Evacuation system provided with a shut-off valve, and process for maintaining in operating conditions a shut-off valve in a vaccum evacuation system
First Claim
1. A vacuum toilet discharge system provided with a shutoff valve which connects a toilet bowl with a waste water reservoir, said valve including a valve body (1) inside which is mounted a shutter member (2) which can be driven between an opening position and a closing position of the valve, wherein it includes unblocking means for the shutter member (2) of the valve, which act to cause a displacement of the shutter member between the closing position and an auxiliary position, and the subsequent return of the shutter member (2) to the closing position.
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Accused Products
Abstract
The toilet discharge system includes a valve with a body (1) and a shutter member (2), and an unblocking apparatus for the shutter member which acts to displace the shutter between the closing position and an auxiliary position and to return it subsequently to the closing position. Advantageously, the shutter member is a rotating element, and its displacement takes place along the direction of its rotation axis; the unblocking apparatus can include a pneumatic system which injects air into two chambers (6, 7) defined between the valve body (1) and the shutter member (2), on two opposite sides of the latter. The method of operation consists in submitting the shutter member of the valve to a cycle which includes a displacement between the closing position and an auxiliary position, and subsequent return to the closing position. The shutter member is thereby prevented from becoming blocked, by avoiding formation of scale of lime and the like, and lubrication and cleanliness of the valve are improved.
14 Citations
9 Claims
- 1. A vacuum toilet discharge system provided with a shutoff valve which connects a toilet bowl with a waste water reservoir, said valve including a valve body (1) inside which is mounted a shutter member (2) which can be driven between an opening position and a closing position of the valve, wherein it includes unblocking means for the shutter member (2) of the valve, which act to cause a displacement of the shutter member between the closing position and an auxiliary position, and the subsequent return of the shutter member (2) to the closing position.
- 7. A method for keeping operative a shutoff valve in a vacuum toilet discharge system, said valve including a valve body (1) inside which is a shutter member (2) which can be driven between an opening position and a closing position of the valve, wherein the shutter member (2) is submitted to a cycle which includes a displacement between the closing position and an auxiliary position, and a subsequent return to the closing position.
Specification