Simulation device for simulating gas leakage of sulfur hexafluoride

Abstract

The invention provides a simulation device for simulating gas leakage of sulfur hexafluoride. The simulation device for simulating gas leakage of sulfur hexafluoride comprises a simulation part, the simulation part comprises a first shell, a second shell and a first connecting piece, the first shell is provided with a first area, the second shell is provided with a second area, and the first connecting piece is used for connecting the first area and the second area; the first connecting piece is configured to be capable of adjusting the distance between the first area and the second area so that a leakage channel communicating with the gas cavity can be formed. The gas inlet part is used for introducing gas for detection into the gas chamber; a distance measuring part provided on at least one of the first housing and the second housing, the distance measuring part for detecting a distance between the first region and the second region; and a detection unit for detecting the concentration of the detection gas in the leak path. According to the technical scheme, the problem that the gas leakage rate of sulfur hexafluoride is difficult to quantitatively simulate in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the field of electric power technology, and in particular to a simulation device for simulating gas leakage of sulfur hexafluoride. Background Art

[0002] With the development of power systems and technological advances, high-voltage electrical equipment plays an increasingly important role in power systems. Sulfur hexafluoride (SF6) gas is widely used in power equipment such as high-voltage switchgear, circuit breakers and transformers due to its excellent insulation properties and arc extinguishing ability. Since the leakage of sulfur hexafluoride gas will not only reduce the performance of the equipment and affect the stability of the power grid, but also pose a potential threat to the environment and human health, there is an increasing demand for the detection, control and repair technology of sulfur hexafluoride gas leakage. Therefore, a well-designed device to simulate the gas leakage of sulfur hexafluoride and its discharge characteristics is crucial for the safe and reliable operation of the power system.

[0003] In the prior art, there are certain studies on preventing the gas leakage of sulfur hexafluoride and simulating the gas leakage of sulfur hexafluoride. For example, a Chinese patent with publication number CN 109584665 A discloses a sulfur hexafluoride leakage simulation device and a leak detection training method. A plurality of leak-prone components are arranged on an end face of a shell, and each gas chamber is interconnected with a leak-prone component through a connecting pipe. The simulation of the sulfur hexafluoride leakage state is achieved by replacing a nut with an air outlet in the leak-prone component. A Chinese patent with publication number CN 220248902U discloses a sealed flange connection structure for GIS (Gas Insulated Switchgear) equipment, which uses a first sealing cap screwed on an external hexagonal head and a second sealing cap screwed on a screw rod, and cooperates with a first sealing gasket and a second sealing gasket to form a stable and efficient seal for the external hexagonal bolts and external hexagonal nuts on the flange of the GIS equipment, thereby avoiding air leakage at the external hexagonal bolts and external hexagonal nuts of the flange, preventing air leakage at the flange connection bolts of the GIS equipment, and extending the service life and maintenance cycle of the GIS equipment. A Chinese patent with publication number CN 113586965 B discloses an online inflation device for sulfur hexafluoride mixed gas in a GIS pipeline, which can realize inflation of corresponding component gases after leakage of sulfur hexafluoride mixed gas, ensuring that the concentration of each component gas meets the operating concentration standard during GIS operation; a Chinese patent with publication number CN 118705450 A discloses a GIS equipment sealing flange groove end face texture structure, in which a texture structure is provided on the sealing groove to hinder gas leakage and avoid large-scale leakage of gas inside the equipment. At the same time, it is beneficial to disperse the pressure when the sealing ring contacts the sealing groove, avoiding deformation, hardening or rupture of the local structure of the sealing ring, and extending the service life of the sealing ring.

[0004] In the prior art, although the leakage of sulfur hexafluoride gas can be simulated, it is difficult to quantitatively simulate the leakage amount of sulfur hexafluoride gas, so it is difficult to quantify the leakage amount of sulfur hexafluoride gas. Summary of the invention

[0005] The main purpose of the present invention is to provide a simulation device for simulating the gas leakage of sulfur hexafluoride, so as to solve the problem in the prior art that it is difficult to quantitatively simulate the gas leakage of sulfur hexafluoride.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a simulation device for simulating gas leakage of sulfur hexafluoride. The simulation device for simulating gas leakage of sulfur hexafluoride includes a simulation part, including a first shell, a second shell and a first connecting piece. The first shell and the second shell are used to enclose a gas chamber. The first shell has a first area, and the second shell has a second area. The first connecting piece is used to connect the first area and the second area. The first connecting piece is constructed to be able to adjust the distance between the first area and the second area so as to form a leakage channel connected to the gas chamber; an air inlet part, used to introduce detection gas into the gas chamber; a distance measuring part, which is arranged on at least one of the first shell and the second shell, and the distance measuring part is used to detect the distance between the first area and the second area; and a detection part, which is used to detect the concentration of the detection gas at the leakage channel.

[0007] Furthermore, the distance measuring part includes a distance detecting component, which is arranged on the second shell, and the distance detecting component includes a laser source for emitting laser and a receiving element for receiving laser; a reflective element, which is arranged on the first shell, and the reflective element has a reflective surface for reflecting laser, the reflective surface is arranged toward the laser source, and the laser source and the receiving element are located on the same side of the reflective surface.

[0008] Furthermore, the distance measuring unit further comprises a light shield, which is arranged on the first shell and / or the second shell, and the laser source, the receiving element and the reflecting element are all located inside the light shield.

[0009] Furthermore, there are multiple first areas, and the multiple first areas are arranged at intervals along the circumference of the first shell; there are multiple second areas, and there are multiple first connecting members, and the multiple first areas are arranged correspondingly to the multiple second areas, and the multiple first connecting members are arranged correspondingly to the multiple first areas.

[0010] Furthermore, at least one of the multiple first regions is provided with a convex portion, which is located on the side of the first region facing the second region, and the remaining first regions are provided with a concave portion, which is located on the side of the first region facing the second region.

[0011] Further, the detection part includes: multiple gas sensors, which are arranged corresponding to the multiple first connecting parts; or, the detection part includes: a pump body, which has an inlet and an outlet; a gas detection part, which has a detection chamber and a gas inlet and a gas outlet connected to the detection chamber, and the gas outlet is connected to the inlet of the pump body; a connecting pipeline, one end of the connecting pipeline is connected to the gas inlet, and the other end of the connecting pipeline is selectively connected to any one of the multiple leakage channels.

[0012] Furthermore, the simulation device for simulating the gas leakage of sulfur hexafluoride also includes: a barometer; a ventilation pipeline, one end of the ventilation pipeline extends into the gas chamber, and the other end of the ventilation pipeline is connected to the barometer.

[0013] Further, the second shell includes a main body and an end cover, the main body has a third area, the end cover has a fourth area, the simulation part also includes a second connecting piece, the second connecting piece is used to connect the third area and the fourth area, the second connecting piece is constructed to be able to adjust the distance between the third area and the fourth area so as to form a leakage channel connected to the gas chamber, at least one of the main body and the end cover is provided with a distance measuring part, the distance measuring part is used to detect the distance between the third area and the fourth area, the detection part is constructed to be able to detect the concentration of the detection gas at the leakage channel; and / or, the simulation device for simulating gas leakage of sulfur hexafluoride also includes: a gas source; an air intake line, one end of the air intake line is connected to the gas source, and the other end of the air intake line extends into the gas chamber; an air intake valve, arranged on the air intake line; a pump body, arranged on the air intake line; an exhaust component, including an exhaust line and a first pressure relief valve, one end of the exhaust line extends into the gas chamber, and the other end of the exhaust line is used to exhaust air, and the first pressure relief valve is arranged on the exhaust line.

[0014] Furthermore, the simulation device for simulating the gas leakage of sulfur hexafluoride also includes: a power supply; two insulating supports fixed to the inner wall of the gas chamber; two discharge components, each discharge component including a wire and a discharge terminal, one end of the wire is connected to the power supply, and the other end of the wire extends into the interior of the gas chamber and is connected to the discharge terminal, the two discharge terminals are arranged on the two insulating supports, and the two discharge terminals are arranged at intervals and facing each other.

[0015] Furthermore, the simulation device for simulating gas leakage of sulfur hexafluoride also includes an insulating member disposed between the first shell and the second shell, and the first connecting member passes through the insulating member, the first shell and the second shell.

[0016] By applying the technical solution of the present invention, a detection gas is introduced into a gas chamber through an air inlet, an initial distance between a first area and a second area is measured using a distance measuring part, and the distance between the first area and the second area can be adjusted by loosening the first connecting piece to form a leakage channel. The detection gas in the gas chamber flows out from the leakage channel, and then the distance between the first area and the second area is measured by the distance measuring part to obtain the size of the leakage channel. The detection part can detect the concentration of the leaked detection gas, and the distance data detected by the distance measuring part and the gas concentration data detected by the detection part are synchronously analyzed. Since the size of the leakage channel is related to the leakage rate of the detection gas, the relationship between the leakage channel size and the leakage amount of the detection gas can be inferred by analyzing the change in the concentration of the detection gas at different distances (i.e., different leakage channel sizes). In this way, the leakage amount of the detection gas can be quantitatively simulated, thereby accurately monitoring and quantitatively analyzing the leakage of the detection gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of an embodiment of a simulation device for simulating gas leakage of sulfur hexafluoride according to the present invention is shown;

[0019] Figure 2 Shows Figure 1 A schematic structural diagram of a simulation device for simulating gas leakage of sulfur hexafluoride from one perspective (wherein a convex portion and a concave portion are shown);

[0020] Figure 3 Shows Figure 2 A schematic structural diagram of a simulation device for simulating gas leakage of sulfur hexafluoride (wherein a connecting pipeline, a pump body and a gas detection component are shown).

[0021] The above drawings include the following reference numerals:

[0022] 1. Gas chamber; 4. Gas source; 5. Second pressure relief valve; 6. Air intake pipeline; 7. Power supply; 8. Ammeter; 9. Electrical feed-in device; 201. First shell; 202. Second shell; 203. End cover; 204. Protrusion; 206. Concave portion; 10. Lead wire; 111. Discharge terminal; 12. Fixing member; 121. First fixing member; 122. Second fixing member; 13. Distance detection member; 14. Reflecting member ; 15. Light shield; 151. First cover body; 152. Second cover body; 16. Barometer; 17. Insulator; 18. Insulator support; 19. First pressure relief valve; 21. First connecting piece; 22. O-ring; 23. Ventilation line; 24. Exhaust line; 25. Second connecting piece; 26. Inlet valve; 31. Gas detection piece; 32. Connecting line; 33. Pump body; 40. Inlet part; 50. Distance measuring part. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] like Figure 1 As shown, an embodiment of the present invention provides a simulation device for simulating gas leakage of sulfur hexafluoride. The simulation device for simulating gas leakage of sulfur hexafluoride includes: a simulation part, including a first shell 201, a second shell 202 and a first connecting member 21, the first shell 201 and the second shell 202 are used to enclose a gas chamber 1, the first shell 201 has a first area, the second shell 202 has a second area, the first connecting member 21 is used to connect the first area and the second area, and the first connecting member 21 is configured to be able to adjust the distance between the first area and the second area so as to form a leakage channel connected to the gas chamber 1; an air inlet 40, used to pass the detection gas into the gas chamber 1; a distance measuring part 50, which is arranged on at least one of the first shell 201 and the second shell 202, and the distance measuring part is used to detect the distance between the first area and the second area; a detection part, which is used to detect the concentration of the detection gas at the leakage channel.

[0025] In the above technical solution, the detection gas is introduced into the gas chamber 1 through the air inlet part 40, and the distance measuring part 50 is used to measure the initial distance between the first area and the second area. By loosening the first connecting piece 21, the distance between the first area and the second area can be adjusted to form a leakage channel. The detection gas in the gas chamber 1 flows out from the leakage channel, and then the distance between the first area and the second area is measured by the distance measuring part 50 to obtain the size of the leakage channel. The detection part can detect the concentration of the leaking detection gas, and the distance data detected by the distance measuring part 50 and the gas concentration data detected by the detection part are synchronously analyzed. Since the size of the leakage channel is related to the leakage rate of the detection gas, the relationship between the leakage channel size and the leakage amount of the detection gas can be inferred by analyzing the change in the concentration of the detection gas at different distances (i.e., different leakage channel sizes). In this way, the leakage amount of the detection gas can be quantitatively simulated, thereby accurately monitoring and quantitatively analyzing the leakage of the detection gas.

[0026] Specifically, in an embodiment of the present invention, the detection gas is sulfur hexafluoride (SF6), which is a colorless, odorless and non-toxic gas with good electrical insulation and arc extinguishing properties. Therefore, it is widely used in the power industry, especially in high-voltage electrical equipment, such as gas insulated switchgear (GIS), circuit breakers and transformers.

[0027] Specifically, in the embodiment of the present invention, the distance between the first region and the second region is the distance between an end surface of the second region facing the first region and an end surface of the first region facing the second region.

[0028] Specifically, in the embodiment of the present invention, the first connecting member 21 is a bolt.

[0029] like Figure 1 As shown, in an embodiment of the present invention, the distance measuring unit 50 includes: a distance detecting component 13, which is arranged on the second shell 202, and the distance detecting component 13 includes a laser source for emitting laser and a receiving component for receiving laser; a reflective component 14, which is arranged on the first shell 201, and the reflective component 14 has a reflective surface for reflecting laser, the reflective surface is arranged toward the laser source, and the laser source and the receiving component are located on the same side of the reflective surface.

[0030] In the above technical solution, by loosening the first connecting member 21, the distance between the first area and the second area will change, and the distance between the distance detecting component 13 and the reflector 14 will also change. The laser source in the distance detecting component 13 emits a laser toward the reflector 14, and the laser is irradiated onto the reflective surface of the reflector 14. The receiving component in the distance detecting component 13 can receive the laser reflected back by the reflective surface. In this way, the distance measuring unit 50 can measure the distance between the first area and the second area, so as to quantitatively simulate the leakage amount of the detection gas.

[0031] Specifically, in the embodiment of the present invention, the reflector 14 is a reflector, and the distance detection component 13 is a laser ranging sensor. The laser ranging sensor adopts the principle of frequency modulated continuous wave (Frequency Modulated Continuous Wave, FMCW). According to the needs of high-precision testing, the measurement accuracy is selected to be 1μm and the range is 10mm.

[0032] Specifically, in an embodiment of the present invention, the distance between the first area and the second area can be calculated by the time difference from the laser source emitting the laser to the time it is reflected by the reflective surface and received by the receiving element. Since the speed of light is constant, the total round-trip distance of the laser can be calculated through the time difference, and then the distance between the first shell 201 and the second shell 202 can be deduced. Since the total round-trip distance of the laser is twice the actual distance, when the distance detection component 13 converts the measured time difference into a distance value, it will be divided by 2 and the actual distance between the first shell 201 and the second shell 202 will be calculated.

[0033] In one embodiment, a piezoelectric material may be used to measure the distance between the first region and the second region.

[0034] like Figure 1 As shown, in the embodiment of the present invention, the distance measuring unit 50 further includes a light shield 15 , which is disposed on the first shell 201 and / or the second shell 202 , and the laser source, the receiving element and the reflective element 14 are all located inside the light shield 15 .

[0035] In the above technical solution, by providing the light shield 15, the external light source can be effectively isolated, thereby reducing the interference of the external light source on the distance detection component 13 and the reflector 14, ensuring the purity of the laser signal, and improving the measurement accuracy of the distance detection component 13.

[0036] Furthermore, in the embodiment of the present invention, since the laser emitted by the laser source may cause harm to the human body under certain conditions, the design of the light shield 15 can prevent the laser from leaking into the external environment, thereby avoiding potential harm to the experimental operator.

[0037] Specifically, in an embodiment of the present invention, the light shield 15 includes a first cover body 151 and a second cover body 152, the first cover body 151 is movably arranged relative to the second cover body 152, and the simulation device for simulating the gas leakage of sulfur hexafluoride also includes a fixing component 12, the fixing component 12 includes a first fixing component 121 and a second fixing component 122, the first fixing component 121 is arranged on the first shell 201, and the second fixing component 122 is arranged on the second shell 202, the reflector 14 is fixed on the first fixing component 121, the distance detection component 13 is fixedly connected to the second fixing component 122, and the first cover body 151 and the second cover body 152 are respectively arranged on the first fixing component 121 and the second fixing component 122.

[0038] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, there are multiple first areas, and the multiple first areas are arranged at intervals along the circumference of the first shell 201; there are multiple second areas, and there are multiple first connecting members 21, and the multiple first areas are arranged correspondingly to the multiple second areas, and the multiple first connecting members 21 are arranged correspondingly to the multiple first areas.

[0039] In the above technical solution, by setting multiple first areas, multiple second areas and multiple first connecting parts 21 on the circumference of the first shell 201, the distance between the multiple first areas and the corresponding multiple second areas can be controlled simultaneously or separately, thereby realizing the simulation of multi-point and fixed-point leakage.

[0040] Specifically, in the embodiment of the present invention, by providing a plurality of first connecting members 21 , the experimental operator can selectively adjust the size of any one or more leakage channels according to the experimental requirements, thereby simulating different leakage conditions.

[0041] Specifically, in the embodiment of the present invention, a plurality of first connecting members 21 are disposed corresponding to a plurality of second areas.

[0042] like Figure 1 As shown, in one embodiment, the detection unit includes: a plurality of gas sensors, and the plurality of gas sensors are arranged corresponding to the plurality of first connecting members 21 .

[0043] In the above technical solution, when the detection gas flows out from the leakage channel, the gas sensor can detect the concentration of the leaked detection gas, and synchronously analyze the distance data detected by the distance measurement unit 50 and the gas concentration data detected by the detection unit. Since the size of the leakage channel is related to the leakage rate of the detection gas, the relationship between the leakage channel size and the leakage amount of the detection gas can be calculated by analyzing the changes in the concentration of the detection gas at different distances (i.e., different leakage channel sizes). In this way, the leakage amount of the detection gas can be quantitatively simulated, thereby accurately monitoring and quantitatively analyzing the leakage of the detection gas; and by setting up multiple gas sensors, multi-point and fixed-point leakage simulations can be performed on multiple leakage channels.

[0044] Specifically, in the embodiment of the present invention, the gas sensor is a sulfur hexafluoride sensor. The specific structure of the sulfur hexafluoride sensor can refer to the prior art and will not be described in detail here.

[0045] In another embodiment, Figure 3 As shown, the detection part includes: a pump body 33, the pump body 33 has an inlet and an outlet; a gas detection component 31, having a detection chamber and a gas inlet and a gas outlet connected to the detection chamber, and the gas outlet is connected to the inlet of the pump body 33; a connecting pipe 32, one end of the connecting pipe 32 is connected to the gas inlet, and the other end of the connecting pipe 32 is selectively connected to any one of the multiple leakage channels.

[0046] In the above technical scheme, when it is necessary to perform quantitative detection on the detection gas of one of the leakage channels, the connecting pipe 32 is moved to the leakage channel that needs to be detected, and the leaked detection gas flows into the gas detection component 31 through the connecting pipe 32. The detection chamber of the gas detection component 31 can detect the concentration of the leaked detection gas. The distance data detected by the distance measuring unit 50 and the gas concentration data detected by the gas detection component 31 are synchronously analyzed, and the relationship between the leakage channel size and the leakage amount of the detection gas can be calculated. In this way, the leakage amount of the detection gas can be quantitatively simulated, so as to accurately monitor and quantitatively analyze the leakage of the detection gas. Under the action of the pump body 33, the detection gas is discharged from the detection unit through the outlet.

[0047] Specifically, in the embodiment of the present invention, the pump body 33 is a vacuum pump, and the gas detection element 31 is an ion mobility spectrometer. The specific structure of the ion mobility spectrometer can refer to the prior art and will not be described in detail here.

[0048] Specifically, in the embodiment of the present invention, the simulation device for simulating gas leakage of sulfur hexafluoride further includes a recovery part, which is connected to the outlet of the pump body 33, and the detection gas enters the recovery part through the outlet for recovery.

[0049] Specifically, in the embodiment of the present invention, since there are multiple first regions and multiple second regions, there are also multiple leakage channels, and the multiple leakage channels are provided corresponding to the multiple first regions.

[0050] like Figure 2 As shown, in an embodiment of the present invention, at least one of the multiple first regions is provided with a convex portion 204, and the convex portion 204 is located on the side of the first region facing the second region, and the remaining first regions of the multiple first regions are provided with a concave portion 206, and the concave portion 206 is located on the side of the first region facing the second region.

[0051] In the above technical solution, by providing the convex portion 204 and the concave portion 206, the convex portion 204 can simulate the convex defect on the first area, and the concave portion 206 can simulate the concave defect on the first area, so that the influence of different defects on the leakage of the detection gas can be simulated.

[0052] Specifically, in an embodiment of the present invention, the simulation device for simulating gas leakage of sulfur hexafluoride also includes an O-ring 22. Along the radial direction of the first shell 201, the O-ring 22 is located on the inner side of the protrusion 204 and / or the recessed portion 206. The O-ring 22 can increase the airtightness between the first shell 201 and the second shell 202.

[0053] Specifically, in the embodiment of the present invention, the convex portion 204 and the concave portion 206 can simulate the influence of leakage of the detection gas when the first housing 201 is aged.

[0054] Specifically, in an embodiment of the present invention, there are N first regions in total, one of the multiple first regions is provided with a convex portion 204, and the remaining N-1 first regions are provided with concave portions 206. Alternatively, all first regions may be provided with convex portions 204, or all first regions may be provided with concave portions 206.

[0055] Specifically, in an embodiment of the present invention, by loosening the first connecting piece 21 corresponding to the convex portion 204, or loosening the first connecting piece 21 corresponding to the concave portion 206, the distance between the first area and the second area can be adjusted to form a leakage channel, and the detection gas in the gas chamber 1 flows out from the leakage channel, and the distance measuring unit 50 can measure the distance between the first area and the second area, and the detection unit can detect the concentration of the leaked detection gas. The distance data detected by the distance measuring unit 50 and the gas concentration data detected by the detection unit are synchronously analyzed, and the leakage amount of the detection gas at the convex portion 204 or the concave portion 206 can be quantitatively simulated, thereby accurately monitoring and quantitatively analyzing the leakage of the detection gas.

[0056] like Figure 1As shown, in an embodiment of the present invention, the simulation device for simulating gas leakage of sulfur hexafluoride also includes a barometer 16; a ventilation pipeline 23, one end of the ventilation pipeline 23 extends into the gas chamber 1, and the other end of the ventilation pipeline 23 is connected to the barometer 16.

[0057] In the above technical solution, the barometer 16 is connected to the interior of the gas chamber 1 through the ventilation pipe 23. The change in the reading of the barometer 16 can reflect the leakage degree of the detection gas in the gas chamber 1. By detecting the change in air pressure in the gas chamber 1 before and after the leakage, the experimental operator can calculate the volume of the leaked detection gas, thereby accurately monitoring and quantitatively analyzing the leakage of the detection gas.

[0058] Specifically, in the embodiment of the present invention, the barometer 16 can be applied to the scenario where the leakage of the detection gas is relatively large.

[0059] like Figure 1 As shown, in an embodiment of the present invention, the second shell 202 includes a main body and an end cover 203, the main body has a third area, the end cover 203 has a fourth area, the simulation part also includes a second connecting member 25, the second connecting member 25 is used to connect the third area and the fourth area, the second connecting member 25 is constructed to be able to adjust the distance between the third area and the fourth area so as to form a leakage channel connected to the gas chamber 1, at least one of the main body and the end cover 203 is provided with a distance measuring part 50, the distance measuring part 50 is used to detect the distance between the third area and the fourth area, and the detection part is constructed to be able to detect the concentration of the detection gas at the leakage channel.

[0060] In the above technical solution, the distance measuring unit 50 is used to measure the initial distance between the third area and the fourth area. By loosening the second connecting piece 25, the distance between the third area and the fourth area can be adjusted to form a leakage channel. The detection gas in the gas chamber 1 flows out from the leakage channel, and then the distance between the first area and the second area is measured by the distance measuring unit 50 to obtain the size of the leakage channel. The detection unit can detect the concentration of the leaked detection gas, and the distance data detected by the distance measuring unit 50 and the gas concentration data detected by the detection unit are synchronously analyzed. Since the size of the leakage channel is related to the leakage rate of the detection gas, the relationship between the leakage channel size and the leakage amount of the detection gas can be inferred by analyzing the changes in the concentration of the detection gas at different distances (i.e., different leakage channel sizes). In this way, the leakage amount of the detection gas can be quantitatively simulated, thereby accurately monitoring and quantitatively analyzing the leakage of the detection gas.

[0061] Specifically, in the embodiment of the present invention, the second connecting member 25 is a bolt.

[0062] Specifically, in the embodiment of the present invention, the distance between the third region and the fourth region is the distance between an end surface of the fourth region facing the third region and an end surface of the third region facing the fourth region.

[0063] Specifically, in an embodiment of the present invention, the detection unit may include multiple gas sensors, and the multiple gas sensors are arranged corresponding to the multiple second connecting parts 25, so that the concentration of the detection gas for leakage can be detected; the detection unit may also include a pump body 33, a gas detection component 31 and a connecting pipe 32, the pump body 33 has an inlet and an outlet, the gas detection component 31 has a detection chamber and a gas inlet connected to the detection chamber, one end of the connecting pipe 32 is connected to the gas inlet, the detection chamber is connected to the inlet, the outlet of the pump body 33 is used to discharge the detection gas, and the connecting pipe 32 can be selectively connected to any one of the multiple leakage channels between the main body and the end cover 203, so that the concentration of the leakage detection gas can be detected.

[0064] Specifically, in an embodiment of the present invention, there are multiple third regions, and the multiple third regions are arranged at intervals along the circumference of the second shell 202; there are multiple fourth regions, and there are multiple second connecting members 25, and the multiple third regions are arranged correspondingly to the multiple fourth regions, and the multiple second connecting members 25 are arranged correspondingly to the multiple third regions.

[0065] Through the above-mentioned arrangement, by providing a plurality of second connecting members 25 , the experimental operator can selectively adjust the size of any one or more leakage channels according to the experimental requirements, thereby simulating different leakage conditions.

[0066] Specifically, in the embodiment of the present invention, the plurality of second connecting members 25 are disposed corresponding to the plurality of fourth regions.

[0067] like Figure 1 As shown, in an embodiment of the present invention, the simulation device for simulating the gas leakage of sulfur hexafluoride also includes a gas source 4; an air intake pipeline 6, one end of which is connected to the gas source 4, and the other end of the air intake pipeline 6 extends into the gas chamber 1; an air intake valve 26, which is arranged on the air intake pipeline 6; a pump body, which is arranged on the air intake pipeline 6; an exhaust component, including an exhaust pipeline 24 and a first pressure relief valve 19, one end of the exhaust pipeline 24 extends into the gas chamber 1, and the other end of the exhaust pipeline 24 is used to exhaust air, and the first pressure relief valve 19 is arranged on the exhaust pipeline 24.

[0068] In the above technical solution, the air inlet valve 26 is opened, and the gas in the air source 4 is passed into the gas chamber 1 through the air inlet pipe 6 under the action of the pump body, so that the gas chamber 1 is filled with gas and maintained at a certain air pressure. The first pressure relief valve 19 is opened, and the original air in the gas chamber 1 is discharged through the exhaust pipe 24.

[0069] Specifically, in the embodiment of the present invention, the gas source 4 is a high-pressure gas cylinder, and the gas in the high-pressure gas cylinder is sulfur hexafluoride.

[0070] Specifically, in an embodiment of the present invention, the simulation device for simulating gas leakage of sulfur hexafluoride also includes a second pressure relief valve 5, which is arranged on the intake pipe 6. The specific structure of the first pressure relief valve 19 and the second pressure relief valve 5 can refer to the prior art and will not be repeated here.

[0071] Specifically, in an embodiment of the present invention, the end cover 203 is closed, the first shell 201 and the second shell 202 are locked by the first connecting piece 21 to keep the gas chamber 1 sealed, the gas source 4 and the second pressure relief valve 5 are opened, and the gas chamber 1 is inflated to a certain air pressure, and then the first pressure relief valve 19 is opened to discharge and recycle the air, and the gas source 4 and the second pressure relief valve 5 are reopened, and the above actions are repeated multiple times to fully discharge the residual air in the gas chamber 1, and the air pressure in the gas chamber 1 is maintained at a specific value between 0.5 and 1.2 MPa as needed.

[0072] The decomposition products of sulfur hexafluoride produced during the arc discharge process, such as hydrogen sulfide and sulfur dioxide, will not only cause harm to the environment and high-voltage switchgear, but also damage the health of equipment maintenance personnel. Therefore, simulating the leakage of discharge characteristic products will help to deeply understand the behavior of sulfur hexafluoride during the arc discharge process, provide a scientific basis for improving equipment design, evaluate the potential impact of sulfur hexafluoride gas discharge on the environment, and provide data support for environmental protection and equipment stable operation measures. However, in the prior art, there are few studies on simulating the leakage of decomposition products produced by sulfur hexafluoride during the discharge process. Therefore, it is difficult to evaluate the impact of leakage on the decomposition products of sulfur hexafluoride during the discharge process.

[0073] Therefore, if Figure 1 As shown, in an embodiment of the present invention, the simulation device for simulating gas leakage of sulfur hexafluoride also includes: a power supply 7; two insulating supports 18, fixed to the inner wall of the gas chamber 1; two discharge components, each discharge component includes a wire 10 and a discharge terminal 111, one end of the wire 10 is connected to the power supply 7, and the other end of the wire 10 extends into the interior of the gas chamber 1 and is connected to the discharge terminal 111, and the two discharge terminals 111 are arranged on the two insulating supports 18, and the two discharge terminals 111 are arranged at intervals and facing each other.

[0074] In the above technical solution, the power supply 7 is started, and the high voltage current is transmitted to the two discharge terminals 111 through the two wires 10. An electric field is formed between the two discharge terminals 111. The detection gas in the gas chamber 1 is decomposed under the action of the electric field and forms a series of discharge characteristic products. By loosening the first connecting piece 21, the distance between the first area and the second area can be adjusted to form a leakage channel. The connecting pipe 32 is moved to the leakage channel, and the leaked discharge characteristic products flow into the gas detection component 31 through the connecting pipe 32. The detection chamber of the gas detection component 31 can detect and analyze the concentration of the leaked discharge characteristic products. In this way, the leakage of the discharge characteristic products in the gas chamber 1 can be simulated.

[0075] Specifically, in the embodiment of the present invention, the discharge terminal 111 is a tungsten needle.

[0076] Specifically, in the embodiment of the present invention, the power supply 7 can output a high voltage with a simulated voltage range of 2 kV to 800 kV, which is used to simulate the glow discharge state and the arc discharge state.

[0077] Specifically, in the embodiment of the present invention, the function of the insulating support member 18 is to prevent the discharge terminal 111 from forming a short circuit with the inner wall of the gas chamber 1 , while providing necessary mechanical support to maintain the precise position of the discharge terminal 111 .

[0078] Specifically, in an embodiment of the present invention, an electrical feed-in device 9 is provided on the first shell 201, and two wires 10 penetrate into the interior of the gas chamber 1 through the electrical feed-in device 9. Since the air pressure in the gas chamber 1 is different from the air pressure outside the simulation device for simulating gas leakage of sulfur hexafluoride, the electrical feed-in device 9 can realize electrical connection between the two, thereby avoiding the phenomenon of destroying the air pressure difference.

[0079] Specifically, in the embodiment of the present invention, an ammeter 8 is provided on the conductor 10 , and the ammeter 8 can monitor the current generated when high voltage is applied between the two discharge terminals 111 .

[0080] Specifically, in the embodiment of the present invention, the influence of different gas pressures and different voltages in the gas chamber 1 on the discharge characteristic products of the detection gas can also be simulated. The detection gas is filled into the gas chamber 1 to a gas pressure of 0.6MPa, and maintained for a period of time to confirm that the air tightness of the simulation device for simulating the gas leakage of sulfur hexafluoride is good. The output voltage range of the power supply 7 is 2kV to 800kV, which can be a DC high voltage or an AC high voltage. The spacing between the two discharge terminals 111 is set to 20mm, and the voltage of the high-voltage power supply 7 is gradually increased from 2kV to observe the process from corona discharge to arc discharge. Select a stable discharge state, maintain continuous discharge for 24 hours to accumulate enough discharge characteristic product gas, and record the change law of the current meter 8 during the discharge. Gradually loosen the first connecting piece 21 to simulate the leakage of sulfur hexafluoride and the discharge characteristic product. The leaked gas is drawn into the gas detection part 31 and the concentrations of sulfur hexafluoride and the discharge characteristic products sulfur dioxide, hydrogen sulfide and sulfuryl fluoride are quantitatively analyzed. The gas chamber 1 is refilled with sulfur hexafluoride gas to a pressure of 0.3 MPa, and the above simulation process is repeated. The effects of different gas pressures on the characteristic product gas of sulfur hexafluoride discharge are recorded and analyzed.

[0081] Specifically, in an embodiment of the present invention, the gas chamber 1 is a GIS (Gas Insulated Switchgear) high-voltage gas chamber. The gas chamber 1 uses sulfur hexafluoride (SF6) gas as an insulating medium. Sulfur hexafluoride can safely isolate and control high-voltage electricity in a smaller space with its excellent insulation properties and efficient arc extinguishing ability. The gas chamber 1 is a closed cavity that can withstand a gas pressure of 0.5 to 1.2 MPa, and the gas in the cavity can flow freely.

[0082] like Figure 1 As shown, in an embodiment of the present invention, the simulation device for simulating gas leakage of sulfur hexafluoride also includes an insulating member 17 disposed between the first shell 201 and the second shell 202 , and a first connecting member 21 is disposed through the insulating member 17 , the first shell 201 and the second shell 202 .

[0083] Through the above settings, different situations of detection gas leakage can be simulated.

[0084] Specifically, in an embodiment of the present invention, the first connecting member 21 is passed through the insulating member 17, the first shell 201 and the second shell 202, and the second connecting member 25 is passed through the second shell 202 and the end cover 203. There are two possible leakage situations in the simulation device for simulating the gas leakage of sulfur hexafluoride.

[0085] Specifically, in the embodiment of the present invention, the insulating member 17 is a pot-type insulator, and a through hole is provided on the pot-type insulator. The wire 10 passes through the through hole and is fixed on the insulating support member 18 .

[0086] Specifically, in the embodiment of the present invention, the leakage of the detection gas is quantitatively simulated by the compression degree of different positions such as the first shell 201, the second shell 202 and the end cover 203. By setting multiple first areas in the circumferential direction of the first shell 201, the distance between the multiple first areas and the corresponding multiple second areas can be controlled simultaneously or separately, thereby realizing the simulation of multi-point and fixed-point leakage, and the leakage effect caused by different defects is simulated by the structural design of the convex part 204 and the concave part 206. In addition, by adding a discharge structure to the simulation device for simulating the gas leakage of sulfur hexafluoride, the influence of the leakage of the detection gas in the gas chamber 1 on the discharge characteristic product can be evaluated.

[0087] Specifically, in an embodiment of the present invention, by simulating the leakage of sulfur hexafluoride gas, the performance of a simulation device for simulating the leakage of sulfur hexafluoride gas under different leakage conditions can be evaluated, thereby ensuring the reliability and safety of the simulation device for simulating the leakage of sulfur hexafluoride gas, and at the same time contributing to the development of effective leakage detection and repair technology, thereby reducing the impact of sulfur hexafluoride gas on the environment and health.

[0088] Specifically, in an embodiment of the present invention, the distance measuring unit 50 and the detection unit are used to evaluate the tightness between the first area and the second area, and the third area and the fourth area, so as to achieve a leap from the traditional simulation of whether sulfur hexafluoride leaks to the quantitative simulation; by setting the convex portion 204 and the concave portion 206, and coordinating the tightness of the first area and the second area, and the third area and the fourth area, the leakage level evaluation at different positions in the gas chamber 1 is achieved; the discharge structure is combined with a simulation device for simulating gas leakage of sulfur hexafluoride, and the discharge state, discharge gas product, and gas pressure state (sulfur hexafluoride leakage degree) are linked to comprehensively simulate and evaluate multiple performance indicators in the gas chamber 1.

[0089] Specifically, in the embodiment of the present invention, the leakage rate of sulfur hexafluoride under different pressure conditions can be evaluated by monitoring with the barometer 16 .

[0090] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the detection gas is introduced into the gas chamber through the air inlet part, the initial distance between the first area and the second area is measured by the distance measuring part, and the distance between the first area and the second area can be adjusted by loosening the first connecting piece to form a leakage channel. The detection gas in the gas chamber flows out from the leakage channel, and then the distance between the first area and the second area is measured by the distance measuring part to obtain the size of the leakage channel. The detection part can detect the concentration of the leaked detection gas, and the distance data detected by the distance measuring part and the gas concentration data detected by the detection part are synchronously analyzed. Since the size of the leakage channel is related to the leakage rate of the detection gas, the relationship between the leakage channel size and the leakage amount of the detection gas can be inferred by analyzing the change in the concentration of the detection gas at different distances (i.e., different leakage channel sizes). In this way, the leakage amount of the detection gas can be quantitatively simulated, thereby accurately monitoring and quantitatively analyzing the leakage of the detection gas.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A simulation device for simulating gas leakage of sulfur hexafluoride, characterized in that: include: A simulation part, comprising a first shell (201), a second shell (202) and a first connecting member (21), wherein the first shell (201) and the second shell (202) are used to enclose a gas chamber (1), the first shell (201) has a first area, the second shell (202) has a second area, the first connecting member (21) is used to connect the first area and the second area, and the first connecting member (21) is configured to be able to adjust the distance between the first area and the second area so as to form a leakage channel communicating with the gas chamber (1); An air inlet (40) for introducing a detection gas into the gas chamber (1); a distance measuring unit (50), arranged on at least one of the first housing (201) and the second housing (202), the distance measuring unit being used to detect the distance between the first area and the second area; The detection unit is used to detect the concentration of the detection gas at the leakage channel.

2. The simulation device for simulating gas leakage of sulfur hexafluoride according to claim 1, characterized in that: The distance measuring unit (50) comprises: A distance detection component (13) is arranged on the second housing (202), and the distance detection component (13) comprises a laser source for emitting laser light and a receiving element for receiving laser light; A reflector (14) is arranged on the first shell (201), the reflector (14) having a reflective surface for reflecting laser light, the reflective surface being arranged toward the laser source, and the laser source and the receiving element being located on the same side of the reflective surface.

3. The simulation device for simulating gas leakage of sulfur hexafluoride according to claim 2, characterized in that: The distance measuring unit (50) further comprises a light shield (15), wherein the light shield (15) is arranged on the first shell (201) and / or the second shell (202), and the laser source, the receiving element and the reflective element (14) are all located inside the light shield (15).

4. The simulation device for simulating gas leakage of sulfur hexafluoride according to claim 1, characterized in that: There are multiple first regions, and the multiple first regions are arranged at intervals along the circumference of the first shell (201); there are multiple second regions, and there are multiple first connecting members (21), and the multiple first regions are arranged correspondingly to the multiple second regions, and the multiple first connecting members (21) are arranged correspondingly to the multiple first regions.

5. The simulation device for simulating gas leakage of sulfur hexafluoride according to claim 4, characterized in that: At least one of the plurality of first regions is provided with a convex portion (204), and the convex portion (204) is located on a side of the first region facing the second region, and the remaining first regions of the plurality of first regions are provided with a concave portion (206), and the concave portion (206) is located on a side of the first region facing the second region.

6. The simulation device for simulating gas leakage of sulfur hexafluoride according to claim 4, characterized in that: The detection unit comprises: a plurality of gas sensors, wherein the plurality of gas sensors are arranged corresponding to the plurality of first connecting members (21); or, The detection unit comprises: A pump body (33), wherein the pump body (33) has an inlet and an outlet; A gas detection element (31) having a detection chamber and a gas inlet and a gas outlet communicated with the detection chamber, wherein the gas outlet is communicated with the inlet of the pump body (33); A connecting pipe (32), one end of which is connected to the gas inlet, and the other end of which is selectively connected to any one of the leakage channels.

7. The simulation device for simulating gas leakage of sulfur hexafluoride according to claim 1, characterized in that: The simulation device for simulating gas leakage of sulfur hexafluoride also includes: Barometer (16); A ventilation pipeline (23), one end of which extends into the gas chamber (1), and the other end of which is connected to the barometer (16).

8. The simulation device for simulating gas leakage of sulfur hexafluoride according to any one of claims 1 to 7, characterized in that: The second shell (202) comprises a main body and an end cover (203), the main body having a third area, the end cover (203) having a fourth area, the simulation part further comprising a second connecting member (25), the second connecting member (25) being used to connect the third area and the fourth area, the second connecting member (25) being configured to be able to adjust the distance between the third area and the fourth area so as to form a leakage channel communicating with the gas chamber (1), at least one of the main body and the end cover (203) being provided with the distance measuring unit (50), the distance measuring unit (50) being used to detect the distance between the third area and the fourth area, the detection unit being configured to be able to detect the concentration of the detection gas at the leakage channel; and / or, The simulation device for simulating gas leakage of sulfur hexafluoride also includes: Gas source (4); An air intake pipeline (6), one end of the air intake pipeline (6) being in communication with the air source (4), and the other end of the air intake pipeline (6) extending into the gas chamber (1); An air intake valve (26) is arranged on the air intake pipeline (6); A pump body, arranged on the air intake pipeline (6); An exhaust component comprises an exhaust pipeline (24) and a first pressure relief valve (19), wherein one end of the exhaust pipeline (24) extends into the gas chamber (1), and the other end of the exhaust pipeline (24) is used to exhaust air, and the first pressure relief valve (19) is arranged on the exhaust pipeline (24).

9. The simulation device for simulating gas leakage of sulfur hexafluoride according to any one of claims 1 to 7, characterized in that: The simulation device for simulating gas leakage of sulfur hexafluoride also includes: Power supply (7); Two insulating support members (18) fixed to the inner wall of the gas chamber (1); Two discharge components, each of the discharge components comprises a wire (10) and a discharge terminal (111), one end of the wire (10) is connected to the power source (7), the other end of the wire (10) extends into the interior of the gas chamber (1) and is connected to the discharge terminal (111), the two discharge terminals (111) are arranged on the two insulating support members (18), and the two discharge terminals (111) are arranged at intervals and facing each other.

10. The simulation device for simulating gas leakage of sulfur hexafluoride according to any one of claims 1 to 7, characterized in that: The simulation device for simulating gas leakage of sulfur hexafluoride further comprises an insulating member (17) arranged between the first shell (201) and the second shell (202), and the first connecting member (21) passes through the insulating member (17), the first shell (201) and the second shell (202).

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