CN203223653U

CN203223653U - Prefabricated direct-buried insulating pipe

Info

Publication number: CN203223653U
Application number: CN 201320017275
Authority: CN
Inventors: 顾景磊; 田丽华; 何国平; 乐良红
Original assignee: NINGBO WANLI PIPE CO Ltd
Current assignee: NINGBO WANLI PIPE CO Ltd
Priority date: 2013-01-14
Filing date: 2013-01-14
Publication date: 2013-10-02
Anticipated expiration: 2023-01-14

Abstract

The utility model provides a prefabricated direct-buried insulating pipe with a better heat preservation effect and the pipe solves a problem of general heat preservation effect of prefabricated direct-buried insulating pipes in the prior art. The prefabricated direct-buried insulating pipe comprises a core pipe, an inorganic insulating layer, an organic insulating layer and an external protecting layer, wherein the inorganic, organic insulating layers and the external protecting layer are wrapped outside the core pipe; and an insulating layer made by nanometer materials is arranged between the core pipe and the inorganic insulating layer. Besides the present inorganic and organic insulating layers performing heat preservation to medium in the core pipe, the prefabricated direct-buried insulating pipe provided by the utility model further adds an insulating layer made by nanometer materials to the outside of the core pipe, so heat preservation effect of multi-layer insulating is greatly improved; and meanwhile, room for air flowing is provided, so polyurethane foaming layer will not be carbonized, thereby exerting no influence on greening of buried area of the prefabricated direct-buried insulating pipe.

Description

Prefabricated direct-buried thermal insulation pipe

Technical field

The utility model relates to the heat-insulating pipe technical field, specifically, relates to a kind of prefabricated direct-buried thermal insulation pipe.

Background technique

Prefabricated direct-buried heat insulation pipe is that a kind of imbedding undergroundly can be used for the central heat supply industry for the tubing that medium heat-preserving is carried in the north, for example carries hot water, the steam of specified temp; Can be used for the central cooling industry in some area, south, for example carry as hot water and the cold water of power; Industrial, there is the medium in a lot of pipelines need be incubated transportation, for example, the length of oil is apart from transfer line, and oil must guarantee that uniform temperature could proper flow because viscosity is very high.

Existing prefabricated direct-buried thermal insulation pipe normally wraps up inorganic insulating layer, organic heat-insulating layer successively and realize insulation to flowing medium in the core pipe outside the core pipe, so heat insulation effect is comparatively general, can't use in the occasion that heat insulation effect is had relatively high expectations.

The model utility content

The utility model provides a kind of good heat insulation effect prefabricated direct-buried thermal insulation pipe at existing prefabricated direct-buried thermal insulation pipe heat insulation effect general problem comparatively.

The technical problem of the required solution of the utility model can be achieved through the following technical solutions:

A kind of prefabricated direct-buried thermal insulation pipe comprises the core pipe, is wrapped in core pipe outer inorganic insulating layer, organic heat-insulating layer and outer pillar successively, it is characterized in that: be provided with the nanometer material thermal insulation layer between described core pipe and the inorganic insulating layer.

In the utility model, described nanometer material thermal insulation layer is the aerosil felt.

In the utility model, described inorganic insulating layer is the calcium silicate heat-preserving layer.

In the utility model, described organic heat-insulating layer is the polyurethane foam layer.

In the utility model, described outer pillar is the outer pillar of steel pipe or plastics.

Prefabricated direct-buried thermal insulation pipe of the present utility model, except adopting existing inorganic insulating layer and organic heat-insulating layer be incubated the medium in the core pipe, also outside the core pipe, increased the nanometer material thermal insulation layer, multi-layer heat preserving makes heat insulation effect greatly improve, simultaneously, the space that air ventilation is arranged, carbonization can not take place in the polyurethane foam layer, can the greening at the prefabricated direct-buried thermal insulation pipe place of imbedding not exerted an influence.

Description of drawings

Further specify the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is structural representation of the present utility model.

Embodiment

In order to make technological means of the present utility model, creation characteristic, to reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Purport of the present utility model is, by the analysis to existing prefabricated direct-buried thermal insulation pipe insulating structure, finds the not good deficiency of existing prefabricated direct-buried thermal insulation pipe heat insulation effect, provides a kind of heat insulation effect good prefabricated direct-buried thermal insulation pipe by the utility model.

Prefabricated direct-buried thermal insulation pipe of the present utility model comprises core pipe 1, and core pipe 1 is wrapped with nanometer material thermal insulation layer 2, nanometer material thermal insulation layer 2 outer inorganic insulating layer 3, organic heat-insulating layer 4 and the outer pillars 5 of being enclosed with again successively.Therefore, direct-buried insulated pipe of the present utility model is compared with existing direct-buried insulated pipe, and the insulation level is more reasonable, and heat insulation effect is significantly improved, and has guaranteed that fed sheet of a media is in the insulation requirement of course of conveying in the core pipe 1.

In the utility model, be preferably employing Performances of Novel Nano-Porous material thermal insulating material aerosil felt for nanometer material thermal insulation layer 2, it is the minimum material of thermal conductivity in the solid known today, and is high temperature resistant, in light weight, have characteristics such as ductility is good, easy to operate, environmental protection.

In the utility model, be preferably for inorganic insulating layer 3 and adopt the calcium silicate heat-preserving layer, calcium silicate is the heat insulating material of a kind of white, hard, have that unit weight is light, intensity is high, thermal conductivity is little, high temperature resistant, corrosion-resistant, characteristics such as can cut, can saw.

In the utility model, be preferably employing polyurethane foam layer for organic heat-insulating layer 4, the rigid polyurethane foam is a kind of novel synthetic material with insulation and water-proof function, its thermal conductivity is low, 0.022～0.024W/(m Κ only), be equivalent to half of extruded sheet, be at present in all thermal insulating materials thermal conductivity minimum, therefore possess heat insulation effect preferably.

In the utility model, can adopt the outer pillar of steel pipe or plastics according to actual needs for outer pillar 5, for example, must adopt pillar outside the steel at high water level or the abundant area of surface water, the outer pillar material property of steel and tolerance dimension should meet concerned countries or industry standard, and outer surface of steel tube is done polishing rust-removal and handled.Can adopt the outer pillar of high-density polyethylene plastics, the outer pillar of glass fiber reinforced plastic, compound outer pillar etc. for the outer pillar of plastics.

Below only be described with regard to the utility model preferred embodiment, but can not be interpreted as it is limitations on claims.The utility model not only is confined to above embodiment, and its concrete structure allows to change.In a word, all various variations of doing in the protection domain of the utility model independent claims are all in protection domain of the present utility model.

Claims

1. prefabricated direct-buried thermal insulation pipe comprises the core pipe, is wrapped in core pipe outer inorganic insulating layer, organic heat-insulating layer and outer pillar successively, it is characterized in that: be provided with the nanometer material thermal insulation layer between described core pipe and the inorganic insulating layer.

2. prefabricated direct-buried thermal insulation pipe according to claim 1, it is characterized in that: described nanometer material thermal insulation layer is the aerosil felt.

3. prefabricated direct-buried thermal insulation pipe according to claim 1 and 2, it is characterized in that: described inorganic insulating layer is the calcium silicate heat-preserving layer.

4. prefabricated direct-buried thermal insulation pipe according to claim 1 and 2, it is characterized in that: described organic heat-insulating layer is the polyurethane foam layer.

5. prefabricated direct-buried thermal insulation pipe according to claim 1 and 2 is characterized in that: described outer pillar is the outer pillar of steel pipe or plastics.