JP2020168589A - Filter cloth cleaning device for bug filter - Google Patents

Abstract

To inexpensively manufacture a filter cloth cleaning device and enhance the effect of cleaning on filter cloth with compressed air.SOLUTION: A filter cloth cleaning device has a fixing member 1 of which one end 1a is fixed to an air hose 2, a rotary member 4 rotatably attached to the fixing member 1, and a cover member 8 fixed to the fixing member 1 and covering the rotary member 4. A plurality of jet ports 6 provided in the rotary member 4 have a plurality of first jet ports 6A formed in a first virtual plane P orthogonal to an axis O of the rotary member 4 and radially extending from the axis O of the rotary member 4 at equal intervals from each other, and a plurality of second jet ports 6B formed in a second virtual plane Q orthogonal to the axis O of the rotary member 4 and displaced in an axis O direction with respect to the first virtual plane P and extending so as to be parallel to the plurality of first jet ports 6A from a position Oa offset from the axis O of the rotary member 4 by deviating to one direction side in a circumferential direction with respect to the plurality of first jet ports 6A radially extending from the axis O of the rotary member 4.SELECTED DRAWING: Figure 2

Description

The present invention relates to a filter cloth cleaning device for cleaning a filter cloth used in a bag filter which is a filtration type dust collector.

Patent Document 1 below can be mentioned as a conventional technique that most closely resembles the present invention as a filter cloth cleaning device conventionally used for a bag filter which is a filtration type dust collector. In order to effectively clean the filter cloth by blowing compressed air on the filter cloth, the dust adhering to the outer peripheral surface of the filter cloth is removed by blowing the pulsed compressed air on the inner peripheral surface of the filter cloth. As shown in Patent Document 2 below, a pulsed compressed air jet type dust collector designed to be cleaned is conventionally known.
In the prior art described in Patent Document 1, the rotating member is rotated by utilizing the reaction force of the compressed air supplied from the compressed air supply source, and the compressed air ejected from the rotating member is directed along the inner peripheral surface of the filter cloth. The compressed air sprayed on the inner peripheral surface of the filter cloth was sprayed uniformly over the entire inner peripheral surface of the filter cloth while moving in the circumferential direction. However, the moving speed of the compressed air sprayed on the inner peripheral surface of the filter cloth adhered to the filter cloth. It must be adjusted to obtain the optimum cleaning efficiency by dust or the like. Therefore, in the prior art described in Patent Document 1, the compressed air introduced into the rotating member is ejected from the first ejection port radially provided through the shaft core of the rotating member, thereby causing the compressed air to be the first. 1 The rotation of the rotating member is controlled by the reaction force due to the frictional resistance applied to the ejection hole, that is, the first ejection hole for controlling the rotation of the rotating member, which is responsible for the braking action, and the compressed air introduced into the rotating member are the axial centers of the rotating member. Rotating member rotation driving force that gives rotational driving force to the rotation of the rotating member by the reaction force due to the frictional resistance applied to the second ejection hole by ejecting radially from the second ejection port provided at a position deviated from the By providing two ejection holes and controlling the first and second ejection holes with each other, the moving speed of the compressed air sprayed on the inner peripheral surface of the compressed air filter cloth in the circumferential direction is adjusted to the dust adhesion state of the filter cloth. It was adjusted accordingly (the embodiment shown in FIG. 4 of Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-259557 Special Fair 8-6236 Gazette

Also in the present invention, Patent Document 1 describes that the rotating member is provided with the first ejection hole for rotating member rotation control as described above and the second ejection hole for rotating member rotation driving separately. Same as the invention. However, in the invention described in Patent Document 1, the method of forming the second ejection hole for rotating the rotating member is particularly complicated, the manufacturing cost is high, and it is not practical, and the compressed air is ejected from the second ejection hole. At that time, the compressed air collides with the hole wall of the second ejection hole and receives a large resistance in the pipe, which reduces the ejection pressure of the compressed air and lowers the cleaning efficiency, which is a fatal problem.

INDUSTRIAL APPLICABILITY According to the present invention, the first ejection port 6A and the second ejection port 6B, particularly the second ejection hole for rotating member rotation drive, are manufactured at low cost to be practical, and are introduced into the second ejection hole for rotating member rotation drive. Since the compressed air does not collide with the hole wall of the second ejection hole, it does not receive a large resistance in the pipe, and the compressed air G smoothly rotates the rotating member as a reaction force due to the smooth frictional resistance against the second ejection hole. The compressed air that is driven and ejected from the second ejection hole is efficiently blown onto the inner peripheral surface of the filter cloth, and the cleaning efficiency of the filter cloth is combined with the cleaning action of the first ejection hole for controlling the rotation of the rotating member. The purpose is to propose a filter cloth cleaning device for bag filters that can be raised.

If the means for achieving the above object is shown with reference numerals in the drawings, the bag filter filter cloth cleaning device according to the invention of claim 1 has one end 1a detachably connected to the air hose 2 and one end. A tubular fixing member 1 having a through hole 3 penetrating from the portion 1a to the other end portion 1b,
A communication space 5 rotatably mounted on the fixing member 1 and communicating with the through hole 3 of the fixing member 1, and a plurality of spouts 6 extending from the communication space 5 through the wall surface 4a toward the outer peripheral surface side. It has a bottomed tubular rotating member 4 having a bottom, and a plurality of window portions 7 fixed to the fixing member 1 to cover the outer peripheral surface of the rotating member 4 and open so as to face the plurality of spouts 6. A tubular cover member 8 is provided, and the plurality of spouts 6 are formed on a first virtual plane P orthogonal to the axis O of the rotating member 4, and from the axis O of the rotating member 4 to each other. A plurality of first spouts 6A extending radially at equal intervals and a second virtual plane Q that shifts in the axis O direction with respect to the first virtual plane P and is orthogonal to the shaft core O of the rotating member 4. From a position Oa formed and deflected in one direction in the circumferential direction with respect to the plurality of first ejection ports 6A radially extending from the axis O of the rotating member 4 and deviating from the axis O of the rotating member 4. The pulsed compressed air G supplied from the air hose 2 has a plurality of second spouts 6B extending so as to be parallel to the plurality of first spouts 6A, and the through hole 3 and the communication thereof. By ejecting from the plurality of first spouts 6A and the plurality of second spouts 6B through the space 5, the rotating member 4 is rotated at a required rotational speed, and the plurality of first spouts are rotated. The pulsed compressed air G ejected from the 6A and the plurality of second ejection ports 6B is sent to the inner peripheral surface Sa of the filter cloth S facing the window portion 7 of the tubular cover member 8. By spraying, the dust C adhering to the outer peripheral surface Sb of the filter cloth S is wiped off and washed.

The second aspect is the pulsed compression ejected from a plurality of first ejection ports 6A extending radially from the axial core O of the rotating member 4 at equal intervals in the filter cloth cleaning device for the bag filter according to the first aspect. When the air G loads each first ejection port 6A as a reaction force due to frictional resistance, it acts as a braking force against the rotation of the rotating member 4, and the plurality of firsts extending radially from the shaft core O of the rotating member 4. Pulse-shaped compressed air G ejected from each of the plurality of second outlets 6B extending in parallel with each of the plurality of first outlets 6A at a position Oa deviated to one direction side in the circumferential direction with respect to one ejection port 6A. Is configured to act as a rotational driving force with respect to the rotation of the rotating member 4 by loading each second ejection port 6B as a reaction force due to frictional resistance.

A third aspect of the present invention is the bag filter filter cloth cleaning device according to the first or second aspect, wherein each of the plurality of first spouts 6A and the plurality of second spouts 6A provided in parallel with the first spouts 6A in the circumferential direction. It is configured such that each deviation amount U in the circumferential direction between each first spout 6A and each second spout 6B is formed so as to gradually increase in the circumferential direction between the spout 6B. It is a thing.

4. The bag filter filter cloth cleaning device according to any one of claims 1 to 3, is detachably attached to the plurality of first spouts 6A and the plurality of second spouts 6B, and is described above. It is configured to include a single or a plurality of adjusting members 9 for adjusting the ejection amount of the pulsed compressed air G ejected from the plurality of first ejection ports 6A and the plurality of second ejection ports 6B.

Hereinafter, the effect of the present invention will be described with reference to the drawings. According to the filter cloth cleaning device for the bag filter according to the invention of claim 1, one end 1a is detachably connected to the air hose 2. , A tubular fixing member 1 having a through hole 3 penetrating from one end 1a to the other end 1b, and a communication rotatably attached to the fixing member 1 and communicating with the through hole 3 of the fixing member 1. A bottomed tubular rotating member 4 having a space 5 and a plurality of spouts 6 extending from the communication space 5 through the wall surface 4a to the outer peripheral surface side, and the rotating member fixed to the fixing member 1. A tubular cover member 8 having a plurality of window portions 7 that cover the outer peripheral surface of the four and open so as to face the plurality of spouts 6, is provided, and the plurality of spouts 6 are provided with the rotating member 4. A plurality of first spouts 6A formed on a first virtual plane P orthogonal to the axis O of the rotating member 4 and extending radially from the axis O of the rotating member 4 at equal intervals, and the first virtual plane P. The plurality of first spouts 6A are formed on a second virtual plane Q that shifts in the direction of the shaft core O and is orthogonal to the shaft core O of the rotating member 4, and extends radially from the shaft core O of the rotating member 4. With respect to the plurality of second spouts 6B extending in parallel with the plurality of first spouts 6A from the position Oa deviated from the axis O of the rotating member 4 in one direction in the circumferential direction. , And the pulsed compressed air G supplied from the air hose 2 penetrates the wall surface 4a of the rotating member 4 through the through hole 3 and the communication space 5 and extends toward the outer peripheral surface side. By ejecting from the first spout 6A and the plurality of second spouts 6B, the rotating member 4 is rotated at a required rotational speed while controlling the rotation of the rotating member 4, and the plurality of first spouts are rotated. The pulsed compressed air G ejected from the one ejection port 6A and the plurality of second ejection ports 6B is passed through the window portion 7 of the tubular cover member 8 to the inner circumference of the filter cloth S facing the window portion 7. By spraying on the surface Sa, the pulsed compressed air G penetrates from the inner peripheral surface Sa of the filter cloth S to the outer peripheral surface Sb side, and the dust C adhering to the outer peripheral surface Sb of the filter cloth S is pulsed compressed. The pulsed compressed air G that can be strongly blown off by the air G and is ejected from the plurality of first ejection ports 6A and the plurality of second ejection ports 6B formed on the rotating member 4 is generated by the rotating member 4. Since it is ejected while rotating, it is sprayed evenly over the entire circumference of the inner peripheral surface Sa of the filter cloth S. For example, after long-term use, dust is sprayed on the outer peripheral surface Sb of the filter cloth S. Even when C is firmly adhered and the filter cloth S is clogged, it can be reliably wiped off and washed.

In particular, in the present invention, the pulsed compressed air G introduced into the communication space 5 of the rotating member 4 is provided with the first ejection port 6A linearly in the radial direction passing through the rotating shaft core O, and the rotating shaft core is provided. Since the second spout 6B is also provided linearly in the direction parallel to the first spout 6A from the position Oa deviated from O and deviated from the shaft core O, both the first spout 6A and the second spout 6B are provided. It is very easy to manufacture because it is simply formed by making a hole in the rotating member 4 in a straight line, and it can be manufactured at low cost and is also practical.

Moreover, when the pulsed compressed air G is ejected from the first ejection port 6A and the second ejection port 6B, the second ejection port 6B is particularly formed in a linear shape as described above, and the compressed air is the same. Since it does not collide with the hole wall of the second ejection hole, it can be sprayed on the filter cloth S without reducing the ejection pressure of the compressed air, so that the cleaning effect can be efficiently improved.

According to the filter cloth cleaning device of the bag filter according to the invention of claim 2, the pulsed compressed air G ejected from a plurality of first spouts 6A extending radially from the shaft core O of the rotating member 4 at equal intervals to each other. Is loaded on each first ejection port 6A as a reaction force due to frictional resistance, so that the compressed air G acts as a braking force (braking force) with respect to the rotation of the rotating member 4 and radiates from the axis O of the rotating member 4. At a position Oa deviated in one direction in the circumferential direction with respect to the plurality of first spouts 6A extending in the direction of the above, ejected from each of the plurality of second spouts 6B extending in parallel with the plurality of first spouts 6A. Since the pulsed compressed air G loads each second ejection port 6B as a reaction force due to frictional resistance, the compressed air G acts as a rotational driving force with respect to the rotation of the rotating member 4. By the combined force action of the action acting as a braking force (brake force) with respect to the rotation of the rotating member 4 and the action acting as a rotational driving force with respect to the rotation of the rotating member 4, the rotating member 4 is reliably rotated and controlled. The pulsed compressed air G can be satisfactorily sprayed over the entire surface of the filter cloth S while being displaced in the circumferential direction, and a uniform cleaning effect on the entire surface of the filter cloth S can be effectively achieved.

According to the invention of claim 3, each of the first spouts is between the plurality of first spouts 6A and the plurality of second spouts 6B provided parallel to the first spouts 6A in the circumferential direction. Since each deviation amount U in the circumferential direction between 6A and each second spout 6B is formed so as to gradually increase in the circumferential direction, each first spout 6A and each second spout 6B The amount of deviation U in the circumferential direction is gradually increased in the circumferential direction. The amount of the pulsed compressed air G ejected from the second ejection port 6B at the position where the amount of deviation U is increased is the amount of the rotating member 4. The rotational driving force is large, whereas the deviation amount U in the circumferential direction between each first ejection port 6A and each second ejection port 6B gradually increases in the circumferential direction. The rotational driving force of the rotating member 4 is small at the ejection amount of the pulsed compressed air G ejected from the second ejection port 6B located at the position where the amount U is the smallest, and the compressed air G is ejected in one direction in the circumferential direction of the rotating member 4. As the amount of the pulsed compressed air G ejected gradually increases toward the other side in the circumferential direction, the rotational driving force of the rotating member 4 increases, which is a kind of pulsed compressed air. The rotating member 4 can be smoothly rotated by the action of the rotating blades of the above.

According to the invention of claim 4, the amount of the pulsed compressed air G ejected by mounting the single or a plurality of adjusting members 9 on the plurality of first spouts 6A and closing the single or a plurality of first spouts 6A. As D decreases, the action acting as a braking force (brake force) with respect to the rotation of the rotating member 4 becomes weaker, and the rotational speed of the rotating member 4 can be increased in combination with the action of the second ejection port 6B.

On the other hand, by mounting the single or a plurality of adjusting members 9 on the plurality of second spouts 6B and closing the single or a plurality of second spouts 6B, the amount of the pulsed compressed air G ejected is reduced. The action acting as the rotational driving force against the rotation of the rotating member 4 becomes weak, and the rotational speed of the rotating member 4 can be slowed down in combination with the action of the first ejection port 6A.

Furthermore, according to the present invention, the mounting position of the single or a plurality of adjusting members 9 may be the positions of the first spouts 6A and the second spouts 6B of the rotating member 4 facing each other, or the positions of the spouts 6A and 6B facing each other. The rotation speed of the rotating member 4 can also be controlled by setting the positions adjacent to each other.

In particular, according to the present invention, it is detachably attached to the plurality of first spouts 6A and the plurality of second spouts 6B, and ejects from the plurality of first spouts 6A and the plurality of second spouts 6B. Since it is provided with a single or a plurality of adjusting members 9 for adjusting the ejection amount of the pulsed compressed air G, as described above, the circumferential direction between the first ejection port 6A and the second ejection port 6B is provided. Each of the deviation amounts U gradually increases in the circumferential direction. By attaching the adjusting member 9 to the second ejection port 6B at the position where the deviation amount U has increased most and closing the second ejection port 6B, the rotating member 4 The amount of pulsed compressed air G ejected from the filter cloth S is reduced, the rotation speed of the rotating member 4 is reduced, and the pulsed compressed air G is intermittently and intensively blown onto the inner peripheral surface Sa of the filter cloth S. This makes it possible to effectively remove and clean the dust C having a large deposited layer adhering to the outer peripheral surface Sb of the filter cloth S.

On the other hand, each deviation amount U in the circumferential direction between each first ejection port 6A and each second ejection port 6B gradually increases in the circumferential direction, and the second ejection port 6B at the position where the deviation amount U is the smallest. By attaching the adjusting member 9 to the second ejection port 6B to close the second ejection port 6B, the rotational speed of the rotating member 4 does not decrease so much, so that the degree of concentration on the inner peripheral surface Sa of the filter cloth S is reduced. Pulsed compressed air can be blown while being sequentially displaced in the circumferential direction, and dust C having a relatively small amount of deposited layer adhering to the outer peripheral surface Sb of the filter cloth S can be effectively and quickly separated and cleaned. ..

As described above, according to the present invention, the dust C adhering to the outer peripheral surface Sb of the filter cloth S is changed by changing the mounting position and the number of mounting members 9 for the first spout 6A and the second spout 6B. Optimal cleaning conditions can be achieved according to the sedimentary layer.

It is a perspective view which illustrates the filter cloth cleaning apparatus of the bag filter which concerns on one Embodiment of this invention. It is a vertical sectional view of the filter cloth cleaning apparatus. It is a cross-sectional view cut off on the first virtual plane where the first spout of the filter cloth cleaning device is located. It is a cross-sectional view cut off on the second virtual plane where the second spout of the filter cloth cleaning device is located. It is a cross-sectional view cut off on the first virtual plane in a state where the adjusting member is attached to the first spout of the first virtual plane of the filter cloth cleaning device. It is a cross-sectional view cut off on the second virtual plane in a state where the adjusting member is attached to the second spout of the second virtual plane of the filter cloth cleaning device. It is a vertical cross-sectional view which shows the use state which inserted the filter cloth cleaning device into the cylindrical inside through the opening of the filter cloth, and ejected the pulsed compressed air. It is explanatory drawing which shows the state which connected the filter cloth cleaning apparatus to a compressed air supply source.

Hereinafter, an embodiment of the filter cloth cleaning device according to the present invention will be specifically described with reference to the drawings. As shown in FIGS. 1 and 2, in particular, from one end 1a (upper end in the drawing). The tubular fixing member 1 having a through hole 3 penetrating toward the other end 1b has an air hose connecting cylinder portion having a male screw portion 15 formed on the outer peripheral surface on the one end portion 1a side (upper end portion side in the drawing). 10 is provided, and the air hose connecting cylinder portion 10 and the air hose 2 are connected by a well-known air hose joint fitting 11. The air hose joint fitting 11 is composed of a joint cylinder 12, a joint nut 13 rotatably connected to the joint cylinder 12, and a tightening nut 14, and the tip of the air hose 2 is attached to the joint cylinder 12. The tip of the air hose 2 is connected to the joint cylinder 12 by fitting the portion and tightening the tightening nut 14 from above, and in this state, the joint nut 13 is screwed into the male screw portion 15 of the air hose connecting cylinder 10. As a result, the air hose 2 is connected to the fixing member 1.

On the other end 1b side (lower end side in the drawing) of the fixing member 1, a bottomed tubular rotating member 4 is rotatably provided on the thick portion 16 via a bearing 17. The bearing 17 is attached by a snap ring 18 on the rotating member 4 side and a snap ring 19 on the fixing member 1 side. The rotating member 4 has a communication space 5 connected to the through hole 3 of the fixing member 1, and a plurality of communication spaces 5 communicating with the rotating member 4 and penetrating the thick wall surface 4a of the rotating member 4 and extending toward the outer peripheral surface side. A spout 6 is provided.

The fixing member 1 covers the outer peripheral surface of the rotating member 4 and is widely opened in the circumferential direction so as to face the plurality of spouts 6, and in the embodiment shown in FIG. 3, three window portions 7 are formed in the circumferential direction. A tubular cover member 8 having (7a to 7c) is provided. As shown in FIG. 2, the cover member 8 has a fixing flange piece 20 provided at one end (upper end) of the cover member 8 and a step portion 21 formed on a thick portion 16 of the fixing member 1 and the fixing member. It is fixed to the fixing member 1 by being sandwiched between the fixing nut 22 screwed into the male threaded portion 15 on the outer peripheral surface of the air hose connecting cylinder portion 10 of 1. The cover member 8 is provided to prevent the rotating member 4 from coming into contact with the retainer 27 (FIG. 7) for retaining the filter cloth S and hindering the rotation of the rotating member 4, as will be described later.

As shown in FIGS. 1 to 3, the plurality of spouts 6 extending to the outer peripheral surface side through the thick wall surface 4a of the rotating member 4 are composed of a first spout 6A and a second spout 6B. Of these, as shown in FIGS. 2 and 3, the first ejection port 6A is formed on a first virtual plane P orthogonal to the axis O of the rotating member 4, and the axis O is used as a base point. It extends radially from O on virtual radius lines V (V1 to V6) at equal intervals, and in the embodiment shown in FIG. 3, it is composed of six first spouts 6A1 to 6A6.

In this way, in the communication space 5 of the rotating member 4, the pulsed compressed air G flowing in along the shaft core O is orthogonal to the shaft core O and extends radially from the shaft core O at equal intervals. The first spout 6A (6A1 to 6A6) is less susceptible to the in-pipe resistance of each first spout 6A, and the pulsed compressed air G ejected from the plurality of first spouts 6A (6A1 to 6A6). The ejection amount D acts as a reaction force due to frictional resistance, and the compressed air G acts as a braking force (braking force) with respect to the rotation of the rotating member 4 by loading each first ejection port 6A (6A1 to 6A6). become.

Further, as shown in FIGS. 2 and 4, the second ejection port 6B shifts in the axis O direction (lower direction in the figure) with respect to the first virtual plane P, and the axis O of the rotating member 4 A unidirectional side in the circumferential direction (that is, the rotating member 4) with respect to the virtual radius lines V (V1 to V6) formed on the second virtual plane Q orthogonal to the virtual plane Q and extending in the radial direction from the axis O of the rotating member 4. A virtual deviation line parallel to the radius line from positions Oa (Oa1 to Oa6) deviated from the axial core O of the rotating member 4 and deviated toward the clockwise side or the counterclockwise side in the drawing (clockwise side in the drawing). The shaft of the rotating member 4 is biased on Y (Y1 to Y6), that is, unidirectionally in the circumferential direction with respect to the plurality of first ejection ports 6A extending radially from the axis O of the rotating member 4. It extends on the virtual deviation line Y so as to be parallel to the plurality of first spouts 6A from the position Oa deviated from the core O, and in the embodiment shown in FIG. 4, it is composed of six second spouts 6B1 to 6B6. is there.

In this way, in the communication space 5 of the rotating member 4, the pulsed compressed air G flowing along the shaft core O of the rotating member 4 extends with respect to the plurality of first ejection ports 6A radiating from the shaft core O of the rotating member 4. At positions Oa deviated to one direction in the circumferential direction (positions Oa1 to Oa6 deviated clockwise from the axis O in the figure), parallel to each of the plurality of first spouts 6A (6A1 to 6A6). The pulsed compressed air G ejected from each of the plurality of extending second outlets 6B (6B1 to 6B6) acts as a reaction force due to frictional resistance, and the compressed air G loads each second outlet 6B, whereby the first For one spout 6A, the in-pipe resistance that the pulsed compressed air G receives at each first spout 6A is larger than the in-pipe resistance that the second spout 6B receives, and for this reason, the second spout 6B is A rotational driving force (in the figure, a rotational driving force in the counterclockwise direction Z in the figure) that rotates in the circumferential direction and tries to approach the same virtual radius line V as the first ejection port 6A having less resistance in the pipe acts. Then, this rotational driving force increases as the amount of deviation U of the plurality of second ejection ports 6B deviated in one direction in the circumferential direction with respect to the plurality of first ejection ports 6A increases.

Further, each deviation amount in the circumferential direction between the six first spouts 6A1 to 6A6 of the embodiment shown in FIG. 3 and the corresponding six second spouts 6B1 to 6B6 of the embodiment shown in FIG. U is formed so as to gradually increase in the circumferential direction. More specifically, the deviation amounts U1 to U6 between 6A1 to 6A6 and 6B1 to 6B6 are centered on the deviation amounts U1 to U3 between 6A1 and 6B1 to 6A3 and 6B3, and the axis O. It is divided into two groups of deviation amounts U4 to U6 between 6A4 and 6B4 to 6A6 and 6B6 provided at point-symmetrical positions, and the two groups have deviation amounts U1 to U3 and U4 to U6 in the circumferential direction, respectively. It is formed so as to gradually increase in the circumferential direction. In the embodiment, the deviation amounts of the first group are U1 = 2 mm, U2 = 3 mm, and U3 = 4 mm, and the deviation amounts of the second group are U4 = 2 mm, U5 = 3 mm, and U6 = 4 mm.

In this way, the second spout 6B is divided into two groups at the point-symmetrical positions of the rotating member 4, and the deviation amounts U1 to U3 and U4 to U6 in the circumferential direction are formed so as to gradually increase in the circumferential direction. As a result, the rotating member 4 can be efficiently and smoothly rotationally driven by the rotational driving action of the pair of rotating blades.

Further, it is detachably attached to the plurality of first spouts 6A and the plurality of second spouts 6B, and pulsed compression ejected from the plurality of first spouts 6A and the plurality of second spouts 6B. It is provided with one or a plurality of adjusting members 9 for adjusting the amount of air G ejected.

FIG. 3 is formed on a first virtual plane P orthogonal to the axis O of the rotating member 4, and is equidistant from each other on a virtual radius line V extending in the radial direction from the axis O with the axis O as a base point. In the embodiment shown in FIG. 5, the rod-shaped adjusting member 9 is screwed into one or more of the six first spouts 6A1 to 6A6. By mounting the plurality of adjusting members 9 on the plurality of first ejection ports 6A and blocking the single or plurality of first ejection ports 6A, the amount of the pulsed compressed air G ejected is reduced, and the rotating member 4 can be rotated. On the other hand, the action acting as a braking force (braking force) is weakened, and the rotational speed of the rotating member 4 can be increased in combination with the action of the second ejection port 6B. In the embodiment, the adjusting member 9 is screwed into the first ejection port 6A4 to close the ejection port 6A4.

As described above, FIG. 4 is on a second virtual plane Q that shifts in the axis O direction (lower direction in the figure) with respect to the first virtual plane P and is orthogonal to the shaft core O of the rotating member 4. One direction side in the circumferential direction (that is, the clockwise side or the counterclockwise side of the rotating member 4) with respect to the virtual radius lines V (V1 to V6) formed and extending in the radial direction from the axis O of the rotating member 4. The virtual radius line V from the position Oa deviated from the axis O of the rotating member 4 (in the figure, the positions Oa1 to Oa6 deviated clockwise from the axis O). Virtual deviation line Y (Y1 to Y6) parallel to
), That is, it deviates from the axial core O of the rotating member 4 in one direction in the circumferential direction with respect to the plurality of first ejection ports 6A extending radially from the axial core O of the rotating member 4. The virtual deviation line Y (Y1 to Y6) is parallel to each of the plurality of first ejection ports 6A (6A1 to 6A6) from the position Oa (positions Oa1 to Oa6 displaced clockwise from the axis O in the drawing). ), And in the embodiment shown in FIG. 6, the rod-shaped adjusting member 9 is screwed into any one or more of the six second spouts 6B1 to 6B6. By mounting the plurality of adjusting members 9 on the plurality of second spouts 6B and blocking the single or the plurality of second spouts 6B, the amount of the pulsed compressed air G ejected is reduced, and the rotating member 4 can be rotated. On the other hand, the action acting as the rotational driving force is weakened, and the rotational speed of the rotating member 4 can be slowed down in combination with the action of the first ejection port 6A. In the embodiment, of the six second spouts 6B1 to 6B6, the adjusting member 9 is screwed into the second spouts 6B2 and 6B5 to block the spouts 6B2 and 6B5.

As described above, the most increased deviation amount U (U3, U6) in which each deviation amount U in the circumferential direction between each first ejection port 6A and each second ejection port 6B gradually increases in the circumferential direction. By attaching the adjusting member 9 to the second ejection port 6B (6B3, 6B6) at the position and closing the second ejection port 6B, the amount of pulsed compressed air G ejected from the rotating member 4 is reduced, and the rotation The rotation speed of the member 4 is reduced, and the pulsed compressed air G can be intensively blown onto the inner peripheral surface Sa of the filter cloth S, whereby the deposited layer adhering to the outer peripheral surface Sb of the filter cloth S is large. Dust C can be effectively removed.

On the other hand, at the position of the smallest displacement amount U (U1, U4) in which each deviation amount U in the circumferential direction between each first ejection port 6A and each second ejection port 6B gradually increases in the circumferential direction. By attaching the adjusting member 9 to the second ejection port 6B (6B1, 6B4) and closing the second ejection port 6B, the amount of the pulsed compressed air G ejected from the rotating member 4 does not decrease so much. Since the rotational speed of the rotating member 4 does not decrease so much, the filter cloth S is blown with pulsed compressed air while being sequentially displaced in the circumferential direction by reducing the degree of concentration on the inner peripheral surface Sa of the filter cloth S. The dust C having a relatively small amount of the deposited layer adhering to the outer peripheral surface Sb of the above can be effectively and quickly separated.

Furthermore, the mounting position of the single or a plurality of adjusting members 9 shall be the positions of the first spouts 6A and the second spouts 6B of the rotating member 4 facing each other, or the positions adjacent to each other. Also, the rotation speed of the rotating member 4 can be controlled.

In this way, by changing the mounting position and the number of mounting members 9 for the first spout 6A and the second spout 6B, the dust C is aligned with the deposited layer of dust C adhering to the outer peripheral surface Sb of the filter cloth S. Optimal cleaning conditions can be achieved.

FIG. 7 shows a usage state showing a state in which the filter cloth cleaning device according to the present invention is incorporated in a bag filter 23 which is a dust collector. A partition plate 24 is attached to the upper surface of the bag filter 23, and the partition plate 24 is provided with a large number of filter cloth mounting holes 25 in the vertical and horizontal directions, and the filter cloth mounting holes 25 are provided with a cylindrical elongated bottomed bag. The upper end Sc of the shaped filter cloth S is opened and airtightly attached by the mounting bracket 26, and a retainer 27 having a skeleton structure for maintaining the cylindrical shape of the filter cloth S is inserted and arranged from above, and the exhaust gas is exhausted. A Venturi 28 for passage is attached. Then, the incinerated exhaust gas in the bag filter 23 passes from the outer peripheral surface Sb of the filter cloth S to the inner peripheral surface Sa side, and only the clean exhaust gas passes through the filter cloth S and flows into the inside of the filter cloth S. The clean incinerated exhaust gas is discharged to the outside by increasing the discharge rate. At this time, the dust C contained in the incinerated exhaust gas is filtered on the outer peripheral surface Sb of the filter cloth S as shown in the figure. It will adhere to the outer peripheral surface Sb of the cloth S.

Therefore, in order to remove the dust C and clean it by the filter cloth cleaning device according to the present invention, as shown in FIG. 7, the fixing member 1, the rotating member 4, and the cover member airtightly connected to the air hose 2 are used. The present device incorporating the 8 is inserted into the cylindrical inner surface 29 of the filter cloth S, and as described above, pulsed compressed air G is supplied from a large number of ejection ports 6 of the rotating member 4 from the inner peripheral surface Sa of the filter cloth S. It is ejected so as to penetrate the outer peripheral surface Sb4a, whereby the dust C adhering to the outer peripheral surface Sb is peeled off and discharged to the outside from a discharge port (not shown) provided in the bag filter 23.

FIG. 8 is a circuit diagram for pumping pulsed compressed air G into the rotating member 4, and the pressure is reduced to a required pressure from the compressed supply source, the air compressor 30, by the supply hose 31 via the pressure reducing valve 32. The compressed air is sent to the air tank 33, where it is converted into pulsed compressed air G by the diaphragm type solenoid valve 35 controlled by the solenoid valve control unit 34 installed in the air tank 33, and the tip of the air hose 2 is pressed. As described above, the air hose fitting 11 is connected to the fixing member 1, and the pulsed compressed air G is pumped into the rotating member 4 rotatably provided on the fixing member 1, and the pulsed compressed air G is pumped. The rotating member 4 is rotated at a required speed by the air G, and the operator holds the air hose 2 and inserts the device such as the rotating member 4 into the cylindrical inner 29 of the filter cloth S, and the air hose 2 filters the device. By displaced in the vertical direction inside the cylindrical shape of the cloth S, the pulsed compressed air G can be blown over the entire circumferential direction and the entire vertical direction of the inner peripheral surface Sa of the cloth S of the filter cloth S. Dust C adhering to the entire outer peripheral surface Sb of the filter cloth S can be reliably peeled off and cleaned. The outer peripheral surface of the rotating member 4 is covered with a cover member 8, which is a skeleton structure attached to the inside of the cylindrical shape to keep the filter cloth S in a cylindrical shape when the rotating member 4 rotates. This is a necessary member for preventing the rotating member 4 from being hindered by hitting the retainer 27 of the above. Further, when the operator inserts the rotating member 4 into the cylindrical inner 29 of the filter cloth S, it is preferable that the rotating member 4 is inserted in a state of being manually rotated by the operator, whereby the rotating member 4 is inserted. The cylindrical inner 29 can be continuously and smoothly rotated.

Here, it should be noted that the rotating member 4 is rotated and the pulsed compressed air G is blown from the ejection port 6 onto the inner peripheral surface Sa of the filter cloth S only over the entire circumferential direction of the inner peripheral surface Sa. This is to spread the compressed air G uniformly. For this purpose, the pulsed compressed air G is displaced in the circumferential direction while being intensively sprayed to the extent that the dust C adhering to the outer peripheral surface Sb of the filter cloth S is peeled off, and is displaced in the vertical direction by the operator's operation. It is important to do. If the rotating member 4 rotates more than necessary, the pulsed compressed air G ejected from the rotating member 4 slides on the inner peripheral surface Sa of the filter cloth S so that the compressed air G spouts on the surface of the filter cloth S in the circumferential direction. There is a possibility that the compressed air G cannot be effectively blown only by passing through the filter cloth S, and the dust C adhering to the outer peripheral surface Sb of the filter cloth S cannot be peeled off.

1 Fixing member 1a One end of the fixing member 1b The other end of the fixing member 2 Air hose 3 Through hole 4 Rotating member 4a Wall surface of rotating member 5 Communication space 6 Spout 6A 1st spout 6B 2nd spout 7 Window 8 cover Member 9 Adjusting member P 1st virtual plane Q 2nd virtual plane O Axis core of rotating member Oa Position off axis S Filter cloth Sa Inner peripheral surface of filter cloth Sb Outer surface surface of filter cloth C Dust U Elimination amount

Claims (4)

A tubular fixing member having one end detachably connected to an air hose and having a through hole penetrating from the one end toward the other end.
A bottomed tubular shape having a communication space rotatably attached to the fixing member and communicating with a through hole of the fixing member, and a plurality of spouts extending from the communication space to the outer peripheral surface side through the wall surface. With rotating members
A tubular cover member which is fixed to the fixing member, covers the outer peripheral surface of the rotating member, and has a plurality of windows which are opened so as to face the plurality of spouts.
The plurality of spouts
A plurality of first spouts formed on a first virtual plane orthogonal to the axis of the rotating member and extending radially from the axis of the rotating member at equal intervals.
The plurality of first spouts that shift in the axial direction with respect to the first virtual plane, are formed on the second virtual plane orthogonal to the axial core of the rotating member, and extend radially from the axial core of the rotating member. It has a plurality of second spouts that are deflected in one direction in the circumferential direction and extend from a position deviated from the axis of the rotating member so as to be parallel to the plurality of first spouts.
The rotating member is required by ejecting pulsed compressed air supplied from the air hose from the plurality of first spouts and the plurality of second spouts through the through holes and the communication space. The pulsed compressed air ejected from the plurality of first spouts and the plurality of second spouts is confronted with the pulsed compressed air through the window portion of the tubular cover member while being rotated at the rotation speed of the above. A bag filter filter cloth cleaning device that wipes off dust adhering to the outer peripheral surface of the filter cloth by spraying it on the inner peripheral surface of the filter cloth. The amount of pulsed compressed air ejected from a plurality of first ejection ports extending radially from the axial core of the rotating member at equal intervals is applied to each first ejection port as a reaction force due to frictional resistance. The compressed air acts as a braking force against the rotation of the rotating member, and at a position deviated in one direction in the circumferential direction with respect to the plurality of first spouts extending radially from the axis of the rotating member, the plurality of The rotating member is loaded on each second spout by the amount of pulsed compressed air ejected from each of the plurality of second spouts extending parallel to each first spout as a reaction force due to frictional resistance. The filter cloth cleaning device according to claim 1, which acts as a rotational driving force with respect to the rotation of the air. Between each of the plurality of first spouts and the plurality of second spouts provided parallel to the first spouts in the circumferential direction, the circumference between the first spouts and the second spouts. The filter cloth cleaning device for a bag filter according to claim 1 or 2, wherein each deviation amount in the direction is formed so as to gradually increase in the circumferential direction. It is detachably attached to the plurality of first spouts and the plurality of second spouts, and adjusts the amount of pulsed compressed air ejected from the plurality of first spouts and the plurality of second spouts. The filter cloth cleaning device according to any one of claims 1 to 3, further comprising a single or a plurality of adjusting members.

Images