RU2249080C2 - Device for compacting soil in trench under pipeline - Google Patents

Abstract

FIELD: construction engineering.

SUBSTANCE: invention relates to methods and devices used for repair of underground pipelines and it can be used for compacting soil at sides and under pipelines of large diameter at repairing with digging down. Proposed device has single-bucket excavator as base machine whose working equipment is source of compacting motions, mechanism to transmit said motions to soil secured to dipper stick and working members with compacting plates. Mechanism to transmit compacting motions to soil is made in form of cylindrical ram connected to dipper stick of excavator and provided with fork on lower end whose eyes are connected with saddle. Ram is movable enclosed by cup with eyes on its upper end carrying rocker with tie-rods. Working members are made in form of two opposite bell cranks provided with compacting plates on ends. Bell cranks are hinge-connected with eyes of fork by means of common axle. Bell cranks are hinge-connected with tie-rods of rocker, and eyes of cup are hinge-connected with shackle of excavator dipper stick by means of tire-rod.

EFFECT: provision of guaranteed compaction of soil under large-diameter pipeline.

3 dwg

Description

The invention relates to the field of repair of underground pipelines and can be used to compact soil on the sides and under a pipeline of predominantly large diameter when it is being repaired with undermining.

To date, pipelines after repair are buried without preliminary compaction of soil around the pipeline.

The need for a compaction operation is proved by the following factors:

1. When conducting overhaul with undermining, the pipeline on one side of the pit constantly rests on a rigid earthen prism, and on the opposite side the pipeline thread lies on freshly poured soil with voids under the pipeline. Naturally, under such conditions, a pipeline laid on freshly poured soil drops below the design position, bending the pipeline thread and causing increased stress in it, especially around the transverse seam. Cases of oil breakthrough at the locations of the transverse joints of the pipeline are recorded.

2. According to RD 39-00147105-011-97, “Table of Technical Equipment for Overhaul Services for Main Oil Pipelines”, three expensive powerful (285 kW) “Komatsu-D 355 S” pipe layers are laid during repairs with digging of a pipeline with a diameter of 1220 mm to maintain the pipeline . According to RD 39-00147105-016-98, in the case of using a soil compaction device, only two (similar) pipe layers are used. So the introduction of the operation of undermining does not lead to additional costs. Moreover, the power of the base excavator of the proposed device for sealing only 98 kW.

3. Uncompacted soil eventually settles and peels off the insulation coating on the sides of the pipeline.

4. The pipeline will be below the design level.

It is known “Device for compaction of soil in a trench when laying a pipeline” (see AS USSR No. 1520185 A1, IPC E 02 D 3/046, 1989), [1] containing a source of sealing movements, a base machine carrying source of sealing movements, mechanism for transmitting sealing movements to the ground.

The source of sealing movements is made in the form of a pathogen of oscillations in a vertical plane. The transmission mechanism of the sealing movements consists of a glass connected to the oscillation pathogen and a rocker arm pivotally connected to the glass. Two vertically arranged working bodies are attached to the ends of the rocker arm, made in the form of vertical racks with sealing plates at the end. The mounting design of the sealing plate allows it to be attached at an angle.

However, the specified device [1] is designed for compaction of soil located on the sides of the pipeline only during its construction, when the pipeline rests on hard soil.

Such a device [1] cannot condense the soil under the pipeline, and is guaranteed to eliminate voids under the pipeline that form during free backfill. The method of arranging the sealing plate at an angle does not solve the issue of compaction of the soil under a large-diameter pipeline, since due to significant loads directed perpendicular to the working body stand, the transmission mechanism of the sealing movements is extremely massive and the corresponding source of sealing movements (vibrator) is also not practical bulky.

The closest technical solution, selected as a prototype, is a device for compaction of soil in a trench under the pipeline during repair (see EPO Patent 0220373 A2, IPC E 02 D 3/074, 05/05/1987), [2] containing as a basic machine, a single-bucket excavator, the working equipment of which is a source of sealing movements, a mechanism for transmitting sealing movements to the ground attached to its handle and a working body with a sealing plate.

The disadvantage of the device for compaction of soil in the trench under the pipeline [2], selected as a prototype, is that it is designed to compact the soil located on the sides of the pipeline, only during construction, when the pipeline rests on hard soil, this device cannot be compacted soil under the pipeline and eliminate voids under the pipeline that form during free backfill.

The technical task of the proposed device for compaction of soil in a trench under the pipeline during repair is to achieve guaranteed compaction of the soil under the pipeline of mainly large diameter (over ⌀ 820 mm, as well as ⌀ 1020 ... 1220 mm) and the elimination of voids under the pipeline that remain after free filling .

To achieve the technical result in the proposed device for compaction of soil in a trench under a pipeline during repair, containing as a base machine a bucket excavator, the working equipment of which is a source of sealing movements, a mechanism for transmitting sealing movements to the soil, attached to its handle, and a working body with a sealing plate , unlike the prototype, it is equipped with an additional working body with a sealing plate, and the mechanism for transmitting sealing movements to the ground is made in in the form of a cylindrical rolling pin attached to the handle of the excavator and having a fork at the lower end, with a saddle connected to the ears, the rolling pin being movably covered by a glass with ears at its upper end, carrying a beam with rods, while the working bodies are made in the form of two opposite, having at the ends, sealing plates of two shoulders of the levers pivotally connected to the ears of the fork through a common axis, while the levers are pivotally connected to the rods of the rocker arm, and the ears of the glass are pivotally connected to the earring of the handle of the excavator vehicle traction at an angle that provides soil compaction, which is under the pipeline.

Introduction to compaction operation technology allows:

- repair pipelines with digging by two pipe layers instead of the traditional three;

- eliminates the appearance of a dangerous stress state of the pipeline during the repair;

- eliminates the damage to the insulation of the repaired pipeline due to subsidence of soils adjacent to the pipeline.

The proposed device for compaction of the soil in the trench during the repair of pipelines is illustrated by the drawings shown in figures 1-3.

Figure 1 shows a General view of a device for compaction of soil in a trench during the repair of pipelines; figure 2 is a section aa in figure 1; figure 3 is a section bB in figure 1.

The inventive device for compaction of soil in a trench during pipeline repair consists of a single-bucket excavator 1 (Fig. 1), the working equipment 2 of which serves as a source of sealing movements, the transmission mechanism of sealing movements 3 to the soil, which is attached to the handle 4 of the working equipment using a cylindrical rolling pin 5 and adapter 6. The rolling pin 5 carries a fork 7 located on its lower end, to the ears of which a saddle 8 is pivotally connected. Two working bodies made by the common axis 9 are connected to these ears x as dvuhplechih arms 10 with sealing plates 11 at the ends. The rolling pin 5 is movably axially covered by a cup 12, with ears 13 at its upper end, which are connected to the earring 14 of the excavator 1 by means of a rod 15. The outer diameter of the cup 12 is covered by the opening of the rocker arm 16 to limit the nut 17 from moving along the axis of the cup 12 (figure 2 )

The adapter 6 is a box into which the end of the handle 4 is inserted and fastened to it by two conical bushings 18 pulled together by the bolt 19. Such a complicated connection design is caused by the fact that it is impossible to set the hole of the adapter 6 in alignment with the hole of the handle 4.

From the turn, the handle 4 is limited by a stop 20, which presses the handle to the support 21 with bolts 22. The flange 23 of the sleeve 24 is attached to the adapter flange 6 through the spacer 25, and the sleeve 24 itself is fixedly connected to the rolling pin 5.

To orient the position of the working body relative to the pipeline 26, a spring-loaded pointer 27 of the position of the working body in height and a horizontal pointer 28 are provided.

To determine the initial position of the working equipment 2 before starting work at each cycle and to determine the amount of boom rotation, a fixed bar 29 is attached to the frame of the excavator 1, and a movable arrow 30, a hydraulic cylinder 31 are attached to the cab.

At the ends of the rocker arm 16, the rods 32 are pivotally mounted, the second ends of which are also pivotally connected to the two-arm levers 10.

The device operates as follows.

The excavator 1 is set relative to the pipeline 26, leading the pointer 28 to the pipeline, as shown in figure 1, and the angular initial position of the working equipment 2 of the excavator 1 is set according to the marking on the fixed bar 29. After that, the handle 4 together with the sealing plates 11 are lowered vertically down to the pointer 27 contacts the pipeline 26, then the hydraulic cylinder 31 lowers the beam 16, moving the sealing plates 11 under the pipeline space.

Returning the rocker 16 to its original position, the sealing plate 11 is brought out from under the pipeline space, and by lifting the handle 4 up, the sealing plates 11 are taken out of the ground. After that, the working equipment 2 is deployed at a given angle on the fixed bar 29. The cycle repeats.

Sources of information taken into account

1. USSR Copyright Certificate No. 1520185 A1, IPC E 02 D 3/046, 1989

2. EPO patent No. 0220373 A2, IPC E 02 D 3/074, 05/06/1987

Claims (1)

A device for compaction of soil in a trench under a pipeline during repair, containing a bucket excavator as a base machine, the working equipment of which is a source of sealing movements, a mechanism for transmitting sealing movements to the soil attached to its handle, and a working body with a sealing plate, characterized in that it equipped with an additional working body with a sealing plate, and the mechanism for transmitting sealing movements to the soil is made in the form of a cylindrical rolling pin attached to the handle of the excavator, and having a fork at the lower end, with a saddle connected to the ears, and the rolling pin is movably covered by a glass with ears at its upper end, carrying a beam with rods, while the working bodies are made in the form of two oppositely located, having ends of the two-arm levers, pivotally connected with the ears of the fork through a common axis, while the levers are pivotally connected to the rods of the rocker arm, and the ears of the glass are pivotally connected to the earring of the handle of the excavator by means of traction.

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