Multifunctional composite spiral steel pipe

Abstract

This utility model discloses a multifunctional composite spiral steel pipe, belonging to the field of spiral steel pipe technology. It aims to solve the problems of existing spiral steel pipes having a simple structure, lacking insulation, and being limited in use in cold regions, thus requiring improvement in overall practicality. The key technical points include a spiral steel pipe body, with a first retaining ring welded to each end of the body. A stainless steel inner cylinder is installed inside the body, with both ends of the inner cylinder welded to the first retaining rings at both ends of the body. The interlayer between the stainless steel inner cylinder and the body can be filled with insulating rock wool. The inner diameter of the inner cylinder is the same as the inner diameter of the first retaining rings. This achieves the effects of enabling insulation operation, effectively handling fluid transportation in cold regions, effectively eliminating pipeline stress, high structural strength, and strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of spiral steel pipe technology, and in particular to multifunctional composite spiral steel pipe. Background Technology

[0002] Spiral welded steel pipe is made from low-carbon structural steel or low-alloy structural steel strip as raw material, formed by continuous spiral forming, and then welded using double-sided submerged arc welding. It has a wide range of diameters and its length can be customized according to requirements, making it a commonly used tubular profile in the industrial field.

[0003] In terms of applications, it is primarily used for fluid transportation, such as long-distance oil and gas pipelines, urban water supply and drainage networks, and sewage treatment pipes; it is also suitable for structural support scenarios, such as steel structure factory columns, bridge supports, and offshore platform frames. It can also be used as process pipelines in the chemical and power industries to carry corrosive or high-temperature media.

[0004] The existing spiral steel pipe has a simple structure and lacks insulation, which limits its use in cold regions and its overall practicality needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide a multifunctional composite spiral steel pipe that can perform heat preservation operations, effectively cope with the transportation of fluids in cold regions, effectively eliminate pipeline stress, has high structural strength, and is highly practical.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multifunctional composite spiral steel pipe includes a spiral steel pipe body, with a first retaining ring welded to each end of the spiral steel pipe body. A stainless steel inner cylinder is installed inside the spiral steel pipe body, with each end of the stainless steel inner cylinder welded to the first retaining rings at both ends of the spiral steel pipe body. The interlayer between the stainless steel inner cylinder and the spiral steel pipe body can be filled with thermal insulation rock wool.

[0008] By adopting the above technical solutions, the spiral steel pipe has an internal insulation structure, which can effectively improve the spiral steel pipe's ability to cope with cold environments.

[0009] Furthermore, the inner diameter of the stainless steel inner cylinder is the same as the inner diameter of the first retaining ring, and the stainless steel inner cylinder and the first retaining ring share a common central axis.

[0010] By adopting the above technical solutions, the structural connection of the stainless steel inner cylinder and its positional stability are ensured.

[0011] Furthermore, a corrugated pipe section is installed between two adjacent spiral steel pipe bodies.

[0012] By adopting the above technical solutions, the functionality of the entire spiral steel pipe has been effectively improved.

[0013] Furthermore, the corrugated pipe section includes an outer corrugated pipe, an inner corrugated pipe, and two second retaining rings. The outer corrugated pipe is sleeved on the outside of the inner corrugated pipe. The outer corrugated pipe and the inner corrugated pipe share a common central axis. The two second retaining rings are respectively welded to the two ends of the outer corrugated pipe and the inner corrugated pipe.

[0014] By adopting the above technical solutions, the structural strength and stress relief performance of the corrugated pipe section are ensured.

[0015] Furthermore, the space between the outer corrugated pipe and the inner corrugated pipe is filled with insulating gas.

[0016] By adopting the above technical solutions, the thermal insulation performance of the corrugated pipe section was ensured.

[0017] Furthermore, multiple reinforcing strips are welded to the outer surface of the spiral steel pipe body, and the two ends of the reinforcing strips are respectively welded to the first retaining ring, and the spacing of the multiple reinforcing strips is consistent.

[0018] By adopting the above technical solutions, the structural strength of the entire spiral steel pipe can be effectively improved.

[0019] In summary, the beneficial technical effects of this utility model are as follows:

[0020] 1. This utility model provides a thermal insulation layer by incorporating thermal insulation rock wool inside the spiral steel pipe body, which effectively improves the performance of the spiral steel pipe in coping with severe cold climates. At the same time, the stainless steel inner cylinder inside the spiral steel pipe body effectively improves the corrosion resistance of the entire spiral steel pipe, thus improving the service life of the entire spiral steel pipe and the stability of material transportation, thereby significantly enhancing its practicality.

[0021] 2. By setting corrugated pipe sections, this utility model enables the spiral steel pipe to have a pipeline stress adjustment structure and function, which effectively improves the self-adjustment performance of the spiral steel pipe in the face of thermal expansion and contraction. At the same time, it can protect the connection of the entire pipeline, and the structural connection stability and overall functionality are effectively improved.

[0022] 3. This utility model effectively improves the structural strength of the entire spiral steel pipe by welding multiple reinforcing strips with consistent spacing to the outer surface of the spiral steel pipe body, and avoids dents caused by impacts from external objects during the laying process. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a diagram of the internal structure of the present invention;

[0025] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0026] Figure 4 This utility model Figure 2 Enlarged view of point B.

[0027] In the diagram: 1. Spiral steel pipe body; 2. First retaining ring; 3. Stainless steel inner cylinder; 4. Reinforcing strip; 5. Corrugated pipe section; 6. Outer corrugated pipe; 7. Inner corrugated pipe; 8. Thermal insulation rock wool; 9. Second retaining ring. Detailed Implementation

[0028] The method of this utility model will be further described in detail below with reference to the accompanying drawings.

[0029] Reference Figure 1 , Figure 2 , Figure 3 A multifunctional composite spiral steel pipe includes a spiral steel pipe body 1, with a first retaining ring 2 welded to each end of the spiral steel pipe body 1. A stainless steel inner cylinder 3 is installed inside the spiral steel pipe body 1, with both ends of the stainless steel inner cylinder 3 welded to the first retaining rings 2 at both ends of the spiral steel pipe body 1. The interlayer between the stainless steel inner cylinder 3 and the spiral steel pipe body 1 can be filled with insulating rock wool 8. The inner diameter of the stainless steel inner cylinder 3 is the same as the inner diameter of the first retaining ring 2, and the stainless steel inner cylinder 3 and the first retaining ring 2 share a central axis. By setting insulating rock wool 8 inside the spiral steel pipe body 1, the spiral steel pipe can have an insulation layer, which can effectively improve the performance of the spiral steel pipe in the face of severe cold climates. At the same time, setting the stainless steel inner cylinder 3 inside the spiral steel pipe body 1 can effectively improve the corrosion resistance of the entire spiral steel pipe, effectively improve the service life of the entire spiral steel pipe, and improve the stability of material transportation, thus effectively enhancing its practicality.

[0030] Reference Figure 1 , Figure 2 , Figure 4A corrugated pipe section 5 is installed between two adjacent spiral steel pipe bodies 1. The corrugated pipe section 5 includes an outer corrugated pipe 6, an inner corrugated pipe 7, and two second retaining rings 9. The outer corrugated pipe 6 is sleeved on the outside of the inner corrugated pipe 7. The outer corrugated pipe 6 and the inner corrugated pipe 7 share a common central axis. The two second retaining rings 9 are welded to the two ends of the outer corrugated pipe 6 and the inner corrugated pipe 7, respectively. The space between the outer corrugated pipe 6 and the inner corrugated pipe 7 is filled with heat-insulating gas. By setting the corrugated pipe section 5, the spiral steel pipe can have a pipeline stress adjustment structure and function, which effectively improves the self-adjusting performance of the spiral steel pipe in the face of thermal expansion and contraction. At the same time, it can protect the connection of the entire pipeline. The structural connection stability and overall functionality are effectively improved.

[0031] Reference Figure 1 Multiple reinforcing strips 4 are welded to the outer surface of the spiral steel pipe body 1. The two ends of the reinforcing strips 4 are welded to the first retaining ring 2 respectively, and the spacing of the multiple reinforcing strips 4 is consistent. By welding multiple reinforcing strips 4 with consistent spacing to the outer surface of the spiral steel pipe body 1, the structural strength of the entire spiral steel pipe can be effectively improved, and the dents caused by the impact of external objects during the laying process can be avoided.

[0032] Working Principle: During use, multiple spiral steel pipes are first connected end-to-end to lay the entire conveying pipeline. During the laying process, multiple uniformly spaced reinforcing strips 4 are welded to the outer surface of the spiral steel pipe body 1, effectively improving the structural strength of the entire spiral steel pipe and preventing dents caused by impacts during laying. Once laid, it can be used normally. During use, by installing insulating rock wool 8 inside the spiral steel pipe body 1, the spiral steel pipe has an insulation layer, effectively improving its performance in cold climates. Simultaneously, a stainless steel inner cylinder 3 inside the spiral steel pipe body 1 effectively improves the corrosion resistance of the entire spiral steel pipe, extending its service life and improving the stability of material transportation. During the entire pipeline operation, the corrugated pipe section 5 provides a pipeline stress adjustment structure and function, effectively improving the self-adjusting performance of the spiral steel pipe in the face of thermal expansion and contraction. It also protects the connections of the entire pipeline, effectively improving the structural connection stability and overall functionality.

[0033] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multifunctional composite spiral steel pipe, comprising a spiral steel pipe body (1), characterized in that: A first retaining ring (2) is welded to each end of the spiral steel pipe body (1). A stainless steel inner cylinder (3) is installed inside the spiral steel pipe body (1). The two ends of the stainless steel inner cylinder (3) are welded to the first retaining rings (2) at both ends of the spiral steel pipe body (1). The interlayer between the stainless steel inner cylinder (3) and the spiral steel pipe body (1) can be filled with thermal insulation rock wool (8).

2. The multifunctional composite spiral steel pipe according to claim 1, characterized in that: The inner diameter of the stainless steel inner cylinder (3) is the same as that of the first retaining ring (2), and the stainless steel inner cylinder (3) and the first retaining ring (2) share the same central axis.

3. The multifunctional composite spiral steel pipe according to claim 1, characterized in that: A corrugated pipe section (5) is installed between two adjacent spiral steel pipe bodies (1).

4. The multifunctional composite spiral steel pipe according to claim 3, characterized in that: The corrugated pipe section (5) includes an outer corrugated pipe (6), an inner corrugated pipe (7), and two second retaining rings (9). The outer corrugated pipe (6) is sleeved on the outside of the inner corrugated pipe (7). The outer corrugated pipe (6) and the inner corrugated pipe (7) share the same central axis. The two second retaining rings (9) are respectively welded to the two ends of the outer corrugated pipe (6) and the inner corrugated pipe (7).

5. The multifunctional composite spiral steel pipe according to claim 4, characterized in that: The interlayer space between the outer corrugated pipe (6) and the inner corrugated pipe (7) is filled with heat-insulating gas.

6. The multifunctional composite spiral steel pipe according to claim 1, characterized in that: Multiple reinforcing strips (4) are welded to the outer surface of the spiral steel pipe body (1). The two ends of the reinforcing strips (4) are welded to the first retaining ring (2) respectively, and the spacing of the multiple reinforcing strips (4) is consistent.

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