Switchgear and interlock for switchgear circuit breaker

Abstract

The application discloses a switch cabinet and an interlocking device for a switch cabinet breaker, and relates to the technical field of switch cabinets.The application comprises a switch cabinet body, an insulating column is fixed through the rear side of the switch cabinet body, and an electric connection column one is fixed symmetrically through the insulating column;an installation assembly comprises two mutually parallel support plates fixed in the switch cabinet body, and a baffle is movably connected in the movable port of the support plate;an electric connection assembly comprises a lock cylinder fixed at the front side edge of the bottom of the lower support plate, and a locking assembly is fixed symmetrically on the upper part of the periphery of the lock cylinder;the two locking assemblies comprise a connecting sleeve fixed on the upper part of the periphery of the lock cylinder, a rotating column is movably connected in each connecting sleeve, and an elastic plate is fixed at the front end of the rotating column;and a fixed frame is fixed in front of the opening at the top of the upper support plate.The baffle arranged in the switch cabinet blocks the electric connection assembly during maintenance, and thus the operator is prevented from making an error operation and connecting electricity incorrectly.

Description

Technical Field

[0001] This invention belongs to the field of switchgear technology, and in particular relates to switchgear and interlocking devices for switchgear circuit breakers. Background Technology

[0002] A switchgear is a complete set of power distribution equipment that integrates electrical devices such as circuit breakers, disconnect switches, protection devices, and measuring instruments. It is mainly used for power distribution, circuit control, and system protection in power systems. Its enclosure is typically made of metal or insulating materials and has a certain protection rating (such as IP54) to ensure dustproof, waterproof, and mechanical protection capabilities, adapting to the safe operation requirements of different environments. Its main functions are: power distribution, allocating power to different branches according to demand to optimize the power supply structure; circuit control, managing the on / off state of load current through circuit breakers, disconnect switches, and other equipment; and system protection, quickly disconnecting the circuit in the event of short circuits, overloads, or other faults to ensure the safety of the power grid and equipment.

[0003] Circuit breakers in switchgear are typically equipped with mechanical or electrical interlocking devices. These are key structures for ensuring operational safety, and their core function is to prevent misoperation (such as opening or closing disconnecting switches under load, or accidentally entering energized compartments), thereby avoiding personal injury or equipment damage. The main functions of the interlocking devices include: preventing misoperation of disconnecting switches; when the circuit breaker is in the closed state, the mechanical interlock will prevent the disconnecting switch from opening or closing, preventing the cabinet door from being opened accidentally; when the circuit breaker is not open, the interlocking mechanism will lock the cabinet door, ensuring that operators cannot open energized compartments; grounding protection interlock, prohibiting the closing of grounding switches under energized conditions to avoid short circuit risks; and prohibiting the circuit breaker from closing when the grounding switch is closed, ensuring maintenance safety.

[0004] A search of existing public documents revealed a patent document with publication number CN110993426A, which discloses a circuit breaker interlocking device for a solid-insulated switchgear. The device includes a cabinet with a rotatable half-shaft for opening, a half-shaft for closing, and an isolating operating shaft. A panel is mounted on the cabinet, featuring a closing window, an opening window, and an operating window. A slidable baffle plate is mounted on the panel, with an operating hole on the baffle plate. The cabinet contains an electrical linkage component and an isolating linkage component. A baffle plate extends towards the closing window to form a baffle plate. A locking pin passes through the lower edge of the cabinet, and a locking plate is connected to the locking pin. A return spring is fitted onto the locking pin, abutting against the cabinet and the locking plate. The cabinet also contains a locking pin limiting component. A locking protrusion extends from the locking plate towards the baffle plate, and a locking stop is formed along the edge of the baffle plate. The locking protrusion and the locking stop abut against each other, limiting the sliding of the baffle plate. Its structure is simple and reasonable, effectively realizing the interlocking between the isolation operating shaft, closing half shaft, opening half shaft and lower door, ensuring the overall safe use.

[0005] However, the above-mentioned patents still have the following drawbacks in practical use:

[0006] In practical applications, mechanical interlocks are directly used. After opening the cabinet, the power supply line is disconnected from the equipment inside the switch cabinet before maintenance. However, during the maintenance process, the operator may forget to remove the key, causing the key to be accidentally touched during construction. After turning the key, the power supply is restored, which may cause safety hazards during maintenance and other operations, resulting in safety accidents and affecting the operational safety of the switch cabinet. Summary of the Invention

[0007] The purpose of this invention is to provide a switch cabinet and an interlocking device for the switch cabinet circuit breaker. By setting up the switch cabinet body, mounting components, power connection components, locking components, fixing frame and baffle, the invention solves the problem that a safety accident may occur due to operator error in re-energizing the switch cabinet circuit breaker after power failure.

[0008] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0009] This invention relates to a switchgear and an interlocking device for a switchgear circuit breaker, comprising a switchgear body, an insulating column fixed through the rear side of the switchgear body, and a power connection column symmetrically fixed through the insulating column; an installation assembly including two parallel support plates fixed inside the switchgear body, each support plate having a vertically penetrating opening, and a movable opening in front of the opening on the lower support plate, with a baffle movably connected within the movable opening; a power connection assembly including a lock cylinder fixed at the front edge of the bottom of the lower support plate, a connecting rod fixed to the linkage end of the lock cylinder, a rotating block fixed to the rear end of the connecting rod, an inner fixing sleeve sleeved around the rotating block, the inner fixing sleeve being fixed to the rear side of the inner wall of the switchgear body, and locking assemblies symmetrically fixed to the upper part of the circumference of the lock cylinder; and two locking assemblies. The components include a connecting sleeve fixed to the upper part of the lock cylinder, with a rotating post movably connected inside each connecting sleeve, and an elastic plate fixed to the front end of the rotating post; a fixing frame, fixed in front of the opening at the top of the upper support plate. During operation, the installation component, power connection component, locking component, fixing frame, and baffle are installed in the switch cabinet body. The two support plates included in the installation component divide the switch cabinet into three functional spaces: the lower wiring section, the electrical equipment installed between the two support plates, and the upper fixed frame fixing the mounting panel of the display device. During operation of the locking component, after locking, the electrical equipment in the switch cabinet is powered on. The fixing frame fixes the mounting panel of the display device in it, and the baffle shields the electrical equipment between the two support plates inside the switch cabinet body.

[0010] Furthermore, a door panel is hinged to the front side of the main body of the switch cabinet, and a glass plate is fixed through the upper part of the door panel. The height of the glass plate is higher than the support plate located above. A door lock is fixed through one side of the door panel. When the main body of the switch cabinet is in operation, the front opening is closed by the door panel, and the glass plate displays the data and other information displayed by the display device inside the main body of the switch cabinet. The door panel is locked to the main body of the switch cabinet by the door lock.

[0011] Furthermore, the inner fixing sleeve is fixed on the inner wall of the switch cabinet body outside the insulating column. The inner fixing sleeve is symmetrically fixed with two terminals through its periphery. When the inner fixing sleeve is working, the two terminals inside it extend out of the inner fixing sleeve, and the end of the two terminals away from the inner fixing sleeve is connected to the equipment installed in the assembly inside the switch cabinet body.

[0012] Furthermore, symmetrical support columns are fixed to the front of the bottom surface of the switch cabinet body. Support grooves are opened at the top of the two support columns. The support grooves correspond to the positions of the baffles. Several equally spaced wire holes are opened at the lower rear side of the switch cabinet body. The support grooves at the top of the support columns inside the switch cabinet body are movably connected to the baffles. The baffles are suspended inside the switch cabinet body. Signal lines and other lines pass through the wire holes inside the switch cabinet body.

[0013] Furthermore, the mounting assembly also includes mounting strips and mounting holes. Several mounting strips for mounting electrical equipment are fixed together on the rear sides of the openings in the two support plates, and the mounting strips are arranged parallel to each other. Mounting holes are equally spaced through the front side of the mounting strips along the vertical center line. The mounting assembly includes mounting strips and mounting holes on the mounting strips, which allow electrical equipment to be installed on the mounting strips by screwing mounting bolts into the mounting holes after being attached to the front side of the mounting strips.

[0014] Furthermore, L-shaped electrical terminals are symmetrically fixed at the rear of the rotating block. The rear ends of the two L-shaped electrical terminals abut against the front end of the first electrical terminal. The ends of the two L-shaped electrical terminals near the front side are in contact with the two second terminals inside the inner fixed sleeve. After the L-shaped electrical terminals inside the rotating block contact the first electrical terminal, the L-shaped electrical terminals are electrically connected to the first electrical terminal. At this time, the L-shaped electrical terminals are in contact with the second terminals, ensuring that the power connection operation inside the switch cabinet body can be performed well during operation. After further power connection, after rotating the rotating block, the L-shaped electrical terminals separate from the first electrical terminal and the second terminal, further separating the switch cabinet body.

[0015] Furthermore, a mounting panel is movably connected within the fixed frame. A slot is provided at the rear edge of the mounting panel, and the slot engages with the front side of the fixed frame. When the fixed frame is in operation, the slot on the mounting panel engages with the fixed frame, so that the fixed frame and the mounting panel are combined together during operation.

[0016] Furthermore, the mounting panel has a rectangular array of through slots, and the mounting panel outside the slots has a rectangular array of mounting screw holes. The mounting screw holes are distributed at each corner outside the slots, and each corner on the front side of the mounting panel has an insertion hole. Each insertion hole communicates with a slot, and each insertion hole is inserted with a mounting bolt. The mounting bolts pass through the mounting panel and are threaded into the fixing frame. When the mounting panel is in operation, the slots on it are movably connected to the display device. After the mounting bolts are inserted into the display device, they are screwed into the mounting screw holes to install the display device on the mounting panel. By inserting the mounting bolts into the mounting panel and then screwing them into the fixing frame, the combination between the fixing frame and the mounting panel is completed during operation.

[0017] Furthermore, the elastic plate abuts against the front side of the baffle located below the lower support plate, and the baffle is supported on the periphery of the rotating column. Each rotating column has a limit plate fixed at its rear end, and the limit plate abuts against the front end of the connecting sleeve. When the elastic plate is working, by being set on the periphery of the rotating column, the limit plate can restrict the operation and rotate the elastic plate to press it against the baffle, preventing the baffle from falling down during operation.

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

[0019] This invention solves the safety problem of potential accidents caused by operator error in re-energizing a circuit breaker after power failure by setting up a switchgear body, mounting components, power connection components, locking components, fixing frame, and baffle. After the maintenance access is opened and the switchgear body enters the maintenance state, the operator must first rotate the elastic plate to disengage it from the baffle contact surface, then apply appropriate thrust to move the rotating column backward within the connecting sleeve until the elastic plate contacts the front end of the connecting sleeve. At this point, the baffle automatically falls from the movable opening of the lower support plate and smoothly lands in the support groove of the support column. After the plate is in place, its top is flush with the plane of the support plate below, forming a safe working platform. In this state, electrical equipment installed on the support bar can be inspected and maintained. In this state, the lock cylinder of the power connection component is covered by the baffle. The operator needs to push the baffle up to expose the lock cylinder before inserting the key to restore power. After the baffle is raised, it can be locked by the locking structure, which will also cover the electrical equipment inside the switch cabinet. The operator cannot access the electrical equipment inside the switch cabinet after it is powered on, which can well ensure the safety of the power-on operation. 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 the assembly structure of the switchgear and the interlocking device used for the switchgear circuit breaker;

[0022] Figure 2 A three-dimensional structural view of the main body of the switch cabinet;

[0023] Figure 3 This is a three-dimensional view of the structure of the insulating column after it has been cut open.

[0024] Figure 4 A three-dimensional structural diagram of the installed components;

[0025] Figure 5 This is a three-dimensional structural diagram of the power connection assembly;

[0026] Figure 6 This is a three-dimensional structural view of the internal fixing sleeve;

[0027] Figure 7 This is a three-dimensional view of the structure after the block has been disassembled.

[0028] Figure 8 A three-dimensional view of the structure after the locking component has been partially cut open;

[0029] Figure 9 This is a three-dimensional view of the structure after the fixed frame and mounting panel are combined.

[0030] Figure 10 This is a rear-view perspective view of the mounting panel.

[0031] Figure label:

[0032] 1. Switch cabinet body; 101. Door panel; 1011. Door lock; 102. Glass panel; 103. Insulating column; 1031. Power connection column one; 104. Wiring hole; 105. Support column; 106. Support groove;

[0033] 2. Mounting components; 201. Support plate; 202. Opening; 203. Mounting strip; 204. Mounting hole; 205. Movable opening;

[0034] 3. Electrical connection assembly; 301. Lock cylinder; 302. Linkage rod; 303. Rotary block; 3031. L-shaped electrical connection post; 304. Inner fixing sleeve; 3041. Terminal block two;

[0035] 4. Locking component; 401. Connecting sleeve; 402. Rotary column; 403. Limiting plate; 404. Elastic plate;

[0036] 5. Fixing frame; 501. Mounting panel; 5011. Slot; 502. Mounting bolt; 503. Insertion hole; 504. Bayonet; 505. Mounting screw hole;

[0037] 6. Baffle. Detailed Implementation

[0038] 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

[0040] Please see Figure 1-10This invention relates to a switchgear and an interlocking device for a switchgear circuit breaker, comprising a switchgear body 1, an insulating column 103 fixedly through the rear side of the switchgear body 1, and symmetrically fixed power connection columns 1031 through the insulating column 103; a mounting assembly 2, comprising two parallel support plates 201 fixed inside the switchgear body 1, each support plate 201 having a vertically through opening 202, and a movable opening 205 in front of the opening 202 on the lower support plate 201, with a baffle 6 movably connected within the movable opening 205; and a power connection assembly 3, comprising a fixed... At the bottom front edge of the lower support plate 201, a lock cylinder 301 has a linkage rod 302 fixed to its linkage end. A rotating block 303 is fixed to the rear end of the linkage rod 302. An inner fixing sleeve 304 is sleeved around the rotating block 303 and fixed to the rear side of the inner wall of the switch cabinet body 1. Locking components 4 are symmetrically fixed to the upper part of the periphery of the lock cylinder 301. The two locking components 4 include connecting sleeves 401 fixed to the upper part of the periphery of the lock cylinder 301. A rotating post 402 is movably connected inside each connecting sleeve 401. The front end of the rotating post 402 is fixed with a... A flexible plate 404; a fixed frame 5, fixed in front of the opening 202 at the top of the upper support plate 201; a door panel 101 is hinged to the front of the switch cabinet body 1; a glass plate 102 is fixed through the upper part of the door panel 101, the height of the glass plate 102 is higher than the upper support plate 201; a door lock 1011 is fixed through one side of the door panel 101; support columns 105 are symmetrically fixed to the front of the bottom surface inside the switch cabinet body 1; each of the two support columns 105 has a support groove 106 at its top, the support groove 106 corresponds to the position of the baffle 6; the switch cabinet body 1 The lower part of the rear side is provided with several equally spaced wire holes 104. The mounting assembly 2 also includes mounting strips 203 and mounting holes 204. Several mounting strips 203 for installing electrical equipment are fixed together on the rear side of the openings 202 in the two support plates 201. The mounting strips 203 are arranged parallel to each other. The mounting holes 204 are equally spaced through the front side of the mounting strips 203 along the vertical center line. The mounting panel 501 is movably connected in the fixed frame 5. The mounting panel 501 has a slot 5011 at the rear edge of the mounting panel 501. The slot 5011 is engaged with the front side of the fixed frame 5.

[0041] The mounting panel 501 has a rectangular array of slots 504 inside. The mounting panel 501 outside the slots 504 has a rectangular array of mounting screw holes 505. The mounting screw holes 505 are distributed at each corner outside the slots 504. Each corner of the front side of the mounting panel 501 has an insertion hole 503. Each insertion hole 503 is connected to the slot 5011. Each insertion hole 503 is inserted through and a mounting bolt 502 is inserted. After passing through the mounting panel 501, the mounting bolt 502 is threaded into the fixing frame 5. The elastic plate 404 abuts against the front side of the baffle 6 located below the lower support plate 201. The baffle 6 is supported on the periphery of the rotating column 402. Each rotating column 402 has a limit plate 403 fixed at its rear end. The limit plate 403 abuts against the front end of the connecting sleeve 401.

[0042] The device employs multiple advanced technologies to ensure reliable installation and safe operation of electrical equipment. Its overall design fully considers ease of installation, operational safety, and maintenance convenience. Specific technical features are as follows:

[0043] Regarding the structure of the main body 1 of the switchgear, the main body 1 adopts a modular design concept. A high-performance composite insulating column 103 is fixed through the rear side. The insulating column 103 is made of epoxy resin composite material, which has excellent insulation performance (insulation resistance ≥1000MΩ) and mechanical strength (bending strength ≥120MPa). Two sets of high conductivity contact posts 1031 are symmetrically arranged inside the insulating column 103. The surface is specially silver-plated, and the contact resistance is ≤0.5mΩ to ensure the reliability of electrical connection. The frame of the main body 1 of the switchgear is formed by bending 1.5mm high-quality cold-rolled steel plate. After phosphating treatment, the surface is coated with electrostatic spraying process with a coating thickness ≥60μm, which not only ensures structural strength but also improves weather resistance. The rear ends of the two contact posts 1031 are electrically connected and fixed to the two contact electrodes of the power line respectively.

[0044] The internal support system features an innovative design. Two reinforced support plates 201 are installed parallel to each other inside the main body 1 of the switchgear. These plates are made of 3mm thick Q235 steel and laser-cut to create vertical through-holes 202 with a precision of ±0.1mm. The lower support plate 201 has an adjustable movable opening 205 and a 304 stainless steel baffle 6, forming a flexible installation channel. The surface roughness of the baffle 6 is Ra≤1.6μm, ensuring smooth sliding. The support plates 201 are fixed to the main body 1 by 8-point welding, with tested welding strength exceeding 4000N.

[0045] The power connection component 3 system adopts a precision mechanical linkage mechanism, including a copper alloy lock cylinder 301 and a transmission mechanism. The lock cylinder 301 is connected to the rear rotating block 303 via a φ8mm high-strength linkage rod 302. The engineering plastic inner fixing sleeve 304 fitted outside the rotating block 303 has self-lubricating properties and a friction coefficient ≤0.15. The two sets of high-precision locking components 4 include an aluminum alloy connecting sleeve 401, a chrome-plated rotating column 402 (hardness ≥800HV), and a high-elasticity stainless steel elastic plate 404 (elastic modulus 190GPa). The CNC-machined limit plate 403 at the rear end of the rotating column 402 ensures a positioning accuracy of ±0.05mm.

[0046] The door observation system is designed with practicality and safety in mind. The heavy-duty hinged door panel 101 uses a 2mm steel plate frame with an 8mm tempered glass observation window with a light transmittance of ≥85%. The three-point safety door lock 1011 system has an IP54 protection rating and a lock life test of ≥10,000 opening and closing cycles. The door panel 101 is designed with an opening angle of 120°, which makes it easy for operators to observe the status of the internal equipment from all angles.

[0047] The auxiliary support structure is carefully designed. The bottom two sets of φ30mm solid steel support columns 105 have support grooves 106 at the top with shock-absorbing rubber pads with a Shore hardness of 60±5. The 12 φ25mm wire passage holes 104 at the rear are treated with a flanged process with a flanged height of 2mm, which effectively protects the cable insulation layer.

[0048] The standardized installation system embodies industrial design concepts. The positional tolerance of the φ6.5mm mounting holes 204, which are equally spaced on the six 30×15mm aluminum alloy mounting strips 203, is controlled within 0.2mm. The quick-release panel is made of 1.5mm galvanized steel plate. The 5×5 matrix bayonet 504, together with the M5 mounting screw holes 505, enables the installation of various equipment. The tolerance of the four corner φ6mm insertion holes 503 and the M6 ​​stainless steel mounting bolts 502 is controlled at the H8 / f7 level to ensure convenient disassembly and assembly.

[0049] Specifically, during the equipment installation preparation stage, the operator first uses a special key to open the three-point safety door lock 1011 on the door panel 101. This lock adopts a two-way rotation opening mechanism. It can be unlocked by rotating 120° clockwise. Slowly pull the door panel 101 to the maximum opening angle (120°). At this time, the internal space of the switch cabinet body 1 can be fully exposed. After confirming safety by observing the status of the internal components, hold the handle of the elastic plate 404 and rotate it 90° clockwise to make the elastic plate 404 completely disengage from the contact surface of the baffle 6.

[0050] During the installation channel opening operation, push the elastic plate 404 forward with appropriate force (about 50N) to drive the rotating column 402 to move smoothly backward in the inner fixing sleeve 304. When you hear a "click" sound (indicating that the limit plate 403 has contacted the front end of the connecting sleeve 401), stop applying force. At this time, the baffle 6 will automatically unlock. The operator holds the baffle 6, and the baffle 6 will fall smoothly under the action of gravity and finally accurately embed into the support groove 106 at the top of the support column 105. The shock-absorbing rubber pad in the groove effectively buffers the impact force. The top of the baffle 6 and the plane of the support plate 201 maintain a height consistency of ±0.2mm, forming a complete equipment installation platform.

[0051] The electrical equipment installation process involves carefully placing the electrical equipment to be installed in the working area between the two support plates 201, ensuring the parallelism between the equipment and the mounting strip 203, aligning the mounting holes 204 of the equipment with the holes of the mounting strip 203, ensuring the deviation does not exceed ±0.5mm, selecting appropriate M6 stainless steel bolts (recommended torque 8N·m) and tightening them in sequence, using a diagonal tightening sequence to ensure the flatness of the installation. After completing the installation of the main equipment, connect the cables according to the specifications. When the signal cable passes through the opening 202 of the upper support plate 201, it must be protected with a cable sheath.

[0052] During the integrated installation of the display device, select the appropriate mounting panel 501, align the display device with the matrix bayonet 504, and slowly push it in. Use M5 bolts equipped with anti-loosening washers to secure the device, tightening them twice to a torque value of 5 N·m. The signal cable connections use a color-coded identification system. After verifying the correctness of the connection with testing instruments, perform necessary cable bundling and securing.

[0053] The system is sealed and locked. The mounting panel 501 is quickly aligned with the fixing frame 5 via its rear edge precision slot 5011. Four corner locating pins are inserted to ensure accurate positioning. Using a torque screwdriver, the M6 ​​mounting bolts 502 are tightened evenly to the specified torque in a diagonal sequence. Finally, holding the bottom lifting handle of the baffle 6 with both hands, the baffle 6 is pushed upwards steadily at a constant speed (approximately 0.2 m / s) until its top contacts the limiting surface of the upper support plate 201. The elastic plate 404 is then rotated counterclockwise to the locked position. A clear locking sound indicates that the safety locking is complete.

[0054] Furthermore, when performing equipment maintenance, rotate the rotating column 402 and the elastic plate 404, rotate the elastic plate 404 so that its end faces downward, and then push it to the front end of the contact connecting sleeve 401. At this time, the baffle 6 can be lowered into the support groove 106 on the support column 105, exposing the electrical equipment installed on the mounting strip 203, and the maintenance work of the electrical equipment can be carried out. Specific Implementation Example 2

[0056] Please see Figure 1-8Based on the first specific embodiment, the front side of the switch cabinet body 1 adopts a heavy-duty hinge connection mechanism. Each door panel 101 is equipped with two sets of high-strength stainless steel hinges (material is SUS304). The static load capacity of a single hinge is 150kg. The high-transmittance tempered glass observation window integrated on the upper part of the door panel 101 is made of 8mm thick safety glass with a light transmittance of ≥89%. The surface is treated with anti-glare. The bottom height of the observation window is calculated by ergonomics and is precisely set to be 50±2mm higher than the upper support plate 201. This height design ensures that the operator can obtain an unobstructed and complete observation field when standing or sitting. The three-point high-security mechanical door lock 1011 installed on the inner side of the door panel 101 is precision machined by CNC. The lock tongue travel is 15mm and the lock body protection level reaches IP54 standard, which can effectively prevent dust and water.

[0057] Two φ30mm reinforced support columns 105 are symmetrically arranged at the front of the main body 1 of the switch cabinet. They are made of 304 stainless steel (yield strength ≥205MPa) and the surface is mirror polished (roughness Ra≤0.8μm). The top of the support column 105 is machined with a precision support groove 106 by a CNC machine tool. The tolerance between the groove width and the thickness of the baffle 6 is strictly controlled within ±0.1mm, and the fit clearance is ≤0.15mm. The support groove 106 is embedded with a special shock-absorbing rubber pad with a Shore hardness of 60±5 and a compression permanent deformation rate ≤10%, which can effectively absorb the impact energy when the baffle 6 falls. The position of the support groove 106 is calibrated by a laser positioning instrument, and the correspondence accuracy with the falling trajectory of the baffle 6 is ±0.2mm, ensuring that the baffle 6 can be accurately and stably positioned every time.

[0058] Specifically, the electrical isolation operation procedure is as follows: The operator first inserts the special key into the mechanical door lock 1011 on the door panel 101, rotates it to open it, and then pulls the door panel 101 to fully open the front of the switch cabinet. At this time, the lock cylinder 301 located on the lower support plate 201 is in an operable state. The second safety key is then inserted into the lock cylinder 301 and rotated. The linkage rod 302 is rotated through the linkage end of the lock cylinder 301. The inner fixing sleeve 304 is fixed to the inner wall of the switch cabinet body 1 outside the insulating column 103. The inner fixing sleeve 304 is symmetrically fixed with terminal blocks 3041 through its periphery. The ends of the two terminal blocks 3041 that are far apart from each other are respectively connected to the mounting component 2. The electrical equipment installed on the mounting strip 203 is connected so that power is transmitted to the electrical equipment for corresponding reactive power compensation and other processing. The rotational movement of the linkage rod 302 is transmitted to the rotating block 303, so that the L-shaped terminal 3031 inside the rotating block 303 rotates precisely 90 degrees. This action achieves double disconnection: the shorter straight end of the L-shaped terminal 3031 is separated from the second terminal 3041 in the inner fixed sleeve 304, while the longer end is completely disconnected from the first terminal 1031 in the insulating column 103, ensuring that the electrical equipment inside the switch cabinet is completely de-energized. After the de-energization operation is completed, the key is pulled out from the lock cylinder 301 and the system enters the maintenance mode.

[0059] When the maintenance access is opened and operated, after the switch cabinet body 1 enters the maintenance state, the operator must first rotate the elastic plate 404 to make it separate from the contact surface of the baffle 6, and then apply appropriate thrust to make the rotating column 402 move backward in the connecting sleeve 401 until the elastic plate 404 contacts the front end of the connecting sleeve 401. At this time, the baffle 6 automatically falls from the movable opening 205 of the lower support plate 201 and lands smoothly in the support groove 106 of the support column 105. After the baffle 6 is in place, its top is flush with the plane of the lower support plate 201, forming a safe working platform. In this state, maintenance work can be carried out on the electrical equipment installed on the support bar.

[0060] After the system is restored, the operator holds the bottom of the baffle 6 and pushes it upward until the top of the baffle 6 contacts the upper support plate 201. Then, the operator pulls the rotating column 402 in the connecting sleeve 401 to make the limit plate 403 contact the rear end of the connecting sleeve 401. Then, the operator rotates the elastic plate 404 to make it fit tightly against the front side of the baffle 6 to complete the mechanical locking. Finally, the key is reinserted into the lock cylinder 301 and rotated. The linkage rod 302 drives the L-shaped electrical terminal 3031 in the rotating block 303 to reset and restore the electrical connection.

[0061] Furthermore, the safety protection design is reflected in the fact that when the baffle 6 descends to the support groove 106, it completely covers the operating area of ​​the lock cylinder 301, forming a physical isolation barrier. This design effectively prevents misoperation during maintenance, avoids accidental power restoration, and ensures the safety of maintenance personnel. The entire operation process is protected by both mechanical interlocking and physical isolation. Specific Implementation Example 3

[0063] Please see Figure 1 , 2 4, 9, 10. Based on specific embodiments one and two, the installation component 2 includes two parallel support plates 201 fixed inside the switch cabinet body 1. The distance between the two support plates 201 is precisely calculated to ensure structural stability. Each support plate 201 has a vertically penetrating rectangular opening 202. The size of the opening 202 matches the installation requirements of the electrical equipment. The lower support plate 201 has a specially designed movable opening 205 in front of the opening 202. The movable opening 205 is equipped with a baffle 6 that can slide up and down. The fit tolerance between the baffle 6 and the movable opening 205 is controlled within ±0.2mm to ensure smooth movement.

[0064] Behind the openings 202 of the two support plates 201, multiple parallel mounting strips 203 are fixed at equal intervals. These mounting strips 203 are made of high-strength aluminum alloy profiles with a cross-sectional size of 30mm×15mm, which have excellent load-bearing capacity. Mounting holes 204 are equally spaced along the vertical center line on the front side of each mounting strip 203, with a hole spacing of 50mm±0.1mm and a hole diameter of φ6.5mm, which can adapt to the installation requirements of various standard electrical equipment. The mounting holes 204 are laser precision cut and the positional accuracy is controlled within ±0.15mm to ensure the alignment accuracy during installation.

[0065] Specifically, during operation, when the front door panel 101 of the switch cabinet body 1 is closed, a dedicated space for electrical equipment installation is formed between the baffle 6 and the two support plates 201 included in the mounting assembly 2. Inside the switch cabinet body 1 at the bottom of the lower support plate 201, a space is formed for external signal line wiring. At the same time, with the cooperation of the fixing frame 5 and the mounting panel 501, the display position of the display device is formed. During operation, the data displayed by the display device is presented to inspection and maintenance personnel through the glass plate 102. This makes the switch cabinet body 1 divided into separate functional spaces for wiring, electrical equipment installation, and display device installation, ensuring that the functions of each functional space within the switch cabinet body 1 are distinct and preventing confusion of equipment functional spaces during operation.

[0066] 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.

[0067] 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. Switchgear, including The main body of the switch cabinet (1) has an insulating column (103) fixed through the rear side of the main body of the switch cabinet (1), and a power connection column (1031) is symmetrically fixed through the insulating column (103). The mounting assembly (2) includes two parallel support plates (201) fixed inside the switch cabinet body (1), and both support plates (201) have vertically through openings (202). The lower support plate (201) has an opening (205) in front of the opening (202), and a baffle (6) is movably connected inside the opening (205). The front side of the switch cabinet body (1) is hinged with a door panel (101), and a glass plate (102) is fixed through the upper part of the door panel (101). The height of the glass plate (102) is higher than the support plate (201) located above. A door lock (1011) is fixed through one side of the door panel (101). The power connection assembly (3) includes a lock cylinder (301) fixed at the front edge of the bottom of the lower support plate (201). A linkage rod (302) is fixed at the linkage end of the lock cylinder (301). A rotating block (303) is fixed at the rear end of the linkage rod (302). An inner fixing sleeve (304) is sleeved on the periphery of the rotating block (303). The inner fixing sleeve (304) is fixed on the rear side of the inner wall of the switch cabinet body (1). Locking components (4) are symmetrically fixed on the upper part of the periphery of the lock cylinder (301). Two locking components (4) include connecting sleeves (401) fixed on the upper periphery of the lock cylinder (301), and each connecting sleeve (401) is movably connected to a rotating pin (402), and the front end of the rotating pin (402) is fixed with an elastic plate (404). A fixed frame (5) is fixed in front of the opening (202) at the top of the support plate (201) above. A mounting panel (501) is movably connected inside the fixed frame (5). A slot (5011) is provided at the rear edge of the mounting panel (501). The slot (5011) is engaged with the front side of the fixed frame (5). A rectangular array of slots (504) is provided inside the mounting panel (501). The mounting panel (501) outside the slots (504) is... The mounting panel (501) has a rectangular array of mounting screw holes (505) at each corner outside the bayonet (504). Each corner of the front side of the mounting panel (501) has a socket (503). Each socket (503) is connected to the slot (5011). Each socket (503) is inserted with a mounting bolt (502). The mounting bolt (502) passes through the mounting panel (501) and is threaded into the fixing frame (5).

2. The switchgear according to claim 1, characterized in that: The inner fixing sleeve (304) is fixed on the inner wall of the switch cabinet body (1) outside the insulating column (103), and the inner fixing sleeve (304) is symmetrically fixed with two terminal posts (3041) through the periphery.

3. The switchgear according to claim 1, characterized in that: The front part of the bottom surface of the switch cabinet body (1) is symmetrically fixed with support columns (105). The top of each of the two support columns (105) is provided with a support groove (106). The support groove (106) corresponds to the position of the baffle (6). The lower part of the rear side of the switch cabinet body (1) is provided with several equally spaced wire holes (104).

4. The switchgear according to claim 1, characterized in that: The mounting assembly (2) also includes mounting strips (203) and mounting holes (204). Several mounting strips (203) for installing electrical equipment are fixed together on the rear side of the openings (202) in the two support plates (201). The mounting strips (203) are arranged parallel to each other. The mounting strips (203) have mounting holes (204) that are equally spaced along the center line in the vertical direction on the front side.

5. The switchgear according to claim 1, characterized in that: The rotating block (303) has L-shaped terminals (3031) symmetrically fixed at the rear. The rear ends of the two L-shaped terminals (3031) abut against the front end of the first terminal (1031). The ends of the two L-shaped terminals (3031) near the front side are in contact with the two second terminals (3041) inside the inner fixing sleeve (304).

6. An interlocking device for a switchgear circuit breaker, comprising the switchgear as described in any one of claims 1-5, characterized in that: The elastic plate (404) abuts against the front side of the baffle (6) located below the lower support plate (201), and the baffle (6) is supported on the periphery of the rotating column (402). Each rotating column (402) has a limit plate (403) fixed at its rear end, and the limit plate (403) abuts against the front end of the connecting sleeve (401).

Images