Spring contact finger for high voltage switch

Abstract

This utility model relates to the field of high-voltage switch technology, specifically to a spring contact finger for a high-voltage switch, including a mounting box. A switch mechanism is disposed inside the mounting box, and a limiting mechanism is also disposed inside the mounting box. The limiting mechanism includes a connecting block and a limiting block. The connecting block is fixedly connected to one side of the inner wall of the mounting box, and the limiting block is installed inside the mounting box. By providing a limiting mechanism inside the mounting box, with the connecting block fixed to one side of the inner wall of the mounting box, the connecting block and the limiting block cooperate to restrict the movement of the switch mechanism, preventing excessive movement during opening and closing. This reduces mechanical wear on the spring contact finger caused by excessive compression, extending its service life; it also ensures the stability of the switch mechanism during movement, preventing deformation of the spring contact finger due to uneven force, thereby ensuring the normal operation of the high-voltage switch and the reliability of the electrical connection. Furthermore, it facilitates the replacement of the spring contact finger.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage switch technology, and in particular to a spring contact finger for a high-voltage switch. Background Technology

[0002] Spring contacts are typically placed within slots in the contacts. They maintain contact with the conductor through elastic force generated by their own compression and deformation, thus achieving electrical connection between the moving and stationary contacts and the conductor. However, because the contact area between the circular cross-section spring contact and the contact / conductor is curved, while the contact area between the contact / conductor and the spring contact is straight, only point contact can be formed. This point contact method leads to increased contact resistance, limited current carrying capacity, and a tendency for localized temperature rise under high current conditions, affecting the operational stability of high-voltage switchgear.

[0003] The prior art, "CN201237994Y", discloses an improved spring contact finger for high-voltage switches. This technology designs the cross-section of the spring contact finger to have a linear structure, and the linear structure is axially symmetrically distributed on the cross-section. Through this structural design, the contact form between the spring contact finger and the contact and conductor is changed from point contact to line contact, increasing the contact area, thereby reducing contact resistance, improving current carrying capacity, and effectively solving the temperature rise problem.

[0004] However, the spring contact is difficult to replace. During the opening and closing of the high-voltage switch, excessive compression will aggravate the mechanical wear of the contact and shorten its service life. At the same time, uneven force may cause the contact to deform, affecting the normal operation of the high-voltage switch and the reliability of electrical connection. Utility Model Content

[0005] The purpose of this utility model is to provide a spring contact finger for a high-voltage switch, which solves the problems of difficulty in replacing the spring contact finger, excessive compression during the opening and closing of the high-voltage switch, which will aggravate the mechanical wear of the contact finger and shorten its service life, and uneven force may cause the contact finger to deform, affecting the normal operation of the high-voltage switch and the reliability of electrical connection.

[0006] To achieve the above objectives, this utility model provides a spring contact finger for a high-voltage switch, including a mounting box. A switching mechanism is provided inside the mounting box, and a limiting mechanism is provided inside the mounting box. The limiting mechanism includes a connecting block and a limiting block. The connecting block is fixedly connected to one side of the inner wall of the mounting box, and the limiting block is installed inside the mounting box.

[0007] The mounting box has a stationary contact fixedly connected to the inner wall surface, a fixing plate fixedly connected to both sides of the mounting box, and a sleeve slidably connected to the surface of the mounting box.

[0008] The lower surface of the sleeve is fixedly connected to a mounting plate, which is fixedly connected to one side of the fixed plate by bolts. The upper surface of the sleeve is slidably connected to a sliding column, which penetrates the upper surface of the sleeve.

[0009] The mounting box has sliding grooves on both sides of its inner wall, a movable contact is fixedly connected to the lower surface of the mounting plate, and a spring contact finger is placed at the bottom of the inner wall of the mounting box.

[0010] The mounting box has elastic baffles fixedly connected to both sides of its inner wall, a mounting rod fixedly connected to the lower surface of the mounting plate, a telescopic rod fixedly connected to one side of the inner wall of the mounting rod, and a limiting block fixedly connected to one end of the telescopic rod.

[0011] The limiting block has a first spring fixedly connected to one side, and the other end of the first spring is fixedly connected to one side of the inner wall of the mounting rod. The first spring is movably wrapped around the surface of the telescopic rod.

[0012] The mounting plate has a fixed rod fixedly connected to its lower surface, and a connecting ring is fixedly connected to one end of the fixed rod. The connecting ring is slidably connected to the inner wall surface of the groove, and a stop block is slidably connected to the inner wall surface of the connecting ring.

[0013] A second spring is fixedly connected to one side of the stop block, and the other end of the second spring is fixedly connected to one side of the inner wall of the connecting ring. A paddle is fixedly connected to the surface of the stop block.

[0014] This utility model discloses a spring contact finger for a high-voltage switch. By setting a limiting mechanism inside the mounting box, a connecting block in the limiting mechanism is fixed to one side of the inner wall of the mounting box. The limiting block is installed inside the mounting box, and the connecting block and the limiting block cooperate with each other to restrict the movement of the switch mechanism, preventing excessive movement during opening and closing. On the one hand, this reduces mechanical wear caused by excessive compression of the spring contact finger, extending its service life; on the other hand, it ensures the stability of the switch mechanism during movement, preventing deformation of the spring contact finger due to uneven force, thereby ensuring the normal operation of the high-voltage switch and the reliability of electrical connections. At the same time, it facilitates the replacement of the spring contact finger. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the main appearance of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the mounting box according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the installation box according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the mounting plate and its connection according to an embodiment of the present utility model.

[0020] Figure 5 This is a schematic diagram of the internal structure of the mounting rod according to an embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the internal structure of the connecting ring in an embodiment of this utility model.

[0022] 1. Mounting box; 2. Switching mechanism; 201. Stationary contact; 202. Fixing plate; 203. Sleeve; 204. Mounting plate; 205. Sliding column; 206. Slide groove; 207. Moving contact; 208. Spring contact finger; 3. Limiting mechanism; 301. Elastic baffle; 302. Connecting block; 303. Mounting rod; 304. Telescopic rod; 305. Limiting block; 306. Spring No. 1; 307. Connecting ring; 308. Stop block; 309. Paddle; 310. Spring No. 2; 311. Fixing rod. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0024] Please see Figures 1-6 The high-voltage switch uses a spring contact finger and includes a mounting box 1. A switching mechanism 2 is installed inside the mounting box 1, and a limit mechanism 3 is also installed inside the mounting box 1. The limit mechanism 3 includes a connecting block 302 and a limit block 305. The connecting block 302 is fixedly connected to one side of the inner wall of the mounting box 1, and the limit block 305 is installed inside the mounting box 1. The mounting box 1 is the basic load-bearing structure of the entire device, providing installation space for the switching mechanism 2 and the limit mechanism 3. The switching mechanism 2 is responsible for realizing the on / off function of the high-voltage switch. The connecting block 302 in the limit mechanism 3 is fixed to the inner wall of the mounting box 1 and cooperates with the limit block 305 to limit the movement range of the switching mechanism 2, preventing excessive movement that could damage components and ensuring stable operation of the device.

[0025] Furthermore, a stationary contact 201 is fixedly connected to the inner wall surface of the mounting box 1, and fixed plates 202 are fixedly connected to both sides of the mounting box 1. A sleeve 203 is slidably connected to the surface of the mounting box 1. The stationary contact 201 cooperates with the moving contact 207 and is a key component for realizing the circuit switching. The fixed plate 202 is used to install and fix the mounting plate 204, so that the mounting plate 204 is stably connected to the mounting box 1. The sleeve 203 provides guidance and support for the movement of the mounting plate 204, ensuring the smoothness of the movement of the mounting plate 204.

[0026] Furthermore, a mounting plate 204 is fixedly connected to the lower surface of the sleeve 203. The mounting plate 204 is fixedly connected to one side of the fixed plate 202 by bolts. A sliding column 205 is slidably connected to the upper surface of the sleeve 203. The sliding column 205 penetrates the upper surface of the sleeve 203. The mounting plate 204 is the mounting carrier for components such as the moving contact 207 and the mounting rod 303. The sliding column 205 penetrates the upper surface of the sleeve 203. By pushing or pulling the sliding column 205, the sleeve 203 and the mounting plate 204 can be moved, thereby realizing the opening and closing operation of the switch. It is the input component of the operating force.

[0027] Furthermore, sliding grooves 206 are provided on both sides of the inner wall of the mounting box 1. A moving contact 207 is fixedly connected to the lower surface of the mounting plate 204, and a spring contact finger 208 is placed at the bottom of the inner wall of the mounting box 1. The sliding grooves 206 provide a path for the sliding of the connecting ring 307, ensuring that the connecting ring 307 can move along a fixed trajectory when the mounting plate 204 moves, thereby improving the stability of the device's movement. The moving contact 207 moves with the mounting plate 204 to realize the opening and closing of the circuit. The spring contact finger 208 is placed at the bottom of the inner wall of the mounting box 1, and its elastic deformation ensures that the contact maintains good contact with the conductor, reducing contact resistance and improving current carrying capacity.

[0028] Furthermore, elastic baffles 301 are fixedly connected to both sides of the inner wall of the mounting box 1, and mounting rods 303 are fixedly connected to the lower surface of the mounting plate 204. A telescopic rod 304 is fixedly connected to one side of the inner wall of the mounting rod 303, and a limiting block 305 is fixedly connected to one end of the telescopic rod 304. The elastic baffles 301 cooperate with the connecting block 302 to limit the movement of the mounting plate 204, further restricting the range of movement of the mounting plate 204 and preventing excessive movement. The mounting rod 303 provides the mounting position for the telescopic rod 304 and the limiting block 305. The telescopic rod 304 is telescopic, ensuring that the limiting block 305 can move smoothly when squeezed. The limiting block 305 cooperates with the connecting block 302 during the movement to achieve the limiting function.

[0029] Furthermore, a first spring 306 is fixedly connected to one side of the limiting block 305, and the other end of the first spring 306 is fixedly connected to one side of the inner wall of the mounting rod 303. The first spring 306 is movably wound around the surface of the telescopic rod 304. When the limiting block 305 is compressed, the first spring 306 is compressed and stores elastic potential energy. When the limiting block 305 moves to the middle of the connecting block 302, the first spring 306 releases its elastic potential energy to reset the limiting block 305, ensuring that the limiting block 305 can continue to cooperate with the connecting block 302 to perform the limiting function. At the same time, the telescopic rod 304 guides the first spring 306 to prevent it from shifting.

[0030] Furthermore, a fixing rod 311 is fixedly connected to the lower surface of the mounting plate 204. A connecting ring 307 is fixedly connected to one end of the fixing rod 311. The connecting ring 307 is slidably connected to the inner wall surface of the slide groove 206. A stop block 308 is slidably connected to the inner wall surface of the connecting ring 307. The fixing rod 311 connects the mounting plate 204 and the connecting ring 307, so that the movement energy of the mounting plate 204 is transmitted to the connecting ring 307. The connecting ring 307 slides in the slide groove 206, providing guidance for the movement of the mounting plate 204, ensuring the smoothness of the movement of the mounting plate 204, and limiting the spring contact finger 208 to a certain extent. The stop block 308 facilitates the replacement of the spring contact finger 208.

[0031] Furthermore, a second spring 310 is fixedly connected to one side of the stop block 308, and the other end of the second spring 310 is fixedly connected to one side of the inner wall of the connecting ring 307. A lever 309 is fixedly connected to the surface of the stop block 308. The second spring 310 provides elastic force to the stop block 308. When the stop block 308 is squeezed, the second spring 310 is compressed. When the spring contact finger 208 is removed from the connecting ring 307, the second spring 310 pushes the stop block 308 to reset, so that the stop block 308 can cooperate with the connecting ring 307 to play a limiting role. The lever 309 is fixed to the surface of the stop block 308, which facilitates manual operation of the stop block 308 and makes it convenient to release the limit when needed, which facilitates the maintenance and debugging of the device.

[0032] Complete working process: When a closing operation is required, push the sliding column 205 downward. The sliding column 205 slides on the bushing 203 and drives the mounting plate 204 downward. When the mounting plate 204 moves downward, it will drive the moving contact 207, the mounting rod 303 and the fixed rod 311 downward together. At the same time, the limiting block 305 on the mounting rod 303 will contact the connecting block 302 after passing the elastic baffle 301 during the movement. The connecting block 302 squeezes the limiting block 305, causing the limiting block 305 to compress the first spring 306 and drive the telescopic rod 304 to retract. When the limiting block 305 moves to the middle of the connecting block 302, it will reset under the elastic force of the first spring 306. At this time, the limiting block 305 and the connecting block 302 cooperate to play a limiting role and prevent the mounting plate 204 from moving downward too much. The fixed rod 311 drives the connecting ring 307 to slide downwards within the slide groove 206, thereby limiting the spring contact finger 208 to a certain extent. When the moving contact 207 contacts the spring contact finger 208 and cooperates with the stationary contact 201, the circuit breaker is closed. When it is necessary to open the circuit breaker, the sliding column 205 is pulled upwards, causing the bushing 203, mounting plate 204, and other components to move upwards. At this time, the limiting block 305 will act on the connecting block 302 again, the first spring 306 will contract, the limiting block 305 will pass the connecting block 302 and return to its original position, the elastic baffle 301 will limit the mounting rod 303, and the moving contact 207 will separate from the stationary contact 201, thus completing the circuit breaker opening. When it is necessary to replace the spring contact finger 208, unscrew the bolts on the fixing plate 202 and remove the sleeve 203 from the mounting box 1. Then push the lever 309 to move the stop block 308 and squeeze the second spring 310. After the stop block 308 has moved a certain distance, the spring contact finger 208 can be removed from the connecting ring 307. Then release the lever 309, and the second spring 310 will return to its original position. Under the action of elasticity, it will push the stop block 308 to return to its original position so that the new spring contact finger 208 can be installed in the device later.

[0033] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this application are still within the scope of this application. It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0034] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spring contact finger for a high-voltage switch, comprising a mounting box, characterized in that: The mounting box is equipped with a switch mechanism and a limit mechanism. The limit mechanism includes a connecting block and a limiting block. The connecting block is fixedly connected to one side of the inner wall of the mounting box, and the limiting block is installed inside the mounting box.

2. The spring contact finger for a high-voltage switch according to claim 1, characterized in that: A stationary contact is fixedly connected to the inner wall surface of the mounting box, a fixing plate is fixedly connected to both sides of the mounting box, and a sleeve is slidably connected to the surface of the mounting box.

3. A spring contact finger for a high-voltage switch according to claim 2, characterized in that: A mounting plate is fixedly connected to the lower surface of the sleeve, and the mounting plate is fixedly connected to one side of the fixed plate by bolts. A sliding column is slidably connected to the upper surface of the sleeve, and the sliding column penetrates the upper surface of the sleeve.

4. A spring contact finger for a high-voltage switch according to claim 3, characterized in that: The mounting box has sliding grooves on both sides of its inner wall, a movable contact is fixedly connected to the lower surface of the mounting plate, and a spring contact finger is placed at the bottom of the inner wall of the mounting box.

5. A spring contact finger for a high-voltage switch according to claim 3, characterized in that: Elastic baffles are fixedly connected to both sides of the inner wall of the mounting box, a mounting rod is fixedly connected to the lower surface of the mounting plate, a telescopic rod is fixedly connected to one side of the inner wall of the mounting rod, and a limiting block is fixedly connected to one end of the telescopic rod.

6. A spring contact finger for a high-voltage switch according to claim 5, characterized in that: A first spring is fixedly connected to one side of the limiting block, and the other end of the first spring is fixedly connected to one side of the inner wall of the mounting rod. The first spring is movably wrapped around the surface of the telescopic rod.

7. A spring contact finger for a high-voltage switch according to claim 3, characterized in that: A fixing rod is fixedly connected to the lower surface of the mounting plate, and a connecting ring is fixedly connected to one end of the fixing rod. The connecting ring is slidably connected to the inner wall surface of the groove, and a stop block is slidably connected to the inner wall surface of the connecting ring.

8. A spring contact finger for a high-voltage switch according to claim 7, characterized in that: A second spring is fixedly connected to one side of the stop block, and the other end of the second spring is fixedly connected to one side of the inner wall of the connecting ring. A lever is fixedly connected to the surface of the stop block.

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