Industrial boiler with flue gas dust removal function

Abstract

The invention belongs to the field of industrial boilers, and particularly relates to an industrial boiler with a flue gas dust removal function, which comprises a boiler body and a flue gas dust removal box, the flue gas dust removal box is fixedly mounted on one side of the boiler body, a flue gas inlet pipe communicated with the boiler body is arranged on one side of the flue gas dust removal box, and a flue gas outlet pipe is mounted on one side of the flue gas dust removal box; a dust removal net is installed in the flue gas dust removal box, a control box is fixedly installed on one side of the flue gas dust removal box, a driving motor is fixedly installed on one side of the control box, the same driving shaft is rotationally installed on the inner walls of the two sides of the flue gas dust removal box, and an output shaft of the driving motor is fixedly connected with the driving shaft. The dust removal device is reasonable in design, the dust removal net can be cleaned through rotation of a beating ball, the inner wall of the flue gas dust removal box can be cleaned through up-down reciprocating movement of a frame plate and a brush plate, dust can be swept into an impurity discharging hole through rotation of a sweeping rod, and therefore the purpose of cleaning the dust is achieved.

Description

Technical Field

[0001] This invention relates to the field of industrial boiler technology, and in particular to an industrial boiler with flue gas dust removal function. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carrier with a certain amount of thermal energy. The original meaning of "boiler" refers to a water-filled container heated over a fire, while "furnace" refers to the place where fuel is burned. A boiler consists of two main parts: the boiler and the furnace. According to a search, the patent document with authorization announcement number CN210993460U discloses an industrial boiler exhaust gas treatment device, which includes a base plate. The four corners of the bottom of the base plate are fixedly connected to support feet. The front and rear ends of the top left side of the base plate are provided with support mechanisms. The top of the support mechanism is fixedly connected to the boiler body. This utility model, through the coordinated arrangement of a housing, fixed column, baffle, exhaust trough, dustproof net, sterilization box, ultraviolet germicidal lamp, first connecting pipe, first filter box, first filtration mechanism, second connecting pipe, second filter box, second filtration mechanism, exhaust pipe, exhaust fan, installation mechanism, and exhaust pipe, achieves the advantage of improving the treatment effect of industrial boiler exhaust gas treatment device. It enables thorough treatment and effective filtration of industrial boiler exhaust gas, preventing pollution of the surrounding air and improving the treatment efficiency of the industrial boiler exhaust gas treatment device.

[0003] In practical use, it has been found that while dust removal boxes and dust filters can effectively filter dust from flue gas, the filtered dust tends to adhere to the dust filters, leading to clogging and difficult cleaning. Furthermore, dust not only adheres to the dust filters but also to the inner walls of the box, making it difficult to automatically clean the dust filters and the inner walls of the box. Therefore, we propose an industrial boiler with flue gas dust removal function to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an industrial boiler with flue gas dust removal function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An industrial boiler with flue gas dust removal function includes a furnace body and a flue gas dust removal box. The flue gas dust removal box is fixedly installed on one side of the furnace body. A flue gas inlet pipe connected to the furnace body is provided on one side of the flue gas dust removal box, and a flue gas outlet pipe is installed on one side of the flue gas dust removal box. A dust removal screen is installed inside the flue gas dust removal box.

[0007] A control box is fixedly installed on one side of the flue gas dust collector, and a drive motor is fixedly installed on one side of the control box. The same drive shaft is rotatably installed on the inner walls of both sides of the flue gas dust collector, and the output shaft of the drive motor is fixedly connected to the drive shaft. A knocking mechanism adapted to the dust collection screen is provided on the drive shaft.

[0008] The bottom inner wall of the flue gas dust collector is provided with a discharge hole. Two limiting rods are fixedly installed at the bottom of the dust collection screen. The same frame plate is slidably sleeved on the two limiting rods. A brush is installed on the outside of the frame plate, and the brush is adapted to the inner wall of the flue gas dust collector.

[0009] A reciprocating screw is rotatably installed on the bottom inner wall of the flue gas dust collector. The top end of the reciprocating screw is rotatably installed on the dust collection screen. The same drive seat is fixedly installed on the inner walls of both sides of the frame plate, and the drive seat is threaded onto the reciprocating screw. A cleaning rod is fixedly installed at one end of the reciprocating screw, and the cleaning rod is adapted to the bottom inner wall of the flue gas dust collector.

[0010] Preferably, the striking mechanism includes a guide hole, a T-shaped rod, a striking ball, and a fixing spring. The drive shaft has a guide hole, and a T-shaped rod is slidably installed in the guide hole. A striking ball is installed at one end of the T-shaped rod, and a fixing spring is installed between the striking ball and the drive shaft. The striking ball is adapted to the dust removal screen.

[0011] Preferably, a stabilizing base is fixedly installed at the bottom of the flue gas dust collector, a drive shaft is rotatably installed on the stabilizing base, a linkage mechanism is provided between the drive shaft and the reciprocating lead screw, and a transmission mechanism is provided between the drive shaft and the drive shaft.

[0012] Preferably, the linkage mechanism includes a driven bevel gear and a driving bevel gear. The driving bevel gear is fixedly mounted on the transmission shaft, and the driven bevel gear is fixedly mounted on the bottom end of the reciprocating lead screw. The driving bevel gear meshes with the driven bevel gear.

[0013] Preferably, the transmission mechanism includes a driven pulley and a driving pulley. The driving pulley is fixedly mounted on the drive shaft, and the driven pulley is rotatably mounted on the transmission shaft. The driving pulley and the driven pulley are connected by the same belt.

[0014] Preferably, the drive shaft has a movable hole, a movable seat is slidably installed in the movable hole, an annular plate is installed on the movable seat, and the drive shaft passes through the annular plate. A clamping mechanism is provided between the annular plate and the driven pulley.

[0015] Preferably, the clamping mechanism includes a crossbar and a friction block. The crossbar is fixedly installed on one side of the annular plate, and the friction block is fixedly installed on one end of the crossbar, and the friction block is adapted to the driven pulley.

[0016] Preferably, an extrusion plate is slidably installed on the bottom inner wall of the control box, and a rotating hole is provided on the extrusion plate, and the annular plate is rotatably connected to the rotating hole.

[0017] Preferably, a hydraulic cylinder is fixedly installed on one side of the control box, and the output shaft of the hydraulic cylinder extends into the control box and is fixedly connected to the extrusion plate.

[0018] Preferably, a guide groove is provided on the bottom inner wall of the control box, a guide seat is fixedly installed on the bottom of the extrusion plate, and the guide seat is slidably connected to the guide groove. An annular groove is provided on the inner wall of the rotating hole, and an annular seat is fixedly installed on the outer side of the annular plate, and the annular seat is rotatably connected to the annular groove.

[0019] The beneficial effects of this invention are:

[0020] 1. The flue gas generated by the combustion of the furnace enters the flue gas dust removal box through the flue gas inlet pipe. The flue gas passes through the dust removal screen, which can filter the dust in the flue gas. The filtered flue gas is discharged through the flue gas outlet pipe, thus achieving the purpose of flue gas dust removal.

[0021] 2. By starting the drive motor, the drive motor can drive the drive shaft to rotate, and the drive shaft can drive the T-shaped rod and the striking ball to rotate. The rotation of the striking ball can strike the dust removal screen, thereby preventing the dust removal screen from getting clogged. At this time, the drive pulley drives the driven pulley to rotate freely on the transmission shaft through the belt.

[0022] 3. When cleaning the dust in the flue gas dust collector, the hydraulic cylinder is activated. The hydraulic cylinder can drive the extrusion plate to move through the output shaft. The extrusion plate can drive the annular plate and the moving seat to move. The annular plate can drive the friction block to move through the crossbar, so that the friction block is pressed against the driven pulley, so that the rotation of the driven gear can drive the transmission shaft to rotate.

[0023] 4. When the discharge hole is opened, the drive motor drives the drive shaft and the striking ball to strike the dust collector screen, shaking off the dust. Through the cooperation of the drive pulley, driven pulley, friction block, crossbar, annular plate, and moving seat, the drive shaft drives the transmission shaft to rotate. Through the cooperation of the active bevel gear and driven bevel gear, the transmission shaft drives the reciprocating screw to rotate. The reciprocating screw drives the drive seat, frame plate, and brush to move up and down reciprocally, cleaning the dust on the inner wall of the flue gas dust collector box, allowing the dust to fall onto the bottom inner wall of the flue gas dust collector box. The rotation of the reciprocating screw drives the sweeping rod to rotate, which sweeps the dust into the discharge hole, thus achieving the purpose of cleaning the dust. Attached Figure Description

[0024] Figure 1This is a three-dimensional structural diagram of an industrial boiler with flue gas dust removal function proposed in this invention.

[0025] Figure 2 This is a schematic diagram of the main structure of an industrial boiler with flue gas dust removal function proposed in this invention.

[0026] Figure 3 This is a schematic diagram of part A of an industrial boiler with flue gas dust removal function proposed in this invention.

[0027] Figure 4 This is a schematic diagram of part B of an industrial boiler with flue gas dust removal function proposed in this invention.

[0028] Figure 5 This is a schematic diagram of part C of an industrial boiler with flue gas dust removal function proposed in this invention.

[0029] Figure 6 This is a schematic diagram of part D of an industrial boiler with flue gas dust removal function proposed in this invention.

[0030] Figure 7 This is a three-dimensional structural diagram of the drive shaft of an industrial boiler with flue gas dust removal function proposed in this invention.

[0031] In the diagram: 1. Furnace body; 2. Flue gas dust collector; 3. Inlet pipe; 4. Outlet pipe; 5. Waste discharge hole; 6. Dust collector screen; 7. Control box; 8. Drive shaft; 9. Drive motor; 10. Guide hole; 11. T-shaped rod; 12. Striking ball; 13. Fixed spring; 14. Drive pulley; 15. Belt; 16. Limiting rod; 17. Frame plate; 18. Brush; 19. Drive seat; 20. Reciprocating screw; 21. Cleaning rod; 22. Driven bevel gear; 23. Stabilizing seat; 24. Transmission shaft; 25. Driving bevel gear; 26. Driven pulley; 27. Bearing; 28. Moving hole; 29. ​​Moving seat; 30. Annular plate; 31. Crossbar; 32. Friction block; 33. Extrusion plate; 34. Rotating hole; 35. Hydraulic cylinder; 36. Material guide seat. Detailed Implementation

[0032] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] When a component is described as being "set on" another component, it can be directly on the other component or it can be in an intervening component. "Set on" indicates a mode of existence, which can be a connection, installation, fixed connection, active connection, etc. When a component is described as being "connected" to another component, it can be directly connected to the other component or it may be in an intervening component.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Reference Figure 1-7 An industrial boiler with flue gas dust removal function includes a furnace body 1 and a flue gas dust removal box 2. The flue gas dust removal box 2 is fixedly installed on one side of the furnace body 1. An inlet pipe 3 connected to the furnace body 1 is provided on one side of the flue gas dust removal box 2, and an outlet pipe 4 is installed on one side of the flue gas dust removal box 2. The flue gas generated by combustion in the furnace body 1 enters the flue gas dust removal box 2 through the inlet pipe 3. The flue gas passes through a dust removal screen 6, which filters the dust in the flue gas. The filtered flue gas is discharged through the outlet pipe 4, thus achieving the purpose of flue gas dust removal. A dust removal screen 6 is installed inside the flue gas dust removal box 2. A control box 7 is fixedly installed on one side of the flue gas dust removal box 2, and a drive motor 9 is fixedly installed on one side of the control box 7. The same drive shaft 8 is rotatably mounted on both inner walls, and the output shaft of the drive motor 9 is fixedly connected to the drive shaft 8. The drive shaft 8 is equipped with a striking mechanism adapted to the dust removal screen 6. The striking mechanism includes a guide hole 10, a T-shaped rod 11, a striking ball 12, and a fixing spring 13. The drive shaft 8 has a guide hole 10, and a T-shaped rod 11 is slidably mounted in the guide hole 10. A striking ball 12 is mounted on one end of the T-shaped rod 11. A fixing spring 13 is installed between the striking ball 12 and the drive shaft 8. The striking ball 12 is adapted to the dust removal screen 6. The drive motor 9 can drive the drive shaft 8 and the striking ball 12 to strike the dust removal screen 6, which can shake off the dust on the dust removal screen 6 and solve the problem of the dust removal screen 6 being blocked.

[0036] In this embodiment, a reciprocating screw 20 is rotatably mounted on the bottom inner wall of the flue gas dust collector 2. The top end of the reciprocating screw 20 is rotatably mounted on the dust collection screen 6. The same drive seat 19 is fixedly mounted on both inner walls of the frame plate 17, and the drive seat 19 is threaded onto the reciprocating screw 20. A cleaning rod 21 is fixedly mounted on one end of the reciprocating screw 20, and the cleaning rod 21 is adapted to the bottom inner wall of the flue gas dust collector 2. The rotation of the reciprocating screw 20 can drive the drive seat 19, the frame plate 17, and the brush 18 to move up and down reciprocally, thereby realizing the cleaning of the inner wall of the flue gas dust collector 2. For cleaning purposes, a dust removal hole 5 is provided on the bottom inner wall of the flue gas dust collector 2. A guide seat 36 is installed on the bottom inner wall of the flue gas dust collector 2. The cleaning rod 21 is adapted to the guide seat 36. Two limiting rods 16 are fixedly installed at the bottom of the dust collection screen. The same frame plate 17 is slidably sleeved on the two limiting rods 16. A brush 18 is installed on the outside of the frame plate 17, and the brush 18 is adapted to the inner wall of the flue gas dust collector 2. The rotation of the reciprocating screw 20 can drive the cleaning rod 21 to rotate. The cleaning rod 21 can sweep the dust into the dust removal hole 5, thereby achieving the purpose of cleaning the dust.

[0037] In this embodiment, a stabilizing base 23 is fixedly installed at the bottom of the flue gas dust collector 2, and a transmission shaft 24 is rotatably installed on the stabilizing base 23. A linkage mechanism is provided between the transmission shaft 24 and the reciprocating lead screw 20, and a transmission mechanism is provided between the drive shaft 8 and the transmission shaft 24. The linkage mechanism includes a driven bevel gear 22 and a driving bevel gear 25. The driving bevel gear 25 is fixedly installed on the transmission shaft 24, and the driven bevel gear 22 is fixedly installed on the bottom end of the reciprocating lead screw 20. The driving bevel gear 25 and the driven bevel gear 22 mesh with each other. By providing the driving bevel gear 25 and the driven bevel gear 22, the rotation of the transmission shaft 24 can drive the reciprocating lead screw 20 to rotate.

[0038] In this embodiment, the transmission mechanism includes a driven pulley 26 and a driving pulley 14. The driving pulley 14 is fixedly mounted on the drive shaft 8, and the driven pulley 26 is rotatably mounted on the transmission shaft 24 through a bearing 27. The driving pulley 14 and the driven pulley 26 are connected by the same belt 15. The rotation of the driving pulley 14 drives the driven pulley 26 to rotate on the transmission shaft 24 through the belt 15.

[0039] In this embodiment, a movable hole 28 is provided on the drive shaft 24, and a movable seat 29 is slidably installed in the movable hole 28. An annular plate 30 is installed on the movable seat 29, and the drive shaft 24 passes through the annular plate 30. A pressing mechanism is provided between the annular plate 30 and the driven pulley 26. The pressing mechanism includes a crossbar 31 and a friction block 32. The crossbar 31 is fixedly installed on one side of the annular plate 30, and the friction block 32 is fixedly installed on one end of the crossbar 31. The friction block 32 is adapted to the driven pulley 26. When the friction block 32 is pressed against the driven pulley 26, the rotation of the driven pulley 26 can drive the drive shaft 24 to rotate.

[0040] In this embodiment, an extrusion plate 33 is slidably installed on the bottom inner wall of the control box 7. The extrusion plate 33 has a rotating hole 34, and the annular plate 30 is rotatably connected to the rotating hole 34. A hydraulic cylinder 35 is fixedly installed on one side of the control box 7. The output shaft of the hydraulic cylinder 35 extends into the control box 7 and is fixedly connected to the extrusion plate 33. A guide groove is provided on the bottom inner wall of the control box 7. A guide seat is fixedly installed on the bottom of the extrusion plate 33, which enables the extrusion plate 33 to move stably. The guide seat is slidably connected to the guide groove. An annular groove is provided on the inner wall of the rotating hole 34. An annular seat is fixedly installed on the outer side of the annular plate 30, and the annular seat is rotatably connected to the annular groove. With the cooperation of the annular seat and the annular groove, the annular plate 30 and the extrusion plate 33 can be rotatably connected.

[0041] In this invention, the flue gas generated by combustion in the furnace body 1 enters the flue gas dust removal box 2 through the flue gas inlet pipe 3. The flue gas passes through the dust removal net 6, which can filter the dust in the flue gas. The filtered flue gas is discharged through the flue gas outlet pipe 4, thereby achieving the purpose of dust removal from the flue gas. By starting the drive motor 9, the drive motor 9 can drive the drive shaft 8 to rotate. The drive shaft 8 can drive the T-shaped rod 11 and the striking ball 12 to rotate. The rotation of the striking ball 12 can strike the dust removal net 6, thereby preventing the dust removal net 6 from becoming clogged. At this time, the drive pulley 14 drives the driven pulley 26 to rotate on the transmission shaft 24 through the belt 15.

[0042] When cleaning the dust in the flue gas dust collector 2, the hydraulic cylinder 35 is activated. The hydraulic cylinder 35 drives the extrusion plate 33 to move via the output shaft. The extrusion plate 33 drives the annular plate 30 and the moving seat 29 to move. The annular plate 30 drives the friction block 32 to move via the crossbar 31, so that the friction block 32 is pressed against the driven pulley 26. This achieves the purpose of the driven gear rotating to drive the transmission shaft 24 to rotate. When the discharge hole 5 is opened, the drive motor 9 drives the drive shaft 8 and the striking ball 12 to strike the dust collector screen 6, which can shake off the dust on the dust collector screen 6. This is achieved through the drive pulley 14, the driven pulley 26, and the friction... With the cooperation of block 32, crossbar 31, annular plate 30 and movable seat 29, drive shaft 8 can drive transmission shaft 24 to rotate. With the cooperation of active bevel gear 25 and driven bevel gear 22, transmission shaft 24 can drive reciprocating screw 20 to rotate. Reciprocating screw 20 can drive drive seat 19, frame plate 17 and brush 18 to move up and down reciprocally, which can clean the dust on the inner wall of flue gas dust collector 2, so that the dust can fall onto the bottom inner wall of flue gas dust collector 2. The rotation of reciprocating screw 20 can drive sweeping rod 21 to rotate, and sweeping rod 21 can sweep dust into discharge hole 5, thereby achieving the purpose of cleaning dust.

[0043] The above provides a detailed description of an industrial boiler with flue gas dust removal function provided by the present invention. Specific embodiments have been used to illustrate the principles and implementation methods of the present invention. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An industrial boiler with flue gas dust removal function, characterized in that, It includes a furnace body (1) and a flue gas dust collector (2). The flue gas dust collector (2) is fixedly installed on one side of the furnace body (1). A flue gas inlet pipe (3) connected to the furnace body (1) is provided on one side of the flue gas dust collector (2). A flue gas outlet pipe (4) is installed on one side of the flue gas dust collector (2). A dust collector screen (6) is installed inside the flue gas dust collector (2). A control box (7) is fixedly installed on one side of the flue gas dust collector (2), and a drive motor (9) is fixedly installed on one side of the control box (7). The same drive shaft (8) is rotatably installed on the inner walls of both sides of the flue gas dust collector (2), and the output shaft of the drive motor (9) is fixedly connected to the drive shaft (8). A knocking mechanism adapted to the dust collection screen (6) is provided on the drive shaft (8). The bottom inner wall of the flue gas dust collector (2) is provided with a discharge hole (5), and two limiting rods (16) are fixedly installed at the bottom of the dust collector (6). The same frame plate (17) is slidably sleeved on the two limiting rods (16). A brush (18) is installed on the outside of the frame plate (17), and the brush (18) is adapted to the inner wall of the flue gas dust collector (2). A reciprocating screw (20) is rotatably installed on the bottom inner wall of the flue gas dust collector (2). The top end of the reciprocating screw (20) is rotatably installed on the dust collection screen (6). The same drive seat (19) is fixedly installed on the inner walls of both sides of the frame plate (17), and the drive seat (19) is threaded onto the reciprocating screw (20). A cleaning rod (21) is fixedly installed at one end of the reciprocating screw (20), and the cleaning rod (21) is adapted to the bottom inner wall of the flue gas dust collector (2).

2. An industrial boiler with flue gas dust removal function according to claim 1, characterized in that, The striking mechanism includes a guide hole (10), a T-shaped rod (11), a striking ball (12), and a fixing spring (13). The drive shaft (8) has a guide hole (10). The T-shaped rod (11) is slidably installed in the guide hole (10). The striking ball (12) is installed at one end of the T-shaped rod (11). The fixing spring (13) is installed between the striking ball (12) and the drive shaft (8). The striking ball (12) is adapted to the dust removal screen (6).

3. An industrial boiler with flue gas dust removal function according to claim 1, characterized in that, A stabilizing seat (23) is fixedly installed at the bottom of the flue gas dust removal box (2), and a drive shaft (24) is rotatably installed on the stabilizing seat (23). A linkage mechanism is provided between the drive shaft (24) and the reciprocating lead screw (20), and a transmission mechanism is provided between the drive shaft (8) and the drive shaft (24).

4. An industrial boiler with flue gas dust removal function according to claim 3, characterized in that, The linkage mechanism includes a driven bevel gear (22) and a driving bevel gear (25). The driving bevel gear (25) is fixedly mounted on the transmission shaft (24), and the driven bevel gear (22) is fixedly mounted on the bottom end of the reciprocating screw (20). The driving bevel gear (25) meshes with the driven bevel gear (22).

5. An industrial boiler with flue gas dust removal function according to claim 3, characterized in that, The transmission mechanism includes a driven pulley (26) and a drive pulley (14). The drive pulley (14) is fixedly mounted on the drive shaft (8), and the driven pulley (26) is rotatably mounted on the transmission shaft (24). The drive pulley (14) and the driven pulley (26) are connected by the same belt (15).

6. An industrial boiler with flue gas dust removal function according to claim 5, characterized in that, The drive shaft (24) has a movable hole (28), a movable seat (29) is slidably installed in the movable hole (28), an annular plate (30) is installed on the movable seat (29), and the drive shaft (24) passes through the annular plate (30). A clamping mechanism is provided between the annular plate (30) and the driven pulley (26).

7. An industrial boiler with flue gas dust removal function according to claim 5, characterized in that, The clamping mechanism includes a crossbar (31) and a friction block (32). The crossbar (31) is fixedly installed on one side of the annular plate (30), and the friction block (32) is fixedly installed on one end of the crossbar (31). The friction block (32) is adapted to the driven pulley (26).

8. An industrial boiler with flue gas dust removal function according to claim 1, characterized in that, An extrusion plate (33) is slidably installed on the bottom inner wall of the control box (7). A rotation hole (34) is provided on the extrusion plate (33), and the annular plate (30) is rotatably connected to the rotation hole (34).

9. An industrial boiler with flue gas dust removal function according to claim 8, characterized in that, A hydraulic cylinder (35) is fixedly installed on one side of the control box (7), and the output shaft of the hydraulic cylinder (35) extends into the control box (7) and is fixedly connected to the extrusion plate (33).

10. An industrial boiler with flue gas dust removal function according to claim 8, characterized in that, The control box (7) has a guide groove on its bottom inner wall. The bottom of the extrusion plate (33) is fixedly installed with a guide seat, and the guide seat is slidably connected to the guide groove. The inner wall of the rotating hole (34) has an annular groove. The outer side of the annular plate (30) is fixedly installed with an annular seat, and the annular seat is rotatably connected to the annular groove.

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