JP6651575B2 - Discharge jig for filtrate, filter element device, and method for discharging filtrate - Google Patents

Description

  The present invention relates to a jig for discharging a liquid to be filtered, a filter element device, and a method for discharging a liquid to be filtered.

  BACKGROUND ART Machining fluids, cutting oils, and the like used in metal working machines such as electric discharge machines include impurities such as sludge after machining. Therefore, there is known a filtering device for filtering and reusing a machining fluid, a cutting oil, and the like discharged from a metal working machine.

  For example, in a liquid processing apparatus for wire-cut electric discharge machining disclosed in Patent Document 1, a machining liquid (contaminated liquid) contaminated by the wire-cut electric discharge machining apparatus is temporarily stored in a contaminated liquid tank. The contaminated liquid in the contaminated liquid tank is supplied to the filter medium filter by a pump. The processed working fluid filtered by the filter medium filter is stored in the cleaning fluid tank. The working fluid in the cleaning fluid tank is returned to the wire-cut electric discharge machine again by the pump.

  2. Description of the Related Art As a filter element such as a filter medium filter used in a liquid processing apparatus for wire cut electrical discharge machining described in Patent Document 1, there are an external pressure type filter element and an internal pressure type filter element. In an external pressure type filter element, a cylindrical filter is housed, for example, in a sealed housing. The contaminated liquid is supplied by a pump to an internal space inside the housing and outside the filter. By passing the contaminated liquid toward the inside of the filter while applying pressure to the internal space outside the cylindrical filter, the filtered liquid is removed from the inside of the filter.

  On the other hand, in an internal pressure type filter element such as the filter devices disclosed in Patent Documents 2 and 3, a cylindrical filter is provided in a housing having a large number of through holes formed on a peripheral side surface. Is housed. The contaminated liquid is supplied by a pump inside the cylindrical filter. By passing the contaminated liquid toward the outside of the filter while applying pressure to the inside of the filter, the filtered liquid is discharged from the through hole of the housing.

  In the internal pressure type filter element, since the filtered working fluid or the like is naturally discharged through the through hole of the housing, the pressure applied for sending the processing fluid or the like is smaller than that of the external pressure type filter element. There is an advantage. Therefore, there is an advantage that a small pump can be used. Further, in the case of the internal pressure type filter element, the pressure applied to the working fluid or the like can be reduced, so that the lid is less likely to be detached by the pressure in the housing than in the case of the external pressure type filter element.

  On the other hand, in an internal pressure type filter element, for example, as in a liquid processing apparatus for wire cut electric discharge machining disclosed in Patent Literature 1, a cleaning fluid for storing a filtered machining fluid discharged from a through hole of a housing or the like. A tank is required. Further, in the internal pressure type filter element, two pumps are provided on the upstream and downstream sides of the filter element: a pump for sending a working fluid and the like before the filtering process and a pump for sending a working fluid and the like after the filtering process. A pump is required. Therefore, a filtration device using an internal pressure type filter element has a drawback that the filtration device becomes large. In addition, when the size of the filtration device increases, it is very difficult for a maintenance company that conducts filtration work to transport its own filtration device to the customer where the metal processing machine is installed and perform the filtration work at the customer. It is.

  On the other hand, Patent Document 4 discloses a filter including an internal pressure type filter unit, a lid connected to upper and lower ends of the filter unit, and a cylindrical casing surrounding the filter unit. An element is disclosed. The filter element described in Patent Literature 4 is of an internal pressure type, and is capable of filtering contaminants by passing a liquid to be filtered injected from a supply port provided in a lid from the inside to the outside of the filter unit. . In the filter element described in Patent Literature 4, an internal space is provided along the outer peripheral side surface of the filter unit, and a cylindrical casing surrounding the filter unit covers the internal space. Then, the filtered liquid that has passed through the filter unit accumulates in the internal space in the housing. When the liquid to be filtered is continuously supplied to the injection chamber by the pump, the liquid to be filtered stored in the internal space is discharged from the outlet of the lid by the pressure. For example, when a pipe or the like is connected to the outlet, the liquid to be filtered discharged from the outlet is sent to a metal working machine. According to the filter element described in Patent Literature 4, since a cleaning liquid tank or a dedicated pump for supplying a processing liquid from the cleaning liquid tank to a metal working machine is not required, the size of the filtration device can be reduced. it can.

JP 2005-219201 A JP 2011-136261 A JP 2001-286708 A JP-A-2015-3282

  Here, the filter elements as described in Patent Documents 1 to 4 have a lifetime. That is, the filter filters the processed working fluid, cutting oil, and the like, and removes impurities such as sludge contained in the processed working fluid, the cutting oil, and the like from the contaminated liquid. For this reason, if impurities contained in the processing fluid, the cutting oil, or the like after the processing accumulate in the filter, the filter cannot perform its original function. Therefore, the filter element has a lifetime. For example, a user of the filtration device or the like can grasp the life of the filter and the time of replacement by managing the pressure in the housing in which the filter is housed.

  When the life of the filter comes to an end, a user of the filtration device, a maintenance company, or the like stops the filtration device and replaces the filter element. At this time, in the filter element described in Patent Literature 4, the working fluid and the like before and after the filtration process remain in the housing of the filter element. For example, about 20 liters of machining fluid or the like may remain in the housing of the filter element, and the filter element is relatively heavy in this state. For this reason, the filter element described in Patent Literature 4 has room for improvement in that the burden of replacing the filter element and transporting the used filter element is large.

  That is, when lifting the filter element and discharging the working fluid or the like in the housing from the discharge port to reduce the weight of the filter element, the physical burden of lifting the filter element is relatively large. In addition, even when air is blown into the housing from the supply port to discharge the processing liquid remaining in the housing from the discharge port and lighten the filter element, the air flows directly from the supply port to the discharge port. There is a case where the flow and a predetermined amount or more of the working fluid remain in the housing. As described above, the filter element described in Patent Literature 4 has room for improvement in that it is difficult to discharge the liquid to be filtered remaining in the casing of the used filter element and reduce the weight of the filter element. .

  The present invention has been made in order to solve the above-mentioned problems, and a filtration liquid discharge jig, a filter element device, and a filtration liquid discharge liquid capable of easily discharging a filtration liquid remaining inside a used filter element. And a method for discharging a liquid to be filtered.

  According to the present invention, the object is to provide a filter element for filtering a liquid to be filtered discharged from a metal working machine, and a method for discharging the liquid to be filtered remaining inside the filter element to the outside of the filter element. A jig for discharging the liquid to be filtered, and the filter element is arranged so as to surround an injection chamber into which the liquid to be filtered is injected, and a filter section that receives and filtrates the liquid to be filtered from the inside, A first lid connected to an upper end portion of the filter unit, a supply port for guiding the liquid to be filtered discharged from the metal working machine to the injection chamber, and the filter to be filtered passing through the filter unit. A first lid having a discharge port for introducing a liquid to the outside of the filter element; a second lid connected to a lower end of the filter unit; and a first lid connected to the first lid and the second lid. And a casing surrounding the filter portion and forming an internal space communicating with the discharge port outside the filter portion, wherein the discharge jig has a flow path through which the liquid to be filtered flows. And a cylindrical jig main body extending from the first lid to the second lid in a state where at least a part of the jig main body is inserted through the discharge port into the internal space. The first end of the jig body is located outside the filter element through the outlet in a state where at least a part of the jig body is inserted into the internal space through the outlet, and the other end of the jig body is The two ends are located near the second lid in a state where at least a part of the jig main body is inserted into the internal space through the discharge port, and air flows into the injection chamber through the supply port. When supplied, the liquid to be filtered remaining inside the filter element is guided from the second end to the flow path by the pressure of the air, and is passed through the opening of the first end to form the filter element. The problem is solved by a filter element device characterized by being discharged to the outside.

  According to the above configuration, the filter element device according to the present invention discharges the liquid to be filtered discharged from the metal processing machine and the liquid to be filtered remaining inside the filter element to the outside of the filter element. And a jig for discharging the liquid to be filtered which is sometimes used. The filter element is a filtration unit including a filter unit, a first lid, a second lid, and a housing. The filter section is arranged so as to surround the injection chamber into which the liquid to be filtered is injected, and receives the liquid to be filtered from the inside and filters it. That is, the filter element is an internal pressure type filter element. The first lid is provided with a supply port for guiding the liquid to be filtered to the injection chamber and a discharge port for guiding the liquid to be filtered that has passed through the filter unit to the outside of the filter element. The housing surrounds the filter unit and forms an internal space communicating with the outlet outside the filter unit.

  The discharge jig has a cylindrical jig body. The jig main body has a flow path through which the liquid to be filtered flows therein, and extends from the first lid to the second lid in a state where at least a part thereof is inserted into the internal space through the outlet of the filter element. That is, the jig body is a cylindrical body having a length extending from the first lid to the second lid. One first end of the jig body is located outside the filter element through the outlet when at least a part of the jig body is inserted into the internal space through the outlet of the filter element. The other second end of the jig body is located near the second lid when at least a part of the jig body is inserted into the internal space through the outlet of the filter element. Then, when air is supplied to the injection chamber through the supply port of the filter element, the liquid to be filtered remaining inside the filter element is guided from the second end to the flow path of the jig main body by the pressure of the air. It is discharged outside the filter element through an opening at one end.

  That is, when the jig body is inserted into the internal space through the outlet of the filter element, the outlet around the jig body is narrower than the gap between the second end and the second lid. For this reason, when air is supplied to the injection chamber, the pressure inside the filter element increases, and the liquid to be filtered remaining inside the filter element flows from the first lid connected to the upper end of the filter unit. It flows toward the second lid connected to the lower end of the filter section. The liquid to be filtered that has flowed toward the second lid is not discharged from the jig body but through the gap between the second end and the second lid from the second end to the jig body. And is discharged to the outside of the filter element through the opening at the first end.

  According to this, the amount of the liquid to be filtered remaining inside the filter element is suppressed to a predetermined amount or less, and a large amount of the liquid to be filtered remaining inside the filter element is discharged to the outside of the filter element through the flow path of the jig body. can do. Thus, the filter element device according to the present invention can easily discharge the liquid to be filtered remaining inside the used filter element.

  In the filter element device according to the present invention, preferably, the second end portion contacts the inner surface of the second lid in a state where at least a part of the jig main body is inserted into the internal space through the discharge port. And an inflow port that penetrates the jig body from the outside of the flow path to the inside of the flow path.

  According to the above configuration, the second end abuts on the inner surface of the second lid when at least a part of the jig main body is inserted into the internal space through the outlet. The inflow port provided at the second end of the jig main body penetrates the jig main body from outside the flow path to inside the flow path. Therefore, the liquid to be filtered existing in the vicinity of the inner surface of the second lid and the liquid to be filtered in contact with the inner surface of the second lid are more reliably guided to the flow path of the jig main body through the inflow port. . That is, for example, when the filter unit is bonded and connected to the second lid with an adhesive, the thickness of the adhesive may vary. Then, the distance between the outlet and the inner surface of the second lid changes according to the thickness of the adhesive. Therefore, it is difficult to manage the distance between the outlet and the inner surface of the second lid, and to manage the gap between the second lid and the second end. On the other hand, in the above configuration, the second end abuts on the inner surface of the second lid in a state where at least a part of the jig main body is inserted into the internal space through the outlet. Further, the inflow port provided at the second end penetrates the jig main body from outside the flow path to inside the flow path. Therefore, it is possible to secure a certain space (inflow port) at the second end without managing the gap between the second lid and the second end. As a result, the liquid to be filtered remaining inside the used filter element is more reliably discharged to the outside of the filter element.

  In the filter element device according to the present invention, preferably, the filter element device is connected to the opening at the second end.

  According to the configuration, in the state where the second end portion is in contact with the inner surface of the second lid, it is possible to secure an inflow port having an opening area equal to or greater than a certain value. Thereby, when the air is supplied to the injection chamber through the supply port of the filter element, it is possible to suppress the pressure inside the filter element from becoming excessively high.

  In the filter element device according to the present invention, preferably, the second end has two of the inlets, and the two inlets are arranged with respect to a central axis extending along a longitudinal direction of the jig body. It is characterized by being provided at symmetrical positions.

  According to the configuration, the two inflow ports are provided at symmetrical positions with respect to the central axis extending along the longitudinal direction of the jig main body. That is, when viewed along the longitudinal direction of the jig body, the two inflow ports are provided at positions facing each other. As a result, the liquid to be filtered existing near the inner surface of the second lid and the liquid to be filtered in contact with the inner surface of the second lid are almost equally cured from the two inflow ports provided at positions opposed to each other. It is led to the channel of the component body. As a result, the liquid to be filtered remaining inside the used filter element is more reliably discharged to the outside of the filter element.

  According to the present invention, there is provided a method for discharging a liquid to be filtered, which discharges the liquid to be filtered remaining inside a filter element for filtering a liquid to be filtered discharged from a metal working machine, to the outside of the filter element. The filter element is disposed so as to surround an injection chamber into which the liquid to be filtered is injected, and is connected to an upper end portion of the filter section, the filter being configured to receive and filter the liquid to be filtered from the inside. A first lid for supplying the liquid to be filtered discharged from the metal working machine to the injection chamber; and a discharge port for guiding the liquid to be filtered that has passed through the filter section to the outside of the filter element. A first lid having a second lid connected to a lower end of the filter unit, the first lid being connected to the first lid and the second lid, and surrounding the filter unit; Exhaustion A housing that forms an internal space that communicates with a port outside the filter unit, and a filter that includes a cylindrical jig body that has a flow path through which the liquid to be filtered flows inside. A step of inserting at least a part of the liquid discharging jig into the internal space through the discharge port, and in a state where at least a part of the liquid discharging jig is inserted into the internal space through the discharge port, the jig body Positioning one first end of the jig body outside the filter element through the discharge port, and positioning the other second end of the jig body near the second lid body; Supply the air to the injection chamber through, the liquid to be filtered remaining inside the filter element is guided from the second end to the flow path by the pressure of the air, and through the opening of the first end, A step of discharging to the outside of the I filter element is solved by the method for discharging the liquid to be filtered, characterized in that it comprises a.

  According to the above configuration, the method for discharging the liquid to be filtered according to the present invention is a method for discharging the liquid to be filtered remaining inside the filter element for filtering the liquid to be filtered discharged from the metal working machine to the outside of the filter element. It is. A filter element to which the discharging method according to the present invention is applied is a filtration unit including a filter unit, a first lid, a second lid, and a housing. The filter section is arranged so as to surround the injection chamber into which the liquid to be filtered is injected, and receives the liquid to be filtered from the inside and filters it. That is, the filter element to which the discharge method according to the present invention is applied is an internal pressure type filter element. The first lid is provided with a supply port for guiding the liquid to be filtered to the injection chamber and a discharge port for guiding the liquid to be filtered that has passed through the filter unit to the outside of the filter element. The housing surrounds the filter unit and forms an internal space communicating with the outlet outside the filter unit.

  In the method for discharging a liquid to be filtered according to the present invention, first, at least a part of a jig for discharging a liquid to be filtered provided with a cylindrical jig main body having a flow path through which the liquid to be filtered is provided is provided with a first lid. The step of inserting into the internal space of the filter element through the outlet provided in the body is performed. Subsequently, in a state where at least a part of the discharge jig is inserted into the internal space through the discharge port, one first end of the jig main body is positioned outside the filter element through the discharge port, and A step of positioning the other second end near the second lid is performed. Subsequently, air is supplied to the injection chamber through the supply port, and the liquid to be filtered remaining inside the filter element is guided from the second end to the flow path of the jig body by the pressure of the air, and the opening at the first end is opened. Through the filter element to the outside of the filter element.

  That is, a step of inserting at least a part of the jig for discharging the liquid to be filtered into the internal space of the filter element through the outlet, and positioning one first end of the jig main body outside the filter element through the outlet. The step of positioning the other second end of the jig body near the second lid allows the outlet around the jig body to be larger than the gap between the second end and the second lid. Narrows. Therefore, in the step of discharging the liquid to be filtered remaining inside the filter element to the outside of the filter element, when air is supplied to the injection chamber, the pressure inside the filter element increases, and the inside of the filter element becomes high. The remaining liquid to be filtered flows from the first lid connected to the upper end of the filter to the second lid connected to the lower end of the filter. The liquid to be filtered that has flowed toward the second lid is not discharged from the jig body but through the gap between the second end and the second lid from the second end to the jig body. And is discharged to the outside of the filter element through the opening at the first end.

  According to this, the amount of the liquid to be filtered remaining inside the filter element is suppressed to a predetermined amount or less, and a large amount of the liquid to be filtered remaining inside the filter element is discharged to the outside of the filter element through the flow path of the jig body. can do. Thus, the method for discharging a liquid to be filtered according to the present invention can easily discharge the liquid to be filtered remaining inside the used filter element.

  ADVANTAGE OF THE INVENTION According to this invention, the discharge jig of the to-be-filtrated liquid which can easily discharge the to-be-filtrated liquid remaining in the used filter element, the filter element apparatus, and the method of discharging the to-be-filtered liquid are provided. Can be.

It is a perspective view showing the filter element device concerning the embodiment of the present invention. FIG. 2 is a cross-sectional view taken along a cutting plane AA shown in FIG. 1. FIG. 2 is a cross-sectional view taken along a cutting plane AA shown in FIG. 1. FIG. 4 is a cross-sectional view taken along a cutting plane BB illustrated in FIG. 3. FIG. 2 is a plan view illustrating a jig for discharging a liquid to be filtered according to the embodiment. FIG. 6 is an enlarged view of an area A11 shown in FIG. 5. It is sectional drawing in cut surface CC shown in FIG. It is a top view showing the filtration device provided with the filter element concerning this embodiment. FIG. 9 is a plan view illustrating the filtering device when viewed from a direction of an arrow A2 illustrated in FIG. 8. FIG. 9 is a plan view illustrating the filtering device when viewed from a direction of an arrow A3 illustrated in FIG. 8. 4 is a flowchart illustrating a method for discharging a liquid to be filtered according to the embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
Note that the embodiments described below are preferred specific examples of the present invention, and therefore, various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. It is not limited to these embodiments unless otherwise stated. In the drawings, similar components are denoted by the same reference numerals, and detailed description will be omitted as appropriate.

FIG. 1 is a perspective view illustrating a filter element device according to an embodiment of the present invention.
FIG. 2 and FIG. 3 are cross-sectional views taken along the cutting plane AA shown in FIG.
FIG. 4 is a cross-sectional view taken along a cutting plane BB shown in FIG.
In FIG. 1, for convenience of description, a part of the side surface of the housing 40 is cut away. FIG. 2 is a cross-sectional view illustrating a state before the jig for discharging a liquid to be filtered according to the embodiment of the present invention is inserted into the internal space S <b> 2 of the housing 40. FIG. 3 is a cross-sectional view illustrating a state after the jig for discharging the liquid to be filtered according to the present embodiment is inserted into the internal space S2 of the housing 40.

  The filter element device 100 according to the present embodiment includes a filter element 10 and a jig 110 for discharging a liquid to be filtered. The filter element 10 filters the liquid to be filtered discharged from the metalworking machine, and is also called a filter device or a filtration unit. The liquid to be filtered is the liquid to be filtered. The liquid to be filtered by the filter element 10 is circulated between the filter element 10 and a metal working machine for use (for example, see FIG. 8). For example, the liquid to be filtered is a machining fluid used for machining with a wire electric discharge machine or the like, a cutting oil used for machining with a machine tool, or the like. In the present embodiment, a case where the liquid to be filtered is a machining liquid of a wire electric discharge machine will be described as an example. The liquid to be filtered jig 110 is used to discharge the liquid to be filtered remaining inside the filter element 10 to the outside of the filter element 10.

  First, the filter element 10 of the present embodiment will be described. As shown in FIG. 1, the filter element 10 has a substantially cylindrical shape. In the example of the filter element 10 shown in FIGS. 1 to 3, the diameter φ1 is about 300 mm and the height H1 is about 280 mm. The filter element 10 is relatively small and has a rotatable handle 13, so that a user of the filter element 10 or a maintenance company can easily carry the filter element 10 with one hand.

As illustrated in FIGS. 2 to 4, the filter element 10 includes a filter unit 20, a lid 30, and a housing 40.
The filter unit 20 is arranged so as to surround the injection chamber 12 into which the liquid to be filtered is injected, and receives the liquid to be filtered from the inside and filters it. The injection chamber 12 is a space into which the liquid to be filtered before the filtration treatment is injected by an external pump (not shown), has a substantially columnar shape as a whole, and is arranged at the center of the filter unit 20. As shown by an arrow F1 in FIGS. 2 and 3, the filtrate to be injected into the injection chamber 12 flows from the injection chamber 12 toward the filter unit 20. In addition, the volume of the injection chamber 12 of this embodiment is about 19 to 20% of the volume of the entire filter element 10. The injection chamber 12 is sealed by the lid 30. Therefore, the liquid to be filtered injected into the injection chamber 12 is prevented from leaking outside the filter element 10.

  The filter unit 20 has a filter 23. The filter 23 has a cylindrical shape as a whole. Specifically, the filter 23 is provided as an annular body. As shown in FIG. 4, the peripheral side surface of the filter 23 is continuously folded into a shape called a fold shape or a pleated shape, and has a large number of fold portions 24. The fold 24 is bent so that the pleated line 24a extends in the height H1 direction. Such a filter 23 is also called a pleated filter or the like. A space S1 is formed between the adjacent folds 24. In the filter 23 of the present embodiment, the volume of the space S1 is substantially the same in any region.

  As the filter 23, a filter paper mainly made of pulp is preferably used. The burst strength of the filter 23 is, for example, 245 kPa or less. The filtration accuracy of the filter 23 is about 0.5 μm, which is extremely high among filter papers. Thereby, the filter 23 of the present embodiment can perform highly accurate filtration. With respect to the filter 23 using such high-precision filter paper, it is difficult to remove the filter 23 from the filter element 10 and wash it. Therefore, the filter 23 of this embodiment is used as a disposable member in principle, and the filter element 10 is disassembled and replaced with a new one. The filter 23 of the present embodiment is not limited to the above-described configuration, and may be, for example, a filter on which the unevenness is applied to the surface of the filter paper, or a filter on which the wet strength is enhanced. Further, as the filter 23, a nonwoven fabric may be used.

  The lid 30 is made of metal and is also called an end plate or the like, and is bonded to the upper end 23b of the filter 23 and the lower end 23c of the filter 23 with an adhesive as shown in FIGS. As an adhesive for bonding the lid 30 and the filter 23 to each other, an adhesive such as an epoxy resin-based adhesive that does not decrease in adhesive strength even when immersed in water and that can be peeled off by heating or the like is used. Thereby, the gap between the lid 30 and the filter 23 is closed. In addition, the lid 30 covers the injection chamber 12 and the filter unit 20 (including the space S1 illustrated in FIG. 4). Further, the lid 30 not only covers the injection chamber 12 and the filter section 20 (including the space S1 shown in FIG. 4), but also extends in the radial direction and covers the internal space S2. In other words, as shown in FIGS. 1 to 3, the lid 30 covers the entire upper opening of the housing 40 and the entire lower opening of the housing 40.

  The lid 30 has an upper lid 31 and a lower lid 32. The upper lid 31 is connected to the upper end 23b of the filter 23 with an adhesive. The lower lid 32 is bonded and connected to the lower end 23c of the filter 23 with an adhesive. In the filter element 10 of the present embodiment, an adhesive for bonding the lid 30 and the filter 23 to each other is included in a part of the lid 30. That is, the adhesive for bonding the upper lid 31 and the upper end 23b of the filter 23 to each other is included in a part of the upper lid 31. The adhesive for bonding the lower lid 32 and the lower end 23c of the filter 23 to each other is included in a part of the lower lid 32. The upper lid 31 of the present embodiment is an example of a first lid of the present invention. The lower lid 32 of the present embodiment is an example of a second lid of the present invention.

  The upper lid 31 has a supply port 14 for guiding the liquid to be filtered into the injection chamber 12 and an outlet 18 for guiding the liquid to be filtered that has passed through the filter section 20 to the outside of the filter element 10. The supply port 14 is a through-hole penetrating along the central axis CL1 of the coupler (fluid coupling) 33, and directly communicates with the inner region S3. Details of the inside area S3 will be described later. The central axis CL1 of the coupler 33 substantially matches the central axis CL2 of the housing 40. The coupler 33 penetrates the upper lid 31 and is fastened with a nut 34. The discharge port 18 is a through-hole penetrating along the central axis CL3 of the coupler (fluid coupling) 35, and directly communicates with the internal space S2. The coupler 35 penetrates at the position of the peripheral edge of the upper lid 31 corresponding to the internal space S2, and is fastened with a nut 36. Each of the diameter φ2 of the discharge port 18 and the diameter φ3 of the supply port is about 20 mm.

  The upper lid 31 and the lower lid 32 can be disassembled from the housing 40. A user of the filter element 10, a maintenance company, or the like can replace the filter 23 and the like by disassembling at least one of the upper lid 31 and the lower lid 32 from the housing 40. In the filter element 10 of the present embodiment, the upper lid 31 and the lower lid 32 are provided as separate members and can be disassembled from the housing 40, but are not limited thereto. For example, one of the upper lid 31 and the lower lid 32 may be provided as a separate member from the housing 40, and the other of the upper lid 31 and the lower lid 32 may be formed integrally with the housing 40. In this case, one of the upper lid 31 and the lower lid 32 can be disassembled from the housing 40.

  The housing 40 is a housing made of metal and connected to the lid 30 to seal the injection chamber 12 and the filter unit 20. The filter unit 20 is housed in a space surrounded by the housing 40 and the lid 30. As shown in FIGS. 2 and 3, the housing 40 is bonded to the inner side surface 30 a of the box-shaped lid 30 on the outer peripheral side surface 40 b. As an adhesive for bonding the outer peripheral side surface 40b of the housing 40 and the inner side surface 30a of the lid body 30 to each other, an adhesive such as an epoxy resin is used in consideration of adhesiveness, decomposability, waterproofness, and the like.

  As shown in FIGS. 1 and 4, no holes or the like are provided on the peripheral side surface of the housing 40. As shown in FIG. 4, the housing 40 has a cylindrical shape, surrounds the filter unit 20, and forms an internal space S <b> 2 along the outer peripheral side surface of the filter unit 20. That is, as shown in FIG. 4, the internal space S <b> 2 is provided between the inner surface 40 a of the housing 40 and the outer peripheral side surface of the filter unit 20 over the entire periphery of the filter unit 20. As a result, the liquid to be filtered (the processing liquid after the filtration process) that has passed through the filter unit 20 temporarily accumulates in the internal space S2.

  As shown in FIG. 4, in the filter element 10 of the present embodiment, the interval W between the inner surface 40a of the housing 40 and the outer peripheral side surface of the filter unit 20 is not constant, and the outlet W in the internal space S2. 18 is the smallest in the region S2-1 farthest from the region 18, and gradually increases from the region S2-1 toward the region S2-2 in which the outlet 18 is provided. However, the interval W between the inner surface 40a of the housing 40 and the outer peripheral side surface of the filter unit 20 is not limited to this, and may be constant.

  In the filter element 10 of the present embodiment, the following various means are used to smooth the flow of the liquid to be filtered after passing through the filter 23 and to reduce the load on the external pump. That is, the filter unit 20 has the cylindrical partition plate 26 provided on the outer peripheral side of the filter 23. The partition plate 26 partitions the internal space S2 and the space in which the filter 23 is provided. The partition plate 26 is made of metal and is a member for rectifying the flow of the liquid to be filtered, which has been disturbed by the filter 23, in the internal space S2.

  The partition plate 26 has a plurality of through holes 26a. The through hole 26a is a hole that passes through the partition plate 26 in the thickness direction. As indicated by an arrow F2 shown in FIG. 4, the liquid to be filtered (the processing liquid after the filtration process) supplied to the injection chamber 12 and passed through the filter unit 20 passes through the through-hole 26a of the partition plate 26 and has an internal space. It gushes toward the S2 side. As shown in FIGS. 1 to 4, the plurality of through holes 26 a are formed uniformly on the peripheral side surface of the partition plate 26, and are arranged in a staggered manner on the entire peripheral side surface of the partition plate 26. Accordingly, the partition plate 26 uniformly jets the liquid to be filtered into the internal space S2 without bias. The diameter of one through hole 26a is about 6 mm. The total area of the plurality of through holes 26a is about half (about 51%) of the area of the partition plate 26.

  Further, the partition plate 26 has a flow path 26b that guides the flow of the liquid to be filtered (see the arrow F2 shown in FIGS. 1 and 4) in the horizontal direction. The channel portion 26b is formed by the peripheral side surface of the partition plate 26 excluding the through hole 26a. The partition plate 26 has a similar shape to the cylindrical housing 40 in plan view. Thereby, it is possible to suppress the occurrence of the concave and convex portions in the internal space S2, and to regulate the flow of the liquid to be filtered.

  The filter section 20 including the partition plate 26 is eccentrically arranged on the side opposite to the outlet 18 with respect to the central axis CL2 of the housing 40. That is, the partition plate 26 and the housing 40 have similar circular shapes in plan view. Therefore, as shown in FIG. 4, the distance W between the outer surface of the partition plate 26 and the inner surface of the housing 40 is smallest in the region S2-1 of the internal space S2 that is farthest from the discharge port 18, and is smaller in the region S2- 1 and gradually increases toward the region S2-2 where the discharge port 18 is provided. Accordingly, the internal pressure of the internal space S2 is relatively high in the region S2-1 of the relatively narrow space, and gradually decreases toward the region S2-2. Therefore, for the liquid to be filtered in the internal space S2, a flow (see the arrow F2 shown in FIGS. 1 and 4) from the region S2-1 to the region S2-2 on the discharge port 18 side can be created.

  As described above, the filter section 20 including the partition plate 26 does not necessarily have to be eccentric with respect to the center axis CL2 of the housing 40. For example, the central axis of the filter unit 20 including the partition plate 26 may match the central axis CL2 of the housing 40.

  Further, in the filter element 10 of the present embodiment, it is possible to prevent the lid 30 from coming off the housing 40 due to the pressure applied to the inside of the housing 40 and to prevent a gap from being generated between the lid 30 and the filter unit 20. In order to suppress this, the following various means are used. That is, the connecting body 50 that connects the upper lid 31 and the lower lid 32 is housed in the injection chamber 12. The connecting body 50 prevents the upper lid 31 and the lower lid 32 from coming off the housing 40. The connecting body 50 is provided not only as a connection between the upper lid 31 and the lower lid 32 but also as a filter capable of filtering. The filter unit 20 is an example of a first filter unit. The connection body 50 inside the first filter unit is an example of a second filter unit.

  The connecting body 50 has a cylindrical shape as a whole. The upper end of the connector 50 and the lower end of the connector 50 are bonded to the lid 30 with an adhesive in consideration of adhesiveness and decomposability. As the adhesive for bonding the connecting body 50 and the lid 30 to each other, an epoxy resin-based adhesive similar to the adhesive for bonding the lid 30 and the filter 23 to each other may be used. The connecting body 50 is arranged at the center of the housing 40 in a plan view. That is, the central axis of the connector 50 substantially matches the central axis CL2 of the housing 40. The inner region S3 of the connector 50 is arranged corresponding to the supply port 14. As shown in FIGS. 2 and 3, the coupler 33 having the supply port 14 is connected to the upper lid 31 so as to protrude into the inner region S <b> 3 of the connector 50. Therefore, the liquid to be filtered supplied to the inside of the housing 40 through the supply port 14 is first injected into the inner region S3.

  The coupling body 50 is a pleated filter similar to the filter 23 of the filter unit 20. The connecting body 50 is formed of a coarser filter having a higher tensile strength than the filter 23 of the filter unit 20.

  The connecting body 50 of the present embodiment is a nonwoven fabric filter. For example, the nonwoven fabric used for the connector 50 is formed by elongating and spinning a polyester resin or the like by a spun bond method to form long synthetic fibers, and connecting the length direction of the synthetic fibers with the upper lid 31 and the lower lid 32 ( 2 and 3) as much as possible, and is formed by heat welding a large number of synthetic fibers. Such a nonwoven has a relatively high tensile strength. An example of such a nonwoven fabric is Axter (trademark) of Toray Industries, Inc. The filtering accuracy of the filter of the connecting body 50 is about 10 μm, which is about 1/20 of the filtering accuracy of the filter 23 of the filter unit 20 of 0.5 μm. Since the connection body 50 has a relatively large tensile strength, the connection state between the upper lid 31 and the lower lid 32 can be maintained even when the inner region S3 is the highest pressure region in the filter element 10. In addition, the coupling body 50 can reduce the influence of the pressure due to the coarseness of the eyes, and can prevent deformation and the detachment of the lid 30 due to the deformation.

  A cylindrical metal body 52 is disposed inside the connecting body 50. The metal body 52 has a plurality of openings 37 penetrating in the thickness direction, and causes the liquid to be filtered to be ejected from the inner region S3 toward the connector 50 through the openings 37. The opening 37 is uniformly formed on the entire surface in the same manner as the partition plate 26 so that the liquid to be filtered can be rectified. The metal body 52 is connected to the upper lid 31 and the lower lid 32 with an adhesive at the upper and lower ends, and even if the inner area S3 is the highest pressure area inside the filter element 10, the upper lid 31 and the lower lid 32 are connected. Can be reliably connected. That is, in the present embodiment, the connection between the upper cover 31 and the lower cover 32 is performed between the upper and lower ends of the filter unit 20, the connected body 50, the metal body 52, and the housing 40 and the cover 30 as long as the cover 30 can be disassembled. It is performed by bonding using an adhesive.

  A space with a spacing W4 is provided between the metal body 52 and the connecting body 50. The space between the metal body 52 and the connecting body 50 can suppress the influence of the force of the flow of the liquid to be filtered ejected from the opening 37 of the metal body 52. Specifically, the space between the metal body 52 and the connecting body 50 suppresses the pressure applied to the connecting body 50 from the flow of the liquid to be filtered ejected from the opening 37 of the metal body 52, and the connecting body 50 as a filter Can be prevented from being damaged.

  As shown in FIG. 4, the connector 50 has a pressure release unit 55. In the example illustrated in FIG. 4, the pressure release unit 55 is a cut or a cutout formed in the nonwoven fabric of the connecting body 50 and extends in a direction orthogonal to a virtual line GL connecting the region S2-1 and the region S2-2. It is arranged at two places along. The pressure release portion 55 releases the pressure inside the connecting body 50 to the outside of the connecting body 50, and can more reliably prevent the deformation of the connecting body 50 and the detachment of the lid 30 due to the deformation of the connecting body 50.

  The bending angle θ2 when bending the connecting body 50 as a filter is smaller than the bending angle θ1 when bending the filter 23 of the filter unit 20. Thereby, the connecting body 50 can be formed as a dense filter, and it is possible to make it difficult for foreign substances captured by the connecting body 50 to escape. In addition, the connecting body 50 can be formed as a filter having higher strength.

Next, the flow of the liquid to be filtered in the filter element 10 of the present embodiment will be described with reference to the drawings.
First, the liquid to be filtered discharged from the metal working machine is guided to the inner region S3 of the connector 50 through the supply port 14 by an external pump. As the external pump continues to supply the liquid to be filtered to the inner region S3 of the connector 50 through the supply port 14, the internal pressure of the inner region S3 increases. Then, the liquid to be filtered guided to the inner region S3 is guided to the connecting body 50 as a filter through the opening 37 of the metal body 52. The liquid to be filtered guided to the connecting body 50 is filtered by passing through the connecting body 50 as a filter. That is, when the liquid to be filtered passes through the connecting body 50, the filtration of the liquid to be filtered is performed. The liquid to be filtered that has passed through the connector 50 flows from the space outside the connector 50 in the injection chamber 12 toward the filter unit 20 as indicated by an arrow F1 shown in FIGS. Of the filter 23. That is, when the liquid to be filtered passes through the filter 23, the filtration of the liquid to be filtered is further performed. The liquid to be filtered that has passed through the filter unit 20 is guided to the internal space S2 through the through hole 26a of the partition plate 26, and temporarily accumulates in the internal space S2. The liquid to be filtered once accumulated in the internal space S2 is discharged to the outside of the filter element 10 through the discharge port 18.

  As described above, the filter element 10 of the present embodiment is a so-called internal pressure type filter element, and the liquid to be filtered (the processing liquid before the filtration process) is continuously injected into the injection chamber 12 by the external pump, so that the injection chamber 12 is formed. The liquid to be filtered is filtered by increasing the internal pressure of the filter and passing the filter through the connecting body 50 as a filter and the filter 23 of the filter section 20. The filter element 10 of the present embodiment continuously discharges the liquid to be filtered (the processing liquid before the filtration process) into the injection chamber 12 by an external pump, thereby discharging the liquid to be filtered once accumulated in the internal space S2 to the outlet. It is discharged to the outside of the filter element 10 through 18.

  According to the filter element 10 of the present embodiment, even if the filter element is of an internal pressure type, the cleaning liquid tank for storing the processing liquid and the like after the filtration processing and the processing liquid and the like after the filtration processing stored in the cleaning liquid tank are used. A dedicated pump for supplying the metal working machine can be eliminated.

  Here, the connection body 50 as a filter and the filter 23 have a life. That is, in the following description, taking the filter 23 as an example, the filter 23 filters the processed working fluid and removes impurities such as sludge contained in the processed working fluid from the liquid to be filtered. Therefore, if impurities contained in the processing fluid after processing accumulate in the filter 23, the filter 23 cannot perform its original function. Therefore, the filter 23 has a life. For example, a user of the filter element 10 or a maintenance business operator can grasp the life of the filter 23 and the replacement time by managing the pressure in the housing 40 in which the filter 23 is accommodated.

  As described above, the filter 23 is used as a disposable member in principle. Therefore, when the life of the filter 23 has expired, the user of the filter element 10 or the maintenance operator stops the filtering device 60 (see FIG. 8), disassembles the filter element 10 and replaces the used filter 23 with a new one. Replace with filter 23. At this time, the working fluid before and after the filtration process may remain in the casing 40 of the filter element 10. For example, about 20 liters of the working fluid may remain in the housing 40 of the filter element 10. The filter element is relatively heavy when the working fluid remains in the housing of the filter element. Therefore, in a state where the working fluid remains in the housing of the filter element, the burden of replacing the filter and transporting the used filter element is large.

  That is, when lifting the filter element and discharging the working fluid in the housing from the discharge port to reduce the weight of the filter element, the physical burden of lifting the filter element is relatively large. In addition, even when air is blown into the housing from the supply port and the processing liquid remaining in the housing is discharged from the discharge port to lighten the filter element, air flows directly from the supply port to the discharge port. In some cases, a predetermined amount or more of the working fluid may remain in the housing. As described above, the work of discharging the liquid to be filtered remaining in the casing of the used filter element and reducing the weight of the filter element may cause a physical burden or may cause difficulty.

  On the other hand, the filter element device 100 according to the present embodiment includes the drainage jig 110 for discharging the liquid to be filtered remaining inside the filter element 10 to the outside of the filter element 10. . As shown by an arrow A1 in FIG. 1, the user of the filter element 10 or a maintenance company, when discharging the liquid to be filtered remaining inside the filter element 10 to the outside of the filter element 10, performs a drainage treatment. The tool 110 is inserted into the internal space S2 through the outlet 18.

  The discharge jig 110 for the liquid to be filtered is a cylindrical jig having therein a flow channel 112 (see FIG. 5) through which the liquid to be filtered flows. As shown in FIG. It extends from the upper lid 31 to the lower lid 32 when inserted in S2. Specifically, as shown in FIGS. 3 and 4, when the discharge jig 110 is inserted into the internal space S <b> 2, one first end 113 of the discharge jig 110 is filtered through the discharge port 18. It is located outside the element 10. When the ejection jig 110 is inserted into the internal space S2, the other second end 115 of the ejection jig 110 is located near the lower lid 32. Specifically, in the present embodiment, the other second end 115 of the discharge jig 110 contacts the inner surface 32 a of the lower lid 32. Here, as described above, the adhesive for bonding the lower lid 32 and the lower end 23c of the filter 23 to each other is included in a part of the lower lid 32. Therefore, in the present embodiment, the range of “contacting the inner surface 32a of the lower lid 32” is defined as “the inner surface 32a of the lower lid 32 through an adhesive for bonding the lower lid 32 and the lower end portion 23c of the filter 23 to each other. Contact with ". The second end 115 has an inlet 116 that connects the outside of the flow channel 112 and the inside of the flow channel 112.

  As shown in FIGS. 3 and 4, when air is supplied to the injection chamber 12 through the supply port 14 in a state where the discharge jig 110 is inserted into the internal space S2, the air remaining in the filter element 10 is removed. The filtrate is guided to the flow channel 112 of the discharge jig 110 through the inlet 116 of the discharge jig 110 by the pressure of the air, and is discharged to the outside of the filter element 10 through the opening 114 of the first end 113.

  That is, the outer diameter of the discharge jig 110 is slightly smaller than the diameter φ2 of the discharge port 18. Therefore, in a state where the discharge jig 110 is inserted into the internal space S2 through the discharge port 18 of the filter element 10, a gap between the outer surface of the discharge jig 110 and the inner surface of the coupler 35, that is, around the discharge jig 110. The outlet 18 is narrower than the gap between the second end 115 and the lower lid 32. Here, in the specification of the present application, a gap generated between the end of the second end 115 and the inner surface 32a of the lower lid 32 is in a range of “gap between the second end 115 and the lower lid 32”. In addition to this, it is assumed that a space (inflow port 116 in the present embodiment) provided at the second end 115 is included. Therefore, when air is supplied to the injection chamber 12, the pressure inside the filter element 10 increases, and the liquid to be filtered remaining inside the filter element 10 is removed from the upper lid 23 b connected to the upper end 23 b of the filter 23. It flows from 31 toward the lower lid 32 connected to the lower end 23 c of the filter 23. Then, the liquid to be filtered flowing toward the lower lid 32 flows from the second end 115 through the gap between the second end 115 and the lower lid 32 instead of the discharge port 18 around the discharge jig 110. The liquid is guided to the channel 112 and discharged to the outside of the filter element 10 through the opening 114 of the first end 113.

  According to the filter element device 100 according to the present embodiment, the amount of the liquid to be filtered remaining inside the filter element 10 is suppressed to a predetermined amount or less, and a large amount of the liquid to be filtered remaining inside the filter element 10 is discharged. It can be discharged to the outside of the filter element 10 through the flow path 112 of 110. Thus, the filtrate jig 110 according to the present embodiment can easily discharge the filtrate remaining inside the used filter element 10.

Next, the drainage jig 110 for the liquid to be filtered according to the present embodiment will be further described with reference to the drawings.
FIG. 5 is a plan view illustrating a jig for discharging a liquid to be filtered according to the present embodiment.
FIG. 6 is an enlarged view of the area A11 shown in FIG.
FIG. 7 is a cross-sectional view taken along a cutting plane CC shown in FIG.

  The filtrate jig 110 according to the present embodiment includes a cylindrical jig body 111. The jig main body 111 has therein a flow path 112 through which the liquid to be filtered flows. The channel 112 penetrates the jig main body 111 from the first end 113 to the second end 115. That is, the end of the first end 113 is opened as the opening 114. The end of the second end 115 is opened as an opening 117. As a result, the liquid to be filtered that has flowed into the inside of the flow channel 112 from one of the opening 114 of the first end 113 and the opening 117 of the second end 115 is The fluid can flow to the outside of the flow channel 112 from one of the openings 117 of the second end 115.

  In the specification of the present application, the term “end” refers to not only the end of the discharge jig but also a portion near the end of the discharge jig, that is, a predetermined direction from the end of the discharge jig toward the center in the longitudinal direction of the discharge jig. Length part.

  The jig main body 111 extends from the upper lid 31 to the lower lid 32 in a state where at least a part thereof is inserted into the internal space S2 through the outlet 18. The length L1 of the jig body 111 in the longitudinal direction is longer than the height H1 of the filter element 10. Therefore, when at least a part of the jig body 111 is inserted into the internal space S2 through the discharge port 18 and the second end 115 contacts the inner surface 32a of the lower lid 32, the first end 113 is discharged. It is located outside the filter element 10 through the outlet 18.

  The second end 115 has an inlet 116 that connects the outside of the flow channel 112 and the inside of the flow channel 112. As shown in FIG. 6, the inflow port 116 penetrates the jig body 111 from the outside of the flow channel 112 to the inside of the flow channel 112, and is connected to the opening 117 of the second end 115. That is, the inlet 116 is connected to the opening 117 at the second end. However, as long as the inflow port 116 is provided at the second end 115, the inlet 116 does not necessarily need to be connected to the opening 117 of the second end 115.

  In the example of the discharge jig 110 illustrated in FIGS. 5 to 7, the second end 115 has two inlets 116. As shown in FIG. 7, the two inflow ports 116 are provided at symmetrical positions with respect to a center axis CL <b> 4 extending along the longitudinal direction of the jig main body 111. However, the number of the inlets 116 is not limited to two, and may be one or three or more.

  The material of the jig main body 111 may be metal or resin. For example, as a material of the jig body 111, a material containing stainless steel (SUS) can be used.

  As described above with reference to FIGS. 1 to 4, the outer diameter of the discharge jig 110, that is, the outer diameter of the jig main body 111 is slightly smaller than the diameter φ2 of the discharge port 18. In other words, the diameter φ2 of the discharge port 18 is slightly larger than the outer diameter of the jig main body 111. Therefore, when air is supplied to the injection chamber 12, the liquid to be filtered flowing toward the lower lid 32 is not supplied to the discharge port 18 around the jig main body 111 but to the inflow port provided at the second end 115. After passing through 116, it is guided to the flow path 112 of the jig main body 111. At this time, since the second end 115 contacts the inner surface 32a of the lower lid 32 and the inflow port 116 is provided at the second end 115, the liquid to be filtered existing near the inner surface 32a of the lower lid 32 Further, the liquid to be filtered that comes into contact with the inner surface 32 a of the lower lid 32 is more reliably guided to the flow channel 112 of the jig main body 111 through the inflow port 116. That is, the thickness of the adhesive for bonding the lower lid 32 and the lower end 23c of the filter 23 to each other may vary. Then, the distance between the outlet 18 and the inner surface 32a (including the adhesive) of the lower lid 32 changes according to the thickness of the adhesive. Therefore, it is difficult to manage the distance between the discharge port 18 and the inner surface 32 a (including the adhesive) of the lower lid 32 and to manage the gap between the lower lid 32 and the second end 115. On the other hand, in the jig 110 for discharging the liquid to be filtered according to the present embodiment, the second end 115 is lower when at least a part of the jig main body 111 is inserted into the internal space S2 through the outlet 18. It contacts the inner surface 32a of the lid 32. Further, the inflow port 116 provided at the second end 115 penetrates the jig body 111 from the outside of the flow channel 112 to the inside of the flow channel 112. Therefore, it is possible to secure a certain space (inlet 116) at the second end 115 without managing the gap between the lower lid 32 and the second end 115. As a result, the liquid to be filtered remaining inside the used filter element 10 is more reliably discharged to the outside of the filter element 10.

  Further, since the inflow port 116 is connected to the opening 117 of the second end 115, the inflow having a certain or more opening area in a state where the second end 115 is in contact with the inner surface 32 a of the lower lid 32. 116 can be secured. Thereby, when air is supplied to the injection chamber 12 through the supply port 14, the pressure inside the filter element 10 can be prevented from becoming excessively high.

  Further, as described above, the two inflow ports 116 are provided at symmetrical positions with respect to the center axis CL4 of the jig main body 111. That is, when viewed along the longitudinal direction of the jig main body 111, the two inflow ports 116 are provided at positions facing each other. As a result, the liquid to be filtered existing near the inner surface 32a of the lower lid 32 and the liquid to be filtered that comes into contact with the inner surface 32a of the lower lid 32 are substantially uniformly distributed from the two inflow ports 116 provided at positions facing each other. It is led to the flow path 112 of the jig body 111. As a result, the liquid to be filtered remaining inside the used filter element 10 is more reliably discharged to the outside of the filter element 10.

Next, a filtration device including the filter element device 100 according to the present embodiment will be described with reference to the drawings.
FIG. 8 is a plan view illustrating a filtering device including the filter element according to the present embodiment.
FIG. 9 is a plan view showing the filtering device when viewed from the direction of arrow A2 shown in FIG.
FIG. 10 is a plan view showing the filtering device when viewed from the direction of arrow A3 shown in FIG.
In FIG. 8, the metal processing machine 70 and the dirty liquid tank 80 connected to the filtration device 60 are schematically illustrated for convenience of explanation.

The filtering device 60 illustrated in FIGS. 8 to 10 includes a truck 62, a filter element device 100 mounted on the truck 62, and a pump 64.
The carriage 62 has a handle 81 for a user or a maintenance business operator to push and move the carriage 62, and a caster 66, and can be transported. The cart 62 can be fixed to the installation surface by a floor lock 77 (see FIG. 9) after being transported, for example. As shown in FIG. 8, the carriage 62 has a two-stage structure by having a shelf 68, and a plurality of filter element devices 100 are mounted on the shelf 68. In the filtering device 60 shown in FIGS. 8 to 10, two filter element devices 100 are mounted on the shelf 68 of the carriage 62. 8 to 10, for convenience of description, one of the two filter element devices 100 is represented as a filter element device 100-1, and the other of the two filter element devices 100 is used as the filter element device 100-. It is represented as 2. Further, one of the two filter elements 10 is represented as a filter element 10-1, and the other of the two filter elements 10 is represented as a filter element 10-2. The filter element device 100 is fixed by being sandwiched by the frame 72 of the carriage 62.

  Below the shelf 68, a pump 64 and a power supply unit 65 having a relatively large weight are mounted. The pump 64 can be driven by electric power supplied from the power supply unit 65. In the filtering device 60 of the present embodiment, one pump 64 is provided. For example, as the pump 64, a vacuum pump having a suction amount of 40 L / min, a suction pressure of 3 MPa, and a motor capacity of 0.75 kW is used. A pressure switch 74 is connected to the pump 64. The pressure switch 74 sets the switch to ON (ON) to drive the pump 64 when the pressure becomes lower than the required value, and sets the switch to OFF (OFF) to stop the pump 64 when the pressure becomes higher than the required value. . This prevents breakage of the filter element 10 (such as detachment of the lid 30). The required pressure can be changed, and in the present embodiment, it is set to 2.2 MPa.

  A flexible hose 76 is connected to the upstream side of the pump 64 via a joint 75. An inflexible hard pipe (not shown) is connected to the upstream side of the flexible hose 76. The tip of the hard pipe is inserted into the dirty liquid tank 80. The liquid to be filtered RK containing the contaminants flowing from the metal processing machine 70 is temporarily stored in the contaminated liquid tank 80, and is sucked into the hard pipe. That is, the liquid to be filtered RK in the contaminated liquid tank 80 is sucked by the pump 64 through the hard pipe (not shown) and the flexible hose 76 and sent to the two filter elements 10.

  Specifically, the flexible hose 76 is connected to the pipe 82 via the joint 75. As shown in FIG. 9, the pipe 82 is branched into two pipes 83 and 84 downstream of the pump 64 and the pressure switch 74. The pipe 83 is connected to the supply port 14 of the filter element 10-2. The pipe 84 is connected to the supply port 14 of the filter element 10-1. Each of the two pipes 83 and 84 is detachably connected to the supply port 14 via a flexible tube 67.

  Each of the two pipes 83 and 84 is provided with a pressure gauge 90. The pressure gauge 90 monitors the pressure in the pipes 83 and 84. That is, when impurities such as sludge accumulate in the filter 23 of the filter element 10, the pressure inside the filter element 10 increases. By managing the pressure gauge 90, a user, a maintenance company, and the like can grasp the life and the replacement time of the filter 23.

  A valve 92 is provided upstream of each pressure gauge 90. For example, a user or a maintenance company stops the flow of the liquid to be filtered in each of the pipes 83 and 84 by closing the valve 92 when the pressure gauge 90 fails, without stopping the entire filtration device 60. Only the failed pressure gauge 90 can be replaced. Further, the valve 92 can adjust the flow rate of the liquid to be filtered supplied to the filter element 10.

  As shown in FIG. 10, the liquid to be filtered that has been filtered by the filter element 10 flows through a flexible tube 96 that is detachably connected to the outlet 18 of the upper lid 31, and is discharged to the outside of the filter element 10. The two flexible tubes 96 are connected to one pipe 98. Therefore, the filtered liquids that have flowed through the two flexible tubes 96 and 96 join at the pipe 98. The liquid to be filtered that has flowed through the pipe 98 flows through the flexible tube 99 via a joint 75 that is detachably connected to the pipe 98, and is returned to the metal processing machine 70.

  The user, the maintenance business operator, or the like manages the pressure gauge 90 and stops the power supply unit 65 when confirming that the life of the filter 23 or the replacement time has come. As a result, the driving of the pump 64 stops, and the flow of the liquid to be filtered toward the filter element 10 stops. In addition, a user, a maintenance company, or the like closes the valve 92 and removes the flexible tube 67 from the coupler 33 provided with the supply port 14. At this time, since the valve 92 is closed, the liquid to be filtered can be prevented from leaking from the flexible tube 67. Subsequently, a user or a maintenance company attaches an air injection jig provided with an adjustment valve and a pressure gauge to the coupler 33 provided with the supply port 14. Thereby, for example, the air supplied through the air pipe of the factory where the filtration device 60 is installed can be supplied to the injection chamber 12 through the supply port 14 of the filter element 10 with the pressure adjusted (for example, reduced pressure). become.

  Subsequently, a user, a maintenance company, or the like removes the flexible tube 96 from the coupler 35 provided with the outlet 18. Subsequently, as shown in FIGS. 8 to 10, the user, the maintenance business operator, or the like inserts the discharge jig 110 of the liquid to be filtered into the internal space S <b> 2 (see FIG. 3) through the discharge port 18, and 96 is attached again to the coupler 35 provided with the outlet 18. Then, a user or a maintenance company supplies air to the injection chamber 12 through a jig for air injection and the supply port 14. Thus, a large amount of the liquid to be filtered remaining inside the filter element 10 can be discharged to the outside of the filter element 10 through the flow path 112 of the discharge jig 110. Therefore, the liquid to be filtered 110 according to the present embodiment can easily discharge the liquid to be filtered remaining inside the used filter element 10.

  Thus, a large amount of the liquid to be filtered remaining inside the filter element 10 is returned to the metal working machine 70. Therefore, useless consumption of the liquid to be filtered (the processing liquid used in the metal processing machine 70 in FIGS. 8 to 10) can be suppressed. That is, when a maintenance company or the like transports the filter element with the liquid to be filtered remaining inside the used filter element, the liquid to be filtered remaining inside the filter element is discarded. Then, each time the filter element is replaced, the working fluid used in the metal working machine decreases. Therefore, at a predetermined timing when the filter element is replaced, a user, a maintenance company, and the like need to replenish the working fluid used for the metal working machine. On the other hand, in the filtration device 60 of the present embodiment, since a large amount of the liquid to be filtered remaining inside the filter element 10 is returned to the metal working machine 70, wasteful consumption of the working fluid used in the metal working machine 70 is avoided. Can be suppressed. Further, the labor for replenishing the working fluid used for the metal working machine 70 can be saved.

  In addition, it is preferable that at least one of the discharge jig 110 and the flexible tube 96 is provided with a lift suppressing unit that suppresses the lift of the discharge jig 110. That is, when air is supplied to the injection chamber 12, the pressure inside the filter element 10 increases. Then, the discharge jig 110 may rise through the discharge port 18 and move outward from the internal space S2. In order to suppress such movement of the discharge jig 110, it is preferable that at least one of the discharge jig 110 and the flexible tube 96 is provided with a lifting restraint means for suppressing the lifting of the discharge jig 110. For example, the lifting restraint means may be a filter or a net provided inside the flexible tube 96 to restrain the movement of the first end 113 of the discharge jig 110. Alternatively, for example, the lifting restraint means includes a flange portion provided at the first end 113 of the discharge jig 110, a pressing portion provided at the end of the flexible tube 96 for pressing the flange portion of the first end 113, And the pressing portion of the flexible tube 96 may hold the flange portion of the first end portion 113 when the flexible tube 96 is attached to the coupler 35.

Next, a method for discharging the liquid to be filtered according to the present embodiment will be described with reference to the drawings.
FIG. 11 is a flowchart illustrating a method of discharging a liquid to be filtered according to the present embodiment.
First, when the user or maintenance company confirms that the life of the filter 23 or the replacement time has come, the power supply unit 65 is stopped, the flexible tube 67 is removed from the coupler 33, and the jig for air injection is coupled with the coupler. At the same time, the flexible tube 96 is detached from the coupler 35. This is as described above with reference to FIGS.

  Subsequently, in step S11, the user, the maintenance company, or the like inserts at least a part of the drainage jig 110 for the liquid to be filtered into the internal space S2 through the outlet 18 of the filter element 10. The jig 110 for discharging the liquid to be filtered is as described above with reference to FIGS.

  Subsequently, in step S12, the user, the maintenance company, or the like further inserts the discharge jig 110 into the internal space S2 through the discharge port 18 of the filter element 10, and inserts the first end 113 of the jig main body 111. It is located outside the filter element 10 through the outlet 18. In addition, a user, a maintenance company, or the like positions the other second end 115 of the jig main body 111 near the lower lid 32. Specifically, a user, a maintenance company, or the like causes the other second end 115 of the jig main body 111 to abut on the inner surface 32 a of the lower lid 32. Then, a user, a maintenance company, or the like attaches the flexible tube 96 to the coupler 35 again.

  Subsequently, in step S13, a user, a maintenance company, or the like supplies air to the injection chamber 12 through an air injection jig provided with an adjusting valve and a pressure gauge and a supply port 14 of the filter element 10. Then, the user, the maintenance company, and the like continue to supply air to the injection chamber 12, and use the pressure of the air supplied to the injection chamber 12 to remove the liquid to be filtered remaining inside the filter element 10. It is guided from the second end 115 to the channel 112 of the jig main body 111. More specifically, the liquid to be filtered remaining inside the filter element 10 is guided to the flow path 112 of the jig main body 111 through the inflow port 116 of the jig main body 111 by the pressure of the air supplied to the injection chamber 12. . Then, the user, the maintenance company, and the like continue to supply air to the injection chamber 12 and discharge the liquid to be filtered to the outside of the filter element 10 through the opening 114 of the first end 113 of the jig main body 111.

  According to the method for discharging the liquid to be filtered according to the present embodiment, the amount of the liquid to be filtered remaining inside the filter element 10 is suppressed to a predetermined amount or less, and a large amount of the liquid to be filtered remaining inside the filter element 10 is discharged. It can be discharged to the outside of the filter element 10 through the flow path 112 of the jig 110. Therefore, the method for discharging the liquid to be filtered according to the present embodiment can easily discharge the liquid to be filtered remaining inside the used filter element 10.

  The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment, and various changes can be made without departing from the scope of the claims. The configuration of the above embodiment can be partially omitted or arbitrarily combined so as to be different from the above.

DESCRIPTION OF SYMBOLS 10 ... Filter element, 12 ... Injection chamber, 13 ... Handle, 14 ... Supply port, 18 ... Discharge port, 20 ... Filter part, 23 ... Filter, 23b ... -Upper end part, 23c ... Lower end part, 24 ... Folded part, 24a ... Pleated line, 26 ... Partition plate, 26a ... Through hole, 26b ... Flow path part, 30. ..Lid body, 30a ... inner side surface, 31 ... upper cover, 32 ... lower cover, 32a ... inner surface, 33 ... coupler, 34 ... nut, 35 ... coupler, 36 ... Nut, 37 ... Opening, 40 ... Housing, 40a ... Inner surface, 40b ... Outer side surface, 50 ... Connected body, 52 ... Metal body, 55 ... Pressure release section, 60: filtration device, 62: trolley, 64: pump, 65 ... Power supply part, 66 ... caster, 67 ... flexible tube, 68 ... shelf, 70 ... metal working machine, 72 ... frame, 74 ... pressure switch, 75 ... joint Part, 76: flexible hose, 77: floor lock, 80: contaminated liquid tank, 81: handle, 82, 83, 84: pipe, 90: pressure gauge, 92 ...・ Valve, 96 ・ ・ ・ Flexible tube, 98 ・ ・ ・ Piping, 99 ・ ・ ・ Flexible tube, 100 ・ ・ ・ Filter element device, 110 ・ ・ ・ Discharge jig, 111 ・ ・ ・ Jig body, 112 ・ ・・ Flow path, 113 ・ ・ ・ First end, 114 ・ ・ ・ Opening, 115 ・ ・ ・ Second end, 116 ・ ・ ・ Inlet, 117 ・ ・ ・ Opening, CL1, CL2, CL3, CL4 ... Center axis, L · · · imaginary line, RK · · · the filtrate, S1 · · · space, S2 · · · interior space, S3 · · · inner region

Claims (5)

A filter element for filtering the liquid to be filtered discharged from the metal working machine,
A jig for discharging a filtrate to be used when the filtrate to be filtered remaining inside the filter element is discharged to the outside of the filter element,
With
The filter element comprises:
A filter unit arranged to surround an injection chamber into which the liquid to be filtered is injected, and receiving and filtering the liquid to be filtered from the inside,
A first lid connected to an upper end of the filter unit, a supply port for guiding the filtrate to be discharged from the metal working machine to the injection chamber, and the filtrate to be passed through the filter unit. A first lid having an outlet for guiding the filter element to the outside of the filter element,
A second lid connected to a lower end of the filter unit;
A housing connected to the first lid and the second lid and surrounding the filter unit, and forming an internal space communicating with the outlet outside the filter unit;
Has,
The discharge jig has a flow path through which the liquid to be filtered flows inside, and extends from the first lid to the second lid in a state where at least a part thereof is inserted into the internal space through the discharge port. It has a cylindrical jig body,
One first end of the jig body is located outside the filter element through the outlet in a state where at least a part of the jig body is inserted into the internal space through the outlet,
The other second end of the jig body is located near the second lid in a state where at least a part of the jig body is inserted into the internal space through the discharge port,
When air is supplied to the injection chamber through the supply port, the liquid to be filtered remaining inside the filter element is guided from the second end to the flow path by the pressure of the air, and A filter element device, wherein the filter element is discharged to the outside of the filter element through an opening at an end. The second end portion contacts the inner surface of the second lid in a state where at least a part of the jig main body is inserted into the internal space through the discharge port, and the flow path is provided from outside the flow path. The filter element device according to claim 1 , further comprising an inflow port penetrating the jig main body through the inside of the filter element. The inlet, the filter element arrangement of claim 2, characterized in that connected to the opening of the second end. The second end has two of the inlets;
The two inlets, the filter element according to claim 2 or 3, characterized in that provided at positions symmetrical with respect to the center axis extending along the longitudinal direction of the jig main body. A method for discharging a liquid to be filtered, which discharges the liquid to be filtered remaining inside a filter element for filtering a liquid to be filtered discharged from a metal working machine to the outside of the filter element,
The filter element comprises:
A filter unit arranged to surround an injection chamber into which the liquid to be filtered is injected, and receiving and filtering the liquid to be filtered from the inside,
A first lid connected to an upper end of the filter unit, a supply port for guiding the filtrate to be discharged from the metal working machine to the injection chamber, and the filtrate to be passed through the filter unit. A first lid having an outlet for guiding the filter element to the outside of the filter element,
A second lid connected to a lower end of the filter unit;
A housing connected to the first lid and the second lid and surrounding the filter unit, and forming an internal space communicating with the outlet outside the filter unit;
A filtration unit with
A step of inserting at least a part of a discharge jig for a filtrate to be filtered provided with a cylindrical jig main body having a flow passage through which the filtrate flows inside the internal space through the discharge port;
In a state where at least a part of the discharge jig is inserted into the internal space through the discharge port, while positioning a first end of the jig main body outside the filter element through the discharge port, Positioning the other second end of the jig body near the second lid;
Air is supplied to the injection chamber through the supply port, and the liquid to be filtered remaining inside the filter element is guided from the second end to the flow path by the pressure of the air, and the opening of the first end is opened. Discharging the filter element out of the filter element through a portion,
A method for discharging a liquid to be filtered, characterized by comprising:

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