CN2656773Y

CN2656773Y - Steel-plastic composite pipe

Info

Publication number: CN2656773Y
Application number: CN 200320109322
Authority: CN
Inventors: 林安良
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-29
Filing date: 2003-10-29
Publication date: 2004-11-17
Anticipated expiration: 2013-10-29

Abstract

The utility model which relates to a composite pipe, in particular to a steel-plastic composite pipe solves the defect problems that the present composite pipes have complicated manufacturing technology, higher cost, non-ideal composite strength and no external anticorrosion. The steel-plastic composite pipe comprises a plastic pipe, a steel pipe, a layer of expaned adhesive which is injected and filled between the plastic pipe and the steel pipe, and an anticorrosion coating which is cladded outside the steel pipe, wherein, the expaned adhesive is polyurethane based on polyether combination; the anticorrosion coating is polyvinyl chloride which is a polyethylene thermal-shrinkage film; the utility model is mainly used in the high pressure transportation pipelines.

Description

Steel-plastic composite pipe

Technical field: the utility model relates to a kind of composite pipe, particularly a kind of steel-plastic composite pipe.

Background technique: the pressure-bearing of plastic tube is lower, can not applying high voltage conveyance conduit engineering field, as growing apart from transfer oil tubing, its long-term working pressure is at 2～6Mpa, obviously, pure-plastics pipe can not reach this high-pressure delivery and require, in order to improve the plastic tube working pressure, plastics strengthen composite pipe at present has the fiber of employing to twine enhancing, the compound enhancing of glass fibre reinforced plastics, steel wire twines and strengthens, metallic skeleton reinforced composite plastic pipe and steel pipe inwall are worn methods such as serving as a contrast plastic tube to satisfy the requirement that high-pressure delivery is used, the friction factor that can give full play to the plastic tube inwall like this is low, flow resistance is little, corrosion-resistant, non-scaling, advantages such as adhesion are specially adapted to the application of length apart from the high-pressure delivery engineering.At present, both at home and abroad to researching and developing the compound plastic pipe of high pressure resistant conveying, become the active demand of branchs of industry such as oil, mining industry.But the manufacturing process complexity of above composite pipe, cost is also higher, and combined strength bination is undesirable, manages outer corrosion-resistant problem and does not solve.

Summary of the invention: this patent technical issues that need to address are: increase the bond strength between plastic tube and steel pipe composite bed, solve the outer anticorrosion problem of pipe, reduce cost.

The technical solution of the utility model is: steel-plastic composite pipe, comprise plastic tube and steel pipe, and between plastic tube and steel pipe, be filled with one deck expansion Bond, be coated with anticorrosive coat at steel pipe.The expansion Bond is the polyurethane combined polyether, and anticorrosive coat is a kind of in PVC, the polyethylene kind heat-shrinkable film.Plastic tube adopts PVC (PVC), the polyethylene (polyethylene that comprises low density, linea low density, middle density, HMW, super high molecular weight, its code name is: LDPE, LLDPE, MDPE, HDPE, HMWPE, UHMWPE), ABS, nylon (comprising PA6, PA66, PA1010), polypropylene (comprise homopolymerization level, copolymerization level, random copolymerization level, its code name is PP-H, PP-B, PP-R) and the various plastic tube that carries out modification with above-mentioned resin.Steel pipe adopts a kind of in welded steel pipe, seamless steel pipe, cast iron tube, the Stainless Steel Tube, also can be copper pipe, aluminum pipe, and other metal alloy pipe.

The utility model compared with prior art has following advantage: 1, the art of this patent strengthens as metal frame with the steel pipe of relevant patent report or the steel pipe inwall is worn lining plastic tube structure and manufacturing technology process is completely different, the former is the extruding and moulding autofrettage for one-process, the art of this patent is the manufacture method of two step method, promptly adopt two kinds of tubing of integral plastics pipe and steel pipe with the compound autofrettage of expansion tackiness agent filling, the art of this patent is simplified the complexity of composite plastic pipe manufacturing mechanism and operating procedure greatly, controlled mass stability height, cost up-to-standard rate height; 2, it is fast that the plastic steel composite pipe of patented technology manufacturing can adopt rapid pipe joint site operation connection speed, installing engineering efficient height; 3, good price performance, it is low that tubing is extruded cost, manufacturing efficient height, use working pressure can adopt the pipe thickness of corresponding steel pipe to the size design of the working pressure value of tubing use according to the user, it is low to have manufacturing expense, practical, can avoid the wasting phenomena of " low load with strong power "; Patent adopts between a kind of composite bed of expand Bond filling plastic tube and steel pipe, the powerful expansive force that utilizes the expansion Bond to produce in solidification process reaches nonvolatil between fastening plastic tube and the steel pipe and engages and manage the outer anticorrosion cladding of heat-shrinkage material of adopting.

Description of drawings:

Accompanying drawing is the utility model structural representation

Among the figure: 1-plastic tube, 2-expansion Bond, 3-steel pipe, 4-anticorrosive coat.

Embodiment: embodiment 1: steel-plastic composite pipe, comprise plastic tube 1 and steel pipe 3, and between plastic tube 1 and steel pipe 3, annotate and be filled with one deck expansion Bond 2, be coated with anticorrosion 4 layers at steel pipe 3.Expansion Bond 3 is the polyurethane combined polyether, and the trade mark is JMY-2, is the conventional raw material of market purchasing, and anticorrosive coat is PVC or polyethylene kind heat-shrinkable film.Plastic tube is a ultra-high molecular weight polyethylene, and steel pipe adopts seamless steel pipe.Implementing process is a filled with polyurethane foam combined polyether between superhigh molecular weight polyethylene pipe and seamless steel pipe, the powerful expansive force that utilizes the expansion Bond in solidification process, to produce, reach the permanent bond between fastening plastic tube and the steel pipe, coat at steel pipe external application thermal shrinked thin-membrane with polyvinyl chloride.

Embodiment 2: plastic tube adopts the ABS pipe, and steel pipe adopts Stainless Steel Tube, and anticorrosive coat is the polyethylene kind heat-shrinkable film, and expansion Bond 3 is the polyurethane combined polyether, and the trade mark is JMY-3, and all the other are identical with embodiment 1.

Embodiment 3: plastic tube adopts nylon tube, and steel pipe adopts welded steel pipe, and anticorrosive coat is the polyethylene kind heat-shrinkable film, and expansion Bond 3 is the polyurethane combined polyether, and the trade mark is JMY-4, and all the other are identical with embodiment 1.

Embodiment 4: plastic tube adopts polyethylene pipe, and steel pipe adopts copper pipe to substitute, and anticorrosive coat is the polyethylene kind heat-shrinkable film, and expansion Bond 3 is the polyurethane combined polyether, and the trade mark is JMY-5, and all the other are identical with embodiment 1.

Embodiment 5: plastic tube adopts polyvinyl chloride pipe, and steel pipe adopts cast iron tube to substitute, and anticorrosive coat is the polyethylene kind heat-shrinkable film, and expansion Bond 3 is the polyurethane combined polyether, and the trade mark is JMY-1, and all the other are identical with embodiment 1.

Embodiment 6: plastic tube adopts polypropylene tube, and steel pipe adopts seamless steel pipe to substitute, and anticorrosive coat is the polyethylene kind heat-shrinkable film, and expansion Bond 3 is the polyurethane combined polyether, and the trade mark is JMY-1, and all the other are identical with embodiment 1.

Claims

1, steel-plastic composite pipe comprises plastic tube and steel pipe, it is characterized in that being filled with one deck expansion Bond between plastic tube and steel pipe, is coated with anticorrosive coat at steel pipe.

2, steel-plastic composite pipe according to claim 1 is characterized in that, the expansion Bond is the polyurethane combined polyether.

3, steel-plastic composite pipe according to claim 1 is characterized in that, anticorrosive coat is a kind of in PVC, the polyethylene kind heat-shrinkable film.