Intelligent material distribution device for material receiving tank of blast furnace

Abstract

The invention relates to the technical field of blast furnace material distribution equipment, and discloses a blast furnace material receiving tank intelligent material distribution device which comprises a supporting frame, the top of the supporting frame is rotationally connected with a feeding pipe, the top of the supporting frame is fixedly connected with a driving motor, and when a chute tilts upwards with a rotating column as the center, due to the fact that a limiting assembly is in a relatively static state, the chute tilts upwards; the cylinder is limited by the through hole groove, at the moment, the sliding rod slides in the direction of a limiting rod along the inner wall of the chute, the sliding rod drives a sliding block to move in the same direction through a sliding rail, and an arc-shaped plate and a rotating plate generate circumferential rotation with a torsional spring as the center; the sliding block slides outwards along the inner wall of the sliding rail along an H path, the upward tilting angle of the chute is larger, the downward rotating angle of the rotating plate is larger, and finally the sliding block is attached to the inner wall of the containing groove, so that when the upward tilting angle of the chute is larger, the sputtering range of iron ore is reduced, the ore quantity difference between the edge of the tank body and the center of the tank body is reduced, and the material distribution accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blast furnace material distribution equipment, in particular to an intelligent material distribution device for a blast furnace receiving tank. BACKGROUND

[0002] The blast furnace feeding trolley is a mechanized feeding device running along an inclined track. The raw materials are lifted from the ground bunker to the top of the blast furnace by a winch or a hydraulic drive system, and then poured into the feeding chute. The bottom chute is driven by a numerical control motor to rotate at different angles, so that the iron ore can be evenly distributed in the blast furnace to complete the basic material distribution process. When the iron ore passes through the bottom chute, the iron ore is affected by the chute, which not only slows down the falling speed, but also spreads to a larger range. A protruding block is arranged inside the chute. When the iron ore passes through the protruding block, the iron ore is blocked and a spraying process is generated. The above method can ensure that the iron ore is evenly distributed on the inner wall of the blast furnace tank when the inclination angle of the chute is not large. However, when the inclination angle is too large, the dispersion angle of the iron ore does not change, which makes part of the iron ore reach the edge of the tank body in advance, and finally the iron ore distributed on the edge of the tank body is more than that on the remaining positions. To solve the above problems, the following scheme is proposed. SUMMARY

[0003] To solve the above technical problems, the present application provides an intelligent material distribution device for a blast furnace receiving tank, which comprises a support frame, a feeding pipe rotatably connected to the top of the support frame, a drive motor fixedly connected to the top of the support frame, a gear fixedly connected to the output end of the drive motor, an output pipe rotatably connected to the inner wall of the support frame, a gear ring fixedly connected to the outer wall of the output pipe, and a numerical control motor fixedly connected to the outer wall of the output pipe. The moving mechanism is rotatably connected to the inner wall of the output pipe and is used to receive the iron ore falling from the feeding pipe. The linkage mechanism is fixedly connected to the outer wall of the moving mechanism and is used to change the state of the moving mechanism when the angle of the moving mechanism changes.

[0004] Preferably, the moving mechanism comprises: The receiving assembly is rotatably connected to the inner wall of the output pipe. The contact assembly is rotatably connected to the outer wall of the receiving assembly.

[0005] Preferably, the linkage mechanism comprises: The sliding assembly is slidably connected to the outer wall of the receiving assembly. The limiting assembly is fixedly connected to the inner wall of the output pipe.

[0006] Preferably, the receiving component includes two rotating columns rotatably connected to the inner wall of the output pipe, and a chute is fixedly connected to the inner wall of the two rotating columns; As the iron ore falls downward through the feed pipe, it eventually slides down the outer wall of the chute and enters the inner wall of the blast furnace.

[0007] Preferably, the receiving component also includes a connector fixedly connected to the outer wall of the output pipe, an arc-shaped groove is provided on the inner wall of the chute, and a receiving groove is provided on the inner wall of the chute. The drive motor drives the gear ring and the output pipe to rotate through the gear, which in turn drives the chute to rotate, so that the iron ore is evenly distributed on the inner wall of the blast furnace. The CNC motor drives the rotating column to rotate through the connecting parts, thereby controlling the degree of up and down tilting of the chute.

[0008] Preferably, the contact assembly includes a plurality of rotating plates rotatably connected to the inner wall of the chute, and an arc-shaped plate is fixedly connected to the side wall of the plurality of rotating plates; Driven by the linkage mechanism, the rotating plate will rotate around the connection point.

[0009] Preferably, the contact assembly further includes a slider rotatably connected to the end of the arc-shaped plate away from the rotating plate, and a torsion spring is fixedly connected to the connection position of the rotating plate; When the rotating plate rotates downwards, the torsion spring will be compressed and deformed, accumulating potential energy.

[0010] Preferably, the sliding assembly includes a slide rod slidably connected to the side wall of the chute, a slide rail fixedly connected to the side wall of the slide rod, and a cylinder rotatably connected to the side wall of the slide rod. When the chute rotates up and down, the limiting component restricts the cylinder from sliding and forces the slide rod to drive the slide rail to slide along the inner wall of the chute.

[0011] Preferably, the limiting component includes a fixing block fixedly connected to the inner wall of the output tube, a limiting rod fixedly connected to the bottom of the fixing block, and a through-hole groove provided on the side wall of the limiting rod; When the chute rotates, the through-hole groove restricts the movement of the cylinder, causing the cylinder to slide up and down along the inner wall of the through-hole groove.

[0012] Preferably, the outer wall of the arc plate is slidably connected to the inner wall of the arc groove, and the outer wall of the slider is slidably connected to the inner wall of the slide rail. When the slide bar drives the slide rail to slide, the slide rail will drive the arc plate to slide along the inner wall of the arc groove through the slider, and force the rotating plate to fit against the inner wall of the receiving groove.

[0013] The present invention has the following beneficial effects: (1) This invention addresses the phenomenon of accumulation at the edge of the blast furnace inner wall caused by the tilting angle of the chute. The device includes a linkage mechanism and a moving mechanism. When the chute tilts upwards around the rotating column, the limiting components are in a relatively stationary state. The through-hole groove restricts the synchronous rotation of the sliding rod, causing the chute to... Figure 7 The state changes to Figure 6 In this state, due to the constraint of the through-hole groove on the cylinder, the slide bar will slide along the inner wall of the chute towards the limiting rod. The slide bar drives the slider to move in the same direction via the slide rail, such as... Figure 7 The slide moves along path G, while the arc plate and rotating plate rotate in a circle around the torsion spring. While the slide rail drives the slider to move along path G, the slider will slide outward along the inner wall of the slide rail along path H. In addition, the iron ore falling from top to bottom will generate a downward rotation pressure on the rotating plate. Through the application of the above components, as the upward angle of the chute increases, the downward rotation angle of the rotating plate increases, and finally it fits against the inner wall of the receiving tank. This reduces the splashing range of iron ore when the upward angle of the chute increases, reduces the difference in the amount of ore between the edge of the tank and the center of the tank, and improves the accuracy of material distribution. (2) The present invention utilizes the characteristic that the rotating plate changes with the angle of the chute. After the device completes a single feeding, the CNC motor will drive the rotating plate to be in the protruding position again. When the chute is raised again, the rotating plate will be attached to the inner wall of the receiving trough. Through the application of the above components, the iron ore is effectively prevented from accumulating in the gaps in the conventional fixed design of the chute, which leads to a decrease in the resistance inside the chute and cannot effectively reduce the falling speed of the iron ore and the dispersion efficiency of the iron ore. (3) This invention utilizes the characteristic of the ore being squeezed from top to bottom onto the top of the rotating plate, such as... Figure 8 As shown, when the top of the rotating plate is pressed, the rotating plate will force the arc plate to slide down along the inner wall of the arc groove with the torsion spring as the center. The arc plate will then force the slider to slide down along the inner wall of the slide rail. In addition, the slide rod drives the slide rail to slide. Through the application of the above components, the resistance encountered by the rotating plate and the slider when sliding is effectively reduced, and the phenomenon of excessive friction in the internal components during operation is prevented.

[0014] (4) When the rotating plate is pressed and rotates downward, the torsion spring will accumulate potential energy. When the chute rotates from top to bottom, since the iron ore supply has stopped, the torsion spring will release potential energy and force the rotating plate and the arc plate to tilt upward around the torsion spring. Through the application of the above components, when the equipment needs to be reset, the internal multiple torsion springs can drive the slider to reset quickly, adapting to the rapid feeding process. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a cross-sectional schematic diagram of the moving mechanism of the present invention; Figure 4 This is a cross-sectional schematic diagram of the receiving component of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a cross-sectional schematic diagram showing the limiting component's working state according to the present invention; Figure 7 This is a cross-sectional schematic diagram of the sliding component of the present invention; Figure 8 This is a schematic diagram of the contact component of the present invention; Figure 9 This is a cross-sectional schematic diagram of the limiting component of the present invention.

[0017] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Moving mechanism; 11. Receiving component; 12. Contact component; 13. Support frame; 14. Feed pipe; 15. Drive motor; 16. Gear; 17. Output pipe; 18. Gear ring; 19. CNC motor; 111. Rotating column; 112. Chute; 113. Connector; 114. Arc groove; 115. Receiving groove; 121. Rotating plate; 122. Arc plate; 123. Slider; 124. Torsion spring; 2. Linkage mechanism; 21. Sliding component; 22. Limiting component; 211. Slide rod; 212. Slide rail; 213. Cylinder; 221. Fixing block; 222. Limiting rod; 223. Through hole groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1, please refer to Figure 1 -Figure 7 This invention relates to an intelligent charging device for a blast furnace receiving tank, comprising a support frame 13, a feed pipe 14 rotatably connected to the top of the support frame 13, a drive motor 15 fixedly connected to the top of the support frame 13, a gear 16 fixedly connected to the output end of the drive motor 15, an output pipe 17 rotatably connected to the inner wall of the support frame 13, a gear ring 18 fixedly connected to the outer wall of the output pipe 17, and a CNC motor 19 fixedly connected to the outer wall of the output pipe 17. The device also includes: The moving mechanism 1 is rotatably connected to the inner wall of the output pipe 17 and is used to receive iron ore falling from the feed pipe 14. Linkage mechanism 2 is fixedly connected to the outer wall of the moving mechanism 1 and is used to change the state of the moving mechanism 1 when the moving mechanism 1 undergoes an angle change.

[0020] Mobile mechanism 1 includes: The receiving component 11 is rotatably connected to the inner wall of the output tube 17; Contact component 12 is rotatably connected to the outer wall of receiving component 11.

[0021] Linkage mechanism 2 includes: Sliding component 21 is slidably connected to the outer wall of receiving component 11; Limiting component 22 is fixedly connected to the inner wall of the output tube 17.

[0022] Example 2, please refer to Figure 4 - Figure 9 The present invention is an intelligent charging device for a blast furnace receiving tank. Based on Example 1, the receiving component 11 includes two rotating columns 111 rotatably connected to the inner wall of the output pipe 17, and a chute 112 is fixedly connected to the inner wall of the two rotating columns 111. Before use, the support frame 13 is fixed in the required position. After ensuring that the drive motor 15 drives the gear ring 18 and the output pipe 17 to rotate through the gear 16, so that the output pipe 17 drives the chute 112 to rotate; and the CNC motor 19 drives the rotating column 111 to rotate through the connector 113, thereby controlling the up and down tilting of the chute 112, the process is put into use.

[0023] The receiving component 11 also includes a connector 113 fixedly connected to the outer wall of the output pipe 17, an arc-shaped groove 114 is provided on the inner wall of the chute 112, and a receiving groove 115 is provided on the inner wall of the chute 112. The iron ore falling from top to bottom will generate a downward rotation pressure on the rotating plate 121. Through the application of the above components, as the upward angle of the chute 112 increases, the downward rotation angle of the rotating plate 121 also increases, eventually fitting against the inner wall of the receiving tank 115. This reduces the splashing range of the iron ore when the upward angle of the chute 112 increases, reduces the difference in the amount of ore between the edge of the tank and the center of the tank, and improves the accuracy of the material distribution.

[0024] The contact assembly 12 includes a plurality of rotating plates 121 rotatably connected to the inner wall of the chute 112, and an arc-shaped plate 122 is fixedly connected to the side wall of the plurality of rotating plates 121. Utilizing the characteristic that the rotating plate 121 changes its angle as the chute 112 tilts upwards, after the device completes a single feeding cycle, the CNC motor 19 will drive the rotating plate 121 to tilt upwards again. When the chute 112 tilts upwards again, the rotating plate 121 will adhere to the inner wall of the receiving trough 115. Through the application of the above components, the iron ore is effectively prevented from accumulating in the gaps in the conventional fixed design of the chute, which would reduce the resistance inside the chute 112 and fail to effectively reduce the falling speed of the iron ore and the dispersion efficiency of the iron ore.

[0025] The contact assembly 12 also includes a slider 123 rotatably connected to the end of the arc plate 122 away from the rotating plate 121, and a torsion spring 124 is fixedly connected to the connection position of the rotating plate 121. When the rotating plate 121 rotates downward, the torsion spring 124 will be compressed and deformed, accumulating potential energy.

[0026] The sliding assembly 21 includes a slide rod 211 slidably connected to the side wall of the chute 112, a slide rail 212 fixedly connected to the side wall of the slide rod 211, and a cylinder 213 rotatably connected to the side wall of the slide rod 211. Among them, the characteristic of the above-mentioned ore being squeezed from top to bottom against the top of the rotating plate 121 is utilized, such as Figure 8 As shown, when the top of the rotating plate 121 is pressed, the rotating plate 121 will force the arc plate 122 to slide down along the inner wall of the arc groove 114 with the torsion spring 124 as the center. The arc plate 122 will then force the slider 123 to slide down along the inner wall of the slide rail 212. In addition, the slide rod 211 drives the slide rail 212 to slide. Through the application of the above components, the resistance encountered by the rotating plate 121 and the slider 123 when sliding is effectively reduced, and the phenomenon of excessive friction of the internal components during operation is prevented.

[0027] The limiting component 22 includes a fixing block 221 fixedly connected to the inner wall of the output tube 17. A limiting rod 222 is fixedly connected to the bottom of the fixing block 221. A through hole groove 223 is provided on the side wall of the limiting rod 222. To address the issue of accumulation at the edge of the blast furnace inner wall caused by the upward tilting angle of the chute 112, a linkage mechanism 2 and a moving mechanism 1 are installed inside the equipment. When the chute 112 tilts upward around the rotating column 111, the limiting component 22 is in a relatively stationary state. The through-hole groove 223 restricts the synchronous rotation of the sliding rod 211, allowing the chute 112 to... Figure 7 The state changes to Figure 6 In this state, because the cylinder 213 is restricted by the through-hole groove 223, the slide rod 211 will slide along the inner wall of the chute 112 towards the limiting rod 222. The slide rod 211 drives the slider 123 to move in the same direction through the slide rail 212, such as... Figure 7 The slide rail 212 moves along the path G, while the arc plate 122 and the rotating plate 121 rotate in a circle around the torsion spring 124. While the slide rail 212 drives the slider 123 to move along the path G, the slider 123 will slide outward along the inner wall of the slide rail 212 along the path H.

[0028] The outer wall of the arc plate 122 is slidably connected to the inner wall of the arc groove 114, and the outer wall of the slider 123 is slidably connected to the inner wall of the slide rail 212. When the rotating plate 121 is pressed and rotates downward, the torsion spring 124 will accumulate potential energy. When the chute 112 rotates from top to bottom, since the iron ore supply has stopped, the torsion spring 124 will release potential energy and force the rotating plate 121 and the arc plate 122 to tilt upward with the torsion spring 124 as the center. Through the application of the above components, when the equipment needs to be reset, the multiple torsion springs 124 inside can drive the slider 123 to quickly reset, which is suitable for the rapid feeding process.

[0029] One specific application of this embodiment is as follows: Before use, the support frame 13 is fixed in the required position. After ensuring that the drive motor 15 drives the gear ring 18 and the output pipe 17 to rotate through the gear 16, so that the output pipe 17 drives the chute 112 to rotate; the CNC motor 19 drives the rotating column 111 to rotate through the connector 113, thereby controlling the up and down tilting of the chute 112, the process is put into use. To address the issue of accumulation at the edge of the blast furnace inner wall caused by the upward tilt of the chute 112, a linkage mechanism 2 and a moving mechanism 1 are installed inside the equipment. When the chute 112 tilts upward around the rotating column 111, the limiting component 22 is in a relatively stationary state. The through-hole groove 223 restricts the synchronous rotation of the sliding rod 211, allowing the chute 112 to... Figure 7 The state changes to Figure 6 In this state, because the cylinder 213 is restricted by the through-hole groove 223, the slide rod 211 will slide along the inner wall of the chute 112 towards the limiting rod 222. The slide rod 211 drives the slider 123 to move in the same direction through the slide rail 212, such as... Figure 7The slide rail 212 moves along the path G, while the arc plate 122 and the rotating plate 121 rotate in a circle around the torsion spring 124. While the slide rail 212 drives the slider 123 to move along the path G, the slider 123 will slide outward along the inner wall of the slide rail 212 along the path H. In addition, the iron ore falling from top to bottom will generate a downward rotating pressure on the rotating plate 121. Through the application of the above components, as the upward angle of the chute 112 increases, the downward rotation angle of the rotating plate 121 increases, and finally it fits against the inner wall of the receiving tank 115. This reduces the splashing range of iron ore when the upward angle of the chute 112 increases, reduces the difference in the amount of ore between the edge of the tank and the center of the tank, and improves the accuracy of material distribution. By utilizing the characteristic that the angle of the rotating plate 121 changes as the chute 112 tilts upwards, after the device completes a single feeding cycle, the CNC motor 19 will drive the rotating plate 121 to tilt upwards again. When the chute 112 tilts upwards again, the rotating plate 121 will adhere to the inner wall of the receiving trough 115. Through the application of the above components, the iron ore is effectively prevented from accumulating in the gaps in the conventional fixed design of the chute, which would reduce the resistance inside the chute 112 and fail to effectively reduce the falling speed of the iron ore and the dispersion efficiency of the iron ore. Utilizing the characteristic of the ore being squeezed from top to bottom against the top of the rotating plate 121, such as Figure 8 As shown, when the top of the rotating plate 121 is pressed, the rotating plate 121 will force the arc plate 122 to slide down along the inner wall of the arc groove 114 with the torsion spring 124 as the center. The arc plate 122 will then force the slider 123 to slide down along the inner wall of the slide rail 212. In addition, the slide rod 211 drives the slide rail 212 to slide. Through the application of the above components, the resistance encountered by the rotating plate 121 and the slider 123 when sliding is effectively reduced, and the phenomenon of excessive friction of the internal components during operation is prevented.

[0030] When the rotating plate 121 is pressed and rotates downward, the torsion spring 124 will accumulate potential energy. When the chute 112 rotates from top to bottom, since the iron ore supply has stopped, the torsion spring 124 will release potential energy and force the rotating plate 121 and the arc plate 122 to tilt upward with the torsion spring 124 as the center. Through the application of the above components, when the equipment needs to be reset, the multiple torsion springs 124 inside can drive the slider 123 to quickly reset, which is suitable for the rapid feeding process.

[0031] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A smart charging device for a blast furnace receiving tank, comprising a support frame (13), a feed pipe (14) rotatably connected to the top of the support frame (13), a drive motor (15) fixedly connected to the top of the support frame (13), a gear (16) fixedly connected to the output end of the drive motor (15), an output pipe (17) rotatably connected to the inner wall of the support frame (13), a gear ring (18) fixedly connected to the outer wall of the output pipe (17), and a CNC motor (19) fixedly connected to the outer wall of the output pipe (17), characterized in that, Also includes: The moving mechanism (1) is rotatably connected to the inner wall of the output pipe (17) and is used to receive iron ore falling from the feed pipe (14); Linkage mechanism (2) is fixedly connected to the outer wall of the moving mechanism (1) and is used to change the state of the moving mechanism (1) when the moving mechanism (1) undergoes an angle change.

2. The intelligent charging device for a blast furnace receiving pot according to claim 1, characterized in that: The moving mechanism (1) includes: A receiving component (11) is rotatably connected to the inner wall of the output pipe (17); Contact component (12), which is rotatably connected to the outer wall of receiving component (11).

3. The intelligent charging device for a blast furnace receiving pot according to claim 2, characterized in that: The linkage mechanism (2) includes: A sliding component (21) is slidably connected to the outer wall of the receiving component (11); A limiting component (22) is fixedly connected to the inner wall of the output tube (17).

4. The intelligent charging device for a blast furnace receiving pot according to claim 3, characterized in that: The receiving component (11) includes two rotating columns (111) rotatably connected to the inner wall of the output pipe (17), and a chute (112) is fixedly connected to the inner wall of the two rotating columns (111). When the external iron ore falls down through the feed pipe (14), the iron ore eventually slides down along the outer wall of the chute (112) and eventually enters the inner wall of the blast furnace.

5. The intelligent charging device for a blast furnace receiving pot according to claim 4, characterized in that: The receiving component (11) also includes a connector (113) fixedly connected to the outer wall of the output pipe (17), an arc groove (114) is provided on the inner wall of the chute (112), and a receiving groove (115) is provided on the inner wall of the chute (112). Among them, the drive motor (15) drives the gear ring (18) and the output pipe (17) to rotate through the gear (16), so that the output pipe (17) drives the chute (112) to rotate, and distributes the iron ore evenly on the inner wall of the blast furnace. The CNC motor (19) drives the rotating column (111) to rotate through the connector (113), thereby controlling the up and down tilting of the chute (112).

6. The intelligent charging device for a blast furnace receiving pot according to claim 4, characterized in that: The contact assembly (12) includes a plurality of rotating plates (121) rotatably connected to the inner wall of the chute (112), and an arc-shaped plate (122) is fixedly connected to the side wall of the plurality of rotating plates (121). Under the drive of the linkage mechanism (2), the rotating plate (121) will rotate around the connection point.

7. The intelligent charging device for a blast furnace receiving pot according to claim 6, characterized in that: The contact assembly (12) further includes a slider (123) rotatably connected to the end of the arc plate (122) away from the rotating plate (121), and a torsion spring (124) is fixedly connected to the connection position of the rotating plate (121). When the rotating plate (121) rotates downward, the torsion spring (124) will be compressed and deformed, and accumulate potential energy.

8. The intelligent charging device for a blast furnace receiving pot according to claim 7, characterized in that: The sliding assembly (21) includes a slide rod (211) slidably connected to the side wall of the chute (112), a slide rail (212) fixedly connected to the side wall of the slide rod (211), and a cylinder (213) rotatably connected to the side wall of the slide rod (211). When the chute (112) rotates up and down, the limiting component (22) will restrict the cylinder (213) from sliding and force the slide rod (211) to drive the slide rail (212) to slide along the inner wall of the chute (112).

9. The intelligent charging device for a blast furnace receiving pot according to claim 8, characterized in that: The limiting component (22) includes a fixing block (221) fixedly connected to the inner wall of the output tube (17), a limiting rod (222) fixedly connected to the bottom of the fixing block (221), and a through hole groove (223) opened on the side wall of the limiting rod (222). When the chute (112) rotates, the through-hole groove (223) restricts the movement of the cylinder (213), causing the cylinder (213) to slide up and down along the inner wall of the through-hole groove (223).

10. The intelligent charging device for a blast furnace receiving pot according to claim 9, characterized in that: The outer wall of the arc plate (122) is slidably connected to the inner wall of the arc groove (114), and the outer wall of the slider (123) is slidably connected to the inner wall of the slide rail (212). When the slide bar (211) drives the slide rail (212) to slide, the slide rail (212) will drive the arc plate (122) to slide along the inner wall of the arc groove (114) through the slider (123), and force the rotating plate (121) to fit against the inner wall of the receiving groove (115).

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