A spray dust removal device for factory production

Abstract

The present invention relates to the technical field of spray dust removal, and discloses a spray dust removal device for factory production, comprising: a spray main pipe, multiple water outlet ends of the spray main pipe are all provided with a spray branch pipe distributed along the factory shed columns of the factory area, and the ends of several spray branch pipes away from the spray main pipe are all provided with a factory shed beam spray pipe fixed in the factory shed beam, and several spray nozzles are provided on the factory shed beam spray pipe, and a control mechanism for adjusting the spray direction of the spray nozzle according to the travel direction of the operating vehicle is connected between the spray nozzle and the factory shed beam spray pipe. The present invention controls the spray nozzle to turn to the direction of vehicle travel through a driving part, and can accurately supplement the air flow and water mist driven by the movement of the vehicle. This directional water spraying method effectively reduces the possibility of dust being lifted up by vehicle wheels, maintains the cleanliness of the workshop air, and ensures that the spray nozzle is always aimed at the area where the vehicle may lift up dust, so as to achieve a comprehensive dust prevention effect.

Description

Technical Field

[0001] The invention relates to the field of spray dust removal, and more specifically, to a spray dust removal device for factory production. Background Art

[0002] With the acceleration of industrialization, the concrete product manufacturing industry is facing severe environmental challenges while developing rapidly, especially the increasingly prominent dust pollution problem. In the production process of concrete products, such as mixing, conveying, and molding, a large amount of dust will be generated. This dust not only seriously pollutes the internal environment of the workshop and affects the health of employees, but may also spread through the air and cause secondary pollution to the surrounding environment.

[0003] Setting up a spray dust suppression system in a concrete product production workshop is an effective, environmentally friendly and economical way to suppress dust. First, the water supply pump is started to pump water from the water source into the main pipe. The water in the main pipe is distributed to the water pipes on each shed beam. The water flows through the water pipes to the sprinkler head, which sprays the water in the form of mist to cover the entire workshop.

[0004] In the actual operation of a concrete product production workshop, when a forklift is operating in the workshop, its huge body and fast-moving characteristics will inevitably disturb the surrounding water mist, causing these fine water mist particles to flow along the forklift's travel trajectory. At this time, the wheels rub against the ground, thereby increasing the risk of flying dust being raised. For this reason, we propose a spray dust removal device for factory production. Summary of the invention

[0005] The present invention provides a spray dust removal device for factory production, which solves the technical problem in the related art that when a forklift is operating in a workshop, its huge body and fast-moving characteristics will inevitably disturb the surrounding water mist, causing these fine water mist particles to flow along the travel trajectory of the forklift, and at this time the wheels rub against the ground, thereby increasing the risk of flying dust being raised.

[0006] The present invention provides a spray dust removal device for factory production, comprising: a spray main pipe, multiple water outlet ends of the spray main pipe are each provided with a spray branch pipe distributed along the factory shed columns of the factory area, multiple spray branch pipes are each provided with a factory shed beam spray pipe fixed in the factory shed beam at one end away from the spray main pipe, multiple spray nozzles are provided on the factory shed beam spray pipe, and a control mechanism for adjusting the spray direction of the spray nozzle according to the traveling direction of the working vehicle is connected between the spray nozzle and the factory shed beam spray pipe;

[0007] The regulating mechanism includes a positioning member, a driving member and a residual clearing pushing member. The air inlet end of the driving member is respectively connected to the positioning member and the residual clearing pushing member. The driving member is used to push the sprinkler nozzle to swing in the direction of the operating vehicles in the factory area. The positioning member is located on the ground of the factory area and is used to detect the direction of the operating vehicles in the factory area in real time. The residual clearing pushing member is used to control the spraying direction of the sprinkler nozzle to rotate to the adjacent side of the factory shed beam for spraying water when the factory stops operating.

[0008] Furthermore, the positioning component includes a factory ground air box embedded in the factory floor, and each sprinkler pipe corresponds to a factory ground air box. Two air storage chambers for storing air are provided inside the factory ground air box, and the two air storage chambers are not connected to each other. The output end of the factory ground air box is connected to a gas transmission pipe.

[0009] Furthermore, two mutually unconnected thin tubes are arranged inside the gas delivery pipe 1, and the two thin tubes are respectively connected to the corresponding gas storage chambers. An expansion airbag is arranged in the gap between the two thin tubes, and the two ends of the expansion airbag respectively penetrate the tube wall of the thin tube.

[0010] Furthermore, the driving part includes a nozzle swivel fixedly connected to the factory shed beam spray pipe, and the nozzle swivel is rotatably connected to the spray head. At the same time, the spray head is interconnected with the factory shed beam spray pipe through a hose, and the rotation angle range of the spray head and the nozzle swivel is 0-180°.

[0011] Furthermore, two elastic expansion air columns are fixedly arranged on both sides of the spray head, and an air collecting box fixedly connected to the spray head swivel seat is fixedly arranged at one end of the expansion air column away from the spray head. The air collecting box corresponds to the expansion air column one by one, and the air collecting box and the expansion air column are connected to each other.

[0012] Furthermore, the end of the gas pipe 1 away from the factory ground gas box is connected to a collecting gas pipe, and three unconnected pipes are penetrated inside the collecting gas pipe, namely two thin tubes and a gas pipe 2, and the ends of the two thin tubes away from the factory ground gas box are respectively interconnected with an expansion gas column located on both sides of the sprinkler nozzle, and the gas pipe 2 is interconnected with an expansion gas column on one side of the sprinkler nozzle.

[0013] Furthermore, the residual cleaning pusher includes a guide gushing column located inside the spray branch pipe, the water inlet end of the guide gushing column is connected to the spray main pipe, a cross box is fixedly provided on the top outer wall of the guide gushing column, and a wire collection column is rotatably provided inside the cross box.

[0014] Furthermore, a coil spring is fixedly provided at one end of the take-up column, a pull rope passing through the cross box is wound on the take-up column, a piston body is fixedly provided at one end of the pull rope away from the cross box, and the piston body is slidably connected to the guide gushing column.

[0015] Furthermore, a center plate is fixedly provided at the center position of the top water outlet end of the guiding gushing column, and limiting strips are rotatably provided on both sides of the center plate, and blocking films are fixedly provided on the two limiting strips, and the diameter of the blocking films is larger than the diameter of the water outlet of the guiding gushing column, and an elastic band is fixedly provided on the side of the two limiting strips away from the blocking films, and the end of the elastic band away from the limiting strips is fixedly connected to the inner wall of the guiding gushing column.

[0016] Furthermore, a plurality of contraction walls are fixedly embedded in the inner wall of the spray branch pipe, a waist ring with a diameter smaller than the inner wall diameter of the spray branch pipe is arranged at the center of the contraction wall, and the gas outlet ends of the plurality of contraction walls are interconnected with the gas transmission pipe 2.

[0017] The beneficial effects of the present invention are:

[0018] The present invention combines the positioning piece on the ground of the factory area, and the positioning piece can sense the direction of travel of the working vehicle in real time. The positioning piece is crushed by the working vehicle to allow gas to enter the driving piece, providing power for the driving piece to drive the spray nozzle to rotate. The driving piece controls the spray nozzle to turn to the direction of travel of the vehicle, and can accurately supplement the air flow and water mist driven by the movement of the vehicle. This directional water spraying method effectively reduces the possibility of dust being raised by vehicle wheels, maintains the cleanliness of the workshop air, ensures that the spray nozzle is always aimed at the area where the vehicle may raise dust, and achieves a comprehensive dust prevention effect.

[0019] When the factory stops operating, the residual water pushing parts can start automatically to push and spray out the remaining water in the water pipe without manual intervention, which greatly improves work efficiency and convenience of operation. The design of the driving parts enables the spray nozzles to rotate and spray toward adjacent shed beams or spray nozzles while emptying the remaining water. This multi-angle spraying method can more thoroughly clean the surface of the shed beams and spray nozzles, reducing the accumulation of dust and dirt. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the entire present invention at the production plant location;

[0021] Figure 2 The present invention Figure 1 The enlarged schematic diagram at A in the middle;

[0022] Figure 3 It is a schematic diagram of the structure of the spray main pipe of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal structure of the guide gushing column of the present invention;

[0024] Figure 5 The present invention Figure 4 The enlarged schematic diagram of point B in the middle;

[0025] Figure 6 The present invention Figure 4 The enlarged schematic diagram at C in the middle;

[0026] Figure 7 It is a schematic diagram of the internal structure of the cross box of the present invention;

[0027] Figure 8 It is a schematic diagram of the nozzle rotating seat structure of the present invention;

[0028] Fig. 9 It is a schematic diagram of the internal structure of the factory ground air box of the present invention.

[0029] In the figure: 11. Spray main pipe; 12. Spray nozzle; 13. Factory shed beam spray pipe; 14. Spray branch pipe; 2. Control mechanism; 21. Collecting air pipe; 22. Gas supply pipe 1; 23. Factory ground air box; 24. Diversion air pipe; 25. Expansion air column; 26. Gas supply pipe 2; 27. Collecting air box; 28. Spray nozzle swivel seat; 29. ​​Capillary; 201. Expansion air bag; 202. Air storage chamber; 31. Guide gushing column; 32. Cross box; 33. Piston body; 34. Contraction wall; 35. Waist ring; 36. Pull rope; 37. Take-up column; 38. Coil spring; 39. Center plate; 301. Limiting slats; 302. Elastic band; 303. Blocking film. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0031] like Figure 1 - Fig. 9 As shown, a spray dust removal device for factory production includes: a spray main pipe 11, multiple water outlet ends of the spray main pipe 11 are each provided with a spray branch pipe 14 distributed along the factory shed columns of the factory area, and one end of the multiple spray branch pipes 14 away from the spray main pipe 11 is provided with a factory shed beam spray pipe 13 fixed in the factory shed beam, and the factory shed beam spray pipe 13 is provided with a plurality of spray nozzles 12;

[0032] Setting up a spray dust reduction system in a concrete product production workshop is an effective, environmentally friendly and economical way of dust reduction. It is started by a water supply pump to draw water from the water source into the spray main pipe 11. The water in the spray main pipe 11 is distributed to the spray branch pipes 14 in the factory shed columns of each factory area. The water in the spray branch pipes 14 is distributed to the corresponding factory shed beam spray pipes 13. Finally, the spray nozzles 12 spray water in the form of mist to cover the entire workshop to achieve the purpose of cooling, dust removal or increasing humidity.

[0033] A control mechanism 2 is connected between the spray nozzle 12 and the factory shed beam spray pipe 13 for adjusting the spray direction of the spray nozzle 12 according to the travel direction of the working vehicle;

[0034] The control mechanism 2 includes a positioning member, a driving member and a residual cleaning push member. The air inlet end of the driving member is connected to the positioning member and the residual cleaning push member respectively. The driving member is used to push the spray nozzle 12 to swing in the direction of the working vehicle in the factory area. The positioning member is located on the ground of the factory area and is used to detect the direction of the working vehicle in the factory area in real time. The residual cleaning push member is used to control the spray direction of the spray nozzle 12 to rotate to the side of the adjacent factory shed beam to spray water when the factory area stops running;

[0035] Combined with the positioning piece on the ground of the factory area, the positioning piece can sense the direction of travel of the working vehicle in real time. The positioning piece is crushed by the working vehicle to allow gas to enter the driving piece, providing power for the driving piece to drive the spray nozzle 12 to rotate. The driving piece controls the spray nozzle 12 to turn in the direction of the vehicle, which can accurately supplement the air flow and water mist driven by the movement of the vehicle. This directional water spraying method effectively reduces the possibility of dust raised by vehicle wheels, maintains the cleanliness of the workshop air, and ensures that the spray nozzle 12 is always aimed at the area where the vehicle may raise dust, achieving a comprehensive dust prevention effect.

[0036] When the factory stops operating, the residual water pushing part can be automatically started to push and spray out the remaining water in the water pipe without manual intervention, which greatly improves work efficiency and convenience of operation. The design of the driving part enables the spray nozzle 12 to rotate and spray toward the adjacent shed beams or spray nozzles 12 while emptying the remaining water. This multi-angle spraying method can more thoroughly clean the surface of the shed beams and the spray nozzles 12, reducing the accumulation of dust and dirt.

[0037] The positioning component includes a factory floor air box 23 embedded in the factory floor, and each spray branch pipe 14 corresponds to a factory floor air box 23. Two air storage chambers 202 for storing air are provided inside the factory floor air box 23, and the two air storage chambers 202 are not connected to each other. The output end of the factory floor air box 23 is connected to a gas supply pipe 22.

[0038] Two unconnected capillaries 29 are disposed inside the gas delivery pipe 22 . The two capillaries 29 are connected to the corresponding gas storage chambers 202 . An inflatable airbag 201 is disposed in the gap between the two capillaries 29 , and both ends of the inflatable airbag 201 pass through the walls of the capillaries 29 .

[0039] The driving part includes a nozzle swivel seat 28 fixedly connected to the factory shed beam spray pipe 13, and the nozzle swivel seat 28 is rotatably connected to the spray nozzle 12. At the same time, the spray nozzle 12 is interconnected with the factory shed beam spray pipe 13 through a hose. The rotation angle range of the spray nozzle 12 and the nozzle swivel seat 28 is 0-180°.

[0040] Two elastic expansion air columns 25 are fixedly provided on both sides of the spray head 12. An air collecting box 27 fixedly connected to the spray head rotating seat 28 is fixedly provided at one end of the expansion air column 25 away from the spray head 12. The air collecting box 27 corresponds to the expansion air column 25 one by one, and the air collecting box 27 and the expansion air column 25 are interconnected. A diversion air pipe 24 is provided at the air inlet end of the air collecting box 27.

[0041] The end of the gas pipe 1 22 away from the factory ground gas box 23 is connected to the collecting gas pipe 21. Three unconnected pipes are penetrated inside the collecting gas pipe 21, namely two thin tubes 29 and a gas pipe 2 26. The ends of the two thin tubes 29 away from the factory ground gas box 23 are respectively connected to an expansion gas column 25 located on both sides of the sprinkler nozzle 12, and the gas pipe 2 26 is connected to an expansion gas column 25 on one side of the sprinkler nozzle 12.

[0042] In a processing workshop for concrete products, a variety of operating vehicles are required, such as forklifts and shovels. When operating vehicles are moving in the workshop, they will roll over the air box 23 on the ground in the plant area. If the vehicle moves to the left, the vehicle will first roll over one of the two air storage chambers 202 on the right side of the air box 23 on the ground in the plant area. When the air storage chamber 202 on the right side is rolled over by the wheels, the air storage chamber 202 flows into the air collection box 27 on the right side through the corresponding capillary 29, and then flows into the expansion air column 25 from the air collection box 27, so that the expansion air column 25 expands and extends, so that the expansion and extension of the expansion air column 25 can push the spray nozzle 12 to rotate clockwise, control the spray nozzle 12 to turn to the direction of the vehicle's movement, and can accurately supplement the air flow and water mist driven by the movement of the vehicle. If the vehicle moves to the right, the opposite is true;

[0043] If the vehicle moves to the left, it will first run over one of the two air storage chambers 202 on the right side of the factory ground air box 23. When the right air storage chamber 202 is run over by the wheel, the air in this air storage chamber 202 flows into the corresponding capillary 29. This capillary 29 can rush into the expansion airbag 201 when taking in air, and make the expansion airbag 201 inflate in the other capillary 29, thereby blocking the air circulation of this capillary 29. Later, when the vehicle runs over the other air storage chamber 202, the air will not flow into the corresponding capillary 29.

[0044] The residual cleaning pusher includes a guide gushing column 31 located inside the spray branch pipe 14, the water inlet end of the guide gushing column 31 is connected to the spray main pipe 11, a cross box 32 is fixedly provided on the top outer wall of the guide gushing column 31, and a wire collection column 37 is rotatably provided inside the cross box 32.

[0045] A coil spring 38 is fixedly provided at one end of the take-up column 37 , a pull rope 36 passing through the cross box 32 is wound around the take-up column 37 , a piston body 33 is fixedly provided at one end of the pull rope 36 away from the cross box 32 , and the piston body 33 is slidably connected to the guide gushing column 31 .

[0046] A center plate 39 is fixedly provided at the center position of the top water outlet end of the guiding gushing column 31, and limiting strips 301 are rotatably provided on both sides of the center plate 39. Blocking films 303 are fixedly provided on the two limiting strips 301, and the diameter of the blocking films 303 is larger than the diameter of the water outlet of the guiding gushing column 31. An elastic band 302 is fixedly provided on one side of the two limiting strips 301 away from the blocking films 303, and one end of the elastic band 302 away from the limiting strips 301 is fixedly connected to the inner wall of the guiding gushing column 31.

[0047] A plurality of contraction walls 34 are fixedly inlaid on the inner wall of the spray branch pipe 14 , a waist ring 35 having a diameter smaller than that of the inner wall of the spray branch pipe 14 is arranged at the center of the contraction wall 34 , and the gas outlet ends of the plurality of contraction walls 34 are interconnected with the gas delivery pipe 2 26 .

[0048] When the production workshop stops operating, the water supply pump stops supplying water. When no water is supplied to the spray branch pipe 14, the piston body 33 loses the pressure from top to bottom, and the pull rope 36 is wound up by the four take-up columns 37, so that the piston body 33 is pulled up along the guide spray column 31 by the four pull ropes 36. At the same time, the remaining water in the guide spray column 31 is pushed upward into the factory shed beam spray pipe 13 through the rising piston body 33, and then sprayed out by the multiple spray nozzles 12;

[0049] As the piston body 33 rises, it squeezes the multiple contraction walls 34 from bottom to top, and the air in the contraction walls 34 flows into one of the expansion air columns 25 through the air supply pipe 26. The expansion and extension of the expansion air column 25 pushes the spray head 12 to rotate, causing it to rotate and spray toward the adjacent shed beams or spray heads 12. This multi-angle spraying method can more thoroughly clean the surface of the shed beams and the spray heads 12, reduce the accumulation of dust and dirt, and when the piston body 33 leaves the contraction wall 34, it is reset through the waist ring 35, and the multiple contraction walls 34 are interconnected with the air supply pipe 26 through pipelines.

[0050] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A spray dust removal device for factory production, comprising: A spray main pipe (11), wherein each of the plurality of water outlet ends of the spray main pipe (11) is provided with a spray branch pipe (14) distributed along the plant shed columns of the plant area, and each of the plurality of spray branch pipes (14) is provided with a plant shed beam spray pipe (13) fixed in the plant shed beam at one end away from the spray main pipe (11), and the plant shed beam spray pipe (13) is provided with a plurality of spray nozzles (12), characterized in that a control mechanism (2) is connected between the spray nozzle (12) and the plant shed beam spray pipe (13) for adjusting the spray direction of the spray nozzle (12) according to the travel direction of the working vehicle; The control mechanism (2) comprises a positioning member, a driving member and a residual cleaning pushing member, the air inlet end of the driving member being connected to the positioning member and the residual cleaning pushing member respectively, the driving member being used to push the spray nozzle (12) to swing in the direction of a working vehicle in the factory area, the positioning member being located on the ground of the factory area and being used to detect the direction of a working vehicle in the factory area in real time, and the residual cleaning pushing member being used to control the spraying direction of the spray nozzle (12) to rotate to the side of an adjacent factory shed beam to spray water when the factory area stops operating; The positioning component comprises a plant floor air box (23) embedded in the plant floor, and each spray branch pipe (14) corresponds to a plant floor air box (23). Two air storage chambers (202) for storing air are provided inside the plant floor air box (23), and the two air storage chambers (202) are not connected to each other. The output end of the plant floor air box (23) is connected to a gas transmission pipe 1 (22); Two mutually disconnected thin tubes (29) are arranged inside the gas delivery pipe (22); the two thin tubes (29) are respectively connected to the corresponding gas storage chambers (202); an expansion air bag (201) is arranged in the gap between the two thin tubes (29), and the two ends of the expansion air bag (201) respectively penetrate the tube wall of the thin tube (29); The driving member comprises a nozzle rotating seat (28) fixedly connected to the factory shed beam spray pipe (13), and the nozzle rotating seat (28) is rotatably connected to the spray nozzle (12), and the spray nozzle (12) is communicated with the factory shed beam spray pipe (13) through a hose, and the rotation angle range of the spray nozzle (12) and the nozzle rotating seat (28) is 0-180 degrees; Two elastic expansion gas columns (25) are fixedly arranged on both sides of the spray nozzle (12), and an air collecting box (27) fixedly connected to the nozzle rotating seat (28) is fixedly arranged at one end of the expansion gas column (25) away from the spray nozzle (12), and the air collecting box (27) and the expansion gas column (25) correspond to each other one by one, and the air collecting box (27) and the expansion gas column (25) are connected to each other; The end of the gas delivery pipe 1 (22) away from the plant ground gas box (23) is connected to a collecting gas pipe (21), and the collecting gas pipe (21) is provided with three mutually unconnected pipes, namely two thin tubes (29) and a gas delivery pipe 2 (26), and the ends of the two thin tubes (29) away from the plant ground gas box (23) are respectively connected to an expansion gas column (25) located on both sides of the spray nozzle (12), and the gas delivery pipe 2 (26) is connected to an expansion gas column (25) on one side of the spray nozzle (12); When a vehicle is moving, it will first run over one of the two air storage chambers (202) in the air box (23) on the ground of the factory area. When the air storage chamber (202) is run over by the wheel, the air in the air storage chamber (202) flows into the corresponding air collecting box (27) through the corresponding capillary (29), and then flows into the expansion air column (25) from the air collecting box (27), causing the expansion air column (25) to expand and extend. The expansion and extension of the expansion air column (25) drives the spray nozzle (12) to rotate, and the gas in this capillary (29) is filled into the expansion air bag (201) when air is taken in, and the expansion air bag (201) is expanded in the other capillary (29), thereby blocking the air circulation of the other capillary (29). Afterwards, when the vehicle runs over the other air storage chamber (202), the air does not flow into the other capillary (29).

2. A spray dust removal device for factory production according to claim 1, characterized in that: The cleaning and pushing member comprises a guide gushing column (31) located inside the spray branch pipe (14), the water inlet end of the guide gushing column (31) being in communication with the spray main pipe (11), a cross box (32) being fixedly provided on the top outer wall of the guide gushing column (31), and a wire collection column (37) being rotatably provided inside the cross box (32); A coil spring (38) is fixedly provided at one end of the take-up column (37), a pull rope (36) passing through the cross box (32) is wound around the take-up column (37), a piston body (33) is fixedly provided at one end of the pull rope (36) away from the cross box (32), and the piston body (33) is slidably connected to the guide gushing column (31); A center plate (39) is fixedly provided at the center position of the top water outlet end of the guide gushing column (31), and limiting strips (301) are rotatably provided on both sides of the center plate (39), and blocking films (303) are fixedly provided on the two limiting strips (301), and the diameter of the blocking films (303) is larger than the diameter of the water outlet of the guide gushing column (31), and an elastic band (302) is fixedly provided on one side of the two limiting strips (301) away from the blocking films (303), and one end of the elastic band (302) away from the limiting strips (301) is fixedly connected to the inner wall of the guide gushing column (31); When water is no longer supplied to the spray branch pipe (14), the piston body (33) loses the pressure from top to bottom, and the pull rope (36) is reeled in by the four reeling columns (37), so that the piston body (33) is pulled up along the guide spouting column (31) by the four pull ropes (36), and at the same time, the remaining water in the spray branch pipe (14) is pushed upward into the factory shed beam spray pipe (13) by the rising of the piston body (33).

3. A spray dust removal device for factory production according to claim 2, characterized in that: A plurality of contraction walls (34) are fixedly embedded in the inner wall of the spray branch pipe (14); a waist ring (35) having a diameter smaller than the inner wall diameter of the spray branch pipe (14) is arranged at the center of the contraction wall (34); and the gas outlet ends of the plurality of contraction walls (34) are interconnected with the second gas delivery pipe (26); As the piston body (33) rises, it squeezes the multiple contraction walls (34) from bottom to top, and the air in the contraction walls (34) flows into one of the expansion air columns (25) through the second air supply pipe (26). The expansion and extension of the expansion air column (25) pushes the spray nozzle (12) to rotate, causing it to rotate and spray toward the adjacent shed beam or spray nozzle (12). When the piston body (33) leaves the contraction wall (34), it is reset by the waist ring (35). The multiple contraction walls (34) are interconnected with the second air supply pipe (26) through pipelines.

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