Forklift hydraulic system matched with multi-functional wet brakes

The invention relates to a forklift hydraulic system matched with multi-functional wet brakes. The system comprises an oil pump, a preferred diverter valve, an integrated valve block, an energy accumulator, a power brake valve, a parking brake, a service brake and an oil tank, wherein the oil outlet of the oil pump is communicated with a port P of the preferred diverter valve; the preferred diverter valve is provided with an inlet and three outlets, wherein the first outlet is divided into two paths, one path is communicated with a port P1 of the integrated valve block, and the other path is communicated with a port Pz of the power brake valve; the second outlet is communicated with an oil circuit of a forklift operating device; the third outlet is divided into two paths, one path is communicated with a forklift steering system, and the other path is communicated with a port P2 of the integrated valve block; and the integrated valve block comprises a parking brake electromagnetic valve, a one-way valve, a lock/release electromagnetic valve, a one-way valve, and the like. In the invention, the preferred diverter valve is used for diverting, and the problem of oil sources for wet bridge parking braking and service braking can be solved without providing another set of oil source, so that an operating hydraulic system and a brake system are integrated into an organic whole, thereby simplifying the piping system and reducing the cost.