Strainer device

Abstract

To provide a strainer device which enables foreign objects etc. in a filter member to be removed stably without disassembling the device and also enables reduction of the frequency of maintenance work.SOLUTION: A strainer device includes: a filter member 11 which forms a cylindrical form extending along a center axis O in an axial direction and in which a liquid received from an opening at one axial side may pass through a peripheral wall 11a; a housing 12 which houses at least the peripheral wall 11a of the filter member 11 therein; a cleaning pipe 13 which is connected to an opening at the other axial side of the filter member 11 and extends over the interior and exterior of the housing 12; a drain valve 14 which communicates with the interior of the filter member 11 through the interior of the cleaning pipe 13; and a water supply valve 15 which communicates with the interior of the filter member 11 through the interior of the cleaning pipe 13.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a strainer device. [Background technology]

[0002] A known example of a conventional strainer device is the inline strainer described in Patent Document 1. This inline strainer can discharge filtration residue (foreign matter, etc.) adhering to the filtering surface of the screen (filtering member) to the outside of the housing by opening a drain valve. The entire screen can also be removed from the housing, and the filtering surface can be regenerated by cleaning the screen outside the housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6684430 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional strainer devices, foreign matter inside the filter element can be difficult to discharge through the drain valve, and can easily accumulate or form clumps inside the filter element. This requires frequent and tedious maintenance work, such as disassembling the device, removing the filter element, cleaning it, and then reassembling it.

[0005] An object of the present invention is to provide a strainer device that can stably remove foreign matter and the like from inside a filter member without disassembling the device, thereby reducing the frequency of maintenance work. [Means for solving the problem]

[0006] One aspect of the strainer device of the present invention comprises a tubular filtering element extending in the axial direction along a central axis, the filtering element having a peripheral wall through which liquid received from an opening on one axial side can pass; a housing that accommodates at least the peripheral wall of the filtering element; a cleaning pipe that is connected to an opening on the other axial side of the filtering element and extends between the inside and outside of the housing; a drain valve that is connected to the cleaning pipe; and a water supply valve that is connected to the cleaning pipe. The cleaning pipe has a plurality of branched flow paths, the drain valve is connected to one of the plurality of branched flow paths, and the water supply valve is connected to another of the plurality of branched flow paths. .

[0007] In this strainer device, liquid flows into the filter member through an opening on one side in the axial direction of the filter member and passes through the peripheral wall of the filter member from the inside to the outside, causing foreign matter in the liquid to be captured by the peripheral wall. The captured foreign matter accumulates inside the filter member.

[0008] According to the strainer device of the present invention, by opening the water supply valve, water can be supplied from the water supply valve to the inside of the filter element through the cleaning pipe. Therefore, the force of the water flow can loosen and disperse foreign matter accumulated inside the filter element, making it easier to discharge the foreign matter. Then, by opening the drain valve, foreign matter can be steadily discharged from the inside of the filter element through the inside of the cleaning pipe.

[0009] According to the present invention, it is possible to prevent foreign matter and the like from accumulating or forming clumps inside the filter member, and therefore, it is possible to stably remove foreign matter and the like inside the filter member without disassembling the device, thereby reducing the frequency of maintenance work.

[0010] In the strainer device, it is preferable that the water supply valve is connected to a portion of the cleaning pipe that is located between the filtering member and the drain valve.

[0011] In this case, closing the drain valve and opening the water supply valve will efficiently loosen and disperse the foreign matter that has accumulated inside the filter element, allowing for more stable removal of the foreign matter inside the filter element.

[0012] In the strainer device, it is preferable that the filtering member extends in the vertical direction, and the cleaning pipe is connected to an opening on the lower side of the filtering member.

[0013] In this case, when the water supply valve is open, water is supplied to the filter element from the opening at the bottom of the filter element through the cleaning pipe, flowing upward. This means that foreign matter accumulated in the filter element can be floated by the water flow from below, efficiently loosening and disintegrating it. This allows for more stable removal of foreign matter from the filter element.

[0014] The strainer device preferably includes a control unit that opens and closes the drain valve and the water supply valve.

[0015] In this case, the control unit can open the water supply valve, for example, every few minutes to tens of minutes, to periodically loosen and disperse foreign matter and the like in the filter member, maintaining it in a state where it is easy to discharge.The control unit can then open the drain valve, for example, once to several times per day, to periodically discharge foreign matter and the like from the filter member.For example, this eliminates the need for an operator to manually open and close the water supply valve and drain valve, which is a cumbersome task, and improves operability. [Effects of the Invention]

[0016] According to the strainer device of one aspect of the present invention, foreign matter and the like inside the filter member can be stably removed without disassembling the device, thereby reducing the frequency of maintenance work. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a schematic diagram showing a liquid distribution system in which the strainer device of this embodiment is provided. [Figure 2] FIG. 2 is a cross-sectional view showing the vicinity of a strainer device in a liquid distribution system. DETAILED DESCRIPTION OF THE INVENTION

[0018] A strainer device 60 according to one embodiment of the present invention will be described with reference to the drawings. 1, the strainer device 60 of this embodiment is provided in a liquid distribution system 70. More specifically, the strainer device 60 is provided in a pipe (piping) 100 through which the liquid flows in the liquid distribution system 70. The strainer device 60 captures foreign matter and the like in the liquid flowing through the pipe 100.

[0019] Specifically, strainer device 60 is installed midway through pipe 100 through which service water flows, for example, in a can manufacturing factory, and forms part of pipe 100. The liquid flowing through pipe 100 is, for example, an alkaline slaked lime solution. That is, the solute of the liquid is slaked lime, and the solvent is water. The foreign matter contained in the liquid is, for example, particles or fragments of slaked lime precipitated in the liquid.

[0020] The liquid distribution system 70 includes a pipe 100, a tank 101, a pump 102, and a nozzle 50. The pipe 100 also includes a microbubble generator 10, a plurality of branch pipes 100a, and a strainer device 60.

[0021] A liquid (slaked lime solution) is stored in tank 101. The liquid is pumped from tank 101 by pump 102, flows through pipe 100, and is sent to multiple treatment tanks (not shown) through multiple branch pipes 100a of pipe 100. For example, acidic wastewater used in can manufacturing processes flows into each treatment tank and is stored therein. The pH of the wastewater in the treatment tank is adjusted by supplying slaked lime solution to this wastewater through branch pipe 100a. The pH-adjusted wastewater is sent to a thickener or the like (not shown). Furthermore, a portion of the liquid flowing through the pipe 100 passes through the nozzle 50 from the pipe 100 and returns to the tank 101 without flowing into the branch pipe 100a.

[0022] The microbubble generator 10 generates microbubbles in a liquid flowing through a pipe 100. The microbubbles generated in the liquid have functions such as removing foreign matter adhering to the inner wall of the pipe 100 and suppressing the adhesion of new foreign matter to the inner wall of the pipe 100.

[0023] The liquid containing microbubbles flows through the pipe 100 and is discharged from the nozzle 50 into the tank 101 in a shower-like manner. The microbubbles in the liquid have the function of removing deposits adhering to the sidewall 101b of the tank 101 and the like, and the function of suppressing the adhesion of new deposits. Therefore, the liquid discharged from the nozzle 50 has a cleaning effect, and the inside of the tank 101 can be kept clean.

[0024] As shown in Figure 2, the tank 101 has a top wall 101a. The top wall 101a has a nozzle mounting cylinder 101i extending upward from the top wall 101a and a nozzle mounting flange 101j connected to the upper end of the nozzle mounting cylinder 101i. The nozzle mounting cylinder 101i is cylindrical and extends in the vertical direction. The nozzle mounting flange 101j is an annular plate that extends radially outward from the upper end of the nozzle mounting cylinder 101i.

[0025] The nozzle 50 is connected to the downstream end of the pipe 100. In this embodiment, a strainer device 60 is disposed at the downstream end of the pipe 100, and the nozzle 50 is connected to the strainer device 60. The nozzle 50 is disposed below the strainer device 60 and attached to the top wall 101a of the tank 101.

[0026] The nozzle 50 has a nozzle body 51 centered on a nozzle axis J extending in the vertical direction, a liquid dispersion section 52 arranged below the nozzle body 51, and a support shaft 53 connecting the nozzle body 51 and the liquid dispersion section 52.

[0027] The nozzle body 51 is fixed to the top wall 101a of the tank 101. The lower end of the nozzle body 51 protrudes below the top wall 101a. The nozzle body 51 has a portion located below the top wall 101a and a portion located above the top wall 101a. The nozzle body 51 has ejection holes 56 that extend vertically inside the nozzle body 51 and open to the upper and lower sides of the nozzle body 51. A plurality of ejection holes 56 are provided in a line around the nozzle axis J of the nozzle body 51. For example, six ejection holes 56 are provided at equal intervals around the nozzle axis J.

[0028] The nozzle body 51 has a cylindrical body 51a and a flange body 51b. The cylindrical body 51a has a cylindrical shape that extends in the vertical direction. The cylindrical body 51a fits into the nozzle mounting cylinder 101i. The lower end of the cylindrical body 51a is located below the top wall 101a. The lower end of the cylindrical body 51a is disposed inside the tank 101. An ejection hole 56 is disposed inside the cylindrical body 51a. The ejection hole 56 passes through the cylindrical body 51a in the vertical direction.

[0029] The flange body 51b is an annular plate that extends radially outward from the upper end of the cylindrical body 51a. The flange body 51b is disposed above the nozzle mounting flange 101j. The outer diameter of the flange body 51b is smaller than the outer diameter of the nozzle mounting flange 101j.

[0030] The liquid dispersion section 52 is generally disk-shaped or generally conical, with the nozzle axis J as its center. The upper surface of the liquid dispersion section 52 is tapered, sloping downward as it extends radially outward. The liquid dispersion section 52 overlaps with the ejection holes 56 when viewed from the top-bottom direction. The outer periphery of the liquid dispersion section 52 is located radially outward of the ejection holes 56. The support shaft 53 is shaped like a shaft or a column extending in the vertical direction.

[0031] The strainer device 60 is disposed at the downstream end of the pipe 100 that returns the liquid to the tank 101. The strainer device 60 is disposed adjacent to the upstream side of the nozzle 50. In this embodiment, the strainer device 60 is disposed adjacent to the upper side of the nozzle 50. Furthermore, in this embodiment, the central axis O of the strainer device 60 and the nozzle axis J of the nozzle 50 are disposed coaxially with each other.

[0032] The strainer device 60 includes a cylindrical filter member 11 centered on a central axis O, a housing 12, a cleaning pipe 13, a drain valve 14, and a water supply valve 15. In this embodiment, the direction in which the central axis O extends is referred to as the axial direction. The central axis O extends vertically, that is, in the up-down direction. Therefore, the axial direction can also be referred to as the up-down direction. In this embodiment, one axial side corresponds to the upper side, and the other axial side corresponds to the lower side. The direction perpendicular to the central axis O is called the radial direction. Within the radial direction, the direction approaching the central axis O is called the radially inner direction, and the direction away from the central axis O is called the radially outer direction. The direction of rotation around the central axis O is called the circumferential direction.

[0033] The filtering member 11 is made of a synthetic resin such as ultra-high molecular weight polyethylene (UHMW). The filtering member 11 is substantially cylindrical and extends in the axial direction (vertical direction) along the central axis O. The filtering member 11 has openings at both ends in the axial direction. The opening on one axial side (upper side) of the filtering member 11 receives liquid from the pipe section 100b of the pipe 100 adjacent to the upstream side (upper side) of the strainer device 60. In other words, the opening on one axial side of the filtering member 11 serves as a liquid receiving port.

[0034] The filtering member 11 has a peripheral wall 11a and a flange 11b. The peripheral wall 11a is cylindrical and centered on the central axis O. The peripheral wall 11a has a plurality of holes 11c penetrating the peripheral wall 11a in the radial direction (thickness direction). The holes 11c are spaced apart from one another in the circumferential and axial directions. In this embodiment, the holes 11c are circular. The inner diameter of each hole 11c is approximately several millimeters, for example, approximately 8 mm in this embodiment. Liquid flowing into the filtering member 11 from an opening on one axial side of the filtering member 11 can pass from the inside to the outside of the peripheral wall 11a through the plurality of holes 11c. During this passage, foreign matter, etc., having a size equal to or larger than the inner diameter of the holes 11c, is captured by the peripheral wall 11a and retained inside the filtering member 11. In addition, some of the foreign matter, etc., captured by the filtering member 11 is also retained inside the cleaning pipe 13.

[0035] The flange 11b has a collar shape that spreads outward in the radial direction from one axial end (upper end) of the peripheral wall 11a. The flange 11b has an annular plate shape with the central axis O as its center.

[0036] The housing 12 is made of a metal such as stainless steel. The housing 12 is generally cylindrical and has a central axis O as its center, and extends in the axial direction. The housing 12 accommodates at least the peripheral wall 11a of the filtering member 11 inside.

[0037] The housing 12 has a housing body 12a, a one-side flange 12b, and an other-side flange 12c.

[0038] The housing body 12a is substantially cylindrical and centered on the central axis O. An intermediate portion of the housing body 12a located between both axial ends has a larger diameter than both ends. One axial end (upper end) of the peripheral wall 11a of the filtering member 11 is fitted into or inserted with a gap into one axial end (upper end) of the housing body 12a. The intermediate portion of the housing body 12a and the peripheral wall 11a are spaced apart from each other in the radial direction, leaving a space between them. Liquid that passes through the peripheral wall 11a flows downward through this space and enters the nozzle 50 via the other axial end (lower end) of the housing body 12a.

[0039] The first flange 12b is connected to one axial end (upper end) of the housing body 12a. The first flange 12b is annular and has a plate shape centered on the central axis O. The first flange 12b is disposed opposite to the pipe flange 100c located at the end of the pipe section 100b in the vertical direction. The flange 11b of the filtering member 11 and a seal packing 103 are disposed between the first flange 12b and the pipe flange 100c. The first flange 12b and the pipe flange 100c are fastened together with fastening members such as bolts and nuts, thereby fixing the strainer device 60 and the pipe section 100b in a liquid-tight sealed state.

[0040] The other-side flange 12c is connected to the other axial end (lower end) of the housing body 12a. The other-side flange 12c is annular and has a central axis O as its center. The other-side flange 12c is disposed opposite the nozzle mounting flange 101j in the vertical direction. A seal packing 104 and a flange body 51b of the nozzle 50 are disposed between the other-side flange 12c and the nozzle mounting flange 101j. The other-side flange 12c and the nozzle mounting flange 101j are fastened together with fastening members such as bolts and nuts, thereby fixing the strainer device 60 and the nozzle 50 in a liquid-tight sealed state. The strainer device 60 is also fixed to the top wall 101a of the tank 101.

[0041] The cleaning pipe 13 is, for example, a metal cylinder, and is configured from a piping member, a pipe, etc. The cleaning pipe 13 is connected to an opening on the other axial side (lower side) of the filtering member 11, and extends from the inside to the outside of the housing 12.

[0042] The cleaning pipe 13 has an axial pipe portion 13a, a radial pipe portion 13b, a curved pipe portion 13c, and a branch pipe portion 13d. The axial piping portion 13a is cylindrical and extends in the axial direction, centered on the central axis O. The axial piping portion 13a is connected to an opening on the other axial side of the peripheral wall 11a.

[0043] The radial piping portion 13b has a cylindrical shape extending in the radial direction. The radial piping portion 13b penetrates the peripheral wall of the housing main body 12a in the radial direction and extends from the inside to the outside of the housing main body 12a. The portion where the radial piping portion 13b penetrates the housing main body 12a is preferably liquid-tightly sealed with a sealant or the like.

[0044] The curved piping section 13c connects the other axial end (lower end) of the axial piping section 13a and the radially inner end of the radial piping section 13b, and extends in a curved shape. In this embodiment, the axial piping section 13a, the radial piping section 13b, and the curved piping section 13c are integrally formed from a single member.

[0045] The branch pipe section 13d is connected to the radial outer end of the radial pipe section 13b. The branch pipe section 13d has a plurality of (two) branch flow paths. The branch pipe section 13d connects one flow path passing through the inside of the radial pipe section 13b to the plurality of branch flow paths.

[0046] The drain valve 14 is disposed outside the housing 12. The drain valve 14 communicates with the interior of the filtering member 11 through the interior of the cleaning pipe 13. Specifically, the drain valve 14 is connected to one (one of the branched flow paths) of the multiple branched flow paths of the branch piping section 13d, and communicates with the interior of the peripheral wall 11a via the cleaning pipe 13. In this embodiment, the drain valve 14 is a manually operated type. The drain valve 14 is normally closed, and is opened appropriately (for example, for a predetermined time) as needed.

[0047] The water supply valve 15 is disposed outside the housing 12. The water supply valve 15 communicates with the interior of the filtering member 11 through the interior of the cleaning pipe 13. The water supply valve 15 is connected to a portion of the cleaning pipe 13 located between the filtering member 11 and the drain valve 14. Specifically, the water supply valve 15 is connected to another one (the other branch flow path) of the multiple branch flow paths of the branch piping section 13d, and communicates with the interior of the peripheral wall 11a via the cleaning pipe 13. In this embodiment, the water supply valve 15 is of a manually operated type. The water supply valve 15 is normally closed, and is opened appropriately (for example, for a predetermined time) as needed.

[0048] In the strainer device 60 of the present embodiment described above, liquid flows into the filtering member 11 from the opening on one axial side of the filtering member 11 and passes through the peripheral wall 11a of the filtering member 11 from the inside to the outside, whereby foreign matter and the like in the liquid are captured by the peripheral wall 11a. The captured foreign matter and the like accumulate inside the filtering member 11.

[0049] According to the strainer device 60 of this embodiment, by opening the water supply valve 15, water can be supplied from the water supply valve 15 to the inside of the filtration element 11 via the cleaning pipe 13. Therefore, the force of the water flow can loosen and disperse foreign matter and the like accumulated inside the filtration element 11, making it easier to discharge the foreign matter and the like. Then, by opening the drain valve 14, foreign matter and the like can be stably discharged from the inside of the filtration element 11 through the inside of the cleaning pipe 13.

[0050] According to this embodiment, it is possible to prevent foreign matter and the like from accumulating or forming clumps inside the filter member 11. Therefore, it is possible to stably remove foreign matter and the like inside the filter member 11 without disassembling the device, thereby reducing the frequency of maintenance work.

[0051] In this embodiment, a water supply valve 15 is connected to a portion of the cleaning pipe 13 that is located between the filter member 11 and the drain valve 14 . In this case, by closing the drain valve 14 and opening the water supply valve 15, foreign matter and the like accumulated inside the filter member 11 can be efficiently loosened and dispersed. Therefore, foreign matter and the like inside the filter member 11 can be removed more stably.

[0052] In this embodiment, the filter member 11 extends in the vertical direction, and the cleaning pipe 13 is connected to an opening on the lower side of the filter member 11. In this case, when the water supply valve 15 is opened, water is supplied into the filtering element 11 from the opening at the bottom of the filtering element 11 toward the top via the cleaning pipe 13. In other words, foreign matter accumulated in the filtering element 11 can be floated by the water flow from below and efficiently loosened and dispersed. This allows the foreign matter in the filtering element 11 to be removed more reliably.

[0053] The present invention is not limited to the above-described embodiment, and the configuration can be changed within the scope of the present invention, as described below.

[0054] In the above embodiment, the filter member 11 is made of synthetic resin, but the present invention is not limited to this. The filter member 11 may be made of metal, such as a punched metal, a sheet-like net-like member (mesh), or a laminate thereof. Furthermore, the shape of the holes 11c in the peripheral wall 11a of the filtering member 11 is not limited to the circular hole shape described in the above embodiment.

[0055] In the above-described embodiment, an example was given in which the drain valve 14 is a manually operated type and the water supply valve 15 is a manually operated type, but this is not limited to this. The drain valve 14 may be an electrically operated type. Furthermore, the water supply valve 15 may be an electrically operated type. When the drain valve 14 and the water supply valve 15 are both electrically operated, the strainer device 60 preferably includes a control unit (not shown) that opens and closes the drain valve 14 and the water supply valve 15, respectively. The control unit is electrically connected to the drain valve 14 and the water supply valve 15, respectively. Furthermore, it is preferable that the frequency at which the control unit opens the water supply valve 15 be set higher than the frequency at which the control unit opens the drain valve 14.

[0056] In this case, the control unit can open the water supply valve 15, for example, every few minutes to every few tens of minutes, to periodically loosen and disperse foreign matter and the like in the filtration member 11, maintaining it in a state where it is easy to discharge.The control unit can then open the drain valve 14, for example, once to several times per day, to periodically discharge foreign matter and the like from the filtration member 11. For example, this can eliminate the need for an operator to manually open and close the water supply valve 15 and the drain valve 14, which is a cumbersome task, and improves operability.

[0057] The present invention may be combined with the various configurations described in the above-described embodiments and modifications, and may also include additions, omissions, substitutions, and other modifications within the scope of the present invention, without departing from the spirit of the present invention. Furthermore, the present invention is not limited to the above-described embodiments, but is limited only by the claims. [Industrial Applicability]

[0058] The strainer device of the present invention can stably remove foreign matter and the like from inside the filter member without disassembling the device, thereby reducing the frequency of maintenance work. Therefore, it has industrial applicability. [Explanation of symbols]

[0059] 11...filtering member, 11a...peripheral wall, 12...housing, 13...washing pipe, 14...drain valve, 15...water supply valve, 60...strainer device, O...central shaft

Claims

1. a filtering member having a cylindrical shape extending in an axial direction along a central axis and having a peripheral wall through which liquid received through an opening on one axial side can pass; a housing that accommodates at least the peripheral wall of the filtering member; a cleaning pipe connected to an opening on the other axial side of the filtering member and extending from the inside to the outside of the housing; a drain valve connected to the cleaning pipe; a water supply valve connected to the cleaning pipe; The cleaning pipe has a plurality of branched flow paths, the drain valve is connected to one of the plurality of branch flow paths; the water supply valve is connected to another one of the plurality of branch flow paths; Strainer device.

2. The water supply valve is connected to a portion of the cleaning pipe located between the filtering member and the drain valve. The strainer device of claim 1 .

3. The filtering member extends in the vertical direction, The cleaning pipe is connected to the lower opening of the filtering member. The strainer device according to claim 1 or 2.

4. A control unit is provided to open and close the drain valve and the water supply valve, The strainer device according to any one of claims 1 to 3.

Images