Gas-insulated switchgear vacuum circuit breaker

Abstract

A vacuum circuit breaker of a gas insulated switchgear comprises a first mounting plate and a second mounting plate, a fixing seat, an arc extinguishing mechanism, a rotating seat and a rotating shaft are arranged between the first mounting plate and the second mounting plate, an isolation knife is mounted on the rotating seat, the rotating seat comprises a mounting part, a connecting part and a fixing part which are arranged in a split manner, and the connecting part is connected with the fixing part. One end of the mounting part is rotationally mounted on the rotating shaft, the two sides of the other end of the mounting part are connected with connecting parts which are arranged in an arc shape, the other ends of the connecting parts are connected with the fixing parts, and the connecting parts are fixedly arranged outside the isolation knife in a sleeving mode. The vacuum circuit breaker can greatly improve the bounce performance of the rotating seat during opening and closing, guarantees that the problem of cracking damage caused by overlarge rigidity is avoided, and improves the service life and the use effect of the vacuum circuit breaker.

Description

Technical Field

[0001] The utility model relates to a gas-filled cabinet vacuum circuit breaker, belonging to the field of power components. Background Art

[0002] Gas-insulated metal-enclosed switchgear is referred to as gas-insulated cabinet insulated switchgear. The main switch usually adopts a vacuum circuit breaker with a spring mechanism. The entire cabinet combines air insulation and sulfur hexafluoride gas compartments. It has a compact structure and is expandable, making it suitable for distribution automation.

[0003] The existing inflatable cabinet vacuum circuit breaker has the problem of insufficient strength, and the strength of the two parts that require high strength, the insulation plate and the isolating knife, is insufficient. The rotating seat for mounting the isolating knife is usually formed by integral injection molding. The rotating seat set in this way has too large overall rigidity when the isolating knife switches on and off, which easily causes the rotating seat to crack and be damaged, resulting in a problem of insufficient service life. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a gas-filled cabinet vacuum circuit breaker.

[0005] A gas cabinet vacuum circuit breaker comprises a first mounting plate and a second mounting plate, wherein a fixed seat, an arc extinguishing mechanism, a rotating seat and a rotating shaft are arranged between the first mounting plate and the second mounting plate, an isolating knife is installed on the rotating seat, and the rotating seat comprises a separately arranged mounting portion, a connecting portion and a fixing portion, one end of the mounting portion is rotatably mounted on the rotating shaft, and the other end is connected with connecting portions arranged in a circular arc on both sides, the other end of the connecting portion is connected to the fixing portion, and the connecting portion is fixedly sleeved on the outside of the isolating knife. Compared with a traditional one-piece rotating seat, the separately arranged rotating seat can greatly improve the bounce of the rotating seat when closing and opening the switch, ensure that there will be no cracking damage due to excessive rigidity, and improve the service life and use effect of the vacuum circuit breaker.

[0006] Furthermore, a fixing pin is provided between the connecting parts, and the fixing pin can strengthen the connection strength between the connecting parts to ensure the normal use state of the rotating seat.

[0007] Preferably, the isolating knife includes two connecting arms, one end of the connecting arm is provided with a notch arranged along the length direction of the connecting arm. The notch is provided on the connecting arm to improve the contact effect during temperature rise and ensure the stability of the docking contact between the isolating knife and the static contact and the grounding contact.

[0008] Furthermore, the two ends of the connecting arm are connected to each other by fixing bolts, and compression springs are respectively sleeved on both ends of the fixing bolts. The compression springs abut against the end surface of the connecting arm, and the fixing bolt at one end is fixed in the notch. The disc spring installed on the improved fixing bolt is a compression spring, which has better use effect and stronger elasticity, and has better shock absorption effect when the vacuum circuit breaker is used.

[0009] Furthermore, the arc extinguishing mechanism includes an insulator, and insulating plates connected to the first mounting plate and the second mounting plate are provided in front and behind the insulator. The insulating plate is provided with horizontally arranged reinforcing ribs corresponding to the insulator. Improving the distribution of the reinforcing ribs on the insulating plate can make the insulating plate stronger. Traditional reinforcing ribs are generally arranged vertically, and improving them to a horizontal arrangement can conform to the direction of force and improve the installation strength.

[0010] Furthermore, the number of the reinforcing ribs is at least two, which are arranged at intervals on the insulating plate. The number of the reinforcing ribs can be adjusted according to design requirements, increased or decreased, so as to facilitate adaptation to vacuum circuit breakers of different models and sizes, and has high flexibility.

[0011] Preferably, buckle covers are provided on the upper and lower sides of the reinforcing ribs respectively, and the buckle covers can cover the connection between the internal parts, and also have the function of improving the strength of the insulating board, and the appearance of the product is more beautiful.

[0012] Furthermore, isolation plates located on both sides of the insulators are provided between the insulating plates, and the isolation plates are used to isolate arcs and static electricity generated between the insulators, thereby ensuring safe use, enhancing the isolation effect, and preventing the generated static electricity from affecting normal operation.

[0013] The beneficial effects of the utility model are as follows: compared with the traditional one-piece rotating seat, the separately arranged rotating seat can greatly improve the bounce of the rotating seat when closing and opening the switch, ensuring that there will be no cracking and damage due to excessive rigidity, thereby improving the service life and use effect of the vacuum circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0015] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 for Figure 1 A magnified detail of the center point A;

[0017] Figure 3 It is a front view of the utility model;

[0018] In the figure, 1. first mounting plate; 2. second mounting plate; 3. fixing seat; 4. arc extinguishing mechanism; 41. insulator; 411. insulating plate; 412. reinforcing rib; 413. buckle cover; 414. isolation plate; 5. rotating seat; 51. mounting part; 52. connecting part; 521. fixing pin; 53. fixing part; 6. isolating knife; 61. connecting arm; 611. notch; 612. fixing bolt; 613. compression spring; 7. rotating shaft. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0020] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0021] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0022] like Figure 1-3 As shown, an embodiment of an inflatable cabinet vacuum circuit breaker of the utility model comprises a first mounting plate 1 and a second mounting plate 2, wherein a fixed seat 3, an arc extinguishing mechanism 4, a rotating seat 5 and a rotating shaft 7 are arranged between the first mounting plate 1 and the second mounting plate 2, an isolating knife 6 is installed on the rotating seat 5, and the rotating seat 5 comprises a separately arranged mounting portion 51, a connecting portion 52 and a fixing portion 53, one end of the mounting portion 51 is rotatably mounted on the rotating shaft 7, and the other end is connected with connecting portions 52 arranged in a circular arc on both sides, the other end of the connecting portion 52 is connected to the fixing portion 53, and the connecting portion 52 is fixedly sleeved on the outside of the isolating knife 6. The separately arranged rotating seat 5 can greatly improve the bouncing property of the rotating seat 5 when closing and opening the switch, compared with the traditional one-piece rotating seat 5, to ensure that there will be no cracking damage due to excessive rigidity, thereby improving the service life and use effect of the vacuum circuit breaker.

[0023] A fixing pin 521 is provided between the connecting parts 52 , and the fixing pin 521 can strengthen the connection strength between the connecting parts 52 , thereby ensuring that the rotating seat 5 is in a normal use state.

[0024] The isolation knife 6 includes two connecting arms 61, one end of which is provided with a notch 611 arranged along the length direction of the connecting arm 61. The notch 611 is arranged on the connecting arm 61 to improve the contact effect during temperature rise and ensure the stability of the isolation knife 6 in docking contact with the static contact and the grounding contact.

[0025] The two ends of the connecting arm 61 are connected to each other by a fixing bolt 612, and compression springs 613 are respectively sleeved on both ends of the fixing bolt 612. The compression spring 613 abuts against the end surface of the connecting arm 61, and the fixing bolt 612 at one end is fixed in the notch 611. The disc spring installed on the improved fixing bolt 612 is a compression spring 613, which has a better use effect and stronger elasticity, and has a better shock absorption effect when the vacuum circuit breaker is used.

[0026] The arc extinguishing mechanism 4 includes an insulator 41, and an insulating plate 411 connected to the first mounting plate 1 and the second mounting plate 2 is provided in front and behind the insulator 41. The insulating plate 411 is provided with horizontally arranged reinforcing ribs 412 corresponding to the insulator 41. Improving the distribution of the reinforcing ribs 412 on the insulating plate 411 can make the insulating plate 411 stronger. Traditional reinforcing ribs 412 are generally vertically arranged, and improving them to be horizontally arranged can conform to the direction of force and improve the installation strength.

[0027] There are at least two reinforcing ribs 412 , which are spaced apart on the insulating plate 411 . The number of reinforcing ribs 412 can be adjusted according to design requirements, and can be increased or decreased, so as to facilitate adaptation to vacuum circuit breakers of different models and sizes, and has high flexibility.

[0028] Buckle covers 413 are provided on the upper and lower sides of the reinforcing rib 412 respectively. The buckle covers 413 can cover the connection between the internal parts and also have the function of improving the strength of the insulating plate 411, and the appearance of the product is more beautiful.

[0029] Isolation plates 414 are provided between the insulating plates 411 and located on both sides of the insulators 41 . The isolation plates 414 are used to isolate arcs and static electricity generated between the insulators 41 , thereby ensuring safe use, enhancing the isolation effect, and preventing the generated static electricity from affecting normal operation.

[0030] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A gas-filled cabinet vacuum circuit breaker, characterized in that: It includes a first mounting plate and a second mounting plate, a fixed seat, an arc extinguishing mechanism, a rotating seat and a rotating shaft are arranged between the first mounting plate and the second mounting plate, an isolating knife is installed on the rotating seat, and the rotating seat includes a mounting part, a connecting part and a fixing part which are separately arranged, one end of the mounting part is rotatably mounted on the rotating shaft, and the other end is connected with connecting parts arranged in a circular arc on both sides, the other end of the connecting part is connected to the fixing part, and the connecting part is fixedly sleeved on the outside of the isolating knife.

2. The inflatable cabinet vacuum circuit breaker according to claim 1, characterized in that: A fixing pin is arranged between the connecting parts.

3. The inflatable cabinet vacuum circuit breaker according to claim 1, characterized in that: The isolation knife comprises two connecting arms, and one end of the connecting arm is provided with a notch arranged along the length direction of the connecting arm.

4. The inflatable cabinet vacuum circuit breaker according to claim 3, characterized in that: The two ends of the connecting arm are connected to each other by fixing bolts, and compression springs are respectively sleeved on the two ends of the fixing bolts. The compression springs abut against the end surface of the connecting arm, and the fixing bolt at one end is fixed in the notch.

5. The inflatable cabinet vacuum circuit breaker according to claim 1, characterized in that: The arc extinguishing mechanism comprises an insulator, wherein insulating plates connected to the first mounting plate and the second mounting plate are arranged at the front and rear of the insulator, and reinforcing ribs arranged horizontally and corresponding to the insulator are arranged on the insulating plate.

6. The inflatable cabinet vacuum circuit breaker according to claim 5, characterized in that: The number of the reinforcing ribs is at least two, and the reinforcing ribs are arranged on the insulating plate at intervals.

7. The inflatable cabinet vacuum circuit breaker according to claim 5 or 6, characterized in that: Buckle covers are respectively arranged on the upper and lower sides of the reinforcing rib.

8. The inflatable cabinet vacuum circuit breaker according to claim 5, characterized in that: Isolation plates located on both sides of the insulator are arranged between the insulation plates.

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