An electric power cabinet with automatic fire extinguishing device

Abstract

The application relates to the technical field of electrical equipment, in particular to a power cabinet with an automatic fire extinguishing device, which comprises a main cabinet body, a plurality of circuit breaker mounting racks arranged in the main cabinet body, a cabinet door arranged outside the front opening of the main cabinet body, the cabinet door being rotationally connected with the main cabinet body through a hinge arranged on the vertical side, vertical guide rails being symmetrically arranged on the left and right sides of the cabinet door, and vertical screws being parallelly arranged on the inner sides of the vertical guide rails. The lifting fire extinguishing frame can move along the guide rails to the front of the fire mounting rack, the horizontal spray head can be used to carry out close directional spraying to the core area of the fire starting point, the fire starting point can be quickly and accurately positioned, the fire extinguishing agent can be accurately sprayed to extinguish the fire, the fire extinguishing efficiency is improved, the specific fire starting point can be locally treated, the use amount of the fire extinguishing agent is reduced, and the safety of the equipment in the surrounding unaffected area is maximally protected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to a power cabinet with an automatic fire extinguishing device. BACKGROUND

[0002] As the core infrastructure in the fields of modern power transmission and distribution, automatic control and data center, the power cabinet usually has circuit breakers, contactors and a large number of cables and other electrical equipment installed inside. Under the influence of long-term high-load operation, short circuit or external environmental factors, local overheating, electric arc or even open fire may occur inside the cabinet, which may cause fire risk. Since the space inside the cabinet is relatively closed, the equipment is highly dense and usually unattended, once a fire breaks out, the fire spreads very quickly. Therefore, it is a key protection measure to equip the power cabinet with an efficient and reliable automatic fire extinguishing device to achieve early detection and rapid suppression of fire, which ensures the safe operation of the equipment and reduces fire loss.

[0003] At present, the automatic fire extinguishing device applied inside the power cabinet is generally a gas fire extinguishing system or an aerosol fire extinguishing device based on the principle of full flooding. After triggering, the gas or aerosol full flooding system needs to release sufficient fire extinguishing agent into the entire cabinet closed space to achieve the design concentration. Its fire extinguishing effect depends on the sealing of the cabinet. In actual application, the cable inlet and outlet cannot be completely sealed, and the location of the fire source cannot be distinguished, resulting in large consumption of agent, high cost, and the possibility of unnecessary pollution or corrosion risk to sensitive electronic devices in non-fire areas. The fire extinguishing agent cannot be accurately delivered to the actual fire point, causing delay and low efficiency in fire extinguishing. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a power cabinet with an automatic fire extinguishing device to solve the problem of the current fire extinguishing structure of the power cabinet, which needs to release sufficient fire extinguishing agent into the entire cabinet closed space to achieve the design concentration. The fire extinguishing agent cannot be accurately delivered to the actual fire point, causing delay and low efficiency in fire extinguishing, and large consumption of agent.

[0005] In order to achieve the above purpose, the present application provides a power cabinet with an automatic fire extinguishing device, which comprises a main cabinet body, a plurality of circuit breaker mounting racks arranged inside the main cabinet body, and the following components:

[0006] A cabinet door is arranged outside the front opening of the main cabinet body. The cabinet door is rotationally connected to the main cabinet body through a hinge arranged on the vertical side. Vertical guide rails are symmetrically arranged on the left and right sides of the cabinet door. Vertical screws are arranged in parallel on the inner side of the vertical guide rails. Drive motors are connected to the shaft ends of the vertical screws.

[0007] Lifting fire extinguishing frame, set up in the outer side of the vertical guide rail, the lifting fire extinguishing frame and the vertical guide rail between sliding connection, the middle of the lifting fire extinguishing frame is provided with drive screw sleeve, the lifting fire extinguishing frame is connected with the vertical screw through drive screw sleeve, the drive motor drives the lifting fire extinguishing frame to slide along the vertical guide rail up and down through vertical screw and drive screw sleeve to pass through the front of the multiple circuit breaker mounting frame in turn;

[0008] Fixed conveying pipe, set up in the center of the lifting fire extinguishing frame, the left and right ends of the fixed conveying pipe are symmetrically connected with horizontal conveying pipes, a plurality of horizontal nozzles are uniformly arranged in the middle of the horizontal conveying pipe, and a temperature sensor is arranged in the middle of the circuit breaker mounting frame.

[0009] Conveying hose, connected to the upper side of the fixed conveying pipe, the upper end of the conveying hose is connected with a normally closed electromagnetic valve, and the outer end of the normally closed electromagnetic valve is connected with a high-pressure gas cylinder.

[0010] Further, the left and right ends of the fixed conveying pipe are also symmetrically provided with rotary joints, the horizontal conveying pipe is rotatably connected with the fixed conveying pipe through the rotary joints, a half-tooth gear is arranged on the outer side of the rotary joint, a vertical rack is arranged in the middle of the inner side of the cabinet door, the vertical rack and the half-tooth gear are rotatably connected, and a return coil spring is arranged in the middle of the half-tooth gear.

[0011] Further, the upper end of the conveying hose is wound on the outer side of the recovery winding wheel arranged at the top end of the main cabinet body, the recovery winding wheel is rotatably connected with the main cabinet body, and a recovery coil spring is arranged at the shaft end of the recovery winding wheel.

[0012] Further, a connecting sleeve is arranged in the middle of the lifting fire extinguishing frame, the drive screw sleeve is slidably arranged in the inner side of the connecting sleeve, the drive screw sleeve is rotatably connected with the lifting fire extinguishing frame through the connecting sleeve, and a power-on locking mechanism is arranged in the middle of the side wall of the connecting sleeve and the middle of the side wall of the drive screw sleeve, and the drive screw sleeve and the connecting sleeve are rotatably connected through the power-on locking mechanism.

[0013] Further, the power-on locking mechanism comprises a horizontal locking sleeve arranged in the middle of the side wall of the connecting sleeve, and a magnetic locking pin is slidably arranged in the inner side of the horizontal locking sleeve, the power-on locking mechanism further comprises a connecting locking groove arranged in the middle of the side wall of the drive screw sleeve, the connecting locking groove and the magnetic locking pin are rotatably arranged, a traction spring is arranged at the back side of the magnetic locking pin, and a locking electromagnet is arranged at the back end of the horizontal locking sleeve, when the locking electromagnet is electrified, the magnetic locking pin is repelled by magnetic force and slides forward to stretch the traction spring and is embedded in the connecting locking groove to be locked, and when the locking electromagnet is de-energized, the traction spring pulls the magnetic locking pin to slide backward to be separated from the connecting locking groove to be unlocked.

[0014] Further, the front upper side of the circuit breaker mounting frame is provided with a positioning limiting mechanism in parallel, the positioning limiting mechanism comprises a horizontal traction rope, the horizontal traction rope is provided on the front upper side of the circuit breaker mounting frame in parallel, the horizontal traction rope is made of a material that is easy to break, and horizontal limiting pins are slidingly connected to the left and right ends of the circuit breaker mounting frame, the horizontally symmetric limiting pins are pulled by the horizontal traction rope, and the horizontal limiting pins pop out to hinder the sliding of the lifting fire extinguishing frame when the horizontal traction rope breaks.

[0015] Further, the positioning limiting mechanism further comprises a limiting guide sleeve arranged in the vertical guide rail, the outer end of the limiting guide sleeve is provided with a guide roller, the inner side of the limiting guide sleeve is slidably nested with a horizontal limiting pin, the middle of the horizontal limiting pin is provided with a limiting spring, and the left and right ends of the horizontal traction rope are guided to extend to the limiting guide sleeve through the guide roller and are connected with the horizontal limiting pin.

[0016] Further, the front side of the circuit breaker mounting frame is provided with a unit breaker, the unit breaker comprises a horizontal support, the horizontal support is connected with the cabinet door, a sliding guide rail is vertically arranged in the middle of the horizontal support, a counterweight sliding block is slidably connected to the outer side of the sliding guide rail, an arc-shaped locking groove is arranged in the middle of the counterweight sliding block, an arc-shaped elastic sheet is arranged in the middle of the sliding guide rail, the arc-shaped elastic sheet and the arc-shaped locking groove are arranged in mutual cooperation, a tripping lever is arranged on the side of the counterweight sliding block close to the circuit breaker mounting frame, a triggering lever is arranged on the side of the lifting fire extinguishing frame close to the horizontal support, the triggering lever and the counterweight sliding block are arranged in mutual cooperation, when the lifting fire extinguishing frame slides downward, the triggering lever pushes the counterweight sliding block to slide downward along the sliding guide rail, and then drives the tripping lever to move downward synchronously.

[0017] Further, the triggering lever is rotationally connected with the lifting fire extinguishing frame through a connecting shaft arranged at the rear end, a reset coil spring is arranged in the middle of the connecting shaft, a horizontal telescopic rod is arranged between the counterweight sliding block and the tripping lever, the counterweight sliding block and the tripping lever are connected with each other through the horizontal telescopic rod, and a buffer spring is arranged in the middle of the horizontal telescopic rod.

[0018] Further, the unit breaker further comprises a lateral guide rail, the lateral guide rail is fixedly arranged on the left and right sides of the inner side of the cabinet door, a connecting sliding groove is arranged at the left and right ends of the horizontal support, the horizontal support is slidably connected with the lateral guide rail through the connecting sliding groove, and a locking bolt is rotationally arranged in the middle of the connecting sliding groove.

[0019] The beneficial effects of the present application: from the above, it can be seen that the power cabinet with automatic fire extinguishing device provided by the present application can move to the front of the fire installation frame along the guide rail through the up-down sliding lifting fire extinguishing frame, then open the normally closed electromagnetic valve, 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, is branched to the horizontal delivery pipe with horizontal nozzles on both sides, is concentratedly sprayed to the core area of the fire point, is closely and directionally sprayed to the core area of the fire point by the horizontal nozzles, can quickly and accurately position the fire point, and extinguishes the fire through accurate spraying of the fire extinguishing agent, improves the fire extinguishing efficiency, and can perform local treatment according to the specific fire point, reduces unnecessary use amount of the fire extinguishing agent, and maximally protects the safety of the equipment in the surrounding unaffected area. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only illustrate the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0021] Figure 1 It is a structure schematic diagram of the cabinet door opening state of the embodiment of the present application.

[0022] Figure 2 It is a front structure schematic diagram of the embodiment of the present application.

[0023] Figure 3 It is an internal structure schematic diagram of the main cabinet body of the embodiment of the present application.

[0024] Figure 4 It is a structure schematic diagram of the cabinet door of the embodiment of the present application.

[0025] Figure 5 It is a top partial structure schematic diagram of the cabinet door of the embodiment of the present application.

[0026] Figure 6 It is a structure schematic diagram of the positioning limiting mechanism of the embodiment of the present application.

[0027] Figure 7 It is a front structure schematic diagram of the lifting fire extinguishing frame of the embodiment of the present application.

[0028] Figure 8 It is a back structure schematic diagram of the lifting fire extinguishing frame of the embodiment of the present application.

[0029] Figure 9 It is a right side partial structure schematic diagram of the lifting fire extinguishing frame of the embodiment of the present application.

[0030] Figure 10Structure diagram of the power-on locking mechanism of the embodiment of the present application;

[0031] Figure 11 Structure diagram of the unit breaker of the embodiment of the present application;

[0032] Figure 12 Structure diagram of the counterweight slider of the embodiment of the present application.

[0033] Marked as:

[0034] 1, main cabinet; 101, circuit breaker mounting rack; 102, temperature sensor; 2, positioning limiting mechanism; 201, horizontal traction rope; 202, guide roller; 203, limiting guide sleeve; 204, horizontal limiting pin; 205, limiting spring; 3, cabinet door; 301, hinge; 302, vertical guide rail; 303, vertical screw; 304, drive motor; 305, vertical rack; 4, lifting fire extinguishing frame; 401, damping friction wheel; 402, touch lever; 403, connecting shaft; 404, reset coil spring; 405, connecting sleeve; 406, drive screw sleeve; 407, connecting locking groove; 5, power-on locking mechanism; 501, horizontal locking sleeve; 502, magnetic locking pin; 503, traction spring; 504, locking electromagnet; 6, fixed conveying pipe; 601, rotary joint; 602, horizontal conveying pipe; 603, horizontal spray head; 604, half-tooth gear; 605, reset coil spring; 7, conveying hose; 701, recovery winding wheel; 702, recovery coil spring; 703, normally closed electromagnetic valve; 704, high-pressure gas cylinder; 8, unit breaker; 801, lateral guide rail; 802, horizontal support; 803, connecting sliding groove; 804, locking bolt; 805, sliding guide rail; 806, arc-shaped elastic sheet; 9, counterweight slider; 901, arc-shaped locking groove; 902, horizontal telescopic rod; 903, buffer spring; 904, tripping lever. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with specific embodiments.

[0036] It should be noted that the technical terms or scientific terms used in the present application should be understood as the general meaning understood by those skilled in the art to which the present application belongs, unless otherwise defined. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] As 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 A power cabinet with automatic fire extinguishing device, comprising a main cabinet body 1, a plurality of circuit breaker mounting racks 101 are arranged inside the main cabinet body 1, further comprising:

[0038] The cabinet door 3 is arranged outside the front opening of the main cabinet body 1, and the cabinet door 3 is rotatably connected with the main cabinet body 1 through the hinge 301 arranged on one side vertically. The vertical guide rail 302 is symmetrically arranged on the left and right sides of the cabinet door 3, and the vertical screw rod 303 is arranged in parallel on the inner side of the vertical guide rail 302. The shaft end of the vertical screw rod 303 is connected with the driving motor 304.

[0039] The lifting fire extinguishing frame 4 is arranged outside the vertical guide rail 302, and the lifting fire extinguishing frame 4 is slidably connected with the vertical guide rail 302. The driving screw sleeve 406 is arranged in the middle of the lifting fire extinguishing frame 4, and the lifting fire extinguishing frame 4 is connected with the vertical screw rod 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 rod 303 and the driving screw sleeve 406, so as to pass in front of the plurality of circuit breaker mounting racks 101 in turn.

[0040] The fixed conveying pipe 6 is arranged at the center of the lifting fire extinguishing frame 4, and the horizontal conveying pipe 602 is symmetrically connected at the left and right ends of the fixed conveying pipe 6. A plurality of horizontal nozzles 603 are uniformly arranged in the middle of the horizontal conveying pipe 602. The temperature sensor 102 is arranged in the middle of the circuit breaker mounting rack 101.

[0041] The conveying hose 7 is connected to the fixed conveying pipe 6 arranged above, the upper end of the conveying hose 7 is connected to the normally closed electromagnetic valve 703, and the outer end of the normally closed electromagnetic valve 703 is connected to the high-pressure gas cylinder 704.

[0042] In the embodiment, the power cabinet includes a main cabinet body 1 and a plurality of breaker mounting racks 101 arranged in multiple layers inside the main cabinet body 1, a cabinet door 3 is installed on the front opening of the main cabinet body 1 through a hinge 301, a vertical guide rail 302 and a vertically arranged screw rod 303 are arranged on the inner side of the cabinet door 3, the top end of the screw rod 303 is connected to a driving motor 304, a lifting fire extinguishing rack 4 is connected to the screw rod transmission system through a guide rail sliding mechanism, when the driving motor 304 drives the vertical screw rod 303 to rotate, the driving screw sleeve 406 embedded in the lifting fire extinguishing rack 4 converts the rotary motion into linear motion, so that the lifting fire extinguishing rack 4 is accurately lifted along the guide rail to the front of any breaker mounting rack 101, a longitudinal fixed conveying pipe 6 is fixed in the center of the lifting fire extinguishing rack 4, and horizontal conveying pipes 602 with uniformly distributed horizontal nozzles 603 are symmetrically extended from both sides of the fixed conveying pipe 6, a temperature sensor 102 is embedded in the middle of each breaker mounting rack 101 to monitor the temperature of the equipment 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 conveying pipe 6 through the normally closed electromagnetic valve 703 and the conveying hose 7, when a breaker mounting rack 101 catches fire 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, and can receive monitoring data of the temperature sensor 102 embedded in the middle of each breaker mounting rack 101 in real time, the temperature sensor 102 at the fire point detects an abnormally high temperature signal and transmits it to the central controller in real time, the controller calculates the target mounting rack coordinates according to the sensor number, outputs a pulse signal to a servo driver, and drives the driving motor 304 to accurately rotate the vertical screw rod 303, so that the lifting fire extinguishing rack 4 moves along the guide rail to the front of the mounting rack on fire, after the lifting frame is in place, the controller synchronously opens the normally closed electromagnetic valve 703, and the fire extinguishing agent in the high-pressure gas cylinder 704 is injected into the fixed conveying pipe 6 in the center of the lifting fire extinguishing rack 4 through the conveying hose 7, is branched to the horizontal conveying pipes 602 with horizontal nozzles 603 on both sides, is concentratedly sprayed to the core area of the fire point, is sprayed to the core area of the fire point at a close distance and in a directional manner through the horizontal nozzles 603, and the system automatically closes the electromagnetic valve and resets the lifting fire extinguishing rack 4 after the fire is extinguished, so that the power cabinet adopts the lifting fire extinguishing rack 4 which can slide to adjust the position, can quickly and accurately position the fire point, and can extinguish the fire by accurately spraying the fire extinguishing agent, thereby improving the fire extinguishing efficiency, can locally process the specific fire point, reduces the unnecessary amount of fire extinguishing agent, and maximally protects the safety of the equipment in the surrounding unaffected area.

[0043] As 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 adds rotary joints 601 at both ends of the fixed delivery pipe 6 of the lifting fire extinguisher 4, allowing the horizontal delivery pipe 602 to rotate freely around the vertical axis. A half-tooth gear 604 is coaxially fixed to the outside of the rotary joint 601, with its toothed area covering 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 extinguisher 4 moves along the guide rail, the half-tooth gear 604 intermittently meshes with the vertical rack 305. Thus, when the lifting fire extinguisher slides along the guide rail, the toothless area of ​​the half-tooth gear 604 slides over the rack, and the horizontal nozzle 603 remains tilted downwards. Meanwhile, the toothed area of ​​the half-tooth gear 604 meshes with the rack, and the gear rotation drives the horizontal delivery pipe 602 to rotate upwards and unfold, thereby causing the horizontal nozzle 603 to tilt upwards accordingly. A reset spring 605 is set on the shaft of the gear 604. When the horizontal nozzle 603 tilts upward, the spring stores energy. When the toothless area disengages from the rack, the spring releases torque to automatically reset the horizontal nozzle 603 to the downward tilt position. This allows the horizontal nozzle 603 to swing up and down periodically to cover the ignition point and improve fire extinguishing efficiency. The upper end of the delivery hose 7 is wound around the outside of the retrieval reel 701 set at the top of the main cabinet 1. The retrieval reel 701 is rotatably connected to the main cabinet 1. A retrieval spring 702 is connected to the shaft end of the retrieval reel 701. When the lifting fire extinguishing frame 4 slides up and down, the delivery hose 7 can be released or retrieved synchronously through the retrieval reel 701, which facilitates the storage of the delivery hose 7 and allows the cabinet door 3 of the power cabinet to be opened normally.

[0044] 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 drive screw 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 correspondingly set the power-on locking mechanism 5, which includes the horizontal locking sleeve 501 on the side wall of the connecting sleeve 405, the built-in slidable magnetic locking pin 502, the trailing spring 503, the connecting locking groove 407 on the side wall of the drive screw 406, the locking electromagnet 504 at the rear end of the locking sleeve, and the middle of the lifting fire extinguishing frame 4 is provided with the connecting sleeve 405, the drive screw 406 is nested and slidably arranged inside the connecting sleeve 405, the locking electromagnet 504 generates a magnetic repulsion force in the power-on state, which pushes the magnetic locking pin 502 to overcome the spring resistance and embeds the locking groove of the drive screw 406, realizing rigid connection, in the power-off state, the electromagnet loses power, the magnetic locking pin 502 is pulled back by the traction spring 503, the drive screw 406 and the connecting sleeve 405 are automatically separated, the lifting fire extinguishing frame 4 and the sliding contact of the vertical guide rail 302 are provided with a damping friction wheel 401, the wheel surface of which is constantly pressed against the side surface of the guide rail to generate a controllable frictional resistance, when the main circuit is powered off due to fire, the power-on locking mechanism 5 is automatically released, the drive screw 406 is separated from the lifting fire extinguishing frame 4, and 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, and the normally closed electromagnetic valve 703 remains normally closed when powered on and opens when powered off, so that the normally closed electromagnetic valve 703 can be opened synchronously, the extinguishing agent is delivered to the horizontal nozzle 603 through the delivery hose 7, the lifting frame slides evenly through all the circuit breaker mounting frames 101, the nozzle continuously sprays the extinguishing agent downward, realizing global coverage of the cabinet, thereby realizing power failure without dead machine, solving the fatal defect of traditional electric fire extinguishing device that is paralyzed when powered off, and ensuring that the global fire extinguishing can still be performed in the absence of electricity. The sliding process passes through each layer of mounting frame in turn, and cooperates with continuous spraying to realize uniform distribution of the extinguishing agent, avoid missing hidden fire sources, and the extinguishing system circuit is physically isolated from the cabinet main circuit, and is provided with a dedicated battery pack.

[0045] As 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 front of each breaker mounting rack 101 on the upper side, the core components include a horizontal traction rope 201 made of a fusible material, such as a modified nylon + graphene composite core material with a melting point of about 150 degrees Celsius, which traverses the front of the mounting rack, and a two-way limiting system, the two ends of the traction rope are turned by guide rollers 202 and connected to horizontal limiting pins 204 on both sides of the mounting rack, the positioning and limiting mechanism 2 further includes a limiting guide sleeve 203 arranged in the middle of the vertical guide rail 302, the limiting pin is nested in the limiting guide sleeve 203, and a limiting spring 205 is arranged in the middle, when the traction rope is tensioned, the limiting pin is pulled back into the guide sleeve against the spring resistance, when the traction rope is fused due to fire, the spring instantaneously releases the pushing force to drive the limiting pin to pop out, and when there is no fire alarm, the traction rope restricts the limiting pin to retract, and the lifting fire extinguishing rack 4 freely passes through, when the traction rope is fused by high temperature of the fire, the limiting pins on both sides pop out to form a physical barrier wall, and the lifting rack is positioned downward, when the lifting fire extinguishing rack 4 touches the limiting pin, mechanical stopping is triggered, mechanical and electronic double-redundancy positioning is realized, and the overall reliability and safety are higher.

[0046] As shown in 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 , preferably, the power cabinet is provided with a unit tripping device 8 in front of each breaker mounting rack 101, the unit tripping device 8 includes a horizontal support 802 connected with the cabinet door 3, a sliding guide rail 805 is vertically arranged in the middle of the horizontal support 802, a counterweight sliding block 9 is slidingly connected and arranged outside the sliding guide rail 805, an arc-shaped locking groove 901 is arranged in the middle of the counterweight sliding block 9, an arc-shaped elastic piece 806 is arranged in the middle of the sliding guide rail 805, and the arc-shaped elastic piece 806 and the arc-shaped locking groove 901 are arranged in mutual cooperation, the elastic piece is clamped into the arc-shaped locking groove 901 in normal state to form mechanical self-locking, a tripping lever 904 is arranged on the side of the counterweight sliding block 9 close to the breaker mounting rack 101, a touch lever 402 is arranged on the side of the lifting fire extinguishing rack 4 close to the horizontal support 802, the touch lever 402 and the counterweight sliding block 9 are arranged in mutual cooperation, the counterweight sliding block 9 is pushed by the touch lever 402 when the lifting fire extinguishing rack 4 slides downward, at this time, the arc-shaped elastic piece 806 is elastically deformed to disengage from the locking groove to be unlocked, the counterweight sliding block 9 slides downward along the sliding guide rail 805, and then drives the tripping lever 904 to move downward synchronously, so that the tripping lever 904 accurately impacts the breaker operating handle to forcibly open the circuit, realizes automatic tripping and power-off of the circuit breaker, and the overall reliability and safety are higher.

[0047] As 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 , preferably, the electric power cabinet touch rod 402 is connected with the lifting fire extinguishing frame 4 through the rear end of the connecting shaft 403, the middle of the connecting shaft 403 is provided with a reset folding spring 404, so that when the lifting fire extinguishing frame 4 drives the counterweight sliding block 9 to continue to slide downward, the reset folding spring 404 is turned up by a certain angle to make room, and the lifting fire extinguishing frame 4 continues to slide downward through the counterweight sliding block 9 driven by the lifting fire extinguishing frame 4, and after the lifting frame, the folding spring releases energy to make the rod automatically reset to the horizontal standby position. The reset folding spring 404 provides a turning mechanism to ensure that the lifting fire extinguishing frame 4 can continue to descend to the fire layer without obstruction after driving the counterweight sliding block 9 to complete the breaking, solving the problem of rigid structure jamming. The counterweight sliding block 9 and the breaking rod 904 are connected through the horizontal telescopic rod 902, and the middle of the horizontal telescopic rod 902 is provided with a buffer spring 903, so that when the rod hits the breaker handle, the impact force compresses the buffer spring 903, the spring absorbs kinetic energy and converts it into elastic potential energy to release, so that the buffer spring 903 converts the breaking impact force into a continuous and smooth pushing force, avoiding the deformation or fracture of the breaker handle due to instantaneous impact, and prolonging the service life of the equipment.

[0048] As 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 unit breaker 8 also comprises lateral guide rails 801 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 support 802 are provided with connecting sliding grooves 803, the horizontal support 802 is slidably connected with the lateral guide rails 801 through the connecting sliding grooves 803, and the middle of the connecting sliding grooves 803 is rotatably provided with a locking bolt 804, so that the horizontal support 802 can be slid up and down to adjust the position according to the requirements, so that the tripping lever 904 is located at a suitable position, the tripping lever 904 is accurately matched with the operating handle of the circuit breaker of different height and type, and is fixed after adjustment through the locking bolt 804, so that the use is more flexible and convenient.

[0049] The power cabinet with the automatic fire extinguishing device provided by the application can move the lifting fire extinguishing frame 4 to the front of the installation frame through the guide rails, then open the normally closed electromagnetic valve 703, and then the fire extinguishing agent in the high-pressure gas cylinder 704 is injected into the fixed conveying pipe 6 in the center of the lifting fire extinguishing frame 4 through the conveying hose 7, is branched to the horizontal conveying pipes 602 on the two sides with horizontal spray heads 603, is concentratedly sprayed to the core area of the fire starting point, is close-range and directional sprayed to the core area of the fire starting point by the horizontal spray heads 603, can be quickly and accurately positioned to the fire starting point, and can extinguish the fire by accurately spraying the fire extinguishing agent, thereby improving the fire extinguishing efficiency, can locally treat the specific fire starting point, reduces unnecessary use amount of the fire extinguishing agent, and maximally protects the safety of the equipment in the surrounding unaffected area.

[0050] Those skilled in the art should understand that the above discussion of any embodiment is only exemplary and is not intended to imply that the scope of the application is limited to these examples; under the idea of the application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the application as described above. In order to be brief, they are not provided in details. Any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. An electric power cabinet with automatic fire extinguishing device, comprising a main cabinet body (1), the inside of the main cabinet body (1) is arranged with a plurality of circuit breaker mounting racks (101), characterized in that, Also include: Cabinet door (3) is provided on the front opening outside of the main cabinet body (1), the cabinet door (3) is rotatably connected with the main cabinet body (1) through the hinge (301) provided on the vertical side, the left and right sides of the cabinet door (3) are symmetrically provided with vertical guide rails (302), the inner side of the vertical guide rail (302) is provided in parallel with vertical screw rod (303), the shaft end of the vertical screw rod (303) is connected with the drive motor (304); Lifting fire extinguishing frame (4) is provided on the outer side of the vertical guide rail (302), the lifting fire extinguishing frame (4) is slidably connected with the vertical guide rail (302), the middle of the lifting fire extinguishing frame (4) is provided with a drive screw (406), the lifting fire extinguishing frame (4) is connected with the vertical screw rod (303) through the drive screw (406), the drive 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 drive screw (406) to pass in front of the plurality of circuit breaker mounting racks (101) in turn; Fixed conveying pipe (6) is provided at the center of the lifting fire extinguishing frame (4), the left and right ends of the fixed conveying pipe (6) are symmetrically connected with horizontal conveying pipe (602), a plurality of horizontal nozzles (603) are uniformly arranged in the middle of the horizontal conveying pipe (602), and the middle of the circuit breaker mounting rack (101) is provided with a temperature sensor (102); The conveying hose (7) is connected above the fixed conveying pipe (6), the upper end of the conveying hose (7) is connected with a normally closed electromagnetic valve (703), and the outer end of the normally closed electromagnetic valve (703) is connected with a high-pressure gas cylinder (704); The front side of the circuit breaker mounting rack (101) is provided with a unit breaker (8), the unit breaker (8) comprises a horizontal support (802), the horizontal support (802) is connected with the cabinet door (3), the middle of the horizontal support (802) is vertically provided with a sliding guide rail (805), the outer side of the sliding guide rail (805) is slidably connected with a counterweight sliding block (9), the middle of the counterweight sliding block (9) is provided with an arc-shaped locking groove (901), the middle of the sliding guide rail (805) is provided with an arc-shaped elastic sheet (806), the arc-shaped elastic sheet (806) and the arc-shaped locking groove (901) are matched with each other, one side of the counterweight sliding block (9) close to the circuit breaker mounting rack (101) is provided with a tripping lever (904), one side of the lifting fire extinguishing frame (4) close to the horizontal support (802) is provided with a touch lever (402), the touch lever (402) and the counterweight sliding block (9) are matched with each other, when the lifting fire extinguishing frame (4) slides downward, the touch lever (402) pushes the counterweight sliding block (9) to slide downward along the sliding guide rail (805), and then drives the tripping lever (904) to move downward synchronously.

2. The power cabinet with automatic fire extinguishing device according to claim 1, characterized in that, The left and right ends of the fixed conveying pipe (6) are also symmetrically provided with rotary joints (601), the horizontal conveying pipe (602) is rotationally connected with the fixed conveying pipe (6) through the rotary joints (601), the outer side of the rotary joint (601) is provided with a half-tooth gear (604), the inner side of the cabinet door (3) is provided with a vertical rack (305) in the middle, the vertical rack (305) and the half-tooth gear (604) are in meshing connection with each other, and the middle of the half-tooth gear (604) is connected with a reset coil spring (605).

3. The power cabinet with automatic fire extinguishing device according to claim 1, characterized in that, The upper end of the conveying hose (7) is wound outside the recycling winding wheel (701) arranged at the top end of the main cabinet body (1), the recycling winding wheel (701) is rotationally connected with the main cabinet body (1), and the shaft end of the recycling winding wheel (701) is connected with a recycling winding spring (702).

4. The power cabinet with automatic fire extinguishing device according to claim 1, characterized in that, The middle of the lifting fire extinguishing frame (4) is provided with a connecting sleeve (405), the drive screw sleeve (406) is slidingly arranged in the inner side of the connecting sleeve (405), the drive screw sleeve (406) is connected with the lifting fire extinguishing frame (4) through the connecting sleeve (405), and the sidewall middle of the connecting sleeve (405) is provided with a power locking mechanism (5) corresponding to the sidewall middle of the drive screw sleeve (406).

5. The power cabinet with automatic fire extinguishing device according to claim 4, characterized in that, The power locking mechanism (5) comprises a horizontal locking sleeve (501) arranged in the sidewall middle of the connecting sleeve (405), the inner side of the horizontal locking sleeve (501) is slidingly nested with a magnetic locking pin (502), the power locking mechanism (5) further comprises a connecting locking groove (407) arranged in the sidewall middle of the drive screw sleeve (406), the connecting locking groove (407) and the magnetic locking pin (502) are arranged in interfitting mode, the rear side of the magnetic locking pin (502) is provided with a traction spring (503), the rear end of the horizontal locking sleeve (501) is provided with a locking electromagnet (504), when the locking electromagnet (504) is electrified, the magnetic locking pin (502) is repelled by magnetic force to slide forward to stretch the traction spring (503) and is embedded in the connecting locking groove (407) to be locked, and when the locking electromagnet (504) is de-energized, the traction spring (503) pulls the magnetic locking pin (502) to slide backward to be separated from the connecting locking groove (407) to be unlocked.

6. The power cabinet with automatic fire extinguishing device according to claim 1, characterized in that, The front upper side of the circuit breaker mounting frame (101) is provided with a positioning limiting mechanism (2) in parallel, the positioning limiting mechanism (2) comprises a horizontal traction rope (201), the horizontal traction rope (201) is provided on the front upper side of the circuit breaker mounting frame (101) in parallel, the horizontal traction rope (201) is made of a fusible material, the left and right ends of the circuit breaker mounting frame (101) are slidably connected with horizontal limiting pins (204), the horizontally limiting pins (204) are symmetrically arranged and are pulled by the horizontal traction rope (201), when the horizontal traction rope (201) is fused, the horizontally limiting pins (204) are pulled out to hinder the sliding of the lifting fire extinguishing frame (4).

7. The power cabinet with automatic fire extinguishing device according to claim 6, characterized in that, The positioning limiting mechanism (2) further comprises a limiting guide sleeve (203) arranged in the middle of the vertical guide rail (302), the outer end of the limiting guide sleeve (203) is provided with a guide roller (202), the inner side of the limiting guide sleeve (203) is slidably nested with the horizontal limiting pin (204), the middle of the horizontal limiting pin (204) is provided with a limiting spring (205), the left and right ends of the horizontal traction rope (201) are guided to extend to the limiting guide sleeve (203) through the guide roller (202) and are connected with the horizontal limiting pin (204), the horizontally limiting pins (204) symmetrically arranged on the left and right sides are connected with each other through the horizontal traction rope (201) and are limited to retract 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, The touch lever (402) is rotatably connected with the lifting fire extinguishing frame (4) through the connecting shaft (403) arranged at the rear end, the middle of the connecting shaft (403) is provided with a reset coil spring (404), the counterweight sliding block (9) and the tripping lever (904) are connected with each other through the horizontal telescopic rod (902), the middle of the horizontal telescopic rod (902) is provided with a buffer spring (903).

9. The power cabinet with automatic fire extinguishing device according to claim 8, characterized in that, The unit tripper (8) further comprises a lateral guide rail (801), the lateral guide rail (801) is 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 support (802) are provided with connecting sliding grooves (803), the horizontal support (802) is slidably connected with the lateral guide rail (801) through the connecting sliding grooves (803), the middle of the connecting sliding groove (803) is rotatably provided with a locking bolt (804).

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