RU2400664C1 - Angular reinforced sleeve-compensator - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: sleeve-compensator is made in the form of arc at the angle from 0 to 180° and comprises sealing rubber layer, frame of power layers of rubberised cord/cables/ropes with circumferential direction of threads, auxiliary layers with longitudinal direction of threads/cables/ropes covering all perimeter of sleeve-compensator cross section. Sleeve comprises discrete power layers with longitudinal direction of threads/cables/ropes arranged only at part of perimeter of sleeve-compensator cross section along external and internal radiuses of sleeve-compensator bend, for instance in areas of sectors with angles from 60 to 75°, and preventing sleeve unbending (increase in radius of its bend) and change of cross section profile under action of circumferential and axial forces that occur as a result of inner pressure in sleeve-compensator as liquid is transported in pipeline.

EFFECT: invention improves sleeve reliability.

5 cl, 6 dwg

Description

The invention relates to shipbuilding, in particular to mobile flexible pipes, intended for use in hydraulic systems for transporting liquid through pipes.

Known angular pipe compensator (patent RU No. 2221188, IPC F16L 51/04, publ. 10.01.04, Bull. No. 1) containing nozzles with flanges, a housing, elastic membranes made in the form of reinforced rubber-cord shells, pressure rings and shaped the knee.

The disadvantages of the known angular nozzle-compensator are large dimensions and design complexity. Known expansion joints are unacceptable for small pipe diameters.

Also known is a reinforced rubber-cord straight-through sleeve (a.s. SU No. 655890, IPC F16L 11/08, publ. 05.04.79, Bull. No. 13), containing an internal sealing rubber layer, a power cage, and an outer rubber layer.

A disadvantage of the known sleeve is that it cannot be mounted in an angular nozzle, namely, in the location of the pipes connected by it, which are at an angle from 0 to 180 ° to each other with a small length of the nozzle, which is insufficient for bending without kink, i.e. . without distortion of the internal section of the sleeve during installation. In addition, the pipeline into which such a pipe with a bend is installed is subject to additional forces arising from the pipe tending to straighten under the influence of its own rigidity and pressure of the working medium.

The technical result of the claimed angular reinforced sleeve-compensator for movable flexible pipes is to simplify the design, reduce overall dimensions and weight with great flexibility, increase the service life.

The technical result is achieved by improving the structure of the power frame, making it in the form of an arc at an angle from 0 to 180 °, which allows large shear movements in three planes, simplifying installation in pipelines at an angle to each other, reducing stiffness and spacer forces affecting the pipeline.

The invention is illustrated by drawings:

figure 1 - an angular rubber sleeve compensator with a fragment of a longitudinal section of the side zone;

figure 2 is a transverse section of the sleeve;

figure 3 - the position of the lower (inner) discrete layer with the longitudinal direction of the threads;

figure 4 - the position of the layer with the circumferential direction of the threads;

figure 5 - position of the upper (outer) discrete layer with the longitudinal direction of the threads;

6 - the location of the threads / cables of smaller caliber in the spaces between the threads / cables of large caliber in the layer with the circumferential direction of the threads.

Corner reinforced rubber / rubber-like sleeve-compensator (Fig. 1) for movable flexible pipe fittings, made in the form of an arc at an angle from 0 to 180 °, contains an inner rubber layer 1, layers of the sleeve frame 2, 3, 4, 5, 6, the outer layer of rubber 7 (figure 2).

The inner (sealing) layer of rubber 1 ensures the tightness of the cavity of the sleeve-compensator and protects the power frame from the effects of the transported medium. Layers 2, 4 and 5 of the frame are located around the entire perimeter of the cross section of the sleeve, while in the auxiliary layers 2 and 5, the threads / cables / cords are located along the longitudinal axis of the sleeve, and in the power layer of the frame 4 in the circumferential direction. Layers (stripes) 3 and 6 of the power frame are discrete and cover only the lower and upper parts (zones) of the circumference of the cross section, for example, with the corners of sectors a of the order of 60 to 75 ° (Fig. 5). Threads / cables / cords in these layers are located along the longitudinal axis of the sleeve (Fig.2, 3, 4, 5). Layer 3 is located above layer 4 (FIGS. 2, 4, 5) in the sector along the inner bend radius of the sleeve, and layer 6 is located above layer 5 (FIGS. 2, 5) along the outer bend radius of the sleeve.

The edges of the auxiliary and discrete layers (bands) of the power frame with a longitudinal arrangement of threads / cables / cords are rigidly fixed to the side rings 8 (Fig. 1), the layer / layers of the power frame with the circumferential direction of the threads / cords / cables is located / located above the layers of the power frame with the longitudinal direction of the threads / cords / cables and rigidly fixed / secured in the side rings.

The outer layer of rubber 7 protects the power cage from environmental influences.

Corner reinforced sleeve-compensator works as follows.

Through a flange connection sleeve-compensator (figure 1) is installed in the pipeline. When the working medium of the transported medium is created in the pipeline, a discrete layer / layers of the power frame with a longitudinal arrangement of threads / cords / cables perceives / perceives axial (spacer forces), and a layer / layers with a circumferential direction of threads / cords / cables perceives / perceive circumferential forces. In this case, the discrete / discrete layer / layers (strip / strips) 3 of the power cage (FIGS. 2, 5) with a longitudinal arrangement of threads / cords / cables creates / creates additional resistance that prevents extension (increase the radius of curvature of the sleeve), and the discrete layer / layers (strip / strip) 6 of the power frame, also with a longitudinal arrangement of threads, contributes / contribute to maintaining the cross section of the sleeve of a circular shape.

A similar result can be achieved by replacing discrete force layers with force layers that cover the entire cross section of the sleeve, however, this significantly increases both the weight of the sleeve and its rigidity with relative displacement of the ends of the sleeve-compensator in any direction, while the strength characteristics of the sleeve remain unchanged .

Layers 2 and 5 are auxiliary and ensure the tightness of the sleeve, since they prevent the punching of the inner layer of rubber 1 between the threads / cords / cables of layers 3, 4, 6 (Fig. 5) under the influence of the working pressure of the medium.

The layering of the power frame and its material is determined depending on the operating parameters of the expansion joint (diameter of the pipeline, working pressure of the medium, stiffness parameters, etc.).

To reduce the wall thickness and weight of the sleeve, as well as to reduce its stiffness, the power frame is made using high-modulus Rusar fibers or chemical fibers such as kapron, an anide in the form of cord threads / cords / cables.

Auxiliary layers of the frame 2 and 5 (figure 2) with the longitudinal direction of the threads can be made of cord / cable with a smaller caliber (lower strength) than the discrete layers of the power frame located along the inner and outer radii of the sleeve 3 and 6 (figure 2 ), and may differ in the type of fiber used.

To increase the strength of the expansion joint between the threads / cords / cables of the force layer with the circumferential direction of the threads, threads / cords / cables with a smaller caliber (lower strength) can be placed and may differ in the type of fiber used (Fig. 6).

The proposed design allows the manufacture of angular reinforced sleeves-compensators of various diameters with minimum dimensions.

The implementation of the reinforced expansion sleeve in the form of an arc ensures the preservation of the shape of the internal section of the expansion sleeve during installation in pipelines located at an angle from 0 to 180 ° to each other, and reduces the stiffness of the expansion joints.

The proposed structure of the power cage increases its flexibility, reduces the spacer forces and thus provides, without changing the cross-sectional shape, the possibility of large shear movements in three planes when transporting the working medium through pipelines, simplifies the installation of the expansion sleeve in pipelines at an angle from 0 to 180 ° to each other, and also reduces the stiffness parameters of the expansion joints and increases their resource.

During the study, the company developed and manufactured an easy-to-use and reliable in operation design of an angled reinforced sleeve-compensator for movable flexible pipes. The company has positive experience in manufacturing high-quality angular reinforced expansion joints.

Claims (5)

1. An angled reinforced rubber / rubber-like expansion sleeve for movable flexible pipes, comprising an internal sealing layer, carcass layers with a circumferential and longitudinal arrangement of threads / cords / cables, an outer protective layer, characterized in that the carcass of the expansion sleeve, in addition to auxiliary layers, covering the entire perimeter of the cross section, additionally contains discrete layers (strips) of the power frame with a longitudinal arrangement of threads / cords / cables laid on the inside of the circumference of the cross section the outer and outer bending radii of the sleeve above the layer / layers of the power frame with the circumferential direction of the threads / cords / cables, rigidly fixed to the side rings. 2. An angled reinforced rubber / rubber-like sleeve-compensator for movable flexible pipes according to claim 1, characterized in that the discrete layers (strips) of the power frame with the longitudinal direction of the threads / cords / cables overlap the cross-sectional sections of the compensator sleeve in sectors with order angles from 60 to 75 °. 3. An angled reinforced rubber / rubber-like sleeve-compensator for movable flexible pipes according to claim 1, characterized in that the layers of the power frame are made of threads / cords / cables made of high-modulus Rusar fibers. 4. An angled reinforced rubber / rubber-like sleeve-compensator for movable flexible pipes according to claim 1, characterized in that between the threads of a large caliber of the carcass force layer with the circumferential direction of the threads / cords / cables of large diameter (large strength) there are threads of small diameter (small strength) from high-modulus fibers of the Rusar type or chemical fibers of the Kapron and Anide type. 5. The angled reinforced rubber / rubber-like sleeve-compensator for movable flexible pipes according to claim 1, characterized in that the auxiliary layer / layers covering the entire perimeter of the cross section with the longitudinal direction of the threads is made / made of threads with a smaller caliber (lower strength), than threads / cords / cables of discrete layers of the power frame.

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