472results about "Radiation protection" patented technology

The invention discloses a radiation protection shielding door convenient to adjust, and belongs to the technical direction of radiation protection, the radiation protection shielding door comprises a protection door mounting frame, and the protection door mounting frame is provided with a first radiation protection shielding door, a first moving pulley, a second moving pulley and a second radiation protection shielding door; the first radiation protection shielding door is arranged on the protection door mounting frame in a sliding mode, and the second radiation protection shielding door is also arranged on the protection door mounting frame in a sliding mode and located on one side of the first radiation protection shielding door. The single door or the double doors can be selected for radiation protection shielding operation according to different sizes of entrances and exits of operation rooms, the applicability is wider, the single door or the double doors can be rapidly switched, operation is convenient and fast, the complexity is low, the sealing performance of the two groups of radiation protection shielding doors can be improved through the protection gaskets, and the service life is prolonged. Meanwhile, abrasion between the two groups of radiation protection shielding doors can be avoided, and the service life of the door body is prolonged.

The invention belongs to the technical field of shielding doors, particularly relates to a medical polymer radiation shielding door seam sealing device, and aims to solve the problems that a sealing rubber strip arranged on the side, close to a wall, of an existing lead door can be abraded under long-time friction, so that the sealing effect is reduced, leakage is difficult to detect when abrasion is small, and outdoor safety is affected. According to the scheme, the shielding door comprises a door frame and a shielding door body arranged on one side of the door frame in a sliding mode, a mounting base is arranged on one side of the door frame, a speed reducer is fixedly arranged on the top of the mounting base, a motor is fixedly arranged on one side of the speed reducer, and the output end of the motor is fixedly connected with the input end of the speed reducer; through the cooperation of the motor and the speed reducer, efficient driving and smooth sliding are achieved, multiple sealing and linkage sealing are achieved in cooperation with the sealing mechanism, meanwhile, safety can be guaranteed through the monitoring mechanism, and powerful guarantee is provided for the safety and reliability of the medical environment.

A door assembly provides EMC shielding to provide EMI / RFI protection. The door assembly has an EMC door frame, an EMC door, and EMC seals for maintaining a circuit between the door frame, the floor (e.g., threshold, flooring, etc.), and / or the door. The door assembly may also utilize one or more EMC elements (e.g., EMC tape, paint, adhesive, coatings, caulk, etc.) that may be used to create the circuits between the components of the door assembly and / or with other components of the building (e.g., between the door frame and the wall). The EMC shielding is used to reduce (e.g., limit, block, etc.) the levels of electrogenic interference (EMI) / radio frequency interference (RFI) radiation that is able to pass by the shielding. Moreover, the door assembly also provides improve additional door assembly performance (e.g., sound, weather, air flow, heat, cold, or the like abatement, energy harvesting, or other performance benefits).

The utility model discloses a flat opening type threshold-free electric shielding door, and relates to the technical field of shielding doors. Comprising a main door body connected with a door frame through hinges, and a first driving mechanism used for driving the main door body to rotate is arranged on the main door body; the auxiliary door body is mounted on the main door body and is in sliding fit with the main door body in the vertical direction; the movable shielding body is mounted on the auxiliary door body and is in sliding fit with the auxiliary door body in the horizontal direction; the second driving mechanism is mounted on the auxiliary door body and is used for driving the auxiliary door body to lift and driving the movable shielding body to translate; the guide rail is arranged in a door groove in the front side of the door frame; and the moving trolley is in sliding fit with the guide rail, and in the door opening state, the moving trolley slides to the front of the door frame to fill and level up the door groove. The requirement for transferring large equipment is met through the threshold-free design, and meanwhile the beryllium copper reeds can be prevented from being damaged.

The invention relates to the technical field of explosion-proof wave valves, and provides a dangling type explosion-proof wave valve with an electromagnetic shielding function. The dangling type anti-explosion-wave valve with the electromagnetic shielding function comprises a door frame and a door leaf which are matched with each other, a ventilation cut-off waveguide window is installed at the position, corresponding to a ventilation window, of an inner door plate of the door leaf, an electromagnetic shielding sealing assembly is arranged at the position of a gap between the door frame and the door leaf, and the door frame and the door leaf are connected through a manual locking assembly. Opening and closing operation of the door leaf is achieved. The dangling type explosion-proof wave valve with the electromagnetic shielding function can effectively prevent explosion wave impact and electromagnetic pulse impact damage, protect the safety of indoor equipment and personnel, guarantee normal use of electronic information equipment, effectively maintain national defense safety, meet the requirement for uninterrupted ventilation and improve the safety of the electronic information equipment. And a good working environment is provided for internal personnel.

The invention provides a piston type shielding door, and particularly relates to the technical field of radiation shielding, the piston type shielding door comprises a door frame, and the door frame is mounted on a wall body. The upper portion of the side, facing the door frame, of the door body and the left side and the right side, close to the door frame, of the door body are concave inwards to form stepped structures, the moving direction of the door body is perpendicular to the wall, and the door frame is matched with the door body to form labyrinth seal. And the sliding device is fixedly mounted at the bottom of the door body. And the bearing device is mounted on the ground at the bottom of the door body, and the bearing device is interactively matched with the sliding device. And the driving device is fixedly installed on the side, away from the door frame, of the door body, and the driving device is used for driving the door body to move on the bearing device through the sliding device. According to the piston type shielding door, the technical problems that a shielding door is poor in shielding effect, high in construction requirement and serious in abrasion of internal parts are solved, and the piston type shielding door is complete in shielding, low in construction difficulty and long in service life.

The invention discloses a fireproof low-magnetism freight magnetic shielding door with a large magnetic shielding space. The fireproof low-magnetism freight magnetic shielding door comprises a door leaf; the door frame is mounted inside the portal frame; the locking mechanism assists in opening and closing the door leaf; wherein the door leaf is in butt joint with the door frame to form a magnetic shielding continuous structure; wherein the door leaf and the door frame are fixed and released through a locking mechanism; a sliding rail mechanism is arranged on the door leaf and matched with the door frame to achieve opening and closing. The door leaf and the door frame are each of a multi-layer composite structure which comprises a fireproof plate, a magnetic shielding layer and a copper layer, the multiple functions of fire prevention, magnetic shielding and electromagnetic shielding are achieved, and the overall performance and the space utilization rate are improved. And when the permalloy is prevented from being excessively pressed, the butt joint precision is improved, the magnetic leakage at the door slot is reduced, and the opening force is low while the high magnetic shielding effect is achieved.

The utility model provides a radiology department protective door which comprises a protective door body, an observation window is arranged on the protective door body, a transparent visual baffle is installed on the observation window, the protective door body is provided with an air blowing mechanism blowing air towards the visual baffle, the air blowing mechanism comprises a motor and fan blades, and a sealing shell is arranged outside the air blowing mechanism in a wrapping mode. The part, provided with the observation window, of the protective door body is provided with an air blowing hole communicated with the air blowing mechanism. According to the utility model, hot air is continuously introduced into the visual baffle plate at the observation chamber for a period of time, so that water mist is removed, and sight interference to observation of people is avoided.

The utility model discloses a push-pull type threshold-free electric shielding door, and relates to the technical field of shielding doors. Comprising a double-layer door body which comprises a main door body and a movable shielding body, and the main door body is provided with a driving mechanism used for driving the movable shielding body to move horizontally in the direction perpendicular to the main door body; the push-pull guide rail is arranged above the double-layer door body, and the top of the main door body is in sliding fit with the push-pull guide rail through a roller mechanism; the supporting guide device is parallel to the push-pull guide rail and located below the main door body, and a guide rod in sliding fit with the supporting guide device is arranged at the bottom of the main door body; the moving trolley is connected with the bottom of the main door body and slides along the supporting and guiding device along with the main door body, and the moving trolley moves into the door groove in the front side of the door frame in the door opening state. The utility model can solve the problem that the beryllium copper reed has great unnecessary wear and is difficult to replace.

The neutron shielding door comprises a stand column, a door leaf and a shielding box, the stand column is arranged on one side of a wall, the door leaf correspondingly covers one side of a door opening, and the edge of the side, facing the stand column, of the door leaf is connected with the stand column in a matched mode; the shielding box is movably arranged on the edge of the bottom side of the door leaf. When the door leaf is matched with the door opening to be closed to one side wall face of the wall, the top side edge of the door leaf, the left side edge of the door leaf and the right side edge of the door leaf abut against the wall face of the wall on the top side of the door opening, the wall face of the wall on the left side of the door opening and the wall face of the wall on the right side of the door leaf in a one-to-one correspondence mode respectively. At the moment, the shielding box can descend relative to the bottom side edge of the door leaf until the bottom side surface of the shielding box abuts against the ground. The enough gap is reserved between the door leaf and the ground to achieve stable opening and closing of the door leaf, meanwhile, the shielding box blocks the gap in the bottom side of the door leaf in the closed state of the door leaf, and neutron rays on the inner side of the neutron shielding door are further prevented from penetrating through the door body.

The utility model discloses an electromagnetic shielding door capable of expanding shielding effectiveness, which comprises a door frame, a door leaf, a slotting tool type reed, a manual door opening mechanism, an air cylinder, a handle, a mechanical / electronic access control, a travel switch, a full-automatic door machine and a hinge, four circles of slotting tool type reed are arranged on the door frame, one circle of slotting tool type reed is arranged on the door leaf, and the door frame and the door leaf are fixed through the hinge. Three bolts on the hinge are fixed on the door frame, and eight bolts on the hinge are fixed on the door leaf; according to the shielding door, the number of the reeds can be changed according to the shielding effectiveness needed by the shielding door, the reeds are detached from the reed substrate when the shielding requirement is low, the reeds are directly installed on the reed substrate for use when the shielding requirement is high, the three-circle reeds of the shielding door are fixed, the two-circle reeds of the shielding door are detachable, and the shielding door is convenient to use. And during use, self-assembly can be realized according to the shielding effectiveness requirement, so that the use scene is increased.

The utility model discloses a guide ventilation cut-off waveguide window for a dangling type explosion-proof wave shielding valve, which belongs to the technical direction of waveguide windows and comprises an inclined ventilation cut-off waveguide window, a static pressure absorption cabin, a horizontal ventilation cut-off waveguide window, a door leaf outer door plate and a door leaf inner door plate. The oblique ventilation cut-off waveguide window is welded to one end of the outer door plate of the door leaf, the oblique ventilation cut-off waveguide window, the static pressure absorption cabin and the horizontal ventilation cut-off waveguide window are used in cooperation, a double-layer combined ventilation waveguide structure is adopted, and a wave absorption material is attached to the static pressure absorption cabin, so that electromagnetic waves are reflected and absorbed for multiple times in the static pressure absorption cabin; electromagnetic wave energy entering the shielding body is greatly weakened, the overall shielding effectiveness is improved, meanwhile, the static pressure absorption cabin can evenly distribute air volume, stabilize airflow, reduce airflow vibration and noise, convert part of dynamic pressure into static pressure, reduce dynamic pressure loss, improve the efficiency of a ventilation system, enable air to be blown farther, and effectively reduce the length of the hexagonal waveguide structure.

The utility model discloses an electromagnetic shielding door convenient to disassemble and assemble. The electromagnetic shielding door comprises an installation frame, a door frame and a locking mechanism. Symmetrically-distributed T-shaped inserting grooves are formed in the upper end and the lower end of the mounting frame, uniformly-distributed mounting plates are fixedly connected to the rear side face of the mounting frame, and limiting blocks are rotationally connected to the rear ends of the mounting plates correspondingly; symmetrical T-shaped inserting blocks are fixedly connected to the upper end and the lower end of the door frame, the T-shaped inserting blocks are connected with the adjacent T-shaped inserting grooves in the rear side in an inserted mode, a shielding door is hinged to the left end of the door frame through hinges, evenly-distributed rotating tables are fixedly connected to the rear side face of the door frame, fixing rings are rotationally connected to the front ends of the rotating tables, and the fixing rings and the adjacent limiting blocks in the rear side are installed in a matched mode; according to the electromagnetic shielding door convenient to disassemble and assemble, a T-shaped insertion block and a T-shaped insertion groove are matched for positioning, and a fixing ring and a limiting block are matched for fixing, so that disassembly and assembly of the shielding door are facilitated.

The utility model discloses a metro platform screen door protection device with an alarm function, and relates to the technical field of metro platform screen doors, the metro platform screen door protection device comprises a platform screen door body, the front side of the platform screen door body is provided with a third limiting groove, the inner side of the third limiting groove is provided with a protection plate, and the interior of the platform screen door body is fixedly connected with an anti-collision alarm. A sensing head of the anti-collision alarm is attached to the rear side of the protection plate, the front side of the shielding door body is in threaded connection with a limiting plate, and the rear side of the limiting plate is attached to the front side of the protection plate. By the adoption of the structure, when the protection plate is collided, the collision force borne by the protection plate can be transmitted into the anti-collision alarm through the inductive head, and therefore the anti-collision alarm can sound, a worker can conveniently know which shielding door body is collided in time, and the working efficiency is improved. Therefore, the shielding door body with potential safety hazards can be maintained at the first time.

This invention provides a high-efficiency shielding building for radio telescopes, belonging to the technical field of electromagnetic shielding for radio telescopes. It includes a wall, a shielding window, and a shielding door. Ventilation openings are provided in the wall. The shielding window is fixedly connected to the inner wall of the ventilation opening, and an air duct is provided in the window. The shielding door is located at the ventilation opening; the shielding door is rotatably connected to the wall; the shielding door is used to open or close the shielding window. The high-efficiency shielding building for radio telescopes provided by this invention, while ensuring the building's electromagnetic shielding effectiveness, breaks through the limitation of air circulation by fully enclosed walls, constructing an air circulation path between the interior and the outside, effectively solving the core defect of lacking natural ventilation in existing technologies.

To provide a door structure which can facilitate the delivery work upon door structure exchange in an existing facility and therefore can reduce the number of installation steps and costs.SOLUTION: A radiation-shielding door 1 with a function of shielding radiation is configured to include a door body 2, a door frame containing a first member F1 and a second member F2, a first hinge 3, and a second hinge 4, the door frame being formed by combining the first member F1 and the second member F2 in a joint manner in the thickness direction (front-to-back direction) of the door body 2.SELECTED DRAWING: Figure 2

The utility model relates to the technical field of glass, in particular to a multifunctional composite glass structure, which comprises a glass main body and an outer frame wrapped on the periphery of the glass main body, the glass main body is provided with two layers, the outer frame consists of a top plate and side plates, a cavity is arranged between the two layers of glass main bodies, and an adjustable shading component is arranged in the cavity. According to the multifunctional composite glass structure, the two shielding layers are arranged on the two sides of the high-transmittance layer of the glass body, the shielding effect can reach 100 dB, electromagnetic wave interference can be eliminated, the heating layer is arranged, the heating effect can be achieved, the defrosting and demisting functions are achieved under low-voltage driving, and due to the fact that the shading assembly is arranged, the shielding effect is good. When light is too strong and needs to be shielded, the adjusting motor is controlled to start to drive the worm to rotate, then the worm gear drives the rotating shaft and the light shielding blades to rotate by a certain angle, the light shielding blades are made to be in a vertical state, and the light intensity can be greatly weakened.

The utility model discloses a platform screen door linkage locking structure and a platform screen door applying the linkage locking structure, the platform screen door linkage locking structure comprises a chain transmission mechanism, a cylinder assembly and a sliding locking mechanism, the sliding locking mechanism is installed on the chain transmission mechanism, the chain transmission mechanism is connected with the cylinder assembly, and the cylinder assembly is connected with the sliding locking mechanism. Fixed pulley blocks are installed at the two ends of the chain transmission mechanism, the chain transmission mechanism can be driven by the air cylinder assembly to conduct chain transmission around the fixed pulley blocks, and the sliding locking mechanism is synchronously driven to lock the shielding door during chain transmission. Compared with the prior art, the shielding door locking structure has the advantages that multi-point and multi-power-source synchronous locking can be achieved through a simple mechanical structure, the shielding door can be locked after the shielding door is in place, stability is kept for a long time, and good shielding effectiveness is achieved.

The shielding door with the passive drainage function comprises a door frame, a door leaf is connected to the door frame through a hinge, a locking mechanism is arranged on one side of the door frame, opening and closing of the door leaf are achieved through the locking mechanism, a drainage door is connected to the door leaf through a rotating shaft, a drainage door lock is arranged at the bottom of the door leaf, and the door leaf is connected with the drainage door through a rotating shaft. A pulley is arranged on the wall on the lower portion of the door frame, a zipper A is arranged on the pulley, a floating ball A is arranged at one end of the zipper A, a balancing weight is arranged at the other end of the zipper A, and the balancing weight is connected with a drainage door lock through a zipper B. When the water level on one side of the shielding door rises, the drainage door on the shielding door is passively started through the floating ball device, accumulated water is drained to the other side of the door, field operation of personnel is not needed, and the personal safety of the personnel is guaranteed.

The utility model relates to the technical field of radiation-proof door pockets, and provides a radiation-proof door pocket structure which comprises a door plate, a handle is arranged on the outer wall of one side of the door plate, a sealing structure is arranged outside the handle on the outer wall of the door plate, and the sealing structure comprises first fixing glue, a first sealing strip, a second sealing strip and second fixing glue. The bottom ends of the first fixing glue are fixed to the edge of the outer wall of the door plate, a first sealing strip is fixed to the top end of the first fixing glue, and a second sealing strip is arranged at the top end of the first sealing strip. The sealing structure is arranged, the first sealing strip is fixed to the outer side of the door plate through the first fixing glue, the second sealing strip is fixed to the outer side of the protection structure through the second fixing glue, the door plate is driven by pulling the handle, and when the door plate and the protection structure are located in the same horizontal direction, the first sealing strip and the second sealing strip abut against each other; the sealing effect of the radiation-proof door pocket is achieved, and the sealing performance of the radiation-proof door pocket is improved.

The utility model relates to the technical field of radiation protection, in particular to a radiation-proof translation protective door which comprises a horizontal sliding rail, a square door plate and a filling beam extending in the first direction. The sliding rail extends in the first direction and is located above a door opening to be blocked. The upper end of the door plate is fixed to a frame body of the walking wheel assembly, the walking wheel assembly can walk along the sliding rail, and a groove is formed in the floor below the door plate. The filling beam is arranged on the lower portion of the door plate, a containing groove is formed in the lower end of the door beam, and the filling beam can vertically ascend and descend to enter or break away from the containing groove. Guide rods vertically penetrating through the door plate are arranged at the two ends of the door plate in the first direction correspondingly, the upper ends of the guide rods are connected with a pressing frame, and a pressing wheel is rotationally installed on the pressing frame; the lower ends of the guide rods are fixed with filling beams; and pressing blocks corresponding to the pressing wheels are fixedly arranged below the sliding rails, in the state that the door plate blocks the door opening, the pressing wheels incline downwards along the inclined faces, and the guide rods move downwards to enable the filling beams to stretch out of the containing grooves downwards so as to fill the grooves.

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 shielding door structures, in particular to a shielding door base insulation structure which is provided with an impurity and dust cleaning mechanism on the surface of an insulation pad, can keep the surface clean, avoids formation of a conductive area, ensures the insulation effect and improves the reliability. Comprising a platform, spiral groove rings, an insulation pad, a shielding door bottom frame, penetrating rings, a dust collection head, a conveying pipe, a dust collection cylinder, an inner filter cylinder, an air extracting pump, an exhaust pipe and fixing bolts, the multiple sets of spiral groove rings are arranged at the bottom of the platform in a penetrating mode, the insulation pad is arranged between the platform and the shielding door bottom frame, and the penetrating rings are correspondingly arranged at the bottom of the shielding door bottom frame; a fixing bolt penetrates through the penetrating ring and the interior of the insulating pad to be detachably installed on the inner side of the spiral groove ring in a screwed mode, the inner filter cylinder is detachably installed on the inner side of the dust collection cylinder, a screwed assembly and disassembly mechanism is arranged between the top end of the dust collection cylinder and the inner threaded cover, and the output end of the dust collection head is the same as the input end of the dust collection cylinder through a conveying pipe. And a sucking pump is arranged on the exhaust pipe.

The utility model discloses a novel electromagnetic shielding door and belongs to the technical field of electromagnetic shielding doors, the novel electromagnetic shielding door comprises a door frame and a power assisting assembly, one side of the door frame is connected with a shielding door plate matched with the door frame in a hinged mode, the power assisting assembly comprises a sliding rail, a power assisting rod and a U-shaped piece, and the sliding rail is fixedly installed on the upper side of the rear portion of the shielding door plate; the U-shaped piece is fixedly installed on the inner wall of the top of the door frame, one end of the power assisting rod is located in the sliding rail, the other end of the power assisting rod is located in the U-shaped piece, and the power assisting rod is slidably connected with the sliding rail; the servo motor acts to drive the first rotating shaft to rotate, the power assisting rod can be driven to rotate with the first rotating shaft as the circle center, and due to the fact that one end of the power assisting rod is located in the sliding rail and slidably connected with the sliding rail, the power assisting rod can drive the shielding door plate to rotate along the hinge connecting position in the rotating and sliding process; and the assisting effect in the opening and closing process of the shielding door plate is achieved, and the shielding door plate can be opened and closed more conveniently and rapidly.

The utility model discloses an anti-pinch anti-radiation door, and relates to the technical field of anti-radiation doors, the anti-pinch anti-radiation door comprises a door frame and a speed reduction assembly, the speed reduction assembly is arranged on one side of the inner wall of the door frame, the speed reduction assembly comprises a sealing groove, the sealing groove is formed in one side of the inner wall of the door frame, one side of the inner wall of the sealing groove is fixedly connected with a fixing plate, and the fixing plate is fixedly connected with the door frame. And one side of the fixed plate is fixedly connected with a servo motor. According to the anti-pinch anti-radiation door, by installing the speed reduction assembly, when the anti-radiation door body is closed, an air cylinder can push the anti-radiation door body to slide, then a servo motor controls a lead screw to rotate reversely at a low speed, an abutting rod on the lead screw slowly moves towards the side of the servo motor and makes contact with the anti-radiation door body all the time, and the closing speed of the anti-radiation door body is slowed down; and the contact rod is in contact with the anti-radiation door body, so that the telescopic rod and the spring are compressed, and the anti-radiation door body is buffered under the elastic recovery capability of the spring, so that the door closing speed is doubly slowed down, and the risk of pinching personnel is reduced.

The utility model relates to the technical field of anti-radiation movable doors, and provides an anti-radiation movable door capable of preventing radiation leakage, which comprises a movable door assembly and a protective assembly, the movable door assembly comprises a door frame, a cross beam and rollers, the protective assembly is arranged in the door frame, the cross beam is arranged above the door frame, and the rollers are arranged above the cross beam. And a moving structure is arranged in the cross beam. The protective structure is arranged, the rubber pad is moved to the top end of one side of the door frame, one end of the rubber base abuts against one end of the sliding groove, the rubber pad is moved, the rubber pad drives the rubber base to move into the sliding groove, the rubber base drives the connecting base to move into the through groove, and under the action of the connecting base, the rubber pad is prevented from being separated from the door frame; according to the anti-radiation sliding door capable of preventing radiation leakage, the sealing and buffering effects are achieved under the effect of the rubber pad, the function that the device is convenient to buffer and seal is achieved, and therefore the applicability of the anti-radiation sliding door capable of preventing radiation leakage in the using process is improved.

The utility model discloses an anechoic chamber shielding door convenient to install in the technical field of anechoic chamber shielding doors, and the anechoic chamber shielding door comprises an anechoic chamber shielding door, the outer wall of one end of the anechoic chamber shielding door is provided with a connecting plate, and the center of the surface of the connecting plate is provided with a positioning hole A; a square column is installed below the center of the front end face of the anechoic chamber shielding door, the structure is reasonable, the supporting seat and the hinge pin shaft are arranged, the supporting seat is arranged on the lower portion in the square column in a sliding mode through the supporting column, the outer wall of a screw in the square column is arranged in a threaded groove in the supporting column in a threaded connection mode, and therefore the supporting seat and the hinge pin shaft are fixed. The hand wheel is rotated to drive the screw rod to rotate forwards or backwards, the screw rod rotates forwards or backwards, the support can be synchronously driven to move upwards or downwards, and when the shielding door of the anechoic chamber needs to be straightened in the installation process, the shielding door of the anechoic chamber can be straightened and supported only by rotating the hand wheel and driving the support to make contact with the ground.

The utility model provides a sealing structure and a door with the same. The sealing structure comprises a sealing body used for sealing an outer door frame and an outer door body, an elastic supporting piece and an electromagnetic shielding layer. The sealing body is provided with a clamping part used for being connected with an external door frame and an abutting part used for abutting against an external door body. A containing cavity is formed in the sealing body and located between the clamping part and the abutting part, and the elastic supporting pieces are located in the containing cavity, distributed in the axial direction of the sealing body and used for supporting the sealing body. An electromagnetic shielding layer is arranged on the outer surface of the sealing body, and the electromagnetic shielding layer is distributed in the circumferential direction of the sealing body with the opening of the clamping part as the starting point. According to the sealing structure and the door with the sealing structure, the sealing structure has good elasticity, weather resistance and electromagnetic shielding performance and can adapt to diversified sealing environments, and the actual use requirements of users are met.

The utility model relates to the technical field of civil defense doors, in particular to a civil defense door structure which comprises a door frame, a sealing door is hinged to the right end of the front face of the door frame, and a clamping groove is formed in the front face of the door frame. According to the product, the sealing blocks are embedded into the clamping grooves to be spliced, the sealing performance is better when the clamping grooves made of rubber materials are connected, the sealing blocks are made of polytetrafluoroethylene, and the polytetrafluoroethylene is a low-friction, high-temperature-resistant and corrosion-resistant material, has excellent chemical corrosion resistance and can keep good sealing performance within a wide temperature range; the sealing performance of a product is effectively improved, noise transmission is effectively reduced, the product is closed by embedding a clamping block into the inner wall of a door opening, a sealing layer of the clamping block is made of a metal sealing material, the stability of the product is further enhanced, a sound insulation layer is arranged for further sound insulation, and the sound insulation effect of the product is effectively enhanced; and the influence of noise on the life of residents is effectively reduced.