High-safety high-voltage switch arc extinguish chamber contact structure

Abstract

The utility model relates to the technical field of high-voltage switches, in particular to a high-safety high-voltage switch arc extinguish chamber contact structure which comprises an arc extinguish chamber, a static contact and a moving contact, a shielding cover is installed in the arc extinguish chamber, an upper sealing cover is installed on the top of the arc extinguish chamber, a static conducting rod is installed on the upper sealing cover, and a movable conducting rod is installed on the static conducting rod. The bottom end of the static conducting rod extends into the shielding cover and is provided with a static contact, the bottom of the arc extinguish chamber is provided with a lower sealing cover, and the lower sealing cover is provided with a movable conducting rod. According to the high-safety contact structure of the arc extinguish chamber of the high-voltage switch, when the moving contact and the static contact are closed, the concave-convex surfaces of the moving contact and the static contact can be embedded with each other, the contact area is increased, the contact resistance is reduced, the heating phenomenon is reduced, meanwhile, the heat dissipation mechanism is arranged, heat generated by the contacts is conveniently dissipated, the temperature of the contacts is reduced, and the service life of the contacts is prolonged. And the reliability and the service life of the contact are further improved. Meanwhile, safety accidents caused by overheating are avoided.

Description

Technical Field

[0001] This application relates to the field of high-voltage switch technology, and more specifically, to a high-safety high-voltage switch arc-extinguishing chamber contact structure. Background Technology

[0002] Vacuum circuit breakers are named for their high vacuum conditions, which are the arc-extinguishing medium and the insulating medium between the contacts after arc extinguishing. They are widely used in power distribution networks due to their advantages such as small size, light weight, suitability for frequent operation, and maintenance-free arc extinguishing. In the vacuum interrupter chamber of existing vacuum circuit breakers, there is usually one moving contact and one stationary contact. Both short-circuit current interruption and rated current carrying are accomplished by this pair of contacts. The biggest drawback of this type of vacuum interrupter chamber is that it cannot simultaneously possess the capacity to interrupt large short-circuit currents and carry large rated currents. In other words, within this type of interrupter chamber, it is difficult to simultaneously achieve the long-term co-current carrying capacity of a large rated current while maintaining the large short-circuit current interruption capability.

[0003] In high-voltage switchgear, the performance of the arc-extinguishing chamber contact structure plays a crucial role in the switching capacity and safety of the switch. Traditional high-voltage switch arc-extinguishing chamber contact structures have some problems during long-term use. During opening and closing operations, the contact resistance is unstable, which easily leads to overheating and increases safety hazards. To address these issues, we propose a high-safety high-voltage switch arc-extinguishing chamber contact structure. Utility Model Content

[0004] In view of the above problems, this application proposes a high-safety high-voltage switch arc-extinguishing chamber contact structure to improve the above problems.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a high-voltage switch arc-extinguishing chamber contact structure with high safety, including an arc-extinguishing chamber, a stationary contact and a moving contact, wherein a shielding cover is installed inside the arc-extinguishing chamber, an upper cover is installed on the top of the arc-extinguishing chamber, a stationary conductive rod is installed on the upper cover, and the bottom end of the stationary conductive rod extends into the shielding cover and is installed with a stationary contact.

[0006] The bottom of the arc-extinguishing chamber is equipped with a lower cover, on which a movable conductive rod is provided. The top end of the movable conductive rod extends into the shielding cover and is equipped with a movable contact. The movable contact is slidably connected to the movable conductive rod. The bottom of the stationary contact is provided with a groove, and the top of the movable contact is provided with a receiving groove. The receiving groove is provided with a main contact that matches the groove, and the movable conductive rod extends into the receiving groove and is fixedly connected to the main contact. The arc-extinguishing chamber is provided with a heat dissipation mechanism connected to the stationary contact.

[0007] Preferably, the heat dissipation mechanism includes an insulating heat-conducting rod, a heat-conducting plate, a heat dissipation ring, and heat dissipation fins. Multiple insulating heat-conducting rods are fixedly installed on the top of the stationary contact, and the top ends of the insulating heat-conducting rods penetrate the shield. Multiple heat-conducting plates are fixedly installed on the inner wall of the arc-extinguishing chamber, and the heat-conducting plates are fixedly connected to the insulating heat-conducting rods. A heat dissipation ring is installed on the outer side of the arc-extinguishing chamber, and the heat dissipation ring is fixedly connected to the heat-conducting plates. Multiple heat dissipation fins are installed at equal intervals on the outer side of the heat dissipation ring.

[0008] Preferably, the bottom of the storage slot can be provided with multiple sliding slots, a sliding seat is slidably installed in the sliding slot, and the top of the sliding seat is fixedly connected to the main contact.

[0009] Preferably, a spring is fixedly connected to the bottom inner wall of the sliding groove, and the top of the connecting spring is fixedly installed on the sliding seat.

[0010] Preferably, a pushing groove is provided on one inner wall of the sliding groove, a pushing seat is slidably installed in the pushing groove, and the pushing seat is fixedly connected to the corresponding sliding seat.

[0011] Preferably, two connecting rods are fixedly installed on the bottom inner wall of the storage slot, and a blocking mechanism is provided between the connecting rods and the moving contact.

[0012] Preferably, the blocking mechanism includes a threaded groove, an adjusting screw, and an insulating support. The threaded groove is formed on the connecting rod, and the adjusting screw is threadedly installed in the threaded groove. The top end of the adjusting screw is fixedly installed with an insulating support, and the insulating support is in contact with the moving contact.

[0013] Preferably, a corrugated tube is sleeved on the moving conductive rod, and the bottom end of the corrugated tube is fixedly installed on the lower cover.

[0014] This application provides a high-safety high-voltage switch arc-extinguishing chamber contact structure, which has the following advantages:

[0015] 1. The high-safety high-voltage switch arc-extinguishing chamber contact structure allows for adjustment of the distance between the insulating support base and the moving contact by rotating the adjusting screw and moving it simultaneously through the threaded groove.

[0016] 2. This high-safety high-voltage switch arc-extinguishing chamber contact structure features a moving conductive rod that drives the main contact upwards, allowing it to move out of the receiving slot. The main contact then drives the sliding seat and push seat upwards. When the push seat contacts the top inner wall of the push slot, the main contact drives the moving contact upwards, allowing it to contact the stationary contact. The main contact can also insert into the groove and contact the stationary contact. When the moving and stationary contacts are closed, their concave and convex surfaces interlock, increasing the contact area and reducing contact resistance and heat generation. This design also improves contact stability, ensuring reliable contact and separation during opening and closing operations.

[0017] 3. This high-safety high-voltage switch arc-extinguishing chamber contact structure incorporates an insulated heat-conducting rod. This rod transfers heat from the contacts to a heat-conducting plate, which then transfers the heat to a heat dissipation ring and fins. The fins accelerate heat dissipation, effectively reducing the contact temperature and further improving contact reliability and lifespan. Simultaneously, it prevents safety accidents caused by overheating. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of a high-safety high-voltage switch arc-extinguishing chamber contact structure proposed in this utility model;

[0020] Figure 2 This is a cross-sectional front view of the contact structure of a high-voltage switch arc-extinguishing chamber with high safety proposed in this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the stationary and moving contacts of a high-voltage switch arc-extinguishing chamber contact structure with high safety proposed in this utility model.

[0022] Figure 4 This is a schematic diagram of part A of the high-safety high-voltage switch arc-extinguishing chamber contact structure proposed in this utility model;

[0023] Figure 5 This is a schematic diagram of part B of the high-safety high-voltage switch arc-extinguishing chamber contact structure proposed in this utility model.

[0024] In the diagram: 1. Arc-extinguishing chamber; 2. Shielding cover; 301. Static conductive rod; 302. Upper cover; 303. Static contact; 304. Groove; 401. Moving conductive rod; 402. Lower cover; 403. Moving contact; 404. Storage groove; 405. Main contact; 501. Insulating heat-conducting rod; 502. Heat-conducting plate; 503. Heat dissipation ring; 504. Heat dissipation fins; 601. Sliding groove; 602. Sliding seat; 603. Connecting spring; 701. Push groove; 702. Push seat; 801. Connecting rod; 802. Threaded groove; 803. Adjusting screw; 804. Insulating support seat. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] Please see Figure 1-3 This utility model provides a technical solution: a high-safety high-voltage switch arc-extinguishing chamber contact structure, including an arc-extinguishing chamber 1, a stationary contact 303, and a moving contact 403. A shielding cover 2 is installed inside the arc-extinguishing chamber 1. An upper cover 302 is installed on the top of the arc-extinguishing chamber 1, and a stationary conductive rod 301 is installed on the upper cover 302. The bottom end of the stationary conductive rod 301 extends into the shielding cover 2 and is fitted with the stationary contact 303. A lower cover 402 is installed at the bottom of the arc-extinguishing chamber 1, and a moving conductive rod 401 is provided on the lower cover 402. The top end of the moving conductive rod 401 extends into the shielding cover 2 and is fitted with the moving contact 403. Furthermore, the moving contact 403 is slidably connected to the moving conductive rod 401, the bottom of the stationary contact 303 is provided with a groove 304, and the top of the moving contact 403 is provided with a receiving groove 404. The receiving groove 404 is provided with a main contact 405 that is adapted to the groove 304. When the moving contact 403 and the stationary contact 303 are closed, their concave and convex surfaces can fit together, increasing the contact area, thereby reducing the contact resistance and reducing the heat generation. The moving conductive rod 401 extends into the receiving groove 404 and is fixedly connected to the main contact 405. The arc-extinguishing chamber 1 is provided with a heat dissipation mechanism connected to the stationary contact 303.

[0027] Please see Figure 4The heat dissipation mechanism includes an insulating heat-conducting rod 501, a heat-conducting plate 502, a heat dissipation ring 503, and heat dissipation fins 504. Multiple insulating heat-conducting rods 501 are fixedly installed on the top of the stationary contact 303, with the top of each rod penetrating the shielding cover 2. Multiple heat-conducting plates 502 are fixedly installed on the inner wall of the arc-extinguishing chamber 1, and are fixedly connected to the insulating heat-conducting rods 501. A heat dissipation ring 503 is installed on the outer side of the arc-extinguishing chamber 1, and is fixedly connected to the heat-conducting plate 502. Multiple heat dissipation fins 504 are installed at equal intervals on the outer side of the heat dissipation ring 503. By providing the insulating heat-conducting rods 501, the heat on the contact can be transferred to the heat-conducting plate 502. The heat-conducting plate 502 can transfer heat to the heat dissipation ring 503 and the heat dissipation fins 504. The heat dissipation fins 504 accelerate heat dissipation, facilitating the dissipation of heat generated by the contact and reducing the contact temperature.

[0028] Please see Figure 5 The bottom of the storage slot 404 is provided with multiple sliding slots 601. A sliding seat 602 is slidably installed in the sliding slot 601, and the top of the sliding seat 602 is fixedly connected to the main contact 405. A spring 603 is fixedly connected to the inner wall of the bottom of the sliding slot 601, and the top of the connecting spring 603 is fixedly installed on the sliding seat 602. A pushing slot 701 is provided on one inner wall of the sliding slot 601, and a pushing seat 702 is slidably installed in the pushing slot 701. The pushing seat 702 and the corresponding sliding seat 602 are connected to each other. 2. Fixed connection: When the moving conductive rod 401 drives the main contact 405 to move upward, the main contact 405 can move out of the receiving groove 404. The main contact 405 can drive the sliding seat 602 and the pushing seat 702 to move upward. When the pushing seat 702 contacts the top inner wall of the pushing groove 701, the main contact 405 can drive the moving contact 403 to move upward, so that the moving contact 403 can contact the stationary contact 303. The main contact 405 can also be inserted into the groove 304 and contact the stationary contact 303.

[0029] Please see Figure 5Two connecting rods 801 are fixedly installed on the bottom inner wall of the storage slot 404. A blocking mechanism is provided between the connecting rods 801 and the moving contact 403. The blocking mechanism includes a threaded groove 802, an adjusting screw 803, and an insulating support 804. The threaded groove 802 is opened on the connecting rod 801. The adjusting screw 803 is threadedly installed in the threaded groove 802. The insulating support 804 is fixedly installed at the top of the adjusting screw 803 and is in contact with the moving contact 403. A corrugated tube is sleeved on the moving conductive rod 401, and the bottom end of the corrugated tube is fixedly installed on the lower cover 402. When the moving contact 403 is separated from the stationary contact 303, the insulating support 804 contacts the moving contact 403. The insulating support 804 can block the moving contact 403, so that the main contact 405 can move and be stored in the storage slot 404.

[0030] In summary, the high-safety high-voltage switch arc-extinguishing chamber contact structure provided in this application allows for simultaneous rotation and movement of the adjusting screw 803 under the action of the threaded groove 802. The adjusting screw 803 drives the insulating support base 804 to move, thereby adjusting the distance between the insulating support base 804 and the moving contact 403. When the moving conductive rod 401 drives the main contact 405 upward, the main contact 405 can be moved out of the receiving groove 404. The main contact 405 can drive the sliding seat 602 and the push seat 702 to move upward. When the push seat 702 contacts the top inner wall of the push groove 701, the main contact 405 can drive the moving contact 403 to move upward, so that the moving contact 403 can contact the stationary contact 303. The main contact 405 can also insert into the groove 304 and contact the stationary contact 303. When the moving contact 403 and the stationary contact 303 are closed, their concave and convex surfaces can interlock, increasing the contact area and thus reducing contact resistance and heat generation. Simultaneously, this design also improves the contact stability of the contacts, ensuring reliable contact and separation during opening and closing operations.

[0031] By incorporating an insulating heat-conducting rod 501, heat from the contacts is transferred to the heat-conducting plate 502. The heat-conducting plate 502 then transfers the heat to the heat dissipation ring 503 and the heat dissipation fins 504. The heat dissipation fins 504 accelerate heat dissipation, facilitating the dissipation of heat generated by the contacts, reducing their temperature, and further improving their reliability and lifespan. Simultaneously, it prevents safety accidents caused by overheating.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, 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 process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-safety high-voltage switch arc-extinguishing chamber contact structure, comprising an arc-extinguishing chamber (1), a stationary contact (303), and a moving contact (403), characterized in that: The arc-extinguishing chamber (1) is equipped with a shield (2), and the top of the arc-extinguishing chamber (1) is equipped with an upper cover (302). A static conductive rod (301) is installed on the upper cover (302), and the bottom end of the static conductive rod (301) extends into the shield (2) and is equipped with a static contact (303). The bottom of the arc-extinguishing chamber (1) is equipped with a lower cover (402), and a moving conductive rod (401) is provided on the lower cover (402). The top end of the moving conductive rod (401) extends into the shield (2) and is equipped with a moving contact (403). The moving contact (403) is slidably connected to the moving conductive rod (401). The bottom of the stationary contact (303) is provided with a groove (304), and the top of the moving contact (403) is provided with a receiving groove (404). The receiving groove (404) is provided with a main contact (405) that is adapted to the groove (304). The moving conductive rod (401) extends into the receiving groove (404) and is fixedly connected to the main contact (405). The arc-extinguishing chamber (1) is provided with a heat dissipation mechanism connected to the stationary contact (303).

2. The high-safety high-voltage switch arc-extinguishing chamber contact structure according to claim 1, characterized in that: The heat dissipation mechanism includes an insulating heat-conducting rod (501), a heat-conducting plate (502), a heat dissipation ring (503), and heat dissipation fins (504). Multiple insulating heat-conducting rods (501) are fixedly installed on the top of the stationary contact (303). The top of the insulating heat-conducting rod (501) passes through the shield (2). Multiple heat-conducting plates (502) are fixedly installed on the inner wall of the arc-extinguishing chamber (1). The heat-conducting plates (502) are fixedly connected to the insulating heat-conducting rods (501). A heat dissipation ring (503) is installed on the outer side of the arc-extinguishing chamber (1). The heat dissipation ring (503) is fixedly connected to the heat-conducting plate (502). Multiple heat dissipation fins (504) are installed at equal intervals on the outer side of the heat dissipation ring (503).

3. The high-safety high-voltage switch arc-extinguishing chamber contact structure according to claim 1, characterized in that: The bottom of the storage slot (404) can be provided with multiple sliding slots (601), and a sliding seat (602) is slidably installed in the sliding slot (601), and the top of the sliding seat (602) is fixedly connected to the main contact (405).

4. The high-safety high-voltage switch arc-extinguishing chamber contact structure according to claim 3, characterized in that: A spring (603) is fixedly connected to the bottom inner wall of the sliding groove (601), and the top of the connecting spring (603) is fixedly installed on the sliding seat (602).

5. The high-safety high-voltage switch arc-extinguishing chamber contact structure according to claim 3, characterized in that: A pushing groove (701) is provided on one inner wall of the sliding groove (601), and a pushing seat (702) is slidably installed in the pushing groove (701), and the pushing seat (702) is fixedly connected to the corresponding sliding seat (602).

6. The high-safety high-voltage switch arc-extinguishing chamber contact structure according to claim 1, characterized in that: Two connecting rods (801) are fixedly installed on the bottom inner wall of the storage slot (404), and a blocking mechanism is provided between the connecting rods (801) and the moving contact (403).

7. The high-safety high-voltage switch arc-extinguishing chamber contact structure according to claim 6, characterized in that: The blocking mechanism includes a threaded groove (802), an adjusting screw (803), and an insulating support (804). The threaded groove (802) is formed on the connecting rod (801). The adjusting screw (803) is threadedly installed in the threaded groove (802). The insulating support (804) is fixedly installed at the top of the adjusting screw (803), and the insulating support (804) is in contact with the moving contact (403).

8. The high-safety high-voltage switch arc-extinguishing chamber contact structure according to claim 1, characterized in that: A corrugated tube is fitted onto the moving conductive rod (401), and the bottom end of the corrugated tube is fixedly installed on the lower cover (402).

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