SU220481A1 - Apparatus for continuous production of biplastic tubes - Google Patents

Description

Prospectively, the production of bi-paste pipes used in the chemical industry for the transportation of aggressive media with high pressure and temperature.

A known dp installation for producing bipastmass pipes made of polyethylene and glass plastic, containing the mechanism for moving the polyethylene pipe, the application of a glass impregnated binder to the polyethylene pipe, a plastering unit with a calibrating sleeve, a polymerization chamber, and a fitting and fitting unit.

In this case, the heated thermoplastic shell of the dolmsh when} ksh 1v spoy not impregnated binder fiberglass to the top of the gage sleeve, for which compressed air must be created inside the thermoplastic shell.

The chain of the invention is to provide a high-quality mechanical connection between the GRP and thermoplastic pipe shells.

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The proposed installation is based on a device that provides high-quality cladding with the surface of a polyethylene pipe not impregnated with a binder of glass fabric without using compressed air, which simplifies installation.

The proposed installation differs from that in which the cladding assembly consists of a crimping chamber with a cooling jacket, a heating chamber and a cooling chamber. The crimping chamber is divided in length into three sections with lengths of 0.5-0.7 d, 0.30, 35 and 15-20 mm, respectively, with the diameter of the middle section equal to O, 96d, where d.

FIG. 1 is a schematic of the installation in FIG. 2 given a longitudinal section of the node. cladding in figs. Figure 3 shows a cross section of a polyethylene pipe clad with glass cloth.

The installation consists of guide rollers 1, reels 2, glass-laying unit 3, cladding unit 4, having crimping chambers 5, cooling b and 7, fiberglass-forming unit 8, polymerisation chambers 9, lifting device 10 and cutting device 11.

A finished pipe 12 with a wall of 2.5 and supplied with a puller device 10 to the unit 3 of the stacking of the glass tape is lined with an un-impregnated bonding glass band 13 which fits tightly and has a joint of 1-0-12 mm.

The polyethylene pipe covered with glass tape 13 enters the cladding unit dp of crimping and cooling, while compressing within elastic deformations due to appropriately selected areas of the inner opening of the crimping chamber.

So, plot 14 has; length 0,5О, 70 and hole diameter 3. Section 15 has a cone from dia 1 1 d to diameter d. and a length of 0.3-0.35. Liametr plot 16 of | Oh, 96 {“and its length is 15-2 mm.

In the compressed, within the limits of elastic deformations, a popietipen pipe that passes through the heating chamber 6 with the diameter of the bore bore OP and the temperature of the walls of the chamber 550-600-t; softens, from heating, the surface layer 16 of the polyethylene pipe body. At the same time, the length of the heating chamber and the speed of movement of the polyethylene pipe must ensure that the heating of the thickness of the surface layer of the pipe is not greater than the thickness of the layer of glass tape.

The softened surface layer of the polyethylene pipe is forced by the elastic force of the pipe into the gap between its threads and the penetration between the filaments and into them,

In the cooling chamber with an inner diameter c1 and a length of 2.5-3 o | The softened layer of the polyethylene pipe hardens, and the clad pipe 17 enters the glass fiber forming unit 8, where the longitudinal and radial layers of the impregnated binder glass are laid on the required thickness. At the same time binder

from glass-fiberglass, it penetrates into the non-impregnated binder layer of glass fiber 13, which is coated with polyethylene pipe 12, and after polymerization of the bonding fiberglass layer 18

The biplast tube 19 in the polymerization chambers 9 is cut into sections of the required length with a cutting device 11.

The biplastmass pipe obtained has a good mechanical bond between the fiberglass and polyethylene shells due to the correct plaster of the polyethylene pipe not impregnated with the bonding layer of glass fiber fabric.

Claims (2)

1. Installation of dp for continuous production of thermoplastic biplastics pipes, e.g. that, with the chain of the provision of high-quality mechanical connection between the stack-plastic and thermoplastic tube shells, the packing unit consists of a crimping chamber with a protective jacket, chambers bogreva and cooling. 2. Installation according to claim 1, in order to achieve optimum properties of the pipe, the crimping chamber includes a conical section with a difference in diameters from d to O, 96d on a dip line equal to 0.3-0.35 a, gdes1 L-aimeter holes at the beginning of the chamber. Fiberglass Glass tape Polyethylene Fig.Z