A linkage type high-voltage load isolation switch structure

Abstract

The application discloses a linkage type high-voltage load disconnector structure and relates to the technical field of high-voltage disconnectors. The linkage type high-voltage load disconnector structure comprises a base and two groups of insulators, the two groups of insulators are respectively provided with a contact and a static contact, and the linkage type high-voltage load disconnector structure further comprises: a main contact assembly arranged in the contact and comprising a moving contact and the contact, the lower side of the contact is provided with a T-shaped piece; an auxiliary contact arranged in the contact, when the disconnector is opened, the main contact assembly is disconnected, and the auxiliary contact is in communication with the static contact; a breaking assembly arranged on the outer side of the contact and comprising a shell and a lifting piece, when the disconnector is opened, the shell drives the lifting piece to move and drives the contact to be lifted upwards; and an arc extinguishing assembly arranged in the moving contact and comprising a sliding piece. When the disconnector is opened, the main contact assembly is disconnected first, the electric arc only burns the auxiliary contact, and the main circuit contact surface is protected; the elastic driving is relied on to quickly break and cooperate with airflow blowing to extinguish the arc, and the electric arc is prevented from reigniting.

Description

Technical Field

[0001] This invention relates to the field of high-voltage disconnect switch technology, and in particular to a linkage-type high-voltage load disconnect switch structure. Background Technology

[0002] High-voltage load disconnect switches are key basic equipment in power plants, substations, and high-voltage transmission networks. They are mainly used to form reliable and visible electrical isolation points to achieve safe isolation of lines and equipment during power outages and maintenance. They are devices with both switching and isolation functions, equipped with a simple arc-extinguishing device, capable of switching rated current under load, and have a clearly visible break point after disconnection. They undertake the dual functions of infrequent circuit switching control and safe isolation during maintenance.

[0003] Chinese patent application CN103441023A discloses a high-voltage disconnector, which includes a frame, a stationary contact assembly mounted on the front frame, a moving contact assembly mounted on the rear frame, and a rotating shaft mounted on the left frame.

[0004] Chinese patent application CN103137374A discloses a high-voltage disconnector, including a frame beam, a switching mechanism, a main blade, an insulating support, a terminal block, a conductive tube, a moving contact, and a stationary contact. The drive mechanism is connected to a vertical transmission linkage, which is connected to a main blade transmission crank arm installed in the frame beam. The main blade transmission crank arm is connected to a primary transmission linkage.

[0005] The aforementioned high-voltage load disconnect switches have some problems in actual use. For example, when the existing high-voltage load disconnect switches are opened, the moving contact and the stationary contact break directly, and the moving contact breaks slowly, resulting in a long arc duration. The arc continuously burns the connection surface between the moving and stationary contacts, causing damage to the moving and stationary contacts and affecting the stable connection of the main circuit. In addition, the auxiliary contact is prone to rebound after breaking, which can lead to secondary arc reignition and insufficient safety during opening. During the closing and opening process, the contacts and stationary contacts slide apart, resulting in a gradual increase in contact resistance and severe heat generation. At the same time, there is a lack of vibration-proof limit design, making it susceptible to poor contact due to external vibration. Furthermore, there is no external protective structure, making the conductivity performance easily interfered with by the external environment.

[0006] Therefore, it is necessary to invent a linkage-type high-voltage load disconnector structure to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a linkage-type high-voltage load disconnect switch structure to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a linkage-type high-voltage load disconnector structure, comprising a base and two sets of insulators, wherein conductive elements and stationary contacts are respectively disposed on the two sets of insulators, and further comprising: The main contact assembly, which is located inside the conductive component, includes a moving contact and a contact, with a T-shaped component provided on the underside of the contact; The auxiliary contact is located inside the conductive component. When the disconnecting switch is tripped, the main contact assembly is disconnected, and the auxiliary contact is connected to the stationary contact. The disconnecting assembly is located outside the conductive component and includes a housing and an lifting component. When the disconnecting switch is tripped, the housing moves the lifting component and causes the contacts to lift upward. The arc extinguishing component, which is located inside the moving contact, includes a sliding member. When the disconnecting switch is opened, the sliding member drives the auxiliary contact to separate from the stationary contact.

[0009] Preferably, the movable contact is disposed inside the conductive component, and a movable component is provided at the end of the movable contact, the end of which is fixedly connected to the side wall of the contact.

[0010] Preferably, the segmentation component further includes: A snap-fit ​​groove is formed on the outer surface of the stationary contact; The connector is fixedly connected at one end to the inner surface of the lifting member and at the other end to the outer surface of the contact, and is used to drive the contact to lift. The support block is located on the lower side of the lifting member. When the disconnecting switch is closed, the support block enters the snap-fit ​​groove and limits the contact through the connector. When the disconnecting switch is open, the support block moves to the left and abuts against the outer surface of the stationary contact, causing the lifting member to lift upward.

[0011] Preferably, the arc-extinguishing component further includes: The limiting component is fixedly installed inside the moving contact and slidably connected to the auxiliary contact; the sliding component is slidably installed inside the moving contact and fixedly connected to the auxiliary contact, and is used to drive the auxiliary contact to instantly separate from the stationary contact to cut off the power.

[0012] Preferably, the arc extinguishing component further includes an elastic element disposed inside the moving contact, one end of which is connected to the sliding element and the other end is connected to the limiting element. During the process of the contact separating from the stationary contact, the elastic element continuously stores force and drives the sliding element to quickly separate the auxiliary contact from the stationary contact.

[0013] Preferably, the arc extinguishing assembly further includes an air storage cavity formed between the sliding member and the moving contact member, an air guiding cavity formed between the conductive member and the moving contact member, and an air guiding port provided on the moving contact member for connecting the air guiding cavity and the air storage cavity; an arc extinguishing cavity is formed inside the outer shell, and an air outlet is provided on the outer shell for connecting the arc extinguishing cavity with the outside.

[0014] Preferably, the static contact has a conductive groove inside, an elastic ring inside the conductive groove, and a limiting ring that cooperates with the elastic ring is provided at the outer end of the auxiliary contact.

[0015] Preferably, the auxiliary contact has a through hole inside, and the T-shaped part is located inside the through hole. When the auxiliary contact quickly separates from the stationary contact and rebounds, the side wall of the through hole abuts against the T-shaped part.

[0016] Preferably, a support plate is provided on the side of the moving contact near the conductive element, and a driving element for moving the support plate is provided on one side of the support plate.

[0017] The technical effects and advantages of this invention are as follows: 1. In this invention, when the circuit breaker is tripped, the main contact assembly is disconnected first, while the auxiliary contact remains connected temporarily. The electric arc only burns the area between the auxiliary contact and the stationary contact, thus avoiding direct damage to the connection surface between the contact and the stationary contact by the electric arc and ensuring long-term stable connection of the main circuit.

[0018] 2. In this invention, the arc extinguishing component uses the elastic element to store force and drive the auxiliary contact to separate quickly and instantly, which greatly shortens the arc duration; in conjunction with the airflow purging of the gas storage chamber and the air guide chamber, it actively extinguishes the tripping arc, reducing the risk of arc burning and flashover from the source.

[0019] 3. In this invention, the support block of the disconnecting component cooperates with the snap-fit ​​groove to limit the contact after the circuit is closed, resisting poor contact caused by external vibrations such as strong winds; at the same time, the outer shell covers the contact connection part to isolate rain, snow, impurities, and ice, and avoid the external environment from affecting the conductivity.

[0020] 4. In this invention, when the disconnecting switch is closed or opened, the outer casing is raised, causing the contacts to rise, so that the contacts are directly separated from the stationary contacts. Furthermore, the T-shaped component and the through hole limit the movement, preventing the electric arc from reigniting and further improving the safety of the opening. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the invention in a usage scenario; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the contact portion of the present invention; Figure 4 This is a schematic diagram of the internal structure of the contact part of the present invention; Figure 5 This is a schematic diagram of the internal structure of the stationary contact part of the present invention; Figure 6 This is a schematic diagram of the contact portion of the present invention; Figure 7 This is a schematic diagram of the structure when the contact of the present invention is connected to the stationary contact; Figure 8 This is a schematic diagram of the structure when the contact and the stationary contact of the present invention are separated; Figure 9 This is a schematic diagram of the structure when the auxiliary contact and the stationary contact of the present invention are separated; Figure 10 This is a schematic diagram of the outer shell structure of the present invention.

[0022] In the diagram: 1. Base; 2. Insulator; 3. Conductive component; 4. Main contact assembly; 401. Moving contact; 402. Movable component; 403. Contact; 5. Stationary contact; 6. Auxiliary contact; 7. Breaking assembly; 701. Housing; 702. Support block; 703. Snap-fit ​​groove; 704. Connector; 705. Lifting component; 8. Arc extinguishing assembly; 801. Sliding component; 802. Limiting component; 803. Elastic component; 804. Arc extinguishing chamber; 805. Gas storage chamber; 806. Gas inlet; 807. Gas inlet chamber; 9. Support plate; 10. Conductive groove; 11. Elastic ring; 12. Limiting ring; 13. Driving component; 14. Through hole; 15. T-shaped component. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 Existing high-voltage load disconnect switches are susceptible to external vibrations during use, leading to poor contact between the main contact assembly 4 and the stationary contact 5, which can cause dangers such as electric arcs. The electric arcs generated by existing high-voltage load disconnect switches continuously burn the surfaces of the main contact assembly 4 and the stationary contact 5, and directly burn the connection area between the contact 403 and the stationary contact 5 during opening, causing it to become thinner and affecting the continuity of subsequent circuits. Existing high-voltage load disconnect switches are directly exposed to air, which can easily lead to impurities at the connection between the main contact assembly 4 and the stationary contact 5, resulting in dangers such as flashovers.

[0025] This invention provides, for example Figures 1 to 10The structure of a linkage-type high-voltage load disconnect switch shown includes a base 1 and two sets of insulators 2. Conductive elements 3 and stationary contacts 5 are respectively provided on the two sets of insulators 2. It also includes: a main contact assembly 4, which is disposed inside the conductive element 3, including a moving contact 401 and a contact 403. The contact 403 contacts the stationary contact 5 and connects to the circuit; and an auxiliary contact 6, which is disposed inside the conductive element 3. When the high-voltage load disconnect switch is tripped, the main contact assembly 4 is disconnected, and the auxiliary contact 6 is connected to the stationary contact 5. This is used to change the connection loop of the high-voltage load disconnect switch circuit. The circuit switching ensures that the main contact assembly 4 will never be burned by electric arc, so that the main contact assembly 4 is always stably connected to the stationary contact 5.

[0026] The disconnecting assembly 7, located outside the conductive member 3, includes a housing 701 and an lifting member 705. When the housing 701 moves to the right, the support block 702 generates a radial force using the inclined surface of the side wall of the stationary contact 5. This force acts on the lifting member 705, causing it to lift upward. When the high-voltage load disconnecting switch is tripped, the housing 701 drives the lifting member 705 to move to the left, and at the same time, the lifting member 705 lifts upward, causing the main contact assembly 4 to lift upward. The arc extinguishing assembly 8, located inside the moving contact 401, includes a sliding member 801. When the high-voltage load disconnecting switch is tripped, the sliding member 801 drives the auxiliary contact 6 to quickly separate from the stationary contact 5.

[0027] The moving contact 401 is disposed inside the conductive component 3. The end of the moving contact 401 is provided with a movable component 402. The movable component 402 has a conductive function and is elastic. It can be made of materials such as beryllium bronze or chromium zirconium copper. The contact 403 is disposed at the end of the movable component 402. When the high-voltage load disconnecting switch is opened, the lifting component 705 is lifted up and moves to the left, causing the contact 403 to be lifted up, so that the contact 403 is instantly separated from the stationary contact 5. When the circuit current suddenly increases, the movable component 402 drives the contact 403 to move to the right and increases the contact area between the contact 403 and the stationary contact 5, thereby reducing resistance and reducing heat generation.

[0028] The disconnecting assembly 7 also includes: a snap-fit ​​groove 703 formed on the outer surface of the stationary contact 5; and a support block 702 disposed on the lower side of the lifting member 705. The side wall of the snap-fit ​​groove 703 is provided with an inclined surface, and the side wall of the stationary contact 5 is provided with the same inclined surface, so that the support block 702 can contact the inclined surface and be lifted upward. When the high-voltage load disconnecting switch is closed, the support block 702 enters the snap-fit ​​groove 703 and limits the contact 403 through the connector 704 to prevent external vibration factors from causing poor contact between the contact 403 and the stationary contact 5. When the high-voltage load disconnecting switch is open, the support block 702 moves to the left and abuts against the inclined surface of the side wall of the snap-fit ​​groove 703, thereby driving the lifting member 705 to be lifted upward.

[0029] The arc extinguishing assembly 8 also includes: a limiting member 802, which is fixedly disposed inside the moving contact 401 and slidably connected to the auxiliary contact 6; and a sliding member 801, which is slidably disposed inside the moving contact 401 and fixedly connected to the auxiliary contact 6, for driving the auxiliary contact 6 to quickly separate from the stationary contact 5 to cut off the power.

[0030] The arc extinguishing assembly 8 also includes an elastic element 803 disposed inside the moving contact 401. One end of the elastic element 803 is connected to the sliding element 801, and the other end is connected to the limiting element 802. During the process of the contact 403 separating from the stationary contact 5, the elastic element 803 continuously stores force and drives the sliding element 801 to quickly separate the auxiliary contact 6 from the stationary contact 5. The elastic element 803 causes the circuit to be disconnected twice, preventing the generation of an electric arc and burning of its surface when the contact 403 is separated.

[0031] The arc extinguishing assembly 8 also includes a gas storage cavity 805 formed between the sliding member 801 and the moving contact 401, a gas guiding cavity 807 formed between the conductive member 3 and the moving contact 401, and a gas guiding port 806 provided on the moving contact 401 for connecting the gas guiding cavity 807 and the gas storage cavity 805; an arc extinguishing cavity 804 is formed inside the outer shell 701 and an air outlet is provided on the outer shell 701 for connecting the arc extinguishing cavity 804 with the outside; the sliding member 801 can move and squeeze the gas in the gas storage cavity 805, so that the gas in the gas storage cavity 805 enters the gas guiding cavity 807 through the gas guiding port 806, and finally enters the arc extinguishing cavity 804 for arc extinguishing or heat dissipation.

[0032] The stationary contact 5 has a conductive groove 10 inside, and an elastic ring 11 is installed inside the conductive groove 10. The outer end of the auxiliary contact 6 has a limiting ring 12 that cooperates with the elastic ring 11. When the high-voltage load disconnect switch is tripped, the auxiliary contact 6 first drives the limiting ring 12 to abut against the surface of the elastic ring 11, causing the elastic element 803 to continuously compress and store force. Finally, the limiting ring 12 compresses the elastic ring 11 and causes the auxiliary contact 6 to quickly separate from the stationary contact 5. Furthermore, the auxiliary contact 6 needs to withstand the burning of a high-temperature electric arc, and therefore must be made of high-melting-point, ablation-resistant materials, such as copper-tungsten alloys, tungsten, molybdenum, etc., or materials with correspondingly high conductivity, such as copper, silver, etc. These arc-resistant materials naturally have low conductivity, resulting in high resistance. Therefore, under normal closing conditions, contact 403 and auxiliary contact 6 maintain parallel contact with stationary contact 5. Since the contact resistance of contact 403 is much lower than that of auxiliary contact 6, most of the rated load current is conducted through contact 403, and auxiliary contact 6 basically does not bear the current load, thus effectively avoiding the hidden dangers caused by the overheating of auxiliary contact 6. During the opening process, contact 403 is disconnected from stationary contact 5, and at this time auxiliary contact 6 is connected to stationary contact 5, effectively reducing the current and subsequent arc, and preventing the arc from burning contact 403 and stationary contact 5.

[0033] A support plate 9 is provided on the side of the movable contact 401 near the conductive component 3. A driving component 13 for moving the support plate 9 is provided on one side of the support plate 9. The driving component 13 can be an electric telescopic rod structure, which drives the support plate 9 to move. The support plate 9 correspondingly drives the main contact assembly 4, auxiliary contact 6, disconnection assembly 7, arc extinguishing assembly 8, etc. to move.

[0034] When used, this application is based on Figure 5 When the high-voltage load disconnector is in the open state, the elastic element 803 inside the arc extinguishing component 8 naturally extends, stably supporting the auxiliary contact 6 in the initial position. The base 1, insulator 2, conductive element 3, and stationary contact 5 are all reset to the initial state, preparing for the closing operation.

[0035] When the high-voltage load disconnect switch performs the closing and energizing operation, the drive component 13 starts and drives the support plate 9 and the moving contact 401 to move to the right. The moving contact 401 simultaneously drives the limiting component 802 in the arc extinguishing component 8 to move. The limiting component 802 then drives the auxiliary contact 6 to move to the right synchronously through the elastic component 803 and the sliding component 801. As the auxiliary contact 6 continues to approach the stationary contact 5, the limiting ring 12 at its end will abut against the surface of the elastic ring 11 in the conductive groove 10 of the stationary contact 5. At this time, the movement of the auxiliary contact 6 is locked by the mechanical cooperation of the elastic ring 11 and the limiting ring 12. The auxiliary contact 6 and the sliding component 801 then remain stationary. The moving contact 401 continues to move to the right under the continuous drive of the support plate 9 and drives the limiting component 802 to gradually stretch the elastic component 803, so that the elastic component 803 smoothly accumulates elastic force.

[0036] At the same time, the rightward movement of the support plate 9 will continuously compress the air storage chamber 805 inside the moving contact 401. After being compressed, the air in the air storage chamber 805 flows into the air guide chamber 807 through the air guide port 806, and finally merges into the arc extinguishing chamber 804 inside the outer shell 701, forming a directional blowing airflow to clean the surface of the stationary contact 5, effectively removing dust, metal debris and other foreign objects from the surface of the contact 403, and avoiding problems such as poor contact, local heating and abnormal increase in resistance between the contact 403 and the stationary contact 5 due to the intervention of foreign objects after the circuit is closed.

[0037] Simultaneously, the moving contact 401 drives the contact 403 to move to the right via the movable part 402. The contact 403 then drives the outer shell 701, the lifting part 705, and the support block 702 to move synchronously via the connecting part 704. During the movement, the support block 702 first abuts against the inclined side wall of the stationary contact 5, and then slides on the inclined surface based on its own arc structure. Finally, the support block 702 swings downward and is inserted into the snap-fit ​​groove 703 on the outside of the stationary contact 5. The contact 403 and the side of the stationary contact 5 are tightly fitted to complete the circuit conduction. At this time, since the resistance of the auxiliary contact 6 is greater than the resistance of the movable part 402 and the contact 403, the circuit current will not flow through the auxiliary contact 6.

[0038] Therefore, the circuit connection at this stage is: conductive component 3, support plate 9, moving contact 401, movable component 402, contact 403, and stationary contact 5 (e.g., Figure 7 As shown, the snap-fit ​​groove 703 forms a mechanical limit on the support block 702, which can resist external interference such as strong winds and equipment vibration, and prevent the contact 403 from becoming loose or having poor contact when the circuit is closed; the outer shell 701 fully encloses the connection between the contact 403 and the stationary contact 5, forming a sealed physical protective barrier, isolating the influence of harsh external environmental factors on the conductivity, and improving the stability of the equipment during long-term outdoor operation.

[0039] When the high-voltage load disconnect switch is de-energized, the rated current flows inside it. The driving component 13 drives the support plate 9 to move to the left. The support plate 9 then pulls the moving contact 401, the movable component 402 and the contact 403 to move to the left in sync. As the moving contact 401 moves to the left, it drives the limiting component 802, the elastic component 803, the sliding component 801 and the auxiliary contact 6 to move to the left as a whole. The limiting ring 12 at the end of the auxiliary contact 6 abuts against the elastic ring 11 again and restricts the movement of the auxiliary contact 6.

[0040] Subsequently, the limiting member 802 continuously compresses the elastic member 803, causing the elastic member 803 to rapidly accumulate elastic force. The contact 403 disengages from the stationary contact 5, and the circuit connection automatically switches to: conductive member 3, support plate 9, moving contact 401, sliding member 801, auxiliary contact 6, and stationary contact 5 (e.g., Figure 8 As shown in the figure, the auxiliary contact 6 supports the circuit breaking transition, avoiding the direct disconnection of contact 403 and stationary contact 5 to generate a high-intensity arc, thus achieving a smooth circuit transition. The connected circuit has a large resistance and a small current, further achieving the effect of gradually cutting off power and extinguishing the arc.

[0041] As the moving contact 401 continues to move, the compression and storage of the elastic element 803 reaches a critical value. The limiting ring 12 overcomes the resistance of the elastic ring 11, and the sliding element 801, under the instantaneous elastic force of the elastic element 803, drives the auxiliary contact 6 to move to the left, achieving the instantaneous breakage of the auxiliary contact 6. At the same time as the auxiliary contact 6 rapidly separates, the sliding element 801 rapidly compresses the gas storage chamber 805. At this time, the outer shell 701 has not separated from the stationary contact 5. Therefore, the high-pressure airflow in the gas storage chamber 805 rushes into the arc-extinguishing chamber 804 through the air guide port 806 and the air guide chamber 807, and finally... The air is discharged downwards through the outlet, forming a powerful airflow that directly blows away the electric arc generated at the moment the auxiliary contact 6 separates from the stationary contact 5. This rapidly cools and completely extinguishes the arc, significantly shortening its duration and reducing the risk of arc burns. Simultaneously, the switching of the circuit ensures that the arc generated during the tripping operation only acts on the connection area between the auxiliary contact 6 and the stationary contact 5, thus preventing the burning of the contact 403 of the main contact assembly 4 and the contact surface of the stationary contact 5. This protects the structural integrity of the contact 403 from the source, ensuring the long-term conduction stability and service life of the high-voltage load disconnector.

[0042] Example 2 Based on the above embodiments, although the problems of vibration due to external influences during use of the high-voltage load disconnecting switch and impurities inside the stationary contact 5 causing direct arc burning at the connection between the contact 403 and the stationary contact 5 have been solved, some unresolved problems still exist. First, after the elastic element 803 drives the auxiliary contact 6 to quickly separate, the elastic element 803 will drive the auxiliary contact 6 to rebound in the opposite direction, which will lead to secondary arc reignition. Second, when the contact 403 slides away from the stationary contact 5, the connection area between the contact 403 and the stationary contact 5 continuously decreases and the resistance continuously increases, which causes the heat at this point to rise rapidly and burn the contact 403 and the stationary contact 5.

[0043] To solve the above problems, the disconnecting component 7 in the linkage-type high-voltage load disconnecting switch structure further includes a connecting member 704, which is disposed inside the housing 701. One end is fixedly connected to the inner surface of the lifting member 705, and the other end is fixedly connected to the outer surface of the contact 403. It is used to drive the contact 403 to lift. When the high-voltage load disconnecting switch is tripped, the support block 702 slides to the inclined side wall of the stationary contact 5 and drives the lifting member 705 to lift upward. The lifting member 705 drives the contact 403 to lift upward through the connecting member 704, thereby directly disconnecting the contact 403 from the stationary contact 5 and realizing circuit switching.

[0044] The auxiliary contact 6 has a through hole 14 inside, and a T-shaped member 15 is provided on the lower side of the contact 403. The T-shaped member 15 is elastic and can only deform in the vertical direction. Therefore, the T-shaped member 15 can be similar to an elastic sleeve structure. The T-shaped member 15 is located inside the through hole 14. Initially, the side wall of the through hole 14 and the T-shaped member 15 abut against each other. When the auxiliary contact 6 and the stationary contact 5 are quickly separated and rebound, the side wall of the through hole 14 abuts against the T-shaped member 15, and the elasticity of the T-shaped member 15 is used to achieve the elastic reset of the contact 403.

[0045] In summary, during the closing process of the high-voltage load disconnect switch, the drive component 13 drives the support plate 9 to move to the right, which in turn drives the moving contact 401, the movable component 402, and the contact 403 to move to the right. The contact 403 drives the outer shell 701, the lifting component 705, and the support block 702 to move synchronously through the connecting component 704. When the support block 702 moves to the inclined side wall of the stationary contact 5, it slides against the inclined side wall of the stationary contact 5 based on its own arc structure. During this process, the support block 702 slides upward, forcing the lifting component 705 to lift upward. The lifting action of the lifting component 705 drives the contact 403 to lift upward around the movable component 402 as the axis through the connecting component 704. The contact 403 and the side of the stationary contact 5 form a uniform gap, which completely avoids sliding friction during closing. It can also prevent the contact 403 from sliding against the stationary contact 5 and the contact area from being too small, resulting in excessive resistance and local heating and burning.

[0046] As the contact 403 is lifted upwards, the T-shaped part 15 is continuously stretched. The upper surface of the T-shaped part 15 abuts against the lower surface of the auxiliary contact 6 and causes it to undergo elastic deformation. After the support block 702 is inserted into the locking groove 703 on the outside of the stationary contact 5, the T-shaped part 15 pulls the contact 403 down to the side of the stationary contact 5 under its own elastic force, ensuring a stable electrical connection between the contact 403 and the stationary contact 5. At this time, the lifting part 705 returns to its initial straight state, and the locking groove 703 limits the support block 702 to prevent interference from external vibrations and other factors, ensuring the contact stability in the closed state.

[0047] When the high-voltage load disconnector is closed, the elastic element 803 drives the sliding element 801 and the auxiliary contact 6 to enter the conductive groove 10 instantly. Under the elastic action of the elastic element 803, the auxiliary contact 6 will continuously move back and forth left and right. At this time, the movement of the auxiliary contact 6 will cause the side wall of the through hole 14 to abut against the T-shaped element 15. The abutment action between the side wall of the through hole 14 and the T-shaped element 15 acts as a rigid emergency stop mechanism, forcibly cutting off the mechanical oscillation between the auxiliary contact 6 and the inner wall of the conductive groove 10 and maintaining relative stability.

[0048] Furthermore, the contact between the sidewall of the through hole 14 and the T-shaped piece 15 can limit the position of the auxiliary contact 6. Subsequently, the moving contact 401 drives the contact 403 and the auxiliary contact 6 to move to the appropriate position, so that the limiting ring 12 at the end of the auxiliary contact 6 is in the appropriate position and at the optimal distance from the elastic ring 11, ensuring the efficiency and stability of circuit switching during the subsequent opening process.

[0049] When the circuit current in the power grid increases, the drive component 13 drives the moving contact 401 to move towards the stationary contact 5 through the support plate 9, thereby increasing the contact area between the contact 403 and the stationary contact 5, reducing contact resistance and heat generation. At the same time, the support plate 9 moves and compresses the air guide cavity 807, causing the airflow inside to flow into the arc extinguishing cavity 804 inside the outer casing 701. The airflow is continuously discharged through the outlet of the arc extinguishing cavity 804, forming an active airflow heat dissipation channel, which quickly removes the heat accumulated in the contact area. This adapts to harsh working conditions such as high current and high temperature, avoids overheating damage to the equipment, and extends the service life of the high-voltage load disconnect switch.

[0050] When the high-voltage load disconnector is tripped, the drive unit 13 moves the support plate 9 to the left, the moving contact 401 moves to the left and pulls the contact 403 to move through the movable part 402. The moving contact 401 moves the auxiliary contact 6 to the left and connects the end limiting ring 12 and the elastic ring 11. The contact 403 moves the lifting part 705 and the support block 702 through the connecting part 704. The support block 702 slides against the inclined side wall of the snap-fit ​​groove 703 and continuously disengages from the snap-fit ​​groove 703. At this time, the support block 702 drives the lifting part 705 to lift upward. The lifting part 705 drives the contact 403 to lift around the movable part 402 through the connecting part 704. The contact 403 directly disengages from the stationary contact 5 instead of sliding apart, avoiding the defects of gradually decreasing contact area, increased resistance, and heat accumulation during tripping. At this time, the circuit automatically switches to the conducting state of the auxiliary contact 6 (e.g., Figure 8 As shown in the figure, the circuit transition is smooth during the opening process. At this time, since the auxiliary contact 6 is in contact with the stationary contact 5 and conducts electricity, the high-voltage load disconnecting switch guides the arc during opening through the auxiliary contact 6 to avoid the arc burning the end face of the stationary contact 5. The gas ejected from the gas storage chamber 805 can achieve the arc extinguishing effect on the arc.

[0051] After the auxiliary contact 6 is rapidly separated under the force-driven storage of the elastic element 803, the sliding element 801 rapidly compresses the gas storage chamber 805. The high-pressure airflow in the gas storage chamber 805 rushes into the arc extinguishing chamber 804 through the air guide port 806 and the air guide chamber 807, and is finally discharged downward along the air outlet, forming a powerful airflow that directly blows away the electric arc generated at the moment of separation between the auxiliary contact 6 and the stationary contact 5.

[0052] The auxiliary contact 6 is susceptible to the elastic force of the elastic element 803 and may rebound in the opposite direction, causing the arc to reignite. Therefore, when the auxiliary contact 6 rebounds to the critical position, the side of the through hole 14 and the T-shaped element 15 quickly abut and lock, thereby forcibly limiting the rebound stroke of the auxiliary contact 6, preventing the risk of arc reignition, and improving the electrical safety of the circuit breaker tripping.

[0053] After the circuit breaker is opened, the subsequent closing procedure can be carried out according to the above process.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A linkage-type high-voltage load disconnector structure, comprising a base (1) and two sets of insulators (2), wherein conductive elements (3) and stationary contacts (5) are respectively provided on the two sets of insulators (2), characterized in that, Also includes: The main contact assembly (4) is located inside the conductive component (3) and includes a moving contact (401) and a contact (403). A T-shaped component (15) is provided on the lower side of the contact (403). The auxiliary contact (6) is located inside the conductive component (3). When the disconnecting switch is opened, the main contact assembly (4) is disconnected, and the auxiliary contact (6) is connected to the stationary contact (5). The disconnecting assembly (7) is located outside the conductive component (3) and includes a housing (701) and an lifting component (705). When the disconnecting switch is tripped, the housing (701) moves the lifting component (705) and causes the contact (403) to lift upward. A snap-fit ​​groove (703) is formed on the outer surface of the stationary contact (5); The connector (704) is fixedly connected at one end to the inner surface of the lifting member (705) and at the other end to the outer surface of the contact (403), and is used to drive the contact (403) to lift. The support block (702) is located on the lower side of the lifting member (705). When the disconnecting switch is closed, the support block (702) enters the inside of the snap-fit ​​groove (703). When the disconnecting switch is open, the support block (702) moves to abut against the outer surface of the stationary contact member (5) and drives the lifting member (705) to lift upward. Arc extinguishing assembly (8), which is located inside the moving contact (401), includes a sliding member (801). When the disconnecting switch is opened, the sliding member (801) drives the auxiliary contact (6) to separate from the stationary contact (5). The limiting member (802) is fixedly installed inside the moving contact (401) and slidably connected to the auxiliary contact (6). The sliding member (801) is slidably installed inside the moving contact (401) and fixedly connected to the auxiliary contact (6), and is used to drive the auxiliary contact (6) to instantly separate from the stationary contact (5) and cut off the power. The arc extinguishing assembly (8) further includes a gas storage cavity (805) formed between the sliding member (801) and the moving contact member (401), a gas guiding cavity (807) formed between the conductive member (3) and the moving contact member (401), and a gas guiding port (806) provided on the moving contact member (401) for connecting the gas guiding cavity (807) and the gas storage cavity (805); an arc extinguishing cavity (804) is formed inside the outer shell (701), and an air outlet is provided on the outer shell (701) for connecting the arc extinguishing cavity (804) with the outside.

2. The linkage-type high-voltage load disconnector structure according to claim 1, characterized in that, The movable contact (401) is disposed inside the conductive component (3), and a movable component (402) is provided at the end of the movable contact (401). The end of the movable component (402) is fixedly connected to the side wall of the contact (403).

3. The linkage-type high-voltage load disconnector structure according to claim 1, characterized in that, The arc extinguishing assembly (8) also includes an elastic element (803) disposed inside the moving contact (401), one end of which is connected to the sliding element (801) and the other end is connected to the limiting element (802). During the process of separating the contact (403) from the stationary contact (5), the elastic element (803) stores force and drives the sliding element (801) to separate the auxiliary contact (6) from the stationary contact (5).

4. The linkage-type high-voltage load disconnector structure according to claim 1, characterized in that, The static contact (5) has a conductive groove (10) inside, and an elastic ring (11) is provided inside the conductive groove (10). The auxiliary contact (6) has a limiting ring (12) that cooperates with the elastic ring (11) at its outer end.

5. The linkage-type high-voltage load disconnector structure according to claim 1, characterized in that, The auxiliary contact (6) has a through hole (14) inside. The T-shaped part (15) is elastic and is located inside the through hole (14). When the auxiliary contact (6) separates from the stationary contact (5) and rebounds, the side wall of the through hole (14) abuts against the T-shaped part (15).

6. The linkage-type high-voltage load disconnector structure according to claim 1, characterized in that, The moving contact (401) is provided with a support plate (9) on the side near the conductive member (3), and a driving member (13) for moving the support plate (9) is provided on one side of the support plate (9).

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