Environment-friendly gas-insulated metal-enclosed switchgear

Abstract

The utility model discloses an environment-friendly gas-insulated metal-enclosed switchgear, which particularly relates to the technical field of gas-insulated metal-enclosed switchgears, and comprises an equipment mechanism box, and a circuit breaker, an isolating switch, a grounding switch, a CT (current transformer), a PT (potential transformer), a lightning arrester and a bus which are arranged in the equipment mechanism box, the other side of the equipment mechanism box is fixedly connected with an instrument box, and the bottom of the equipment mechanism box is fixedly connected with a gas box. Dry air is adopted as an insulating medium, the influence of equipment on the environment is greatly reduced, the green and environment-friendly concept is met, moving and static contacts of the vacuum circuit breaker can be made of copper-chromium alloy materials, and the core function of the vacuum circuit breaker is that a circuit is rapidly cut off or connected through a vacuum arc extinguishing technology, so that the system safety is guaranteed; fault current can be quickly cut off when a line is abnormal, a main loop is designed in cooperation with a uniform electric field, and the insulation performance of the main loop of switch equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of gas-insulated metal-enclosed switchgear, and more specifically, to an environmentally friendly gas-insulated metal-enclosed switchgear. Background Technology

[0002] Insulated metal-enclosed switchgear, typically referring to gas-insulated metal-enclosed switchgear, uses sulfur hexafluoride gas as the insulating and arc-extinguishing medium. It selects and controls circuit breakers, disconnectors, fast grounding switches, etc., and performs centralized control at the terminal. At the same time, it monitors the operating status of these switches, the density and pressure of sulfur hexafluoride gas in each chamber in real time to achieve electrical interlocking between switches in this bay.

[0003] However, most commonly used insulated metal-enclosed switchgear on the market currently uses sulfur hexafluoride as the insulation and arc-quenching medium. Insulated metal-enclosed switchgear using this method has an extremely high greenhouse effect potential, causing serious negative impacts on the environment. Therefore, an environmentally friendly gas-insulated metal-enclosed switchgear is proposed. Utility Model Content

[0004] In order to overcome the problems and defects in the prior art, this utility model provides an environmentally friendly gas-insulated metal-enclosed switchgear to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly gas-insulated metal-enclosed switchgear, comprising a device housing and its internal circuit breakers, disconnectors, grounding switches, current transformers (CTs), power PTs (PTs), surge arresters, and busbars. A cable box is fixedly connected to one side of the device housing, and an instrument box is fixedly connected to the other side of the device housing.

[0006] A gas box is fixedly connected to the bottom of the equipment mechanism box. A side busbar is provided on the front side of the gas box. A fixed column is fixedly installed on the top of the inner wall of the gas box. A fixed frame is fixedly connected to the bottom of the fixed column. A vacuum circuit breaker is fixedly installed on the top of the fixed frame. An adsorption drying tower is installed inside the cable box. An air circulation pump is installed on one side of the adsorption drying tower. Two circulating air pipes are fixedly connected between the air circulation pump and the adsorption drying tower.

[0007] Preferably, the air circulation pump is fixedly installed on one side of the vacuum circuit breaker.

[0008] Preferably, the cable box is equipped with a cable box door on the top, and the equipment mechanism box is equipped with a mechanism box door on the top.

[0009] Preferably, an instrument door is installed on the top of the instrument box, a busbar box is fixedly connected to one side of the instrument box, and a busbar box header is fixedly connected to the top of the busbar box.

[0010] Preferably, a pressure relief channel is fixedly connected to the bottom of the gas box.

[0011] Preferably, the gas box adopts a stainless steel welded sealing structure, and the inner wall is sprayed with a conductive coating and grounded.

[0012] Preferably, the vacuum circuit breaker is fixed to the mounting frame by an epoxy resin insulating support, and the moving and stationary contacts of the vacuum circuit breaker can be made of copper-chromium alloy.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. By abandoning the traditional sulfur hexafluoride and using N2 as the insulation and arc-quenching medium, the negative impact of the equipment on the environment is greatly reduced, which is in line with the concept of green environmental protection. The moving and stationary contacts of the vacuum circuit breaker can be made of copper-chromium alloy. Its core function is to quickly cut off or connect the circuit through vacuum arc-quenching technology to ensure system safety. In case of line abnormality, it can quickly cut off the fault current, realize reliable protection of the line and equipment, reduce the scope of fault impact, and improve the stability and reliability of power grid operation. The air circulation pump continuously drives the air in the air box to flow through the adsorption drying tower, which adsorbs moisture in time, ensuring that the dry air in the air box is always in a good dry state, stabilizing the insulation performance, extending the service life of the equipment, and reducing the probability of failure caused by humidity problems.

[0015] 2. The air box adopts a stainless steel welded sealed structure, with a conductive coating sprayed on the inner wall and grounded, to create a closed and insulated space. Combined with low-pressure dry air, epoxy resin insulated supports, and a specific insulation structure, it effectively isolates high-voltage conductors and components, ensuring that the equipment reaches the rated insulation level. It can stably cope with the complex operating conditions of high-voltage and high-capacity power grids, ensuring safe and reliable power transmission. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a partial structural schematic diagram of the present invention.

[0018] Figure 3 This is a schematic diagram of the rear view structure of this utility model.

[0019] Figure 4 This is a top view of the structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the internal structure of the gas box of this utility model.

[0021] The attached diagram is labeled as follows: 1. Equipment mechanism box; 2. Cable box; 3. Instrument box; 4. Air box; 5. Side busbar outlet; 6. Fixed column; 7. Fixed frame; 8. Vacuum circuit breaker; 9. Adsorption drying tower; 10. Air circulation pump; 11. Circulating air pipe; 12. Cable box door; 13. Mechanism box door; 14. Instrument door; 15. Busbar box; 16. Busbar box header; 17. Pressure relief channel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] As attached Figure 1-5 The environmentally friendly gas-insulated metal-enclosed switchgear shown includes a device housing 1 and its internal circuit breakers, disconnectors, grounding switches, current transformers (CTs), current transformers (PTs), surge arresters, and busbars. A cable box 2 is fixedly connected to one side of the device housing 1, and an instrument box 3 is fixedly connected to the other side of the device housing 1.

[0024] An air box 4 is fixedly connected to the bottom of the equipment mechanism box 1. A side busbar end 5 is provided on the front side of the air box 4. A fixed column 6 is fixedly installed on the top of the inner wall of the air box 4. A fixed frame 7 is fixedly connected to the bottom of the fixed column 6. A vacuum circuit breaker 8 is fixedly installed on the top of the fixed frame 7. An adsorption drying tower 9 is installed inside the cable box 2. An air circulation pump 10 is installed on one side of the adsorption drying tower 9. Two circulating air pipes 11 are fixedly connected between the air circulation pump 10 and the adsorption drying tower 9.

[0025] As attached Figure 5 As shown, the air circulation pump 10 is fixedly installed on one side of the vacuum circuit breaker 8 to ensure the stability of the air circulation pump 10.

[0026] As attached Figure 1-4 As shown, cable box 2 is equipped with cable box door 12 on top, equipment mechanism box 1 is equipped with mechanism box door 13 on top, instrument box 3 is equipped with instrument door 14 on top, busbar box 15 is fixedly connected to one side of instrument box 3, and busbar box 15 is fixedly connected to the top of busbar box 15, so as to facilitate the inspection and maintenance of each box.

[0027] As attached Figure 1-3 As shown, a pressure relief channel 17 is fixedly connected to the bottom of the air box 4 to prevent excessive internal pressure.

[0028] As attached Figure 1-5As shown, the gas box 4 adopts a stainless steel welded sealing structure, the inner wall is sprayed with a conductive coating and grounded, and the vacuum circuit breaker 8 is fixed to the fixing frame 7 by an epoxy resin insulating support. The moving and stationary contacts of the vacuum circuit breaker 8 can be made of copper-chromium alloy to ensure insulation effect and arc extinguishing characteristics.

[0029] The working principle of this utility model is as follows: The equipment uses N2 instead of traditional sulfur hexafluoride as the insulating medium. The gas box 4 adopts a stainless steel welded sealed structure, with a conductive coating sprayed on the inner wall and grounded to form a closed insulating space. Low-pressure dry air is placed inside the gas box 4. The vacuum circuit breaker 8 is fixed to the fixed frame 7 by epoxy resin insulating supports and a specific insulating structure, which seals or metallizes the high-voltage conductor or high-voltage component to meet the requirements of the rated insulation level. The moving and stationary contacts of the vacuum circuit breaker 8 can be made of copper-chromium alloy. Vacuum breaking technology is used to control and protect the line. When the line is running normally, the vacuum circuit breaker 8 closes, and the load current passes through its moving and stationary contacts. When the line experiences overload current or short-circuit current, the vacuum circuit breaker 8 quickly breaks the fault current to protect the line and equipment.

[0030] The adsorption drying tower 9 and the air circulation pump 10 inside the cable box 2 work together to maintain the dryness of the air in the air box 4. The air circulation pump 10 is fixedly installed on one side of the vacuum circuit breaker 8 and is fixedly connected to the adsorption drying tower 9 through two circulating air pipes 11. The air circulation pump 10 drives the air in the air box 4 to flow through the adsorption drying tower 9. The adsorption drying tower 9 adsorbs the moisture in the air, and the dried air returns to the air box 4 to ensure the stable insulation performance of the dry air in the air box 4.

[0031] The equipment control box 1 integrates circuit breakers, disconnect switches, grounding switches, current transformers (CTs), power supply transformers (PTs), surge arresters, and key busbar components. It is the core control area of ​​the entire equipment, responsible for realizing circuit switching, measurement, and protection functions. The cable box 2 on one side of the equipment control box 1 is used to connect cables, and the cable box door 12 on the top facilitates cable installation and maintenance. The instrument box 3 on the other side is used to install monitoring instruments, and the instrument door 14 on the top facilitates instrument operation and maintenance. The busbar box 15 on one side and the busbar box header 16 on the top are used for busbar connection and fixation. The side busbar outlet 5 on the front of the gas box 4 is used to lead out the busbar. The pressure relief channel 17 at the bottom can release pressure in time when the pressure inside the gas box 4 rises abnormally, ensuring equipment safety.

[0032] In conclusion, the above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An environmentally friendly gas-insulated metal-enclosed switchgear, comprising a device housing (1) and its internal circuit breakers, disconnectors, grounding switches, current transformers (CTs), potential transformers (PTs), surge arresters, and busbars, characterized in that: A cable box (2) is fixedly connected to one side of the equipment mechanism box (1), and an instrument box (3) is fixedly connected to the other side of the equipment mechanism box (1). The bottom of the equipment mechanism box (1) is fixedly connected to an air box (4). A side busbar end (5) is provided on the front side of the air box (4). A fixed column (6) is fixedly installed on the top of the inner wall of the air box (4). A fixed frame (7) is fixedly connected to the bottom of the fixed column (6). A vacuum circuit breaker (8) is fixedly installed on the top of the fixed frame (7). An adsorption drying tower (9) is installed inside the cable box (2). An air circulation pump (10) is installed on one side of the adsorption drying tower (9). Two circulating air pipes (11) are fixedly connected between the air circulation pump (10) and the adsorption drying tower (9).

2. The environmentally friendly gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The air circulation pump (10) is fixedly installed on one side of the vacuum circuit breaker (8).

3. The environmentally friendly gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The cable box (2) is equipped with a cable box door (12) on top, and the equipment mechanism box (1) is equipped with a mechanism box door (13) on top.

4. The environmentally friendly gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The instrument box (3) is equipped with an instrument door (14) on the top, and a busbar box (15) is fixedly connected to one side of the instrument box (3). A busbar box header (16) is fixedly connected to the top of the busbar box (15).

5. The environmentally friendly gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The bottom of the gas box (4) is fixedly connected to a pressure relief channel (17).

6. The environmentally friendly gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The gas box (4) adopts a stainless steel welded sealing structure, with an inner wall coated with a conductive coating and grounded.

7. The environmentally friendly gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The vacuum circuit breaker (8) is fixed to the mounting frame (7) by an epoxy resin insulating support, and the moving and stationary contacts of the vacuum circuit breaker (8) can be made of copper-chromium alloy.

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