56results about How to "Reduce the probability of fire" patented technology

The invention discloses a safety monitoring and controlling method for li-ion power battery thermorunaway and a device thereof. When a li-ion power battery suffers from thermorunaway, a composite medium with cooling and fire-extinguishing effects is used as a safety monitoring and controlling medium to enter a power battery box or battery tank in an injection mode. The safety monitoring and controlling medium is composed of chemical substances which are formed by C, F, H and O elements and have cooling and fire-extinguishing effects. A li-ion battery safety monitoring and controlling device based on the above safety monitoring and controlling method comprises a shell and a safety monitoring and controlling medium filling port, a pressure meter connector, a nozzle and a safety valve pressure relief opening which are arranged on the shell. The safety monitoring and controlling device can effectively prevent or reduce the li-ion battery thermorunaway risk, reduce fire probability of the li-ion battery box (tank), control and extinguish initial fire, and has functions of starting operation for many times and extinguishing re-ignited fire of the power battery box.

The embodiment of the invention discloses an early warning method, an early warning system and an air conditioner. Indoor standard environment information values of all collection moments are predefined, indoor environment information of all the collection moments is obtained when early warning is performed, whether the indoor environment information at the first moment meets a preset condition or not is judged according to the predefined first standard environment information at the first moment, and indoor electricity is turned off and early warning is performed when the indoor environment information at the first moment does not meet the preset condition. According to the early warning method, it shows that the indoor environment is abnormal when the indoor environment information at the first moment does not meet the preset condition, the indoor electricity is turned off at this moment, it is prevented that indoor electric appliances are in a work state to cause further deterioration of the abnormal indoor environment, early warning information is generated to perform early warning when the indoor environment is abnormal, and therefore a user can be reminded in time to take steps and the occurring probability of indoor fires is reduced.

The invention discloses an automatic fire extinguishing system for a vehicle and a fire extinguishing method thereof. The system comprises a fire extinguishing processing layer, a data transmission layer, a data analysis processing layer and a user service layer, wherein the fire extinguishing processing layer comprises a detection device, a fire extinguishing device and a fire extinguishing controller; the detection device is used for detecting the real-time temperature of a compartment; an engine compartment and a battery compartment of the vehicle and is also used for detecting whether flames are generated in the compartment; the engine compartment and the battery compartment; the fire extinguishing device comprises fire extinguishing disposal devices arranged in the compartment; the engine compartment and the battery compartment respectively; each fire extinguishing disposal device is used for releasing a fire extinguishing agent to extinguish a fire in an area where the fire extinguishing disposal device is positioned; and the fire extinguishing controller is used for driving the corresponding fire extinguishing disposal device to release the fire extinguishing agent. The automatic fire extinguishing system for the vehicle and the fire extinguishing method thereof achieve the functions of automatic fire extinguishing and remote manual fire extinguishing of the vehicle, arebeneficial to platform information management of fire fighting data, and can also transmit environmental parameters to a cloud platform so as to monitor operating data of the vehicle before a fire occurs and generate a certain prediction effect.

The invention provides a fire warning system and method for an underground power distribution network. The system comprises an equipment temperature sensing module, a cable fire detection module, a video fire identification module, and an upper computer. The equipment temperature sensing module is used for measuring the temperature of underground power distribution equipment. The cable fire detection module is used for carrying out fire detection on an underground power distribution cable. The video fire identification module is used for monitoring an area where a fire is likely to happen in an underground power distribution network in real time and extracting video information of a key area for intelligent identification and analysis. The upper computer is in communication connection withthe three modules, and is used for receiving information collected by the three modules for integrated analysis and sending an emergency disposal decision. Double fire detection of the power distribution equipment and the power distribution cable is realized. The key data of the key area is collected and analyzed through real-time video collection, and warning information is sent in time. Therefore, the fire warning capability of the underground power distribution network is greatly improved, and the probability of fire is reduced.

The invention discloses a forest fire prevention intelligent monitoring system and method based on big data, and belongs to the technical field of forest fire prevention. The invention provides a forest fire prevention intelligent monitoring system based on big data. The system comprises a data acquisition module, a big database, a data analysis module, a data storage module, a data processing module, a feedback module, a regulation and control module, an early warning module and an alarm module. Meanwhile, the invention provides the forest fire prevention intelligent monitoring method based on the big data, wherein the method comprises the following steps: S1, collecting monitoring data of fire factors, and carrying out transmission; S2, establishing an influence function of the fire factors in a forest environment in a safe state on a fire disaster and an association function among the factors; S3, substituting the acquired data, and outputting a result; S4, adjusting the function model to adapt to the current forest environment; and S5, carrying out early warning or alarm operation. According to the invention, the fire condition is monitored, the fire frequency is reduced from the source, and the fire disaster is more effectively prevented.

The invention relates to a box-type substation fire safety system which comprises a monitoring device for monitoring a plurality of box-type substations in a centralized manner, and cooling devices and fire extinguishing devices arranged in the box-type substations, and the monitoring device is in communication connection with the multiple box-type substations; and an acquisition device for acquiring operation state parameters of transformation equipment is arranged in each box-type substation, the acquisition devices are in communication connection with the monitoring device, a plurality of independent chambers are arranged in all the box-type substations, and an infrared three-waveband image data detection alarm, a temperature supervision alarm and a nozzle are arranged in each independent chamber. Each cooling device is a liquid nitrogen cooling device, each fire extinguishing device is a dry powder fire extinguishing device, and the fire extinguishing devices and the cooling devices are connected with the nozzles through conveying pipelines. According to the box-type substation fire safety system, the cooling devices are arranged, so that the probability of fire disasters can be reduced, the fire extinguishing efficiency can be improved, and losses caused by fire breakout of substation equipment can be reduced.

The invention relates to an anti-drop wear-resisting novel thin film paper tube. The anti-drop wear-resisting novel thin film paper tube comprises a cylindrical body of which the two ends are non-closed; anti-drop components are arranged at the two ends of the body; each anti-drop component comprises an annular frame and at least two baffle plates; a wear-resisting coating is formed at the inner side of the body and extends from an end portion of the body in the length direction of the body. During height printing, a thin film is effectively prevented from unreeling from the paper tube, the phenomenon that a paper film is adsorbed on the thin film due to electrostatic friction is effectively avoided, and the production quality is improved.

The invention discloses a mechanical overload protection device. The mechanical overload protection device comprises a power disc of a round structure and an overload protection disc, wherein the power disc is provided with a structure piece in power connection with the outside, one side surface of the power disc is provided with a round containing cavity, and the inner wall of the containing cavity is in a continuous closed sinusoid shape; the overload protection disc is used for being connected with the power disc and provided with an arc avoiding groove, and an elastic overload deformationpart is formed between the outer arc surface of the arc avoiding groove and the outer periphery of the overload protection disc; flanges are uniformly distributed in the middle of the outer peripheralwall of the elastic overload deformation part and are consistent with wave troughs of the sinusoid of the inner wall of the containing cavity in shape; one side of the overload protection disc is provided with a power output component; and the overload protection disc is put in the containing cavity of the power disc, and the flanges are located in the wave troughs of the inner wall of the containing cavity. The invention further discloses a speed reduction mechanism and an electrically-driven flip driver. The mechanical overload protection device, the speed reduction mechanism and the electrically-driven flip driver have the characteristics of being small in size, low in weight, high in bearing capacity, long in service life, stable in operation, low in noise and safe in performance, andthe product using safety is greatly improved.

The invention discloses a composite cable. The composite cable comprises a sheath and a cable core, wherein the cable core comprises a conductor, the surface of the conductor is coated with a graphenelayer, the periphery of the conductor is coated with a shielding layer, the surface of the shielding layer is provided with a woven mesh layer, and the surface of the woven mesh layer is provided with an insulating layer; filling materials are filled between the inner wall of the shielding layer and the surface of the graphene layer, and the surface of the cable core is wrapped with a shielding protection net. According to the composite cable and the preparation process thereof, through the arrangement of the graphene layer, the strength of the cable can be greatly enhanced, the service lifeof the cable is prolonged, the signal stability of the cable is maintained, unnecessary loss is avoided, the fireproof performance is relatively high, and if the internal temperature of the cable is too high, the probability of fire disasters is reduced; and torsion resistance of the cable is relatively high, so when the cable is twisted, the internal cable core cannot be broken, and normal communication can be maintained.

The invention discloses a high temperature and humidity self control energy saving device for a setting machine and a processing method thereof. The device disclosed by the invention comprises a PLC control module, wherein the PLC control module is respectively connected with a textile resistance transducer and a temperature and humidity sensor sequentially through an amplification circuit and ananalog-digital converter, and the PLC control module is further respectively connected with an exhaust fan speed regulation device and a power module. The method disclosed by the invention comprises the following steps: A, collecting data; B, uploading data; C, processing data; D, controlling the exhaust fan speed regulation device; E, treating waste gas. The high temperature and humidity self control energy saving device disclosed by the invention has the characteristics of saving energy, reducing production cost, improving safety and reducing environmental pollution.

The invention discloses a design method of power battery pole pieces. The method comprises steps as follows: S1, determining a structure of a battery cell; S2, determining the designed energy density, the capacity and the size of the battery cell; S3, cutting different sizes of pole pieces with different capacities with the adoption of the same energy density and number of layers, conducting thermal runaway triggering tests, and obtaining the maximum capacity and size which allow fire not to break out in all the triggering tests; S4, zoning the battery pole pieces in a battery actually required to be designed, wherein each zone is not larger than the maximum size measured in S3; S5, cutting joints of zones of the battery pole pieces; S6, conducting same joint cutting on all the battery pole cells of one battery cell, and aligning all joints during piece stacking. The design method of the battery cell pole pieces is simple, low in cost and easy to implement, the probability of breaking out of fire of the battery cell can be effectively reduced, and the method can support increase of the energy density and capacity of the battery cell.

The invention discloses a fireproof charging operation and maintenance integrated system and an operation and maintenance method thereof. The system comprises a parking lot, a fire detection mechanism, a transmission device and a remote monitoring control platform. The parking lot is provided with a plurality of parking charging positions and at least one fire insulation processing device, and the plurality of parking charging positions are respectively used for parking a plurality of electric vehicles. The transmission device is used for sending fire information. And the remote monitoring control platform is used for receiving and displaying the fire information and transmitting the fire information to a fire emergency center. The remote monitoring control platform is further used for judging the parking charging position where a fire-happening electric vehicle is parked according to the fire information when the fire detection mechanism detects that at least one electric vehicle is in fire, and then driving a moving vehicle to move to the front side or the rear side of the parking charging position where the fire-happening electric vehicle is parked. And finally, two fire insulation roller shutters are driven to be pushed out so as to isolate the electric automobile in the fire disaster. According to the invention, the fire is prevented from further spreading, and vehicles around the fire vehicle are protected.

The invention relates to the technical field of tank truck rollover prevention, in particular to a tank truck rollover composite protection system based on supplementary restraint systems. The tank truck rollover composite protection system based on the supplementary restraint systems comprises a tank body, the two supplementary restraint systems, an intelligent washboard, a hydraulic horizontal shift system, a collision detection sensor, a controller and a frame. The tank body is used for bearing transported liquid, the frame is connected with a chassis of a tank truck, the tank body is arranged on the frame, the two supplementary restraint systems are separately and symmetrically arranged on the two sides of the tank body, the hydraulic horizontal shift system is arranged between the tank body and the frame, and the collision detection sensor and the controller are arranged on the tank body. The rollover condition of the tank body is detected through the collision detection sensor, rollover detection signals are received through the controller, the supplementary restraint systems and the hydraulic horizontal shift system are controlled by the controller, and the intelligent washboard is arranged in the tank body. According to the tank truck rollover composite protection system based on the supplementary restraint systems, the probability of occurrence of the rollover accidentcan be reduced, and secondary damage caused by the accident is furthest reduced after rollover.

The invention discloses an anti-explosion and anti-impact bumper system of a remote-control rail flat car. The system comprises a bumper, a damping spring, a bracket, a piston and an air chamber, wherein a guide rail wheel is arranged on the bumper; a check valve is arranged on the air chamber; one end of the damping spring is connected with the bumper and the other end is connected with the bracket; and the piston is positioned in the air chamber and is connected with the bracket through a piston rod. The anti-explosion and anti-impact rear bumper system is simple in structure, is convenient to operate simply and can effectively reduce the probability of explosion or fire caused by damage of electric appliance equipment in a combustible and explosive environment or leakage of vehicle-carried dangerous goods.

The invention discloses a fireproof method and a fireproof controller for an electric vehicle charging pile. The charging pile comprises a fireproof base, a shell, a charging main body mechanism, a heat insulation mechanism and a heat dissipation mechanism, wherein the heat insulation mechanism comprises a fireproof box and a roller shutter motor, and a fireproof roller shutter, and the heat dissipation mechanism comprises a plurality of fans. The method comprises the following steps that whether a fire occurs outside the shell or not is detected; the real-time temperature of the shell is detected; When it is detected that a fire occurs outside the shell, the roller shutter motor is driven to rotate so as to enable the fireproof roller shutter to extend out to surround the charging main body mechanism; when it is detected that no fire occurs outside the shell, the roller shutter motor is driven to rotate so that the fireproof roller shutter can contract, and whether the real-time temperature exceeds a first preset temperature or not is judged; and when the real-time temperature exceeds the first preset temperature, the multiple fans are driven to rotate until the real-time temperature is lower than the first preset temperature. The method can prevent the charging main body mechanism from being burnt by external fire and prevent the fire from further spreading, so that the fireproof performance of the charging pile is improved, the use safety is improved, and the service life is prolonged.

The invention discloses a liftable weak current box and a weak current well. The weak current well and the weak current box body located in the weak current well are included. Slide blocks protrudingout of a surface of the weak current box body are arranged on side surfaces, which are in contact with an inner wall of the weak current well, of the weak current box body. Slideways corresponding topositions of the slide blocks are arranged on the inner wall of the weak current well. A rotating shaft is arranged above a top wall of the weak current well. A pressure-bearing cable is arranged on the rotating shaft, one end of the pressure-bearing cable is fixedly connected with the slide blocks, and the other end is fixedly connected with the rotating shaft and wound on the rotating shaft. Therotating shaft is driven by a motor, a fire extinguishing device capable of being opened through descending of the weak current box body is further arranged at a bottom of the weak current well. A top of the fire extinguishing device is in contact with bottom end surfaces of the slideways. The weak current box body is controlled to ascend and descend through rolling and releasing of the pressure-bearing cable, an outlet of the fire extinguishing device is opened through the weak current box body to achieve a purpose of fire extinguishing, the weak current box is effectively placed in different spaces, and on the basis that a fire behavior of the weak current box is rapidly and timely handled, an influence outside the weak current well is minimized.

The invention relates to the technical field of new energy automobile equipment, and discloses a battery compartment with a buffer device. The battery compartment comprises a battery compartment and a battery pack which are arranged on a vehicle chassis, wherein the lower edge of the battery compartment is fixedly connected with a detachable frame through a shear pin. According to the invention, when the battery compartment with the buffer device encounters large impact, a rotating rod extends out, the forward motion of a battery pack is converted into circular motion parallel to the ground, kinetic energy is consumed under the action of damping and friction, impact force received by the battery pack is reduced, and a good protection effect on the battery pack is achieved, so that the probability that a vehicle is on fire after collision is reduced, and life and property are better protected; and the battery compartment and the battery pack are in large interference fit so as to facilitate positioning and mounting of the battery pack while a clamping bag always provides high pressure, so that it is guaranteed that clamping plates clamp the battery pack, and the battery pack is firmly assembled and shakes are reduced.

The invention discloses a fireproof electric vehicle charging pile and an intelligent fireproof charging station. The charging pile comprises a fireproof base, a shell, a charging main body mechanism, a heat insulation mechanism, a fire early warning mechanism, a heat dissipation mechanism and a controller. The heat insulation mechanism comprises a fireproof box, a roller shutter motor and a fireproof roller shutter; the fire early warning mechanism comprises a temperature sensor and a flame detector; and the heat dissipation mechanism comprises a plurality of fans. The controller drives the roller shutter motor to rotate so as to enable the fireproof roller shutter to stretch out when a fire disaster occurs, drives the roller shutter motor to rotate so as to enable the fireproof roller shutter to contract when the fire disaster does not occur, and judges whether the real-time temperature exceeds the first preset temperature or not. When the real-time temperature exceeds the first preset temperature, the controller drives multiple fans to rotate until the real-time temperature is lower than the first preset temperature. The charging pile can prevent the charging main body mechanism from being burnt by external fire disaster and prevent the fire disaster from further spreading, so that the fireproof performance of the charging pile is improved, the use safety is improved, and the service life is prolonged.

The embodiment of the present invention provides a method and device for detecting the temperature of a solar power generation system. The method for detecting the temperature of the solar power generation system specifically includes: obtaining, by a junction box gateway, the open-circuit voltage of each solar sub component from each sub component junction box; determining the operating temperature of each solar sub component according to the open-circuit voltage; if the operating temperature of any one of the solar sub components in a solar module is greater than a preset value, performing an alarm operation. The method and device can detect the operating temperature of the solar module in the solar power generation system in real time, and achieve high accuracy, thereby reducing a fireprobability of each solar sub component in the solar module and improving the safety of the solar power generation system.

The invention provides an intelligent preassembled transformer substation and a control method therefor, and the transformer substation comprises a main controller which is installed in a preassembledtransformer substation box body, a temperature and humidity controller which is connected with the main controller, an electric heating plate module, a refrigeration module, a fan, an illumination module and a fire extinguishing module, wherein the electric heating plate module, the refrigeration module, the fan, the illumination module and the fire extinguishing module are sequentially connectedwith the temperature and humidity controller. The electric heating plate module, the refrigeration module, the fan, the illumination module and the fire extinguishing module are connected in parallel. The refrigeration module comprises a compressor, an evaporimeter, an expansion valve and a condenser, wherein the compressor, the evaporimeter, the expansion valve and the condenser are connected sequentially. The fire extinguishing module comprises a fire extinguisher and a telescoping mechanism. An upper handle of the fire extinguisher is provided with a groove, and the telescoping mechanism comprises a motor and a telescoping rod. The upper end of the telescoping rod is provided with a zipper, and the zipper is sleeved by the groove of the upper handle. A spraying nozzle of the fire extinguisher faces the electric heating plate module. The transformer substation can reduce the probability of fire happening to the preassembled transformer substation. The transformer substation can employ the fire extinguishing module for automatic fire extinguishing especially during fire, and prevents fire from spreading.

The invention discloses a warehouse fire early warning and alarm system. The warehouse fire early warning and alarm system includes a monitoring terminal and a plurality of warehouse terminals, wherein the monitoring terminal is bidirectionally connected to the plurality of warehouse terminals; the warehouse terminal includes a control module; the input end of the control module is connected witha monitoring module and a power supply module; the output end of the control module is connected with a humidification module, an action module and an alarm module; the action module includes a fixingring at the top end of the inner wall of the warehouse, and the top end of the fixing ring is provided with a plurality of fixing rods; the top end of the each fixing rod is fixed on the inner wall of the top end of the warehouse; the fixing ring is slidably connected with a movable frame, and the top end of the movable frame is provided with an opening; a driving motor is arranged on the side wall of the top end of the movable frame through a screw; and an output shaft of the driving motor is connected with a gear that is rotatably connected inside the movable frame. The warehouse fire earlywarning and alarm system can provide early warning and alarm for the warehouse fire, and can humidify the warehouse environment when the air in the warehouse is relatively dry, so as to reduce the probability of occurrence of fire.

The invention discloses a titanium material separator for the chemical industry, and specifically belongs to the field of chemical equipment. The titanium material separator comprises a tank body; a material pipe and a liquid inlet pipe are arranged on one side of the tank body; a standby pipe and an oil outlet pipe are arranged on the other side of the tank body; a liquid discharging pipe is arranged at the bottom end of the tank body; an air outlet pipe is arranged at the top end of the tank body; a mist catcher is arranged on the inner wall of the tank body and corresponds to the air outletpipe in position; a partition plate is arranged in the middle of an inner cavity of the tank body; a blocking plate is arranged between the partition plate and the inner wall of the tank body; a communicating pipe is arranged on one side of the blocking plate; separation liquid is arranged at the bottom of the partition plate; and an oil material layer is arranged at the top of the separation liquid. According to the titanium material separator, an anti-corrosion inner layer, the partition plate, and the blocking plate which are in direct contact with a medium are made of a metal titanium material, and a main body layer which is not in direct contact with the medium is cast by adopting 316Ti stainless steel, so that strong corrosion can be resisted, the service life of the separator is guaranteed, and normal use by users is guaranteed.

The invention relates to the technical field of electric power and discloses an automatic heat dissipation and fire extinguishing device for an outdoor transformer box. The device comprises a box body, first rotating shafts are movably connected to the interior of the box body, first connecting rods are fixedly connected to the exteriors of the first rotating shafts correspondingly, first gears are fixedly connected to the inner side of the box body, and second gears are engaged to the exteriors of the first gears correspondingly. A second connecting rod is movably connected to the exterior of each second gear. Third connecting rods are movably connected to the ends, away from the corresponding second gears, of the second connecting rods correspondingly. Shells are fixedly connected to the exteriors of the third connecting rods correspondingly. A driving shaft is movably connected into each shell. Through the interaction among ratchet wheels, bimetallic strips, conductors, coils, clamping rods, second rotating shafts, third gears, fourth gears, dry powder chambers and switch assemblies, fire on an electric appliance element or a wiring position in the box body can be extinguished in time, so that electric appliances and the like in the box body are prevented from being seriously damaged by fire combustion; and influences of faults of the transformer box on the life of residents and enterprise production are reduced.

The invention discloses a compressor. The compressor comprises a compressor body including an electrode connected to a lead, an electrode cover arranged on the compressor body to limit a sealed space with the compressor body; a sealing structure arranged between the electrode cover and the compressor body to prevent outside air from entering the sealed space, wherein the electrode is located in the sealed space. According to the compressor provided by the invention, the outside air can be effectively prevented from entering the sealed space by arranging the sealing structure between the electrode cover and the compressor body, and the electrode of the compressor is isolated from the outside air; when an electric arc is generated, open fire generated in the sealed space can be effectively prevented, so that the probability of resulting in a fire is reduced, the safety factor of the compressor is improved, and the quality of products is promoted.

The invention discloses automatic cleaning equipment for an oil smoke pipeline. The automatic cleaning equipment comprises a main body, an upper cleaning part, a lower cleaning part and a side cleaning part. The equipment is placed in the oil smoke pipeline, a threaded rod moves outwards, then an upper wheel abuts against the upper end surface of the oil smoke pipeline, and the upper wheel and a lower wheel rotate to drive the equipment to move; oil dirt on the upper wall of the pipeline is cleaned through the upper cleaning part, oil dirt on the lower wall of the pipeline is cleaned through the lower cleaning part, oil dirt on the side wall of the pipeline is cleaned through the side cleaning part, the equipment can adapt to oil smoke pipelines different in width and height, people can clean the oil smoke pipelines more conveniently, the manpower is saved, the efficiency is improved, meanwhile, the cost of cleaning the oil smoke pipelines and the probability of fire disasters are reduced, and automatic cleaning of the oil smoke pipelines is completed.

The invention discloses an emergency protection device for a high-voltage circuit. The device comprises a protector shell. Transmission cavities are formed in the protector shell in a bilateral symmetry mode. Supporting columns are fixedly arranged on the lower wall of the conveying cavity in a bilateral symmetry mode. An iron core is fixedly arranged at the upper end of the supporting column. A high-voltage wire is wound on the iron core. The lower end of the high-voltage line is electrically connected with a controller shell. The device is simple in structure, maintenance convenience, the temperature detection device is simple in structure and convenient to use. The temperature inside the circuit can be detected through the built-in temperature detection device. When the circuit breaks down due to overload or short circuit, the temperature can be changed rapidly, then the probability that the circuit is on fire is reduced through the trigger device and protection measures are started, the circuit is protected rapidly, and major safety accidents are prevented from happening.

The invention discloses a method of improving tank material finishing temperature. A five-rack tandem cold rolling mill is lubricated by water-based coolant. Volume percentage of oil phase of the water-based coolant is from 2% to 20%. Jet flow of the water-based coolant is 500 liters per minute to 1500 liters per minute. Reduction rate of a first rack is from 20% to 35%. The reduction rate of a second rack is from 20% to 35%. The reduction rate of a third rack is from 35% to 50%. The reduction rate of a fourth rack is from 35% to 50%. The reduction rate of a fifth rack is from 35% to 50%. The five-rack tandem cold rolling mill is lubricated by the water-based coolant, the finishing temperature of finished products reaches to at least 150 DEG C through controlling of content of the oil phase and jet flow of the water-based coolant and reduction rate allocation, the products can directly meet requirements of earing ratio and mechanical property without annealing operation, requirements of tank material are met, production efficiency is high and capacity is increased.

The invention provides a grouting device, which comprises a plurality of grouting pipes and gate valves, wherein each gate valve is mounted on each grouting pipe; the grouting parts of the plurality of grouting pipes are uniformly arranged at the upper part of a mined out space at intervals; the gate valves are used for controlling the time-sharing and intermittent grouting of each grouting pipe. According to the device, the grouting area for an oxidation zone in the mined out space is effectively increased, the compaction of the mined out space is increased, the probability of fire hazards caused by air leakage of the mined out space is effectively reduced.

The invention discloses an underground pedestrian passageway based on an inner-outer-ring structure. The underground pedestrian passageway consists of a variable-speed passageway, a constant-speed passageway and a load bearing structure; the constant-speed passageway is circumferentially arranged at the outer side of the load bearing structure; the variable-speed passageway is circumferentially arranged at the outer side of the constant-speed passageway, so that a co-rotating transmission inner-outer-ring structure is formed; the variable-speed passageway consists of three automatic pedestrian passageways of different speeds and a safety walking passageway; the constant-speed passageway consists of an automatic rapid pedestrian passageway; an isolation guard railing and an emergency guard railing are arranged between the variable-speed passageway and the constant-speed passageway, and the emergency guard railing is provided with an emergency switch; a plurality of axial-flow fans and fire smog detectors are arranged in the passageways. The underground pedestrian passageway is more environment-friendly, high-efficient and convenient, so that the short-distance traffic jam problem can be relieved by utilizing the least land resource and the lowest economic cost, the middle-short-distance traveling time is shortened, and the traveling efficiency is improved.