RU159047U1 - SEALING CUFF FOR PIPELINE - Google Patents

Abstract

A sealing cuff for a pipeline containing two cylindrical sections and a truncated circular cone connecting them, in which the base of a smaller diameter is eccentric with respect to the base of a larger diameter, while the cuff is made of rubber reinforced with synthetic fabric and made one-piece, and along the line passing along two cylindrical sections and a generatrix of the cone with a beginning at a point located on the circumference of the outer edge of the cylindrical section of a larger diameter and lying at the largest removal from the center of the base of the cone of a smaller diameter with a deviation of not more than ± 20 °, and the end at a point located on the circumference of the outer edge of the cylindrical section of a smaller diameter and lying at the smallest distance from the center of the base of the cone of a larger diameter with a deviation of not more than ± 20 °, .

Description

The utility model relates to sealing cuffs intended for pipeline construction and applications for sealing the space between the protective casing and the pipeline at the crossings through roads and railways, as well as through other engineering structures.

Known sealing cuff for a pipeline in a protective casing, made in the form of an axially compressed corrugated ring or a truncated cone of elastic material (SU 1613775, 12/15/1990).

However, it should be noted that the placement of the pipeline in the protective casing leads to the fact that, under the action of gravity, its longitudinal axis of symmetry shifts relative to the axis of symmetry of the casing. For this reason, the use of the above known sealing device causes its deformation, the magnitude of which depends on the weight of the pipe and the characteristics of the elastic material of the sealing device. In particular, it is obvious that large pipe diameters will cause significant material deformations. In addition, the use of the indicated technical solution is impossible for insulated pipelines, as during operation of the pipeline, it undergoes axial movements.

In addition, a rubber cuff is known that seals a trunk pipeline and a protective casing (case), consisting of two cylindrical sections and a conical part connecting them (RU 2006136856 A, 05/10/2008).

However, the specified technical solution also does not eliminate the above disadvantages.

The closest analogue of the claimed utility model is a sealing sleeve for a pipeline in a protective casing, made in the form of a corrugated ring or a truncated cone of elastic material, while the inner diameter of the ring or a truncated cone, due to the diameter of the pipeline, is eccentric relative to its outer diameter, due to the diameter of the protective the casing, and when performing the cuff in the form of a truncated cone along its length, there is a section (RU 31426 U1, 08/10/2003).

The disadvantage of the above design is the lack of reliability of the sealing cuff, since it is made of unreinforced rubber, and even though the cuff design is eccentric, its resistance to aggressive environments and strength characteristics remain not high.

Utility Model Disclosure

The objective of the claimed utility model is to create a simple, technologically advanced and reliable sealing cuff, designed to seal the space between the protective casing and the pipeline during their installation at the crossings through roads and railways, as well as through other engineering structures.

The technical result of the claimed utility model is to increase the strength of the tight connection of the protective casing and the pipeline.

The specified technical result is achieved due to the fact that the sealing sleeve for the pipeline contains two cylindrical sections and a truncated circular cone connecting them, in which the base of the smaller diameter is eccentric with respect to the base of the larger diameter, while the cuff is made of rubber reinforced with synthetic fabric and made one-piece, and along a line passing through two cylindrical sections and forming a cone with a beginning at a point located on the circumference of the outer edge of the cylinder of a larger section of the larger diameter and lying at the greatest distance from the center of the base of the cone of smaller diameter with a deviation of not more than ± 20 °, and the end at a point located on the circumference of the outer edge of the cylindrical section of the smaller diameter and lying at the smallest distance from the center of the base of the cone of larger diameter with a deviation no more than ± 20 °, risk is inflicted.

The causal relationship of the above essential features of the claimed utility model with the technical result is due to the orientation of each feature of the independent claim to increase the strength of the tight connection of the protective casing and the pipeline, as follows:

- cylindrical sections of the cuff ensure that the cuff adheres to the outer surface of the pipeline and the protective casing over their entire circumference without the formation of folds, dents, waves, sagging, etc., of negative factors that violate the tightness of the connection between the pipeline and the protective casing;

- a truncated circular cone connecting the cylindrical sections of the cuff allows to prevent axial, longitudinal, transverse stresses of the cuff material, which can lead to its deformation and subsequent rupture;

- execution of the base of the cone of a smaller diameter with an eccentricity relative to the base of the cone of a larger diameter provides the cuff design with the ability to not change shape at any diameters of the pipeline and the protective casing, which in turn also reduces and / or prevents axial, longitudinal, transverse stresses of the material of the cuff, which can lead to its deformation and subsequent rupture;

- the execution of the cuff made of rubber reinforced with synthetic fabric provides increased strength properties of the cuff compared to the cuff of unreinforced rubber, so the reinforcing fabric frame, which is a monolithic structure with rubber, increases the resistance of the sealing cuff to stretching, bending, impact, compression;

- performance cuff one-piece provides increased strength properties of the cuff;

- execution of the cuff with a mark, drawn along a line passing through two cylindrical sections and forming a cone with a beginning at a point located on the circumference of the outer edge of the cylindrical section of a larger diameter, and lying at the greatest distance from the center of the base of the cone of a smaller diameter with a deviation of not more than ± 20 °, and the end at a point located on the circumference of the outer edge of the cylindrical section of a smaller diameter, and lying at the smallest distance from the center of the base of the cone of a larger diameter with a deviation of not more than ± 20 °, providing Chiva current orientation of the cuff on the pipe and a protective casing with respect to its eccentricity, which in turn enables to prevent formation of deformations and stresses cuff material capable leakproof connection and reduce the strength properties of the cuff.

The utility model is illustrated by figures 1-3.

In FIG. 1 is a front view of the cuff, where 1 is a cuff, 2 is an integral technological joint;

In FIG. 2 shows a view of the cuff according to BB in FIG. one;

In FIG. 3 shows a view of the integral technological joint along AA in FIG. one.

The principle of installing the cuff on the working pipeline in a protective casing is as follows.

The cuff 1 is mounted with the greatest width upward with the orientation on the pipeline and the protective casing at risk, with the subsequent formation of a corrugation at the edge of the protective casing by longitudinal compression. This corrugation is necessary to maintain the ability to move the pipeline during its operation. When mounting the cuff, it is mounted by moving along the body of the working pipeline and placing the protective casing inside with a concavity. The cuff is installed so that an S-shaped profile is formed across to allow movement of the working pipeline relative to the protective casing during the operation of the junction. The cuff of the sealing cuff on the pipeline and the protective casing is fastened with the help of special metal clamps (not shown in the drawing), and it is necessary to ensure uniform distribution of the cuff on the pipeline and the protective casing.

As an example, to seal the space between the working pipeline with a diameter of 108 to 1420 mm inclusive and the protective casing with a diameter of 325 to 1720 mm, the diameter (a) is 114-1426 mm, with a diameter (D) 325-1720 mm, the weight of the cuff is in within 0.9-13.06 kg, with a length (L) of 210-660 mm, an eccentricity (e) lying within 5-81 mm, and for a pipe diameter of 108 mm the eccentricity (e) is 53 mm, and for pipe with a diameter of 1420 mm eccentricity (e) is 50 mm. The length of the cylindrical part (b) for pipelines with a diameter of 108-426 mm is 80 mm, and for pipelines with a diameter of 530-1420 mm, length (b) is 100 mm. The thickness (S) of the sealing cuff is within 3 ± 0.7 mm, and in places of one-piece technological joints thickening (h) of the cuff is allowed up to 9 mm, with a width (B) of the technological joint from 100 to 200 mm.

The rubber mixture that goes into the manufacture of the cuff has the following indicators: conditional tensile strength, MPa, at least 6.9; elongation at break,%, not less than 250; shore hardness D from 50 to 70; change in elongation at a temperature of (23 ± 2) ° C for 24.0 ± 0.5 h in 20% sulfuric acid in accordance with GOST 4204 or hydrochloric acid in accordance with GOST 3118,%, at least, from minus 30 to plus 20 ; change in elongation in 20% sodium hydroxide according to GOST 4328,%, no less than minus 30 to plus 20; temperature limit of brittleness, ° C, not higher, minus 40.

The risk may be caused by marker, stamping, gluing or other well-known methods.

The synthetic fabric used to reinforce the rubber can be represented by polyester, polyamide and other fabrics that provide quality indicators for the sealing cuff: resistance to aggressive environments, at least 70%; frost resistance, not less than 90%; electrical resistance - 10 ⁸ Ohm · m.

Presented in this application, the description of the design of the sealing sleeve covers only its preferred implementation and should not be used as information that limits other options for the implementation of the claimed device, which should be obvious to a person skilled in the art.

Claims (1)

A sealing cuff for a pipeline containing two cylindrical sections and a truncated circular cone connecting them, in which the base of a smaller diameter is eccentric with respect to the base of a larger diameter, while the cuff is made of rubber reinforced with synthetic fabric and made one-piece, and along the line passing along two cylindrical sections and a generatrix of the cone with a beginning at a point located on the circumference of the outer edge of the cylindrical section of a larger diameter and lying at the largest removal from the center of the base of the cone of a smaller diameter with a deviation of not more than ± 20 °, and the end at a point located on the circumference of the outer edge of the cylindrical section of a smaller diameter and lying at the smallest distance from the center of the base of the cone of a larger diameter with a deviation of not more than ± 20 °, .

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