Winding pipe and drainage pipe

Abstract

The utility model discloses a winding pipe and a drainage pipe, and belongs to the technical field of engineering winding pipes. The winding pipe comprises a pipe body and a negative Poisson's ratio structure, the pipe body is rectangular, and the negative Poisson's ratio structure is arranged in the pipe body so that the anti-pressure capacity of the winding pipe can be improved. According to the utility model, the stress can be effectively dispersed, so that the pipe is not easy to deform when being subjected to local pressure, the bearing capacity of the pipe is improved, and the pipe is suitable for being applied in a high-pressure environment.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering winding pipes, in particular to a winding pipe and a drainage pipe material. Background Art

[0002] Plastic drainage pipes have the advantages of corrosion resistance, light weight, easy installation, large flow rate and long life, and are also environmentally friendly green products. They have begun to gradually replace pipes made of high-energy consumption materials such as cement, cast iron, and ceramics. In the prior art, drainage pipes are mostly hollow winding pipes that are spirally wound to form a pipe body. The overall strength is not ideal and is easily deformed by external forces.

[0003] The compressive resistance of the spiral pipe directly determines the quality of the drainage pipe. How to strengthen the strength of the hollow pipe profile in the spiral pipe so that the spiral pipe is not easily deformed or can rebound and restore the structure after deformation has become an urgent problem to be solved. Utility Model Content

[0004] In view of this, it is necessary to provide a winding pipe and a drainage pipe material to solve the problem of low compressive strength of the existing winding pipe.

[0005] In a first aspect, the utility model provides a winding tube, comprising:

[0006] A tube body, wherein the tube body is rectangular;

[0007] The negative Poisson's ratio structure is arranged inside the tube body to improve the compression resistance of the winding tube.

[0008] Furthermore, the negative Poisson's ratio structure includes two symmetrically arranged bending parts, the two bending parts are bent relative to each other, and two ends of the bending parts are respectively connected to the upper side and the lower side of the inner wall of the tube body.

[0009] Furthermore, the negative Poisson's ratio structure also includes two symmetrically arranged support members, and two ends of one of the support members are respectively connected to a bent portion of the bending member and one side of the tube body.

[0010] Furthermore, the negative Poisson's ratio structure includes a first herringbone member and a second herringbone member, the second herringbone member and the first herringbone member have the same opening direction, the two ends of the second herringbone member are fixedly connected to the two ends of the first herringbone member, the protruding end of the first herringbone member is connected to the upper side of the inner wall of the tube body, and the two ends of the second herringbone member are respectively connected to the lower side of the inner wall of the tube body.

[0011] Furthermore, the outer diameter of the tube body is 60 mm, the width is 69 mm, and the thickness is 3 mm.

[0012] Furthermore, the winding tube is a polyethylene tube, and the tube body and the negative Poisson's ratio structure are integrally connected.

[0013] Furthermore, the tube body is a high-density polyethylene tube body, and the negative Poisson's ratio structure is a low-density polyethylene structure.

[0014] Furthermore, a low-density polyethylene layer is provided on the inner wall of the tube body, and the low-density polyethylene layer is integrally connected to the negative Poisson's ratio structure.

[0015] Furthermore, the four corners of the tube body are arc angles.

[0016] In a second aspect, a drainage pipe is formed by spirally winding and welding the winding pipe.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) The utility model discloses a winding tube, including a tube body and a negative Poisson's ratio structure. The tube body is rectangular, and the negative Poisson's ratio structure is arranged inside the tube body. When the negative Poisson's ratio structure is stretched or compressed, its lateral dimensions will increase or decrease at the same time, which can effectively disperse the stress, so that the tube is not easy to deform when subjected to local pressure, thereby improving the bearing capacity of the tube and being suitable for application in high-pressure environments. At the same time, the negative Poisson's ratio structure can reduce the local stress concentration phenomenon and reduce the risk of rupture or damage of the tube under high-pressure environments. The negative Poisson's ratio structure is more solid and stable when subjected to external pressure, which significantly improves the anti-deformation ability of the winding tube.

[0019] (2) The utility model provides a drainage pipe material, which is formed by spirally winding and welding a winding pipe. When the obtained drainage pipe is subjected to radial pressure, the negative Poisson's ratio structure located in the winding pipe shrinks in the axial direction, thereby distributing the stress more evenly, enhancing the compression and deformation resistance of the pipe, and effectively absorbing and dispersing the impact energy, reducing the damage to the pipe caused by external force impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 The structure of the tube body in the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The structure of the tube body in the utility model is shown in FIG. Figure 2 ;

[0023] Figure 3The structure of the tube body in the utility model is shown in FIG. Figure 3 ;

[0024] Figure 4 It is a schematic diagram of the overall structure of the utility model.

[0025] In the figure, 100, tube body; 110, low-density polyethylene layer;

[0026] 200, negative Poisson's ratio structure; 210, bending member; 220, supporting member; 230, first herringbone member; 240, second herringbone member;

[0027] 300. Drainage pipes. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0029] A winding pipe and drainage pipe in this embodiment relate to the technical field of engineering winding pipes. A negative Poisson's ratio structure 200 is arranged inside the winding pipe. The negative Poisson's ratio structure 200 is more solid and stable when subjected to force, which significantly improves the deformation resistance of the winding pipe, thereby improving the overall structural strength and compressive resistance of the drainage pipe body 100.

[0030] See also Figures 1 to 4 In this embodiment, a winding tube includes a tube body 100 and a negative Poisson's ratio structure 200. The tube body 100 is rectangular, and the negative Poisson's ratio structure 200 is arranged inside the tube body 100. When the negative Poisson's ratio structure 200 is stretched or compressed, its transverse dimension will increase or decrease at the same time, which can effectively disperse the stress, so that the tube is not easy to deform when subjected to local pressure, and the bearing capacity of the tube is improved, which is suitable for applications in high-pressure environments. At the same time, the negative Poisson's ratio structure 200 can reduce the local stress concentration phenomenon and reduce the risk of rupture or damage of the tube in a high-pressure environment.

[0031] In addition, the negative Poisson's ratio structure 200 is more solid and stable when subjected to external pressure, which significantly improves the anti-deformation ability of the winding pipe.

[0032] In some embodiments, see Figure 1 and Figure 3The negative Poisson's ratio structure 200 includes two symmetrically arranged bending pieces 210. The two bending pieces 210 are specifically in the shape of inverted angle brackets. The two bending pieces 210 are relatively bent. The two ends of the bending pieces 210 are respectively connected to the upper side and the lower side of the inner wall of the tube body 100. When the tube body 100 is subjected to pressure from both sides, the two bending pieces 210 will shrink inward, which can effectively disperse the stress to the entire structure, avoid stress concentration in a certain place, and reduce the risk of local deformation. Due to its special geometric shape, the bending piece 210 has a negative Poisson's ratio effect. When subjected to external pressure, the bending piece 210 will shrink and deform relatively, offset part of the external pressure, and increase the overall compressive resistance of the structure.

[0033] The bending piece 210 has good elastic properties. When the pressure from the lower side decreases or disappears, the bending piece 210 can quickly return to its original shape, so that the tube body 100 returns to its original shape in a short time and maintains the integrity of the structure.

[0034] In a further implementation process, the negative Poisson's ratio structure 200 further includes two symmetrically arranged support members 220, and the two ends of one support member 220 are respectively connected to the bending portion of one bending member 210 and one side of the tube body 100. The two ends of the other support member 220 are respectively connected to the bending portion of the other bending member 210 and the other side of the tube body 100.

[0035] The support member 220 provides additional support between the bending member 210 and the pipe body 100, forming a more stable triangular structure. The triangular structure has natural stability, can effectively resist external pressure, and enhance the rigidity and pressure resistance of the entire pipeline. The support member 220 can also reduce the bending degree of the bending member 210 when subjected to external force, thereby reducing the overall deformation of the pipeline and improving its structural stability.

[0036] In some embodiments, see Figure 2 The negative Poisson's ratio structure 200 includes a first herringbone member 230 and a second herringbone member 240. The second herringbone member 240 and the first herringbone member 230 have the same opening direction. Both ends of the second herringbone member 240 are fixedly connected to both ends of the first herringbone member 230. The protruding end of the first herringbone member 230 is connected to the upper side of the inner wall of the tube body 100, and the two ends of the second herringbone member 240 are respectively connected to the lower side of the inner wall of the tube body 100.

[0037] The interlocking structure formed by the first herringbone member 230 and the second herringbone member 240 can support each other and offset part of the stress when subjected to external force, thereby increasing the overall rigidity and stability of the pipeline and reducing the deformation and damage risks of a single component.

[0038] The herringbone structure can evenly disperse the external force in all directions, avoid stress concentration in a certain local area, and reduce the risk of damage caused by local stress concentration. Through the connection of the first and second herringbone pieces 240, the external pressure can be effectively transmitted to various parts of the pipe body 100, so that the entire pipeline structure is evenly stressed and its overall pressure resistance is improved.

[0039] The design of the first and second herringbone members 240 allows the pipeline to appropriately shrink inward in the transverse direction when subjected to compression force, thereby offsetting part of the longitudinal compression deformation and improving the anti-deformation capability.

[0040] In some embodiments, see Figure 3 The outer diameter of the tube body 100 is 60 mm, the width is 69 mm, and the thickness is 3 mm.

[0041] Ring stiffness is an important parameter for the ability of plastic buried drainage and sewage pipes to resist external loads. According to ISO standards, the ring stiffness S (unit MPa, can also be expressed as kN / m2) is defined as:

[0042] S=EI / D3

[0043] Where: E is the elastic modulus of the material, unit: MPa;

[0044] I is the moment of inertia of the pipe wall, in m3;

[0045] D is the average diameter of the pipe, in m.

[0046] The ring stiffness of the pipe is mainly determined by three factors: the pipe material, the structure and the average diameter of the pipe. The elastic modulus depends on the material selection. When the material selection is fixed, increasing the moment of inertia of the structural section can achieve the purpose of increasing the ring stiffness and saving costs.

[0047] The outer diameter of the existing tube body 100 is 60 mm in length, 40 mm in width, 4 mm in thickness, and has a cross-sectional area of ​​S=736 mm2, A-Ix=178005.

[0048] Under the premise of keeping the cross-sectional area unchanged, the size of the tube body 100 is changed to 60 mm, the width is 69 mm, the thickness is 3 mm, the cross-sectional area is S = 738 mm2, and B-Ix = 517333. B-Ix is 2.9 times of A-Ix.

[0049] As a preferred embodiment, the outer diameter of the improved tube body 100 is 60 mm, the width is 68.67 mm, the thickness is 3 mm, the cross-sectional area is S=736 mm2, and C-Ix=511468. C-Ix is 2.87 times of A-Ix.

[0050] In some embodiments, see Figure 3The winding pipe is a polyethylene pipe, the pipe body 100 and the negative Poisson's ratio structure 200 are connected in an integrated manner, and the tank body and the negative Poisson's ratio structure 200 are extruded from polyethylene plastic and formed in one piece. The integrated molding process ensures a seamless connection between the pipe body 100 and the negative Poisson's ratio structure 200, eliminates possible weaknesses in the joint, and improves the overall strength and rigidity. At the same time, since the pipe body 100 and the negative Poisson's ratio structure 200 are an integral structure formed in one step, there is no stress concentration problem at the joint, and the entire pipeline exhibits better overall stability when subjected to stress.

[0051] In the specific implementation process, the pipe body 100 is a high-density polyethylene pipe body 100, and the negative Poisson's ratio structure 200 is a low-density polyethylene structure. The high-density polyethylene pipe body 100 has the characteristics of good wear resistance, electrical insulation, toughness, cold resistance and chemical stability. Under room temperature conditions, the high-density polyethylene pipe body 100 is insoluble in any organic solvent, and is resistant to corrosion by acids, alkalis and various salts. The high-density polyethylene pipe body 100 that is directly in contact with external soil and internal sewage has good stability and strong corrosion resistance.

[0052] The negative Poisson's ratio structure 200 of low-density polyethylene has good softness and extensibility. The negative Poisson's ratio structure 200 of low-density polyethylene can effectively absorb and disperse external impact energy and reduce damage to the material itself.

[0053] The soft low-density polyethylene negative Poisson's ratio structure 200 is not prone to brittle failure when impacted, and can better maintain structural integrity. The low-density polyethylene negative Poisson's ratio structure 200 will expand or contract laterally when stretched or compressed, and can quickly return to its original shape after deformation, thereby improving the resilience of the structure.

[0054] As a further embodiment, the inner wall of the pipe body 100 is provided with a low-density polyethylene layer 110. The flexibility of the low-density polyethylene layer 110 enables the pipe to effectively absorb and disperse stress when impacted by external force, reduce damage, provide additional protection for the pipe body 100, and reduce the risk of pipe rupture.

[0055] In the specific implementation process, the low-density polyethylene layer 110 is integrally connected with the negative Poisson's ratio structure 200. After the tube body 100 is formed, the negative Poisson's ratio structure 200 is secondary extruded inside the tube body 100 using low-density polyethylene material. The low-density polyethylene layer 110 can strengthen the connection and fixation between the negative Poisson's ratio structure 200 and the tube body 100, thereby avoiding breakage and detachment between the negative Poisson's ratio structure 200 and the tube body 100.

[0056] In some embodiments, the four corners of the pipe body 100 are arc corners. The arc corner design can effectively disperse the stress concentration at the corners, avoid the stress concentration phenomenon caused by sharp corners, and thus reduce the risk of rupture and damage of the pipe under stress. The stress distribution at the arc corners is more uniform, which helps to improve the overall structural strength and deformation resistance of the pipe body 100.

[0057] The utility model provides a drainage pipe material, wherein the drainage pipe material 300 is formed by spirally winding and welding a winding pipe, and when the obtained drainage pipe material 300 is subjected to radial pressure, the negative Poisson's ratio structure 200 located in the winding pipe shrinks in the axial direction, thereby distributing stress more evenly, enhancing the compression resistance and deformation resistance of the pipe, effectively absorbing and dispersing impact energy, and reducing pipe damage caused by external force impact.

[0058] The combination of the spiral winding process and the negative Poisson's ratio structure 200 reduces the material aging rate and improves the durability of the pipeline in various environments. At the same time, it can also make the pipeline have good flexibility, adapt to uneven foundation settlement and dynamic loads, and reduce damage caused by foundation changes.

[0059] Workflow: First, the winding pipe is formed on a plastic extruder, and a negative Poisson's ratio structure 200 is formed inside the pipe body 100. Then, the winding pipe is bolted and welded on the winding machine to form a drainage pipe 300.

[0060] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the present invention.

Claims

1. A winding pipe, characterized in that: include; A tube body, wherein the tube body is rectangular; The negative Poisson's ratio structure is arranged inside the tube body to improve the compression resistance of the winding tube.

2. A winding pipe according to claim 1, characterized in that: The negative Poisson's ratio structure includes two symmetrically arranged bending pieces, the two bending pieces are bent relative to each other, and two ends of the bending pieces are respectively connected to the upper side and the lower side of the inner wall of the tube body.

3. A coiled pipe according to claim 2, characterized in that: The negative Poisson's ratio structure further includes two symmetrically arranged support members, and two ends of one of the support members are respectively connected to a bent portion of the bent member and one side of the tube body.

4. A winding pipe according to claim 1, characterized in that: The negative Poisson's ratio structure includes a first zigzag member and a second zigzag member, the second zigzag member and the first zigzag member have the same opening direction, two ends of the second zigzag member are fixedly connected to two ends of the first zigzag member, the protruding end of the first zigzag member is connected to the upper side of the inner wall of the tube body, and two ends of the second zigzag member are respectively connected to the lower side of the inner wall of the tube body.

5. The winding pipe according to claim 1, characterized in that: The outer diameter of the tube is 60 mm, the width is 69 mm, and the thickness is 3 mm.

6. The winding pipe according to claim 1, characterized in that: The winding pipe is a polyethylene pipe, and the pipe body and the negative Poisson's ratio structure are integrally connected.

7. A coiled pipe according to claim 6, characterized in that: The tube body is a high-density polyethylene tube body, and the negative Poisson's ratio structure is a low-density polyethylene structure.

8. A coiled pipe according to claim 7, characterized in that: The inner wall of the tube body is provided with a low-density polyethylene layer, and the low-density polyethylene layer is integrally connected with the negative Poisson's ratio structure.

9. The winding pipe according to claim 1, characterized in that: The four corners of the tube body are arc angles.

10. A drainage pipe, characterized in that: The wound tube is formed by spirally winding and welding a wound tube as described in any one of claims 1 to 9.

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