| 摘要 |
<p>A reciprocating plunger pump particularly adapted for the pumping of liquids has at least one pumping chamber and a plunger disposed for reciprocating movement therein, a common substantially integral inlet manifold for fluid to be pumped, a common integral outlet manifold for pumped fluid, and a valve assembly operatively associated and aligned with the pumping chamber and connected to the inlet manifold to receive the fluid to be pumped and to deliver the fluid to the pumping chamber, and operatively connected to the outlet manifold to pass the pumped fluid thereto. The valve assembly has cylindrical pressure containing parts including, a lower section, an intermediate section, and an upper section with a discharge passage extending end to end therethrough in the longitudinal axis of and in communication with the pumping chamber in the assembled position of the valve assembly. The intermediate section of the valve assembly has a two piece suction inlet assembly having a portion of the discharge passage in the axial line thereof forming a first port, and the suction inlet assembly is mounted so as to define suction inlet passages, a second port as a suction inlet, and a suction inlet valve seat, all disposed concentric, parallel and radially outward of the discharge passage. The lower section has an inlet chamber and a spring loaded valve head is disposed in the inlet chamber for engagement with the suction inlet valve seat to maintain the suction inlet valve port normally closed and the valve head is movable from closed to open position responsive to movement of the plunger in the pumping chamber. The upper section has the discharge outlet assembly mounted therein remote from and independent of the suction inlet assembly to provide a discharge valve port having a discharge valve seat and a spring loaded discharge valve head is operative to engage the discharge valve seat to maintain the discharge port normally closed and is also movable to open position on movement of the plunger. The suction inlet assembly and discharge outlet assembly respectively are taper driven for mounting the same in the valve assembly and their structure and assembly permit relatively easy repair thereof in the event of failure, and respectively the gasketing thereof against the high pressures acting in the fluid being pumped.</p> |
