An armored withdrawable switchgear with dual-rail precision guidance

Abstract

This invention relates to the technical field of withdrawable switchgear and discloses an armored withdrawable switchgear with double-rail precision guidance, comprising an armored cabinet and a truck compartment, a cable compartment, and a circuit breaker truck disposed within the armored cabinet. The circuit breaker truck is equipped with stationary contacts. A partition is fixedly installed between the truck compartment and the cable compartment, and a moving contact that cooperates with the stationary contacts is fixedly installed on the partition. First guide rails are fixedly installed on both sides of the inner wall of the truck compartment, and guide and limit components for guiding and limiting the movement of the circuit breaker truck are fixedly installed on the first guide rails. The guide and limit components include a guide unit and a locking unit and a limiting unit that cooperate with the guide unit. The guide unit constrains the movement of the circuit breaker truck. This invention prevents forced insertion and damage to the contacts when the circuit breaker truck is tilted, ensuring the stability of the insertion of the moving and stationary contacts.

Description

Technical Field

[0001] This invention relates to the technical field of withdrawable switchgear, specifically to an armored withdrawable switchgear with dual-rail precision guidance. Background Technology

[0002] Armored withdrawable switchgear, as a key piece of equipment in power transmission and distribution systems, is widely used in power plants, substations, industrial and mining enterprises, and other power distribution scenarios. Its core function is to realize the connection, disconnection, and protection of circuits. The circuit breaker trolley, as the core moving component inside the switchgear that realizes the connection and disconnection of circuits, directly determines the overall operational stability and safety of the switchgear through its travel guidance accuracy, position locking reliability, and contact protection safety. Most existing switchgear uses a single rail or a simple double-sided rail structure, which is insufficient in restraining the movement of the handcart. During the pushing and moving process, problems such as lateral deviation, vertical jumping, and asynchrony are prone to occur. In addition, there is a lack of guiding limit control structure, which means that even if the handcart moves at an angle, it can still complete the docking of moving and stationary contacts. This can easily lead to problems such as low coaxiality of docking, incomplete insertion, or misaligned insertion. Long-term operation can easily lead to poor contact, local heating, and arc erosion. Furthermore, the contact protection baffles of traditional switchgear are mostly manually opened and closed or driven by independent springs, which are not synchronized with the movement of the handcart. This can easily lead to interference and collision when the protection baffle is not fully opened before pushing the handcart, or the protection baffle is not closed in time after the handcart is moved out, resulting in the stationary contacts being exposed for a long time, which poses safety risks such as accidental contact by personnel, dust intrusion, and short circuit due to moisture. Summary of the Invention

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an armored withdrawable switchgear with dual-track precision guidance, which has the advantages of synchronous guidance, forced linkage between guidance and locking, variable pitch adaptive drive, and static contact follow-up protection. It solves the problems of easy guide deviation, jamming, low docking accuracy of moving and static contacts, and asynchronous protection in existing switchgear.

[0004] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: an armored withdrawable switchgear with dual-rail precision guidance, comprising an armored cabinet and a truck compartment, a cable compartment, and a circuit breaker truck disposed within the armored cabinet. The circuit breaker truck is provided with stationary contacts. A partition is fixedly installed between the truck compartment and the cable compartment. A moving contact that cooperates with the stationary contacts is fixedly installed on the partition. First guide rails are fixedly installed on both sides of the inner wall of the truck compartment. Guide and limit components for guiding and limiting the movement of the circuit breaker truck are fixedly installed on the first guide rails. The guiding and limiting assembly includes a guiding unit and a locking unit and a limiting unit used in conjunction with the guiding unit. The guiding unit constrains the movement of the circuit breaker trolley, and the locking unit can only release the unlocking permission when the circuit breaker trolley is guided into place. Each of the first guide rails has a slider slidably mounted inside it. The partition plate is provided with a follow-up protective component that works in conjunction with the guide and limit assembly. Two drive plates are provided through the follow-up protective component, and the drive plates are rotatably connected to the slider on the same side. They move synchronously with the guide stroke of the slider.

[0005] As a preferred embodiment of the present invention, the guiding unit includes an anti-deviation plate, a screw, and a second guide rail. There are two second guide rails, which are fixedly installed on both sides of the handcart compartment. The first guide rail and the second guide rail are both arranged along the travel direction of the circuit breaker handcart. The anti-deviation plate is fixedly installed between two sliders, and the screw is threaded onto the anti-deviation plate.

[0006] As a preferred embodiment of the present invention, the screw is composed of a long pitch section and a short pitch section. The long pitch section is located on the inner side of the screw near the working position of the circuit breaker trolley, and the short pitch section is located on the outer side of the screw near the test position of the circuit breaker trolley, thereby realizing speed control of the circuit breaker trolley's rapid closing and rapid opening.

[0007] As a preferred embodiment of the present invention, guide grooves for sliding of slider and anti-deviation plate are provided on both sides of the first guide rail, and protrusions are provided on both sides of the slider, and the protrusions of the slider slide in the guide groove on the same side.

[0008] As a preferred embodiment of the present invention, the locking unit includes a compression spring fixedly installed on the second guide rail, a limiter fixedly installed at the top of the compression spring, a trigger block fixedly installed on the side of the slider near the second guide rail, one end of the limiter having a guide slope that cooperates with the trigger block, and the other end being fixedly connected to a limit baffle inserted in the second guide rail. When the trigger block presses against the inclined surface of the limit block, it pushes the limiter upward to release it.

[0009] As a preferred embodiment of the present invention, a telescopic rod is provided inside the compression spring, and the two ends of the telescopic rod are respectively fixedly connected to the second guide rail and the limiter.

[0010] As a preferred embodiment of the present invention, the limiting unit is disposed in the second guide rail. The limiting unit includes two cranks rotatably installed in the second guide rail. The two cranks are symmetrically arranged. A clamping plate is fixedly installed at one end of each crank, and a sliding groove is opened at the other end of each crank. The same limiting plate is slidably installed in the two sliding grooves.

[0011] As a preferred embodiment of the present invention, a reset spring is fixedly installed on the limiting plate, and the end of the reset spring away from the limiting plate is fixedly connected to the partition.

[0012] As a preferred embodiment of the present invention, the follow-up protective assembly further includes two rotating shafts rotatably mounted on the partition plate. Protective plates are fixedly mounted on both rotating shafts, and the two protective plates are symmetrically and alternately distributed. A connecting rod is rotatably mounted above one of the protective plates, and the other end of the connecting rod is rotatably connected to the lower part of the other protective plate, so that when one protective plate rotates, it smoothly drives the other protective plate to rotate through the connecting rod. A gear is fixedly mounted on the rotating shaft, and toothed plates that mesh with the gear are slidably mounted on both sides of the partition plate. The bottom end of the toothed plate is rotatably connected to the drive plate on the same side.

[0013] As a preferred embodiment of the present invention, the partition plate is provided with a groove for the toothed plate to slide.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides an armored withdrawable switchgear with dual-rail precision guidance, which has the following advantages: 1. This type of armored withdrawable switchgear with dual-rail precision guidance, through the setting of a guide unit and a limit unit, when the circuit breaker trolley deviates during movement, the limit baffle inserted in the second guide rail blocks the movement of the slider, thereby preventing the insertion of the moving contact and the stationary contact; when no deviation occurs, the movement of the slider will drive the trigger block to squeeze the guide ramp, push up the limiter and the limit baffle, release the obstruction of the slider's movement, and thus release the unlocking authority, allowing the moving contact and the stationary contact to be smoothly inserted. In this way, the guide unit and the locking unit can be linked together, that is, the circuit breaker trolley can achieve dual-rail synchronous constraint guidance through the first guide rail, the slider, and the anti-deviation plate, limiting lateral deviation and vertical jump, and when the guidance is in place, the trigger block squeezes the guide ramp to push up the limiter and lift the limit baffle to release the unlocking authority, and when the guidance is not in place, the locking obstruction is maintained, fundamentally preventing the trolley from deviating and forcibly inserting and damaging the contacts, ensuring the stable insertion of the moving and stationary contacts, and eliminating safety hazards such as electric arc and short circuit.

[0015] 2. This type of armored withdrawable switchgear with dual-rail precision guidance, by setting anti-deviation plates, screws, a second guide rail and guide grooves, allows the first guide rail to guide and limit the movement of the slider and the circuit breaker trolley. The protrusions on both sides of the slider form a fully fitted sliding fit with the guide groove on the inner wall of the first guide rail, restricting the lateral deviation and vertical jump of the circuit breaker trolley. The two sets of sliders are rigidly connected by anti-deviation plates to ensure that the movement displacement on both sides is completely consistent, realizing dual-rail synchronous constraint guidance, and ensuring that the moving contact and the stationary contact are connected without deviation or jamming.

[0016] 3. This armored withdrawable switchgear with dual-rail precision guidance, by setting the screw with different pitches at both ends, can achieve rapid feeding during the closing and insertion stage and rapid disconnection in the initial opening stage through the inner long pitch section, effectively shortening the arcing time, and can achieve slow alignment during the pre-closing stage and low-speed removal in the later opening stage through the outer short pitch section, reducing the impact on equipment operation.

[0017] 4. This type of armored withdrawable switchgear with double-track precision guidance, through the setting of a follow-up protection mechanism, can, when the circuit breaker trolley is pushed to the working position, drive the toothed plate to move upward through the drive plate, the gear and the rotating shaft rotate in the forward direction, and the two protective plates flip open to the sides to avoid the insertion path of the moving and stationary contacts, without interfering with the normal contact of the moving and stationary contacts; and when the circuit breaker trolley moves backward and the moving and stationary contacts separate, drive the toothed plate to move downward through the drive plate, the gear and the rotating shaft rotate in the opposite direction, and the two protective plates close in the middle to completely cover the area where the moving and stationary contacts are located, achieving insulation isolation, dust prevention, and protection against breakdown contamination. The protective action is completely synchronized with the movement of the trolley, avoiding the risk of exposed contacts.

[0018] 5. This type of armored withdrawable switchgear with dual-rail precision guidance, through the setting of a follow-up protection mechanism, can both allow the trigger block to insert into the second guide rail and press the limiting plate when the circuit breaker trolley reaches the working position along the guide rail, and drive the cranks on both sides to rotate inward through the slide groove, so that the clamping plate clamps the trigger block and the slider, forming an auxiliary clamping limit to restrain the swaying and movement of the circuit breaker trolley, and can also block the trigger block from continuing to move through the clamping plate, limiting the maximum movement displacement of the circuit breaker trolley, preventing the circuit breaker trolley from getting closer to the stationary contact, realizing the contact insertion limit, accurately preventing the contact from being excessively squeezed or not inserted in place, realizing reliable insertion limit, and further improving the contact connection quality and equipment operation stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the armored cabinet structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the circuit breaker trolley structure of the present invention.

[0022] Figure 4 This is a schematic diagram of the protective plate structure of the present invention.

[0023] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0024] Figure 6This is a schematic diagram of the linkage structure of the present invention.

[0025] Figure 7 This is a schematic diagram of the screw structure of the present invention.

[0026] Figure 8 This is a schematic diagram of the locking unit structure of the present invention.

[0027] Figure 9 This is a schematic diagram of the cross-sectional structure of the second guide rail of the present invention.

[0028] Figure 10 This is a schematic diagram of the limiting unit structure of the present invention.

[0029] Figure 11 This is a schematic diagram of the slider structure of the present invention.

[0030] In the diagram: 1. Armored cabinet; 2. Handcart compartment; 3. Cable compartment; 4. Circuit breaker handcart; 5. Stationary contact; 6. Moving contact; 7. Partition; 8. First guide rail; 9. Guide and limit assembly; 91. Guide unit; 911. Anti-deviation plate; 912. Screw; 9121. Long pitch section; 9122. Short pitch section; 913. Second guide rail; 914. Guide groove; 915. Protrusion; 92. Locking unit; 921. Compression spring; 9 22. Limiter; 923. Trigger block; 924. Guide ramp; 925. Limiting baffle; 926. Telescopic rod; 93. Limiting unit; 931. Crank; 932. Clamping plate; 933. Slide groove; 934. Limiting plate; 935. Return spring; 10. Slider; 11. Follow-up protective assembly; 111. Drive plate; 112. Rotating shaft; 113. Protective plate; 114. Connecting rod; 115. Gear; 116. Toothed plate. Detailed Implementation

[0031] 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.

[0032] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0033] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Please see Figure 1-11 This embodiment provides an armored withdrawable switchgear with dual-rail precision guidance, including an armored cabinet 1 and a truck compartment 2, a cable compartment 3 and a circuit breaker truck 4 disposed in the armored cabinet 1. The circuit breaker truck 4 is provided with a stationary contact 5. A partition 7 is fixedly installed between the truck compartment 2 and the cable compartment 3. A moving contact 6 that cooperates with the stationary contact 5 is fixedly installed on the partition 7. First guide rails 8 are fixedly installed on both sides of the inner wall of the truck compartment 2. A guide limiting component 9 for guiding and limiting the movement of the circuit breaker truck 4 is fixedly installed on the first guide rail 8. The guide and limit assembly 9 includes a guide unit 91 and a locking unit 92 and a limit unit 93 used in conjunction with the guide unit 91. The guide unit 91 restricts the movement of the circuit breaker trolley 4, and the locking unit 92 can only release the unlocking permission when the circuit breaker trolley 4 is guided into place. Each first guide rail 8 has a slider 10 that is fitted and slidably installed inside it. The partition 7 is provided with a follow-up protective component 11 that works in conjunction with the guide limit component 9. Two drive plates 111 are provided through the follow-up protective component 11. The drive plates 111 are rotatably connected to the slider 10 on the same side.

[0036] In this embodiment, the "guided positioning" refers to the situation where the circuit breaker trolley 4, under the precise guidance constraint of the double-rail system formed by the first guide rail 8 and the guide unit 91, reaches the designated position without deviation or tilting. Only then can the locking unit 92 mechanically release the limiting obstruction of the slider 10 and release the unlocking authority. If the circuit breaker trolley 4 fails to achieve precise guidance or fails to reach the designated position, the locking unit 92 remains locked and does not release the unlocking authority, thereby achieving a forced linkage constraint between guidance and locking, improving the operational safety and guidance reliability of the circuit breaker trolley 4.

[0037] The guide unit 91 includes an anti-deviation plate 911, a screw 912, and a second guide rail 913. There are two second guide rails 913, which are fixedly installed on both sides of the handcart compartment 2. The first guide rail 8 and the second guide rail 913 are both arranged along the travel direction of the circuit breaker handcart 4. The anti-deviation plate 911 is fixedly installed between two sliders 10. The screw 912 is threaded onto the anti-deviation plate 911. Both sliders 10 are fixedly connected to the circuit breaker handcart 4. The first guide rail 8 has guide grooves 914 on both sides for the sliders 10 and the anti-deviation plate 911 to slide. The sliders 10 have protrusions 915 on both sides, and the protrusions 915 of the sliders 10 slide in the guide grooves 914 on the same side.

[0038] Specifically, the operator rotates the screw 912 to move the anti-deviation plate 911, the slider 10, and the circuit breaker trolley 4. The first guide rail 8 guides and limits the movement of the slider 10 and the circuit breaker trolley 4. The protrusions 915 on both sides of the slider 10 and the guide grooves 914 on the inner wall of the first guide rail 8 form a fully fitted sliding fit in the upper and lower and left and right directions, which limits the lateral deviation and vertical jump of the circuit breaker trolley 4. The two sets of sliders 10 are rigidly connected by the anti-deviation plate 911 to ensure that the movement displacement on both sides is completely consistent, realize the dual-rail synchronous constraint guidance, and ensure that the moving contact 6 and the stationary contact 5 are connected without deviation or jamming.

[0039] Furthermore, the screw 912 is composed of a long pitch section 9121 and a short pitch section 9122. The long pitch section 9121 is located on the inner side of the screw 912 near the working position of the circuit breaker trolley 4, and the short pitch section 9122 is located on the outer side of the screw 912 near the test position of the circuit breaker trolley 4, so as to realize the speed control of the circuit breaker trolley 4 for quick closing and quick opening.

[0040] Specifically, when the circuit breaker trolley 4 initially moves, it is located in the short-pitch section 9122. The circuit breaker trolley 4 travels a short distance with each rotation of the screw 912, achieving slow pre-alignment and ensuring the smooth approach of the moving contact 6 and the stationary contact 5. When the circuit breaker trolley 4 approaches the working position and the moving contact 6 and stationary contact 5 are about to connect, it enters the long-pitch section 9121. The circuit breaker trolley 4 travels a long distance with each rotation of the screw 912, achieving rapid connection, significantly shortening the contact arcing time, reducing the risk of arc erosion, and thus ensuring smooth operation. By setting different pitches at both ends of the screw 912, it can be adapted to the different speed requirements of the circuit breaker trolley 4 for closing and opening. The long pitch section 9121 is set on the inner side of the screw 912 near the working position of the circuit breaker trolley 4, which facilitates slow alignment during the pre-connection stage and rapid feeding during the insertion stage, shortening the arcing time. During opening, the contacts can be quickly disconnected first. The short pitch section 9122 is set on the outer side of the screw 912 near the test position of the circuit breaker trolley 4, which reduces the travel speed of the circuit breaker trolley 4 and avoids impact.

[0041] Furthermore, the locking unit 92 includes a compression spring 921 fixedly mounted on the second guide rail 913. A limiter 922 is fixedly mounted on the top of the compression spring 921. A trigger block 923 is fixedly mounted on the side of the slider 10 near the second guide rail 913. One end of the limiter 922 has a guide slope 924 that cooperates with the trigger block 923, and the other end is fixedly connected to a limit baffle 925 inserted in the second guide rail 913.

[0042] In detail, during the process of the circuit breaker trolley 4 driving the slider 10 to move along the first guide rail 8, the movement of the slider 10 drives the trigger block 923 to move synchronously and gradually approach the limiter 922 on the second guide rail 913. The trigger block 923 presses the guide slope 924 at the end of the limiter 922. Under the action of the slope, the limiter 922 overcomes the elastic force of the compression spring 921 and moves upward, driving the limit baffle 925 to move upward, releasing the obstruction of the second guide rail 913 and the obstruction of the slider 10's movement, and realizing automatic unlocking after guiding into place; Specifically, when the circuit breaker trolley 4 deviates during its movement, meaning it fails to be guided into position, the limit baffle 925, inserted within the second guide rail 913, blocks the movement of the slider 10. The circuit breaker trolley 4 cannot continue moving towards the stationary contact 5, thus preventing the insertion of the moving contact 6 and the stationary contact 5. When the circuit breaker trolley 4 does not deviate during its movement, the slider 10's movement causes the trigger block 923 to press against the guide ramp 924, pushing the limiter 922 upwards. This causes the limit baffle 925 to lift, releasing the obstruction to the slider 10's movement and releasing the unlocking authority, allowing the moving contact 6 and the stationary contact 5 to be smoothly inserted. This links the guiding unit 91 and the locking unit 92 together and mutually constrains them, preventing forced insertion and damage to the contacts when the circuit breaker trolley 4 is deviated. This ensures the stability of the insertion of the moving contact 6 and the stationary contact 5, avoiding situations such as arcing and short circuits.

[0043] The compression spring 921 is equipped with a telescopic rod 926, and the two ends of the telescopic rod 926 are fixedly connected to the second guide rail 913 and the limiter 922 respectively. The telescopic rod 926 can guide and limit the movement of the limiter 922 to ensure the stability of the limiter 922 when it moves up and down.

[0044] Furthermore, the limiting unit 93 is disposed within the second guide rail 913. The limiting unit 93 includes two cranks 931 rotatably mounted within the second guide rail 913. The two cranks 931 are symmetrically arranged. A clamping plate 932 is fixedly mounted at one end of the cranks 931, and a sliding groove 933 is opened at the other end of the cranks 931. The same limiting plate 934 is slidably mounted in the two sliding grooves 933.

[0045] In detail, when the circuit breaker trolley 4 reaches the working position along the first guide rail 8 and the second guide rail 913, the trigger block 923 inserts into the second guide rail 913 and presses against the limiting plate 934. The limiting plate 934 and the sliding groove 933 on the crank 931 form a sliding transmission, driving the left and right sets of cranks 931 to rotate synchronously inward, so that the clamping plate 932 at the end of the crank 931 clamps the slider 10 or the trigger block 923, forming an auxiliary clamping limit, further restraining the swaying and lurching of the circuit breaker trolley 4, improving the operational stability, and at the same time... When the clamping plate 932 clamps the trigger block 923, it will block the movement of the trigger block 923 and the slider 10, restricting the subsequent displacement of the circuit breaker trolley 4. This prevents the circuit breaker trolley 4 from continuing to move towards the stationary contact 5, thereby limiting the maximum movement displacement of the trigger block 923 and the circuit breaker trolley 4. In other words, when the circuit breaker trolley 4 cannot continue to move towards the stationary contact 5, it indicates that the moving contact 6 and the stationary contact 5 are properly inserted, thus avoiding excessive compression of the stationary contact 5 by the moving contact 6 and preventing the moving contact 6 and the stationary contact 5 from not being properly inserted.

[0046] A reset spring 935 is fixedly installed on the limiting plate 934. The end of the reset spring 935 away from the limiting plate 934 is fixedly connected to the partition plate 7. By setting the reset spring 935, when the trigger block 923 moves out of the second guide rail 913, the reset spring 935 pushes the limiting plate 934 to reset under its own elastic force, so that it can be used again next time.

[0047] Furthermore, the follow-up protective assembly 11 also includes two rotating shafts 112 rotatably mounted on the partition 7. Protective plates 113 are fixedly mounted on both rotating shafts 112, and the two protective plates 113 are symmetrically and alternately distributed. A connecting rod 114 is rotatably mounted on the top of one of the protective plates 113, and the other end of the connecting rod 114 is rotatably connected to the bottom of the other protective plate 113, so that when one protective plate 113 rotates, it smoothly drives the other protective plate 113 to rotate through the connecting rod 114. A gear 115 is fixedly mounted on the rotating shaft 112, and toothed plates 116 that mesh with the gear 115 are slidably mounted on both sides of the partition 7. The bottom end of the toothed plate 116 is rotatably connected to the drive plate 111 on the same side.

[0048] Specifically, when the circuit breaker trolley 4 moves, the sliders 10 on both sides synchronously drive the drive plate 111 to move. The drive plate 111 pushes the toothed plate 116 to slide up and down on the partition 7. The movement of the toothed plate 116 drives the gear 115 and the rotating shaft 112 to rotate. The two sets of protective plates 113 form a cross linkage through the connecting rod 114, so that the two protective plates 113 open and close synchronously. That is, when the circuit breaker trolley 4 is pushed to the working position, the slider 10 moves forward, and drives the toothed plate 116 to move upward through the drive plate 111. The gear 115 and the rotating shaft 112 rotate in the forward direction, and the two protective plates 113 flip open to the sides to avoid the insertion path of the moving and stationary contacts and not interfere with the normal contact of the moving contact 6 and the stationary contact 5. When the circuit breaker trolley 4 moves backward and the moving contact 6 and stationary contact 5 separate, the slider 10 moves backward and drives the toothed plate 116 to move downward through the drive plate 111. The gear 115 rotates in the opposite direction to the rotating shaft 112, and the two protective plates 113 close together in the middle, completely covering the area where the stationary contact 5 is located, so as to achieve insulation isolation, dust prevention, and prevent breakdown and contamination between the moving contact 6 and the stationary contact 5.

[0049] The partition plate 7 has a groove for the toothed plate 116 to slide, which can ensure the stability of the toothed plate 116 during movement.

[0050] During operation, the operator rotates the screw 912, causing the anti-deviation plate 911, the slider 10, and the circuit breaker trolley 4 to move forward along the trolley's travel direction. The first guide rail 8 guides and limits the movement of the slider 10 and the circuit breaker trolley 4. The protrusions 915 on both sides of the slider 10 form a fully fitted sliding engagement with the guide grooves 914 on the inner wall of the first guide rail 8, restricting the lateral offset and vertical jump of the circuit breaker trolley 4. The two sets of sliders 10 are rigidly connected by the anti-deviation plate 911, ensuring that the movement displacement on both sides is completely consistent, achieving double... With track-synchronous constraint guidance, when the circuit breaker trolley 4 initially moves, it is located in the short pitch section 9122 area. The circuit breaker trolley 4 travels a small distance with one rotation of the screw 912, achieving slow pre-alignment and ensuring that the stationary contact 5 and the moving contact 6 approach smoothly. When the circuit breaker trolley 4 approaches the working position and the moving contact 6 and the stationary contact 5 are about to be inserted, it enters the long pitch section 9121 area. The circuit breaker trolley 4 travels a large distance with one rotation of the screw 912, achieving rapid insertion, significantly shortening the contact arcing time and reducing the risk of arc erosion. If the circuit breaker trolley 4 deviates during its movement, that is, if the circuit breaker trolley 4 is not guided into position, the limit baffle 925 is inserted in the second guide rail 913, blocking the movement of the slider 10. The circuit breaker trolley 4 cannot continue to move towards the stationary contact 5, thus preventing the insertion of the moving contact 6 and the stationary contact 5. When the circuit breaker trolley 4 does not deviate during its movement, the movement of the slider 10 will drive the trigger block 923 to press the guide slope 924, pushing the limiter 922 upward, causing the limit baffle 925 to lift up, releasing the obstruction to the movement of the slider 10, thereby releasing the unlocking authority so that the moving contact 6 and the stationary contact 5 can be smoothly inserted and ensuring the precise docking of the moving contact 6 and the stationary contact 5. As the circuit breaker trolley 4 continues to move, when it reaches the working position along the first guide rail 8 and the second guide rail 913, the trigger block 923 inserts into the second guide rail 913 and presses against the limiting plate 934. The limiting plate 934 and the sliding groove 933 on the crank 931 form a sliding transmission, driving the left and right sets of cranks 931 to rotate synchronously inward. This causes the clamping plate 932 at the end of the crank 931 to clamp the slider 10 or the trigger block 923, forming an auxiliary clamping limit, further restraining the swaying and lurching of the circuit breaker trolley 4, and improving operational stability. Simultaneously, when the clamping plate 932 clamps the trigger block 923, it will block the movement of the trigger block 923 and the slider 10, restricting the subsequent displacement of the circuit breaker trolley 4, so that the circuit breaker trolley 4 cannot continue to move towards the stationary contact 5, thereby limiting the maximum movement displacement of the trigger block 923 and the circuit breaker trolley 4. That is, when the circuit breaker trolley 4 cannot continue to move towards the stationary contact 5, it indicates that the moving contact 6 and the stationary contact 5 are inserted in place, avoiding excessive compression of the stationary contact 5 by the moving contact 6, and avoiding the situation where the moving contact 6 and the stationary contact 5 are not inserted in place. At the same time, when the circuit breaker trolley 4 moves, the sliders 10 on both sides synchronously drive the drive plate 111 to move. The drive plate 111 pushes the toothed plate 116 to slide up and down on the partition 7. The movement of the toothed plate 116 drives the gear 115 and the rotating shaft 112 to rotate. The two sets of protective plates 113 form a cross linkage through the connecting rod 114, so that the two protective plates 113 open and close synchronously. That is, when the circuit breaker trolley 4 moves to the working position, the slider 10 moves forward, and drives the toothed plate 116 to move upward through the drive plate 111. The gear 115 and the rotating shaft 112 rotate in the forward direction, and the two protective plates 113 flip open to the sides to avoid the insertion path of the moving and stationary contacts and not interfere with the normal contact of the moving contact 6 and the stationary contact 5. When the circuit breaker trolley 4 moves backward and the moving contact 6 and stationary contact 5 separate, the slider 10 moves backward and drives the toothed plate 116 to move downward through the drive plate 111. The gear 115 rotates in the opposite direction to the rotating shaft 112, and the two protective plates 113 close together in the middle, completely covering the area where the stationary contact 5 is located, so as to achieve insulation isolation, dust prevention, and prevent breakdown and contamination between the moving contact 6 and the stationary contact 5.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-track precision-guided armored withdrawable switchgear, comprising an armored cabinet (1) and a trolley compartment (2), a cable compartment (3), and a circuit breaker trolley (4) disposed within the armored cabinet (1), wherein a stationary contact (5) is provided on the circuit breaker trolley (4), a partition (7) is fixedly installed between the trolley compartment (2) and the cable compartment (3), and a moving contact (6) cooperating with the stationary contact (5) is fixedly installed on the partition (7), characterized in that... ； Both sides of the inner wall of the handcart compartment (2) are fixedly installed with first guide rails (8), and guide limiting components (9) for guiding and limiting the movement of the circuit breaker handcart (4) are fixedly installed on the first guide rails (8). The guide and limit assembly (9) includes a guide unit (91), a locking unit (92) and a limit unit (93) used in conjunction with the guide unit (91). The guide unit (91) constrains the movement of the circuit breaker trolley (4), and the locking unit (92) can only release the unlocking permission when the circuit breaker trolley (4) is guided into place. Each of the first guide rails (8) has a slider (10) that is fitted and slidably installed inside. The partition (7) is provided with a follow-up protective component (11) that works in conjunction with the guide limit component (9). Two drive plates (111) are provided through the follow-up protective component (11). The drive plate (111) is rotatably connected to the slider (10) on the same side and moves synchronously with the guide stroke of the slider (10).

2. The armored withdrawable switchgear with dual-rail precision guidance according to claim 1, characterized in that, The guide unit (91) includes an anti-deviation plate (911), a screw (912), and a second guide rail (913). There are two second guide rails (913), which are fixedly installed on both sides of the handcart compartment (2). The first guide rail (8) and the second guide rail (913) are both arranged along the travel direction of the circuit breaker handcart (4). The anti-deviation plate (911) is fixedly installed between two sliders (10), and the screw (912) is threaded onto the anti-deviation plate (911).

3. The armored withdrawable switchgear with dual-rail precision guidance according to claim 2, characterized in that, The screw (912) is composed of a long pitch section (9121) and a short pitch section (9122). The long pitch section (9121) is located on the inner side of the screw (912) near the working position of the circuit breaker trolley (4), and the short pitch section (9122) is located on the outer side of the screw (912) near the test position of the circuit breaker trolley (4), so as to realize the speed control of the circuit breaker trolley (4) for quick closing and quick opening.

4. The armored withdrawable switchgear with dual-rail precision guidance according to claim 3, characterized in that, The first guide rail (8) has guide grooves (914) on both sides for sliding of the slider (10) and the anti-deviation plate (911). The slider (10) has protrusions (915) on both sides, and the protrusions (915) of the slider (10) slide in the guide groove (914) on the same side.

5. The armored withdrawable switchgear with dual-rail precision guidance according to claim 2, characterized in that, The locking unit (92) includes a compression spring (921) fixedly installed on the second guide rail (913). A limiter (922) is fixedly installed on the top of the compression spring (921). A trigger block (923) is fixedly installed on the side of the slider (10) near the second guide rail (913). One end of the limiter (922) is provided with a guide slope (924) that cooperates with the trigger block (923), and the other end is fixedly connected to a limit baffle (925) inserted in the second guide rail (913).

6. The armored withdrawable switchgear with dual-rail precision guidance according to claim 5, characterized in that, The compression spring (921) is provided with a telescopic rod (926), and the two ends of the telescopic rod (926) are fixedly connected to the second guide rail (913) and the limiter (922) respectively.

7. The armored withdrawable switchgear with dual-rail precision guidance according to claim 2, characterized in that, The limiting unit (93) is disposed in the second guide rail (913). The limiting unit (93) includes two cranks (931) rotatably installed in the second guide rail (913). The two cranks (931) are symmetrically arranged. A clamping plate (932) is fixedly installed at one end of the crank (931). A sliding groove (933) is opened at the other end of the crank (931). The same limiting plate (934) is slidably installed in the two sliding grooves (933).

8. The armored withdrawable switchgear with dual-rail precision guidance according to claim 7, characterized in that, A reset spring (935) is fixedly installed on the limiting plate (934), and the end of the reset spring (935) away from the limiting plate (934) is fixedly connected to the partition plate (7).

9. The armored withdrawable switchgear with dual-rail precision guidance according to claim 1, characterized in that, The follow-up protective assembly (11) also includes two rotating shafts (112) rotatably mounted on the partition (7). Protective plates (113) are fixedly mounted on both rotating shafts (112), and the two protective plates (113) are symmetrically staggered. A connecting rod (114) is rotatably mounted on the top of one of the protective plates (113). The other end of the connecting rod (114) is rotatably connected to the bottom of the other protective plate (113), so that when one of the protective plates (113) rotates, it smoothly drives the other protective plate (113) to rotate through the connecting rod (114). A gear (115) is fixedly mounted on the rotating shaft (112). Toothed plates (116) that mesh with the gear (115) are slidably mounted on both sides of the partition (7). The bottom end of the toothed plate (116) is rotatably connected to the drive plate (111) on the same side.

10. A double-rail precision-guided armored withdrawable switchgear according to claim 9, characterized in that, The partition (7) has a groove for the toothed plate (116) to slide.

Images