Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1989-05-24
1990-08-21
Walton, George L.
Fluid handling
Processes
Cleaning, repairing, or assembling
7386385, 738665, 137317, 137518, 138 93, 138 97, 285197, F16K 4300, F16L 5512
Patent
active
049497448
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for mounting a body in a conduit containing fluid.
The present invention also relates to a device for mounting a body in a conduit containing fluid, consisting of an installation unit provided to be placed at a position where installation of said body is desired, said installation unit being arranged to seal around an area of the surface of said fluid conduit, and the installation unit including a channel which is able to be closed and which is directed to said area of the surface.
When it is necessary to do work in a fluid conduit, for example, for connecting a new device, installation of a valve etc, the system is normally emptied to the necessary degree, which is a procedure requiring much time. After the operation new fluid must be added to the system which, in many cases, is disadvantageous because of the increased risk of corrosion. For example, in order to connect branch conduits without emptying the conduit system it is previously known that a divided T-section may be arranged, which can be connected to a pipe under pressure and, when installation is completed, an explosive charge is activated by means of a blow at a particular position, whereby a hole is formed in the pipe inside the T-section. This device thus does not make it possible to block the existing pipe and is thus suitable only when a branch conduit is connected.
Further there is not available any simple and rapid method to interrupt fluid supply when a leakage occurs in a pipe conduit system.
An object of the present invention is to achieve a widely applicable solution to the problem of enabling intrusive work in an existing installation without having to drain the conduit system of pressurized fluid.
The stated object is achieved by means of a method which is characterized by the steps mounting an installation unit onto the conduit at that place, where mounting of said body is desired, whereby sealing is established against the environment around an area, where a hole in the surface of the conduit will be made, inserting a hole making device into the installation unit through a channel which is kept sealed against the environment, making a hole in the conduit in said area maintaining sealing against the environment, insertion of a body through the sealed channel and the made hole, so that the body is placed in the conduit.
The stated object is also achieved by means of a device, which is characterized by that the blocking device includes means for making a hole in said conduit in said sealed area, that said device includes an expandable body able to be inserted through the made hole and to be placed in said conduit in connection with the sealed area and that said channel includes means for sealing substantially tight against the inserted device for making holes and prevent leakage of fluid to the environment.
The invention will be described below in more detail using exemplifying embodiments with reference to the accompanying drawings of which FIG. 1 shows an installation unit contained in the blockage device according to the invention, FIG. 2 shows a side view of an alternative embodiment of an installation unit mounted on a pipe, FIG. 3 shows a cross-section of a part of the installation unit shown in FIG. 2, FIGS. 4 to 7 show parts which are included in the blockage device according to the invention, FIG. 8 shows an end view of the installation unit according to the invention corresponding to the embodiment in FIG. 1 and FIG. 9 shows a longitudinal section of the installation unit at a stage in which holes are made in a pipe, FIG. 10 shows a longitudinal section of the embodiment of the blockage device according to the invention during blockage, FIG. 11 shows a longitudinal section of the installation device as in FIG. 10 at a stage during which a valve is being installed. FIGS. 12 through 16 show examples of different applications when intrusive work is done on a pipe installation using the present invention. FIG. 17 shows an example of the installation of a probe in a conduit containing f
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Heed Kai
Wikeng.ANG.rd-Heed Anne
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