Fracture test device

Abstract

The utility model discloses a fracture test device, and the device comprises a support which is used for being connected with the bottom of a pole to fix the pole, and is provided with an opening; the connecting rod assembly is connected with the insulating pull rod of the pole to drive the insulating pull rod to move; the connecting rod assembly penetrates through the opening and is connected with the handle, the handle is arranged to be movable, and the handle moves to drive the connecting rod assembly so that the insulating pull rod can move in the direction away from the pole to break the arc extinguish chamber of the pole. According to the application, the connecting rod assembly is used for connecting the insulating pull rod of the pole, the handle can move to drive the connecting rod assembly to move, and finally the insulating pull rod moves to the arc extinguish chamber for disconnecting the pole. According to the invention, the purpose of disconnecting the pole arc extinguish chamber can be achieved through linkage cooperation between the connecting rod assembly and the handle. According to the arrangement of the invention, an operator only needs to operate the handle to realize disconnection of the arc extinguish chamber, and the operation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fracture test, in particular to a fracture test device. BACKGROUND

[0002] The circuit breaker plays a crucial role in the power system, its main function is to detect and cut off abnormal current such as overload and short circuit, to ensure the safe and stable operation of the power system. The core structure of the circuit breaker includes the pole column, which is the key component to bear current and perform breaking operation. The pole column usually contains conductive parts, insulation parts and arc extinguishing devices, etc.

[0003] In the power-off operation, the pole column is responsible for physically disconnecting the circuit and effectively controlling the generation and extinction of arc during the process. Since the arc can cause great damage to the insulation performance and mechanical structure of the equipment, the pole column must have excellent arc extinction ability and reliable insulation recovery performance.

[0004] To verify the performance of the circuit breaker pole column, the pole column fracture test is usually needed. This test mainly tests whether the pole column can quickly and effectively extinguish the arc during the breaking process and recover to a safe insulation state. These test results will directly affect the reliability and service life of the circuit breaker, so the fracture test of the pole column is a key step to ensure the quality and safety of the circuit breaker. CONTENT OF THE INVENTION

[0005] To solve the above technical problems, the present application provides a fracture test device.

[0006] The present application is realized by the following technical solutions.

[0007] The present application provides a fracture test device, which comprises: a support for connecting with the bottom of the pole column to fix the pole column, the support is provided with an opening; a connecting rod assembly connected with the insulation pull rod of the pole column to drive the insulation pull rod to move; and a handle, the connecting rod assembly passes through the opening and is connected with the handle, the handle is set to be movable, wherein the handle drives the connecting rod assembly to move the insulation pull rod towards the direction away from the pole column to disconnect the arc chamber of the pole column by moving.

[0008] In some exemplary embodiments, the connecting rod assembly comprises: a first connecting rod for connecting with the insulation pull rod of the pole column to drive the insulation pull rod to move; a second connecting rod connected with the first connecting rod.

[0009] In some example embodiments, the handle comprises a connecting portion connected with the second connecting rod, and a rotating portion comprising a first portion and a second portion extending from both sides of the first portion to the connecting portion, the second portion being connected with the connecting portion, wherein the extending direction of the second portion is different from the extending direction of the connecting portion, and the second connecting rod is moved upward by rotating the rotating portion upward in the direction of gravity.

[0010] In some example embodiments, a first end of the connecting portion close to the rotating portion is rotationally connected with the second connecting rod, and a second end of the connecting portion away from the rotating portion is connected with the support; in the extending direction of the second connecting rod, the length of the second connecting rod is shorter than the length of the support.

[0011] In some example embodiments, when the handle is rotated to disconnect the arc-extinguishing chamber of the pole, the first portion is above the first connecting rod.

[0012] In some example embodiments, the first connecting rod is arranged through the opening.

[0013] In some example embodiments, the support comprises a bent portion comprising a top portion above the pole in the direction of gravity and side portions connected with both sides of the top portion, and the opening is located in the side portion.

[0014] In some example embodiments, the second connecting rod is located at one side of the side portion, and the second connecting rod is arranged between the side portion of the support and the handle.

[0015] In some example embodiments, the fracture test device comprises a fixing member for fixing the position of the handle to keep the arc-extinguishing chamber of the pole disconnected when the handle is rotated to disconnect the arc-extinguishing chamber of the pole.

[0016] In some example embodiments, the support is provided with a first through hole, and the handle is provided with a second through hole, wherein when the handle is rotated to disconnect the arc-extinguishing chamber of the pole, the first through hole and the second through hole are aligned, and the fixing member passes through the first through hole and the second through hole to fix the handle.

[0017] In some example embodiments, the fracture test device comprises a support plate comprising a first surface and a second surface arranged oppositely, the handle is located on the first surface, and the second surface is used to arrange the pole, wherein the support plate comprises a support through hole, and the support passes through the support through hole to be detachably fixed with the bottom of the pole.

[0018] In some example embodiments, a support platform is arranged on the side of the support through hole, and the support platform is used for placing the pole; and the second surface is provided with a support column.

[0019] In some example embodiments, the handle is detachably connected with the second connecting rod by bolt connection, stud connection or screw connection.

[0020] In some example embodiments, the bracket is formed by detachable connection of a first bracket and a second bracket, and the first bracket and the second bracket overlap at the top of the bracket; and / or the handle is formed by detachable connection of a first handle and a second handle, and the first handle and the second handle overlap at the top of the handle.

[0021] Through the present application, the connecting rod assembly is used for connecting the insulating pull rod of the pole, the handle can be moved to drive the connecting rod assembly to move, and finally the insulating pull rod is moved to disconnect the arc extinguishing chamber of the pole. The present application can realize the purpose of disconnecting the arc extinguishing chamber of the pole by the linkage cooperation between the connecting rod assembly and the handle. The present application only needs to operate the handle to realize the disconnection of the arc extinguishing chamber, which is convenient for operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments, and are not meant to limit the present application. Moreover, the same reference numerals in the drawings indicate the same or similar elements. In the drawings:

[0023] Figure 1 A structural schematic diagram of a fracture test device provided for some embodiments of the present application is shown in the figure;

[0024] Figure 2 A structural schematic diagram of a fracture test device provided for some embodiments of the present application is shown in the figure;

[0025] Figure 3 A structural schematic diagram of a fracture test device and a pole provided for some embodiments of the present application is shown in the figure;

[0026] Figure 4 A structural schematic diagram of a support plate of a fracture test device provided for some embodiments of the present application is shown in the figure;

[0027] Figure 5 A structural schematic diagram of a fracture test device in a disconnected arc extinguishing chamber state provided for some embodiments of the present application is shown in the figure.

[0028] Explanation of reference numerals:

[0029] 1 breaking test device; 10 support; 11 first support; 12 second support; 101 opening; 102 bending part; 103 first through hole; 121 top; 122 side; 20 first connecting rod; 30 second connecting rod; 40 handle; 401 second through hole; 402 first handle; 403 second handle; 41 connecting part; 42 rotating part; 421 first part; 422 second part; 423 first end; 424 second end; 425 first rotating connection point; 426 second rotating connection point; 50 pole column; 51 insulating pull rod; 70 support plate; 71 first face; 72 second face; 73 support through hole; 74 support column; x first direction. DETAILED DESCRIPTION

[0030] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0031] The circuit breaker plays a crucial role in the power system, and its main function is to detect and cut off abnormal currents such as overload and short circuit, ensuring the safe and stable operation of the power system. The core structure of the circuit breaker includes the pole column, which is the key component that carries current and performs breaking operation. The pole column usually contains conductive parts, insulating parts, and arc extinguishing devices, etc.

[0032] In the breaking operation, the pole column is responsible for physically disconnecting the circuit and effectively controlling the generation and extinction of the arc during this process. Since the arc can cause great damage to the insulation performance and mechanical structure of the equipment, the pole column must have excellent arc extinction ability and reliable insulation recovery performance.

[0033] To verify the performance of the circuit breaker pole column, a breaking test of the pole column is usually required. This test mainly tests whether the pole column can quickly and effectively extinguish the arc during breaking and recover to a safe insulation state. The test results will directly affect the reliability and service life of the circuit breaker, so the breaking test of the pole column is a key step to ensure the quality and safety of the circuit breaker.

[0034] To solve the above technical problems, the present application provides a breaking test device.

[0035] The breaking test device provided by the present application comprises a support for connecting with the bottom of the pole column to fix the pole column, the support being provided with an opening; a connecting rod assembly connected with the insulating pull rod of the pole column to drive the insulating pull rod to move; and a handle, the connecting rod assembly being connected with the handle through the opening, and the handle being movable, wherein the handle drives the connecting rod assembly to move the insulating pull rod towards the direction away from the pole column to disconnect the arc extinguishing chamber of the pole column by moving.

[0036] By the application, the connecting rod assembly is used to connect the insulating pull rod of the pole, the handle can be moved to drive the connecting rod assembly to move, and finally the insulating pull rod is moved to the arc extinguishing chamber of the disconnected pole. The application can realize the purpose of disconnecting the arc extinguishing chamber of the pole by the linkage between the connecting rod assembly and the handle. The application is provided, and the operator only needs to operate the handle to realize the disconnection of the arc extinguishing chamber, which is convenient to operate.

[0037] Figure 1 The structural schematic diagram of the fracture test device provided for some embodiments of the application is shown in the figure. Figure 2 The structural schematic diagram of the fracture test device provided for some embodiments of the application is shown in the figure. Figure 3 The structural schematic diagram of the fracture test device and the pole provided for some embodiments of the application is shown in the figure.

[0038] As shown in the figure, Figures 1 to 3 The fracture test device 1 of the application includes a support 10, a connecting rod assembly and a handle 40. The support 10 is used to be connected with the bottom of the pole 50 to fix the pole 50. The connecting rod assembly can include a first connecting rod 20 and a second connecting rod 30. The first connecting rod 20 is used to connect the insulating pull rod 51 of the pole 50, and the second connecting rod 30 is connected with the first connecting rod 20. The handle 40 is connected with the second connecting rod 30, and the handle 40 is arranged to be movable. Through the movement of the handle 40, the second connecting rod 30 and the first connecting rod 20 are sequentially driven to move, so that the insulating pull rod 51 moves towards the direction away from the pole 50 to disconnect the arc extinguishing chamber of the pole 50.

[0039] In some exemplary embodiments provided by the application, the handle 40 can be arranged to be rotatable, as shown in the figure, Figure 1 The handle 40 can be rotated along the first direction x.

[0040] As shown in the figures, Figure 1 and Figure 2 The handle 40 can include a connecting portion 41 and a rotating portion 42, the connecting portion 41 and the rotating portion 42 are connected, and the connecting portion 41 and the second connecting rod 30 are connected. The rotating portion 42 includes a first portion 421 and a second portion 422, the second portion 422 extends from both sides of the first portion 421 to the connecting portion 41, and the second portion 422 and the connecting portion 41 are connected.

[0041] As shown in the figures, Figure 1 and Figure 2As shown, the extending direction of the second part 422 is different from the extending direction of the connecting part 41, and through such arrangement, a bending point is formed between the second part 422 and the connecting part 41. Due to the existence of the bending point, the second part 422 and the connecting part 41 are misaligned, which is beneficial to realize the rotation of the handle 40 along the first direction x. For example, a straight handle without a bending point can only be lifted upward to realize the disconnection of the arc extinguishing chamber. However, in the present application, due to the different extending directions of the second part 422 and the connecting part 41, a good force arm is provided, and the arc extinguishing chamber can be disconnected by rotating the handle 40. Compared with lifting upward, the rotating mode requires less force and is convenient for the operator to operate. Moreover, the operation is more stable during the rotation of the handle 40.

[0042] Figure 5 The structure of the fracture test device provided for some embodiments of the present application in the disconnected arc extinguishing chamber state is intended to be as shown in Figure 5 As shown, when the handle 40 is rotated to the disconnected pole arc extinguishing chamber, the first part 421 is located above the first connecting rod 20. In some embodiments, the first part 421 can be located directly above the first connecting rod 20 in the direction of gravity, but the present application is not limited thereto, and in some embodiments, the first part 421 can be located obliquely above the first connecting rod 20 in the direction of gravity.

[0043] As shown in Figure 1 and Figure 2 The second part 422 extends from both sides of the first part 421 to the connecting part 41, and the first part 421 and the second parts 422 on both sides form a “U” shaped structure. The “U” shape is inverted and connected to the second connecting rod 30, and the space in the middle of the “U” shape can be used to accommodate the first connecting rod 20, the second connecting rod 30 and other structures. Such arrangement makes the first part 421 can be used as the holding part or the force applying part of the operator.

[0044] In some embodiments, the handle 40 can be formed by detachable connection of the first handle 402 and the second handle 403, and the first handle 402 and the second handle 403 can overlap at the top of the handle 40. The overlapping position of the first handle 402 and the second handle 403 can correspond to the first part 421. Such overlapping arrangement makes the first part 421 have high thickness and high strength. In the operation process, the first part 421 is usually the position where the operator applies force or holds, and the high thickness and high strength of the first part 421 are beneficial to force and improve the stability of the entire device.

[0045] In some embodiments, the first handle 402 and the second handle 403 can be detachably connected by bolt connection, stud connection or screw connection at a position where the two overlap. Through the detachable arrangement, on the one hand, the handle 40 can be convenient for assembly, manufacture, and also convenient for disassembly; on the other hand, such a handle 40 can also be suitable for different models of the pole. For example, in some embodiments, the first handle 402 and the second handle 403 can overlap by A part, and in other embodiments, the first handle 402 and the second handle 403 can overlap by B part, wherein the sizes of the A part and the B part can be different to be suitable for different poles.

[0046] In some example embodiments provided in the present application, as shown in Figures 1 to 3 The bracket 10 is provided with an opening 101, and the first connecting rod 20 can be arranged through the opening 101. The arrangement of the opening 101 combines the bracket 10 and the first connecting rod 20 together, on the one hand, which is conducive to realizing the linkage between the various components in the fracture test device 1, for example, the first connecting rod 20 can be fixedly connected or rotatably connected with the second connecting rod 30 through the opening; on the other hand, the first connecting rod 20 can be limited through the opening 101 of the bracket 10.

[0047] In some example embodiments provided in the present application, as shown in Figure 1 and Figure 2 The handle 40 is rotatably connected with the second connecting rod 30. The handle 40 has a connecting portion 41 and a rotating portion 42 connected with each other, and a first end 423 close to the rotating portion 42 of the connecting portion 41 is rotatably connected with the second connecting rod 30. Here, the first end 423 close to the rotating portion 42 refers to the vicinity of the connection between the connecting portion 41 and the rotating portion 42. The handle 40 is rotatably connected with the second connecting rod 30 at the first end 423, which is conducive to driving the second connecting rod 30 to rotate when the handle 40 rotates. The handle 40 rotates around the first rotation connection point 425 between the handle 40 and the second connecting rod 30.

[0048] As shown in Figure 1 and Figure 2 The second end 424 of the connecting portion 41 away from the rotating portion 42 is connected with the bracket 10, and the bracket 10 and the handle 40 can be rotatably connected at a second rotation connection point 426. In the extension direction of the second connecting rod 30, the length of the second connecting rod 30 is shorter than the length of the bracket 10. Specifically, the length of the second connecting rod 30 is shorter than the length of the side portion 122 of the bracket 10. Such an arrangement can realize that when the handle 40 rotates upward (above the bracket 10) around the rotation connection point, the second connecting rod 30 is driven to move upward under the limiting action of the opening 101, and in turn the first connecting rod 20 is driven to move upward, so that the insulating pull rod 51 moves away from the pole 50 to disconnect the arc-extinguishing chamber of the pole 50.

[0049] In some example embodiments provided in the present application, as shown in Figures 1 to 3 The bracket 10 can include a bending part 102, which can include a top part 121 above the pole 50 in the direction of gravity and side parts 122 connected to both sides of the top part 121, and the opening 101 can be located in the side parts 122.

[0050] In some example embodiments provided in the present application, as shown in Figure 1 The bracket 10 can be formed by detachable connection of a first bracket 11 and a second bracket 12, and the first bracket 11 and the second bracket 12 overlap at the top of the bracket 10. Such an overlapping arrangement makes the overlapping part thick and strong, which is beneficial to improve the stability of the entire device.

[0051] In some embodiments, the first bracket 11 and the second bracket 12 can be detachably connected by bolt connection, stud connection or screw connection at the position where they overlap. Through the detachable arrangement, on the one hand, the bracket 10 can be convenient for assembly, manufacturing, and also convenient for disassembly; on the other hand, such a bracket 10 can also be suitable for different models of poles. For example, in some embodiments, the first bracket 11 and the second bracket 12 can overlap a part, and in other embodiments, the first bracket 11 and the second bracket 12 can overlap another part, wherein the size of the part and the another part can be different to achieve suitability for different poles.

[0052] In some example embodiments provided in the present application, as shown in Figure 5 The breaking test device 1 can include a fixing part for fixing the position of the handle 40 to keep the arc extinguishing chamber of the pole 50 in a disconnected state when the handle 40 is rotated to disconnect the arc extinguishing chamber of the pole.

[0053] In some example embodiments provided in the present application, the bracket 10 is provided with a first through hole 103, and the handle is provided with a second through hole 401. When the handle 40 is rotated to disconnect the arc extinguishing chamber of the pole 50, the first through hole 103 and the second through hole 401 can be aligned, and the fixing part can pass through the first through hole 103 and the second through hole 401 to fix the handle 40.

[0054] Through the arrangement of the fixing part, the existing position of the handle 40 can be kept when the arc extinguishing chamber is disconnected, avoiding the sudden reclosing of the handle 40 due to unstable factors. The arrangement of the fixing part is beneficial to the stability of the breaking test device 1 during the breaking test process.

[0055] In some example embodiments provided in the present application, as shown in Figure 3 and Figure 4As shown, the fracture testing device 1 can include a support plate 70, which can include a first face 71 and a second face 72 arranged oppositely. The handle 40 can be located on the first face 71, and the second face 72 is used to arrange the pole 50. The support plate 70 can include a support through hole 73, and the bracket 10 can be detachably fixed to the bottom of the pole 50 through the support through hole 73.

[0056] As shown in Figure 3 and Figure 4 , the support through hole 73 can be provided with a support table 75 for arranging the pole 50.

[0057] As shown in Figures 1 to 3 , the bracket 10 can be in the shape of a U, and the middle of the U can be a bending part 102, and the two sides of the U can be used to connect the support plate 70. For example, the two sides of the U can be detachably connected by bolt connection, stud connection or screw connection.

[0058] In some example embodiments provided in the present application, as shown in Figure 3 and Figure 4 , the second face 72 can be provided with a support column 74. The support column 74 can be used to support the support plate 70.

[0059] In some example embodiments provided in the present application, as shown in Figures 1 to 3 , the second connecting rod 30 can be located on one side of the side, and the second connecting rod is arranged between the side of the bracket and the handle. The second connecting rod 30 can be long strip-shaped.

[0060] In some example embodiments provided in the present application, the handle 40 and the second connecting rod 30 can be detachably connected by bolt connection, stud connection or screw connection. Through the detachable arrangement, on the one hand, the handle 40 and the second connecting rod 30 can be convenient for assembly, manufacturing, and also convenient for disassembly; on the other hand, such handle 40 and second connecting rod 30 can also be suitable for different models of poles. For example, in some embodiments, the handle 40 and the second connecting rod 30 can overlap E part, and in some other embodiments, the handle 40 and the second connecting rod 30 can overlap F part, wherein the sizes of the E part and the F part can be different to be suitable for different poles.

[0061] Through the present application, the first connecting rod, the insulating pull rod for connecting the pole, the handle can be moved to drive the second connecting rod and the first connecting rod to move, and finally realize the movement of the insulating pull rod to the arc extinguishing chamber of the pole. The present application can realize the purpose of disconnecting the arc extinguishing chamber of the pole by the linkage cooperation between the first connecting rod, the second connecting rod and the handle. The arrangement of the present application can realize the disconnection of the arc extinguishing chamber by only operating the handle, which is convenient for operation.

[0062] The application can pull out the arc-extinguishing chamber in the pole by simple rotating operation through the design of the rotatable handle. The U-shaped structure of the rotating handle provides a good force arm, so that the operation is labor-saving and efficient. The structure of the fracture test device is relatively simple, mainly composed of several key components, facilitating manufacturing and assembly. At the same time, the connection mode between the components is simple and easy to operate, which is beneficial to the on-site quick installation and disassembly of the technical personnel, and improves the work efficiency.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the terms "include" and "comprise", and variations thereof, as used in concurring with the description and claims of this application, are intended to be inclusive in a manner similar to the term "comprising" and / or "including" as such terms are used in the art.

[0064] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0065] In this paper, the phrase "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. The skilled person understands explicitly and implicitly that the embodiments described herein can be combined with other embodiments.

[0066] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents the "or" relationship between the front and rear associated objects.

[0067] In the description of the embodiments of the present application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed in a particular orientation, be operated or used, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0068] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixedly" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through intervening medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0069] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the technical term "contact" should be understood broadly, which can be direct contact, or contact through an intermediate medium layer, can be contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

[0070] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fracture testing apparatus, characterized by, The device comprises: a bracket for connecting with the bottom of the pole to fix the pole, the bracket being provided with an opening; a connecting rod assembly for connecting with the insulating pull rod of the pole to drive the insulating pull rod to move; and a handle, the connecting rod assembly being connected with the handle through the opening, the handle being arranged to be movable, wherein the handle drives the connecting rod assembly to move by moving, so that the insulating pull rod moves towards a direction away from the pole to disconnect the arc chamber of the pole.

2. The device according to claim 1, wherein the connecting rod assembly comprises: a first connecting rod for connecting with the insulating pull rod of the pole to drive the insulating pull rod to move; and a second connecting rod connected with the first connecting rod.

3. The device according to claim 2, wherein the handle comprises: a connecting portion connected with the second connecting rod; and a rotating portion, the rotating portion comprising a first portion and a second portion extending from both sides of the first portion to the connecting portion, the second portion being connected with the connecting portion, wherein the extending direction of the second portion is different from the extending direction of the connecting portion, the second connecting rod is driven to move upwards by rotating the rotating portion upwards in the direction of gravity.

4. The device according to claim 3, wherein a first end of the connecting portion close to the rotating portion is rotationally connected with the second connecting rod, and a second end of the connecting portion away from the rotating portion is connected with the bracket; in the extending direction of the second connecting rod, the length of the second connecting rod is shorter than the length of the bracket.

5. The device according to claim 2, wherein the first connecting rod is arranged through the opening.

6. The device according to claim 5, wherein the bracket comprises a bending portion, the bending portion comprising a top portion located above the pole in the direction of gravity and side portions connected with both sides of the top portion, the opening being located in the side portions.

7. The device according to claim 6, wherein the second connecting rod is located at one side of the side portions, and the second connecting rod is arranged between the side portions of the bracket and the handle.

8. The device according to claim 1, wherein the device comprises a fixing member for fixing the position of the handle to keep the arc chamber of the pole disconnected when the handle is rotated to disconnect the arc chamber of the pole.

9. The device according to claim 8, wherein the bracket is provided with a first through hole, and the handle is provided with a second through hole, wherein when the handle is rotated to disconnect the arc chamber of the pole, the first through hole and the second through hole are aligned, and the fixing member passes through the first through hole and the second through hole to fix the handle.

10. The device according to claim 2, wherein the handle is detachably connected with the second connecting rod by bolt connection, stud connection or screw connection.

11. The device according to claim 6, wherein ​ The bracket is formed by detachable connection of a first bracket and a second bracket, the first bracket and the second bracket overlapping at the top of the bracket; and / or, The handle is formed by detachable connection of a first handle and a second handle, the first handle and the second handle overlapping at the top of the handle.

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