Universal circuit breaker for high-voltage breaking and contact structure thereof
By designing a universal circuit breaker contact structure composed of multiple moving contacts, combined with the arc starting seat and arc starting angle on the static contact, the problem of poor arc extinguishing effect under high voltage is solved and a more efficient arc is achieved. Extinguishing effect.
Patent Information
- Application Number
- CN202421137740.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-22
AI Technical Summary
Existing universal circuit breakers are difficult to effectively extinguish arcs at high voltages, resulting in poor arc extinguishing effect.
A universal circuit breaker contact structure for high voltage breaking is designed, which is composed of multiple movable contacts. The length of the movable contact in the middle of the arc extinguishing chamber is longer than that on both sides. The static contact is equipped with an arc ignition seat and The arc striking angle forms a tip discharge effect, guiding the arc into the arc extinguishing chamber and accelerating its extinguishing.
Through this design, the arc extinguishing effect of the arc formed between the movable contact and the static contact is significantly improved, and the performance of the circuit breaker under high voltage conditions is enhanced.
Smart Images
Figure CN222380482U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of a universal circuit breaker, and in particular to a universal circuit breaker for high voltage disconnection and a contact structure thereof. Background Art
[0002] The universal circuit breakers commonly seen on the market currently generally have a maximum operating voltage of AC690V or AC800V. However, with customer demand, especially the fierce competition in the new energy industry market, various large-capacity related products have emerged, and the energy density is getting higher and higher. As a result, the maximum operating voltage of universal circuit breakers has been increased to AC1500V. For circuit breaker manufacturers, how to modify and upgrade the existing circuit breaker structure and quickly meet market demand on the basis of limited time and cost has become an important work direction. The ability of universal circuit breakers to safely and quickly break large currents in the event of a short-circuit fault with large current in the circuit is the guarantee that universal circuit breakers can provide protection for upper and lower load lines and operators in actual working environments. During the upgrade of the working voltage of the universal circuit breaker, the arc generated in the universal circuit breaker expands exponentially.
[0003] The related technology provides an arc extinguishing structure of a circuit breaker, including a moving contact, a stationary contact and an arc extinguishing device. The arc extinguishing device is arranged opposite to the moving contact. The arc extinguishing device includes an arc extinguishing piece. The arc formed between the moving contact and the stationary contact is extinguished by the arc extinguishing device. The arc extinguishing piece is rectangular as a whole. The moving contact rotates along the arrangement direction of the arc extinguishing piece. When the arc formed between the moving contact and the stationary contact deviates to one side of the arc extinguishing device, the arc cannot effectively enter the arc extinguishing device, resulting in poor arc extinguishing effect. Utility Model Content
[0004] In order to improve the arc extinguishing effect of the arc formed between the moving contact and the stationary contact, the present application provides a universal circuit breaker for high voltage disconnection and a contact structure thereof.
[0005] The present application provides a universal circuit breaker contact structure for high voltage disconnection, which adopts the following technical solution:
[0006] A contact structure of a universal circuit breaker for high voltage disconnection, comprising a moving contact and a stationary contact, wherein the moving contact is opened and closed by approaching or moving away from the stationary contact, an arc extinguishing device is provided on one side of the moving contact and the stationary contact, the arc extinguishing device is used to extinguish the arc formed by the movement of the moving contact, the middle part of the arc extinguishing device is recessed in a direction away from the moving contact and the stationary contact to form an arc extinguishing chamber, the middle of the arc extinguishing chamber is the highest, and the two sides gradually decrease, the end of the moving contact close to the arc extinguishing chamber is a contact end, the moving contacts are formed as a group for electrical connection with the same stationary contact, the length of the moving contact in the middle of the arc extinguishing chamber is greater than the length of the moving contacts on both sides of the arc extinguishing chamber, the stationary contact is provided with an arc striking seat, and the upper part of the arc striking seat is provided with an arc striking angle extending toward the arc extinguishing chamber.
[0007] By adopting the above technical scheme, when in use, an arc will be formed in the process of the moving contact approaching or separating from the static contact. When the formed arc is formed on multiple moving contacts, the length of the multiple moving contacts in the middle of the arc extinguishing chamber is greater than the length on both sides of the arc extinguishing chamber. At the same time, the arc striking seat arranged on the static contact also extends with an arc striking angle. By using the effect of tip discharge, the formed arc is guided to the middle part of the arc extinguishing chamber. Due to the lower position of both sides of the arc extinguishing chamber, the arc can be placed in the arc extinguishing chamber. At the same time, due to the effect of the middle moving contact and the arc striking angle, the arc can be extinguished by the arc extinguishing chamber more quickly, thereby improving the arc extinguishing effect of the arc formed between the moving contact and the static contact.
[0008] Preferably, the arc extinguishing device includes an insulating shell and an arc extinguishing grid, the insulating shell includes two side plates, the two side plates are parallel to the movement trajectory of the moving contact, and the opposite surfaces of the two side plates are provided with slots, the arc extinguishing grid is fitted in the slots, and the arc extinguishing grid is perpendicular to the side plates and vertically arranged.
[0009] By adopting the above technical solution, the arc extinguishing grid is installed through the clamping groove on the side plate, so that the position of the arc extinguishing grid is fixed, and the arc extinguishing grid is kept at a certain distance through the clamping groove to stabilize the arc extinguishing grid.
[0010] Preferably, the arc extinguishing grid is provided with a first notch, a second notch and a third notch, the first notch is located in the middle of one side of the arc extinguishing, the first notches of multiple arc extinguishing grids form the arc extinguishing chamber, the second notch is located at the bottom of the first notch and deviates from the middle position of the first notch, the third notch is at the bottom of the second notch, and two adjacent arc extinguishing grids are alternately arranged positively and negatively.
[0011] By adopting the above technical solution, the first notch is used to form an arc extinguishing chamber, and the second notch is on the side of the middle position of the bottom of the first notch. When two adjacent arc extinguishing grids are arranged alternately in positive and negative directions, the positions of the two second notches are staggered. When the arc is at the position of the second notch, it is easier to enter between the arc extinguishing grids, thereby reducing the resistance of the arc entering the arc extinguishing device.
[0012] Preferably, a flat plate is integrally provided on the upper portion of the side plate, heat dissipation holes are provided on the flat plate, and an arc filter assembly is provided between the flat plate and the arc extinguishing grid.
[0013] By adopting the above technical solution, a flat plate is arranged on the upper part of the side plate, the side plate is connected to the arc extinguishing grid, heat is transferred through the side plate and the flat plate, and at the same time, the arc filter assembly filters the metal particles generated by the arc.
[0014] Preferably, the arc filter assembly comprises a supporting mesh plate, a filter plate and a cooling plate, wherein the supporting mesh plate, the filter plate and the cooling plate are arranged in sequence from bottom to top, the supporting mesh plate is used to support below the filter plate, and the cooling plate is below the flat plate.
[0015] By adopting the above technical solution, the supporting mesh plate is used to support the filter plate, so that the filter plate is used to filter metal particles, and the cooling plate is used to cooperate with the flat plate to cool the internal gas.
[0016] Preferably, the moving contact and the stationary contact are both provided with main contacts and arc-striking contacts, the main contact on the stationary contact is fixed on a side of the stationary contact facing the moving contact, the arc-striking contact on the stationary contact is fixed on an arc-striking seat, the main contact on the moving contact is used to contact the main contact on the stationary contact, the arc-striking contact on the moving contact is used to contact the arc-striking contact on the stationary contact, and the two main contacts are separated before the arc-striking contacts, and the two arc-striking contacts are abutted before the two main contacts.
[0017] By adopting the above technical solution, the main contacts and the arc-striking contacts are both arranged on the moving contact and the stationary contact, and the main contacts on the moving contact and the stationary contact are used to form a conductive circuit. When the two main contacts are separated before the arc-striking contacts, the position where the arc is formed is concentrated on the arc-striking contacts, thereby protecting the main contacts from being burned by the arc.
[0018] Preferably, the moving contact is connected to a flexible wire, and a terminal block is provided at one end of the flexible wire away from the moving contact. Multiple moving contacts in a group are connected to the same driving device, and the driving device is used to drive the multiple moving contacts to move relative to the static contact at the same time.
[0019] By adopting the above technical solution, the moving contact is connected with a flexible conductor, so that the moving contact is electrically connected to the terminal board through the flexible wire, and then the moving contact is driven by the driving device to maintain good conductivity between the moving contact and the terminal board.
[0020] Preferably, the driving device includes a pull rod, a synchronization shaft, a rotating bracket and a spring. The rotating bracket is relatively fixed to the terminal block. A partition plate is rotatably connected to the rotating bracket. The partition plate is used to be arranged on the side of the moving contact, and the middle part of the moving contact is rotatably set at a position away from the rotating bracket through the synchronization shaft. One end of the spring abuts against the moving contact and the point of action with the moving contact is on the side of the synchronization shaft away from the main contact. The action force of the spring is used to drive the moving contact to rotate relative to the synchronization shaft. The pull rod is fixed on the partition plate.
[0021] By adopting the above technical solution, when the moving contact needs to be separated from the static contact, the partition plate will first release the pressure on the synchronization shaft under the action of the pull rod, and the spring will rotate the moving contact around the position of the arcing contact, so that the main contacts can be separated first. On the contrary, when the moving contact needs to abut against the static contact, the arcing contacts will contact, and then the synchronization shaft will continue to be pushed to compress the spring and make the two main contacts contact.
[0022] Preferably, a limit rod is fixedly provided on the partition plate, the limit rod is located on a side of the moving contact away from the spring, and the limit rod is used to limit the position of the spring relative to the rotation of the moving contact.
[0023] By adopting the above technical solution, the limit rod is located on the side of the moving contact away from the spring. When the spring pushes the moving contact to move, the limit rod limits the maximum movement position of the moving contact to avoid affecting the separation of the arcing contacts.
[0024] The present application also provides a universal circuit breaker for high voltage disconnection, which adopts the following technical solution:
[0025] A universal circuit breaker for high voltage breaking comprises a contact structure of the universal circuit breaker for high voltage breaking, and a front shell and a rear shell made of insulating material. The interior of the structure composed of the front shell and the rear shell is used for installing the contact structure.
[0026] By adopting the above technical solution, the interior of the structure composed of the front housing and the rear housing is used to install the contact structure to protect the insulation effect between the contact structure and the outside. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 is a schematic structural diagram of a front housing and a rear housing cut apart in an embodiment of the present application;
[0028] Figure 2 It is a schematic diagram of the state in which the moving contact and the stationary contact are disconnected in the embodiment of the present application;
[0029] Figure 3 is a schematic diagram of the position of the arc extinguishing device in the embodiment of the present application;
[0030] Figure 4is a schematic diagram of the installation structure of the moving contact in the embodiment of the present application;
[0031] Figure 5 is a schematic structural diagram of a moving contact in an embodiment of the present application;
[0032] Figure 6 It is a structural schematic diagram of a static hoe in an embodiment of the present application;
[0033] Figure 7 It is a schematic diagram of the internal structure of the arc extinguishing device in the embodiment of the present application;
[0034] Figure 8 It is a schematic diagram of the overall structure of the arc extinguishing device in the embodiment of the present application;
[0035] Fig. 9 It is a schematic diagram of the structure of the arc extinguishing grid in the embodiment of the present application.
[0036] Explanation of the reference numerals: 1. front housing; 2. rear housing; 3. moving contact; 31. flexible wire; 32. terminal block; 4. static contact; 41. arc-striking seat; 411. arc-striking angle; 5. arc-extinguishing device; 51. insulating housing; 511. side plate; 512. flat plate; 513. heat dissipation hole; 514. slot; 52. arc-extinguishing grid; 521. first notch; 522. second notch; 523. third notch; 53. arc filter assembly; 531. supporting mesh plate; 532. filter plate; 533. cooling plate; 534. mounting bracket; 6. arc-extinguishing chamber; 71. main contact; 72. arc-striking contact; 8. driving device; 81. pull rod; 82. synchronization shaft; 83. rotating bracket; 84. spring; 85. partition plate; 86. rotating shaft; 87. limit rod. DETAILED DESCRIPTION
[0037] The following is combined with Figure 1-9 This application is described in further detail.
[0038] The present application embodiment discloses a universal circuit breaker for high voltage disconnection, referring to Figure 1 and Figure 2 , including a front housing 1 and a rear housing 2, both of which are made of insulating materials, so that the front housing 1 and the rear housing 2 are relatively closed to form an insulating external structure, and are also used to support internal parts. A moving contact 3 and a stationary contact 4 are arranged between the front housing 1 and the rear housing 2, the stationary contact 4 is fixed on the rear housing 2, the moving contact 3 is movably connected to the front housing 1 or the rear housing 2, and one end of the moving contact 3 is a contact end for approaching or moving away from the stationary contact 4, and an arc extinguishing device 5 is arranged on one side of the moving contact 3 and the stationary contact 4. The arc extinguishing device 5 in this embodiment is arranged above the moving contact 3 and the stationary contact 4, so that the arc formed between the moving contact 3 and the stationary contact 4 is extinguished by the arc extinguishing device 5.
[0039] refer to Figure 3 and Figure 4 , the middle part of the arc extinguishing device 5 is recessed in the direction away from the moving contact 3 and the static contact 4 to form an arc extinguishing chamber 6, and the overall structure of the arc extinguishing chamber 6 is the highest in the middle and gradually lower on both sides. The middle refers to the position directly above the line connecting the middle positions of the static contact 4 and the moving contact 3, and the two sides are close to the static contact 4 or the position directly above the edges of the two sides of the moving contact 3. Since the middle part of the arc extinguishing chamber 6 is upwardly away from the moving contact 3 and the static contact 4, the distance between the middle of the arc extinguishing chamber 6 and the moving contact 3 and the static contact 4 is large, so that the arc formed by the moving contact 3 and the static contact 4 will take a long time to enter the arc extinguishing chamber 6, and the arc extinguishing effect is reduced. Therefore, in order to improve the arc extinguishing effect, the moving contact 3 is arranged in the shape of the arc extinguishing chamber 6, and an arc striking seat 41 is provided on the static contact 4. The moving contact 3 can be an integral structure or a plurality of moving contacts can be formed into a group. In this embodiment, a plurality of moving contacts 3 are arranged in a group. The lengths of the plurality of moving contacts 3 at the contact end are different, so that the plurality of moving contacts 3 are located in the middle of the arc extinguishing chamber 6, the longest, and the two sides are gradually lowered and symmetrically arranged. The formed arc can be divided into smaller ones by the plurality of moving contacts 3. Since the lengths of the plurality of moving contacts 3 are different, the movement trajectory of the moving contact 3 assembly is more closely fitted to the arc extinguishing chamber 6, so that the moving contact 3 is closer to the arc extinguishing device 5 during movement, so that the arc extinguishing effect is better.
[0040] refer to Figure 5 and Figure 6 A main contact 71 and an arc-striking contact 72 are provided on both the moving contact 3 and the stationary contact 4. The main contact 71 on the stationary contact 4 is fixed to a side of the stationary contact 4 facing the moving contact 3. The arc-striking seat 41 is fixed to the stationary contact 4 so that the arc-striking seat 41 and the stationary contact 4 are well electrically conductive. The arc-striking contact 72 on the stationary contact 4 is fixed to a side of the arc-striking seat 41 facing the moving contact 3. When the moving contact 3 moves and approaches the stationary contact 4, the arc-striking contact 72 on the moving contact 3 first contacts the arc-striking contact 72 on the arc-striking seat 41, and then the moving contact 3 contacts the arc-striking contact 72 on the arc-striking seat 41. The main contact 71 on the contact 3 is in contact with the main contact 71 on the static contact 4; when the moving contact 3 moves and moves away from the static contact 4, the main contact 71 on the moving contact 3 is first separated from the main contact 71 on the static contact 4, and then the arc-striking contact 72 on the moving contact 3 is separated from the arc-striking contact 72 on the arc-striking seat 41, so that the arc can be mainly generated at the position of the arc-striking contact 72, protecting the main contact 71 from burning by the arc, allowing the moving contact 3 and the static contact 4 to conduct electricity normally through the main contact 71, thereby improving the service life of the circuit breaker.
[0041] The upper part of the arc-striking seat 41 is arranged to be arc-shaped, and gradually moves away from the moving contact 3 as it extends upward, and forms an arc-striking angle 411 in the middle part of the arc-striking seat 41 extending upward. The arc-striking angle 411 can be closer to the interior of the arc-extinguishing chamber 6 during the process of extending upward, thereby guiding the arc formed between the moving contact 3 and the static contact 4 to move toward the middle of the arc-extinguishing chamber 6, and when the arc moves toward the middle of the arc-extinguishing chamber 6, the arc is blocked by the lower positions on both sides of the arc-extinguishing chamber 6, so that the arc is confined in the arc-extinguishing chamber 6, thereby improving the arc extinguishing effect.
[0042] refer to Figure 7 and Figure 8 The arc extinguishing device 5 includes an insulating housing 51 and an arc extinguishing grid 52. The insulating housing 51 can be set as a whole or as a two-half structure. The lower part of the insulating housing 51 includes at least two side plates 511. The upper part of the insulating housing 51 is a flat plate 512. The flat plate 512 is provided with heat dissipation holes 513. The flat plate 512 is integrally arranged with the side plates 511. The arc extinguishing grid 52 is installed between the two side plates 511. The two side plates 511 are parallel to the moving direction of the moving contact 3. The arc extinguishing grid 52 is vertically arranged perpendicular to the side plates 511. When the arc extinguishing grid 52 is extinguished, the heat can be transferred from the side plates 511 through the flat plate 512, thereby improving the heat dissipation efficiency of the arc extinguishing grid 52. A clamping groove 514 is arranged on the opposite surfaces of the two side plates 511. The side edges of the arc extinguishing grid 52 are fitted in the clamping groove 514. The arc extinguishing grid 52 is kept at equal intervals through the clamping grooves 514 with equal intervals. An arc filter assembly 53 is arranged between the upper part of the arc extinguishing grid 52 and the flat plate 512. The arc filter assembly 53 includes a supporting mesh plate 531, a filter plate 532 and a cooling plate 533. The supporting mesh plate 531, the filter plate 532 and the cooling plate 533 are arranged in sequence from bottom to top. The supporting mesh plate 531, the filter plate 532 and the cooling plate 533 are all made of insulating materials. The arc filter assembly 53 is used to filter and cool down the metal particles. The cooling plate 533 has openings corresponding to the heat dissipation holes 513. The supporting mesh plate 531 is used to support the filter plate 532. The supporting mesh plate 531 is fixed on the mounting frame 534. At the same time, the insulating housing 51 is also fixed on the mounting frame 534. The mounting frame 534 is fixed to the front housing 1 and the rear housing 2 by screws. The filter plate 532 is arranged to have a continuous S-shaped cross section along one direction.
[0043] refer to Fig. 9The arc-extinguishing grid 52 is in sheet shape as a whole, and is provided with a first notch 521, a second notch 522 and a third notch 523. The first notch 521 is located in the middle of one side of the arc-extinguishing grid 52. The first notch 521 on the arc-extinguishing grid 52 faces the positions of the moving contact 3 and the stationary contact 4. The first notch 521 is in U-shape as a whole, and both sides of the first notch 521 are inclined. The second notch 522 is located at the bottom of the first notch 521 and deviates from the middle position of the first notch 521, so that the second notch 522 is V-shaped. The third notch 523 is located at the angle of the second notch 522. The third notch 523 is limited by the position of the second notch 522 and also deviates from the middle part of the arc-extinguishing grid 52. When the arc extinguishing grids 52 are installed, two adjacent arc extinguishing grids 52 are arranged alternately in front and back, so that the third notches 523 on the two adjacent arc extinguishing grids 52 are not on the same straight line, and the positions of the second notches 522 are arranged at intervals of one arc extinguishing grid 52. The first notches 521 in the multiple arc extinguishing grids 52 form an arc extinguishing chamber 6. At the same time, when the arc enters the arc extinguishing chamber 6 and reaches the position of the second notch 522 through the arc striking angle 411, it is easier to enter between the two arc extinguishing grids 52, thereby reducing resistance and improving the arc extinguishing effect.
[0044] refer to Figure 3 and Figure 5 The movable contact 3 is connected with a flexible conductor 31, which can be made of copper sheet or copper braided wire. One end of the flexible conductor is fixed on the movable contact 3, and the other end is connected with a terminal block 32, which is fixed on the rear housing 2. A group of multiple movable contacts 3 is connected with a drive device 8, which can be linked to an energy storage mechanism or manually controlled, or automatically disconnected or remotely controlled when a fault occurs. The drive device 8 is used to drive the movable contact 3 to approach or move away from the static contact 4.
[0045] refer to Figure 3 and Figure 4The driving device 8 includes a pull rod 81, a synchronous shaft 82, a rotating bracket 83 and a spring 84. The rotating bracket 83 is fixed on the rear housing 2. The rotating bracket 83 is made of insulating material. The rotating bracket 83 is used to rotatably install a group of multiple moving contacts 3. A partition plate 85 is arranged between the multiple moving contacts 3. The partition plate 85 is made of insulating material. A rotating shaft 86 is arranged at one end of the partition plate 85. The rotating shaft 86 is rotatably connected to the rotating bracket 83. A synchronous shaft 82 is arranged at one end of the partition plate 85 away from the rotating shaft 86. The synchronous shaft 82 and the rotating shaft 86 are parallel and pass through the multiple partition plates 85 at the same time. The multiple partition plates 85 can be fixed to each other. One end of the spring 84 is used to abut against the end of the moving contact 3 away from the contact end, and the other end of the spring 84 is used to abut against the rear housing 2. The force of the spring 84 is used to drive the moving contact 3 to rotate around the synchronous shaft 82. The pull rod 81 is installed on the partition plate 85. The partition plate 85 is rotated around the rotating shaft 86 by the pull rod 81, so that the moving contact 3 rotates with the partition plate 85. Due to the force of the spring 84, the arc-striking contact 72 away from the spring 84 contacts first, and then the force is applied to the synchronization shaft 82. At this time, the spring 84 is compressed and the main contact 71 contacts again; on the contrary, when the moving contact 3 is away from the static contact 4, the force of the spring 84 is released first, so that the two contacting main contacts 71 are separated first, and then the arc-striking contact 72 is separated. A limit rod 87 is also fixedly set on the partition plate 85. The limit rod 87 is on the side of the moving contact 3 away from the spring 84, so that when the spring 84 rotates the moving contact 3, the limit rod 87 can limit the position of the moving contact 3.
[0046] The working process of this embodiment:
[0047] When the circuit breaker detects a fault current or a tripping command, the moving contact 3 will be pulled by the driving device 8 and separated from the static contact 4. The driving device 8 will separate the upper arc-striking contact 72 slower than the lower main contact 71, and an arc will be generated between the moving contact and the arc-striking contact 72 of the static contact 4. The arc will be elongated as the moving contact 3 and the static contact 4 are opened. The elongated arc will enter the arc extinguishing chamber 6 due to the tip discharge effect, and the arc will be deionized and cooled in the arc extinguishing grid and then extinguished with zero rest.
[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A contact structure of a universal circuit breaker for high voltage disconnection, comprising a moving contact (3) and a stationary contact (4), wherein the moving contact (3) is opened and closed by moving closer to or farther from the stationary contact (4), and characterized in that: An arc extinguishing device (5) is provided on one side of the moving contact (3) and the stationary contact (4). The arc extinguishing device (5) is used to extinguish an arc formed by the movement of the moving contact (3). The middle of the arc extinguishing device (5) is recessed in a direction away from the moving contact (3) and the stationary contact (4) to form an arc extinguishing chamber (6). The middle of the arc extinguishing chamber (6) is the highest and the two sides gradually decrease. The end of the moving contact (3) close to the arc extinguishing chamber (6) is a contact end. The moving contacts (3) are formed into a group of multiple ones and are used to be electrically connected to the same stationary contact (4). The length of the moving contact (3) in the middle of the arc extinguishing chamber (6) is greater than the length of the moving contacts (3) on both sides of the arc extinguishing chamber (6). The stationary contact (4) is provided with an arc striking seat (41). The upper part of the arc striking seat (41) is provided with an arc striking angle (411) extending toward the arc extinguishing chamber (6).
2. The contact structure of a universal circuit breaker for high voltage disconnection according to claim 1, characterized in that: The arc extinguishing device (5) comprises an insulating housing (51) and an arc extinguishing grid (52); the insulating housing (51) comprises two side plates (511); the two side plates (511) are parallel to the movement track of the moving contact (3); opposing surfaces of the two side plates (511) are provided with a clamping groove (514); the arc extinguishing grid (52) is fitted in the clamping groove (514); and the arc extinguishing grid (52) is perpendicular to the side plates (511) and is vertically arranged.
3. The contact structure of a universal circuit breaker for high voltage disconnection according to claim 2, characterized in that: The arc extinguishing grid (52) is provided with a first notch (521), a second notch (522) and a third notch (523); the first notch (521) is located in the middle of one side of the arc extinguishing; the first notches (521) of a plurality of arc extinguishing grids (52) form the arc extinguishing chamber (6); the second notch (522) is located at the bottom of the first notch (521) and deviates from the middle of the first notch (521); the third notch (523) is located at the bottom of the second notch (522); and two adjacent arc extinguishing grids (52) are arranged alternately in positive and negative directions.
4. The contact structure of a universal circuit breaker for high voltage disconnection according to claim 2, characterized in that: A flat plate (512) is integrally provided on the upper portion of the side plate (511), a heat dissipation hole (513) is provided on the flat plate (512), and an arc filter assembly (53) is provided between the flat plate (512) and the arc extinguishing grid (52).
5. The contact structure of a universal circuit breaker for high voltage disconnection according to claim 4, characterized in that: The arc filter assembly (53) comprises a supporting mesh plate (531), a filter plate (532) and a cooling plate (533), wherein the supporting mesh plate (531), the filter plate (532) and the cooling plate (533) are arranged in sequence from bottom to top, wherein the supporting mesh plate (531) is used for supporting below the filter plate (532), and the cooling plate (533) is located below the flat plate (512).
6. The contact structure of a universal circuit breaker for high voltage disconnection according to claim 1, characterized in that: The moving contact (3) and the stationary contact (4) are both provided with a main contact (71) and an arc-striking contact (72); the main contact (71) on the stationary contact (4) is fixed to a side of the stationary contact (4) facing the moving contact (3); the arc-striking contact (72) on the stationary contact (4) is fixed to an arc-striking seat (41); the main contact (71) on the moving contact (3) is used to contact the main contact (71) on the stationary contact (4); the arc-striking contact (72) on the moving contact is used to contact the arc-striking contact (72) on the stationary contact (4); and the two main contacts (71) are separated before the arc-striking contact (72); and the two arc-striking contacts (72) are abutted before the two main contacts (71).
7. The contact structure of a universal circuit breaker for high voltage disconnection according to claim 6, characterized in that: The movable contact (3) is connected to a flexible wire (31), and a wiring board (32) is provided at one end of the flexible wire (31) away from the movable contact. A plurality of movable contacts (3) in a group are connected to the same drive device (8), and the drive device (8) is used to drive the plurality of movable contacts (3) to move relative to the stationary contact (4) at the same time.
8. The contact structure of a universal circuit breaker for high voltage disconnection according to claim 7, characterized in that: The driving device (8) comprises a pull rod (81), a synchronization shaft (82), a rotating bracket (83) and a spring (84); the rotating bracket (83) is relatively fixed to the terminal board (32); a partition plate (85) is rotatably connected to the rotating bracket (83); the partition plate (85) is used to be arranged on the side of the moving contact (3); and the middle part of the moving contact (3) is rotatably arranged at a position away from the rotating bracket (83) through the synchronization shaft (82); one end of the spring (84) abuts against the moving contact (3) and the point of action with the moving contact (3) is on the side of the synchronization shaft (82) away from the main contact (71); the action force of the spring (84) is used to drive the moving contact to rotate relative to the synchronization shaft (82); and the pull rod (81) is fixed on the partition plate (85).
9. According to the contact structure of a universal circuit breaker for high voltage disconnection as claimed in claim 8, a limit rod (87) is fixedly arranged on the partition plate (85), and the limit rod (87) is located on the side of the moving contact (3) away from the spring (84), and the limit rod (87) is used to limit the position of the spring (84) relative to the rotation of the moving contact (3).
10. A universal circuit breaker for high voltage disconnection, characterized in that: The invention comprises a contact structure of a universal circuit breaker for high voltage disconnection as claimed in any one of claims 1 to 9, and a front shell (1) and a rear shell (2) made of insulating material, wherein the interior of the structure composed of the front shell (1) and the rear shell (2) is used for installing the contact structure.