Arc rotating and extinguishing load switch

Abstract

The utility model belongs to switchgear technical field, especially related to a spin arc arc extinguishing load switch. Including switch frame, static contact seat, moving contact, static contact and arc extinguishing device, static contact seat sets up on the upper portion of switch frame, static contact and arc extinguishing device all set up on static contact seat, be provided with arc contact on arc extinguishing device, moving contact has a plurality of, a plurality of moving contact integrated, a plurality of moving contact rotatable setting on switch frame, moving contact with arc contact opposite setting. Due to integrated setting of a plurality of moving contact, make a plurality of moving contact can synchronous adjustment corner, make it with arc contact adjustment to the best distance angle, reach the best arc extinguishing effect, simple structure, high practicality.

Description

Technical Field

[0001] This utility model belongs to the field of switchgear technology, and specifically relates to a rotary arc extinguishing load switch. Background Technology

[0002] A typical application of gas-insulated load switches is the medium-voltage sulfur hexafluoride (SF6) gas-insulated load switchgear. Utilizing the excellent insulation and arc-extinguishing capabilities of SF6 gas, it fulfills the functions of closing short-circuit currents and breaking load currents. It features simple structure, small size, low cost, high safety, and maintenance-free operation, and has been widely adopted. Gas-insulated load switches employ various arc-extinguishing methods, typically including metal deionization grid type, rotary arc type, and compressed gas type.

[0003] Currently, rotary arc-extinguishing switches on the market mainly consist of a switch frame, stationary contact base, moving contact, stationary contact, and arc-extinguishing device. In multi-phase structures, i.e., multiple arc-extinguishing devices, the moving contact cannot be adjusted synchronously, which affects the overall arc-extinguishing effect and urgently needs to be improved. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the aforementioned problems in the prior art, this utility model provides a synchronously adjustable rotary arc extinguishing load switch.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solution adopted by this utility model includes: a rotary arc extinguishing load switch, comprising a switch frame, a stationary contact base, a moving contact, a stationary contact, and an arc extinguishing device. The stationary contact base is disposed on the upper part of the switch frame, and the stationary contact and the arc extinguishing device are both disposed on the stationary contact base. An arc-inducing contact is disposed on the arc extinguishing device. There are multiple moving contacts, which are integrally formed and rotatably disposed on the switch frame. The moving contacts are disposed opposite to the arc-inducing contacts.

[0008] Furthermore, it also includes a movable support, a contact support, and multiple swing arms. The multiple moving contacts are disposed on the movable support. Support holes matching the two ends of the movable support are opened on both sides of the switch frame. The movable support is hinged to the switch frame through the support holes. The contact support is fixed to the lower part of the switch frame. The movable support is located above the contact support. The lower end of the swing arm is hinged to the contact support, and the upper end of the swing arm is hinged to the movable support. The multiple moving contacts can be rotated and adjusted synchronously.

[0009] Furthermore, it also includes a grounding stationary contact, which is connected to the switch frame.

[0010] Furthermore, it also includes a protective cover, which is hinged to the switch frame on both sides.

[0011] (III) Beneficial Effects

[0012] The beneficial effects of this utility model are: because multiple moving contacts are integrally formed, the rotation angle of multiple moving contacts can be adjusted synchronously, so that they are adjusted to the optimal distance and angle with the arc-initiating contact, thereby achieving the best arc-extinguishing effect. The structure is simple and highly practical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the rotary arc extinguishing load switch of this utility model;

[0014] Figure 2 This is a schematic diagram of a part of the rotary arc extinguishing load switch of this utility model;

[0015] Figure 3 This is a schematic diagram of the protective cover of the rotary arc extinguishing load switch of this utility model;

[0016] Figure 4 This is a schematic diagram of the stationary contact of the rotary arc extinguishing load switch of this utility model.

[0017] [Explanation of Labels in the Attached Image]

[0018] 1. Moving contact; 2. Arc extinguishing device; 3. Arc ignition contact; 4. Stationary contact; 5. Swing arm; 6. Grounding stationary contact; 7. Stationary contact base; 8. Protective cover; 9. Support hole; 10. Switch frame; 11. Contact support. Detailed Implementation

[0019] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Please refer to Figure 1 , 2 3, 4, A rotary arc-extinguishing load switch includes a switch frame 10, a stationary contact base 7, a moving contact 1, a stationary contact 4, and an arc-extinguishing device 2. The stationary contact base 7 is disposed on the upper part of the switch frame 10. The stationary contact 4 and the arc-extinguishing device 2 are both disposed on the stationary contact base 7. An arc-initiating contact 3 is disposed on the arc-extinguishing device 2. There are multiple moving contacts 1, which are integrally formed and rotatably disposed on the switch frame 10. The moving contacts 1 and the arc-initiating contacts 3 are disposed opposite to each other. The opposite arrangement of the moving contacts 1 and the arc-initiating contacts 3 is conducive to arc initiation. The moving contacts 1 and the arc-initiating contacts 3 should be as close as possible, preferably with a distance of no more than 4 mm, to facilitate arc initiation.

[0021] The beneficial effects of this utility model are as follows: Since multiple moving contacts 1 are integrally formed, the multiple moving contacts 1 can be adjusted synchronously to adjust their rotation angles to achieve the best distance and angle with the arc-initiating contact 3, thereby achieving the best arc-extinguishing effect. The structure is simple and highly practical.

[0022] In this embodiment, a movable support, a contact support 11, and multiple swing arms 5 are also included. Multiple moving contacts 1 are mounted on the movable support. Support holes 9, matching the ends of the movable support, are provided on both sides of the switch frame 10. The movable support is hinged to the switch frame 10 through the support holes 9. The contact support 11 is fixed to the lower part of the switch frame 10, and the movable support is located above the contact support 11. The lower end of each swing arm 5 is hinged to the contact support 11, and the upper end of each swing arm 5 is hinged to the movable support. The multiple moving contacts 1 can rotate synchronously for adjustment. This configuration achieves synchronous rotation and adjustment of the multiple moving contacts 1, resulting in a simple structure and convenient operation.

[0023] In this embodiment, a grounding stationary contact 64 is also included, which is connected to the switch frame 10. The connection between the grounding stationary contact 64 and the switch frame 10 can discharge static electricity on the equipment in a timely manner, preventing abnormal electrical faults in the equipment and improving safety and reliability.

[0024] In this embodiment, a protective cover 8 is also included, which is hinged to both sides of the switch frame 10. The protective cover 8 can isolate internal electric arcs and magnetic fields, making the equipment safer and more reliable to operate.

[0025] Working principle: When the load switch is in the opening process, under high voltage and high current conditions, an electric arc will appear between the stationary contact 4 and the moving contact 1. The arc extinguishing device 2 introduces the arc current of the moving contact 1 into the arc extinguishing device 2 through the arc-initiating contact 3, and forms a current loop with the stationary contact 4. On the one hand, the arc energy is greatly reduced after the arc current passes through the current-carrying element in the arc extinguishing device 2. On the other hand, the current flowing through the coil inside the arc extinguishing device 2 forms a strong magnetic field. Under the action of the magnetic field, the arc is rapidly elongated in the coil. When the current crosses zero, the arc is quickly extinguished, thereby shortening the arcing time between the stationary contact 4 and the moving contact 1, and greatly improving the breaking capacity of the load switch.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rotary arc-extinguishing load switch, characterized in that, The switch includes a switch frame, a stationary contact base, a moving contact, a stationary contact, and an arc-extinguishing device. The stationary contact base is disposed on the upper part of the switch frame. The stationary contact and the arc-extinguishing device are both disposed on the stationary contact base. The arc-extinguishing device is provided with an arc-inducing contact. There are multiple moving contacts, which are integrally formed and rotatably disposed on the switch frame. The moving contacts are disposed opposite to the arc-inducing contacts.

2. The rotary arc-extinguishing load switch according to claim 1, characterized in that, It also includes a movable support, a contact support, and multiple swing arms. The multiple moving contacts are disposed on the movable support. Support holes matching the two ends of the movable support are opened on both sides of the switch frame. The movable support is hinged to the switch frame through the support holes. The contact support is fixed to the lower part of the switch frame. The movable support is located above the contact support. The lower end of the swing arm is hinged to the contact support, and the upper end of the swing arm is hinged to the movable support. The multiple moving contacts can be rotated and adjusted synchronously.

3. The rotary arc-extinguishing load switch according to claim 1, characterized in that, It also includes a grounding stationary contact, which is connected to the switch frame.

4. The rotary arc-extinguishing load switch according to claim 1, characterized in that, It also includes a protective cover, which is hinged to the switch frame on both sides.

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