Each valve has a DC project are six kinds of running, were grounded, outage, standby, lockout, unlock and load boost. Control system through the inverter, circuit breakers, isolating switches and other equipment in the order control, to achieve conversion valve running operation.
2013年12月9日星期一
Cone valve stilling basin using turbulent jet turbulent diffusion to deliver energy and mass
Cone valve stilling basin using turbulent jet turbulent diffusion to deliver energy and mass , and ultimately achieve the purpose of energy dissipation . Cone valve has a simple structure , no moving parts, easy maintenance , good sealing and low flow can be precisely controlled a stream and a series of unique characteristics, so frequently used in low flow high head water works to improve conventional brake
High pressure ball valve control the flow of small, easy to cause vibration chamber is too small, inconvenient construction , aerated water gates and high-speed difficult to control and other shortcomings , but tapered cone valve so that water flows out to the edges along the stilling basin after the flow , water blending intense ,
Instrument valve manifolds flow , the flow field flow pattern is very complex, especially around the cone valve , water has obvious strong three-dimensional features. ejected flow hydraulics studies has been a research problem, and cone valve , etc. due to the limited complexity of the flow boundary conditions , water flow and a strong three-dimensional nature of modern testing methods for its pilot study , theoretical analysis more difficult. domestic applications is very limited, the project is also due to the imperfect information and its application is less , so the study of both the cone valve engineering applications or further developed in future flow flow pattern and energy dissipation characteristics are of great significance.
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