557 results about "Fire door" patented technology

The invention relates to the technical field of fireproof equipment, in particular to an electrically-driven translation type heavy fireproof door which comprises a door body, a driving mechanism and a translation mechanism. The translation mechanism comprises a translation base and a nut sleeve, a mounting hole and a guide hole which penetrate through the two sides of the translation base are formed in the translation base, the nut sleeve and the lead screw form a thread transmission pair, the nut sleeve is rotatably mounted in the mounting hole, the guide rod is slidably connected in the guide hole, and a synchronous assembly is arranged in the translation base; when the door body moves to the tail end of the stroke, the circumferential constraint of the synchronous assembly on the nut sleeve is automatically relieved, so that the nut sleeve can freely rotate relative to the translation base. Therefore, the motor and the transmission system do not need to overcome the huge inertia of the door body to achieve forced stopping, the instantaneous load and locked-rotor risk of the motor are remarkably reduced, and meanwhile the impact stress borne by a mechanical transmission part at the terminal is greatly relieved.

The invention discloses an automatic closing door closer which comprises a door closer body, an automatic closing device and an auxiliary closing device. The automatic closing device is connected with an output shaft on one side of the main body and comprises a mechanical locking mechanism composed of an angle cam, a sliding block and a supporting spring and a triggering mechanism composed of a swing connecting rod, an unlocking connecting rod and an electric driving mechanism with a gear motor, the output shaft is stably locked in a normally-open state, electric unlocking is achieved when fire signals are triggered, and the automatic closing device can automatically close the output shaft. And the door leaf is automatically closed by the door closer main body. The auxiliary closing device is connected with an output shaft on the other side of the main body and comprises a cam shaft with a concave part and a trigger assisting assembly composed of a roller, a piston and a pressure spring, and when the door leaf is closed to the angle smaller than the set angle, the roller falls into the concave part of the cam, and the pre-tightened spring elastic force is released to generate auxiliary torque. According to the fireproof door, the functions of normally-open locking and releasing and door closing tail section assisting are integrated, and the automatic closing reliability and the final leakproofness of the fireproof door in a fire disaster are remarkably improved.

The invention discloses an adaptive positioning correction method for a tunnel environment, and the method comprises the steps: preliminarily restoring the position of a mobile device to a tunnel axis through inertial navigation, and employing inherent static features (such as a cable support, a fireproof door, and a duct piece joint) in a tunnel as a reference; and the automatic correction of the SLAM accumulative error is realized by measuring the distance from the feature object. And meanwhile, an intelligent filtering algorithm is adopted to effectively suppress dynamic object interference, so that the positioning precision and the system robustness are remarkably improved, and reliable technical support is provided for intelligent operation and maintenance of the cable tunnel.

The invention discloses handheld steel fireproof door fireproof performance in-situ nondestructive testing equipment and a use method, and belongs to the technical field of fireproof door fireproof performance determination. In order to solve the problems that an existing method lacks an effective in-situ nondestructive testing means and the actual fire resistance of a fireproof door in use cannot be accurately judged, handheld in-situ nondestructive testing equipment for the fire resistance of the steel fireproof door is designed, during testing, electric suction cups on the two sides of the equipment are adsorbed to the fireproof door, and a laser sensor rapidly measures the thickness of the fireproof door; the ultrasonic eddy-current sensor is used for measuring fireproof door steel plate thickness; the X-ray sensor is used for measuring the compactness of the fireproof door filling material by using the X-ray propagation time; and comparing the measured data with a qualified fireproof door to obtain the fireproof performance of the measured fireproof door. Compared with the original fireproof door sampling detection equipment and method, the equipment and method can realize portable in-situ nondestructive detection, quickly judge the performance of the fireproof door, prevent inferior products from entering the market and protect the property and life safety of people.

The invention relates to an intelligent fire exit door state monitoring method, system and device, and the method comprises the steps: collecting magnetic field distribution data through a magnetic field induction array disposed on the contact surface of a door body and a door frame of a fire exit door, carrying out the change analysis, and obtaining the opening and closing information of the door body; performing signal filtering and feature extraction on the door body opening and closing information to generate door body state information; the door body state information is uploaded to a cloud analysis platform, safety analysis is carried out in combination with fire exit door data, and a door body evaluation conclusion is generated; and generating equipment regulation and control parameters according to the door body evaluation conclusion, and performing parameter optimization adjustment on the magnetic field induction array to obtain optimized monitoring parameters. According to the method, a complete closed-loop system from data acquisition, local processing, cloud analysis to parameter optimization can be constructed, and the accuracy, reliability and operation and maintenance efficiency of state monitoring of the intelligent fire exit door are comprehensively improved.

The application discloses an equipment room fireproof door with ventilation and smoke prevention performance, and aims to provide a reasonable structure, fire resistance, good smoke prevention performance and ventilation and heat dissipation effect, which comprises a door frame, a door leaf and a hinge, a shutter device is arranged on the middle lower part of the door leaf, the shutter device comprises a shutter frame, a plurality of movable blades which are sequentially and movably connected on the shutter frame, a linkage assembly which is connected on the movable blades, a heat-sensitive assembly which is arranged on the shutter frame and used for controlling the operation of the linkage assembly, and an elastic member which is used for providing a restoring force for the linkage assembly, one end of the elastic member is fixed on the shutter frame, and the other end is connected with the linkage assembly.

This invention discloses a folding swing fire door, including a door frame. An installation groove is formed on the top inner side of the door frame, and an automatic pushing structure for automatic closing in case of fire is provided within the installation groove. Guide rail grooves are formed on both sides of the installation groove, and several sliding casters are installed within the guide rail grooves. This folding swing fire door combines the space-saving and flexible opening and closing characteristics of traditional folding doors. In the event of a fire, the generated high temperature is transferred to the automatic pushing structure through the main heat strip, triggering it to push the door open. With the cooperation of the sliding casters and guide rail grooves, the folding door is automatically pushed and closed to isolate the fire from the door frame, eliminating the need for manual risk-taking to close it.

The utility model relates to fire engineering technical field especially fire engineering is with preventing deformation's heat -proof fire door, including door frame, still including door shell and door lock component, door frame one side fixedly connected with door shaft, door frame one side fixedly connected with door shaft, the material that this device adopts through door shell is steel sheet to improve the strength of door, prevent deformation, the material that fills the layer adopts is magnesium oxide to improve the heat -proof of door, through being provided with first fire -retardant expansion seal and second fire -retardant expansion seal on door frame and door shell, thereby the door gap is sealed, improves the leakproofness, can effectively block the flue gas, through first spring drive movable block in the inside slide of guide block, movable block drive toothed plate removal, toothed plate drive gear rotation, gear drive first rotation axis rotation, first rotation axis drive second connecting rod rotation, second connecting rod drive first connecting rod in the inside rotation of fixed block, thereby the door shell is automatically closed, prevents the fire, flue gas spreads.

This utility model provides a fire door with ventilation function, including a door leaf, a door frame, and a ground layer. The door frame stands on the ground layer, and the door leaf is embedded in the door frame and connected to the door frame by hinges. The lower half of the door leaf is embedded with a fire-resistant device, which includes a ventilation blade frame, ventilation blades, fire-resistant blade shafts, fire-resistant blades, a temperature sensor, and a transmission mechanism. Fire-resistant blades are arranged within the ventilation blade frame by several equidistantly spaced fire-resistant blade shafts. The temperature sensor and transmission mechanism are located on one side of the ventilation blade frame. The temperature sensor is communicatively connected to the transmission mechanism, which drives several fire-resistant blade shafts to rotate synchronously, thereby opening and closing the fire-resistant blades to achieve rapid switching between normal ventilation and fire isolation functions. This utility model aims to solve the problems of poor ventilation performance, easily damaged ventilation devices, and poor fire resistance and sealing of traditional fire doors, thereby optimizing ventilation performance, improving the durability of ventilation devices, and enhancing fire resistance.

Door drive (1), in particular a door closer, with hydraulic damping, in particular for a fire door, wherein the door drive (1) comprises: a housing (3) with a housing interior in which a hydraulic fluid is provided, a functional element (7, 9) which is inserted into an opening (5) of the housing (3), and a sealing element (11) which seals the housing (3) to the outside in the area of ​​the opening (5), wherein the sealing element (11) consists at least partially of a material which has a defined melting temperature, characterized in that that the sealing element (11) is a sealing ring, that the functional element (7) comprises a circumferential outer groove (13) which receives the sealing element (11), and that the outer groove (13) of the functional element (7) has an outwardly directed support surface (15) with at least one recess (17) which acts as a flow contour for the hydraulic fluid.

The utility model relates to the technical field of fireproof door production, in particular to a corner polishing device for fireproof door production, which comprises a base, a groove is arranged at the front end of the base, a base is fixedly connected to the upper end of the base, a clamping mechanism is slidably connected to the inner wall of the base, and the outer surface of the clamping mechanism is movably connected with the base. Two supporting columns are fixedly connected to the upper end of the base, and adjusting mechanisms are fixedly connected to the upper ends of the two supporting columns. The corner polishing device for fireproof door production can adapt to fireproof doors of different sizes and shapes, the universality and practicability of equipment are improved, it can be guaranteed that the positions of the fireproof doors are stable in the polishing process, and therefore the polishing precision and the corner processing flatness are improved, hand holding is not needed, and the production efficiency is improved. And the working intensity of a user is reduced.

The utility model provides a belt protection fireproof door, and relates to the technical field of fireproof doors, the belt protection fireproof door comprises a material passing device, a gate and an anti-sticking device, the gate is installed on the surface of the material passing device, the anti-sticking device is arranged on the surface of the material passing device, the anti-sticking device comprises a water storage tank, the water storage tank is arranged on the surface of the material passing device, and the anti-sticking device is arranged on the surface of the material passing device. A water inlet pipe is fixedly connected to one side of the material passing device and communicated with the water storage tank, a water adding hopper is fixedly connected to the surface of the water inlet pipe and communicated with the water inlet pipe, and a supporting frame is fixedly connected to the surface of the material passing device and fixedly connected with the surface of the water inlet pipe. According to the anti-sticking device, due to the fact that the anti-sticking device is arranged, the situation that materials of the belt adhere to the gate can be reduced, the situation that the fireproof door is stuck is reduced, the using convenience of the fireproof door is improved, and the attractiveness of the gate is improved.

This utility model discloses a deformation-resistant steel fire door, comprising a steel fire door body, a front panel, a rear panel, and a heat insulation shell. The front and rear panels are arranged in parallel. A positioning groove is provided on the inner side of the rear panel. The heat insulation shell is disposed inside the positioning groove, and its opening is bent outward to form a flange extending into a buffer space and fitted with a sealing frame. The front panel has multiple countersunk holes, and screw holes are provided on the flange and the rear panel directly opposite the countersunk holes. Buffer bolts for fixing the front and rear panels together are threaded into the corresponding screw holes and countersunk holes. This utility model has a simple structure. The steel fire door consists of a front panel, a rear panel, and a heat insulation shell. The heat insulation shell reduces heat transfer, greatly reducing the probability of the front panel deforming due to high temperatures. Furthermore, the front and rear panels are replaceable; if any one panel deforms, only the damaged panel can be replaced, avoiding the need for complete replacement and reducing costs.

The utility model discloses an automatic turn-over processing device for fireproof door plates, which relates to the technical field of fireproof door plate processing and comprises a rotary turn-over machine, a master controller is fixedly mounted at the top end of one side of the front surface of the rotary turn-over machine, and a rotary adjusting disc is rotatably connected to the side surface of the rotary turn-over machine. And the top end of one side of the rotary adjusting disc is fixedly connected with a connecting shaft. By arranging the interior of a plate buckle limiting groove, a fireproof door plate needing to be machined is directly inserted into the plate buckle limiting groove, the position of a telescopic connecting column in a fixed connecting disc is adjusted by adjusting an auxiliary handle according to the actual length of the fireproof door plate, then the position of a movable connecting disc is adjusted, and length installation of the fireproof door plate can be better adapted; and the main controller directly controls the rotating angle of the rotating adjusting disc, the rotating angle of the fixed connecting disc and the rotating angle of the movable connecting disc can be directly adjusted, the overturning operation of the fireproof door plate is achieved, and the overturning flexibility of the device is further improved.

The utility model relates to the technical field of fireproof door processing, and discloses a cold-pressing gluing device for a wooden heat-insulation fireproof door, which is characterized in that a groove matched with a fireproof door frame in size is formed in the upper surface of a lower die, so that the fireproof door frame can be positioned in the cold-pressing process, and the fireproof door frame is prevented from being damaged. Therefore, the shape and the size of the fireproof door frame filled with the flame-retardant material are prevented from being changed in the cold pressing process. In addition, through holes are formed in the bottoms of the grooves, flame-retardant materials are injected into the filling cavity of the fireproof door through the through holes, and the situation that air is mixed into the flame-retardant materials to form gaps, and the filling effect is affected can be avoided. And meanwhile, flame-retardant materials can be injected into the multiple fireproof door filling cavities through the through holes at the same time, so that the flame-retardant materials in the fireproof door filling cavities can be uniformly diffused, the filling uniformity of the flame-retardant materials is ensured, and the flame-retardant materials are prevented from sputtering. The two steps of filling and cold pressing can be continuously carried out, equipment does not need to be replaced, and therefore the production quality and efficiency are improved.

This invention relates to the field of fire door monitoring technology, and discloses a sensor-based fire door status monitoring and early warning system and method. The system includes a target sensor, an execution parameter generation module, an execution module, a protection module, a sensor status monitoring module, an internal information acquisition module for the protection module, an environmental information acquisition module, and an analysis module. The system analyzes external environmental information data, internal information data, and status information data from the protection module to obtain protection parameters, ensuring effective protection of the target sensor. Based on the analysis of the internal information data of the protection module, a reliability level is obtained. Then, based on the reliability level analysis, the working strategy of the execution module is determined. The system can automatically switch the execution module to manual adjustment mode when the reliability level of the target sensor is low due to fire damage, avoiding inappropriate or even dangerous actions by the execution module caused by erroneous data collected by the target sensor.

The utility model discloses a steel-wood passive type low-energy-consumption fireproof door, and relates to the field of steel-wood fireproof doors. A door body of a traditional steel-wood fireproof door is mostly of an integrally-formed steel structure, steel is high in heat conductivity, heat is easily conducted through the door body, and a large amount of energy in a building is lost. The thermal insulation door comprises a steel frame and a door leaf, clamping edges are arranged on the periphery of the door leaf, the steel frame comprises a rear frame and a front frame, thermal insulation partition materials are arranged between adjacent positions of the rear frame and the front frame, the clamping edges comprise a rear clamping edge and a front clamping edge, and thermal insulation partition materials are arranged between adjacent positions of the rear clamping edge and the front clamping edge. A waterproof breathable film is arranged on the outer side of the heat preservation layer, and a heat insulation base plate and a waterproof vapor-proof film are arranged on the inner side of the steel frame and adjacent wall surfaces. The heat insulation partition materials are arranged between the steel frame and the clamping edges, a heat insulation bridge structure is formed, the heat conduction path through the steel frame and the clamping edges is cut off, the heat insulation capacity of the steel-wood fireproof door is improved, indoor and outdoor heat exchange is reduced, the indoor temperature can be kept stable, and building energy consumption is reduced.

The utility model discloses a heat-insulation expansion high-temperature-resistant fireproof door frame which comprises a door frame body, polyurethane heat-insulation strips, right-angle fixing pieces and arc-shaped heat conduction strips, the door frame body is composed of a first frame and a second frame, and a first heat-insulation filling strip, a second heat-insulation filling strip and a third heat-insulation filling strip are arranged in the first frame and the second frame. The right-angle fixing pieces are welded to the first frame and the second frame, and the arc-shaped heat conduction strips are fixedly connected to the surface of the first frame. The width of the first frame is larger than that of the second frame, the second frame serves as a fire receiving face of the door frame, heat absorbed by the door frame can be reduced, heat conducted by the second frame is dissipated through the first frame and the aluminum strips, the heat dissipation capacity of the door frame is improved, and the heat insulation capacity is good. The first heat-insulation filling strip, the second heat-insulation filling strip and the third heat-insulation filling strip are separated by the polyurethane heat-insulation strips, so that a plurality of heat-insulation barriers can be formed, heat conduction is blocked, and the temperature of the door frame is reduced.

This invention discloses a welding positioning fixture for fire door frames, belonging to the technical field of fire door processing equipment. The fire door frame welding positioning fixture includes a vertical plate, an inner support mechanism, an outer push mechanism, a dust removal mechanism, a tray, and a second motor. The inner support mechanism uses a first top block and a second top block to press the inner sides of the two vertical frames together, with the first top block providing support at the internal corner where the horizontal and vertical frames connect. The outer push mechanism uses an outer push component that engages with the grooves in the vertical frames to push and position them from the outside. The dust removal mechanism uses a hollow pressure plate that can be inserted into the upper groove of the horizontal frame to press down on the horizontal frame and extract and filter welding fumes. The second motor drives the vertical plate to rotate relative to the tray, cooperating with the welding groove to allow continued welding on the other side of the door frame connection. This fixture can improve the welding clamping stability of the door frame, reduce the inward shrinkage deformation of the corners after welding, and improve the continuity of double-sided welding and the effect of welding fume treatment.

This application provides a fire door passage structure for robotic pipe gallery inspection, including a door frame and a door leaf. One end of the door leaf is hinged, and the upper end of the door leaf is provided with an inspection window for the inspection robot to pass through. An openable inspection door is provided at the inspection window. An avoidance groove is provided on the door frame near the inspection door. The inspection robot's overhead rail passes through the avoidance groove. Movable first and second sealing blocks are respectively provided on both sides of the inspection robot's overhead rail at the avoidance groove. The first and second sealing blocks are close to the inspection robot's overhead rail to close the gap between the inspection robot's overhead rail and the avoidance groove, thus solving the problem of the robot passing through the fire door during pipe gallery inspection.

The utility model discloses a marine fireproof door convenient to maintain and overhaul, which comprises a door frame and a fireproof door body arranged in the door frame, and further comprises a fireproof hinge arranged on the rear side of the fireproof door body, a door lock arranged at the front end of the fireproof door body, and a fireproof rubber strip arranged on the outer side of the fireproof door body, a first supporting frame is arranged on the upper side of the fireproof door body, and a limiting assembly is arranged on the rear side of the first supporting frame. According to the marine fireproof door convenient to maintain and overhaul, ventilation of a fire fighting access in daily use is conveniently guaranteed in the process, air circulation in the fire fighting access can still be guaranteed when the device is free of fire and closed, the using effect of the device is improved, meanwhile, after the device is used, the device is convenient to disassemble, assemble and maintain, and the service life of the device is prolonged. And after the device is damaged, maintenance personnel can disassemble, replace and overhaul the device easily, the maintenance and overhaul efficiency of the device is improved, and the better using effect is achieved.

The application discloses a fireproof door welding platform and a welding process thereof, and relates to the technical field of welding equipment. The fireproof door welding platform comprises a welding platform, a clamping mechanism fixedly connected to the bottom of the welding platform, and a cooling mechanism fixedly connected to the bottom of the welding platform. The clamping mechanism comprises L-shaped fixed clamps, four L-shaped fixed clamps are arranged on the bottom of the welding platform, and the four L-shaped fixed clamps are arranged on the bottom of the welding platform. The fireproof door welding platform and the welding process thereof are characterized in that, after welding is completed, the L-shaped fixed clamps are pulled out to the outside, so that the four edges of the fireproof door frame are pushed by the pushing force of the spring pushing clamping plates, the fireproof door frame is pushed, and then the welding position of the fireproof door frame is pulled, so that the welding position is convenient to detect, the situation that the welding is not firm is found, the fireproof door frame can be quickly fixed again, and the welding efficiency is improved.

The fireproof invisible door mounting structure comprises a fireproof door leaf, a fireproof door frame and a wall body, the fireproof door frame is arranged outside the wall body, the fireproof door frame and the wall body are connected through a first connecting assembly and a second connecting assembly, and the fireproof door leaf comprises an aluminum alloy profile fixing frame coated with an aluminum honeycomb veneer; first edge sealing frames are arranged on the left side, the right side and the upper side of the aluminum alloy profile fixing frame, a second edge sealing frame is arranged on the lower side of the aluminum alloy profile fixing frame, one end of the second connecting assembly is connected with a wall, and the other end of the second connecting assembly extends out of the fireproof door frame while being connected with the fireproof door frame and is connected with the first edge sealing frames through sealing strips. A door hinge is further arranged between the first edge sealing frame on one of the left side and the right side of the aluminum alloy profile fixing frame and the second connecting assembly so that the fireproof door leaf can be movably connected with the fireproof door frame. By means of the installation structure, the door leaf can be hidden, and meanwhile the excellent fire-resistant integrity, heat insulation and sound insulation effects are provided.

The utility model relates to the technical field of fireproof doors, in particular to a bidirectional split steel fireproof door which comprises a vertical frame used for fixing the fireproof door. A transverse frame is fixedly arranged on one side of the vertical frame and used for fixing the fireproof door, and a transverse baffle opening is fixedly formed in the bottom of the transverse frame. According to the utility model, the third fireproof expansion sealing element is adhered to the section difference position of the split seam covering plate, so that the sealing performance of the center seam position can be ensured, and the fireproof stability of the center seam position is improved; the gap position, namely the center joint position of the first door leaf and the second door leaf, is a dangerous point, the split gap covering plate covers the center joint position after the first door leaf and the second door leaf are closed, the upper edge of the split gap covering plate is just located at the gap position of the two crosspiece openings, and the safety of the dangerous point can be effectively guaranteed by adding a third fireproof expansion sealing piece on the upper edge.

The utility model discloses an anti-radiation fireproof door, and particularly relates to the technical field of fireproof doors, the anti-radiation fireproof door comprises a door frame, the inner wall of the door frame is rotatably connected with a door frame, the front side of the door frame is fixedly connected with a handle, a dismounting assembly is arranged in the door frame, an anti-collision assembly is arranged in the door frame, and the dismounting assembly comprises two worms; the two worms are arranged up and down with the center of the door frame as the symmetry point, and the outer surfaces of the left sides and the right sides of the worms are rotationally connected with the inner wall of the door frame. According to the anti-radiation fireproof door, by arranging the dismounting assembly, specifically, the mounting plate is taken down firstly, two rotating blocks are rotated anticlockwise to drive two worms to rotate in the inner wall of the door frame, when the worms rotate anticlockwise, a limiting plate can be driven to move, and when limitation on a lead plate can be relieved, the lead plate can be directly taken down to be replaced; the whole door body does not need to be replaced, the maintenance cost of the device is reduced, and waste of steel, flame-retardant materials and other resources cannot be caused due to the fact that the lead plate can be detached independently.

The utility model relates to the technical field of fireproof separators, in particular to a comprehensive pipe gallery fireproof separator which comprises a door frame, an adjusting assembly is fixedly arranged on one side of the door frame, a fireproof door body is hinged to one side of the adjusting assembly, the adjusting assembly comprises two installation bases, and positioning sleeves are fixedly connected to the front end faces of the installation bases. A rotating shaft is rotatably connected between the two positioning sleeves and comprises a mounting shaft, an upper adjusting shaft is fixedly connected to the top end of the mounting shaft, a lower adjusting shaft is fixedly connected to the bottom end of the mounting shaft, a connecting seat is fixedly connected to the middle of the mounting shaft, an obstacle crossing assembly is fixedly connected to the bottom of the mounting shaft, and a supporting column is arranged below the obstacle crossing assembly; according to the fireproof door, the problem that the fireproof door body cannot be normally opened due to the fact that the fireproof door body is clamped by falling small objects or other obstacles is effectively avoided, and potential safety hazards are reduced.

This utility model relates to the field of fire door technology and discloses a double-track furnace front fire door, including a double-track mechanism. A track-changing mechanism is provided on one side of the double-track mechanism. A main body mechanism is provided on the surface of the double-track mechanism. The track-changing mechanism includes a track-changing base plate. Two limiting blocks are fixedly installed on the upper surface of the track-changing base plate. A track-changing track is slidably arranged on the upper surface of the two limiting blocks. A track-changing motor is fixedly installed on one side of the track-changing track. A reducer is fixedly installed at the output end of the track-changing motor. A track-changing gear is fixedly installed at the output end of the reducer. A track-changing rack is fixedly installed at one end of the upper surface of the track-changing base plate. The double-track mechanism includes a first base plate, and a second base plate is fixedly installed on one side of the first base plate. In this utility model, the design of the double-track mechanism and the track-changing mechanism reduces downtime caused by track damage, improves production efficiency, and reduces production costs.

The utility model discloses a steel fireproof door convenient to observe, which relates to the technical field of fireproof doors and comprises a door frame, a window cover plate, a buffer column, a first door plate and a spring, the window cover plate is fixedly connected above the center line of the door frame, and the first door plate and a second door plate are arranged below the door frame. A window cover plate, a limiting block, explosion-proof glass, a hydraulic connecting rod, a limiting bolt and a spring are arranged above the center line of the first door plate, and a buffer column, a protective baffle and a spring are arranged below the center line of the first door plate. The acting force at the two ends can be balanced through the sleeved spring, meanwhile, the protective baffle can be moved towards the two ends, opening of the opening is achieved, and firefighters can conveniently put out flames in a blocked area.

The invention discloses an ALC internal partition wall fireproof door which comprises a door frame, an ALC fireproof door body and an observation window. A fireproof plate is movably arranged on one side of the ALC fireproof door body and detachably installed through a connecting hole. A water guide groove is formed in the fireproof plate, and a water swelling strip is embedded in the bottom of the fireproof plate; a water spraying component is movably mounted on the fireproof plate and comprises a water tank, a water pump, a water spraying plate, an atomizing nozzle and a connecting lug plate; a temperature sensor is arranged on the fireproof plate and used for triggering the water spraying component to work. Through the modular design of the detachable fireproof plate and the water spraying component, a double-layer fireproof structure is formed on the basis of a traditional ALC fireproof door, the temperature sensor triggers the atomization nozzle to conduct spraying cooling when encountering high temperature, and the water guide groove guides water flow to enable the water swelling strip to seal a gap; and the observation window is compositely fixed by fireproof glass and sealant, so that the combination of active fire prevention and passive flame retardance is realized, local replacement of damaged parts is facilitated, the fire endurance is remarkably improved, and the maintenance cost is reduced.

This invention discloses an AI vision-based method for fire door status recognition, comprising the following steps: collecting and preprocessing data to obtain standardized visual data; extracting structural visual features of the fire door; performing evidence mapping processing to convert it into structural evidence and constructing state support parameters; constructing and correcting structural constraint relationships to obtain constraint-corrected state support parameters; inputting the structural visual features into a deep random vector functional connection network and updating the state support parameters; constructing an evidence set and calculating the degree of constraint violation to obtain evidence conflict measurement results; performing reliability assessment to obtain weight parameters corresponding to each structural piece of evidence; constructing support channels respectively, and incorporating the evidence conflict measurement results for constraint suppression processing to obtain a fire door status judgment value; and outputting the fire door status result. This invention employs an AI vision-based state recognition method based on structural constraint relationships to achieve fire door status determination with high accuracy and robustness.