XCMG XZ320, Руководство по эксплуатации

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Manual of XZ320 Horizontal Directional Drill
29
2.5.1.2
“A” and “B” refer to height of carrier front end and post end to the
ground. “C” refers to horizontal distance of front and post ends and
formula
of perforation angle is follows:
（ （
B-A
）
/C
）
×100
（
Please refer to Figure 8.
）
Figure 8 Definition of perforation angle
Bore can be under the horizontal status as early as possible by little bore
bending if perforation angle is relatively smaller. Bore track and depth will
be increased if perforation angle is relatively larger.
2.5.2 Definition of the minimum angle buildup distance
The minimum angle buildup distance refers to horizontal projected distance
of bore from drilling to horizontal status. Bore slope will exceed bending
extreme of auger stem with damage if angle buildup distance is
excessively small.
The minimum angle buildup distance can be defined by known perforation
angle according to bore depth requirements to the ground.
2.5.3 The minimum hole location depth
Auger stem must be bent stably so bore depth to the ground under
horizontal status shall be defined by perforation angle and bending
extreme of auger stem. Depth is in inverse proportion of perforation angle.
Depth will be increased by increasing perforation angle and angle buildup
distance.
Corresponding angle buildup distance and perforation angle can be
calculated by required hole location depth.
2.6 Equipment preparation
Note: Inspect equipment carefully before daily or shift equipment
startup.
2.6.1 Inspect liquid level and volume including fuel oil, hydraulic oil, cooling
liquid of engine, electric quantity of storage battery and machine oil.
2.6.2 Check if status and function of equipment parts are normal without
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