A liner pipe for pipeline rehabilitation

Abstract

The utility model discloses a kind of inner liner pipe for pipeline repair, it is related to inner liner pipe technical field, including inner liner pipe body, multiple inner wall support rings are connected in the inner liner pipe body;The utility model is connected with multiple inner wall support rings of linear array equidistant distribution along the axis direction in the inner liner pipe body, and the inner wall of inner liner pipe body is supported by structure, when the medium pressure in pipeline changes or is subjected to external soil pressure, inner wall support ring can disperse pressure, prevent inner liner pipe body from being inwardly concave deformation, when the pressure fluctuation of the water flow flow rate of water supply and drainage pipeline is sharply changed, inner wall support ring can maintain the shape stability of inner liner pipe body, ensure water cross-sectional area, avoid water flow conveying efficiency reduction and plugging problem;In petroleum, natural gas conveying pipeline, medium flow resistance can be reduced, while avoiding stress concentration at concave place to accelerate inner liner pipe body damage.

Description

Technical Field

[0001] This utility model relates to the field of inner lining pipe technology, specifically to an inner lining pipe for pipeline repair. Background Technology

[0002] With the acceleration of urbanization, the aging problems of water supply, drainage, and industrial pipeline systems are becoming increasingly prominent. Traditional pipeline repair methods, such as large-scale excavation and pipeline replacement, are not only large-scale and costly projects, but also have serious negative impacts on the environment and traffic. To overcome these problems, pipe lining repair technology has been widely used.

[0003] However, during pipeline operation, due to changes in internal medium pressure or external soil pressure, the inner liner pipe, lacking effective support, is prone to inward deformation. In water supply and drainage pipelines, when the water flow rate changes drastically, pressure fluctuations can cause localized indentation of the inner liner pipe, resulting in a reduction in the water flow cross-section, affecting water transport efficiency, and even causing blockages. In oil and natural gas pipelines, indentation deformation may increase the resistance to medium flow, increase transport energy consumption, and stress concentration is also prone to occur at the indentation, accelerating the damage to the inner liner pipe. Furthermore, the lack of internal support for the liner makes installation difficult. Due to its insufficient structural strength, the liner is prone to wrinkling and twisting when pushed into the damaged pipe, failing to fit tightly against the outer pipe wall and reducing the sealing and integrity of the repair. Moreover, during long-term operation, the unsupported liner cannot withstand the impact of the flowing medium within the pipe and the vibrations of the external environment, making it prone to displacement and detachment. This can lead to renewed leaks in the repaired pipe, failing to achieve the desired repair effect and potentially causing safety accidents.

[0004] To address these issues, we designed a pipe liner for pipeline repair. Utility Model Content

[0005] The purpose of this utility model is to provide an inner lining pipe for pipeline repair, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a pipe liner for pipe repair, including a pipe liner body. Multiple inner wall support rings are connected within the pipe liner body. These inner wall support rings are arranged in a linear array with equal spacing along the axial direction of the pipe liner body. Multiple flow guiding grooves are formed on the inner wall support rings. These flow guiding grooves are hexagonal in shape and are arranged in a circumferential array with equal spacing around the center of the inner wall support ring. Multiple positioning protrusions are connected to the outer surface of the pipe liner body and are arranged in a circumferential array on the pipe liner body.

[0007] Furthermore, an anti-corrosion layer is provided on the inner wall of the inner liner tube body, the anti-corrosion layer being made of ultra-high molecular weight polyethylene, and an outer protective layer is provided on the outer surface of the inner liner tube body, the outer protective layer being made of high-density polyethylene.

[0008] Furthermore, an anti-corrosion layer is bonded to the other side of the wear-resistant layer, and the anti-corrosion layer is made of epoxy resin.

[0009] Furthermore, an insulation layer is bonded to the side of the anti-corrosion layer away from the wear-resistant layer, and the insulation layer is made of polyurethane foam.

[0010] Furthermore, a reinforcing layer is provided on the side of the insulation layer away from the anti-corrosion layer, and the reinforcing layer is made of glass fiber reinforced plastic.

[0011] Furthermore, a mounting flange is connected to one side of the inner liner tube body, and the mounting flange has multiple limiting threaded holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: Multiple inner wall support rings, linearly arrayed and evenly spaced along the axial direction and connected within the inner liner pipe body, provide structural support to the inner wall of the inner liner pipe body. When the pressure of the medium inside the pipeline changes or is subjected to external soil pressure, the inner wall support rings can disperse the pressure, preventing the inner liner pipe body from deforming inwards. When the water flow rate in water supply and drainage pipelines changes drastically, causing pressure fluctuations, the inner wall support rings can maintain the shape stability of the inner liner pipe body, ensuring the cross-sectional area for water flow and avoiding reduced water transport efficiency and blockage problems. In oil and natural gas pipelines, it can reduce the resistance to medium flow and prevent stress concentration at recessed areas from accelerating damage to the inner liner pipe body. The hexagonal flow guide grooves on the inner wall support rings, evenly distributed along the circumference of the center, can guide the flow of the medium while supporting the inner liner pipe body. When the medium flows through the inner wall support ring, the flow guide groove allows the medium to pass through more smoothly, reducing the impact and resistance of the medium on the support ring. The reinforcing layer can cooperate with the inner wall support ring to further enhance the overall strength and pressure resistance of the inner liner pipe body. When the pipeline is subjected to external pressure or internal pressure fluctuations, the reinforcing layer can effectively disperse the pressure.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the multiple positioning protrusions arranged in a circumferential array on the outer surface of the inner liner tube body can contact the inner wall of the outer pipe during installation, play a positioning role, assist the inner liner tube body in being placed inside the outer pipe, prevent displacement or twisting during installation, and ensure that the inner liner tube body is tightly fitted to the inner wall of the outer pipe. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the overall external structure of this utility model; Figure 2This is a side view of the present invention; Figure 3 This is a schematic diagram of the planar structure of the present invention; Figure 4 This utility model Figure 2 Enlarged view of point A in the middle.

[0015] In the diagram: 1. Inner liner tube body; 2. Inner wall support ring; 3. Flow guide groove; 4. Insulation layer; 5. Anti-corrosion layer; 6. Reinforcing layer; 7. Outer protective layer; 8. Mounting flange; 9. Limiting threaded hole; 10. Positioning convex ball; 11. Wear-resistant layer. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-4 This utility model provides a technical solution: a liner pipe for pipe repair, including a liner pipe body 1, with multiple inner wall support rings 2 connected inside the liner pipe body 1. The multiple inner wall support rings 2 are linearly arrayed and evenly spaced along the axial direction of the liner pipe body 1. Multiple flow guiding grooves 3 are formed on the inner wall support rings 2. The flow guiding grooves 3 are arranged in a regular hexagon. The multiple flow guiding grooves 3 are arranged in a circumferential array and evenly spaced around the center of the inner wall support rings 2. Multiple positioning protrusions 10 are connected to the outer surface of the liner pipe body 1. The multiple positioning protrusions 10 are arranged in a circumferential array on the liner pipe body 1.

[0018] In practical implementation, multiple linearly arrayed, equally spaced inner wall support rings 2 connected within the inner liner body 1 provide structural support to the inner wall of the inner liner body 1. When the pressure of the medium inside the pipeline changes or is subjected to external soil pressure, the inner wall support rings 2 can disperse the pressure and prevent the inner liner body 1 from deforming inward. For example, when the water flow rate in water supply and drainage pipelines changes drastically and causes pressure fluctuations, the inner wall support rings 2 can maintain the shape stability of the inner liner body 1, ensure the cross-sectional area for water flow, and avoid reduced water transport efficiency and blockage problems. In oil and natural gas pipelines, it can reduce the resistance to medium flow and prevent stress concentration at the depression from accelerating the damage to the inner liner body 1. The flow guiding grooves 3, which are hexagonal in shape and equally spaced along the circumference of the inner wall support rings 2, can guide the flow of the medium while supporting the inner liner body 1. When the medium flows through the inner wall support ring 2, the flow guide groove 3 allows the medium to pass through more smoothly, reducing the impact and resistance of the medium on the support ring. The multiple positioning protrusions 10 arranged in a circular array on the outer surface of the inner liner body 1 can contact the inner wall of the external pipe during installation, playing a positioning role and assisting the inner liner body 1 in being placed inside the external pipe. This prevents offset, twisting, or other issues during installation and ensures that the inner liner body 1 is tightly fitted to the inner wall of the external pipe.

[0019] See Figure 1-4 The inner wall of the inner liner tube body 1 is provided with an anti-corrosion layer 5, which is made of ultra-high molecular weight polyethylene. The outer surface of the inner liner tube body 1 is provided with an outer protective layer 7, which is made of high-density polyethylene.

[0020] In specific implementation, the anti-corrosion layer 5 is made of ultra-high molecular weight polyethylene, which can effectively resist the erosion of corrosive media in the pipeline. When transporting media containing corrosive substances such as acids and alkalis, the anti-corrosion layer 5 can form a protective barrier to prevent the inner liner pipe body 1 from being corroded and damaged, and extend the service life of the inner liner pipe body 1. The outer protective layer 7 on the outer surface of the inner liner pipe body 1 is made of high-density polyethylene, which has good weather resistance, aging resistance and UV resistance. The outer protective layer 7 can protect the inner liner pipe body 1 from the effects of sun exposure, rain, wind and sand, and avoid damage to the inner liner pipe body 1 caused by the external environment.

[0021] See Figure 1-4 On the other side of the wear-resistant layer 11, an anti-corrosion layer 5 is bonded, and the anti-corrosion layer 5 is made of epoxy resin.

[0022] In practice, epoxy resin has stronger chemical stability and corrosion resistance, which can further enhance the protection of the inner lining pipe body 1. When the medium inside the pipe is highly corrosive, this anti-corrosion layer 5 can provide better protection.

[0023] See Figure 1-4The anti-corrosion layer 5 is bonded to the side away from the wear-resistant layer 11, and the insulation layer 4 is made of polyurethane foam.

[0024] In practice, the insulation layer 4 is made of polyurethane foam, which has an extremely low thermal conductivity and excellent insulation performance. When the pipeline transports hot water, steam and other media, the insulation layer 4 can reduce the heat exchange between the medium inside the pipeline and the external environment, reduce heat loss and improve energy utilization efficiency.

[0025] See Figure 1-4 A reinforcing layer 6 is provided on the side of the insulation layer 4 away from the anti-corrosion layer 5. The material of the reinforcing layer 6 is glass fiber reinforced plastic.

[0026] In practice, the reinforcing layer 6 can cooperate with the inner wall support ring 2 to further enhance the overall strength and pressure resistance of the inner liner pipe body 1. When the pipeline is subjected to external pressure or internal pressure fluctuations, the reinforcing layer 6 can effectively disperse the pressure.

[0027] See Figure 1-4 The inner liner tube body 1 is connected to a mounting flange 8 on one side, and the mounting flange 8 has multiple limit threaded holes 9.

[0028] In practice, during installation, adjacent inner liner tube bodies 1 can be connected together by passing bolts through the limiting threaded holes 9.

[0029] Working principle: Multiple linearly arrayed, equally spaced inner wall support rings 2 connected within the inner liner pipe body 1 provide structural support to the inner wall of the inner liner pipe body 1. When the pressure of the medium inside the pipeline changes or is subjected to external soil pressure, the inner wall support rings 2 can disperse the pressure and prevent the inner liner pipe body 1 from deforming inward. For example, when the water flow rate in water supply and drainage pipelines changes drastically and causes pressure fluctuations, the inner wall support rings 2 can maintain the shape stability of the inner liner pipe body 1, ensure the cross-sectional area for water flow, and avoid reduced water transport efficiency and blockage problems. In oil and natural gas pipelines, it can reduce the resistance to medium flow and prevent stress concentration at the depression from accelerating the damage to the inner liner pipe body 1. The flow guiding grooves 3, which are hexagonal in shape and equally spaced along the circumference of the inner wall support rings 2, can guide the flow of the medium while supporting the inner liner pipe body 1. When the medium flows through the inner wall support ring 2, the flow guide groove 3 allows the medium to pass through more smoothly, reducing the impact and resistance of the medium on the support ring. Multiple positioning protrusions 10 arranged in a circumferential array on the outer surface of the inner liner body 1 can contact the inner wall of the external pipe during installation, playing a positioning role and assisting the inner liner body 1 in being placed inside the external pipe. This prevents offset or twisting during installation and ensures that the inner liner body 1 is tightly fitted to the inner wall of the external pipe. The reinforcing layer 6 can cooperate with the inner wall support ring 2 to further enhance the overall strength and pressure resistance of the inner liner body 1. When the pipe is subjected to external pressure or internal pressure fluctuations, the reinforcing layer 6 can effectively disperse the pressure. During installation, adjacent inner liner bodies 1 can be connected together by bolts passing through the limiting threaded holes 9.

Claims

1. A liner pipe for pipe repair, comprising a liner pipe body (1), characterized in that, The inner liner tube body (1) is connected to a plurality of inner wall support rings (2). The plurality of inner wall support rings (2) are arranged in a linear array with equal spacing along the axial direction of the inner liner tube body (1). The inner wall support rings (2) are provided with a plurality of flow guide grooves (3). The flow guide grooves (3) are arranged in a regular hexagon. The plurality of flow guide grooves (3) are arranged in a circular array with equal spacing around the center of the inner wall support rings (2). The outer surface of the inner liner tube body (1) is connected to a plurality of positioning convex balls (10). The plurality of positioning convex balls (10) are arranged in a circular array on the inner liner tube body (1).

2. The pipe liner for pipeline repair as described in claim 1, characterized in that: The inner wall of the inner liner tube body (1) is provided with an anti-corrosion layer (5), the material of the anti-corrosion layer (5) is ultra-high molecular weight polyethylene, and the outer surface of the inner liner tube body (1) is provided with an outer protective layer (7), the material of the outer protective layer (7) is high density polyethylene.

3. The pipe liner for pipeline repair as described in claim 2, characterized in that: The anti-corrosion layer (5) is made of epoxy resin.

4. The pipe liner for pipeline repair as described in claim 3, characterized in that: The anti-corrosion layer (5) is bonded to one side with a heat insulation layer (4), and the heat insulation layer (4) is made of polyurethane foam.

5. The pipe liner for pipeline repair as described in claim 4, characterized in that: The insulation layer (4) is provided with a reinforcing layer (6) on the side away from the anti-corrosion layer (5), and the reinforcing layer (6) is made of glass fiber reinforced plastic.

6. The pipe liner for pipeline repair as described in claim 5, characterized in that: The inner liner tube body (1) is connected to a mounting flange (8) on one side, and the mounting flange (8) is provided with multiple limiting threaded holes (9).

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