CN-121983367-A - Connection structure and nuclear fuel assembly transport container

CN121983367ACN 121983367 ACN121983367 ACN 121983367ACN-121983367-A

Abstract

The application discloses a connecting structure and a nuclear fuel assembly transportation container, wherein the nuclear fuel assembly transportation container comprises a shell and an inner member, the shell and the inner member are connected through a plurality of shock absorbers, a rigid connecting structure is arranged between the shell and the inner member, the rigid connecting structure comprises a supporting sleeve arranged on the shell and a fixing sleeve arranged on the inner member, the supporting sleeve and the fixing sleeve are oppositely arranged, a rigid supporting rod is arranged on the fixing sleeve in a penetrating manner, and part of the supporting rod can extend out of the fixing sleeve and be connected into the supporting sleeve. The connecting structure and the nuclear fuel assembly transport container provided by the application have the advantages that the rigid connecting structure between the inner member and the shell is disconnected in the transport process, the stability and the safety in the transport process are improved, the supporting rod is connected to the supporting sleeve in the loading and unloading process, the rigid fixation between the inner member and the shell is realized, and the loading and unloading reliability is ensured.

Inventors

CAI DUAN
CHEN BAOHUA
WU TENG
WU TAO
LI QIPENG
YE LIANG
XU JUNXIANG
PENG YUNJIE
LIU YICHENG
JIANG ZUFU

Assignees

中广核研究院有限公司
中国广核电力股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260127

Claims (10)

1. A connection structure for connecting a housing (13) and an inner member (14) of a transport container for nuclear fuel assemblies, characterized in that it comprises a shock absorber (11) and a rigid connection structure (12) for connecting the housing (13) and the inner member (14); Wherein, rigid connection structure (12) is including being used for setting up support sleeve (3) on casing (13), and be used for setting up fixed cover (5) on inner member (14), support sleeve (3) with fixed cover (5) set up relatively, fixed cover (5) orientation support sleeve (3) one end opening and wear to be equipped with rigid bracing piece (4), bracing piece (4) slidable setting, bracing piece (4) can partly stretch out fixed cover (5) and be connected to in support sleeve (3).
2. A connecting structure according to claim 1, characterized in that the support bar (4) is provided with a locking assembly (6) for locking the support bar (4) to the fixing sleeve (5).
3. The connecting structure according to claim 2, wherein the locking assembly (6) comprises a switch connecting rod (10) arranged on the supporting rod (4), a locking pressing block (7) is arranged on the switch connecting rod (10) in a penetrating mode, a spring positioning ring (8) is arranged at one end, far away from the supporting rod (4), of the switch connecting rod (10), a spring (9) is arranged between the locking pressing block (7) and the spring positioning ring (8), and the spring (9) pushes the locking pressing block (7) towards the direction of the supporting rod (4).
4. A connecting structure according to claim 3, characterized in that the fixing sleeve (5) is provided with a U-shaped groove, the length of the U-shaped groove extends along the sliding direction of the supporting rod (4), the switch connecting rod (10) of the locking assembly (6) can move along the U-shaped groove, the width of the U-shaped groove is larger than the diameter of the switch connecting rod (10), and the width of the U-shaped groove is smaller than the diameter of the locking pressing block (7).
5. The connecting structure according to claim 1, wherein the supporting rod (4) and the supporting sleeve (3) are respectively provided with a first screw hole and a second screw hole which are corresponding to each other, and when the supporting rod (4) is connected into the supporting sleeve (3), the positions of the first screw hole and the second screw hole are opposite, and a bolt passing through the first screw hole and the second screw hole fixedly connects the supporting rod (4) and the supporting sleeve (3).
6. The connecting structure according to claim 1, characterized in that the fixing sleeve (5) is fixedly connected to the inner member (14) by means of bolts.
7. The connecting structure according to claim 1, characterized in that a positioning block (2) is provided on the supporting sleeve (3), and the supporting sleeve (3) is fixed on the housing (13) through the positioning block (2).
8. The connecting structure according to claim 7, wherein the positioning block (2) is provided with a positioning sealing plate (1), the positioning block (2) and the positioning sealing plate (1) together define a slot, the housing (13) is provided with a connecting projection corresponding to the slot, and the slot is inserted in the connecting projection.
9. A connecting structure according to claim 1, characterized in that the opening of the fixing sleeve (5) towards the supporting sleeve (3) is provided with a bevel.
10. A nuclear fuel assembly transport container comprising a housing (13) and an inner member (14), characterized by further comprising a connecting structure according to any one of claims 1 to 9 for connecting the housing (13) and the inner member (14).

Description

Connection structure and nuclear fuel assembly transport container Technical Field The application relates to the field of nuclear fuel transportation, in particular to a connecting structure and a nuclear fuel assembly transportation container. Background Fuel assembly transport containers are key devices in the nuclear energy field for safe transport and storage of nuclear fuel, the core function of which is to ensure stability and safety of the fuel assembly during transport and efficiency in handling operations. In recent years, the design of fuel assembly transport containers has gradually evolved to a lightweight, modular orientation to accommodate the transport demands in complex environments. However, in practical applications, the manner of connection between the internal components of the fuel assembly transport container and the housing remains a critical technical difficulty. In the prior art, rigid fixed connection is generally adopted, but in the use process, the rigid connection aggravates the influence of external vibration and impact, and can not effectively buffer internal micro vibration and temperature change, so that stress concentration can be generated at the joint of an inner member and a shell, and structural fatigue and even damage can be caused after long-time operation. Disclosure of Invention In order to solve one of the technical problems in the prior art, the application provides a connecting structure and a nuclear fuel assembly transport container, which avoid the structural damage problem caused by the traditional rigid fixing mode on the premise of ensuring the loading and unloading reliability. According to the first aspect of the application, the connecting structure is used for connecting a shell and an inner member of a nuclear power fuel assembly transport container and comprises a shock absorber and a rigid connecting structure, wherein the shock absorber is used for connecting the shell and the inner member, the rigid connecting structure comprises a supporting sleeve and a fixing sleeve, the supporting sleeve is used for being arranged on the shell, the fixing sleeve is arranged opposite to the fixing sleeve, the fixing sleeve is open towards one end of the supporting sleeve and is provided with a rigid supporting rod in a penetrating mode, and the supporting rod can be arranged in a sliding mode and can partially extend out of the fixing sleeve and is connected into the supporting sleeve. According to the connecting structure provided by the first aspect of the application, the supporting rod is provided with the locking component used for locking the supporting rod on the fixing sleeve. According to the connecting structure provided by the first aspect of the application, the locking assembly comprises the switch connecting rod arranged on the supporting rod, the switch connecting rod is provided with the locking pressing block in a penetrating way, one end of the switch connecting rod, which is far away from the supporting rod, is provided with the spring positioning ring, a spring is arranged between the locking pressing block and the spring positioning ring, and the spring pushes the locking pressing block towards the direction of the supporting rod. According to the connecting structure provided by the first aspect of the application, the fixing sleeve is provided with the U-shaped groove, the length of the U-shaped groove extends along the sliding direction of the supporting rod, the switch connecting rod of the locking assembly can move along the U-shaped groove, the width of the U-shaped groove is larger than the diameter of the switch connecting rod, and the width of the U-shaped groove is smaller than the diameter of the locking pressing block. According to the connecting structure provided by the first aspect of the application, the supporting rod and the supporting sleeve are respectively provided with the corresponding first screw hole and the second screw hole, when the supporting rod is connected into the supporting sleeve, the positions of the first screw hole and the second screw hole are opposite, and the supporting rod and the supporting sleeve are fixedly connected through bolts passing through the first screw hole and the second screw hole. According to the connecting structure provided by the first aspect of the application, the fixing sleeve is fixedly connected to the inner member through the bolt. According to the connecting structure provided by the first aspect of the application, the supporting sleeve is provided with the positioning block, and the supporting sleeve is fixed on the shell through the positioning block. According to the connecting structure provided by the first aspect of the application, the positioning block is provided with the positioning sealing plate, the positioning block and the positioning sealing plate jointly define a slot, the shell is provided with the connecting convex block corresponding to the slot, and th