CN2227775Y

CN2227775Y - Directly-buried heat-proofing compound thermal insulating tube

Info

Publication number: CN2227775Y
Application number: CN95231645U
Authority: CN
Inventors: 李丛龙
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-05
Filing date: 1995-07-05
Publication date: 1996-05-22
Anticipated expiration: 2005-07-05

Abstract

The utility model relates to a directly-buried heat-proofing compound thermal insulating tube, comprising a pipeline, a radiation proof metal-foil layer on the outer surface of the pipeline, a heat-proofing layer of aluminium silicate fibre, a reinforcing thermal insulating layer of polyurethane foam and an outer shell of glass fibre reinforced plastics or PE material in turn from inside to outside, wherein, the heat-proofing layer of aluminium silicate fibre comprises the interlaced arrangement of at least one layer of aluminium silicate cellucotton and one layer of interlayer of radiation proof metal foil layer. The utility model has stable performance, long service life, short construction period, low cost, high efficiency and energy saving and conforms to the requirements of the legislation of environment and land.

Description

Direct-burried heat-proofing type high-temperature resistant composite thermal insulating tube

The utility model relates to a kind of delivering pipe, definite a kind of direct-burried heat-proofing type high-temperature resistant composite thermal insulating tube of saying so.

Existing industrial heat supply, refrigerant pipe adopt the thermal insulating material of glass fibre, silicates, plastics and polyurethane foaming body mostly, sometimes pipeline outer wall also is coated with and soaks cyanogen with fixed attention, difference because of material property and engineering construction method, the resistant to elevated temperatures direct-burried of pipeline remains in difficulty, and high-temperature pipe engineering cost height, long in time limit, insulating efficiency is low, year, maintenance expenses was big, and the problem of aspects such as befouling environment is still unresolved.The patent No. be 93229331.X's " compound thermal insulating pipe ", its structure is from inside to outside successively: steel pipe, rock wool pipe, clad aluminum foil, rigid foam and plastic tube are assembled by them; This structure be in the one-dimension temperature radiation the strongest place be the rock wool pipe, the absorptivity of rock wool is than higher, clad aluminum foil plays the antiradiation effect, but because stow away from heat, the existence of radiation angle, clad aluminum foil effect herein greatly descends; The limit safe working temperature of rock wool heat-preservation layer is 650 ℃, and for this reason, this compound thermal insulating pipe can only satisfy the operating temperature below 650 ℃.

The utility model is to provide a kind of direct-burried in underground, reduces engineering cost and cost, and the duration is short, long service life, and the later stage expense is minimum, meets environment, land use rules, and stable work in work, energy-efficient direct-burried heat-proofing type high-temperature resistant composite thermal insulating tube.

The technological scheme of model utility is achieved in that the structure of direct-burried heat-proofing type high-temperature resistant composite thermal insulating tube is followed successively by the shell formation of pipeline, pipeline external surface radiation proof metal foil layer, aluminum silicate fiber screening thermosphere, polyurethane foam reinforcing thermal insulation layer, glass fibre reinforced plastics or PE material from inside to outside, and it is by aluminosilicate fiber cotton of one deck and the interlayer radiation proof metal foil layer of one deck constitute alternately at least that aluminum silicate fiber hides thermosphere.

In the structure of the present utility model, the effective antiradiation energy of metal foil layer, radiation resistance is strengthened, played the effect of alleviating hyperthermia radiation intensity; What polyurethane foam was reinforced thermal insulation layer and housing composite structure adds solidity, moisture absorption, resistance to compression, the resistance to flexure of this thermal insulation pipe are improved, for direct-burried provides reliable assurance in underground, ageing resistance and corrosion resistance have prolonged the working life of thermal insulation pipe greatly, and usability is stable, duration is short, meets environment, soil laws and regulations requirement.

Fig. 1 is the structural representation of direct-burried heat-proofing type high-temperature resistant composite thermal insulating tube;

Fig. 2 is the structural representation that the aluminum silicate fiber of direct-burried heat-proofing type high-temperature resistant composite thermal insulating tube hides thermosphere 3.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.

As shown in Figure 1, the structure of direct-burried heat-proofing type high-temperature resistant composite thermal insulating tube is followed successively by the shell 5 of pipeline 1, pipeline external surface radiation proof metal foil layer 2, aluminum silicate fiber screening thermosphere 3, polyurethane foam reinforcing thermal insulation layer 4, glass fibre reinforced plastics or PE material from inside to outside.

As shown in Figure 2, aluminum silicate fiber screening thermosphere 3 is by aluminosilicate fiber cotton 6 of one deck and the interlayer radiation proof metal foil layer 7 of one deck constitute alternately at least.

Claims

1, direct-burried heat-proofing type high-temperature resistant composite thermal insulating tube, structure mainly comprises the shell 5 of pipeline 1, polyurethane foam reinforcing thermal insulation layer 4, glass fibre reinforced plastics or PE material, it is characterized in that: its structure comprises that also pipeline external surface radiation proof metal foil layer 2 and aluminum silicate fiber hide thermosphere 3, and the structure of this thermal insulation pipe is followed successively by the shell 5 of pipeline 1, pipeline external surface radiation proof metal foil layer 2, aluminum silicate fiber screening thermosphere 3, polyurethane foam reinforcing thermal insulation layer 4, glass fibre reinforced plastics or PE material from inside to outside.

2, direct-burried heat-proofing type high-temperature resistant composite thermal insulating tube according to claim 1 is characterized in that: it is by aluminosilicate fiber cotton 6 of one deck and the interlayer radiation proof metal foil layer 7 of one deck constitute alternately at least that aluminum silicate fiber hides thermosphere 3.