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小型旋挖机施工中打滑不进尺的解决方法

2019-07-16 点击:1067
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小型旋转挖掘机是滑动过程中的常见问题而不是滑动。主要性能是仪表显示的深度不随钻机动力头的行程而变化。如果在施工过程中出现此类问题,如果不采取适当的措施,则需要很长时间才能解决。中意汇龙机械小编将为您解答。

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(1)问题分析

“滑移”发生的原因受三个方面的影响:钻杆的配置,地层的性质和操作员的经验:

(1)杆配置

“滑动”主要在钻机配备有摩擦杆的条件下进行。这与摩擦杆的工作原理有关。传递:摩擦杆压力的方法是内杆和外杆。实现键之间的摩擦,并且内键和外键的摩擦力与动力头的扭矩成比例。动力头的输出扭矩由钻头破碎地层的阻力决定。

(2)地层特征

发生滑移现象的地层一般具有较大的强度,通常需要施加一定的压力来钻牙以切入地层;

(3)运营经验

在正常情况下,上述两个因素不会导致滑倒,但是当操作员的操作水平不够熟练或地面条件不能很好理解时,这种现象的概率会大大增加。由于小型旋转挖掘机在孔结构中在正常条件下连续切割,因此在最后一次切割结束时留下凹凸结构,留下下一次切割的入口点。如果操作人员的操作经验不足,入口点被多余的污垢覆盖或平滑,这将导致下一个钻孔不能顺利切入,影响动力头的扭矩输出,最后压力不能传递到钻头,钻头在孔的底部空转。

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(2)处理方法

(1) Using the excavator with on-site auxiliary construction, the semi-bucket with angular corners of the gravel is placed in the hole, and the drill bit is drilled again, and the crushing stone is pressed into the ground to provide a cutting point for the drilled tooth. This method solves the slippage. The phenomenon is faster, but improper operation may break the drill.

(2) Use certain operational skills to eliminate slippage. Raise the power head to the highest point, quickly reverse, sweep the virtual soil covered by the bottom of the hole, then pressurize and then rotate. By thus bringing the inner and outer keys of the drill pipe into contact, the pressure is transmitted to the bottom of the hole, and the drill bit is cut into the ground. If it fails once, it can be repeated, but the single pressurization stroke should not exceed 1m, so as to avoid the broken rod and damage the drill rod.

(3) Increasing the length and angle of the drill teeth of the rotary digging machine bit, so that the drilling teeth can be better cut into the formation. However, this method takes a lot of time and is generally not recommended.

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(3) Preventive measures

When using a friction rod rotary boring machine to drill into a hard state of silt and earth-boring formations, the operator should pay special attention to the following two points:

(1) Control the single footage to avoid excessive single footage, causing the drilling to emerge from the top of the drill and cover the hard formation.

(2) When lifting the bottom of the bucket at the bottom of the hole, try to avoid multiple reversals to avoid grinding the drill bit into the point.

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Zhongyi Huilong Machinery Xiaobian reminds: For the easy-slip formation, as long as the rotary drilling rig operator can do the above two well, in most cases, the drilling can be guaranteed to proceed normally.

Editor-in-Chief: Zhongyi Huilong Machinery

Hunan Zhongyi Huilong Machinery Equipment Co. Ltd. WeChat (ID: hljx66), please reprint related articles, please indicate the source

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