Switch cabinet and interlocking device for circuit breaker of switch cabinet

Abstract

The invention discloses a switch cabinet and an interlocking device for a switch cabinet circuit breaker, and relates to the technical field of switch cabinets. The switch cabinet comprises a switch cabinet body, an insulating column is fixed to the rear side of the switch cabinet body in a penetrating mode, and first power connection columns are symmetrically fixed in the insulating column in a penetrating mode; the mounting assembly comprises two parallel supporting plates fixed in the switch cabinet main body, and baffle plates are movably connected in movable openings in the supporting plates; the power connection assembly comprises a lock cylinder fixed to the edge of the front side of the bottom of the lower supporting plate, and locking assemblies are symmetrically fixed to the upper portion of the peripheral side of the lock cylinder; each locking assembly comprises a connecting sleeve fixed to the upper portion of the peripheral side of the lock cylinder, a rotating column is movably connected into each connecting sleeve, and an elastic plate is fixed to the front end of each rotating column; the fixing frame is fixed in front of the opening in the top of the upper supporting plate. According to the invention, the baffle plate is arranged in the switch cabinet, and the power connection assembly is blocked by the baffle plate during maintenance, so that misoperation and wrong power connection of an operator are well prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of switch cabinets, and in particular relates to a switch cabinet and an interlocking device for a circuit breaker of the switch cabinet. Background Art

[0002] A switchgear is a complete set of power distribution equipment that integrates electrical equipment such as circuit breakers, disconnectors, protection devices, and measuring instruments. It is mainly used for power distribution, circuit control, and system protection in power systems. Its casing is usually made of metal or insulating materials and has a certain degree of protection (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 electricity to different branches according to demand, optimizing the power supply structure, circuit control, and realizing load current on-off management through circuit breakers, disconnectors, and other equipment. System protection: quickly cut off the circuit in the event of faults such as short circuits and overloads to ensure the safety of the power grid and equipment.

[0003] The circuit breakers in the switchgear are usually equipped with mechanical or electrical interlock devices, which are key structures to ensure operational safety. Their core function is to prevent misoperation (such as opening and closing the disconnector under load, accidentally entering the live compartment, etc.), thereby avoiding personal injury or equipment damage. The main functions of the interlock device include: preventing misoperation of the disconnector. When the circuit breaker is in the closed state, the mechanical interlock will prevent the disconnector from opening or closing, preventing the cabinet door from opening by mistake; when the circuit breaker is not opened, the interlock mechanism will lock the cabinet door to ensure that the operator cannot open the live compartment; the grounding protection interlock prohibits closing the grounding switch in the live state to avoid the risk of short circuit. When the grounding switch is closed, the circuit breaker is prohibited from closing, ensuring maintenance safety;

[0004] After searching existing public documents, the patent document with announcement number CN110993426A discloses a circuit breaker interlocking device for a solid insulated switch cabinet, including a cabinet body, in which a half-shaft for opening and closing, and an isolating operating shaft are rotatably arranged; a panel is provided on the cabinet body, and a closing window, an opening window and an operating window are provided on the panel; a baffle is slidably provided on the panel, and an operating hole is provided on the baffle; a power connection linkage and an isolating linkage are provided in the cabinet body, and the baffle extends toward the closing window to form a baffle; a lock pin is passed through the lower edge of the cabinet body, and a locking plate is connected to the lock pin, and a reset spring is sleeved on the lock pin, and the reset spring is in contact between the cabinet body and the locking plate; a lock pin limiter is also provided in the cabinet body, and a locking protrusion is extended from the locking plate toward the baffle, and a locking rib is formed on the edge of the baffle, and the locking protrusion is in contact with the locking rib to form a limit for the sliding of the baffle. 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 patents still have the following drawbacks in actual use:

[0006] In actual use, mechanical interlocking is directly used. After opening the cabinet, the power supply line and the equipment in the switch cabinet are disconnected for maintenance. However, during the maintenance process, the operator may forget to remove the key, causing the key to be accidentally touched during construction, and the power supply is restored after turning it, causing safety hazards during maintenance operations, resulting in safety accidents and affecting the operational safety of the switch cabinet. Summary of the Invention

[0007] The present invention aims to provide a switch cabinet and an interlocking device for a circuit breaker in the switch cabinet. By providing a switch cabinet body, a mounting assembly, a power connection assembly, a locking assembly, a fixing frame, and a baffle, the present invention solves the problem that a circuit breaker in the switch cabinet may be energized after power is cut off due to an operator's mistaken operation to cause a safety accident.

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

[0009] The present invention relates to a switch cabinet and an interlocking device for a switch cabinet circuit breaker, comprising a switch cabinet body, an insulating column fixedly extending through the rear side of the switch cabinet body, and a power connection column symmetrically fixedly extending through the insulating column; a mounting assembly comprising two mutually parallel support plates fixed in the switch cabinet body, and openings are vertically provided in both support plates, a movable opening is provided in front of the opening on the lower support plate, and a baffle is movably connected in the movable opening; a power connection assembly comprising a lock core fixed at the bottom front edge of the lower support plate, a linkage end of the lock core being fixed with a linkage rod, a rear end of the linkage rod being fixed with a rotating block, a peripheral side of the rotating block being sleeved with an inner fixing sleeve, the inner fixing sleeve being fixed to the rear side surface of the inner wall of the switch cabinet body, and a locking assembly being symmetrically fixed to the upper part of the peripheral side of the lock core; two locking assemblies The components include a connecting sleeve fixed to the upper part of the peripheral side of the lock cylinder, each of the connecting sleeves is movably connected with a rotating column, and an elastic plate is fixed to the front end of the rotating column; a fixing frame is fixed to the 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 and arranged in it through the switch cabinet main body. The switch cabinet is divided into three functional spaces by the two support plates included in the installation component, the lower wiring is formed, the electrical equipment is installed between the two support plates, and the upper fixed fixing frame is fixed to the installation panel of the display device. When the locking component is working, after locking, the electrical equipment in the switch cabinet is powered on, the fixing frame fixes the installation panel of the display device therein, and the electrical equipment between the two support plates is shielded in the switch cabinet main body by the baffle.

[0010] Furthermore, a door panel is hingedly connected to the front side of the switch cabinet body, a glass panel is fixed through the upper inner part of the door panel, the height of the glass panel is higher than the support plate located above, and a door lock is fixed through one side of the door panel. When the switch cabinet body is in operation, its front opening position is closed by the door panel, and the glass panel displays the data and other information displayed on the display device in the switch cabinet body, and the door panel is locked on the switch cabinet body 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, and the inner fixing sleeve has a second terminal fixed symmetrically through the circumference thereof. When the inner fixing sleeve is in operation, the second terminal inside it extends out of the inner fixing sleeve, and the end of the second terminal away from the inner fixing sleeve is connected to the equipment installed in the installation assembly inside the switch cabinet body.

[0012] Furthermore, support columns are symmetrically fixed to the front of the inner bottom surface of the switch cabinet body, and support grooves are provided at the top of the two support columns, which correspond to the positions of the baffles. A number of equally spaced wire holes are provided at the lower part of the rear side of the switch cabinet body. The support grooves at the top of the support columns in the switch cabinet body are movably connected to the baffles, and the baffles are suspended in the switch cabinet body. The wire holes in the switch cabinet body pass signal lines and other lines.

[0013] Furthermore, the mounting assembly also includes mounting bars and mounting holes. The rear sides of the openings in the two support plates are jointly fixed with several mounting bars for mounting electrical equipment, and the mounting bars are arranged parallel to each other. The front sides of the mounting bars are provided with mounting holes at equal intervals along the center line in the vertical direction. The mounting bars and the mounting holes provided on the mounting bars included in the mounting assembly provide the electrical equipment to be installed on the mounting bars by fitting it to the front side of the mounting bars and then screwing the mounting bolts into the mounting holes for installation.

[0014] Furthermore, L-shaped connecting posts are symmetrically fixed to the rear part of the rotating block, and the rear ends of the two L-shaped connecting posts are in contact with the front end of the first connecting post, and the ends of the two L-shaped connecting posts close to the front side are in contact with the two second connecting posts in the inner fixed sleeve. After the L-shaped connecting posts in the rotating block are in contact with the first connecting post, the L-shaped connecting posts are electrically connected to the first connecting post. At this time, the L-shaped connecting posts are just in contact with the second connecting post, ensuring that the power connection operation in the switch cabinet body is carried out well during work. After further power connection, after rotating the rotating block, the L-shaped connecting posts are separated from the first connecting post and the second connecting post, and the switch cabinet body is further separated.

[0015] Furthermore, an installation panel is movably connected in the fixed frame, and a card slot is provided at the rear edge of the installation panel. The card slot is connected to the front side of the fixed frame. When the fixed frame is working, the card slot on the installation panel is connected to the fixed frame, so that the fixed frame and the installation panel are combined together during work.

[0016] Furthermore, the mounting panel is provided with bayonet holes in a rectangular array, and the mounting panels outside the bayonet holes are provided with mounting screw holes in a rectangular array, and the mounting screw holes are distributed at each corner outside the bayonet holes, and each corner on the front side of the mounting panel is provided with a socket, and each of the sockets is connected to the slot, and a mounting bolt is inserted through each socket, and the mounting bolts are threaded into the fixing frame after passing through the mounting panel. When the mounting panel is working, the bayonet holes thereon are movably connected to the display device, and the mounting bolts are inserted into the display device and then screwed into the mounting screw holes to install the display device on the mounting panel. The mounting bolts are inserted into the mounting bolts on the mounting panel and then screwed into the fixing frame, so that the combination between the fixing frame and the mounting panel is completed during work.

[0017] Furthermore, the elastic plate abuts against the front side of the baffle located below the lower support plate, and the baffle support is arranged on the circumference of the rotating column. The rear end of each rotating column is fixed with a limit plate, and the limit plate abuts against the front end of the connecting sleeve. When the elastic plate is working, it is arranged on the circumference of the rotating column so that the limit plate can limit the operation and rotate the elastic plate to press on the baffle to prevent the baffle from falling during work.

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

[0019] The present invention solves the problem that a circuit breaker in the switch cabinet may cause a safety accident due to an operator's mistake in reenergizing the circuit breaker after the power is cut off by arranging a switch cabinet body, an installation component, a power connection component, a locking component, a fixing frame and a baffle. The maintenance passage is opened and operated. After the switch cabinet body enters the maintenance state, the operator needs to first rotate the elastic plate to separate it from the baffle contact surface, and then apply appropriate thrust to move the rotating column backward in the connecting sleeve until the elastic plate contacts the front end of the connecting sleeve. At this time, the baffle automatically falls from the movable opening of the lower support plate and lands smoothly in the support groove of the support column, blocking the circuit breaker. After the plate is in place, its top remains flush with the plane of the supporting plate below, forming a safe working platform. In this state, electrical equipment installed on the support bar can be inspected and repaired. In this state, the lock cylinder of the power connection component is blocked by the baffle. The operator needs to push the baffle up to expose the lock cylinder before inserting the key into the lock cylinder and restoring power supply. After the baffle rises, it can be locked by the locking structure, and the electrical equipment in the switch cabinet body will be well shielded. The operator cannot touch the energized electrical equipment in the switch cabinet, which can well ensure the safety of power-on operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A perspective view of the assembly structure of the switchgear and the interlocking device for the switchgear circuit breaker;

[0022] Figure 2 It is a structural stereogram of the switch cabinet body;

[0023] Figure 3 It is a three-dimensional diagram of the structure after the insulation column is partially cut away;

[0024] Figure 4 It is a structural stereogram of the installation components;

[0025] Figure 5 It is a structural stereogram of the power connection assembly;

[0026] Figure 6 It is a structural stereogram of the internal fixation sleeve;

[0027] Figure 7 This is a three-dimensional diagram of the structure after the transfer block is cut open;

[0028] Figure 8 It is a structural perspective view of the locking component after partial cutaway;

[0029] Figure 9 It is a three-dimensional diagram of the structure after the fixing frame and the installation panel are combined;

[0030] Figure 10 This is a three-dimensional diagram of the rear structure of the installation panel.

[0031] Reference numerals:

[0032] 1. Switchgear body; 101. Door panel; 1011. Door lock; 102. Glass panel; 103. Insulation column; 1031. Power connection column 1; 104. Wire hole; 105. Support column; 106. Support slot;

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

[0034] 3. Power connection assembly; 301. Lock cylinder; 302. Link rod; 303. Rotating block; 3031. L-shaped power connection post; 304. Internal fixing sleeve; 3041. Terminal 2;

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

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

[0037] 6. Baffle. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention. Specific embodiment 1

[0040] See also Figure 1-10The present invention is a switch cabinet and an interlocking device for a switch cabinet circuit breaker, comprising a switch cabinet body 1, an insulating column 103 is fixed through the rear side of the switch cabinet body 1, and a power connection column 1031 is fixed symmetrically through the insulating column 103; an installation component 2, comprising two mutually parallel support plates 201 fixed in the switch cabinet body 1, and both support plates 201 are vertically penetrated to form an opening 202, a movable opening 205 is formed in front of the opening 202 on the lower support plate 201, and a baffle 6 is movably connected to the movable opening 205; a power connection component 3, comprising a fixed The lock core 301 is located at the bottom front edge of the lower support plate 201, and the linkage end of the lock core 301 is fixed with a connecting rod 302. The rear end of the connecting rod 302 is fixed with a rotating block 303. The peripheral side of the rotating block 303 is sleeved with an inner fixing sleeve 304. The inner fixing sleeve 304 is fixed to the rear side of the inner wall of the switch cabinet body 1. The upper part of the peripheral side of the lock core 301 is symmetrically fixed with locking components 4; the two locking components 4 include a connecting sleeve 401 fixed to the upper part of the peripheral side of the lock core 301, and each connecting sleeve 401 is movably connected with a rotating column 402. The front end of the rotating column 402 is fixed with Elastic plate 404; fixed frame 5, a fixed frame 5 is fixed in front of the opening 202 at the top of the upper support plate 201, the front side of the switch cabinet body 1 is hinged with a door panel 101, a glass panel 102 is fixed through the upper part of the door panel 101, the height of the glass panel 102 is higher than the support plate 201 located above, a door lock 1011 is fixed through one side of the door panel 101, and support columns 105 are symmetrically fixed to the front of the bottom surface of the switch cabinet body 1. The tops of the two support columns 105 are both provided with support grooves 106, which correspond to the positions of the baffle 6. The switch cabinet body 1 A plurality of equally spaced wire holes 104 are provided at the lower portion of the rear side. The mounting assembly 2 further includes mounting strips 203 and mounting holes 204. The rear sides of the openings 202 in the two support plates 201 are jointly fixed with a plurality of mounting strips 203 for mounting electrical equipment. The mounting strips 203 are arranged parallel to each other. The front sides of the mounting strips 203 are uniformly spaced along the vertical center line and have mounting holes 204 formed therethrough. A mounting panel 501 is movably connected to the fixing frame 5. A slot 5011 is provided at the rear edge of the mounting panel 501. The slot 5011 is snap-fitted to the front side of the fixing frame 5.

[0041] The mounting panel 501 is provided with a rectangular array of bayonet holes 504, and the mounting panel 501 outside the bayonet holes 504 is provided with mounting screw holes 505 in a rectangular array. The mounting screw holes 505 are arranged at each corner outside the bayonet holes 504 in a step-by-step manner. Each corner of the front side of the mounting panel 501 is provided with a socket 503, and each socket 503 is connected to the slot 5011. A mounting bolt 502 is inserted through each socket 503. After passing through the mounting panel 501, the mounting bolt 502 is threadedly connected to the fixing frame 5. 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 circumference of the rotating column 402. The rear end of each rotating column 402 is fixed with a limit plate 403, and the limit plate 403 abuts against the front end of the connecting sleeve 401.

[0042] A number of advanced technical solutions are used to achieve reliable installation and safe operation of electrical equipment. The overall design of the device fully considers installation convenience, operational safety and maintenance convenience. The specific technical features are as follows:

[0043] In terms of the structure of the switch cabinet body 1, the switch cabinet 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 and has excellent insulation performance (insulation resistance ≥ 1000MΩ) and mechanical strength (bending strength ≥ 120MPa). Two groups of high-conductivity connection posts 1031 are symmetrically arranged inside the insulating column 103. The surface is specially silver-plated with a contact resistance of ≤ 0.5mΩ to ensure the reliability of the electrical connection. The frame of the switch cabinet body 1 is integrally bent and formed using 1.5mm high-quality cold-rolled steel plate. The surface is phosphating and then electrostatically sprayed with a coating thickness of ≥ 60μm, which not only ensures structural strength but also improves weather resistance. The rear ends of the two connection posts 1031 are respectively electrically connected and fixed to the two connection electrodes of the power line;

[0044] The internal support system adopts an innovative design. Two reinforced support plates 201 are set in parallel inside the switch cabinet body 1. The 3mm thick Q235 steel plate is laser cut to form a vertical through-opening 202 with an accuracy of ±0.1mm. The adjustable movable opening 205 and 304 stainless steel baffle 6 set on the lower support plate 201 form a flexible installation channel. The surface roughness of the baffle 6 is Ra ≤ 1.6μm to ensure smooth sliding. The support plate 201 and the switch cabinet body 1 are fixed by 8-point welding. The welding strength has been tested to reach more than 4000N.

[0045] The power connection component 3 system uses a precision mechanical linkage mechanism, including a copper alloy lock cylinder 301 device and a transmission mechanism. The lock cylinder 301 is connected to the rear side rotary block 303 through a φ8mm high-strength linkage rod 302. The engineering plastic internal fixing sleeve 304 set on the outside of the rotary block 303 has self-lubricating properties and a friction coefficient of ≤0.15. The two sets of high-precision locking components 4 include an aluminum alloy connecting sleeve 401, a chrome-plated rotary 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 rotary column 402 ensures a positioning accuracy of ±0.05mm.

[0046] The door observation system is designed with a focus on practicality and safety. The heavy-duty hinged door panel 101 uses a 2mm steel 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 level and a lock life test of ≥10,000 opening and closing cycles. The door panel 101 is designed to open and close at an angle of 120°, allowing operators to observe the internal equipment status from all angles.

[0047] The auxiliary support structure has been carefully designed. The two sets of φ30mm solid steel support columns 105 at the bottom have support grooves 106 on top embedded with shock-absorbing rubber pads with a Shore hardness of 60±5. The 12 φ25mm wire holes 104 at the rear are processed with a flanging process with a flanging height of 2mm to effectively protect the cable insulation layer.

[0048] The standardized installation system embodies industrial design concepts. The positional tolerance of the φ6.5mm mounting holes 204, evenly spaced on 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 and M5 mounting screw holes 505 enable the installation of various devices. The matching tolerance of the φ6mm jacks 503 in the four corners and the M6 ​​stainless steel mounting bolts 502 is controlled to the H8 / f7 level, ensuring easy disassembly and assembly.

[0049] Specifically, during the equipment installation preparation phase, the operator first uses a special key to unlock the three-point safety door lock 1011 on the door panel 101. The lock adopts a two-way rotation opening mechanism. It can be unlocked by rotating it 120° clockwise. The door panel 101 is slowly opened to the maximum opening angle (120°). At this time, the internal space of the switch cabinet body 1 can be fully exposed. After confirming the safety by observing the status of the internal components, the operator holds the handle of the elastic plate 404 with his hand and rotates it 90° clockwise to completely separate the elastic plate 404 from the contact surface of the baffle 6.

[0050] During the installation channel opening operation, use appropriate force (about 50N) to push the elastic plate 404 forward, driving the rotating column 402 to move smoothly backward in the inner fixing sleeve 304. When a "click" sound is heard (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 is automatically unlocked. The operator holds the baffle 6, and the baffle 6 falls smoothly under the action of gravity, and finally accurately embeds 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 maintains a height consistency of ±0.2mm with the plane of the support plate 201, forming a complete equipment installation platform;

[0051] The electrical equipment installation process is to carefully place the electrical equipment to be installed in the work area between the two support plates 201. Pay attention to maintaining the parallelism between the equipment and the mounting bar 203. Align the equipment mounting holes 204 with the holes in the mounting bar 203, ensuring that the deviation does not exceed ±0.5mm. Select appropriate M6 stainless steel bolts (recommended torque 8N·m) and tighten them in sequence. Use a diagonal tightening sequence to ensure installation flatness. After completing the main equipment installation, connect the cables according to the specifications. Use cable sheaths to protect the signal cables when passing through the opening 202 of the upper support plate 201.

[0052] During the display device integration installation, 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 lock washers to secure the device, tightening them twice to a torque of 5 N·m. Signal cable connections use a color-coded identification system. After verifying the correctness of the connection with a test instrument, perform necessary cable bundling and fixation.

[0053] The system is closed and locked. The mounting panel 501 is quickly aligned with the fixed frame 5 through the precision slot 5011 on its rear edge. The four corner positioning pins are inserted to ensure accurate positioning. The M6 ​​mounting bolts 502 are tightened evenly in diagonal order to the specified torque using a torque screwdriver. Finally, hold the lifting handle at the bottom of the baffle 6 with both hands and push the baffle 6 upward steadily at a constant speed (about 0.2m / s) until its top contacts the limit surface of the upper support plate 201. Rotate the elastic plate 404 counterclockwise to the locked position. A clear locking sound indicates that the safety locking is completed.

[0054] Furthermore, when performing maintenance on the equipment, rotate the rotating column 402 and the elastic plate 404, rotate the elastic plate 404 to the point where the 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 bar 203, and performing maintenance work on the electrical equipment. Specific embodiment 2

[0056] See also Figure 1-8Based on the first embodiment, the front side of the switchgear body 1 uses a heavy-duty hinge connection mechanism. Each door panel 101 is equipped with two sets of high-strength stainless steel hinges (made of SUS304). The static load capacity of a single hinge reaches 150kg. The high-transmittance tempered glass observation window integrated on the upper part of the door panel 101 uses 8mm thick safety glass with a transmittance of ≥89% and an anti-glare surface treatment. The bottom height of the observation window is precisely set 50±2mm above the upper support plate 201 based on ergonomic calculations. This height design ensures that the operator has an unobstructed and complete observation field of view when standing or sitting. The three-point high-security mechanical door lock 1011 installed on the inside of the door panel 101 is precision-machined by CNC, with a lock bolt travel of 15mm and a lock body protection level that meets the IP54 standard, which is effectively dustproof and waterproof.

[0057] Two φ30mm reinforced support columns 105 are symmetrically arranged at the front of the switch cabinet body 1. They are made of 304 stainless steel (yield strength ≥205MPa) and have a mirror polished surface (roughness Ra≤0.8μm). The top of the support column 105 is processed with a precision support groove 106 by a CNC machine tool. The matching tolerance of the groove width and the thickness of the baffle 6 is strictly controlled within ±0.1mm, and the fitting 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 of ≤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 locator, and the corresponding 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 process 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, and then pulls the door panel 101 to fully open the front side 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 inserted into the lock cylinder 301 and rotated. The linkage end of the lock cylinder 301 drives the linkage rod 302 to rotate. 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 the second terminal 3041 on the circumference. The ends of the two terminal 2 3041 away from each other are respectively connected to the installation component 2 The electrical equipment installed on the mounting bar 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 connecting rod 302 is transmitted to the rotating block 303, causing the L-shaped connecting post 3031 in the rotating block 303 to rotate accurately 90 degrees. This action achieves a double disconnection: the shorter straight end of the L-shaped connecting post 3031 is separated from the second terminal 3041 in the internal fixing sleeve 304, and the longer end is completely separated from the first terminal 1031 in the insulating post 103, ensuring that the electrical equipment inside the switch cabinet is completely de-energized. After the power-off operation is completed, the key is pulled out of the lock cylinder 301, and the system enters the maintenance mode.

[0059] To open and operate the maintenance passage, after the switch cabinet body 1 enters the maintenance state, the operator needs to first rotate the elastic plate 404 to separate it from the contact surface of the baffle 6, and then apply appropriate thrust to move the rotating column 402 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 remains 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] The system resumes operation. After the inspection is completed, 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, and then rotates the elastic plate 404 to make it close to 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 L-shaped connecting post 3031 in the rotating block 303 is reset through the connecting rod 302 to 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 blocks the operating area of ​​the lock cylinder 301, forming a physical isolation barrier. This design effectively prevents misoperation during maintenance and avoids accidental power restoration, ensuring the safety of maintenance personnel. The entire operation process is dually protected by mechanical interlocking and physical isolation. Specific embodiment three

[0063] See also Figure 1 、 2 , 4, 9, 10, based on the specific embodiment 1 and the specific embodiment 2, the installation component 2 includes two support plates 201 fixed in parallel in the switch cabinet body 1. The distance between the two support plates 201 is precisely calculated to ensure structural stability. The support plates 201 are each processed with a vertically penetrating rectangular opening 202. The size of the opening 202 matches the installation requirements of the electrical equipment. The support plate 201 located below is specially designed with a movable opening 205 in front of the opening 202. A baffle 6 that can slide up and down is assembled in the movable opening 205. The matching tolerance between the baffle 6 and the movable opening 205 is controlled within ±0.2mm to ensure smooth movement;

[0064] On the rear side of the opening 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 and excellent load-bearing performance. The front side of each mounting strip 203 is provided with mounting holes 204 at equal intervals along the vertical center line. The hole pitch is 50mm±0.1mm and the hole diameter is φ6.5mm, which can adapt to the installation requirements of various standard electrical equipment. The mounting holes 204 are precisely cut by laser, and the position accuracy is controlled within ±0.15mm to ensure the accuracy of alignment during installation.

[0065] Specifically, during operation, when the door panel 101 on the front side of the switch cabinet body 1 is closed, a special space for installing electrical equipment is formed between the baffle 6 and the two support plates 201 included in the installation assembly 2, and a space for threading and routing external signal lines is formed in the switch cabinet body 1 at the bottom of the support plate 201 below. At the same time, the fixed frame 5 and the installation panel 501 cooperate to form a display position for the display device, and the data displayed on the display device is displayed to the inspection and maintenance personnel through the glass plate 102 during operation, so that separate functional spaces for routing, installing electrical equipment, installing display equipment, etc. are separated in the switch cabinet body 1, ensuring that the functions of each functional space in the switch cabinet body 1 are distinct, and preventing confusion in the functional space of equipment during operation.

[0066] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0067] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. Switchgear, including A switch cabinet body (1), wherein an insulating column (103) is fixed through the rear side of the switch cabinet body (1), and a first power connection column (1031) is fixed symmetrically through the inside of the insulating column (103); The mounting assembly (2) comprises two mutually parallel support plates (201) fixed in the switch cabinet body (1), and both of the support plates (201) are provided with openings (202) vertically extending therethrough, a movable opening (205) is provided in front of the opening (202) on the lower support plate (201), and a baffle (6) is movably connected to the movable opening (205); The power connection assembly (3) comprises a lock core (301) fixed at the bottom front edge of the lower support plate (201), a linkage end of the lock core (301) is fixed with a linkage rod (302), a rear end of the linkage rod (302) is fixed with a rotating block (303), a peripheral side of the rotating block (303) is sleeved with an inner fixing sleeve (304), the inner fixing sleeve (304) is fixed to the rear side of the inner wall of the switch cabinet body (1), and a locking assembly (4) is symmetrically fixed to the upper part of the peripheral side of the lock core (301); Two locking assemblies (4) include a connecting sleeve (401) fixed to the upper portion of the peripheral side of the lock core (301), each connecting sleeve (401) is movably connected to a rotating column (402), and an elastic plate (404) is fixed to the front end of the rotating column (402); A fixing frame (5) is fixed in front of the opening (202) at the top of the upper support plate (201).

2. The switch cabinet according to claim 1, characterized in that: A door panel (101) is hingedly connected to the front side of the switch cabinet body (1); a glass panel (102) is fixed through the upper portion of the door panel (101); the height of the glass panel (102) is higher than the support plate (201) located above; and a door lock (1011) is fixed through one side of the door panel (101).

3. The switch cabinet 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 a second terminal (3041) is fixed symmetrically through the circumference of the inner fixing sleeve (304).

4. The switch cabinet according to claim 1, characterized in that: Support columns (105) are symmetrically fixed to the front of the inner bottom surface of the switch cabinet body (1), and the top ends of the two support columns (105) are both provided with support grooves (106), and the support grooves (106) correspond to the positions of the baffles (6). A plurality of equally spaced wire holes (104) are provided at the lower portion of the rear side of the switch cabinet body (1).

5. The switch cabinet according to claim 1, characterized in that: The mounting assembly (2) further comprises mounting bars (203) and mounting holes (204); a plurality of mounting bars (203) for mounting electrical equipment are fixed to the rear sides of the openings (202) in the two support plates (201); the mounting bars (203) are arranged parallel to each other; and the front sides of the mounting bars (203) are provided with mounting holes (204) at equal intervals along the center line in the vertical direction.

6. The switch cabinet according to claim 1, characterized in that: L-shaped connecting posts (3031) are symmetrically fixed to the rear of the rotating block (303), the rear ends of the two L-shaped connecting posts (3031) are in contact with the front end of the first connecting post (1031), and the ends of the two L-shaped connecting posts (3031) close to the front side are in contact with the two second connecting posts (3041) in the inner fixing sleeve (304).

7. The switch cabinet according to claim 1, characterized in that: A mounting panel (501) is movably connected in the fixing frame (5), and a card slot (5011) is provided at the rear edge of the mounting panel (501), and the card slot (5011) is snap-connected to the front side of the fixing frame (5).

8. The switch cabinet according to claim 7, characterized in that: The mounting panel (501) is provided with bayonet holes (504) in a rectangular array, and the mounting panel (501) outside the bayonet holes (504) is provided with mounting screw holes (505) in a rectangular array. The mounting screw holes (505) are arranged at each corner outside the bayonet holes (504). Each corner on the front side of the mounting panel (501) is provided with a socket (503), and each socket (503) is connected to the slot (5011). A mounting bolt (502) is inserted through each socket (503), and the mounting bolt (502) is threadedly connected to the fixing frame (5) after passing through the mounting panel (501).

9. An interlocking device for a switchgear circuit breaker, comprising the switchgear according to any one of claims 1 to 8, 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 and arranged on the circumference of the rotating column (402). A limiting plate (403) is fixed to the rear end of each rotating column (402), and the limiting plate (403) abuts against the front end of the connecting sleeve (401).

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