Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1998-03-12
1999-12-21
Ferensic, Denise L.
Fluid handling
Systems
Flow path with serial valves and/or closures
137613, 7386152, 7386301, G01F 100, F17C 1300
Patent
active
060035498
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a flow measuring device, especially for coolant guided through injection molds.
Flow measuring devices are always required when the quantity of flow of a fluid through an apparatus, for example the quantity of a coolant through an injection mold, is to be controlled or regulated.
Commercially available flow measuring devices for coolant guided through injection molds have a complicated construction, have an impractical construction with respect to their various connections, and require separate controls for a generally available shut-off valve, which is disposed upstream of the injection mold, and for a flow control valve, which is disposed downstream of a flow meter that is a part of the flow control valve.
It is therefore an object of the present invention to provide a flow measuring device that has a simple and easy to understand construction, the connections of which are grouped in a logical and space-saving manner and require no separate control of the valves that are present on the flow measuring device.
SUMMARY OF THE INVENTION
Starting from this objective it is proposed with a flow measuring device of the aforementioned type having a coolant inlet and a coolant outlet to the injection mold that pursuant to the present invention there be provided a shut-off valve between the coolant inlet and the coolant outlet, a flow meter having an inlet for coolant coming from the injection mold and an outlet adjacent the coolant inlet, a flow control valve ahead of the outlet that is adjacent to the coolant inlet, and a common control means or mechanism for the shut-off valve and the flow control valve. In this connection, the coolant inlet can preferably be disposed adjacent to the outlet, the shut-off valve adjacent to the flow control valve, and the common control mechanism in or on a valve block.
In this way, the connections for the coolant are disposed very close to one another on the valve block, so that in a logical and space-saving manner the connection to a coolant supply line, a coolant return line, a connecting line from the valve block to an injection mold, and a return line from the injection mold can be established in a simple manner.
It is particularly advantageous if the coolant inlet and the outlet disposed adjacent thereto be disposed in the valve block as parallel through-bores that extend from one side face to the parallel other side face, since then several valve blocks having aligned and sealed bores can be bolted together at their adjoining side faces.
From each of these bores, respective parallel bores can branch off perpendicularly, with one leading to the coolant inlet and the other establishing the connection to the flow meter and accommodating the shut-off valve and the flow control valve, which are preferably disposed coaxially on a shaft that is perpendicular to the bores.
The flow meter can preferably be a float element flow meter having a conical, vertical tube that at least in a portion as viewed in the longitudinal direction is transparent and graduated, with a float element being disposed in the tube; the upper end of the tube is disposed in a sealed manner in the valve block ahead of the flow control valve, and the lower end is detachably held by a carrier that is connected to the valve block, with the inlet for the coolant that comes from the injection mold being disposed directly at the lower end of the tube.
A particularly straightforward and easy to seal off embodiment of the shut-off valve and of the flow control valve can have coaxially disposed, rotatable plugs, whereby for better control of the fluid flow through the flow control valve, the flow cross-section of the shut-off valve can be greater than that of the flow control valve.
In addition to this measure, or in place of the different flow cross sections, is also possible for the opening cross-section of the shut-off valve to increase more rapidly than does that of the flow control valve upon actuation of the common control mechanism.
The simplest co
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Delcroix Jean-Louis
Renahy Xavier
Ferensic Denise L.
Kim Joanne Y.
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