A novel arc shielding structure for vacuum switch tubes

Abstract

This utility model discloses a novel arc shielding structure for a vacuum switch tube, relating to the field of electrical switch technology. It includes a ceramic tube body, with a movable rod slidably connected to the upper end of the ceramic tube body. The upper end of the movable rod is connected to a switching device that drives the movable rod's movement. A movable end block is provided inside the ceramic tube body on the movable rod. A stationary rod is fixedly connected to the lower end of the ceramic tube body, and a stationary end block is slidably connected to the stationary rod inside the ceramic tube body. A displacement device is provided at the lower end of the stationary end block to quickly move it away from the movable end block. A driving mechanism is provided on the surface of the movable end block to drive the stationary end block's movement. A second transmission seat drives the connecting block and the stationary end block to move upwards, causing the stationary end block to follow the movable end block for a certain distance without generating an arc. When the transmission block disengages from the first transmission seat, the movable end block and the stationary end block separate, generating an arc. Simultaneously, a first spring quickly pushes the stationary end block downwards, causing the arc to disappear quickly and reducing damage to the stationary end block.

Description

Technical Field

[0001] This utility model relates to the field of electrical switch technology, specifically a novel arc shielding structure for vacuum switch tubes. Background Technology

[0002] Vacuum switch tubes, also known as vacuum interrupters, are devices used in high-voltage power switches. By separating the moving and stationary contacts, the current is reduced to the contact separation point, resulting in increased resistance and temperature, which in turn forms a vacuum arc. During the arcing process, the longitudinal magnetic field on the stationary head makes the arc evenly distributed on the contact surface, maintaining a low arc voltage, thereby rapidly spreading the arc plasma and achieving current interruption. It has the advantages of strong interruption capability and no arc exposure.

[0003] For example, the patent document with announcement number CN221687445U describes a high-voltage resistant vacuum switch tube. A hook rod actuates a sliding wedge, causing the moving contact to move synchronously with the stationary contact during reset. Furthermore, the limiting wedge causes a first spring to act, rapidly separating the stationary and moving contacts, resulting in an instantaneous elongation of the arc. This reduces the electric field strength, forcing the arc current to quickly reach zero, thus extinguishing the arc rapidly. Consequently, the temperature and pressure of the arc between the contacts drop sharply, improving the high-voltage resistance of the vacuum switch tube and reducing contact burnout. However, this high-voltage resistant vacuum switch tube uses a first spring to provide power for the stationary contact reset. The spring vibrates continuously during the reset process, causing significant damage to the stationary contact.

[0004] Based on this, a novel arc shielding structure for vacuum switch tubes is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a novel arc shielding structure for vacuum switch tubes to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel arc shielding structure for a vacuum switch tube includes a ceramic tube body. A movable rod is slidably connected to the upper end of the ceramic tube body. A switching device for driving the movable rod is connected to the upper end of the movable rod. A movable end block is provided inside the ceramic tube body. A stationary rod is fixedly connected to the lower end of the ceramic tube body. A stationary end block is slidably connected to the stationary end block inside the ceramic tube body. A displacement device is provided at the lower end of the stationary end block to quickly move the stationary end block away from the movable end block. A driving mechanism for driving the stationary end block to move is provided on the surface of the movable end block.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative: the displacement device includes a connecting block, the connecting block being fixedly connected to the lower end of the stationary block, the lower end of the connecting block being fixedly connected to a second transmission seat, and the transmission seat having a limiting component on its side for limiting the stationary block.

[0010] In one alternative embodiment: the limiting component includes a fixing block, two fixing blocks are fixedly connected to the side of the second transmission seat, the upper end of the fixing block is provided with a first sliding groove, the first sliding groove is slidably connected to a first sliding tube, one end of the first sliding tube is fixedly connected to the limiting block, the static rod is provided with a slot adapted to the limiting block, the other end of the first sliding tube is fixedly connected to one end of a second spring, the other end of the second spring is fixedly connected to the inner wall of the first sliding groove, and the upper end of the first sliding groove is fixedly connected to a reset element for adjusting the fixing block to reset.

[0011] In one alternative: the reset element includes a first slide groove, the upper end of which is fixedly connected to one end of a first spring, and the other end of the first spring is fixedly connected to the inner wall of the stationary rod.

[0012] In one alternative: the driving mechanism includes a transmission rod, a transmission rod is fixedly connected to the surface of the moving end block, a transmission block is fixedly connected to the lower end of the transmission rod, a first transmission seat is fixedly connected to the surface of the second transmission seat, the surface of the first transmission seat is provided with a second sliding groove adapted to the transmission block, and a transmission module is provided inside the first transmission seat.

[0013] In one alternative embodiment: the transmission module includes a second sliding block, which is slidably connected to a first transmission seat. One end of the second sliding block is provided with a locking block adapted to the transmission block, and the other end of the second sliding block is fixedly connected to one end of a third spring. The other end of the third spring is fixedly connected to the inner wall of the first transmission seat.

[0014] In one alternative: the surface of the limiting block is provided with a buffer layer.

[0015] In one alternative: the ceramic tube body is provided with a shielding cover.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model uses the second transmission seat to drive the connecting block and the stationary block to move upward, so that the stationary block follows the moving block for a certain distance without generating an electric arc. When the transmission block disengages from the first transmission seat, the moving block and the stationary block separate, generating an electric arc. At the same time, the first spring quickly pushes the stationary block downward, so that the electric arc disappears quickly and damage to the stationary block is reduced.

[0018] 2. In this utility model, the limiting block is inserted into the slot on the inner wall of the stationary rod, so that the stationary end block can quickly return to a stationary state and prevent repeated triggering of electric arc. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the fixing block of this utility model.

[0021] Figure 3 This is a schematic diagram of the transmission seat of this utility model.

[0022] Figure 4 This is a schematic diagram of the transmission seat of this utility model.

[0023] Figure reference numerals: 101. Ceramic tube body, 102. Moving rod, 103. Moving end block, 104. Stationary rod, 105. Stationary end block, 201. Spring No. 1, 202. Slide No. 1, 203. Sliding tube No. 1, 204. Limiting block, 205. Fixing block, 206. Spring No. 2, 301. Transmission rod, 302. Transmission block, 303. First transmission seat, 304. Slide No. 2, 305. Sliding block No. 2, 306. Spring No. 3, 401. Connecting block, 402. Second transmission seat. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] In one embodiment, such as Figures 1-3 As shown, a novel arc shielding structure for a vacuum switch tube includes a ceramic tube 101. A movable rod 102 is slidably connected to the upper end of the ceramic tube 101. A switching device for driving the movable rod 102 is connected to the upper end of the movable rod 102. A movable end block 103 is provided inside the ceramic tube 101 within the movable rod 102. A stationary rod 104 is fixedly connected to the lower end of the ceramic tube 101. A stationary end block 105 is slidably connected to the stationary rod 104 inside the ceramic tube 101. A displacement device is provided at the lower end of the stationary end block 105 to quickly move the stationary end block 105 away from the movable end block 103. The surface of the movable end block 103 is provided with… The drive mechanism that moves the stationary block 105 moves the moving rod 102 downward through the switching device, so that the moving block 103 is in contact with the stationary block 105. The moving rod 102, the moving block 103, the stationary block 105 and the stationary rod 104 form a conductive circuit to complete the power supply operation. When it is necessary to disconnect the circuit, the switching device moves the moving rod 102 upward, so that the moving block 103 is separated from the stationary block 105. When the moving block 103 and the stationary block 105 are separated, an electric arc is generated between the stationary block 105 and the moving block 103. When the moving block 103 moves to a certain distance, the circuit disappears, and the power-off operation is completed.

[0026] In one embodiment, such as Figure 2 As shown, the displacement device includes a connecting block 401, which is fixedly connected to the lower end of the stationary block 105. The lower end of the connecting block 401 is fixedly connected to the second transmission seat 402. The side of the second transmission seat 402 is provided with a limiting component that provides a limit for the stationary block 105. The connecting block 401 and the second transmission seat 402 provide conditions for the movement of the stationary block 105.

[0027] In one embodiment, such as Figure 2 and Figure 3 As shown, the limiting component includes a fixing block 205. Two fixing blocks 205 are fixedly connected to the side of the second transmission seat 402. The upper end of the fixing block 205 is provided with a first sliding groove 202. The first sliding groove 202 is slidably connected to a first sliding tube 203. One end of the first sliding tube 203 is fixedly connected to a limiting block 204. The stationary rod 104 is provided with a slot adapted to the limiting block 204. The other end of the first sliding tube 203 is fixedly connected to one end of a second spring 206. The other end of the second spring 206 is fixedly connected to... The inner wall of the first slide groove 202 is fixedly connected to the upper end of the first slide groove 202, which is a reset element that resets the adjusting fixed block 205. When the stationary end block 105 moves upward, the stationary end block 105 drives the fixed block 205 to move upward, so that the limiting block 204 slides out of the slot inside the stationary rod 104. When the stationary end block 105 moves downward, the second spring 206 provides power to drive the first sliding tube 203 to move. The first sliding tube 203 adjusts the limiting block 204 to re-insert into the slot inside the stationary rod 104, providing a limit for the stationary end block 105.

[0028] In one embodiment, such as Figure 3 and Figure 4 As shown, the reset element includes a first slide groove 202, with one end of a first spring 201 fixedly connected to the upper end of the first slide groove 202, and the other end of the first spring 201 fixedly connected to the inner wall of the stationary rod 104. The first slide groove 202 provides downward support force to the stationary block 105 and provides power to stabilize the stationary block 105.

[0029] In one embodiment, such as Figure 3 and Figure 4 As shown, the driving mechanism includes a transmission rod 301. A transmission rod 301 is fixedly connected to the surface of the moving end block 103. A transmission block 302 is fixedly connected to the lower end of the transmission rod 301. A first transmission seat 303 is fixedly connected to the surface of the second transmission seat 402. A second sliding groove 304 adapted to the transmission block 302 is provided on the surface of the first transmission seat 303. A transmission module is provided inside the first transmission seat 303. When the moving end block 103 moves downward, the transmission rod 301 moves downward, and the transmission rod 301 drives the transmission block 302 to move downward, so that the transmission block 302 inserts into the second sliding groove 304.

[0030] In one embodiment, such as Figure 3 and Figure 4 As shown, the transmission module includes a second sliding block 305, which is slidably connected to a first transmission seat 303. One end of the second sliding block 305 is provided with a locking block adapted to the transmission block 302. The other end of the second sliding block 305 is fixedly connected to one end of a third spring 306, and the other end of the third spring 306 is fixedly connected to the inner wall of the first transmission seat 303. The transmission block 302 is inserted into the second sliding groove 304, and the moving end block 103 and the stationary end block 105 are in contact and energized. When power needs to be cut off, the moving end block 103 moves upward, and the transmission block 302 drives the first transmission seat 303 to move upward through the second sliding block 305, which in turn drives the second transmission seat 402 to move upward. The second transmission seat 402 drives the connecting block 401 and the stationary end block 105 to move upward, so that the stationary end block 105 moves a certain distance with the moving end block 103 without generating an electric arc. The first spring 201 is compressed. When the first spring 201... When the force applied by the first slide groove 202 is greater than the frictional force between the second sliding block 305 and the transmission block 302, the second sliding block 305 slides into the first transmission seat 303, allowing the transmission block 302 to disengage from the first transmission seat 303. This causes the moving end block 103 and the stationary end block 105 to separate, generating an electric arc between them. Simultaneously, the first spring 201 rapidly pushes the first slide groove 202 downwards, causing the first slide groove 202 to drive the stationary end block 105... 05 moves downward, causing the electric arc between the moving end block 103 and the stationary end block 105 to disappear. When the stationary end block 105 moves downward rapidly, the second spring 206 pushes the first sliding tube 203 and the limiting block 204 to extend, so that the limiting block 204 inserts into the slot on the inner wall of the stationary rod 104, causing the first slide groove 202 to stop moving. The first slide groove 202 drives the stationary end block 105 to stop moving, so that the stationary end block 105 quickly returns to a stationary state, reducing the wear of the stationary end block 105.

[0031] The above embodiment discloses a novel arc shielding structure for a vacuum switch tube. In this structure, a switching device drives a moving rod 102 downwards, causing the moving end block 103 to contact the stationary end block 105. When the moving end block 103 moves downwards, a transmission rod 301 moves downwards, driving a transmission block 302 downwards, causing the transmission block 302 to insert into a second sliding groove 304. This allows the moving rod 102, moving end block 103, stationary end block 105, and stationary rod 104 to form a conductive circuit, completing the energizing operation. When the circuit is disconnected, the switching device drives the moving rod 102 upward, separating the moving end block 103 from the stationary end block 105. When the moving end block 103 and stationary end block 105 are separated, the transmission block 302, through the second sliding block 305, drives the first transmission seat 303 upward, which in turn drives the second transmission seat 402 upward. The second transmission seat 402 then drives the connecting block 401 and the stationary end block 105 upward, causing the stationary end block 105 to move a certain distance with the moving end block 103 without generating an electric arc. The first spring... When spring 201 is compressed, and the force exerted by spring 201 on slide groove 202 is greater than the friction between slide block 305 and transmission block 302, slide block 305 slides into the first transmission seat 303, allowing transmission block 302 to disengage from the first transmission seat 303. This causes moving end block 103 and stationary end block 105 to separate, generating an electric arc between them. Simultaneously, spring 201 rapidly pushes slide groove 202 downwards, causing slide groove 202 to... The moving and stationary end blocks 105 move downwards, causing the electric arc between the moving end block 103 and the stationary end block 105 to disappear. When the stationary end block 105 moves downwards rapidly, the second spring 206 pushes the first sliding tube 203 and the limiting block 204 to extend, causing the limiting block 204 to insert into the slot on the inner wall of the stationary rod 104, causing the first sliding groove 202 to stop moving. The first sliding groove 202 drives the stationary end block 105 to stop moving, causing the stationary end block 105 to quickly return to a stationary state, reducing the wear of the stationary end block 105, and completing the power-off operation.

[0032] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A novel arc shielding structure for a vacuum switch tube, comprising a ceramic tube body (101), wherein a moving rod (102) is slidably connected to the upper end of the ceramic tube body (101), a switching device for driving the moving rod (102) is connected to the upper end of the moving rod (102), a moving end block (103) is provided inside the ceramic tube body (101) in the moving rod (102), and a stationary rod (104) is fixedly connected to the lower end of the ceramic tube body (101), wherein a stationary end block (105) is slidably connected to the stationary rod (104) inside the ceramic tube body (101), characterized in that, The lower end of the stationary end block (105) is provided with a displacement device that allows the stationary end block (105) to move away from the moving end block (103) quickly, and the surface of the moving end block (103) is provided with a drive mechanism that drives the stationary end block (105) to move.

2. The novel arc shielding structure for a vacuum switch tube according to claim 1, characterized in that, The displacement device includes a connecting block (401), which is fixedly connected to the lower end of the stationary block (105). The lower end of the connecting block (401) is fixedly connected to a second transmission seat (402). The side of the second transmission seat (402) is provided with a limiting component that provides a limit for the stationary block (105).

3. The novel arc shielding structure for a vacuum switch tube according to claim 2, characterized in that, The limiting component includes a fixing block (205), two fixing blocks (205) are fixedly connected to the side of the second transmission seat (402), the upper end of the fixing block (205) is provided with a first sliding groove (202), the first sliding groove (202) is slidably connected to a first sliding tube (203), one end of the first sliding tube (203) is fixedly connected to a limiting block (204), the inside of the stationary rod (104) is provided with a slot that matches the limiting block (204), the other end of the first sliding tube (203) is fixedly connected to one end of a second spring (206), the other end of the second spring (206) is fixedly connected to the inner wall of the first sliding groove (202), and the upper end of the first sliding groove (202) is fixedly connected to a reset element for adjusting the fixing block (205) to reset.

4. The novel arc shielding structure for a vacuum switch tube according to claim 3, characterized in that, The reset element includes a first slide groove (202), the upper end of which is fixedly connected to one end of a first spring (201), and the other end of the first spring (201) is fixedly connected to the inner wall of the stationary rod (104).

5. The novel arc shielding structure for a vacuum switch tube according to claim 2, characterized in that, The driving mechanism includes a transmission rod (301), a transmission rod (301) is fixedly connected to the surface of the moving end block (103), a transmission block (302) is fixedly connected to the lower end of the transmission rod (301), a first transmission seat (303) is fixedly connected to the surface of the second transmission seat (402), a second sliding groove (304) adapted to the transmission block (302) is provided on the surface of the first transmission seat (303), and a transmission module is provided inside the first transmission seat (303).

6. The novel arc shielding structure for a vacuum switch tube according to claim 5, characterized in that, The transmission module includes a second sliding block (305), which is slidably connected to a first transmission seat (303). One end of the second sliding block (305) is provided with a locking block that is compatible with the transmission block (302). The other end of the second sliding block (305) is fixedly connected to one end of a third spring (306), and the other end of the third spring (306) is fixedly connected to the inner wall of the first transmission seat (303).

7. The novel arc shielding structure for a vacuum switch tube according to claim 3, characterized in that, The surface of the limiting block (204) is provided with a buffer layer.

8. The novel arc shielding structure for a vacuum switch tube according to claim 1, characterized in that, The ceramic tube (101) is equipped with a shielding cover inside.

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