Fluid handling – With repair – tapping – assembly – or disassembly means – Tapping a pipe – keg – or apertured tank under pressure
Patent
1996-01-04
1997-10-14
Walton, George L.
Fluid handling
With repair, tapping, assembly, or disassembly means
Tapping a pipe, keg, or apertured tank under pressure
138 94, 138 97, 251250, F16K 1308, F16L 4104, F16L 55128
Patent
active
056761716
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a device for blocking flow in a pipeline in accordance with the preamble of the subsequent claim 1.
BACKGROUND OF THE INVENTION
It is known from for example SE 8605201-1 to arrange a blocking in a pipeline which is under pressure. This known device comprises a bladder which is caused to expand in the pipeline by means of compressed air. This device has a natural upper limit regarding applications in pipelines with large dimensions and high levels of pressure.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a blocking device which may be applied to pipelines with small as well as large pipeline dimensions, and low as well as high fluid pressures.
Said object is obtained by means of a device in accordance with the present invention, the features of which will be apparent from the subsequent claim 1.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described with certain embodiments, with reference to the annexed drawings, in which
FIGS. 1, 2 and 3 show partly sectioned views of components forming part of the device according to the invention, according to a first embodiment,
FIG. 4 shows a cross-section of the device in a hole-making stage,
FIG. 5 shows a cross-section of the device according to FIGS. 1 to 4, prepared for the insertion of a blocking means according to the invention,
FIG. 6 shows a corresponding view with the device according to FIGS. 1 to 5 in a blocking position,
FIG. 7 shows a cross-section on a larger scale of the blocking means along the line VII--VII in FIG. 5, the blocking means being shown in an open position,
FIG. 8 shows a corresponding view of the blocking means in the form of a cross-section along the line VIII--VIII in FIG. 6, showing a blocking position, whereas
FIG. 9 shows a cross-section of the device along the line IX--IX in FIG. 8,
FIG. 10 shows a cross-section of the remaining device after the blocking is finished,
FIG. 11 shows an alternative embodiment of a part,
FIG. 12 shows a longitudinal cross-section of a blocking means forming part of the invention, in a second embodiment,
FIG. 13 shows a clamp member forming part of the invention, in a second embodiment, and
FIG. 14 shows, on a larger scale, a partial sectional view of the embodiment according to FIG. 12, however somewhat modified.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The main components of the blocking device, which thus are shown in a first embodiment in FIGS. 1 to 3, are a clamp member 1 including a pipe socket 2, a hole-making tool 3, a blocking means 4 and a driving device 5 for the hole-making tool as well as the blocking device. The clamp member has inner surfaces 6, 7 of cylinder-jacket shape, adapted for sealingly surrounding a section of the pipeline, the fluid of which is to be blocked. In order to accomplish this without having to screw the clamp member on from either end of the pipeline, the clamp member is divided into two roughly halfcylinder-shaped parts 8, 9 with flanges 10 intended to be joined to each other by means of screws (see FIG. 4) and thus pressing against the outer mantle surface of the pipeline. The pipe socket 2 comprises an inner part 11 which is integrated with the clamp member 1, or more precisely its first part 9, so that the inner part 11 presents a through-duct 12 with an opening 13 outwardly from the clamp member and an opening 14 inwardly towards the space 15 delimited by the clamp member.
The pipe socket 2 is divided into the inner part 11 and an outer part 16 which is releasably attachable to the inner part 11 with a closing valve 17 interpositioned in the partition location 18 of the inner and outer parts of the pipe socket. In this respect, the inner part 11 is provided with a flange 19 around the opening 13, for sealingly fitting to one flange 20 of the closing valve 17, whereas the other flange 21 of the closing valve is intended for sealingly mounting of the outer part 16 of the pipe socket, more precisely at a flange 22 which surrounds an inner opening 23 of the
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Walton George L.
Wikengard-Heed Anne
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