RU182117U1 - DEVICE FOR COMPENSATION OF STRESSES AND PROTECTION OF JOINTS OF PIPELINES WITH CONCRETE COVERING FROM LOADS AND INFLUENCES - Google Patents

Abstract

The utility model relates to the field of construction and repair of pipelines, namely to the joints of pipelines with a protective concrete coating, laid at the bottom of a reservoir, wetlands and in earthquake-prone areas, as well as cases of increased requirements for pipeline protection.

A device for compensating stresses and protecting joints of pipelines with a concrete coating from loads and impacts includes paired half rings interconnected by fasteners through lugs from one end and a hinge from the opposite. 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.

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 equipped with holes for the load gripping device and the position lock of the module of paired half rings.

Modules of paired half rings are made of concrete mix with nanomodified additives and equipped with an internal reinforcing cage connected with the steel ends of the eyes.

The technical result of the proposed technical solution is to increase the service life of pipelines with a protective concrete coating by reducing the load on the butt joint and its hardening. 13 s.p. f-ly, 11 ill.

Description

The proposed technical solution relates to the field of construction and repair of pipelines, namely, to the joints of pipelines with ballast coating, laid at the bottom of a reservoir, wetlands and in earthquake-prone areas, as well as cases of increased requirements for the protection of the pipeline.

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.

During the installation of the pipeline in accordance with the design decisions and the selected production methods, the pipeline undergoes elastic bending. At the junction of the pipeline, the bending force has a maximum value, which ultimately can lead to deformation of the pipeline at the junction.

The above-described device for ballasting the joint of the pipeline solves this problem, but at the same time there are problems with the weight of the half rings, their dimensions, and as a result, the logistic tasks associated with the delivery of massive and bulky half rings to the installation site, their unloading, etc.

So, for example, with a diameter of the supply pipes of 1000 mm, the weight of two half rings will be about 400 kg. It also significantly complicates the implementation of its installation work in field 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 joint of the conductive pipes to the characteristics of the concrete pipe, as well as reducing the load on the butt joint and its hardening.

The result of the technical result is to increase the stability of the pipeline to natural and man-made factors.

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 in that in a device for compensating stresses and protecting joints of pipelines with a concrete coating from loads and influences, including paired half rings filling the space of the butt joint of pipes with concrete coating and connected to each other by fasteners through lugs from one end and a hinge from the opposite, 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 are placed and the lugs having a groove shape with opposite end.

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 reinforcing cage is made of steel or composite reinforcement.

Preferably, the reinforcing cage is made of mesh mesh, for example, metal, polymer, or composite.

It is preferable that the modules of paired half rings are made of concrete mix, including with nanomodified additives.

Preferably, the modules of the paired half rings were made of fiber-reinforced concrete.

Preferably, the paired half-ring modules are made of fiber-reinforced concrete with nanomodified additives.

Preferably, the modules of the paired half rings were made, for example, of a composite composition.

Preferably, an anti-corrosion coating is applied to the outer surface of the pipe.

It is preferable 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 an opening for the load gripping device and a groove interacting with the position lock of the module of paired half rings.

Preferably, the groove of the U-shaped bracket and the position lock of the module of the pair of half rings are made in the form of a wedge self-braking pair.

Preferably, the position lock of the paired half-ring module is provided with an opening in the form of a groove.

In FIG. 1 is a sectional view of a device for compensating stresses and protecting joints of concrete coated pipelines from loads and impacts.

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

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

In FIG. 4 - shows the opening of the half rings before fixing at the junction. In FIG. 5 - node 2 in FIG. four.

In FIG. 6 - shows a module of paired half rings with previously strapped lower ends.

In FIG. 7 - node 3 in FIG. 6

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

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

In FIG. 10 - presents 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 node of the pipe joint (Fig. 1) consists of two ends of pipes 1 with anticorrosive 2 and concrete 3 coatings connected by a weld 4. The outer surface of the pipe joint 1 is covered with thermoplastic material 5. Modules of paired half rings 6 are fixed (tightened) on the pipes for 1 s using fasteners 7 and 8 through their eyes 9 and 10 (Fig. 2).

The modules of paired half rings 6 can be equipped with an internal reinforcing cage 11 (Fig. 2, Fig. 3) connected with the steel ends of the eyes 9 and 10.

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

The removable hinge of the module of paired half rings 6, is made in the form of a U-shaped bracket 12 having in its cross section a circle and placed in the groove 13 of the eyes 9 (Fig. 4). The ends 14, of the U-shaped bracket 12, are provided with holes 15 into which load gripping devices are inserted. In the grooves 16 made in the U-shaped bracket 12, the latch 17 of the module position of the paired half rings is inserted 6. The latch 17 of the module position of the pair of half rings 6 and the groove 16 of the U-bracket 12 are made in the form of a self-braking wedge. This is achieved by a small angle of the wedge a component of 3-5 degrees (Fig. 8).

The latch 17 of the module position of the paired half rings 6 is provided with an opening 18 in the form of a groove intended for the convenience of extracting the latch 17 from the grooves 16, the U-shaped bracket 12.

Modules of paired half rings 6 can be made, for example, from a concrete mixture with nanomodified additives or fiber concrete including nanomodified additives.

Modules of paired half rings can also be made of composite composition, and the reinforcing cage 11 can be replaced by a mesh, for example, metal, polymer, or composite composition.

The device operates as follows.

On the joint node (Fig. 1) consisting of two pipes 1 connected by a weld 4, a thermoplastic material 5 is applied, which is then heated, as a result of which it fits tightly on the outer surface of the joint. Next, a module of paired half rings 6 is taken and hung on the slings using a U-shaped bracket 12, in which for this purpose load-gripping devices, for example, Crosby brackets, are inserted into the holes 15 (Fig. 5). In this case, the ends 19 and 20 of the module of paired half rings 6 abut against the latch 17.

After that, each half-ring of the module of the pair of half-rings 6, hung over the pipes 1, is stretched in different directions with the help of slings and Crosby brackets (not shown) fixed in the eyes 10 (Fig. 4). As a result, they rotate around their axis - the latch 17. This is possible due to the groove 13 of the lugs 9 of the module of paired half rings 6. With the half rings 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 rotation of the semirings of the module of the paired semirings 6 about its axis occurs. As a result, the lower side of the module of paired half rings 6 is closed, and it is pre-tightened with fasteners 8, for example, a bolted connection (Fig. 6).

Then the latch 17 is pulled out of the grooves 16 of the U-shaped bracket 12, use for this purpose the hole 18 in the form of a groove. To prevent the likelihood of popping the latch 17 from the grooves 16, they are made in the form of a wedge self-braking pair. This is achieved by a small wedge angle α of 3-5 degrees (Fig. 7 and Fig. 8).

As a result of pulling the latch 17 out of the grooves 16, the eyes 9 of the module of the paired half rings 6 slide along the U-bracket 12 to the center and are pressed against each other by the ends 19 and 20. (Fig. 9). That is, there is an exact docking of the ends 19 and 20, which ultimately reduces the labor costs and installation time of the modules of paired half rings 6. After that, the half rings of the module of paired half rings 6 are pulled together using fasteners 7. The eye 9 is made so that when U- shaped bracket 12 under it there was a place for mounting fixture 7, for example a bolted connection.

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 15, the U-shaped bracket 12, and then the U-shaped bracket 12 is removed from the eyes 9. fixing the first module of the paired half rings 6 ends.

Further, the removable hinge is fixed on the second module of the paired half rings 6, and all operations on its fastening are repeated by analogy with the previous one. The same operations are carried out with the third module of paired half rings 6.

The number of paired half rings placed at the junction of modules depends on the diameter of the 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 4 of the joint (see Fig. 1).

In FIG. 10 shows the distribution of load on the pipeline. It can be seen that the maximum load falls on the junction. In FIG. 11 - shows the uniformity of the load distribution along the pipeline when using modules of paired half rings.

Using a removable hinge allows you to reduce the time for the installation of modules of paired half rings, as well as labor costs in connection with the exact docking of their upper end.

The proposed technical solution can be applied in route conditions for direct laying of the pipeline, since the modules of paired half rings 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 installation and operation.

Claims (14)

1. A device for compensating stresses and protecting joints of pipelines with a concrete coating from loads and impacts, including paired half rings filling the space for the butt connection of pipes with concrete coating and interconnected by fasteners through lugs from one end and a hinge from the opposite, characterized in that paired the 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 mi the shape of the groove from the opposite end. 2. 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. 3. The device according to claim 1, characterized in that the modules of the paired half rings are provided with an internal stamped frame connected to the steel ends of the eyes. 4. The device according to p. 2, characterized in that the reinforcing cage is made of steel or composite reinforcement. 5. The device according to p. 2, characterized in that the reinforcing cage is made of mesh, for example, metal, polymer or composite. 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. 8. The device according to claim 1, characterized in that the modules of paired half rings are made of fiber-reinforced concrete. 9 The device according to p. 8, characterized in that the modules of the paired half rings are made of fiber-reinforced concrete with nano-modified additives. 10. The device according to claim 1, characterized in that the modules of the paired half rings are made, for example, of a composite composition. 11. The device according to claim 1, characterized in that an anticorrosion coating is applied to the outer surface of the pipe. 12. 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 an opening for the load gripping device and a groove interacting with the position lock of the module of paired half rings. 13. The device according to p. 12, characterized in that the groove of the U-shaped bracket and the position lock module of the paired half rings are made in the form of a wedge self-braking pair. 14. The device according to p. 12, characterized in that the position lock module of the paired half rings is provided with a hole in the form of a groove.

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