CN2593008Y

CN2593008Y - Anti-sunshine metal-plastic pipe

Info

Publication number: CN2593008Y
Application number: CN 02248551
Authority: CN
Inventors: 张世斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-08
Filing date: 2002-10-08
Publication date: 2003-12-17
Anticipated expiration: 2012-10-08

Abstract

The utility model relates to a construction pipe and pipe fittings, particularly an anti-sunshine metal-plastic pipe for construction water supply and sewage. The utility model is at least provided with an inner layer structure and an outer layer structure. The utility model is characterized in that the inner layer structure is of a plastic pipe with the large thickness, the outer layer structure is of a metal thin pipe, the plastic pipe is a PVC-U type plastic pipe, and the metal thin pipe is a stainless steel thin pipe or an aluminum alloy thin pipe. Outer layer metal of the anti-sunshine metal-plastic pipe provided by the utility model can protect inner layer plastics from direct irradiation of the sunshine, so the utility model has the advantages that the service life of the plastic pipe is prolonged, the intensity of the pipes is enhanced, and the cost of replacement of the water supply and sewage pipes in buildings is reduced.

Description

The sun-proof plastic tube of metal

Technical field

The utility model relates to the building pipe fitting, is specifically related to a kind of building water supply and sewage sun-proof plastic tube of metal.

Background technique

The water supply and sewage pipe that often uses on the construction market mainly contains overall plastic pipe and composite metal-plastic pipe at present, and all there are pluses and minuses separately in these two kinds of tubing.Overall plastic pipe such as PVC-U plastic tube, because PVC-U belongs to the polarity plastics, it is good to have physical property, the characteristics that available adhesive is bonding, but outdoor as if it is installed in, facts have proved, use 5-6 after the year, the be full of cracks that will become fragile of PVC-U plastic tube, working life is very limited.For the overall plastic pipe of PP-R, PE-X, its physical property is similar to the PVC-U pipe, consistently abroad aspect drinking water pipeline and edible packing think more satisfactory plastics brand, but because PP-R and PE-X belong to non-polar plastic, up to the present, also there is not the binder of normal temperature cure in order to bonding PP and two kinds of materials of PE.Connecting means commonly used is that electric heating welds method, and installation is cumbersome, and the price of pipe fitting than the expensive 5-6 of overall plastic PVC-U pipe fitting doubly when being installed in outdoor application, also exists and the same problem of aging of PVC-U pipe.

For composite metal-plastic pipe, be example with bore D15～20mm specification, for plastic stainless-steel composite-tubes, the thick 0.8～1.0mm of outer stainless steel, the thick 1.2～1.5mm of inner plastic; For aluminum alloy composite pipe, the thick 1.0～1.2mm of outer aluminum alloy, the thick 1.2～1.5mm of inner plastic.The physical property of these two kinds of composite pipes is also relatively good, but the deficiency that exists is: tubing price height, the pipe fitting price is also more expensive than the pipe fitting price of PP-X, install and use half a year after, the seepage situation can appear in jointing.Jointing main cause of seepage occurs and is that the thickness ratio of materials is unreasonable, the intensity of inner tube layer plastics is low, plasticity is high, and intensity height, the plasticity of outer tube layer metal are low, install to connect to be confined to bundle pressure principle, and reach firm requirement has just increased difficulty.For the zinc-plated composite metal-plastic pipe of skin, though its outward appearance is not good enough, its intensity height, interface is solid and reliable non-leakage, and inner plastic has solved the corrosion shortcoming of metal tube, is applicable to ground and exterior wall.

The model utility content

The technical problems to be solved in the utility model is, provides a kind of new metal sun-proof plastic tube, can improve the shortcoming of above-mentioned various pipes, prolongs the working life of pipeline.

Technical problem of the present utility model is to solve like this, provides the better novel metal of a kind of combination property sun-proof plastic tube, has double layer construction at least, it is characterized in that described endothecium structure is the bigger hard plastic tube of thickness, and described layer structure is the metal light wall pipe.

Implement the sun-proof plastic tube of metal that the utility model provides, outer field metal can protect the plastics of internal layer not to be subjected to the direct irradiation of sunlight, has prolonged the service life of plastic tube, strengthens the intensity of pipe, reduces the replace tubes expense of building for, drainage pipe.

Description of drawings

Fig. 1 is the plan view of the sun-proof plastic tube of the utility model metal;

Fig. 2 is the stereogram of the sun-proof plastic tube of the utility model metal;

Fig. 3 is the working process schematic representation of the sun-proof plastic tube of the utility model metal.

Embodiment

First embodiment of the sun-proof plastic tube of the utility model metal as Figure 1-3, with the finished product external diameter is that the PVC-U plastic tube (1) of 20mm, thickness 2.5～3.0mm is inserted in the stainless steel or Al-alloy pipe (2) that internal diameter is 20.5mm, thickness 0.25～0.35mm, through advancing pressing wheel device (3) pipe is sent into the reducing die cavity, after the external diameter of metal tube (2) dwindles through necking die (4), just tightly tie plastic tube (1), and then, just formed the sun-proof plastic tube of metal of the present utility model through more directly device (5) is more straight.This method has increased by 40% cost of material than the overall plastic pipe of original making, but can make prolong 6～7 times the working life of pipe.

Second embodiment of the sun-proof plastic tube of the utility model metal has adopted a kind of three-layer plastic tubular construction.According to the external strict drinking water pipeline and the sanitary standard of food package, the brand of common plastics is PP and PE.These two kinds of plastics belong to non-polar plastic, during connection, can't bond with the pipeline tackiness agent.Install in order to stick with glue the mixture bonding, can adopt and extrude compound die and make the three-layer plastic pipe, as: skin is the PVC-U polarity plastics of thick 2.0～2.3mm, middle cross-linked layer is that thickness is EVA or the EEA plastics of 0.1～0.2mm, and internal layer then is that thickness is PP or the PE non-polar plastic of 0.5～0.6mm.The plastic tube of three-decker like this, its outer field PVC-U polarity plastics can make to stick with glue and connect the agent bonding, and the sanitary standard of the PP of internal layer or PE non-polar plastic is good.If add the light wall pipe of metal stainless steel or aluminum alloy in such plastic tube outside, so just made and to have sticked with glue PP or the sun-proof plastic tube of PE metal that connects the agent bonding.The sun-proof plastic tube of this metal has increased by 60% than the fabricating cost of original overall plastic PP-R or PE-X pipe, but has prolonged 6～7 times working life.

In like manner, the making of the sun-proof plastic pipe of metal is similar to the making of the sun-proof plastic tube of metal.With the stainless steel thin layer of 0.25～0.3mm or the aluminum alloy thin layer of 0.3～0.4mm, after being pressed into U-shaped according to the shape of plastic pipe and specification, the finished product plastic pipe that scribbles tackiness agent is put into the U-shaped metalwork, again the U-shaped metalwork is pressed into the shape of O shape, sheet metal is coated on the outside of plastic pipe, through the HEMMING MACHINE crimping, just made the accessory of the sun-proof plastic tube of metal again.The sun-proof plastic pipe of this metal has increased by 75% than the fabricating cost of original all-plastic pipe fitting, but has prolonged 6～7 times of working lifes.

When the sun-proof plastic tube of the utility model metal is installed, need hand excising forceps with special use.Pipe is inserted a part of metal outer pipe of that end of pipe fitting and draw disconnected tearing,, inject then in the pipe fitting in access place coated with adhesive, can be bonding firm, its installation method is identical with the installation method of all-plastic PVC-U pipe.

Use the sun-proof plastic tube of metal of the present utility model, outer layer metal can protect plastics can not be subjected to the direct irradiation of the sun, has prolonged the working life of plastics, also can strengthen the structural strength of pipe simultaneously.No matter the sun-proof plastic tube of the utility model metal is mounted in outdoorly or indoor, and can reach 50～60 years its service life.

Claims

1, the sun-proof plastic tube of a kind of metal has inside and outside double layer construction at least, it is characterized in that, described endothecium structure is the bigger plastic tube of thickness, and described layer structure is the metal light wall pipe.

2, the sun-proof plastic tube of metal according to claim 1 is characterized in that, described plastic tube is the PVC-U plastic tube.

3, the sun-proof plastic tube of metal according to claim 1 is characterized in that, described plastic tube is made by three-layer plastic, and internal layer is a non-polar plastic, and the mesosphere is the cross-linked layer plastics, and skin is the polarity plastics.

4, the sun-proof plastic tube of metal according to claim 1 is characterized in that, described metal light wall pipe is stainless steel light wall pipe or aluminum alloy light wall pipe.

5, the sun-proof plastic tube of metal according to claim 1 is characterized in that, the inner plastic of described plastic pipe is PVC-U or other polarity plastics, and is outer for approaching stainless steel or thin aluminium alloy plate, pipe.