Isolating switch arc extinguishing device

Abstract

The utility model relates to the technical field of isolating switches, and discloses an arc extinguishing device of an isolating switch, which comprises a switch base main body and three groups of porcelain insulators, and the lower parts of the three groups of porcelain insulators are all connected to the switch base main body. The bottom of the porcelain insulator in the middle is hinged to the switch base body, and the upper end of the porcelain insulator is connected with an arc extinguishing device. The utility model has the advantages that through the matching of the arc striking rod and the arc striking vertical spring, the generation of electric arc is effectively inhibited, the extinguishing of the electric arc is accelerated, the erosion of the electric arc to the contact is reduced, the temperature rise of the moving contact and the static contact is effectively prevented from being too high in the operation process of the switch, the surfaces of the moving contact and the static contact are protected from being burnt by the electric arc, and the service life of the switch is prolonged. And the contact reliability is ensured.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, specifically to an arc-extinguishing device for disconnecting switches. Background Technology

[0002] Disconnecting switches are often used in power distribution systems. Common disconnecting switches include sliding disconnecting switches and disconnecting switches. Existing disconnecting switches do not have the ability to break small loads. The arc during the switch opening operation can burn the contact surface of the moving and stationary contacts, leading to poor contact. During the operation of the switch, the moving and stationary contacts will overheat, affecting the safe operation of the switch. Therefore, this utility model proposes an arc extinguishing device for disconnecting switches. Utility Model Content

[0003] The purpose of this invention is to provide an arc-extinguishing device for disconnecting switches. Through the cooperation of the arc-initiating rod and the arc-initiating spring, it can not only effectively suppress the generation of electric arc, but also accelerate the extinguishing of electric arc, reduce the erosion of the contacts by electric arc, effectively prevent the moving and stationary contacts from overheating during switch operation, protect the surfaces of the moving and stationary contacts from being burned by electric arc, and ensure contact reliability.

[0004] To achieve the above-mentioned utility model objectives, the technical solution provided by this utility model is as follows: an arc-extinguishing device for a disconnecting switch, comprising a switch base body and porcelain insulators, wherein there are three sets of porcelain insulators, and the lower parts of the three sets of porcelain insulators are all connected to the switch base body, wherein the bottom of the middle porcelain insulator is hinged to the switch base body and the upper end is connected to an arc-extinguishing device.

[0005] The arc-extinguishing device includes a stationary contact and a moving contact. An arc-initiating rod is connected to the outside of the moving contact, and an arc-initiating spring is connected to the right side of the arc-initiating rod.

[0006] Furthermore, the upper end of each of the three sets of porcelain insulators is connected to a metal frame. An upper terminal is connected above the metal frame on the left side, and a wire is connected to the end of the metal frame on the left side. The other end of the wire is connected to the metal frame in the middle.

[0007] Furthermore, the bottom of the stationary contact is connected to the intermediate metal frame.

[0008] Furthermore, a movable connecting plate is connected above the metal frame on the left side, and the movable connecting plate is connected to one side of the metal frame in the middle.

[0009] Furthermore, one end of the moving contact is connected to the metal frame on the right side.

[0010] Furthermore, a lower terminal block is connected to the end of the metal frame on the right side.

[0011] The advantages of this invention compared to the prior art are as follows: by combining the arc-initiating rod and the arc-initiating spring, it not only effectively suppresses the generation of electric arc, but also accelerates the extinguishing of electric arc, reduces the erosion of the contacts by electric arc, effectively prevents the moving and stationary contacts from overheating during switch operation, protects the surfaces of the moving and stationary contacts from being burned by electric arc, and ensures contact reliability. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of the main structure of an arc-extinguishing device for a disconnecting switch according to the present invention;

[0013] Appendix Figure 2 This is a schematic diagram of the arc-initiating rod of an arc-extinguishing device for a disconnecting switch according to this utility model;

[0014] Appendix Figure 3 This is a schematic diagram of the arc-initiating spring of an arc-extinguishing device for a disconnecting switch according to this utility model.

[0015] As shown in the figure: 1. Switch base body; 2. Porcelain insulator; 3. Metal frame; 4. Upper terminal block; 5. Moving connection plate; 6. Wire; 7. Arc extinguishing device; 8. Stationary contact; 9. Moving contact; 10. Arc ignition rod; 11. Arc ignition spring; 12. Lower terminal block. Detailed Implementation

[0016] 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.

[0017] Combined with appendix Figure 1 To be continued Figure 3 An arc-extinguishing device for a disconnecting switch includes a switch base body 1 and porcelain insulators 2. There are three sets of porcelain insulators 2, all connected to the switch base body 1 at the bottom. The middle porcelain insulator 2 is hinged to the switch base body 1 at the bottom and connected to an arc-extinguishing device 7 at its upper end. The three sets of porcelain insulators 2 support and isolate the conductive parts of the switch from the ground to prevent current leakage and ensure safety. The porcelain insulators themselves have high insulation performance and can withstand high voltage.

[0018] The arc-extinguishing device 7 includes a stationary contact 8 and a moving contact 9. An arc-initiating rod 10 is connected to the outside of the moving contact 9, and an arc-initiating spring 11 is connected to the right side of the arc-initiating rod 10. Furthermore, each of the three sets of porcelain insulators 2 has a metal frame 3 connected to its upper end. An upper terminal 4 is connected to the upper part of the left metal frame 3 for connecting to a high-voltage power supply and bearing current input. A wire 6 is connected to the end of the left metal frame 3, and the other end of the wire 6 is connected to the middle metal frame 3. Current is transmitted to the metal frame 3 through the wire. Furthermore, the bottom of the stationary contact 8 is connected to the middle metal frame 3. Furthermore, a moving connecting plate 5 is connected to the upper part of the left metal frame 3, and the moving connecting plate 5 is connected to one side of the middle metal frame 3. Furthermore, one end of the moving contact 9 is connected to the right metal frame 3. Further, the right-side metal frame 3 is connected to a lower terminal 12. When the switch is closed, the arc-inducing rod 10 and the arc-inducing spring 11 first make contact and conduct, and then the moving contact 9 and the stationary contact 8 of the switch make contact. When the switch is opened, it is then broken by the arc-inducing rod 10 and the arc-inducing spring 11. By opening first and then closing, the moving contact 9 and the stationary contact 8 of the switch are protected from being burned by the electric arc, thus ensuring contact reliability.

[0019] The specific implementation of this utility model is as follows: During use, a high-voltage power supply is connected through the upper terminal 4, and current is transmitted through the wire 6. When the switch is closed, the arc-inducing rod 10 and the arc-inducing spring 11 first make contact and conduct, and then the moving contact 9 and the stationary contact 8 of the switch make contact. When the switch is opened, the arc-inducing rod 10 and the arc-inducing spring 11 break the circuit. By opening first and then closing, the moving contact 9 and the stationary contact 8 of the switch are protected from being burned by the electric arc, thus ensuring contact reliability.

[0020] 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. A disconnecting switch arc extinguishing device comprising a switch base body (1) and a porcelain insulator (2), characterized in that, The porcelain bottle insulator (2) has three groups, three groups of the porcelain bottle insulator (2) are connected below the switch base main body (1), wherein the middle porcelain bottle insulator (2) is hinged at the bottom of the switch base main body (1) and the upper end is connected with the arc extinguishing device (7); The arc extinguishing device (7) includes a static contact (8) and a moving contact (9), the moving contact (9) is connected with an arc rod (10) outside, and the arc rod (10) is connected with an arc vertical spring (11) on the right side.

2. The isolating switch arc extinguishing device according to claim 1, characterized in that Three groups of the porcelain bottle insulator (2) are connected with metal frames (3) on the upper end, the upper side of the left metal frame (3) is connected with an upper terminal (4), and the end of the left metal frame (3) is connected with a wire (6), and the other end of the wire (6) is connected to the middle metal frame (3).

3. A disconnector arc extinguishing device according to claim 2, characterised in that The bottom of the static contact (8) is connected to the middle metal frame (3).

4. The isolating switch arc extinguishing device according to claim 3, characterized in that The upper side of the left metal frame (3) is connected with a moving connection plate (5), and the moving connection plate (5) is connected to one side of the middle metal frame (3).

5. A disconnector arc extinguishing device according to claim 4, characterised in that One end of the moving contact (9) is connected to the right metal frame (3).

6. A disconnector arc extinguishing device according to claim 5, characterised in that The end of the right metal frame (3) is connected with a lower terminal (12).

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