Anti-blocking tray for irradiation

Abstract

The utility model relates to the technical field of anti-jamming trays, in particular to an anti-jamming tray for irradiation, which comprises an anti-jamming tray body, stable assembly mechanisms are arranged on the surfaces of the anti-jamming tray body and a fixing plate, and anti-jamming mechanisms are arranged in the anti-jamming tray body and on the surface of a limiting clamping plate. Universal limiting mechanisms are arranged on the inner walls of the limiting clamping plates. According to the anti-jamming tray, the fire-fighting and sterilizing effects of the anti-jamming tray are better, and articles can be clamped and limited on the surface of the anti-jamming tray body when the anti-jamming tray is used, so that the anti-jamming tray can stably sterilize and disinfect the articles on the surface of the anti-jamming tray body; and when the anti-blocking tray is used, the phenomenon that an object is blocked when entering the frame body to be killed can be avoided, so that the anti-blocking tray is more convenient and faster to use, and the practicability of the anti-blocking tray is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-jamming trays, in particular to an anti-jamming tray for irradiation. Background Art

[0002] Electron accelerator irradiation is a technology that uses an electron accelerator to generate high-energy electron beams and use them for irradiation treatment of materials, objects or biological samples. In electron accelerator irradiation, the electron accelerator first accelerates electrons to a high energy level through an accelerating electric field. Now, an anti-jamming tray for irradiation is needed.

[0003] When the goods on the existing anti-jamming pallet are transported on the under-beam transmission line, the goods may get stuck and stop at the under-beam irradiation port. The beam irradiation time is too long, which may burn the box body. In addition, the existing anti-jamming pallet has some disadvantages to a certain extent. The anti-jamming pallet needs to be assembled before use. The existing anti-jamming pallet is not convenient to assemble, and the assembly steps are often cumbersome. This makes it impossible to assemble the anti-jamming pallet body according to the volume of the goods when using the anti-jamming pallet, which reduces the fire-fighting and sterilization effect of the anti-jamming pallet; since the sizes of the goods are different, the versatility of the anti-jamming pallet is required to be high. The existing anti-jamming pallet is inconvenient to clamp and limit goods of different sizes when in use, which makes the anti-jamming pallet unable to stably sterilize the goods on the surface of the anti-jamming pallet body; the anti-jamming pallet is prone to collision and jamming when in use. The existing anti-jamming pallet does not have the anti-jamming function when in use, which makes it easy for the anti-jamming pallet to cause the goods to get stuck when entering the interior of the frame for disinfection, making the anti-jamming pallet not convenient and quick to use, and greatly reducing the practicality of the anti-jamming pallet. Utility Model Content

[0004] The purpose of the present utility model is to provide an anti-jamming tray for irradiation, so as to solve the problems raised in the above-mentioned background technology that the anti-jamming tray is not convenient to assemble, the assembly steps are often cumbersome, it is inconvenient to clamp and limit items of different sizes, and it does not have an anti-jamming function.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an anti-stuck tray for irradiation, comprising an anti-stuck tray body, a fixed plate provided under the anti-stuck tray body, the anti-stuck tray body and the fixed plate rotatably cooperate with each other, both sides of the anti-stuck tray body are provided with limiting splints for limiting and blocking articles, one end of the limiting splints respectively extends into the interior of the anti-stuck tray body, a frame is provided on the outside of the anti-stuck tray body, a control button is installed on the surface of the frame, a stable assembly mechanism is provided on the surface of the anti-stuck tray body and the fixed plate, the interior of the stable assembly mechanism includes a first magnet, a second magnet, an arc-shaped clip, a telescopic spring and a positioning block, the interior of the anti-stuck tray body and the surface of the limiting splint are both provided with an anti-stuck mechanism, the interior of the anti-stuck mechanism includes a fixing groove, a telescopic column and an anti-stuck component, the inner wall of the limiting splint is provided with a universal limiting mechanism, and the interior of the universal limiting mechanism includes a fixing cylinder, an electric push rod and a universal limiting part.

[0006] Preferably, a conveyor belt is installed inside the frame, the surface of the conveyor belt is fixed to the surface of the fixed plate, an electron linear accelerator is installed on the surface at the top position of the frame, and an electron beam drift scanning frame is installed inside the frame, and the electron beam drift scanning frame is fixed to the electron linear accelerator.

[0007] Preferably, the universal limiting part is arranged on the inner wall of the limiting splint, and the universal limiting part is composed of a movable column, a limiting plate and an anti-slip pad. The inner wall of the limiting splint is installed with a fixed cylinder, and a movable column is arranged inside the fixed cylinder. One end of the movable column extends to the outside of the fixed cylinder, and an electric push rod is installed inside the fixed cylinder. The input end of the electric push rod is electrically connected to the output end of the control button, and the output end of the electric push rod is fixed to the surface of the movable column.

[0008] Preferably, a limiting plate for clamping and limiting objects is provided on one side of the limiting clamp, and an anti-slip pad is adhered to the surface of the limiting plate. The limiting plate and the anti-slip pad are respectively located above the anti-stuck tray body, and one end of the movable column is fixed to the surface of the limiting plate.

[0009] Preferably, the anti-jamming component is arranged inside the anti-jamming tray body and on the surface of the limiting clamp. The anti-jamming component is composed of a spring body, a guide groove and a guide slider. A fixed groove is opened inside the anti-jamming tray body, and a telescopic column is installed inside the fixed groove.

[0010] Preferably, a spring body is mounted on the surface of the telescopic column, one end of the telescopic column is fixed to the surface of the limiting splint, one end of the spring body is fixed to the surface of the limiting splint, guide sliders are installed on the surfaces of both sides of the limiting splint, and guide grooves are provided on the inner walls of the anti-stuck tray body, and the guide grooves and the surfaces of the guide sliders slide in cooperation with each other.

[0011] Preferably, a positioning block is installed on the surface at the bottom position of the anti-stuck tray body, and the positioning block and the surface of the fixed plate are engaged with each other. A second magnet is installed on the surface at the bottom position of the positioning block, and the inner wall of the fixed plate is installed with a first magnet, and the surfaces of the first magnet and the second magnet are magnetically engaged with each other.

[0012] Preferably, the surface of the positioning block is provided with a groove, and an arc-shaped clip is provided inside the groove. The arc-shaped clip and the inner wall of the groove slide together, and the arc-shaped clip and the inner wall of the fixed plate are snap-fitted together. The surface of the arc-shaped clip is installed with a telescopic spring, and one end of the telescopic spring is fixed to the inner wall of the groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the anti-jamming tray for irradiation not only enables the anti-jamming tray body to be assembled according to the volume of the articles when the anti-jamming tray is used, thereby improving the fire-fighting and sterilization effect of the anti-jamming tray, but also enables the anti-jamming tray to clamp and limit the articles on the surface of the anti-jamming tray body when in use, so that the anti-jamming tray can stably sterilize and disinfect the articles on the surface of the anti-jamming tray body, and also enables the anti-jamming tray to avoid the articles from getting stuck when entering the interior of the frame for disinfection when in use, making the anti-jamming tray more convenient and quick to use, thereby greatly improving the practicality of the anti-jamming tray;

[0014] 1. By providing a stable assembly mechanism, the user places the anti-jamming tray body on the surface of the designated fixed plate, so that the anti-jamming tray body drives the positioning block to be stuck inside the fixed plate. At this time, the arc-shaped clip moves under the elastic force of the telescopic spring inside the groove, so that the arc-shaped clip is stuck inside the corresponding fixed plate. The positioning block drives the second magnet to move downward until it contacts the surface of the first magnet. Under the magnetic attraction of the second magnet and the first magnet, the anti-jamming tray body is installed on the surface of the fixed plate, realizing the convenient assembly function of the anti-jamming tray, so that the anti-jamming tray body can be assembled according to the volume of the items when in use, so that the fire-fighting and sterilization effect of the anti-jamming tray is better.

[0015] 2. A universal limit mechanism is provided to control the operation of the electric push rod inside the fixed cylinder. Under the action of the electric push rod, the mobile column is driven to slide inside the fixed cylinder. When the mobile column moves, the mobile column drives the limit plate and the anti-slip pad to move, so that the limit plate drives the anti-slip pad to move until it contacts the surface of the article. Under the joint action of the limit plate and the anti-slip pad, the article is clamped and fixed on the surface of the anti-jamming tray body, avoiding the displacement of the article on the surface of the anti-jamming tray body, realizing the function of the anti-jamming tray to clamp and limit articles of different sizes, so that the anti-jamming tray can clamp and limit the article on the surface of the anti-jamming tray body when in use, so that the anti-jamming tray can stably sterilize the articles on the surface of the anti-jamming tray body;

[0016] 3. By providing an anti-jamming mechanism, the limit splint is driven to move under the joint action of the telescopic column and the spring body inside the fixed groove, so that the limit splint drives the guide slider to slide inside the guide groove, and the limit splint is guided under the joint action of the guide groove and the guide slider. At this moment, when a collision occurs on the surface of the limit splint, the limit splint squeezes the spring body and the telescopic column inside the fixed groove, so that the limit splint contracts away from the inner wall of the frame, avoiding collision and jamming when the items are transported inside the frame, realizing the anti-jamming function of the anti-jamming tray, so that when the anti-jamming tray is used, it can avoid the jamming of items when entering the interior of the frame for disinfection, making the anti-jamming tray more convenient and quick to use, and greatly improving the practicality of the anti-jamming tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0019] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of the general limit mechanism;

[0020] Figure 4 For the utility model Figure 2 A magnified structural diagram of the central anti-stuttering mechanism;

[0021] Figure 5 It is an enlarged structural diagram of the stable assembly mechanism of the present invention.

[0022] In the figure: 1. Anti-stuck tray body; 101. Fixed plate; 102. Frame; 103. Electron linear accelerator; 104. Control button; 105. Conveyor belt; 106. Limiting splint; 107. Electron beam drift scanning frame; 2. Universal limiting mechanism; 21. Fixed cylinder; 22. Electric push rod; 23. Universal limiting part; 231. Moving column; 232. Limiting plate; 233. Anti-slip pad; 3. Anti-stuck mechanism; 31. Fixed groove; 32. Telescopic column; 33. Anti-stuck component; 331. Spring body; 332. Guide slide groove; 333. Guide slide; 4. Stable assembly mechanism; 41. First magnet; 42. Second magnet; 43. Arc-shaped clamp; 44. Telescopic spring; 45. Positioning block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] The utility model provides a structure of an anti-stuck tray for irradiation. Figure 1 and Figure 2 As shown, it includes an anti-stuck tray body 1, a fixed plate 101 is provided at the bottom of the anti-stuck tray body 1, and the anti-stuck tray body 1 and the fixed plate 101 are rotatably matched with each other. Both sides of the anti-stuck tray body 1 are provided with limiting splints 106 for limiting and blocking articles, and one end of the limiting splint 106 extends to the interior of the anti-stuck tray body 1. A frame 102 is provided on the outside of the anti-stuck tray body 1, and a control button 104 is installed on the surface of the frame 102. The model of the control button 104 can be JO series. A conveyor belt 105 is installed inside the frame 102, and the surface of the conveyor belt 105 is fixed to the surface of the fixed plate 101. An electron linear accelerator 103 is installed on the surface at the top position of the frame 102, and an electron beam drift scanning frame 107 is installed inside the frame 102. The electron beam drift scanning frame 107 is fixed to the electron linear accelerator 103.

[0025] Furthermore, if Figure 2 and Figure 5As shown, the surfaces of the anti-stuck tray body 1 and the fixed plate 101 are both provided with a stable assembly mechanism 4, and the interior of the stable assembly mechanism 4 includes a first magnet 41, a second magnet 42, an arc-shaped clip 43, a telescopic spring 44 and a positioning block 45. The surface at the bottom position of the anti-stuck tray body 1 is installed with a positioning block 45, and the positioning block 45 and the surface of the fixed plate 101 are mutually engaged, and the surface at the bottom position of the positioning block 45 is installed with a second magnet 42. The inner wall of the fixed plate 101 is installed with the first magnet 41, and the surfaces of the first magnet 41 and the second magnet 42 are magnetically engaged with each other. The surface of the positioning block 45 is opened with a groove, and the inside of the groove is provided with an arc-shaped clip 43, and the arc-shaped clip 43 and the inner wall of the groove slide with each other, and the arc-shaped clip 43 and the inner wall of the fixed plate 101 are mutually engaged, and the surface of the arc-shaped clip 43 is installed with a telescopic spring 44, and one end of the telescopic spring 44 is fixed to the inner wall of the groove.

[0026] During implementation, the anti-stuck tray body 1 drives the positioning block 45 to be stuck to the inside of the fixed plate 101. At this time, the arc-shaped clip 43 is driven to move under the elastic force of the telescopic spring 44 inside the groove, so that the arc-shaped clip 43 is stuck to the inside of the corresponding fixed plate 101. The positioning block 45 drives the second magnet 42 to move downward until it contacts the surface of the first magnet 41. Under the magnetic attraction of the second magnet 42 and the first magnet 41, the anti-stuck tray body 1 is installed on the surface of the fixed plate 101 to realize the function of convenient assembly of the anti-stuck tray.

[0027] Further, if Figure 2 and Figure 4 As shown, the interior of the anti-stuck tray body 1 and the surface of the limit splint 106 are both provided with an anti-stuck mechanism 3, the interior of the anti-stuck mechanism 3 includes a fixed groove 31, a telescopic column 32 and an anti-stuck component 33, and the anti-stuck component 33 is arranged inside the anti-stuck tray body 1 and on the surface of the limit splint 106. The anti-stuck component 33 is composed of a spring body 331, a guide slide groove 332 and a guide slider 333. The interior of the anti-stuck tray body 1 is provided with a fixed groove 31, the interior of the fixed groove 31 is installed with a telescopic column 32, the surface of the telescopic column 32 is covered with a spring body 331, one end of the telescopic column 32 is fixed to the surface of the limit splint 106, and one end of the spring body 331 is fixed to the surface of the limit splint 106. Guide sliders 333 are installed on the surfaces of both sides of the limit splint 106, and the inner wall of the anti-stuck tray body 1 is provided with a guide groove 332, and the guide groove 332 and the surface of the guide slider 333 slide with each other.

[0028] During implementation, the limiting splint 106 is driven to move under the joint action of the telescopic column 32 and the spring body 331 inside the fixed groove 31, so that the limiting splint 106 drives the guide slider 333 to slide inside the guide groove 332, and the limiting splint 106 is guided under the joint action of the guide groove 332 and the guide slider 333. At this moment, when a collision occurs on the surface of the limiting splint 106, the limiting splint 106 squeezes the spring body 331 and the telescopic column 32 inside the fixed groove 31, so that the limiting splint 106 retracts and moves away from the inner wall of the frame 102, avoiding collision and jamming when the items are transported inside the frame 102, so as to realize the anti-jamming function of the anti-stuck tray.

[0029] Furthermore, if Figure 2 and Figure 3 As shown, the inner wall of the limiting splint 106 is provided with a universal limiting mechanism 2, the interior of the universal limiting mechanism 2 includes a fixed cylinder 21, an electric push rod 22 and a universal limiting portion 23, the universal limiting portion 23 is provided on the inner wall of the limiting splint 106, the universal limiting portion 23 is composed of a moving column 231, a limiting plate 232 and an anti-slip pad 233, the inner wall of the limiting splint 106 is installed with a fixed cylinder 21, the interior of the fixed cylinder 21 is provided with a moving column 231, one end of the moving column 231 extends to the outside of the fixed cylinder 21, the interior of the fixed cylinder 21 An electric push rod 22 is installed, and the model of the electric push rod 22 can be selected from the DG series. The input end of the electric push rod 22 is electrically connected to the output end of the control button 104, and the output end of the electric push rod 22 is fixed to the surface of the moving column 231. A limiting plate 232 for clamping and limiting objects is provided on one side of the limiting splint 106. An anti-slip pad 233 is adhered to the surface of the limiting plate 232. The limiting plate 232 and the anti-slip pad 233 are respectively located above the anti-stuck tray body 1, and one end of the moving column 231 is fixed to the surface of the limiting plate 232.

[0030] During implementation, the electric push rod 22 inside the fixed cylinder 21 is controlled to work, and under the action of the electric push rod 22, the movable column 231 is driven to slide inside the fixed cylinder 21. When the movable column 231 moves, the movable column 231 drives the limiting plate 232 and the anti-slip pad 233 to move, so that the limiting plate 232 drives the anti-slip pad 233 to move until it contacts the surface of the object. Under the joint action of the limiting plate 232 and the anti-slip pad 233, the object is clamped and fixed on the surface of the anti-jamming tray body 1, avoiding the displacement of the object on the surface of the anti-jamming tray body 1, so as to realize the function of the anti-jamming tray to clamp and limit objects of different sizes.

[0031] Working principle: When in use, first place the anti-stuck tray body 1 at the designated position, and the user assembles the anti-stuck tray body 1 according to the size of the items to be disinfected. The user places the anti-stuck tray body 1 on the surface of the designated fixed plate 101, so that the anti-stuck tray body 1 drives the positioning block 45 to be stuck to the inside of the fixed plate 101. At this time, under the elastic force of the telescopic spring 44 inside the groove, the arc-shaped clip 43 is driven to move, so that the arc-shaped clip 43 is stuck to the inside of the corresponding fixed plate 101, and the positioning block 45 drives the second magnet 42 to move downward until it contacts the surface of the first magnet 41. Under the magnetic action of the second magnet 42 and the first magnet 41, the anti-stuck tray body 1 is installed on the surface of the fixed plate 101 to realize the function of convenient assembly of the anti-stuck tray, so that the anti-stuck tray body 1 can be assembled according to the volume of the items when the anti-stuck tray is used, so that the fire-fighting and sterilization effect of the anti-stuck tray is better.

[0032] Afterwards, the user places the object to be disinfected on the surface of the anti-stuck tray body 1, and the user operates the control button 104, so that the control button 104 controls the electric push rod 22 inside the fixed cylinder 21 to work, and under the action of the electric push rod 22, the moving column 231 is driven to slide inside the fixed cylinder 21. When the moving column 231 moves, the moving column 231 drives the limiting plate 232 and the anti-slip pad 233 to move, so that the limiting plate 232 drives the anti-slip pad 233 to move until it contacts the surface of the object. Under the joint action of the limiting plate 232 and the anti-slip pad 233, the object is clamped and fixed on the surface of the anti-stuck tray body 1, avoiding the displacement of the object on the surface of the anti-stuck tray body 1, so as to realize the function of the anti-stuck tray to clamp and limit objects of different sizes, so that the anti-stuck tray can clamp and limit the object on the surface of the anti-stuck tray body 1 when in use, so that the anti-stuck tray can stably sterilize the objects on the surface of the anti-stuck tray body 1.

[0033] Subsequently, the user operates the control button 104, so that the control button 104 controls the electron linear accelerator 103 to work. Under the joint action of the electron linear accelerator 103 and the electron beam drift scanning frame 107, the surface of the article is subjected to electron irradiation treatment, and the surface of the article is sterilized and disinfected. The article is conveyed under the action of the conveyor belt 105. When the anti-jamming tray body 1 moves inside the frame 102, collision and jamming are prone to occur. The anti-jamming tray body 1 rotates on the surface of the fixed plate 101 to avoid rotation.

[0034] When the cam 331 is in the closed position, the locking cam 333 is released and the locking cam 334 is in the closed position, so that the locking cam 333 is in the open position and the locking cam 334 is in the closed position.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

Claims

1. An anti-jamming tray for irradiation, comprising an anti-jamming tray body (1), characterized in that: A fixing plate (101) is provided below the anti-stuck tray body (1), and the anti-stuck tray body (1) and the fixing plate (101) are rotatably matched with each other. Both sides of the anti-stuck tray body (1) are provided with limiting clamps (106) for limiting and blocking articles, and one end of the limiting clamps (106) respectively extends to the inside of the anti-stuck tray body (1). A frame (102) is provided on the outside of the anti-stuck tray body (1), and a control button (104) is installed on the surface of the frame (102). A stable assembly mechanism (4) is provided on the surface of the anti-stuck tray body (1) and the fixing plate (101). The interior of the stable assembly mechanism (4) includes a first magnet (41), a second magnet (42), an arc-shaped clamp (43), a telescopic spring (44) and a positioning block (45); the interior of the anti-stuck tray body (1) and the surface of the limiting splint (106) are both provided with an anti-stuck mechanism (3); the interior of the anti-stuck mechanism (3) includes a fixed groove (31), a telescopic column (32) and an anti-stuck component (33); the inner wall of the limiting splint (106) is provided with a universal limiting mechanism (2); the interior of the universal limiting mechanism (2) includes a fixed cylinder (21), an electric push rod (22) and a universal limiting part (23).

2. The anti-jamming tray for irradiation according to claim 1, characterized in that: A conveyor belt (105) is installed inside the frame (102), and the surface of the conveyor belt (105) is fixed to the surface of the fixed plate (101). An electron linear accelerator (103) is installed on the surface at the top position of the frame (102). An electron beam drift scanning frame (107) is installed inside the frame (102), and the electron beam drift scanning frame (107) is fixed to the electron linear accelerator (103).

3. The anti-jamming tray for irradiation according to claim 1, characterized in that: The universal limiting portion (23) is arranged on the inner wall of the limiting clamp (106), and the universal limiting portion (23) is composed of a moving column (231), a limiting plate (232) and an anti-slip pad (233). The inner wall of the limiting clamp (106) is installed with a fixed cylinder (21), and the interior of the fixed cylinder (21) is provided with a moving column (231). One end of the moving column (231) extends to the outside of the fixed cylinder (21), and the interior of the fixed cylinder (21) is provided with an electric push rod (22). The input end of the electric push rod (22) is electrically connected to the output end of the control button (104), and the output end of the electric push rod (22) is fixed to the surface of the moving column (231).

4. The anti-jamming tray for irradiation according to claim 3, characterized in that: A limiting plate (232) for clamping and limiting an article is provided on one side of the limiting clamp (106); a non-slip pad (233) is adhered to the surface of the limiting plate (232); the limiting plate (232) and the non-slip pad (233) are respectively located above the anti-stuck tray body (1); and one end of the movable column (231) is fixed to the surface of the limiting plate (232).

5. The anti-jamming tray for irradiation according to claim 1, characterized in that: The anti-jamming component (33) is arranged inside the anti-jamming tray body (1) and on the surface of the limiting clamp (106). The anti-jamming component (33) is composed of a spring body (331), a guide slide groove (332) and a guide slider (333). The anti-jamming tray body (1) is provided with a fixed groove (31) inside, and a telescopic column (32) is installed inside the fixed groove (31).

6. The anti-jamming tray for irradiation according to claim 5, characterized in that: The surface of the telescopic column (32) is provided with a spring body (331), one end of the telescopic column (32) is fixed to the surface of the limiting splint (106), one end of the spring body (331) is fixed to the surface of the limiting splint (106), and the surfaces of both sides of the limiting splint (106) are both installed with guide sliders (333), and the inner wall of the anti-stuck tray body (1) is provided with guide grooves (332), and the guide grooves (332) and the surfaces of the guide sliders (333) slide in cooperation with each other.

7. The anti-jamming tray for irradiation according to claim 1, characterized in that: The surface at the bottom position of the anti-stuck tray body (1) is installed with a positioning block (45), and the positioning block (45) and the surface of the fixed plate (101) are mutually engaged and matched. The surface at the bottom position of the positioning block (45) is installed with a second magnet (42), and the inner wall of the fixed plate (101) is installed with a first magnet (41), and the surfaces of the first magnet (41) and the second magnet (42) are mutually magnetically engaged.

8. The anti-jamming tray for irradiation according to claim 7, characterized in that: The surfaces of the positioning blocks (45) are all provided with grooves, and arc-shaped clamps (43) are provided inside the grooves. The arc-shaped clamps (43) and the inner wall of the grooves are slidably matched with each other. The arc-shaped clamps (43) and the inner wall of the fixing plate (101) are mutually engaged and matched. The surfaces of the arc-shaped clamps (43) are all provided with telescopic springs (44), and one end of the telescopic springs (44) is fixed to the inner wall of the grooves.

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