A high-low voltage switch cabinet convenient for maintenance

Abstract

The application discloses a high-low voltage switch cabinet convenient to overhaul, and relates to the technical field of electrical cabinets.The high-low voltage switch cabinet convenient to overhaul comprises a cabinet body, a drawer is arranged in the cabinet body, a handle is arranged on the surface of the drawer, a stand is arranged on the inner wall top of the drawer, an overhaul anti-pinch mechanism is arranged on the top of the stand, a protection mechanism is arranged on the right side of the drawer, a damage prevention mechanism is arranged at the rear end of the drawer, a convex groove is formed in the rear part of the cabinet body; wherein the overhaul anti-pinch mechanism comprises a handle rod, a connecting shaft, a limiting block, a spring plate, a poking block, a hydraulic cylinder, a hydraulic rod, a rotating shaft and a rotating plate, a circular groove is formed in the top of the stand, the application enlarges the space for overhaul, so that the device can be conveniently overhauled by overhaul personnel, and the equipment in the drawer is prevented from being arranged at the corner connection position, so that the overhaul space of the overhaul personnel is not narrow and the overhaul is not difficult.

Description

Technical Field

[0001] This invention relates to the field of electrical cabinet technology, specifically to a high- and low-voltage switchgear that is easy to maintain. Background Technology

[0002] High and low voltage switchgear is a type of electrical equipment. External lines first enter the main control switch inside the cabinet, and then enter the branch control switches. Each branch circuit is set according to its needs. Such as instruments, automatic control, motor magnetic switches, various AC contactors, etc. Some also have high-voltage and low-voltage switchgear, and have high-voltage busbars, such as power plants. Some also have underfrequency load shedding to protect the main equipment.

[0003] Patent publication number CN115313196B relates to a high- and low-voltage switchgear that facilitates maintenance, belonging to the field of electrical cabinet technology. The switchgear includes a cabinet body, an electrical component mounting bracket, and a cabinet door; it also includes two supporting components. The cabinet door has an arc-shaped guide. The supporting components include a supporting arm, a receiving guide groove, a supporting column, an elastic sliding member, a base support, and a push-pull rod. The receiving guide groove is formed on the supporting arm, and the elastic sliding member is located inside the receiving guide groove. The supporting column is located at the end of the supporting arm away from the cabinet door and can support the bottom of the electrical component mounting bracket when it slides out of the cabinet. One end of the base support is rotatably connected to one end of the receiving guide groove. The elastic sliding member has a pushing column that can move along the outer wall of the arc-shaped guide. This patent has a simple structure, allows the switchgear and electrical components to be placed entirely outside the cabinet body while ensuring stability during maintenance, and is easy to operate and highly practical.

[0004] The aforementioned patent allows the switchgear to be placed entirely outside the cabinet, ensuring stability during maintenance. It is easy to operate and highly practical. However, when maintenance personnel are maintaining the drawer-type high and low voltage switchgear, the narrow space at the corner of the drawer may affect their maintenance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a high- and low-voltage switchgear that is easy to maintain, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high and low voltage switchgear that is easy to maintain, comprising a cabinet body, a drawer provided inside the cabinet body, a handle provided on the surface of the drawer, a column provided on the top of the inner wall of the drawer, a maintenance anti-pinch mechanism provided on the top of the column, a protective mechanism provided on the right side of the drawer, an anti-vandalism mechanism provided at the rear end of the drawer, and a convex groove provided at the rear of the cabinet body.

[0007] The anti-pinch mechanism includes a gripping rod, a connecting shaft, a limiting block, a spring plate, a piercing block, a hydraulic cylinder, a hydraulic rod, a rotating shaft, and a rotating plate. A circular groove is formed at the top of the column, the size of which matches the limiting block. The limiting block is rotatably mounted within the groove. The connecting shaft is fixedly mounted on the top of the limiting block. The gripping rod is fixedly mounted at the top of the connecting shaft. The rotating shaft is rotatably mounted on the left and right sides of the bottom of the column. The rotating plate is fixedly mounted on the circumferential surface of the rotating shaft. The spring plate is slidably mounted on the surface of the rotating plate. The piercing block is fixedly mounted on the side of the spring plate near the rotating plate. The hydraulic cylinder is fixedly mounted on the side of the rotating plate near the spring plate. The hydraulic rod is fixedly mounted on the right side of the bottom of the column. The hydraulic cylinder compresses fluid, which enters the hydraulic rod through a pipe inside the rotating plate. The fluid pushes the hydraulic rod out, and the extended hydraulic rod inserts into a fixed groove on the rotating shaft. The hydraulic rod's insertion into the fixed groove fixes the rotating shaft, preventing the rotating plate from resetting.

[0008] According to the above technical solution, the rotating plate and spring plate are arranged in four sets, so that the drawer has a larger area for easy maintenance. The hydraulic cylinder is on the movement trajectory of the chuck, and the chuck moves towards the rotating plate to push the piston in the hydraulic cylinder to compress.

[0009] According to the above technical solution, a fixing groove is provided on the right side of the rotating shaft. The fixing groove is adapted to the size of the hydraulic rod. After the hydraulic rod is inserted into the fixing groove, the rotating shaft is fixed. A compression spring is provided between the spring plate and the rotating plate. The compression spring is responsible for indicating whether the spring plate is in contact with the object.

[0010] According to the above technical solution, the protection mechanism includes a pressure rod, a triangular rod, a sliding plate, a push block, an inclined block, a power switch, a limiting block, a push rod, a round shaft, a scraper, and a filter plate. The pressure rod is slidably mounted on the outer surface of the column, the triangular rod is slidably mounted on the bottom of the drawer, the sliding plate is slidably mounted on the right side of the cabinet, the push block is fixedly mounted on the right side of the sliding plate, the inclined block is slidably mounted on the inner surface of the cabinet, the power switch is fixedly mounted on the inner surface of the cabinet, the limiting block is fixedly mounted on the right side of the inclined block, the push rod is hinged to the right side of the inclined block, the filter plate is fixedly mounted on the inner right side of the cabinet, the round shaft is fixedly mounted on the left side of the filter plate, and the scraper is rotatably mounted on the circumferential surface of the round shaft. When the triangular rod moves to the right, it contacts the sliding plate, pushes the sliding plate to the right, contacts the push block, pushes the inclined block downward, and the inclined block moves downward to contact the power switch, thus turning off the power switch.

[0011] According to the above technical solution, the triangular rod is on the movement trajectory of the pressure rod. When the pressure rod moves downward, it pushes the triangular rod to move to the right. The slide plate is on the movement trajectory of the triangular rod. When the triangular rod moves to the right, it pushes the slide plate to move to the right.

[0012] According to the above technical solution, the inclined block is on the movement trajectory of the push block. The push block moves to the right and pushes the inclined block to move downward. A reset spring is provided between the inclined block and the inner surface of the cabinet. The reset spring is responsible for resetting the inclined block.

[0013] According to the above technical solution, the anti-vandalism mechanism includes a stand, a sliding column, a push rod, a take-up reel, a concave rod, an arc-shaped block, an L-shaped rod, a transmission column, a rotating block, a limiting block, a fixing block, a rotating shaft, and a push rod. A convex groove is provided at the rear of the cabinet. The stand is fixedly installed on the bottom surface of the convex groove. The sliding column is slidably installed on the top of the stand. The push rod is fixedly installed on the top of the sliding column. The rotating shaft is fixedly installed on the left and right sides of the sliding column. The take-up reel is rotatably installed on the circumferential surface of the rotating shaft. The concave rod is slidably installed on the bottom surface of the convex groove. The bottom of the left and right sides of the drawer has openings... The drawer has a receiving groove. The arc-shaped block is slidably installed in the receiving groove. The push rod is slidably installed on the top of the concave rod. The fixing block is fixedly installed on the top of the concave rod. The transmission column rotates through the fixing block. The L-shaped rod is fixedly installed on the circumferential surface of the transmission column. The rotating block is fixedly installed on the circumferential surface of the transmission column. The limiting block is fixedly installed on the circumferential surface of the transmission column. The end of the concave rod has a vertical groove. When the concave rod moves towards the middle of the cabinet, it pushes the arc-shaped block upward. Then, the arc-shaped block resets and locks into the vertical groove. The arc-shaped block restricts the concave rod from resetting, and the concave rod restricts the drawer from continuing to move outward.

[0014] According to the above technical solution, a square groove is provided at the top of the concave rod, and the square groove is adapted to the size of the L-shaped rod. After the L-shaped rod is inserted into the square groove, it limits the concave rod. The arc-shaped block is on the movement trajectory of the push rod. The push rod moves towards the arc-shaped block and pushes the arc-shaped block upward. A V-shaped groove is provided on the side of the concave rod near the push rod. The V-shaped groove is responsible for transmitting the thrust of the push rod. The concave rod is on the movement trajectory of the push rod. The push rod moves towards the drawer and pushes the concave rod towards the center of the device.

[0015] This invention provides a high- and low-voltage switchgear that is easy to maintain. It has the following advantages:

[0016] (1) In this invention, when maintenance personnel need to repair the device, they can pull out the drawer by holding the handle to repair the equipment inside the drawer. When the equipment is located at the corner of the drawer, making repair difficult, the maintenance personnel can hold the handle and then rotate it clockwise. At the same time, the limiting block rotates clockwise to release the limiting on the rotating plate and the column. The rotating plate rotates outward to a horizontal angle, making the corner of the drawer disappear and increasing the space available for repair. This makes the device convenient for maintenance personnel to repair and prevents the equipment inside the drawer from being located at the corner joint, which would make the repair space too small and cause repair difficulties. When maintenance personnel reset the rotating plate after maintenance, if any equipment or wiring deviates from its original position, the resetting of the rotating plate will cause the spring plate to reset. When the spring plate comes into contact with the deviated equipment or wiring, it will be compressed and move towards the rotating plate. The push rod will push the hydraulic cylinder to compress, and the compressed fluid in the hydraulic cylinder will enter the hydraulic rod through a pipe set inside the rotating plate. The fluid will push the hydraulic rod to extend, and the hydraulic rod will extend and insert into the fixed groove opened on the rotating shaft. The hydraulic rod inserted into the fixed groove will fix the rotating shaft and prevent the rotating plate from resetting. This prevents damage to the equipment or wiring when the rotating plate is closed if the equipment or wiring deviates from its original position.

[0017] (2) In this invention, when the maintenance personnel release the limit on the rotating plate and the column, the rotating plate pushes the pressure rod to move downward, the pressure rod pushes the triangular rod to move to the right, the triangular rod pushes the sliding plate to move to the right, the triangular block pushes the inclined block to move downward, the inclined block moves downward and contacts the power switch, the inclined block moves downward and closes the power switch, preventing the maintenance personnel from forgetting to disconnect the power when they are maintaining the equipment, so that the high and low voltage switch cabinet is still energized when the maintenance personnel are working, which may lead to a safety accident. At the same time, when the push rod contacts the scraper, the scraper pushes the push rod to rotate upward, and then the torsion spring resets the push rod. When the maintenance personnel finish maintenance and reset the rotating plate, the rotating plate resets the sliding plate, the sliding plate resets the inclined block to reset upward, the inclined block resets upward and drives the push rod and the limit block to reset upward. The push rod hits the rear end of the scraper and causes the scraper to rotate clockwise around the circular axis. The scraper rotates clockwise around the circular axis to scrape the dirt off the filter plate, preventing too much dust in the cabinet from affecting the precision electronic components, and at the same time extending the working time of the filter plate.

[0018] (3) In this invention, when maintenance personnel quickly pull the drawer, the equipment wiring is released, driving the take-up reel to rotate. When the pulling force is too large, the reaction force of the take-up reel is transmitted to the sliding column, causing the sliding column to move towards the drawer. The concave rod pushes the arc block upward, and then the arc block is reset by gravity and locked into the vertical groove. The arc block restricts the concave rod from resetting, and the concave rod restricts the drawer from continuing to move outward, preventing maintenance personnel from quickly pulling the drawer and damaging the electronic components or affecting the wiring of the electronic components. To continue pulling out the drawer, hold the rotating block and turn it clockwise. The clockwise rotation of the rotating block causes the transmission column to rotate clockwise. The clockwise rotation of the transmission column disengages the L-shaped rod from the square slot, releasing it from the limit on the push rod. At the same time, the clockwise rotation of the transmission column causes the limiting block to lock the front end of the push rod. At this point, pushing the rotating block towards the arc-shaped block will cause the push rod to move towards the arc-shaped block. The push rod pushes the arc-shaped block upward, releasing the arc-shaped block from the limit on the concave rod. The concave rod is reset by the spring, and the drawer can move normally. 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 showing the positional relationship between the grip and the column structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the anti-pinch mechanism for maintenance of the present invention;

[0022] Figure 4 For the present invention Figure 3 Enlarged diagram of part A in the middle;

[0023] Figure 5 This is a schematic diagram showing the structural positional relationship between the stamping block and the hydraulic cylinder of the present invention;

[0024] Figure 6 This is a schematic diagram showing the positional relationship between the compression bar and the triangular bar structure of the present invention;

[0025] Figure 7 This is a schematic diagram showing the positional relationship between the inclined block and the inner wall structure of the cabinet in this invention;

[0026] Figure 8 This is a schematic diagram showing the positional relationship between the triangular rod and the sliding plate structure of the present invention;

[0027] Figure 9 This is a schematic diagram of part of the protective mechanism of the present invention;

[0028] Figure 10 This is a schematic diagram showing the positional relationship between the support platform and the inner wall structure of the cabinet in this invention;

[0029] Figure 11 This is a schematic diagram showing the positional relationship between the push rod and the concave rod structure of the present invention;

[0030] Figure 12 This is a schematic diagram showing the positional relationship between the push rod and the arc-shaped block structure of the present invention.

[0031] In the diagram: 1. Cabinet body; 2. Drawer; 3. Handle; 401. Handle rod; 402. Connecting shaft; 403. Limiting block; 404. Spring plate; 405. Stamping block; 406. Hydraulic cylinder; 407. Hydraulic rod; 408. Rotating shaft; 409. Rotating plate; 501. Pressure rod; 502. Triangular rod; 503. Slide plate; 504. Push block; 505. Inclined block; 506. Power switch; 507. Limiting block. 508. Block; 509. Push rod; 510. Round shaft; 511. Scraper rod; 512. Filter plate; 601. Stand; 602. Sliding column; 603. Push rod; 604. Take-up reel; 605. Concave rod; 606. Arc-shaped block; 607. L-shaped rod; 608. Transmission column; 609. Rotating block; 610. Limiting block; 611. Fixed block; 612. Rotating shaft; 613. Push rod; 7. Column. Detailed Implementation

[0032] 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.

[0033] Please see Figures 1-12 One embodiment of the present invention is: a high and low voltage switch cabinet that is easy to maintain, including a cabinet body 1, a drawer 2 is provided inside the cabinet body 1, a handle 3 is provided on the surface of the drawer 2, a column 7 is provided on the top of the inner wall of the drawer 2, a maintenance anti-pinch mechanism is provided on the top of the column 7, a protection mechanism is provided on the right side of the drawer 2, an anti-vandalism mechanism is provided at the rear end of the drawer 2, and a convex groove is provided at the rear of the cabinet body 1.

[0034] The maintenance anti-pinch mechanism includes a gripping rod 401, a connecting shaft 402, a limiting block 403, a spring plate 404, a piercing block 405, a hydraulic cylinder 406, a hydraulic rod 407, a rotating shaft 408, and a rotating plate 409. A circular groove is provided on the top of the column 7, the size of which is adapted to the limiting block 403. The limiting block 403 is rotatably installed within the circular groove. The connecting shaft 402 is fixedly installed on the top of the limiting block 403. The gripping rod 401 is fixedly installed on the top of the connecting shaft 402. The rotating shaft 408 is rotatably installed on the bottom of the column 7. On the left and right sides, the rotating plate 409 is fixedly installed on the circumferential surface of the rotating shaft 408, the spring plate 404 is slidably installed on the surface of the rotating plate 409, the stamping block 405 is fixedly installed on the spring plate 404 on the side near the rotating plate 409, the hydraulic cylinder 406 is fixedly installed on the rotating plate 409 on the side near the spring plate 404, and the hydraulic rod 407 is fixedly installed on the bottom right side of the column 7 to prevent the rotating plate 409 from resetting, so as to prevent damage to the equipment or wiring when the rotating plate 409 is closed after the equipment or wiring has deviated from its original position.

[0035] Four sets of rotating plates 409 and spring plates 404 are provided, making the area of ​​drawer 2 more convenient for maintenance. The hydraulic cylinder 406 is on the movement trajectory of the tamper block 405. The tamper block 405 moves towards the rotating plate 409 to push the piston in the hydraulic cylinder 406 to compress.

[0036] A fixing groove is provided on the right side of the rotating shaft 408. The fixing groove is adapted to the size of the hydraulic rod 407. After the hydraulic rod 407 is inserted into the fixing groove, it fixes the rotating shaft 408. A compression spring is provided between the spring plate 404 and the rotating plate 409. The compression spring is responsible for indicating whether the spring plate 404 is in contact with the object.

[0037] The protective mechanism includes a pressure rod 501, a triangular rod 502, a sliding plate 503, a push block 504, a wedge block 505, a power switch 506, a limiting block 507, a push rod 508, a round shaft 509, a scraper 510, and a filter plate 511. The pressure rod 501 is slidably mounted on the outer surface of the column 7, the triangular rod 502 is slidably mounted on the bottom of the drawer 2, the sliding plate 503 is slidably mounted on the right side of the cabinet 1, the push block 504 is fixedly mounted on the right side of the sliding plate 503, and the wedge block 505 is slidably mounted on the inner surface of the cabinet 1. The switch 506 is fixedly installed on the inner surface of the cabinet 1, the limiting block 507 is fixedly installed on the right side surface of the inclined block 505, the push rod 508 is hinged to the right side surface of the inclined block 505, the filter plate 511 is fixedly installed on the inner right side of the cabinet 1, the round shaft 509 is fixedly installed on the left side surface of the filter plate 511, and the scraper 510 is rotatably installed on the circumferential surface of the round shaft 509. This prevents maintenance personnel from forgetting to disconnect the power when performing maintenance on the equipment, which could result in the high and low voltage switch cabinets remaining energized while maintenance personnel are working, leading to safety accidents.

[0038] Triangular rod 502 is on the trajectory of pressure rod 501. Pressure rod 501 moves downward, pushing triangular rod 502 to the right. Slide 503 is on the trajectory of triangular rod 502. Triangular rod 502 moves to the right, pushing slide 503 to the right.

[0039] The inclined block 505 is on the movement trajectory of the push block 504. The push block 504 moves to the right and pushes the inclined block 505 downward. A reset spring is provided between the inclined block 505 and the inner surface of the cabinet 1. The reset spring is responsible for resetting the inclined block 505.

[0040] The anti-vandalism mechanism includes a stand 601, a sliding column 602, a push rod 603, a take-up reel 604, a concave rod 605, an arc-shaped block 606, an L-shaped rod 607, a transmission column 608, a rotating block 609, a limiting block 610, a fixing block 611, a rotating shaft 612, and a push rod 613. A convex groove is provided at the rear of the cabinet 1. The stand 601 is fixedly installed on the bottom surface of the convex groove. The sliding column 602 is slidably installed on the top of the stand 601. The push rod 603 is fixedly installed on the top of the sliding column 602. The rotating shaft 612 is fixedly installed on the left and right sides of the sliding column 602. The take-up reel 604 is rotatably installed on the circumferential surface of the rotating shaft 612. The concave rod 605... The drawer 2 is slidably mounted on the bottom surface of the convex groove. The bottom of the left and right sides of the drawer 2 is provided with receiving grooves. The arc-shaped block 606 is slidably mounted in the receiving groove. The push rod 613 is slidably mounted on the top of the concave rod 605. The fixing block 611 is fixedly mounted on the top of the concave rod 605. The transmission column 608 rotates through the fixing block 611. The L-shaped rod 607 is fixedly mounted on the circumferential surface of the transmission column 608. The rotating block 609 is fixedly mounted on the circumferential surface of the transmission column 608. The limiting block 610 is fixedly mounted on the circumferential surface of the transmission column 608. The end of the concave rod 605 is provided with a vertical groove to prevent maintenance personnel from quickly pulling and damaging the electronic components and affecting the wiring of the electronic components.

[0041] The top of the concave rod 605 has a square groove that matches the size of the L-shaped rod 607. After the L-shaped rod 607 is inserted into the square groove, it limits the concave rod 605. The arc-shaped block 606 is on the movement trajectory of the push rod 613. The push rod 613 moves towards the arc-shaped block 606, pushing the arc-shaped block 606 upward. The side of the concave rod 605 near the push rod 603 has a V-shaped groove that transmits the thrust of the push rod 603. The concave rod 605 is on the movement trajectory of the push rod 603. The push rod 603 moves towards the drawer 2, pushing the concave rod 605 towards the center of the device.

[0042] During operation: When maintenance personnel need to repair the device, they can grasp handle 3 and pull out drawer 2 to repair the equipment inside. If the equipment is located at a corner of drawer 2, making repair difficult, the maintenance personnel can grasp the handle 401 at the top of the column 7 and rotate it clockwise. Rotating handle 401 clockwise causes connecting shaft 402 to rotate clockwise, which in turn causes limiting block 403 to rotate clockwise. This releases the restriction between rotating plate 409 and column 7, allowing rotating plate 409 to rotate outward to a horizontal angle, eliminating the corner of drawer 2 and increasing the space available for repair. This makes the device easier for maintenance personnel to repair and prevents difficulties caused by equipment being located at corners or joints in drawer 2. When the maintenance is complete, the maintenance personnel can reset rotating plate 409. When equipment or wiring deviates from its original position, the rotating plate 409 resets, causing the spring plate 404 to reset as well. When the spring plate 404 contacts the deviated equipment or wiring, it is compressed and moves closer to the rotating plate 409. This movement causes the stamping block 405 to move closer to the rotating plate 409. The stamping block 405 then contacts the hydraulic cylinder 406, pushing it to compress the hydraulic cylinder 406. The compressed fluid from the hydraulic cylinder 406 enters the hydraulic rod 407 through a pipe inside the rotating plate 409. The fluid pushes the hydraulic rod 407 to extend, inserting it into a fixed groove on the rotating shaft 408. This fixes the rotating shaft 408, preventing the rotating plate 409 from resetting and thus preventing damage to the equipment or wiring when the rotating plate 409 is closed.

[0043] When the maintenance personnel rotate the lever 401, it causes the connecting shaft 402 and the limiting block 403 to rotate simultaneously. When the limiting block 403 rotates to release the limiting direction of the rotating plate 409 and the column 7, the rotating plate 409 rotates outward to a horizontal angle. The rotating plate 409 rotates outward and contacts the pressure rod 501. The rotating plate 409 pushes the pressure rod 501 downward, and the pressure rod 501 moves downward and contacts the triangular rod 502. The pressure rod 501 pushes the triangular rod 502 to the right, and the triangular rod 502 moves to the right and contacts... Slide 503 is pushed to the right by triangular rod 502. Triangular rod 502 then contacts push block 504, which in turn pushes inclined block 505 downwards. Inclined block 505 then contacts power switch 506, shutting off power switch 506. This prevents maintenance personnel from forgetting to disconnect the power during equipment maintenance, ensuring the high and low voltage switchgear remains energized and preventing potential safety accidents. Additionally, when the inclined block... When 505 moves downwards, it causes the limiting block 507 and push rod 508 to move downwards. When push rod 508 contacts scraper 510, scraper 510 pushes push rod 508 to rotate upwards. Subsequently, torsion spring resets push rod 508. When maintenance personnel reset the rotating plate 409 after maintenance, the reset of rotating plate 409 causes pressure rod 501 to lose its thrust and reset. The reset of pressure rod 501 causes triangular rod 502 to lose its thrust and reset. The reset of triangular rod 502 causes sliding plate 503 to lose its thrust and reset. The reset of the slide plate 503 causes the inclined block 505 to lose its pushing force and reset upwards. The reset of the inclined block 505 drives the push rod 508 and the limiting block 507 to reset upwards. The push rod 508 strikes the rear end of the scraper 510, causing the scraper 510 to rotate clockwise around the circular shaft 509. The clockwise rotation of the scraper 510 around the circular shaft 509 scrapes away the dirt on the filter plate 511, preventing excessive dust in the cabinet 1 from affecting the precision electronic components, and extending the working time of the filter plate 511.

[0044] When maintenance personnel quickly pull drawer 2, the equipment wiring is released, causing the take-up reel 604 to rotate. When the pulling force is too great, the reaction force of the take-up reel 604 is transmitted to the sliding column 602, causing the sliding column 602 to move closer to drawer 2. The sliding column 602, moving closer to drawer 2, contacts the V-shaped groove on the concave rod 605, pushing the concave rod 605 closer to the center of cabinet 1. When the concave rod 605 moves closer to the center of cabinet 1, it pushes the arc-shaped block 606 upward. Subsequently, the arc-shaped block 606 resets and locks into the vertical groove, restricting the concave rod 605 from resetting. The concave rod 605 restricts the drawer 2 from continuing to move outward, preventing maintenance personnel from quickly pulling the drawer and damaging the electronic components. Damage to components and impact on the wiring of electronic components can cause issues. When maintenance personnel need to continue pulling out drawer 2, they should grasp the rotating block 609 and rotate it clockwise. The clockwise rotation of the rotating block 609 will cause the transmission column 608 to rotate clockwise. The clockwise rotation of the transmission column 608 will disengage the L-shaped rod 607 from the square slot, releasing the limit on the push rod 613. At the same time, the clockwise rotation of the transmission column 608 will cause the limiting block 610 to lock the front end of the push rod 613. At this time, pushing the rotating block 609 towards the arc-shaped block 606 will cause the push rod 613 to move towards the arc-shaped block 606. The push rod 613 will push the arc-shaped block 606 upward, releasing the limit on the concave rod 605 by the arc-shaped block 606. The concave rod 605 will then reset, and drawer 2 can move normally.

[0045] 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 variations 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 high- and low-voltage switchgear that is easy to maintain, comprising a cabinet (1), characterized in that: The cabinet (1) is equipped with a drawer (2) inside. The surface of the drawer (2) is equipped with a handle (3). The top of the inner wall of the drawer (2) is equipped with a column (7). The top of the column (7) is equipped with an inspection and anti-pinch mechanism. The right side of the drawer (2) is equipped with a protection mechanism. The rear end of the drawer (2) is equipped with an anti-damage mechanism. The rear part of the cabinet (1) is provided with a convex groove. The maintenance anti-pinch mechanism includes a grip (401), a connecting shaft (402), a limiting block (403), a spring plate (404), a stamping block (405), a hydraulic cylinder (406), a hydraulic rod (407), a rotating shaft (408), and a rotating plate (409). A circular groove is provided at the top of the column (7), the size of which is adapted to the limiting block (403). The limiting block (403) is rotatably installed within the circular groove. The connecting shaft (402) is fixedly installed on the top of the limiting block (403), and the grip (401) is fixedly installed on the connecting shaft (409). At the top of 402), the rotating shaft (408) is rotatably installed on the left and right sides of the bottom of the column (7), the rotating plate (409) is fixedly installed on the circumferential surface of the rotating shaft (408), the spring plate (404) is slidably installed on the surface of the rotating plate (409), the piercing block (405) is fixedly installed on the side of the spring plate (404) near the rotating plate (409), the hydraulic cylinder (406) is fixedly installed on the side of the rotating plate (409) near the spring plate (404), and the hydraulic rod (407) is fixedly installed on the bottom right side of the column (7); The protective mechanism includes a pressure rod (501), a triangular rod (502), a sliding plate (503), a push block (504), a wedge block (505), a power switch (506), a limiting block (507), a push rod (508), a round shaft (509), a scraper (510), and a filter plate (511). The pressure rod (501) is slidably mounted on the outer surface of the column (7), the triangular rod (502) is slidably mounted on the bottom of the drawer (2), the sliding plate (503) is slidably mounted on the right side of the cabinet (1), and the push block (504) is fixedly mounted on the sliding plate (505). On the right side of 03), the inclined block (505) is slidably installed on the inner surface of the cabinet (1), the power switch (506) is fixedly installed on the inner surface of the cabinet (1), the limiting block (507) is fixedly installed on the right side surface of the inclined block (505), the push rod (508) is hinged on the right side surface of the inclined block (505), the filter plate (511) is fixedly installed on the inner right side of the cabinet (1), the round shaft (509) is fixedly installed on the left side surface of the filter plate (511), and the scraper (510) is rotatably installed on the circumferential surface of the round shaft (509). The anti-vandalism mechanism includes a stand (601), a sliding column (602), a push rod (603), a take-up reel (604), a concave rod (605), an arc-shaped block (606), an L-shaped rod (607), a transmission column (608), a rotating block (609), a limiting block (610), a fixing block (611), a rotating shaft (612), and a push rod (613). A convex groove is provided at the rear of the cabinet (1). The stand (601) is fixedly installed on the bottom surface of the convex groove. The sliding column (602) is slidably installed on the top of the stand (601). The push rod (603) is fixedly installed on the top of the sliding column (602). The rotating shaft (612) is fixedly installed on the left and right sides of the sliding column (602). The take-up reel (604) rotates and is mounted on the top of the cabinet (1). Mounted on the circumferential surface of the rotating shaft (612), the concave rod (605) is slidably mounted on the bottom surface of the convex groove, the drawer (2) has receiving grooves on the bottom of its left and right sides, the arc-shaped block (606) is slidably mounted in the receiving groove, the push rod (613) is slidably mounted on the top of the concave rod (605), the fixing block (611) is fixedly mounted on the top of the concave rod (605), the transmission column (608) rotates through the fixing block (611), the L-shaped rod (607) is fixedly mounted on the circumferential surface of the transmission column (608), the rotating block (609) is fixedly mounted on the circumferential surface of the transmission column (608), the limiting block (610) is fixedly mounted on the circumferential surface of the transmission column (608), and the end of the concave rod (605) has a vertical groove.

2. The high and low voltage switchgear that is easy to maintain according to claim 1, characterized in that: The rotating plate (409) and the spring plate (404) are arranged in four sets, and the hydraulic cylinder (406) is on the movement trajectory of the piercing block (405).

3. The high and low voltage switchgear that is easy to maintain according to claim 1, characterized in that: A fixing groove is provided on the right side of the rotating shaft (408), and the fixing groove is adapted to the size of the hydraulic rod (407). A compression spring is provided between the spring plate (404) and the rotating plate (409).

4. A high- and low-voltage switchgear that is easy to maintain according to claim 1, characterized in that: The triangular rod (502) is on the motion trajectory of the pressure rod (501), and the sliding plate (503) is on the motion trajectory of the triangular rod (502).

5. A high- and low-voltage switchgear that is easy to maintain according to claim 1, characterized in that: The inclined block (505) is on the movement trajectory of the push block (504), and a reset spring is provided between the inclined block (505) and the inner surface of the cabinet (1).

6. A high- and low-voltage switchgear that is easy to maintain according to claim 1, characterized in that: The top of the concave rod (605) is provided with a square groove, which is adapted to the size of the L-shaped rod (607). The arc-shaped block (606) is on the movement trajectory of the push rod (613). The side of the concave rod (605) near the push rod (603) is provided with a V-shaped groove, and the concave rod (605) is on the movement trajectory of the push rod (603).

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