An SF6 gas leak detector calibration device and usage method for GIS equipment

Abstract

The present invention discloses an SF6 gas leak detector calibration device and a usage method for GIS equipment, including a gas storage module for realizing the gas storage function. A gas configuration module and a gas recovery device are provided at the right end of the gas storage module, and an electrical instrument control unit is provided below the gas configuration module. By providing the gas storage module, the gas configuration module and the gas recovery device, the present invention realizes the functions of simple and fast standard gas configuration operation, high gas concentration control accuracy, convenient and easy-to-operate detection method, fast detection speed and good economy; provides detection methods and devices for different types of leak detectors, has strong versatility, and is effectively applicable to detecting leak detectors of various different brands; is equipped with a simple separator and a gas recovery tank, can effectively recover and reuse the detected gas, and greatly reduces gas leakage.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection and calibration, and particularly to an SF6 gas leak detector calibration device and a usage method for GIS equipment. Background Technique

[0002] In recent years, with the continuous increase in the national electricity consumption rate, the construction and development of the power grid have been rapid. To meet the requirements of reliability, the number of GIS equipment used in the power system has increased sharply. Compared with other electrical equipment, it has the advantages of small occupied space, low probability of failure during operation, and the internal part of the electrical equipment is not affected by the external environment, and it has a high usage rate in electrical equipment.

[0003] SF6 gas leakage is one of the reasons for accidents in GIS equipment. SF6 gas leakage will cause many impacts, including the reduction of the insulation ability of the device and the reduction of the reliability during the use of the equipment. Therefore, by using an SF6 gas leak detector to detect power equipment, the probability of power equipment accidents can be effectively reduced, and at the same time, the emission of SF6 gas can be reduced. Moreover, frequently calibrating the SF6 gas leak detector can improve the reliability of the SF6 gas leak detector and the safety level of maintenance personnel during work.

[0004] However, the existing SF6 gas leak detectors often use the standard gas method, the test method, and the syringe gas mixing method for calibration. However, the standard gas method and the test method generally have high test costs, complex operations, and cannot make a quick test response in case of emergency, and have poor versatility. While the syringe gas mixing method is convenient to use and the equipment is simple, the accuracy of the gas concentration prepared by it is low.

[0005] Therefore, an SF6 gas leak detector calibration device and a usage method for GIS equipment are provided to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an SF6 gas leak detector calibration device and a usage method for GIS equipment. By providing a gas storage module, a gas configuration module, and a gas recovery device, the functions of simple and rapid standard gas configuration operation are realized, and the gas concentration control accuracy is high. At the same time, the detection method is convenient to operate, the detection speed is fast, and the economy is good, so as to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] An SF6 gas leak detector calibration device for GIS equipment, comprising: a gas storage module for realizing the gas storage function, a gas configuration module and a gas recovery device are provided at the right end of the gas storage module, and an electrical instrument control unit is provided below the gas configuration module.

[0009] Preferably, the gas storage module includes an SF6 gas storage tank and an N2 gas storage tank. Electric valves are connected to both the SF6 gas storage tank and the N2 gas storage tank. A flowmeter is connected to the right end of the electric valve, a pressure reducing valve is connected to the right end of the flowmeter, and a gas configuration module is connected to the right end of the pressure reducing valve.

[0010] Preferably, the gas configuration module includes a gas preparation gas tank and a measurement gas chamber. The pressure reducing valve is connected to the left end of the gas preparation gas tank through a pipeline. An electronic pressure gauge and a pressure regulating valve are connected to the top of the gas preparation gas tank. The electronic pressure gauge is located on the left side of the pressure regulating valve. The right end of the gas preparation gas tank is connected to the measurement gas chamber through a manual valve 1. A detection hole and a detection cavity are connected to the right end of the measurement gas chamber. The detection hole is sealed with a rubber ring. A sealing cover is provided for the detection cavity. A gas recovery device is connected to the bottom end of the measurement gas chamber.

[0011] Preferably, the gas recovery device includes a simple separator. The bottom end of the measurement gas chamber is connected to the simple separator through a manual valve 2. A gas recovery tank is connected to the bottom end of the simple separator.

[0012] Preferably, the electrical instrument control unit is connected to the electric valve, the flowmeter, and the electronic pressure gauge through electrical instrument lines.

[0013] The present invention provides a method for using an SF6 gas leak detector calibration device for a GIS device, including the following steps: The SF6 gas storage tank and the N2 gas storage tank are connected to the gas preparation gas tank through a pressure reducing valve and a flowmeter. The pressure of the high-pressure gas storage tank is reduced by the pressure reducing valve so that the gas flow rate in the pipeline is the same as that in the standard air pressure. The concentration of the configured gas is set in the electrical instrument control unit. The electrical instrument control unit precisely controls the flow rates of the SF6 gas and the N2 gas by controlling the flowmeter. The electronic pressure gauge can precisely reflect the pressure of the gas chamber to be measured. The data is transmitted to the electrical instrument control unit through the instrument line. When the set gas configuration concentration is reached, the electric valve is automatically closed to stop gas distribution;

[0014] Open the manual valve 1, and input the configured pure SF6 gas or a mixed gas of SF6 and N2 with different concentrations into the measurement gas chamber. When calibrating an SF6 gas leak detector with a probe, insert the probe into the measurement gas chamber through the detection hole at the right end of the measurement gas chamber to detect the concentration of the SF6 gas. After the detection is completed, pull out the probe and verify the detection data;

[0015] When calibrating an SF6 gas leak detector without a probe, after the configured gas fills the measurement gas chamber, place the detector to be calibrated in the detection box, open the sealing cover, detect the concentration of SF6 gas, close the sealing cover after the detection is completed, take out the detector, and calibrate the detection data;

[0016] When the entire calibration is completed, open the second manual valve. The remaining SF6 gas in the measurement gas chamber will enter the SF6 gas collection device under the action of gas pressure. After standing the device for a period of time, close the second manual valve, and the gas will be stored in the gas recovery tank through the simple gas separator.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. For the SF6 gas leak detector calibration device and its use method of a GIS device according to the present invention, the degree of automation is high, the operation of standard gas configuration is simple and fast, the control accuracy of gas concentration is high, and at the same time, the detection method is easy to operate and the detection speed is fast, with good economy.

[0019] 2. For the SF6 gas leak detector calibration device and its use method of a GIS device according to the present invention, there are detection methods and devices for different types of leak detectors, with strong versatility and effectively applicable to detecting leak detectors of various brands.

[0020] 3. For the SF6 gas leak detector calibration device and its use method of a GIS device according to the present invention, it is equipped with a simple separator and a gas recovery tank, which can effectively recycle the detected gas and greatly reduce gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of an SF6 gas leak detector calibration device and its use method of a GIS device according to the present invention;

[0022] Figure 2 is a schematic gas circuit diagram of an SF6 gas leak detector calibration device and its use method of a GIS device according to the present invention.

[0023] In the figure: 101, SF6 gas storage tank; 102, N2 gas storage tank; 103, electric valve; 104, flowmeter; 105, pressure reducing valve; 201, gas preparation gas tank; 202, measurement gas chamber; 203, electronic pressure gauge; 204, pressure regulating valve; 205, detection hole; 206, detection cavity; 207, first manual valve; 208, sealing cover; 301, simple separator; 401, recovery tank; 501, second manual valve; 601, electrical instrument control unit; 6001, electrical instrument wire. DETAILED DESCRIPTION OF THE INVENTION

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 to 2 , the present invention provides an SF6 gas leak detector calibration device for GIS equipment, including: a gas storage module for realizing the gas storage function, a gas configuration module and a gas recovery device are arranged at the right end of the gas storage module, and an electrical instrument control unit is arranged below the gas configuration module.

[0026] The gas storage module includes an SF6 gas storage tank and an N2 gas storage tank. Both the SF6 gas storage tank and the N2 gas storage tank are connected with an electric valve. The right end of the electric valve is connected with a flow meter, the right end of the flow meter is connected with a pressure reducing valve, and the right end of the pressure reducing valve is connected with the gas configuration module.

[0027] The gas configuration module includes a gas preparation gas tank and a measurement gas chamber. The pressure reducing valve is connected to the left end of the gas preparation gas tank through a pipeline. The top of the gas preparation gas tank is connected with an electronic pressure gauge and a pressure regulating valve. The electronic pressure gauge is located on the left side of the pressure regulating valve. The right end of the gas preparation gas tank is connected to the measurement gas chamber through a hand valve I. The right end of the measurement gas chamber is connected with a detection hole and a detection cavity. The detection hole is sealed with a rubber ring. The detection cavity is provided with a sealing cover. The bottom end of the measurement gas chamber is connected with a gas recovery device.

[0028] The gas recovery device includes a simple separator. The bottom end of the measurement gas chamber is connected to the simple separator through a hand valve II. The bottom end of the simple separator is connected with a gas recovery tank.

[0029] The electrical instrument control unit is connected to the electric valve, the flow meter, and the electronic pressure gauge through electrical instrument lines.

[0030] The present invention provides a usage method for an SF6 gas leak detector calibration device for GIS equipment, including the following steps: The SF6 gas storage tank and the N2 gas storage tank are connected to the gas preparation gas tank through a pressure reducing valve and a flow meter. The pressure of the high-pressure gas storage tank is reduced through the pressure reducing valve so that the gas flow rate in the pipeline is the same as that in the standard air pressure. The configured gas concentration is set in the electrical instrument control unit. The electrical instrument control unit realizes precise control of the flow rates of the SF6 gas and the N2 gas by controlling the flow meter. The electronic pressure gauge can accurately reflect the pressure of the gas chamber to be measured. The data is transmitted to the electrical instrument control unit through the instrument line. The electric valve is automatically closed to stop gas distribution when the set gas configuration concentration is reached;

[0031] Open the hand valve 1, and input the configured pure SF6 gas or the mixed gas of SF6 and N2 with different concentrations into the measuring chamber. When calibrating the SF6 gas leak detector with a probe, through the detection hole at the right end of the measuring chamber, insert the probe into the measuring chamber to detect the concentration of SF6 gas. After the detection is completed, pull out the probe and calibrate the detection data.

[0032] When calibrating the SF6 gas leak detector without a probe, after the configured gas fills the measuring chamber, put the detector to be calibrated into the detection box, open the sealing cover, detect the concentration of SF6 gas. After the detection is completed, close the sealing cover, take out the detector, and calibrate the detection data.

[0033] When the whole calibration is completed, open the hand valve 2. The remaining SF6 gas in the measuring chamber will enter the SF6 gas collection device under the action of gas pressure. After standing the device for a period of time, close the hand valve 2, and the gas will be stored in the gas recovery tank through the simple gas separator.

[0034] In summary, the SF6 gas leak detector calibration device and its usage method for GIS equipment provided by the present invention have a high degree of automation, simple and fast standard gas configuration operation, high gas concentration control accuracy, convenient and easy-to-operate detection method, fast detection speed, and good economy; there are detection methods and devices for different types of leak detectors, with strong versatility, and are effectively applicable to detecting leak detectors of various different brands; equipped with a simple separator and a gas recovery tank, which can effectively recycle and reuse the detected gas, and greatly reduce gas leakage.

[0035] The above embodiments show and describe the basic working principle, the main technical features and advantages of the present invention. However, the SF6 gas leak detector calibration device designed for GIS equipment of the present invention is not limited by the above embodiments, and there will be various changes and improvements in different embodiments. These changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A calibration device for SF6 gas leak detectors of GIS equipment, characterized in that Including: A gas storage module for realizing the gas storage function. A gas configuration module and a gas recovery device are provided at the right end of the gas storage module, and an electrical instrument control unit (601) is provided below the gas configuration module; The gas storage module includes an SF6 gas storage tank (101) and an N2 gas storage tank (102). Electric valves (103) are connected to both the SF6 gas storage tank (101) and the N2 gas storage tank (102). A flowmeter (104) is connected to the right end of the electric valve (103). A pressure reducing valve (105) is connected to the right end of the flowmeter (104). The pressure reducing valve (105) is connected to the gas configuration module at its right end; The gas configuration module includes a gas preparation gas tank (201) and a measurement gas chamber (202). The pressure reducing valve (105) is connected to the left end of the gas preparation gas tank (201) through a pipeline. An electronic pressure gauge (203) and a pressure regulating valve (204) are connected to the top of the gas preparation gas tank (201). The electronic pressure gauge (203) is located on the left side of the pressure regulating valve (204). The right end of the gas preparation gas tank (201) is connected to the measurement gas chamber (202) through a first manual valve (207). A detection hole (205) and a detection chamber (206) are connected to the right end of the measurement gas chamber (202). The detection hole (205) is sealed with a rubber ring. A sealing cover (208) is provided on the detection chamber (206). The bottom end of the measurement gas chamber (202) is connected to a gas recovery device.

2. The calibration device for the SF6 gas leak detector of a GIS device according to claim 1, characterized in that: The gas recovery device includes a simple separator (301). The bottom end of the measurement gas chamber (202) is connected to the simple separator (301) through a second manual valve (501). The bottom end of the simple separator (301) is connected to a gas recovery tank (401).

3. The SF6 gas leak detector calibration device for a GIS device according to claim 1, characterized in that: The electrical instrument control unit (601) is connected to the electric valve (103), the flowmeter (104), and the electronic pressure gauge through electrical instrument lines (6001).

4. A method for using an SF6 gas leak detector calibration device of a GIS device according to any one of claims 1-3, characterized in that, Including the following steps: The SF6 gas storage tank (101) and the N2 gas storage tank (102) are connected to the gas preparation gas tank through the pressure reducing valve (105) and the flowmeter (104). The pressure of the high-pressure gas storage tank is reduced by the pressure reducing valve (105) so that the gas flow rate in the pipeline is the same as that in the standard air pressure. The concentration of the configured gas is set in the electrical instrument control unit (601). The electrical instrument control unit (601) realizes precise control of the flow rates of SF6 gas and N2 gas by controlling the flowmeter (104). The electronic pressure gauge can accurately reflect the pressure of the gas chamber to be measured. The data is transmitted to the electrical instrument control unit (601) through the instrument line. The electric valve (103) is automatically closed to stop gas distribution when the set gas configuration concentration is reached; Open the hand valve 1 (207), and input the configured pure SF6 gas or the mixed gas of SF6 and N2 with different concentrations into the measurement chamber (202). When calibrating an SF6 gas leak detector with a probe, insert the probe into the measurement chamber (202) through the detection hole (205) at the right end of the measurement chamber (202) to detect the concentration of SF6 gas. After the detection is completed, pull out the probe and calibrate the detection data. When calibrating an SF6 gas leak detector without a probe, after the configured gas fills the measurement chamber (202), put the detector to be calibrated into the detection box, open the sealing cover (208), detect the concentration of SF6 gas. After the detection is completed, close the sealing cover (208), take out the detector, and calibrate the detection data. When the entire calibration is completed, open the hand valve 2 (501). The remaining SF6 gas in the measurement chamber (202) will enter the SF6 gas collection device under the action of gas pressure. After standing the device for a period of time, close the hand valve 2 (501), and the gas will be stored in the gas recovery tank (401) through the simple gas separator (301).

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