A primary and secondary fusion pole-mounted circuit breaker

Abstract

The present invention discloses a primary-secondary fusion pole-mounted circuit breaker, belonging to the technical field of circuit breakers. The primary-secondary fusion pole-mounted circuit breaker comprises a circuit breaker body, an extension cavity is provided on the side wall of the circuit breaker body, a knife handle is provided on the side wall of the extension cavity, a rotating rod is provided on the side wall of the knife handle, a rotating block is rotatably connected to the rotating rod, a tool piece is provided on the outside of the rotating block, the rotating rod passes through the side wall of the extension cavity, an insulating cavity is provided inside the circuit breaker body, a plurality of insulating pull rods are fixedly provided on one side wall of the rotating rod located in the insulating cavity, a plurality of vacuum arc chambers are provided in the insulating cavity, and the other end of each insulating pull rod is connected to the movable shaft of the corresponding vacuum arc chamber. The present invention provides a moving ring and supporting mechanisms inside the circuit breaker that automatically cut off the circuit according to vibration, so that in extreme cases, the circuit breaker will cut off the circuit in time, thereby preventing harm to the surrounding people after the power pole is damaged.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit breakers, and in particular relates to a primary-secondary fusion column mounted circuit breaker. Background Art

[0002] A primary / secondary integrated pole-mounted circuit breaker is a device used in 10kV outdoor power distribution systems to disconnect and connect load currents and close short-circuit currents. Primary / secondary integration combines the primary and secondary circuits, with the primary circuit being the main circuit and the secondary circuit controlling the primary circuit. The primary circuit is formed by interconnecting electrical equipment directly involved in the generation, transmission, conversion, and use of electrical energy. The secondary circuit is formed by interconnecting equipment that protects, measures, controls, and meters the primary circuit equipment, following a specific logical relationship.

[0003] One of the core components of this circuit breaker is the vacuum interrupter, which utilizes a porcelain sleeve and metal vacuum seal welding technology. The vacuum within the vacuum interrupter is the primary medium for insulation and arc extinguishing. If the vacuum state within the vacuum interrupter is broken, abnormalities such as disconnection failure and insulation breakdown will occur, affecting the reliable operation of the power system. Leakage failures can be roughly divided into hard failures and soft failures. Hard failures refer to cracked casings or damaged bellows, while soft failures refer to latent failures caused by other reasons. For example, patent publication number CN116959915A discloses a high-voltage vacuum circuit breaker with the function of detecting arc chamber leakage. This function has the ability to detect soft failures such as arc chamber leakage. However, circuit breakers installed in outdoor environments are also prone to hard failures, especially in earthquake zones or areas prone to extreme weather. In such extreme situations, the utility pole where the circuit breaker is located may tilt and break. However, since the circuit breaker does not disconnect the circuit, ordinary people passing near the utility pole may be struck by the current, causing greater harm. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a primary and secondary fusion pole-mounted circuit breaker.

[0005] The technical solutions adopted to solve the above technical problems are:

[0006] A primary-secondary fusion column mounted circuit breaker, comprising a circuit breaker body, an extension cavity being mounted on a side wall of the circuit breaker body, a knife handle being mounted on a side wall of the extension cavity, a rotating rod being mounted on a side wall of the knife handle, a rotating block being rotatably connected to the rotating rod, a tool piece being mounted on the outside of the rotating block, the rotating rod passing through the side wall of the extension cavity, an insulating cavity being defined within the circuit breaker body, a plurality of insulating pull rods being fixedly mounted on a side wall of one end of the rotating rod located in the insulating cavity, a plurality of vacuum interrupter chambers being mounted in the insulating cavity, the other end of each insulating pull rod being connected to a movable shaft of a corresponding vacuum interrupter chamber, two arc-shaped guide plates being fixedly mounted on a side wall of the extension cavity facing the insulating cavity, the two arc-shaped guide plates being respectively located on either side of the rotating rod, and a separation mechanism being mounted between the rotating rod and the extension cavity;

[0007] The upper and lower side walls of the rotating rod are respectively provided with a plurality of wedge blocks, and the height of the wedge blocks near one end of the extension cavity is higher than the height near one end of the insulating cavity. The outer movable sleeve of the rotating rod is provided with a moving ring, and the upper and lower ends of the moving ring are respectively provided with clamping rods, and the clamping rods are abutted against the top of the wedge blocks. Limiting rods are fixedly provided on the side walls of the moving ring, and a guide groove is provided on the side wall of the arc guide plate. The limiting rod is slidably connected to the inner wall of the guide groove. The guide groove is inclined upward near one end of the extension cavity and extends to the outside of the arc guide plate. A pushing mechanism for pushing the moving ring is installed between the moving ring and the side wall of the extension cavity.

[0008] Through the above technical solution, the present invention sets a moving ring and supporting mechanism inside the circuit breaker that automatically cuts off the circuit according to vibration, so that in extreme cases, the circuit breaker can cut off the circuit in time, thereby preventing harm to surrounding people after the electric pole is damaged.

[0009] Furthermore, the clamping rod passes through the side wall of the moving ring, a telescopic spring is wound around the outside of the clamping rod, a baffle is fixedly provided on the side wall of one end of the clamping rod away from the wedge block, one end of the telescopic spring is fixedly connected to the outside of the moving ring, and the other end is fixedly connected to the side wall of the baffle.

[0010] Through the above technical solution, the force applied by the telescopic spring to the baffle and the clamping rod fixed thereon will cause the clamping rod to have a tendency to move toward the center position of the moving circle, thereby ensuring that the clamping rod will always maintain contact with the wedge block, thereby ensuring that the clamping rod and the moving circle can only move toward the extension cavity.

[0011] Furthermore, the separation mechanism includes a bellows, a push plate, a magnetic rod, a rotating shaft and two fixed seats, the bellows is connected to the rotating block, the push plate is fixed to the other end of the bellows, the rotating shaft is rotatably connected to the end of the rotating rod facing the extension cavity, a through hole is provided in the rotating shaft, a card slot is provided at the end of the rotating rod facing the rotating shaft, the magnetic rod is located in the through hole, one end of the magnetic rod is against the push plate, and the other end of the magnetic rod is inserted into the card slot, the two fixed seats are respectively fixed at the upper and lower ends of the rotating shaft, the cross-sections of the two fixed seats are both semicircular, and the inner diameter of the fixed seat is consistent with the outer diameter of the card rod.

[0012] Through the above technical solution, under normal use, since the magnetic rod is in the through-hole and the slot at the same time, the rotating shaft and the rotating rod will be connected together. It can be seen from the attached figure that the magnetic rod is a square rod, so the magnetic rod can drive the rotating shaft and the rotating rod to rotate together. If the magnetic rod leaves the slot and is alone in the through-hole, the magnetic rod will only drive the rotating shaft to rotate, and the fixed seat set on the rotating shaft will also rotate together.

[0013] Furthermore, the tool piece is inserted into the rotating block, and a magnetic piece is provided at one end of the tool piece inserted into the rotating block, and the magnetic piece is magnetically connected to the magnetic rod.

[0014] Through the above technical solution, when the tool piece is inserted into the rotating block, the magnetic rod will be adsorbed into the through hole under the action of magnetic force, so that the rotating shaft and the rotating rod will no longer rotate synchronously. At this time, the rotating shaft can rotate relative to the rotating rod under the action of the rotating block.

[0015] Furthermore, the pushing mechanism includes a rotating disk, a coil spring, a fixed block, a limiting block and two telescopic arc plates, the rotating disk is fixedly connected to the side wall of the rotating rod, the rotating disk is a hollow circular disk, the bellows and the push plate are both located in the hole in the middle of the rotating disk, the coil spring is arranged between the rotating disk and the side wall of the extension cavity, the fixed block is fixedly arranged on the side wall of the extension cavity, the limiting block is fixedly arranged on the side wall of the rotating disk, the limiting block and the side wall of the fixed block are abutted, one end of the two telescopic arc plates are respectively fixedly arranged on the side wall of the rotating disk away from the extension cavity, and the other end of the two telescopic arc plates are respectively fixedly connected to the side wall of the moving ring.

[0016] Through the above technical solution, since one end of the telescopic arc plate is fixedly arranged on the side wall of the moving circle and the other end is fixed on the side wall of the rotating disk, when the moving circle rotates, the telescopic arc plate will also drive the rotating disk to rotate together. In addition, because a coil spring is arranged between the rotating disk and the extension cavity, under the action of the coil spring's own elastic force, the rotating disk and the moving circle tend to restore their initial angles. Therefore, after the moving circle loses its restriction, the coil spring will drive the moving circle and the rotating disk to return to their original angles. The telescopic arc plate also has elastic force, and after losing its restriction, it will also push the moving circle back to its initial position.

[0017] Furthermore, the side walls on both sides of the rotating rod are respectively provided with movement grooves, the movement grooves are open facing one end of the rotating shaft, the inner diameter of the movement groove is consistent with the outer diameter of the clamping rod, the movement grooves are inclined upward away from one end of the rotating shaft, and the upward end of the movement grooves guides to the high part of the wedge block.

[0018] Through the above technical solution, when the rotating shaft drives the fixed seat to rotate together, the clamping rod inside the fixed seat will drive the moving ring to rotate together. When the opening position of the fixed seat is aligned with the moving groove, under the elastic force of the telescopic arc plate, the clamping rod will drive the moving ring to move along the moving groove. Since the moving groove guides the position of the wedge block, the clamping rod will drive the moving ring back to the original state of being against the wedge block.

[0019] Furthermore, the opening of the fixing seat is located opposite to the high portion of the wedge block, the opening of the fixing seat is in close contact with the side wall of the high portion of the wedge block, and the outer diameter of the rotating shaft is smaller than the outer diameter of the rotating rod.

[0020] Through the above technical solution, since the outer diameter of the rotating shaft is small, during the rotation of the fixed seat at the top of the rotating shaft, there is a height difference between the rotating rod and the side in contact with the rotating shaft. Therefore, although the fixed seat is designed to be open at one end facing the rotating rod, the clamping rod located in the fixed seat will not move onto the rotating rod until the opening position of the fixed seat is connected to the motion groove, and then it will move into the motion groove on the side wall of the rotating rod.

[0021] Furthermore, retaining grooves are respectively provided at the upper and lower ends of the through hole, and retaining rods are respectively fixedly connected to the upper and lower side walls of the magnetic rod, and the two retaining rods are respectively located in the two retaining grooves.

[0022] Through the above technical solution, the setting of the retaining groove and the retaining rod is mainly to limit the movement range of the magnetic rod, thereby preventing the magnetic rod from completely detaching from the through hole, thereby improving the stability and usability of the entire mechanism.

[0023] Furthermore, the end of the baffle away from the telescopic spring is designed to be arc-shaped, the side walls of the two arc-shaped guide plates are also designed to be arc-shaped, and the distance between the two arc-shaped guide plates is greater than the outer diameter of the moving ring.

[0024] Through the above technical solution, because the moving ring will rotate under the action of the limit rod, the baffle and the clamping rod may collide with the arc guide plate. Therefore, the edges of the baffle and the arc guide plate are set to be arc-shaped, so that the two can squeeze each other during the rotation process, thereby avoiding affecting the rotation of the moving ring.

[0025] The beneficial effects of the present invention are as follows:

[0026] The present invention provides a motion ring inside the circuit breaker that automatically advances in response to vibrations, as well as a limit rod and arc-shaped guide plate that force the motion ring to rotate. In extreme situations, the motion ring drives the knife handle to rotate, directly mechanically disconnecting the circuit without receiving an electrical signal. This prevents the utility pole on which the circuit breaker is mounted from being damaged and causing harm to nearby residents due to falling wires.

[0027] The present invention provides a rotating shaft and a magnetic rod on the end surface of the rotating rod. Under normal conditions, the magnetic rod is simultaneously located in the slot and the through-hole, so that the rotating shaft and the rotating rod rotate synchronously. When the tool piece is inserted into the rotating block, the magnetic rod is completely attracted to the through-hole under the action of the magnetic force and is no longer located in the slot. At this time, the rotating shaft and the rotating rod no longer rotate synchronously, and the rotating shaft can rotate relative to the rotating rod under the action of the rotating block and the tool piece.

[0028] The present invention provides a motion groove on the side wall of the rotating rod and a fixed seat with an opening on the rotating shaft, so that when the opening of the fixed seat rotates to the opening position of the motion groove, the clamping rod and the motion ring will push the motion ring and the clamping rod to move along the motion groove under the elastic force of the telescopic arc plate, and due to the guidance of the motion groove, the clamping rod will eventually return to the state of contacting and abutting with the wedge block, which is convenient for the next movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 is a schematic diagram of the back of the tool piece and the extension cavity in the present invention;

[0031] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0032] Figure 4 It is a schematic diagram of the structural connection between the rotating disk and the extension cavity in the present invention;

[0033] Figure 5 This is a schematic diagram of the structural connection inside the insulation cavity of the present invention;

[0034] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle;

[0035] Figure 7 It is a schematic diagram of the structural connection between the moving ring and the arc-shaped guide plate in the present invention;

[0036] Figure 8 is a cross-sectional view of the rotating shaft and the rotating rod of the present invention;

[0037] Figure 9 yes Figure 8 A partial enlarged view of point C in the middle;

[0038] Figure 10 It is a structural schematic diagram of the motion circle in the present invention.

[0039] Figure numerals: 1. circuit breaker body; 2. extension chamber; 3. knife handle; 4. rotating rod; 5. rotating block; 6. tool piece; 7. insulating chamber; 8. insulating pull rod; 9. vacuum interrupter; 10. arc guide plate; 11. wedge block; 12. moving ring; 13. clamping rod; 14. limiting rod; 15. guide groove; 16. telescopic spring; 17. baffle; 18. bellows; 19. push plate; 20. magnetic rod; 21. rotating shaft; 22. fixing seat; 23. through hole; 24. clamping slot; 25. magnetic sheet; 26. rotating disk; 27. disc spring; 28. fixing block; 29. limiting block; 30. telescopic arc plate; 31. moving groove; 32. baffle groove; 33. baffle rod. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] like Figure 1 、 Figure 2 and Figure 5 As shown, a primary-secondary fusion column-mounted circuit breaker in this embodiment includes a circuit breaker body 1. An extension cavity 2 is mounted on the side wall of the circuit breaker body 1. A knife handle 3 is mounted on the side wall of the extension cavity 2. A rotating rod 4 is mounted on the side wall of the knife handle 3. A worker can disconnect the circuit by rotating the knife handle 3. A rotating block 5 is rotatably connected to the rotating rod 4. A tool piece 6 is disposed on the outside of the rotating block 5. The rotating rod 4 passes through the side wall of the extension cavity 2. An insulating cavity 7 is defined within the circuit breaker body 1. Several insulating rods 8 are fixedly mounted on the side wall of one end of the rotating rod 4 located in the insulating cavity 7. Several vacuum interrupter chambers 9 are mounted in the insulating cavity 7. The other end of each insulating rod 8 is connected to the movable shaft of the corresponding vacuum interrupter chamber 9.

[0042] Reference Figure 7 and Figure 10It can be seen that a plurality of wedge blocks 11 are respectively provided on the upper and lower side walls of the rotating rod 4. The height of the wedge block 11 near the end of the extension cavity 2 is higher than the height near the end of the insulating cavity 7. The reason for providing multiple wedge blocks 11 is to eliminate the influence of short-term low-intensity vibration on the circuit breaker body 1. If the clamping rod 13 wants to drive the motion ring 12 to move to the end of the wedge block 11, it can only be done if there is continuous high-intensity vibration, because there are many possibilities for low-intensity vibration. If it is not eliminated, it may cause power failure. The outer movable sleeve of the rotating rod 4 is provided with a motion ring 12, and the upper and lower ends of the motion ring 12 are respectively provided with clamping rods 13. The clamping rod 13 The card rod 13 is against the top of the wedge block 11, and passes through the side wall of the movement ring 12. A telescopic spring 16 is wrapped around the outside of the card rod 13. A baffle 17 is fixedly provided on the side wall of the card rod 13 away from the wedge block 11. One end of the telescopic spring 16 is fixedly connected to the outside of the movement ring 12, and the other end is fixedly connected to the side wall of the baffle 17. The force applied by the telescopic spring 16 to the baffle 17 and the card rod 13 fixed thereon will make the card rod 13 tend to move toward the center position of the movement ring 12, thereby ensuring that the card rod 13 will always maintain contact with the wedge block 11, and further ensuring that the card rod 13 and the movement ring 12 can only move toward the extension cavity 2.

[0043] refer to Figure 5 and Figure 6 As shown, the end of the baffle 17 away from the telescopic spring 16 is designed to be arc-shaped, and the side walls of the two arc-shaped guide plates 10 are also designed to be arc-shaped. The distance between the two arc-shaped guide plates 10 is greater than the outer diameter of the moving ring 12. Because the moving ring 12 will rotate under the action of the limit rod 14, the baffle 17 and the clamping rod 13 may collide with the arc-shaped guide plate 10. Therefore, the edges of the baffle 17 and the arc-shaped guide plate 10 are set to be arc-shaped, which facilitates the mutual squeezing of the two during the rotation process, thereby avoiding affecting the rotation of the moving ring 12.

[0044] Apart from Figure 5 and Figure 6 Then, combined with the reference Figure 3 、 Figure 8 as well as Figure 9As shown, two arc-shaped guide plates 10 are fixedly provided on the side wall of the extension cavity 2 facing the insulating cavity 7. The two arc-shaped guide plates 10 are respectively located on both sides of the rotating rod 4. A guide groove 15 is provided on the side wall of the arc-shaped guide plate 10. The arc-shaped guide plate 10 is also provided to facilitate the cooperation with the rotating motion ring 12, thereby ensuring that the limit rod 14 can always contact the guide groove 15 on the side wall of the arc-shaped guide plate 10. The guide grooves 15 located on the side walls of the two arc-shaped guide plates 10 are in completely opposite directions because it is necessary to guide the movement direction of the limit rods 14 on both sides of the motion ring 12. At the same time, both ends of the guide groove 15 are open. The open setting near the end of the extension cavity 2 is to guide the limit rod 14 to leave the restriction of the arc-shaped guide plate 10 after the rotation of the motion ring 12. The open setting near the end of the insulating cavity 7 is also to enable the limit rod 14 to return to the guide groove 15 through the open design of the guide groove 15 when the clamping rod 13 returns to the state of abutting the wedge block 11 along the motion groove 31.

[0045] A separation mechanism is installed between the rotating rod 4 and the extension chamber 2, which includes a bellows 18, a push plate 19, a magnetic rod 20, a rotating shaft 21 and two fixed seats 22. The bellows 18 is connected to the rotating block 5, and the push plate 19 is fixed to the other end of the bellows 18. The rotating shaft 21 is rotatably connected to the end of the rotating rod 4 facing the extension chamber 2. A through-hole 23 is provided in the rotating shaft 21, and a slot 24 is provided at the end of the rotating rod 4 facing the rotating shaft 21. The magnetic rod 20 is located in the through-hole 23. Under normal use, since the magnetic rod 20 is in the through-hole 23 and the slot 24 at the same time, the rotating shaft 21 and the rotating rod 4 will be connected together. Figure 6 - Figure 9 It can be seen that the magnetic rod 20 is a square rod, so the magnetic rod 20 can drive the rotating shaft 21 and the rotating rod 4 to rotate together. If the magnetic rod 20 leaves the slot 24 and is alone in the through-hole 23, the magnetic rod 20 will only drive the rotating shaft 21 to rotate, and the fixed seat 22 set on the rotating shaft 21 will also rotate therewith. The through-hole 23 has retaining grooves 32 at the upper and lower ends respectively, and the upper and lower side walls of the magnetic rod 20 are fixedly connected with retaining rods 33 respectively. The two retaining rods 33 are respectively located in the two retaining grooves 32. The setting of the retaining groove 32 and the retaining rod 33 is mainly to limit the range of motion of the magnetic rod 20, thereby preventing the magnetic rod 20 from completely disengaging from the through-hole 23, thereby improving the stability and ease of use of the entire mechanism.

[0046] One end of the magnetic rod 20 is against the push plate 19, and the other end of the magnetic rod 20 is inserted into the card slot 24. Two fixing seats 22 are fixedly set at the upper and lower ends of the rotating shaft 21 respectively. The cross-sections of the two fixing seats 22 are both semicircular. The inner diameter of the fixing seat 22 is consistent with the outer diameter of the card rod 13. The opening position of the fixing seat 22 is opposite to the wedge block 11. Therefore, after passing the last wedge block 11, the card rod 13 will fall into the fixing seat 22.

[0047] Reference Figure 1 and Figure 2 As shown, the tool piece 6 is inserted into the rotating block 5, and a magnetic piece 25 is provided at one end of the tool piece 6 inserted into the rotating block 5. The magnetic piece 25 is magnetically connected to the magnetic rod 20. When the tool piece 6 is inserted into the rotating block 5, the magnetic rod 20 will be adsorbed into the through hole 23 under the action of the magnetic force, so that the rotating shaft 21 and the rotating rod 4 no longer rotate synchronously. At this time, the rotating shaft 21 can rotate relative to the rotating rod 4 under the action of the rotating block 5.

[0048] Reference Figure 7 As shown, a motion groove 31 is respectively provided on the side walls on both sides of the rotating rod 4. The motion groove 31 is open at one end facing the rotating shaft 21. The inner diameter of the motion groove 31 is consistent with the outer diameter of the clamping rod 13. The motion groove 31 is tilted upward at one end away from the rotating shaft 21. The upward end of the motion groove 31 guides the high part of the wedge block 11. The opening position of the fixed seat 22 is opposite to the high part of the wedge block 11. When the rotating shaft 21 drives the fixed seat 22 to rotate together, the clamping rod 13 inside the fixed seat 22 will drive the motion ring 12 to rotate together. When the opening position of the fixed seat 22 is aligned with the motion groove 31, under the elastic force of the telescopic arc plate 30, the clamping rod 13 will drive the motion ring 12 to move along the motion groove 31. Since the movement groove 31 guides the position of the wedge block 11, the clamping rod 13 will drive the movement ring 12 to return to its original state of being against the wedge block 11. The opening of the fixed seat 22 is in close contact with the side wall of the high part of the wedge block 11. The outer diameter of the rotating shaft 21 is smaller than the outer diameter of the rotating rod 4. Since the outer diameter of the rotating shaft 21 is small, during the rotation of the fixed seat 22 at the top of the rotating shaft 21, there is a height difference between the rotating rod 4 and the contact side of the rotating shaft 21. Therefore, although the fixed seat 22 is designed with an opening at one end facing the rotating rod 4, the clamping rod 13 located in the fixed seat 22 will not move onto the rotating rod 4 until the opening position of the fixed seat 22 is connected with the movement groove 31, and then it will move into the movement groove 31 on the side wall of the rotating rod 4.

[0049] In addition to reference Figure 7 , combined with reference Figure 4 - Figure 6As shown, the side walls on both sides of the moving ring 12 are respectively fixed with limit rods 14, and the limit rods 14 are slidably connected to the inner wall of the guide groove 15. The guide groove 15 is inclined upward near one end of the extension cavity 2 and extends to the outside of the arc-shaped guide plate 10. A pushing mechanism for pushing the moving ring 12 is arranged between the moving ring 12 and the side wall of the extension cavity 2. The pushing mechanism includes a rotating disk 26, a coil spring 27, a fixed block 28, a limit block 29 and two telescopic arc plates 30. The rotating disk 26 is fixedly connected to the side wall of the rotating rod 4. The rotating disk 26 is a hollow disk. The bellows 18 and the push plate 19 are both located in the hole in the middle of the rotating disk 26. The coil spring 27 is arranged between the rotating disk 26 and the side wall of the extension cavity 2. The fixed block 28 is fixedly arranged on the side wall of the extension cavity 2. The limit block 29 is fixedly arranged on the side wall of the rotating disk 26. The limit block 29 is against the side wall of the fixed block 28. One end of the two telescopic arc plates 30 is respectively fixedly provided on the side wall of the rotating disk 26 away from the extension chamber 2, and the other end of the two telescopic arc plates 30 is respectively fixedly connected to the side wall of the moving ring 12. Since one end of the telescopic arc plate 30 is fixedly provided on the side wall of the moving ring 12 and the other end is fixed on the side wall of the rotating disk 26, when the moving ring 12 rotates, the telescopic arc plate 30 will also drive the rotating disk 26 to rotate together. Because a coil spring 27 is provided between the rotating disk 26 and the extension chamber 2, under the action of the coil spring 27's own elastic force, the rotating disk 26 and the moving ring 12 tend to restore their initial angles. Therefore, after the moving ring 12 loses its restriction, the coil spring 27 will drive the moving ring 12 and the rotating disk 26 to return to their original angles. Since the telescopic arc plate 30 also has elastic force, it will also push the moving ring 12 back to its initial position after losing its restriction.

[0050] The working principle of this embodiment is as follows: when continuous and strong vibration occurs, the moving ring 12 is restricted in position by the arc-shaped guide plates 10 on both sides, so the moving ring 12 can only move along the rotating rod 4. Because the clamping rod 13 contacts the wedge block 11 provided on the rotating rod 4, the clamping rod 13 can only drive the moving ring 12 step by step toward the extension cavity 2. During the movement of the moving ring 12 along the rotating rod 4, the limiting rod 14 on the side wall of the moving ring 12 moves along the guide groove 15 on the side wall of the arc-shaped guide plate 10, so that the moving ring 12 can move steadily in a straight line until the clamping rod 13 passes the last wedge block 11 and falls into the fixed seat 22. Under the action of vibration, the limiting rod 14 continues to move along the guide groove 15 due to inertia, thereby driving the moving ring 12 to rotate together with the rotating rod 4. The insulating pull rod 8 provided on the rotating rod 4 drives the vacuum interrupter 9 to open.

[0051] During the transportation of the circuit breaker body 1, the circuit breaker body 1 placed in the carriage may also encounter continuous high-intensity vibration. Therefore, before installation, the staff needs to first rotate the switch handle 3 to make the rotating rod 4 return to the initial position, and then the tool piece 6 can be inserted into the rotating block 5. The magnetic piece 25 at the end of the tool piece 6 will attract the magnetic rod 20, so that the magnetic rod 20 leaves the slot 24. At this time, the staff rotates the tool piece 6, which will cause the rotating block 5 and the rotating shaft 21 to rotate together, and the clamping rod 13 stuck in the fixed seat 22 will also rotate along until the moving slot 31 is connected to the opening of the fixed seat 22. Under the elastic force of the telescopic arc plate 30, the clamping rod 13 and the moving ring 12 will move along the moving slot 31. Due to the upward inclination of the moving slot 31, the clamping rod 13 will eventually drive the moving ring 12 back to the state of abutting against the wedge block 11, making it convenient to cut off the circuit when encountering continuous high-intensity vibration next time.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A primary-secondary fusion column mounted circuit breaker, comprising a circuit breaker body (1), an extension cavity (2) being mounted on a side wall of the circuit breaker body (1), a knife handle (3) being mounted on a side wall of the extension cavity (2), and characterized in that: The side wall of the knife handle (3) is provided with a rotating rod (4), a rotating block (5) is rotatably connected inside the rotating rod (4), a tool piece (6) is provided outside the rotating block (5), the rotating rod (4) passes through the side wall of the extension cavity (2), an insulating cavity (7) is provided inside the circuit breaker body (1), the rotating rod (4) is located in the insulating cavity (7), and a plurality of insulating pull rods (8) are fixedly provided on one end side wall thereof, a plurality of vacuum arc extinguishing chambers (9) are provided in the insulating cavity (7), and the other end of each insulating pull rod (8) is connected to the movable shaft of the corresponding vacuum arc extinguishing chamber (9), two arc guide plates (10) are fixedly provided on the side wall of the extension cavity (2) facing the insulating cavity (7), and the two arc guide plates (10) are respectively located on both sides of the rotating rod (4), and a separation mechanism is provided between the rotating rod (4) and the extension cavity (2); The upper and lower side walls of the rotating rod (4) are respectively provided with a plurality of wedge blocks (11), the height of the wedge blocks (11) near one end of the extension cavity (2) is higher than the height near one end of the insulating cavity (7), the outer movable sleeve of the rotating rod (4) is provided with a moving ring (12), the upper and lower ends of the moving ring (12) are respectively provided with clamping rods (13), the clamping rods (13) and the top of the wedge blocks (11) are pressed against each other, and the side walls of the moving ring (12) are respectively fixed with limiting rods (14), the side walls of the arc guide plate (10) are provided with guide grooves (15), the limiting rods (14) are slidably connected to the inner wall of the guide grooves (15), the guide grooves (15) are inclined upward near one end of the extension cavity (2) and extend to the outside of the arc guide plate (10), and a pushing mechanism for pushing the moving ring (12) is arranged between the moving ring (12) and the side walls of the extension cavity (2).

2. The primary and secondary fusion column mounted circuit breaker according to claim 1, characterized in that: The clamping rod (13) passes through the side wall of the moving ring (12), and a telescopic spring (16) is wound around the outside of the clamping rod (13). A baffle (17) is fixedly provided on the side wall of one end of the clamping rod (13) away from the wedge block (11). One end of the telescopic spring (16) is fixedly connected to the outside of the moving ring (12), and the other end is fixedly connected to the side wall of the baffle (17).

3. The primary and secondary fusion column mounted circuit breaker according to claim 1, characterized in that: The separation mechanism includes a bellows (18), a push plate (19), a magnetic rod (20), a rotating shaft (21) and two fixed seats (22), wherein the bellows (18) is connected to the rotating block (5), the push plate (19) is fixed to the other end of the bellows (18), the rotating shaft (21) is rotatably connected to the end of the rotating rod (4) facing the extension cavity (2), a through hole (23) is provided in the rotating shaft (21), and a card slot (24) is provided at the end of the rotating rod (4) facing the rotating shaft (21), the magnetic rod (20) is located in the through hole (23), one end of the magnetic rod (20) is pressed against the push plate (19), and the other end of the magnetic rod (20) is inserted into the card slot (24), and the two fixed seats (22) are respectively fixedly arranged at the upper and lower ends of the rotating shaft (21), and the cross sections of the two fixed seats (22) are both semicircular, and the inner diameter of the fixed seat (22) is consistent with the outer diameter of the card rod (13).

4. The primary and secondary fusion column mounted circuit breaker according to claim 3, characterized in that: The tool piece (6) is inserted into the rotating block (5), and a magnetic piece (25) is provided at one end of the tool piece (6) inserted into the rotating block (5), and the magnetic piece (25) is magnetically connected to the magnetic rod (20).

5. The primary and secondary fusion column mounted circuit breaker according to claim 3, characterized in that: The pushing mechanism includes a rotating disk (26), a coil spring (27), a fixed block (28), a limiting block (29) and two telescopic arc plates (30), wherein the rotating disk (26) is fixedly connected to the side wall of the rotating rod (4), the rotating disk (26) is a hollow disk, the bellows (18) and the push plate (19) are both located in a hole in the middle of the rotating disk (26), the coil spring (27) is arranged between the rotating disk (26) and the side wall of the extension cavity (2), the fixed block (28) is fixedly arranged on the side wall of the extension cavity (2), the limiting block (29) is fixedly arranged on the side wall of the rotating disk (26), the limiting block (29) and the side wall of the fixed block (28) are abutted against each other, one end of the two telescopic arc plates (30) are respectively fixedly arranged on the side wall of the rotating disk (26) away from the extension cavity (2), and the other end of the two telescopic arc plates (30) are respectively fixedly connected to the side wall of the moving ring (12).

6. The primary and secondary fusion column mounted circuit breaker according to claim 3, characterized in that: The side walls on both sides of the rotating rod (4) are respectively provided with a motion groove (31), the end of the motion groove (31) facing the rotating shaft (21) is open, the inner diameter of the motion groove (31) is consistent with the outer diameter of the clamping rod (13), the end of the motion groove (31) away from the rotating shaft (21) is inclined upward, and the upward end of the motion groove (31) is guided to the high part of the wedge block (11).

7. The primary and secondary fusion column mounted circuit breaker according to claim 3, characterized in that: The opening of the fixing seat (22) is located opposite to the upper portion of the wedge-shaped block (11), the opening of the fixing seat (22) is in close contact with the side wall of the upper portion of the wedge-shaped block (11), and the outer diameter of the rotating shaft (21) is smaller than the outer diameter of the rotating rod (4).

8. The primary and secondary fusion column mounted circuit breaker according to claim 3, characterized in that: The through hole (23) is provided with retaining grooves (32) at the upper and lower ends respectively. The upper and lower side walls of the magnetic rod (20) are fixedly connected with retaining rods (33) respectively. The two retaining rods (33) are respectively located in the two retaining grooves (32).

9. The primary and secondary fusion column mounted circuit breaker according to claim 2, characterized in that: The end of the baffle (17) away from the telescopic spring (16) is designed to be arc-shaped, the side walls of the two arc-shaped guide plates (10) are also designed to be arc-shaped, and the distance between the two arc-shaped guide plates (10) is greater than the outer diameter of the moving ring (12).

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