JP2014100683A - Filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter device that can easily recognize a replacement time of a bag-like filter regularly without visually recognizing the bag-like filter.SOLUTION: The filter device comprises: a bag-like filter 2 that is stretchably formed of a knitted stretchable yarn and filters liquid G to be filtered; a filter support 3 for holding detachably an end portion near an opening of the bag-like filter; a filter case 4 that houses the filter support, with the opening side of the bag-like filter facing upward and the longitudinal direction thereof facing in the vertical direction; a case stand 5 that comprises a spring member 103 and supports the filter case to be movable up and down by spring force of the spring member; and an indicating device 6 for replacement for indicating replacement time on the basis of position in the vertical direction of the filter case relative to the case stand.

Description

  The present invention relates to a filtration device suitable for filtering a liquid to be filtered with a bag-shaped filter.

  2. Description of the Related Art Conventionally, there is known an industrial filtering device that filters a liquid to be filtered using a bag-like filter (bag filter), that is, separates a solid having a predetermined size or more contained in the liquid to be filtered. This filtration device is used for, for example, coolant, coolant used for circulation, cooling, etc. of a machined part of a machine tool, cutting oil, grinding fluid, cleaning powder having a predetermined size or more contained in a liquid to be filtered such as cleaning fluid, polishing It is used to filter processed powder (processed waste) such as powder (see, for example, Patent Document 1).

  In such a conventional filtration device, when the filtration target liquid is filtered, the solid separated from the filtration target liquid is captured and remains inside the bag-like filter, and the bag-like filter is clogged. In this case, the replacement time of the bag-like filter is the same as the replacement of a general filter. That is, the value of one of the two pressure gauges that detects the pressure of the liquid to be filtered before and after the filter, or the clogging is detected and replaced by the differential pressure between the two, or the time for the filtration process is set in advance. It is exchanged as clogged when it passes (for example, refer patent document 2).

  By the way, in the conventional filtration apparatus, the lifetime (usable time) that is a period until the bag-like filter is clogged is short, and it takes time and labor to attach and detach the bag-like filter. There is a known problem that an operator cannot easily perform it.

  Therefore, the applicant of the present invention uses a bag-shaped filter formed to be stretchable by knitting a stretchable yarn, thereby preventing clogging and maintaining the initial filtration state for a long period of time, that is, the lifetime of the bag-shaped filter. A case having a cylindrical inner case formed of a transparent plastic and an outer case having a bottomed cylindrical shape for accommodating the inner case as a filter case By using the main body, a filtering device that can easily recognize the replacement time of the bag-like filter by visually recognizing the bag-like filter from the outside has been proposed (for example, see Patent Document 3).

JP 2003-154213 A JP 2003-326413 A JP 2010-184170 A

  However, in the conventional filtration device, the inside of the bag-like filter cannot be visually observed, so the amount of solid accumulated in the bag-like filter is estimated from the shape of the bag-like filter, and the replacement time of the bag-like filter is judged. For this reason, there is a problem in that the replacement time varies, such as the replacement time varies depending on the worker, and the replacement time is changed depending on the worker even when the worker can be used sufficiently.

  Therefore, there is a demand for a filtration device that can easily recognize the replacement time of the bag-like filter without variation.

  In the conventional filtration device, the case body has a double structure composed of a cylindrical inner case made of transparent plastic and an outer case having a viewing window, so the configuration is complicated and the manufacturing cost is high. Become. Further, when the outer case is formed of plastic in order to improve the visibility of the bag-shaped filter, the pressure resistance is insufficient if the flow rate (processing amount) of the liquid to be filtered is increased using a plurality of bag-shaped filters. It is possible.

  Therefore, there is a need for a filtration device that can easily recognize the replacement time of the bag-shaped filter without variations even when the bag-shaped filter cannot be visually recognized from the outside.

  The present invention has been made in view of these points, and an object of the present invention is to provide a filtration device that can easily recognize the replacement time of a bag-shaped filter without variation without visually recognizing the bag-shaped filter itself. And

  In order to achieve the above-described object, the filtering device according to the first aspect of the present invention is characterized by a bag-like filter that is formed to be stretchable by a knitted stretchable yarn and filters a liquid to be filtered. And a cylindrical base and a flange formed at one axial end of the outer peripheral surface of the cylindrical base, and the opening side end of the bag-shaped filter is attached and detached so as to cover at least the outer peripheral surface of the flange An opening-side end portion of the bag-like filter, comprising a mounting ring that can be freely attached, a fitting hole into which the cylindrical base body is fitted, and a filter mounting plate that has a flange support surface that supports the flange portion from below. A filter support for detachably holding the case, a case main body formed in a bottomed cylindrical shape with an open top, and a bottomed cylindrical shape with a bottom opening that is detachably attached to the case main body and covers the opening of the case main body Formed upper lid, front An opening gasket that seals between the opening end of the case main body and the upper lid, an inlet for allowing the liquid to be filtered to flow into the filter case, and the filtrate after being filtered by the bag-like filter outside the filter case A filter case for accommodating the filter support with the opening side of the bag-shaped filter facing upward and a length direction of the filter support facing up and down, and a spring member. A case stand that supports the filter case in a vertically movable manner by a spring force; and an exchange indicator that displays a replacement time of the bag-like filter based on a vertical position of the filter case with respect to the case stand. There is in point.

  And by adopting such a configuration, the liquid to be filtered that has flowed into the filter case from the inflow port passes through the bag-like filter. At this time, the liquid to be filtered is not less than a predetermined size included in the liquid to be filtered. The solid is separated by being captured by the stitches of the bag-like filter, and remains inside the bag-like filter. Further, the filtrate filtered by the bag-like filter flows out from the outlet. As the amount of solid remaining inside the bag-like filter increases, the weight of the filter case increases. As the weight of the filter case increases, the case stand moves downward in the vertical direction of the filter case. can do. Further, the replacement indicator can display that the amount of solid remaining in the bag-like filter has reached the upper limit of the capacity of the bag-like filter based on the vertical position of the filter case. Therefore, it is possible to easily recognize the replacement time of the bag-like filter by a simple method in which the operator visually recognizes the display on the replacement display. That is, it is possible to easily recognize the replacement time of the bag-shaped filter without variation without visually recognizing the bag-shaped filter itself. As a result, usability for the operator can be improved.

  According to a second aspect of the present invention, there is provided a filter device according to the first aspect, wherein the case stand includes a stand main body having a larger diameter than the case main body, and at least an upper portion attached to the stand main body. A plurality of stand legs for supporting the stand body from below, a linear guide erected on the top surface of the stand body with its length direction directed vertically, and one end moving along the linear guide And a movement path regulating member having a slider with the other end attached to the outer peripheral surface of the case body. The spring member has one end connected to the lower part of the case body and the other end The tension coil spring is connected to the stand leg portion above one end. And by adopting such a configuration, the stand body can arrange the filter case inside thereof, and the stand leg can support the stand body from below and at the lower part of the filter case. A space necessary for the vertical movement of the filter case can be easily provided. Further, the linear guide and the slider can regulate the moving direction of the filter case relative to the case stand in the vertical direction. Furthermore, the tension spring can support the filter case so as to be movable up and down, and the spring load can easily associate the moving range of the filter case with the display range of the indicator. Therefore, the filter case can be supported easily and reliably so as to be movable up and down, and the replacement time of the bag-like filter can be easily displayed based on the vertical position of the filter case with respect to the case stand.

  According to a third aspect of the present invention, there is provided a filter device according to the first or second aspect of the present invention, wherein the replacement indicator includes a pointer provided on one of the filter case and the case stand, and at least provided on the other. The indicator is provided with a scale indicating that the amount of solid trapped in the bag-like filter and remaining therein has reached a full state and has reached a replacement time. By adopting such a configuration, it is possible to easily recognize whether or not the bag filter needs to be replaced by a simple operation of reading the scale indicated by the indicator pointer.

  According to a fourth aspect of the present invention, there is provided a filter device according to any one of the first to third aspects, wherein the opening gasket is formed in a bottomed double cylindrical shape that opens downwardly. The opening portion is attached to the opening end of the case body, and the upper surface thereof is a sealing surface that is in close contact with the upper lid, and the sealing surface is flat, or the radially outer side protrudes upward, or The intermediate portion in the inner and outer directions is formed in a concave shape. And by adopting such a configuration, the one with a flat sealing surface can seal between the upper lid and the opening end of the case body, and the sealing surface with the radially outer side protruding upward Are effective for sealing when the liquid to be filtered is sucked into the filter case, and those having a sealing surface in which the intermediate portion in the inner and outer directions is formed in a concave shape It is effective for sealing when sucked or pumped into the filter case.

  According to a fifth aspect of the present invention, there is provided a filter device according to any one of the first to fourth aspects, wherein the inlet is provided in the upper lid, and the outlet is a lower part of the case body. It is in the point provided in. And by employ | adopting such a structure, since the filtration object liquid flows the inside of a filter case toward the downward direction from upper direction, the fluidity | liquidity of the filtration object liquid can be improved.

  According to a sixth aspect of the present invention, there is provided a filter device according to any one of the first to fourth aspects, wherein the inflow port and the outflow port are provided at a bottom of the case body, and the case body The lower end communicates with the inflow port, the upper end is disposed above the filter mounting plate, and the filtration target liquid supplied to the inside of the filter case through the inflow port is supplied to the bag-like filter. A cylindrical internal pipe that guides to a position above the opening is provided, and a cartridge that includes a plurality of openings through which the liquid to be filtered passes is provided in the middle of the internal pipe and that contains a coagulant aid Is that it is detachably attached. By adopting such a configuration, the internal pipe can reliably separate the flow path of the liquid to be filtered inside the filter case from the flow path of the filtrate. Further, the cartridge can surely contain the coagulant auxiliary agent in the inside thereof, and when the liquid to be filtered passes through the inside of the cartridge, due to the action of the coagulant auxiliary agent, the cartridge alone is contained in the bag to be filtered. Since solids including sizes that cannot be captured by the filter are gathered together to form a large lump and then subjected to filtration by the bag-like filter, filtration efficiency by the bag-like filter can be improved and the degree of purification of the filtrate is increased. be able to.

  According to a seventh aspect of the present invention, there is provided a filter device according to any one of the first to sixth aspects, wherein the upper lid removes a liquid component from the solid remaining in the bag-like filter. A supply port for supplying a degassing gas for deliquidation is provided, and at the bottom or bottom of the case main body, the liquid that has been trapped in the bag-like filter and removed from the remaining solid is removed from the filter. There exists the point provided with the discharge port discharged | emitted from the inside of a case to the exterior. And by adopting such a configuration, it is easy to remove liquid from the solid that is trapped inside the bag-like filter by a simple method of supplying degassing gas from the supply port to the inside of the filter case. Therefore, when replacing the bag filter, it is possible to prevent liquid from dripping from the bag filter and spilling around. As a result, it is possible to improve the usability for the operator.

  According to the filtering device of the present invention, when the amount of the solid remaining in the bag-like filter increases, the weight of the filter case increases. With the increase in the weight of the filter case, the vertical direction of the filter case with respect to the case stand Thus, the replacement indicator can indicate that the amount of solid remaining in the bag-like filter has reached the upper limit of the capacity of the bag-like filter. As a result, there is an excellent effect that the replacement time of the bag-shaped filter can be easily recognized without variation without visually checking the bag-shaped filter.

Schematic half sectional view showing the main part of the first embodiment of the filtration device according to the present invention Partially omitted side view of FIG. Partially omitted plan view of FIG. FIG. 1 is a partially omitted sectional view taken along line AA in FIG. FIG. 1 is a partially omitted sectional view taken along line B-B in FIG. Partial enlarged sectional view showing the vicinity of the mounting ring in FIG. FIG. 2 shows a main part of the filter mounting plate of FIG. 1, (a) is a plan view, (b) is an enlarged cross-sectional view along the line aa in (a), and (c) is b in (a). An enlarged cross-sectional view showing the cross section along the line -b rotated 90 degrees FIG. 2 shows the gasket for opening in FIG. 1, (a) is an enlarged cross-sectional view showing the main part of the configuration in which the sealing surface is flat, and (b) is a configuration in which the sealing surface is convex outward in the radial direction. The expanded sectional view which shows a principal part, (c) is an expanded sectional view which shows the principal part of a structure which makes the intermediate part of the inner and outer direction of a sealing surface concave. FIG. 1 is a simplified diagram illustrating a main part of an installation example of the filtration device in FIG. 1, (a) is a schematic diagram illustrating an initial filtration state, and (b) is a schematic diagram illustrating a display state of an exchange indicator. FIG. 9 shows a simplified filtration state of the filtration device of FIG. 1 following FIG. 9, (a) is a schematic diagram showing the filtration state when the bag-like filter has reached the replacement time, and (b) is an exchange indicator. Schematic diagram showing the display state of The schematic diagram which simplifies and shows the principal part of 2nd Embodiment of the filtration apparatus which concerns on this invention with the initial stage filtration state The schematic diagram which simplifies and shows the filtration state at the time of the bag-like filter of the filtration apparatus of FIG. 11 reaching replacement | exchange time. The schematic diagram which simplifies and shows the principal part of 3rd Embodiment of the filtration apparatus which concerns on this invention with the initial filtration state.

  The present invention will be described below with reference to embodiments shown in the drawings.

(First embodiment)
1 to 8 show a first embodiment of a filtration device according to the present invention.

  The filtration apparatus of this embodiment has illustrated what is used for filtration of the coolant circulated and used in a machine tool. Moreover, the filtration apparatus of this embodiment has illustrated the thing of the large flow volume which has arrange | positioned the several bag-shaped filter inside the filter case.

  As shown in FIGS. 1 to 3, the filtration device 1 of the present embodiment includes a bag-like filter 2, a filter support 3, a filter case 4, a case stand 5, and a replacement display 6. .

  The bag-like filter 2 filters the stock solution G (see FIG. 9), which is a coolant used for cooling the processed part of the machine tool as the filtration target fluid, that is, as a solid having a predetermined size or more contained in the stock solution G. This is a filter medium for separating the processed powder K (see FIG. 9). The bag-like filter 2 is formed in a bottomed cylindrical shape with one end opened, and is formed to be stretchable by a knitted stretchable yarn. This stretchable yarn is used for elastic socks, elastic stockings and the like, and is formed by combining elastic fibers (elastomer fibers) with synthetic fibers. For example, polyurethane elastic fiber (spandex) yarn as elastic fiber covers high multi-type yarns (one filament is thinner than 1.45 denier) with a large number of filaments of synthetic fibers such as polyamide (nylon) and polyester Mention may be made of ringed single-covering yarns (SCY20 WN 70/48). Alternatively, it may be a double covering yarn (DCY) obtained by covering two yarns of synthetic fibers with polyurethane elastic fiber yarns. A polyether ester elastic fiber may be used instead of the polyurethane elastic fiber. Further, by covering the yarn of the polyurethane elastic fiber or the yarn of the polyetherester elastic fiber with the yarn of the synthetic fiber, it is possible to prevent the breakage or damage of the stitches from being caused by the processing powder K in a short time. It has become. Further, the elastic yarn is formed into a tubular knitted fabric by a high gauge circular knitting machine (4 inches: 400 needles) which is a sock knitting machine, and the bag-like filter 2 is formed by the knitted fabric. The knitted fabric is knitted with Akasa (plain fabric) knitting, needle knitting or the like alone or in combination.

  The filter support 3 detachably holds the opening-side end portion of the bag-like filter 2, and in the present embodiment, the six bag-like filters 2 can be held in parallel with each other. Yes. The number of bag-like filters 2 to be held can be selected according to the specifications of the apparatus such as the flow rate (processing amount) of the stock solution G.

  The filter support 3 of the present embodiment has a mounting ring 7 and a filter mounting plate 8.

  The attachment ring 7 is attached to the opening side end of the bag-like filter 2 and is made of plastic or metal. As shown in detail in FIG. 6, the attachment ring 7 is formed to extend radially outward at the cylindrical base 10 formed in a cylindrical shape and at the upper end portion of the outer peripheral surface of the cylindrical base 10. The ring-shaped flange portion 11 is formed in a cylindrical shape as a whole. The cylindrical base 10 is formed so that its inner diameter is larger than the outer diameter in the free state of the bag-like filter 2, for example, about 80 mm. Further, in the vicinity of the lower end portion of the outer peripheral surface of the cylindrical substrate 10, a mounting annular concave groove 12 to which the opening side edge of the bag-like filter 2 is attached is formed along the circumferential direction. And in the filter attachment state which attached the attachment ring 7 to the bag-shaped filter 2 or the bag-like filter 2 to the attachment ring 7, the opening side edge part of the bag-like filter 2 is expanded so that the collar part 11 may be covered. It is folded back and attached detachably. In addition, as a filter attachment state, the outer peripheral surface of the collar part 11 should just be covered with the bag-shaped filter 2. FIG.

  The filter mounting plate 8 is for mounting the mounting ring 7 in the filter mounting state, and is made of plastic or metal. As shown in detail in FIG. 7, the filter mounting plate 8 is formed, for example, in a disk shape having a diameter of about 375 mm as a whole. Six fitting holes 15 penetrating the filter mounting plate 8 in the thickness direction are formed on the outer peripheral side of the filter mounting plate 8. These fitting holes 15 are for fitting the cylindrical base 10 of the mounting ring 7 from above, and two fitting holes adjacent to each other at an equidistant position from the axis (center line) of the filter mounting plate 8. 15 are arranged at equal angles so that the distances (intervals) between the centers are equal, and the six bag-like filters 2 can be arranged in parallel to each other. The arrangement of the fitting holes 15 may be arranged vertically and horizontally, and can be selected from various arrangements.

  A flat heel support surface 16 for supporting the ridge portion 11 of the bag-like filter 2 from below is recessed at least around the fitting hole 15 in the upper surface of the filter mounting plate 8. The depth dimension from the upper surface of the flange support surface 16 is formed to be substantially equal to the thickness dimension of the flange portion 11. Further, an installation surface 17 extending from the heel support surface 16 so as to form the same plane is formed on the outer side in the radial direction around the two fitting holes 15 facing each other shown on the left and right in FIG. Each of these installation surfaces 17 is provided with a handle 18 used for attaching / detaching the filter support 3 to / from the filter case 4 with its tip portion directed radially outward. It is attached freely. These handles 18 are formed so as not to protrude from the upper surface of the filter mounting plate 8 in the tilted state, and to protrude upward from the upper surface of the filter mounting plate 8 in the raised state.

  Connecting rods 30 (FIG. 1) for integrating the filter support 3 at a total of seven locations including the axial position of the filter mounting plate 8 and six locations between the fitting holes 15 on the outer peripheral side of the filter mounting plate 8. 4 and 5), a rod insertion hole 19 is formed through which an upper screw portion (not shown) formed in the upper end portion is inserted. Further, the two rod insertion holes 19 shown in the upper and lower parts of FIG. 7 are formed on a spot face 20 provided on a virtual plane including the heel support surface 16 and the installation surface 17 so as to sandwich the filter mounting plate 8 from above and below. Of the nuts 31 a and 31 b (FIG. 1) screwed to the connecting rod 30, the nut 31 a located on the side of the counterbore 20 is prevented from projecting upward from the upper surface of the filter mounting plate 8. In addition, as the connecting rod 30, one connecting rod 30 that connects the filter mounting plate 8 and the guide guide 23 at respective axial positions, and six that connects the filter mounting plate 8 and the guide guide 23 on each outer peripheral side. A total of seven connecting rods 30 are used. A rubber, metal, or plastic plain washer, seal washer, or the like between at least the nut 31a and the nut 31a located on the upper surface side of the filter mounting plate 8 and the upper surface of the filter mounting plate 8 is provided. However, it is preferable to use a rubber plain washer or a seal washer in the sense that the stock solution G can be more reliably prevented from mixing with the filtrate E.

  As shown in FIG. 1, a guide guide 23 is disposed on the upper surface of the filter mounting plate 8. The guide 23 guides the stock solution G flowing into the filter case 4 through the inlet 82 described later to the opening of each bag-like filter 2 and is made of plastic or metal. The guide 23 includes a guide substrate 24 that is formed in a disk shape having a slightly smaller diameter than the filter mounting plate 8. On the outer peripheral side of the guide substrate 24, as shown in FIG. 4, six cylindrical cylindrical guide cylinders 25 project downward, and the guide substrate 24 communicates with the upper and lower sides. . Further, each guide tube portion 25 is arranged at an equal angle so that the distance between the centers of the two guide tube portions 25 adjacent to each other at the equidistant position from the axis of the guide substrate 24 is the same as each fitting hole 15. In addition, the distance (radius) between the axis of the guide substrate 24 and the axis of the guide tube portion 25 is formed to be substantially equal to the distance (radius) between the axis of the filter mounting plate 8 and the axis of the fitting hole 15. Has been. Further, the outer diameter dimension of the guide cylinder portion 25 is formed smaller than the inner diameter dimension of the attachment ring 7, and the guide cylinder portion 25 is inserted into the opening of each bag-like filter 2 attached to the attachment ring 7. . Further, as shown in FIG. 1, a cylindrical outer peripheral cylindrical portion 26 protrudes upward on the outer periphery of the guide substrate 24, and a radial direction is provided at a distal end (upper end) of the outer peripheral cylindrical portion 26. An annular opening ring portion 27 having an inward flange shape projecting inward is provided.

  As shown in FIG. 4, an upper screw portion (not shown) formed at the upper end portion of the six connecting rods 30 is inserted on the outer peripheral side of the guide guide 23. The guide guide 23 is attached to the filter mounting plate 8 by a screwed nut 31c. As shown in FIG. 1, among the seven connecting rods 30, the upper end of the connecting rod 30 disposed at the axial position is a rod cover formed in a cylindrical shape having a small upper end and a large lower end. 33 inner holes are inserted. The lower end surface of the cap nut 34 screwed to the upper end of the connecting rod 30 is in contact with the upper end surface of the rod cover 33. The lower end surface of the rod cover 33 is connected to the upper surface of the guide substrate 24 via a washer (not shown). It is in contact with. As this washer, a plain washer made of rubber, metal or plastic, a seal washer, or the like can be used, but rubber is used in the sense that the stock solution G can be more reliably prevented from mixing with the filtrate E. It is preferable to use a flat washer or a seal washer. The outer diameter of the lower end, which is the maximum outer diameter of the rod cover 33, is determined by the distance between the two guide cylinders 25 facing each other so that the rod cover 33 does not interfere with the guide cylinder 25. Is also formed small. In addition, what is necessary is just to provide the nut 31c as needed, such as a design concept. For example, by adopting a configuration in which the nut 31 c is not provided, the guide guide 23 can be more easily removed from the filter mounting plate 8 of the filter support 3 by removing the cap nut 34 from the connecting rod 30.

  As shown in detail in FIG. 6, between the outer peripheral surface of the cylindrical base 10 of the mounting ring 7 and the fitting hole 15 of the filter mounting plate 8, an expansion regulating cylinder 36 formed in a cylindrical shape by metal or plastic. The upper end of is inserted. This expansion regulating cylinder 36 encloses the portion exposed below the attachment ring 7 of the bag-like filter 2 in the filter attachment state from the outside, thereby increasing the amount of the processing powder K remaining in the bag-like filter 2. The expansion of the bag-like filter 2 to the radially outer side is restricted. Of course, it also prevents the bag-like filters 2 from contacting each other. As shown in FIG. 1, a plurality of passage openings 37 (see FIG. 9) communicating inside and outside for allowing the filtrate E (see FIG. 9) filtered through the bag-like filter 2 to pass through the outer peripheral surface of the expansion regulating cylinder 36. 1, only a part of which is shown).

  As shown in FIG. 6, the inner diameter of the expansion regulating cylinder 36 is such that the outer diameter of the cylindrical base 10 can be fitted to the outer peripheral face of the cylindrical base 10 of the mounting ring 7. It is formed slightly larger than the dimensions. Further, the outer diameter dimension of the expansion regulating cylinder 36 is smaller than the outer diameter dimension of the flange 11 of the mounting ring 7 and smaller than the inner diameter dimension of the fitting hole 15, and one end (upper end) of the expansion regulating cylinder 36. Is formed so that the outer peripheral portion of the flange portion 11 protrudes radially outward from the outer peripheral surface of the expansion regulating cylinder 36 and is supported from below by the flange support surface 16. Has been. Furthermore, the length dimension of the expansion regulating cylinder 36 is longer than the length dimension of the bag-like filter 2 in the free state, for example, about 1.5 times, and is formed to be about 560 mm in this embodiment. As the shape of the passage opening 37, various shapes such as a sector, a rectangle, a circle, and a polygon can be used. Further, as the arrangement of the passage openings 37, various arrangements such as a polka dot pattern, a checkered pattern, a lattice pattern, and a houndstooth pattern can be used. Further, as the expansion regulating cylinder 36, a metal net or a plastic net formed in a cylindrical shape can be used.

  As shown in FIGS. 1 and 5, the lower end surface of the expansion regulating cylinder 36 is supported from below by the upper surface of the filter receiving plate 39. The filter receiving plate 39 is formed in a disc shape from plastic or metal, and six cylindrical receiving cylindrical portions 40 are provided on the outer peripheral side of the upper surface thereof. The lower receiving cylinders 40 project upward from their tips, and are lowered by the downward extension of the bag-like filter 2 as the amount of the processing powder K remaining in the bag-like filter 2 increases. The bottom portion can be received from below. Similar to the fitting hole 15, these lower receiving tube portions 40 are arranged at equal angles so that the distance between the centers of the two lower receiving tube portions 40 adjacent to each other at the same distance from the axis of the filter receiving plate 39 is equal. In addition, the distance between the axis of the filter receiving plate 39 and the axis of the lower receiving tube portion 40 is formed to be substantially equal to the distance between the axis of the filter mounting plate 8 and the axis of the fitting hole 15. . Further, the filter receiving plate 39 is formed with a large number of through holes 41 penetrating in the thickness direction so that the filtrate E filtered by the bag-like filter 2 can flow downward. Further, a lower screw portion (not shown) formed at the lower end portion of the connecting rod 30 is inserted through the shaft center of the filter receiving plate 39, and is screwed to the lower screw portion so as to sandwich the filter receiving plate 39 from above and below. The filter receiving plate 39 is detachably attached to the lower portion of the connecting rod 30 by the nuts 31d and 31e, and the expansion regulating cylinder 36 is held on the upper surface of the filter receiving plate 39.

  Therefore, the filter support 3 of the present embodiment includes the bag-shaped filter 2, the mounting ring 7, the filter mounting plate 8, the guide guide 23, the rod cover 33, the expansion regulating cylinder 36, and the filter receiving plate 39 that are integrally assembled by the connecting rod 30. Each part can be disassembled by removing the nuts 31a, 31b, 31c, 31d, and 31e from the connecting rod 30. That is, the filter support 3 is formed so as to be assembled and disassembled in order to attach and detach the bag-like filter 2. Further, by removing the cap nut 34 and the nut 31 c from the connecting rod 30, the rod cover 33 and the guide guide 23 can be removed from the filter support 3.

  The filter support 3 raises the exposed handle 18 with the rod cover 33 and the guide guide 23 removed, and locks the rope to the handle 18 and lifts it with a hoist or a crane. It can be lifted with.

  Further, the filter support 3 may be configured such that the expansion regulating cylinder 36 is not provided depending on the number of the bag-like filters 2 and the like. In this case, the guide guide 23 and the filter mounting plate 8 may be screwed in place of the connecting rod 30 and the filter receiving plate 39 may be disposed at the bottom of 45 described later. At this time, the filter receiving plate 39 may or may not have the lower receiving tube portion 40. Further, the filter support 3 may be configured such that the opening end side of the bag-like filter 2 is sandwiched between the attachment ring 7 and the filter attachment plate 8.

  The filter case 4 accommodates the filter support 3 with the opening side of the bag-like filter 2 facing upward, and the length direction of the filter support 3 facing up and down. As shown in FIGS. A main body 45 and an upper lid 46 are provided.

  The case main body 45 accommodates the filter support 3 so that it can be inserted and removed. In order to form the flow path of the filtrate E, the case body 45 is formed in a cylindrical shape having a larger diameter than the outer diameter of the filter support 3, for example, an inner diameter of about 400 mm, so as to surround at least the outer periphery of the filter support 3. The main body body portion 48 is formed, and a disc-shaped main body bottom wall portion 49 is disposed at a predetermined distance from the lower end of the main body body portion 48, for example, about 55 mm. The shape of the case main body 45 may be a cylindrical shape, and may be a rectangular tube having a square or polygonal cross section. Of course, according to the shape of the case main body 45, the outer peripheral shape of a corresponding member such as the filter mounting plate 8 is set. Further, when the case body 45 is made of plastic, the plastic may be transparent.

  A support ring 51 formed in an annular shape with a predetermined interval from the upper opening end of the main body trunk portion 48, for example, an interval of about 50 mm, is joined to the inner surface of the main body portion 48 (for example, welding or adhesion). Are the same). The inner hole of the support ring 51 has a smaller diameter than the outer dimension of the filter mounting plate 8 and a larger diameter than the diameter of a virtual circle that connects the outside of each expansion regulating cylinder 36. Further, as shown in detail in FIG. 6, a support mounting groove 52 having a rectangular cross section communicating with the inner hole is formed on the inner hole side of the upper surface of the support ring 51. An outer peripheral portion of the filter mounting plate 8 is detachably mounted to support the filter mounting plate 8 from below. Further, a gap between the support mounting groove 52 and the filter mounting plate 8 is sealed between the bottom surface of the support mounting groove 52 and the lower surface of the filter mounting plate 8 opposed thereto, that is, the support mounting groove 52 and the filter mounting plate 8. An internal gasket 54 serving as a fixing seal for preventing the undiluted solution G from flowing into the case main body 45 below the support mounting groove 52 is disposed. As the internal gasket 54 of the present embodiment, a rubber sheet gasket formed in an annular shape with a synthetic rubber such as NBR is used.

  Three locking pins 56 (only two are shown in FIG. 1) are attached at positions above the support mounting portion of the main body barrel 48 with their tips directed radially outward. These three locking pins 56 are equiangularly arranged so that the distances between the centers of the two locking pins 56 adjacent to each other at an equidistant position from the axis of the main body body 48 are equal.

  The upper end surface of the main body body 48 is sealed between the upper lid 46 and the case main body 45, that is, the stock solution G leaks to the outside from between the upper lid 46 and the case main body 45, and An opening gasket 58, which is a fixing seal for preventing external air from flowing into the filter case 4 from between, is mounted. As shown in FIG. 8A, the opening gasket 58 includes an outer cylinder part 59, an inner cylinder part 60, and a connecting part 61 that connects the upper part of the outer cylinder part 59 and the upper part of the inner cylinder part 60. Is formed in a bottomed double cylinder shape that opens downward in a U-shaped cross section, and the opening portion is attached to the opening end of the case main body 45. The upper surface of the connecting portion 61, which is the upper surface of the opening gasket 58, is a flat seal surface 62 that is in close contact with the upper lid 46. The sealing surface 62 may be a flat surface, but as shown in FIG. 8 (b), the radially outer side is a sealing surface 62a that is convex upward, or as shown in FIG. 8 (c), For example, the seal surface 62b can be formed such that an intermediate portion in the inner and outer directions is concave.

  The opening gasket 58 provided with the flat sealing surface 62 shown in FIG. 8A can seal between the upper lid 46 and the opening end of the case main body 45.

  In the opening gasket 58A in which the radially outer side of the seal surface 62b shown in FIG. 8B is convex upward, the tightening margin (compression amount) on the radially outer side of the seal surface 62a is larger than the tightening margin on the radially inner side. Therefore, as compared with the opening gasket 58 having the flat sealing surface 62 shown in FIG. 8A, external air flows into the filter case 4 from between the case main body 45 and the upper lid 46. It is effective to prevent. Therefore, the opening gasket 58A is effective as a seal when the stock solution G is sucked into the filter case 4.

  As shown in FIG. 8C, the opening gasket 58B in which the intermediate portion in the inner and outer directions of the seal surface 62b is formed concavely has a tightening margin on both sides in the inner and outer directions of the seal surface 62b larger than the tightening margin in the intermediate portion in the inner and outer directions. Therefore, compared to the opening gasket 58 having the flat sealing surface 62 shown in FIG. 8A, external air flows into the filter case 4 from between the case body 45 and the upper lid 46, This is effective in preventing the stock solution G from leaking to the outside from between the case body 45 and the upper lid 46. Therefore, the opening gasket 58B is effective for both a seal when sucking the stock solution G into the filter case 4 and a seal when pumping the stock solution G into the filter case 4.

  As shown in FIGS. 2 and 5, a lower trunk portion through-hole 64 provided so as to penetrate the main body barrel portion 48 is formed below the main body barrel portion 48 and above the main body bottom wall portion 49. A base end portion of a discharge pipe 65 made of a bushing or the like, which is a kind of pipe joint, is attached to the lower through-hole 64 of the trunk portion by bonding or the like. Is protruding. The opening at the tip of the discharge pipe 65 facing the outside in the radial direction serves as a discharge port 66 for discharging the liquid component generated during the liquid removal described later to the outside. The discharge port 66 is necessary when the stock solution G is sucked into the filter case 4 (see FIG. 9). The lower portion or the bottom of the case body 45, specifically, the bag-like filter of the case body 45 is used. What is necessary is just to be provided in the downward position from the bottom part (refer FIG. 10) of the bag-like filter 2 when 2 reaches | attains exchange time. Here, in the case of a configuration in which the stock solution G is pumped into the filter case 4, an outlet 72 described later can also be used as the outlet 66, so there is no need to provide the outlet 66 individually. The discharge pipe 65 may be provided as necessary according to the specifications of the apparatus and the design concept.

  As shown in FIG. 1, a bottom through hole 68 that penetrates the main body bottom wall portion 49 in the thickness direction is formed at the center of the main body bottom wall portion 49. Further, a bottom discharge chamber 69 that discharges the filtrate E that has passed through the bottom through hole 68 to the outside in the radial direction below the main body bottom wall portion 49 is provided on the lower surface of the main body bottom wall portion 49 by bonding or the like. . The bottom discharge chamber 69 is formed so as to communicate with the bottom through-hole 68 and a trunk lowermost through-hole 70 provided so as to penetrate the main body barrel 48 at a position below the bottom wall 49 of the main body. A base end portion of an outflow pipe 71 made of a bushing, which is a kind of pipe joint, is attached to the body lowermost through hole 70 by joining or the like. It protrudes outward. And the opening of the front-end | tip which faced the radial direction outer side of the outflow pipe 71 is made into the outflow port 72 which discharges the filtrate E outside. The bottom discharge chamber 69 may be configured such that a pipe joint such as an elbow is fixed to the bottom through hole 68 by screwing or the like.

  The upper lid 46 covers the upper opening of the case main body 45 and is made of plastic or metal. As shown in FIGS. 1 to 3, the upper lid 46 includes a lid body portion 76 formed in a cylindrical shape, and a lid ceiling formed in a substantially disk shape so as to close an upper opening of the lid body portion 76. The wall portion 77 is formed into a bottomed cylindrical shape having an open lower portion as a whole. The inner hole of the lid body 76 is formed to have a larger diameter than the outer diameter of the case body 45 so that the outer peripheral surface of the upper end portion of the case body 45 can be surrounded.

  A lid through-hole 80 that penetrates the lid ceiling wall 77 in the thickness direction is provided at the center of the lid ceiling wall 77. A base end portion of an inflow pipe 81 made of a bushing or the like, which is a kind of pipe joint, is attached to the lid through-hole 80 by bonding or the like, and the distal end projects upward from the upper surface of the lid top wall 77. ing. The opening at the front end facing the upper side of the inflow pipe 81 serves as an inlet 82 through which the stock solution G flows into the filter case 4.

  A rotatable ring 84 is attached to the upper part of the inflow pipe 81 protruding above the lid top wall 77, and the base end of the lid support rod 85 is fixed to the outer peripheral surface of the ring 84. Has been. The lid support bar 85 extends downward from the outer peripheral surface of the rotating ring 84 toward the radially outer side, and extends downward along the outer periphery of the lid body 76 from the tip of the horizontal portion 85a. The vertical portion 85b forms an inverted L-shaped bar as a whole. The intermediate portion of the vertical portion 85b is inserted through a slide hole 87a extending in the vertical direction provided in a cover rod support bracket 87 attached to the outer peripheral surface of the main body barrel portion 48, and the tip of the vertical portion 85b. Is projected below the cover rod support bracket 87.

  A flat rectangular block body 85c is detachably attached to the front end portion of the vertical portion 85b by a split pin or the like. When the filter support 3 is attached to or detached from the case main body 45, the upper lid 46 is placed above the case main body 45. When moved, the block body 85c comes into contact with the cover rod support bracket 87, so that the maximum upward movement position is restricted. The amount of upward movement of the upper lid 46 relative to the case body 45 is larger than the axial length of the lid body 76, and the vertical portion 85b of the lid support rod 85 is inserted into the slide hole 87a. By rotating the upper lid 46 around the slide hole 87a, the upper opening of the case main body 45 can be exposed to the outside, and in this state, the upper lid 46 is lowered to allow the block body 85c to be attached to the case stand 5. The upper lid 46 can be held in contact with the upper surface. Thereby, when attaching / detaching the filter support 3 to / from the filter case 4, the operator can easily see the upper lid 46 removed from the case main body 45, and the upper lid 46 is not separated from the case main body 45. Thus, it is possible to improve the usability by the operator.

  A supply through-hole 89 that penetrates the lid top wall 77 in the thickness direction is provided outside the top surface of the lid top wall 77 in the radial direction. A base end portion of a supply pipe 90 made of a socket or the like, which is a kind of pipe joint, is attached to the supply through-hole 89 by bonding or the like, and its tip protrudes upward from the upper surface of the lid top wall portion 77. Has been. The opening at the tip of the supply pipe 90 facing upward is a supply port 91 for supplying a degassing gas D (see FIG. 9) such as compressed air to the inside of the filter case 4 at the time of liquid removal. Note that the supply pipe 90 may be provided according to the specifications of the apparatus, the design concept, and the like, similarly to the discharge pipe 65.

  Two lid grips 93 are attached at positions where they do not interfere with the supply pipe 90 on the radially outer side of the lid top wall 77 with their tips directed upward. These lid grips 93 are for the operator to grip and operate when the upper lid 46 is attached to and detached from the case body 45. Further, the two lid grips 93 are disposed so as to face each other with the axis of the lid top wall 77 as the center. Further, each lid grip 93 has a grip rod 93a whose base end portion is attached to the lid ceiling wall portion 77, and a grip ball 93b screwed to the distal end portion thereof. For convenience of explanation, FIGS. 1 and 2 show the positions of the supply pipe 90 and the grip rod 93a different from the actual positions, and FIG. 3 shows the actual positions of the supply pipe 90 and the grip rod 93a. Is shown.

  A cylindrical shape for preventing the stock solution G from flowing between the upper opening end of the case body 45 and the upper cover 46, that is, toward the position where the opening gasket 58 is disposed, on the lower surface of the lid top wall 77. An inner wall 95 is provided. The length dimension of the inner wall 95 shown in the vertical direction in FIG. 1 is shorter than the length of the lid body portion 76 so that the tip thereof does not contact the upper surface of the guide substrate 24. The outer diameter of the inner wall 95 is smaller than the inner diameter of the opening ring portion 27, and the lower end of the inner wall 95 protrudes downward from the lower end surface of the opening ring portion 27.

  Three locking grooves 97 into which three locking pins 56 (only two are shown in FIGS. 1 and 2) disposed in the main body 48 can be inserted in the outer peripheral surface of the lid body 76. (Only two are shown in FIGS. 1 and 2). These locking grooves 97 are arranged at an equal angle so that the distances between the two locking grooves 97 adjacent to each other at the same distance from the center of the lid body 76 are equal. Each of the three locking grooves 97 includes a first insertion groove 97a that radially penetrates the inside and the outside where the locking pin 56 formed upward from the lower end surface of the lid body 76 can be inserted. The second insertion groove 97b penetrates in the radial direction through the inside and outside where the locking pin 56 formed along the circumferential direction of the lid body 76 from the top of the first insertion groove 97a can be inserted. The second insertion groove 97b is formed so as to incline upward toward the distal end separated from the first insertion groove 97a. Then, after the locking pin 56 of the upper lid 46 is inserted into the first insertion groove 97a, the upper lid 46 is rotated in the circumferential direction and the locking pin 56 is inserted toward the tip of the second insertion groove 97b, thereby The lower surface of the wall portion 77 and the upper end surface of the main body barrel portion 48 facing the wall portion 77 are close to each other, and the upper lid 46 is in the case main body 45 with the connecting portion 61 of the opening gasket 58 compressed in the vertical direction. Removably attached to.

  As shown in FIGS. 2 and 3, one of the two latch locks 100, for example, a frame body 100 a, is attached to the outer peripheral surface of the lid body portion 76. At the upper part of the surface, a latch main body 100b having a latch with a knob that can be operated so that the tip of the latch lock 100 can be moved into and out of the other end of the frame 100a, for example, is attached. The latch lock 100 also functions as a detent for the upper lid 46 attached to the case body 45, and the latch is framed with the locking pin 56 inserted into the distal end of the second insertion groove 97b of the locking groove 97. By operating to push into the body 100a, the locked state of the case body 45 and the upper lid 46 can be maintained. Of course, when the upper lid 46 is removed from the case main body 45, an operation of pulling out the latch of the latch lock 100 from the frame body 100a is performed.

  The case stand 5 supports the filter case 4 so as to be movable up and down, and has a stand main body 101, a stand leg portion 102, and a spring member 103 as shown in FIGS. .

  The stand main body 101 is formed in a cylindrical shape having a larger diameter than the case main body 45, the filter case 4 is inserted from above, and at least a lower portion of the case main body 45 is disposed on the inner side in the vertical direction. It is made of plastic or metal. The stand main body 101 is disposed below the cylindrical upper cylindrical body 105 disposed outside the intermediate portion in the vertical direction of the case main body 45 in the case mounting state where the filter case 4 is mounted on the case stand 5. A cylindrical lower cylindrical body 106 is provided.

  An annular upper flange portion 105 a extending radially outward is provided at the upper end of the upper cylindrical body 105, and a linear guide is provided on the upper surface of the upper flange portion 105 a, that is, the upper surface of the case stand 5. As shown in FIG. 3, the base end portions of the three guide rods 108 (only one is shown in FIG. 1) are attached by screwing or the like. These guide rods 108 are arranged so that their length directions are directed in the vertical direction and their tips protrude upward. Further, the three guide rods 108 are arranged at an equal angle so that the distance between the centers of the two guide rods 108 adjacent to each other at an equidistant position from the axis of the stand main body 101 is equal. The guide rod 108 is fitted in a rod fitting hole 109a provided on the distal end side of a guide receiver 109 as a slider whose base end is attached by bonding or the like above the outer peripheral surface of the case body 45. In the case mounting state, the guide receiver 109 is formed so as to be movable along the axial direction of the guide rod 108, that is, the filter case 4 is movable along the vertical direction. The guide rod 108 and the guide receiver 109 constitute a movement path regulating member 111 for regulating the movement of the filter case 4 of this embodiment in the vertical direction. The movement path regulating member 111 also functions as a rotation stopper that prevents the filter case 4 from rotating in the circumferential direction. Further, the movement path regulating member 111 may be any member that guides the moving direction of the filter case 4 in the vertical direction, and can be constituted by, for example, a guide groove and a guide piece fitted in the guide groove. Further, the number of guide rods 108 can be selected according to the design concept and the like.

  The stand leg portion 102 supports the stand main body 101 and has three support frames 113. These support frames 113 also connect the upper cylindrical body 105 and the lower cylindrical body 106 with a predetermined interval set in advance, and are made of plastic or metal. As shown in detail in FIG. 5, the support frame 113 of this embodiment is formed so that its cross section forms two sides of a triangle. Each support frame 113 has an upper end portion attached to the outer peripheral surface of the upper cylindrical body 105 by bonding or the like, and a substantially intermediate portion in the length direction of each support frame 113 is an outer peripheral portion of the lower cylindrical body 106. It is attached by joining. In addition, each support frame 113 has two free end portions in the width direction orthogonal to the length direction attached to the stand body 101 by bonding or the like so that the top portion thereof faces radially outward. Each support frame 113 is arranged at an equal angle so that the distance between the centers of the two support frames 113 adjacent to each other at an equidistant position from the axis of the stand main body 101 is equal. Further, a flat installation plate 114 having an installation mounting hole 114 a used for attachment to the installation target location is attached to the lower end of each support frame 113. The number of support frames 113 may be four or more.

  The spring member 103 is configured to displace the filter case 4 with respect to the case stand 5 by changing the weight of the filter case 4, that is, to change the vertical position of the filter case 4 with respect to the case stand 5. The spring member 103 of the present embodiment uses a tension coil spring 103a that is disposed on the inner side of each support frame 113 with its length direction directed in the vertical direction. The lower end hook, which is one end of the tension coil spring 103a, is a rod-like attached horizontally in the axial direction in the vicinity of the lower end portion of the main body barrel portion 48 located below the main body bottom wall portion 49 as a lower spring receiving body. It is locked to the spring post 115 and connected to the case main body 45. The hook at the upper end, which is the other end of the tension coil spring 103a, is a portion located above the lower portion of the case body 45 of the support frame 113 constituting the stand leg portion 102 as the upper spring receiving body, in this embodiment. The support frame 113 is connected to the stand leg 102 by being locked to a bar-shaped spring hook 116 attached to a substantially intermediate portion in the length direction of the support frame 113 with the axial direction being horizontal (FIG. 1). The case stand 5 can have various shapes, and is not limited to the shape of the present embodiment.

  The replacement indicator 6 displays the replacement time of the bag-like filter 2 based on the vertical position of the filter case 4 with respect to the case stand 5. As shown in FIG. 2, the exchange indicator 6 of the present embodiment is attached to the outer surface of the case main body 45 and the pointer 118 a whose base end is attached to the upper surface of the upper flange portion 105 a by bonding or screwing. In addition, an indicator 118 having a scale 118b indicating that the amount of the processed powder K captured and remaining inside the bag-like filter 2 has reached a full state and has reached a replacement time is used. Further, the scale 118b is formed on a label provided by sticking to the outer peripheral surface of the main body barrel part 48 or the like. The scale 118b has a horizontal line-shaped scale 118ba provided with a "full" character provided on the upper side in the vertical direction, and a horizontal line-shaped scale 118ba provided with a "sky" character provided on the lower side in the vertical direction. And a scale 118bb. Further, the label may be configured such that its attachment position can be changed in the vertical direction. Note that the scale 118b has a configuration in which only a scale (not shown) that is long and wide in the moving direction of the pointer 118a is displayed, and when the tip of the pointer 118a indicates the range of the scale, 2 may be exchanged.

  Here, “full” indicates that the amount of processed powder K trapped in the bag-like filter 2 and remaining inside the bag-like filter 2 is full, and the replacement time has come. That is, as the amount of the processing powder K captured by the bag-like filter 2 and present inside the bag-like filter 2 increases, the weight of the filter case 4 increases and the tension coil spring 103a extends, As the position of the filter case 4 is lowered, the tip of the pointer 118a moves from a position indicating the “empty” scale 118bb toward a position indicating the “full” scale 118ba.

  Needless to say, the tip of the pointer 118a points to the “empty” scale 118bb when the tension coil spring 103a does not extend or is slightly extended when the bag-like filter 2 is not used or is in the initial stage of use.

  In the case where the stock solution G is sucked into the filter case 4 by a pump 121 described later, the liquid level inside the filter case 4 becomes substantially constant regardless of whether the pump 121 is driven or stopped. That is, since the weight of the filter case 4 is constant regardless of whether the pump 121 is driven or stopped, by attaching a label so that the “empty” scale 118b is aligned with the tip of the pointer 118a in the initial state of filtration, “full” Each of the “empty” scales 118b can be one. Of course, it is important to adjust the spring load of the tension coil spring 103 a to the amount of movement of the filter case 4. For example, when the amount of the processing powder K captured by the bag-like filter 2 is full, the entire filter case 4 is connected to the filter case 4 and added with a valve or piping that applies a load to the filter case 4. The weight is increased by 5 kg, the filter case 4 is lowered by about 70 mm, and the tip of the pointer 118a is configured to indicate the “full” scale 118ba.

  Further, the scale 118b indicates “full” and “empty” when the filtration is stopped when the stock solution G is not supplied to the filtration device 1, that is, the scale 118b is captured by the bag-like filter 2 and An indication of the amount of processed powder K remaining inside, and an indication of “full” and “empty” in the filtration state in which the stock solution G is supplied to the filtration device 1, that is, present inside the filtration device 1 In addition to the amount of the stock solution G to be displayed, both the one that displays the amount of the processing powder K that is captured by the bag-like filter 2 and remains inside the bag-like filter 2 may be displayed. In this case, even if the liquid level in the filter case 4 changes depending on the drive state and the stop state of the pump 121, for example, when the stock solution G is pumped into the filter case 4 by the pump 121, The exchange time of 2 can be displayed in either the filtration stop state or the filtration state.

  In addition, the filtration apparatus 1 of this embodiment can form all components with a plastic, it can form with a metal, and can form it combining a plastic and a metal. Of course, by forming the filter case 4 from metal, the pressure resistance can be easily improved as compared with the case where the filter case 4 is formed from plastic. Further, in FIGS. 1 to 8, only the main parts are denoted by reference numerals, and a plurality of the same partial parts are denoted by reference numerals only.

  Here, an installation example of the filtration device 1 of the present embodiment will be described with reference to FIG.

  As shown in FIG. 9, in the installed state of the filtration device 1 of the present embodiment, the stock solution G stored in the coolant tank 120 can be supplied to the filtration device 1 by a pump 121. The coolant tank 120 includes a supply liquid storage unit 123 that stores a filtrate E (including unused coolant) after filtering a stock solution G that is a coolant supplied to a machine tool as a filtration target liquid, and a filtration target liquid. And a stock solution storage section 124 for storing a stock solution G that is a used coolant recovered from the machine tool.

  An inflow valve 126 is connected to the inflow pipe 81 of the filtration device 1 directly or via a joint (not shown). The inflow valve 126 includes a hose that forms part of the stock solution supply pipe 127. One end of the first suction pipe 127a having the above flexibility is connected directly or through a joint (not shown). The other end of the first suction pipe 127a is connected to one end of a second suction pipe 127b formed by a pipe constituting the other part of the stock solution supply pipe 127 via a joint (not shown). The other end of the suction tube 127b is disposed in the vicinity of the bottom surface of the stock solution reservoir 124 so as to be below the surface of the stock solution G in the filtered state. In addition, it is good also as a structure which arrange | positions a strainer in the other end of the 2nd suction pipe 127b.

  A supply valve 130 is connected to the supply pipe 90 of the filtration device 1 directly or via a joint (not shown), and the supply valve 130 is a hose constituting a part of the liquid removal supply pipe 131. One end of the first supply pipe 131a having flexibility such as the above is connected directly or through a joint (not shown). The other end of the first supply pipe 131a is connected to one end of a second supply pipe 131b formed by a pipe constituting the other part of the drainage supply pipe 131 through a joint (not shown). The other end of the second supply pipe 131b is directly or directly connected to a compressed air supply source 132 such as an air compressor as a supply source for supplying compressed air as a degassing gas D through a joint (not shown). Connected indirectly through.

  An outflow valve 134 is connected to the outflow pipe 71 of the filtration device 1 directly or through a joint (not shown). The outflow valve 134 is a hose that forms a part of the reflux pipe 135. One end of the flexible first return pipe 135a is connected through a joint (not shown). The other end of the first return pipe 135a is connected to one end of a second return pipe 135b formed by a pipe or the like constituting a part of the other part of the reflux pipe 135 through a joint (not shown). The other end of the second return pipe 135b is connected to a suction port (not shown) of the pump 121. In addition, one end of a discharge pipe 135c formed by a pipe or the like constituting the remaining part of the recirculation pipe 135 is connected to a discharge port (not shown) of the pump 121 via a joint (not shown). The other end of the tube 135c is disposed above the stock solution storage unit 124.

  A discharge valve 137 is connected to the discharge pipe 65 of the filtration device 1 directly or via a joint (not shown). The discharge valve 137 includes a hose that constitutes a part of the discharge pipe 138. One end of the flexible first discharge pipe 138a is connected directly or via a joint (not shown). One end of a second discharge pipe 138b formed by a pipe constituting the other part of the discharge pipe 138 is connected to the other end of the first discharge pipe 138a via a joint (not shown). The other end of the discharge pipe 138b is disposed above the stock solution reservoir 124.

  Note that the stock solution supply pipe 127, the drainage supply pipe 131, the reflux pipe 135, and the discharge pipe 138 may all have flexibility such as a hose. Further, the other end of the second discharge pipe 138b may be connected to a drainage processing apparatus (not shown). Further, each of the inflow valve 126, the supply valve 130, the outflow valve 134, and the discharge valve 137 may be a manual valve or an operation valve. The operation valve can be selected from pneumatic drive, electric drive, and the like.

  The pump 121 sucks and supplies the stock solution G to the inside of the filter case 4 through the stock solution supply pipe 127. In this embodiment, the stock solution G and the bag-like filter 2 that have flowed into the filter case 4 are supplied. A diaphragm pump is preferable in the sense that the shared liquid surface of the filtrate E that has passed through can be held at the same height position. The pump 121 can be selected from pneumatic driving, electric driving, and the like. In the present embodiment, a pneumatic drive diaphragm pump is used.

  In addition, as an installation state of the filtration apparatus 1, a liquid pressure feeding pump may be disposed in the middle of the raw liquid supply pipe 127 so that the raw liquid G is pressure fed to the inside of the filter case 4. Therefore, the filtration device 1 of the present embodiment can be used for both the suction supply and the pressure supply supply of the stock solution G. For this reason, it is preferable to use the gasket 58B for opening provided with the sealing surface 62b which makes the intermediate part of an inner / outer direction concave for the seal between the upper cover 46 and the case main body 45. FIG.

  Next, the operation of the present embodiment having the above-described configuration will be described.

  First, the filtration operation by the filtration device 1 of the present embodiment will be described.

  In the filtration by the filtration device 1 of the present embodiment, the inflow valve 126 and the outflow valve 134 are opened to open the respective flow paths, and the supply valve 130 and the discharge valve 137 are closed to close the respective flow paths. This is done by driving the pump 121 in a closed state where the passage is closed. When the pump 121 is driven, the stock solution G stored in the stock solution storage section 124 of the coolant tank 120 is sucked from the tip of the first suction pipe 127a of the stock solution supply pipe 127 and flows through the inside of the stock solution supply pipe 127. Then, it flows into the filter case 4 from the inlet 82 of the filtration device 1 through the inflow valve 126.

  Next, the stock solution G that has flowed into the filter case 4 passes through the inner hole of the guide tube portion 25 of the guide 23 and flows into the bag-like filter 2. The stock solution G that has flowed into the bag-like filter 2 passes through the bag-like filter 2 from the inside toward the outside while flowing down the bag-like filter 2. At this time, the processing powder K having a predetermined size, for example, 20 μm or more, contained in the stock solution G is separated by being captured by the stitches of the bag-like filter 2 and remains inside the bag-like filter 2 to form a filter cake. Become.

  Here, since the bag-like filter 2 is formed by elastic fibers so as to be stretchable, the bag-like filter 2 is sequentially extended in the length direction as the filter lump is accumulated, and the filter lump is accumulated. Since the diameter of the portion is enlarged, even when the bag-like filter 2 is clogged with the filter cake of the processed powder K separated from the stock solution G, the bag-like filter 2 expands and the stitches of the bag-like filter 2 are enlarged. To maintain the initial filtration function. The maximum extension of the bag-like filter 2 is regulated by the upper surface of the filter receiving plate 39 and the maximum diameter is regulated by the inner surface of the expansion regulating cylinder 36. Further, as shown in FIG. 9, the liquid level of the filtrate E inside the filter case 4 holds a fixed position according to the flow rate (processing amount) of the stock solution G sucked by the pump 121. Of course, the liquid level of the stock solution G existing inside the bag-like filter 2 is at the same height as the liquid level of the filtrate E existing outside the bag-like filter 2. The position of the liquid level is maintained even when the pump 121 is stopped.

  Next, the filtrate E that has passed through the bag-like filter 2 passes through the outlet 72, the outlet valve 134, the first return pipe 135a, the second return pipe 135b, the pump 121, and the discharge pipe 135c in this order, and then the discharge pipe 135c. Into the supply liquid storage part 123 of the coolant tank 120.

  On the other hand, the processed powder K captured by the bag-like filter 2 is sequentially deposited from the bottom inside the bag-like filter 2 to become a filter lump. Here, when the amount of the processing powder K remaining inside the bag-like filter 2 increases, the weight of the filter case 4 increases. As the weight of the filter case 4 increases, the tension coil spring 103a expands, and the vertical position of the filter case 4 with respect to the case stand 5 is along the moving direction indicated by the downward arrow Y in FIG. Descend. In conjunction with the lowering of the filter case 4, the scale 118 b of the replacement display 6 is also lowered along the moving direction indicated by the downward arrow Y in FIG. Accordingly, the pointer 118a is relatively moved from the position indicating the “empty” scale 118bb to the position indicating the “full” scale 118ba. In actuality, the pointer 118a is not moved, but the label having the scale 118b is filtered. It goes down with case 4. Thereafter, as shown in FIG. 10 (a), when the amount of the processed powder K captured and remaining inside the bag-like filter 2 reaches a full state, the pointer 118a is, as shown in FIG. 10 (b), It indicates the “full” scale 118ba. Thereby, the replacement time of the bag-like filter 2 can be easily recognized by a simple method in which the operator visually recognizes the display of the indicator 118.

  Next, replacement of the bag-like filter 2 in the filtration device 1 of the present embodiment will be described.

  In order to replace the bag-like filter 2 in the filtration device 1 of the present embodiment, prior to the exchange of the bag-like filter 2, the liquid content from the swarf K captured and remaining inside the bag-like filter 2, that is, the stock solution G Liquid removal is performed to remove the liquid. In this drainage, the pump 121 is stopped, the inflow valve 126 and the outflow valve 134 are closed to close the respective flow paths, and the discharge valve 137 is opened to open the flow paths. The supply valve 130 is opened to open the flow path.

  When the flow path of the supply valve 130 is opened, the compressed air that has been supplied from the compressed air supply source 132 to the liquid removal supply pipe 131 and stopped flowing by the supply valve 130 passes through the supply port 91. Then flows into the filter case 4 and passes through the bag-like filter 2. Thereafter, the compressed air that has passed through the bag-like filter 2 passes through the discharge port 66, the discharge valve 137, and the discharge pipe 138 in this order, and is released into the atmosphere from the tip of the discharge pipe 138.

  Here, when the compressed air passes through the bag-like filter 2, the liquid adhering to the processing powder K having a predetermined size or more remaining inside the bag-like filter 2 by filtration is processed by the compressed air. It is removed from K, separated, and discharged to the outside of the bag-like filter 2 as a filtrate DE generated by draining. The filtrate DE discharged to the outside of the bag-like filter 2 is then discharged from the inside of the filter case 4 to the outside. In this embodiment, the filtrate DE passes through the discharge port 66, the discharge valve 137, and the discharge pipe 138 in this order. Then, it is sent from the tip of the discharge pipe 138 to the stock solution storage unit 124. Thereby, the liquid removal which removes the liquid content of the stock solution G from the processing powder K remaining inside the bag-like filter 2 is performed. Of course, the filtrate E (see FIG. 10) remaining inside the filter case 4 is also sent to the stock solution storage unit 124 by compressed air. The filtrate DE generated by draining is the same as the filtrate E obtained by filtration, and includes processing powder K having a size that passes through the stitches of the bag-like filter 2. Moreover, it is good to control the pressure of compressed air so that the cutting powder K more than the predetermined magnitude | size which the bag-like filter 2 capture | acquired does not pass a stitch at the time of liquid removal.

  Next, when the drainage is completed, the bag-like filter 2 is continuously replaced. The replacement of the bag-like filter 2 is performed by closing the supply valve 130 and the discharge valve 137 to close the respective flow paths when the pump 121 is stopped, thereby allowing the inflow valve 126 and the outflow valve 134 to be replaced. In addition, it is performed after the supply valve 130 and the discharge valve 137 are closed.

  In order to replace the bag-like filter 2 in the filtration device 1 of the present embodiment, the upper lid 46 is removed from the case body 45 of the filter case 4, the filter support 3 is removed from the case body 45, and the bag shape from the filter support 3 is removed. Removal of the filter 2, attachment of a new bag-like filter 2 to the filter support 3, attachment of the filter support 3 to the case body 45, and attachment of the upper lid 46 to the case body 45 are performed in this order.

  The upper lid 46 is removed from the case main body 45 by operating the latch lock 100 to remove the front end of the latch from the frame body 100a to release the fastening state of the upper lid 46 to the case main body 45, and then the lid grip 93 of the upper lid 46. And the upper lid 46 is rotated in the direction in which the locking pin 56 is separated from the tip of the second insertion groove 97b, in the present embodiment, in the counterclockwise direction in FIG. The rotation of the upper lid 46 stops at a position where the side end of the first insertion groove 97a contacts the locking pin 56. When the rotation of the upper lid 46 stops, the upper lid 46 is moved upward. Then, during the upward movement of the upper lid 46, that is, when the lower end of the upper lid 46 reaches above the case main body 45, the upper lid 46 is rotated about 180 degrees and then moved downward. Then, the block body 85 c provided on the lid support rod 85 abuts on the upper surface of the case stand 5, and the upper lid 46 is supported from below by the upper surface of the case stand 5 with the upper opening of the case body 45 exposed to the outside. . Thereby, the state where the upper lid 46 is supported by the case stand 5 is maintained, and both hands of the operator are freed.

  Removal of the filter support 3 from the case body 45 is performed by screwing the cap nut 34 screwed to the upper end of the central connecting rod 30 and the nuts screwed to the upper ends of the six connecting rods 30 on the outer peripheral side. 31c is removed and the guide 23 is removed together with the rod cover 33, the handle 18 exposed to the outside is raised, the rope is locked to the handle 18 and the filter support 3 is lifted by a hoist or a crane, or the handle 18 is This is performed by pulling out the filter support 3 with the bag-like filter 2 attached from the case body 45 by grasping and lifting it manually. At this time, since the processing powder K is drained, the liquid component does not drip from the bag-like filter 2 and does not spill around.

  Removal of the bag-like filter 2 from the filter support 3 and subsequent attachment of the bag-like filter 2 of the new bag-like filter 2 to the filter support 3 are processed from the filter support 3 by disassembling the filter support 3. The bag-like filter 2 filled with the powder K is removed, and then a new bag-like filter 2 is attached to the filter support 3 and assembled.

  The attachment of the filter support 3 to the case main body 45 and the attachment of the upper lid 46 to the case main body 45 perform operations opposite to the removal of the filter support 3 from the case main body 45 and the removal of the upper lid 46 from the case main body 45. . These operations complete the replacement of the bag-like filter 2. In addition, you may make it replace | exchange the filter support 3 provided with the bag-shaped filter 2 filled with the processing powder K with the new filter support 3 in the state which attached the new bag-shaped filter 2,

  As described above, according to the filtering device 1 of the present embodiment, the stock solution G that has flowed into the filter case 4 from the inlet 82 passes through the bag-like filter 2 and has a predetermined size contained in the stock solution G. More processed powder K is separated by being caught by the stitches of the bag-like filter 2 and remains inside the bag-like filter 2. Further, the filtrate E filtered by the bag-like filter 2 flows out from the outlet 72.

  Further, according to the filtration device 1 of the present embodiment, as the clogging of the bag-like filter 2 progresses, the bag-like filter 2 extends downward and expands radially outward. It is possible to reduce the reduction in filtration function and flow rate by enlarging, and even if the stitches of the bag-like filter 2 are enlarged, the filter cake of the processed powder K accumulated inside the bag-like filter 2 Functions as a filter, and even if clogging occurs in the lower part of the bag-like filter 2, the filtration function is maintained by the upper part of the bag-like filter 2 that is not clogged. Can be maintained for a long period of time.

  Therefore, according to the filtration apparatus 1 of this embodiment, the stable filtration function can be exhibited over a long period of time.

  Furthermore, according to the filtering device 1 of the present embodiment, the filter case 4 is supported by the spring force of the spring member 103 so that the filter case 4 can be moved up and down, and the position of the filter case 4 with respect to the case stand 5 in the vertical direction. The case stand 5 has a weight of the filter case 4 when the amount of the processing powder K remaining in the bag-like filter 2 increases. Therefore, as the weight of the filter case 4 increases, the vertical position of the filter case 4 with respect to the case stand 5 can be lowered. Further, the replacement indicator 6 displays that the amount of the processing powder K remaining inside the bag-like filter 2 has reached the upper limit of the amount of accommodation of the bag-like filter 2 based on the vertical position of the filter case 4. be able to.

  Therefore, according to the filtration device 1 of the present embodiment, it is possible to easily recognize the replacement time of the bag-like filter 2 by a simple method in which the operator visually recognizes the display on the replacement indicator 6. That is, the replacement time of the bag-like filter 2 can be easily recognized without variations without visually recognizing the bag-like filter 2 itself. As a result, usability for the operator can be improved.

  In addition, according to the filtration apparatus 1 of this embodiment, the problem which the filtration apparatus which arrange | positions the conventional pressure gauge and replace | exchanges a bag-like filter has, ie, an extra apparatus, and a pressure gauge Read the value to determine whether the value is a preset value that requires replacement, or read the pressure of the two pressure gauges to calculate the differential pressure, and this differential pressure value is preset It does not require the troublesome work of determining whether or not it is in a range that requires replacement.

  Moreover, according to the filtration apparatus 1 of this embodiment, since the replacement time of the bag-shaped filter 2 can be easily recognized without visual recognition of the bag-shaped filter 2, the filter case 4 is formed of metal. be able to. As a result, since the pressure resistance of the filter case 4 can be easily improved, the flow rate of the stock solution G can be increased using the plurality of bag-like filters 2. That is, it is possible to easily obtain a configuration that increases the processing amount of the stock solution G.

  Further, according to the filtration device 1 of the present embodiment, the case stand 5 includes the stand main body 101 formed in a cylindrical shape having a larger diameter than the case main body 45 and the stand main body 101 at least the upper part attached to the stand main body 101. A plurality of stand legs 102 supported from below, a guide rod 108 as a linear guide erected on the upper surface of the stand main body 101 with its length direction directed vertically, and one end along the guide rod 108 And a movement path regulating member 111 having a rod fitting hole 109a provided at the distal end side of a guide receiver 109 as a slider attached to the outer peripheral surface of the case body 45 at the other end. The spring member 103 has one end connected to the lower portion of the case body 45 and the other end connected to the stand leg 102 above the one end. Since it is the tension coil spring 103a, the stand main body 101 can arrange the filter case 4 therein, and the stand leg portion 102 can support the stand main body 101 from below, and the lower part of the filter case 4 The space required for the vertical movement of the filter case 4 can be easily provided. Further, the rod fitting hole 109 a of the guide rod 108 and the guide receiver 109 can regulate the moving direction of the filter case 4 relative to the case stand 5 in the vertical direction. Furthermore, the tension coil spring 103a can support the filter case 4 so as to be movable up and down, and the range of movement of the filter case 4 and the display range by the indicator 118 can be easily associated by the spring load. Therefore, the filter case 4 can be supported easily and reliably so as to be movable up and down, and the replacement time of the bag-like filter 2 can be easily displayed based on the vertical position of the filter case 4 with respect to the case stand 5. it can.

  Furthermore, according to the filtration device 1 of the present embodiment, the replacement indicator 6 is captured and remains inside the pointer 118 a provided on the case stand 5 and the bag-like filter 2 provided on the filter case 4. Since the indicator 118 includes a scale 118b indicating that the amount of the powder K has reached the full state and the replacement time has been reached, the bag-like filter can be obtained by a simple operation of reading the scale 118b indicated by the indicator 118a of the indicator 118. 2 can be recognized reliably and easily.

  Furthermore, according to the filtration device 1 of the present embodiment, the opening gasket 58 is formed in a bottomed double cylinder shape that opens downward, and the opening portion is attached to the opening end of the case body 45. At the same time, the upper surface is a sealing surface 62 that is in close contact with the upper lid 46. Further, the sealing surface 62 is flat, or the outer side in the radial direction is convex upward, or the intermediate portion in the inner and outer directions is concave. The opening gasket 58A provided with a sealing surface 62a having a radially outwardly convex seal surface can improve the sealing performance when the stock solution G is sucked into the filter case 4, and the intermediate portion in the inner and outer directions is formed in a concave shape. The opening gasket 58 </ b> B provided with the sealed surface 62 b can improve both the sealing performance when the stock solution G is sucked or pumped into the filter case 4.

  Further, according to the filtration device 1 of the present embodiment, since the inlet 82 is formed in the upper lid 46, the stock solution G can be smoothly and reliably introduced into the bag-like filter 2.

  Furthermore, according to the filtration device 1 of the present embodiment, since the outlet 72 is disposed below the bottom wall portion 49 of the case body 45, the filtrate E that has passed through the bag-like filter 2 can be smoothly and externally passed. It can be surely drained.

  Furthermore, according to the filtration device 1 of the present embodiment, the upper lid 46 is used as the degassing gas D for deliquidating to remove liquid from the processed powder K trapped and remaining in the bag-like filter 2. A supply port 91 for supplying compressed air is provided, and at the bottom or bottom of the case main body 45, the liquid that has been trapped inside the bag-like filter 2 and removed from the processed powder K is removed from the filter case 4. Since the discharge port 66 for discharging is provided, the compressed powder is supplied from the supply port 91 to the inside of the filter case 4 by a simple method. The liquid can be easily removed. As a result, when replacing the bag-shaped filter 2, it is possible to prevent liquid from dripping from the bag-shaped filter 2 and spilling out to the surroundings, thereby improving the usability for the operator.

(Second Embodiment)
11 and 12 show a second embodiment of the filtration device according to the present invention. The filtration device of this embodiment shows a modification of the case stand and the exchange display.

  That is, the case stand 154 of the filtration device 150 according to the present embodiment includes the stand main body 161, the stand leg 162, and the spring member 103, similarly to the case stand 5 in the first embodiment described above.

  The stand main body 161 is attached to the outer peripheral surface of the main body body 48, and has a plurality of, for example, three main body side cylinders 165 formed in a bottomed cylindrical shape with an opening at the bottom made of plastic or metal. ing. These main body side cylinders 165 are arranged with the longitudinal direction thereof directed in the vertical direction, and the upper part thereof is attached to the outer peripheral surface of the main body trunk part 48 by bonding or the like, and the lower part is the lower end of the main body trunk part 48. It is arranged below.

  The stand legs 162 are inserted into the openings of the main body side cylinder 165, and are the same number of support sides as the main body side cylinders 165 formed in a bottomed cylindrical shape with an upper portion opened by plastic or metal. A cylindrical body 166 is provided. An installation plate 114 used for attachment to a place to be installed is attached to the lower ends of these support side cylinders 166 with the thickness direction thereof being directed vertically. Further, the outer diameter of the support side cylinder 166 is smaller than the inner diameter of the main body side cylinder 165. And the lower part of the main body side cylinder 165 is inserted into each inner hole of each support side cylinder 166 from above, thereby preventing the filter case from rotating in the circumferential direction. Further, by inserting the upper part of the main body side cylinder 165 into each inner hole of each support side cylinder 166, the movement of the filter case 4 can be restricted in the vertical direction. That is, the configuration in which the upper portion of the main body side cylinder 165 is inserted into each of the inner holes of each support side cylinder 166 of the present embodiment has a detent function that prevents the filter case 4 from rotating in the circumferential direction, A function as a movement path regulating member 111 that regulates the movement of the filter case 4 in the vertical direction is provided.

  The spring member 103 displaces the filter case 4 together with the stand main body 161 with respect to the stand leg 162 due to a change in the weight of the filter case 4, that is, changes the vertical position of the filter case 4 with respect to the stand leg 162. It is. The spring member 103 of the present embodiment uses a compression coil spring 103b that is disposed inside the support side cylinder 166 with its length direction directed in the vertical direction. The upper end of the compression coil spring 103 b is in contact with the top wall of the main body side cylinder 165, and the lower end is in contact with the bottom wall of the support side cylinder 166.

  The exchange indicator 156 of this embodiment includes a limit switch 156a as a detector that detects the position of the filter case 4 when the replacement time of the bag-like filter 2 has arrived, and the limit switch 156a is connected to the limit switch 156a. And a display lamp 156b as a display device driven by the above signal. The limit switch 156a is disposed on any one of the installation plates 114 with its head portion facing the main body bottom wall portion 49, and is captured by the bag-like filter 2 to As the amount of the processing powder K existing inside increases, the weight of the filter case 44 increases and the compression coil spring 103b contracts, so that the position of the filter case 44 is lowered and the bag-like filter 2 When the amount of the processing powder K trapped inside and reaches the full state, as shown in FIG. 12, the main body bottom wall portion 49 operates the head portion of the limit switch 156a to switch the limit switch 156a. The indicator lamp 156b is operated based on the signal. Various detectors such as a proximity switch and an optical sensor can be used as the detector. As the display device, various alarm devices such as a rotating light that stimulates vision and a buzzer that stimulates hearing can be used alone or in combination.

  The replacement indicator 156 may be any device that can display the vertical position of the filter case 4 when the amount of processed powder K captured and remaining inside the bag-like filter 2 reaches a full state. . For example, the visibility which shows that the quantity of the processing powder K which was trapped inside the bag-like filter 2 and remained at a predetermined height position on the outer peripheral surface of the support-side cylinder 166 has reached a full state. When a mark, for example, red tape is stuck in the circumferential direction and the lower end of the main body side cylinder 165 moving up and down together with the filter case 4 reaches the position of the mark, it indicates that the replacement time of the bag-like filter 2 has come. You can do that. In this case, the mark and the lower end of the main body side cylinder 165 function as the “full” scale 118ba and the pointer 118a in the replacement display of the first embodiment described above.

  Since other configurations are the same as those of the filtration device 1 of the first embodiment described above, the same reference numerals are given to the main parts in the drawings, and detailed descriptions thereof are omitted. Moreover, about the some same partial goods, the code | symbol is attached | subjected only to one part.

  According to the filtration device 150 of the present embodiment having such a configuration, the same effects as those of the filtration device 150 of the first embodiment described above can be achieved.

(Third embodiment)
FIG. 13 shows a third embodiment of the filtration device according to the present invention. In the filter device of the present embodiment, the processing powder contained in the stock solution is aggregated inside the filter case before the stock solution flows into the bag-like filter.

  That is, the filtration device 170 of the present embodiment is similar to the filtration device 1 of the first embodiment described above, in the bag-like filter 2, the filter support 3, the filter case 174, the case stand 5, and the exchange indicator 6. And have.

  In the bottom through hole 68 of the case main body 181 constituting a part of the filter case 174, a central portion in the length direction of the inflow pipe 182 made of a socket or the like which is a kind of pipe joint is attached by bonding or the like. The lower end protrudes below the bottom wall portion 49 of the main body. The upper end of the inflow pipe 182 protrudes above the main body bottom wall portion 49. And the opening of the lower end which faced the downward direction of the inflow pipe 182 is made into the inflow port 82 which flows in the stock solution G into the inside of a filter case. In addition, by making the inflow pipe 182 into the shape bent 90 degrees, it can arrange | position so that the inflow port 82 may face the radial direction outer side. Further, a bottom discharge chamber 184 protrudes from the bottom side of the main body bottom wall portion 49 in the radial direction by joining or the like. The bottom discharge chamber 184 is formed so as to communicate a bottom outer through-hole 185 and a trunk lowermost through-hole 70 provided radially outward from the axis of the lower surface of the bottom wall 49 of the main body. A base end portion of an outflow pipe 71 made of a bushing, which is a kind of pipe joint, is attached to the lowermost through hole 70 by joining or the like. Further, the distal end of the outflow pipe 71 protrudes outward in the radial direction from the outer peripheral surface of the main body barrel part 48. And the opening of the front-end | tip which faced the radial direction outer side of the outflow pipe 71 is made into the outflow port 72 which discharges the filtrate E outside.

  A cylindrical lower end of an internal pipe 187 is detachably attached to the upper end of the inner hole of the inflow pipe 182 by screwing or the like. The internal pipe 187 guides the stock solution G supplied to the inside of the filter case 174 through the inlet 82 to a position above the opening of the bag-like filter 2, and is a virtual circle connecting the insides of the respective expansion regulating cylinders 36. A large-diameter cylindrical portion 187a having a diameter smaller than that of the large-diameter cylindrical portion 187a, and a lower diameter portion of the main body of the large-diameter cylindrical portion 187a having a diameter smaller than that of the large-diameter cylindrical portion 187a. And a small-diameter cylindrical portion 187b in which a screw portion to be screwed into the inner hole is formed. The length dimension of the internal pipe 187 is set so that the upper end portion thereof is positioned above the upper surface of the filter mounting plate 8.

  Inside the internal pipe 187, a cylindrical cartridge 190 having a plurality of openings (not shown) formed at least at both ends in the axial direction is detachably attached by a retaining ring 191 or the like. The outer diameter of the cartridge 190 is slightly smaller than the inner diameter of the internal pipe 187. Inside the cartridge 190 is stored a coagulant aid 193 that aggregates the processing powder K contained in the stock solution G.

  The agglomeration aid 193 is mainly composed of magnesium and preferably contains at least basic magnesium sulfate and magnesium hydroxide. Specific examples include adsorbents used in SA filters manufactured by Liquid Consand. Further, the agglomeration aid 193 is preferably in the form of particles having a size that does not inhibit the fluidity of the stock solution G.

  A mounting hole 195 to be inserted into the internal pipe 187 is formed in each shaft center portion of the filter mounting plate 8, the guide guide 23 and the filter receiving plate 39 of the filter support 3 instead of the connecting rod 30. . Of course, the rod cover 33 is not provided, and the filter mounting plate 8, the guide guide 23, and the filter receiving plate 39 are integrally assembled by the six connecting rods 30 (see FIG. 4) for connecting each of them on the outer peripheral side. It has been. Gaskets 196 such as O-rings are disposed between the mounting hole 195 of the filter mounting plate 8 and the outer peripheral surface of the internal pipe 187, and at the upper end of the inflow pipe 182 and the outer peripheral surface of the internal pipe 187, respectively. The mixture of the stock solution G and the filtrate is prevented. Further, the upper lid 198 is not provided with the inflow pipe 81. Furthermore, the supply pipe 90 of the upper cover 198 and the discharge pipe 65 of the case body 181 may be omitted.

  Since other configurations are the same as those of the filtration device 1 of the first embodiment described above, the same reference numerals are given to the main parts in the drawings, and detailed descriptions thereof are omitted.

  According to the filtration device 170 of the present embodiment having such a configuration, the stock solution G sucked into the filter case 174 from the stock solution storage portion 124 of the coolant tank 120 through the inlet 82 by the drive of the pump 121. Then, it passes through the inside of the internal pipe 187 from the bottom to the top and overflows from the upper end of the internal pipe 187. At this time, when the processing powder K contained in the stock solution G passes through the cartridge 190 installed in the internal pipe 187, it passes through the gap of the aggregation auxiliary agent 193 accommodated in the cartridge 190, thereby assisting in aggregation. By the action of the agent 193, the processed powder K aggregates, that is, the processed powder K including a size that cannot be captured by the bag-like filter 2 alone contained in the stock solution G gathers into a large lump. Then, the stock solution G overflowing from the upper end of the internal pipe 187 flows on the upper surface of the guide guide 23, passes through the guide tube portion 25, and flows into the bag-like filter 2. The stock solution G that has flowed into the bag-like filter 2 passes through the bag-like filter 2 from the inside toward the outside while flowing down the bag-like filter 2. At this time, a large lump of the processed powder K contained in the stock solution G is separated by being captured by the stitches of the bag-like filter 2 and remains inside the bag-like filter 2 to become a filter lump. Further, the filtrate E that has passed through the bag-like filter 2 passes through the outlet 72 and flows into the supply liquid reservoir 123 of the coolant tank 120.

  Therefore, according to the filtration device 170 of the present embodiment, the same effect as the filtration device 1 of the first embodiment described above can be obtained, and the processed powder K is agglomerated by the action of the agglomeration aid 193, that is, a stock solution. Since the processing powder K containing a size that cannot be captured by the bag-like filter 2 alone is collected and made into a large lump after being included in G, it is subjected to filtration by the bag-like filter 2, so that the filtration efficiency by the bag-like filter 2 can be improved. In addition, the degree of purification of the filtrate can be increased.

  In addition, this invention is not limited to each embodiment mentioned above, A various change is possible as needed.

DESCRIPTION OF SYMBOLS 1,150,170 Filtration apparatus 2 Bag-shaped filter 3 Filter support 4, 174 Filter case 5, 154 Case stand 6, 156 Exchange indicator 7 Mounting ring 8 Filter mounting plate 10 Cylindrical base body 11 buttock 15 Fitting hole 16 鍔Support surface 36 Expansion regulating cylinder 39 Filter receiving plate 45, 181 Case main body 46, 198 Upper lid 56 Locking pin 58, 58A, 58B Opening gasket 59 Outer cylinder part 60 Inner cylinder part 61 Connection part 62, 62a, 62b Seal surface 65 Outlet pipe 66 Outlet 71 Outlet pipe 72 Outlet 81,182 Inlet pipe 82 Inlet 90 Supply pipe 91 Supply port 97 Locking groove 97a First insertion groove 97b Second insertion groove 101, 161 Stand body 102, 162 Stand leg 103 Spring member 103a Tension coil spring 108 Guide rod 109 Guide receiver 109a Rod fitting hole 111 Movement path regulating member 113 Support frame 115 Spring post 116 Spring rod 118 Indicator 118a Pointer 118b Scale 118ba (Full) scale 118bb (Empty) scale 156a Limit switch 156b Indicator lamp 187 Internal piping 190 Cartridge 193 Coagulant aid E Filtrate DE (Liquid content by dewatering) Filtrate G Stock solution K Processed powder D Degassing gas Y (Direction of filter case)

Claims (7)

A bag-like filter that is formed to be stretchable by a knitted stretch yarn and filters the liquid to be filtered;
A cylindrical base and a flange formed at one axial end of the outer peripheral surface of the cylindrical base are provided, and the opening side end of the bag-like filter is detachable so as to cover at least the outer peripheral surface of the hook A filter mounting plate having a mounting ring to be mounted, a fitting hole into which the cylindrical base body is fitted, and a flange support surface for supporting the flange from below, and attaching and detaching the opening side end of the bag-shaped filter Filter support to hold freely,
A case main body formed in a bottomed cylindrical shape with an open top, an upper lid formed in a bottomed cylindrical shape that is detachably attached to the case main body and covers the opening of the case main body, an opening in the case main body An opening gasket for sealing between the end and the upper lid, an inlet for allowing the liquid to be filtered to flow into the filter case, and a flow for allowing the filtrate after filtering by the bag filter to flow out of the filter case A filter case including an outlet, and housing the filter support with the opening side of the bag-shaped filter facing upward, and the length direction of the filter support facing upward and downward,
A case stand that includes a spring member and supports the filter case in a vertically movable manner by the spring force of the spring member;
A replacement indicator that displays the replacement time of the bag-like filter based on the vertical position of the filter case with respect to the case stand;
The filtration apparatus characterized by having. The case stand is
A stand main body formed in a cylindrical shape having a larger diameter than the case main body, and a plurality of stand leg portions that support the stand main body, which is attached to the stand main body at least at an upper part, from below;
A linear guide erected on the upper surface of the stand main body with its length direction directed in the vertical direction, one end is movable along the linear guide, and the other end is attached to the outer peripheral surface of the case main body A movement path regulating member having a slider,
The filtration device according to claim 1, wherein the spring member is a tension coil spring having one end connected to a lower portion of the case body and the other end connected to the stand leg portion above the one end.   The exchange indicator is replaced when the pointer provided in one of the filter case and the case stand and the amount of the solid remaining after being captured inside at least the bag-like filter provided in the other reach a full state. The filtration device according to claim 1 or 2, which is an indicator having a scale indicating that the time has come.   The opening gasket is formed in a bottomed double cylinder shape that opens downward, and the opening portion is attached to the opening end of the case body, and the upper surface of the opening gasket is in close contact with the upper lid. The filtering device according to any one of claims 1 to 3, wherein the sealing surface is flat, or radially outwardly protrudes upward, or an intermediate portion in the inner and outer directions is recessed. .   The filtration device according to any one of claims 1 to 4, wherein the inflow port is provided in the upper lid, and the outflow port is provided in a lower portion of the case main body. The inflow port and the outflow port are provided at the bottom of the case body,
Inside the case body, a lower end communicates with the inflow port, an upper end is disposed above the filter mounting plate, and the filtration target liquid supplied into the filter case through the inflow port is placed in the bag. A cylindrical internal pipe that leads to a position above the opening of the filter is provided,
5. The cartridge according to claim 1, wherein a plurality of openings through which the liquid to be filtered passes are provided in the middle of the internal pipe, and a cartridge in which a coagulant auxiliary agent is accommodated is detachably attached. The filtration apparatus as described in. The upper lid is provided with a supply port for supplying a degassing gas for deliquidating to remove liquid from the solid remaining in the bag-like filter.
The lower part or bottom part of the said case main body is provided with the discharge port which discharges | emits the liquid part which was trapped inside the said bag-shaped filter and removed from the solid which remains outside from the inside of the said filter case. The filtration device according to any one of 6.

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