Static contact structure for grounding switch
By designing an isolated connection conductor to wrap the static contact body and form a ground switch static contact structure with an independent module, the problem of inconvenient maintenance of the static contact structure in the prior art is solved, a more efficient maintenance process and a longer service life are achieved, and ablation resistance is improved.
Patent Information
- Application Number
- CN202421463588.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The static contact structure of the existing grounding switch is inconvenient to repair. You need to first remove the switch casting conductor and then remove the static contact. The process is cumbersome and it is easy to damage the components and reduce the maintenance efficiency.
A static contact structure for grounding switch is designed, and the static contact body is wrapped and isolated from the switch casting conductor through an isolating connection conductor to form an independent module, and the annular shield, the annular edge of the isolating connection conductor and the switch casting conductor are detachably connected together through multiple connecting bolts.
Improves maintenance efficiency, reduces the disassembly of unnecessary components, reduces the possibility of damage, extends the service life of static contacts, and improves ablation resistance through arc-shaped lifting and copper-tungsten materials.
Smart Images
Figure CN222851277U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of grounding switches, in particular to a static contact structure for a grounding switch. Background Art
[0002] The static contacts of existing grounding switches are mostly installed on the cast conductor in parts, not forming an independent whole, and the connecting bolts are mostly set inside the cast conductor. Therefore, when repairing, it is necessary to first remove the cast conductor from the switch housing and then remove the static contact. The process is very cumbersome and it is easy to damage the parts, causing unnecessary waste and reducing maintenance efficiency. Utility Model Content
[0003] The utility model provides a static contact structure for a grounding switch, which solves the problem that the static contact structure of the existing grounding switch is inconvenient to maintain.
[0004] The utility model can be realized through the following technical solutions:
[0005] A static contact structure for a grounding switch comprises an isolating connecting conductor of a basin-shaped structure, wherein a static contact body is arranged inside the isolating connecting conductor, wherein the inner side of the annular edge of the static contact body can be detachably connected to a switch casting conductor, and the outer side can be detachably connected to an annular shielding member, wherein an opening of the annular shielding member cooperates with the static contact body.
[0006] Further, the annular shield, the annular edge of the isolating connecting conductor and the switch casting conductor are detachably connected together by a plurality of connecting bolts.
[0007] Furthermore, the static contact body includes a contact seat that cooperates with the internal cavity of the isolated connecting conductor, a plurality of contact finger springs are evenly inserted into the open end of the contact seat, a static arc contact is connected to its central position, and the non-open end of the contact seat can be detachably connected to the bottom of the isolated connecting conductor, and a plurality of heat dissipation holes are correspondingly arranged on the connecting surfaces of the two.
[0008] Furthermore, an arc-shaped protrusion is provided along the inner edge of the annular shielding member, and the arc-shaped protrusion extends toward the contact finger spring piece, and a notch matching the arc-shaped protrusion is provided at the end of each contact finger spring piece.
[0009] Furthermore, the arc-shaped protrusion of the annular shielding member and the end of the contact finger spring are both made of copper-tungsten material.
[0010] The beneficial technical effects of the utility model are:
[0011] 1. The static contact body is wrapped and isolated from the switch casting conductor by using an isolating connecting conductor to form an independent module, and the independent module is installed on the switch casting conductor in a detachable manner. Compared with the existing static contact structure, it is not necessary to disassemble the switch casting conductor first and then disassemble the static contact body during maintenance, thereby greatly improving the maintenance efficiency, reducing the disassembly of unnecessary parts, reducing the possibility of damage, and extending the service life of the static contact.
[0012] 2. An annular shielding member with an arc-shaped protrusion is designed. The arc-shaped protrusion cooperates with the end of the contact finger spring piece to complete the function of striking the arc to the outside of the static contact and extinguishing the arc by lengthening the arc. At the same time, the arc-shaped protrusion and the end of the contact finger spring piece are made of copper tungsten material to further improve the ability of ablation resistance.
[0013] 3. The whole structure is simple, easy to operate, and has strong marketing value. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the axial cross-section structure of the utility model;
[0015] Figure 2 The overall structure of the utility model is shown in FIG. Figure 1 ;
[0016] Figure 3 The overall structure of the utility model is shown in FIG. Figure 2 ;
[0017] Among them, 1-isolating connection conductor, 2-switch casting conductor, 3-annular shielding part, 4-contact seat, 5-contact finger spring, 6-static arc contact, 7-circular spring, 8-heat dissipation through hole. DETAILED DESCRIPTION
[0018] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings and preferred embodiments.
[0019] like Figure 1-3 As shown, the utility model provides a static contact structure for a grounding switch, including an isolating connection conductor 1 of a basin-shaped structure, a static contact body is arranged inside the isolating connection conductor 1, the inner side of the annular edge of which can be detachably connected to the switch casting conductor 2, and the outer side can be detachably connected to the annular shield 3, and the opening of the annular shield 3 cooperates with the static contact body. In this way, the static contact body is wrapped and isolated from the switch casting conductor 2 by the isolating connection conductor 1 to form an independent module, and the connection part is arranged at the edge of the isolating connection conductor 1. When repairing, the static contact body can be directly removed from the switch casting conductor 2 together with the isolating connection conductor 1, without removing the switch casting conductor, which is very convenient and quick, can significantly improve the maintenance effect, reduce the removal of unnecessary parts, and reduce the possibility of damage.
[0020] The static contact body includes a contact seat 4 that cooperates with the internal cavity of the isolated connecting conductor 1. A plurality of contact finger springs 5 are evenly inserted at the open end of the contact seat 4. These contact finger springs 5 form a circle, and a static arc contact 6 is connected at its central position. The bottom and top of the outer side are both equipped with circular springs 7 to achieve elastic contact with the moving contact to reduce the impact force of the collision; the non-open end of the contact seat 4 can be detachably connected to the bottom of the isolated connecting conductor 1, and can be connected by bolts, and a plurality of heat dissipation holes 8 are correspondingly arranged on the connecting surfaces of the two, so as to dissipate the heat generated when the moving and static contacts are closed or opened in time to avoid heat accumulation and contact burning.
[0021] Taking into account the convenience of disassembly, we use multiple connecting bolts to detachably connect the annular shielding part 3, the annular edge of the isolation connecting conductor 1 and the switch casting conductor 2. A recess that matches the isolation connecting conductor 1 can be provided inside the switch casting conductor 2, and then a plurality of through holes are evenly opened on the annular shielding part 3 and the annular edge of the isolation connecting conductor 1, and a blind hole with an internal thread is opened on the step surface of the recess. The three can be detachably connected together by using bolts to pass through the through holes and match with the corresponding threads inside the blind holes.
[0022] In order to increase the ablation resistance of the contact, we provide an arc-shaped protrusion along the inner edge of the annular shielding member 3, which extends in the direction of the contact finger spring piece, and a notch that matches the arc-shaped protrusion is provided at the end of each contact finger spring piece 5, so that the arc on the contact finger spring piece 5 can be led out to the outside of the static contact structure through the arc-shaped protrusion, which is more conducive to heat dissipation. At the same time, the arc-shaped protrusion of the annular shielding member 3 and the end of the contact finger spring piece 5 are made of copper-tungsten material. The arc generated during the opening and closing process is mainly concentrated on the end of the contact finger spring piece 5. By utilizing the high temperature resistance of the copper-tungsten material, the overall ablation resistance of the static contact can be further improved.
[0023] Although specific embodiments of the present invention are described above, those skilled in the art should understand that these are merely examples and that various changes or modifications may be made to these embodiments without departing from the principles and essence of the present invention. Therefore, the scope of protection of the present invention is limited by the appended claims.
Claims
1. A static contact structure for a grounding switch, characterized in that: It comprises an isolating connecting conductor with a basin-shaped structure, wherein a stationary contact body is arranged inside the isolating connecting conductor, the inner side of the annular edge of which can be detachably connected to the switch casting conductor, and the outer side can be detachably connected to the annular shielding member, and the opening of the annular shielding member cooperates with the stationary contact body.
2. The static contact structure for a grounding switch according to claim 1, characterized in that: The annular shield, the annular edge of the isolating connecting conductor and the switch casting conductor are detachably connected together by a plurality of connecting bolts.
3. The static contact structure for the grounding switch according to claim 2, characterized in that: The static contact body includes a contact seat that cooperates with the internal cavity of the isolated connecting conductor, a plurality of contact finger springs are evenly inserted at the open end of the contact seat, a static arc contact is connected at its central position, and the non-open end of the contact seat can be detachably connected to the bottom of the isolated connecting conductor, and a plurality of heat dissipation holes are correspondingly arranged on the connecting surfaces of the two.
4. The static contact structure for a grounding switch according to claim 1, characterized in that: An arc-shaped protrusion is arranged along the inner edge of the annular shielding member, and the arc-shaped protrusion extends toward the contact finger spring piece, and a notch matching the arc-shaped protrusion is arranged at the end of each contact finger spring piece.
5. The static contact structure for a grounding switch according to claim 4, characterized in that: The arc-shaped protrusion of the annular shielding member and the end of the contact finger spring are both made of copper tungsten material.