CN202442016U

CN202442016U - Novel plastic-coated steel tube

Info

Publication number: CN202442016U
Application number: CN2012200501105U
Authority: CN
Inventors: 王振峰
Original assignee: SHANDONG YIBAITONG MACHINERY CO Ltd
Current assignee: Shandong yibaitong Piping System Co. Ltd.
Priority date: 2012-02-16
Filing date: 2012-02-16
Publication date: 2012-09-19
Anticipated expiration: 2022-02-16

Abstract

The utility model discloses a novel plastic-coated steel tube, comprising a steel tube body, wherein a spiral inner groove is arranged on the inner wall of the steel tube body; a plastic-coated layer is arranged on the inner wall of the steel tube body; a spiral outer groove is arranged on the outer wall of the steel tube body; and the plastic-coated layer is arranged on the outer wall of the steel tube body as well. The novel plastic-coated steel tube is simple in structure and firm in the binding of the plastic-coated layer and the steel tube body, effectively avoids a phenomenon of telescopic peeling of the plastic-coated layer generated due to stress concentration, and has a great use effect.

Description

New-type plastic-coated steel

Technical field

The utility model relates to the pipe technology field, relates in particular to a kind of new-type plastic-coated steel.

Background technique

Plastic-coated steel is through on the steel pipe inwall, playing a kind of pipeline of protecting the steel pipe inwall with plastic spraying hot melt one deck plastic layer, generally before plastic-coated, need handling the inwall of steel pipe, like operations such as ball blast, rust cleaning; Make the inwall of steel pipe bright and clean as far as possible, increase the soundness that combines of coating layer and steel pipe inwall, but the phenomenon that coating layer breaks often appears in plastic-coated steel when normal use; This is that under the identical temperature difference, the thermal volume expansion of coating layer will be far longer than the thermal volume expansion of steel pipe itself because the thermal expansion coefficient gap of steel pipe and coating layer causes too greatly; So under the bigger situation of difference variation; Coating layer very easily produces stretchability and peels off, and separates with steel pipe when serious to come off, and loses the protective action of coating layer; For the less plastic-coated steel of caliber; The staff can't get into pipe interior and keep in repair, and can only change pipeline, thereby has increased the maintenance cost of equipment.

The model utility content

The utility model technical problem to be solved is: a kind of new-type plastic-coated steel is provided, and what the inwall of the coating layer of this plastic-coated steel and steel pipe body can be firm combines.

For solving the problems of the technologies described above, the technological scheme of the utility model is: new-type plastic-coated steel, comprise the steel pipe body, and have spiral helicine inner groovy on the inwall of said steel pipe body, the inwall of said steel pipe body is provided with coating layer.

As a preferred implementation, have spiral helicine outer groove on the outer wall of said steel pipe body, said outer groove and said inner groovy are provided with at interval, and the outer wall of said steel pipe body is provided with coating layer.

After having adopted technique scheme; The beneficial effect of the utility model is: owing on the inwall of steel pipe body, offered spiral helicine inner groovy; Simultaneously on the inwall of steel pipe body, be provided with coating layer, then coating layer can embed in the spiral helicine inner groovy, makes approaching smooth contact of steel pipe body and coating layer; Improved the combine soundness of steel pipe body with coating layer; When coating layer received stress, stress can disperse at groove, thereby had avoided the coating layer stress to concentrate and produce stretchability and peel off.

Owing on the outer wall of steel pipe body, also offered spiral helicine outer groove, and outer groove and inner groovy be provided with at interval, is provided with coating layer on the outer wall of while steel pipe body; The mechanical strength that not only guarantees the steel pipe body is unaffected; Make the internal and external environment symmetry of steel pipe body simultaneously, when the temperature difference changed, the inner coating layer of steel pipe body can keep identical state of changing with outside coating layer; Guarantee that the steel pipe body is stressed evenly, prolong its working life.

Description of drawings

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

Accompanying drawing is the utility model embodiment's a cross-sectional schematic;

Among the figure: 1. coating layer; 2. steel pipe body; 3. outer groove; 4. inner groovy.

Embodiment

Shown in accompanying drawing; Cross-sectional schematic for new-type plastic-coated steel; This new-type plastic-coated steel comprises steel pipe body 2, on the inwall of said steel pipe body 2, has spiral helicine inner groovy 4, on the outer wall of said steel pipe body 2, have spiral helicine outside groove 3; Unaffected for the mechanical strength that guarantees said steel pipe body 2, said inner groovy 4 is provided with outer groove 3 at interval.

On the inside and outside wall of said steel pipe body 2, be equipped with coating layer 1, coating layer 1 described herein can be selected PE (polyethylene) layer or PO (propylene oxide) layer for use, certainly; When said steel pipe body 2 is carried out plastic-coated, still need it is carried out operations such as ball blast, rust cleaning in advance, when accomplishing plastic-coated work on the inside and outside wall at said steel pipe body 2; Said coating layer 1 just can be embedded in said inner groovy 4 and the outer groove 3; Thereby not only make said steel pipe body 2 and coating layer 1 approaching smooth the contact, and strengthened the area of contact between said steel pipe body 2 and the coating layer 1 effectively, improved both combination soundnesses; When bigger difference variation takes place in the residing environment of plastic-coated steel; The stress that said coating layer 1 receives can obtain disperseing with outer groove 3 places at said inner groovy 4, avoid said coating layer 1 stress to concentrate and produce stretchability and peel off, and the environment facies of the inside and outside wall of said steel pipe body 2 together; Can guarantee that the steel pipe body is stressed evenly, prolong its working life.

The utility model is not limited to above-mentioned embodiment, and all are based on the technical conceive of the utility model, and the structural improvement of having done all falls among the protection domain of the utility model.

Claims

1. new-type plastic-coated steel comprises the steel pipe body, it is characterized in that: have spiral helicine inner groovy on the inwall of said steel pipe body, the inwall of said steel pipe body is provided with coating layer.

2. new-type plastic-coated steel as claimed in claim 1 is characterized in that: have spiral helicine outer groove on the outer wall of said steel pipe body, said outer groove and said inner groovy are provided with at interval, and the outer wall of said steel pipe body is provided with coating layer.

3. according to claim 1 or claim 2 new-type plastic-coated steel, it is characterized in that: said coating layer is PE layer or PO layer.