Shielding protection device and ray detection equipment

Abstract

The utility model provides a shielding protection device and ray detection equipment, and relates to the technical field of radiation shielding equipment. The shielding protection device comprises a protective cover and a track, the track is used for being installed on a workbench where the pressure container is located, the protective cover is installed on the track and faces a welding pipeline opening in the outer wall of the pressure container, and the protective cover is used for walking along the track and covering the outer wall of the pressure container. The welding pipeline is matched with the outer wall of the pressure container to form a containing cavity, and the welding seam of the welding pipeline and the pressure container is located in the containing cavity. According to the shielding protection device, the protective cover capable of moving through the track is matched with the outer wall of the pressure container to define the shielding type containing cavity for containing the weld joint, normal ray shielding detection is guaranteed, a water pressure pit is not needed for ray shielding detection of the weld joint, the time of the water pressure pit for ray shielding detection of the weld joint is effectively shortened, and the detection efficiency is improved. And improvement of the overall manufacturing efficiency is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of radiation shielding equipment, in particular to a shielding protection device and ray detection equipment. Background Art

[0002] In the field of nuclear power and petrochemical technology, during the processing of pressure vessels, the piping structure on the outside of the pressure vessels is installed and connected by welding. After the welding process is completed, the pressure vessels need to meet the needs of radiation shielding to avoid radiation leakage. Therefore, it is necessary to perform radiation detection on the welds of the pressure vessels.

[0003] Radiation shielding is required when performing radiographic inspection on the welds of pressure vessels. Currently, this method is achieved by placing the pressure vessel in a hydraulic pit and covering it with lead plates on the ground for overall shielding. However, this overall shielding method requires occupying the hydraulic pit for a long time, which hinders other manufacturing processes that require the use of the hydraulic pit and is not conducive to improving the overall manufacturing efficiency. Utility Model Content

[0004] The problem solved by the utility model is how to reduce the use time of the hydraulic pit during the radiation shielding detection of the welds while realizing the shielding of the welds of the pressure vessel and the pipeline structure to meet the radiation detection needs of the welds.

[0005] In order to solve the above problems, the utility model provides a shielding and protective device, including a protective cover and a track, the track is used to be installed on a workbench where a pressure vessel is located, the protective cover is installed on the track and is arranged toward the welding pipeline opening on the outer wall of the pressure vessel, the protective cover is used to run along the track and cover the outer wall of the pressure vessel to cooperate with the outer wall of the pressure vessel to form a accommodating cavity, and the weld between the welding pipeline and the pressure vessel is located in the accommodating cavity.

[0006] Compared with the prior art, the beneficial effects of the shielding and protection device of the utility model include: a shielding and protection device is formed by setting a shield and a track, wherein the track can be installed on a workbench where the pressure vessel is located, and the shield can be installed on the track, at this time, the shield can run along the track, and the shield opening faces the welding pipeline on the outer wall of the pressure vessel, so that when the shield runs along the track, the shield can be covered on the outer wall of the pressure vessel and cooperate with the outer wall of the pressure vessel to form a receiving cavity, so that the welding pipeline and the weld of the pressure vessel are located in the receiving cavity, and the radiation detection structure can be placed in the receiving cavity The radiation emitted by the radiation detection structure is shielded by a protective cover to perform on-site radiation radiation protection, thereby ensuring the safety of radiation shielding detection at welds. The radiation emitted by the radiation detection structure can also be irradiated at the welds of the welding pipeline and the pressure vessel located in the accommodating cavity, thereby ensuring the normal progress of radiation shielding detection at the welds. As a result, there is no need to use a hydraulic pit to perform radiation shielding detection at the welds, effectively reducing the time that the hydraulic pit is used for radiation shielding detection at the welds, so that the hydraulic pit can be more used in other manufacturing processes that require the use of a hydraulic pit, which is beneficial to improving the overall manufacturing efficiency.

[0007] Optionally, a plurality of the welding pipelines are circumferentially spaced apart on the pressure vessel, and the track is arranged in a ring shape around the circumference of the pressure vessel. When the protective cover moves along the track and separates from the pressure vessel, the protective cover is used to move along the track from one welding pipeline to another welding pipeline.

[0008] Optionally, there are two protective covers, and the two protective covers are evenly spaced apart along the circumference of the pressure vessel.

[0009] Optionally, the opening edge of the protective cover is arranged in an arc shape and matches the contour shape of the outer wall of the pressure vessel. When the protective cover is arranged on the outer wall of the pressure vessel, the opening edge of the protective cover fits the outer wall of the pressure vessel.

[0010] Optionally, an entrance and an exit are provided on the end surface of the protective cover away from the opening end thereof, and a protective door is movably installed at the entrance and an exit;

[0011] And / or, the wall panel of the protective cover includes a first inner layer and a first outer layer, the first outer layer is arranged to cover the first inner layer, the first inner layer is a lead layer, and the first outer layer is a steel layer.

[0012] Optionally, the shielding and protection device further comprises a protection room, wherein the protection room is installed on the track and is spaced apart from the protection cover along the circumference of the pressure vessel.

[0013] Optionally, the protective room is used to move along the track and approach or move away from the protective cover along the circumference of the pressure vessel;

[0014] And / or, the wall panels of the protective room include a second inner layer and a second outer layer, the second outer layer is arranged to cover the second inner layer, the second inner layer is a lead layer, and the second outer layer is a steel layer.

[0015] Optionally, the track includes a radial track, a radial running wheel is rotatably mounted on the protective cover, the radial track is extended radially along the pressure vessel, the radial running wheel is mounted on the radial track, and the protective cover moves along the radial track through the radial running wheel to cover or move away from the outer wall of the pressure vessel.

[0016] Optionally, the track also includes a circular track, a moving platform and a circular running wheel. The circumferential track is arranged in a ring shape along the circumference of the pressure vessel and is installed on the workbench. The circumferential running wheel is rotatably installed on the moving platform and is installed on the circumferential track. The moving platform moves along the circular track through the circumferential running wheel, and the radial track is installed on the moving platform.

[0017] On the other hand, the utility model also provides a radiation detection device, including the shielding protection device as described above.

[0018] Compared with the prior art, the beneficial effects of the radiation detection equipment of the present invention are the same as those of the shielding protection device described above, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a shielding protection device from one perspective in an embodiment of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the shielding protection device from another perspective in an embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 1-protective cover; 11-protective door; 2-track; 21-radial track; 22-circumferential track; 23-moving platform; 3-pressure vessel; 31-welding pipeline; 4-workbench; 5-protective room. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] It should be noted that, in the coordinate system XYZ provided in this article, the positive direction of the X axis represents the right, the negative direction of the X axis represents the left, the positive direction of the Y axis represents the front, the negative direction of the Y axis represents the back, the positive direction of the Z axis represents the top, and the negative direction of the Z axis represents the bottom.

[0025] On the one hand, an embodiment of the utility model provides a shielding and protective device, including a protective cover 1 and a track 2, the track 2 is used to be installed on a workbench 4 where a pressure vessel 3 is located, the protective cover 1 is installed on the track 2, and is arranged with an opening toward a welding pipeline 31 on the outer wall of the pressure vessel 3, the protective cover 1 is used to run along the track 2 and be covered on the outer wall of the pressure vessel 3 to cooperate with the outer wall of the pressure vessel 3 to form a accommodating cavity, and the weld between the welding pipeline 31 and the pressure vessel 3 is located in the accommodating cavity.

[0026] In this embodiment, if Figure 1 A shielding protection device is formed by setting a protective cover 1 and a track 2, wherein the track 2 can be installed on a workbench 4 where a pressure vessel 3 is located, and the protective cover 1 can be installed on the track 2. At this time, the protective cover 1 can move along the track 2, and the opening of the protective cover 1 faces the welding pipeline 31 on the outer wall of the pressure vessel 3. In this way, when the protective cover 1 moves along the track 2, the protective cover 1 can be covered on the outer wall of the pressure vessel 3 and cooperate with the outer wall of the pressure vessel 3 to form a receiving cavity, so that the welding pipeline 31 and the weld of the pressure vessel 3 are located in the receiving cavity. At this time, the radiation detection structure can be placed in the receiving cavity, and the protective cover 1 can be placed on the outer wall of the pressure vessel 3 to form a receiving cavity. The cover 1 shields the rays emitted by the radiation detection structure, performs on-site radiation protection, and ensures the safety of radiation shielding detection at the weld. The rays emitted by the radiation detection structure can also be irradiated at the welds of the welding pipeline 31 and the pressure vessel 3 located in the accommodating cavity, thereby ensuring the normal implementation of the radiation shielding detection at the weld. As a result, there is no need to use a hydraulic pit to perform radiation shielding detection at the weld, effectively reducing the time the hydraulic pit is used for radiation shielding detection at the weld, so that the hydraulic pit can be more used in other manufacturing processes that require the use of a hydraulic pit, which is beneficial to improving the overall manufacturing efficiency.

[0027] It should be noted that, in this embodiment, Figure 2 As shown, the workbench 4 is arranged in a ring shape around the opening direction of the pressure vessel 3, and the welding pipeline 31 on the outer wall of the pressure vessel 3 is located above the workbench 4, and the track 2 is located on the workbench 4 and below the welding pipeline 31, so that when the protective cover 1 installed on the track 2 is covered on the outer wall of the pressure vessel 3, the weld between the welding pipeline 31 and the pressure vessel 3 can be located inside the accommodating cavity at the same time.

[0028] It should be noted that, in this embodiment, the welding pipeline 31 located on the outer wall of the pressure vessel 3 is a steam chamber pipe.

[0029] It should be noted that in the prior art, the pressure vessel 3 is generally contained in a radiation chamber with a hollow structure, so that the pressure vessel 3 is shielded as a whole, and radiation shielding detection is performed in the radiation chamber. However, since there are multiple welds on the welding pipeline 31 of the pressure vessel 3, and each weld needs to be subjected to multiple radiation shielding detections, the pressure vessel 3 needs to be moved in and out of the radiation chamber multiple times. During the movement, the welds of the pressure vessel 3 and the welding pipeline 31 are easily damaged due to vibration and other reasons, which in turn causes the welding quality of the pressure vessel 3 and the welding pipeline 31 to decline, which has an adverse effect on the manufacturing quality of the pressure vessel 3. Therefore, in this embodiment, if Figure 1 As shown, the protective cover 1 can be moved on the workbench 4 via the track 2, so as to cover the outer wall of the pressure vessel 3, and form a accommodating cavity at the weld of the shielded pressure vessel 3 and the welding pipeline 31, so as to facilitate radiation shielding detection. During the whole process, the pressure vessel 3 does not need to be moved, thereby avoiding the adverse effect of the movement of the pressure vessel 3 on the welding quality of the pressure vessel 3 and the welding pipeline 31, thereby ensuring the manufacturing quality of the pressure vessel 3.

[0030] Optionally, a plurality of welded pipelines 31 are circumferentially spaced apart on the pressure vessel 3, and the track 2 is arranged in a ring shape around the circumference of the pressure vessel 3. When the protective cover 1 moves along the track 2 and separates from the pressure vessel 3, the protective cover 1 is used to move along the track 2 from one welded pipeline 31 to another welded pipeline 31.

[0031] like Figure 1 and Figure 2 As shown, a plurality of welding pipelines 31 are arranged at intervals along the circumferential direction on the pressure vessel 3. In order to realize the detection of radiation shielding at the welds between the plurality of welding pipelines 31 and the pressure vessel 3, in this embodiment, the track 2 is arranged in a ring shape around the circumference of the pressure vessel 3. After the protective cover 1 completes the shielding at the weld between one welding pipeline 31 and the pressure vessel 3, the protective cover 1 moves along the track 2 and separates from the pressure vessel 3. At this time, the protective cover 1 can move along the track 2, that is, move along the circumference of the pressure vessel 3, so that the protective cover 1 moves from one welding pipeline 31 to another adjacent welding pipeline 31. At this time, the opening of the protective cover 1 faces the other welding pipeline 31, and the protective cover 1 moves toward the pressure vessel 3 along the track 2 again. The cover is arranged on the outer wall of the pressure vessel 3, so that the weld between the other welding pipeline 31 and the pressure vessel 3 is located in the accommodating cavity surrounded by the protective cover 1 and the pressure vessel 3, which is convenient for radiation shielding detection at the weld.

[0032] It should be noted that if Figure 1 and Figure 2 As shown, a plurality of welded pipelines 31 are arranged in sequence at equal intervals end to end along the circumference of the pressure vessel 3 and are located at the same height of the pressure vessel 3 .

[0033] Optionally, there are two protective covers 1 , and the two protective covers 1 are evenly spaced apart along the circumference of the pressure vessel 3 .

[0034] In this embodiment, in order to improve the efficiency of radiation shielding detection at the weld of the welding pipeline 31 and the pressure vessel 3, as shown in FIG. Figure 1 and Figure 2 As shown, two protective covers 1 are provided, and the two protective covers 1 are evenly spaced along the circumference of the pressure vessel 3, that is, the opening directions of the two protective covers 1 are opposite, and both overlap with a radial direction of the pressure vessel 3. With this arrangement, two accommodating cavities can be formed on both sides of the pressure vessel 3 along the radial direction. At this time, the two radiation detection structures respectively located in the two accommodating cavities are farthest apart, and when the two radiation detection structures respectively output radiation, the radiation transmitted toward the weld is shielded by the pressure vessel 3, while the radiation transmitted toward the protective cover 1 is in the opposite direction, thereby avoiding the radiation emitted by the two radiation detection structures from influencing each other, and while the radiation shielding detection at the weld of the two welding pipelines 31 and the pressure vessel 3 can be performed simultaneously, the accuracy of the radiation shielding detection result can be guaranteed.

[0035] Optionally, the opening edge of the protective cover 1 is arranged in an arc shape and matches the outer wall contour shape of the pressure vessel 3. When the protective cover 1 is arranged on the outer wall of the pressure vessel 3, the opening edge of the protective cover 1 fits with the outer wall of the pressure vessel 3.

[0036] In this embodiment, since the pressure vessel 3 is a rotating body structure, its outer wall surface is a curved surface. In order to ensure the sealing of the accommodating cavity surrounded by the protective cover 1 and the pressure vessel 3, as shown in FIG. Figure 1 and Figure 2 As shown, the opening edge of the protective cover 1 is set to be an arc shape, and at the same time matches the outer wall contour shape of the pressure vessel 3, so that when the protective cover 1 is set on the outer wall of the pressure vessel 3, the opening edge of the protective cover 1 can fit with the outer wall of the pressure vessel 3, thereby achieving the sealing of the accommodating cavity and effectively improving the safety and accuracy of radiation shielding detection.

[0037] It should be noted that if Figure 1 and Figure 2 As shown, in this embodiment, the protective cover 1 is configured as a semi-cylindrical structure with its opening facing the rotation center of the pressure vessel 3, which can effectively improve the structural strength of the protective cover 1 and thereby ensure the working stability of the radiation shielding detection.

[0038] Optionally, an entrance and exit is provided on the end face of the protective cover 1 away from its open end, and a protective door 11 is movably installed at the entrance and exit; and / or, the wall panel of the protective cover 1 includes a first inner layer and a first outer layer, the first outer layer is arranged to cover the first inner layer, the first inner layer is a lead layer, and the first outer layer is a steel layer.

[0039] In this embodiment, in order to facilitate the operation of the staff, Figure 2As shown, an entrance and exit are arranged on the end face of the protective cover 1 facing away from the opening end, and a protective door 11 is movably installed at the entrance and exit. When the staff needs to place the radiation emitting structure or take out the radiation emitting structure, the staff can enter and exit the protective cover 1 by opening the protective door 11, that is, the protective cover 1 can be first placed on the pressure vessel 3, and then the staff enters the protective cover 1 through the protective door 11 to place the radiation emitting structure, which effectively improves the convenience and stability of placing the radiation emitting structure and avoids the movement of the protective cover 1 affecting the stability of the radiation emitting structure. At the same time, after the radiation emitting structure is placed and the staff comes out of the protective cover 1, the protective door 11 can be closed to seal the entire accommodating cavity, which effectively improves the safety and accuracy of radiation shielding detection.

[0040] In this embodiment or other embodiments of the present invention, in order to improve the protective performance of the protective cover 1 while ensuring the structural stability of the protective cover 1, a first inner layer and a first outer layer are provided to form a wall panel of the protective cover 1, wherein the first outer layer is provided to cover the first inner layer, and the first inner layer is a lead layer, which can effectively shield the rays and effectively improve the safety of the ray shielding detection, while the first outer layer is a steel layer, which can effectively improve the structural strength of the protective cover 1 and ensure the structural stability of the protective cover 1.

[0041] Optionally, the shielding protection device further includes a protection room 5 , which is installed on the track 2 and spaced apart from the protection cover 1 along the circumference of the pressure vessel 3 .

[0042] In this embodiment, if Figure 2 As shown, since the workbench 4 is suspended in the middle section of the pressure vessel 3, when performing radiation shielding inspection through the protective cover 1, in order to ensure safety, the staff needs to go up and down the workbench 4 every time the radiation shielding inspection of the weld of a welding pipeline 31 and the pressure vessel 3 is performed, which greatly increases the time of the radiation shielding inspection of the weld of the entire pressure vessel 3. Therefore, in order to improve the efficiency of radiation shielding inspection, as Figure 1 and Figure 2 As shown, a protection room 5 is also installed on the track 2, wherein the protection room 5 and the protection cover 1 are spaced apart along the circumference of the pressure vessel 3. With this arrangement, after placing the radiation emitting structure, the staff does not need to get off the workbench 4, but can directly enter the protection room 5. The protection room 5 can shield the radiation, and there is a certain distance between the protection room 5 and the protection cover 1, which not only ensures the work safety of the staff, but also greatly shortens the time of radiation shielding detection at the weld of the entire pressure vessel 3, and effectively improves the efficiency of radiation shielding detection.

[0043] It should be noted that, in the present embodiment, an opening is provided on the side wall of the protection room 5 , and a protection door body is provided on the opening. By opening and closing the protection door body, it is possible to enter the protection room 5 and shield the radiation through the protection room 5 .

[0044] Optionally, the protective room 5 is used to run along the track 2 and approach or move away from the protective cover 1 along the circumference of the pressure vessel 3; and / or, the wall panels of the protective room 5 include a second inner layer and a second outer layer, the second outer layer is arranged to cover the second inner layer, the second inner layer is a lead layer, and the second outer layer is a steel layer.

[0045] In order to match the protective cover 1 that needs to move along the circumference of the pressure vessel 3 so as to perform radiation shielding detection on the welds between multiple welding pipelines 31 and the pressure vessel 3, in the present embodiment, the protective room 5 is also configured to move along the track 2, so that the protective room 5 can be close to or away from the protective cover 1 along the circumference of the pressure vessel 3, and the distance between the protective cover 1 and the protective room 5 can be flexibly adjusted, which not only ensures the work safety of the staff, but also effectively improves the efficiency of radiation shielding detection.

[0046] In this embodiment or other embodiments of the present invention, in order to improve the protective performance of the protection room 5 while ensuring the structural stability of the protection room 5, a second inner layer and a second outer layer are provided to form the wall panel of the protection room 5, wherein the second outer layer is provided to cover the second inner layer, and the second inner layer is a lead layer, which can effectively shield the rays and effectively improve the safety of the ray shielding detection, and the second outer layer is a steel layer, which can effectively improve the structural strength of the protection room 5 and ensure the structural stability of the protection room 5.

[0047] Optionally, the track 2 includes a radial track 21, and a radial running wheel is rotatably installed on the protective cover 1. The radial track 21 is extended radially along the pressure vessel 3, and the radial running wheel is installed on the radial track 21. The protective cover 1 moves along the radial track 21 through the radial running wheel to cover or move away from the outer wall of the pressure vessel 3.

[0048] In this embodiment, if Figure 1 and Figure 2 As shown, in order to ensure that the protective cover 1 can stably move closer to or farther away from the pressure vessel 3 in the radial direction and complete the shielding of the weld on the pressure vessel 3, a radial track 21 is set as a part of the track 2, wherein the radial track 21 is set to extend radially along the pressure vessel 3, and radial running wheels are rotatably installed on the protective cover 1, and the radial running wheels are installed on the radial track 21, so that the protective cover 1 can move along the radial track 21 through the radial running wheels, covering or moving away from the outer wall of the pressure vessel 3, thereby achieving shielding at the weld.

[0049] It should be noted that, in the present embodiment, the radial running wheel comprises a driving wheel and a driven wheel, and is evenly distributed below the protective cover 1. The driving wheel of the radial running wheel is driven by a servo motor through an electro-hydraulic push rod, and is driven in cooperation with a reduction mechanism. A braking system is also provided, and the radial running wheel is provided with a track elastic limiter to ensure its reliable operation on the radial track 21. The rotation of the driving wheel of the radial running wheel driven by the servo motor can be controlled by a control element with a preset program built in, thereby realizing the control of the radial moving speed of the protective cover 1, and the moving position of the protective cover 1 can be positioned.

[0050] Optionally, the track 2 also includes a circumferential track 22, a movable platform 23 and a circumferential running wheel. The circumferential track 22 is arranged in a ring shape along the circumference of the pressure vessel 3 and is installed on the workbench 4. The circumferential running wheel is rotatably installed on the movable platform 23 and is installed on the circumferential track 22. The movable platform 23 moves along the circumferential track 22 through the circumferential running wheel, and the radial track 21 is installed on the movable platform 23.

[0051] In this embodiment, if Figure 1 and Figure 2 As shown, in order to ensure that the protective cover 1 can stably move along the circumference of the pressure vessel 3 and complete the sequential shielding of multiple welds on the pressure vessel 3, a circumferential track 22, a movable platform 23 and a circumferential running wheel are set as part of the track 2, wherein the circumferential track 22 is arranged in a ring shape along the circumference of the pressure vessel 3, and the circumferential running wheel is rotatably installed on the movable platform 23 and can run along the circumferential track 22, so that the movable platform 23 can move along the circumference of the pressure vessel 3. On this basis, the radial track 21 is installed on the movable platform 23, and the protective cover 1 is movably installed on the radial track 21 by the radial running wheel, so that the protective cover 1 can be moved along the circumference of the pressure vessel 3 by the movable platform 23 along the circumference of the pressure vessel 3, so as to achieve sequential shielding of multiple welds.

[0052] It should be noted that, in the present embodiment, the circular running wheel comprises a driving wheel and a driven wheel, and is evenly distributed below the moving platform 23. The driving wheel of the circular running wheel is driven by a servo motor in cooperation with a reduction mechanism, and is provided with a braking system, and the circular running wheel is provided with a track side limiter to ensure its reliable operation on the circular track 22. The rotation of the driving wheel of the circular running wheel driven by the servo motor can be controlled by a control element with a built-in preset program, thereby realizing the control of the circumferential moving speed of the protective cover 1, and the moving position of the protective cover 1 can be positioned.

[0053] On the other hand, an embodiment of the present invention provides a radiation detection device, including the above-mentioned shielding protection device.

[0054] The technical effect of the radiation detection equipment in this embodiment is similar to the technical effect of the above-mentioned shielding protection device, which will not be repeated here.

[0055] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A shielding protection device, characterized in that: The invention comprises a protective cover (1) and a track (2), wherein the track (2) is used to be installed on a workbench (4) where a pressure vessel (3) is located, and the protective cover (1) is installed on the track (2) and is arranged with an opening facing a welding pipeline (31) on the outer wall of the pressure vessel (3). The protective cover (1) is used to run along the track (2) and cover the outer wall of the pressure vessel (3) to cooperate with the outer wall of the pressure vessel (3) to form a receiving cavity, and the weld between the welding pipeline (31) and the pressure vessel (3) is located in the receiving cavity.

2. The shielding protection device according to claim 1, characterized in that: A plurality of the welded pipelines (31) are arranged at intervals along the circumferential direction on the pressure vessel (3); the track (2) is arranged in a ring shape around the circumference of the pressure vessel (3); when the protective cover (1) moves along the track (2) and is separated from the pressure vessel (3), the protective cover (1) is used to move along the track (2) from one welded pipeline (31) to another welded pipeline (31).

3. The shielding protection device according to claim 2, characterized in that: There are two protective covers (1), and the two protective covers (1) are distributed at equal intervals along the circumference of the pressure container (3).

4. The shielding protection device according to any one of claims 1 to 3, characterized in that: The opening edge of the protective cover (1) is arranged in an arc shape and matches the contour shape of the outer wall of the pressure vessel (3); when the protective cover (1) is arranged on the outer wall of the pressure vessel (3), the opening edge of the protective cover (1) fits the outer wall of the pressure vessel (3).

5. The shielding protection device according to any one of claims 1 to 3, characterized in that: The protective cover (1) is provided with an entrance and an exit on the end surface away from the opening end thereof, and a protective door (11) is movably installed at the entrance and an exit; And / or, the wall panel of the protective cover (1) comprises a first inner layer and a first outer layer, the first outer layer is arranged to cover the first inner layer, the first inner layer is a lead layer, and the first outer layer is a steel layer.

6. The shielding protection device according to any one of claims 1 to 3, characterized in that: It also includes a protection room (5), which is installed on the track (2) and is spaced apart from the protection cover (1) along the circumference of the pressure vessel (3).

7. The shielding protection device according to claim 6, characterized in that: The protection room (5) is used to move along the track (2) and approach or move away from the protection cover (1) along the circumference of the pressure vessel (3); And / or, the wall panels of the protective room (5) include a second inner layer and a second outer layer, the second outer layer is arranged to cover the second inner layer, the second inner layer is a lead layer, and the second outer layer is a steel layer.

8. The shielding protection device according to any one of claims 1 to 3, characterized in that: The track (2) comprises a radial track (21), a radial running wheel is rotatably mounted on the protective cover (1), the radial track (21) is arranged to extend radially along the pressure vessel (3), the radial running wheel is mounted on the radial track (21), and the protective cover (1) moves along the radial track (21) via the radial running wheel to cover or move away from the outer wall of the pressure vessel (3).

9. The shielding protection device according to claim 8, characterized in that: The track (2) further comprises a circumferential track (22), a moving platform (23) and a circumferential running wheel. The circumferential track (22) is arranged in a ring shape along the circumference of the pressure vessel (3) and is mounted on the workbench (4). The circumferential running wheel is rotatably mounted on the moving platform (23) and is mounted on the circumferential track (22). The moving platform (23) moves along the circumferential track (22) via the circumferential running wheel. The radial track (21) is mounted on the moving platform (23).

10. A radiation detection device, characterized in that: The invention comprises the shielding protection device as claimed in any one of claims 1 to 9.

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