RU2234023C1 - Movable pipe junction - Google Patents

Abstract

FIELD: joints or fittings for pipes.

SUBSTANCE: movable pipe junction has a ball member provided with a detachable collar. The latter is made of two semi-rings for embracing the ball. The semi-rings are interconnected via rings. The latter are mounted on axles fitted in the U-shaped slots. The slots are made in one of the faces of the perpendicular section of the semi-rings. From the opposite side the semi-rings are provided with a locking device.

EFFECT: enhanced reliability of joining.

4 dwg

Description

The present invention relates to quick couplings, allowing the mobility of the pipes, and can be used in the construction of pipelines in the oil and gas industry.

It is known to connect pipes containing a cuff and a bell with a split locking ring placed with a gap in the groove with an elastic gasket. However, this pipe connection has a small angular mobility (1.3 ... 2.0 °), which under certain conditions of operation of the pipeline, as a result of extreme stresses caused by high degrees of loading of the main structural elements, can cause its destruction (SU 265635 A IPC F 16 L 37/08, 1969).

The closest technical solution, selected as a prototype, is an articulated pipe connection containing a bell with two grooves, one of which has a seal, and the other has an elastic gasket and a locking element made in the form of a split ring, a cuff made in the form of a ring with an external curved protrusion, a spherical element with two concentric spherical surfaces in contact with a small radius surface with a seal, and a large radius surface with an inner cuff surface (RU 2191948 C2, IPC F 16 L 27/067, 10.27.2002).

However, despite the fact that the compound has undeniable advantages over the analogue, its design has disadvantages. So, a cuff made in the form of an integral ring is installed on the pipe body in the factory before welding the ball element to the pipe, and requires special equipment for its additional retention on the ball element both during delivery of pipes to the route and during assembly of the joint, causing large labor costs for installation.

The present invention solves the problem of retaining the cuff on the ball element without additional equipment, both when exporting pipes to the route, and during the installation of the pipeline line, and also reduces the complexity of operations and installation time.

This problem is solved by installing a detachable cuff on the ball element having an outer truncated conical surface with a curved protrusion, and consisting of two half rings having an internal spherical surface with a radius equal to the large radius of the spherical surface of the ball element, with one of the entire length the sides of the end parts of the parallel section of the half rings is equipped with an internal protrusion made perpendicular to the surface of the half rings, limiting the axial movement of the cuff on the ball element, with interconnected by means of earrings mounted on axes, studded in U-shaped grooves, made on one side of the end parts of the perpendicular section of the half rings, and on the opposite side of the half rings are equipped with a locking device made in the form of a catch-latch mounted in recesses on the outer truncated the conical surface of the half rings, allowing you to fix the split cuff on the ball element. Thus, the technical result of the invention is to retain the cuff on the ball element without additional equipment while maintaining a given angular mobility in the pipe connection.

These signs are essential for solving the task, as:

1) a detachable cuff made in the form of two half rings interconnected by means of earrings mounted on axes, pinned in U-shaped grooves, made on one side of the end parts of the perpendicular section of the half rings, this makes it possible to complete the connection with removable parts during the preparation of the pipeline to deployment;

2) the semicircles of the split cuff are provided with a locking device made in the form of a clip-latch installed in the recesses on the outer truncated-conical surface of the half rings, this makes it possible to fix the split cuff on the ball element;

3) the semicircles of the split cuff on one side of the end parts of the parallel section along the entire length are equipped with an internal protrusion made perpendicular to the surface of the semicircles, due to this, the axial movement of the cuff along the pipe body and its retention on the ball element during the withdrawal of pipes to the route and to the process of their installation.

Comparative analysis with the prototype showed that the claimed device differs from the known one in that the cuff is detachable in the form of two half rings with the ability to encircle the sphere, while the half rings are interconnected by means of earrings mounted on axes, pinned in U-shaped grooves made on one from the sides of the end parts of the perpendicular section of the half rings, from the opposite side the half rings are equipped with a locking device made in the form of a clip-latch installed in the recesses on the outer truncated o-conical surface of the half rings, while along the entire length one of the sides of the end parts of the parallel section of the half rings is equipped with an internal protrusion made perpendicular to the surface of the half rings, and thus, the combination of these “essential features” meets the criterion of “sufficiency to achieve the technical result provided by the invention” .

The invention is illustrated by drawings.

Figure 1 - section of a movable pipe connection.

Figure 2 - section bb in figure 1;

Figure 3 - section aa in figure 1, presents the latch bracket.

Figure 4 is a section bB in figure 3

The proposed movable pipe connection includes the execution on the pipes 1 and 2, respectively, the bell 3 and the ball element 4. The bell 3 is equipped with a split locking ring 5, placed in a groove with an elastic gasket 6 (for example, from microporous rubber). On the ball element 4 having two concentric spherical surfaces with different radii (R and r), a detachable sleeve 7 is installed, made in the form of two half rings 8, 9 with an external curved protrusion and an internal spherical surface with a radius (R) equal to the large radius of the ball element 4. The half rings are equipped with a locking device made in the form of a clip-latch 10, fixing the detachable sleeve 7 on the ball element 4 and an internal end protrusion 11, limiting the axial movement of the detachable sleeve 7 on the ball element 4. the rings 8, 9 are connected on one side to each other by the earrings 12 movably pinned into them. A pipe 2 with a ball element 4 and a detachable sleeve 7 is inserted into the socket 3 and fixed therein using a split locking ring 5. At the point of contact with the ball element 4 along a surface of small radius (r), the bell 3 is equipped with a rubber self-sealing ring 13 made in the shape of a dovetail in cross section.

Mobile pipe connection works as follows. When connecting pipes 1 and 2, a ball element 4, squeezed over the radius R with a detachable sleeve 7, is inserted into the socket 3. When moving axially inside the socket 3, the detachable sleeve 7, pushed by the mounting closure, unclenches the split locking ring 5, recessing it into the cavity placing the elastic strip 6 in the socket 3. With further movement of the split sleeve 7 in the socket 3, its curved protrusion passes through a split locking ring 5, the latter, under the action of the accumulated elastic deformation forces, leaving the placement cavity elastic gasket 6 in the socket 3, tends to take its original shape behind the curved protrusion, preventing the detachable cuff 7 from moving in the opposite direction and thus closes the pipe connection.

The use of the invention will allow to complete the connection with removable parts during the preparation of the pipeline for deployment, it will not require special equipment to additionally hold the cuff on the ball element both when the pipes are delivered to the route and during assembly of the connection, reduce the labor required to install the connection, and provide a sufficiently high angular pipe mobility in connection.

Claims (1)

A movable pipe connection containing a bell with two grooves, in one of which a seal is installed, and in the other an elastic gasket and a locking element, a cuff made in the form of a ring with an external curvilinear protrusion, a ball element with two concentric spherical surfaces in contact with a surface of small radius with sealing, and a large radius surface with the inner surface of the cuff, characterized in that the cuff is made detachable in the form of two half rings with the ability to wrap around a sphere, while the half ring interconnected by means of earrings mounted on axes, pinned in U-shaped grooves, made on one side of the end parts of the perpendicular section of the half rings, on the opposite side of the half rings are equipped with a locking device made in the form of a catch-latch mounted in recesses on the outer truncated the conical surface of the half rings, while along the entire length one of the sides of the end parts of the parallel section of the half rings is equipped with an internal protrusion made perpendicular to the surface of the half rings.

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