Corrosion-resistant PE gas pipe

Abstract

The utility model relates to the technical field of gas pipe material, more specifically, it is a kind of corrosion -resistant PE gas pipe material, including at least two pipe units, the inner tube layer and outer tube layer are sequentially provided to each pipe unit from inside to outside;Connecting structure is equipped between the two adjacent pipe units, the connecting structure includes positioning assembly and sealing assembly;The positioning assembly is respectively arranged in the inner tube layer end portion, outer tube layer end portion of the two adjacent pipe units;The sealing assembly is sleeved on the outer tube layer of the two adjacent pipe units, and the inner side of the sealing assembly and the outer surface of outer tube layer are sealed in conjunction.The utility model realizes the quick alignment and sealing connection of pipe unit, significantly improves construction efficiency, and realizes stable anticorrosion sealing at connecting place, ensures that the connecting part and pipe body have continuous and persistent anticorrosion performance.

Description

Technical Field

[0001] This utility model relates to the technical field of gas pipes, and more specifically, to a corrosion-resistant PE gas pipe. Background Technology

[0002] PE gas pipes are buried polyethylene pipes made from polyethylene resin as the main raw material and formed by extrusion. They can be used as special pipelines for transporting combustible gases, have high comprehensive performance, and are widely used in urban gas pipelines and community gas projects to ensure gas supply and provide stable gas transmission.

[0003] In the prior art, Chinese patent CN215258550U discloses a novel PE gas pipe assembly, including an outer pipe, the inner wall of which is fixedly connected to the outer wall of an anti-bending interlayer, the inner wall of which is fixedly connected to the outer wall of an inner pipe, the anti-bending interlayer including a first braided layer, a mesh layer and a second braided layer, the outer wall of the first braided layer being bonded to the inner wall of the outer pipe, the inner wall of the first braided layer being bonded to the outer wall of the mesh layer, the inner wall of the mesh layer being bonded to the outer wall of the second braided layer, and the inner wall of the second braided layer being bonded to the outer wall of the inner pipe. This new type of PE gas pipe assembly, through the combination of the first braided layer, the mesh layer, and the second braided layer, can improve the overall bending resistance of the structure, reduce the wear of the outer and inner pipes, and thus extend the service life. However, there are still problems at the connection points of adjacent corrosion-resistant pipes: in order to ensure the continuity of corrosion protection and the reliability of sealing at the connection points, the existing connection methods mostly rely on electrofusion welding. This not only involves cumbersome installation procedures and low construction efficiency, making it difficult to meet the needs of rapid connection in engineering projects, but also some connection structures have poor compatibility with the original inner and outer anti-corrosion layers of the pipeline, which can easily make the connection points become weak points in corrosion protection. It is impossible to meet the dual requirements of rapid construction and long-term anti-corrosion sealing, which seriously affects the construction efficiency and operational safety of gas transmission projects. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing gas pipes, such as low connection efficiency and easy corrosion at the connection points, and to provide a corrosion-resistant PE gas pipe that enables rapid connection between pipes, improves installation efficiency, avoids weak points in corrosion protection at the connection points, and balances rapid construction with long-term corrosion protection and sealing.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A corrosion-resistant PE gas pipe is provided, comprising at least two pipe units, each pipe unit having an inner pipe layer and an outer pipe layer sequentially from the inside to the outside; a connecting structure is provided between two adjacent pipe units, the connecting structure including a positioning component and a sealing component; the positioning component is respectively disposed at the end of the inner pipe layer and the end of the outer pipe layer of the two adjacent pipe units; the sealing component is sleeved on the outer pipe layer of the two adjacent pipe units, and the inner side of the sealing component is in contact with the outer surface of the outer pipe layer.

[0006] This utility model discloses a corrosion-resistant PE gas pipe. During installation, positioning components at the ends of the inner and outer pipe layers assist in the rapid alignment of adjacent pipe sections. During use, a sealing component fitted onto the outer pipe layer provides sealing protection at the connection between adjacent pipe sections. The combination of the positioning and sealing components improves the efficiency of pipe installation and avoids weak points in corrosion protection at pipe section connections, thus meeting the dual requirements of rapid construction and long-term corrosion protection and sealing, thereby improving the construction efficiency and operational safety of gas transmission projects.

[0007] Furthermore, the positioning components include an inner pipe positioning element and an outer pipe positioning element. The inner pipe positioning element includes an inner pipe positioning block and an inner pipe positioning groove. The inner pipe positioning block is fixedly disposed at the end of the inner pipe layer of one section of the pipe unit, and the inner pipe positioning groove is opened at the end of the inner pipe layer of another section of the pipe unit, with the inner pipe positioning block and the inner pipe positioning groove engaging. The outer pipe positioning element includes an outer pipe positioning block and an outer pipe positioning groove. The outer pipe positioning block is fixedly disposed at the end of the outer pipe layer of one section of the pipe unit, and the outer pipe positioning groove is opened at the end of the outer pipe layer of another section of the pipe unit, with the outer pipe positioning block and the outer pipe positioning groove engaging. By setting the inner pipe positioning element and the outer pipe positioning element, and adopting the engaging structure of the inner pipe positioning block and the inner pipe positioning groove, and the outer pipe positioning block and the outer pipe positioning groove, respectively, rapid and accurate alignment of adjacent pipe units on the inner and outer pipe layers is achieved, effectively simplifying the centering adjustment process during connection and improving construction efficiency.

[0008] Furthermore, the inner tube positioning block is a trapezoidal block structure, and the inner tube positioning groove is a trapezoidal groove structure adapted to the inner tube positioning block; the outer tube positioning block is an arc-shaped block structure, and the outer tube positioning groove is an arc-shaped groove structure adapted to the outer tube positioning block. The combined design of the arc-shaped positioning blocks and arc-shaped positioning grooves provides clear guidance during pipe splicing, avoiding misalignment and improving installation efficiency. It is especially suitable for the rapid construction of buried pipelines. Furthermore, its arc-shaped structure generates radial constraint force through curved surface contact, which can effectively resist axial displacement of the pipeline. Its uniform distribution allows the arc-shaped positioning blocks to balance the force in all directions. Even if the force is uneven in some areas, the elastic deformation of the arc-shaped structure can absorb some stress and reduce the risk of joint damage. When the pipes are connected, the trapezoidal positioning blocks are embedded in the trapezoidal positioning grooves to form a "wedge" effect, which significantly enhances the axial pull-out resistance. It is suitable for scenarios that need to withstand longitudinal stress. Moreover, the combination of multiple trapezoidal positioning blocks and trapezoidal positioning grooves can achieve the dual effect of "coarse positioning + fine positioning". First, the blocks are initially aligned by contacting the trapezoidal positioning grooves, and then a tight connection is achieved by the beveled fit, which improves the installation accuracy and stability of the joint.

[0009] Furthermore, both the inner and outer tube layers are rectangular tubular structures. The inner tube positioning block and inner tube positioning groove are located at the center of the side of the inner tube layer, while the outer tube positioning block and outer tube positioning groove are located at the corners of the outer tube layer. By placing the inner tube positioning structure at the center of the side of the rectangular inner tube layer and the outer tube positioning structure at the corners of the rectangular outer tube layer, the structural characteristics of the rectangular tube are fully utilized. This ensures that the outer tube layer can effectively resist torsion during connection, and the rigid support at the corners enhances the overall stability of the connection structure.

[0010] Furthermore, the sealing assembly includes two sealing rings, side locking blocks, a snap-fit ​​base, a clamping plate, and a manual snap-fit. The sealing rings are respectively fixed to the outer pipe layer ends of adjacent pipe units, and the two sealing rings are tightly fitted together. The side locking blocks are disposed on both sides of one of the sealing rings, and the snap-fit ​​base is disposed on both sides of the other sealing ring. One end of the clamping plate is fixedly connected to the snap-fit ​​base, and the other end of the clamping plate is movably connected to the side locking block. The manual snap-fit ​​is rotatably connected to the snap-fit ​​base, and one end of the manual snap-fit ​​has an integrally formed snap-fit ​​head, which abuts against the clamping plate. During use, the operator first connects the clamping plate to the side locking blocks, and then rotates the manual snap-fit, causing it to rotate on the snap-fit ​​base until the snap-fit ​​head abuts against the clamping plate, thereby ensuring a stable connection between the clamping plate and the side locking blocks, and pressing the sealing ring located below the side locking blocks and the snap-fit ​​base to ensure a stable sealing effect. This sealing assembly achieves a basic seal through two tightly fitting sealing rings, and utilizes a mechanical clamping mechanism consisting of a side locking block, a snap-fit ​​base, a clamping plate, and a manual snap-fit. Under the operation of the manual snap-fit, the clamping plate is driven to lock the two side components, thereby applying a continuous and uniform clamping force to the sealing rings. This enables quick installation and reliable sealing at the connection, ensuring corrosion resistance and stability during long-term operation.

[0011] Furthermore, the side locking block has a slot facing the locking piece, and the end of the locking piece has a protrusion that matches the slot, the protrusion being embedded in the slot. This embedded engagement of the protrusion and slot effectively prevents loosening and dislocation at the connection, ensuring a stable and long-lasting clamping force applied by the sealing assembly and improving sealing reliability.

[0012] Furthermore, the snap-fit ​​base and the manual snap-fit ​​are rotatably connected by a pin. The end of the manual snap-fit ​​furthest from the snap-fit ​​head has an operating section, and the outer surface of the operating section has anti-slip textures. The pin enables the rotatable connection between the manual snap-fit ​​and the snap-fit ​​base, and the anti-slip textures on the operating section ensure that the operator can apply force firmly under wet or gloved working conditions, effectively preventing slippage.

[0013] Furthermore, the inner surface of the inner pipe layer is covered with a superhydrophobic coating, and the outer surface of the outer pipe layer is covered with a composite coating. This composite coating comprises, from the inside out, an epoxy resin primer layer, an adhesive layer, and a PE top layer. The strong adhesion of the epoxy resin combined with the chemical corrosion resistance of PE forms a dense anti-corrosion barrier, preventing moisture, microorganisms, and electrolytes in the soil from eroding the outer pipe. This is particularly suitable for highly corrosive soil environments, expanding its applicability. The superhydrophobic coating on the inner surface of the inner pipe layer allows condensate in the gas to form beads and quickly slide off, preventing pipe corrosion or bacterial growth caused by liquid accumulation. It also reduces solid particle adhesion, maintains a smooth inner wall, lowers flow resistance, and ensures long-term gas pipeline transport efficiency.

[0014] Furthermore, the inner surface of the inner pipe layer is also fixedly provided with several trapezoidal pressure-boosting strips extending along the length direction. These trapezoidal pressure-boosting strips are evenly distributed circumferentially along the inner pipe layer. The two ends of each trapezoidal pressure-boosting strip are streamlined, and the middle portion bulges towards the center of the inner pipe layer. The streamlined ends and the relatively high middle portion bulging inwards enhance the turbulence of the gas flow during gas transportation, increasing local pressure while maintaining a constant pipe diameter. This improves the pressure attenuation problem during long-distance transportation and also helps to evenly distribute the airflow and reduce eddy current generation.

[0015] Furthermore, the outer surface of the outer pipe layer is fitted with several uniformly distributed reinforcing rings, and the outer surface of the outer pipe layer is also provided with several reinforcing ribs uniformly distributed along its length, the reinforcing ribs being connected to the reinforcing rings. The combination of reinforcing rings and reinforcing ribs can form a mesh support structure, dispersing external stress, avoiding localized stress concentration, significantly improving the circumferential strength and compressive strength of the pipeline, and preventing pipeline deformation or rupture caused by external loads.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting up positioning and sealing components, the pipe unit can be quickly aligned and sealed, avoiding the cumbersome process of traditional electrofusion welding and significantly improving construction efficiency. 2. A superhydrophobic coating is applied to the inner tube layer and a composite coating is applied to the outer tube layer. A stable seal is achieved at the connection point through a sealing ring and a compression structure, ensuring that the connection point and the tube body have continuous and durable anti-corrosion performance and eliminating weak points for corrosion. 3. By setting trapezoidal pressure boosting strips in the inner pipe layer, the gas flow state can be optimized, reducing turbulence and resistance; at the same time, the reinforcing rings and reinforcing ribs in the outer pipe layer improve the overall rigidity and pressure resistance of the pipe, extend its service life, and make it suitable for complex buried environments. Attached Figure Description

[0017] Figure 1A schematic diagram of the structure of corrosion-resistant PE gas pipes; Figure 2 This is a schematic diagram showing the connection status of corrosion-resistant PE gas pipes. Figure 3 This is a structural schematic diagram of a pipe unit; Figure 4 This is the front view of the pipe unit; Figure 5 This is a schematic diagram of a manually operated snap fastener.

[0018] In the attached diagram: 100, inner tube layer; 110, trapezoidal pressure bar; 200, outer tube layer; 210, reinforcing ring; 220, reinforcing rib; 300, positioning assembly; 310, inner tube positioning component; 311, inner tube positioning block; 312, inner tube positioning groove; 320, outer tube positioning component; 321, outer tube positioning block; 322, outer tube positioning groove; 400, sealing assembly; 410, sealing ring; 420, side locking block; 421, locking groove; 430, snap-fit ​​base; 440, locking piece; 441, locking protrusion; 450, manual snap-fit; 451, snap-fit ​​head; 452, operating part. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0020] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] Example 1 This embodiment is a first embodiment of corrosion-resistant PE gas pipe, including at least two pipe units. Each pipe unit has an inner pipe layer 100 and an outer pipe layer 200 arranged sequentially from the inside to the outside. A connection structure is provided between two adjacent pipe units. The connection structure includes a positioning component 300 and a sealing component 400. The positioning component 300 is respectively disposed at the end of the inner pipe layer 100 and the end of the outer pipe layer 200 of the two adjacent pipe units. The sealing component 400 is sleeved on the outer pipe layer 200 of the two adjacent pipe units, and the inner side of the sealing component 400 is in contact with the outer surface of the outer pipe layer 200.

[0022] like Figure 1 As shown, the corrosion-resistant PE gas pipe of this invention, during installation, firstly uses positioning components 300 located at the ends of the inner pipe layer 100 and the outer pipe layer 200 to assist in the rapid alignment of adjacent pipe sections; during use, a sealing component 400 sleeved on the outer pipe layer 200 seals and protects the connection between adjacent pipe sections. The positioning component 300 and the sealing component 400 work together to improve the efficiency of pipe installation and avoid weak points in corrosion protection at pipe section connections, thus meeting the dual requirements of rapid construction and long-term corrosion protection and sealing, improving the construction efficiency and operational safety of gas transmission projects.

[0023] like Figure 3 , Figure 4 As shown, the positioning component 300 includes an inner tube positioning component 310 and an outer tube positioning component 320. The inner tube positioning component 310 includes an inner tube positioning block 311 and an inner tube positioning groove 312. The inner tube positioning block 311 is fixedly disposed at the end of the inner tube layer 100 of one section of the pipe unit, and the inner tube positioning groove 312 is opened at the end of the inner tube layer 100 of another section of the pipe unit. The inner tube positioning block 311 and the inner tube positioning groove 312 are engaged. The outer tube positioning component 320 includes an outer tube positioning block 321 and an outer tube positioning groove 322. The outer tube positioning block 321 is fixedly disposed at the end of the outer tube layer 200 of one section of the pipe unit, and the outer tube positioning groove 322 is opened at the end of the outer tube layer 200 of another section of the pipe unit. The outer tube positioning block 321 and the outer tube positioning groove 322 are engaged. By setting up inner pipe positioning component 310 and outer pipe positioning component 320, and adopting a snap-fit ​​structure of inner pipe positioning block 311 and inner pipe positioning groove 312, and outer pipe positioning block 321 and outer pipe positioning groove 322 respectively, the rapid and accurate alignment of adjacent pipe units on inner pipe layer 100 and outer pipe layer 200 is realized, which effectively simplifies the centering adjustment process during connection and improves construction efficiency.

[0024] like Figure 2 , Figure 3As shown, the inner tube positioning block 311 is a trapezoidal block structure, and the inner tube positioning groove 312 is a trapezoidal groove structure adapted to the inner tube positioning block 311; the outer tube positioning block 321 is an arc-shaped block structure, and the outer tube positioning groove 322 is an arc-shaped groove structure adapted to the outer tube positioning block 321. The combined design of the arc-shaped positioning blocks and arc-shaped positioning grooves provides clear guidance during pipe splicing, avoiding misalignment and improving installation efficiency. It is especially suitable for the rapid construction of buried pipelines. Furthermore, its arc-shaped structure generates radial constraint force through curved surface contact, which can effectively resist axial displacement of the pipeline. Its uniform distribution allows the arc-shaped positioning blocks to balance the force in all directions. Even if the force is uneven in some areas, the elastic deformation of the arc-shaped structure can absorb some stress and reduce the risk of joint damage. When the pipes are connected, the trapezoidal positioning blocks are embedded in the trapezoidal positioning grooves to form a "wedge" effect, which significantly enhances the axial pull-out resistance. It is suitable for scenarios that need to withstand longitudinal stress. Moreover, the combination of multiple trapezoidal positioning blocks and trapezoidal positioning grooves can achieve the dual effect of "coarse positioning + fine positioning". First, the blocks are initially aligned by contacting the trapezoidal positioning grooves, and then a tight connection is achieved by the beveled fit, which improves the installation accuracy and stability of the joint.

[0025] Both the inner tube layer 100 and the outer tube layer 200 are rectangular tubular structures. The inner tube positioning block 311 and the inner tube positioning groove 312 are located at the center of the side of the inner tube layer 100, while the outer tube positioning block 321 and the outer tube positioning groove 322 are located at the corners of the outer tube layer 200. By placing the inner tube positioning structure at the center of the side of the rectangular inner tube layer 100 and the outer tube positioning structure at the corners of the rectangular outer tube layer 200, the structural characteristics of the rectangular tube are fully utilized. This ensures that the outer tube layer 200 can effectively resist torsion during connection, and the rigid support at the corners enhances the overall stability of the connection structure.

[0026] like Figure 1 As shown, the outer surface of the outer pipe layer 200 is fitted with several uniformly distributed reinforcing rings 210, and the outer surface of the outer pipe layer 200 is also provided with several reinforcing ribs 220 uniformly distributed along its length. The reinforcing ribs 220 are connected to the reinforcing rings 210. The combination of the reinforcing rings 210 and the reinforcing ribs 220 can form a mesh support structure, disperse external stress, avoid local stress concentration, significantly improve the circumferential strength and compressive strength of the pipeline, and prevent pipeline deformation or rupture caused by external loads.

[0027] Example 2 This embodiment is a second embodiment of corrosion-resistant PE gas pipe. This embodiment is similar to the first embodiment, except that, as Figure 3As shown, the sealing assembly 400 includes two sealing rings 410, a side locking block 420, a snap-fit ​​base 430, a clamping piece 440, and a manual snap-fit ​​450. The sealing rings 410 are respectively fixed to the ends of the outer pipe layers 200 of adjacent pipe units, and the two sealing rings 410 are tightly fitted together. The side locking block 420 is disposed on both sides of one of the sealing rings 410, and the snap-fit ​​base 430 is disposed on both sides of the other sealing ring 410. One end of the clamping piece 440 is fixedly connected to the snap-fit ​​base 430, and the other end of the clamping piece 440 is movably connected to the side locking block 420. The manual snap-fit ​​450 is rotatably connected to the snap-fit ​​base 430, and one end of the manual snap-fit ​​450 is provided with an integrally formed snap-fit ​​head 451, which abuts against the clamping piece 440. During use, the operator first connects the clamping plate 440 to the side clamping block 420, then rotates the manual snap fastener 450, causing it to rotate on the snap fastener base 430 until the snap fastener head 451 abuts against the clamping plate 440. This stabilizes the connection between the clamping plate 440 and the side clamping block 420, pressing the sealing ring 410 located below the side clamping block 420 and the snap fastener base 430, ensuring a stable sealing effect. This sealing assembly 400 achieves a basic seal through two tightly fitting sealing rings 410. Utilizing the mechanical clamping mechanism comprised of the side clamping block 420, the snap fastener base 430, the clamping plate 440, and the manual snap fastener 450, the clamping plate 440 is driven by the manual snap fastener 450 to lock the components on both sides, thereby applying a continuous and uniform clamping force to the sealing ring 410. This achieves rapid installation and reliable sealing at the connection point, ensuring corrosion resistance and stability during long-term operation.

[0028] In this embodiment, both the side locking block 420 and the snap-fit ​​base 430 are detachably connected to the pipe. Quick disassembly structures such as snap-fits can be used. The bottom is provided with a sealing ring 410 mounting groove. During installation, the sealing ring 410 is first put on the outer pipe layer 200, and then the side locking block 420 and the snap-fit ​​base 430 are installed to press the sealing ring 410 tightly.

[0029] The side locking block 420 has a slot 421 on the side facing the locking piece 440, and the end of the locking piece 440 has a protrusion 441 that matches the slot 421. The protrusion 441 is embedded in the slot 421. Through the embedded engagement of the protrusion 441 and the slot 421, loosening and dislocation at the connection are effectively prevented, ensuring that the clamping force applied by the sealing assembly 400 is stable and durable, and improving the reliability of the seal.

[0030] like Figure 5As shown, the snap-fit ​​base 430 and the manual snap-fit ​​450 are rotatably connected by a pin. The manual snap-fit ​​450 has an operating part 452 at the end furthest from the snap-fit ​​head 451, and the outer surface of the operating part 452 has anti-slip textures. The pin enables the rotatable connection between the manual snap-fit ​​450 and the snap-fit ​​base 430, and the anti-slip textures on the operating part 452 ensure that the operator can apply force firmly under wet or gloved working conditions, effectively preventing slippage.

[0031] Example 3 This embodiment is the third embodiment of corrosion-resistant PE gas pipe. Similar to Embodiment 1, the difference lies in that the inner surface of the inner pipe layer 100 is covered with a superhydrophobic coating, and the outer surface of the outer pipe layer 200 is covered with a composite coating. The composite coating includes, from the inside out, an epoxy resin primer layer, an adhesive layer, and a PE surface layer. The strong adhesion of the epoxy resin combined with the chemical corrosion resistance of PE forms a dense anti-corrosion barrier, preventing moisture, microorganisms, and electrolytes in the soil from eroding the outer pipe. This is particularly suitable for highly corrosive soil environments, expanding its applicability. The superhydrophobic coating on the inner surface of the inner pipe layer 100 allows condensate in the gas to form beads and quickly slide off, preventing pipe corrosion or bacterial growth caused by liquid accumulation. It also reduces solid particle adhesion, maintains a smooth inner wall, lowers flow resistance, and maintains the long-term gas pipe transport efficiency.

[0032] like Figure 1 , Figure 2 As shown, several trapezoidal pressure-boosting strips 110 extending along the length direction are fixedly installed on the inner surface of the inner pipe layer 100. The trapezoidal pressure-boosting strips 110 are evenly distributed circumferentially around the inner pipe layer 100. The two ends of the trapezoidal pressure-boosting strips 110 are streamlined, and the middle part of the trapezoidal pressure-boosting strips 110 protrudes towards the center of the inner pipe layer 100. Both ends of the trapezoidal pressure-boosting strips are streamlined, and the middle part is relatively high, protruding into the pipe. When transporting gas, it can increase the turbulence of the gas flow through the turbulence effect, increase the local pressure without changing the pipe diameter, improve the pressure attenuation problem in long-distance transportation, and at the same time help to evenly distribute the airflow and reduce the generation of eddies.

[0033] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0034] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A corrosion-resistant PE gas pipe, characterized in that, It includes at least two pipe units, each of which has an inner pipe layer (100) and an outer pipe layer (200) arranged sequentially from the inside to the outside; a connection structure is provided between two adjacent pipe units, the connection structure including a positioning component (300) and a sealing component (400); the positioning component (300) is respectively disposed at the end of the inner pipe layer (100) and the end of the outer pipe layer (200) of the two adjacent pipe units; the sealing component (400) is sleeved on the outer pipe layer (200) of the two adjacent pipe units, and the inner side of the sealing component (400) is in contact with the outer surface of the outer pipe layer (200).

2. The corrosion-resistant PE gas pipe according to claim 1, characterized in that, The positioning component (300) includes an inner tube positioning element (310) and an outer tube positioning element (320); the inner tube positioning element (310) includes an inner tube positioning block (311) and an inner tube positioning groove (312), the inner tube positioning block (311) is fixedly disposed at the end of the inner tube layer (100) of one section of the pipe unit, and the inner tube positioning groove (312) is opened at the end of the inner tube layer (100) of another section of the pipe unit, and the inner tube positioning block (311) is fixedly disposed at the end of the inner tube layer (100) of the other section of the pipe unit, and the inner tube positioning block (311) is fixedly disposed at the end of the inner tube layer (100) of the other section of the pipe unit, and the inner tube positioning block (311) is fixedly disposed at the end of the inner tube layer (100) of the other section of the pipe unit, and the inner tube positioning block (311) is fixedly disposed at the end of the inner tube layer (100) of the other section of the pipe unit, and the inner tube positioning block (311) is fixedly disposed at the end of the inner tube layer (100) of the other section of the pipe unit, and the inner tube positioning groove (312 ... groove (312) is fixedly disposed at the end of the inner tube layer (100) of the pipe unit, and the inner tube positioning groove (312) is fixedly disposed at the end of the inner tube layer (100) of the pipe unit, and the inner tube positioning groove (312) is fixedly disposed at the end 11) Engages with the inner tube positioning groove (312); the outer tube positioning component (320) includes an outer tube positioning block (321) and an outer tube positioning groove (322). The outer tube positioning block (321) is fixedly disposed at the end of the outer tube layer (200) of one section of the pipe unit, and the outer tube positioning groove (322) is opened at the end of the outer tube layer (200) of another section of the pipe unit, and the outer tube positioning block (321) engages with the outer tube positioning groove (322).

3. The corrosion-resistant PE gas pipe according to claim 2, characterized in that, The inner tube positioning block (311) is a trapezoidal block structure, and the inner tube positioning groove (312) is a trapezoidal groove structure adapted to the inner tube positioning block (311); the outer tube positioning block (321) is an arc-shaped block structure, and the outer tube positioning groove (322) is an arc-shaped groove structure adapted to the outer tube positioning block (321).

4. The corrosion-resistant PE gas pipe according to claim 2, characterized in that, Both the inner tube layer (100) and the outer tube layer (200) are rectangular tubular structures. The inner tube positioning block (311) and the inner tube positioning groove (312) are located at the center of the side of the inner tube layer (100), and the outer tube positioning block (321) and the outer tube positioning groove (322) are located at the corner of the outer tube layer (200).

5. The corrosion-resistant PE gas pipe according to claim 1, characterized in that, The sealing assembly (400) includes two sealing rings (410), a side locking block (420), a snap-fit ​​base (430), a clamping piece (440), and a manual snap-fit ​​(450). The sealing rings (410) are respectively fixed to the ends of the outer tube layers (200) of adjacent tube units, and the two sealing rings (410) are tightly fitted together. The side locking block (420) is detachably connected to the outer tube layer (200) and is disposed on both sides of one of the sealing rings (410). The snap-fit ​​base (430)... The clamping piece (440) is detachably connected to the outer tube layer (200) and is disposed on both sides of another sealing ring (410); one end of the clamping piece (440) is fixedly connected to the snap-fit ​​base (430), and the other end of the clamping piece (440) is movably connected to the side snap-fit ​​block (420); the manual snap-fit ​​(450) is rotatably connected to the snap-fit ​​base (430), and one end of the manual snap-fit ​​(450) is provided with an integrally formed snap-fit ​​head (451), and the snap-fit ​​head (451) abuts against the clamping piece (440).

6. The corrosion-resistant PE gas pipe according to claim 5, characterized in that, The side locking block (420) has a slot (421) on the side facing the locking piece (440), and the end of the locking piece (440) has a protrusion (441) that matches the slot (421), and the protrusion (441) is embedded in the slot (421).

7. The corrosion-resistant PE gas pipe according to claim 5, characterized in that, The snap-on base (430) and the manual snap-on (450) are rotatably connected by a pin. The manual snap-on (450) has an operating part (452) at the end away from the snap-on head (451). The outer surface of the operating part (452) is provided with anti-slip texture.

8. A corrosion-resistant PE gas pipe according to any one of claims 1 to 7, characterized in that, The inner surface of the inner tube layer (100) is covered with a superhydrophobic coating, and the outer surface of the outer tube layer (200) is covered with a composite coating, which includes an epoxy resin primer layer, an adhesive layer and a PE surface layer arranged sequentially from the inside to the outside.

9. A corrosion-resistant PE gas pipe according to any one of claims 1 to 7, characterized in that, The inner surface of the inner tube layer (100) is also fixedly provided with a plurality of trapezoidal pressure boosting strips (110) extending along the length direction. The trapezoidal pressure boosting strips (110) are evenly distributed around the inner tube layer (100). The two ends of the trapezoidal pressure boosting strips (110) are streamlined, and the middle part of the trapezoidal pressure boosting strips (110) protrudes towards the center of the inner tube layer (100).

10. A corrosion-resistant PE gas pipe according to any one of claims 1 to 7, characterized in that, The outer surface of the outer tube layer (200) is provided with a plurality of uniformly distributed reinforcing rings (210), and the outer surface of the outer tube layer (200) is also provided with a plurality of uniformly distributed reinforcing ribs (220) along its length direction, and the reinforcing ribs (220) are connected to the reinforcing rings (210).

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