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33. 发明专利

GB1338556A ONCE-THROUGH VOILERS 未知
公开(公告)号：GB1338556A
公开(公告)日：1973-11-28
申请号：GB1338556D
申请日：1969-12-24
申请人： NUCLEAR POWER GROUP LTD
IPC分类号： F22D3/06 , F22D11/00 , G21D3/04 , F22B29/06 , F22D5/00 , F22D5/22
摘要： 1338556 "Once-through" boilers NUCLEAR POWER GROUP Ltd 17 Dec 1970 [24 Dec 1969] 62781/69 Heading F4A A "once through" boiler 1 is supplied with water by a pump 2. A storage drum 4, between a non-return valve 8 and an outlet 1b, contains a valve 5 which is closed by the action of a float 5a when the water reaches a predetermined level. Water rises in the drum 4 until the pressure drop across the valve 5 equals that across the boiler 1. In the event of a stoppage of the pump 2, the water level in the drum 4 falls thereby opening the valve 5 and causing a water flow into the boiler which is assisted by an auxiliary pump 9. In a modification. Fig. 2 (not shown), the valve 5 is omitted, the level of the float 5a regulating the speed of a continuously operated auxiliary pump 9.

40. 发明专利

GB190913205A Improvements in Feed-regulators for Steam Boilers. 未知
公开(公告)号：GB190913205A
公开(公告)日：1910-06-02
申请号：GB190913205D
申请日：1909-06-05
申请人： JOHNSTON JOHN
发明人： JOHNSTON JOHN
IPC分类号： F22D5/22
摘要： 13,205. Johnston, J. June 5. Feed - water, supplying and controlling. - Relates to float apparatus for controlling the supply of feed-water to a boiler. The float is contained in a chamber a, connected to the water-space of the boiler by a pipe c, and to the steam-space by a pipe d entering the chamber a at the normal water-level. The water enters the boiler by a pipe t fitted with an injector appliance s, which withdraws air and steam from the upper part of the chamber a. In consequence, when the opening of the pipe d is sealed by the rise of the water, the last few strokes of the feed-pump produce a partial vacuum in the upper part of the chamber a, thus retaining the water therein at a high level until the water-level in the boiler falls low enough to admit steam by the pipe d. The float is of the counterbalanced type, the upper float e being made of aluminium and the lower j, which has a dash-pot action in the lower part of the casing a, of lead. The two floats are connected by opposing levers, f, l, or by a chain passing over a pulley. The valve is operated from the pivot of the lever f or from the pulley.

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