Pole-mounted vacuum circuit breaker with integrated sensor

Abstract

The invention relates to the technical field of vacuum circuit breakers, in particular to a pole-mounted vacuum circuit breaker with an integrated sensor, which comprises a body, an insulating pole and a sensor group are arranged in the body, and a vacuum tube for controlling the on-off of a circuit is arranged in the insulating pole; the sensor group comprises a voltage transformer, a current transformer, a voltage sensor, a current sensor and a voltage sensor, the voltage transformer is used for converting high voltage into low voltage and inputting the low voltage into the voltage sensor, and the current transformer is used for converting large current into standard small current and inputting the standard small current into the current sensor; the voltage sensor and the current sensor are both electrically connected with the insulation column, the vacuum tube is controlled to disconnect the circuit when the voltage sensor detects that the voltage exceeds a set value, and the vacuum tube is controlled to disconnect the circuit when the current sensor detects that the current exceeds a set value. The complexity of the structure can be reduced, so that the convenience of installation and maintenance is improved, and the coordination of cooperation of all parts is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum circuit breakers, and in particular to a pole-mounted vacuum circuit breaker with an integrated sensor. Background Art

[0002] Traditional pole-mounted vacuum circuit breakers typically rely on simple electrical connections to achieve basic on / off functions for circuit control and protection. Independent voltage and current detection devices are typically included, but these devices are often distributed and lack an integrated design. Detecting circuit parameters requires the coordinated operation of multiple independent components, increasing system complexity and failure rates. Furthermore, circuit on / off control often relies on a relatively simple control logic, making it difficult to respond quickly and accurately to complex and changing power environments. Furthermore, traditional arc extinguishing structures are relatively simple, resulting in limited arc extinguishing efficiency, which can easily affect the lifespan and performance of the circuit breaker.

[0003] The drawback of the existing technology is that the independent voltage and current detection devices lack an integrated design, which makes the entire system structure complex, increases the difficulty of installation and maintenance, and is prone to problems of incoordination between components. Summary of the Invention

[0004] In order to solve the problem that independent voltage and current detection devices in the existing technology lack an integrated design, which makes the entire system structure complex, increases the difficulty of installation and maintenance, and is prone to problems of incoordination between components, the present application provides a pole-mounted vacuum circuit breaker with an integrated sensor. The specific solution is as follows.

[0005] A pole-mounted vacuum circuit breaker with an integrated sensor comprises a body, an insulating column and a sensor group are arranged in the body, and a vacuum tube for controlling the on-off of a circuit is arranged in the insulating column; The sensor group includes a voltage transformer, a current transformer, a voltage sensor, a current sensor, and a voltage sensor. The voltage transformer is used to convert high voltage into low voltage and input it into the voltage sensor. The current transformer is used to convert large current into standard small current and input it into the current sensor. The voltage sensor and the current sensor are both electrically connected to the insulating column. When the voltage sensor detects that the voltage exceeds the set value, it controls the vacuum tube to disconnect the circuit. When the current sensor detects that the current exceeds the set value, it controls the vacuum tube to disconnect the circuit.

[0006] By adopting the above technical solution, voltage transformers and current transformers can be used to convert high voltage into low voltage and large current into standard small current, respectively, to facilitate detection by voltage sensors and current sensors; voltage sensors and current sensors can monitor voltage and current in real time. When it is detected that the voltage or current exceeds the set value, the vacuum tube can be controlled to disconnect the circuit to protect the circuit. Integrating various sensors into a sensor group can reduce the complexity of the structure, thereby improving the convenience of installation and maintenance, and also improving the coordination of the various components.

[0007] Optionally, an upper arc extinguishing chamber and a lower arc extinguishing chamber are provided in the vacuum tube, a connecting tube is provided between the upper arc extinguishing chamber and the lower arc extinguishing chamber, an upper terminal is provided at the top of the upper arc extinguishing chamber, and a lower terminal is provided at the bottom of the lower arc extinguishing chamber, and movable terminals are provided in the connecting tube corresponding to the upper terminal and the lower terminal, the movable terminals are electrically connected to each other, and the movable terminals are slidably connected to the connecting tube, one movable terminal is used to abut the upper terminal, and the other movable terminal is used to abut the lower terminal.

[0008] By adopting the above technical solution, an upper arc extinguishing chamber, a lower arc extinguishing chamber and a connecting tube are arranged in the vacuum tube, and an upper terminal is arranged on the top of the upper arc extinguishing chamber and a lower terminal is arranged on the bottom of the lower arc extinguishing chamber. A corresponding movable terminal is arranged in the connecting tube, and the movable terminals are electrically connected to each other and slidably connected to the connecting tube. One movable terminal abuts the upper terminal and the other abuts the lower terminal, thereby realizing the conduction and disconnection functions of the circuit. Only when both the upper arc extinguishing chamber and the lower arc extinguishing chamber are turned on, the circuit is in the conduction stage, and when a breakdown occurs, usually only one of the arc extinguishing chambers will be broken down, which can avoid complete breakdown. When damage occurs, the connection in the other arc extinguishing chamber can be disconnected in time to avoid the situation where the circuit is continuously connected and causes further damage.

[0009] Optionally, a mounting plate is provided in the connecting tube corresponding to the movable terminal, the mounting plates are respectively provided at both ends of the connecting tube, the mounting plate and the connecting tube are integrally provided, and the movable terminal is slidably connected to the mounting plate.

[0010] By adopting the above technical solution, the mounting plate provides stable support and accurate sliding guide for the moving terminal, ensuring smooth sliding of the moving terminal, thereby enabling the moving terminal to reliably contact and separate from the upper and lower terminals, thereby improving the stability and reliability of the circuit breaker circuit on-off control.

[0011] Optionally, a connecting wire is provided between the movable terminals, and the connecting wire electrically connects the two movable terminals.

[0012] By adopting the above technical solution, the moving terminals are electrically connected through the connecting wire, which ensures stable electrical conductivity between the two moving terminals and enables the circuit to be reliably conductive.

[0013] Optionally, an air inlet pipe is provided on the side wall of the connecting pipe, and a gas storage tank is detachably provided on the air inlet pipe. The gas storage tank is used to store SF6 / N2 mixed gas. The gas storage tank can pass the mixed gas into the connecting pipe, and the gas storage tank is electrically connected to the sensor group.

[0014] By adopting the above technical solution, an air inlet pipe and a detachable gas tank are set on the side wall of the connecting pipe. The gas tank stores the SF6 / N2 mixed gas and introduces the mixed gas into the connecting pipe under the control of the sensor group. The excellent insulation and arc-extinguishing properties of the mixed gas can be used to enhance the insulation and arc-extinguishing capabilities of the circuit breaker. At the same time, the detachable design facilitates the replacement and maintenance of the gas tank.

[0015] Optionally, a one-way air valve is provided on the side of the mounting plate away from the interior of the connecting pipe, and the one-way air valve includes a valve cover and a valve plate, a hole is opened on the valve cover and the valve plate is arranged at the hole, and an elastic member is provided between the valve plate and the valve cover, and the elastic member has a tendency to pull the valve plate to completely cover the valve cover.

[0016] By adopting the above technical solution, a one-way vent valve is provided at the mounting plate, and the elastic part of the one-way vent valve pulls the valve plate to cover the valve cover. This structure can prevent gas backflow, ensure that the airflow in the connecting pipe flows in a predetermined direction, and improve the stability of the gas environment inside the circuit breaker. When the gas storage tank introduces mixed gas into the connecting pipe, the gas can be discharged into the arc extinguishing chamber through the one-way vent valve, reducing gas backflow and improving gas utilization.

[0017] Optionally, a bellows is provided on the outer wall of the vacuum tube corresponding to the upper arc extinguishing chamber and the lower arc extinguishing chamber, and a replacement door is provided at the position of the vacuum tube corresponding to the connecting pipe, and the replacement door is hinged to the vacuum tube and can be opened.

[0018] By adopting the above technical solution, the bellows can improve the heat dissipation effect, and the replacement door can be opened to improve the convenience of replacing the gas tank.

[0019] Optionally, the gas tank is provided with a connecting pipe corresponding to the air intake pipe, the connecting pipe can be extended into the air intake pipe, an air valve is provided in the connecting pipe, the air valve is controlled by a sensor group, a sealing groove is opened on the connecting pipe, a sealing ring is provided corresponding to the sealing groove in the air intake pipe, and the sealing ring can be embedded in the sealing groove.

[0020] By adopting the above technical solution, the connection pipe is provided to effectively install the gas tank, which can improve the installation convenience of the gas tank. At the same time, the sealing ring can achieve effective sealing, which can further improve the sealing performance and reduce gas leakage.

[0021] Optionally, a positioning groove is further provided on the connecting pipe, and a positioning piece is provided in the air intake pipe corresponding to the positioning groove. The positioning piece can be embedded in the positioning groove. A spring is also provided on the positioning piece, and the spring has a tendency to push the positioning piece to move toward the positioning groove.

[0022] By adopting the above technical solution, a positioning groove is opened on the connecting pipe, and a corresponding positioning piece with a spring is set in the intake pipe, which can accurately connect and fix the connecting pipe and the intake pipe, prevent the gas tank from loosening or detaching, and ensure that the mixed gas can stably enter the connecting pipe.

[0023] Optionally, the positioning member includes a positioning tube and a positioning block, a micro air pump is provided in the positioning tube, an air extraction hole is opened on the positioning block, the air extraction hole is connected to the interior of the positioning tube, and the positioning tube is connected to the interior of the connecting tube.

[0024] By adopting the above technical solutions, In summary, this application has at least the following beneficial effects: 1. The present application solves the problem that independent voltage and current detection devices in the prior art lack an integrated design, which makes the entire system structure complex, increases the difficulty of installation and maintenance, and is prone to problems of incoordination between components. The present application integrates different sensors into a sensor group, and a single sensor group can control the entire circuit breaker to be on and off, thereby reducing the difficulty of installation and maintenance, reducing the problem of incoordination between components, and further improving the integrity of the components.

[0025] 2. The present application also controls the on and off of the circuit breaker by setting an upper arc extinguishing chamber and a lower arc extinguishing chamber, thereby avoiding the situation where the arc extinguishing chamber is completely punctured at one time. When one of the arc extinguishing chambers is damaged, the other arc extinguishing chamber can still control the on and off of the circuit, which can reduce the situation where the circuit cannot be normally switched on and off due to damage to the arc extinguishing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a perspective view of this embodiment.

[0027] Figure 2 It is a cross-sectional view of this embodiment.

[0028] Figure 3 It is a cross-sectional view of this embodiment, mainly used to show the interior of the vacuum tube.

[0029] Description of reference numerals: 1. Ontology; 2. Insulating column; 21. Vacuum tube; 22. Upper arc extinguishing chamber; 221. Upper terminal; 23. Lower arc extinguishing chamber; 231. Lower terminal; 24. Connecting pipe; 241. Moving terminal; 242. Mounting plate; 243. Connecting wire; 244. Inlet pipe; 245. Sealing ring; 25. One-way vent valve; 251. Valve cover; 252. Valve plate; 253. Elastic member; 26. Bellows; 27. Replacement door; 28. Positioning member; 281. Spring; 282. Positioning tube; 283. Positioning block; 284. Micro air pump; 285. Air extraction hole; 3. Sensor group; 4. Gas storage tank; 41. Connecting pipe; 411. Gas valve; 412. Sealing groove; 413. Positioning groove; DETAILED DESCRIPTION The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0030] A pole mounted vacuum circuit breaker with an integrated sensor, such as Figure 1 Shown and Figure 2 As shown, the device comprises a main body 1, in which a vacuum tube 2 and a sensor group 3 are provided. The vacuum tube 2 is provided with an insulating column 21 for controlling the on / off of the circuit; the sensor group 3 comprises a voltage transformer, a current transformer, a voltage sensor, a current sensor, and a voltage sensor. The voltage transformer is used to convert high voltage into low voltage and input it into the voltage sensor, while the current transformer is used to convert high current into a standard low current and input it into the current sensor. Both the voltage sensor and the current sensor are electrically connected to the insulating column 21. When the voltage sensor detects that the voltage exceeds the set value, it controls the vacuum tube 2 to disconnect the circuit. When the current sensor detects that the current exceeds the set value, it controls the vacuum tube 2 to disconnect the circuit. In specific implementation, the voltage and current signals are first converted into low voltage and low current by the voltage transformer and the current transformer, and then sent to the voltage sensor and the current sensor for detection. When the data detected by the voltage sensor or the current sensor exceeds the set value, the insulating column 21 is immediately disconnected.

[0031] like Figure 2 and Figure 3As shown, an upper arc-extinguishing chamber 22 and a lower arc-extinguishing chamber 23 are provided in the vacuum tube 2, with a connecting pipe 24 provided between the upper arc-extinguishing chamber 22 and the lower arc-extinguishing chamber 23. An upper terminal 221 is provided at the top of the upper arc-extinguishing chamber 22, and a lower terminal 231 is provided at the bottom of the lower arc-extinguishing chamber 23. A movable terminal 241 is provided in the connecting pipe 24 corresponding to the upper terminal 221 and the lower terminal 231. The movable terminals 241 are electrically connected to each other and are slidably connected to the connecting pipe 24. One movable terminal 241 is used to abut the upper terminal 221, and the other movable terminal 241 is used to abut the lower terminal 231. Mounting plates 242 are provided in the connecting pipe 24 corresponding to the movable terminals 241. The mounting plates 242 are respectively provided at both ends of the connecting pipe 24. The mounting plates 242 are integrally provided with the connecting pipe 24, and the movable terminals 241 are slidably connected to the mounting plates 242. A connecting wire 243 is provided between the movable terminals 241, electrically connecting the two movable terminals 241. In specific implementations, the movable terminals 241 are driven by an electric push rod, the push rod portion of which is insulated. The upper movable terminal 241 abuts against the upper terminal 221, and the lower movable terminal 241 abuts against the lower terminal 231, thereby connecting the circuit and enabling conduction. Disconnecting one of the movable terminals 241 disconnects the entire circuit. Therefore, the circuit state cannot be adjusted unless both arc extinguishing chambers are damaged. The connecting wire 243 between the two movable terminals 241 is a high-voltage wire specifically designed for high-voltage lines.

[0032] like Figure 2 and Figure 3 As shown, an air inlet pipe 244 is provided on the side wall of the connecting pipe 24. A gas storage tank 4 is detachably provided on the air inlet pipe 244. The gas storage tank 4 is used to store the SF6 / N2 mixed gas. The gas storage tank 4 can pass the mixed gas into the connecting pipe 24. The gas storage tank 4 is electrically connected to the sensor group 3. In a specific implementation, the connecting pipe 24, the upper arc extinguishing chamber 22, and the lower arc extinguishing chamber 23 are all located within a single unit. The SF6 / N2 mixed gas has good insulating properties, and passing it into the arc extinguishing chamber can effectively improve the arc extinguishing effect.

[0033] like Figure 2 and Figure 3 As shown, a one-way vent valve 41125 is provided on the side of the mounting plate 242 away from the interior of the connecting pipe 24. The one-way vent valve 41125 includes a valve cover 251 and a valve plate 252. The valve cover 251 has a hole formed therein and the valve plate 252 is disposed in the hole. An elastic member 253 is disposed between the valve plate 252 and the valve cover 251. The elastic member 253 has a tendency to pull the valve plate 252 to completely cover the valve cover 251. In a specific embodiment, the one-way vent valve 41125 is pushed open only when gas is introduced, allowing gas to enter the upper arc-extinguishing chamber 22 and the lower arc-extinguishing chamber 23 for insulation. When gas is not introduced, the connecting pipe 24, the upper arc-extinguishing chamber 22, and the lower arc-extinguishing chamber 23 are independent of each other.

[0034] like Figure 2 and Figure 3 As shown, bellows 26 are provided on the outer wall of the vacuum tube 2, corresponding to the upper arc-extinguishing chamber 22 and the lower arc-extinguishing chamber 23. A replacement door 27 is provided at the position of the vacuum tube 2 corresponding to the connecting pipe 24. The replacement door 27 is hingedly connected to the vacuum tube 2 and can be opened. The gas storage tank 4 is provided with a connecting pipe 41, corresponding to the air inlet pipe 244. The connecting pipe 41 can extend into the air inlet pipe 244. The connecting pipe 41 is provided with a gas valve 411, which is controlled by the sensor group 3. The connecting pipe 41 is provided with a sealing groove 412. A sealing ring 245 is provided in the air inlet pipe 244, corresponding to the sealing groove 412. The sealing ring 245 can be embedded in the sealing groove 412. During specific implementation, the replacement door 27 is set at the position corresponding to the gas tank 4. When replacing the gas tank 4, it is only necessary to insert the connecting pipe 41 into the air inlet pipe 244, embed the sealing ring 245 into the sealing groove 412, and then electrically connect the gas tank 4 to the sensor group 3. Then, it can be determined through the sensor data whether a mixed gas needs to be introduced for insulation.

[0035] like Figure 2 and Figure 3 As shown, the connecting tube 41 is further provided with a positioning groove 413. A positioning member 28 is provided in the air inlet pipe 244 corresponding to the positioning groove 413. The positioning member 28 can be embedded in the positioning groove 413. The positioning member 28 is further provided with a spring 281, which has a tendency to push the positioning member 28 toward the positioning groove 413. The positioning member 28 includes a positioning tube 282 and a positioning block 283. The positioning tube 282 is provided with a micro air pump 284. The positioning block 283 is provided with an air extraction hole 285. The air extraction hole 285 is connected to the interior of the positioning tube 282, and the positioning tube 282 is connected to the interior of the connecting tube 24. During specific implementation, a positioning groove 413 and a corresponding positioning groove 413 are set. When the positioning block 283 is embedded in the positioning groove 413, it can play a positioning role. When the exhaust hole 285 is exhausting air, the sealing effect can be increased. When part of the sealing fails, the leaked gas can be re-injected through the exhaust hole 285, further improving the utilization rate of the gas.

[0036] Working principle: This application integrates various different sensors into a sensor group 3. A single sensor group 3 can control the entire circuit breaker to be on and off, thereby reducing the difficulty of installation and maintenance. At the same time, by setting up an upper arc extinguishing chamber 22 and a lower arc extinguishing chamber 23, the stability of arc extinguishing is further improved.

[0037] The above are preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A pole-mounted vacuum circuit breaker with an integrated sensor, characterized in that: It comprises a body (1), an insulating column (21) and a sensor group (3) are arranged in the body (1), and a vacuum tube (2) for controlling the on-off of a circuit is arranged in the insulating column (21); The sensor group (3) includes a voltage transformer, a current transformer, a voltage sensor, a current sensor, and a voltage sensor. The voltage transformer is used to convert a high voltage into a low voltage and input it into the voltage sensor. The current transformer is used to convert a large current into a standard small current and input it into the current sensor. The voltage sensor and the current sensor are both electrically connected to the insulating column (21). When the voltage sensor detects that the voltage exceeds a set value, the vacuum tube (2) is controlled to disconnect the circuit. When the current sensor detects that the current exceeds a set value, the vacuum tube (2) is controlled to disconnect the circuit.

2. The pole-mounted vacuum circuit breaker with an integrated sensor according to claim 1, characterized in that: An upper arc extinguishing chamber (22) and a lower arc extinguishing chamber (23) are provided in the vacuum tube (2); a connecting pipe (24) is provided between the upper arc extinguishing chamber (22) and the lower arc extinguishing chamber (23); an upper terminal (221) is provided at the top of the upper arc extinguishing chamber (22); a lower terminal (231) is provided at the bottom of the lower arc extinguishing chamber (23); movable terminals (241) are provided in the connecting pipe (24) corresponding to the upper terminal (221) and the lower terminal (231); the movable terminals (241) are electrically connected to each other, and the movable terminals (241) are slidably connected to the connecting pipe (24); one movable terminal (241) is used to abut against the upper terminal (221), and the other movable terminal (241) is used to abut against the lower terminal (231).

3. The pole-mounted vacuum circuit breaker with an integrated sensor according to claim 2, characterized in that: A mounting plate (242) is provided in the connecting tube (24) corresponding to the movable terminal (241). The mounting plates (242) are respectively provided at both ends of the connecting tube (24). The mounting plates (242) and the connecting tube (24) are integrally provided. The movable terminal (241) is slidably connected to the mounting plates (242).

4. The pole-mounted vacuum circuit breaker with an integrated sensor according to claim 3, characterized in that: A connecting line (243) is provided between the movable terminals (241), and the connecting line (243) electrically connects the two movable terminals (241).

5. The pole-mounted vacuum circuit breaker with an integrated sensor according to claim 4, characterized in that: An air inlet pipe (244) is provided on the side wall of the connecting pipe (24), and a gas storage tank (4) is detachably provided on the air inlet pipe (244). The gas storage tank (4) is used to store SF6 / N2 mixed gas. The gas storage tank (4) can pass the mixed gas toward the connecting pipe (24), and the gas storage tank (4) is electrically connected to the sensor group (3).

6. The pole-mounted vacuum circuit breaker with an integrated sensor according to claim 5, characterized in that: A one-way vent valve (411) (25) is provided on the side of the mounting plate (242) away from the interior of the connecting pipe (24), and the one-way vent valve (411) (25) includes a valve cover (251) and a valve plate (252), wherein a hole is provided on the valve cover (251) and the valve plate (252) is provided at the hole, and an elastic member (253) is provided between the valve plate (252) and the valve cover (251), and the elastic member (253) has a tendency to pull the valve plate (252) to completely cover the valve cover (251).

7. The pole-mounted vacuum circuit breaker with an integrated sensor according to claim 5, characterized in that: A bellows (26) is provided on the outer wall of the vacuum tube (2) corresponding to the upper arc extinguishing chamber (22) and the lower arc extinguishing chamber (23); a replacement door (27) is provided at a position of the vacuum tube (2) corresponding to the connecting pipe (24); the replacement door (27) is hinged to the vacuum tube (2) and can be opened.

8. The pole-mounted vacuum circuit breaker with an integrated sensor according to claim 7, characterized in that: The gas storage tank (4) is provided with a connecting pipe (41) corresponding to the air intake pipe (244), the connecting pipe (41) can be inserted into the air intake pipe (244), an air valve (411) is provided in the connecting pipe (41), the air valve (411) is controlled by the sensor group (3), a sealing groove (412) is provided on the connecting pipe (41), a sealing ring (245) is provided in the air intake pipe (244) corresponding to the sealing groove (412), and the sealing ring (245) can be embedded in the sealing groove (412).

9. The pole-mounted vacuum circuit breaker with an integrated sensor according to claim 8, characterized in that: The connecting pipe (41) is further provided with a positioning groove (413), and a positioning member (28) is provided in the air intake pipe (244) corresponding to the positioning groove (413). The positioning member (28) can be embedded in the positioning groove (413), and a spring (281) is further provided on the positioning member (28). The spring (281) has a tendency to push the positioning member (28) toward the positioning groove (413).

10. The pole-mounted vacuum circuit breaker with an integrated sensor according to claim 9, characterized in that: The positioning member (28) includes a positioning tube (282) and a positioning block (283). A micro air pump (284) is provided in the positioning tube (282). An air extraction hole (285) is provided on the positioning block (283). The air extraction hole (285) is communicated with the interior of the positioning tube (282), and the positioning tube (282) is communicated with the interior of the connecting tube (24).

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