A device for protecting the copper bar end from electric shock

Abstract

The application relates to the technical field of protective devices, and discloses a device for safely protecting the electrification of copper bar end heads, which comprises a copper bar end head, a protection mechanism arranged on the copper bar end head, the protection mechanism comprising an outer left protection shell and an outer right protection shell, flexible protection sleeves connected to the inner walls of the outer left protection shell and the outer right protection shell, inner arc-shaped accommodating cavities formed in the flexible protection sleeves, and the inner arc-shaped accommodating cavities being shaped to accommodate the copper bar end heads. The device for safely protecting the electrification of copper bar end heads is provided with the protection mechanism, external physical protection is provided by the hard materials of the outer left protection shell and the outer right protection shell, the inner arc-shaped accommodating cavities and the sealed hollow cavity structure of the flexible protection sleeves are combined to realize the flexible adhesion and sealing of the copper bar end heads, the flexible supporting columns disperse the inflation pressure along the radial direction to avoid local deformation, a double-protection system is formed, and the structural stability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of protective devices, in particular to a device for safely protecting the energization of a copper bar end. BACKGROUND

[0002] A copper bar end is a key component for connecting a copper bar and an electrical device, usually in a block or tubular structure, made of high-conductivity copper material, with a tin or nickel plating surface treatment to enhance oxidation resistance and electrical conductivity. Its main function is to connect with the copper bar and the terminal of the external device through the wiring hole, realize current conduction, and protect the copper bar end from oxidation, corrosion, and mechanical damage. It is widely used in electrical energy transmission systems of high and low voltage switch cabinets, distribution boxes, transformers, and other electrical equipment.

[0003] The existing copper bar end energization protection device has the problem of difficult to balance protection performance and adaptability in structural design. The inner wall of the integrated shell made of metal or hard plastic is a fixed size plane or arc surface structure, which cannot adaptively adjust the fit according to the actual arc of the copper bar end, resulting in a gap between the shell and the end surface after installation, reducing the sealing effect of dust and moisture resistance. The protective sleeve mainly made of silicone or rubber can fit the end surface, but the material itself lacks impact strength, and is easily torn or permanently deformed by accidental impact of tools during wiring construction or equipment maintenance in the electrical cabinet, exposing the internal copper bar. This single material design flaw makes the traditional device unable to meet the dual core needs of mechanical protection and electrical insulation. SUMMARY

[0004] (I) Technical problems solved

[0005] To solve the problems of the prior art, the present application provides a device for safely protecting the energization of a copper bar end, which solves the problem of the existing copper bar end energization protection device that the protection performance and adaptability are difficult to balance due to the use of single material design, and cannot meet the needs of mechanical protection and electrical insulation.

[0006] (II) Technical solutions

[0007] In order to achieve the above object, the present application provides the following technical scheme: a device for safety protection of copper bar end head electrification, comprising: a copper bar end head, a protection mechanism is arranged on the copper bar end head, the protection mechanism comprises: an outer left protection shell and an outer right protection shell, flexible protection sleeves are connected to the inner walls of the outer left protection shell and the outer right protection shell, an inner arc type accommodating cavity is formed in the flexible protection sleeves, the shape of the inner arc type accommodating cavity is adapted to accommodate the copper bar end head, a sealed hollow cavity is formed in the inner walls of the flexible protection sleeves, so as to conveniently accommodate the copper bar end head by flexible deformation, a plurality of flexible support columns are arranged on the inner walls of the sealed hollow cavities; a connecting mechanism is arranged on the outer left protection shell and the outer right protection shell, and is used for fixing and positioning the connection of the outer left protection shell and the outer right protection shell; and an inflation mechanism is arranged on the outer left protection shell and the outer right protection shell, and is used for inflating the flexible protection sleeves in the flexible protection sleeves while the outer left protection shell and the outer right protection shell are connected.

[0008] Preferably, the connecting mechanism comprises a long strip block fixedly connected to the inner wall of the outer right protection shell, an inner sliding groove is formed in the inner wall of the outer left protection shell, the inner wall of the inner sliding groove is slidably connected with the long strip block, a plurality of limiting holes are arranged on the top of the outer left protection shell, a sliding block is slidably connected to the inner wall of the long strip block, a spring one is connected between the sliding block and the inner wall of the long strip block, one end of the spring one is fixedly connected to the inner wall of the long strip block, the other end of the spring one is fixedly connected to the sliding block, and the outer wall of the sliding block is fixedly connected with a positioning trapezoidal block.

[0009] Preferably, the inflation mechanism comprises a hollow cylinder, the hollow cylinders are respectively and symmetrically fixedly connected to the inner walls of the outer left protection shell and the outer right protection shell, pistons are connected with piston discs on the inner walls of the hollow cylinders, springs two are connected between the piston discs and the inner walls of the hollow cylinders, one end of the spring two is fixedly connected to the inner wall of the hollow cylinder, the other end of the spring two is fixedly connected to the piston disc, a connecting rod is fixedly connected between the two piston discs, a communication pipe is connected between the hollow cylinder and the flexible protection sleeve, one end of the communication pipe communicates with the inner wall of the flexible protection sleeve, and the other end of the communication pipe communicates with the inner wall of the hollow cylinder.

[0010] Preferably, the axis of the flexible support column is consistent with the radial direction of the inner arc type accommodating cavity, and the two ends of the flexible support column are integrally formed with the inner walls of the sealed hollow cavities.

[0011] Preferably, the inner walls of the outer left protection shell and the outer right protection shell are provided with positioning pins, and the outer wall of the flexible protection sleeve is provided with positioning holes matched with the positioning pins.

[0012] Preferably, the inclined surface of the positioning trapezoidal block is provided with a wear-resistant coating, and the material of the coating is polytetrafluoroethylene.

[0013] Preferably, the end of the long strip block is provided with an anti-disengagement protrusion, and the end of the inner sliding groove is provided with a stop block matched with the anti-disengagement protrusion.

[0014] Preferably, the inner wall of the hollow cylinder is provided with a ring-shaped baffle for blocking the piston disc from sliding off.

[0015] Preferably, a metal joint is arranged at the connection between the communication pipe and the flexible protective sleeve, one end of the joint is welded with the communication pipe, and the other end is embedded in the flexible protective sleeve and fixed by vulcanization.

[0016] (Three) beneficial effects

[0017] Compared with the prior art, the present application provides a device for safely protecting the energization of the end of a copper bar, which has the following beneficial effects:

[0018] 1. The device for safely protecting the energization of the end of a copper bar is provided with a protection mechanism, which provides external physical protection through the hard material of the outer left protection shell and the outer right protection shell, and realizes flexible fitting and sealing of the end of the copper bar by combining the inner arc-shaped accommodating cavity and the sealed hollow cavity structure of the flexible protective sleeve. Meanwhile, the flexible support column disperses the inflation pressure along the radial direction to avoid local deformation, forming a double protection system and improving the structural stability.

[0019] 2. The device for safely protecting the energization of the end of a copper bar is provided with a connecting mechanism, which realizes quick mechanical locking of the outer protection shell through the sliding cooperation of the long strip block and the inner sliding groove and the spring clamping structure of the positioning trapezoidal block and the limiting hole. The closed size can be adjusted by different limiting hole positions to be compatible with copper bar ends of various specifications. The wear-resistant coating of the trapezoidal block reduces friction loss, the anti-disengagement protrusion cooperates with the stop block to prevent connection failure, and the operation convenience and use safety are improved.

[0020] 3. The device for safely protecting the energization of the end of a copper bar is provided with an inflation mechanism, which pushes the piston disc to compress the gas when the protection shell is closed through the connecting rod, and realizes automatic inflation and expansion by pressing the gas into the sealed hollow cavity of the flexible protective sleeve through the communication pipe. The vulcanization fixation of the metal joint ensures the reliable gas transmission sealing, the spring two maintains the continuous gas pressure to enhance the fitting effect, and the gas automatically flows back when disassembled to make the protective sleeve shrink, realizing the unity of dynamic sealing and convenient assembly and disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the whole application;

[0022] Figure 2 It is a structural schematic diagram of the protection mechanism of the application;

[0023] Figure 3 Structure diagram of the flexible protective sleeve according to the present application;

[0024] Figure 4 Structure diagram of the outer right protective shell according to the present application;

[0025] Figure 5 Structure diagram of the outer left protective shell according to the present application;

[0026] Figure 6 Structure diagram of the long strip block according to the present application;

[0027] Figure 7 Structure diagram of the inflation mechanism according to the present application;

[0028] Figure 8 Structure diagram of the hollow cylinder according to the present application.

[0029] In the figure: 1, copper bar end; 2, protection mechanism; 21, outer left protective shell; 22, outer right protective shell; 23, flexible protective sleeve; 24, inner arc-shaped accommodating cavity; 25, sealed hollow cavity; 26, flexible support column; 3, connecting mechanism; 31, long strip block; 32, inner sliding groove; 33, limiting hole; 34, sliding block; 35, spring one; 36, positioning trapezoidal block; 4, inflation mechanism; 41, hollow cylinder; 42, piston disc; 43, spring two; 44, connecting rod; 45, communication pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] Please refer to Figures 1-8The utility model provides a device for the safety protection of copper bar end head electrification, comprising: copper bar end head 1, copper bar end head 1 is provided with protection mechanism 2, protection mechanism 2 includes: outer left protection shell 21 and outer right protection shell 22, the inner wall of outer left protection shell 21 and outer right protection shell 22 is connected with flexible protective sleeve 23, and the inner wall of flexible protective sleeve 23 is provided with inner arc type accommodating cavity 24, the shape of inner arc type accommodating cavity 24 is used for adapting to accommodate copper bar end head 1, the inner wall of flexible protective sleeve 23 is provided with sealed hollow cavity 25, to facilitate flexible deformation and accommodate copper bar end head 1, a plurality of flexible support columns 26 are arranged on the inner wall of sealed hollow cavity 25, copper bar end head 1 is aligned with the opening of the inner arc type accommodating cavity 24 of flexible protective sleeve 23, and it is slowly sleeved into the inner arc type accommodating cavity 24, in the process, the flexible deformation characteristics of sealed hollow cavity 25 are used to make flexible protective sleeve 23 closely adhere to the surface of copper bar end head 1, after confirming that copper bar end head 1 completely enters the inner arc type accommodating cavity 24, outer left protection shell 21 and outer right protection shell 22 are closed, so that the flexible protective sleeve 23 of the inner wall of both is collectively wrapped copper bar end head 1, at this time, the flexible support column 26 in sealed hollow cavity 25 can provide structural support, outer left protection shell 21 and outer right protection shell 22 are hard material, and the outside is physically protected, so as to prevent external force impact from damaging the internal flexible protective sleeve 23 and copper bar end head 1, simultaneously provide structural support for the whole protection mechanism 2, ensure that the protective sleeve and copper bar end head 1 are stably adhered, and complete protection installation;Connecting mechanism 3 is arranged on outer left protection shell 21 and outer right protection shell 22, and is used for fixing and positioning the connection of outer left protection shell 21 and outer right protection shell 22;Inflating mechanism 4 is arranged on outer left protection shell 21 and outer right protection shell 22, and is used for inflating flexible protective sleeve 23 in flexible protective sleeve 23 while the butt joint of outer left protection shell 21 and outer right protection shell 22.

[0032] The connecting mechanism 3 comprises a long block 31 fixedly connected to the inner wall of the outer right protective shell 22, an inner sliding groove 32 is formed in the inner wall of the outer left protective shell 21, the inner wall of the inner sliding groove 32 is in sliding connection with the long block 31, a plurality of limiting holes 33 are arranged at the top of the outer left protective shell 21, a sliding block 34 is in sliding connection with the inner wall of the long block 31, a spring 1 35 is connected between the sliding block 34 and the inner wall of the long block 31, one end of the spring 1 35 is fixedly connected to the inner wall of the long block 31, the other end of the spring 1 35 is fixedly connected to the sliding block 34, the outer wall of the sliding block 34 is fixedly connected with a positioning trapezoidal block 36, the outer right protective shell 22 is pushed in the direction of the inner sliding groove 32, so that the long block 31 slowly slides into the inner sliding groove 32, in the process, the inner wall of the inner sliding groove 32 extrudes the positioning trapezoidal block 36, the sliding block 34 pushes the spring 1 35 to compress, until the positioning trapezoidal block 36 is completely retracted into the long block 31, the outer right protective shell 22 is continuously pushed, when the positioning trapezoidal block 36 corresponds to the position of the limiting hole 33 at the top of the inner sliding groove 32, the spring 1 35 resets and pushes the sliding block 34, so that the positioning trapezoidal block 36 pops out and is clamped into the limiting hole 33, the mechanical locking of the outer left protective shell 21 and the outer right protective shell 22 is realized, by clamping the positioning trapezoidal block 36 into the limiting hole 33 at different positions, the relative closing position of the outer left protective shell 21 and the outer right protective shell 22 is adjusted, and the compatibility of the copper bar end 1 of different specifications is improved.

[0033] The inflating mechanism 4 comprises a hollow cylinder 41 fixedly connected to the inner walls of the outer left protective shell 21 and the outer right protective shell 22 respectively, a piston disc 42 connected to the inner wall of the hollow cylinder 41, a spring 43 connected between the piston disc 42 and the inner wall of the hollow cylinder 41, one end of the spring 43 fixedly connected to the inner wall of the hollow cylinder 41 and the other end of the spring 43 fixedly connected to the piston disc 42, a connecting rod 44 fixedly connected between the two piston discs 42, a communication pipe 45 connected between the hollow cylinder 41 and the flexible protective sleeve 23, one end of the communication pipe 45 communicated with the inner wall of the flexible protective sleeve 23 and the other end of the communication pipe 45 communicated with the inner wall of the hollow cylinder 41. After the preliminary closure of the outer left protective shell 21 and the outer right protective shell 22 is completed, the connecting rod 44 pushes the two piston discs 42 to slide inwards along the inner wall of the hollow cylinder 41 and compresses the spring 43 as the outer left protective shell 21 and the outer right protective shell 22 approach, and in the sliding process of the piston disc 42, the gas in the hollow cylinder 41 is compressed into the sealed hollow cavity 25 of the flexible protective sleeve 23 through the communication pipe 45, so as to expand the flexible protective sleeve 23 by using the gas pressure, further adhere to the surface of the copper bar end 1, and enhance the sealing and protection effect. When the outer left protective shell 21 and the outer right protective shell 22 are locked by the connecting mechanism 3, the spring 43 is in a compressed state, maintaining the gas pressure and ensuring the close contact between the flexible protective sleeve 23 and the copper bar end 1. If disassembly is needed, after the connecting mechanism 3 is loosened, the spring 43 is reset to push the piston disc 42 to slide reversely, the gas flows back to the hollow cylinder 41 through the communication pipe 45, the flexible protective sleeve 23 returns to the initial state, and the copper bar end 1 is convenient to take out.

[0034] The axis of the flexible support column 26 is consistent with the radial direction of the inner arc-shaped accommodating cavity 24, and the two ends of the flexible support column 26 are integrally formed with the inner wall of the sealed hollow cavity 25. By limiting the axial direction and the connection mode of the flexible support column 26, it is ensured that the support column can uniformly disperse the internal pressure of the flexible protective sleeve 23 when inflated in the radial direction, avoiding local deformation of the sealed hollow cavity 25. At the same time, the integrated structure enhances the connection strength of the flexible support column 26 and the sealed hollow cavity 25, prevents the support column from falling off when inflated or extruded, improves the structural stability and service life of the flexible protective sleeve 23, and the inner wall of the outer left protective shell 21 and the outer right protective shell 22 is provided with a positioning pin, and the outer wall of the flexible protective sleeve 23 is provided with a positioning hole matched with the positioning pin, so that the flexible protective sleeve 23 is accurately positioned in the outer left protective shell 21 and the outer right protective shell 22, avoiding the flexible protective sleeve 23 from being poorly fitted with the copper bar end 1 due to installation deviation or displacement during use, ensuring the wrapping and sealing of the flexible protective sleeve 23 on the copper bar end 1, and simplifying the assembly process. The slope of the positioning trapezoidal block 36 is provided with a wear-resistant coating, and the material of the coating is polytetrafluoroethylene. By setting the polytetrafluoroethylene wear-resistant coating on the slope of the positioning trapezoidal block 36, the friction loss when the positioning trapezoidal block 36 slides with the inner sliding groove 32 is reduced, and the service life of the connecting mechanism 3 is prolonged. At the same time, the low friction coefficient of polytetrafluoroethylene can reduce the sliding resistance, so that the contraction and ejection of the positioning trapezoidal block 36 are more smooth, and the operation convenience is improved. The end of the long strip block 31 is provided with an anti-falling protrusion, and the end of the inner sliding groove 32 is provided with a stop block matched with the anti-falling protrusion. By matching the anti-falling protrusion at the end of the long strip block 31 with the stop block at the end of the inner sliding groove 32, the maximum sliding stroke of the long strip block 31 in the inner sliding groove 32 is limited, preventing the long strip block 31 from being out of the inner sliding groove 32 due to excessive separation of the outer left protective shell 21 and the outer right protective shell 22. A ring-shaped baffle is arranged on the inner wall of the hollow cylinder 41 for blocking the sliding and falling of the piston disc 42. By arranging the ring-shaped baffle on the inner wall of the hollow cylinder 41, the sliding range of the piston disc 42 is limited, preventing it from falling off from the end of the cylinder under the action of the spring 43 or gas pressure, ensuring that the piston assembly of the inflation mechanism 4 always maintains a sealed state, avoiding gas leakage, ensuring the stable inflation effect of the flexible protective sleeve 23, and the connection between the communication pipe 45 and the flexible protective sleeve 23 is provided with a metal joint, one end of the joint is welded with the communication pipe 45, and the other end is embedded in the flexible protective sleeve 23 and fixed by vulcanization. The connection between the communication pipe 45 and the flexible protective sleeve 23 adopts a metal joint, which is fixed by welding and vulcanization, thereby enhancing the sealing performance and structural strength of the gas transmission path, preventing the connection from cracking or leaking due to pressure changes during inflation. At the same time, the metal joint improves the anti-deformation ability of the connection part, and adapts to the expansion and contraction cycle of the flexible protective sleeve 23.

[0035] In summary, the device for safety protection of copper bar end head, when in use, slowly sleeve the copper bar end head 1 to the inner arc type accommodating cavity 24 opening of the flexible protection sleeve 23 inner wall of the outer left protection shell 21 and the outer right protection shell 22, at this time the sealing hollow cavity 25 preliminarily adheres to the surface of the copper bar end head 1 by using the elastic deformation characteristics, and the flexible support column 26 provides basic structure support; then push the outer right protection shell 22 to the outer left protection shell 21, make the long strip block 31 in the outer right protection shell 22 inner wall slide into the inner slide groove 32 of the outer left protection shell 21, in the sliding process, the inner slide groove 32 inner wall extrudes the positioning trapezoidal block 36 slope, pushes the sliding block 34 to compress the spring one 35 to the positioning trapezoidal block 36 contraction, when the trapezoidal block aligns with the limiting hole 33, the spring one 35 resets to drive the positioning trapezoidal block 36 to be clamped into the limiting hole 33 to realize mechanical locking, in this process, the wear-resistant coating of the positioning trapezoidal block 36 reduces friction, and the anti-extrusion protrusion cooperates with the stop block to prevent the long strip block 31 from extruding; when the outer left protection shell 21 and the outer right protection shell 22 are closed, the connecting rod 44 drives the two side piston discs 42 to slide along the hollow cylinder 41 inner wall and compresses the spring two 43, the gas in the hollow cylinder 41 is pressed into the sealing hollow cavity 25 through the communication pipe 45, the gas pressure makes the flexible protection sleeve 23 expand to further adhere to the copper bar end head 1, the metal joint ensures the sealing of the connection, and the compressed state of the spring two 43 maintains the gas pressure; when in use, the outer left protection shell 21 and the outer right protection shell 22 provide physical protection, and the flexible protection sleeve 23 dynamically seals, when disassembling, press the positioning trapezoidal block 36 to separate from the limiting hole 33, the spring two 43 resets to drive the piston disc 42 to slide reversely, the gas backflow makes the flexible protection sleeve 23 contract, and the copper bar end head 1 can be taken out.

[0036] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

Claims

1. A device for safety protection when energized copper busbar ends, characterized in that: Include: The copper bar end (1) is provided with a protection mechanism (2), the protection mechanism (2) includes: The outer left protection shell (21) and the outer right protection shell (22) are connected with the flexible protective sleeve (23) on the inner wall of the outer left protection shell (21) and the outer right protection shell (22), the flexible protective sleeve (23) is provided with an inner arc type accommodating cavity (24), the shape of the inner arc type accommodating cavity (24) is used for adapting to accommodate the copper bar end (1), the inner wall of the flexible protective sleeve (23) is provided with a sealed hollow cavity (25), for facilitating flexible deformation to accommodate the copper bar end (1), a plurality of flexible support columns (26) are arranged on the inner wall of the sealed hollow cavity (25); The connecting mechanism (3) is arranged on the outer left protection shell (21) and the outer right protection shell (22), and is used for fixing and positioning the connection of the outer left protection shell (21) and the outer right protection shell (22); The inflation mechanism (4) is arranged on the outer left protection shell (21) and the outer right protection shell (22), and is used for inflating the flexible protective sleeve (23) in the flexible protective sleeve (23) while the outer left protection shell (21) and the outer right protection shell (22) are connected; The connecting mechanism (3) includes a long strip block (31), the long strip block (31) is fixedly connected to the inner wall of the outer right protection shell (22), the inner wall of the outer left protection shell (21) is provided with an inner sliding groove (32), the inner wall of the inner sliding groove (32) is slidably connected with the long strip block (31), a plurality of limiting holes (33) are arranged on the top of the outer left protection shell (21), a sliding block (34) is slidably connected to the inner wall of the long strip block (31), a spring (35) is connected between the inner wall of the sliding block (34) and the long strip block (31), one end of the spring (35) is fixedly connected to the inner wall of the long strip block (31), the other end of the spring (35) is fixedly connected to the sliding block (34), and the outer wall of the sliding block (34) is fixedly connected with a positioning trapezoidal block (36); The inflation mechanism (4) includes a hollow cylinder (41), the hollow cylinder (41) is fixedly connected to the inner wall of the outer left protection shell (21) and the outer right protection shell (22) respectively, a piston disc (42) is connected to the inner wall of the hollow cylinder (41), a spring (43) is connected between the inner wall of the hollow cylinder (41) and the piston disc (42), one end of the spring (43) is fixedly connected to the inner wall of the hollow cylinder (41), the other end of the spring (43) is fixedly connected to the piston disc (42), a connecting rod (44) is fixedly connected between the two piston discs (42), a communication pipe (45) is connected between the hollow cylinder (41) and the flexible protective sleeve (23), one end of the communication pipe (45) communicates with the inner wall of the flexible protective sleeve (23), and the other end of the communication pipe (45) communicates with the inner wall of the hollow cylinder (41).

2. The device for protecting the copper bar end from electric shock according to claim 1, characterized in that: The axis of the flexible support column (26) is consistent with the radial direction of the inner arc type accommodating cavity (24), and the two ends of the flexible support column (26) are integrally formed with the inner wall of the sealing hollow cavity (25).

3. The device for protecting the copper bar end from electric shock according to claim 2, characterized in that: The inner wall of the outer left protective shell (21) and the outer right protective shell (22) is provided with a positioning pin, and the outer wall of the flexible protective sleeve (23) is provided with a positioning hole matched with the positioning pin.

4. The device for protecting the copper bar end from electric shock according to claim 3, characterized in that: The inclined surface of the positioning trapezoidal block (36) is provided with a wear-resistant coating, and the material of the coating is polytetrafluoroethylene.

5. The device for protecting the end of the copper bar from electric shock according to claim 4, characterized in that: The end of the long strip block (31) is provided with an anti-disengagement protrusion, and the end of the inner sliding groove (32) is provided with a stop block matched with the anti-disengagement protrusion.

6. A device for protecting against electric shock at the end of a copper bar according to claim 5, characterized in that: The inner wall of the hollow cylinder (41) is provided with a ring type baffle for blocking the sliding and falling of the piston disc (42).

7. A device for protecting against electric shock at the end of a copper bar according to claim 6, characterized in that: The connecting pipe (45) and the flexible protective sleeve (23) are provided with a metal joint at the connection, one end of the joint is welded with the connecting pipe (45), and the other end is embedded into the flexible protective sleeve (23) and fixed by vulcanization.

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