145results about "Radiation protection" patented technology

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.

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.

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 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 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 provides an assembly type lead-free radiation protection device which comprises a box body, one side of the box body is provided with an opening, the opening is provided with a group of split type first protection door assemblies, and the first protection door assemblies are respectively hinged with the left side and the right side of the box body; each first protective door assembly comprises two protective doors which are arranged up and down and are opened and closed respectively, each protective door comprises a protective curtain and a frame driving the protective curtain to rotate, and when the two first protective door assemblies are closed, the protective curtains located on the left side and the right side are in left-right lap joint; and the upper and lower protective curtains in each first protective door assembly are overlapped up and down, so that the opening of the box body is closed. According to the assembly type lead-free radiation protection device, the infant incubator can go in and out and the opening of the incubator body can be sealed through opening and closing of the split first protection door assemblies, rays are prevented from leaking to the external environment during infant examination, and the health of other infants and medical staff in a ward is effectively protected.

The utility model discloses an electromagnetic shielding special door, and relates to the technical field of special doors. The electromagnetic shielding special door comprises a bearing type lower threshold, a door frame is fixedly connected to the upper end of the bearing type lower threshold, two door leaves are arranged on the front side of the door frame, an electromagnetic shielding assembly comprises an electromagnetic shielding strip, and electromagnetic shielding beryllium copper spring pieces are fixed to the periphery of the door frame through rivets; monel wire sealing strips are fixedly connected to the upper sides and the lower sides of the two door leaves and the corresponding sides, close to the door frame, of the two door leaves, slotting tool type folded edges are arranged on the peripheries of the door leaves, and electromagnetic shielding strips, electromagnetic shielding beryllium copper spring pieces, the monel wire sealing strips, the door frame and the shielding chamber are fixed through electric welding. After being fixed, the electromagnetic shielding strip covers the gap between the outdoor side door frame and the shielding room steel stand column, the graphite conductive adhesive is filled in the indoor side gap, and through the design of multiple electromagnetic shielding structures, the electromagnetic energy is effectively shielded, and the electromagnetic environment safety of places such as a cabinet and a shielding room is ensured.

The utility model discloses an anti-radiation pressure relief gas fire extinguishing door structure which comprises a door frame and a door body, the door body comprises a main frame, an anti-radiation lead plate is arranged on one side of the main frame and on the outer side of the door frame, and an outer protection steel plate covers the outer surface of the anti-radiation lead plate. An inner protection steel plate is arranged on the other side of the main frame and on the inner side of the door frame; a pressure relief frame is arranged at the lower end of the interior of the door body, a limiting frame is arranged on the inner side of the pressure relief frame, a movable pressure relief plate is arranged between the pressure relief frame and the limiting frame, a reset spring is arranged between the movable pressure relief plate and the pressure relief frame, a movable pressure relief groove is vertically formed in the movable pressure relief plate, and the movable pressure relief groove and the limiting frame are arranged in the movable pressure relief groove. Fixed pressure relief grooves are formed in the positions, corresponding to the movable pressure relief grooves, of the interior of the limiting frame, the pressure relief plates can be rapidly opened after being pressed, the pressure relief efficiency is guaranteed under the emergency situation, the fire fighting pressure relief requirement is met, the pressure relief plates are designed in a modularized mode and can be independently replaced, and the operation and maintenance cost is reduced.

This invention discloses an embedded dual-purpose (manual and electric) electromagnetic shielded door system, comprising an embedded door frame assembly, a gantry bracket assembly, a lower guide rail, an adjustable threshold component, a composite door leaf, a door leaf drive assembly, and a sliding assembly. The sliding assembly is connected to the composite door leaf via a lifting arm, and the door leaf drive assembly is connected to the lower guide rail. The door leaf drive assembly moves along the lower guide rail, opening and closing the composite door leaf in cooperation with the sliding assembly. The adjustable threshold component includes a threshold body, a threshold drive assembly, a lifting assembly, a lifting threshold, a linear drive assembly, and a support plate. The support plate is slidably mounted on the lifting threshold, and the threshold drive assembly and the lifting assembly drive the lifting threshold vertically up and down, sealing the bottom of the composite door leaf. This system has both manual and electric opening and closing modes, high reliability, secure connection, good electromagnetic shielding capability, good passage after the door leaf is opened, and broad application prospects.

The utility model discloses an anti-radiation lead sliding door which comprises a concrete wall body arranged at the top of a concrete ground, a hanging bar is fixedly installed at the top of the concrete wall body, a keel is installed at the bottom of the hanging bar, and the bottom of the keel is fixedly connected with a double-layer paper surface gypsum board through screws. A white antibacterial inorganic coating is laid at the bottom of the double-layer gypsum plaster board, a flame-retardant board base layer is installed on the right side of the concrete wall body, and a grain ice fire board is laid on the surface of the flame-retardant board base layer. The double-layer paper surface gypsum board, the white antibacterial inorganic coating, the first black wiredrawing stainless steel, the barium sulfate coating layer and the second black wiredrawing stainless steel are used in cooperation, the overall attractiveness of the ionizing radiation lead sliding door after installation can be improved, the whole installation is easy, construction of workers is facilitated, and through the arrangement of the sliding door limiter, the service life of the ionizing radiation lead sliding door is prolonged. Sliding of the ionizing radiation lead sliding door can be limited, so that the ionizing radiation lead sliding door slides according to a limited track.

The utility model discloses a test box door frame structure corresponding to an ESD (Electro-Static Discharge) electrostatic protection standard. The test box door frame structure comprises a box body, the anti-static door frame is fixed at one end of the box body and comprises an aluminum alloy outer frame, a first groove, a ceramic fiber plate, a composite sealing strip, a second groove, a wiring terminal and a grounding wire, the aluminum alloy outer frame is fixed at one end of the box body through screws, the first groove is formed in the side edge of the aluminum alloy outer frame, the ceramic fiber plate is fixed in the first groove, and the composite sealing strip is fixed in the second groove. The composite sealing strip is fixed on the ceramic fiber plate, the second groove is formed in the side edge of the box body, one end of the wiring terminal is fixed in the second groove, one end of the grounding wire is fixed on the wiring terminal, and the other end of the grounding wire is attached to the composite sealing strip. The door frame solves the problems that only temperature and sealing performance are concerned on an existing common door frame, but sensitive devices can be damaged by static electricity at extreme temperature when electronic components, semiconductors, precise instruments and the like are subjected to static electricity sensitive tests.

This utility model discloses a soundproof electromagnetic shielding door, comprising: a frame, the frame including two sets of tracks and two sets of side panels, the two sets of tracks being fixed to the top and bottom of the shielding room door opening respectively, and the two sets of side panels being fixed to both sides of the shielding room door opening respectively; a shielding door body, the shielding door body including a door frame, an inner door panel and an outer door panel; a sliding assembly, the sliding assembly being slidably connected to the tracks respectively, and the sliding assembly being rotatably connected to the door frame; an arm, the arm being rotatably connected to the two sets of tracks respectively, with a slider rotatably connected to one end of the arm, and the slider being slidably connected to the door frame; and a sealing assembly, two sets of sealing assemblies being provided, abutting against the door frame; the two sets of side panels abutting against the inner and outer sides of the door frame respectively, and copper sheets being fixed to the outer surface of the door frame, the inner door panel, the outer door panel, and the side panels respectively. This utility model effectively solves the electromagnetic interference problem while meeting the sound insulation requirements, and is suitable for places with high requirements for sound isolation and electromagnetic protection.

The invention discloses a closed protection type anti-radiation electric sliding door which comprises a power beam fixedly installed on a wall body, a door body hung on the power beam and a closed protection device, and the closed protection device comprises a lifting threshold assembled at the bottom of the door body, an auxiliary rail fixedly arranged on the wall body and a suspension assembly. Lead plates are arranged in the door body and the lifting threshold, an overlapped protection area is formed, the auxiliary rail is provided with a sedimentation groove matched with the closed station, and the suspension assembly and a traction rope form a mechanical linkage mechanism through a lifting hanger, a nylon roller and a traction rope. When the door body is closed, the nylon roller slides into the settlement groove along the auxiliary rail to drive the lifting hanger to sink, and the lifting doorsill is pulled by the traction rope to move downwards relative to the door body to shield the bottom gap; when the door body is opened, the nylon roller is separated from the settlement groove to reset the lifting hanger, and the lifting doorsill is pulled to move upwards to avoid friction interference. The radiation barrier effect is remarkably improved, the operation stability is optimized, and the multi-scene high-grade protection requirements of the medical radiology department, the nuclear industry laboratory and the like are met.

The utility model relates to the technical field of electromagnetic isolation efficient waveguide ventilation, in particular to an electromagnetic isolation efficient waveguide ventilation structure convenient to disassemble and assemble, which comprises a waveguide ventilation structure main body. The waveguide ventilation structure comprises a waveguide ventilation structure body and further comprises an isolation cover, a waveguide window assembly, a sealing ring and a connecting assembly, a mounting hole is formed in the lower end of the waveguide ventilation structure body, the isolation cover is fixed to the upper end of the waveguide ventilation structure body, a mounting window is formed in the lower end of the waveguide ventilation structure body, and the waveguide window assembly is connected to the inner side of the mounting window; according to the utility model, through precise sleeving of the waveguide window sleeve and the mounting window and stable connection of the limiting base and the bolt, the waveguide channel can be rapidly disassembled and assembled, and through arrangement of the copper foil electromagnetic isolation layer and the hexagonal waveguide channel, external electromagnetic interference is blocked while ventilation requirements are effectively guaranteed, and the ventilation effect is improved. The waveguide ventilation structure is convenient to disassemble and assemble, so that a user can operate more conveniently, the maintenance difficulty is effectively reduced, and the user experience is improved.

The utility model belongs to the technical field of ray protection doors, and particularly relates to a hidden protection device which comprises a shell, an elastic connecting part, an adhesive tape, an aluminum profile and a lead plate. The shell is arranged in a groove body in the bottom of the door leaf, a preformed hole is formed in the side wall of the door leaf and communicates with the groove body, and an elastic column on the elastic connecting part is arranged in the preformed hole; an elastic connecting part is arranged in the shell, an aluminum profile is connected to the lower portion of the elastic connecting part, a lead plate is arranged in the aluminum profile, a rubber strip is arranged outside the aluminum profile, the elastic connecting part is connected with the shell, and the shell is connected with a door leaf. According to the device, the lead plate is matched with the aluminum profile and the adhesive tape, so that rays can be blocked and shielded, radiation leakage is avoided, and the safety guarantee for a human body is improved.

The utility model belongs to the technical field of information identification, particularly relates to a limiting device for a shielding door of RFID (Radio Frequency Identification) scanning equipment, and provides the following scheme aiming at the problems that the existing limiting device is complicated in structure and high in cost, and the burden of purchasing and using the equipment is increased for some small enterprises or users with strict cost control. A rolling frame is rotatably connected in the support, electromagnetic shielding cloth is fixedly wound on the rolling frame, and a horizontal rotating shaft is fixedly installed in the rolling frame. When an RFID scanning device sends out a door opening / closing instruction, the driving motor rotates through the horizontal rotating shaft and the unwinding shaft to drive the electromagnetic shielding cloth of the shielding door to ascend and descend; when the electromagnetic shielding cloth of the shielding door arrives at a designated position and the positioning triggering device on the indexing adjusting gear triggers the microswitch, the driving motor can be controlled to stop, so that the electromagnetic shielding cloth can be stably limited, and good practicability is achieved.

The utility model provides a dangling type anti-explosion wave electromagnetic shielding valve which comprises a door leaf connected with a door frame in an opening and closing mode, and an outer metal net and an inner metal net are installed on the outer side and the inner side of a ventilation opening of the door leaf respectively. Conductive rubber groove plates are welded to the two sides of the door frame in an electromagnetic sealing mode, and a conductive rubber strip is arranged in each conductive rubber groove plate. And when the door leaf is closed, the door leaf, the conductive rubber and the door frame form electric contact. According to the embodiment, the layout of the double-layer hollow metal net can be formed at the ventilation opening, so that electromagnetic waves are reflected and absorbed for multiple times in the hollow cavity, and the impact of electromagnetic pulses can be effectively resisted. And the double-layer metal net is hollow, so that a certain static pressure cabin function can be achieved, air resistance can be effectively reduced, and the ventilation efficiency is improved. In addition, when the valve is closed, the inner door plate compresses the conductive rubber strip, so that the inner door plate is tightly jointed with the conductive rubber strip to form electric contact with the door frame, and the overall conductive continuity of the valve is ensured.

The present application relates to the technical field of safety equipment, in particular to a heavy radiation protection door with stable opening and closing, which comprises a door frame, symmetrical guide rails are fixedly connected to the upper and lower sides inside the door frame, a door plate is slidably connected to the inside of the door frame, a plurality of guide wheels are symmetrically rotatably connected to the surface of the door plate, and the guide wheels are slidably connected with the guide rails. The double-head motor drives the traction wheels to rotate, which drives the door plate to be pushed and pulled along the guide rails through the traction of the steel cable and the traction block. At the same time, the guide wheels roll along the guide rails to drive the cleaning wheels to clean the guide rails, and the surface of the door plate is wiped by the cleaning belt to remove the dirt accumulated on the surface, which can prevent the accumulation of sundries on the surface of the guide rails, affect the normal opening and closing of the door plate, prevent the corrosion and damage of the door plate caused by dirt, effectively prevent the isolation effect of the protection door on radiation, and greatly improve the safety of work.

An EMI shielding and acoustic attenuation door frame and door system, including: a door connected to a door frame with a hinge, the door including a bottom portion having a plate, a door gasket, a door sponge, and conductive tape for grounding the door; the door frame including: a jamb section including: a jamb main frame; a jamb back frame; wherein the jamb main frame and back frame being adjustable along the wall; a layered jamb gasket at least partially in between the door frame and the jamb main frame; a flanged magnetic jamb gasket fixed to an acoustical retainer with a fastener; wherein the door is grounded when the door is in a closed position against the door frame; a sill section including: a spreader bar having at least one sill gasket covered by a threshold, the spreader bar and at least one sill gasket contacting a floor shielding.

A radiation-proof air-tight door comprises an air-tight door body, the air-tight door body has a radiation-proof function and is installed on a wall, a through groove is formed in the wall, a lead screw is rotatably installed on the wall, a movable block is arranged on the periphery of the lead screw, a threaded groove is formed in the movable block, the threaded groove is in threaded connection with the lead screw, and a box body is fixedly installed on the periphery of the lead screw. A motor is fixedly installed in the box body, an output shaft of the motor and the lead screw are coaxial and fixedly connected, a strip-shaped through groove is formed in the box body, a first sliding block is installed in the strip-shaped through groove in a sliding mode, and a fixing block is arranged below the airtight door and fixedly installed on a wall. The air-tight door is simple in structure and ingenious in conception, the air-tight door can be opened electrically and can also be opened manually during power failure, it is guaranteed that people in the door can open the air-tight door to escape when dangerous situations occur during power failure, the possibility of casualties is reduced, operation is easy, actual requirements can be met, and the air-tight door is suitable for popularization.

The present application relates to a kind of anti-fragment penetration assembled electronic signal shielding room, construction method, the shielding room includes: multiple wallboard modules, each is sequentially fixedly connected with ceramic composite impact layer, ribbed steel plate bearing layer, honeycomb buffer layer and first electromagnetic shielding layer from outside to inside, multiple wallboard modules head-to-tail butt joint;Top plate module is at least provided with second electromagnetic shielding layer, and top plate module is adaptively butted with the top of multiple wallboard modules;Bottom plate module is at least provided with third electromagnetic shielding layer, and bottom plate module is adaptively butted with the bottom of multiple wallboard modules;Hydraulic locking mechanism is arranged at the butt joint of adjacent wallboard module, wallboard module and top plate module and wallboard module and bottom plate module;Multiple wallboard modules and top plate module and bottom plate module cooperatively form closed shielding room.The present application realizes the coordination of anti-fragment penetration protection, electromagnetic shielding integrity and quick assembly construction, improves the structural reliability and shielding stability in high-risk environment.

The invention provides a shielding door for a radio telescope, and belongs to the technical field of electrostatic shielding of radio telescopes, the shielding door comprises a door body, an escape window is formed in the center of the door body, and a driving groove is formed in one side of the door body; the number of the shielding steel plates is two; the shielding steel plates are inserted into the escape window, and a gap is formed between the two shielding steel plates; the windowing assembly is arranged in a gap between the two shielding steel plates; the window opening assembly comprises a first driving shaft rotationally connected to the inner wall of the escape window, a driving sleeve connected to the end of the first driving shaft in a threaded mode and a folding arm with the end hinged to the driving sleeve. One side of the first driving shaft is located in the driving groove; the two driving sleeves are arranged at the two ends of the first driving shaft correspondingly. When needed, the first driving shaft drives the two driving sleeves to be close to each other, so that the folding arms are folded, the joints of the folding arms can push out the two shielding steel plates from the escape window, and an escape channel is opened.

The utility model belongs to the technical field of shielding doors, and particularly relates to an anti-radiation shielding door which comprises an anti-radiation shielding door body, a door frame body is arranged on the outer side of the anti-radiation shielding door body, a door lock mechanism with a multi-point locking function is arranged in the anti-radiation shielding door body, and the door lock mechanism comprises a front shell. A mounting shell is arranged on one side of the front shell, a rear shell is arranged on one side of the mounting shell, a vertical locking mechanism capable of locking the anti-radiation shielding door body in the vertical direction is arranged in the mounting shell, and a transverse locking mechanism capable of locking the anti-radiation shielding door body in the transverse direction is arranged on one side of the rotating shaft. The multi-point locking device is reasonable in design, simple in structure, convenient to machine and capable of achieving multi-point locking of the door body by means of the linkage effect so as to ensure the stress uniformity of all the edges of the door leaf, reduce the possibility of gaps, guarantee use safety and meet use requirements.

The present invention provides a radiation shielding door that allows the shielding function to be changed by replacing the type of block, even after the door structure has been installed. [Solution] The radiation shielding door comprises a door frame provided in an opening Wa formed in a wall W, and a door body 2 that can open and close the opening Wa. The door body 2 has an opening surface that communicates with the internal space of the door body 2, and a plurality of blocks 23, 23, ... are inserted vertically into the internal space. The blocks 23, 23, ... have a radiation shielding function and can be inserted from the opening surface.

The utility model discloses a rotary radiation-proof door, which comprises a door frame and a radiation-proof door hinged on the door frame, the radiation-proof door comprises a fixed door and a rotary door, one side of the fixed door is hinged on the door frame, the other side of the fixed door is hinged with the rotary door, and both the fixed door and the rotary door are formed by clamping a lead plate by a door plate. During rolling, the thickness gauge works, the rotating lead door is closed at the moment, and radiation during working of the thickness gauge is prevented. When equipment accidents and production accidents need to be handled, the thickness gauge stops working, the anti-radiation lead door is opened through manual rotation in time, handling of the equipment accidents and the production accidents is not affected at a little, and the thickness gauge is very convenient and practical.

The utility model relates to the technical field of shielding doors, and discloses a radioactive source automatic shielding safety device which comprises a door frame, an upper cross beam fixedly installed at the upper end of the door frame, a plurality of fixing pieces fixedly installed on the front side of the upper cross beam, a track beam fixedly installed at the lower ends of the fixing pieces, and connecting plates fixedly installed on the front side and the rear side in the track beam respectively. Two guide seats are fixedly mounted on one side of the connecting plate, two sliding mechanisms are further movably mounted in the track beam, each sliding mechanism comprises a wheel seat, and two rotating shafts are rotatably mounted in the wheel seats. The shielding door can slide at the lower end of the track beam through two sliding mechanisms at the upper end to achieve opening and closing, and each sliding mechanism is composed of a wheel seat, a rotating shaft, a first rolling wheel, a second rolling wheel, a connecting rod and the like. The shield door horizontally moves by a certain distance towards the door frame direction after being closed by matching two groups of connecting plates and guide seats which are obliquely arranged on the opposite sides in the track beam, so that a gap at the joint of the shield door and the door frame is filled, and rays are prevented from escaping.

The utility model discloses a hospital radiation-proof door which comprises a radiation-proof door body, a groove is formed in the bottom wall of the radiation-proof door body, a radiation-proof block is connected in the groove in a sliding mode, a mounting groove is formed in the position, above the groove, of the radiation-proof door body, a mounting base is arranged in the mounting groove and is a rectangular cavity, and the radiation-proof block is connected with the mounting base in a sliding mode. A fixing seat is fixedly welded to the inner wall of the top side of the mounting seat, a push rod is slidably connected to the fixing seat, a fixing block is fixedly welded to the push rod, the push rod is sleeved with an elastic spring, and the two ends of the elastic spring are fixedly connected with the fixing seat and the fixing block respectively. According to the anti-radiation door, the installation base, the fixing base, the push rod, the fixing block, the elastic spring, the connecting rod and other parts are arranged on the anti-radiation door body in a matched mode, the effect that the anti-radiation block automatically moves downwards along with closing of the anti-radiation door body is achieved, no electric energy driving force is needed, and the use cost is reduced.

The utility model relates to the technical field of anti-radiation windows, in particular to an anti-radiation window convenient to disassemble and assemble, and solves the problem that anti-radiation glass is usually embedded in a window frame of a traditional anti-radiation window in the prior art and is fixed in a glue edge bonding or bolt fastening mode. The fixing mode is tedious in operation, the installation difficulty is increased, and the installation efficiency is reduced. When the anti-radiation window needs to be maintained or replaced, the dismounting process is also complicated, and the practicability of the anti-radiation window is reduced. An anti-radiation window convenient to disassemble and assemble comprises a window frame, a sealing groove is formed in the top of the window frame, anti-radiation glass is arranged in the window frame, and a sealing plate matched with the sealing groove is fixedly installed at the top of the anti-radiation glass. The anti-radiation window is convenient for personnel to operate, assemble and disassemble, the operation burden of the personnel is reduced, and the installation efficiency and practicability of the anti-radiation window are improved.

The utility model discloses an emergency hand-operated reinforced concrete single-leaf air-tight door which comprises a door frame and an air-tight door body, the air-tight door body is arranged inside the door frame, fixing blocks are symmetrically installed at the rear end of the air-tight door body, a rotating rod is arranged at the rear end of the door frame, the fixing blocks are fixedly connected to the outer surface of the rotating rod, and a large bevel gear is installed on the outer surface of the rotating rod. A rotating shaft is installed at the front end of the bevel pinion and rotationally connected with the door frame, a first gear is installed on the outer surface of the rotating shaft, a hand-cranking mechanism is arranged in the door frame, and a limiting mechanism is arranged above the hand-cranking mechanism and installed in the door frame. The sealing door body is driven by the hand rocker to rotate to be opened or closed, the labor-saving effect is improved through the long hand rocker, the labor-saving effect is achieved through cooperation of the small bevel gear and the large bevel gear, when the sealing door body is closed, the limiting block is driven by the rotating block to descend and be inserted into the limiting notch, and the position of the sealing door body is fixed. And convenience, rapidness, time saving and labor saving are achieved.

The invention provides an intelligent shielding structure for a radiotherapy machine room, and belongs to the technical field of medical radiation protection. A shielding door frame; the shielding door is connected into the shielding door frame in a sliding manner; physical closing and locking actions of the shielding door and opening and closing of the warning lamp are directly and rigidly linked through mechanical driving and hydraulic transmission mechanisms, the warning lamp needs to be lighted only when the shielding door moves to a completely-closed position and the locking mechanism and the oil pressure mechanism are triggered, and the warning lamp can be turned on or turned off. The process does not depend on any electronic signal or complex logic judgment which is prone to interference, and it is guaranteed that the lamp is turned on when the door is closed and is turned off when the door is opened from the physical principle. The problem of wrong warning caused by sensor misinformation, circuit fault or program error of the intelligent shielding structure warning lamp of the radiotherapy machine room in the prior art is solved.