A non-ferrous metal smelting impurity removal device

Abstract

The present invention relates to the technical field of non-ferrous metal smelting, and specifically to a non-ferrous metal smelting impurity removal device, the non-ferrous metal smelting impurity removal device comprising: a fixed pipe mouth, a connecting pipe, a connecting limit plate, a disassembly button, a connecting limit groove, a movable groove and a sealing member; the beneficial effects are: the connecting limit plate is supported by a connecting support spring so that the connecting limit plate cooperates with the connecting limit groove, and the adjusting limit support spring supports the adjusting limit block to enter the adjusting limit groove to limit and fix the connecting limit plate, the anti-slip spring supports the fixed pipe mouth and the connecting pipe, so that the fixed pipe mouth and the connecting pipe are installed and connected through the connecting limit plate, at this time, the protective plate is plugged into the protective groove and cooperates with the first sealing strip and the second sealing strip to seal and limit the connection between the fixed pipe mouth and the connecting pipe, the fixed pipe mouth and the connecting pipe are installed by pressing the disassembly button and the limit button, otherwise the fixed pipe mouth and the connecting pipe are disassembled, the operation is simple, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of nonferrous metal smelting, in particular to a nonferrous metal smelting impurity removal device. Background Art

[0002] Smelting is a refining technology that refers to the extraction of metals from ores by roasting, smelting, electrolysis, and the use of chemical agents; reducing impurities in metals or increasing certain components in metals to refine the required metal, including pyrometallurgy, wet metallurgy, and chemical reaction smelting.

[0003] The current hydrometallurgical process is to use acid, alkali, and salt aqueous solutions to chemically extract the required metal components from the ore, and then use various methods such as aqueous solution electrolysis to produce metals. This method is mainly used for low-grade, refractory or micro-powdered ores. Now 75% of the world's zinc and cadmium are produced by roasting-leaching-aqueous solution electrolysis, which has largely replaced the past pyrometallurgical zinc smelting. Other difficult-to-separate metals such as nickel-cobalt, zirconium-hafnium, tantalum-niobium and rare earth metals are separated by hydrometallurgical techniques such as solvent extraction or ion exchange and other new methods.

[0004] Existing hydrometallurgical electrolysis equipment requires the use of connecting pipes, and the connecting pipes are fixed by welding. After the electrolysis equipment has been used for a period of time, it is inconvenient to maintain the connecting pipes and it is inconvenient to install the connecting pipes. Summary of the invention

[0005] The purpose of the present invention is to provide a non-ferrous metal smelting impurity removal device to solve the problem that connecting pipelines are difficult to maintain.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A non-ferrous metal smelting and impurity removal device, the non-ferrous metal smelting and impurity removal device comprising:

[0008] A fixed nozzle is arranged on the surface of a non-ferrous metal smelting and impurity removal device;

[0009] A connecting pipe is arranged on the surface of a non-ferrous metal smelting and impurity removal device;

[0010] A connecting limit plate is arranged inside the fixed pipe opening;

[0011] A disassembly button, one end of which is connected to the connection limit plate, and the other end of which passes through the fixed pipe opening;

[0012] The connection limit groove is provided on the surface of the connection pipe on one side close to the fixed pipe opening;

[0013] A movable groove is provided on the surface of the fixed pipe opening close to the connecting pipe; and

[0014] A seal is provided between the fixed pipe orifice and the connecting pipe, and seals and limits the position of the fixed pipe orifice and the connecting pipe.

[0015] Preferably, the connecting limit plate is arranged inside the movable groove and has an "L" - shaped structure. The cross - section of the connecting limit groove is in an "L" - shaped structure, and the cross - section of the movable groove is in a "匚" - shaped structure.

[0016] Preferably, the width of the connecting limit groove is equal to the width of the movable groove and both are greater than the thickness of the connecting limit plate. The sum of the length of the connecting limit groove and the length of the movable groove is equal to the length of the connecting limit plate.

[0017] Preferably, a connecting holding groove is formed on the surface of the movable groove. A connecting holding spring is arranged inside the connecting holding groove. The cross - section of the connecting holding groove is in a "匚" - shaped structure. One end of the connecting holding spring is connected to the innermost surface of the connecting holding groove, and the other end is connected to the end of the connecting limit plate away from the disassembly button. And the connecting holding spring is always in a compressed state.

[0018] Preferably, anti - detachment grooves are formed on the surfaces of the connecting limit groove and the movable groove close to the disassembly button. The anti - detachment grooves are in a ring - shaped structure, and anti - detachment springs are arranged inside the anti - detachment grooves. One end of the anti - detachment spring is connected to the connecting pipe. When the connecting pipe is connected to the fixed pipe orifice, the anti - detachment spring is in a compressed state.

[0019] Preferably, the guiding and limiting sliding groove is formed in the center of the innermost surface of the movable groove. A guiding and limiting sliding block is fixedly arranged in the center of the side surface of the connecting limit plate. The guiding and limiting sliding block is located inside the guiding and limiting sliding groove. The cross - section of the guiding and limiting sliding block and the guiding and limiting sliding groove is in a "T" - shaped structure. The guiding and limiting sliding block and the guiding and limiting sliding groove cooperate to limit the position of the connecting limit plate.

[0020] Preferably, the seal includes a protection groove, a protection plate matching the protection groove, a sealing groove, a first sealing strip and a second sealing strip. The protection groove is formed on the surface of the connecting pipe, and the protection plate is fixed on the surface of the fixed pipe orifice. Both the protection groove and the protection plate are in a ring - shaped structure, and there are two sets of the protection groove and the protection plate. The connecting limit plate, the movable groove, the connecting limit groove, the anti - detachment spring and the anti - detachment groove are all arranged between the two sets of protection grooves and protection plates. The sealing groove is formed on both side surfaces of the protection groove. The first sealing strip is fixed on the surface of the sealing groove. There are multiple sets of the sealing groove and the first sealing strip. One set of the first sealing strip cooperates with the two sets of the first sealing strips to seal the fixed pipe orifice and the connecting pipe. And second sealing strips are arranged on both the outer and inner surfaces of the protection plate, and the second sealing strips are linearly distributed.

[0021] Preferably, a pressing groove is formed on the surface of the disassembly button. The cross-section of the pressing groove is in a "C" shape. A pressing spring and a limiting button are arranged inside the pressing groove. One end of the pressing spring is connected to the pressing groove, and the other end is connected to the limiting button. The end of the limiting button away from the pressing spring extends out of the disassembly button.

[0022] Preferably, an adjusting limiting groove is formed on the surface of the connecting limiting groove, and an adjusting limiting abutting groove is formed on the surface of the connecting limiting plate. The cross-sections of the adjusting limiting groove and the adjusting limiting abutting groove are both in a "C" shape. An adjusting limiting abutting spring and an adjusting limiting block are arranged inside the adjusting limiting abutting groove. One end of the adjusting limiting abutting spring is connected to the adjusting limiting abutting groove, and the other end is connected to the adjusting limiting block. The adjusting limiting abutting spring is always in a compressed state.

[0023] Preferably, traction fixing grooves are formed on both side surfaces of the pressing groove. The cross-section of the traction fixing groove is in a "C" shape. A traction rope is arranged inside the traction fixing groove. One end of the traction rope is connected to the limiting button, and the other end passes through the disassembly button and the connecting limiting plate and is connected to the adjusting limiting block.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] In the present invention, by pressing the disassembly button and the limiting button inward, the connecting limiting plate is driven to press inward. Then, the connecting limiting plate is inserted into the connecting limiting groove. Then, the disassembly button is released. At this time, the limiting button presses towards the pressing spring, thereby tightening the traction rope. The adjusting limiting block is pulled into the adjusting limiting abutting groove through the traction rope. The limiting button and the disassembly button are released. Then, the connecting abutting spring abuts the connecting limiting plate so that the connecting limiting plate cooperates with the connecting limiting groove. And the adjusting limiting abutting spring abuts the adjusting limiting block into the adjusting limiting groove to limit and fix the connecting limiting plate. The anti-detachment spring abuts and fixes the fixed pipe orifice and the connecting pipe. Thus, the fixed pipe orifice and the connecting pipe are installed and connected through the connecting limiting plate. At this time, the protective plate is inserted into the protective groove and cooperates with the first sealing strip and the second sealing strip to seal and limit the connection part of the fixed pipe orifice and the connecting pipe. The fixed pipe orifice and the connecting pipe are installed by pressing the disassembly button and the limiting button. On the contrary, the fixed pipe orifice and the connecting pipe are disassembled. The operation is simple, and the maintenance efficiency is improved. Brief Description of the Drawings

[0026] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 is a three-dimensional structural schematic diagram of the fixed pipe orifice and the connecting pipe of the present invention;

[0028] Figure 3 is a cross-sectional three-dimensional structural schematic diagram of the fixed pipe orifice and the connecting pipe of the present invention;

[0029] Figure 4 for Figure 3 A magnified schematic diagram of the structure at position A;

[0030] Figure 5 It is a partial cross-sectional three-dimensional structural schematic diagram of the disassembly button of the present invention;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the connecting pipe of the present invention;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the fixed pipe mouth of the present invention.

[0033] In the figure: non-ferrous metal smelting impurity removal device 1, fixed pipe mouth 2, disassembly button 3, connecting pipe 4, limit button 5, connecting limit plate 6, connecting limit groove 7, connecting top holding groove 8, connecting top holding spring 9, movable groove 10, anti-slip spring 11, anti-slip groove 12, protective groove 13, protective plate 14, sealing groove 15, first sealing strip 16, guide limit slider 17, guide limit slide groove 18, second sealing strip 19, pressing groove 20, pressing spring 21, adjusting limit groove 22, adjusting limit block 23, adjusting limit top holding groove 24, adjusting limit top holding spring 25, traction rope 26, traction fixed groove 27. DETAILED DESCRIPTION

[0034] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] For the sake of simplicity and illustration, the principles of the embodiments are mainly described by referring to examples. In the following description, many specific details are set forth to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures are not described in detail to avoid unnecessarily obscuring these embodiments. Additionally, all embodiments can be used in combination with each other.

[0038] Please refer to Figures 1 to 7 , the present invention provides a technical solution:

[0039] A non-ferrous metal smelting impurity removal device, the non-ferrous metal smelting impurity removal device includes: a fixed pipe orifice 2, arranged on the surface of the non-ferrous metal smelting impurity removal device 1; a connecting pipe 4, arranged on the surface of the non-ferrous metal smelting impurity removal device 1; a connecting limit plate 6, arranged inside the fixed pipe orifice 2; a disassembly button 3, one end of which is connected to the connecting limit plate 6 and the other end passes through the fixed pipe orifice 2 and is arranged outside; a connecting limit groove 7, opened on the surface of the connecting pipe 4 close to the fixed pipe orifice 2; a movable groove 10, opened on the surface of the fixed pipe orifice 2 close to the connecting pipe 4; and a seal, arranged between the fixed pipe orifice 2 and the connecting pipe 4 and sealing and limiting the fixed pipe orifice 2 and the connecting pipe 4; the connecting limit plate 6 is arranged inside the movable groove 10 and has an "L" - shaped structure, the cross - section of the connecting limit groove 7 is in an "L" - shaped structure, and the cross - section of the movable groove 10 is in a "匚" - shaped structure.

[0040] The present invention can be further arranged such that the width of the connecting limit groove 7 is equal to the width of the movable groove 10 and both are greater than the thickness of the connecting limit plate 6, and the length of the connecting limit groove 7 plus the length of the movable groove 10 is equal to the length of the connecting limit plate 6; a connecting holding groove 8 is opened on the surface of the movable groove 10, a connecting holding spring 9 is arranged inside the connecting holding groove 8, the cross - section of the connecting holding groove 8 is in a "匚" - shaped structure, one end of the connecting holding spring 9 is connected to the innermost surface of the connecting holding groove 8, the other end is connected to the end of the connecting limit plate 6 away from the disassembly button 3, and the connecting holding spring 9 is always in a compressed state.

[0041] The present invention can be further configured such that an anti - detachment groove 12 is provided on the surface of the connection limiting groove 7 and the movable groove 10 near the disassembly button 3. The anti - detachment groove 12 is in an annular structure, and an anti - detachment spring 11 is arranged inside the anti - detachment groove 12. One end of the anti - detachment spring 11 is connected to the connecting pipe 4. When the connecting pipe 4 is connected to the fixed pipe orifice 2, the anti - detachment spring 11 is in a compressed state. The guiding and limiting sliding groove 18 is provided in the middle of the innermost surface of the movable groove 10. A guiding and limiting sliding block 17 is fixedly arranged in the middle of the side surface of the connection limiting plate 6. The guiding and limiting sliding block 17 is located inside the guiding and limiting sliding groove 18, and the cross - section of the guiding and limiting sliding block 17 and the guiding and limiting sliding groove 18 is in a "T" - shaped structure. The guiding and limiting sliding block 17 and the guiding and limiting sliding groove 18 cooperate to limit the connection limiting plate 6.

[0042] The present invention can be further configured such that the sealing member includes a protection groove 13, a protection plate 14 cooperating with the protection groove 13, a sealing groove 15, a first sealing strip 16, and a second sealing strip 19. The protection groove 13 is provided on the surface of the connecting pipe 4, and the protection plate 14 is fixed on the surface of the fixed pipe orifice 2. Both the protection groove 13 and the protection plate 14 are in an annular structure, and both the protection groove 13 and the protection plate 14 are provided in two groups. The connection limiting plate 6, the movable groove 10, the connection limiting groove 7, the anti - detachment spring 11, and the anti - detachment groove 12 are all arranged between the two groups of protection grooves 13 and protection plates 14. The sealing groove 15 is provided on both side surfaces of the protection groove 13, and the first sealing strip 16 is fixed on the surface of the sealing groove 15. The sealing groove 15 and the first sealing strip 16 are provided in multiple groups, and one group of first sealing strips 16 and two groups of first sealing strips 16 cooperate to seal the fixed pipe orifice 2 and the connecting pipe 4. Second sealing strips 19 are provided on both the outer and inner surfaces of the protection plate 14, and the second sealing strips 19 are linearly distributed. A pressing groove 20 is provided on the surface of the disassembly button 3. The cross - section of the pressing groove 20 is in a "匚" - shaped structure, and a pressing spring 21 and a limit button 5 are arranged inside the pressing groove 20. One end of the pressing spring 21 is connected to the pressing groove 20, and the other end is connected to the limit button 5. The end of the limit button 5 away from the pressing spring 21 extends out of the disassembly button 3.

[0043] The present invention can be further configured such that an adjustment limiting groove 22 is provided on the surface of the connection limiting groove 7, and an adjustment limiting holding groove 24 is provided on the surface of the connection limiting plate 6. The cross - sections of both the adjustment limiting groove 22 and the adjustment limiting holding groove 24 are in a "匚" - shaped structure. An adjustment limiting holding spring 25 and an adjustment limiting block 23 are arranged inside the adjustment limiting holding groove 24. One end of the adjustment limiting holding spring 25 is connected to the adjustment limiting holding groove 24, and the other end is connected to the adjustment limiting block 23. The adjustment limiting holding spring 25 is always in a compressed state. Traction fixing grooves 27 are provided on both side surfaces of the pressing groove 20. The cross - section of the traction fixing groove 27 is in a "匚" - shaped structure, and a traction rope 26 is arranged inside the traction fixing groove 27. One end of the traction rope 26 is connected to the limit button 5, and the other end passes through the disassembly button 3 and the connection limiting plate 6 and is connected to the adjustment limiting block 23.

[0044] During installation, first press the disassembly button 3 and the limit button 5 inward to drive the connection limit plate 6 to be pressed inward, then insert the connection limit plate 6 into the connection limit groove 7, and then release the disassembly button 3. At this time, the limit button 5 is pressed toward the pressing spring 21, thereby tightening the traction rope 26, and the adjustment limit block 23 is pulled into the adjustment limit holding groove 24 through the traction rope 26. The limit button 5 and the disassembly button 3 are released, and then the connection holding spring 9 supports the connection limit plate 6 so that the connection limit plate 6 cooperates with the connection limit groove 7, and the adjustment limit holding spring 25 is pressed against the connection limit plate 6. The adjusting limit block 23 is held and enters the adjusting limit groove 22 to limit and fix the connecting limit plate 6, and the anti-dropping spring 11 supports the fixed pipe mouth 2 and the connecting pipe 4, so that the fixed pipe mouth 2 and the connecting pipe 4 are installed and connected through the connecting limit plate 6. At this time, the protective plate 14 is inserted into the protective groove 13 and cooperates with the first sealing strip 16 and the second sealing strip 19 to seal and limit the connection between the fixed pipe mouth 2 and the connecting pipe 4. The fixed pipe mouth 2 and the connecting pipe 4 are installed by pressing the disassembly button 3 and the limit button 5, and vice versa, the fixed pipe mouth 2 and the connecting pipe 4 are disassembled. The operation is simple and the maintenance efficiency is improved.

[0045] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A non-ferrous metal smelting impurity removal device, characterized in that: The non-ferrous metal smelting impurity removal device includes: A fixed pipe orifice (2), arranged on the surface of the non-ferrous metal smelting impurity removal device (1); A connecting pipe (4), arranged on the surface of the non-ferrous metal smelting impurity removal device (1); A connecting limit plate (6), arranged inside the fixed pipe orifice (2); A disassembly button (3), one end of which is connected to the connecting limit plate (6), and the other end passes through the fixed pipe orifice (2) and is arranged; A connecting limit groove (7), opened on the surface of the connecting pipe (4) close to the fixed pipe orifice (2); A movable groove (10), opened on the surface of the fixed pipe orifice (2) close to the connecting pipe (4); and A seal, arranged between the fixed pipe orifice (2) and the connecting pipe (4), and sealing and limiting the fixed pipe orifice (2) and the connecting pipe (4).

2. The non-ferrous metal smelting impurity removal device according to claim 1, characterized in that: The connecting limit plate (6) is arranged inside the movable groove (10) and has an "L" - shaped structure. The cross-section of the connecting limit groove (7) is in an "L" - shaped structure, and the cross-section of the movable groove (10) is in a "匚" - shaped structure.

3. The non-ferrous metal smelting impurity removal device according to claim 2, characterized in that: The width of the connecting limit groove (7) is equal to the width of the movable groove (10) and both are greater than the thickness of the connecting limit plate (6). The length of the connecting limit groove (7) plus the length of the movable groove (10) is equal to the length of the connecting limit plate (6).

4. The non-ferrous metal smelting impurity removal device according to claim 3, characterized in that: A connecting holding groove (8) is opened on the surface of the movable groove (10). A connecting holding spring (9) is arranged inside the connecting holding groove (8). The cross-section of the connecting holding groove (8) is in a "匚" - shaped structure. One end of the connecting holding spring (9) is connected to the innermost surface of the connecting holding groove (8), and the other end is connected to the end of the connecting limit plate (6) far from the disassembly button (3), and the connecting holding spring (9) is always in a compressed state.

5. The non-ferrous metal smelting impurity removal device according to claim 4, characterized in that: An anti - detachment groove (12) is opened on the surface of the connecting limit groove (7) and the movable groove (10) close to the disassembly button (3). The anti - detachment groove (12) is in an annular structure, and an anti - detachment spring (11) is arranged inside the anti - detachment groove (12). One end of the anti - detachment spring (11) is connected to the connecting pipe (4). When the connecting pipe (4) is connected to the fixed pipe orifice (2), the anti - detachment spring (11) is in a compressed state.

6. The non-ferrous metal smelting impurity removal device according to claim 5, characterized in that: A guiding limit sliding groove (18) is opened in the center of the innermost surface of the movable groove (10). A guiding limit sliding block (17) is fixedly arranged in the center of the side surface of the connecting limit plate (6). The guiding limit sliding block (17) is located inside the guiding limit sliding groove (18). The cross - section of the guiding limit sliding block (17) and the guiding limit sliding groove (18) is in a "T" - shaped structure. The guiding limit sliding block (17) and the guiding limit sliding groove (18) cooperate to limit the connecting limit plate (6).

7. The non-ferrous metal smelting impurity removal device according to claim 6, characterized in that: The seal includes a protective groove (13), a protective plate (14) mating with the protective groove (13), a sealing groove (15), a first sealing strip (16), and a second sealing strip (19). The protective groove (13) is formed on the surface of the connecting pipe (4), and the protective plate (14) is fixed on the surface of the fixed pipe orifice (2). Both the protective groove (13) and the protective plate (14) are of annular structure, and there are two sets of the protective groove (13) and the protective plate (14). The connecting limit plate (6), the movable groove (10), the connecting limit groove (7), the anti-disengagement spring (11), and the anti-disengagement groove (12) are all arranged between the two sets of the protective groove (13) and the protective plate (14). The sealing groove (15) is formed on both side surfaces of the protective groove (13), and the first sealing strip (16) is fixed on the surface of the sealing groove (15). There are multiple sets of the sealing groove (15) and the first sealing strip (16), and one set of the first sealing strip (16) cooperates with the two sets of the first sealing strip (16) to seal the fixed pipe orifice (2) and the connecting pipe (4). The second sealing strip (19) is arranged on both the outer and inner surfaces of the protective plate (14), and the second sealing strip (19) is linearly distributed.

8. The non-ferrous metal smelting impurity removal device according to claim 7, characterized in that: A pressing groove (20) is formed on the surface of the disassembly button (3). The cross-section of the pressing groove (20) is in a "C"-shaped structure. A pressing spring (21) and a limit button (5) are arranged inside the pressing groove (20). One end of the pressing spring (21) is connected to the pressing groove (20), and the other end is connected to the limit button (5). The end of the limit button (5) away from the pressing spring (21) extends out of the disassembly button (3).

9. The non-ferrous metal smelting impurity removal device according to claim 8, characterized in that: An adjustment limit groove (22) is formed on the surface of the connecting limit groove (7), and an adjustment limit holding groove (24) is formed on the surface of the connecting limit plate (6). The cross-sections of both the adjustment limit groove (22) and the adjustment limit holding groove (24) are in a "C"-shaped structure. An adjustment limit holding spring (25) and an adjustment limit block (23) are arranged inside the adjustment limit holding groove (24). One end of the adjustment limit holding spring (25) is connected to the adjustment limit holding groove (24), and the other end is connected to the adjustment limit block (23). The adjustment limit holding spring (25) is always in a compressed state.

10. The non-ferrous metal smelting impurity removal device according to claim 9, characterized in that: Traction fixing grooves (27) are formed on both side surfaces of the pressing groove (20). The cross-section of the traction fixing groove (27) is in a "C"-shaped structure. A traction rope (26) is arranged inside the traction fixing groove (27). One end of the traction rope (26) is connected to the limit button (5), and the other end passes through the disassembly button (3) and the connecting limit plate (6) and is connected to the adjustment limit block (23).

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