Polyethylene pipe with slow crack growth resistance

Abstract

The utility model discloses a polyethylene pipe with slow crack growth resistance, and particularly relates to the technical field of polyethylene pipes, the polyethylene pipe comprises a pipe body, the pipe body comprises an antibacterial layer, an inner pipe, a reinforcing layer, an outer pipe, a metal net sleeve, a heat preservation layer, a buffer layer and a heat absorption layer, the antibacterial layer is arranged in the inner pipe, and the reinforcing layer is arranged in the outer pipe. The reinforcing layer is arranged outside the inner pipe, and the reinforcing layer is sleeved with the outer pipe. The antibacterial layer is made of silver ion materials with strong antibacterial performance, so that fluid in the pipe body can be sterilized, bacteria are prevented from breeding and corroding the pipe body, meanwhile, the reinforcing layer is made of pre-impregnated short glass fiber materials with excellent mechanical performance, and the antibacterial performance of the pipe body is improved. Therefore, the mechanical strength and the impact resistance of the utility model can be improved, the generation of cracks can be effectively prevented, the use performance of the utility model can be effectively improved, and the service life of the utility model can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of polyethylene pipes, and more specifically to a polyethylene pipe with slow crack growth resistance performance. Background Art

[0002] Polyethylene pipes can be divided into high-density polyethylene, medium-density polyethylene and low-density polyethylene according to different polymerization conditions. Internationally, the materials of polyethylene pipes are usually divided into five grades: PE32, PE40, PE63, PE80, and PE100. Among them, the materials used for gas pipes and water supply pipes are mainly PE80 and PE100. The slow crack growth resistance performance refers to a special polyethylene pipe with the ability to resist long-term crack propagation. During long-term use, this material can effectively prevent the gradual expansion of micro-cracks caused by environmental factors and stress, thus ensuring the safe and reliable operation of the pipeline system.

[0003] Cracking is a crack or fracture phenomenon that occurs in pipes under the action of internal or external factors. The importance of preventing cracking is self-evident, because once the pipe cracks, leakage, accidents and other serious consequences will occur. As shown in the prior art with the publication number CN204729780U, although this prior art uses high-pressure-resistant high-density polyethylene with a PE100 level and an MRS value of 10 MPa for the inner layer, and a room-temperature self-crosslinking silane cross-linked polyethylene for the outer layer, and the inner and outer layers are co-extruded and integrally formed into a completely bonded structure without interface separation, and a metal wire is arranged between the two layers for positioning detection after the pipe is buried underground, its structure is simple, the design is reasonable, and it has better scratch resistance, slow crack growth resistance and rapid crack propagation resistance, making the trenchless laying of gas pipes safer and more reliable. However, this prior art cannot purify the fluid inside the pipe, resulting in the impurities in the fluid damaging the pipe due to chemical corrosion, which will further affect the crack resistance of the pipe. Summary of the Utility Model

[0004] In order to overcome the above defects of the prior art, the utility model provides a polyethylene pipe with slow crack growth resistance performance, which sterilizes the fluid in the pipe body through an antibacterial layer to prevent bacteria from growing and corroding the pipe body. At the same time, with the help of a strengthening layer, the mechanical strength and impact resistance of the utility model are improved, thereby effectively preventing the generation of cracks to solve the problems in the above background art.

[0005] To achieve the above object, the present utility model provides the following technical solutions: A polyethylene pipe with slow crack growth resistance performance, comprising a pipe body, wherein the pipe body includes an antibacterial layer, an inner pipe, a reinforcing layer, an outer pipe, a metal mesh sleeve, a thermal insulation layer, a buffer layer and a heat absorption layer. The antibacterial layer is arranged inside the inner pipe, the reinforcing layer is arranged outside the inner pipe, the outer pipe is sleeved outside the reinforcing layer, the metal mesh sleeve is arranged outside the outer pipe, the thermal insulation layer is arranged outside the metal mesh sleeve, the buffer layer is arranged outside the thermal insulation layer, and the heat absorption layer is arranged outside the buffer layer. Through the double-layer nesting of the inner pipe and the outer pipe, when the inner pipe cracks and is damaged, the outer pipe still has the conveying effect, thereby ensuring the use performance of the pipe body. With the help of the metal mesh, the toughness of the pipe body is ensured to avoid fracture. The setting of the thermal insulation layer and the heat absorption layer can reduce the temperature difference between the inside and outside of the pipe body, thereby avoiding cracking due to excessive temperature difference. The setting of the buffer layer can reduce the damage to the pipe body caused by impact.

[0006] In a preferred embodiment, both the inner pipe and the outer pipe are made of polyethylene material. By using polyethylene material to make the inner pipe and the outer pipe, the low-temperature resistance and corrosion resistance of the present utility model can be improved.

[0007] In a preferred embodiment, the antibacterial layer is made of silver ion material. By using silver ion material with strong antibacterial performance to make the antibacterial layer, the present utility model can sterilize the fluid in the pipe body to prevent bacteria from growing and corroding the pipe body, thereby improving the corrosion resistance and crack resistance of the pipe body.

[0008] In a preferred embodiment, the reinforcing layer is made of pre-impregnated short glass fibers. Pre-impregnated short glass fibers are usually made by compounding different types of resins, such as epoxy resins and unsaturated polyester resins, with chopped glass fibers. This material has the characteristics of rapid prototyping, excellent mechanical properties and environmental protection. By using pre-impregnated short glass fiber material with excellent mechanical properties to make the reinforcing layer, the mechanical strength and impact resistance of the present utility model can be improved, thereby effectively preventing the generation of cracks, improving the use performance of the present utility model and extending the service life of the present utility model.

[0009] In a preferred embodiment, the thermal insulation layer is made of polyurethane material. Polyurethane material is a polymer material formed by the polycondensation reaction of polyols and polyisocyanates. By using polyurethane material with advantages such as high specific strength and low thermal conductivity to make the thermal insulation layer, the thermal insulation performance of the present utility model can be ensured.

[0010] In a preferred embodiment, the buffer layer is made of rubber material. By using rubber material with unique elasticity and deformation ability, the damage to the pipe body caused by impact can be slowed down.

[0011] In a preferred embodiment, the heat-absorbing layer is made of ABS heat-absorbing plastic. The ABS heat-absorbing material has high hardness, good mechanical strength, excellent wear resistance, and compressive strength that can be maintained even at low temperatures. By using ABS heat-absorbing plastic that can absorb heat and maintain stable physical properties at high temperatures to make the heat-absorbing layer, it is possible to avoid the situation where the main body of the pipe cracks due to excessive temperature difference.

[0012] Technical effects and advantages of the present utility model:

[0013] 1. By using silver ion material with strong antibacterial properties to make the antibacterial layer, the present utility model can sterilize the fluid in the main body of the pipe, prevent bacteria from growing and corroding the main body of the pipe. At the same time, by using pre-impregnated short glass fiber material with excellent mechanical properties to make the reinforcing layer, the mechanical strength and impact resistance of the present utility model can be improved, thereby effectively preventing the generation of cracks, and effectively improving the service performance and extending the service life of the present utility model;

[0014] 2. Through the double-layer nesting of the inner pipe and the outer pipe, when the inner pipe cracks and is damaged, the outer pipe still has the function of transportation, thereby ensuring the service performance of the main body of the pipe. Description of the drawings

[0015] Figure 1 It is a cross-sectional view of the main body of the pipe of the present utility model;

[0016] Figure 2 It is of the present utility model Figure 1 Enlarged view of part A;

[0017] Figure 3 It is an exploded view of the main body of the pipe of the present utility model;

[0018] Figure 4 It is a side cross-sectional view of the main body of the pipe of the present utility model;

[0019] Figure 5 It is of the present utility model Figure 4 Enlarged view of part B.

[0020] Reference numerals are: 1, main body of the pipe; 2, antibacterial layer; 3, inner pipe; 4, reinforcing layer; 5, outer pipe; 6, metal mesh sleeve; 7, heat-insulating layer; 8, buffer layer; 9, heat-absorbing layer. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0022] Referring to the attached Figures 1-5 drawings, the present utility model provides a polyethylene pipe with slow crack growth resistance performance, and its model is PE100RC, which includes a pipe body 1. The pipe body 1 includes an antibacterial layer 2, an inner pipe 3, a strengthening layer 4, an outer pipe 5, a metal mesh sleeve 6, a heat insulation layer 7, a buffer layer 8, and a heat absorption layer 9. The antibacterial layer 2 is arranged inside the inner pipe 3, the strengthening layer 4 is arranged outside the inner pipe 3, the outer pipe 5 is sleeved outside the strengthening layer 4, the metal mesh sleeve 6 is arranged outside the outer pipe 5, the heat insulation layer 7 is arranged outside the metal mesh sleeve 6, the buffer layer 8 is arranged outside the heat insulation layer 7, and the heat absorption layer 9 is arranged outside the buffer layer 8. The antibacterial layer 2 sterilizes the fluid in the pipe body 1 to prevent bacteria from growing and corroding the pipe body 1. At the same time, the mechanical strength and impact resistance of the present utility model are improved by means of the strengthening layer 4. Through the double-layer nesting of the inner pipe 3 and the outer pipe 5, when the inner pipe 3 is cracked and damaged, the outer pipe 5 still has the conveying effect, thereby ensuring the service performance of the pipe body 1. Then, the toughness of the pipe body 1 is ensured by means of the metal mesh to avoid fracture. The settings of the heat insulation layer 7 and the heat absorption layer 9 can reduce the temperature difference inside and outside the pipe body 1, thereby avoiding the situation of cracking due to excessive temperature difference. The setting of the buffer layer 8 can reduce the damage of the impact to the pipe body 1.

[0023] To improve the heat insulation performance, heat absorption performance and toughness of the pipe body 1, as Figures 1-5 shown, both the inner pipe 3 and the outer pipe 5 are made of polyethylene material. By using polyethylene material to make the inner pipe 3 and the outer pipe 5, the low temperature resistance and corrosion resistance of the present utility model can be improved. The pipe body 1 with the model of PE100RC has excellent anti-cracking performance and can maintain long-term stability and durability under extreme conditions. Its purpose is to address the leakage and damage problems caused by scratches on the outer wall of the pipe body 1 and point loads in traditional construction. The heat insulation layer 7 is made of polyurethane material. By using polyurethane material with advantages such as high specific strength and small thermal conductivity to make the heat insulation layer 7, the heat insulation performance of the present utility model can be ensured. The buffer layer 8 is made of rubber material. By using rubber material with unique elasticity and deformation ability, the damage of the impact to the pipe body 1 can be slowed down. The heat absorption layer 9 is made of ABS heat-absorbing plastic. By using ABS heat-absorbing plastic that can absorb heat and maintain stable physical properties at high temperatures to make the heat absorption layer 9, the situation of cracking due to excessive temperature difference in the pipe body 1 can be avoided.

[0024] In order to improve the antibacterial performance and mechanical strength of the pipe body 1, as Figures 1-5 shown, the antibacterial layer 2 is made of silver ion material. By using the silver ion material with strong antibacterial performance to make the antibacterial layer 2, the utility model can sterilize the fluid in the pipe body 1 and prevent bacteria from growing and corroding the pipe body 1. The reinforcing layer 4 is made of pre-impregnated short glass fibers. By using the pre-impregnated short glass fiber material with excellent mechanical properties to make the reinforcing layer 4, the mechanical strength and impact resistance of the utility model can be improved, thereby effectively preventing the generation of cracks. Thus, the service performance of the utility model can be improved and the service life of the utility model can be extended.

[0025] Finally, the above are only the preferred embodiments of the utility model and are not used to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A polyethylene pipe having slow crack growth resistance, comprising a pipe body (1), characterized in that: The pipe body (1) comprises an antibacterial layer (2), an inner pipe (3), a reinforcing layer (4), an outer pipe (5), a metal mesh sleeve (6), a heat-insulating layer (7), a buffer layer (8) and a heat-absorbing layer (9); the antibacterial layer (2) is arranged inside the inner pipe (3), the reinforcing layer (4) is arranged outside the inner pipe (3), the outer pipe (5) is sleeved outside the reinforcing layer (4), the metal mesh sleeve (6) is arranged outside the outer pipe (5), the heat-insulating layer (7) is arranged outside the metal mesh sleeve (6), the buffer layer (8) is arranged outside the heat-insulating layer (7), and the heat-absorbing layer (9) is arranged outside the buffer layer (8).

2. The polyethylene pipe having slow crack growth resistance according to claim 1, characterized in that: The inner tube (3) and the outer tube (5) are both made of polyethylene material.

3. The polyethylene pipe having slow crack growth resistance according to claim 1, characterized in that: The antibacterial layer (2) is made of silver ion material.

4. The polyethylene pipe having slow crack growth resistance according to claim 1, characterized in that: The reinforcement layer (4) is made of pre-impregnated short glass fibers.

5. The polyethylene pipe having slow crack growth resistance according to claim 1, characterized in that: The thermal insulation layer (7) is made of polyurethane material.

6. The polyethylene pipe having slow crack growth resistance according to claim 1, characterized in that: The buffer layer (8) is made of rubber material.

7. The polyethylene pipe having slow crack growth resistance according to claim 1, characterized in that: The heat absorbing layer (9) is made of ABS heat absorbing plastic.

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