A shielding door for protecting against harmful radiation in a nuclear power plant

Abstract

The present invention discloses a shielding door for protecting against harmful radiation in a nuclear power plant, belonging to the technical field of shielding doors. The mobile mechanism of the shielding door in the nuclear power plant comprises a main door assembly, a track assembly, a door frame assembly and a sliding door assembly, wherein the track assembly is fixedly connected to the top of the door frame assembly, the track assembly and the door frame assembly are both fixedly buried in the wall, the sliding door assembly is slidably connected in the track assembly, the main door assembly is slidably connected in the door frame, the main door assembly is fixedly connected to the sliding door assembly, and the main door assembly is further provided with an inner door assembly and a locking assembly. The present invention can allow personnel and small equipment to enter and exit through the inner door assembly during normal use, reduce the frequent opening and closing of the main door assembly, and increase the service life of the shielding door. At the same time, both the main door assembly and the inner door assembly can be manually closed in an emergency state, effectively increasing the safety and reliability of the shielding door.

Description

Technical Field

[0001] The invention belongs to the technical field of shielding doors, and in particular relates to a shielding door for protecting against harmful radiation in a nuclear power plant. Background Art

[0002] The shielding doors in nuclear power plants are special doors that not only have all the functions of conventional doors, but also meet the unique safety and protection requirements of nuclear power plants. These doors are usually large and designed to protect key areas within the nuclear island, such as the reactor containment, to prevent radioactive materials from leaking into the environment and to ensure the safety of personnel and equipment. Shielding doors need to be very strong and reliable because they are an important part of the safety system.

[0003] Traditional shielding doors are usually designed to be relatively large to allow large equipment and vehicles to pass through. However, in daily use, most of the people who need to pass through are personnel and some small equipment. Since shielding doors are designed to be very heavy to ensure safety, frequent opening of shielding doors is not only troublesome, but also easily causes damage to the related auxiliary mechanisms of the shielding doors, affecting the defense effect of the shielding doors. At the same time, the safety and reliability of shielding doors is their primary goal, so the moving mechanism of the shielding door needs to ensure that the shielding door can be effectively closed in an emergency, thereby ensuring the safety of personnel and equipment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a shielding door for protecting against harmful radiation for use in nuclear power plants. The present invention can allow personnel and small equipment to enter and exit through the inner door assembly during normal use, reduce the frequent opening and closing of the main door assembly, increase the service life of the shielding door, and ensure the defensive effect of the shielding door. At the same time, both the main door assembly and the inner door assembly can be manually closed in an emergency, effectively increasing the safety and reliability of the shielding door, and when a fault occurs, maintenance personnel can inspect all components outside the door, effectively ensuring the safety of personnel and equipment.

[0005] The technical solution adopted to solve the above technical problems is: a shielding door for protecting against harmful radiation for a nuclear power plant, comprising a main door assembly, a track assembly, a door frame assembly and a sliding door assembly, wherein the track assembly is fixedly connected to the top of the door frame assembly, the track assembly and the door frame assembly are both fixedly buried in the wall, the sliding door assembly is slidably connected in the track assembly, the main door assembly is slidably connected in the door frame assembly, the main door assembly is fixedly connected to the sliding door assembly, and the main door assembly is also provided with an inner door assembly and a locking assembly;

[0006] The sliding door assembly can drive the main door assembly to slide horizontally on the track assembly, and the sliding door assembly can drive the main door assembly to open and close in the door frame assembly;

[0007] The inner door assembly is slidably connected to the main door assembly, and when the inner door assembly is closed, the locking assembly can lock the inner door assembly.

[0008] Through the above technical solution, when the main door assembly needs to be closed, the sliding door assembly drives the main door assembly to slide horizontally toward the door frame assembly. After moving to the door frame assembly, the sliding door assembly pushes the main door assembly into the door frame assembly, and the main door assembly is closed. The reverse operation can complete the opening of the main door assembly. During normal passage, it is only necessary to keep the main door assembly in a closed state, and open and close the inner door assembly to complete the passage of daily personnel and small equipment, reduce the frequent operation of the sliding door assembly, and increase the service life of the sliding door assembly. The locking assembly locks the inner door assembly to effectively ensure the sealing of the shielding door to prevent radioactive substances from leaking into the environment. In an emergency, the main door assembly and the inner door assembly can be manually closed, which effectively increases the safety and reliability of the shielding door, thereby ensuring the safety of personnel and equipment.

[0009] Furthermore, a plurality of lock tongue grooves are provided on the side of the main door assembly, and the door frame assembly includes an inspection plate and a lock tongue component, the lock tongue component is fixedly connected in the door frame assembly, the lock tongue on the lock tongue component is slidably connected to the lock tongue component, the lock tongue can be clamped in the lock tongue groove, and the inspection plate is fixedly connected to the front side of the door frame assembly.

[0010] Through the above technical solution, since the lock tongue component is fixedly connected in the door frame assembly, the lock tongue on the lock tongue component is slidably connected to the lock tongue component, the lock tongue can be stuck in the lock tongue groove, and the inspection plate is fixedly connected to the front side of the door frame assembly, so that after the main door assembly enters the door frame assembly, the lock tongue component can lock the main door assembly in the door frame assembly, effectively ensuring the sealing of the shielding door, and the provision of the inspection plate makes it possible that when a fault occurs, only the inspection plate needs to be opened, the door frame assembly can be opened, and effective inspection and maintenance can be carried out outside the door.

[0011] Furthermore, the track assembly includes a first track and a second track, the second track is fixedly arranged on the first track, a rack is arranged in the first track, and an avoidance groove is arranged between the first track and the second track.

[0012] Through the above technical solution, the arrangement of the first track and the second track on the track assembly facilitates the horizontal sliding of the sliding door assembly in the track assembly, thereby driving the horizontal sliding of the main door assembly.

[0013] Furthermore, the sliding door assembly includes a frame, a moving component, a door-pushing component and a driven roller, the moving component is fixedly connected to the rear end of the frame, the door-pushing component is slidably connected to the bottom of the frame, and the driven roller is rotatably connected to the rear end of the frame.

[0014] Through the above technical solution, since the moving part is fixedly connected to the rear end of the frame, the door pushing part is slidably connected to the bottom of the frame, and the driven roller is rotatably connected to the rear end of the frame, the moving part moves with the frame, which can drive the door pushing part to move and also drive the driven roller to roll.

[0015] Furthermore, a crossbeam is fixedly connected to the rear end of the frame, and the crossbeam extends into the first track. Driven rollers are rotatably connected to both sides of the crossbeam, and the driven rollers can roll in the first track. A motor bracket is fixedly connected to the top of the frame. The moving part includes a drive motor and a gear. The drive motor is fixedly connected to the motor bracket, and a gear is fixedly connected to the drive motor shaft. The gear is rotatably connected to the crossbeam. The drive motor is arranged in the second track, and the drive motor shaft passes through the avoidance groove, and the gear is meshed with the rack.

[0016] Through the above technical scheme, since the rear end of the frame is fixedly connected to a crossbeam, the crossbeam extends into the first track, and driven rollers are rotatably connected on both sides of the crossbeam, the driven rollers can roll in the first track, and a motor bracket is fixedly connected to the top of the frame. The moving parts include a driving motor and a gear. The driving motor is fixedly connected to the motor bracket, and a gear is fixedly connected to the driving motor shaft. The gear is rotatably connected to the crossbeam. The driving motor is arranged in the second track, and the driving motor shaft passes through the avoidance groove. The gear is meshed with the rack, so that the rotation of the driving motor can drive the gear to rotate, which can drive the frame to slide horizontally on the track assembly, and the driven rollers will also roll in the first track, thereby ensuring that the frame slides horizontally on the track assembly stably, and the horizontal sliding of the frame on the track assembly can drive the door sliding component to slide horizontally on the track assembly.

[0017] Furthermore, a slide groove is provided at the bottom of the frame, the pushing door component is slidably connected in the slide groove at the bottom of the frame, the front end of the pushing door component is fixedly connected to a hydraulic telescopic rod, the front end of the hydraulic telescopic rod is fixedly connected to the frame, and the bottom of the pushing door component is fixedly connected to the main door assembly.

[0018] Through the above technical scheme, since a sliding groove is provided at the bottom of the frame, the pushing door component is slidably connected in the sliding groove at the bottom of the frame, a hydraulic telescopic rod is fixedly connected to the front end of the pushing door component, the front end of the hydraulic telescopic rod is fixedly connected to the frame, and the bottom of the pushing door component is fixedly connected to the main door assembly, so that the pushing door component can slide back and forth at the bottom of the frame, and the setting of the hydraulic telescopic rod can push the pushing door component to slide back and forth at the bottom of the frame, thereby driving the main door assembly to slide back and forth on the frame.

[0019] Furthermore, the main door assembly is provided with a accommodating bin, the inner door assembly is slidably connected in the accommodating bin, a bin plate is fixedly connected to the front side of the accommodating bin, a door opening is provided on one side of the accommodating bin on the main door assembly, and the inner door assembly can block the door opening.

[0020] Through the above technical scheme, since the main door assembly is provided with a accommodating bin, the inner door assembly is slidably connected in the accommodating bin, a bin plate is fixedly connected to the front side of the accommodating bin, and a door opening is provided on one side of the accommodating bin on the main door assembly. The inner door assembly can block the door opening, so that the inner door assembly can complete the closure by blocking the door opening, and the inner door assembly can be opened by sliding into the accommodating bin. The accommodating bin can effectively protect the inner door assembly. The arrangement of the bin plate makes it possible for the accommodating bin to be opened when a fault occurs, so that the inner door assembly can be repaired outside the door conveniently.

[0021] Furthermore, the inner door assembly includes a first door panel and a second door panel, the second door panel is arranged on the front side of the first door panel, the front side of the first door panel is fixedly connected to a first connecting plate, the rear side of the second door panel is fixedly connected to a second connecting plate, a plurality of connecting rods are arranged between the first door panel and the second door panel, one end of the connecting rod is hinged on the first connecting plate, the other end of the connecting rod is hinged on the second connecting plate, a limiting column is arranged on the side of the second connecting plate away from the accommodating bin, a slope is arranged on the side of the door opening close to the accommodating bin, and the second door panel can slide into the door opening.

[0022] Through the above technical solution, since the front side of the first door panel is fixedly connected to the first connecting plate, and the rear side of the second door panel is fixedly connected to the second connecting plate, a plurality of connecting rods are arranged between the first door panel and the second door panel, one end of the connecting rod is hinged on the first connecting plate, and the other end of the connecting rod is hinged on the second connecting plate, so that when the inner door assembly is in an open state, the first door panel and the second door panel are fitted with each other and are located in the accommodating chamber. When the inner door assembly needs to be closed, the inner door assembly slides horizontally in the accommodating chamber toward the door opening, and the second door panel slides in front of the first door panel. After the second door panel touches the side wall of the door opening, the first door panel can continue to slide. At this time, the connecting rod is propped up to push the second door panel into the door opening, so that the second door panel can slide into the door opening. After the second door panel slides into the door opening, the connecting rod is just stuck by the limit column, and the inner door assembly is closed.

[0023] When the inner door assembly is in a closed state, the inner door assembly is slid toward the accommodating chamber, and the first door panel first slides toward the accommodating chamber, and then the connecting rod drives the second door panel to slide toward the accommodating chamber. A slope is provided on the side of the door opening close to the accommodating chamber, and a slope adapted to the same is provided on the edge of the second door panel, so that when the second door panel slides toward the accommodating chamber, the second door panel gradually approaches the first door panel, and finally, after both the first door panel and the second door panel enter the accommodating chamber, the first door panel and the second door panel fit each other, and the inner door assembly is opened.

[0024] Furthermore, a handle is fixedly connected to the rear side of the first door panel, and a through groove for accommodating the handle to pass through is provided on the compartment panel.

[0025] Through the above technical solution, since a handle is fixedly connected to the rear side of the first door panel and a through groove for accommodating the handle is provided on the compartment panel, pulling the handle can drive the first door panel to slide horizontally on the accommodating compartment, thereby completing the opening and closing of the inner door assembly.

[0026] Furthermore, a locking groove is provided on one side of the door opening of the main door assembly, and the locking assembly is slidably connected in the locking groove. The locking assembly includes a locking rod, a compression spring and a pressure plate. A plurality of compression springs are fixedly connected to the front side of the locking rod, and the front end of the compression spring is fixedly connected in the locking groove. A pressure plate is fixedly connected to one side of the locking rod. A card slot is provided on the front side of the first door panel near one end of the locking assembly, and the locking rod can be clamped in the card slot.

[0027] Through the above technical scheme, since multiple compression springs are fixedly connected to the front side of the locking rod, the front end of the compression spring is fixedly connected to the locking groove, a pressure plate is fixedly connected to one side of the locking rod, and a slot is provided on the front side of the first door panel near one end of the locking assembly. The locking rod can be clamped in the slot, so that the locking rod can slide back and forth in the locking slot. The setting of the compression spring can make the locking rod clamped in the slot when the locking rod is clamped in the slot, so that the locking assembly can lock the inner door assembly, effectively ensuring the sealing of the shielding door, and pressing the pressure plate can drive the locking rod to slide forward, so that the locking assembly releases the lock of the inner door assembly, facilitating the opening of the inner door assembly.

[0028] The beneficial effects of the present invention are as follows:

[0029] (1) In the present invention, during normal passage, it is only necessary to keep the main door assembly in a closed state, and to open and close the inner door assembly to complete passage. Pulling the handle can drive the first door panel to slide horizontally on the receiving compartment, so that the inner door assembly can be conveniently opened and closed, thereby reducing the frequent opening and closing of the main door assembly, increasing the service life of the shielding door, ensuring the defensive effect of the shielding door, reducing the maintenance frequency of the main door assembly, and effectively saving costs;

[0030] (2) When a fault occurs in the present invention, the door frame assembly can be opened by simply opening the inspection panel, which facilitates maintenance of the door frame assembly outside the door. The storage compartment can be opened by simply opening the compartment panel, which facilitates maintenance of the inner door assembly outside the door. The sliding door assembly is also outside the door, so that when a fault occurs, maintenance personnel can inspect all components outside the door, effectively ensuring the safety of personnel and equipment and improving the safety and reliability of the shielding door.

[0031] (3) In the present invention, under emergency conditions, the main door assembly is in a closed state for a long time, while the inner door assembly is manually opened and closed, so that the shielding door can be quickly closed. Even if the main door assembly is in an open state, the main door assembly can be manually pushed into the door frame assembly to complete the closure, thereby preventing radioactive substances from leaking into the environment and ensuring the safety of personnel and equipment, thereby effectively increasing the safety and reliability of the shielding door. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of a shielding door for protecting against harmful radiation in a nuclear power plant according to the present invention;

[0033] Figure 2 It is a structural schematic diagram of a track assembly and a door frame assembly of a shielding door for protecting against harmful radiation used in a nuclear power plant according to the present invention;

[0034] Figure 3 It is a schematic structural diagram of the cooperation of a main door assembly, an inner door assembly and a locking assembly of a shielding door for protecting against harmful radiation used in a nuclear power plant according to the present invention;

[0035] Figure 4 It is a structural schematic diagram of a track assembly of a shielding door for protecting against harmful radiation in a nuclear power plant according to the present invention;

[0036] Figure 5 It is a front view of a shielding door for protecting against harmful radiation used in a nuclear power plant according to the present invention;

[0037] Figure 6 It is a first-view structural schematic diagram of a sliding door assembly of a shielding door for protecting against harmful radiation in a nuclear power plant according to the present invention;

[0038] Figure 7 It is a second perspective structural schematic diagram of a sliding door assembly of a shielding door for protecting against harmful radiation in a nuclear power plant according to the present invention;

[0039] Figure 8 It is a schematic diagram of the exploded structure of a sliding door assembly of a shielding door for protecting against harmful radiation in a nuclear power plant according to the present invention;

[0040] Fig. 9 It is a structural schematic diagram of a main door assembly of a shielding door for protecting against harmful radiation in a nuclear power plant according to the present invention;

[0041] Fig.10 It is a schematic diagram of the exploded structure of an inner door assembly of a shielding door for protecting against harmful radiation in a nuclear power plant according to the present invention;

[0042] Fig.11 It is a structural schematic diagram of a first door panel of a shielding door for protecting against harmful radiation in a nuclear power plant according to the present invention;

[0043] Fig.12The invention is a schematic structural diagram of a locking assembly of a shielding door for protecting against harmful radiation in a nuclear power plant.

[0044] 1. The door assembly includes a first door panel, a second door panel, a second door panel, a second door frame, a second door stopper ... DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] like Figure 1 As shown, a shielding door for protecting against harmful radiation for a nuclear power plant comprises a main door assembly 1, a track assembly 2, a door frame assembly 3 and a sliding door assembly 4, wherein the track assembly 2 is fixedly connected to the top of the door frame assembly 3, the track assembly 2 and the door frame assembly 3 are both fixedly buried in the wall, the sliding door assembly 4 is slidably connected in the track assembly 2, the main door assembly 1 is slidably connected in the door frame assembly 3, the main door assembly 1 is fixedly connected to the sliding door assembly 4, and the main door assembly 1 is further provided with an inner door assembly 5 and a locking assembly 6;

[0047] The sliding door assembly 4 can drive the main door assembly 1 to slide horizontally on the track assembly 2, and the sliding door assembly 4 can drive the main door assembly 1 to open and close in the door frame assembly 3;

[0048] The inner door assembly 5 is slidably connected to the main door assembly 1 , and when the inner door assembly 5 is closed, the locking assembly 6 can lock the inner door assembly 5 .

[0049] In this embodiment, when the main door assembly 1 needs to be closed, the sliding door assembly 4 drives the main door assembly 1 to slide horizontally toward the door frame assembly 3. After moving to the door frame assembly 3, the sliding door assembly 4 pushes the main door assembly 1 into the door frame assembly 3, and the main door assembly 1 is closed. The reverse operation can complete the opening of the main door assembly 1. During normal passage, it is only necessary to keep the main door assembly 1 in a closed state, and open and close the inner door assembly 5 to complete the passage of daily personnel and small equipment, reduce the frequent operation of the sliding door assembly 4, and increase the service life of the sliding door assembly 4. The locking assembly 6 locks the inner door assembly 5, effectively ensuring the sealing of the shielding door to prevent radioactive substances from leaking into the environment. In an emergency, the main door assembly 1 and the inner door assembly 5 can be manually closed, which effectively increases the safety and reliability of the shielding door, thereby ensuring the safety of personnel and equipment.

[0050] like Figure 2 - Figure 3 As shown, a plurality of lock tongue grooves 11 are provided on the side of the main door assembly 1, and the door frame assembly 3 includes an inspection plate 31 and a lock tongue component 32, the lock tongue component 32 is fixedly connected in the door frame assembly 3, the lock tongue on the lock tongue component 32 is slidably connected to the lock tongue component 32, the lock tongue can be clamped in the lock tongue groove 11, and the inspection plate 31 is fixedly connected to the front side of the door frame assembly 3.

[0051] In this embodiment, after the main door assembly 1 enters the door frame assembly 3, the lock tongue component 32 can lock the main door assembly 1 in the door frame assembly 3, effectively ensuring the sealing of the shielding door, and the provision of the inspection panel 31 makes it possible that when a fault occurs, only the inspection panel 31 needs to be opened, and the door frame assembly 3 can be opened, so that effective inspection and maintenance can be carried out outside the door.

[0052] like Figure 2 - Figure 8 As shown, a plurality of lock tongue grooves 11 are provided on the side of the main door assembly 1, and the door frame assembly 3 includes an inspection plate 31 and a lock tongue component 32, the lock tongue component 32 is fixedly connected in the door frame assembly 3, the lock tongue on the lock tongue component 32 is slidably connected with the lock tongue component 32, the lock tongue can be clamped in the lock tongue groove 11, and the inspection plate 31 is fixedly connected to the front side of the door frame assembly 3;

[0053] The track assembly 2 includes a first track 21 and a second track 22. The second track 22 is fixedly arranged on the first track 21. A rack 211 is arranged in the first track 21. An avoidance groove 221 is arranged between the first track 21 and the second track 22.

[0054] The sliding door assembly 4 includes a frame 41, a moving component 42, a door-pushing component 43 and a driven roller 44. The moving component 42 is fixedly connected to the rear end of the frame 41, the door-pushing component 43 is slidably connected to the bottom of the frame 41, and the driven roller 44 is rotatably connected to the rear end of the frame 41.

[0055] A crossbeam 411 is fixedly connected to the rear end of the frame 41, and the crossbeam 411 extends into the first track 21. Driven rollers 44 are rotatably connected to both sides of the crossbeam 411, and the driven rollers 44 can roll in the first track 21. A motor bracket 412 is fixedly connected to the top of the frame 41. The moving component 42 includes a driving motor 421 and a gear 422. The driving motor 421 is fixedly connected to the motor bracket 412. A gear 422 is fixedly connected to the rotating shaft of the driving motor 421. The gear 422 is rotatably connected to the crossbeam 411. The driving motor 421 is arranged in the second track 22. The rotating shaft of the driving motor 421 passes through the avoidance groove 221, and the gear 422 is meshed with the rack 211.

[0056] A slide groove is provided at the bottom of the frame 41, and the door pushing component 43 is slidably connected in the slide groove at the bottom of the frame 41. The front end of the door pushing component 43 is fixedly connected to a hydraulic telescopic rod 431, and the front end of the hydraulic telescopic rod 431 is fixedly connected to the frame 41. The bottom of the door pushing component 43 is fixedly connected to the main door assembly 1.

[0057] In this embodiment, the driving motor 421 rotates to drive the gear 422 to rotate, and the gear 422 is rotatably connected to the crossbeam 411, and the gear 422 is meshed with the rack 211, which can drive the frame 41 to slide horizontally on the track assembly 2, and the driven roller 44 will also roll in the first track 21, thereby ensuring that the frame 41 slides horizontally on the track assembly 2 stably, and the frame 41 slides horizontally on the track assembly 2 to drive the door push component 43 to slide horizontally on the track assembly 2;

[0058] The door push component 43 can slide forward and backward at the bottom of the frame 41, and the hydraulic telescopic rod 431 can push the door push component 43 to slide forward and backward at the bottom of the frame 41, thereby driving the main door assembly 1 to slide forward and backward on the frame 41;

[0059] Finally, the sliding door assembly 4 drives the main door assembly 1 to slide horizontally toward the door frame assembly 3. After moving to the door frame assembly 3, the sliding door assembly 4 pushes the main door assembly 1 into the door frame assembly 3, and the main door assembly 1 is closed. The reverse operation can complete the opening of the main door assembly 1.

[0060] like Fig. 9 - Fig.11 As shown, the main door assembly 1 is provided with a storage bin 12, the inner door assembly 5 is slidably connected in the storage bin 12, a bin plate 121 is fixedly connected to the front side of the storage bin 12, a door opening is provided on one side of the storage bin 12 on the main door assembly 1, and the inner door assembly 5 can block the door opening;

[0061] The inner door assembly 5 includes a first door panel 51 and a second door panel 52. The second door panel 52 is arranged at the front side of the first door panel 51. The front side of the first door panel 51 is fixedly connected with a first connecting plate 511. The rear side of the second door panel 52 is fixedly connected with a second connecting plate 521. A plurality of connecting rods 53 are arranged between the first door panel 51 and the second door panel 52. One end of the connecting rod 53 is hinged on the first connecting plate 511. The other end of the connecting rod 53 is hinged on the second connecting plate 521. A limiting column 5211 is arranged on the side of the second connecting plate 521 away from the accommodating bin 12. A slope is arranged on the side of the door opening close to the accommodating bin 12. The second door panel 52 can slide into the door opening.

[0062] A handle is fixedly connected to the rear side of the first door panel 51 , and a through slot for accommodating the handle to pass through is provided on the compartment panel 121 .

[0063] In this embodiment, the inner door assembly 5 blocks the door opening to complete the closing, and when the inner door assembly 5 is opened, it can slide into the receiving bin 12. The receiving bin 12 can effectively protect the inner door assembly 5. The arrangement of the bin plate 121 makes it possible to open the receiving bin 12 when a fault occurs, so that the inner door assembly 5 can be easily repaired outside the door.

[0064] When the inner door assembly 5 is in the open state, the first door panel 51 and the second door panel 52 are attached to each other and are located in the accommodating chamber 12. When the inner door assembly 5 needs to be closed, the inner door assembly 5 slides horizontally in the accommodating chamber 12 toward the door opening, and the second door panel 52 slides in front of the first door panel 51. After the second door panel 52 touches the side wall of the door opening, the first door panel 51 can continue to slide. At this time, the connecting rod 53 is propped up to push the second door panel 52 into the door opening so that the second door panel 52 can slide into the door opening. After the second door panel 52 slides into the door opening, the connecting rod 53 is just stuck by the limiting column 5211, and the inner door assembly 5 is closed.

[0065] When the inner door assembly 5 is in a closed state, the inner door assembly 5 is slid toward the accommodating chamber 12, and the first door panel 51 first slides toward the accommodating chamber 12, and then the connecting rod 53 drives the second door panel 52 to slide toward the accommodating chamber 12. A slope is provided on the side of the door opening close to the accommodating chamber 12, and a slope adapted to the slope is provided on the edge of the second door panel 52, so that when the second door panel 52 slides toward the accommodating chamber 12, the second door panel 52 gradually approaches the first door panel 51. Finally, after both the first door panel 51 and the second door panel 52 enter the accommodating chamber 12, the first door panel 51 and the second door panel 52 fit each other, and the inner door assembly 5 is opened.

[0066] A handle is fixedly connected to the rear side of the first door panel 51, and a through groove for accommodating the handle is provided on the compartment plate 121, so that pulling the handle can drive the first door panel 51 to slide horizontally on the accommodating compartment 12, thereby completing the opening and closing of the inner door assembly 5.

[0067] like Fig. 9 as well as Fig.12 As shown, a locking groove 13 is provided on one side of the door opening of the main door assembly 1, and the locking assembly 6 is slidably connected in the locking groove 13. The locking assembly 6 includes a locking rod 61, a compression spring 62 and a pressure plate 63. A plurality of compression springs 62 are fixedly connected to the front side of the locking rod 61, and the front end of the compression spring 62 is fixedly connected in the locking groove 13. A pressure plate 63 is fixedly connected to one side of the locking rod 61. A slot 512 is provided on the front side of the first door panel 51 near one end of the locking assembly 6, and the locking rod 61 can be clamped in the slot 512.

[0068] In this embodiment, the locking rod 61 can slide back and forth in the locking groove 13. The setting of the compression spring 62 can make the locking rod 61 stuck in the slot 512 when the locking rod 61 is stuck in the slot 512, so that the locking assembly 6 can lock the inner door assembly 5, effectively ensuring the sealing of the shielding door, and pressing the pressure plate 63 can drive the locking rod 61 to slide forward, so that the locking assembly 6 releases the lock on the inner door assembly 5, facilitating the opening of the inner door assembly 5.

[0069] The working principle of this embodiment is as follows: when large equipment needs to enter or exit and the main door assembly 1 needs to be opened or closed, the driving motor 421 rotates to drive the gear 422 to rotate, and the gear 422 rotates and is connected to the crossbeam 411, and the gear 422 meshes with the rack 211, which can drive the frame 41 to slide horizontally on the track assembly 2, and the driven roller 44 will also roll in the first track 21, thereby ensuring that the frame 41 slides horizontally on the track assembly 2 stably, and the frame 41 slides horizontally on the track assembly 2, which can drive the door push component 43 to slide horizontally on the track assembly 2;

[0070] The door push component 43 can slide forward and backward at the bottom of the frame 41, and the hydraulic telescopic rod 431 can push the door push component 43 to slide forward and backward at the bottom of the frame 41, thereby driving the main door assembly 1 to slide forward and backward on the frame 41;

[0071] That is, the driving motor 421 can drive the main door assembly 1 to slide horizontally left and right, and the door-pushing component 43 can drive the main door assembly 1 to slide forward and backward, and finally the sliding door assembly 4 drives the main door assembly 1 to slide horizontally toward the door frame assembly 3. After moving to the door frame assembly 3, the sliding door assembly 4 pushes the main door assembly 1 into the door frame assembly 3, and the main door assembly 1 is closed. The reverse operation can complete the opening of the main door assembly 1.

[0072] In normal passage, the main door assembly 1 only needs to be kept in a closed state, and the inner door assembly 5 can be opened and closed to complete the passage. Pulling the handle can drive the first door panel 51 to slide horizontally on the receiving chamber 12, so that the inner door assembly 5 can be opened and closed conveniently.

[0073] When the inner door assembly 5 is in the open state, the first door panel 51 and the second door panel 52 are fitted with each other and are located in the accommodating chamber 12. When the inner door assembly 5 needs to be closed, the handle is pulled to drive the first door panel 51 to slide horizontally in the accommodating chamber 12 toward the door opening, and the second door panel 52 slides in front of the first door panel 51. After the second door panel 52 touches the side wall of the door opening, the first door panel 51 can continue to slide. At this time, the connecting rod 53 is propped up to push the second door panel 52 into the door opening so that the second door panel 52 can slide into the door opening. After the second door panel 52 slides into the door opening, the connecting rod 53 is just stuck by the limiting column 5211, and the inner door assembly 5 is closed. At this time, the first door panel 51 just slides onto the locking assembly 6, and the locking rod 61 is stuck in the slot 512. The compression spring 62 squeezes the locking rod 61 in the slot 512, so that the locking assembly 6 locks the inner door assembly 5.

[0074] When the inner door assembly 5 is in the closed state, pressing the pressure plate 63 can drive the locking rod 61 to slide forward, and the locking rod 61 disengages from the card slot 512, so that the locking assembly 6 releases the lock of the inner door assembly 5, and pulling the handle drives the first door panel 51 to slide in the direction of the accommodating chamber 12. The first door panel 51 first slides in the direction of the accommodating chamber 12, and then the connecting rod 53 drives the second door panel 52 to slide in the direction of the accommodating chamber 12. A slope is provided on the side of the door opening close to the accommodating chamber 12, and a slope adapted to the side of the second door panel 52 is provided on the edge of the second door panel 52, so that when the second door panel 52 slides in the direction of the accommodating chamber 12, the second door panel 52 gradually approaches the first door panel 51. Finally, after the first door panel 51 and the second door panel 52 both enter the accommodating chamber 12, the first door panel 51 and the second door panel 52 fit each other, and the inner door assembly 5 is opened.

[0075] The cooperation between the inner door assembly 5 and the locking assembly 6 not only has a fast opening and closing speed, but also effectively ensures that the inner door assembly 5 can be quickly closed in an emergency state. Moreover, all of them are manual mechanisms, which can ensure the stable operation of the inner door assembly 5 in an emergency state. At the same time, the cooperation between the inner door assembly 5 and the locking assembly 6 effectively ensures the airtightness of the inner door assembly 5 when it is closed, thereby improving the working efficiency of the shielding door and effectively improving the safety and stability of the shielding door.

[0076] Since the inner door assembly 5 includes a first door panel 51 and a second door panel 52, the first door panel 51 and the second door panel 52 cooperate so that when the inner door assembly 5 is closed, it has a double-layer defense effect, which effectively improves the defense effect of the shielding door, and the inner door assembly 5 can be conveniently opened and closed manually, so that the main door assembly 1 does not need to be opened and closed frequently, which effectively reduces the risk of nuclear radiation exposure when the main door assembly 1 is opened. At the same time, it effectively reduces the damage to the auxiliary components caused by the frequent opening and closing of the main door assembly 1, and the reduction of the sealing protection performance of the main door assembly 1, thereby effectively improving the defense effect of the shielding door.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A shielding door for protecting against harmful radiation in a nuclear power plant, comprising a main door assembly (1), a track assembly (2), a door frame assembly (3) and a sliding door assembly (4), characterized in that: The track assembly (2) is fixedly connected to the top of the door frame assembly (3); the track assembly (2) and the door frame assembly (3) are both fixedly embedded in the wall; the sliding door assembly (4) is slidably connected to the track assembly (2); the main door assembly (1) is slidably connected to the door frame assembly (3); the main door assembly (1) is fixedly connected to the sliding door assembly (4); and the main door assembly (1) is also provided with an inner door assembly (5) and a locking assembly (6); The sliding door assembly (4) can drive the main door assembly (1) to slide horizontally on the track assembly (2), and the sliding door assembly (4) can drive the main door assembly (1) to open and close inside the door frame assembly (3); The inner door assembly (5) is slidably connected to the main door assembly (1); when the inner door assembly (5) is closed, the locking assembly (6) can lock the inner door assembly (5); The main door assembly (1) is provided with a plurality of lock tongue grooves (11) on the side thereof; the door frame assembly (3) comprises an inspection plate (31) and a lock tongue component (32); the lock tongue component (32) is fixedly connected to the door frame assembly (3); a lock tongue on the lock tongue component (32) is slidably connected to the lock tongue component (32); the lock tongue can be clamped in the lock tongue groove (11); and the inspection plate (31) is fixedly connected to the front side of the door frame assembly (3); The track assembly (2) comprises a first track (21) and a second track (22); the second track (22) is fixedly arranged on the first track (21); a rack (211) is arranged in the first track (21); and an avoidance groove (221) is arranged between the first track (21) and the second track (22); The sliding door assembly (4) comprises a frame (41), a moving component (42), a door-pushing component (43) and a driven roller (44), wherein the moving component (42) is fixedly connected to the rear end of the frame (41), the door-pushing component (43) is slidably connected to the bottom of the frame (41), and the driven roller (44) is rotatably connected to the rear end of the frame (41); The rear end of the frame (41) is fixedly connected to a crossbeam (411), the crossbeam (411) extends into the first track (21), and driven rollers (44) are rotatably connected to both sides of the crossbeam (411), and the driven rollers (44) can roll in the first track (21). The top of the frame (41) is fixedly connected to a motor bracket (412), and the moving component (42) comprises a driving motor (421) and a gear (422), the driving motor (421) is fixedly connected to the motor bracket (412), a gear (422) is fixedly connected to the rotating shaft of the driving motor (421), and the gear (422) is rotatably connected to the crossbeam (411), the driving motor (421) is arranged in the second track (22), the rotating shaft of the driving motor (421) passes through the avoidance groove (221), and the gear (422) is meshed with the rack (211); A slide groove is provided at the bottom of the frame (41), the door push component (43) is slidably connected in the slide groove at the bottom of the frame (41), a hydraulic telescopic rod (431) is fixedly connected to the front end of the door push component (43), the front end of the hydraulic telescopic rod (431) is fixedly connected to the frame (41), and the bottom of the door push component (43) is fixedly connected to the main door assembly (1); The main door assembly (1) is provided with a storage bin (12), the inner door assembly (5) is slidably connected in the storage bin (12), a bin plate (121) is fixedly connected to the front side of the storage bin (12), a door opening is provided on one side of the storage bin (12) on the main door assembly (1), and the inner door assembly (5) is capable of blocking the door opening; The inner door assembly (5) comprises a first door panel (51) and a second door panel (52), wherein the second door panel (52) is arranged at the front side of the first door panel, the front side of the first door panel (51) is fixedly connected to a first connecting plate (511), and the rear side of the second door panel (52) is fixedly connected to a second connecting plate (521), a plurality of connecting rods (53) are arranged between the first door panel (51) and the second door panel (52), one end of the connecting rod (53) is hinged on the first connecting plate (511), and the other end of the connecting rod (53) is hinged on the second connecting plate (521), a limiting column (5211) is arranged on the side of the second connecting plate (521) away from the accommodating bin (12), and a slope is arranged on the side of the door opening close to the accommodating bin (12), so that the second door panel (52) can slide into the door opening.

2. A shielding door for protecting against harmful radiation in a nuclear power plant according to claim 1, characterized in that: A handle is fixedly connected to the rear side of the first door panel (51), and a through slot for accommodating the passage of the handle is provided on the compartment panel (121).

3. A shielding door for protecting against harmful radiation for use in a nuclear power plant according to claim 1, characterized in that: A locking groove (13) is provided on one side of the door opening of the main door assembly (1), and the locking assembly (6) is slidably connected in the locking groove (13). The locking assembly (6) comprises a locking rod (61), a compression spring (62) and a pressure plate (63). A plurality of compression springs (62) are fixedly connected to the front side of the locking rod (61), and the front end of the compression spring (62) is fixedly connected in the locking groove (13). A pressure plate (63) is fixedly connected to one side of the locking rod (61). A clamping groove (512) is provided on the front side of the first door panel (51) near one end of the locking assembly (6), and the locking rod (61) can be clamped in the clamping groove (512).

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