Oil and gas pipeline stress relief supporting system
By using hydraulic clamping and screw drive mechanisms in the oil and gas pipeline stress elimination support system, the vibration mode of the oil and gas pipeline is changed, and the problems of high energy consumption and low efficiency in the welding stress elimination process in the prior art are solved, and more efficient stress elimination is achieved.
Patent Information
- Application Number
- CN202510080627.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-04-22
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the long-distance laying process of oil and gas pipelines, the prior art is difficult to effectively reduce energy consumption and improve efficiency in the process of welding stress elimination.
A stress-removing support system for oil and gas pipelines is adopted, which includes a hydraulic clamping and platform bracket. The oil and gas pipelines are radially squeezed and fixed by hydraulic support rollers, and the position of the hydraulic clamping is adjusted through the screw drive mechanism to change the vibration mode of the oil and gas pipelines to avoid the resonance of the entire long oil and gas pipelines at the same time.
The system can reduce energy consumption, improve the efficiency of stress elimination, suppress the resonance of the entire oil and gas pipeline through vibrations within a local range, and ensure the uniformity and efficiency of stress elimination.
Smart Images
Figure CN119860471A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of supporting equipment for stress elimination during the laying of oil and gas pipelines, and may specifically involve an international patent classification number of F16L1 / 00. Background Art
[0002] The long-distance oil and gas pipeline is laid by connecting sections of oil and gas pipelines through flanges or welding. After the oil and gas pipelines are connected, the joints should be stress-relieved, especially for welding connections. At present, there are several mainstream methods for eliminating stress in oil and gas pipelines: 1. Heat treatment method, uniformly heat the joints, generally heated to about 550-650℃, then keep warm for a certain period of time, and finally slowly cool. This method can effectively eliminate most welding stress, but the cost is high and the time is long. 2. Mechanical hammering method, which causes a slight plastic deformation of the weld metal to release welding stress. The knocking force should be moderate, usually a small hammer of 0.5-1.0kg, with a frequency of about 100-200 times per minute to avoid damaging the weld. 3. Vibration aging method: Connect the oil and gas pipeline to the fixture of the vibration aging instrument, and resonate the oil and gas pipeline by controlling the vibration frequency and time, so that the welding stress is relaxed. This method is highly efficient and easy to operate.
[0003] When the vibration aging instrument applies vibration to the oil and gas pipeline and the vibration frequency reaches the natural frequency of the oil and gas pipeline, the oil and gas pipeline will resonate. In the resonant state, relative slip occurs between the metal lattices inside the oil and gas pipeline, and the microstructure changes, so that the residual stress generated by welding is relaxed and homogenized. Due to the good effect, the use of vibration aging to eliminate stress has become the mainstream.
[0004] When using a vibration stress tester to eliminate stress on a long oil and gas pipeline, the long oil and gas pipeline should be properly supported and restrained. Elastic support or restraint devices are set at key locations of the oil and gas pipeline, which can adjust the vibration mode of the oil and gas pipeline, change the natural frequency distribution of the oil and gas pipeline, and allow the oil and gas pipeline to produce a resonance form that is conducive to stress elimination under lower energy excitation, thereby reducing energy consumption. Summary of the invention
[0005] The technical problem to be solved by the present invention is to provide an oil and gas pipeline stress elimination support system in response to the above-mentioned technical deficiencies, which can change the vibration characteristics of the oil and gas pipeline. Through hydraulic support, the vibration mode of the long oil and gas pipeline can be divided, the length of the resonance section can be shortened, and the boundary conditions of the oil and gas pipeline can be increased, so that the oil and gas pipeline can vibrate in a local range, avoiding the simultaneous resonance of the entire long oil and gas pipeline, thereby reducing energy consumption and improving the efficiency of stress elimination.
[0006] The technical solution adopted by the present invention is to provide an oil and gas pipeline stress relief support system, which is used to support the oil and gas pipeline when the oil and gas pipeline is subjected to vibration stress relief, including: Hydraulic clamp; the hydraulic clamp comprises a C-shaped bracket and at least three hydraulic support rollers mounted on the C-shaped bracket; in a stamping state, the at least three hydraulic support rollers are configured to radially squeeze and fix the oil and gas pipeline; in a depressurized state, a release gap is formed between the space enclosed by the at least three hydraulic support rollers and the oil and gas pipeline, and the oil and gas pipeline can pass upward through the upper notch of the C-shaped bracket through the release gap; Platform bracket; the platform bracket is provided with a slide rail and a driving screw rod in the length direction of the oil and gas pipeline; the number of the hydraulic clamps is two and each is distributed on both sides of the length direction of the platform bracket; each of the hydraulic clamps is slidably connected to the slide rail; each of the hydraulic clamps is coupled and linked with the driving screw rod; A screw drive mechanism, wherein the screw drive mechanism is mounted on the platform bracket, and the power output end of the drive mechanism is in transmission cooperation with the drive screw; A hydraulic assembly is installed on the platform bracket, and an output oil circuit of the hydraulic assembly is connected to the inner cavity of the hydraulic support roller.
[0007] To further optimize the technical solution, the rotation direction of each hydraulic support roller is parallel to the axial direction of the oil and gas pipeline.
[0008] To further optimize the technical solution, the rotation direction of each hydraulic support roller and the axial direction of the oil and gas pipeline form the same angle with the axial direction of the oil and gas pipeline.
[0009] To further optimize the technical solution, the screw drive mechanism includes a reduction motor, the output shaft of the reduction motor is equipped with a turbine; the middle part of the driving screw is provided with a transmission gear coupled with the turbine transmission; the driving screw is a bidirectional screw.
[0010] To further optimize the technical solution, the hydraulic clamp also includes a rigid bracket; the rigid bracket is fixedly connected to the C-shaped bracket; the top surface of the rigid bracket is a concave arc surface that matches the side wall of the oil and gas pipeline; when the hydraulic support roller is depressurized, the oil and gas pipeline is lifted by the rigid bracket.
[0011] To further optimize the technical solution, flexible shock-absorbing pads are installed around the bottom of the support platform.
[0012] In the technical solution recorded in the present invention, after the hydraulic support wheel is stamped, the oil and gas pipeline is radially extruded and fixed. During vibration aging, the hydraulic support wheel will provide boundary conditions for the vibration of the oil and gas pipeline, suppressing the overall resonance of the oil and gas pipeline to the resonance within a local range, thereby reducing energy consumption and improving the efficiency of stress elimination; in addition, the spacing between the two hydraulic clamps can be adjusted by driving the screw rod, thereby adjusting the support position of the hydraulic support wheel, and cooperating with the vibration aging instrument to debug the optimal vibration frequency and amplitude parameters.
[0013] The technical effects of using hydraulic support wheels to restrain oil and gas pipelines are: 1. The relative air pressure bearing capacity is strong, and the hydraulic support has a good vibration absorption effect, which can reduce the vibration impact on the platform support; 2. When the rolling direction of the hydraulic support wheel is at a certain angle to the axial direction of the oil and gas pipeline, when the spacing between the hydraulic clamps is adjusted by the screw drive mechanism, the oil and gas pipeline will rotate due to the rotational driving force, which can make the oil and gas pipeline more evenly stressed during stress elimination.
[0014] Other technical effects of the present invention will be gradually clarified in the development of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure without the remaining part of the oil and gas pipeline; Figure 3 This is a schematic diagram of the structure of Example 2 of the present invention.
[0016] In the figure, 1. oil and gas pipeline; 2. hydraulic clamp; 3. C-shaped bracket; 4. hydraulic support roller; 5. platform bracket; 6. slide rail; 7. drive screw; 8. hydraulic assembly; 9. reduction motor; 10. turbine; 11. transmission gear; 12. rigid bracket; 13. flexible shock-absorbing pad; 14. welding joint; 15. hydraulic pipeline. DETAILED DESCRIPTION
[0017] Example 1: Figure 1 , Figure 2 As shown, a stress relief support system for oil and gas pipelines is provided, which is used to support the oil and gas pipelines 1 when the vibration effect stress is relieved, and includes: Hydraulic clamp 2; the hydraulic clamp 2 comprises a C-shaped bracket 3 and at least three hydraulic support rollers 4 mounted on the C-shaped bracket 3; in a stamping state, the at least three hydraulic support rollers 4 are configured to radially squeeze and fix the oil and gas pipeline 1; in a depressurized state, a release gap is formed between the space enclosed by the at least three hydraulic support rollers 4 and the oil and gas pipeline 1, and the oil and gas pipeline 1 can pass upward through the upper notch of the C-shaped bracket 3 through the release gap; Platform bracket 5; the platform bracket 5 is provided with a slide rail 6 and a drive screw 7 in the length direction of the oil and gas pipeline 1; the number of the hydraulic clamps 2 is two and each is distributed on both sides of the length direction of the platform bracket 5; each of the hydraulic clamps 2 is slidably connected to the slide rail 6; each of the hydraulic clamps 2 is coupled and linked to the drive screw 7; The screw drive mechanism is installed on the platform bracket 5, and the power output end of the drive mechanism is in transmission cooperation with the drive screw 7; The hydraulic assembly 8 is installed on the platform bracket 5 , and the output oil circuit of the hydraulic assembly 8 is connected to the inner cavity of the hydraulic support roller 4 .
[0018] If the oil and gas pipeline 1 is in a welding prefabricated workshop, the platform bracket 5 can be fixed on the ground; if the oil and gas pipeline 1 is under construction, in order to be flexible in movement, the platform bracket 5 can be installed on a flatbed truck as a mobile fixed platform.
[0019] When the oil and gas pipeline 1 is placed on the hydraulic clamp 2, the hydraulic support roller 4 should be in a state without liquid filling. After the oil and gas pipeline 1 is placed in the encirclement of the C-shaped bracket 3, the hydraulic pump of the hydraulic assembly 8 is started, and the hydraulic fluid enters all the hydraulic support rollers 4. The hydraulic support rollers 4 expand to support and radially fix the oil and gas pipeline 1. The radial direction of the oil and gas pipeline 1 is fixed, while the axial direction is in an unconstrained state, because when the vibration aging instrument vibrates the oil and gas pipeline 1, the vibration direction is radial to promote the stress release of the joint position. In addition, after the vibration aging instrument is connected to the oil and gas pipeline 1, when adjusting the parameters of the vibration frequency and amplitude, it is necessary to adjust the constraint position of the oil and gas pipeline 1 on the hydraulic clamp 2. Therefore, the axial direction of the oil and gas pipeline 1 is not constrained. In the radially fixed state, when the vibration aging instrument is started to adjust the parameters, the position of the hydraulic clamp 2 is adjusted through the screw drive structure while observing the excitation of the vibration aging instrument, and the appropriate resonance frequency and amplitude are quickly adjusted.
[0020] To further optimize the present embodiment, the rotation direction of each hydraulic support roller 4 is parallel to the axial direction of the oil and gas pipeline 1. In this case, in the stamping state, when the position of the hydraulic clamp 2 is adjusted, the hydraulic support roller 4 rotates along the axial direction of the oil and gas pipeline 1 on the side wall of the oil and gas pipeline 1, so the oil and gas pipeline 1 does not rotate. When the oil and gas pipeline 1 needs to be rotated, the pressure of the hydraulic support roller 4 can be removed, and the oil and gas pipeline 1 can be re-lifted and rotated by machinery, and then placed in the hydraulic clamp 2 again for extrusion and positioning.
[0021] like Figure 3 As shown, the difference between this embodiment and embodiment 1 is that: the rotation direction of each hydraulic support roller 4 and the axial direction of the oil and gas pipeline 1 are at the same angle with the axial direction of the oil and gas pipeline 1. In this case, in the stamping state, when the position of the hydraulic clamp 2 is adjusted, the rolling direction of the hydraulic support roller 4 on the side wall of the oil and gas pipeline 1 has a certain angle with the oil and gas pipeline 1, and the angle range can be set between 15° and 20°. When the hydraulic support roller 4 rotates, it will give the oil and gas pipeline 1 an axial rotation driving force, causing the oil and gas pipeline 1 to rotate. Such adjustment can make the oil and gas pipeline 1 more evenly stressed during stress elimination.
[0022] To further optimize this embodiment, the screw drive mechanism includes a reduction motor 9, and the output shaft of the reduction motor 9 is installed with a turbine 10; the middle part of the driving screw 7 is provided with a transmission gear 11 that is transmission-coupled with the turbine 10; the driving screw 7 is a bidirectional screw.
[0023] The worm gear transmission method generates a large torque and has a simple structure. On the other hand, the position of the hydraulic clamp 2 can be adjusted with higher precision.
[0024] To further optimize this embodiment, the hydraulic clamp 2 also includes a rigid bracket 12; the rigid bracket 12 is fixedly connected to the C-shaped bracket 3; the top surface of the rigid bracket 12 is a concave arc surface that matches the side wall of the oil and gas pipeline 1; when the hydraulic support roller 4 is in a depressurized state, the oil and gas pipeline 1 is lifted by the rigid bracket 12.
[0025] The function of the rigid bracket 12 is: when the hydraulic support roller 4 is in a depressurized state, it replaces the hydraulic support roller 4 to lift the oil and gas pipeline 1, so as to prevent the depressurized hydraulic support roller 4 from being crushed and damaged; in addition, when the oil and gas pipeline 1 is driven to rotate axially by the hydraulic support roller 4, the pressure of the hydraulic support roller 4 can be removed, and then the hydraulic clamp 2 can be reset to the optimal position and then punched again. In this process, the oil and gas pipeline 1 can be temporarily supported by the rigid bracket 12.
[0026] To further optimize this embodiment, flexible shock-absorbing pads 13 are installed around the bottom of the support platform. The flexible shock-absorbing pads 13 can reduce the vibration energy consumption transmitted from the platform support 5 to the ground, and also reduce noise.
[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0028] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
Claims
1. A stress relief support system for oil and gas pipelines, used to provide support for oil and gas pipelines when eliminating vibration-induced stress; it is characterized by: include Hydraulic clamp; the hydraulic clamp comprises a C-shaped bracket and at least three hydraulic support rollers mounted on the C-shaped bracket; in a stamping state, the at least three hydraulic support rollers are configured to radially squeeze and fix the oil and gas pipeline; in a depressurized state, a release gap is formed between the space enclosed by the at least three hydraulic support rollers and the oil and gas pipeline, and the oil and gas pipeline can pass upward through the upper notch of the C-shaped bracket through the release gap; Platform bracket; the platform bracket is provided with a slide rail and a driving screw rod in the length direction of the oil and gas pipeline; the number of the hydraulic clamps is two and each is distributed on both sides of the length direction of the platform bracket; each of the hydraulic clamps is slidably connected to the slide rail; each of the hydraulic clamps is coupled and linked with the driving screw rod; A screw drive mechanism, wherein the screw drive mechanism is mounted on the platform bracket, and the power output end of the drive mechanism is in transmission cooperation with the drive screw; A hydraulic assembly is installed on the platform bracket, and an output oil circuit of the hydraulic assembly is connected to the inner cavity of the hydraulic support roller.
2. The oil and gas pipeline stress relief support system according to claim 1, characterized in that: The rotation direction of each hydraulic support roller is parallel to the axial direction of the oil and gas pipeline.
3. The oil and gas pipeline stress relief support system according to claim 1, characterized in that: The rotation direction of each hydraulic support roller and the axial direction of the oil and gas pipeline form the same angle.
4. The oil and gas pipeline stress relief support system according to claim 1, characterized in that: The screw drive mechanism comprises a reduction motor, the output shaft of which is provided with a turbine; a transmission gear coupled to the turbine is arranged in the middle of the driving screw; and the driving screw is a bidirectional screw.
5. The oil and gas pipeline stress relief support system according to claim 3, characterized in that: The hydraulic clamp also includes a rigid bracket; the rigid bracket is fixedly connected to the C-shaped bracket; the top surface of the rigid bracket is a concave arc surface that matches the side wall of the oil and gas pipeline; when the hydraulic support roller is depressurized, the oil and gas pipeline is lifted by the rigid bracket.
6. The oil and gas pipeline stress relief support system according to claim 1, characterized in that: Flexible shock-absorbing pads are installed around the bottom of the support platform.