JP4969539B2 - Filter device and filter - Google Patents

Description

    The present invention is used for a filter device used to remove sludge from a fluid, for example, cutting fluid of a machine tool, or to remove mist-like fine dust (oil mist) generated from a machine tool, and the filter device. Regarding filters.

  Conventionally, in general, the filter is unavoidably clogged. In that case, it was disposable, backwashed, or taken out from the place of use and washed with high pressure water at another place.

  In the case of a single use, the consumption cost is high and a large amount of waste is generated. In the case of backwashing, the clogged filter is clogged, so that the liquid for backwashing is a liquid amount that oozes out of the filter, and it is difficult to obtain sufficient cleaning power. When the hydraulic pressure was increased to enhance the cleaning power, there was a risk of the filter breaking. When cleaning in another place, the work is cumbersome and inefficient.

  In order to solve the above problems, the present applicant has proposed the filter device described below (see Patent Document 1).

  The filter device includes a vertical cylindrical filter that is rotatably supported around a vertical axis, a cleaning nozzle that is directed to the outer surface of the filter from the same direction as the radial direction of the filter, and a pressure of the fluid to be ejected. A rotating nozzle directed to the outer surface of the filter from a direction different from the radial direction of the filter so as to rotate, and the filter is covered by an outer surface of a cylindrical body having a vertical rotation axis, and the outer surface of the body An annular communication passage is formed on the inner surface of the body, and a filtrate discharge pipe is fixed to the inner surface of the body so as to communicate with the communication passage. A horizontal ring-shaped top cover that holds the upper end of the filter on the upper end surface of the body However, the horizontal ring-shaped bottom cover that holds the lower end of the filter is fixed to the lower end surface of the body by a plurality of bolts. It is intended.

  In this filter device, since the body and the filtrate discharge pipe are rotated with the rotation of the filter, the rotational inertial mass is large.

Furthermore, when replacing the filter, it is necessary to detach the top cover and the bottom cover from the body. For that purpose, many bolts had to be removed, and the replacement work of the filter was troublesome.
JP 2008-093783 A

  An object of the present invention is to provide a filter device that has a high filter cleaning effect and that can be easily replaced, and a filter used in the filter device.

  A filter device according to the present invention includes a support shaft fixed upright on a base, and a vertical cylindrical filter with both ends closed detachably attached to the support shaft. A filtered fluid passage to be communicated is formed.

  In the filter device according to the present invention, when the filter is rotated, there is nothing other than the filter that needs to be rotated. Furthermore, since the filtered fluid can be discharged through the support shaft, the discharge mechanism can be designed compactly.

  Furthermore, if the filter is rotatable with respect to the support shaft and the filter device is provided with a plurality of cleaning nozzles directed to the outer surface of the filter, there is no need for backwashing, and the filter can be used in the used state. Can be washed. Therefore, a filter device having a high filter cleaning effect can be obtained.

  When at least one cleaning nozzle is directed to the outer surface of the filter from a direction different from the radial direction of the filter so that the filter can be rotated by the pressure of the ejected fluid, both cleaning and rotation of the filter can be performed. This can be done by ejecting fluid toward the. Therefore, in particular, an actuator or the like is not required for rotating the filter.

  The filter also has a pleated filter element that is formed in a vertically cylindrical shape as a whole so that the inner and outer folds of the pleat are aligned in the circumferential direction, and the upper and lower ends of the filter element are closed, and both ends are predetermined. It is equipped with upper and lower vulcanized rubber end plates that are embedded only in depth and solidified integrally with both ends, and center holes are formed concentrically on both end plates, If the upper and lower bearing bushes, which are slidably fitted to the support shaft, are fitted, the filter element can be held in a desired shape by the upper and lower vulcanized rubber end plates. The filter can be smoothly rotated by the bush.

  In addition, when the outer surface of the support shaft is provided with a step that is in sealing contact with the lower end surface of the lower bearing bush, sealing performance between the support shaft and the lower bearing bush can be ensured.

  The upper end portion of the support shaft is projected above the upper bearing bush, and the upper projecting end portion of the support shaft is covered with a cap. The upper end surface of the upper bearing bush and the lower end surface of the cap are in sealing contact. If it is made, the sealing performance between a support shaft and an upper bearing bush can be ensured.

  Further, the base, the support shaft and the filter are accommodated in a sealed filtration tank, and supply means for supplying a fluid to be filtered to the outside of the filter in the filtration tank and a filtered fluid passage to the filter device. If a discharge means for discharging the filtered fluid is provided outside the filtration tank, the filtration operation can be performed continuously.

  Moreover, the air containing oil mist etc. can be efficiently removed as the to-be-filtered fluid is the gas containing the to-be-filtered solid substance.

  The filter according to the present invention is a filter that is rotatably supported by a support shaft fixed upright on a base, and is formed in a cylindrical shape as a whole so that the inner and outer folds of the pleat are aligned in the circumferential direction. A pleated filter element, and a pair of vulcanized rubber end plates that close both ends of the filter element and that are embedded in the filter element at a predetermined depth and are solidified integrally with the both ends. A center hole is formed concentrically on both end plates, and a bearing bush that is slidably fitted to the support shaft is fitted in the center hole of each end plate.

  In the filter according to the present invention, since the end plate and the bearing bush can be made of members made of different materials, it can be expected to improve the filtration performance and rotation performance of the filter.

  Further, the filter is provided with a punching metal reinforcing member, and the reinforcing member is connected to the vertical cylindrical body wall applied to the inner surface of the filter element and the upper and lower ends of the body wall to the upper and lower end plates. It preferably consists of embedded top and bottom walls.

  According to the present invention, a filter device that has a high filter cleaning effect and that can be easily replaced, and a filter used in the filter device are provided.

  Embodiments of the present invention will be described below with reference to the drawings.

  Referring to FIGS. 1 and 2, a filter unit 12 is accommodated in the upper open filtration tank 11. The filter unit 12 is supported by the base 13. The base 13 includes a pair of vertical side plates 14 that are opposed to each other on both the left and right sides of the filter unit 12 and a horizontal bottom plate 15 that connects the lower ends thereof.

  The filter unit 12 has a horizontal filtered fluid discharge pipe 21 passing close to the lower edges of the side plates 14 and a support fixed upright in the middle of the length of the filtered fluid discharge pipe 21. A shaft 22 and a vertical cylindrical filter 23 closed at both upper and lower ends are rotatably supported by the support shaft 22.

  The filtered fluid discharge pipe 21 is connected to a filtered fluid transport pipe 31 that is passed through the filtration tank 11. The filtered fluid transport pipe 31 is provided with a filtered fluid pump 32.

  A vertical cleaning liquid inlet pipe 33 with a lower end opening is fixed to one of the side plates 14, and a vertical cleaning liquid outlet pipe 34 with a lower end closed is fixed to the other side. The upper openings of the cleaning liquid inlet pipe 33 and the cleaning liquid outlet pipe 34 are connected to each other by a cleaning liquid communication pipe 35. The cleaning liquid communication pipe 35 is provided with a cleaning liquid pump 36.

  The cleaning liquid outlet pipe 34 is provided with two cleaning nozzles 41 at the top and bottom, and one rotating nozzle 42 between the two cleaning nozzles 41. Each cleaning nozzle 41 is directed to the outer surface of the filter 23 from the same direction as the radial direction of the filter 23. The rotating nozzle 42 and the cleaning nozzle 41 are directed to the outer surface of the filter 23 from a direction different from the radial direction of the filter 23.

  The filter 23 includes a filter element 51 whose appearance is a substantially vertical cylindrical shape as a whole, an upper end plate 52 and a lower end plate 53 made of vulcanized rubber that respectively close upper and lower end openings of the filter element 51, and a filter element 51. And a punching metal reinforcing member 54 for integrally reinforcing the upper and lower end plates 52 and 53.

  Upper and lower center holes 61 and 62 are formed in both end plates 52 and 53 so as to be concentric with each other. Upper and lower bearing bushes 63 and 64 are fitted in the center holes 61 and 62. Examples of the material of the bearing bushes 63 and 64 include resins such as nylon and polyethylene, and copper alloys.

  The filter element 51 is manufactured by pleating an elastic material such as paper, fiber, and metal mesh. The filter element 51 has a tubular shape as a whole so that the folds on the inside and outside of the pleat are aligned along the circumferential direction. Is formed.

  The reinforcing member 54 includes a vertical cylindrical body wall 71 applied to the inner surface of the filter element 51, a top wall 72 embedded in the upper and lower end plates 52 and 53, respectively, connected to the upper and lower ends of the body wall 71, and It consists of a bottom wall 73.

  The filter element 51, the end plates 52 and 53, and the reinforcing member 54 are simultaneously integrated by rubber vulcanization molding. As the material of the end plates 52 and 53, liquid rubber or elastic resin (urethane that can be poured in liquid such as urethane rubber or silicon rubber) is adopted. The end portion of the filter element 51 formed into a cylindrical shape is inserted into a cavity corresponding to end plates 52 and 53 of a mold (not shown), and in this state, the above material is poured into the cavity and solidified. As a result, both end portions of the filter element 51 are respectively embedded in the end plates 52 and 53 to a depth corresponding to the thickness thereof, and are fixed integrally with the end portions. The center holes 61 and 62 of the end plate are also formed at the time of rubber vulcanization molding.

  FIG. 3 shows the lower end portion of the support shaft 22 and its peripheral portion in detail. A filtered fluid passage 81 is formed from the lower end surface of the support shaft 22 upward on the axis. A communication hole 82 opened inside the filter 23 is formed at the upper end of the filtered fluid passage 81. The lower end opening of the filtered fluid passage 81 is communicated with the filtered fluid discharge pipe 21.

  An upward stepped portion 83 is provided near the lower end of the outer surface of the support shaft 22. On the other hand, a seal flange 84 is provided at the lower end portion of the outer surface of the lower bearing bush 64. The upper surface of the step portion 83 and the lower surface of the seal flange 84 are in sealing contact. The weight of the filter 23 acts on this contact portion, and the sealing performance between the lower end portion of the support shaft 22 and the lower end plate 53 is thereby maintained.

  FIG. 4 shows the upper end portion of the support shaft 22 and its peripheral portion in detail. The upper end portion of the support shaft 22 protrudes above the upper bearing bush 63, and a cap 85 is put on the upper protruding end portion. A set screw 86 is screwed into the skirt of the cap 85. On the other hand, a seal flange 87 is provided at the upper end of the outer surface of the upper bearing bush 63. The lower end surface of the skirt of the cap 85 and the upper surface of the seal flange 87 are in sealing contact. The sealing performance between the upper end portion of the support shaft 22 and the upper end plate 52 is maintained by positioning the cap 85 so that an appropriate sealing pressure is applied to the contact portion and tightening the set screw 86.

  The fluid to be filtered in the filtration tank 11 is filtered through the filter 23 to become a filtered fluid. A treated filtered fluid is stored in the filter 23. When the filtered fluid pump 32 is operated, the filtered fluid in the filter 23 is sucked into the filtered fluid passage 81 and the filtered fluid discharge pipe 21, and the filtered fluid outside the filter element 51 Passed through.

When the cleaning liquid pump 36 is operated, the fluid to be filtered in the filtration tank 11 is sucked into the cleaning liquid inlet pipe 33 as the cleaning liquid. The sucked cleaning liquid is sprayed straight from the cleaning nozzle 41 to the outer surface of the filter element 51 through the cleaning liquid outlet pipe 34 from the radial direction of the filter element 51, thereby blowing off the contaminants attached to the outer surface of the filter element 51. It is. On the other hand, the cleaning liquid is sprayed from the rotation nozzle 42 to the outer surface of the filter element 51 at a predetermined angle from the radial direction of the filter element 51, and the filter 23 is rotated by the pressure. For example, when the pressure of the cleaning liquid supplied to the rotation nozzle 42 is set to ² to 3 kg / cm ² , the rotation speed of the filter 23 is about 50 rpm.

  Filtration is repeatedly performed at regular intervals, and washing is performed while the filtration is stopped. Alternatively, the cleaning may be performed continuously regardless of whether the filtration is performed or stopped.

  Instead of the above-described fluid to be filtered, a filtered fluid is supplied from a filtered fluid tank (not shown) to the cleaning nozzle 41 and the rotating nozzle 42, and the filter 23 is cleaned and rotated by the filtered fluid. Also good.

  When replacing the filter 23, if the cap 85 is removed from the support shaft 22, the filter 23 can be detached from the support shaft 22 as it is, and can be replaced with another filter.

  FIG. 5 shows a modification of the upper bearing bush 63. A closing wall 91 is integrally provided at the upper end of the upper bearing bush 63. The entire upper end portion of the support shaft 22 is accommodated in the upper bearing bush 63. In this case, the cap 85 shown in FIG. 4 is not necessary.

  Next, a usage example of the filter unit 12 will be described. In the following usage examples, parts corresponding to those described above are denoted by the same reference numerals.

  As shown in FIG. 6, the filtration tank 11 containing the filter unit 12 is composed of a vertical rectangular tubular body wall 101 and a lower narrow quadrangular pyramid bottom wall 102. A lid 101a is placed on the upper end of the body wall 101.

  A to-be-filtered fluid supply pipe 103 and an overflow pipe 104 are connected to the upper end of the body wall 101 so as to face in opposite directions. The cleaning liquid is supplied to the cleaning liquid outlet pipe 34 from the other end of the cleaning liquid communication pipe 35 having one end connected near the lower end of the body wall 101. A recovery tank 105 is connected to the lower end of the bottom wall 102. The recovery tank 105 is provided with an open / close valve 106.

  In this usage example, continuous processing of the fluid to be filtered is possible. In this case, it is preferable when the fluid to be filtered is a cutting fluid of a machine tool. The cutting fluid is almost filled in the filtration tank 11. The entire filter unit 12 is completely submerged in the liquid.

  The filtered fluid is continuously supplied to the filtration tank 11 through the filtered fluid supply pipe 103. The filtered fluid filtered by the filter unit 12 is continuously discharged from the filtered fluid discharge pipe 21. Sludge and the like contained in the cutting fluid are filtered by the filter 23, washed, and stored in the recovery tank 105.

  If the lid 101a is opened, the filter 23 can be easily replaced in the same manner as the filter device shown in FIGS.

  7 and 8 show another example of use of the filter unit 12. This example of use enables a large amount of fluid to be filtered.

  In this usage example, a plurality of the filter units 12 described above are used. The plurality of filter units 12 are arranged in series. A closed loop filtered fluid discharge pipe 111 having a considerable length is formed by the one corresponding to the plurality of filtered fluid discharge pipes 21.

  FIG. 9 shows still another example of use of the filter unit 12. This use example is very similar to the filter device shown in FIG. 6, but is suitable when the fluid to be filtered is a gas such as air containing oil mist.

  The filtration tank 11 includes a body wall 101 and a bottom wall 102 as in the filter device shown in FIG.

  The cleaning liquid is stored only in the bottom wall 102 portion, not the entire filtration tank 11. The entire filter unit 12 is completely lifted from the cleaning liquid.

  In this use example, a filter unit 12 slightly different in structure from the above-described filter unit 12 is used. The support shaft 22 of the filter unit 12 has a pipe shape. The lower end opening of the support shaft 22 is communicated with the filtered fluid discharge pipe 21. A communication port 121 is formed in a portion of the support shaft 22 near the upper end of the peripheral wall.

  The to-be-filtered fluid supply pipe 103 is connected to the middle of the body wall 101. An exhaust pipe 122 is connected to the filtered fluid discharge pipe 21 of the filter unit 12. The exhaust pipe 122 is provided with a blower 123.

  The middle of the bottom wall 102 and the cleaning liquid outlet pipe 34 are connected by a cleaning liquid circulation pipe 124. The cleaning liquid circulation pipe 124 is provided with a cleaning pump 125.

  The cleaning nozzle 41 and the rotating nozzle 42 may be used continuously or intermittently as necessary, as in the case of the filter device shown in FIGS. When the cleaning nozzle 42 and the rotating nozzle 42 are used, there is a possibility that the cleaning liquid enters the filter 23. However, the cleaning liquid that has entered enters the filter 23 due to the centrifugal force of the rotated filter 23. .

  By using the cleaning nozzle 41 and the rotating nozzle 42, the cleaning liquid is adhered to the outer surface of the filter element 51. If the outer surface of the filter element 51 is always wetted with the cleaning liquid, the water will evaporate from the oil mist, and the oil contained in the oil mist, metal powder, and solid particles of grinding stones will be on the outer surface of the filter element 51. It can prevent clogging due to fixation.

1 is a vertical longitudinal sectional view of a filter device according to the present invention. It is the horizontal cross-sectional view. It is a partially expanded sectional view of FIG. FIG. 4 is a partially enlarged cross-sectional view of a portion of FIG. 1 different from the portion shown in FIG. 3. It is sectional drawing which shows the modification of the part shown in FIG. It is sectional drawing which shows the other modification of the same filter apparatus. It is a side view which shows the other modification of the same filter apparatus. It is the same top view. It is sectional drawing which shows the further another modification of the filter apparatus.

Explanation of symbols

13 base
22 Support shaft
23 Filter
81 Filtered fluid passage

Claims (9)

A support shaft fixed upright to the base, and a vertical cylindrical filter with both ends closed detachably attached to the support shaft, and a filtered fluid passage that communicates the inside and outside of the filter with the support shaft. Formed,
A filter device in which a filter is rotatable with respect to a support shaft and is provided with a plurality of cleaning nozzles directed to the outer surface of the filter. The filter device according to claim 1 , wherein at least one cleaning nozzle is directed to the outer surface of the filter from a direction different from the radial direction of the filter so that the filter can be rotated by pressure of the ejected fluid. The filter has a pleated filter element that is formed in a vertically cylindrical shape as a whole so that the inner and outer folds of the pleat are aligned in the circumferential direction, and the upper and lower ends of the filter element are closed, and both ends have a predetermined depth. It is equipped with upper and lower vulcanized rubber end plates that are embedded and solidified integrally with both ends, and center holes are concentrically formed on both end plates, and are supported by the center holes of both end plates. The filter device according to claim 1 or 2 , wherein upper and lower bearing bushes slidably fitted on the shaft are fitted. The filter device according to claim 3 , wherein a step is provided on the outer surface of the support shaft so as to be in sealing contact with the lower end surface of the lower bearing bush. The upper end of the support shaft is projected above the upper bearing bush, and the upper projecting end of the support shaft is covered with a cap, and the upper end surface of the upper bearing bush and the lower end surface of the cap are brought into sealing contact. The filter device according to claim 3 or 4 . The base, the support shaft, and the filter are accommodated in a sealed filtration tank, and are filtered from the inside of the filter to the outside of the filtration tank through the supply means for supplying the fluid to be filtered to the outside of the filter in the filtration tank and the filtered fluid passage. The filter device according to any one of claims 1 to 5 , further comprising discharge means for discharging the spent fluid. The filter device according to claim 6 , wherein the fluid to be filtered is a gas containing solid matter to be filtered.   A pleated filter element that is rotatably supported by a support shaft that is fixed upright on a base, and that is formed in a cylindrical shape as a whole so that inner and outer folds of the pleat are aligned in the circumferential direction; A pair of vulcanized rubber end plates that are closed at both ends of the filter element and are both solidified integrally with the both ends of the filter element. A filter in which a central bush is formed concentrically, and a bearing bush that is slidably fitted to a support shaft is fitted in the central hole of each end plate. A reinforcing member made of punching metal is provided, and the reinforcing member is connected to the vertical cylindrical body wall applied to the inner surface of the filter element and the upper and lower ends of the body wall and embedded in the upper and lower end plates. 9. A filter according to claim 8 , comprising a wall and a bottom wall.

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