High-voltage vacuum circuit breaker

Abstract

The invention discloses a high-voltage vacuum circuit breaker, which comprises a supporting seat, an escapement control element is arranged on the supporting seat, a power line penetrates through the escapement control element, the driving end part of the power line is connected with a driving element, and the driving element can drive the escapement control element to be switched from a separated state to a line escapement state through power applied to the escapement control element by the power line. A power-off main control part connected with the capture control element receives the acting force of the capture control element and is switched from a switch-on state to a switch-off state, and the power-off main control part is connected with the vacuum switch and drives the vacuum switch to cut off a circuit; the length of the free falling body can be determined by the position of an external step arranged on the power line, the larger the length of the free falling body is, the larger the kinetic energy obtained by the free falling body is, the generated kinetic energy can cut off a circuit of the vacuum switch instantly, and in order to avoid instant braking of the power line, the external step is damaged.

Description

Technical Field

[0001] This invention relates to a high-voltage vacuum circuit breaker. Background Technology

[0002] In high-voltage power systems, high-voltage vacuum circuit breakers are very important control and protection devices. Their main function is to connect and disconnect circuits under normal load and to quickly cut off the current in the event of faults such as short circuits, so as to protect the lines and electrical facilities.

[0003] In high-voltage vacuum circuit breakers, the core component is the vacuum interrupter, which utilizes the principle that the metal vapor plasma generated by the electric arc in a vacuum environment can be rapidly diffused and extinguished when the current crosses zero to achieve reliable interruption. Currently, conventional high-voltage vacuum circuit breakers include operating mechanisms, vacuum interrupters, insulation supports, and transmission mechanisms.

[0004] Existing high-voltage vacuum circuit breakers utilize energy storage springs as the primary power source, combined with escapement and transmission mechanisms to control the gradual release of power. This results in a complex internal transmission mechanism and difficulties in maintenance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a novel circuit breaker capable of instantly generating significant kinetic energy and simplifying the internal structure of the high-voltage vacuum circuit breaker. It utilizes the instantaneous power gained from the power line to trigger the braking of the power line by the capture mechanism, thereby transferring the kinetic energy from the power line to the power-off control unit via the capture mechanism, enabling the power-off control unit to switch from an on state to an off state. Furthermore, the high-voltage vacuum circuit breaker provided by this invention allows for independent operation of each vacuum switch, with each vacuum switch independently controlled by a power line, overcoming the problem that traditional high-voltage vacuum circuit breakers cannot operate independently.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows.

[0007] A high-voltage vacuum circuit breaker includes a support base on which an escapement element is mounted. A power line passes through the escapement element, and a drive element is connected to the drive end of the power line. The drive element can drive the escapement element to switch from an isolated state to an escapement state by applying power to the escapement element through the power line. A power-off control unit connected to the escapement element receives the force from the escapement element and switches from an on state to an off state. The power-off control unit is connected to a vacuum switch and causes the vacuum switch to cut off the circuit.

[0008] Based on the technical solution provided by this invention, the length of the free fall of the driving element is L. The length of the free fall can be determined by the position of the external step arranged on the power line. The greater the length of the free fall, the greater the kinetic energy it obtains. The kinetic energy generated can disconnect the vacuum switch circuit instantly. In order to avoid the power line stopping instantly and causing damage to the external step, this invention uses a catch-control element to brake the power line to prevent the mechanism from failing to operate normally when the external step is damaged.

[0009] The improvement of the above technical solution is that the control element includes a base plate that slides on the support base, a trapezoidal control groove is provided in the base plate, two wedge blocks are slidably arranged in the control groove, and guide surfaces that match the inclined surfaces on both sides of the control groove are provided on the wedge blocks. The power line passes through the lower edge of the control groove, between the two wedge blocks, and is led out from the upper edge of the control groove in sequence.

[0010] In the above-mentioned scheme, driven by the power line, the wedge blocks converge toward the center in the control slot, which can constrain and brake the power line between the two wedge blocks, thereby quickly completing the capture of the power line by the capture element.

[0011] Further improvements and optimizations are made in that the driving element is a counterweight, which gains kinetic energy during free fall.

[0012] Based on the above scheme, the support base is provided with a through hole to provide clearance for the free fall motion of the counterweight. The counterweight falls freely at a high position and uses this to pull the power line to transmit kinetic energy to the capture and control mechanism.

[0013] A further improvement is that a base cover is fixedly installed on the substrate, an outwardly protruding actuating block is provided on the wedge block, an avoidance groove is provided on the base cover to provide clearance for the actuating block, a sliding block is slidably installed on the base cover, a constraint groove is provided on the sliding block to match the actuating block and arranged at an angle, a sensing plate is provided at the suspension end of the sliding block, an external protrusion is provided on the power line, the external protrusion can transmit force to the sensing plate and push the sliding block to move, and the constraint groove pushes the actuating block to move towards the center and makes the wedge block brake and constrain the power line.

[0014] Based on the above scheme, the external protrusion on the power line applies a triggering force to the induction plate arranged on the sliding block, so that the sliding plate drives the toggle block and the wedge block to move through the constraint groove, thereby completing the braking of the power line.

[0015] Further improvements and optimizations to the above scheme are as follows: a guide rod is provided on the base cover, a guide hole matching the guide rod is provided on the sliding block, and a control spring for pushing the sliding block to reset is arranged between the base cover and the sliding block. The support base is provided with a trigger guide rod arranged along the direction of the power line movement, and the base plate is provided with a lug that matches the trigger guide rod. A traction plate is also slidably matched on the trigger guide rod, and the traction plate can accept the push of the base plate and be displaced.

[0016] Based on the above scheme, the force exerted by the power line on the capture mechanism will push the base plate to move along the guide direction of the trigger guide rod. During the reset phase, the base plate will be driven to reset by the main control spring arranged in the power-off main control unit.

[0017] A more optimized technical solution is that a winding element for storing power lines is arranged on the support base. The winding element includes a central shaft rotatably mounted on the support base and a coiled reel fixed to the central shaft. The drive end of the central shaft is connected to an external drive component through a transmission assembly. The power provided by the drive component can drive the coiled reel to rotate and realize the storage of power lines.

[0018] Based on the above scheme, the coil reel can store the power line and quickly reset it, thus stabilizing the normal operation of the mechanism.

[0019] A further improvement is that the traction plate is hinged to the power-off main control, and when the traction plate is displaced, it can drive the power-off main control to switch from the on state to the off state.

[0020] Based on the above scheme, the power-off main control can quickly cut off the vacuum switch. It utilizes the advantages of the linkage mechanism to amplify the movement stroke of the main control rod output end.

[0021] A more detailed optimization scheme is that the power-off main control unit includes a main control rod hinged to the support base and a drive rod hinged to the traction plate. The other end of the drive rod is hinged to the middle position of the main control rod. A rocker arm is hinged to the suspended end of the main control rod. The other end of the rocker arm is connected to the drive end of the vacuum switch. A main control spring for traction main control rod reset is also provided between the main control rod and the support base.

[0022] Based on the above scheme, the main control rod deflects under the traction of the drive rod, and under the action of the rocker arm, it obtains a large stroke and quickly completes the power-off operation of the vacuum switch.

[0023] Further improvements include a lifting element on the support base for controlling the switching between the high position and the falling position of the drive element. When the lifting element removes the constraint on the drive element, the drive element will switch from the high position to the free fall state.

[0024] Based on the above scheme, the lifting element has a constraining effect on the driving element. When the constraint is removed, the driving element will undergo free fall motion, thereby transferring kinetic energy to the power line.

[0025] A more detailed improvement is that the lifting element includes a central block, with a lifting block and a bending block fixedly connected to its two ends respectively. The connection between the central block and the lifting block is rotatably connected to the support base. A spindle is arranged at the suspended end of the bending block, and a positioning groove matching the spindle is provided at the bottom of the counterweight block.

[0026] Based on the above scheme, an upward force is applied to the lifting block, which can cause the spindle to disengage from the positioning groove, thereby eliminating the constraint effect of the lifting element on the driving element. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 A schematic diagram showing the structure that matches the driving element and the lifting element.

[0029] Figure 3 A schematic diagram showing the structure that matches the base cover and sliding block.

[0030] Figure 4 A schematic diagram showing the structure that matches the substrate and the wedge block.

[0031] Figure 5 A schematic diagram showing the structure that matches the sliding block, constraint groove, and induction plate.

[0032] Figure 6 A schematic diagram showing the structure matching the drive lever, main control lever, and rocker arm.

[0033] Figure 7 A schematic diagram showing the structure that matches the positioning groove and the mandrel. Detailed Implementation

[0034] The high-voltage vacuum circuit breaker provided by this invention uses gravitational potential energy as the driving force and quickly cuts off the vacuum switch during the acceleration phase, thereby solving the problems of high cost and inconvenient operation of existing high-voltage vacuum circuit breakers. Based on the design scheme provided by this invention, the counterweight gains a rapid increase in kinetic energy during free fall and is instantly captured by the capture element, so as to realize the transfer of the kinetic energy of the counterweight to the power-off main control. When the vacuum switch receives the drive of the power-off main control, it will instantly cut off the power supply to maintain power safety.

[0035] See attached document Figure 1 , 2The provided embodiment describes a high-voltage vacuum circuit breaker including a support base 10. A winding element 70 for storing power lines is arranged on the support base 10. After the power lines are led out from the winding element 70, they pass through a catch element 20 and a guide wheel arranged on the support base 10, and are then connected to a drive element 50. The winding element 70 includes a central shaft rotatably mounted on the support base 10 and a coiled reel fixed to the central shaft. The drive end of the central shaft is connected to an external drive component (not shown in the figure) through a transmission assembly. The power provided by the drive component can drive the coiled reel to rotate and realize the storage of the power lines. The drive element 50 is in free fall motion, and during the free fall process, the drive element 50 can pull the power lines out of the coiled reel.

[0036] See attached document Figure 3 , 4 The detailed features of the escapement element 20 provided in section 5 are as follows: the escapement element 20 includes a base plate 21 that slides on the support base 10. The base plate 21 is provided with a trapezoidal control groove. Two wedge blocks 27 are slidably disposed in the control groove. The wedge blocks 27 are provided with guide surfaces that match the inclined surfaces on both sides of the control groove. The power line passes through the lower edge of the control groove, between the two wedge blocks 27, and is led out from the upper edge of the control groove. The driving element 50 is a counterweight 51. During the free fall motion, the counterweight 51 will drive the power line to move from the lower edge of the control groove to the upper edge.

[0037] For more details, please see the appendix. Figure 5 A base cover 22 is fixedly disposed on the base plate 21. A wedge block 27 is provided with an outwardly protruding actuating block. The base cover 22 is provided with a clearance groove to provide clearance for the actuating block. A sliding block 23 is slidably disposed on the base cover 22. The sliding block 23 is provided with a constraint groove 26 that matches the actuating block and is arranged at an angle. A sensing plate 28 is provided at the suspension end of the sliding block 23. An external protrusion is provided on the power line. The external protrusion can transmit force to the sensing plate 28 and push the sliding block 23 to move. The constraint groove 26 pushes the actuating block to move closer to the center and makes the wedge block 27 brake and constrain the power line.

[0038] More specifically, a guide rod is provided on the base cover 22, and a guide hole matching the guide rod is provided on the sliding block 23. A control spring for pushing the sliding block 23 to reset is arranged between the base cover 22 and the sliding block 23. After being pushed by the power line, the sliding block 23 will slide along the guide direction of the guide rod and compress the control spring. After the power line removes the force on the sliding block 23, the control spring will push the sliding block 23 to reset.

[0039] See appendix Figure 1 , 2In the embodiment provided in 3, a trigger guide rod is provided on the support base 10 along the direction of motion of the power line, and a lug 24 matching the trigger guide rod is provided on the base plate 21. A traction plate 25 is also slidably matched on the trigger guide rod, and the traction plate 25 can be pushed by the base plate 21 and displaced.

[0040] In another embodiment of the present invention, the traction plate 25 and the base plate 21 are fixed together. When the base plate 21 moves along the direction of the trigger guide rod through the lug 24, the traction plate 25 and the base plate 21 move synchronously.

[0041] After the sensing plate 28 is triggered by the external protrusion on the power line, the sliding block 23 is displaced and the force is transmitted from the constraint groove 26 to the actuating block, so as to drive the wedge block 27 to converge towards the center in the control groove, thereby realizing the braking constraint of the power line by the wedge block 27. It should be noted that the braking of the power line is achieved by the mutual convergence of the two wedge blocks 27. During instantaneous braking, the damage to the power line can be reduced. Moreover, the function of the external step on the power line is to apply a triggering force to the sensing plate 28. The force is not at the external step during braking. This can avoid damage to the power line during instantaneous braking and also avoid the problem that the circuit breaker cannot cut off the circuit when the external step cannot withstand the impact and is damaged.

[0042] From the appendix Figure 1 , 6 As can be seen from the provided embodiments, the traction plate 25 is hinged to the power-off main control 30. When the traction plate 25 is displaced, it can drive the power-off main control 30 to switch from the on state to the off state. The power-off main control 30 is connected to the vacuum switch 40 and causes the vacuum switch 40 to cut off the circuit.

[0043] Specifically, the power-off control unit 30 includes a main control rod 32 hinged to the support base 10 and a drive rod 31 hinged to the traction plate 25. The other end of the drive rod 31 is hinged to the middle position of the main control rod 32. A rocker arm 33 is hinged to the suspended end of the main control rod 32. The other end of the rocker arm 33 is connected to the drive end of the vacuum switch 40. A main control spring for traction and resetting the main control rod 32 is also provided between the main control rod 32 and the support base 10. When the traction plate 25 receives the force of the base plate 21 and undergoes displacement, it will pull the main control rod 32 downward. The movement stroke obtained by the main control rod 32 will be transmitted to the vacuum switch 40 through the rocker arm 33, so that the vacuum switch 40 can quickly cut off the power supply. When the electrician finishes maintenance or needs to reconnect the circuit, the counterweight block 51 is pushed upward. Under the action of the control spring, the power-off control unit will switch from the disconnected state to the connected state, and the base plate 21 will be reset.

[0044] The vacuum switch 40 referred to in this invention is a mature technology and is professional technical knowledge that can be obtained by ordinary technicians. Its internal structure will not be described in detail.

[0045] When the drive element 50 provides power to the power line, it relies on the kinetic energy obtained by free fall motion. For this purpose, the support base 10 is also provided with a lifting element 60 for controlling the drive element 50 to switch between a high position state and a falling state. When the lifting element 60 removes the constraint on the drive element 50, the drive element 50 will switch from a high position state to a free fall state.

[0046] For more details, please see the appendix. Figure 1 , 2 As shown in Figure 7, the lifting element 60 includes a central block 61, with a lifting block 62 and a bending block 63 fixedly connected to both ends of the central block 61. The connection between the central block 61 and the lifting block 62 is rotatably connected to the support base 10. A spindle 64 is arranged at the suspended end of the bending block 63. A positioning groove 52 matching the spindle 64 is provided at the bottom of the counterweight block 51.

[0047] The lifting block 62 is arranged at an angle to the center block 61. The support base 10 is provided with a power element for providing an upward force to the lifting block 62. The power element is preferably a cylinder. In the event of a circuit failure, the cylinder controller is energized and applies an upward force to the lifting block 62, causing the bending block 63, which is arranged at an angle to the center block 61, to deviate from the counterweight block 51, so that the spindle 64 can eliminate the constraint on the positioning groove 52.

[0048] In a more optimized configuration, a roller (not shown in the figure) is rotatably mounted on the spindle 64, and the rotation of the roller can reduce friction during movement.

Claims

1. A high-voltage vacuum circuit breaker, comprising a support base (10), on which an escapement element (20) is disposed, a power line passing through the escapement element (20), and a drive element connected to the drive end of the power line, characterized in that, The drive element can drive the escape element (20) to switch from the disconnected state to the escape line state by applying power to the power line. The power-off control (30) connected to the escape element (20) receives the force of the escape element (20) and switches from the connected state to the disconnected state. The power-off control (30) is connected to the vacuum switch (40) and causes the vacuum switch (40) to cut off the circuit.

2. The high-voltage vacuum circuit breaker according to claim 1, characterized in that, The capture element (20) includes a base plate (21) that slides on the support base (10). A trapezoidal control groove is provided in the base plate (21). Two wedge blocks (27) are slidably arranged in the control groove. A guide surface matching the inclined surface on both sides of the control groove is provided on the wedge blocks (27). The power line passes through the lower edge of the control groove, between the two wedge blocks (27), and is led out from the upper edge of the control groove.

3. The high-voltage vacuum circuit breaker according to claim 2, characterized in that, The driving element (50) is a counterweight (51), which gains kinetic energy during free fall.

4. The high-voltage vacuum circuit breaker according to claim 3, characterized in that, A base cover (22) is fixedly provided on the substrate (21). A toggle block protruding outward is provided on the wedge block (27). A clearance groove is provided on the base cover (22) to provide clearance for the toggle block. A sliding block (23) is slidably provided on the base cover (22). A constraint groove (26) matching the toggle block and arranged at an inclination is provided on the sliding block (23). A sensing plate (28) is provided at the suspension end of the sliding block (23). An external protrusion is provided on the power line. The external protrusion can transmit force to the sensing plate (28) and push the sliding block (23) to move. The constraint groove (26) pushes the toggle block to move closer to the center and makes the wedge block (27) brake and constrain the power line.

5. The high-voltage vacuum circuit breaker according to claim 4, characterized in that, A guide rod is provided on the base cover (22), and a guide hole matching the guide rod is provided on the sliding block (23). A control spring for pushing the sliding block (23) to reset is arranged between the base cover (22) and the sliding block (23). The support base (10) is provided with a trigger guide rod arranged along the direction of motion of the power line, and the base plate (21) is provided with a lug (24) that matches the trigger guide rod. The trigger guide rod is also slidably matched with a traction plate (25). The traction plate (25) can accept the push of the base plate (21) and be displaced.

6. The high-voltage vacuum circuit breaker according to any one of claims 1-5, characterized in that, The support base (10) is provided with a winding element (70) for storing power lines. The winding element (70) includes a central shaft rotatably mounted on the support base (10) and a coiling wheel fixed to the central shaft. The drive end of the central shaft is connected to an external drive component through a transmission assembly. The power provided by the drive component can drive the coiling wheel to rotate and realize the storage of power lines.

7. The high-voltage vacuum circuit breaker according to any one of claims 1-5, characterized in that, The traction plate (25) is hinged to the power-off main control (30). When the traction plate (25) is displaced, it can drive the power-off main control (30) to switch from the on state to the off state.

8. The high-voltage vacuum circuit breaker according to claim 7, characterized in that, The power-off control unit (30) includes a main control rod (32) hinged to the support base (10) and a drive rod (31) hinged to the traction plate (25). The other end of the drive rod (31) is hinged to the middle position of the main control rod (32). A rocker arm (33) is hinged to the suspended end of the main control rod (32). The other end of the rocker arm (33) is connected to the drive end of the vacuum switch (40). A main control spring for traction of the main control rod (32) to reset is also provided between the main control rod (32) and the support base (10).

9. The high-voltage vacuum circuit breaker according to claim 8, characterized in that, The support base (10) is also provided with a lifting element (60) for controlling the switching of the drive element (50) between the high position state and the falling state. When the lifting element (60) removes the constraint on the drive element (50), the drive element (50) will change from the high position state to the free fall state.

10. The high-voltage vacuum circuit breaker according to claim 9, characterized in that, The lifting element (60) includes a center block (61), with a lifting block (62) and a bending block (63) fixedly connected to both ends of the center block. The connection between the center block (61) and the lifting block (62) is rotatably connected to the support base (10). A spindle (64) is arranged at the suspension end of the bending block (63). A positioning groove (52) matching the spindle (64) is provided at the bottom of the counterweight block (51).

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