CN2491686Y

CN2491686Y - Directly buried precast thermal pipe with steel anti-corrosion lining

Info

Publication number: CN2491686Y
Application number: CN 01228450
Authority: CN
Inventors: 张吉庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-06
Filing date: 2001-07-06
Publication date: 2002-05-15
Anticipated expiration: 2011-07-06

Abstract

The utility model relates to a preformed heat-preservation tube of direct-buried type used as a lining for preservation of steel, belonging to composite tube materials of which two ends are arranged with flange openings or screw threads. The innermost layer is an antiseptic lining (1), the middle layer is an iron steel layer (2), the outermost belongs to a heat-preservation layer (3), and an outer casing (4) is arranged outside the heat-preservation layer. Compared with the existing technology, the utility model has the advantages that the transmission of pluralities of media including various corrosive media can be satisfied, the working life is greatly improved by employing the lining instead of employing a painting for conservation, besides the utility model has the advantages of convenient construction, reduced costs, heat-preserving property, and corrosion prevention. The employment of the method of direct-burying, the utility model enables the using rate of the land to be great and the influence to environment is small.

Description

Steel corrosion-proof lining directly buried type is heat preservation pipe prefabricated

Technical field:

The utility model belongs to the structure of medium transport pipeline.

Background technique:

Outer insulation direct-burried steel pipe, internal lining pipe all is the tubing that often uses, and Chinese patent CN2313144 discloses a kind of refractory composite heat insulating direct buried pipe, has also just carried out high temperature resistant processing on the outer wall of steel pipe, and its inwall does not have anti-corrosion function.

Summary of the invention:

The purpose of this utility model provides in a kind of pipe has corrosion-proof lining, pipe is outer to have the steel corrosion-proof lining directly buried type of heat insulation function heat preservation pipe prefabricated, the utility model is realized by following scheme: a kind of steel corrosion-proof lining directly buried type is heat preservation pipe prefabricated, it is the composite pipe that there are flange mouth or screw thread in two ends, its innermost layer is corrosion-proof lining (1), the centre is steel pipe layer (2), and the outside is thermal insulation layer (3), and thermal insulation layer has shell (4) outward;

Corrosion-proof lining (1) is a plastic tube;

Corrosion-proof lining (1) is a polyurethane tube;

Corrosion-proof lining is a stoneware pipe;

Thermal insulation layer is the polyurethane foam layer, and there is shell (4) its outside;

Thermal insulation layer is the silicates thermal insulating material;

The utility model compared with prior art has following characteristics: (1) can satisfy the conveying of multiple medium, comprises various Korrosionsmediums; (2) use inside lining anti-corrosive, compare its working life with coating and improve greatly, cost of production decreases; (3) easy construction, expense reduces, and is when possessing thermal insulation property, corrosion-resistant; (4) adopt direct-buried mode, utilization of area rate height is little to the influence of environment.

Description of drawings:

Fig. 1 is that the utility model is the external structure sketch of connection mouth with the flange;

Fig. 2 is that the utility model is the structural representation of connection mouth with the screw thread;

Fig. 3 is the utility model schematic cross-section.

Embodiment:

Embodiment 1: as Fig. 1, shown in Figure 3, the utility model adopts the flange-type connection mouth in this example, from its cross section four-layer structure is arranged, and the innermost layer is a plastic tube 1, and the centre is a steel pipe 2, and skin is poly-propylhomoserin insulating foam layer 3, and outermost surface is a metallic case.

Embodiment 2: as Fig. 2, shown in Figure 3, the utility model adopts the screwed connection mouth in this example, and its cross section also has four layers, and wherein internal layer is that polyurethane tube 1, centre are steel pipes 2, and outer again is silicates thermal insulating material 3, and outermost surface is a plastic shell 4.

Claims

1. a steel corrosion-proof lining directly buried type is heat preservation pipe prefabricated, is the composite pipe that there are flange mouth or screw thread in two ends, it is characterized in that its innermost layer is corrosion-proof lining (1), and the centre is steel pipe layer (2), and the outside is thermal insulation layer (3), and thermal insulation layer has shell (4) outward.

2. steel corrosion-proof lining directly buried type according to claim 1 is heat preservation pipe prefabricated, it is characterized in that above-mentioned corrosion-proof lining (1) is a plastic tube.

3. steel corrosion-proof lining directly buried type according to claim 1 is heat preservation pipe prefabricated, it is characterized in that above-mentioned corrosion-proof lining (1) is a polyurethane tube.

4. steel corrosion-proof lining directly buried type according to claim 1 is heat preservation pipe prefabricated, it is characterized in that above-mentioned corrosion-proof lining is a stoneware pipe.

5. steel corrosion-proof lining directly buried type according to claim 1 is heat preservation pipe prefabricated, it is characterized in that above-mentioned thermal insulation layer is poly-propylhomoserin foaming layer, and there is shell (4) its outside.

6. steel corrosion-proof lining according to claim 1 advances buried heat preservation pipe prefabricated, it is characterized in that above-mentioned thermal insulation layer is the silicates thermal insulating material.