Thick-wall seamless steel pipe resistant to hydrogen sulfide stress corrosion
By designing mobile grooves, moving blocks and bolt fixing structures on seamless steel pipes, combined with annular rubber sealing gaskets and corrosion-resistant coatings, the problems of loosening and hydrogen sulfide corrosion at seamless steel pipe connections are solved, and stable connections and high corrosion resistance are achieved.
Patent Information
- Application Number
- CN202421564770.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-03
AI Technical Summary
Existing seamless steel pipes are prone to loosening at the connections, affecting installation and fixation, and are seriously threatened by hydrogen sulfide stress corrosion in the petrochemical industry.
A thick-wall seamless steel pipe with hydrogen sulfide stress corrosion is designed. The outer side wall of the pipe body is equipped with a moving groove and a moving block. The connecting sleeve is fixed by bolts, combined with an annular rubber gasket and a hydrogen sulfide stress corrosion coating to achieve a stable connection between the pipe body and the connection end.
It realizes simple and convenient installation of seamless steel pipes, avoids loosening problems, and improves the corrosion resistance of the pipe body through anti-hydrogen sulfide stress corrosion coating.
Smart Images
Figure CN223049624U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of seamless steel pipes, in particular to a thick-walled seamless steel pipe resistant to hydrogen sulfide stress corrosion. Background Technique
[0002] At present, in the petrochemical industry, with the increase in the processing volume of high-sulfur and high-acid crude oil, the corrosion of equipment by hydrogen sulfide is becoming more and more serious, and the seamless steel pipes used for transportation will also be corroded.
[0003] For the existing seamless steel pipes, reinforcement is carried out at the joints. When the existing reinforcement equipment is generally installed externally, it is relatively easy to loosen after installation, which will affect the installation and fixation of the seamless steel pipes. Therefore, it is necessary to propose a thick-walled seamless steel pipe resistant to hydrogen sulfide stress corrosion. Content of the Utility Model
[0004] The purpose of the utility model is to provide a thick-walled seamless steel pipe resistant to hydrogen sulfide stress corrosion to solve the problems raised in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A thick-walled seamless steel pipe resistant to hydrogen sulfide stress corrosion, including a pipe body. Two moving grooves are opened on the outer side wall of the pipe body. A moving block is slidably connected in each of the two moving grooves. One end of each of the two moving blocks penetrates and extends outside the pipe body and is jointly fixedly connected with a connecting sleeve. Two first threaded holes are jointly penetrated through the connecting sleeve and the two moving blocks. A threaded groove is opened at the bottom of each of the two moving grooves. Two first bolts are jointly threadedly connected in the two first threaded holes and the two threaded grooves. Two second threaded holes are penetrated through the connecting sleeve. A second bolt is threadedly connected in each of the two second threaded holes.
[0006] Preferably, an annular groove is opened at one end opening of the pipe body, and an annular rubber sealing gasket is sleeved in the annular groove.
[0007] Preferably, an anti-hydrogen sulfide stress corrosion coating is smeared on the inner wall of the pipe body.
[0008] Preferably, the connecting sleeve is slidably connected in the pipe body, and the inner wall of the connecting sleeve abuts against the outer side wall of the pipe body.
[0009] Preferably, the two first threaded holes, the second threaded holes and the threaded grooves are all arranged vertically.
[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The connection end is inserted into the annular groove and abuts against the annular rubber gasket. Then, the connection sleeve can be moved and sleeved on the connection end until the moving block abuts against the groove wall of the moving groove. At this time, by rotating the first bolt, it can be driven to descend and fix the connection sleeve. Then, by rotating the second bolt, the driver is connected to the connection end to fix it, thereby completing the fixation between the pipe body and the connection end, making the overall installation relatively simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 is an external structural schematic diagram of the connection state of the present utility model;
[0012] Figure 2 is an external structural schematic diagram of the standby state of the present utility model;
[0013] Figure 3 is an internal structural schematic diagram of the connection state of the present utility model;
[0014] Figure 4 is an internal structural schematic diagram of the standby state of the present utility model.
[0015] In the figure: 1, pipe body; 2, moving groove; 3, moving block; 4, connection sleeve; 5, first threaded hole; 6, threaded groove; 7, first bolt; 8, second threaded hole; 9, second bolt; 10, annular groove; 11, annular rubber gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0017] Please refer to Figures 1-4 , the present utility model provides a technical solution: an anti-hydrogen sulfide stress corrosion thick-walled seamless steel pipe, including a pipe body 1. Two moving grooves 2 are opened on the outer side wall of the pipe body 1. A moving block 3 is slidably connected in each of the two moving grooves 2. One end of each of the two moving blocks 3 penetrates and extends outside the pipe body 1 and is commonly fixedly connected to a connection sleeve 4. Two first threaded holes 5 are commonly penetrated and opened on the connection sleeve 4 and the two moving blocks 3. A threaded groove 6 is opened at the bottom of each of the two moving grooves 2. Two first bolts 7 are commonly threadedly connected in the two first threaded holes 5 and the two threaded grooves 6. Two second threaded holes 8 are penetrated and opened on the connection sleeve 4. A second bolt 9 is threadedly connected in each of the two second threaded holes 8.
[0018] One end of the pipe body 1 is open with an annular groove 10, and an annular rubber gasket 11 is sleeved in the annular groove 10. The connecting end of the external pipe is inserted into the annular groove 10 in the pipe body 1 and pushed to abut against the annular rubber gasket 11.
[0019] A layer of anti-hydrogen sulfide stress corrosion coating is applied on the inner wall of the pipe body 1.
[0020] The connecting sleeve 4 is slidably connected in the pipe body 1, and the inner wall of the connecting sleeve 4 abuts against the outer side wall of the pipe body 1, so that it can only move parallelly.
[0021] The two first threaded holes 5, the second threaded hole 8 and the threaded groove 6 are all arranged vertically, so that when the first bolt 7 and the second bolt 9 are rotated, they will be driven to descend and be threadedly connected with the first threaded hole 5, the second threaded hole 8 and the threaded groove 6 respectively.
[0022] Specifically, when using the present utility model, first insert the connecting end of the external pipe into the annular groove 10 in the pipe body 1 and push it to abut against the annular rubber gasket 11. At this time, the connecting sleeve 4 can be moved and sleeved on the connecting end of the external pipe. The connecting sleeve 4 drives the moving block 3 to move in the moving groove 2, so that it can only move parallelly. When the moving block 3 moves to the end of the moving groove 2, the first threaded hole 5 coincides with the threaded groove 6. Then the first bolt 7 can be rotated and threadedly connected with the first threaded hole 5 and the threaded groove 6, so as to fix the connecting sleeve 4. Then the external pipe can be rotated to make the installation threaded hole coincide with the second threaded hole 8, and then the second bolt 9 is rotated to make it threadedly connected with the installation threaded hole and the second threaded hole 8, so that the connecting sleeve 4 is connected with the connecting end of the external pipe and the pipe body 1 at the same time, thus completing the reinforcement after the pipe installation and the overall installation is relatively simple and convenient.
[0023] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A thick-walled seamless steel pipe resistant to hydrogen sulfide stress corrosion, comprising a pipe body (1), characterized in that: Two movable grooves (2) are provided on the outer wall of the tube body (1), and a movable block (3) is slidably connected in each of the two movable grooves (2). One end of each of the two movable blocks (3) extends through the tube body (1) and is fixedly connected to a connecting sleeve (4). Two first threaded holes (5) are provided through the connecting sleeve (4) and the two movable blocks (3). A threaded groove (6) is provided at the bottom of each of the two movable grooves (2). Two first bolts (7) are threadedly connected in each of the two first threaded holes (5) and the two threaded grooves (6). Two second threaded holes (8) are provided through the connecting sleeve (4), and a second bolt (9) is threadedly connected in each of the two second threaded holes (8).
2. The thick-walled seamless steel pipe resistant to hydrogen sulfide stress corrosion according to claim 1, characterized in that: An annular groove (10) is opened at one end of the tube body (1), and an annular rubber sealing gasket (11) is sleeved in the annular groove (10).
3. The thick-walled seamless steel pipe resistant to hydrogen sulfide stress corrosion according to claim 1, characterized in that: A layer of hydrogen sulfide stress corrosion resistant coating is applied on the inner wall of the pipe body (1).
4. The thick-walled seamless steel pipe resistant to hydrogen sulfide stress corrosion according to claim 1, characterized in that: The connecting sleeve (4) is slidably connected in the tube body (1), and the inner wall of the connecting sleeve (4) abuts against the outer wall of the tube body (1).
5. The thick-walled seamless steel pipe resistant to hydrogen sulfide stress corrosion according to claim 1, characterized in that: The two first threaded holes (5), the second threaded hole (8) and the threaded groove (6) are all arranged vertically.