Modular combined draw-out switchgear cabinet structure

Abstract

This invention discloses a modularly combined withdrawable switchgear cabinet structure, relating to the field of switchgear technology, comprising: an incoming line cabinet for receiving and distributing external power; a feeder cabinet installed on one side of the incoming line cabinet and connected to it, for distributing and transmitting power to downstream electrical equipment or power distribution lines; and multiple drawer cabinets. During operation, when the drawer cabinet is pulled out, the handle causes the rollers to slide outward along the groove on the inner wall of the feeder cabinet. Simultaneously, the hook drives the connecting shaft to move. Gears at both ends of the connecting shaft mesh with a rack, forcing the drawer cabinet to move synchronously on both sides, preventing lateral swaying during the extraction process. After the gears enter the limiting groove, they drive the rack and connecting block to slide along the fixed rod hole groove, allowing the drawer cabinet to be completely removed. The hook engages with the connecting shaft to suspend it, preventing instantaneous sinking and falling. It can be disassembled by lifting it up.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, specifically to a modularly assembled withdrawable switchgear cabinet structure. Background Technology

[0002] In power distribution systems, withdrawable switchgear is an important type of power distribution equipment, widely used in industry, construction, and infrastructure for the reception, distribution, control, and protection of electrical energy. A typical withdrawable switchgear consists of an incoming line cabinet, a feeder cabinet, and withdrawable functional units (drawer cabinets).

[0003] However, existing withdrawable switchgear has the following technical drawbacks in practical applications: Existing pull-out switchgear typically uses a simple roller and guide rail structure to achieve the pull-out function. Due to the lack of an effective synchronous guiding mechanism on both sides of the drawer, uneven force or improper operation during the pull-out process can easily lead to asynchronous movement on both sides, causing the drawer to sway, tilt, or even jam. This unstable pull-out action not only affects the user experience but also causes misalignment between the conductive mechanism inside the drawer and the cabinet's busbar system, increasing wear on the connections and potentially leading to safety hazards such as poor contact and arc discharge. Furthermore, when the drawer is fully extended, the lack of an effective suspension or support structure makes the front end prone to sudden sag due to gravity, causing the drawer to fall or tip over, endangering operator safety and equipment integrity. During switchgear operation, abnormal temperature rises may occur in the busbar copper busbars and conductive parts due to overload, poor contact, or short circuits. Existing withdrawable switchgear mostly relies on external temperature monitoring devices or manual inspections to detect overheating faults, lacking built-in automatic overheat protection. When the temperature rises abnormally, the circuit cannot be cut off in time, easily leading to insulation aging, equipment burnout, or even fire accidents, posing a significant safety risk. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a modularly assembled withdrawable switch cabinet structure, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a modularly assembled withdrawable switch cabinet structure, comprising: An incoming line cabinet, which is used to receive and distribute external power. A power distribution cabinet is installed on one side of the incoming line cabinet and connected to the incoming line cabinet. It is used to distribute and transmit electrical energy to downstream electrical equipment or power distribution lines. The drawer cabinet, with multiple sets, is installed inside the power supply cabinet to install circuit breakers and contactor components, enabling branch control, protection, and maintenance isolation; A switch handle is installed on the surface of the drawer cabinet for manually operating the circuit breaker inside the drawer cabinet. A pull handle is provided below it for pulling out the drawer cabinet. Rollers are installed on both sides of the drawer cabinet and are rotatably connected to both sides of the drawer cabinet. The rollers are also slidably connected to the grooves on the inner wall of the power supply cabinet. A guiding mechanism, connected to the drawer cabinet, is used to guide the drawers when they are pulled out. A locking mechanism is installed at one end of the drawer cabinet and connected to the guide mechanism for positioning the drawer cabinet. A conductive mechanism is installed inside the power supply cabinet and electrically connected to the inside of the drawer cabinet for power connection inside the drawer cabinet.

[0006] Preferably, the guiding mechanism includes a limiting component and a synchronizing component. The limiting component is located on both sides of the drawer cabinet and is installed on the inner wall of the power supply cabinet. The limiting component is used to limit the synchronizing component, and the synchronizing component is connected to the limiting component. The synchronizing component is used for synchronizing the pulling and unpulling of both sides of the drawer cabinet. This preferred solution, by setting a guiding mechanism with a limiting component and a synchronizing component on both sides of the drawer cabinet, uses the limiting component to limit and constrain the synchronizing component, enabling the synchronizing component to force the mechanical synchronization of the pulling and unpulling action of both sides of the drawer cabinet. This effectively solves the problems of asynchronous movement, left and right swinging, and tilting and jamming caused by uneven force on both sides or improper operation of the drawer cabinet in the prior art. It ensures the stability and accurate alignment of the drawer cabinet during the pulling out and pushing in process, and avoids safety hazards such as inaccurate alignment of the conductive mechanism and the busbar system, increased wear of the plug-in, and poor contact caused by positional deviation. At the same time, the double-sided synchronous guiding mechanism significantly improves the structural stability of the drawer cabinet after it is pulled out, and prevents the risk of the drawer cabinet tilting or falling off due to force on one side, providing operators with a safer and more reliable equipment operating environment.

[0007] Preferably, the limiting component includes a fixing rod, which is fixedly installed on the inner wall of the power supply cabinet by screws. The fixing rod has a groove inside, which is strip-shaped. The groove inside the fixing rod is slidably connected to one side of the bottom of the connecting block. One side of the bottom of the connecting block has a protruding structure, and one side of the top of the connecting block has a rack. The rack and the connecting block are fixedly connected by screws. This preferred solution uses a limiting component structure with a sliding fit between the fixing rod and the connecting block. By utilizing the sliding connection between the strip-shaped groove inside the fixing rod and the protruding structure at the bottom of the connecting block, a stable and reliable linear motion guide and limiting constraint are provided for the rack. This effectively solves the problem of left and right swaying, deflection and jamming caused by the lack of rigid guide support during the drawer cabinet pull-out process in the prior art. It ensures the trajectory accuracy and structural stability of the synchronous components on both sides of the drawer cabinet during the movement process and avoids the alignment deviation of the conductive mechanism and the wear of the plug-in due to unstable guidance.

[0008] Preferably, the synchronization component includes a limiting groove and a gear. The limiting groove is installed at one end of the rack and has a U-shaped structure. The gear meshes with the rack and is installed at both ends of the connecting shaft. The connecting shaft is engaged with a hook and the hook is fixedly connected to one side of the drawer cabinet. The hook surface is provided with a U-shaped groove, and the U-shaped groove on the hook surface slides in contact with the surface of the connecting shaft. At the same time, through the engaging connection between the connecting shaft and the hook and the sliding contact design of the U-shaped groove, a reliable suspension support structure is formed after the drawer cabinet is fully pulled out, preventing the risk of the drawer cabinet falling or overturning due to the instantaneous sinking caused by gravity. In addition, the U-shaped limiting groove can provide limiting constraint and stroke extension function at the end of the gear movement, so that the drawer cabinet can be completely moved out of the power supply cabinet and maintain a stable suspension state.

[0009] Preferably, the locking mechanism includes a fixed plate, which is fixedly connected to the inner wall of the power supply cabinet by screws. A slide rod is provided inside the fixed plate, and one end of the slide rod is fixedly connected to a locking block. A spring is fitted on the outside of the slide rod. The locking block is located above the connecting shaft, and the surface of the locking block slides in contact with the connecting shaft. This preferred solution uses a locking mechanism structure consisting of a fixed plate, a slide rod, a spring, and a locking block. By utilizing the sliding connection between the slide rod and the fixed plate, as well as the elastic reset effect of the spring, the locking block can elastically limit and automatically position the connecting shaft. This effectively solves the problem of loose connection and poor contact caused by the lack of a reliable positioning mechanism after the drawer cabinet is pushed in in the prior art. It ensures that the drawer cabinet can automatically lock into place and achieve precise positioning at the end of the push-in process, avoiding misalignment of the conductive mechanism and wear of the plug-in due to positional deviation. At the same time, through the sliding contact design between the locking block and the connecting shaft, the inclined guide effect is used to realize the automatic lifting and reset of the locking block during the push-in process of the drawer cabinet. Locking can be completed without additional operation, which significantly improves the convenience and reliability of the drawer cabinet operation.

[0010] Preferably, multiple slide rods are provided, and the multiple slide rods are distributed in a straight line with equal spacing. The outer wall of the slide rod is slidably connected to the inside of the fixed plate. One end of the bottom of the slide rod is provided with a protruding structure, and both ends of the locking block are provided with protruding structures. The two sides of the protruding structures at both ends of the locking block are sloped. By adopting a structural design with multiple slide rods distributed in a straight line with equal spacing, the stability and force uniformity of the locking block movement are significantly improved, effectively avoiding the problem of locking block skewing or jamming caused by single-point support. This ensures the reliability and durability of the locking mechanism during repeated operation. At the same time, the sliding cooperation between the protruding structure at the bottom of the slide rod and the fixed plate achieves precise limiting of the lifting stroke of the locking block, preventing the risk of excessive spring compression or locking block falling off. The design of the sloped protruding structure at both ends of the locking block allows the connecting shaft to form a smooth guiding contact with the slope during pushing in and pulling out. The slope automatically drives the locking block to lift or reset, realizing automatic locking and positioning when the drawer is pushed in and smooth unlocking when it is pulled out.

[0011] Preferably, the conductive mechanism includes a busbar copper bus, which is installed inside the power supply cabinet, and one top end of the busbar copper bus is fixedly connected to the inside of the power supply cabinet by bolts. The busbar copper bus is electrically connected to the inside of the incoming line cabinet. The busbar copper bus is in contact with the surface of the busbar docking groove, which is installed on the surface of the drawer cabinet. Bimetallic strips are evenly distributed from top to bottom on the outside of the busbar copper bus, and the bimetallic strips are installed on the surface of the internal support of the power supply cabinet by fixing screws. This preferred solution utilizes the bimetallic strips evenly distributed on the outside of the busbar copper bus to conduct electricity. The thermosensitive properties of the bimetallic strip enable real-time monitoring and overheat protection of the busbar copper busbar temperature. This effectively solves the problem that existing switchgear lacks built-in automatic overheat protection and relies on external monitoring or manual inspection, resulting in the inability to promptly address abnormal temperatures. When the busbar copper busbar experiences an abnormal temperature rise due to overload, poor contact, or short circuit, the bimetallic strip can quickly sense the heat and deform, promptly cutting off or disconnecting the circuit connection. This avoids insulation aging, equipment burnout, or even fire accidents caused by excessive temperature, significantly improving the safety and reliability of the switchgear operation.

[0012] Preferably, the top end of the busbar copper bus is corrugated, the surface of the busbar copper bus is bonded to a bimetallic strip, and one side surface of the bimetallic strip has heat-conducting fins distributed in a straight line at equal intervals from top to bottom. The heat-conducting fins are bonded to both sides of the busbar copper bus, and the contact surfaces of the heat-conducting fins, the bimetallic strip, and the busbar copper bus are provided with an insulating coating. This preferred solution, by adopting a corrugated top design for the busbar copper bus, effectively increases the heat dissipation surface area and the deformation compensation capability for thermal expansion and contraction of the busbar copper bus, avoiding mechanical deformation or poor contact problems caused by thermal stress due to temperature changes. At the same time, the bonding design of the heat-conducting fins to both sides of the busbar copper bus significantly improves the heat conduction efficiency and thermal response speed of heat transfer from the busbar copper bus to the bimetallic strip, ensuring that the bimetallic strip can promptly and accurately sense temperature changes and trigger protection actions, solving the problems of delayed overheat protection response and insensitive temperature monitoring in the prior art.

[0013] This invention provides a modular, modular withdrawable switch cabinet structure. It offers the following advantages: In operation, the modular, pull-out switch cabinet structure allows the drawer to slide outward along the groove on the inner wall of the power supply cabinet via a handle. Simultaneously, the hook moves the connecting shaft, and the gears and racks at both ends of the connecting shaft engage to force the drawer to move synchronously on both sides, preventing lateral swaying during the extraction process. After the gears enter the limit groove, they drive the rack and connecting block to slide along the fixed rod hole groove, allowing the drawer to be completely removed. The hook engages with the connecting shaft to suspend it and prevent it from falling instantly. It can be disassembled by lifting it up. During reset, the hook is embedded in the connecting shaft, and the rack and limit groove constrain the gear trajectory to ensure smooth and precise pushing. The fixed rod and connecting block work together to suppress shaking. When pushed to the end, the connecting shaft contacts the slope of the locking block, raising the locking block and compressing the spring. The spring then resets, driving the other slope of the locking block to force the connecting shaft to move backward, allowing the drawer to automatically lock in place. When the busbar copper busbar overheats, the heat is transferred to the bimetallic strip through the heat-conducting fins. The bimetallic strip bends under heat, pushing the busbar copper busbar away from the busbar docking groove, automatically cutting off the circuit to achieve overheat protection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the drawer cabinet structure of the present invention; Figure 4 This is a schematic diagram of the guiding mechanism structure of the present invention; Figure 5 This is a schematic diagram of the busbar docking groove structure of the present invention; Figure 6 This is a schematic diagram of the locking mechanism of the present invention; Figure 7 This is a schematic diagram of the limiting groove structure of the present invention; Figure 8 This is a schematic diagram of the conductive mechanism structure of the present invention; Figure 9 This is a schematic diagram of the heat-conducting fin structure of the present invention.

[0015] In the diagram, 1. Incoming line cabinet; 2. Feeder cabinet; 3. Drawer cabinet; 4. Switch handle; 5. Handle; 6. Roller; 7. Guide mechanism; 701. Fixing rod; 702. Connecting block; 703. Limiting groove; 704. Rack; 705. Gear; 706. Hook; 707. Connecting shaft; 8. Engaging mechanism; 801. Fixing plate; 802. Spring; 803. Locking block; 804. Slide rod; 9. Conductive mechanism; 901. Bimetallic strip; 902. Heat-conducting fin; 903. Fixing screw; 904. Busbar copper busbar; 905. Busbar docking groove. Detailed Implementation

[0016] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figure 1-5 This invention provides a technical solution: a modular combination of withdrawable switch cabinet structures, comprising: an incoming line cabinet 1 for receiving and distributing external power; a feeder cabinet 2 installed on one side of the incoming line cabinet 1 and connected to it, for distributing and transmitting power to downstream electrical equipment or distribution lines; multiple drawer cabinets 3 installed inside the feeder cabinet 2 for installing circuit breakers and contactor components to achieve branch control, protection, and maintenance isolation; a switch handle 4 installed on the surface of the drawer cabinet 3 for manually operating the circuit breakers inside the drawer cabinet 3, with a pull handle 5 below it for pulling out the drawer cabinet 3; rollers 6 installed on both sides of the drawer cabinet 3 and rotatably connected to both sides of the drawer cabinet 3, and the rollers 6 slidably connected to the grooves on the inner wall of the feeder cabinet 2; and a guide mechanism 7 connected to the drawer cabinet 3 for guiding the drawer cabinet 3 when it is pulled out. This embodiment achieves system integration of power reception, distribution, and branch control by modularly combining the incoming line cabinet 1, the power supply cabinet 2, and the drawer cabinet 3. The drawer cabinet 3 adopts a pull-out structure with rollers 6 slidingly engaging with the grooves on the inner wall of the cabinet, allowing the drawer cabinet 3 to be easily pulled out via the handle 5. This effectively solves the problems of left and right swaying, tilting, and jamming caused by the lack of effective guidance during the pull-out process of the drawer cabinet 3 in the prior art, ensuring the movement stability of the drawer cabinet 3 during the pull-out and push-in processes, and avoiding misalignment of the conductive mechanism 9 and wear of the plug-in due to positional deviation. At the same time, through the connection and cooperation of the guide mechanism 7 with the drawer cabinet 3, an effective suspension support is provided after the drawer cabinet 3 is fully pulled out, preventing the risk of the drawer cabinet 3 falling or overturning due to instantaneous sinking under gravity. This significantly improves operational safety and equipment reliability, and ensures the personal safety of operators and the integrity of the equipment.

[0018] Example 2: Please refer to Figure 1-9This invention provides a technical solution: a locking mechanism 8, installed at one end of the drawer cabinet 3 and connected to the guide mechanism 7, for positioning the drawer cabinet 3; a conductive mechanism 9, installed inside the power supply cabinet 2 and electrically connected to the inside of the drawer cabinet 3, for power connection inside the drawer cabinet 3; the guide mechanism 7 includes a limiting component and a synchronization component, the limiting components are located on both sides of the drawer cabinet 3 and are installed on the inner wall of the power supply cabinet 2, the limiting components are used to limit the synchronization component, the synchronization component is connected to the limiting component, and the synchronization component is used for synchronous pulling out of both sides of the drawer cabinet 3; The positioning component includes a fixing rod 701, which is fixedly installed on the inner wall of the power supply cabinet 2 by screws. The fixing rod 701 has a groove inside, which is strip-shaped. The groove inside the fixing rod 701 is slidably connected to one side of the bottom of the connecting block 702. One side of the bottom of the connecting block 702 has a protruding structure, and one side of the top of the connecting block 702 has a rack 704. The rack 704 and the connecting block 702 are fixedly connected to each other by screws. The synchronization component includes a limiting groove 703 and a gear 705. The limiting groove 703 is installed on the gear. At one end of the rack 704, the limiting groove 703 has a U-shaped structure. The gear 705 meshes with the rack 704. The gear 705 is installed at both ends of the connecting shaft 707. The connecting shaft 707 is engaged with the hook 706. The hook 706 is fixedly connected to one side of the drawer cabinet 3. The surface of the hook 706 is provided with a U-shaped groove, and the U-shaped groove on the surface of the hook 706 slides in contact with the surface of the connecting shaft 707. The engaging mechanism 8 includes a fixing plate 801, which is fixedly connected to the inner wall of the power supply cabinet 2 by screws. A slide rod 8 is provided inside the fixing plate 801. 04. One end of the slide rod 804 is fixedly connected to the locking block 803. A spring 802 is fitted on the outside of the slide rod 804. The locking block 803 is located above the connecting shaft 707, and the surface of the locking block 803 is in sliding contact with the connecting shaft 707. Multiple slide rods 804 are provided, and the multiple slide rods 804 are distributed in a straight line with equal spacing. The outer wall of the slide rod 804 is slidably connected to the inside of the fixing plate 801. One end of the bottom of the slide rod 804 is provided with a protruding structure. Both ends of the locking block 803 are provided with protruding structures. The two sides of the protruding structures at both ends of the locking block 803 are sloped. In this embodiment, when the drawer cabinet 3 is pulled out, it is pulled outward by the handle 5, and then the two sides of the drawer cabinet 3 slide outward from the inside of the power supply cabinet 2 via the rollers 6. At the same time as the drawer cabinet 3 is pulled outward, the hook 706 drives the connecting shaft 707 to move. The movement of the connecting shaft 707 can drive the gears 705 at both ends to rotate synchronously. The gears 705 mesh with the rack 704, thereby making the two ends of the drawer cabinet 3 move synchronously, which helps to avoid the drawer cabinet 3 swinging left and right after being pulled out, thereby increasing the stability of the drawer cabinet 3 when it is pulled out. As drawer 3 is pulled out, gear 705 moves into limiting groove 703. Gear 705 then drives limiting groove 703 and rack 704 to move outward. Rack 704 then drives connecting block 702 to slide in the hole groove inside fixing rod 701, allowing drawer 3 to be completely removed from power supply cabinet 2. Due to the connection between hook 706 and connecting shaft 707, drawer 3 will not fall due to sudden weight drop when pulled out. By lifting, hook 706 can be disengaged from connecting shaft 707, allowing drawer 3 to be removed.

[0019] Furthermore, when the drawer cabinet 3 is reset, the hook 706 re-embeds into the connecting shaft 707, and the rack 704 and the limiting groove 703 constrain the movement trajectory of the gear 705, ensuring a smooth and precise alignment during the pushing process. The sliding fit between the fixing rod 701 and the connecting block 702 further suppresses shaking and improves the reliability of the insertion. When the drawer cabinet 3 is pushed to the end, the connecting shaft 707 will contact the locking block 803. Through the contact between the connecting shaft 707 and the slope of the locking block 803, the locking block 803 is forced to move upward, thereby allowing the locking block 803 to compress the spring 802 upward, so that the connecting shaft 707 can pass under the locking block 803. After the locking block 803 passes under the connecting shaft 707, the spring 802 presses the locking block 803 downward to reset, thereby allowing the locking block 803 to force the connecting shaft 707 to move backward through the slope on the other side, so that the connecting shaft 707 drives the drawer cabinet 3 to move into place.

[0020] Example 3: Please refer to Figure 3-9 This invention provides a technical solution: the conductive mechanism 9 includes a busbar copper bus 904, which is installed inside the power supply cabinet 2. One top end of the busbar copper bus 904 is fixedly connected to the inside of the power supply cabinet 2 by bolts. The busbar copper bus 904 is electrically connected to the inside of the incoming line cabinet 1. The busbar copper bus 904 is in contact with the surface of the busbar docking groove 905, which is installed on the surface of the drawer cabinet 3. Bimetallic strips 90 are evenly distributed from top to bottom on the outside of the busbar copper bus 904. 1. The bimetallic strip 901 is installed on the surface of the internal support of the power supply cabinet 2 by fixing screws 903; the top end of the busbar copper bus 904 has a corrugated structure, the surface of the busbar copper bus 904 is attached to the bimetallic strip 901, and one side of the surface of the bimetallic strip 901 has heat-conducting fins 902 distributed in a straight line at equal intervals from top to bottom. The heat-conducting fins 902 are attached to both sides of the busbar copper bus 904, and the contact surfaces of the heat-conducting fins 902 and the bimetallic strip 901 with the surface of the busbar copper bus 904 are provided with an insulating coating. In this embodiment, when the temperature of the busbar copper bus 904 is too high, the busbar copper bus 904 will transfer heat to the heat-conducting fins 902, and then the heat-conducting fins 902 will transfer heat to the bimetallic strip 901, causing the bimetallic strip 901 to bend due to heat. When the bimetallic strip 901 is bent due to heat, it will push open one side of the busbar copper bus 904, thereby allowing the busbar copper bus 904 to detach from the contact with the busbar docking groove 905, thus protecting the inside of the equipment and preventing the circuit from being damaged by excessive temperature.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A modularly assembled withdrawable switch cabinet structure, characterized in that, include: The incoming line cabinet (1) is used to receive and distribute external power. Feeder cabinet (2), which is installed on one side of incoming line cabinet (1) and connected to incoming line cabinet (1), is used to distribute and transmit electrical energy to downstream electrical equipment or power distribution lines; Drawer cabinet (3) is provided in multiple sets and installed inside the power supply cabinet (2) for installing circuit breakers and contactor components to realize branch control, protection and maintenance isolation; A switch handle (4) is installed on the surface of the drawer cabinet (3) for manually operating the circuit breaker inside the drawer cabinet (3). A handle (5) is provided below it for pulling out the drawer cabinet (3). Rollers (6) are installed on both sides of the drawer cabinet (3) and are rotatably connected to both sides of the drawer cabinet (3). The rollers (6) are slidably connected to the grooves on the inner wall of the power supply cabinet (2). The guide mechanism (7) is connected to the drawer cabinet (3) and is used to guide the drawer cabinet (3) when it is pulled out. The locking mechanism (8) is installed at one end of the drawer cabinet (3) and connected to the guide mechanism (7) for positioning the drawer cabinet (3); The conductive mechanism (9) is installed inside the power supply cabinet (2) and electrically connected to the inside of the drawer cabinet (3) for power connection inside the drawer cabinet (3).

2. The modular combination withdrawable switch cabinet structure according to claim 1, characterized in that: The guiding mechanism (7) includes a limiting component and a synchronization component. The limiting component is located on both sides of the drawer cabinet (3) and is installed on the inner wall of the power supply cabinet (2). The limiting component is used to limit the synchronization component. The synchronization component is connected to the limiting component. The synchronization component is used to synchronize the pulling of the drawer cabinet (3) on both sides.

3. The modular combination withdrawable switch cabinet structure according to claim 2, characterized in that: The limiting component includes a fixing rod (701), which is fixedly installed on the inner wall of the power supply cabinet (2) by screws. The fixing rod (701) has a slot inside, which is strip-shaped. The slot inside the fixing rod (701) is slidably connected to the bottom side of the connecting block (702). The bottom side of the connecting block (702) has a protruding structure, and the top side of the connecting block (702) has a rack (704). The rack (704) and the connecting block (702) are fixedly connected to each other by screws.

4. The modular combination withdrawable switch cabinet structure according to claim 3, characterized in that: The synchronization component includes a limiting groove (703) and a gear (705). The limiting groove (703) is installed at one end of the rack (704) and has a U-shaped structure. The gear (705) meshes with the rack (704) and is installed at both ends of the connecting shaft (707). The connecting shaft (707) is engaged with the hook (706). The hook (706) is fixedly connected to one side of the drawer cabinet (3). The surface of the hook (706) is provided with a U-shaped groove, and the U-shaped groove on the surface of the hook (706) slides in contact with the surface of the connecting shaft (707).

5. The modular combination withdrawable switch cabinet structure according to claim 4, characterized in that: The locking mechanism (8) includes a fixing plate (801), which is fixedly connected to the inner wall of the power supply cabinet (2) by screws. A slide rod (804) is provided inside the fixing plate (801). One end of the slide rod (804) is fixedly connected to the locking block (803). A spring (802) is fitted on the outside of the slide rod (804). The locking block (803) is located above the connecting shaft (707), and the surface of the locking block (803) is in sliding contact with the connecting shaft (707).

6. The modular combination withdrawable switch cabinet structure according to claim 5, characterized in that: Multiple slide rods (804) are provided, and the multiple slide rods (804) are distributed in a straight line with equal spacing. The outer wall of the slide rod (804) is slidably connected to the inside of the fixing plate (801). One end of the bottom of the slide rod (804) is provided with a protruding structure. Both ends of the locking block (803) are provided with protruding structures. The two sides of the protruding structures at both ends of the locking block (803) are sloped.

7. The modular combination withdrawable switch cabinet structure according to claim 6, characterized in that: The conductive mechanism (9) includes a busbar copper bus (904), which is installed inside the power supply cabinet (2). One end of the top of the busbar copper bus (904) is fixedly connected to the inside of the power supply cabinet (2) by bolts. The busbar copper bus (904) is electrically connected to the inside of the incoming line cabinet (1). The busbar copper bus (904) is in contact with the surface of the busbar docking groove (905). The busbar docking groove (905) is installed on the surface of the drawer cabinet (3). Bimetallic strips (901) are distributed at equal intervals from top to bottom on the outside of the busbar copper bus (904). The bimetallic strips (901) are installed on the surface of the internal support of the power supply cabinet (2) by fixing screws (903).

8. The modular combination withdrawable switch cabinet structure according to claim 7, characterized in that: The top end of the busbar copper bus (904) has a corrugated structure. The surface of the busbar copper bus (904) is attached to the bimetallic strip (901). One side surface of the bimetallic strip (901) has heat-conducting fins (902) distributed in a straight line at equal intervals from top to bottom. The heat-conducting fins (902) are attached to both sides of the busbar copper bus (904). The contact surfaces of the heat-conducting fins (902) and the bimetallic strip (901) with the surface of the busbar copper bus (904) are provided with an insulating coating.

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