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CN-122000097-A - Nuclear fuel grid automatic assembly system and method based on self-adaptive clamping mechanism

CN122000097ACN 122000097 ACN122000097 ACN 122000097ACN-122000097-A

Abstract

The application provides an automatic assembling system and method for a nuclear fuel grid based on self-adaptive clamping mechanisms, wherein the assembling system is used for splicing a first strip and a second strip into a grid along two mutually perpendicular directions, the automatic assembling system comprises a base, a plurality of clamping mechanisms are distributed on the base at equal intervals, each clamping mechanism comprises a first baffle and a second baffle, a first gap is reserved between each group of the first baffle and the second baffle, the first baffle is fixed with the base, a plurality of inserting grooves are formed in the first baffle and the second baffle at equal intervals, two driving pieces are arranged on the base, driving ends of the driving pieces are fixed with the second baffle and used for driving the second baffle to move, each second baffle is driven to synchronously move by the driving pieces, the first strips are clamped together with the first baffle, the first strips are aligned automatically, the clamping is carried out again after the second strips are inserted, the whole accuracy of the grid after the splicing is ensured, manpower is saved, and meanwhile, the stability of the grid is ensured.

Inventors

  • DUAN SHUYONG
  • HE ZIYI
  • LEI CONGYI
  • LU QING

Assignees

  • 河北工业大学

Dates

Publication Date
20260508
Application Date
20260212

Claims (10)

  1. 1. An automated assembly system for nuclear fuel grids based on an adaptive clamping mechanism for splicing a first strip (101) and a second strip into a grid along two mutually perpendicular directions, respectively, characterized in that it comprises: a base (1); The clamping mechanisms are distributed on the base (1) at equal intervals along a first direction, each clamping mechanism comprises a first partition board (2) and a second partition board (3), a first gap is reserved between each group of the first partition boards (2) and the second partition boards (3), the first partition boards (2) are fixed with the base (1), a plurality of inserting grooves are formed in the first partition boards (2) and the second partition boards (3) at equal intervals along the second direction, the inserting grooves of the first partition boards (2) and the inserting grooves of the second partition boards (3) are in one-to-one correspondence along the first direction, and the second direction is perpendicular to the first direction; the driving parts (4) are arranged on the base (1) along the second direction, and the driving ends of the driving parts (4) are respectively fixed with the second partition boards (3) and used for driving the second partition boards (3) to move along the first direction so as to adjust the size of the first gap.
  2. 2. The automated nuclear fuel grid assembly system based on an adaptive clamping mechanism of claim 1, further comprising a guide device comprising: The guide posts (5), two said guide posts (5) are distributed on said base (1) along said second direction, the said guide post (5) extends along said first direction; The guide sleeve (6), the guide sleeve (6) is slidably sleeved on the guide post (5), and the guide sleeve (6) is fixed with the driving end of the driving piece (4).
  3. 3. The automated nuclear fuel grid assembly system based on the adaptive clamping mechanism according to claim 2, wherein a plurality of grooves (61) are arranged on the guide sleeve (6) at equal intervals along the first direction, and the grooves (61) are in one-to-one correspondence with the first gaps along the second direction.
  4. 4. The automatic assembling system for the nuclear fuel grids based on the self-adaptive clamping mechanism according to claim 3, wherein the guide sleeve (6) is provided with positioning pins (7), and a plurality of positioning pins (7) are sequentially arranged in the grooves (61).
  5. 5. The automated assembly system of nuclear fuel grids based on adaptive clamping mechanisms as claimed in claim 2, wherein said base (1) comprises: The bearing platform is provided with the first partition board (2); the four stand columns (11) are respectively arranged at four corners of the bearing platform, the slide rails are arranged on the two stand columns (11) corresponding to the first direction, and the driving piece (4) is further arranged on the stand columns (11).
  6. 6. An automated assembly system for nuclear fuel grids based on adaptive clamping mechanisms according to claim 3, characterized in that the guide posts (5) are sleeved with elastic members (8), the elastic members (8) being arranged between the upright posts (11) and the ends of the guide sleeves (6) far from the driving members (4).
  7. 7. The automated nuclear fuel grid assembly system based on an adaptive clamping mechanism according to claim 1, further comprising a mold stripping mechanism (9), wherein the mold stripping mechanism (9) comprises a first part, a second part and a third part which are integrally connected, the first part can be sleeved on a plurality of the clamping mechanisms along a vertical direction, and the second part and the third part are respectively arranged at two ends of the first part along the first direction.
  8. 8. The automated assembly system for nuclear fuel grids based on adaptive clamping mechanisms according to claim 1, characterized in that each group of the first and second spacers (2, 3) is provided with an arc-shaped groove (21) on the side close to each other, said arc-shaped groove (21) being adapted to the external surface profile of the first strip (101).
  9. 9. The automated nuclear fuel grid assembly system based on an adaptive clamping mechanism according to claim 1, wherein a detection member is provided on the clamping mechanism, the detection member being electrically connected to a controller for detecting the pressure at the first gap and generating a first detection signal, the controller being configured to control the driving member (4) in accordance with the first detection signal.
  10. 10. An automated assembly method for a nuclear fuel grid based on an adaptive clamping mechanism, using the automated assembly system for a nuclear fuel grid based on an adaptive clamping mechanism according to any one of claims 1 to 9, characterized in that the assembly method comprises: Sequentially inserting a plurality of first strips (101) into the first gaps along the first direction, so that the openings of the first strips (101) correspond to the inserting grooves along the first direction; driving each second partition plate (3) to move along the first direction by the driving piece (4) until the pressure exerted by the first strip (101) in the first direction reaches a first set pressure; sequentially inserting a plurality of second strips into the inserting grooves along the second direction, so that the openings of the second strips correspond to the openings of the first strips (101) and are spliced to form a grid; Driving each second partition plate (3) to move along the first direction again through the driving piece (4) until the pressure born by the first strip (101) in the first direction reaches a second set pressure, wherein the second set pressure is larger than the first set pressure; stopping the drive (4) and separating the grid from the assembly system.

Description

Nuclear fuel grid automatic assembly system and method based on self-adaptive clamping mechanism Technical Field The application relates to the technical field of nuclear fuel grids, in particular to an automatic assembling system and method for a nuclear fuel grid based on a self-adaptive clamping mechanism. Background Nuclear fuel assemblies are the core components of nuclear reactors, whose performance is directly related to the operational safety and economy of the reactor. The spacer grid is a key component of the fuel assembly, and is formed by precisely splicing and welding a plurality of outer strips and inner strips to form a grid array for fixing the fuel rods and guiding the coolant to flow. At present, the assembly of the grillwork is mostly carried out manually, but when the strips are spliced by the manual work, precious metal coatings (such as zirconium alloy) on the surfaces of the strips are easily misplaced, misplaced or damaged due to visual fatigue or operation errors, the final size and welding quality of the grillwork are affected, the product quality is too dependent on the proficiency of operators, and further, the consistency is poor, and the batch stability is difficult to ensure. Disclosure of Invention The application aims to solve the problems and provide an automatic assembling system and method for a nuclear fuel grid based on an adaptive clamping mechanism. In a first aspect, the present application provides an automated assembly system for nuclear fuel grids based on an adaptive clamping mechanism for splicing a first strip and a second strip into a grid in two mutually perpendicular directions, respectively, the assembly system comprising: A base; The clamping mechanisms are distributed on the base at equal intervals along a first direction, each clamping mechanism comprises a first partition plate and a second partition plate, a first gap is reserved between each group of the first partition plates and the second partition plates, the first partition plates are fixed with the base, a plurality of inserting grooves are formed in the first partition plates and the second partition plates at equal intervals along a second direction, the inserting grooves of the first partition plates and the inserting grooves of the second partition plates are in one-to-one correspondence along the first direction, and the second direction is perpendicular to the first direction; the driving parts are arranged on the base along the second direction, and the driving ends of the driving parts are respectively fixed with the second partition plates and used for driving the second partition plates to move along the first direction so as to adjust the size of the first gap. According to some embodiments of the present application, there is provided a guide device, including: the guide posts are distributed on the base along the second direction, and extend along the first direction; The guide sleeve is arranged on the guide post in a sliding sleeve manner, and the guide sleeve is fixed with the driving end of the driving piece. According to some embodiments of the present application, a plurality of grooves are provided on the guide sleeve at equal intervals along the first direction, and the grooves correspond to the first gaps one by one along the second direction. According to some embodiments of the present application, the guide sleeve is provided with a positioning pin, and a plurality of positioning pins are sequentially disposed in each groove. According to some embodiments of the present application, the base includes: the bearing platform is provided with the first partition board; The four stand columns are respectively arranged at four corners of the bearing platform, the slide rails are arranged on the two stand columns corresponding to the first direction, and the driving piece is further arranged on the stand columns. According to some embodiments of the present application, an elastic member is sleeved on the guide post, and the elastic member is disposed between the upright post and an end portion of the guide sleeve away from the driving member. According to the technical scheme provided by certain embodiments of the application, the device further comprises a demolding mechanism, wherein the demolding mechanism comprises a first part, a second part and a third part which are integrally connected, the first part can be sleeved on the clamping mechanisms along the vertical direction, and the second part and the third part are respectively arranged at two ends of the first part along the first direction. According to some embodiments of the present application, one side of each group of the first partition board and one side of each group of the second partition board, which are close to each other, are respectively provided with an arc-shaped groove, and the arc-shaped groove is adapted to an outer surface contour of the first strip. According to the technical scheme provided by c