Arc extinguish chamber
By designing an arc-extinguishing chamber and utilizing the combination of the contact spring and the tail tungsten ring, as well as the vent structure, the problem of insufficient arc-extinguishing capability of the disconnecting switch under load current was solved, achieving efficient arc extinguishing and heat dissipation, and improving the reliability of the equipment.
Patent Information
- Application Number
- CN202520301775.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-25
AI Technical Summary
Existing disconnect switches lack arc extinguishing capability and cannot open or close circuits under load current conditions, affecting their reliability.
An arc-extinguishing chamber is designed that, through the cooperation of a contact spring and a tungsten ring at the tail, a compression spring releases pressure to drive the contact spring to quickly separate from the tungsten ring at the tail, and heat is dissipated through the vent holes on the outside of the tail sleeve, thereby improving the arc extinguishing efficiency.
It significantly improves arc extinguishing efficiency, effectively disperses and consumes the heat generated by the electric arc, enhances the arc extinguishing effect, and ensures the normal operation of switchgear under load current conditions.
Smart Images
Figure CN223871391U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power system and equipment technology, specifically to an arc-extinguishing chamber. Background Technology
[0002] A disconnecting switch is a switching device primarily used for isolating power sources, switching operations, and connecting and disconnecting small-current circuits, without arc-extinguishing functionality. When in the open position, the disconnecting switch has a specified insulation distance between its contacts and a clear disconnection mark; when in the closed position, it can carry current under normal circuit conditions and current under abnormal conditions for a specified time. It is generally used as a high-voltage disconnecting switch, i.e., a disconnecting switch with a rated voltage of 1kV or higher. While its working principle and structure are relatively simple, its widespread use and high reliability requirements significantly impact the design, construction, and safe operation of substations and power plants.
[0003] However, in the existing technology, disconnecting switches lack arc extinguishing capability and can only open and close circuits when there is no load current, which affects their use. Therefore, this utility model proposes an arc extinguishing chamber. Utility Model Content
[0004] The purpose of this invention is to provide an arc-extinguishing chamber that significantly improves the arc extinguishing efficiency of the chamber through the cooperation of the contact spring and the tail tungsten ring. It can effectively disperse and consume the heat generated by the arc, thereby enhancing the arc extinguishing effect. The pressure released by the compression spring drives the contact spring to quickly separate from the tail tungsten ring, which effectively improves the arc extinguishing efficiency. The vent hole on the outside of the tail sleeve helps to accelerate the heat dissipation during the arc extinguishing process.
[0005] To achieve the above-mentioned utility model objectives, the technical solution provided by this utility model is as follows: an arc-extinguishing chamber includes a gas-generating cylinder body, a tail sleeve connected to the left side of the gas-generating cylinder body, an insulating sleeve connected to the right side of the tail sleeve, a mechanism cover connected to the right side of the insulating sleeve, a shaft connected inside the mechanism cover, a crank arm plate connected to one end of the shaft, and a load hook connected to the outer side of the crank arm plate.
[0006] Furthermore, a compression spring is connected to the other end of the shaft, and an air cylinder rod is provided at the other end of the compression spring. A limit plate is connected to the top of the air cylinder rod.
[0007] Furthermore, a contact spring is connected to the rear side of the tail sleeve, and a tail tungsten ring is connected to the right side of the contact spring.
[0008] Furthermore, the outer side of the tail sleeve is provided with evenly spaced ventilation holes.
[0009] The advantages of this invention compared to the prior art are as follows: by cooperating with the contact spring and the tail tungsten ring, the arc extinguishing efficiency of the arc extinguishing chamber is significantly improved, the heat generated by the arc can be effectively dispersed and consumed, and the arc extinguishing effect is enhanced. The pressure released by the compression spring drives the contact spring and the tail tungsten ring to quickly separate, which effectively improves the arc extinguishing efficiency. The vent hole opened on the outside of the tail sleeve helps to accelerate the heat dissipation during the arc extinguishing process. Attached Figure Description
[0010] Appendix Figure 1 This is a schematic diagram of the main structure of an arc-extinguishing chamber according to the present invention;
[0011] Appendix Figure 2 This is a partial cross-sectional view of an arc-extinguishing chamber according to the present invention.
[0012] As shown in the figure: 1. Gas cylinder body; 2. Tail sleeve; 3. Insulating sleeve; 4. Mechanism cover; 5. Shaft; 6. Crank arm plate; 7. Compression spring; 8. Limiting plate; 9. Gas cylinder pull rod; 10. Contact spring; 11. Tail tungsten ring. Detailed Implementation
[0013] To make the content of this utility model easier to understand, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.
[0014] Combined with appendix Figure 1 To be continued Figure 2 An arc-extinguishing chamber includes a gas-generating cylinder body 1. A tail sleeve 2 is connected to the left side of the gas-generating cylinder body 1, and an insulating sleeve 3 is connected to the right side of the tail sleeve 2. A mechanism cover 4 is connected to the right side of the insulating sleeve 3. A shaft 5 is fitted inside the mechanism cover 4. One end of the shaft 5 is connected to a crank arm plate 6, and the outer side of the crank arm plate 6 is connected to a load hook. The arc-extinguishing chamber is fixed to a switch via the tail sleeve 2. When the switch is opened, the load hook drives the crank arm plate 6 to rotate. Furthermore, a compression spring 7 is connected to the other end of the shaft 5, and a gas cylinder pull rod 9 is provided at the other end of the compression spring 7. A limit plate 8 is connected to the top of the gas cylinder pull rod 9. Furthermore, a contact spring 10 is connected to the rear side of the tail sleeve 2, and a tail tungsten ring 11 is connected to the right side of the contact spring 10. The crank arm plate 6 drives the shaft 5 to rotate, and the gas cylinder pull rod 9 drives the compression spring 7 to stretch. After the moving contact and stationary contact of the switch separate, when the limit plate 8 touches the limit card, the compression spring 7 releases pressure, causing the tail tungsten ring 11 of the gas-generating cylinder to quickly disengage from the tail sleeve contact spring 10.
[0015] Furthermore, the outer side of the tail sleeve 2 is evenly provided with ventilation holes, and the generated electric arc is discharged through the ventilation holes at the end of the tail sleeve.
[0016] The specific implementation of this utility model is as follows: The arc-extinguishing chamber is fixed to the switch by the tail sleeve 2. When the switch is opened, the load hook drives the crank arm plate 6 to rotate. The crank arm plate 6 drives the shaft 5 to rotate. The air cylinder pull rod 9 drives the compression spring 7 to stretch. After the switch moving contact and stationary contact are separated, when the limit plate 8 touches the limit card, the compression spring 7 releases the pressure, so that the tungsten ring 11 at the tail of the gas cylinder and the contact spring 10 of the tail sleeve are quickly separated, and the electric arc is discharged through the vent hole at the end of the tail sleeve.
[0017] The above description is only a preferred embodiment of this utility model patent and is not intended to limit this utility model patent. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this utility model patent should be included within the protection scope of this utility model patent.
Claims
1. An arc-extinguishing chamber, comprising a gas-generating cylinder body (1), characterized in that, The gas generating cylinder body (1) is connected to a tail sleeve (2) on the left side, and an insulating sleeve (3) is connected to the right side of the tail sleeve (2). A mechanism cover (4) is connected to the right side of the insulating sleeve (3). A shaft (5) is connected inside the mechanism cover (4). A crank arm plate (6) is connected to one end of the shaft (5). The outside of the crank arm plate (6) is connected to a load hook.
2. The arc-extinguishing chamber according to claim 1, characterized in that, The other end of the shaft (5) is connected to a compression spring (7), and the other end of the compression spring (7) is provided with an air cylinder rod (9). The top end of the air cylinder rod (9) is connected to a limit plate (8).
3. The arc-extinguishing chamber according to claim 2, characterized in that, The tail sleeve (2) is connected to a contact spring (10) on its rear side, and a tail tungsten ring (11) is connected to the right side of the contact spring (10).
4. The arc-extinguishing chamber according to claim 1, characterized in that, The tail sleeve (2) has evenly spaced ventilation holes on its outer side.