RU2451864C1 - Pipeline compensating device (versions) - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: pipeline compensating device comprises branch pipes and flanges. The branch pipes are connected with each other by a bent branch pipe with the branch pipes laying in the same plane. Compensating elements are represented by three bellows expansion joints compensating the travel at a solid angle. Two compensators are a part of one branch pipe, and the third one - as a part of the other branch pipe. A middle portion of the compensating device comprises a support providing the travel of the compensating device in a plane. The support is rigidly attached to a fixed member of the structure. Under the second version, the pipeline compensating device accommodates two of bellows expansion joints compensating the travel at the solid angle, and are a part of one branch pipe, while the third bellows expansion joint which is a part of the other branch pipe compensates the angular motions in the plane of the compensating device. A rotation axis of the compensator is perpendicular to the plane of the compensating device.

EFFECT: higher operational reliability of the pipeline compensating device.

2 cl, 2 dwg

Description

The invention relates to pipeline transport and can be used in various types of industry (gas, oil, dairy, aviation, space, etc.), where it is necessary to compensate for the angular and linear movements of pipelines within wide limits.

The compensation elements of the pipeline ensure its operability with relative movements (linear and angular) of the elements connected by them, and the options for using compensation elements depend both on the size and nature of these movements, and on the capabilities of the compensation elements themselves.

As compensating elements, for example, bellows expansion joints are used, which can be made both with external cardan units and with internal hinges, which respectively provide compensation for angular displacements both in solid angle and in one plane.

Often, it is necessary to compensate for angular and linear movements within significant limits, for example, in a long pipeline.

Known compensation device of the pipeline according to patent No. 2265769, containing three interconnected nozzle joints made in the form of hollow spheres inserted one into the other, which is adopted as a prototype.

The disadvantages of the prototype is:

- under the influence of vibrodynamic loads (the source of which can be, for example, a pump for pumping a working fluid), the compensation device of the pipeline is not limited by movements in the direction perpendicular to the plane of hinge placement, as a result of which destruction can occur at resonant frequencies, which significantly reduces reliability construction;

- hinges made in the form of hollow spheres inserted one into the other require additional sealing elements, which also reduces the reliability of the device.

The present invention is to increase the reliability of the compensation device of the pipeline.

In the compensation device of the pipeline containing the nozzles and flanges, the task according to the first embodiment is solved due to the fact that the nozzles are interconnected by a curved nozzle, and the nozzles lie in the same plane, three bellows expansion joints are used as compensating elements, compensating for movement in solid angle, two of which are part of one pipe, and the third - as part of another pipe; in the middle part of the compensation device, a support is installed that provides movement in the plane of the compensation device, and the support itself is rigidly fixed to a fixed structural element.

In the compensation device of the pipeline containing the compensating elements, nozzles and flanges, the task according to the second embodiment is solved due to the fact that the nozzles are interconnected by a curved nozzle, and the nozzles lie in the same plane, three bellows compensators are used as compensating elements, two of them compensate displacements in solid angle and are part of one nozzle, and the third bellows compensator, which is part of another nozzle, compensates for angular displacements in the compensation plane device, and the axis of rotation of the compensator is perpendicular to the plane of the compensation device.

Figure 1 shows the compensation device of the pipeline according to the first embodiment using the support, figure 2 shows the compensation device of the pipeline according to the second embodiment, where:

1 - flanges;

2 - bent pipe;

3 - bellows expansion joints;

4 - nozzles;

5 - plane compensation device;

6 - support;

7 - fixed structural element;

8 - the middle part of the compensation device;

9 - base;

10 - axis of rotation of the compensator;

11 - free clip.

The compensation device of the pipeline according to the first embodiment, comprising nozzles 4 and flanges 1, nozzles 4 are interconnected by a curved nozzle 2, and nozzles 4 lie in one plane, compensating elements, which are used three bellows expansion joints 3, compensating for movement in solid angle, two of which are part of one nozzle 4, and the third - as part of another nozzle 4. In the middle part of the compensation device 8, a support 6 is installed, providing movement in the plane of the compensation device 5, and the support 6 itself is rigidly fixed to a fixed structural member 7.

The support 6 can be made, for example, in the form of a base 9, rigidly fixed to a fixed structural member 7, with a free clip 11. The support 6 allows the section of the compensation device with one bellows compensator 3 to move only in the plane of the compensation device 5, and the section of the compensation device with two bellows expansion joints 3 has no restrictions on movements.

The support 6, mounted on a fixed structural member 7, will perceive the transverse load, while forming a spatial connection system that provides dynamic and static structural strength.

The compensation device of the pipeline according to the second embodiment, comprising nozzles 4 and flanges 1, nozzles 4 are interconnected by a curved nozzle 2, and nozzles 4 lie in the same plane, compensating elements, which are used three bellows expansion joints 3, two of which compensate for movement in the body corner and are part of one pipe 4, and the third bellows compensator 3, which is part of another pipe 4, compensates for angular displacements in the plane of the compensation device 5, and the axis of rotation of the comp nsatora 10 perpendicular to the plane of the compensating device 5.

The distances between the bellows expansion joints 3 are determined by calculation from the conditions of compensation of the maximum calculated values of the relative displacements, while the plane of the compensation device 5 is positioned as close as possible to the plane in which the maximum displacements are formed.

In bellows expansion joints 3, the bellows are connected to the flanges in a welded version, so no additional sealing elements are required.

In the second embodiment, the load acting on the compensation device in the direction perpendicular to the plane of the compensation device is perceived by the hinge assembly of the bellows compensator 3, which compensates for angular displacements only in the plane of the compensation device 5.

Compensation device pipeline works as follows.

During operation, the compensation device of the pipeline compensates for all longitudinal and lateral movements due to the bending of the bellows expansion joints 3 according to the first embodiment, the middle part of the compensation device 8 moving in the support 6 in the plane of the compensation device 5.

During operation, the compensation device of the pipeline according to the second embodiment compensates for all longitudinal and transverse movements due to the bending of the bellows expansion joints 3.

The compensation device of the pipeline is located in the plane of greatest relative displacements, which will allow it to work in the most favorable conditions.

The flexibility of the bellows expansion joints 3 is determined by their rigidity.

The proposed compensation device of the pipeline can compensate for movement within wide limits, including technological (installation) movement. If the maximum relative displacements relative to the zero position are not the same, then it is possible to increase the possibilities of compensation due to the bending of the bellows expansion joints 3 in the direction of a smaller value of the relative displacements, artificially shifting the zero position by the required value. It is advisable to perform this operation during the installation of the pipeline compensation device with control of the change in the bending angles of the bellows expansion joints 3, and it should be borne in mind that the middle bellows expansion joint 3 bends at a larger angle than the other two due to the redistribution of angular movements between the bellows expansion joints 3 taking into account their rigidity.

Improving the reliability of the compensation device of the pipeline is achieved by introducing into the design of the compensation device of the pipeline additional links in the form of a support 6 according to the first embodiment and in the form of a bellows compensator 3 with one axis of rotation 10 according to the second embodiment, which provide dynamic and static structural strength.

In addition, no additional sealing elements are required due to the fact that the bellows expansion joints 3 are made in a welded version.

Claims (2)

1. Compensation device of the pipeline containing nozzles and flanges, characterized in that the nozzles are interconnected by a curved nozzle, the nozzles lying in the same plane, compensating elements, which are used three bellows expansion joints, compensating for movement in solid angle, two of which are in the composition of one pipe, and the third - in the composition of another pipe; in the middle part of the compensation device, a support is installed that provides movement in the plane of the compensation device, and the support itself is rigidly fixed to a fixed structural element. 2. Compensation device of the pipeline containing nozzles and flanges, characterized in that the nozzles are interconnected by a curved nozzle, the nozzles lying in the same plane, compensating elements, which are used three bellows expansion joints, two of which compensate for movement in solid angle and include the composition of one pipe, and the third bellows compensator, which is part of another pipe, compensates for angular displacements in the plane of the compensation device, and the axis of rotation of the compensator perpendicular to the plane of the compensating device.

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