RU2650448C1 - Collar made of elastic material - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: collar comprises two cylindrical parts of different diameters arranged eccentrically relative to each other and connecting their flat part with branches made thereon for protective tubes of communication cables. Cylindrical part of the smaller diameter is located on one side of the flat part and connected over the circumference through a corrugation in the form of a concave oval. The cylindrical part of the larger diameter is located on opposite side of flat part and connected over entire circumference through a corrugation in the form of an oval part in cross-section. A stop is made on inner side of the cylindrical part of the larger diameter to protect the collar from improper installation. At the end in the upper point of the cylindrical part of the larger diameter there is a mark in the form of a petal for centering the collar relative to the pipeline and the protective casing. The branches are in the form of protective tubes of the communication cables used as a whole with the collar and arranged horizontally in the its upper part.

EFFECT: preventing the collar from sliding from protective casing, reduction of stress in the collar and reduction of installation time.

4 dwg

Description

The invention "cuff made of elastic material", hereinafter the cuff, made mainly of rubber, relates to seals of the annulus of the transition between the protective casing and the transition pipe.

The invention is used to seal the annulus of the transition between the oil and gas pipeline, hereinafter the pipeline, with a diameter of 57-2220 mm and a protective casing with a diameter of 219-2550 mm, laid under roads, engineering structures, water barriers, in moist soils, swamps, in areas with harsh conditions and permafrost.

When laying a pipeline over rough terrain, roads, engineering structures, rivers, and swamps are encountered. At the intersection under obstacles, the transition pipeline is laid on the supporting-guide rings in the protective casing, where it has been used for more than 30 years. The transition pipeline is not symmetrical with respect to the protective casing, since it is always larger in diameter than the transition pipeline.

When assembling the transition pipeline under obstacles, its end parts are sealed with conical rubber cuffs from getting into the annulus of the transition of the moist environment. In known cuffs, the cylindrical parts for the pipeline and the protective casing are made coaxially (not eccentrically).

When mounting the cuff for sealing the annular space of the transition, in order to put the cylindrical part of the cuff on the protective casing, it must be stretched and deformed. As a result, the cuff mounted on the pipeline and the protective cover acquires an indefinite shape with sharp angles due to the fact that the cuff has cylindrical parts for the pipeline and the protective cover not eccentric.

The deformation of the cuff contributes to its disruption from the protective casing during operation and the ingress of a moist environment into the annulus of the transition. In addition, to prevent the cuff from tearing off the protective casing when moving the pipe in the axial direction on the cuff, a corrugation is artificially created by pressing the conical part of the cuff inside the protective casing, which additionally creates stresses on the cuff.

During operation of the pipeline transition during periods of changing seasonal temperatures and increasing temperature of the pumped product, the transition pipeline moves axially and the cuff slides off the protective casing due to stresses on the cuff during its installation. As a result, moisture enters the annulus of the junction, which shortens its life.

Known rubber cuff, patent RU 2206003, class. F16J 15/32, containing two cylindrical parts for the pipeline and the protective casing, located coaxially or eccentrically, and connecting their transition conical part. The disadvantage is that the cuff is made without corrugation, the cylindrical openings for the pipeline and the protective casing are connected by the conical part, on which it is necessary to manually execute the corrugation without taking into account its length by pressing the conical part into the protective casing, which creates additional stress on the cuff.

In addition, sealing with a conical cuff of the annulus of the transition is not completely solved by making corrugations on the cuff by pressing the conical part of the cuff into the protective casing arbitrarily, without taking into account its length.

As a result of deformation, the conical part of the cuff is deformed together with the corrugation, which was created by pressing the conical part into the inside of the protective casing. The cuff also assumes an indefinite shape with various sharp angles leading to the appearance of residual deformation forces.

The deformation of the cuff contributes to its sliding off the protective casing when moving the pipeline in the axial direction, and the goal is to create corrugations on the cuff for reliable sealing of the annular space of the transition does not achieve the desired effect.

Known informal detachable rubber cuff made of elastic material, patent RU No. 2206004, class. F16J 15/32 (prototype), where the cylindrical parts of the cuff for the pipeline and the protective casing are connected by a conical transitional part, in addition, the cuff is made without corrugation, which is a significant disadvantage.

The cuffs mentioned have another significant drawback - the rubber bends for the protective pipes of the communication cables are made on the conical part of the cuff at an angle of 30-45 ° not aligned with the protective pipes of the communication cables, which are laid horizontally in the transition on the pipeline, which creates additional stresses on the cuff during its installation, which also contributes to its sliding from the protective casing when moving the transition pipeline in the axial direction.

Known cuff, patent RU 2285854, IPC F161 7/02, where the bends for the protective pipes of communication cables are made on the conical part at an angle of 30-45 ° as a unit with the cuff is not coaxial with the protective pipes of communication cables that are mounted on the pipeline in the upper part of the guide rings in a horizontal position.

The objective of the invention is to remedy these shortcomings and develop a modern informal cuff with a 20% reduction in total weight by reducing the length of the conical part of the cuff, which will allow it to be successfully used for transitions at large diameters for pipelines 57-2220 mm and for the protective casing 219- 2550 mm. In addition, the convenience of installation, the use of large diameters, the increase in the life of the pipeline transition due to structural changes and stress relief on the cuff are significant advantages over conical rubber cuffs.

Due to changes in the design of the cuff, including the execution on the cuff of the horizontal bend for the protective pipe of communication cables as a unit with the cuff, stresses are removed when it is mounted on the transition pipe, the cuff is prevented from sliding off the protective casing when moving the pipe in the axial direction and installation time is reduced in the field.

The task is achieved by performing the cuff informal way, with corrugation, from an elastic material, such as rubber. The cuff of elastic material is designed to seal the annulus of the transition when laying a pipeline with a diameter of 57-1420 mm in a protective casing with a diameter of 219-1720 mm. The cuff contains two cylindrical parts of different diameters arranged eccentrically with respect to each other and a flat part connecting them. On the flat part, bends are made for protective pipes of communication cables mounted horizontally on the upper part of the transition pipeline. The cylindrical part of a smaller diameter is located on one side of the flat part and is connected around the circumference through the corrugation in the form of a concave fillet. The cylindrical part of a larger diameter is located on the opposite side of the flat part and is connected around the entire circumference through a corrugation having the cross-sectional shape of the oval part. Moreover, to protect against improper installation of the cuff, an emphasis is made on the inside of the cylindrical part of a larger diameter. At the end at the upper point of the cylindrical part of the larger diameter, a mark is made in the shape of a petal, which is laid during the manufacture of the cuff, to center the cuff relative to the pipeline and the protective casing during its installation. The bends are made in the form of the used protective pipes of the communication cables as a single unit with the cuff and are located horizontally in its upper part.

The essence of the alleged invention is illustrated by drawings, where:

in FIG. 1 shows a cuff with a vertical flat connecting part, on which opposite cylindrical parts of various diameters are made and a branch for the protective pipe of communication cables, made in a horizontal position;

in FIG. 2 shows the transition of the pipeline on the support-guide rings in the protective casing assembly with a sealing sleeve and a protective pipe for communication cables;

in FIG. 3 shows a mark on a cuff with opposite cylindrical parts for the transition pipe and the protective casing;

in FIG. Figure 4 shows an emphasis for protection against improper assembly of the cuff at the transition of the pipeline, a corrugation on the cuff and a branch for the protective pipe of communication cables located horizontally in the upper part of the cuff on the vertically flat connecting part in the form of a circle.

The elements depicted in the drawings are indicated by the following positions:

1 - cuff;

2 - transition pipeline;

3 - a protective casing;

4 - flat connecting part;

5 - a cylindrical part of the cuff for mounting on the transition pipeline with a diameter of 57-2220 mm;

6 - cylindrical part of the cuff for mounting on a protective casing 219-2550 mm;

7 - corrugation;

8 - horizontal branch for the protective pipe of communication cables;

9 - a protective pipe of communication cables;

10 - supporting guide rings;

11 - emphasis;

12 - coupler clamps.

13 - mark for centering the cuff.

The cuff 1 is made of an elastic material, such as rubber, and is designed to seal the annular space of the transition pipe 2, laid in a protective casing 3 under roads, engineering structures and water barriers, in moist soils, swamps, in areas with harsh conditions and permafrost.

The cuff 1 contains a vertical flat connecting part 4 in the form of a circle on which opposite cylindrical parts 5, 6 of different diameters are made, which are eccentric with respect to each other.

The cylindrical part 5 of the cuff is designed for mounting on the transition pipe 2 with a diameter of 57-2220 mm, the second cylindrical part 6 of the cuff is located on the opposite side of the flat part 4 and is intended for mounting on the protective casing 3 (Fig. 2, 4) with a diameter of 219-2550 mm. The cylindrical part 5 of a smaller diameter is connected to the flat part along the circumference through the corrugation in the form of a concave fillet (in Fig. 4 the radius of the fillet R is indicated). The cylindrical part 6 of a larger diameter is connected to the flat part 4 along the entire circumference through the corrugation 7 (Fig. 1, 4), having in cross section the shape of the oval part. This shape of the cross section of the corrugation allows you to redistribute and reduce the load acting on the cylindrical part 6 when moving the flat part 4.

At least one horizontal branch 8 is made in the form of the used protective pipe 9 of the communication cable as a unit with the sleeve 1 and is located horizontally in its upper part (on the flat connecting part 4). This location of the bends 8 on the flat connecting part 4 is due to the fact that the protective pipes of the communication cables 9 are mounted in a horizontal position above the transition pipe 2. This eliminated the deformation of the cuff when it is mounted on the transition pipeline.

To protect against improper installation of the cuff 1 on the inner side of the cylindrical part 6 of a larger diameter made stop 11, for example, of rectangular shape. At the end at the upper point of the cylindrical part 6 of a larger diameter, a mark is made in the form of a petal 13 for centering the cuff 1 relative to the pipe 2 and the protective casing 3 when mounting the cuff 1.

Cuff 1 works as follows.

After pulling the pipe 2 on the support rings 10 into the protective casing 3, the cuff 1 is mounted by putting it on the pipe 2 and the protective casing 3 while the cuff is advanced until the stop 11 contacts the end of the protective casing 3. Correct placement of the cuff 1 on the protective the casing 3 is checked by a mark in the form of a petal 13 at the end at the upper point of the cylindrical part 6. Then, the corrugation 7 is straightened and the cuff 1 is fixed with clamps 12 to seal the annulus of the transition. Installation of the cuff 1 is carried out without deformation and without pressing a flat part into the inside of the protective casing 3 (Fig. 2, 4). This is achieved by the fact that the cuff 1 (in contrast to the known analogues) contains a vertical flat connecting part 4 (instead of a conical connecting part) on which opposite cylindrical parts 5, 6 of different diameters are arranged, which are eccentric with respect to each other.

During operation of the pipeline 2, when seasonal temperatures change and the temperature of the pumped product (oil, gas) rises, the pipeline begins to move in one direction in the axial direction, and the sleeve 1 begins to deform depending on the movement of the pipeline to the right or left. In this case, the deformation of the cuff 1 is carried out only in the corrugation 7 - freely, without folds, angles, tension and without residual deformation forces, which prevents the rubber cuff from sliding off the protective casing.

Currently, two cuffs are manufactured, which, when tested, showed positive results. There are also a number of advantages in terms of reducing weight, overall dimensions, cost, as well as increasing the convenience of mounting the cuff and increasing the life of the pipeline transition. All this allows the use of these cuffs for the transition pipeline with a diameter of 57-2220 mm and for a protective casing with a diameter of 219-2550 mm.

Claims (1)

A cuff of elastic material for sealing the annulus of the transition when laying a pipeline with a diameter of 57-1420 mm in a protective casing with a diameter of 219-1720 mm, containing two cylindrical parts of different diameters eccentrically relative to each other and connecting their flat part with bends for it protective pipes of communication cables mounted horizontally on the upper part of the transition pipeline, characterized in that the cylindrical part of a smaller diameter is located on one of the sides of the flat part and is connected around the circumference through the corrugation in the form of a concave fillet, the cylindrical part of a larger diameter is located on the opposite side of the flat part and is connected around the entire circumference through the corrugation, which has the cross-sectional shape of the oval part, while the stop is made to protect against improper installation of the cuff on the inside of the cylindrical part of a larger diameter, and at the end at the upper point of the cylindrical part of a larger diameter, a mark is made in the form of a petal to center the cuff relative to the oprovoda and the guard during its installation, bends are made in the form of applied protective pipe connection cables integral with the sleeve and arranged horizontally in its upper part.

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