A kind of hydraulic system of double-layer clamping box of pile driver

Abstract

The present invention provides a hydraulic system of double-layer clamping boxes for a pile driver, which includes an upper layer clamping box oil cylinder, a lower layer clamping box oil cylinder, an operation valve 1, an operation valve 2, a hydraulic lock 1, a hydraulic lock 2, and a one-way valve. , one-way valve two, hydraulic control valve one, hydraulic control valve two, shuttle valve one and shuttle valve two; the upper pile clamp box oil cylinder and operation valve one pass through the oil circuit L 1 with oil circuit M 1 Connection, the oil cylinder of the lower pile pile box and the operation valve 2 pass through the oil circuit L 2 with oil circuit M 2 Connection; oil circuit M 1 and oil circuit L 2 There are oil passage N, oil passage Q and oil passage L connected between them. 1 with oil circuit M 2 An oil passage R and an oil passage S are connected between them, the first shuttle valve is arranged on the oil passage S, and the second shuttle valve is arranged on the oil passage Q. According to the invention, when only the upper or lower pile clamping oil cylinder is operated to clamp, the other oil cylinder will be automatically released, which can effectively avoid the risk of damage to the pile clamping box caused by misoperation, and will not affect other working conditions. Normal operation, simplified operation and improved efficiency.

Description

technical field [0001] The invention relates to a hydraulic system of a pile driver, in particular to a hydraulic system of double-layer clamping boxes of a pile driver. Background technique [0002] Due to simple equipment, convenient construction, simple operation, low cost, and short construction period, immersed tube piles are widely used in soft soil areas in my country. For bottom pile construction, double-layer clamping pile boxes are widely used in the construction of internal and external double-tube composite bottom expansion piles. The process of internal and external double-tube composite bottom expansion piles is roughly as follows: the inner The pipe and the outer pipe are pressed into the required pile position. After the inner and outer pipes are pressed to the calibrated height, the outer pipe is clamped, the inner pipe is pulled out of the ground, and the outer pipe is lifted up for a short distance to fill the bottom of the outer pipe. The auxiliary material...

AI Technical Summary

Problems solved by technology

[0004] The existing upper and lower double-layer pile box cylinders are independently controlled, that is, the hydraulic system of the upper layer pile box cylinder and the lower layer pile box oil cylinder hydraulic system are independent of each other and do not interfere with each other. This will have a disadvantage: when the second type of work When switching between the second working condition and the third working condition, that is, when the loose clamping state of the upper pile box and the lower pile box needs to be switched, the operator can easily only operate the pile box that needs to be clamped, and forget to operate The pile clamping box that needs to be released, operating the pile in this case will cause damage to the pile clamping box that was forgotten to be released, therefore, a solution is needed in the prior art to solve this problem

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