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公开(公告)号：US20150096619A1
公开(公告)日：2015-04-09
申请号：US14046328
申请日：2013-10-04
发明人： Jason Greenwood , Matthew J. Rades , Susan Kelpin
CPC分类号： F15B13/0433 , F15B13/015 , F15B13/021 , F15B2211/353 , Y10T137/0318 , Y10T137/86879
摘要： An apparatus has a pilot-operated spool valve connecting first and second work passages selectively to a supply conduit and a tank conduit. A first check valve normally allows fluid flow only in one direction from the first work passage to a first workport and when pilot-operated allows bidirectional fluid flow. A second check valve normally allows fluid flow only from the second work passage to a second workport and when pilot-operated allows bidirectional fluid flow. A first pilot valve selectively applies pressure to one end of the spool and to pilot operate the first check valve. A second pilot valve selectively applies pressure to another end of the spool and to pilot operate the second check valve. When fluid drains from a workport to the tank conduit, the associated check valve operates to maintain a predefined pressure in the first or second work passage through which that fluid flows.
摘要翻译： 一种装置具有先导操作的滑阀，其将第一和第二工作通道选择性地连接到供应管道和罐管道。 第一止回阀通常允许仅在从第一工作通道到第一工作端口的一个方向上流体流动，并且当先导操作允许双向流体流动时。 第二止回阀通常仅允许流体从第二工作通道流到第二工作端口，并且当先导操作允许双向流体流动时。 第一先导阀选择性地向阀芯的一端施加压力，并且先导操作第一止回阀。 第二先导阀选择性地向阀芯的另一端施加压力，并且先导操作第二止回阀。 当流体从工作口排出到罐管道时，相关联的止回阀操作以在第一或第二工作通道中维持预定的压力，通过该流体流动。
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公开(公告)号：US09476432B2
公开(公告)日：2016-10-25
申请号：US14046328
申请日：2013-10-04
发明人： Jason Greenwood , Matthew J. Rades , Susan Kelpin
IPC分类号： F15B13/043 , F15B13/01 , F15B13/02
CPC分类号： F15B13/0433 , F15B13/015 , F15B13/021 , F15B2211/353 , Y10T137/0318 , Y10T137/86879
摘要： An apparatus has a pilot-operated spool valve connecting first and second work passages selectively to a supply conduit and a tank conduit. A first check valve normally allows fluid flow only in one direction from the first work passage to a first workport and when pilot-operated allows bidirectional fluid flow. A second check valve normally allows fluid flow only from the second work passage to a second workport and when pilot-operated allows bidirectional fluid flow. A first pilot valve selectively applies pressure to one end of the spool and to pilot operate the first check valve. A second pilot valve selectively applies pressure to another end of the spool and to pilot operate the second check valve. When fluid drains from a workport to the tank conduit, the associated check valve operates to maintain a predefined pressure in the first or second work passage through which that fluid flows.
摘要翻译： 一种装置具有先导操作的滑阀，其将第一和第二工作通道选择性地连接到供应管道和罐管道。 第一止回阀通常允许仅在从第一工作通道到第一工作端口的一个方向上流体流动，并且当先导操作允许双向流体流动时。 第二止回阀通常仅允许流体从第二工作通道流到第二工作端口，并且当先导操作允许双向流体流动时。 第一先导阀选择性地向阀芯的一端施加压力，并且先导操作第一止回阀。 第二先导阀选择性地向阀芯的另一端施加压力，并且先导操作第二止回阀。 当流体从工作口排出到罐管道时，相关联的止回阀操作以在第一或第二工作通道中保持预定的压力，通过该流体流动。
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