Outdoor high-voltage alternating-current isolating switch
By designing elastically function static contacts and optimized structures, the problem of insufficient contact between the static contacts in the traditional isolating switch is solved, and more stable electrical connection and stronger impact resistance are achieved, and the overall performance of the outdoor high-voltage AC isolating switch is improved.
Patent Information
- Application Number
- CN202421472039.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-06-26
AI Technical Summary
In traditional isolating switches, the electrical connection between the movable knife and the static contact depends on the pressure spring on the movable knife to provide pressure. The static contact only bears the conductive effect, resulting in unreliable contacts and affecting the stability of the electrical connection.
Designing elastically functional static contacts, using chromium zirconium beryllium bronze alloy material, combined with a double-layer symmetrical design of elastic clamps and a double blade vertical opening structure, provides elastic pressure to enhance contact reliability between the movable knife and the static contact, and improve mechanical strength by optimizing the insulator and bottom plate structure.
It realizes more reliable contact between the movable knife and the static contact, improves the stability and impact resistance of the electrical connection, and ensures the operating flexibility and service life of the switch.
Smart Images
Figure CN223296718U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of isolating switches, in particular to an outdoor high-voltage AC isolating switch. Background Art
[0002] The electrical connection between the static contact and the moving knife of a traditional isolating switch relies on the pressure provided by the compression spring on the moving knife to ensure the effectiveness of the electrical connection between the moving contact and the moving knife. The static contact only plays the role of conducting electricity and does not participate in providing pressure. It only bears the pressure generated by the moving knife.
[0003] We have proposed an outdoor high-voltage AC disconnector. By designing a static contact with elastic function, the contact between the moving blade and the static contact is made more reliable, ensuring a further stable electrical connection. Utility Model Content
[0004] The purpose of the utility model is to provide an outdoor high-voltage AC disconnector to achieve more reliable contact between the movable blade and the static contact, thereby ensuring a further stable effect of the electrical connection.
[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: an outdoor high-voltage AC disconnector, comprising a base plate, wherein insulators are fixedly connected to both sides of the upper end of the base plate, the upper end of the left insulator is fixedly connected to a power terminal block, and the upper end of the right insulator is fixedly connected to a load terminal block, the upper end of the power terminal block is fixedly connected to a static contact, the upper end of the load terminal block is fixedly connected to a support, the upper end of the support is hinged to a movable blade, and the upper end of the movable blade is equipped with an operating handle;
[0006] The static contact comprises a connecting plate, both ends of which are fixedly connected with elastic clamping plates of double-layer symmetrical design, and the lower end of the connecting plate is provided with double openings.
[0007] Preferably, the movable knife is configured as a double-blade vertically open structure, and the blade is configured as a double-layer, cold-drawn, rounded T2 copper busbar.
[0008] Preferably, the power connection board and the load connection board are both configured as rounded corner rows and double mounting hole structures.
[0009] Preferably, the connection terminals on the power connection board and the load connection board and the blades on the movable knife are all surface tinned with a coating thickness of not less than 12um, and the static contacts and the movable contacts on the movable knife are partially silver plated with a coating thickness of not less than 20um.
[0010] Preferably, the insulator is an outdoor high-strength porcelain glaze insulator designed with a specific number and spacing of sheds.
[0011] Preferably, the bottom plate is designed in a "channel" shape and formed by one-time stamping with a 4-mm cold plate.
[0012] Preferably, both the upper and lower moving contacts of the moving knife adopt a double-spring crimping method, and the contact pressures are not less than 150 N and 210 N respectively.
[0013] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:
[0014] First, in the present utility model, by making the static contact with chromium zirconium beryllium bronze alloy, it has good elasticity. When deformation occurs, elastic pressure will be generated, which enables the static contact to provide elastic pressure while participating in conduction, thus ensuring a more reliable contact between the moving knife and the static contact, further stabilizing the electrical connection. The static contact is designed with two pairs of contact points, making the electrical connection between the moving knife and the static contact more reliable and having stronger impact resistance.
[0015] Second, in the present utility model, by setting the moving knife as a double-blade vertically opening structure and the blade as a double-layer, cold-drawn, rounded T-shaped copper row, it has excellent electrical conductivity, stable mechanical strength, and flexible operation.
[0016] Third, in the present utility model, by designing the bottom plate in a "channel" shape and forming it by one-time stamping with a cold plate, the mechanical strength of the base is improved, effectively avoiding the influence of the deformation of the bottom plate on the switch structure during on-site installation, and ensuring the effectiveness of the switch's opening and closing. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a three-dimensional view of the structure of the present utility model;
[0018] Figure 2 is an open-state diagram of the disconnecting switch of the present utility model;
[0019] Figure 3 is a rear-view cross-sectional view of the present utility model;
[0020] Figure 4 is a three-dimensional view of the static contact of the present utility model.
[0021] Among them: 1. Bottom plate; 2. Insulator; 3. Power supply wiring board; 4. Load wiring board; 5. Static contact; 50. Connecting plate; 51. Elastic splint; 6. Support; 7. Moving knife; 8. Operating handle. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the specific embodiments of the present invention. Obviously, the specific embodiments described are only part of the present invention, not all of it. Based on the specific embodiments of the present invention, all other specific embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.
[0023] See also Figure 1-4 , an outdoor high-voltage AC disconnect switch, comprising a base plate 1, insulators 2 are fixedly connected to both sides of the upper end of the base plate 1, the upper end of the left insulator 2 is fixedly connected to a power terminal block 3, the upper end of the right insulator 2 is fixedly connected to a load terminal block 4, the upper end of the power terminal block 3 is fixedly connected to a static contact 5, the upper end of the load terminal block 4 is fixedly connected to a support 6, the upper end of the support 6 is hinged with a movable knife 7, and the upper end of the movable knife 7 is installed with an operating handle 8;
[0024] The static contact 5 includes a connecting plate 50 , with double-layer symmetrical elastic clamping plates 51 fixedly connected to both ends of the connecting plate 50 , and a lower end of the connecting plate 50 is provided with double openings.
[0025] Through the above technical solution, by making the static contact 5 of chromium-zirconium-beryllium bronze alloy, which has good elasticity, elastic pressure will be generated while it is deformed, so that the static contact 5 provides elastic pressure while participating in electrical conduction, thereby ensuring that the contact between the movable blade 7 and the static contact 5 is more reliable and the electrical connection is further stabilized. The static contact 5 is designed with two pairs of contact points, which makes the electrical connection between the movable blade 7 and the static contact 5 more reliable and has stronger impact resistance.
[0026] Specifically, the movable knife 7 is configured as a double-blade vertically open structure, and the blades are configured as double-layer, cold-drawn, rounded T2 copper bars.
[0027] The above technical solution has excellent conductive performance, stable mechanical strength and flexible operation.
[0028] Specifically, the power terminal block 3 and the load terminal block 4 are both configured as rounded corner rows and double mounting hole structures.
[0029] The above technical solution makes the electrical contact more stable and reliable.
[0030] Specifically, the connection terminals on the power connection board 3 and the load connection board 4 and the blades on the movable knife 7 are all surface tin-plated with a coating thickness of not less than 12 μm, and the static contact 5 and the movable contact on the movable knife 7 are partially silver-plated with a coating thickness of not less than 20 μm.
[0031] Through the above technical solution, while ensuring the corrosion protection of conductive parts, the silver-to-silver contact ensures lower loop resistance, excellent conductivity and long service life.
[0032] Specifically, the insulator 2 is an outdoor high-strength porcelain glaze insulator designed with a specific number and spacing of sheds.
[0033] Through the above technical solution, the pollution level is no less than level 4, the insulation level is high, the mechanical strength is large, and the impact resistance is strong, which ensures the stability and reliability of the disconnector operation.
[0034] Specifically, the bottom plate 1 is designed in a "J" shape and is formed by one-time stamping with a 4mm cold plate.
[0035] Through the above technical solution, the mechanical strength of the base is improved, the influence of the base plate deformation on the switch structure during on-site installation is effectively avoided, and the effectiveness of the switch opening and closing is ensured.
[0036] Specifically, the upper and lower moving contacts of the movable blade 7 are both pressed by double springs, and the contact pressures are not less than 150N and 210N respectively.
[0037] Through the above technical solution, the contact pressure between the moving and static contacts 5 is guaranteed, so that the electrical connection contact resistance is minimized and the operation is reliable.
[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0039] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. An outdoor high-voltage AC disconnect switch, comprising a base plate (1), wherein both sides of the upper end of the base plate (1) are fixedly connected to insulators (2), the upper end of the left insulator (2) is fixedly connected to a power terminal block (3), and the upper end of the right insulator (2) is fixedly connected to a load terminal block (4), characterized in that: The upper end of the power supply connection board (3) is fixedly connected with a static contact (5). The upper end of the load connection board (4) is fixedly connected with a support (6). The upper end of the support (6) is hinged with a moving blade (7). The upper end of the moving blade (7) is equipped with an operating handle (8). The static contact (5) includes a connecting plate (50). Both ends of the connecting plate (50) are fixedly connected with elastically clamping plates (51) designed symmetrically in double layers. The lower end of the connecting plate (50) is provided with double openings.
2. The outdoor high-voltage AC disconnect switch according to claim 1, characterized in that: The moving blade (7) is designed as a double - blade vertically - opening structure. The blades are made of double - layer, cold - drawn, rounded - corner T2 copper bars.
3. The outdoor high-voltage AC disconnect switch according to claim 1, characterized in that: Both the power supply connection board (3) and the load connection board (4) are designed as rounded - corner rows and double - mounting - hole structures.
4. The outdoor high-voltage AC disconnect switch according to claim 1, characterized in that: The wiring terminals on the power supply connection board (3) and the load connection board (4) and the blades on the moving blade (7) all adopt a surface - tinning process, and the coating thickness is not less than 12 μm. The static contact (5) and the moving contact on the moving blade (7) adopt a partial - silver - plating process, and the coating thickness is not less than 20 μm.
5. The outdoor high-voltage AC disconnect switch according to claim 1, characterized in that: The bottom plate (1) is designed in a "U" shape and is formed by one - time stamping with a 4 - mm cold plate.
6. The outdoor high-voltage AC disconnect switch according to claim 1, characterized in that: Both the upper and lower moving contacts of the moving blade (7) adopt a double - spring crimping method, and the contact pressures are not less than 150 N and 210 N respectively.