초록 ▼

In a sprinkler or spray nozzle for on-site fire-extinguishing systems provided with at least one intake opening (11) and with at least one outlet opening (16) downstream of the intake opening, and optionally provided with a downstream deflector, the outlet opening determining the flow of liquid of l

In a sprinkler or spray nozzle for on-site fire-extinguishing systems provided with at least one intake opening (11) and with at least one outlet opening (16) downstream of the intake opening, and optionally provided with a downstream deflector, the outlet opening determining the flow of liquid of liquid fire-extinguishing agent in accordance with the pressure on the agent, the improvement wherein the open cross-section of the intake opening is smaller to a prescribed extent than the open cross-section of the outlet opening, and the nozzle includes a connector with an open cross-section that initially tapers out like that of a diffuser from the intake opening toward the outlet opening over at least part of its length and then contracts into a constriction (9) positioned between the intake opening and its associated outlet opening.

대표청구항 ▼

In a sprinkler or spray nozzle for on-site fire-extinguishing systems provided with at least one intake opening (11) and with at least one outlet opening (6) downstream of the intake opening, and provided between the openings (11) and (6) with a connector with an open cross-section that initially ex

In a sprinkler or spray nozzle for on-site fire-extinguishing systems provided with at least one intake opening (11) and with at least one outlet opening (6) downstream of the intake opening, and provided between the openings (11) and (6) with a connector with an open cross-section that initially expands like that of a diffuser from the intake opening toward the outlet opening over at least part of its length and then contracts into a constriction (9) positioned between the intake opening and its associated outlet opening, the improvement wherein the open cross-section of the intake opening is smaller than the open cross-section of the outlet opening in such a way and that the initial expansion of the open cross-section of the connector like that of a diffuser is so formed that the pressure of an extinguisher fluid in the open cross-section of the intake opening decreases to the vapor pressure of the extinguisher fluid if the above atmospheric pressure of the extinguisher fluid exceeds a predetermined value so that at an above-atmospheric pressure of the actual extinguisher fluid from 0 bar to the predetermined value, the outflow rate Q of the sprinkler/nozzle will be determined by the formula [Figure] and at a higher above-atmospheric pressure of the extinguisher fluid by the formula [Figure] wherein Q=flow rate in liters per minute, K=flow rate in liters per minute at an above-atmospheric pressure of 1 bar, KS=flow rate in liters per minute at 1 bar of pressure drop between entry into and exit from the intake opening cross-section, and p=above-atmospheric pressure upstream of the sprinkler.