Novel electric disconnecting switch

Abstract

The utility model discloses a novel electric disconnecting switch, comprising a pedestal, the top end of the pedestal is fixedly provided with two insulators, the top ends of the two insulators are respectively and fixedly provided with a static contact and two support plates, and a rotating shaft is rotatably connected between the two support plates. According to the utility model, the motor rotates, the motor drives the screw rod to rotate, the supporting column at the top end of the moving frame drives the rack to move, the rack drives the gear to rotate, the gear drives the rotating shaft to rotate, the rotating shaft drives the contact knife to rotate downwards, and the contact knife is contacted with the static contact to realize closing of the isolating switch; the arc extinguishing cover just covers the top end of the static contact, arc extinguishing is carried out on electric arcs generated during contact, a worker does not need to carry out closing, the safety performance and the protection performance of the device are improved, the arc extinguishing cover does not cover the static contact before closing, and heat dissipation of the device is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of disconnecting switches, in particular to a novel electric disconnecting switch. Background Technique

[0002] A disconnecting switch is a key switching device in an electrical system, mainly used for isolating the power supply under no-load conditions, performing switching operations, and connecting and disconnecting small-current circuits. Through its unique mechanical structure design, it ensures the safety of the maintenance and repair work of electrical equipment. Modern disconnecting switches adopt high-quality conductive materials, optimized structural designs, and high-quality insulating materials, improving their reliability, durability, and electrical insulation performance, and are widely used in multiple fields such as power systems, household appliances, and industrial automation.

[0003] In an electrical system, an arc is a discharge phenomenon generated due to the interruption of current, which may cause equipment damage and safety hazards. As a switching device without an arc extinguishing function, special attention needs to be paid to the generation of arcs during the operation of a disconnecting switch. To effectively prevent arcs, a series of safety measures are designed for disconnecting switches, such as optimizing the contact shape and materials, using arc-resistant materials, and improving insulation performance. In special application scenarios, such as high-voltage power systems, the impact of arcs on the surrounding environment and personnel also needs to be considered. Therefore, some advanced disconnecting switch designs adopt fast arc extinguishing technology to ensure the safety of operations.

[0004] Patent document CN219303546U discloses a disconnecting switch, including a mounting plate, a moving contact support, a static contact support, and a moving contact. The moving contact support and the static contact support are mounted on the mounting plate. The moving contact is hinged on the moving contact support. The static contact support is the component that the moving contact contacts when closed. The electrical contact between the moving contact and the static contact support can achieve the opening of the circuit. On the moving contact support, on both sides of the moving contact, there are upward extension plates. The inner sides of the extension plates contact the moving contact and push the moving contact inward. The extension plates are conductive sheets and are electrically connected to the moving contact support. Such a disconnecting switch has the advantage of ensuring good contact between the moving contact and the moving contact support.

[0005] In the prior art of the above patent, the disconnecting switch is a key switching device in the electrical system, and the closing and opening of the circuit are achieved through the movement of the moving contact. However, during the operation of the above device, an arc is easily generated between the moving contact and the static contact, which is caused by the ionization of air due to the change of voltage and current in the circuit. The high temperature and strong light generated by the arc pose potential hazards to the operator and external devices, such as burns, eye injuries, and equipment damage. To reduce these hazards, an arc extinguishing cover can be set at the contact point, but this may also bring challenges such as a decrease in heat dissipation performance and inconvenient operation. Therefore, when designing a disconnecting switch, it is necessary to comprehensively consider arc suppression, heat dissipation performance, and operation convenience to achieve its stable and reliable operation and ensure the safety of personnel and equipment. Summary of the Invention

[0006] The purpose of the present utility model is to provide a new type of electric disconnecting switch to solve the above deficiencies in the prior art.

[0007] To achieve the above purpose, the present utility model adopts the following technical solutions: A new type of electric disconnecting switch includes a base. At the top of the base, two insulators are fixedly installed. At the top of the two insulators, a static contact and two support plates are respectively fixedly installed. A rotating shaft is rotatably connected between the two support plates. A contact blade is fixedly installed on the rotating shaft. Gears are fixedly installed at both ends of the rotating shaft. At the bottom of the base, a moving frame and a moving component for driving the moving frame to move are provided. At the top of one end of the moving frame, two support columns are fixedly installed. A sliding groove is opened at the top of the base. The support columns are slidably connected with the sliding groove. At the top of the two support columns, racks are fixedly installed. The two racks are respectively engaged with the two gears. An arc extinguishing cover is provided at the other end of the moving frame away from the support column.

[0008] As a further description of the above technical solution: The moving component includes two connecting plates. A screw rod is rotatably connected between the two connecting plates. The screw rod is threadedly connected with the side wall of the moving frame. A motor is fixedly installed on the side wall of one of the connecting plates. The output end of the motor is in transmission connection with the screw rod.

[0009] As a further description of the above technical solution: The arc extinguishing cover is detachably arranged at the top of the moving frame.

[0010] As a further description of the above technical solution: Threaded holes are opened on the side walls of the arc extinguishing cover and the side wall of the moving frame. Bolts are threadedly installed on the threaded holes. The arc extinguishing cover is fixedly installed at the top of the moving frame through the bolts.

[0011] As a further description of the above technical solution: A plurality of heat dissipation grooves are opened at the top of the base.

[0012] The present utility model provides a new type of electric disconnecting switch. It has the following beneficial effects: When the disconnecting switch needs to be used in the present utility model, the motor rotates, the motor drives the screw rod to rotate, the support columns at the top of the moving frame drive the rack to move, the rack drives the gear to rotate, the gear drives the rotating shaft to rotate, and the rotating shaft drives the contact blade to rotate downward. The contact blade contacts the static contact to realize the closing of the disconnecting switch. Before the contact blade touches the static contact, the arc extinguishing cover just covers the top of the static contact to extinguish the arc generated during the contact. There is no need for staff to close the switch, which increases the safety performance and protection performance of the device. And the arc extinguishing cover does not cover the static contact before closing, which does not affect the heat dissipation of the device.

[0013] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory, and are not intended to limit the present disclosure.

[0014] This application document provides an overview of various implementations or examples of the technologies described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a novel electric disconnecting switch proposed by the present utility model;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure from another perspective of the present utility model;

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the present utility model after closing the contact blade;

[0018] Figure 4 It is a schematic diagram of the three-dimensional exploded structure of the arc extinguishing cover, moving frame and support column of the present utility model;

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the base, contact blade and static contact of the present utility model.

[0020] LEGEND DESCRIPTION:

[0021] 1. Base; 2. Insulator; 3. Static contact; 4. Support plate; 5. Rotating shaft; 6. Gear; 7. Connecting plate; 8. Motor; 9. Screw; 10. Moving frame; 11. Arc extinguishing cover; 12. Bolt; 13. Threaded hole; 14. Support column; 15. Rack; 16. Chute; 17. Heat dissipation groove; 18. Contact blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] Refer to Figures 1-5, a new type of electric disconnecting switch, comprising a base 1. At the top of the base 1, two insulators 2 are fixedly installed. At the top of the two insulators 2, a static contact 3 and two support plates 4 are respectively fixedly installed. A rotating shaft 5 is rotatably connected between the two support plates 4. A contact blade 18 is fixedly installed on the rotating shaft 5. At both ends of the rotating shaft 5, gears 6 are fixedly installed. At the bottom of the base 1, a moving frame 10 and a moving component for driving the moving frame 10 to move are provided. At the top of one end of the moving frame 10, two support columns 14 are fixedly installed. A chute 16 is opened at the top of the base 1. The support columns 14 are slidably connected to the chute 16. At the top of the two support columns 14, racks 15 are fixedly installed. The two racks 15 are respectively engaged with the two gears 6. At the other end of the moving frame 10 away from the support columns 14, an arc extinguishing cover 11 is provided; when the disconnecting switch needs to be used, the motor 8 rotates, the motor 8 drives the screw rod 9 to rotate, the support columns 14 at the top of the moving frame 10 drive the rack 15 to move, the rack 15 drives the gear 6 to rotate, the gear 6 drives the rotating shaft 5 to rotate, the rotating shaft 5 drives the contact blade 18 to rotate downward, and the contact blade 18 contacts the static contact 3 to realize the closing of the disconnecting switch. Before the contact blade 18 touches the static contact 3, the arc extinguishing cover 11 just covers the top of the static contact 3 to extinguish the arc generated during contact, eliminating the need for staff to close the switch, increasing the safety performance and protection performance of the device, and the arc extinguishing cover 11 is not covered on the static contact 3 before closing, which does not affect the heat dissipation of the device.

[0024] As a preferred technical solution of this embodiment, the moving component includes two connecting plates 7. A screw rod 9 is rotatably connected between the two connecting plates 7. The screw rod 9 is threadedly connected to the side wall of the moving frame 10. On the side wall of one of the connecting plates 7, a motor 8 is fixedly installed. The output end of the motor 8 is drivingly connected to the screw rod 9; by rotating the motor 8, the screw rod 9 is driven to rotate. Under the limiting action of the moving frame 10 and the chute 16, the moving frame 10 can drive the rack 15 and the arc extinguishing cover 11 to move.

[0025] As a preferred technical solution of this embodiment, the arc extinguishing cover 11 is detachably arranged at the top of the moving frame 10; the arc extinguishing cover 11 needs to be replaced regularly to ensure its normal use.

[0026] As a preferred technical solution of this embodiment, threaded holes 13 are opened on the side walls of both the arc extinguishing cover 11 and the moving frame 10. Bolts 12 are threadedly installed on the threaded holes 13. The arc extinguishing cover 11 is fixedly installed at the top of the moving frame 10 through the bolts 12; the arc extinguishing cover 11 can be disassembled through the bolts 12, which is convenient for replacement.

[0027] As a preferred technical solution of this embodiment, a plurality of heat dissipation grooves 17 are provided at the top of the base 1; when the disconnector is working, heat will be generated, and the device can be dissipated through the heat dissipation grooves 17.

[0028] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A novel electric isolating switch, comprising a base (1), wherein two insulators (2) are fixedly mounted on the top of the base (1), wherein the tops of the two insulators (2) are respectively fixedly mounted with a stationary contact (3) and two support plates (4), a rotating shaft (5) is rotatably connected between the two support plates (4), and a contact blade (18) is fixedly mounted on the rotating shaft (5), characterized in that: Gears (6) are fixedly mounted on both ends of the rotating shaft (5); a moving frame (10) and a moving assembly for driving the moving frame (10) to move are arranged at the bottom end of the base (1); two supporting columns (14) are fixedly mounted on the top end of one end of the moving frame (10); a slide groove (16) is provided at the top end of the base (1); the supporting columns (14) are slidably connected to the slide groove (16); racks (15) are fixedly mounted on the top ends of the two supporting columns (14); the two racks (15) are respectively meshed with the two gears (6); an arc extinguishing cover (11) is arranged on the other end of the moving frame (10) away from the supporting columns (14).

2. A new type of electric isolating switch according to claim 1, characterized in that: The moving assembly comprises two connecting plates (7), a screw rod (9) being rotatably connected between the two connecting plates (7), the screw rod (9) being threadedly connected to the side wall of the moving frame (10), a motor (8) being fixedly mounted on the side wall of one of the connecting plates (7), and an output end of the motor (8) being drivingly connected to the screw rod (9).

3. A new type of electric isolating switch according to claim 1, characterized in that: The arc extinguishing cover (11) is detachably arranged on the top end of the movable frame (10).

4. A novel electric isolating switch according to claim 1, characterized in that: The side walls of the arc extinguishing hood (11) and the side walls of the movable frame (10) are both provided with threaded holes (13), bolts (12) are threadedly mounted on the threaded holes (13), and the arc extinguishing hood (11) is fixedly mounted on the top of the movable frame (10) by means of the bolts (12).

5. A novel electric isolating switch according to claim 1, characterized in that: A plurality of heat dissipation grooves (17) are provided at the top of the base (1).

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