CN218954238U

CN218954238U - Heat-insulating corrosion-resistant PP-R pipe

Info

Publication number: CN218954238U
Application number: CN202222690960.8U
Authority: CN
Inventors: 汤锦; 汤仕尧; 石向云; 童祀丰; 周立军; 卢可萍
Original assignee: Zhejiang Jinyu Fengye Pipe Ind Co ltd
Current assignee: Zhejiang Jinyu Fengye Pipe Ind Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-05-02
Anticipated expiration: 2032-10-13

Abstract

The utility model relates to the field of pipelines, in particular to a heat-insulating corrosion-resistant PP-R (Polypropylene-R) pipe, which comprises a PP-R inner pipe, wherein four bulges with semicircular cross sections are respectively and equidistantly distributed on the inner side end surface and the outer side end surface of the PP-R inner pipe, a first inner cavity is formed in the PP-R inner pipe, a first polyurethane foaming layer is embedded in the first inner cavity, and a PP-R outer pipe layer is arranged on the outer side end surface of the PP-R inner pipe.

Description

Heat-insulating corrosion-resistant PP-R pipe

Technical Field

The utility model relates to the field of pipelines, in particular to a heat-insulating corrosion-resistant PP-R pipe.

Background

The pipe produced by the PP-R raw material is also called a random copolymer polypropylene pipe, has the advantages of light weight, corrosion resistance and the like, and is widely prepared into various plastic pipes at present, however, the defects of the existing PP-R pipe are gradually exposed in the long-term use process, and the corrosion in the pipe is caused by long-time corrosion of fluid transported in the inner side wall of the pipe, so that the integral strength of the pipe is influenced, and meanwhile, the heat insulation performance of the pipe is poor in the transportation process, so that the heat energy is seriously emitted in the transportation process, and the loss is larger.

Disclosure of Invention

The utility model aims to provide a heat-insulating corrosion-resistant PP-R pipe so as to solve the problems in the background technology.

The utility model solves the technical problems by adopting the following technical scheme:

the utility model provides a thermal-insulated corrosion-resistant PP-R pipe, includes the PP-R inner tube, the inboard terminal surface of PP-R inner tube and outside terminal surface equidistance respectively distribute and be provided with four cross-sections and be semicircular arch, be provided with first inner chamber in the PP-R inner tube, the embedding is provided with first polyurethane foaming layer in the first inner chamber, the outside terminal surface of PP-R inner tube is provided with the PP-R outer tube, the PP-R outer tube with be provided with four second inner chambers between the outside terminal surface of PP-R inner tube, every second polyurethane foaming layer has been set firmly respectively in the second inner chamber, the outside wearing layer is fixed to the outside terminal surface of PP-R outer tube, the inside terminal surface coating of PP-R inner tube is provided with anticorrosive coating.

Preferably, the PP-R inner tube comprises a PP-R inner tube a and a PP-R inner tube b, the first inner cavity is formed by enclosing the PP-R inner tube a and the PP-R inner tube b, and the PP-R inner tube a and the PP-R inner tube b are fixedly connected through the first polyurethane foaming layer, so that a thickened area of the first polyurethane foaming layer is firstly placed at a groove part on the outer side of the PP-R inner tube a, and then the PP-R inner tube b covers the outer side end surface of the first polyurethane foaming layer for fixedly connecting, thereby forming internal heat insulation and heat preservation.

Preferably, the PP-R outer pipe layer is provided with four grooves near the end surface of the PP-R inner pipe in the direction of the central line, and corresponds to the second polyurethane foaming layers, and the outer end surface of each second polyurethane foaming layer is embedded into the groove.

Preferably, two ends of each second polyurethane foaming layer are respectively abutted against the protrusions on the outer side of the PP-R inner tube b, so that fixing and limiting are formed, and the strength of the PP-R tube is greatly improved.

Preferably, the whole cross section of the first polyurethane foaming layer is annular, and thickened areas are respectively arranged at the four annular quadrant positions, so that when the pipeline is subjected to external impact force, the first polyurethane foaming layer is extruded, and therefore when the first polyurethane foaming layer is slightly deformed, certain release can be realized in the first inner cavity, and breakage and damage are avoided.

Preferably, the density of the first polyurethane foaming layer is 35kg/m ³ The density of the second polyurethane foaming layer is twice that of the first polyurethane foaming layer, and the second polyurethane foaming layer not only keeps heat, but also can support and buffer to a certain extent.

Preferably, the anti-corrosion coating is formed by firstly coating an asphalt coating on the inner side end surface of the inner side of the PP-R inner pipe a and then spraying a polyethylene anti-corrosion coating.

The utility model has the advantages and positive effects that:

according to the utility model, the protrusions are arranged at the quadrant positions of the inner end surface and the outer end surface of the PP-R inner pipe of the inner main pipe of the pipeline, so that the compressive strength of the pipeline can be greatly enhanced, meanwhile, the positioning during assembly is convenient, the first polyurethane foaming layer is arranged in the PP-R inner pipe, the second polyurethane foaming layer is arranged on the outer side for double heat insulation, the heat insulation effect during pipeline transportation is greatly improved, the heat energy loss during transportation is greatly reduced, the energy is saved, the consumption is reduced, and meanwhile, the corrosion of the inner anticorrosive layer can be effectively avoided, so that the pipeline is damaged due to corrosion in the long-time use process.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of a front view structure of an overall section of a heat-insulating corrosion-resistant PP-R pipe according to the present utility model;

FIG. 2 is a schematic view of a partial enlarged structure of the portion A in FIG. 1 according to the present utility model;

FIG. 3 is a schematic view showing the expanded structure of the PP-R inner tube 10 of FIG. 1 according to the present utility model.

The index marks in the drawings are as follows: 10. a PP-R inner tube; 11. a first polyurethane foam layer; 12. a second polyurethane foam layer; 13. a PP-R outer tube layer; 14. an outer wear layer; 15. a second lumen; 16. a first lumen.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

The utility model will now be described in detail with reference to fig. 1-3, wherein for convenience of description the orientations described below are now defined as follows: the vertical, horizontal, vertical, front-to-back directions described below are the same as the vertical, horizontal, vertical, and horizontal directions of the view of fig. 1. Fig. 1 is a front view of the device of the present utility model, and the direction of fig. 1 is the same as the vertical, horizontal, vertical, front-to-back, horizontal, and horizontal directions of the device of the present utility model.

Embodiments of the utility model are described in further detail below with reference to the attached drawing figures:

referring to fig. 1-3, an embodiment of the present utility model is provided: the utility model provides a thermal-insulated corrosion-resistant PP-R pipe, includes PP-R inner tube 10, PP-R inner tube 10 inboard terminal surface and outside terminal surface equidistance respectively distributes and is provided with four cross-sections and be semicircular arch, be provided with first inner chamber 16 in the PP-R inner tube 10, the embedding is provided with first polyurethane foam layer 11 in the first inner chamber 16, PP-R inner tube 10 outside terminal surface is provided with PP-R outer tube layer 13, PP-R outer tube layer 13 with be provided with four second inner chambers 15 between the PP-R inner tube 10 outside terminal surface, every second polyurethane foam layer 12 has been set firmly respectively in the inner chamber 15, PP-R outer tube layer 13 outside terminal surface is fixed to be provided with outside wearing layer 14, PP-R inner tube 10 inboard terminal surface coating is provided with anticorrosive coating.

In addition, in one embodiment, the PP-R inner pipe 10 includes a PP-R inner pipe a and a PP-R inner pipe b, the first inner cavity 16 is formed by enclosing the PP-R inner pipe a and the PP-R inner pipe b, and the PP-R inner pipe a and the PP-R inner pipe b are fixedly connected through the first polyurethane foam layer 11, so that the thickened area of the first polyurethane foam layer 11 is placed at the groove portion outside the PP-R inner pipe a, and then the PP-R inner pipe b covers the outer end surface of the first polyurethane foam layer 11 for being fixedly connected, thereby forming the internal heat insulation and preservation.

In addition, in one embodiment, the PP-R outer pipe layer 13 is provided with four grooves near the end surface of the PP-R inner pipe 10 in the direction of the center line, and the grooves correspond to the second polyurethane foam layers 12, and the outer end surface of each second polyurethane foam layer 12 is embedded in the groove.

In addition, in one embodiment, two ends of each second polyurethane foaming layer 12 are respectively abutted against the protrusions on the outer side of the PP-R inner pipe b, so that fixing and limiting are formed, and the strength of the PP-R pipe is greatly improved.

In addition, in one embodiment, the cross section of the first polyurethane foam layer 11 is in a ring shape, and thickened areas are respectively arranged at the four quadrant positions of the ring shape, so that when the pipeline receives external impact force, the first polyurethane foam layer 11 is extruded, and when the pipeline is slightly deformed, the first inner cavity 16 can be released to a certain extent, and breakage and damage are avoided.

In addition, in one embodiment, the first polyurethane foam layer 11 has a density of 35kg/m ³ The density of the second polyurethane foam layer 12 is twice that of the first polyurethane foam layer 11, and the second polyurethane foam layer 12 not only keeps heat but also can support and buffer to a certain extent.

In addition, in one embodiment, the anti-corrosion coating is formed by firstly coating an asphalt coating layer on the inner side end surface of the inner side of the PP-R inner pipe a and then spraying a polyethylene anti-corrosion coating layer.

The bulge is arranged at the quadrant position of the inner end face and the outer end face of the PP-R inner pipe 10 of the inner main pipe of the pipeline, so that the compressive strength of the pipeline can be greatly enhanced, meanwhile, the positioning during assembly is convenient, the first polyurethane foam layer 11 is arranged in the PP-R inner pipe 10, the second polyurethane foam layer 12 is arranged on the outer side for double heat insulation, the heat insulation effect during pipeline transportation is greatly improved, the heat energy loss during transportation is greatly reduced, the energy is saved, the consumption is reduced, and meanwhile, the corrosion of the inner anticorrosive layer during long-time use of the pipeline can be effectively avoided, so that the pipeline is damaged.

It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the utility model is not limited to the examples described in the detailed description, but rather falls within the scope of the utility model as defined by other embodiments derived from the technical solutions of the utility model by those skilled in the art.

Claims

1. The utility model provides a thermal-insulated corrosion-resistant PP-R pipe, includes PP-R inner tube (10), its characterized in that: four protrusions with semicircular cross sections are respectively distributed on the inner side end face and the outer side end face of the PP-R inner tube (10) at equal intervals, a first inner cavity (16) is arranged in the PP-R inner tube (10), a first polyurethane foaming layer (11) is embedded in the first inner cavity (16), a PP-R outer tube layer (13) is arranged on the outer side end face of the PP-R inner tube (10), four second inner cavities (15) are arranged between the PP-R outer tube layer (13) and the outer side end face of the PP-R inner tube (10), a second polyurethane foaming layer (12) is respectively fixed in each second inner cavity (15), an outer wear-resisting layer (14) is fixedly arranged on the outer side end face of the PP-R outer tube layer (13), and an anti-corrosion coating is coated on the inner side end face of the PP-R inner tube (10).

2. The insulated corrosion-resistant PP-R pipe of claim 1, wherein: the PP-R inner tube (10) comprises a PP-R inner tube a and a PP-R inner tube b, the first inner cavity (16) is formed by encircling the PP-R inner tube a and the PP-R inner tube b, and the PP-R inner tube a and the PP-R inner tube b are fixedly connected through the first polyurethane foaming layer (11).

3. The insulated corrosion-resistant PP-R pipe of claim 1, wherein: four grooves are respectively formed in the end face, close to the central line direction, of the PP-R outer pipe layer (13) and corresponding to the second polyurethane foaming layers (12), and the outer end face of each second polyurethane foaming layer (12) is respectively embedded into each groove.

4. The insulated corrosion-resistant PP-R pipe of claim 2, wherein: two ends of each second polyurethane foaming layer (12) are respectively abutted against the protrusions on the outer side of the PP-R inner pipe b.

5. The insulated corrosion-resistant PP-R pipe of claim 1, wherein: the whole cross section of the first polyurethane foaming layer (11) is in a ring shape, and thickening areas are respectively arranged at the four annular quadrant positions.

6. The insulated corrosion-resistant PP-R pipe of claim 1, wherein: the density of the first polyurethane foaming layer (11) is 35kg/m ³ The density of the second polyurethane foam layer (12) is twice that of the first polyurethane foam layer (11).

7. The insulated corrosion-resistant PP-R pipe of claim 1, wherein: the anti-corrosion coating is formed by firstly coating an asphalt coating on the inner side end surface of the inner side of the PP-R inner pipe a and then spraying a polyethylene anti-corrosion coating.