RU2321794C1 - Device for cutting pipeline off - Google Patents

Abstract

FIELD: pipeline transport.

SUBSTANCE: device comprises frame made of flanges secured to the flanges with bolts, seal mounted inside the frame, and traverses. The seal has housing, bushing to be sealed, stuffing, and lid. One of the traverses is provided with rotatable cantilever having inserts made of solid and ring sealing disks. In order to cut off the pipeline, the studs are dismounted, the seal is shifted along the bushing, and the solid disk is set between the seal and flange. The studs are then mounted, and the housing of the seal and the flange are clamped through the solid disk.

EFFECT: enhanced reliability.

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Description

The invention relates to pipeline transport and can be used to shut off pipelines for technological purposes (installation, repair, testing, etc.).

A device is known for technological overlapping of pipelines, containing grippers covering the pipeline and rotary inserts installed in the grippers for shutting off and passing the flow of the transported medium (see USSR author's certificate No. 1592633). The grips are installed on both sides of the overlap, and the rotary liners are sequentially introduced into the connection and held by the axis in the required position.

The device is not intended for use on flange connections.

Closest to the proposed solution is a device for blocking pipelines (see Gurevich D.F., Shpakov O.N., Zarinsky O.N. Protective-safety devices of oil and gas equipment / Reference manual. - L .: Nedra, Leningrad. , 1991 .-- 576 p., Ill., P. 47, 48). The device is a modified flange connection, contains two flanges with bosses and a removable blind insert. To block the flow of the transported medium, the liner is clamped between the flanges by coupling bolts. In the bosses of one flange, threaded holes are made for the installation of squeeze bolts with the possibility of abutment in the blind bosses of the second flange and the dilution of the flanges with the loose bolts.

The known device is not suitable for operation on large-diameter pipelines and trunk pipelines. After loosening the clamping bolts, the large mass and stiffness of the pipes to be connected cause the flange connection to be skewed and prevent the flanges from breeding for insert installation. Technological overlapping of pipelines is accompanied by laborious operations of centering and sealing flanges.

The problem solved by the invention is to reduce operating costs for the technological shutdown of existing pipelines.

The technical result from the use of the invention lies in the fact that the technological overlap of the pipeline is carried out without changing the position of the connected pipes while maintaining the construction dimensions and centering indicators.

This result is achieved by the fact that in the device for technological overlapping of pipelines containing flanges with bosses and inserts for shutting off and passing the flow of the transported medium, the inserts are placed in a swivel bracket, and the flanges are rigidly connected by traverses fixed in the bosses parallel to the pipeline with the formation of a frame. An oil seal is installed in the frame so that a sealing sleeve is fixed in one flange of the pipeline, and the seal housing is pulled together with the other flange by studs through one of the inserts. The swivel bracket is mounted on one of the traverses.

The drawing shows a General view of the preferred design of the device.

The device is a frame formed by flanges 1, 2 and traverses 3, fixed in the bosses 4 of the flanges by means of terminals 5 and bolts 6. An oil seal is installed in the frame, comprising a housing 7, a sealing sleeve 8, packing 9 and a cover 10 tightened by bolts 11. A swivel bracket 12 is mounted on one of the traverses, in which the liners are placed for overlapping 13 and passing 14 the flow of the transported medium. The insert 13 is made in the form of a blank disk, and the insert 14 is in the form of an annular disk. The sealing sleeve 8 of the stuffing box seal is mounted in the flange 1, and the housing is pulled with the flange 2 through one of the inserts with studs 15.

The device operates as follows.

If it is necessary to shut off the pipeline, the studs 15 are removed, the stuffing box packing is shifted along the sleeve 8 and, by turning the bracket 12, an insert 13 is inserted between the stuffing box packing and the flange 2 to block the flow of the transported medium. Then set the studs 15 and tighten the packing box with the flange 2 through the liner 13.

After completion of work in the same sequence, replace the liner 13 with the liner 14 to pass the flow of the transported medium.

The industrial applicability of the invention is confirmed by bench tests and the operation of the installation series.

The production of the proposed device is implemented in a metalworking plant.

The present invention allows to reduce operating costs for technological overlap of pipelines.

Claims (1)

A device for technological overlapping of pipelines, containing flanges with bosses, inserts for blocking and passing the flow of the transported medium, characterized in that the liners are placed in a swivel bracket, the flanges are rigidly connected to the bosses parallel to the pipeline with traverses with the formation of a frame in which the gland seal is installed, in a sealed sleeve is fixed to one flange, and the seal body is pulled together with the other flange by studs through one of the inserts, while the swivel bracket copulating on a traverse.