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Pile hammer

A technology of impact parts and pistons, applied in construction, sheet pile walls, foundation structure engineering, etc., can solve the problems of increasing costs and damaging concrete piles

Inactive Publication Date: 2015-09-30
DELMAG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A common problem when hammering concrete piles is that small maximum permissible compressive or tensile stresses in the pile require special measures in order to avoid damage to the concrete pile
[0003] The disadvantage of this known assembly is that the attenuation package must be installed accordingly before each concrete pile is hammered in, thereby increasing the expenditure

Method used

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Examples

Experimental program
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Embodiment Construction

[0015] The diesel ram chosen as the embodiment comprises a cylinder 1 open on both sides, which may generally have a length of 3 to 8 meters and a diameter of 0.2 to 1.5 meters. A piston 2 is movably arranged in the cylinder 1 . A striker 3 coaxial therewith engages displaceably in the open lower end of the cylinder 1 . An annular bearing unit 9 is fixed at the lower end of the cylinder 1 , in which a central rod section 31 of the striker 3 is guided sealingly and displaceably, which has a reduced outer diameter relative to the inner diameter of the cylinder 1 . The diesel ram is mounted displaceably along the column via guide claws 13 arranged on the column 1 .

[0016] At the lower end of the bar section 31 is molded a striker plate 32 located below the column 1 , whose outwardly directed lower convex limiting surface 33 cooperates with the upper end of the concrete pile 8 to be pressed during operation. effect.

[0017] On the upper end of the rod section 31 of the strik...

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Abstract

A pile hammer includes a cylinder, a piston displaceably guided in the cylinder, and a striker displaceably guided in the cylinder. The striker is disposed underneath the piston in the operating position of the pile hammer. A combustion chamber is delimited axially by a face surface of the striker that lies in the interior of the cylinder and by a face surface of the piston. Using at least one fuel feed device a predetermined amount of fuel can be introduced into the combustion chamber during each work cycle. The piston has a cavity that is filled, at least in part, with a movable filler.

Description

technical field [0001] The invention relates to a ram according to the preamble of claim 1 , comprising a cylinder, a piston displaceably guided in the cylinder, and a striker displaceably guided in the cylinder. Background technique [0002] A common problem when hammering concrete piles is that the small maximum permissible compressive or tensile stresses in the pile require special measures in order to avoid damage to the concrete pile. For this purpose, damping packs are arranged between the workpiece of the pile driver and the pile in order to counteract damage to the concrete pile. [0003] The disadvantage of this known assembly is that the attenuation package has to be installed accordingly before each concrete pile is hammered in, which increases the outlay. Contents of the invention [0004] Here, the present invention will provide a remedy. The object of the present invention is to provide a ram which, when hammering into a concrete pile, does not require an a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D7/12E02D7/14
CPCE02D7/125E02D7/12
Inventor L.耶赫M.海歇尔
Owner DELMAG