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What is the skid during the construction of the rotary excavator?
Release time:
2018-11-01
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In the practical application of rotary excavators, there are many problems in the use of rotary excavators due to various external factors, thus affecting the normal construction. Today, the editor will briefly introduce the common causes of slippage in the daily use of rotary excavators, hoping to provide you with help. Causes of skidding in the construction of rotary digging machine: the drilling tool is not concentric with the drill pipe of rotary digging machine, the angle of drilling teeth is less than 45 degrees, the center cone is improper, the teeth are arranged too densely, the drilling tool is seriously worn, and a series of reasons cause skidding. The reason for the mud is that the construction on the sub-clay bottom layer often slips, which is mainly due to the repeated use of the mud.
In the practical application of rotary excavators, there are many problems in the use of rotary excavators due to various external factors, thus affecting the normal construction. Today, the editor will briefly introduce the common causes of slippage in the daily use of rotary excavators, hoping to provide you with help.
rotary digging machine construction slip reasons:
Drilling tool reason
Because the drilling tool is not concentric with the drill pipe of the rotary digging machine, the drilling tooth angle is less than 45 degrees, the center cone is improper, the tooth is too dense, the drilling tool is seriously worn, and a series of reasons cause slippage.
Mud causes
There is often slippage in the construction of sub-clay bottom layer. This is mainly due to the floating drill caused by the increase of mud concentration and specific gravity in the process of repeated utilization. The drill bit cannot be placed at the bottom of the hole. After forced pressure is applied to the bottom of the hole, the mud plays a side effect at this time due to the fast rotation speed of the drill bit. It lubricates the clay at the bottom of the hole and the cutting surface of the drill tooth. In this way, slippage is generated under the action of mud. In the face of this situation, reduce the specific gravity of mud. When the drill bit reaches the bottom of the hole, manually control the number of revolutions of the power head and slowly pressurize at 9 revolutions per minute before it can be solved. Of course, the above is a grinding rod drill.
geological causes
Sometimes, the drill pipe of rotary excavator will be applied to some mudstone geology. The compressive strength of this geology is not high, only about 550Kp, but it is very dense and easy to slip in case of water. To solve mudstone slip, it is necessary to completely solve the above three reasons and make efforts in bit selection.
Improper operation of the operator can also cause slippage.
For example, the bottom of the hole is forcibly dug flat, causing the next drill to slip. When the drill bit is lifted, the bucket door is not closed completely, and a large amount of soil in the bucket falls into the bottom of the hole, which is also the cause of slippage. The starting speed is too fast, resulting in paste drilling, operation and reasonable selection of drill bit is the most basic reason to solve the slip.
Generally speaking, the skidding of the rotary excavator during construction is mainly caused by the above reasons. In order to restore the normal use of the rotary excavator as soon as possible, when the skidding phenomenon occurs, the user needs to investigate the causes, and then carry out targeted solutions according to the causes, so as to solve the skidding problem in a short time.
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