Piling-machine chain drill bit high in controllability

Abstract

The invention discloses a piling-machine chain drill bit high in controllability. The piling-machine chain drill bit includes a chain rack, at least one chain carrier is arranged on the chain rack, and a plurality of cutting teeth are arranged on the chain carriers; the outer ends of the cutting teeth protrude from the chain carriers and face the outer sides of the chain carriers, and chain drivemechanisms are arranged between the chain carriers and the chain rack so as to drive the chain carriers to do circumferential rotation or reciprocating swing on the chain rack; the chain rack is located on the lower portion of a drill rod and provided with a power device, and the power device includes a plurality of drive mechanisms corresponding to the chain drive mechanisms one to one. The structure facilitates the independent work of each chain carrier and the independent control of the running speed and direction of each chain carrier, and the whole soil excavation and stirring process ismore controllable.

Description

[0001] The present invention claims the priority of the Chinese utility model patent application whose application date is "May 12, 2017" and the application number is "2017205251560" and the name is "soil fully agitating type chain drill bit", and requires the application date to be "2017 On December 12, 2017, the priority of the Chinese invention patent application with the application number "2017113202359" and the name "chain drill for pile driver and pile driver", the entire content of which is incorporated in this application. technical field [0002] The invention belongs to the technical field of pile driver equipment, and relates to cement mixing pile forming equipment, in particular to a pile driver and its chain drill bit and related parts or assemblies, in particular to a pile driver chain drill bit with strong controllability. Background technique [0003] Cement mixing pile foundation is an effective form of soft foundation treatment. It usually uses cement as t...

AI Technical Summary

Problems solved by technology

This kind of pile drill bit uses a spiral blade to cut and pulverize the soil. The size of the blade or the cutter head is relatively large, and the cut rock and soil are relatively large in size, and even blocky, which will lead to the following problems: 1. During the production process of the mixing pile, the cement slurry cannot enter the "blocked rock and soil", resulting in the presence of massive rock and soil in the concrete mixing pile, resulting in a significant decrease in the compressive and bearing capacity of the concrete mixing pile; ② When drilling the silt layer And when making concrete mixing piles, there may be a soil squeezing effect, which makes the bottom of the concrete mixing piles hollow, and the phenomenon of "floating piles" appears, resulting in unstable foundations of cement-soil mixing piles

This kind of chain-knife-type mixing pile wall-forming equipment is mostly used in excavating groove-type foundations. The chain-knife cutting box assembly has a large volume, large driving power, and high energy consumption, and its power is set on the top of the pile frame, which means The drive chain is longer, which not only makes the power efficiency low, but also prone to failure

In addition, there is still a technical problem of poor soil crushing effect due to the relatively large width horizontal cutters arranged on the chain rail

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