A welding fixture for manufacturing shielding plugs for nuclear waste storage wells

Abstract

This utility model relates to the field of nuclear waste storage well technology, and provides a manufacturing and welding fixture for a nuclear waste storage well shielding plug. The fixture includes a base, a first well opening at the top of the base, a second well opening above the first well opening, and a third well opening above the second well opening. A positioning structure is fixed to the top of the base inside the first well opening. This utility model incorporates an adjustment structure, allowing a first pressure ring and a second pressure ring to move outwards from the stud. Under the action of a first fixing nut and a second fixing nut, the first and second pressure rings can be fixed or disassembled with the stud. The action of a first flat washer and a second flat washer prevents loosening, thus enabling the assembly of storage wells of different lengths. This device facilitates height adjustment, thereby improving the applicability of the nuclear waste storage well shielding plug manufacturing and welding fixture in use.

Description

Technical Field

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

[0002] Nuclear waste storage wells are underground facilities used to store radioactive waste generated from nuclear power plants, nuclear fuel cycles, and scientific research activities. Through radiation protection, they reduce radiation leakage from nuclear waste and ensure the safety of the surrounding environment and personnel. Therefore, a kind of nuclear waste storage well shielding plug manufacturing and welding tooling is used.

[0003] To address this, patent CN215669688U discloses a nuclear waste storage well cover and a storage well containing the cover. The nuclear waste storage well cover includes a cover body and a pipe sampling mechanism. The pipe sampling mechanism is disposed inside the cover body and includes a vertical pipe, a first bend, and a second bend. The top end of the vertical pipe is connected to the top of the cover body. The first bend is L-shaped, with its horizontal end connected to the upper end of the vertical pipe and its vertical end connected to the top of the cover body. The second bend is L-shaped, with its horizontal end connected to the lower end of the vertical pipe and its vertical end connected to the bottom of the cover body. During sampling, samples can be taken directly through the pipe sampling mechanism without removing the cover, making this sampling method convenient and quick.

[0004] Although the nuclear waste storage well cover and the storage well containing the cover can be directly sampled through the pipeline sampling mechanism without removing the cover, making this sampling method convenient and quick, its applicability is low because it is inconvenient to adjust the height and to assemble and weld storage wells of different lengths. Utility Model Content

[0005] The purpose of this invention is to provide a welding fixture for manufacturing shielding plugs for nuclear waste storage wells, in order to solve the problem that the existing welding fixtures for manufacturing shielding plugs for nuclear waste storage wells are inconvenient to adjust in height.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a welding fixture for manufacturing a shielding plug for a nuclear waste storage well, including a base;

[0007] The base has a first well opening at its top, a second well opening above the first well opening, a third well opening above the second well opening, and a positioning structure fixed inside the top of the base.

[0008] A connecting structure is installed at the top of the positioning structure;

[0009] An adjustment structure is fixed at the edge of the top of the base. The adjustment structure includes studs that are evenly fixed at the top of the base. A second pressure ring is fitted in the middle of the stud. A first pressure ring is fitted on the outer side of the top of the stud. A second flat washer is fitted on the outer side of the studs at both ends of the first pressure ring.

[0010] When using this device, the adjustable structure enables easy height adjustment, thereby improving the applicability of the nuclear waste storage well shielding plug manufacturing and welding fixture during use; the positioning structure facilitates assembly and welding, thereby improving the stability of the nuclear waste storage well shielding plug manufacturing and welding fixture during use; and the connecting structure facilitates clamping, thereby improving the convenience of the nuclear waste storage well shielding plug manufacturing and welding fixture during use.

[0011] Preferably, a second fixing nut is fitted onto the outer side of one end of the second flat washer stud, and a first flat washer is fitted onto the outer side of both ends of the second pressure ring stud, with a first fixing nut fitted onto the outer side of one end of the first flat washer stud. The first and second pressure rings can move outwards from the stud, and under the action of the first and second fixing nuts, the first and second pressure rings can be fixed or disassembled from the stud.

[0012] Preferably, the second pressure ring and the stud are fixedly connected by a first fixing nut, and the first pressure ring and the stud are fixedly connected by a second fixing nut. The first and second flat washers prevent loosening, thus enabling the assembly of storage wells of different lengths.

[0013] Preferably, the positioning structure includes a mandrel, reinforcing ribs, a first shielding plug, a second shielding plug, a first positioning ring, fixing bolts, a second positioning ring, and a rubber ring. The mandrel is fixed to the top of the base. A second shielding plug is disposed on the outer side of the mandrel, and a first shielding plug is disposed on the outer side of the mandrel above the second shielding plug. A rubber ring is disposed on the outer side of the top of the mandrel. A first positioning ring is disposed on one side of the rubber ring, and a second positioning ring is disposed on the other side of the rubber ring. Fixing bolts penetrate both sides of the inner surfaces of the first and second positioning rings. By using the mandrel as the central axis reference of the entire tooling, the bending and torsional stiffness can be improved under the action of the reinforcing ribs, and electromagnetic interference and radio frequency interference can be reduced under the action of the first and second shielding plugs.

[0014] Preferably, the top end of the mandrel extends to the outside of the third wellhead. The outer side of the first shielding plug is fixedly connected to the inner side of the first pressure ring. The top end of the first shielding plug abuts against the bottom end of the third wellhead. The bottom end of the first shielding plug abuts against the top end of the second wellhead. The outer side of the second shielding plug is fixedly connected to the inner side of the second pressure ring. The top end of the second shielding plug abuts against the bottom end of the second wellhead. The bottom end of the second shielding plug abuts against the top end of the first wellhead. Under the action of the fixing bolts, the first positioning ring and the second positioning ring are fixed or disassembled. Under the action of the rubber ring, the friction between the first positioning ring and the second positioning ring and the mandrel is increased, thereby fixing the first positioning ring and the second positioning ring to the outside of the mandrel.

[0015] Preferably, the connecting structure includes a pressure plate, a first connecting bolt, a second connecting bolt, and a connecting plate. The pressure plate is disposed at the top of the mandrel, and the connecting plate is fixed to the top of the mandrel. The second connecting bolt passes through the middle of the pressure plate, and the first connecting bolts are evenly distributed through both sides of the inside of the pressure plate. Under the action of the first connecting bolt, the pressure plate is fixed or disassembled with the first positioning ring and the second positioning ring.

[0016] Preferably, the pressure plate and the connecting plate are fixedly connected by a second connecting bolt, and the pressure plate is fixedly connected to the first positioning ring and the second positioning ring by the first connecting bolt. Under the action of the second connecting bolt, the pressure plate and the connecting plate are fixed or disassembled to each other, thereby fixing the pressure plate to the mandrel and eliminating assembly gaps.

[0017] The present invention provides a manufacturing and welding fixture for a shielding plug of a nuclear waste storage well, the advantages of which are:

[0018] By incorporating an adjustment structure, the first and second pressure rings can move outwards from the stud. Under the action of the first and second fixing nuts, the first and second pressure rings can be fixed or disassembled with the stud. Under the action of the first and second flat washers, loosening can be prevented. This allows for the assembly of storage wells of different lengths, enabling the device to be easily adjustable in height. This improves the applicability of the nuclear waste storage well shielding plug manufacturing and welding fixture during use.

[0019] By incorporating a positioning structure and using the mandrel as the central axis reference for the entire tooling, the bending and torsional stiffness can be improved with the help of reinforcing ribs. The electromagnetic interference and radio frequency interference are reduced by the first and second shielding plugs. The first and second positioning rings can be fixed or disassembled by the fixing bolts. The friction between the first and second positioning rings and the mandrel is increased by the rubber rings, thereby fixing the first and second positioning rings to the outside of the mandrel. This makes the device easy to assemble and weld, thus improving the stability of the nuclear waste storage well shielding plug manufacturing and welding tooling during use.

[0020] By setting up a connecting structure, the pressure plate is fixed or disassembled with the first positioning ring and the second positioning ring under the action of the first connecting bolt, and the pressure plate is fixed or disassembled with the connecting plate under the action of the second connecting bolt, thereby fixing the pressure plate with the mandrel, thus eliminating the assembly gap and realizing the function of easy clamping of the device, thereby improving the convenience of use of the nuclear waste storage well shielding plug manufacturing and welding fixture. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural schematic diagram of the main cross-section of this utility model;

[0023] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

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

[0025] Figure 5 This is a top-view cross-sectional three-dimensional structural diagram of the present invention.

[0026] The reference numerals in the diagram are as follows: 1. Base; 2. First wellhead; 3. Adjustment structure; 301. Stud; 302. First pressure ring; 303. Second pressure ring; 304. First fixing nut; 305. First flat washer; 306. Second fixing nut; 307. Second flat washer; 4. Second wellhead; 5. Third wellhead; 6. Positioning structure; 601. Mandrel; 602. Reinforcing rib; 603. First shielding plug; 604. Second shielding plug; 605. First positioning ring; 606. Fixing bolt; 607. Second positioning ring; 608. Rubber ring; 7. Connecting structure; 701. Pressure plate; 702. First connecting bolt; 703. Second connecting bolt; 704. Connecting plate. 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 This utility model provides a manufacturing and welding fixture for a nuclear waste storage well shielding plug, including a base 1. A first well opening 2 is provided at the top of the base 1. A second well opening 4 is provided above the first well opening 2. A third well opening 5 is provided above the second well opening 4. A positioning structure 6 is fixed to the top of the base 1 inside the first well opening 2. The positioning structure 6 includes a mandrel 601, a reinforcing rib 602, a first shielding plug 603, a second shielding plug 604, a first positioning ring 605, a fixing bolt 606, a second positioning ring 607, and a rubber ring 608. The mandrel 601 is fixed to the top of the base 1. The second shielding plug 604 is provided on the outer side of the mandrel 601. The first shielding plug 603 is provided on the outer side of the mandrel 601 above the second shielding plug 604. A third well opening 5 is provided on the outer side of the top of the mandrel 601. A rubber ring 608 has a first positioning ring 605 on one side and a second positioning ring 607 on the other side. Fixing bolts 606 pass through both sides of the first positioning ring 605 and the second positioning ring 607. The top of the spindle 601 extends to the outside of the third wellhead 5. The outer side of the first shielding plug 603 is fixedly connected to the inner side of the first pressure ring 302. The top of the first shielding plug 603 abuts against the bottom of the third wellhead 5. The bottom of the first shielding plug 603 abuts against the top of the second wellhead 4. The outer side of the second shielding plug 604 is fixedly connected to the inner side of the second pressure ring 303. The top of the second shielding plug 604 abuts against the bottom of the second wellhead 4. The bottom of the second shielding plug 604 abuts against the top of the first wellhead 2.

[0029] Reference Figure 2 and Figure 5 As shown, the mandrel 601 serves as the central axis reference for the entire tooling. Under the action of the reinforcing rib 602, the bending and torsional stiffness can be improved. Under the action of the first shielding plug 603 and the second shielding plug 604, electromagnetic interference and radio frequency interference can be reduced. Under the action of the fixing bolt 606, the first positioning ring 605 and the second positioning ring 607 can be fixed or disassembled. Under the action of the rubber ring 608, the friction between the first positioning ring 605 and the second positioning ring 607 and the mandrel 601 is increased, thereby fixing the first positioning ring 605 and the second positioning ring 607 to the outside of the mandrel 601.

[0030] A connecting structure 7 is installed at the top of the positioning structure 6. The connecting structure 7 includes a pressure plate 701, a first connecting bolt 702, a second connecting bolt 703, and a connecting plate 704. The pressure plate 701 is located at the top of the spindle 601. The connecting plate 704 is fixed to the top of the spindle 601. The second connecting bolt 703 passes through the middle of the pressure plate 701. The first connecting bolt 702 passes through both sides of the inside of the pressure plate 701. The pressure plate 701 and the connecting plate 704 are fixedly connected by the second connecting bolt 703. The pressure plate 701 is fixedly connected to the first positioning ring 605 and the second positioning ring 607 by the first connecting bolt 702.

[0031] Reference Figure 2 and Figure 4 As shown, under the action of the first connecting bolt 702, the pressure plate 701 is fixed or disassembled with the first positioning ring 605 and the second positioning ring 607. Under the action of the second connecting bolt 703, the pressure plate 701 is fixed or disassembled with the connecting plate 704, thereby fixing the pressure plate 701 with the spindle 601, thus eliminating the assembly gap.

[0032] An adjustment structure 3 is fixed at the edge of the top of the base 1. The adjustment structure 3 includes studs 301 that are evenly fixed to the top of the base 1. A second pressure ring 303 is fitted in the middle of the stud 301. A first pressure ring 302 is fitted on the outer side of the top of the stud 301. A second flat washer 307 is fitted on the outer side of the studs 301 at both ends of the first pressure ring 302. A second fixing nut 306 is fitted on the outer side of the studs 301 at one end of the second flat washer 307. A first flat washer 305 is fitted on the outer side of the studs 301 at both ends of the second pressure ring 303. A first fixing nut 304 is fitted on the outer side of the studs 301 at one end of the first flat washer 305. The second pressure ring 303 and the studs 301 are fixedly connected by the first fixing nut 304. The first pressure ring 302 and the studs 301 are fixedly connected by the second fixing nut 306.

[0033] Reference Figures 3-5 As shown, the first pressure ring 302 and the second pressure ring 303 are moved to move outside the stud 301. Under the action of the first fixing nut 304, the second pressure ring 303 and the stud 301 are fixed or disassembled. Under the action of the second fixing nut 306, the first pressure ring 302 and the stud 301 are either fixed or disassembled. Under the action of the first flat washer 305 and the second flat washer 307, loosening can be prevented, thereby enabling the assembly of storage wells of different lengths.

[0034] 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 welding fixture for manufacturing a shielding plug for a nuclear waste storage well, comprising a base (1); Its features are: The base (1) has a first well opening (2) at its top, a second well opening (4) above the first well opening (2), a third well opening (5) above the second well opening (4), and a positioning structure (6) fixed to the top of the base (1) inside the first well opening (2). A connecting structure (7) is installed at the top of the positioning structure (6); An adjustment structure (3) is fixed at the edge of the top of the base (1). The adjustment structure (3) includes studs (301) that are uniformly fixed at the top of the base (1). A second pressure ring (303) is sleeved in the middle of the stud (301). A first pressure ring (302) is sleeved on the outer side of the top of the stud (301). A second flat washer (307) is sleeved on the outer side of the studs (301) at both ends of the first pressure ring (302).

2. A nuclear waste storage well closure plug fabrication assembly as defined in claim 1, wherein: The second flat washer (307) has a second fixing nut (306) fitted on the outside of the stud (301) at one end. The second pressure ring (303) has a first flat washer (305) fitted on the outside of the stud (301) at both ends. The first flat washer (305) has a first fixing nut (304) fitted on the outside of the stud (301) at one end.

3. The welding fixture for manufacturing a shielding plug for a nuclear waste storage well according to claim 2, characterized in that: The second pressure ring (303) and the stud (301) are fixedly connected by the first fixing nut (304), and the first pressure ring (302) and the stud (301) are fixedly connected by the second fixing nut (306).

4. The nuclear waste storage well closure plug fabrication assembly of claim 1, wherein: The positioning structure (6) includes a mandrel (601), a reinforcing rib (602), a first shielding plug (603), a second shielding plug (604), a first positioning ring (605), a fixing bolt (606), a second positioning ring (607), and a rubber ring (608). The mandrel (601) is fixed to the top of the base (1). A second shielding plug (604) is provided on the outside of the mandrel (601). A first shielding plug (603) is provided on the outside of the mandrel (601) above the second shielding plug (604). A rubber ring (608) is provided on the outside of the top of the mandrel (601). A first positioning ring (605) is provided on one side of the rubber ring (608), and a second positioning ring (607) is provided on the other side of the rubber ring (608). Fixing bolts (606) pass through both sides of the inside of the first positioning ring (605) and the second positioning ring (607).

5. A nuclear waste storage well closure plug fabrication assembly as defined in claim 4, wherein: The top end of the mandrel (601) extends to the outside of the third wellhead (5). The outer side of the first shielding plug (603) is fixedly connected to the inner side of the first pressure ring (302). The top end of the first shielding plug (603) abuts against the bottom end of the third wellhead (5). The bottom end of the first shielding plug (603) abuts against the top end of the second wellhead (4). The outer side of the second shielding plug (604) is fixedly connected to the inner side of the second pressure ring (303). The top end of the second shielding plug (604) abuts against the bottom end of the second wellhead (4). The bottom end of the second shielding plug (604) abuts against the top end of the first wellhead (2).

6. A nuclear waste storage well closure plug fabrication assembly as defined in claim 4, wherein: The connecting structure (7) includes a pressure plate (701), a first connecting bolt (702), a second connecting bolt (703), and a connecting plate (704). The pressure plate (701) is disposed at the top of the mandrel (601), and the connecting plate (704) is fixed at the top of the mandrel (601). The second connecting bolt (703) passes through the middle of the pressure plate (701), and the first connecting bolt (702) passes through both sides of the inside of the pressure plate (701).

7. A nuclear waste storage well closure plug fabrication assembly as defined in claim 6, wherein: The pressure plate (701) and the connecting plate (704) are fixedly connected by the second connecting bolt (703), and the pressure plate (701) is fixedly connected to the first positioning ring (605) and the second positioning ring (607) by the first connecting bolt (702).

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