CN201028166Y

CN201028166Y - Plastic composite pipe with helical metal strip

Info

Publication number: CN201028166Y
Application number: CNU2007201486188U
Authority: CN
Inventors: 叶建伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-30
Filing date: 2007-04-30
Publication date: 2008-02-27
Anticipated expiration: 2017-04-30

Abstract

The utility model discloses a plastic composite pipe with spiral metal belt and is designed to solve the problem that layers of the prior aluminum plastic composite pipe strip off. The plastic composite pipe with spiral metal belt comprises a pipe-shaped plastic layer which is provided with a metal layer inside, the metal layer is a spiral metal belt and the plastic layer forms a whole structure via the connection between two neighboring metal belts. The structure of the utility model is designed as the expansion or contraction volume produced when the metal lay is heated or becomes cool, is accommodated by the plastic between neighboring spiral metal belts and the plastic layer is capable of expanding or contracting corresponding to the metal belts and keeps accommodating the metal belts inside, overcoming the problem of the prior aluminum plastic composite pipe strip off. The utility model can be applied to water supply in industry and civil building works and pipeline system in floor heating and solar energy.

Description

The plastic composite pipe of band spiral metal band

Technical field

The utility model relates to a kind of composite pipe, especially a kind of plastic composite pipe with the spiral metal band.

Background technique

Since on June 1st, 2006, country has forbidden using Coating Steel Pipe in feedwater piping, plastic tube is developed rapidly and is used, wherein PP-R manages, be trackless Co-polypropylene tubing, become the best water-feeding pipes that substitutes Coating Steel Pipe, secondly also has PE-RT pipe (heat-resisting polyethylene tube), PE pipe (polyethylene pipe) and PB pipe tubing such as (Polybutylene Pipes), the distinct advantages of this class tubing is to have melting characteristic, the tubing that same material is made is with after pipe fitting 3 hot melts are connected, can form stable permanent seal, and install very easy.But, this class tubing is made by the unitary plastic material, in use there are some defectives, wherein greatest problem is that the linear expansion coefficient of plastics is big, and withstand voltage resistance to heat is relatively poor, especially the PP-R pipe, cold short poor performance, using below one 10 ℃, tubing embrittlement often appears, seriously restricted applying at cold areas in winter such as the north.

Simultaneously, the Strength of Metallic Materials height have many superior functions, and the plastic materials light weight is inexpensive, and therefore function admirable in conjunction with the advantage of metal and plastics, forms the trend that metal and plastic composite tubing become the tubing development.

In existing metal and the plastic composite pipe, aluminium-plastic composite pipe technology maturation and extensive use, aluminium-plastic composite pipe is outer plastic layer, aluminum metal layer and inner plastic layer are bonded to one successively and constitute, between the outer plastic layer, interior outer plastic layer was isolated fully and is not connected by aluminum metal layer in aluminum metal layer was clipped in; The problem that this aluminium-plastic composite pipe exists is, because the linear expansion coefficient of aluminum metal and plastics differs greatly, when whole composite pipe expands with heat and contract with cold, aluminum metal layer and plastic layer can produce bigger relative displacement between its interface, peel off each other between layer and the layer, can not realize the effectively compound of metal and plastics; The state of peeling off between this aluminium-plastic composite pipe interior layer and the layer generally is not the initial stage that occurs in, and after the problem of peeling off occurred, this state of peeling off be can't see from appearance, even also be difficult to remedy after special-purpose survey meter is found, caused very big hidden danger.

The model utility content

The utility model provides a kind of plastic composite pipe with the spiral metal band, and this plastic composite pipe has overcome the plastic layer that exists in the existing aluminium-plastic composite pipe and the problem of peeling off between the metal aluminium lamination.

In order to achieve the above object, the utility model provides a kind of plastic composite pipe with the spiral metal band, it comprises a tubular plastic layer, be provided with metal layer in the described tubular plastic layer, described metal layer is spiral metal tape, and plastic layer is connected to become overall structure by the gap between the spiral metal band phase adjacent band.

The utility model is arranged on tubular plastic layer inside with a helical metal band, and forming with the spiral metal band is skeleton, and based on the composite pipe of plastic layer, plastic layer is connected to become overall structure by the gap between the spiral metal band phase adjacent band; The overall construction design of the utility model plastic layer and the design of the helicoidal structure of metal layer, make metal layer when expanded by heating is caught a cold shortening, the swell increment or the shortening amount that produce are contained by the plastics between the helix structure phase adjacent band, plastic layer can be along with the expansion of metal tape or shortening and corresponding expansion or shortening, all the time metal tape is included in the plastic layer, thereby having overcome prior art whole metal layer produces when expanding with heat and contract with cold swell increment or shortening amount is accumulated in together, produce big relative displacement with plastic layer, and problem occurs peeling off layer by layer.

Description of drawings

Fig. 1 is the utility model embodiment 1 a sectional view;

Fig. 2 is the utility model embodiment 2 a sectional view;

Fig. 3 is the structural representation of spiral metal band of the present utility model;

Fig. 4 is the utility model embodiment 1 a Placement schematic representation;

Fig. 5 is the utility model embodiment 2 a Placement schematic representation.

Embodiment

The utility model provides a kind of plastic composite pipe with the spiral metal band, and when having overcome existing aluminium-plastic composite pipe and expanding with heat and contract with cold, the problem of peeling off layer by layer that occurs between metal layer and the plastic layer is elaborated to the utility model below in conjunction with drawings and Examples.

Referring to Fig. 1, shown in Figure 2, the plastic composite pipe of the utility model band spiral metal band, comprise a tubular plastic layer 1, be provided with metal layer in the tubular plastic layer 1, described metal layer is a helical metal band 2, plastic layer 1 is connected to become overall structure by the gap between the spiral metal band 2 phase adjacent bands, and spiral metal band 2 is contained by plastic layer 1, plays skeleton function in whole composite pipe; Metal layer can be arranged in the arbitrary position of plastic layer 1, in the embodiment 1 that Fig. 1 provides, spiral metal band 2 is arranged in tubular plastic layer 1 near the internal surface place, metal tape 2 to the wall thickness of plastic layer 1 outer surface and the thickness sum of metal tape 2 accounts for 2/3～5/6 of whole composite pipe wall thickness in this structure, and in the embodiment 2 that Fig. 2 provides, spiral metal band 2 is arranged in plastic layer 1 near outer surface, and metal tape 2 to the wall thickness of plastic layer 1 internal surface and the thickness sum of metal tape 2 accounts for 2/3～5/6 of whole composite pipe wall thickness in this structure.

Referring to shown in Figure 3, according to composite pipe intensity and flexible different requirements, the bandwidth of spiral metal band 2 is 1/4～2/3 of tubular plastic layer 1 caliber size, the gap between spiral metal band 2 every phase adjacent bands be metal tape 2 wide 1/10～1; According to the different requirements of composite pipe external diameter specification, the thickness of spiral metal band 2 is 0.2mm～5mm; For avoiding spiral metal band 2 to influence working life of composite pipe because of corrosion, the material of spiral metal band 2 is aluminium strip, copper strips or Stainless Steel Band etc.; The structure of spiral metal band 2 can be the structures such as integrated tape of flat rubber belting, flat rubber belting with holes, monolateral or bilateral saw shape band, no interface; Plastic layer 1 material of the utility model composite pipe is the plastic material that PP-R, PE-RT, PE or PB etc. have melting characteristic, and its caliber is 16～1200mm, and working pressure is 0.6～3.2Mpa.

Spiral metal band 2 of the present utility model is clipped in plastic layer 1 inside by embedding, and forming with spiral metal band 2 is skeleton, and based on the composite pipe of plastic layer 1, plastic layer 1 is connected to become overall structure by the gap between the spiral metal band 2 phase adjacent bands; The utility model is compared with existing aluminium-plastic composite pipe, and plastic layer 1 is by the inside and outside two-layer overall structure of changing into of being isolated by metal layer, and metal layer is changed into helicoidal structure by overall structure; The helicoidal structure design of the utility model metal layer, make metal layer when expanded by heating is caught a cold shortening, the swell increment or the shortening amount that produce are contained by the plastics between the helix structure phase adjacent band, plastic layer 1 can be along with the expansion of metal tape 2 or shortening and corresponding expansion or shortening, all the time metal tape 2 is included in the plastic layer 1, having overcome prior art whole metal layer produces when expanding with heat and contract with cold swell increment or shortening amount is accumulated in together, produce big relative displacement with plastic layer 1, and problem occurs peeling off layer by layer.

The plastic composite pipe of the utility model band spiral metal band adopts a co-extrusion injection moulding to form, its manufacturing process is as follows: at first, will have the raw material and the Masterbatch Hybrid Heating of melting behaviour, simultaneously with metal tape 2 outputs, through rotating core, metal tape 2 curls; Then, the plastic layer 1 synchronous co-extrusion of metal tape both sides; At last, typing cooling, typewriting, traction, cutting and finished product packing are stacked.

The utility model adopts hot melting and connecting method to be connected in use between composite pipe of the present utility model and the pipe fitting 3.Be arranged in the composite pipe at tubular plastic layer 1 close internal surface place for spiral metal band 2 as shown in fig. 1, adopt hot melting and connecting method to connect between composite pipe and the pipe fitting 3, as shown in Figure 4, with composite pipe outer surface and the heating of pipe fitting 3 internal surfaces, utilize common hot melt fastening means that the outer surface of composite pipe and the internal surface extruding of pipe fitting 3 have been connected one; Be arranged in plastic layer 1 near outer surface for as shown in Figure 2 spiral metal band 2, connecting means between composite pipe and the pipe fitting 3 is, at first use special tool to divest the outer surface and the spiral metal band 2 of plastic layer 1 end of composite pipe, the length that divests equals by the length of hot melt, as shown in Figure 5, adopt hot melting and connecting method to connect then.

The utlity model has higher-strength, heat-resisting withstand voltage, and have pliability, flexiblely do not rebound, reliable quality of connection is arranged again, be widely used in the cold and hot feedwater of industry and civil building engineering, in the pipe-line systems such as floor heating and solar energy.

The above is an exemplary embodiments of the present utility model, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. plastic composite pipe with the spiral metal band, comprise a tubular plastic layer, be provided with metal layer in the described tubular plastic layer, it is characterized in that: described metal layer is spiral metal tape, and plastic layer is connected to become overall structure by the gap between the spiral metal band phase adjacent band.

2. the plastic composite pipe of band spiral metal band according to claim 1 is characterized in that: the bandwidth of described spiral metal band is 1/4～2/3 of a tubular plastic layer caliber size, and the thickness of spiral metal band is 0.2mm～5mm.

3. the plastic composite pipe of band spiral metal band according to claim 2 is characterized in that: the gap between the every phase of the described spiral metal band adjacent band is 1/10～1 of a metal bandwidth.

4. the plastic composite pipe of band spiral metal band according to claim 3 is characterized in that: described spiral metal band structure is the structures such as integrated tape of flat rubber belting, flat rubber belting with holes, monolateral or bilateral saw shape band, no interface; The material of spiral metal band is aluminium strip, copper strips or Stainless Steel Band etc.

5. the plastic composite pipe of band spiral metal band according to claim 4 is characterized in that: the material of described plastic layer is the plastic material that PP-R, PE-RT, PE or PB etc. have melting characteristic, and its caliber is 16～1200mm.

6. according to the plastic composite pipe of the described band spiral metal of arbitrary claim band in the claim 1 to 5, it is characterized in that: described spiral metal band is arranged in the tubular plastic layer near the internal surface place, and metal tape to the wall thickness of plastic layer outer surface and the thickness sum of metal tape accounts for 2/3～5/6 of whole composite pipe wall thickness.

7. according to the plastic composite pipe of the described band spiral metal of the arbitrary claim of claim 1 to 5 band, it is characterized in that: described spiral metal band is arranged in plastic layer near outer surface, and metal tape to the wall thickness of plastic layer internal surface and the thickness sum of metal tape accounts for 2/3～5/6 of whole composite pipe wall thickness.