Plastic-coated composite steel pipe with welding end

Abstract

The utility model discloses a plastic-coated composite steel pipe with a welding end, relates to the technical field of plastic-coated composite steel pipes, and solves the technical problems that the durability of the steel pipe in a complex environment is influenced and the expected service life of the steel pipe is shortened due to the relatively weak sealing, protection and noise reduction performance of the conventional plastic-coated composite steel pipe. Comprising a pipe body and welding ends arranged at the two ends of the pipe body. Wherein the pipe body is divided into a steel pipe layer and a polyethylene layer wrapping the steel pipe layer, and each welding end is sleeved with a rubber sealing sleeve; the outer layer comprises a metal reinforcing sheet layer, a noise reduction layer and polyurethane foam filled between the steel pipe layer and the polyethylene layer; wherein the noise reduction layer is wrapped outside the polyethylene layer; according to the coated composite steel pipe, the durability of the coated composite steel pipe under complex environmental conditions is remarkably improved, and the expected service life of the coated composite steel pipe is further prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic-coated composite steel pipes, in particular to a plastic-coated composite steel pipe with a welding end. Background Art

[0002] In modern industry and civil construction, piping systems serve as the fundamental infrastructure for fluid transmission. Their performance and durability are directly related to the overall system's operational efficiency and safety. Q355C spiral penstock, a high-strength, low-alloy structural steel, is widely used in water supply, drainage, oil and gas transportation, and other fields due to its excellent mechanical properties and processing characteristics.

[0003] With the continuous advancement of engineering technology and increasing environmental protection requirements, traditional Q355C spiral penstocks are gradually exposing some problems in complex and changing operating environments. While existing plastic-coated composite steel pipes offer certain performance advantages and can meet the requirements of fire water supply systems and water supply and drainage, their relatively weak sealing, protection, and noise reduction properties affect their durability in complex environments, thereby shortening their expected service life.

[0004] Therefore, based on the above problems, we designed a plastic-coated composite steel pipe with welded ends. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a plastic-coated composite steel pipe with welded ends. This plastic-coated composite steel pipe with welded ends solves the technical problem that existing plastic-coated composite steel pipes have relatively weak sealing, protection, and noise reduction properties, which affect the durability of the steel pipe in complex environments and thus shorten its expected service life.

[0006] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the present invention, a plastic-coated composite steel pipe with welding ends is provided, comprising a pipe body and welding ends provided at both ends of the pipe body;

[0007] The pipe body is divided into a steel pipe layer and a polyethylene layer wrapped around the steel pipe layer, and each welding end is covered with a rubber sealing sleeve;

[0008] The outer layer includes a metal reinforcement layer, a noise reduction layer, and polyurethane foam filled between the steel pipe layer and the polyethylene layer;

[0009] The noise reduction layer is wrapped around the outside of the polyethylene layer, and the metal reinforcement sheet layer is wrapped around the outside of the noise reduction layer.

[0010] A further improvement is that the rubber sealing sleeve is divided into a convex outer section and an inner section, and a gap exists between the convex outer section and the inner section.

[0011] A further improvement is that the outer wall surface of the inner section is provided with an external thread, and the inner wall surface of the port of each welding end is provided with an internal thread.

[0012] A further improvement is that the noise reduction layer is filled with a sound-absorbing material, and the sound-absorbing material is polyester fiber cotton.

[0013] A further improvement is that a layer of sound insulation paint is additionally coated on the inner and outer walls of the noise reduction layer.

[0014] A further improvement is that a buffer layer is additionally provided between the polyurethane foam and the steel pipe layer, and the buffer layer is filled with butyl rubber.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model has a convex outer section of each rubber sealing sleeve which is sleeved on the outer wall of each welding end, so that the side of the convex outer section is attached to the side of the welding end, and the inner section is screwed on the inner wall of each welding end. This can enhance the sealing effect during fluid transportation and effectively prevent leakage problems.

[0017] This utility model incorporates a multifunctional outer layer on the exterior of the pipe body, integrating the dual functions of noise reduction and thermal insulation. The noise reduction layer utilizes highly efficient sound-absorbing materials to effectively absorb noise generated during water supply or drainage operations, significantly reducing environmental noise pollution. Furthermore, the thermal insulation layer is designed to take into account the climatic conditions of different regions, ensuring stable operation of the water supply or drainage system in a variety of environments and meeting diverse application needs.

[0018] In addition, a buffer layer is placed between the insulation layer and the steel pipe layer to prevent damage to the coated composite steel pipe caused by excessive water supply / drainage pressure. Metal reinforcement sheets are also embedded in the outer layer. This design greatly enhances the overall structural strength of the coated composite steel pipe and significantly reduces the risk of pipe bending or damage due to unexpected factors. This coated composite steel pipe not only significantly improves its durability in complex environmental conditions, but also further extends its expected service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the rubber sealing sleeve and the welding end of the utility model;

[0021] Figure 3This is a schematic diagram of the cross-sectional structure of the outer layer and the tube body of the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the noise reduction layer and sound insulation coating of the utility model.

[0023] Markings in the figure:

[0024] 1. Welding end; 11. Rubber sealing sleeve; 101. Convex outer section; 102. Inner section; 2. Pipe body; 21. Steel pipe layer; 22. Polyethylene layer; 3. Outer layer; 31. Metal reinforcement sheet layer; 32. Noise reduction layer; 321. Sound insulation coating; 33. Polyurethane foam; 34. Buffer layer. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1 and Figure 2 As shown, a plastic-coated composite steel pipe with welding ends comprises a pipe body 2 and welding ends 1 provided at both ends of the pipe body 2;

[0027] The pipe body 2 is divided into a steel pipe layer 21 and a polyethylene layer 22 wrapped around the steel pipe layer 21. Each welding end 1 is provided with a rubber sealing sleeve 11.

[0028] Specifically, as a preferred embodiment, the rubber sealing sleeve 11 is divided into a convex outer section 101 and an inner section 102. There is a gap between the convex outer section 101 and the inner section 102. The outer wall surface of the inner section 102 is provided with an external thread, and the inner wall surface of the port of each welding end 1 is provided with an internal thread. During installation, the convex outer section 101 of each rubber sealing sleeve 11 is sleeved on the outer wall of each welding end 1, and the side surface of the convex outer section 101 is attached to the side surface of the welding end 1. The inner section 102 is screwed into the inner wall of each welding end 1 to improve the sealing performance and prevent leakage.

[0029] like Figure 3 and Figure 4 As shown, the implementation also includes: an outer layer 3, the outer layer 3 includes a metal reinforcement layer 31, a noise reduction layer 32 and a polyurethane foam 33 filled between the steel pipe layer 21 and the polyethylene layer 22;

[0030] The noise reduction layer 32 is wrapped around the outside of the polyethylene layer 22, and the metal reinforcement layer 31 is wrapped around the outside of the noise reduction layer 32. The metal reinforcement layer 31 can enhance the overall structural strength of the coated composite steel pipe, thereby reducing the risk of pipe bending or damage due to unexpected factors.

[0031] Specifically, as a preferred embodiment, the noise reduction layer 32 is filled with a sound-absorbing material, which is polyester fiber cotton. The inner and outer walls of the noise reduction layer 32 are coated with a layer of sound-insulating coating 321, which can effectively absorb the noise generated during water supply or drainage operations, significantly reducing environmental noise pollution.

[0032] In this embodiment, a buffer layer 34 is additionally provided between the polyurethane foam 33 and the steel pipe layer 21. The buffer layer 34 is filled with butyl rubber. This design can provide a buffer to prevent damage to the pipe body caused by excessive water supply or drainage pressure.

[0033] like Figures 1 to 4 As shown, in this embodiment, it should be noted before the application document is implemented that this application document only improves the shortcomings of the existing plastic-coated composite steel pipe, which has relatively weak sealing, protection and noise reduction performance, affecting the durability of the steel pipe in complex environments and thus shortening its expected service life, and does not involve improvements in other aspects; the working principle of this plastic-coated composite steel pipe with welded ends is introduced as follows:

[0034] When the utility model is installed and used, the convex outer section 101 of each rubber sealing sleeve 11 is put on the outer wall of each welding end 1, so that the side of the convex outer section 101 is attached to the side of the welding end 1, and the inner section 102 is screwed on the inner wall of each welding end 1. This can enhance the sealing effect during fluid transportation and effectively prevent the occurrence of leakage problems;

[0035] This utility model incorporates a multifunctional outer layer 3 on the exterior of the pipe body 2, integrating the dual functions of a noise reduction layer 32 and a thermal insulation layer. The noise reduction layer 32 utilizes a highly efficient sound-absorbing material to effectively absorb noise generated during water supply or drainage operations, significantly reducing environmental noise pollution. Furthermore, the thermal insulation layer is designed to take into account the climatic conditions of different regions, ensuring stable operation of the water supply or drainage system in a variety of environments and meeting diverse application needs.

[0036] In addition, a buffer layer 34 is provided between the insulation layer and the steel pipe layer 21 within the outer layer 3 to prevent damage to the coated composite steel pipe caused by excessive water supply / drainage pressure. Furthermore, a metal reinforcement layer 31 is embedded within the outer layer 3. This design greatly enhances the overall structural strength of the coated composite steel pipe and significantly reduces the risk of pipe bending or damage due to unexpected factors. In summary, this coated composite steel pipe not only significantly improves its durability in complex environmental conditions, but also further extends its expected service life.

[0037] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A plastic-coated composite steel pipe with welded ends, characterized in that: It comprises a tube body (2) and welding ends (1) arranged at both ends of the tube body (2); The tube body (2) is divided into a steel tube layer (21) and a polyethylene layer (22) wrapped around the outside of the steel tube layer (21), and each of the welding ends (1) is provided with a rubber sealing sleeve (11); It also includes: an outer layer (3), the outer layer (3) including a metal reinforcement layer (31), a noise reduction layer (32), and polyurethane foam (33) filled between the steel pipe layer (21) and the polyethylene layer (22); The noise reduction layer (32) is wrapped around the outside of the polyethylene layer (22), and the metal reinforcement sheet layer (31) is wrapped around the outside of the noise reduction layer (32).

2. The plastic-coated composite steel pipe with a welded end according to claim 1, characterized in that: The rubber sealing sleeve (11) is divided into a convex outer section (101) and an inner section (102), and a gap exists between the convex outer section (101) and the inner section (102).

3. The plastic-coated composite steel pipe with a welding end according to claim 2, characterized in that: The outer wall surface of the inner section (102) is provided with an external thread, and the inner wall surface of the port of each welding end (1) is provided with an internal thread.

4. The plastic-coated composite steel pipe with a welded end according to claim 1, characterized in that: The noise reduction layer (32) is filled with a sound-absorbing material, and the sound-absorbing material is polyester fiber cotton.

5. The plastic-coated composite steel pipe with welded ends according to claim 1, characterized in that: Furthermore, a layer of sound insulation paint (321) is coated on both the inner wall and the outer wall of the noise reduction layer (32).

6. The plastic-coated composite steel pipe with welded ends according to claim 1, characterized in that: A buffer layer (34) is further provided between the polyurethane foam (33) and the steel tube layer (21), and the buffer layer (34) is filled with butyl rubber.

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