Electric power cabinet with automatic fire extinguishing device

Abstract

The invention relates to the technical field of electrical equipment, in particular to an electric power cabinet with an automatic fire extinguishing device, which comprises a main cabinet body, a cabinet door, an automatic fire extinguishing device, an automatic fire extinguishing device, an automatic fire extinguishing device, an automatic fire extinguishing device, an automatic fire extinguishing device and a power supply device, and is characterized in that the main cabinet body is internally provided with a plurality of circuit breaker mounting racks; the cabinet door is rotationally connected with the main cabinet body through a hinge arranged on the vertical side, vertical guide rails are symmetrically arranged on the left side and the right side of the cabinet door, and vertical screws are arranged on the inner sides of the vertical guide rails in parallel. The lifting fire extinguishing frame capable of sliding up and down moves to the front of the fire mounting frame along the guide rail, the horizontal spray head directionally sprays fire to the core area of a fire point in a close range, the fire point can be rapidly and accurately positioned, fire extinguishing is conducted by precisely spraying a fire extinguishing agent, and the fire extinguishing efficiency is improved; in addition, local treatment can be conducted on specific fire points, unnecessary fire extinguishing agent use amount is reduced, and meanwhile the safety of equipment in surrounding unaffected areas is protected to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to an electric power cabinet with an automatic fire extinguishing device. Background Art

[0002] Power cabinets are core infrastructure in modern power transmission and distribution, automation control, and data centers. They typically contain electrical equipment such as circuit breakers, contactors, and a large number of cables. Under long-term high-load operation, short circuits, or external environmental factors, the cabinets are prone to local overheating, arcing, and even open flames, posing a fire risk. Because the cabinets are relatively closed, contain a high density of equipment, and are usually unattended, once a fire breaks out, it can spread extremely quickly. Therefore, equipping power cabinets with efficient and reliable automatic fire extinguishing devices to achieve early detection and rapid suppression of fires is a key protective measure to ensure safe equipment operation and reduce fire losses.

[0003] At present, the automatic fire extinguishing used inside power cabinets is generally a gas fire extinguishing system or aerosol fire extinguishing device based on the principle of full flooding fire extinguishing. After the gas or aerosol full flooding system is triggered, it needs to release a sufficient amount of fire extinguishing agent into the entire enclosed space of the cabinet to achieve the designed concentration. Its fire extinguishing effect depends on the sealing of the cabinet. In actual application, it is difficult to completely seal the cable inlets and outlets, and it is impossible to distinguish the location of the fire source, resulting in large agent consumption and high cost. It may also cause unnecessary pollution or corrosion risks to sensitive electronic equipment in non-fire areas. The fire extinguishing agent cannot be accurately delivered to the actual fire point, resulting in delayed fire extinguishing and low efficiency. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to propose an electric cabinet with an automatic fire extinguishing device to solve the problem that the fire extinguishing structure of the current electric cabinet needs to release a sufficient amount of fire extinguishing agent into the entire enclosed space of the cabinet to achieve the designed concentration. The fire extinguishing agent cannot be accurately delivered to the actual fire point, resulting in delayed fire extinguishing, low efficiency, and high agent consumption.

[0005] Based on the above objectives, the present invention provides a power cabinet with an automatic fire extinguishing device, comprising a main cabinet body, wherein a plurality of circuit breaker mounting brackets are arranged inside the main cabinet body, and further comprising: A cabinet door is arranged outside the front opening of the main cabinet body, and is rotatably connected to the main cabinet body through a hinge arranged vertically on one side. Vertical guide rails are symmetrically arranged on the left and right sides of the cabinet door, and vertical screws are arranged parallel to the inner sides of the vertical guide rails. The shaft ends of the vertical screws are connected to the drive motor; A lifting fire extinguishing frame is arranged on the outer side of the vertical guide rail, the lifting fire extinguishing frame is slidably connected to the vertical guide rail, a driving screw sleeve is provided in the middle of the lifting fire extinguishing frame, the lifting fire extinguishing frame is connected to the vertical screw rod through the driving screw sleeve, and the driving motor drives the lifting fire extinguishing frame to slide up and down along the vertical guide rail through the vertical screw rod and the driving screw sleeve to pass in front of multiple circuit breaker mounting frames in sequence; A fixed delivery pipe is provided at the center of the lifting fire extinguishing frame, and horizontal delivery pipes are symmetrically connected to the left and right ends of the fixed delivery pipe. A plurality of horizontal nozzles are evenly arranged in the middle of the horizontal delivery pipe. A temperature sensor is provided in the middle of the circuit breaker mounting frame; A delivery hose is connected and arranged above the fixed delivery pipe. The upper end of the delivery hose is connected to a normally closed solenoid valve, and the outer end of the normally closed solenoid valve is connected to a high-pressure gas storage cylinder.

[0006] Furthermore, rotary joints are symmetrically provided at the left and right ends of the fixed conveying pipe, and the horizontal conveying pipe is rotatably connected to the fixed conveying pipe through the rotary joint. A half-tooth gear is provided around the outer side of the rotary joint, and a vertical rack is provided in the middle of the inner side of the cabinet door. The vertical rack and the half-tooth gear are meshed with each other, and a reset coil spring is provided in the middle connection of the half-tooth gear.

[0007] Furthermore, the upper end of the delivery hose is wound around the outside of a recovery reel provided at the top of the main cabinet, the recovery reel is rotatably connected to the main cabinet, and a recovery coil spring is connected to the shaft end of the recovery reel.

[0008] Furthermore, a connecting sleeve is provided in the middle of the lifting fire extinguishing frame, and the driving screw sleeve is nested and slidably provided on the inner side of the connecting sleeve. The driving screw sleeve is connected to the lifting fire extinguishing frame through the connecting sleeve. An electric locking mechanism is correspondingly provided in the middle of the side wall of the connecting sleeve and the middle of the side wall of the driving screw sleeve. The driving screw sleeve and the connecting sleeve are connected to each other through the electric locking mechanism.

[0009] Furthermore, the power-on locking mechanism includes a horizontal locking sleeve arranged in the middle of the side wall of the connecting sleeve, and a magnetic locking pin is nested and slidably arranged on the inner side of the horizontal locking sleeve. The power-on locking mechanism also includes a connecting locking groove arranged in the middle of the side wall of the driving screw sleeve, and the connecting locking groove and the magnetic locking pin are cooperated with each other. A traction spring is provided on the rear side of the magnetic locking pin, and a locking electromagnet is provided at the rear end of the horizontal locking sleeve. When the locking electromagnet is energized, the magnetic locking pin is repelled by magnetic force to slide forward, stretching the traction spring and embedding it into the connecting locking groove to lock. When the locking electromagnet loses power, the traction spring pulls the magnetic locking pin to slide backward and disengage from the connecting locking groove to unlock.

[0010] Furthermore, a positioning and limiting mechanism is provided in parallel on the upper front side of the circuit breaker mounting frame, and the positioning and limiting mechanism includes a horizontal traction rope, which is provided in parallel on the upper front side of the circuit breaker mounting frame. The horizontal traction rope is made of fusible material, and horizontal limit pins are provided for sliding connection at the left and right ends of the circuit breaker mounting frame. The symmetrically provided horizontal limit pins are pulled together by the horizontal traction rope. When the horizontal traction rope is blown, the horizontal limit pins lose traction and pop out to prevent the lifting fire extinguishing frame from sliding.

[0011] Furthermore, the positioning and limiting mechanism also includes a limiting guide sleeve arranged in the middle of the vertical guide rail, a guide roller is provided at the outer end of the limiting guide sleeve, a horizontal limiting pin is nested and slidably provided on the inner side of the limiting guide sleeve, and a limiting spring is provided in the middle of the horizontal limiting pin. The left and right ends of the horizontal traction rope are guided by the guide rollers to extend to the limiting guide sleeve and are connected to the horizontal limiting pin. The horizontal limit pins symmetrically arranged on the left and right sides are connected to each other through the horizontal traction rope and are limited and retracted to the inner side of the limiting guide sleeve.

[0012] Furthermore, a unit circuit breaker is provided on the front side of the circuit breaker mounting frame, and the unit circuit breaker includes a horizontal bracket, which is connected to the cabinet door, and a sliding guide rail is vertically provided in the middle of the horizontal bracket, and a counterweight slider is provided in a sliding connection on the outer side of the sliding guide rail, and an arc-shaped locking groove is provided in the middle of the counterweight slider, and an arc-shaped spring piece is provided in the middle of the sliding guide rail, and the arc-shaped spring piece and the arc-shaped locking groove are cooperated with each other. A circuit breaker lever is provided on the side of the counterweight slider close to the circuit breaker mounting frame, and a touch lever is provided on the side of the lifting fire extinguishing frame close to the horizontal bracket, and the touch lever and the counterweight slider cooperate with each other. When the lifting fire extinguishing frame slides downward, the touch lever pushes the counterweight slider to slide downward along the sliding guide rail, thereby driving the circuit breaker lever to move downward synchronously.

[0013] Furthermore, the trigger lever is rotatably connected to the lifting fire extinguishing frame through a connecting shaft arranged at the rear end, a reset spring is arranged in the middle of the connecting shaft, a horizontal telescopic rod is arranged between the counterweight slider and the trip lever, the counterweight slider and the trip lever are connected to each other through the horizontal telescopic rod, and a buffer spring is arranged in the middle of the horizontal telescopic rod.

[0014] Furthermore, the unit circuit breaker also includes lateral guide rails, which are fixedly arranged on the left and right sides of the inner side of the cabinet door. Connecting slide grooves are provided at both ends of the left and right sides of the horizontal bracket. The horizontal bracket is slidingly connected to the lateral guide rails through the connecting slide grooves, and a locking bolt is provided in the middle of the connecting slide groove.

[0015] Beneficial effects of the present invention: As can be seen from the above description, the present invention provides an electric cabinet with an automatic fire extinguishing device, which is moved along the guide rail to the front of the fire mounting frame through a lifting fire extinguishing frame that can slide up and down, and then the normally closed solenoid valve is opened. The fire extinguishing agent in the high-pressure gas cylinder is injected into the fixed delivery pipe in the center of the lifting fire extinguishing frame through the delivery hose, and is diverted to the horizontal delivery pipes with horizontal nozzles on both sides, and is sprayed concentratedly at the core area of ​​the fire point. The horizontal nozzles are used for close-range directional spraying to the core area of ​​the fire point, which can quickly and accurately locate the fire point and extinguish the fire by precisely spraying the fire extinguishing agent, thereby improving the fire extinguishing efficiency, and can perform local treatment on the specific fire point, reducing unnecessary use of fire extinguishing agent, while maximizing the protection of equipment safety in the surrounding unaffected areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of a cabinet door in an open state according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the front structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the main cabinet according to an embodiment of the present invention; Figure 4 This is a structural diagram of a cabinet door according to an embodiment of the present invention; Figure 5 This is a schematic diagram of a partial structure of the top of a cabinet door according to an embodiment of the present invention; Figure 6 This is a structural diagram of a positioning and limiting mechanism according to an embodiment of the present invention; Figure 7 This is a front structural diagram of a lifting fire extinguishing rack according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the back structure of a lifting fire extinguishing rack according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the right side partial structure of the lifting fire extinguishing rack according to an embodiment of the present invention; Figure 10 This is a schematic structural diagram of a power-on locking mechanism according to an embodiment of the present invention; Figure 11 Schematic diagram of the structure of a unit circuit breaker according to an embodiment of the present invention; Figure 12 Schematic diagram of the structure of the counterweight slider according to an embodiment of the present invention.

[0018] The following are marked in the figure: 1. Main cabinet; 101. Circuit breaker mounting bracket; 102. Temperature sensor; 2. Positioning and limiting mechanism; 201. Horizontal traction rope; 202. Guide roller; 203. Limit guide sleeve; 204. Horizontal limit pin; 205. Limit spring; 3. Cabinet door; 301. Hinge; 302. Vertical guide rail; 303. Vertical screw; 304. Drive motor; 305. Vertical rack; 4. Lifting fire extinguisher frame; 401. Damping friction wheel; 402. Trigger lever; 403. Connecting shaft; 404. Reset spring; 405. Connecting sleeve; 406. Drive screw sleeve; 407. Connecting locking slot; 5. Power-on locking mechanism; 501. Horizontal locking sleeve; 502. Magnetic 503, traction spring; 504, locking electromagnet; 6, fixed delivery pipe; 601, rotary joint; 602, horizontal delivery pipe; 603, horizontal nozzle; 604, half-tooth gear; 605, reset coil spring; 7, delivery hose; 701, recovery reel; 702, recovery coil spring; 703, normally closed solenoid valve; 704, high-pressure gas cylinder; 8, unit circuit breaker; 801, lateral guide rail; 802, horizontal bracket; 803, connecting slide; 804, locking bolt; 805, sliding guide rail; 806, arc-shaped spring; 9, counterweight slider; 901, arc-shaped locking groove; 902, horizontal telescopic rod; 903, buffer spring; 904, circuit breaker lever. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown, a power cabinet with an automatic fire extinguishing device includes a main cabinet 1, a plurality of circuit breaker mounting frames 101 are arranged inside the main cabinet 1, and further includes: The cabinet door 3 is arranged outside the front opening of the main cabinet body 1. The cabinet door 3 is rotatably connected to the main cabinet body 1 through a hinge 301 arranged vertically on one side. Vertical guide rails 302 are symmetrically arranged on the left and right sides of the cabinet door 3. Vertical screws 303 are arranged parallel to the inner sides of the vertical guide rails 302. The shaft ends of the vertical screws 303 are connected to the drive motor 304. The lifting fire extinguishing frame 4 is arranged on the outside of the vertical guide rail 302, and the lifting fire extinguishing frame 4 is slidably connected to the vertical guide rail 302. A driving screw sleeve 406 is provided in the middle of the lifting fire extinguishing frame 4. The lifting fire extinguishing frame 4 is connected to the vertical screw 303 through the driving screw sleeve 406. The driving motor 304 drives the lifting fire extinguishing frame 4 to slide up and down along the vertical guide rail 302 through the vertical screw 303 and the driving screw sleeve 406 to pass in front of multiple circuit breaker mounting frames 101 in sequence; The fixed delivery pipe 6 is arranged at the center of the lifting fire extinguishing frame 4. The left and right ends of the fixed delivery pipe 6 are symmetrically connected to the horizontal delivery pipe 6. A plurality of horizontal nozzles 603 are evenly arranged in the middle of the horizontal delivery pipe 602. A temperature sensor 102 is arranged in the middle of the circuit breaker mounting frame 101. The delivery hose 7 is connected and arranged above the fixed delivery pipe 6. The upper end of the delivery hose 7 is connected to a normally closed electromagnetic valve 703, and the outer end of the normally closed electromagnetic valve 703 is connected to a high-pressure gas storage bottle 704.

[0022] In this embodiment, the power cabinet includes a main cabinet body 1 and a circuit breaker mounting frame 101 arranged in multiple layers therein. The cabinet door 3 is mounted on the front opening of the main cabinet body 1 via a hinge 301. A vertical guide rail 302 and a parallel vertical screw 303 are provided on the inner side of the cabinet door 3. The top of the screw is connected to a drive motor 304. The lifting fire extinguishing frame 4 is linked to the screw transmission system through a guide rail sliding mechanism. When the drive motor 304 drives the vertical screw 303 to rotate, the drive screw sleeve 406 embedded in the lifting fire extinguishing frame 4 converts the rotational motion into linear motion, so that the lifting fire extinguishing frame 4 can be accurately lifted and lowered along the guide rail to the position directly in front of any circuit breaker mounting frame 101. On the other hand, a longitudinal fixed delivery pipe 6 is fixed in the center of the lifting fire extinguishing frame 4, and horizontal delivery pipes 602 with evenly distributed horizontal nozzles 603 extend symmetrically on both sides. A temperature sensor 102 is embedded in the middle of each circuit breaker mounting frame 101 to monitor the equipment temperature in real time. The fire extinguishing agent is stored in a high-pressure gas cylinder 704, such as heptafluoropropane or aerosol, and is connected to the fixed delivery pipe 6 through a normally closed solenoid valve 703 and a delivery hose 7. When a circuit breaker mounting frame 101 ignites due to a fault, the temperature sensor 102 detects an abnormally high temperature signal. The core control center of the device is a central controller, which integrates a microprocessor and a communication module. The block receives the monitoring data of the temperature sensor 102 embedded in the middle of each circuit breaker mounting frame 101 in real time. The fire point temperature sensor 102 detects an abnormally high temperature signal and transmits it to the central controller in real time. The controller calculates the coordinates of the target mounting frame according to the sensor number and outputs a pulse signal to the servo driver. The drive motor 304 drives the vertical screw 303 to rotate accurately, so that the lifting fire extinguishing frame 4 moves along the guide rail to the front of the fire mounting frame. After the lifting frame is in place, the controller synchronously opens the normally closed solenoid valve 703, and the fire extinguishing agent in the high-pressure gas storage cylinder 704 is injected into the fixed delivery pipe 6 in the center of the lifting fire extinguishing frame 4 through the delivery hose 7. , diverted to the horizontal delivery pipe 602 with horizontal nozzles 603 on both sides, and concentratedly sprayed at the core area of ​​the fire point. The horizontal nozzles 603 spray directly to the core area of ​​the fire point at a close distance. After the fire is extinguished, the system automatically closes the solenoid valve and resets the lifting fire extinguishing frame 4. Therefore, the power cabinet adopts the lifting fire extinguishing frame 4 that can slide and adjust the position, which can quickly and accurately locate the fire point and extinguish the fire by accurately spraying the fire extinguishing agent, thereby improving the fire extinguishing efficiency, and can perform local treatment on the specific fire point, reducing unnecessary use of fire extinguishing agent, while maximizing the protection of equipment safety in the surrounding unaffected areas.

[0023] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12As shown, preferably, a rotary joint 601 is added to the left and right ends of the fixed conveying pipe 6 of the lifting fire extinguishing frame 4 of the power cabinet, so that the horizontal conveying pipe 602 can rotate freely around the vertical axis, and a half-tooth gear 604 is coaxially fixed on the outside of the rotary joint 601, and its tooth area covers a certain angle range. A vertical rack 305 is provided in the middle of the inner side of the cabinet door 3. When the lifting fire extinguishing frame 4 moves along the guide rail, the half-tooth gear 604 forms an intermittent meshing with the vertical rack 305, so that when the lifting fire extinguishing frame slides along the guide rail, the toothless area of ​​the half-tooth gear 604 slides over the rack, and the horizontal sprinkler 603 keeps tilting downward, while the toothed area of ​​the half-tooth gear 604 meshes with the rack, and the gear rotation drives the horizontal conveying pipe 602 to rotate and expand upward, thereby causing the horizontal sprinkler 603 to follow the upward tilt, and the half-tooth gear 604 is meshed with the rack. A reset coil spring 605 is set on the axis of the toothed gear 604, and the coil spring stores energy when the horizontal sprinkler 603 follows the upward tilt. When the toothless area is separated from the rack, the coil spring releases the torque to automatically reset the horizontal sprinkler 603 to the downward tilt position, so that the horizontal sprinkler 603 can swing up and down periodically to cover the fire point and improve the fire extinguishing efficiency. The upper end of the conveying hose 7 is wound around the outside of the recovery reel 701 set at the top of the main cabinet 1. The recovery reel 701 is rotatably connected to the main cabinet 1, and the shaft end of the recovery reel 701 is connected to a recovery coil spring 702. When the lifting fire extinguishing frame 4 slides up and down, the conveying hose 7 can be synchronously released or recovered through the recovery reel 701, which is convenient for the conveying hose 7 to be stored and the cabinet door 3 of the power cabinet can be opened normally.

[0024] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12As shown, preferably, the driving screw sleeve 406 of the power cabinet is nested in the connecting sleeve 405 of the lifting fire extinguishing frame 4, and the side walls of the two are correspondingly provided with an energized locking mechanism 5, which includes a horizontal locking sleeve 501 on the side wall of the connecting sleeve 405, a built-in slidable magnetic locking pin 502, a rear traction spring 503, a connecting locking groove 407 on the side wall of the driving screw sleeve 406, a locking electromagnet 504 at the rear end of the locking sleeve, a connecting sleeve 405 is provided in the middle of the lifting fire extinguishing frame 4, and a driving screw sleeve 406 is provided. 06 nested sliding arrangement is set on the inner side of the connecting sleeve 405. When the power is on, the locking electromagnet 504 generates a magnetic repulsion force, pushing the magnetic locking pin 502 to overcome the spring resistance and embed into the locking groove of the driving screw sleeve 406 to achieve a rigid connection. When the power is off, the electromagnet loses power, the traction spring 503 pulls the magnetic locking pin 502 back, and the driving screw sleeve 406 is automatically separated from the connecting sleeve 405. A damping friction wheel 401 is set at the sliding contact between the lifting fire extinguishing frame 4 and the vertical guide rail 302, and its wheel surface is in contact with the guide rail. The rail side is in constant pressure contact, generating controllable friction resistance. When the main circuit is powered off due to fire, the power-on locking mechanism 5 is automatically released, driving the screw sleeve 406 to disengage from the lifting fire extinguishing frame 4. The lifting fire extinguishing frame 4 slides down along the vertical guide rail 302 under the action of gravity. The damping friction wheel 401 limits the sliding speed. At the same time, the normally closed solenoid valve 703 remains normally closed when energized and opens when the power is off, thereby opening the normally closed solenoid valve 703 synchronously. The fire extinguishing agent is delivered to the horizontal sprinkler 603 through the delivery hose 7, and the lifting frame is evenly distributed. It quickly slides through all circuit breaker mounting racks 101, and the nozzle continuously sprays fire extinguishing agent downwards to achieve full coverage of fire extinguishing in the cabinet, thereby achieving no crash when the power is off, solving the fatal defect of traditional electric fire extinguishing devices that they become paralyzed when the power is off. Gravity descent and damping speed control ensure that full-area fire extinguishing can still be performed in the absence of power. The descent process passes through each layer of mounting racks in turn, and continuous spraying is used to achieve uniform distribution of fire extinguishing agent to avoid missing hidden fire sources. The fire extinguishing system circuit is physically isolated from the main circuit of the cabinet and is equipped with a dedicated battery pack.

[0025] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12As shown, preferably, the power cabinet is provided with a positioning and limiting mechanism 2 in parallel on the upper side in front of the circuit breaker mounting frame 101 on each layer. The core component includes a horizontal traction rope 201. The horizontal traction rope 201 is made of a fusible material, such as a modified nylon + graphene composite core material with a melting point of about 150 degrees Celsius. It runs across the front of the mounting frame and also includes a two-way limiting system. After the two ends of the traction rope are turned by the guide roller 202, they are connected to the horizontal limiting pins 204 on both sides of the mounting frame. The positioning and limiting mechanism 2 also includes a limiting guide sleeve 203 arranged in the middle of the vertical guide rail 302. The limiting pin It is nested in the limit guide sleeve 203, and a limit spring 205 is set in the middle. When the traction rope is tensioned, the spring resistance is overcome to pull the limit pin back into the guide sleeve. When the fire causes the traction rope to melt, the spring instantly releases the thrust, driving the limit pin to pop out. When there is no fire, the traction rope constrains the limit pin to retract, and the lifting fire extinguishing frame 4 can pass freely. When a fire occurs, the high temperature of the flame melts the traction rope and the limit pins on both sides pop out, thereby forming a physical blocking wall, and the lifting frame moves downward to position. When the lifting fire extinguishing frame 4 touches the limit pin, the mechanical stop is triggered to achieve mechanical and electronic dual redundant positioning, and the overall reliability and safety are higher.

[0026] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown, preferably, the power cabinet is provided with a unit breaker 8 on the front side of each layer of the circuit breaker mounting frame 101, and the unit breaker 8 includes a horizontal bracket 802, which is interconnected with the cabinet door 3, and a sliding guide rail 805 is vertically provided in the middle of the horizontal bracket 802. The outer sliding connection of the sliding guide rail 805 is provided with a counterweight slider 9, and an arc-shaped locking groove 901 is provided in the middle of the counterweight slider 9. An arc-shaped spring piece 806 is provided in the middle of the sliding guide rail 805. The arc-shaped spring piece 806 and the arc-shaped locking groove 901 are mutually coordinated. Under normal circumstances, the spring piece is stuck in the arc-shaped locking groove 901 to form a mechanical self-locking, and the counterweight slider 9 is close to A trip lever 904 is provided on one side of the circuit breaker mounting frame 101, and a trigger lever 402 is provided on the side of the lifting fire extinguishing frame 4 close to the horizontal bracket 802. The trigger lever 402 cooperates with the counterweight slider 9. When the lifting fire extinguishing frame 4 slides downward, the trigger lever 402 pushes the counterweight slider 9. At this time, the arc-shaped spring piece 806 elastically deforms and disengages from the locking groove to unlock. The counterweight slider 9 slides downward along the sliding guide rail 805, thereby driving the trip lever 904 to move downward synchronously, so that the trip lever 904 accurately hits the circuit breaker operating handle, forcing the circuit breaker to open, thereby realizing automatic tripping and power-off of the circuit breaker, and the overall reliability and safety are higher.

[0027] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown, preferably, the trigger lever 402 of the power cabinet is rotatably connected to the lifting fire extinguishing frame 4 through the connecting shaft 403 provided at the rear end, and a reset folding spring 404 is provided in the middle of the connecting shaft 403, so that when the lifting fire extinguishing frame 4 pushes the counterweight slider 9 to continue to slide downward, the reset folding spring 404 flips upward at a certain angle to make way, so that the lifting fire extinguishing frame 4 continues to slide downward through the counterweight slider 9 driven by the toggle. After the lifting frame passes, the folding spring releases energy to automatically reset the lever to the horizontal standby position, and the flipping and making way mechanism of the reset folding spring 404 ensures that the lifting fire extinguishing frame 4 completes the circuit breaker after pushing the counterweight slider 9. After that, it can continue to descend to the fire floor without hindrance, solving the problem of rigid structure jamming. A horizontal telescopic rod 902 is provided between the counterweight slider 9 and the tripping lever 904. The counterweight slider 9 and the tripping lever 904 are connected to each other through the horizontal telescopic rod 902. A buffer spring 903 is provided in the middle of the horizontal telescopic rod 902. When the lever hits the circuit breaker handle, the impact force compresses the buffer spring 903. The spring absorbs kinetic energy and converts it into elastic potential energy for slow release. Therefore, the buffer spring 903 converts the tripping impact force into continuous and smooth thrust, avoiding deformation or breakage of the circuit breaker handle due to instantaneous impact, thereby extending the life of the equipment.

[0028] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12As shown, preferably, the unit circuit breaker 8 of the power cabinet also includes a lateral guide rail 801, which is fixedly arranged on the left and right sides of the inner side of the cabinet door 3, and the left and right ends of the horizontal bracket 802 are provided with a connecting slide 803. The horizontal bracket 802 is slidably connected to the lateral guide rail 801 through the connecting slide 803, and the middle rotation of the connecting slide 803 is provided with a locking bolt 804, so that the horizontal bracket 802 can be slid up and down to adjust the position according to needs, so that the circuit breaker lever 904 is located in a suitable position, so that the circuit breaker lever 904 can be accurately matched with circuit breaker operating handles of different heights and models, and is fixed after adjustment by the locking bolt 804, which is more flexible and convenient to use.

[0029] The power cabinet with automatic fire extinguishing device provided by the present invention is moved along the guide rail to the front of the fire mounting frame by the lifting fire extinguishing frame 4 that can slide up and down, and then the normally closed solenoid valve 703 is opened. The fire extinguishing agent in the high-pressure gas cylinder 704 is injected into the fixed delivery pipe 6 in the center of the lifting fire extinguishing frame 4 through the delivery hose 7, and is divided into the horizontal delivery pipe 602 with horizontal nozzles 603 on both sides, and is sprayed concentratedly at the core area of ​​the fire point. The horizontal nozzle 603 sprays the fire point at a close distance in a targeted manner, which can quickly and accurately locate the fire point and extinguish the fire by precisely spraying the fire extinguishing agent, thereby improving the fire extinguishing efficiency, and can perform local treatment on the specific fire point, reducing unnecessary use of fire extinguishing agent, while maximizing the protection of equipment safety in the surrounding unaffected areas.

[0030] Those skilled in the art will understand that the discussion of any of the above embodiments is merely illustrative and is not intended to limit the scope of the present invention to these examples. Within the spirit and principles of the present invention, the technical features of the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and many other variations exist for the various aspects of the present invention described above, which are not provided in detail for the sake of clarity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electric power cabinet with an automatic fire extinguishing device, comprising a main cabinet (1), wherein a plurality of circuit breaker mounting frames (101) are arranged inside the main cabinet (1), characterized in that: Also includes: A cabinet door (3) is arranged outside the front opening of the main cabinet body (1), and the cabinet door (3) is rotatably connected to the main cabinet body (1) via a hinge (301) arranged vertically on one side. Vertical guide rails (302) are symmetrically arranged on the left and right sides of the cabinet door (3), and vertical screw rods (303) are arranged parallel to the inner sides of the vertical guide rails (302). The shaft end of the vertical screw rod (303) is connected to a drive motor (304); A lifting fire extinguishing frame (4) is arranged on the outside of the vertical guide rail (302), the lifting fire extinguishing frame (4) is slidably connected to the vertical guide rail (302), a driving screw sleeve (406) is provided in the middle of the lifting fire extinguishing frame (4), the lifting fire extinguishing frame (4) is connected to the vertical screw rod (303) through the driving screw sleeve (406), and the driving motor (304) drives the lifting fire extinguishing frame (4) to slide up and down along the vertical guide rail (302) through the vertical screw rod (303) and the driving screw sleeve (406) to sequentially pass in front of a plurality of circuit breaker mounting frames (101); A fixed delivery pipe (6) is arranged at the center of the lifting fire extinguishing frame (4); horizontal delivery pipes (602) are symmetrically connected to the left and right ends of the fixed delivery pipe (6); a plurality of horizontal nozzles (603) are evenly arranged in the middle of the horizontal delivery pipe (602); and a temperature sensor (102) is arranged in the middle of the circuit breaker mounting frame (101); A delivery hose (7) is connected and arranged above the fixed delivery pipe (6); the upper end of the delivery hose (7) is connected and arranged with a normally closed electromagnetic valve (703); the outer end of the normally closed electromagnetic valve (703) is connected and arranged with a high-pressure gas storage bottle (704).

2. The power cabinet with automatic fire extinguishing device according to claim 1, characterized in that: Rotary joints (601) are symmetrically provided at the left and right ends of the fixed delivery pipe (6), and the horizontal delivery pipe (602) is rotatably connected to the fixed delivery pipe (6) via the rotary joint (601). A half-tooth gear (604) is provided around the outer side of the rotary joint (601), and a vertical rack (305) is provided in the middle of the inner side of the cabinet door (3). The vertical rack (305) and the half-tooth gear (604) are meshed and connected with each other, and a return coil spring (605) is provided in the middle of the half-tooth gear (604).

3. The power cabinet with automatic fire extinguishing device according to claim 1, characterized in that: The upper end of the delivery hose (7) is wound around the outside of a recovery reel (701) provided at the top of the main cabinet (1); the recovery reel (701) is rotationally connected to the main cabinet (1); and a recovery coil spring (702) is connected to the shaft end of the recovery reel (701).

4. The power cabinet with automatic fire extinguishing device according to claim 1, characterized in that: A connecting sleeve (405) is provided in the middle of the lifting fire extinguishing frame (4), the driving screw sleeve (406) is nested and slidably provided on the inner side of the connecting sleeve (405), the driving screw sleeve (406) is connected to the lifting fire extinguishing frame (4) through the connecting sleeve (405), and an electrified locking mechanism (5) is correspondingly provided in the middle of the side wall of the connecting sleeve (405) and the middle of the side wall of the driving screw sleeve (406), and the driving screw sleeve (406) and the connecting sleeve (405) are connected to each other through the electrified locking mechanism (5).

5. The power cabinet with automatic fire extinguishing device according to claim 4, characterized in that: The power-on locking mechanism (5) comprises a horizontal locking sleeve (501) arranged in the middle of the side wall of the connecting sleeve (405), a magnetic locking pin (502) is nested and slidably arranged on the inner side of the horizontal locking sleeve (501), and the power-on locking mechanism (5) further comprises a connecting locking groove (407) arranged in the middle of the side wall of the driving screw sleeve (406), the connecting locking groove (407) and the magnetic locking pin (502) are arranged to cooperate with each other, a traction spring (503) is arranged on the rear side of the magnetic locking pin (502), and a locking electromagnet (504) is arranged at the rear end of the horizontal locking sleeve (501). When the locking electromagnet (504) is energized, the magnetic locking pin (502) is repelled by magnetic force to slide forward, stretch the traction spring (503) and embed into the connecting locking groove (407) to lock. When the locking electromagnet (504) loses power, the traction spring (503) pulls the magnetic locking pin (502) to slide backward and disengage from the connecting locking groove (407) to unlock.

6. The power cabinet with automatic fire extinguishing device according to claim 1, characterized in that: A positioning and limiting mechanism (2) is provided in parallel on the upper front side of the circuit breaker mounting frame (101), and the positioning and limiting mechanism (2) includes a horizontal traction rope (201). The horizontal traction rope (201) is provided in parallel on the upper front side of the circuit breaker mounting frame (101), and the horizontal traction rope (201) is made of a fusible material. Horizontal limiting pins (204) are provided at the left and right ends of the circuit breaker mounting frame (101) in a sliding connection, and the symmetrically provided horizontal limiting pins (204) are mutually pulled by the horizontal traction rope (201). When the horizontal traction rope (201) is fused, the horizontal limiting pins (204) lose traction and pop out to prevent the lifting fire extinguishing frame (4) from sliding.

7. The power cabinet with automatic fire extinguishing device according to claim 6, characterized in that: The positioning and limiting mechanism (2) further comprises a limiting guide sleeve (203) arranged in the middle of the vertical guide rail (302), a guide roller (202) is arranged at the outer end of the limiting guide sleeve (203), a horizontal limiting pin (204) is nested and slidably arranged inside the limiting guide sleeve (203), a limiting spring (205) is arranged in the middle of the horizontal limiting pin (204), the left and right ends of the horizontal traction rope (201) are guided by the guide roller (202) to extend to the limiting guide sleeve (203) and are connected to the horizontal limiting pin (204), and the horizontal limiting pins (204) symmetrically arranged on the left and right sides are connected to each other by the horizontal traction rope (201) and are limited and retracted to the inner side of the limiting guide sleeve (203).

8. The power cabinet with automatic fire extinguishing device according to claim 1, characterized in that: A unit switch (8) is provided on the front side of the circuit breaker mounting frame (101), and the unit switch (8) includes a horizontal bracket (802), the horizontal bracket (802) and the cabinet door (3) are connected to each other, a sliding guide rail (805) is vertically provided in the middle of the horizontal bracket (802), a counterweight slider (9) is provided on the outer side of the sliding guide rail (805) in sliding connection, an arc-shaped locking groove (901) is provided in the middle of the counterweight slider (9), an arc-shaped spring piece (806) is provided in the middle of the sliding guide rail (805), and the arc-shaped spring piece (806) is provided in the middle of the sliding guide rail (805). ) and the arc-shaped locking groove (901) are mutually arranged, a circuit breaker lever (904) is provided on the side of the counterweight slider (9) close to the circuit breaker mounting frame (101), and a trigger lever (402) is provided on the side of the lifting fire extinguishing frame (4) close to the horizontal bracket (802). The trigger lever (402) and the counterweight slider (9) cooperate with each other. When the lifting fire extinguishing frame (4) slides downward, the trigger lever (402) pushes the counterweight slider (9) to slide downward along the sliding guide rail (805), thereby driving the circuit breaker lever (904) to move downward synchronously.

9. The power cabinet with automatic fire extinguishing device according to claim 8, characterized in that: The trigger lever (402) is rotatably connected to the lifting fire extinguishing frame (4) via a connecting shaft (403) provided at the rear end; a reset folding spring (404) is provided in the middle of the connecting shaft (403); a horizontal telescopic rod (902) is provided between the counterweight slider (9) and the tripping lever (904); the counterweight slider (9) and the tripping lever (904) are connected to each other via the horizontal telescopic rod (902); and a buffer spring (903) is provided in the middle of the horizontal telescopic rod (902).

10. The power cabinet with automatic fire extinguishing device according to claim 9, characterized in that: The unit switch (8) further comprises a lateral guide rail (801), the lateral guide rail (801) being fixedly arranged on the left and right sides of the inner side of the cabinet door (3), the left and right ends of the horizontal bracket (802) being provided with a connecting slide groove (803), the horizontal bracket (802) being slidably connected to the lateral guide rail (801) via the connecting slide groove (803), and a locking bolt (804) being rotatably arranged in the middle of the connecting slide groove (803).

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