Sediment deposition device and water conveying pipe with same

Abstract

The utility model relates to the field of water conveying pipes, in particular to a sediment deposition device and a water conveying pipe with the sediment deposition device, the sediment deposition device comprises an upper cover and a collecting box, the upper cover is provided with a plurality of water inlets and water outlets, the collecting box is installed below the upper cover, and the water inlets and the water outlets are communicated with the collecting box. Sediment in the water flow is deposited at the bottom of the collecting box through gravity, and the purification effect is achieved; the water conveying pipe comprises pipes and the sediment deposition device, the pipes are communicated with the water inlet and the water outlet, water conveyed by the pipes is purified through the sediment deposition device and then flows into other pipes to be continuously conveyed, and the pipes are prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the field of water pipes, and more particularly to a sediment deposition device and a water pipe having the same. Background Art

[0002] Some regions have complex and variable geological conditions, extremely harsh climates, and high sand content, high salinity, and strong alkalinity in their water quality. Traditional water pipes used in these areas are prone to clogging, wear, aging, and corrosion, which restrict water delivery efficiency, increase maintenance costs, and, in turn, affect the effective use of water resources and sustainable economic development in these areas. Therefore, the development of clogging-resistant, high-performance, and long-life water pipes and accessories for these harsh environments is particularly important and urgent.

[0003] Patent CN217355911U discloses a PVC drainage pipe for sewage treatment, comprising a PVC inner layer, a high-density cross-linked polyethylene layer, a fiber-reinforced layer, and a PVC outer layer, arranged sequentially from the inside out. The inner wall of the PVC inner layer is provided with an anti-corrosion and weather-resistant layer, the high-density cross-linked polyethylene layer is coated on the outer wall of the PVC inner layer, the fiber-reinforced layer is coated on the outer wall of the high-density cross-linked polyethylene layer, and the PVC outer layer is coated on the outer wall of the fiber-reinforced layer. The inner wall of the drainage pipe is provided with a spiral raised ring, and the outer wall of the drainage pipe is provided with an annular fixing ring. With this structural arrangement, the PVC water pipe has strong corrosion resistance and outstanding pressure resistance. However, this solution cannot solve the problem of pipe blockage caused by sediment in the water. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiency of the prior art that the pipeline cannot be prevented from being blocked, and to provide a sediment deposition device and a water delivery pipe having the same, which can remove sediment in the water and avoid pipe blockage.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A sediment deposition device is provided, comprising an upper cover and a collection box, wherein the upper cover is provided with a plurality of water inlets and water outlets, the collection box is installed below the upper cover, and the water inlets, the collection box and the water outlets are connected in sequence.

[0007] In the sediment deposition device of the utility model, water flows into the upper cover through the water inlet and then into the collection box. The water flow velocity decreases, and the sediment carried in the water is deposited to the bottom of the collection box under the action of gravity. After the collection box is filled with water, it flows out through the water outlet, and the heavier sediment in the water remains at the bottom of the collection box, thereby achieving water purification and avoiding clogging of the pipeline.

[0008] Furthermore, the device further includes a lower drain assembly installed in the collection box. The lower drain assembly is provided with a plurality of first lower drain channels, which connect the space above and below the lower drain assembly. The cross-sectional area of the top of the first lower drain channel is larger than the cross-sectional area of the bottom of the first lower drain channel. The first lower drain channels are wider at the top and narrower at the bottom, making it easier for sediment to pass through the lower drain assembly from top to bottom, but more difficult to pass through from bottom to top, thereby preventing sediment from being carried by the water flow and flowing back into the pipe.

[0009] Furthermore, the invention further includes a reverse leakage assembly installed in the collection box and located below the lower leakage assembly. The second lower leakage channel connects the space above and below the reverse leakage assembly. The cross-sectional area of the top of the second lower leakage channel is larger than the cross-sectional area of the bottom. The projection of the bottom of the first lower leakage channel on the reverse leakage assembly is offset from the top of the second lower leakage channel. The offset between the first and second lower leakage channels can further increase the difficulty of sediment backflow.

[0010] Furthermore, the invention further comprises a filter assembly installed in the collection box and located below the anti-leakage assembly. The filter assembly prevents large particles of sediment from reaching the bottom of the collection box, thereby preventing large particles of sediment from hitting the inner wall of the collection box and avoiding damage to the collection box.

[0011] A water delivery pipe is provided, comprising a plurality of pipes and a sediment deposition device as described above installed between the pipes. The pipe for inputting water into the upper cover is connected to the water inlet, and the pipe for discharging water from the upper cover is connected to the water outlet.

[0012] In the water delivery pipe of the utility model, water in the pipe enters the upper cover through the water inlet and flows into the collection box. After the collection box is filled, the water flows into another pipe. The sediment in the water is deposited at the bottom of the collection box by gravity, thereby purifying the water flow and avoiding clogging of the pipe.

[0013] Furthermore, the inner wall of the pipe is provided with a spiral structure. The spiral structure can change the direction of water flow, causing the water flow to rotate along the inner wall of the pipe, generating centrifugal force on the sediment. The sediment is thrown toward the inner wall of the pipe due to inertia. When the water flows into the sediment deposition device, the sediment is thrown into the collection box, thereby improving the sediment deposition efficiency.

[0014] Furthermore, the pipe comprises an inner layer, an intermediate layer, and an outer layer connected sequentially from the inside to the outside, and the spiral structure is provided on the inner wall of the inner layer. The use of a three-layer composite pipe allows the pipe to simultaneously possess the properties of multiple different materials, thereby improving its adaptability to the environment.

[0015] Furthermore, the inner layer is a high-performance rigid polyvinyl chloride (PVC) layer, the middle layer is a cross-linked polyethylene (XLPE) layer, and the outer layer is a high-density polyethylene (HDPE) layer. The high-performance rigid PVC is corrosion-resistant, making the inner layer less susceptible to water corrosion and extending its service life. The cross-linked polyethylene (XLPE) middle layer improves its strength, thereby increasing the overall strength of the pipe. The HDPE outer layer is highly adaptable to climates, impact-resistant, and less susceptible to wear.

[0016] Furthermore, the pipe further includes connecting ribs and connecting grooves that cooperate with the connecting ribs. The connecting ribs are provided on the outer walls of the inner layer and the outer walls of the middle layer, and the connecting grooves are provided on the inner walls of the middle layer and the inner walls of the outer layer. The connecting ribs are embedded in the connecting grooves. The connecting ribs and the connecting grooves cooperate to improve the structural strength of the pipe.

[0017] Furthermore, the cross-sectional area of the connecting rib is smaller at the end close to the pipe axis and larger at the end away from the pipe axis, thereby limiting the radial position of each layer of pipe and preventing separation between the inner layer, the middle layer and the outer layer.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The silt deposition device of the present invention and the water delivery pipe having the same have the following advantages: 1. It can utilize gravity to deposit silt in the water at the bottom of the collection box to prevent blockage during water delivery; 2. By arranging a down-leakage component and a back-leakage component, it prevents silt at the bottom of the collection box from flowing back; 3. The filter component filters out large silt particles to prevent large silt particles from colliding with the collection box and causing damage; 4. The spiral structure generates centrifugal force to throw the silt to the bottom of the collection box, thereby improving the silt collection efficiency; 5. The inner layer of the pipe plays an anti-corrosion role, the middle layer increases the strength of the pipe, and the outer layer improves the weather resistance and impact resistance of the pipe. The composite structure of the inner layer, outer layer and middle layer improves the adaptability of the pipe to harsh environments; 6. The connecting ribs cooperate with the connecting grooves to improve the structural strength of the pipe and prevent the separation of the layers of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an exploded view of the structure of the sediment deposition device of the present invention;

[0021] Figure 2 This is a schematic structural diagram of the water delivery pipe of the present utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the pipe of the present utility model;

[0023] Figure 4 This is a schematic structural diagram of the inner layer of the pipe of the present invention;

[0024] Figure 5This is a schematic structural diagram of the middle layer of the pipe of the present invention;

[0025] Figure 6 This is a schematic structural diagram of the outer layer of the pipe of the present invention;

[0026] In the accompanying drawings: 1. Upper cover; 11. Connecting pipe; 111. Water inlet; 112. Water outlet; 12. Upper boss; 13. Upper cover body; 2. Collecting box; 21. Lower boss; 22. Horizontal step; 3. Annular seal; 31. Annular boss; 4. Lower leakage assembly; 41. First lower leakage channel; 42. Limiting boss; 5. Reverse leakage assembly; 51. Second lower leakage channel; 6. Filter assembly; 61. Support block; 7. Pipe; 71. Inner layer; 711. Spiral structure; 72. Middle layer; 73. Outer layer; 74. Connecting rib; 75. Connecting groove. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting 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 from the drawings.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and so on indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Example 1

[0030] like Figure 1 and Figure 2 The figure shows a first embodiment of the sediment deposition device of the present invention, which includes an upper cover 1 and a collection box 2. The upper cover 1 is provided with a plurality of water inlets 111 and water outlets 112. The collection box 2 is installed below the upper cover 1. The water inlets 111, the collection box 2 and the water outlets 112 are connected in sequence.

[0031] In the sediment deposition device of the present invention, water flows into the upper cover 1 through the water inlet 111 and then into the collection box 2. The water flow rate decreases, and the sediment carried in the water is deposited to the bottom of the collection box 2 under the action of gravity. After the water fills the collection box 2, it flows out through the water outlet 112. The heavier sediment in the water remains at the bottom of the collection box 2, thereby achieving water purification and avoiding clogging of the pipeline.

[0032] The structure of the upper cover 1 that can allow water to flow in and out of the sediment deposition device can be applied to the present invention, such as having multiple water inlets 111 and water outlets 112 that can be connected to multiple water pipes. The upper cover 1 structure listed in this embodiment is not limited to the present invention. In this embodiment, the upper cover 1 includes an upper cover 1 main body and a connecting pipe 11. The interior of the upper cover 1 main body is connected to the connecting pipe 11. The two ends of the connecting pipe 11 are respectively a water inlet 111 and a water outlet 112. The upper cover 1 main body and the connecting pipe 11 are integrally formed. The upper cover 1 main body is fixedly mounted on the top of the collection box 2. Figure 1 and Figure 2 shown.

[0033] A horizontal boss extending around the main body of the upper cover 1 is provided at the bottom of the outer wall of the upper cover 1, which is referred to as the upper boss 12. A lower boss 21 is provided at the top of the outer wall of the collection box 2. An annular seal 3 is provided between the upper boss 12 and the lower boss 21. Screw holes are provided on the upper boss 12, the annular seal 3 and the lower boss 21. They are fixed together by screws for easy disassembly and cleaning. The annular seal 3 can improve the sealing between the upper cover 1 and the collection box 2 to prevent water leakage.

[0034] The apparatus further includes a lower drain assembly 4, which is mounted in the collection box 2. The lower drain assembly 4 is provided with a plurality of first lower drain channels 41, which connect the space above and below the lower drain assembly 4. The cross-sectional area of the top of the first lower drain channel 41 is larger than the cross-sectional area of the bottom of the first lower drain channel 41. The first lower drain channels 41 are wider at the top and narrower at the bottom, making it easier for sediment to pass through the lower drain assembly 4 from top to bottom, but more difficult to pass through from bottom to top, thereby preventing sediment from being carried by the water flow and flowing back into the pipe.

[0035] The top of the lower leakage component 4 is provided with a limiting boss 42 extending around the lower leakage component 4, and the annular seal 3 is provided with an annular boss 31 extending from the inner wall of the annular seal 3 to the center of the annular seal 3. The upper surface height of the annular boss 31 is lower than the upper surface of the annular seal 3, and the annular boss 31 can support the limiting boss 42. The inner wall of the annular boss 31 abuts against the lower leakage component 4, thereby supporting and limiting the lower leakage component 4 and preventing the lower leakage component 4 from falling. At the same time, the installation of the lower leakage component 4 can be completed by simply placing the limiting boss 42 on the annular boss 31. The operation is simple, fast, and convenient to disassemble. Figure 1 shown.

[0036] It also includes a reverse leakage component 5, which is installed in the collection box 2 and is located below the lower leakage component 4. The second lower leakage channel 51 connects the space above and below the reverse leakage component 5. The cross-sectional area of the top of the second lower leakage channel 51 is larger than the cross-sectional area of the bottom. The projection of the bottom of the first lower leakage channel 41 on the reverse leakage component 5 is staggered with the top of the second lower leakage channel 51. The first lower leakage channel 41 and the second lower leakage channel 51 are staggered with each other, which can further increase the difficulty of sediment backflow. Figure 1 shown.

[0037] The filter assembly 6 is also included and is installed in the collection box 2 and is located below the anti-leakage assembly 5. The filter assembly 6 prevents large particles of sediment from reaching the bottom of the collection box 2, thereby preventing large particles of sediment from hitting the inner wall of the collection box 2 and avoiding damage to the collection box 2.

[0038] The filter assembly 6 is a rectangular structure with rounded corners. A support block 61 of the same shape is provided on each of the four sides of the filter assembly 6. The four support blocks 61 together support the anti-leakage assembly 5. A horizontal step 22 is provided on the inner wall of the collection box 2. The filter assembly 6 is placed on the horizontal step 22. Figure 1 shown.

[0039] The working principle of the sediment deposition device of this embodiment is as follows: When installing the sediment deposition device, the filter assembly 6 is placed on the horizontal step 22 on the inner wall of the collection box 2, and the anti-leakage assembly 5 is placed on the support block 61 of the filter assembly 6. The annular seal 3 is then placed on the lower boss 21 of the collection box 2, and the limiting boss 42 of the lower leakage assembly 4 is placed on the annular boss 31 of the annular seal 3. The upper cover 1 is then placed on the collection box 2, and the screw holes on the upper boss 12, the annular seal 3, and the lower boss 21 are aligned one by one. The assembly is then secured with screws to complete the sediment deposition device.

[0040] When the sediment deposition device is used, water flows into the upper cover 1 through the water inlet 111 and then into the collection box 2. After the water fills the collection box 2, it flows out through the water outlet 112. After the water flows into the collection box 2, the flow rate decreases, and the sediment carried in the water is deposited to the bottom of the collection box 2 by gravity. The sediment passes through the first down leakage channel 41 through the down leakage component 4, and enters the second down leakage channel 51 with the water flow, and passes through the reverse leakage component 5. A small amount of sediment is affected by the water flow and flows back upward. Part of the returned sediment is blocked by the reverse leakage component 5. The returned sediment that passes through the second down leakage channel 51 cannot directly pass through the first down leakage channel 41 which is staggered with the second down leakage channel 51, further reducing the wear and tear. The amount of backflow sediment through the first down leakage channel 41 and the joint blocking effect of the down leakage component 4 and the back leakage component 5 effectively reduce the backflow of sediment and further improve the purification effect of the water flow; the sediment passes through the down leakage component 4 and the back leakage component 5 and reaches the filter component 6, among which the sediment with particle size larger than the mesh size of the filter component 6 is retained above the filter component 6, and the finer sediment passes through the filter component 6 and reaches the bottom of the collection box 2, avoiding large sediment particles from colliding with the collection box 2 and reducing the risk of damage to the collection box 2; the heavier sediment in the water is deposited at the bottom of the collection box 2, and the water flowing out of the water outlet 112 has been purified, which can avoid blockage during the water delivery process.

[0041] Example 2

[0042] like Figures 2 to 6 The first embodiment of the water pipe of the present invention is shown. It includes several pipes 7 and a sediment deposition device, as described in the first embodiment, installed between the pipes 7. The pipes 7 that input water into the upper cover 1 are connected to the water inlet 111, while the pipes 7 that discharge water from the upper cover 1 are connected to the water outlet 112. Water in the pipes 7 enters the upper cover 1 through the water inlet 111 and flows into the collection box 2. After filling the collection box 2, the water flows into another pipe 7. The sediment in the water is deposited by gravity at the bottom of the collection box 2, thus purifying the water and preventing clogging of the pipes 7.

[0043] In this embodiment, two sections of pipe 7 are respectively connected to the two ends of the connecting pipe 11 .

[0044] The inner wall of the tube 7 is provided with a spiral structure 711. This structure redirects the water flow, causing it to rotate along the inner wall of the tube 7, generating centrifugal force on the sediment. Due to inertia, the sediment is flung toward the inner wall of the tube 7. When the water flows into the sediment deposition device, the sediment is flung into the collection box 2, improving sediment deposition efficiency. During the production process, the tube 7 is extruded while the mold core rotates, forming the spiral structure 711 on the inner wall of the tube 7.

[0045] The working principle of the water pipe of this embodiment is as follows:

[0046] Insert the two sections of pipe 7 into the water inlet 111 and the water outlet 112 of the connecting pipe 11 respectively to complete the installation and start water supply. The water flow near the inner wall of the pipe 7 is blocked by the spiral mechanism and cannot move in a straight line. It begins to flow along the spiral mechanism and drives the entire water body to rotate, generating centrifugal force on the sediment. The sediment is thrown toward the inner wall of the pipe 7 due to inertia. The larger the mass of the sediment, the greater the inertia and the larger the rotation radius, and the easier it is to be thrown toward the inner wall of the pipe 7. When water flows into the sediment deposition device, the sediment is thrown into the collection box 2, thereby improving the sediment deposition efficiency.

[0047] Example 3

[0048] This embodiment is the second embodiment of the water pipe of the present invention. This embodiment is similar to the second embodiment, except that the pipe 7 includes an inner layer 71, an intermediate layer 72 and an outer layer 73 connected in sequence from the inside to the outside, and a spiral structure 711 is provided on the inner wall of the inner layer 71. The use of a three-layer composite pipe 7 allows the pipe 7 to simultaneously possess the properties of multiple different materials, thereby improving its adaptability to the environment. The pipe 7 is extruded through a three-layer co-extrusion process, which can improve the extrusion quality and prevent the introduction of external impurities. The inner layer 71, the intermediate layer 72 and the outer layer 73 are welded in sequence, as shown in FIG. Figures 2 to 6 shown.

[0049] Inner layer 71 is a high-performance rigid polyvinyl chloride (PVC), middle layer 72 is a cross-linked polyethylene (XLPE), and outer layer 73 is a high-density polyethylene (HDPE). High-performance rigid PVC is corrosion-resistant, effectively resisting water corrosion in highly saline and alkaline environments, extending the service life of pipe 7. Middle layer 72 is made of cross-linked polyethylene. The cross-linking modification significantly improves the mechanical properties, environmental stress cracking resistance, creep resistance, and temperature resistance of polyethylene, thereby increasing the strength and heat resistance of middle layer 72 and thus the overall strength of pipe 7. Outer layer 73 is made of high-density polyethylene, which has strong climate adaptability, impact resistance, and is not easily abraded.

[0050] The outer surface of the outer layer 73 is coated with an anti-ultraviolet coating to improve the ability of the tube 7 to resist ultraviolet rays under high-intensity light.

[0051] The inner layer 71 and the middle layer 72 are provided with connecting ribs 74 and connecting grooves 75 which match the connecting ribs 74. Figure 4 and Figure 5 The connecting groove 75 is provided on the inner wall of the intermediate layer 72 and the inner wall of the outer layer 73, as shown; Figure 5 and Figure 6 The connecting rib 74 is embedded in the connecting groove 75. The connecting rib 74 cooperates with the connecting groove 75 to improve the structural strength of the pipe 7. Figure 3 shown.

[0052] In this embodiment, the diameter of the pipe 7 passing through the connecting rib 74 on the outer wall of the inner layer 71 and the diameter of the pipe 7 passing through the connecting rib 74 on the outer wall of the middle layer 72 do not overlap with each other. The connecting rib 74 is a trapezoidal rib, and the connecting groove 75 is a trapezoidal groove that matches the trapezoidal rib. Figure 3 shown.

[0053] The cross-sectional area of the connecting rib 74 is smaller at the end close to the axis of the tube 7 and larger at the end away from the axis of the tube 7. It plays a role in limiting the radial position of each layer of the tube 7, preventing the inner layer 71, the middle layer 72 and the outer layer 73 from separating. Figures 4 to 6 shown.

[0054] The working principle of the water pipe of this embodiment is as follows:

[0055] The inner layer 71 improves the corrosion resistance of the pipe 7, the middle layer 72 improves the strength of the pipe 7, and the outer layer 73 improves the weather resistance and impact resistance of the pipe 7, thereby greatly enhancing the adaptability of the pipe 7 to harsh environments. The coordinated connection of the connecting ribs 74 and the connecting grooves 75 not only improves the structural strength of the pipe 7, but also makes the inner layer 71, the middle layer 72 and the outer layer 73 more tightly bonded, making separation less likely to occur, thereby further extending the service life of the pipe 7.

[0056] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A sediment deposition device, characterized in that: The invention comprises an upper cover (1) and a collection box (2), wherein the upper cover (1) is provided with a plurality of water inlets (111) and water outlets (112), and the collection box (2) is installed below the upper cover (1), and the water inlets (111), the collection box (2) and the water outlets (112) are sequentially connected.

2. The sediment deposition device according to claim 1, characterized in that: The invention also comprises a lower leakage component (4), wherein the lower leakage component (4) is installed in the collection box (2), and a plurality of first lower leakage channels (41) are provided on the lower leakage component (4), wherein the first lower leakage channels (41) connect the space above and below the lower leakage component (4), and the cross-sectional area of the top of the first lower leakage channel (41) is greater than the cross-sectional area of the bottom of the first lower leakage channel (41).

3. The sediment deposition device according to claim 2, characterized in that: The invention also includes a reverse leakage component (5), which is installed in the collection box (2) and is located below the lower leakage component (4). The reverse leakage component (5) is provided with a plurality of second lower leakage channels (51), and the second lower leakage channels (51) connect the space above and below the reverse leakage component (5). The cross-sectional area of the top of the second lower leakage channel (51) is larger than the cross-sectional area of the bottom. The projection of the bottom of the first lower leakage channel (41) on the reverse leakage component (5) is staggered with the top of the second lower leakage channel (51).

4. The sediment deposition device according to claim 3, characterized in that: It also includes a filter assembly (6), which is installed in the collection box (2) and is located below the anti-leakage assembly (5).

5. A water pipe, characterized in that: The invention comprises a plurality of pipes (7) and a sediment deposition device according to any one of claims 1 to 4 installed between the plurality of pipes (7), wherein the pipes (7) for inputting water into the upper cover are connected to the water inlet (111), and the pipes (7) for discharging water from the upper cover are connected to the water outlet (112).

6. The water pipe according to claim 5, characterized in that: The inner wall of the pipe (7) is provided with a spiral structure (711).

7. The water pipe according to claim 6, characterized in that: The pipe (7) comprises an inner layer (71), an intermediate layer (72) and an outer layer (73) which are sequentially connected from the inside to the outside, and the spiral structure (711) is arranged on the inner wall of the inner layer (71).

8. The water pipe according to claim 7, characterized in that: The inner layer (71) is a high-performance rigid polyvinyl chloride layer, the middle layer (72) is a cross-linked polyethylene layer, and the outer layer (73) is a high-density polyethylene layer.

9. The water pipe according to claim 7, characterized in that: It also includes a connecting rib (74) and a connecting groove (75) that matches the connecting rib (74), wherein the connecting rib (74) is arranged on the outer wall of the inner layer (71) and the outer wall of the middle layer (72), and the connecting groove (75) is arranged on the inner wall of the middle layer (72) and the inner wall of the outer layer (73), and the connecting rib (74) is embedded in the connecting groove (75).

10. The water pipe according to claim 9, characterized in that: The cross-sectional area of the connecting rib (74) at one end close to the axis of the pipe (7) is smaller, and the cross-sectional area of the end away from the axis of the pipe (7) is larger.

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