High-strength titanium alloy thick-wall pipe assembly
Through the combined design of inner guard pipe, outer guard pipe and flange, the problem of crevice corrosion at the connection of titanium alloy thick wall pipe is solved, and the double protection and sealing enhancement of the connection of thick wall pipe is achieved, preventing corrosion and Leakage of liquid.
Patent Information
- Application Number
- CN202421657145.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-13
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-07-13
AI Technical Summary
Titanium alloy thick-walled pipes are prone to gaps at pipe connections, resulting in corrosion. Especially when transporting chloride-containing media, the oxygen concentration in the gaps is low and the chloride and hydrogen ions are high, resulting in a decrease in pH value, which in turn reduces the strength of the pipeline joints and May cause liquid leakage.
The inner guard pipe is used to seal the gap at the connection of thick-walled tubes, and a second protection is formed with the flange through the outer guard pipe. Combined with the limit sleeve, the strength at the connection is strengthened to prevent corrosion. Specific measures include sliding connection between the inner guard pipe and the installation groove, fitting between the sealing groove and the sealing block, extrusion sealing of the outer guard pipe and the flange, and the use of the limit sleeve to prevent corrosion.
It effectively isolates the gap between the connection between the medium and the thick-walled pipe in the pipeline, forming double protection, enhancing the strength and sealing of the joints, preventing corrosion, and ensuring the sealing of the pipeline and the stability of the joints.
Smart Images
Figure CN222209355U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a titanium alloy thick-walled pipe assembly, in particular to a high-strength titanium alloy thick-walled pipe assembly, and belongs to the technical field of thick-walled pipe assemblies. Background Art
[0002] Thick-walled pipe is a pipe with thicker wall, usually used to withstand working environment under harsh conditions such as high pressure, high temperature, corrosive media, etc. Thick-walled pipe is widely used in many industrial fields such as petroleum, chemical industry, electric power, aerospace, etc.
[0003] Among them, titanium alloy thick-walled pipes are mainly used to transport highly corrosive and seriously dangerous media due to the excellent corrosion resistance of titanium alloys. However, thick-walled pipes are very prone to cracks at the pipe joints. When transporting media containing chlorides, electrolyte solutions will accumulate in the cracks, resulting in low oxygen concentrations and high chloride and hydrogen ion concentrations in the cracks, causing the pH value in the local area to drop, leading to crevice corrosion, and then causing the strength of the pipe joints to decrease or even leak.
[0004] Therefore, there is an urgent need to improve the high-strength titanium alloy thick-walled pipe assembly to solve the above-mentioned problems. Utility Model Content
[0005] The purpose of the utility model is to provide a high-strength titanium alloy thick-walled pipe assembly, which seals the gap at the connection of the thick-walled pipe by an inner protective pipe, so that the medium transported in the pipeline is isolated from the gap at the connection of the thick-walled pipe. At the same time, a second layer of protection is formed by the extrusion of the outer protective pipe, the flange and the thick-walled pipe, and the strength of the connection is strengthened by the limiting sleeve, which effectively prevents the corrosion of the gap at the connection of the thick-walled pipe and protects the joint strength and the sealing of the pipeline joint.
[0006] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the utility model includes: an inner protective tube, two thick-walled tubes and an outer protective tube, one end of the thick-walled tube is provided with an installation groove, the inner wall of the installation groove is respectively slidably connected with the two ends of the inner protective tube, a No. 1 sealing groove is provided at the bottom of the installation groove, and sealing blocks corresponding to the No. 1 sealing groove are provided at both ends of the inner protective tube, and the sealing blocks are fitted with the No. 1 sealing groove. A flange is fixedly connected to the outer wall of the thick-walled tube, the outer protective tube is sleeved on the outer surface of the thick-walled tube, and the two ends of the outer protective tube are in contact with the flange, and a limiting sleeve is sleeved on the outer surface of the outer protective tube, and the length of the outer protective tube is greater than the length of the limiting sleeve.
[0007] Preferably, a No. 2 sealing groove is provided on the surfaces of both ends of the outer protective tube, and a limiting installation groove is provided on the surface of the flange plate in contact with the outer protective tube. The inner diameter of the limiting installation groove is the same as the inner diameter of the outer protective tube, and the outer diameter of the limiting installation groove is the same as the outer diameter of the limiting sleeve.
[0008] Preferably, a buffer boss is fixedly connected to the outer wall surface of the inner protective tube, and the buffer boss is located in the middle position of the outer wall surface of the inner protective tube.
[0009] Preferably, the cross-section of the No. 1 sealing groove is a right-angled trapezoid and the hypotenuse of the right-angled trapezoid is located on the side close to the inner wall of the thick-walled tube.
[0010] Preferably, the inner protective tube comprises a corrosion-resistant layer and a sealing layer, and the corrosion-resistant layer is fixedly connected to the inner wall of the sealing layer.
[0011] Preferably, the flange is connected by a plurality of bolt groups.
[0012] The utility model has at least the following beneficial effects:
[0013] 1. The inner protective tube seals the gap at the thick-walled pipe joint, so that the medium transported in the pipeline is isolated from the gap at the thick-walled pipe joint. At the same time, the outer protective tube, flange and thick-walled pipe are squeezed to form a second layer of protection, and the limit sleeve strengthens the strength of the joint, which effectively prevents the corrosion of the gap at the thick-walled pipe joint and protects the joint strength and sealing of the pipeline joint. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0015] Figure 1 An isometric structural schematic diagram provided for the utility model;
[0016] Figure 2 A front view provided for the utility model;
[0017] Figure 3 A cross-sectional view provided for the utility model;
[0018] Figure 4 This is an enlarged schematic diagram of point A provided by the utility model;
[0019] Figure 5 This is an enlarged schematic diagram of point B provided by the utility model.
[0020] In the figure, 1. inner protective tube; 2. thick-walled tube; 3. outer protective tube; 4. installation groove; 5. No. 1 sealing groove; 6. sealing block; 7. flange; 8. limit sleeve; 9. No. 2 sealing groove; 10. buffer boss; 11. corrosion-resistant layer; 12. sealing layer; 13. bolt group; 14. limit installation groove. DETAILED DESCRIPTION
[0021] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.
[0022] like Figure 1-Figure 5 As shown, the high-strength titanium alloy thick-walled tube assembly provided in this embodiment includes an inner protective tube 1, two thick-walled tubes 2 and an outer protective tube 3. A mounting groove 4 is provided at one end of the thick-walled tube 2. The inner protective tube 1 is inserted into the mounting groove 4, and the outer wall of the inner protective tube 1 fits with the inner wall of the mounting groove 4. A No. 1 sealing groove 5 is provided at the bottom of the mounting groove 4. Sealing blocks 6 corresponding to the No. 1 sealing groove 5 are provided at both ends of the inner protective tube 1. The inner protective tube 1 is inserted into the bottom of the mounting groove 4, and the sealing block 6 fits with the No. 1 sealing groove 5. The outer protective tube 3 is sleeved on the outer surface of the thick-walled tube 2, and the limiting sleeve is The tube 8 is sleeved on the outer wall of the outer protective tube 3, and the outer protective tube 3 is moved so that the joint of the two thick-walled tubes 2 is in the middle of the outer protective tube 3. The length of the outer protective tube 3 is greater than the length of the limiting sleeve 8. The surfaces of both ends of the outer protective tube 3 are provided with No. 2 sealing grooves 9. The surface of the flange 7 in contact with the outer protective tube 3 is provided with a limiting installation groove 14. The inner diameter of the limiting installation groove 14 is the same as the inner diameter of the outer protective tube 3, and the outer diameter of the limiting installation groove 14 is the same as the outer diameter of the limiting sleeve 8. Before installation, the flange 7 is sleeved on the thick-walled tube 2, and the two flanges 7 are moved respectively so that the bottom surface of the limiting installation groove 14 is aligned with the inner diameter of the outer protective tube 3. The two end surfaces of the outer protective tube 3 are in contact, and then the flange 7 is welded and fixed to the outer wall of the thick-walled tube 2. The flange 7 is connected by a plurality of bolt groups 13, and then the bolts are screwed to squeeze the outer protective tube 3. The two ends of the outer protective tube 3 and the flange 7 as well as the inner wall of the outer protective tube 3 and the thick-walled tube 2 are squeezed against each other to form a seal. When the flange 7 contacts the limiting sleeve 8, the installation is completed. At the same time, the outer wall of the limiting sleeve 8 contacts the side wall of the limiting installation groove 14. The limiting sleeve 8 is made of metal material, which strengthens the connection of the thick-walled tube 2. At the same time, the thick-walled tube 2 is The inner protective tube 1 is extruded. Since the cross section of the No. 1 sealing groove 5 is a right-angled trapezoid and the hypotenuse of the right-angled trapezoid is located on the side close to the inner wall of the thick-walled tube 2, the sealing block 6 and the No. 1 seal are more closely fitted under the extrusion state. The inner protective tube 1 seals the gap at the connection of the thick-walled tube 2, so that the medium transported in the pipeline is isolated from the gap at the connection of the thick-walled tube 2. At the same time, the second protection is formed by the extrusion of the outer protective tube 3, the flange 7 and the thick-walled tube 2, and the strength of the connection is enhanced by the limiting sleeve 8, which effectively prevents the corrosion of the gap at the connection of the thick-walled tube 2.
[0023] Further, such as Figure 3As shown, a buffer boss 10 is fixedly connected to the outer wall surface of the inner protective tube 1, and the buffer boss 10 is located in the middle position of the outer wall surface of the inner protective tube 1. When the bolts are not tightened, the two side surfaces of the buffer boss 10 are respectively in contact with the end surfaces of the thick-walled tube 2. During the bolt tightening process, the thick-walled tube 2 squeezes the buffer boss 10 to form a seal on the pipeline connection. With the changes in ambient temperature and the pressure of the transport medium, the pipeline will undergo slight deformation. After the deformation, the elasticity of the buffer boss 10 ensures that the two side surfaces of the buffer boss 10 are still in contact with the end surfaces of the thick-walled tube 2.
[0024] Among them, Figure 5 As shown, the inner protective tube 1 includes a corrosion-resistant layer 11 and a sealing layer 12. The corrosion-resistant layer 11 is fixedly connected to the inner wall of the sealing layer 12, and the corrosion-resistant layer 11 is made of polytetrafluoroethylene.
[0025] Among them, Figure 4 As shown, the outer protective tube 3 and the sealing layer 12 are both made of fluororubber.
[0026] like Figure 1-Figure 5As shown, the principle of the high-strength titanium alloy thick-walled tube assembly provided in this embodiment is as follows: the inner protective tube 1 is inserted into the installation groove 4, the outer wall of the inner protective tube 1 is fitted with the inner wall of the installation groove 4, a No. 1 sealing groove 5 is provided at the bottom of the installation groove 4, and sealing blocks 6 corresponding to the No. 1 sealing groove 5 are provided at both ends of the inner protective tube 1. The inner protective tube 1 is inserted into the bottom of the installation groove 4, and the sealing block 6 is fitted with the No. 1 sealing groove 5. The outer protective tube 3 is sleeved on the outer surface of the thick-walled tube 2, and the limiting sleeve 8 is sleeved on the outer wall of the outer protective tube 3. The outer protective tube 3 is moved so that the two thick The joint of the wall tube 2 is located in the middle of the outer protective tube 3. The length of the outer protective tube 3 is greater than the length of the limiting sleeve 8. The surfaces of the two ends of the outer protective tube 3 are provided with No. 2 sealing grooves 9. The surface of the flange 7 in contact with the outer protective tube 3 is provided with a limiting installation groove 14. The inner diameter of the limiting installation groove 14 is the same as the inner diameter of the outer protective tube 3. The outer diameter of the limiting installation groove 14 is the same as the outer diameter of the limiting sleeve 8. Before installation, the flange 7 is put on the thick-walled tube 2, and the two flanges 7 are moved respectively to make the bottom surface of the limiting installation groove 14 contact the two end surfaces of the outer protective tube 3, and then The flange 7 is welded and fixed to the outer wall of the thick-walled tube 2. The flange 7 is connected by a plurality of bolt groups 13. Then the bolts are screwed to squeeze the outer protective tube 3. The two ends of the outer protective tube 3 and the flange 7 as well as the inner wall of the outer protective tube 3 and the thick-walled tube 2 are squeezed against each other to form a seal. The installation is completed when the flange 7 contacts the limiting sleeve 8. At the same time, the outer wall of the limiting sleeve 8 contacts the side wall of the limiting installation groove 14. The limiting sleeve 8 is made of metal material to strengthen the connection of the thick-walled tube 2. At the same time, the thick-walled tube 2 squeezes the inner protective tube 1. Since the cross-section of the No. 1 sealing groove 5 is a right-angled trapezoid and the hypotenuse of the right-angled trapezoid is located on the side close to the inner wall of the thick-walled tube 2, the sealing block 6 and the No. 1 seal are more closely fitted under the extrusion state, and the gap at the connection of the thick-walled tube 2 is sealed by the inner protective tube 1, so that the medium transported in the pipeline is isolated from the gap at the connection of the thick-walled tube 2. At the same time, a second line of protection is formed by the extrusion of the outer protective tube 3, the flange 7 and the thick-walled tube 2, and the strength of the connection is enhanced by the limiting sleeve 8, thereby effectively preventing the corrosion of the gap at the connection of the thick-walled tube 2.
[0027] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.
[0028] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.
[0029] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. A high-strength titanium alloy thick-walled tube assembly, comprising an inner protective tube (1), two thick-walled tubes (2) and an outer protective tube (3), Features: A mounting groove (4) is provided at one end of the thick-walled tube (2), and the inner wall of the mounting groove (4) is respectively slidably connected to the two ends of the inner protective tube (1). A No. 1 sealing groove (5) is provided at the bottom of the mounting groove (4). Sealing blocks (6) corresponding to the No. 1 sealing groove (5) are provided at both ends of the inner protective tube (1), and the sealing blocks (6) are in contact with the No. 1 sealing groove (5). A flange (7) is fixedly connected to the outer wall of the thick-walled tube (2), and the outer protective tube (3) is sleeved on the outer surface of the thick-walled tube (2), and the two ends of the outer protective tube (3) are in contact with the flange (7). A limiting sleeve (8) is sleeved on the outer surface of the outer protective tube (3), and the length of the outer protective tube (3) is greater than the length of the limiting sleeve (8).
2. A high-strength titanium alloy thick-walled pipe assembly according to claim 1, Features: The surfaces of both ends of the outer protective tube (3) are provided with No. 2 sealing grooves (9), and the surface of the flange (7) in contact with the outer protective tube (3) is provided with a limit installation groove (14), the inner diameter of the limit installation groove (14) is the same as the inner diameter of the outer protective tube (3), and the outer diameter of the limit installation groove (14) is the same as the outer diameter of the limit sleeve (8).
3. A high-strength titanium alloy thick-walled pipe assembly according to claim 1, Features: A buffer boss (10) is fixedly connected to the outer wall surface of the inner protective tube (1), and the buffer boss (10) is located in the middle of the outer wall surface of the inner protective tube (1).
4. A high-strength titanium alloy thick-walled pipe assembly according to claim 1, Features: The cross section of the No. 1 sealing groove (5) is a right-angled trapezoid, and the hypotenuse of the right-angled trapezoid is located on the side close to the inner wall of the thick-walled tube (2).
5. A high-strength titanium alloy thick-walled pipe assembly according to claim 1, Features: The inner protective tube (1) comprises a corrosion-resistant layer (11) and a sealing layer (12), wherein the corrosion-resistant layer (11) is fixedly connected to the inner wall of the sealing layer (12).
6. A high-strength titanium alloy thick-walled pipe assembly according to claim 1, Features: The flange (7) is connected via a plurality of bolt groups (13).