Nuclear fuel assembly protection sleeve and transportation device

Abstract

The utility model discloses a nuclear fuel assembly protection sleeve and a transportation device, and relates to the technical field of nuclear fuel assemblies, the nuclear fuel assembly protection sleeve comprises a protection assembly, the protection assembly comprises an outer cylinder body, a containing piece arranged in the outer cylinder body, sealing pieces arranged at the two ends of the outer cylinder body, and a pressing piece arranged on the outer wall of one end of the containing piece; by arranging the containing piece, the nuclear fuel assembly can be placed in the cavity, the nuclear fuel assembly is fixed through the pressing assembly, damage caused by displacement or vibration is prevented, the two ends of the outer barrel are sealed through the sealing piece, and scattering of the nuclear fuel assembly is avoided; according to the nuclear fuel assembly protection sleeve, the potential collision and collision risks in the transportation process of the nuclear fuel assembly are greatly reduced, in addition, the transportation assembly is arranged to be connected with the nuclear fuel assembly protection sleeves, vertical stacking and transportation of the two nuclear fuel assembly protection sleeves can be achieved, and therefore the transportation efficiency and the space utilization rate are improved; and the potential collision and collision risks of the nuclear fuel assembly in the transportation process are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear fuel assembly technical field especially nuclear fuel assembly protection sleeve and transportation device. BACKGROUND

[0002] At present, the civil nuclear field of our country develops steadily, nuclear power unit safe and stable operation, the number of units under construction also increases year by year, and the demand quantity and transportation quantity of nuclear fuel assembly are increasing, and nuclear fuel assembly belongs to high-risk radioactive transportation due to its particularity, plays a crucial role to environmental safety and public health, so the safety protection in the transportation process of nuclear fuel assembly is particularly important.

[0003] The existing nuclear fuel assembly may be unstable due to vibration, impact and other reasons during transportation, increasing the risk of radiation leakage, and in the case of limited space of the existing transportation tool, the nuclear fuel assembly transportation device can usually only be placed horizontally, occupying a large space, resulting in low transportation efficiency.

[0004] Based on the above problems, we propose a nuclear fuel assembly protection sleeve and transportation device. INVENTION CONTENTS

[0005] Therefore, the technical problems to be solved by the utility model are how to enhance the protection of nuclear fuel assembly, ensure its safety under various transportation conditions and how to transport more nuclear fuel assemblies in the case of limited space of the transportation tool.

[0006] The above technical problems are solved by the following technical scheme: the protection assembly comprises an outer cylinder, a containing piece arranged inside the outer cylinder, a closing piece arranged at both ends of the outer cylinder and a pressing piece arranged at one end of the containing piece; the nuclear fuel assembly can be placed inside the containing piece, the nuclear fuel assembly inside the containing piece can be pressed by the pressing piece, and the closing piece can close both ends of the outer cylinder.

[0007] In a preferred embodiment of the nuclear fuel assembly protection sleeve, the containing piece comprises a pipe body arranged inside the outer cylinder, and the pipe body is provided with a cavity.

[0008] In a preferred embodiment of the nuclear fuel assembly protection sleeve, a plurality of partition plates are arranged between the outer cylinder and the pipe body.

[0009] In a preferred embodiment of the nuclear fuel assembly protection sleeve, sealing flanges are arranged at both ends of the outer cylinder, and sealing rings are embedded on the outer walls of the sealing flanges.

[0010] In a preferred embodiment of the nuclear fuel assembly protection sleeve, the closure piece comprises end caps arranged at two ends of the outer cylinder, and one of the end caps is provided with a handle on the outer wall.

[0011] In a preferred embodiment of the nuclear fuel assembly protection sleeve, the end cap and the sealing flange are detachably connected through bolts.

[0012] In a preferred embodiment of the nuclear fuel assembly protection sleeve, the pressing piece comprises a fixing bolt arranged at one end of the pipe body, and a connecting plate is movably arranged on the outer wall of the fixing bolt.

[0013] In a preferred embodiment of the nuclear fuel assembly protection sleeve, a plurality of adjusting bolts are arranged through the outer wall of the connecting plate, and a pressing plate is arranged on the outer wall of one end of the plurality of adjusting bolts.

[0014] The nuclear fuel assembly protection sleeve has the advantages that: the nuclear fuel assembly can be placed in the cavity through the arrangement of the containing piece, the nuclear fuel assembly is fixed through the pressing assembly, damage caused by displacement or vibration is prevented, the two ends of the outer cylinder are closed through the closure piece, the nuclear fuel assembly is prevented from scattering, and the potential risk of knocking and impact of the nuclear fuel assembly during transportation is greatly reduced.

[0015] The utility model also proposes a kind of transport device, it includes support component, including base and lap joint piece;The outer wall of the base is provided with positioning hole, the top of the base is provided with connecting web, the both sides of the base are provided with arc surface.

[0016] In a preferred embodiment of the transport device, the lap joint piece comprises a notch arranged in the bottom of the base, the outer wall of the connecting web is provided with a lifting lug, and the lifting lug is movably matched with the notch arranged in the bottom of another base.

[0017] Another advantage of the utility model is that by arranging the transport assembly and connecting the nuclear fuel assembly protection sleeve, vertical stacking and transportation of two sets of nuclear fuel assembly protection sleeves can be realized, thereby improving transportation efficiency and space utilization, and greatly reducing the potential risk of knocking and impact of the nuclear fuel assembly during transportation. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the utility model, and are not a limitation on the utility model. Among them:

[0019] Figure 1 Two sets of nuclear fuel assembly stacking schematic diagram are shown;

[0020] Figure 2 The protective assembly and the support assembly connection structure schematic diagram is shown;

[0021] Figure 3 The protective assembly connection structure schematic diagram is shown;

[0022] Figure 4 The protective assembly internal structure cross-sectional view is shown;

[0023] Figure 5 The containing piece connection structure schematic diagram is shown;

[0024] Figure 6 The pressing piece connection structure schematic diagram is shown;

[0025] Figure 7 The support assembly connection structure schematic diagram is shown;

[0026] Figure 8 The lap joint piece connection structure schematic diagram is shown. DETAILED DESCRIPTION

[0027] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and drawings.

[0028] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions regarding the present application, but the terms can be changed according to the intention of those skilled in the art, precedents, or new technology in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meanings thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present application.

[0029] Referring to Figures 1-6 , the present embodiment provides a nuclear fuel assembly protection sleeve, comprising a protective assembly 1, comprising an outer cylinder 11, a containing piece 12 arranged inside the outer cylinder 11, a closing piece 13 arranged at both ends of the outer cylinder 11, and a pressing piece 14 arranged at one end of the containing piece 12.

[0030] The nuclear fuel assembly is a core component for a nuclear reactor in a nuclear power plant, and when the nuclear fuel assembly is bombarded by neutrons in the reactor, a nuclear fission reaction occurs, releasing a large amount of energy for heating water to produce steam, which in turn drives a turbine to generate electricity; the nuclear fuel assembly can be placed inside the containing piece 12, and the nuclear fuel assembly inside the containing piece 12 can be pressed by the pressing piece 14 to increase the stability of the nuclear fuel assembly, and the closing piece 13 can close both ends of the outer cylinder 11 to prevent the nuclear fuel assembly from scattering.

[0031] The outer cylinder 11 is preferably a hollow cylindrical cylinder, which is stable and convenient to manufacture; the containing member 12 is arranged inside the outer cylinder 11 and fixedly connected with the inner wall of the outer cylinder 11; the pressing member 14 is arranged inside the outer cylinder 11 and connected with one end of the containing member 12; and the closing member 13 is movably connected with both ends of the outer cylinder 11.

[0032] As an optional embodiment, the containing member 12 comprises a pipe body 121 arranged inside the outer cylinder 11, and a cavity 122 arranged inside the pipe body 121.

[0033] As shown in Figure 4 , Figure 5 , the pipe body 121 is a square hollow pipe with both ends open, and the cavity 122 inside is used to contain the nuclear fuel assembly. The size and shape of the cavity 122 are matched with the size and shape of the nuclear fuel assembly, so as to ensure that the nuclear fuel assembly can be correctly placed and properly supported, and also to avoid the shaking of the nuclear fuel assembly during transportation.

[0034] As an optional embodiment, a plurality of partitions 123 are arranged between the outer cylinder 11 and the pipe body 121.

[0035] As shown in Figure 4 , Figure 5 , the pipe body 121 is connected with the outer cylinder 11 through the plurality of partitions 123, and the partitions 123 are arranged at intervals inside the outer cylinder 11, thereby dividing the entire space inside the outer cylinder 11 into a plurality of small independent areas, so as to improve the rigidity and anti-deformation ability of the entire structure and ensure the stability and uniformity of the nuclear fuel assembly during transportation.

[0036] As an optional embodiment, the outer cylinder 11 is provided with a sealing flange 111 at both ends, and the outer wall of the sealing flange 111 is embedded with a sealing ring 112.

[0037] As shown in Figure 6 , the sealing flange 111 is mounted on the outer wall of the outer cylinder 11 at both ends, which can prevent the radiation leakage that may occur during the transportation or storage of the nuclear fuel assembly. The sealing ring 112 provides the necessary sealing performance to ensure that no leakage occurs during the connection and disassembly process. The sealing flange 111 and the sealing ring 112 help to enhance the structural integrity of the entire protection assembly 1, ensure the closure of both ends of the outer cylinder 11, prevent the influence of the external environment on the internal nuclear fuel assembly, and also protect the internal nuclear fuel assembly from external impact.

[0038] As an optional embodiment, the closing member 13 comprises end covers 131 arranged at both ends of the outer cylinder 11, and one of the end covers 131 is provided with a handle 132.

[0039] As shown in Figure 3As shown, the outer cylinder 11 is movably connected with end covers 131 at both ends, one of the end covers 131 is provided with a handle away from the outer wall of the outer cylinder 11, which is convenient for the staff to disassemble or open the end cover 131, and further disassemble the internal nuclear fuel assembly.

[0040] As an optional embodiment, the end cover 131 is detachably connected with the sealing flange 111 through bolts.

[0041] As shown, Figure 3 the sealing flange 111 and the end cover 131 are fastened and connected through bolts, which can make the assembly and disassembly process of the protection assembly 1 more convenient and fast, and the bolt connection can allow a certain movement space between the end cover 131 and the sealing flange 111, which is helpful to adapt to the material expansion or contraction caused by temperature change, thereby maintaining long-term sealing performance.

[0042] As an optional embodiment, the pressing part 14 includes a fixing bolt 141 provided at one end of the pipe body 121, and the outer wall of the fixing bolt 141 is movably provided with a connecting plate 142.

[0043] As shown, Figure 6 the fixing bolt 141 is preferably provided with two, which are diagonally arranged on the outer wall of the pipe body 121 away from the handle 132, and the two sides of the connecting plate 142 connected with the fixing bolt 141 are movably provided with nuts, which can be used to adjust the distance between the connecting plate 142 and the pipe body 121.

[0044] As an optional embodiment, a plurality of adjusting bolts 143 are provided through the outer wall of the connecting plate 142, and the one end of the plurality of adjusting bolts 143 is provided with a pressing plate 144.

[0045] As shown, Figure 6 the plurality of adjusting bolts 143 are provided through the connecting plate 142, the outer wall of the connecting plate 142 is provided with corresponding threaded holes, the outer wall of the one end of the plurality of adjusting bolts 143 is provided with the pressing plate 144, and the pressing plate 144 can be directly contacted with the nuclear fuel assembly. The pressing plate 144 is pressed against the nuclear fuel assembly by adjusting the length of the adjusting bolt 143, so as to fix the position of the nuclear fuel assembly and prevent displacement or damage of the nuclear fuel assembly due to vibration or impact during transportation.

[0046] In use, the nuclear fuel assembly is placed inside the cavity 122, the distance between the connecting plate 142 and the fixing bolt 141 is adjusted, the pressing plate 144 is appropriately pressed against the nuclear fuel assembly by adjusting the adjusting bolt 143, the stability of the assembly during transportation is ensured, the closing part 13 is further installed at both ends of the outer cylinder 11, and the sealing flange 111 and the end cover 131 are movably connected through bolts to achieve good sealing effect.

[0047] Referring to Figures 1-8This embodiment provides a transportation device, including a support component 2, including a base 21 and a connecting member 22; the outer wall of the base 21 is provided with a positioning hole 211, the top of the base 21 is provided with a connecting rib plate 212, and the two sides of the base 21 are provided with arc-shaped surfaces 213.

[0048] like Figure 7 As shown, the positioning hole 211 is formed through the outer wall of the base for positioning and guidance. When it is necessary to flip the nuclear fuel assembly from a horizontal position to a vertical position, a flipping platform will be used. In this case, the positioning hole 211 is used to accurately position the protective assembly 1 on the flipping platform to ensure stability and accuracy during the flipping process. The arc-shaped surface 213 matches the arc shape of the outer cylinder 11. During transportation, the side of the outer cylinder 11 is welded to the arc-shaped surface 213. The connecting stiffener 212 is used to connect and fix the outer cylinder 11 to ensure that the protective assembly 1 is firmly fixed on the base 21. With the line of symmetry of the two arc-shaped surfaces 213 as the central axis of the support assembly 2, the distance from the outer edge of the base 21 to the central axis is greater than the distance from the outer edge of the connecting stiffener 212 to the central axis.

[0049] As an optional embodiment, the lap joint 22 includes a slot 221 opened at the bottom of the base 21, and a lifting lug 222 is provided on the outer wall of the connecting stiffener 212. The lifting lug 222 can be movably engaged with the slot 221 opened at the bottom of another base 21.

[0050] like Figure 7 , Figure 8 As shown, the lap joint 22 allows multiple nuclear fuel assemblies to be stacked vertically, thereby saving space and improving transportation efficiency. The stability of the stack can be ensured by the cooperation of the lifting lug 222 and the slot 221. The slot 221 opened at the bottom of the base 21 can ensure that the lifting lug 22 can be smoothly inserted and locked in the proper position to achieve stable stacking.

[0051] In use, the sides of the two outer cylinders 11 are welded to the arc-shaped surface 213, which can stably fix the two outer cylinders 11 above the base 21 to form a set. The lifting lugs 2 are connected to the lifting slings for lifting. The slot 221 at the bottom is matched with another set of lifting lugs 22, which can realize the vertical stacking and transportation of the two sets of nuclear fuel assembly protective sleeves, thereby improving transportation efficiency and space utilization, and greatly reducing the potential risks of bumps and impacts to nuclear fuel assemblies during transportation.

[0052] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A nuclear fuel assembly protection sleeve characterized by: The application relates to a protective assembly (1) for nuclear fuel assemblies. The protective assembly (1) comprises an outer cylinder (11), a containing part (12) arranged in the outer cylinder (11), closing parts (13) arranged at two ends of the outer cylinder (11) and a pressing part (14) arranged at one end of the containing part (12). Nuclear fuel assemblies can be arranged in the containing part (12), and the nuclear fuel assemblies in the containing part (12) can be pressed by the pressing part (14), and the closing parts (13) can close the two ends of the outer cylinder (11).

2. The nuclear fuel assembly protective sleeve of claim 1, wherein: The containing part (12) comprises a pipe body (121) arranged in the outer cylinder (11), and a cavity (122) is arranged in the pipe body (121).

3. The nuclear fuel assembly protective sleeve of claim 2, wherein: A plurality of partitions (123) are arranged between the outer cylinder (11) and the pipe body (121).

4. The nuclear fuel assembly protective sleeve of claim 3, wherein: Sealing flanges (111) are arranged at the two ends of the outer cylinder (11), and sealing rings (112) are arranged on the outer walls of the sealing flanges (111).

5. The nuclear fuel assembly protective sleeve of claim 4, wherein: The closing parts (13) comprise end covers (131) arranged at the two ends of the outer cylinder (11), and one of the end covers (131) is provided with a handle (132) on the outer wall.

6. The nuclear fuel assembly protective sleeve of claim 5, wherein: The end cover (131) and the sealing flange (111) are detachably connected by bolts.

7. The nuclear fuel assembly protective sleeve of claim 6, wherein: The pressing part (14) comprises a fixing bolt (141) arranged at one end of the pipe body (121), and a connecting plate (142) is movably arranged on the outer wall of the fixing bolt (141).

8. The nuclear fuel assembly protective sleeve of claim 7, wherein: A plurality of adjusting bolts (143) are arranged on the outer wall of the connecting plate (142), and a pressing plate (144) is arranged at one end of the adjusting bolts (143).

9. A transport device characterized by: The application further relates to a support assembly (2) comprising a base (21) and a lapping part (22). The outer wall of the base (21) is provided with a positioning hole (211), the top of the base (21) is provided with a connecting rib plate (212), and the two sides of the base (21) are provided with arc surfaces (213). The lapping part (22) comprises a notch (221) arranged at the bottom of the base (21), the outer wall of the connecting rib plate (212) is provided with a lifting lug (222), and the lifting lug (222) is movably matched with the notch (221) arranged at the bottom of another base (21).

10. The transport apparatus of claim 9, wherein: ​

Images