274 results about "Gaseous fire suppression" patented technology

A relatively low pressure inert gas hazard suppression system (20) is provided which is designed to protect a room (22) or the like from the effects of fire or other hazard. The system (20) includes a plurality of pressurized inert gas cylinders (24) each equipped with a valve unit (26); each valve unit (26) is in turn coupled via a conduit (28) to a delivery manifold (30). The respective valve units (26) are operable to deliver gas from the cylinders (24) at a generally constant pressure (usually around 10-100 bar) throughout a substantial portion of the time of gas delivery, to thereby provide effective hazard suppression without the need for expensive high-pressure gas handling and distribution hardware and a reduction in room venting area due to lower room over-pressurization. Each valve unit (26) has a valve body (48) and a shiftable piston-type sealing member (56). Gas pressure from the cylinder (24) and a spring assembly (184) biases the member 56 to the valve open position, this being counterbalanced by gas pressure within equalization and modulation chambers (180, 182) provided in the valve unit (26). When a hazard is detected, the valve units (26) are actuated by draining of gas from the modulation chambers (182), allowing gas flow from the cylinders (24). As gas discharge proceeds, gas flows into and out of the modulation chambers (182) so as to achieve the desired generally constant pressure gas output. Near the end of gas discharge, the spring assembly (184) becomes predominant and holds the valve unit (26) open until all gas is discharged.

The invention relates to a fire extinguishing system for energy storage units of lithium batteries. The fire extinguishing system mainly comprises an automatic fire alarm system, a gas fire extinguishing system, a fire extinguishing linkage control device, a fire emergent broadcasting and fire extinguishing special telephone device. Fire extinguishing devices of the fire extinguishing system can be automatically or manually started, the automatic starting is triggered mainly by a fire alarm control unit, the fire alarm control unit can receive triggering signals input by a battery management system and a detection alarm, when fire alarm conditions are met, starting signals are output to a gas fire extinguishing controller, and a fire extinguishing device is started to spray a fire extinguishing agent to the energy storage units; when an operator finds fire behavior in a protective zone, a start button outside the protective zone or on the gas fire extinguishing controller can be manually pressed down, and the manual operation of the fire extinguishment system is realized. Specific to multiple fire spraying characteristics of the lithium batteries, the two sets of fire extinguishing devices of the fire extinguishing system share one fire extinguishing cabinet, and the fire extinguishment protection of the two energy storage units of the lithium batteries is realized. The two sets of fire extinguishing devices are independent of each other and spare to each other, and the whole fire extinguishing system has a secondary fire extinguishment function.

An automatic fire extinguishing system includes a canister having a central axis, an outlet port disposed on the canister, a dip tube disposed in the canister about the central axis and in partial fluid communication with the canister and coupled to the outlet port, a propellant gas mixture disposed within the canister, a gaseous fire suppression agent disposed in the canister and a dry powder fire suppression agent disposed in the canister.

A method and device for preventing fire and for extinguishing fire in an enclosed space in which a permanent negative pressure is set, includes fresh air being supplied in a regulated manner to the compartment atmosphere as supply air and exhaust air being discharged from the compartment atmosphere in a regulated manner, and wherein should a fire occur or to prevent a fire, an extinguishing agent which is gaseous under normal conditions is supplied to the compartment atmosphere as the supply air. In order to achieve a relieving of pressure without changing the set negative pressure, or upon a sudden flooding of the space with the gaseous extinguishing agent, the total volume flow of fresh air and / or extinguishing agent supplied to the compartment atmosphere as supply air is at all times less than or equal to the volume flow of the exhaust air discharged from the compartment atmosphere.

The present disclosure relates to a fire extinguishing composition generating fire extinguishing substance through high-temperature decomposition; the fire extinguishing composition includes a fire extinguishing material which can be decomposed to release substance with fire extinguishing properties during the heating process; the content of the fire extinguishing material is at least 80 wt %; a pyrotechnic agent is adopted as a heat source and a power source in a process of fire extinguishing; and the purpose of fire extinguishing is achieved by: igniting the pyrotechnic agent, generating a large quantity of fire substance from the fire extinguishing composition in the use of high temperature produced by burning pyrotechnic agent, and the fire substance sprays out together with the pyrotechnic agent. Compared with the traditional aerosol fire extinguishing systems, the gas fire extinguishing systems and the water type extinguishing systems, the present disclosure provides a more efficient and safer fire extinguishing composition.

The invention discloses a building fire protection linkage system. The building fire protection linkage system comprises a control unit; the control unit is connected with a monitoring system through a WiFi wireless gateway; the control unit is connected with a fire protection detection system, an alarm system, a liquid fire extinguishing system, a gas fire extinguishing system and an emergency aid system through a Zigbee wireless communication module; the control unit, the monitoring system, the fire protection detection system, the alarm system, the liquid fire extinguishing system, the gas fire extinguishing system and the emergency aid system are all connected with a standby power source system; the WiFi wireless gateway is connected with a local control terminal; and the WiFi wireless gateway is connected with a cloud server and a mobile control terminal through the Internet. According to the building fire protection linkage system of the invention, fire protection equipment is connected through a wireless network, and therefore, the influence of a fire source on signals can be decreased; linkage equipment can be monitored and managed in a unified manner through a remote mode, and the influence of the false warning of dangerous cases can be decreased; and the building fire protection linkage system can be in linkage with monitoring equipment and emergency facilities, and therefore, the building fire protection linkage system has high functional extendibility.

The invention discloses a fire-fighting device of a container energy storage system. The container energy storage system comprises a plurality of battery clusters, wherein the fire-fighting device comprises a gas fire extinguishing module, a liquid fire extinguishing module, a detection module and a control module; the detection module obtains smoke signals, temperature signals and / or gas signalsof the energy storage system; the liquid fire extinguishing module comprises a plurality of liquid fire extinguishing units corresponding to the battery clusters in a one-to-one manner; the liquid fire extinguishing units are arranged in the corresponding battery clusters; and the control module sequentially controls the gas fire extinguishing module and the liquid fire extinguishing units of theliquid fire extinguishing module to run according to the smoke signals, the temperature signals and / or the gas signals. The invention further discloses a control method of the fire-fighting device of the container energy storage system. By means of the fire-fighting device combining early-stage gas fire extinguishing and later-stage liquid fire extinguishing, the control level of the energy storage system during a fire disaster is improved, losses of the energy storage system after the fire disaster are reduced to the minimum, and losses of users are reduced.

The invention relates to an electric car battery swap station power battery thermal runaway emergency disposal system. The system comprises a closed tank type battery shelf, a gas extinguisher, an electrical control device, a fume extractor and a fire-resistant rolling shutter door wherein the battery shelf is internally layered; each layer is divided into a plurality of zones; all the zones are physically partitioned through fireproof plates; each zone is internally provided with at least one power battery and internally provided with a power battery thermal runaway sensing device; the gas extinguisher communicates with all the zones through gas pipelines and nozzles independently; the electrical control device is in signal connection with the gas extinguisher and the power battery thermal runaway sensing devices; a blast capacity power device of the fume extractor is in signal connection with the electrical control device; in the normal state, the blast capacity power device operates with a low blast capacity, and the fume extractor is used as a radiating air flue; in the thermal runaway state, the blast capacity power device operates with the maximum blast capacity; and the fire-resistant rolling shutter door is in signal connection with the electrical control device.

The invention discloses a fire-fighting coordinated control system. The fire-fighting coordinated control system comprises a fire-fighting module, an evacuation module and a fire control room, whereinthe fire-fighting module includes a fire detector, a manual alarm button, a smoke evacuation system, a fire door, a fireproof roller-blind door, a fire hydrant pump and a gas extinguishing device; the fire detector includes smoke detectors and heat detectors which are arranged at a plurality of positions; the evacuation module includes extension telephones for fire-fighting, a fire emergency broadcasting system, a fire alarm, an evacuation indication system and fire-fighting emergency lighting; each extension telephone for fire-fighting is individually linked with an operator for fire-fighting; the fire control room includes a fire alarm controller, a fire-fighting linkage controller, fire-fighting control graph display, the operator for fire fighting and a fire-fighting power supply monitor; and the fire-fighting linkage controller is used for linkage control of the equipment of the fire-fighting module and the evacuation module. By means of coordination between the fire-fighting module, the fire control room and the evacuation module, the fire-fighting coordinated control system performs linkage control of working of fire-fighting equipment, and can timely put out a fire and guide the masses to evacuate.

The invention discloses a fire extinguishment system and a fire extinguishment method in a fabrication bin of an electrochemical energy storage station based on gas extinguishment and mechanical ventilation and heat dissipation. The system comprises automatic gas extinguishment systems, a pressure relief system and a mechanical ventilation and heat dissipation system. The automatic gas extinguishment systems are correspondingly positioned at the two sides of two rows of battery cabinets in order to realize precise automatic fire extinguishment when thermal runaway occurs in a lithium ion battery; the pressure relief system is positioned above the short side of the prefabrication bin and can be automatically started for relieving the pressure when the pressure inside the prefabrication binis too high; the mechanical ventilation and heat dissipation system consists of an air charging fan, an exhausting fan and a water mist sprayer which are positioned at the two short sides of the prefabrication bins and are in diagonal distribution; and the mechanical ventilation and heat dissipation system is controlled by virtue of a smoke sensor and a pressure sensor so as to realize smoke discharging and temperature reduction functions. The fire extinguishment system and the fire extinguishment method disclosed by the invention can be used for quickly extinguishing a fire of a battery and discharging high-temperature smoke in time, thereby reducing the temperature of the battery and guaranteeing high-efficiency safe running of an energy storage system in the prefabrication bin.

The invention discloses a design method of an IG541 gas fire extinguishing system which essentially consists of a high pressure gas storage bottle, a gas delivery pipeline, a pressure reducing device, a gas nozzle, a fire detection device and a gas blowing controlling system. A dynamic design calculation method is adopted by the method, high pressure gas is blown to each protective area through the pipeline from the gas storage bottle, the continuous change process of gas pressure and flow of each node in the pipeline system is dispersed, the continuous process is dispersed by overlaying 0.1s time slides, the gas pressure and flow in each time slide is considered to be constant in the current time slide, the pressure and gas flow of each node in the pipeline system are calculated in each time slice respectively so as to carry out design calculation of the pipeline system in the gas fire extinguishing system. By adopting a dynamic design philosophy, the calculation result is accurate and scientific, thereby not only extinguishing fire reliably, but also ensuring that people are not suffocated as a result of large amount of gas blown in the protected area in the case of fire.

The invention discloses an inert gas intelligent fire extinguishing system based on infrared imaging temperature measurement. The inert gas intelligent fire extinguishing system comprises an infrared thermal imager, an infrared sensor and a smoke sensor which are connected with a supervision center server and a supervision center database through a transit network. The supervision center server is connected with a fire alarm device, a mobile phone terminal, a PC terminal, a firefighting linkage control center and an inert gas fire extinguishing device. According to the inert gas intelligent fire extinguishing system based on infrared imaging temperature measurement, potential fire risks can be found in time in the early stage that the temperature of equipment and cables rises, mobile phone remote alarm is sent out, and the enough time is provided for managers to conduct remote fire extinguishing and intelligent automatic fire extinguishing.

The invention relates to an inert gas fire-extinguishing system for reducing the risk of and extinguishing fires in a protected room. So as to have the inerting of the protected room ensue according to different variable sequences of events, the inert gas fire-extinguishing system includes a pressure-reducing device having at least two parallel branches, wherein each parallel branch has a pressure-reducing mechanism. Each parallel branch is connectable to a high-pressure collecting line and a low-pressure extinguishing line via a controllable valve, whereby each pressure-reducing mechanism is designed to reduce a high input pressure to a low output pressure according to a known pressure-reducing characteristic curve.

The invention discloses a fire extinguishing plant of an energy storage system, comprising a sprinkler device, a smoke drying device, a water retaining device, and a water drainage device, wherein, the sprinkler device is used for spraying running water at the ablaze battery module, the smoke drying device is used for discharging smoke on the fire point and drying the battery module when water spraying stops, and the water retaining device is arranged opposite to the sprinkler device for blocking the water sprayed from the sprinkler device to prevent the water from flowing around any region outside the ablaze battery module and allowing the water to enter the water drainage device to discharge. According to the invention, water is used for fire extinguishment and simultaneously smoke discharge is carried out, thus the speed of fire extinguishment is fast, the smoke is little, inflammable gases released from the battery can be rapidly removed by timely smoke discharge in the fire extinguishing process, the danger of gas suffocation is avoided, the explosion risk caused by accumulation of inflammable gases injected by the battery in the process of using gas for fire extinguishment is avoided, and the electric shock caused by chaotic water flow is effectively avoided by the water retaining device and the water drainage device.

The invention discloses a fragment-free fire extinguishing bomb with a gaseous extinguishing agent. The fragment-free fire extinguishing bomb of the gaseous extinguishing agent comprises a shell (3), a detonator (7), an empennage (1), a safe speed reducing section (2), a speed reducing umbrella (11), a main charge explosive (6), an explosive filling section (8), a blocking sheet (4), a transition section (5), a bottle breaking cone (9) and an gaseous extinguishing agent (10). When the fire extinguishing bomb works, the detonator (7) sends an ignition signal to ignite the main charge explosive (6) in the explosive filling section (8); the main charge explosive (6) combusts and generates high pressure; the high pressure pushes the bottle breaking cone (9) to prick the blocking sheet (4); the gaseous extinguishing agent (10) is sprayed out of a spraying hole in the side wall of the transition section (5) to spray the gaseous extinguishing agent (10). The fire extinguishing bomb is fragment-free in the working process; the single fire extinguishing bomb is high in fire extinguishing efficiency; the fire extinguishing bomb is applicable to urban high building or forest fires.

A remote control system for the gas fire-extinguishing system is composed of control cabinet, fire-extinguishing unit and RS485 communication bus. Said control cabinet consists of industrial PC host, display, keyboard, mouse, UPS communication module, accumulator and input device. Said fire-extinguishing unit comprises fire-extinguishing gas tank, master valve, selection valve, refrigerating set and controller.

The invention relates to a flow characteristic testing device of a nozzle of a gas fire-extinguishing system. The flow characteristic testing device comprises three parts of a weighing device, a pressure measuring device and a data acquisition device. The flow characteristic testing device is characterized in that the weighing device mainly comprises a weighing bench, a balancing bench, a base, alever and a load sensor; the weighing device is designed through a lever principle method; and the weighing device is designed into a lever with unequal arms. Therefore, an extinguishant storing steel cylinder with large mass can be balanced with a weight with small mass; processes are convenient; measured values are visible; operation is convenient; errors are relatively small; and flow characteristic calculation of a nozzle of a gas fire-extinguishing system is realized according to gas extinguishant mass parameters obtained through mass measurement of a gas extinguishant storing steel cylinder in a spraying process. The flow characteristic testing device is suitable for flow characteristic tests of nozzles of a single-phase gaseous fluidized gas fire-extinguishing system and a gas-liquid two-phase fluidized gas fire-extinguishing system.

The invention discloses a fire-extinguishing agent gas pressure network monitoring system of a gas fire-extinguishing system bottle unit. The fire-extinguishing agent gas pressure network monitoring system comprises a gas fire-extinguishing system bottle unit local module, a network transmission module and a remote monitoring module. The gas fire-extinguishing system bottle unit local module is connected to the remote monitoring module by the network transmission module. The fire-extinguishing agent gas pressure network monitoring system realizes long-distance monitoring (based on the internetwork) and alarming of all bottle units of a gas fire-extinguishing system, can realize query of fault unit names and addresses by setting, and comprises an intelligent network monitoring and alarming system having a geographic position guide function. When pressure of the fire-extinguishing agent gas pressure network monitoring system is lower than a specified value, the fire-extinguishing agent gas pressure network monitoring system carries out automatic alarm so that internet-based remote monitoring and alarming are realized. The exploitation and application of the fire-extinguishing agent gas pressure network monitoring system of a gas fire-extinguishing system bottle unit can satisfy fire-extinguishing system requirements well.

The invention discloses a micro-nano fire extinguishing capsule which comprises the following raw materials, by weight, of 10-50 parts of a fire extinguishing agent, 2-5 parts of a coating material, 0.1-1 part of organic silicon oil and 1-5 parts of nano white carbon black. A preparation method includes the steps that (1) the gas fire extinguishing agent and the coating material are uniformly mixed under the pressure of 3 Mpa; (2) the organic silicon oil and the nano white carbon black are added in sequence; and (3) a finished product is obtained after uniform stirring and packaging. According to the micro-nano fire extinguishing capsule, the gas fire extinguishing agent is used as the main material, and by utilizing the characteristic that the microcapsule can stably adsorb other substances and facilitate preservation, the fire extinguishing agent and the microcapsule are fully mixed and other auxiliary materials are added. Storage and transportation of the fire extinguishing agent are achieved, and meanwhile, the advantages of a dry powder fire extinguishing agent and the gas fire extinguishing agent are combined to achieve the purpose of improving the fire extinguishing efficiency.

The invention discloses an energy storage battery compartment fire extinguishing system which comprises a prefabricated compartment. A plurality of energy storage battery boxes are arranged in the prefabricated compartment, fire detectors are arranged in the energy storage battery boxes, and the fire detectors are electrically connected with the signal input end of a fire alarm controller; and thesignal output end of the fire alarm controller is connected with a gas fire extinguishing system and a water mist fire extinguishing system. A fire extinguishing method of the energy storage batterycompartment fire extinguishing system comprises the following steps that the type of a fire occurring in the energy storage battery boxes is judged according to a detection result of the fire detectors, specifically, when the fire type is an electrical fire, the gas fire extinguishing system is started to extinguish open fire, and then the water mist fire extinguishing system is started to cool; and when the fire type is a battery fire, the water mist fire extinguishing system is started to extinguish the fire and cool. According to different characteristics of battery and electrical fires, the fire can be found in time and different action strategies can be adopted, fire development is restrained to the maximum extent, and losses are reduced to the minimum.

The invention provides an automatic fire extinguishing system using a gaseous extinguishing agent, the automatic fire extinguishing system includes a fire extinguishing agent storage device, a fire extinguishing agent output tube, a gas generator, a smoke- fire detection device and a control system, the smoke- fire detection device is used for detecting a smoke- fire signal in a fire prevention area and sending the smoke- fire signal to the control system, the control system command instructs the gas generator to generate, a gas generated by the gas generator starts the fire extinguishing agent storage device, the fire extinguishing agent storage device outputs an extinguishing agent to the fire extinguishing agent output tube, the fire extinguishing agent output tube sprays the extinguishing agent to the fire prevention area, and fire extinguishing agent storage devices starting according to fire conditions are arranged in the fire extinguishing agent storage device. The automatic fire extinguishing system can release fire extinguishing agent dosage according to fire conditions to ensure that fire in each detection area in fire condition can be extinguished by a fire extinguishing agent, and the fire extinguishing dosage agent can be automatically adjustable according to the requirement.

The invention discloses a fire extinguishing system and method for an energy storage power station or a battery container, and aims to improve a fire extinguishing system for a lithium ion battery fire in the energy storage power station and the container based on the thermal runaway combustion characteristic of a lithium ion battery and aiming at the condition that after open fire of the lithium ion battery is extinguished, re-combustion and thermal runaway spreading are generated, the detection of the thermal runaway and fire of the battery is optimized, and a liquid reburning inhibitor is introduced. Fire extinguishing can be conducted by considering the whole system and the fire of an ignition point, meanwhile, the possibility of false alarm can be effectively avoided, and high accuracy is achieved. Secondly, the liquid reburning inhibitor is introduced while a gas extinguishing agent is used in the fire extinguishing system, the gas extinguishing agent can effectively extinguish open fire generated by thermal runaway of the battery, the liquid reburning inhibitor can effectively inhibit reburning and smoke generation of the battery and thermal runaway spreading, and the safety coefficient is higher.

The invention relates to a dual-drive mixing fine water mist fire-extinguishing system, which comprises an external steel cylinder, liquid-state carbon dioxide, a magnetic induction generator, an electric starter, a steel cylinder ejection switch, a gas pipeline, a water level probe, a fire extinguishing agent storage tank, a fire extinguishing agent, a built-in fire extinguishing agent ejection pipeline, a water storage tank spraying nozzle switch, a pressure limiting protection valve, a base bracket, a fastening snapping ring, an external fire extinguishing agent ejection pipeline and a fine water mist spraying nozzle. According to the dual-drive mixing fine water mist fire-extinguishing system of the present invention, the high temperature gas generated after liquid-state carbon dioxide gasification is adopted as the power source, the liquid fine water mist and the gas carbon dioxide are adopted as the fire extinguishing medias, and the two fire extinguishing ways such as the gas fire extinguishing and the fine water mist fire extinguishing are used during the fire extinguishing, such that the defects that the gas fire extinguishing requires the sealed space and the fine water mist fire extinguishing can not bypass the obstructions and directly contact the combustion zone is overcome to a certain extent, the advantages of the two fire extinguishing ways are completely provided, and the defects of the two fire extinguishing ways are overcome, wherein the most significant characteristic such as the complete advantage providing and the defect overcome of the system of the present invention is distinguished from the previous single fire extinguishing way.

The invention relates to a gaseous extinguishing agent concentration measure apparatus, which comprises a constant temperature constant current micro differential pressure generator, a data acquisition system, a suction pump, a gas parallel device, a connecting pipe and a flow controller; the data acquisition system is composed of a micro differential pressure sensor and a computer data acquisition system; a gas outlet is provided at one end of the gas parallel device, four gas inlets are provided at the other end, the gas outlet is connected to the gas inlet of the suction pump, the suction pump discharges the collected test samples out of the measure system through each hole and the gas parallel device, a hole is opened at the center of the constant temperature constant current micro differential pressure generator, eight apertures are uniformly opened at the surrounding of the hole, adjacent a pair of apertures in eight apertures are one group, a porous medium with easy heat transfer is placed in one aperture of each aperture, a plurality of wire pipes can be placed in other aperture, gas pressure at two ends of the wire pipes is sent to the micro differential pressure sensor, an output signal of the micro differential pressure sensor is sent to a computer data acquisition system for analysis and storage. The gaseous extinguishing agent concentration measure apparatus can rapidly and effectively measure the concentration of the gaseous extinguishing agent.

The invention discloses a low-pressure carbon dioxide intelligent fire-fighting vehicle, which comprises a vehicle provided with a rotary table, a storage tank, a refrigerating machine and an oil tank. The rotary table is provided with multiple stages of variable-amplitude arms; the front end of the top variable-amplitude arm is provided with a working arm assembly; the working arm assembly comprises a hydraulic motor, a key shaft, a hinged support, an air cylinder and a cylinder barrel; a hollow piston rod is arranged in the air cylinder and the cylinder barrel; the front end of the piston rod is fixedly connected with an impact head; a blind hole is arranged in the impact head; the front end of the impact head is provided with a plurality of jet holes; the front port and the rear port of the cylinder barrel are respectively and mutually connected with a reversing valve; the oil inlet of the reversing valve is mutually connected with an oil pump and the oil inlet of a bypass reversing valve; the working port of the bypass reversing valve is also mutually connected with a rear port on the cylinder barrel through a valve; and the connected oil line of the bypass reversing valve and the valve is provided with an energy accumulator. According to the low-pressure carbon dioxide intelligent fire-fighting vehicle disclosed by the invention, a gas extinguishing agent can be effectively conveyed to a high-rise, and meanwhile, the outer walls or doors and windows of a building are broken, thus, effective extinguishment can be implemented on the high-rise building or the interior of the high-rise building, and the long-term operation of equipment is ensured.

The invention discloses a device for testing concentration of a gas extinguishing agent and a testing method of the device. The invention is characterized in that a gas filter, a heating and temperature control module, a flow control module, a concentration test module, a data processing module and a serial port communication module are assembled in a case body; a gas inlet is formed at the front end of the case body and a vacuum pump is connected to the rear end of the case body; the communication with a computer is achieved through a serial port; and the gas extinguishing agent concentration data is transferred to the computer after data processing. The gaseous mixture of air and gas extinguishing agent is pumped into the testing device through the vacuum pump, treated by the gas filter to remove foreign substances and heated to a preset temperature by a gas heater and then flows into the concentration test module; after the concentration data is obtained based on the thermal film sensing principle, the gaseous mixture is discharged through the outlet of the vacuum pump; the concentration data is processed by the data processing module to obtain concentration values of the gas extinguishing agent; and the concentration curve of the gas extinguishing agent is recorded by the computer. The device and method can be widely applied to test concentrations of different types of gas extinguishing agents and provide a support for evaluating fire extinguishment performance of gas extinguishing systems.

The invention discloses a dust explosion-proof protection system of a grain / feed / granular powder grinding apparatus in an embodiment to avoid the risk of dust explosion caused by dust cloud explosion in a grinding processing region due to generated sparks and induced combustion during grinding processing of the grain / feed / granular powder grinding apparatus. The dust explosion-proof protection system of the grain / feed / granular powder grinding apparatus in the embodiment of the dust explosion-proof protection system comprises a grinding apparatus emergency braking interlocking device mounted in dust explosion-proof association with the grinding apparatus, a powder falling settling chamber and a powder conveying system, a magnetic-absorption separation device for metal foreign bodies, the powder conveying system, an air exhausting system, a dust removing apparatus, a spark detection device, a gas fire-extinguishing device, an explosion-proof device, a temperature monitoring device, a fire-extinguishing water spraying device, an interlocking protector and an interlocking protector control system.

The invention provides an automatic fire extinguishing system and an automatic fire extinguishing method thereof. Fire extinguishing is conducted through heptafluoropropane. The automatic fire extinguishing system comprises a fire detecting unit, a gas fire extinguishing controller unit, an equipment linkage unit, a delay unit, a fire alarm displaying unit and a gas fire extinguishing unit, wherein the fire detecting unit is used for detecting whether a fire happens or not; the gas fire extinguishing controller unit is used for starting a fire extinguishing procedure after the fire detecting unit detects that the fire happens; the equipment linkage unit is used for turning off a power source and stopping a fan on site; through the delay unit, the delay time which is 0-30 s is set, and thenthe fire extinguishing unit is started; the fire alarm displaying unit is used for conducting sound-light alarm; and the gas fire extinguishing unit is started for fire extinguishing after the delaytime of the delay unit is finished. According to the automatic fire extinguishing system, the equipment linkage unit is arranged, and thus, the fan and the dangerous power source which influence the fire extinguishing effect can be stopped and turned off when the fire happens; and moreover, due to the fact that the delay unit is arranged, evacuation time can be reserved for field staff, fire extinguishing is conducted, the fire extinguishing safety is improved.

The invention provides a fire-fighting monitoring system for a library. The system is characterized by comprising a control module, an alarm module, a monitoring module, a fire extinguishing system module and an evacuating system and further comprising a power supply and distribution management module, an infrared detection module and a tail end drainage system, wherein the alarm module comprises an automatic alarm and a manual alarm; the monitoring module is connected with the control module through a communication module and comprises a smoke detector, a temperature detector and a camera; the fire extinguishing system module comprises an automatic nozzle system, a fire extinguisher box, a fire hydrant and a gas fire extinguishing device; the evacuating system comprises indicating lamps and a voice broadcasting device, the indicating lamps are uniformly distributed at corners formed by walls of a fire fighting access and the ground, and the indicating lamps and the voice broadcasting device are powered by an emergency power supply. Whether a fire occurs can be detected, and fire extinguishment and personnel evacuation can be performed in case of the fire; the gas fire extinguishing device is adopted above a shelf, books can be protected during fire extinguishment, and the economic loss can be reduced.