Pressure-resistant PP-R cold and hot water pipe

Abstract

The utility model discloses a pressure-resistant PP-R cold and hot water pipe, and relates to the technical field of PR-R cold and hot water pipes, the pressure-resistant PP-R cold and hot water pipe comprises a PP-R pipe body, an antibacterial layer is arranged on the inner peripheral side of the PP-R pipe body, a heat preservation layer is arranged on the outer peripheral side of the PP-R pipe body, a buffer layer is arranged on the outer peripheral side of the heat preservation layer, and an anti-corrosion layer is arranged on the outer peripheral side of the buffer layer. The antibacterial layer can solve the problem of bacterium breeding caused by oxygen permeation or water flow, the heat preservation layer can prevent the PP-R pipe body from being damaged in a low-temperature environment, meanwhile, it can be ensured that the water flow flows at the relatively stable temperature, and therefore the internal pressure can be stabilized, the situation that the pipe body is damaged due to the fact that the internal pressure of the PP-R pipe body is too large is prevented, and the service life of the PP-R pipe body is prolonged. The buffering layer can achieve the buffering effect when the PP-R pipe body is extruded or subjected to external impact force, extrusion damage is prevented, the anti-corrosion layer can prevent the PP-R pipe body from being corroded by the external environment, and therefore the service life of the PP-R pipe body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of PR-R cold and hot water pipes, in particular to a pressure-resistant PP-R cold and hot water pipe. Background Art

[0002] PP-R pipes, also known as Type III polypropylene pipes or random copolymer polypropylene pipes, offer advantages such as energy conservation and material saving, environmental friendliness, lightweight and high strength, corrosion resistance, a smooth inner wall that resists scaling, easy construction and maintenance, and a long service life. They are widely used in construction, municipal administration, industry, and agriculture, including building water supply and drainage, urban and rural water supply and drainage, city gas, electricity, fiber optic cable sheathing, industrial fluid transportation, and agricultural irrigation. Due to their high cost-effectiveness, they are the preferred material for water pipe installation and renovation. Existing PP-R pipes have average compressive strength. When subjected to high pressure, they are prone to cracking and damage on the pipe wall, and their surface is also prone to scratching, posing certain safety risks.

[0003] Patent announcement number CN 217927582 U discloses a pressure-resistant and oxidation-resistant PP-R hot and cold water pipe, including a pipe body, the outer wall of which is fixedly connected to a pressure-resistant ring, and the pipe body is provided with a wear-resistant layer, a fire-proof layer, an antifreeze layer and an anti-oxidation layer. The inner wall of the wear-resistant layer is fixedly connected to the outer wall of the fire-proof layer by an adhesive, the inner wall of the fire-proof layer is fixedly connected to the outer wall of the antifreeze layer by an adhesive, and the inner wall of the antifreeze layer is fixedly connected to the outer wall of the anti-oxidation layer by an adhesive.

[0004] The common PP-R hot and cold water pipes on the market have problems such as weak pressure resistance, poor thermal insulation effect, easy breeding of bacteria and easy corrosion. Therefore, it is necessary to improve the traditional PP-R hot and cold water pipes and design a new type of PP-R hot and cold water pipe with strong pressure resistance, ideal thermal insulation effect, not easy to breed bacteria and not easy to corrode. Utility Model Content

[0005] The purpose of the utility model is to provide a pressure-resistant PP-R hot and cold water pipe to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a pressure-resistant PP-R hot and cold water pipe, characterized in that it includes a PP-R pipe body, an antibacterial layer is provided on the inner circumference of the PP-R pipe body, an insulation layer is provided on the outer circumference of the PP-R pipe body, a buffer layer is provided on the outer circumference of the insulation layer, and an anti-corrosion layer is provided on the outer circumference of the buffer layer.

[0007] Furthermore, the antibacterial layer is a silver-loaded PAG-40 antibacterial agent coating layer, and the thickness of the silver-loaded PAG-40 antibacterial agent coating layer is 0.05mm-0.06mm.

[0008] Furthermore, the insulation layer includes a connected thermosetting phenolic resin coating and a polytetrafluoroethylene coating, the thermosetting phenolic resin coating is coated on the outer peripheral side of the PP-R pipe body, the polytetrafluoroethylene coating is coated on the inner peripheral side of the buffer layer, and the polytetrafluoroethylene coating is coated on the outer peripheral side of the thermosetting phenolic resin coating.

[0009] Furthermore, the thermosetting phenolic resin coating and the polytetrafluoroethylene coating have the same thickness.

[0010] Furthermore, the buffer layer is a rubber buffer layer or a sponge buffer layer, and the thickness of the buffer layer is greater than the thickness of the PP-R pipe body.

[0011] Furthermore, the anti-corrosion layer includes a connected tri-polyethylene coating and an acrylic polyurethane topcoat, the tri-polyethylene coating is coated on the outer peripheral side of the buffer layer, and the acrylic polyurethane topcoat is coated on the outer peripheral side of the tri-polyethylene coating.

[0012] Furthermore, the three-layer polyethylene coating and the acrylic polyurethane topcoat have the same thickness.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: by providing an antibacterial layer made of silver-loaded PAG-40 antibacterial agent, which is in direct contact with the water flow, the problem of bacterial growth caused by oxygen penetration or the water flow itself is effectively solved; by providing an insulation layer made of a connected thermosetting phenolic resin coating and a polytetrafluoroethylene coating, the PP-R pipe body can maintain a normal temperature in a low temperature environment, preventing the PP-R pipe body from being damaged due to low temperature, and at the same time, it can prevent the water flow in the PP-R pipe body from freezing due to low temperature, and at the same time ensure that the water flow flows at a relatively stable temperature, thereby stabilizing the internal pressure and preventing the PP-R pipe body from being damaged due to excessive internal pressure; by providing a buffer layer made of rubber or sponge, the PP-R pipe body can be effectively prevented from being damaged by extrusion when it is squeezed, thereby improving the compressive resistance of the PP-R pipe body and thus increasing the service life of the PP-R pipe body; by providing an anti-corrosion layer made of a connected tri-polyethylene coating and an acrylic polyurethane topcoat, the external environment can be effectively prevented from corroding the PP-R pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 A schematic structural diagram of an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of a cross-sectional structure provided for an embodiment of the present utility model;

[0017] Figure 3 A schematic diagram of the cross-sectional structure of the thermal insulation layer provided in an embodiment of the present utility model;

[0018] Figure 4 A schematic diagram of the cross-sectional structure of the anti-corrosion layer provided in an embodiment of the present utility model;

[0019] Description of reference numerals:

[0020] 1. Antibacterial layer; 2. PP-R pipe body; 3. Insulation layer; 31. Thermosetting phenolic resin coating; 32. Polytetrafluoroethylene coating; 4. Buffer layer; 5. Anti-corrosion layer; 51. Trifluoroethylene coating; 52. Acrylic polyurethane topcoat. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] See also Figure 1-4 The embodiment of the present invention provides a pressure-resistant PP-R hot and cold water pipe, comprising a PP-R pipe body 2, an antibacterial layer 1 being provided on the inner circumference of the PP-R pipe body 2, an insulation layer 3 being provided on the outer circumference of the PP-R pipe body 2, a buffer layer 4 being provided on the outer circumference of the insulation layer 3, and an anti-corrosion layer 5 being provided on the outer circumference of the buffer layer 4.

[0023] An antibacterial layer 1 is provided on the inner circumference of the PP-R pipe body 2. The material is a silver-loaded PAG-40 antibacterial agent coating layer, which is coated on the inner circumference of the PP-R pipe body 2 with a thickness of 0.05mm-0.1mm. It is in direct contact with the water flow and can effectively prevent bacteria from growing due to changes in water temperature or oxygen penetration.

[0024] An insulation layer 3 is provided on the outer peripheral side of the PP-R pipe body 2, which is composed of a thermosetting phenolic resin coating and a polytetrafluoroethylene coating 32 connected together. The thermosetting phenolic resin coating 31 is coated on the outer peripheral side of the PP-R pipe body 2, and the polytetrafluoroethylene coating 32 is coated on the inner side of the buffer layer 4. The polytetrafluoroethylene coating 32 is coated on the outer peripheral side of the thermosetting phenolic resin coating 31. The thermosetting phenolic resin coating 31 and the polytetrafluoroethylene coating 32 have the same thickness, both of which are 0.03mm-0.04mm, so that the PP-R pipe body 2 can maintain a normal temperature in a low temperature environment and prevent the PP-R pipe body 2 from being damaged due to low temperature. At the same time, it can keep the water flow in the PP-R pipe body 2 from freezing due to low temperature, so that the PP-R hot and cold water pipes can work normally. At the same time, the insulation layer 3 can ensure that the water flows at a relatively stable temperature, thereby stabilizing the internal pressure and preventing the internal pressure of the PP-R pipe body 2 from being too high and causing damage to the pipe body.

[0025] A buffer layer 4 is provided on the outer peripheral side of the thermal insulation layer 3. The material is rubber or sponge and is provided with a number of regular hexagonal small holes. The weight of the buffer layer 4 can be reduced without reducing the buffering performance, saving materials and reducing costs. Its thickness is greater than the thickness of the PP-R pipe body 2. When the PP-R pipe body 2 is squeezed or subjected to external impact force, the external impact force can be effectively reduced to prevent the PP-R pipe body 2 from being squeezed and damaged, thereby improving the compressive resistance of the PP-R pipe body 2 and increasing the service life of the PP-R pipe body 2.

[0026] An anti-corrosion layer is provided on the outer peripheral side of the buffer layer 4, which is composed of a three-polyethylene coating 51 and an acrylic polyurethane topcoat 52. The three-polyethylene coating 51 is coated on the outer peripheral side of the buffer layer 4, and the acrylic polyurethane topcoat 52 is coated on the outer peripheral side of the three-polyethylene coating 51. The three-polyethylene coating 51 and the acrylic polyurethane topcoat 52 have the same thickness, both of which are 0.03mm-0.04mm, which can effectively prevent the external environment from corroding the PP-R pipe body 2.

[0027] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pressure-resistant PP-R hot and cold water pipe, characterized in that: The invention comprises a PP-R pipe body (2), wherein an antibacterial layer (1) is provided on the inner peripheral side of the PP-R pipe body (2), a heat-insulating layer (3) is provided on the outer peripheral side of the PP-R pipe body (2), a buffer layer (4) is provided on the outer peripheral side of the heat-insulating layer (3), and an anti-corrosion layer (5) is provided on the outer peripheral side of the buffer layer (4).

2. A pressure-resistant PP-R hot and cold water pipe according to claim 1, characterized in that: The antibacterial layer (1) is a silver-loaded PAG-40 antibacterial agent coating layer, and the thickness of the silver-loaded PAG-40 antibacterial agent coating layer is 0.5 mm to 0.6 mm.

3. A pressure-resistant PP-R hot and cold water pipe according to claim 1, characterized in that: The thermal insulation layer (3) comprises a connected thermosetting phenolic resin coating (31) and a polytetrafluoroethylene coating (32); the thermosetting phenolic resin coating (31) is coated on the outer peripheral side of the PP-R pipe body (2); the polytetrafluoroethylene coating (32) is coated on the inner peripheral side of the buffer layer (4); and the polytetrafluoroethylene coating (32) is coated on the outer peripheral side of the thermosetting phenolic resin coating (31).

4. A pressure-resistant PP-R hot and cold water pipe according to claim 3, characterized in that: The thermosetting phenolic resin coating (31) and the polytetrafluoroethylene coating (32) have the same thickness.

5. A pressure-resistant PP-R hot and cold water pipe according to claim 1, characterized in that: The buffer layer (4) is a rubber buffer layer or a sponge buffer layer, and the thickness of the buffer layer (4) is greater than the thickness of the PP-R pipe body (2).

6. A pressure-resistant PP-R hot and cold water pipe according to claim 1, characterized in that: The anti-corrosion layer (5) comprises a connected tri-polyethylene coating (51) and an acrylic polyurethane topcoat (52), wherein the tri-polyethylene coating (51) is coated on the outer peripheral side of the buffer layer (4), and the acrylic polyurethane topcoat (52) is coated on the outer peripheral side of the tri-polyethylene coating (51).

7. A pressure-resistant PP-R hot and cold water pipe according to claim 6, characterized in that: The three polyethylene coatings (51) and the acrylic polyurethane topcoat (52) have the same thickness.

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