Rotary excavating pile machine double-cylinder hydraulic grab

Abstract

The invention relates to a rotary excavating pile machine double-cylinder hydraulic grab which can rotate by 360 degrees. According to the hydraulic grab, double cylinders control a rotary excavating pile machine to be opened and closed. The problems that an existing opening-closing type grab only relies on the weight of the grab, the grab is inserted into a soil layer in a free-falling mode downwards, an inserting point cannot be controlled accurately easily, and soil discharging cannot be carried out smoothly are mainly solved. Two grab shafts are connected to the lower end of a lower stand cylinder. A jaw clutch is arranged at the upper end in the lower stand cylinder. The lower stand cylinder is connected with an upper stand cylinder through a flange. A symmetrical shaft on the outer side of the upper end of the upper stand cylinder is connected with two opening-closing hydraulic cylinders. Four telescopic ends of the two opening-closing hydraulic cylinders are connected to two grabs. A telescopic drilling rod is connected into a sleeve groove of the jaw clutch. According to the rotary excavating pile machine double-cylinder hydraulic grab, grab falling direction can be controlled accurately, rotating and pressurizing by 360 degrees can be achieved, and the hydraulic grab has the advantages of being short, light in weight and good in guiding performance.

Description

technical field [0001] The invention relates to a double-cylinder hydraulic grab of a rotary pile machine, in particular to a hydraulic grab for opening and closing of a rotary pile machine that can rotate at 360 degrees and is controlled by two cylinders. Background technique [0002] The currently used XG series diaphragm wall excavation equipment can only rely on its own weight of the open and close grab bucket to cut into the excavation soil layer in a free-fall manner. When it cuts down, because it cannot borrow external pressure, once encountering a hard layer or solid objects, the grab will be blocked and cannot be cut in depth, and the grab and its working power machine are connected by wire ropes, so it is difficult to accurately control the directionality (verticality) when the grab falls down, especially When there is a large difference in the hardness and softness of the same excavation layer, it is difficult for the grab to cut vertically downwards. Therefore...

AI Technical Summary

Problems solved by technology

[0002] The currently used XG series diaphragm wall excavation equipment can only rely on its own weight of the open and close grab bucket to cut into the excavation soil layer in a free-fall manner. When it cuts down, because it cannot borrow external pressure, once encountering a hard layer or solid objects, the grab will be blocked and cannot be cut in depth, and the grab and its working power machine are connected by wire ropes, so it is difficult to accurately control the directionality (verticality) when the grab falls down, especially When there is a large difference in the hardness and softness of the same excavation layer, it is difficult for the grab to cut vertically downwards. Therefore, the problem of unfavorable deviation correction and inability to pressurize the rope-type grab is a worldwide problem in the operation of this equipment. Shao Although Bo and Xiang Bingchang's disclosed pile driver hydraulic rotary grab can solve the problem of vertical orientation, it still cannot use the pressurization and rotation device (pressurized cylinder and power head) of the rotary pile driver to keep the grab out of the way. In the state of displacement, pressurize while rotating (the single-cylinder opening and closing hydraulic rotary grab is not equipped with a jaw clutch), and because the single-cylinder opening and closing hydraulic rotary grab itself has inherent disadvantages of height (about 3 meters) and its own weight, As a result, when it is in use, the unloading height is limited, and the soil cannot be unloaded smoothly. When the grab is excavated in the thick mud, because the thick mud has a great adsorption force on the grab, and the grab has a large dead weight, there are Sometimes the main hoist of the rotary pile machine cannot smoothly lift the grab bucket after grabbing the soil, so the above-mentioned equipment still has many disadvantages in engineering operations

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