Contact structure for density relay
By adopting a concave-convex structure contact design in the density relay, the problem of poor contact of the existing density relay contacts is solved, and better contact reliability and conduction performance are achieved.
Patent Information
- Application Number
- CN202421651924.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The moving and static contacts of existing density relays adopt cylindrical structures, which leads to the problem of poor contact.
The contact design adopts a concave-convex structure. The fixed contact is concave, the action contact is convex, the contact groove is a semicircular groove, and the contact is a hemispherical shape, which increases the contact area and reduces the contact resistance.
The phenomenon of poor contact is reduced, the conduction area is increased, and the contact reliability of the contacts is improved.
Smart Images
Figure CN223321194U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of density relays, in particular to a contact structure for a density relay. Background Art
[0002] In the field of power switches, SF6 (sulfur hexafluoride) density relays are important protection and control components in this field. To ensure the reliability of power switch operation, the pressure of SF6 gas in the power switch must be monitored regularly. SF6 density relays must be installed in the power switch to detect changes in SF6 gas density in the power switch.
[0003] The magnetic assist switch used in the existing density relay has a cylindrical structure for its moving and static contacts, which are in linear contact and often have poor contact and non-conduction phenomena. Utility Model Content
[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide a contact structure for a density relay.
[0005] The purpose of the utility model is achieved through the following technical solutions: a contact structure for a density relay, comprising an insulating base, a first fixed arm fixed on the insulating base, the first fixed arm being connected to a second fixed arm, and the second fixed arm being provided with a first fixed contact and a second fixed contact; a first movable arm and a second movable arm being fixed on the insulating base, a first action contact being fixed on the first movable arm, and a second action contact being fixed on the second movable arm; the first fixed contact and the second fixed contact both comprising a first fixing member and a contact slot provided on the first fixing member; the first action contact and the second action contact both comprising a second fixing member and a contact provided on the second fixing member.
[0006] Furthermore, the contact slot matches the shape of the contact.
[0007] Furthermore, the contact groove is a semicircular groove; and the contact is a hemisphere.
[0008] Compared with the prior art, the present invention has the following beneficial effects:
[0009] The dynamic and static contacts of the utility model adopt a concave-convex structure, the fixed contact is concave, and the actuating contact is convex. In this way, when the dynamic and static contacts are in contact, they form a concave surface and a convex surface instead of a line, which reduces the contact resistance and reduces the phenomenon of poor contact. At the same time, the semicircular groove and the hemisphere increase the contact area and the conduction area. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural diagram of the utility model;
[0011] Figure 2 It is a cross-sectional view of the fixed contact and the actuating contact of the utility model. DETAILED DESCRIPTION
[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0013] like Figure 1-2 As shown, a contact structure for a density relay includes an insulating base 5, to which a first fixed arm 41 is fixed, the first fixed arm 41 being connected to a second fixed arm 42, and the second fixed arm 42 being provided with a first fixed contact 11 and a second fixed contact 12; a first movable arm 31 and a second movable arm 32 are fixed to the insulating base 5, the first movable arm 31 being provided with a first actuating contact 21, and the second movable arm 32 being provided with a second actuating contact 22; the first fixed contact 11 and the second fixed contact 12 each include a first fixing member 111 and a contact slot 112 provided on the first fixing member 111; the first actuating contact 21 and the second actuating contact 22 each include a second fixing member 211 and a contact 212 provided on the second fixing member 211.
[0014] The contact groove 112 is matched with the shape of the contact 212. The contact groove 112 is a semicircular groove; the contact 212 is a hemisphere. The utility model has a simple structure. At the same time, the dynamic and static contacts adopt a concave-convex structure. The fixed contact is concave and the action contact is convex. In this way, when the dynamic and static contacts contact, they are not in a line, but a concave surface and a convex surface, which reduces the contact resistance and reduces the phenomenon of poor contact. At the same time, the semicircular groove and the hemisphere increase the contact area and increase the conduction area.
[0015] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make slight modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.
Claims
1. A contact structure for a density relay, characterized in that: The invention comprises an insulating base (5), a first fixed arm (41) being fixed on the insulating base (5), the first fixed arm (41) being connected to a second fixed arm (42), and the second fixed arm (42) being provided with a first fixed contact (11) and a second fixed contact (12); A first movable arm (31) and a second movable arm (32) are fixed on the insulating base (5); a first action contact (21) is fixed on the first movable arm (31); and a second action contact (22) is fixed on the second movable arm (32); The first fixed contact (11) and the second fixed contact (12) both comprise a first fixing member (111) and a contact slot (112) provided on the first fixing member (111); The first action contact (21) and the second action contact (22) both comprise a second fixing member (211) and a contact (212) arranged on the second fixing member (211).
2. The contact structure for a density relay according to claim 1, characterized in that: The contact slot (112) matches the shape of the contact (212).
3. The contact structure for a density relay according to claim 2, characterized in that: The contact groove (112) is a semicircular groove; The contact (212) is a hemisphere.