| 摘要 |
<p>The invention relates to a bellows gas meter having an inlet (2), an outlet (3) and an inner housing (5) with two chambers, which are each divided into two measuring spaces (8) by a diaphragm (7), and having a valve device (4) by means of which the measuring spaces (8) are connected to the inlet (2) and outlet (3) in a manner which alternates in dependence on the diaphragm displacement, it being possible for the phase-displaced movement of the two diaphragms (7) to be transmitted to a measuring unit (6). In this case, the valve device (4), on the inlet and outlet sides, has in each case two pairs of openings (20a, 21a, 20a, 21b) which are arranged radially one behind the other in a circle-sector region, lead to the two respective measuring spaces (8) of a chamber and are located in a rotatable inlet-side and a rotatable outlet-side valve plate (18, 23) which, located opposite one another in relation to the respective axis of rotation (17) of the valve plate (18, 23), has an opening (20a, 20b) adjacent to the outer border and an opening (21a, 21b) adjacent to the axis of rotation (17), the two valve plates (18, 23), which are offset through 180° in respect of their openings (20a, 21a, 20b, 21b), being coupled to one another in a rotatable manner, it being possible for the inlet-side valve plate (18) to be rotated in circulation in accordance with the diaphragm displacement, and the opening region of the openings (20a, 21a, 20b, 21b) of the valve plates (18, 23) extending in each case over approximately 90°.</p> |
