Oil supply device of clamping cylinder of hydraulic static pile press

Abstract

The invention discloses an oil supply device of a clamping cylinder of a hydraulic static pile press. The oil supply device comprises a pile clamping cylinder (1), a main pile clamping cylinder (3) and an auxiliary pile clamping cylinder (2), a rodless cavity of the pile clamping cylinder (1) is connected with oil outlets of a first check valve (6) and a second check valve (7), a port A1 of a first throttle valve (4) is connected with a rodless cavity of the main pile clamping cylinder (3), a port A2 of a second throttle valve (5) is connected with a rodless cavity of the auxiliary pile clamping cylinder (2), an oil inlet of the first check valve (6) is connected with a port B1 of the first throttle valve (4), and an oil inlet of the second check valve (7) is connected with a port B2 of the second throttle valve (5). The oil supply device is simple in structure and operation and high in work efficiency and reliability, and repeated clamping operation due to loosening of the clamping cylinder can be avoided.

Description

Technical field [0001] The invention relates to a hydraulic static pile pressing machine clamping oil cylinder, in particular to an oil supplement device for the hydraulic static pile pressing machine clamping oil cylinder. Background technique [0002] The hydraulic static pile driver relies on the pile clamping cylinder to hold the prefabricated pile, and the pile clamp box is pressed down by the pile clamping cylinder to press the prefabricated pile into the foundation. When the pile clamping cylinder of the existing hydraulic static pile driver is in a tight state, the hydraulic oil in the rodless cavity only enters through the hydraulic control check valve and locks the pressure to provide pile clamping force. It has the following disadvantages: There is a certain amount of leakage between the hydraulically controlled check valve and the pile clamping cylinder. As the leaked oil increases, the pressure of the cylinder decreases and the clamping force will become smaller and ...

AI Technical Summary

Problems solved by technology

When the pile clamping oil cylinder of the existing hydraulic static pile driver is in the tight state, the hydraulic oil in the rodless chamber only enters through the hydraulic control check valve and locks the pressure to provide the pile clamping force. It has the following disadvantages: There is a certain leakage between the hydraulic control check valve and the pile clamping cylinder. As the leaked oil increases, the pressure of the cylinder decreases, and the pile clamping force will become smaller and smaller. Therefore, during a pile pressing process, the pile clamping cylinder often needs to be Repeated pressurization is cumbersome to operate and low in work efficiency. If the pressure is not replenished in time, slippage will often occur and damage the prefabricated piles and pile drivers.

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