CN110364955A - An air-insulated ring network cabinet - Google Patents

Abstract

The invention relates to the field of power switch equipment, and discloses an air-insulated ring network cabinet. The air-insulated ring network cabinet includes a closed box, a vacuum circuit breaker and a three-position isolation switch. The closed box includes a mechanism room. The mechanism room is provided with an isolation switch mechanism and a circuit breaker operating mechanism, and an expansion insulator is arranged in the closed box. , the expansion insulator is configured to be connected to the outside; the vacuum circuit breaker is set in the closed box and connected with the circuit breaker operating mechanism, the vacuum circuit breaker includes a vacuum interrupter and a contact, and one end of the vacuum interrupter is connected to the contact , the other end is connected with the expansion insulator; the three-position isolating switch is arranged in the airtight box, and is located below the vacuum circuit breaker, and the three-position isolating switch is connected with the isolating switch mechanism. The invention improves the insulation performance of the air-insulated ring network cabinet, makes the structure simple, easy to install, occupies small volume, saves energy and protects the environment, and avoids the use of SF6 gas to increase the greenhouse effect.

Description

An air-insulated ring network cabinet

technical field

The invention relates to the field of power switchgear, in particular to an air-insulated ring network cabinet.

Background technique

In the power supply network system, in order to improve the reliability of power supply, the power supply network is usually connected in a ring shape, so that users can obtain power from two directions. This power supply method is referred to as ring network power supply. The ring network cabinet is the core switchgear in the ring network power supply equipment, and its core part uses load switches and fuses. Ring main unit usually adopts SF6 gas insulation or air insulation. SF6 gas has good insulation performance and arc extinguishing performance, but SF6 is a greenhouse gas. The insulation performance of air is lower than that of SF6 gas, so the existing air-insulated ring main unit is restricted by factors such as the insulation performance of air and the external environment. In order to achieve the preset insulation performance, the existing air-insulated ring main unit is usually Large, complex installation, high construction cost.

SUMMARY OF THE INVENTION

Based on the above problems, the purpose of the present invention is to provide an air-insulated ring network cabinet with good insulation performance, convenient installation and small occupied volume.

For achieving the above object, the present invention adopts the following technical solutions:

An air-insulated ring main unit, comprising:

an airtight box, including a mechanism room, the mechanism room is provided with an isolating switch mechanism and a circuit breaker operating mechanism, and an expansion insulator is arranged in the closed box, and the expansion insulator is configured to be connected to the outside;

The vacuum circuit breaker is arranged in the airtight box and connected with the circuit breaker operating mechanism. The vacuum circuit breaker includes a vacuum interrupter and a contact, and one end of the vacuum interrupter is connected to the contact. connected, and the other end is connected with the expansion insulator;

The three-position isolating switch is arranged in the airtight box and located below the vacuum circuit breaker, and the three-position isolating switch is connected with the isolating switch mechanism.

As a preferred solution of the air-insulated ring main unit of the present invention, the three-position isolation switch includes an isolation switch, an outlet insulator is arranged in the airtight box, and the isolation switch is connected to the outlet insulator through a connecting bus.

As a preferred solution of the air-insulated ring main unit of the present invention, the airtight box further includes a cable room, the cable room is located below the mechanism room, and an external cable and a cable plug are arranged in the cable room. A plug is connected to the outgoing insulator through the external cable, and the cable plug is configured to be connected to the outside.

As a preferred solution of the air-insulated ring main unit of the present invention, a middle partition is arranged in the airtight box along the horizontal direction, the mechanism room is located above the middle partition, and the cable room is located on the middle partition below.

As a preferred solution of the air-insulated ring main unit of the present invention, the cable chamber is provided with a lower partition along the vertical direction, and the lower partition divides the cable chamber into a first accommodating cavity and a second accommodating cavity. The outgoing line insulator, the external cable and the cable plug are all located in the first accommodating cavity, and a pressure relief channel is arranged in the second accommodating cavity.

As a preferred solution of the air-insulated ring main unit of the present invention, the other end of the vacuum interrupter is connected to the expansion insulator through a flexible connection cable.

As a preferred solution of the air-insulated ring main unit of the present invention, the airtight box is filled with dry air.

As a preferred solution of the air-insulated ring main unit of the present invention, the airtight box is provided with a front mounting plate and a rear mounting plate, one side of the vacuum circuit breaker is mounted on the front mounting plate, and the vacuum circuit breaker is installed on the front mounting plate. The other side is mounted on the rear mounting plate.

As a preferred solution of the air-insulated ring main unit of the present invention, the inner side wall of the airtight box is provided with a left side plate and a right side plate, and both the left side plate and the right side plate are used to support the airtight box box.

As a preferred solution of the air-insulated ring main unit of the present invention, a low-voltage instrument box is arranged on the top of the airtight box, and the low-voltage instrument box is used for arranging control components and detection components.

The beneficial effects of the present invention are:

In the air-insulated ring network cabinet provided by the present invention, the vacuum circuit breaker and the three-position isolating switch are fully enclosed and arranged in the airtight box, and the isolating switch mechanism and the circuit breaker operating mechanism are isolated and arranged in the mechanism room of the airtight box. The expansion insulator for connecting with the outside is arranged in the box. The vacuum interrupter is used as the main arc extinguishing component. One end of the vacuum interrupter is connected to the contact, and the other end is connected to the expansion insulator. The arc is transmitted to the outside through the expansion insulator to form The fully enclosed conductive circuit improves the insulation performance of the air-insulated ring network cabinet, makes the structure simple, easy to install, small in size, saves the user's construction cost, saves energy and protects the environment, reduces the user's operation and maintenance cost, and avoids the The use of SF6 gas aggravates the greenhouse effect.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained according to the contents of the embodiments of the present invention and these drawings without creative efforts.

1 is a side view of an air-insulated ring network cabinet provided by a specific embodiment of the present invention;

Fig. 2 is a front view of an air-insulated ring network cabinet provided by a specific embodiment of the present invention.

In the picture:

1- airtight box; 2- vacuum circuit breaker; 3- three-position disconnector; 4- low-voltage instrument box;

11-mechanism room; 12-extension insulator; 13-outlet insulator; 14-cable room; 15-middle plate; 16-front mounting plate; 17-rear mounting plate; 18-left side plate; 19-right side plate;

111- isolating switch mechanism; 112- circuit breaker operating mechanism;

141-external cable; 142-cable plug; 143-lower partition;

21-vacuum interrupter; 22-contact; 23-soft connection cable;

31-isolated knife switch; 32-connected busbar.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. Therein, the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

This embodiment provides an air-insulated ring main unit, which is used in a power supply system to improve power supply reliability. As shown in FIG. 1 and FIG. 2 , the air-insulated ring network cabinet includes a closed box 1 , a vacuum circuit breaker 2 and a three-position isolation switch 3 .

Specifically, the airtight box 1 includes a mechanism room 11, and the mechanism room 11 is provided with an isolating switch mechanism 111 and a circuit breaker operating mechanism 112, and an expansion insulator 12 is provided in the closed box 1, and the expansion insulator 12 is configured to be connected to the outside . The vacuum circuit breaker 2 is arranged in the airtight box 1 and connected to the circuit breaker operating mechanism 112. The vacuum circuit breaker 2 includes a vacuum interrupter 21 and a contact 22. One end of the vacuum interrupter 21 is connected to the contact 22. The other end is connected to the extension insulator 12 . Optionally, the other end of the vacuum interrupter 21 is connected to the expansion insulator 12 through a flexible connection cable 23, and the flexible connection cable 23 can be a flexible connection of a copper bar, which has strong conductivity, large current capacity, small resistance value, and long life. durable. The three-position isolating switch 3 is arranged in the airtight box 1 and is located below the vacuum circuit breaker 2 , and the three-position isolating switch 3 is connected with the isolating switch mechanism 111 .

The vacuum circuit breaker 2 and the three-position isolating switch 3 are fully enclosed in the airtight case 1 , and the isolating switch mechanism 111 and the circuit breaker operating mechanism 112 are isolated in the mechanism chamber 11 of the airtight case 1 . An expansion insulator 12 for connecting with the outside is arranged in the airtight box 1, and the vacuum interrupter 21 is used as the main arc extinguishing component. The expansion insulator 12 is connected, and the arc is transmitted to the outside through the expansion insulator 12 to form a fully enclosed conductive loop, which improves the insulation performance of the air-insulated ring network cabinet, makes the structure simple, easy to install, small in size, and saves the user's time. Construction cost, energy saving and environmental protection, reduce the user's operation and maintenance cost, and avoid the use of SF6 gas to increase the greenhouse effect.

In order to further improve the insulation performance of the air-insulated ring main unit, optionally, the three-position isolation switch 3 includes an isolation switch 31, and an outlet insulator 13 is provided in the airtight box 1, and the isolation switch 31 connects the bus 32 with the outlet. The insulator 13 is connected. By connecting the bus bar 32, the arc generated at the isolation switch 31 is conducted to the outgoing line insulator 13, which improves the insulation performance of the air-insulated ring main unit. In order to prevent the environmental factors of external connection from affecting the insulation performance of the air-insulated ring network cabinet, optionally, the airtight box 1 further includes a cable room 14, the cable room 14 is located below the mechanism room 11, and an external cable is arranged in the cable room 14. 141 and a cable plug 142, the cable plug 142 is connected to the outlet insulator 13 through an external cable 141, and the cable plug 142 is configured to be connected to the outside. By connecting the cable plug 142 connected to the outside with the outgoing wire insulator 13 via the external cable, the influence of the external environment on the insulation performance of the air-insulated ring main unit is prevented. In order to ensure that the functions of each part in the airtight box 1 are clearly distinguished, optionally, the airtight box 1 is provided with a middle partition plate 15 along the horizontal direction, the mechanism room 11 is located above the middle partition plate 15, and the cable room 14 is located in the middle partition. below the plate 15. In order to facilitate the division of the cable compartment 14, optionally, a lower partition 143 is provided in the cable compartment 14 along the vertical direction, and the lower partition 143 divides the cable compartment 14 into a first accommodating cavity and a second accommodating cavity, the outlet insulators 13, Both the external cable 141 and the cable plug 142 are located in the first accommodating cavity. In order to facilitate the pressure relief in the airtight box 1 as required, optionally, a pressure relief channel is provided in the second accommodating cavity.

In order to improve the insulation performance of the air-insulated ring network cabinet, optionally, the airtight box 1 is filled with dry air. In order to facilitate the fixed installation of the vacuum circuit breaker 2, optionally, a front mounting plate 16 and a rear mounting plate 17 are provided in the airtight box 1, one side of the vacuum circuit breaker 2 is mounted on the front mounting plate 16, and the The other side is mounted on the rear mounting plate 17 . In order to ensure the structural strength of the airtight box body 1, optionally, the inner side wall of the airtight box body 1 is provided with a left side plate 18 and a right side plate 19, and the left side plate 18 and the right side plate 19 are used to support the airtight box body. 1, wherein the left side plate 18 is abutted against the left inner side wall of the airtight case 1 , and the right side plate 19 is abutted against the right inner side wall of the airtight case 1 . In order to facilitate the arrangement of other components, optionally, a low-voltage instrument box 4 is provided on the top of the airtight box 1, and the low-voltage instrument box 4 is used for arranging control components and detection components.

In the air-insulated ring network cabinet provided in this embodiment, the vacuum circuit breaker 2 and the three-position isolating switch 3 are completely enclosed and arranged in the airtight box 1, and the isolating switch mechanism 111 and the circuit breaker operating mechanism 112 are isolated and arranged in the airtight box. In the mechanism chamber 11 of the body 1, an expansion insulator 12 for connecting with the outside is arranged in the airtight box 1. The vacuum interrupter 21 is used as the main arc extinguishing component. One end of the vacuum interrupter 21 is connected to the contact 22, and the other One end is connected to the expansion insulator 12 through the flexible connection cable 23, and the arc is transmitted to the outside through the expansion insulator 12 to form a fully enclosed conductive circuit, which improves the insulation performance of the air-insulated ring main unit, making the structure simple and easy to install. The small occupied volume saves the user's construction cost, saves energy and protects the environment, reduces the user's operation and maintenance cost, and avoids the use of SF6 gas to exacerbate the greenhouse effect.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope is determined by the scope of the appended claims.

Claims (10)

1. a kind of air insulation ring network cabinet characterized by comprising

Closed case (1), including mechanism chamber (11), the mechanism chamber (11) is interior to be provided with isolating switch mechanism (111) and open circuit Device operating mechanism (112), interior be provided with of the closed case (1) expand insulator (12), and the expansion insulator (12) is matched It is set to and external connection；

Vacuum circuit breaker (2) is set in the closed case (1), and connect with the breaker operation mechanism (112), institute Stating vacuum circuit breaker (2) includes vacuum interrupter (21) and contact (22), one end and the touching of the vacuum interrupter (21) Head (22) connection, the other end are connect with the expansion insulator (12)；

Tri-station isolating switch (3) is set in the closed case (1), and is located at the lower section of the vacuum circuit breaker (2), The tri-station isolating switch (3) connect with the isolating switch mechanism (111).

2. air insulation ring network cabinet according to claim 1, which is characterized in that the tri-station isolating switch (3) includes Isolation switch (31), the closed case (1) is interior to be provided with outlet insulator (13), and the isolation switch (31) is female by connection Line (32) is connect with the outlet insulator (13).

3. air insulation ring network cabinet according to claim 2, which is characterized in that the closed case (1) further includes cable Room (14), the cable vault (14) are located at the lower section of the mechanism chamber (11), are provided with external cable in the cable vault (14) (141) and cable plug (142), the cable plug (142) pass through the external cable (141) and the outlet insulator (13) it connects, the cable plug (142) is configured as and external connection.

4. air insulation ring network cabinet according to claim 3, which is characterized in that along level side in the closed case (1) To being provided with middle partition (15), the mechanism chamber (11) is located at the top of the middle partition (15), and the cable vault (14) is located at The lower section of the middle partition (15).

5. air insulation ring network cabinet according to claim 3, which is characterized in that in the cable vault (14) along the vertical direction It is provided with lower clapboard (143), the cable vault (14) are divided into the first accommodating chamber and second and accommodated by the lower clapboard (143) Chamber, the outlet insulator (13), the external cable (141) and the cable plug (142) are respectively positioned on described first and accommodate It is intracavitary, pressure release passage is provided in second accommodating chamber.

6. air insulation ring network cabinet according to claim 1, which is characterized in that the other end of the vacuum interrupter (21) It is connect by the winding displacement that is flexible coupling (23) with the expansion insulator (12).

7. air insulation ring network cabinet according to claim 1, which is characterized in that filled with dry in the closed case (1) Dry air.

8. air insulation ring network cabinet according to claim 1, which is characterized in that before being provided in the closed case (1) The side of mounting plate (16) and rear mounting plate (17), the vacuum circuit breaker (2) is installed on the front mounting plate (16), described The other side of vacuum circuit breaker (2) is installed on the rear mounting plate (17).

9. air insulation ring network cabinet according to claim 1, which is characterized in that on the inner sidewall of the closed case (1) It is provided with left plate (18) and right side plate (19), the left plate (18) and the right side plate (19) are used to support described closed Cabinet (1).

10. -9 described in any item air insulation ring network cabinets according to claim 1, which is characterized in that the closed case (1) Top is provided with low pressure instrument box (4), and the low pressure instrument box (4) is for arranging manipulation component and detection component.