| 摘要 |
<p>FIELD: construction. SUBSTANCE: pressure valve uses disbalance of pressure forces developed by flow for keeping the valve in open or closed state. The valve has inner hollow 15 which is entered by coaxial inlet channel 12 and outlet channel 14 located opposite to each other. Hollow accommodates bulb-shaped body 16 attached to rod 17 installed for reciprocation. Rod 17 passes through outlet channel. Displacement of body increases the cross-sectional area of flow at one end of body and reduces flow cross-sectional area at the other one. According to Bernoulli theorem, pressure acting on body 16 changes to result in development of resulting force acting on body. In the same manner, inlet valve of flush tank and flush tank itself are open. EFFECT: higher operating reliability, and reduced noise level. 18 cl, 13 dwgw</p> |
