JP2021023885A - Filter cleaning device - Google Patents

Abstract

To provide a filter cleaning device which can easily and efficiently clean a cylindrical filter, makes a driving source such as a motor unnecessary and has simple constitution of the device itself.SOLUTION: A filter cleaning device comprises: a casing 20 which forms a sealed space 20a in the inside thereof; a rotary stand 30 which is provided inside the casing 20 and rotatably supports a cylindrical filter 10 around a shaft; a jetting unit 40 which is provided inside the casing 20 and jets compressed air toward an outer circumferential portion of the cylindrical filter 10 supported on the rotary stand 30; and an exhaust portion 50 provided on a position opposite to the jetting unit 40 with the cylindrical filter 10 interposed between the jetting unit and the exhaust portion, the cylindrical filter 10 is rotated by compressed air jetted from the jetting unit 40 and sprayed against the outer circumferential portion of the cylindrical filter 10 and dust attached to the cylindrical filter 10 is released by centrifugal force and is scattered.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cleaning device for a cylindrical filter in which dust has accumulated.

At the manufacturing site, dust is generated at various places when the product is manufactured, and a dust collector for collecting the dust is often operated. For example, at a steel manufacturing site, metal powder is likely to be generated when cutting a steel material, and if an impact is applied to a place where the metal powder is accumulated, the metal powder will fly. Such metal powder (dust) not only causes defects in the product, but may also have an adverse effect on the human body. In addition, most of the troubles of the sensor attached to the manufacturing apparatus are caused by false detection due to dust adhesion. Therefore, it is necessary to properly collect the dust with a dust collector.

A hose for suction is installed near the place where dust is generated, and the dust is guided to a dust collector connected to the hose. A filter is usually installed in the dust collector, and dust is collected by the filter, so that the filtered air is discharged to the outside of the dust collector. Since the dust collecting capacity of the dust collector is reduced due to the accumulation of dust on the filter, it is necessary to clean the filter when the filter is used for a certain period of time or more.

Compressed air (hereinafter referred to as "air") is often used to clean the filter.
For example, Patent Document 1 describes an invention in which a nozzle is inserted through a hole (nozzle insertion portion) provided in the wall surface of a dust collector, and air is directly injected into a cylindrical filter installed inside the dust collector to remove dust. Is described.
Further, in Patent Document 2, a cylindrical filter taken out from a dust collector is rotated by a motor, and air is blown from the axial direction and the circumferential direction of the cylindrical filter to clean the filter body and separately discharge dust. An invention for removing dust by sending it from a (suction collector) to a separation device is described.

Japanese Unexamined Patent Publication No. 2002-228637 Japanese Unexamined Patent Publication No. 6-74112

As mentioned above, air is used to clean the filter. However, when the cylindrical filter is fixed, the tip portion is bent and / or curved in an L shape in order to clean the opposite side of the cylindrical filter as in the invention described in Patent Document 1. A hook-shaped nozzle is required. Since it becomes difficult to operate the nozzle, it is difficult to say that the filter can be easily cleaned in such a case.
Cleaning the filter can be easily performed by cleaning the cylindrical filter with air while rotating it around its axis. Examples of the method for cleaning the rotating cylindrical filter include the invention described in Patent Document 2 described above. In the present invention, the cylindrical filter is rotated by a motor. A drive source is also required to operate the motor. Further, in the invention described in Patent Document 2, the device has a structure in which air is blown from the axial direction of the cylindrical filter, and the device itself becomes complicated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a filter cleaning device that can easily and efficiently clean a cylindrical filter, does not require a drive source such as a motor, and has a simple structure of the device itself. And.

In order to achieve the above object, the filter cleaning device of the present invention is a filter cleaning device that cleans a cylindrical filter.
A casing that forms a closed space inside,
A support portion provided inside the casing and rotatably supporting the cylindrical filter around the axis,
An injection unit provided inside the casing and injecting compressed gas toward the outer peripheral portion of the cylindrical filter supported by the support portion.
A cylindrical filter supported by the support portion is sandwiched in the radial direction thereof, and an exhaust portion provided at a position facing the injection portion is provided.
The compressed air injected from the injection unit and blown onto the outer peripheral portion of the cylindrical filter causes the cylindrical filter to rotate, and dust adhering to the cylindrical filter is blown away.

Here, the support portion may be a turntable on which a cylindrical filter is installed, or may be a shaft-shaped member that rotatably supports the cylindrical filter. When the support portion is a turntable, it is preferable that the cylindrical filter is installed on the turntable so that its axis and the rotation center axis of the turntable are aligned with each other. When the support portion is a shaft-shaped member, the shaft-shaped member may be inserted into the central hole of the cylindrical filter so that the cylindrical filter can rotate around the axis of the shaft-shaped member. Further, the shaft-shaped member may be rotatable around the shaft, and the central hole of the cylindrical filter may be fitted into the shaft-shaped member. Further, the cylindrical nozzle may be formed in a cylindrical shape having a central hole, or may be formed in a cylindrical shape having no central hole.

The injection unit may have a plurality of injection nozzles arranged at predetermined intervals in the axial direction of the cylindrical filter, or may have slit-shaped injection nozzles extending in the axial direction of the cylindrical filter. You may. The plurality of injection nozzles and the slit-shaped injection nozzles may be arranged in one row parallel to the axial direction of the cylindrical filter, or may be arranged in a plurality of rows. In this case, even when the compressed air is applied to the same height position of the cylindrical filter, the compressed air can be blown to different positions by shifting the position to the left or right, and the dust can be separated, that is, blown off more efficiently. ..
In order to rotate the cylindrical filter by the compressed air blown from the injection part to the outer periphery of the cylindrical filter, it is necessary to incline the cylindrical filter by an angle of 24 ° to 34 ° with respect to the normal direction in the circular cross section of the cylindrical filter. preferable.
Further, the compressed air may be injected while moving the injection nozzle in the axial direction of the cylindrical filter, that is, the compressed air may be injected while being scanned in the axial direction of the cylindrical filter.
Further, although air is preferably used as the gas of the compressed gas injected from the injection unit, it may be a gas other than air.
The exhaust portion exhausts the compressed gas blown to the outer peripheral portion of the cylindrical filter and the dust blown off by the compressed gas to the outside, and such an exhaust portion is provided on the wall portion of the casing. The exhaust port is suitable. Although one exhaust port may be provided, it is preferable to provide a plurality of exhaust ports. Further, it is preferable to connect a suction device to the exhaust port.

The cleaning device according to the present invention may be a cleaning device as a function of the dust collector as in the invention described in Patent Document 1, and is a cylinder taken out from the dust collector as in the invention described in Patent Document 2. It may be a cleaning device that separately cleans the shape filter.

In the present invention, the compressed air injected from the injection unit and blown to the outer peripheral portion of the cylindrical filter rotates the cylindrical filter, and the dust adhering to the cylindrical filter is separated from the cylindrical filter by centrifugal force. At the same time, the compressed air is blown toward the exhaust section, and the compressed air and dust are exhausted from the exhaust section to the outside. Therefore, the cylindrical filter can be cleaned easily and efficiently, and the drive source such as a motor can be used. It is unnecessary and the configuration of the device itself becomes simple.
In addition, the pressure of the compressed gas from the injection section guides the dust to the exhaust section, but if a suction device is connected to the exhaust section, the dust can also be guided to the exhaust section by the suction force and is effectively discharged. it can.

In the configuration of the present invention, the exhaust portion is arranged at the center of the axial height of the cylindrical filter arranged with the shaft facing up and down.
An upper inclined wall arranged inside the casing above the exhaust portion so that the cross-sectional area of the closed space becomes smaller from the injection portion toward the exhaust portion.
A downwardly sloping wall arranged inside the casing so as to incline downward from the exhaust part and downward from the exhaust part.
It may have a dust box provided below the lower end of the downward inclined wall.

According to such a configuration, the upper inclined wall reduces the cross-sectional area of the closed space from the injection part to the exhaust part, so that the compressed air is throttled and the pressure rises, so that dust is removed from the exhaust part. It becomes easier to discharge.
Further, if the dust collides with the upper inclined wall, the dust will fall downward. This can be easily exhausted by catching it in the exhaust section.
Further, since it has a downwardly inclined wall that inclines downward from the exhaust part side below the exhaust part, dust that is not discharged from the exhaust part and falls further downward can be caught by the downwardly inclined wall and guided to the dust box. ..
The exhaust unit can mainly catch small (light) dust, and the dust box can mainly catch large (heavy) dust, so that dust treatment can be performed appropriately.

Further, in the configuration of the present invention, a plurality of the support portions are arranged in parallel.
It has the injection part for each of the support parts,
The injection portions adjacent to each other in the parallel direction are configured to inject compressed gas toward the outer peripheral portion of the cylindrical filters so as to rotate the cylindrical filters adjacent to each other in the parallel direction in opposite directions. May be good.

In order to configure the injection parts as described above, for example, the injection directions of the compressed gases injected from the injection parts adjacent to each other in the parallel direction are substantially separated from each other toward the cylindrical filters adjacent to each other in the parallel direction. You can either point it in the shape of a letter, or point it in a substantially inverted C shape so that it approaches each other. When the injection direction of the compressed gas is directed to a substantially C shape, the outer peripheral portion of the outer peripheral portion of the cylindrical filter in which the injected compressed gas is adjacent in the parallel direction is opposite to the inner outer peripheral portion facing each other. When the injection direction of the compressed gas is directed to a substantially inverted C shape, the injected compressed gas is applied to the inner outer peripheral portions of the cylindrical filters adjacent to each other in the parallel direction, which face each other. You just have to make it sprayed.

According to such a configuration, since the plurality of support portions are arranged in parallel, the plurality of cylindrical filters can be efficiently cleaned by the compressed gas injected from the injection portion.
Further, since the injection portions adjacent to each other in the parallel direction are configured to inject compressed gas toward the outer peripheral portion of the cylindrical filters so as to rotate the cylindrical filters adjacent to each other in the parallel direction in opposite directions. Since the compressed air does not flow in the opposite directions but flows in the same direction between the cylindrical filters adjacent to each other in the parallel direction, the rotation of the cylindrical filters is not braked by the compressed air. Therefore, the dust adhering to the cylindrical filter can be easily blown off and cleaned.

According to the present invention, the cylindrical filter can be easily and efficiently cleaned by compressed air, and a drive source such as a motor is not required, which simplifies the configuration of the device itself.

The filter cleaning device which concerns on 1st Embodiment is shown, (a) is a side sectional view, (b) is a plan sectional view of a main part. It is a side sectional view which shows the filter cleaning apparatus which concerns on 2nd Embodiment. A modification of the filter cleaning device of the embodiment is shown, in which (a) a plan sectional view of a main part showing a case where the injection nozzles are arranged in a V shape, and (b) an inverted C shape of the injection nozzles. It is a plan sectional view of the main part which shows the case where it is arranged in.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First Embodiment)
FIG. 1 shows a filter cleaning device according to the first embodiment, (a) is a side sectional view, and (b) is a plan sectional view of a main part.
As shown in FIG. 1A, the filter cleaning device uses compressed air to clean the cylindrical filter 10. The cylindrical filter 10 includes a cylindrical filter main body 10a and flange portions 10b and 10b fixed to the axial end portion of the filter main body 10a.

Further, the filter cleaning device includes a casing 20, a turntable (support portion) 30, an injection portion 40, an exhaust portion 50, and a suction device 60.
The casing 20 forms a closed space 20a inside, and is formed in a rectangular box shape. The upper wall portion 21 of the casing 20 is provided with an insertion port 21a for inserting the cylindrical filter 10 inside the casing 20, so that the lid 22 airtightly closes the insertion port 21a in the insertion port 21a. And it is attached detachably. A packing (not shown) is attached to the outer peripheral portion of the lid 22, and the packing is brought into close contact with the opening edge of the insertion port 21a so that the insertion port 21a is airtightly closed by the lid 22.

The bottom wall portion 23 of the casing 20 is formed thicker than the upper wall portion 21 and the left and right side wall portions 24 and 25. A turntable 30 is provided inside the casing 20, and the turntable 30 is fixed to the upper surface of the bottom wall portion 23 of the casing 20.
The turntable 30 rotatably supports the cylindrical filter 10 around an axis, and has a fixing plate 31 fixed to the bottom wall portion 23 and a disk-shaped rotating plate 32 for rotation. The plate 32 has a shaft portion 32a that projects downward at the center of the lower surface thereof. On the other hand, a circular recess is formed on the upper surface of the fixing plate 31, and the bearing 33 is provided in the recess. The bearing 33 rotatably supports the shaft portion 32a in the forward and reverse directions. Therefore, the rotating plate 32 is rotatably supported around the shaft by the shaft portion 32a.
A cylindrical filter 10 is arranged on the upper surface of the rotating plate 32, and a flange portion 10b at the lower end of the cylindrical filter 10 is positioned and fixed to the upper surface of the rotating plate 32 by a fixing means (not shown). In this state, the rotation axis (shaft portion 32a) of the rotating plate 32 and the axis of the cylindrical filter 10 coincide with each other.

The injection unit 40 is provided inside the casing 20 and injects compressed air toward the outer peripheral portion of the cylindrical filter 10 rotatably supported by the turntable 30. The injection portion 40 is arranged between the cylindrical filter 10 supported by the turntable 30 and the left wall portion 24 of the casing 20. Further, the injection portion 40 has a square rod-shaped pillar portion 41 and a plurality of cylindrical injection nozzles 42 provided on the pillar portion 41 at predetermined intervals in the axial direction (vertical direction) of the cylindrical filter 10. , The lower end of the pillar 41 is fixed to the bottom wall 23.
An air supply pipe 43 is connected to the pillar portion 41. The air supply pipe 43 has a base end connected to a compressed air supply device such as a compressor (not shown), and a tip portion airtightly penetrating the left wall portion 24 is connected to a central portion in the longitudinal direction of the pillar portion 41. The inside of the pillar portion 41 communicates with the injection nozzle 42, and the compressed air supplied from the air supply pipe 43 passes through the inside of the pillar portion 41 and is injected from the injection nozzle 42.

As shown in FIG. 1 (b), the axis of the injection nozzle 42 has a predetermined angle α, for example, 24 ° to the normal of the cylindrical filter 10 in a cross section (horizontal plane) orthogonal to the axis of the cylindrical filter 10. It is tilted by an angle α of 34 °.
The compressed air A injected from the injection nozzle 42 is sprayed onto the outer peripheral portion of the filter body 10a of the cylindrical filter 10 while spreading in a substantially conical shape, whereby the cylindrical filter 10 is axially rotated by the rotating plate 32 of the turntable 30. Rotate with. Therefore, the dust adhering to the outer peripheral portion of the cylindrical filter 10 is separated from the cylindrical filter 10 by centrifugal force and blown off by blowing compressed air.
In the present embodiment, one injection unit 40 having a pillar portion 41 and a plurality of injection nozzles 42 is provided, but a plurality of injection units 40 may be provided side by side in parallel. In this case, even when the compressed air is blown to the same height position of the cylindrical filter 10, if the direction of the injection nozzle 42 is shifted to the left or right, the compressed air is blown to different positions, and the dust can be separated more efficiently. ..

The exhaust unit 50 is provided at a position facing the injection unit 40 with the cylindrical filter 10 supported by the turntable 30 sandwiched in the radial direction thereof. That is, an exhaust port 51 is provided at the lower end of the right side wall portion 25 of the casing 20, and the exhaust pipe 52 is connected to the exhaust port 51. The tip surface of the exhaust pipe 52 is substantially flush with the wall surface around the exhaust port 51, and a pipe 61 extending from the suction device 60 is connected to the base end portion of the exhaust pipe 52.
The suction device 60 can suck air and store dust inside, and for example, a vacuum cleaner is preferably used. By operating the suction device 60, the dust that is separated from the cylindrical filter 10 by centrifugal force and blown off is sucked from the exhaust port 51 together with the air, and is stored in the suction device 60 through the exhaust pipe 52 and the pipe 61. .. The stored dust is discarded at regular intervals.
In the present embodiment, one exhaust port 51 is provided, but a plurality of exhaust ports 51 may be provided. In this case, in order to increase the exhaust force, it is preferable to connect the suction device 60 to each exhaust port 51 via the exhaust pipe 52 and the pipe 61, respectively.

When using the filter cleaning device of the present embodiment, first, the cylindrical filter 10 on which dust is attached and accumulated is inserted into the inside of the casing 20 from the insertion port 21a by removing the lid 22 of the casing 20. Then, the flange portion 10b at the lower end of the cylindrical filter 10 is fixed to the rotating plate 32 of the turntable 30 so that the rotating shaft (shaft portion 32a) of the rotating plate 32 and the axis of the cylindrical filter 10 coincide with each other. To do.

After that, after closing the insertion port 21a with the lid 22, a compressed air supply device (not shown) connected to the air supply pipe 43 and a suction device 60 connected to the exhaust pipe 52 are activated.
Then, the compressed air injected from the plurality of injection nozzles 42 is blown to the outer peripheral portion of the filter body 10a of the cylindrical filter 10 while spreading in a substantially conical shape, whereby the cylindrical filter 10 is axially rotated by the turntable 30. It rotates together with the rotating plate 32. Therefore, the dust adhering to the outer peripheral portion of the cylindrical filter 10 is separated from the cylindrical filter 10 by centrifugal force and blown toward the exhaust portion 50 side by blowing compressed air.
The dust blown off from the cylindrical filter 10 is sucked from the exhaust port 51 together with the air, and is stored in the suction device 60 through the exhaust pipe 52 and the pipe 61. The stored dust is discarded at regular intervals.

As described above, according to the present embodiment, the cylindrical filter 10 is rotated by the compressed air injected from the injection nozzle 42 of the injection unit 40 and blown to the outer peripheral portion of the cylindrical filter 10, and the cylindrical filter 10 is formed. The adhering dust is separated from the cylindrical filter 10 by centrifugal force and blown toward the exhaust section 50 side by blowing compressed air, and the compressed air and dust are exhausted from the exhaust section 50 to the outside, so that the shape is cylindrical. The filter 10 can be cleaned easily and efficiently, and a drive source such as a motor is not required, which simplifies the configuration of the device itself.
Further, since the dust is separated from the cylindrical filter 10 in the closed space inside the casing 20, there is no problem of health damage.
Further, the dust is guided to the exhaust unit 50 by the pressure of the compressed gas from the injection unit 40, but since the suction device 60 is connected to the exhaust unit 50, the dust can also be guided to the exhaust unit 50 by the suction force. , Can be discharged effectively.

Further, by incorporating the filter cleaning device of the present embodiment into a dust collector installed in a factory or the like, dust collection by the dust collector can be efficiently performed, so that troubles related to dust collection at the manufacturing site can be reduced. It can contribute to the improvement of manufacturing efficiency. When incorporating the filter cleaning device into the dust collector, the casing of the dust collector may be used as the casing 20.

(Second Embodiment)
FIG. 2 is a side sectional view showing the filter cleaning device according to the second embodiment. The main difference between the filter cleaning device according to the present embodiment and the filter cleaning device according to the first embodiment is that an upper inclined wall 27, a lower inclined wall 28 and a dust box 29 are provided inside the casing 20, and exhaust gas. Since it is the position of the part 50, these will be described below, and the same reference numerals may be given to the same configurations as those in the first embodiment and the description thereof may be omitted.

In the present embodiment, the casing 20 has a larger length (width dimension) in the left-right direction than the casing 20 of the first embodiment.
Further, the exhaust portion 50 is arranged at the center of the axial height of the cylindrical filter 10. That is, an exhaust port 51 is provided at the center of the right side wall portion 25 of the casing 20 in the height direction, and the exhaust pipe 52 is connected to the exhaust port 51.

Further, an upward inclined wall 27 is provided inside the casing 20 above the exhaust portion 50. The upper inclined wall 27 is arranged so that the cross-sectional area of the closed space 20a becomes smaller from the injection portion 40 toward the exhaust portion 50. That is, the upper end of the upper inclined wall 27 is fixed to the inner surface of the upper wall 21 of the casing 20 by welding or the like on the right side wall 25 side of the turntable 30, and the lower end is fixed to the inner surface of the right wall 25 from the exhaust port 51. It is fixed at the upper position by welding or the like.

The lower inclined wall 28 is arranged inside the casing 20 so as to be inclined downward from the exhaust port 51 side below the exhaust port 51 of the exhaust portion 50, and the upper end portion of the lower inclined wall 28 is on the right side. The lower end is fixed to the wall 25 at a position below the exhaust port 51 by welding or the like, and the lower end is fixed to the bottom wall 23 on the right side wall 25 side of the turntable 30 by welding or the like.

A dust box 29 is embedded in the bottom wall portion 23. The dust box 29 is formed in a rectangular box shape whose thickness is substantially equal to the thickness of the bottom wall portion 23, and its upper surface opening is substantially flush with the upper surface of the bottom wall portion 23. Further, the dust box 29 is located below the lower end of the lower inclined wall 28, and the edge portion of the upper surface opening of the dust box 29 (the edge portion on the right side wall portion 25 side) substantially coincides with the lower end portion of the lower inclined wall 28. There is. Further, the dust box 29 is removable from the bottom wall portion 23.

According to the second embodiment, in addition to the same effect as that of the first embodiment, the following effects are obtained.
Since the cross-sectional area of the closed space 20a is reduced from the injection portion 40 toward the exhaust portion 50 by the upper inclined wall 27, the compressed air is throttled and the pressure is increased, so that dust can be easily discharged from the exhaust portion 50. Become.
Further, if the dust collides with the upper inclined wall 27, the dust will fall downward. This can be easily exhausted by catching it with the exhaust unit 50.
Further, since the lower inclined wall 28 is provided below the exhaust unit 50 and is inclined downward from the exhaust unit 50 side, the dust box 28 catches the dust that is not discharged from the exhaust unit 50 and falls further downward. Can lead to 29.
The exhaust unit 50 can mainly catch small (light) dust, and the dust box 29 can mainly catch large (heavy) dust, so that dust treatment can be performed appropriately.

(Modification example)
FIG. 3 shows a modified example of the first and second embodiments, and is a plan sectional view showing an arrangement state of the cylindrical filter 10.
In the first and second embodiments, one turntable 30 that rotatably supports the cylindrical filter 10 is provided, but in the modified example, a plurality of turntables 30 (for example, two) are provided. Therefore, in the modified example, a plurality of (two) cylindrical filters 10 can be cleaned.

The two turntables 30 and 30 are arranged in parallel and have an injection unit 40 for each turntable 30. That is, in the modified example, it has two injection portions 40. When there are three or more turntables 30, the number of injection units 40 is three or more according to the number of turntables 30.
Further, the injection portions 40, 40 adjacent to each other in the parallel direction inject compressed gas toward the outer peripheral portions of the cylindrical filters 10 and 10 so as to rotate the cylindrical filters 10 and 10 adjacent to each other in the parallel direction in opposite directions. It is configured to inject.

For example, as shown in FIG. 3A, the injection directions of the compressed gas injected from the injection nozzles 42, 42 of the injection units 40, 40 adjacent to each other in the parallel direction are set to the cylindrical filters 10 adjacent to each other in the parallel direction. It may be oriented in a substantially C shape so as to be separated from each other toward 10 or in a substantially inverted C shape so as to be closer to each other as shown in FIG. 3 (b).
As shown in FIG. 3A, when the injection direction of the compressed gas is directed to a substantially C shape, the compressed gas injected from the injection nozzles 42, 42 of the injection portions 40, 40 has a cylindrical shape adjacent to each other in the parallel direction. Of the outer peripheral portions of the filters 10 and 10, the outer peripheral portions on the opposite side to the inner outer peripheral portions facing each other may be sprayed.
Further, as shown in FIG. 3B, when the injection direction of the compressed gas is directed in a substantially inverted C shape, the compressed gas injected from the injection nozzles 42 and 42 of the injection units 40 and 40 is adjacent in the parallel direction. Of the outer peripheral portions of the matching cylindrical filters 10 and 10, the outer peripheral portions on the inner side facing each other may be sprayed.

According to such a modification, since two or more rotary tables 30 are arranged in parallel, the compressed gas in which two or more cylindrical filters 10 are efficiently injected from the injection unit 40. Can be cleaned by.
Further, the injection nozzles 42, 42 of the injection portions 40, 40 adjacent to each other in the parallel direction rotate the cylindrical filters 10, 10 adjacent to each other in the parallel direction in opposite directions, so that the outer peripheral portions of the cylindrical filters 10, 10 are rotated. Since the compressed gas is configured to be injected toward the cylinder, the compressed air flows in the same direction between the cylindrical filters 10 and 10 adjacent to each other in the parallel direction without flowing in opposite directions. The rotation of the cylindrical filters 10 and 10 is not braked. Therefore, the dust adhering to the cylindrical filters 10 and 10 can be easily blown off and cleaned.

(Example)
Next, an embodiment will be described.
First, the case of manual processing was used as a comparative example.
That is, the cylindrical filter was shaken up and down in the scale back, and the air gun was applied to the filter to remove dust.
In this comparative example, dust may be scattered and the health condition of the worker may be impaired.
In addition, there are cases where the cleaning condition is uneven depending on the worker and the dust collector is used without completely removing the dust, and as a result, the processing capacity of the dust collector may not be maximized.
Furthermore, it took an average of 26.7 hours to clean 16 cylindrical filters (for one batch).

On the other hand, as the first embodiment, the cylindrical filter was cleaned by using the filter cleaning device shown in FIG. 1 and a filter cleaning device having two turntables as shown in the modified example. That is, in the filter cleaning device, the exhaust unit is installed at the lower part of the casing, and a suction device for sucking dust is connected to the exhaust unit to collect the dust.
Further, as the second embodiment, the cylindrical filter was cleaned by using the filter cleaning device shown in FIG. 2 and the filter cleaning device having two turntables as shown in the modified example. That is, in the filter cleaning device, the exhaust portion is installed in the central portion in the height direction of the casing, and a suction device for sucking dust is connected to the exhaust portion to collect the dust. In addition, the filter cleaning device has an upward inclined wall, a downward inclined wall, and a dust box.

As a result, in both of Examples 1 and 2, there was no unevenness in the cleaning condition by the operator, and dust of all the cylindrical filters could be removed.
Further, in both Examples 1 and 2, it takes about 16.7 hours on average to clean all 16 (1 batch) cylindrical filters, and the working time is 26.7 hours in Comparative Example. It was possible to reduce it significantly compared to.
Further, in Example 2, large dust flows to the dust box, and small dust mainly flows from the exhaust unit to the aspirator and is collected. Therefore, the root clogging of the aspirator is less likely to occur as compared with the first embodiment.

10 Cylindrical filter 20 Casing 20a Sealed space 27 Upper sloping wall 28 Lower sloping wall 29 Dust box 30 Turntable (support)
40 Injection section 50 Exhaust section

Claims (3)

A filter cleaning device that cleans cylindrical filters.
A casing that forms a closed space inside,
A support portion provided inside the casing and rotatably supporting the cylindrical filter around the axis,
An injection unit provided inside the casing and injecting compressed gas toward the outer peripheral portion of the cylindrical filter supported by the support portion.
A cylindrical filter supported by the support portion is sandwiched in the radial direction thereof, and an exhaust portion provided at a position facing the injection portion is provided.
The filter is characterized in that the compressed air injected from the injection unit and blown to the outer peripheral portion of the cylindrical filter rotates the cylindrical filter and blows off dust adhering to the cylindrical filter. Cleaning device. The exhaust portion is arranged at the center of the axial height of the cylindrical filter arranged with the shaft facing up and down.
An upper inclined wall arranged inside the casing above the exhaust portion so that the cross-sectional area of the closed space becomes smaller from the injection portion toward the exhaust portion.
A downwardly sloping wall arranged inside the casing so as to incline downward from the exhaust part and downward from the exhaust part.
A dust box provided below the lower end of the downward sloping wall and
The filter cleaning device according to claim 1, wherein the filter cleaning device has. A plurality of the supports are arranged in parallel,
It has the injection part for each of the support parts,
The injection portions adjacent to each other in the parallel direction are configured to inject compressed gas toward the outer peripheral portion of the cylindrical filters so as to rotate the cylindrical filters adjacent to each other in the parallel direction in opposite directions. The filter cleaning device according to claim 1 or 2.

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