129results about How to "Avoid explosion" patented technology

The invention discloses a remote sensing image segmentation method based on multi-scale wavelet transform and Mama. The method comprises the following four steps: firstly, carrying out preprocessing and division on an ISPRS Potsdam data set and a Vaihingen data set; then constructing a segmentation network, wherein the network comprises a local detail extraction branch, a spatial semantic extraction branch, a cross-branch feature fusion part and a decoder; training and optimizing the network by using the training set; and finally, performing segmentation reasoning on a test image by using the trained model. According to the method, the high-frequency detail extraction capability of the image is enhanced through multi-scale wavelet transform, the long-distance dependency relationship is modeled by using the visual state space block, and effective fusion of the features is realized through the double-branch fusion module, so that the feature extraction capability and the semantic segmentation precision are improved, and meanwhile, the training efficiency and the stability are optimized.

This invention discloses a plug-in board and adapter, associated electrical components, and an electric vehicle. The plug-in board includes an MCU circuit I, an adapter communication circuit, and a controller circuit. Some models also include a BMS battery management circuit, a vehicle electrical and electronic fuse circuit, a taillight control circuit, a communication line starting power supply circuit, a human-machine interaction circuit, and a battery communication circuit. The plug-in board is soldered to the controller's PCB circuit board via pins, or connected to the pins on the controller's PCB board via a socket. The plug-in board and the controller are housed in a single housing, saving space, material costs, and labor costs. The original controller's MCU chip can be improved to enhance controller performance and enable the application of bus control systems without modification, greatly simplifying the wiring harness and connectors throughout the vehicle.

The utility model discloses an ammonium nitrate solution concentration blending reation kettle with anti -explosion function belongs to reation kettle equipment technical field, the utility model discloses a reation kettle body is communicated with the discharge valve at reation kettle body bottom, can carry out even heating to solution through the electric heating plate in the reation kettle body inner wall bottom groove, avoid local temperature too high and cause ammonium nitrate to decompose gas and cause explosion, the cooperation design of stirring rod and top motor can carry out sufficient stirring to ammonium nitrate solution in reation kettle, make solution concentration distribution even. The annular ring and the explosion -proof pipe fixedly connected with the annular ring that reation kettle body surface sets up up and down, effectively enhanced the overall structural strength of reation kettle, the gas outlet pipe of top annular ring and the gas inlet pipe of bottom annular ring mutually cooperate, and the outside cold gas enters the space between the explosion -proof pipe and reation kettle body, and then even cooling is carried out to reation kettle body, and then gas is discharged to the outside from the gas outlet pipe, and the device has the advantages that the explosion -proof effect is good.

The utility model relates to the technical field of gas preparation, and discloses a gas standard substance preparation device which comprises a gas distribution main pipeline and a connecting pipe, a quick release assembly is arranged on the connecting pipe, a safety assembly is arranged on the gas distribution main pipeline, the quick release assembly comprises a mounting block, and an insertion block is movably connected in the mounting block. According to the gas standard substance preparation device, firstly, two pull rods on a mounting block are pulled outwards to the farthest end, a clamping block is straightened to the farthest end along with a sliding block, a spring is compressed, then an insertion block at the top of a gas storage bottle is inserted into a cavity in the mounting block till the top of a connecting base is attached to the bottom of the mounting block, the pull rods are loosened, and under the elastic force action of the spring, the gas storage bottle is fixed to the mounting block. When the gas storage cylinder needs to be disassembled, the pull rod is pulled outwards, the fixing effect of the clamping block on the inserting block is relieved, then the gas storage cylinder is pulled out downwards, quick disassembly can be completed, and the advantage that the gas storage cylinder is convenient to disassemble and assemble is achieved.

The utility model discloses a compartment type powder cleaning system with a fixed forming part, which is characterized in that a piston driving device drives a forming piston to lift in a forming cylinder, and a forming cylinder lifting driving device drives the forming cylinder to lift; the upper end of the forming cylinder can be inserted into an opening of a bottom plate of the forming chamber in a sealed mode and is connected with a working plane on the upper side of the bottom plate of the forming chamber in an aligned mode, the powder cleaning cylinder driving device drives the powder cleaning outer cylinder to ascend and descend, and the upper end face of the powder cleaning outer cylinder can make sealed contact with the lower side face of the bottom plate of the forming chamber. The lower portion of the forming cylinder and the lower portion of the powder cleaning outer cylinder can be aligned and connected with the upper end face of a forming piston after 3D printing is completed, a powder containing space with the upper end face of the forming cylinder and the upper end face of the forming piston as the bottom face can be formed in the powder cleaning outer cylinder, and the dust collector can suck away powder in the powder containing space through a powder suction opening in the side wall of the powder cleaning outer cylinder. According to the 3D printing device, the centering precision of the forming cylinder is guaranteed, and intelligent and automatic powder cleaning and piece taking of the 3D printing device are achieved.

The application discloses a leakage dangerous chemical product recovery system and recovery method, which comprises a dangerous chemical product collecting box, a Venturi generator, a suction pipe and a high-pressure inert gas cylinder. The high-pressure inert gas cylinder is connected with one end of the Venturi generator. One side of the dangerous chemical product collecting box is provided with a collecting box inlet. The top of the dangerous chemical product collecting box is provided with a collecting box outlet. The Venturi generator is communicated with the collecting box outlet on the top of the dangerous chemical product collecting box through a pipeline. The suction pipe is communicated with the collecting box inlet on one side of the dangerous chemical product collecting box. The high-pressure inert gas entering the Venturi generator can generate negative pressure to suck the leakage dangerous chemical product into the dangerous chemical product collecting box through the suction pipe. The leakage dangerous product recovery device and recovery method can return the mixed gas of the inert gas and the treated dangerous chemical product tail gas to the suction pipe, so that the gas concentration in the dangerous chemical product collecting box is kept below the lower limit of explosion, and explosion in the dangerous chemical product collecting box is prevented.

The present application relates to lens detection technical field, especially to a kind of lens heating defrosting demisting effect test device.The present application provides a kind of lens heating defrosting demisting effect test device, which can adjust the height of lens, and easy to operate.A kind of lens heating defrosting demisting effect test device, including heating base;Water tank, heating base upper portion is connected with water tank;Guide sleeve, three guide sleeves are uniformly connected with water tank upper portion;First support frame, first support frame is slidably connected in the three guide sleeves, and first support frame lower portion is slidably connected with water tank;Adjusting mechanism, adjusting mechanism is connected between water tank front upper side and first support frame front lower side.The present application places lens on the upper portion of first support frame, and the first support frame drives lens to move up and down to adjust height by driving screw forward and reverse rotation with forward and reverse rotation hand wheel, so as to test the lens with different heat resistance, so that the operation is relatively simple, and lens does not need to be held for detection.

The utility model relates to a kind of integrated industrial air conditioning unit using combustible refrigerant, indoor side air duct and outdoor side air duct are separated in shell using first partition, evaporator and air supply fan are placed in indoor side air duct, condenser and condensing fan are placed in outdoor side air duct, indoor side air duct is communicated with indoor space by air supply port and return air port, outdoor side air duct is communicated with outdoor space by air inlet and air outlet, air supply valve is installed at the air supply port, exhaust valve for selectively communicating with outdoor side air duct is installed on indoor side air duct, refrigerant detection device for detecting the content of combustible refrigerant is installed in shell, the refrigerant detection device is connected with controller, the controller is configured to control the air supply valve to close and exhaust valve to open in response to refrigerant leakage information.The utility model can handle combustible refrigerant leakage in time, ensure air conditioning unit use safety.

The application discloses a kind of live detection devices of pole-mounted transformer internal insulation defects, including acquisition terminal, telescopic insulating rod, intelligent analysis terminal;The first side of acquisition terminal is provided with acoustic sensor and is used to adsorb to the surface of pole-mounted transformer adsorption component, and acoustic sensor is used to collect voiceprint partial discharge signal;The top of insulating rod is provided with connecting component for disassembling acquisition terminal;Intelligent analysis terminal is connected with acquisition terminal, for whether there is insulation defect in pole-mounted transformer according to voiceprint partial discharge signal analysis inside.The above-mentioned live detection device of pole-mounted transformer internal insulation defect can quickly and conveniently contact live detection to pole-mounted transformer, avoid the interface effect of box and air and air absorption attenuation, improve the anti-electromagnetic interference ability, accurately determine the internal insulation fault of transformer, improve detection sensitivity and accuracy, eliminate security risks as soon as possible, avoid transformer explosion.

The application provides a preparation method of 3,7-dinitro-1,3,5,7-tetraazabicyclononane, comprising the following steps: 1) feeding a first material comprising urea and concentrated sulfuric acid and a second material comprising fuming nitric acid and concentrated sulfuric acid into a microchannel reactor to perform a first-stage nitration reaction, to obtain a first-stage nitration reaction liquid; 2) feeding the first-stage nitration reaction liquid into a first tubular reactor to perform a second-stage nitration reaction, to obtain a second-stage nitration reaction liquid; 3) feeding the second-stage nitration reaction liquid and water into a second tubular reactor to perform a hydrolysis reaction, to obtain a hydrolysis liquid; 4) feeding the hydrolysis liquid and a third material comprising polyoxymethylene and ammonia water into a third tubular reactor to perform a condensation cyclization reaction, to obtain 3,7-dinitro-1,3,5,7-tetraazabicyclononane. The preparation method has the advantages of high safety, less waste pollution and simple operation.

The present application relates to the technical field of data query, in particular to a multi-index horizontal expansion data processing method and system, comprising the following steps: collecting time series and dimension attributes to generate a business detail wide table, matching non-empty measure fields to form independent index logic, combining rule nodes to build a general materialized architecture, and outputting multi-index processing results through scheduling mapping and window aggregation. In the present application, a wide table is constructed in the model layer and atomic and derived indexes are centrally managed, realizing a unified index definition method independent of dimension combination. When a user queries, dimension parameters are dynamically combined by the query engine to automatically build an aggregation statement and calculate the result, avoiding the problem of derived index explosion caused by the expansion of the number of dimensions. Meanwhile, multi-index joint analysis is completed in the same materialized table without the need for multiple table joins, improving query execution efficiency, having high adaptability to index updates and dimension changes, and significantly reducing data development and operation and maintenance burden.

The tumor immunotherapy efficacy image dynamic evaluation and early warning system and method relate to the technical field of medical image processing and auxiliary diagnosis. Based on baseline and follow-up medical image data, a physical time sequence is constructed. Metabolic characteristic parameters are obtained by using the image attribute difference between the target monitoring area and the reference area, and an equivalent biological evolution time sequence is generated. The image is spatially aligned and high-dimensional feature vectors are extracted, first and second order evolution gradients are calculated, efficacy early warning results are output, and mapping weight coefficients are updated by feedback optimization parameters. Based on the nonlinear time mapping mechanism of baseline metabolic characteristic parameters, the physical time sequence is converted into the equivalent biological evolution time sequence, which can fundamentally eliminate the time sequence gradient distortion caused by irregular follow-up intervals and individual metabolic heterogeneity.

This utility model discloses a lithium battery module with an explosion-proof protection structure, including a main body component. The main body component includes a base, connecting rods connected to both ends of the base, a protective shell fixed to the base, and a battery fixedly placed inside the protective shell. A fire extinguishing component includes a base plate threaded to the top of the battery, an L-shaped plate fixed to the base plate, a spring horizontally fixed to the L-shaped plate, a rolling gear connected to the spring, a large gear engaged with the rolling gear, a ball valve fixed to the large gear by a long rod, a fixed shell sleeved outside the ball valve, and a sandbox connected above the fixed shell. A cooling component includes a circulation pipe connected to the connecting rods. This utility model, through its fire extinguishing component, releases a special agent to isolate air and prevent combustion when the lithium battery module begins to burn due to excessive temperature, thus delaying the explosion, buying more time for rescue, and preventing greater economic losses.

The present invention relates to a method of recycling a positive electrode active material and a recycled positive electrode active material prepared by the same. More particularly, the present invention relates to a method of recycling a positive electrode active material, the method including step A of fragmenting a waste battery including a positive electrode, a separator, and a negative electrode; step B of removing the negative electrode by jetting compressed air onto waste battery scraps; and step C of treating the waste battery scraps from which the negative electrode has been removed with a solvent to remove the separator and obtain positive electrode scraps and a recycled positive electrode active material prepared by the method. According to the present invention, the present invention has an effect of providing a method of recycling a positive electrode active material, the method being capable of greatly improving the rate performance of a battery using a recycled positive electrode active material by removing ceramic transferred from a separator when separating a positive electrode from a waste battery; being capable of achieving eco-friendliness by not using acids, and thus reducing process costs by eliminating the need for neutralization and wastewater treatment processes; being capable of preventing loss of metal elements by recycling a positive electrode active material in an intact state without decomposing the positive electrode active material; being capable of recovering a current collector without dissolving the current collector with an organic solvent; being capable of preventing generation of toxic gases or explosion; and being suitable for mass production by using an easy-to-manage process such as heat treatment or compressed air jet and a recycled positive electrode active material having excellent electrochemical performance, resistance properties, and capacity properties prepared by the method.

The utility model discloses a transformer explosion -proof pressure release valve subassembly, the valve core device includes the fixed assembly of setting in the pressure release valve body, the pressure release valve body is provided with the valve core subassembly for up and down movement, and valve core subassembly penetrates fixed assembly, the bottom fixed mounting of valve core subassembly is used for the pressure -relief explosion -proof pressure -relief subassembly, thereby, when the transformer short circuit occurs, when the pressure of pressure release valve body exceeds the safe value, the burst membrane breaks along the prefabricated notch, forms the large -flow pressure -relief passage, prevents the explosion of transformer, and the bottom of membrane disc adds silica gel damping pad simultaneously, resets automatically through the deformation memory characteristic after pressure relief, avoids the failure of traditional spring because of fatigue, can prevent the explosion of transformer, and the three -stage pressure -relief mechanism of pressure release valve body makes the explosion -proof pressure of oil tank promotion, reaches the explosion -proof state of pressure release valve body.

The utility model discloses an environmental protection waste plastic bottle early stage processing lateral wall grooving device belongs to plastic bottle processing equipment technical field, including control machine case, the control machine case upper surface is equipped with the connecting plate to the inside horizontally, the connecting plate surface is embedded and is installed with hydraulic cylinder, the hydraulic cylinder piston rod lower extreme is connected with the lifting plate, the lifting plate bottom surface is densely distributed with a plurality of grooving cutters, the lifting plate upper surface four all through telescopic guide rod and connecting plate lower surface connection at the corner position department, the lifting plate below is equipped with the bearing frame body, the bearing frame body below four all downward and be equipped with the support leg at the corner position department, this lateral wall grooving device can even lay flat operation to the pouring of the laminated several plastic bottles, then carries out disposable lateral wall grooving, can collect the waste material simultaneously, environmental protection, can reduce the risk of explosion accident of the plastic bottle that the bottle mouth cover is not taken off or the bottle mouth is jammed after extruding because of the bottle mouth.

The present invention provides a battery pack, the structure of the battery pack, and a method for manufacturing the same. The battery pack includes: a battery module; a battery pack housing defining an internal space for accommodating the battery module; a first valve disposed in the battery pack housing to selectively connect the interior and exterior of the battery pack housing; and a support member supporting the battery pack housing from the interior. The battery pack housing is sealed such that when the first valve is closed, gas is prevented from entering and leaving the battery pack housing.

This utility model relates to the field of airbag technology and provides a special tooling for the detonation of pedestrian protection airbags. The airbag housing is assembled onto a housing mounting platform using bolts, facilitating assembly and disassembly. An inclined windshield profile plate is provided on the side of the housing mounting platform to simulate a car windshield. This windshield profile plate is detachable, allowing for windshield replacement as needed. On the other side of the housing mounting platform, a movable hood opening mechanism is provided via a hinge mechanism to simulate a car engine hood. The hood opening mechanism can be adjusted to simulate different opening angles of the engine hood. Transport wheels allow the entire tooling to be moved freely. The entire tooling can quickly adapt to pedestrian protection airbags of different shapes, sizes, and installation points.

This utility model discloses an explosion-proof junction box housing, specifically relating to the field of electrical equipment technology. It includes a junction box with a hinged door at the front. Bolts are threaded inside the door and connected to the front thread of the junction box. A first sealing strip is fixedly connected to the top of the door, and a second sealing strip is installed at the top of the first sealing strip. The second sealing strip is fixedly connected to the junction box. A sealing assembly is installed inside the junction box, and an explosion-proof mechanism is installed on the outside. This utility model, by setting up the sealing assembly and the explosion-proof mechanism, can form two independent sealing barriers, effectively preventing external gases, liquids, or dust from entering the junction box and causing an explosion. Simultaneously, it can disperse stress and absorb energy, reducing the risk of the junction box housing cracking.

The utility model discloses an explosion-proof housing for fixedly installing a pump suction type phenol gas detector, which comprises an installing seat, the installing seat is provided with an explosion-proof housing, the explosion-proof housing is internally provided with a pump suction type detector, the explosion-proof housing is provided with a plurality of chambers, the chambers are internally provided with air bags, the air bags are internally provided with carbon dioxide solution, and the carbon dioxide solution is filled with a carbon dioxide solution. A movable plate is arranged on the side, facing the pumping type detector, of the air bag, the movable plate is connected to the inner wall of the anti-explosion shell through a movable assembly, and a blasting assembly is arranged on the side, facing the air bag, of the movable plate. When the pump suction type phenol gas detector breaks down and internal phenol gas is burnt, the detector and the phenol gas which are burnt can be extinguished in time, so that the possibility that the detector further explodes can be avoided, a series of reactions are isolated in the explosion-proof shell, and the service life of the explosion-proof shell is prolonged. The surrounding working environment and working personnel can be protected, and the safety and the explosion-proof effect are greatly improved.

This utility model discloses an industrial waste gas leak prevention device, including a smoke collection duct, the internal space of which is a smoke collection chamber. The upper wall of the smoke collection duct is connected to a pressurized exhaust duct. The upper wall of the smoke collection duct is an ejector mounting wall. Several water film ejectors are installed in a circumferential array on the lower side of the ejector mounting wall. Each water film ejector can spray a cone-shaped water film jet downwards. The several cone-shaped water film jets distributed in a circumferential array are spliced ​​together to form a water film isolation wall, which divides the smoke collection chamber into upper and lower parts. The water film isolation wall formed by the several cone-shaped water film jets distributed in a circumferential array can effectively prevent harmful gas fumes from being directly discharged from the smoke collection duct and absorb the harmful gas fumes. The high-efficiency telescopic device drives the impact plate to form a gas fumes channel at the center of the water film isolation wall, so that the absorbed gas fumes can be discharged from the smoke collection duct in time, thereby avoiding excessive pressure in the smoke collection duct and reaction chamber, which may lead to an explosion.

The utility model relates to battery technical field, concretely is a kind of rechargeable lithium battery function circuit, is composed of lithium battery charging part, lithium battery protection part, voltage stabilizing output part, electric quantity display part and lithium ion battery. In the charging process, electric energy enters through interface, first pass through TP4056 chip voltage reduction current limiting, then pass through WST8205A chip detection, control DW01 chip to lithium ion battery is charged. In the use process, on one hand, the electric energy in lithium ion battery first pass through WST8205A chip detection, control DW01 chip to AMS1117 chip discharges, AMS1117 chip will electric energy voltage reduction and output, according to the model of AMS1117 chip different can output different voltage to be compatible with electrical equipment. On the other hand, the residual electric quantity in lithium ion battery is detected in real time by HM1160 chip and is displayed. It is used to replace the use of nickel-chromium (nickel-hydrogen) battery and dry battery.

This invention relates to the field of fire-fighting equipment manufacturing technology and discloses an intelligent fire-fighting window opener capable of preventing hand pinching. It includes a window frame, a mounting base at the lower end of the window frame, a sensing pipe at the lower end of the mounting base, a gas safety mechanism movably installed inside the mounting base, and an automatic fire-closing mechanism at the lower end of the mounting base. By incorporating the automatic fire-closing mechanism, when a fire breaks out indoors due to excessively high gas concentration, the interaction between the heat-conducting block and the movable slider causes a push-button switch to be pressed and activated. Once activated, the push-button switch causes the drive gear to rotate in the opposite direction, closing the window and automatically retracting the methane detection block during the window closing process. This prevents outside air from entering the room and further intensifying the fire, and also avoids the methane detection block from overheating and exploding.

The utility model discloses a kind of incineration flue gas dust removal mechanism, it is related to flue gas dust removal technical field, including wall, fixed frame is installed in wall interior, the central position of fixed frame bottom is fixed with driving motor by bolt, driving motor outside is equipped with dust cleaning mechanism;Dust cleaning mechanism includes electric telescopic rod, fixed frame bottom is connected with outer hanging ring by metal rod, slidingly connected with sliding block in outer hanging ring inner side, conversion switch is installed in outer hanging ring interior, electric telescopic rod outside is fixedly connected with fixed block, electric telescopic rod lower end is welded with dust cleaning hanging plate, two-way rotation cleaning can reach the effect of high-speed one-way dust cleaning with smaller rotating speed, can reduce the damage caused by cleaning tool to incinerator chimney inner wall in cleaning process, can play a protective role to incinerator in dust removal process, effectively prolongs the service life of incinerator.

The present application relates to heat exchanger technical field, provide a kind of fin tube-penetrating equipment and its using method.Fin tube-penetrating equipment includes rack;Fin assembly is placed in rack, and multiple tube-penetrating holes are provided on fin assembly, and at least one tube-penetrating hole is penetrated with the pick-up rod suitable for supporting fin assembly;Guide rod assembly is placed in one side of fin assembly along the axial direction of tube-penetrating hole and corresponds with multiple tube-penetrating holes one by one;Heat exchange tube assembly is placed in another side of fin assembly opposite with guide rod assembly along the axial direction of tube-penetrating hole, and heat exchange tube assembly corresponds with multiple tube-penetrating holes one by one;First driving device is installed in rack and is suitable for guiding guide rod assembly to switch from first initial position to first tube-penetrating position, and suitable for guiding guide rod assembly and pick-up rod to switch from first tube-penetrating position to first initial position;Second driving device is installed in rack and is suitable for guiding heat exchange tube assembly to switch from second initial position to second tube-penetrating position.The fin tube-penetrating equipment can prevent fin assembly from exploding or scattering.

The application relates to the technical field of junction boxes, in particular to a remote explosion-proof junction box which is composed of a junction box body and a junction cover fixedly installed on the junction box body. A junction column is arranged in the middle of the junction box body and is used for being connected with an external cable; a plurality of junction barrels are further fixedly arranged on the junction box body, so that cable access is facilitated and the cables are ensured to be orderly arranged. Each junction barrel is provided with a fixing adjusting device which mainly functions to fix the external cable, so as to prevent the cable from being loosened or falling off in the use process. When the cable needs to be accessed, an operator will first pass the cable through the junction barrel, and then connect the end of the cable to the junction column. After ensuring that the cable is firmly connected with the junction column, the operator will further fix the cable in the junction barrel by adjusting the fixing adjusting device, so as to ensure the stability and safety of the cable in the junction box.

This utility model relates to the field of hydrogen energy technology, and in particular to an integrated multi-functional high-pressure hydrogen cylinder valve. It includes a main control solenoid valve, a manual valve, an overflow valve, a venting valve, and a temperature-driven venting device mounted on the valve body. All of these components are located on the side of the valve body. This utility model employs an internal channel layout, integrating multiple modules such as the main control solenoid valve, manual valve, overflow valve, and temperature-driven venting device. This significantly simplifies the pipeline structure, reduces leakage risk, and achieves a revolutionary structure characterized by high-density integration, ultra-thin flatness, and high reliability maintenance.

A dust collection and drainage system for a flour conveying silo includes a spray mechanism mounted on the silo. A filter screen is fixedly installed inside the silo, dividing it into a first compartment and a second compartment. Each compartment is equipped with a scraping mechanism for removing water. Both compartments also have open flame detectors for detecting sparks. A controller is fixedly mounted outside the silo. Drainage pipes, connected to the bottom of each compartment and fitted with valves, are installed at the bottom of the first and second compartments. When the open flame detector detects a spark inside the silo, it converts the detection signal into an electrical signal and transmits it to the controller. The controller then activates the spray mechanism to extinguish the fire and simultaneously reduce flour dust, preventing dust explosions and promptly eliminating safety hazards.

The application relates to the field of outdoor communication cabinets, and discloses a high-strength explosion-proof outdoor communication cabinet which comprises a protection mechanism and an explosion-proof mechanism, the explosion-proof mechanism is fixedly installed in the interior of the protection mechanism, the interior of the explosion-proof mechanism is provided with a transmission part, one side of the transmission part is slidably provided with a second communicating part, the other side of the transmission part is slidably provided with a first communicating part, the top center of the transmission part is fixedly provided with an adjusting part, the interior of the adjusting part is provided with a positioning support, the interior center of the positioning support is fixedly provided with a driving motor, the bottom center of the driving motor is fixedly connected with a threaded rod, the explosion-proof mechanism is installed in the interior of the protection mechanism, the oxygen concentration in the interior of the communication cabinet can be quickly reduced, the communication cabinet can be protected from power-off, and explosion accidents of the communication cabinet can be avoided.

The gas emergency cut-off valve comprises a valve body with a valve cavity, a gas inlet hole and a gas outlet hole which are communicated with the valve cavity are formed in the valve body, a valve rod and a valve element for opening and closing the gas inlet hole are installed in the valve cavity, the bottom end of the valve rod is connected with the valve element, and the lower portion of the valve rod is connected into the valve body through a rotating shaft in a swinging mode. A passive magnet for driving the valve rod to swing to open and close the valve core is fixed at the top end of the valve rod; an electric control shell is installed outside the valve body, a sealed space is formed in the electric control shell, a driving magnet and a driving assembly are arranged in the sealed space, the driving assembly drives the driving magnet to move in a reciprocating mode so that the driven magnet can be attracted to be close to or repelled to be away from each other, and an electronic assembly for controlling the driving assembly is further arranged in the sealed space. According to the device, the electric control structure for controlling opening and closing of a gas circuit is sealed in the electric control shell outside the valve body, and the electric control structure possibly generating electric sparks is effectively sealed and isolated in an electricity and gas physical isolation mode, so that the aim of preventing explosion and fire disasters is fulfilled.