Outdoor high-voltage ac disconnector

Abstract

This invention relates to the field of power distribution equipment technology, specifically disclosing an outdoor high-voltage AC disconnect switch, including a base and a conductive mechanism. Two insulating pillars are mounted on the base. The conductive mechanism includes a stationary contact, a moving contact, a conductive blade, a control assembly, a clamping assembly, and an upper limit assembly. The stationary and moving contacts are respectively located at the top of the two insulating pillars. One end of the conductive blade is rotatably mounted on the stationary contact, and the other end has a forked end. The control assembly controls the rotation of the conductive blade. The clamping assembly includes two wedge-shaped blocks that abut against the side walls of the forked end. The upper limit assembly includes a vertical rod and a telescopic spring block. When the switch is opened, the wedge-shaped blocks rise relative to the forked end, increasing the opening of the forked end. After the top of the forked end disengages from the upper limit assembly, the conductive blade can rotate and separate. This structure achieves automatic adjustment of clamping force and reliable contact, reduces contact mechanical wear, is suitable for harsh outdoor environments and frequent operation conditions, extends equipment service life, and reduces maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of power distribution equipment technology, specifically to an outdoor high-voltage AC disconnect switch. Background Technology

[0002] Outdoor high-voltage AC disconnect switches, as core equipment in power transmission and distribution systems, are widely used in power plants, substations, transmission lines, and other scenarios. Their primary function is to isolate electrical equipment from lines under no-load or low-load conditions, providing a safe working environment for power equipment inspection and maintenance. They are a crucial barrier ensuring the stable operation of the power system and the safety of personnel and equipment. With the rapid development of the power industry towards high-voltage, high-capacity, and long-distance power transmission, and the continuous advancement of smart grid construction, the performance requirements for outdoor high-voltage AC disconnect switches are becoming increasingly stringent. They not only need reliable electrical isolation capabilities but also must be able to withstand complex outdoor environments and frequent operating conditions for long-term stable operation.

[0003] The basic structure of existing outdoor high-voltage AC disconnect switches typically includes core components such as a base, insulating support, stationary contacts, moving contacts, and conductive blades. Their working principle involves a drive mechanism rotating the conductive blades to connect or disconnect them from the stationary and moving contacts, thus completing circuit conduction and isolation. To ensure conductivity reliability under high-voltage and high-current conditions, existing equipment generally relies on the contact pressure and contact area between the conductive blades and contacts to reduce contact resistance and avoid problems such as localized overheating and arcing caused by poor contact. However, in practical applications, the structural design of traditional disconnect switches has many shortcomings and cannot meet the high-performance requirements of current power systems.

[0004] From the perspective of clamping structure design, most existing outdoor high-voltage AC disconnect switches adopt fixed or passive clamping methods, lacking the ability to dynamically adjust the clamping force. These structures typically provide fixed contact pressure through springs, bolt pre-tightening, etc., and cannot adaptively adjust according to actual operating conditions. During long-term operation, factors such as contact surface oxidation, mechanical wear, and temperature changes cause the contact gap to gradually increase, leading to insufficient contact pressure, a significant increase in contact resistance, and consequently, increased localized heating. In severe cases, this can cause contact burn-out and adhesion, affecting the normal opening and closing operation of the disconnect switch. Conversely, if the initial pre-tightening force is too large, it will lead to increased mechanical wear between the conductive blade and the contacts, shortening the service life of components. It will also easily generate significant mechanical impact during opening and closing, increasing the risk of equipment failure. Especially in harsh outdoor environments, dust, rain, snow, condensation, and other contaminants will further exacerbate corrosion and wear on the contact surface, making the problems of insufficient or excessive clamping force more prominent, seriously affecting the reliability and stability of electrical connections.

[0005] Chinese patent document CN118888373B discloses a high-voltage AC disconnect switch, relating to the technical field of disconnect switches. It includes a base and a conductive mechanism. Two insulating posts are mounted on the base, respectively positioned on the left and right sides of the base top. Each insulating post has a mounting groove at its mounting point, and a removable fixing mechanism is provided in the mounting groove. This mechanism includes a mounting component and a clamping component. The mounting component includes a mounting sleeve and a connecting post. The mounting sleeve is fixedly installed within the mounting groove, and the connecting post is fixedly installed at the bottom of the insulating post. The connecting posts are compatible with each other. This technical solution offers the advantages of simple and convenient disassembly, avoiding the need for external tools and improving practicality.

[0006] However, most existing outdoor high-voltage AC disconnect switches adopt fixed or passive clamping structures. During the contact or separation process between the conductive switch and the moving contact, the change in clamping force is difficult to control precisely, which can easily lead to insufficient or excessive contact pressure. This can result in increased contact resistance, localized heating, or accelerated mechanical wear. At the same time, during the closing and opening switching process, the movement of the conductive switch and the clamping action are often asynchronous, which can easily cause jamming, impact, or vibration, affecting the long-term stable operation of the equipment. These problems are more prominent, especially in outdoor high-voltage environments and frequent operating conditions. Therefore, there is an urgent need for a disconnect switch structure with a more reasonable structure and higher action coordination. Summary of the Invention

[0007] This invention provides an outdoor high-voltage AC disconnect switch, aiming to solve problems in related technologies such as difficulty in accurately controlling the clamping force of outdoor high-voltage AC disconnect switches, asynchronous movement of the conductive switch blade and clamping action, which easily lead to increased contact resistance, aggravated mechanical wear, jamming and impact.

[0008] An outdoor high-voltage AC disconnect switch includes a base and a conductive mechanism. Two insulating posts are mounted on the base. The conductive mechanism includes: The stationary contact and the moving contact are respectively located at the top of two insulating posts; A conductive switch, one end of which is rotatably mounted on a stationary contact, and the other end of which is provided with a fork-shaped end that can contact a moving contact; Control components are used to control the rotation of the conductive switch. The clamping assembly includes two wedge-shaped blocks that abut against the two side walls of the fork-shaped end. When the fork-shaped end moves to the bottom of the moving contact, the wedge-shaped blocks descend relative to the fork-shaped end, reducing the opening of the fork-shaped end and thus clamping the moving contact. When the fork-shaped end clamps the moving contact, the upper limit component abuts against the top of the fork-shaped end until the wedge block rises relative to the fork-shaped end, increasing the opening of the fork-shaped end, at which point the top of the fork-shaped end disengages from the upper limit component. Its effects are as follows: By cooperating with the wedge block and the fork-shaped end, the control component drives the wedge block to rise and fall relative to the fork-shaped end, thereby achieving automatic adjustment of the opening of the fork-shaped end. This enables reliable clamping and releasing of the moving contact. The clamping force automatically adapts to the movement of the wedge block, maintaining sufficient contact pressure even if there is slight oxidation or wear on the contact surface, reducing contact resistance and ensuring the stability of the electrical connection. The upper limit component and the clamping component work together to precisely control the locking and unlocking timing of the fork-shaped end, achieving timing matching between the rotational movement of the conductive switch and the clamping action. When closing, the conductive switch is rotated to the correct position before the clamping action is performed; when opening, the clamping is released before the conductive switch is allowed to rotate. This avoids relative sliding friction when there is positive pressure between the contacts, significantly reducing mechanical wear and extending the service life of the equipment. The entire mechanism has strong synergy, effectively avoiding the jamming, impact, and vibration phenomena common in traditional designs. It is suitable for harsh outdoor environments and frequent operation conditions, improving the long-term stable operation capability of the disconnecting switch.

[0009] Preferably, the inclined surface of the wedge block consists of an inclined section one, a vertical section, and an inclined section two. When the fork-shaped end abuts against the vertical section, the top of the fork-shaped end does not disengage from the upper limit assembly. When the fork-shaped end abuts against the inclined section two, the top of the fork-shaped end disengages from the upper limit assembly. This segmented inclined surface design enables a smooth transition between the clamping force and the opening of the fork-shaped end. During closing, the clamping force gradually increases through the inclined section one, while the vertical section maintains a stable clamping state. During opening, the opening gradually expands through the inclined section two, ensuring smooth operation and avoiding sudden impacts.

[0010] Preferably, both the stationary and moving contacts are provided with limiting parts to restrict the rotation range of the conductive switch. The limiting parts can accurately limit the rotation stroke of the conductive switch, avoid excessive rotation that could cause component collision or misalignment, ensure that the conductive switch accurately engages with the moving contact when closing, and form a stable electrical isolation break when opening, thereby improving the accuracy and reliability of operation.

[0011] Preferably, the clamping assembly further includes a sliding seat that is slidably connected to the conductive switch, the wedge block is fixedly mounted on the sliding seat, and the drive end of the control assembly is connected to the sliding seat. The sliding seat provides a stable mounting carrier and motion guide for the wedge block, enabling the control assembly to drive the two wedge blocks to move synchronously by driving the sliding seat, ensuring the consistency of the action between the wedge block and the fork end, and ensuring that the fork end is clamped or released evenly.

[0012] Preferably, the control component includes an electric telescopic rod, with its two ends hinged to the base and the sliding seat, respectively. The electric telescopic rod has a fast response speed, stable driving force, and high control precision. The hinged connection can adapt to angle changes during its movement, ensuring smooth power transmission. It can accurately control the lifting distance and speed of the sliding seat, providing reliable assurance for clamping force adjustment and action timing control.

[0013] Preferably, the upper limiting component includes a vertical rod that can pass through the middle of the fork-shaped end, with telescopic spring blocks installed at both ends of the vertical rod. The telescopic spring blocks have elastic reset properties, retracting to make way when the circuit is closed, avoiding obstruction of the movement of the fork-shaped end and acting as a guide. When clamped, they abut against the top of the fork-shaped end to achieve limiting. When the circuit is opened, they disengage after the opening of the fork-shaped end expands, without affecting the rotation of the conductive switch. The structure is simple and the function is reliable.

[0014] Preferably, the fork-shaped end has an outwardly expanding section relative to the wedge-shaped block, and the distance between the two inner walls of the outwardly expanding section is greater than the distance between the two inner walls of other parts of the fork-shaped end. The outwardly expanding section provides sufficient space for the lifting and lowering movement of the wedge-shaped block, facilitating smooth sliding of the wedge-shaped block relative to the fork-shaped end, avoiding movement interference, and also helping to guide the moving contact to accurately enter the clamping area of ​​the fork-shaped end.

[0015] Preferably, guide rods are slidably mounted on both outer surfaces of the extended section, with the bottom ends of the guide rods slidably connected to the sliding seat. The guide rods further enhance the connection guidance between the sliding seat and the conductive switch, ensuring that the sliding seat always moves up and down in the set direction, preventing wedge block offset or jamming, and improving the stability of the clamping assembly's operation.

[0016] Preferably, the bottom end of the sliding seat is provided with a mounting groove, and a sliding block is provided in the mounting groove. The sliding block can slide and rotate horizontally relative to the bottom surface of the mounting groove, and the bottom end of the guide rod is fixedly connected to the sliding block. The movable design of the sliding block can adapt to the angle change and positional offset of the guide rod during the rotation of the conductive switch, compensate for motion deviation, avoid stress concentration between the guide rod and the sliding seat, and ensure the flexibility and coordination of the mechanism's movement.

[0017] Preferably, an elastic conductive sheet is provided on the inner side of the outer end of the fork-shaped end. The elastic conductive sheet can increase the contact area with the moving contact, further reduce the contact resistance, and its elastic properties can absorb the closing impact, reduce mechanical wear, and compensate for the contact pressure attenuation caused by temperature changes and component wear, ensuring contact reliability during long-term use.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are as follows: 1. Achieves automatic adjustment of clamping force and reliable contact: This invention, through the ingenious cooperation of the wedge block and the fork-shaped end, converts the linear motion of the control component into an adaptive clamping force on the moving contact. During the closing process, as the sliding seat descends, the wedge block forces the fork-shaped end to retract, and its clamping force automatically increases as the wedge block penetrates deeper, ensuring that the moving contact is firmly clamped with minimal contact resistance. Even after long-term operation, if slight oxidation or wear occurs on the contact surface, this structure can maintain sufficient contact pressure through its self-locking characteristics, ensuring the long-term reliability of the electrical connection.

[0019] 2. Significantly Reduced Mechanical Wear Between Contacts: The core innovation of this invention lies in the perfect decoupling of the rotational motion of the conductive switch from its clamping / releasing action. During opening, the sliding block must first be raised via the control component, causing the wedge block to move along the inclined section two, forcing the fork-shaped end opening to widen and completely disengage from the moving contact before the conductive switch can begin to rotate. Similarly, during closing, the conductive switch first rotates to its designated position before the sliding block descends to perform the clamping action. This "first trip, then rotate" and "first position, then clamp" working logic completely avoids relative sliding friction under significant positive pressure between the contacts, thereby greatly reducing mechanical wear on the contact surface and extending the electrical and mechanical lifespan of the switch.

[0020] 3. Improved coordination and stability of movement: Through precise linkage mechanisms such as the sliding seat, guide rod, and sliding block, this invention ensures that all components of the clamping assembly move in a coordinated manner. The cooperation between the upper limit assembly and the specific contours of the wedge block (inclined section one, vertical section, and inclined section two) precisely controls the timing of closing and unlocking, making the entire switch operation smooth and stable. This effectively avoids the impact, jamming, and shaking phenomena commonly found in traditional designs, making it particularly suitable for occasions requiring frequent operation or operating in harsh outdoor environments. Attached Figure Description

[0021] Figure 1 This is a front view of the present invention.

[0022] Figure 2 for Figure 1 A partial sectional view at point AA.

[0023] Figure 3 This is a schematic diagram of the structure of the present invention when it is in the closed state.

[0024] Figure 4 This is a front view of the present invention in the open state.

[0025] Figure 5 This is a schematic diagram of the conductive switch in this invention.

[0026] Figure 6 This is a front view of the clamping component in this invention.

[0027] Figure 7 This is a schematic diagram of the clamping assembly in this invention.

[0028] Figure label: 1. Base; 11. Insulating column; 2. Conductive mechanism; 21. Stationary contact; 22. Moving contact; 23. Conductive switch; 231. Fork-shaped end; 2311. Outward expansion section; 24. Control component; 25. Clamping component; 251. Wedge block; 2511. Inclined section one; 2512. Vertical section; 2513. Inclined section two; 252. Sliding seat; 253. Guide rod; 254. Sliding block; 26. Upper limiting component; 261. Upright pole; 262. Telescopic spring block. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] like Figures 1-7 As shown, an outdoor high-voltage AC disconnect switch includes a base 1 and a conductive mechanism 2. Two insulating posts 11 are installed on the base 1. The conductive mechanism 2 includes a stationary contact 21, a moving contact 22, a conductive switch 23, a control component 24, a clamping component 25, and an upper limit component.

[0031] The stationary contact 21 and the moving contact 22 are respectively disposed at the top of the two insulating pillars 11, serving as key contact components for circuit conduction and isolation. Both the stationary contact 21 and the moving contact 22 are provided with limiting parts to restrict the rotation range of the conductive switch 23. These limiting parts can effectively prevent the conductive switch 23 from colliding or misaligning with other components due to excessive rotation during the rotation process, ensuring that the movement trajectory of the conductive switch 23 meets the design requirements and improving the accuracy and reliability of closing and opening operations.

[0032] One end of the conductive switch 23 is rotatably mounted on the stationary contact 21, and can rotate around the stationary contact 21 to achieve connection or separation with the moving contact 22; the other end of the conductive switch 23 is provided with a fork-shaped end 231 that can contact the moving contact 22. The fork-shaped end 231 adopts a symmetrical structure design, which can clamp the moving contact 22 from both sides to ensure the stability and reliability of the contact.

[0033] The fork-shaped end 231 has an extended section 2311 positioned relative to the wedge-shaped block 251. The distance between the two inner walls of the extended section 2311 is greater than the distance between the two inner walls of other parts of the fork-shaped end 231. An elastic conductive sheet (not shown in the figure) can be installed on the inner side of the outer end of the fork-shaped end 231. The elastic conductive sheet is made of a metal material with high conductivity and high elasticity. When the fork-shaped end 231 clamps the moving contact 22, the elastic conductive sheet can fit tightly with the moving contact 22. On the one hand, this increases the contact area between the conductive switch 23 and the moving contact 22, reduces the contact resistance, and improves the conductivity to meet the conductivity requirements under high voltage and high current conditions. On the other hand, the elasticity of the elastic conductive sheet can act as a buffer, absorbing the impact force generated during the closing process, reducing mechanical wear between the fork-shaped end 231 and the moving contact 22, and compensating for the attenuation of contact pressure caused by temperature changes, component wear, and other factors, ensuring contact reliability during long-term use.

[0034] The clamping assembly 25 includes two wedge-shaped blocks 251 that abut against the two side walls of the fork-shaped end 231, and a sliding seat 252 that is slidably connected to the conductive switch 23. The wedge-shaped blocks 251 are fixedly mounted on the sliding seat 252, and the drive end of the control assembly 24 is connected to the sliding seat 252. The sliding seat 252 can slide up and down relative to the conductive switch 23. When the control assembly 24 drives the sliding seat 252 to move up and down, the sliding seat 252 will drive the wedge-shaped blocks 251 to move up and down relative to the fork-shaped end 231. Thus, through the interaction between the wedge-shaped blocks 251 and the inner wall of the fork-shaped end 231, the opening size of the fork-shaped end 231 is controlled.

[0035] When the fork-shaped end 231 moves to the bottom of the moving contact 22, the wedge-shaped block 251 descends relative to the fork-shaped end 231. Due to the special structure of the wedge-shaped block 251, it gradually detaches from the two side walls of the fork-shaped end 231 during its descent, causing the opening of the fork-shaped end 231 to decrease under its own elasticity, thereby tightly clamping the moving contact 22 and realizing reliable circuit conduction. When it is necessary to open the circuit, the wedge-shaped block 251 rises relative to the fork-shaped end 231, squeezing the two side walls of the fork-shaped end 231 outward, increasing the opening of the fork-shaped end 231, releasing the moving contact 22, and creating conditions for the rotational separation of the conductive switch 23.

[0036] The inclined portion of the wedge block 251 consists of an inclined section 2511, a vertical section 2512, and an inclined section 2513, to achieve smooth changes in clamping force and smooth transitions in motion. When the fork end 231 abuts against the vertical section 2512, the top of the fork end 231 does not disengage from the upper limit assembly. At this time, the opening size of the fork end 231 remains stable and can disengage from the moving contact 22. When the fork end 231 abuts against the inclined section 2513, the top of the fork end 231 disengages from the upper limit assembly. At this time, the opening of the fork end 231 can be further enlarged to facilitate the smooth rotation and separation of the conductive switch 23.

[0037] Guide rods 253 are slidably mounted on both outer surfaces of the fork-shaped end 231's extended section 2311. The bottom ends of the guide rods 253 are slidably connected to the sliding seat 252. The guide rods 253 guide and limit the movement of the sliding seat 252 and the wedge block 251, ensuring that the sliding seat 252 drives the wedge block 251 to move linearly relative to the fork-shaped end 231. This prevents the wedge block 251 from shifting or jamming during movement, thus improving the stability and reliability of the clamping assembly 25's operation.

[0038] The bottom end of the sliding seat 252 is provided with a mounting groove, and a sliding block 254 is provided in the mounting groove. The sliding block 254 can slide and rotate horizontally relative to the bottom surface of the mounting groove. The bottom end of the guide rod 253 is fixedly connected to the sliding block 254. This structural design can adapt to the angle change and positional offset of the guide rod 253 during the rotation of the conductive switch 23. By sliding and rotating the sliding block 254, the positional change of the guide rod 253 during the movement is compensated, avoiding excessive stress between the guide rod 253 and the sliding seat 252. This ensures that the guide rod 253 can always smoothly guide the movement of the sliding seat 252 and the wedge block 251, further improving the action coordination and flexibility of the entire mechanism.

[0039] The control component 24 controls the rotation of the conductive switch 23 and simultaneously drives the clamping component 25 to perform clamping or releasing actions. It is the core component for achieving coordinated operation of the disconnecting switch. In this invention, the control component 24 includes an electric telescopic rod, the two ends of which are hinged to the base 1 and the sliding seat 252, respectively. The hinged connection can accommodate the angle changes of the electric telescopic rod during the driving process, ensuring smooth power transmission.

[0040] The electric telescopic boom features fast response, stable driving force, and high control precision. It can precisely control the telescopic amount, and thus precisely control the movement distance and speed of the sliding seat 252, providing reliable power for precise control of the clamping force and the synchronization of the movement and clamping action of the conductive switch 23. By precisely controlling the telescopic action of the electric telescopic boom, the closing and opening processes can be smoothly carried out, avoiding phenomena such as impact and vibration.

[0041] The upper limit assembly includes a pole 261 that can pass through the middle of the fork end 231. Telescopic spring blocks 262 are installed at both ends of the pole 261. A spring (not shown in the figure) is connected between the telescopic spring blocks 262 and the pole 261, which has good elastic restoring performance.

[0042] When the fork-shaped end 231 clamps the moving contact 22, the upper limit component abuts against the top of the fork-shaped end 231, and the telescopic spring block 262 limits the fork-shaped end 231 to prevent it from disengaging from the moving contact 22, while ensuring that the fork-shaped end 231 can remain in the correct clamping position. Until the wedge block 251 rises relative to the fork-shaped end 231, increasing the opening of the fork-shaped end 231, the top of the fork-shaped end 231 disengages from the telescopic spring block 262. At this time, the conductive switch 23 can rotate freely to complete the opening action.

[0043] During the closing process, when the fork-shaped end 231 abuts against the telescopic spring block 262, the fork-shaped end 231 will exert pressure on the telescopic spring block 262, causing the telescopic spring block 262 to retract and make way, thus avoiding obstruction to the movement of the fork-shaped end 231. At the same time, the elastic reaction force of the telescopic spring block 262 can also guide the movement of the fork-shaped end 231, guiding the fork-shaped end 231 to move accurately to the position of the moving contact 22, reducing the impact and vibration during the closing process.

[0044] Opening process: When the gate needs to be opened, the electric telescopic rod in the control component 24 extends. Since one end of the electric telescopic rod is hinged to the base 1 and the other end is hinged to the sliding seat 252, the extension of the electric telescopic rod will drive the sliding seat 252 to move upward. At this time, since the top of the fork end 231 abuts against the telescopic spring block 262 in the upper limit component, the fork end 231 is limited by the telescopic spring block 262 and cannot move upward. Therefore, the sliding seat 252 moves upward relative to the fork end 231, which in turn drives the wedge block 251 fixed on the sliding seat 252 to move upward relative to the fork end 231, so that the wedge block 251 and the fork end 231 move relative to each other.

[0045] During the upward movement of the wedge block 251 relative to the fork end 231, the inner wall of the fork end 231 will come into contact with the inclined section 2511, the vertical section 2512, and the inclined section 2513 of the wedge block 251 in sequence. When the fork-shaped end 231 contacts the inclined section 2511, as the wedge block 251 rises, the squeezing force of the wedge block 251 on the inner wall of the fork-shaped end 231 gradually increases, and the fork-shaped end 231 begins to gradually expand outward. When the fork-shaped end 231 contacts the vertical section 2512, the outward expansion speed of the fork-shaped end 231 tends to be slow. At this time, the top of the fork-shaped end 231 is still against the telescopic spring block 262 and has not disengaged from the upper limit assembly. The opening size of the fork-shaped end 231 remains relatively stable and is disengaged from the moving contact 22. When the fork-shaped end 231 contacts the inclined section 2513, the wedge block 251 continues to rise, and the fork-shaped end 231 continues to expand outward under the action of the inclined section 2513. The top of the fork-shaped end 231 no longer contacts the telescopic spring block 262 and is completely disengaged from the upper limit assembly. At this time, the fork-shaped end 231 is no longer restricted from rotating.

[0046] Because the fork-shaped end 231 undergoes a certain elastic deformation during clamping and has a tendency to reset, after disengaging from the upper limit assembly, the fork-shaped end 231 applies a certain pressure to the inclined section 2513 of the wedge block 251. Under this pressure, the wedge block 251 moves in the opposite direction relative to the fork-shaped end 231. Finally, the contact area between the fork-shaped end 231 and the wedge block 251 stops on the vertical section 2512, keeping the opening size of the fork-shaped end 231 within a suitable range to facilitate subsequent rotation. Afterward, under the combined action of the continuous drive of the electric telescopic rod and its own reset tendency, the conductive switch 23 rotates around the stationary contact 21 until the conductive switch 23 completely disengages from the moving contact 22 and rotates to the maximum angle limited by the limit part. At this point, the opening operation is completed, and the disconnecting switch forms a clear electrical isolation break.

[0047] Closing process: When a closing operation is required, the electric telescopic rod in the control component 24 retracts, which drives the sliding seat 252 to move downward. Since the contact part between the fork end 231 and the wedge block 251 is on the vertical section 2512 at this time, and the fork end 231 clamps the wedge block 251, the downward movement of the sliding seat 252 will drive the conductive switch 23 to rotate and descend around the stationary contact 21, and begin to move towards the moving contact 22.

[0048] As the conductive switch 23 rotates and descends, the fork-shaped end 231 gradually approaches the upper limit assembly. When the fork-shaped end 231 comes into contact with the telescopic spring block 262 in the upper limit assembly, the fork-shaped end 231 exerts a squeezing effect on the telescopic spring block 262, causing the telescopic spring block 262 to retract and make way, thus avoiding obstruction to the continued movement of the fork-shaped end 231. At the same time, the elastic reaction force of the telescopic spring block 262 guides the movement of the fork-shaped end 231, guiding it accurately towards the moving contact 22. As the electric telescopic rod continues to retract, the conductive switch 23 continues to rotate and descend, until finally the end of the fork-shaped end 231 falls to the position of the moving contact 22. At this point, the conductive switch 23 has descended to the maximum height limited by the limiting part and can no longer descend.

[0049] Since the conductive switch 23 has reached its maximum descent height, the sliding seat 252 continues to move downward under the drive of the electric telescopic rod, causing the wedge block 251 to descend relative to the fork end 231. As the wedge block 251 descends, it gradually reduces the squeezing force on the inner wall of the fork end 231, causing the contact area between the fork end 231 and the wedge block 251 to gradually move from the vertical section 2512 to the inclined section 2511. As the contact area moves, the opening of the fork end 231 gradually decreases, and finally the end of the fork end 231 tightly clamps the moving contact 22, realizing the circuit conduction. At this time, the wedge block 251 no longer contacts the fork end 231, the electric telescopic rod stops retracting, and the closing operation is completed.

[0050] This structural design and operating method effectively avoids mutual friction between the stationary contact 21 and the fork-shaped end 231 during opening and closing, reducing wear between them. At the same time, through the coordinated operation of the control component 24, the clamping component 25 and the upper limit component, the movement of the conductive switch 23 and the clamping action are synchronized, and the change process of the clamping force is precisely controlled, avoiding insufficient or excessive contact pressure, reducing contact resistance, reducing local heating and mechanical wear, effectively solving the problems of jamming, impact, and vibration existing in the prior art, and improving the action coordination, contact reliability and long-term stability of the disconnecting switch.

[0051] The outdoor high-voltage AC disconnect switch of the present invention, through reasonable structural design and coordinated component operation, has the following significant advantages compared with the prior art: Precise clamping force control and high contact reliability: This invention achieves smooth changes in clamping force through the special structural design of the wedge block 251 and the precise control of the sliding seat 252 movement by the control component 24. During the closing process, the wedge block 251 descends relative to the fork end 231, and the opening of the fork end 231 gradually decreases through the action of the inclined section 2511, applying a stable clamping force to the moving contact 22, avoiding increased contact resistance and localized heating problems caused by insufficient contact pressure; during the opening process, the clamping force gradually decreases, avoiding mechanical wear caused by excessive clamping force and extending the service life of the components.

[0052] The operation is highly coordinated and smooth: the coordinated action of the control component 24, clamping component 25, and upper limit component enables the synchronous rotation and clamping of the conductive switch 23. When opening, the electric telescopic rod extends, causing the sliding seat 252 and wedge block 251 to rise, while the fork end 231 expands outward and disengages from the moving contact 22. The conductive switch 23 then rotates into position. When closing, the electric telescopic rod retracts, causing the conductive switch 23 to rotate and descend. The fork end 231, guided by the guide, accurately engages with the moving contact 22, and the wedge block 251 descends to clamp. Throughout the operation, the movements of all components are coordinated, avoiding jamming, impact, and vibration, thus improving the stability and smoothness of the operation.

[0053] The structure is rationally designed, ensuring high stability and reliability: the limiting part restricts the rotation range of the conductive knife switch 23, preventing component collisions and misalignments caused by excessive rotation; the design of the guide rod 253 and the sliding block 254 provides good guidance and compensation for the movement of the sliding seat 252 and the wedge block 251, ensuring the stability of the mechanism's operation; the elasticity of the telescopic spring block 262 acts as a buffer and guide during closing and opening, reducing impact damage between components; the design of the fork-shaped end 231 with an extended section 2311 facilitates the movement of the wedge block 251 and the guidance of the moving contact 22, further improving the reliability of the mechanism. These structural designs work together to ensure that the disconnecting switch maintains stable performance during long-term use, making it suitable for harsh outdoor environments and frequent operation conditions.

[0054] Low wear and long service life: The structural design of this invention effectively avoids mutual friction between the stationary contact 21 and the fork-shaped end 231 during opening and closing, reducing mechanical wear between them; the buffering effect of the elastic conductive sheet further reduces the wear of the contact parts; at the same time, the reasonable control of the clamping force avoids fatigue damage to components caused by excessive pressure. These factors work together to extend the service life of each component of the disconnecting switch, reducing equipment maintenance costs and replacement frequency.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An outdoor high-voltage AC disconnect switch, comprising a base (1) and a conductive mechanism (2), wherein two insulating posts (11) are mounted on the base (1), characterized in that, The conductive mechanism (2) includes: The stationary contact (21) and the moving contact (22) are respectively located at the top of the two insulating pillars (11); The conductive switch (23) has one end rotatably mounted on the stationary contact (21) and the other end is provided with a fork-shaped end (231) that can contact the moving contact (22). Control component (24) for controlling the rotation of conductive switch (23); The clamping assembly (25) includes two wedge blocks (251) that abut against the two side walls of the fork end (231). When the fork end (231) moves to the bottom of the moving contact (22), the wedge blocks (251) descend relative to the fork end (231), reducing the opening of the fork end (231) and thus clamping the moving contact (22). When the fork-shaped end (231) clamps the moving contact (22), the upper limit component (26) abuts against the top of the fork-shaped end (231) until the wedge block (251) rises relative to the fork-shaped end (231), increasing the opening of the fork-shaped end (231), and then the top of the fork-shaped end (231) disengages from the upper limit component.

2. The outdoor high-voltage AC disconnect switch according to claim 1, characterized in that, The inclined portion of the wedge block (251) is composed of an inclined section one (2511), a vertical section (2512) and an inclined section two (2513). When the fork end (231) abuts against the vertical section (2512), the top of the fork end (231) does not disengage from the upper limit assembly. When the fork end (231) abuts against the inclined section two (2513), the top of the fork end (231) disengages from the upper limit assembly.

3. The outdoor high-voltage AC disconnect switch according to claim 2, characterized in that, Both the stationary contact (21) and the moving contact (22) are provided with limiting parts to restrict the rotation range of the conductive switch (23).

4. The outdoor high-voltage AC disconnect switch according to claim 3, characterized in that, The clamping assembly (25) also includes a sliding seat (252) that is slidably connected to the conductive switch (23) in the upper and lower parts. The wedge block is fixedly installed on the sliding seat (252), and the drive end of the control assembly (24) is connected to the sliding seat (252).

5. The outdoor high-voltage AC disconnect switch according to claim 4, characterized in that, The control component (24) includes an electric telescopic rod, the two ends of which are hinged to the base (1) and the sliding seat (252) respectively.

6. The outdoor high-voltage AC disconnect switch according to claim 4, characterized in that, The upper limiting component (26) includes a pole (261) that can pass through the middle of the fork end (231), and telescopic springs (262) are installed at both ends of the pole (261).

7. The outdoor high-voltage AC disconnect switch according to claim 6, characterized in that, The fork-shaped end (231) is provided with an outward expansion section (2311) at a position relative to the wedge-shaped block (251), and the distance between the two inner walls of the outward expansion section (2311) is greater than the distance between the two inner walls of other parts of the fork-shaped end (231).

8. The outdoor high-voltage AC disconnect switch according to claim 7, characterized in that, Guide rods (253) are slidably installed on both outer surfaces of the extended section (2311), and the bottom end of the guide rods (253) is slidably connected to the sliding seat (252).

9. The outdoor high-voltage AC disconnect switch according to claim 8, characterized in that, The bottom end of the sliding seat (252) is provided with an installation groove, and a sliding block (254) is provided in the installation groove. The sliding block (254) can slide and rotate horizontally relative to the bottom surface of the installation groove. The bottom end of the guide rod (253) is fixedly connected to the sliding block (254).

10. The outdoor high-voltage AC disconnect switch according to claim 9, characterized in that, An elastic conductive sheet is provided on the inner side of the outer end of the fork-shaped end (231).

Images