1156 results about "Fire door" patented technology

The invention discloses a fireproof door combination welding device, and belongs to the technical field of fireproof door welding. A welding groove is formed in the rack, and two first storage racks and two second storage racks are arranged on the upper surface of the rack. A material pushing plate is arranged below each of the two first material storage racks in a sliding mode, and a material pulling plate is arranged below each of the two second material storage racks in a sliding mode. A door frame vertical rod and a door frame cross rod are stored through the symmetrical first material storage frames on the two sides and the symmetrical second material storage frames at the two ends correspondingly, and materials can be controlled to be pushed one by one through the material pushing plate and the material pulling plate sliding below and the first material forking groove and the second material forking groove formed in the material pushing plate and the material pulling plate. Through cooperative operation of the material pushing plate and the material pulling plate, the four door frame rod pieces (the vertical rods on the two sides and the transverse rods at the two ends) are accurately pushed into the welding grooves to be spliced into the fireproof door frame, then the welding assemblies are used for welding the connecting positions, full-process automatic operation of the fireproof door frame from material pushing, splicing positioning to welding forming is achieved, and the production efficiency is improved.

The utility model discloses an electric overturning poly V-belt roller machine, which is mounted at a fireproof door and comprises a mounting bracket, a main conveying frame arranged on the mounting bracket, an overturning bracket and a driving component for driving the overturning bracket to overturn around the main conveying frame, a plurality of main conveying rollers are rotationally installed on the main conveying frame, a plurality of auxiliary conveying rollers are rotationally installed on the overturning support, the main conveying frame and the overturning support are rotationally connected through the adjacent auxiliary conveying rollers, and the driving assembly is an electric push rod and is provided with a magnetic switch. After the electric push rod extends, the overturning support is overturned to the horizontal position, accurate conveying of goods is guaranteed, and after the electric push rod retracts, it is guaranteed that the fireproof door is completely closed. Compared with the prior art that a rotating shaft is driven by a motor to turn over, the turnover mechanism has the advantages that the structure is simplified, the cost is reduced, the assembly steps are simplified, and the turnover stop position is more accurate.

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 a steel fireproof door plate polishing device, which belongs to the technical field of fireproof door plate processing, and comprises a rack, rotating rollers uniformly and rotatably mounted along the length direction of the rack, and a housing mounted at one end of the top of the rack, conveying mechanisms are arranged at two ends in the housing, and second hydraulic cylinders are symmetrically and vertically mounted on two sides of the top in the housing. A reciprocating mechanism composed of a first shaft sleeve, a first spline shaft, a reciprocating lead screw, a second sliding block, a connecting rod and a first belt wheel assembly is arranged at the end of the grinding roller, in the process that the grinding motor is used for controlling the grinding roller to rotate, the grinding roller can be controlled to reciprocate in the axial direction, and axial movement and rotation are combined; a crossed net-shaped grinding track is formed, covering is more comprehensive, surface textures are more uniform, subsequent polishing procedures are reduced, spraying or assembling requirements are directly met, in addition, the grinding roller axially moves to enable dust to be distributed more dispersedly, the dust concentration of a working area is greatly reduced in cooperation with a negative pressure dust suction mechanism, and potential safety hazards are reduced.

The invention relates to the technical field of safety control of fire exit doors, in particular to an emergency unlocking device and system of an intelligent fireproof door. The analysis subsystem outputs a fire alarm confidence coefficient value and an operation intention intensity value; the arbitration subsystem sends a blocking signal to the automatic locking control system and activates a to-be-decoupled state of the execution subsystem when the intensity of the operation intention exceeds a threshold value; the execution subsystem synchronously adjusts a mechanical transmission stroke parameter and an electromagnetic latching current parameter according to the intensity value of the operation intention; the fault-tolerant subsystem switches the mechanical locking mechanism to a geometric dead point position to release automatic control connection; and the traceability subsystem records the operation data and maintains storage when the power supply is interrupted. According to the invention, a closed-loop control chain from signal sensing to physical decoupling is formed, the problem of authority conflict of automatic locking logic blocking manual operation is solved, and the timeliness and reliability of emergency unlocking are improved.

The invention provides a remote monitoring method and system based on a fireproof door monitoring module, and relates to the technical field of fireproof safety monitoring, and the method comprises the steps: constructing a fireproof function simulation model of a building; m fireproof door monitoring modules are pre-deployed; after M pieces of real-time state information of the M fireproof door monitoring modules are collected, the function availability of the fireproof door is judged; performing dynamic evacuation path fitting after spatial mapping of the fault fireproof door in the fireproof function simulation model; according to the fireproof influence degree, operation and maintenance priority ranking of the faulted fireproof door is carried out, and a hierarchical operation and maintenance priority sequence is output. The technical problem that the operation and maintenance management efficiency of the fireproof door is low due to the fact that the influence on the whole cannot be evaluated in time when a single fireproof door fails in the prior art is solved, collective availability judgment of the fireproof door combination is performed by monitoring the state of each fireproof door in real time and based on fire escape path fitting, and the operation and maintenance efficiency of the fireproof door combination is improved. And the operation and maintenance management efficiency of fireproof door monitoring is improved.

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 a steel-wood composite heat insulation fireproof door, and relates to the technical field of fireproof doors. The steel-wood composite heat insulation fireproof door comprises a mounting frame structure, a fireproof door leaf structure is hinged to the inner side of the mounting frame structure, a protective observation window structure is arranged on the inner side of the fireproof door leaf structure, and a locking structure is arranged on the front side of the mounting frame structure. Through the arrangement of the fireproof door leaf structure and the combined design of the fireproof filling ceramsite layer, the fireproof perlite plate layer, the rock wool layer, the heat insulation cotton layer and the flame-retardant sealing layer in the fireproof door leaf structure, the strength and stability of the door body are enhanced, the heat insulation effect is remarkably improved, the fireproof filling ceramsite layer and the fireproof perlite plate layer serve as inner layer materials, and the fireproof filling ceramsite layer and the fireproof perlite plate layer serve as outer layer materials; the door body has excellent fire resistance and heat insulation performance, invasion of high-temperature flames and heat can be effectively blocked, the rock wool layer and the heat insulation cotton layer serve as middle layer materials, the heat insulation effect of the door body is further improved, and heat transfer is reduced.

The present application relates to the field of door core material preparation, and particularly relates to a heat-insulating and fireproof door core material for security doors and a preparation method thereof, comprising a protective layer, a heat-insulating layer and a core part, wherein the core part comprises a plurality of springs arranged at equal intervals and fixed plates arranged at both ends of the springs; the heat-insulating layer is arranged outside the fixed plates; and the protective layer is bonded to the outside of the heat-insulating layer and is a foamed aluminum plate, which is prepared as follows: S1, cutting the fixed plates and then welding spring fixing bases and fixing buckles; S2, arranging and fixing the springs; S3, weighing the component materials of the heat-insulating layer, adding water and mixing uniformly; S4, based on a core material preparation system, sequentially completing pouring, jarring, smoothing and heat-insulating drying of the two heat-insulating layers after setting; S5, preliminarily determining whether the preparation of the heat-insulating layer meets preset standards according to the measured compressive strength; and S6, bonding the protective layer. On the basis of ensuring the performance of the core material, the present application can also be applied to the door core of security doors with different thicknesses.

The utility model discloses an A60 fireproof door for a marine ship, which comprises a left door leaf and a right door leaf which are respectively arranged on a door frame through hinges. The door frame, the left door leaf and the right door leaf are each of a structure formed by splicing a plurality of plates. The door frame, the left door leaf and the right door leaf are all filled with fireproof cotton, and fireproof rubber strips and JC rubber strips are additionally arranged. The fireproof door is applied to objects such as marine transportation energy storage containers. According to the utility model, the fireproof door can be used in severe working conditions on the sea through typical marine transportation parts; the fireproof door steel plate frame is filled with fireproof cotton to ensure that the fireproof grade is met; the door slot gap is reasonable, the fireproof door can be opened even if the fireproof door deforms while the airtightness is met, flame retardance and heat resistance are effectively achieved, and smoke is prevented from overflowing; the bottom end of the door lock is changed into a crescent lock head and a matched lock seat from a bolt type structure, so that the situation that the door is difficult to open due to deformation is further reinforced.

The invention relates to the technical field of fire alarm, in particular to an intelligent fireproof door trigger alarm system and method, and the method comprises the steps: taking a fireproof door as a configuration unit according to a sensor disposed on the fireproof door, and obtaining the early warning data of each configuration unit; taking the early warning data as a decision basis, performing event triggering rule extraction on the early warning data on each configuration unit in a fuzzy theory mode, and identifying an event set at corresponding time during triggering; sorting according to the triggering time of each data in the event set, and extracting a state tag and an event influence range of each configuration unit according to the event duration of each sorting to form a range simulation diagram; and according to the position of each configuration unit in the range simulation diagram, the state of the configuration unit is updated according to the difference of the early warning data at the two sides of the configuration unit, an early warning path is formed by the updated configuration unit, and an early warning strategy corresponding to the early warning path is set. The efficiency and accuracy of fire early warning processing are realized.

The invention relates to a fire door remote debugging system and debugging method based on WiFi networking, and belongs to the technical field of fire door system debugging, the debugging system comprises a fire door system, a server and a client, the fire door system is connected with a network through a USB-WiFi module and comprises a fire door monitor, a fire door electric door closer and a fire door electromagnetic releaser; the server comprises a communication service module and a remote debugging service module; the client comprises a remote debugging platform and a mobile phone APP. The debugging method comprises an on-line debugging mode and an off-line debugging mode: in the on-line mode, the monitor communicates with the server through a TCP / IP protocol to realize remote parameter modification, state query and fault diagnosis; and in the off-line mode, the WiFi module is converted into a hotspot, and the mobile phone APP is directly connected and completes configuration issuing and debugging.

The invention relates to the technical field of fireproof doors, and discloses an intelligent monitoring device and method for a fireproof door and a fireproof door sequencer. According to the intelligent monitoring device and method for the fireproof door and the fireproof door sequencer, high-precision monitoring of the spatial attitude of a door leaf is achieved through a nine-axis IMU sensor, an encoder and a six-dimensional force sensor are combined in the sequencer, and a multi-dimensional sensing system is constructed; on the basis of a door leaf-sequencer coupling dynamics model and an LSTM life prediction algorithm, mechanical faults can be warned in advance; through a three-level early warning mechanism and LoRa emergency broadcast, a door closing strategy is dynamically adjusted in a fire disaster, the effectiveness of an escape channel is improved, the problems of single perception, rough diagnosis and linkage delay of a traditional system are solved, and the safety of a fireproof door is 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 present disclosure relates to a push rod lock for a fire door and a control method thereof. The push rod lock comprises: a housing; a lock tongue; a toggle plate; a push rod; an electromagnetic telescopic assembly having a sliding pressure block that can be extended or retracted by electromagnetic control; a lock latch rotating assembly, the lock latch rotating assembly being used to unlock the door by a key; a first sensing element corresponding to the rotating block; a second sensing element corresponding to the lock tongue; a third sensing element corresponding to the push rod; a verification device; a prompting device; a controller, the input end of which is respectively connected to the first sensing element, the second sensing element, the third sensing element and the verification device signal, and the output end is respectively connected to the electromagnetic telescopic assembly and the prompting device signal. The control method is applied to the above-mentioned push rod lock. The present disclosure can realize the management of personnel entry and exit, and has multiple status detection and prompting functions, which can meet the usage needs of various types of users, and at the same time has the advantages of low energy consumption, low heat generation, long service life and high reliability.

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 present disclosure provides a fire door lock mechanism. A handlebar is coupled to one end of an actuator whose the other end is connected with a push rod. A lock bolt is rotatably mounted in a lock cover mount which accommodates a glide mount used to drive the push rod to move horizontally. When the actuator receives a depression force from the handlebar, the actuator is driven to rotate and induces the push rod to move horizontally. By the movement from the push rod, the lock bolt is driven to rotate to engage or disengage the lock mechanism. A partition and a fire piece are coupled to the glide mount. The fire piece melts at a high temperature during a fire, making the partition moved by a force from an elastic member connected thereto and cause the lock bolt to be engaged with the partition and maintained in a locked state.

The invention relates to the technical field of logistics equipment, in particular to a telescopic belt conveyor with a compact structure, and aims to solve the problems that in the related technology, due to the fact that a motor is matched with a two-stage transmission driving system of a chain wheel and a chain, the size and height of equipment are increased, the overall compactness is limited, and when a multi-layer conveying line body penetrates through a fire door opening, the equipment is not damaged. And the lower-layer line body is difficult to reach the required elevation. According to the telescopic belt conveyor with the compact structure, the electric roller is adopted to directly drive the first-stage transmission system of the conveying belt, and the motor is matched with the transmission structure of the synchronous belt wheel set to drive the telescopic frame to stretch out and draw back, so that the whole structure of equipment is compact, and the telescopic process is more stable. The technical problems that due to the fact that an existing telescopic belt conveyor is limited by a two-stage transmission driving system in which a motor is matched with a chain wheel and a chain, the size and height of equipment are increased, the overall compactness is limited, and when a multi-layer conveying line body penetrates through a fire-fighting door opening, the lower-layer line body is difficult to reach the needed elevation are solved.

The utility model relates to the technical field of detection furnaces, in particular to a fireproof door detection furnace which not only facilitates feeding and discharging of a fireproof door and prevents the fireproof door from being difficult to discharge after deformation, but also performs dot-matrix detection on fire resistance of the fireproof door and can test weak positions of the fireproof door. Comprising a detection furnace; the device further comprises a detection mechanism, a moving mechanism, an incineration mechanism and a smoke exhaust mechanism, the detection mechanism is installed on the detection furnace and conducts dot-matrix detection on the fire resistance of the fireproof door, the moving mechanism is installed on the detection furnace and facilitates feeding and discharging of the fireproof door, and the incineration mechanism is installed on the detection furnace and conducts combustion on the fireproof door. The smoke discharging mechanism is installed on the incineration mechanism and pumps out smoke after detection is completed.

The utility model discloses a roadway fireproof door for a coal mine, which comprises a door frame and a door plate, the door plate is hinged on the outer wall of the door frame, a fireproof mechanism for preventing fire from spreading is arranged in the door frame, and a protection component for protecting the fireproof mechanism is arranged on the outer wall of the door frame. During use, the fireproof mechanism is installed on the door frame, when a fire occurs in a roadway, the fireproof mechanism can detect the temperature in the roadway, and when the temperature is high, the fireproof mechanism is automatically started and sprays water, so that the fire in the roadway is slowed down, meanwhile, the sprayed water can cool the door frame, and the service life of the door frame is prolonged; and by arranging the protection assembly, when the door frame and the fireproof mechanism are installed in the roadway, the humid environment in the roadway can affect the service life of the fireproof mechanism, at the moment, the protection assembly can prevent the fireproof mechanism from making direct contact with moisture, and the service life of the fireproof mechanism is prolonged.

This invention relates to the field of fire door technology, specifically a smoke-blocking fire door, including a fire door frame, a fire door body mounted on the fire door frame via hinges, a door closer connected to the top of the fire door frame at the top, a handle mounted on the fire door body, and a smoke-blocking device mounted on the fire door body. The smoke-blocking device comprises a housing, a shaking device, a plate, a foam bottle, a nitrogen cylinder, pipes, a connector, and a metal tube. This invention injects foam between the fire door frame and the fire door body. The foam from the foam bottle is injected into the space between the fire door body and the fire door frame through the metal tube. The foam expands upon contact with air, filling and sealing the space between the fire door body and the fire door frame, preventing smoke from a fire from spreading upwards through the stairwell.

The utility model discloses a fireproof and smoke-proof safety door fireproof test device, comprising a fireproof detection furnace, the fireproof detection furnace comprises a combustion furnace, a sealing plate and a mounting hole, the sealing plate is movably connected to the side edge of the combustion furnace, and the mounting hole is arranged in the middle of the sealing plate; the anti-damage assembly comprises four supporting columns, first transverse rods, second transverse rods, an electric push rod, hoops and bolts, one supporting column is hinged to the side edge of the sealing plate, the first transverse rods and the second transverse rods are welded between the supporting columns, the bolts are connected between the two second transverse rods in an inserted mode, the electric push rod is fixed to one ends of the bolts, and the hoops are fixed to the other ends of the electric push rod. And the hoop sleeves the fixed end of the electric push rod. The utility model relates to a fireproof door, and aims to solve the problems that an existing back fire thermocouple is adhered to the back surface of a test door body, on one hand, the viscosity is influenced and the back fire thermocouple falls off after combustion for a period of time, and on the other hand, once a fireproof door is burnt through, flames and high-temperature gas directly act on the thermocouple and a cable thereof and the performance of the thermocouple is damaged.

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 utility model relates to a stainless steel glass fireproof door which comprises a door frame, a fireproof door body and a dust cleaning assembly, and the fireproof door body comprises a stainless steel door frame rotationally installed on the door frame and fireproof tempered glass installed on the stainless steel door frame. The fireproof tempered glass comprises a first glass layer, a fireproof heat insulation layer arranged on one side of the first glass layer and a second glass layer arranged on one side of the fireproof heat insulation layer, the fireproof heat insulation layer is specifically made of glass wool, and the dust cleaning assembly comprises a lifting structure arranged in the stainless steel door frame and a dust cleaning structure arranged on the front side of the fireproof tempered glass. A lifting motor drives a threaded rod to rotate, the threaded rod drives a threaded ring to move, the threaded ring drives a threaded block to move, the threaded block drives a dust cleaning plate to move, the dust cleaning plate drives a dust cleaning pad to ascend and descend, the dust cleaning pad cleans dust on the surface of fireproof tempered glass, a user does not need to conduct dust cleaning work repeatedly in a time-consuming and labor-consuming mode, and the working cost is reduced; the practicability is improved.

The embodiment of the invention discloses a fireproof boundary monitoring method based on state discrimination, and the method comprises the steps: obtaining the static state image information of a fireproof door, and obtaining the fireproof door state re-checking information obtained by carrying out the re-checking comparison processing of the static state image information of the fireproof door through an image analysis processor; a fireproof door pre-adjusting instruction is generated according to the fireproof door state re-checking information; identifying whether the fireproof door pre-adjusting instruction accords with a leakproofness level corresponding to fireproof door current leakproofness evaluation information pre-stored in a fireproof boundary information memory to obtain a corresponding identification result; obtaining a fireproof door airtight control strategy corresponding to the fireproof door state rechecking information; and generating a corresponding regulation and control instruction and sending the regulation and control instruction to the fireproof door remote controller and the fireproof door leakproofness regulator so as to regulate and control the fireproof door. According to the method, the static and dynamic image evolution process of the fireproof door can be analyzed in real time, the opening and closing state of the door can be effectively identified, and the state change of the fireproof door can be accurately captured to realize real-time monitoring and early warning.

The present invention discloses a sealing structure for a highly flame-retardant fireproof door, which comprises: a door frame frame, a door panel is rotatably provided on one side of which, a connecting room panel is fixed on the outer side surface of the door panel, a sealing connection structure is provided in parallel on one side of the door frame frame, and a plurality of modulation components are further provided on the door frame frame, and the modulation components are in contact with the sealing connection mechanism.

The invention belongs to the field of steel fireproof door machining, and particularly relates to a machining device and method for a steel fireproof door. A machining device for a steel fireproof door comprises a supporting and positioning frame and the like. The side face positioning mechanisms are arranged on the left portion and the right portion of the supporting and positioning frame, the welding mechanisms are arranged above the left portion and the right portion of the supporting and positioning frame, when the door frame is welded, the supporting and positioning frame limits the front face, the rear face, the left face and the right face of the frame, and the side face positioning mechanisms position the left face and the right face of the door frame. The movable frame moves towards the fixed frame, under the action of the first positioning seat, the front edge and the rear edge of the door frame are close to each other, meanwhile, under the cooperation of the side face positioning mechanism, all parts of the door frame can be precisely closed, the welding precision is improved, the welding labor intensity is reduced, then the door frame is welded through the welding mechanism, and the welding efficiency is improved. And after the welding mechanism finishes welding, the rotating seat and the devices on the rotating seat rotate to leave the upper part of the door frame.

The invention discloses an auxiliary device for hoisting and mounting an ultrahigh and overweight fireproof door, which relates to the technical field of hoisting and mounting of fireproof doors, and adopts the technical scheme that the auxiliary device comprises an auxiliary mechanism I for hoisting and moving the fireproof door and an auxiliary mechanism II which is arranged behind a door frame and is used for moving the fireproof door; the first auxiliary mechanism comprises an L-shaped support, a lifting clamping unit and a first electromagnetic adsorption unit. A fixing assembly is arranged on the fireproof door; the second auxiliary mechanism comprises a [-shaped frame, a sliding groove, a sliding block movably arranged in the sliding groove, a second electromagnetic adsorption unit, a fixed bottom plate and a hydraulic telescopic rod. The device has the beneficial effects that accurate positioning and stable movement of the fireproof door are achieved, the mounting precision is improved, and the problem of positioning deviation of traditional hoisting is solved. Manual adjustment is reduced through mechanical operation, efficiency is improved, and labor intensity is reduced. And the universal wheels, the balancing weights and the electromagnetic adsorption units enhance the stability and the safety.

The utility model provides a polishing device for steel fireproof door machining, and relates to the field of polishing devices.The polishing device comprises a main frame, a clamping assembly, a polishing assembly, an installation assisting assembly and an adjusting assembly, the inner side of the main frame is slidably connected with a lifting plate, the lower end of the lifting plate is connected with a second air cylinder, and the installation assisting assembly is fixed to the upper side of the lifting plate; the clamping assembly is fixed to the inner side of the main frame and located on the upper side of the mounting auxiliary assembly, the clamping assembly comprises a fixing plate, a sliding plate is slidably connected to the upper side of the fixing plate, a rotating shaft is connected to the inner side of the sliding plate, an electromagnet clamping block is connected to the inner side of the rotating shaft, and the grinding assembly is arranged on the inner side of the main frame. The grinding assembly is located on the upper side of the clamping assembly and comprises a moving plate, and meanwhile the inner side of the moving plate is slidably connected with a grinding disc. The steel fireproof door polishing device solves the problems that an existing steel fireproof door polishing device is low in polishing efficiency, inflexible in polishing angle and inconvenient to install and fix.

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.