JP2010279887A - Strainer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly remove foreign matter adhered to a cover member by a simple structural strainer. <P>SOLUTION: In the strainer 11 including a housing 12 which is equipped with a mounting opening 20 in a flow passage 15 connecting an inflow port 13 and an outflow port 14 and which is equipped with a cap 21 detachably mounted in the mounting opening 20, and collecting foreign matter B in the fluid by a screen 22 mounted detachably in the flow passage 15 from the mounting opening 20, a cylindrical cover member 23 made of a non-magnetic body is installed inside the screen 22 so as to project into the flow passage 15. A permanent magnet 25 is arranged inside the cover member 23, and foreign matter A having magnetism in the fluid is adhered to the cover member 23 by the magnetic force of the permanent magnet 25. When the foreign matter A adhered to the cover member 23 is removed, the permanent magnet 25 together with the cover member 23 can be detached by detaching the cap 21 from the mounting opening 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a strainer device that collects foreign matters in a fluid that flows in a fluid pipeline, and more particularly, to a strainer device that incorporates a permanent magnet that can remove magnetic foreign matters such as fine metal pieces in the fluid. .

  For example, a fluid such as steam or compressed air that flows in a fluid pipe line contains a large amount of non-magnetic foreign matter such as dust and fine magnetic foreign matter such as fine metal pieces. May be caught in the valve seat of the pressure control valve or sandwiched between the sliding portions of the directional control valve, causing malfunction of the control valve and other fluid devices. Therefore, for example, a strainer device with a built-in permanent magnet as described in Patent Document 1 is provided in a fluid pipe line such as a steam pipe in order to filter foreign matter in a fluid flowing in the fluid pipe line. Yes. This strainer device includes a cylindrical screen that is detachably mounted in a flow path that communicates an inflow port and an outflow port, and a rod-shaped permanent magnet that protrudes into the flow path. The foreign matter having a surface is attached to the permanent magnet by magnetic force, and when the fluid passes through the screen, the foreign matter in the fluid is collected by the mesh of the screen. This permanent magnet is arranged inside the cylindrical screen, and it is possible to attach and detach the permanent magnet from the mounting opening for attaching and detaching the screen, so that the existing strainer device can be added without increasing the size of the strainer device. A permanent magnet can be attached.

  However, in the strainer device described in Patent Document 1, since the permanent magnet is protruded into the flow path while being exposed, the permanent magnet may be corroded by liquid contact with the fluid, and the permanent magnet may be damaged. is there. Therefore, as described in Patent Document 2, there is a strainer device in which the permanent magnet is covered with a non-magnetic cover member so as to block the permanent magnet from the fluid. In this strainer device, foreign matter having magnetism in the fluid is attached to the outer surface of the cover member by the magnetic force of the permanent magnet.

Japanese Utility Model Publication No. 60-168556 JP-A-8-117517

  By the way, in the strainer device described in Patent Document 2, the permanent magnet is movably inserted into the cover member protruding into the flow path, and when removing the foreign matter adhering to the cover member, it is permanent. By moving the magnet to the mounting port side and opening the blow valve with foreign matter adhering to the cover member collected on the mounting port side, the foreign matter adhering to the cover member is discharged from the discharge port by the flow of fluid. I have to. Thereby, even if it does not remove a cover member from a strainer apparatus, the foreign material adhering to a cover member can be removed now.

  However, in this case, it is necessary to provide a discharge port for discharging foreign matter on the opening side of the attachment port, and the structure of the strainer device becomes complicated. Further, since the foreign matter adhering to the cover member is discharged by the fluid flow, when the foreign matter adhering to the cover member is removed by opening the blow valve, the foreign matter is peeled off from the cover member by the fluid flow. There is a possibility that the minute foreign matter passes through the screen and flows out to the outflow port side.

  An object of the present invention is to reliably remove foreign matters attached to a cover member by a strainer device having a simple structure.

  The strainer device of the present invention includes an inflow port to which a fluid is supplied and an outflow port through which the fluid flows out, a housing in which a mounting port is formed in a flow path that connects the inflow port and the outflow port, and the inflow It is formed in a cylindrical shape that opens to the port side and the mounting port side, is detachably mounted in the flow path from the mounting port, and is formed of a non-magnetic material, collecting a foreign substance in the fluid, A cylindrical cover member disposed inside the screen so as to protrude into the flow path, and inserted into the cover member and shielded from the fluid by the cover member, and has magnetism in the fluid by magnetic force. A rod-shaped magnet that attaches foreign matter to the cover member, and a magnet that is detachably attached to the attachment port, and together with the magnet when removing foreign matter attached to the cover member. And having a cap to removable over member.

  The strainer device according to the present invention is characterized in that the mounting opening is sealed between the cover member and the housing, and the magnet is disposed between the cover member and the cap.

  The strainer device according to the present invention is characterized in that the mounting opening is sealed between the cap and the housing, and the magnet is covered with the cover member.

  The strainer device according to the present invention is characterized in that the cover member is held between the screen and the cap.

  The strainer device according to the present invention is characterized in that the cover member is supported by a spring member provided inside the screen.

  The strainer device according to the present invention is characterized in that the cover member is fixed between the cap and a cap by a pressing member sandwiched between the screen and the cap.

  The strainer device according to the present invention is characterized in that the cover member is detachably attached to the cap, and the attachment port is sealed between the cap, the housing, and the cover member.

  According to the strainer device of the present invention, since the cover member can be removed together with the permanent magnet, the cover member can be easily removed when removing the magnetic foreign matter adhering to the outer surface of the cover member. It is possible to reliably remove the adhered foreign matter. Therefore, there is no need to provide a discharge port for discharging foreign matter unlike the strainer device of the prior art, and the strainer device can have a simple structure. In addition, in order to remove foreign matter adhering to the cover member with the cover member removed from the housing, a minute foreign matter such as a fine metal piece removed from the cover member passes through the screen and flows out to the outflow port side. Can be prevented.

It is sectional drawing which shows the strainer apparatus of 1st embodiment of this invention. It is sectional drawing which expands and shows a part of strainer apparatus of FIG. It is sectional drawing which decomposes | disassembles and shows the strainer apparatus of FIG. It is sectional drawing which shows the strainer apparatus of 2nd embodiment of this invention. It is sectional drawing which expands and shows a part of strainer apparatus of FIG. It is sectional drawing which decomposes | disassembles and shows the strainer apparatus of FIG. It is sectional drawing which shows the strainer apparatus of 3rd embodiment of this invention. It is sectional drawing which expands and shows a part of strainer apparatus of FIG. It is sectional drawing which decomposes | disassembles and shows the strainer apparatus of FIG. It is sectional drawing which shows the strainer apparatus of 4th embodiment of this invention. It is sectional drawing which expands and shows a part of strainer apparatus of FIG. It is sectional drawing which decomposes | disassembles and shows the strainer apparatus of FIG. It is sectional drawing which shows the strainer apparatus of 5th embodiment of this invention. It is sectional drawing which expands and shows a part of strainer apparatus of FIG. It is sectional drawing which decomposes | disassembles and shows the strainer apparatus of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The strainer device 11 is provided in a fluid piping path and is used to remove solid foreign matters such as dust and fine metal pieces contained in a fluid such as steam and compressed air flowing in the fluid piping path. As shown in FIG. 1, the strainer device 11 has a housing 12 that constitutes a part of the fluid piping. The housing 12 includes an inflow port 13 connected to the upstream side to which a fluid is supplied, and an outflow port 14 connected to the downstream side through which the fluid flows out. The inflow port 13 and the outflow port 14 communicate with each other. The screen accommodating chamber 16 is formed in a substantially Y-shape in the flow path 15. That is, the strainer device 11 is a so-called Y-type strainer. The inflow port 13 and the outflow port 14 are formed substantially coaxially, and the inflow port 13 and the outflow port 14 are internally threaded for pipe connection.

  As shown in FIG. 3, the housing 12 is provided with a partition wall 18 having a circular communication hole 17 that communicates the screen storage chamber 16 and the inflow port 13 side. The communication hole 17 has a stepped hole shape having a small-diameter portion 17 a on the inflow port 13 side and a large-diameter portion 17 b on the screen accommodating chamber 16 side due to the step portion 18 a of the partition wall 18. Accordingly, the screen storage chamber 16 and the inflow port 13 side communicate with each other in a direction inclined with respect to an axis connecting the inflow port 13 and the outflow port 14. On the other hand, the screen storage chamber 16 and the outflow port 14 side communicate with each other in a direction substantially orthogonal to the communication direction between the screen storage chamber 16 and the inflow port 13 side. As a result, a flow path 15 in which fluid can flow from the inflow port 13 through the screen storage chamber 16 to the outflow port 14 is formed in the housing 12 by bending.

  In addition, the housing 12 is formed with a circular mounting opening 20 that opens to the side facing the communication hole 17 in the screen storage chamber 16. The mounting port 20 is formed in the flow path 15 so as to be substantially coaxial with the communication hole 17, and the screen storage chamber 16 communicates with the outside of the housing 12 through the mounting port 20. The mounting opening 20 has a stepped hole shape having a small diameter portion 20 a on the screen storage chamber 16 side and a large diameter portion 20 b on the opening side by a step portion 12 a provided in the housing 12. A female screw for cap attachment is cut in the large diameter portion 20 b of the attachment port 20, the cap 21 is detachably attached to the large diameter portion 20 b of the attachment port 20, and the attachment port 20 is closed by the cap 21. It is like that. The cap 21 is formed with a circular accommodation groove 21 a that opens to the screen accommodation chamber 16 side.

  A screen 22 for collecting foreign substances in the fluid is detachably mounted in the screen storage chamber 16 from the attachment port 20. The screen 22 is formed in a cylindrical shape that opens to the inflow port 13 side and the attachment port 20 side and has a side wall facing the outflow port 14 side, by a metal net made of non-magnetic material such as stainless steel having countless fine meshes. ing. The opening end of the screen 22 on the inflow port 13 side is inserted into the large diameter portion 17 b of the communication hole 17 and abuts against the stepped portion 18 a of the partition wall 18. On the other hand, as shown in FIG. 2, the opening end of the screen 22 on the mounting port 20 side is inserted into the small diameter portion 20a of the mounting port 20, and the cover member 23 abuts against the opening end of the screen 22 on the mounting port 20 side. It has been. That is, the screen 22 is disposed from the attachment port 20 into the flow path 15 and is fixed between the partition wall 18 and the cover member 23. The screen 22 may be a non-magnetic metal plate made of stainless steel or the like and a porous metal plate having numerous small holes or a resin fiber formed in a cylindrical shape.

  The cover member 23 is made of a non-magnetic material such as stainless steel, and has a bottomed cylindrical cover portion 23b in which a storage chamber 23a that opens on the cap 21 side is formed, and a radially outer side from the opening end of the cover portion 23b. And a to-be-held portion 23c extending in the direction. In this cover member 23, the covering portion 23 b is inserted inside the screen 22 to protrude into the flow path 15, and the sandwiched portion 23 c is abutted against the opening end of the screen 22 on the mounting opening 20 side. The opening on the mounting port 20 side of the screen 22 is closed by the cover member 23. The cover portion 23 b of the cover member 23 extends to a substantially central portion in the axial direction of the screen 22, and is disposed with a predetermined interval between the cover 22 and the screen 22. Further, the sandwiched portion 23 c of the cover member 23 is sandwiched between the stepped portion 12 a of the housing 12 and the cap 21, whereby the screen 22 is fixed to the housing 12 together with the cover member 23. . An O-ring 24 as a sealing material that contacts the held portion 23 c of the cover member 23 is attached to the stepped portion 12 a of the housing 12, and the mounting opening 20 is sealed between the housing 12 and the cover member 23. ing.

  As shown in FIG. 2, in a state where the cover member 23 is fixed between the stepped portion 12 a of the housing 12 and the cap 21, the housing chamber 23 a of the cover member 23 and the housing groove 21 a of the cap 21 are in communication. A magnet housing chamber is formed by the housing chamber 23a and the housing groove 21a. In the magnet housing chamber, a round bar-like permanent magnet 25 is arranged with its axial direction directed in the axial direction of the screen 22 in order to remove magnetic foreign matters such as fine metal pieces in the fluid. The permanent magnet 25 is inserted inside the cover member 23 and fixed between the cover member 23 and the cap 21, and the magnetic force of the permanent magnet 25 acts on the inside of the screen 22. In addition, the surface of the permanent magnet 25 facing the flow path 15 is covered with the cover member 23 and is blocked from the fluid flowing in the flow path 15, and the permanent magnet 25 is corroded by contact with the fluid. Is to be prevented.

  The fluid supplied to the strainer device 11 flows into the screen 22 from the inflow port 13, passes through the screen 22, and flows out from the outflow port 14. At this time, the foreign matter A having magnetism such as a minute metal piece among the foreign matter in the fluid flowing from the inflow port 13 to the inside of the screen 22 is attracted by the magnetic force of the permanent magnet 25 arranged on the inside of the screen 22. The member 23 is attached to the outer surface of the covering portion 23b. Further, the foreign matter B that does not have magnetism, such as dust, is collected by the mesh of the screen 22 when passing through the screen 22. As a result, foreign matter in the fluid is filtered by the strainer device 11, so that it is possible to prevent malfunction due to foreign matter biting into the fluid device provided on the downstream side of the strainer device 11. .

  As shown in FIG. 3, in this strainer device 11, the screen 22 and the cover member 23 can be removed from the housing 12 together with the permanent magnet 25 by removing the cap 21 from the mounting opening 20, and the mesh of the screen 22 is clogged. When the foreign material is laminated on the cover member 23, the strainer device 11 can be used repeatedly by removing the screen 22 and the cover member 23 and removing the foreign material attached thereto.

  Thus, since the cover member 23 can be removed together with the permanent magnet 25 by removing the cap 21 from the attachment port 20, the cover member 23 is removed when the magnetic foreign matter A attached to the outer surface of the cover member 23 is removed. It can be easily removed and the magnetic foreign matter A attached to the cover member 23 can be reliably removed. Therefore, unlike the strainer device described in Patent Document 2, it is not necessary to provide a discharge port for discharging foreign matter, and the strainer device 11 can have a simple structure. Further, in order to remove foreign matter adhering to the cover member 23 in a state where the cover member 23 is removed from the housing 12, fine foreign matters such as fine metal pieces removed from the cover member 23 pass through the screen 22 and are on the outflow port 14 side. Can be prevented from being leaked into the water.

  As described above, in the strainer device 11 shown in FIGS. 1 to 3, the attachment port 20 is sealed between the cover member 23 and the housing 12, and the permanent magnet 25 is sealed with the cover member 23 and the cap 21. However, the present invention is not limited to this, and the mounting port is sealed between the cap and the housing. The permanent magnet may be shielded from the fluid flowing in the flow path by covering the permanent magnet with the cover member. 4 is a cross-sectional view showing the strainer device according to the second embodiment of the present invention, FIG. 5 is a cross-sectional view showing a part of the strainer device of FIG. 4, and FIG. 6 is a strainer of FIG. It is sectional drawing which decomposes | disassembles and shows an apparatus. 7 is a cross-sectional view showing the strainer device of the third embodiment of the present invention, FIG. 8 is a cross-sectional view showing a part of the strainer device of FIG. 7, and FIG. 9 is an exploded view of the strainer device of FIG. It is sectional drawing shown. FIG. 10 is a cross-sectional view showing a strainer device according to a fourth embodiment of the present invention, FIG. 11 is a cross-sectional view showing a part of the strainer device shown in FIG. 10, and FIG. 12 shows the strainer device of FIG. It is sectional drawing which decomposes | disassembles and shows. 4 to 12, members similar to those shown in FIGS. 1 to 3 are denoted by the same reference numerals and description thereof is omitted.

  The strainer device 30 shown in FIG. 4 is a strainer device with a built-in permanent magnet that includes a permanent magnet 25 for removing magnetic foreign matter such as fine metal pieces in a fluid. A circular attachment port 31 formed in the housing 12 is formed in the flow path 15 so as to be substantially coaxial with the communication hole 17 on the side facing the communication hole 17 in the screen storage chamber 16. A female screw for cap attachment is cut in the attachment port 31, a cap 32 is detachably attached to the attachment port 31, and the attachment port 31 is closed by the cap 32. The cap 32 is formed with a circular accommodation groove 33 that opens to the screen accommodation chamber 16 side. The accommodation groove 33 is formed by a stepped portion 32 a provided in the cap 32 and has a large diameter that opens to the screen accommodation chamber 16 side. It has a stepped groove shape including a portion 33a and a small diameter portion 33b communicating with the large diameter portion 33a. The cap 32 is fitted with an O-ring 34 as a seal material that contacts the opening end of the housing 12 on the mounting port 31 side, and the mounting port 31 is sealed between the housing 12 and the cap 32.

  A reinforcement member 22 a for reinforcing the screen 22 is attached to the opening portion on the inflow port 13 side and the attachment port 31 side of the screen 22 detachably mounted in the screen storage chamber 16. The opening end of the screen 22 on the inflow port 13 side is inserted into the large diameter portion 17 b of the communication hole 17 and abuts against the stepped portion 18 a of the partition wall 18. On the other hand, as shown in FIG. 5, the opening end of the screen 22 on the mounting opening 31 side is inserted into the large-diameter portion 33 a of the receiving groove 33 formed in the cap 32, and the opening end of the screen 22 on the mounting opening 31 side. The cover member 35 is abutted against the surface. That is, the screen 22 is disposed from the attachment port 31 into the flow path 15 and is fixed between the partition wall 18 and the cover member 35.

  The cover member 35 formed of a non-magnetic material such as stainless steel includes a bottomed cylindrical covering portion 36b in which a storage chamber 36a that opens on the cap 32 side is formed, and a radial direction from the opening end of the covering portion 36b. The housing member 36 includes a sandwiched portion 36c that extends outward, and a disc-shaped closing member 37 that abuts against the opening end of the housing member 36 to close the housing chamber 36a. The housing member 36 and the closing member 37 are fixed to each other by a fixing means such as welding in a sandwiched portion 36c of the housing member 36 and a sandwiched portion 37a formed on the outer peripheral portion of the closing member 37. 34 is formed in a state in which the magnet housing chamber is hermetically sealed by the housing chamber 36a.

  In this cover member 35, the covering portion 36 b is inserted inside the screen 22 and protrudes into the flow path 15, and the sandwiched portion 36 c is abutted against the opening end portion of the screen 22 on the attachment port 31 side. The opening on the mounting port 31 side of the screen 22 is closed by the cover member 35. The cover portion 36 b of the cover member 35 extends to a substantially central portion in the axial direction of the screen 22, and is disposed with a predetermined interval between the screen 22. Further, the sandwiched portions 36 c and 37 a of the cover member 35 are sandwiched between the opening end portion of the screen 22 on the mounting opening 31 side and the stepped portion 32 a of the cap 32, and thereby the screen and the cover member 35 are screened together. 22 is fixed to the housing 12.

  In the magnet housing chamber formed in the cover member 35, a round bar-shaped permanent magnet 25 has its axial direction aligned with the axial direction of the screen 22 in order to remove magnetic foreign matters such as fine metal pieces in the fluid. It is arranged toward the. The permanent magnet 25 is inserted inside the cover member 35 and fixed inside the cover member 35, and the magnetic force of the permanent magnet 25 works on the inside of the screen 22. Further, the permanent magnet 25 is shielded from the fluid that is covered with the cover member 35 and flows in the flow path 15, so that the permanent magnet 25 is prevented from being corroded by contact with the fluid. ing.

  As described above, in the strainer device 30 illustrated in FIGS. 4 to 6, the attachment port 31 is sealed between the cap 32 and the housing 12, and the permanent magnet 25 is covered with the cover member 35. The permanent magnet 25 is shielded from the fluid flowing in the flow path 15, and the cover member 35 is held between the screen 22 and the cap 32. Also in the strainer device 30, as shown in FIG. 6, the cover member 35 can be removed together with the permanent magnet 25 by removing the cap 32 from the attachment port 31. Therefore, the same effect as the strainer device 11 described above can be obtained. Can do. Further, in the strainer device 30 of the present embodiment, the permanent magnet 25 and the cover member 35 are unitized by covering the permanent magnet 25 with the cover member 35, so that the permanent magnet 25 and the cover member 35 can be easily attached and detached. It is possible to do it.

  Furthermore, in the strainer device 30 of the present embodiment, the screen 22 can be removed together with the permanent magnet 25 and the cover member 35 by removing the cap 32 from the attachment port 31, so that the foreign matter attached to the screen 22 can be removed. In addition, the screen 22 can be easily removed, and the foreign matter adhering to the screen 22 can be reliably removed. In the strainer device 11 described above, the screen 22 can be removed together with the permanent magnet 25 and the cover member 23 by detaching the cap 21 from the attachment port 20, so that the same effect can be obtained. .

  Subsequently, a strainer device 40 shown in FIG. 7 is a strainer device with a built-in permanent magnet provided with a permanent magnet 25 for removing magnetic foreign matters such as fine metal pieces in a fluid. The screen 22 detachably mounted in the screen storage chamber 16 has an opening end on the inflow port 13 side inserted into the large diameter portion 17 a of the communication hole 17 and abuts against the step portion 18 a of the partition wall 18. Yes. On the other hand, as shown in FIG. 8, the opening end portion of the screen 22 on the mounting port 31 side is inserted into the large diameter portion 33 a of the receiving groove 33 formed in the cap 32, and the opening end portion of the screen 22 on the mounting port 31 side. The step 32a of the cap 32 is abutted against the cap 32. That is, the screen 22 is disposed from the attachment port 31 into the flow path 15 and is fixed between the partition wall 18 and the cap 32.

  The cover member 41 formed of a non-magnetic material such as stainless steel includes a bottomed cylindrical covering portion 42b in which a storage chamber 42a opening on the cap 32 side is formed, and a radial direction from the opening end of the covering portion 42b. A housing member 42 that extends outward and includes a supported portion 42c having a substantially L-shaped cross section that bends from the outer periphery to the screen housing chamber 16 side, and an opening end of the housing member 42 And a lid-shaped closing member 43 for closing 42a. The accommodating member 42 and the closing member 43 are fixed by fixing means such as welding, and the magnet accommodating chamber is formed in the cover member 41 in a state where the magnet accommodating chamber is sealed by the accommodating chamber 42a.

  The cover member 41 has a covering portion 42b inserted inside the screen 22 to protrude into the flow path 15, and a supported portion 42c and a closing member 43 are arranged in the opening portion of the screen 22 on the attachment port 31 side. ing. The cover portion 42 b of the cover member 41 extends to a substantially central portion in the axial direction of the screen 22, and is disposed with a predetermined gap between the cover member 41 and the screen 22. The other end of a coil spring (spring member) 44 having one end fixed to the opening end of the screen 22 on the inflow port 13 side is fixed to the supported portion 42 c of the cover member 41. Thus, the cover member 41 is supported with respect to the screen 22.

  In the magnet housing chamber formed in the cover member 41, a round bar-shaped permanent magnet 25 has its axial direction aligned with the axial direction of the screen 22 in order to remove magnetic foreign matters such as fine metal pieces in the fluid. It is arranged toward the. The permanent magnet 25 is inserted inside the cover member 41 and fixed inside the cover member 41, and the magnetic force of the permanent magnet 25 works on the inside of the screen 22. Further, the permanent magnet 25 is covered with the cover member 41 and is blocked from the fluid flowing in the flow path 15, so that the permanent magnet 25 is prevented from being corroded by liquid contact with the fluid. ing.

  As described above, in the strainer device 40 illustrated in FIGS. 7 to 9, the attachment port 31 is sealed between the cap 32 and the housing 12, and the permanent magnet 25 is covered with the cover member 41. The permanent magnet 25 is shielded from the fluid flowing in the flow path 15, and the cover member 41 is supported by a coil spring 44 provided inside the screen 22. Also in this strainer device 40, as shown in FIG. 9, the cover member 41 and the screen 22 can be removed together with the permanent magnet 25 by removing the cap 32 from the attachment port 31, and therefore the same effect as the strainer device 30 described above. Can be played.

  In the present embodiment, the other end of the coil spring whose one end is fixed to the opening end of the screen 22 on the inflow port 13 side is fixed to the supported portion 42 c of the cover member 41, so that the coil spring 44 Although the cover member 41 is supported with respect to the screen 22, the supported portion 42c of the cover member 41 is urged toward the cap 32 by a coil spring whose one end is in contact with the step portion 18a of the partition wall 18. The cover member 41 may be fixed to the housing 12 by pressing the cover member 41 toward the cap 32 with a coil spring.

  Subsequently, a strainer device 50 shown in FIG. 10 is a strainer device with a built-in permanent magnet provided with a permanent magnet 25 for removing magnetic foreign matter such as a minute metal piece in a fluid. The screen 22 detachably mounted in the screen storage chamber 16 is inserted into the large-diameter portion 17 b of the communication hole 17 at the opening end on the inflow port 13 side, and is abutted against the step portion 18 a of the partition wall 18. Yes. On the other hand, as shown in FIG. 11, the opening end portion of the screen 22 on the mounting port 31 side is inserted into the large diameter portion 33 a of the receiving groove 33 formed in the cap 32, and the opening end portion of the screen 22 on the mounting port 31 side. The pressing member 51 is abutted against the surface. That is, the screen 22 is disposed from the attachment port 31 into the flow path 15 and is fixed between the partition wall 18 and the pressing member 51.

  The pressing member 51 has a disk shape in which a through hole 51 a is formed in the central portion in the radial direction, and is disposed in the large diameter portion 33 a of the accommodation groove 33 formed in the cap 32. The sandwiched portion 51b formed on the outer peripheral portion of the pressing member 51 is sandwiched between the opening end portion of the screen 22 on the mounting opening 31 side and the stepped portion 32a of the cap 32, whereby the pressing member 51 is held. In addition, the screen 22 is fixed to the housing 12.

  The cover member 52 formed of a nonmagnetic material such as stainless steel includes a bottomed cylindrical covering portion 53b in which an accommodation chamber 53a opening on the cap 32 side is formed, and a radially outer side from the opening end of the covering portion 53b. And a closing member 54 that is abutted against the opening end of the receiving member 53 and closes the receiving chamber 53a. The housing member 53 and the closing member 54 are fixed by caulking the sandwiched portion 53 c of the housing member 53 in the crimping portion 54 a provided on the closing member 54. Further, the closing member 54 is provided with an O-ring 55 as a seal member that contacts the end face of the held portion 53c on the opening side, and the magnet housing chamber is sealed inside the cover member 52 by the housing chamber 53a. It is formed in the state.

  The cover member 52 includes a covering portion 53 b that is inserted into the screen 22 through the through hole 51 a of the pressing member 51 and protrudes into the flow path 15, while the sandwiched portion 53 c and the closing member 54 are attached to the cap 32. It is arranged in the small diameter portion 33 b of the formed accommodation groove 33. The covering portion 53 b of the cover member 52 extends to a substantially central portion in the axial direction of the screen 22, and is disposed with a predetermined gap between the covering member 52 and the screen 22. Further, the closing member 54 of the cover member 52 is fixed between the pressing member 51 and the cap 32, whereby the cover member 52 is fixed to the housing 12.

  In the magnet housing chamber formed in the cover member 52, a round bar-shaped permanent magnet 25 has its axial direction aligned with the axial direction of the screen 22 in order to remove magnetic foreign matters such as fine metal pieces in the fluid. It is arranged toward the. The permanent magnet 25 is inserted inside the cover member 52 and fixed inside the cover member 52, and the magnetic force of the permanent magnet 25 works on the inside of the screen 22. Further, the permanent magnet 25 is covered with the cover member 52 and is blocked from the fluid flowing in the flow path 15, so that the permanent magnet 25 is prevented from being corroded by liquid contact with the fluid. ing.

  As described above, in the strainer device 50 illustrated in FIGS. 10 to 12, the attachment port 31 is sealed between the cap 32 and the housing 12, and the permanent magnet 25 is covered with the cover member 52. The permanent magnet 25 is shielded from the fluid flowing in the flow path 15, and the cover member 52 is fixed between the cap and 32 by the pressing member 51 sandwiched between the screen 22 and the cap 32. ing. Also in the strainer device 50, as shown in FIG. 12, the cover member 52 and the screen 22 can be removed together with the permanent magnet 25 by removing the cap 32 from the attachment port 31, and therefore the same effect as the strainer device 30 described above. Can be played.

  As described above, in the strainer apparatuses 11, 30, 40, and 50 shown in FIGS. 1 to 12, the screen 22 together with the permanent magnet 25 is removed by removing the caps 21 and 32 from the attachment ports 20 and 31. The cover members 23, 35, 41, and 52 are removable. However, the present invention is not limited to this, and only the cover member may be removable together with the permanent magnet by detachably attaching the cover member to the cap. Here, FIG. 13 is a cross-sectional view showing a strainer device of a fifth embodiment of the present invention, FIG. 14 is a cross-sectional view showing a part of the strainer device of FIG. 13, and FIG. 15 is a strainer of FIG. It is sectional drawing which decomposes | disassembles and shows an apparatus. 13 to 15, members similar to those shown in FIGS. 1 to 12 are denoted by the same reference numerals, and description thereof is omitted.

  A strainer device 60 shown in FIG. 13 is a strainer device with a built-in permanent magnet including a permanent magnet 25 for removing magnetic foreign matter such as a minute metal piece in a fluid. A cap 61 is detachably attached to the attachment port 31 formed in the housing 12, and the attachment port 31 is closed by the cap 61. The cap 61 is formed with a storage groove 61a that opens to the screen storage chamber 16 side, a mounting groove 61b that opens to the opposite side of the screen storage chamber 16 side, and a partition wall 61c that partitions the storage groove 61a and the mounting groove 61b. The partition wall 61c is formed with a communication hole 61d that allows the accommodation groove 61a and the mounting groove 61b to communicate with each other. A female screw for attaching a fixing screw is cut on the opening side of the mounting groove 61b. The fixing screw 62 is detachably attached to the mounting groove 61b, and the opening side of the mounting groove 61b is closed by the fixing screw 62. It has become. The cap 61 is provided with an O-ring 34 as a seal member that abuts the opening end of the housing 12 on the mounting port 31 side.

  The screen 22 detachably mounted in the screen storage chamber 16 has an opening end on the inflow port 13 side inserted into the large diameter portion 17 a of the communication hole 17 and abuts against the step portion 18 a of the partition wall 18. Yes. On the other hand, as shown in FIG. 14, the opening end of the screen 22 on the mounting port 31 side is inserted into the receiving groove 61 a of the cap 61, and the partition wall 61 c of the cap 61 projects into the opening end of the screen 22 on the mounting port 31 side. It has been applied. That is, the screen 22 is disposed from the attachment port 31 into the flow path 15 and is fixed between the partition wall 18 and the cap 61.

  The cover member 63 formed of a non-magnetic material such as stainless steel is welded to the housing member 64 in which the housing chamber 64a that opens to the fixing screw 62 side is formed, and the opening end of the housing member 64, and is radially outer. And a pinched member 65 extending in the direction. An elastic member 66 made of a rubber material or the like is detachably attached to the opening of the cover member 63, and the opening of the cover member 63 is closed by the elastic member 66. Thereby, a magnet storage chamber is formed in the cover member 63 by the storage chamber 64a.

  In this cover member 63, the accommodating member 64 is inserted into the screen 22 through the communication hole 61d and protrudes into the flow path 15, and the pinched member 65 is accommodated in the mounting groove 61b to be formed in the partition wall 61c. The caps 61 are arranged in abutted state, and the communication holes 61 d of the cap 61 are closed by the cover member 63. The housing member 64 of the cover member 63 extends to a substantially central portion in the axial direction of the screen 22, and is arranged with a predetermined gap between the screen 22. Further, the pinched member 65 of the cover member 63 is fixed between the partition wall 61c of the cap 61 and the fixing screw 62, whereby the cover member 63 is detachably attached to the cap 61. An O-ring 67 as a seal member that contacts the pinched member 65 is attached to the partition wall 61 c of the cap 61, and the attachment port 31 is sealed between the cap 61, the housing 12, and the cover member 63.

  In the magnet housing chamber formed in the cover member 63, a round bar-shaped permanent magnet 25 has its axial direction aligned with the axial direction of the screen 22 in order to remove magnetic foreign matter such as fine metal pieces in the fluid. It is arranged toward the. The permanent magnet 25 is inserted inside the cover member 63 and is fixed inside the cover member 63, and the magnetic force of the permanent magnet 25 acts on the inside of the screen 22. Further, the permanent magnet 25 has a surface facing the fluid flowing in the flow path 15 covered with a cover member 63 so as to be blocked from the fluid flowing in the flow path 15. 25 is prevented from corroding.

  As described above, in the strainer device 60 illustrated in FIGS. 13 to 15, the cover member 63 is detachably attached to the cap 61, and the attachment port 31 is connected to the cap 61, the housing 12, and the cover member 63. The permanent magnet 25 is shielded from the fluid flowing in the flow path 15 by covering the permanent magnet 25 with the cover member 63. Also in the strainer device 60, the cover member 63 can be removed together with the permanent magnet 25 by removing the fixing screw 62 that is detachably attached to the cap 61. Therefore, the same effect as that of the strainer device 11 can be obtained. it can. Further, in the strainer device 60 of this embodiment, the cover member 63 can be removed together with the permanent magnet 25 by removing the fixing screw 62 from the cap 61, and the screen 22 can be removed by removing the cap 61 from the attachment port 31. Therefore, the cover member 63 can be removed while the screen 22 is attached, or the screen 22 can be removed while the cover member 63 is attached to the cap 61, and the cover member 63 or the screen 22 can be easily attached and detached. It becomes possible.

  Furthermore, in the strainer device 60 of this embodiment, the permanent magnet 25 can be removed from the cover member 63 by removing the elastic member 66 from the cover member 63, so that a foreign matter having magnetism attached to the outer surface of the cover member 63. When removing the magnetic material, the permanent magnet 25 is removed from the cover member 63 so that no magnetic force acts on the magnetic foreign material attached to the cover member 63, thereby easily removing the foreign matter attached to the cover member 63. It is possible. In the strainer device 11 described above, it is a matter of course that the foreign matter attached to the cover member 23 can be easily removed by removing the permanent magnet 25 from the cover member 23.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the strainer device 11, 30, 40, 50, 60 of the above-described embodiment, the permanent magnet 25 is formed in a round bar shape, but is not limited thereto, and may be formed in a prismatic shape or a cylindrical shape.

DESCRIPTION OF SYMBOLS 11 Strainer apparatus 12 Housing 12a Step part 13 Inflow port 14 Outflow port 15 Flow path 16 Screen accommodation chamber 17 Communication hole 17a Small diameter part 17b Large diameter part 18 Bulkhead 18a Step part 20 Mounting port 20a Small diameter part 20b Large diameter part 21 Cap 21a accommodation Groove 22 Screen 22a Reinforcing member 23 Cover member 23a Covering chamber 23b Covering portion 23c Nipped portion 24 O-ring 25 Permanent magnet 30 Strainer device 31 Mounting port 32 Cap 32a Stepped portion 33 Housing groove 33a Large diameter portion 33b Small diameter portion 34 O ring 35 cover member 36 housing member 36a housing chamber 36b covering portion 36c nipped portion 37 closing member 37a nipped portion 40 strainer device 41 cover member 42 housing member 42a housing chamber 42b covering portion 42c supported portion 43 closing member 44 coil spring (If Member)
50 Strainer Device 51 Pressing Member 51a Through-hole 51b Clamping Portion 52 Cover Member 53 Housing Member 53a Storage Chamber 53b Covering Portion 53c Nipped Portion 54 Closure Member 54a Caulking Portion 55 O-Ring 60 Strainer Device 61 Cap 61a Housing Groove 61b Mounting Groove 61c Bulkhead 61d Communication hole 62 Fixing screw 63 Cover member 64 Housing member 64a Housing chamber 65 Nipped member 66 Elastic member 67 O-ring A Foreign matter having magnetism in fluid B Foreign matter having no magnetism in fluid

Claims (7)

A housing having an inflow port to which a fluid is supplied and an outflow port through which the fluid flows out, wherein a mounting port is formed in a flow path that connects the inflow port and the outflow port;
A screen that is formed in a cylindrical shape that opens to the inflow port side and the mounting port side, and is detachably mounted in the flow path from the mounting port to collect foreign matter in the fluid;
A cylindrical cover member formed of a non-magnetic material and disposed inside the screen so as to protrude into the flow path;
A rod-shaped magnet that is inserted inside the cover member and is shielded from fluid by the cover member, and adheres foreign matter having magnetism in the fluid to the cover member by magnetic force;
A strainer device, comprising: a cap that is detachably attached to the attachment port and that allows the cover member to be removed together with the magnet when removing foreign matter attached to the cover member.   The strainer device according to claim 1, wherein the attachment port is sealed between the cover member and the housing, and the magnet is disposed between the cover member and the cap. .   The strainer device according to claim 1, wherein the attachment port is sealed between the cap and the housing, and the magnet is covered with the cover member.   4. The strainer device according to claim 3, wherein the cover member is sandwiched between the screen and the cap.   4. The strainer device according to claim 3, wherein the cover member is supported by a spring member provided inside the screen.   4. The strainer device according to claim 3, wherein the cover member is fixed between the cap and a cap by a pressing member sandwiched between the screen and the cap.   2. The strainer device according to claim 1, wherein the cover member is detachably attached to the cap, and the attachment port is sealed between the cap, the housing, and the cover member. .

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