Ultra-high pressure pipeline structure
By combining the conventional pipeline body with the flange joint and the carbon fiber wire layer to form a pipeline unit, and connecting multiple pipeline units through welding flange joints, the problem of difficulty in the production process of ultra-high pressure pipelines is solved, and the high strength of the pipeline and the firmness of the connection are achieved.
Patent Information
- Application Number
- CN202421498885.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The production process of existing ultra-high pressure pipelines is difficult to meet the long size and high strength requirements of the pipeline at the same time, resulting in complex processes and low material utilization efficiency.
The pipe unit consisting of a conventional pipe body, a flange joint and a carbon fiber wire layer is used to connect multiple pipe units in turn by welding flange joints, and the strength of the pipe and flange connection is enhanced by using the carbon fiber wire layer.
It reduces the difficulty of the ultra-high pressure pipeline production process, improves the overall strength of the pipeline and the firmness of the connections, and avoids cracks at the pipe connections under ultra-high pressure.
Smart Images
Figure CN222702874U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ultra-high pressure pipelines, and in particular relates to an ultra-high pressure pipeline structure. Background Art
[0002] Ultra-high pressure pipelines refer to pipelines that can withstand pressures of 300MPa and above. In order to meet the pressure requirements in actual use, this type of pipeline has strict requirements on the inner diameter and wall thickness of the pipeline. For example, the inner diameter of a certain ultra-high pressure pipeline is 50mm, and the wall thickness is also 50mm.
[0003] Since the length of the ultra-high pressure pipeline to be laid in practice is long, it is difficult for existing production processes to simultaneously produce ultra-high pressure pipelines that meet the inner diameter and wall thickness requirements of the above design while also meeting the long size requirements.
[0004] In order to initially reduce the difficulty of the process, the current method is to shorten the ultra-high pressure pipeline and make it in sections; then weld flanges at both ends of each shortened ultra-high pressure pipeline, and connect each shortened ultra-high pressure pipeline in sequence through flanges to form a long ultra-high pressure pipeline. The connection between the flange and the ultra-high pressure pipeline is welded with thickening.
[0005] However, since there is no improvement in the wall thickness of the ultra-high pressure pipeline, the production of only shortened ultra-high pressure pipelines still places high demands on the process. Utility Model Content
[0006] The ultra-high pressure pipeline structure of the utility model can reduce the process difficulty of the ultra-high pressure pipeline and facilitate the carbon fiber wire to strengthen the connection between the pipeline and the flange.
[0007] In order to achieve the above-mentioned purpose, the ultra-high pressure pipeline structure of the utility model comprises a plurality of pipeline units connected in sequence, wherein the pipeline unit comprises a conventional pipeline body, which refers to an ordinary pipeline capable of withstanding non-ultra-high pressure; flange joints are respectively welded at both ends of the pipeline body; the flange joints comprise:
[0008] A raised portion; one end of the raised portion is end a, and the other end is end b; end a of the raised portion is welded to the corresponding end of the pipe body; the outer diameter of end b of the raised portion is greater than the outer diameter of end a; the outer diameter of end a of the raised portion is equal to the outer diameter of the pipe body;
[0009] The contraction portion is integrally arranged at the end b of the protrusion; the outer diameter of the contraction portion is smaller than the outer diameter of the end b of the protrusion; a step is formed at the connection between the contraction portion and the end b of the protrusion;
[0010] A flange plate; integrally arranged at one end of the contraction portion away from the protrusion portion;
[0011] The outer wall of the pipe body, the outer wall of the raised part and the outer wall of the contracted part are tightly wound with multiple layers of carbon fiber filaments, which are recorded as carbon fiber filament layers; the pipe unit can withstand ultra-high pressure after being wound with the carbon fiber filament layers;
[0012] A connecting hole for connecting two adjacent pipeline units to each other is arranged in the flange joint; the connecting hole is connected to the hole of the pipeline body, and the aperture of the connecting hole is equal to the aperture of the pipeline body.
[0013] Because the outer diameter of the contraction part is smaller than the outer diameter of the end b of the raised part, the end b of the raised part forms a fulcrum for the carbon fiber wire to exert force. After the carbon fiber wire is obliquely wound around the fulcrum, the carbon fiber wire is not easy to loosen and fall off, which helps to ensure that the flange structure and the pipeline body are bound together as a whole. When subjected to ultra-high pressure, cracks are not easy to appear at the welding point between the flange structure and the pipeline body.
[0014] Furthermore, the shape of the raised portion is a truncated cone, and the axis of the raised portion coincides with the axis of the pipe body.
[0015] The raised part is a conventional rotating body, which is conducive to reducing the difficulty of processing. Moreover, only the outer diameter of the b end of the raised part is large, and the outer diameter of the a end is small, which can save material costs. The structural strength of the raised part can be ensured by winding carbon fiber filaments on the outer wall of the a end of the raised part in the later stage.
[0016] Furthermore, the contraction portion is in the shape of a circular tube, and the outer diameter of the contraction portion is equal to the outer diameter of the pipe body; the axis of the contraction portion coincides with the axis of the pipe body.
[0017] Conventional structure, simple processing, reducing the difficulty of the manufacturing process of the entire flange structure.
[0018] Furthermore, the flange is a circular disk, and the axis of the flange coincides with the axis of the pipeline body; the outer diameter of the flange is larger than the outer diameter of the end b of the raised portion.
[0019] Conventional structure, simple processing, reducing the difficulty of the manufacturing process of the entire flange structure.
[0020] Furthermore, the edge of end b of the protrusion is rounded.
[0021] Reduce sharp parts to prevent the carbon fiber filaments from contacting with sharp edges during winding and to prevent the carbon fiber filaments from being scratched by sharp edges. Beneficial Effects
[0022] 1. This solution provides a raised portion, and the end b of the raised portion can provide a force point for the wound carbon fiber filaments to prevent the wound carbon fiber filaments from loosening and falling off.
[0023] 2. Carbon fiber filaments spirally wound around the pipe body are used to ensure that the pipe body can withstand ultra-high pressure;
[0024] 3. The carbon fiber filaments obliquely wound around the raised part and the contracted part are used to ensure that the flange joint and the pipe body are bound as a whole, avoiding the situation where the connection between the flange joint and the pipe body is weak and causes cracks when subjected to ultra-high pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 This is a schematic diagram of the structure of an ultra-high pressure pipeline when the carbon fiber filaments are not wound;
[0026] Figure 2 This is a schematic diagram of the structure of an ultra-high pressure pipeline after one-time winding of carbon fiber filaments;
[0027] Figure 3 This is a schematic diagram of the structure of the ultra-high pressure pipeline after secondary winding of carbon fiber filaments.
[0028] 1. Pipe body; 2. Flange joint; 21. Raised portion; 22. Contracted portion; 23. Flange; 3. Connecting hole; 4. Carbon fiber layer. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] Example 1: See Figure 1 , the ultra-high pressure pipeline structure includes a plurality of pipeline units; each pipeline unit is connected in sequence.
[0031] The pipeline unit includes a pipeline body 1 that can withstand conventional pressure, for example, a 100Mpa high-pressure pipeline. In this embodiment, the end face of the pipeline body 1 is a circular ring. In order to reduce the process difficulty of the pipeline body 1, the pipeline body 1 in this embodiment does not need to be able to withstand ultra-high pressure.
[0032] Flange joints 2 are welded at both ends of the pipe body 1; when viewed along the radial direction of the pipe body 1, Figure 1 From the perspective of the pipe body 1, the shape of the pipe body 1 is a rectangle; let the transverse midline of the pipe body 1 be line G, and the surface passing through line G and parallel to the end surface of the pipe body 1 be surface P; then, the two flange joints 2 are symmetrically arranged along surface P.
[0033] Flange joint 2 includes:
[0034] The raised portion 21 is provided with the two ends of the raised portion 21 along the axis direction of the pipe body 1 being end a and end b respectively; the end a of the raised portion 21 is welded to one end of the pipe body 1, and the outer diameter of the end a of the raised portion 21 is equal to that of the pipe body 1; the outer diameter of the end b of the raised portion 21 is greater than the outer diameter of the pipe body 1. In this embodiment, the shape of the raised portion 21 is a truncated cone, the end with a smaller area of the truncated cone is end a, and the end with a larger area is end b. The edge of the end b of the truncated cone-shaped raised portion 21 is chamfered. The raised portion 21 is a rotating body, and the axis of the raised portion 21 coincides with the axis of the pipe body 1.
[0035] The contraction portion 22, in this embodiment, is in the shape of a circular tube; the outer diameter of the contraction portion 22 is equal to the outer diameter of the pipe body 1. The contraction portion 22 is integrally formed at the end b of the protrusion 21, and the end b of the protrusion 21 forms a step with the contraction portion 22. The axis of the contraction portion 22 coincides with the axis of the pipe body 1.
[0036] The flange 23, in this embodiment, is a disc, and the flange 23 is integrally formed with the contraction portion 22. The flange 23 is located at the end of the contraction portion 22 away from the protrusion 21. The axis of the flange 23 coincides with the axis of the pipeline body 1. The outer diameter of the flange 23 is greater than the outer diameter of the end b of the protrusion 21. Two adjacent pipeline units are connected to each other by the flange 23.
[0037] The flange joint 2 is provided with a connecting hole 3 for connecting two adjacent pipe units to each other. The connecting hole 3 is also connected to the hole of the pipe body 1. The axis of the connecting hole 3 coincides with the axis of the pipe body 1, and the aperture of the connecting hole 3 is equal to the aperture of the pipe body 1.
[0038] See Figure 2 , spiral carbon fiber filaments are formed on the outer wall of the pipe unit. Specifically, the outer wall of the pipe body 1, the outer wall of the raised portion 21 and the outer wall of the contraction portion 22 are tightly wound with multiple layers of carbon fiber filaments, and all the wound carbon fiber filaments are recorded as carbon fiber filament layers 4. The winding method of the carbon fiber filaments on the raised portion 21 and the contraction portion 22 is oblique winding, which is used to bind the pipe body 1 and the flange joint 2 into a whole, ensuring that no cracks will appear at the welding point between the flange joint 2 and the pipe body 1 when subjected to ultra-high pressure; the winding method of the carbon fiber filaments on the outer wall of the pipe body 1 is spiral winding, which is used to ensure that the pipe body 1 can withstand ultra-high pressure.
[0039] Figure 3 The outer wall of the pipe body 1 only shows a few layers of spirally wound carbon fiber filaments, and the outer walls of the protrusion 21 and the contraction 22 are only obliquely wound with one carbon fiber filament, and the carbon fiber filaments do not completely wrap the protrusion 21 and the contraction 22. In actual situations, because the carbon fiber filaments are very thin, the carbon fiber filaments will completely wrap the protrusion 21 and the contraction 22 during the continuous oblique winding process, and the outer wall of the pipe body 1 has more than two layers of carbon fiber filaments. Figure 3 The diagram is for schematic purposes only.
[0040] Because the diameter of the carbon fiber filaments is small and much smaller than the outer diameter of the pipe body 1 , the requirement that the carbon fiber filaments are completely wound around and wrapped around the protrusion 21 , the contraction portion 22 and the outer wall of the pipe body 1 can be met.
[0041] In this solution, because the outer diameter of the b-end of the raised portion 21 is larger than the outer diameter of the contraction portion 22, the carbon fiber filaments can be obliquely wound with the b-end of the raised portion 21 as the fulcrum. By obliquely winding the carbon fiber filaments around the raised portion 21 and the contraction portion 22, the flange joint 2 can be firmly bound to the pipe body 1, and the welding position between the flange joint 2 and the pipe body 1 can withstand ultra-high pressure, thereby avoiding cracks at the ultra-high pressure welding position.
[0042] Embodiment 2: A method for producing an ultrahigh pressure pipeline, comprising the following steps:
[0043] S1: Make pipeline unit;
[0044] S2: spirally wind the carbon fiber filaments on the outer wall of the pipe body 1 and the raised portion 21 until the outer diameter of the carbon fiber filaments on the outer wall of the pipe body 1 and the raised portion 21 is equal to the maximum outer diameter of the raised portion 21. At this time, the carbon fiber filaments are wound once. Figure 2 , the carbon fiber filaments wound once are used to ensure that the pipeline body can withstand ultra-high pressure;
[0045] S3: See Figure 3 , observe radially the pipe body 1, take the axis of the pipe body 1 as a reference, set the left side of the axis of the pipe body 1 as the left side of the viewing angle, the right side of the axis of the pipe body 1 as the right side of the viewing angle, the upper end of the pipe body 1 as the upper side of the viewing angle, and the lower end of the pipe body 1 as the lower side of the viewing angle; the left, right, top and bottom of the viewing angle do not rotate with the rotation of the pipe body 1 around its axis; the rear side of the pipe body 1 is the rear side of the viewing angle, and the front side of the pipe body 1 is the front side of the viewing angle.
[0046] Then, the end of one winding is at the upper right side, which is recorded as point A, and the left side of the end b of the protrusion 21 close to the end is set as point B, and the right side of the end b of the protrusion 21 at the other end is set as point B';
[0047] The end of the first winding goes around the rear side of the pipe body 1, passes through point B, then goes around the front side of the pipe body, passes through point B', and then goes around the rear side of the pipe body 1 again, and so on, and is continuously wound. Moreover, during the winding process of the end of the first winding, it is necessary to ensure that the end of the first winding is wound while the pipe body 1 rotates around its axis.
[0048] The carbon fiber filaments are wound twice until the raised portion 21 and the contracted portion 22 are completely wrapped around the carbon fiber filaments. The secondary winding binds the flange joint 2 and the pipe body 1 into a whole, so as to ensure the firmness and strength of the connection between the flange joint 2 and the pipe body 1, and avoid cracks when the connection between the flange joint 2 and the pipe body 1 is subjected to ultra-high pressure. The carbon fiber filaments wound once and twice are the carbon fiber layer.
[0049] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. Ultra-high pressure pipeline structure, characterized in that: The invention comprises a plurality of pipeline units connected in sequence, wherein the pipeline unit comprises a conventional pipeline body (1), wherein the conventional pipeline body (1) refers to an ordinary pipeline capable of withstanding non-ultra-high pressure; flange joints (2) are respectively welded at both ends of the pipeline body (1); the flange joints (2) comprise: A raised portion (21); one end of the raised portion (21) is end a and the other end is end b; end a of the raised portion (21) is welded to an end corresponding to the pipe body (1); the outer diameter of end b of the raised portion (21) is greater than the outer diameter of end a; the outer diameter of end a of the raised portion (21) is equal to the outer diameter of the pipe body (1); The contraction portion (22) is integrally arranged at the end b of the protrusion (21); the outer diameter of the contraction portion (22) is smaller than the outer diameter of the end b of the protrusion (21), and a step is formed at the connection between the contraction portion (22) and the end b of the protrusion (21); A flange (23) is integrally arranged at one end of the contraction portion (22) away from the protrusion (21); The outer wall of the pipe body (1), the raised portion (21) and the outer wall of the contracted portion (22) are all tightly wound with multiple layers of carbon fiber filaments, which are referred to as carbon fiber filament layers (4); after the pipe unit is wound with the carbon fiber filament layers (4), it can withstand ultra-high pressure; A connecting hole (3) for connecting two adjacent pipeline units to each other is provided in the flange joint (2); the connecting hole (3) is connected to a hole in the pipeline body (1); and the hole diameter of the connecting hole (3) is equal to the hole diameter of the pipeline body (1).
2. The ultra-high pressure pipeline structure according to claim 1, characterized in that: The shape of the raised portion (21) is a truncated cone, and the axis of the raised portion (21) coincides with the axis of the pipe body (1).
3. The ultra-high pressure pipeline structure according to claim 2, characterized in that: The contraction portion (22) is in the shape of a circular tube, and the outer diameter of the contraction portion (22) is equal to the outer diameter of the pipeline body (1); the axis of the contraction portion (22) coincides with the axis of the pipeline body (1).
4. The ultra-high pressure pipeline structure according to claim 3, characterized in that: The flange (23) is a circular disk, and the axis of the flange (23) coincides with the axis of the pipeline body (1); the outer diameter of the flange (23) is greater than the outer diameter of the end b of the protruding portion (21).
5. The ultra-high pressure pipeline structure according to claim 4, characterized in that: The edge of the end b of the protruding portion (21) is rounded.