Automated drain valve with internal reset
a drain valve and automatic technology, applied in the direction of valves, service pipes, mechanical equipment, etc., can solve the problems of difficult reset at a target temperature range, inconsistent and unreliable workarounds, and large dust and debris accumulation
Active Publication Date: 2020-05-21
THERM OMEGA TECH INC
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
Enables reliable and consistent reset of the valve at cold temperatures without external assistance, preventing cartridge ejection and ensuring the valve returns to its operating configuration upon warming, thus providing effective freeze protection without interference from environmental debris.
Problems solved by technology
A disadvantage of the prior art drain valves is that they are difficult to reset at a target temperature range, e.g. in cold temperatures, and additional measures are needed to retain the valve cartridge in the ejector cap.
These workarounds are inconsistent and unreliable and require a supply of pennies or maintenance of external override slots that can be fouled by dirt or debris in normal operation.
Where the drain valve is used on a low point of a water cooling system of a locomotive, for example, extensive entrained dust and debris is encountered.
User modification and workarounds often interfere with the operation of the cartridge.
Method used
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Embodiment Construction
[0024]Reference will now be made in detail to the presently preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
[0025]The present inventive concept relates to an automated drain valve that is thermally responsive, and an embodiment that comprises a retaining mechanism to eject a cartridge upon reaching a target temperature. A latching cartridge can be combined with an ejector cap to fluid seal a system during operation and drain the system upon ejection. A cartridge is disclosed that provides a manual cold reset that can be used to facilitate latching connection between the cartridge and the ejector cap and reset the drain valve operation.
[0026]FIG. 1 presents a side view of a cartridge 10 in an embodiment of the invention. The body 40 is shown with first retention ball 46 protruding from the body 40. Third retention ball 48 can be positioned opposite first retention...
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An automated thermally responsive valve with an internal reset function is disclosed. The cartridge latching mechanism can be retracted at a target temperature and manually reset at the target temperature to engage an ejector cap. The reset mechanism of the cartridge automatically returns to a latching configuration upon warming. The cartridge thermal actuator can be configured to retract the latching mechanism at a target temperature near freezing to provide a freeze protection drain valve that is ejected from a sealing element in the ejector cap and allows a fluid system to drain.
Description
BACKGROUND OF THE INVENTIONField of the Invention[0001]The present general inventive concept is directed to an automated drain valve that automatically opens upon reaching a target temperature to vent a system, can be reset when the system is at the target temperature, and can automatically revert to an operating configuration when the system moves outside of a target temperature range. The automated drain valve can provide freeze protection where the target temperature is selected near freezing temperatures.Description of the Related Art[0002]Freeze protection valves or drain-type valves are known in the art. U.S. Pat. No. 6,029,686 is directed to a thermally responsive valve. U.S. Pat. No. 6,325,092 is directed to a thermally responsive valve. These valves provided freeze protection and can open a system to drain at cold temperatures by ejecting a valve cartridge from a plug position in an ejector cap. A disadvantage of the prior art drain valves is that they are difficult to rese...
Claims
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IPC IPC(8): F16K31/00F16K31/56
CPCF16K31/002F16K31/56E03B7/10
InventorNEGOVAN, ALEXANDER LEE
OwnerTHERM OMEGA TECH INC