CN201326838Y

CN201326838Y - Steel-plastic composite pipe

Info

Publication number: CN201326838Y
Application number: CNU2008202251875U
Authority: CN
Inventors: 付良华; 林宝树
Original assignee: Yantai Fangda Rotational Molding Co Ltd
Current assignee: Yantai Fangda Rotational Molding Co Ltd
Priority date: 2008-12-11
Filing date: 2008-12-11
Publication date: 2009-10-14
Anticipated expiration: 2018-12-11

Abstract

The utility model discloses a steel-plastic composite pipe, which pertains to the technical field of pipes. The steel-plastic composite pipe consists of a pipe wall coated with a polyethylene layer. The pipe wall is winded by a steel strip and is spiral, adjacent spirals are superposed with each other, an anti-running groove is arranged between the internal spirals and the external spirals, and a convex reinforced rib is fixed and spirally distributed on the outer surface of the pipe wall. The steel-plastic composite pipe has the characteristics of the spiral steel strip pipe wall, tight combination and no peeling between the pipe wall and the polyethylene layer, high strength, corrosion resistance, long service life and low cost.

Description

A kind of steel-plastic composite pipe

Technical field

The utility model belongs to the tubing technical field, especially relates to a kind of steel-plastic composite pipe.

Background technique:

The used tubing of current China's heavy caliber under ground piping is mainly made raw material with cast iron and steel and cement, and the common drawback of these pipelines is consumptive material height, and weight is big, constructional difficulties, and the life-span is short, easily pollutes easy to leak etc.; And the plastic tube of only a few is because of reasons such as its intensity and costs, still can not replace these non-plastic tubes, even also be multiple tubing and usefulness abroad, useful in recent years plastics are made the example that is applied to large diameter pipeline of the steel pipe success of liner, but because the poor adhesive force of plastic lining and steel pipe, thereby plastic inner lining takes place to be peeled off, cracking, seepage, cause the accident, the example that does not reach projected life is also a lot, the outer tube of this inner lining plastic tube still is heavy steel pipe in addition, high cost and outside aseptic technic difficult point have all limited promoting the use of of it to a certain extent, more than these problems are common difficulties that current domestic and international under ground piping faces.

Summary of the invention

The purpose of this utility model be to improve the deficiency of prior art and provide a kind of helical steel band do tube wall, tube wall combine with polyethylene layer closely do not peel off, intensity height, corrosion-resistant, long service life, steel-plastic composite pipe that cost is low.

The purpose of this utility model is achieved in that a kind of steel-plastic composite pipe, is made up of tube wall outer wrapping polyethylene layer, is characterized in that tube wall is that steel band is wound up as helical, and the superimposed position between adjacent spiral forms the anticreep groove.

In order further to realize the purpose of this utility model, can be the strength bar that is fixed with projection in the appearance of tube wall.

In order further to realize the purpose of this utility model, can be the outer surface of strength bar spiral distribution at tube wall.

Compared with the prior art the utility model has following distinguishing feature and good effect: the utility model adopts to be made up of tube wall outer wrapping polyethylene layer, tube wall is that steel band is wound up as helical, superimposed position between adjacent spiral forms the anticreep groove, be to adopt polyethylene layer inside and outside the tube wall, the high consumptive material and the low intensive problem of existing tubing have so just been solved with less steel and polyethylene, polyethylene layer is embedded in the middle of the anticreep groove in the rotational moulding process, eliminated the delamination of existing plastic inner lining steel pipe fully, wrap in the polyethylene layer fully because the band of steel strengthens the steel pipe of structure again, the erosion that has completely cut off external environmemt and inwall fluid, have corrosion-resistant, the characteristics that life-span is long, thicker rotational moulding polyethylene layer are suitable for the pipeline that requirement is carried severe corrosive and is mixed with abrasion thing such as silt particle; Appearance at tube wall is fixed with protruding strength bar, guarantees that tubing has enough strength and stiffness; The strength bar spiral distribution makes tubing have higher strength and stiffness at the outer surface of tube wall.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described in further detail.

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

Fig. 2 is a structural representation in another of the present utility model.

Embodiment

Embodiment 1, a kind of steel-plastic composite pipe, with reference to Fig. 1, be that tube wall 2 is that steel band is wound up as helical, form anticreep groove 3 between the superimposed position of adjacent spiral superimposed and internal spiral and external spiral, tube wall 2 rotational moulding on the rotational moulding machine becomes the polyethylene layer 1 of inwall, polyethylene layer 1 is embedded in the anticreep groove 3 in the rotational moulding process, tube wall 2 outsides are the polyethylene layers 1 that adopt workmanship of spraying plastics to form, and inside and outside polyethylene layer 1 becomes one, and this has constituted a kind of structure of the present utility model.

Embodiment 2, a kind of steel-plastic composite pipe, with reference to Fig. 2, be that tube wall 2 is that steel band is wound up as helical, form anticreep groove 3 between the superimposed position of adjacent spiral superimposed and internal spiral and external spiral, the appearance of tube wall 2 is welded with the strength bar 4 of projection, the cross section of strength bar 4 is trapezoidal, strength bar 4 spiral distribution are at the outer surface of tube wall 2, tube wall 2 rotational moulding on the rotational moulding machine becomes polyethylene layer 1 inwall, and polyethylene layer 1 is embedded in the rotational moulding process in the anticreep groove 3, and the outside of tube wall 2 and strength bar 4 is polyethylene layer 1 outer walls that adopt workmanship of spraying plastics to form, the inner and outer wall of polyethylene layer 1 becomes one, and this has constituted another kind of structure of the present utility model.

Claims

1, a kind of steel-plastic composite pipe is made up of tube wall (2) outer wrapping polyethylene layer (1), it is characterized in that tube wall (2) is that steel band is wound up as helical, and the superimposed position between adjacent spiral forms anticreep groove (3).

2, a kind of steel-plastic composite pipe according to claim 1 is characterized in that being fixed with protruding strength bar (4) in the appearance of tube wall (2).

3, a kind of steel-plastic composite pipe according to claim 2 is characterized in that the outer surface of strength bar (4) spiral distribution in tube wall (2).