A nuclear reactor shielding transport device

Abstract

The present invention provides a nuclear reactor shielding and transportation device, which relates to the field of nuclear power technology, including a center frame assembly and at least one rotating frame assembly, wherein the center frame assembly includes a center frame and a base connected to each other, and the rotating frame assembly includes a sealing baffle, an inner ring frame, an outer ring frame with an open mouth, and at least two arms, wherein the inner ring frame is sleeved and detachably connected to the center frame, and the arms are arranged in an annular interval, and two adjacent arms and the inner ring frame form a receiving groove with a notch, and the sealing baffle is used to connect with the outer ring frame to form a closed annular structure, and one end of the arm is connected to the inner ring frame, and the other end is slidably connected to the outer ring frame and the sealing baffle. The present invention only needs to lift the shielding rod to a height slightly higher than the base, and then it can be lifted from the open mouth to the receiving groove, thereby improving work efficiency and ensuring the stability and safety of the shielding rod; the present scheme can realize the transportation of at least two shielding rods, improve the transportation efficiency of the shielding rods, and provide a basis for the rapid installation of the shielding rods in the stack container.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power technology, and in particular to a nuclear reactor shielding and transportation device. Background Art

[0002] At present, the shielding of nuclear reactors is usually in the form of shielding rods. Before the shielding rods are installed in the reactor vessel, they need to be transported from the stacking area to the reactor vessel.

[0003] In the prior art, an inverted "T"-shaped tool is usually used, with a counterweight placed on one end and a shielding rod placed on the other end, and then the shielding rods are hoisted one by one from the stacking area to the stacking container by an overhead crane for installation. However, since the number of shielding rods can reach thousands and the specifications of the shielding rods are different, the counterweight needs to be adjusted frequently during continuous hoisting work, resulting in low transportation efficiency. Summary of the invention

[0004] The problem solved by the invention is how to improve the lifting efficiency of the nuclear reactor shield.

[0005] In order to solve the above problems, the present invention provides a nuclear reactor shielding and transportation device, including: a central frame assembly, including a central frame and a base, the bottom of the central frame is connected to the base; a rotating frame assembly, including a sealing baffle, an inner ring frame with a receiving groove and an outer ring frame with an open mouth, the groove of the receiving groove is located on the side of the receiving groove away from the central frame, the inner ring frame is located on the inner side of the outer ring frame, and is rotatably connected to the outer ring frame, and the inner ring frame is sleeved on the central frame, and the sealing baffle is used to connect with the outer ring frame at the open mouth to form a closed ring structure.

[0006] Optionally, the width of the opening is less than or equal to the width of the notch.

[0007] Optionally, the rotating frame assembly also includes a connecting arm and a roller bearing, the inner ring frame includes an inner ring frame body and a support arm, the support arm is arranged at intervals along the outer edge of the inner ring frame body, the inner ring frame body and two adjacent support arms form the accommodating groove, the inner side surface of the outer ring frame is provided with an annular groove, one end of the connecting arm is connected to the support arm, and the other end is connected to the roller bearing, and the roller bearing is used to roll in the annular groove.

[0008] Optionally, the outer surface of the outer ring frame is at least partially provided with a first elastic protective member, and / or the outer surface of the inner ring frame is at least partially provided with a second elastic protective member, and / or the outer surface of the sealing baffle is at least partially provided with a third elastic protective member.

[0009] Optionally, the base includes a limiting plate and a fixing plate, which are arranged in sequence from top to bottom and are respectively sleeved on the center frame, and the limiting plate is provided with a first through hole, and the inner diameter of the first through hole is used to adapt to the outer diameter of the bottom of the shielding rod.

[0010] Optionally, the base further includes a fifth elastic protective member, the fifth elastic protective member is arranged on the limiting plate, the fifth elastic protective member is provided with a second through hole, and the first through hole is connected to the second through hole and is coaxially arranged.

[0011] Optionally, the fifth elastic protection member is provided with a countersink at the second through hole.

[0012] Optionally, the base further includes a rib plate, and the rib plate is connected to the limiting plate, the fixing plate and the center frame.

[0013] Optionally, the rotating frame assembly further includes a sleeve, which is sleeved on the center frame and detachably connected to the center frame, and the bottom of the inner ring frame abuts against the top of the sleeve.

[0014] Optionally, at least two mounting hole groups are provided on the center frame, and the mounting hole groups are arranged at intervals along the axial direction of the center frame, and the sleeve is detachably connected to the center frame at the mounting hole groups.

[0015] The nuclear reactor shielding transportation device of the present invention only needs to lift the shielding rod to a height slightly higher than the base, and then it can be lifted from the open mouth to the receiving groove. Compared with the solution of lifting the shielding rod to insert it into the receiving groove in the vertical direction, this solution improves the working efficiency and avoids the collision of the shielding rod with the parts around the receiving groove when falling, thereby ensuring the stability and safety of the shielding rod; and, when loading or unloading a part of the shielding rods, the loaded or to-be-unloaded shielding rods are limited by the outer ring frame and the base. After the loading of the shielding rods is completed, the sealing baffle is placed at the open mouth to connect with the outer ring frame to form a closed annular structure, further ensuring the stability and safety of the shielding rods; in addition, compared with the traditional solution of lifting the shielding rods one by one, this solution can realize the transportation of a group (at least two) of shielding rods, greatly improving the transportation efficiency of the shielding rods, and providing a basis for the rapid installation of the shielding rods in the stack container. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the top view of the rotating frame assembly according to an embodiment of the present invention;

[0017] Figure 2 It is a schematic diagram of the top view of the structure of the rotating frame assembly after the shielding rod is loaded according to the embodiment of the present invention;

[0018] Figure 3 for Figure 2Schematic diagram of the cross-section structure at DD in the middle;

[0019] Figure 4 It is a front view structural schematic diagram of a nuclear reactor shielding and transporting device according to an embodiment of the present invention;

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of a base according to an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Rotating frame assembly; 11. Support arm; 111. Second elastic protection member; 12. Outer ring frame; 121. Open mouth; 122. Annular groove; 123. First elastic protection member; 13. Inner ring frame; 131. Inner ring frame body; 14. Sealing baffle; 141. Third elastic protection member; 15. Sleeve; 16. Connecting arm; 2. Center frame assembly; 21. Center frame; 211. Lifting ear; 22. Base; 221. Limiting plate; 2211. First through hole; 222. Fixing plate; 2221. U-shaped opening; 223. Fifth elastic protection member; 224. Rib plate; 2231. Second through hole; 2232. Countersunk hole; 3. Accommodating groove; 31. Notch; 4. Roller bearing. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, 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 herein, the positive direction of the X axis represents the right, the reverse direction of the X axis represents the left, the positive direction of the Y axis represents the front, the reverse direction of the Y axis represents the back, the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom. At the same time, it should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0025] An embodiment of the present invention provides a nuclear reactor shielding and transportation device, including: a central frame assembly 2, including a central frame 21 and a base 22, the bottom of the central frame 21 being connected to the base 22; a rotating frame assembly 1, including a sealing baffle 14, an inner ring frame 13 provided with a receiving groove 3 and an outer ring frame 12 provided with an opening 121, the notch 31 of the receiving groove 3 being located on the side of the receiving groove 3 away from the central frame 21, the inner ring frame 13 being located on the inner side of the outer ring frame 12 and being rotatably connected to the outer ring frame 12, and the inner ring frame 13 being sleeved on the central frame 21, and the sealing baffle 14 being used to be connected to the outer ring frame 12 at the opening 121 to form a closed annular structure.

[0026] Specifically, combined Figures 1 to 5 As shown, the center frame 21 is a cylindrical tubular structure, and two rotating frame assemblies 1 are arranged along the central axis of the center frame 21. The base 22 can adopt a structure similar to a truncated cone (the base 22 adopting this structure is not shown in the figure), and a hole groove is opened at the center. After the center frame 21 is inserted into the hole groove, the center frame 21 and the base 22 are welded as a whole. The inner ring frame 13 is a circular ring structure, and the inner ring frame 13 is arranged at a distance from the base 22. A plurality of accommodating grooves 3 are opened on the inner ring frame 13, and the accommodating grooves 3 have a direction away from the center frame 21. Notch 31, the outer ring frame 12 is an open circular ring structure similar to a C shape with an open mouth 121, and the two ends of the outer ring frame 12 and the two ends of the sealing baffle 14 are detachably connected at the open mouth 121 to form a closed ring structure, the outer ring frame 12 and the sealing baffle 14 are all rotatably connected to the inner ring frame 13 (the sealing baffle 14 and the inner ring frame 13 can also be not provided with a rotatable connection, as long as it does not affect the rotation of the outer ring frame 12 and the inner ring frame 13), and the outer ring frame 12 and the sealing baffle 14 can both rotate relative to the inner ring frame 13.

[0027] It should be noted that the center frame 21 and the base 22 may also adopt other shapes and structures, as long as the turret assembly 1 can be fixed to achieve stable support, and no specific restrictions are made here; the turret assembly 1 can be increased or decreased in number according to the length of the shielding rods to be transported, and its specific number is not limited here; the accommodating groove 3 can be designed according to the cross-sectional size of the shielding rod (for example, when a nuclear reactor shielding transportation device is used to transport shielding rods of different diameters, it can be designed into corresponding accommodating grooves 3 of different diameters), and no specific restrictions are made here; in addition, the sizes of the open mouth 121 and the slot 31 can be designed according to actual needs, and no specific restrictions are made here.

[0028] For example, in combination Figure 1 and Figure 2As shown, the process of loading shielding rods on the nuclear reactor shielding transportation device of the present invention is as follows: first, the sealing baffle 14 is disassembled, and the open port 121 is connected with at least one notch 31, and the shielding rod can be moved from the open port 121 into the receiving groove 3 along the radial direction of the center frame 21 by the overhead crane, and the shielding rod is axially positioned by the base 22; then, the outer ring frame 12 is rotated, and the open port 121 is rotated to be connected with the remaining receiving grooves 3, and the remaining shielding rods are moved into the receiving grooves 3; after all the shielding rods are moved into the corresponding receiving grooves 3 to realize the loading of the shielding rods, the sealing baffle 14 is connected to the outer ring frame 12 to form a closed annular structure, and the nuclear reactor shielding transportation device loaded with the shielding rods is lifted into the stack container by the lifting ears 211 set on the center frame 21 for subsequent shielding installation work; conversely, it is the process of unloading the shielding rods by the nuclear reactor shielding transportation device of the present invention.

[0029] For example, one end of the sealing baffle 14 can be detachably connected to one end of the outer ring frame 12, and the other end is hinged to the other end of the outer ring frame 12. When the shielding rod needs to be loaded, one end of the sealing baffle 14 is removed, and the opening 121 is connected to the slot 31 by rotating around the hinge axis of the other end. (This solution is not shown in the figure)

[0030] The nuclear reactor shielding transportation device of the present invention only needs to lift the shielding rod to a height slightly higher than the base 22, and then it can be lifted from the open mouth 121 to the accommodating groove 3. Compared with the scheme of lifting the shielding rod to insert it into the accommodating groove 3 in the vertical direction, this scheme improves the working efficiency and avoids the collision of the shielding rod with the parts around the accommodating groove 3 when falling, thereby ensuring the stability and safety of the shielding rod; and, when loading or unloading a part of the shielding rods, the loaded or to-be-unloaded shielding rods are limited by the outer ring frame 12 and the base 22. After the loading of the shielding rods is completed, the sealing baffle 14 is placed at the open mouth 121 to connect with the outer ring frame 12 to form a closed ring structure, further ensuring the stability and safety of the shielding rods; in addition, compared with the traditional scheme of lifting the shielding rods one by one, this scheme can realize the transportation of a group (at least two) of shielding rods, greatly improving the transportation efficiency of the shielding rods, and providing a basis for the rapid installation of the shielding rods in the stack container.

[0031] Optionally, the width of the opening 121 is less than or equal to the width of the notch 31 .

[0032] Specifically, combined Figure 1 and Figure 2 As shown, the outer ring frame 12 of the C-shaped open ring structure has an open mouth 121, and the width of the open mouth 121 is smaller than the width of the slot 31 (obviously, when the width of the open mouth 121 is equal to the width of the slot 31, it can also ensure the limiting effect on the shielding rods that have been loaded or to be unloaded).

[0033] In this way, when loading or unloading the shielding rods, the loaded or to-be-unloaded shielding rods are limited by the inner ring frame 13 and the support arm 11, and are also limited by the outer ring frame 12, so that the shielding rods are completely limited in radial direction, ensuring the stability and safety of the loaded or to-be-unloaded shielding rods.

[0034] Optionally, the rotating frame assembly 1 also includes a connecting arm 16 and a roller bearing 4, the inner ring frame 13 includes an inner ring frame body 131 and a support arm 11, the support arm 11 is arranged at intervals along the outer edge of the inner ring frame body 131, the inner ring frame body 131 and the two adjacent support arms 11 form the accommodating groove 3, the inner side surface of the outer ring frame 12 is provided with an annular groove 122, one end of the connecting arm 16 is connected to the support arm 11, and the other end is connected to the roller bearing 4, and the roller bearing 4 is used to roll in the annular groove 122.

[0035] Specifically, combined Figures 1 to 3 As shown, the inner ring frame 13 is formed by an inner ring frame body 131 and six support arms 11 connected integrally, wherein the six support arms 11 are arranged in a ring shape and are evenly spaced, and two adjacent support arms and the inner ring frame body 131 form a structure similar to a U-shaped groove with a notch 31 (i.e., an accommodating groove 3), and the outer ring frame 12 is an open ring structure with an open mouth 121. The sealing baffle 14 may also be provided with an arc groove, which together with the annular groove 122 forms a closed annular groove structure, and a connecting arm 16 is installed on the lower side of the support arm 11 (i.e., the side in the opposite direction of the Z axis in the figure), and the end of the connecting arm 16 close to the outer ring frame 12 is connected to the roller bearing 4, and the roller bearing 4 can roll along the annular groove 122 and the arc groove.

[0036] It should be noted that it is not necessary for the sealing baffle 14 to be provided with an arc groove. Even if the support arm 11 and the sealing baffle 14 cannot slide relative to each other, after the sealing baffle 14 is disassembled and separated from the outer ring frame 12, it will not affect the relative sliding between the outer ring frame 12 and the support arm 11; in addition, the number, width and spacing distribution of the support arms 11 will affect the size of the accommodating groove 3, so the specific structure of the support arm 11 can be adaptively designed according to the size parameters of the shielding rod, and no specific restrictions are made here.

[0037] In this way, the roller bearing 4 is connected to the connecting arm 16. When assembling the nuclear reactor shielding and transportation device, the roller bearing 4 is first placed in the annular groove 122, and then the connecting arm 16 is connected to the support arm 11, avoiding the assembly difficulty caused by the roller bearing 4 being directly connected to the support arm 11, and realizing the relative sliding between the outer ring frame 12 and the support arm 11.

[0038] Optionally, the outer surface of the outer ring frame 12 is at least partially provided with a first elastic protective member 123, and / or the outer surface of the inner ring frame 13 is at least partially provided with a second elastic protective member 111, and / or the outer surface of the sealing baffle 14 is at least partially provided with a third elastic protective member 141.

[0039] Specifically, combined Figures 1 to 3 As shown, the second elastic protection member 111 is covered on the inner ring frame 13, and at least covers the end surface of the inner ring frame 13 facing the accommodating groove 3 (in order to facilitate the installation of the second elastic protection member 111 by screws, it can also be made as shown in FIG. Figure 3 As shown in the figure, the first elastic protective member 123 is an open ring structure, and the third elastic protective member 141 can form a closed ring structure with the first elastic protective member 123. The first elastic protective member 123 and the third elastic protective member 141 are respectively covered on the end surface of the outer ring frame 12 and the sealing baffle 14 facing the accommodating groove 3 (in order to facilitate the installation of the first elastic protective member 123 and the third elastic protective member 141 by screws, it can also be made as shown in the figure. Figure 1 As shown in FIG. 1 , the outer ring frame 12 is covered with an upper end surface and a lower end surface, and an upper end surface and a lower end surface of the sealing baffle 14).

[0040] It should be noted that, combined with Figure 2 As shown, the first elastic protective member 123, the second elastic protective member 111 and the third elastic protective member 141 in the above embodiment do not need to be completely in contact with the loaded shielding rod. Therefore, it can be conceived that the first elastic protective member 123, the second elastic protective member 111 and the third elastic protective member 141 are arranged on part of the outer surface of the outer ring frame 12, the inner ring frame 13 and the sealing baffle 14, and the specific arrangement method is not specifically limited here; in addition, the first elastic protective member 123, the second elastic protective member 111 and the third elastic protective member 141 can generally be made of nylon material, and it can also be made of other materials with similar properties, which are not specifically limited here.

[0041] In this way, the shielding rods loaded by the nuclear reactor shielding transport device can avoid rigid contact with the inner ring frame 13, the support arm 11, the outer ring frame 12 and the sealing baffle 14, thereby playing a protective role on the surface of the shielding rods.

[0042] Optionally, the base 22 includes a limiting plate 221 and a fixing plate 222, the limiting plate 221 and the fixing plate 222 are arranged in sequence from top to bottom and are respectively sleeved on the center frame 21, the limiting plate 221 is provided with a first through hole 2211, and the inner diameter of the first through hole 2211 is used to adapt to the outer diameter of the bottom of the shielding rod.

[0043] Specifically, combined Figure 4 and Figure 5As shown, the fixing plate 222 is an annular plate structure, which is sleeved on the lower end of the center frame 21 (i.e., the end in the opposite direction of the Z axis in the figure) and welded to the center frame 21. The fixing plate 222 is provided with three U-shaped openings 2221 at annular intervals, which are convenient for detachable connection through fasteners such as bolts, so that the nuclear reactor shielding transportation device can be firmly connected with structures such as brackets after being hoisted into the reactor container, so as to carry out subsequent shielding installation work. The limiting plate 221 is an annular plate structure, and a plurality of first through holes 2211 are arranged at annular intervals on the limiting plate 221. The aperture size of the first through hole 2211 can be designed according to the outer diameter of the small diameter end of the shielding rod. The limiting plate 221 is sleeved on the center frame 21 at a distance from one end of the fixing plate 222, and is welded to the center frame 21.

[0044] In this way, the small-diameter end usually provided on the shielding rod can be inserted into the first through hole 2211 and abut against the limiting plate 221 through the shaft shoulder, thereby realizing the axial limiting and radial limiting of the shielding rod.

[0045] Optionally, the base 22 further includes a fifth elastic protective member 223 , which is disposed on the limiting plate 221 , and a second through hole 2231 is defined in the fifth elastic protective member 223 , and the first through hole 2211 is connected to the second through hole 2231 and is coaxially disposed.

[0046] Specifically, combined Figure 4 As shown, the fifth elastic protective member 223 (which can be made of nylon material) is an annular plate structure and is installed at the upper end of the limiting plate 221 (i.e., the end along the positive direction of the Z axis in the figure), and the fifth elastic protective member 223 is coaxially provided with a second through hole 2231 corresponding to the first through hole 2211.

[0047] In this way, the small diameter end usually provided on the shielding rod can be inserted into the second through hole 2231 and the first through hole 2211, and abut against the fifth elastic protective member 223 through the shoulder, avoiding rigid contact between the shoulder of the shielding rod and the limiting plate 221, thereby protecting the surface of the shielding rod.

[0048] Optionally, the fifth elastic protection member 223 is provided with a countersunk hole 2232 at the second through hole 2231 .

[0049] Specifically, combined Figure 4 As shown, the fifth elastic protection member 223 is provided with a countersink 2232 at the second through hole 2231. The diameter of the countersink 2232 can be designed according to the outer diameter of the large diameter end face (i.e., the end face at the shoulder) of the shielding rod, and its diameter is usually slightly larger than the outer diameter of the large diameter end face of the shielding rod.

[0050] In this way, by the countersunk hole 2232 abutting against the large-diameter end surface of the shielding rod, a more stable axial limitation of the shielding rod can be achieved.

[0051] Optionally, the base 22 further includes a rib plate 224 , and the rib plate 224 is connected to the limiting plate 221 , the fixing plate 222 and the center frame 21 .

[0052] Specifically, combined Figure 4 and Figure 5 As shown, three end faces of the ribs 224 are respectively welded to the limiting plate 221, the fixing plate 222 and the center frame 21, and the same number of ribs 224 are arranged in a ring-shaped interval corresponding to the number of first through holes 2211 (ie, the number of shielding rods that can be loaded).

[0053] In this way, the connection between the limiting plate 221, the fixing plate 222 and the center frame 21 is reinforced by the rib plate 224, thereby ensuring the stability and safety of the shielding rod.

[0054] Optionally, the rotating frame assembly 1 further includes a sleeve 15 , which is sleeved on the central frame 21 and detachably connected to the central frame 21 , and the bottom of the inner ring frame 13 abuts against the top of the sleeve 15 .

[0055] Specifically, combined Figure 3 and Figure 4 As shown, the sleeve 15 is welded to the lower end of the inner ring frame 13 (i.e., the end in the opposite direction of the Z axis in the figure), and the sleeve 15 is sleeved on the center frame 21 and connected to the center frame 21 by bolt fasteners.

[0056] In this way, the rotating frame assembly 1 can be stably connected to the center frame 21, thereby achieving stable positioning of the shielding rod.

[0057] Optionally, at least two mounting hole groups are provided on the central frame 21 , and the mounting hole groups are arranged at intervals along the axial direction of the central frame 21 , and the sleeve 15 is detachably connected to the central frame 21 at the mounting hole groups.

[0058] Specifically, combined Figure 3 and Figure 4 As shown, a plurality of mounting holes are evenly arranged in a ring shape at a certain height of the center frame 21. The plurality of mounting holes at the same height is a mounting hole group. At least two mounting hole groups are spaced apart on the center frame 21 along the Z-axis direction in the figure (i.e., the axial direction of the center frame 21). The sleeve 15 is mounted and detachably connected to one of the mounting hole groups by bolt fasteners.

[0059] In this way, by making the sleeve 15 detachably connected to the center frame 21 at the mounting hole groups at different axial positions, the axial position of the turret assembly 1 on the center frame 21 can be adjusted, thereby making the nuclear reactor shielding transportation device suitable for the transportation function of shielding rods of different lengths.

[0060] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A nuclear reactor shielding transport device, characterized in that: include: A center frame assembly (2), comprising a center frame (21) and a base (22), wherein the bottom of the center frame (21) is connected to the base (22); A rotating frame assembly (1), comprising a sealing baffle (14), an inner ring frame (13) provided with a receiving groove (3), and an outer ring frame (12) provided with an opening (121), wherein the notch (31) of the receiving groove (3) is located on a side of the receiving groove (3) away from the center frame (21), the inner ring frame (13) is located on the inner side of the outer ring frame (12) and is rotatably connected to the outer ring frame (12), and the inner ring frame (13) is sleeved on the center frame (21), and the sealing baffle (14) is used to be connected to the outer ring frame (12) at the opening (121) to form a closed annular structure; The rotating frame assembly (1) further comprises a connecting arm (16) and a roller bearing (4); the inner ring frame (13) comprises an inner ring frame body (131) and a support arm (11); the support arm (11) is arranged at intervals along the outer edge of the inner ring frame body (131); the inner ring frame body (131) and two adjacent support arms (11) form the accommodating groove (3); an annular groove (122) is formed on the inner side surface of the outer ring frame (12); one end of the connecting arm (16) is connected to the support arm (11), and the other end is connected to the roller bearing (4); and the roller bearing (4) is used for rolling in the annular groove (122); The base (22) comprises a limiting plate (221) and a fixing plate (222), the limiting plate (221) and the fixing plate (222) being arranged in sequence from top to bottom and respectively sleeved on the central frame (21), the limiting plate (221) being provided with a first through hole (2211), the inner diameter of the first through hole (2211) being adapted to the outer diameter of the bottom of the shielding rod; The base (22) further comprises a rib plate (224), wherein the rib plate (224) is connected to the limiting plate (221), the fixing plate (222) and the center frame (21); The rotating frame assembly (1) further comprises a sleeve (15), wherein the sleeve (15) is sleeved on the central frame (21) and is detachably connected to the central frame (21), and the bottom of the inner ring frame (13) abuts against the top of the sleeve (15); At least two mounting hole groups are provided on the center frame (21), the mounting hole groups are arranged at intervals along the axial direction of the center frame (21), and the sleeve (15) is detachably connected to the center frame (21) at the mounting hole groups.

2. The nuclear reactor shielding transport device according to claim 1, characterized in that: The width of the open opening (121) is less than or equal to the width of the notch (31).

3. The nuclear reactor shielding transport device according to claim 1, characterized in that: The outer surface of the outer ring frame (12) is at least partially provided with a first elastic protective member (123), and / or the outer surface of the inner ring frame (13) is at least partially provided with a second elastic protective member (111), and / or the outer surface of the sealing baffle (14) is at least partially provided with a third elastic protective member (141).

4. The nuclear reactor shielding transport device according to claim 1, characterized in that: The base (22) further comprises a fifth elastic protection member (223), the fifth elastic protection member (223) being arranged on the limiting plate (221), the fifth elastic protection member (223) being provided with a second through hole (2231), the first through hole (2211) being connected to the second through hole (2231) and being coaxially arranged.

5. The nuclear reactor shielding transport device according to claim 4, characterized in that: The fifth elastic protection member (223) is provided with a countersunk hole (2232) at the second through hole (2231).

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