Novel combined type gas-insulated switchgear structure

Abstract

The utility model discloses a novel combined inflatable cabinet structure, which relates to the technical field of electric appliance automation and comprises a lower isolation gas box, a circuit breaker chamber, an upper isolation gas box and a bus chamber, the bus chamber is positioned at the top of a cabinet body, the circuit breaker chamber is positioned at one side of the bottom of the cabinet body, and the upper isolation gas box is positioned at the other side of the bottom of the cabinet body. One side of the circuit breaker chamber is provided with the lower isolation gas box and the upper isolation gas box, the upper isolation gas box is electrically connected with the bus chamber and the circuit breaker chamber, the lower isolation gas box is electrically connected with the circuit breaker chamber, and one side of the upper isolation gas box is provided with a current transformer. The isolating switch has the advantages that the size of the isolating switch is reduced, and the problems that a switch cabinet is large in size, not in place in switching-on, high in temperature rise, prone to deformation of a contact and unreliable in operation are solved; the circuit breaker trolley solves the problems that a circuit breaker installed in a switch cabinet cannot be overhauled and maintained and the heating of the circuit breaker affects the temperature rise of a gas tank, thereby improving the operation maintainability.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical automation, in particular to a novel combined inflatable cabinet structure. Background Art

[0002] The current global economy is rapidly developing, energy demand is increasing, and production and environmental constraints are tightening. Highly polluting and energy-intensive production and consumption are severely damaging ecosystems, pushing the environment's carrying capacity to its limits. China is vigorously developing new energy resources, with wind, solar, thermal, and energy storage systems complementing each other in power generation, and interprovincial power transmission becoming the norm. For wind, solar, and energy storage equipment, 40.5kV switchgear, as the primary power consumer, is trending towards higher currents. Traditional 35kV air-insulated switchgear and gas-filled switchgear are not well suited to meet the requirements of current renewable energy development. However, traditional 35kV air-insulated switchgear suffers from large size, poor closing conditions, high temperature rise, and unreliable contact deformation. Circuit breakers are difficult to inspect and maintain, generating high heat that affects the temperature rise of the gas tank. Busbar connectors are unreliable, and there is no quick-acting grounding switch. Consequently, a new modular gas-filled switchgear structure is urgently needed to address these issues. Utility Model Content

[0003] In view of the above technical defects, the present invention provides a novel combined inflatable cabinet structure to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a new type of combined inflatable cabinet structure, including a lower isolation gas box, a circuit breaker chamber, an upper isolation gas box, and a busbar chamber, the busbar chamber is located at the top of the cabinet, the circuit breaker chamber is located on one side of the bottom of the cabinet, the lower isolation gas box and the upper isolation gas box are provided on one side of the circuit breaker chamber, the upper isolation gas box is electrically connected to the busbar chamber and the circuit breaker chamber, the lower isolation gas box is electrically connected to the circuit breaker chamber, and a current transformer is provided on one side of the upper isolation gas box.

[0005] Preferably, a lower isolating switch and a quick earthing switch are provided in the lower isolating gas box, and the lower isolating switch and the quick earthing switch are electrically connected. One end of the lower isolating switch is connected to the circuit breaker chamber, and the other end is electrically connected to the current transformer through a sealed wall bushing.

[0006] Preferably, a circuit breaker trolley is provided in the circuit breaker chamber, and the circuit breaker trolley is connected to the lower isolating switch and the upper isolating gas box at the same time.

[0007] Preferably, an upper isolating switch is provided in the upper isolating gas box, and the upper isolating switch is connected to the circuit breaker trolley via a sealed upper contact box.

[0008] Preferably, the circuit breaker trolley and the lower disconnector are connected via a sealed lower contact box.

[0009] Preferably, one end of the current transformer is connected to the outgoing line of the switch cabinet.

[0010] Preferably, an instrument room is provided on one side of the busbar room.

[0011] Preferably, a switch cabinet incoming line is provided on the outside of the cabinet.

[0012] Compared with the prior art, the beneficial effect of the new modular inflatable cabinet structure of the utility model is that the new modular inflatable cabinet structure combines many functional advantages of traditional 35kV air-insulated switchgear and inflatable switchgear. The use of an isolated inflatable gas box structure reduces the size of the isolating switch and shortens the current operation path, solving the problems of unreliable operation such as large size, inadequate closing, high temperature rise, and easy deformation of contacts in traditional switchgear, thereby improving the operational reliability of the product. At the same time, by providing an air-insulated circuit breaker trolley, the circuit breaker is separated from the gas box, making it easier to withdraw, repair, and maintain the circuit breaker. This solves the problem that the circuit breaker installed in the traditional inflatable switchgear cannot be repaired and maintained, and the problem that the heating of the circuit breaker affects the temperature rise of the gas box, thereby improving the operational maintainability of the product.

[0013] The busbar with air-insulated structure design adopts front-to-back staggered arrangement, which reduces the width of the switch cabinet while ensuring a larger insulation distance. It solves the problem of low reliability of busbar connectors in traditional inflatable switch cabinets, reduces the requirements for cabinet connection process, and further improves the operational reliability of the product.

[0014] In addition, the switchgear incorporates a quick-acting earthing switch within the inflatable gas tank, resolving the issue of traditional inflatable switchgear lacking a quick-acting earthing switch. By leveraging the advantages of both traditional and inflatable switchgear, the switchgear not only reduces size but also improves performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0016] Figure 2 It is a front structural schematic diagram of the present utility model.

[0017] In the figure: 1-lower isolation gas box, 2-circuit breaker trolley, 3-sealed lower contact box, 4-sealed upper contact box, 5-circuit breaker chamber, 6-upper isolation gas box, 7-instrument chamber, 8-busbar chamber, 9-cabinet, 10-sealed wall bushing, 11-upper disconnector, 12-current transformer, 13-switch cabinet outgoing line, 14-switch cabinet incoming line, 15-lower disconnector, 16-fast earthing switch. DETAILED DESCRIPTION

[0018] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0019] Please see the attached Figure 1-2 The present invention provides an embodiment of a novel modular inflatable cabinet structure, comprising a lower isolation gas box 1, a circuit breaker chamber 5, an upper isolation gas box 6, and a busbar chamber 8. The busbar chamber 8 is located at the top of a cabinet body 9, and the circuit breaker chamber 5 is located on one side of the bottom of the cabinet body 9. The lower isolation gas box 1 and the upper isolation gas box 6 are provided on one side of the circuit breaker chamber 5. The upper isolation gas box 6 is electrically connected to the busbar chamber 8 and the circuit breaker chamber 5. The lower isolation gas box 1 is electrically connected to the circuit breaker chamber 5. A current transformer 12 is provided on one side of the upper isolation gas box 6. An instrument chamber 7 is provided on one side of the busbar chamber 8. A switchgear incoming line 14 is provided on the outside of the cabinet body 9.

[0020] A lower isolating switch 15 and a quick-acting earthing switch 16 are installed in the lower isolating gas box 1. The lower isolating switch 15 and the quick-acting earthing switch 16 are electrically connected. One end of the lower isolating switch 15 is connected to the circuit breaker chamber 5, and the other end is electrically connected to the current transformer 12 through a sealed wall bushing 10. One end of the current transformer 12 is connected to the switch cabinet outgoing line 13.

[0021] The fast grounding switch 16 is used to provide a fast grounding function to ensure the safety of the system. The lower isolating switch 15 is electrically connected to the current transformer 12 through the sealed wall bushing 10 for current measurement and monitoring.

[0022] A circuit breaker trolley 2 is provided in the circuit breaker chamber 5 , and the circuit breaker trolley 2 is connected to the lower isolating switch 15 and the upper isolating gas box 6 at the same time.

[0023] An upper isolating switch 11 is provided in the upper isolating gas box 6 , and the upper isolating switch 11 is connected to the circuit breaker trolley 2 via a sealed upper contact box 4 .

[0024] The circuit breaker carriage 2 is used to install and operate the circuit breaker to realize the on / off control of the circuit. The sealed upper contact box 4 ensures a reliable electrical connection and provides insulation protection, ensuring the reliable operation of the circuit.

[0025] The circuit breaker trolley 2 is connected to the lower disconnector 15 via a sealed lower contact box 3 .

[0026] The upper disconnector 11 of the switchgear is installed in the upper isolation gas box 6. The upper and lower ends of the current are drawn out through sealed wall bushings 10 and a sealed upper contact box 4. The upper isolation gas box 6 adopts an inflatable sealed structure design. Similarly, the lower disconnector 15 of the switchgear is installed in the lower isolation gas box 1. The front and rear ends of the current are drawn out through sealed wall bushings 10 and a sealed lower contact box 3. A fast grounding switch 16 is installed in the gas box. The lower isolation gas box 1 adopts an inflatable sealed structure design. The sealed lower contact box 3 ensures a reliable electrical connection and provides insulation protection.

[0027] The specific working principle of this embodiment is as follows:

[0028] The line current enters the switch cabinet at the left side of the switchgear at the incoming line 14, enters the upper disconnector 11 through the sealed wall bushing 10, passes through the sealed upper contact box 4, passes through the upper end of the circuit breaker trolley 2, reaches the sealed lower contact box 3 from the lower end of the circuit breaker trolley 2, and finally enters the current transformer 12 from the lower disconnector 15 through the sealed wall bushing 10, and flows out from the switch cabinet outgoing line 13.

[0029] This new modular gas-filled cabinet structure combines many of the functional advantages of traditional 35kV air-insulated switchgear and gas-filled switchgear. The use of an isolated gas-filled gas box reduces the size of the disconnector and shortens the current path. This solves the operational issues of traditional switchgear, such as bulk, inadequate closing, high temperature rise, and contact deformation, thereby improving product reliability. Furthermore, the inclusion of an air-insulated circuit breaker trolley separates the circuit breaker from the gas box, making it easier to remove and inspect and maintain the circuit breaker. This addresses the issues of traditional gas-filled switchgear that prevent maintenance and repair when the circuit breaker is installed, as well as the issue of the heat generated by the circuit breaker affecting the temperature rise of the gas box, thereby improving the product's operational maintainability.

[0030] The busbar with air-insulated structure design adopts front-to-back staggered arrangement, which reduces the width of the switch cabinet while ensuring a larger insulation distance. It solves the problem of low reliability of busbar connectors in traditional inflatable switch cabinets, reduces the requirements for cabinet connection process, and further improves the operational reliability of the product.

[0031] In addition, the switchgear incorporates a quick-acting earthing switch within the inflatable gas tank, resolving the issue of traditional inflatable switchgear lacking a quick-acting earthing switch. By leveraging the advantages of both traditional and inflatable switchgear, the switchgear not only reduces size but also improves performance.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A new type of combined inflatable cabinet structure, characterized in that: The invention comprises a lower isolation gas box (1), a circuit breaker chamber (5), an upper isolation gas box (6), and a busbar chamber (8), wherein the busbar chamber (8) is located at the top of a cabinet (9), the circuit breaker chamber (5) is located at one side of the bottom of the cabinet (9), the lower isolation gas box (1) and the upper isolation gas box (6) are arranged on one side of the circuit breaker chamber (5), the upper isolation gas box (6) is electrically connected to the busbar chamber (8) and the circuit breaker chamber (5), the lower isolation gas box (1) is electrically connected to the circuit breaker chamber (5), and a current transformer (12) is arranged on one side of the upper isolation gas box (6).

2. According to the novel combined inflatable cabinet structure of claim 1, it is characterized in that: A lower isolating switch (15) and a quick earthing switch (16) are arranged in the lower isolating gas box (1), and the lower isolating switch (15) and the quick earthing switch (16) are electrically connected. One end of the lower isolating switch (15) is connected to the circuit breaker chamber (5), and the other end is electrically connected to the current transformer (12) via a sealed wall bushing (10).

3. According to the novel combined inflatable cabinet structure of claim 2, it is characterized in that: A circuit breaker trolley (2) is arranged in the circuit breaker chamber (5), and the circuit breaker trolley (2) is simultaneously connected to the lower isolating switch (15) and the upper isolating gas box (6).

4. According to the novel combined inflatable cabinet structure of claim 3, it is characterized in that: An upper isolating switch (11) is arranged in the upper isolating gas box (6), and the upper isolating switch (11) is connected to the circuit breaker trolley (2) via a sealed upper contact box (4).

5. According to the novel combined inflatable cabinet structure of claim 3, it is characterized in that: The circuit breaker trolley (2) and the lower isolating switch (15) are connected via a sealed lower contact box (3).

6. According to the novel combined inflatable cabinet structure of claim 2, it is characterized in that: One end of the current transformer (12) is connected to the switch cabinet outgoing line (13).

7. According to the novel combined inflatable cabinet structure of claim 1, it is characterized in that: An instrument room (7) is provided on one side of the busbar room (8).

8. According to the novel combined inflatable cabinet structure of claim 1, it is characterized in that: A switch cabinet inlet line (14) is arranged outside the cabinet body (9).

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