CN109459184B - Device for providing SF6 gas leakage standard source of electrical equipment and using method thereof - Google Patents
Device for providing SF6 gas leakage standard source of electrical equipment and using method thereof Download PDFInfo
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- CN109459184B CN109459184B CN201811528457.4A CN201811528457A CN109459184B CN 109459184 B CN109459184 B CN 109459184B CN 201811528457 A CN201811528457 A CN 201811528457A CN 109459184 B CN109459184 B CN 109459184B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 239000000945 filler Substances 0.000 claims abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000000344 soap Substances 0.000 claims description 2
- 238000003331 infrared imaging Methods 0.000 abstract description 10
- 238000003384 imaging method Methods 0.000 abstract description 8
- 238000012795 verification Methods 0.000 abstract description 2
- 229910018503 SF6 Inorganic materials 0.000 description 49
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 49
- 238000001514 detection method Methods 0.000 description 11
- 229960000909 sulfur hexafluoride Drugs 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/007—Leak detector calibration, standard leaks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a device for SF6 gas leakage standard source of electrical equipment and a use method thereof, wherein the device comprises a closed cavity, a gas tank and an SF6 steel cylinder, wherein the gas tank and the SF6 steel cylinder are arranged, so that the gas tank can maintain constant output gas pressure, thereby ensuring that the closed cavity has certain gas pressure, and accurately simulating the SF6 gas leakage condition of high-voltage electrical equipment under certain gas pressure; the filler is filled in the cavity, the farther the distance between the air inlet pipe and the air outlet pipe is, the larger the resistance of the air is, the lower the pressure of the air reaches the air outlet pipe, and the lower the amount of the released air is; the closer the distance between the air inlet pipe and the air outlet pipe is, the higher the pressure when the air reaches the air outlet pipe is, the larger the amount of the released air is, so that SF6 air leakage conditions under different air leakage amounts can be conveniently simulated, the air leakage amount is metered and calibrated, and the accurate verification of the imaging resolution performance of the SF6 infrared imaging leak detector is realized.
Description
Technical Field
The invention relates to the technical field of sulfur hexafluoride gas-insulated high-voltage electrical equipment overhaul, in particular to a device for providing an SF6 gas leakage standard source for electrical equipment and a use method thereof.
Background
Sulfur hexafluoride (SF 6) gas is widely used in high voltage electrical equipment due to its good insulation and arc extinguishing properties. Due to factors such as equipment manufacturing, installation, quality difference and aging, the SF6 electrical equipment generally has trace leakage, SF6 gas density is reduced due to leakage, compressive strength and breaking capacity of the SF6 electrical equipment are reduced, and serious consequences are brought to safe operation of a power grid. The conventional quantitative leakage detection method for SF6 electrical equipment adopts the methods of buckling cover method, bottle hanging method, local binding method and the like proposed in GB/T11023-1989 sulfur hexafluoride gas sealing test method for high-voltage switch equipment to calculate the annual leakage rate. With the continuous development of modern live detection technology, infrared imaging leak detection technology has been gradually applied to SF6 gas leak detection work, so that under the condition of no power failure, the leakage condition in electrical equipment is intuitively found in real time, and the SF6 gas leakage source is accurately judged. A great deal of application experience at home and abroad shows that the application of the infrared imaging leak detector mainly has the following problems: (1) it is difficult to detect a minute leakage amount; (2) After the instrument works frequently for a long period, a focal plane imaging system can drift, so that the imaging sensitivity is obviously reduced, and false detection of equipment gas leakage faults can be caused; (3) The imaging effect is a relatively subjective evaluation system and has a great relationship with an observer. Therefore, the SF6 gas infrared imaging leak detector can cause false detection and missing detection of equipment gas leakage faults in the application process, threatens the safe and stable operation of power equipment, and brings great loss to power production.
At present, no feasible checking method exists for the leakage detecting instrument, and the existing standard sources, such as the standard source for realizing SF6 gas micro leakage by pushing a cylinder by adopting a stepping motor, or the standard source adopting SF6 and air distribution principle, are all leakage in normal pressure state, and do not completely simulate the pressure leakage of high-voltage electric equipment. The quick and accurate detection of the leakage point on site depends on the reliability of the leakage detection instrument, so that the detection sensitivity of the leakage detection equipment has practical significance.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a device for simulating a standard source of SF6 gas under-pressure leakage and a use method thereof.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the utility model provides a device of electrical equipment SF6 gas leakage standard source, includes inclosed cavity, gas pitcher and SF6 steel bottle, the cavity bottom is provided with the blast pipe, be provided with the valve on the blast pipe, install the flowmeter on the blast pipe, be provided with a plurality of intake pipes in the direction of height of cavity, intake pipe evenly distributed is in the direction of height of cavity, be provided with the valve in the intake pipe, connect through first connecting pipe between a plurality of intake pipes, first connecting pipe is connected with the gas outlet of gas pitcher, the gas pitcher is provided with pressure sensor, be provided with the relief pressure valve on the air inlet of gas pitcher, the air inlet of gas pitcher is connected with the gas outlet of SF6 steel bottle, be provided with the valve on the gas outlet of SF6 steel bottle, the packing that is used for delaying gas flow is filled to the cavity.
Further, the valve on the air inlet pipe is an electromagnetic valve.
Further, the flowmeter installed on the exhaust pipe is a soap bubble type flowmeter.
Further, the output pressure of the SF6 steel cylinder is more than 0.8Mpa.
Further, the filler is one or more of stainless steel powder, copper powder or inorganic ceramic powder.
Further, the number of the air inlet pipes is 6, and the cavity is made of stainless steel materials.
The invention also provides a use method of the device for providing the SF6 gas leakage standard source of the electrical equipment, which comprises the following steps:
(1) Filling SF6 gas into the SF6 steel cylinder to ensure that the output pressure of the SF6 steel cylinder is more than 0.8Mpa;
(2) Opening a valve on an air outlet of the SF6 steel cylinder to charge the air tank, adjusting a pressure reducing valve, opening a valve on an exhaust pipe, and simultaneously adjusting a valve on an air inlet pipe to ensure that the air tank is kept at constant air pressure;
(3) The gas discharge amount was read out by a flow meter.
Further, the air pressure in the air tank in the step (2) is kept between 0.4MPa and 0.8MPa.
The beneficial effects of the technical scheme adopted by the invention are as follows: 1. the invention provides a device of SF6 gas leakage standard source of electrical equipment and a use method thereof, wherein the device is provided with a gas tank and an SF6 steel cylinder, so that the gas tank can maintain constant output gas pressure, thereby ensuring that a certain gas pressure exists in a closed cavity, and accurately simulating the SF6 gas leakage condition of high-voltage electrical equipment under a certain gas pressure; 2. the cavity is filled with filler, and a plurality of air inlet pipes are uniformly distributed in the height direction of the cavity, and the resistance of the air inlet pipes is different when the air flows due to different distances between the air inlet pipes and the air outlet pipes; the farther the distance between the air inlet pipe and the air outlet pipe is, the larger the resistance of the air is, the lower the pressure of the air reaches the air outlet pipe, and the less the amount of the released air is, so that the situation can simulate the state that the electric equipment has smaller air leakage; the closer the distance between the air inlet pipe and the air outlet pipe is, the higher the pressure when the air reaches the air outlet pipe is, the larger the amount of the released air is, and the condition that the electric equipment has larger air leakage can be simulated, and the plurality of air inlet pipes are arranged so as to conveniently simulate SF6 air leakage conditions under different air leakage amounts, measure and calibrate the air leakage amount, and realize accurate verification of the imaging resolution performance of the SF6 infrared imaging leak detector; 3. the device has simple structure, high accuracy in checking the imaging resolution performance of the SF6 infrared imaging leak detector and easy popularization and application.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples, which do not constitute any limitation of the invention.
As shown in fig. 1, the device for providing the standard source of SF6 gas leakage of electrical equipment comprises a sealed cavity 1, a gas tank 2 and an SF6 steel bottle 3, wherein the bottom of the cavity 1 is provided with a gas exhaust pipe 4, a valve is arranged on the gas exhaust pipe 4, a flowmeter is arranged on the gas exhaust pipe 4, 6 gas inlets 5 are arranged in the height direction of the cavity 1, the gas inlets 5 are uniformly distributed in the height direction of the cavity 1, the gas inlets 5 are provided with valves, the 6 gas inlets 5 are connected through a first connecting pipe 6, the first connecting pipe 6 is connected with a gas outlet of the gas tank 2, a communicating pipe 8 communicated with the gas tank 2 is arranged on the gas tank 2, the gas tank 2 is provided with a pressure sensor 7, the pressure sensor 7 is arranged on the end part of the communicating pipe 8, the pressure sensor 7 is used for measuring the pressure of the gas tank 2 at the moment, a pressure level of the gas tank is determined, a pressure reducing valve 8 is arranged on a gas inlet of the gas tank 2, a gas inlet of the gas tank 2 is connected with a gas outlet of the SF6 steel bottle 1, the gas outlet of the gas tank 1 is provided with the valve, the SF6 is fully filled with the valve 1, the pressure of the gas tank 1 is filled with the stainless steel bottle 1, and the pressure of the stainless steel is 0.0 is filled in the stainless steel bottle is filled with the stainless steel in the cavity, and the pressure of the stainless steel is filled with the stainless steel in the cavity 1.
The device for providing the SF6 gas leakage standard source of the electrical equipment comprises the following steps that valves on 6 air inlet pipes 5 are numbered as V1-V6 in sequence from top to bottom:
(1) Filling SF6 gas into the SF6 steel cylinder 3 to ensure that the output pressure of the SF6 steel cylinder 3 is more than 0.8Mpa;
(2) Opening a valve on an air outlet of the SF6 steel bottle 3 to charge air to the air tank 2, adjusting a pressure reducing valve, opening a valve on the exhaust pipe 4, and simultaneously adjusting a valve on the air inlet pipe 5 to ensure that the air pressure in the air tank 2 is kept between 0.4MPa and 0.8MPa;
(3) Reading the flow rate and the discharge amount of the gas discharged from the exhaust pipe 4 through a flowmeter;
(4) The tested SF6 infrared imaging leak detector is placed at a position 3m (+ -0.1 m) away from a device of an SF6 gas leakage standard source of electrical equipment, the tested SF6 infrared imaging leak detector is started, the focal length is adjusted to enable the tested SF6 infrared imaging leak detector to be capable of clearly imaging, the video is recorded for 1min, then the stored video is called out, and the divergence definition degree of SF6 gas in the video is observed to check the field use effect and imaging resolution performance of the SF6 infrared imaging leak detector.
Table 1 below gives the gas leakage flow rates corresponding to the exhaust pipe 4 for the different pressure intervals of the gas tank 2:
TABLE 1
The following table 2 shows the opening conditions of the valve on the air inlet pipe 5 under different pressure intervals of the air tank 2 with different SF6 gas leakage flow rates:
TABLE 2
As can be seen from the measurement results in tables 1 and 2, the opening and closing combinations of the valves on the air inlet pipe 5 can be automatically controlled according to the requirements to output sulfur hexafluoride gas with different flow rates and leakage amounts, so as to simulate the standard source of gas leakage of the sulfur hexafluoride gas-insulated electrical equipment.
The foregoing has shown and described the basic principles and features of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The device for providing the SF6 gas leakage standard source of the electrical equipment is characterized by comprising a closed cavity, a gas tank and an SF6 steel cylinder, wherein the bottom of the cavity is provided with an exhaust pipe, a valve is arranged on the exhaust pipe, a flowmeter is arranged on the exhaust pipe, a plurality of gas inlets are arranged in the height direction of the cavity, the gas inlets are uniformly distributed in the height direction of the cavity, the gas inlets are provided with the valve, the plurality of gas inlets are connected through a first connecting pipe, the first connecting pipe is connected with the gas outlet of the gas tank, the gas tank is provided with a pressure sensor, the gas inlet of the gas tank is provided with a pressure reducing valve, the gas inlet of the gas tank is connected with the gas outlet of the SF6 steel cylinder, the gas outlet of the SF6 steel cylinder is provided with the valve, and the cavity is filled with a filler for delaying the gas flow; the output pressure of the SF6 steel cylinder is more than 0.8Mpa; the filler is one or more of stainless steel powder, copper powder or inorganic ceramic powder.
2. The apparatus for providing a standard source of SF6 gas leakage of electrical equipment of claim 1 wherein the valve on the inlet conduit is a solenoid valve.
3. The apparatus for providing a standard source of SF6 gas leakage for electrical equipment of claim 1 wherein the flow meter mounted on the exhaust is a soap bubble flow meter.
4. The apparatus for providing a standard source of SF6 gas leakage for electrical equipment of claim 1 wherein said air inlet tubes are 6 and said chamber is made of stainless steel.
5. A method of using the apparatus for providing a standard source of SF6 gas leakage for an electrical apparatus of any of claims 1-4, comprising the steps of:
(1) Filling SF6 gas into the SF6 steel cylinder to ensure that the output pressure of the SF6 steel cylinder is more than 0.8Mpa;
(2) Opening a valve on an air outlet of the SF6 steel cylinder to charge the air tank, adjusting a pressure reducing valve, opening a valve on an exhaust pipe, and simultaneously adjusting a valve on an air inlet pipe to ensure that the air tank is kept at constant air pressure;
(3) The gas discharge amount was read out by a flow meter.
6. The method of using the apparatus for providing a standard source of SF6 gas leakage of electrical equipment according to claim 5, wherein the gas pressure in the gas tank in said step (2) is maintained at 0.4MPa to 0.8MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811528457.4A CN109459184B (en) | 2018-12-13 | 2018-12-13 | Device for providing SF6 gas leakage standard source of electrical equipment and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811528457.4A CN109459184B (en) | 2018-12-13 | 2018-12-13 | Device for providing SF6 gas leakage standard source of electrical equipment and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109459184A CN109459184A (en) | 2019-03-12 |
| CN109459184B true CN109459184B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811528457.4A Active CN109459184B (en) | 2018-12-13 | 2018-12-13 | Device for providing SF6 gas leakage standard source of electrical equipment and using method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110107801A (en) * | 2019-04-30 | 2019-08-09 | 国网江苏省电力有限公司常州供电分公司 | The round-the-clock making-up air device of GIS device suitable for the more leak sources of multi-compartment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1183653A (en) * | 1997-09-02 | 1999-03-26 | Saginomiya Seisakusho Inc | Sf6 gas state monitoring device, and method for controlling it |
| CN206194178U (en) * | 2016-08-30 | 2017-05-24 | 抚顺抚运安仪救生装备有限公司 | Leaking stoppage trainer |
| CN209446217U (en) * | 2018-12-13 | 2019-09-27 | 广西电网有限责任公司电力科学研究院 | It is a kind of that the device of electrical equipment SF6 gas leakage standard source is provided |
-
2018
- 2018-12-13 CN CN201811528457.4A patent/CN109459184B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1183653A (en) * | 1997-09-02 | 1999-03-26 | Saginomiya Seisakusho Inc | Sf6 gas state monitoring device, and method for controlling it |
| CN206194178U (en) * | 2016-08-30 | 2017-05-24 | 抚顺抚运安仪救生装备有限公司 | Leaking stoppage trainer |
| CN209446217U (en) * | 2018-12-13 | 2019-09-27 | 广西电网有限责任公司电力科学研究院 | It is a kind of that the device of electrical equipment SF6 gas leakage standard source is provided |
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| CN109459184A (en) | 2019-03-12 |
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