Direct-acting solid insulation switch

Abstract

A direct-acting type solid insulation switch disclosed by the present invention comprises a mechanism box, one side of the mechanism box is fixedly connected with an A-phase insulation cylinder, a B-phase insulation cylinder and a C-phase insulation cylinder, and the A-phase insulation cylinder, the B-phase insulation cylinder and the C-phase insulation cylinder are internally provided with insulation pull rods and isolation connecting rods. The isolation connecting rod is connected with a spring contact finger through an isolation moving contact, a circuit breaker mechanism is installed in the mechanism box, one side of the mechanism box is fixedly connected with a mechanism box sealing plate, and an isolation grounding mechanism is installed in the mechanism box. According to the invention, through the design of the direct-acting solid insulation structure and the isolation connecting rod, miniaturization and efficient operation of the switch are realized, so that the safety and reliability of equipment are enhanced, and finally, the advantages of reducing space occupation and improving installation flexibility are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of insulating switches, and particularly relates to a direct-acting solid insulating switch. Background Art

[0002] With the progress of technology and the deepening of the concept of environmental protection, the future development of switchgear will pay more attention to miniaturization and environmental performance. The following are several main directions for the future development of switchgear:

[0003] First of all, miniaturization will become an important trend in the design of switchgear. With the continuous innovation of materials science and manufacturing processes, switchgear will develop towards being lighter, thinner, and more compact. Miniaturized switchgear not only saves space and reduces installation costs, but also facilitates installation and use in urban dense areas and confined spaces. In the future, by adopting new insulating materials, optimizing the internal structure layout, and integrated design, the volume and weight of switchgear are expected to be further reduced, improving its applicability in various scenarios.

[0004] Secondly, environmental performance will become the key to the development of switchgear. Switchgear will use more environmentally friendly materials, reduce the use of harmful substances, and reduce the impact on the environment. For example, halogen-free insulating materials, recyclable metal components, etc. are used to achieve the green manufacturing of switchgear. At the same time, the production process of switchgear will pay more attention to energy conservation and emission reduction, and reduce energy consumption and pollutant emissions by optimizing the production process.

[0005] In addition, the combination of intelligence and environmental protection will become a new highlight of switchgear. Switchgear will integrate more intelligent monitoring and control functions, real-time monitor the circuit state, achieve fault warning and automatic protection, thereby reducing energy consumption and improving the operation efficiency of the power system. Through intelligent energy efficiency management, switchgear helps to build a green and low-carbon power system.

[0006] However, there are some problems in the existing technology: most of them adopt the knife-switch type scheme, and there will be a rotation radius during the operation process of the knife switch. Therefore, the longitudinal space will be increased during the design process. Once a certain part fails, another part will also be affected. Therefore, we propose a direct-acting solid insulating switch. Summary of the Invention

[0007] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a direct-acting solid-insulated switch. By adopting the treatment method of spraying zinc on the outer surface, while miniaturizing, the induced charges generated by the internal high-voltage live parts are grounded and eliminated, making it safer to use. Through reasonable design and shielding measures, the insulating cylinder treated by spraying zinc makes the internal electric field more uniform, and the partial discharge index is also more stable. In the traditional design, the isolation chamber and the circuit breaker chamber are usually placed together. Once a fault occurs in a certain part, another part will also be affected. The present invention adopts a separate chamber design, which does not affect each other and the electric field is more uniform. The isolation mechanism and the grounding mechanism are designed as a whole, saving the overall space and component cost of the switch. The main body mechanism of the switch is the isolation grounding operating mechanism and the circuit breaker mechanism, both of which adopt the modular design concept. When integrating the switch, only 8 fixed positions need to be connected, which can greatly improve the production efficiency, reduce the labor cost and production cycle. To improve the environmental adaptability of the switch, the design scheme adopts the mechanism sealing scheme, isolating the inside from the outside, and the protection level can reach IP67.

[0008] The present invention is realized as follows: A direct-acting solid-insulated switch adopts the treatment method of spraying zinc on the outer surface. While miniaturizing, the induced charges generated by the internal high-voltage live parts are grounded and eliminated, making it safer to use. Through reasonable design and shielding measures, the insulating cylinder treated by spraying zinc makes the internal electric field more uniform, and the partial discharge index is also more stable.

[0009] It includes a mechanism box. One side of the mechanism box is fixedly connected with an A-phase insulating cylinder, a B-phase insulating cylinder and a C-phase insulating cylinder. Inside the A-phase insulating cylinder, B-phase insulating cylinder and C-phase insulating cylinder, there are insulating pull rods and isolation connecting rods. The isolation connecting rod is connected with spring fingers through an isolation moving contact. Inside the mechanism box, a circuit breaker mechanism is installed. One side of the mechanism box is fixedly connected with a mechanism box sealing plate, and an isolation grounding mechanism is installed inside the mechanism box; One side of the mechanism box sealing plate is penetrated and connected with a tripping operation shaft, a closing operation shaft, a energy storage indication shaft, an energy storage operation shaft, a closing and tripping indication shaft and a grounding operation shaft. An isolation closing stop is connected to the closing and tripping indication shaft. An isolation interlock cam is fixedly connected to the isolation closing stop. The rear part of the isolation interlock cam is connected with an isolation operation shaft. A stop fixing piece is fixedly connected to the mechanism box sealing plate. An isolation grounding interlock stop is movably connected to the stop fixing piece. A grounding combined interlock cam is fixedly connected to the grounding operation shaft. A first cable compartment interlock and a second cable compartment interlock are connected to the grounding combined interlock cam. One side of the mechanism box is provided with an insulating cylinder sealing strip.

[0010] Optionally, an aviation plug is installed on the top of the mechanism box, and a partition support plate is connected to the lower part of the mechanism box, and a switch support plate is connected to the partition support plate.

[0011] Optionally, a grounding welding block is welded to the lower part of the mechanism box, and the isolation grounding mechanism is connected to the grounding welding block through a grounding flexible connection.

[0012] Optionally, a third interlock spring is provided between the isolation grounding interlock flap and the flap fixing piece, a second interlock spring is connected to the second cable compartment door interlock, and a first interlock spring is connected to the first cable compartment door interlock.

[0013] Optionally, an interlock guide plate is provided at the lower part of the first cable compartment door interlock and the second cable compartment door interlock, and the interlock guide plate is fixedly connected to the partition support plate.

[0014] Optionally, a sealing plate sealing ring is installed on the mechanism box sealing plate, and a first flexible connection is installed on the insulating pull rod.

[0015] Optionally, a mechanism isolation shaft and a mechanism grounding shaft are installed on the isolation grounding mechanism, and a grounding rod and a grounding static contact are connected to one end of the isolation grounding mechanism.

[0016] Optionally, an isolation travel plate and a grounding travel plate are installed inside the isolation grounding mechanism.

[0017] Optionally, a first bushing and a second bushing are provided on each of the A-phase insulating cylinder, the B-phase insulating cylinder, and the C-phase insulating cylinder. An isolation support frame is connected to the isolation connecting rod, and a grounding contact is connected to the isolation support frame. An epoxy resin insulating cylinder is provided inside the A-phase insulating cylinder, the B-phase insulating cylinder, and the C-phase insulating cylinder. A first conductive member and a second shielding net are provided inside the first bushing, and a first shielding net is provided on the left side of the first bushing.

[0018] Optionally, the spring finger is connected to a second conductive member. A vacuum arc extinguishing chamber is provided at the lower part of the insulating pull rod. A third shielding net is provided at the lower part of the vacuum arc extinguishing chamber. A third conductive member is connected to the second bushing. M inserts and M inserts are provided at the lower parts of the A-phase insulating cylinder, the B-phase insulating cylinder, and the C-phase insulating cylinder.

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

[0020] 1. Through the design of a direct-acting solid insulation structure and an isolating connecting rod, the miniaturization and efficient operation of the switch are achieved, thereby enhancing the safety and reliability of the equipment, and finally achieving the beneficial effects of reducing space occupancy and improving installation flexibility. Specifically, the direct-acting solid insulation solution is adopted to replace the traditional knife-switch design, eliminating the space required for rotational movement and significantly reducing the longitudinal dimension. At the same time, the isolating connecting rod is connected to the isolating moving contact through spring fingers, ensuring a stable electrical connection between the high-voltage live parts. This design enables the induced charges generated by the internal high-voltage live parts to be effectively grounded and discharged, improving the safety of use. In addition, due to the reduction of unnecessary mechanical components, the failure rate is reduced, further enhancing the reliability and stability of the system.

[0021] 2. By modularizing the circuit breaker mechanism and the isolating grounding mechanism, a quick and simple assembly process is achieved, thereby simplifying the production and maintenance processes, and finally achieving the beneficial effects of improving production efficiency, reducing manufacturing costs, and shortening the product time-to-market. Both the circuit breaker mechanism and the isolating grounding mechanism adopt modular designs. This not only means that each component can be independently manufactured and tested, but also only requires simple alignment of 8 fixed points during on-site installation to complete the assembly. Such a design greatly reduces the time and complexity of on-site commissioning, and also facilitates subsequent maintenance and replacement work. Modularization also promotes the use of standardized parts, reduces the difficulty of inventory management, and contributes to the economic benefits of mass production. Therefore, this innovation brings obvious benefits to both manufacturers and users.

[0022] 3. By adopting a fully sealed design and selecting high-strength lightweight materials such as SMC for the mechanism box cover plate, effective isolation from the external environment is achieved, thereby protecting the internal components from external factors, and finally achieving the beneficial effects of extending the equipment service life and enhancing environmental adaptability. The overall sealing performance of the switch and its resistance to harsh environmental conditions are emphasized. Measures such as the sealing strip between the mechanism box and the insulating cylinder, and the cover plate sealing ring on the mechanism box cover plate, combined with the application of the full-welding process and SMC materials, ensure complete isolation of the core unit from the outside world, and can maintain good operating conditions even in a humid or dusty environment. With a protection level reaching the IP67 standard, the equipment can work normally under short-term immersion, greatly expanding its application range. This design not only increases the durability of the product, but also ensures the safety and continuity of power transmission, which is particularly important in outdoor or industrial environments.

[0023] Other features and advantages of the present invention will become clear from the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0024] Figure 1It is a schematic cross-sectional view provided by the present invention;

[0025] Figure 2 It is a schematic right view provided by the present invention;

[0026] Figure 3 It is a schematic left view provided by the present invention;

[0027] Figure 4 It is a schematic top view provided by the present invention;

[0028] Figure 5 It is a schematic three-dimensional view provided by the present invention;

[0029] Figure 6 It is a schematic left view of the mechanism box provided by the present invention;

[0030] Figure 7 It is a schematic plan view of the isolation grounding mechanism provided by the present invention;

[0031] Figure 8 It is a schematic three-dimensional view of the isolation grounding mechanism provided by the present invention;

[0032] Figure 9 It is a schematic side view of the isolation grounding mechanism provided by the present invention;

[0033] Figure 10 It is a schematic cross-sectional view of the insulating cylinder provided by the present invention;

[0034] Figure 11 It is a schematic view of the lower part of the machine insulating cylinder provided by the present invention.

[0035] In the figure: 1. A-phase insulating cylinder; 2. B-phase insulating cylinder; 3. C-phase insulating cylinder; 4. Spring finger; 5. Isolating moving contact; 6. Isolating connecting rod; 7. First flexible connection; 8. Insulating pull rod; 9. Insulating cylinder sealing strip; 10. Mechanism box; 11. Aviation plug; 12. Grounding flexible connection; 13. Isolating grounding mechanism; 14. Grounding welding block; 15. Circuit breaker mechanism; 16. Sealing plate sealing ring; 17. Mechanism box sealing plate; 18. Switch support plate; 19. Partition support plate; 20. Grounding rod; 21. Grounding static contact; 22. Tripping operation shaft; 23. Closing operation shaft; 24. Energy storage indicating shaft; 25. Energy storage operation shaft; 26. Tripping and closing indicating shaft; 27. Grounding operation shaft; 28. Isolating grounding interlock tab; 29. Isolating closing tab; 30. Isolating interlock cam; 31. Tab fixing piece; 32. Grounding combined interlock cam; 33. First cable compartment interlock; 34. Second cable compartment interlock; 35. Interlock guide plate; 36. First interlock spring; 37. Second interlock spring; 38. Third interlock spring; 39. Isolating operation shaft; 40. Mechanism isolating shaft; 41. Mechanism grounding shaft; 42. Isolating travel plate; 43. Grounding travel plate; 44. Epoxy resin insulating cylinder; 45. Grounding contact; 46. Isolating support frame; 47. First bushing; 48. Second bushing; 49. Third conductive part; 50. Vacuum interrupter; 51. Third shielding net; 52. Second conductive part; 53. First shielding net; 54. First conductive part; 55. Second shielding net; 56. M8 insert; 57. M10 insert. Specific embodiments

[0036] In order to further understand the content, features and effects of the present invention, the following embodiments are hereby exemplified and described in detail in conjunction with the accompanying drawings as follows.

[0037] As Figures 1 to 11As shown in the figure, an embodiment of the present invention provides a direct-acting solid-insulated switch, which includes a mechanism box 10. One side of the mechanism box 10 is fixedly connected with an A-phase insulating cylinder 1, a B-phase insulating cylinder 2, and a C-phase insulating cylinder 3. Inside the A-phase insulating cylinder 1, the B-phase insulating cylinder 2, and the C-phase insulating cylinder 3, there are insulating pull rods 8 and isolating connecting rods 6. The isolating connecting rod 6 is connected with a spring finger 4 through an isolating moving contact 5. Inside the mechanism box 10, a circuit breaker mechanism 15 is installed. One side of the mechanism box 10 is fixedly connected with a mechanism box sealing plate 17. Inside the mechanism box 10, an isolating grounding mechanism 13 is installed; one side of the mechanism box sealing plate 17 is penetrated and connected with a tripping operation shaft 22, a closing operation shaft 23, a energy storage indicating shaft 24, an energy storage operation shaft 25, a tripping and closing indicating shaft 26, and a grounding operation shaft 27. A isolating closing stop piece 29 is connected to the tripping and closing indicating shaft 26. An isolating interlocking cam 30 is fixedly connected to the isolating closing stop piece 29. The rear part of the isolating interlocking cam 30 is connected with an isolating operation shaft 39. A stop piece fixing piece 31 is fixedly connected to the mechanism box sealing plate 17. An isolating grounding interlocking stop piece 28 is movably connected to the stop piece fixing piece 31. A grounding combined interlocking cam 32 is fixedly connected to the grounding operation shaft 27. A first cable compartment door interlock 33 and a second cable compartment door interlock 34 are connected to the grounding combined interlocking cam 32. One side of the mechanism box 10 is provided with an insulating cylinder sealing strip 9.

[0038] An aviation plug 11 is installed on the top of the mechanism box 10. The lower part of the mechanism box 10 is connected with a partition support plate 19, and the partition support plate 19 is connected with a switch support plate 18.

[0039] A grounding welding block 14 is welded to the lower part of the mechanism box 10. The isolating grounding mechanism 13 is connected to the grounding welding block 14 through a grounding flexible connection 12.

[0040] A third interlocking spring 38 is arranged between the isolating grounding interlocking stop piece 28 and the stop piece fixing piece 31. A second interlocking spring 37 is connected to the second cable compartment door interlock 34. A first interlocking spring 36 is connected to the first cable compartment door interlock 33.

[0041] The lower parts of the first cable compartment door interlock 33 and the second cable compartment door interlock 34 are provided with an interlocking guide plate 35, and the interlocking guide plate 35 is fixedly connected with the partition support plate 19.

[0042] A sealing plate sealing ring 16 is installed on the mechanism box sealing plate 17, and a first flexible connection 7 is installed on the insulating pull rod 8.

[0043] An mechanism isolating shaft 40 and an mechanism grounding shaft 41 are installed on the isolating grounding mechanism 13. One end of the isolating grounding mechanism 13 is connected with a grounding rod 20 and a grounding static contact 21.

[0044] An isolating travel plate 42 and a grounding travel plate 43 are installed inside the isolating grounding mechanism 13.

[0045] The first bushing 47 and the second bushing 48 are provided on each of the phase A insulating cylinder 1, phase B insulating cylinder 2, and phase C insulating cylinder 3. An isolating connecting rod 6 is connected with an isolating support frame 46, and a grounding contact 45 is connected to the isolating support frame 46. An epoxy resin insulating cylinder 44 is provided inside the phase A insulating cylinder 1, phase B insulating cylinder 2, and phase C insulating cylinder 3. A first conductive member 54 and a second shielding net 55 are provided inside the first bushing 47, and a first shielding net 53 is provided on the left side of the first bushing 47.

[0046] The spring finger 4 is connected with a second conductive member 52. A vacuum interrupter 50 is provided at the lower part of the insulating pull rod 8. A third shielding net 51 is provided at the lower part of the vacuum interrupter 50. A third conductive member 49 is connected to the second bushing 48. M10 inserts 57 and M8 inserts 56 are provided at the lower parts of the phase A insulating cylinder 1, phase B insulating cylinder 2, and phase C insulating cylinder 3.

[0047] The working principle is as follows: This switch is a three-position switch, namely the open position, closed position, and grounding position. Based on the rotational movements of the isolating operating shaft 39 and the grounding operating shaft 27, the rotational movements are converted into vertical movements through an internal gear transmission system, thereby controlling the actions of the isolating moving contact 5 and the grounding rod 20.

[0048] The user rotates the isolating operating shaft 39 clockwise through an operating handle (not shown) outside the mechanism box cover 17. The isolating operating shaft 39 drives the isolating interlocking cam 30, and through the isolating travel plate 42, the isolating connecting rod 6 moves downward. The downward movement of the isolating connecting rod 6 causes the isolating moving contact 5 connected thereto to also move downward, finally achieving the closing of the disconnector.

[0049] Next, the user or the automation system operates the circuit breaker mechanism 15, causing the insulating pull rod 8 to act, and then driving the vacuum interrupter 50 to complete closing, making the entire circuit in a conducting state.

[0050] If the switch is to be placed in the grounding position, the user needs to rotate the grounding operating shaft 27 clockwise. The grounding combined interlocking cam 32 on the grounding operating shaft 27 will be activated, and through the grounding travel plate 43, the grounding rod 20 moves downward. After the grounding rod 20 contacts the grounding static contact 21, a safe grounding path is formed to ensure safety during maintenance.

[0051] Both the isolating grounding mechanism 13 and the circuit breaker mechanism 15 adopt a modular design. This design simplifies the assembly process because only the modules need to be aligned with 8 fixed points on the mechanism box 10 for connection. This not only improves production efficiency but also facilitates on-site installation and later maintenance.

[0052] To ensure that the device is not affected by the external environment, the mechanism box 10 adopts a full-welding process, and an insulating cylinder sealing strip 9 is provided between the mechanism box 10 and the A-phase insulating cylinder 1, B-phase insulating cylinder 2, and C-phase insulating cylinder 3 of the insulating cylinder. In addition, a sealing plate sealing ring 16 is provided on the mechanism box sealing plate 17, achieving an IP67 protection level and effectively preventing dust and water from entering.

[0053] To ensure operation safety, a variety of mechanical interlock mechanisms are integrated in the device. For example, the third interlock spring 38 between the isolating grounding interlock flap 28 and the flap fixing piece 31, and the first interlock spring 36 and the second interlock spring 37 on the first cable hatch interlock 33 and the second cable hatch interlock 34. These interlock components ensure that corresponding actions will only occur when the correct operation sequence is executed, avoiding the risk of misoperation.

[0054] The grounding contact 45 is located on the isolating support frame 46, which can provide an additional electrical connection point to ensure the safety of the system.

[0055] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A direct-acting solid insulated switch, comprising a mechanism box (10), characterized in that: One side of the mechanism box (10) is fixedly connected with an A-phase insulation cylinder (1), a B-phase insulation cylinder (2) and a C-phase insulation cylinder (3); the A-phase insulation cylinder (1), the B-phase insulation cylinder (2) and the C-phase insulation cylinder (3) are each provided with an insulation pull rod (8) and an isolation connecting rod (6); the isolation connecting rod (6) is connected with a spring contact finger (4) via an isolation moving contact (5); a circuit breaker mechanism (15) is installed inside the mechanism box (10); one side of the mechanism box (10) is fixedly connected with a mechanism box sealing plate (17); an isolation grounding mechanism (13) is installed inside the mechanism box (10); one side of the mechanism box sealing plate (17) is penetrated and connected with an opening operation shaft (22), a closing operation shaft (23), an energy storage indication shaft (24) and an energy storage operation shaft (25); ), an opening and closing indication shaft (26) and a grounding operation shaft (27), the opening and closing indication shaft (26) is connected to an isolation closing baffle (29), the isolation closing baffle (29) is fixedly connected to an isolation interlocking cam (30), the rear of the isolation interlocking cam (30) is connected to an isolation operation shaft (39), the mechanism box sealing plate (17) is fixedly connected to a baffle fixing plate (31), the baffle fixing plate (31) is movably connected to an isolation grounding interlocking baffle (28), the grounding operation shaft (27) is fixedly connected to a grounding combination interlocking cam (32), the grounding combination interlocking cam (32) is connected to a first cable compartment door interlock (33) and a second cable compartment door interlock (34), and an insulating tube sealing strip (9) is provided on one side of the mechanism box (10).

2. A direct-acting solid insulated switch according to claim 1, characterized in that: An aviation plug (11) is installed on the top of the mechanism box (10), a partition support plate (19) is connected to the bottom of the mechanism box (10), and a switch support plate (18) is connected to the partition support plate (19).

3. A direct-acting solid insulated switch according to claim 1, characterized in that: A grounding welding block (14) is welded to the lower part of the mechanism box (10), and the isolation grounding mechanism (13) is connected to the grounding welding block (14) via a grounding soft connection (12).

4. A direct-acting solid insulated switch according to claim 1, characterized in that: A third interlocking spring (38) is provided between the isolation grounding interlocking baffle (28) and the baffle fixing plate (31), a second interlocking spring (37) is connected to the second cable compartment door interlock (34), and a first interlocking spring (36) is connected to the first cable compartment door interlock (33).

5. A direct-acting solid insulated switch according to claim 1, characterized in that: An interlocking guide plate (35) is provided at the lower part of the first cable compartment door interlock (33) and the second cable compartment door interlock (34), and the interlocking guide plate (35) is fixedly connected to the partition support plate (19).

6. A direct-acting solid insulated switch according to claim 1, characterized in that: A sealing plate sealing ring (16) is installed on the mechanism box sealing plate (17), and a first flexible connection (7) is installed on the insulating pull rod (8).

7. A direct-acting solid insulated switch according to claim 1, characterized in that: A mechanism isolation shaft (40) and a mechanism grounding shaft (41) are installed on the isolation grounding mechanism (13), and one end of the isolation grounding mechanism (13) is connected to a grounding rod (20) and a grounding static contact (21).

8. The direct-acting solid insulated switch according to claim 1, characterized in that: An isolation stroke plate (42) and a grounding stroke plate (43) are installed inside the isolation grounding mechanism (13).

9. A direct-acting solid insulated switch according to claim 1, characterized in that: The A-phase insulating cylinder (1), the B-phase insulating cylinder (2) and the C-phase insulating cylinder (3) are each provided with a first sleeve (47) and a second sleeve (48); the isolating connecting rod (6) is connected to an isolating support frame (46); the isolating support frame (46) is connected to a grounding contact (45); the A-phase insulating cylinder (1), the B-phase insulating cylinder (2) and the C-phase insulating cylinder (3) are each provided with an epoxy resin insulating cylinder (44); the first sleeve (47) is provided with a first conductive member (54) and a second shielding net (55); and the first sleeve (47) is provided with a first shielding net (53) on the left side thereof.

10. A direct-acting solid insulated switch according to claim 9, characterized in that: The spring contact finger (4) is connected to a second conductive member (52), a vacuum arc extinguishing chamber (50) is provided at the bottom of the insulating pull rod (8), a third shielding net (51) is provided at the bottom of the vacuum arc extinguishing chamber (50), a third conductive member (49) is connected to the second sleeve (48), and the lower parts of the A-phase insulating cylinder (1), the B-phase insulating cylinder (2) and the C-phase insulating cylinder (3) are all provided with M10 inserts (57) and M8 inserts (56).

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