Four-cylinder closed hydraulic bucket for rotary excavating pile machine

Abstract

The invention relates to a four-cylinder closed hydraulic bucket for a rotary excavating pile machine. The four-cylinder closed hydraulic bucket can drill and excavate a hole and can also be used for a continuous wall excavating project. The problem that when a known hydraulic bucket for the rotary excavating pile machine meets some hard operation layers, two bucket bodies cannot be closed in place and cannot be lifted and unload soil is mainly solved. A stretchable drill rod is inserted into a sleeve groove of a tooth disc occluder to be connected through a plug pin, and the lower end of the tooth disc occluder is connected with a stand column. Two bucket bodies are connected to two bucket hinge shafts at the lower end of the stand column respectively. The upper ends of four hydraulic oil cylinders are connected to four oil cylinder hinge shafts on the stand column respectively, and the lower ends of the four hydraulic oil cylinders are connected to four oil cylinder connecting shafts on the two bucket bodies respectively. The four-cylinder closed hydraulic bucket is good in operation guidance, the perpendicularity of the stretchable drill rod is high, the included angle between the guiding lines of the four hydraulic oil cylinders and the vertical line of the stretchable drill rod is large, the formed closing force of the bucket bodies is large, and the four-cylinder closed hydraulic bucket is convenient to assemble and disassemble.

Description

technical field [0001] The present invention relates to a rotary pile machine, in particular to a rotary pile machine that can rotate 360 ​​degrees, and utilizes the gravity of the telescopic drill rod of the rotary pile machine and the pressure of the pressurized oil cylinder of the rotary pile machine to not only drill pile holes, but also The four-cylinder closed hydraulic grab of the rotary pile machine that can excavate the diaphragm wall project. Background technique [0002] The currently widely used XG series diaphragm wall excavation equipment can only rely on the weight of its grab bucket. The grab bucket is deliberately made heavier. The grab bucket’s dead weight is generally about 15 tons, so as to increase the pressure value of the grab bucket teeth. When in use, the grab adopts a free-falling type to cut downwards. When it cuts downwards, it can only rely on its own gravity to generate pressure on the working layer. Once it encounters a harder layer, the grab w...

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Problems solved by technology

[0002] The currently widely used XG series diaphragm wall excavation equipment can only rely on the weight of its grab bucket. The grab bucket is deliberately made heavier. The grab bucket’s dead weight is generally about 15 tons, so as to increase the pressure value of the grab bucket teeth. When in use, the grab adopts a free-falling type to cut downwards. When it cuts downwards, it can only rely on its own gravity to generate pressure on the working layer. Once it encounters a harder layer, the grab will be blocked and cannot cut deep. In addition, the grab and its operating power machine are connected by wire ropes, so sometimes when the grab falls down, its directionality, that is, the verticality is difficult to accurately control, especially when there is a large difference in the hardness and softness of the same excavation layer. When the grab is cut down, the bucket body is very easy to tilt, and it is very difficult to correct its deviation. Therefore, the problem that the rope type grab cannot be pressurized and easily tilted when it cuts down has always been a major problem in the operation of this equipment. Difficulties; although the double-cylinder hydraulic grab of the rotary pile machine produced by Xiangyang Changkan Intelligent Machinery Co., Ltd. can solve the problems of vertical guidance and pressure, there are still many major problems in construction; one is because the upper ends of the two oil cylinders are It is connected to the two trunnions of the upper cylinder, and the angle between the guide axis of the two cylinders and the vertical line of the cylinder is small. When the piston rods of the two cylinders are pushed to the left and right, they are assigned to push the two The closing force of the grab bucket is actually very small. It often happens that the two grab buckets cannot be closed in place when encountering a slightly harder working layer during construction; The upper vertical tube is set very high, so that when the pile driver lifts the grab bucket, the upper end (port) of the grab vertical tube often withstands the lower end (lower end) of the previous telescopic drill rod during the contraction process of the telescopic drill rod. Port) part, so that the telescopic drill pipe cannot be smoothly retracted in place, and the grab bucket cannot lift the soil; third, because the jaw clutch is set at the lower part of the vertical cylinder, the diameter of the vertical cylinder cannot be made according to a uniform standard, that is, various The diameters of telescopic drill rods equipped on rotary pile machines of different brands and different powers are different, which is not convenient for pile machines of different powers. very difficult to latch on

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