RU2575506C2 - Device to protect rubber collar at pipe reducer - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: device comprises upper and lower half-bodies, which when assembled produce two cylindrical and a conical parts. With a smaller diameter the device is installed onto the pipeline, and with a larger diameter - onto a case jacket. On the inner surface of end parts of the device there are grooves in the form of a toroidal plane, which serve as seats for a rubber sealing cord. The cord radius is equal to the radius of the toroidal plane, which is made as capable of tight laying of the rubber cord with pressure to seal the space between the outer surface of the sealing collar of the pipe reducer and the inner wall of the device. On the lower surface of the upper half-body at the side of the smaller diameter there may be a drip arranged for passage and sealing of the communication cables protective pipes.

EFFECT: reduced timing for device installation and increased reliability of rubber collar protection.

2 cl, 4 dwg

Description

The invention relates to the transitions of trunk pipelines laid in a protective casing under the roads, railways, engineering structures, water barriers, in areas with harsh conditions and permafrost and can be used to seal the space between the device and the outer surface of the rubber cuff sealing the annular the transition space of the pipeline, and to protect the cuff from getting wet environment and soil on the outer surface of the cuff, as well as to protect against shock and soil pressure during backfilling of the trench during the construction and repair of the transition pipeline.

The invention is intended to protect a rubber cuff with a diameter of 57-2220 mm for the pipeline and a diameter of 159-2634 mm for the casing.

A device is known for protecting a rubber cuff for crossings of trunk pipelines (see patent RU No. 2276753 dated 01.12.2004), made detachable in the form of upper and lower half-shells with shelves at the junction and in the assembly consisting of two cylindrical parts and one conical part.

The device is mounted on the thrust ring of the protective casing-case and rests on the main pipeline. In the lower half-shell there are two radius plates sealing the connector. This device for protecting the rubber sleeve is difficult in terms of manufacturing the design of the thrust ring on which the device for protecting the rubber sleeve is fixed. In addition, the thrust ring on the casing-case does not provide proper tightness between the device and the outer surface of the cuff during operation of the pipeline transition, which is a significant drawback of the device, because a moist environment penetrates with the soil and presses the cuff, as a result of which it becomes inoperative.

Inside the end sides of the semicontainers of the device, limiters are made in the form of two partitions around the entire circumference for seats of rubber sealing cords.

This design of the device for protecting the rubber cuff makes it more expensive due to the manufacture due to the need to fix the partitions for the seats of the rubber cords when they are not snug against the inner seats of the half-cases of the device, because the partitions are made without a radius surface, which limits the contact area of the rubber cord. In addition, considerable time is required when installing them on the pipeline and the casing, as rubber cords are difficult to fix in the seats, preventing them from falling out of the seats during installation.

A device for protecting a rubber cuff is also known, patent RU No. 2435093, class. F16L 1/028, 7/00, taken by the authors as a prototype.

The device consists of two half-shells, mainly made of fiberglass. When assembled, the device forms two diameters: large and small, connected by a conical surface. The small diameter device is installed on the pipeline, and a large diameter on the casing.

The end parts of large and small diameters are made on a cone and contain a side wall. A second parallel side wall is formed in the inner part of the large and small diameters, forming a space that serves as a seat for laying rubber cords in the inner part of the device half-shells to seal the space between the inner part of the device and the outer surface of the rubber transition cuff.

The disadvantage of this device is the presence of two partitions, performing the role of seats for laying rubber cords. Partitions are difficult to integrate with the body of the device. In addition, when hitting the device, when filling the trench during the construction of the pipeline, the partitions are deformed, which contributes to the free passage of moist environment and groundwater into the space between the device and the outer surface of the rubber cuff.

In addition, the rubber cord is difficult to fix between the partitions, which are the seat, even with glue, since they do not have a radius surface, which limits the contact area of the cord with the seat, and it is also difficult to seal against moisture from the rubber cord and the wall of the device the space between the device and the outer surface of the rubber cuff, which reduces the work of the transition of the pipeline, because together with groundwater, soil enters, which fills the free space and presses the cuff. When moving the pipeline, the cuff, pressed down by the soil, stretches, the clamp fastening does not withstand, and it slides off the casing, opening the annular space for ground water, as a result of corrosion, it destroys the support rings and the pipeline, which falls to the bottom of the casing, which leads to accidents at the gas pipeline crossing.

The objective of the invention is to remedy the aforementioned drawbacks and develop a robust device design in terms of seats without a thrust ring and partitions for laying rubber cords with interference, without the use of glue, which provides reliable sealing from the ingress of a moist environment into the space between the inner surface of the device and the outer surface of the cuff sealing the annulus of the pipeline transition. It is also necessary to develop a design for passage through the device of protective pipes for communication cables in the transition of the pipeline.

The essence of the invention lies in the fact that the device for protecting a rubber cuff that seals the annular space at the transitions of the main pipelines laid under roads, railways, as well as under engineering structures, water barriers using a protective casing, consists of upper and lower half-shells , assembled forming two cylindrical and connecting the conical part located between them: a small diameter for installation on the pipeline, and a large diameter - on the casing-case, on the inner surface of the end parts of the device, recesses are made in the form of a toroidal cavity, which serve as seats for a rubber sealing cord, the radius of which is equal to the radius of the toroidal cavity, while this cavity is made with the possibility of tightly laying the rubber cord with an interference fit for sealing the space between the outer surface of the sealing cuff of the transition and the inner wall of the device.

If it is necessary to equip the transition pipelines with protective pipes for communication cables, on the lower surface of the upper half-shell from the side of small diameter, a tide is made with a vertical platform equipped with one or more holes in which sealing couplings are installed for the passage and sealing of one or more protective pipes of communication cables, and bends are made in a rubber cuff for sealing the annulus.

The invention is illustrated by drawings, where:

Figure 1 shows a General view of the device at the transition of the pipeline with protective pipes for communication cables;

Figure 2 shows a General view of the device;

Figure 3 - view A shows a device with holes and sealing sleeves for laying protective pipes for communication cables.

Figure 4 - view B shows a toroidal cavity for seats rubber cords;

The proposed device 1 (Fig. 1, 2) for protecting the rubber sealing sleeve 2 (Fig. 1) on the pipeline 3 (Fig. 1) is made of two half-shells: the upper half-shell 4 (Fig. 1, 2) and the lower half-shell 5 (Fig. .1, 2) made predominantly from fiberglass.

When assembled, the device forms two diameters: large 6 (figure 2) and small 7 (figure 2), which are connected by a conical part (conical section) 8 (figure 2). Small diameter 7, the device 1 is installed on the pipeline 3, and a large diameter 6 on the casing-case 9 (figure 1).

On the inner surface of the end parts of the device, recesses are made in the form of a toroidal cavity 10 (Figs. 1, 2, 3, 4), with a certain radius, which serve as seats for the rubber sealing cord 11 (Figs. 1, 2, 4), the radius of which is the radius of the toroidal cavity 10 for reliable sealing of the space between the outer surface of the sealing cuff 2 of the transition and the inner wall of the device 1 due to the tight laying of the rubber cord 11 (1, 2, 4) with an interference fit in the toroidal cavity 10 of the device 1 (1, 2 )

If it is necessary to supply transition pipelines with protective pipes 12 (Fig. 1) for communication cables, on the lower surface of the upper half-shell 4, a tide 13 (Fig. 2, 3) with a vertical platform 14 (Fig. 2, 3) equipped with one or more holes 15 (FIGS. 2, 3), in which sealing couplings 16 are installed for the passage and sealing of the protective pipes of communication cables 12, (FIG. 1), and in the rubber sleeve 2 for sealing the annular space of the transition, bends 17 are made (FIG. one).

The inventive device 1 reliably protects the rubber cuff 2 from the ingress of a moist environment into the space between the outer surface of the sealing sleeve 2 transition and the inner surface of the device 1 through the seats 10 of the rubber cord 11 (1, 2, 4).

The proposed device operates as follows.

At the end of the installation, the device 1 for protecting the rubber cuff 2 is covered with soil. When filling the trench with mixed soil, stones, cobblestones, frozen soil, lumps of up to 60 kg and more are found, which, hitting the device 1, are absorbed by rubber cords 11 located in the end part of the half-shells 4, 5 in a radial depression in the shape of a toroidal cavity 10 (figure 1, 2, 3, 4), while the end parts of the device, in which the radial recesses are made in the form of a toroidal cavity 10, additionally act as stiffeners to prevent damage from rupture and soil pressure of the device and to protect the rubber th cuff 2 (figure 1).

The device 1 makes it possible for the rubber cuff 2 to deform freely in its space, protected from moisture and soil. When a humid environment enters with the soil, the sealing cuff does not work, because the cuff 2 is tightened with soil, squeezes it, and the process of its tension begins, the clamp fastening does not withstand, and it slides off the casing, opening the annular space for ground water, as a result of corrosion, it destroys the support rings 18 (Fig. 1) and the pipeline , which sinks to the bottom of the casing, which leads to accidents at the transition gas pipeline when moving the pipeline 3 (Fig. 1) at the time of changing seasonal temperatures or changing the temperature of the pumped product and linear extension of the main pipeline.

The invention is simple in design, it provides free installation without falling out of rubber cords 11 from the seats or its dismantling on the main pipeline 3 and on the casing-case 9 (figure 1) of the transition.

The tests of the device showed that reliable sealing is ensured against the ingress of a moist environment into the space between the outer surface of the cuff that seals the annulus of the transition and the inner surface of the device due to the fit of rubber cords over the entire surface to the seats made, for example, in the form of a toroidal cavity, and also to create a stiffener, made as a unit with the device, which prevents the destruction of the seats of the device from impacts by ground When filling the trench of the pipeline passage during the period of its construction and, in the future, reliable operation.

A device for protecting a rubber cuff on a pipeline helps reduce installation time on the track, which is very important in the construction of crossings, as well as increase the life of pipeline crossings under roads and railways, under water barriers and engineering structures, in areas with harsh conditions and permafrost.

Claims (2)

1. A device for the protection of a rubber cuff that seals the annular space at the transitions of trunk pipelines laid under roads, railways, and also under engineering structures, water barriers using a protective casing-case, consisting of upper and lower half-shells, assembled forming two cylindrical and connecting the conical part located between them: a small diameter for installation on the pipeline, and a large diameter on the casing, characterized in that on the inner the surfaces of the end parts of the device are made recesses in the form of a toroidal cavity, which serve as seats for a rubber sealing cord, the radius of which is equal to the radius of the toroidal cavity, while this cavity is made with the possibility of tightly laying the rubber cord with an interference fit to seal the space between the outer surface of the transition seal cuff and the inner wall of the device. 2. The device according to claim 1, characterized in that on the lower surface of the upper half-shell from the side of small diameter an ebb is made with a vertical platform provided with holes in which sealing couplings are installed for the passage and sealing of the protective pipes of communication cables.

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