Wood surface mothproof liquid soaking treatment equipment

Abstract

According to the wood surface mothproof liquid soaking treatment equipment, an extension plate is arranged in a mounting frame, limiting grooves are formed in the two sides of the mounting frame correspondingly, a fixing plate is arranged in the limiting grooves, a connecting block is arranged in the fixing plate, the side wall of the connecting block is fixed to the side wall of the extension plate, and a buffer damping rod is arranged in the mounting frame; one end of the buffer damping rod is arranged on one side of the connecting block; and the liquid spraying plate is arranged at one end of the L-shaped conveying pipe, the blocking limiting rod is arranged in the L-shaped extending pipe, and the liquid spraying plate is located above the mounting frame, so that mothproof liquid is conveniently sprayed to the surface of the plate body. Through arrangement of the plate clamping and fixing assembly and the liquid conveying assembly, the size of an internal extension plate can be flexibly adjusted according to the specific size of a plate body, and through cooperation with magnetic fixation of a first magnetic plate and a second magnetic plate, it is ensured that a plate is not prone to moving or falling off in the treatment process.

Description

Technical Field

[0001] The invention belongs to the technical field of wood anti-insect treatment, in particular to a device for soaking and treating wood surface with anti-insect liquid. Background Art

[0002] As the main material for making furniture, the quality of wood greatly affects the quality and appearance of furniture. Wood boards need to be soaked in moth-proofing liquid before leaving the factory. Existing moth-proofing liquid soaking equipment often fixes the wood with simple trays or hooks. The fixing method is difficult to adapt to wood of different sizes and shapes, which can easily cause the wood to shift during the soaking process due to lack of firm fixation, affecting the soaking effect. At the same time, during the soaking process of traditional equipment, due to the lack of effective liquid guiding components, the application of moth-proofing agents often cannot ensure uniform coverage of the surface and interior of the wood. Especially for wood with complex structures or dense textures, the moth-proofing ingredients are difficult to penetrate deeply, affecting the overall moth-proofing effect of the wood. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a wood surface anti-moth liquid immersion treatment device to at least partially solve the above technical problems.

[0004] The technical solution adopted by the present invention is as follows: The present invention provides a wood surface anti-moth liquid immersion treatment device, comprising: A plate clamping and fixing component comprises an installation frame, an extension plate, a fixing plate and a buffer damping rod, wherein the extension plate is arranged inside the installation frame, and limiting grooves are respectively provided on both sides of the installation frame, the fixing plate is arranged inside the limiting grooves, and a connecting block is provided inside the fixing plate, and the side wall of the connecting block is fixed to the side wall of the extension plate, the buffer damping rod is arranged inside the installation frame, and one end of the buffer damping rod is arranged on one side of the connecting block; a liquid conveying component comprises an L-shaped conveying pipe, a liquid spraying plate, an L-shaped extension pipe and a blocking limiting rod, the liquid spraying plate is arranged at one end of the L-shaped conveying pipe, the blocking limiting rod is arranged inside the L-shaped extension pipe, and the liquid spraying plate is located above the installation frame to facilitate the spraying of moth-proof liquid on the surface of the plate body.

[0005] In one embodiment of the present invention, the wood surface immersion treatment equipment with anti-moth liquid also includes: a working box and a board body, the working box is provided with a carrying plate inside, the board body is arranged inside the carrying plate, and the bottom of the carrying plate is provided with filtering holes for filtering the anti-moth liquid and facilitating the immersion of the back side of the board body.

[0006] In one embodiment of the present invention, a first magnetic plate is provided on one side of the connection block, and a second magnetic plate matched with the first magnetic plate is provided on the inner wall of the fixing plate for fixing the position of the connection block inside the fixing plate.

[0007] In one embodiment of the present invention, electric lifters are respectively provided on both sides of the working box body, and a lifting auxiliary rod is provided at the working end of the electric lifter, one end of the lifting auxiliary rod is provided on the outer wall of the mounting frame, and a shock-absorbing damping rod is provided at the bottom of the electric lifter, one end of the shock-absorbing damping rod is provided on the outer wall of the supporting plate, which is used to buffer the pressure borne by the supporting plate.

[0008] In one embodiment of the present invention, a liquid delivery pump and a liquid extraction pump are provided at the bottom of the working box body, one end of the L-shaped delivery pipe is provided at the working end of the liquid delivery pump, and the working end of the liquid extraction pump is provided with an L-shaped return pipe, and the other end of the L-shaped return pipe is provided on one side of the supporting plate to facilitate the recovery of the used moth-proofing liquid, and one end of the L-shaped delivery pipe and the L-shaped return pipe are provided with a filter plate for filtering impurities in the moth-proofing liquid.

[0009] In one embodiment of the present invention, the L-shaped extension tube is provided with two groups, and the insides of the two groups of L-shaped extension tubes are respectively provided with a liquid delivery pump control button and a liquid extraction pump control button, and under the impact of the moth-proofing liquid, the blocking limit rod slides inside the L-shaped extension tube to touch the liquid delivery pump control button and the liquid extraction pump control button; The liquid delivery pump control button is electrically controlled and connected to the liquid delivery pump via a conductive line, and the liquid extraction pump control button is electrically controlled and connected to the liquid extraction pump via a conductive line.

[0010] In one embodiment of the present invention, a control panel is provided on the outer wall of the working box, and the control panel is electrically controlled and connected with the electric lifter and the liquid delivery pump via a conductive line.

[0011] In one embodiment of the present invention, the four corners of the bottom surface of the working box are provided with fixed columns, the bottom surfaces of the four groups of the fixed columns are provided with wear-resistant pads, and the bottom surfaces of the four groups of the wear-resistant pads are provided with anti-slip grooves to improve the overall stability of the equipment.

[0012] Beneficial effects of the present invention: The present invention provides a plate clamping and fixing assembly and a liquid conveying assembly, and the size of the internal extension plate can be flexibly adjusted according to the specific size of the plate body, and the magnetic fixation of the first magnetic plate and the second magnetic plate ensures that the plate will not be easily moved or fallen off during the processing; In addition, the gap reserved at the bottom of the extension board ensures that the moth-proofing liquid can flow smoothly, allowing the front and back of the wood to be soaked in the anti-moth liquid at the same time, improving the processing efficiency and ensuring that the wood absorbs the anti-moth ingredients in all directions, thereby enhancing the anti-moth effect.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 A schematic structural diagram of a plate clamping and fixing assembly of a wood surface mothproofing liquid soaking treatment device according to an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a wood surface anti-moth liquid immersion treatment device according to an embodiment of the present invention; Figure 3 A top view of a wood surface anti-moth liquid soaking treatment device according to an embodiment of the present invention; Figure 4 A front view of a wood surface anti-moth liquid soaking treatment device according to an embodiment of the present invention; Figure 5 A side view of a wood surface anti-moth liquid soaking treatment device according to an embodiment of the present invention; Figure 6 for Figure 3 A cross-sectional view along the cutting line AA; Figure 7 for Figure 4 A cross-sectional view along the cutting line BB; Figure 8 for Figure 4 A cross-sectional view along the cutting line CC; Fig. 9 for Figure 5 Sectional view along cutting line DD.

[0015] In the figure: 1. Plate clamping and fixing assembly; 2. Mounting frame; 3. Extension plate; 4. Limiting groove; 5. Fixing plate; 6. Connecting block; 7. First magnetic plate; 8. Second magnetic plate; 9. Buffering damping rod; 10. Electric lifter; 11. Lifting auxiliary rod; 12. Shock-absorbing damping rod; 13. Working box; 14. Plate body; 15. Control panel; 16. Fixing column; 17. Wear-resistant pad; 18. Liquid delivery assembly; 19. L-shaped delivery pipe; 20. Liquid spraying plate; 21. L-shaped return pipe; 22. L-shaped extension pipe; 23. Filter plate; 24. Blocking limiting rod; 25. Liquid delivery pump control button; 26. Liquid pump control button; 27. Liquid delivery pump; 28. Liquid pump; 29. ​​Carrying plate; 30. Filter hole. DETAILED DESCRIPTION

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0017] A device for treating wood surface with anti-moth liquid by soaking is described below with reference to the accompanying drawings.

[0018] like Figure 1 As shown, an embodiment of the present invention provides a working box for immersion treatment of wood surface with anti-moth liquid, including: a plate clamping and fixing component 1, including a mounting frame 2, an extension plate 3, a fixing plate 5 and a buffer damping rod 9, the extension plate 3 is arranged inside the mounting frame 2, and limiting grooves 4 are respectively provided on both sides of the mounting frame 2, the fixing plate 5 is arranged inside the limiting groove 4, a connecting block 6 is arranged inside the fixing plate 5, and the side wall of the connecting block 6 is fixed to the side wall of the extension plate 3, the buffer damping rod 9 is arranged inside the mounting frame 2, one end of the buffer damping rod 9 is arranged on one side of the connecting block 6, one side of the connecting block 6 is provided with a first magnetic plate 7, and the inner wall of the fixing plate 5 is provided with a second magnetic plate 8 adapted to the first magnetic plate 7, which is used to fix the position of the connecting block 6 inside the fixing plate 5.

[0019] In a specific application of the embodiment of the present invention, after the plate body 14 is placed inside the working box 13, the extension plate 3 is pulled out from the inside of the mounting frame 2. To ensure smoothness and stability during operation, when the connecting block 6 slides inside the fixing plate 5, the buffer damping rod 9 provides resistance to it, thereby avoiding damage to the component due to excessive force (the size of the extension plate 3 is adjusted according to the size of the plate body 14, so that the plate body 14 can be fixed and the anti-moth liquid can flow through the surface of the plate body 14).

[0020] After the first magnetic plate 7 and the second magnetic plate 8 are fixed to each other by magnetic attraction, not only can the extension plate 3 remain stable in a fixed state and will not be easily moved or fallen off due to external force, but the gap reserved between the bottom of the extension plate 3 and the plate body 14 can ensure that the moth-proofing liquid can flow smoothly and evenly cover the wood surface, thereby achieving a comprehensive moth-proofing effect.

[0021] In a possible implementation, Figure 2 , Figure 6 , Figure 7 , Fig. 9 As shown, electric lifters 10 are respectively provided on both sides of the working box 13, and a lifting auxiliary rod 11 is provided at the working end of the electric lifter 10, one end of the lifting auxiliary rod 11 is arranged on the outer wall of the mounting frame 2, and a shock-absorbing damping rod 12 is provided at the bottom of the electric lifter 10, and one end of the shock-absorbing damping rod 12 is arranged on the outer wall of the bearing plate 29 for buffering the pressure borne by the bearing plate 29; the control panel 15 is electrically controlled and connected with the electric lifter 10 through a conductive line.

[0022] In a specific application of the embodiment of the present invention, the control panel 15 starts the electric lifter 10, and the electric lifter 10 works, driving the lifting auxiliary rod 11 to move toward the plate body 14 (downward), so that the plate clamping and fixing assembly 1 can firmly fix the plate body 14 inside the working box 13. At the same time, in the process of pressing down, in order to prevent the pressure from damaging the plate body 14, the shock-absorbing damping rod 12 quickly converts the applied pressure into a buffer force, thereby effectively reducing the pressure on the plate and protecting the plate from damage. (The electric lifter 10 used in this device is a mature existing technology, and the working principle of the electric lifter 10 is also well known to people in this technical field).

[0023] In a possible implementation, Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, the liquid delivery assembly 18 includes an L-shaped delivery pipe 19, a liquid spraying plate 20, an L-shaped extension pipe 22 and a blocking limit rod 24. The liquid spraying plate 20 is arranged at one end of the L-shaped delivery pipe 19, and the blocking limit rod 24 is arranged inside the L-shaped extension pipe 22. The liquid spraying plate 20 is located above the mounting frame 2, so as to facilitate the spraying of the anti-moth liquid on the surface of the plate body 14; a liquid delivery pump 27 and a liquid extraction pump 28 are arranged at the bottom of the working box 13, one end of the L-shaped delivery pipe 19 is arranged at the working end of the liquid delivery pump 27, and the working end of the liquid extraction pump 28 is provided with an L-shaped return pipe 21, and the other end of the L-shaped return pipe 21 is arranged on one side of the supporting plate 29, so as to facilitate the recovery of the anti-moth liquid after use. One end of the L-shaped delivery pipe 19 and the L-shaped return pipe 21 are both provided with a filter plate 23 for filtering impurities in the anti-moth liquid; the control panel 15 is electrically controlled and connected with the liquid delivery pump 27 through a conductive line.

[0024] There are two groups of L-shaped extension tubes 22, and the inside of the two groups of L-shaped extension tubes 22 are respectively provided with a liquid delivery pump control button 25 and a liquid extraction pump control button 26. Under the impact of the anti-moth liquid, the blocking limit rod 24 slides inside the L-shaped extension tube 22 to touch the liquid delivery pump control button 25 and the liquid extraction pump control button 26; the liquid delivery pump control button 25 is electrically controlled and connected to the liquid delivery pump 27 through a conductive line, and the liquid extraction pump control button 26 is electrically controlled and connected to the liquid extraction pump 28 through a conductive line.

[0025] In a specific application of the embodiment of the present invention, moth-proofing liquid is stored at the bottom of the working box 13 for a long time, and the control panel 15 starts the liquid delivery pump 27. The liquid delivery pump 27 pumps the moth-proofing liquid to the inside of the liquid spray plate 20 through the L-shaped delivery pipe 19. The liquid spray plate 20 sprays the moth-proofing liquid on the surface of the board body 14. As the moth-proofing liquid is continuously injected, the liquid level in the working box 13 gradually rises until the board body 14 is completely immersed, thereby achieving all-round moth-proofing treatment.

[0026] When the amount of liquid reaches a certain height, the flowing anti-moth liquid touches and pushes the blocking limit rod 24, triggering its sliding in the L-shaped extension tube 22. When the blocking limit rod 24 contacts the liquid delivery pump control button 25 and the liquid extraction pump control button 26 respectively, the liquid delivery pump 27 automatically shuts down and stops delivering the anti-moth liquid to the surface of the plate body 14. At the same time, the liquid extraction pump 28 automatically starts working. The liquid extraction pump 28 returns the anti-moth liquid inside the working box 13 to the bottom of the working box 13 through the L-shaped return pipe 21, which is convenient for recycling the anti-moth liquid and reducing resource consumption; and the anti-moth liquid inside the L-shaped delivery pipe 19 and the L-shaped return pipe 21 will be filtered through the filter plate 23, so that the anti-moth liquid maintains a normal use effect. (The liquid delivery pump 27 and the liquid extraction pump 28 used in this device are mature existing technologies, and the working principles of the liquid delivery pump 27 and the liquid extraction pump 28 are also well known to people in this technical field).

[0027] In a possible implementation, Figure 3 , Figure 7 , Figure 8 , Fig. 9 As shown, the working box for immersing the wood surface with anti-moth liquid comprises: a working box 13 and a board body 14. A carrying plate 29 is provided inside the working box 13. The board body 14 is provided inside the carrying plate 29. A filtering hole 30 is provided at the bottom of the carrying plate 29 for filtering the anti-moth liquid and facilitating the immersion of the back side of the board body 14.

[0028] In a specific application of the embodiment of the present invention, when the moth-proofing liquid begins to flow through the front side of the board body 14, the liquid naturally penetrates and evenly covers the surface of the board. At the same time, part of the moth-proofing liquid flows downward through the filter holes 30 on the supporting plate 29. The filter holes 30 have a moderate aperture size, which can ensure the smooth downward flow of the liquid and prevent the passage of impurities and large particles, thereby ensuring the purity of the moth-proofing liquid.

[0029] As the amount of mothproofing liquid increases, a certain amount of liquid gradually accumulates at the bottom of the carrier plate 29. At this time, due to the weight of the liquid, the gap between the carrier plate 29 and the board body 14 is automatically filled, thereby effectively soaking the back of the board body 14. The soaking method from both the front and back sides simultaneously makes the board body 14 completely surrounded by the mothproofing liquid, ensuring that every inch of wood can fully absorb the mothproofing ingredients, thereby improving the mothproofing effect of the treated board body 14.

[0030] In a possible implementation, Figure 4 As shown, the four corners of the bottom surface of the working box 13 are provided with fixing columns 16, the bottom surfaces of the four groups of fixing columns 16 are provided with wear-resistant pads 17, and the bottom surfaces of the four groups of wear-resistant pads 17 are provided with anti-slip grooves to improve the overall stability of the working box.

[0031] In a specific application of the embodiment of the present invention, four groups of fixing columns 16 are located on the bottom surface of the working box 13 to provide stability therefor. At the same time, the wear-resistant pads 17 cooperate with the anti-slip grooves to further provide grip for the working box 13, thereby providing stable support for the immersion of the plate body 14.

[0032] When the present invention is used in practice, after the board body 14 is placed inside the working box 13, the extension board 3 is pulled out from the installation frame 2, and the first magnetic plate 7 and the second magnetic plate 8 are fixed to each other by magnetic attraction, so that the extension board 3 can remain stable in a fixed state, and the gap reserved between the bottom of the extension board 3 and the board body 14 can ensure that the moth-proofing liquid can flow smoothly and evenly cover the wood surface.

[0033] Specifically, the control panel 15 starts the electric lifter 10, and the electric lifter 10 works to drive the lifting auxiliary rod 11 to move toward the direction of the plate body 14. During the downward pressing process, in order to prevent the pressure from causing damage to the plate body 14, the shock-absorbing damping rod 12 quickly converts the applied pressure into a buffering force, thereby effectively reducing the pressure on the plate and protecting the plate from damage.

[0034] Specifically, the control panel 15 starts the liquid delivery pump 27, which pumps the moth-proofing liquid to the inside of the liquid spray plate 20 through the L-shaped delivery pipe 19. The liquid spray plate 20 sprays the moth-proofing liquid on the surface of the board body 14. As the moth-proofing liquid is continuously injected, the liquid level in the working box 13 gradually rises until the board body 14 is completely immersed, thereby achieving all-round moth-proofing treatment.

[0035] Specifically, when the amount of liquid reaches a certain height, the flowing moth-proofing liquid touches and pushes the blocking limit rod 24, triggering its sliding in the L-shaped extension tube 22. When the blocking limit rod 24 contacts the liquid delivery pump control button 25 and the liquid extraction pump control button 26 respectively, the liquid delivery pump 27 automatically shuts down and stops delivering the moth-proofing liquid to the surface of the plate body 14. At the same time, the liquid extraction pump 28 starts working automatically. The liquid extraction pump 28 returns the moth-proofing liquid inside the working box 13 to the bottom of the working box 13 through the L-shaped reflux pipe 21, which is convenient for the recycling of the moth-proofing liquid and reduces resource consumption. In addition, the moth-proofing liquid inside the L-shaped delivery pipe 19 and the L-shaped reflux pipe 21 will be filtered through the filter plate 23, so that the moth-proofing liquid maintains a normal use effect.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0038] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A wood surface anti-moth liquid immersion treatment device, characterized in that: include: A plate clamping and fixing assembly (1) comprises a mounting frame (2), an extension plate (3), a fixing plate (5) and a buffer damping rod (9); a plate body (14) is provided below the extension plate (3); the size of the extension plate (3) is adjusted according to the size of the plate body (14) to fix the plate body (14); the extension plate (3) is arranged inside the mounting frame (2); limiting grooves (4) are respectively provided on both sides of the mounting frame (2); the fixing plate (5) is arranged inside the limiting grooves (4); a connecting block (6) is provided inside the fixing plate (5); a side wall of the connecting block (6) is fixed to a side wall of the extension plate (3); the buffer damping rod (9) is arranged inside the mounting frame (2); and one end of the buffer damping rod (9) is arranged on one side of the connecting block (6); A first magnetic plate (7) is provided on one side of the connecting block (6), and a second magnetic plate (8) adapted to the first magnetic plate (7) is provided on the inner wall of the fixing plate (5) for fixing the position of the connecting block (6) inside the fixing plate (5); The liquid delivery assembly (18) comprises an L-shaped delivery pipe (19), a liquid spraying plate (20), an L-shaped extension pipe (22) and a blocking limit rod (24), wherein the liquid spraying plate (20) is arranged at one end of the L-shaped delivery pipe (19), the blocking limit rod (24) is arranged inside the L-shaped extension pipe (22), and the liquid spraying plate (20) is located above the mounting frame (2).

2. The wood surface anti-moth liquid immersion treatment equipment according to claim 1 is characterized in that: Also includes: A working box (13), wherein a carrying plate (29) is provided inside the working box (13), the plate body (14) is arranged inside the carrying plate (29), and a filtering hole (30) is provided at the bottom of the carrying plate (29) for filtering the mothproofing liquid and facilitating the soaking of the back side of the plate body (14).

3. The wood surface anti-moth liquid immersion treatment equipment according to claim 2 is characterized in that: Electric lifters (10) are respectively provided on both sides of the working box (13); a lifting auxiliary rod (11) is provided at the working end of the electric lifter (10); one end of the lifting auxiliary rod (11) is arranged on the outer wall of the installation frame (2); a shock-absorbing damping rod (12) is provided at the bottom of the electric lifter (10); one end of the shock-absorbing damping rod (12) is arranged on the outer wall of the bearing plate (29) for buffering the pressure borne by the bearing plate (29).

4. The wood surface anti-moth liquid immersion treatment equipment according to claim 2, characterized in that: A liquid delivery pump (27) and a liquid extraction pump (28) are provided at the bottom of the working box (13); one end of the L-shaped delivery pipe (19) is provided at the working end of the liquid delivery pump (27); the working end of the liquid extraction pump (28) is provided with an L-shaped return pipe (21); the other end of the L-shaped return pipe (21) is provided at one side of the supporting plate (29) to facilitate the recovery of the moth-proofing liquid after use; one end of each of the L-shaped delivery pipe (19) and the L-shaped return pipe (21) is provided with a filter plate (23) for filtering impurities in the moth-proofing liquid.

5. The wood surface anti-moth liquid immersion treatment equipment according to claim 1, characterized in that: The L-shaped extension tube (22) is provided with two groups, and the insides of the two groups of L-shaped extension tubes (22) are respectively provided with a liquid delivery pump control button (25) and a liquid extraction pump control button (26). Under the impact of the moth-proofing liquid, the blocking limit rod (24) slides inside the L-shaped extension tube (22) to touch the liquid delivery pump control button (25) and the liquid extraction pump control button (26); The liquid delivery pump control button (25) is electrically controlled and connected to the liquid delivery pump (27) via a conductive line, and the liquid extraction pump control button (26) is electrically controlled and connected to the liquid extraction pump (28) via a conductive line.

6. The wood surface anti-moth liquid immersion treatment equipment according to claim 2, characterized in that: A control panel (15) is provided on the outer wall of the working box (13); the control panel (15) is electrically controlled and connected to the electric lifter (10) and the liquid delivery pump (27) via a conductive line.

7. The wood surface anti-moth liquid immersion treatment equipment according to claim 2, characterized in that: The four corners of the bottom surface of the working box (13) are each provided with a fixing column (16), the bottom surfaces of the four groups of the fixing columns (16) are each provided with a wear-resistant pad (17), and the bottom surfaces of the four groups of the wear-resistant pads (17) are each provided with an anti-slip pattern, so as to improve the overall stability of the device.

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