Environment-friendly gas insulated circuit breaker with uniform electric field distribution

Abstract

The utility model discloses an environment-friendly gas insulated circuit breaker with uniform electric field distribution, which relates to the technical field of environment-friendly gas insulated circuit breakers and comprises a circuit breaker shell, a permanent magnet mechanism is arranged in the circuit breaker shell and used for quick assembly, and the permanent magnet mechanism comprises a manual opening assembly, a permanent magnet and a permanent magnet, the assembling assembly is arranged in the circuit breaker shell, the side plate is in lap joint with a boss of the top plate in a lock catch mode, the top plate is in lap joint with a boss of the upper isolation knife holder in a lock catch mode, and the isolation baffle is installed on the top of the top plate in a sliding mode. The vacuum arc-extinguishing chamber insulation baffle plate and the side plate are installed together through the tenons on the two sides and the mortises formed in the side plate, no metal piece can be seen from the appearance of the whole switch insulation plate, the overall weight is reduced, the assembly process is simpler and more convenient, and the production cost is reduced only by carrying out tenon-and-mortise lap joint according to a drawing. And permanent damage to the insulating plate due to a traditional bolt fixing mode is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of environmentally friendly gas-insulated circuit breakers, in particular to an environmentally friendly gas-insulated circuit breaker with uniform electric field distribution. Background Art

[0002] Environmentally friendly gas insulated circuit breaker is a new type of high-voltage circuit breaker that uses environmentally friendly gas as insulation and arc extinguishing medium. This circuit breaker uses a fully enclosed gas chamber filled with environmentally friendly gas at a certain pressure for insulation, and no longer uses SF6 gas as an external insulation medium. Therefore, it does not pollute the environment and is safer and more environmentally friendly.

[0003] According to the patent name: an environmentally friendly gas-insulated vacuum circuit breaker (patent publication number: CN214314231U, patent publication date: 2021-09-28), it includes a metal frame, a circuit breaker, a disconnector and a grounding switch, one end of the metal frame is provided with an upper incoming line terminal, and the other end is provided with the circuit breaker; the disconnector includes a disconnector seat, an disconnector operating shaft, a disconnector static contact and a disconnector moving contact, the disconnector static contact is connected to the upper incoming line terminal, the disconnector seat is arranged at the upper end of the circuit breaker, the disconnector moving contact is hinged on the disconnector seat, the disconnector operating shaft is passed through the metal frame, the disconnector operating shaft is connected with an operating arm, an insulating pull rod is connected between the operating arm and the disconnector moving contact, and the disconnector moving contact corresponds to the disconnector static contact in one position. The utility model solves safety hazards and improves overall safety.

[0004] Based on the above-mentioned prior art, the existing environmentally friendly gas insulated circuit breakers with uniform electric field distribution still have the following problems: in order to ensure the smoothness and cleanliness of the plate surface, while the fixing strength between the plates is not affected and the surface is not damaged, bolts and gaskets are often used, and the vertical connection parts are fixed with angle steels. The use of a large number of metal parts will cause fatigue damage to the processing of the plate, and the process flow is cumbersome, which affects the quality of the finished plate and further affects the insulation. For this reason, the utility model provides an environmentally friendly gas insulated circuit breaker with uniform electric field distribution. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an environmentally friendly gas insulated circuit breaker with uniform electric field distribution, which solves the following problems existing in the existing environmentally friendly gas insulated circuit breakers with uniform electric field distribution: in order to ensure the smoothness and cleanliness of the surface of the plate, while the fixing strength between the plates is not affected and the surface is not damaged, bolts and gaskets are often used, and the vertical connection parts are fixed with angle steels. The use of a large number of metal parts will cause fatigue damage to the processing of the plate, and the process flow is cumbersome, which affects the quality of the finished plate and further affects the insulation.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: an environmentally friendly gas insulated circuit breaker with uniform electric field distribution, comprising a circuit breaker housing, wherein a permanent magnetic mechanism is arranged inside the circuit breaker housing for rapid assembly, and the permanent magnetic mechanism includes:

[0007] The manual opening assembly is arranged inside the circuit breaker housing, and includes mounting side plates fixedly mounted on the left and right sides of the circuit breaker housing;

[0008] An assembly component is arranged inside the circuit breaker housing, comprising a side plate overlapped on the inner side of the mounting side plate through a boss lock, the top boss lock of the side plate overlaps the top plate, and three upper isolating knife seats are fixedly installed on the top of the top plate, four isolating baffles are slidably installed on the top of the top plate, the rear side of the side plate is installed with a vacuum arc extinguishing chamber insulating baffle through mortise and tenon joints opened on the side plate itself, and the front mortise and tenon joints of the side plate are installed with a core body.

[0009] Preferably, the manual opening brake assembly also includes a manual opening brake shaft that rotates and passes through the mounting side plate.

[0010] Preferably, the permanent magnet mechanism also includes an isolation knife seat support plate bolted onto the top plate of the movement body, an isolation moving knife fixing plate is movably mounted on the top of the isolation knife seat support plate, and the isolation moving knife fixing plate is fixedly sleeved with the isolation knife.

[0011] Preferably, the permanent magnet mechanism also includes a permanent magnet mechanism side baffle plate installed by mortise and tenon on the front side of the side plate, the bottom boss lock-jointed with the permanent magnet mechanism support plate, and the top boss lock-jointed with the permanent magnet mechanism second side baffle plate.

[0012] Preferably, the permanent magnet mechanism further comprises a grounding copper bar installed on the front side of the side plate by mortise and tenon joints, and three conductive rods are fixedly installed on the bottom of the grounding copper bar.

[0013] Preferably, both ends of the top plate are fixedly connected to the top ends of the mounting side plates by bolts.

[0014] The utility model provides an environmentally friendly gas-insulated circuit breaker with uniform electric field distribution. Compared with the prior art, it has the following beneficial effects:

[0015] (1) The environmentally friendly gas insulated circuit breaker with uniform electric field distribution is provided with an assembly component. The side plate is overlapped with the top plate boss by locking, the top plate is overlapped with the upper isolating knife seat boss by locking, the isolating baffle is slidably installed on the top of the top plate, and the vacuum interrupter insulating baffle is installed with the side plate mortise and tenon by the tenons on both sides and the mortise holes opened on the side plate itself. From the appearance, no metal parts can be seen on the entire switch insulating plate, the overall weight is reduced, and the assembly process is simpler. It only needs to be overlapped according to the drawing, thereby avoiding permanent damage to the insulating plate due to the traditional bolt fixing method.

[0016] (2) The environmentally friendly gas-insulated circuit breaker with uniform electric field distribution has no suspended electrodes. Compared with the traditional gas cabinet insulation board layout on the market, this insulation board design will not cause uneven local field strength due to the induction electricity generated by the suspended metal potential in the strong electric field between high voltage and ground, which will cause excessive accumulation of partial discharge and insulation breakdown accidents. After the partial discharge test meets the requirements, this structural optimization design will greatly improve the service life of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the three-dimensional structure of the device of the utility model;

[0018] Figure 2 This is a front view of the three-dimensional structure of the permanent magnet mechanism of the utility model;

[0019] Figure 3 It is a three-dimensional structural diagram of the assembly components of the utility model.

[0020] In the figure: 1-circuit breaker housing, 2-permanent magnetic mechanism, 21-assembly component, 211-side plate, 212-vacuum interrupter insulation baffle, 213-top plate, 214-upper isolation knife seat, 215-isolation baffle, 22-isolation knife assembly, 221-isolation knife seat support plate, 222-isolation moving knife fixing plate, 223-isolation knife, 23-support component, 231-permanent magnetic mechanism side baffle, 232-permanent magnetic mechanism support plate, 233-permanent magnetic mechanism second side baffle, 24-manual opening assembly, 241-installation side plate, 242-manual opening shaft, 25-grounding component, 251-grounding copper bar, 252-conductive rod, 26-movement body. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-3 , the utility model provides a technical solution:

[0023] An environmentally friendly gas-insulated circuit breaker with uniform electric field distribution includes a circuit breaker housing 1, wherein a permanent magnetic mechanism 2 is arranged inside the circuit breaker housing 1 for rapid assembly, and the permanent magnetic mechanism 2 includes:

[0024] The manual trip assembly 24 is arranged inside the circuit breaker housing 1, and includes mounting side plates 241 fixedly mounted on the left and right sides of the circuit breaker housing 1. The manual trip assembly 24 also includes a manual trip shaft 242 that rotates and penetrates the mounting side plates 241.

[0025] The assembly component 21 is arranged inside the circuit breaker housing 1, and includes a side plate 211 overlapped on the inner side of the mounting side plate 241 through a boss lock, the top boss lock of the side plate 211 overlaps with a top plate 213, and three upper isolation knife seats 214 are fixedly installed on the top of the top plate 213, and four isolation baffles 215 are slidably installed on the top of the top plate 213, and the rear side of the side plate 211 is installed with a vacuum interrupter insulation baffle 212 through mortise and tenon joints opened in the side plate 211 itself, and the front mortise and tenon joints of the side plate 211 are installed with a core body 26, and the core body 26 is completely covered by the insulating plate as a whole without any screws. The two ends are fixedly connected to the top of the mounting side plate 241 by bolts, and the assembly component 21 is provided, the side plate 211 is overlapped with the boss lock of the top plate 213, the top plate 213 is overlapped with the boss lock of the upper isolation knife seat 214, and the isolation baffle 215 is slidably installed on the top of the top plate 213, and the vacuum arc chamber insulating baffle 212 is installed together with the side plate 211 by the tenons on both sides and the mortise holes opened in the side plate 211 itself. From the appearance, no metal parts can be seen on the entire switch insulation board, the overall weight is reduced, and the assembly process is simpler. It only needs to perform mortise and tenon overlap according to the drawing, avoiding permanent damage to the insulation board due to the traditional bolt fixing method.

[0026] In this embodiment, the permanent magnet mechanism 2 also includes an isolation knife seat support plate 221 bolted onto the top plate of the movement body 26, and an isolation movable knife fixing plate 222 is movably installed on the top of the isolation knife seat support plate 221. The isolation movable knife fixing plate 222 is fixedly sleeved with an isolation knife 223. All high-voltage live bodies are designed with chamfered corners, and the parts of the plates that contact the high-voltage live bodies are designed with rounded corners to avoid local field strength concentration.

[0027] In this embodiment, the permanent magnet mechanism 2 also includes a permanent magnet mechanism side baffle 231 installed by mortise and tenon on the front side of the side plate 211, the bottom boss lock of the permanent magnet mechanism side baffle 231 is overlapped with the permanent magnet mechanism support plate 232, and the top boss lock of the permanent magnet mechanism support plate 232 is overlapped with the second side baffle 233 of the permanent magnet mechanism, which is used to support the entire mechanism. Except for the grounding part, the entire mechanism must use metal bolts to fix the insulating plate and the grounding, and the rest are all overlapped by the mortise and tenon of the plate itself. At the same time, the grounding bolt is far away from the high-voltage charged body and will not produce partial discharge.

[0028] In this embodiment, the permanent magnet mechanism 2 also includes a grounding copper bar 251 installed on the front of the side plate 211 by mortise and tenon joints, and three conductive rods 252 are fixedly installed at the bottom of the grounding copper bar 251. Since there is no suspended electrode, compared with the traditional gas cabinet insulation board layout on the market, this insulation board design will not cause uneven local field strength due to the induction electricity generated by the suspended metal potential in the strong electric field of the high voltage to the ground, and the accumulation of excessive partial discharge and insulation breakdown accidents over time. After the partial discharge test meets the requirements, this structural optimization design will greatly improve the service life of the circuit breaker.

[0029] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0030] During operation, first install the two mounting side plates 241 on the left and right sides of the inside of the circuit breaker housing 1, then overlap and install the two ends of the side plate 211 with the two mounting side plates 241 through the boss lock, overlap and install the top plate 213 on the top of the side plate 211 through the boss lock, then install the three upper isolation knife seats 214 on the top of the top plate 213, slide the four isolation baffles 215 on the top of the top plate 213, and then lock the permanent magnet mechanism side baffle 231, the permanent magnet mechanism support plate 232, and the permanent magnet mechanism second side baffle 233 through the boss lock. The assembled components are installed together by overlapping and snapping, and then the side baffle 231 of the permanent magnet mechanism is installed on the front of the side panel 211 by mortise and tenon joints, and then the grounding copper busbar 251 is installed on the front of the side panel 211 by mortise and tenon joints, and at the same time, the top ends of the three conductive rods 252 are installed on the bottom of the grounding copper busbar 251, and then the movement body 26 is installed on the front of the side panel 211 by mortise and tenon joints, and then the three isolation knives 223 pass through the isolation moving knife fixing plate 222, and the isolation knife 223 is installed on the top plate of the movement body 26 through the isolation knife knife seat support plate 221 to complete the installation.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly gas-insulated circuit breaker with uniform electric field distribution, comprising a circuit breaker housing (1), characterized in that: A permanent magnetic mechanism (2) is arranged inside the circuit breaker housing (1) for quick assembly, and the permanent magnetic mechanism (2) comprises: A manual opening assembly (24) is arranged inside the circuit breaker housing (1), comprising mounting side plates (241) fixedly mounted on left and right sides of the inside of the circuit breaker housing (1); An assembly component (21) is arranged inside a circuit breaker housing (1), comprising a side plate (211) overlapped on the inner side of an installation side plate (241) via a boss lock, a top plate (213) overlapped on the top boss lock of the side plate (211), and three upper isolation knife seats (214) are fixedly mounted on the top of the top plate (213), four isolation baffles (215) are slidably mounted on the top of the top plate (213), a vacuum arc extinguishing chamber insulation baffle (212) is mounted on the rear side of the side plate (211) via mortise and tenon joints provided on the side plate (211), and a core body (26) is mounted on the front mortise and tenon joints of the side plate (211).

2. The environmentally friendly gas insulated circuit breaker with uniform electric field distribution according to claim 1, characterized in that: The manual opening brake assembly (24) further comprises a manual opening brake shaft (242) which rotates and passes through the mounting side plate (241).

3. The environmentally friendly gas insulated circuit breaker with uniform electric field distribution according to claim 1, characterized in that: The permanent magnet mechanism (2) further comprises an isolation knife seat support plate (221) bolted onto the top plate of the movement body (26), an isolation movable knife fixing plate (222) being movably mounted on the top of the isolation knife seat support plate (221), and an isolation knife (223) being fixedly sleeved on the isolation movable knife fixing plate (222).

4. The environmentally friendly gas insulated circuit breaker with uniform electric field distribution according to claim 1, characterized in that: The permanent magnet mechanism (2) further comprises a permanent magnet mechanism side baffle (231) mounted on the front side of the side plate (211) by means of mortise and tenon joints, the bottom boss of the permanent magnet mechanism side baffle (231) being locked and overlapped with the permanent magnet mechanism support plate (232), and the top boss of the permanent magnet mechanism support plate (232) being locked and overlapped with the permanent magnet mechanism second side baffle (233).

5. The environmentally friendly gas insulated circuit breaker with uniform electric field distribution according to claim 1, characterized in that: The permanent magnet mechanism (2) further comprises a grounding copper bar (251) mounted on the front side of the side plate (211) by mortise and tenon joints, and three conductive rods (252) are fixedly mounted on the bottom of the grounding copper bar (251).

6. The environmentally friendly gas insulated circuit breaker with uniform electric field distribution according to claim 1, characterized in that: Both ends of the top plate (213) are fixedly connected to the top ends of the mounting side plates (241) via bolts.

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