Matching structure of moving and static contacts
By designing the matching structure of dynamic and static contacts, including a U-shaped slide table, an operating table and a centering device, the problem of uneven left and right contacts during the advancement of the moving contacts of the vacuum circuit breaker is solved, and stable docking and efficient electrical contacts of the dynamic and static contacts are achieved, and the product's insulation voltage and electrical performance are improved.
Patent Information
- Application Number
- CN202421649931.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-12
AI Technical Summary
During the advancement of the moving contacts of the vacuum circuit breaker, the left and right contacts are prone to irregularity, resulting in the four-point contact becoming 2-point contact, which increases the degree of burning of the contacts.
A matching structure for dynamic and static contacts is designed, including a U-shaped slide table and an operating table, and a centering device is provided on the operating table. The centering device is plugged and cooperated with the static contacts of the circular ring sleeve structure, which can be adjusted 360 degrees, and the clamping force is increased through the annular spring coil and the elastic clamp.
It realizes stable docking between the moving contact and the static contact, increases the clamping force, reduces the contact resistance, and can withstand the impact of peak current during short circuits. It does not generate eddy current heating for a long time when operating withstand a single live operation, and improves the insulation voltage withstand level.
Smart Images
Figure CN222939813U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, and specifically relates to a matching structure of moving and static contacts. Background Technique
[0002] A vacuum circuit breaker is a circuit breaker that uses a vacuum state for arc extinguishing and insulation. Vacuum circuit breakers are mainly used in 10 - 35 kV power systems, can operate frequently, continuously break the rated current more than ten thousand times, and can also continuously break dozens or even hundreds of times under the rated short - circuit breaking current. It can be used for the protection and control of electrical equipment in industrial and mining enterprises, power plants, and substations. The basic structure consists of a vacuum interrupter (vacuum switch tube), an insulating support, and an operating mechanism. It has the advantages of small volume, light weight, being suitable for frequent operation, and no need for maintenance of arc extinguishing, and is widely used in the distribution network.
[0003] Although the moving contact of the vacuum circuit breaker has a certain function of vertical adjustment and centering, the adjustment range is only about 2 mm. If it exceeds the 2 - mm range, the moving and static contacts cannot be engaged, and even collisions may occur, damaging the contacts. Since the guide rail of the contactor trolley has no left - right guiding function, it is easy for the left and right contacts to be misaligned during the pushing process, changing the original four - point contact to a two - point contact, increasing the degree of contact burnout.
[0004] Therefore, we urgently need to provide a matching structure of moving and static contacts. Content of the Utility Model
[0005] The purpose of the utility model is to provide a matching structure of moving and static contacts to solve the problem that the left and right contacts of the moving contact of the contactor are easy to be misaligned during the pushing process, changing the original four - point contact to a two - point contact, and increasing the degree of contact burnout as mentioned in the above background technique.
[0006] To achieve the above purpose, the utility model provides the following technical solution: A matching structure of moving and static contacts, including a U - shaped sliding table and an operating table. The operating table is installed on the top of the U - shaped sliding table, and a centering device is arranged above the operating table.
[0007] The centering device includes a matching structure and a centering structure.
[0008] The matching structure includes a vacuum interrupter, a moving contact, a static contact head, a connecting sleeve, and a static contact. The vacuum interrupter is installed on the right side of the operating table, the moving contact is installed at the right end of the vacuum interrupter, the static contact head is installed on the right side of the operating table, the connecting sleeve is installed on the left side of the static contact head, and the static contact is installed inside the connecting sleeve and is horizontally corresponding to the moving contact.
[0009] A further improvement is that the moving contact includes a circular ring sleeve, an annular spring ring, and an elastic clamp. The circular ring sleeve is installed on the right side of the vacuum arc extinguishing chamber, and two groups of the annular spring rings are respectively installed on the left and right sides of the circular ring sleeve, and the two elastic clamps are respectively installed on the left and right ends of the circular ring sleeve. The moving contact is pushed into the interior of the connecting sleeve through the centering structure, and its right side contacts the static contact part. The static contact part stretches the elastic clamp and the annular spring ring, and is clamped into the interior of the circular ring sleeve. Then the annular spring ring and the elastic clamp clamp the static contact under the action of their own elasticity, thereby increasing the clamping force between the two.
[0010] A further improvement is that the centering structure includes a bearing seat, a threaded rod, a turntable, and a movable assembly. The bearing seat is installed on the top left side of the U-shaped slide, the threaded rod is rotatably connected to the inside of the bearing seat, the turntable is fixedly connected to the left side of the threaded rod, and the four groups of movable assemblies are respectively installed on the left and right ends of the front and rear sides of the operating table.
[0011] A further improvement is that a threaded hole is formed through the left outer surface of the operating table, and the threaded rod is threadedly connected to the inside of the threaded hole.
[0012] A further improvement is that the moving assembly includes a rotating bearing, a wheel axle, and a wheel, the rotating bearing is installed on the left side of the front bottom of the operating table, the wheel axle is rotatably connected to the inside of the rotating bearing, and the wheel is installed on the front section of the wheel axle. The turntable is rotated to drive the threaded rod to rotate inside the bearing seat, thereby pushing the operating table threadedly connected thereto to slide to the right side in line with the inner wall of the U-shaped slide driven by the outer wheel, thereby pushing the moving contact and the static contact to cooperate and dock.
[0013] A further improvement is that a control panel is installed on the left outer surface of the operating table, the centering device is electrically connected to the control panel, and the operation of the device is controlled by the control panel.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] 1. The matching structure of the moving and static contacts uses a circular ring structure to plug and match the moving contact with the static contact, so that it can be adjusted 360 degrees, increasing the holding force between the moving contact and the static contact, reducing the contact resistance, and being able to withstand the impact of peak current during short circuit. Long-term energized operation does not generate eddy current heating, and is more conducive to the distribution of the electromagnetic field, making the product's insulation withstand voltage level higher.
[0016] 2. The matching structure of the moving and static contacts rotates the turntable, thereby driving the threaded rod to rotate inside the bearing seat, thereby pushing the operating table threadedly connected to it to slide to the right side in accordance with the inner wall of the U-shaped slide driven by the outer wheel, thereby pushing the moving contact and the static contact to match and dock. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is the front view structural schematic diagram of the present utility model;
[0018] Figure 2 This is the front view partial sectional structural schematic diagram of the present utility model;
[0019] Figure 3 This is the split structural schematic diagram of the operating table and the U-shaped sliding table of the present utility model;
[0020] Figure 4 This is of the present utility model Figure 3 The enlarged split structural schematic diagram at position A;
[0021] Figure 5 This is the split structural schematic diagram of the connection part between the moving contact and the static contact of the present utility model.
[0022] In the figure: 1. U-shaped sliding table; 2. Operating table; 301. Vacuum arc extinguishing chamber; 302. Moving contact; 3021. Circular ring sleeve; 3022. Annular spring ring; 3023. Elastic clamp; 303. Static contact head; 304. Connecting sleeve; 305. Static contact; 306. Bearing seat; 307. Threaded rod; 308. Turntable; 309. Moving component; 3091. Rotating bearing; 3092. Wheel axle; 3093. Wheel; 4. Control panel. Specific embodiments
[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0024] Please refer to Figures 1 - 5 , the present utility model provides a technical solution:
[0025] A matching structure of a moving contact and a static contact, including a U-shaped sliding table 1 and an operating table 2. The operating table 2 is installed on the top of the U-shaped sliding table 1, and a centering device is arranged above the operating table 2.
[0026] The centering device includes a matching structure and a centering structure.
[0027] The matching structure includes a vacuum interrupter 301, a moving contact 302, a stationary contact part 303, a connecting sleeve 304, and a stationary contact 305. The vacuum interrupter 301 is installed on the right side of the operating table 2, the moving contact 302 is installed on the right end of the vacuum interrupter 301, the stationary contact part 303 is installed on the right side of the operating table 2, the connecting sleeve 304 is installed on the left side of the stationary contact part 303, and the stationary contact 305 is installed inside the connecting sleeve 304 and corresponds horizontally to the moving contact 302.
[0028] The moving contact 302 includes a circular ring sleeve 3021, an annular spring ring 3022, and an elastic clamp 3023. The circular ring sleeve 3021 is installed on the right side of the vacuum arc chamber 301, and two groups of annular spring rings 3022 are respectively installed on the left and right sides of the circular ring sleeve 3021. Two elastic clamps 3023 are respectively installed on the left and right ends of the circular ring sleeve 3021. The moving contact 302 is pushed into the interior of the connecting sleeve 304 through the centering structure, and its right side contacts the static contact part 303. The static contact part 303 opens the elastic clamp 3023 and the annular spring ring 3022 and is clamped into the interior of the circular ring sleeve 3021. Then the annular spring ring 3022 and the elastic clamp 3023 clamp the static contact 305 under the action of their own elasticity, thereby increasing the clamping force between the two.
[0029] The centering structure includes a bearing seat 306, a threaded rod 307, a turntable 308, and a moving assembly 309. The bearing seat 306 is installed on the top left side of the U-shaped slide 1, the threaded rod 307 is rotatably connected to the inside of the bearing seat 306, the turntable 308 is fixedly connected to the left side of the threaded rod 307, and four groups of moving assemblies 309 are respectively installed on the left and right ends of the front and back sides of the operating table 2. A threaded hole is opened through the left outer surface of the operating table 2, and the threaded rod 307 is threadedly connected to the inside of the threaded hole.
[0030] The moving assembly 309 includes a rotating bearing 3091, a wheel axle 3092, and a wheel 3093. The rotating bearing 3091 is installed on the left side of the front bottom of the operating platform 2. The wheel axle 3092 is rotatably connected to the inside of the rotating bearing 3091. The wheel 3093 is installed on the front section of the wheel axle 3092. The turntable 308 is rotated to drive the threaded rod 307 to rotate inside the bearing seat 306, thereby pushing the operating platform 2 threadedly connected thereto to slide to the right side in accordance with the inner wall of the U-shaped slide 1 driven by the outer wheel 3093, thereby pushing the moving contact 302 to cooperate with the static contact 305.
[0031] A control panel 4 is installed on the left outer surface of the operating table 2 . The centering device is electrically connected to the control panel 4 , and the operation of the device is controlled by the control panel 4 .
[0032] During use, rotate the turntable 308, thereby driving the threaded rod 307 to rotate inside the bearing block 306, and then pushing the operating table 2 threadedly connected thereto to slide rightward along the inner wall of the U-shaped slide 1 driven by the outer wheels 3093, thereby pushing the moving contact 302 into the inside of the connecting sleeve 304. The right side thereof contacts the static contact head 303. The static contact head 303 expands the elastic clamp 3023 and the annular spring ring 3022 and snaps into the inside of the circular ring sleeve 3021. Subsequently, the annular spring ring 3022 and the elastic clamp 3023 clamp the static contact 305 under the action of their own elasticity, increasing the clamping force between the two.
[0033] It should be noted that in this article, relational terms such as first and second are only used 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.
Claims
1. A matching structure of a moving and static contact, comprising a U-shaped slide (1) and an operating table (2), wherein the operating table (2) is mounted on the top of the U-shaped slide (1), characterized in that: A centering device is provided on the operating table (2); The centering device comprises a matching structure and a centering structure; The matching structure comprises a vacuum interrupter (301), a moving contact (302), a stationary contact part (303), a connecting sleeve (304), and a stationary contact (305); the vacuum interrupter (301) is installed on the right side of an operating table (2); the moving contact (302) is installed on the right end of the vacuum interrupter (301); the stationary contact part (303) is installed on the right side of the operating table (2); the connecting sleeve (304) is installed on the left side of the stationary contact part (303); and the stationary contact (305) is installed inside the connecting sleeve (304) and corresponds horizontally to the moving contact (302).
2. The matching structure of a moving and static contact according to claim 1, characterized in that: The moving contact (302) comprises a circular ring sleeve (3021), an annular spring ring (3022), and an elastic clamp (3023); the circular ring sleeve (3021) is installed on the right side of the vacuum interrupter (301); two groups of the annular spring rings (3022) are respectively installed on the left and right sides of the circular ring sleeve (3021); and the two elastic clamps (3023) are respectively installed on the left and right ends of the circular ring sleeve (3021).
3. The matching structure of a moving and static contact according to claim 1, characterized in that: The centering structure comprises a bearing seat (306), a threaded rod (307), a turntable (308), and a moving assembly (309); the bearing seat (306) is installed on the top left side of the U-shaped slide (1); the threaded rod (307) is rotatably connected to the inside of the bearing seat (306); the turntable (308) is fixedly connected to the left side of the threaded rod (307); and four groups of moving assemblies (309) are respectively installed on the left and right ends of the front and rear sides of the operating table (2).
4. The matching structure of the moving and stationary contacts according to claim 3 is characterized in that: A threaded hole is formed through the left outer surface of the operating table (2), and the threaded rod (307) is threadedly connected to the inside of the threaded hole.
5. The matching structure of the moving and static contacts according to claim 4 is characterized in that: The moving assembly (309) comprises a rotating bearing (3091), a wheel axle (3092), and a wheel (3093); the rotating bearing (3091) is installed on the left side of the bottom front of the operating table (2); the wheel axle (3092) is rotatably connected to the inside of the rotating bearing (3091); and the wheel (3093) is installed on the front section of the wheel axle (3092).
6. The matching structure of a moving and static contact according to claim 1, characterized in that: A control panel (4) is installed on the left outer surface of the operating table (2), and the centering device is electrically connected to the control panel (4).