A 40.5kv upper isolation circuit breaker three-position combined electrical appliance for an air chamber

Abstract

The utility model relates to a 40.5kV upper isolation circuit breaker three position combination electric appliance for inflation cabinet, including assembly board, circuit breaker module, three position module, main circuit module, circuit breaker module and three position module set up in the front side of assembly board, circuit breaker module sets up in the lower side part of assembly board, three position module sets up in the upper side part of assembly board, main circuit module sets up in the back of assembly board, the operating shaft of circuit breaker module is connected the main shaft of circuit breaker module through the draw -in plate, the main shaft sets up below circuit breaker module, the main shaft passes through assembly board and extends to the back of assembly board, three groups of main shaft crank of on the main shaft are connected with the insulating pull rod of vacuum arc extinguish chamber of main circuit module respectively. The utility model has carried out the modularization optimization design to circuit breaker module and three position module and main circuit module, makes the overall layout of combination electric appliance more compact, and can make the insulation performance of combination electric appliance improve, and the assembly and maintenance are more simple and convenient, and the electric field distribution is more uniform, and the performance of combination electric appliance is more reliable.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker switching technology, and in particular to a three-position combination electrical appliance for an upper isolating circuit breaker. Background Technology

[0002] Three-position circuit breaker switchgear is a key device in power systems used for isolating and controlling circuits. It typically includes a circuit breaker module, a three-position switch module, and a main circuit module. In the present technology, three-position circuit breaker switchgear has a wide range of applications, such as in gas-insulated switchgear. However, existing three-position circuit breaker switchgear has a complex and non-compact structure, resulting in a large gas-insulated switchgear volume, low internal space utilization, and inconvenience for assembly and maintenance. Therefore, improvements are needed. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of existing combined electrical appliances described in the background art, and to provide a three-position combined electrical appliance for a 40.5kV upper isolating circuit breaker for gas-filled switchgear.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A 40.5kV upper-disconnecting circuit breaker three-position switchgear for gas-insulated switchgear includes an assembly plate, a circuit breaker module, a three-position module, and a main circuit module. The circuit breaker module and the three-position module are located on the front side of the assembly plate, the lower side of the assembly plate, the upper side of the assembly plate, and the rear side of the assembly plate. The operating shaft of the circuit breaker module is connected to the main shaft of the circuit breaker module via a pull plate. The main shaft is located below the circuit breaker module and passes through the assembly plate, extending to the rear of the assembly plate. On the side, three sets of spindle cranks are distributed on the main spindle. The three sets of spindle cranks are movably connected to the ends of the insulating pull rods of the vacuum interrupter of the main circuit module. The working shaft of the three-station module extends to the rear side of the assembly plate. The working shaft is connected to the three sets of isolating switches of the main circuit module. The isolating switches are movably connected to the copper support. The terminal at the top of the vacuum interrupter is fixedly connected to the upper outgoing copper busbar. The outer end of the upper outgoing copper busbar is fixedly connected to the copper support. The main circuit module is also equipped with a grounding busbar. The grounding busbar is equipped with three sets of isolating contacts corresponding to the three sets of isolating switches.

[0005] In the above design, a tripping spring assembly and a buffer are provided on the mounting plate. A crank arm is connected to the main shaft, and the crank arm has three connecting terminals. The first connecting terminal is movably connected to the lower end of the pull plate, the second connecting terminal is movably connected to the end of the telescopic shaft of the buffer, and the third connecting terminal is movably connected to the end of the tripping spring assembly. This design reduces the rotational speed of the circuit breaker's main shaft, avoids severe vibration, and makes the closing and opening operations of the circuit breaker more reliable.

[0006] In the above scheme, a main circuit module assembly frame is provided on the rear side of the assembly plate, and the main circuit module is assembled on the main circuit module assembly frame. A vacuum interrupter assembly seat is provided at the lower part of the main circuit module assembly frame. Three sets of vacuum interrupters are fixedly installed on the vacuum interrupter assembly seat. The main shaft of the circuit breaker module is located below the vacuum interrupter assembly seat. Three sets of main shaft crank arms on the main shaft are movably connected to the insulating pull rods at the lower ends of the three sets of vacuum interrupters. A grounding busbar mounting seat is provided at the upper part of the main circuit module assembly frame. The grounding busbar is fixedly installed on the grounding busbar mounting seat. A bearing seat is provided above the grounding busbar mounting seat. The rear end of the working shaft of the three-station module is movably connected to the bearing seat. A lower lead-out copper busbar connecting seat is also provided on the main circuit module assembly frame. The lower lead-out ends on the side walls of the three sets of vacuum interrupters are connected to the lower lead-out copper busbars. The lower lead-out copper busbars are fixedly connected to the insulating columns on the lower lead-out copper busbar connecting seat. This configuration simplifies the structure of the main circuit module, allows it to match the upper isolation structure, makes the connection between the main circuit module and the circuit breaker module and the three-position module easier, and further improves the operational reliability of the circuit breaker module and the three-position module.

[0007] In the above solution, the shell of the vacuum interrupter is made of nylon insulation. This design reduces the cost of the vacuum interrupter while ensuring its electrical performance. Furthermore, compared to existing epoxy-shelled vacuum interrupters, nylon is biodegradable, thus avoiding environmental pollution.

[0008] In the above scheme, an interlocking component is provided between the three-position module and the circuit breaker module. By setting the interlocking mechanism, the operation between the three-position module and the circuit breaker module can conform to the required operating logic, ensuring operational safety and avoiding misoperation.

[0009] This invention offers several advantages: The gas-insulated switchgear utilizes a 40.5kV three-position upper-isolation circuit breaker combined electrical appliance. Modular optimization design of the circuit breaker module, three-position module, and main circuit module results in a more scientific and rational overall layout, a more compact structure, and improved insulation performance. With a rated voltage of 40.5kV, a maximum current of 1250A, and a maximum breaking current of 31.5kA, the switchgear width is only 500mm, simplifying assembly and maintenance, resulting in a more uniform electric field distribution and more reliable performance. Furthermore, the three-position upper-isolation circuit breaker combined electrical appliance places the isolation module on the upper side of the assembly plate and the circuit breaker module on the lower side. This design makes the appliance particularly suitable for power systems requiring an upper isolation structure. The optimized design of the main circuit module ensures compatibility with the upper isolation structure, simplifying the connection between the main circuit module, circuit breaker module, and three-position module, and further improving the operational reliability of the circuit breaker module and three-position module. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the front structure of the three-position combination electrical appliance of the 40.5kV upper isolating circuit breaker for the gas-insulated switchgear of this utility model.

[0011] Figure 2 This is a schematic diagram of the left side of the three-position combination electrical appliance of the 40.5kV upper isolating circuit breaker for the gas-insulated switchgear of this utility model.

[0012] Figure 3 This is a schematic diagram of the right side of the three-position combination electrical appliance of the 40.5kV upper isolating circuit breaker for the gas-insulated switchgear of this utility model.

[0013] Figure 4 This is a schematic diagram of the upper structure of the three-position combination electrical appliance of the 40.5kV upper isolating circuit breaker for the gas-insulated switchgear of this utility model.

[0014] Figure 5 This is a schematic diagram of the lower structure of the three-position combined electrical appliance of the 40.5kV upper isolating circuit breaker for the gas-insulated switchgear of this utility model (partial structure of the main circuit module assembly frame is not shown).

[0015] The attached diagram is labeled as follows: Assembly plate 1, trip spring assembly 11, buffer 12, crank arm 13, pull plate 14, circuit breaker module 2, main shaft 21, operating shaft 22, main shaft crank arm 23, three-position module 3, working shaft 31, main circuit module 4, isolating switch 41, copper support 42, upper outgoing copper busbar 43, grounding busbar 44, isolating contact 45, main circuit module assembly frame 46, vacuum interrupter assembly seat 47, grounding busbar mounting seat 48, lower outgoing copper busbar 49, lower outgoing copper busbar connecting seat 491, insulating column 492; interlocking assembly 5, vacuum interrupter 6, insulating pull rod 61. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below through embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] like Figure 1-5 As shown, the gas-insulated switchgear of this utility model uses a 40.5kV upper isolating circuit breaker three-position combination electrical appliance, including an assembly plate 1, a circuit breaker module 2, a three-position module 3, and a main circuit module 4.

[0018] Assembly plate 1 can be a flat plate with the required strength, such as an assembly plate made of aluminum alloy.

[0019] like Figure 1 As shown, circuit breaker module 2 and three-station module 3 are located on the front side of assembly plate 1, circuit breaker module 2 is located on the lower side of assembly plate 1, and three-station module 3 is located on the upper side of assembly plate 1. Figure 2 As shown, the main circuit module 4 is located on the rear side of the assembly plate 1.

[0020] like Figure 1 The area within the dashed box 2 is the circuit breaker module 2, and the area within the dashed box 3 is the three-station module 3. The specific structures of the circuit breaker module 2 and the three-station module 3 can adopt the existing circuit breaker module structure, such as the circuit breaker module and three-station module structure disclosed in the patent with publication number CN111900051A.

[0021] An interlocking component 5 is provided between circuit breaker module 2 and three-position module 3, such as... Figure 1 The area within the dashed box 5 is the interlocking component 5. The configuration of the interlocking component 5 can be designed according to the interlocking requirements of the power system. For example, the interlocking structure disclosed in the patent with publication number CN111900051A can be adopted.

[0022] Circuit breaker module 2 is located on the lower side of assembly plate 1, and three-station module 3 is located on the upper side of circuit breaker module 2. The operating shaft 22 of circuit breaker module 2 is connected to the main shaft 21 of circuit breaker module 2 through pull plate 14. The main shaft 21 of circuit breaker module 2 is located below the operating shaft 22. A trip spring assembly 11 and a buffer 12 are provided on the front side of assembly plate 1. A crank arm 13 is connected to the main shaft 21. The crank arm 13 is provided with three connecting terminals. The first connecting terminal is movably connected to the lower end of the pull plate 14, the second connecting terminal is movably connected to the end of the telescopic shaft of the buffer 12, and the third connecting terminal is movably connected to the end of the trip spring assembly 11.

[0023] The main shaft 21 of the circuit breaker module 2 passes through the assembly plate 1 and extends to the rear side of the assembly plate 1. Three sets of main shaft crank arms 23 are distributed on the main shaft 21. The three sets of main shaft crank arms 23 are respectively movably connected to the ends of the insulating pull rods 61 of the three sets of vacuum interrupters 6 of the main circuit module 4. The working shaft 31 of the three-station module 3 extends to the rear side of the assembly plate 1. The working shaft 31 is connected to the three sets of isolating switches 41 of the main circuit module 4. The isolating switches 41 are movably connected to the copper support 42. The terminal at the top of the vacuum interrupter 6 is fixedly connected to the upper outgoing copper busbar 43. The outer end of the upper outgoing copper busbar 43 is fixedly connected to the copper support 42. The main circuit module 4 is also provided with a grounding busbar 44. The grounding busbar 44 is provided with three sets of isolating contacts 45 corresponding to the three sets of isolating switches 41.

[0024] A main circuit module assembly frame 46 is provided on the rear side of the assembly plate 1. The main circuit module 4 is assembled on the main circuit module assembly frame 46. A vacuum interrupter assembly seat 47 is provided at the lower part of the main circuit module assembly frame 46. Three sets of vacuum interrupters 6 are fixedly installed on the vacuum interrupter assembly seat 47. The main shaft 21 of the circuit breaker module 2 is located below the vacuum interrupter assembly seat 47. The three sets of main shaft crank arms 23 on the main shaft 21 are respectively movably connected to the insulating tie rods at the lower ends of the three sets of vacuum interrupters 6. The upper part of the assembly frame 46 is provided with a grounding busbar mounting seat 48, and a grounding busbar 44 is fixedly mounted on the grounding busbar mounting seat 48. A bearing seat is provided above the grounding busbar mounting seat 48. The rear end of the working shaft 31 of the three-station module 3 is movably connected to the bearing seat. The main circuit module assembly frame 46 is also provided with a lower outgoing copper busbar connecting seat 491. The lower outgoing ends on the side walls of the three sets of vacuum interrupters 6 are connected to lower outgoing copper busbars 49, and the lower outgoing copper busbars 49 are fixedly connected to the insulating posts 492 on the lower outgoing copper busbar connecting seat 491. This arrangement simplifies the structure of the main circuit module 4, makes the main circuit module 4 compatible with the upper isolation structure, makes the connection between the main circuit module 4 and the circuit breaker module 2 and the three-station module 3 easier, and further improves the operational reliability of the circuit breaker module 2 and the three-station module 3.

[0025] The vacuum interrupter 6 can be an existing vacuum interrupter. The shell of the vacuum interrupter 6 is preferably made of nylon insulation, for example, the vacuum interrupter with publication number CN119742201A can be selected. This design reduces the cost of the vacuum interrupter 6 while ensuring its electrical performance. Furthermore, compared to existing epoxy-shelled vacuum interrupters, nylon material has the advantage of being biodegradable, thus avoiding environmental pollution.

[0026] This utility model discloses a 40.5kV three-position switchgear with an upper isolating circuit breaker. The circuit breaker module, three-position module, and main circuit module have undergone modular optimization design, resulting in a more scientific and rational overall layout, a more compact structure, improved insulation performance, a withstand voltage of 40.5kV, easier assembly and maintenance, more uniform electric field distribution, and more reliable performance. The upper isolating circuit breaker three-position switchgear of this utility model places the isolation module on the upper side of the assembly plate and the circuit breaker module on the lower side. This structure makes the switchgear particularly suitable for power system applications requiring an upper isolation structure. Through optimized design of the main circuit module, it is matched with the upper isolation structure, simplifying the connection between the main circuit module, circuit breaker module, and three-position module, and further improving the operational reliability of the circuit breaker module and three-position module.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-position switchgear for a gas-insulated switchgear with a 40.5kV upper disconnect circuit breaker, characterized in that, The system includes an assembly plate, a circuit breaker module, a three-station module, and a main circuit module. The circuit breaker module and the three-station module are located on the front side of the assembly plate, the lower side of the assembly plate, the upper side of the three-station module, and the rear side of the assembly plate. The operating shaft of the circuit breaker module is connected to its main shaft via a pull plate. The main shaft is located below the circuit breaker module, passes through the assembly plate, and extends to the rear side of the assembly plate. Three sets of main shafts are distributed on the main shaft. The crank arm, with three sets of main shaft crank arms, is movably connected to the end of the insulating pull rod of the vacuum interrupter of the main circuit module. The working shaft of the three-station module extends to the rear side of the assembly plate and is connected to the three sets of isolating switches of the main circuit module. The isolating switches are movably connected to the copper support. The terminal at the top of the vacuum interrupter is fixedly connected to the upper outgoing copper busbar. The outer end of the upper outgoing copper busbar is fixedly connected to the copper support. The main circuit module is also equipped with a grounding busbar, which has three sets of isolating contacts corresponding to the three sets of isolating switches.

2. The 40.5kV upper-isolation circuit breaker three-position combination electrical appliance for gas-insulated switchgear according to claim 1, characterized in that: The assembly plate is provided with a brake spring assembly and a buffer. A crank arm is connected to the main shaft. The crank arm is provided with three connecting terminals. The first connecting terminal is movably connected to the lower end of the pull plate, the second connecting terminal is movably connected to the end of the telescopic shaft of the buffer, and the third connecting terminal is movably connected to the end of the brake spring assembly.

3. The 40.5kV upper-isolation circuit breaker three-position combination electrical appliance for gas-insulated switchgear according to claim 1, characterized in that: The rear side of the assembly plate is provided with a main circuit module assembly frame, on which the main circuit module is assembled. The lower part of the main circuit module assembly frame is provided with a vacuum interrupter assembly seat. Three sets of vacuum interrupters are fixedly installed on the vacuum interrupter assembly seat. The main shaft of the circuit breaker module is located below the vacuum interrupter assembly seat. The three sets of main shaft crank arms on the main shaft are movably connected to the insulating pull rods at the lower ends of the three sets of vacuum interrupters. The upper part of the main circuit module assembly frame is provided with a grounding busbar mounting seat, on which the grounding busbar is fixedly installed. Above the grounding busbar mounting seat is a bearing seat. The rear end of the working shaft of the three-station module is movably connected to the bearing seat. The main circuit module assembly frame is also provided with a lower lead-out copper busbar connecting seat. The lower lead-out ends on the side walls of the three sets of vacuum interrupters are connected to lower lead-out copper buses. The lower lead-out copper buses are fixedly connected to the insulating columns on the lower lead-out copper busbar connecting seat.

4. The three-position combination electrical appliance for a 40.5kV upper-level isolating circuit breaker used in a gas-insulated switchgear according to claim 1, characterized in that: The shell of the vacuum interrupter is made of nylon insulating material.

5. The three-position combination electrical appliance for a 40.5kV upper-level isolating circuit breaker used in a gas-insulated switchgear according to claim 1, characterized in that: An interlocking component is provided between the three-station module and the circuit breaker module.

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