Nuclear medicine department radiation protection room integrating environment monitoring and automatic alarm functions

Abstract

The invention discloses a nuclear medicine department radiation protection room integrated with environment monitoring and automatic alarm functions, and relates to the technical field of radiation protection rooms, the nuclear medicine department radiation protection room comprises a protection room body, a cavity is arranged in the protection room body, a channel port is arranged at the front end of the protection room body, a moving groove is arranged at one end of the channel port, and the moving groove is communicated with the cavity. A radiation-proof door is slidably mounted in the moving groove, a driving assembly is mounted at the upper end of the radiation-proof door, radiation-proof layers are mounted in the protection chamber body and the radiation-proof door, a moving monitoring assembly is mounted on the upper portion in the cavity, and a plurality of radiation-proof plate assemblies are movably mounted at one end, below the moving monitoring assembly, in the cavity. And an air curtain machine is mounted outside the protection chamber body above the channel opening. The anti-radiation door and the air curtain machine are installed at the channel opening, when the anti-radiation door is opened, the air curtain machine generates an air curtain to form air wall protection on the channel opening, external air is prevented from entering the protection chamber body through the channel opening, and pollution to air in the protection chamber is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of radiation protection rooms, in particular to a nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions. Background Art

[0002] The Radiation Protection Room is a department affiliated to the General Technology Center. It is mainly responsible for implementing the national laws, regulations and standards on radiation safety, establishing and improving the institute's radiation safety management rules and regulations, conducting radiation protection related research, and providing technical support for the institute's radiation safety management. The Nuclear Medicine Department's Radiation Protection Room is generally used by the Radiology Department, mainly for the placement and use of the radiology department's equipment.

[0003] At present, when the radiation protection room is in use, people generally enter and exit through the protection door. During this process, the outside air will enter the radiation protection room through people and the opening and closing of the protection door, thereby polluting the environment inside the radiation protection room. At the same time, when the radiation protection room is irradiated, the radiation equipment is generally inspected by handheld detection instruments, which cannot automatically detect the radiation protection room and automatically alarm. Based on this, a nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions is proposed to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions, comprising a protection room body, a cavity arranged inside the protection room body, a passage opening arranged at the front end of the protection room body, a movable groove arranged at one end of the passage opening, a radiation-proof door slidably installed inside the movable groove, a driving assembly installed at the upper end of the radiation-proof door, radiation-proof layers installed inside the protection room body and the radiation-proof door, a mobile monitoring assembly installed above the inside of the cavity, a plurality of radiation-proof plate assemblies movably installed at one end of the inside of the cavity below the mobile monitoring assembly, and an air curtain installed outside the protection room body above the passage opening.

[0006] Preferably, the passage opening and the upper and lower ends of the movable groove are both provided with installation grooves, the upper and lower ends of the radiation protection door are both installed with T-shaped connecting blocks inside the installation grooves, guide plates are both installed inside the installation grooves in front and behind the T-shaped connecting blocks, and the opposite end surfaces of the guide plates are both provided with sliding grooves one, and the two ends of the T-shaped connecting block are respectively located inside the sliding groove one.

[0007] Preferably, the driving assembly includes a fixed rack, a driving gear and a driving motor. The upper end of the T-shaped connecting block is located inside the mounting groove and a fixed rack is installed therein. The driving motor is installed inside the cavity above the fixed rack through a mounting seat. The output end of the driving motor extends into the mounting groove. A driving gear is installed at the output end of the driving motor. The driving gear and the fixed rack are meshed with each other.

[0008] Preferably, a protective plate is installed at one end of the T-shaped connecting block below away from the movable groove, and a placement groove is installed at one end of the channel opening away from the movable groove. The protective plate is slidably installed inside the placement groove, and the upper end of the protective plate and the bottom end inside the cavity are in the same plane.

[0009] Preferably, the air curtain is provided with an air inlet and an air outlet, respectively, a slot body is arranged at one end of the passage opening away from the interior of the movable slot, a trigger switch is installed inside the slot body, and the trigger switch is electrically connected to the air curtain.

[0010] Preferably, the mobile monitoring component includes a support plate, a guide rail, a mobile cart, a radiation monitoring instrument and an alarm. The support plate is installed on the upper end of the cavity, two guide rails are installed on the upper end of the support plate, a mobile cart is placed on the guide rails, a radiation monitoring instrument is installed on the upper end of the mobile cart, and an alarm is installed on the upper end of the radiation monitoring instrument.

[0011] Preferably, the radiation protection plate assembly includes a radiation protection plate body, a connecting plate 1 and a connecting rod. The number of the radiation protection plate bodies is multiple, and a connecting plate 1 is installed on one side of the upper and lower ends of the radiation protection plate body, and a connecting rod is installed on the other side of the upper and lower ends of the radiation protection plate body. The connecting rods are respectively rotatably connected to the connecting plates 1 on the adjacent radiation protection plate bodies.

[0012] Preferably, fixed blocks are installed at the upper and lower parts of one end of the cavity below the mobile monitoring component, and the surface of one end of the fixed block is provided with two sliding grooves, and two moving blocks are slidably installed inside the two sliding grooves, and a mounting plate is commonly installed at one end of the two moving blocks, and connecting plates are installed at the upper and lower parts of one end of the mounting plate, and a connecting rod on the anti-radiation plate body is rotatably connected to the connecting plate.

[0013] Preferably, the radiation protection layer includes a lead-boron board layer and a radiation protection latex paint layer.

[0014] Preferably, a plurality of elastic springs are sequentially installed from top to bottom on the surface of one end of the movable groove away from the radiation protection door, and a buffer plate is commonly installed on one end of the plurality of elastic springs.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The radiation protection room of the nuclear medicine department with integrated environmental monitoring and automatic alarm functions is equipped with radiation protection doors and wind curtain machines at the passageway. When the radiation protection doors are opened, the wind curtain machines generate wind curtains to form wind wall protection for the passageway, preventing external air from entering the protection room through the passageway and contaminating the air inside the protection room.

[0017] 2. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions is equipped with a mobile monitoring component. The mobile cart drives the radiation monitoring instrument to circulate inside the radiation protection room. When the detected conducted radiation intensity exceeds the limit, the alarm is controlled to sound an alarm to monitor the radiation intensity, which is convenient for staff to discover and deal with it in time.

[0018] 3. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions is equipped with radiation protection panel components. The radiation protection panels can protect multiple radiological equipment placed inside the protection room to avoid affecting the health of the staff inside the protection room. Multiple radiation protection panels can be formed into various shapes to protect the radiological equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a side sectional view of the present invention;

[0021] Figure 3 It is a cross-sectional view of the radiation protection door of the present invention;

[0022] Figure 4 For the present invention Figure 2 The enlarged view of point A in the middle;

[0023] Figure 5 It is a schematic structural diagram of the radiation protection plate assembly of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the mobile monitoring component of the present invention;

[0025] Figure 7 It is a schematic diagram of the internal structure of the radiation protection door of the present invention.

[0026] In the figure: 1. protection room body; 2. cavity; 3. passage opening; 4. moving groove; 5. radiation protection door; 10. installation groove; 11. T-type connecting block; 12. guide plate; 13. sliding groove one; 14. protection plate; 15. placement groove; 16. air outlet; 17. groove body; 18. trigger switch; 19. fixed block; 20. sliding groove two; 21. moving block; 22. installation plate; 23. connecting plate two; 24. air inlet; 25. air curtain machine; 26. elastic spring; 27. buffer plate; 601. fixed rack; 602. driving gear; 701. lead boron plate layer; 702. radiation protection latex paint layer; 801. supporting plate; 802. guide track; 803. moving trolley; 804. radiation monitoring instrument; 805. alarm; 901. radiation protection board body; 902. connecting plate one; 903. connecting rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] like Figures 1 to 7As shown, the nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions in this embodiment includes a protection room body 1, which is equipped with corresponding settings and windows (not shown in the figure), a cavity 2 is arranged inside the protection room body 1, and the cavity 2 is used to place radiology equipment. A passage opening 3 is arranged at the front end of the protection room body 1, and the passage opening 3 is arranged for personnel and carts to pass through. A movable groove 4 is arranged at one end of the passage opening 3, and the movable groove 4 provides space for the movement of a radiation proof door 5. When the passage opening 3 is opened, the radiation proof door 5 is located inside the movable groove 4, and the radiation proof door 5 is slidably installed inside the movable groove 4. The radiation proof door 5 and the protection room body 1 can protect the radiation generated by the radiology equipment. A driving component is installed on the upper end of the radiation proof door 5, and the driving component is used to drive the radiation proof door 5 to realize the movement of the radiation proof door 5. The protection room body 1 and the radiation proof door 5 are all installed with radiation protection layers, which are used to block the radiation generated by the radiological equipment to prevent the radiation from leaking out of the protection room. A mobile monitoring component is installed above the cavity 2, which is used to detect the radiation intensity inside the protection room body 1 to achieve mobile monitoring. Several radiation protection plate components are movably installed at one end of the cavity 2 below the mobile monitoring component. The radiation protection plate components are used to shield the radiological equipment to avoid affecting the physical and mental health of the personnel inside the protection room body 1. An air curtain machine 25 is installed outside the protection room body 1 above the passage opening 3. The air curtain machine 25 generates a downward wind curtain at the passage opening 3. The air curtain can prevent external air from entering the cavity 2 of the protection room body 1 to avoid air crossover. The air curtain machine 25 is intelligently controlled. When the radiation protection door 5 is opened, the air curtain machine 25 is started, and when the radiation protection door 5 is closed, the air curtain machine 25 is closed.

[0030] Specifically, installation grooves 10 are arranged at the upper and lower ends of the passage opening 3 and the movable groove 4, and T-shaped connecting blocks 11 are installed at the upper and lower ends of the radiation-proof door 5 in the installation grooves 10. Guide plates 12 are installed in the installation grooves 10 in front and behind the T-shaped connecting block 11, and sliding grooves 13 are arranged on the opposite end surfaces of the guide plate 12. Both ends of the T-shaped connecting block 11 are respectively located in the sliding grooves 13. When the radiation-proof door 5 moves, the T-shaped connecting blocks 11 at the upper and lower ends of the radiation-proof door 5 move in the sliding grooves 13 on the guide plates 12, thereby guiding the movement of the radiation-proof door 5 and achieving smooth movement of the radiation-proof door 5.

[0031] Furthermore, the driving component includes a fixed rack 601, a driving gear 602 and a driving motor. The upper end of the T-shaped connecting block 11 is located inside the mounting groove 10 and a fixed rack 601 is installed therein. The driving motor is installed inside the cavity 2 above the fixed rack 601 through a mounting seat. The output end of the driving motor extends into the mounting groove 10. A driving gear 602 is installed at the output end of the driving motor. The driving gear 602 and the fixed rack 601 are meshed with each other. The driving gear 602 is driven by the driving motor to rotate. When the driving gear 602 rotates, it drives the fixed rack 601 to move. The fixed rack 601 drives the radiation-proof door 5 to move, thereby driving the radiation-proof door 5. The driving motor is connected to a forward and reverse circuit, which can drive the radiation-proof door 5 to move in two directions.

[0032] Furthermore, a protective plate 14 is installed at one end of the lower T-shaped connecting block 11 away from the movable groove 4, and a placement groove 15 is installed at one end of the passage opening 3 away from the movable groove 4. The protective plate 14 is slidably installed inside the placement groove 15, and the upper end of the protective plate 14 and the bottom end of the cavity 2 are in the same plane. When the radiation protection door 5 is opened, the protective plate 14 is used to protect the lower installation groove 10 to prevent debris from entering the installation groove 10, thereby facilitating the passage of vehicles and personnel.

[0033] Furthermore, the air curtain machine 25 is respectively provided with an air inlet 24 and an air outlet 16, and a slot body 17 is arranged at one end of the passage opening 3 away from the interior of the movable slot 4. A trigger switch 18 is installed inside the slot body 17. The trigger switch 18 and the air curtain machine 25 are electrically connected. When the radiation protection door 5 is closed, the radiation protection door 5 presses the trigger switch 18, and the trigger switch 18 controls the air curtain machine 25 to stop working. When the radiation protection door 5 is opened, the trigger switch 18 controls the air curtain machine 25 to start working, thereby realizing automatic control of the air curtain machine 25.

[0034] Furthermore, the mobile monitoring component includes a supporting plate 801, a guide rail 802, a mobile cart 803, a radiation monitoring instrument 804 and an alarm 805. The supporting plate 801 is installed at the upper end of the cavity 2, and two guide rails 802 are installed at the upper end of the supporting plate 801. A mobile cart 803 is placed on the guide rails 802. A radiation monitoring instrument 804 is installed at the upper end of the mobile cart 803, and an alarm 805 is installed at the upper end of the radiation monitoring instrument 804. By using the mobile cart 803 to move on the guide rail 802, the mobile cart 803 drives the radiation monitoring instrument 804 to perform mobile monitoring, thereby realizing mobile monitoring of the radiation intensity inside the protection room body 1. When the radiation intensity is detected to be too strong, the alarm 805 sounds an alarm to remind the staff to deal with it in time. The mobile cart 803 is powered by a lithium battery. The mobile cart 803 can move cyclically on the guide rail 802, and the battery of the mobile cart 803 only needs to be replaced regularly.

[0035] Furthermore, the radiation protection panel assembly includes a radiation protection panel body 901, a connecting plate 902 and a connecting rod 903. There are multiple radiation protection panel bodies 901. Connecting plates 902 are installed on one side of the upper and lower ends of the radiation protection panel body 901, and connecting rods 903 are installed on the other side of the upper and lower ends of the radiation protection panel body 901. The connecting rods 903 are rotatably connected to the connecting plates 902 on adjacent radiation protection panel bodies 901 respectively. Multiple radiation protection panel bodies 901 can be rotated and bent to form an accommodating space. The equipment of the radiology department is placed in the space surrounded by multiple radiation protection panel bodies 901, thereby realizing the first layer of protection against radiation generated by the radiology equipment and avoiding affecting the physical and mental health of internal staff.

[0036] Furthermore, fixed blocks 19 are installed at the upper and lower parts of one end of the cavity 2 below the mobile monitoring component, and sliding grooves 20 are arranged on the surface of one end of the fixed block 19. Two moving blocks 21 are slidably installed inside the sliding grooves 20. A mounting plate 22 is commonly installed at one end of the two moving blocks 21, and connecting plates 23 are installed at the upper and lower parts of one end of the mounting plate 22. A connecting rod 903 on the radiation protection board body 901 is rotatably connected to the connecting plate 23. By moving the mounting plate 22, the mounting plate 22 moves inside the sliding groove 20 through the moving block 21, and the position of the radiation protection board body 901 can be adjusted, so that the appropriate protection position of the radiation protection board body 901 can be selected according to the position of the radiological equipment.

[0037] Furthermore, the radiation protection layer includes a lead-boron plate layer 701 and an anti-radiation latex paint layer 702. The lead-boron plate layer 701 is an effective radiation protection material that can block various types of radiation, such as X-rays and Y-rays. The radiation protection latex paint layer 702 mainly consists of nano-silver, zinc oxide, titanium dioxide, etc. It has excellent radiation protection and sterilization and disinfection functions, and can protect against radiation generated by radiological equipment and avoid radiation leakage.

[0038] Furthermore, a plurality of elastic springs 26 are installed in sequence from top to bottom on the surface of one end of the movable groove 4 away from the radiation proof door 5, and a buffer plate 27 is installed at one end of the plurality of elastic springs 26. When the radiation proof door 5 is closed, the radiation proof door 5 and the buffer plate 27 are in contact, and the buffer plate 27 compresses the elastic springs 26 to buffer the movement of the radiation proof door 5. Specifically, a rubber pad can be installed on the buffer plate 27 to reduce the collision between the radiation proof door 5 and the buffer plate 27.

[0039] The method of using this embodiment is as follows: the radiology equipment is placed inside the cavity 2 inside the protection room body 1, and the radiation protection board body 901 is used to protect and shield the radiology equipment. At the same time, the lead boron plate layer 701 inside the protection room body 1 and the radiation protection door 5 is an effective radiation protection material that can block various types of radiation, such as X-rays and rays. The radiation protection latex paint layer 702 has excellent radiation protection and sterilization functions, thereby achieving dual protection against radiation. When personnel need to enter and exit the protection room body 1, the driving motor is controlled to drive the driving gear 602 to rotate, and the driving gear 602 drives the fixed rack 601 on the radiation protection door 5 to move. The T-shaped connecting block 11 on the radiation protection door 5 slides in the sliding groove 13 inside the guide plate 12 to achieve the movement and opening of the radiation protection door 5. In this process, In the process, the radiation protection door 5 does not squeeze the trigger switch 18, and the trigger switch 18 controls the wind curtain machine 25 to work. The wind curtain machine 25 forms a wind wall at the opened passage 3, and the wind wall forms a barrier to prevent external air from entering the outside of the protection room body 1. When the radiation protection door 5 needs to be closed, the drive motor is controlled to rotate in the opposite direction, so that the radiation protection door 5 moves in the opposite direction to press the trigger switch 18. The trigger switch 18 controls the wind curtain machine 25 to stop working, thereby realizing automatic control of the wind curtain machine 25. At the same time, the mobile trolley 803 moves on the guide rail 802, and the mobile trolley 803 drives the radiation monitoring instrument 804 to perform mobile monitoring to realize the monitoring of the radiation intensity inside the protection room body 1. When the radiation intensity is detected to be too strong, the alarm 805 sounds an alarm to remind the staff to deal with it in time to avoid excessive radiation intensity.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions, comprising a protection room body (1), characterized in that: The protection room body (1) is provided with a cavity (2) inside, the protection room body (1) is provided with a passage opening (3) at the front end, a movable groove (4) is provided at one end of the passage opening (3), a radiation protection door (5) is slidably installed inside the movable groove (4), a driving component is installed at the upper end of the radiation protection door (5), radiation protection layers are installed inside the protection room body (1) and the radiation protection door (5), a mobile monitoring component is installed above the cavity (2), a plurality of radiation protection plate components are movably installed at one end of the cavity (2) below the mobile monitoring component, and an air curtain machine (25) is installed outside the protection room body (1) above the passage opening (3).

2. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions according to claim 1 is characterized by: The passage opening (3) and the movable groove (4) are both provided with mounting grooves (10) at the upper and lower ends thereof; the radiation protection door (5) is provided with T-shaped connecting blocks (11) at the upper and lower ends thereof, and guide plates (12) are both provided inside the mounting grooves (10) at the front and rear ends of the T-shaped connecting block (11); the guide plates (12) are both provided with sliding grooves (13) on the opposite end surfaces thereof; and the two ends of the T-shaped connecting block (11) are respectively located inside the sliding grooves (13).

3. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions according to claim 2 is characterized by: The driving assembly comprises a fixed rack (601), a driving gear (602) and a driving motor; the upper end of the T-shaped connecting block (11) is located inside the mounting groove (10) and is provided with a fixed rack (601); the driving motor is provided inside the cavity (2) above the fixed rack (601) via a mounting seat; the output end of the driving motor extends into the mounting groove (10); the output end of the driving motor is provided with a driving gear (602); and the driving gear (602) and the fixed rack (601) are meshed with each other.

4. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions according to claim 1 is characterized by: A protective plate (14) is installed at one end of the T-shaped connecting block (11) at the bottom away from the movable groove (4), and a placement groove (15) is installed at one end of the passage opening (3) away from the movable groove (4). The protective plate (14) is slidably installed inside the placement groove (15), and the upper end of the protective plate (14) and the bottom end inside the cavity (2) are in the same plane.

5. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions according to claim 1 is characterized by: The air curtain machine (25) is respectively provided with an air inlet (24) and an air outlet (16); a groove body (17) is arranged at one end of the passage opening (3) away from the inside of the movable groove (4); a trigger switch (18) is installed inside the groove body (17); and the trigger switch (18) and the air curtain machine (25) are electrically connected.

6. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions according to claim 1 is characterized by: The mobile monitoring component comprises a supporting plate (801), a guide rail (802), a mobile trolley (803), a radiation monitoring instrument (804) and an alarm (805); the supporting plate (801) is installed at the upper end of the cavity (2); two guide rails (802) are installed at the upper end of the supporting plate (801); a mobile trolley (803) is placed on the guide rails (802); a radiation monitoring instrument (804) is installed at the upper end of the mobile trolley (803); and an alarm (805) is installed at the upper end of the radiation monitoring instrument (804).

7. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions according to claim 1 is characterized by: The radiation protection plate assembly comprises a radiation protection plate body (901), a connecting plate one (902) and a connecting rod (903). The number of the radiation protection plate bodies (901) is multiple, and the connecting plate one (902) is installed on one side of the upper and lower ends of the radiation protection plate body (901), and the connecting rod (903) is installed on the other side of the upper and lower ends of the radiation protection plate body (901). The connecting rod (903) is rotatably connected to the connecting plate one (902) on the adjacent radiation protection plate body (901).

8. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions according to claim 7 is characterized by: A fixed block (19) is installed at both the upper and lower sides of one end of the cavity (2) below the mobile monitoring component, and a second sliding groove (20) is arranged on the surface of one end of the fixed block (19). Two moving blocks (21) are slidably installed inside the second sliding groove (20), and a mounting plate (22) is installed at one end of the two moving blocks (21). A second connecting plate (23) is installed at both the upper and lower sides of one end of the mounting plate (22), and a connecting rod (903) on the radiation protection plate body (901) is rotatably connected to the second connecting plate (23).

9. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions according to claim 1 is characterized by: The radiation protection layer comprises a lead-boron plate layer (701) and a radiation protection latex paint layer (702).

10. The nuclear medicine radiation protection room with integrated environmental monitoring and automatic alarm functions according to claim 1, characterized in that: A plurality of elastic springs (26) are sequentially installed from top to bottom on the surface of one end of the movable groove (4) away from the radiation protection door (5), and a buffer plate (27) is commonly installed at one end of the plurality of elastic springs (26).

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