Plateau type gas insulation high-voltage contactor
By adopting the design of filling SF6 gas and pressure relief device in the closed air box in the high-pressure contactor, the problem of reduced insulation performance in high-altitude areas is solved, and a high-voltage contactor with low cost and stable mechanical and electrical performance is realized, suitable for high-altitude, environment.
Patent Information
- Application Number
- CN202420703889.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-08
AI Technical Summary
The insulation performance of existing high-voltage contactors at high altitudes is reduced, resulting in high costs and susceptible to environmental factors, making it difficult to meet the needs of frequent operation and long-life use.
A high-prototype gas insulated high-pressure contactor was designed, using a closed steel plate welded gas box body filled with SF6 gas, and equipped with a pressure relief device and transmission device. The contactor operating mechanism is located outside the air box, and the contactor body is located in the air box. , the high insulation strength and sealing structure of SF6 gas are used to avoid external influences.
It is not necessary to design high-altitude and high-voltage components to meet the operation of high-voltage contactors, reduce costs, ensure the mechanical and electrical performance of the contactors in high-altitude environments, and avoid the influence of factors such as filth, corrosion, and moisture.
Smart Images
Figure CN222168240U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an electrical device, in particular to a plateau type gas-insulated high-voltage contactor. Background Art
[0002] High-voltage contactors are suitable for use in environments such as wind power that require frequent operation and long service life. There are large areas of high altitude areas in my country, and these high altitude areas also have a large demand for electrical equipment. Since the atmospheric pressure in high altitude areas is lower than that in plain areas, the insulation performance of switchgear gradually decreases with the increase of altitude. In the existing design schemes suitable for high altitude environments, high-voltage components suitable for high altitudes are used to improve insulation performance, increase insulation distance and creepage distance, resulting in high costs. At the same time, these design schemes will also be affected by factors such as moisture, corrosion, and dirt in the operating environment, reducing the mechanical and electrical performance of the switchgear. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a low-cost plateau type gas-insulated high-voltage contactor which can meet the operating environment of the contactor in the plateau without using high-voltage components suitable for high altitudes.
[0004] In order to solve the above technical problems, this application provides the following technical solutions:
[0005] The utility model discloses a plateau-type gas-insulated high-voltage contactor, comprising a gas box body, a contactor operating mechanism, a contactor body, and a transmission device. The gas box body is a closed cavity, the gas box body is formed by mutually welding steel plates, the gas box body is filled with SF6 gas, a pressure relief device is arranged on the side wall of the gas box body, the pressure relief device comprises a pressure relief membrane, the pressure relief membrane is made of stainless steel material, the contactor operating mechanism and the contactor body are both connected to the gas box body, the contactor operating mechanism is located outside the gas box body, the contactor body is located inside the gas box body, the transmission device is connected between the contactor operating mechanism and the contactor body, and the contactor operating mechanism controls the contactor body to move through the transmission device.
[0006] Furthermore, the contactor operating mechanism includes a closing coil and an operating mechanism housing, a moving iron core is arranged in the closing coil, the closing coil is arranged in the operating mechanism housing, the contactor body includes a vacuum arc extinguishing chamber, one end of the vacuum arc extinguishing chamber is connected to a static contact and the other end is connected to a moving contact, the moving contact is connected to an insulating pull rod, the transmission device includes a first swing rod, a second swing rod, and a third swing rod, the third swing rod is an L-shaped rod, the middle part of the first swing rod is hinged in the operating mechanism housing, the upper end of the first swing rod is arranged close to the moving iron core, the lower end of the first swing rod is hinged to one end of the second swing rod, the other end of the second swing rod is hinged to one end of the third swing rod, the middle part of the third swing rod is hinged to the gas box body, and the other end of the third swing rod is close to the insulating pull rod, when the closing coil is energized, the moving iron core is attracted, and the moving iron core drives the insulating pull rod to move upward through the first swing rod, the second swing rod, and the third swing rod to close the moving contact of the vacuum arc extinguishing chamber.
[0007] Furthermore, the air box body includes an air box front plate, an air box rear plate, an air box left plate, an air box right plate, an air box upper plate, and an air box lower plate which are connected to each other. The inner sides of the air box front plate, the air box rear plate, the air box left plate, the air box right plate, the air box upper plate, and the air box lower plate are all provided with reinforcing ribs, and the pressure relief device is arranged on the air box lower plate.
[0008] Furthermore, the pressure relief device also includes a pressure relief port, a pressure relief membrane pressure plate, and a sealing ring. The pressure relief port is a through hole opened on the lower plate of the air box, the pressure relief membrane is arranged at the pressure relief port, the sealing ring is arranged between the edge of the pressure relief membrane and the pressure relief port, and the pressure relief membrane pressure plate presses the pressure relief membrane onto the pressure relief port.
[0009] Furthermore, the pressure relief device also includes a plurality of studs, the studs are connected to the lower plate of the air box, the studs are located at the periphery of the pressure relief port, and the pressure relief membrane pressure plate is connected to the studs.
[0010] Furthermore, the pressure relief device also includes a pressure relief membrane support, which is arranged at the pressure relief port, the pressure relief membrane covers the pressure relief membrane support, and the pressure relief membrane pressure plate presses the pressure relief membrane and the pressure relief membrane support.
[0011] Furthermore, the thickness of the pressure relief membrane is greater than 0.46 mm.
[0012] Furthermore, an air pressure indicating device is provided on the air box body.
[0013] Furthermore, the air pressure indicating device is a sealed density meter.
[0014] Compared with the prior art, the plateau-type gas-insulated high-voltage contactor of the utility model has at least the following beneficial effects:
[0015] The utility model discloses a plateau-type gas-insulated high-voltage contactor. Since the gas box body is a closed cavity and is filled with SF6 gas with a certain pressure, the SF6 gas has a high insulation strength and can meet the operating environment of the high-voltage contactor in the plateau without the need to adopt high-voltage components suitable for high altitudes. The gas box body provides a sealed operating space for the high-voltage switch element that is not affected by the external environment. The operation of the contactor in the box is not affected by the plateau, dirt, corrosion, humidity and other factors outside the box, thereby reducing costs. The contactor body is arranged inside the gas box body, and the contactor operating mechanism is designed outside the gas box body, which is convenient for the installation, operation and maintenance of the contactor.
[0016] The plateau type gas insulated high voltage contactor of the utility model will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the main structure of the plateau type gas-insulated high-voltage contactor of the utility model;
[0018] Figure 2 It is a right side structural schematic diagram of the plateau type gas-insulated high-voltage contactor of the utility model;
[0019] Figure 3 It is a bottom view structural schematic diagram of the plateau type gas-insulated high-voltage contactor of the utility model;
[0020] Figure 4 for Figure 1 AA section view;
[0021] Figure 5 It is a left-side structural schematic diagram of the gas box body in the plateau-type gas-insulated high-voltage contactor of the utility model;
[0022] Figure 6 for Figure 5 AA section view;
[0023] Figure 7 for Figure 5 BB section view;
[0024] Figure 8 It is a structural schematic diagram of the pressure relief device in the plateau type gas-insulated high-voltage contactor of the utility model;
[0025] Fig. 9 It is a cross-sectional view of the pressure relief device in the plateau type gas-insulated high-voltage contactor of the utility model. DETAILED DESCRIPTION
[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the utility model is a plateau type gas-insulated high-voltage contactor, including a gas box body 01, a contactor operating mechanism 21, a contactor body 22, and a transmission device 23. The gas box body 01 is a closed cavity, and the gas box body 01 is used to accommodate contactor components. The gas box body 01 is filled with SF6 gas with a certain pressure. The pressure of the SF6 gas is determined according to the specific insulation requirements. A pressure relief device 03 is arranged on the side wall of the gas box body 01. The contactor operating mechanism 21 and the contactor body 22 are both connected to the gas box body 01. The contactor operating mechanism 21 is located outside the gas box body 01, and the contactor body 22 is located inside the gas box body 01. The transmission device 23 is connected between the contactor operating mechanism 21 and the contactor body 22. The contactor operating mechanism 21 controls the contactor body 22 to move through the transmission device 23. There is a dynamic seal between the transmission device 23 and the gas box body 01 in the form of rotation or direct motion. When the utility model plateau type gas-insulated high-voltage contactor is used, the contactor body 22 is operated by the contactor operating mechanism 21. The utility model discloses a plateau-type gas-insulated high-voltage contactor. Since the gas box body 01 is a closed cavity, the gas box body 01 is filled with SF6 gas with a certain pressure. The SF6 gas has a high insulation strength. The gas box body 1 provides a sealed operating space for the high-voltage switch element that is not affected by the external environment. There is no need to specially adopt high-voltage components suitable for high altitudes. The operating environment of the high-voltage contactor in the plateau can be met, thereby reducing costs. The operation of the contactor in the box is not affected by factors such as the plateau, dirt, corrosion, and humidity outside the box. The contactor body 22 is arranged inside the gas box body 01, and the contactor operating mechanism 21 is designed outside the gas box body 01, which is convenient for the installation, operation and maintenance of the contactor.
[0027] Optionally, the contactor operating mechanism 21 includes a closing coil 211 and an operating mechanism housing 212, a moving iron core is arranged in the closing coil 211, the closing coil 211 is arranged in the operating mechanism housing 212, the contactor body 22 includes a vacuum arc extinguishing chamber 221, one end of the vacuum arc extinguishing chamber 221 is connected to a static contact and the other end is connected to a moving contact, the moving contact is connected to an insulating pull rod 222, the transmission device 23 includes a first swing rod 231, a second swing rod 232, and a third swing rod 233, the third swing rod 233 is an L-shaped rod, the middle part of the first swing rod 231 is hinged in the operating mechanism housing 212, the upper end of the first swing rod 231 is arranged close to the moving iron core, the lower end of the first swing rod 231 is hinged to one end of the second swing rod 232, and the other end of the second swing rod 232 is hinged to the third swing rod. One end of the swing arm 233 is hinged, the middle part of the third swing arm 233 is hinged on the gas box body 01, and the other end of the third swing arm 233 is close to the insulating pull rod 222. The second swing arm 232 and the gas box body 01 are dynamically sealed. When closing the circuit breaker, after receiving the closing signal, the closing coil 211 is energized to attract the moving iron core, and the moving iron core drives the insulating pull rod 222 to move upward through the first swing arm 231, the second swing arm 232, and the third swing arm 233 to close the moving contact of the vacuum arc chamber 221, completing the line closing. When opening the circuit breaker, after receiving the opening signal, the electromagnetic force of the power-off coil of the closing coil 211 is released, and after the opening spring is released, the insulating pull rod 222 is driven downward through the dynamic transmission device 23, and finally the moving contact of the vacuum arc chamber 221 is driven downward to complete the line opening.
[0028] Alternatively, if Figure 5 , Figure 6 , Figure 7 As shown, the air box body 01 includes an air box front plate 11, an air box rear plate 12, an air box left plate 13, an air box right plate 14, an air box upper plate 15, and an air box lower plate 16, which are connected to each other. The air box front plate 11, the air box rear plate 12, the air box left plate 13, the air box right plate 14, the air box upper plate 15, and the air box lower plate 16 are all provided with reinforcing ribs on their inner sides, and the pressure relief device 03 is provided on the air box lower plate 16. Specifically, the air box front plate 11, the air box rear plate 12, the air box left plate 13, the air box right plate 14, the air box upper plate 15, and the air box lower plate 16 are all welded together with steel plates, the width of the reinforcing ribs 111 on the air box front plate 11 is equal to the width of the air box front plate 11, and the reinforcing ribs 111 are arranged in sequence and spaced apart along the height direction of the air box front plate 11. Since the side panels of the gas box body 01 are all made of steel plates and each side panel is provided with reinforcing ribs, the structural strength and deformation resistance of the gas box body 01 are improved. When the atmospheric pressure changes in a high-altitude environment and causes the pressure difference between the inside and outside of the gas box body to increase, it can ensure that the deformation of the gas box body is still within the technical requirements and the mechanical properties of the high-voltage components in the gas box body are not affected, so that the switch has the same mechanical and electrical properties in a high-altitude environment as in a plain area.
[0029] Alternatively, if Figure 8 , Fig. 9 As shown, the pressure relief device 03 includes a pressure relief port 31, a pressure relief membrane 32, a pressure relief membrane pressure plate 33, and a sealing ring 34. The pressure relief port 31 is a through hole opened on the air box lower plate 16. The pressure relief membrane 32 is arranged at the pressure relief port 31. The sealing ring 34 is arranged between the edge of the pressure relief membrane 32 and the pressure relief port 31. The pressure relief membrane pressure plate 33 presses the pressure relief membrane 32 against the pressure relief port 31. Through the arrangement of the pressure relief device 03, when the pressure difference between the inside and outside of the air box body increases in the plateau area, the pressure relief membrane can be replaced as needed to meet the requirements after the pressure difference between the inside and outside of the air box body increases, and to avoid gas leakage in the air box body.
[0030] Optionally, the pressure relief device 03 further includes a plurality of studs 35 , which are connected to the air box lower plate 16 , the studs 35 are located at the periphery of the pressure relief port 31 , and the pressure relief membrane pressure plate 33 is connected to the studs 35 .
[0031] Optionally, the pressure relief device 03 further includes a pressure relief membrane support 36, which is disposed at the pressure relief port 31, the pressure relief membrane 32 covers the pressure relief membrane support 36, and the pressure relief membrane pressure plate 33 presses the pressure relief membrane 32 and the pressure relief membrane support 36. The pressure relief membrane support 36 is made of engineering plastic, the pressure relief membrane 32 is made of a stainless steel plate, and the pressure relief membrane pressure plate 33 is made of a metal material. The pressure relief membrane support 36 ensures that the morphological deformation of the pressure relief membrane 32 in the working state is within an allowable range.
[0032] Optionally, the pressure relief membrane 32 is a stainless steel plate with a thickness greater than 0.46 mm, ensuring that the performance of the pressure relief device meets national standards and normal operation and safety margin after changes in external air pressure in high-altitude areas, so that the gas box body can withstand an absolute air pressure of 0.3 MPa, ensuring that the need for a pressure relief device is met in an environment with an altitude of no more than 5000 m, avoiding the pressure difference between the inside and outside of the gas box body due to the increase in altitude, resulting in the pressure valve being unable to release pressure according to the design standard, thereby ensuring the insulation level in the gas box body and the electrical performance of the ring network cabinet.
[0033] Optionally, a gas pressure indicating device is provided on the gas box body 01 to indicate the real-time pressure of the SF6 gas in the gas box body 01 .
[0034] Optionally, the air pressure indicating device is a sealed density meter. The sealed density meter adopts a sealed full-working condition density meter, which is not affected by temperature and altitude. Its internal compensation sheet can realize the temperature compensation function and is not affected by temperature. At the same time, the meter head has a sealed structure. The displayed pressure value is the pressure difference between the pressure inside the air box and the standard atmospheric pressure, which is not affected by altitude and fully meets the operation requirements of high-altitude areas.
[0035] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.
Claims
1. A plateau type gas-insulated high-voltage contactor, characterized in that: The invention comprises a gas box body (01), a contactor operating mechanism (21), a contactor body (22), and a transmission device (23). The gas box body (01) is a closed cavity. The gas box body (01) is formed by welding steel plates together. The gas box body (01) is filled with SF6 gas. A pressure relief device (03) is arranged on the side wall of the gas box body (01). The pressure relief device (03) comprises a pressure relief membrane (32). The pressure relief membrane (32) is made of stainless steel. The mechanism (21) and the contactor body (22) are both connected to the gas box body (01); the contactor operating mechanism (21) is located outside the gas box body (01); the contactor body (22) is located inside the gas box body (01); the transmission device (23) is connected between the contactor operating mechanism (21) and the contactor body (22); the contactor operating mechanism (21) controls the contactor body (22) to move via the transmission device (23).
2. The plateau type gas-insulated high-voltage contactor according to claim 1, characterized in that: The contactor operating mechanism (21) comprises a closing coil (211) and an operating mechanism housing (212); a moving iron core is arranged in the closing coil (211); the closing coil (211) is arranged in the operating mechanism housing (212); the contactor body (22) comprises a vacuum arc extinguishing chamber (221); one end of the vacuum arc extinguishing chamber (221) is connected to a static contact and the other end is connected to a moving contact; the moving contact is connected to an insulating pull rod (222); the transmission device (23) comprises a first swing rod (231), a second swing rod (232), and a third swing rod (233); the third swing rod (233) is an L-shaped rod; the middle part of the first swing rod (231) is hinged in the operating mechanism housing (212); The upper end of the first swing arm (231) is arranged close to the moving iron core, the lower end of the first swing arm (231) is hinged to one end of the second swing arm (232), the other end of the second swing arm (232) is hinged to one end of the third swing arm (233), the middle part of the third swing arm (233) is hinged to the gas box body (01), the other end of the third swing arm (233) is close to the insulating pull rod (222), and the moving iron core is attracted when the closing coil (211) is energized, and the moving iron core drives the insulating pull rod (222) to move upward through the first swing arm (231), the second swing arm (232) and the third swing arm (233) to close the moving contact of the vacuum arc extinguishing chamber (221).
3. The plateau type gas-insulated high-voltage contactor according to claim 1, characterized in that: The air box body (01) comprises an air box front plate (11), an air box rear plate (12), an air box left plate (13), an air box right plate (14), an air box upper plate (15), and an air box lower plate (16) which are connected to each other. The inner sides of the air box front plate (11), the air box rear plate (12), the air box left plate (13), the air box right plate (14), the air box upper plate (15), and the air box lower plate (16) are all provided with reinforcing ribs, and the pressure relief device (03) is arranged on the air box lower plate (16).
4. The plateau type gas-insulated high-voltage contactor according to claim 3, characterized in that: The pressure relief device (03) also includes a pressure relief port (31), a pressure relief membrane pressure plate (33), and a sealing ring (34); the pressure relief port (31) is a through hole opened on the lower plate (16) of the air box; the pressure relief membrane (32) is arranged at the pressure relief port (31); the sealing ring (34) is arranged between the edge of the pressure relief membrane (32) and the pressure relief port (31); the pressure relief membrane pressure plate (33) presses the pressure relief membrane (32) onto the pressure relief port (31).
5. The plateau type gas-insulated high-voltage contactor according to claim 4, characterized in that: The pressure relief device (03) further comprises a plurality of studs (35), wherein the studs (35) are connected to the lower plate (16) of the air box, the studs (35) are located at the periphery of the pressure relief port (31), and the pressure relief membrane pressure plate (33) is connected to the studs (35).
6. The plateau type gas-insulated high-voltage contactor according to claim 5, characterized in that: The pressure relief device (03) further comprises a pressure relief membrane support (36), wherein the pressure relief membrane support (36) is arranged at the pressure relief port (31), the pressure relief membrane (32) covers the pressure relief membrane support (36), and the pressure relief membrane pressure plate (33) presses the pressure relief membrane (32) and the pressure relief membrane support (36).
7. The plateau type gas-insulated high-voltage contactor according to claim 6, characterized in that: The thickness of the pressure relief membrane (32) is greater than 0.46 mm.
8. The plateau type gas-insulated high-voltage contactor according to claim 1, characterized in that: The air box body (01) is provided with an air pressure indicating device.
9. The plateau type gas-insulated high-voltage contactor according to claim 8, characterized in that: The air pressure indicating device is a sealed density meter.