CN2898544Y

CN2898544Y - Composite sliding thermal-insulating structure in steam pipeline

Info

Publication number: CN2898544Y
Application number: CN 200620083146
Authority: CN
Inventors: 陆君利; 杨凯
Original assignee: SHANDONG DINGCHAO THERMOELECTRIC DESIGN CO Ltd; DINGCHAO HEATING PIPES Co Ltd BEIJING
Current assignee: SHANDONG DINGCHAO THERMOELECTRIC DESIGN CO Ltd; DINGCHAO HEATING PIPES Co Ltd BEIJING
Priority date: 2006-04-19
Filing date: 2006-04-19
Publication date: 2007-05-09
Anticipated expiration: 2016-04-19

Abstract

The utility model discloses a prefabricated directly-buried thermal-insulating pipeline for conveying steam medium, in particular to a composite sliding thermal-insulating structure in steam pipeline, which comprises in turn from inside to outside a wrought-steel pipe, a sliding cushion layer, an inorganic thermal-insulating layer, a hard polyurethane thermal-insulating layer and an external pipe, wherein, between the inorganic thermal-insulating layer and the hard polyurethane thermal-insulating layer a first radiation proof layer, a vertical ventilation layer and a second radiation proof layer are arranged in turn from inside to outside; the vertical ventilation layer adopts centrifugal glass cotton case; the surfaces of the first radiation proof layer and the second radiation proof layer are provided with a plurality of ventilative through holes. The utility model has the following reliable effects: (1) solving problem of poor dampness eduction of traditional composite sliding thermal-insulating structure, and (2) improving thermal-insulating effect of thermal-insulating pipeline.

Description

Slip compound insulation structure in the steam line

(1) technical field under

The utility model relates to a kind of prefabricated direct-buried thermal insulation pipe road of delivering vapor medium, slip compound insulation structure in particularly a kind of steam line.

(2) background technique

Current, interior slip compound insulation structure has obtained application more and more widely in especially northern most of area, the direct-burried field of district heat supply network.When underground water level is higher, require to take earlier strict dewatering measure before the construction.But during practice of construction, often be difficult to guarantee do not have moisture content to enter thermal insulating material.In addition, when insulation pipe imbed underground after, also can cause moisture content to enter because of factors such as local anticorrosion inefficacys breakage afterwards of outer pillar or weld defectss.If humidity discharging is obstructed, will cause heat insulation effect reduction, thermal insulating material to subside, even can cause pipe explosion accident.Interior slip compound insulation structure is compared with the outer slip insulating structure that has air layer, its humidity discharging ability relatively weak (this also is the most reasons that adopt outer slip insulating structure of southern area).

(3) summary of the invention

At the deficiency of current techniques, the utility model provides slip compound insulation structure in a kind of steam line.This insulating structure has not only solved traditional interior not smooth problem of slip compound insulation structure humidity discharging, and can play the protective action to inorganic heat insulation material.

The utility model is achieved by the following scheme:

Slip compound insulation structure in a kind of steam line, comprise working steel tube, slip bed course, inorganic insulating layer, hard polyaminoester thermal insulation layer, outer pillar from inside to outside successively, its special way is: be provided with first radiation protective layer, vertical unsaturated zone, second radiation protective layer between described inorganic insulating layer and the hard polyaminoester thermal insulation layer from inside to outside successively.

Slip compound insulation structure in the steam line of the present utility model, described vertical unsaturated zone adopts the centrifugally glass-wool shell.

Some ventilative through holes are left on described first radiation protective layer and the second radiation protective layer surface.

There are following characteristics in the utility model:

The one, the design of vertical unsaturated zone.

Relative hard polyaminoester of centrifugally glass-wool shell and inorganic heat insulation material that vertical unsaturated zone adopts, its moisture absorption is the most weak, and gas permeability is the strongest.Therefore, the centrifugally glass-wool shell can be with the water vapor sucking-off in the main thermal insulating material in this insulating structure, and moisture can concentrate in vertical unsaturated zone relatively, and the humidity discharging pipe that is arranged in vertical unsaturated zone by inlet can be discharged moisture rapidly again.In addition, in the tradition in the practical application of slip compound insulation structure, moisture content can make inorganic heat insulation material (as calcium silicate watt) become loose.When if the humidity discharging amount is big, inorganic heat insulation material can be discharged through the humidity discharging pipe with single short grained form, will cause that in the course of time partial insulation lost efficacy.The centrifugally glass-wool shell is arranged between inorganic heat insulation material and the humidity discharging tube inlet, can avoid the generation of above-mentioned phenomenon.

The 2nd, the design of radiation protective layer.

Heat transfer path has transmission of heat, convection current, three kinds of modes of thermal radiation.Wherein thermal radiation is not rely on any medium, all the time the heat transfer type that all exists and take place.To be the principle of utilizing reflection loss suppressed the measure that improves heat insulation effect to reach to the effect of this kind heat transfer to the design radiation protective layer.Radiation protective layer is to be made by the material with high reflectance and low absorptivity.Simultaneously, this material surface leaves a lot of ventilative through holes, so that the discharge of moisture.

Set up the twice radiation protective layer in the insulating structure of the present utility model with the vertical unsaturated zone that is beneficial to humidity discharging.Because increased the twice radiation protective layer in this insulating structure, this design is the effective measures that weaken the thermal radiation heat transfer type significantly, has further improved insulating power.

Therefore, reliable effect of the present utility model is: 1. the smooth problem of humidity discharging that has solved traditional interior slip compound insulation structure; 2. improved the heat insulation effect of insulation pipe.

(4) description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

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

Fig. 2 is the structural representation of vertical unsaturated zone in the utility model;

Fig. 3 is the structural representation of radiation protective layer in the utility model.

Among the figure, 1 outer pillar, 2 hard polyaminoester thermal insulation layers, 3 vertical unsaturated zones, 4 inorganic insulating layers, 5 slip bed courses, 6 working steel tubes, 7 first radiation protective layer, 8 second radiation protective layer.

(5) embodiment

Accompanying drawing is a kind of specific embodiment of the present utility model.As shown in Figure 1, this embodiment is made of working steel tube 6, slip bed course 5, inorganic insulating layer 4, first radiation protective layer 7, vertical unsaturated zone 3, second radiation protective layer 8, hard polyaminoester thermal insulation layer 2 and outer pillar 1 from inside to outside successively.

Its concrete working process following (with steel pipe outward the form of protecting be example):

A. working steel tube 6 being carried out impeller blasting handles;

B. wrap as 2 pairs of steel pipes of slip bed course with the alumina silicate felt;

C., calcium silicate watt is installed, and is tied up with iron wire;

D. wrap clad aluminum foil, form first radiation protective layer 7;

E. suit centrifugally glass-wool shell forms vertical unsaturated zone 3;

F. wrap clad aluminum foil, form second radiation protective layer 8;

G. utilize the outer pillar 1 of automatic poling machine suit steel, keep concentric with working steel tube 6;

H. lift paramount Hair Fixer bubble working platform, mounting end envelope and other auxiliary clamp;

I. utilize the high pressure foaming machine interior cavity inner high voltage foaming of pillar outside.

Claims

1. slip compound insulation structure in the steam line, comprise working steel tube (6), slip bed course (5), inorganic insulating layer (4), hard polyaminoester thermal insulation layer (2), outer pillar (1) from inside to outside successively, it is characterized in that: be provided with first radiation protective layer (7), vertical unsaturated zone (3), second radiation protective layer (8) between described inorganic insulating layer (4) and the hard polyaminoester thermal insulation layer (2) from inside to outside successively.

2. slip compound insulation structure in the steam line according to claim 1 is characterized in that: described vertical unsaturated zone (3) adopts the centrifugally glass-wool shell.

3. slip compound insulation structure in the steam line according to claim 1, it is characterized in that: some ventilative through holes are left on described first radiation protective layer (7) and second radiation protective layer (8) surface.