Three-branch single-cylinder hydraulic bidirectional expansion-extrusion device

Abstract

The invention provide a three-branch single-cylinder hydraulic bidirectional expanding-extrusion device, which comprises upper expanding-extrusion arms, lower broken-end expanding-extrusion arms, support arms, a piston rod, a fixed disk, a moving disk and a cylinder block. The three-branch single-cylinder hydraulic bidirectional expanding-extrusion device is characterized in that in rotation of the three-branch single-cylinder hydraulic bidirectional expanding-extrusion device, a soil layer is cut by cutting edges of the upper expanding-extrusion arms to form a cavity, and the lower wall of a bearing disk cavity is rolled by the lower broken-end expanding-extrusion arms to compact the soil layer; when the cavity is formed, the three-branch single-cylinder hydraulic bidirectional expanding-extrusion device rotates reversely; and the upper wall of the bearing disk cavity is squeezed by arc slants of the upper expanding-extrusion arms to compact the soil layer, and the lower broken-end expanding-extrusion arms scrape fallen residue and rotate reversely to roll the lower wall of the bearing disk cavity for the second time so as to compact the soil layer. Compared with the prior art, the three-branch single-cylinder hydraulic bidirectional expanding-extrusion device has the evident advantages that expanding-extrusion is separately performed, quick, laborsaving and reliably effective, the shape of the formed cavity more meets the load bearing requirement, and the like, and accordingly is well worthy of popularization and application.

Description

1. Technical field: [0001] The invention relates to construction pile foundation equipment, in particular to a three-fork single-cylinder hydraulic two-way expansion and extrusion device. 2. Background technology: [0002] The pile foundation extrusion expansion device under the existing technology is more advanced and recognized as the three-fork double-cylinder two-way hydraulic extrusion expansion device. This extrusion expansion device has changed the construction of the pile foundation with its safe, economical and environmentally friendly cavity-making technology. The force mechanism has improved the longitudinal and horizontal soil bearing capacity of the pile foundation, but there are still some deficiencies and defects, mainly in: 1. The double-cylinder two-way hydraulic extrusion device has complex structure, high technical content, high production cost, High difficulty. 2. The load-bearing plate cavity and the load-bearing fork cavity made by the double-cylinder ...

AI Technical Summary

Problems solved by technology

[0002] The pile foundation extrusion expansion device under the existing technology is more advanced and recognized as the three-fork double-cylinder two-way hydraulic extrusion expansion device. This extrusion expansion device has changed the construction of the pile foundation with its safe, economical and environmentally friendly cavity-making technology. The force mechanism has improved the longitudinal and horizontal soil bearing capacity of the pile foundation, but there are still some deficiencies and defects, mainly in: 1. The double-cylinder two-way hydraulic extrusion device has complex structure, high technical content, high production cost, High difficulty

2. The load-bearing plate cavity and the load-bearing fork cavity made by the double-cylinder bidirectional hydraulic extrusion device are up and down symmetrical inset rhombus or inset angle, which deviates from the ideal longitudinal pressure-bearing form

3. During the whole operation process of the twin-cylinder two-way extrusion and expansion device, the soil layer extruded by the rear wheels is the soil layer extruded by the front wheels until it becomes compact and changes the original structure. The soil layer without the original structure is also prone to collapse, which also increases the difficulty of expansion and the supply of power

Images