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CN-122000096-A - Point constraint automatic assembly die for nuclear fuel assembly grillwork

CN122000096ACN 122000096 ACN122000096 ACN 122000096ACN-122000096-A

Abstract

The application provides a point constraint automatic assembly die for a nuclear fuel assembly grid, which provides a stable installation basis for a clamp body through a first space in a die frame, wherein a plurality of first channels and second channels which are arranged in a crossing manner along a first horizontal direction and a second horizontal direction are arranged on the clamp body and respectively accommodate a first strip and a second strip, a plurality of installation cavities are arranged at one side of each first channel, compression structures are arranged in the installation cavities in a one-to-one correspondence manner, and can apply uniform compression force to the first strips from the side direction under the synergistic effect of a driving structure.

Inventors

  • DUAN SHUYONG
  • ZHANG HONGZHENG
  • LEI CONGYI
  • ZHANG XIAOMIN

Assignees

  • 河北工业大学

Dates

Publication Date
20260508
Application Date
20260212

Claims (10)

  1. 1. A point-constrained automated assembly mold for a nuclear fuel assembly grid, comprising: a mold frame (1), wherein a first space is formed inside the mold frame (1); The clamp comprises a clamp body (2), wherein the clamp body (2) is arranged in a first space, a plurality of first channels (3) extending along a first horizontal direction are formed in the clamp body (2), the first channels (3) are used for accommodating first strips (16), a plurality of second channels (4) extending along a second horizontal direction are formed in the clamp body (2), the second channels (4) are used for accommodating second strips (17), the first channels (3) and the second channels (4) are arranged in a crossing mode, and the first horizontal direction is perpendicular to the second horizontal direction; one side of each first channel (3) is provided with a plurality of mounting cavities (5), the mounting cavities (5) are communicated with the first channels (3), and the mounting cavities (5) are arranged in a first horizontal direction; The flexible compressing device comprises a driving structure and a plurality of compressing structures, wherein the compressing structures are arranged in the mounting cavity (5) in a one-to-one correspondence manner, the driving structure is connected with the compressing structures, and the driving structure is used for driving the compressing structures to apply uniform compressing force to the corresponding first strips (16) in the lateral direction.
  2. 2. The automated assembly mold for the spot constraint of a nuclear fuel assembly grid of claim 1, wherein the compression structure comprises: the fixed top block (6), the fixed top block (6) is fixedly arranged at the top of the installation cavity (5); The transmission jack post (8) is movably arranged in the mounting cavity (5), and one end of the transmission jack post (8) far away from the fixed jack block (6) extends out of the mounting cavity (5) to be connected with the driving structure, and one end of the fixed jack block (6) and one end of the transmission jack post (8) close to each other form an extrusion space together; A pressing member (7), the pressing member (7) being disposed in the pressing space; The driving structure is used for driving the transmission jack post (8) to move towards the direction of the fixed jack block (6), so that the extrusion space is driven to extrude the compression piece (7), and the compression piece (7) is further enabled to apply uniform compression force to the corresponding first strip (16).
  3. 3. A point-constrained automatic assembly mould for nuclear fuel assembly grids according to claim 2, characterized in that the inner walls of the extrusion spaces are provided with elastic gaskets (9).
  4. 4. A point-constrained automatic assembly mould for nuclear fuel assembly grids according to claim 3, characterized in that the outer surface of the compacting element (7) is provided with a friction-reducing coating for reducing the friction between the compacting element (7) and the first strip (16) and/or the extrusion space.
  5. 5. The automated assembly mold for the spot constraint of a nuclear fuel assembly grid of claim 2, wherein the drive structure comprises: The driving plate (10) is arranged at the bottom of the frame, and the driving plate (10) is fixedly connected with all the transmission jacking columns (8); The first driving piece is connected with the driving plate (10), and is used for driving the driving plate (10) to drive the transmission jack post (8) to move in the installation cavity (5).
  6. 6. The automated assembly mold of claim 5, wherein the first driver has a force sensor disposed thereon for monitoring the output force of the first driver in real time.
  7. 7. A point-constrained automated assembly mould for nuclear fuel assembly grids according to claim 1, characterized in that said mould frame (1) comprises: a bottom plate (11); The first side plates (12) are arranged, the two first side plates (12) are respectively arranged on two sides of the bottom plate (11) along the first horizontal direction, and the first side plates (12) are provided with first accommodating grooves corresponding to the first grooves (3); The second side plates (13), the second side plates (13) are two, the two second side plates (13) are respectively arranged on two sides of the bottom plate (11) along the second horizontal direction, and the second side plates (13) are provided with second accommodating grooves corresponding to the second channels (4).
  8. 8. The automated assembly mold of a nuclear fuel assembly grid in accordance with claim 7, further comprising a grid tray (15), the grid tray (15) being movably disposed in the first space, the grid tray (15) being configured to eject the formed nuclear fuel assembly grid after assembly is completed.
  9. 9. A automated assembly mould for the spot constraint of a nuclear fuel assembly grid according to claim 8, characterized in that between each of the adjacent first side plates (12) and second side plates (13) a groove (14) is formed; The grid tray (15) comprises an outer frame (151) and at least two bearing rods (152) fixed inside the outer frame (151), wherein two side edges of the outer frame (151) extending along the second horizontal direction are respectively connected with the corresponding grooves (14) in a sliding mode, and the bearing rods (152) are used for bearing the nuclear fuel assembly grids at the bottom of the first space.
  10. 10. The automated assembly mold for the spot constraint of a nuclear fuel assembly grid according to claim 8, wherein a second driving member is connected to the grid tray (15), the second driving member is used for driving the grid tray (15) to move in a vertical direction, and a displacement sensor is arranged on the second driving member and is used for detecting the displacement of the grid tray (15).

Description

Point constraint automatic assembly die for nuclear fuel assembly grillwork Technical Field The application relates to the technical field of assembly grillwork assembly, in particular to a point constraint automatic assembly die for a nuclear fuel assembly grillwork. Background The assembling of the nuclear fuel grid strips is a core link in the production of nuclear fuel, and the core aim is to accurately assemble and fix thin-wall metal strips with various specifications to form a nuclear fuel grid with honeycomb grid units, wherein the nuclear fuel grid is a framework of a nuclear fuel assembly, the clamping, positioning and interval maintaining functions of the fuel rods are carried out, meanwhile, the flowing state of the coolant is optimized through the integrated stirring wings, and the assembly quality directly determines the safety, the thermodynamic conversion efficiency and the long-term reliability of the operation of the reactor. In the prior art, the nuclear fuel grid strip is usually formed by stamping a thin-wall metal plate, and is very easy to generate elastic or plastic deformation in the clamping process due to insufficient structural rigidity caused by material characteristics, while the traditional rigid clamp is very easy to form indentation and scratch on the surface of the strip and even cause integral bending of the strip to seriously damage the mechanical property and structural integrity if the clamping force is lack of accurate control in the compression operation. In addition, the rigid clamps introduce additional assembly stresses during assembly, which, if released during subsequent operation, may cause instability of the lattice structure, potentially threatening the safety of the nuclear fuel assembly. Disclosure of Invention In view of the above-described drawbacks or shortcomings in the prior art, it is desirable to provide a point-constrained automated assembly mold for a nuclear fuel assembly grid that addresses the above-described technical problems. The application provides a point constraint automatic assembly die for a nuclear fuel assembly grid, which comprises the following components: A mold frame having a first space inside; the clamp comprises a clamp body, a plurality of first grooves, a plurality of second grooves, a plurality of first guide rails, a plurality of second guide rails and a plurality of first guide rails, wherein the clamp body is arranged in the first space, the clamp body is provided with a plurality of first grooves extending along a first horizontal direction and used for accommodating first strips, and the clamp body is provided with a plurality of second grooves extending along a second horizontal direction and used for accommodating second strips; one side of each first channel is provided with a plurality of mounting cavities, the mounting cavities are communicated with the first channels, and the mounting cavities are arranged in a row along the first horizontal direction; the flexible compressing device comprises a driving structure and a plurality of compressing structures, wherein the compressing structures are arranged in the mounting cavity in a one-to-one correspondence mode, the driving structure is connected with the compressing structures, and the driving structure is used for driving the compressing structures to apply uniform compressing force to the corresponding first strips in the lateral direction. According to the technical scheme provided by the application, the compressing structure comprises: The fixed top block is fixedly arranged at the top of the mounting cavity; The transmission jack post is movably arranged in the mounting cavity, and one end of the transmission jack post, which is far away from the fixed jack block, extends out of the mounting cavity and is connected with the driving structure; The pressing piece is arranged in the extrusion space; the driving structure is used for driving the transmission jack post to move towards the direction of the fixed jack block, so that the extrusion space is driven to extrude the compression piece, and the compression piece is further enabled to apply uniform compression force to the corresponding first strip. According to the technical scheme provided by the application, the elastic gasket is arranged on the inner wall of the extrusion space. According to the technical scheme provided by the application, the outer surface of the pressing piece is provided with the antifriction coating, and the antifriction coating is used for reducing friction force between the pressing piece and the first strip and/or the extrusion space. According to the technical scheme provided by the application, the driving structure comprises: the driving plate is arranged at the bottom of the frame and is fixedly connected with all the transmission jacking columns; the first driving piece is connected with the driving plate and used for driving the driving plate to drive the transmission jack