CN110401133A - A gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear - Google Patents

Abstract

A kind of gas-insulated high-voltage switchgear assembly gas compensation and thermoregulating system, belong to technical field of electric equipment, including counterweight, stroke sensor, piston, gas tank, air gauge, radiator, crossflow fan, axial flow blower, temperature sensor, heater, controller, pipeline and valve, the present invention can be applied to the field of employment of gas-insulated high-voltage switchgear assembly, the insulating gas leakage and adjusting insulating gas temperature of effective compensation gas Insulating A High-Voltage switchgear gas tank, traditional gas Insulating A High-Voltage switchgear gas is overcome to leak, high temperature heat dissipation, low-temperature operation there are the problem of, it can be realized the safe and stable operation of gas-insulated high-voltage switchgear assembly and realize non-maintaining or few maintenance, structure is simplified, advantage of lower cost, it being capable of large-scale promotion.

Description

A gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear

technical field

The invention belongs to the technical field of electrical equipment, and in particular relates to a gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear.

Background technique

In the high-voltage power supply system, with the rapid development of the national economy, urban and rural power distribution, rail transit, mining metallurgy and other fields have put forward higher requirements for the use environment of high-voltage switchgear, such as anti-pollution, less maintenance, etc. In this context, gas-insulated high-voltage switchgear is widely used. The main feature of this switchgear is that the cabinet body adopts steel plate laser welding and gas-sealed insulation technology, and the components such as switch components, measuring sensors, and transmission mechanisms are enclosed in the cabinet. In the air box, the volume is only 1/2 to 1/3 of the traditional switchgear, and the floor space is significantly reduced; and the components are not affected by the external environment, and the service life is much longer than the traditional switchgear, with miniaturization, high reliability, free Maintenance and other advantages.

At present, there have been three key issues in the operation of gas-insulated high-voltage switchgear that have attracted much attention:

1. The tightness of the air box

The connection between high-voltage switch components and the operating mechanism, kinetic energy transmission and status indication must pass through the gas box. Although new sealing materials and new sealing technologies continue to develop, the leakage of insulating gas is inevitable, so we can only find a way Reduce gas leakage rate;

2. The heat dissipation of the air box

Since the switching components, measuring sensors, transmission mechanisms and other components are enclosed in the air box, the thermal effect of the components will be very significant during the power-on operation of the equipment. The thermal effect will reduce the strength of the mechanism, accelerate the aging of the insulating support, and shorten the service life of the switchgear;

3. Reliability of low-temperature start-up and operation of the switch

In the cold winter, and there is no operating place with heating facilities, the lubricating effect of the grease or lubricating fluid of the mechanism will be greatly reduced, or even solidified. During the switching operation, the flexibility of the mechanism will be affected, which may cause the switch It cannot be reliably closed and opened, and in severe cases, it will cause power supply failure.

In summary, there is an urgent need for a new technical solution to solve the above technical problems.

Contents of the invention

The technical problem to be solved by the present invention is: to provide a gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear, which can be applied to the use place of gas-insulated high-voltage switchgear, can compensate for leaked gas in time, and can It can send out alarms or operation commands from time to time, and can also control the temperature of insulating gas from time to time, providing a new technical solution for the safe and stable operation of power switchgear.

A gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear, characterized in that it includes weights, travel sensors, pistons, gas boxes, barometers, radiators, cross-flow fans, axial fans, temperature sensors, heaters, Controller, pipes and valves, the air box is a sealed structure, connected to the high-voltage switchgear air box through a pipe, and a valve is arranged on the pipe; the heater is arranged on the lower side of the inside of the air box; the axial flow fan is arranged on the The upper part of the heater inside the air box; the radiator is arranged in the middle of the air box; the cross-flow fan is arranged in the lower part of the radiator; the air pressure gauge is arranged outside the air box; The upper part of the inner side of the box; the weight is set on the upper part of the piston; the stroke sensor is set outside the gas box to measure the position of the piston; there are two temperature sensors, which are respectively set in the gas box and the high-voltage switchgear gas box Inside: the controller is arranged outside the air box and is connected with a temperature sensor, a stroke sensor, a heater, a cross-flow fan and an axial-flow fan.

The heat sink is a corrugated grid heat dissipation device, the grids increase the heat dissipation area, and the gaps between the grids conduct heat dissipation.

The inside of the gas box is filled with insulating gas.

The barometer is a gas pressure sensor, which displays the gas pressure inside the gas box.

The weight is a gas pressure regulating module in the gas box, and the weight or quantity of the weight can be increased or decreased as required.

Through the above design scheme, the present invention can bring the following beneficial effects:

1. It can constantly compensate the insulating gas content inside the gas box of gas-insulated high-voltage switchgear to ensure the insulation performance and breaking performance of switch components;

2. The temperature of the insulating gas can be lowered in time through the radiator and the fan, thereby reducing the operating temperature of the switch parts and insulating parts, and prolonging the service life of the insulating parts;

3. The temperature of the insulating gas can be raised through the heater and the axial flow fan, thereby improving the flexibility of the transmission of the internal parts of the gas box, and ensuring the reliability of the switchgear at low temperature operation;

4. Be able to monitor the volume of the gas source from time to time, grasp the tightness of the gas box of the high-voltage switchgear, and replenish the insulating gas in time;

5. Through the sliding of the piston and the deformation of the radiator grid, it can be used as a volume compensation device for the "thermal expansion and contraction" of the gas box of the high-voltage switchgear.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is a schematic structural diagram of a gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear according to the present invention.

In the figure 1-weight, 2-stroke sensor, 3-piston, 4-air tank, 5-barometer, 6-radiator, 7-cross flow fan, 8-axial flow fan, 9-temperature sensor, 10-heating Device, 11-controller, 12-pipeline, 13-valve, 14-high pressure switchgear gas box.

Detailed ways

A gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear, as shown in Fig. Flow fan 8, temperature sensor 9, heater 10, controller 11, pipeline 12 and valve 13, described gas box 4 is connected with high-voltage switchgear gas box 14 through pipeline 12, is provided with valve 13 on pipeline 12, gas box 4 For the sealed structure, the interior is filled with insulating gas, and the temperature and pressure of the insulating gas in the high-voltage switchgear gas box are changed by adjusting the temperature and pressure of the gas in the gas box;

The heater 10 is arranged on the lower side inside the gas box 4 to heat the insulating gas at low temperature;

The axial flow fan 8 is arranged on the upper part of the heater 10 inside the gas box 4, which can accelerate the gas circulation inside the gas box;

The radiator 6 is arranged in the middle of the air box 4, and the radiator 6 is a corrugated grid type cooling device, which can increase the heat dissipation area through the grids and dissipate heat through the "chimney effect" between the grids;

The cross-flow fan 7 is arranged at the bottom of the radiator 6, which can accelerate the air circulation between the radiator 6 grids;

The barometer 5 is a gas pressure sensor, which is arranged outside the gas box 4 and can directly observe the pressure of the insulating gas;

The piston 3 is T-shaped, and is arranged on the inner upper part of the air box 4, and the volume of the air box 4 can be adjusted, and automatically slides up and down by comparing the pressure of the insulating gas with the set pressure to make it reach the design pressure;

The weight 1 is arranged on the top of the piston 3, and is a gas pressure regulating module in the gas box 4, and the gas pressure in the gas box 4 is adjusted by adjusting the number or weight of the weight 1;

The stroke sensor 2 is arranged outside the gas box 4, which can measure the position of the piston 3 in real time, and then obtain the volume and content of the insulating gas;

There are two temperature sensors 9, which are respectively arranged inside the gas box 4 and the high-voltage switchgear gas box 14, and can measure the temperature of the insulating gas inside the gas box 4 and the high-voltage switchgear gas box 14 in real time;

The controller 11 is an intelligent control device, which is arranged outside the air box 4 and is connected with the temperature sensor 9, the stroke sensor 2, the heater 10, the cross flow fan 7 and the axial flow fan 8, and can convert and upload the stroke sensor and the temperature sensor in real time When the air source in the air box is insufficient, it will remind the operation and maintenance personnel to replenish the air in time, and at the same time, it can control the start and stop of the fan and heater.

The present invention carries out the process of real-time gas compensation and temperature adjustment as follows: as shown in Figure 1, the direction of the arrow in the figure is the direction of gas flow, and the gas box 4 of this system is connected with the gas box 14 of the high-voltage switchgear with the pipeline 12 and the valve 13. , connect the controller 11 to the control power supply, and set the start-up conditions of the cross-flow fan 7, the axial-flow fan 8 and the heater 10 according to the design requirements.

When the temperature of the insulating gas is high, the fan will be started for forced air cooling. When the temperature reaches the set value of 20°C to 40°C, the axial flow fan 8 will be started, and the temperature will reach 40°C to 40°C within the set time. When the temperature setting value is 60°C, start the cross-flow fan 7, or start the cross-flow fan 7 and the axial-flow fan 8 together.

When the temperature of the insulating gas is low, the axial flow fan 8 will be started first, and then the heater 10 will be started regularly. When the temperature reaches the set temperature, the heater 10 will be turned off first, and the axial flow fan 8 will be turned off at last.

Through the above method, the leakage of the insulating gas can be effectively compensated and the temperature of the insulating gas can be adjusted. The patented invention has simple structure, low cost and strong usability, and is worthy of vigorous promotion in the field of high-voltage electrical switchgear.

Claims (5)

1. A gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear, characterized in that it includes a weight (1), a stroke sensor (2), a piston (3), an air tank (4), and a barometer (5) , radiator (6), cross flow fan (7), axial flow fan (8), temperature sensor (9), heater (10), controller (11), pipeline (12) and valve (13), said The gas box (4) is a sealed structure, connected with the high-voltage switchgear gas box (14) through the pipeline (12), and the pipeline (12) is provided with a valve (13); the heater (10) is arranged on the gas box (4 ) inside the lower side; the axial flow fan (8) is arranged on the top of the air box (4) internal heater (10); the radiator (6) is arranged in the middle of the air box (4); the cross flow fan ( 7) It is arranged on the bottom of the radiator (6); the air pressure gauge (5) is arranged on the outside of the air box (4); the piston (3) is T-shaped and arranged on the inner upper part of the air box (4); The weight (1) is arranged on the top of the piston (3); the stroke sensor (2) is arranged outside the air box (4) to measure the position of the piston (3); the temperature sensor (9) is two one, respectively arranged inside the gas box (4) and the high-voltage switchgear gas box (14); the controller (11) is arranged outside the gas box (4), connected with the temperature sensor (9), stroke sensor (2), The heater (10), the cross-flow fan (7) and the axial-flow fan (8) are connected. 2. A gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear according to claim 1, characterized in that: the radiator (6) is a corrugated grid heat dissipation device, the grid sheet increases the heat dissipation area, and the grid The gap between the chips for heat dissipation. 3. A gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear according to claim 1, characterized in that: the gas box (4) is filled with insulating gas. 4. A gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear according to claim 1, characterized in that: the barometer (5) is a gas pressure sensor, which displays the gas pressure inside the gas box (4). 5. A gas compensation and temperature adjustment system for gas-insulated high-voltage switchgear according to claim 1, characterized in that: the weight (1) is a gas pressure adjustment module in the gas box (4), which can be adjusted as needed Increase or decrease the weight or quantity of the weight (1).