JP2009154140A - Nozzle for filter cleaning, and filter cleaning tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nozzle for filter cleaning, and a cleaning tool, capable of surely removing dust stuck to a cylindrical filter. <P>SOLUTION: The filter cleaning tool is provided with a body part 2 jetting compressed air supplied from an air supply pipe onto the inner peripheral face of the cylindrical filter in a state of being inserted into the cylindrical filter as a cleaning object, and is composed so as to be able to clean the cylindrical filter. The body part 2 is provided with: a main pipe 11 which is formed into a bottomed cylinder and in which a connection part 21 allowing connection of the air supply pipe is formed on the opening side and a plurality of air discharge ports are formed on the outer peripheral face; a plurality of jetting pipes 12a-12l jetting compressed air from the tips, with the tips protruded outwardly from the outer peripheral face of the main pipe and the base end parts attached to the respective discharge ports; and a pair of disk-shaped first and second weights 13, 14 disposed at the bottom side of the main pipe 11 and opening side of the main pipe. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a filter cleaning nozzle and a filter cleaning tool for cleaning a cylindrical filter.

Bag filters (cylindrical filters) formed in a cylindrical shape or a bottomed cylindrical shape are known as filters that are disposed inside various dust collectors and remove dust (dust) in the air (exhaust). . This type of bag filter is generally formed of a woven or non-woven fabric having air permeability, or paper having air permeability, and is clogged with dust and the like as it is used. An exchange is required. In this case, from the viewpoint of resource saving and cost reduction, it is preferable to remove the dust adhering to the bag filter, clean it, and reuse it. As such an apparatus capable of meeting demand, a cylindrical filter cloth cleaning apparatus disclosed in Japanese Patent Application Laid-Open No. 2007-229677 is known. This cleaning device includes a nozzle, a lifting mechanism, a cleaning air supply mechanism, and the like. In this case, the nozzle has a rigid upper plate and lower plate, two flexible members respectively disposed along the upper plate and the lower plate, and a circumferential groove-like shape between the two flexible members. A bolt, a nut and a spacer member for forming an air jet (gap) are provided, and the whole is configured in a disc shape. In this cleaning device, the elevating mechanism moves the nozzle in the axial direction of the bag filter while ejecting the cleaning air supplied by the cleaning air supply mechanism from the air outlet of the nozzle inserted into the bag filter. The dust adhering to the bag filter can be removed.
JP 2007-229677 (page 4-5, FIGS. 1 and 2)

  However, the cleaning device described above has the following problems. That is, in this cleaning device, dust adhering to the bag filter is released by jetting cleaning air at a high pressure from an air outlet of a nozzle inserted into the bag filter. However, in this cleaning device, since the nozzle is formed in a disk shape, for example, when dust is partially fixed, turbulence is generated by the cleaning air ejected from the nozzle, and the turbulence causes the nozzle to move. As a result of the inclination and the tendency to become unstable, it may be difficult to evenly spray cleaning air over the entire peripheral wall of the bag filter. Therefore, this cleaning device has a problem that dust may be left behind due to the nozzle being formed in a disk shape. Further, since the nozzle is formed in a disc shape, when the nozzle is moved in the vertical direction, when the outer peripheral portion comes into contact with the peripheral wall of the bag filter, the nozzle is largely inclined. There is a possibility that the cleaning air may be more difficult to spray on the peripheral wall. On the other hand, when a cleaning operation is performed using this type of cleaning device, the separated dust is scattered outside from the opening of the bag filter by the pressure of the cleaning air. In this case, dust containing a large amount of harmful substances such as dioxin is attached to the bag filter disposed in the dust collector for removing dust in the exhaust discharged from the combustion device, for example. When such dust is scattered outside, not only does the work environment worsen and it causes serious human damage to the worker, but the natural environment around the work place deteriorates and the neighborhood residents are affected. However, it will cause a serious situation that will cause enormous human damage. However, this type of conventional cleaning device does not include means for preventing dust scattering that would cause such a situation, and an improvement in this respect is desired.

  The present invention has been made in view of such a problem, and a filter cleaning nozzle that can reliably remove dust adhering to the cylindrical filter, and dust being adhered to the cylindrical filter are reliably removed and being cleaned. The main object of the present invention is to provide a filter cleaning tool that can reliably prevent dust from being scattered outside.

To achieve the above object, the filter cleaning nozzle according to the present invention inserts compressed air supplied by an air supply pipe into the peripheral wall of the cylindrical filter in a state where the nozzle is inserted into the cylindrical filter as a cleaning object. A filter cleaning nozzle that includes a main body portion that is ejected toward the body and is configured to be able to clean the cylindrical filter, and is configured to be detachable from the main body portion, and in the mounted state, the main body portion The main body is formed in a bottomed cylindrical shape, and a connection portion to which the air supply pipe can be connected is formed on the opening side, and a plurality of discharge ports are formed on the peripheral wall. And the base end portion of each main pipe is attached to each discharge port so that the front end portion protrudes outward from the peripheral wall of the main pipe, and the compressed air is ejected from the front end portion. A plurality of jet pipe, is configured to include at least a bottom portion disposed a disc-shaped in side weight of the main tube, said cover has a plurality of vent holes for exposing said each of said tips of the jet pipe, respectively Is formed on the peripheral wall, and can be attached to the main body in a state in which each tip end is in contact with or close to the edge of each vent in the mounted state .

  The filter cleaning nozzle according to the present invention is the above-described filter cleaning nozzle, wherein the main body portion includes a pair of weights, and each weight includes the bottom side of the main pipe and the opening side of the main pipe. Respectively.

  Moreover, the nozzle for filter cleaning which concerns on this invention is comprised in said filter cleaning nozzle, The said ejection pipe is comprised so that attachment or detachment with respect to the said discharge outlet is possible.

  Further, the filter cleaning nozzle according to the present invention is configured such that, in the above-described filter cleaning nozzle, the ejection pipe is positioned such that the tip end portion is located inside the outer peripheral edge of the weight.

Further, the filter cleaning nozzle according to the present invention is the above-described filter cleaning nozzle, wherein the ejection pipe has the tip portions at equal intervals in a plan view viewed from the bottom side or the opening side of the main pipe. Attached to be distributed .

  Moreover, the filter cleaning nozzle according to the present invention is the above-described filter cleaning nozzle, wherein the cover includes a jetting air amount adjusting shutter that opens and closes a part of each of the vent holes.

  Further, the filter cleaning nozzle according to the present invention is the above-described filter cleaning nozzle, wherein the cover is formed in a bottomed cylindrical shape and is positioned with respect to the insertion hole and the main body portion through which the connection portion of the main pipe is inserted. A cover body having a fitting portion formed on the bottom side and a first thread formed on the opening side; and a first screw thread in the cover body formed in a bottomed cylindrical shape. A second screw threaded on the opening portion side, and a fixing member for fixing the cover main body to the main body portion in a screwed state of the two screw threads. The to-be-fitted part that can be fitted to the fitting part is formed.

  Moreover, the filter cleaning nozzle according to the present invention is the above-described filter cleaning nozzle, wherein the cover includes a flange portion, and the flange portion receives an exhaust airflow of the jetted compressed air. Fins or vent holes for rotating the filter cleaning nozzle with respect to the air supply pipe connected to the connection portion are formed.

Further, a filter cleaning tool according to the present invention is a filter cleaning tool including the above-described filter cleaning nozzle and a blocking member configured to be attachable to an opening of a cylindrical filter as a cleaning object , wherein the closing member, the air supply pipe connected filter cleaning nozzle with can be inserted through hole is formed, the compressed air from this the filter cleaning nozzle which is ejected into the tubular in the filter discharge port for discharging to the outside is formed with the dust in the cylindrical filter.

  According to the nozzle for cleaning a filter according to the present invention, a disc-like weight is provided on at least the bottom side of the bottomed cylindrical main pipe in which the ejection pipe is provided, and the main body portion is configured. Unlike the conventional nozzles configured as above, even if high pressure compressed air is ejected from the ejection pipe and the reaction force of the compressed air acts on the filter cleaning nozzle, the posture of the filter cleaning nozzle is due to the presence of the weight. Can be maintained in a stable state. For this reason, according to this filter cleaning nozzle, as a result of being able to blow compressed air uniformly on the peripheral wall of the cylindrical filter, dust and the like adhering to the peripheral wall (inner surface and outer surface) of the cylindrical filter are reliably removed. be able to.

In addition, according to the filter cleaning nozzle according to the present invention, the peripheral wall of the cover is formed in a cylindrical shape by being configured to be detachable with respect to the main body and including the cylindrical cover that covers the main body in the mounted state. Even if it touches the peripheral wall of the filter, it will move slightly in the horizontal direction (direction perpendicular to the central axis of the filter cleaning nozzle) to ensure that it will tilt greatly like a conventional nozzle with a disk shape. Can be prevented. In addition, since the main body is covered with the cylindrical cover, it is possible to reliably prevent the dust and the like peeled off from the cylindrical filter from adhering to the main body, thereby preventing a decrease in dust removal efficiency. be able to. In addition, since the cover is configured to be detachable from the main body, dust or the like adhering to the peripheral walls of a plurality of types of cylindrical filters having different inner diameters can be obtained by replacing the cover according to the inner diameter of the cylindrical filter. It can be removed reliably. Moreover, since one main-body part can be shared, cost reduction can be aimed at.

  Further, according to the filter cleaning nozzle according to the present invention, the weight of the filter cleaning nozzle is made more stable due to the presence of both weights by disposing the weights on both the bottom side and the opening side of the main pipe. As a result of being able to maintain, the dust etc. which adhered to the surrounding wall (inner surface and outer surface) of a cylindrical filter can be removed more reliably.

  Further, according to the filter cleaning nozzle according to the present invention, since the ejection pipe is configured to be detachable from the outlet of the main pipe, for example, a plurality of types of ejection pipes having different lengths are prepared, By replacing the ejection pipe to match the inner diameter of the cylindrical filter, it is possible to support multiple types of cylindrical filters with different inner diameters. Compared to using different filter cleaning nozzles for different cylindrical filters with different inner diameters. Thus, the overall cost can be sufficiently reduced.

  Further, according to the filter cleaning nozzle according to the present invention, the distal end portion of the ejection pipe is positioned inside the outer peripheral edge portion of each weight, so that the distal end portion of the ejection pipe is the peripheral wall of the cylindrical filter. It is possible to reliably prevent the tubular filter from being damaged by contact with the nozzle, and to reliably prevent the movement of the nozzle for cleaning the filter due to the tip of the ejection pipe contacting the peripheral wall of the tubular filter. Can be prevented.

Further, according to the filter cleaning nozzle according to the present invention, the compression pipe is attached to the main pipe so that the tip part is dispersed at equal intervals in a plan view viewed from the bottom side or the opening side of the main pipe. Since air can be evenly blown onto the peripheral wall of the cylindrical filter, dust or the like attached to the peripheral wall (inner surface and outer surface) of the cylindrical filter can be further reliably removed .

Further, according to the nozzle filter cleaning according to the present invention, by constructing the cover comprises a jet air control shutter for opening and closing a portion of each vent, each vent by the injected air amount adjusting shutter By opening and closing a part of the mouth, it is possible to easily adjust the pressure and amount of compressed air ejected toward the peripheral wall of the cylindrical filter to an appropriate state according to the amount of dust adhering to the cylindrical filter. . For this reason, efficient cleaning can be performed.

  Furthermore, according to the filter cleaning nozzle of the present invention, the bottomed cylindrical cover body and the second screw threadingly engaged with the first screw thread of the cover body are formed, and both the threads are screwed together. By forming the cover with a bottomed cylindrical fixing member that fixes the cover main body to the main body portion, the cover can be easily fixed to the main body portion. The work efficiency when cleaning the filter can be improved. In addition, by forming a fitting part for positioning in the cover body and forming the fitted part in the body part, the fitting part and the fitted part are fitted to each other, so that the vent of the cover The tip of the ejection pipe can be reliably brought into close contact with or in contact with the edge of the nozzle.

  In addition, according to the filter cleaning nozzle according to the present invention, the cover is configured by including the flange portion in which the fin or the air hole is formed, so that the filter cleaning nozzle and the air supply can be supplied using the rotary joint or the swivel joint. Since the filter cleaning nozzle can be rotated by the exhaust airflow by connecting the tube to the tube in a rotatable manner, the compressed air can be sprayed more uniformly onto the peripheral wall of the cylindrical filter. Further, according to the filter cleaning nozzle, unlike the configuration in which the filter cleaning nozzle is rotated by a jet output of compressed air, for example, the filter cleaning nozzle can be rotated by using the exhaust airflow. There is no use of the kinetic energy of compressed air (that is, energy loss), and the kinetic energy of compressed air can be used for removing dust and the like. Furthermore, by simply replacing the cover without adding any processing to the main body itself, it is possible to function as a rotating nozzle while having a simple configuration with a small number of components. For this reason, the manufacturing cost of the filter cleaning nozzle can be sufficiently reduced.

  Moreover, according to the filter cleaning tool which concerns on this invention, by providing the obstruction | occlusion member which can be attached to the opening part of a cylindrical filter, scattering to the circumference | surroundings of the dust removed from the cylindrical filter can be prevented. Therefore, it is possible to reliably prevent the work environment and the natural environment from deteriorating. Moreover, since the entrance of rainwater into the cylindrical filter can be reliably prevented by closing the opening of the cylindrical filter with the closing member, the cylindrical filter of the dust collector in which the cylindrical filter is stored Even when the storage room is installed outdoors, it is possible to perform a cleaning operation in rainy weather, which has been impossible until now.

  The best mode of a filter cleaning nozzle and a filter cleaning tool according to the present invention will be described below with reference to the accompanying drawings.

  First, the configuration of the filter cleaning tool 101 will be described. A filter cleaning tool 101 shown in FIG. 1 is an example of a filter cleaning tool according to the present invention, and is suitably configured for cleaning the bag filter 301 (see FIG. 10). Here, the bag filter 301 is an example of a cylindrical filter as an object to be cleaned in the present invention. For example, the bag filter 301 is formed into a bottomed cylindrical shape using a woven fabric or a nonwoven fabric having air permeability, and various types of collections. It is arranged in the bag filter storage chamber of the dust device so that dust and the like in the exhaust can be removed.

  On the other hand, the filter cleaning tool 101 includes a nozzle 1 and a cap 71 as shown in FIG. The nozzle 1 is an example of a filter cleaning nozzle according to the present invention. The nozzle 1 includes a main body 2 and a cover 3 and is inserted into the bag filter 301 in an air supply pipe 201 (see FIG. 10) described later. ) Can be ejected to the peripheral wall 304 (see the figure) of the bag filter 301. As shown in FIGS. 2, 3, and 5, the main body 2 includes a main pipe 11, jet pipes 12 a to 12 l (hereinafter, simply referred to as “jet pipe 12” when not distinguished), a first weight 13, and a second weight 14. It is configured with.

  As shown in FIGS. 2, 3, and 5, the main pipe 11 has a bottomed cylindrical shape as a whole. Further, a connection portion 21 that can be connected to the connection fitting 202 (see FIG. 10) of the air supply pipe 201 is formed on the opening 11 a side of the main pipe 11. In this case, a thread 21 a (male spiral) that can be screwed to a thread (female spiral) (not shown) formed on the inner surface of the connection fitting 202 is formed on the outer surface of the connection portion 21. Further, as shown in FIG. 5, a plurality (for example, 12) of discharge ports 22 a to 22 l (hereinafter, simply referred to as “discharge ports 22” when not distinguished) are formed on the peripheral wall 11 c of the main pipe 11. . Further, as shown in the figure, a thread (female spiral) is formed on the inner surface of each discharge port 22.

  In this case, as shown in FIG. 5, the discharge ports 22 a to 22 d are formed at equal intervals along the virtual circle C <b> 1 on the peripheral wall 11 c centering on the point O <b> 1 on the central axis X of the main pipe 11. The discharge ports 22e to 22h are formed at equal intervals along a virtual circle C2 on the peripheral wall 11c centered on the point O2 on the central axis X of the main tube 11, and the discharge ports 22i to 22l are formed on the main tube 11. Are formed at equal intervals along a virtual circle C3 on the peripheral wall 11c with the point O3 on the central axis X as the center. Further, the discharge ports 22a to 22l are straight lines connecting the point O1 and the discharge ports 22a to 22d, straight lines connecting the point O2 and the discharge ports 22e to 22h, and the point O3 and the discharge ports 22i. The straight lines connecting ˜221 are formed so as to be 30 ° from each other without being overlapped in the plan view as viewed from the opening 11a side or the bottom 11b side of the main pipe 11, that is, to be dispersed on the peripheral wall 11c. The position is specified. Further, the inner surface of the peripheral wall 11c of the main pipe 11 is mirror-finished.

  As shown in FIGS. 2, 3, and 5, the ejection pipe 12 is formed in a cylindrical shape. Further, as shown in FIG. 5 (see the ejection pipe 12h in FIG. 5), the base end portion 31 of the ejection pipe 12 can be screwed into a thread (female spiral) formed on the inner surface of each discharge port 22. A screw thread (male spiral) is formed, and a flat portion 33 facing each other is formed in the central portion of the ejection pipe 12. In the other drawings except FIG. 5, the plane portion 33 is not shown. Further, as shown in FIG. 3, the ejection pipe 12 has a distal end portion 32 projecting outward from the peripheral wall 11 c of the main pipe 11, and a thread formed on the base end portion 31 and the discharge port 22. The base end portion 31 is attached to the main pipe 11 by screwing a thread formed on the inner surface, and the compressed air supplied to the main pipe 11 is ejected from the tip end portion 32. Furthermore, as shown in the figure, a tapered surface is formed inside the base end portion 31 of the ejection pipe 12. Further, the inner surface of the ejection pipe 12 including the tapered surface is mirror-finished. In this case, the discharge ports 22 of the main pipe 11 to which the ejection pipe 12 is attached are formed so as to be dispersed on the peripheral wall 11c as described above. Therefore, in this nozzle 1, as shown in FIG. 4, each tip of each ejection pipe 12 attached to each discharge port 22 in a plan view state viewed from the bottom 11 b (or opening 11 a) side of the main pipe 11. The parts 32 are configured to be distributed at equal intervals.

  In this case, when attaching the ejection pipe 12 to the main pipe 11, the ejection pipe 12 is rotated with the above-described flat portion 33 sandwiched by a spanner or the like, and the thread of the base end 31 and the thread of each discharge port 22 are connected. By screwing, attachment can be performed easily. Further, the jet pipe 12 can be easily detached from the main pipe 11 by rotating the jet pipe 12 in the reverse direction using a spanner or the like. Therefore, according to this nozzle 1, by preparing a plurality of types of ejection pipes 12 having different lengths and replacing the ejection pipe 12 in accordance with the inner diameter of the bag filter 301, a plurality of types of bag filters having different inner diameters. 301, it is possible to sufficiently reduce the overall cost compared to using different nozzles 1 for each bag filter 301 having different inner diameters.

  The first weight 13 corresponds to one of a pair of weights in the present invention. As shown in FIGS. 2, 3, and 5, the first weight 13 is formed in a disc shape as a whole and is formed in an insertion hole 13 b ( In the state where the main pipe 11 is inserted into the main pipe 11 (see FIG. 5), the main pipe 11 is attached to the opening 11a side by welding or the like. Further, the first weight 13 has a positioning projection 13a (an object to be covered in the present invention) that can be fitted into a positioning hole 51 (an example of a fitting portion in the present invention) formed in a cover body 41 of the cover 3 to be described later. An example of a fitting part is formed. Further, the edge portion of the first weight 13 is chamfered to prevent the peripheral wall 304 from being damaged when the first weight 13 comes into contact with the peripheral wall 304 of the bag filter 301 during cleaning. In this case, the first weight 13 is defined such that the radius thereof is longer than the distance from the central axis X of the main pipe 11 to the distal end portion 32 of the ejection pipe 12. That is, the main body 2 is configured such that the distal end portion 32 of the ejection pipe 12 is located inside the outer peripheral edge portion of the first weight 13. The second weight 14 is the other of the pair of weights in the present invention, and is substantially the same as the first weight 13 except that the positioning protrusion 13a is not formed as shown in FIGS. It is formed into a shape. In this case, the insertion hole 14b is attached to the bottom 11b side of the main pipe 11 by welding or the like in a state where the main pipe 11 is inserted into the insertion hole 14b (see FIG. 5) formed in the center.

  In order to further stabilize the posture of the main body 2 (nozzle 1) during cleaning, the overall height of the main body 2, specifically, the bottom of the second weight 14 (the lower surface in FIG. 2) The main body 2 is preferably configured such that the length of the 1 weight 13 to the top surface (the upper surface in the figure) is equal to or greater than the diameters of the first weight 13 and the second weight 14. That is, it is preferable that the main body 2 is configured to be vertically long as a whole.

  The cover 3 is an example of a cover according to the present invention, and is configured to be detachable from the main body 2 as shown in FIG. 7, and can cover the main body 2 in the mounted state ( (See FIG. 8). Specifically, the cover 3 includes a cover body 41 and a fixing member 42 as shown in FIGS. The cover body 41 is configured as a bottomed cylinder as a whole. Further, the cover main body 41 is configured such that its inner diameter is slightly larger than the maximum diameter of the main body 2 (the diameters of the first weight 13 and the second weight 14), and the main body 2 can be inserted. . Further, as shown in FIG. 6, an insertion hole 52 through which the connection portion 21 of the main pipe 11 can be inserted is formed in the bottom 41 b of the cover main body 41 (the upper portion in the figure), and the second portion of the main body 2 is formed. A positioning hole 51 into which the protrusion 13a formed on one weight 13 can be inserted is formed. A plurality of (for example, 12) vent holes 53 are formed on the peripheral wall 41c of the cover main body 41 so that the distal end portion 32 of the ejection pipe 12 faces. In this case, as shown in FIG. 8, the formation position of the vent 53 is defined so that the tip 32 of the ejection pipe 12 is in contact with or close to the edge of the vent 53 when attached to the main body 2. Has been. Furthermore, on the outer surface of the peripheral wall 41c of the cover main body 41 on the opening 41a side, as shown in FIG. 6, a screw 54 (first screw in the present invention) is formed. Further, the edge of the cover body 41 is chamfered to prevent the peripheral wall 304 from being damaged when the cover body 41 contacts the peripheral wall 304 of the bag filter 301 during cleaning.

  As shown in FIG. 6, the fixing member 42 has a bottomed cylindrical shape as a whole. Further, on the inner surface of the peripheral wall 42c of the fixing member 42 on the opening 42a side, a screw 61 (second screw in the present invention) that is screwed with the screw 54 of the cover body 41 is formed. Further, the edge of the fixing member 42 is chamfered to prevent the peripheral wall 304 from being damaged when the fixing member 42 contacts the peripheral wall 304 of the bag filter 301 during cleaning. In this case, the fixing member 42 is fitted to the cover main body 41 while screwing the screw 61 to the screw 54 of the cover main body 41 that covers the main body 2, whereby the cover main body 41 (cover 3) is attached to the main body. Fix to 2. In addition, each component (the main pipe 11, the ejection pipes 12a-12l, the 1st weight 13, and the 2nd weight 14) which comprises the main-body part 2, and each component (the cover main body 41 and the fixing member 42) which comprise the cover 3 As the material, it is preferable to use a metal such as stainless steel or aluminum that is excellent in heat resistance and corrosion resistance in consideration of work in a state where the inside of the bag filter 301 is at a high temperature.

  The cap 71 corresponds to a closing member in the present invention, and is a member for preventing scattering of dust removed from the bag filter 301 when the bag filter 301 is cleaned using the nozzle 1. As shown in FIGS. 9 and 10, the bottomed cylindrical main body 72, the flange 73 formed on the outer surface of the peripheral wall of the main body 72, and the bottom of the main body 72 from the position where the flange 73 is formed. It is configured to include a duct mounting portion 74 (a discharge port in the present invention) formed on the upper side in the drawing. An insertion hole 75 through which the air supply pipe 201 can be inserted is formed on the bottom surface of the main body 72. In this case, the cap 71 is defined so that the outer shape of the main body portion 72 is slightly smaller than the inner diameter of the bag filter 301, and the opening side of the main body portion 72 (the portion below the collar portion 73 in the figure) is a bag filter. It is configured to be insertable into the opening 302 of 301. As the material of the cap 71, various materials such as rubber, resin and metal can be used.

  Further, the filter cleaning tool 101 includes a fixing ring 81 shown in FIG. 10 as an accessory. The fixing ring 81 is a member for preventing a collision between the nozzle 1 inserted into the bag filter 301 and the bottom 303 (see FIG. 11) of the bag filter 301 during cleaning. It is configured to be detachable at an arbitrary position.

  Next, an example of a method for cleaning the bag filter 301 disposed in the bag filter storage chamber of the dust collector using the filter cleaning tool 101 will be described with reference to the drawings.

First, the nozzle 1 is assembled by attaching the cover 3 to the main body 2 prior to cleaning. Specifically, as shown in FIG. 7, the cover main body 41 of the cover 3 is covered on the main body 2 from the first weight 13 side. At this time, as shown in FIG. 8, causes through interpolation the connecting portion 21 of the main tube 11 of the main body 2 into the insertion hole 52 of the cover body 41, the positioning of the cover body 41 to the protrusion 13a of the first weight 13 hole 51 To fit. Next, the cover main body 41 is joined to the main body portion 2 by screwing the screw 61 formed on the inner surface of the peripheral wall 42c of the fixing member 42 with the screw 54 formed on the outer surface of the peripheral wall 41c of the cover main body 41. Fix it. At this time, as shown in the figure, the tip 32 of each ejection pipe 12 comes into contact (or close proximity) to the edge of the vent 53 of the cover body 41. Thus, the assembly of the nozzle 1 (attachment of the cover 3 to the main body 2) is completed.

  Subsequently, the air supply pipe 201 is inserted into the insertion hole 75 of the cap 71. Next, the air supply pipe 201 is connected to an air compressor not shown. Subsequently, the connection fitting 202 of the air supply pipe 201 is connected to the connection part 21 of the main body 2 in the nozzle 1, and the fixing ring 81 is attached to a predetermined position of the outer part of the cap 71 in the air supply pipe 201. In this case, the length from the bottom of the nozzle 1 (the bottom of the fixing member 42 in the cover 3) to the fixing ring 81 is such that the cap 71 is attached to the bag filter 301 from the bottom 303 (see FIG. 11) of the bag filter 301. The mounting position of the fixing ring 81 is defined so as to be shorter than the length to the bottom (the bottom of the main body 72). Next, as shown in FIG. 10, the main body 72 of the cap 71 (the portion below the flange 73 in the figure) is fitted and attached to the opening 302 of the bag filter 301, and the duct mounting portion of the cap 71. A dust collecting duct 76 is connected to 74, and a dust collecting bag (not shown) is attached to the tip of the duct 76. In this case, for example, by using a dust collector with a dust bag, it is possible to efficiently collect dust and the like in the exhaust gas described later. Further, when a collection place exists in the factory where the dust collecting device is installed, a duct 76 may be laid to the collection place to collect dust and the like.

Then, to start the supply of compressed air from the air compressor. At this time, the compressed air supplied from the air compressor is sent into the main pipe 11 from the opening 11 a side through the air supply pipe 201. Next, the compressed air sent into the main pipe 11 is sent to the jet pipe 12 connected to each discharge port 22 formed in the peripheral wall 11 c of the main pipe 11, and from the tip 32 of the jet pipe 12 to the cover 3. It is ejected toward the peripheral wall 304 of the bag filter 301 through the vent 53. In this case, in the nozzle 1, the inner surface of the main pipe 11 and the inner surface of the ejection pipe 12 are mirror-finished, and a tapered surface is formed at the base end portion 31 of the ejection pipe 12. Therefore, in this nozzle 1, the disturbance of the compressed air in the main pipe 11 and the ejection pipe 12 can be suppressed, and the compressed air is smoothly sent from the main pipe 11 to the ejection pipe 12, so that the pressure loss is kept low. Compressed air can be efficiently ejected. Subsequently, as shown in FIG. 11, the nozzle 1 is moved from the opening 302 side toward the bottom 303 side along the length direction of the bag filter 301 by extending the air supply pipe 201. In this case, since the fixing ring 81 is attached to the air supply pipe 201, the fixing ring 81 contacts the bottom of the cap 71 before the nozzle 1 and the bottom 303 of the bag filter 301 collide, and the nozzle 1 moves. Since it is regulated, the collision between the nozzle 1 and the bottom 303 of the bag filter 301 is reliably prevented.

  On the other hand, the compressed air ejected from the nozzle 1 is blown against the peripheral wall 304 of the bag filter 301, and dust or the like adhering to the inner surface side of the peripheral wall 304 is peeled off from the peripheral wall 304 by this pressure, and the inside of the bag filter 301. To dissipate. In this case, since the pressure in the bag filter 301 is increased by the compressed air ejected from the nozzle 1, the dust and the like diffused in the bag filter 301 together with the air (compressed air) in the bag filter 301. From the duct attaching portion 74 through the duct 76, the bag filter 301 is discharged to the outside, and is collected by a dust collecting bag (not shown) attached to the duct 76. Further, a part of the compressed air ejected from the nozzle 1 passes through the peripheral wall 304 of the bag filter 301, whereby dust or the like adhering to the outer surface side of the peripheral wall 304 is peeled off from the peripheral wall 304 and the bag filter 301. Dissipates into the gap between the filter storage chamber. In this case, since the gap between the bag filter 301 and the storage container is sealed with respect to the outside, the dust and the like diffused in the gap fall to the bottom of the bag filter storage chamber without being scattered around.

  Here, the nozzle 1 is configured by disposing a disc-shaped first weight 13 and a second weight 14 at both ends of a cylindrical main tube 11 in which the ejection tube 12 is disposed. For this reason, unlike the conventional nozzle configured in a disk shape, even if high-pressure compressed air is ejected from the ejection pipe 12 and the reaction force of the compressed air acts on the nozzle 1, The presence of the nozzle 1 is maintained in a stable state. Further, since the main body 2 is covered with a cylindrical cover 3, the nozzle 1 is configured in a cylindrical shape as a whole. For this reason, even if the outer peripheral part of the nozzle 1 (the peripheral wall 41c of the cover 3) contacts the peripheral wall 304 of the bag filter 301, it only moves slightly in the horizontal direction (direction perpendicular to the central axis of the nozzle 1). The situation of tilting greatly as in the case of a conventional nozzle configured in a disc shape is reliably prevented. For this reason, in this nozzle 1, as a result of being able to spray compressed air uniformly on the peripheral wall 304 of the bag filter 301, it is possible to reliably remove dust and the like adhering to the peripheral wall 304.

  Moreover, in this nozzle 1, since the main-body part 2 is covered with the cylindrical cover 3, the situation where the dust etc. which peeled from the surrounding wall 304 adhere to the main-body part 2 can be prevented reliably. . Further, the filter cleaning tool 101 includes a cap 71 that closes the opening 302 of the bag filter 301. For this reason, in this filter cleaning tool 101, as a result of preventing the dust removed from the bag filter 301 from being scattered to the surroundings, it is possible to reliably prevent the work environment and the natural environment from deteriorating. Further, by closing the opening 302 of the bag filter 301 with the cap 71, it is possible to reliably prevent rainwater from entering the bag filter 301. For this reason, even when the bag filter storage chamber of the dust collector is installed outdoors, it is possible to perform a cleaning operation in rainy weather, which has been impossible until now.

  Next, when the cleaning is finished, the compressor is stopped and the supply of compressed air is stopped. Next, the duct 76 is removed from the duct attaching portion 74 of the cap 71. Subsequently, the air supply pipe 201 is pulled upward in FIG. 11, and the nozzle 1 is moved to the opening 302 side (that is, the cap 71 side) of the bag filter 301. At this time, the nozzle 1 comes into contact with the periphery of the insertion hole 75 in the cap 71, and the air supply pipe 201 is further pulled up in this state, whereby the nozzle 1 is pulled out from the bag filter 301, and accordingly, the bag filter 301 The cap 71 is removed from the opening 302.

In the nozzle 1, the bag filter 301 can be cleaned using the state in which the cover 3 is not attached, that is, using only the main body 2. Even in this case, the presence of the first weight 13 and the second weight 14 keeps the posture of the nozzle 1 (main body 2) in a stable state, so that it is possible to reliably remove dust and the like. Further, as described above, the cover 3 is configured to be detachable from the main body 2. For this reason, a plurality of types of bag filters 301 having different inner diameters can be cleaned by preparing a plurality of covers 3 having different outer diameters and replacing the cover 3 in accordance with the inner diameter of the bag filter 301. Even in this case, the above-described effects can be realized. In this case, since one main-body part 2 can be shared, it becomes possible to reduce cost. In addition, by screwing the fixing member 42 to the cover body 41, the working efficiency in cleaning because the Ki de is possible to easily fix the cover 3 to the body portion 2, a plurality of types of bag filter 301 having different inside diameter It is also possible to improve.

  As described above, according to the nozzle 1, the main body 2 is configured by disposing the disc-shaped first weight 13 and the second weight 14 on the bottomed cylindrical main tube 11 in which the ejection tube 12 is disposed. As a result, unlike the conventional nozzle configured in a disk shape, even if high pressure compressed air is ejected from the ejection pipe 12 and the reaction force of the compressed air acts on the nozzle 1, the weights 13, 14. Therefore, the posture of the nozzle 1 is maintained in a stable state. For this reason, according to this nozzle 1, as a result of being able to spray compressed air uniformly with respect to the surrounding wall 304 of the bag filter 301, the dust adhering to the inner surface and outer surface of the surrounding wall 304 can be removed reliably.

  Further, according to this nozzle 1, since the first weight 13 and the second weight 14 are disposed on both the bottom 11b side and the opening 11a side of the main pipe 11, respectively, the presence of both weights 13 and 14 makes the nozzle 1 As a result, the dust attached to the inner and outer surfaces of the peripheral wall 304 in the bag filter 301 can be more reliably removed.

  Further, according to the nozzle 1, since the ejection pipe 12 is configured to be detachable from the ejection port 22, a plurality of types of ejection pipes 12 having different lengths are prepared and matched to the inner diameter of the bag filter 301. Thus, by replacing the ejection pipe 12, it is possible to cope with a plurality of types of bag filters 301 having different inner diameters, and therefore, the overall cost compared to using different nozzles 1 for the bag filters 301 having different inner diameters. Can be sufficiently reduced.

  In addition, according to the nozzle 1, the distal end portion 32 of the ejection pipe 12 is positioned inside the outer peripheral edge portions of the weights 13 and 14, so that the distal end portion 32 of the ejection pipe 12 is in the bag filter 301. It is possible to reliably prevent the bag filter 301 from being damaged by contacting the peripheral wall 304. Further, it is possible to reliably prevent a situation in which it is difficult for the nozzle 1 to move due to the distal end portion 32 of the ejection pipe 12 coming into contact with the peripheral wall 304 of the bag filter 301.

  Further, according to this nozzle 1, by attaching the ejection pipe 12 to the main pipe 11 so that the tip end portions 32 are dispersed at equal intervals in a plan view state seen from the bottom 11b side or the opening 11a side of the main pipe 11, Since the compressed air can be evenly blown against the peripheral wall 304 of the bag filter 301, dust or the like adhering to the inner surface and the outer surface of the peripheral wall 304 can be more reliably removed.

  Moreover, according to this nozzle 1, while being comprised so that attachment or detachment with respect to the main-body part 2 was equipped, the cylindrical cover 3 which covers the main-body part 2 in the mounting state was provided, the surrounding wall 41c of the cover 3 is a bag filter. Even if it touches the peripheral wall 304 of 301, it can be reliably tilted by a slight movement in the horizontal direction (direction perpendicular to the central axis of the nozzle 1) as in a conventional nozzle configured in a disk shape. Can be prevented. Further, since the main body 2 is covered with the cylindrical cover 3, it is possible to reliably prevent the dust and the like peeled off from the peripheral wall 304 from adhering to the main body 2. Further, since the cover 3 is configured to be detachable from the main body 2, a plurality of types of bag filters 301 having different inner diameters can be cleaned by replacing the cover 3 in accordance with the inner diameter of the bag filter 301. it can. Moreover, since one main-body part 2 can be shared, cost reduction can be aimed at.

  Further, according to the nozzle 1, the bottomed cylindrical cover main body 41 and the screw 61 that is screwed into the screw 54 of the cover main body 41 are formed. Since the cover 3 is configured by including the bottomed cylindrical fixing member 42 that fixes the body 41 to the body 2, the cover 3 (cover body 41) can be easily secured to the body 2. It is possible to improve work efficiency when cleaning a plurality of types of bag filters 301 having different types. Further, the positioning hole 51 is formed in the cover body 41, and the positioning projection 13a is formed on the first weight 13, so that the projection 13a is fitted into the positioning hole 51, so that the edge of the vent 53 of the cover 3 is obtained. The distal end portion 32 of the ejection pipe 12 can be reliably brought into close contact with or in contact with the portion.

  Moreover, according to this filter cleaning tool 101, since the cap 71 that can be attached to the opening 302 of the bag filter 301 is provided, it is possible to prevent the dust removed from the bag filter 301 from being scattered around. Thus, it is possible to reliably prevent a situation where the working environment and the natural environment are deteriorated. Moreover, since the entrance of rainwater into the bag filter 301 can be reliably prevented by closing the opening 302 of the bag filter 301 with the cap 71, the bag filter storage chamber of the dust collector is installed outdoors. Even in such a case, it is possible to perform cleaning work in rainy weather, which has been impossible until now.

  In addition, this invention is not limited to said structure. For example, instead of the cover 3 described above, a cover 403 shown in FIG. 12 may be employed. As shown in the figure, the cover 403 includes a cover main body 441 and a fixing member 442. The cover main body 441 includes a flange 451 at the bottom (upper part in the drawing), and a plurality of fins 452 are formed on the flange 451. Further, the fixing member 442 includes a flange portion 461 at the bottom (the lower portion in the figure), and the fin portion 461 is formed with a plurality of fins 462. In this case, the fins 452 and 462 receive the airflow generated in the bag filter 301 when the compressed air is ejected from the main body 2 (the airflow toward the opening 302 from the bottom 303) (for example, the direction in which the nozzle 1 rotates). , A rotational force is generated in the direction of arrow A shown in FIG. In the configuration including the cover 403, for example, instead of the above-described screw type (screw type) connection portion 21 and connection fitting 202 (see FIG. 10), a nozzle 1 (main body portion) is used by using a rotary joint or a swivel joint. By connecting 2) to the air supply pipe 201 in a rotatable manner, the nozzle 1 can be rotated by the airflow of the exhaust. For this reason, the compressed air can be sprayed more uniformly onto the peripheral wall 304 of the bag filter 301.

  Moreover, it can replace with the cover 3 and the cover 503 shown in FIG. As shown in the figure, the cover 503 includes a cover main body 541 and a fixing member 542. The cover main body 541 includes a flange portion 551 at the bottom (upper portion in the drawing), and a plurality of vent holes 552 are formed in the flange portion 551. The fixing member 542 includes a flange portion 561 at the bottom (the lower portion in the figure), and the flange portion 561 has a plurality of ventilation holes 562 formed therein. In this case, the air holes 552 and 562 receive the airflow generated in the bag filter 301 when the compressed air is ejected from the main body 2 (the airflow from the bottom 303 toward the opening 302) in the direction in which the nozzle 1 rotates ( For example, a rotational force is generated in the direction of arrow A shown in FIG. In the configuration provided with the cover 503, similarly to the configuration provided with the cover 403, the nozzle 1 and the air supply pipe 201 are connected by using a rotary joint or a swivel joint. Since the nozzle 1 can be rotated, the compressed air can be sprayed more uniformly on the peripheral wall 304 of the bag filter 301.

  Further, the example in which the opening 11a of the main pipe 11 is formed in a circular shape and the ejection pipe 12 is formed in a cylindrical shape has been described above. However, the shapes of the opening 11a and the ejection pipe 12 are not limited thereto, for example, as shown in FIG. As described above, the nozzle 601 in which the discharge port 622 of the main pipe 611 is formed in a rectangular shape and the ejection pipe 612 is formed in a cylindrical shape having a rectangular cross section can be employed. In this configuration, the same effect as the nozzle 1 described above can be obtained. Can be realized.

  The configuration example in which the projection 13a formed on the first weight 13 is fitted into the positioning hole 51 formed in the cover main body 41 of the cover 3 to position the cover main body 41 on the main body 2 has been described above. Is not limited to this. For example, a protrusion may be formed inside the cover body 41 and a positioning hole may be formed in the first weight 13. In this case, the shape of the protrusion and the positioning hole is not limited to a circular shape in plan view, and a rectangle or any other shape can be adopted. Furthermore, a nozzle 701 shown in FIG. 15 can be adopted as another configuration of the positioning means. The nozzle 701 includes a second weight 714 instead of the second weight 14 described above, and a cover 703 instead of the cover 3. In this case, a pair of protrusions 714a are formed on the outer peripheral surface of the second weight 714, and a pair of protrusions 714a that can be fitted to the protrusions 714a are formed on the inner surface of the cover 703 on the opening side (lower side in the figure). A groove 703a is formed. In this configuration, as shown in the figure, when the cover 703 is covered from the first weight 13 side to the main body 2, the grooves 703 a of the cover 703 and the protrusions 714 a of the second weight 714 are fitted. By aligning, the main body 2 and the cover 703 are positioned. Further, the connecting portion 21 of the main body 2 is inserted into the insertion hole 52 of the cover 703, and the cover 703 is fixed to the main body 2 by screwing the nut 704 into the connecting portion 21.

  Moreover, it can replace with the above-mentioned cover 3 and can also employ | adopt the cover 803 shown in FIG. In the following description, the same components as those of the cover 3 are denoted by the same reference numerals, and redundant description is omitted. The cover 803 includes a cover main body 841, a discharge air amount adjustment shutter 843 (hereinafter also simply referred to as “shutter 843”), and the fixing member 42 described above. As shown in the figure, the cover main body 841 has a flange 841d formed on the peripheral wall 841c, and is configured in the same manner as the cover main body 41 except for this point. The shutter 843 is formed in a cylindrical shape, and is configured to be rotatable with respect to the peripheral wall 841c in a state where the shutter 843 is fitted in a portion of the peripheral wall 841c that is lower than the flange portion 841d. In addition, a communication hole 843a is formed in the shutter 843 at a position facing the vent hole 53 formed in the peripheral wall 841c. In the configuration provided with the cover 803, as shown in FIG. 17, the shutter 53 is rotated with respect to the peripheral wall 841c so as to face the vent 53 of the cover main body 841, thereby opening the vent 53 to the outside. Can do. Further, as shown in FIG. 18, the vent hole 53 can be closed by rotating the shutter 843 with respect to the peripheral wall 841c so as to cover the vent hole 53. For this reason, in the structure provided with this cover 803, since the pressure and discharge amount of the compressed air ejected from the ejection pipe 12 of the main-body part 2 can be adjusted easily, cleaning efficiency can further be improved.

  Further, the configuration example in which the base end portion 31 of the ejection pipe 12 is attached to the main pipe 11 by screwing the thread formed on the base end portion 31 of the ejection pipe 12 and the thread formed on the inner surface of the discharge port 22 is described above. However, the attachment method of the ejection pipe 12 is not limited to this. For example, a configuration in which the base end portion 31 is attached to the main pipe 11 by welding in a state where the base end portion 31 is inserted into the discharge port 22 without forming a thread at the base end portion 31 and the discharge port 22 can be adopted. . Further, the strength of the attachment portion can be increased by screwing the base end portion 31 to the discharge port 22 and further welding the base end portion 31.

  In addition, a configuration in which a protrusion is provided on the flange portion 73 of the cap 71 can be employed. In this configuration, for example, by placing a foot on the protrusion and pressing the cap 71, it is possible to prevent the cap 71 from floating from the bag filter 301 due to the pressure of the compressed air ejected from the nozzle 1.

3 is a perspective view showing a configuration of a filter cleaning tool 101. FIG. 2 is a perspective view illustrating a configuration of a main body unit 2. FIG. 3 is a cross-sectional view of a main body 2. FIG. It is the top view which looked at the main pipe 11 which attached the ejection pipe 12 from the bottom part 11b side. 3 is an exploded perspective view of a main body 2. FIG. 3 is a perspective view showing a configuration of a cover 3. FIG. 5 is an explanatory diagram for explaining a method of attaching a cover 3 to the main body 2. FIG. 2 is a cross-sectional view of the nozzle 1. FIG. 3 is a cross-sectional view of a cap 71. FIG. It is the 1st explanatory view for explaining the method of cleaning bag filter 301 using filter cleaning tool 101. It is the 2nd explanatory view for explaining the method of cleaning bag filter 301 using filter cleaning tool 101. 4 is a perspective view showing a configuration of a cover 403. FIG. FIG. 6 is a perspective view illustrating a configuration of a cover 503. FIG. 6 is a perspective view illustrating a configuration of a nozzle 601. FIG. 6 is a perspective view illustrating a configuration of a nozzle 701. FIG. 6 is a perspective view showing a configuration of a cover 803. 6 is a first explanatory diagram for explaining a method of using a cover 803. FIG. FIG. 10 is a second explanatory diagram for explaining a method of using the cover 803.

DESCRIPTION OF SYMBOLS 1,601 Nozzle 2 Main body part 3,403,503,703,803 Cover 11,611 Main pipe 11a, 42a, 302 Opening part 11b Bottom part 11c, 41c, 42c, 304 Peripheral wall 12a-12l, 612 Jet pipe 13 1st weight 13a Protrusion 14,714 Second weight 21 Connection portion 22a to 22l, 622 Discharge port 31 Base end portion 32 Tip portion 41, 441, 541, 841 Cover body 42, 442, 542 Fixing member 51 Positioning hole 52 Insertion hole 53 Ventilation port 54 , 61 Thread 71 Cap 74 Duct mounting part 101 Filter cleaning tool 201 Air supply pipe 301 Bag filter 304 Peripheral wall 451, 461, 551, 561, Hour part 452, 462 Fin 552, 562 Vent hole

Claims (10)

A main body for ejecting compressed air supplied by an air supply pipe toward the peripheral wall of the cylindrical filter in a state of being inserted into the cylindrical filter serving as a cleaning target body, and cleaning the cylindrical filter A filter cleaning nozzle configured to be possible,
The main body portion is formed in a bottomed cylindrical shape, a connection portion to which the air supply pipe can be connected is formed on the opening side, and a plurality of discharge ports are formed on the peripheral wall, and a tip portion thereof A plurality of ejection pipes whose base end parts are attached to the respective discharge ports so as to project outward from the peripheral wall of the main pipe and eject the compressed air from the distal end parts; and at least a bottom part of the main pipe A filter cleaning nozzle comprising a disk-shaped weight disposed on the side. The main body includes a pair of weights,
2. The filter cleaning nozzle according to claim 1, wherein each of the weights is disposed on the bottom side of the main pipe and the opening side of the main pipe.   The filter cleaning nozzle according to claim 1, wherein the ejection pipe is configured to be detachable from the discharge port.   4. The filter cleaning nozzle according to claim 1, wherein the ejection pipe is configured such that the tip end portion is located inside an outer peripheral edge portion of the weight. 5.   The filter according to any one of claims 1 to 4, wherein the ejection pipe is attached so that the tip end portions are evenly spaced in a plan view state seen from the bottom side or the opening side of the main pipe. Cleaning nozzle. It is configured to be attachable to and detachable from the main body part, and includes a cylindrical cover that covers the main body part in a mounted state,
The cover is formed with a plurality of vent holes on the peripheral wall so that the tip portions of the ejection pipes face each other, and the tip portions are in contact with or close to the edge portions of the vent ports in the mounted state. 6. The filter cleaning nozzle according to claim 1, wherein the filter cleaning nozzle is configured to be attachable to the main body in a state where the filter cleaning is performed.   The filter cleaning nozzle according to claim 6, wherein the cover includes a jetting air amount adjusting shutter that opens and closes a part of each of the vent holes. The cover is formed in a bottomed cylindrical shape, and an insertion hole through which the connection portion of the main pipe is inserted and a fitting portion for positioning with respect to the main body portion are formed on the bottom side, and the first is on the opening side. And a second screw thread that is formed in a cylindrical shape with a bottom and that engages with the first screw thread in the cover body is formed on the opening side. A fixing member for fixing the cover main body to the main body in the threaded state of the strip,
The filter cleaning nozzle according to claim 6 or 7, wherein a fitting portion that can be fitted to the fitting portion is formed in the main body portion. The cover is configured with a collar portion,
The fin is formed with a fin or a vent hole that receives an exhaust air flow of the jetted compressed air and rotates the filter cleaning nozzle with respect to the air supply pipe connected to the connection portion. Item 9. A filter cleaning nozzle according to any one of Items 6 to 8. A nozzle for cleaning a filter according to any one of claims 1 to 9,
The cylindrical filter is configured to be attachable to an opening of a cylindrical filter serving as a cleaning object, and through which an air supply pipe connected to the filter cleaning nozzle can be inserted, and from the filter cleaning nozzle. A filter cleaning tool comprising: a closing member formed with a discharge port for discharging compressed air injected into the inside together with dust in the cylindrical filter.

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