JPH0576507U - Filter device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a filter device capable of cleaning a cylindrical filter in a simple manner. A device case, a cylindrical filter rotatably supported inside the device case, an inflow path for inflowing liquid between the device case and the cylindrical filter, and a liquid from the cylindrical filter. An outflow passage that flows out of the device case, a suction pipe that is provided between the device case and the cylindrical filter, and has a suction port that sucks the adhered matter adhering to the outer peripheral surface of the cylindrical filter, and the suction pipe. A scraper that is provided on the rear side in the rotation direction of the cylindrical filter with respect to the suction port of the pipe and comes into contact with the outer peripheral surface of the cylindrical filter to scrape off adhering substances adhering to the outer peripheral surface of the cylindrical filter when the cylindrical filter rotates. It is characterized by comprising:

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filter device using a cylindrical filter.

[0002]

[Prior Art]

 For example, in a hydraulic circuit, a filter device is provided to remove foreign matter contained in oil flowing in a pipeline.

As a filter device of this type, a cylindrical filter is provided inside the device case, and the liquid introduced into the device case is passed from the outside of the cylindrical filter to the inside to be contained in the liquid. There is a filter device of a type that removes foreign matter to be trapped with a cylindrical filter and then causes liquid to flow from the inside of the cylindrical filter to the outside of the device case. This filter device is generally widely used because the filter area can be efficiently secured by the cylindrical filter.

Conventionally, in this type of filter device, when a large amount of foreign matter contained in the liquid adheres to the cylindrical filter to lower the filter efficiency, the flow of the liquid in the pipeline is stopped and the device case is closed. Take out the cylindrical filter opened inside the case, take it out of the case, wipe off the foreign matter adhering to the cylindrical filter with a brush, etc. to clean it, and then again inside the device case. The method of accommodating in is done.

[0005]

[Problems to be solved by the device]

 However, when the cylindrical filter is cleaned by such a method, the apparatus case is opened and the cylindrical filter is taken out after each cleaning, and after cleaning, the cylindrical filter is housed again and the apparatus case is removed. There is a problem that the cleaning work requires a lot of work because the cleaning work is performed and the foreign matter adhering to the cylindrical filter is manually removed. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a filter device capable of cleaning a cylindrical filter by a simple method.

[0006]

[Means for Solving the Problems]

 To achieve the above object, the filter device of the present invention comprises a device case, a cylindrical filter rotatably supported inside the device case, and a device between the device case and the cylindrical filter. Is provided between the device case and the cylindrical filter, and an inflow path through which the liquid flows in and an outflow path through which the liquid flows out from the cylindrical filter to the outside of the device case, and is attached to the outer peripheral surface of the cylindrical filter. The suction pipe is formed with a suction port for sucking the adhered substances, and the suction pipe is provided in contact with the outer peripheral surface of the cylindrical filter provided on the rear side in the rotation direction of the cylindrical filter with respect to the suction port. It is characterized by comprising a scraper for scraping off the adhered matter adhering to the outer peripheral surface of the cylindrical filter when the cylindrical filter is rotated.

The scraper is provided so as to face the suction port and cover the suction port. The suction pipe is provided along the longitudinal direction of the cylindrical filter, and the suction port is formed along the longitudinal direction of the cylindrical filter.

[0008]

[Action]

 According to the above configuration, the following operation can be obtained.

First, the cylindrical filter is rotated. At this time, the scraper is used to scrape off the deposits on the outer peripheral surface of the cylindrical filter. At the same time, the liquid flows from the inside of the cylindrical filter to the outside, and then flows out from the suction pipe to the outside. When the liquid passes through the cylindrical filter, the deposits scraped off by the scraper flow into the suction pipe together with the liquid and flow out to the outside. Further, when the liquid passes through the cylindrical filter, the deposit adhered to the cylindrical filter is separated from the cylindrical filter due to the pressure thereof, flows into the suction pipe, and is discharged to the outside.

Then, the deposits attached to the cylindrical filter are peeled off in the entire circumferential direction by the rotation of the cylindrical filter. Therefore, it is possible to perform cleaning for reliably removing the deposits adhering to the cylindrical filter while the cylindrical filter is housed inside the device case.

When the suction port of the suction pipe is opened at a position not facing the outer peripheral surface of the cylindrical filter and the scraper is provided so as to face the suction port and cover the suction port, it is scraped by the scraper. The adhering substance is prevented from flowing by the scraper in the direction away from the suction pipe, and is forced to flow into the suction pipe. Also, the deposits that are separated when the liquid passes through the cylindrical filter are also forcibly guided by the scraper from the suction port to the suction pipe. Therefore, the adhered substances separated from the cylindrical filter can be discharged to the outside from the suction pipe without being diffused inside the device case.

If the suction pipe is provided along the longitudinal direction of the cylindrical filter and the suction port is formed along the longitudinal direction of the cylindrical filter, the cylindrical filter is rotated by the rotation of the cylindrical filter. It is possible to efficiently remove deposits in the entire circumferential direction of the filter.

[0013]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. 1 and 2 show the entire filter device.

Reference numeral 1 in the drawing denotes an apparatus case, which is provided in an upright state. It is composed of a cylindrical body 2, a lower end plate 3 and a lid 4. The lower end plate 3 is fixed to the lower end of the main body 2, and a cylindrical body 5 is fixed to the center of the lower end plate 3 by penetrating in the vertical direction. The lid 4 is detachably attached to the upper end of the main body 2 and is fixed to the main body 2 with bolts 6. A bearing body 7 is fixed to the central portion of the lid 4, and a handle 8 is provided on the outside.

An inflow port 9 is formed in an upper part of the device case 1 main body 2, and an inflow pipe 10 is connected to the inflow port 9. An outlet 11 is formed in the cylindrical body 5, and an outlet pipe (not shown) is connected to the outlet 11. The device case 1 is placed on a base 12 and the lower end plate 3 is fixed by bolts 13.

Reference numeral 14 denotes a cylindrical filter, which is provided inside the apparatus case 1 in a standing state. As shown in FIGS. 4, 6 and 7, the cylindrical filter 14 is composed of a cylindrical body 15, lids 16 and 17 attached to the upper end opening and the lower end opening of the cylindrical body 15, and a wire 18. .

A plurality of blades 19 extending in the longitudinal direction are formed on the outer peripheral portion of the cylindrical body 14 side by side at intervals in the circumferential direction, and a plurality of blades 19 are formed in each portion located between the blades 19. The holes 20 are formed side by side in the longitudinal direction. For example, the wire material 18 having a triangular cross section is circumferentially wound around the outer ends of the blades 19 of the cylindrical body 14, and is wound spirally over the entire longitudinal direction. A large number of notches 19a are formed side by side in the longitudinal direction at the outer end of each blade 19, and the wire rod 18 is engaged with these notches 19a.

By providing the blades 19 and the wire rods 18 in this manner, the outer ends of the blades 19 and the winding portions are wound around the wire rod 18 over the entire length of the outer peripheral surface of the cylindrical filter 14 in the longitudinal and circumferential directions. Combined in a grid. Therefore, a quadrangular hole is formed by the combination of the outer ends of the blades 19 and the wire 18, and a large number of these holes are formed side by side along the entire longitudinal and circumferential directions of the outer peripheral surface of the cylindrical filter 2. ..

A shaft 21 is provided at the center of the upper end cover 16, and the shaft 21 is rotatably supported by a bearing body 7 provided on the cover 4 of the device case 1. At the central portion of the lid 17 at the lower end, a cylindrical portion 17a is formed in the up-down direction to communicate the inside and the outside. The tubular portion 17a is rotatably supported by the tubular body 5 of the lower end plate 3 of the device case 1.

A rotary shaft 22 is arranged in the up-down direction inside the tubular body 5 of the device case 1, and the rotary shaft 22 is provided with a bearing 23 provided at the bottom of the tubular body 5 and the tubular body 5. It is rotatably supported by a frame 24 provided in the middle part of the. A gear 25 is attached to a portion of the rotary shaft 21 protruding from the cylindrical body 5, and the gear 25 meshes with a gear 26. The gear 26 is attached to the output shaft of the electric motor 27. The cylindrical filter 14 is rotated in the direction of the arrow shown.

In the figure, 28 is an upper filter support and 29 is a lower filter support. As shown in FIG. 3, the upper filter support 28 is arranged above the upper lid 16 of the cylindrical filter 14 along the diameter direction of the cylindrical filter 14, and the shaft 21 is inserted into a hole 28a formed in the center. ing. As shown in FIG. 5, the lower filter support body 29 is arranged below the lower lid 17 of the cylindrical filter 14 along the diametrical direction of the cylindrical filter 14, and the cylindrical portion 17a is inserted into a hole 29a formed in the center. Has been done.

Between the one end of the upper filter support 28 and the one end of the lower filter support 29, a connecting rod 30 is arranged laterally along the longitudinal direction of the cylindrical filter 14, and the connecting rod 30 is connected to the connecting rod 30. 30 is connected to each support 28, 29 by a nut 31. Between the other end of the upper filter support 28 and the other end of the lower filter support 29, a suction pipe 32 is arranged laterally along the longitudinal direction of the cylindrical filter 14, and the suction pipe 32 is It is connected to each support 28, 29. The suction pipe 32 is integrally combined with the scraper 33. The suction pipe 32 and the scraper 33 will be described with reference to FIGS. 1, 4, 6, and 7.

The suction pipe 32 is a straight pipe having a length larger than the longitudinal length of the cylindrical filter 14, and has an upper end closed and a lower end opened. The upper end of the suction pipe 32 is fixed to the other end of the upper filter support 28 by a bolt 34, and the lower part thereof is abutted against the other end of the lower filter support 29. At the lower end of the suction pipe 32, a mounting pipe 35 is screwed from the lower side of the lower filter support 29 through a hole 29b formed in the support 29, and the suction pipe 32 is lowered by tightening the mounting pipe 34. It is fixed to the filter support 29.

A suction port 36 is formed in the wall portion of the suction pipe 32 along the longitudinal direction of the cylindrical filter 2, and the suction port 36 faces the rear side of the cylindrical filter 14 in the rotation direction. It is opened to the side of the cylindrical body 15.

A connection pipe 37 is attached to the lower end plate 3 of the device case 1 below the suction pipe 32. An attachment pipe 36 connected to the suction pipe 32 is removably inserted into the connection pipe 37 at one end of the discharge pipe 37. A discharge pipe 38 is connected to the connecting pipe 37. The discharge pipe 38 is connected to a tank (not shown) outside the device case 1, and an opening / closing valve and a filter (not shown) are connected to the tank until reaching the tank.

The scraper 33 is made of a metal plate having corrosion resistance, has a hook-shaped cross section, and has a length slightly larger than the suction port 36 of the suction pipe 32. The scraper 33 is arranged along the longitudinal direction of the suction pipe 32 so as to face the suction port 36 on the rear side in the rotation direction of the cylindrical filter 2 with respect to the suction port 36. One side edge of the scraper 33 comes into contact with the wall portion of the suction pipe 32 and is fixed by a bolt 39 through a holding plate 46, and the other side edge that forms a hook is attached to the outer peripheral surface of the cylindrical body 15 of the cylindrical filter 14. Contact with elasticity.

Further, as shown in FIG. 6, protrusions 40 a and 40 b are formed on the upper and lower ends of the suction pipe 32 to cover the upper and lower ends of the scraper 33 from the outside. Therefore, an elongated space along the longitudinal direction of the cylindrical filter is formed between the suction pipe 32, the scraper 33, and the protrusions 40a and 40b.

In this way, the cylindrical filter 14 is supported by the assembled structure including the upper filter support 28, the lower filter support 29, the connecting rod 30, and the suction pipe 32.

A pair of guide rails 41 on one side and a pair of guide rails 42 on the other side are formed in the main body 2 of the device case 1 at positions facing each other with the central axis interposed therebetween along the vertical direction. .. Both ends of the upper filter support 28 and both ends of the lower filter support 29 are slidably inserted into one pair of guide rails 41 and the other pair of guide rails 42, respectively. Therefore, both ends of the upper filter support 28 and the lower filter support 29 are prevented from rotating about the central axis of the cylindrical filter and are supported so as to be movable in the vertical direction. As a result, the assembly structure composed of the upper filter support 28, the lower filter support 29, the connecting rod 30, and the suction pipe 32 is supported by the apparatus case 1. In the figure, 43 is a drain pipe, 44 is a packing, and 45 is a bearing body.

The filter device configured as described above is provided, for example, in a pipeline of a hydraulic circuit. Then, the inflow pipe 10 and the outflow port 11 of the device case 1 are connected to the pipe line. Further, the discharge pipe 38 is connected to the tank as described above. This tank is used to store the oil used in the hydraulic circuit, and the tank is open to the atmosphere. The operation of the filter device will be described. The oil flow will be described.

The oil flowing through the pipe flows through the inflow pipe 6 from the inflow port 9 to the inside of the device case 1 between the peripheral wall of the device case 1 and the cylindrical filter 14 to form a cylindrical shape. From the outer periphery of the filter 14 to the cylindrical filter 14, it passes through a large number of holes formed by the blades 19 and the wire rods 18 of the cylindrical body 8 and then through the holes 20 formed in the cylindrical body 15 to form a cylinder. It flows into the body 15.

The deposits contained in the oil are removed from the outer periphery of the cylindrical filter 14 by a large number of holes formed by the blades 19 of the cylindrical body 15 of the cylindrical filter 14 and the wire rods 18, and the roots of each blade 19 are removed. It adheres to the outer end and the outer surface of each winding part of the wire 18. The oil that has flowed into the inside of the cylindrical filter 14 flows through the cylindrical portion 17a of the lid 17 at the lower end of the cylindrical filter 14 into the cylindrical body 5 of the equipment case 1, and then from the outlet 11 to the pipeline again. Spill to. Next, the operation of cleaning the cylindrical filter 14 will be described. A valve provided between the suction pipe 32 and the tank is opened to maintain the oil amount in the main circuit. Therefore, the suction pipe 32 communicates with the tank and with the atmosphere.

Here, the pressurized oil flows into the inside of the cylindrical filter 14, and the pressure is the sum of the atmospheric pressure and the pressurized pressure. On the other hand, the inside of the suction pipe 32 is at atmospheric pressure because it is open to the atmosphere in the tank.

Therefore, due to the difference between the internal pressure of the cylindrical filter 14 and the internal pressure of the suction pipe 32, the oil inside the cylindrical filter 14 is formed in the cylindrical shape near the suction port 36 of the suction pipe 32. It is sucked out of the cylindrical filter 14 through a large number of holes formed by each blade 19 of the cylindrical body 8 and the wire rod 18 in the portion of the filter 14, and then flows into the inside of the suction pipe 32 from the long hole 20. To do. Further, the oil flows out of the lower end opening of the suction pipe 32 into the tank through the pipe line.

Further, at the same time as the oil flows as described above, the gear 26 is rotated by the electric motor 27, and this rotation is transmitted to the rotary shaft 22 via the gear 25. The rotation of the rotary shaft 22 causes the cylindrical filter 14 to be supported by the device case 1 and rotate in a zigzag manner. As a result, each portion in the circumferential direction of the cylindrical filter 14 passes through the position facing the suction pipe 32.

Here, the edge of the scraper 33 is in contact with the outer peripheral surface of the cylindrical body 15 of the cylindrical filter 14. Therefore, when the cylindrical filter 14 rotates, the edge of the scraper 33 comes into sliding contact with the outer peripheral surface of the cylindrical body 15. Then, the adhered matter that adheres to the outer ends of the blades 19 of the cylindrical body 8 and the outer peripheral surfaces of the winding portions of the wire 18 is scraped off by the tips of the scrapers 33.

The suction port 36 of the suction pipe 32 is opened to a position that does not face the outer peripheral surface of the cylindrical filter 14, and the scraper 33 faces the suction port 34 and covers the suction port 34. For this reason, the scraper 33 prevents the adhered matter scraped off by the scraper 33 from flowing away from the suction pipe 32. Therefore, the deposits scraped off by the scraper 33 are carried to the oil flowing into the suction pipe 32 and forcedly flowed into the suction pipe 32 through the suction port 34.

Therefore, the adhered substances separated from the cylindrical filter can be discharged to the outside from the suction pipe without being diffused inside the device case. When the suction pipe 32 is provided along the longitudinal direction of the cylindrical filter 14 and the suction port 33 is formed along the longitudinal direction of the cylindrical filter 14, rotation of the cylindrical filter 14 causes the cylindrical filter 14 to rotate. By allowing each portion in the circumferential direction to pass through the suction pipe, it is possible to efficiently remove deposits in the entire circumferential direction of the cylindrical filter 14.

Further, when the oil passes through the respective positions in the circumferential direction of the cylindrical filter 14 corresponding to the suction ports 36 of the suction pipe 32, the blades 19 of the cylindrical body 15 and the wire 11 of the cylindrical body 15 at the passing portions thereof. The adhered matter adhering to the outer surface of each winding portion is peeled off. The adhered substance peeled off is conveyed to the suction pipe 32 by oil.

The deposits peeled off from the cylindrical filter 14 are carried together with the oil from the suction pipe 32 through the discharge pipe 38 and collected by the filter. As a result, the oil reaches the tank after the deposits are removed. Then, as the cylindrical filter 1 makes one rotation, the adhered matter adhered to the outer peripheral surface of the cylindrical body 15 is removed over the entire circumferential direction. Therefore, it is possible to surely remove the deposits attached to the cylindrical filter 14 while the cylindrical filter 14 is housed inside the apparatus case 1.

In this filter device, when oil normally flows through the pipeline, the valve provided between the suction pipe 32 and the tank is opened with a certain opening so that the suction pipe 32 communicates with the atmosphere. At the same time, the cylindrical filter 14 is rotated by the rotating device. Therefore, the cleaning of the cylindrical filter 14 is performed in parallel while the oil is flowing through the pipeline.

Further, in this embodiment, the cylindrical filter 14 and the suction pipe 32 can be integrally put in and taken out of the mounting case 1. That is, the lid 4 of the device case 1 is removed from the main body 2 to open the upper end of the main body 2. The assembled structure consisting of the upper filter support 28, the lower filter support 29, the connecting rod 39, and the suction pipe 32 is pulled up along the guide rails 41, 42 formed inside the main body 2 of the device case 1. The cylindrical filter 14 and the suction pipe 32 can be taken out to the outside of the main body 2 together by taking them out from the upper end of the main body 2.

The attachment pipe 35 connected to the suction pipe 32 is separated from the connection pipe 37 provided in the device case 1. When the cylindrical filter 14 and the suction pipe 32 are accommodated in the device case 1, the reverse operation is performed. Therefore, handling of the cylindrical filter 14 and the suction pipe 32 is convenient. The filter device of the present invention is not limited to the contents of the above-mentioned embodiment, and various modifications can be carried out.

[0044]

[Effect of the device]

 As described above, according to the filter device of the present invention, while rotating the cylindrical filter, the scraper scrapes off the adhering substances adhering to the cylindrical filter, and the cleaning liquid flows from the inside of the cylindrical filter to the outside. When it flows out through the hole of the pipe, it removes the adhering substances that have adhered to the cylindrical filter and discharges it from the pipe to remove the adhering substances that adhere to the entire circumference of the cylindrical filter. You can Therefore, it is possible to reliably remove the deposits attached to the cylindrical filter while the cylindrical filter is housed inside the apparatus case.

[Brief description of drawings]

FIG. 1 is a sectional view showing the overall configuration of a filter device according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along the line BB of FIG.

5 is a sectional view taken along the line CC of FIG.

FIG. 6 is a diagram showing a cylindrical filter viewed from the direction D in FIG. 1.

FIG. 7A is an enlarged view of an E portion of FIG. (B)
FIG. 2 is an enlarged view of a portion F of FIG. 1.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Device case, 9 ... Inflow port, 11 ... Outflow port, 14 ... Cylindrical filter, 32 ... Suction pipe, 33 ... Scraper.

Claims (3)

[Scope of utility model registration request] 1. An apparatus case, a cylindrical filter rotatably supported inside the apparatus case, an inflow path for inflowing a liquid between the apparatus case and the cylindrical filter, and a liquid. An outflow passage that flows out from the cylindrical filter to the outside of the device case, and a suction port that is provided between the device case and the cylindrical filter and that absorbs deposits adhering to the outer peripheral surface of the cylindrical filter are formed. And a suction filter provided on the rear side of the suction port of the suction pipe in the rotational direction of the cylindrical filter and contacting the outer peripheral surface of the cylindrical filter when the cylindrical filter rotates. A filter device comprising a scraper for scraping off adhering substances adhering to the outer peripheral surface of the. 2. The filter device according to claim 1, wherein the scraper is provided so as to face the suction port. 3. The filter device according to claim 1, wherein the suction pipe is provided along a longitudinal direction of the cylindrical filter, and the suction port is formed along a longitudinal direction of the cylindrical filter.