Plateau type generator outlet vacuum circuit breaker

Abstract

The invention belongs to the technical field of power distribution devices, and particularly relates to a plateau type generator outlet vacuum circuit breaker which comprises a contact arm, a plateau type pole, a wireless arc extinguish chamber vacuum degree testing sensor, a mechanical characteristic testing sensor, a vacuum circuit breaker intelligent operating mechanism and an electric shaking chassis truck. The inner side of the plateau type pole adopts a vacuum arc extinguish chamber, and the mechanical characteristic test sensor can comprehensively monitor the mechanical characteristics of the circuit breaker; the intelligent operating mechanism of the vacuum circuit breaker can realize remote control action; according to the invention, the device has the advantages of excellent dimensional stability, high dielectric strength, excellent arc resistance, effective isolation of high voltage and ground potential, compact structure, space saving, reduction of isolation distance required by traditional air insulation, substantial reduction of equipment size, miniaturization and convenient installation.

Description

Technical Field

[0001] The present invention belongs to the technical field of power distribution devices, and in particular relates to a sliding adjustment type busbar structure. Background Art

[0002] As altitude increases, atmospheric pressure and air density decrease, resulting in a decrease in the dielectric strength of the air. The breakdown voltage decreases exponentially with increasing altitude. The air is thinner at high altitudes, reducing heat dissipation capacity and potentially causing equipment to exceed temperature limits. Currently, the most common large-capacity generator outlet circuit breakers at altitudes above 4,000 meters use sulfur hexafluoride (SF6) gas circuit breakers. The low air pressure at high altitudes can exacerbate SF6 leakage, and the equipment is bulky, resulting in high construction investment and long-term operation and maintenance costs.

[0003] The device presented in this invention primarily addresses the need for electrical control and power transmission control equipment for generator sets located at altitudes up to 5,000 meters, where long-term human activity is unsuitable, and where abundant energy sources are available. This vacuum circuit breaker features miniaturization, arc extinguishing capability unaffected by air pressure, maintenance-free operation, a long lifespan, and the ability to operate unattended and remotely monitor the operation. This reduces both initial power plant construction investment and the complexity of subsequent operation and maintenance. Summary of the Invention

[0004] The present invention aims to solve the problem of electrical control and power transmission control equipment used in generator sets in high-altitude environments that are not suitable for long-term human activities, especially at an altitude of 5,000 meters and with abundant power generation energy.

[0005] In order to solve the above technical problems, the present invention provides a plateau-type generator outlet vacuum circuit breaker, including a contact arm, a plateau-type pole, a wireless arc extinguishing chamber vacuum degree test sensor, a mechanical property test sensor, a vacuum circuit breaker intelligent operating mechanism and an electric swing chassis. The contact arm is provided with an embedded temperature sensor, which is in direct contact with the metal of the contact arm, and the temperature sensor can be a wireless temperature sensor; a vacuum arc extinguishing chamber is adopted on the inner side of the plateau-type pole, and the arc extinguishing ability is not affected by air pressure; the wireless arc extinguishing chamber vacuum degree test sensor can capture the characteristic changes of the vacuum circuit breaker in the operating state when the vacuum degree decreases in real time; the mechanical property test sensor performs comprehensive detection of the mechanical properties of the circuit breaker; the vacuum circuit breaker intelligent operating mechanism can realize remote control actions and remotely close and open the circuit breaker; the electric swing chassis can automatically swing the circuit breaker in or out of the cabinet through the electric chassis control module.

[0006] Preferably, the plateau type pole vacuum interrupter adopts copper-chromium alloy contact material, the inner side vacuum interrupter portion of the plateau type pole adopts integrated sealing, and the outer layer adopts epoxy resin flame retardant material.

[0007] Preferably, a buffer assembly is provided between the contact arm and the transmission part that controls its movement, and the buffer assembly can reduce the impact generated when the contact arm contacts the contact, and the buffer assembly includes a connecting seat connected to the contact arm and a buffer seat connected to the transmission part, and an elastic member for buffering is provided between the connecting seat and the buffer seat, and two sets of meshing buffer racks and buffer gears are also provided between the connecting seat and the buffer seat, one end of each buffer rack is connected to the connecting seat, and the other end of the buffer rack is meshed with the buffer gear, the two buffer gears are rotatably connected to the buffer seat and the two buffer gears are meshed with each other, and the two buffer racks are arranged in parallel.

[0008] Preferably, a shell is provided on the outer side of the contact arm, and the shell is provided with a mounting seat protruding outward, the mounting seat passes through the outer side of the contact arm and the shell, a temperature sensor is provided on the inner side of the mounting seat, the temperature sensor is fixed on the inner side of the sensor mounting seat, an end cover is installed on the upper end of the mounting seat, a telescopic assembly is provided between the end cover and the sensor mounting seat, one end of the telescopic assembly is fixed to the end cover, and the other end of the telescopic assembly is hinged to the sensor mounting seat.

[0009] Preferably, a partition is further provided on the inner side of the mounting seat, and the partition is perpendicular to the telescopic assembly. A connecting rod is passed through the partition, one end of the connecting rod is hinged to the sensor mounting seat, and the other end and the middle part of the connecting rod are provided with an adjustment block threadedly connected to it, and the connecting rod can limit the range of swing of the sensor mounting seat relative to the telescopic assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0011] Figure 1 It is a structural schematic diagram of the present invention;

[0012] Figure 2 Schematic diagram of the structure of the buffer assembly in the present invention;

[0013] Figure 3 This is a schematic diagram of the temperature sensor installation in the present invention;

[0014] Figure 4 This is a partial enlarged view of point A of the present invention;

[0015] Figure 5 It is a structural schematic diagram of the telescopic assembly of the present invention;

[0016] In the figure: 1-contact arm, 2-plateau type pole, 3-wireless interrupter vacuum test sensor, 4-mechanical property test sensor, 5-vacuum circuit breaker intelligent operating mechanism, 6-electric swing chassis, 101-connecting seat, 102-buffer seat, 103-buffer rack, 104-buffer gear, 105-housing, 106-mounting seat, 107-end cover, 108-sensor mounting seat, 109-connecting rod, 110-adjusting block, 111-partition, 112-sliding sleeve, 113-sliding rod, 114-telescopic spring; DETAILED DESCRIPTION

[0017] The present invention provides a plateau-type generator outlet vacuum circuit breaker, comprising a contact arm 1, a plateau-type pole 2, a wireless arc extinguishing chamber vacuum degree test sensor 3, a mechanical property test sensor 4, a vacuum circuit breaker intelligent operating mechanism 5, and an electric rocking chassis 6;

[0018] The contact arm 1 is provided with an embedded temperature sensor. The temperature measuring device is installed inside the contact arm. The temperature sensor is in direct contact with the metal of the contact arm, and the collected temperature is more accurate and true. Preferably, the temperature sensor is a wireless temperature sensor. The wireless temperature sensor does not increase the external insulation considerations of the temperature measuring device. It uses non-contact wireless communication technology to wirelessly transmit the measured temperature of the circuit breaker to the background, realizing complete electrical isolation between the receiving unit and the high-voltage side. It can monitor the circuit breaker temperature in real time. When the circuit breaker temperature exceeds the set range, the background receiving unit will alarm and take timely measures to prevent the circuit breaker from burning.

[0019] The plateau-type pole 2 features a vacuum interrupter inside, ensuring arc extinguishing capability unaffected by atmospheric pressure. This makes it particularly suitable for areas at altitudes up to 5,000 meters, eliminating the need to adjust the arc extinguishing design due to low atmospheric pressure. At 5,000 meters above sea level, it meets the one-minute power frequency withstand voltage (RMS): 42kV, and the lightning impulse withstand voltage (peak): 75kV, as specified in the national standard GBT 14824-2021.

[0020] The plateau-type pole 2 vacuum interrupter uses CuCr (copper-chromium alloy) contact material and a longitudinal magnetic field arc extinguishing design. The dielectric recovery speed is fast after interruption, making it suitable for frequent opening and closing scenarios (such as new energy power stations). The mechanical life can reach more than 10,000 times.

[0021] The inner vacuum interrupter of the plateau-type pole 2 uses APG automatic pressure gel sealing integrated technology, and the outer layer is made of epoxy resin flame-retardant material. It has excellent dimensional stability, high dielectric strength and excellent arc resistance, effectively isolating high voltage from ground potential. The compact structure saves space and reduces the isolation distance required for traditional air insulation. The equipment volume is significantly reduced, the equipment is miniaturized, and it is easy to install. In terms of pole structural performance, it has high mechanical strength; in terms of impact resistance, it can withstand short-circuit electric power, wind loads, and seismic loads. The product is not easily damaged during transportation and installation, does not require periodic maintenance or gas replenishment, and has a service life of up to 20-30 years, reducing the complexity of on-site installation and maintenance.

[0022] The wireless arc chamber vacuum test sensor 3 uses non-contact microwave sensing technology, which is sensitive and reliable. It can capture the characteristic changes of the vacuum circuit breaker in real time when the vacuum degree decreases. It will promptly issue an alarm at the early stage of vacuum leakage in the vacuum circuit breaker, reminding the operating personnel to take timely measures and prevent switch explosions caused by vacuum leakage.

[0023] Mechanical characteristic test sensor 4. Vacuum circuit breakers are equipped with sensors to detect the mechanical characteristics of the circuit breaker. For example, linear displacement sensors are commonly used to measure the linear motion of the moving contact of a vacuum circuit breaker. For example, a magnetoresistive linear displacement sensor determines the position of the moving contact by detecting changes in the magnetic field, converting the mechanical displacement into an electrical signal for output. This sensor measures the time it takes for the circuit breaker's contacts to fully open or close after receiving an opening or closing command, and is an important indicator of circuit breaker operating speed. A photoelectric linear displacement sensor utilizes the photoelectric effect, measuring displacement by blocking and conducting light.

[0024] The system adopts sensor technology, signal processing technology, and signal communication technology, and has a higher level of intelligence. Through the mechanical characteristic test sensor 4, it can realize comprehensive detection of the mechanical characteristics of the circuit breaker, such as the closing and opening speed, closing and opening time, overtravel, spring fatigue and other characteristics of the circuit breaker. The data is transmitted to the background through wired data processing and analysis, so as to realize early detection, prevention and early rectification of problems in the operation process.

[0025] The vacuum circuit breaker's intelligent operating mechanism features a modular design. Opening the panel allows direct observation of the operating status of internal components. In the event of a fault, the fault point can be quickly located and the problematic module quickly disassembled and replaced. The mechanism's operating electrical components can be remotely controlled, allowing the circuit breaker to be opened and closed remotely.

[0026] The circuit breaker is equipped with an electric swing chassis 6. The circuit breaker is automatically moved in and out of the cabinet through the electric swing chassis control module at the remote control console. There is no need to go to the equipment site to operate the circuit breaker, thus realizing unattended operation.

[0027] Preferably, a buffer assembly is provided between the contact arm 1 and the transmission part that controls its movement, and the buffer assembly can reduce the impact generated when the contact arm 1 contacts the contact head, see Figure 2 The buffer assembly includes a connecting seat 101 connected to the contact arm 1 and a buffer seat 102 connected to the transmission part. An elastic member for buffering is provided between the connecting seat 101 and the buffer seat 102. Two sets of meshing buffer racks 103 and buffer gears 104 are also provided between the connecting seat 101 and the buffer seat 102. One end of each buffer rack 103 is connected to the connecting seat 101, and the other end of the buffer rack 103 is meshed with the buffer gear 104. The two buffer gears 104 rotate to connect the buffer seat 102 and the two buffer gears 104 are meshed with each other. At the same time, the two buffer racks 103 are arranged in parallel. Through the above structure, the present invention can compress the elastic member and absorb the vibration between the two during the movement of the connecting seat 101 relative to the buffer seat 102, and the buffer rack 103 moves relative to the buffer gear 104, and the buffer gear 104 rotates at the same time; when the contact arm 1 is subjected to an unbalanced force, for example, when the force on the upper side of the contact arm 1 is greater than the force on the lower side, it is easy to cause the contact arm 1 to tilt, and the transmission accuracy of the contact arm 1 cannot be guaranteed. At this time, when the upper side of the contact arm 1 is subjected to a larger force, the upper buffer rack 103 preferably drives the upper buffer gear 104 to rotate, and the upper buffer gear 104 drives the lower buffer gear 104 to rotate, and at the same time, the lower buffer gear 104 drives the lower buffer rack 103 to move, so that the upper and lower buffer racks 103 move in the same direction and at the same time, avoiding the tilt of the contact arm 1 and ensuring the accuracy and reliability of the operation.

[0028] See also Figure 3 and Figure 4 The outer side of the contact arm 1 is provided with a housing 105, and the housing 105 is provided with a mounting base 106 protruding outward. The mounting base 106 passes through the outer sides of the contact arm 1 and the housing 105. A temperature sensor is provided on the inner side of the mounting base 106, and the temperature sensor is fixed on the inner side of the sensor mounting base 108. An end cap 107 is installed on the upper end of the mounting base 106. A telescopic assembly is provided between the end cap 107 and the sensor mounting base 108. One end of the telescopic assembly is fixed to the end cap 107, and the other end of the telescopic assembly is hinged to the sensor mounting base 108. Through the above structure, the present invention hinges the sensor mounting base 108 with the telescopic assembly, so that the sensor mounting base 108 can automatically adjust the angle so that the temperature sensor inside it can better contact the contact arm 1, thereby improving the accuracy of temperature detection.

[0029] Figure 4In the figure, a partition 111 is provided on the inner side of the mounting base 106. The partition 111 is perpendicular to the telescopic assembly and is penetrated by a connecting rod 109. One end of the connecting rod 109 is hingedly connected to the sensor mounting base 108. The other end and the middle of the connecting rod 109 are provided with an adjustment block 110 threadedly connected thereto. The connecting rod 109 limits the range of the sensor mounting base 108's swing relative to the telescopic assembly. The swing range of the sensor mounting base 108 can be adjusted by adjusting the relative distance between the two adjustment blocks 110.

[0030] See also Figure 5 The telescopic assembly includes a sliding sleeve 112 and a sliding rod 113 that can slide relative to each other. The sliding rod 113 is arranged on the inner side of the sliding sleeve 112, and a telescopic spring 114 is installed between the sliding rod 113 and the sliding sleeve 112. When the temperature sensor contacts the contact arm 1, it can act as a buffer for the telescopic spring 114. At the same time, when the telescopic spring 114 is compressed, it can apply pre-pressure to the temperature sensor, ensuring that the temperature sensor and the contact arm are in close contact.

[0031] The present invention adopts a vacuum arc extinguishing chamber in the plateau type pole, and the arc extinguishing ability is not affected by air pressure. It is especially suitable for areas with an altitude of 5,000 meters, and there is no need to adjust the arc extinguishing design due to low air pressure. The vacuum arc extinguishing chamber in the plateau type pole adopts APG automatic pressure gel sealing integrated technology, and the outer layer uses the developed epoxy resin flame retardant material, which has excellent dimensional stability, high dielectric strength and excellent arc resistance. It effectively isolates high voltage from ground potential, has a compact structure, saves space, and reduces the isolation distance required for traditional air insulation. The volume of the equipment is significantly reduced, the equipment is miniaturized, and it is easy to install. In terms of the structural performance of the pole, it has high mechanical strength; by arranging a buffer component between the contact arm and the transmission part that controls its movement, when the contact arm is unevenly stressed, the position of the contact arm is corrected by the buffer component to avoid tilting of the contact arm, thereby ensuring the accuracy and reliability of the operation;

[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A plateau-type generator outlet vacuum circuit breaker, comprising a contact arm, a plateau-type pole, a wireless arc chamber vacuum degree test sensor, a mechanical property test sensor, a vacuum circuit breaker intelligent operating mechanism, and an electric rocking chassis, characterized in that: The contact arm is provided with an embedded temperature sensor, which is in direct contact with the metal of the contact arm and can be a wireless temperature sensor; a vacuum arc extinguishing chamber is used on the inner side of the plateau type pole, and the arc extinguishing ability is not affected by air pressure; the wireless arc extinguishing chamber vacuum degree test sensor can capture in real time the characteristic changes that occur when the vacuum degree of the vacuum circuit breaker in the operating state decreases; the mechanical property test sensor performs comprehensive detection of the mechanical properties of the circuit breaker; the vacuum circuit breaker intelligent operating mechanism can realize remote control actions and remotely close and open the circuit breaker; the electric swing chassis can automatically swing the circuit breaker in or out of the cabinet through the electric chassis control module.

2. A plateau type generator outlet vacuum circuit breaker according to claim 1, characterized in that: The plateau type pole vacuum interrupter adopts copper-chromium alloy contact material, the inner side vacuum interrupter part of the plateau type pole adopts integrated sealing, and the outer layer adopts epoxy resin flame retardant material.

3. The plateau type generator outlet vacuum circuit breaker according to claim 1, characterized in that: A buffer assembly is provided between the contact arm and the transmission part that controls its movement. The buffer assembly can reduce the impact generated when the contact arm contacts the contact. The buffer assembly includes a connecting seat connected to the contact arm and a buffer seat connected to the transmission part. An elastic member for buffering is provided between the connecting seat and the buffer seat. Two sets of meshing buffer racks and buffer gears are also provided between the connecting seat and the buffer seat. One end of each buffer rack is connected to the connecting seat, and the other end of the buffer rack is meshed with the buffer gear. The two buffer gears are rotatably connected to the buffer seat and the two buffer gears are meshed with each other. The two buffer racks are arranged in parallel.

4. The plateau type generator outlet vacuum circuit breaker according to claim 1, characterized in that: A shell is provided on the outside of the contact arm, and the shell is provided with a mounting seat protruding outward. The mounting seat passes through the outside of the contact arm and the shell, and a temperature sensor is provided on the inside of the mounting seat. The temperature sensor is fixed on the inner side of the sensor mounting seat. An end cover is installed on the upper end of the mounting seat, and a telescopic assembly is provided between the end cover and the sensor mounting seat. One end of the telescopic assembly is fixed to the end cover, and the other end of the telescopic assembly is hinged to the sensor mounting seat.

5. A plateau type generator outlet vacuum circuit breaker as claimed in claim 4, characterized in that: A partition is also provided on the inner side of the mounting seat, and the partition is perpendicular to the telescopic assembly. A connecting rod is passed through the partition, and one end of the connecting rod is hinged to the sensor mounting seat. The other end and the middle part of the connecting rod are provided with adjustment blocks threadedly connected to them. The connecting rod can limit the range of swing of the sensor mounting seat relative to the telescopic assembly.

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