RU216684U1 - ABOVE GROUND PIPELINE SUPPORT - Google Patents

Abstract

The utility model relates to the construction and operation of main pipelines and can be used as an effective support structure for elevated main pipelines in conditions complicated by seasonally swollen soils. The technical result is to increase the reliability of the structure of the support of the above-ground main pipeline. The design of the support of the aboveground main pipeline in conditions complicated by seasonally swelling soils, due to the installation of retainer plates with plate fastening, makes it possible to reduce the SSS of the pipeline and makes it possible to inspect for the presence of defects caused by the consequence of the cryogenic heaving process after the winter period, and also allows processing the base plate and damper with anti-heaving solutions and lubricants, which can significantly increase the service life of the support of the above-ground main pipeline.

Description

The utility model relates to the construction and operation of main pipelines and can be used as an effective support structure for elevated main pipelines in conditions complicated by seasonally swollen soils.

A pipeline support is known (RF patent No. 2479779, publ. 02.08.2010), containing a hollow base fixed in the ground, a rack for supporting the pipeline, placed in the base cavity with the possibility of reciprocating movement, support-swivel units installed in the upper part of the rack and at the bottom of the base. On the outer surface of the rack between the flanges of the rack and the base, two helical compression springs with different stiffness and opposite winding direction are concentrically placed.

The disadvantage of this device is the presence of one hollow base, which leads to deviation and fall of the support when exposed to the forces of frost heaving of the soil.

A pipeline support is known (RF patent No. 2056570, publ. 03/20/1996), containing a reinforced concrete lodgement, consisting of a lower and upper parts facing one another with horizontal planes, between which springs are installed, configured to compress by an amount equal to the height of the soil lift during frost heaving. The pipe rests on the top of the block in a cylindrical bed. Anchors fixed in the ground and the upper part of the block are missing from the top of the pipe.

The disadvantages of this support include the location of the lower part of the support, since it is pinched in the ground and the springs rest only on the lower part of the support, which leads to an unstable position of the support.

A pipeline support is known (RF patent No. 2124668, publ. 01/10/1999), containing a foundation pile, on which the pipeline lodgement is movably fixed through elastic elements - springs. The support is equipped with a measuring bar with a sight to register the displacements of the pile as a result of the impact of the forces of frost heaving of the soil on it. Taking into account the movements of the piles, they regulate the settlement of the support springs to reduce stresses in the pipeline.

The disadvantages of this support include the number of only one platform and one fixed pile to the platform, there is only one type of springs, vertical and horizontal loads from the displacement of the pile are transferred to the lodgement only through the support platform, this leads to deformation of the spring beyond the limits of elasticity, acquiring permanent deformation , and as a result of actions that occur during seasonal swelling of the soil, the stress-strain state (SSS) increases.

A movable pipeline support is known (D.A. Korshunova. Movable support parts of pipelines and other structures. Kiev: Higher School, 1976. 143 S.), containing springs fixed on the bases of the support, the lodgment of which is located on the grillage table. The springs connect the grillage table and rest against the base plate. Compensation for the resulting movements between the support and the pipeline is carried out by a damper system.

The disadvantages are that the base plate is installed strictly above the ground and the shape of the base plate does not allow to maintain stability when exposed to frost heaving forces that flow unevenly.

The closest to the claimed technical solution is the support of the elevated main pipeline (RF patent No. 2781733, publ. 10/17/2022), containing with the possibility of removing at least two half-clamps, which are made in the form of flat half-rings, the damper consists of an external spring, which is made in the form cylinder, and inside it there is an internal spring in the form of a cone, the diameter of which increases in the lower part, the lower part of the base plate is made in the form of a sharp edge, while holes are made in it, where screw piles are installed, which pass through the damper and abut against the table - grillage.

The disadvantages of this support include the presence of a base plate in the ground all year round, since the reinforced concrete base plate heats up in summer due to solar radiation, this will lead to greater thawing of the soil in summer, which occurs during seasonal thawing of the soil, which will increase the volume of thawed soil and will increase the unevenness of frost heaving of the soil, which will lead to incorrect operation of the support structure and a decrease in the efficiency of cutting the soil, and as a result of actions that occur during seasonal heaving of the soil, the support will not fully cope with its task and the risk of accidents on the main pipeline will increase when exposed to frost heaving forces.

The technical result is to increase the reliability of the structure of the support of the above-ground main pipeline.

The technical result is achieved by the fact that on the damper springs, clamps are installed with the possibility of removing the plate, consisting of elongated plates that are installed parallel to each other, and shortened connecting plates are perpendicularly installed on them, while the plates are made in the form of a rectangle, at the ends of which holes are made, in which the fastening of the plates is installed with the possibility of removal, the fixing plates are fixed to the damper from the upper and lower sides, while the screw pile is located inside the plates and does not come into contact with its walls, the fastening of the plate consists of fixing elements, in the center of which holes are made, into which a stopper is installed with the possibility of rotation, made of two parts in the form of a cylinder, on the outer surfaces of which a thread is applied; on the inner surfaces of the stopper, a fastening spring is rigidly fixed; a position lock is installed on the outside of the stopper with the possibility of moving along its axis and fixing the spring inside it other fastening, which is made in the form of a hollow cylinder, on the inner surface of which a thread is applied.

The device is illustrated by the following figures:

fig. 1 - support device with a compressed damper, front view;

fig. 2 - support device with an expanded damper, front view;

fig. 3 - fastening for the plate is compressed;

fig. 4 - mount for the plate is unclenched;

fig. 5 - damper with metal plates top view;

fig. 6 - damper compressed by metal plates,

where 1 - pipeline;

2 - lodgment;

3 - half collar;

4 - mount;

5 - grillage table;

6 - base plate;

7 - washer;

8 - damper;

9 - screw pile;

10 - external spring;

11 - internal spring;

12 - plate retainer;

13 - mounting plates;

14 - fixing element;

15 - fastening spring;

16 - stopper;

17 - position lock;

18 - trench.

The support of the elevated main pipeline 1 consists of a lodgement 2 (Fig. 1) made in the form of a half-cylinder, from above it is fixed with the possibility of removing at least two half-clamps 3, which are made in the form of flat half-rings. Half-collars 3 and are fixed with the cradle 2 by fastening 4. The width of the half-collar 3 depends on the diameter of the pipeline 1 and the design load. The grillage table 5 (Fig. 2) is made in the form of a rectangle, the lodgement 2 is rigidly fixed on it. The damper 8 is installed between the grillage table 5 and the base plate 6. element washer 7, and the upper end is fixed with the possibility of selecting spring coils in height in the grillage table 5. Damper 8 consists of an external spring 10, which is made in the form of a cylinder, and inside it is installed an internal spring 11 in the form of a cone, the diameter of which increases in lower part. On the springs of the damper 8, clamps 12 are installed with the possibility of removing the plate. The clamp plate 12 (Fig. 5) consists of two elongated plates that are installed parallel to each other and two shortened connecting plates that are installed perpendicular to the elongated plates. Elongated plates and shortened connecting plates are made in the form of a rectangle, for example, from metal. At the ends of the elongated plates and shortened connecting plates, holes are made into which the fastening of the plates 13 is installed with the possibility of removal. 8 from the bottom side, while the screw pile 9 was located inside the retainer plate 12 and does not come into contact with its walls. The fastening of the plate 13 (Fig. 3, 4) consists of fixing elements 14, in the center of which holes are made, in which the stopper 16 is installed with the possibility of rotation. The stopper 16 consists of two parts, which are made in the form of a cylinder, and a thread is made on their surface . On the inner surfaces of the stopper 16 is rigidly fixed by the fastening spring 15. The stopper 16 has a position lock 17, made in the form of a hollow cylinder with the ability to move along the axis of the stopper 16 and with the possibility of fixing two parts of the stopper 16. The lower part of the base plate 6 is made in the form of a sharp edge , which is installed in the trench 18. Screw piles 9 are made in the form of a cylinder, on the inner surface of which there is a thread, and the lower part is in the form of a cone. Holes are made in the base plate 6, where the screw piles 9 are installed, through the damper 8 and abut against the grillage table.

With the geometrical parameters of the springs, where: the average diameter of the spring D = 150 mm; wire diameter d = 13 mm; spring index c = D/d = 7.5; number of working turns i = 4; the total number of turns n=7, it is proposed to tighten the metal plates clamps 12 with the fastening of the plates 13 and compress the springs to a distance based on the depth of the release of the base plate into the trench, for example: at a depth of release of the base plate into the trench at a distance l = 0.3 m, it is proposed to raise the base plate at a distance s = l = 0.3 m in summer.

Support elevated main pipeline works as follows. Screw piles 9 are installed in the frozen soil, which, when the soil is heaving, rise up, while the damper 8 begins to compress by the amount of elevation of the screw pile 9, when the soil thaws, the screw pile 9 returns to its original position and the damper 8 expands. In the process of soil heaving, the base plate 6 is displaced and, due to the sharp edge, cuts the soil in the opposite direction from the height of frost heaving of the soil, and in the process of thawing the soil, the base plate is raised by the calculated distance depending on the depth of soil freezing. To raise the base plate 6, tighten the locking elements 14 (Fig. 1, 3, 6) on the plates of the clamps 12, the position lock 17 is set to the central position on the stopper 16, the fastening springs 15 are compressed inside the position lock 17. After raising the base plate, check the plate for defects. Compressed damper 8 and plate retainers 12 with fastening plates 13 are treated with anti-corrosion EFELE MG-214 lubricants or Molykote PTFE-N-UV for protection against oxidation when interacting with oxygen and protection against moisture during the rainy and dew season, settling on the outer spring 10 and the inner spring 11. In winter, before lowering the base plate 6 into the trench 17, if necessary, cover the reinforced concrete base plate 6 with several layers of plastic lubricants, for example, BAM-3 and BAM-4, and silicone enamels, for example, KO-174, KO-1164. After checking the base plate 6 for defects, the excavation of the trench 18 is leveled, if the integrity of the excavation of the trench 18 was violated during the summer period due to thawing. lower position, the unclenched mounting springs 15 can move freely depending on the position of the damper springs 8.

The design of the support of the aboveground main pipeline in conditions complicated by seasonally swelling soils, due to the installation of retainer plates with plate fastening, makes it possible to reduce the SSS of the pipeline and makes it possible to inspect for the presence of defects caused by the consequence of the cryogenic heaving process after the winter period, and also allows processing the base plate and damper with anti-heaving solutions and lubricants, which can significantly increase the service life of the support of the above-ground main pipeline.

Claims (1)

The support of the elevated main pipeline, including springs fixed on the bases of the support, the cradle of which is installed on the grillage table, where the springs connect the grillage table and abut against the base plate, are fixed to the cradle from above with the possibility of removing at least two half-clamps, which are made in the form of flat half rings, the damper consists of an external spring, which is made in the form of a cylinder, and inside it is installed an internal spring in the form of a cone, the diameter of which increases in the lower part, the lower part of the base plate is made in the form of a sharp edge, while holes are made in it, where screw piles that pass through the damper and abut against the grillage table, characterized in that the springs of the damper are mounted with the possibility of removing the plate-retainers, consisting of elongated plates that are installed parallel to each other, and shortened connecting plates are installed perpendicular to them, with this plate is made in the form of a rectangle a, at the ends of which holes are made, in which the fastening of the plates is installed with the possibility of removal, the fixing plates are fixed to the damper from the upper and lower sides, while the screw pile is located inside the plates and does not come into contact with its walls, the fastening of the plate consists of fixing elements, in the center of which holes are made, in which a stopper is installed with the possibility of rotation, made of two parts in the form of a cylinder, on the outer surfaces of which a thread is applied, a fastening spring is rigidly fixed on the inner surfaces of the stopper, a position lock is installed on the outside of the stopper with the ability to move along its axis and fixing the fastening spring inside it, which is made in the form of a hollow cylinder, on the inner surface of which a thread is applied.

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