An injury prevention main contact type switch device
By combining the design of snap-fit and clamp-type moving contacts, the safe transfer of arc energy in the switching equipment is realized, solving the problem of main contact burnout in the existing technology and improving the short-term withstand capability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU DAQO KFINE ELECTRIC
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-07
AI Technical Summary
Existing switchgear cannot effectively transfer arc energy during power grid failures or emergencies, resulting in burnt main contacts and affecting short-term withstand capability.
The switchgear adopts a damage-resistant main contact type, combined with snap-fit and clamp-type moving contacts. By separating the moving arc contact from the stationary arc contact, the arc energy is safely transferred, avoiding burn-out of the moving or stationary main contacts.
It effectively avoids the burning of the main contacts, improves the current carrying capacity of the switching equipment, and ensures safe disconnection under short circuit and overload conditions.
Smart Images
Figure CN224472398U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of switchgear, specifically a damage-resistant main contact type switchgear. Background Technology
[0002] In new energy systems, during grid faults or emergencies, switching equipment needs to withstand a certain overload current or a certain amplitude of short-circuit current for a short period of time without damage. Every time the switching equipment is disconnected under load, an electric arc is generated, and the contacts will burn out, affecting the short-circuit withstand capability. Currently, there are moving contact structures that combine clamping and snapping types in existing technologies, but they still cannot solve the problem of electric arc energy transfer when the switch is disconnected. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a damage-resistant main contact type switchgear to solve the aforementioned problems.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution.
[0005] A damage-resistant main contact type switchgear includes a moving contact assembly and a stationary contact assembly, which are correspondingly arranged. The moving contact assembly includes a snap-fit moving contact, a clamping moving contact, a contact support, and a shaft A. The clamping moving contact is disposed on both sides of the snap-fit moving contact. The shaft A passes through both the snap-fit moving contact and the clamping moving contact and is fixed to the contact support. The snap-fit moving contact includes a compression spring, a flexible connection structure, a moving arc contact, and a moving main contact. The spring extends from the back of the snap-fit moving contact and connects to the contact support. The flexible connection structure is located within the contact support and extends to the bottom of the snap-fit moving contact. The moving arc contact is located at the upper part of the snap-fit moving contact and corresponds to the stationary contact assembly. The moving main contact is located in the middle of the snap-fit moving contact and corresponds to the stationary contact assembly. The clamping moving contact is mainly used to carry the operating current and the overcurrent generated during short circuits, and can withstand being repelled for a certain period of time during short circuits. The snap-fit moving contact is mainly used to carry the operating current and the breaking current. Each time the switchgear breaks under load, the stationary arc contact and the moving arc contact are the last to separate during the opening, ensuring the safe transfer of arc energy during the breaking of the switchgear and avoiding burnout of the moving main contact or the stationary main contact, which would affect the current carrying capacity.
[0006] Preferably, the stationary contact assembly is provided with a stationary arc contact, a stationary main contact, and a convex contact.
[0007] Preferably, the stationary arc contact is located on the upper part of the stationary contact assembly and corresponds to the position of the moving arc contact; the stationary main contact is located in the middle of the stationary contact assembly and corresponds to the position of the moving main contact; and the convex contact is located on both sides of the stationary main contact and corresponds to the position of the clamping moving contact.
[0008] Preferably, the clamping moving contact includes a leaf spring, shaft B, and clamping body.
[0009] Preferably, shaft B connects the fixed leaf spring and the clamping body.
[0010] Preferably, the leaf spring is provided with holes A and B.
[0011] Preferably, hole A corresponds to connecting shaft B.
[0012] Preferably, the hole B corresponds to the snap-fit shaft A.
[0013] Preferably, the contact support is provided with boss A and boss B.
[0014] Preferably, boss A and boss B are used for the upper and lower ends of the limiting clamping moving contact, respectively.
[0015] Compared to existing technologies, this utility model discloses a damage-resistant main contact type switchgear, including a moving contact assembly and a stationary contact assembly, which work together to function. The clamping moving contact is mainly used to carry the operating current and the overcurrent generated during short circuits, and can withstand being repelled for a certain period of time during short circuits. The snap-fit moving contact is mainly used to carry the operating current and the breaking current. Each time the switchgear breaks under load, the stationary arc contact and the moving arc contact are the last to separate during the opening, ensuring the safe transfer of arc energy during the breaking of the switchgear and avoiding burnout of the moving or stationary main contacts, which would affect the current carrying capacity. Attached Figure Description
[0016] Figure 1 This is a structural schematic diagram of the damage-resistant main contact type switchgear of this utility model;
[0017] Figure 2 This is a schematic diagram of the moving contact assembly of this utility model;
[0018] Figure 3 This is a schematic diagram of the moving contact assembly of this utility model;
[0019] Figure 4 This is a cross-sectional schematic diagram of the moving contact assembly of this utility model;
[0020] Figure 5 This is a schematic diagram showing the structural position of the leaf spring of this utility model;
[0021] Figure 6 This is a side sectional view of the structure of the snap-fit moving contact of this utility model;
[0022] Figure 7 This is a side sectional view of the structure of the clamping moving contact of this utility model.
[0023] Figure 8 This is a schematic diagram of the structure of the leaf spring of this utility model;
[0024] Figure 9 This is a schematic diagram of the contact support structure of this utility model;
[0025] Figure 10 This is a schematic diagram of the structure of the stationary contact assembly of this utility model;
[0026] Figure 11 This is a cross-sectional view of the structure and operation of the damage-resistant main contact type switchgear of this utility model;
[0027] Figure 12 This is a cross-sectional view of the structure and operation of the damage-resistant main contact type switchgear of this utility model;
[0028] Figure 13 This is a cross-sectional view of the structure and operation of the damage-resistant main contact type switchgear of this utility model. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0030] A damage-resistant main contact type switchgear includes a moving contact assembly 1 and a stationary contact assembly 2, which are correspondingly arranged. The moving contact assembly 1 includes a snap-fit moving contact 11, a clamping moving contact 12, a contact support 13, and a shaft A14. The clamping moving contact 12 is disposed on both sides of the snap-fit moving contact 11. The shaft A14 passes through both the snap-fit moving contact 11 and the clamping moving contact 12 and is fixed on the contact support 13. The snap-fit moving contact 11 includes a compression spring 111, a flexible connection structure 112, and a moving arc contact 11. 3. Moving main contact 114: The compression spring 111 extends from the back of the snap-fit moving contact 11 and connects to the contact support 13. The compression spring 111 applies a forward force to the snap-fit moving contact 11, allowing the snap-fit moving contact 11 to rotate around axis A14. The flexible connection structure 112 is disposed within the contact support 13 and extends to the bottom of the snap-fit moving contact 11. The moving arc contact 113 is disposed on the upper part of the snap-fit moving contact 11 and corresponds to the stationary contact assembly 2. The moving main contact 114 is disposed in the middle of the snap-fit moving contact 11 and corresponds to the stationary contact assembly 2.
[0031] The stationary contact assembly 2 is provided with a stationary arc contact 21, a stationary main contact 22, and a convex contact 23. The stationary arc contact 21 is located on the upper part of the stationary contact assembly 2 and corresponds to the position of the moving arc contact 113. The stationary main contact 22 is located in the middle of the stationary contact assembly 2 and corresponds to the position of the moving main contact 114. The convex contact 23 is located on both sides of the stationary main contact 22 and corresponds to the position of the clamping moving contact 12.
[0032] The clamping movable contact 12 includes a leaf spring 121, a shaft B122, and a clamping body 123. The shaft B122 connects and fixes the leaf spring 121 and the clamping body 123. The leaf spring 121 is used to keep the clamping body 123 in a clamped state at all times. The leaf spring 121 is provided with holes A1211 and B1212. Hole A1211 is connected to shaft B122, and hole B1212 is engaged with shaft A14. The contact support 13 is provided with bosses A131 and B132. Bosses A131 and B132 are used to limit the upper and lower ends of the clamping movable contact 12, respectively, and together with shaft B122, restrict the movement of the clamping movable contact 12.
[0033] Working mode: such as Figure 11 As shown, during the switch closing process, the moving arc contact 113 and the stationary arc contact 21 make contact first. At this time, the moving main contact 114 does not make contact with the stationary main contact 22, and the clamping body 123 does not make contact with the convex contact 23.
[0034] like Figure 12 , 13 As shown, the switch is then closed, the moving arc contact 113 separates from the stationary arc contact 21, the clamping body 123 contacts and clamps the convex contact 23, the moving main contact 114 does not contact the stationary main contact 22, and together they carry the working current or the overload current and short-circuit current for a short period of time.
[0035] Subsequently, during the switch opening process, which is the opposite of the switch closing process described above, the moving main contact 114 does not separate from the stationary main contact 22, and the clamping body 123 separates from the convex contact 23; the moving arc contact 113 separates from the stationary arc contact 21 last, which is used for the transfer of arc energy when the switch is broken.
[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0037] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A damage-resistant main contact type switchgear, characterized in that: The device includes a moving contact assembly (1) and a stationary contact assembly (2). The moving contact assembly (1) and the stationary contact assembly (2) are correspondingly arranged. The moving contact assembly (1) includes a snap-fit moving contact (11), a clamping moving contact (12), a contact support (13), and a shaft A (14). The clamping moving contact (12) is arranged on both sides of the snap-fit moving contact (11). The shaft A (14) passes through both the snap-fit moving contact (11) and the clamping moving contact (12) and is fixed on the contact support (13). The snap-fit moving contact (11) includes a compression spring (111). The soft connection structure (112), the moving arc contact (113), and the moving main contact (114) are provided. The compression spring (111) extends from the back of the snap-fit moving contact (11) and is connected to the contact support (13). The soft connection structure (112) is located inside the contact support (13) and extends to the bottom of the snap-fit moving contact (11). The moving arc contact (113) is located on the upper part of the snap-fit moving contact (11) and corresponds to the stationary contact assembly (2). The moving main contact (114) is located in the middle of the snap-fit moving contact (11) and corresponds to the stationary contact assembly (2).
2. The damage-resistant main contact type switchgear according to claim 1, characterized in that: The stationary contact assembly (2) is provided with a stationary arc contact (21), a stationary main contact (22), and a convex contact (23).
3. The damage-resistant main contact type switchgear according to claim 2, characterized in that: The stationary arc contact (21) is located on the upper part of the stationary contact assembly (2) and corresponds to the position of the moving arc contact (113). The stationary main contact (22) is located in the middle of the stationary contact assembly (2) and corresponds to the position of the moving main contact (114). The convex contact (23) is located on both sides of the stationary main contact (22) and corresponds to the position of the clamping moving contact (12).
4. The damage-resistant main contact type switchgear according to claim 1, characterized in that: The clamping moving contact (12) includes a leaf spring (121), shaft B (122), and clamping body (123).
5. The damage-resistant main contact type switchgear according to claim 4, characterized in that: The shaft B (122) connects the fixed leaf spring (121) and the clamping body (123).
6. The damage-resistant main contact type switchgear according to claim 5, characterized in that: The leaf spring (121) is provided with hole A (1211) and hole B (1212).
7. The damage-resistant main contact type switchgear according to claim 6, characterized in that: The hole A (1211) corresponds to the connecting shaft B (122).
8. The damage-resistant main contact type switchgear according to claim 7, characterized in that: The hole B (1212) corresponds to the snap-fit shaft A (14).
9. The damage-resistant main contact type switchgear according to claim 1, characterized in that: The contact support (13) is provided with boss A (131) and boss B (132).
10. The damage-resistant main contact type switchgear according to claim 9, characterized in that: The boss A (131) and boss B (132) are respectively used for the upper and lower ends of the limiting clamping moving contact (12).