Sand mixer for non-excavation directional drilling rig

Abstract

The invention relates to the field of accessories of non-excavation devices, and aims at providing a silt stirrer for a non-excavation guide drilling machine, which is used for stirring silt in a chamfered hole fully during the construction of the guide drilling machine and can be used for rapidly discharging the silt in the chamfered hole out of the chamfered hole. The silt stirrer comprises at least one group of locking devices and at least one group of stirring devices, wherein the stirring devices are arranged outside the locking devices, and when the locking devices rotate, the stirring devices synchronously rotate with the locking devices. Through arranging the silt stirrer for the non-excavation guide drilling machine on a rotating rod of the drilling machine, the invention solves the problem of incapability of stirring silt at the bottom of a hole and capability of only stirring one small part of silt due to a small stirring range of the rotating rod of the traditional drilling machine, and achieves the purpose of rapidly discharging the silt in the hole out of the hole.

Description

technical field [0001] The invention relates to the field of non-excavation equipment accessories, in particular to a sand mixer for a non-excavation directional drilling machine. Background technique [0002] Within the trenchless technology industry, directional drilling has been a major growth area. At present, directional drilling is a common construction technology in the departments of natural gas, tap water, electric power and telecommunications. Recently, due to the improvement in construction accuracy, directional drilling has also been used for the laying of sewage pipes and other gravity pipelines. [0003] Most of the current directional drilling uses directional drilling rigs to carry out rotation. While reaming, the equipment mud pump on the ground is used to forcefully inject a large amount of water and mud into the hole through the rotating rod of the drilling rig, and the expanded mud is cut, and the sand and gravel are used. When the hole reamer is taken o...

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Problems solved by technology

[0004] The main reason is that the rotating rod of the drilling rig only rotates in the hole with a reaming drill bit during construction, and the rotating rod is provided with the middle part of the rotating head. The range of stirring of the rotating rod is very small, and only a small part of the sediment , unable to stir the sediment at the bottom of the hole

In order to clear the sand and gravel in the hole and lay the pipeline smoothly, the reamer can only be dragged several times. However, when the reamer is pulled many times, the reamer always turns to the right because the rotating rod of the guide drilling rig is working. Therefore, the right wall of the hole is much more likely to be gnawed than other positions, which will cause the hole to become elliptical. After the hole becomes elliptical, the supporting force will be greatly reduced, which will cause the hole to collapse, the road surface to collapse, the project will fail, and the loss will be heavy.

[0005] In order to successfully lower the pipeline during construction, we had to use a high-power drilling rig with a higher pull-back rate to drag and pull hard. As a result, the pipeline was broken, and the road surface collapsed and bulged, which made the project fail and various costs doubled.

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