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发明公开
CN103603841A 调平油缸液压控制系统以及消防车 有权

调平油缸液压控制系统以及消防车
摘要：
本发明公开了一种调平油缸液压控制系统，包括调平油缸（4）以及该调平油缸的主伸缩换向控制回路和手动伸缩换向控制回路，还包括切换控制阀（8），该切换控制阀（8）通过油量调节油路（20）连接于所述主回油油路（13）上，且该切换控制阀（8）通过第一分支回油油路（21）与所述手动泵油箱（7）连通，所述切换控制阀（8）能够选择性地控制为使得所述油量调节油路（20）与所述第一分支回油油路（21）连通或截止。在此基础上，本发明还公开了一种包括所述调平油缸液压控制系统的消防车。本发明的调平油缸液压控制系统能在手动泵油箱（7）内油液不足时，使主回油油路（13）内的液压油流回到所述手动泵油箱（7）进行补油。
摘要（英）：

The invention discloses a leveling oil cylinder hydraulic control system which comprises a leveling oil cylinder (4), a main telescopic reversing control loop of the leveling oil cylinder and a manual telescopic reversing control loop of the leveling oil cylinder and further comprises a switching control valve (8). The switching control valve (8) is connected to a main oil returning way (13) through an oil adjusting oil way (20), the switching control valve (8) is communicated with a manual pump oil tank (7) through a first branch oil returning way (21), and the switching control valve (8) can selectively control the oil adjusting oil way (20) and the first branch oil returning way (21) to be connected or disconnected. On the basis, the invention further discloses a fire fighting truck with the leveling oil cylinder hydraulic control system. According to the leveling oil cylinder hydraulic control system, when oil in the manual pump oil tank (7) is insufficient, hydraulic oil in the main oil returning way (13) flows back to the manual pump oil tank (7) for oil compensation.

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