Antishrinking hot-sleeving technology and equipment for composite steel-plasticpipe
A technology of steel-plastic composite pipe and anti-shrinkage, which is applied in the field of manufacturing steel-plastic composite pipe with two pipes set together, can solve the problems of incomplete composite of two pipes, large difference in expansion coefficient, poor product stability, etc. High efficiency and stable product effect
Inactive Publication Date: 2006-10-18
韩德清
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Problems solved by technology
This process also has the following disadvantages. One is that the equipment is more complicated and the cost is high; especially the expansion coefficients of the two materials of steel pipe and plastic pipe are greatly different (nearly twice), and after cooling, the composite of the two pipes is often incomplete, and the debonded part will follow. The storage time, the increase of the diameter of the pipe, and even the increase of factors such as vibration will increase the stability of the product.
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[0017] The technical solutions of the present invention will be further specifically described below through examples.
[0018] For method examples, see figure 1 . During production, it can be intermixed at room temperature to improve efficiency.
[0019] 1) Preparatory process: steel pipe length 6m, pipe diameter 2 inches; polypropylene PP plastic pipe length 6.5m, pipe wall thickness 1.5mm; the difference between the inner and outer diameters of the two pipes is 0.7-1mm. There is a thickened pipe wall 1-1 on one side of the plastic pipe, and the outer wall of the thickened part is pre-processed with a groove 1-2 with a depth of 0.6mm suitable for the inner joint of the steel pipe (see image 3 ). The front end of the plastic tube has a front end cap 4, and the back cover 5 seals the plastic tube. Cooling water is filled in the plastic tube, and holes on the cover 5 communicate with the air pressure source. There is an annular groove 4-1 between the front head 4 and the p...
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Abstract
The invention relates to a technology for manufacturing a steel-plastic composite pipe by nesting two pipes together, in particular to an anti-shrinkage thermal sleeve method and equipment. It is characterized in that: the inner diameter of the steel pipe - the outer diameter of the plastic pipe / the inner diameter of the steel pipe is not more than 1 / 30; the front and back of the plastic pipe are sealed, and the pipe is filled with cooling liquid; the room temperature plastic pipe (1) is inserted into the heated steel pipe through the rubber bucket (3) (2) Go to the other port, let the glue spread between the two tubes; get the product after cooling. The technology of the invention is reasonable, the product is stable, and the combination rate of the two tubes is high; the device structure of the invention is simple, and the combination efficiency is high.
Description
technical field [0001] The invention relates to a technology for manufacturing a steel-plastic composite pipe by nesting two pipes together, in particular to an anti-shrinkage thermal sleeve method and equipment. Background technique [0002] Chinese patent application 01126863.8 discloses a "manufacturing method of aluminum-plastic composite pipe", which puts the plastic inner pipe into the aluminum pipe, and makes the aluminum pipe and the pipe wall of the plastic inner pipe tightly bonded to form an aluminum pipe by drawing and clamping equipment. Plastic composite pipe. This method requires a set of drawing and clamping equipment, the manufacturing cost is high, and the drawing process cannot be applied to steel pipes. There is also a composite process, that is, the plastic pipe is glued and inserted into the steel pipe, and the plastic pipe is filled with pressure gas when the two pipes are heated together, so that the softened plastic pipe is compounded with the steel...
Claims
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IPC IPC(8): B29C63/34
Inventor 韩德清
Owner 韩德清