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

A shield screw and hydraulic system technology, applied in the direction of fluid pressure actuation system safety, mechanical equipment, fluid pressure actuation devices, etc., can solve the problems of difficult construction quality assurance, complex original stress, etc., to reduce surface deformation, High system reliability and safe effect

Inactive Publication Date: 2007-02-14
ZHEJIANG UNIV
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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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  • Shielding spiral conveyor hydraulic system with proportional feedback control and accumulator oil supplementary

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Embodiment Construction

[0014] As shown in the drawings, the present invention includes two three-position four-way electromagnetic reversing valves 1, 5, a motor 2, a rotational speed sensor 3, a one-way valve 4, a throttle valve 6, and two hydraulically controlled one-way valves 7, 9 , Two-position two-way electromagnetic reversing valve 8, hydraulic cylinder 10, displacement sensor 11, travel switch 12, globe valve 13, unloading ball valve 14, overflow valve 15, accumulator 16. Oil inlet P of the first three-position four-way electromagnetic reversing valve 1 1 Respectively with the oil inlet P of the second three-position four-way electromagnetic reversing valve 5 2 , Oil inlet A of check valve 4 5 Connected; the oil return port T of the first three-position four-way electromagnetic reversing valve 1 1 Respectively with the oil return port T of the second three-position four-way electromagnetic reversing valve 5 2 , Oil return port T of unloading ball valve 14 3 , Oil return port T of relief ...

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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 replenishment. Background technique [0002] Shield tunneling is a technology-intensive major engineering equipment dedicated to the excavation of underground tunnels. Under the cover of a circular or rectangular and horseshoe-shaped steel cylinder structure that can support formation pressure and advance in the formation, it can complete excavation, excavation, tunnel support and other work. 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 the traditional tunneling technology, the shield tunneling method has the advantages of safety, reliability, high degree of mechanization, good working environment, less earthwork, fast progress, and low constr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/00F15B11/05F15B11/08F15B20/00E21D9/13
Inventor 龚国芳胡国良杨华勇
Owner ZHEJIANG UNIV
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