Inflatable environmentally-friendly gas high-voltage switch cabinet with phase control function

Abstract

The application provides a gaseous environmentally-friendly high-voltage switch cabinet with phase control function, and relates to the technical field of high-voltage switch cabinets with phase control function, comprising a cabinet main body and a phase control mechanism, wherein the phase control mechanism is arranged on the inner side of the cabinet main body, and the core thereof comprises a sector gear, a ceramic crankshaft, an inner expansion gas cover, a position control frame, a tension spring rod and a gas pump gas supply module; through single motor cooperation with multiple sets of sector gears and ceramic crankshafts, mechanical time sequence transmission is realized, precise phase control of three-phase power zero-crossing break is realized, a double-layer gas cover is matched to form a ring-shaped conical high-pressure gas curtain, the temperature of the joint terminal separation position is synchronously cooled and arc extinguished, and a temperature sensor is used to monitor the temperature of the key position in real time. The application adopts a full-ceramic insulation corrosion-resistant structure, uses mechanical phase control to replace pure electric control time sequence control, has strong environmental interference resistance and high phase control precision, effectively suppresses operating overvoltage and closing inrush current, improves the speed of heat dissipation and arc extinguishing, avoids electrical component ablation, and has compact equipment structure, stable operation and convenient operation and maintenance.

Description

Technical Field

[0001] This invention relates to the field of phase-controlled high-voltage switchgear technology, specifically to a gas-filled environmentally friendly gas high-voltage switchgear with phase-controlled function. Background Technology

[0002] High-voltage switchgear is a core electrical device in a power system used to receive and distribute electrical energy and control, protect, and monitor circuits. It typically adopts a metal-enclosed cabinet structure and integrates key components such as circuit breakers, disconnect switches, instrument transformers, and busbars. It can be adapted to SF6 or environmentally friendly gas-filled insulation design and can realize circuit closing and opening operations under high-voltage conditions, quickly cut off fault current, and prevent the spread of power grid accidents. It is widely used in power transmission and distribution scenarios such as power plants, substations, industrial plants, and high-rise buildings, and is a key device to ensure the safe and stable operation of the power grid.

[0003] Phase-controlled environmentally friendly gas-insulated high-voltage switchgear often uses environmentally friendly media such as nitrogen and dry air to replace SF6 to meet environmental insulation requirements. Its phase control function is mainly realized by three-phase independent operating mechanisms in conjunction with electronic controllers. The closing and opening operations of each phase are triggered by delay through electrical control signals, thereby adjusting the phase and suppressing operating overvoltage and closing inrush current. The equipment also integrates control, protection and monitoring modules, and can operate reliably at voltage levels of 10kV and above. It is widely used in power transmission and distribution scenarios such as substations and power plants. The whole system takes electrical timing control as the core to achieve precise phase control adjustment and safe and stable operation of the power grid.

[0004] However, existing gas-insulated environmentally friendly gas high-voltage switchgear with phase control function has the following shortcomings: Currently, most gas-insulated environmentally friendly gas high-voltage switchgear with phase control function on the market adopts three-phase independent drive combined with electrical control delay to achieve phase control of opening and closing. Although it has basically achieved phase control function and reduced accidents, it relies on electrical signal timing adjustment, which is easily affected by voltage fluctuations, coil dispersion and environmental interference. The phase control accuracy is insufficient and the consistency is poor. The mechanical response is scattered, making it difficult to achieve stable and reliable timing difference, and the effect of suppressing overvoltage and inrush current is limited. At the same time, the traditional structure lacks active arc intervention means. Arc extinguishing and cooling rely on the diffusion of passive insulation medium. The heat dissipation is slow, the arc extinguishing is delayed, and the arc energy is easy to accumulate continuously, which can easily cause the high-voltage electrical components to burn and be damaged, thus limiting the stability and service life of the equipment. Summary of the Invention

[0005] To address the technical problems of existing phase-controlled high-voltage switchgear, such as reliance on electrical control timing, poor anti-interference, low phase control accuracy, lack of active arc extinguishing protection, and easy ablation of components, this invention provides a gas-filled environmentally friendly gas high-voltage switchgear with phase control function.

[0006] The technical solution provided by the embodiments of the present invention is as follows: a gas-filled environmentally friendly gas high-voltage switchgear with phase control function, comprising: a cabinet body and a phase control mechanism; The phase control mechanism is located inside the cabinet body. The phase control mechanism includes a sector gear, a ceramic crankshaft, an inner air expansion hood, a control frame, a tension spring rod, a ceramic busbar housing, a ceramic load housing, a busbar end, a cable end, a motor, a transmission rod, a driven rod, a damping shaft, a toothed groove, a driven wheel, a ceramic connecting rod, a connecting shaft, a first terminal block, a second terminal block, a temperature sensor, a sliding tube, an outer air expansion hood, a connecting piece, a fixing piece, a first elastic air pipe, a first throttle valve, a main air pipe, a branch air pipe, a second throttle valve, a second elastic air pipe, a pressure relief valve, a first pipe hole, a second pipe hole, and an air pump. The ceramic busbar housing is installed inside the cabinet body, the ceramic load housing is located at the bottom of the ceramic busbar housing, the busbar end is installed inside the ceramic busbar housing, and the cable end is installed inside the ceramic load housing. The motor is installed on the outside of the cabinet body, the transmission rod is connected to the output end of the motor, multiple sector gears are installed on the outside of the transmission rod, and a driven rod is rotatably connected to the inside of the cabinet body; A damping shaft is installed at the other end of the driven rod, and a ceramic crankshaft is installed at the other end of the damping shaft. A toothed groove is opened on the inner side of the ceramic crankshaft, and a driven wheel is installed on the inner side of the toothed groove. A ceramic connecting rod is rotatably connected to the inner side of the ceramic crankshaft, and a connecting shaft is rotatably connected to the other end of the ceramic connecting rod. A second terminal and a first terminal are respectively installed at the upper and lower ends of the connecting shaft. The inner sides of the busbar end and the cable end are provided with second pipe holes, and the inner sides of the ceramic busbar shell and the ceramic load shell are provided with first pipe holes. The inner sides of the first pipe hole and the second pipe hole are slidably connected by a sliding pipe. The inner end of the sliding tube is connected to an outer expansion hood, an inner expansion hood is installed inside the outer expansion hood, and a control frame is installed inside the inner expansion hood. A fixing plate is installed on the outside of the sliding tube. Multiple tension spring rods are installed on one side of the fixing plate. A connecting plate is installed on the other end of the tension spring rods. The connecting plate is fixed to the inside of the cabinet body. The other end of the sliding tube is connected to a first elastic air tube, the top end of the first elastic air tube is connected to a first throttle valve, the top end of the first throttle valve is connected to a main air tube, and the top end of the main air tube passes through the cabinet body and is connected to the air pump. The air pump is installed on the top of the cabinet body. A branch air pipe is connected to the outside of the main air pipe. A second throttle valve is connected to the bottom of the branch air pipe. A second elastic air pipe is connected to the bottom of the second throttle valve. The second elastic air pipe is connected to another set of sliding pipes and air cover assembly. Another set of sliding tubes, outer expansion hoods, inner expansion hoods, and control frames are arranged on the outside of the first wiring terminal, and a pressure relief valve is installed on the outside of the cabinet body.

[0007] The beneficial effects of the technical solution provided by the embodiments of the present invention include at least the following: The present invention uses a single motor to drive multiple sets of sector gear meshing transmission, combined with a ceramic crankshaft and damping shaft to achieve pure mechanical timing phase control, replacing the traditional pure electric control delay method. It is not affected by voltage fluctuations and environmental interference, has high phase control accuracy and good timing consistency, effectively improves mechanical response timing difference, and enhances the suppression of overvoltage and inrush current. It uses ceramic busbar shell, ceramic crankshaft, and ceramic connecting rod as key ceramic components, which have excellent high voltage insulation, gas corrosion resistance, and high temperature aging resistance. It also features a nested inner and outer double-layer gas cover. The ring-shaped high-pressure air curtain can simultaneously cool the disconnected terminal locations and actively extinguish the electric arc, resulting in rapid heat dissipation and arc extinguishing. Temperature sensors monitor the temperature rise of key components in real time, and the throttle valve adaptively adjusts the airflow to achieve zoned and targeted arc extinguishing protection. The tension spring rod and control frame work together to ensure the stability of the air cover structure and buffer vibration. The pressure relief valve automatically maintains the air pressure balance inside the cabinet. The overall structure is modular and integrated with a compact layout, requiring no additional installation space. It is convenient for maintenance and disassembly, significantly reducing the frequency of operation and maintenance, preventing component burn-out caused by electric arc, and improving the overall operational safety and service life of the switchgear. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a perspective view of the main structure of an inflatable environmentally friendly gas high-voltage switchgear with phase control function according to the present invention. Figure 2 This is a three-dimensional, disassembled view of the structure of an inflatable environmentally friendly gas high-voltage switchgear with phase control function according to the present invention. Figure 3 This is a three-dimensional sectional view of the phase control mechanism in a gas-filled environmentally friendly gas high-voltage switchgear with phase control function according to the present invention. Figure 4 This is a partial anatomical view of the phase control mechanism in a gas-filled environmentally friendly gas high-voltage switchgear with phase control function according to the present invention. Figure 5 for Figure 4 Partial structural disassembly 3D diagram; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a rear view of the phase control mechanism in an inflatable environmentally friendly gas high-voltage switchgear with phase control function according to the present invention. Figure 8This is a three-dimensional exploded view of another part of the phase control mechanism in a gas-filled environmentally friendly gas high-voltage switchgear with phase control function according to the present invention. Figure 9 This diagram illustrates the positional relationship between the first terminal block and the outer gas hood in a gas-filled environmentally friendly high-voltage switchgear with phase control function according to the present invention.

[0010] Reference numerals: 1. Cabinet body; 2. Phase control mechanism; 201. Ceramic busbar housing; 202. Ceramic load housing; 203. Busbar end; 204. Cable end; 205. Motor; 206. Transmission rod; 207. Sector gear; 208. Driven rod; 209. Damping shaft; 210. Ceramic crankshaft; 211. Gear groove; 212. Driven wheel; 213. Ceramic connecting rod; 214. Connecting shaft; 215. First terminal; 216. Second terminal; 217. Temperature sensor; 218. Sliding tube; 219. Outer expansion hood; 220. Inner expansion hood; 221. Control frame; 222. Connecting piece; 223. Tension spring rod; 224. Fixing piece; 225. First elastic air tube; 226. First throttle valve; 227. Main air tube; 228. Branch air tube; 229. Second throttle valve; 230. Second elastic air tube; 231. Pressure relief valve; 232. First pipe hole; 233. Second pipe hole; 3. Air pump.

[0011] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0012] The technical solutions of the present invention will now be described with reference to the accompanying drawings. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies. Furthermore, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0013] like Figures 1 to 9 As shown, an embodiment of the present invention provides an inflatable environmentally friendly gas high-voltage switchgear with phase control function, comprising: a cabinet body 1 and a phase control mechanism 2.

[0014] The phase control mechanism 2 is located inside the cabinet body 1. The phase control mechanism 2 includes a sector gear 207, a ceramic crankshaft 210, an inner air vent 220, a control frame 221, a tension spring rod 223, a ceramic busbar housing 201, a ceramic load housing 202, a busbar end 203, a cable end 204, a motor 205, a transmission rod 206, a driven rod 208, a damping shaft 209, a toothed groove 211, a driven wheel 212, and a ceramic connecting rod 2. 13. Connecting shaft 214, first terminal block 215, second terminal block 216, temperature sensor 217, sliding tube 218, external air shroud 219, connecting piece 222, fixing piece 224, first elastic air tube 225, first throttle valve 226, main air tube 227, branch air tube 228, second throttle valve 229, second elastic air tube 230, pressure relief valve 231, first pipe hole 232, second pipe hole 233, and air pump 3.

[0015] The ceramic busbar housing 201 is installed inside the cabinet body 1, the ceramic load housing 202 is located at the bottom of the ceramic busbar housing 201, the busbar end 203 is installed inside the ceramic busbar housing 201, and the cable end 204 is installed inside the ceramic load housing 202. The motor 205 is installed on the outside of the cabinet body 1, the transmission rod 206 is connected to the output end of the motor 205, multiple sector gears 207 are installed on the outside of the transmission rod 206, and the driven rod 208 is rotatably connected to the inside of the cabinet body 1.

[0016] A damping shaft 209 is installed at the other end of the driven rod 208, and a ceramic crankshaft 210 is installed at the other end of the damping shaft 209. A toothed groove 211 is opened on the inner side of the ceramic crankshaft 210, and a driven wheel 212 is installed on the inner side of the toothed groove 211. A ceramic connecting rod 213 is rotatably connected to the inner side of the ceramic crankshaft 210. A connecting shaft 214 is rotatably connected to the other end of the ceramic connecting rod 213. A second terminal 216 and a first terminal 215 are respectively installed at the upper and lower ends of the connecting shaft 214.

[0017] A second pipe hole 233 is provided on the inner side of both the busbar end 203 and the cable end 204. A first pipe hole 232 is provided on the inner side of both the ceramic busbar housing 201 and the ceramic load housing 202. A sliding pipe 218 is slidably connected to the inner side of the first pipe hole 232 and the second pipe hole 233. The inner end of the sliding tube 218 is connected to an outer expansion hood 219, an inner expansion hood 220 is installed inside the outer expansion hood 219, and a control frame 221 is installed inside the inner expansion hood 220.

[0018] A fixing plate 224 is installed on the outside of the sliding tube 218. Multiple tension spring rods 223 are installed on one side of the fixing plate 224. A connecting plate 222 is installed on the other end of the tension spring rod 223. The connecting plate 222 is fixed to the inside of the cabinet body 1. The other end of the sliding tube 218 is connected to the first elastic air tube 225. The top end of the first elastic air tube 225 is connected to the first throttle valve 226. The top end of the first throttle valve 226 is connected to the main air tube 227. The top end of the main air tube 227 passes through the cabinet body 1 and is connected to the air pump 3.

[0019] The air pump 3 is installed on the top of the cabinet body 1. The main air pipe 227 is connected to a branch air pipe 228 on the outside. The bottom of the branch air pipe 228 is connected to a second throttle valve 229. The bottom of the second throttle valve 229 is connected to a second elastic air pipe 230. The second elastic air pipe 230 is connected to another set of sliding pipes 218 and air cover assembly. Another set of sliding tubes 218, outer vent 219, inner vent 220, and control frame 221 are arranged on the outside of the first terminal block 215, and a pressure relief valve 231 is installed on the outside of the cabinet body 1.

[0020] When performing the circuit breaker tripping operation, the starting motor 205 drives the transmission rod 206 to rotate, and the transmission rod 206 drives multiple sector gears 207 to rotate. The multiple sets of sector gears 207 with different orientations mesh with the driven wheel 212 in sequence, and the matching current zero-crossing interval realizes the three-phase power to cross zero sequentially and trip. Driven wheel 212 drives ceramic crankshaft 210 and ceramic connecting rod 213 in a coordinated manner, which in turn pulls first terminal 215 and second terminal 216 to slide and separate smoothly, thus completing precise mechanical phase control.

[0021] The phase-controlled circuit breaker synchronously starts the air pump 3. The environmentally friendly gas is diverted through the main air pipe 227 to the first stoichiometric valve 226 and the second stoichiometric valve 229. It is then sent into the sliding pipe 218 through the elastic air pipe. The outer expansion hood 219 and the inner expansion hood 220 limit the formation of an annular cone-shaped high-pressure air curtain, which is aligned with the terminal separation gap to cool down and blow air to cut off the arc. Temperature sensor 217 collects the housing temperature in real time. In high-temperature areas, the corresponding throttle valve automatically increases the airflow to achieve targeted heat dissipation and arc extinguishing.

[0022] The control frame 221 supports the inner air expansion hood 220 to prevent airflow impact and deformation, and the tension spring rod 223 elastically pulls and resets the sliding tube 218 and buffers the running vibration. When the air pressure inside the cabinet is too high, the pressure relief valve 231 automatically relieves and stabilizes the pressure. The all-ceramic structure improves the overall insulation, temperature resistance and corrosion resistance. The damping shaft 209 buffers the transmission impact, ensuring stable phase control timing and reliable arc extinguishing protection. No manual intervention is required throughout the process, realizing high-precision phase control, active arc extinguishing and adaptive pressure regulation integrated stable operation.

[0023] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0024] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An inflatable environmentally friendly gas high-voltage switchgear with a phase control function, characterized in that, include: Cabinet body and phase control mechanism; The phase control mechanism is located inside the cabinet body. The phase control mechanism includes a sector gear, a ceramic crankshaft, an inner air expansion hood, a control frame, a tension spring rod, a ceramic busbar housing, a ceramic load housing, a busbar end, a cable end, a motor, a transmission rod, a driven rod, a damping shaft, a toothed groove, a driven wheel, a ceramic connecting rod, a connecting shaft, a first terminal block, a second terminal block, a temperature sensor, a sliding tube, an outer air expansion hood, a connecting piece, a fixing piece, a first elastic air pipe, a first throttle valve, a main air pipe, a branch air pipe, a second throttle valve, a second elastic air pipe, a pressure relief valve, a first pipe hole, a second pipe hole, and an air pump. The ceramic busbar housing is installed inside the cabinet body, the ceramic load housing is located at the bottom of the ceramic busbar housing, the busbar end is installed inside the ceramic busbar housing, and the cable end is installed inside the ceramic load housing. The motor is installed on the outside of the cabinet body, the transmission rod is connected to the output end of the motor, multiple sector gears are installed on the outside of the transmission rod, and a driven rod is rotatably connected to the inside of the cabinet body.

2. The environmentally friendly gas high-voltage switch cabinet with phase control function according to claim 1, characterized in that, A damping shaft is installed at the other end of the driven rod, and a ceramic crankshaft is installed at the other end of the damping shaft. A toothed groove is opened on the inner side of the ceramic crankshaft, and a driven wheel is installed on the inner side of the toothed groove. A ceramic connecting rod is rotatably connected to the inner side of the ceramic crankshaft, and a connecting shaft is rotatably connected to the other end of the ceramic connecting rod. A second terminal and a first terminal are respectively installed at the upper and lower ends of the connecting shaft. The inner sides of the busbar end and the cable end are each provided with a second pipe hole, and the inner sides of the ceramic busbar shell and the ceramic load shell are each provided with a first pipe hole. The inner sides of the first pipe hole and the second pipe hole are slidably connected by a sliding pipe.

3. The environmentally friendly gas high-voltage switch cabinet with phase control function according to claim 2, characterized in that, The inner end of the sliding tube is connected to an outer expansion hood, an inner expansion hood is installed inside the outer expansion hood, and a control frame is installed inside the inner expansion hood. A fixing plate is installed on the outside of the sliding tube. Multiple tension spring bars are installed on one side of the fixing plate, and a connecting plate is installed on the other end of the tension spring bars. The connecting plate is fixed to the inside of the cabinet body.

4. The environmentally friendly gas high-voltage switch cabinet with phase control function according to claim 3, characterized in that, The other end of the sliding tube is connected to a first elastic air tube, the top end of the first elastic air tube is connected to a first throttle valve, the top end of the first throttle valve is connected to a main air tube, and the top end of the main air tube passes through the cabinet body and is connected to the air pump. The air pump is installed on the top of the cabinet body. A branch air pipe is connected to the outside of the main air pipe. A second throttle valve is connected to the bottom of the branch air pipe. A second elastic air pipe is connected to the bottom of the second throttle valve. The second elastic air pipe is connected to another set of sliding pipes and air cover assembly.

5. A gas-filled environmentally friendly high-voltage switchgear with phase control function according to claim 4, characterized in that, Another set of sliding tubes, outer vent hoods, inner vent hoods, and control frames are arranged on the outside of the first wiring terminal, and a pressure relief valve is installed on the outside of the cabinet body; The sector gear meshes with the driven gear to drive the ceramic crankshaft to rotate in an orderly and sequential manner.

6. The environmentally friendly gas high-voltage switch cabinet with phase control function according to claim 5, characterized in that, The damping shaft is used to buffer transmission shocks, reduce mechanical action deviations, and improve the timing accuracy of phase-controlled opening and closing.

7. The environmentally friendly gas high-voltage switch cabinet with phase control function according to claim 5, characterized in that, The control frame is used to rigidly support the internal expansion hood to prevent deformation caused by airflow impact, and the tension spring bar is used to provide elastic reset and vibration damping for the sliding tube.

8. The environmentally friendly gas high-voltage switch cabinet with phase control function according to claim 5, characterized in that, The outer and inner air hoods are nested together to limit the airflow and form an annular cone-shaped high-pressure air curtain, thereby achieving cooling, arc extinguishing, and insulation protection at the junction of the terminals.

9. The environmentally friendly gas high-voltage switch cabinet with phase control function according to claim 5, characterized in that, The temperature sensor is used to monitor the temperature of key parts of the ceramic busbar shell and the ceramic load shell in real time, and to adjust the ventilation volume adaptively in conjunction with the throttle valve.

10. A gas-filled environmentally friendly high-voltage switchgear with phase control function according to claim 5, characterized in that, The starter motor drives the transmission rod and multiple sets of sector gears to rotate synchronously, which in turn mesh with the driven wheel to drive the ceramic crankshaft and ceramic connecting rod to move, pulling the first terminal and the second terminal to achieve three-phase sequential zero-crossing phase control tripping; At the same time, the air pump delivers environmentally friendly gas through the main gas pipe and branch gas pipes. After being regulated by the throttle valve, it is sent into the sliding pipe through the elastic gas pipe. The gas is sprayed through the double-layer gas cover to form a protective air curtain for cooling and arc extinguishing. The temperature sensor measures the temperature in real time and adjusts the gas accordingly. When the pressure inside the cabinet is overpressurized, the pressure relief valve automatically releases and stabilizes the pressure. The whole process realizes the integrated operation of mechanical phase control, active arc extinguishing and intelligent pressure regulation.

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