CN219242991U

CN219242991U - Thermal insulation pipe of composite polyurethane

Info

Publication number: CN219242991U
Application number: CN202320122917.3U
Authority: CN
Inventors: 李红领; 余伟昊
Original assignee: Guangzhou Colortech New Materials Co ltd
Current assignee: Guangzhou Colortech New Materials Co ltd
Priority date: 2023-02-06
Filing date: 2023-02-06
Publication date: 2023-06-23
Anticipated expiration: 2033-02-06

Abstract

The utility model discloses a composite polyurethane heat-insulating pipe, which relates to the technical field of conveying pipelines and comprises an outer pipe and an inner pipe which are arranged from outside to inside, wherein the outer surface of the inner pipe is provided with a heat-insulating layer, an anti-corrosion layer and a sun-proof layer from inside to outside; the outer tube is characterized in that a containing groove is formed in the wall of the outer tube, a supporting frame is arranged in the containing groove, the supporting frame comprises an annular structure and a plurality of trapezoid structures arranged on the outer surface of the annular structure, the trapezoids are distributed on the outer surface of the annular structure at intervals, and the annular structure and the trapezoid structures are of an integrated structure.

Description

Thermal insulation pipe of composite polyurethane

Technical Field

The utility model relates to the field of conveying pipelines, in particular to a composite polyurethane heat-insulating pipe.

Background

The heat insulating pipe is used for conveying liquid, gas and other mediums, and is widely used in heat insulating engineering of petroleum, chemical industry, spaceflight, hot spring, military, central heating, central air conditioner, municipal and other pipelines, so the importance of heat insulating performance is self-evident.

Most of the heat-insulating pipes are buried in the ground, the situation in the ground is changed, and the heat-insulating pipes are easy to bear larger pressure, so that the heat-insulating materials in the heat-insulating pipes are required to have high bearing capacity.

The polyurethane rigid foam is a novel synthetic environment-friendly material with heat preservation function and high bearing capacity, and has the advantages of numerous advantages, low heat conductivity, outstanding heat preservation performance, high strength, strong bearing capacity, water resistance, corrosion resistance, light weight and simple and convenient processing.

Disclosure of Invention

The utility model discloses a composite polyurethane heat-insulating pipe, which aims to solve the technical problem that the heat-insulating pipe is damaged by compression.

In order to solve the technical problems, the utility model provides the following optimization technical scheme:

the heat-insulating pipe comprises an outer pipe and an inner pipe which are arranged from outside to inside, wherein the outer surface of the inner pipe is provided with a heat-insulating layer, an anti-corrosion layer and a sun-proof layer from inside to outside;

the outer tube is characterized in that a containing groove is formed in the wall of the outer tube, a supporting frame is arranged in the containing groove, the supporting frame comprises an annular structure and a plurality of trapezoid structures arranged on the outer surface of the annular structure, the trapezoids are distributed on the outer surface of the annular structure at intervals, and the annular structure and the trapezoid structures are of an integrated structure.

Further, a connecting terminal is arranged at one end of the inner tube, and the outer surface of the connecting terminal is rectangular in outline; an extension part is arranged at one end of the outer tube, which is far away from the connecting terminal, a connecting groove which is arranged along the axial direction of the extension part is arranged at the center of the extension part, and the shape and the size of the connecting groove are matched with the connecting terminal; one insulating pipe is inserted into the connecting groove of the other insulating pipe through the connecting terminal so as to connect the two insulating pipes.

Further, the center of the connecting terminal is provided with a working hole arranged along the axial direction of the connecting terminal, and the working hole is communicated with the inner hole of the inner tube.

Further, the connection groove is communicated with the inner hole of the inner tube.

Further, the outer tube is made of high-density ethylene.

Further, the inner tube is made of polyurethane rigid foam materials.

Further, the support frame is made of rubber.

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

the heat-insulating pipe provided by the utility model is provided with the supporting frame, the supporting frame is composed of the annular structure and the trapezoid structure, and the trapezoid structure is arranged on the outer surface of the annular structure, so that when the heat-insulating pipe is stressed, the pressure acts on the outer pipe and acts on the trapezoid structure, and as the trapezoid structure is of a structure with a narrow upper part and a wide lower part, the pressure acts on one narrow surface, and then is transmitted to the wide surface from the narrow surface, namely the pressure is diffused, the pressure dispersed to the annular structure is far smaller than the pressure acting on the narrow surface of the trapezoid, thereby the supporting frame plays a role in reducing pressure, the heat-insulating pipe can bear larger pressure, and the heat-insulating pipe is also protected.

Drawings

Fig. 1 is a schematic diagram of the structure of the present utility model.

Fig. 2 is a schematic diagram of a second embodiment of the present utility model.

Fig. 3 is an axial cross-sectional view of the inner tube of the present utility model.

Fig. 4 is a radial cross-sectional view of the outer tube of the present utility model.

In the figure: 1. an outer tube; 2. an inner tube; 3. a heat preservation layer; 4. a thermal insulation layer; 5. an anti-corrosion layer; 6. a sun protection layer; 7. a receiving groove; 8. a support frame; 9. a ring-shaped structure; 10. a trapezoid structure; 11. a connection terminal; 12. an extension; 13. a connection groove; 14. a working hole.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

Referring to fig. 1-4, the composite polyurethane heat-insulating pipe comprises an outer pipe 1 and an inner pipe 2 which are arranged from outside to inside, wherein the outer surface of the inner pipe 2 is provided with a heat-insulating layer 3, a heat-insulating layer 4, a corrosion-resistant layer 5 and a sun-proof layer 6 from inside to outside, the heat-insulating layer 3 is made of polyurethane foam plastic, the heat-insulating effect is good, the bearing capacity is strong, the heat-insulating layer 4 is made of aerogel felt, the heat-insulating performance is good, the outer corrosion-resistant layer 5 is made of anti-rust paint, the corrosion resistance of an outer sleeve can be effectively improved, the sun-resistant layer 6 is made of tin foil, ultraviolet light can be effectively shielded, heat radiation is reduced, and ageing of a pipeline is prevented;

the wall of the outer tube 1 is internally provided with a containing groove 7, the containing groove 7 is internally provided with a supporting frame 8, the supporting frame 8 comprises an annular structure 9 and a plurality of trapezoid structures 10 arranged on the outer surface of the annular structure 9, the trapezoids are distributed on the outer surface of the annular structure 9 at intervals, and the annular structure 9 and the trapezoid structures 10 are of an integrated structure; when the heat preservation pipe receives pressure, the pressure acts on the outer pipe 1 and acts on the trapezoid structure 10, because the trapezoid structure 10 is narrow in the upper portion and wide in the lower portion, the pressure acts on the narrow side, and the pressure is transferred to the wide side from the narrow side, namely, the pressure is diffused, and the pressure dispersed to the annular structure 9 is far smaller than the pressure acting on the narrow side of the trapezoid, so that the support frame 8 plays a role in reducing pressure, the heat preservation pipe can bear larger pressure, and the heat preservation pipe is also protected.

It should be noted that, the shape and size of the accommodating groove 7 are adapted to the supporting frame 8, so as to ensure that the supporting frame 8 can accommodate the supporting frame 8; the receiving groove 7 does not penetrate both ends of the outer tube 1. The outer tube 1 and the inner tube 2 are bonded by conventional bonding means, such as hot melt, etc.

In this embodiment, a connection terminal 11 is disposed at one end of the inner tube 2, and an outer surface of the connection terminal 11 has a rectangular profile; an extension part 12 is arranged at one end of the outer tube 1 far away from the connecting terminal 11, a connecting groove 13 arranged along the axial direction of the extension part 12 is arranged at the center of the extension part 12, and the shape and the size of the connecting groove 13 are matched with those of the connecting terminal 11; one insulating pipe is inserted into the connecting groove 13 of the other insulating pipe through the connecting terminal 11 so that the two insulating pipes are connected. The profile of connecting terminal 11 is the rectangle, and connecting groove 13 is the rectangle recess, when passing through the grafting mode with two insulating tubes and connecting, two insulating tubes can not take place relative rotation, and the connection is more firm, and after the grafting is accomplished simultaneously, adopts hot melt or other bonding mode connection fixed in the outer tube 1 contact department of two insulating tubes.

In this embodiment, the center of the connection terminal 11 is provided with a working hole 14 disposed along the axial direction thereof, and the working hole 14 communicates with the inner hole of the inner tube 2, so as to ensure the communication between the insulating tube and the insulating tube.

In this embodiment, the connecting groove 13 is communicated with the inner hole of the inner tube 2, so as to ensure the communication between the heat-insulating pipes.

In this embodiment, the outer tube 1 is made of high-density ethylene, and the high-density polyethylene outer tube 1 has better waterproof performance and compression resistance, so that the heat insulation tube is not easy to break or deform. The high-density polyethylene outer tube 1 has good corrosion resistance, insulation and mechanical properties. Therefore, the insulating pipe is hardly eroded by the outside air and water.

In this embodiment, the inner tube 2 is made of polyurethane rigid foam, and the polyurethane rigid foam is a novel synthetic environment-friendly material with heat insulation function and high bearing capacity, and has numerous advantages, low heat conductivity, outstanding heat insulation performance, high strength, strong bearing capacity, water resistance, corrosion resistance, light weight and simple processing. The polyurethane rigid foam inner tube 2 has outstanding heat preservation effect and supporting strength.

In this embodiment, the supporting frame 8 is made of rubber, and the rubber supporting frame 8 has a certain elasticity and can absorb a certain stress.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The composite polyurethane heat-insulating pipe is characterized by comprising an outer pipe and an inner pipe which are arranged from outside to inside, wherein the outer surface of the inner pipe is provided with a heat-insulating layer, an anti-corrosion layer and a sun-proof layer from inside to outside;

2. The composite polyurethane insulation pipe according to claim 1, wherein one end of the inner pipe is provided with a connecting terminal, and the outer surface of the connecting terminal is rectangular; an extension part is arranged at one end of the outer tube, which is far away from the connecting terminal, a connecting groove which is arranged along the axial direction of the extension part is arranged at the center of the extension part, and the shape and the size of the connecting groove are matched with the connecting terminal; one insulating pipe is inserted into the connecting groove of the other insulating pipe through the connecting terminal so as to connect the two insulating pipes.

3. The heat preservation pipe of composite polyurethane according to claim 2, wherein the center of the connecting terminal is provided with a working hole arranged along the axial direction of the connecting terminal, and the working hole is communicated with the inner hole of the inner pipe.

4. The composite polyurethane insulation pipe of claim 2, wherein the connection groove is in communication with the inner bore of the inner pipe.

5. The composite polyurethane insulation pipe of claim 1, wherein the outer pipe is a high density ethylene material.

6. The composite polyurethane insulation pipe of claim 1, wherein the inner pipe is a polyurethane rigid foam.

7. The composite polyurethane insulation pipe of claim 1, wherein the support is made of rubber.