PT cabinet with integrated node switch

Abstract

A PT cabinet with an integrated node switch comprises a gas box and a cable chamber, the gas box is arranged above the cable chamber, a PT control unit and a bypass node switch unit are installed in the gas box, a voltage transformer is installed in the cable chamber, the PT control unit is connected with the voltage transformer through a first sleeve, and the bypass node switch unit is connected with the PT control unit through a second sleeve. The bypass node switch unit is connected with the voltage transformer through a first sleeve, the bypass node switch unit is connected with the voltage transformer through a second sleeve, the first sleeve or the second sleeve is located at the position close to a front box plate of the gas box, and the first sleeve and the second sleeve are located on the same horizontal line. The problems that plugging and unplugging of an electricity taking cable are very inconvenient, and the working state of the PT cabinet is not easy to observe are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of ring main units, in particular to a PT cabinet with an integrated node switch. Background Technique

[0002] With the increasingly wide application of environmentally friendly gas-insulated ring main units, in order to facilitate power taking during on-site construction, more and more PT cabinets of ring main units need to integrate node switches to facilitate quick power taking on site.

[0003] At present, the power-taking plug of the PT cabinet with an integrated node switch is installed at the lower rear of the cabinet body. When in use on site, it is very inconvenient to plug and unplug the power-taking cable. The operating mechanism and the connecting cable are respectively in the front and rear directions of the ring main unit box, which is not convenient to observe the working condition of the ring main unit. The node switch cabinet door and the operating mechanism are on two opposite surfaces, making it difficult to achieve mechanical interlocking between the node switch cabinet door and the operating mechanism, and there are certain loopholes in safety; the busbar between the core unit inside the gas box and the power-taking bushing needs special design and manufacturing, which increases the design difficulty and the cost of manufacturing the busbar. Therefore, it is urgent to improve the structure of the PT cabinet with an integrated node switch. Content of the Utility Model

[0004] The purpose of the utility model is to provide a PT cabinet with an integrated node switch to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A PT cabinet with an integrated node switch includes a gas box and a cable chamber. The gas box is arranged above the cable chamber. A PT control unit and a bypass node switch unit are installed in the gas box. A voltage transformer is installed in the cable chamber. The PT control unit and the voltage transformer are connected by a first bushing. The bypass node switch unit and the voltage transformer are connected by a second bushing. The first bushing or the second bushing is located near the front box board of the gas box. The first bushing and the second bushing are on the same horizontal line.

[0007] In a possible implementation manner, a flexible cable is provided between the first bushing and the voltage transformer. One end of the flexible cable is connected to the first bushing, and the other end is connected to the voltage transformer.

[0008] In a possible implementation manner, the second bushing is externally connected to a T-shaped front plug, and a power-taking socket and a plug are sequentially connected to the T-shaped front plug.

[0009] In a possible implementation manner, a cable clamp is provided in the cable chamber. The cable clamp is arranged directly below the plug, and a wire passing hole is provided below the cable clamp.

[0010] In a possible implementation, the PT control unit and the first bushing are connected by a first busbar.

[0011] In a possible implementation, the bypass node switch unit and the second bushing are connected by a second busbar.

[0012] In a possible implementation, the first busbar and the second busbar are routed in the same way.

[0013] In a possible implementation, a first mechanism chamber is provided above the cable chamber, and the first mechanism chamber and the cable chamber are connected by a PT door interlock.

[0014] In a possible implementation, a second mechanism chamber is provided above the cable chamber, and the second mechanism chamber and the cable chamber are connected by a bypass door interlock.

[0015] Compared with the prior art, the present utility model has the following advantages:

[0016] 1. By arranging the bushings of the PT control unit and the bypass node switch unit at the front end of the gas tank and on the same horizontal line, the problem that it is very inconvenient to plug and unplug the power-taking cable and it is not easy to observe the working state of the PT cabinet is effectively solved;

[0017] 2. The PT control unit and the bypass node switch unit can adopt the same busbar routing method, reducing the cost and difficulty of busbar design;

[0018] 3. Separately controlling different mechanism chambers with different door interlocks effectively enhances the safety of the PT cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is another schematic diagram of the overall structure of the present utility model;

[0021] Figure 3 is a schematic diagram of the relevant structure of the PT control unit of the present utility model;

[0022] Figure 4 is a schematic diagram of the relevant structure of the bypass node switch unit of the present utility model.

[0023] In the figure: 10, air box; 20, cable chamber; 30, first mechanism chamber, 40, second mechanism chamber, 11, PT control unit, 12, bypass node switch unit, 13, first bushing, 14, second bushing, 15, first busbar, 16, second busbar, 17, PT door interlock, 18, bypass door interlock, 19, flexible cable, 21, voltage transformer, 22, cable clamp, 121, T-shaped front plug, 122, power-taking socket, 123, plug. Detailed implementation manner

[0024] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manner, structure, features and their effects of the present utility model as follows.

[0025] As Figures 1-4 shown, among which, Figure 2 is a schematic diagram of the overall structure of the PT cabinet of the present application after the cable chamber door and the front box plate of the air box 10 are closed. In order to better illustrate the internal structure of the PT cabinet, in Figure 1 , the front box plate and the cable chamber door are removed. A PT cabinet with an integrated node switch includes an air box 10 and a cable chamber 20. The air box 10 is arranged above the cable chamber 20. A PT control unit 11 and a bypass node switch unit 12 are installed in the air box 10. A voltage transformer 21 is installed in the cable chamber 20. The PT control unit 11 is connected to the voltage transformer 21 through a first bushing 13. The bypass node switch unit 12 is connected to the voltage transformer 21 through a second bushing 14. The first bushing 13 or the second bushing 14 is located near the front box plate of the air box 10. The first bushing 13 and the second bushing 14 are on the same horizontal line. The PT control unit 11 may include a disconnecting switch, a circuit breaker and other devices for controlling the operation of the PT (voltage transformer). The bypass node switch unit 12 is similar to the PT control unit 11 and may include a disconnecting switch, a circuit breaker and other devices. The first bushing 13 and the second bushing 14 may adopt the same size, which can reduce the design and manufacturing difficulty and save costs. The first bushing 13 and the second bushing are on the same horizontal line, which enables the PT control unit 11 and the bypass node switch unit 12 to be arranged side by side, so that only the front door of the PT cabinet needs to be opened for corresponding operations. Among them, the second bushing 14 is a power-taking bushing. By placing the power-taking bushing in the front, both the power-taking connection and the mechanism operation are on the front, which reduces the construction difficulty for terrains with obstacles at the back or other inconvenient rear door openings, and is convenient for on-site construction, operation and observation.

[0026] Specifically, the PT cabinet of the present application can be divided into three parts, namely a cable chamber 20, a PT control unit 11, and a bypass node switch unit 12. Among them, the cable chamber 20 is located below, the PT control unit 11 is located in the upper left, and the bypass node switch unit 12 is located in the upper right. The PT control unit 11 and the bypass node switch unit 12 are arranged side by side above the cable chamber 20.

[0027] As Figure 3 shown, a flexible cable 19 is provided between the first bushing 13 and the voltage transformer 21. One end of the flexible cable 19 is connected to the first bushing 13, and the other end is connected to the voltage transformer 21. The PT control unit 11 and the first bushing 13 are connected by a first bus 15. Above the cable chamber 20, there is a first mechanism chamber 30, and the first mechanism chamber 30 and the cable chamber 20 are connected by a PT door interlock 17. For the cable chamber 20 of the present application, it includes two cable chamber doors, and one of the cable chamber 20 doors is connected to the aforementioned PT door interlock 17. When it is necessary to open this cable chamber 20, only the opening state of the PT door interlock 17 needs to be adjusted, and then this cable chamber door can be opened for equipment maintenance and debugging. Equipment for controlling the opening and closing of the disconnecting switch in the PT control unit 11 can be installed in the first mechanism chamber 30.

[0028] As Figure 4 shown, the second bushing 14 is externally connected to a T-shaped front plug 121, and a power-taking socket 122 and a plug 123 are sequentially connected to the T-shaped front plug 121. Inside the cable chamber, there is a cable clamp 22, and the cable clamp 22 is arranged directly below the plug 123. A wire passing hole is provided below the cable clamp 22. The bypass node switch unit 12 and the second bushing 14 are connected by a second bus 16. Above the cable chamber 20, there is a second mechanism chamber 40, and the second mechanism chamber 40 and the cable chamber 20 are connected by a bypass door interlock 18. Among them, the structures of the first bushing 13 and the second bushing 14 can be the same, and the wiring methods of the first bus 15 and the second bus 16 are the same. Equipment for controlling the states of devices such as the circuit breaker in the bypass node switch unit 12 can be installed in the second mechanism chamber 40.

[0029] During use, the T-shaped front plug 121, the power-taking socket 122, and the plug 123 can be directly pulled out as a whole, the cable can be fed in through the wire passing hole below the cable clamp 22, and then the cable can be connected to the second bushing 14 according to the cable connection method of a common ring main unit. Among them, the bypass node switch unit 12 is used as an incoming / outgoing line cabinet.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", "left and right", "front and back", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0031] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] The above are only the preferred embodiments of the present utility model, and do not impose any formal limitations on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A PT cabinet with an integrated node switch, characterized in that: The invention comprises an air box (10) and a cable chamber (20), wherein the air box (10) is arranged above the cable chamber (20), a PT control unit (11) and a bypass node switch unit (12) are installed in the air box (10), and a voltage transformer (21) is installed in the cable chamber (20), wherein the PT control unit (11) and the voltage transformer (21) are connected via a first bushing (13), and the bypass node switch unit (12) and the voltage transformer (21) are connected via a second bushing (14), wherein the first bushing (13) or the second bushing (14) is located near a front box plate of the air box (10), and the first bushing (13) and the second bushing (14) are on the same horizontal line.

2. The PT cabinet with integrated node switch according to claim 1, characterized in that: A flexible cable (19) is provided between the first bushing (13) and the voltage transformer (21); one end of the flexible cable (19) is connected to the first bushing (13), and the other end is connected to the voltage transformer (21).

3. The PT cabinet with integrated node switch according to claim 1, characterized in that: The second sleeve (14) is externally connected to a T-shaped front plug (121), and the T-shaped front plug (121) is sequentially connected to a power socket (122) and a plug (123).

4. The PT cabinet with integrated node switch according to claim 3, characterized in that: A cable clamp (22) is provided in the cable chamber (20); the cable clamp (22) is provided directly below the plug (123); and a wire hole is provided below the cable clamp (22).

5. The PT cabinet with integrated node switch according to claim 1, characterized in that: The PT control unit (11) and the first bushing (13) are connected via a first busbar (15).

6. The PT cabinet with integrated node switch according to claim 5, characterized in that: The bypass node switch unit (12) and the second bushing (14) are connected via a second busbar (16).

7. The PT cabinet with integrated node switch according to claim 6, characterized in that: The first busbar (15) and the second busbar (16) are wired in the same manner.

8. The PT cabinet with integrated node switch according to claim 1, characterized in that: A first mechanism chamber (30) is provided above the cable chamber (20), and the first mechanism chamber (30) is connected to the cable chamber (20) via a PT door interlock (17).

9. The PT cabinet with integrated node switch according to claim 1, characterized in that: A second mechanism chamber (40) is provided above the cable chamber (20), and the second mechanism chamber (40) is connected to the cable chamber (20) via a bypass door interlock (18).

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