PE gas pipe material suitable for high water level section

Abstract

This application discloses a PE gas pipe suitable for high-water-level areas, comprising: a plug and a socket sleeved outside the plug. The socket has an anti-seepage groove on its outer side, with an expansion sealing ring installed within the groove. A groove is provided inside the plug, with a wedge-shaped sealing ring installed within it. A groove is also provided on the plug, with a sealing ring installed within it. A fixing groove for embedding the wedge-shaped sealing ring is provided on the sealing ring. A fastening structure is fitted outside the socket corresponding to the wedge-shaped sealing ring. Both the plug and the socket include coaxially stacked inner, reinforcing, and outer layers. A ring-shaped positioning bracket is fitted on the outer layer, with its legs connected to anchors buried underground. Designed for environments with high groundwater levels and long-term water accumulation, this system, based on multi-layered structural reinforcement, rigid anchoring anti-buoyancy positioning, and a double-sealing structure, not only effectively prevents gas pipelines from floating, shifting, or deforming due to buoyancy, but also significantly improves the anti-seepage capability of the joints and the long-term reliability of the system.

Description

Technical Field

[0001] This application belongs to the field of gas pipe materials, specifically a PE gas pipe material suitable for high water level areas. Background Technology

[0002] With the widespread laying of urban gas pipelines, many pipelines need to be laid along special sections such as areas with high groundwater levels, soft soil, or river wetlands due to geological and climatic conditions. In these environments, conventional PE gas pipe systems are prone to floating and migrating due to buoyancy, or deforming to varying degrees due to soft soil settlement. In addition, continuous groundwater infiltration can challenge the sealing performance of pipe connections, creating potential leakage hazards and seriously threatening the safe operation of the pipeline.

[0003] Currently, pipe connections on the market are achieved through thermofusion. While conventional measures such as reinforcing ribs and thicker pipes exist, they still cannot fundamentally solve problems related to buoyancy resistance, seepage prevention, and long-term sealing in high-water environments. Firstly, the sealing performance of thermofusion and electrofusion welding is highly dependent on construction quality. Uneven temperature, insufficient pressure, or impurities during welding can create microscopic bubbles, incomplete welds, and other hidden gaps that are difficult to detect with the naked eye. Furthermore, groundwater at high water levels has continuous seepage pressure (the higher the water level, the greater the pressure), meaning even a 0.1mm gap can become a seepage channel. Secondly, PE pipes exhibit thermal expansion and contraction. In high-water environments, underground temperature fluctuations and minor foundation settlement can cause continuous stress at pipe joints. Under long-term stress, hidden defects at the weld joints will gradually expand, even leading to cracking. Reinforcing ribs or thicker pipes can only enhance the strength of the pipe itself and cannot alleviate the stress at the joints.

[0004] If a gas pipeline experiences a leak that causes the joint seal to fail, groundwater will seep into the joint gap first. Since gas itself is pressurized (gas transmission pressure), when the joint seal is damaged, the gas may leak back into the soil along the same gap. High concentrations of gas mixed with air can easily cause safety accidents such as explosions and poisoning. Therefore, a PE gas pipe material suitable for high water levels is needed to solve the safety hazards. Utility Model Content

[0005] In view of the above-mentioned problems in the existing technology, this application provides a PE gas pipe suitable for high water level areas. For high water level areas, anti-buoyancy positioning components and anti-seepage sealing system are added to the pipe body to ensure the long-term safe operation of gas pipelines in high water level or long-term water accumulation areas.

[0006] To achieve the above objectives, this application adopts the following technical solution: a PE gas pipe suitable for high water level areas, comprising: a plug and a socket sleeved on the outside of the plug, the socket has an anti-seepage groove on the outside of the plug, an expansion sealing ring installed in the anti-seepage groove, a first groove on the inside of the plug, a wedge-shaped sealing ring installed in the first groove, a second groove on the plug, a sealing ring installed in the second groove, a fixing groove for embedding the wedge-shaped sealing ring on the sealing ring, a fastening structure sleeved on the outside of the socket corresponding to the wedge-shaped sealing ring, both the plug and the socket include an inner layer, a reinforcing layer and an outer layer coaxially superimposed, an annular positioning bracket sleeved on the outer layer, and the legs of the positioning bracket connected to anchors buried underground.

[0007] The fastening structure is an integrated structure of high-strength bolts and clamps.

[0008] The reinforcing layer includes a steel wire mesh that is uniformly wound around the outer surface of the inner layer in a multi-head spiral manner.

[0009] An elastic buffer pad is provided between the outer layer and the positioning bracket.

[0010] The reinforcing layer is bonded to the inner and outer layers with high-performance PE adhesive to form an integrated composite pipe.

[0011] The outer layer is made of high-density polyethylene with added antioxidants and ultraviolet absorbers, and the surface is covered with a smooth, impermeable protective membrane.

[0012] The beneficial effects of this application are:

[0013] This application provides a PE gas pipe suitable for high-water-level areas. Targeting environments with high groundwater levels and long-term water accumulation, it features a multi-layered reinforced structure, rigid anchoring for anti-buoyancy positioning, and a double-sealing structure. This not only effectively prevents gas pipelines from floating, shifting, or deforming due to buoyancy, but also significantly improves the leak-proof capability of the joints and the long-term reliability of the system. It has extremely high applicability and application value for high-risk areas such as urban gas pipelines crossing rivers, wetlands, soft soil, and areas prone to water accumulation during the rainy season, effectively ensuring the safety of urban gas transmission. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the PE gas pipe material of this application;

[0015] Figure 2 This is a schematic diagram of the interface connection structure of the PE gas pipe material in this application;

[0016] In the figure, 1—inner layer, 2—reinforcing layer, 3—outer layer, 4—buffer pad, 5—positioning bracket, 6—leg, 7—anchor, 8—insertion tube, 9—suppository tube, 10—expansion sealing ring, 11—sealing ring, 12—wedge-shaped sealing ring, 13—fastening clamp. Detailed Implementation

[0017] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0018] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0020] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] Example

[0022] like Figure 1 The diagram shows a type of PE gas pipe suitable for high-water-level areas. The pipe body is composed of three coaxially stacked parts: an inner layer 1, a reinforcing layer 2, and an outer layer 3. The inner layer 1 of the pipe body is made of medium-density polyethylene or high-density polyethylene and is in direct contact with the gas medium being transported. This layer has strong chemical corrosion resistance and gas barrier properties, preventing gas leakage and protecting the pipe body from damage caused by gas corrosion.

[0023] A reinforcing layer 2, designed to enhance the mechanical properties of the pipe, is placed between the inner layer 1 and the outer layer 3. Reinforcing layer 2 is a steel wire mesh structure, uniformly wound around the outer surface of the inner layer 1 using a multi-head spiral method, with 1-3 layers. The spacing and winding angle between each layer of steel wire are strictly controlled, achieving a tight fit with the inner layer 1 through automated winding equipment. Reinforcing layer 2 improves the gas pipe's compressive strength, tensile strength, and circumferential stiffness, and significantly reduces cracking. Reinforcing layer 2 is bonded to the inner layer 1 and outer layer 3 using high-performance PE adhesive, forming a robust, integrated composite pipe. The adhesive curing process is completed at high temperature, ensuring no delamination or detachment between the multiple layers.

[0024] The outer layer 3 is made of high-density polyethylene, which protects the reinforcing layer 2 and the inner layer 1 while effectively resisting external mechanical impact, ultraviolet radiation, aging, and biological corrosion. Antioxidants and ultraviolet absorbers are precisely added to the outer layer 3, and a smooth, impermeable protective film can be formed on the outermost surface through an extrusion process, further enhancing its hydrolysis resistance and impermeability. For high-water-level conditions, the carbon black content in the outer layer 3 is increased to enhance durability.

[0025] To address the threat of pipeline buoyancy to the pipeline structure in environments with high groundwater levels, an anti-buoyancy positioning component was designed on the outside of the pipe. This component consists of three parts: a positioning bracket 5, anchors 7, and a rubber buffer pad 4. The positioning bracket 5 is integrally injection molded from high-density polyethylene, with a ring-shaped structure wrapping around the outer layer 3 of the pipe. A rubber buffer pad 4 is inserted between the inside of the bracket and the outer layer 3. The buffer pad 4 is made of nitrile rubber and manufactured using a special process, effectively absorbing stress changes caused by thermal expansion and contraction of the pipeline or minor deformation of the foundation, preventing wear from hard contact. Support legs 6 are installed at the bottom of the positioning bracket 5. These legs can be mounted at either end of the positioning bracket 5 or as a tripod structure, depending on the installation environment. A square connecting plate is installed at the bottom of the supporting leg 6, with multiple bolt mounting holes. High-strength bolts are used for rigid connection with the anchors 7. During installation, the lower part of the anchors 7 is buried in solid underground rock or dense soil, and then the connecting plate is tightened to the connecting bolts at the top of the anchors 7 using high-strength bolts.

[0026] During installation, multiple sets of anti-buoyancy positioning components are installed at intervals along the pipeline. The positioning bracket 5 is wrapped around the designated part of the outer layer 3 of the pipeline, and the buffer pad 4 is tightly attached to the inside of the bracket and the outer layer 3 of the pipeline. Then, the bottom bolt of the bracket is passed through the threaded hole at the top of the anchor 7 and tightened. This forms a rigid connection between the pipe and the underground foundation, effectively resisting the uplift, displacement and structural deformation caused by groundwater buoyancy, soil softening, external loads, etc., ensuring that the pipeline is always in the designed axis and burial depth.

[0027] The connections between different sections of the gas pipeline are made using hot-melt or electrofusion welding processes to ensure that each section forms a continuous, integrated, and sealed structure. For example... Figure 2 As shown, to enhance the seepage prevention and sealing capabilities of the interface, the connector adopts a socket structure. A seepage prevention groove is formed on the outer side of the socket pipe 9, and an expansion sealing ring 10 is embedded within the groove. The expansion sealing ring 10 is made of synthetic rubber with a high expansion ratio, initially forming an interference fit with the seepage prevention groove. When groundwater seeps in, the rubber ring absorbs water and expands to 2-3 times its original size, tightly filling the entire seepage prevention groove space, thus forming a second secondary sealing barrier around the connection interface, significantly improving the seepage prevention performance of the interface.

[0028] A first groove is provided on the inner side of the socket of the socket 9, and a wedge-shaped sealing ring 12 is installed in the first groove. A second groove is provided on the socket 8, and a sealing ring 11 is installed in the second groove. The sealing ring 11 has a fixing groove for embedding and installing the wedge-shaped sealing ring 12. The sealing ring 11 is made of elastomeric material, and a preliminary seal is achieved during installation due to radial interference compression against the mating surface. The wedge-shaped sealing ring 12 is located outside the sealing ring 11. As the fastening device tightens, the wedge-shaped ring applies radial pressure evenly to the sealing ring 11, the interface mating surface, and the rubber ring, further enhancing the reliability and durability of the seal at the interface. The fastening device is an integrated structure of high-strength bolts and clamps, which is sleeved on the outer layer 3 corresponding to the wedge-shaped sealing ring 12.

[0029] Once the groundwater level rises or external water seeps in, the buoyancy force on the pipeline will increase significantly. At this time, the anchor 7 in the anti-buoyancy positioning component, through a rigid connection, directly transfers the buoyancy and displacement of the pipeline to the solid underground rock or dense soil, ensuring that the pipeline does not shift or float. The rubber buffer pad 4 between the positioning bracket 5 and the outer layer 3 effectively absorbs the stress caused by the thermal expansion and contraction of the pipeline and slight settlement of the foundation, preventing damage to the pipe body or protective layer due to rigid constraints. When the pipeline undergoes axial expansion and contraction due to environmental temperature differences, the buffer pad 4 allows for slight relative slippage, releasing internal stress and extending the lifespan of the pipeline and the anti-buoyancy component.

[0030] For pipe connections, the sealing ring 11, wedge-shaped sealing ring 12, and fastening device form a highly reliable primary seal upon initial installation. If groundwater seeps into the vicinity of the interface, the water-swellable rubber ring will actively absorb water and expand, densely filling the seepage-proof groove to form a secondary sealing barrier, greatly reducing the risk of leakage and ensuring the airtightness of the gas medium. All components of the entire pipeline system are organically integrated through mechanical interlocking, adhesive bonding, welding, and flexible fit. The main structure and auxiliary devices work in coordination, efficiently and collaboratively achieving multiple layers of protection against buoyancy, seepage, and sealing.

[0031] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0032] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0033] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A PE gas pipe suitable for high-water-level areas, characterized in that, include: The device includes an insertion tube and a support tube fitted over the outside of the insertion tube. The outside of the insertion port of the support tube is provided with a seepage-proof groove, and an expansion sealing ring is installed in the seepage-proof groove. The inside of the insertion port is provided with a first groove, and a wedge-shaped sealing ring is installed in the first groove. The insertion tube is provided with a second groove, and a sealing ring is installed in the second groove. The sealing ring is provided with a fixing groove for embedding and installing the wedge-shaped sealing ring. A fastening structure is fitted over the outside of the support tube corresponding to the wedge-shaped sealing ring. Both the insertion tube and the support tube include an inner layer, a reinforcing layer and an outer layer that are coaxially stacked. A positioning bracket is fitted over the outer layer, and the legs of the positioning bracket are connected to anchors buried underground.

2. The PE gas pipe suitable for high water level areas as described in claim 1, characterized in that, The fastening structure is an integrated structure of high-strength bolts and clamps.

3. The PE gas pipe suitable for high water level areas as described in claim 1, characterized in that, The reinforcing layer includes a wire mesh that is uniformly wound around the outer surface of the inner layer in a multi-head spiral manner.

4. The PE gas pipe suitable for high water level areas as described in claim 1, characterized in that, An elastic buffer pad is provided between the outer layer and the positioning bracket.

5. The PE gas pipe suitable for high water level areas as described in claim 1, characterized in that, The reinforcing layer is bonded to the inner layer and the outer layer with a high-performance PE adhesive to form an integrated composite pipe.

6. The PE gas pipe suitable for high water level areas as described in claim 1, characterized in that, The outer layer is made of high-density polyethylene with added antioxidants and ultraviolet absorbers, and the surface is covered with a smooth, impermeable protective membrane.

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