183results about "Peep-holes" patented technology

Pet door inserts including a base panel system and an adjustment panel system. The base panel system includes a first and second base panels, a pet door, and a track. The pet door moveably mounts to the first base panel within a pet door opening and selectively covers the pet door opening. The second base panel is coupled to the first base panel along a first lateral side of the second base panel. The track extends longitudinally along a medial portion of the second base panel. The adjustment panel system is moveably mounted on the track and translates relative to the base panel system. The adjustment panel system includes a first adjustment panel defining a horizontal groove extending longitudinally along a medial portion of the first adjustment panel. The horizontal groove selectively receives the track to selectively mount the adjustment panel system to the base panel system.

The invention relates to the technical field of constant temperature and humidity, in particular to a sealing door structure and constant temperature and humidity equipment, and aims to solve the problem that the internal temperature and humidity precision and stability of a constant temperature and humidity box are affected due to attenuation of the sealing performance of a door body. In order to achieve the purpose, the sealing door structure comprises an inner door, an outer door and a sealing assembly. The inner door comprises a first inner door body and a second inner door body which can be opened and closed relatively, and a first butt joint seam is formed between the first inner door body and the second inner door body; the outer door is arranged on the outer side of the inner door and comprises a first outer door body and a second outer door body which can be oppositely opened and closed, and a second butt joint seam is formed between the first outer door body and the second outer door body; the sealing assembly comprises a first sealing mechanism arranged at the first butt joint seam and a second sealing mechanism arranged at the second butt joint seam. Through the design of the inner door and the outer door and the arrangement of the sealing assembly at the butt joint seam, a plurality of sealing defense lines are formed, so that leakage of air and water vapor is prevented, and the sealing performance of the box body is improved.

The utility model discloses a cardiovascular and cerebrovascular disease patient defecation safety guarantee door, which comprises a toilet door and a locking mechanism, the toilet door is provided with an emergency window, the side surface of the emergency window is provided with a rotating shaft, the rotating shaft is rotatably provided with a state prompting disc, the state prompting disc is provided with an emergency opening corresponding to the emergency window, and the locking mechanism is arranged on the locking mechanism. The peripheral surface of the state prompting disc is connected with a swing rod and a balancing weight arranged on the swing rod, and the swing rod is connected with a damping mechanism and an alarm module; when the swing rod swings to the position under the state prompting disc, the emergency window and the emergency opening are located at the coinciding position. According to the utility model, the emergency condition of a patient during defecation can be found in time, and the toilet door can be opened from the outside without damage, so that the safety of the patient during defecation is guaranteed.

The utility model provides a stainless steel purification door which comprises a door body, a groove is formed in the upper side of the door body, tempered glass is fixedly installed in the groove, a shielding mechanism is arranged at the position, located on one side of the tempered glass, in the door body, and a purification mechanism is arranged in the bottom of the door body; and the shielding mechanism comprises a mounting groove, the mounting groove is formed in the upper surface of the groove, a fixing cover is fixedly mounted in the mounting groove, fixing boxes are fixedly mounted on the inner walls of the two sides of the fixing cover, a winding shaft is rotationally connected between the two fixing boxes, and a shielding curtain is fixedly mounted on the outer surface of the winding shaft. Through the use of the shielding mechanism, the risk of privacy disclosure caused by a traditional transparent observation window is effectively solved. The shielding curtain is of a retractable structure, medical staff can quickly obtain the view field by pulling down the curtain body when needing to observe, stable shielding is achieved through a clamping structure in a non-use state, and the privacy or sensitive operation scenes of a patient are prevented from being exposed to a public area.

The present application aims to provide a kind of coal mine underground damping type regulating air door and its using method, belong to coal mine underground ventilation technical field, including air door body, the window frame is equipped on the air door body, the outer end of air door body is equipped with shell, one end of window frame is hinged with air door body by hinge, the other end is connected with shell by window lock, a plurality of layers of damping net are equipped between window frame and shell, the outside of damping net is equipped with inner frame body, the upper and lower ends of window frame are equipped with slide rail, the slide rail includes the outer slide rail located in the outside of air door body and the inner slide rail located in the inside of air door body, the inner frame body is slidably connected with slide rail, the bottom of the inner frame body is equipped with control assembly.Damping type regulating air door, air flow area is large, and is flexible to block, air flow is not easy to penetrate to the coal body around air door, the probability of coal spontaneous combustion accident is greatly reduced, and the air volume regulating range is large, especially suitable for the area that air volume changes greatly.

The utility model discloses a fixing frame for visual observation glass in cleaning equipment, belongs to the technical field of cleaning equipment, and aims to solve the problem that the cleaning efficiency is influenced as the cleaning equipment is not provided with an observation window and the cleaning process cannot be monitored in real time. The first window frame is arranged on the outer side wall of the outer door plate, window frame glass is arranged in an interlayer between the first window frame and the outer door plate, the second window frame is arranged on the inner side wall of the outer door plate, a plurality of fixing holes are formed in the second window frame at equal intervals, and the rectangular frame is fixedly arranged on the inner wall of the outer door plate. According to the fixing frame of the visual observation glass in the cleaning equipment, multiple times of installation, maintenance and disassembly are convenient, the downtime is shortened, the overall operation efficiency of the equipment is improved, meanwhile, the first window frame and the second window frame are matched for installation design, fixation is firm, water and gas leakage are prevented, the inner ring and the outer ring are designed into multiple layers of damping cotton, the damping effect is good, and the glass is not prone to breakage.

The utility model discloses a steel fireproof door convenient to observe, which relates to the technical field of fireproof doors and comprises a door frame, a window cover plate, a buffer column, a first door plate and a spring, the window cover plate is fixedly connected above the center line of the door frame, and the first door plate and a second door plate are arranged below the door frame. A window cover plate, a limiting block, explosion-proof glass, a hydraulic connecting rod, a limiting bolt and a spring are arranged above the center line of the first door plate, and a buffer column, a protective baffle and a spring are arranged below the center line of the first door plate. The acting force at the two ends can be balanced through the sleeved spring, meanwhile, the protective baffle can be moved towards the two ends, opening of the opening is achieved, and firefighters can conveniently put out flames in a blocked area.

The utility model discloses a hard fast rolling door oval spiral track which comprises door heads, two stand columns are arranged on the lower surfaces of the door heads in a spaced mode, the two kinds of door heads are arranged transversely and vertically, heat preservation door plates are rotationally connected into the transversely-arranged door heads and the vertically-arranged door heads in an oval mode, and the heat preservation door plates are arranged on the lower surfaces of the two stand columns in an oval mode. Motors are arranged in the transversely-arranged door head and the vertically-arranged door head, connecting shafts are rotationally connected to the transversely-arranged door head and the vertically-arranged door head, chain wheels are arranged outside the connecting shafts and the output ends of the motors, chains are arranged outside the two chain wheels, rotating rods are arranged at the other ends of the connecting shafts, and the rotating rods are connected with the connecting shafts. The exterior of the rotating rod is attached to the side wall of the heat preservation door plate. By means of the structure, the door head can be arranged in the transverse direction or the vertical direction, rotation can be conveniently conducted according to installation conditions when the roller shutter door is installed, and the practicability of the roller shutter door can be improved.

The application belongs to the technical field of electrical cabinets, and particularly relates to a door plate with a glass window and an electrical cabinet, which comprises a door plate body and glass, the door plate body is provided with an observation window, and the glass is arranged on the observation window; the top and bottom of the door plate body are provided with folded edges, each of the folded edges is separately provided with a baffle and surrounds a mouth-shaped closed structure, the baffle is provided with a transversely-arranged cutout for the glass to pass through, and the two ends of the cutout abut against the glass, the cutout is penetrated by a horizontal strip and fixedly connected with the baffle, the horizontal strip has two folded edges, one of which abuts against the door plate body, and the other abuts against the glass, and the folded edge of the horizontal strip at the bottom, which abuts against the door plate body, also abuts against the glass; the application can realize the limiting of the left and right and lower parts of the glass and the pressing of the edges of the glass.

The invention discloses an ALC internal partition wall fireproof door which comprises a door frame, an ALC fireproof door body and an observation window. A fireproof plate is movably arranged on one side of the ALC fireproof door body and detachably installed through a connecting hole. A water guide groove is formed in the fireproof plate, and a water swelling strip is embedded in the bottom of the fireproof plate; a water spraying component is movably mounted on the fireproof plate and comprises a water tank, a water pump, a water spraying plate, an atomizing nozzle and a connecting lug plate; a temperature sensor is arranged on the fireproof plate and used for triggering the water spraying component to work. Through the modular design of the detachable fireproof plate and the water spraying component, a double-layer fireproof structure is formed on the basis of a traditional ALC fireproof door, the temperature sensor triggers the atomization nozzle to conduct spraying cooling when encountering high temperature, and the water guide groove guides water flow to enable the water swelling strip to seal a gap; and the observation window is compositely fixed by fireproof glass and sealant, so that the combination of active fire prevention and passive flame retardance is realized, local replacement of damaged parts is facilitated, the fire endurance is remarkably improved, and the maintenance cost is reduced.

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.

The utility model discloses a fireproof door built-in alarm structure which comprises a mounting frame, a fireproof door body is rotationally connected into the mounting frame, a mounting groove is formed in the outer side of the mounting frame, an alarm mechanism is arranged at the top of the mounting frame, and the alarm mechanism comprises a patrol assembly and a power assembly. And the patrol assembly and the power assembly are used in cooperation, the patrol assembly comprises an avoiding groove, the avoiding groove is formed in one side of the top of the mounting frame, and the rotating rack is connected with the half gear in an engaged mode. According to the built-in alarm structure of the fireproof door disclosed by the utility model, the alarm mechanism is arranged, so that fire early warning can be carried out in a larger range, and meanwhile, an alarm can be actively given to surrounding people at the first time when a fire occurs, so that people can find the fire at the first time and evacuate; the life and property loss of people is greatly reduced, the structure is simple, and the practicability is high.

The utility model relates to the technical field of fireproof wooden doors, and discloses a fireproof wooden door with an observation function, which comprises a main body mechanism and an auxiliary fireproof mechanism, the auxiliary fireproof mechanism is positioned on the inner side of the main body mechanism, and the main body mechanism comprises a protective frame, a fixed base, a connecting seat, a fireproof wooden door main body and a door handle. According to the fireproof wooden door with the observation function, through the use of the main body mechanism, the fireproof wooden door main body in the middle of the inner side of the fireproof wooden door main body is fixed through the protective frame when the fireproof wooden door is used, so that the fireproof wooden door is firmer and more durable, and the protective frame is conveniently mounted and fixed through the fixed base and the connecting base; the fireproof wooden door body is opened by pulling the door handle, the connecting hinges are arranged on the inner side of the fireproof wooden door body so that the fireproof wooden door body can be opened more conveniently, the fireproof glass window is fixed through the fixing frame, and the fireproof wooden door body is opened or closed by pulling the push-pull plates in the middles of the fixing sliding grooves in the upper side and the lower side of the fixing frame on the inner side of the fireproof wooden door body. And observation and use are performed through the fireproof glass window.

The utility model relates to the technical field of fireproof doors, and provides a steel fireproof door convenient to observe, which comprises a fireproof door main body and a cleaning and cooling mechanism. Through the arrangement of the air pump, the air pipe and the air nozzle, after the monitoring assembly detects smoke dust, the air pump works, air is conveyed to the air nozzle through the air pipe to be sprayed out, impurities attached to the surface of the observation window are cleaned, and it is avoided that observation on the interior is affected; the flue gas is filtered by the filter screen to remove impurities, so that the air pump and the air nozzle are prevented from being blocked by the impurities in the air, and the operation stability of the device is improved; according to the fireproof door, the electromagnetic valve and the cooling guide pipe are arranged, the fire hose is connected with the electromagnetic valve, after the monitoring assembly detects the high temperature of the fireproof door body, the electromagnetic valve is opened, water is fed into the cooling guide pipe, the fireproof door body is cooled, and the situation that opening is affected by the high temperature of the fireproof door body is avoided.

The application discloses a laboratory air conditioning system clean door structure and relates to the field of clean doors, which comprises a door frame assembly, a rectangular groove is formed in the bottom of the door frame assembly, a sealing assembly is arranged in the rectangular groove, the sealing assembly comprises a bottom plate, limit columns are symmetrically fixed to the top of the bottom plate, lifting blocks are movably penetrated through the two limit columns, a top plate is fixed to the top end of the two limit columns, compression springs A are arranged on the outer circumferential surfaces of the two limit columns and abut against the top plate and the lifting blocks at two ends, a rubber pad is fixed to the top end of the top plate and abuts against the bottom of a door plate assembly, the rubber pad is tightly abutted against the bottom of the door plate assembly when the door is closed through the elastic force of the compression spring A, dust, microorganisms and other pollutants are effectively prevented from entering the laboratory, the indoor clean environment is ensured, meanwhile, the height of the sealing assembly can be adjusted through the rotating threaded column, different door plate assemblies or sealing requirements can be adapted, related components can be removed for repair and replacement, and maintenance is convenient.

The utility model relates to a fireproof door leaf which comprises a door leaf body, a first panel covering and connected to the rear side of the door leaf body and a second panel covering and connected to the front side of the door leaf body, and the door leaf body comprises a door leaf frame and a door leaf core plate embedded in the door leaf frame. The door leaf frame comprises a rectangular frame formed by connecting four door leaf frames arranged along the four edges of the fireproof door leaf. Each of the four door leaf frames comprises a first wooden frame and two first inorganic fireproof plates with the length extending in the length direction of the first wooden frame, and the two first inorganic fireproof plates are connected to the front side and the rear side of the first wooden frame respectively. According to the fireproof door leaf, the door leaf frame and the window frame are reasonably arranged, the structural stability of the fireproof door leaf is improved, and meanwhile it can be guaranteed that the fireproof door leaf has the good fireproof performance, the light weight level and the cost control level.

The utility model discloses a high-strength watertight chamber door for a cabin, which belongs to the technical field of ships and comprises a chamber door frame fixed on a cabin body and a cabin door assembly with the left side rotatably mounted on the chamber door frame through a plurality of hinges. The cabin door assembly comprises a front cabin cover located on the front side, a rear cabin cover detachably installed on the rear side of the front cabin cover and a lock fixedly installed between the front cabin cover and the rear cabin cover. A plurality of movable plug pins which are simultaneously distributed on the top side, the right side and the bottom side of the rear hatch cover are further installed between the front hatch cover and the rear hatch cover, and every two adjacent movable plug pins are in synchronous transmission through a connecting rod. According to the scheme, on the basis that only a lock is used for locking the cabin door traditionally, the multiple movable bolts distributed on the different sides of the cabin door are added, all the movable bolts can be assembled on the room door frame at the same time under transmission of the connecting rods, so that the cabin door structure is strengthened, the strength of the closed cabin door is higher, and the service life of the cabin door is prolonged. And the cabin door is not easy to generate abnormal sound when the ship sails.

The utility model provides an airtight fireproof door which comprises a connecting door frame, sliding assemblies are fixedly connected to the bottom and the top of the inner wall of the connecting door frame, a fireproof door body is slidably connected to the inner walls of the sliding assemblies, and adaptive sliding blocks are fixedly connected to the inner wall of the fireproof door body. The shape of the adaptive sliding block is matched with the inner wall of the sliding assembly, the sliding assembly can be in linkage with the fireproof door body and the adaptive sliding block through the structure of the sliding assembly, sliding of the fireproof door is helped, meanwhile, dust is prevented from being accumulated at the bottom and in the fireproof door body, and the functionality of the device is further improved; the sealing fixing groove can be in linkage with the sealing assembly, the sealing performance is kept in the door closing process through the internal size of the sealing fixing groove and the internal structure of the sealing assembly, and dust accumulation on the inner wall of the sealing fixing groove can be prevented through the structure of the sealing assembly when the opening and closing fireproof door body is closed. Therefore, the overall functionality and safety of the device are further improved.

The low-temperature steel door with the sealing structure comprises a low-temperature steel door body and a door frame, a sealing gasket is fixedly connected to the inner side of the door frame and arranged between the door frame and the low-temperature steel door body in an attached mode, and a connecting mechanism is arranged at the upper end of the low-temperature steel door body. The connecting mechanism is composed of a supporting rail, a rubber sealing baffle and a movable block in a combined mode, a through groove is formed in the rear end of the rubber sealing baffle, and the platen forms an overturning structure on the front side of the lower end of the low-temperature steel door body. According to the low-temperature steel door with the sealing structure, the sealing gasket is arranged between the low-temperature steel door body and the door frame in an attached mode, the sealing performance is guaranteed, when a worker enters a refrigeration house, if the low-temperature steel door body is accidentally closed, the rubber sealing baffle can be downwards moved to be opened in the interior, and call for help and communication can be better conducted to the outside through the through groove; and the situation that collected signals are damaged and cannot be connected with the outside world in closed air can be prevented.

The steel door comprises a door frame and a door leaf, a mounting round hole is formed in the middle of the door leaf, the visual window is mounted in the mounting round hole, the visual window comprises a glass window outer frame and a glass window inner frame, glass is arranged on the inner side of the glass window outer frame, a round hole is formed in the center of the glass, and the glass window inner frame is arranged in the round hole in a butt joint mode. A driving shaft rotating relative to the glass inner frame is arranged at a center hole of the glass inner frame, cleaning plates are symmetrically arranged on the two sides of the driving shaft and rotate along with the driving shaft, and detachable cleaning cotton is arranged on the sides, right facing the glass, of the cleaning plates. The cleaning plates are symmetrically arranged on the two sides of the driving shaft, the cleaning plates rotate along with the driving shaft, detachable cleaning cotton is arranged on the sides, right facing glass, of the cleaning plates, the driving shaft is rotated, the cleaning plates rotate along with the driving shaft, the cleaning cotton on the cleaning plates cleans the surfaces of the two sides of the glass, cleaning operation is easy and convenient, a pure mechanical structure is adopted, and the cleaning effect is good. The structure is simple, using cost is low, and application and popularization are facilitated.

The utility model relates to the technical field of anti-theft doors, in particular to a T-shaped anti-theft door which comprises a door leaf, a ventilation opening is formed in the door leaf, a ventilation window is connected to the inner wall of the ventilation opening in a sliding mode, a plurality of V-shaped blades are connected to the inner wall of the ventilation window in a rotating mode, gears are fixedly connected to the tops of the V-shaped blades, and racks are meshed with the tooth roots of the gears. One electric telescopic rod is started to drive the electric telescopic rod to extend to abut against the rack to move horizontally, drive the gear to rotate, drive the V-shaped blades to rotate uniformly and reduce the ventilation area between the adjacent blades, and the other electric telescopic rod is started to drive the electric telescopic rod to extend to abut against the rack to move horizontally in the reverse direction, drive the gear to rotate in the reverse direction and drive the V-shaped blades to rotate in the reverse direction. The ventilation area between the adjacent blades can be increased, the ventilation quantity within a certain time is controlled by adjusting and controlling the ventilation area of the ventilation opening, meanwhile, the adjacent V-shaped blades can always shield the straight line sight line, and privacy is guaranteed while the requirement of a user for accurately adjusting the ventilation quantity is met.

The utility model discloses a platform half-height type shielding door which comprises a base, supporting columns are installed on the two sides of the upper end of the base, a fence is installed on the outer sides of the supporting columns, a glass window is installed in the fence, a sliding groove is formed in the upper end of the base, and a two-way lead screw is rotatably installed in the base. One end of the bidirectional lead screw is installed at the front end of the motor, the motor is fixedly installed in the base through bolts, the sliding blocks are installed on the two sides of the upper end of the bidirectional lead screw, the shielding door is installed at the upper ends of the sliding blocks, the glass window is installed on the upper side of the shielding door, the upper end of the shielding door is installed in the sliding groove in a sliding mode, and the shielding door penetrates through the supporting column. A dustproof assembly is arranged on the upper side of the sliding groove, one end of the dustproof assembly is fixedly connected with the sliding block, the dustproof assembly is arranged in the groove, dust is prevented from entering the groove, and the service life of the bidirectional lead screw is prolonged.

To provide a door scope cover that can accommodate various protrusion dimensions.SOLUTION: A cylindrical body 20 to surround the peephole outer edge of a door scope can extend and contract in the central axis direction of the cylindrical body 20. Thereby, a door scope cover 10 can be used with a door scope 1 that can accommodate various protrusion dimensions.SELECTED DRAWING: Figure 4

The utility model relates to the field of fireproof doors, in particular to a visible steel fireproof door with explosion-proof glass, which comprises a single door and a door frame, the single door is rotatably mounted on the door frame, an observation window is arranged on the single door, a shell is arranged on one side of the observation window, a fixing frame is arranged between the shell and the single door, and the explosion-proof glass is arranged on the fixing frame. According to the door cleaning device, the rotating shaft, the gear, the teeth, the fixing frame and other parts are arranged, in the using process, the rotating shaft part, the gear part and the teeth are matched with one another, the rotating shaft part is adjusted to rotate, the rotating shaft drives the gear to rotate, and therefore the cleaning effect is achieved. The gear pushes the fixing frame to move through the teeth, and the fixing frame drives the first cleaning plate and the second cleaning plate to move along with the fixing frame, so that the effect of cleaning the surface of the other side of the observation window on one side of the single door is achieved, and the situation that the sight is blurred due to particles, and people observe the conditions inside and outside the single door is affected is avoided.

This utility model relates to the field of airtight door technology and discloses an airtight door suitable for a high-pressure oxygen chamber. It includes an airtight door body with a baffle frame integrally installed on its outer wall, a sealing mechanism located on the outside of the airtight door body, and an adjustment mechanism located on one side of the airtight door body. By pressing the button, a moving plate is driven to compress an elastic element. The moving plate moves a locking pin out of a locking hole, pushing a circular plate, which in turn moves a fixed rod and a piston. The piston pushes the gas inside the fixed shell through a connecting pipe to the sealing airbag. The sealing airbag further seals the airtight door, improving the sealing quality. Loosening the button pushes the elastic element to move the moving plate and locking pin into the locking hole to fix the circular plate. Through the multiple locking holes, the amount of gas entering the sealing airbag can be flexibly adjusted according to the pressure inside the chamber, thus adjusting the sealing performance of the sealing airbag and improving the flexibility and practicality of the device.

The invention relates to a household appliance having a housing and a door unit. A control unit and an accommodating container are arranged in the shell. A device opening is provided in the housing through which the receiving container can be accessed. The door unit is arranged on the household appliance in such a way that the appliance opening can be closed. The door unit includes a front door assembly and a rear door assembly. The front door assembly includes a first frame element. A window element is arranged between the front door assembly and the rear door assembly. The front door assembly at least partially overlaps the window element. The door unit includes a lighting unit disposed between the front door assembly and the rear door assembly within the door unit. The first frame element is at least partially light-transmissive and has a mask which has an opening and is arranged on the first frame element such that a first region of the first frame element is non-light-transmissive and a second region of the first frame element is light-transmissive. In an on state of the illumination unit, it transmits and illuminates the opening of the mask. The masked first frame element is arranged on the door unit in an edge region of the window element so as to at least partially overlap the window element.

The utility model belongs to the technical field of indoor decoration, and particularly relates to a novel observation window which comprises an inner gland and an outer gland with holes in the middle, an installation space is formed between the inner gland and the outer gland and can be used for installing a glass sheet, and a plurality of first connecting parts and second connecting parts are annularly arranged on the edges of the inner gland and the outer gland. The first connecting part and the second connecting part on the inner gland correspond to the second connecting part and the first connecting part on the outer gland in position respectively, the edge of the glass sheet abuts against the first connecting part or the second connecting part, a threaded hole and a through hole are formed in the first connecting part and the second connecting part respectively, a threaded rod is arranged in the through hole, and the threaded rod is connected with the threaded rod. The bottom end of the threaded rod penetrates through the threaded hole to be in threaded connection with the first connecting part, the structure is simple, no adhesive is needed when the observation window is installed on the door body, after the observation window is installed on the door body, the door body can be used in the first time, and the door body cannot generate formaldehyde due to the adhesive.

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 discloses a tightly connected security door which comprises a security door body and a security door frame, a rubber side pad is fixedly connected between the peripheries of an inner cavity of the security door frame, and a second arc-shaped rubber pad is fixedly connected between the peripheries of an inner cavity of the rubber side pad. A sealing frame is fixedly connected between the periphery of an inner cavity of the anti-theft door frame and located behind the rubber side pad, and a communicating pipe is fixedly connected between the surface of the sealing frame and the surface of the rubber side pad. Through the arrangement of the sealing frame, the first arc-shaped rubber pad, the second arc-shaped rubber pad and the rubber side pad, in the locking process between the anti-theft door body and the anti-theft door frame, effective multiple sealing can be conducted on the seam between the anti-theft door body and the anti-theft door frame, the phenomenon that a gap exists between the anti-theft door body and the anti-theft door frame is effectively avoided, and the service life of the anti-theft door body and the anti-theft door frame is prolonged. The anti-theft door body and the anti-theft door frame can be tightly connected, and the sound insulation and sealing performance between the anti-theft door body and the anti-theft door frame is effectively improved.