Contact opening device

Abstract

The present application relates to the field of vacuum arc chamber detection technology, and in particular to a contact pulling device, comprising: a mounting frame, on which a workbench is provided; a lifting assembly, used to drive the contact to lift; a pulling piece, rotatably connected to the mounting frame, the pulling piece being configured to have at least a first crank arm and a second crank arm, the first crank arm being connected to the second crank arm, the first crank arm being used to contact the lifting assembly, the second crank arm being used to push a gasket toward one side of the lifting assembly, so that while the lifting assembly pushes the first crank arm upward, the second crank arm can push the gasket toward one side of the lifting assembly. The present application can realize the automatic pulling apart of contacts in a vacuum arc chamber and the automatic insertion of gaskets, which helps to save manpower and improve work efficiency, and can also ensure the vertical lifting of contacts and minimize the wear of contacts.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum interrupter detection, and particularly to a contact opening device. Background Art

[0002] A vacuum interrupter, also known as a vacuum switch tube, is a core component of medium and high voltage power switches. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit cuts off the power through the excellent insulation of the vacuum inside the tube, avoiding accidents and unexpected situations. It is mainly applied to the power transmission and distribution control system, and also applied to the distribution systems such as metallurgy, mining, petroleum, chemical industry, railway, broadcasting, communication, and industrial high-frequency heating. It has the characteristics of energy saving, material saving, fire prevention, explosion prevention, small volume, long life, low maintenance cost, reliable operation, and no pollution. As a core component of a vacuum circuit breaker, during the production process, the contacts of the vacuum interrupter need to be subjected to an aging process treatment and a power frequency withstand voltage test. In this process, a special tooling is required to open the contacts of the vacuum interrupter, so that there is a certain opening distance between the moving and static contacts, and then a gasket is used to support and fix it, and then a certain voltage is applied for testing.

[0003] Currently, the existing contact opening device is made using the lever principle. A metal hook is installed at one end of the lever, and a handle with a certain length is provided at the other end for applying pressure during use. When in use, first, the support cylinder is sleeved into the moving conducting rod of the vacuum interrupter, then a connecting screw rod with threads at one end and a radial hole and an adjusting piece screwed at the other end is screwed into the moving conducting rod of the vacuum interrupter, the adjusting piece is rotated to be close to the end face of the sleeve, then the metal hook is hooked into the hole at one end of the connecting screw rod, and then the handle of the lever is pressed by hand. After the moving conducting rod is pulled open to the required height, a gasket is inserted into the gap between the adjusting piece and the end face of the sleeve, and then the contacts are tested. However, during installation, it is necessary to manually hook the metal hook into the hole of the connecting mold and then press the handle of the lever. When the number of products is large, employees are prone to fatigue; due to the lever principle, when the moving conducting rod is pulled open and retracted, it is not vertically up and down, resulting in non-planar contact of the contacts and easy damage to the surface of the contacts; due to manually inserting the gasket, the efficiency is low. Summary of the Invention

[0004] Based on this, in view of the problem that the existing contact opening device is labor-consuming and easy to damage the surface of the contacts, it is necessary to provide a contact opening device.

[0005] According to one aspect of the present application, a contact opening device is provided, including:

[0006] A mounting frame, on which a workbench is provided;

[0007] A lifting assembly for driving the contacts to lift;

[0008] The pulling member is rotatably connected to the mounting bracket. The pulling member is configured to have at least a first crank arm and a second crank arm. The first crank arm is connected to the second crank arm. The first crank arm is used to contact the lifting assembly, and the second crank arm is used to push the spacer towards the lifting assembly, so that while the lifting assembly pushes the first crank arm upward, the second crank arm can push the spacer towards the lifting assembly.

[0009] In one embodiment, a plurality of mounting holes are formed in the mounting bracket. The mounting holes are arranged at vertical intervals along the mounting bracket. Each mounting hole is used for mounting the pulling member to adjust the height of the pulling member.

[0010] In one embodiment, the lifting assembly includes a lifting screw, an adjusting piece and an electromagnet. The lifting screw is used to connect the contact head. The adjusting piece is arranged on the lifting screw. The electromagnet is mounted on the mounting bracket. The electromagnet is used to attract the adjusting piece to make the lifting screw rise and strike the first crank arm.

[0011] In one embodiment, a support cylinder is further included. The support cylinder is sleeved on the vacuum interrupter. The support cylinder is used to support the spacer so that the spacer supports the adjusting piece.

[0012] In one embodiment, a first contact disc is coaxially provided on the end face of the first crank arm, and a second contact disc is coaxially arranged on the end face of the second crank arm.

[0013] In one embodiment, a spacer collection box is arranged on the workbench. The spacer collection box is arranged between the lifting assembly and the second crank arm. The spacers are stacked in the spacer collection box.

[0014] In one embodiment, a pushing assembly is arranged on the workbench. One end of the pushing assembly contacts the spacer, and the other end contacts the second crank arm.

[0015] In one embodiment, the pushing assembly includes a sleeve and a moving rod. The sleeve is mounted on the workbench. A pushing cavity is formed in the sleeve. The moving rod is inserted into the pushing cavity. One end of the moving rod contacts the spacer, and the other end contacts the second crank arm.

[0016] In one embodiment, the pushing assembly further includes an elastic member. The elastic member is sleeved on the moving rod. A limiting piece is arranged on the moving rod. One end of the elastic member contacts the limiting piece, and the other end contacts the inner wall of the pushing cavity.

[0017] In one of the embodiments, a positioning platform is provided at the bottom of the mounting bracket, and a positioning component for positioning the vacuum interrupter is provided on the positioning platform.

[0018] In the above-mentioned contact opening device, by providing a lifting component which drives the lifting screw rod to lift, and providing a pulling component, the pulling component can be driven to deflect during the upward movement of the lifting screw rod. At the same time, the pulling component can push the gasket, and the gasket can keep the lifting screw rod in the pulled-open position, so as to realize the automatic opening of the contacts in the vacuum interrupter and the automatic insertion of the gasket, which helps to save labor and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0020] Figure 2 It is a schematic diagram of the structure of the pulling component in the embodiment of the present application.

[0021] Figure 3 is Figure 2 the enlarged view of part A in

[0022] Figure 4 It is a schematic diagram of the structure after the lifting component rises in the embodiment of the present application.

[0023] DESCRIPTION OF THE REFERENCE NUMERALS:

[0024] 10. Mounting bracket; 110. Workbench; 120. Positioning platform; 130. Support platform; 140. Mounting hole; 20. Vacuum interrupter; 200. Lifting component; 210. Support cylinder; 220. Moving conductor bar; 230. Lifting screw rod; 240. Adjusting piece; 30. Electromagnet; 310. Lifting hole; 40. Pulling component; 410. First crank arm; 420. Second crank arm; 430. Third crank arm; 440. First contact disk; 450. Second contact disk; 50. Gasket collection box; 510. Gasket; 520. Pushing groove; 60. Pushing component; 600. Pushing cavity; 610. Sleeve; 620. Moving rod; 630. Elastic member; 640. Limiting piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, the following detailed description of the specific embodiments of the present application will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if there are such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0027] In addition, if there are such terms as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is the term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0028] In the present application, unless otherwise clearly defined and limited, if there are such terms as "mounted", "connected", "coupled", "fixed", etc., these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0031] The vacuum interrupter, also known as the vacuum switch tube, is the core component of medium and high voltage power switches. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit cuts off the power through the excellent insulation of the vacuum inside the tube, avoiding accidents and unexpected situations. It is mainly applied to the power transmission and distribution control system, and also applied to the distribution systems such as metallurgy, mines, petroleum, chemical industry, railways, broadcasting, communication, and industrial high-frequency heating. The vacuum interrupter includes a housing, a fixed contact and a moving contact disposed inside the housing. As the core component of the vacuum circuit breaker, during the production process, the contacts need to be subjected to an aging process treatment and a power frequency withstand voltage test. In this process, a special tooling is required to pull open the contacts of the vacuum interrupter, so that there is a certain opening distance between the fixed and moving contacts, and then use a gasket to support and make it fixed, and then apply a certain voltage for detection.

[0032] Currently, the existing contact pulling device is made using the lever principle. A metal hook is installed at one end of the lever, and at the other end, for easy application of pressure during use, there is a handle with a certain length. During use, first, the support cylinder is sleeved into the moving conductive rod of the vacuum interrupter, then a connecting screw rod with threads at one end and a radial hole and an adjusting piece screwed at the other end is screwed into the moving conductive rod of the vacuum interrupter. The adjusting piece is rotated until it is close to the end face of the sleeve, then the metal hook is hooked into the hole at one end of the connecting screw rod, and then the handle of the lever is pressed by hand. After the moving conductive rod is pulled open to the required height, a gasket is inserted into the gap between the adjusting piece and the end face of the sleeve, and then the contacts are detected. However, during installation, it is necessary to manually hook the metal hook into the hole of the connecting die and then press the handle of the lever. When the number of products is large, employees are prone to fatigue; due to the use of the lever principle, when the moving conductive rod is pulled open and retracted, it is not vertically up and down, resulting in non-planar contact between the contacts and easy damage to the surface of the contacts; due to manual insertion of the gasket, the efficiency is low.

[0033] To this end, the present application provides a contact opening device. After the contact opening device enables a certain distance to be opened between the static contact and the moving contact, it can keep the open distance between the static contact and the moving contact for a period of time, and can solve the problems brought by the existing opening devices. The structure of the contact opening device in the present application will be described below. This embodiment is only used as an example and will not limit the technical scope of the present application. It can be understood that in other embodiments, the contact opening device is not limited to opening and positioning the contacts, and can also perform opening processing on other structures to be detected, which will not be limited here.

[0034] Refer to Figure 1 , Figure 1 FIG. shows a schematic structural diagram of a contact opening device in an embodiment of the present application. The contact opening device provided in an embodiment of the present application includes a mounting frame 10. A workbench 110 is fixed on the mounting frame 10. The workbench 110 is horizontally arranged. A positioning table 120 is provided at the bottom of the workbench 110. A positioning component (not shown in the figure) for positioning the vacuum interrupter 20 is provided on the positioning table 120. The positioning component can be a clamping structure such as a clamping jaw or a clamping block, which will not be elaborated here. The contact opening device further includes a lifting component 200. The lifting component 200 includes a lifting screw 230, an adjusting piece 240, and an electromagnet 30. The lifting screw 230 is threadedly connected to the moving conductive rod of the vacuum interrupter 20. The adjusting piece 240 is threadedly connected to the lifting screw 230. A support cylinder 210 is installed on the vacuum interrupter 20. In the initial state, the adjusting piece 240 is in contact with the upper end surface of the support cylinder 210. After the support cylinder 210 and the lifting screw 230 are installed on the vacuum interrupter 20, the vacuum interrupter 20 is transported to the lower part of the workbench 110 through a conveying device (not shown in the figure). The conveying device can be rail conveying, belt conveying, chain conveying, etc., which will not be elaborated here.

[0035] Refer to Figure 1 , a support platform 130 is fixed on the positioning table 120. The electromagnet 30 is fixed on the support platform 130. The electromagnet 30 has a lifting hole 310 inside, that is, the electromagnet 30 is an annular electromagnet. The lifting hole 310 is used for the lifting screw 230 to pass through. When the electromagnet 30 is energized, the adjusting piece 240 can be attracted and lifted, thereby driving the lifting screw 230 and the moving conductive rod 220 to rise, so that the static contact and the moving contact are opened by a certain distance. By the way that the electromagnet 30 attracts the adjusting piece 240, the lifting screw 230, and the moving conductive rod 220 to rise, it can ensure that the moving conductive rod 220 rises vertically, thereby being able to avoid contact wear as much as possible and playing a certain protective role for the contacts. After the static contact and the moving contact are opened by a certain distance, it is necessary to keep the static contact and the moving contact in the open state for a period of time to detect the static contact and / or the moving contact.

[0036] Refer to Figure 1, for this purpose, a pulling member 40 is provided on the mounting frame 10. The pulling member 40 can, while the lifting screw rod 230 rises, insert a gasket 510 into the gap between the adjusting piece 240 and the support cylinder 210 to support the adjusting piece 240, the lifting screw rod 230, and the moving conductive rod 220, so as to maintain a separation distance between the static contact and the moving contact. The pulling member 40 can realize the automatic insertion of the gasket 510, thereby saving manpower, improving the insertion efficiency of the gasket 510, and further improving the detection efficiency.

[0037] Refer to Figure 1 , the pulling member 40 is hinged on the mounting frame 10. A plurality of mounting holes 140 are provided on the mounting frame 10. The mounting holes 140 are arranged vertically at intervals along the mounting frame 10. The pulling member 40 is hinged in the mounting holes 140. The pulling member 40 can be hinged in the mounting holes 140 at different heights, so as to realize the adjustment of the height of the pulling member 40 to adapt to vacuum interrupters 20 of different sizes and heights, and improve the applicability of the contact pulling device.

[0038] Refer to Figure 1 and Figure 2 , specifically, the pulling member 40 is realized through the following structure. The pulling member 40 has a first crank arm 410, a second crank arm 420, and a third crank arm 430. The first crank arm 410, the second crank arm 420, and the third crank arm 430 are integrally formed. The first crank arm 410, the second crank arm 420, and the third crank arm 430 are formed by bending a round tube twice. It can be understood that in other embodiments, the pulling member 40 can also be formed by bending a square tube, a cylindrical tube, or other polygonal tubes or polygonal columns, which is not limited herein. The connection point between the first crank arm 410 and the third crank arm 430 is the hinge point between the pulling member 40 and the mounting frame 10. One end of the third crank arm 430 is connected to the first crank arm 410, and the other end is connected to the second crank arm 420. In the initial state, the second crank arm 420 is horizontally arranged, and the end face of the second crank arm 420 faces the support cylinder 210, and the end face of the first crank arm 410 faces the electromagnet 30.

[0039] Furthermore, a gasket collection box 50 and a pushing assembly 60 are provided on the workbench 110. The gasket collection box 50 is arranged between the second crank arm 420 and the support cylinder 210, and the pushing assembly 60 is arranged between the gasket collection box 50 and the second crank arm 420. A plurality of gaskets 510 can be stored in the gasket collection box 50, and the plurality of gaskets 510 are stacked in the gasket collection box 50. A pushing groove 520 is opened at the bottom of the gasket collection box 50. The pushing groove 520 is opened in the horizontal direction. The pushing groove 520 can allow the pushing assembly 60 to enter the gasket collection box 50 and push the gasket 510 towards the support cylinder 210 side to push the gasket 510 onto the support cylinder 210, so that the gasket 510 supports the adjusting piece 240, thereby ensuring the separation distance between the moving contact and the static contact.

[0040] Refer to Figure 1 and Figure 3 Figure 3 , the pushing component 60 includes a sleeve 610, a moving rod 620 and an elastic member 630. The sleeve 610 is fixed on the workbench 110. There is a pushing cavity inside the sleeve 610. The moving rod 620 is inserted into the pushing cavity. The moving rod 620 can slide inside the sleeve 610. One end of the moving rod 620 contacts the gasket 510, and the other end contacts the end face of the second crank arm 420. There is a limiting piece 640 on the moving rod 620. The cross-sectional area of the limiting piece 640 is larger than that of the moving rod 620. The elastic member 630 is arranged in the pushing cavity 600 and sleeved on the moving rod 620. One end of the elastic member 630 contacts the limiting piece 640, and the other end contacts the inner wall of the pushing cavity. The elastic member 630 is specifically a spring in this embodiment, and can also be other materials such as a rubber sleeve in other embodiments, which is not limited herein. By setting the spring, when the moving rod 620 pushes the gasket 510, the limiting piece 640 pushes the elastic member 630 to compress. After the gasket 510 is pushed to the target position, the elastic member 630 resets, and the moving rod 620 resets under the reset action of the elastic member 630, facilitating the next pushing operation. After the moving rod 620 resets, the gasket 510 in the gasket collection box 50 falls onto the workbench 110 under its own gravity, that is, the automatic feeding of the gasket 510 can be realized, facilitating the next pushing operation.

[0041] Refer to Figure 1 and Figure 2 Figure 2 , further, in order to ensure the contact and pushing effect between the first crank arm 410 and the lifting screw 230, a first contact disc 440 can be arranged on the end face of the first crank arm 410 facing the lifting screw 230. The diameter of the first contact disc 440 is larger than that of the first crank arm 410, so as to increase the contact area between the first crank arm 410 and the lifting screw 230, and ensure that during the rising process of the lifting screw 230, the lifting screw 230 can always contact the first crank arm 410. Combining Figure 3 Figure 3 , similarly, a second contact disc 450 is arranged on the end face of the second crank arm 420 facing the gasket collection box 50. The diameter of the second contact disc 450 is larger than that of the second crank arm 420, so as to increase the contact area between the second crank arm 420 and the moving rod 620, and ensure that during the deflection process of the pulling member 40, the second crank arm 420 can always contact the moving rod 620, ensuring the pushing effect on the gasket 510.

[0042] In this embodiment, the axes of the first crank arm 410, the second crank arm 420 and the third crank arm 430 can form an isosceles triangle. In the initial state, the stability of the isosceles triangle can be ensured by controlling the weight of the first crank arm 410, the second crank arm 420 and the third crank arm 430, so that the second crank arm 420 is in a horizontal state. It can be understood that the pull-out member 40 can also be formed by connecting multiple sections of separate straight tubes, cylinders, or polygonal cylinders. For example, the first crank arm 410 is a section of cylindrical tube, the second crank arm 420 is a section of cylindrical tube, and the third crank arm 430 is also a section of cylindrical tube. One end of the third crank arm 430 is fixedly connected or hinged to the first crank arm 410, and the other end is fixedly connected or hinged to the second crank arm 420. It is not limited to being formed by bending a tube. By hingedly connecting the three ends of the tubes, it is convenient to adjust the angle between the first crank arm 410 and the third crank arm 430 and the angle between the second crank arm 420 and the third crank arm 430, thereby enhancing the applicability of the contact pulling device. In some embodiments, the third crank arm 430 can also be composed of multiple sections of columns, and it is only necessary to realize the linkage between the lifting screw 230 and the pushing assembly 60, and the specific structure of the pulling member 40 is not limited.

[0043] The implementation principle of this embodiment is as follows: first, the support tube 210 is installed on the vacuum interrupter 20, the lifting screw 230 is screwed into the movable conductive rod 220, the adjustment plate 240 is screwed on the lifting screw 230, and then the vacuum interrupter 20 is transported to the bottom of the pull-out member 40 through the conveying device. The pull-out member 40 is hinged on the mounting frame 10, and the height of the pull-out member 40 can be adjusted according to the height of the vacuum interrupter 20. Then, the electromagnet 30 is energized, and the combination Figure 4 , Figure 4 The schematic diagram is a structural diagram of the electromagnet 30 attracting the adjusting piece 240 to rise after being energized. After being energized, the electromagnet 30 attracts the adjusting piece 240 to rise, and the adjusting piece 240 drives the lifting screw 230 to rise. The lifting screw 230 touches the end face of the first crank arm 410, causing the first crank arm 410 to deflect clockwise around the hinge point. At the same time, the end face of the second crank arm 420 moves toward the side close to the pushing assembly 60, and the second crank arm 420 hits the moving rod 620. The moving rod 620 pushes the gasket 510 out of the gasket collecting box 50 and pushes it into the gap between the adjusting piece 240 and the supporting tube 210 to support the adjusting piece 240, thereby maintaining a certain opening distance between the static contact and the moving contact, which is convenient for detecting the contacts.

[0044] After the electromagnet 30 is powered off, the electromagnet 30 loses connection with the adjusting piece 240, and the lifting screw 230, the movable conductive rod 220 and the adjusting piece 240 can be reset under the action of their own gravity. At the same time, the elastic member 630 is reset, and the elastic member 630 pushes the moving rod 620 to reset, and the moving rod 620 pushes the second crank arm 420, so that the pull-out member 40 is also restored to a balanced state, which is convenient for the next pushing operation. By pushing the gasket 510 by the pull-out member 40, the gasket 510 can be automatically installed, saving manpower and helping to improve work efficiency. In addition, it can ensure that the movable conductive rod 220 is vertically moved up and down when being pulled open and closed, and the contact is avoided as much as possible from being worn.

[0045] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A contact opening device, characterized in that, Comprising: A mounting bracket, on which a workbench is provided; A lifting assembly for driving the contact to lift; A pulling member rotatably connected to the mounting bracket, the pulling member being configured to have at least a first crank arm and a second crank arm, the first crank arm being connected to the second crank arm, the first crank arm being used to contact the lifting assembly, and the second crank arm being used to push a gasket towards the lifting assembly side, so that while the lifting assembly pushes the first crank arm upwards, the second crank arm can push the gasket towards the lifting assembly side; The lifting assembly includes a lifting screw rod, an adjusting piece and an electromagnet. The lifting screw rod is used to connect the contact. The adjusting piece is arranged on the lifting screw rod. The electromagnet is installed on the mounting bracket. The electromagnet is used to attract the adjusting piece to make the lifting screw rod rise and strike the first crank arm; A support cylinder, which is used to sleeve the vacuum interrupter, and the support cylinder is used to support the gasket so that the gasket supports the adjusting piece; A pushing assembly is arranged on the workbench. One end of the pushing assembly contacts the gasket, and the other end contacts the second crank arm.

2. The contact opening device according to claim 1, characterized in that, A plurality of mounting holes are formed in the mounting bracket, and the mounting holes are arranged vertically at intervals along the mounting bracket. Each mounting hole is used for mounting the pulling member to adjust the height of the pulling member.

3. The contact opening device according to claim 1, characterized in that, A first contact disc is coaxially provided on the end surface of the first crank arm, and a second contact disc is coaxially arranged on the end surface of the second crank arm.

4. The contact opening device according to claim 1, characterized in that A gasket collection box is arranged on the workbench, and the gasket collection box is arranged between the lifting assembly and the second crank arm. The gaskets are stacked in the gasket collection box.

5. The contact opening device according to claim 1, characterized in that, The pushing assembly includes a sleeve and a moving rod. The sleeve is installed on the workbench. A pushing cavity is formed in the sleeve. The moving rod is arranged in the pushing cavity. One end of the moving rod contacts the gasket, and the other end contacts the second crank arm.

6. The contact opening device according to claim 5, characterized in that, The pushing assembly further includes an elastic member. The elastic member is sleeved on the moving rod. A limiting piece is arranged on the moving rod. One end of the elastic member contacts the limiting piece, and the other end contacts the inner wall of the pushing cavity.

7. The contact opening device according to claim 1, characterized in that, A positioning table is arranged at the bottom of the mounting bracket, and a positioning assembly for positioning the vacuum interrupter is arranged on the positioning table.

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