A combined circuit breaker for photovoltaic power generation

Abstract

This invention relates to the field of photovoltaic circuit breaker technology. The invention discloses a combined circuit breaker for photovoltaic power generation, comprising a body, an arc-extinguishing mechanism at the top of the body, and rotating arms rotatably arranged around the interior of the body. A first ratchet ring is fixedly connected to the upper surface of the connection between the rotating arms and the body. A spline shaft is located at the axis of the first ratchet ring, and the bottom of the spline shaft passes through the rotating arms and is fixedly connected to the body. A second ratchet ring is slidably arranged on the spline shaft, engaging with the first ratchet ring. Four second ratchet rings are correspondingly arranged, and lifting arms are connected to two adjacent second ratchet rings. Before the body is hoisted, the four rotating arms are extended outwards, extending beyond one end of the body. After the rope end is installed on the lifting ring, the rope is combed into the slot, and the rope is supported and tightened, resulting in a larger hoisting angle and improved hoisting stability.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic circuit breaker technology, specifically a combined circuit breaker for photovoltaic power generation. Background Technology

[0002] Photovoltaic circuit breakers are overcurrent protection and disconnecting switches specifically designed for photovoltaic power generation systems. They are primarily used for overload and short-circuit protection on both the DC and AC sides, as well as electrical isolation during maintenance. Due to the characteristics of photovoltaic systems, such as no zero-crossing point on DC, bidirectional current, and high voltage, they differ greatly from ordinary circuit breakers. Chinese patent CN215770984U discloses a combined vacuum circuit breaker. By placing the lifting ring inside the storage cavity, it provides a certain degree of protection, preventing direct contact with the outside. When in use, pulling the lifting ring causes it to slide along the guide rod via a connecting block, moving the lifting ring out of the storage cavity. This facilitates connection with the hoisting components on the outer wall. When hoisting is not required, the lifting ring is stored inside the storage cavity, leading to better application prospects. For circuit breakers, when using a hoisting structure to lift the device body, the lifting rings can only be fixed to the circuit breaker for hoisting. In the existing technology, due to the limitations of the device body structure itself, it is impossible to ensure the stability control of the circuit breaker hoisting. This can easily lead to situations such as device body tilting and rope displacement during hoisting, which is not conducive to protecting the structural stability of the device body. To address this, we propose a combined circuit breaker for photovoltaic power generation. Summary of the Invention

[0003] The purpose of this invention is to provide a combined circuit breaker for photovoltaic power generation to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: It includes a body, an arc-extinguishing mechanism is provided at the top of the body, a rotating arm is rotatably arranged around the inside of the body, a first ratchet ring is fixedly connected to the upper surface of the connection between the rotating arm and the body, a spline shaft is provided at the axis of the first ratchet ring, the bottom of the spline shaft passes through the rotating arm and is fixedly connected to the body, and a second ratchet ring is slidably arranged on the spline shaft; The second ratchet ring is movably engaged with the first ratchet ring. Four second ratchet rings are provided. Lifting arms are connected to two adjacent second ratchet rings respectively. The top of the second ratchet ring is rotatably sleeved with the lifting arm. The lifting arm is slidably connected to the device body. Trigger shafts are symmetrically installed at both ends of the lifting arm; A toothed ring is fixedly connected to the outer surface of the connection between the rotating arm and the body. A push rod is provided between two closely spaced rotating arms. A top head is fixedly connected to the end of the push rod. The upper surface of the top head abuts against the middle of the lifting arm.

[0004] Preferably, a first elastic element is movably sleeved on the push rod, with both ends of the first elastic element abutting against the push rod and the device body respectively. A rotating element abuts against the end of the push rod away from the top head, and the rotating element is rotatably connected to the device body. The side surface of the rotating element is convex curved.

[0005] Preferably, a pulley assembly is connected to the top of the rotating component, and a servo motor is connected to the end of the pulley assembly away from the rotating component.

[0006] Preferably, a double-headed electric cylinder is fixedly connected to the body above the rotating component. The output shafts at both ends of the double-headed electric cylinder are fixedly connected to racks. The racks are slidably connected to the body and mesh with a gear ring.

[0007] Preferably, the rotating arm has a through opening at the connection point with the body, and a through hole is formed in the middle of the rotating arm, with the interior of the through hole communicating with the end of the trigger shaft.

[0008] Preferably, a lifting ring is provided at the lower oblique position of the through hole near the outer wall of the vessel body, and the lifting ring is fixedly connected to the vessel body.

[0009] Preferably, a connecting member is provided through the interior of the through hole, the bottom of the connecting member is slidably connected to the rotating arm, and a second elastic member is movably sleeved in the middle of the connecting member, the top and bottom of the second elastic member abutting against the connecting member and the rotating arm respectively.

[0010] Preferably, the top of the lifting ring is provided with a vertical shaft that is slidably connected to the body, the bottom of the vertical shaft is fixedly connected with a roller, the surface of the roller abuts against a slider, the slider is slidably connected to the body, and the surface of the slider is inclined.

[0011] Preferably, the slider has a slot inside.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, by setting up rotating arms, four rotating arms are extended outward before the hoisting of the object begins. The rotating arms extend beyond one end of the object. After the rope end is installed on the lifting ring, the rope is combed into the slot, the rope is supported and tightened, so that the hoisting angle formed by the rope is larger and the hoisting stability is improved. In this invention, by using a slider and a locking mechanism, after the rope is stretched and tightened, the slider locks the connection between the rope end and the lifting ring, limiting the rope end and preventing it from shifting during hoisting. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the device body of the present invention; Figure 3 This is a schematic diagram of the unfolded internal structure of the device body of the present invention; Figure 4 This is a schematic diagram of the slider and bayonet structure of the present invention; Figure 5 This is a schematic diagram of the connecting component and the vertical shaft of the present invention.

[0014] In the diagram: 1. Body; 2. Arc extinguishing mechanism; 3. Rotary arm; 4. First ratchet ring; 5. Splined shaft; 6. Second ratchet ring; 7. Lifting arm; 8. Trigger shaft; 9. Gear ring; 10. Push rod; 11. Top head; 12. First elastic element; 13. Rotating element; 14. Pulley assembly; 15. Servo motor; 16. Double-headed electric cylinder; 17. Rack; 18. Through port; 19. Through hole; 20. Lifting ring; 21. Connecting part; 22. Second elastic element; 23. Vertical shaft; 24. Abutment roller; 25. Slider; 26. Bayonet. Detailed Implementation

[0015] 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.

[0016] Please see Figures 1 to 5 The present invention provides a technical solution: a combined circuit breaker for photovoltaic power generation includes a body 1, the top of which is bolted with an arc extinguishing mechanism 2, which is used to extinguish any possible electric arcs during the operation and hoisting of the circuit breaker to ensure equipment safety. Four rotating arms 3 are correspondingly arranged around the inside of the body 1. One end of the rotating arm 3 is rotatably connected to the body 1 through a rotating shaft, and can extend outward around the connection point to the body 1 to serve as a force support structure for hoisting operations. A first ratchet ring 4 is welded and fixed to the upper surface of the connection between the rotating arm 3 and the body 1. A spline shaft 5 is provided through the axis of the first ratchet ring 4. A second ratchet ring 6 is slidably sleeved on the spline shaft 5. The second ratchet ring 6 is adapted to the first ratchet ring 4 and can slide up and down along the spline shaft 5 to achieve engagement and disengagement with the first ratchet ring 4. Four second ratchet rings 6 are provided, corresponding one to one of the four rotating arms 3. Lifting arms 7 are respectively sleeved on two second ratchet rings 6 that are close to each other. The top of the second ratchet ring 6 is rotatably sleeved with the lifting arm 7. The two ends of the lifting arm 7 are slidably connected to the sliding groove opened in the inner wall of the body 1 and can slide up and down along the sliding groove. Trigger shafts 8 are symmetrically welded to the two ends of the lifting arm 7. A toothed ring 9 is welded and fixed to the outer surface of the connection between the rotating arm 3 and the body 1. The toothed ring 9 is coaxially arranged with the rotating arm 3. A push rod 10 is arranged between two rotating arms 3 that are close to each other. A top head 11 is welded to the end of the push rod 10. The top head 11 is a wedge structure that is adapted to the middle of the lifting arm 7. The upper surface of the top head 11 abuts against the middle of the lifting arm 7. A first elastic element 12 is movably sleeved on the push rod 10. In this embodiment, the first elastic element 12 is a compression spring. The two ends of the first elastic element 12 abut against the limiting ring on the push rod 10 and the inner wall of the body 1, respectively. A rotating element 13 abuts against the end of the push rod 10 away from the top head 11. The rotating element 13 is rotatably connected to the body 1 through a rotating shaft. The side surface of the rotating element 13 is convex curved, which facilitates pushing the push rod 10 to slide when rotating. The top of the rotating component 13 is connected to a pulley assembly 14 via a coupling. The pulley assembly 14 consists of a driving pulley, a driven pulley, and a belt. The driving pulley is connected to the output shaft of the servo motor 15, and the driven pulley is connected to the rotating shaft of the rotating component 13. A double-headed electric cylinder 16 is installed above the rotating component 13. The double-headed electric cylinder 16 is bolted to the inner wall of the device body 1. The output shafts at both ends of the double-headed electric cylinder 16 are bolted to a rack 17. The rack 17 is slidably connected to the groove on the inner wall of the device body 1. The rack 17 meshes with the toothed ring 9 to drive the rotating arm 3 to rotate and unfold. A through-hole 18 is provided through the connection point of the rotating arm 3 away from the body 1, for passing through the hoisting rope and spreading the rope outward. A through hole 19 is provided through the middle of the rotating arm 3. The interior of the through hole 19 is connected to the end of the trigger shaft 8, so that the trigger shaft 8 can pass through and trigger the subsequent components. A lifting ring 20 is welded to the lower part of the through hole 19 near the outer wall of the body 1. A connecting piece 21 is provided through the interior of the through hole 19. Its bottom is slidably connected to the guide groove opened in the rotating arm 3. A second elastic element 22 is movably sleeved in the middle of the connecting piece 21. In this embodiment, the second elastic element 22 is a compression spring. The top and bottom of the second elastic element 22 abut against the limiting platform on the connecting piece 21 and the upper surface of the rotating arm 3, respectively. The top of the lifting ring 20 is provided with a vertical shaft 23, which is slidably connected to the groove on the inner wall of the body 1. The bottom of the vertical shaft 23 is rotatably connected to the abutment roller 24 through a rotating shaft. The surface of the abutment roller 24 abuts against the slider 25, which is slidably connected to the groove on the inner wall of the body 1. The surface of the slider 25 is inclined and adapted to the abutment roller 24. The slider 25 has a locking slot 26 inside, which is an arc-shaped groove used to lock the connection between the rope end and the lifting ring 20, thereby limiting and fixing the rope end.

[0017] The method of use and advantages of this invention: The working process of this combined circuit breaker for photovoltaic power generation is as follows: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown: S1: Before hoisting the circuit breaker body 1, the swivel arm 3 needs to be extended outward around the body 1. First, start the servo motor 15. The servo motor 15 drives the swivel part 13 to rotate through the pulley group 14. The side surface of the swivel part 13 is a convex curved surface. When it rotates, it will push the push rod 10 to slide along the body 1. The first elastic element 12 on the push rod 10 is compressed. The top 11 at the end of the push rod 10 abuts against the middle of the lifting arm 7, pushing the lifting arm 7 to move upward. Then, the engagement with the first ratchet ring 4 is broken through the second ratchet ring 6. S2: Start the double-headed electric cylinder 16. The output shafts at both ends of the double-headed electric cylinder 16 extend synchronously, driving the rack 17 fixedly connected to it to slide along the body 1. The sliding of the rack 17 will drive the gear ring 9 to rotate, thereby driving the rotating arm 3 fixedly connected to the gear ring 9 to rotate around its connection with the body 1, so that the four rotating arms 3 open. S3: When the slewing arm 3 is extended to the preset angle, the double-headed electric cylinder 16 is turned off, the rack 17 stops sliding, the gear ring 9 and the slewing arm 3 are fixed in the extended position, and the extension operation of the slewing arm 3 is completed. At this time, the slewing arm 3 is in a state of extending outwards in all directions, providing support for the rope connection. After the slewing arm 3 is extended to the position, take the hoisting rope and connect the lower end of the rope to the hoisting rings 20 around the body 1 respectively. S4: Pass the upper end of the rope through the opening 18 in the middle of the swivel arm 3. At this time, the opening 18 plays a guiding and spreading role, spreading the rope to the outside of the swivel arm 3, keeping the rope away from the main body of the device 1, avoiding friction and collision between the rope and the surface parts of the device 1 during the hoisting process, and protecting the internal structure of the circuit breaker and the rope itself. S5: After the rope connection is completed, the servo motor 15 is started to return to its original position, triggering the second ratchet ring 6 to move downward and engage with the first ratchet ring 4, limiting the rotation arm 3. During the process, the trigger shaft 8 moves downward, and its end moves downward through the through hole 19, pressing the connecting piece 21 downward. The bottom vertical shaft 23 and the abutment roller 24 push the slider 25 to move laterally. The slider 25 locks the connection between the rope end and the lifting ring 20 through the bayonet 26, limiting it and preventing sliding displacement during the hoisting process, which would cause the body 1 to tilt.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined circuit breaker for photovoltaic power generation, characterized by, The device includes a body (1), an arc-extinguishing mechanism (2) is provided on the top of the body (1), a rotating arm (3) is rotatably provided around the inside of the body (1), a first ratchet ring (4) is fixedly connected to the upper surface of the connection between the rotating arm (3) and the body (1), a spline shaft (5) is provided at the axis of the first ratchet ring (4), the bottom of the spline shaft (5) passes through the rotating arm (3) and is fixedly connected to the body (1), and a second ratchet ring (6) is slidably provided on the spline shaft (5). The second ratchet ring (6) is movably engaged with the first ratchet ring (4). There are four second ratchet rings (6) respectively. Lifting arms (7) are connected to two adjacent second ratchet rings (6). The top of the second ratchet ring (6) is rotatably sleeved with the lifting arm (7). The lifting arm (7) is slidably connected to the body (1). The lifting arm (7) is symmetrically equipped with trigger shafts (8) at both ends; A toothed ring (9) is fixedly connected to the outer surface of the connection between the rotating arm (3) and the body (1). A push rod (10) is provided between the two rotating arms (3) that are close to each other. A top head (11) is fixedly connected to the end of the push rod (10). The upper surface of the top head (11) abuts against the middle of the lifting arm (7).

2. The combined circuit breaker for photovoltaic power generation according to claim 1, characterized in that: The push rod (10) is movably fitted with a first elastic element (12), the two ends of the first elastic element (12) abut against the push rod (10) and the body (1) respectively, and the end of the push rod (10) away from the top (11) abuts against a rotating element (13), the rotating element (13) is rotatably connected to the body (1), and the side surface of the rotating element (13) is set in a convex curved shape.

3. The combined circuit breaker for photovoltaic power generation according to claim 2, characterized in that: The top of the rotating component (13) is connected to a pulley assembly (14), and a servo motor (15) is connected to the end of the pulley assembly (14) away from the rotating component (13).

4. A combined circuit breaker for photovoltaic power generation according to claim 3, characterized in that: A double-headed electric cylinder (16) is fixedly connected to the body (1) above the rotating part (13). The output shafts at both ends of the double-headed electric cylinder (16) are fixedly connected to racks (17). The racks (17) are slidably connected to the body (1) and mesh with the toothed ring (9).

5. The combined circuit breaker for photovoltaic power generation according to claim 1, characterized in that: The rotating arm (3) has a through opening (18) at the connection point with the body (1), and a through hole (19) is provided in the middle of the rotating arm (3). The interior of the through hole (19) is connected to the end of the trigger shaft (8).

6. The combined circuit breaker for photovoltaic power generation according to claim 5, characterized in that: A lifting ring (20) is provided at the lower part of the through hole (19) near the outer wall of the vessel body (1), and the lifting ring (20) is fixedly connected to the vessel body (1).

7. The combined circuit breaker for photovoltaic power generation according to claim 6, characterized in that: A connecting member (21) is provided through the inside of the through hole (19). The bottom of the connecting member (21) is slidably connected to the rotating arm (3). A second elastic member (22) is movably sleeved in the middle of the connecting member (21). The top and bottom of the second elastic member (22) abut against the connecting member (21) and the rotating arm (3) respectively.

8. The combined circuit breaker for photovoltaic power generation according to claim 6, characterized in that: The top of the lifting ring (20) is provided with a vertical shaft (23) that is slidably connected to the body (1). The bottom of the vertical shaft (23) is fixedly connected with a roller (24). The surface of the roller (24) abuts against a slider (25). The slider (25) is slidably connected to the body (1). The surface of the slider (25) is inclined.

9. The combined circuit breaker for photovoltaic power generation according to claim 8, characterized in that: The slider (25) has a slot (26) inside.

Images