RU2312267C1 - Device for locking pipeline - Google Patents

Abstract

FIELD: pipeline engineering.

SUBSTANCE: device comprises base, vertical stands, and stops secured to the stands and made of four plates arranged in pairs and provided with bevels diverging downward. The stops are additionally provided with U-shaped screws secured to the transverse shelves of the stops. The base is mounted on the trench slope for permitting vertical movements with respect to the axis of the pipeline.

EFFECT: expanded functional capabilities.

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Description

The invention relates to the field of construction and repair of pipelines for transporting liquid and gaseous products. It can be used in the repair of pipelines with the replacement of a defective area with a repair “coil”.

At least three methods are known for repairing pipelines with replacing a defective section with a repair “coil” — without centering the pipes, centering the pipes after cutting the defective section, and a method with preliminary fixing the pipeline before cutting the defective section. The latter method allows you to eliminate the displacement of the pipes after cutting the defective area and thereby greatly simplify the marking and fitting of the repair "coil", which significantly reduces the repair time and improves its quality.

A device for centering pipes / 1 / is known, which fixes pipes before cutting a defective area and centers pipes and a repair "coil" during marking and welding operations. It consists of two clamps equipped with hinges and bolts for locking on the pipeline, and tides to accommodate the power stringers. Power stringers are threaded through the holes of the tide of the clamps and fastened to them with nuts. In addition, movable adjustable stops are mounted on the stringers to maintain the repair “coil”. After assembling the device in the pipeline, fixing and centering of the pipes remaining after cutting the defective section is achieved.

The known device has the following disadvantages: the complexity of the design, the high complexity of mounting the device on the pipeline, the low accuracy of the centering of the pipes, due to the displacement of the pipeline due to its own weight due to lack of support. In addition, the presence of four stringers and several stops makes it difficult to access the pipeline during marking and welding, which reduces their productivity.

The closest in technical essence to the claimed invention is a support device for supporting the main pipeline / 2 /, containing a base, vertical struts, balancing arms with stops made in the form of bushings placed on racks movably. A suspension with rollers supporting the pipeline is pivotally mounted on the balancing levers.

The disadvantages of the prototype invention are the design complexity, significant metal consumption, the high complexity of installation during Assembly of the device on the pipeline, which reduces the performance of repair work.

The present invention is aimed at simplifying the design of the device for fixing the main pipeline, reducing the complexity of its installation on the pipeline and increasing the productivity of repair work.

The problem is solved in that in the device for fixing the main pipeline during repair work with the replacement of the defective section with a repair “coil” consisting of a base, vertical posts and fixed stops on them, the stops are made in the form of four pairwise arranged plates with bevels extending downward, with this emphasis is additionally equipped with U-shaped cables mounted on the transverse shelves of the said stops, and the base is mounted on the slopes of the repair pit with the possibility of vertical movements of the relative about the pipe axis.

A device for fixing the main pipeline is illustrated in figures 1-3, where it is presented in two projections with longitudinal and transverse sections.

The device for fixing the main pipeline consists of a base 1 mounted on the slopes of a repair excavation pit 2, four vertical posts 3 and two U-shaped cables 4.

The base 1 has a box construction of channels. Threaded supports 5 are mounted in the corners of the structure, with the help of which the base together with the racks 3 mounted on it has the possibility of vertical movements relative to the axis of the pipeline 6. Four stops 7 are mounted on the vertical racks 3, which are made in the form of pairwise arranged plates with bevels extending downward.

The bevels of the stops 7 are necessary for covering the pipeline from above, while the contact of the stops with the surface of the pipeline occurs at two points. The presence of bevels expanding downward in the stops allows the device to be used for fixing pipelines of various diameters.

Shelves 8 are mounted on the lateral outer surface of the stops 7, which serve for mounting U-shaped cables 4 on them, which cover the pipeline from below and fix it.

Vertical posts 3 and pairwise arranged stops 7 are mounted on the edges of the base 1 so that the pipeline is fixed at the ends of the defective section at a distance of 200-500 mm from the joints of the pipes and the repair coil.

The proposed device for fixing the main pipeline works as follows. When carrying out repair work, they first open the soil and dig a repair pit. Next, the defective area is determined and its boundaries are outlined. Then, on the slopes of the pit 2, the base 1 of the device is installed and its position relative to the pipeline 6 is adjusted so that the stops 7 come into contact with the surface of the pipeline at two points. The adjustment of the position of the base relative to the pipeline is carried out by displacing the base in horizontal and vertical planes. The movement of the base in a vertical plane is provided by threaded supports 5.

Next, from the lower side of the pipeline installed guys 4, which are fixed on the transverse shelves 8 of the stops 7 using nuts.

As a result of the described operations, the pipeline is reliably and rigidly fixed in two places along the boundaries of the defective area. After fixing the pipeline, they begin to cut out the defective area and conduct marking and welding work to replace the defective area with a repair “coil”.

The implementation of the stops in the form of plates with bevels expanding downward, provides for the setting of the pipeline in its upper part and eliminates its possible upward displacement in the vertical plane and left-right in the horizontal plane. The presence of U-shaped cables fixed on the stops, eliminates the possible shift of the pipeline down. In general, stops and cables ensure reliable fixation of the pipeline before and after cutting the defective area.

The fact that the base of the device is mounted not on the bottom of the pit, but on its slopes, can significantly reduce the complexity of installing the device on the pipeline. This is also facilitated by the presence of threaded supports in the corners of the base, which allows you to adjust the position of the base, and therefore the stops relative to the pipeline.

Compared to the prototype invention, the proposed device for fixing the main pipeline has the following technical and economic advantages:

a) The proposed device is much simpler in design, does not contain special parts (balancers, rollers, cast parts, etc.) and is completely made of rolled materials, which significantly reduces the cost of its manufacture (1.5-2 times);

b) The proposed device provides a rigid and reliable fixation of the pipeline before and after cutting the defective area, in contrast to the invention of the prototype, which only supports the pipeline without fixing it in horizontal and vertical planes;

c) The complexity of the installation of the proposed device in connection with a significant reduction in the number of different parts included in its composition, 2-3 times less than that of the prototype invention, which allows to accelerate repair work;

d) Rigid and reliable fixation of the pipeline, achieved by using the proposed device, contributes to a more accurate centering of the pipes and, accordingly, to increase the accuracy of the marking of the repair "coil" and the productivity of the marking operations;

d) In general, the proposed device helps to increase the productivity of repair work and improve their quality.

The proposed device will find application in the manufacture of repair work on pipelines.

Information sources

1. Patent No. 2217650, M.C. F16L. Device for centering pipes.

2. Patent No. 2079761, M.C. F16L. Support device for supporting the pipeline.

Claims (1)

Device for fixing the main pipeline during repair work with replacing the defective area with a repair “coil”, consisting of a base, vertical posts and stops fixed to them, characterized in that the stops are made in the form of four pairwise arranged plates with bevels extending downward, while the stops additionally equipped with U-shaped cables mounted on the transverse shelves of the mentioned stops, and the base is mounted on the slopes of the repair pit with the possibility of vertical movements relative to axis of the pipeline.

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