RU2670643C9 - Device for protecting joint of coated pipelines - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to the field of construction and repair of pipelines, namely to the joints of pipelines with a protective coating, laid on the bottom of the reservoir or wetland. Device for protecting the joint of the coated pipelines includes the ends of the conductive tubes with a protective coating, connected by a welded joint and fixed to them, paired semirings, connected together by fasteners through the eyes from one end and the hinge from the opposite. Paired semirings are divided into modules of paired semirings, in which the half rings are connected together by fasteners through the eyes from one end and with a removable hinge and fasteners located in the lugs, which have the form of a groove from the opposite end. Pair of semi-rings module placed above the weld seam has a width exceeding the weld zone and takes into account the tolerances for the linear dimensions of the protective coating of the conducting pipes.

EFFECT: increased service life of pipelines with ballast coating due to reduced loads on the butt joint and its hardening.

7 cl, 11 dwg

Description

The present invention relates to the field of construction and repair of pipelines, namely, to the joints of pipelines with ballast coating, laid on the bottom of a reservoir or wetland.

Known annular concrete weighting agent (see patent for utility model No. 90521, publ. 10.11 2010), containing two sections connected with a gap between each other and adjustable along the length of the coupling elements in the shape of half rings in their cross section. The inner surface of the clamping elements facing the pipe has the shape of a cylindrical surface, and the outer convex surface of each section has an arcuate curve in longitudinal section connecting the end faces of the weighting agent. To accommodate the coupling elements, niches with coaxial channels open from the outer surface of at least one section are made, in which the coupling elements are preferably placed flush with the outer surface of the section.

The disadvantage of this annular concrete pipeline weighting compound is the complexity of its installation, as well as logistical difficulties determined by the size and weight of the weighting agent, when implementing this utility model in large diameter conducting pipes, more than 1000 mm.

Known annular concrete pipeline weighting agent (see patent for utility model No. 157233, publ. 11/27/2015) having two interconnected sections in the shape of half rings, coupling elements connecting sections and mounting elements. The sections are made in the form of hard shells, for example stainless steel, while they have a hatch for filling sections through it with concrete mix.

The disadvantages of this annular concrete pipeline weighting compound are: the complexity of its installation with sufficiently large conductive pipes (more than 1000 mm), when the weight of the weighting compound can exceed half a ton, as well as logistical problems determined by size and weight.

A device for ballasting a pipe joint (see Utility Model Patent No. 62443, published April 10, 2007) consisting of two concrete half rings having longitudinal steel ends that form a concrete ring after installation and fixing them above the joint of the conducting pipes. Each ring has reinforcement made in the form of a steel mesh half-ring welded to longitudinal steel ends from long products. A tape of thermoplastic material is glued to the outer surface of the half rings.

The disadvantages of this device for ballasting the joint of the pipeline should include a significant weight of the half rings. So, for example, with a diameter of the supply pipes of 1000 mm, the weight of two half rings will be about 400 kg. This greatly complicates the operation of the installation of half rings and logistics, determined by the need to transport massive and bulky weighting materials to the place of installation over several hundred kilometers. And also makes it almost impossible to implement it in traveling conditions on the highway.

In addition, the use of the hinge, its installation on half rings requires great accuracy and endurance of the parallelism of the ends of the half rings. And with their significant mass, this is a rather labor-intensive operation.

The technical result of the proposed technical solution is the approximation of the strength characteristics of the protective coating of the junction of the conductive pipes to the characteristics of the conductive pipe, as well as a decrease in the load on the butt joint and its hardening, and as a result, an increase in the resistance of the pipeline to natural and technogenic factors.

The technical result of the proposed technical solution is also to reduce the influence of the ellipse of the conducting pipes and the inner surface of paired half rings from section to section along the length of the joint, due to the crushing of paired half rings into modules, which ultimately provides a more accurate fit to the surface of the conducting pipe. This will increase the service life of the joints of the joints of conductive tubes with a ballast coating and bring its strength characteristics closer to the characteristics of a conductive tube with a ballast coating.

In addition, the technical result of the claimed solution is to reduce logistics and installation costs.

Also, the technical result of the claimed solution should include, facilitation of the installation of the device for protecting the joint of concrete pipes using a removable joint.

The technical result is achieved by the fact that in the device for protecting the joint of the concreted pipelines, including the ends of the conductive pipes with a protective coating, connected by a welded seam and fixed to them, paired half rings interconnected by fasteners through the eyes from one end and a hinge from the opposite, the paired half rings are divided on modules of paired half rings, in which the half rings are interconnected by fasteners through the eyes from one end and a removable hinge and fasteners placed in the eyes having the shape of a groove with prot and the opposite end. The paired half-rings module, placed above the weld, has a width exceeding the weld zone and takes into account the tolerances on the linear dimensions of the protective coating of conductive pipes.

The removable hinge of the pair of half rings module is made in the form of a U-shaped bracket, each end of which has a circular cross section, is equipped with holes for the load gripping device and position locks of the pair of half rings module.

Preferably, the eye of the paired half-ring module was provided with an opening for fasteners placed on the side of the removable hinge.

Preferably, the half rings of the paired half rings module are provided with an internal reinforcing cage connected to the steel ends of the eyes.

Preferably, the half rings of the paired half rings module are provided with an internal stamped frame connected to the steel ends of the eyes.

Preferably, the module of paired half rings was made of concrete mix, including with nanomodified additives.

In FIG. 1 shows a section of a device.

In FIG. 2 is a section AA in FIG. one.

In FIG. 3 - node 1 of FIG. 2.

In FIG. 4 is a linear tolerance diagram for a protective coating of conductive pipes.

In FIG. 5 - rotation (disclosure) of the half rings of the module of the pair of half rings before fixing at the junction.

In FIG. 6 - node 2 in FIG. 5.

In FIG. 7 - module paired half rings with pre-strapped lower ends.

In FIG. 8 is a section BB in FIG. 7.

In FIG. 9 - the position of the ends of the module paired half rings after removing the clamps from the U-shaped bracket.

In FIG. 10 is a diagram of the loads on the pipeline.

In FIG. 11 is a diagram of the loads on the pipeline with the proposed technical solution to the problem placed at the junction of the pipeline.

The junction node (Fig. 1) consists of two ends of the conducting pipes 1 with a protective coating 2 connected by a weld 3. The outer surface of the joint of the conducting pipes 1 is covered with thermoplastic material 4. The modules of paired half rings 5 and 6 are fixed (strapped) on the conducting pipes 1 s using fasteners 7 and 8 through their eyes 9 and 10 (Fig. 2).

The application of the protective coating 2, which is carried out at the factory, on the conductive pipes 1 (Fig. 4) is tied to the tolerance - Δ on the linear size of the protective coating - A (distance from the end of the conductive pipe 1 to the protective coating 2), which varies depending on the diameter of the conductive pipes over a wide range (Δ = 5-12 mm). Therefore, the width - In the module of paired half rings 5 is selected on the basis that it should exceed the width of the zone of the weld, plus a tolerance - Δ, on the linear dimensions of the protective coating 2 of the conducting pipes 1. In this regard, the dimensions (width - B) of the module of paired half rings 5 differs from the sizes of the remaining modules of paired half rings 6.

The removable hinge (Fig. 6) of the modules of paired half rings 5 or 6 is made in the form of a U-shaped bracket 11 of circular cross section and placed in the groove 12 of the eyes 9. The ends 13 (Fig. 6 and Fig. 9) of the U-shaped bracket 11 are provided with holes 14 and 15, in which load gripping devices and latches 16 of the module position of the pair of half rings 5 or 6 are inserted.

The pulling (fastening) of the modules of paired half rings 5 and 6 at the junction of the conducting pipes 1 can also be carried out through an opening 17 located next to the eye 9 (Fig. 8).

The modules of paired half rings 5 and 6 are equipped with an internal reinforcing cage 18 (Fig. 2) connected with the steel ends of the eyes 9 and 10.

The modules of paired half rings 5 and 6 can be equipped with an internal stamped frame (not shown) connected with the steel ends of the eyes 9 and 10.

Modules of paired half rings 5 and 6 can be made, for example, of concrete mix with nanomodified additives.

The device operates as follows.

On the joint node (Fig. 1) of two conductive pipes 1 connected by a weld seam 3, a thermoplastic material 4 is applied, which is then heated, as a result of which it fits tightly on the outer surface of the joint. To carry out the operation of fixing the proposed technical solution to the junction of the conductive pipes 1, any of the extreme modules of paired half rings 6 is taken and hung on the slings using a U-shaped bracket 11, in which for this purpose load-gripping devices are inserted into the holes 14 (Fig. 6), for example Crosby staples. At the same time, the ends 19 and 20 of the module of paired half rings 6 abut against the latches 16. The distance between the latches 16 is chosen so that when turning the half rings the ends 19 and 20 of the module of paired half rings 6 do not interact with each other (Fig. 6). The interaction (mutual abutment) of the ends 19 and 20 leads to an increase in the torque required for their rotation.

Further, each half-ring of the module of paired half-rings 6 (Fig. 5) hung over the conductive pipes 1 is stretched in different directions using slings and Crosby brackets (not shown) fixed in the eyes 10. Moreover, each half-ring of the module of paired half-rings 6 rotates around its the axis of the latches 16. This is possible due to the groove 12 (Fig. 5) of the eyes 9 of the module of paired half rings 6. With the semi-rings extended apart in different directions, the module of paired half rings 6 is lowered to the joint, and the tensile force on the slings necessary for their rotation is reset. At this moment, the reverse rings of the half rings of the module of the pair of half rings 6 around their axis - the latches 16. As a result, the lower side of the module of the pair of half rings 6 closes and is pre-tightened with fasteners 8, for example, a bolt connection (Fig. 7).

Then, both latches 16 are sequentially removed from the holes 15 of the U-shaped bracket 11, as a result of which the eyes 9 of the module of paired half rings 6 roll along it to the center and are pressed against each other by the ends 19 and 20. After that, the half rings of the module of paired half rings 6 are pulled together using fasteners 7 under the U-shaped bracket 11 (Fig. 9). The groove 12 of the eyes 9 is made so that when an U-shaped bracket 11 is inserted, an opening (residue) of the groove 12 is formed below it to accommodate the fasteners 7. It is also possible to tighten the pair of half rings 6 using the hole 17 located next to the eye 9 (Fig. 8).

After pulling together the upper and lower sides of the module of paired half rings 6, the slings are removed and load-lifting devices (for example, Crosby brackets) are removed from the holes 14 of the U-shaped bracket 11, and then the U-shaped bracket 11 is also removed from the eyes 9. module of paired semirings 6 ends.

Next, the removable hinge is fixed on the module of paired half rings 5, which is located above the weld seam 3, and all operations for its fastening are repeated by analogy with the previous one. This module of paired half rings 5 has a larger size (width), since its task is to overlap not only the weld zone, but "extinguish" the tolerance on the linear dimensions of the protective coating 2 of the conductive pipes 1.

The same operations are carried out with the third module of paired half rings 6.

In FIG. 9 shows the distribution of load on the pipeline. It can be seen that the maximum load falls on the junction. In FIG. 10 shows the uniformity of the load distribution along the pipeline when using modules of paired half rings 4. The number of paired half rings placed at the junction of modules depends on the diameter of the conducting pipes. The larger it is, the more modules will be required. This is determined on the basis of their mass, dimensions and elements of logistics. In this case, it is desirable to have an odd number of modules of paired half rings, since in this case the central one will cover (clamp) directly the weld 2 of the joint (see Fig. 1).

The present invention can be applied in route conditions for direct laying of the pipeline, since the modules of paired half rings 5 and 6 have less weight and therefore the need for heavy lifting equipment is eliminated, and the installation operation is facilitated.

In addition, the pipeline, using the proposed technical solution, allows us to fulfill the task of increasing the service life of the pipeline and increasing the resistance of the pipeline to natural, man-made or terrorist influences, and also reduces the cost of its operation.

Claims (7)

1. A device for protecting the joint of concrete pipes, including the ends of the conductive pipes with a protective coating, connected by a weld and fixed to them, paired half rings, interconnected by fasteners through the eyes from one end and a hinge from the opposite, characterized in that the paired half rings are divided into modules of paired half rings, in which the half rings are interconnected by fasteners through the eyes from one end and a removable hinge and fasteners placed in the eyes, having the shape of a groove from the opposite end, What is more, the module of paired half rings placed above the weld has a width exceeding the weld zone and takes into account the tolerances on the linear dimensions of the protective coating of the conductive pipes. 2. The device according to claim 1, characterized in that the removable hinge of the module of paired half rings is made in the form of a U-shaped bracket of circular cross-section, each end of which is provided with holes for the load gripping device and position locks of the module of paired half rings. 3. The device according to claim 1, characterized in that the eye of the module of the paired half rings is provided with an opening for fasteners located on the side of the removable hinge. 4. The device according to claim 1, characterized in that the modules of the paired half rings are provided with an internal reinforcing cage connected with the steel ends of the eyes. 5. The device according to claim 1, characterized in that the modules of the paired half rings are provided with an internal stamped frame connected with the steel ends of the eyes. 6. The device according to p. 1, characterized in that the modules of paired half rings are made, for example, of concrete mixture. 7. The device according to p. 6, characterized in that the modules of the paired half rings are made of concrete mix with nanomodified additives.

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