Capacitor power type primary and secondary integrated complete set pole circuit breaker

Abstract

The application relates to a capacitor power-taking type primary-secondary fusion complete set pole circuit breaker, which comprises a vacuum arc-extinguishing chamber, a mechanism box, a current-voltage combined type mutual inductor, a power-taking capacitor and a disconnector; the mechanism box is located at the lower side of the vacuum arc-extinguishing chamber and is used for controlling the on-off of vacuum switches in the vacuum arc-extinguishing chamber; an energy storage mechanism, a switching mechanism and a control interface are arranged in the mechanism box; the energy storage mechanism comprises a tension spring and a linkage device; a joint control assembly is arranged in the vacuum arc-extinguishing chamber; an auxiliary control assembly is arranged on the tension spring; the joint control assembly can provide short-time tension to the auxiliary control assembly to control the tension spring to accelerate recovery; the application has the technical effect of assisting in accelerating the spring recovery speed and giving a larger recovery force during power-off.

Description

Technical Field

[0001] This application relates to the technical field of circuit protection devices, and in particular to a capacitor-powered integrated primary and secondary pole-mounted circuit breaker. Background Technology

[0002] Pole-mounted circuit breakers are indispensable protective devices in power grids, providing circuit interruption, overload protection, and short-circuit protection. Typically installed on transmission line poles, they can quickly disconnect the circuit in case of abnormal transmission conditions, preventing hazards such as overloads and short circuits and protecting the power system. Specifically, a pole-mounted circuit breaker consists of a pole, a control box, and a Feeder Terminal Unit (FTU). The pole is usually equipped with current and / or voltage sensors. The detection signals from these sensors are transmitted to the FTU. The FTU determines whether the transmission condition is abnormal based on these signals. If an abnormality is detected, it sends an action signal to the control box, which then pulls the insulating rod in the pole, thereby quickly disconnecting the circuit.

[0003] Regarding the aforementioned technologies, the inventors believe that after prolonged use, the tension springs that provide the circuit breaker with the ability to disconnect are prone to insufficient tension. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a capacitor-powered integrated primary and secondary pole-mounted circuit breaker.

[0005] This application provides a capacitor-powered integrated primary and secondary pole-mounted circuit breaker, which adopts the following technical solution:

[0006] A capacitor-powered integrated pole-mounted circuit breaker includes a vacuum interrupter, a mechanism box, a current-voltage combined transformer, a power-collecting capacitor, and a disconnecting switch. The mechanism box is located below the vacuum interrupter and is used to control the opening and closing of the vacuum switch inside the vacuum interrupter. The mechanism box is equipped with an energy storage mechanism, a switching mechanism, and a control interface. The energy storage mechanism includes a tension spring and a linkage device. A control assembly is installed inside the vacuum interrupter, and an auxiliary control assembly is installed on the tension spring. The control assembly can provide a short-term tension to the auxiliary control assembly to control the tension spring to accelerate its recovery.

[0007] By adopting the above technical solution, when the circuit breaker performs a closing operation, an electric arc will be generated based on the current circuit specifications at the beginning of the operation. At the same time, a certain initial force will be provided by the tension spring to control the circuit breaker to open quickly. At this time, the main force controlling the closing of the circuit breaker is on the tension spring. If the tension spring is used for a long time, it will wear out, causing the circuit breaker to be unable to close or open quickly. By using the set interlocking components and auxiliary control components in conjunction, when the tension spring is stretched or contracted to near its limit, an auxiliary tension spring can be provided with the force to operate, so that the tension spring can be pulled to the bottom every time it operates, thus providing equipment safety.

[0008] Preferably, the control assembly includes an arc absorbing unit disposed in the vacuum interrupter chamber. The arc absorbing unit includes a current-draining end and a coil coiled below the current-draining end. A control rod that can move up and down is disposed inside the coil, and a first control magnet is disposed at the lower end of the control rod.

[0009] By adopting the above technical solution, an instantaneous current is generated by using an electric arc, which in turn generates current in the coil. Based on the principle of electromagnetism, the movement of the first linked magnet on the linkage rod is controlled, enabling the first linked magnet to perform an attraction action, thereby assisting the tension spring to pull to the corresponding limit position.

[0010] Preferably, the upper end of the tension spring is fixedly connected to the top of the mechanism box, and the auxiliary control component includes an auxiliary control unit fixedly connected to the lower end of the tension spring. An upwardly extending extension rod is fixedly connected to the auxiliary control unit, and a second control magnet is fixedly connected to the top of the extension rod; the first control magnet and the second control magnet correspond to each other.

[0011] By adopting the above technical solution, the second linked magnet on the extension rod is used for auxiliary control. In conjunction with the first linked magnet, a strong pulling force is generated when the mechanism box and the vacuum interrupter are not connected to each other, thereby assisting the tension spring to reach its limit position.

[0012] Preferably, the top of the tension spring is provided with a rotatable adjusting plate, the outer ring surface of the adjusting plate is provided with external teeth, and the mechanism box is provided with a rotatable ratchet corresponding to the position of the external teeth of the adjusting plate. The ratchet cooperates with the external teeth to prevent the external teeth from rotating. The adjusting plate is provided with a driving component to control the rotation of the adjusting plate, and the top end of the tension spring is fixedly connected to the adjusting plate.

[0013] By adopting the above technical solution, since the tension spring itself has insufficient elasticity, the spring can be made to have a stronger control force by torsion spring. When the adjustment disc is rotated, the tension spring will deform to a certain extent, but it will not affect its use and can extend its service life. After the adjustment disc is rotated for adjustment, the adjustment disc can be stopped by ratchet control and then fixed at the current position. The operation is simple and convenient.

[0014] Preferably, a slidable magnetic isolation plate is provided on the mechanism box at the position corresponding to the second control magnet; an indicator is provided on the extension rod to indicate the current reset position of the tension spring.

[0015] By adopting the above technical solution, under normal circumstances, when performing closing or opening operations, the linkage control component and auxiliary control component provide auxiliary pulling force to the tension spring. However, the state of the tension spring itself is not easy to know. At this time, a magnetic isolation plate can be set to isolate the magnetic force and prevent the first linkage magnet and the second linkage magnet from attracting each other. Then, the indicator can be used to know whether the current tension spring meets the requirements for a period of time in the future. If there is a problem, it can be replaced in time.

[0016] Preferably, the vacuum interrupter includes an airtight insulating shell, a fixed end cover plate, a moving end cover plate, and a bellows. The fixed end cover plate and the moving end cover plate are respectively provided with the upper and lower ends of the airtight insulating shell. A gap is opened on one side of the airtight insulating shell, and the control assembly is disposed in the gap.

[0017] Preferably, the gap has micropores, the drain end extends out of the micropores, and a deformable insulating rubber block is attached to the outside of the gap at the position corresponding to the micropores. The insulating rubber block can be deformed by heat to cover the micropores, and the drain end has branches that are inserted into the insulating rubber block.

[0018] By adopting the above technical solution, there are two exposed power supply terminals inside the vacuum interrupter, so it is not easy to place metal objects inside for a long time. When the current is drawn into the coil, the large arc intensity will generate heat. At the same time, the two power supply terminals inside the vacuum interrupter will also generate heat during operation. Since the characteristic of the insulating rubber block deforming when heated can be used to cover the micropores at the corresponding positions, the linkage can be achieved.

[0019] Preferably, the middle part of the extension rod is a permanent magnet rod, the lower part of the permanent magnet rod is provided with a baffle, and a heating coil is sleeved on the permanent magnet rod.

[0020] By adopting the above technical solution, a permanent magnet rod is set in the middle of the extension rod, and a heating coil is set on it. When the extension rod moves, the corresponding heating coil will cut the magnetic field lines, thereby generating current. Since the heating coil is freely mounted at the position of the permanent magnet rod, it will bounce back and forth several times, thereby generating a small amount of heat, which can drive out a small amount of moisture inside the mechanism box.

[0021] Preferably, the side of the mechanism box is provided with an airflow opening, and a dehumidification baffle is provided at the airflow opening.

[0022] By adopting the above technical solution, moisture can be easily removed through the airflow opening, and moisture can be prevented from entering the mechanism box through the dehumidification baffle.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. When the circuit breaker performs closing or opening operations, an electric arc is generated based on the current circuit specifications at the beginning of the operation. At the same time, a certain initial force is applied through the tension spring to control the circuit breaker to open quickly. At this time, the main force controlling the closing or opening of the circuit breaker is on the tension spring. If the tension spring is used for a long time, it will wear out, causing the circuit breaker to be unable to close or open quickly. Through the joint control component and auxiliary control component working together, when the tension spring is extended or contracted to near its limit, an auxiliary tension spring is applied to perform the action, so that the tension spring can be fully pulled to the end each time it is operated, thus providing equipment safety.

[0025] 2. The vacuum interrupter chamber contains two exposed power supply terminals, so it is not advisable to place metal objects inside for a long time. When the current is drawn into the coil, the high intensity of the arc will generate heat. At the same time, the two power supply terminals inside the vacuum interrupter chamber will also generate heat during operation. The heat can be covered by the heat-deformed properties of the insulating rubber block, thereby achieving linkage. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the embodiment.

[0027] Figure 2 This is a side view of the current-voltage combined transformer in the embodiment.

[0028] Figure 3 This is a schematic diagram of the structure of the power-taking capacitor highlighted in the embodiment.

[0029] Figure 4 This is a schematic diagram of the overall structure of the embodiment.

[0030] Figure 5yes Figure 4 Enlarged view of section A.

[0031] Figure 6 yes Figure 5 Enlarged view of section B in the middle.

[0032] Figure 7 This is a schematic diagram highlighting the auxiliary control component in the embodiment.

[0033] Figure 8 This is a schematic diagram of the structure of the adjustment disc highlighted in the embodiment.

[0034] Explanation of reference numerals in the attached drawings: 1. Vacuum interrupter; 11. Interlocking control assembly; 111. Current-draining end; 112. Coil; 113. Positioning plate; 114. Return spring; 115. Interlocking control rod; 116. First interlocking magnet; 12. Airtight insulating shell; 13. Fixed end cover plate; 14. Moving end cover plate; 16. Gap; 161. Micro-hole; 162. Insulating rubber block; 2. Mechanism box; 21. Tension spring; 22. Linkage device; 2 3. Auxiliary control components; 231. Auxiliary control unit; 232. Extension rod; 233. Second linkage magnet; 234. Adjustment disc; 235. Ratchet; 24. Magnetic isolation plate; 25. Indicator; 26. Permanent magnet rod; 261. Baffle; 262. Heating coil; 27. Airflow opening; 271. Dehumidification baffle; 3. Energy storage mechanism; 4. Switching mechanism; 5. Control interface; 6. Current and voltage combined transformer; 7. Power extraction capacitor. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0036] A capacitor-powered integrated primary and secondary pole-mounted circuit breaker. (Refer to...) Figure 1 and Figure 3 It includes a vacuum interrupter 1, a mechanism box 2, a current and voltage combined transformer 6, a power taking capacitor 7, and a disconnecting switch; the mechanism box 2 is located on the lower side of the vacuum interrupter 1 and is used to control the opening and closing of the vacuum switch in the vacuum interrupter 1; the mechanism box 2 is equipped with an energy storage mechanism 3, a switching mechanism 4, and a control interface 5.

[0037] Reference Figure 4 and Figure 5The energy storage mechanism 3 includes a tension spring 21 and a linkage device 22. A control component 11 is installed inside the vacuum interrupter 1. An auxiliary control component 23 is installed on the tension spring 21. The control component 11 can provide a short-term tension to the auxiliary control component 23 to control the tension spring 21 to accelerate its recovery. The vacuum interrupter 1 includes an airtight insulating shell 12, a fixed end cover plate 13, a moving end cover plate 14 and a bellows. The fixed end cover plate 13 and the moving end cover plate 14 are respectively provided with the upper and lower ends of the airtight insulating shell 12. A gap 16 is opened on one side of the airtight insulating shell 12, and the control component 11 is installed in the gap 16.

[0038] Reference Figure 5 and Figure 6 The control assembly 11 includes an arc absorption unit disposed within the vacuum interrupter 1. The arc absorption unit includes a lead-in end 111 and a coil 112 coiled below the lead-in end 111. A control rod 115, movable vertically, is disposed within the coil 112. A return spring 114 is fixedly connected to the upper end of the control rod 115, and a positioning plate 113 is fixedly connected to the upper end of the return spring 114. The plate is fixedly connected to the vacuum interrupter 1. A first control magnet 116 is disposed at the lower end of the control rod 115. A gap 16 is formed... There is a micropore 161, and a drainage end 111 extends out of the micropore 161. A deformable insulating rubber block 162 is attached to the outside of the gap 16 corresponding to the position of the micropore 161. The insulating rubber block 162 can be deformed by heat to cover the micropore 161. The drainage end 111 has a branch and the branch is inserted into the insulating rubber block 162. The upper end of the tension spring 21 is fixedly connected to the top of the mechanism box 2. The auxiliary control component 23 includes an auxiliary control 231 fixedly connected to the lower end of the tension spring 21. An upwardly extending extension rod 232 is fixedly connected to the auxiliary control 231 (see details). Figure 7 The top of the extension rod 232 is fixedly connected to a second control magnet 233; the first control magnet 116 and the second control magnet 233 correspond to each other.

[0039] When the closing operation is performed, the appropriate tension spring 21 provides a power to control the closing. At this time, the reset spring 114 contracts to control the two power supply line terminals in the vacuum interrupter 1 to move closer to each other, which will generate an electric arc. The current-carrying end 111 will transfer the current generated by the electric arc to the coil 112. At this time, the coil 112 will generate a certain magnetic field, which will control the linkage rod 115 to move downward. At this time, the tension spring 21 contracts and the second linkage magnet 233 moves closer to the first linkage magnet 116. The two attract each other to provide a strong pulling force, which facilitates rapid closing.

[0040] The top of the tension spring 21 is equipped with a rotatable adjustment disc 234 (see details). Figure 8The outer ring surface of the adjusting disk 234 is provided with external teeth. The mechanism box 2 is provided with a rotatable ratchet 235 corresponding to the position of the external teeth of the adjusting disk 234. The ratchet 235 cooperates with the external teeth to prevent the external teeth from rotating. The adjusting disk 234 is provided with a driving component to control the rotation of the adjusting disk 234. The top end of the tension spring 21 is fixedly connected to the adjusting disk 234.

[0041] A slidable magnetic isolation plate 24 is provided on the mechanism box 2 at the position corresponding to the second control magnet 233; an indicator 25 is provided on the extension rod 232 to indicate the current reset position of the tension spring 21; a permanent magnet rod 26 is located in the middle of the extension rod 232; a baffle 261 is provided at the lower part of the permanent magnet rod 26; a heating coil 262 is sleeved on the permanent magnet rod 26; an airflow opening 27 is provided on the side of the mechanism box 2; and a dehumidification baffle 271 is provided at the airflow opening 27.

[0042] The working principle of the capacitor-powered integrated primary and secondary pole-mounted circuit breaker in this application is as follows:

[0043] When the circuit breaker performs a closing operation, an electric arc is generated based on the current circuit specifications at the initial stage of the operation. Simultaneously, the tension spring 21 provides an initial force to control the circuit breaker to open quickly. At this point, the main force controlling the circuit breaker's closing is on the tension spring 21. However, if the tension spring 21 is used for an extended period, it will wear down, causing the circuit breaker to fail to close or open quickly. Through the coordinated operation of the interlocking control component 11 and the auxiliary control component 23, an auxiliary force is provided to the tension spring 21 when it extends or contracts to near its limit, ensuring that the tension spring 21 operates smoothly each time. The movement can be fully extended, ensuring the safety of the equipment. By utilizing the instantaneous current generated by the electric arc, a current is generated in the coil 112. Based on the principle of electromagnetism, the movement of the first control magnet 116 on the control rod 115 is controlled, enabling the first control magnet 116 to perform an adsorption action, assisting the tension spring 21 to be pulled to the corresponding limit position. The second control magnet 233 on the extension rod 232 provides auxiliary control, working in conjunction with the first control magnet 116, to generate a strong pulling force even when the mechanism box 2 and the vacuum interrupter 1 are not interconnected, thereby assisting the tension spring 21 to reach its limit position.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A capacitor-powered integrated primary and secondary pole-mounted circuit breaker, characterized in that: Including vacuum interrupter (1), mechanism box (2), current voltage combination type mutual inductor (6), power supply capacitor (7) and disconnecting switch;The mechanism box (2) is located in the lower side of the vacuum interrupter (1) for controlling the on-off of the vacuum switch in the vacuum interrupter (1);The mechanism box (2) is provided with energy storage mechanism (3), opening and closing mechanism (4) and control interface (5), the energy storage mechanism includes tension spring (21) and linkage device (22), the vacuum interrupter (1) is provided with linkage control assembly (11), the tension spring (21) is provided with auxiliary control assembly (23), the linkage control assembly (11) can provide short time tension to the auxiliary control assembly (23) to control the tension spring (21) to accelerate recovery;The linkage control assembly (11) includes arc absorption unit arranged in the vacuum interrupter (1), the arc absorption unit includes flow guide end (111) and coil (112) arranged in spiral under the flow guide end (111), the coil (112) is provided with linkage control rod (115) that can move up and down, the lower end of the linkage control rod (115) is provided with first linkage control magnet (116);The upper end of the tension spring (21) is fixedly connected to the top of the mechanism box (2), the auxiliary control assembly (23) includes auxiliary control (231) fixedly connected to the lower end of the tension spring (21), the auxiliary control (231) is fixedly connected with upward extending rod (232), the top of the extending rod (232) is fixedly connected with second linkage control magnet (233);The first linkage control magnet (116) and the second linkage control magnet (233) correspond;The vacuum interrupter (1) includes airtight insulation shell (12), one side of the airtight insulation shell (12) is provided with gap (16), the linkage control assembly (11) is arranged in the gap (16), the gap (16) is provided with micropore (161), the flow guide end (111) extends from the micropore (161), the gap (16) is attached with deformable insulation rubber block (162) corresponding to the position of the micropore (161), the insulation rubber block (162) can be deformed to cover the micropore (161), the flow guide end (111) is provided with branch and is inserted into the insulation rubber block (162).

2. A one and two phase integrated set pole mounted circuit breaker of the capacitor power drawn type as claimed in claim 1 wherein: The top of the tension spring (21) is provided with rotatable adjusting disc (234), the outer ring surface of the adjusting disc (234) is provided with external teeth, the mechanism box (2) is provided with rotatable ratchet (235) corresponding to the position of the external teeth of the adjusting disc (234), the ratchet (235) is matched with the external teeth to prevent the external teeth from rotating, the adjusting disc (234) is provided with driving part for controlling the rotation of the adjusting disc (234), the top end of the tension spring (21) is fixedly connected to the adjusting disc (234).

3. A one and two phase integrated set pole mounted circuit breaker of the capacitor power drawn type as claimed in claim 1 wherein: A slidable magnetic isolation plate (24) is arranged on the mechanism box (2) corresponding to the position of the second joint control magnet (233); an indicator (25) is arranged on the extension rod (232) to indicate the reset position of the current tension spring (21).

4. A two-in-one integrated pole-mounted circuit breaker of the capacitor power taking type according to claim 1, characterized in that: The vacuum arc-extinguishing chamber (1) further comprises a fixed end cover plate (13), a moving end cover plate (14) and a bellows, the fixed end cover plate (13) and the moving end cover plate (14) are respectively arranged at the upper and lower ends of the air-tight and insulating shell (12).

5. A two-in-one integrated pole-mounted circuit breaker of the capacitor power deriving type as claimed in claim 1, wherein said circuit breaker is of the type wherein said primary winding is connected to said secondary winding through said capacitor. A permanent magnet rod (26) is arranged at the middle position of the extension rod (232), the lower part of the permanent magnet rod (26) is provided with a baffle (261), and a heating coil (262) is sleeved on the permanent magnet rod (26).

6. A two-in-one integrated pole-mounted circuit breaker of the capacitor power taking type according to claim 5, characterized in that: An air flow opening (27) is arranged on the side of the mechanism box (2), and a dehumidification baffle (271) is arranged at the air flow opening (27).

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