Gradient pushing and enlarging device

A squeeze-expanding device, gradient technology, applied in drilling equipment, drilling equipment and methods, sheet pile walls, etc., to achieve the effects of light weight, improved work efficiency, and high speed

Inactive Publication Date: 2006-07-12
北京中阔地基基础技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, it solves the hole reaming problem of large-caliber multi-section extruded an

Method used

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  • Gradient pushing and enlarging device
  • Gradient pushing and enlarging device
  • Gradient pushing and enlarging device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0009] Such as figure 1 Shown: the connecting rod 13 has two built-in high-pressure oil inlet pipes 14 and oil outlet pipes 15, which are connected to the gradient large oil cylinder 10; the large oil cylinder 10 is sleeved with the middle oil cylinder 9, and the piston rod 8 is connected to the middle oil cylinder 9 and at the same time is connected to the middle oil cylinder. The arm 5 is connected, the middle squeezing and expanding arm 5 is connected to the upper squeezing and expanding arm 7 through the shaft pin 6, the upper squeezing and expanding arm 7 is connected to the upper connecting plate 12 through the shaft pin 11, and the upper connecting plate 12 is sleeved with the connecting rod 13. The middle squeezing and expanding arm 5 is connected to the lower squeezing and expanding arm 3 through the shaft pin 4, the lower squeezing and expanding arm 3 is connected to the lower connecting plate 1 through the shaft pin 2, and the lower connecting plate 1 is sleeved with t...

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PUM

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Abstract

The invention relates to a gradient expansion device which is formed by expansion arm, cylinder, piston rod, axial pin, moving oil pipe, up-down connection disc, and connection rod group. Wherein, said cylinder is gradient hydraulic cylinder formed by big cylinder, middle cylinder and piston rod; the connection rod is connected to the gradient hydraulic cylinder; the big cylinder is connected to the middle cylinder; the middle cylinder is connected to the piston rod which is connected to the middle expansion arm; the middle expansion arm is connected to the upper and lower expansion arms via axial pins; the upper and lower expansion arms are individually connected to the upper and lower connection discs via axial pins; and the upper and lower connection discs are sheathed with connection rods. The invention uses direct horizontal expansion, with large expansion force, high speed, little disturb on soil, stable expanded chamber, high anti-cutting property, high efficiency, lower volume, lighter, and improved bearing ability, while it can solve the problem of using large-diameter multi-section expansion post to expand hole, to reduce the operation cost.

Description

Technical field: [0001] The invention relates to an extrusion and expansion device in the field of construction engineering, in particular to a gradient extrusion and expansion device for bored piles in construction. Background technique: [0002] Due to the high-speed development and wide application of multi-section squeezed and expanded cast-in-place piles, the size of the squeezed force, the depth of squeezed and the reliability of the squeezed force of the horizontal squeezed expansion equipment for variable cross-section piles are even more important. Due to the limitation of the hole diameter, the original extrusion equipment is transmitted to several sets of extrusion arms by the vertical force of the upper hydraulic cylinder of the extrusion equipment to perform horizontal extrusion. Such extrusion force is greatly reduced and the vertical displacement makes the quality of hole formation unguaranteed. Especially when doing the extrusion and expansion of large-diame...

Claims

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Application Information

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IPC IPC(8): E02D5/48E21B7/28
Inventor 贺德新
Owner 北京中阔地基基础技术有限公司
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