A withdrawable switchgear interlock and switchgear

Abstract

This invention discloses a pull-out switchgear interlock and switchgear, relating to the field of electrical equipment technology. The invention includes a cabinet with several parallel support bars fixed at equal intervals on both sides of the inner wall. A limit plate is fixed at the front of the support bars of the same height. Insulating sleeves are symmetrically and continuously fixed above the rear sides of the cabinet above two support bars of the same height. A drawer body is movably connected to the outer sides of two insulating sleeves of the same height. A connecting plate is fixed to the front end of each pivot, and a fixing shell is fixed to the front side of the connecting plate. A fixing block is fixed to the outer side of the conductive post at the rear of the inner wall of each drawer body. A through-hole is formed on one side of each fixing block. An insulating locking plate is movably connected to the through-holes in two fixing blocks within the same drawer body. Connecting rod one and connecting rod two are fixed to the bottom of the insulating locking plate near the fixing shell. The advantages of this invention are: during operation, unlocking and pulling out the drawer body can be performed with double power disconnection, making the operation safer.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment technology, and in particular relates to a withdrawable switchgear interlock and switchgear. Background Technology

[0002] Withdrawable switchgear is a common type of electrical equipment, mainly used for the control and protection of power systems. The cabinet is typically made of high-quality cold-rolled steel or aluminum-zinc coated steel, processed and bent using CNC equipment, and then powder-coated. It boasts high strength and a high protection rating. The drawer unit is the core component of the withdrawable switchgear, featuring a reliable mechanical interlocking device to prevent the switch from being pulled out under load while energized, thus improving safety. The drawer's operating mechanism enables functions such as opening, closing, testing, withdrawal, and isolation. A padlock can be added after the operating handle is positioned. The horizontal busbar is located in the horizontal busbar isolation chamber of the switchgear and can be placed at the rear or top of the cabinet. The distribution busbars (vertical busbars) are assembled in flame-retardant plastic functional panels and connected to the main busbars via connectors.

[0003] Switchgear interlocking structures are primarily used to prevent misoperation and ensure equipment and personnel safety. They are commonly found in high-voltage switchgear and other power equipment, utilizing lever rotation to control the movement of the locking bolt. For example, in the interlock between a grounding switch and a circuit breaker, when the grounding switch closes, the lever mechanism locks the circuit breaker's closing locking bolt, preventing the circuit breaker from closing. Gear rotation controls the movement of the locking bolt. Another example is the interlock between a circuit breaker trolley and its cabinet; when the circuit breaker closes, the relevant gears drive the locking bolt gears, causing the locking bolt to lock onto the trolley's chassis guide rails, preventing the trolley from moving.

[0004] Meanwhile, a search of existing public documents revealed a patent document with publication number CN119518463B, which discloses a multifunctional withdrawable low-voltage switchgear, relating to the field of low-voltage switchgear technology. This device includes eight interconnected instrument compartments, a digital detection module compartment, a transformer power inlet compartment, a dual-channel distribution bus compartment, a connecting bus outlet compartment, a module unit compartment, a feeder cable compartment, and an emergency backup cable compartment. It employs a phase-separated management and layered current interruption protection distribution method, enabling maintenance personnel to quickly locate the faulty circuit and fault current characteristics, split the faulty circuit, and replace damaged components, making the maintenance process efficient and convenient, and shortening equipment downtime. However, it still has the following drawbacks in practical use:

[0005] During the operation of the aforementioned withdrawable switchgear, a locking structure is required for locking. After unlocking, the corresponding structure is opened. During operation, if the power inside the cabinet is not completely cut off when the lock is opened, safety hazards may easily arise as work continues. Furthermore, power is cut off by a single switch, requiring operators to perform additional power cuts, which is not safe enough. Summary of the Invention

[0006] The purpose of this invention is to provide a withdrawable switchgear interlock and switchgear, which solves the problem that the withdrawable switchgear interlock and switchgear require manual power disconnection during power failure, resulting in insufficient operational safety.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0008] This invention relates to a withdrawable switchgear interlock and switchgear, comprising a cabinet. Both sides of the inner wall of the cabinet are fixed with several parallel support bars at equal intervals. A limit plate is fixed at the front of the support bars at the same height. Insulating sleeves are symmetrically and continuously fixed above the rear sides of the cabinet above two support bars at the same height. A drawer body is movably connected to the outer sides of the two insulating sleeves at the same height. An opening is formed at the rear side of the drawer body near one short side. A rotating shaft is rotatably connected to each opening within the cabinet. A connecting plate is fixed to the front end of each rotating shaft. A fixing shell, a fixing block, and an insulating locking plate are fixed to the front side of the connecting plate. A fixing block is fixed to the outer side of the conductive post at the rear of the inner wall of each drawer body. A through-hole is formed on one side of each fixing block. An insulating locking plate is movably connected to the through-holes in two fixing blocks within the same drawer body. A connecting rod is fixed to the bottom of the insulating locking plate near the fixing shell. Connecting rod 1 and connecting rod 2 are positioned with connecting rod 1 away from the fixed block and connecting rod 2 close to the fixed block. During operation, the drawer body is connected to the rotating shaft through the movable opening, forming a rotatable mechanical linkage structure. The fixed shell is fixed to the rotating shaft through the connecting plate, serving as the fulcrum of the interlocking mechanism. The insulating locking plate slides within the fixed block through the through-hole to achieve mechanical limiting. The differentiated length design of connecting rod 1 and connecting rod 2 forms a timing control. When the drawer is pushed in, the insulating sleeve and the mating opening of the fixed block are precisely aligned. The conductive post forms an electrical connection with the connecting rod through the insertion hole. The movement of the insulating locking plate controls the on / off state of the connecting piece. When the drawer is not fully in place, the connecting rod restricts the position of the fixed shell to prevent misoperation. The position of the insulating locking plate determines the circuit on / off, ensuring power-off operation. The limit plate and the support bar cooperate to precisely control the drawer travel.

[0009] Furthermore, a conductive post is fixedly fixed inside the insulating sleeve, and an insertion hole is opened at the center of the front end of the conductive post. An insertion port is opened at the front end of the fixed shell. The fixed shell is located between connecting rod one and connecting rod two at the bottom of the insulating locking plate inside the drawer body. The length of connecting rod one is shorter than the length of connecting rod two. The conductive post inside the insulating sleeve serves as the core conductive component, and its front end insertion hole is used to establish an electrical connection. The insertion port at the front end of the fixed shell cooperates with the lock cylinder linkage mechanism to achieve mechanical locking. The fixed shell is precisely positioned between connecting rod one and connecting rod two to form a linkage fulcrum. The differentiated length design of connecting rod one (shorter) and connecting rod two (longer) achieves timing control. Connecting rod one moves first, triggering electrical disconnection, and connecting rod two moves later to complete mechanical locking.

[0010] Furthermore, a handle is fixed to the middle of the front side of the drawer body, a viewing mirror is fixed through the drawer body above the handle, a lock cylinder is fixed through the front side of the drawer body on one side of the viewing mirror, and mounting rails are fixed at equal intervals on the inner wall of the drawer body below the viewing mirror. The height of the mounting rails in the same drawer body is lower than the height of the fixing blocks. The equally spaced mounting rails form a standardized installation benchmark. The design that the height of the mounting rails is lower than that of the fixing blocks ensures that the fixing blocks are not disturbed when the drawer is pushed or pulled, reserves a safe space for electrical connection components, and forms a layered installation structure for easy maintenance and repair. During operation, the status is first confirmed through the viewing mirror, and the handle is used for pushing and pulling operations. If necessary, the position is locked by the lock cylinder. The mounting rails provide stable sliding guidance, and the fixing blocks maintain stable electrical connections.

[0011] Furthermore, ventilation holes are evenly distributed on both sides of the drawer body. Movable holes are correspondingly provided on the drawer body and the insulating sleeve at the same height inside the cabinet, with the insulating sleeve passing through the movable holes. A limit strip is fixed to the rear edge of the drawer body. The evenly distributed ventilation holes on both sides of the drawer body form a convection channel, which, together with the cabinet's ventilation opening, constitutes a complete heat dissipation duct, ensuring effective heat dissipation during equipment operation. A movable positioning mechanism, with the movable hole precisely matching the insulating sleeve, enables precise guiding movement of the drawer body, ensuring accurate alignment of electrical connection components. A limit protection device, with the limit strip on the rear edge cooperating with the support strip, forms a double limit protection mechanism to prevent excessive drawer insertion, ensuring accurate positioning of the working position and avoiding damage to connecting components due to misoperation.

[0012] Furthermore, each of the fixing blocks has a fitting opening at the center of its rear side. A connecting rod is fixed inside the fixing block at the front of the fitting opening. The front end of the connecting rod is flush with the rear side of the through-hole and extends into the fitting opening. The front end of the insulating sleeve is movably connected to the fitting opening, and the part of the connecting rod that extends into the fitting opening is inserted into the socket on the conductive post. The fitting opening on the rear side of the fixing block and the front end of the insulating sleeve form a precise fit. A guide structure design is adopted to ensure the accuracy of the insertion process, so that mechanical positioning and electrical connection are completed simultaneously. The front end of the connecting rod is precisely flush with the rear side of the through-hole, and the extension of the connecting rod is inserted into the socket of the conductive post to form a reliable electrical connection with low impedance. Mechanical connection: The fitting opening realizes the physical fixation between components, and the insertion structure ensures the stability of the current path. A safe timing sequence of "mechanical positioning first, then electrical conduction" is adopted.

[0013] Furthermore, a second connecting rod is fixed inside the fixing block in front of the through-hole. The rear end of the second connecting rod is flush with the front side of the through-hole, and the second connecting rod extends out of the front end of the fixing block. The central axes of the first and second connecting rods within the same fixing block are on the same straight line. The second connecting rod and the first connecting rod are arranged coaxially to form a straight current path. The rear end of the second connecting rod is precisely flush with the front side of the through-hole to ensure reliable contact. The front end of the second connecting rod extends out of the fixing block to provide an external connection interface. The coaxial design minimizes contact resistance, the flush connection ensures high current carrying capacity, and the plug-in connection improves ease of operation.

[0014] Furthermore, the insulating locking plate and the two fixing blocks inside the drawer body correspondingly have connecting plates fixedly installed through them. Both ends of one connecting plate are in contact with the adjacent ends of the first and second connecting rods in one fixing block. The connecting plates are integrated on the insulating locking plate to form a movable conductive bridge. The two ends of the connecting plates adopt an elastic contact design to ensure reliable contact with the connecting rods. Each fixing block has an independent set of connecting plates, which are connected to both the first and second connecting rods. When the insulating locking plate moves, it drives the connecting plates to move synchronously. The contact / separation of the connecting plates realizes the on / off control of the circuit. The mechanical position and electrical state strictly correspond to each other. The switching logic of "on first, off later" is adopted, with double insulation protection (insulating locking plate + insulating sleeve) and a visual on / off status indication.

[0015] Furthermore, a limiting piece is fixed on the insulating locking plate near the movable opening. The limiting piece abuts against the side of the fixed block near the movable opening. The limiting piece is fixed on the side of the insulating locking plate near the movable opening and is made of high-strength wear-resistant material to ensure long-term reliability. It forms precise planar contact with the side wall of the fixed block, limits the maximum movement of the insulating locking plate, prevents over-extension and mechanical damage, and forms a rigid abutment in the working position, providing additional mechanical support points.

[0016] Furthermore, each lock cylinder has a connecting rod fixed to its linkage end. A support frame is movably connected to the center of the connecting rod's periphery. The bottom end of the support frame is fixed to the inner bottom of the drawer body where the connecting rod is located. A fixing plate is fixed to the rear end of the connecting rod, and an insert plate is fixed to the rear end of the fixing plate. The insert plate is inserted into the socket at the front end of the fixed shell inside the drawer body. The lock cylinder serves as the operation input end. Torque is generated by rotating the key. The connecting rod converts the rotational motion into linear motion. The support frame provides stable motion guidance to prevent the connecting rod from swaying. The fixing plate amplifies the operating torque. The insert plate and the socket of the fixed shell are precisely matched. An inclined guide design is adopted to facilitate smooth insertion of the insert plate. When the insert plate is fully inserted into the socket, the mechanical locking is completed.

[0017] Furthermore, ventilation openings are provided on both sides of the cabinet and the drawer body, and reinforcing rods are evenly and vertically fixed in each ventilation opening. The limiting strip is set between two support strips of the same height in the cabinet body, and the drawer body is supported on two support strips of the same height in the cabinet body. The cabinet body and the drawer body are provided with through ventilation openings at corresponding positions, and the reinforcing rods are arranged in an array in the ventilation openings to form a grid-like protective structure, which realizes bidirectional airflow while ensuring structural strength.

[0018] The present invention has the following beneficial effects:

[0019] This invention solves the problem of insufficient safety during manual power disconnection in pull-out switchgear interlocking and power-off processes by setting up a cabinet body, drawer body, fixing block, insulating locking plate, and lock cylinder. When the drawer body is pushed back into its original position, the insert plate moves into the socket on the fixing shell, and the two connecting rods (first and second) reset. After the lock cylinder is turned again by the key, the linkage rod in the lock cylinder drives the fixing plate and insert plate to rotate within the fixing shell, pushing the longer connecting rod (second) at the bottom of the insulating locking plate. As the connecting plate rotates to lock the drawer body and cabinet, it pushes the limiting piece on the insulating locking plate to fit against a fixed block. At this time, the connecting piece moves to contact the first and second connecting rods, restoring the power connection to the equipment inside the drawer body. When the drawer body is pushed to reset, the fitting port on the fixed block moves to the insulating sleeve entering the first connecting rod on the fixed block. During the movement, the first connecting rod is inserted into the socket on the conductive post. After the first connecting rod is inserted into the socket on the conductive post, the power connection of the first connecting rod is restored. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A three-dimensional view of an interlocking system and assembly structure of a withdrawable switchgear;

[0022] Figure 2 This is a 3D structural diagram of the cabinet;

[0023] Figure 3 This is a three-dimensional structural diagram of the insulating sleeve;

[0024] Figure 4 This is a three-dimensional structural diagram of the fixed shell;

[0025] Figure 5 This is a three-dimensional structural diagram of the drawer body;

[0026] Figure 6 This is a three-dimensional view of the structure after the fixed block has been cut open.

[0027] Figure 7 This is a three-dimensional structural view of the insulating locking plate;

[0028] Figure 8 This is a three-dimensional structural diagram of the lock cylinder;

[0029] Figure 9 This is a three-dimensional view of the drawer's main structure from below.

[0030] Figure label:

[0031] 1. Cabinet body; 101. Insulating sleeve; 1011. Conductive post; 1012. Socket; 102. Fixed shell; 1021. Insertion port; 1022. Connecting plate; 1023. Shaft; 103. Vent; 104. Reinforcing rod; 105. Support bar; 106. Limiting plate; 2. Drawer body; 201. Sight mirror; 202. Handle; 203. Mounting rail; 204. Movable hole; 205. 206. Vent hole; 207. Limiting strip; 3. Fixing block; 301. Fitting opening; 302. Through opening; 303. Connecting rod one; 304. Connecting rod two; 4. Insulating locking plate; 401. Connecting piece; 402. Limiting piece; 403. Connecting rod one; 404. Connecting rod two; 5. Lock cylinder; 501. Connecting rod; 502. Support frame; 503. Fixing plate; 504. Insert plate. 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. Specific Implementation Example 1

[0033] Please see Figure 1-5 9. This invention relates to a withdrawable switchgear interlock and switchgear, comprising a plurality of parallel support bars 105 fixed at equal intervals on the inner walls of both sides of the cabinet body 1. The front parts of the support bars 105 at the same horizontal height are connected laterally by a limiting plate 106. On the rear side of the cabinet body 1 at the corresponding position of each set of support bars 105, a through-and-fixed insulating sleeve 101 assembly is symmetrically installed, which has a built-in conductive post 1011, a socket 1012 machined at the center of its front end, and a fixing shell 102 with a socket 1021 at the front end. The drawer body 2 is movably connected to the insulating sleeve 101 through a movable hole 204. An insulating locking plate 4 is provided inside the drawer body 2. The cabinet 1 is equipped with connecting rods of varying lengths, with shorter connecting rod 403 and longer connecting rod 404. The fixing shell 102 is precisely installed between the two connecting rods. Ventilation openings 103 are provided at corresponding positions on the cabinet body 1 and the drawer body 2. An array of reinforcing rods 104 is provided inside. Ventilation holes 206 are evenly distributed on the side wall of the drawer body 2. Limiting strips 207 are set between the support strips 105 inside the cabinet 1. The drawer body 2 is supported by the support strips 105. A handle 202 is installed in the middle of the front side of the drawer body 2. A viewing mirror 201 and a lock cylinder 5 are provided on the upper part. Multiple mounting rails 203 of the same height are provided on the inner wall. Their installation height is lower than the arrangement position of the fixing block 3.

[0034] Specifically, during operation, pulling the handle 202 on the drawer body 2 will pull the drawer body 2 out from the limiting plate 106 on the inner wall of the cabinet 1. As you continue to pull the handle 202 until the drawer body 2 moves to the appropriate position, you can release the handle 202 to prepare for the installation of electrical equipment inside the cabinet 1. During the pulling of the handle 202, the limiting strip 207 at the bottom of the drawer body 2 prevents the cabinet 1 and the drawer body 2 from separating directly. After the drawer body 2 is pulled out of the cabinet 1, place the electrical equipment on the mounting rail 203 inside the drawer body 2 and install it with mounting bolts or other mounting structures. The electrical equipment can then be installed inside the drawer body 2, and the heat dissipation equipment can be placed inside the drawer body 2. Then push the handle 202 to push the drawer body 2 completely into the cabinet 1. After powering on, you can perform electrical power-on work and observe the working status of the electrical equipment inside the drawer body 2 through the sight glass 201 on the drawer body 2.

[0035] Furthermore, when the electrical equipment in the drawer body 2 is in operation, the heat dissipation device installed in the drawer body 2 is activated. During operation, air is drawn in through the gap between the reinforcing rods 104 in the vent 103 on one side of the cabinet 1, and then enters through the vent 206 on one side of the drawer body 2. After being cooled by the electrical equipment in the drawer body 2, it is discharged through the vent 206 on the other side of the drawer body 2 to the vent 103 on the cabinet 1, and then discharged after passing through the reinforcing rods 104 between the vents 103, thus completing the cooling of the electrical equipment in the drawer body 2. Specific Implementation Example 2

[0036] Please see Figure 1-8 Based on the first specific embodiment, it also includes a fixing block 3 and an insulating locking plate 4 that fits closely therewith. Each fixing block 3 has a fitting opening 301 at the center of its rear side. Inside the fixing block 3 in front of the fitting opening 301, a connecting rod 303 is securely fixed. The front end of the connecting rod 303 is flush with the rear side of the through hole 302, and a part of the connecting rod 303 extends into the fitting opening 301.

[0037] The front end of the insulating sleeve 101 can be movably connected to the fitting 301. At the same time, the part of the connecting rod that extends into the fitting 301 is accurately inserted into the pre-drilled socket 1012 on the conductive post 1011. This tight connection method ensures the stability and reliability of electrical conduction.

[0038] Each drawer body 2 has a fixing block 3 firmly fixed to the outer side of the conductive post 1011 on the rear of the inner wall of the drawer body 2. A through hole 302 is provided on one side of the fixing block 3. This through hole 302 does not exist in isolation, but works in conjunction with other components. In the same drawer body 2, the through holes 302 in the two fixing blocks 3 together provide space for the movable connection of the insulating locking plate 4, so that the insulating locking plate 4 can move flexibly in it.

[0039] The insulating locking plate 4 also has a sophisticated design. At its bottom, near the fixed housing 102, there are two connecting rods, one 403 and the other 404. The first connecting rod 403 is deliberately set away from the fixed block 3, while the second connecting rod 404 is set close to the fixed block 3. This differentiated layout helps the insulating locking plate 4 to achieve precise positioning and stable operation in the device.

[0040] Each drawer body 2 has a lock cylinder 5 fixed through one side of the front viewing mirror 201 and handle 202. The drawer body 2 has a movable opening 205 through one side of the rear side near a short side. This movable opening 205 is closely related to the components inside the cabinet 1. On the rear side inside the cabinet 1, at the position that precisely corresponds to each movable opening 205, a pivot 1023 is rotatably connected. The front end of each pivot 1023 is firmly fixed with a connecting plate 1022. The connecting plate 1022 further enhances the connection between the pivot 1023 and other components. On the front side of the connecting plate 1022, a fixed shell 102 is fixed. These components are connected layer by layer to form an organic whole.

[0041] Each lock cylinder 5 has a linkage rod 501 fixed at its linkage end. The support frame 502 is movably connected to the center of the linkage rod 501. The bottom end of the support frame 502 is firmly fixed to the inner bottom of the drawer body 2 where the linkage rod 501 is located, providing stable support for the linkage rod 501 and ensuring its accuracy during movement. A fixing plate 503 is fixed to the rear end of the linkage rod 501. A plug plate 504 is further fixed to the rear end of the fixing plate 503, which is precisely inserted into the specially opened socket 1021 at the front end of the fixing shell 102 inside the drawer body 2. Through this insertion method, the effective linkage between the lock cylinder 5 and the fixing shell 102 is realized, thereby controlling the relevant operations of the drawer body 2.

[0042] The insulating locking plate 4 and the two fixing blocks 3 inside the drawer body 2 are respectively fixed with the connecting rod 303 and the connecting piece 401. The two ends of the connecting piece 401 can simultaneously make close contact with the end of the connecting rod 303 and the connecting rod 304 inside the fixing block 3.

[0043] On the insulating locking plate 4 near the movable opening 205, a limiting piece 402 is also fixed. The function of the limiting piece 402 is to restrict the movement range of the insulating locking plate 4. It abuts tightly against the side of the fixing block 3 near the movable opening 205, thereby ensuring that the insulating locking plate 4 moves within the specified range.

[0044] Specifically, when the switch cabinet needs to be opened, first insert the matching key corresponding to lock cylinder 5, then turn the key. The linkage end of lock cylinder 5 rotates, driving the connecting rod 501 to rotate. The connecting rod 501 is inside the drawer body 2 and is supported by the support frame 502 fixed inside the drawer body 2. As the connecting rod 501 rotates, it drives the fixed plate 503 and the insert plate 504 to rotate. The rotation of the insert plate 504 drives the fixed shell 102, the connecting plate 1022, and the rotating shaft 1023 to rotate, so that the long side of the end face of the fixed shell 102 rotates to a state where it is flush with the long edge of the movable opening 205 on the drawer body 2. During this process, The rotating fixed shell 102 pushes the connecting rod 403 to move the insulating locking plate 4 away from the fixed block 3, causing the contact piece 401 on the insulating locking plate 4 to move away from the end faces of the contact rod 303 and the contact rod 304 that are close to each other, thus achieving the power-off function for the equipment inside the cabinet 1. At the same time, it releases the locking function of the cabinet 1 and the drawer body 2, so that the power-off operation of the drawer can be completed before the drawer body 2 is pulled out. The part of the contact rod 304 that extends out of the fixed block 3 is connected to the energized equipment in the electrical circuit inside the drawer body 2, so as to perform the power-on operation for the electrical equipment inside the drawer body 2.

[0045] Furthermore, when the drawer body 2 is pushed back to its original position, the insert plate 504 moves into the insertion port 1021 on the fixed shell 102. The two connecting rods 403 and 404 are reset. After the structure in the lock cylinder 5 is turned again by the key, the linkage rod 501 in the lock cylinder 5 drives the fixed plate 503 and the insert plate 504 to rotate in the fixed shell 102, pushing the longer connecting rod 404 at the bottom of the insulating locking plate 4. At the same time as the connecting plate 1022 rotates to lock the drawer body 2 and the cabinet 1, the limiting piece 402 on the insulating locking plate 4 is pushed to fit against a fixed block 3. At this time, the connecting piece 401 moves to contact the connecting rod 303 and the connecting rod 304, and restores the power supply to the equipment in the drawer body 2. Specific Implementation Example 3

[0046] Please see Figure 1-6Based on specific embodiments one and two, a highly conductive post 1011 is provided through the interior of the insulating sleeve 101. A socket 1012 is precisely machined at the center of the front end of the conductive post 1011 for reliable electrical connection. The matching socket 102 of the mating housing 102 has a matching insertion port 1021 at its front end. Its installation position is precisely calculated and located between connecting rod 403 and connecting rod 404 at the bottom of the insulating locking plate 4 inside the drawer body 2. Connecting rod 403 is designed to be shorter, while connecting rod 404 is longer; this differentiated length design ensures the timing of the mechanical interlock. In the structural design of the fixing block 3, a standardized fitting opening 301 is machined at the center of its rear side. A connecting rod 303 is built into the front of the fitting opening 301, with its front end precisely flush with the rear side of the through-hole 302. The connecting rod 303 extends into the fitting opening 301. The entire electrical connection system achieves mechanical positioning through the movable connection between the front end of the insulating sleeve 101 and the fitting port 301. At the same time, the connecting rod 303 is inserted into the socket 1012 of the conductive post 1011 to complete electrical conduction. This dual connection method ensures mechanical stability.

[0047] Specifically, during operation, after the initial power disconnection between the conductive post 1011 and the electrical equipment inside the drawer body 2 is completed by the insulating locking plate 4, when the handle 202 on the drawer body 2 is pulled, as the drawer body 2 is pulled inside the cabinet 1, the fitting port 301 in the fixing block 3 separates from the insulating sleeve 101, and the connecting rod 303 in the fixing block 3 is pulled out from the insertion hole 1012 on the conductive post 1011 to further disconnect the power.

[0048] Furthermore, when the drawer body 2 is pushed to the reset position, the fitting port 301 on the fixing block 3 moves to the insulating sleeve 101 entering the electrical rod 303 on the fixing block 3. During the movement, the electrical rod 303 is inserted into the socket 1012 on the conductive post 1011. After the electrical rod 303 is inserted into the socket 1012 on the conductive post 1011, the power connection of the electrical rod 303 is restored.

[0049] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A withdrawable switchgear interlock, comprising: Cabinet (1), both sides of the inner wall of the cabinet (1) are fixed with a number of parallel support bars (105) at equal intervals, and the front of the support bars (105) at the same height is fixed with a limit plate (106). An insulating sleeve (101) is symmetrically fixed to the rear side of the cabinet (1) above the two support bars (105) of the same height. The two insulating sleeves (101) of the same height are movably connected to the drawer body (2) on the outside. A conductive column (1011) is fixed inside the insulating sleeve (101). The drawer body (2) has a through opening (205) on the rear side near a short side. The cabinet (1) has a rotating shaft (1023) rotatably connected to each of the openings (205). Each rotating shaft (1023) has a connecting plate (1022) fixed at the front end. The front side of the connecting plate (1022) has a fixed shell (102). The drawer body (2) has a limit strip (207) fixed at the rear edge. Fixing block (3) and insulating locking plate (4): a fixing block (3) is fixed on the outer side of the conductive post (1011) at the rear of the inner wall of each drawer body (2). A through hole (302) is opened on one side of the fixing block (3). An insulating locking plate (4) is movably connected in the through hole (302) of the two fixing blocks (3) in the same drawer body (2). A connecting rod one (403) and a connecting rod two (404) are fixed at the bottom of the insulating locking plate (4) near the fixing shell (102). The connecting rod one (403) is set away from the fixing block (3), and the connecting rod two (404) is set close to the fixing block (3). Each of the fixed blocks (3) has a fitting opening (301) at the center of its rear side. A connecting rod (303) is fixed in the fixed block (3) at the front of the fitting opening (301). The front end of the connecting rod (303) is flush with the rear side of the through hole (302), and the connecting rod (303) extends into the fitting opening (301). The front end of the insulating sleeve (101) is movably connected to the fitting opening (301), and the part of the connecting rod (303) that extends into the fitting opening (301) is inserted into the socket (1012) on the conductive post (1011).

2. The interlocking mechanism for a withdrawable switchgear according to claim 1, characterized in that: The conductive post (1011) has a socket (1012) at the center of its front end, and the fixed shell (102) has a socket (1021) at its front end. The fixed shell (102) is located between the connecting rod one (403) and the connecting rod two (404) at the bottom of the insulating locking plate (4) inside the drawer body (2). The length of the connecting rod one (403) is less than the length of the connecting rod two (404).

3. The interlocking mechanism for a withdrawable switchgear according to claim 2, characterized in that: A handle (202) is fixed in the middle of the front side of the drawer body (2). A viewing mirror (201) is fixed through the drawer body (2) above the handle (202). A lock cylinder (5) is fixed through the front side of the drawer body (2) on one side of the viewing mirror (201). Mounting rails (203) are fixed at equal intervals on the inner wall of the drawer body (2) below the viewing mirror (201). The height of the mounting rails (203) in the same drawer body (2) is lower than the height of the fixing block (3).

4. The interlocking mechanism for a withdrawable switchgear according to claim 1, characterized in that: Both sides of the drawer body (2) are provided with ventilation holes (206). The drawer body (2) and the cabinet (1) are provided with movable holes (204) corresponding to the position of the insulating sleeve (101) at the same height. The insulating sleeve (101) passes through the movable hole (204).

5. The interlocking mechanism for a withdrawable switchgear according to claim 1, characterized in that: A second power receiving rod (304) is fixed in the fixing block (3) in front of the opening (302). The rear end of the second power receiving rod (304) is flush with the front side inside the opening (302), and the second power receiving rod (304) extends out of the front end of the fixing block (3). The central axes of the first power receiving rod (303) and the second power receiving rod (304) in the same fixing block (3) are on the same straight line.

6. The interlocking mechanism for a withdrawable switchgear according to claim 5, characterized in that: The insulating locking plate (4) is fixed with a connecting piece (401) corresponding to the position of the first connecting rod (303) in the two fixing blocks (3) in the main body of the drawer (2). Both ends of the connecting piece (401) are in contact with the ends of the first connecting rod (303) and the second connecting rod (304) in the fixing block (3).

7. The interlocking mechanism for a withdrawable switchgear according to claim 1, characterized in that: A limiting piece (402) is fixed on the insulating locking plate (4) near the movable opening (205), and the limiting piece (402) abuts against the side of the fixing block (3) near the movable opening (205).

8. The interlocking mechanism for a withdrawable switchgear according to claim 3, characterized in that: Each lock cylinder (5) has a linkage end fixed with a connecting rod (501). A support frame (502) is movably connected to the center of the periphery of the connecting rod (501). The bottom end of the support frame (502) is fixed to the inner bottom of the drawer body (2) where the connecting rod (501) is located. A fixing plate (503) is fixed to the rear end of the connecting rod (501). A plug plate (504) is fixed to the rear end of the fixing plate (503). The plug plate (504) is inserted into the socket (1021) at the front end of the fixing shell (102) inside the drawer body (2).

9. A switch cabinet, comprising the withdrawable switch cabinet interlock as described in any one of claims 1-8, characterized in that: Ventilation openings (103) are provided on both sides of the cabinet (1) and the drawer body (2) respectively. Reinforcing rods (104) are evenly and vertically fixed in the ventilation openings (103). The limiting strip (207) is set between two support strips (105) of the same height in the cabinet (1), and the drawer body (2) is supported on the two support strips (105) of the same height in the cabinet (1).

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