An environmentally friendly load switch cabinet parallel breaking device

Abstract

The present invention relates to the technical field of load switch disconnection, and in particular to an environmentally friendly load switch cabinet parallel disconnection device, including a grounding static contact, a lower branch static contact seat, a load switch moving knife switch, a linkage drive structure, a main bus, a branch bus, a miniature vacuum arc extinguisher, a segmented bus, a connecting rod sliding guide block, an opening and closing connecting rod, a sliding guide rail, a sliding guide wheel, a sliding guide shaft, a driving support rod, a reset spring, a shock-absorbing pad, a switching connecting rod fixing part, a knife switch linkage groove, a switching connecting rod, a first guide slide groove, a second guide slide groove, a structural shell, a guide block slide groove, an opening and closing connecting rod roller, and an auxiliary clamping structure. The beneficial effect of the environmentally friendly load switch cabinet parallel disconnection device of the present invention is that by adopting dry air as an insulating medium and parallel disconnection technology, efficient, safe and environmentally friendly disconnection of power equipment is achieved, providing strong technical support for the development of modern power grids.

Description

Technical Field

[0001] The invention relates to the technical field of load switch disconnection, and in particular to an environmentally friendly load switch cabinet parallel disconnection device. Background Art

[0002] With the increasing global environmental awareness, the power equipment industry is actively exploring more environmentally friendly and efficient breaking technologies. In view of the current ring network cabinet, most gas-insulated load switches use SF6 for breaking. SF6 is a greenhouse gas, and the arc decomposition products are toxic and not environmentally friendly. In addition, after breaking the load current, the contacts are eroded by the arc, which will cause electric field distortion and affect the insulation performance of the switch. For this reason, environmentally friendly gas-insulated load switches have appeared in the prior art, but the breaking performance of various environmentally friendly gases is very poor. Most of them use three-position disconnectors in series with vacuum interrupters. The vacuum interrupters are used to break the load current, and the three-position disconnectors are used to form a reliable isolation break. However, the series scheme adds a vacuum interrupter, which is more expensive, and the interlocking operation of each switch is complicated. At the same time, the operating habits are inconsistent with the original SF6 insulated load switch.

[0003] In this context, the present invention proposes an environmentally friendly load switch cabinet parallel disconnecting device, which aims to achieve efficient, safe and environmentally friendly disconnection of power equipment through innovative structural design, and meet the high standards of modern power grids for power equipment. Summary of the invention

[0004] The object of the present invention is to provide an environmentally friendly load switch cabinet parallel disconnecting device to solve the technical problems of the existing load switch cabinet having high cost and complicated interlocking operation of each switch.

[0005] The present invention provides an environmentally friendly load switch cabinet parallel breaking device, comprising a grounding static contact, a lower branch static contact seat, a load switch moving knife switch, a linkage drive structure, a main bus, a branch bus, a miniature vacuum arc extinguisher, and a segmented bus. The grounding static contact is arranged on the opposite side of the lower branch static contact seat, and the grounding static contact is used for grounding when the load switch moving knife switch is closed. The load switch moving knife switch is installed on the lower branch static contact seat, the main bus is arranged above the lower branch static contact seat, the branch bus is arranged on the lower surface of the main bus, the branch bus is connected to the main bus, the miniature vacuum arc extinguisher is installed on the branch bus, the miniature vacuum arc extinguisher is used for extinguishing arcs occurring on high-voltage equipment, a segmented bus is arranged inside the miniature vacuum arc extinguisher, the segmented bus is connected to the branch bus, the linkage drive structure is installed at the front end of the miniature vacuum arc extinguisher, and the linkage drive structure is used for breaking the miniature vacuum arc extinguisher.

[0006] Preferably, the linkage drive structure includes a connecting rod sliding guide block, an opening and closing connecting rod, a sliding guide rail, a sliding guide wheel, a sliding guide shaft, a driving support rod, a knife switch linkage groove, a switching connecting rod, and a structural shell. The opening and closing connecting rod is connected to the front end of the miniature vacuum arc extinguisher, the connecting rod sliding guide block is installed on the opening and closing connecting rod, the connecting rod sliding guide block is fixed on the structural shell, the sliding guide shaft is arranged in the middle of the lower end of the opening and closing connecting rod, the sliding guide wheel is arranged on the sliding guide shaft, the sliding guide wheel is arranged on the sliding guide rail, and the sliding guide rail is installed at the bottom of the front end of the structural shell, the front end of the driving support rod is connected to the sliding guide shaft, the rear end of the driving support rod is connected to the front end of the switching connecting rod, the middle part of the switching connecting rod is fixed to the structural shell through a shaft, a slot is arranged at the upper end of the switching connecting rod, and the knife switch linkage groove is arranged in the middle of the rear end of the switching connecting rod.

[0007] Preferably, a first guide groove is arranged at one end of the knife switch linkage groove, and the first guide groove is used to drive the switching link to rotate when the load switch is cut off. A second guide groove is arranged at the other end of the knife switch linkage groove, and the second guide groove is used to drive the switching link to rotate when the load switch is closed.

[0008] Preferably, a guide block slide groove (23) is provided in the connecting rod sliding guide block (9), an opening and closing connecting rod roller (24) is provided in the middle of the contact position between the opening and closing connecting rod (10) and the connecting rod sliding guide block (9), and an auxiliary locking structure (25) is provided in the guide block slide groove (23), wherein the auxiliary locking structure (25) is provided with a small iron bead with a spring, and the auxiliary locking structure (25) is used to lock the opening and closing connecting rod roller (24) to fix the switching connecting rod so that the micro vacuum arc extinguisher remains in a disconnected state.

[0009] Preferably, a reset spring is arranged on the opening and closing connecting rod, and the reset spring is used to push the opening and closing connecting rod to drive the miniature vacuum arc extinguisher to reset and connect the segmented busbar.

[0010] Preferably, a shock-absorbing pad is provided at the contact point between the structural housing and the switching link, and the shock-absorbing pad is used to reduce the impact force of the switching link on the structural housing when the load switch is switched.

[0011] Preferably, a switching link fixing portion is provided on the shock-absorbing pad, and a buckle is provided on the switching link fixing portion, and the buckle on the switching link fixing portion is used to buckle the slot provided at the upper end of the switching link to fix the switching link so that the miniature vacuum arc extinguisher remains in a disconnected state.

[0012] Preferably, the rear end of the switching link is an arc angle, and the arc angle reduces the sliding resistance of the switching link.

[0013] Preferably, the switching link is in a right-angle shape, the front end of the switching link is a short side, and the rear end of the switching link is a long side.

[0014] Preferably, the driving support rod is a bent rod.

[0015] Through the above scheme, it is known that the present invention is an environmentally friendly load switch cabinet parallel breaking device, which adopts parallel breaking technology to solve the problem of relatively weak insulation performance in dry air medium. The micro vacuum arc extinguisher is specially designed and placed on a bypass circuit parallel to the main circuit of the load switch moving knife, and the bypass circuit is connected to one phase of the electrical equipment. When the equipment is operating normally, that is, the load switch moving knife is closed, the current flows stably through the main circuit, and the micro vacuum arc extinguisher does not participate in the transmission of current.

[0016] However, when the load switch needs to be disconnected, the situation will change. Before the current in the main circuit is completely disconnected, the switching link of the load switch will first ensure that the parallel bypass circuit, that is, the circuit containing the micro vacuum interrupter, is in a closed state. In this way, when the current in the main circuit is cut off, the current originally flowing through the main circuit will be completely transferred to the micro vacuum interrupter.

[0017] As the load switch continues its disconnection action, the switching link will further move to disconnect the connection with the micro vacuum arc extinguisher, thereby completely cutting off the current. This design ensures that at the moment when the load switch cuts off the current, the arc will not be generated inside the load switch because all the current has been carried by the micro vacuum arc extinguisher.

[0018] Since the miniature vacuum arc extinguisher only carries current at the moment when the current is cut off, compared with those vacuum arc extinguishers that are usually used in series with the moving knife of the load switch, the miniature vacuum arc extinguisher under this design has a more streamlined structure and smaller size, thereby achieving higher efficiency and lower cost, achieving a stable and effective breaking effect, and ensuring the stable operation of the power grid.

[0019] Advantages and innovations of the present invention

[0020] 1. Environmental protection: The present invention uses dry air as the insulating medium, avoiding the use of traditional SF6 gas and effectively reducing environmental pollution. At the same time, the use of parallel breaking technology also further improves the performance of the equipment.

[0021] 2. High efficiency: Through the use of parallel breaking technology, the load switch of the present invention can achieve fast and stable breaking in a short time, effectively improving the operation efficiency and reliability of the power grid.

[0022] 3. Safety: The present invention fully considers the requirements of insulation performance and safety performance in structural design. By optimizing the breaking structure and the fracture distance, and using new materials for insulation and support, the present invention has excellent insulation performance and safety performance, and can ensure the safe and stable operation of the power grid.

[0023] 4. Innovation: The invention makes innovative attempts in structural design and insulation material selection, and proposes an environmentally friendly load switch cabinet parallel disconnecting device. This innovation not only helps to promote the development and progress of the power equipment industry, but also provides a useful exploration direction for the design of future power equipment.

[0024] In summary, the environmentally friendly load switch cabinet parallel disconnecting device proposed in the present invention has multiple advantages and innovations such as environmental protection, high efficiency, and safety. By adopting dry air as the insulating medium and parallel disconnecting technology, the present invention realizes efficient, safe, and environmentally friendly disconnection of power equipment, providing strong technical support for the development of modern power grids. At the same time, the innovative design of the present invention also provides a beneficial exploration direction for the development and progress of the future power equipment industry. It is believed that in the future power equipment market, the present invention will occupy an important position and make important contributions to promoting the green development of the power equipment industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of a parallel-type breaking device of an environmentally friendly load switch cabinet of the present invention;

[0027] Figure 2 It is a schematic diagram of the use state of a parallel disconnecting device of an environmentally friendly load switch cabinet of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the first guide chute of a parallel-type breaking device of an environmentally friendly load switch cabinet of the present invention;

[0029] Figure 4 The present invention is a schematic diagram of the internal structure of a connecting rod sliding guide block of a parallel breaking device of an environmentally friendly load switch cabinet.

[0030] Description of reference numerals:

[0031] 1. Grounding static contact, 2. Lower branch static contact seat, 3. Load switch moving knife switch, 4. Linkage drive structure, 5. Main bus, 6. Branch bus, 7. Miniature vacuum arc extinguisher, 8. Segmented bus, 9. Connecting rod sliding guide block, 10. Opening and closing connecting rod, 11. Sliding guide rail, 12. Sliding guide wheel, 13. Sliding guide shaft, 14. Driving support rod, 15. Reset spring, 16. Shock-absorbing pad, 17. Switching connecting rod fixing part, 18. Knife switch linkage groove, 19. Switching connecting rod, 20. First guide slide groove, 21. Second guide slide groove, 22. Structural shell, 23. Guide block slide groove, 24. Opening and closing connecting rod roller, 25. Auxiliary positioning structure. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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.

[0033] Example 1

[0034] See also Figure 1 — Figure 3 The present invention provides an environmentally friendly load switch cabinet parallel breaking device, comprising a grounding static contact 1, a lower branch static contact seat 2, a load switch moving knife 3, a linkage drive structure 4, a main bus 5, a branch bus 6, a miniature vacuum arc extinguisher 7, and a segmented bus 8. The grounding static contact 1 is arranged on the opposite side of the lower branch static contact seat 2. The grounding static contact 1 is used for grounding when closing the load switch moving knife 3. The load switch moving knife 3 is installed on the lower branch static contact seat 2. The main bus 5 is arranged on the lower branch static contact seat 2. Above the lower branch static contact seat 2, the branch bus 6 is arranged on the lower surface of the main bus 5, and the branch bus 6 is connected to the main bus 5. The miniature vacuum arc extinguisher 7 is installed on the branch bus 6. The miniature vacuum arc extinguisher 7 is used to extinguish the arc occurring on the high-voltage equipment. A segmented bus 8 is arranged inside the miniature vacuum arc extinguisher 7, and the segmented bus 8 is connected to the branch bus 6. The linkage drive structure 4 is installed at the front end of the miniature vacuum arc extinguisher 7, and the linkage drive structure 4 is used to disconnect the miniature vacuum arc extinguisher 7.

[0035] The linkage drive structure 4 includes a connecting rod sliding guide block 9, an opening and closing connecting rod 10, a sliding guide rail 11, a sliding guide wheel 12, a sliding guide shaft 13, a driving support rod 14, a knife switch linkage groove 18, a switching connecting rod 19, and a structural shell 22. The opening and closing connecting rod 10 is connected to the front end of the miniature vacuum arc extinguisher 7, the connecting rod sliding guide block 9 is installed on the opening and closing connecting rod 10, the connecting rod sliding guide block 9 is fixed on the structural shell 22, the sliding guide shaft 13 is arranged in the middle of the lower end of the opening and closing connecting rod 10, and the sliding guide wheel 12 is arranged in the middle of the lower end of the opening and closing connecting rod 10. It is arranged on the sliding guide shaft 13, the sliding guide wheel 12 is arranged on the sliding guide rail 11, the sliding guide rail 11 is installed at the bottom of the front end of the structural shell 22, the front end of the driving support rod 14 is connected to the sliding guide shaft 13, the rear end of the driving support rod 14 is connected to the front end of the switching link 19, the middle part of the switching link 19 is fixed to the structural shell 22 through a shaft, the upper end of the switching link 19 is provided with a card slot, and the knife switch linkage groove 18 is arranged in the middle of the rear end of the switching link 19.

[0036] A first guide slot 20 is provided at one end of the knife switch linkage groove 18, and the first guide slot 20 is used to drive the switching link 19 to rotate when the load switch is cut off. A second guide slot 21 is provided at the other end of the knife switch linkage groove 18, and the second guide slot 21 is used to drive the switching link 19 to rotate when the load switch is closed.

[0037] The rear end of the switching link 19 is a circular arc angle, and the circular arc angle reduces the sliding resistance of the switching link 19.

[0038] The switching link 19 is in a right angle shape, the front end of the switching link 19 is a short side, and the rear end of the switching link 19 is a long side.

[0039] The driving support rod 14 is a bent rod.

[0040] In Example 1, an environmentally friendly load switch cabinet parallel breaking device adopts parallel breaking technology to solve the problem of relatively weak insulation performance in dry air medium. The miniature vacuum arc extinguisher 7 is specially designed and placed on a bypass circuit parallel to the main circuit of the load switch moving knife 3, and this bypass circuit is connected to one phase of the electrical equipment. When the equipment is operating normally, that is, the load switch moving knife 3 is closed, the current flows stably through the main bus 5, the branch bus 6, the load switch moving knife 3, and the lower branch static contact seat 2. At this time, the miniature vacuum arc extinguisher 7 does not participate in the transmission of current.

[0041] However, when the load switch movable knife 3 needs to be disconnected, the situation will change. Before the current in the main circuit is completely disconnected, the switching link 19 of the load switch movable knife 3 will first ensure that the parallel bypass circuit, that is, the circuit containing the miniature vacuum interrupter 7, is in a closed state. In this way, when the current in the main circuit is cut off, the current originally flowing through the main circuit will be completely transferred to the miniature vacuum interrupter 7.

[0042] As the load switch moving knife 3 continues its disconnection action, the first guide groove 20 on the knife linkage groove 18 pushes the switching link 19 to move further, pushing the driving support rod 14, and the driving support rod 14 pushes the sliding guide wheel 12 to slide along the sliding guide rail 11, driving the opening and closing link 10 to slide along the link sliding guide block 9, disconnecting the connection of the miniature vacuum arc extinguisher 7, thereby achieving complete current disconnection. The rear end of the switching link 19 is an arc angle, which reduces the sliding resistance of the switching link 19. After the load switch moving knife 3 is pushed, the knife linkage groove 18 will slide out of the switching link 19 and connect to the grounding static contact 1. This design ensures that at the moment when the load switch moving knife 3 cuts off the current, an arc will not be generated inside the load switch moving knife 3, because all the current has been carried by the miniature vacuum arc extinguisher 7.

[0043] When it is necessary to close the load switch moving knife 3, the load switch moving knife 3 is pulled up, and the second guide groove 21 on the knife switch linkage groove 18 pushes the switching link 19 to move further, pushing the driving support rod 14. The driving support rod 14 pushes the sliding guide wheel 12 to slide along the sliding guide rail 11, driving the opening and closing link 10 to advance along the link sliding guide block 9, so that the miniature vacuum arc extinguisher 7 is in a closed state. After the load switch moving knife 3 is pushed, the knife switch linkage groove 18 will slide out from the switching link 19, and then the main bus 5, branch bus 6, load switch moving knife 3, and lower branch static contact seat 2 are connected. This main circuit.

[0044] Example 2

[0045] See also Figure 1 — Figure 3The present invention provides an environmentally friendly load switch cabinet parallel breaking device, comprising a grounding static contact 1, a lower branch static contact seat 2, a load switch moving knife 3, a linkage drive structure 4, a main bus 5, a branch bus 6, a miniature vacuum arc extinguisher 7, and a segmented bus 8. The grounding static contact 1 is arranged on the opposite side of the lower branch static contact seat 2. The grounding static contact 1 is used for grounding when closing the load switch moving knife 3. The load switch moving knife 3 is installed on the lower branch static contact seat 2. The main bus 5 is arranged on the lower branch static contact seat 2. Above the lower branch static contact seat 2, the branch bus 6 is arranged on the lower surface of the main bus 5, and the branch bus 6 is connected to the main bus 5. The miniature vacuum arc extinguisher 7 is installed on the branch bus 6. The miniature vacuum arc extinguisher 7 is used to extinguish the arc occurring on the high-voltage equipment. A segmented bus 8 is arranged inside the miniature vacuum arc extinguisher 7, and the segmented bus 8 is connected to the branch bus 6. The linkage drive structure 4 is installed at the front end of the miniature vacuum arc extinguisher 7, and the linkage drive structure 4 is used to disconnect the miniature vacuum arc extinguisher 7.

[0046] The linkage drive structure 4 includes a connecting rod sliding guide block 9, an opening and closing connecting rod 10, a sliding guide rail 11, a sliding guide wheel 12, a sliding guide shaft 13, a driving support rod 14, a knife switch linkage groove 18, a switching connecting rod 19, and a structural shell 22. The opening and closing connecting rod 10 is connected to the front end of the miniature vacuum arc extinguisher 7, the connecting rod sliding guide block 9 is installed on the opening and closing connecting rod 10, the connecting rod sliding guide block 9 is fixed on the structural shell 22, the sliding guide shaft 13 is arranged in the middle of the lower end of the opening and closing connecting rod 10, and the sliding guide wheel 12 is arranged in the middle of the lower end of the opening and closing connecting rod 10. It is arranged on the sliding guide shaft 13, the sliding guide wheel 12 is arranged on the sliding guide rail 11, the sliding guide rail 11 is installed at the bottom of the front end of the structural shell 22, the front end of the driving support rod 14 is connected to the sliding guide shaft 13, the rear end of the driving support rod 14 is connected to the front end of the switching link 19, the middle part of the switching link 19 is fixed to the structural shell 22 through a shaft, the upper end of the switching link 19 is provided with a card slot, and the knife switch linkage groove 18 is arranged in the middle of the rear end of the switching link 19.

[0047] A first guide slot 20 is provided at one end of the knife switch linkage groove 18, and the first guide slot 20 is used to drive the switching link 19 to rotate when the load switch is cut off. A second guide slot 21 is provided at the other end of the knife switch linkage groove 18, and the second guide slot 21 is used to drive the switching link 19 to rotate when the load switch is closed.

[0048] A reset spring 15 is arranged on the opening and closing connecting rod 10 , and the reset spring 15 is used to push the opening and closing connecting rod 10 to drive the miniature vacuum arc extinguisher 7 to reset and connect the segmented busbar 8 .

[0049] The rear end of the switching link 19 is a circular arc angle, and the circular arc angle reduces the sliding resistance of the switching link 19.

[0050] The switching link 19 is in a right angle shape, the front end of the switching link 19 is a short side, and the rear end of the switching link 19 is a long side.

[0051] The driving support rod 14 is a bent rod.

[0052] The parallel breaking device of an environmentally friendly load switch cabinet of Example 2 adopts the parallel breaking technology to solve the problem of relatively weak insulation performance in dry air medium. The miniature vacuum arc extinguisher 7 is specially designed and placed on a bypass circuit parallel to the main circuit of the load switch moving knife 3, and the bypass circuit is connected to one phase of the electrical equipment. When the equipment is operating normally, that is, the load switch moving knife 3 is closed, the current flows stably through the main circuit of the main bus 5, the branch bus 6, the load switch moving knife 3, and the lower branch static contact seat 2. At this time, the miniature vacuum arc extinguisher 7 does not participate in the transmission of current.

[0053] However, when the load switch movable knife 3 needs to be disconnected, the situation will change. Before the current in the main circuit is completely disconnected, the switching link 19 of the load switch movable knife 3 will first ensure that the parallel bypass circuit, that is, the circuit containing the miniature vacuum interrupter 7, is in a closed state. In this way, when the current in the main circuit is cut off, the current originally flowing through the main circuit will be completely transferred to the miniature vacuum interrupter 7.

[0054] As the load switch moving knife 3 continues its disconnection action, the first guide groove 20 on the knife linkage groove 18 pushes the switching link 19 to move further, pushing the driving support rod 14, and the driving support rod 14 pushes the sliding guide wheel 12 to slide along the sliding guide rail 11, driving the opening and closing link 10 to slide along the link sliding guide block 9, disconnecting the connection of the miniature vacuum arc extinguisher 7, thereby achieving complete current disconnection. The rear end of the switching link 19 is an arc angle, which reduces the sliding resistance of the switching link 19. After the load switch moving knife 3 is pushed, the knife linkage groove 18 will slide out of the switching link 19 and connect to the grounding static contact 1. This design ensures that at the moment when the load switch moving knife 3 cuts off the current, an arc will not be generated inside the load switch moving knife 3, because all the current has been carried by the miniature vacuum arc extinguisher 7.

[0055] When it is necessary to close the load switch moving knife 3, the load switch moving knife 3 is pulled up, and the second guide groove 21 on the knife switch linkage groove 18 pushes the switching link 19 to move further, pushing the driving support rod 14. The driving support rod 14 pushes the sliding guide wheel 12 to slide along the sliding guide rail 11, driving the opening and closing link 10 to advance along the link sliding guide block 9, and the reset spring 15 is used to push the opening and closing link 10 to drive the miniature vacuum arc extinguisher 7 to reset and connect the segmented bus 8, so that the miniature vacuum arc extinguisher 7 is in a closed state. After the load switch moving knife 3 is pushed, the knife switch linkage groove 18 will slide out from the switching link 19, and then the main bus 5, branch bus 6, load switch moving knife 3, and lower branch static contact seat 2 are connected. This main circuit.

[0056] Example 3

[0057] See also Figure 1 — Figure 4 The present invention provides an environmentally friendly load switch cabinet parallel breaking device, comprising a grounding static contact 1, a lower branch static contact seat 2, a load switch moving knife 3, a linkage drive structure 4, a main bus 5, a branch bus 6, a miniature vacuum arc extinguisher 7, and a segmented bus 8. The grounding static contact 1 is arranged on the opposite side of the lower branch static contact seat 2. The grounding static contact 1 is used for grounding when closing the load switch moving knife 3. The load switch moving knife 3 is installed on the lower branch static contact seat 2. The main bus 5 is arranged on the lower branch static contact seat 2. Above the lower branch static contact seat 2, the branch bus 6 is arranged on the lower surface of the main bus 5, and the branch bus 6 is connected to the main bus 5. The miniature vacuum arc extinguisher 7 is installed on the branch bus 6. The miniature vacuum arc extinguisher 7 is used to extinguish the arc occurring on the high-voltage equipment. A segmented bus 8 is arranged inside the miniature vacuum arc extinguisher 7, and the segmented bus 8 is connected to the branch bus 6. The linkage drive structure 4 is installed at the front end of the miniature vacuum arc extinguisher 7, and the linkage drive structure 4 is used to disconnect the miniature vacuum arc extinguisher 7.

[0058] The linkage drive structure 4 includes a connecting rod sliding guide block 9, an opening and closing connecting rod 10, a sliding guide rail 11, a sliding guide wheel 12, a sliding guide shaft 13, a driving support rod 14, a knife switch linkage groove 18, a switching connecting rod 19, and a structural shell 22. The opening and closing connecting rod 10 is connected to the front end of the miniature vacuum arc extinguisher 7, the connecting rod sliding guide block 9 is installed on the opening and closing connecting rod 10, the connecting rod sliding guide block 9 is fixed on the structural shell 22, the sliding guide shaft 13 is arranged in the middle of the lower end of the opening and closing connecting rod 10, and the sliding guide wheel 12 is arranged in the middle of the lower end of the opening and closing connecting rod 10. It is arranged on the sliding guide shaft 13, the sliding guide wheel 12 is arranged on the sliding guide rail 11, the sliding guide rail 11 is installed at the bottom of the front end of the structural shell 22, the front end of the driving support rod 14 is connected to the sliding guide shaft 13, the rear end of the driving support rod 14 is connected to the front end of the switching link 19, the middle part of the switching link 19 is fixed to the structural shell 22 through a shaft, the upper end of the switching link 19 is provided with a card slot, and the knife switch linkage groove 18 is arranged in the middle of the rear end of the switching link 19.

[0059] A first guide slot 20 is provided at one end of the knife switch linkage groove 18, and the first guide slot 20 is used to drive the switching link 19 to rotate when the load switch is cut off. A second guide slot 21 is provided at the other end of the knife switch linkage groove 18, and the second guide slot 21 is used to drive the switching link 19 to rotate when the load switch is closed.

[0060] A guide block slot 23 is provided in the connecting rod sliding guide block 9, an opening and closing connecting rod roller 24 is provided in the middle of the contact position between the opening and closing connecting rod 10 and the connecting rod sliding guide block 9, an auxiliary locking structure 25 is provided in the guide block slot 23, and the auxiliary locking structure 25 is provided with a small iron bead with a spring, and the auxiliary locking structure 25 is used to clamp the opening and closing connecting rod roller 24 to fix the switching connecting rod so that the miniature vacuum arc extinguisher remains in the disconnected state.

[0061] A reset spring 15 is arranged on the opening and closing connecting rod 10 , and the reset spring 15 is used to push the opening and closing connecting rod 10 to drive the miniature vacuum arc extinguisher 7 to reset and connect the segmented busbar 8 .

[0062] A shock absorbing pad 16 is provided at the contact point between the structural housing 22 and the switching link 19 . The shock absorbing pad 16 is used to reduce the impact force of the switching link 19 on the structural housing 22 when the load switch is switched.

[0063] A switching link fixing portion 17 is provided on the shock absorbing pad 16, and a buckle is provided on the switching link fixing portion 17. The buckle on the switching link fixing portion 17 is used to buckle the slot provided on the upper end of the switching link 19 to fix the switching link 19 so that the miniature vacuum arc extinguisher 7 remains in the disconnected state.

[0064] The rear end of the switching link 19 is a circular arc angle, and the circular arc angle reduces the sliding resistance of the switching link 19.

[0065] The switching link 19 is in a right angle shape, the front end of the switching link 19 is a short side, and the rear end of the switching link 19 is a long side.

[0066] The driving support rod 14 is a bent rod.

[0067] In Example 3, an environmentally friendly load switch cabinet parallel breaking device adopts parallel breaking technology to solve the problem of relatively weak insulation performance in dry air medium. The miniature vacuum arc extinguisher 7 is specially designed and placed on a bypass circuit parallel to the main circuit of the load switch moving knife 3, and this bypass circuit is connected to one phase of the electrical equipment. When the equipment is operating normally, that is, the load switch moving knife 3 is closed, the current flows stably through the main bus 5, the branch bus 6, the load switch moving knife 3, and the lower branch static contact seat 2. At this time, the miniature vacuum arc extinguisher 7 does not participate in the transmission of current.

[0068] However, when the load switch movable knife 3 needs to be disconnected, the situation will change. Before the current in the main circuit is completely disconnected, the switching link 19 of the load switch movable knife 3 will first ensure that the parallel bypass circuit, that is, the circuit containing the miniature vacuum interrupter 7, is in a closed state. In this way, when the current in the main circuit is cut off, the current originally flowing through the main circuit will be completely transferred to the miniature vacuum interrupter 7.

[0069] As the load switch moving knife 3 continues its disconnection action, the first guide slot 20 on the knife switch linkage groove 18 pushes the switching link 19 to move further, the shock absorbing pad 16 is used to reduce the impact force of the switching link 19 on the structural housing 22 when switching the load switch, and the buckle on the switching link fixing part 17 buckles the slot set at the upper end of the switching link 19 to fix the switching link 19 so that the micro vacuum arc extinguisher 7 remains in the disconnected state, pushing the driving support rod 14, and the driving support rod 14 pushes the sliding guide wheel 12 to slide along the sliding guide rail 11, driving the opening and closing link 10 to slide out along the link sliding guide block 9, and the opening and closing link roller 24 slides through the guide block slot 23 to disconnect the connection of the micro vacuum arc extinguisher 7, thereby achieving complete current disconnection. After the opening and closing link roller 24 is provided with a small iron ball with a spring through the auxiliary clamping structure 25, it is stuck by the small iron ball, so that the switching link cannot be retracted, and the micro vacuum arc extinguisher remains in the disconnected state.

[0070] The rear end of the switching link 19 is a circular arc angle, which reduces the sliding resistance of the switching link 19. After the load switch moving knife 3 is pushed, the knife linkage groove 18 will slide out of the switching link 19 and connect to the grounding static contact 1. This design ensures that at the moment when the load switch moving knife 3 cuts off the current, an arc will not be generated inside the load switch moving knife 3, because all the current has been carried by the micro vacuum arc extinguisher 7.

[0071] When it is necessary to close the load switch moving knife 3, the load switch moving knife 3 is pulled up, and the second guide groove 21 on the knife switch linkage groove 18 pushes the switching link 19 to move further, pushing the driving support rod 14. The driving support rod 14 pushes the sliding guide wheel 12 to slide along the sliding guide rail 11, driving the opening and closing link 10 to advance along the link sliding guide block 9, and the reset spring 15 is used to push the opening and closing link 10 to drive the miniature vacuum arc extinguisher 7 to reset and connect the segmented bus 8, so that the miniature vacuum arc extinguisher 7 is in a closed state. After the load switch moving knife 3 is pushed, the knife switch linkage groove 18 will slide out from the switching link 19, and then the main bus 5, branch bus 6, load switch moving knife 3, and lower branch static contact seat 2 are connected. This main circuit.

[0072] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmentally friendly load switch cabinet parallel breaking device, characterized in that: The invention comprises a grounding static contact (1), a lower branch static contact seat (2), a load switch moving knife switch (3), a linkage drive structure (4), a main busbar (5), a branch busbar (6), a miniature vacuum arc extinguisher (7), and a segmented busbar (8), wherein the grounding static contact (1) is arranged on the opposite side of the lower branch static contact seat (2), the load switch moving knife switch (3) is installed on the lower branch static contact seat (2), the main busbar (5) is arranged above the lower branch static contact seat (2), the branch busbar (6) is arranged on the lower surface of the main busbar (5), the miniature vacuum arc extinguisher (7) is installed on the branch busbar (6), and a segmented busbar (8) is arranged inside the miniature vacuum arc extinguisher (7). A busbar (8), wherein the segmented busbar (8) is connected to the branch busbar (6), the linkage drive structure (4) is mounted on the front end of the miniature vacuum interrupter (7), the linkage drive structure (4) comprises a connecting rod sliding guide block (9), an opening and closing connecting rod (10), a sliding guide rail (11), a sliding guide wheel (12), a sliding guide rotating shaft (13), a driving support rod (14), a knife switch linkage groove (18), a switching connecting rod (19), and a structural housing (22), the opening and closing connecting rod (10) is connected to the front end of the miniature vacuum interrupter (7), the connecting rod sliding guide block (9) is mounted on the opening and closing connecting rod (10), and the connecting rod sliding guide The block (9) is fixed on the structural housing (22), the sliding guide shaft (13) is arranged in the middle of the lower end of the opening and closing connecting rod (10), the sliding guide wheel (12) is arranged on the sliding guide shaft (13), the sliding guide wheel (12) is arranged on the sliding guide rail (11), the sliding guide rail (11) is installed at the bottom of the front end of the structural housing (22), the front end of the driving support rod (14) is connected to the sliding guide shaft (13), the rear end of the driving support rod (14) is connected to the front end of the switching connecting rod (19), and the middle part of the switching connecting rod (19) is fixed to the structural housing (22) through a shaft. The switching link (19) is provided with a slot at the upper end, the knife switch linkage groove (18) is provided in the middle of the rear end of the switching link (19), a first guide slot (20) is provided at one end of the knife switch linkage groove (18), a second guide slot (21) is provided at the other end of the knife switch linkage groove (18), a guide block slot (23) is provided in the connecting rod sliding guide block (9), an opening and closing connecting rod roller (24) is provided in the middle of the contact position between the opening and closing connecting rod (10) and the connecting rod sliding guide block (9), an auxiliary locking structure (25) is provided in the guide block slot (23), and the auxiliary locking structure (25) is provided with a small iron ball with a spring.

2. The environmentally friendly load switch cabinet parallel breaking device according to claim 1 is characterized in that: A return spring (15) is provided on the opening and closing connecting rod (10).

3. The environmentally friendly load switch cabinet parallel breaking device according to claim 1 is characterized in that: A shock absorbing pad (16) is provided at a contact point between the structural housing (22) and the switching link (19).

4. The environmentally friendly load switch cabinet parallel breaking device according to claim 3 is characterized in that: A switching link fixing portion (17) is provided on the shock absorbing pad (16), and a buckle is provided on the switching link fixing portion (17).

5. The environmentally friendly load switch cabinet parallel breaking device according to claim 2 is characterized in that: The rear end of the switching connecting rod (19) is an arc angle.

6. The parallel disconnecting device of an environmentally friendly load switch cabinet according to claim 2 is characterized in that: The switching link (19) is in a right-angle shape, the front end of the switching link (19) is a short side, and the rear end of the switching link (19) is a long side.

7. The parallel disconnecting device of an environmentally friendly load switch cabinet according to claim 2 is characterized in that: The driving support rod (14) is a bent rod.

Images