A low stress self-constrained structure for a long pipeline

Abstract

The utility model relates to the technical field of long pipeline constraint, specifically disclose a long pipeline low stress self -restraint structure, including pipeline, set up in the both sides of pipeline seamless steel pipe and set up in pipeline several groups of expansion joint, both sides of expansion joint at both ends are provided with end lug, end lug and pipeline fixed connection, the connecting assembly for fixing end lug is provided on the seamless steel pipe, connecting assembly includes stud bolt and through -hole, the utility model discloses through setting up seamless steel pipe, expansion joint, end lug, stud bolt, connecting assembly and restraint assembly, connecting assembly can be connected and fixed to stud bolt and end lug, can reduce pipeline stress, reduce space, promote torsional strength, reduce displacement resistance, improve installation efficiency, strengthen the anti -vibration ability, the setting of restraint assembly and expansion joint can facilitate pipeline to adapt to the environment of big displacement and complex stress.

Description

Technical Field

[0001] This utility model relates to the field of long pipeline constraint technology, specifically a low-stress self-constraining structure for long pipelines. Background Technology

[0002] In many petrochemical processes, the complex operating conditions of massive piping systems and high temperatures and pressures present numerous severe challenges to pipeline systems. Large expansion, excessive pressure thrust, equipment settlement, and pipeline vibration are all factors that cannot be ignored. For example, in long-distance piping systems, traditional support arrangements in high-temperature and high-pressure environments will be subjected to very high thermal stress and pressure thrust, which will greatly affect the stability and safety of the pipeline system.

[0003] In densely populated areas, space resources are extremely limited, making it impossible to install pipe supports and large expansion joints to meet the needs of pipe thermal expansion compensation. Although conventional pipe support installations take into account the thermal expansion and load issues of pipes to a certain extent, they are prone to problems such as displacement and torsion leading to pipe deformation when facing large displacement and complex stress environments. To address these issues, a low-stress self-restrained structure for long pipelines is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a low-stress self-constraining structure for long pipelines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A low-stress self-constraining structure for a long pipeline includes a pipeline, seamless steel pipes arranged on both sides of the pipeline, and several sets of expansion joints arranged on the pipeline. End lugs are provided on both sides of the expansion joints at both ends. The end lugs are fixedly connected to the pipeline. Connecting components for fixing the end lugs are provided on the seamless steel pipes.

[0007] The connecting assembly includes a double-ended stud and a through hole. The double-ended stud is threaded to one side of the seamless steel pipe. The through hole is opened on the end lug plate and is sleeved on the double-ended stud. A set of thin nuts, spherical nuts, and conical washers are sequentially arranged on one side of the through hole. The thin nuts and spherical nuts are threaded to the double-ended stud, and the conical washers are sleeved on the double-ended stud. The double-ended stud is provided with an anti-torsion component for limiting the pipe.

[0008] The two sets of end ear plates are provided with constraint components, and the seamless steel pipe is provided with several sets of arc plates, and the arc plates are provided with fixing components for limiting the seamless steel pipe.

[0009] In one alternative embodiment: the anti-torsion component includes a load-bearing lug and a fixing plate. The load-bearing lug is sleeved on a double-ended stud, and the fixing plate is fixedly connected to one side of the load-bearing lug. One side of the load-bearing lug overlaps with one side of the end lug with a set of anti-torsion plates. The anti-torsion plates are connected to the fixing plate via pins. One side of the load-bearing lug overlaps with a set of conical washers. On the side of the load-bearing lug away from the set of conical washers, another set of conical washers, a spherical nut, and a thin nut are sequentially arranged. The other set of spherical nuts and thin nuts are threadedly connected to the double-ended stud, and the other set of conical washers is sleeved on the double-ended stud.

[0010] In one alternative embodiment: the constraint assembly includes an L-shaped frame and a limiting plate, two sets of the L-shaped frames are respectively fixedly connected to the two sets of end ears on opposite sides, the two sets of limiting plates are respectively disposed at the top and bottom of the two sets of L-shaped frames, and the two sets of L-shaped frames are rotatably connected between the two sets of limiting plates.

[0011] In one alternative: the fixing assembly includes a displacement sleeve and a guide rod, two sets of the displacement sleeves are disposed inside the arc plate, the guide rod is rotatably connected to one side of the displacement sleeve, and the guide rod is threadedly connected to the arc plate.

[0012] In one alternative: the bottom of the arc plate is bolted to the ground.

[0013] In one alternative: a rubber pad is provided on the side of the displacement sleeve closest to the seamless steel pipe.

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

[0015] This utility model incorporates a seamless steel pipe, expansion joint, end lugs, double-ended studs, connecting components, and constraint components. The connecting components can connect and fix the double-ended studs and end lugs, which can reduce pipe stress, reduce space, improve torsional strength, reduce displacement resistance, improve installation efficiency, and enhance vibration resistance. The constraint components and expansion joints facilitate the pipe's adaptation to environments with large displacement and complex stress. Attached Figure Description

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

[0017] Figure 2 This is a structural schematic diagram of the location of the load-bearing lug in this utility model.

[0018] Figure 3 This is a schematic diagram of the structure where the double-headed stud is located in this utility model.

[0019] Figure 4 This is a schematic diagram of the structure where the arc plate is located in this utility model.

[0020] In the diagram: 11. Seamless steel pipe; 12. Pipeline; 13. Expansion joint; 14. End lug; 15. Double-ended stud; 16. Through hole; 17. Pin; 18. Fixing plate; 19. Torsion plate; 20. Load-bearing lug; 21. Conical washer; 22. Spherical nut; 23. Thin nut; 24. L-shaped bracket; 25. Limiting plate; 26. Arc plate; 27. Displacement sleeve; 28. Guide rod. Detailed Implementation

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] 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.

[0023] Please see Figures 1-4 In this embodiment, a low-stress self-constraining structure for a long pipeline includes a pipe 12, seamless steel pipes 11 disposed on both sides of the pipe 12, and several sets of expansion joints 13 disposed on the pipe 12. End lugs 14 are provided on both sides of the expansion joints 13 at both ends. The end lugs 14 are fixedly connected to the pipe 12. The seamless steel pipes 11 are provided with connecting components for fixing the end lugs 14.

[0024] The connecting assembly includes a double-ended stud 15 and a through hole 16. The double-ended stud 15 is threaded to one side of the seamless steel pipe 11. The through hole 16 is opened on the end ear plate 14 and is fitted onto the double-ended stud 15. A set of thin nuts 23, spherical nuts 22, and conical washers 21 are sequentially arranged on one side of the through hole 16. The thin nuts 23 and spherical nuts 22 are threaded to the double-ended stud 15, and the conical washers 21 are fitted onto the double-ended stud 15. The double-ended stud 15 is provided with anti-torsion components for limiting the pipe 12. The double-ended stud 15 passes through the through hole 16 and is screwed onto one side of the seamless steel pipe 11. Then, a set of conical washers 21, spherical nuts 22, and thin nuts 23 are sequentially screwed onto the double-ended stud 15 to fix the end ear plate 14, which can effectively withstand torsional force and reduce secondary stress.

[0025] The two sets of end ear plates 14 are provided with constraint components, and the seamless steel pipe 11 is provided with several sets of arc plates 26, and the arc plates 26 are provided with fixing components for limiting the seamless steel pipe 11.

[0026] The anti-torsion component includes a load-bearing lug 20 and a fixing plate 18. The load-bearing lug 20 is sleeved on a double-ended stud 15. The fixing plate 18 is fixedly connected to one side of the load-bearing lug 20. One side of the load-bearing lug 20 overlaps with one side of the end lug 14 with a set of anti-torsion plates 19. The anti-torsion plates 19 are connected to the fixing plate 18 via pins 17. One side of the load-bearing lug 20 overlaps with a set of conical washers 21. On the side of the load-bearing lug 20 away from the set of conical washers 21, another set of conical washers 21, spherical nuts 22, and thin nuts 23 are sequentially arranged. The face nut 22 and thin nut 23 are threadedly connected to the double-ended stud 15. Another set of conical washers 21 are fitted onto the double-ended stud 15. The load-bearing ear plate 20 is fitted onto the double-ended stud 15, located on one side of the set of conical washers 21. Then, another set of conical washers 21, spherical nuts 22, and thin nuts 23 are screwed onto the double-ended stud 15 to fix the load-bearing ear plate 20. The anti-torsion plate 19 is inserted between the end ear plate 14 and the load-bearing ear plate 20. Then, the pin 17 is used to connect the anti-torsion plate 19 and the fixing plate 18. This can withstand torsional force when reducing secondary stress and reduce additional torque.

[0027] The constraint assembly includes an L-shaped frame 24 and a limiting plate 25. The two sets of L-shaped frames 24 are fixedly connected to the two sets of end ear plates 14 on opposite sides. The two sets of limiting plates 25 are respectively set at the top and bottom of the two sets of L-shaped frames 24. The two sets of L-shaped frames 24 are rotatably connected between the two sets of limiting plates 25. When the pipe 12 bends, the radial displacement of the pipe 12 can be restricted and the structural stability can be maintained.

[0028] The fixing assembly includes a displacement sleeve 27 and a guide rod 28. Two sets of displacement sleeves 27 are arranged inside the arc plate 26. The guide rod 28 is rotatably connected to one side of the displacement sleeve 27 and threadedly connected to the arc plate 26. The seamless steel pipe 11 is passed through several sets of arc plates 26. The distance between the two sets of arc plates 26 is adjusted according to the requirements. Bolts are used to install the arc plate 26 and the external lug on the pipe. Then, the guide rod 28 is rotated to move the displacement sleeve 27 close to the seamless steel pipe 11 and clamp it, which can achieve reliable positioning of the seamless steel pipe 11.

[0029] The bottom of the arc plate 26 is connected to the ground by bolts for easy fixation.

[0030] A rubber pad is provided on the side of the displacement sleeve 27 near the seamless steel pipe 11. By providing the rubber pad, the friction with the seamless steel pipe 11 can be increased, the clamping effect can be improved, and damage to the surface of the seamless steel pipe 11 can be avoided.

[0031] The working principle of this utility model is as follows: During installation, the seamless steel pipe 11 is first passed through several sets of arc plates 26. Then, the distance between two sets of arc plates 26 is adjusted according to requirements. Bolts are used to install the arc plates 26 and the external ear plates on the pipe. After that, the guide rod 28 is rotated to move the displacement sleeve 27 close to the seamless steel pipe 11 and clamp it. The double-ended stud 15 passes through the through hole 16 and is screwed onto one side of the seamless steel pipe 11. Then, a set of conical washers 21, spherical nuts 22, and thin nuts 23 are screwed onto the double-ended stud 15 in sequence to fix the end ear plates 14 and prevent the pipe 12 from bearing too much internal pressure. To apply the thrust, the load-bearing ear plate 20 is fitted onto the double-ended stud 15, located on one side of a set of conical washers 21. Then, another set of conical washers 21, spherical nuts 22, and thin nuts 23 are screwed onto the double-ended stud 15 to fix the load-bearing ear plate 20. The anti-torsion plate 19 is inserted between the end ear plate 14 and the load-bearing ear plate 20. Then, the pin 17 is used to connect the anti-torsion plate 19 and the fixing plate 18. This structure can withstand torsional force while reducing secondary stress. The expansion joint 13 facilitates the adjustment of displacement. The entire structure can reduce pipeline stress, increase torsional strength, reduce displacement resistance, and enhance vibration resistance.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A low-stress self-restrained structure for long pipelines, comprising a pipe (12), seamless steel pipes (11) arranged on both sides of the pipe (12) and several groups of expansion joints (13) arranged on the pipe (12), characterized in that: Both sides of the expansion joints (13) at both ends are provided with end ear plates (14), the end ear plates (14) are fixedly connected to the pipe (12), and the seamless steel pipe (11) is provided with a connecting component for fixing the end ear plates (14); The connecting assembly includes a double-ended stud (15) and a through hole (16). The double-ended stud (15) is threaded to one side of the seamless steel pipe (11). The through hole (16) is opened on the end ear plate (14). The through hole (16) is sleeved on the double-ended stud (15). A set of thin nuts (23), spherical nuts (22) and conical washers (21) are arranged in sequence on one side of the through hole (16). The thin nuts (23) and spherical nuts (22) are threaded to the double-ended stud (15). The conical washers (21) are sleeved on the double-ended stud (15). The double-ended stud (15) is provided with anti-torsion components for limiting the pipe (12). The two sets of end ear plates (14) are provided with constraint components, and the seamless steel pipe (11) is provided with several sets of arc plates (26), and the arc plates (26) are provided with fixing components for limiting the seamless steel pipe (11).

2. A low stress self-constrained structure for a long pipeline according to claim 1, characterized in that: The anti-torsion component includes a load-bearing lug (20) and a fixing plate (18). The load-bearing lug (20) is sleeved on a double-ended stud (15). The fixing plate (18) is fixedly connected to one side of the load-bearing lug (20). One side of the load-bearing lug (20) overlaps with one side of the end lug (14) with an anti-torsion plate (19). The anti-torsion plate (19) is connected to the fixing plate (18) through a pin (17). One side of the load-bearing lug (20) overlaps with a set of conical washers (21). On the side of the load-bearing lug (20) away from the set of conical washers (21), another set of conical washers (21), a spherical nut (22), and a thin nut (23) are sequentially provided. The other set of spherical nuts (22) and thin nuts (23) are threadedly connected to the double-ended stud (15). The other set of conical washers (21) is sleeved on the double-ended stud (15).

3. A low stress self-constrained structure for long pipelines according to claim 1, characterized in that: The constraint assembly includes an L-shaped frame (24) and a limiting plate (25). The two sets of L-shaped frames (24) are fixedly connected to the two sets of end ear plates (14) on opposite sides. The two sets of limiting plates (25) are respectively set at the top and bottom of the two sets of L-shaped frames (24). The two sets of L-shaped frames (24) are rotatably connected between the two sets of limiting plates (25).

4. A low stress self-constrained structure for long pipelines according to claim 1, characterized in that: The fixing assembly includes a displacement sleeve (27) and a guide rod (28). Two sets of displacement sleeves (27) are arranged inside the arc plate (26). The guide rod (28) is rotatably connected to one side of the displacement sleeve (27) and threadedly connected to the arc plate (26).

5. A low stress self-constrained structure for a long pipeline according to claim 4, characterized in that: The bottom of the arc plate (26) is connected to the ground by bolts.

6. A low stress self-constrained structure for a long pipeline according to claim 4, characterized in that: A rubber pad is provided on the side of the displacement sleeve (27) near the seamless steel pipe (11).

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