Adjustable coal conveying oscillating screen

Abstract

The invention relates to the technical field of oscillating screens, and provides an adjustable coal conveying oscillating screen which comprises a bottom plate, first side plates are fixedly connected to the upper sides of the left end and the right end of the bottom plate correspondingly, photoelectric switches are fixedly connected to the middles of the first side plates, and a shell is jointly arranged on the inner sides of the first side plates; fixing pins are fixedly connected to the front side and the rear side of the left end and the right end of the shell, swing rods are rotationally connected to the outer ends of the fixing pins, and fixing rods are jointly rotationally connected to the upper ends of the swing rods on the two sides of the same end of the shell. An arranged movable strip is connected with a second side plate through a first connecting ring and a pull rod, in the swinging process of the shell, the movable strip and a triangular material stirring plate are pulled to move left and right relative to a screen on one side, so that screened materials are fluctuated, the blocked screen is cleaned, water mist is sprayed out through a mist spraying head, and the screening efficiency is improved. Thus, a large amount of dust is prevented from being generated in the screening process.

Description

Technical Field

[0001] The invention relates to the technical field of swing screens, in particular to an adjustable coal conveying swing screen. Background Art

[0002] An oscillating screen is a device that uses mechanical vibration to screen, grade, or filter granular and powdered materials. Its operating principle is to use a drive mechanism to cause the screen to oscillate regularly. The combined effects of vibration and gravity on the material on the screen surface allow for the separation of materials of varying particle sizes, densities, and shapes. Efficient coal conveying is crucial in the coal production and processing industry. As a key piece of equipment, the oscillating screen is responsible for screening and grading coal, and its performance directly impacts production efficiency and coal quality.

[0003] Traditional coal conveying swing screens have exposed numerous problems over long-term practice. For one thing, the screen angle is typically fixed, making it difficult to meet the diverse coal screening requirements of different coal qualities and production processes. For example, with high-moisture and high-viscosity coal, the fixed-angle screen easily causes material to accumulate on the screen surface, clogging the mesh, significantly reducing screening efficiency and making it impossible to meet production schedules. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides an adjustable coal conveying swing screen, which solves the problem that the screen body is fixed and cannot be adjusted in angle and is prone to clogging.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an adjustable coal conveying swing screen, comprising a bottom plate, the upper sides of the left and right ends of the bottom plate are fixedly connected to first side plates, the middle part of the first side plate is fixedly connected to a photoelectric switch, the inner side of the first side plate is commonly provided with a shell, the front and rear sides of the left and right ends of the shell are fixedly connected to fixing pins, the outer ends of the fixing pins are rotatably connected to swing rods, the upper ends of the swing rods on both sides of the same end of the shell are rotatably connected to fixing rods, the fixing rod at the left end of the shell is fixedly connected to the upper end of the first side plate at the left end of the bottom plate, and the fixing rod at the right end of the shell is fixedly connected to the upper end of the first side plate at the left end of the bottom plate. The adjusting component is connected to the top of the first side plate at the right end of the bottom plate, and the middle inner side of the shell is fixedly connected to the screen, the upper left end of the shell is fixedly connected to the first air guide port, and the lower left end of the shell is fixedly connected to the second air guide port, the front and rear sides of the inner wall of the shell are fixedly connected to triangular bars, and the lower side of the triangular bar is connected to a movable bar for sliding left and right, and the opposite side of the movable bar is fixedly connected to a triangular material stripping plate, the lower side of the triangular material stripping plate is tightly attached to the upper side of the screen, the top right end of the movable bar is fixedly connected to a first connecting ring, and the upper right end of the bottom plate is provided with a driving component for driving the shell to swing.

[0006] Preferably, the adjustment assembly includes a fixed plate fixedly connected to the inner side of the upper end of the first side plate at the right end of the base plate, and limiting rods are passed through the front and rear ends of the fixed plate, and the bottoms of the limiting rods are commonly fixedly connected to a lifting plate, and the lower sides of the front and rear ends of the lifting plate are fixedly connected to fixing ears, and the front and rear ends of the fixing rod at the right end of the shell are rotatably connected to the middle of the fixing ears.

[0007] Preferably, a screw rod is threadedly connected to the middle portion of the fixed plate, the lower end of the screw rod is rotatably connected to the middle portion of the upper side of the lifting plate, and the top of the screw rod is fixedly connected to a hand wheel.

[0008] Preferably, the driving assembly includes a second side plate fixedly connected to the middle part of the upper right end of the base plate, the middle part of the upper end of the second side plate is rotatably connected to a rotating shaft, the opposite ends of the rotating shaft are fixedly connected to a rotating wheel, and the right ends of the rotating wheels are commonly fixedly connected to an eccentric shaft.

[0009] Preferably, the drive assembly also includes a second connecting ring rotatably connected to the outside of the eccentric shaft, the outside of the second connecting ring is fixedly connected to a push rod, the left end of the push rod is movably connected to a telescopic rod internally, the left end of the telescopic rod is fixedly connected to a first connecting member, the outside of the first connecting member is rotatably connected to a second connecting member, and the left end of the second connecting member is fixedly connected to the middle right side of the shell.

[0010] Preferably, a plurality of adjustment holes are provided in the middle of the telescopic rod, a bolt hole is provided at the left end of the push rod, and a latch is provided through both the bolt hole and the adjustment hole.

[0011] Preferably, a servo motor is fixedly connected to the upper side of the right end of the base plate, a driving end of the servo motor is fixedly connected to a transmission wheel, and the transmission wheel and the rotating wheel are connected by a belt.

[0012] Preferably, both the front and rear sides of the second side plate are fixedly connected with mounting columns, the ends of the mounting columns are rotatably connected with pull rods, and the left end of the pull rods is rotatably connected to the middle of the first connecting ring.

[0013] Preferably, the top of the first side plate is fixedly connected to a top plate, a plurality of bayonet holes are provided on the upper side of the top plate, a diversion pipe is embedded inside the bayonet hole, and a spray head is fixedly connected to the lower side of the diversion pipe.

[0014] Preferably, a main water pipe is provided on the front side of the first side plate at the front end of the bottom plate, and fixing rings are provided on the outside of the left and right ends of the main water pipe. The rear end of the fixing ring is fixedly connected to the inside of the first side plate, and a plurality of connecting pipes are fixedly connected to the upper side of the main water pipe, and the ends of the connecting pipes are installed on the outside of the diversion pipe.

[0015] Working principle: The servo motor is started to drive the transmission wheel to rotate. The rotating transmission wheel drives the rotating wheel to rotate through the rotating shaft through the belt, thereby driving the eccentric shaft to rotate. The rotating eccentric shaft drives the push rod to the left reciprocatingly through the second connecting ring to push the shell to move. The push rod is connected to the shell through the second connecting piece, the first connecting piece and the second connecting piece. The telescopic rod can be pulled out from the push rod to adjust the length of the telescopic rod and the push rod.

[0016] The shell is connected to the first side plate through a swing rod and can be swung left and right by the swing rod. During the swinging process of the shell, the material is screened through the screen arranged on the inner side thereof, small particles and powder pass through the screen and are discharged from the second guide port, and large pieces of material remain on the upper side of the screen and are discharged from the first guide port. The movable bar is connected to the second side plate through the first connecting ring and the pull rod. During the swinging process of the shell, the movable bar and the triangular material-diverting plate are pulled to move left and right relative to the screen on one side, thereby diverting the material to be screened and cleaning the clogged screen.

[0017] The lifting plate is connected to the fixed plate through a limit rod and can be adjusted up and down. The screw rod is driven by the hand wheel to rotate, thereby adjusting the lifting plate. The lifting plate is connected to the fixed rod through the fixing ear. When adjusting, the right end of the shell can be driven up and down to adjust the height, thereby adjusting the inclination angle of the screen. The user can adjust it according to needs; before adjusting, the pin is pulled out. During the adjustment process, the telescopic rod will be pulled to move in the push rod. After the inclination angle of the shell is adjusted, the pin is inserted into the corresponding bolt hole and adjustment hole;

[0018] The end of the main water pipe is connected to the water source. During the screening process, water is injected into the diversion pipe through the transmission wheel, and water mist is sprayed out through the spray head, thereby avoiding the generation of a large amount of dust during the screening process.

[0019] The present invention provides an adjustable coal conveying swing screen, which has the following beneficial effects:

[0020] 1. The present invention can drive the right end of the shell to move up and down through the screw rod, hand wheel and lifting plate, thereby changing the inclination angle of the screen; by increasing the inclination angle of the screen surface, the material sliding speed can be accelerated, and the screening efficiency can be improved. There is no need to stop the equipment and disassemble it. The angle can be adjusted by the hand wheel, shortening the process switching time and improving the flexibility of the production line. It is particularly suitable for the scenario of screening multiple varieties of coal.

[0021] 2. The present invention drives the shell to swing back and forth through the servo motor, eccentric shaft and push rod, so that the material rolls and jumps evenly on the screen, the material contacts the screen more fully, and the penetration rate of fine particles is improved. At the same time, the triangular material-pickling plate is linked to the shell through the movable bar and the pull rod, and moves left and right synchronously during the screening process, continuously shifting the material on the screen surface, which not only promotes the penetration of fine particles, but also can promptly clean up the coal blocks or debris that block the screen holes, avoiding the efficiency loss caused by screen blockage.

[0022] 3. The present invention uses the photoelectric switch on the first side panel to cooperate with the swinging movement of the swing arm during the screening process to monitor the swinging state of the shell in real time. When the fixing pin breaks or falls off, it automatically issues an alarm to avoid equipment overload damage and improve operational safety. The diversion pipe and the spray head are connected to the water source through the main water pipe, and water mist is continuously sprayed during the screening process to suppress the diffusion of dust generated by coal screening, improve the working environment, and meet environmental protection standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of the present invention;

[0024] Figure 2 A schematic diagram of a lifting plate of the present invention;

[0025] Figure 3 Schematic diagram of the triangular stripping plate of the present invention;

[0026] Figure 4 Schematic diagram of the shunt pipe of the present invention;

[0027] Figure 5 A schematic diagram of a push rod of the present invention;

[0028] Figure 6 Schematic diagram of the runner of the present invention.

[0029] Among them, 1. bottom plate; 2. first side plate; 3. shell; 4. fixing pin; 5. swing rod; 6. fixing rod; 7. screen; 8. first guide port; 9. second guide port; 10. triangle bar; 11. movable bar; 12. triangle stripper plate; 13. first connecting ring; 14. photoelectric switch; 15. fixing plate; 16. limit rod; 17. lifting plate; 18. fixing ear; 19. screw rod; 20. hand wheel; 21. second side plate; 22. Rotating shaft; 23. Rotating wheel; 24. Eccentric shaft; 25. Second connecting ring; 26. Push rod; 27. Telescopic rod; 28. Adjustment hole; 29. ​​Bolt hole; 30. Latch; 31. First connecting piece; 32. Second connecting piece; 33. Servo motor; 34. Transmission wheel; 35. Mounting column; 36. Pull rod; 37. Top plate; 38. Bayonet; 39. Diverter pipe; 40. Spray head; 41. Main water pipe; 42. Fixing ring; 43. Connecting pipe. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example:

[0032] Please see the attached Figures 1-6 The embodiment of the present invention provides an adjustable coal conveying swing screen, including a bottom plate 1, the upper sides of the left and right ends of the bottom plate 1 are fixedly connected to the first side plates 2, the middle part of the first side plate 2 is fixedly connected to the photoelectric switch 14, the inner side of the first side plate 2 is commonly provided with a shell 3, the front and rear sides of the left and right ends of the shell 3 are fixedly connected to the fixing pins 4, the outer ends of the fixing pins 4 are rotatably connected to the swing rods 5, the upper ends of the swing rods 5 on both sides of the same end of the shell 3 are commonly rotatably connected to the fixing rods 6, the fixing rod 6 at the left end of the shell 3 is fixedly connected to the upper end of the first side plate 2 at the left end of the bottom plate 1, and the inner side of the upper end of the first side plate 2 at the right end of the bottom plate 1 is fixedly connected to the fixing plate 15, the front and rear ends of the fixing plate 15 are penetrated by limiting rods 16, the bottom of the limiting rod 16 is commonly fixedly connected to the lifting plate 17, and the front and rear ends of the lifting plate 17 are fixed at the lower sides It is connected to a fixing ear 18, and the front and rear ends of the fixing rod 6 at the right end of the shell 3 are rotatably connected to the middle part of the fixing ear 18. The middle part of the fixing plate 15 is threadedly connected to a screw rod 19, and the lower end of the screw rod 19 is rotatably connected to the upper middle part of the lifting plate 17. The top of the screw rod 19 is fixedly connected to a handwheel 20, and the middle part of the inner side of the shell 3 is fixedly connected to the screen 7. The upper left end of the shell 3 is fixedly connected to the first guide port 8, and the lower left end of the shell 3 is fixedly connected to the second guide port 9. The front and rear sides of the inner wall of the shell 3 are fixedly connected with a triangular bar 10, and the lower side of the triangular bar 10 is slidably connected to the movable bar 11. The opposite side of the movable bar 11 is commonly fixedly connected with a triangular material stripping plate 12, and the lower side of the triangular material stripping plate 12 is tightly attached to the upper side of the screen 7. The top right end of the movable bar 11 is fixedly connected to a first connecting ring 13.

[0033] The swing rod 5 is connected to the shell 3 through the fixed pin 4 and can rotate, and the upper end of the swing rod 5 is connected to the upper end of the first side plate 2, so that the shell 3 can swing. During the swinging process, the material rolls and jumps evenly on the screen 7, the material contacts the screen 7 more fully, and the penetration rate of fine particles is improved. The movable bar 11 and the triangular material-diverting plate 12 are moved left and right during the swinging of the shell 3, so that the material is diverted by the triangular material-diverting plate 12, avoiding the traditional swinging trajectory, such as linear or elliptical motion, which has limited effect on particle stratification and makes it difficult for fine particles to pass through the screen. At the same time, the screen 7 can be cleaned to avoid clogging problems; the traditional swing screen will cause the fixed pin 4 to fall off or break after working for a long time, and after the fixed pin 4 of the traditional swing screen breaks, the device cannot stop in time, which will cause the shell 3 to swing unbalanced, thereby increasing the degree of damage to the device. The photoelectric switch 14 can The infrared switch light path is cut off by the reciprocating swing of the swing rod 5, which is used to monitor the operation of the device. When the fixing pin 4 breaks or falls off, the swing rod 5 stops swinging and triggers the photoelectric switch 14. After the control system receives the signal from the photoelectric switch 14, it will make a logical judgment based on the newly added delay relay of the system and stop the operation of the device in time; the screw rod 19 is driven to rotate by the provided handwheel 20, so as to adjust the lifting plate 17. The provided lifting plate 17 is connected to the fixed rod 6 through the fixed ear 18. When adjusting, the right end of the shell 3 can be driven to adjust the height up and down, thereby adjusting the inclination angle of the screen 7. The user can adjust it according to needs; by increasing the inclination angle of the screen surface 7, the material sliding speed is accelerated, and the screening efficiency is improved. There is no need to stop the equipment and disassemble it. The angle adjustment can be achieved through the handwheel 20, which shortens the process switching time and improves the flexibility of the production line. It is especially suitable for the scenario of screening multiple types of coal.

[0034] The middle part of the upper right end of the bottom plate 1 is fixedly connected to the second side plate 21, and the middle part of the upper end of the second side plate 21 is rotatably connected to the rotating shaft 22. The opposite end of the rotating shaft 22 is fixedly connected to the rotating wheel 23. The right end of the rotating wheel 23 is fixedly connected to the eccentric shaft 24. The outer part of the eccentric shaft 24 is rotatably connected to the second connecting ring 25. The outer part of the second connecting ring 25 is fixedly connected to the push rod 26. The left end of the push rod 26 is movably connected to the telescopic rod 27. The left end of the telescopic rod 27 is fixedly connected to the first connecting member 31. The outer part of the first connecting member 31 is rotatably connected to the second connecting member 32. The left end is fixedly connected to the middle of the right side of the shell 3, a plurality of adjustment holes 28 are opened in the middle of the telescopic rod 27, a bolt hole 29 is opened at the left end of the push rod 26, and a pin 30 is passed through the inside of the bolt hole 29 and the adjustment hole 28. A servo motor 33 is fixedly connected to the upper side of the right end of the base plate 1, and the driving end of the servo motor 33 is fixedly connected to the transmission wheel 34. The transmission wheel 34 is connected to the rotating wheel 23 by a belt. The front and rear sides of the second side plate 21 are fixedly connected with mounting columns 35, and the end of the mounting column 35 is rotatably connected to the pull rod 36. The left end of the pull rod 36 is rotatably connected to the middle of the first connecting ring 13.

[0035] The servo motor 33 is started to drive the transmission wheel 34 to rotate. The rotating transmission wheel 34 drives the rotating wheel 23 to rotate through the rotating shaft 22 through the belt, thereby driving the eccentric shaft 24 to rotate. The rotating eccentric shaft 24 drives the push rod 26 to reciprocate to the left through the second connecting ring 25 to push the shell 3 to move. The push rod 26 is connected to the shell 3 through the second connecting member 32, the first connecting member 31 and the second connecting member 32, thereby driving the shell 3 and the screen 7 to screen the material; the telescopic rod 27 can be pulled out from the push rod 26, and the telescopic rod 27 and the push rod can be adjusted. The length of the rod 26 is used to ensure that the angle of the shell 3 and the screen can be adjusted normally. Before adjustment, the pin 30 is pulled out. During the adjustment process, the telescopic rod 27 will be pulled to move in the push rod 26. After the inclination angle of the shell 3 is adjusted, the pin 30 is inserted into the corresponding bolt hole 29 and the adjustment hole 28; the set pull rod 36 can be rotated through the connection with the mounting column 35 and is rotatably connected to the first connecting ring 13. During the swinging process of the shell 3, the movable bar 11 and the triangular material plate 12 are pulled to make it move left and right relative to the shell 3.

[0036] A top plate 37 is fixedly connected to the top of the first side panel 2, and a plurality of bayonet holes 38 are provided on the upper side of the top panel 37. A diversion pipe 39 is embedded in the inner side of the bayonet hole 38, and a spray head 40 is fixedly connected to the lower side of the diversion pipe 39. A main water pipe 41 is provided on the front side of the first side panel 2 at the front end of the bottom panel 1, and a fixing ring 42 is provided on the outside of the left and right ends of the main water pipe 41. The rear end of the fixing ring 42 is fixedly connected to the inside of the first side panel 2, and a plurality of connecting pipes 43 are fixedly connected to the upper side of the main water pipe 41. The ends of the connecting pipes 43 are installed on the outside of the diversion pipe 39.

[0037] The end of the main water pipe 41 is connected to a water source. During the screening process, water is injected into the diversion pipe 39 through the transmission wheel 34, and water mist is sprayed through the spray head 40, so that water mist is continuously sprayed during the screening process, thereby suppressing the diffusion of dust generated by coal screening, improving the working environment, and complying with environmental protection standards.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable coal conveying swing screen, characterized in that: The invention comprises a bottom plate (1), wherein the upper sides of the left and right ends of the bottom plate (1) are fixedly connected to the first side plate (2), the middle part of the first side plate (2) is fixedly connected to the photoelectric switch (14), the inner side of the first side plate (2) is commonly provided with a shell (3), the front and rear sides of the left and right ends of the shell (3) are fixedly connected to the fixing pins (4), the outer ends of the fixing pins (4) are rotatably connected to the swing rods (5), the upper ends of the swing rods (5) on both sides of the same end of the shell (3) are commonly rotatably connected to the fixing rods (6), the fixing rod (6) at the left end of the shell (3) is fixedly connected to the upper end of the first side plate (2) at the left end of the bottom plate (1), and the fixing rod (6) at the right end of the shell (3) is connected to the upper end of the first side plate (2) at the right end of the bottom plate (1) through an adjusting component. At the top, a screen (7) is fixedly connected to the middle of the inner side of the shell (3), a first air guide port (8) is fixedly connected to the upper left end of the shell (3), a second air guide port (9) is fixedly connected to the lower left end of the shell (3), and a triangular bar (10) is fixedly connected to both the front and rear sides of the inner wall of the shell (3), a movable bar (11) is slidably connected to the lower side of the triangular bar (10), and a triangular material-diverting plate (12) is fixedly connected to the opposite side of the movable bar (11), the lower side of the triangular material-diverting plate (12) is tightly attached to the upper side of the screen (7), a first connecting ring (13) is fixedly connected to the top of the right end of the movable bar (11), and a driving component for driving the shell (3) to swing is provided on the upper right end of the bottom plate (1).

2. The adjustable coal conveying swing screen according to claim 1, characterized in that: The adjustment assembly comprises a fixed plate (15) fixedly connected to the inner side of the upper end of the first side plate (2) at the right end of the base plate (1), a limiting rod (16) is passed through the front and rear ends of the fixed plate (15), the bottom of the limiting rod (16) is fixedly connected to a lifting plate (17), the lower sides of the front and rear ends of the lifting plate (17) are fixedly connected to fixing ears (18), and the front and rear ends of the fixing rod (6) at the right end of the shell (3) are rotatably connected to the middle of the fixing ear (18).

3. The adjustable coal conveying swing screen according to claim 2, characterized in that: The middle part of the fixed plate (15) is threadedly connected to a screw rod (19), the lower end of the screw rod (19) is rotatably connected to the middle part of the upper side of the lifting plate (17), and the top of the screw rod (19) is fixedly connected to a hand wheel (20).

4. The adjustable coal conveying swing screen according to claim 1, characterized in that: The driving assembly comprises a second side plate (21) fixedly connected to the middle portion of the upper side of the right end of the base plate (1); the middle portion of the upper end of the second side plate (21) is rotatably connected to a rotating shaft (22); opposite ends of the rotating shaft (22) are fixedly connected to a rotating wheel (23); and the right ends of the rotating wheels (23) are fixedly connected to an eccentric shaft (24).

5. The adjustable coal conveying swing screen according to claim 1, characterized in that: The driving assembly further comprises a second connecting ring (25) rotatably connected to the outside of the eccentric shaft (24); the outside of the second connecting ring (25) is fixedly connected to a push rod (26); the left end of the push rod (26) is movably connected to a telescopic rod (27); the left end of the telescopic rod (27) is fixedly connected to a first connecting member (31); the outside of the first connecting member (31) is rotatably connected to a second connecting member (32); the left end of the second connecting member (32) is fixedly connected to the middle of the right side of the housing (3).

6. The adjustable coal conveying swing screen according to claim 5, characterized in that: A plurality of adjustment holes (28) are provided in the middle of the telescopic rod (27), a bolt hole (29) is provided at the left end of the push rod (26), and a latch (30) is provided in both the bolt hole (29) and the adjustment hole (28).

7. The adjustable coal conveying swing screen according to claim 4, characterized in that: A servo motor (33) is fixedly connected to the upper side of the right end of the bottom plate (1), a driving end of the servo motor (33) is fixedly connected to a transmission wheel (34), and the transmission wheel (34) is connected to the rotating wheel (23) via a belt.

8. The adjustable coal conveying swing screen according to claim 4, characterized in that: The front and rear sides of the second side plate (21) are fixedly connected with mounting columns (35), the ends of the mounting columns (35) are rotatably connected with pull rods (36), and the left end of the pull rod (36) is rotatably connected to the middle of the first connecting ring (13).

9. The adjustable coal conveying swing screen according to claim 1, characterized in that: The top of the first side plate (2) is fixedly connected to a top plate (37), a plurality of bayonet holes (38) are provided on the upper side of the top plate (37), a diversion pipe (39) is embedded in the inner side of the bayonet hole (38), and a spray head (40) is fixedly connected to the lower side of the diversion pipe (39).

10. The adjustable coal conveying swing screen according to claim 1, characterized in that: A main water pipe (41) is provided on the front side of the first side plate (2) at the front end of the bottom plate (1), and fixing rings (42) are provided on the outside of both left and right ends of the main water pipe (41), and the rear end of the fixing ring (42) is fixedly connected to the inside of the first side plate (2). A plurality of connecting pipes (43) are fixedly connected to the upper side of the main water pipe (41), and the ends of the connecting pipes (43) are installed on the outside of the diversion pipe (39).

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