1576results about "War-like protection" patented technology

The invention relates to the technical field of metro platform screen doors, in particular to a novel particulate matter-preventing energy-saving metro platform screen door with an adjustable tuyere, which comprises a metro platform, and a plurality of left-side perforated platform screen doors and right-side perforated platform screen doors are fixedly mounted on two sides of the metro platform respectively; a rotating mechanism is movably connected to one side of each shielding door with holes in the left side and one side of each shielding door with holes in the right side, an automatic control system is fixedly connected to one side of one shielding door with holes in the left side, and a left tunnel and a right tunnel are correspondingly arranged on one side of each shielding door with holes in the left side and one side of each shielding door with holes in the right side. The automatic control system adjusts the angle of the rotary baffle and closes the holes in the shielding doors on the two sides through a control circuit, on one hand, the filter screen can filter out coarse particles, on the other hand, the shielding doors can block fine particles such as PM2.5, and therefore dispersion of the particles in the tunnel into the platform is reduced, and in summer, due to the fact that the holes of the shielding doors are closed, the shielding doors can not be blocked. The loss of cold air in the platform into the tunnel is reduced, and energy is saved.

A doorsill-free waterproof air-tight door belongs to the related technical field of civil air defense equipment and comprises a door frame and a door leaf, the door leaf is hinged to the door frame and can be in water-tight contact with the two side edges and the top edge of the door frame in a closed state, and a door lock system is arranged on the door leaf and used for locking the door leaf on the door frame; a ground sealing assembly in linkage with the door lock system is further arranged on the door leaf, the ground sealing assembly comprises a ground sealing beam which is hinged to the door leaf and can turn over up and down relative to the door leaf, a sealing rubber strip which can deform under pressure is arranged on the bottom face of the ground sealing beam, and the ground sealing beam can make sealed contact with the door leaf and the ground at the same time. And the locking mechanism is linked with the ground sealing beam, so that the door can be quickly opened and closed, and extremely low leakage can be realized in a relatively long time. No matter at ordinary times or wartime, no threshold protruding out of the ground exists, a large number of people can pass through conveniently, a brand-new ground sealing mechanism is adopted for sealing the ground, and the threshold does not need to be moved or a door leaf does not need to be lifted.

The utility model relates to the field of civil air defense engineering, in particular to a high-sealing-performance double-leaf explosion-proof door which comprises a frame body, a first door leaf and a second door leaf, the first door leaf and the second door leaf are both rotationally connected with the frame body, a first containing groove is formed in one end of the first door leaf, and a second containing groove is formed in one end of the second door leaf. After the first door leaf and the second door leaf are both rotationally closed, the first containing groove communicates with the second containing groove, a first elastic bag is arranged in the first containing groove, a second elastic bag is arranged in the second containing groove, and the first elastic bag and the second elastic bag both communicate with a water supply assembly. The first elastic bag and the second elastic bag abut against each other after being filled with water. The door has the following effect that the sealing performance of the first door leaf and the second door leaf after closing can be improved.

The utility model discloses a bank branch security environment monitoring device, the structure of which includes a fixed door, a door frame, a monitoring machine, and a security door. The fixed door is fixedly installed in the door frame frame, and two security doors are symmetrically distributed. The security door includes a rotating shaft, a connecting strip, a shaking body, a handle, a built-in grid, and a security glass. The rotation and return of the rotating shaft will drive the connecting strip to stretch and retract. When the connecting part is pulled, it is in a straight state. When the connecting part is rotated, it is in a bendable loose state. The unfixed parts connected to the two sides of the shaking body will shake with the inertia of the connecting strip. The pulling body inside the built-in grid will pull the toughness strip to pull the rotating shaft. The elastic block will drive the reflective layer to move while the solid body bears the inertial force. The reflective layer is distributed inside the built-in grid. When light is irradiated on the surface of the reflective layer, it will be refracted to the vicinity. It will continuously block the peripheral vision and prevent the peripheral from being peeped for a long time.

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.

According to the aluminum alloy door and window with the anti-theft function in the field of doors and windows, through the built-in anti-theft net arranged in the window frame, an independent anti-theft net does not need to be installed on the outer side of the aluminum alloy window, and through the pair of anti-theft ropes arranged in a bilateral symmetry mode and the first winding mechanism, the anti-theft effect is achieved; a pair of anti-theft ropes which are arranged in a bilateral symmetry mode is tensioned to form a vertical grid-shaped anti-theft net, rapid erection of the anti-theft net is achieved, the anti-theft ropes are rapidly pulled and stored through a storage mechanism comprising a traction ring, a traction rope and a second winding mechanism, rapid storage of the anti-theft net is achieved, and the anti-theft net is convenient to use. The problem that a traditional detachable anti-theft net is tedious in operation is solved, after the anti-theft rope is stored, the aluminum alloy window has a large viewing view field, and practicability and attractiveness are achieved; in addition, by arranging a human body proximity sensor, a distance sensor, a window sash driving mechanism and an anti-theft system, different anti-theft operations are automatically adopted according to different scenes, and multi-stage anti-theft is achieved.

The utility model belongs to the technical field of mining industry, and discloses a waterproof and airtight door for mining, including a door frame assembly for supporting and fixing, and also including a door body assembly for locking and closing installed on the door frame assembly, wherein a sealing assembly for multi-layer annular compression sealing is arranged on the door body assembly, and the sealing assembly and the door body assembly are pasted together; the door body assembly includes a door panel body, a hinge shaft is arranged on one side of the door panel body, a boss is arranged in the middle of the door panel body, and the boss is in the shape of a frustum. The waterproof and airtight door for mining described in the utility model has enhanced automatic centering and balancing performance and ensured uniformity of force and reliability of sealing through the arrangement of inclined meshing compression sealing; ensured tightness of sealing through the arrangement of multi-layer annular compression sealing; ensured tightness of sealing through the arrangement of multi-layer annular compression sealing; ensured reliability of locking and fixing through the arrangement of wedge-shaped locking blocks.

The utility model provides a shock-proof anti-theft door which comprises an anti-theft door body, the anti-theft door body is divided into a front plate and a rear plate, the interior of the anti-theft door body is of a hollow structure, a layer of partition plate is further arranged in the anti-theft door body, a plurality of round holes are formed in the partition plate, and the shock-proof anti-theft door further comprises a first sleeve and a second sleeve. A first damping spring and a second damping spring are installed on the outer side wall of the first sleeve and the outer side wall of the second sleeve in a surrounding mode, the end of the first damping spring is fixedly connected with the bottom edge of the first sleeve and the rear side wall of the partition plate, and a monitoring assembly is further arranged on the anti-theft door body in a penetrating mode. According to the shock absorption type anti-theft door, the first damping spring and the second damping spring are used for absorbing external impact force, it is guaranteed that the anti-theft door body is not deformed and damaged by impact, meanwhile, the influence of external wind power can be reduced, and noise generated when the anti-theft door body is impacted by wind is weakened.

The invention relates to intelligent civil air defense and flood gate equipment and system and a control method thereof. The equipment comprises a gate body and a gate leaf driving mechanism. The door body comprises a lower locking mechanism; bottom lifting type sealing structures are arranged between the bottoms of the left door leaf and the right door leaf and the lower door frame. The door leaf driving mechanism is connected with the left door leaf and the right door leaf; the system further comprises an intelligent control device, the intelligent control device comprises a sensor module, a drive control module and a remote control platform, the sensor module and the drive control module are integrated on the door body, and the sensor module comprises a door leaf opening and closing position detection sensor, a bottom lifting type sealing structure pressing state detection sensor and a water level height detection sensor. And the driving control module controls the door leaf driving mechanism and the lower locking mechanism according to a detection signal of the sensor module and an instruction of the remote control platform. By optimizing a door body sealing and locking execution structure and combining a sensing monitoring and centralized control mode, the sealing reliability and control safety of the civil air defense door under the conditions of high water level and complex water flow are improved.

The invention discloses a multifunctional novel air conditioning control panel system and a control method, and relates to the field of air conditioning control devices. According to the multifunctional novel air conditioning control panel system and the control method, the system comprises a bed main body, a sealing door, oxygen production equipment, an air treatment module and a monitoring module. According to the multifunctional novel air conditioning control panel system and the control method, the oxygen concentration in the bed body main body is controlled by the air processing module, the oxygen concentration in the bed body main body is accurately adjusted, the oxygen concentration in the indoor space is controlled, the use comfort of personnel is guaranteed, an oxygen bottle does not need to be manually and actively held for oxygen inhalation, and the working efficiency is improved. Under the action of the oxygen tent with certain sealing performance, oxygen is generated and escaped out of the oxygen tent to the minimum extent, it is guaranteed that the space is in the specific oxygen concentration, and altitude stress caused by plateau hypoxia is well recovered.

The invention relates to the technical field of civil air defense equipment, in particular to civil air defense protection equipment with a polyurea coating, which comprises a civil air defense door body, a support mounting assembly, an easily-detachable connecting assembly and a maintenance treatment assembly, the surface and an internal interlayer of the civil air defense door body are both provided with the polyurea coating, and one side of the civil air defense door body is provided with two support arms; the surface of the civil air defense door body is provided with the polyurea coating, the corrosion resistance and the anti-rust performance of a metal structure are improved, then when the civil air defense door body is installed, the supporting installation assembly with the maintenance treatment assembly and the easy-to-disassemble connecting assembly is arranged, when a bearing movably connected with the civil air defense door body is damaged and replaced, rapid and convenient replacement can be conducted, and the service life of the civil air defense door body is prolonged. In addition, the maintenance processing assembly can achieve water vapor blowing drying on the surface of the supporting connecting box and convenient lubrication of a supporting bearing in the supporting connecting box, and the using convenience and the corrosion-resistant safety of the civil air defense door body are further improved.

The utility model belongs to the technical field of explosion venting membrane windows, and particularly discloses a nuclear power flying object prevention explosion venting membrane window which comprises an outer window frame, an inner window frame and an explosion venting membrane, the outer window frame and the inner window frame are rotationally installed through a hinge, and locking fasteners are arranged on the sides, away from the hinge, of the outer window frame and the inner window frame. An explosion venting through cavity is formed in the inner side of the inner window frame, the explosion venting membrane is installed in the explosion venting through cavity of the inner window frame in a sealed mode through a plurality of locking pieces, and meanwhile a steel grating abutting against the end face of the explosion venting membrane is arranged on the inner side of the inner window frame. When high pressure occurs indoors, the explosion venting film is exploded to quickly release indoor pressure, damage to indoor equipment, instruments and meters caused by the fact that external flying objects are rolled up by tornado is prevented, and meanwhile damage to the indoor equipment, instruments and meters caused by pressure increase after indoor explosion is prevented. And meanwhile, follow-up workers can conveniently replace and install the explosion venting membrane.

A green energy-saving cold store is provided, including a cold room, a platform, a machine room, and a refrigerating system. A drying layer (1) is arranged below the first floor of the cold room; a ground heat insulation layer (2) is moved downwards into the drying layer (1) and is separated from a first floor slab (3); an inner wall (4), an internal partition wall, and the wear-resistant waterproof floor (33) are directly located on the first floor slab (3) and integrated with a frame structure; a peripheral protective wall adopts a light steel structure wall surface (14), and is connected to the frame structure by means of ball joint tie beams (15) at the intersection points between frame beams and columns. The cold store is energy-saving and environment-friendly, and has good anti-seismic and fireproof performance.

The utility model discloses a dangling type anti-explosion-wave valve which comprises an anti-explosion-wave valve body, a wave valve plate is arranged on one side of the anti-explosion-wave valve body, an anti-impact buffering structure is arranged on the periphery, located on one side of the anti-explosion-wave valve body, of the wave valve plate, and a ventilation opening is formed in the side, right opposite to the wave valve plate, of the anti-explosion-wave valve body. A ventilation opening is formed in the air cushion matching cavity, a dustproof net is connected into the ventilation opening, a lock rod is arranged at the position, located on one side of the anti-explosion valve body, of the lower end of the anti-explosion valve plate, and a lock hole is formed in the side, right opposite to the lock rod, of the anti-explosion valve body. And after the wave valve plate is closed, the lock rod can be aligned and automatically inserted into the lock hole, the lock rod entering the lock hole pushes the lock block and is clamped in the lock groove, the lock rod can be fixed, and when the wave valve plate is opened for ventilation, dust in air outside a door can be effectively blocked through the dustproof net.

The utility model relates to the technical field of wind-resistant doors, discloses a folding wind-resistant door, and solves the problems that a folding door focuses on the functions of folding and sliding, has less attention to a locking mechanism, and is easy to cause interaction failure or not firm enough in locking. A folding type wind-resistant door comprises a wind-resistant door plate, an upper sliding rail, a lower sliding rail, a first sliding block, a second sliding block and a limiting assembly, when the limiting block is pulled, a telescopic rod and a spring are in a stretching state, when the wind-resistant door plate is adjusted and is in a closed state, the limiting block is loosened, and under the reaction effect of the spring, the wind-resistant door plate is folded. The limiting block retracts, penetrates through the through groove and is connected with the limiting groove in an embedded mode, so that the limiting sliding block and the limiting sliding groove are fixed conveniently, the wind-resistant door plate is fixed, the position of the wind-resistant door plate is conveniently and rapidly adjusted and locked, and the stability of the wind-resistant door plate when encountering strong wind is improved.

The utility model discloses an anti-theft door with an anti-prying function, and relates to the technical field of anti-theft doors, the anti-theft door comprises a door body and a door lock, one side of the middle end of the door body is provided with a mounting groove, the door lock is fixedly arranged in the mounting groove, one side of the door lock is provided with a spring bolt, one end of the spring bolt extends to the outer side of the door body, and the other end of the spring bolt extends to the outer side of the door body. A fingerprint recognition module is fixedly arranged at the upper end of the inner side of the door lock, a mechanical lock hole is formed in the lower end of the inner side of the door lock, a sliding groove is formed in one side of the mounting groove, a limiting block is slidably arranged in the sliding groove, and a plurality of first decoration blocks are fixedly arranged in the middle of the front side of the door body. An adjusting groove is formed in the middle of the door lock and located between the first decorative block and the mounting groove, and a second decorative block is clamped to the front side of the adjusting groove. The lock hole of the door lock can be shielded and protected, the door lock can be effectively prevented from being pried up by lawbreakers, and the protection performance is high.

The utility model discloses an intelligent community double-door half-height shielding door which comprises a protection shell, a sliding door assembly is arranged in the protection shell and comprises a nut block, a slot is in sliding connection with the interior of the side wall of the top of the protection shell, the top of the protection shell is fixedly connected with an outer protection box, and the outer protection box is fixedly connected with an inner protection box. The top of the protective shell is further fixedly connected with a sliding rail, the outer wall of the sliding rail is slidably connected with a blocking sliding door, the two sides of the blocking sliding door are fixedly connected with L-shaped connecting rods, the L-shaped connecting rods are inserted into the inserting grooves, the sliding door assembly further comprises a top cover, and the top cover is fixed to the top of the outer protective box through bolts. The utility model relates to the technical field of shielding doors. According to the double-door half-height shielding door for the intelligent community, when the blocking sliding door needs to be disassembled, the top cover is separated from the top of the outer protection box, then the blocking sliding door can be directly taken up to vertically move upwards, and the disassembly can be quickly completed by enabling the L-shaped connecting rod to be separated from the inserting groove.

The utility model discloses a dangling anti-explosion valve, and relates to the technical field of civil air defense engineering. The door comprises a door frame, a through groove is formed in the side wall of the door frame, a filtering assembly is arranged in the through groove, a filtering plate in the filtering assembly is arranged in the through groove, an inserting rod is connected to the side wall of a movable frame arranged on the side wall of the filtering plate, and the inserting rod is connected with an inserting hole formed in the inner side wall of the through groove in an inserted mode. A through hole is formed in the side wall of a sliding block fixedly connected to the inner side wall of the movable frame. A dangling valve assembly is arranged on the outer side wall of the door frame. According to the utility model, the filter component is arranged, so that the working steps during disassembly and assembly of the filter plate are effectively simplified, the filter plate is conveniently and quickly disassembled and assembled, the disassembly, assembly, cleaning and replacement of the filter plate are facilitated, and the dangling valve component is arranged, so that the impact force between the dangling loose-leaf door and the door frame is effectively buffered while the automatic opening and closing of the dangling loose-leaf door are facilitated; and the protection effect and the stability are improved.

The present invention relates to the technical field of watertight doors, specifically a marine stable watertight hydraulic door, which includes a door panel and a door frame hinged to one end of the door panel. A square tube frame is fixed on one side of the door panel. After the door is closed, the square tube frame and the door frame are in sealing contact, and a plurality of bolt fixtures are connected between the door frame and the square tube frame. The bolt fixtures are arranged on the square tube frame and elastically snap into the grooves opened on the door frame. A bolt rack is in contact with the side of the door frame facing away from the square tube frame. The watertight door of the present invention has a normal mode, a watertight mode, and a fireproof mode. In the fireproof mode, the watertight door cannot be easily opened, and the crew cannot push the handle L bar without knowing the fire situation. In this way, the crew can know that there is a fire on the other side of the door and avoid the safety problem of the fire spreading outward after opening the door.

The invention belongs to the technical field of hyperbaric oxygen chamber equipment, and discloses a hyperbaric oxygen chamber door which is technically characterized by comprising a chamber wall, a door opening is formed in the surface of the chamber wall, a door plate is rotatably mounted on the surface of the chamber wall, and a door core matched with the door opening is fixedly mounted on the inner side wall of the door plate; an annular sealing rubber strip is fixedly installed on the inner side wall of the door plate, a decompression monitoring assembly is arranged on the surface of the door plate, an opening and closing mechanism matched with the cabin wall is arranged in the door core and comprises a clamping assembly and an adjusting assembly, the adjusting assembly comprises an inner control part and an outer control part, and the clamping assembly is connected with the outer control part. A protection mechanism matched with the door plate is arranged on the surface of the cabin wall, the protection mechanism comprises a protection rod, a storage assembly and a positioning assembly, and the pressure loss monitoring assembly is arranged to be matched with the sealing rubber strip, so that the air leakage condition of the hyperbaric oxygen cabin can be visually checked; therefore, the air leakage and pressure loss phenomena of the hyperbaric oxygen chamber can be adjusted in time.

The utility model relates to the technical field of baking machines, in particular to an explosion door for a nut baking machine, which comprises at least one sealing door arranged on a door frame of the nut baking machine, at least two safety structures and one safety structure are arranged on the periphery of each sealing door, each locking structure comprises a locking part, and the locking parts are arranged on the door frame on the peripheries of the sealing doors; the locking part comprises a stud, a fixing piece and a nut, the stud is fixedly arranged on the door frame, a through hole is formed in the fixing piece, one end of the stud penetrates through the through hole and is fixedly connected with the nut, and the bottom face of the fixing piece makes contact with the surface of the sealing door; the safety structure comprises a lock chain, and the lock chain is arranged on the door frame and fixedly connected with the sealing door. The explosion-proof door for the nut baking machine has a sealing function, when abnormal conditions occur, the sealing door leaves the frame body for pressure relief, and the sealing door is pulled by the chain on the door frame, so that the whole sealing door cannot fly out, and the safety of operators is guaranteed.

The utility model relates to the technical field of anti-theft doors, in particular to a seamless anti-theft door which is internally provided with a door frame, a blocking door is arranged in the door frame in a rotating mode, a handle is fixedly arranged on the front end face of the blocking door, and an elastic sealing frame is fixedly arranged on the rear end face of the blocking door. Outside air is blown to the side, away from the blocking door, in the closed working cavity through the air inlet, and at the moment, the air pressure of the side, away from the blocking door, of the closed working cavity is increased, so that the movable closed block moves towards the side close to the center, and the end face of the side, close to the center, of the movable closed block completely enters the closed cavity to be matched with the closed cavity; meanwhile, the inclined positions of the upper and lower sides of the front end face of the attaching rear frame and the inclined positions of the upper and lower sides of the rear end face of the elastic sealing frame are attached and fixed, and during attaching, the attaching rear frame and the elastic sealing frame can be extruded, so that the seamless sealing structure has the seamless characteristic, seamless closing can be performed, and the conditions of air leakage and prizing are effectively prevented.

There is provided a screen system. The system may include frame assemblies defining a frame, and a sheet of infill material secured to the frame. One or more of the frame assemblies may include: an outer sash including a first sidewall, a second sidewall, and first engagement member(s), with the first sidewall including a retaining portion; a cover sash including second engagement member(s) configured to engage the first engagement member(s) such that the cover sash occupies a position opposing the retaining portion of the first sidewall and, in combination with the retaining portion, defines a channel therebetween; and an inner sash disposed in the channel between the retaining portion and the cover sash, the inner sash configured to retain an end of the sheet of infill material. There is also provided a method of assembly.

An electric push control system for a vertically pivoted protective door. The electric push control system comprises: a protective door, the protective door comprising a door body; and an electric-cylinder-driven vertically pivoted door body opening and closing device, which comprises a driving electric motor module and a push rod in power connection with the driving electric motor module, with the electric-cylinder-driven vertically pivoted door body opening and closing device being hinged relative to a mounting base, and the push rod being hinged to the door body. In the present invention, the door body is driven by an electric cylinder structure to open and close, and the present invention achieves a small arrangement space and a large opening and closing torque; the electric-cylinder-driven vertically pivoted door body opening and closing device has a simple structure, reducing the complexity of maintenance and management; compared with a hydraulic driving system, the electric-cylinder-driven vertically pivoted door body opening and closing device does not require the periodical replacement of hydraulic oil, the cleaning of an oil path and the maintenance of hydraulic elements, thereby reducing the maintenance cost and workload, and providing a solution conforming to environmental protection and modern management. After being put into practical application, the present invention can solve problems in the prior art, such as inconvenient maintenance and a low level of operating safety, caused by using a hydraulic driving system in a protective door.

An assembly for securely enclosing a door opening or window opening defined by a structure of a building comprising. The assembly includes a panel that is sized to substantially cover the opening and is pivotally secured to a frame. In some cases, the panel includes a proximal side pivotally connected with the frame and a distal side that swings between an open and closed position. The panel includes a door guard configured to protect the distal side of the panel from being forcibly pried away from the frame.

The utility model relates to a bridge airtight door which comprises a door frame system, a door leaf system, a rotating system, a locking system and a sealing mechanism. The door leaf system comprises a door leaf panel, a lug plate, a rotating seat and a door leaf partition plate; the door frame system provides frame support for the door leaf system, the rotating system, the locking system and the sealing mechanism, the rotating system is fixed to the door frame system through a lug plate, and the locking system and the sealing mechanism are used in cooperation to achieve overall locking and sealing of the airtight door. The access door is ingenious in conception, fast and stable in operation, safe and reliable, has airtight, impact-resistant, windproof, dustproof and moistureproof functions, can simultaneously achieve double purposes of access door maintenance and windproof and moistureproof, prolongs the service life of a bridge, is convenient to operate and simple to use, and solves the problems that an access door of an existing bridge project is difficult to disassemble and assemble, labor intensity of operators is large, and maintenance cost is low. And compared with the prior art, the bridge protection device has a very good market prospect and a very good development space.

The utility model relates to the technical field of grain depot door waterproof wallboards, and discloses a central reserve grain depot door waterproof wallboard which comprises a door frame, a first waterproof wallboard body and a second waterproof wallboard body are movably connected to the inner surface of the right middle of the door frame, and the first waterproof wallboard body is located on one side of the second waterproof wallboard body. The outer surfaces of the rear ends of the first waterproof wallboard and the second waterproof wallboard are fixedly connected with a fixing frame, and the outer surfaces of the right middle portions of the front ends of the first waterproof wallboard and the second waterproof wallboard are fixedly connected with a wallboard waterproof assembly. The waterproof wallboard of the grain bin door can be conveniently and rapidly closed and sealed, when the waterproof wallboard needs to be opened, the waterproof wallboard can be opened and closed just like a common door, dismantling is not needed, the situation that a large number of materials are wasted after dismantling is reduced, and meanwhile the waterproof, rat-proof and insect-proof effects can be further improved; and a better use prospect can be brought.

A hollow man sized door includes a core and an acrylic outer surface. The acrylic outer surface is seamless and solid. Mounting brackets are selectively attached to the core. Hardware is attached to the door at locations of the mounting bracket. Scratches or damage may be buffed out of or wiped from the acrylic outer surface.

The invention relates to the technical field of vault security and protection systems, in particular to an automatic vault door protection system which comprises a door frame, a door body, an observation assembly, a self-locking assembly, a protection assembly and an alarm device. The self-locking assembly automatically locks the door body and the door frame in a multi-point mode when detecting abnormity. The protection assembly acts synchronously to physically isolate the coded lock and the operation area; according to the invention, the upgrading from passive mechanical protection to intelligent active protection is realized, the integrated functions of abnormal recognition, automatic locking, dynamic protection and remote alarm are realized, and the safety and emergency response capability of the vault door are remarkably improved.

The invention provides a steel structure civil air defense door and belongs to the field of steel structure civil air defense doors, the steel structure civil air defense door comprises a door frame and a civil air defense door body arranged on the door frame, the civil air defense door body is rotatably connected to the door frame, and the steel structure civil air defense door is characterized in that four sets of sealing grooves are formed in the inner wall of the door frame, and second sealing strips are arranged on the inner walls of the four sets of sealing grooves; the sealing mechanism is arranged in the cavity; the locking mechanism is arranged on the side walls of the door frame and the civil air defense door, the sealing mechanism is provided with the sealing mechanism, the sealing mechanism inflates compressed air into an air bag through an air pump, the air bag is expanded, the air bag drives a first sealing strip to be extruded into a sealing groove and matched with a second sealing strip, and therefore the civil air defense door can be tightly attached to the door frame; the elastic sealing layer is formed, the sealing strip cannot be damaged due to extrusion, the sealing effect cannot be affected after long-term use, and therefore the protection effect can be improved.