215results about "Radiation protection" patented technology

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 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 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.

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 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 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 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 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 invention discloses a radiology department protective door system with an alarm function, relates to the technical field of radiation protective doors, and provides the following scheme that the radiology department protective door system comprises a protective door mechanism, a radiation alarm is arranged above the front side surface of the protective door mechanism, and a surrounding type metal detection mechanism is arranged on the rear side end face of the protective door mechanism. According to the technical scheme, the radiation alarm with the sound-light alarm function is arranged on the outer side of the protective door leaf, and the radiation quantity monitor is arranged on the inner side of the protective door leaf in a clamped mode, so that after the radiation quantity monitor monitors the radiation quantity in a radiation department, the radiation alarm provides sound-light alarm prompts for patients waiting outside the door; the patient outside the door is prevented from being affected by radiation; secondly, a tunnel leading to a radiology department room is designed on the rear side of the door frame, a surrounding type metal detection mechanism is arranged in the tunnel, and metal object detection is conducted on a shaft body before a patient enters radiation detection.

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 relates to the technical field of ray protection, in particular to a lead-free X and gamma ray protective door which comprises a door frame, a door frame and a composite protective plate, the door frame comprises two side plates, a top plate and a doorsill, one ends of the two side plates are fixedly connected with the two ends of the top plate respectively, and the other ends of the two side plates are fixedly connected with the two ends of the doorsill respectively. Composite protection blocks are fixedly embedded in the connecting positions of the side plates, the top plate and the doorsill. One ends of the upper edge and the lower edge of the door frame are rotationally connected with the top plate and the doorsill respectively; two transverse plates are arranged in the middle of the door frame to divide the door frame into a frame opening in the vertical direction, the frame opening is of a hollow structure, and the composite protection plates are arranged on the two faces of the frame opening. A containing opening is formed between the two transverse plates and used for containing a door lock, and baffles are arranged on the two faces of the containing opening respectively. According to the lead-free X-ray and gamma-ray protective door, the weight of the door body can be reduced, the requirement for the installation position is not high, and the installation difficulty is low.

The present invention relates to the field of shielding door processing technology, specifically a darkroom shielding door lock structure, including a door frame and a door body hinged on the door frame, and also including: a shielding locking mechanism, which is arranged between the door body and the door frame, including a shielding locking assembly and an arc-shaped spring leaf arranged in combination; the shielding locking assembly includes a locking shielding blade, a locking shielding clamp seat located on both sides of the locking shielding blade, and a driving assembly for driving the locking shielding clamp seat to move. The present invention can form a complete shielding structure by combining the shielding locking assembly with the arc-shaped spring leaf and the arc-shaped blade, thereby achieving effective electromagnetic shielding of the connection position between the door body and the door frame. At the same time, a locking shielding clamp seat that can be symmetrically opened and closed is provided in the shielding locking assembly. After the locking shielding clamp seat locks and clamps the locking shielding blade, it can have the effects of both a lock body and a shielding structure. After the locking shielding clamp seat expands outward to fully unlock the locking shielding blade, it can greatly reduce the resistance when the door body is opened.

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 invention discloses a door body assembly which is applied to cooking equipment and comprises a door body, a choke groove is formed in the inner surface of the door body, and the choke groove is provided with a linear choke groove linear section and an arc-shaped choke groove corner section; the choke plate and the choke groove form a choke structure; the outer periphery of the choke plate is provided with a linear choke straight line edge corresponding to the choke groove straight line section and a choke corner edge corresponding to the choke groove corner section, and the choke corner edge comprises a linear anti-leakage stable tangent main edge and two linear field cut-off cooperative control edges located on the two sides of the anti-leakage stable tangent main edge respectively. Included angles are formed between the anti-leakage stable tangent main edge and the two field cut-off cooperative control edges, and included angles are formed between the anti-leakage stable tangent main edge and the two adjacent choking linear edges. The invention further discloses the cooking equipment. The invention has the beneficial effects that the microwave leakage rate at the four corners can be effectively reduced, and the microwave leakage rate is within an ideal range of 0.4-1.2 wm / cm < 2 >.

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.

The shielding structure comprises a door frame, a left door plate and a right door plate are hinged to the two sides of the door frame respectively, a door handle is fixedly connected to the left side of the right door plate, a plurality of sets of air cylinder clamping mechanisms are fixedly connected to the upper side and the lower side of the door frame respectively, and each air cylinder clamping mechanism comprises an air cylinder. The air cylinders are fixed to the upper side and the lower side of the door frame, connecting rods are hinged to the output ends of the air cylinders, pressing plates are hinged to the other ends of the connecting rods, auxiliary blocks are hinged to the middles of the connecting rods, and the bottoms of the auxiliary blocks are fixedly connected with the door frame. The push-pull clamping mechanism comprises a push-pull base, the push-pull base is fixed to the middle of the left door plate, and a mounting base is fixedly arranged at the top of the outer surface of the push-pull base. The utility model has the characteristics that the beryllium copper reed abrasion can be solved, and the shielding function is perfected.