Environment-friendly gas insulation ring main unit

Abstract

The utility model discloses an environment-friendly gas insulation ring main unit, which comprises a ring main unit device, the ring main unit device comprises a gas insulation ring main unit, a support frame, a clamping plate, a nitrogen tank, a valve, a fixing bolt, a gas injection pipe, an electromagnetic valve, a handle, a pressure sensor and a rubber sealing ring, the support frame is arranged at the top end of the gas insulation ring main unit, and the clamping plate is arranged at the bottom end of the gas insulation ring main unit. The clamping plates are evenly arranged, the top ends of the clamping plates are fixedly connected to the bottom end of the supporting frame, the nitrogen tank is fixedly installed at the top end of the supporting frame, and the valve is fixedly installed on an output pipe at one end of the nitrogen tank. According to the utility model, nitrogen is used as an insulation medium, the insulation effect of the gas insulation ring main unit is effectively improved, safe and stable operation of an electric power system is guaranteed, automatic monitoring and adjustment of the internal air pressure of the gas insulation ring main unit are realized, and when the internal air pressure is lower than a preset value, nitrogen can be automatically supplemented, and the internal air pressure is kept stable.

Description

Technical Field

[0001] The utility model relates to the electrical field, in particular to an environmentally friendly gas-insulated ring network cabinet. Background Art

[0002] Ring main unit (RMU) is an important equipment in the power system, used to realize the distribution, control and protection of electric energy. Traditional gas-insulated RMUs usually use air or SF6 gas as the insulating medium. However, SF6 gas has a strong greenhouse effect, which has a great impact on the environment. In addition, the gas inside the RMU escapes into the external air, causing the internal air pressure of the RMU to decrease, thereby allowing the external air with impurities to enter the RMU and destroy the insulation effect. Therefore, an environmentally friendly gas-insulated RMU is urgently needed to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide an environmentally friendly gas-insulated ring main unit to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an environmentally friendly gas-insulated ring network cabinet, comprising a ring network cabinet device, wherein the ring network cabinet device comprises a gas-insulated ring network cabinet, a support frame, a card plate, a nitrogen tank, a valve, a fixing bolt, a gas injection pipe, a solenoid valve, a handle, a controller, a rotating handle, a sealing gasket, a pressure sensor and a rubber sealing ring, wherein the support frame is placed on the top of the gas-insulated ring network cabinet, the card plates are evenly arranged, and the top end of the card plates is fixedly connected to the bottom end of the support frame, the nitrogen tank is fixedly installed on the top end of the support frame, and the valve is fixedly installed. On the output pipe at one end of the nitrogen tank, the fixing bolt is threadedly connected to the end of the nitrogen tank close to the valve, the outer side of the rubber sealing ring is fixedly connected to the top inside of the gas insulated ring network cabinet, the bottom end of the gas injection pipe is fixedly inserted into the inside of the rubber sealing ring, the solenoid valve is fixedly installed on the gas injection pipe, the handle is symmetrically fixedly connected to the two ends of the support frame, the controller is fixedly connected to the top of the support frame, the rotating handle is symmetrically fixedly connected to both sides of the fixing bolt, and the sealing gasket is arranged between the nitrogen tank and the gas injection pipe.

[0005] Preferably, the pressure sensor is fixedly connected to the inside of the gas insulated ring main unit.

[0006] Preferably, the inner side of the clamping plate contacts the outer side of the top end of the gas-insulated ring main unit.

[0007] Preferably, a clamping ring is provided at one end of the air injection pipe close to the fixing bolt, and a pull ring matching the clamping ring is provided at one end of the fixing bolt close to the air injection pipe, and the fixing bolt is slidably connected to the air injection pipe.

[0008] Preferably, the controller and the solenoid valve are electrically connected via wire, and the controller and the pressure sensor are connected via wireless signals.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] The utility model utilizes nitrogen as an insulating medium. Nitrogen has excellent insulating properties and can effectively improve the insulation effect of the gas-insulated ring network cabinet, thereby ensuring the safe and stable operation of the power system. Through the cooperation of the controller, the solenoid valve and the pressure sensor, automatic monitoring and adjustment of the internal air pressure of the gas-insulated ring network cabinet is realized. When the internal air pressure is lower than a predetermined value, nitrogen can be automatically replenished to keep the internal air pressure stable, thereby reducing the need for manual monitoring and intervention and improving work efficiency. Through the design of the support frame and the handle, the nitrogen tank can be conveniently moved and installed on the top of the gas-insulated ring network cabinet, thereby simplifying the installation process and improving the convenience of operation. The sealing effect is enhanced by the sealing ring to reduce nitrogen loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the ring main unit device in the present utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the ring main unit device in the present utility model;

[0014] Figure 4 This is a partial structural diagram of the ring main unit device in the present utility model.

[0015] In the figure: 1-ring main unit device, 2-gas insulated ring main unit, 3-support frame, 4-pallet, 5-nitrogen tank, 6-valve, 7-fixing bolt, 8-gas injection pipe, 9-solenoid valve, 10-handle, 11-controller, 12-rotating handle, 13-sealing gasket, 14-pressure sensor, 15-rubber sealing ring. DETAILED DESCRIPTION

[0016] 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.

[0017] See also Figure 1-4The utility model provides an embodiment: an environmentally friendly gas insulated ring network cabinet, including a ring network cabinet device 1, the ring network cabinet device 1 includes a gas insulated ring network cabinet 2, a support frame 3, a card plate 4, a nitrogen tank 5, a valve 6, a fixing bolt 7, a gas injection pipe 8, a solenoid valve 9, a handle 10, a controller 11, a rotating handle 12, a sealing gasket 13, a pressure sensor 14 and a rubber sealing ring 15, the support frame 3 is placed on the top of the gas insulated ring network cabinet 2, the card plates 4 are evenly arranged, and the top of the card plates 4 is fixedly connected to the bottom end of the support frame 3, and the nitrogen tank 5 is fixedly mounted on the top of the support frame 3. End, the valve 6 is fixedly mounted on the output pipe at one end of the nitrogen tank 5, the fixing bolt 7 is threadedly connected to the end of the nitrogen tank 5 near the valve 6, the outer side of the rubber sealing ring 15 is fixedly connected to the top inside of the gas insulated ring network cabinet 2, the bottom end of the gas injection pipe 8 is fixedly inserted into the inside of the rubber sealing ring 15, the solenoid valve 9 is fixedly mounted on the gas injection pipe 8, the handle 10 is symmetrically fixedly connected to the two ends of the support frame 3, the controller 11 is fixedly connected to the top of the support frame 3, the rotating handle 12 is symmetrically fixedly connected to both sides of the fixing bolt 7, and the sealing gasket 13 is arranged between the nitrogen tank 5 and the gas injection pipe 8.

[0018] The pressure sensor 14 is fixedly connected to the inside of the gas-insulated ring main unit 2 , and the pressure data inside the gas-insulated ring main unit 2 is monitored in real time by the pressure sensor 14 .

[0019] The inner side of the clamping plate 4 contacts the outer side of the top of the gas-insulated ring main unit 2 , and the clamping plate 4 is used to limit the support frame 3 , so that the support frame 3 is clamped on the top of the gas-insulated ring main unit 2 .

[0020] A clamping ring is provided at one end of the gas injection pipe 8 close to the fixing bolt 7, and a pull ring matching the clamping ring is provided at one end of the fixing bolt 7 close to the gas injection pipe 8, and the fixing bolt 7 is slidably connected to the gas injection pipe 8, and the fixing bolt 7 is threadedly connected to the nitrogen tank 5, and the clamping ring is pulled by the pull ring to achieve extrusion sealing of the sealing gasket 13.

[0021] The controller 11 and the solenoid valve 9 are electrically connected by wire, and the controller 11 and the pressure sensor 14 are wirelessly connected. The controller 11 controls the opening and closing of the solenoid valve 9 through the pressure data transmitted by the pressure sensor 14 to maintain the nitrogen pressure inside the gas-insulated ring main unit 2.

[0022] Working principle: During use, the air inside the gas insulated ring network cabinet 2 is first extracted through a vacuum pump, and the nitrogen tank 5 is filled with high-pressure nitrogen. Then, the nitrogen tank 5 is fixed in the mounting bracket on the support frame 3, and then the handle 10 is lifted by external force. The movement of the handle 10 drives the support frame 3 to move, thereby driving the nitrogen tank 5 to move to the top of the gas insulated ring network cabinet 2, and then the card plate 4 is nested on the outside of the top of the gas insulated ring network cabinet 2, and then the sealing gasket 13 is placed between the nitrogen tank 5 and the gas injection pipe 8. The end of the nitrogen tank 5 close to the valve 6 squeezes the sealing gasket 13 close to the gas injection pipe 8, and then the handle 12 is pushed by external force to turn the fixing bolt 7 and rotate the threaded connection on the nitrogen tank 5 until the pull ring inside the fixing bolt 7 is close to the clamping ring on the gas injection pipe 8, thereby pressing the sealing gasket 13 again to enhance the sealing effect. When the equipment in the gas insulated ring network cabinet 2 is installed and sealed After sealing, the valve 6 is opened by external force, and the solenoid valve 9 is controlled to open by the controller 11. The high-pressure nitrogen in the nitrogen tank 5 is injected into the interior of the gas-insulated ring network cabinet 2 through the gas injection pipe 8. The pressure sensor 14 transmits the air pressure data inside the gas-insulated ring network cabinet 2 to the controller 11 in real time. When the air pressure data transmitted by the pressure sensor 14 reaches a predetermined value, the controller 11 controls the solenoid valve 9 to close. After a period of time, the nitrogen inside the gas-insulated ring network cabinet 2 escapes into the external air, causing the air pressure inside the gas-insulated ring network cabinet 2 to decrease. At this time, the controller 11 receives the air pressure data transmitted by the pressure sensor 14 that is lower than the predetermined value. The controller 11 controls the solenoid valve 9 to open, and the nitrogen in the nitrogen tank 5 continues to be filled into the gas-insulated ring network cabinet 2 until the air pressure reaches the predetermined value, thereby achieving sufficient nitrogen inside the gas-insulated ring network cabinet 2 to achieve the insulation effect.

[0023] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly gas-insulated ring main unit (RMU), comprising a RMU device (1), characterized in that: The ring network cabinet device (1) comprises a gas-insulated ring network cabinet (2), a support frame (3), a card plate (4), a nitrogen tank (5), a valve (6), a fixing bolt (7), a gas injection pipe (8), a solenoid valve (9), a handle (10), a controller (11), a rotating handle (12), a sealing gasket (13), a pressure sensor (14) and a rubber sealing ring (15); the support frame (3) is placed on the top of the gas-insulated ring network cabinet (2); the card plates (4) are evenly arranged, and the top of the card plates (4) is fixedly connected to the bottom of the support frame (3); the nitrogen tank (5) is fixedly installed on the top of the support frame (3); and the valve (6) is fixedly installed on the output pipe at one end of the nitrogen tank (5). The fixing bolt (7) is threadedly connected to one end of the nitrogen tank (5) near the valve (6), the outer side of the rubber sealing ring (15) is fixedly connected to the top inside of the gas insulated ring network cabinet (2), the bottom end of the gas injection pipe (8) is fixedly inserted into the inside of the rubber sealing ring (15), the solenoid valve (9) is fixedly installed on the gas injection pipe (8), the handle (10) is symmetrically fixedly connected to the two ends of the support frame (3), the controller (11) is fixedly connected to the top of the support frame (3), the rotating handle (12) is symmetrically fixedly connected to both sides of the fixing bolt (7), and the sealing gasket (13) is arranged between the nitrogen tank (5) and the gas injection pipe (8).

2. The environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that: The pressure sensor (14) is fixedly connected to the interior of the gas-insulated ring main unit (2).

3. The environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that: The inner side of the clamping plate (4) contacts the outer side of the top end of the gas-insulated ring network cabinet (2).

4. The environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that: A clamping ring is provided at one end of the air injection pipe (8) close to the fixing bolt (7), and a pull ring matching the clamping ring is provided at one end of the fixing bolt (7) close to the air injection pipe (8), and the fixing bolt (7) is slidably connected to the air injection pipe (8).

5. The environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that: The controller (11) and the solenoid valve (9) are electrically connected via wires, and the controller (11) and the pressure sensor (14) are connected via wireless signals.

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