Method for water hammerless opening of fluid passage, and method for supplying chemical solutions and device for water hammerless opening for which the method is used
US8047225B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 10, 2009 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Sep 19, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86461
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The water hammerless opening device comprises an actuator operating type valve installed on the fluid passage, an electro-pneumatic conversion device to supply the 2-step actuator operating pressure Pa to the afore-mentioned actuator operating type valve, a vibration sensor removably fixed to the pipe passage on the upstream side of the actuator operating type valve, and a tuning box to which the vibration detecting signal Pr detected by the vibration sensor is inputted, through which the control signal Sc to control the step operating pressure Ps′ of the afore-mentioned 2-step actuator operating pressure Pa is outputted to the electro-pneumatic conversion device, and with which the 2-step actuator operating pressure Pa, of the step operating pressure Ps′ which makes the vibration detecting signal Pr nearly zero, is outputted from the electro-pneumatic conversion by adjusting the control signal Sc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.