High-temperature-resistant anti-leakage titanium alloy pipe

Abstract

The utility model relates to titanium alloy pipe technical field especially is a kind of high-temperature-resistant anti-leakage titanium alloy pipe, including pipe body, the one end of pipe body is equipped with first flange plate, first flange plate and pipe body between are equipped with first sealing assembly, the side of first flange plate away from pipe body is equipped with alloy bellows, the both ends of alloy bellows are fixedly connected with second flange plate in symmetry, second flange plate between first flange plate is equipped with second sealing assembly, first sealing assembly includes flange neck, flange neck is fixedly connected with the side of first flange plate close to pipe body, the outside of flange neck is connected with sealing ring by interference fit, the outer diameter of sealing ring and the inner diameter of pipe body are mutually matched arrangement, in the utility model, it has good high-temperature-resistant capacity, and when conveying high-temperature medium, the thermal expansion stress in the inside of pipe body can be released, prevent the local sealing pressure shortage of the junction of pipe body, so that the junction of pipe body is not easy to appear leakage.

Description

Technical Field

[0001] This utility model relates to the field of titanium alloy pipe technology, specifically a high-temperature resistant and leak-proof titanium alloy pipe. Background Technology

[0002] Titanium alloy pipe is a type of pipe made of titanium alloy. It combines the high strength, low density, and excellent corrosion resistance of titanium metal. Titanium alloy pipe is usually made by mixing titanium with other metallic elements (such as aluminum, vanadium, molybdenum, etc.) to improve its mechanical properties and heat resistance. This type of pipe is widely used in aerospace, chemical, marine engineering, medical devices and sports equipment. The lightweight nature of titanium alloy pipe makes it very popular in applications where weight reduction is required.

[0003] Its excellent corrosion resistance allows it to withstand extreme environments, such as high-salinity seawater or strong acid and alkali chemical environments. In addition, titanium alloy tubes have good biocompatibility, so they are also used to manufacture medical devices such as artificial joints and pacemakers. Although the manufacturing cost of titanium alloy tubes is relatively high, their performance advantages in specific applications make them an important engineering material.

[0004] When titanium alloy tubes are used in the aerospace field, the internal operating temperature of aero engines is extremely high. Even after passing through the cooling system, the fuel, lubricating oil, and other media inside the engine still need to withstand high temperatures when transported through the titanium alloy tubes. If the high-temperature resistance of the titanium alloy tubes is insufficient, the tube body is easily damaged, affecting the operating status of the aero engine. In addition, after the titanium alloy tubes are connected to each other through flanges, the thermal expansion stress inside the tube body is large when transporting high-temperature media, which may cause insufficient local sealing pressure at the joints of the tube bodies, thus easily leading to leakage at the joints. Therefore, a high-temperature resistant and leak-proof titanium alloy tube is proposed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature resistant and leak-proof titanium alloy pipe to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-temperature resistant and leak-proof titanium alloy pipe includes a pipe body, a first flange at one end of the pipe body, a first sealing assembly between the first flange and the pipe body, an alloy corrugated pipe on the side of the first flange away from the pipe body, and second flanges symmetrically and fixedly connected to both ends of the alloy corrugated pipe. A second sealing assembly is provided between the first flange and the second flange, the first sealing assembly including a flange neck, the flange neck being fixedly connected to the side of the first flange near the pipe body, and a sealing ring being interference-fitted to the outer side of the flange neck. The outer diameter of the sealing ring is matched with the inner diameter of the pipe body. The first flange is fixedly welded to the end of the pipe body, the flange neck is located inside the pipe body, and the outer surface of the sealing ring is tightly fitted to the inner surface of the pipe body.

[0008] As a further optimization of this utility model, the tube body is a composite structure, which includes an inner tube layer, and a reinforcing strip that is spirally wound is fixedly connected to the outer surface of the inner tube layer.

[0009] As a further optimization of this utility model, an outer tube layer is fixedly connected to the outer side of the inner tube layer, and the inner wall of the outer tube layer is provided with a spiral groove that cooperates with the reinforcing strip.

[0010] As a further optimization of this utility model, the second sealing assembly includes a sealing gasket disposed between the first flange and the second flange, wherein the sealing gasket has a dumbbell-shaped cross-section with circular protrusions at both ends and a flat middle section.

[0011] As a further optimization of this utility model, a first gasket groove is provided on the side wall of the first flange near the second flange, and a second gasket groove is provided on the side wall of the second flange near the first flange.

[0012] As a further optimization of this utility model, the two protrusions of the sealing gasket are respectively inserted into the first gasket groove and the second gasket groove, and the two protrusions of the sealing gasket are interference-fitted with the first gasket groove and the second gasket groove.

[0013] As a further optimization of this utility model, the first flange and the second flange are provided with connecting bolts, and the first flange and the second flange are connected by the connecting bolts through thread.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the pipe body can be used for transporting media, and it has excellent high-temperature resistance, making it less prone to damage from high temperatures when transporting high-temperature media. The first sealing component provides a good seal between the pipe end and the first flange, preventing leakage from the connection between the pipe end and the first flange. The alloy bellows can release thermal expansion stress within the pipe body through its own expansion and contraction, preventing insufficient local sealing pressure at the pipe connection and thus reducing the likelihood of leakage. The first and second flanges can be connected by bolts, connecting and communicating between the pipe body and the alloy bellows to ensure normal media transport. The second sealing component provides a good seal between the first and second flanges, preventing leakage from the connection between the first and second flanges. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the tube body of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the first sealing component of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the alloy bellows of this utility model;

[0021] Figure 6 This is a cross-sectional view of the alloy bellows section of this utility model;

[0022] Figure 7 This is a cross-sectional view of the second sealing component of this utility model.

[0023] In the diagram: 1. Pipe body; 101. Inner pipe layer; 102. Reinforcing strip; 103. Outer pipe layer; 104. Spiral groove; 2. First flange; 21. First sealing assembly; 211. Flange neck; 212. Sealing ring; 3. Alloy bellows; 4. Second flange; 5. Second sealing assembly; 501. Sealing gasket; 502. First gasket groove; 503. Second gasket groove; 6. Connecting bolts. Detailed Implementation

[0024] 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.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Please see Figures 1-7 This utility model provides a technical solution:

[0027] A high-temperature resistant and leak-proof titanium alloy pipe includes a pipe body 1, a first flange 2 at one end of the pipe body 1, a first sealing assembly 21 between the first flange 2 and the pipe body 1, an alloy corrugated pipe 3 on the side of the first flange 2 away from the pipe body 1, a second flange 4 symmetrically and fixedly connected to both ends of the alloy corrugated pipe 3, and a second sealing assembly 5 between the first flange 2 and the second flange 4. The first sealing assembly 21 includes a flange neck 211, which is fixedly connected to the side of the first flange 2 near the pipe body 1. A sealing ring 212 is interference-fitted to the outer side of the flange neck 211. The outer diameter of the sealing ring 212 is matched with the inner diameter of the pipe body 1. The first flange 2 is fixedly welded to the end of the pipe body 1, the flange neck 211 is located inside the pipe body 1, and the outer surface of the sealing ring 212 is tightly fitted to the inner surface of the pipe body 1.

[0028] As a further implementation of this solution, the pipe body 1 is a composite structure, which includes an inner pipe layer 101. A reinforcing strip 102, which is spirally wound, is fixedly connected to the outer surface of the inner pipe layer 101. An outer pipe layer 103 is fixedly connected to the outer side of the inner pipe layer 101. A spiral groove 104 that cooperates with the reinforcing strip 102 is opened on the inner wall of the outer pipe layer 103. The pipe body 1 can be used for the transportation of media, and its own high temperature resistance is excellent. It is not easily damaged by high temperature when transporting high temperature media.

[0029] As a further implementation of this solution, the second sealing assembly 5 includes a sealing gasket 501 disposed between the first flange 2 and the second flange 4. The sealing gasket 501 has a dumbbell-shaped cross-section with rounded protrusions at both ends and a flat middle section. A first gasket groove 502 is formed on the side wall of the first flange 2 near the second flange 4, and a second gasket groove 503 is formed on the side wall of the second flange 4 near the first flange 2. The two protrusions of the sealing gasket 501 are respectively inserted into the first gasket groove 502 and the second gasket groove 503. The two protrusions of the sealing gasket 501 are interference-fitted with the first gasket groove 502 and the second gasket groove 503. The second sealing assembly 5 can provide good sealing ability between the first flange 2 and the second flange 4, preventing the medium from leaking from the connection between the first flange 2 and the second flange 4.

[0030] As a further implementation of this scheme, a connecting bolt 6 is provided between the first flange 2 and the second flange 4. The first flange 2 and the second flange 4 are connected by the connecting bolt 6 through a threaded connection. The first flange 2 and the second flange 4 can be connected by the connecting bolt 6.

[0031] Working process: The inner tube layer 101 in the pipe body 1 can be used for media transportation. The reinforcing strip 102 is made of ceramic fiber, which has excellent high-temperature resistance and can remain stable in high-temperature environments above 1000℃. It also has low thermal conductivity and good heat insulation effect. At the same time, it also has good chemical stability and can resist the corrosion of various chemical substances. Therefore, when the pipe body 1 is transporting high-temperature media, it is not easily damaged by high temperature. The outer tube layer 103 can be installed in conjunction with the reinforcing strip 102 through the spiral groove 104, which plays a role in protecting the reinforcing strip 102 and further enhancing the overall structural strength of the pipe body 1. When connecting to the first flange 2, first insert the flange neck 211 into the end of the pipe body 1. During insertion, the sealing ring 212 will be squeezed by the inner wall of the pipe body 1, making the sealing ring 212 fit tightly against the inner wall of the pipe body 1, filling the gap between the sealing ring 212 and the inner wall of the pipe body 1, so as to ensure good sealing between the end of the pipe body 1 and the first flange 2. Then, the first flange 2 is welded and fixed to the end of the pipe body 1. When connecting the pipe body 1 to the alloy bellows 3, first, the sealing gasket 501 in the second sealing assembly 5 is interference-fitted into the first gasket groove 502 or the second gasket groove. In step 503, the first flange 2 and the second flange 4 are brought closer together. The other end of the sealing gasket 501 is then interference-fitted into the first gasket groove 502 or the second gasket groove 503. At this time, the protruding parts at both ends of the sealing gasket 501 will be pressed tightly against the inner walls of the first gasket groove 502 and the second gasket groove 503, filling the gap between the protruding parts at the end of the sealing gasket 501 and the first gasket groove 502 and the second gasket groove 503, so as to ensure good sealing ability between the first flange 2 and the second flange 4. Finally, the first flange 2 and the second flange 4 are connected by the connecting bolts 6. The connection can be made by threading. The first sealing component 21 and the second sealing component 5 can improve the overall sealing effect and prevent leakage. When the temperature of the medium inside the pipe body 1 changes and thermal expansion and contraction occurs, the alloy bellows 3 will deform and expand through its own elasticity. When the pipe body 1 is heated and expands, the alloy bellows 3 will elongate accordingly. When the pipe body 1 is cooled and contracts, the alloy bellows 3 will shorten accordingly. By expanding and contracting itself, the thermal expansion stress inside the pipe body 1 is released, preventing insufficient local sealing pressure at the connection of the pipe body 1, thus making it less likely for leakage to occur at the connection of the pipe body 1.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant and leak-proof titanium alloy pipe, comprising a pipe body (1), characterized in that: One end of the pipe body (1) is provided with a first flange (2), and a first sealing assembly (21) is provided between the first flange (2) and the pipe body (1). An alloy bellows (3) is provided on the side of the first flange (2) away from the pipe body (1). The two ends of the alloy bellows (3) are symmetrically and fixedly connected with a second flange (4). A second sealing assembly (5) is provided between the first flange (2) and the second flange (4). The first sealing assembly (21) includes a flange neck (211), which is fixedly connected to the side of the first flange (2) near the pipe body (1). A sealing ring (212) is interference-fitted to the outer side of the flange neck (211), and the outer diameter of the sealing ring (212) and the inner diameter of the pipe body (1) are mutually matched. The first flange (2) is fixedly welded to the end of the pipe body (1), the flange neck (211) is located inside the pipe body (1), and the outer surface of the sealing ring (212) is tightly fitted to the inner surface of the pipe body (1).

2. The high-temperature resistant and leak-proof titanium alloy pipe according to claim 1, characterized in that: The tube body (1) is a composite structure, which includes an inner tube layer (101), and a reinforcing strip (102) is fixedly connected to the outer surface of the inner tube layer (101) in a spiral winding manner.

3. The high-temperature resistant and leak-proof titanium alloy pipe according to claim 2, characterized in that: An outer tube layer (103) is fixedly connected to the outer side of the inner tube layer (101), and the inner wall of the outer tube layer (103) is provided with a spiral groove (104) that cooperates with the reinforcing strip (102).

4. The high-temperature resistant and leak-proof titanium alloy pipe according to claim 1, characterized in that: The second sealing assembly (5) includes a sealing gasket (501) disposed between the first flange (2) and the second flange (4). The sealing gasket (501) has a dumbbell-shaped cross-section with rounded protrusions at both ends and a flat middle section.

5. A high-temperature resistant and leak-proof titanium alloy pipe according to claim 4, characterized in that: The first flange (2) has a first gasket groove (502) on the side wall near the second flange (4), and the second flange (4) has a second gasket groove (503) on the side wall near the first flange (2).

6. The high-temperature resistant and leak-proof titanium alloy pipe according to claim 5, characterized in that: The two protrusions of the sealing gasket (501) are respectively inserted into the first gasket groove (502) and the second gasket groove (503), and the two protrusions of the sealing gasket (501) are interference-fitted with the first gasket groove (502) and the second gasket groove (503).

7. The high-temperature resistant and leak-proof titanium alloy pipe according to claim 1, characterized in that: A connecting bolt (6) is provided between the first flange (2) and the second flange (4), and the first flange (2) and the second flange (4) are connected by the connecting bolt (6) thread.

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