JP2009264758A5 - - Google Patents

Claims (6)

  A valve body comprising a shaft portion having first and second valve portions having a circular cross section arranged at intervals, and a housing having a cylindrical inner space that covers the valve body, Two through holes are formed for each of the first and second valve portions, each of the first and second valve portions is provided with a through hole communicating with the through hole of the housing, and the first The valve portion is provided with first, second, and third cut portions that communicate with the through hole and communicate with the interior of the housing, and the second valve portion communicates with the through hole and the housing. Provided with fourth and fifth cut portions communicating with each other, and the valve body is capable of rotating to the first to third rotation operation positions around the shaft portion with respect to the housing, Two said through holes for each of the first and second valve portions at the first rotation operation position of the valve body The first and second cut portions of the first valve portion correspond to the first and second cut portions at the second rotational operation position of the valve body, which coincides with the inlet / outlet portion of each of the through holes of the valve portion. Each of the second valve portions corresponds to one of the two through-holes, and the fourth cut portion of the second valve portion corresponds to one of the two through-holes to the second valve portion. The first, second, and fourth cut portions communicate with each other inside the housing, and the third valve of the first valve portion is in the third rotation operation position of the valve body. A notch part corresponds to one of the two through holes for the first valve part, and the fifth notch part of the second valve part corresponds to the two valve parts for the second valve part. The third cut portion of the through hole coincides with the through hole on the side where the third cut portion communicates, and the third and fifth cut portions are located inside the housing. Differential pressure flow meter for three-way valve manifold, characterized in that communicate with each other.   The three-way valve for a differential pressure flow meter according to claim 1, wherein the first and second valve portions are spherical.   2. The three-way valve for a differential pressure flow meter according to claim 1, wherein a seal member for the surfaces of the first and second valve portions is disposed at an inlet portion of each through hole facing the internal space. The three-way valve for a differential pressure flow meter according to any one of claims 1 to 3, wherein an operation member for a rotation operation is provided on the valve body. The difference according to any one of claims 1 to 4, further comprising a mechanism for locking the rotation of the valve body at the first, second, and third rotation operation positions. Sanki valve for pressure flow meter. The first rotation operation position of the valve body is for introducing flow measurement pressures to the two pressure receiving portions of the differential pressure transmitter, respectively, and the second rotation operation position is 2 of the differential pressure transmitter. This is because the pressure in the equalized state is introduced to two pressure receiving portions, and the third rotation operation position is for introducing the same pressure from the pipe to the two pressure receiving portions of the differential pressure transmitter. The three-way valve for a differential pressure flow meter according to any one of claims 1 to 5 .