Compression-resistant hot-dip plastic steel pipe

Abstract

The utility model discloses a compression-resistant hot-dip plastic steel pipe which comprises a hot-dip plastic steel pipe body, an expansion joint and an inner joint are arranged at the two ends of the hot-dip plastic steel pipe body respectively, and a plurality of annular reinforcing ribs are arranged on the outer wall of the hot-dip plastic steel pipe body at equal intervals in the length direction. Buffering grooves are formed in the portions, between the adjacent annular reinforcing ribs, of the outer wall of the hot-dip plastic steel pipe body, the buffering grooves are filled with elastic buffering materials, annular reinforcing sleeves are embedded into the ends of the expanded joints and the ends of the inner joints correspondingly, and the annular reinforcing sleeves are connected with the hot-dip plastic steel pipe body in an interference fit mode. Due to the fact that the annular reinforcing ribs are arranged, the overall structural strength of the steel pipe is effectively enhanced, the buffer grooves between the adjacent annular reinforcing ribs are filled with the elastic buffer materials, the compression resistance of the steel pipe is improved, and the service life of the steel pipe is prolonged. The annular reinforcing sleeves are embedded into the end portions of the expansion joint and the inner joint, so that the connection strength and the anti-pressure ability of the joint portions are greatly enhanced.

Description

Technical Field

[0001] This utility model relates to the technical field of hot-dip plastic-coated steel pipe devices, specifically to a pressure-resistant hot-dip plastic-coated steel pipe. Background Technology

[0002] Hot-dip plastic-coated steel pipe is a type of pipe that undergoes a hot-dip plastic coating process. This involves immersing the steel pipe substrate in a specific plastic powder, resulting in a uniform and robust plastic coating on the pipe surface. This coating not only provides the steel pipe with excellent corrosion resistance, enabling long-term use in harsh environments, but also effectively prevents internal rusting, extending the pipe's service life.

[0003] However, traditional hot-dip plastic-coated steel pipes have certain deficiencies in terms of pressure resistance. In some special applications, such as deeply buried underground pipeline projects and industrial pipelines subjected to large external pressures, traditional hot-dip plastic-coated steel pipes, due to their structural limitations, are unable to meet the increasing pressure resistance requirements. Under significant external pressure, the pipe walls of traditional hot-dip plastic-coated steel pipes are prone to deformation or even rupture, leading to pipeline leaks and other safety accidents. In addition, the connection strength and pressure resistance of traditional hot-dip plastic-coated steel pipes at the joints are relatively weak. Under long-term pressure or impact, the joints are prone to loosening and disassembly. Utility Model Content

[0004] (I) Technical Issues

[0005] The present invention aims to overcome the shortcomings of insufficient pressure resistance of traditional hot-dip plastic-coated steel pipes and provide a new type of hot-dip plastic-coated steel pipe with significantly improved pressure resistance and stable structure.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a pressure-resistant hot-dip plastic-coated steel pipe, comprising a hot-dip plastic-coated steel pipe body, wherein an expansion joint and an inner joint are respectively provided at both ends of the hot-dip plastic-coated steel pipe body, and a plurality of annular reinforcing ribs are provided at equal intervals along the length direction on the outer wall of the hot-dip plastic-coated steel pipe body between adjacent annular reinforcing ribs, wherein the buffer grooves are filled with elastic buffer material, and annular reinforcing sleeves are embedded at the ends of the expansion joints and the inner joints, wherein the annular reinforcing sleeves are connected to the hot-dip plastic-coated steel pipe body by an interference fit, and buffer rubber rings are fixedly provided at the ends of the expansion joints and the inner joints and on the outside of the annular reinforcing sleeves.

[0008] Furthermore, the annular reinforcing rib is integrally formed with the hot-dip plastic-coated steel pipe body.

[0009] Furthermore, the elastic cushioning material is rubber or polyurethane foam.

[0010] Furthermore, the thickness of the annular reinforcing sleeve is - mm, and the yield strength of the material is greater than the yield strength of the hot-dip plastic-coated steel pipe body material.

[0011] Furthermore, a conical pressure-resistant shield is provided on the outer side of the connection between the expansion joint and the hot-dip plastic-coated steel pipe body. One end of the conical pressure-resistant shield is fixedly connected to the edge of the expansion joint, and the other end extends outward to the outer side of the hot-dip plastic-coated steel pipe body and covers part of the outer wall of the hot-dip plastic-coated steel pipe body.

[0012] Furthermore, the wall thickness of the conical pressure-resistant shield gradually decreases from the expansion joint end to the outside, and the conical pressure-resistant shield is made of high-strength alloy steel.

[0013] (III) Technical Effects

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] 1. By setting multiple annular reinforcing ribs at equal intervals along the length of the outer wall of the hot-dip plastic-coated steel pipe, the overall structural strength of the steel pipe is effectively enhanced, enabling it to better resist external pressure and prevent pipe wall deformation. The buffer grooves between adjacent annular reinforcing ribs are filled with elastic buffer material, such as rubber or polyurethane foam. When the steel pipe is under pressure, the buffer material can absorb part of the pressure and disperse the stress, further improving the compressive strength of the steel pipe.

[0016] 2. The annular reinforcing sleeve embedded at the ends of the expansion joint and inner joint has a thickness of 3-8 mm and a yield strength greater than that of the hot-dip plastic-coated steel pipe body. It is interference-fitted with the hot-dip plastic-coated steel pipe body, greatly enhancing the connection strength and pressure resistance of the joint, effectively preventing loosening or disengagement due to pressure. Furthermore, the buffer rubber ring fixedly installed outside the annular reinforcing sleeve at the ends of the expansion joint and inner joint provides a buffering and pressure-reducing effect at the joint, improving the sealing performance and pressure resistance stability of the joint.

[0017] 3. The conical pressure-resistant shield installed on the outside of the connection between the expansion joint and the hot-dip plastic-coated steel pipe body is made of high-strength alloy steel and the wall thickness gradually decreases from the expansion joint end to the outside, which can effectively protect the weak parts of the connection. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a pressure-resistant hot-dip plastic-coated steel pipe according to this utility model. Figure 1 .

[0019] Figure 2 This is a three-dimensional structural diagram of a pressure-resistant hot-dip plastic-coated steel pipe according to this utility model. Figure 2 .

[0020] Figure 3This is a schematic diagram of the main structure of a pressure-resistant hot-dip plastic-coated steel pipe according to this utility model.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of a pressure-resistant hot-dip plastic-coated steel pipe according to this utility model.

[0022] Figure 5 This is a schematic diagram of area A of a pressure-resistant hot-dip plastic-coated steel pipe according to this utility model.

[0023] As shown in the figure: 1. Hot-dip plastic-coated steel pipe body; 2. Annular reinforcing rib; 3. Buffer groove; 4. Elastic buffer material; 5. Expander joint; 6. Inner joint; 7. Annular reinforcing sleeve; 8. Conical pressure-resistant protective cover; 9. Buffer rubber ring. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] Combined with appendix Figure 1 To be continued Figure 5A pressure-resistant hot-dip plastic-coated steel pipe includes a hot-dip plastic-coated steel pipe body 1. The hot-dip plastic-coated steel pipe body 1 has an expansion joint 5 and an inner joint 6 at both ends. Multiple annular reinforcing ribs 2 are evenly spaced along the length of the outer wall of the hot-dip plastic-coated steel pipe body 1. The annular reinforcing ribs 2 are integrally formed with the hot-dip plastic-coated steel pipe body 1. Buffer grooves 3 are provided on the outer wall of the hot-dip plastic-coated steel pipe body 1 between adjacent annular reinforcing ribs 2. The buffer grooves 3 are filled with elastic buffer material 4, which is rubber or polyurethane foam. Annular reinforcing sleeves 7 are embedded at the ends of both the expansion joints 5 and the inner joints 6. The annular reinforcing sleeves 7 are connected to the hot-dip plastic-coated steel pipe body 1 by an interference fit. The thickness of the annular reinforcing sleeves 7 is 3-8 mm, and the yield strength of the material is greater than the yield strength of the material of the hot-dip plastic-coated steel pipe body 1. Buffer rubber rings 9 are fixedly provided at the ends of both the expansion joints 5 and the inner joints 6, located outside the annular reinforcing sleeves 7.

[0028] A conical pressure-resistant cover 8 is provided on the outer side of the connection between the expansion joint 5 and the hot-dip plastic-coated steel pipe body 1. One end of the conical pressure-resistant cover 8 is fixedly connected to the edge of the expansion joint 5, and the other end extends outward to the outside of the hot-dip plastic-coated steel pipe body 1 and covers part of the outer wall of the hot-dip plastic-coated steel pipe body 1. The wall thickness of the conical pressure-resistant cover 8 gradually decreases from the end of the expansion joint 5 to the outside, and the conical pressure-resistant cover 8 is made of high-strength alloy steel.

[0029] The working principle of this pressure-resistant hot-dip plastic-coated steel pipe is as follows:

[0030] 1. When external pressure is applied to the hot-dip plastic-coated steel pipe, the annular reinforcing ribs 2 on the outer wall of the pipe first assume the main supporting and load-bearing functions. They are integrally formed on the hot-dip plastic-coated steel pipe body 1 and are evenly distributed along the length direction, which can effectively disperse the pressure, increase the overall structural rigidity of the steel pipe, and evenly distribute the external pressure to a larger pipe wall area.

[0031] 2. The elastic buffer material 4 within the buffer groove 3 between adjacent annular reinforcing ribs 2 plays a crucial role in buffering and stress absorption. The elastic buffer material 4, made of rubber or polyurethane foam, undergoes elastic deformation under pressure. Based on the material's elastic properties, it converts some of the pressure potential energy into elastic potential energy for storage. Simultaneously, during deformation, it transmits and disperses stress to the surrounding area, preventing stress concentration at a specific point or localized region. This reduces the direct pressure impact on the hot-dip plastic-coated steel pipe body 1, providing excellent buffer protection and further enhancing the overall compressive stability of the steel pipe.

[0032] 3. At the joint, the annular reinforcing sleeve 7 at the ends of the expansion joint 5 and the inner joint 6 is connected to the hot-dip plastic-coated steel pipe body 1 by an interference fit. The annular reinforcing sleeve 7, with its material yield strength greater than that of the hot-dip plastic-coated steel pipe body 1 and a suitable thickness of 3-8 mm, can effectively bear and transmit the pressure load at the joint, enhancing the structural integrity of the joint under pressure. Meanwhile, the buffer rubber ring 9 plays an auxiliary role in buffering and reducing pressure at the joint, further absorbing pressure shocks on the one hand and enhancing the sealing performance of the joint on the other.

[0033] 4. The conical pressure-resistant shield 8 at the connection between the expansion joint 5 and the hot-dip plastic-coated steel pipe body 1, with its special high-strength alloy steel material and gradually thinning wall thickness from the expansion joint 5 end to the outside, can evenly distribute the pressure along the surface of the shield according to its shape and material characteristics when subjected to external pressure, guiding the pressure to diffuse around the hot-dip plastic-coated steel pipe body 1, avoiding excessive pressure concentration in the relatively weak joint, thus providing additional and targeted pressure protection for the joint. Together with the annular reinforcing rib 2, elastic buffer material 4, annular reinforcing sleeve 7 and buffer rubber ring 9, it comprehensively improves the pressure resistance of the entire hot-dip plastic-coated steel pipe, ensuring stable and reliable operation in complex high-pressure working conditions.

[0034] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A pressure-resistant hot-dip plastic-coated steel pipe, comprising a hot-dip plastic-coated steel pipe body (1), wherein both ends of the hot-dip plastic-coated steel pipe body (1) are respectively provided with an expansion joint (5) and an inner joint (6), characterized in that: The outer wall of the hot-dip plastic-coated steel pipe body (1) is provided with a plurality of annular reinforcing ribs (2) at equal intervals along the length direction. A buffer groove (3) is provided on the outer wall of the hot-dip plastic-coated steel pipe body (1) between adjacent annular reinforcing ribs (2). The buffer groove (3) is filled with elastic buffer material (4). The ends of the expansion joint (5) and the inner joint (6) are both embedded with annular reinforcing sleeves (7). The annular reinforcing sleeves (7) are connected to the hot-dip plastic-coated steel pipe body (1) by an interference fit. The ends of the expansion joint (5) and the inner joint (6) and located outside the annular reinforcing sleeves (7) are both fixed with buffer rubber rings (9).

2. The pressure-resistant hot-dip plastic-coated steel pipe according to claim 1, characterized in that: The annular reinforcing rib (2) is integrally formed with the hot-dip plastic-coated steel pipe body (1).

3. The pressure-resistant hot-dip plastic-coated steel pipe according to claim 1, characterized in that: The elastic cushioning material (4) is rubber or polyurethane foam.

4. The pressure-resistant hot-dip plastic-coated steel pipe according to claim 1, characterized in that: The thickness of the annular reinforcing sleeve (7) is 3-8 mm, and the yield strength of the material is greater than that of the hot-dip plastic-coated steel pipe body (1).

5. The pressure-resistant hot-dip plastic-coated steel pipe according to claim 1, characterized in that: A conical pressure-resistant shield (8) is provided on the outside of the connection between the expansion joint (5) and the hot-dip plastic-coated steel pipe body (1). One end of the conical pressure-resistant shield (8) is fixedly connected to the edge of the expansion joint (5), and the other end extends to the outside of the hot-dip plastic-coated steel pipe body (1) and covers part of the outer wall of the hot-dip plastic-coated steel pipe body (1).

6. The pressure-resistant hot-dip plastic-coated steel pipe according to claim 5, characterized in that: The wall thickness of the conical pressure-resistant shield (8) gradually decreases from the end of the expansion joint (5) to the outside, and the conical pressure-resistant shield (8) is made of high-strength alloy steel.

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