RU2320914C1 - Polymeric container ballasting device for underground pipeline and spacing frame for underground pipeline polymeric container ballasting device - Google Patents

Abstract

FIELD: pipe laying; pipeline transport.

SUBSTANCE: invention is designed for laying underground pipelines in permafrost ground, swamps and water logged sections. Proposed device contains load-bearing belt for suspending onto pipeline whose end parts form containers made for filling with loose material at ballasting of pipeline and at least two upper flexible belts. Each said container is furnished with spacing frame on outer leg of which end of load-bearing belt and ends of flexible belts are secured, the latter being attached to load-bearing belt in its middle part. To increase ballasting capacity, each container is furnished with pair of end face partitions. Spacing frames are made detachable, longitudinal and cross members of each frame are fixed at assembling by wedging ends of cross members in slots made in legs of longitudinal members of frames by means of elastic deformation of said outer leg.

EFFECT: simplified design of polymeric container ballasting device and its spacing frames.

9 cl, 2 dwg

Description

The invention relates to the construction of pipeline transport and is used to secure the underground trunk pipeline in the projector position in conditions of flooded soils, including in the conditions of the spread of permafrost soils, when laying pipelines in swamps, as well as in a flooded trench.

An analogue is known from the prior art — a weighting agent for laying an underground pipeline, comprising a pair of tanks symmetrically hung on the pipeline and filled with soil, each of which is composed of a rigid frame and a semi-cylindrical container made of flexible material suspended from it (SU 769178 A, 1978).

The known weighting agent is used for group ballasting of pipelines, while the weighting agents in the group are fastened to the end cross-members of the frames. A disadvantage of the known solution is the increased consumption of material on the end walls of the containers, since both adjacent walls of the containers perform one function - they are separators for the backfill soil.

An analogue of the claimed device is a pipeline weighting agent, known from patent RU 2164636 C1, 03/27/2001. The weighting agent contains a pair of containers, each of which is composed of a rigid flat frame and a semi-cylindrical frame made of a flexible material of a container suspended from it.

The tanks are multisectional along the axis of the pipeline, the sections are separated by intermediate transverse walls and frame spacers. The containers of the weighting compound are interconnected by a bond imposed on the pipeline - power belts made of flexible material and fixed by the ends on the external runs of the frames.

A disadvantage of the known solution is the increased consumption of backfill soil. When weighting agents are installed in the group (during continuous ballasting of the pipeline) under the influence of the soil backfill, the containers forming the containers are deformed and wedge-shaped gaps arise between the neighboring weighting agents in which the ballasting soil of the backfill wakes up.

Known pipeline weighting agent containing a V-shaped pair of concrete blocks suspended on the pipeline by means of power belts and resting the lower part on the bottom of the trench. In each of the blocks a blind cavity was opened, open at the top, creating an additional volume filled with backfill soil (see SU 1710913 A1, 02/07/1992).

A disadvantage of the known solution is the possibility of damage to the insulation of the pipeline, increased consumption of concrete and significant costs in the manufacture of weighting compounds and when transporting them to the place of construction of the pipeline.

A well-known pipeline weighting containing containers placed symmetrically relative to the longitudinal axis of the pipeline with rigid rectangular frames - frames (SU 1551930 A1, 03/23/1990). The longitudinal walls of the tanks are suspended from the frames and are made of strips of flexible material.

The weighting compound is equipped with a pair of flexible jumpers forming the walls of the tanks.

A disadvantage of the known solution is the low ballasting ability of the weighting agent, increased metal consumption, the possibility of damage to the insulation of the pipeline.

Closest to the claimed invention in terms of ballasting device (hereinafter referred to as control unit) is a weighting agent known from the prior art (see RU 2220351 C1, 12/27/2003).

The closest analogue to the second object is the spacer frame for the ballasting device (hereinafter referred to as BU) is the spacer frame for the tanks of the pipeline weighting agent, known from document RU 2220351 C1, 12/27/2003.

The known device is a polymer-container ballasting device (PCBU) for the pipeline contains a power belt designed for hanging on it, connecting a pair of containers that are symmetrical with respect to the belt and filled from flexible material and equipped with end walls, an overlay, a pair of flexible power jumpers connected with the outer corners of the frame structure of the containers of rigid flat frames, the inner longitudinal sides of which are supported by the pipeline when the PCBU is hung on it, additional end walls fastened with power jumpers.

The bottom of the containers and the power belt are made of a single panel, which in its middle part is fastened with a cover plate and power jumpers. In the known device, a single panel is located under the inner longitudinal sides of the rigid flat frames, and the overlay is above a single panel and is made multilayer.

Rigid flat spacer frames are made of collapsible tubular elements with the possibility of longitudinal connection of the device frames, and the longitudinal sides of the flat frames are equipped with removable rigid inserts with the possibility of their fixation during group ballasting of the pipeline. The tubular elements of the frame of the flat frames provide ease of assembly, especially with group ballasting of the pipeline. Flexible frames filled with ballasting soil are connected with the frames. The longitudinal edges of the single flexible panels forming the containers are fastened with the longitudinal sides (runs) of the flat rigid frames that are upper relative to the pipeline.

On the upper runs of the frames relative to the pipeline, the edges of the panel forming the bottom of the tanks, as well as the eyes of the power jumpers, are fixed.

When ballasting the pipeline, flat rigid frames are inclined and contact the pipeline with lower longitudinal sides below its horizontal diameter, while the upper longitudinal sides of the frames are not higher than the upper generatrix of the pipeline, which is ensured by the ratio of the lengths of the power belt and external power jumpers. A special case of the use of controllers when laying a pipeline is the implementation of a device for a trench of increased depth, which is typical for laying a pipeline on rough terrain, as well as for icy soils in the North. The known device is material-intensive, does not ensure the full involvement of the material of a single cloth, lining in the work during operational shifts of the pipeline, has considerable laboriousness when carrying out sewing work due to the need to flash multilayer PCBU elements. Since in the conditions of the North the trench has an increased depth relative to the recommended SNiP, the parts of the ballasting device protruding above the upper pipeline generatrix do not affect the increase in the volume of earthwork. In this case, it is advisable to use PKBU with an increased size of tanks for ballasting soil, for which the transverse elements of flat rigid frames perform an increased length. When ballasting, the upper longitudinal elements of the frames are located above the upper generatrix of the pipeline. To make fuller use of the PKU volume, the power jumpers are provided with additional upper end walls that prevent soil from spilling out of the weighting agent. Under these conditions, the flat frames of the weighting compound are in a difficult stress state caused by the significant weight of the ballasting soil and the bursting forces acting from the hydrostatic effect of the backfill soil layer on the side surfaces of the weighting containers.

In addition, the locks connecting the girders and spacers are bonded to the girders with welds. In the nodes of the frames where the locks are located, for pipelines with a diameter of 1200-1420 mm, the total load is 80-100 tons. It is also necessary to take into account operational loads, for example, longitudinal displacements of the pipeline, when the weighting material is pinched in the backfill soil. Thus, the nodes of the connection of the longitudinal and transverse elements of the frame are in a difficult stress state, and when loading the containers of the weighting material with ballasting soil, the one-sided load from the filled first container causes the frames to twist, which creates additional torque acting on the frame locks.

Considering the operating conditions (placement in flooded soils, significant loads on the frame elements), the weld should be tight, without defects, that is, welding should be performed by a highly qualified welder - not lower than the fifth category.

Thus, there is the task of creating a PCBU less material-intensive, the design of the spacer frame of which ensures the manufacturability of its manufacture, eliminates welds, eliminates the mechanical processing of locks, eliminates the leveling of the frame after welding.

The problem solved by the claimed group of inventions is to increase the reliability of the ballasting of the pipeline due to the full involvement of the backfill of the trench in the soil under various operating conditions of the pipeline, reduce the material consumption of PCBUs, reduce the complexity of manufacturing PCBUs by simplifying the design of the spacer frames of the PCBU containers.

This problem is solved in that in a polymer-container ballasting device (PCBU) for an underground pipeline containing a power belt designed for hanging on the pipeline, the end parts of which form containers made with the possibility of filling them with bulk material during pipeline ballasting, a lining with eyes and, at least two upper flexible belts, each of the containers of the control panel is equipped with a spacer frame, the internal runs of each of which are located in the lugs of the lining, and on the external run each The end of the power belt and the ends of the upper flexible belts fastened to the power belt in its middle part, in which each tank is equipped with a pair of end walls, each of which is connected to the part of the power belt forming the tank and the corresponding upper flexible belt, are fixed from the frames. and the spacer frames are collapsible, the longitudinal and transverse elements of each frame are fixed during assembly by jamming the ends of the transverse elements in the grooves made in the runs - p native elements of the framework, by means of elastic deformation of the specified external run.

In a particular case, the PCBU is equipped with additional upper flexible belts connecting the external runs of the frames and fastened to the middle of the power belt.

In addition, each spacer frame is provided with one or more additional spacer elements, and the pad is fastened with a power belt and made in the form of a panel or in the form of two panels / tapes, not less.

Thus, the claimed design of the PCBU is less material-intensive, the complexity of manufacturing the PCBU is reduced due to the simplification of the design of the textile part of the PCBU and the design of the spacer frame of the tanks BU. The technology for placing the control in the pipeline is greatly simplified, due to the simplification of the design of the control unit, in particular the spacer frames and simplified technology for their assembly.

The reliability of pipeline ballasting increases due to a more complete involvement of trench backfill in the soil under various operating conditions of the pipeline.

This problem is also solved by the fact that the PCBU expansion frame for the underground pipeline is made of pipe elements in the form of a flat collapsible closed polygonal frame for each BU container and contains longitudinal and transverse load-bearing elements, respectively, girders and spacer elements connected when assembling the BU in the corners frame, and which is equipped with at least one longer spacer element, which is located in the middle of the frame, while the frame elements are fixed in its corners during assembly by jamming the ends of the transverse elements of the frame in the grooves made in the runs of the frames, by elastic deformation of the specified external run of the frame.

To solve this problem, at least three grooves are made in the wall of each run along the entire thickness of its wall along one generatrix of the run, two of which are made at the ends of the run and are opened from the side of its ends, and one groove is located in the middle of the run, while the width of all the grooves is not less than twice the wall thickness of the spacer elements.

In addition, the ends of the spacer element located in the middle part of the frame are arranged to fit into the run groove and have the form of flat blades due to plastic deformation until the opposite sides of the pipe element forming it touch on a length not less than the inner diameter of the pipe element forming the run.

At the ends of each spacer element located at the edges of the frame, flat sections are formed with the possibility of placing in open grooves of the girders due to plastic deformation until the opposite sides of the tube element forming the spacer element come into contact, while the distance from the cylindrical end of the spacer element to the specified flat section does not exceed the internal diameter forming the run of the tubular element.

In this particular case, the execution of the specified frame is equipped with one or more additional spacer elements.

The design of the spacer frame ensures the manufacturability of its manufacture, eliminates welds, eliminates the mechanical processing of locks, eliminates the straightening of the frame due to the lack of welding work in its manufacture, and also provides the convenience of mounting the control panel in the constrained trench conditions.

The aforementioned design of the PCBU increases its ballasting ability and the reliability of fixing the PCBU on the pipeline.

The invention is illustrated by graphic material, in which Fig. 1 shows the claimed PCBU, front view, in Fig. 2 - connection unit of the spacer frame elements, while the positions respectively indicate:

1 - trench;

2 - pipeline;

3 - soil filling PCBU;

4 - PCBU capacity;

5 - spacer frame;

6 - end wall;

7 - upper flexible belt;

8 - power belt;

9 - overlay;

10 - eye;

11 - longitudinal side (inner) - spacer frame run;

12 - longitudinal side (outer) - spacer frame run;

13 - spacer element;

14 is a flat section of the spacer element.

PCBU contains two placed on both sides of the pipeline 2 laid in the trench 1, soil tanks 3 filled with soil 4. Each of these tanks 4 is equipped with a spacer frame 5, end walls 6, as well as upper flexible belts 7, a power belt 8 intended for hanging to pipeline 1.

The power belt is reinforced by a cover plate 9, the length of which is not less than half the circumference of the outer surface of the pipeline.

The cover plate is connected to the power belt and is made in the form of a panel or in the form of two panels / tapes, at least, and its end parts are provided with eyes 9 in which the internal longitudinal elements of the spacer frames 11 are placed. The cover plate 9 is located on the outer or inner side relative to the runs 11 .

The end parts of the power belt 8 form containers 4, made with the possibility of filling them with bulk material when ballasting the pipeline, for example, backfill soil 3.

On each longitudinal element of the spacer frame - run 12, external to the container 4 and pipe 2, the end of the power belt 8 and the ends of the upper flexible belts 7 are fixed, while the latter are fastened to the power belt 8 in its middle part.

To increase the ballasting capacity, each tank 4 is equipped with a pair of end walls 6, each of which is connected to the power belt 8 forming part 4 and the corresponding upper flexible belt 7.

The spacer frames 5 are collapsible, the longitudinal and transverse elements of each frame are fixed during assembly by jamming the ends of the transverse elements in the grooves made in the runs — the longitudinal elements of the frames, by elastic deformation of the specified external run 12.

Depending on the conditions for securing the pipeline, PCBUs are equipped with additional flexible rods connecting the external runs of the frames and fastened to the middle of the power belt, and each spacer frame is provided with one or more additional spacer elements.

The upper flexible belts 7 are equipped with eyes 9 for accommodating external runs of the spacer frame and are formed by single-layer or folded in several layers ribbons of polymer technical fabric, and the number of upper power belts of each capacity is at least two. The upper flexible belts are sewn to the power belt 8 in its middle part.

The power belt 8 and the containers 4 filled with soil are made in the form of a single panel imposed on the pipeline, equipped with eyes for placement of the external longitudinal sides in them - runs 12 of the spacer frames 4, and each end partition 6 is fastened with a single panel forming the capacity and the corresponding upper power belt .

The bottoms of tanks 4, end walls 6, belts 7, 8 are made of flexible material - polymer technical fabric.

The end walls of the tanks are sewn into the bottoms of the tanks and sewn with the upper flexible belts, which eliminates the rash of the soil backfill from the tanks.

Spacer frames 5 are made collapsible, preferably from metal (round pipes) in the form of a closed polygonal frame and contain load-bearing elements connected in the corners of frame 5 - girders 11, 12 and spacer elements 13.

To fix the frame elements in the wall of each run for the entire thickness of its wall along one generatrix of the run, at least three grooves are made, two of which are made at the ends of the run and are opened from the side of its ends, and one groove is located in the middle of the run, with this width of all the grooves is not less than twice the wall thickness of the spacer elements.

The ends of the longer spacer element located in the middle part of the frame are arranged to fit into the groove of the run and have the form of flat blades due to plastic deformation until the opposite sides of the tube element forming it touch on a length not less than the inner diameter of the tube element forming the run.

At the ends of each spacer element located at the edges of the frame, flat sections 14 are formed with the possibility of placing in the opened grooves of the girders due to plastic deformation until the opposite sides of the tube element forming the spacer element come into contact, while the distance from the cylindrical end of the spacer element to the specified flat section does not exceed the internal the diameter of the tube element forming the run.

When assembling the spacer frames, at least one longer spacer element is located in the middle of the frame, while the frame elements are fixed in its corners during assembly by jamming the ends - flat sections of 14 spacer elements (transverse frame elements) in the grooves made in the frame runs , by elastic deformation of the specified external run of the frame.

Depending on the diameter of the pipeline and the weight of the ballasting soil backfill in PCBU, each spacer frame 5 is equipped with one or more additional runs or spacer elements, preferably located in the middle part of the frame.

When ballasting the pipeline, the frames are arranged obliquely, in contact with the lower longitudinal sides — runs with the pipeline, which is ensured by the estimated length of the power belt between the eyes for the lower runs of the frames and the length of the upper power zones.

A single or composite flexible panel (power belt) forming the containers bends around the inside or outside of the frames and its ends are fastened to the outer longitudinal sides - runs of the spacer frames. The perimeter of each end wall exceeds the corresponding curvilinear perimeter, made up by the edge of the lower power belt, forming containers and the upper flexible belt, which increases the volume of containers filled with soil. End walls are located on the outside of the spacer frames or inside it.

In the upper corners of the frames, the eyes of the upper flexible belts are fixed. If the upper flexible belts are more than two for each tank, then the intermediate eyes of the power belts are placed in cuts made in the upper longitudinal edge of a single panel forming a power belt and the bottom of the containers.

The implementation of the spacer frames collapsible, as well as the implementation of the transverse and longitudinal elements of the frames from tubular elements simplifies their transportation and installation.

The tanks of the control and control system are filled with soil sequentially, preferably symmetrically, which prevents the tanks from skewing relative to the pipeline.

When using a PCBU in group, up to four weighting agents are used in a group to ballast a pipeline, and the number of groups per kilometer of a pipeline is from 40 to 50. A special case of laying a pipeline is to carry out a trench of increased depth, which is typical for icy soils in the North. Since the trench has an increased depth relative to the recommended SNiP, the protruding parts of the ballasting device - PCBUs that are above the upper generatrix of the pipeline - do not affect the increase in the volume of earthwork. In this case, it is advisable to use PKBU with an increased size of tanks for ballasting soil, for which the transverse elements of the stiffening frames perform an increased length. When ballasting, the upper longitudinal elements of the frames of rigidity are located above the upper generatrix of the pipeline by 10-20 cm. In this case, it is permissible to touch the upper runs of the frames of rigidity and the walls of the trench.

The main bearing element - the bottom of the tanks and end walls, being membranes, work only in tension. The resistance to pulling the pipeline out of the soil when exposed to operational loads is the sum of the mass of the soil column (cone or bulging cylinder) above the control panel.

PKBU is technologically advanced in production, with low dead weight and simple assembly, convenient for transportation and installation on the pipeline, and also effective for laying and operating pipelines in various climatic conditions.

The proposed PKBU increases the reliability of the pipeline ballasting and eliminates the possibility of damage to its insulation during construction and operation.

Claims (9)

1. Polymer-container ballasting device (PCBU) for an underground pipeline, comprising a power belt designed for hanging on the pipeline, the end parts of which form containers made with the possibility of filling them with bulk material when ballasting the pipeline, an overlay with lugs and at least two upper flexible belts, with each of the containers provided with a spacer frame, the internal runs of each of which are placed in the lugs of the lining, and the end with silt belt and the ends of the upper flexible belts, while the latter are fastened with a power belt in its middle part, characterized in that to increase the ballasting capacity, each tank is equipped with a pair of end walls, each of which is connected to the capacity forming part of the power belt and the corresponding upper flexible belt , and the spacer frames are collapsible, the longitudinal and transverse elements of each frame are fixed during assembly by jamming the ends of the transverse elements in the grooves made in the runs - about longitudinal elements of the frames, by means of elastic deformation of the specified external run. 2. The device according to claim 1, characterized in that it is equipped with additional upper flexible belts connecting the external runs of the frames and fastened to the middle of the power belt. 3. The device according to claim 1, characterized in that each spacer frame is provided with one or more additional spacer elements. 4. The device according to claim 1, characterized in that the plate is fastened with a power belt and made in the form of a cloth or in the form of two panels / tapes, not less. 5. The spacer frame of the ballasting device (BU) of the underground pipeline, made of pipe elements in the form of a flat collapsible closed polygonal frame for each container BU and containing longitudinal and transverse load-bearing elements, respectively, girders and spacer elements connected when assembling the control unit in the corners of the frame characterized in that it is provided with at least one longer spacer element, which is located in the middle of the frame, while the frame elements are fixed in its corners during assembly by jamming I ends of the transverse frame elements in the grooves made in the frame runs, by elastic deformation of the specified external frame run. 6. The frame according to claim 5, characterized in that at least three grooves are made in the wall of each run along the entire thickness of its wall along one generatrix of the run, two of which are made at the ends of the run and are opened from the side of its ends, and one the groove is located in the middle of the run, while the width of all the grooves is not less than twice the wall thickness of the spacer elements. 7. The frame according to claim 5, characterized in that the ends of the spacer element located in the middle part of the frame are arranged to be placed in the grooves of the said runs and have the form of flat blades due to plastic deformation until the opposite sides of the tube element forming it come into contact on a length not smaller internal diameter forming the run of the tubular element. 8. The frame according to claim 5, characterized in that at the ends of each spacer element located at the edges of the frame with the possibility of placement in the opened grooves of the girders, flat sections are formed due to plastic deformation until the opposite sides of the tube element forming the spacer element come into contact, while the distance from the cylindrical the end of the spacer element to the specified flat section does not exceed the value of the inner diameter of the pipe element forming the run. 9. The frame according to claim 5, characterized in that it is equipped with one or more additional spacer elements.