| 摘要 |
<PICT:0984440/C1/1> <PICT:0984440/C1/2> A method of feeding liquid, particularly molten glass, from a parent supply body 11 thereof, comprises withdrawing liquid by suction from a submerged region of such body 11 through a metering tube 15, 16, 17 to a height above the top level of the supply body 11 so as to flow into a side entrance of a vertically disposed tube 18, the bottom end of which is submerged in a second supply 23 of the liquid, maintaining a desired head of the liquid within the lower part of tube 18 to give a uniform delivery rate from the lower end thereof, and varying the degree of suction applied to produce a desired flow rate through tube 15, 16, 17 to give the desired head of liquid within tube 18. The molten glass 11 is contained in a tank 10 with overflow pipe 13 and the metering tube 15, branched at 16, 17 to raise the tube above the glass line, extends through an extension 14 of the furnace 12, heated by an element 24. The tube 18 terminates in the molten glass 23 in a shallow container 19 from which the glass overflows into the delivery funnel 20. As shown in Fig. 3, an electrically-heated glass collector wire 21 may be secured to the end 22 of the funnel 20 for delivery of the liquid. The wire may be separate from the end 22. The top end of tube 18 is in communication with a vacuum source and the tube is provided with a valve 27 to be opened to atmosphere when the glass flow is to cease or for feeding glass intermittently. A needle valve 28 is provided to assist in maintaining the exact degree of suction for a desired rate of feed. |
