Fire extinguishing device for electrical equipment

Abstract

The invention relates to the field of fire extinguishing equipment, in particular to a fire extinguishing device for electrical equipment. The fire extinguishing device for the electrical equipment comprises a box body, a box door is rotatably connected to the box body, a gas storage box is fixedly connected to the top of the box body, a gas inlet valve and a gas outlet valve which are symmetrically distributed are installed on the side wall of the gas storage box, and gas outlet pipes which are symmetrically distributed are arranged between the bottom wall of the gas storage box and the top wall of the box body; a protective shell is fixedly connected to the top of the air storage box, a space cavity used for installing equipment is formed between the protective shell and the air storage box, and an exhaust valve is arranged at the position, close to the bottom, of the box body. Fire extinguishing is carried out through fire monitoring and inert gas cooperation, and response is rapid; the pulling assembly is matched with the balancing weight to improve the fire extinguishing efficiency; a heat dissipation hole and air outlet pipe sealing assembly guarantees the fire extinguishing effect; the uniform gas outlet assembly realizes full-space fire extinguishing; the gravel box and the pull curtain assembly protect the box body and provide a flat platform, the service life of equipment is prolonged, and safety and applicability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrical equipment, in particular to a fire extinguishing device for electrical equipment. BACKGROUND

[0002] In industrial production and civil facilities, electrical equipment is prone to fire due to long-term high-load operation, line aging or short circuit, etc. Such fires often produce smoke at the initial stage, but the fire spreads rapidly. If not controlled in time, not only will the equipment be damaged, but also secondary disasters such as electric shock and explosion may occur, posing a serious threat to personnel safety.

[0003] At present, the fire extinguishing devices for electrical equipment on the market still have many shortcomings: first, most devices rely on manual triggering or single temperature sensing, and the response to initial smoke signals is slow, making it difficult to suppress the fire in time; second, traditional fire extinguishing media (such as dry powder or water-based materials) have obvious defects. Dry powder can easily corrode precision electronic components, while water-based media may cause electrical short circuits and exacerbate accident risks. In addition, after extinguishing the fire, there is a lack of effective ventilation opening sealing mechanism, and external oxygen is easy to re-enter the interior of the equipment, resulting in a high probability of reignition. On the other hand, the existing fire extinguishing devices mostly use exposed design for the air outlet pipe, which is prone to deformation due to external force during long-term use, or internal blockage due to dust and oil accumulation, seriously affecting the injection efficiency of the fire extinguishing medium. At the same time, some integrated fire extinguishing devices have complex structures, making installation and maintenance inconvenient, and are difficult to adapt to electrical equipment of different specifications, with poor applicability.

[0004] Based on the above situation, there is an urgent need for a new type of fire extinguishing device that can quickly respond to smoke signals, use inert gas to extinguish the fire to avoid secondary damage, and have an automatic ventilation opening sealing function to effectively prevent reignition. SUMMARY

[0005] In order to overcome the shortcomings of the existing fire extinguishing devices, such as slow response, strong corrosion of the medium, easy reignition and easy damage and blockage of the pipe, the technical problem to be solved is to provide a fire extinguishing device for electrical equipment.

[0006] Technical scheme: A fire extinguishing device for electrical equipment, comprising a box body, a box door rotatably connected to the box body, a gas storage tank fixed to the top of the box body, symmetrical inlet valves and outlet valves installed on the side wall of the box body, symmetrical outlet pipes between the bottom wall of the gas storage tank and the top wall of the box body, a protective shell fixed to the top of the gas storage tank, a space cavity formed between the protective shell and the gas storage tank for installing equipment, an exhaust valve provided on the box body near the bottom, a plurality of rectangular heat dissipation holes opened on the symmetrical side walls of the box body, a smoke sensor installed on the inner side of the top wall of the box body, a first sliding frame slidably connected to the top wall of the gas storage tank, and a pulling assembly provided in the space cavity for controlling the vertical movement of the first sliding frame.

[0007] In one embodiment, the pulling assembly includes a mounting bracket fixed to the top of the air storage box, the top of the mounting bracket is rotatably connected to symmetrically distributed rotating frames, each of which is wound with a pull rope, and the movable end of each pull rope is fixed to the first sliding frame, and a belt is wound between the symmetrically distributed rotating frames. A motor is installed on the mounting bracket, and its output shaft is fixed to the adjacent rotating frame through a coupling. The smoke sensor is electrically connected to the motor through a control module, and a counterweight is provided on the first sliding frame.

[0008] In one embodiment, a sliding member is slidably connected to the top wall of the box body, and a symmetrically distributed closing member is fixed to the bottom of the sliding member. A telescopic frame is slidably connected to the inside of the first sliding frame, and a plurality of first springs are connected between the telescopic frame and the first sliding frame. Each first spring is wound around the telescopic frame, and the bottom of the telescopic frame contacts the top of the sliding member. The sliding member is provided with a locking component for limiting its position.

[0009] In one embodiment, the locking assembly includes a pin lock symmetrically connected to the sliding member, and the inner wall of the box body is provided with a socket on the side close to the pin lock. A second spring is connected between each pin lock and the sliding member, and is respectively wound around the adjacent pin lock.

[0010] In one embodiment, a symmetrically distributed second sliding frame is slidably connected to the inner side of the bottom wall of the air storage box, a sealing sleeve is fixed to the side of the second sliding frame close to the air outlet pipe, and a connecting rod is provided between the symmetrically distributed second sliding frame and the sliding member.

[0011] In one embodiment, the box body is rotatably connected to an air outlet piece near the air outlet pipe, each air outlet piece is provided with a nozzle evenly distributed vertically, a threaded sleeve is provided in the middle of each air outlet piece, and each closing piece is fixed with an extrusion piece on the side close to the threaded sleeve, and the end portion thereof is embedded in the external thread groove of the threaded sleeve. The inner wall of the box body is fixed with a sealing piece on the side close to the air outlet piece, which is initially tightly fitted with the nozzle of the air outlet piece.

[0012] In one embodiment, the nozzle adopts a Venturi tube structure.

[0013] In one embodiment, a sand and gravel box is provided at the bottom of the box body.

[0014] In one of the embodiments, a rotating roller is rotatably connected in the bottom wall of the box body, the folding cloth is wound around the rotating roller, symmetrical torsion springs are connected between the rotating roller and the box body, and the active end of the rotating roller is fixedly connected with a third sliding frame.

[0015] The application has the advantages that: the application can quickly respond to fire by monitoring fire and cooperating with inert gas fire extinguishing, the pull assembly and the counterweight block cooperate to realize high-speed injection of inert gas, and the fire extinguishing efficiency is improved; the heat dissipation hole sealing assembly considers normal heat dissipation of the equipment and rapid sealing when fire occurs, avoids air replenishment and inert gas loss, and accelerates fire extinguishing; the gas outlet pipe sealing assembly prevents inert gas leakage and ensures effective supply during fire extinguishing; the uniform gas outlet assembly realizes multi-directional gradient injection, so that the inert gas uniformly covers each area of the box body, and the whole space is ensured to be extinguished; the sandstone box and the pull curtain assembly protect the box body from being damaged by plastic liquid drops, provide a flat installation platform, prolong the service life of the electrical equipment as a whole, and improve safety and applicability. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the application.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the gas storage tank, motor, pull rope and other components of the application.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the first sliding frame, telescopic frame, sliding member and other components of the application.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the gas outlet member, sealing member, threaded sleeve and other components of the application.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting rod, second sliding frame, sealing sleeve and other components of the application.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the folding cloth, lock piece and third sliding frame and other components of the application.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the torsion spring, folding cloth and rotating roller and other components of the application.

[0023] In the drawing marks: 1: box, 11: gas storage tank, 12: protective shell, 121: mounting bracket, 13: sandstone tank, 14: tank door, 15: air inlet valve, 16: air outlet valve, 17: exhaust valve, 2: motor, 21: rotating frame, 22: pull rope, 23: belt, 24: first sliding frame, 25: telescopic frame, 26: first spring, 27: sliding piece, 271: closure, 28: pin tumbler lock, 29: second spring, 210: smoke sensor, 3: air outlet, 31: sealing element, 32: extrusion piece, 33: threaded sleeve, 34: connecting rod, 35: second sliding frame, 36: sealing sleeve, 4: lock element, 41: third sliding frame, 42: folding cloth, 43: rotating roller, 44: torsional spring. DETAILED DESCRIPTION

[0024] The present application is described in detail below in conjunction with the accompanying drawings and specific embodiments, but is not limited to the present application.

[0025] Example 1: a fire extinguishing device for electrical equipment, as shown in Figure 1 and Figure 2 shown, comprising a box 1, the overall structure is used to protect the internal electrical equipment and components, through the synergy of fire monitoring and inert gas fire extinguishing, to ensure the normal operation of electrical equipment and components and prolong the service life; the box 1 is rotatably connected with the tank door 14, the tank door 14 can realize the closing and opening of the box 1 by rotating, which is convenient for the installation, maintenance and maintenance of electrical equipment and components; the top of the box 1 is fixedly connected with the gas storage tank 11, and the side wall is provided with symmetrically distributed air inlet valve 15 and air outlet valve 16, the air inlet valve 15 is used for introducing inert gas into the gas storage tank 11, and the air outlet valve 16 is used for synchronously discharging the air in the gas storage tank 11, so as to ensure that the gas storage tank 11 can store high-purity inert gas.

[0026] The bottom wall of the gas storage tank 11 and the top wall of the box 1 are provided with symmetrically distributed air outlet pipes, which are used as the conveying channel of inert gas, for accurately guiding the inert gas in the gas storage tank 11 into the box 1 through the air outlet pipe, realizing the directional conveying of fire extinguishing gas; the top of the gas storage tank 11 is fixedly connected with the protective shell 12, and the space cavity for installing equipment is formed between the protective shell 12 and the gas storage tank 11, the protective shell 12 can effectively block the interference and damage of the external environment to the equipment in the space cavity, and plays a protective role; the box 1 is provided with an exhaust valve 17 near the bottom, which is used for discharging the air in the box 1 in time after the inert gas is injected into the box 1 by high pressure, so as to accelerate the formation of anoxic environment to inhibit the fire.

[0027] The box 1 is symmetrically provided with a plurality of rectangular heat dissipation holes on the side walls, which can dissipate the heat generated by the electrical equipment and elements during normal operation of the equipment, and maintain the appropriate working temperature inside the box 1; the inside of the top wall of the box 1 is provided with a smoke sensor 210, which can monitor the change of smoke in the box in real time and provide data support for fire warning; the top wall of the gas storage tank 11 is slidably connected with a first sliding frame 24, which can generate pressure by vertical sliding to press the inert gas in the gas storage tank 11 into the box 1 for fire extinguishing; the space cavity is provided with a pulling assembly for controlling the vertical movement of the first sliding frame 24, which can drive the first sliding frame 24 to complete the corresponding action according to the control instruction, so as to realize the release control of the inert gas.

[0028] Initially, the inert gas is filled into the gas storage tank 11 through the inlet valve 15, and the air in the tank is discharged through the outlet valve 16 at the same time, so that the gas storage tank 11 completes the preset storage of inert gas. When the electrical equipment or elements in the box 1 cause a fire due to short circuit or other faults, the smoke generated by the combustion will be captured by the smoke sensor 210 in real time. The smoke sensor 210 triggers the control instruction immediately, and drives the pulling assembly to drive the first sliding frame 24 to move downward quickly.

[0029] The first sliding frame 24 forms pressure in the gas storage tank 11 during the downward movement, forcing the inert gas to be sprayed into the box 1 at high speed through the outlet pipe. Since the inert gas (such as carbon dioxide) has a density greater than air, or a pressure difference is formed by continuous airflow (such as nitrogen), it will quickly occupy the space in the tank, and at the same time push the air in the tank to be discharged through the exhaust valve 17 and the gap, so that the oxygen concentration in the box 1 is quickly reduced to below the critical value of combustion, thereby terminating the combustion reaction and achieving rapid fire extinguishing.

[0030] The pulling assembly includes a mounting bracket 121 fixed to the top of the gas storage tank 11, which is used to provide stable mounting support for the entire pulling assembly; the top of the mounting bracket 121 is rotatably connected with symmetrically distributed rotating frames 21, each of which has a pull rope 22 wound thereon, and the rotating frame 21 can realize the winding and unwinding of the pull rope 22 by rotating; the movable end of each pull rope 22 is fixed to the first sliding frame 24, which is used to transmit tension to control the lifting of the first sliding frame 24; a belt 23 is wound between the symmetrically distributed rotating frames 21, which is used to realize the synchronous power transmission of the two rotating frames 21; the motor 2 is installed on the mounting bracket 121, which serves as a power source, and the output shaft is fixed to the adjacent rotating frame 21 through a coupling, which can drive the rotating frame 21 to rotate; the smoke sensor 210 and the motor 2 are electrically connected through a control module, forming a closed loop control link, realizing the conversion of fire signal to power output; the first sliding frame 24 is provided with a counterweight, which is used to increase the downward driving force and improve the injection speed of the inert gas.

[0031] When the smoke sensor 210 detects smoke in the box 1, the motor 2 is triggered to rotate forward by the control module, driving the adjacent rotating frame 21 to rotate synchronously, and the other rotating frame 21 is driven to rotate in the same direction through the belt 23. When the rotating frame 21 rotates, the pull rope 22 is released, and the first sliding frame 24 quickly descends under the combined action of the gravity of the counterweight and its own gravity, and the sealing surface forms a piston effect with the inner wall of the gas storage tank 11, so that the inert gas is pressed into the box 1 at high speed, and the fire is extinguished by reducing the oxygen concentration.

[0032] After the fire is extinguished, the smoke sensor 210 instructs the motor 2 to rotate in the opposite direction through the control module, driving the rotating frame 21 to rotate in the opposite direction to wind the pull rope 22, and pulling the first sliding frame 24 to ascend to reset, completing the reset action of the fire extinguishing cycle.

[0033] The heat dissipation holes on both sides of the box 1 need to be kept open during normal operation of the electrical equipment to dissipate the heat generated during operation of the equipment, avoid high temperature in the box affecting normal operation of the equipment and accelerating aging of the elements, and thus maintain the service life of the equipment. However, when the electrical equipment and elements in the box catch fire, if the heat dissipation holes are still in the open state, external air will enter the box through the heat dissipation holes to supplement oxygen, intensifying the spread of the fire, and the inert gas pressed into the box may flow out from the heat dissipation holes, reducing the fire extinguishing efficiency. Therefore, a sealing assembly needs to be designed to open the heat dissipation holes for heat dissipation during normal operation of the equipment and quickly seal the heat dissipation holes when the box catches fire, so that the box 1 is in a relatively closed space during fire extinguishing, accelerating the reduction of oxygen concentration and air exhaust speed in the box, to balance the heat dissipation requirement of the equipment and the fire extinguishing effect.

[0034] As shown in Figure 2 and Figure 3 , specifically, a sliding piece 27 is slidably connected to the top wall of the box 1, which is a bearing and transmission component of the sealing component, and the bottom of the sliding piece 27 is fixedly connected with symmetrically distributed sealing pieces 271, which are made of high-temperature-resistant sealing materials and are used for precisely fitting the heat dissipation holes to control the opening and closing of the heat dissipation holes; a telescopic frame 25 is slidably connected in the first sliding frame 24, which is located in the gas storage tank 11 and serves as a force transmission buffer component and can vertically extend and retract relative to the first sliding frame 24.

[0035] A plurality of first springs 26 are connected between the telescopic frame 25 and the first sliding frame 24, each first spring 26 is wound on the telescopic frame 25, and the first spring 26 is used to provide elastic buffer force to ensure that the telescopic frame 25 is in close contact with the sliding piece 27 and realizes reset; the bottom of the telescopic frame 25 is in contact with the top of the sliding piece 27, for transmitting the vertical force of the first sliding frame 24 to the sliding piece 27; the sliding piece 27 is provided with a clamping assembly for limiting the position of the sliding piece 27, which is used to fix the position of the sliding piece 27 in the normal state, so that the sealing pieces 271 remain in the non-sealing state.

[0036] In normal state, the clamping assembly limits the sliding piece 27, the closing piece 271 is in the non-closing position, and the heat dissipation hole is kept open, which ensures that the heat generated by the equipment in the box 1 is dissipated in time through the heat dissipation hole, and the temperature in the box is stable.

[0037] When the electrical equipment in the box 1 catches fire, the first sliding frame 24 moves downward under the action of gravity, driving the telescopic frame 25 to move downward synchronously. The telescopic frame 25 that moves downward exerts vertical pressure on the sliding piece 27, forcing the clamping assembly to release the limit, and the sliding piece 27 drives the closing piece 271 to move downward until the closing piece 271 completely matches the heat dissipation hole, realizing the sealing and closing of the heat dissipation hole, and forming a relatively closed space in the box 1.

[0038] At this time, the inert gas in the gas storage tank 11 is pressed into the box 1 by the first sliding frame 24, and because the heat dissipation hole is closed, the inert gas can efficiently extrude the air in the box to be discharged through the exhaust valve 17, accelerating the reduction of the oxygen concentration in the box to below the critical point of combustion, and quickly extinguishing the fire.

[0039] When the telescopic frame 25 stops moving after contacting the inner side of the bottom wall of the gas storage tank 11, the first sliding frame 24 continues to move downward and slides relative to the telescopic frame 25, and the first spring 26 is compressed and deformed.

[0040] After the fire is extinguished, the pull rope 22 pulls the first sliding frame 24 to move upward, the first spring 26 is elastically reset, driving the telescopic frame 25 to move upward synchronously with the first sliding frame 24, and then pushing the sliding piece 27 upward to the original position, and the sliding piece 27 is fixed under the action of the clamping assembly, the closing piece 271 is separated from the heat dissipation hole, and the heat dissipation hole returns to the open state.

[0041] The clamping assembly includes billiard locks 28 symmetrically connected to the sliding piece 27, and the inner wall of the box 1 is provided with a insertion hole on one side close to the billiard lock 28, which serves as a positioning groove and precisely matches the billiard lock 28. Through the plug-in cooperation of the billiard lock 28 and the insertion hole, the position of the sliding piece 27 is locked and unlocked. Each billiard lock 28 is connected with the sliding piece 27 and is wound around the adjacent billiard lock 28, and the second spring 29 is used to provide an elastic outward thrust for the billiard lock 28, ensuring that the billiard lock 28 is stably matched with the insertion hole. Each billiard lock 28 slides in the adjacent insertion hole, and through the cooperation of the billiard lock 28 and the insertion hole, the position of the sliding piece 27 is locked.

[0042] In normal state, the billiard lock 28 is inserted into the insertion hole in the inner wall of the box 1 under the action of the elastic force of the second spring 29, forming a mechanical lock, fixing the sliding piece 27 at the initial position, keeping the closing piece 271 in the non-closed state, and ensuring that the heat dissipation hole is normally ventilated.

[0043] When the sliding piece 27 is pressed downward by the telescopic frame 25, the pin tumbler 28 is driven to move downward synchronously, the pin tumbler 28 is separated from the insertion hole, and the second spring 29 is compressed and deformed by the inner wall of the box body 1. At this time, the inner wall of the box body 1 continuously presses the pin tumbler 28, so that the pin tumbler 28 remains in the inwardly contracted state, the sliding piece 27 is unlocked and drives the closure piece 271 to move downward, until the closure piece 271 completely blocks the heat dissipation hole.

[0044] After the fire is extinguished, the first sliding frame 24 drives the telescopic frame 25 to move upward and reset, and the closure piece 271 still blocks the heat dissipation hole. When the staff overhauls, the sliding piece 27 is manually lifted after the box door 14 is opened, and the closure piece 271 and the pin tumbler 28 are synchronously moved upward. When the pin tumbler 28 moves to the height of the insertion hole, the second spring 29 is elastically reset, pushes the pin tumbler 28 to slide outward and inserts into the insertion hole, relocks the sliding piece 27, so that the closure piece 271 is separated from the heat dissipation hole, and the ventilation function of the heat dissipation hole is restored, which is convenient for subsequent equipment maintenance and replacement operation.

[0045] In the prior art, the gas outlet pipe between the gas storage tank 11 and the box body 1 lacks a controllable opening and closing mechanism, so that the inert gas is easy to leak through the gas outlet pipe in the normal state, and the closed pressure storage state in the gas storage tank 11 cannot be maintained; if the gas outlet pipe cannot be opened in time in case of fire, the inert gas cannot be injected into the box body 1 efficiently, which affects the fire extinguishing effect. Therefore, a synchronous linkage closure assembly needs to be designed to realize the sealing and pressure maintaining of the gas outlet pipe in the normal state and the rapid opening of the gas outlet pipe in case of fire.

[0046] As shown in Figure 5 , specifically, the bottom wall inner side of the gas storage tank 11 is slidably connected with symmetrically distributed second sliding frames 35, which are used as moving carriers of the sealing piece 31 and are used for driving the sealing piece 31 to move synchronously by lateral sliding to realize the opening and closing control of the gas outlet pipe; the side close to the gas outlet pipe of each second sliding frame 35 is fixedly connected with a sealing sleeve 36, the sealing sleeve 36 is made of elastic sealing material and is used for tightly abutting the gas outlet pipe port in the normal state to close the channel and prevent the inert gas from leaking; the second sliding frames 35 and the sliding piece 27 are connected with a connecting rod 34, the connecting rod 34 is used as a force transmission medium and is used for converting the vertical displacement of the sliding piece 27 into lateral driving force of the second sliding frame 35; the sliding piece 27 is located directly below the first sliding frame 24 and moves vertically synchronously with the first sliding frame 24, and is used as an intermediate transmission component of linkage control.

[0047] In the normal state, the sealing sleeve 36 is tightly abutted with the gas outlet pipe port to completely close the gas outlet pipe, so that the inert gas in the gas storage tank 11 is in a high-pressure closed state and leakage is avoided.

[0048] When the smoke sensor 210 triggers the fire extinguishing program, the first sliding frame 24 moves downward, synchronously driving the sliding piece 27 to move vertically downward. During the downward movement of the sliding piece 27, the driving connecting rod 34 is deflected downward around the connecting point, so that the originally inclined connecting rod 34 gradually tends to be horizontal, and the second sliding frame 35 is pushed to slide horizontally along the bottom wall of the gas storage tank 11 away from the gas outlet pipe through linear transmission.

[0049] The second sliding frame 35 drives the sealing sleeve 36 to move outward synchronously, so that the sealing sleeve 36 is completely misaligned with the gas outlet pipe port, the gas outlet pipe channel is opened, and at this time the gas storage tank 11 and the tank 1 form a communication path through the gas outlet pipe. The pressure generated by the continuous downward movement of the first sliding frame 24 causes the inert gas in the gas storage tank 11 to be pressed into the tank 1 at high speed through the opened gas outlet pipe, realizing directional fire extinguishing.

[0050] Because the internal space of the tank 1 is large and the installation position of the electrical equipment is not fixed, the fire point distribution is uncertain. The existing inert gas enters from the top of the tank 1 through a single channel of the gas outlet pipe, which is affected by the gas density and sinking characteristics, and is easy to cause the air in the lower part of the tank 1 to be squeezed, causing the oxygen concentration in the lower part to be relatively high, which intensifies the fire of the lower fire point, and cannot realize rapid fire extinguishing in the whole space. Therefore, a uniform gas outlet assembly needs to be designed, which can make the inert gas quickly and uniformly fill the tank 1 through multi-directional and gradient injection, so as to ensure that each position fire point can be quickly covered and extinguished.

[0051] As shown in Figure 4 , specifically, the tank 1 is rotationally connected with a gas outlet piece 3 near the gas outlet pipe, which serves as a distribution and injection carrier of the inert gas, and can adjust the injection direction by rotation; each gas outlet piece 3 is vertically provided with uniformly distributed nozzles, the nozzles adopt a Venturi tube structure, and the throttling and pressurization effect of the Venturi tube is used to make the flow rate of the inert gas increase suddenly and the static pressure decrease when the inert gas passes through, so as to realize high-pressure injection; the middle part of each gas outlet piece 3 is provided with a threaded sleeve 33, each sealing piece 271 is fixedly connected with an extrusion piece 32 on the side close to the threaded sleeve 33, the extrusion piece 32 serves as a transmission intermediate, the end thereof is embedded in the external thread groove of the threaded sleeve 33, and linkage control of the sealing piece 271 and the gas outlet piece 3 is realized, and the threaded sleeve 33 forms transmission coupling with the extrusion piece 32 through the external thread groove, so as to convert vertical displacement into rotary power; the inner wall of the tank 1 is fixedly connected with a sealing piece 31 on the side close to the gas outlet piece 3, the sealing piece 31 adopts an elastic sealing material, and is tightly attached to the nozzle of the gas outlet piece 3 at the beginning, so as to close the nozzle to block dust and impurities from entering, and ensure the smoothness of the nozzle.

[0052] In the initial state, the nozzle of the air outlet member 3 faces the sealing member 31, and the sealing member 31 forms a dust-proof seal against the nozzle, preventing clogging by impurities. When the closure member 271 moves downward, it simultaneously drives the extrusion member 32 to move vertically downward. Because the end of the extrusion member 32 and the external thread groove of the threaded sleeve 33 form a spiral transmission, the downward-moving extrusion member 32 drives the threaded sleeve 33 to rotate, thereby driving the air outlet member 3 to rotate toward the interior of the housing 1 until the nozzle rotates to a 45° diagonal direction of the housing 1. At this time, the nozzle is disengaged from the sealing member 31 and is in the open state.

[0053] When the first carriage 24 squeezes the inert gas from the gas storage tank 11, the gas enters the outlet member 3 through the outlet pipe. Through the Venturi nozzles, which are distributed along a vertical gradient, the inert gas is pressurized and ejected using the throttling effect. Because the nozzles are oriented at a 45° diagonal angle and evenly distributed vertically, the inert gas rapidly diffuses throughout the tank 1, creating a fully covered inert gas atmosphere. This rapidly reduces the oxygen concentration at each location, enabling simultaneous extinguishing of fires at different heights and locations.

[0054] After the fire is extinguished, the sliding member 27 drives the closing member 271 to move upward, the extruding member 32 moves upward synchronously and drives the threaded sleeve 33 to rotate in the opposite direction, so that the air outlet member 3 is reset, and the nozzle is re-fitted and sealed with the sealing member 31 to ensure that the nozzle remains unobstructed when not in operation.

[0055] Example 2: When an electrical device within enclosure 1 catches fire, the burning plastic casing generates high-temperature plastic droplets, which drip onto the bottom wall of enclosure 1 and damage the primer. Even if enclosure 1 is made of metal, the droplets still require disposal. Therefore, a collection mechanism is required to capture the plastic droplets, protect the bottom wall of enclosure 1 from damage, and extinguish any plastic droplets with ignition points.

[0056] like Figure 1 As shown, specifically, a gravel box 13 is provided at the bottom of the box body 1. The gravel box 13 serves as a collection container for containing gravel, providing a collection carrier for plastic droplets. The gravel has good heat resistance and flame retardancy. When the electrical equipment in the box body 1 burns to produce plastic droplets, the droplets directly drip into the gravel. The gravel can isolate the droplets from contact with the bottom wall of the box body 1, avoiding damage to the bottom wall, and at the same time can quickly extinguish the fire points carried by the droplets to prevent secondary combustion.

[0057] Under normal circumstances, the gravel contained in gravel box 13 is in standby mode. If a fire breaks out in the electrical equipment inside box 1 and the plastic casing burns, producing hot plastic droplets, these droplets will fall directly onto the gravel inside box 13. The gravel's heat-insulating properties prevent the high temperature of the droplets from being transferred to the bottom wall of box 1, thereby protecting it from damage. If the droplets contain a fire point, the gravel will quickly isolate them from oxygen and absorb the heat, rapidly extinguishing the fire and preventing it from spreading.

[0058] In the normal state when installing electrical equipment, the fine sand in the sand box 13 at the bottom of the box 1 is directly exposed, and the electrical component equipment placed therein is easy to cause the sand to enter the inside of the component, causing damage to the electrical component. Therefore, a curtain pulling assembly needs to be designed to cover the sand in the sand box 13 in the normal state, so that the bottom wall of the box 1 forms a flat placement platform, facilitating the installation of electrical equipment.

[0059] As shown in Figure 6 and Figure 7 , specifically, the bottom wall of the box 1 is rotatably connected with a rotating roller 43, and the folding cloth 42 is wound around the rotating roller 43. The rotating roller 43 is the folding cloth 42 winding and unwinding core component, and the folding cloth 42 is wound and unwound by rotating. The folding cloth 42 is made of wear-resistant and flame-retardant material, which is used to cover the sand in the sand box 13 in the normal state to form a flat equipment placement surface. The rotating roller 43 is connected with symmetrically distributed torsional springs 44 between the box 1, which are wound around the rotating roller 43. The torsional springs 44 are used to store elastic potential energy to provide driving force for the rotating roller 43 to wind the folding cloth 42.

[0060] The movable end of the rotating roller 43 is fixedly connected with a third sliding frame 41, which is used as a traction component of the folding cloth 42 and slides longitudinally along the inside of the bottom of the box 1 to drive the folding cloth 42 to expand and contract synchronously. The air outlet 3 near the box door 14 is fixedly connected with a locking piece 4, and each locking piece 4 is provided with an arc-shaped clamping groove. The third sliding frame 41 is provided with a protruding column on the side close to the locking piece 4. The locking piece 4 is mechanically locked by cooperating with the protruding column through the arc-shaped clamping groove, which is used to lock the position of the third sliding frame 41 and keep the torsional spring 44 in pre-tightening deformation in the normal state. The arc-shaped clamping groove on each locking piece 4 is a positioning structure.

[0061] In the normal state, the protruding column of the third sliding frame 41 is clamped into the arc-shaped clamping groove of the locking piece 4, and the torsional spring 44 is in pre-tightening deformation. The folding cloth 42 is unfolded and covers the sand in the sand box 13, forming a flat platform at the bottom of the box 1, so as to prevent the sand from entering the inside of the component when installing electrical equipment.

[0062] When the electrical equipment in the box 1 catches fire, the air outlet 3 rotates 45° in the diagonal direction of the box 1, synchronously driving the locking piece 4 to rotate, so that the arc-shaped clamping groove and the protruding column are disengaged. The torsional spring 44 releases the elastic potential energy to drive the rotating roller 43 to rotate, wind the folding cloth 42 and pull the third sliding frame 41 to slide backward. The folding cloth 42 is collected from above the sand box 13, and the sand is exposed to accept the plastic droplets produced by burning, protecting the bottom wall of the box 1.

[0063] After the fire is extinguished, the plastic liquid in the sand box 13 is cleaned, the third sliding frame 41 is manually pulled forward to the initial position, and the folding cloth 42 is unfolded; when the air outlet 3 is reset in the reverse rotation, the buckle 4 is synchronously rotated, the arc-shaped clamping groove is re-clamped into the protruding column, the third sliding frame 41 is locked, and the torsional spring 44 returns to the pre-tightening state, and the folding cloth 42 covers the sand again to form a flat platform.

[0064] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A fire extinguishing device for electrical equipment, comprising a housing (1), a door (14) being rotatably connected to the housing (1), and characterized in that: The top of the box body (1) is fixedly connected to an air storage box (11), and symmetrically distributed air inlet valves (15) and air outlet valves (16) are installed on the side walls thereof. A symmetrically distributed air outlet pipe is provided between the bottom wall of the air storage box (11) and the top wall of the box body (1). The top of the air storage box (11) is fixedly connected to a protective shell (12), and a space cavity for installing equipment is formed between the protective shell (12) and the air storage box (11). The box body (1) is provided with an exhaust valve (17) near the bottom. The symmetrically arranged side walls of the box body (1) are provided with a plurality of rectangular heat dissipation holes. A smoke sensor (210) is installed on the inner side of the top wall of the box body (1). The top wall of the air storage box (11) is slidably connected to a first sliding frame (24), and a pulling component for controlling the vertical movement of the first sliding frame (24) is provided in the space cavity.

2. A fire extinguishing device for electrical equipment according to claim 1, characterized in that: The pulling assembly includes a mounting bracket (121) fixed to the top of the gas storage box (11); the top of the mounting bracket (121) is rotatably connected to symmetrically distributed rotating frames (21), each of which is wound with a pull rope (22); the movable end of each pull rope (22) is fixed to a first sliding frame (24); a belt (23) is wound between the symmetrically distributed rotating frames (21); a motor (2) is mounted on the mounting bracket (121); the output shaft of the motor (2) is fixed to an adjacent rotating frame (21) through a coupling; the smoke sensor (210) is electrically connected to the motor (2) through a control module; and a counterweight is provided on the first sliding frame (24).

3. A fire extinguishing device for electrical equipment according to claim 2, characterized in that: A sliding member (27) is slidably connected to the top wall of the box body (1), and symmetrically distributed closing members (271) are fixed to the bottom of the sliding member (27). A telescopic frame (25) is slidably connected to the inside of the first sliding frame (24). A plurality of first springs (26) are connected between the telescopic frame (25) and the first sliding frame (24). Each first spring (26) is wound around the telescopic frame (25). The bottom of the telescopic frame (25) contacts the top of the sliding member (27). The sliding member (27) is provided with a positioning assembly for limiting the position thereof.

4. A fire extinguishing device for electrical equipment according to claim 3, characterized in that: The locking assembly comprises a pin lock (28) symmetrically connected to a sliding member (27). The inner wall of the box (1) is provided with a socket on a side close to the pin lock (28). A second spring (29) is connected between each pin lock (28) and the sliding member (27) and is respectively wound around the adjacent pin lock (28).

5. A fire extinguishing device for electrical equipment according to claim 4, characterized in that: A symmetrically distributed second sliding frame (35) is slidably connected to the inner side of the bottom wall of the air storage box (11), a sealing sleeve (36) is fixedly connected to the side of the second sliding frame (35) close to the air outlet pipe, and a connecting rod (34) is provided between the symmetrically distributed second sliding frame (35) and the sliding member (27).

6. A fire extinguishing device for electrical equipment according to claim 5, characterized in that: The box body (1) is rotatably connected to an air outlet member (3) near the air outlet pipe. Each air outlet member (3) is provided with a nozzle evenly distributed vertically. A threaded sleeve (33) is provided in the middle of each air outlet member (3). Each closure member (271) is fixedly connected to an extrusion member (32) on one side near the threaded sleeve (33), and its end is embedded in the external thread groove of the threaded sleeve (33). The inner wall of the box body (1) is fixedly connected to a sealing member (31) on one side near the air outlet member (3), and initially fits tightly with the nozzle of the air outlet member (3).

7. A fire extinguishing device for electrical equipment according to claim 6, characterized in that: The nozzle adopts a Venturi tube structure.

8. A fire extinguishing device for electrical equipment according to claim 7, characterized in that: A sand and gravel box (13) is provided at the bottom of the box body (1).

9. A fire extinguishing device for electrical equipment according to claim 8, characterized in that: A rotating roller (43) is rotatably connected to the bottom wall of the box body (1), and a folded cloth (42) is wound on the rotating roller (43). A symmetrically distributed torsion spring (44) is connected between the rotating roller (43) and the box body (1), and the torsion springs (44) are all wound on the rotating roller (43). The movable end of the rotating roller (43) is fixedly connected to a third sliding frame (41). The air outlet member (3) on the side close to the box door (14) is fixedly connected to a locking member (4). Each locking member (4) is provided with an arc-shaped slot. The third sliding frame (41) is provided with a convex column on the side close to the locking member (4). The locking member (4) is mechanically locked by cooperating with the convex column through the arc-shaped slot.

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