CN201666417U

CN201666417U - Steel-plastic composite pipe

Info

Publication number: CN201666417U
Application number: CN2010201296804U
Authority: CN
Inventors: 徐志茹; 沈百方; 杨伟芳; 沈柏荣; 魏安家; 钱银华; 史根法
Original assignee: ZHEJIANG KINGLAND PIPELINE TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG KINGLAND PIPELINE TECHNOLOGY Co Ltd
Priority date: 2010-03-12
Filing date: 2010-03-12
Publication date: 2010-12-08
Anticipated expiration: 2020-03-12

Abstract

The utility model relates to a pipe fitting structure, in particular to a steel-plastic composite pipe which is realized through the following technical scheme: the steel-plastic composite pipe comprises a steel pipe and an inner plastic layer, the outer wall of the inner plastic layer is fixedly connected with the inner wall of the steel pipe, the steel pipe is provided with a pressing groove near the end position, and the steel-plastic composite pipe further comprises an expansion fastener sleeved with the inner plastic layer. The steel-plastic composite pipe has the function of preventing separation between the steel pipe and the inner plastic layer.

Description

A kind of steel-plastic composite pipe

Technical field

The utility model relates to fitting structure, particularly a kind of steel-plastic composite pipe.

Background technique

Steel-plastic composite pipe generally by steel pipe with fixedly connected with the steel pipe inwall in mould layer and constitute, and steel-plastic composite pipe has multiple different Placement, corresponding different Placements, the linkage structure of being located on the every steel-plastic composite pipe is also different; For the steel-plastic composite pipe that connects by anchor ear, it is provided with the indent that matches with anchor ear near the pipe end place.

Yet, above-mentioned indent forms by special channeling machine compacting, in the middle of pressing process, steel-plastic composite pipe pipe end place outer wall pressurized and concaving, and because the heat in the pressing process, moulding layer in the pipe end place can be softening, therefore, in the middle of pressing process the pipe end place in mould the layer separate easily with steel pipe, finally influence the quality of steel-plastic composite pipe, at the sealing effect extreme difference at its pipe end place, back that comes into operation, influence working life.

The model utility content

The purpose of this utility model provides a kind of steel-plastic composite pipe, moulds the phenomenon that layer separates with steel pipe in this kind steel-plastic composite pipe can be avoided taking place when being pressed indent.

Above-mentioned technical purpose of the present utility model is achieved by the following technical programs: a kind of steel-plastic composite pipe, mould layer in comprising that steel pipe and outer wall fixedly connected with the steel pipe inwall, described steel pipe is provided with indent near the pipe end place, this kind steel-plastic composite pipe also comprise with in mould the expansion fastener of layer socket.

As of the present utility model preferred, described expansion fastener is straight tube-like and closes with the interior laminating of moulding.

As of the present utility model preferred, described expansion fastener is T-shaped and be made up of straight length and circle face; The straight length outer wall with in mould laminating and close; Circle face and steel pipe one end face are fitted.

As of the present utility model further preferred, the material of described expansion fastener is a stainless steel.

As of the present utility model further preferred, described expansion fastener surface-coated has plastic layer.

The coating of plastic layer make expansion fastener can with interior mould the layer and the steel pipe end face fit more closely.

In sum, the utlity model has following beneficial effect:

1, suppress on this kind steel-plastic composite pipe in the indent with channeling machine, expansion fastener does not separate with the interior layer of moulding by the steel pipe of the mechanical strength protection pipe end of self, has overcome disadvantages of background technology;

2, since steel-plastic composite pipe in use, mould impurity such as easy water of infiltration or corrosion thing between layer and the steel pipe in its pipe end, therefore, the steel pipe at pipe end place with in mould the layer in use easily separated, and the setting that above-mentioned expansion fastener circle face and steel pipe one end face are fitted, effectively avoided the influence of impurity, improved working life this steel-plastic composite pipe pipe end.

Description of drawings

Fig. 1 is embodiment's 1 sectional view;

Fig. 2 is embodiment's 2 sectional views.

Among the figure, 1, steel pipe, 2, in mould layer, 3, expansion fastener, 11, indent, 31, straight length, 32, the circle face.

Embodiment

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

This specific embodiment only is to explanation of the present utility model; it is not to restriction of the present utility model; those skilled in the art can make the modification that does not have creative contribution to present embodiment as required after reading this specification, but as long as all are subjected to the protection of Patent Law in claim scope of the present utility model.

Embodiment 1: a kind of steel-plastic composite pipe, as shown in Figure 1, mould in comprising that steel pipe 1, outer wall fixedly connected with steel pipe 1 inwall layer 2 and with in mould the expansion fasteners 3 that layer 2 is fitted; Described steel pipe 1 is provided with indent 11 near the pipe end place, and described expansion fastener 3 is a straight tube-like and an end face and steel pipe 1 one end faces and is in same plane; Described expansion fastener 3 by special tube expander expand mould in back and this kind steel-plastic composite pipe layer 2 fit and compress in mould layer 2; When suppressing indent 11 with channeling machine on this kind steel-plastic composite pipe, expansion fastener 3 does not separate with the interior layer 2 of moulding by mechanical strength protection indent 11 places of self and the steel pipe 1 of periphery.

The material of expansion fastener 3 is a stainless steel material; For expansion fastener 3 can be fitted more closely with the interior layer 2 of moulding, but expansion fastener 3 surface coating plastic layers, and plastic layer is not shown in the drawings.

Because indent 11 is by channeling machine compacting, therefore, expansion fastener 3 protection steel pipe 1 with in mould 2 a unseparated while of layer, at indent 11 places to projecting inward.

Embodiment 2: a kind of steel-plastic composite pipe, as shown in Figure 2, mould in comprising that steel pipe 1, outer wall fixedly connected with steel pipe 1 inwall layer 2 and with in mould the expansion fastener 3 of layer 2 socket, described steel pipe 1 is provided with indent 11 near the pipe end place; Described expansion fastener 3 is T-shaped, the straight length 31 of expansion fastener 3 with in mould layer 2 and fit, the circle face 32 of expansion fastener 3 is fitted with the end face of steel pipe 1.Described expansion fastener 3 by special tube expander expand mould in back and this kind steel-plastic composite pipe layer 2 fit and compress in mould layer 2; When suppressing indent 11 with channeling machine on this kind steel-plastic composite pipe, expansion fastener 3 does not separate with the interior layer 2 of moulding by mechanical strength protection indent 11 places of self and the steel pipe 1 of periphery.

The material of expansion fastener 3 is a stainless steel; For expansion fastener 3 can be fitted more closely with the interior layer 2 of moulding, but expansion fastener 3 surface coating plastic layers, and plastic layer is not shown in the drawings.

Because indent 11 is by channeling machine compacting, therefore, expansion fastener 3 protection steel pipe 1 with in mould 2 a unseparated while of layer, its straight length 31 at indent 11 places to projecting inward.

The influence of impurity to this steel-plastic composite pipe pipe end effectively avoided in the setting of the circle face 32 of expansion fastener 3, improved working life.

Claims

1. steel-plastic composite pipe, mould layer (2) in comprising that steel pipe (1) and outer wall fixedly connected with steel pipe (1) inwall, described steel pipe (1) is provided with indent (11) near the pipe end place, it is characterized in that: this kind steel-plastic composite pipe also comprise with in mould the expansion fastener (3) of layer (2) socket.

2. a kind of steel-plastic composite pipe according to claim 1 is characterized in that: described expansion fastener (3) is straight tube-like and fits with the interior layer (2) of moulding.

3. a kind of steel-plastic composite pipe according to claim 1 is characterized in that: described expansion fastener (3) is T-shaped and be made up of straight length (31) and circle face (32); Straight length (31) outer wall with in mould layer (2) and fit; Circle face (32) is fitted with steel pipe (1) one end face.

4. according to claim 2 or 3 described a kind of steel-plastic composite pipes, it is characterized in that: the material of described expansion fastener (3) is a stainless steel.

5. a kind of steel-plastic composite pipe according to claim 4 is characterized in that: described expansion fastener (3) surface-coated has plastic layer.