242 results about "Fire damper" patented technology

The utility model relates to the technical field of smoke exhaust fireproof valves, in particular to a smoke exhaust fireproof valve with a filtering mechanism, which comprises a smoke exhaust pipe, a water storage frame fixedly connected with the inner wall of the smoke exhaust pipe, and a filtering plate fixedly connected with the inner wall of the smoke exhaust pipe. The cleaning mechanism comprises a round frame rotationally connected to the inner wall of the filter plate; according to the device, through a water pump, a water storage frame, a round frame and a mounting frame, a nozzle in annular movement sprays water to the surfaces of a filter plate and a scraper, the flushing effect on the filter plate and the scraper is guaranteed, through an abutting block and a blocking pad, the scraper transversely moves in the mounting frame, attached impurities are shaken off in the back-and-forth movement of the scraper, and the cleaning effect of the filter plate and the scraper is guaranteed. Compared with an existing mode that the impurities attached to the scraping plate are prone to being attached to the filter plate again, in the mode, the scraping plate is cleaned in time, the impurities are prevented from being attached to the filter plate again, and the smoke filtering effect of the filtering mechanism is guaranteed.

The utility model discloses a flame arrester fire-retardant chip production device which comprises an operation table, the bottom face of the operation table is movably connected with a second extrusion wheel, the center of the top face of the operation table penetrates through a second through groove, the second extrusion wheel is movably connected in the second through groove in a penetrating mode, the top face of the operation table is connected with a top plate in a telescopic mode, and the center of the top face of the top plate penetrates through a first through groove. The top face of the top plate is fixedly connected with two handles in mirror symmetry, the side face of the top plate is movably connected with a limiting piece, the limiting piece is fixed to the top face of the operation table, and the bottom face of the top plate is movably connected with a feeding piece. Adjustment of the distance between the first extrusion wheel and the second extrusion wheel and pressure adjustment of the pressure device can be completed at the same time only by adjusting the distance between the top plate and the operation table.

The application discloses a fire-resisting vacuum pressure breather valve and particularly relates to the technical field of breather valves, which comprises a shell, an exhaust valve plate arranged in the shell, a buffer block arranged above the exhaust valve plate, a piston cavity formed in the buffer block, a damping cavity arranged outside the piston cavity, a piston part arranged in the piston cavity and connected with the exhaust valve plate, a one-way air inlet mechanism arranged at the bottom of the piston cavity, a one-way air outlet mechanism arranged on the side wall of the piston cavity and located below the piston part, a plurality of damping holes arranged in an array on the outside of the damping cavity, and a temperature control shielding mechanism arranged above the damping cavity and used for shielding the damping holes in a stepped manner, so that the movement speed of the piston part and the exhaust valve plate is negatively correlated with temperature. The application can adjust the opening time of the exhaust valve plate according to temperature, and can reduce the influence of mechanical wear or low-temperature icing on the sensitivity of the valve body as much as possible.

The invention relates to the field of containers, and provides a container and a container type generator set. The problem that the safety is still poor due to the fact that the design of a fireproof partition is insufficient can be solved. The container comprises a container body and a fireproof device, an air inlet and an air outlet are formed in the side wall of the container body, the air inlet and the air outlet are located in the two sides of working equipment, and a cooling air duct is formed between the container body and the external environment; the fireproof device is located in the box body and comprises at least two fireproof valves, and temperature sensors are arranged on the fireproof valves; the at least two fireproof valves are respectively positioned on the inner sides of the air inlet and the air outlet; the temperature sensor monitors the temperature in the box body and sends a signal to the fireproof valve when the temperature reaches a preset value, and the fireproof valve closes the cooling air duct.

The application relates to a high-sealing fireproof air brake for a ship, which comprises a frame, a plurality of square blades for closing a ventilation channel in the frame after rotation, and a driving device; hollow edge columns are arranged on two inner side walls of the frame located on both sides of the air flow direction of the ventilation channel; first water through holes are arranged on the two hollow edge columns, and water injection pipes are communicated with the two hollow edge columns; the square blades are hollowly arranged and both ends of the square blades are provided with second water through holes; when the ventilation channel in the frame is closed after the rotation of the square blades, the two square blades located at the most edge are communicated with the corresponding hollow edge columns through the second water through holes of the square blades and the first water through holes of the corresponding hollow edge columns, and the second water through holes of the two adjacent square blades are communicated. The application has the advantages of high sealing.

The utility model relates to the technical field of biomass boilers, in particular to a material locking and backfire preventing device of a biomass boiler, which not only can quantitatively convey biomass into the boiler according to the combustion efficiency of the boiler and improve the use flexibility of the device, but also can avoid backfire through double blocking of locking air and a fire damper. Comprising a biomass boiler which is installed on the ground. The biomass boiler further comprises a quantitative conveying mechanism, an anti-backfire mechanism, a direct conveying mechanism, a driving mechanism and an air supply mechanism, the quantitative conveying mechanism is installed on the biomass boiler and conveys biomass into the anti-backfire mechanism in a quantitative mode, and the anti-backfire mechanism is installed on the quantitative conveying mechanism and avoids backfire; the direct conveying mechanism is installed on the anti-backfire mechanism and conveys biomass into the biomass boiler, the driving mechanism is installed on the direct conveying mechanism and drives the direct conveying mechanism to convey the biomass, and the air supply mechanism is installed on the driving mechanism and accelerates conveying of the biomass to avoid backfire.

1. The name of the design product: fire cover. 2. The use of the design product: used for plant oil stove fuel gasification fire cover. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model discloses a fuel oil tank of a container unit, belongs to the technical field of fuel oil tanks of container units, and solves the problem that the use condition of the fuel oil tank cannot be monitored in real time. The fuel oil tank of the container unit comprises a fuel oil tank body, an oil return opening and an oil filling opening are formed in the top of the fuel oil tank body, a fire-retardant breather valve is further arranged at the position, between the oil return opening and the oil filling opening, of the top of the fuel oil tank body, and an overflow opening, an oil outlet and an oil discharging opening are formed in the side face of the fuel oil tank body. The overflow port is located at the top of the side face of the fuel oil tank body, the oil outlet and the oil discharge port are both located at the bottom of the side face of the fuel oil tank body, a dirty oil port is formed in the bottom of the fuel oil tank body, an oil supporting disc is arranged below the fuel oil tank body, and an oil leakage detector is arranged in the oil supporting disc. The fuel oil tank of the container unit is favorable for improving the safety of the fuel oil tank during use.

The utility model discloses a durable fireproof valve structure, which comprises a valve body frame, an electric actuating mechanism, at least two groups of rotating shafts, a blade piece, a connecting seat and a connecting rod, the two ends of the rotating shafts are movably connected in the valve body frame through shaft sleeves, the rotating shafts are uniformly arranged in parallel, one rotating shaft is fixedly connected with the rotating end of the electric actuating mechanism, and the other rotating shaft is fixedly connected with the blade piece. The blade pieces are fixedly connected to the rotating shaft, the blade pieces are matched with one another, the connecting bases are arranged on the back faces of the blade pieces respectively, the connecting rods are movably connected with the connecting bases through the pin shafts respectively, and the surfaces of the valve body frame and the surfaces of the blade pieces are sprayed with indoor expansion type steel structure fireproof paint. The indoor expansion type steel structure fireproof coating is sprayed on the surfaces of the valve body frame and the blade piece, so that the valve body frame and the blade piece can be effectively prevented from deforming in a long-term high-temperature environment, and the sealing performance and the service life of equipment are guaranteed. The utility model has the advantages of simple structure, safety, effectiveness, good use effect and the like.

The present invention discloses an air-conditioning smoke exhaust fire damper with a smoke filtering function, comprising: a limiting ring, arranged in the smoke exhaust pipe; a valve plate, movably arranged in the limiting ring, the valve plate selectively sealed and connected to the limiting ring; a mounting cylinder, detachably connected in the smoke exhaust pipe and located on one side of the limiting ring; at least two filter screens, spaced apart and arranged in the mounting cylinder; a cleaning device, arranged between the two filter screens, the cleaning device utilizes the airflow in the smoke exhaust pipe to generate vibration to clean the filter screen. In order to improve the convenience of installing and removing the filter screen, this is achieved by detachably connecting the mounting cylinder to the smoke exhaust pipe. When the filter screen needs to be cleaned, it can be removed. In order to prevent the filter screen from being blocked, a cleaning device is arranged between two of the filter screens. The cleaning device removes particles on the filter screen by vibration. As long as there is airflow passing through the smoke exhaust pipe, the filter screen can be cleaned to prevent particles from adhering for a long time.

The utility model discloses a smoke exhaust fireproof valve convenient to maintain, which relates to the technical field of fireproof valves and comprises a valve body, a connecting seat is arranged at the top end of the valve body, a valve plate is arranged in the center of the inside of the valve body, a fixing plate is vertically arranged in the middle of the valve plate, and four cross-shaped inserting rods are arranged on the side wall of a valve rod. Cross-shaped inserting grooves matched with the four cross-shaped inserting rods are formed in the positions, corresponding to the four cross-shaped inserting rods, of the fixing plate, and a fixing sleeve is detachably arranged on the front side of the fixing plate. The cross-shaped inserting rod is matched with the cross-shaped inserting groove, rapid inserting installation between the valve plate and the valve rod is achieved, the cross-shaped fixing groove in the fixing sleeve is further matched with the inserting rod in an inserting mode, and when the valve plate needs to be maintained or replaced, only the fixing bolt on the fixing sleeve needs to be screwed out, the fixing sleeve is taken down, and the valve plate can be assembled and disassembled. And the valve plate can be easily detached from the valve rod, the operation is simple and convenient, and the maintenance efficiency is greatly improved.

Provided in the present application are an energy storage system, an electric ship, and a fire-extinguishing method. The energy storage system comprises an enclosure and a fire-extinguishing system, wherein a battery compartment and an electrical compartment which are isolated from each other are provided in the enclosure; the fire-extinguishing system comprises an exhaust fan, a first fire damper and a second fire damper which are mounted on the enclosure; and when the battery compartment is in a first state, the exhaust fan works, the first fire damper and the second fire damper are opened, the first fire damper cooperates with the exhaust fan, and an external gas enters the battery compartment by means of the second fire damper.

The utility model relates to the technical field of smoke exhaust fireproof valves, and particularly discloses a smoke exhaust fireproof valve which is characterized in that mounting plates are arranged at the two ends of a frame respectively, and a containing space is formed in the frame; the executing mechanism is mounted on the outer side of the outer wall of the frame and is opposite to the accommodating space; two ends of the rotating shaft are rotatably connected with the frame, one end is connected with the executing mechanism, and the other end extends into the accommodating space; the valve plate is fixedly connected to the outer side of the outer wall of the rotating shaft and matched with the inner wall face of the frame in shape. The baffle is contracted in the wall face of the frame, so that the smoke exhaust channel is completely unblocked, the smoke exhaust effect is greatly improved, it is ensured that smoke and the like can be smoothly and efficiently exhausted through the smoke exhaust channel in the scene where smoke needs to be exhausted, it is ensured that the valve plate can be tightly closed when the fireproof and smoke-proof requirements are met, smoke and fire spreading is effectively blocked, the high efficiency of smoke exhaust is ensured, and the smoke exhaust effect is improved. And the fireproof and smoke-proof reliability is improved.

The utility model discloses a fire-fighting smoke exhaust fireproof valve convenient to install, and relates to the field of fire safety, the fire-fighting smoke exhaust fireproof valve convenient to install comprises an air deflector, the outer wall of the air deflector is fixedly connected with a plurality of ventilation pipes, the tops of the ventilation pipes are fixedly connected with a fixing frame, and the inner wall of the fixing frame is fixedly connected with a motor; the top of the ventilation pipe is fixedly connected with a fixing plate, the output end of the bottom of the motor is fixedly connected with a rotating shaft, the connecting rod is arranged, when the ventilation pipe is installed, the push rod can be pushed, and when the push rod is pushed, the connecting rod is driven to move; after the connecting rods are pushed to a proper size, the connecting rods are inserted into the connectors for connection, the hinges are buckled after the connecting rods are connected, the inserting rods on the hinges are inserted into the connectors, and finally the screws are screwed into the threaded holes to complete installation, so that the purposes that installation is rapid, time and labor are saved, and the connecting rods can be adjusted to proper positions for installation according to different pipelines are achieved; and the working efficiency during pipeline installation is improved.

The utility model discloses a fire resisting shutter controller with a sealing mechanism, which comprises a fire resisting shutter controller body, the fire resisting shutter controller body comprises a first protective shell and a second protective shell, the second protective shell is arranged outside the first protective shell, a spring and a jacking component are arranged between the first protective shell and the second protective shell, and the sealing mechanism is arranged between the first protective shell and the second protective shell. A fireproof component is embedded into the outer surface of the second protection shell, a first blind hole thread is arranged on the second protection shell, the jacking component comprises a fixing part and a telescopic component arranged on the fixing part, the fixing part is a cylindrical rod, a sinking groove is formed in the top of the cylindrical rod, the telescopic component is an insertion rod, and the insertion rod is inserted into the sinking groove. And meanwhile, springs are arranged at the ends of the inserting rods, lapping grooves are formed in the inner side wall of the second protective shell, and inserting fixing rods are further arranged between the first protective shell and the second protective shell. The beneficial effects of the utility model are that the buffer part is arranged between the two sealing mechanisms to improve the fireproof effect of the protective housing.

The utility model provides a full fresh air anti-condensation circulating system for an anti-explosion refrigeration house. Belongs to the technical field of refrigeration engineering. The all fresh air anti-condensation circulation system comprises a PLC (programmable logic controller), a refrigerating device, a fresh air device, an exhaust device, an air supply device, a defrosting air device and a heat exchanger. Wherein the fresh air inlet assembly is sequentially connected with the heat exchanger, the fresh air check valve and a fresh air inlet of the evaporation chamber through a fresh air pipe, and the superheater is located in the fresh air pipe connecting the heat exchanger and the fresh air check valve; an exhaust air outlet of the explosion-proof refrigeration house is sequentially connected with a first exhaust air check valve, an exhaust air fireproof valve, a heat exchanger, an exhaust air fan, a second exhaust air check valve and an exhaust air outlet assembly through an exhaust air pipe, and a subcooler is located in the exhaust air pipe. By means of the full fresh air design, the efficient heat exchange and supercooling technology, intelligent control and the like, the anti-condensation and anti-explosion safety problems in the anti-explosion refrigeration house are solved, and the energy efficiency level and the operation reliability of the system are remarkably improved.

The utility model discloses a fire damper installation positioning and fastening device, which relates to the technical field of fire damper installation, and comprises a fire damper assembly, a connecting block, a positioning assembly, a fastening assembly and a connecting pipeline, the fire damper assembly comprises a fire damper body and a switch valve, the switch valve is installed at the top of the fire damper body in a threaded manner, and the connecting block is connected with the positioning assembly. The positioning assembly is arranged in the connecting block and comprises a positioning column, and the fastening assembly comprises a fastening spring and a fastening steel ball. Under the combined action of the connecting block, the positioning connecting hole, the positioning column and the positioning spring, the positioning column is aligned with the positioning connecting hole, then the fireproof valve body is connected with the connecting groove, the fireproof valve body is slid, and when the positioning connecting hole in the fireproof valve body and the positioning column are located at the same position, the positioning spring pops up the positioning column, so that the fireproof valve body is fixed. The fireproof valve body is connected with the connecting pipeline through the positioning connecting hole, and operation is easy.

The utility model relates to the technical field of fireproof valves, and provides a novel adjustable fireproof valve which comprises a shell, a connecting shaft is fixedly embedded in the lower end of one side in the shell, a fireproof plate is movably arranged on the outer surface of the connecting shaft in a sleeved mode, the fireproof plate is movably embedded in the shell, and the novel adjustable fireproof valve further comprises two arc-shaped grooves. The two terminals are arranged on opposite surfaces in the shell; the shell is fixedly installed in the channel, the fireproof sensor transmits a fire signal to the electric push rod when receiving the fire signal, the electric push rod pushes the fireproof plate to rotate on the outer surface of the connecting shaft through the connecting block, so that the fireproof plate seals the interior of the shell, the electric push rod can also play a supporting role, and the stability of the fireproof plate is improved; and a rectangular sealing gasket is fixedly installed and attached to the fireproof plate, the tightness of the fireproof plate and the shell is improved, flames or smoke are prevented from entering the channel, limiting blocks are fixedly installed on the two sides of the upper end of the fireproof plate, the limiting blocks are movably embedded in arc-shaped grooves, and the stability of the fireproof plate is improved.

The present application provides a kind of railway rescue station and personnel evacuation and smoke control method of service tunnel.The railway rescue station includes service tunnel, evacuation horizontal passage, protective door, smoke exhaust air duct, fireproof partition sealing device, smoke exhaust fire damper, fan, jet fan, smoke outlet, wind speed and direction sensor and evacuation platform.The present application provides a kind of evacuation and rescue scheme of smoke exhaust air shaft near railway tunnel emergency rescue station, realizes directly using advance guide pit (service tunnel) for geological exploration as smoke exhaust passage, avoids setting smoke exhaust air duct on the top of service tunnel, causes construction risk and engineering investment to increase due to the fact that service tunnel section is too large.In addition, using wind speed and direction sensor and jet fan, prevent smoke from spreading to both ends of rescue station fire tunnel under the condition of ensuring smoke exhaust effect, improve the safety of other trains in super-long tunnel, and reduce the influence range of smoke on tunnel facilities, which is beneficial to rapid recovery after disaster.

The utility model belongs to the technical field of smoke exhaust fireproof valves, and particularly relates to a smoke exhaust fireproof valve which comprises a valve body, the left end of the valve body is fixedly connected with a valve seat, the inner wall of the valve body is in contact with an installation piece, the front face of the installation piece is fixedly provided with a temperature sensor, and the back face of the installation piece is fixedly connected with a connecting plate. The connecting plate is slidably connected with the valve body, a fixing piece is fixedly connected to the back face of the valve body, an inserting plate is slidably connected to the inner wall of the fixing piece, the inserting plate is slidably connected with the connecting plate, and a spring is welded to the end of the inserting plate. Through the driving effect of the motor, the rotating disc can be driven to rotate, the valve body is integrally sealed, under the action of the fire-resistant disc and the heat-resistant disc, the fire-resistant effect of the valve body is guaranteed, a circulation pipeline is subjected to fire prevention, under the structures of the clamping hole, the clamping ball and the like, the output shaft of the motor can be limited, and the sealing effect of the valve body is improved. And therefore, the rotating disc can be accurately positioned and used.

The invention relates to the technical field of fire-fighting smoke exhaust and ventilation, and discloses a charging garage shared smoke exhaust and air exhaust system and a fireproof control device.The charging garage shared smoke exhaust and air exhaust system comprises an air inlet pipe, a controller is fixedly connected to the interior of the air inlet pipe, a main pipe is fixedly connected to the outer wall of the air inlet pipe, and a smoke exhaust pipe is fixedly connected to the outer wall of the main pipe; a smoke sensor is fixedly connected to the inner wall of the smoke exhaust pipe, a temperature sensor is fixedly connected to the inner wall of the smoke exhaust pipe, the controller is electrically connected with the smoke sensor, and the controller is electrically connected with the temperature sensor. The smoke exhaust pipe is installed on the outer side of the main pipe, the first electric fireproof valve is arranged in the smoke exhaust pipe, and meanwhile the smoke sensor and the temperature sensor are installed in the smoke exhaust pipe, so that the effects of rapidly monitoring the fire behavior of the charging garage, isolating the fire area, isolating smoke, removing smoke in the disaster area and assisting follow-up rescue work to be smoothly carried out can be achieved.

The utility model discloses a cooling device for testing the air leakage amount of a fireproof valve, which comprises a gas pipeline, a circulating water pipe is arranged in the gas pipeline, a water inlet of the circulating water pipe is connected with a first water tank, and a water outlet of the circulating water pipe is connected with a second water tank. The device breaks through the traditional thought that a connecting pipeline is immersed in water, and circulating water is arranged in the gas conveying pipeline, so that the heat exchange area is effectively increased, the heat exchange time is prolonged, and the convenient and efficient heat exchange effect is achieved.

The invention relates to the field of equipment detection, in particular to a high-corrosion-resistance fireproof valve detection system and method, and the system comprises a sensor module, a control module, a data collection and processing module, an execution module, and a display and recording module. Compared with the prior art that the performance of the fireproof valve is evaluated only by experience or simple test, and the evaluation is inaccurate and incomplete, the scheme provided by the invention has the advantages that during fire condition simulation, proper fire environment parameters are firstly set, then sensor data are collected in real time and deeply analyzed, and meanwhile, the data are compared with historical data; therefore, the performance of the high-corrosion-resistance fireproof valve can be evaluated comprehensively and accurately. According to the scheme, the evaluation accuracy is improved, the evaluation comprehensiveness is ensured, and a reliable basis is provided for further optimization and use of the fireproof valve.

The present invention discloses a novel exhaust system for a planting roof, comprising a fan, a sealing rubber sleeve arranged directly above the fan, the fan and the sealing rubber sleeve being glued together, an air blast channel installed inside the sealing rubber sleeve, the air blast channel being a hollow structure, a fire damper installed directly below the air blast channel, the outer side of a smoke exhaust valve arranged directly in front of the fire damper, an anti-slip support plate provided at the rear section of the air blast channel, the outermost layer of the anti-slip support plate being provided with a self-adhesive coating, connection holes reserved at both ends of the anti-slip support plate, a ventilation pipe installed directly above the air blast channel, the ventilation pipe being a stainless steel pipe, a ring joint installed in the middle of the ventilation pipe, the through hole reserved inside the ring joint being consistent with the size of the ventilation pipe, this novel exhaust system for a planting roof can adjust the roof exhaust according to the planting conditions of the roof plants, thereby improving the overall adjustability and preventing the roof plants from growing too lushly and affecting the roof exhaust conditions.

The utility model belongs to the technical field of smoke exhaust fireproof valves, particularly relates to a smoke exhaust fireproof valve capable of controlling the smoke exhaust amount, and provides the following scheme aiming at the problems that in the prior art, when a smoke exhaust fireproof valve is used for exhausting smoke, the smoke exhaust amount is difficult to control and adjust according to use requirements, and the use efficiency is greatly reduced. The smoke exhaust fireproof valve comprises a smoke exhaust fireproof valve body. The control box is fixedly connected to the left side of the smoke exhaust fireproof valve main body; the auxiliary plate is fixedly connected into the smoke exhaust fireproof valve main body; the first control door is connected to the front side of the auxiliary plate in a sliding manner; the second control door is connected to the front side of the first control door in a sliding mode; according to the utility model, the electric push rod is controlled to work, the electric push rod can assist the second control door in opening the smoke discharge, and when the smoke discharge amount needs to be increased, the second control door can assist the first control door in opening, so that the effect of controlling the smoke discharge amount is achieved.

The utility model relates to a special fire-fighting smoke-discharging fire damper for modern logistics storage, which comprises a rectangular outer frame on the fire damper, a horizontal upper partition plate is fixedly inserted into the upper part of the inner side of the outer frame, a plurality of blades are arranged in the outer frame on the lower side of the upper partition plate, and a beam frame with an n-shaped longitudinal section is fixedly connected onto the upper end surface of the upper partition plate. An adjusting controller is fixedly connected to the beam frame and controls rotation of the blades to achieve opening and closing of the fireproof valve. A vertical and transverse auxiliary plate is inserted into the outer frame on the upper side of the upper partition plate, the upper side edge of the auxiliary plate is bent to form an arc-shaped sleeve, the outer wall of the sleeve abuts against the upper bottom face of the inner side of the outer frame, a hinge shaft is inserted into the sleeve, and the hinge shaft is fixed to the outer frame in an inserted mode; the lower side edge of the auxiliary plate abuts against the side wall of the beam frame. The fireproof valve is provided with two channels controlled by the blades and the auxiliary plate, and the opening structure of the auxiliary plate can achieve opening of the channels in the fireproof valve after a fire disaster.

The invention discloses a fireproof air brake with a self-checking function, and relates to the technical field of fireproof air brakes. Comprising a brake frame, an opening and closing connecting rod assembly, a handle, an end cover, a flashboard assembly, a shaft cleaner and a limiting strip. When the fireproof air brake fails and cannot be closed actively, an expansion medium in an expansion cavity is used for absorbing heat in a fire disaster, the expansion medium expands and drives a push ring on a sliding rod to push a protection piece to move, and a rotary drum is unlocked; and the rotary drum drives the flashboard sheets on the rotary drum to turn over and close, so that automatic closing in a fault state is realized. After the rotary drum is unlocked, the conical head is further driven by the expansion medium to eject the self-locking block out of the self-locking sliding groove, the top of the self-locking block abuts against the inner wall of the rotary drum to generate friction, the more the expansion medium absorbs heat, the larger the thrust borne by the piston head is, the larger the abutting thrust of the self-locking block to the inner wall of the rotary drum is, and the larger the friction force between the top of the self-locking block and the inner wall of the rotary drum is. Therefore, self-locking of the rotating drum and the rotating shaft body is achieved, and the purposes of automatic closing and self-adaptive locking of the gate plate in case of failure are achieved.

The utility model belongs to the technical field of fireproof valves, and discloses a 70 DEG C fireproof valve which comprises a main body, a motor is fixedly arranged on the top face of the main body, a small gear is fixedly arranged at the tail end of a main shaft of the motor, an auxiliary gear is connected to the outer side of the small gear in a meshed mode, and a long shaft is rotationally arranged in the auxiliary gear. Fan blades are fixedly connected to the outer side of the long shaft and rotate in the main body, main gears are connected to the two sides of an auxiliary gear in a meshed mode, the long shaft rotates in the main gears, a controller is fixedly arranged on the top face of the main body, and a detector is fixedly arranged on the bottom face of the controller. The device has the advantages that the valve can be automatically closed when it is sensed that the external temperature reaches a certain height, so that flames are blocked, fire spreading is prevented, and escape time is prolonged for people in a fire scene, harm caused by fire to people is reduced, and physical and mental safety of people is protected.