Low pressure actuator for dry sprinkler system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A62C-035/00
A62C-037/36
출원번호
US-0810723
(2001-03-16)
발명자
/ 주소
William Joseph Reilly
출원인 / 주소
Victaulic Company of America
대리인 / 주소
Synnestvedt & Lechner LLP
인용정보
피인용 횟수 :
5인용 특허 :
7
초록▼
A low pressure actuator for use in a dry, low-pressure, pressurized-gas, fire control and suppression sprinkler system for delivering an extinguishing liquid to a fire, wherein there is a system gas pressure of up to about 20 psi and an extinguishing liquid supply pressure of up to about 160 psi is
A low pressure actuator for use in a dry, low-pressure, pressurized-gas, fire control and suppression sprinkler system for delivering an extinguishing liquid to a fire, wherein there is a system gas pressure of up to about 20 psi and an extinguishing liquid supply pressure of up to about 160 psi is disclosed. When actuated by a rapid fall in the system gas pressure, the device allows liquid to flow through to a sprinkler check valve, which, in turn, is actuated and provides liquid flow for distribution through a piping system to a plurality of interconnected sprinklers. One preferred embodiment of the device includes a multi-chambered housing having a gas compartment and a liquid compartment; means for initially pressurizing the gas compartment; a first flexible and moveable diaphragm, acting as a gas-liquid barrier, with one side in fluid communication with gas and a second side in fluid communication with the liquid; a second flexible, moveable diaphragm, acting as a water flow barrier, such that when the device is in a closed, ready-condition, a first side of the second diaphragm is in a wet state, and a second side of the second diaphragm is in a dry state, in communication with the liquid outlet. When the device is in an actuated condition, both sides of the second diaphragm are in a wet state, in contact with the liquid. When gas pressure in the sprinkler system drops below a pre-determined set point, pressure equilibrium on the first diaphragm is upset causing the first diaphragm to move and allow a priming flow of liquid to the liquid outlet through a liquid by-pass, which is otherwise sealed when the first diaphragm is in a gas-liquid pressure equilibrium condition. This also simultaneously causes the second diaphragm to move and allow a greater flow of liquid to provide the main extinguishing liquid through to the liquid outlet.
대표청구항▼
1. A dry, low pressure, pressurized-gas, fire control and suppression sprinkler system for delivering an extinguishing liquid to a fire, wherein operating at a system gas pressure and a system extinguishing liquid supply pressure, the system comprising:a.) A low pressure actuator for actuating a che
1. A dry, low pressure, pressurized-gas, fire control and suppression sprinkler system for delivering an extinguishing liquid to a fire, wherein operating at a system gas pressure and a system extinguishing liquid supply pressure, the system comprising:a.) A low pressure actuator for actuating a check valve, the low pressure actuator being actuated by allowing liquid to flow through the low pressure actuator to the check valve when the system gas pressure falls to a pressure not greater than about 10 psi to, in turn, actuate the sprinkler check valve to provide liquid flow for distribution through a piping system to plurality of interconnected sprinklers, the low pressures actuator being maintained in a closed condition utilizing at least one flexible, moving diaphragm, wherein the system gas pressure is exerted on one side of the diaphragm and the system liquid supply pressure is exerted on an opposite side of the diaphragm, and where there is a mechanical advantage in a ratio of air pressure side actual diaphragm surface area to liquid pressure side effective diaphragm surface area of from about 4:1 to about 600:1 to enable an equilibrium to be maintained by a small system gas pressure side diaphragm effective surface area, regardless of the system liquid pressure; b.) a check valve connected to a plurality of sprinkler heads for distributing an extinguishing liquid to the plurality of sprinkler heads; c.) a plurality of sprinkler heads for delivering an extinguishing liquid to a fire; d.) piping for interconnecting the plurality of sprinkler heads, the low pressure actuator and the check valve; e.) a pressurized gas supply source for supplying a pressurized gas for circulation in the piping of the system when the system is in a non-activated condition, and to pressurize the low pressure actuator and the check valve; and f.) a pressurized extinguishing liquid supply source for supplying a pressurized liquid used to extinguish a fire to the system when the system when the system is in an activated condition and for pressurizing the low pressure actuator and the check valve when in a ready condition.
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이 특허에 인용된 특허 (7)
Reilly William Joseph ; Thomas Philip M., Actuator for check valve.
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