| 摘要 |
<p>962,916. Steam traps. NUQUIP Ltd., and C. D. P. SMALLPEICE. Feb. 5, 1962 [Feb. 28, 1961], No. 7212/61. Heading F4U. [Also in Division F2] A float chamber is formed by a tubular body 11 to which end caps are fitted by internal bolts 16 which act as guides for a float 28. The chamber has an inlet 19 with radial discharge ports 21 adjacent a filter 24, and a drain outlet 27 embodying a seat for a closure member 37 attached to the underside of the float. The float may be in the form of a bottle or ball, the neck of which is provided with a screw cap 32 through which extends a hollow stem 33 opening into a tube 34 that depends into the float; the chamber communicates with the stem 33 via radial ports 36 shrouded by a headmember 35. The float is made of very thin metal or resilient plastic. Vapour, e.g. wet steam or compressed air enters the inlet 19 and the liquid part thereof settles in the bottom of the chamber and eventually causes the float to rise and open the outlet 27 whereupon the gas pressure discharges the liquid through the outlet 27. Concomitantly the gas in the chamber enters the float by the ports 36 so pressure balancing the float to avoid collapse of its walls. The head member 35 tends to prevent suspended liquid entering the float; if this should occur, then upon the end of the tube 34 being covered by this liquid the latter will be discharged into the chamber when the pressure therein falls below that in the float. Liquid in the chamber below the seat in the outlet 27 may be drained by a manually-actuated valve. To provide for pressure equalization across the float walls in the event of a rapid pressure increase in the vapour, the float shoulder embodies a spring-loaded flap valve.</p> |
