JP4949932B2 - Cleaning nozzle and cleaning device - Google Patents

Description

The present invention relates to a cleaning nozzle and a cleaning device for cleaning a cylindrical filter element, and sprays cleaning water such as tap water onto the filter element in the form of a shower, thereby causing dirt, foreign matter, etc. adhering to the filter element. The present invention relates to a cleaning nozzle and a cleaning device.

  In the field of food processing, for example, various beverage foods are processed from fruit juice obtained by squeezing fruits, milk, and the like. When liquid food materials such as fruit juice and milk are mixed with solids such as fibers, solidified solid components, and foreign substances originally attached to the fruit, it is necessary to process high-quality beverage foods. It becomes a problem. Therefore, in order to filter out these foreign substances and the like from the liquid food material, the food processing machine is provided with a strainer, that is, a filter element. As is well known in the art, such a filter element has a hollow cylindrical shape with one opening, and the bottom surface and circumferential surface of the cylinder are filtration surfaces. The filtration surface is composed of a fine metal mesh, a metal plate with many fine holes, and the like. The filter element configured in this way is attached as a line strainer in the middle of piping, for example. Foreign matters and the like are filtered out by this filter element, and a high quality liquid food material or liquid food is obtained.

  Such a filter element for food processing is regularly cleaned for maintaining the performance as a filter medium and for hygiene reasons, and the adhered foreign matters and dirt are removed. In cleaning, a cylindrical filter element removed from the food processing machine is inserted with a cleaning nozzle from the opening, and cleaning water is sprayed onto the inner peripheral wall of the filter element to remove foreign matters. For such cleaning, a cleaning nozzle provided with one injection hole or nozzle hole is used. In order to perform cleaning with one nozzle hole, the shape of the nozzle hole is such that the cleaning water spreads in a circular shape, or the cleaning water spreads in an elliptical shape that is flattened in the vertical and horizontal directions. As a result, the cleaning water is injected into a predetermined range of the inner peripheral wall of the filter element. At this time, the cleaning nozzle is rotated, or the cleaning nozzle is moved back and forth in the axial direction of the filter element, so that the cleaning water is sprayed onto the inner peripheral wall of the filter element.

  By the way, it is difficult to remove minute foreign substances clogged by fine meshes or the like formed in the metal mesh of the filter element or many metal plates unless a relatively strong water pressure directly acts on the foreign substances. Since the cleaning water sprayed from the conventional cleaning nozzle spreads in a planar shape as described above, the water pressure directly hitting the foreign matter is lowered and cannot be sufficiently cleaned. Therefore, the cleaning water sprayed from the cleaning nozzle is squeezed so that the cleaning water does not spread too much, or the supplied cleaning water is sprayed under a high pressure in advance.

JP 2005-2111779 A

  Although it is not a direct document of the present invention, Patent Document 1 describes a bottle cleaning nozzle. As shown in FIG. 5, the bottle cleaning nozzle 60 has one first injection hole 61 opened in the axial direction at the tip of the nozzle and a slight angle with the axial direction in the vicinity of the tip of the nozzle. And the four second injection holes 62, 62,... Opened in the vicinity of the shoulder of the nozzle, and the four third injection holes 63, 63,. It is made up of. Since the cleaning water sprayed from each of the spray holes 61, 62, 63,... Is sprayed in a bar shape or a needle shape and does not spread, the water pressure of the sprayed cleaning water acts on the object to be cleaned without decreasing. Therefore, when the cleaning nozzle 60 described in Patent Document 1 is applied to the cleaning of the filter element, it is considered that foreign matters clogged in the mesh of the filter element are removed to some extent.

  Although the filter element can be cleaned with a conventionally known cleaning nozzle as described above, there are various drawbacks. For example, in order to ensure the water pressure of the cleaning water, if the sprayed cleaning water is restricted so as not to spread, the range that can be cleaned at a time becomes narrow. Since the cleaning range becomes narrow, there is a problem that it takes time to clean the inside of the filter element thoroughly and the working efficiency is poor. Also, if the washing water sprayed to increase work efficiency is widened, the supply pressure of tap water alone is not sufficient, and a pressurizing device such as a pressurizing pump is required to secure a predetermined water pressure. Thus, the cleaning apparatus is not only enlarged, but also expensive.

  On the other hand, when the bottle cleaning nozzle 60 described in Patent Document 1 is applied to the cleaning of the filter element, as described above, the cleaning water sprayed from the spray holes 61, 62, 63,. In this case, the water pressure of the sprayed cleaning water does not decrease, but the range to be cleaned is limited because the number of spray holes is small. As a result, the range that can be cleaned at one time becomes narrow, and the work efficiency is poor.

  One of the advantages of the bottle cleaning nozzle 60 described in Patent Document 1 is that the cleaning water is jetted in a rod shape or needle shape, and the water pressure of the jetted cleaning water does not drop. It is conceivable that a large number of thin tubular injection holes are opened and the washing water is injected in a shower shape. With this improvement, the area to be cleaned becomes wider. However, as will be described below, in the case of a thin tubular injection hole having a constant inner diameter, another problem arises in that the injected water pressure decreases due to pressure loss due to the tube wall friction of the injection hole itself.

Hereinafter, the reason why the water pressure decreases in a thin tubular injection hole having a constant inner diameter will be described with reference to FIG. FIG. 6 shows a cross section of one injection hole of a thin tubular injection hole opened in the nozzle. The nozzle 50 has an injection hole 51 having a constant inner diameter from the inner surface 50a toward the outer surface 50b. Inside diameter _{d 0} of the injection hole 51, such that the washing water is injected into the needle, for example, become a size of 0.3 to 1.0 mm. Since the flow rate of the cleaning water to be injected is about several meters per second, the cleaning water becomes a laminar flow on the inner surface side 50 a of the injection hole 51. In the laminar flow flowing through the tubular injection hole 51 having a constant inner diameter, a pressure loss of water pressure occurs in the length direction of the injection hole 51 due to tube wall friction. Since losses water pressure is inversely proportional to the square of the inner diameter of the injection hole 51, when the injection holes 51 of such small pore sizes, water pressure loss over the length L ₀ of the injection hole 51 can not be ignored. To reduce the pressure loss, it is considered that the nozzle wall thickness thinner by reducing the length L ₀ of the injection hole 51, is another problem that the strength of the nozzle itself Thinning is durability drops decreases Arise.

  The present invention is intended to provide a cleaning nozzle and a cleaning apparatus that solve the above-mentioned problems or disadvantages. Specifically, it can clean a wide area at a time, and the cleaning work efficiency is high. Regardless, high-pressure water is not particularly required, in other words, a sufficient cleaning effect can be obtained only by the supply pressure of tap water, and the nozzle itself has sufficient strength and high durability, and a cleaning nozzle and a cleaning device are provided. The purpose is that.

In the present invention, in order to achieve the above object, the injection hole of the cleaning nozzle is tapered from the inlet toward the outlet. That is, the cleaning water is sprayed from the cleaning water source side toward the cleaning target, but the cross-sectional shape of the injection hole is large on the cleaning water source side, small on the cleaning target side, and is configured to be tapered as a whole. The Moreover, the planar shape of the injection hole is configured to be circular or rectangular. These injection holes are formed by an electron beam drilling machine or a laser drilling machine. The cleaning nozzle according to the present invention is applied to cleaning a cylindrical filter element, and the cleaning nozzle is configured to include a cylindrical portion having a predetermined length in the axial direction. The cylindrical portion is formed with a plurality of injection holes in one or more rows in the axial direction.

  As described above, the cleaning nozzle applied to the cleaning of the filter element is configured to be driven to rotate inside the cylindrical filter element. That is, the filter element cleaning apparatus includes a cleaning nozzle, a cleaning water supply pipe, and an electric motor that integrally rotates the cleaning nozzle and the cleaning water supply pipe at a controlled speed. The washing nozzle is housed in a removable cover, and the washing water supply pipe and the electric motor are housed in a housing. The cleaning nozzle is configured to have a cylindrical portion, and a plurality of injection holes are formed in the cylindrical portion in one or more rows in the axial direction. These injection holes are also tapered. In addition, a spacer whose height can be adjusted is applied so that it can be applied to filter elements having various lengths in the axial direction.

That is, the invention according to claim 1 is a cleaning nozzle for removing foreign matter, dirt, etc. adhering to a cylindrical filter element in order to achieve the above object , It consists of a cylindrical part with a diameter smaller than the diameter of the filter element, and the cylindrical part is formed with a plurality of injection holes for injecting cleaning water in a row in the axial direction, and the filter element is attached, The plurality of injection holes are tapered in diameter toward the outlet side to be injected, and the foreign matter adhering to the filter element without the pressure being reduced because the cleaning water is injected in a needle shape, The cleaning nozzle is configured to act on dirt and the like.
Invention according to claim 2, in the cleaning nozzle according to claim 1, wherein the injection hole has a plane shape is circular or rectangular, it is formed by electron beam hole processing machine.

The invention according to claim 3 is a controlled speed of the cleaning nozzle, the cleaning water supply pipe connected to the cleaning nozzle through the rotary joint to supply the cleaning water, and the cleaning nozzle and the cleaning water supply pipe. The cleaning nozzle is housed in a detachable cover, the cleaning water supply pipe and the electric motor are housed in a housing, and the cleaning nozzle is disposed in the axial direction. The cylindrical portion has a predetermined length, and the cylindrical portion is formed with a plurality of injection holes that are tapered in a taper shape from the inner peripheral surface toward the outer peripheral surface. The diameter of the cylindrical portion is smaller than the diameter of the cylindrical filter element that is the object to be cleaned, and the filter element is mounted on the cylindrical portion for cleaning, and the cleaning water sprayed from the spray hole Is injected into needles Foreign matter force is attached to the filter element without reducing configured as a cleaning device, characterized in that is adapted to act on the dirt.
According to a fourth aspect of the present invention, in the apparatus according to the third aspect , the injection holes are formed by an electron beam hole drilling machine over a plurality of rows, and the invention according to the fifth aspect is according to the third or fourth aspect . In this apparatus, the filter element is mounted on the cylindrical portion of the cleaning nozzle through a height-adjusting tubular spacer for cleaning.

  As described above, according to the present invention, since the cleaning nozzle has a plurality of injection holes, the cleaning water can be sprayed over a wide range at a time, and the cleaning work efficiency is increased. At this time, since the injection hole is tapered from the water purification source side toward the object to be cleaned, the cleaning water is injected in a needle shape, and the pressure of the injected cleaning water does not decrease. Acts directly on dirt, etc. That is, the washing water is not only smoothly accelerated and ejected, but also the pressure loss due to the tube wall friction of the injection hole is small, and the pressure loss due to the tube wall friction becomes smaller in inverse proportion to the square of the inner diameter of the injection hole. Although it becomes large, since the injection hole is formed in a tapered shape, the length of the injection hole in the small diameter portion is short and the pressure loss is small. As a result, an effect peculiar to the present invention can be obtained in that it can be sufficiently washed by the supply pressure of inexpensive tap water despite the fact that a plurality of injection holes are opened. Further, since it is not necessary to reduce the wall thickness of the cleaning nozzle in order to reduce the pressure loss of the injection hole, it is possible to provide a cleaning nozzle having sufficient strength and durability. Further, according to another invention, since the injection hole is formed by the electron beam hole processing machine, an effect that it can be formed at low cost from a thick material is also obtained. Furthermore, according to the invention of the cleaning device, the cylindrical filter element can be cleaned, but also at this time, the effects specific to the present invention as described above can be obtained.

  Hereinafter, the example which implemented the washing nozzle concerning an embodiment of the invention as a nozzle for washing of a filter element is explained. FIG. 1 is a side view showing a cleaning device 10 for a filter element, to which a cleaning nozzle 1 according to an embodiment of the present invention is attached. The cleaning device 10 is roughly configured by a cleaning water supply unit that supplies tap water, a cleaning unit that jets the supplied cleaning water to clean the filter element, a drainage unit that discharges the drained water after cleaning to the outside of the device, and the like. These are incorporated in the housing as described below.

  As shown in FIG. 1, the casing is a first casing K1 that is installed in the work area and serves as a base of the entire apparatus, and a second casing K2 that is attached to the first casing 1. It is composed of By changing the mounting position of the second casing K2 to the first casing K1, the height of the entire apparatus can be freely adjusted. Inside the second housing K2, three horizontal first to third tables T1, T2, and T3 are provided at predetermined intervals in the vertical direction. The periphery of the third table T3 located in the lowermost layer and the second table 2 located in the middle are liquid-tightly fixed to the peripheral wall of the second casing K2, but the second table 2 located in the uppermost layer The first table T1 is supported on the second table T2 by support members 17 and 17, and a gap having a predetermined width is provided between the periphery of the first table T1 and the peripheral wall of the second casing K2. ing. Therefore, when the cylindrical cover C opened at the lower side is covered from the top of the second casing K2 with the opening facing down, the lower end of the peripheral wall of the cover C becomes the first table T1 and the second casing K2. The cover C is detachably attached to the second casing K2.

  The cleaning water supply unit includes a cleaning water supply pipe 11, a rotary joint 15, a water supply pipe 16, and the like. According to the present embodiment, the tap water is directly supplied to the cleaning water supply pipe 11 without using a pressurizing device such as a pressurizing pump. An opening / closing valve, a water pressure gauge 18 and the like are attached to the cleaning water supply pipe 11 and inserted into the cleaning device 10 through a hole opened in the peripheral wall of the second casing K2. The washing water supply pipe 11 is connected to a water supply pipe 16 via a rotary joint 15. The upper end portion of the water supply pipe 16 is passed through a hole opened in the center of the second table T2 so as to penetrate the second table T2. According to the present embodiment, the water supply pipe 16 is rotationally driven at a rotational speed controlled by the electric motor 14 provided in the motor chamber below the third table T3. Since the cleaning water supply pipe 11 is connected to the water supply pipe 16 via the rotary joint 15, even if the water supply pipe 16 is rotationally driven by the electric motor 14, the cleaning water is continuously supplied from the cleaning water supply pipe 11. can do. Since the gap between the central hole of the second table T2 and the water supply pipe 16 is blocked by the rotatable shield 19, the wash water is placed below the gap between the hole of the second table T2 and the water supply pipe 16. It will not leak into the room.

  The cleaning nozzle mounting portion 12 is provided at the upper end portion of the water supply pipe 16, that is, the portion protruding above the second table T <b> 2 of the water supply pipe 16. A male screw is formed on the outer peripheral portion of the cleaning nozzle mounting portion 12.

  In the embodiment of the present invention, the cleaning unit is composed of a cylindrical cleaning nozzle 1. Since a mounting portion 2 is provided at the lower end or the open end of the cylindrical cleaning nozzle 1 as will be described later, the cleaning nozzle 1 has a predetermined size opened at the center of the first table T1. It is possible to connect to the above-described cleaning nozzle mounting portion 12 by being inserted so as to penetrate the hole. As described above, since the water supply pipe 16 is rotationally driven by the electric motor 14, the cleaning nozzle 1 is also rotationally driven integrally with the water supply pipe 16.

  The drainage part is composed of a drain pipe 13. One of the drain pipes 13 is inserted into the cleaning device 10 through a hole opened in the peripheral wall of the second casing K2, and opens to the surface of the second table T2, and the other is shown in the drawing outside the cleaning device 10. It is connected to an untreated wastewater treatment facility. The drain pipe 13 is also provided with an open / close valve or the like, but is not shown in FIG.

  Next, the cleaning nozzle according to the embodiment of the present invention will be described. The cleaning nozzle 1 according to the first embodiment of the present invention is shown in the perspective view of FIG. The cleaning nozzle 1 includes a hollow elongated cylindrical portion 3 having a length of about 100 mm opened on one side and a wide ring-shaped mounting portion 2 attached to the opened end portion. A female screw is formed on the inner peripheral surface of the mounting portion 2 and is screwed into a male screw provided in the cleaning nozzle mounting portion 12 of the cleaning device 10 described above.

  A plurality of small diameter injection holes 4, 4,... Are opened in two rows in the axial direction on the peripheral wall of the cylindrical portion 3 of the cleaning nozzle 1. FIG. 2A is a development view of the cylindrical portion 3. As shown in the development view, the first row of injection holes 4, 4,... Are arranged at a predetermined interval h in the axial direction. The second row of injection holes 4, 4,... Are also opened at the same interval h, but are shifted in the axial direction by half of the interval h with respect to the first row of injection holes 4, 4,. ing. For example, 183 injection holes are formed per row. The interval hw between the first row and the second row in which such injection holes 4, 4,... Are formed is such that the cleaning water injected from these injection holes 4, 4,. It has become.

  As described above, according to the present embodiment, the first row of injection holes 4, 4,... And the second row of injection holes 4, 4,. In addition, since the first row and the second row are arranged at an interval “hw”, the cleaning water sprayed from these spray holes 4, 4,... Does not interfere with each other. In addition, according to the present embodiment, the first row of injection holes 4, 4,... And the second row of injection holes 4, 4,. Therefore, when the cleaning nozzle 1 is driven to rotate, the injection holes 4, 4,... Are apparently opened at intervals of “1/2 · h”. Thereby, the effect which can be washed densely is acquired.

  FIG. 3A is a cross-sectional view schematically showing one injection hole 4 according to the first embodiment as described above. As shown in this cross-sectional view, the injection hole 4 is reduced in diameter in a tapered shape from the inner peripheral surface 3a of the cylindrical portion 3 of the cleaning nozzle 1 toward the outer peripheral surface 3b, that is, radially outward. ing. According to the present embodiment, the thickness of the cylindrical portion 3 is, for example, 2.85 mm, the inner diameter d1 on the inner peripheral surface 3a side of the injection hole 4 is 0.77 mm, and the inner diameter d2 on the outer peripheral surface 3b side is 0.8. 54 mm is selected.

  Next, a usage example of the cleaning nozzle 1 according to the embodiment of the present invention will be described. As shown in FIG. 1 as a preparation step, the mounting portion 2 of the cylindrical cleaning nozzle 1 according to the first embodiment of the present invention is mounted on the cleaning nozzle 10 on the cleaning nozzle mounting portion 12. A tubular spacer 20 having a predetermined length selected according to the length of the filter element to be cleaned is mounted on the first table T1. Next, the filter element 21, which is an object to be cleaned, is mounted so as to cover the cleaning nozzle 1, and its lower end is attached to the spacer 20. Then, the cover C is covered from above to prevent the washing water from being scattered, and is attached to the second casing K2. This completes the preparation process.

  Tap water, that is, cleaning water is supplied from the cleaning water supply pipe 11. Then, the cleaning water reaches the cleaning nozzle 1 through the rotary joint 15, the water supply pipe 16, and the like, and is sprayed from the plurality of injection holes 4, 4,. The sprayed cleaning water hits the inner wall of the filter element 21 in a vertically long band shape. The number of rotations of the electric motor 14 is controlled by an inverter or the like not shown in the figure, and the water supply pipe 16 is slowly rotated. Then, the cleaning nozzle 1 also rotates, and the sprayed cleaning water hits the inner wall of the filter element 21 without any problem. The washing water sprayed in a shower shape directly acts on foreign matter, dirt, etc. clogged in the mesh of the filter element 21 to remove the foreign matter. Washing water containing foreign matter, that is, drainage H, is once received on the first table T1, flows around the first table T1, and is second from the gap between the peripheral portion of the first table T1 and the cover C. On the table T2. The fallen drainage H is collected on the second table T2 and discharged from the drainage pipe 13 to the outside. The cover C is removed, and the filter element 21 that has been cleaned is taken out. Thereafter, the next filter element 21 is washed in the same manner.

  As described above, according to the present embodiment, the pressure can be washed with low-pressure tap water such as 0.5 MPa. The reason will be described. FIG. 4 schematically shows a cross section of one injection hole 4 and the cleaning water to be injected. Since the inner diameter d1 of the injection hole 4 of the cleaning nozzle 1 is relatively large on the inner peripheral surface 3a side as described above, the flow velocity v1 of the cleaning water in the vicinity of the inner peripheral surface 3a side is relatively small. However, since the inner diameter d2 on the outer peripheral surface 3b side of the injection hole 4 is relatively small, the washing water flow velocity v2 in the vicinity of the outer peripheral surface 3a side is large. Thus, according to this Embodiment, since the injection hole 4 is diameter-reduced in the taper shape, washing water is smoothly accelerated and injected.

Next, the in-hole resistance in the injection hole 4 will be considered. If the flow velocity v2 of the cleaning water to be jetted is 3 m / s, for example, the kinematic viscosity coefficient of water at 10 ° C. is ν = 0.103 cm ² / sec. The Reynolds number Re of water is given by
Re = v2 × d2 / ν = 1246
Therefore, since the critical Reynolds number Rc = 2300 is smaller, it can be seen that the flow is laminar inside the injection hole 4. In the case of laminar flow, it is known that the pressure loss due to the resistance in the pipe is proportional to the average flow velocity and inversely proportional to the square of the inner diameter. In the injection hole having a constant inner diameter d ₀ as shown in FIG. 6, the flow velocity v ₀ is also constant and the pressure loss is large over the entire length L ₀ of the injection hole, whereas the cleaning according to the embodiment of the present invention is performed. The injection hole 4 of the nozzle 1 has only a part of the injection hole 4 where the inner diameter is small. The vicinity of the inner wall 3a of the cleaning nozzle 1 has a large inner diameter and a small flow velocity v1, so the pressure loss over the entire length L of the injection hole is Relatively few. Therefore, even with a tap water supply pressure of about 0.5 MPa, the water pressure of the cleaning water injected from the injection holes 4, 4,.

  The injection holes 4, 4,... According to the embodiment of the present invention are conventionally known electron beam processing machines or electron beam hole processing machines as disclosed in Japanese Patent Application Laid-Open No. 2001-110307. Can dawn. When the injection hole is processed while shifting the focus position of the electron beam up and down in the thickness direction of the metal plate, the injection holes 4, 4,... Are tapered in the metal plate. When the metal plate on which the injection holes are processed is wound into a cylindrical shape and the joint is welded, the cylindrical portion 3 of the cleaning nozzle 1 is obtained.

  Next, a cleaning nozzle according to a second embodiment of the present invention will be described. The overall shape of the cleaning nozzle is substantially the same as that of the cleaning nozzle 1 according to the first embodiment, but the shape of the injection holes 4 ′, 4 ′,... For injecting cleaning water is the same as that of the first embodiment. It is different from the injection holes 4, 4,. FIG. 3 (a) shows one injection hole 4 'according to the second embodiment of the present invention. As shown in the drawing, according to the second embodiment, the injection hole 4 'is configured as a slot-like injection hole 4' having a rectangular planar shape. This slot-shaped injection hole 4 ′ is also formed as a tapered hole, and the rectangular area on the inner peripheral surface 3 a side is larger than that on the outer peripheral surface 3 b side, and is formed in a tapered shape as a whole. For example, the size of the rectangle on the outer peripheral surface 3b side is formed such that the width a = 0.15 to 0.5 mm and the length b = 2 to 5 mm. Also in the cleaning nozzle according to the second embodiment, the injection holes 4 ′, 4 ′,... Are formed in a tapered shape so as to become smaller in the direction of jetting. The same effect as that of the present embodiment can be obtained and the same effect can be obtained.

  The present invention is not limited to the above embodiment and can be implemented in various forms. For example, it is obvious that the diameter of one injection hole to be injected is not limited to the above-described diameter, and can be implemented with a diameter of 0.3 to 1.0 mm or more. The rows of the injection holes 4, 4,... Opened in the cylindrical portion 3 of the cleaning nozzle 1 can be implemented in one row or three or more rows, and the number of the injection holes 4, 4,. . Further, the length of the cleaning nozzle 1 can be changed, or the shape of the cleaning nozzle can be changed to implement a convex nozzle such as a shower nozzle provided in a bathroom, for example. It is clear that the same effect can be obtained even if implemented in this way. It is also clear that high-pressure water can be applied to the cleaning nozzle according to the embodiment of the present invention. Furthermore, although it has been described that the injection hole of the cleaning nozzle can be opened by an electron beam drilling machine, it can also be opened by a laser drilling machine.

  Although many injection holes are opened, the pressure loss due to the injection holes is small and the cleaning ability is high. Therefore, the present invention can be applied to cleaning other than cleaning of the filter element. Furthermore, not only cleaning water but also a cleaning solvent can be injected.

It is a side view which shows typically the washing | cleaning apparatus for filter elements to which the washing nozzle which concerns on embodiment of this invention is attached. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows typically the washing | cleaning nozzle which concerns on the 1st Embodiment of this invention, The (a) is a perspective view of a washing nozzle, The (a) is a perspective view which expand | deploys the washing nozzle in plate shape. is there. It is a figure which shows the injection hole opened to the washing nozzle which concerns on embodiment of this invention, The (a) is a perspective view which shows 1st Embodiment and the (a) shows 2nd Embodiment typically, respectively. FIG. It is sectional drawing for demonstrating the effect | action of the injection hole opened to the washing nozzle which concerns on embodiment of this invention. It is sectional drawing which shows the nozzle for bottle washing | cleaning of patent document 1 typically. It is sectional drawing for demonstrating the effect | action of the conventionally well-known injection hole opened to the washing nozzle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing nozzle 3 Cylindrical part 4, 4 'Injection hole 11 Washing water supply pipe 20 Spacer 21 Cylindrical filter element C Cover K1, K2 Case

Claims (5)

A cleaning nozzle for removing foreign matter, dirt, etc. adhering to the cylindrical filter element,
  The cleaning nozzle includes a cylindrical portion having a diameter smaller than the diameter of the filter element, and a plurality of injection holes for injecting cleaning water are formed in a row in the axial direction, and the filter element is mounted. And
  The plurality of injection holes are tapered in diameter toward the outlet side to be injected, and the foreign matter adhering to the filter element without the pressure being reduced because the cleaning water is injected in a needle shape, A cleaning nozzle characterized by acting on dirt and the like. The cleaning nozzle according to claim 1 , wherein the injection hole has a circular or rectangular planar shape and is formed by an electron beam hole processing machine. A cleaning nozzle, a cleaning water supply pipe connected to the cleaning nozzle through a rotary joint to supply cleaning water, and an electric motor that rotationally drives the cleaning nozzle and the cleaning water supply pipe at a controlled speed. ,
The cleaning nozzle is a detachable cover, and the cleaning water supply pipe and the electric motor are stored in a housing,
The cleaning nozzle includes a cylindrical portion having a predetermined length in the axial direction, and the cylindrical portion has a plurality of injection holes that are tapered in diameter from the inner peripheral surface toward the outer peripheral surface in a row in the axial direction. And the diameter of the cylindrical part is smaller than the diameter of the cylindrical filter element that is the object to be cleaned, and the filter element is mounted on the cylindrical part and cleaned .
Washing water ejected from the ejection holes is ejected in a needle shape and acts on foreign matter, dirt, etc. adhering to the filter element without reducing pressure . 4. The cleaning apparatus according to claim 3 , wherein the spray holes are formed by an electron beam hole processing machine over a plurality of rows. 5. The apparatus according to claim 3 , wherein the filter element is mounted on a cylindrical portion of the cleaning nozzle via a tubular spacer for height adjustment and is cleaned. Cleaning device.

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