CN2084544U - Steel armoured insulation directly bury pipe - Google Patents

Abstract

The utility model relates to an improvement to the conveying pipeline of heating medium. A straight-embedded pipe of steel armor is made by the adhesion and pipe coiling of the thin-wall steel belt compacted into a wave shape. The thin-wall steel belt is served as an outer shell and foaming heat insulating material is filled after the outer shell and an inner pipe are fixed. The outer shell adopts the wave shape to increase the stiffness and the strength and also the friction force between the outer shell and the earthiness is increased to prevent the skeleton separation dehiscence of the outer shell in order to provide a new product of the straight-embedded pipe with good quality, low cost and high efficiency.

Description

Steel armoured insulation directly bury pipe

The utility model relates to a kind of conveyance conduit, particularly to the improvement of heating agent conveyance conduit.

The heating agent pipeline divides three kinds according to its paving mode at present, trench laying structure, overhead type construction, direct buried pipe.Floor space is big because ground groove structure, overhead type structure have, befouling environment, engineering cost height, waste energy and shortcoming such as amount of maintenance is big, so the directly buried type conveyance conduit is popularized and promoted.Direct buried pipe has two big classes in the world today: the one, originate from American-European polyester type direct buried pipe (being called for short yellow nail or melanonychia); The 2nd, glass fibre reinforced plastics casing insulation direct buried pipe.Its structure of yellow nail direct buried pipe is to make shell by interior pipe with the polyester type material, filling-foam thermal insulating material between interior pipe and the shell.The shortcoming of this direct buried pipe is to involve great expense, particularly make shell with plastics, the surface is very smooth, the pipeline that is in operation interior liquid or gas by heating, pressurization, the expansion coefficient difference of the different materials of direct buried pipe, frictional force between shell and the soil property occurs taking off the bone phenomenon less than the viscous force between outer casing inner wall and the thermal insulation layer easily, causes the direct buried pipe rhegma that rises bad.

The glass fibre reinforced plastics casing of 88021715.2 William's inventions is incubated direct buried pipe by retrieval, and its structure is to apply one deck separation layer at the metallic conduit shell, fills as thermal insulation layer between separation layer and glass fibre reinforced plastics casing with foam material.The shortcoming of glass fibre reinforced plastics casing insulation direct buried pipe is foaming back fw frp moulding earlier on the separation layer of interior pipe.Like this, interior pipe, thermal insulation layer, shell can not constitute the three-in-one, the gap appears in the reason owing to processing technology between them, so be in operation because the expansion coefficient difference of various materials, cause thermal insulation layer, shell, take off the osteodiastasis phenomenon, it is low to twine paste shell mechanization degree with glass fibre reinforced plastics in addition, and manufacturing efficiency is not high.

For the shortcoming the purpose of this utility model that overcomes original technology is with behind wave-like type outer tube and the interior pipe fixed position, fill with foaming thermal-insulating again, make interior pipe, the thermal insulation layer and the wave-like type outer tube three-in-one, thereby it is good to design a kind of quality, cost is low, but the steel first that mechanization is produced insulation direct buried pipe product.

The utility model is realized by following measure

A kind of insulation direct buried pipe, form by interior pipe, separation layer, thermal insulation layer and shell, it is characterized in that shell by the thin steel band of embossing through pipe crimping, the bonding thin-walled steel corrugated pipe of making; the outer wall anticorrosive coating of thin-walled steel corrugated pipe, the outer wall of interior pipe are that separation layer all can adopt glass fibre reinforced plastics or senior anticorrosive paint.

A kind of insulation direct buried pipe is made up of interior pipe, thermal insulation layer and shell, and feature of the present utility model is that shell is through the bonding thin-walled steel corrugated pipe of making of pipe crimping by the thin steel band that is pressed into wave-like type.

With thin-walled steel corrugated pipe and the interior pipe that has applied anti-corrosion material place on the thermal insulation layer filling machine fix the position with the interior pipe of putting well earlier after, vertically give stress with applying on the thin-walled steel corrugated pipe again, filling-foam thermal insulating material then, remove give stress after, make interior pipe, thermal insulation layer, the shell three-in-one.Because shell is to adopt the thin-walled steel corrugated pipe, promptly having increased rigidity makes again between shell and the soil property, increased frictional force between thermal insulation layer and the shell, after the moulding of steel first direct buried pipe, in order to increase the anti-corrosion property energy of Steel Thin-Wall wave tube outer surface, case surface can be applied anti-corrosion material, the steel band length of the thickness of thin-walled steel corrugated pipe and pipe crimping, width, thickness can be determined according to the diameter of pipe in the direct buried pipe.The thin-walled steel corrugated pipe is the steel band by cutting, according to the size of direct buried pipe diameter of inner pipe design wave, compression moulding on press machine, the steel band that will suppress wave again is rolled into tubulose on rolling machine, jointing is bonding with tackiness agent, determines by several bonding the forming of wave pipe according to the length of interior pipe again.

Advantage of the present utility model:

1, because the direct buried pipe shell is to adopt the thin-walled steel corrugated pipe, cause rigidity, the intensity of shell to increase, frictional force between shell and the soil property is more than or equal to the viscous force between thermal insulation layer and outer casing inner wall, thereby improved the quality of direct buried pipe greatly, prolonged working life.

2, steel first direct buried pipe cost is low, and ditch is buried 79.54 yuan/meter after testing, 74.86 yuan/meter of polyester types, and 64.2 yuan/meter of glass fibre reinforced plastics casing direct buried pipe, 53.7 yuan/meter of steel first insulation direct buried pipe greatly reduce cost.

3, owing to steel band roll-in, pipe crimping, fill insulant material all can adopt mechanization, has improved manufacturing efficiency greatly.

Accompanying drawings is as follows:

Accompanying drawing 1 steel first direct buried pipe generalized section

Fig. 2 thin-walled steel corrugated pipe external form figure

Fig. 3 is pressed into the steel band unfolded drawing of wave

With the interior pipe (1) that applies anti-corrosion material and Steel Thin-Wall wave pipe shell (2) behind fixed position on the equipment, filled with foaming material thermal insulation layer (3) applies anti-corrosion material (4) on the outer wall of the outer wall of shell and interior pipe, promptly make steel first insulation direct buried pipe as shown in the figure.

Claims (1)

1. A kind of insulation direct buried pipe is made of interior pipe, separation layer, thermal insulation layer, shell, it is characterized in that its shell is a thin-walled steel corrugated pipe of being made anticorrosive coat by the thin steel band that is pressed into wave-like type through pipe crimping, the bonding outer wall of making of glass fibre reinforced plastics or high grade paint.

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