IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0375174
(2006-07-28)
|
등록번호 |
US-8162002
(2012-04-24)
|
국제출원번호 |
PCT/IT2006/000589
(2006-07-28)
|
§371/§102 date |
20090126
(20090126)
|
국제공개번호 |
WO2008/012849
(2008-01-31)
|
발명자
/ 주소 |
- Pavin, Federico
- Benvenuto, Michele
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
33 인용 특허 :
4 |
초록
▼
A device for controlling the delivery of a combustible gas to a burner apparatus is provided including a main gas-delivery duct in which there is at least one servo-assisted diaphragm valve including a valve seat associated with a corresponding closure member with diaphragm control for opening the s
A device for controlling the delivery of a combustible gas to a burner apparatus is provided including a main gas-delivery duct in which there is at least one servo-assisted diaphragm valve including a valve seat associated with a corresponding closure member with diaphragm control for opening the seat against the action of a resilient biasing member. The diaphragm valve includes a respective control solenoid valve with an electromagnetic operator for controlling the corresponding valve, the solenoid valve being arranged to bring about the opening/closure of a duct of a respective servo-assisted control circuit so as to operate the closure member of the valve indirectly, by the diaphragm control. The duct of the control circuit putting a portion of the main duct that is disposed upstream of the valve seat with respect to the direction of the gas-flow into flow communication with a respective control chamber of the diaphragm valve.
대표청구항
▼
1. A device for controlling the delivery of a combustible gas to a burner apparatus, comprising a main gas-delivery duct (2) in which there is at least one servo-assisted diaphragm valve (5) including a valve seat (5a) associated with a corresponding closure member (5b) with diaphragm control (6) fo
1. A device for controlling the delivery of a combustible gas to a burner apparatus, comprising a main gas-delivery duct (2) in which there is at least one servo-assisted diaphragm valve (5) including a valve seat (5a) associated with a corresponding closure member (5b) with diaphragm control (6) for opening the seat against the action of a resilient biasing member (7), the diaphragm valve (5) comprising a respective control solenoid valve (8) with an electromagnetic operator for controlling the opening/closure of the corresponding valve (5), the solenoid valve being arranged to bring about the opening/closure of a duct (9) of a respective servo-assisted control circuit so as to operate the closure member (5b) of the valve (5) indirectly, by the diaphragm control, the duct of the control circuit putting a portion of the main duct (2) that is disposed upstream of the valve seat (5a) with respect to a direction of the gas-flow into flow communication with a respective control chamber (10) of the diaphragm valve, a first side (6a) of the diaphragm (6) of the diaphragm control being subjected to the pressure existing in the respective control chamber (10), the second, opposite side (6b) of the diaphragm (6) delimits a space (21) which is separated from the portion of the main duct (2) that extends downstream of the valve seat so that the second side (6b) of the diaphragm is not subjected to the delivery pressure of the gas that is present in the duct portion, downstream of the valve seat (5a); wherein a second diaphragm (24) and the closure member (5b) have respective facing sides which have respective surface extensions that are substantially equivalent to one another so as to render the resultant of stresses generated in the device by the pressures acting on the facing sides of the closure member and of the second diaphragm generally such as to have no effect or even to be zero. 2. A device according to claim 1, wherein the space delimited by the second, opposite side (6b) of the diaphragm defines a second chamber (21) which is open to the exterior so that the second side (6b) of the diaphragm is subjected to atmospheric pressure. 3. A device according to claim 2, wherein the second chamber (21) comprises, on a side remote from the diaphragm (6), a wall (22) through which a rod (11) extends for the control of the closure member (5b), the rod (11) having a first end fixed firmly to the closure member and a second, opposite end that can contact the control diaphragm (6). 4. A device according to claim 3, wherein the second, flexible diaphragm (24), fixed firmly to the rod (11), is mounted on the wall (22) so as to permit an axial movement of the rod during the operative travel of the closure member (5b) for the opening/closure of the seat (5a). 5. A device according to Claim 1, wherein the facing sides of the closure member (5b) and of the second diaphragm (24), respectively, are subjected to the delivery pressure of the gas through the device. 6. A device according to claim 4, wherein the rod (11) for operating the closure member (5b) extends through the second diaphragm (24). 7. A device according to claim 1, wherein the biasing member comprises a spring (7) acting directly on the closure member (5b) in order to urge it towards the shut-off position. 8. A device according to claim 1, wherein the portion of the duct (9) of the control circuit that extends between the solenoid valve (8) and the control chamber (10) is connected to a pilot duct (14) for the supply of gas to a respective pilot burner. 9. A device according to claim 1, wherein the first side (6a) of the diaphragm (6) delimiting the control chamber (10) is subjected to the gas-supply pressure gas through the main duct (2). 10. A device according to claim 1, further comprising a delivery-pressure regulator member (20) in the duct (2), downstream of the valve seat (5a). 11. A device according to claim 10 wherein the regulator member (20) comprises a second diaphragm servo-valve (25) arranged in series with the diaphragm valve (5) with respect to the direction of the gas-flow, the second servo-valve (25) including a diaphragm pressure regulator (30). 12. A device according to claim 11 in which the second servo-valve (25) comprises a respective second control solenoid valve (29) with an electromagnetic operator for controlling the opening/closure of the second servo-valve (25), the second solenoid-valve being arranged to act so as to open/close a duct (28) of a respective servo-assisted control circuit (28, 32) so as to operate the closure member (25b) of the servo-valve (25) indirectly by the diaphragm control. 13. A device according to claim 12, wherein both of the ducts (9, 28) for tapping off the control pressures of the respective control circuits, which ducts can tap off a pressure signal for transfer to the corresponding control chambers (10, 32), are connected to and in flow communication with the main duct (2) upstream of the first valve (5). 14. A device according to claim 12, wherein a control-pressure tapping duct (28), of the corresponding control circuit, which duct can tap off the pressure signal for transfer to the respective control chamber (32), is connected to and in flow communication with a portion of the main duct that is disposed between the valve seats (5a, 25a) of the respective valves (5, 25). 15. A device according to claim 11, wherein the diaphragm pressure regulator (30) is disposed in a portion (35) of duct of the control circuit of the second servo-valve (25) which extends between the corresponding control chamber (32) of the second servo-valve (25) and a portion of the main duct (2) downstream of the second servo-valve (25).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.