High efficiency diesel pile hammer and gas piston structure thereof

Abstract

The invention discloses a high-efficiency diesel pile hammer which comprises a piston, a cylinder hammer and a guide rod. The guide rod is arranged fixedly on the piston body, and the cylinder hammer can move to and fro along the guide rod. The piston is equipped with a gas nozzle. The gas nozzle is a pressure gas nozzle equipped with a single-way valve. The working end surface of the piston is equipped with at least one gas nozzle. In addition, an oil nozzle is also arranged on the working end surface. The diesel pile hammer and the piston structure of the hammer not only ensures that the reliable construction work can be conducted with the pile hammer in case of the soft soil stratum and other unfavorable soil conditions, but also can discharge the combustion waste gas in a gas cylinder chamber smoothly. Moreover, the pile hammer is provided with the strong blasting capability and the favorable heat radiation conditions. Thus, the piling efficiency is greatly promoted, and the invention is widely applicable for the diesel pile hammers of different specifications and types.

Description

technical field [0001] The invention relates to the technical field of pile machinery for building construction, in particular to the improvement of the structure of a diesel piling hammer. Background technique [0002] Among the piling machinery in construction, diesel piling hammer is widely used in bridges, dikes, roads, water conservancy projects, industrial and civil buildings due to its simple structure, large impact energy, convenient operation and maintenance, and good cold start performance. Pile foundation works are under construction. [0003] At present, diesel piling hammers, especially guide rod diesel piling hammers, mainly include pistons fixed at the lower end of the guide rod, impact parts cylinder hammer, beams fixed at the upper end of the guide rod, landing gear on the beam, and guide rods. The principle is similar to that of a two-stroke diesel engine. When the diesel piling hammer is working, the hammer hook of the undercarriage of the piling hammer ...

AI Technical Summary

Problems solved by technology

[0004] Although the existing diesel piling hammer has the above-mentioned obvious advantages in actual construction, it also has some serious shortcomings: on the one hand, when the existing diesel piling hammer encounters a soft soil layer during construction, due to the piston and pile body The settlement speed is fast and difficult to control, the effective compression stroke of the cylinder hammer sleeve and the piston is greatly reduced, and it is difficult to form a high oil-gas compression force and compression temperature in an instant, resulting in incomplete combustion of the fuel in the cylinder hammer compression chamber, or even failure to ignite Detonation; even if it can be detonated, there will be extremely thick smoke and high fuel consumption, which will not only pollute the environment, but also waste fuel resources, and the cylinder hammer will jump lower and lower, and the blow will be weak until it stops working normally

Therefore, diesel piling hammers generally have the phenomenon that they cannot work normally or do not explode at all in soft soil construction, which has plagued pile foundation construction for a long time.

On the other hand, since the cylinder cavity on the cylinder hammer is an inverted cup-shaped concave cavity with an opening downward, it is difficult for the cylinder hammer bounced up by the explosion to smoothly discharge the fuel exhaust gas in the cavity and replenish it into the cylinder hammer by itself. Fresh air; in other words, there is always a very high proportion of exhaust gas remaining in the closed compressed air chamber formed by the cylinder chamber of the cylinder hammer and the piston, which directly leads to defects such as insufficient fuel combustion, high fuel consumption, and low work efficiency

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