Protective water supply buried polyethylene pipe group
By introducing an adjustment structure and a bellows-pipe sealing design into the protective buried polyethylene water supply pipe assembly, the problem of gaps in anti-corrosion buried insulated pipes under dynamic environments is solved, thereby improving the stability and protection of the pipe connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG BINGAO PIPELINE TECH CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-05-15
AI Technical Summary
Existing anti-corrosion buried insulation pipes are prone to developing gaps due to slight deformation in dynamic environments, resulting in a decrease in anti-corrosion and waterproof performance and an inability to adapt to long-term changes in the buried environment.
By introducing an adjustment structure into the protective buried polyethylene pipe assembly for water supply, and using the combination of pressure plates and fixing bolts, continuous and uniform pressure is provided to counteract the loosening tendency caused by water flow impact and vibration. Furthermore, the transmission components are sealed by a bellows pipe to prevent the intrusion of external impurities.
It effectively prevents the fixing bolts from loosening, reduces the risk of leakage, ensures stable pipe connections, extends service life, improves protection, and adapts to dynamic environmental changes.
Smart Images
Figure CN224245712U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water supply engineering technology, specifically a protective buried polyethylene pipe assembly for water supply. Background Technology
[0002] Since water supply pipes are usually located outdoors and buried underground, they are greatly affected by external environmental factors. Polyethylene (PE) pipes, with their high strength, corrosion resistance, and non-toxicity, are widely used in the water supply pipe manufacturing industry. Compared with traditional steel pipes and polyvinyl chloride (PVC) water pipes, PE pipes are lighter, easier to install and move, and are gradually becoming the preferred material for water supply pipeline laying.
[0003] Chinese Patent Announcement No. CN212643782U discloses a corrosion-resistant buried insulated pipe, relating to the field of insulated pipe technology. The pipe body includes a pipe body with, from the inside out, an anti-corrosion layer, a waterproof layer, a polyurethane insulation layer, a high-density polyethylene protective layer, and a rubber buffer layer. The high-density polyethylene protective layer and the rubber buffer layer form a first notch, and the waterproof layer and the polyurethane insulation layer form a second notch. Protective sleeves are provided on both sides of the pipe body. This invention reduces corrosion caused by burial by applying anti-corrosion and waterproof coatings to the surface of the pipe body. It utilizes the insulation and protective layers for protection and secondary corrosion and waterproofing, and the rubber buffer layer reduces the impact of vibration on the pipe body. Furthermore, the protective sleeves are rotated so that the first cavity is threadedly connected to the first notch, and the second notch presses against the first and second sealing rings, ensuring a tight fit between the protective sleeves and the pipe body, thus reducing external impact on the insulation layer.
[0004] In the existing technology, during the use of a corrosion-resistant buried thermal insulation pipe, its corrosion resistance and waterproofing mainly rely on the static superposition of multiple layers of coatings and structures. When the pipe body undergoes micro-deformation due to foundation settlement, temperature changes, etc., gaps are easily generated between the various structural layers, which cannot be repaired by themselves. Over time, the corrosion resistance and waterproofing effect will gradually decrease, making it difficult to adapt to long-term dynamic changes in the buried environment. Therefore, we have made improvements to this and proposed a protective buried polyethylene pipe assembly for water supply. Utility Model Content
[0005] The purpose of this utility model is to address the problem that the static structure of a current type of anti-corrosion buried insulation pipe is prone to failure under dynamic environments.
[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:
[0007] A protective buried polyethylene pipe assembly for water supply uses an adjustable structure to allow the pressure plate to provide continuous and uniform pressure to the fixing bolts on the flange. This active adjustment mechanism can cope with changes caused by water flow impact and vibration during water transportation, effectively counteracting the loosening tendency of the bolts and avoiding problems caused by the static structure's inability to adapt to dynamic changes, thus improving the aforementioned issues.
[0008] The application is as follows:
[0009] A protective buried polyethylene pipe assembly for water supply includes an inner layer pipe, an intermediate layer fiber pipe fixedly installed on the outer side of the inner layer pipe, an outer layer pipe fixedly installed on the outer side of the intermediate layer fiber pipe, and a shell provided on the outer side of the outer layer pipe. Bases are fixedly installed on the outer side of the inner layer pipe and on corresponding sides of the shell. Pressure plates are slidably connected to the outer side of the inner layer pipe on the sides of the two bases that are far apart from each other. An adjustment structure is provided on each of the two bases. The adjustment structure includes an internal gear ring and two gears. The internal gear ring meshes with the two gears and is slidably connected to the base. A fixing rod is fixedly installed on one side of one of the gears. The fixing rod and the two gears are rotatably connected to the base. T-shaped threaded rods are fixedly installed on one side of each of the two gears. Both T-shaped threaded rods pass through one side of the base and are rotatably connected to it. T-shaped connecting rods are threadedly connected to the outer side of each of the two T-shaped threaded rods. Both T-shaped connecting rods are inserted into the pressure plate and are rotatably connected to it.
[0010] As a preferred technical solution of this application, both of the bases are rotatably connected to a worm gear and a worm, the worm gear and the worm mesh, the worm gear is fixedly connected to a fixed rod, a handle is fixedly installed on one side of the worm, and the handle passes through one side of the base and is rotatably connected to it, and a sealing ring is embedded on the base and at the junction of the base and the handle;
[0011] As a preferred technical solution of this application, rubber pads are fixedly installed on the sides of the two pressure plates that are far apart from each other, and sealing rings are embedded on the inner and outer sides of the interfaces at both ends of the outer pipe;
[0012] As a preferred technical solution of this application, a protective coating is provided on the outer side of the outer shell;
[0013] As a preferred technical solution of this application, a bellows pipe is fixedly installed on the side of each of the two bases that is far apart from each other, and the end of each of the two bellows pipes that is far away from the base is fixedly connected to two pressure plates respectively.
[0014] As a preferred technical solution of this application, flanges are fixedly installed at both ends of the outer layer pipe, and spiral guide grooves are opened on both sides of the inner wall of the inner layer pipe.
[0015] As a preferred technical solution of this application, a card box is fixedly installed on one side of one of the bases, and multiple side ears are fixedly installed on the outer sides of both bases, and fixing holes are opened on the multiple side ears;
[0016] As a preferred technical solution of this application, a T-shaped arc plate is fixedly installed at the bottom of one of the flanges. Humidity sensors are embedded on the top of the T-shaped arc plate and on the corresponding sides of the flange. The top of the T-shaped arc plate is inclined. A control module is provided inside the T-shaped arc plate. The control module is electrically connected to the two humidity sensors.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] In the scheme of this application:
[0019] (1) By adjusting the structure through the pressure plate, the fixing bolts on the flange are provided with continuous and uniform pressure, which effectively counteracts the loosening tendency caused by water flow impact and vibration during pipeline water transportation, avoids the fixing bolts from loosening due to long-term uneven force or vibration, ensures the tightness of the flange connection, greatly reduces the risk of leakage caused by loose bolts at the interface, and ensures the stable operation of the pipeline water transportation system.
[0020] (2) The bellows pipe can form a closed protection for components such as T-shaped threaded rods and T-shaped connecting rods in the regulating structure. Since the pipe is buried underground, mud, water, corrosive substances in the soil can easily invade the regulating structure. The bellows pipe can flexibly extend and retract with the sliding of the pressure plate, always wrapping the transmission components, effectively blocking external impurities from entering, avoiding problems such as jamming and corrosion of components due to pollution, ensuring the smooth operation of the regulating structure and extending its service life. Attached Figure Description
[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0022] Figure 2 This is a schematic diagram of the combined structure of this utility model;
[0023] Figure 3 This is a front sectional view of the present invention.
[0024] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;
[0025] Figure 5 This utility model Figure 3 Enlarged view at point B in the middle;
[0026] Figure 6 This is a schematic diagram of the adjustment structure of this utility model.
[0027] Explanation of reference numerals in the instruction manual: 1. Inner layer pipe; 2. Middle layer fiber pipe; 3. Outer layer pipe; 4. Outer shell; 5. Protective coating; 6. Base; 7. Pressure plate; 8. Flange; 9. T-shaped arc plate; 10. Humidity sensor; 11. T-shaped threaded rod; 12. T-shaped connecting rod; 13. Gear; 14. Internal gear ring; 15. Fixing rod; 16. Worm gear; 17. Worm; 18. Organ tube; 19. Side ear; 20. Control module; 21. Card box. Detailed Implementation
[0028] The present invention will be further described in detail below with reference to the accompanying drawings.
[0029] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.
[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 utility model according to the specific circumstances.
[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0034] Example 1: Please refer to the appendix of the instruction manual. Figure 1-6 A protective buried polyethylene pipe assembly for water supply includes an inner pipe 1, an intermediate fiber pipe 2 fixedly installed on the outside of the inner pipe 1, an outer pipe 3 fixedly installed on the outside of the intermediate fiber pipe 2, a shell 4 on the outside of the outer pipe 3, bases 6 fixedly installed on the corresponding sides of the inner pipe 1 and opposite to the shell 4, and pressure plates 7 slidably connected to the sides of the inner pipe 1 and opposite to each other on the sides of the two bases 6. Each base 6 is provided with an adjustment structure, which includes an internal gear ring 14 and two gears. 13. The internal gear ring 14 meshes with two gears 13. The internal gear ring 14 is slidably connected to the base 6. A fixing rod 15 is fixedly installed on one side of one of the gears 13. The fixing rod 15 and the two gears 13 are rotatably connected to the base 6. A T-shaped threaded rod 11 is fixedly installed on one side of each of the two gears 13. The two T-shaped threaded rods 11 pass through one side of the base 6 and are rotatably connected to it. A T-shaped connecting rod 12 is threaded to the outside of each of the two T-shaped threaded rods 11. The two T-shaped connecting rods 12 are inserted into the inside of the pressure plate 7 and are rotatably connected to it.
[0035] In this embodiment of the utility model, the inner pipe 1 serves as the core channel for water transmission, directly undertaking the task of water flow transportation. It is made of food-grade PE material with good corrosion resistance and hygiene properties. This material selection ensures from the source that the transported water quality is not polluted, meets the core requirements of the water supply system for water quality safety, and provides a basic guarantee for the health of residents' drinking water.
[0036] The intermediate fiber duct 2, which is fixedly installed on the outside of the inner pipe 1, is made of high-strength fiber reinforcement materials such as glass fiber and carbon fiber. With the excellent high tensile strength of the fiber materials, it is tightly combined with the inner pipe 1 to form a tensile and impact-resistant reinforcement layer. When the pipe is subjected to external soil pressure, geological subsidence, or internal water flow impact, the intermediate fiber duct 2 can effectively disperse these forces, greatly reducing the risk of pipe rupture or deformation due to excessive stress, and significantly enhancing the structural stability of the pipe.
[0037] The outer layer pipe 3, located outside the intermediate fiber pipe 2, is made of high-density polyethylene. Through its fixed connection with the intermediate layer, the outer layer pipe 3 further enhances the pipe's pressure resistance, enabling the entire pipe assembly to withstand higher internal water pressure and external environmental pressure. Simultaneously, the sealing structure design of the outer layer pipe 3 effectively reduces the possibility of water seepage from the inner or intermediate layers, adding another layer of protection to the water transport process.
[0038] The outer shell 4 of the outer pipe 3 is a rigid protective shell made of special PE material with UV resistance, aging resistance and wear resistance. The outer shell 4 is in direct contact with soil, sand and gravel in the buried environment, forming a strong physical barrier that can block soil particles from directly rubbing against the internal multi-layer pipes, resist the impact of external hard objects, and resist the erosion of environmental factors such as ultraviolet radiation and soil corrosion, so as to protect the internal pipe structure to the maximum extent and extend the service life of the entire pipe group.
[0039] The bases 6 located on both sides of the outer shell 4 outside the inner pipe 1 serve as the installation foundation for the adjustment structure, providing support for subsequent fixed adjustment. The pressure plate 7 slidably connected to the outer side of the base 6 can move along the pipe axis under the action of the adjustment structure, thereby squeezing and fixing the fixing bolts used on the flange 8 when multiple pipes are combined. In the adjustment structure, the internal gear ring 14 meshes with two gears 13. When one of the gears 13 rotates under the drive of the fixed rod 15, the internal gear ring 14 rotates accordingly and drives the other gear 13 to rotate synchronously, ensuring the coordinated action of the two gears 13. When the gear 13 rotates, the T-shaped threaded rod 11 on one side rotates synchronously. Since the T-shaped threaded rod 11 is threadedly connected to the T-shaped connecting rod 12, and the T-shaped connecting rod 12 is rotatably connected to the pressure plate 7, the threaded transmission will be converted into the axial movement of the T-shaped connecting rod 12, thereby driving the pressure plate 7 to slide.
[0040] In this embodiment of the utility model, regarding the tightening effect of the fixing bolts, the pressure plate 7 achieves compression of the fixing bolts through the driving of the adjustment structure, which can provide continuous and uniform pressure to the bolts, effectively counteracting the loosening tendency caused by water flow impact and vibration during water transportation, and preventing the fixing bolts from loosening due to long-term uneven force or vibration, thereby ensuring the tightness of the flange 8 connection, greatly reducing the risk of interface leakage caused by bolt loosening, and ensuring the stability of the pipeline water transportation system.
[0041] Meanwhile, the squeezing action of the pressure plate 7 can reduce the external stress directly borne by the bolt. In buried environments, external forces such as soil settlement and squeezing are easily transmitted to the bolt through the pipeline. The pressure plate 7 can disperse some of the external forces, reduce the probability of bolt fatigue damage, extend the service life of the bolt, and reduce the maintenance cost of frequent replacement due to bolt damage.
[0042] Example 2: Please refer to the appendix of the instruction manual. Figure 1-6In a preferred embodiment of this utility model, worm gears 16 and worms 17 are rotatably connected inside both bases 6. The worm gears 16 and worms 17 mesh with each other. The worm gears 16 are fixedly connected to the fixed rod 15. A handle is fixedly installed on one side of the worm 17, and the handle passes through one side of the base 6 and is rotatably connected to it. A sealing ring is embedded on the base 6 at the junction of the base 6 and the handle.
[0043] Rubber pads are fixedly installed on the sides of the two pressure plates 7 that are far apart from each other, and sealing rings are embedded on the inner and outer sides of the interfaces at both ends of the outer pipe 3.
[0044] A protective coating 5 is provided on the outer side of the outer casing 4.
[0045] Organ pipes 18 are fixedly installed on the opposite sides of the two bases 6, and the ends of the two organ pipes 18 away from the bases 6 are fixedly connected to the two pressure plates 7 respectively.
[0046] Flanges 8 are fixedly installed at both ends of the outer pipe 3, and spiral guide grooves are opened on both sides of the inner wall of the inner pipe 1.
[0047] A card box 21 is fixedly installed on one side of one of the bases 6, and multiple side ears 19 are fixedly installed on the outer side of both bases 6, and each of the multiple side ears 19 has a fixing hole.
[0048] A T-shaped arc plate 9 is fixedly installed at the bottom of one of the flanges 8. Humidity sensors 10 are embedded on the top of the T-shaped arc plate 9 and on the corresponding sides of the flange 8. The top of the T-shaped arc plate 9 is inclined. A control module 20 is installed inside the T-shaped arc plate 9. The control module 20 is electrically connected to the two humidity sensors 10.
[0049] In this embodiment of the utility model, the worm wheel 16 and worm 17 inside the base 6 constitute a speed reduction transmission mechanism. The worm wheel 16 is fixedly connected to the fixed rod 15. The handle on one side of the worm 17 extends to the outside of the base 6 for easy manual operation. When the handle is turned, the worm 17 rotates and drives the meshing worm wheel 16 to rotate. Since the transmission of the worm wheel 16 and worm 17 has a self-locking characteristic, it can maintain its current position after stopping rotation, preventing the adjusted pressure plate 7 from being displaced due to external force. The rotation of the worm wheel 16 drives the fixed rod 15 to rotate, thereby triggering the gear 13 transmission system of the adjustment structure.
[0050] The sealing ring at the junction of the base 6 and the handle can prevent moisture and mud from entering the base and avoid components such as the worm gear 16, worm 17 and gear 13 from jamming or rusting due to contamination.
[0051] The rubber pad on the outside of the pressure plate 7 utilizes the elastic deformation characteristics of rubber material to increase the friction with the fixing bolt when the pressure plate 7 is squeezed and fixed. At the same time, it avoids wear caused by direct contact between the hard pressure plate 7 and the fixing bolt, and can also buffer the impact force transmitted by pipeline vibration.
[0052] The sealing rings on the inner and outer sides of the interfaces at both ends of the outer pipe 3 are made of aging-resistant rubber. When the pipe is connected, the sealing rings are deformed by the tightening force of the flange 8, tightly fitting the interface surface and forming a double sealing barrier to prevent water from leaking from the interface. The double sealing ring design greatly improves the sealing performance of the pipe interface. Even if the inner sealing ring leaks a little due to long-term use, the outer sealing ring can still play a protective role, reducing water waste and the risk of soil pollution.
[0053] The protective coating 5 on the outer side of the outer shell 4 is made of a mixture of anti-corrosion paint, wear-resistant pigment and curing agent. It is evenly attached to the surface of the outer shell 4 by spraying process to form a dense protective film. This coating can isolate the corrosive ions and moisture in the soil from direct contact with the outer shell 4, while resisting the friction and wear of soil particles and slowing down the aging rate of the outer shell 4.
[0054] The accordion tube 18 between the base 6 and the pressure plate 7 is made of foldable elastic material and can expand and contract with the sliding of the pressure plate 7. Its two ends are fixedly connected to the base 6 and the pressure plate 7 respectively, forming a closed space that encloses the transmission components such as the T-shaped threaded rod 11 and the T-shaped connecting rod 12. The accordion tube 18 effectively blocks the mud and water in the soil from entering the transmission components, avoids jamming of the threaded connection due to contamination, ensures the smooth operation of the adjustment structure, reduces the risk of corrosion of the transmission components, and improves the reliability and service life of the adjustment structure.
[0055] The flanges 8 at both ends of the outer pipe 3 are connected to the flanges 8 of the adjacent pipes by fixing bolts to achieve rigid fixation between the pipes.
[0056] The spiral guide grooves on both sides of the inner wall of the inner pipe 1 can guide the water flow to form a spiral flow when the water flows through, reducing the direct impact between the water flow and the inner wall of the pipe, reducing water flow resistance and noise generated by turbulence, while reducing the wear of the inner wall of the pipe by the water flow impact and extending the service life of the inner pipe 1.
[0057] The side ears 19 on the outer side of the base 6, through fixing holes and fasteners such as anchor bolts, can fix the pipeline assembly to the ground or concrete foundation, improving the installation stability of the pipeline in complex terrain, reducing pipeline displacement caused by geological activity, and enhancing the overall installation stability of the pipeline.
[0058] The card box 21 can hold information cards such as pipe specifications, installation date, and maintenance records, making it easy for maintenance personnel to quickly obtain relevant pipe parameters.
[0059] The T-shaped arc plate 9 at the bottom of flange 8 has an inclined top that guides condensate or leakage water to the edge, preventing water from accumulating at the flange 8 interface. The humidity sensor 10 embedded in the top monitors the humidity changes around the interface in real time. When the humidity exceeds a preset threshold, the sensor transmits a signal to the control module 20 inside the T-shaped arc plate 9. The control module 20 starts the corresponding processing program. Through the cooperation of the humidity sensor 10 and the control module 20, real-time monitoring of the humidity of the pipe interface is realized, providing data support for early leakage warning, making it easier for maintenance personnel to deal with potential problems in a timely manner and prevent the leakage accident from escalating. At the same time, the external controller is electrically connected to the control module 20, which facilitates remote operation by the staff.
[0060] Example 3: Please refer to the appendix of the instruction manual. Figure 5 In a preferred embodiment of this utility model, two fixing rings are fixedly installed inside the outer shell 4. Multiple buffer springs are fixedly installed on the side of each fixing ring away from the outer shell 4. The ends of the multiple buffer springs away from the fixing rings are fixedly connected to the outer pipe 3. Multiple first heating rods are arranged between the two fixing rings, and the two ends of the heating rods are fixedly connected to the two fixing rings respectively. Multiple second heating rods are fixedly installed on the side of each fixing ring away from each other. The ends of the multiple second heating rods away from the fixing rings are fixedly connected to the outer shell 4. A rubber ring is fixedly installed at the junction of the outer pipe 3 and the outer shell 4. The control module 20 is electrically connected to the multiple first heating rods and second heating rods.
[0061] In this embodiment of the utility model, the fixing ring and buffer spring inside the outer shell 4 absorb the impact force and expansion and contraction stress of the pipe through elastic deformation when the pipe is subjected to external impact or temperature change. This reduces the impact on the main body of the pipe. The first heating rod between the fixing rings and the second heating rod between the fixing rings and the outer shell 4 are activated for heating when abnormal humidity or low temperature is detected around the pipe under the control of the control module 20. This reduces the humidity inside the pipe through heat transfer and prevents the pipe from freezing and cracking.
[0062] In this embodiment of the utility model, the buffer spring effectively buffers external impacts and thermal expansion and contraction stress, protects the main structure of the pipeline, and reduces the risk of pipeline rupture caused by external forces; the heating rod works in abnormal humidity or low temperature environments, which can prevent the pipeline from getting damp and corroding and freezing and cracking in winter, and improve the pipeline's adaptability in harsh environments; the rubber ring enhances the sealing between the outer shell 4 and the outer pipeline 3, ensuring the normal operation of the buffer and heating structure.
[0063] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.
Claims
1. A protective buried polyethylene pipe assembly for water supply, comprising an inner pipe (1), characterized in that, An intermediate fiber duct (2) is fixedly installed on the outside of the inner layer pipe (1), and an outer layer pipe (3) is fixedly installed on the outside of the intermediate layer fiber duct (2). A shell (4) is provided on the outside of the outer layer pipe (3). A base (6) is fixedly installed on the outside of the inner layer pipe (1) and on the corresponding sides of the shell (4). A pressure plate (7) is slidably connected on the outside of the inner layer pipe (1) and on the side of the two bases (6) that are far apart from each other. An adjustment structure is provided on each of the two bases (6). The adjustment structure includes an internal gear ring (14) and two gears (13). The internal gear ring (14) and the two gears (13) are connected to each other. Gears (13) mesh, and the internal gear ring (14) is slidably connected to the base (6). A fixing rod (15) is fixedly installed on one side of one of the gears (13). The fixing rod (15) and the two gears (13) are rotatably connected to the base (6). T-shaped threaded rods (11) are fixedly installed on one side of each of the two gears (13). The two T-shaped threaded rods (11) pass through one side of the base (6) and are rotatably connected to it. T-shaped connecting rods (12) are threaded to the outside of each of the two T-shaped threaded rods (11). The two T-shaped connecting rods (12) are inserted into the inside of the pressure plate (7) and are rotatably connected to it.
2. The protective buried polyethylene pipe assembly for water supply according to claim 1, characterized in that, Both of the bases (6) are rotatably connected to a worm wheel (16) and a worm (17). The worm wheel (16) and the worm (17) mesh with each other. The worm wheel (16) is fixedly connected to a fixed rod (15). A handle is fixedly installed on one side of the worm (17), and the handle passes through one side of the base (6) and is rotatably connected to it. A sealing ring is embedded on the base (6) at the junction of the base (6) and the handle.
3. A protective buried polyethylene pipe assembly for water supply according to claim 1, characterized in that, Rubber pads are fixedly installed on the sides of the two pressure plates (7) that are far apart from each other, and sealing rings are embedded on the inner and outer sides of the interfaces at both ends of the outer pipe (3).
4. A protective buried polyethylene pipe assembly for water supply according to claim 1, characterized in that, The outer side of the outer shell (4) is provided with a protective coating (5).
5. A protective buried polyethylene pipe assembly for water supply according to claim 1, characterized in that, On the two bases (6) that are far apart from each other, there are fixed organs (18) on the side of each base (6), and the ends of the two organs (18) that are far away from the bases (6) are fixedly connected to the two pressure plates (7).
6. A protective buried polyethylene pipe assembly for water supply according to claim 1, characterized in that, Flanges (8) are fixedly installed at both ends of the outer pipe (3), and spiral guide grooves are opened on both sides of the inner wall of the inner pipe (1).
7. A protective buried polyethylene pipe assembly for water supply according to claim 1, characterized in that, A card box (21) is fixedly installed on one side of one of the bases (6), and multiple side ears (19) are fixedly installed on the outer side of both bases (6), and fixing holes are provided on the multiple side ears (19).
8. A protective buried polyethylene pipe assembly for water supply according to claim 6, characterized in that, A T-shaped arc plate (9) is fixedly installed at the bottom of one of the flanges (8). Humidity sensors (10) are embedded on the top of the T-shaped arc plate (9) and on the corresponding sides of the flange (8). The top of the T-shaped arc plate (9) is inclined. A control module (20) is provided inside the T-shaped arc plate (9). The control module (20) is electrically connected to the two humidity sensors (10).