RU2244865C2 - Method and device for stripping pipeline - Google Patents

Abstract

FIELD: laying or reclaiming pipes.

SUBSTANCE: method includes removing upper layer of spoil, developing side trench with disposal the spoil by damping. The development of side trenches is performed step-by-step. The stripped trench is provided with stripping machine, the side trench are deepened by the working members of the stripping machine below the bottom of the pipeline and pipeline is continuously stripped by trenching machine and stripping machine when it moves forward. The stripping machine has frame with running carriages, clamps, supporting members and mechanism for forward motion.

EFFECT: enhanced efficiency.

3 cl, 4 dwg

Description

The invention relates to the field of repair of the linear part of the main pipelines, and in particular to methods and equipment for opening oil (gas) pipelines in route conditions

From the description of the patent of the Russian Federation No. 2133320 "Method for the production of stripping operations", IPC F 16 L 1/026 publ. Bull. from No. 5, 2001, a method for opening an oil pipeline is known, in which the top layer of soil is uncovered by an excavator, and the development of rocky or frozen soils is carried out using an explosive generator (VGU) using liquid explosive mixtures. The described method is intended for opening oil pipelines laid in rocky and frozen soils.

A known method of opening oil (gas) pipelines and a device for its implementation from German patent No. 19514052, IPC F 16 L 1/026, publ. 10/19/95, in which the upper part of the soil is removed to the depth of the plane being repaired to a plane tangent to the outer surface of the pipeline with the formation of vertical walls of the trench. After that, using a caterpillar machine with symmetrically mounted chain working bodies with devices for transporting soil to the dump, lateral trenches are developed to a depth sufficient to use the undermining milling working body. Next, a milling working body is introduced under the pipeline and the development of side trenches is carried out simultaneously with digging while continuously moving the tracked vehicle.

However, the described method and device have several disadvantages: the machine is difficult to manufacture, does not exclude damage to the pipeline.

Closest to the claimed method is the currently existing in the Russian Federation method of opening the main oil pipelines, described in RD 39-00147105-015-98 "Rules for the overhaul of the main oil pipelines", Ufa, IPTER, 1998, pp. 7-8 (p.2.3 .3), 163 (Rie. B.15), 164-165 (column 1.2, items 2, 3, 4, 6) (prototype is attached) and "Machine for removing soil from under the main oil (gas) pipeline "according to patent No. 2146784 (prototype), IPC F 16 L 1/028, publ. bull. from No. 8, 20 03.2000.

In accordance with the described method, when opening the pipeline, the upper fertile soil layer is first removed using a bulldozer, then, using a bucket excavator, lateral trenches are developed with a depth below the lower generatrix of the pipeline, symmetrical with respect to the longitudinal axis of the pipeline, manually soil is removed directly from the pipeline, and soil is removed from under the pipeline produce a device for undermining.

However, this method of opening limits the rate of linear work by the productivity of two shovels, because at the same time, a larger number of bucket-wheel excavators cannot be used to open the pipeline. The use of continuous machines to increase the pace of work is limited by the topography and soil conditions.

The objective of the invention is to increase the pace of stripping by applying new technology and machines for implementing this technology.

The problem is achieved in that in the proposed method, including removing the upper soil layer using a bulldozer, developing side trenches with removing soil into the side dumps using single bucket excavators, developing the side trenches is carried out in stages: first, below the horizontal axial plane of the pipeline - no more than a quarter of its outer diameter - with the help of single-bucket excavators, then an overburden machine is mounted on the exposed part of the pipeline, side trenches are deepened with overburden working bodies machine below the lower generatrix of the pipeline and continue continuous opening of the pipeline with single bucket excavators and overburden machine while translating it with the development of side trenches and removing soil into the side dumps using transporting devices of the overburden machine.

To implement the method, an overburden machine is used, comprising a frame with running trolleys equipped with grips for the pipeline, supporting elements and a translational movement mechanism, working bodies symmetrically placed on both sides of the vertical axis of the machine, in which each working body is made in the form of a vertically located rotor, having a frame mounted on the frame of the machine, equipped with a rotation drive, a device for removing soil in the side blade, made in the form of a conveyor, and slope and installed on the inner and outer sides of the rotor, the internal slope forming devices being installed with the possibility of removing soil from the pipeline surface in front of the undercarriage, and the external ones with the possibility of adjusting the angle of inclination in the vertical plane.

In addition, to avoid damage to the pipeline when installing the machine on the pipeline, the frame from the ends is equipped with symmetrically placed vertical telescopic support rods with the possibility of fixing their position, while the distance between them is not less than the diameter of the pipeline.

To clean the inner surface of the buckets, the working body of the machine is equipped with a drive cleaning device.

The advantages of the method and the stripping machine for its implementation, its design features are described below and are illustrated by drawings, where:

- figure 1 shows a diagram of the opening of the pipeline currently used by the method (prototype);

- figure 2 shows a diagram of the opening of the pipeline of the proposed method;

- figure 3 is a front view of a machine mounted on a pipeline;

- figure 4 is a side view of the machine (rotary working body conditionally transparent).

The currently used method of opening the pipeline is shown in figure 1 and includes: removing the upper fertile layer (zone I) with a bulldozer, then the upper layer and side trenches (zone II) are developed by single-bucket excavators with soil removal to a dump to a depth below the lower generatrix of the pipeline, sufficient to place a digging machine (or digging device) under the pipeline and soil removed from under the pipeline, manually remove the soil directly from the pipeline and under the pipeline (zone III) - digging machine (or digging device).

The proposed method (figure 2) and the opening of the pipeline when using it is as follows.

As in the currently accepted method, first remove the upper (fertile) layer using a bulldozer (zone I), then the development of side trenches is carried out in stages: first, below the horizontal axial plane of the pipeline - not more than a quarter of its outer diameter - using a single bucket excavator (zone II). The indicated development depth is necessary to accommodate the overburden grabs. Next, the lateral trenches are developed by an overburden machine mounted on the exposed part of the pipeline with a translational displacement drive along the pipeline (zone IIa), equipped with rotary working bodies, deepening the lateral trenches below the lower generatrix of the pipeline. After that, continuous opening of the pipeline by single-bucket excavators and an overburden machine is continued, in which the overburden machine moves along the pipeline and develops side trenches. The removal of soil into the side dumps is carried out by the conveying device of the rotor working body of the overburden machine. The soil remaining under the pipeline (zone III) is developed and removed by a known method and device.

An overburden machine for implementing the method of opening a pipeline contains a frame 1 equipped with support elements - sliders 1, a mechanism 3 for translating the machine along the pipeline 4 with running trolleys 5. The running trolleys 5 are equipped with grippers 6 for the pipeline 4. An electrohydraulic drive 7 is installed on the running trolleys 5. Overburden the machine has working bodies - vertically located rotors 8 with a rotation drive 9, placed on both sides relative to the vertical axis of the machine. Each of the rotors is provided with a frame 10. The frames 10 of the rotors are connected to the frame 1 of the machine.

Inside the rotors 8 there are fixed devices for removing soil into the dump, preferably in the form of conveyors 11. On the inner and outer sides of the rotors 8 there are slope 12 and 13. The internal slope 12 are fixed with the possibility of contact with the pipe 4 and its cleaning in front of the undercarriage 5, and the outer 13 are fixed with the possibility of adjusting the angle of inclination in the vertical plane to obtain the corresponding profile of the trench depending on soil conditions.

The frame 1 of the stripping machine from the ends is equipped with symmetrically placed vertical support rods 14, the distance between which is not less than the outer diameter of the pipe 4, which eliminates the possibility of damage to the pipe 4 during installation and deepening of the machine. The rods 14 are made telescopic with the ability to adjust their vertical lengths and fixation in the desired position.

In order to prevent soil buildup in the buckets, the rotors 8 are equipped with drive cleaning devices (not shown).

An overburden machine operates as described above as follows.

After opening the pipeline 4 with single-bucket excavators to the depth necessary to place the grippers 6 of the overburden machine behind the pipeline 4, namely below its horizontal axial plane by no more than a quarter of its outer diameter, the overburden machine is mounted on the pipeline 4 with the drives of conveyors 11 and rotors 8 turned on At the same time, the extended rods 14 exclude damage to the pipeline 4 by the rotors 8. Prior to installing the machine on the sliders 2 with the fixation of the rods 14, they include a gripper drive 6 for the pipeline 4 and a translational mechanism 3 first moving the machine through conduit 4, continuing opening of the pipe 4 to the development of side trenches to a depth below the lower generatrix of the outer pipe 4. The slope otkosoobrazovateley 13 is determined depending on the soil density.

From the buckets of the rotors 8, the soil is unloaded to the conveyors 11 and sent to the dump. The cleaning device inside the rotors 8 removes the soil remaining in the buckets, which is poured into the buckets and unloaded onto the conveyors 11.

An overburden machine provides continuous development of side trenches. Soil from under the pipeline is removed by a known digging machine, installed after the overburden.

The use of an overburden machine of the described design allows to increase the rate of opening of the pipeline by reducing the amount of work performed by low-productivity single-bucket excavators, as well as by reducing the digging cycle.

Claims (3)

1. A method of opening a pipeline, including removing the upper layer of soil using a bulldozer, developing side trenches with removing soil into the side dumps using shovels, characterized in that the development of side trenches is carried out in stages: first, not more than a quarter below the horizontal axial plane of the pipeline of its outer diameter using bucket-wheel excavators, then an overburden machine is mounted on the exposed part of the pipeline, side trenches are deepened by working bodies of the overburden machine e lower generatrix of the pipeline and the pipeline continues uninterrupted opening shovel and stripping machine it is moved in translation with the development of side trenches, and removing the soil in the lateral blades via transport devices stripping machine. 2. An overburden machine for implementing the method according to claim 1, comprising a frame with running trolleys provided with grips for the pipeline, supporting elements and a translational movement mechanism, working bodies symmetrically placed on both sides of the vertical axis of the machine, characterized in that each working body made in the form of a vertically located rotor having a frame mounted on the frame of the machine, equipped with a rotation drive, a device for removing soil in the side blade, made in the form of a conveyor, and slope the bodies installed on the inner and outer sides of the rotor, the internal slope forming devices being installed with the possibility of removing soil from the pipeline surface in front of the undercarriage, and the external ones with the possibility of adjusting the angle of inclination in the vertical plane. 3. The overburden machine according to claim 2, characterized in that its frame from the ends is equipped with symmetrically placed vertical telescopic support rods with the possibility of fixing their position, while the distance between them is not less than the diameter of the pipeline.

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