Gas insulation section circuit breaker cabinet

Abstract

The invention discloses a gas insulation section circuit breaker cabinet which comprises a metal plate shell. The top of one side of an inner cavity of the sheet metal shell is provided with a display assembly, the center of the top of the sheet metal shell is provided with an explosion-proof window, the bottom of the inner cavity of the sheet metal shell is provided with a flat cable assembly, and the middle of one side of the inner cavity of the sheet metal shell is provided with a partition assembly; according to the invention, the small bus chamber, the instrument chamber, the mechanism chamber, the gas tank chamber and the cable chamber are arranged in a matched manner, and various functional mechanism chambers in the small bus chamber, the instrument chamber, the mechanism chamber, the gas tank chamber and the cable chamber are arranged and separated sequentially, so that functional modules are orderly and are simply and clearly arranged, and production and use by customers are facilitated; and through the special copper bar design and installation mode of the first copper bar and the second copper bar, the transverse size of the sectional circuit breaker cabinet is reduced, so that the overall size of the sectional circuit breaker cabinet is reduced, the operation difficulty is reduced, and production and use of customers are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of medium and low voltage distribution network switchgear, and in particular to a gas insulated sectionalized circuit breaker cabinet. Background Art

[0002] Gas-insulated section circuit breaker cabinet is a circuit breaker cabinet that uses gas as the insulating medium, usually sulfur hexafluoride (SF6) gas. This type of circuit breaker cabinet has high dielectric strength, high thermal stability and excellent arc extinguishing performance. It can operate safely at high voltage and reduce the risk of discharge and short-circuit faults.

[0003] Gas-insulated section circuit breaker cabinets are widely used in medium-voltage and high-voltage application scenarios where space is limited and reliability is critical. Especially in the construction of ultra-high voltage power grids, gas-insulated switchgear has become a key equipment. They highly integrate the primary equipment of substations and are easy to maintain. In addition, gas-insulated section circuit breaker cabinets also have significant advantages in dirty areas and high-altitude areas because their gas-filled compartments are not affected by dirt and altitude.

[0004] In recent years, with the rapid development of social and economic construction, the complexity of various engineering constructions has gradually increased, and higher requirements have been placed on electric power energy. The structure of the original switchgear is generally more complicated, and various functional mechanisms and compartments are crisscrossed and mixed together, which brings great operational difficulties to production and assembly workers and equipment maintenance personnel, is not convenient for production and customer use, and has a large external structure size, and a relatively low space utilization rate. Due to the large external structure size, its application range is limited, and it is difficult to achieve large current carrying tasks. Summary of the invention

[0005] The object of the present invention is to provide a gas insulated sectionalized circuit breaker cabinet, which has the advantages of arranging and separating various functional mechanism compartments in the cabinet in sequence, making each functional module neat and orderly, and the arrangement concise and clear, which is more convenient for production and customer use, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a gas-insulated section circuit breaker cabinet, comprising a sheet metal housing;

[0007] A display assembly is arranged at the top of one side of the inner cavity of the sheet metal shell, an explosion-proof window is arranged at the center of the top of the sheet metal shell, a wiring assembly is arranged at the bottom of the inner cavity of the sheet metal shell, a partition assembly is arranged in the middle of one side of the inner cavity of the sheet metal shell, a cable installation assembly is arranged at the bottom of the inner cavity of the sheet metal shell, a support assembly is arranged inside the sheet metal shell, and a connection assembly is arranged below the explosion-proof window;

[0008] The partition assembly includes an isolation control assembly and a circuit breaker control assembly. The isolation control assembly is arranged on one side of the inner cavity of the sheet metal shell, and the circuit breaker control assembly is arranged on one side of the inner cavity of the sheet metal shell.

[0009] Exemplarily, the display assembly includes a small busbar chamber and an instrument chamber, wherein the small busbar chamber is fixedly mounted on the top of one side of the inner cavity of the sheet metal shell, and the instrument chamber is fixedly mounted on the bottom of the small busbar chamber.

[0010] Exemplarily, the cable assembly includes a first copper bar and a second copper bar, the inner cavity of the sheet metal shell is arranged on the first copper bar, and the second copper bar is installed on the top of the first copper bar.

[0011] Exemplarily, the isolation control assembly includes an isolation mechanism, an isolation switch and a mechanism chamber, wherein the isolation mechanism is fixedly mounted at the bottom of the instrument chamber, the isolation switch is fixedly mounted in the middle of the inner cavity of the sheet metal shell, and the mechanism chamber is fixedly mounted at the bottom of the isolation mechanism.

[0012] Exemplarily, the circuit breaker control assembly includes a vacuum circuit breaker and a circuit breaker mechanism, wherein the vacuum circuit breaker is fixedly mounted at the bottom of the disconnector, and the circuit breaker mechanism is fixedly mounted at the bottom of the mechanism chamber.

[0013] Exemplarily, the cable installation assembly includes a cable bin and a solid cable, wherein the cable bin is fixedly installed at the bottom of the inner cavity of the sheet metal shell, and the solid cable is fixedly installed at the bottom of the inner cavity of the sheet metal shell, and the solid cable is located on one side of the cable bin.

[0014] Exemplarily, the support assembly includes an air box chamber and a side parallel bushing, the air box chamber is arranged at the bottom of the side parallel bushing, and the side parallel bushing is arranged on one side of the disconnector.

[0015] Exemplarily, the connection assembly includes a busbar body and an insulator, wherein the insulator is fixedly installed through the top of the inner cavity of the small busbar chamber, the insulator is located at the bottom of the explosion-proof window, and the busbar body is fixedly installed on the outside of the insulator.

[0016] Exemplarily, one end of the busbar body is connected to the interior of the air box chamber, and the busbar body and insulators are provided in several groups.

[0017] Exemplarily, the top, middle and bottom of one side of the sheet metal shell are rotatably connected to a protective cabinet door, and a partition plate is fixedly installed inside the air box chamber.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention arranges the small busbar room, the instrument room, the mechanism room, the gas box room and the cable compartment in coordination, and utilizes the various functional mechanism rooms including the above-mentioned ones to be arranged and separated in sequence, so that each functional module is neat and orderly, and the arrangement is concise and clear, which is more convenient for production and customer use. In addition, through the unique copper bar design and installation method of the first copper bar and the second copper bar, the lateral size of the sectional circuit breaker cabinet is reduced, thereby reducing the overall size of the sectional circuit breaker cabinet, which not only reduces the difficulty of operation, but also facilitates the production and use of customers.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the horizontal copper bar of the present invention;

[0023] Figure 3 This is a schematic diagram of the sheet metal housing structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the partially enlarged structure of location A of the present invention.

[0025] In the figure: 1. Small busbar room; 2. Instrument room; 3. Isolation mechanism; 4. Disconnector; 5. Mechanism room; 6. Vacuum circuit breaker; 7. Circuit breaker mechanism; 8. Cable compartment; 9. Solid cable; 10. First copper busbar; 11. Gas box room; 12. Side parallel bushing; 13. Busbar body; 14. Insulator; 15. Explosion-proof window; 16. Second copper busbar; 17. Sheet metal shell. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Gas-insulated section circuit breaker cabinet is a circuit breaker cabinet that uses gas as an insulating medium, usually sulfur hexafluoride (SF6) gas. This type of circuit breaker cabinet has high dielectric strength, high thermal stability and excellent arc extinguishing performance. It can operate safely at high voltage and reduce the risk of discharge and short circuit failures. The gas-insulated section circuit breaker cabinet uses SF6 gas as an insulating medium. Its working principle is to protect the power system through the high dielectric strength and excellent arc extinguishing performance of SF6 gas. SF6 gas has a higher dielectric strength than air and can withstand higher voltages without being broken down. At the same time, it has a low molecular weight and high thermal conductivity, which can dissipate heat and extinguish arcs more effectively.

[0028] like Figure 1-4 As shown, the present invention provides a gas insulated sectionalized circuit breaker cabinet, including a sheet metal shell 17, a display component is arranged on the top of one side of the inner cavity of the sheet metal shell 17, an explosion-proof window 15 is arranged at the center of the top of the sheet metal shell 17, a wiring assembly is arranged at the bottom of the inner cavity of the sheet metal shell 17, a partition assembly is arranged in the middle of one side of the inner cavity of the sheet metal shell 17, a cable installation assembly is arranged at the bottom of the inner cavity of the sheet metal shell 17, a support assembly is arranged inside the sheet metal shell 17, and a connection assembly is arranged below the explosion-proof window 15.

[0029] The explosion-proof window 15 can effectively protect the safety of equipment maintenance personnel in the event of a fault.

[0030] The partition assembly includes an isolation control assembly and a circuit breaker control assembly. The isolation control assembly is arranged on one side of the inner cavity of the sheet metal shell 17 , and the circuit breaker control assembly is arranged on one side of the inner cavity of the sheet metal shell 17 .

[0031] Through the cooperation of the isolation control component and the circuit breaker control component, the lateral size of the section circuit breaker cabinet is reduced, thereby reducing the overall size of the section circuit breaker cabinet, which mainly plays the role of isolation and circuit breaker.

[0032] Several groups of partition plates are installed inside the sheet metal shell 17, which mainly divide the space inside the sheet metal shell 17 and form a plurality of different spaces to facilitate the installation and operation of different equipment.

[0033] First, the partition plate divides the sheet metal shell 17, i.e., the interior of the cabinet, into the cabinet located outside and the air box chamber 11 located in the middle, and the cabinet is divided into three spaces due to the partition of the air box chamber 11, as follows, divided into the left part, the right part, and the lower part;

[0034] The upper part of the right common box room is the instrument room 2, which is equipped with relay protection components, instruments, live monitoring indicators and secondary equipment with special requirements;

[0035] The lower part of the right common box chamber is the mechanism chamber 5, in which the isolation mechanism 3, the circuit breaker mechanism 7 and its corresponding operating mechanism are installed, and the operating mechanism adopts the operating fee method in the prior art, so there is no need to elaborate too much;

[0036] The lower cable compartment 8 is the busbar installation area, in which multi-phase solid cables 9 are installed. Side parallel bushings 12 are installed on the left and right sides of the air box chamber 11 respectively. The air box chamber 11 includes a busbar lifting area and a switch installation area distributed on the left and right. The partition of the switch installation area is installed with disconnectors 4 and vacuum circuit breakers 6 distributed up and down, and the operating mechanism is connected to the disconnectors 4 and vacuum circuit breakers 6 for operation.

[0037] An explosion-proof window 15 is installed above the gas box chamber 11. During the installation process, the explosion-proof window 15 is installed by rotating connection, which can realize switching operation and effectively protect the safety of equipment maintenance personnel in the event of a fault. An insulator 14 for incoming lines is installed through the partition in the busbar installation area, and one end of the solid cable 9 is connected to the interior of the gas box chamber 11 through the insulator 14 for incoming lines.

[0038] like Figure 1 As shown, the display component includes a small busbar chamber 1 and an instrument chamber 2. The small busbar chamber 1 is fixedly installed on the top of one side of the inner cavity of the sheet metal shell 17, and the instrument chamber 2 is fixedly installed on the bottom of the small busbar chamber 1 to provide power supply for the power system, ensure the normal operation of other equipment and facilities, and can also divert current to different equipment and facilities to meet different power needs.

[0039] The interior of the instrument room 2 includes and is installed with relay protection elements, instruments, live monitoring indicators and secondary equipment with special requirements.

[0040] like Figure 1 and 3 As shown, the cable assembly includes a first copper bar 10 and a second copper bar 16. The inner cavity of the sheet metal shell 17 is arranged on the first copper bar 10, and the second copper bar 16 is installed on the top of the first copper bar 10, mainly to achieve stacking installation and enhance the current carrying capacity of the copper bar, so that the sectioned circuit breaker cabinet has the ability to carry large current.

[0041] like Figure 1 As shown, the isolation control assembly includes an isolation mechanism 3, an isolation switch 4 and a mechanism chamber 5. The isolation mechanism 3 is fixedly installed at the bottom of the instrument chamber 2, the isolation switch 4 is fixedly installed in the middle of the inner cavity of the sheet metal shell 17, and the mechanism chamber 5 is fixedly installed at the bottom of the isolation mechanism 3. The mechanism chamber 5 is mainly used to install corresponding structural components inside it, and the isolation mechanism 3 and the isolation switch 4 mainly play the role of switching operation during isolation and isolation protection.

[0042] like Figure 1As shown, the circuit breaker control assembly includes a vacuum circuit breaker 6 and a circuit breaker mechanism 7. The vacuum circuit breaker 6 is fixedly mounted at the bottom of the disconnector 4. The circuit breaker mechanism 7 is fixedly mounted at the bottom of the disconnector 4. Figure 1 As shown, the vacuum circuit breaker 6 is installed at the bottom of the mechanism chamber 5 and is mainly used to control and protect high-voltage electrical equipment.

[0043] like Figure 1 As shown, the cable installation assembly includes a cable bin 8 and a solid cable 9. The cable bin 8 is fixedly installed at the bottom of the inner cavity of the sheet metal shell 17, and the solid cable 9 is fixedly installed at the bottom of the inner cavity of the sheet metal shell 17. The solid cable 9 is located on one side of the cable bin 8 and is used to protect and store excess cables inside.

[0044] like Figure 1 As shown, the support assembly includes an air box chamber 11 and a side parallel bushing 12. The air box chamber 11 is arranged at the bottom of the side parallel bushing 12, and the side parallel bushing 12 is arranged on one side of the disconnector 4. The air box chamber 11 has good insulation performance and arc extinguishing ability, can effectively isolate high voltage in a high voltage environment, prevent current leakage and arc generation, and ensure the safe operation of the vacuum circuit breaker 6 under normal working conditions.

[0045] like Figure 1 As shown, the connection assembly includes a busbar body 13 and an insulator 14. The insulator 14 is fixedly installed through the top of the inner cavity of the small busbar chamber 1. The insulator 14 is located at the bottom of the explosion-proof window 15. The busbar body 13 is fixedly installed on the outside of the insulator 14. The insulator 14 is used to support the busbar body 13 to facilitate its connection operation.

[0046] also;

[0047] like Figure 1 As shown, one end of the busbar body 13 is connected to the interior of the air box chamber 11, and the busbar body 13 and the insulator 14 are both provided in several groups.

[0048] like Figure 1 As shown, the top, middle and bottom of one side of the sheet metal shell 17 are rotatably connected with protective cabinet doors, and a partition plate is fixedly installed inside the air box chamber 11.

[0049] Through Figure 1 The cabinet structure shown in the figure arranges and separates various functional mechanism compartments including the small busbar room 1, the instrument room 2, the mechanism room 5, the gas box room 11 and the cable compartment 8 in sequence. Each functional module is neatly arranged and clear, which is more convenient for production and customer use.

[0050] External current enters through Figure 1 and Figure 2The copper bar installation method shown in the figure flows downwardly into the longitudinal Z-shaped first copper bar 10 through the transverse second copper bar 16 until the static contact seat, and passes through the isolating switch 4. The isolating switch 4 pushes the cylindrical moving knife to move rightward through the operating mechanism until the static contact seat is connected. Then the current enters the vacuum circuit breaker 6 downward, and is evenly arranged from left to right and from front to back to the insulator 14 to the bottom plate of the gas box chamber 11 through the L-shaped first copper bar 10, which not only ensures the insulation distance and creepage distance of the electrical parts, but also reduces the transverse size of the sectional circuit breaker cabinet, thereby reducing the overall size of the sectional circuit breaker cabinet, and finally flows to the busbar body 13 and flows out to the remaining switch cabinets or ring network cabinet equipment;

[0051] Under the condition of ensuring the contact area, the current carrying capacity of the copper bar is enhanced by stacking the first copper bar 10 and the second copper bar 16, so that the sectionalized circuit breaker cabinet has the ability to carry large current;

[0052] At the same time, in order to ensure that the copper busbar will not overheat due to carrying large current, a heat sink is installed next to the overlapping surface of the copper busbar to dissipate heat;

[0053] Based on the above;

[0054] The cabinet structure of the gas-insulated sectionalized circuit breaker cabinet separates various functional mechanism compartments including the small busbar compartment 1, the instrument compartment 2, the mechanism compartment 5, the gas box compartment 11 and the cable compartment 8 in a sequential arrangement. Each functional module is neatly arranged and the layout is concise and clear, which is more convenient for production and customer use.

[0055] The gas-insulated sectionalized circuit breaker cabinet has the advantage of reducing the lateral size of the sectionalized circuit breaker cabinet through the unique design and installation of the first copper bar 10 and the second copper bar 16, thereby reducing the overall size of the sectionalized circuit breaker cabinet.

[0056] The explosion-proof window 15 opened and rotatably installed above the gas box chamber 11 can effectively protect the safety of equipment maintenance and repair personnel in the event of a fault, facilitate the switch closing operation, and facilitate people's operation and use.

[0057] Under the condition of ensuring the contact area, the current carrying capacity of the first copper bar 10 and the second copper bar 16 is enhanced by stacking the first copper bar 10 and the second copper bar 16, so that the section circuit breaker cabinet has the ability to carry large current;

[0058] At the same time, in order to ensure that the first copper bar 10 and the second copper bar 16 will not overheat due to carrying a large current, a heat sink is installed next to the overlapping surface of the first copper bar 10 and the second copper bar 16 to dissipate heat.

[0059] In summary, the structure of the switch device of the present application is neat and orderly, the layout is concise and clear, and the various functional mechanism compartments are arranged and separated in sequence, which is convenient for the operation and use of production assembly workers and equipment maintenance personnel, and is also convenient for production and customer use. The external structure has a small size, which improves the utilization rate of space. Due to the small size of the external structure, its application range is not limited, and it can adapt to a variety of different scenarios, and can simply and easily achieve large current carrying tasks to meet people's needs and people's use.

[0060] 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. A gas insulated section circuit breaker cabinet, characterized in that: comprising a sheet metal housing (17); A display assembly is arranged at the top of one side of the inner cavity of the sheet metal shell (17), an explosion-proof window (15) is arranged at the center of the top of the sheet metal shell (17), a wiring assembly is arranged at the bottom of the inner cavity of the sheet metal shell (17), a partition assembly is arranged in the middle of one side of the inner cavity of the sheet metal shell (17), a cable installation assembly is arranged at the bottom of the inner cavity of the sheet metal shell (17), a support assembly is arranged inside the sheet metal shell (17), and a connection assembly is arranged below the explosion-proof window (15); The partition assembly comprises an isolation control assembly and a circuit breaker control assembly. The isolation control assembly is arranged on one side of the inner cavity of the sheet metal shell (17), and the circuit breaker control assembly is arranged on one side of the inner cavity of the sheet metal shell (17).

2. A gas insulated section circuit breaker cabinet according to claim 1, characterized in that: The display assembly comprises a small busbar chamber (1) and an instrument chamber (2), wherein the small busbar chamber (1) is fixedly mounted on the top of one side of the inner cavity of the sheet metal shell (17), and the instrument chamber (2) is fixedly mounted on the bottom of the small busbar chamber (1).

3. A gas insulated section circuit breaker cabinet according to claim 1, characterized in that: The cable assembly comprises a first copper bar (10) and a second copper bar (16); the inner cavity of the sheet metal housing (17) is arranged on the first copper bar (10); and the second copper bar (16) is installed on the top of the first copper bar (10).

4. A gas insulated section circuit breaker cabinet according to claim 1, characterized in that: The isolation control assembly comprises an isolation mechanism (3), an isolation switch (4) and a mechanism chamber (5); the isolation mechanism (3) is fixedly mounted on the bottom of the instrument chamber (2); the isolation switch (4) is fixedly mounted in the middle of the inner cavity of the sheet metal shell (17); and the mechanism chamber (5) is fixedly mounted on the bottom of the isolation mechanism (3).

5. A gas insulated section circuit breaker cabinet according to claim 4, characterized in that: The circuit breaker control assembly comprises a vacuum circuit breaker (6) and a circuit breaker mechanism (7); the vacuum circuit breaker (6) is fixedly mounted on the bottom of the disconnector (4); and the circuit breaker mechanism (7) is fixedly mounted on the bottom of the mechanism chamber (5).

6. A gas insulated section circuit breaker cabinet according to claim 1, characterized in that: The cable installation assembly comprises a cable bin (8) and a solid cable (9); the cable bin (8) is fixedly mounted at the bottom of an inner cavity of a sheet metal shell (17); the solid cable (9) is fixedly mounted at the bottom of an inner cavity of the sheet metal shell (17); and the solid cable (9) is located on one side of the cable bin (8).

7. A gas insulated section circuit breaker cabinet according to claim 1, characterized in that: The support assembly comprises an air box chamber (11) and a side-parallel bushing (12); the air box chamber (11) is arranged at the bottom of the side-parallel bushing (12); and the side-parallel bushing (12) is arranged at one side of the disconnector (4).

8. A gas insulated section circuit breaker cabinet according to claim 1, characterized in that: The connection assembly comprises a busbar body (13) and an insulator (14); the insulator (14) is fixedly installed through the top of the inner cavity of the small busbar chamber (1); the insulator (14) is located at the bottom of the explosion-proof window (15); and the busbar body (13) is fixedly installed on the outside of the insulator (14).

9. A gas insulated section circuit breaker cabinet according to claim 8, characterized in that: One end of the busbar body (13) is connected to the interior of the air box chamber (11), and the busbar body (13) and the insulator (14) are both provided in a plurality of groups.

10. A gas insulated section circuit breaker cabinet according to claim 7, characterized in that: The top, middle and bottom of one side of the sheet metal shell (17) are rotatably connected to protective cabinet doors, and a partition plate is fixedly installed inside the air box chamber (11).

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