Fluid handling – With indicator – register – recorder – alarm or inspection means – Fluid pressure responsive indicator – recorder or alarm
Patent
1991-09-06
1993-12-14
Rivell, John
Fluid handling
With indicator, register, recorder, alarm or inspection means
Fluid pressure responsive indicator, recorder or alarm
137559, 137599, 251206, 251208, 251315R, 73168, 7386174, F16K 3700
Patent
active
052693449
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE PRESENT INVENTION
The present invention relates generally to valves and more particularly relates to valve arrangements for use in supplying water to fire suppression systems and for use in testing and draining fire suppression water sprinkler systems. The present invention also relates generally to flow switches and more particularly relates to flow switches used in connection with fire suppression water sprinkler systems.
In a typical fire suppression water sprinkler system as installed in many buildings, an array of individual fire sprinklers is supplied with water through a main conduit and various branch conduits. The individual fire sprinklers are generally provided with a member that melts when the ambient temperature reaches a predetermined level indicative of a fire. The melting of the member opens a fire sprinkler to spray water in order to suppress the fire. The individual fire sprinklers are provided with meltable members so that the spray of water will hopefully be limited to the region of the building where the fire is present. In this way, the extent of water damage may be minimized.
After a fire, and especially during maintenance and renovation, it may become necessary to replace one or more of the individual water sprinklers. At such times it is desirable to be able to drain the system of water conduits, so that the removal of one or more of the individual water sprinklers (after the supply of water to the main conduit has been turned off) will not result in a flow of water through the fitting for the water sprinkler. Accordingly, it is conventional in the art to provide a valve which when opened will drain the water conduits of the system downstream of the main conduit.
Such fire suppression systems also oftentimes have a switch or sensor that detects the flow of water in the conduits to indicate that even only one of the individual water sprinklers has opened. Since the flow of water in the conduits generally means that a fire is present in the building, the switch or sensor typically triggers a fire alarm or sends an appropriate signal directly to a fire department. Therefore, many fire codes require, and it is otherwise desirable, that the switch or sensor which detects the flow of water in the conduits be periodically tested. Accordingly, it has also become conventional in the art to provide a valve which enables the system to be tested by permitting a flow of water corresponding to the flow through only one individual water sprinkler that has been opened.
In addition, it is desirable (and sometimes required by the applicable fire code) to be able to visually observe the flow of water from the testing valve. Since the testing valve (and oftentimes the drainage valve) is frequently connected directly to a drain pipe, it is conventional to provide a sight glass downstream of the testing valve (and sometimes downstream of the drainage valve) . It is, of course, possible to alternatively place a sight glass upstream of the testing valve. Also, since it is typically desirable to determine the pressure of the water upstream of the testing valve, prior to and during a test operation, it is conventional to provide a fitting or port to receive a pressure gauge upstream of the testing valve.
The use of a separate supply valve and a separate testing and drainage valve results in significant time and expense during installation which can be obviated by the present invention.
Likewise, the use of a separate flow sensor typically downstream of the supply valve (especially together with a separate testing and drainage valve) in a fire suppression water sprinkler system results in significant time and expense during installation which can be minimized by the present invention. Moreover, to provide a flow sensor generally in a conduit results in additional time and expense due to the expense of an appropriate fitting and the need to install the fitting in the conduit which can be minimized by the present invention.
Accordingly, it is an object of the present invention to
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Brochur
AGF Manufacturing, Inc.
Rivell John
LandOfFree
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