A welding fixture for manufacturing nuclear waste storage well shafts

Abstract

This utility model relates to the field of well casing manufacturing technology, and provides a welding fixture for manufacturing nuclear waste storage well casings. The fixture includes a well casing body, on which an internal support structure is uniformly arranged. The internal support structure includes wedge-shaped blocks, an internal support plate, and connecting grooves. The wedge-shaped blocks are uniformly arranged on the inner wall of the well casing body, and connecting grooves are formed on the side of each wedge-shaped block away from the well casing body. By providing the internal support structure, the uniformly distributed wedge-shaped blocks closely contact the inner wall of the well casing body, ensuring that the well casing body maintains a standard circular shape during welding and avoiding roundness deviations. The interlocking connection between the internal support plate and the connecting grooves forms a rigid support, reducing vibration or deformation during welding and improving structural stability. The symmetrical distribution of the wedge-shaped blocks on both sides of the internal support plate facilitates quick installation and disassembly. This device enables the device to support the welding shape of the well casing body, improving the working efficiency of the welding fixture for manufacturing nuclear waste storage well casings during use.

Description

Technical Field

[0001] This utility model relates to the field of well casing manufacturing technology, and in particular to a welding fixture for manufacturing a nuclear waste storage well casing. Background Technology

[0002] Nuclear waste storage wells serve as a critical barrier for the geological disposal of high-level radioactive waste, and their manufacturing precision and sealing directly affect the safety of long-term storage. With the growth of global nuclear power capacity and the surge in spent fuel accumulation, the International Atomic Energy Agency has imposed stringent requirements on storage containers, demanding a service life of over 60 years.

[0003] Traditional assembly and welding processes suffer from technical bottlenecks such as cylinder roundness deviation and excessive weld porosity. Furthermore, residual welding stress under high-temperature creep conditions can easily lead to stress corrosion cracking. Multi-axis collaborative clamping can achieve assembly error control and improve welding accuracy. Therefore, it is necessary to design a manufacturing and welding fixture for nuclear waste storage well cylinders. Utility Model Content

[0004] The purpose of this invention is to provide a welding fixture for manufacturing nuclear waste storage well casings, in order to solve the problem that existing welding fixtures for manufacturing nuclear waste storage well casings are prone to defects in the roundness of the casing during welding, resulting in low welding accuracy.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a manufacturing and welding fixture for a nuclear waste storage well, including a well body;

[0006] The inner wall of the well body is uniformly provided with an internal support structure, which includes a wedge block, an internal support plate and a connecting groove. The wedge blocks are uniformly provided on the inner wall of the well body, and a connecting groove is provided on the side of the wedge block away from the well body. An internal support plate is provided inside the connecting groove.

[0007] A positioning structure is provided on the outer side of the well body;

[0008] The top of the positioning structure is fixed with a limit structure.

[0009] Furthermore, the outer wall of the wedge-shaped block and the inner wall of the well body abut against each other, and the wedge-shaped blocks are symmetrically distributed on both sides of the inner support plate.

[0010] Furthermore, the inner support plate and the wedge block are connected by a connecting groove.

[0011] Furthermore, the top view of the inner support plate is annular.

[0012] Furthermore, the limiting structure includes a connecting plate, a limiting plate, and fixing bolts. The connecting plate is fixed to the top of the upper connecting rod, a limiting plate is provided on one side of the top of the connecting plate, and fixing bolts are uniformly inserted through one side of the bottom of the connecting plate.

[0013] Furthermore, the central axis of the connecting plate and the central axis of the well body are collinear, and the inner wall of the bottom side of the limiting plate and the outer wall of the top of the well body are in contact with each other.

[0014] Furthermore, the fixing bolts are evenly distributed inside the connecting plate, and the top of each fixing bolt extends to the outside of the limiting plate.

[0015] Furthermore, the positioning structure includes an upper connecting rod, a mounting plate, a connecting plate, a middle connecting rod, and a lower connecting rod. The middle connecting rod is evenly distributed at the middle position on the outer side of the well body. Both ends of the middle connecting rod are fixed with connecting plates. The side of the connecting plate away from the middle connecting rod is bolted with a mounting plate. The top of the mounting plate above the middle connecting rod is evenly fixed with an upper connecting rod, and the bottom of the mounting plate below the middle connecting rod is evenly fixed with a lower connecting rod.

[0016] Furthermore, the upper connecting rod, middle connecting rod, and lower connecting rod are all evenly distributed on the outer side of the well body.

[0017] The advantages of the nuclear waste storage wellbore manufacturing and welding fixture provided by this utility model are as follows:

[0018] By incorporating an internal support structure, evenly distributed wedge-shaped blocks are tightly pressed against the inner wall of the well body, ensuring that the well body maintains a standard circular shape during welding and avoiding roundness deviation. The interlocking connection between the internal support plate and the connecting groove forms a rigid support, which can reduce vibration or deformation during welding and improve structural stability. The wedge-shaped blocks are symmetrically distributed on both sides of the internal support plate, which facilitates quick installation and disassembly. This device enables the well body to support the welding shape of the well body, improving the working efficiency of the nuclear waste storage well manufacturing and welding tooling during use.

[0019] By setting a limiting structure, the connecting plate is collinear with the central axis of the well body, ensuring the verticality of the well body during welding. The limiting plate contacts the outer wall of the top of the well body, which can restrict the up and down movement of the well body. The fixing bolts pass through the connecting plate at equal intervals, which can improve the stability of the connection between the connecting plate and the limiting plate. This realizes that the device has the function of conveniently limiting the well body, and improves the stability of the nuclear waste storage well body manufacturing and welding tooling during use.

[0020] By incorporating a positioning structure with a centrally located connecting rod, and connecting plates at the top and bottom for mounting, the upper and lower connecting rods are respectively connected via the mounting plates. The inner walls of both the mounting plates and the connecting plates are in contact with the outer side of the well body, forming a circumferential clamping effect on the well body, thus controlling assembly errors. The equidistant distribution of the upper and lower connecting rods ensures uniform force distribution on the well body, avoiding welding errors. This device enables stable and uniform clamping and positioning of the well body, improving the convenience and efficiency of the nuclear waste storage well manufacturing and welding fixture during use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0023] Figure 3 This is a side view cross-sectional three-dimensional structural schematic diagram of the present invention;

[0024] Figure 4 This is a top-view cross-sectional three-dimensional structural diagram of the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the limiting structure and positioning structure of this utility model.

[0026] The reference numerals in the diagram are as follows: 1. Wellbore body; 2. Internal support structure; 21. Wedge block; 22. Internal support plate; 23. Connecting groove; 3. Limiting structure; 31. Connecting plate; 32. Limiting plate; 33. Fixing bolt; 4. Positioning structure; 41. Upper connecting rod; 42. Mounting plate; 43. Connecting plate; 44. Middle connecting rod; 45. Lower connecting rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-5 The present invention provides a manufacturing and welding fixture for a nuclear waste storage well, comprising a well body 1.

[0029] Reference Figures 1-5An internal support structure 2 is uniformly arranged on the inner wall of the well body 1. The internal support structure 2 includes wedge blocks 21, internal support plates 22 and connecting grooves 23. The wedge blocks 21 are uniformly arranged on the inner wall of the well body 1. A connecting groove 23 is opened on the side of the wedge blocks 21 away from the well body 1. An internal support plate 22 is arranged inside the connecting groove 23. The outer wall of the wedge blocks 21 and the inner wall of the well body 1 abut against each other. The wedge blocks 21 are symmetrically distributed on both sides of the internal support plate 22. The internal support plate 22 and the wedge blocks 21 are engaged and connected by the connecting grooves 23. The top view cross section of the internal support plate 22 is circular.

[0030] The wedge block 21 is pressed against the inner wall of the well body 1 by mechanical pressure. The inner ring-shaped support plate 22 is embedded in the connecting groove 23 to form a multi-point uniform support. During welding, the inner support structure 2 disperses thermal stress and prevents local deformation.

[0031] Reference Figures 1-5 A positioning structure 4 is provided on the outer side of the well body 1. The positioning structure 4 includes an upper connecting rod 41, a mounting plate 42, a connecting plate 43, a middle connecting rod 44, and a lower connecting rod 45. The middle connecting rod 44 is evenly distributed at the middle position on the outer side of the well body 1. The two ends of the middle connecting rod 44 are fixed with the connecting plate 43. The side of the connecting plate 43 away from the middle connecting rod 44 is bolted with the mounting plate 42. The top of the mounting plate 42 above the middle connecting rod 44 is evenly fixed with the upper connecting rod 41. The bottom of the mounting plate 42 below the middle connecting rod 44 is evenly fixed with the lower connecting rod 45. The upper connecting rod 41, the middle connecting rod 44, and the lower connecting rod 45 are all evenly distributed on the outer side of the well body 1.

[0032] The connecting plate 31 is connected to the external structure through the upper connecting rod 41. During welding, the limiting plate 32 at the top of the connecting plate 31 can hold the upper edge of the well body 1, and the fixing bolt 33 at the bottom of the connecting plate 31 is inserted into the limiting plate 32 to achieve connection stability between the connecting plate 31 and the limiting plate 32, forming an axial constraint on the well body 1. In addition, the fixing bolt 33 can conduct heat, which facilitates faster heat dissipation.

[0033] Reference Figures 1-3 and Figure 5 The limiting structure 3 includes a connecting plate 31, a limiting plate 32, and fixing bolts 33. The connecting plate 31 is fixed to the top of the upper connecting rod 41. The limiting plate 32 is provided on one side of the top of the connecting plate 31. The fixing bolts 33 are evenly distributed through one side of the bottom of the connecting plate 31. The central axis of the connecting plate 31 is collinear with the central axis of the well body 1. The inner wall of the bottom side of the limiting plate 32 is in contact with the outer wall of the top of the well body 1. The fixing bolts 33 are evenly distributed inside the connecting plate 31. The top of each fixing bolt 33 extends to the outside of the limiting plate 32.

[0034] The middle connecting rod 44 is fixed to the outside of the well body 1 as the main frame. The connecting plate 43 and the mounting plate 42 form an adjustable clamping arm. After being tightened by bolts, the upper connecting rod 41 and the lower connecting rod 45 apply pressure from above and below respectively, and cooperate with the inner support structure 2 to achieve high-precision centering.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A manufacturing and welding fixture for a nuclear waste storage well, comprising a well body (1); Its features are: The inner wall of the well body (1) is uniformly provided with an inner support structure (2). The inner support structure (2) includes a wedge block (21), an inner support plate (22) and a connecting groove (23). The wedge block (21) is uniformly provided on the inner wall of the well body (1). A connecting groove (23) is provided on the side of the wedge block (21) away from the well body (1). An inner support plate (22) is provided inside the connecting groove (23). A positioning structure (4) is provided on the outer side of the well body (1); The top of the positioning structure (4) is fixed with a limiting structure (3).

2. A nuclear waste storage shaft manufacturing and welding rig according to claim 1, characterised in that: The outer wall of the wedge block (21) and the inner wall of the well body (1) abut against each other, and the wedge block (21) is symmetrically distributed on both sides of the inner support plate (22).

3. A nuclear waste storage shaft manufacturing and welding rig according to claim 1, wherein: The inner support plate (22) and the wedge block (21) are engaged and connected by a connecting groove (23).

4. The nuclear waste storage shaft manufacturing and welding rig of claim 1, wherein: The top view of the inner support plate (22) is circular.

5. The nuclear waste storage shaft manufacturing and welding rig of claim 1, wherein: The limiting structure (3) includes a connecting plate (31), a limiting plate (32), and a fixing bolt (33). The connecting plate (31) is fixed to the top of the upper connecting rod (41). A limiting plate (32) is provided on one side of the top of the connecting plate (31), and a fixing bolt (33) is uniformly passed through one side of the bottom of the connecting plate (31).

6. A nuclear waste storage wellbore manufacturing and welding rig kit according to claim 5, wherein: The central axis of the connecting plate (31) is collinear with the central axis of the well body (1), and the inner wall of the bottom side of the limiting plate (32) and the outer wall of the top of the well body (1) are in contact with each other.

7. A nuclear waste storage wellbore manufacturing and welding rig kit according to claim 5, wherein: The fixing bolts (33) are evenly distributed inside the connecting plate (31), and the top of each fixing bolt (33) extends to the outside of the limiting plate (32).

8. A nuclear waste storage wellbore manufacturing and welding rig kit according to claim 1, wherein: The positioning structure (4) includes an upper connecting rod (41), a mounting plate (42), a connecting plate (43), a middle connecting rod (44), and a lower connecting rod (45). The middle connecting rod (44) is evenly arranged at the middle position on the outside of the well body (1). Both ends of the middle connecting rod (44) are fixed with connecting plates (43). The side of the connecting plate (43) away from the middle connecting rod (44) is bolted with a mounting plate (42). The top of the mounting plate (42) above the middle connecting rod (44) is evenly fixed with an upper connecting rod (41). The bottom of the mounting plate (42) below the middle connecting rod (44) is evenly fixed with a lower connecting rod (45).

9. A nuclear waste storage wellbore manufacturing and welding rig kit according to claim 8, wherein: The upper connecting rod (41), middle connecting rod (44) and lower connecting rod (45) are all distributed at equal intervals on the outside of the well body (1).

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