Stainless steel high pressure pipe with stress concentration and crack propagation prevention

Abstract

The utility model relates to high -pressure pipe structure technical field discloses a stainless steel high -pressure pipe of preventing stress concentration and crack propagation, including stainless steel high -pressure pipe no.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure pipe structure technology, and in particular to a stainless steel high-pressure pipe that prevents stress concentration and crack propagation. Background Technology

[0002] High-pressure pipes are indispensable core pipe materials in industrial production and high-end equipment fields. Their core feature is the ability to stably withstand high-pressure loads. They are specially used for the safe transportation of various high-pressure media and play a key role in ensuring the continuity of industrial processes and the reliability of equipment operation. High-pressure pipes can transport various gases, liquids and slurries under high pressure conditions, including natural gas, hydrogen, oxygen, nitrogen, and industrial compressed air. They are commonly found in gas transmission pipelines, new energy hydrogen energy storage and transportation systems, and aerospace propellant delivery pipelines.

[0003] In existing technologies, traditional high-pressure pipes generally adopt a one-piece smooth pipe wall design. Under high-pressure operating conditions, stress concentration is prone to occur on the pipe surface and at connection points, with stress concentration at bends and joints being particularly prominent. These concentrated stresses are difficult to dissipate under long-term continuous loads, gradually damaging the pipe structure and ultimately easily leading to fatigue cracks that slowly propagate, affecting the stability and safety of the high-pressure pipe in use. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a stainless steel high-pressure pipe that prevents stress concentration and crack propagation.

[0005] This utility model is achieved using the following technical solution: a stainless steel high-pressure pipe for preventing stress concentration and crack propagation, comprising a stainless steel high-pressure pipe, an installation groove on the outer wall of the stainless steel high-pressure pipe, a guide groove at the bottom of the installation groove, the guide groove being formed on the inner wall of the stainless steel high-pressure pipe, an installation slider being slidably connected to the inner wall of the guide groove, the outer wall of the installation slider being slidably connected to the inner wall of the installation groove, a connecting wedge being fixedly connected to the top of the installation slider, the outer wall of the connecting wedge being in contact with the surface of the stainless steel high-pressure pipe, a high-pressure pipe connecting ring being in contact with the surface of the connecting wedge, and an avoidance groove being formed on the surface of the high-pressure pipe connecting ring.

[0006] As a further improvement to the above solution, several mounting slots are provided, and the several mounting slots are symmetrically arranged around the center of the stainless steel high-pressure pipe. Several guide slides are provided, and the several guide slides are symmetrically arranged around the center of the stainless steel high-pressure pipe. Several clearance slots are provided, and the several clearance slots are evenly arranged around the center of the stainless steel high-pressure pipe.

[0007] As a further improvement to the above solution, a plurality of mounting sliders are provided, and the plurality of mounting sliders are symmetrically arranged around the mounting groove. A plurality of connecting inclined blocks are provided, and the plurality of connecting inclined blocks are evenly arranged around the center of the stainless steel high-pressure pipe.

[0008] Through the above technical solution, the stainless steel high-pressure pipe serves as the core load-bearing structure. Several mounting grooves on its outer wall are symmetrically arranged around the center of the stainless steel high-pressure pipe, and several corresponding guide grooves on the inner wall are also symmetrically distributed, providing a basis for stress dispersion and component movement. Several mounting sliders are symmetrically arranged around the mounting grooves, and their outer walls are slidably mounted on the inner walls of the guide grooves through the mounting grooves, allowing them to slide stably along the guide grooves.

[0009] As a further improvement to the above solution, a sealing ring 1 is fixedly connected to the right side of the stainless steel high-pressure pipe 1, and a sealing ring 2 is fixedly connected to the right side of the stainless steel high-pressure pipe 1.

[0010] As a further improvement to the above solution, a stainless steel high-pressure pipe 2 is disposed in contact with the right side of the sealing ring 1, and the stainless steel high-pressure pipe 2 is disposed in contact with the right side of the sealing ring 2 on the left side. The outer wall of the stainless steel high-pressure pipe 2 is slidably connected to the inner wall of the stainless steel high-pressure pipe 1.

[0011] As a further improvement to the above solution, a high-pressure pipe connecting ring two is slidably connected to the outer wall of the stainless steel high-pressure pipe two, and a connecting bolt is slidably connected to the inner wall of the high-pressure pipe connecting ring one. The connecting bolt passes through the inner wall of the high-pressure pipe connecting ring one and extends thereafter. One end of the connecting bolt passes through the inner wall of the high-pressure pipe connecting ring one and extends thereafter. A connecting nut is threadedly connected to the outer wall of the connecting bolt, and the outer wall of the connecting nut contacts and is disposed on the surface of the high-pressure pipe connecting ring two.

[0012] As a further improvement to the above solution, the stainless steel high-pressure pipe II has the same structure as the stainless steel high-pressure pipe I, and a number of connecting bolts are provided, which are evenly arranged around the stainless steel high-pressure pipe II as the center, and a number of connecting nuts are provided.

[0013] Through the above technical solution, the sealing ring 1 and sealing ring 2 fixed on the right side of the stainless steel high-pressure pipe 1 respectively contact the left side surface of the stainless steel high-pressure pipe 2 to form a double sealing structure; the outer wall of the stainless steel high-pressure pipe 2 is slidably connected to the inner wall of the stainless steel high-pressure pipe 1, and the contact area is increased and the local sealing pressure is reduced through the nested connection.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention uses a stainless steel high-pressure pipe as its core load-bearing structure. Several mounting grooves on its outer wall are symmetrically arranged around the center of the stainless steel high-pressure pipe, and several corresponding guide grooves on its inner wall are also symmetrically distributed, providing a basis for stress dispersion and component movement. Several mounting sliders are symmetrically arranged around the mounting grooves, and their outer walls slide on the inner walls of the guide grooves, allowing for stable sliding along the guide grooves. Several connecting wedges fixed to the top of the mounting sliders are evenly arranged around the center of the stainless steel high-pressure pipe, with their outer walls contacting the surface of the stainless steel high-pressure pipe and engaging with the high-pressure pipe connecting ring through their inclined surfaces. Several clearance grooves on the surface of the high-pressure pipe connecting ring are evenly arranged around the center of the stainless steel high-pressure pipe, providing clearance space for the high-pressure pipe connecting ring to be installed on the surface of the connecting wedges, avoiding component interference. When the stainless steel high-pressure pipe is subjected to high-pressure medium pressure or external loads, the symmetrically distributed mounting grooves and guide grooves can break the path of stress concentration, dispersing localized concentrated stress throughout the entire circumference of the pipe. The sliding characteristics of the mounting slider along the guide groove and mounting groove, combined with the inclined structure of the connecting wedge, can transform concentrated stress into dispersed circumferential force, preventing local stress peaks from exceeding the material's tolerance limit. Therefore, multiple stainless steel high-pressure pipes with the same structure can be connected and installed, effectively preventing crack propagation through an intermittent design.

[0015] This invention utilizes a double-sealing structure formed by two sealing rings fixed to the right side of a stainless steel high-pressure pipe, one first and one second, respectively contacting the left side surface of the second stainless steel high-pressure pipe. The outer wall of the second stainless steel high-pressure pipe is slidably connected to the inner wall of the first stainless steel high-pressure pipe. This nested connection increases the contact area, reduces local sealing pressure, and prevents pipe deformation or cracking caused by stress concentration. The high-pressure pipe connecting ring two, slidably connected to the outer wall of the second stainless steel high-pressure pipe, is connected to the first high-pressure pipe connecting ring by several connecting bolts evenly distributed around the second stainless steel high-pressure pipe. These bolts penetrate the inner walls of both the first and second high-pressure pipe connecting rings, and several threaded nuts on their outer walls are pressed tightly against the surface of the second high-pressure pipe connecting ring, achieving a secure connection between the two high-pressure pipes. Because the second stainless steel high-pressure pipe and the first stainless steel high-pressure pipe have the same structure, and the connecting bolts and nuts are evenly distributed, the connection load can be evenly distributed throughout the circumference, avoiding stress concentration caused by excessive tightening of local bolts. Combined with the buffering effect of the double sealing rings, this further reduces the stress peak at the connection point, inhibits crack generation and propagation, and ensures the sealing performance of the high-pressure medium transport. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the mounting groove structure of this utility model; Figure 3This is a cross-sectional structural diagram of the stainless steel high-pressure pipe of this utility model; Figure 4 This is a schematic diagram of the sealing ring structure of this utility model; Figure 5 This is a schematic diagram of the connecting bolt structure of this utility model.

[0017] Explanation of key symbols: 1. Stainless steel high-pressure pipe; 2. Mounting groove; 3. Guide slide groove; 4. Mounting slider; 5. Connecting wedge; 6. High-pressure pipe connecting ring; 7. Clearance groove; 8. Sealing ring; 9. Sealing ring; 10. Stainless steel high-pressure pipe; 11. High-pressure pipe connecting ring; 12. Connecting bolt; 13. Connecting nut. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0019] Example: Please combine Figure 1-5 This embodiment of a stainless steel high-pressure pipe for preventing stress concentration and crack propagation includes a stainless steel high-pressure pipe 1. An installation groove 2 is formed on the outer wall of the stainless steel high-pressure pipe 1. A guide groove 3 is formed at the bottom of the installation groove 2. The guide groove 3 is formed on the inner wall of the stainless steel high-pressure pipe 1. An installation slider 4 is slidably connected to the inner wall of the guide groove 3. The outer wall of the installation slider 4 is slidably connected to the inner wall of the installation groove 2. A connecting wedge 5 is fixedly connected to the top of the installation slider 4. The outer wall of the connecting wedge 5 contacts the surface of the stainless steel high-pressure pipe 1. A high-pressure pipe connecting ring 6 contacts the surface of the connecting wedge 5. An avoidance groove 7 is formed on the surface of the high-pressure pipe connecting ring 6.

[0020] Several mounting slots 2 are provided, and the mounting slots 2 are symmetrically arranged around the center of the stainless steel high-pressure pipe 1. Several guide slides 3 are provided, and the guide slides 3 are symmetrically arranged around the center of the stainless steel high-pressure pipe 1. Several clearance slots 7 are provided, and the clearance slots 7 are evenly arranged around the center of the stainless steel high-pressure pipe 1.

[0021] Several mounting sliders 4 are provided, symmetrically arranged around the mounting groove 2. Several connecting wedges 5 are provided, evenly arranged around the center of the stainless steel high-pressure pipe 1. Several connecting wedges 5 fixed to the top of the mounting sliders 4 are evenly arranged around the center of the stainless steel high-pressure pipe 1, with their outer walls in contact with the surface of the stainless steel high-pressure pipe 1, and simultaneously engaging with the high-pressure pipe connecting ring 6 through their inclined surfaces. Several clearance grooves 7 are evenly arranged around the center of the stainless steel high-pressure pipe 1 on the surface of the high-pressure pipe connecting ring 6, providing clearance space for the high-pressure pipe connecting ring 6 to be installed on the surface of the connecting wedges 5, avoiding interference between components.

[0022] The right side of stainless steel high-pressure pipe 1 is fixedly connected with sealing ring 8, and the right side of stainless steel high-pressure pipe 1 is fixedly connected with sealing ring 2 9.

[0023] A stainless steel high-pressure pipe 10 is installed on the right side of the sealing ring 8, and the left side of the stainless steel high-pressure pipe 10 is installed on the right side of the sealing ring 9. The outer wall of the stainless steel high-pressure pipe 10 is slidably connected to the inner wall of the stainless steel high-pressure pipe 1.

[0024] The outer wall of the stainless steel high-pressure pipe 2 10 is slidably connected to the high-pressure pipe connecting ring 2 11, and the inner wall of the high-pressure pipe connecting ring 1 6 is slidably connected to the connecting bolt 12. The connecting bolt 12 passes through the inner wall of the high-pressure pipe connecting ring 1 6 and extends thereafter. One end of the connecting bolt 12 passes through the inner wall of the high-pressure pipe connecting ring 2 11 and extends thereafter. The outer wall of the connecting bolt 12 is threadedly connected to the connecting nut 13, and the outer wall of the connecting nut 13 contacts and is disposed on the surface of the high-pressure pipe connecting ring 2 11.

[0025] The stainless steel high-pressure pipe 2 (10) has the same structure as the stainless steel high-pressure pipe 1 (1). Several connecting bolts 12 are evenly distributed around the stainless steel high-pressure pipe 2 (10). Several connecting nuts 13 are also provided. By having the connecting bolts 12 penetrate the inner walls of the high-pressure pipe connecting ring 1 (6) and the high-pressure pipe connecting ring 2 (11), and having the connecting nuts 13 threaded onto their outer walls tightly pressed against the surface of the high-pressure pipe connecting ring 2 (11), a secure connection between the two high-pressure pipes is achieved. Because the stainless steel high-pressure pipe 2 (10) and the stainless steel high-pressure pipe 1 (1) have the same structure, and the connecting bolts 12 and connecting nuts 13 are evenly distributed, the connection load can be evenly distributed throughout the circumference, avoiding stress concentration caused by excessive tightening of local bolts.

[0026] The implementation principle of a stainless steel high-pressure pipe for preventing stress concentration and crack propagation in this embodiment is as follows: A stainless steel high-pressure pipe 1 serves as the core load-bearing structure. Several mounting grooves 2 are symmetrically arranged around the center of the stainless steel high-pressure pipe 1 on its outer wall. Correspondingly, several guide grooves 3 are symmetrically distributed on the inner wall, providing a basis for stress dispersion and component movement. Several mounting sliders 4 are symmetrically arranged around the mounting grooves 2, and their outer walls are slidably mounted on the inner wall of the guide grooves 3 via the mounting grooves 2, allowing for stable sliding along the guide grooves 3. Several connecting inclined blocks 5 are fixed to the top of the mounting sliders 4, evenly arranged around the center of the stainless steel high-pressure pipe 1. Their outer walls contact the surface of the stainless steel high-pressure pipe 1, and their inclined surfaces cooperate with the high-pressure pipe connecting ring 6. Several clearance grooves 7 are evenly arranged around the center of the stainless steel high-pressure pipe 1 on the surface of the high-pressure pipe connecting ring 6, providing clearance space for the high-pressure pipe connecting ring 6 to be installed onto the surface of the connecting inclined blocks 5, avoiding component interference. When the stainless steel high-pressure pipe 1 is subjected to high-pressure medium pressure or external load, the symmetrically distributed mounting groove 2 and guide slide 3 can break the stress concentration path and disperse the local concentrated stress to the entire circumference of the pipe. The sliding characteristics of the mounting slider 4 along the guide slide 3 and mounting groove 2, combined with the inclined structure of the connecting wedge block 5, can transform the concentrated stress into a dispersed circumferential force, preventing the local stress peak from exceeding the material's tolerance limit. Then, through the sealing ring 8 and sealing ring 9 fixed on the right side of the stainless steel high-pressure pipe 1, they respectively contact the left side surface of the stainless steel high-pressure pipe 10, forming a double sealing structure. The outer wall of the stainless steel high-pressure pipe 10 is slidably connected to the inner wall of the stainless steel high-pressure pipe 1, and the nested connection increases the contact area, reduces local sealing pressure, and avoids pipe deformation or cracking caused by sealing stress concentration. The high-pressure pipe connecting ring 2 11, which is slidably connected to the outer wall of the stainless steel high-pressure pipe 2 10, is connected to the high-pressure pipe connecting ring 1 6 by a number of connecting bolts 12 evenly arranged around the stainless steel high-pressure pipe 2 10. The connecting bolts 12 penetrate the inner walls of both the high-pressure pipe connecting ring 1 6 and the high-pressure pipe connecting ring 2 11, and a number of connecting nuts 13, threaded onto their outer walls, are pressed tightly against the surface of the high-pressure pipe connecting ring 2 11, thus achieving a secure connection between the two high-pressure pipes. Since the stainless steel high-pressure pipe 2 10 has the same structure as the stainless steel high-pressure pipe 1 1, and the connecting bolts 12 and connecting nuts 13 are evenly distributed, the connection load can be evenly distributed throughout the circumference, avoiding stress concentration caused by excessive tightening of local bolts. Combined with the buffering effect of the double sealing rings, the stress peak at the connection point is further reduced, inhibiting crack generation and propagation, while ensuring the sealing performance of the high-pressure medium transmission.

[0027] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A stainless steel high-pressure pipe designed to prevent stress concentration and crack propagation, characterized in that, The system includes a stainless steel high-pressure pipe (1), an installation groove (2) is provided on the outer wall of the stainless steel high-pressure pipe (1), a guide groove (3) is provided at the bottom of the installation groove (2), the guide groove (3) is provided on the inner wall of the stainless steel high-pressure pipe (1), an installation slider (4) is slidably connected to the inner wall of the guide groove (3), the outer wall of the installation slider (4) is slidably connected to the inner wall of the installation groove (2), a connecting wedge (5) is fixedly connected to the top of the installation slider (4), the outer wall of the connecting wedge (5) is in contact with the surface of the stainless steel high-pressure pipe (1), a high-pressure pipe connecting ring (6) is in contact with the surface of the connecting wedge (5), and an avoidance groove (7) is provided on the surface of the high-pressure pipe connecting ring (6).

2. The stainless steel high-pressure pipe for preventing stress concentration and crack propagation as described in claim 1, characterized in that: The mounting groove (2) is provided in several places, and the mounting groove (2) is symmetrically arranged around the center of the stainless steel high pressure pipe (1). The guide slide (3) is provided in several places, and the guide slide (3) is symmetrically arranged around the center of the stainless steel high pressure pipe (1). The clearance groove (7) is provided in several places, and the clearance groove (7) is evenly arranged around the center of the stainless steel high pressure pipe (1).

3. The stainless steel high-pressure pipe for preventing stress concentration and crack propagation as described in claim 1, characterized in that: The mounting slider (4) is provided in several units, and the mounting slider (4) is symmetrically arranged with the mounting groove (2) as the center. The connecting inclined block (5) is provided in several units, and the connecting inclined block (5) is evenly arranged with the center of the stainless steel high pressure pipe (1).

4. The stainless steel high-pressure pipe for preventing stress concentration and crack propagation as described in claim 1, characterized in that: A sealing ring 1 (8) is fixedly connected to the right side of the stainless steel high-pressure pipe 1 (1), and a sealing ring 2 (9) is fixedly connected to the right side of the stainless steel high-pressure pipe 1 (1).

5. A stainless steel high-pressure pipe for preventing stress concentration and crack propagation as described in claim 4, characterized in that: The right side of the sealing ring 1 (8) is contacted by a stainless steel high-pressure pipe 2 (10), the left side of the stainless steel high-pressure pipe 2 (10) is contacted by the right side of the sealing ring 2 (9), and the outer wall of the stainless steel high-pressure pipe 2 (10) is slidably connected to the inner wall of the stainless steel high-pressure pipe 1 (1).

6. A stainless steel high-pressure pipe for preventing stress concentration and crack propagation as described in claim 5, characterized in that: The outer wall of the stainless steel high-pressure pipe two (10) is slidably connected to the high-pressure pipe connecting ring two (11), and the inner wall of the high-pressure pipe connecting ring one (6) is slidably connected to the connecting bolt (12). The connecting bolt (12) penetrates the inner wall of the high-pressure pipe connecting ring one (6) and extends thereafter. One end of the connecting bolt (12) penetrates the inner wall of the high-pressure pipe connecting ring two (11) and extends thereafter. The outer wall of the connecting bolt (12) is threaded with a connecting nut (13), and the outer wall of the connecting nut (13) is in contact with the surface of the high-pressure pipe connecting ring two (11).

7. A stainless steel high-pressure pipe for preventing stress concentration and crack propagation as described in claim 6, characterized in that: The stainless steel high-pressure pipe II (10) has the same structure as the stainless steel high-pressure pipe I (1). There are several connecting bolts (12), which are evenly arranged around the stainless steel high-pressure pipe II (10). There are several connecting nuts (13).

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