Quality detection tool for aluminum alloy conductive cross arm of electric arc furnace

Abstract

The utility model discloses a quality detection tool for an aluminum alloy conductive cross arm of an electric arc furnace, and mainly relates to a quality detection tool for an electric cross arm. Comprising an adjusting device, the adjusting device comprises a fixing plate, the fixing plate is fixedly connected with a frame, the end, away from the side face of the frame, of the fixing plate is fixedly connected with a connecting plate, the side, away from the fixing plate, of the connecting plate is fixedly connected with a motor, and the output end of the motor is fixedly connected with a rotating rod; a lifting plate penetrates through the arc face of the rotating rod in a threaded mode, and the end, away from the motor, of the arc face of the rotating rod is rotationally connected with an adjusting plate. The aluminum alloy conductive cross arm conveying device has the advantages that when an aluminum alloy conductive cross arm is conveyed to the conveying device, the aluminum alloy conductive cross arm can be conveyed through the adjusting device instead of manual work, so that the speed of conveying the aluminum alloy conductive cross arm can be increased through the adjusting device, the working intensity of workers is reduced, and the working efficiency is improved. And the safety risk when a worker carries the aluminum alloy conductive cross arm can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric cross arm quality detection tools, in particular to an arc furnace aluminum alloy conductive cross arm quality detection tool. Background Art

[0002] The electric cross arm quality inspection tool is a tool that can flip the electric cross arm by clamping, so that personnel can inspect the quality of the surface of the electric cross arm by flipping the electric cross arm.

[0003] Prior art includes a utility model with announcement number CN211402607U, which discloses a conductive cross arm with arc detection function, including a conductive cross arm body and a graphite electrode, a conductive chuck is installed at one end of the conductive cross arm body, and the graphite electrode is clamped in the conductive chuck, a screw is installed on the lower side of the conductive cross arm body, and a high-temperature resistant shielded copper cable is wound on the screw, one end of the high-temperature resistant shielded copper cable is led out through a front voltage collector column arranged at the front end of the conductive cross arm body, and the other end is led out through a rear voltage collector column arranged at the rear end of the conductive cross arm body, a sleeve is threadedly connected to the screw, and the rear voltage collector column is fixedly installed on the lower side of the sleeve, and an electrode voltage collector column is arranged on the upper part of the conductive chuck for each phase. The conductive cross arm with arc detection function of the utility model can adjust the horizontal use distance of the voltage transformer through the screw to meet the arc detection processing at different positions, so that the electrode arc voltage detection position is closer to the arc.

[0004] The inventor discovered in daily use that in the process of placing the aluminum alloy conductive cross arm on the surface of the transportation device on the detection tool, due to the high height of the frame of the detection tool, the speed of manually carrying the aluminum alloy conductive cross arm to place it on the transportation device of the detection tool is slow, and manual multiple carrying of the aluminum alloy conductive cross arm may cause workers' limbs fatigue, affecting work performance. If the hands slip during the process of carrying the aluminum alloy conductive cross arm, safety risks may also occur. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art that, in the process of placing the aluminum alloy conductive cross arm on the surface of the transportation device of the detection tool, it is found that due to the high height of the frame of the detection tool, the speed of manually carrying the aluminum alloy conductive cross arm and placing it on the transportation device of the detection tool is slow, and when the aluminum alloy conductive cross arm is carried manually for many times, it will also cause limb fatigue of the workers, affecting the work efficiency. When the hands slip in the process of carrying the aluminum alloy conductive cross arm, safety risks will occur. A quality detection tool for aluminum alloy conductive cross arms of electric arc furnaces is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it comprises a frame, two flipping devices are installed on the upper surface of the frame, the output ends of the two flipping devices are fixedly connected to the same base plate, the side of the flipping device close to the base plate is fixedly connected to a clamping device, the output ends of the two clamping devices are fixedly connected to the same movable plate, a transport device is installed on the inner wall of the frame, an adjusting device is provided on the side of the frame close to the flipping device, the adjusting device comprises a fixed plate, the fixed plate is fixedly connected to the frame, one end of the fixed plate away from the side of the frame is fixedly connected to a connecting plate, the side of the connecting plate away from the fixed plate is fixedly connected to a motor, the output end of the motor is fixedly connected to a rotating rod, the arc surface of the rotating rod is threadedly penetrated by a lifting plate, the end of the arc surface of the rotating rod away from the motor is rotatably connected to the adjusting plate, the end of the rotating rod away from the motor is rotatably connected to the adjusting plate, the inner wall of the adjusting plate slides through the limiting rod, the limiting rod slides through the lifting plate, and the end of the limiting rod away from the adjusting plate is fixedly connected to the fixed plate.

[0007] The effects achieved by the above components are as follows: the conductive cross arm of the electric arc furnace is a component used to transmit electrical energy and support electrodes in the electric arc furnace. These cross arms are usually made of high-strength aluminum alloy, so the conductive cross arms can also be called aluminum alloy conductive cross arms. When it is necessary to conduct quality inspection on the aluminum alloy conductive cross arms, suitable measuring tools, such as calipers or three-dimensional coordinate measuring machines, are usually used to measure the key dimensions and geometric shapes of the aluminum alloy conductive cross arms, and check whether the surface of the aluminum alloy conductive cross arms is flat, without obvious cracks, slag or pores. The aluminum alloy conductive cross arms are placed on the transport device by manual handling, and the aluminum alloy conductive cross arms can be pushed toward the bottom plate by the transport device. After the aluminum alloy conductive cross arms are pushed onto the bottom plate through the transport device, the clamping device can be started, and the movement of the clamping device will drive the moving plate to move in the direction of the aluminum alloy conductive cross arms, thereby being able to The aluminum alloy conductive cross arm is clamped under the action of the bottom plate and the movable plate, and the flipping device can be started at this time. The aluminum alloy conductive cross arm can be flipped by the flipping device, so that workers can conduct quality inspection on the aluminum alloy conductive cross arm. However, in the process of placing the aluminum alloy conductive cross arm on the transport device, it is found that due to the high height of the frame, the speed of manually carrying the aluminum alloy conductive cross arm and placing it on the transport device is slow, and multiple manual handling will also cause limb fatigue of the workers, affecting work efficiency. When the hands slip during the transportation of the aluminum alloy conductive cross arm, safety risks will also occur. At this time, the adjustment device can be used instead of manual labor to lift the aluminum alloy conductive cross arm, thereby improving the efficiency of placing the aluminum alloy conductive cross arm on the transport device, improving the speed of quality inspection of the aluminum alloy conductive cross arm, and avoiding safety hazards when carrying the aluminum alloy conductive cross arm.

[0008] Preferably, the arc surface of the motor is slidably connected to a protective shell, one end of the arc surface of the protective shell is fixedly connected to a threaded block, the internal thread of the threaded block is penetrated by a screw, and the screw is threadedly connected to the connecting plate.

[0009] The effect achieved by the above components is: the cost of the motor is high, and the motor will not be able to continue working when it is damaged. At this time, the protective shell can be installed on the surface of the motor through a screw, so that the surface of the motor can be protected by the protective shell, thereby increasing the service life of the motor.

[0010] Preferably, an auxiliary plate is fixedly connected to one end of the lifting plate away from the frame, and the cross section of the auxiliary plate is arc-shaped.

[0011] The effect achieved by the above components is: when connecting the aluminum alloy conductive cross arm and the lifting plate, the auxiliary plate installed on the lifting plate can improve the connection efficiency of the aluminum alloy conductive cross arm and the lifting plate, and improve the stability of the connection between the aluminum alloy conductive cross arm and the lifting plate. Workers can use the auxiliary plate to slide the aluminum alloy conductive cross arm onto the lifting plate, thereby saving effort.

[0012] Preferably, a plurality of protrusions are fixedly connected to one side of the lifting plate close to the connecting plate, and the plurality of protrusions are evenly distributed on one side of the lifting plate.

[0013] The effect achieved by the above components is: when the aluminum alloy conductive cross arm is pushed onto the transport device through the lifting plate, the protrusion installed on the lifting plate can reduce the friction between the lifting plate and the aluminum alloy conductive cross arm, so that the aluminum alloy conductive cross arm can better move on the lifting plate toward the transport device through the protrusion.

[0014] Preferably, an auxiliary device is provided on the side of the lifting plate close to the protrusion, and the auxiliary device includes two fixed blocks, and the two fixed blocks are respectively fixedly connected to the two ends of the side of the lifting plate, and the two fixed blocks are fixedly connected to springs on the sides close to each other, and the end of the spring away from the fixed block is fixedly connected to a clamping plate, and a connecting rod is slidably penetrated through the inner wall of the spring, one end of the connecting rod is fixedly connected to the clamping plate, and the connecting rod slides through the fixed block.

[0015] The effect achieved by the above components is: when the height of the aluminum alloy conductive cross arm is raised or lowered by the adjusting device, the position of the aluminum alloy conductive cross arm on the adjusting device can be limited by the auxiliary device, thereby improving the stability of the adjusting device when raising or lowering the aluminum alloy conductive cross arm.

[0016] Preferably, a guide plate is fixedly connected to a side of the clamping plate away from the frame, and the guide plate is a titanium alloy plate.

[0017] The effect achieved by the above components is: when the aluminum alloy conductive cross arm is placed between the two clamps, it is only necessary to push the aluminum alloy conductive cross arm toward the clamp, and the guide plate installed on the clamp can move the two clamps away from each other, thereby improving the efficiency of the clamp to limit the aluminum alloy conductive cross arm through the guide plate.

[0018] Preferably, a plurality of anti-skid grooves are provided on one side of the two clamps that are close to each other, and the plurality of anti-skid grooves are evenly distributed on one side of the clamps.

[0019] The effect achieved by the above components is: when the two clamps come into contact with the aluminum alloy conductive cross arm, the anti-slip grooves on the clamps can increase the friction between the clamps and the aluminum alloy conductive cross arm, thereby improving the stability of limiting the aluminum alloy conductive cross arm by increasing the friction between the two.

[0020] In summary, the beneficial effects of the utility model are:

[0021] In the utility model, by operating the adjusting device, when the aluminum alloy conductive cross arm is carried onto the transportation device, the adjusting device can be used to replace manual work to carry the aluminum alloy conductive cross arm, so that the speed of carrying the aluminum alloy conductive cross arm can be increased by the adjusting device, the work intensity of the workers can be reduced, and the safety risks of the workers when carrying the aluminum alloy conductive cross arm can be reduced.

[0022] In the utility model, by operating the auxiliary device, when the aluminum alloy conductive cross arm is raised and lowered using the adjusting device, the two sides of the aluminum alloy conductive cross arm can be limited by the auxiliary device, so that the stability of the aluminum alloy conductive cross arm when being raised and lowered by the adjusting device can be improved by the auxiliary device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Attached Figure 2 It is a structural schematic diagram of the regulating device of the utility model;

[0025] Attached Figure 3 It is a partial structural schematic diagram of the regulating device of the utility model;

[0026] Attached Figure 4 It is a schematic diagram of the partial disassembly structure of the regulating device of the utility model;

[0027] Attached Figure 5 It is a structural schematic diagram of the auxiliary device of the utility model.

[0028] The numbers shown in the accompanying drawings are: 1. frame; 2. adjusting device; 201. fixed plate; 202. motor; 203. rotating rod; 204. adjusting plate; 205. limiting rod; 206. lifting plate; 207. connecting plate; 208. protective shell; 209. threaded block; 210. screw rod; 211. auxiliary plate; 212. protrusion; 3. auxiliary device; 31. fixed block; 32. spring; 33. connecting rod; 34. splint; 35. anti-slip groove; 36. guide plate; 4. turning device; 5. clamping device; 6. moving plate; 7. bottom plate; 8. transportation device. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0030] Reference Figure 1 - Figure 5 As shown, the utility model provides a technical solution: a quality inspection tool for aluminum alloy conductive cross arms of an electric arc furnace, comprising a frame 1, two flipping devices 4 are installed on the upper surface of the frame 1, the output ends of the two flipping devices 4 are fixedly connected to the same bottom plate 7, a clamping device 5 is fixedly connected to the side of the flipping device 4 close to the bottom plate 7, the output ends of the two clamping devices 5 are fixedly connected to the same movable plate 6, a transport device 8 is installed on the inner wall of the frame 1, an adjusting device 2 is provided on the side of the frame 1 close to the flipping device 4, and an auxiliary device 3 is provided on the side of the lifting plate 206 close to the protrusion 212.

[0031] The specific settings and functions of the adjustment device 2 and the auxiliary device 3 are described in detail below.

[0032] Reference Figure 2 , Figure 3 and Figure 4As shown, in this embodiment: the adjusting device 2 includes a fixed plate 201, the fixed plate 201 is fixedly connected to the frame 1, and the side end of the fixed plate 201 away from the frame 1 is fixedly connected to a connecting plate 207, and the side of the connecting plate 207 away from the fixed plate 201 is fixedly connected to a motor 202, and the output end of the motor 202 is fixedly connected to a rotating rod 203, and the arc surface thread of the rotating rod 203 penetrates a lifting plate 206, and the arc surface of the rotating rod 203 is rotatably connected to the end of the motor 202. The end of the rotating rod 203 away from the motor 202 is rotatably connected to the adjusting plate 204, and the inner wall of the adjusting plate 204 slides through the limiting rod 205, and the limiting rod 205 slides through the lifting plate 206, and the limiting rod 205 is away from One end of the adjustment plate 204 is fixedly connected to the fixed plate 201. The conductive cross arm of the electric arc furnace is a component used to transmit electrical energy and support electrodes in the electric arc furnace. These cross arms are usually made of high-strength aluminum alloy, so the conductive cross arm can also be called an aluminum alloy conductive cross arm. When it is necessary to perform quality inspection on the aluminum alloy conductive cross arm, suitable measuring tools, such as calipers or three-dimensional coordinate measuring machines, are usually used to measure the key dimensions and geometric shapes of the aluminum alloy conductive cross arm, and check whether the surface of the aluminum alloy conductive cross arm is flat and has no obvious cracks, slag or pores. The aluminum alloy conductive cross arm is placed on the transport device 8 by manual transportation, and the aluminum alloy conductive cross arm can be pushed toward the bottom plate 7 by the transport device 8, and the aluminum alloy conductive cross arm is passed through After the transport device 8 is pushed onto the bottom plate 7, the clamping device 5 can be started. The movement of the clamping device 5 will drive the movable plate 6 to move in the direction of the aluminum alloy conductive cross arm, so that the aluminum alloy conductive cross arm can be clamped under the action of the bottom plate 7 and the movable plate 6. At this time, the flipping device 4 can be started, and the aluminum alloy conductive cross arm can be flipped by the flipping device 4, so that it is convenient for workers to perform quality inspection on the aluminum alloy conductive cross arm. However, in the process of placing the aluminum alloy conductive cross arm on the transport device 8, it is found that due to the high height of the frame 1, the speed of manually carrying the aluminum alloy conductive cross arm and placing it on the transport device 8 is slow, and multiple manual handling will also cause fatigue of the workers' limbs, affecting the work efficiency. The process of carrying the aluminum alloy conductive cross arm When the hand slips, there will be safety risks. At this time, the adjustment device 2 can be used to replace manual lifting of the aluminum alloy conductive cross arm, so as to improve the efficiency of placing the aluminum alloy conductive cross arm on the transportation device 8, improve the speed of quality inspection of the aluminum alloy conductive cross arm, and avoid safety hazards when carrying the aluminum alloy conductive cross arm. The arc surface of the motor 202 is slidably connected with a protective shell 208, and one end of the arc surface of the protective shell 208 is fixedly connected with a threaded block 209. The internal thread of the threaded block 209 is penetrated by a screw 210, and the screw 210 is threadedly connected to the connecting plate 207. The cost of the motor 202 is relatively high, and the motor 202 will not be able to continue to work when it is damaged. At this time, the protective shell 208 can be installed on the surface of the motor 202 through the screw 210.The protective shell 208 can be used to protect the surface of the motor 202, so that the protective shell 208 can be used to increase the service life of the motor 202. The end of the lifting plate 206 away from the frame 1 is fixedly connected with an auxiliary plate 211. The cross section of the auxiliary plate 211 is arc-shaped. When the aluminum alloy conductive cross arm is connected to the lifting plate 206, the auxiliary plate 211 installed on the lifting plate 206 can improve the connection efficiency of the aluminum alloy conductive cross arm and the lifting plate 206, and improve the stability of the connection between the aluminum alloy conductive cross arm and the lifting plate 206. Workers can use the auxiliary plate 211 to connect the aluminum alloy conductive cross arm to the lifting plate 206. The conductive cross arm is pushed onto the lifting plate 206 by sliding, so that effort can be saved. A plurality of protrusions 212 are fixedly connected to one side of the lifting plate 206 close to the connecting plate 207. The plurality of protrusions 212 are evenly distributed on one side of the lifting plate 206. When the aluminum alloy conductive cross arm is pushed onto the transport device 8 through the lifting plate 206, the protrusions 212 installed on the lifting plate 206 can reduce the friction between the lifting plate 206 and the aluminum alloy conductive cross arm, so that the aluminum alloy conductive cross arm can better move on the lifting plate 206 toward the transport device 8 through the protrusions 212.

[0033] Reference Figure 5 As shown, in this embodiment: the auxiliary device 3 includes two fixed blocks 31, and the two fixed blocks 31 are respectively fixedly connected to the two ends of the side of the lifting plate 206, and the sides of the two fixed blocks 31 close to each other are fixedly connected with springs 32, and the end of the spring 32 away from the fixed block 31 is fixedly connected with a clamping plate 34, and the inner wall of the spring 32 is slidably penetrated by a connecting rod 33, and one end of the connecting rod 33 is fixedly connected to the clamping plate 34, and the connecting rod 33 slides through the fixed block 31. When the height of the aluminum alloy conductive cross arm is raised and lowered by the adjusting device 2, the position of the aluminum alloy conductive cross arm on the adjusting device 2 can be limited by the auxiliary device 3, so that the stability of the adjusting device 2 when raising and lowering the aluminum alloy conductive cross arm can be improved by the auxiliary device 3, and the side of the clamping plate 34 away from the frame 1 is fixedly connected with a guide Plate 36, guide plate 36 is a titanium alloy plate. When the aluminum alloy conductive cross arm is placed between the two clamping plates 34, it is only necessary to push the aluminum alloy conductive cross arm in the direction of the clamping plate 34, and the guide plate 36 installed on the clamping plate 34 can move the two clamping plates 34 in the direction away from each other, so that the efficiency of the clamping plate 34 in limiting the aluminum alloy conductive cross arm can be improved by the guide plate 36. A plurality of anti-skid grooves 35 are provided on the side where the two clamping plates 34 are close to each other, and the plurality of anti-skid grooves 35 are evenly distributed on one side of the clamping plate 34. When the two clamping plates 34 come into contact with the aluminum alloy conductive cross arm, the anti-skid grooves 35 provided on the clamping plate 34 can increase the friction between the clamping plate 34 and the aluminum alloy conductive cross arm, so that the stability of limiting the aluminum alloy conductive cross arm can be improved by increasing the friction between the two.

[0034] Detailed explanation of usage: When the aluminum alloy conductive cross arm needs to be moved to the transport device 8, the aluminum alloy conductive cross arm is placed on the lifting plate 206. At this time, the motor 202 installed on the connecting plate 207 can be started. The movement of the motor 202 will drive the rotating rod 203 to rotate on the lifting plate 206 through the output end. The rotation of the rotating rod 203 will rotate on the adjusting plate 204, so that the lifting plate 206 can be driven to adjust its height along the direction of the limit rod 205 under the drive of the rotating rod 203. The lifting plate 206 can be adjusted in height by starting the motor 202, so that the aluminum alloy conductive cross arm installed on the lifting plate 206 can be adjusted in height, so that the aluminum alloy conductive cross arm can be adjusted to one side of the transport device 8, so as to facilitate placing the aluminum alloy conductive cross arm on the transport device 8.

[0035] Before raising or lowering the aluminum alloy conductive cross arm by the adjusting device 2, one of the clamps 34 is pressed in the direction close to the spring 32. At this time, the spring 32 is rolled up along the direction of the connecting rod 33 when pressed. After the spring 32 is rolled up, it can cooperate with the clamp 34 to move. At this time, the aluminum alloy conductive cross arm is placed between the two clamps 34, and the clamps 34 can be loosened. At this time, the spring 32 is reset and moves in the direction of the connecting rod 33 toward the direction of the aluminum alloy conductive cross arm, so that the clamp 34 can be driven to contact the aluminum alloy conductive cross arm under the action of the spring 32, so that the stability of the aluminum alloy conductive cross arm on the adjusting device 2 can be improved through the clamp 34.

Claims

1. A quality inspection tool for aluminum alloy conductive cross arms of electric arc furnaces, comprising a frame (1), characterized in that: Two flipping devices (4) are installed on the upper surface of the frame (1), the output ends of the two flipping devices (4) are fixedly connected to the same bottom plate (7), the side of the flipping device (4) close to the bottom plate (7) is fixedly connected to a clamping device (5), the output ends of the two clamping devices (5) are fixedly connected to the same moving plate (6), a transport device (8) is installed on the inner wall of the frame (1), the side of the frame (1) close to the flipping device (4) is provided with an adjustment device (2), the adjustment device (2) comprises a fixed plate (201), the fixed plate (201) is fixedly connected to the frame (1), the side end of the fixed plate (201) away from the frame (1) is fixedly connected to a connecting plate (207), the connecting plate ( A motor (202) is fixedly connected to a side of the rotating rod (207) away from the fixed plate (201), and an output end of the motor (202) is fixedly connected to a rotating rod (203). The arc surface of the rotating rod (203) is threadedly penetrated by a lifting plate (206). An end of the arc surface of the rotating rod (203) away from the motor (202) is rotatably connected to an adjusting plate (204). The end of the rotating rod (203) away from the motor (202) is rotatably connected to the adjusting plate (204). The inner wall of the adjusting plate (204) is slidably penetrated by a limiting rod (205). The limiting rod (205) and the lifting plate (206) are slidably penetrated. The end of the limiting rod (205) away from the adjusting plate (204) is fixedly connected to the fixed plate (201).

2. The arc furnace aluminum alloy conductive cross arm quality detection tool according to claim 1, characterized in that: The arc surface of the motor (202) is slidably connected to a protective shell (208), one end of the arc surface of the protective shell (208) is fixedly connected to a threaded block (209), the internal thread of the threaded block (209) is penetrated by a screw rod (210), and the screw rod (210) is threadedly connected to the connecting plate (207).

3. The arc furnace aluminum alloy conductive cross arm quality detection tool according to claim 1, characterized in that: One end of the lifting plate (206) away from the frame (1) is fixedly connected to an auxiliary plate (211), and the cross section of the auxiliary plate (211) is arc-shaped.

4. The arc furnace aluminum alloy conductive cross arm quality detection tool according to claim 1, characterized in that: A plurality of protrusions (212) are fixedly connected to one side of the lifting plate (206) close to the connecting plate (207), and the plurality of protrusions (212) are evenly distributed on one side of the lifting plate (206).

5. The arc furnace aluminum alloy conductive cross arm quality detection tool according to claim 1, characterized in that: An auxiliary device (3) is provided on one side of the lifting plate (206) close to the protrusion (212), and the auxiliary device (3) comprises two fixed blocks (31), and the two fixed blocks (31) are respectively fixedly connected to the two ends of the side of the lifting plate (206), and the two fixed blocks (31) are fixedly connected to the sides close to each other with springs (32), and the end of the spring (32) away from the fixed block (31) is fixedly connected to a clamping plate (34), and the inner wall of the spring (32) is slidably penetrated by a connecting rod (33), one end of the connecting rod (33) is fixedly connected to the clamping plate (34), and the connecting rod (33) and the fixed block (31) are slidably penetrated.

6. The arc furnace aluminum alloy conductive cross arm quality detection tool according to claim 5, characterized in that: A guide plate (36) is fixedly connected to the side of the clamping plate (34) away from the frame (1), and the guide plate (36) is a titanium alloy plate.

7. The arc furnace aluminum alloy conductive cross arm quality detection tool according to claim 5, characterized in that: A plurality of anti-skid grooves (35) are provided on one side of the two clamping plates (34) close to each other, and the plurality of anti-skid grooves (35) are evenly distributed on one side of the clamping plates (34).

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