Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1989-10-04
1991-10-01
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
Direct response valves
137509, 1375137, 137556, 1375992, 251152, F16K 1506
Patent
active
050524330
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns connector-starters for progressive pressurization of pneumatic installations. It especially concerns those connector-starters which are to be attached to transmitting or receiving pneumatic components.
It frequently occurs that during the cut-off of compressed air which supplies a pneumatic installation, the thrusters it uses are voluntarily or involuntarily disturbed from their normal position. The sudden return of pressure via the sectioning valve is then accompanied by shocks that are harmful to equipment and can result in bodily harm. To reduce these dangers, apparatus known as starters exist which ensure during the arrival of compressed air, firstly, a progressive filling which permits activators to gently regain their position, then fully open the passage to a normal flow for installation operation.
These starters are fixed components, bulky and costly, and require the use of piping connectors. Moreover, they are designed to be installed at the head of the installation's internal air distribution network, they protect the entire volume, resulting in a longer waiting time for filling, when in fact, only certain actuators actually require protection.
SUMMARY OF THE INVENTION
The present invention of connector-starters makes it possible to avoid these disadvantages by creation of two different apparatus versions in respect to their use, but which both replace the traditional connectors for which they are a substitute while continuing to ensure starter operation. The first version of these apparatus is designed to be screwed into receiving pneumatic components, such as distributors; fluid arrives via the connected pipeline. The second version of the apparatus is designed to be screwed onto transmitting pneumatic components, such as sectioning and purge valves known as section switches; in this case, the air flow exits through the connected pipeline.
In each version, in accordance with the invention a connector-starter is presented in an elbow joint form known as a "banjo", which includes a module equipped with means for pipeline connection, this module being adjustable around a hollow screw when attached to the connector, and interchangeable according to the nature and diameter of the pipeline to be connected. The hollow screw includes means for controlled and reduced filling flow of the downstream installation, established in bypass from a seat that is closed at the rest position by a valve and which constitutes the main passage through the apparatus; the valve is pushed closed by a light return spring whose strength is insignificant in relation to the forces brought into play by pressures and just sufficient to overcome friction. The valve is integral to a smaller section rod which extends in the direction opposite from the seat toward the extremity of the opposing hollow screw at its threaded attachment extremity. The free extremity of this rod enters the open air following a gasket through which it slides and is guided inside of the bore of this gasket's retaining plug which closes the apparatus. The return spring is supported by the plug and a valve shoulder. The cylindrical wall of the hollow screw is perforated by peripheral holes which ensure, when the valve is open, the full passage of fluid between the threaded opening and the vortex chamber of the adjustable model connected to the pipeline.
BRIEF DESCRIPTION OF THE DRAWINGS
Other advantages and characteristics of the invention will be better understood after reading the description following the several creation modes, accompanied by a reading of the drawings (where the same elements are designated with the same numerical references), these include the following:
FIG. 1 is a longitudinal section of the first type of connector-starter construction based on the version of the invention attached to a pneumatic receiving component,
FIG. 2 is a longitudinal section of the first type of connector-starter construction based on the version of the invention attached to a pneumatic transmitting component,
FIGS. 3 to
REFERENCES:
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patent: 2299847 (1942-10-01), Price
patent: 2304404 (1942-12-01), Flanagan
patent: 2732169 (1956-01-01), Matteo
patent: 2766593 (1956-10-01), Mitchell
patent: 3683959 (1972-08-01), Tsuji
patent: 4192346 (1980-03-01), Iizumi
patent: 4415001 (1983-11-01), Kent
Hepperle Stephen M.
Legris SA
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