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1. 发明授权

US4314502A Safety control system for double-acting cylinder 失效
标题翻译：双作用气缸安全控制系统
公开(公告)号：US4314502A
公开(公告)日：1982-02-09
申请号：US3411
申请日：1979-01-15
申请人： Edwin P. Brinkel , Philip J. Dellach
发明人： Edwin P. Brinkel , Philip J. Dellach
IPC分类号： F15B20/00 , F15B13/042
CPC分类号： F15B20/00
摘要： In combination with a double-acting cylinder having pressure and exhaust ports, a cylinder control valve having a spool having a pair of control positions with pressure, cylinder and exhaust ports, and conduits between the valve cylinder ports and cylinder ports, and a source of compressed air connected to the valve pressure port, a safety control system which comprises a pilot-operated valve housing having a pressure port connected to the source of compressed air, a pilot port and a pair of cylinder ports connected to the cylinder conduits. A valve spool within said housing has first and second control positions with an operative device on the housing which normally biases the safety valve spool to a first control position pressurizing opposite ends of the cylinder and with the pilot port connected to the source of compressed air. A build up of pressure to the pilot port moves the safety valve spool to its second control position, blocking communication between the safety valve and the cylinder ports. The spool of the cylinder control valve has a normal central position blocking the conduits to the cylinder assembly ports. The safety valve spool is adapted to automatically return to its first position on disconnecting pressure from said pressure source, bleeding opposite ends of the cylinder.
摘要翻译：与具有压力和排气口的双作用气缸组合，一个气缸控制阀，其具有一个带有压力，气缸和排气口的一对控制位置的阀芯以及阀气缸端口和气缸端口之间的导管，连接到阀压力端口的压缩空气，安全控制系统，其包括具有连接到压缩空气源的压力端口的先导操作阀壳体，连接到气缸导管的先导端口和一对气缸端口。所述壳体内的阀芯具有第一和第二控制位置，在壳体上具有操作装置，该操作装置通常将安全阀阀芯偏压到对气缸的相对端加压的第一控制位置，以及连接到压缩空气源的先导端口。对先导口的压力的积累将安全阀阀芯移动到其第二控制位置，阻止安全阀和气缸端口之间的连通。气缸控制阀的阀芯具有阻挡到气缸组件端口的导管的正常中心位置。安全阀阀芯适于在与所述压力源断开压力时自动返回到其第一位置，使气缸的相对端出血。

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