JP4891875B2 - Pump device - Google Patents

Description

  The present invention relates to a pump device provided with a revolving spring filter.

  A spring filter in which a spring-like filter element is arranged at the center of a filter casing is known (see, for example, Patent Document 1).

  In the filter element of this spring filter, a filtration gap is formed between adjacent spiral portions of a series of metal filter media that are formed in a coil shape and are extendable.

In the conventional spring filter, a liquid inlet is provided in the lower part of the filter casing, and a liquid discharge port of a pump is connected to the liquid inlet. On the other hand, the liquid suction port of the pump sucks liquid into the pump after filtering sludge in the liquid with a filter paper filter or cloth filter in the liquid tank in order to protect the pump.
Japanese Patent Laying-Open No. 2006-102589 (first page, FIG. 1)

  The filter paper filter or cloth filter on the pump suction side is not easy to maintain, and when clogged with sludge, the flow is stopped and it takes time and labor to clean or replace the filter, and there is also a problem that the running cost increases. is there.

  The present invention has been made in view of these points, and an object of the present invention is to provide a pump device that can easily maintain a filter required for sludge removal on the pump suction side and does not require running costs.

The invention according to claim 1 includes a filter casing provided with a liquid inlet in a tangential direction of a circular horizontal section, and a spring-like filter element disposed in the center of the filter casing and provided with a liquid outlet above. A swirl spring filter, a swirl pump connected to the liquid outlet of the swirl spring filter , and capable of reversing the liquid by reversing ; and a lower part of the filter casing of the swirl spring filter. The pump device includes a sludge pot for a spring filter that is connected and accumulates sludge separated from the liquid by a revolving spring filter.

According to a second aspect of the present invention, in the pump device according to the first aspect, the liquid inlet connected to the liquid discharge port of the vortex pump is provided in the tangential direction of the circular horizontal cross section of the conical filter casing. A cyclone filter provided with a liquid outlet pipe in the upper center, and a cyclone filter sludge pot connected to the lower part of the conical filter casing in the cyclone filter and collecting sludge separated from the liquid by the cyclone filter. Is.

  According to a third aspect of the present invention, there is provided a series of metal filter media in which the spring-like filter element in the pump device according to the first or second embodiment is formed in a coil shape so as to be stretchable and an adjacent spiral portion of the metal filter media A filtration gap formed between them is set to a minimum by a force urged in the compression direction at the time of filtration, and is enlarged by a backwash liquid pressure supplied into the metal filter medium at the time of backwashing.

According to the first aspect of the present invention, the sludge in the liquid separated from the liquid by the spring-like filter element connected to the liquid suction port of the vortex pump that can reversely flow the liquid by reversing, Since it settles in the filter casing and falls into the sludge pot for the spring filter, the filter element required for sludge removal on the pump suction side is easy because the spring-like filter element can be backwashed by reversing the vortex pump. A pump device that does not require running costs can be provided. In particular, in a swivel spring filter having a filter casing provided with a liquid inlet in a tangential direction of a circular horizontal cross section, sludge in the liquid is swung along with the liquid by the swirl spring filter, along the inner wall surface of the filter casing. Therefore, the spring-like filter element is hardly clogged and the frequency of backwashing can be reduced.

  According to the second aspect of the present invention, after removing coarse sludge from the liquid by the swirling spring filter on the pump suction side, it is possible to supply the liquid from which fine sludge has been removed by the cyclone filter on the pump discharge side. At that time, even in the cyclone filter, the sludge that settles with its own weight along the inner wall of the filter casing while swirling with the liquid in the filter casing falls into the cyclone filter sludge pot, so that fine sludge is also reliably separated from the liquid. Can be removed.

  According to the third aspect of the present invention, in the filter element provided with a coiled metal filter material so as to be stretchable, the filtration gap formed between adjacent spiral portions of the metal filter material is urged in the compression direction during filtration. The sludge can be reliably removed by the metal filter medium and the filtration gap between the spiral parts of the metal filter medium is enlarged by the backwash liquid pressure supplied into the metal filter medium. Therefore, the clogged sludge from the metal filter medium can be reliably backwashed and separated.

  The present invention will be described below with reference to one embodiment shown in FIGS. 1 to 4 and another embodiment shown in FIG.

  FIG. 1 shows an outline of a pump device. The pump device includes a reversible vortex pump 11, a swirl spring filter 12 connected to a liquid suction side of the vortex pump 11, and a swirl spring filter 12. Spring filter sludge pot 13 connected to the lower part, cyclone filter (vortex dynamic filter) 14 connected to the liquid discharge side of the vortex pump 11, and cyclone filter sludge pot connected to the lower part of the cyclone filter 14 15 is integrally formed by a frame or the like (not shown).

  The revolving spring filter 12 includes a filter casing 22 provided with a liquid inlet 21 in a tangential direction of a circular horizontal cross section, and a spring-like filter element disposed at the center of the filter casing 22 and provided with a liquid outlet 23 above. 24, a liquid suction port 26 of the vortex pump 11 is connected to the liquid outlet 23 of the swirl type spring filter 12 via a pipe 25, and a sludge dropping port 27 is formed at the lower part of the filter casing 22. Is provided.

  A sludge pot 13 for a spring filter that collects sludge S1 separated from the liquid by the swirl type spring filter 12 is connected to the sludge drop opening 27 of the swirl type spring filter 12 via the upper on-off valve 31. A lower opening / closing valve 33 is provided in the lower discharge port portion 32 of the sludge pot 13 for use.

  The cyclone filter 14 is provided with a liquid inlet 42 connected to a liquid discharge port 40 of the vortex pump 11 via a pipe 41 in a tangential direction of a circular horizontal section in a conical filter casing 43, and an upper center of the filter casing 43. In addition, a liquid outlet pipe 44 is provided, and a sludge drop opening 45 is provided at the lower portion of the filter casing 43.

  A cyclone filter sludge pot 15 for accumulating fine sludge S2 separated from the liquid by the cyclone filter 14 is connected to the sludge drop opening 45 of the cyclone filter 14 through an upper on-off valve 46. A lower opening / closing valve 48 is provided at the lower discharge port 47 of the sludge pot 15.

  As shown in FIG. 1, in the vortex pump 11, an impeller 54 in which small blades 52 and blade grooves 53 are alternately formed in a pump body 51 along an outer peripheral edge thereof is rotated by a rotating shaft 55. An annular pressure increasing passage 56 is formed in the pump body 51 along the impeller 54, and an inlet portion 57 positioned at one end of the pressure increasing passage 56 and an outlet positioned at the other end of the pressure increasing passage 56 are provided. 58 is disposed through the isolation part 59, and the inlet part 57 of the pressure increasing passage 56 is connected to the liquid suction port 26 for sucking liquid by the rotation of the impeller 54, and the outlet part 58 of the pressure increasing path 56 is connected to the outlet part 58. A liquid discharge port 40 for discharging the liquid whose pressure is increased in the pump main body 51 by the rotation of the impeller 54 is communicated with the outside.

  As shown in FIGS. 2 and 3, the spring-like filter element 24 includes a plurality of long members 84 downward from an upper member 83 having a pipe connection hole 81 and a mounting screw hole 82 for connecting to the pipe 25. The lower spring receiving member 85 is integrally provided between the relatively lower portions of these long members 84, and a plurality of members can be moved upward from the lower member 86 that can move up and down with respect to the upper member 83. A long member 87 is projected, and an upper spring receiver 88 is integrally provided between the relatively upper portions of these long members 87, and a compression coil spring 89 is provided between both spring receivers 85, 88, The compression coil spring 89 pushes up the upper spring support member 88 relative to the lower spring support member 85, and further urges the lower member 86 upward through a long member 87.

  A screw rod 91 is screwed into the central portion of the lower member 86 from below and integrated, and the screw rod 91 is inserted into the hole 93 of the locking plate 92 fixed to the lower spring receiving member 85. Then, a nut 94 is screwed into the upper end portion of the screw rod 91 protruding upward from the hole 93 and is turned, and the lower member 86 is slightly lowered between the nut 94 and the locking plate 92. A possible axial gap 95 is provided.

  Between the upper member 83 and the lower member 86 having such attachment relation, a series of metal filter media 96 formed in a coil shape is provided to be extendable and contractible. The coil-shaped metal filter medium 96 has a slight height between the adjacent spiral portions 96a and 96a, and a convex portion with a slight height formed integrally with the spiral portion 96a is interposed between the spiral portions 96a and 96a. Even if they are closely attached, a slight filtration gap 97 is formed between them.

  Thus, the filtration gap 97 between the spiral portions 96a of the filter element 24 is set to the minimum by the force urged in the compression direction by the compression coil spring 89 during filtration, and the pipe connection of the upper member 83 during backwashing. It is configured to be expanded within the range of the axial gap 95 by the backwash liquid pressure supplied from the hole 81 into the metal filter medium 96.

  In short, the filter element 24 is formed between a series of metal filter media 96 formed in a coil shape so as to be stretchable and adjacent spiral portions 96a, 96a of the metal filter media 96, and is attached in the compression direction during filtration. A filtration gap 97 which is set to a minimum by the urged force and is enlarged by the backwash liquid pressure supplied into the metal filter medium 96 at the time of backwashing is provided.

  Next, the operation of this embodiment will be described.

(Filtering action)
As shown in FIG. 1, when a rotating shaft 55 fitted in the center of the impeller 54 of the vortex pump 11 is rotated forward by an external motor (not shown), the small blade 52 and the blade of the impeller 54 are rotated. The groove 53 rotates in the pressure-increasing passage 56 concentric with the impeller 54, and the liquid sucked into the liquid suction port 26 of the pump body 51 from the revolving spring filter 12 moves along the pressure-increasing passage 56 together with the impeller 54. Then, a vortex flow is generated between each blade groove 53 of the impeller 54 and the pressure increase passage 56, and this is simultaneously performed in each blade groove 53 and proceeds in the pressure increase passage 56. It is discharged from the outlet 40.

  On the other hand, since a suction pressure is generated at the liquid suction port 26 of the vortex pump 11, the liquid in the liquid tank (not shown) is filtered by the suction pressure from the liquid inlet 21 of the swirl spring filter 12 as shown in FIG. The filter element 24 is sucked into the casing 22 from the tangential direction and turns through the filter casing 22 through the filtration gap 97 between the spiral portions 96a and 96a of the metal filter medium 96 gradually formed into a coil shape while turning in the filter casing 22. Then, the liquid is sucked into the liquid suction port 26 of the vortex pump 11 through the pipe 25 from the liquid outlet 23.

  At this time, since the coarse sludge S1 in the liquid cannot pass through the filtration gap 97 between the spiral portions 96a of the filter element 24, it is separated from the liquid and settled by its own weight while swirling in the filter casing 22. Then, it accumulates in the sludge pot 13 for the spring filter through the sludge dropping port 27 and the upper open / close valve 31 in the open state. At this time, the lower on-off valve 33 is in a closed state.

  Furthermore, the liquid discharged from the liquid discharge port 40 of the vortex pump 11 flows from the liquid inlet 42 of the cyclone filter 14 into the conical filter casing 43 from the tangential direction via the pipe 41, and sludge having a specific gravity is While swirling along the inner wall surface of the filter casing 43 by centrifugal force, it settles under its own weight and accumulates in the cyclone filter sludge pot 15 via the sludge drop opening 45 and the open upper on-off valve 46. At this time, the lower on-off valve 48 is in a closed state.

  The liquid gathers in the center of the filter casing 43 of the cyclone filter 14 and is supplied from the liquid outlet pipe 44 to an external machine tool or the like.

  When the sludge S1 accumulated in the spring filter sludge pot 13 and the sludge S2 accumulated in the cyclone filter sludge pot 15 are discharged to the outside, the upper on-off valves 31 and 46 are closed, and then the lower on-off valves 33 and 48 are closed. By opening, sludge can be discharged without stopping the vortex pump 11.

  Thus, at the time of filtering, as shown in FIG. 4A, the metal filter medium 96 formed in the coil shape of the filter element 24 of the swivel spring filter 12 is compressed to the shortest state, and the filtration gap 97 is minimized. Therefore, the sludge S1 is captured by the metal filter medium 96 in this state and separated and removed from the liquid.

(Backwashing action)
When the filter element 24 is clogged by the sludge S1 layer, as shown in FIG. 4 (b), the vortex pump 11 is reversed to reversely flow the liquid to the inside of the filter element 24. By applying the backwash pressure discharged from the liquid suction port 26 of the vortex pump 11, the internal pressure in the metal filter medium 96 of the filter element 24 rises, and the filtration gap 97 of the metal filter medium 96 becomes the axial gap 95. As a result, the sludge S1 layer clogged in the filtration gap 97 is destroyed, and the sludge S1 falls to the sludge drop opening 27 due to the backwash liquid pressure ejected from the filtration gap 97 to the outside. Or the pipe connected to the liquid inlet 21 flows back to the liquid tank.

  Next, the effect of this embodiment will be described.

  In the revolving spring filter 12, the sludge S1 separated from the liquid by the spring-like filter element 24 connected to the liquid suction port 26 of the reversible vortex pump 11 settles in the filter casing 22 and is used for the spring filter. Since it drops into the sludge pot 13 and the spring-like filter element 24 can be backwashed by reversing the vortex pump 11, a pump device that can easily maintain the filter required for removing the sludge on the pump suction side and does not require running cost is provided. Can be provided.

  In particular, in the revolving spring filter 12 having the filter casing 22 provided with the liquid inlet 21 in the tangential direction of the circular horizontal cross section, the sludge S1 in the liquid is swirled together with the liquid by the revolving spring filter 12, so that the filter casing Since it sinks by its own weight along the inner wall surface of 22, the spring-like filter element 24 is hardly clogged, and the frequency of backwashing can be reduced.

  After removing coarse sludge S1 from the liquid by the pump suction-side swivel spring filter 12, the liquid from which fine sludge S2 has been removed by the pump discharge-side cyclone filter 14 can be supplied to a machine tool or the like. At that time, even in the cyclone filter 14, the sludge S2 that swirls together with the liquid in the filter casing 43 due to its own weight along the inner wall surface of the filter casing 43 falls into the sludge pot 15 for the cyclone filter, so that the fine sludge S2 Can be reliably separated and removed from the liquid.

  The swirl-type spring filter 12 provided on the suction side of the swirl pump 11 can protect the swirl pump 11, and the swirl-type spring filter 12 and the cyclone filter 14 on the pump discharge side can perform high-precision filtration. Can be done at the same time.

  Maintenance-free operation that does not require time-consuming washing or replacement of strainers and filters, and simple valve operation of upper on-off valves 31 and 46 and lower on-off valves 33 and 48 without installing spare strainers or filters in parallel. Since it is possible to discharge and remove the sludge in the pot, it is possible to significantly reduce the cost, and the cost of the apparatus can be reduced by simplifying the piping.

  The filter element 24 that is provided with a coil-shaped metal filter medium 96 in the swivel spring filter 12 so as to expand and contract is provided with a filtration gap 97 formed between adjacent spiral portions 96a and 96a of the metal filter medium 96 in the compression direction during filtration. Since it is set to the minimum by the biased force, the sludge S1 can be reliably removed by the metal filter medium 96, and at the time of backwashing, the filtration gap 97 between the spiral portions 96a, 96a of the metal filter medium 96 is within the metal filter medium 96. Therefore, the clogged sludge S1 can be reliably backwashed and separated from the metal filter medium 96.

  The revolving spring filter 12 has high reliability due to the metal filter medium 96 having excellent durability. On the other hand, the cyclone filter (vortex dynamic filter) 14 can perform high-precision filtration, for example, fresh water (specific gravity 1.0). In the case of removing aluminum particles (specific gravity 2.7), it is possible to remove 95% of 10 μ particles and 90% of 5 μ particles.

  Next, FIG. 5 shows another embodiment, in which the liquid suction port 26 of the reversible vortex pump 11 is connected to the liquid outlet 23 of the swirl type spring filter 12, and the filter casing of the swirl type spring filter 12. The sludge pot 13 for spring filter is connected to the lower part of 22 and the sludge S1 separated from the liquid by the spring-like filter element 24 connected to the liquid suction port 26 of the reversible vortex pump 11 is Since it settles in the filter casing 22 and falls into the sludge pot 13 for the spring filter, the spring-like filter element 24 can be backwashed by reversing the vortex pump 11, so that the filter required for removing the sludge on the pump suction side is removed. It is possible to provide a pump device that is easy to maintain and does not require running costs.

  This pump device is used to filter washing water from a washing machine or car wash machine, pretreatment when using rainwater or river water, removal of chips from coolant of machine tools, metal powder from metal press oil, etc. It can be used to remove oxide film from quenching quenching water or oil.

It is a schematic diagram showing one embodiment of a pump device concerning the present invention. It is sectional drawing which shows the turning type spring filter provided in the suction side of the pump apparatus same as the above. It is the III-III sectional view taken on the line of FIG. (A) is explanatory drawing which shows the filtering effect | action of the turning type spring filter of a pump apparatus same as the above, (b) is explanatory drawing which shows a backwashing effect | action. It is a schematic diagram which shows other embodiment of the pump apparatus which concerns on this invention.

Explanation of symbols

S1, S2 sludge
11 Eddy current pump
12 Rotating spring filter
13 Sludge pot for spring filter
14 Cyclone filter
15 Sludge pot for cyclone filter
21 Liquid inlet
22 Filter casing
23 Liquid outlet
24 Filter element
26 Liquid inlet
40 Liquid outlet
42 Liquid inlet
43 Filter casing
44 Liquid outlet pipe
96 Metal filter media
96a spiral
97 Filtration gap

Claims (3)

A filter casing provided with a liquid inlet in a tangential direction of a circular horizontal cross section, and a revolving spring filter provided with a spring-like filter element disposed in the center of the filter casing and provided with a liquid outlet above;
A liquid suction port is connected to the liquid outlet of the swirl type spring filter , and a vortex pump that can reverse the liquid by reversing,
A pump device comprising: a sludge pot for a spring filter, which is connected to a lower portion of a filter casing of the swivel spring filter and accumulates sludge separated from the liquid by the swirl spring filter. A cyclone filter having a liquid inlet connected to a liquid discharge port of the vortex pump in a tangential direction of a circular horizontal cross section in a conical filter casing, and a liquid outlet pipe in the upper center of the filter casing;
The pump device according to claim 1, further comprising a cyclone filter sludge pot that is connected to a lower portion of the conical filter casing of the cyclone filter and accumulates sludge separated from the liquid by the cyclone filter. The spring-like filter element
A series of metal filter media that are formed in a coil shape and are stretchable;
A filtration gap formed between adjacent spiral portions of this metal filter medium, which is set to a minimum by a force urged in the compression direction during filtration, and enlarged by a backwash liquid pressure supplied into the metal filter medium during backwashing. The pump device according to claim 1 or 2, further comprising:

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