Method of manufacture of pipe

FIELD: manufacture of plastic pipes.

SUBSTANCE: proposed method includes placing the thermoplastic envelope on mandrel followed by winding fibrous material containing binder on this envelope and applying the outer polymer layer; then, polymerization is accomplished; twisted roving is used for wrapping the fibrous material at cross position of cords with through passages in between them; these passages are filled with thermoplastic melt for forming outer layer from this melt or by winding thermoplastic tape.

EFFECT: enhanced reliability.

1 dwg

 

The invention relates to the field of pipes made of plastics made with reinforcement.

A known method of manufacturing a composite pipe, including the installation of a mandrel polyethylene tubular billet, application of a layer Sevilen and wound fiberglass material and subsequent heat treatment with the polymerization and cooling (RU # 2150629, CL F 16 L 9/12, 10.06.2000).

The disadvantage of this method is of low reliability due to stratification made him pipe layer Sevillana at sub-zero temperatures and destruction of fiberglass material under external (e.g., sandy "storm") effect.

The technical result of the invention is to improve the reliability of the method.

This is achieved by the fact that in the known method, including the installation of a mandrel termoplastici shell wound on the shell of one of the layers and the polymerization, the winding of fibrous material perform woven roving with the location of the cross wires and education between them through channels, which are then filled from the outside with molten thermoplastic to form the outer layer of the molten thermoplastic.

Winding a fibrous material woven roving with the location of the cross wires and education between them through channels provides communication between termoplastici Obolo the coy and the outer polymer layer through the channels.

Fill through channels outside the melt of thermoplastic provides a fusion melt with termoplastici shell polymerization of fibrous material with a binder and quality bond composite-fiber material with termoplastici shell.

The formation of the outer layer of molten thermoplastic or winding tape on it melt thermoplastic provides a monolithic termoplastici shell with an outer polymer layer and composite fiber material with a high adhesion between the layers of the pipe.

The implementation of the method of manufacturing a pipe according to the invention provides increased reliability.

The invention is illustrated by the drawing, which shows a process card sketches.

In the implementation of the proposed method mounted on the mandrel 1 thermoplasty shell 2, is wound fibrous material 3 with a binder, which cause the outer polymeric layer 4 and perform the polymerization.

The method is characterized by the fact that the winding of the fiber material 3 perform woven roving cross-location withing 5 and education between them through channels 6 (which provides the connectivity between termoplastici shell and an outer polymer layer through the through-channels), which are then poured outside the melt 7 term the reservoir (which ensures the fusion melt with termoplastici shell, polymerization valacyclovir material with a binder and quality bond composite-fiber material with termoplastici shell) and is formed outside the outer layer 4 of the melt 7 thermoplastic or winding him tape 8 melt thermoplastic (which ensures the monolithic termoplastici shell with an outer polymer layer and composite fiber material with a high adhesion between them).

A method of manufacturing a pipe (due to the increased adhesion between the layers and increase the solidity) has a high reliability and can be used for the manufacture of pipes operating at sub-zero temperatures.

A method of manufacturing a pipe, including the installation of a mandrel termoplastici shell wound on the shell of fibrous material with a binder, coating the outer polymer layer and polymerization, characterized in that the winding of fibrous material perform woven roving with the location of the cross wires and education between them through channels, which are then filled from the outside with molten thermoplastic to form the outer layer of the molten thermoplastic or winding him tapes of molten thermoplastic.



 

Same patents:

FIELD: polymer materials.

SUBSTANCE: composition contains 0.05 to 0.24 hydrolyzable silane groups per 100 methylene units and shows standard density at least 954 kg/m3. Flowability factor of composition melt is below 1.5 g/10 min under loading 5 kg and above 2 g/10 min under loading 21.6 kg as measured in accordance with ASTM standard D 1238. Tube manufacture process envisages extrusion of composition in the form of tube in the first stage and subsequent hydrolysis of the tube in order to link cross-linkable polyethylene. Tubes manufactured according to present invention show high long-term resistance to pressure above 12.5 MPa as measured according to ISO/TR standard 9080 and can be used for transportation of fluid substances under high pressure.

EFFECT: improved consumer's quality of tubes.

13 cl, 4 ex

FIELD: pipeline engineering.

SUBSTANCE: reinforced polymeric pipe comprises inner and outer polymeric layer and reinforcing layer interposed between them and made of high-module fibers or cords, at least two layers of longitudinal rods and transverse rods wound on the longitudinal rods. The longitudinal rod is provided with thickenings throughout its length. The longitudinal rods of the first layer are submerged under the outer surface of the inner polymeric layer at a depth close to the half thickening. The method comprises making inner polymeric layer, laying the first layer of the longitudinal rods on its outer side, wounding transverse rods with interference, and forming the outer polymeric layer. Before laying, the longitudinal rods are provided with thickenings, and the outer side of the inner polymeric layer is heated up to plasticizing down to a depth of close to the half thickness. When winding the first transverse layer, the tension is chosen sufficient for the embedding the thickenings of the first layer of the longitudinal reinforce into the plasticized layer throughout its depth.

EFFECT: improved adhesion of reinforce with polymer.

2 cl, 1 dwg

FIELD: pipeline engineering.

SUBSTANCE: polymeric reinforced pipe comprises grid frame made of longitudinal metallic rods and transverse rods made of high-module fibers or cords wound along the longitudinal rods. The grid frame in the polymeric unit has additional lateral layer made of metallic rods wound directly on the longitudinal metallic rods. The transverse reinforcing rods made of high-module fibers are wound to provide several mutually perpendicular layers and are housed in the polymeric unit from the outer side of the layer of the metallic transverse rods. The method comprises feeding the longitudinal metallic reinforcing rods to the mandrel, making the layer of transverse reinforce made of high-module fibers, and filling the frame with a polymer. The transverse reinforcing layer made of metallic rod is directly wound on the metallic longitudinal rods, the frame is filled with a polymer, and then several mutually perpendicular layers of the transverse rods are wound on the surface obtained. The polymer is poured again. The longitudinal metallic rods are fed to the mandrel until the cross-section of the pipe is defined.

EFFECT: enhanced strength.

2 cl, 2 dwg

FIELD: rigid pipes.

SUBSTANCE: cylinder wall comprises at least one layer made of fibers oriented at least in one direction. The total thickness of the wall dtot ranges from 0.010 mm to 1 mm. The ratio dtot/D ≥ 0.0025.

EFFECT: improved method of manufacturing.

20 cl, 4 dwg

Biplastic pipe // 2248493

FIELD: plastic pipes.

SUBSTANCE: in proposed biplastic pipe with inner layer made of thermoplast, outer layer of glass plastic and stiffening ribs secured on outer surface of inner layer, height of stiffening ribs h is determined by formula h>Δα·Δt·din, where Δα is different of coefficients of linear thermal expansion of materials of inner and outer layers; Δt is difference in maximum and minimum temperatures of transferred medium; din is outer diameter of inner layer.

EFFECT: improved strength and operation reliability of biplastic pipe.

3 cl, 3 dwg

Biplastic pipe // 2248492

FIELD: plastic pipes.

SUBSTANCE: in biplastic pipe with inner layer made of thermoplast, outer layer made of glass plastic and grooves made on outer surface of inner layer, depth of grooves h is determined by formula h>Δα·Δt·din, where Δα is difference in coefficients of linear thermal expansion of materials of inner and outer layers; Δt is difference in maximum and minimum temperatures of transferred medium; din is outer diameter of inner layer.

EFFECT: improved strength and operation reliability of biplastic pipe.

3 cl, 3 dwg

Pipe // 2244866

FIELD: pipeline engineering.

SUBSTANCE: pipe has wall provided with flat sections. The longitudinal projections and mating hollows are provided in the middle of opposite flat sections of the wall.

EFFECT: enhanced reliability of joining.

2 cl, 3 dwg

Pipe // 2240463
The invention relates to the field of pipe

Pipe // 2239744
The invention relates to pipes of plastics made with reinforcement

The invention relates to the structures of membranes and can be used in pipes-shells made of composite materials, in particular in the compartments, connecting the hulls of aircraft In the pipe-casing made of composite materials containing its corresponding profile of the structural frame of the arched rib-cellular structure with integral frames, with light filler between the ribs formed by layers of intersecting systems of high modulus filaments spiral and circumferential directions, bonded utverzhdennym polymeric binder, lightweight aggregate made of expanded polyethylene, monocitarnogo side edges of the power frame with a continuous film of polyethylene with a density of 0.6-0.8 g/cm3when it is the specific density of 0.1-0.15 g/cm3equipped with mesh substrate of glass or baselton, bonded with him an adhesive composition based on chemically slivaushiesia polyolefin, located on the inner surface of the power frame arched rib-cellular structure and bonded with him polymeric binder

FIELD: water supply systems.

SUBSTANCE: shaped section comprises housing with thread, sealing ring, pressing bushing, nut, and conical clamping ring with ring grooves made of ring teeth provided with cut throughout the length of the ring and without groove in the inner diameter for permitting the nut to be screwed in up to the stop and locking the pipe by means of teeth of the conical clamping ring. The sealing ring is flexible, and pressing bushing has no projections.

EFFECT: simplified structure and enhanced reliability.

2 dwg

FIELD: transport pipeline building, particularly to connect reinforced plastic pipes.

SUBSTANCE: device has semi-cylinders with shoulders and ledges at their ends, as well as fastening unit to connect semi-cylinders. Fastening unit is made as rings secured to the ledges.

EFFECT: increased pipeline connection reliability.

1 dwg

Pipe // 2255265

FIELD: rigid pipes.

SUBSTANCE: pipe comprises thermoplastic shell with the locking collar and fiber glass layer which embraces it. The collar is made of an unclosed ring secured to the shell through a glue-melt. The pipe is provided with an additional device for securing the ring. The device which is made of a layer of adhesive belt which embraces the ring and shell sections which abuts against it.

EFFECT: enhanced reliability and simplified assembling.

1 dwg

Pipe // 2255264

FIELD: rigid pipes.

SUBSTANCE: pipe comprises polymeric sealing layer with the locking collar and reinforcing fiber glass layer. The collar is cylindrical and made of a layers of adhesive polymeric belt wound each other. The pipe is provided with rest rings interposed between the reinforcing layer and the face collars.

EFFECT: enhanced reliability.

1 dwg

Pipe // 2255263

FIELD: connecting arrangements or fittings.

SUBSTANCE: pipe comprises thermoplastic shell provided with locking collar and fiber glass layer which embraces it. The shell is provided with the second locking collar. The collars are provided with conical face surfaces and arranged in the vicinity of the pipe ends.

EFFECT: enhanced reliability.

1 dwg

FIELD: erection of transport pipe lines; manufacture of pipe connection units from composite materials.

SUBSTANCE: proposed method includes manufacture of two metal tips with alternating convexities and recesses on their outer surfaces and placing them in winding unit. Duplicate sealing layers made from elastomer, anti-adhesive gasket and separating layer are laid in succession on each of them; they do not reach outer edges of duplicate layers and main sealing layer. Circular elastic cords are laid of anti-adhesive gasket and ends of anti-adhesive gasket are bent around circular cords; separating layer embraces circular cords together with ends of gasket. Then, fittings impregnated with binder are wound on stack and binder is hardened at heating.

EFFECT: enhanced reliability of hermetic joint.

2 cl, 12 dwg

FIELD: construction.

SUBSTANCE: cylindrical spaces of the housing made of monolithic polymeric unit receives the ends of pipes to be joined abut, e.g., by welding. The polymeric unit houses movable reinforcing frame with longitudinal members and heating members arranged from the side of inner surfaces of the spaces. The housing is made of a bushing made of polymeric material provided with radial projections on the faces. The longitudinal members of the reinforcing frame are made of fibers winding along the longitudinal axis of the bushing between the radial projections of the bushing faces and are set in the monolithic polymeric unit.

EFFECT: expanded functional capabilities.

4 cl, 4 dwg

The invention relates to the field of pipeline construction from plastic, for example polyethylene, pipes, reinforced by high-strength fibers

The pipeline // 2241892
The invention relates to pipeline transport and is used in the manufacture of tubes made of composite materials

The pipeline // 2241891
The invention relates to pipeline transport and is used in the manufacture of reinforced plastic pipes

FIELD: construction.

SUBSTANCE: cylindrical spaces of the housing made of monolithic polymeric unit receives the ends of pipes to be joined abut, e.g., by welding. The polymeric unit houses movable reinforcing frame with longitudinal members and heating members arranged from the side of inner surfaces of the spaces. The housing is made of a bushing made of polymeric material provided with radial projections on the faces. The longitudinal members of the reinforcing frame are made of fibers winding along the longitudinal axis of the bushing between the radial projections of the bushing faces and are set in the monolithic polymeric unit.

EFFECT: expanded functional capabilities.

4 cl, 4 dwg

Up!