CN204477518U - A kind of central air-conditioner prefabricated thermal insulation plastic composite pipe - Google Patents

Abstract

A kind of central air-conditioner prefabricated thermal insulation plastic composite pipe, belongs to hydrophily air-conditioning duct pipe technology field.It comprises composite pipe body, the perfusion of polyurethane foamed thermal-insulating layer is arranged on composite pipe body outer surface, external sheath layer is coated is arranged on polyurethane foamed thermal-insulating layer outer surface, and composite pipe body is made up of in a molten state extruding and moulding PP-R skin, fibre modification polypropylene layer and PP-R internal layer.The utility model is by adopting above-mentioned technology, be three-layer composite structure by interior working pipe composite pipe body, and polyurethane foamed thermal-insulating layer and PE external sheath layer are set outside composite pipe body, thoroughly solve the etching problem of conventional steel, guarantee that inner-walls of duct is smooth, less scaling, make carry system water quality be improved significantly, system cloud gray model maintenance workload, expense reduce greatly, pipeline and pipeline equipment run more stable, it has the features such as weather-proof, anti-aging, substantially prolongs the working life of whole pipe-line system.

Description

A prefabricated thermal insulation plastic composite pipe for central air-conditioning

technical field

The utility model belongs to the technical field of pipelines for water-medium air-conditioning, and in particular relates to a prefabricated heat-insulating plastic composite pipe for central air-conditioning with high strength and low expansion coefficient.

Background technique

The air conditioner needs to use pipes to transport liquid during the cooling and heating process, and must take heat preservation treatment. The traditional water-based air-conditioning pipelines use galvanized steel pipes or copper pipes, and insulation treatment is carried out on the construction site. During use, galvanized steel pipes cause "running, popping, dripping, and leaking" due to corrosion. At the same time, corrosion and scaling are likely to cause blockage of branch pipes, which greatly reduces the efficiency of air-conditioning operations. Many air-conditioning companies have begun to use new plastic pipes, such as PPR pipes, which have better solved the problem of pipe corrosion, and have low thermal conductivity and are more energy-saving. However, due to the large expansion coefficient of plastic pipes, dense supports need to be installed during pipe installation, and the construction is relatively cumbersome. On the other hand, traditional pipelines and pipeline insulation are purchased separately. Due to the limitations of people and site conditions, problems such as loose insulation layer and insufficient thickness of insulation layer are prone to occur, resulting in unsatisfactory insulation effect and condensed water. The entire pipe network needs maintenance every 2-3 years. The market urgently needs to develop a pipeline product with high rigidity, low expansion and good thermal insulation effect to upgrade the existing pipeline network.

Utility model content

Aiming at the above-mentioned problems in the prior art, the purpose of this utility model is to provide a prefabricated heat-insulating plastic composite pipe for central air-conditioning to solve technical problems such as corrosion of existing air-conditioning pipes, unsatisfactory heat-insulation effect and inconvenient installation.

The prefabricated thermal insulation plastic composite pipe for central air-conditioning includes a composite pipe body, a polyurethane foam insulation layer and a PE outer sheath layer, and is characterized in that the polyurethane foam insulation layer is poured and arranged on the outer surface of the composite pipe body , The PE outer sheath layer is covered and set on the outer surface of the polyurethane foam insulation layer.

The prefabricated thermal insulation plastic composite pipe for central air-conditioning is characterized in that the composite pipe body is a three-layer composite structure, which consists of a PP-R outer layer, a fiber-modified polypropylene layer and a PP-R inner layer that are melted One-time extrusion molding.

The prefabricated thermal insulation plastic composite pipe for central air-conditioning is characterized in that the wall thickness ratio of the three layers of the PP-R outer layer, the fiber-modified polypropylene layer and the PP-R inner layer is 2:5:3.

The above-mentioned prefabricated thermal insulation plastic composite pipe for central air-conditioning includes a composite pipe body, a polyurethane foam insulation layer and a PE outer sheath layer, the polyurethane foam insulation layer is poured and arranged on the outer surface of the composite pipe body, and the PE outer sheath layer covers Covered on the outer surface of the polyurethane foam insulation layer, the composite pipe body is composed of a PP-R outer layer, a fiber-modified polypropylene layer and a PP-R inner layer extruded in a molten state at one time. The utility model has the following beneficial effects by adopting the above-mentioned technology:

1) The utility model solves the influence of human factors in on-site insulation by setting a polyurethane foam insulation layer in the middle layer. The on-site installation is more convenient and quick, and the construction period is shortened. The design prevents condensation from the source.

2) The utility model has a certain protective effect on the polyurethane foam insulation layer by setting the PE outer sheath layer, and has the characteristics of weather resistance and anti-aging, which greatly prolongs the service life of the entire pipeline system;

3) The composite pipe body of the inner working pipe of the utility model has a three-layer composite structure, and a fiber-modified polypropylene layer is arranged between the PP-R inner layer and the PP-R outer layer, which reduces the linear expansion coefficient of the pipe and improves It improves the rigidity of the pipeline, completely solves the corrosion problem of traditional steel pipes, ensures that the inner wall of the pipeline is smooth, and is not easy to scale, so that the water quality of the conveying system is significantly improved, the workload and cost of system operation and maintenance are greatly reduced, and the operation of pipelines and pipeline equipment is more stable. , Straight and beautiful when installed.

Description of drawings

Fig. 1 is a schematic diagram of a transverse cross-sectional structure of the utility model.

In the figure: 1-PE outer sheath layer, 2-polyurethane foam insulation layer, 3-composite pipe body, 301-PP-R outer layer, 302-fiber modified polypropylene layer, 303-PP-R inner layer.

Detailed ways

The utility model is further described below in conjunction with the accompanying drawings of the description, but the protection scope of the utility model is not limited thereto:

As shown in Figure 1, the prefabricated thermal insulation plastic composite pipe for central air-conditioning of the present utility model comprises a composite pipe body 3, a polyurethane foam insulation layer 2 and a PE outer sheath layer 1, and the polyurethane foam insulation layer 2 is poured and set On the outer surface of the composite pipe body 3, the PE outer sheath layer 1 is coated on the outer surface of the polyurethane foam insulation layer 2; the composite pipe body 3 is a three-layer composite structure, which is made of PP-R outer layer 301, fiber modified PP-R outer layer 301, fiber modified polypropylene layer 302 and PP-R inner layer 303 have a wall thickness ratio of 2: 5:3.

As shown in the figure, the composite pipe body 3, the polyurethane foam insulation layer 2 and the PE outer sheath layer 1 are bonded to each other, and the PE outer sheath layer 1 is a high-density polyethylene outer sheath layer, and the material is Black PE100 pipe material, the composite pipe body 3 is an inner working pipe, which is composed of a PP-R outer layer 301, a fiber-modified polypropylene layer 302 and a PP-R inner layer 303 in a molten state. The material of the modified polypropylene layer 302 is a glass fiber reinforced random polypropylene layer, and the material of the polyurethane foam insulation layer 2 is a rigid polyurethane foam material, which is a waterproof, thermal insulation, heat insulation material. Integrated new materials.

The thermal insulation plastic composite pipe of the utility model adopts a continuous production process, and the PP-R outer layer 301, the fiber-modified polypropylene layer 302 and the PP-R inner layer 303 are extruded in a molten state through a three-layer co-extrusion technology. Obtain the composite pipe body 3, then pour the polyurethane foam insulation layer 2 on the outer surface of the composite pipe body 3, then cover the PE outer sheath pipe 1 on the outer surface of the polyurethane foam insulation layer 2, and finally cut into pipes. By adopting the above-mentioned technology, the utility model effectively avoids the common interface delamination problem of metal/plastic composite pipes, and solves the technical problems of the existing air-conditioning pipes such as easy corrosion, unsatisfactory heat preservation effect, and inconvenient installation. Aging and other characteristics greatly prolong the service life of the entire pipeline system; and its preparation cost is greatly reduced, the operation of pipelines and pipeline equipment is more stable, and the installation is straight and beautiful, suitable for popular applications.

Claims (2)

1. a central air-conditioner prefabricated thermal insulation plastic composite pipe, comprise composite pipe body (3), polyurethane foamed thermal-insulating layer (2) and PE external sheath layer (1), it is characterized in that described polyurethane foamed thermal-insulating layer (2) perfusion is arranged on composite pipe body (3) outer surface, PE external sheath layer (1) is coated is arranged on polyurethane foamed thermal-insulating layer (2) outer surface, described composite pipe body (3) is three-layer composite structure, is made up of in a molten state extruding and moulding PP-R skin (301), fibre modification polypropylene layer (302) and PP-R internal layer (303).

2. a kind of central air-conditioner prefabricated thermal insulation plastic composite pipe according to claim 1, is characterized in that described PP-R skin (301), fibre modification polypropylene layer (302) and PP-R internal layer (303) three layers of wall ratio are 2:5:3.