Fluid handling – With repair – tapping – assembly – or disassembly means – Assembling – disassembling – or removing cartridge type valve
Patent
1988-10-05
1990-04-17
Walton, George L.
Fluid handling
With repair, tapping, assembly, or disassembly means
Assembling, disassembling, or removing cartridge type valve
1374546, 251312, F16K 4300
Patent
active
049171410
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a remotely manipulatable or telemanipulatable valve.
2. Background Art
In certain industries it is necessary to place valves in areas which are inaccessible to human intervention due to chemical or radioactive contamination risks. The valves must then be maintained with the aid of telemanipulatable arms with limited possibilities and under the control of an operator observing behind a window or camera. It is therefore necessary to use valves which can be dismantled as easily as possible, particularly as their components made from organic materials tend to deteriorate much more rapidly in such aggressive environments.
On the basis of a presently widely used design, the valves are welded to a coupling, whose ends are joined to the fixed part of the pipe. When maintenance is necessary, the valve and coupling are removed, which leads to a number of disadvantages. Firstly the pipes are completely open to the area and discharge their content there, which can considerably aggravate the pollution thereof. The individual components of the valve remain relatively inaccessible and even routine replacements, such as those of gaskets, require a relatively difficult manipulation of the parts, whose service life is considerably longer and which it would therefore be desired to leave on the pipe.
DISCLOSURE OF THE INVENTION
The valve according to the invention permits rapid and easy manipulations by telemanipulatable arms, as well as partial dismantling during which little attention is paid to those parts of the valve requiring no intervention. In particular, the invention makes it possible to maintain the valve body on the pipe, which considerably simplifies maintenance and to a considerable extent prevents the outflow of products contained therein.
More specifically, the invention relates to a valve incorporating a body permanently fixed to the pipe, characterized in that it also comprises assemblies which can be separated from the body by translation movements substantially perpendicular to the pipe, said assemblies being provided with positioning, locking and release means on the body, a first assembly in particular comprising a member for operating the valve, a second assembly ensuring the locking and release of the first assembly with respect to the body and with the second assembly generally located opposite to the first assembly with respect to the body.
According to a preferred construction, the valve comprises three assemblies, the first assembly in particular incorporating an operating member, the second assembly ensuring the locking or release of the first assembly with respect to the body and the third assembly making it possible to actuate the operating member.
Advantageously, the second assembly is positioned opposite to the first assembly with respect to the body and comprises a nut which bears on said body and controls rods ensuring the locking or release of the first assembly by successively bearing on two opposite shoulders.
The second assembly advantageously comprises a device, whose translation controls the locking or release of the second assembly with respect to the body. The translation device comprises a wedge which, at the time of locking the second assembly to the body, partly pushes a ring into a recess of the body and partly below a shoulder of the second assembly.
Finally, it is advantageous to provide a single positioning member, e.g. on the first assembly, on which the various assemblies are positioned on the body.
BRIEF DESCRIPTION OF THE DRAWINGS
The features and advantages of the invention can be better gathered from the following non-limitative description of preferred embodiments and the attached drawings, which show:
FIG. 1: A first assembly as defined hereinbefore in partial section in a vertical plane passing through the axis of the pipe.
FIG. 2: The body and the second assembly.
FIG. 3: The essential parts of the first and third assemblies.
FIG. 4: The assembly of the valve in exploded form.
FIGS. 5 to 10: Stage
REFERENCES:
patent: 3111299 (1963-11-01), Miller
patent: 3133722 (1964-05-01), McQuire et al.
patent: 4531537 (1985-07-01), Smith
patent: 4587990 (1986-05-01), Pennell et al.
patent: 4606368 (1986-08-01), McCafferty
patent: 4617957 (1986-10-01), Sandling
patent: 4671312 (1987-01-01), Bruton
patent: 4727901 (1988-03-01), Horvei
Brunel Jean
Constant Maurice
Commissariat a l''Energie Atomique
Walton George L.
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