CN103474119B - Nuclear fuel assembly cask - Google Patents

Abstract

The invention relates to a transport container for nuclear fuel assemblies, comprising an upper casing (1) and a lower casing (2), the upper casing (1) and the lower casing (2) are connected by a connecting piece, and the casing is equipped with There is a shock absorbing device and a support frame (5) for fixing the nuclear fuel assembly, the shock absorbing device is fixed on the lower casing (2), the support frame (5) is arranged on the shock absorbing device, and the support frame One end is hinged to the shock absorbing device, and the other end is connected to the shock absorbing device through bolts. The support frame (5) is provided with a protective plate for protecting the nuclear fuel assembly. Adopting the technical scheme of the present invention can reduce the impact of the vibration generated in the transportation process on the nuclear fuel assembly in the transportation container. The transportation container not only has good shock absorption performance, but also is easy to operate; The problem of protection against axial impact loads ensures the safety of nuclear fuel assembly transportation.

Description

Nuclear Fuel Assembly Shipping Containers

technical field

The invention belongs to the field of dangerous cargo transportation, and in particular relates to a nuclear fuel assembly transportation container.

Background technique

During the transportation of nuclear fuel assemblies, it is necessary to ensure the safety of transportation. Under normal transportation conditions, it is necessary to ensure that the acceleration value of nuclear fuel assemblies is less than its limit value; Transport outside container to avoid hazard.

For the currently used transport containers for nuclear fuel assemblies, the inventors have found that there are at least the following problems in the prior art: there is no transport container specially suitable for nuclear fuel assembly transport containers, which has good shock absorption performance and is easy to operate.

Contents of the invention

In view of the defects existing in the prior art, the purpose of the present invention is to provide a nuclear fuel assembly transport container, which can reduce the impact of the vibration generated in the transport process on the nuclear fuel assembly in the transport container, has good shock absorption performance, is easy to operate, and can Ensure the safety of transportation of nuclear fuel assemblies.

In order to achieve the above purpose, the technical solution adopted by the present invention is to provide a nuclear fuel assembly transport container, including an upper shell and a lower shell, the upper shell and the lower shell are connected by a connecting piece, and a shock absorber is provided inside the shell. device and a support frame for fixing the nuclear fuel assembly, the shock absorber is fixedly connected to the lower casing, the support frame is arranged on the shock absorber, one end of the support frame is hinged with the shock absorber, and the other end is connected with the shock absorber The vibration device is connected by bolts, the support frame is provided with a protection plate for protecting the nuclear fuel assembly, the protection plate is fastened on the outside of the support frame, and several ribs are provided on the protection plate.

Further, the top and the lower part of the protective plate are respectively provided with a top support plate and a side support plate, and the top support plate and the side support plate are respectively connected with the top support and the side support, and the top support and the side support are respectively Fixed connection with the support frame.

Further, the top support plate is connected to the top support by bolts; the side support plate is movably connected to the side support by pins.

Further, the support frame is provided with a transverse pressing device for supporting and fixing the nuclear fuel assembly.

Further, both ends of the upper shell and the lower shell are respectively provided with reinforcing plates for absorbing the impact energy of the ends.

Further, it also includes a length-adjustable support device for ensuring the vertical posture of the support frame during vertical operation, and the support device is fixedly connected to the lower casing.

Further, the support frame and the shock absorbing device are hinged by a support shaft, and a locking mechanism of the support frame is provided below the support shaft.

Further, the top of the upper casing is provided with a placement bracket.

Further, the bottom of the lower casing is provided with supporting legs.

The beneficial technical effects of the present invention are:

(1) By providing a support frame and a shock absorber in the upper shell and the lower shell, the nuclear fuel assembly is loaded in the support frame, and the support frame is set on the shock absorber to ensure the safety of the nuclear fuel assembly during transportation and stability;

(2) By providing a protective plate on the support frame, the protection problem of the impact load perpendicular to the axial direction of the fuel assembly during transportation is solved, and the nuclear fuel assembly can be protected;

(3) By providing reinforcement plates at the ends of the lower shell and the upper shell, it can be used to absorb the impact energy of the ends and protect the transport container;

(4) One end of the support frame is hinged with the support shaft and the shock absorber, and can be turned over to facilitate the loading and unloading of fuel assemblies.

Description of drawings

Fig. 1 is a side view of the nuclear fuel assembly transport container of the present invention;

Fig. 2 is a partial sectional view of the nuclear fuel assembly transport container of the present invention;

Fig. 3 is the front view of the nuclear fuel assembly transport container of the present invention in the vertical operation state;

Fig. 4 is a side view of the nuclear fuel assembly transport container of the present invention in a vertical operating state;

Fig. 5 is a schematic structural view of the protective plate of the nuclear fuel assembly transport container of the present invention;

Fig. 6 is a schematic diagram of the combined use of the protective plates of the nuclear fuel assembly transport container of the present invention.

Among them: 1-upper shell 2-lower shell 3-placement bracket 4-reinforcing plate

5-support frame 6-shock absorbing frame 7-shock absorber 8-transverse compression device

9-protection plate 10-support shaft 11-locking mechanism 12-support leg

13 Support rod 14-top support plate 15-side support plate 16-top bracket

17-side bracket 18-rib plate

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1-3, the nuclear fuel assembly transport container provided by the present invention includes an upper shell 1 and a lower shell 2, the upper shell 1 and the lower shell 2 are connected by bolts, and the shell is provided with a shock absorber and a On the support frame 5 for fixing the nuclear fuel assembly, the shock absorber includes a shock absorber 7 and a shock absorber frame 6, the shock absorber 7 is fixed on the shock absorber frame 6, the shock absorber 7 is fixed on the lower casing 2, and the support frame 5 is arranged on the shock-absorbing frame 6, and one end of the support frame 5 is hinged with the shock-absorbing frame 6 through the support shaft 10, and the other end is connected with the shock-absorbing frame 6 through a joint bolt. Wherein, a locking mechanism 11 of the support frame 5 is also provided below the support shaft 10 to connect the lower housing 2 and the shock-absorbing frame 6 during vertical loading and unloading, so as to facilitate the fixed support of the support frame 5 during vertical loading and unloading.

The support frame 5 is provided with a protective plate 9 for protecting the nuclear fuel assembly. The protective plate 9 is used to protect the nuclear fuel assembly during transportation, which solves the protection problem of the impact load perpendicular to the fuel assembly axis during the transportation of the nuclear fuel assembly. As shown in Figure 5, the protection plate 3 is fastened on the outside of the support frame 5, and several ribs 18 are fixed on the protection plate 9; the top and bottom of the protection plate 9 are respectively provided with a top support plate 14 and a side support plate 15 , the top support plate 14 and the side support plate 15 are connected with the top support 16 and the side support 17 respectively, and the top support 16 and the side support 17 are fixedly connected with the support frame 5 respectively; the top support plate 14 and the top support 16 are connected by bolts; The side support plate 15 and the side support 17 are movably connected by pin shafts. Multiple protective plates can be used in combination to ensure the safety of the nuclear fuel assembly along its entire length, as shown in Figure 6.

The support frame 5 is provided with a lateral pressing device 8 for supporting and fixing the nuclear fuel assembly.

In order to facilitate loading and unloading, the lower casing is also provided with a length-adjustable supporting device 13 for connecting the lower casing and the support frame during vertical operation, so as to ensure the vertical posture of the support frame 5 .

Both ends of the upper shell 1 and the lower shell 2 are respectively provided with reinforcing plates 4 for absorbing impact energy at the ends and protecting the transport container.

The top of the upper casing 1 is provided with a placement bracket 3 for stacking and lifting containers.

The bottom of the lower casing 2 is provided with supporting legs 12 for supporting the container when loading and unloading nuclear fuel assemblies.

In summary, because the upper casing and the lower casing are connected to form a closed casing, it is guaranteed that the nuclear fuel assemblies will not be scattered outside the container when a traffic accident occurs; There is a shock-absorbing device, which reduces the impact of the vibration generated during transportation on the nuclear fuel assembly in the transport container; one end of the support frame and one end of the shock-absorbing device are hinged through a support shaft, and the support frame can be turned over through the support shaft to facilitate fuel assembly. The vertical loading and unloading and horizontal transportation are two working conditions; the support frame is equipped with a protective plate, which solves the protection problem of the shock load perpendicular to the axial direction of the fuel assembly during transportation, and can protect the nuclear fuel assembly.

As shown in Figures 3 and 4, when loading nuclear fuel assemblies, install the support leg 12 to a specified position; first open the upper casing 1 of the transport container, and pull out the locking mechanism 11 of the support rod to connect and fix it with the lower casing 2; Then open the bolts connecting the support frame 5 and the shock-absorbing frame 6, turn the support frame 5 around the support shaft 10 to a vertical state, connect and fix the support rod 13, and ensure that the support frame 5 is vertical; open the lateral pressing device on the support frame 5 8 and the protection plate 9, place the nuclear fuel assembly vertically in the support frame 5; fasten the horizontal pressing device 8 and the protection plate 9, loosen and bring down the support rod 13, turn the support frame 5 to a horizontal state; place the support frame 5 and the shock-absorbing frame 6 are connected by bolts to ensure that the support frame 5 and the shock-absorbing frame 6 are connected tightly, and the locking mechanism of the locking support rod 11 is released and returned; The connecting bolts of the upper shell 1 and the lower shell 2 are disassembled or rotated or contracted to the specified position to complete the operation; the container is lifted to a designated vehicle or placed at a designated position by placing the bracket 3 .

The operation process of unloading nuclear fuel is similar to the loading process, the only difference is that the nuclear fuel assembly is taken out from the support frame 5 in the vertical state.

It should be noted that the above-mentioned specific implementation methods are only exemplary. Under the above-mentioned teaching of the present invention, those skilled in the art can make various improvements and modifications on the basis of the above-mentioned embodiments, and these improvements or modifications fall within the scope of this disclosure. within the scope of protection of the invention. Those skilled in the art should understand that the above specific description is only for the purpose of explaining the present invention, and is not intended to limit the present invention. The protection scope of the present invention is defined by the claims and their equivalents.

Claims (8)

1. A transport container for nuclear fuel assemblies, characterized in that: it comprises an upper casing (1) and a lower casing (2), the upper casing (1) and the lower casing (2) are connected by a connecting piece, and the inside of the casing A shock absorbing device and a support frame (5) for fixing the nuclear fuel assembly are provided, the shock absorbing device is fixed on the lower shell (2), the support frame (5) is arranged on the shock absorbing device, and supports One end of the frame (5) is hinged with the shock absorber, and the other end is connected with the shock absorber by bolts. The support frame (5) is provided with a protective plate (9) for protecting the nuclear fuel assembly, and the protective plate (9) is fastened on the On the outer side of the support frame (5), several ribs (18) are fixed on the protection plate (9), and the top and bottom of the protection plate (9) are respectively provided with a top support plate (14) and a side support plate (15) , the top support plate (14) and the side support plate (15) are connected with the top support (16) and the side support (17) respectively, and the described top support (16) and the side support (17) are connected with the support frame respectively (5) Fixed connection. 2. The nuclear fuel assembly transport container as claimed in claim 1, said top support plate (14) is connected by bolts between said top support plate (14) and top support (16); said side support plate (15) and side support (17) are connected by pin shafts. 3. The nuclear fuel assembly transport container according to claim 1, characterized in that: the support frame (5) is also provided with a lateral pressing device (8) for supporting and fixing the nuclear fuel assembly. 4. The nuclear fuel assembly transport container according to any one of claims 1-3, characterized in that: the two ends of the upper casing (1) and the lower casing (2) are respectively provided with a reinforcement plate (4). 5. The nuclear fuel assembly transport container as claimed in claim 4, characterized in that: it also includes a support device (13) that is used to ensure the vertical posture of the support frame (5) and is adjustable in length when operating vertically, and the support device (13) ) is affixed to the lower case. 6. The nuclear fuel assembly transport container according to claim 5, characterized in that: the support frame (5) and the shock absorbing device are hinged by a support shaft (10), and a support frame (5) is provided below the support shaft (10). ) of the locking mechanism (11). 7. The nuclear fuel assembly transport container according to claim 6, characterized in that: the top of the upper casing (1) is provided with a placing bracket (3). 8. The nuclear fuel assembly transport container according to claim 7, characterized in that: the bottom of the lower casing (2) is provided with supporting legs (12).