To provide a gas pressure monitoring device enabling to relax traffic control and reduce construction cost by reducing a gas pipe construction region on a road, and to provide a gas grid constructing method.
The gas pressure monitoring device 10 includes a bypass pipe 21 connected at both ends to a pair of gas pipe terminal portions 47, 47 on both sides of a shut-off part 46 of a gas grid 50. A normally-closed manual valve 24 and a motor driven valve 25 are arranged in parallel to each other on the midway of the bypass pipe 21. A pair of pressure sensors 27, 27 detect gas pressure in the pair of gas pipe terminal portions 47, 47. When the gas pressure in one of them is lower than a predetermined reference value, the motor driven valve 25 is opened to open the bypass pipe 21.
SUDO KEIJI
OKAWA KAZUYA
SEIBU GAS CO LTD
| JP2005265081A | 2005-09-29 | |||
| JP2005233306A | 2005-09-02 | |||
| JP2003090777A | 2003-03-28 | |||
| JP2000161600A | 2000-06-16 |