Integrated sealed primary and secondary fused pole-mounted circuit breaker

Abstract

The application discloses an integrated sealed primary and secondary fusion pole-mounted circuit breaker in the technical field of circuit breakers, which comprises a case, a push-pull mechanism, a first elastic mechanism and a second elastic mechanism, a circuit breaker main body for connecting a power grid is fixedly installed outside the case, a plurality of groups of insulation pull rods extending to the inside of the circuit breaker main body are slidably installed inside the case, the push-pull mechanism is rotatably installed in the plurality of groups of supports inside the case, the top end of the push-pull mechanism is fixedly connected with the bottom end of the insulation pull rod, the two groups of first elastic mechanisms connecting the push-pull mechanism are symmetrically installed on the two sides of the support, and the application solves the problems that the speed of the moving contact block in the existing circuit breaker cannot be effectively buffered when the moving contact block quickly approaches or moves away from the static contact block, the elastic mechanism in the circuit breaker is inconvenient for the energy storage and release pressure of the closing spring and the opening spring, and the operation efficiency, reliability, synchronism and arc extinguishing performance of the circuit breaker cannot be improved.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, specifically to an integrated sealed primary and secondary combined pole-mounted circuit breaker. Background Technology

[0002] Pole-mounted circuit breakers play a crucial role in power distribution networks, effectively controlling and protecting the lines to ensure the reliability and security of power supply. With the development of smart grids, integrated primary and secondary pole-mounted circuit breakers are gradually becoming key equipment in distribution networks. They integrate traditional primary equipment (such as the circuit breaker itself) and secondary equipment (such as protection, measurement, and control units), enabling more precise monitoring and control of the distribution network.

[0003] In existing primary and secondary integrated pole-mounted circuit breakers, the opening and closing operations are often performed using only a single elastic mechanism. This results in the moving contact block within the circuit breaker not receiving effective buffering and propulsion when rapidly approaching or moving away from the stationary contact block. This is detrimental to reducing contact wear, improving closing reliability, and optimizing arc-extinguishing performance. Furthermore, the elastic mechanism within the circuit breaker is not conducive to efficiently synchronizing the energy storage and pressure release of the closing and opening springs, which is not conducive to improving the operating efficiency, reliability, and synchronization of the circuit breaker. Therefore, those skilled in the art have provided an integrated sealed primary and secondary integrated pole-mounted circuit breaker to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated sealed primary and secondary fusion pole-mounted circuit breaker to solve the problems of the ineffective buffering of the speed of the moving contact block when it rapidly approaches or moves away from the stationary contact block in the existing circuit breaker, and the inconvenience of the elastic mechanism in the circuit breaker in storing and releasing the pressure of the closing spring and opening spring in a high-efficiency synchronous manner, which is not conducive to improving the operating efficiency, reliability, synchronization and arc extinguishing performance of the circuit breaker.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated sealed primary and secondary fusion pole-mounted circuit breaker, comprising:

[0006] The chassis has a circuit breaker body for connecting to the power grid fixedly installed on its exterior, and multiple sets of insulating pull rods extending into the circuit breaker body are slidably installed inside the chassis.

[0007] The push-pull mechanism is rotatably installed inside multiple sets of brackets fixedly installed inside the chassis, and the top end of the push-pull mechanism is fixedly connected to the bottom end of the insulating pull rod.

[0008] The first elastic mechanism is provided with two sets of first elastic mechanisms connected to the push-pull mechanism symmetrically installed on both sides of the bracket. The bracket has rotating parts on both sides for limiting the position of the first elastic mechanism. The rotating parts can be positioned by the first elastic mechanism when the push-pull mechanism moves to the end of its stroke.

[0009] The second elastic mechanism is installed inside the bracket and is connected to the push-pull mechanism. When the push-pull mechanism drives the insulating rod to move to adjust the closing and opening state of the circuit breaker, the first elastic mechanism and the second elastic mechanism switch between free state and energy storage state in a coordinated manner.

[0010] As a further description of the above technical solution: the push-pull mechanism includes two sets of symmetrical first connecting rods inside the rotating mounting bracket, a push rod is fixedly installed between the top ends of the two sets of first connecting rods, and the middle part of the push rod is connected to the bottom end of the insulating pull rod through a rotatingly installed second connecting rod.

[0011] As a further description of the above technical solution: the second elastic mechanism includes a bottom frame rod fixedly installed inside the bracket and a top frame rod fixedly installed between two sets of first connecting rods, and a first spring is installed between the bottom frame rod and the top frame rod.

[0012] As a further description of the above technical solution: multiple sets of parallel first springs are installed between the top frame rods, and multiple sets of parallel baffles are installed on the surfaces of the top frame rods and the top frame rods, with the ends of the first springs installed between two adjacent sets of baffles.

[0013] As a further description of the above technical solution: the first elastic mechanism includes a support seat fixedly installed on the side of the bracket, a ring that slides through the cross sleeve is fixedly installed on the support seat, a second spring sleeved on the outer ring of the ring is installed between the end of the cross sleeve and the support seat, one end of the cross sleeve is fixedly connected to the side of the first connecting rod, and the end of the cross sleeve away from the first connecting rod abuts against the rotating component.

[0014] As a further description of the above technical solution: a second spring is installed between both ends of the cross sleeve and both ends of the support base, and is sleeved on the outer ring of the circular ring.

[0015] As a further description of the above technical solution: the rotating component includes a rotating rod rotatably connected to the side of the bracket, a rotating ring fixedly installed on the rotating rod, and a retractable V-shaped component at both ends for limiting the displacement of the cross sleeve. A drive component for controlling the synchronous rotation of the rotating rings on both sides is slidably installed inside the chassis.

[0016] As a further description of the above technical solution: the V-shaped component includes two sets of support plates fixedly installed on the rotating ring, and hydraulic rods are fixedly installed on the inner side of both sets of support plates, wherein the output end side of one set of hydraulic rods abuts against the outer ring of the cross sleeve.

[0017] As a further description of the above technical solution: the driving component includes a rectangular frame that is slidably installed inside the chassis. The top of the rectangular frame is provided with two sets of parallel racks. The outer ring of the rotating ring is provided with a toothed ring that meshes with the racks. A servo motor is fixedly installed on the bracket. A turntable is fixedly installed on the output shaft of the servo motor. The bottom of the turntable is connected to the rectangular frame through a rocker arm that is rotatably connected.

[0018] As a further description of the above technical solution: lifting rings are welded at the four corners of the top of the chassis, and outward-folding mounting plates are provided on both sides of the bottom of the chassis.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] When the circuit breaker closes, the moving contact quickly approaches the stationary contact and then slowly contacts it, reducing arc generation and mechanical impact. When the circuit breaker opens, the moving contact quickly separates and then slowly disconnects, preventing arc reignition and contact damage. This unique motion control mechanism significantly improves the arc extinguishing performance and contact life of the circuit breaker. The first and second elastic mechanisms alternately store and release energy during closing and opening, achieving efficient energy utilization, reducing energy storage requirements, and simplifying the design of the energy storage mechanism. The stable boosting function of the rotating parts ensures smooth speed of contact and separation between the moving and stationary contacts, reducing mechanical impact and arc faults, and improving the stability and reliability of the circuit breaker. The optimized motion control and energy utilization mechanism reduces fatigue accumulation of mechanical parts and contact wear, extends the service life of the equipment, and reduces maintenance frequency and costs. Attached Figure Description

[0021] Figure 1 This is a first schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a second schematic diagram of the overall structure of the present invention;

[0023] Figure 3 This is a first sectional view of the chassis structure of the present invention;

[0024] Figure 4 This is a second sectional view of the chassis structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the bracket, push-pull mechanism, first spring mechanism, rotating component and second spring mechanism of the present invention;

[0026] Figure 6 This is a side view of the structure of the bracket, push-pull mechanism, first spring mechanism, rotating component and second spring mechanism of the present invention;

[0027] Figure 7 This is a bottom view of the structure of the bracket, push-pull mechanism, first spring mechanism, rotating component and second spring mechanism of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the bracket, push-pull mechanism, first spring mechanism and second spring mechanism of the present invention.

[0029] Legend:

[0030] 10. Chassis; 11. Circuit breaker body; 12. Insulating tie rod; 13. Bracket; 14. Baffle; 15. Lifting ring; 16. Mounting plate;

[0031] 20. Push-pull mechanism; 201. First link; 202. Push rod; 203. Second link;

[0032] 30. First elastic mechanism; 301. Support base; 302. Cross sleeve; 303. Ring; 304. Second spring;

[0033] 40. Rotating component; 401. Rotating rod; 402. Rotating ring; 403. V-shaped component; 4031. Support plate; 4032. Hydraulic rod; 404. Driving component; 4041. Rectangular frame; 4042. Rack; 4043. Gear ring; 4044. Servo motor; 4045. Turntable; 4046. Rocker arm;

[0034] 50. Second elastic mechanism; 501. Bottom support rod; 502. Top support rod; 503. First spring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1 to 8In this embodiment of the invention, the integrated sealed primary and secondary fusion pole-mounted circuit breaker includes a chassis 10, a push-pull mechanism 20, a first elastic mechanism 30, and a second elastic mechanism 50. The circuit breaker body 11 for connecting to the power grid is fixedly installed on the outside of the chassis 10. Multiple sets of insulating pull rods 12 extending into the circuit breaker body 11 are slidably installed inside the chassis 10. The push-pull mechanism 20 is fixedly installed inside multiple sets of brackets 13 inside the chassis 10, and the top end of the push-pull mechanism 20 is fixedly connected to the bottom end of the insulating pull rod 12.

[0037] The poles of the primary and secondary integrated pole-mounted circuit breakers typically adopt a multi-cavity deep integrated pole design, which integrates components such as vacuum interrupters, current sensors, and voltage sensors into a sealed package. This effectively improves the insulation performance and reliability of the circuit breaker. The pole has a vacuum interrupter inside that provides space for closing and opening operations. The moving contact of the insulating pull rod 12 connected inside the vacuum interrupter contacts the stationary contact to achieve closing, and the moving and stationary contacts separate to achieve opening. The spring operating mechanism inside the chassis 10 is used to control the movement of the insulating pull rod 12 and its connecting components. The incoming and outgoing terminals on the circuit breaker body 11 are used to connect to the power grid circuit. The other essential components of the circuit breaker mentioned above are all existing mature technologies and will not be described in detail here.

[0038] The spring operating mechanism of this technical solution is as follows: two sets of first elastic mechanisms 30 connected to the push-pull mechanism 20 are symmetrically installed on both sides of the bracket 13. Rotating parts 40 are provided on both sides of the bracket 13 to limit the position of the first elastic mechanism 30. The rotating parts 40 can be positioned by the first elastic mechanism 30 when the push-pull mechanism 20 moves to the end of its stroke. The second elastic mechanism 50 connected to the push-pull mechanism 20 is installed inside the bracket 13. When the push-pull mechanism 20 drives the insulating rod 12 to move to adjust the closing and opening state of the circuit breaker, the first elastic mechanism 30 and the second elastic mechanism 50 are linked to exchange between the free state and the energy storage state. Specifically, when the push-pull mechanism 20 drives the insulating rod 12 to the closed state of the circuit breaker, the first elastic mechanism 30 is in the fully energy storage state and the second elastic mechanism 50 is in the free state. When the push-pull mechanism 20 drives the insulating rod 12 to the open state of the circuit breaker, the second elastic mechanism 50 is in the fully energy storage state and the first elastic mechanism 30 is in the free state.

[0039] When the primary and secondary fusion pole-mounted circuit breaker performs a closing operation, the rotating component 40 is activated. The rotating component 40 first removes the upper limit support of the first elastic mechanism 30, and then the rotating component 40 rotates. After the upper limit support of the first elastic mechanism 30 is removed, the elastic force generated by the energy stored in the first elastic mechanism 30 can drive the push-pull mechanism 20 to move quickly. During the movement of the push-pull mechanism 20, the second elastic mechanism 50 can be compressed to store energy. During the stroke of the first elastic mechanism 30 driving the insulating pull rod 12 through the push-pull mechanism 20, the first elastic mechanism 30 stores elastic potential energy when it is compressed. When the pressure is released, the compressed elastic component will try to return to its free length, thereby generating a boosting force on the movement of the push-pull mechanism 20. The free elastic component of the second elastic mechanism 50 is not compressed or stretched in its initial state, so it does not store energy in its initial state and does not generate additional force. Conversely, when performing a tripping operation, the movement states of the first elastic mechanism 30 and the second elastic mechanism 50 are interchanged.

[0040] Therefore, when the insulating pull rod 12 and the moving contact block at its end, which are controlled by the first elastic mechanism 30 and the second elastic mechanism 50, are in the closing motion, the moving contact block can quickly approach the stationary contact block in the initial movement. As the elastic force of the first elastic mechanism 30 decreases and the elastic force of the second elastic mechanism 50 increases, the speed of the moving contact block in the area approaching the stationary contact block will gradually decrease. When the moving contact block decelerates in the area approaching the moving contact block, the rotating member 40 can stabilize the speed and push the first elastic mechanism 30 to control the contact between the moving contact block and the stationary contact block. Conversely, when the opening motion is in the opening motion, the moving contact block can quickly move away from the stationary contact block in the initial movement. When the moving contact block and the stationary contact block are about to be completely separated, the rotating member 40 can stabilize the speed and push the moving contact block to separate from the stationary contact block.

[0041] When closing an integrated sealed primary and secondary fusion pole-mounted circuit breaker: rapid approach can shorten the distance between the moving and stationary contacts, reducing the chance of arc generation; slow approach can avoid strong impact caused by excessive speed, thereby reducing the intensity and duration of the arc; slow approach can reduce mechanical impact between contacts, avoiding contact wear and deformation caused by impact; slow approach can also ensure more stable contact between contacts, avoiding poor contact caused by excessive speed.

[0042] When the integrated sealed primary and secondary fusion pole-mounted circuit breaker is tripped: rapid separation can quickly open the contacts, reducing the arc formation time; slow disconnection can avoid arc reignition caused by excessive speed, ensuring that the arc can be extinguished steadily; slow disconnection can reduce arc erosion between contacts, avoiding contact damage caused by arc; rapid separation can ensure that the moving contact and stationary contact can be separated quickly, reducing faults caused by incomplete separation.

[0043] Meanwhile, the first elastic mechanism 30 and the second elastic mechanism 50 alternately store and release energy during the closing and opening processes, achieving efficient energy utilization. Furthermore, when one set of elastic mechanisms is in the energy storage state, the other set of elastic mechanisms is in the free state, which also helps to improve the actual service life of the elastic components of the elastic mechanism.

[0044] In one embodiment, see Figures 1 to 8 Specifically, the push-pull mechanism 20 includes two sets of symmetrical first connecting rods 201 inside the rotating mounting bracket 13. A push rod 202 is fixedly installed between the top ends of the two sets of first connecting rods 201. The middle part of the push rod 202 is connected to the bottom end of the insulating pull rod 12 through a rotating second connecting rod 203. The first elastic mechanism 30, which is controlled to move by the rotating component 40, can drive the first connecting rod 201 to rotate. The two sets of rotating first connecting rods 201 can drive the push rod 202 to rotate. The push rod 202 can drive the insulating pull rod 12 to move up and down through the second connecting rod 203. The end of the second connecting rod 203 can be hinged to the bottom end of the insulating pull rod 12 and rotatably connected to the outside of the push rod 202 through a bearing. At the same time, the moving first connecting rod 201 can also drive the second elastic mechanism 50 to store energy.

[0045] Correspondingly, the second elastic mechanism 50 includes a bottom support rod 501 fixedly installed inside the bracket 13 and a top support rod 502 fixedly installed between two sets of first connecting rods 201. A first spring 503 is installed between the bottom support rod 501 and the top support rod 502. Furthermore, multiple sets of parallel first springs 503 are installed between the top support rod 502 and the bottom support rod 501. Multiple sets of parallel baffles 14 are installed on the surfaces of both the top support rod 502 and the bottom support rod 501. The ends of the first springs 503 are installed between two adjacent sets of baffles 14.

[0046] The bottom support rod 501 provides a stable bottom support for the first spring 503. The two sets of rotating first connecting rods 201 can drive the first spring 503 to extend and retract to store energy through the top support rod 502. Multiple sets of first springs 503 can provide a stable and strong elastic force for driving the first connecting rods 201. There are also baffles 14 that separate multiple first springs 503, which can facilitate the stable individual extension and retraction of multiple sets of first springs 503, thereby ensuring the normal operation of the equipment.

[0047] Correspondingly, the first elastic mechanism 30 includes a support seat 301 fixedly installed on the side of the bracket 13. A ring 303 that slides through the cross sleeve 302 is fixedly installed on the support seat 301. A second spring 304 sleeved on the outer ring of the ring 303 is installed between the end of the cross sleeve 302 and the support seat 301. One end of the cross sleeve 302 is fixedly connected to the side of the first connecting rod 201, and the end of the cross sleeve 302 away from the first connecting rod 201 abuts against the rotating member 40. Furthermore, a second spring 304 sleeved on the outer ring of the ring 303 is installed between both ends of the cross sleeve 302 and both ends of the support seat 301.

[0048] The support base 301 can provide corresponding support for the second spring 304 and the ring 303. The elastic force of the second spring 304 can control the cross sleeve 302 to slide on the ring 303. The cross sleeve 302 can drive the first connecting rod 201 to rotate or the cross sleeve 302 can rotate with the first connecting rod 201. The two sets of second springs 304 can extend and retract to efficiently store energy.

[0049] Based on the above embodiments, see [link to relevant documentation] Figures 1 to 8 Specifically, the rotating component 40 includes a rotating rod 401 rotatably connected to the side of the bracket 13. A rotating ring 402 is fixedly installed on the rotating rod 401. The rotating ring 402 is provided with retractable V-shaped parts 403 at both ends for limiting the displacement of the cross sleeve 302. A driving component 404 for controlling the synchronous rotation of the two rotating rings 402 is slidably installed inside the housing 10. The V-shaped part 403 includes two sets of support plates 4031 fixedly installed on the rotating ring 402. Hydraulic rods 4032 are fixedly installed on the inner side of both sets of support plates 4031. The output end side of one set of hydraulic rods 4032 abuts against the outer ring of the cross sleeve 302.

[0050] The operation of the drive component 404 controls the rotation of the rotating ring 402. The rotation of the rotating ring 402 drives the rotating rod 401 to rotate. The rotating rod 401 can provide corresponding rotational support for the rotating ring 402. At the same time, the rotating ring 402 can drive the connected V-shaped component 403 to rotate during the rotation. The two ends of the V-shaped component 403 can provide stable limiting support for the cross sleeve 302 when the moving contact block at the top of the insulating pull rod 12 moves to the closing or opening limit state. Before the drive component 404 operates, the V-shaped component 403 retracts from the end of the cross sleeve 302. The cross sleeve 302 is pushed by the spring to quickly move on the ring 303. The other end of the V-shaped component 403 follows the rotation of the drive component 404 and can approach the cross sleeve 302 when the cross sleeve 302 is slowly decelerated by the two sets of springs. Thus, the rotating component 40 provides stable propulsion for the moving contact block at the top of the insulating pull rod 12 at the end of the stroke.

[0051] V-shaped component 403 has two sets of hydraulic rods 4032, and is equipped with hydraulic rods 4032 that provide stable support for the hydraulic rods 4032. The extension and retraction of the hydraulic rods 4032 can be remotely operated by controlling the electrical equipment. When the hydraulic rods 4032 retract, it is easy to release the energy stored in the elastic component. When the hydraulic rods 4032 extend and follow the rotation of the drive component 404, they can provide a stable boosting force when the insulating pull rod 12 moves to near the limit position. V-shaped component 403 can also be a telescopic rod controlled by an electromagnet structure.

[0052] In detail, the drive component 404 includes a rectangular frame 4041 that is slidably installed inside the chassis 10. The top of the rectangular frame 4041 is provided with two sets of parallel racks 4042. The outer ring of the rotating ring 402 is provided with a gear ring 4043 that meshes with the racks 4042. A servo motor 4044 is fixedly installed on the bracket 13. A turntable 4045 is fixedly installed on the output shaft of the servo motor 4044. The shaft can movably pass through the bottom plate of the bracket 13. The bottom of the turntable 4045 is connected to the rectangular frame 4041 through a rocker arm 4046 that is rotatably connected. Both ends of the rocker arm 4046 can be hinged to the components to achieve a rotatable connection.

[0053] The servo motor 4044 is started, and the servo motor 4044 can drive the turntable 4045 to rotate through its output shaft. The turntable 4045 can push and pull the rectangular frame 4041 to slide through the rocker arm 4046 connected to its bottom. The housing 10 is provided with a slide rail to support the sliding of multiple sets of rectangular frames 4041. The moving rectangular frame 4041 can drive the gear ring 4043 to rotate through the rack 4042. The gear ring 4043 is used to drive the rotating ring 402 connected to it to rotate with the rotating rod 401 as support. The rotating ring 402 can control the displacement of the cross sleeve 302 through the V-shaped part 403.

[0054] The integrated sealed primary and secondary fusion pole-mounted circuit breaker also includes lifting rings 15 welded at the four corners of the top of the chassis 10 to facilitate the transfer of work hoisting equipment. Both sides of the bottom of the chassis 10 are provided with outward-folding mounting plates 16, which can facilitate the assembly of the equipment onto the power grid positioning frame that needs to be erected. The circuit breaker also includes external opening and closing knowledge structures.

[0055] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0056] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated sealed primary and secondary combined pole-mounted circuit breaker, characterized in that, include: The chassis (10) has a circuit breaker body (11) for connecting to the power grid fixedly installed on its exterior. Multiple sets of insulating pull rods (12) extending into the circuit breaker body (11) are slidably installed inside the chassis (10). The push-pull mechanism (20) is rotatably installed inside multiple sets of brackets (13) fixedly installed inside the chassis (10). The top end of the push-pull mechanism (20) is fixedly connected to the bottom end of the insulating pull rod (12). The first elastic mechanism (30) is provided on both sides of the bracket (13) with two sets of first elastic mechanisms (30) connected to the push-pull mechanism (20). The bracket (13) has rotating parts (40) on both sides for limiting the position of the first elastic mechanism (30). The rotating parts (40) can be positioned by the first elastic mechanism (30) when the push-pull mechanism (20) moves to the end of its stroke. The second elastic mechanism (50) is installed inside the bracket (13) and is connected to the push-pull mechanism (20). When the push-pull mechanism (20) drives the insulating pull rod (12) to move to adjust the circuit breaker's closing and opening states, the first elastic mechanism (30) and the second elastic mechanism (50) perform a linkage exchange between the free state and the energy storage state. The push-pull mechanism (20) includes two sets of symmetrical first connecting rods (201) inside the rotating mounting bracket (13). A push rod (202) is fixedly installed between the top ends of the two sets of first connecting rods (201). The middle part of the push rod (202) is connected to the bottom end of the insulating pull rod (12) through a rotating second connecting rod (203). The first elastic mechanism (30) includes a support seat (301) fixedly installed on the side of the bracket (13). A ring (303) that slides through the cross sleeve (302) is fixedly installed on the support seat (301). A second spring (304) sleeved on the outer ring of the ring (303) is installed between the end of the cross sleeve (302) and the support seat (301). One end of the cross sleeve (302) is fixedly connected to the side of the first connecting rod (201), and the end of the cross sleeve (302) away from the first connecting rod (201) abuts against the rotating part (40). The rotating component (40) includes a rotating rod (401) rotatably connected to the side of the bracket (13). A rotating ring (402) is fixedly installed on the rotating rod (401). The rotating ring (402) is provided with retractable V-shaped parts (403) at both ends for limiting the displacement of the cross sleeve (302). A driving component (404) for controlling the synchronous rotation of the rotating rings (402) on both sides is slidably installed inside the housing (10).

2. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 1, characterized in that: The second elastic mechanism (50) includes a bottom support rod (501) fixedly installed inside the bracket (13) and a top support rod (502) fixedly installed between two sets of first connecting rods (201), and a first spring (503) is installed between the bottom support rod (501) and the top support rod (502).

3. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 2, characterized in that: Multiple sets of parallel first springs (503) are installed between the bottom support rod (501) and the top support rod (502). Multiple sets of parallel baffles (14) are installed on the surfaces of both the bottom support rod (501) and the top support rod (502). The ends of the first springs (503) are installed between two adjacent sets of baffles (14).

4. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 1, characterized in that: A second spring (304) is installed between both ends of the cross sleeve (302) and both ends of the support base (301), and is sleeved on the outer ring of the ring (303).

5. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 4, characterized in that: The V-shaped component (403) includes two sets of support plates (4031) fixedly installed on the rotating ring (402). Hydraulic rods (4032) are also fixedly installed on the inner side of both sets of support plates (4031). The output end side of one set of hydraulic rods (4032) abuts against the outer ring of the cross sleeve (302).

6. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 5, characterized in that: The drive unit (404) includes a rectangular frame (4041) that is slidably installed inside the chassis (10). The top of the rectangular frame (4041) is provided with two sets of parallel racks (4042). The outer ring of the rotating ring (402) is provided with a gear ring (4043) that meshes with the racks (4042). A servo motor (4044) is fixedly installed on the bracket (13). A turntable (4045) is fixedly installed on the output shaft of the servo motor (4044). The bottom of the turntable (4045) is connected to the rectangular frame (4041) through a rocker arm (4046) that is rotatably connected.

7. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 1, characterized in that: The four corners of the top of the chassis (10) are welded with lifting rings (15), and the two sides of the bottom of the chassis (10) are provided with outward-folding mounting plates (16).

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