Media Coverage
Countermeasure of water hammer in pressure-reducing pipeline system using
surge relief valve
|
Transaction of the Japanese Society of Irrigation, Drainage and Reclamation
Engineering
No. 200, published on Apr. 25, 1999 |
|
|
|
|
Reprinted from Transaction of the Japanese Society of Irrigation, Drainage
and Reclamation Engineering No. 200 |
|
Countermeasure of water hammer in pressure-reducing pipeline system using
surge relief valve
|
|
Hitone Inagaki
|
|
Research Student of the United Graduate School of Agricultural Sciences,
Kagoshima University
|
|
Kunio Ogura
|
|
Yokota Mfg. Co., Ltd.
|
|
Noriaki Tsunoda
|
|
Crown Engineering Co., Ltd.
|
|
Fumiyoshi Kondo
|
|
Faculty of Agriculture, Miyazaki University
|
Abstract (Original text)
We conducted a field test on a pressure-reducing pipeline system equipped
with a new type of automatic control valves for field irrigation, and verified
its pressure reducing function, reproducing the results of measurement
by simulation using a mathematical model. The simulation of generating
status of water hammering pressure brought about by the operation of a
diversion device at the end of pipeline revealed that the rapid closeout
of the terminal valve propagated pressure wave upstream through the automatic
control valves. As a countermeasure for restraining the water hammering
pressure, the installation of a surge relief valve was studied. As a result,
it was found effective to install the surge relief valve at the end of
the pipeline for the downstream side of a pressure-reducing valve (automatic
control valve), and it was found effective to additionally install it at
the upstream side of a pressure-reducing valve. It was also found that
the size of the surge relief valve requires about the same level as the
main pipe in terms of diameter.
|
Key words:
|
Automatic control valve, Pressure-reducing pipeline system, Surge relief
valve, Mathematical model, Simulation
|
For details of this new type of automatic pressure control valve, please
refer to
Constant Pressure Valve UFSP type. |
