Nuclear-grade large-diameter compression fitting

Abstract

This utility model relates to a nuclear-grade large-diameter compression fitting, comprising a limiting ring, the opening of which is smaller than that of a fixing ring. A second limiting block is located inside the fixing ring. A first sealing block and a second sealing block are located on either side of the second limiting block. The fixing ring is connected to an annular ring by bolts. A helical concave ring is provided on the outer surface of the annular ring. A threaded sleeve, welded to the annular ring, is located on the other side of the annular ring. The thickness of the threaded sleeve is less than that of the annular ring. The outer side of the threaded sleeve and the annular ring are integrally formed. Inside the threaded sleeve is a first limiting block. A third sealing block is fitted to the inner ring of the threaded sleeve. A notch is provided on the other side of the threaded sleeve, smaller than the obliquely cut ring at the bottom of the threaded sleeve. A pipe shell is provided on the outer side of the threaded sleeve, fitted to the annular ring and the threaded sleeve. The obliquely cut ring secures the pipe, while the first, second, and third sealing blocks seal the internal pipe to prevent gas or liquid leakage, providing strong sealing performance.

Description

Technical Field

[0001] This utility model belongs to the field of compression fitting technology, specifically relating to nuclear-grade large-diameter compression fittings. Background Technology

[0002] Compression fittings achieve a seal by compressing the ferrule through threaded interlocking, causing the pipe to deform evenly. Compression fittings are widely used in daily life and are a familiar tool accessory. They offer advantages such as simple structure, ease of use, and no welding required, bringing significant convenience to production and daily life. A compression fitting consists of three parts: the fitting body, the ferrule, and the nut. When the ferrule and nut are fitted onto the steel pipe and inserted into the fitting body, tightening the nut causes the outer front end of the ferrule to fit against the conical surface of the fitting body, while the inner edge evenly grips the seamless steel pipe, forming an effective seal.

[0003] Nuclear-grade large-diameter compression fittings are mainly used in nuclear power plants, nuclear research facilities and other occasions that require high-reliability connections. Therefore, the sealing performance and corrosion resistance of nuclear-grade large-diameter compression fittings should be higher than those of traditional compression fittings on the market.

[0004] In summary, existing technologies have poor sealing and corrosion resistance, and cannot meet the connection requirements of nuclear power plants and nuclear research instruments. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Therefore, the purpose of this utility model is to provide a nuclear-grade large-diameter ferrule connector, which can solve the problem that the existing technology has poor sealing and corrosion resistance, and cannot meet the connection requirements of nuclear power plants and nuclear research instruments. This utility model provides a nuclear-grade large-diameter ferrule connector, which includes a limiting ring, the opening of which is smaller than that of a fixing ring. A second limiting block is provided inside the fixing ring, and a first sealing block and a second sealing block are located on both sides of the second limiting block. The fixing ring is connected to an annular ring by bolts. A helical concave ring is provided on the outer surface of the annular ring, and a threaded sleeve welded to it is on the other side of the annular ring. The thickness of the threaded sleeve is smaller than that of the annular ring. The outer side of the threaded sleeve and the annular ring are integral. A first limiting block and a third sealing block are provided inside the threaded sleeve, which are adapted to the inner ring of the threaded sleeve. A notch is provided on the other side of the threaded sleeve, the notch being smaller than the oblique ring at the bottom of the threaded sleeve. A pipe shell is provided on the outer side of the threaded sleeve, and the pipe shell is adapted to the annular ring and the threaded sleeve.

[0007] Optionally, the radius of the pipe shell opening is smaller than that of the threaded sleeve opening, and the threaded sleeve opening and the threaded sleeve opening are consistent.

[0008] Optionally, the fixing ring and the limiting ring are welded together, and the first sealing block is fixed inside the fixing ring. The first sealing block, the second sealing block and the third sealing block are all annular sealing blocks, and the first sealing block and the second sealing block are annular structures with trapezoidal sides.

[0009] Optionally, the first sealing block, the second sealing block, and the third sealing block are made of rubber.

[0010] Optionally, the outer ring of the fixed ring is provided with multiple welded limiting structures, each limiting structure having a matching sealing block. The sealing block is connected to the control lever, and a control block is welded to the top of the control lever. The control lever spirally passes through the pipe connection assembly welded to the outside of the pipe shell.

[0011] Optionally, the limiting structure is a limiting cylinder with a spiral ring and a spring ring inside, and the sealing block has a spiral ring on the outside that is adapted to the inside of the limiting structure.

[0012] Optionally, the pipe shell, the fixing ring, the limiting ring, and the annular ring are all made of titanium alloy.

[0013] Optionally, the limiting structure and the pipe connection assembly are made of titanium alloy, and the pipe connection assembly is a circular ring.

[0014] Optionally, the joystick has a cross-shaped notch at the top.

[0015] In summary, this utility model has at least one of the following beneficial effects: This utility model uses a beveled ring to fix the pipe, and the first sealing block, the second sealing block and the third sealing block are used to seal the internal pipe to prevent gas or liquid leakage, and the sealing performance is strong.

[0016] This utility model uses titanium alloy, which is a radiation-resistant alloy with special properties of corrosion resistance and radiation resistance. The stability of the ferrule joint is enhanced by the limiting structure, sealing block and operating lever between the pipe connection component and the fixing ring, while the internal spring structure can provide buffering. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The figure shows the nuclear-grade large-diameter compression fitting of this utility model; List of reference numerals in the attached diagram: 1. Control block; 2. Control lever; 3. Pipe connection assembly; 4. Sealing block; 5. Limiting structure; 6. Annular ring; 7. Fixing ring; 8. Second limiting block; 9. Limiting ring; 10. First sealing block; 11. Second sealing block; 12. First limiting block; 13. Third sealing block; 14. Threaded sleeve; 15. Threaded sleeve; 16. Pipe shell. Implementation

[0019] The following is in conjunction with the appendix Figure 1 This utility model will be described in further detail below.

[0020] Example 1, refer to Figure 1 In this embodiment, to address the problem that existing technologies have poor sealing and corrosion resistance, failing to meet the connection requirements of nuclear power plants and nuclear research instruments, this utility model discloses a nuclear-grade large-diameter compression fitting, including a limiting ring 9. The opening of the limiting ring 9 is smaller than that of the fixing ring 7. The fixing ring 7 has a second limiting block 8 inside, and a first sealing block 10 and a second sealing block 11 on both sides of the second limiting block 8. The fixing ring 7 is connected to an annular ring 6 by bolts. The outer surface of the annular ring 6 is provided with a spiral concave ring. On the other side of the annular ring 6, there is a threaded sleeve 14 welded to it. The thickness of the threaded sleeve 14 is smaller than that of the annular ring 6. The outer side of the threaded sleeve 14 and the annular ring 6 are the same as a whole. Inside the threaded sleeve 14, there is a first limiting block 12. A third sealing block 13 is adapted to the inner ring of the threaded sleeve 14. A notch is provided on the other side of the threaded sleeve 14. The notch is smaller than the oblique ring at the bottom of the threaded sleeve 15. A pipe shell 16 is provided on the outer side of the threaded sleeve 15. The pipe shell 16 is adapted to the annular ring 6 and the threaded sleeve 14. The radius of the opening of the pipe shell 16 is smaller than that of the opening of the threaded sleeve 15, and the opening of the threaded sleeve 15 is consistent with that of the threaded sleeve 14.

[0021] The second limiting block 8 seals the first sealing block 10 and the second sealing block 11 to prevent gas or liquid from leaking through the lower side. The third sealing block 13 and the first limiting block 12 are set to prevent gas or liquid from leaking through the upper side. Because the pipe shell 16 and the threaded sleeve 14 and the spiral ring on the outside of the annular ring 6 are compatible, when they are fixed, the oblique ring at the bottom of the threaded sleeve 15 will move downward, and the notch of the threaded sleeve 14 will contact and squeeze the pipe to fix it.

[0022] The fixing ring 7 and the limiting ring 9 are welded together. The first sealing block 10 is fixed inside the fixing ring 7. The first sealing block 10, the second sealing block 11, and the third sealing block 13 are all annular sealing blocks. The first sealing block 10 and the second sealing block 11 are annular structures with trapezoidal sides. The first sealing block 10, the second sealing block 11, and the third sealing block 13 are made of rubber. The outer ring of the fixing ring 7 is provided with multiple welded limiting structures 5. Each limiting structure 5 has a matching sealing block 4. The sealing block 4 is connected to the operating lever 2. The top of the operating lever 2 is welded with an operating block 1. The operating lever 2 spirally passes through the pipe connection assembly 3 welded to the outside of the pipe shell 16. The limiting structure 5 is a limiting cylinder with a spiral ring and a spring ring inside. The sealing block 4 has a spiral ring on the outside that matches the inside of the limiting structure 5. The pipe shell 16, the fixing ring 7, the limiting ring 9, and the annular ring 6 are all made of titanium alloy. The limiting structure 5 and the pipe connection assembly 3 are made of titanium alloy, and the pipe connection assembly 3 is an annular ring. The top of the control lever 2 has a cross-shaped notch.

[0023] The annular sealing block ensures a more uniform seal, and multiple welding points guarantee the sealing performance of this invention. The pipe connection assembly 3 and the fixing ring 7 are connected by a limiting structure 5, a sealing block 4, and a control lever 2, which enhance the stability of the ferrule joint while the internal spring structure provides cushioning. The control lever 2 has a cross-shaped notch at the top for better securing of the surrounding area, ensuring the stability of the device. The spring design provides cushioning, preventing the shaking caused by the movement of large-diameter pipes from affecting the sealing effect. The titanium alloy outer shell provides corrosion resistance, radiation resistance, and high-temperature resistance, protecting the device from the effects of high temperatures and extending its service life.

[0024] Specific implementation principle: When using this utility model, firstly, the limiting ring 9 and the fixing ring 7 are fitted onto the pipe, and the second sealing block 11 is fitted onto the pipe. The annular ring 6 is fixed by a spiral connection. The annular ring 6 and the threaded sleeve 14 are a whole. The pipe shell 16 is fitted onto another pipe, and then the threaded sleeve 15 is fitted on. The third sealing block 13 is fitted onto the top of the pipe and inserted into the threaded sleeve 14. The pipe is fixed by the spiral connection of the pipe shell 16, the threaded sleeve 14, and the annular ring 6. When the fixation is secure, the operating block 1 is rotated. The operating block 1 drives the operating lever 2, and the operating lever 2 drives the sealing block 4 to move downward, so that the sealing block 4 contacts the limiting structure 5. The secondary fixation is reinforced by rotating with a cross screwdriver to ensure the stability of the secondary fixation.

[0025] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A nuclear-grade large-diameter compression fitting, characterized in that, The device includes a limiting ring (9), the opening of which is smaller than that of a fixing ring (7). A second limiting block (8) is provided inside the fixing ring (7). A first sealing block (10) and a second sealing block (11) are located on both sides of the second limiting block (8). The fixing ring (7) is connected to an annular ring (6) by bolts. A spiral concave ring is provided on the outer surface of the annular ring (6). A threaded sleeve (14) is welded to the other side of the annular ring (6). The thickness of the threaded sleeve (14) is smaller than that of the annular ring (7). The thickness of the ring (6) is the same as that of the outer side of the threaded sleeve (14) and the annular ring (6) as a whole. The threaded sleeve (14) has a first limiting block (12) inside and a third sealing block (13) that is adapted to the inner ring of the threaded sleeve (14). A notch is provided on the other side of the threaded sleeve (14). The notch is smaller than the oblique cut ring at the bottom of the threaded sleeve (15). A pipe shell (16) is provided on the outer side of the threaded sleeve (15). The pipe shell (16) is adapted to the annular ring (6) and the threaded sleeve (14).

2. The nuclear-grade large-diameter compression fitting according to claim 1, characterized in that, The opening radius of the pipe shell (16) is smaller than that of the threaded sleeve (15), and the opening of the threaded sleeve (15) is consistent with that of the threaded sleeve (14).

3. The nuclear-grade large-diameter compression fitting according to claim 1, characterized in that, The fixing ring (7) and the limiting ring (9) are welded together. The first sealing block (10) is fixed inside the fixing ring (7). The first sealing block (10), the second sealing block (11) and the third sealing block (13) are all annular sealing blocks. The first sealing block (10) and the second sealing block (11) are annular structures with trapezoidal sides.

4. The nuclear-grade large-diameter compression fitting according to claim 3, characterized in that, The first sealing block (10), the second sealing block (11) and the third sealing block (13) are made of rubber.

5. The nuclear-grade large-diameter compression fitting according to claim 1, characterized in that, The outer ring of the fixed ring (7) is provided with multiple welded limiting structures (5), the limiting structure (5) has a matching sealing block (4), the sealing block (4) is connected to the control lever (2), the top of the control lever (2) is welded with a control block (1), and the control lever (2) spirally passes through the pipe connection assembly (3) welded to the outside of the pipe shell (16).

6. The nuclear-grade large-diameter compression fitting according to claim 5, characterized in that, The limiting structure (5) is a limiting cylinder with a spiral ring and a spring ring inside. The sealing block (4) has a spiral ring on the outside that matches the inside of the limiting structure (5).

7. The nuclear-grade large-diameter compression fitting according to claim 1, characterized in that, The pipe shell (16), the fixing ring (7), the limiting ring (9) and the annular ring (6) are all made of titanium alloy.

8. The nuclear-grade large-diameter compression fitting according to claim 5, characterized in that, The limiting structure (5) and the pipe connection assembly (3) are made of titanium alloy, and the pipe connection assembly (3) is a circular ring.

9. The nuclear-grade large-diameter compression fitting according to claim 5, characterized in that, The joystick (2) has a cross-shaped cut at the top.

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