A quick fixing and dismounting high-low voltage cabinet

Abstract

The application relates to the technical field of high-low voltage cabinets, in particular to a quick fixing and dismounting type high-low voltage cabinet which comprises a cabinet and a sliding cabinet slidably arranged at one side of an opening of the cabinet, an extension piece is fixedly arranged in the cabinet and used for driving the sliding cabinet to slide, a first butt joint block and a second butt joint block are fixedly arranged at the sides of the cabinet and the sliding cabinet which are away from each other, and rollers are fixedly arranged at the bottoms of the first butt joint block and the second butt joint block; a base is used for being fixedly arranged on the ground, and a first wedge block and a second wedge block are fixedly arranged at the two sides of the base; the end faces of the first butt joint block and the second butt joint block which are away from each other are provided with a first butt joint groove and a second butt joint groove for the insertion of the first wedge block and the second wedge block; the quick fixing and dismounting of the high-low voltage cabinet and the ground are realized in the application, the traditional bolt connection mode is not needed, and the installation and dismounting efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the field of high and low voltage switchgear technology, specifically to a quick-fixing and disassembly type high and low voltage switchgear. Background Technology

[0002] High and low voltage switchgear are electrical equipment used in power systems to connect high-voltage or low-voltage cables. Generally, power supply bureaus and substations use high-voltage switchgear, which is connected to low-voltage switchgear after being stepped down by transformers. The low-voltage switchgear is then connected to the distribution boxes of various power users. High and low voltage switchgear integrates electrical components such as switches, circuit breakers, and protection devices. Its main function is to realize the opening, closing, control, and protection functions of circuits during the power generation, transmission, distribution, and energy conversion processes of the power system. Traditional high and low voltage switchgear is usually fixed to the ground or base with bolts. Each time it is disassembled and maintained, the bolts need to be turned multiple times to remove the switchgear. Since the bolts are located at the bottom of the switchgear, it is inconvenient to operate while turning the bolts. Disassembly takes a lot of time. Some switchgear cabinets are welded from plates and cannot be disassembled, or they are connected by screws, which makes it inconvenient to transport and maintain. Installation and transportation are labor-intensive and costly. Summary of the Invention

[0003] Technical problems to be solved In view of the above-mentioned shortcomings of the existing technology, this application provides a fast-fixing and disassembling high and low voltage switchgear, which can effectively solve the problem that traditional high and low voltage switchgear is usually fixed to the ground or base with bolts. Each time it is disassembled and maintained, the bolts need to be turned many times to remove the high and low voltage switchgear. In addition, since the bolts are installed at the bottom of the high and low voltage switchgear, it is inconvenient to operate during the bolt turning process, and a lot of time is spent during disassembly.

[0004] Technical solution: To achieve the above objectives, this application provides the following technical solution: This application provides a quick-fixing and disassembly type high and low voltage switch, including a cabinet and a sliding cabinet that is slidably installed on one side of the cabinet opening. An extension component for driving the sliding cabinet to slide is fixedly installed inside the cabinet. A first docking block and a second docking block are fixedly installed on the sides of the bottom of the cabinet and the sliding cabinet that are far apart from each other. Rollers are fixedly installed on the bottom of both the first docking block and the second docking block. The base is used to be fixedly installed on the ground, and a first wedge block and a second wedge block are fixedly installed on both sides respectively. The first wedge block and the second wedge block are used to dock with the first docking block and the second docking block respectively. The first docking block and the second docking block are provided with first docking grooves and second docking grooves on their far-away end faces for the first wedge block and the second wedge block to be inserted.

[0005] Furthermore, ventilation boxes are embedded and fixedly installed on both sides of the cabinet. The ventilation boxes are provided with multiple ventilation holes, and a shield is provided on the outside of the ventilation box. The middle of the shield is spaced apart from the outside of the ventilation box.

[0006] Furthermore, a lifting plate is installed inside the ventilation box, and a lifting mechanism is provided below the lifting plate to drive the lifting plate to move up and down. The lifting plate is provided with a connecting hole that communicates with the ventilation hole. When the sliding cabinet is in the slid-out state, the connecting hole communicates with the ventilation hole.

[0007] Furthermore, a partition is fixedly installed inside the cabinet, and the lifting mechanism includes a support rod rotatably installed below the lifting plate. The lower end of the support rod is inclined toward the sliding cabinet. A sliding block is rotatably installed below the support rod and is slidably installed on the partition. A push rod is fixedly installed on the side of the sliding cabinet facing the support rod. The push rod is used to push the lower end of the support rod toward the inside of the cabinet at the end of the sliding cabinet sliding toward the inside of the cabinet.

[0008] Furthermore, a sliding rod is fixedly installed on the partition, and an elastic element is provided on the sliding rod. The elastic element is used to drive the lifting plate to return to its original position downwards.

[0009] Furthermore, a fire extinguishing box is fixedly installed on the top of the cabinet, and a fire extinguisher is integrated inside the fire extinguishing box. A fire extinguishing nozzle is fixedly installed on the lower end of the fire extinguishing box, and the fire extinguishing nozzle is located on the side of the fire extinguishing box closest to the sliding cabinet.

[0010] Furthermore, the top of the lifting plate passes through the ventilation box and extends out. A support rod is fixedly installed on the top of the lifting plate. A rotating plate is rotatably installed on the side of the fire extinguisher box away from the sliding cabinet. The rotating plate is located directly above the support rod. Multiple fire extinguisher handles are installed at the upper end of the rotating plate. At the end of the lifting plate's upward movement, the support rod pushes the rotating plate upward, causing the rotating plate to squeeze the fire extinguisher handles, causing the fire extinguisher box to spray fire extinguishing dry powder or liquid carbon dioxide from the fire extinguishing nozzle.

[0011] Furthermore, a U-shaped baffle is installed at the bottom of the fire extinguisher box, and a rotating plate is rotatably installed inside the baffle. A torsion spring is installed on the rotating plate, which is used to drive the rotating plate to rotate downward on the side away from the sliding cabinet. A limiting protrusion is fixedly installed on the inner wall of the baffle to limit the downward rotation angle of the rotating plate.

[0012] Furthermore, the base is provided with multiple mounting through holes, and the base is installed to the surface to be installed by mounting bolts.

[0013] Beneficial effects: The technical solution provided in this application has the following advantages compared with the known public technology: 1. This application utilizes a wedge-and-groove structure formed by the first and second wedges on the base engaging with the first and second mating blocks on the bottom of the cabinet and sliding cabinet. This structure enables rapid installation and disassembly of high and low voltage cabinets from the ground, eliminating the need for traditional bolt connections and significantly improving installation and disassembly efficiency. Furthermore, the rollers allow the cabinet and sliding cabinet to be moved as a whole, reducing the difficulty of handling and docking. The telescopic components allow the sliding cabinet to slide relative to the cabinet. Additionally, retracting the sliding cabinet into the cabinet saves transport space during cabinet transportation. When the cabinet is installed and in use, the sliding cabinet can slide outwards, avoiding obstruction of electrical equipment or wiring layout.

[0014] 2. When a fire is detected inside the cabinet, this application retracts the telescopic component, causing the sliding cabinet to slide inwards. At the end of this sliding phase, the push rod contacts the lower end of the support rod and pushes the lower end of the support rod to slide inwards. Since the upper end of the support rod is rotatably connected to the lifting plate and the lower end is rotatably connected to the sliding block, and the sliding block slides along the partition, the tilt angle of the support rod changes as the lower end slides inwards, causing the lifting plate to rise. At the end of the upward movement of the lifting plate, the support rod pushes the rotating plate upwards, causing the rotating plate to rotate around its axis of rotation. The upper end of the rotating plate squeezes the fire extinguisher handle, triggering the fire extinguisher to activate. The extinguishing medium inside the fire extinguisher box is sprayed out through the pipe from the fire extinguishing nozzle to extinguish the fire inside the cabinet. Through the mechanical linkage structure of the support rod, rotating plate, and fire extinguisher handle, the automatic activation of the fire extinguisher is achieved when a fire occurs, without relying on electronic sensors and control systems, avoiding the risk of electronic components failing in high-temperature environments, and has the advantages of fast response speed and high reliability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall installation structure of this application; Figure 2 This is a schematic diagram of the bottom mounting structure of the cabinet in this application; Figure 3 This is a schematic diagram of the sliding cabinet of this application being slidably installed inside the cabinet; Figure 4 This is a schematic diagram of the internal installation structure of the cabinet in this application; Figure 5 For the purposes of this application Figure 4A magnified schematic diagram of the structure at point A; Figure 6 This is a sectional view of the side of the cabinet in this application; Figure 7 This is a schematic diagram of the installation structure of the ventilation box and fire extinguishing box in this application; Figure 8 This is a side view of the ventilation box and fire extinguishing box of this application installed together.

[0017] The labels in the diagram represent: 1. Base; 11. First wedge; 12. Second wedge; 2. Cabinet; 21. Shelf; 211. Guide rail; 22. Ventilation box; 2201. Ventilation hole; 23. Telescopic component; 24. Baffle plate; 25. Lifting plate; 251. Support rod; 2501. Connecting hole; 252. Sliding block; 253. Support rod; 26. Elastic component; 27. Slide rod; 28. First docking block; 3. Sliding cabinet; 31. Second docking block; 3101. Second docking groove; 32. Push rod; 4. Fire extinguisher box; 41. Baffle; 42. Fire extinguishing nozzle; 43. Rotating plate; 44. Fire extinguisher handle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] The present application will be further described below with reference to embodiments.

[0020] Example: A quick-fixing and disassembly type high and low voltage switchgear, such as... Figure 1 - Figure 8 As shown, it includes a cabinet 2 and a sliding cabinet 3 that is slidably installed on one side of the opening of the cabinet 2. An extension piece 23 for driving the sliding cabinet 3 to slide is fixedly installed inside the cabinet 2. A first docking block 28 and a second docking block 31 are fixedly installed on the sides of the bottom of the cabinet 2 and the sliding cabinet 3 that are far apart from each other. Rollers are fixedly installed on the bottom of the first docking block 28 and the second docking block 31. The base 1 is used to be fixedly installed on the ground. The first wedge 11 and the second wedge 12 are fixedly installed on both sides respectively. The first wedge 11 and the second wedge 12 are used to mate with the first docking block 28 and the second docking block 31 respectively. The base 1 is provided with multiple mounting through holes. The base 1 is installed to the plane to be installed by mounting bolts. In actual use, the base 1 has multiple holes and does not need to be disassembled during disassembly, which can facilitate the installation of high and low voltage switchgear in the future. The first docking block 28 and the second docking block 31 are provided with first docking grooves and second docking grooves 3101 for the first wedge block 11 and the second wedge block 12 to be inserted into on their respective far-away end faces. Ventilation boxes 22 are embedded and fixedly installed on both sides of the cabinet 2. The ventilation boxes 22 are provided with multiple ventilation holes 2201. A baffle plate 24 is provided on the outside of the ventilation box 22, with the middle of the baffle plate 24 spaced apart from the outside of the ventilation box 22. Through the ventilation holes 2201 provided on the ventilation box 22, effective ventilation and heat dissipation inside the cabinet 2 are achieved, avoiding accelerated aging or damage of electrical components inside the high and low voltage cabinet due to excessive temperature. The baffle plate 24 can prevent rainwater, dust and other external debris from directly entering the ventilation holes 2201, while ensuring the normal ventilation function of the ventilation holes 2201, thus achieving the effect of both protection and ventilation.

[0021] In actual use, during installation, the operator first fixes the base 1 to the preset position on the ground using mounting bolts. Then, the cabinet 2 and sliding cabinet 3 are moved as a whole to the base 1. The first mating block 28 is inserted into the first mating groove. Then, by extending the telescopic component 23, the sliding cabinet 3 can be slid out, allowing the second wedge block 12 to be inserted into the second mating groove 3101 on the second mating block 31. This completes the quick and easy installation of the cabinet 2 and sliding cabinet 3 with the base 1. When disassembly is required, simply retract the telescopic component 23, causing the sliding cabinet 3 to slide into the cabinet 2. Then, the first wedge block 11 and the second wedge block 12 can be disengaged from their corresponding mating grooves, allowing the cabinet 2 and sliding cabinet 3 to be removed from the base 1 as a whole. The wedge-dating groove structure, formed by the first wedge 11 and the second wedge 12 on the base 1 engaging with the first docking block 28 and the second docking block 31 at the bottom of the cabinet 2 and the sliding cabinet 3, enables rapid installation and disassembly of the high and low voltage cabinets to the ground. This eliminates the need for traditional bolt connections, significantly improving installation and disassembly efficiency. Furthermore, the rollers allow the cabinet 2 and the sliding cabinet 3 to be moved as a whole, reducing the difficulty of handling and docking. The telescopic component 23 allows the sliding cabinet 3 to slide relative to the cabinet 2. Additionally, retracting the sliding cabinet 3 into the cabinet 2 saves transportation space during cabinet 2 transport. When the cabinet 2 is in use, the sliding cabinet 3 can slide outwards, avoiding obstruction of electrical equipment or wiring layout.

[0022] Furthermore, a lifting plate 25 is installed vertically inside the ventilation box 22. A lifting mechanism is located below the lifting plate 25 to drive its movement. The lifting plate 25 has a connecting hole 2501 that communicates with the ventilation opening 2201. When the sliding cabinet 3 is in the slid-out state, the connecting hole 2501 communicates with the ventilation opening 2201. The lifting plate 25 can move vertically inside the ventilation box 22. The lifting mechanism is located below the lifting plate 25 and is used to drive the lifting plate 25 to rise or fall. The lifting plate 25 has through holes 2501, the position and number of which correspond to the ventilation holes 2201. When the sliding cabinet 3 is in the extended state (i.e., the telescopic component 23 pushes the sliding cabinet 3 away from the cabinet 2), the lifting plate 25 is at its lowest position. At this time, the through holes 2501 and the ventilation holes 2201 are aligned and connected, forming a continuous ventilation path between the inside of the cabinet 2 and the external environment, achieving normal ventilation and heat dissipation. When the sliding cabinet 3 is in the retracted state (i.e., the telescopic component 23 pulls the sliding cabinet 3 closer to the cabinet 2), the lifting mechanism drives the lifting plate. The lifting plate 25 rises, causing the connecting through hole 2501 and the ventilation through hole 2201 to be misaligned, thus blocking the ventilation path. The opening and closing control of the ventilation through hole 2201 is realized through the lifting movement of the lifting plate 25, and this control is linked to the sliding cabinet 3's sliding out / retracting state. The ventilation channel is only opened when the sliding cabinet 3 is in the sliding out state (i.e., the high and low voltage cabinet is in normal use state), ensuring effective heat dissipation in use. When the sliding cabinet 3 is retracted, the ventilation channel is closed, which is beneficial for sealing and protecting the inside of the cabinet 2 during transportation, storage, or non-working states.

[0023] Furthermore, a partition 21 is fixedly installed inside the cabinet 2. The lifting mechanism includes a support rod 251 rotatably installed below the lifting plate 25. The lower end of the support rod 251 is inclined towards the sliding cabinet 3. A sliding block 252 is rotatably installed below the support rod 251 and is slidably installed on the partition 21. A guide rail 211 for guiding the sliding block 252 is fixedly installed on the partition 21. A push rod 32 is fixedly installed on the side of the sliding cabinet 3 facing the support rod 251. The push rod 32 is used to push the support rod 251 at the end of the sliding cabinet 3 sliding into the cabinet 2. The lower end of 51 slides towards the inside of the cabinet 2; when the telescopic component 23 drives the sliding cabinet 3 to slide into the cabinet 2, at the end of the slide, the push rod 32 contacts the lower end of the support rod 251 and pushes the lower end of the support rod 251 to slide towards the inside of the cabinet 2. Since the upper end of the support rod 251 is rotatably connected to the lifting plate 25 and the lower end is rotatably connected to the sliding block 252, and the sliding block 252 slides along the partition 21, when the lower end of the support rod 251 slides inward, the tilt angle of the support rod 251 changes, and its upper end moves upward, thereby pushing the lifting plate 25 to rise, so that the connection is open. Hole 2501 is offset from ventilation hole 2201. Conversely, when the sliding cabinet 3 slides outward from the cabinet 2, push rod 32 gradually disengages from the lower end of support rod 251, and lifting plate 25 descends and resets under the action of the reset mechanism, closing the ventilation channel. Through the cooperation of push rod 32 and support rod 251, the sliding cabinet 3's own sliding motion drives the lifting plate 25 to rise and fall, eliminating the need for an additional independent drive motor or power source. This results in a simple structure, low cost, and high reliability. Furthermore, push rod 32 only pushes support rod 251 at the end of the sliding cabinet 3's movement, ensuring the smooth operation of the sliding cabinet 3. During most of the sliding stroke, the lifting plate 25 remains at its lowest position and the ventilation channel remains open. A slide rod 27 is fixedly installed on the partition 21, and an elastic element 26 is provided on the slide rod 27. The elastic element 26 is used to drive the lifting plate 25 to return to its original position. When the push rod 32 pushes the support rod 251 to raise the lifting plate 25, the elastic element 26 is compressed and stores elastic potential energy. When the push rod 32 disengages from the lower end of the support rod 251, the elastic element 26 releases its elastic potential energy, driving the lifting plate 25 to move downward and return to its original position, so that the connecting hole 2501 is aligned with the ventilation hole 2201, and the ventilation channel is opened.

[0024] Furthermore, a fire extinguishing box 4 is fixedly installed on the top of the cabinet 2. The fire extinguishing box 4 integrates a fire extinguisher, and a fire extinguishing nozzle 42 is fixedly installed on the lower end of the fire extinguishing box 4. The fire extinguishing nozzle 42 is located on the side of the fire extinguishing box 4 near the sliding cabinet 3. By setting the fire extinguishing box 4 on the top of the cabinet 2, the high and low voltage cabinet itself has a fire extinguishing function, which can promptly extinguish the fire when a fire occurs inside the cabinet, prevent the fire from spreading, and reduce economic losses. The fire extinguishing nozzle 42 is located on the side near the sliding cabinet 3, which can focus the spray coverage on the internal space of the sliding cabinet 3.

[0025] Furthermore, the top of the lifting plate 25 passes through the ventilation box 22 and extends out. A support rod 253 is fixedly installed on the top of the lifting plate 25. A rotating plate 43 is rotatably installed on the side of the fire extinguishing box 4 away from the sliding cabinet 3. The rotating plate 43 is located directly above the support rod 253. Multiple fire extinguisher handles 44 are provided at the upper end of the rotating plate 43. At the end of the upward movement of the lifting plate 25, the support rod 253 pushes the rotating plate 43 upward, so that the rotating plate 43 squeezes the fire extinguisher handles 44, causing the fire extinguishing box 4 to spray fire extinguishing dry powder or liquid carbon dioxide from the fire extinguishing nozzle 42. When a fire is detected inside cabinet 2, the telescopic component 23 retracts, causing the sliding cabinet 3 to slide inwards towards the inside of cabinet 2. At the end of this sliding phase, the push rod 32 contacts the lower end of the support rod 251, pushing it to slide inwards towards the inside of cabinet 2. Since the upper end of the support rod 251 is rotatably connected to the lifting plate 25 and the lower end is rotatably connected to the sliding block 252, and the sliding block 252 slides along the partition 21, the tilt angle of the support rod 251 changes as the lower end slides inwards. The change causes the lifting plate 25 to rise. At the end of the upward movement of the lifting plate 25, the support rod 253 pushes the rotating plate 43 upward. The rotating plate 43 rotates around its axis of rotation, and the upper end of the rotating plate 43 squeezes the fire extinguisher handle 44, triggering the fire extinguisher to activate. The extinguishing medium inside the fire extinguishing box 4 is then sprayed out through the pipe from the fire extinguishing nozzle 42 to extinguish the fire inside the cabinet. Through the mechanical linkage structure of the support rod 253, the rotating plate 43, and the fire extinguisher handle 44, the automatic activation of the fire extinguisher is achieved when a fire occurs, without relying on electronic sensors and controls. The control system avoids the risk of electronic components failing in high-temperature environments and has the advantages of fast response and high reliability. At the same time, the triggering mechanism is linked with the lifting movement of the lifting plate 25, with a compact structure and ingenious design. In addition, the telescopic component 23 can be an electric push rod in actual use. A battery with separate power supply for the electric push rod is set at the bottom of the cabinet 2, and the power supply line of the battery is separated from other lines inside the cabinet 2, so as to ensure that the telescopic component 23 can be driven independently in the event of a fire inside the cabinet 2.

[0026] It should be noted that a fire alarm is installed inside cabinet 2. When the fire alarm is triggered, it will directly drive the telescopic component 23 to retract, quickly extinguishing the fire inside cabinet 2.

[0027] Furthermore, a U-shaped baffle 41 is provided below the fire extinguisher box 4, and a rotating plate 43 is rotatably installed inside the baffle 41. A torsion spring is provided on the rotating plate 43, which is used to drive the rotating plate 43 to rotate downward on the side away from the sliding cabinet 3. A limiting protrusion is fixedly installed on the inner wall of the baffle 41 to limit the downward rotation angle of the rotating plate 43. The torsion spring realizes the automatic reset of the rotating plate 43, ensuring that the rotating plate 43 can return to the initial position in time after the fire extinguishing action is completed, avoiding the fire extinguisher handle 44 being accidentally touched for a long time. The setting of the limiting protrusion precisely limits the reset angle of the rotating plate 43, ensuring that the rotating plate 43 can accurately return to the preset initial position every time, improving the reliability and consistency of the mechanism action.

[0028] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this application.

Claims

1. A quick-fixing and disassembly type high and low voltage switchgear, characterized in that, include: The cabinet (2) and the sliding cabinet (3) are slidably installed on one side of the opening of the cabinet (2). The cabinet (2) is fixedly installed with a telescopic component (23) for driving the sliding cabinet (3) to slide. The bottom of the cabinet (2) and the sliding cabinet (3) are respectively fixedly installed with a first docking block (28) and a second docking block (31) on the side away from each other. The bottom of the first docking block (28) and the second docking block (31) are both fixedly installed with rollers. The base (1) is used to be fixedly installed on the ground. The first wedge (11) and the second wedge (12) are fixedly installed on both sides respectively. The first wedge (11) and the second wedge (12) are used to dock with the first docking block (28) and the second docking block (31) respectively. Among them, the end faces of the first docking block (28) and the second docking block (31) that are far apart from each other are provided with a first docking groove and a second docking groove (3101) for the first wedge block (11) and the second wedge block (12) to be inserted.

2. The quick-fixing and disassembly type high and low voltage switchgear according to claim 1, characterized in that, Both sides of the cabinet (2) are embedded and fixedly installed with ventilation boxes (22). The ventilation boxes (22) are provided with multiple ventilation holes (2201). A shielding plate (24) is provided on the outside of the ventilation box (22). The middle part of the shielding plate (24) is spaced apart from the outside of the ventilation box (22).

3. A quick-fixing and disassembly type high and low voltage switchgear according to claim 2, characterized in that, The ventilation box (22) is equipped with a lifting plate (25) that moves up and down inside. A lifting mechanism for moving the lifting plate (25) up and down is provided below the lifting plate (25). The lifting plate (25) is provided with a connecting hole (2501) that is connected to the ventilation hole (2201). When the sliding cabinet (3) is in the sliding state, the connecting hole (2501) is connected to the ventilation hole (2201).

4. A quick-fixing and disassembly type high and low voltage switchgear according to claim 3, characterized in that, The cabinet (2) is fixedly installed with a partition (21). The lifting mechanism includes a support rod (251) rotatably installed below the lifting plate (25). The lower end of the support rod (251) is inclined toward the sliding cabinet (3). A sliding block (252) is rotatably installed below the support rod (251). The sliding block (252) is slidably installed on the partition (21). A push rod (32) is fixedly installed on the side of the sliding cabinet (3) facing the support rod (251). The push rod (32) is used to push the lower end of the support rod (251) toward the inside of the cabinet (2) at the end of the sliding cabinet (3) sliding toward the inside of the cabinet (2).

5. A quick-fixing and disassembly type high and low voltage switchgear according to claim 4, characterized in that, A slide rod (27) is fixedly installed on the partition (21), and an elastic element (26) is provided on the slide rod (27). The elastic element (26) is used to drive the lifting plate (25) to reset downward.

6. A quick-fixing and disassembly type high and low voltage switchgear according to claim 5, characterized in that, A fire extinguishing box (4) is also fixedly installed on the top of the cabinet (2). A fire extinguisher is integrated inside the fire extinguishing box (4). A fire extinguishing nozzle (42) is fixedly installed on the lower end face of the fire extinguishing box (4). The fire extinguishing nozzle (42) is located on the side of the fire extinguishing box (4) close to the sliding cabinet (3).

7. A quick-fixing and disassembly type high and low voltage switchgear according to claim 6, characterized in that, The top of the lifting plate (25) passes through the ventilation box (22) and extends out. A support rod (253) is fixedly installed on the top of the lifting plate (25). A rotating plate (43) is rotatably installed on the side of the fire extinguishing box (4) away from the sliding cabinet (3). The rotating plate (43) is located directly above the support rod (253). Multiple fire extinguisher handles (44) are provided at the upper end of the rotating plate (43). At the end of the upward movement of the lifting plate (25), the support rod (253) pushes the rotating plate (43) upward, so that the rotating plate (43) squeezes the fire extinguisher handles (44), causing the fire extinguishing box (4) to spray fire extinguishing dry powder or liquid carbon dioxide from the fire extinguishing nozzle.

8. A quick-fixing and disassembly type high and low voltage switchgear according to claim 7, characterized in that, A U-shaped baffle (41) is provided below the fire extinguishing box (4). The rotating plate (43) is rotatably installed inside the baffle (41). A torsion spring is provided on the rotating plate (43). The torsion spring is used to drive the rotating plate (43) to rotate downward away from the side of the sliding cabinet (3). A limiting protrusion for limiting the downward rotation angle of the rotating plate (43) is fixedly installed on the inner wall of the baffle (41).

9. A quick-fixing and disassembly type high and low voltage switchgear according to claim 1, characterized in that, The base (1) is provided with multiple mounting through holes, and the base (1) is installed to the surface to be installed by mounting bolts.

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