Shielding spiral conveyor hydraulic system with proportional feedback control and accumulator oil supplementary

Abstract

A hydraulic system of shield spiral conveying machine with ratio feedback control and energy storing device for oil supplement consists of a three-position and four-way solenoid change valve, a motor, a rotation sensor, a one-way valve, a liquid-controlled one-way valve, a throttle valve, a two-position and two-way solenoid reversal valve, a shift sensor, a hydraulic cylinder, a range switch, a stop ball valve, a unloading valve, an overflow valve and an energy storing device. The machine has a sensor to monitor rotation and makes variable pump controlled according soil cabin pressure so as to control soil discharge volume and to achieve a hydraulic control system of a continuous real time controllable spiral-conveying machine. The energy-storing device is used oil supplement to close exhaust outlet reliably when accident occurs to guarantee safety for tunnel engineering. The electric feedback and ratio feedback are used to control turbulence to soil body when shield tunneling and reduce settlement of earth surface. The machine can be adaptable for various strata reliably.

Description

Technical field [0001] The invention relates to a fluid pressure actuator, in particular to a shield screw conveyor hydraulic system with proportional feedback control and accumulator oil supplement. Background technique [0002] Shield is a technology-intensive major engineering equipment dedicated to the excavation of underground tunnels. Under the cover of a round, rectangular, and horseshoe-shaped steel tube structure that can not only support the formation pressure but also push through the formation, it can complete excavation, excavation, tunnel support and other tasks. Its biggest feature is that the entire tunneling process is completed under the cover of this steel structure called a shield, which can minimize collapse and surface deformation. Compared with traditional tunnel boring technology, shield construction has the advantages of safety and reliability, high degree of mechanization, good working environment, less earthwork, fast progress, and low construction cost...

AI Technical Summary

Problems solved by technology

Since the original stress of the soil layer on the excavation surface is relatively complex, the result of this presetting and lag adjustment will cause a large uplift or subsidence on the ground, and the effect of stratum stability and surface settlement control depends largely on the construction personnel Experience, construction quality is difficult to guarantee

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