RU2636976C1 - Rubber-cord element - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: rubber-cord element consists of a power frame, an internal sealing rubber layer, an outer rubber layer, and also comprises a bead ring and an elastic bead ring around which the edges of the power frame are wrapped, and a connecting flange at each end. By crimping the power frame with two half flanges with a profile protrusion opposite the conical surface of the main bead ring recess and inner surface diameters less than the corresponding diameters of the outer rubber layer and the power frame in a free state, the reliability and life of the rubber-cord element increases with simplification of its assembly.

EFFECT: increased tightness and reliability.

4 cl, 4 dwg

Description

The invention relates to chemical engineering, namely to flexible elements of pipelines of hydraulic and pneumatic systems for various purposes, operating under pressure.

Known pipe connection (copyright certificate SU 1158812, IPC F16L 23/02, publ. 05/30/85, bull. No. 20) containing flanges and a clamp covering them, consisting of two segments.

A disadvantage of the known technical solution is the impossibility of its use for connecting pipes operating at high internal pressures.

The closest in technical essence and the achieved technical result to the claimed rubber-cord element is a rubber-cord element (patent RU 2 322 630, F16L 11/08, publ. 04/20/2008, bull. No. 11) containing a sealing layer, a power frame mounted on the main and an additional (elastic) side rings, the outer rubber layer, the inner flange, the intermediate ring and the outer flange.

The disadvantages of the known rubber-cord element are low reliability and insufficient service life due to the large displacement of the additional bead ring along the conical surface of the groove of the main bead ring when the rubber-cord element is operating under high pressures and the complexity of its assembly.

The technical result of the claimed invention is to increase the reliability and service life of the rubber cord element while simplifying its assembly.

The technical result is achieved by compressing the power frame with two half flanges having a profile protrusion opposite the conical surface of the recess of the main bead ring and the inner surface diameters smaller than the corresponding diameters of the outer rubber layer and the power frame in the free state (before assembling the rubber cord element) by Δ.

The essence of the claimed technical solution is illustrated by the following drawings:

FIG. 1 is a General view of the inventive rubber cord element;

FIG. 2 is a cross section of the inventive rubber cord element in the mounting region;

FIG. 3 - section of the inner flange;

FIG. 4 - rubber layer and power frame in a free state.

The claimed rubber cord element consists of a power cage 1, an inner sealing rubber layer 2, an outer rubber layer 3, and also contains a bead ring 4 and an elastic bead ring 3 at each end, around which the edges of the power cage 1 are wrapped; a connecting flange 6 connected by an inner flange 7 to the bead ring 4 (Fig. 1), while the elastic bead ring 5 is laid in the groove of the bead ring 4 having a conical surface in the region Q of the transition from the inversion of the edges of the power frame 1 around the onboard ring 4 to the inversion around the elastic side ring 5 (Fig. 2). To simplify assembly, the inner flange 7 of the claimed rubber-cord element consists of two half-flanges and comprises a protrusion 8 opposite the conical surface Q of the recess of the bead ring 4. A connecting flange 6 fixes the rubber-cord element relative to other pipeline elements through a bolted connection. The half flanges of the inner flange 7 are connected in any known manner, for example, by a bolt or weld joint. The diameters D of the inner surface of the flanges in the compression area of the outer rubber layer 3 and the power cage 1 (Fig. 3) are smaller than the corresponding diameters of the outer rubber layer 3 and the power cage 1 in the free state (before assembling the rubber cord element, Fig. 4) by Δ . The value of Δ is chosen when designing a rubber cord element.

The bead ring 4 is connected to the connecting flange 6 by two half-flanges of the inner flange 7 by a yoke connection, which simplifies the assembly of the rubber cord element, since the yoke connection refers to quick disconnect connections. In addition, since in the inventive rubber cord element, the diameters D of the inner surface of the half flanges in the compression area of the outer rubber layer 3 and the power cage 1 (Fig. 3) are smaller than the corresponding diameters of the outer rubber layer 3 and the power cage in the free state by A, the connection of the half flanges declared rubber-cord element provides compression of the outer rubber layer 3 and the power frame 1 by a value of A, which prevents separation of the rubber layer 3 and the power frame 1 during operation of the gum rdnogo element, thereby increasing the reliability and service life.

The claimed rubber cord element works as follows.

A working medium is supplied into the internal cavity of the rubber cord element under pressure. The sealing rubber layer 2 ensures the tightness of the rubber cord element. The outer rubber layer 3 protects the power frame 1 from the effects of the external environment. Under the influence of the pressure of the working medium in the power cage 1, a tension arises, which tends to stretch (slide) the elastic bead ring 5 from the groove of the bead ring 4 along the conical surface Q (Fig. 2). The shift of the elastic bead ring 5 along the conical surface Q quickly increases the contact pressure between the bead ring 4 and the elastic bead ring 5 (jamming effect), which prevents further movement of the elastic bead ring 5. In the inventive rubber cord element, the inner flange 7 has a protrusion 8 opposite the conical surface Q recesses of the bead ring 4. The surface of the protrusion 8 forms an angle α with a horizontal plane, as a result of which the shift of the elastic bead ring 5 along the protrusion 8 also has the effect jamming and quickly increases the contact pressure between the inner flange 7 and the elastic bead ring 5. The addition of contact pressures on the conical surface Q and the protrusion 8 significantly reduces the shear of the elastic bead ring 5 when the rubber-cord element is operating under high pressures, which ensures the initial geometry of the rubber-cord element in the process its work, thereby increasing its reliability and service life.

The company has positive experience in the manufacture and operation of rubber-cord elements of the claimed design.

Claims (4)

1. The rubber-cord element comprising a power cage, an internal sealing rubber layer, an external rubber layer at each end comprising a bead ring and an elastic bead ring around which the edges of the power cage are wrapped; a connecting flange connected by an inner flange to the bead ring, wherein the elastic bead ring is laid in the groove of the bead ring having a conical surface in the transition region from the inversion of the edges of the power frame around the bead ring to the inversion around the elastic bead ring, characterized in that each inner flange consists of of two interconnected semi-flanges and contains a protrusion located opposite the conical surface of the recess of the side ring. 2. The rubber cord element according to claim 1, characterized in that the diameters of the inner surface of the flanges of the inner flanges in the area of compression of the outer rubber layer and the power cage are smaller than the corresponding diameters of the outer rubber layer and the power cage in the free state by Δ. 3. The rubber-cord element according to claim 1, characterized in that the Δ value is chosen when designing the rubber-cord element. 4. The rubber cord element according to claim 1, characterized in that the flanges of the inner flange are connected in any known manner.

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