Air chamber pumping and charging system for circuit breaker maintenance

Abstract

The invention discloses an air chamber pumping and charging system for circuit breaker maintenance, which relates to the technical field of circuit breaker maintenance and comprises an SF6 vacuumizing module, an SF6 compression module, an SF6 charging module, a centralized controller and an operation panel, the SF6 vacuumizing module, the SF6 compression module and the SF6 inflation module are connected with the centralized controller, and the operation panel is provided with a first gas path interface, a second gas path interface, a third gas path interface and a fourth gas path interface; the SF6 vacuumizing module comprises a first gas path pipeline, a first control valve and a vacuum pump; a first control valve is arranged on the first gas path pipeline, and the first gas path pipeline is connected with a vacuum pump; the SF6 compression module comprises a second gas path pipeline, a first manual valve, a third gas path pipeline, a booster pump, an air compressor and a fourth gas path pipeline; and the SF6 inflation module comprises a first air supply pipeline, a third control valve and a fourth control valve. Vacuum pumping operation and air supply operation under different pressures can be achieved, operation is convenient, and the overhauling efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breaker maintenance, and in particular to a gas chamber pumping and charging system for circuit breaker maintenance. Background Art

[0002] With the continuous development of the power system, SF6 circuit breakers have become reliable high-voltage power equipment. However, after long-term operation, the gas inside the SF6 circuit breaker will leak, affecting its reliability and performance. Therefore, the SF6 circuit breaker needs to be refilled. The normal operation of the SF6 circuit breaker requires a certain degree of vacuum. If there are impurities such as dust, moisture, grease, etc. in the SF6 gas, it may reduce the insulation performance of the circuit breaker, thereby affecting the normal operation of the equipment. In order to ensure the normal operation of the equipment, the SF6 circuit breaker needs to be vacuumed.

[0003] At present, the gas replenishment and vacuum extraction of SF6 circuit breakers are achieved through different devices. During on-site operations, different equipment needs to be carried to meet different needs. There is a vacuum extraction device for vacuum extraction and a special gas replenishment device for gas replenishment. When in use, the interface of the device needs to be connected to the SF6 circuit breaker. When different operations are required, different interfaces need to be connected respectively. The installation and disassembly process is cumbersome, and during the connection process, leakage problems are easily caused due to repeated disassembly and assembly.

[0004] Therefore, based on the above problems, there is an urgent need for an air chamber pumping and filling system for circuit breaker maintenance that can conveniently and quickly realize vacuum pumping and air replenishment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and disclose an air chamber pumping and charging system for circuit breaker maintenance.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] The gas chamber pumping and filling system for circuit breaker maintenance includes:

[0008] SF6 vacuum module, SF6 compression module, SF6 charging module, centralized controller and operation panel;

[0009] The SF6 vacuum module, SF6 compression module and SF6 charging module are connected to the centralized controller, and the operation panel is provided with gas circuit interface 1, gas circuit interface 2, gas circuit interface 3 and gas circuit interface 4;

[0010] The SF6 vacuum pumping module comprises: a first gas pipeline, a first control valve and a vacuum pump; the first gas pipeline is provided with a first control valve, and the first gas pipeline is connected to the vacuum pump;

[0011] The SF6 compression module comprises: a second gas pipeline, a first manual valve, a third gas pipeline, a booster pump, an air compressor and a fourth gas pipeline; the second gas pipeline is connected to the third gas pipeline through the first manual valve, the third gas pipeline is connected to the booster pump, the booster pump is connected to the air compressor, and the output end of the booster pump is connected to the fourth gas pipeline;

[0012] The SF6 charging module comprises: a first air supply pipeline, a third control valve and a fourth control valve; the third control valve and the fourth control valve are arranged on the first air supply pipeline.

[0013] As a further technical solution of the present invention, pressure sensors are arranged on the first gas pipeline, the second gas pipeline, the booster pump and the fourth gas pipeline.

[0014] As a further technical solution of the present invention, a first exhaust valve is arranged on the second gas pipeline, and a second exhaust valve is arranged on the fourth gas pipeline.

[0015] As a further technical solution of the present invention, the third direct-acting valve and the fourth direct-acting valve are one-way check valves.

[0016] As a further technical solution of the present invention, the output end of the first air supply pipeline is connected to a pressure sensor.

[0017] As a further technical solution of the present invention, a first temperature sensor is arranged on the first air supply pipeline.

[0018] As a further technical solution of the present invention, a fifth direct-acting valve for exhausting gas is further provided between the third direct-acting valve and the fourth direct-acting valve.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The gas chamber pumping and charging system for circuit breaker maintenance proposed in the present invention, the SF6 vacuum pumping module is used to vacuum the SF6 circuit breaker, and the vacuum pumping operation of the high-voltage circuit breaker and the low-voltage circuit breaker can be realized respectively by setting a plurality of gas pipelines, and the gas replenishment of the circuit breaker can be realized by the SF6 charging module. In the embodiment of the present invention, by setting a set of devices, the vacuum pumping operation and the gas replenishment operation of different pressures can be realized. When in use, it is only necessary to connect the vacuum pumping air inlet or the gas replenishing port to the air inlet of the circuit breaker to be processed, which is convenient to operate, does not require multiple disassembly, and has high maintenance efficiency.

[0021] 2. The gas is compressed by a booster pump to compress the SF6 gas and discharge it into a storage tank through the exhaust outlet for storage. The gas in the circuit breaker is extracted by a vacuum pump to vacuum the short circuit breaker. The first gas pipeline and the second gas pipeline can be respectively configured to connect the high-pressure gas circuit and the low-pressure gas circuit, so that the gas replenishing device can realize the gas replenishing operation of the circuit breaker under different pressure conditions.

[0022] 3. The pressure on the first gas pipeline, the second gas pipeline, the booster pump and the fourth gas pipeline is monitored by setting a pressure sensor, and the pressure signal is fed back to the centralized controller.

[0023] 4. The first exhaust valve is set to manually exhaust the second gas pipeline to prevent the accumulation of high-pressure gas on the second gas pipeline. The second exhaust valve is used to discharge the gas on the fourth gas pipeline to prevent the accumulation of gas in the fourth gas pipeline and avoid safety hazards caused by excessive pressure in the gas pipeline.

[0024] 5. The third direct-acting valve and the fourth direct-acting valve are one-way check valves to prevent gas from flowing back from the circuit breaker during the inflation process.

[0025] 6. The output end of the first air supply pipeline is connected to a pressure sensor for monitoring the gas pressure of the circuit breaker to be supplied with air.

[0026] 7. A first temperature sensor is provided on the first gas supply pipeline to monitor the gas temperature during the gas supply process and provide temperature information for subsequent monitoring.

[0027] 8. By setting the fifth control valve, the gas in the gas supply pipeline can be discharged after the gas supply is completed, which is convenient for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the gas chamber pumping and charging system for circuit breaker maintenance of the present invention;

[0029] Figure 2 This is a control gas circuit structure diagram of the gas chamber pumping and charging system for circuit breaker maintenance of the present invention. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0031] Refer to the attached Figure 1 and Figure 2 , which shows a specific embodiment of the present invention;

[0032] As shown in the figure, the air chamber pumping and charging system for circuit breaker maintenance disclosed in the present invention comprises:

[0033] SF6 vacuum module, SF6 compression module, SF6 charging module, centralized controller and operation panel;

[0034] The SF6 vacuum module, SF6 compression module and SF6 charging module are connected to the centralized controller, and the operation panel is provided with gas circuit interface 1, gas circuit interface 2, gas circuit interface 3 and gas circuit interface 4;

[0035] The SF6 vacuum pump module includes: a first gas pipeline QG1, a first control valve KM1 and a vacuum pump ZKB; the first gas pipeline QG1 is provided with a first control valve KM1, and the first gas pipeline QG1 is connected to the vacuum pump ZKB;

[0036] The SF6 compression module includes: a second gas pipeline QG1, a first manual valve K1, a third gas pipeline QG3, a booster pump ZYB, an air compressor KYJ and a fourth gas pipeline QG4; the second gas pipeline QG2 is connected to the third gas pipeline QG3 through the first manual valve K1, the third gas pipeline QG3 is connected to the booster pump ZYB, the booster pump ZYB is connected to the air compressor KYJ, and the output end of the booster pump ZYB is connected to the fourth gas pipeline QG4;

[0037] The SF6 charging module includes: a first air supply pipeline BQ1, a third control valve KM3, and a fourth control valve KM4; the third control valve KM3 and the fourth control valve KM4 are arranged on the first air supply pipeline BQ1.

[0038] The gas chamber pumping and charging system for circuit breaker maintenance proposed in the present invention, the SF6 vacuum pumping module is used to vacuum the SF6 circuit breaker, and the vacuum pumping operation of the high-voltage circuit breaker and the low-voltage circuit breaker can be realized respectively by setting a plurality of gas pipelines, and the gas replenishment of the circuit breaker can be realized by the SF6 charging module. In the embodiment of the present invention, by setting a set of devices, the vacuum pumping operation and the gas replenishment operation of different pressures can be realized. When in use, it is only necessary to connect the vacuum pumping air inlet or the gas replenishing port to the air inlet of the circuit breaker to be processed, which is convenient to operate, does not require multiple disassembly, and has high maintenance efficiency.

[0039] The gas is compressed by a booster pump to compress the SF6 gas and discharge it into a storage tank through an exhaust outlet for storage, and the gas in the circuit breaker is extracted by a vacuum pump to vacuum the short circuit breaker, wherein the first gas pipeline and the second gas pipeline can be respectively configured to connect the high-pressure gas circuit and the low-pressure gas circuit, and the gas replenishing device realizes the gas replenishing operation of the circuit breaker under different pressure conditions.

[0040] In the embodiment of the present invention, pressure sensors are provided on the first gas pipeline, the second gas pipeline, the booster pump and the fourth gas pipeline. The pressures on the first gas pipeline, the second gas pipeline, the booster pump and the fourth gas pipeline are monitored by providing the pressure sensors, and the pressure signals are fed back to the centralized controller.

[0041] In the embodiment of the present invention, a first exhaust valve is provided on the second gas pipeline, and a second exhaust valve is provided on the fourth gas pipeline. The first exhaust valve is provided to manually exhaust the second gas pipeline to prevent the high-pressure gas on the second gas pipeline from accumulating. The second exhaust valve is used to discharge the gas on the fourth gas pipeline to prevent the gas from accumulating in the fourth gas pipeline, thereby avoiding safety hazards caused by excessive pressure in the gas pipeline.

[0042] In the embodiment of the present invention, the third direct-acting valve and the fourth direct-acting valve are one-way check valves to prevent gas from flowing back from the circuit breaker during the inflation process.

[0043] The output end of the first gas supply pipeline is connected to a pressure sensor P for monitoring the gas pressure of the gas supply circuit breaker. A first temperature sensor T is arranged on the first gas supply pipeline for monitoring the gas temperature during the gas supply process and providing temperature information for later monitoring.

[0044] A fifth direct-acting valve for exhaust is also provided between the third direct-acting valve and the fourth direct-acting valve. By providing the fifth control valve, the gas in the gas supply pipeline can be discharged after the gas supply is completed, which is convenient for operation.

[0045] In the embodiment of the present invention, the first control valve, the second control valve, the third control valve, the fourth control valve and the fifth control valve are direct-acting solenoid valves, which facilitates the control of the centralized controller.

[0046] In the specific operation process, the vacuuming process includes:

[0047] The first vacuum pipeline, QG1, KM1, ZKB;

[0048] Second gas pipeline: QG2, K1, KM2, KM1, ZKB;

[0049] The compression process includes:

[0050] The first compression circuit: QG2, K1, QG3, ZYB, QG4;

[0051] The second compression circuit: QG1, KM2, K1, QG3, ZYB, QG4;

[0052] Air supply circuit: QG1, KM3, BQ1, KM4;

[0053] Air supply and deflation circuit: QG1, KM3, BQ1, KM5.

[0054] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0055] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. The gas chamber pumping and filling system for circuit breaker maintenance is characterized by: include: SF6 vacuum module, SF6 compression module, SF6 charging module, centralized controller and operation panel; The SF6 vacuum module, SF6 compression module and SF6 charging module are connected to the centralized controller, and the operation panel is provided with gas circuit interface 1, gas circuit interface 2, gas circuit interface 3 and gas circuit interface 4; The SF6 vacuum pumping module comprises: a first gas pipeline, a first control valve and a vacuum pump; the first gas pipeline is provided with a first control valve, and the first gas pipeline is connected to the vacuum pump; The SF6 compression module comprises: a second gas pipeline, a first manual valve, a third gas pipeline, a booster pump, an air compressor and a fourth gas pipeline; the second gas pipeline is connected to the third gas pipeline through the first manual valve, the third gas pipeline is connected to the booster pump, the booster pump is connected to the air compressor, and the output end of the booster pump is connected to the fourth gas pipeline; The SF6 charging module comprises: a first air supply pipeline, a third control valve and a fourth control valve; the third control valve and the fourth control valve are arranged on the first air supply pipeline.

2. The air chamber pumping and filling system for circuit breaker maintenance according to claim 1, characterized in that: Pressure sensors are arranged on the first gas pipeline, the second gas pipeline, the booster pump and the fourth gas pipeline.

3. The air chamber pumping and filling system for circuit breaker maintenance according to claim 1, characterized in that: A first exhaust valve is arranged on the second gas pipeline, and a second exhaust valve is arranged on the fourth gas pipeline.

4. The air chamber pumping and filling system for circuit breaker maintenance according to claim 1, characterized in that: The third direct-acting valve and the fourth direct-acting valve are one-way check valves.

5. The air chamber pumping and filling system for circuit breaker maintenance according to claim 1, characterized in that: The output end of the first air supply pipeline is connected to a pressure sensor.

6. The air chamber pumping and filling system for circuit breaker maintenance according to claim 1, characterized in that: A first temperature sensor is arranged on the first air supply pipeline.

7. The air chamber pumping and filling system for circuit breaker maintenance according to claim 1, characterized in that: A fifth direct-acting valve for exhausting gas is further arranged between the third direct-acting valve and the fourth direct-acting valve.

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