The pneumatic rock drill is divided into several types according to the weight, the impact frequency, the swing mode and the valve train. The commonly used classification criteria are classified by the technical methods of rock drills . According to the support mode, rock drills are divided into three types: hand-held, air-legged and guide rail.
The main technical characteristics of the pneumatic impact rock drill are shown in Table 1.
Table 1 Technical characteristics of pneumatic impact rock drill
Types of | model | weight (kg) | Inner diameter × stroke (mm) | Impact frequency (times / min) | Torque (kg·cm) | Air consumption (m 3 /min) | Manufacturer |
Handheld | 01-30 | 28 | 65×60 | 1650 | 92 | 2.2 | Shanghai Fengdong Tools Factory |
Air leg | YT-23 (7665) | twenty three | 76×60 | 2100 | >150 | <3.6 | Shenyang Fengdong Tools Factory |
YT-24 | twenty four | 70×76 | 1800 | >130 | <2.9 | |
YT-25 | twenty three | 70×55 | >1800 | >100 | <2.6 | |
YT-26 | 26.5 | 85×50 | 2600 | >180 | 3 | Xiangtan Fengdong Tools Factory |
YT-28 | 28 | 75×70 | 2000 | >150 | <5 | Tianshui Fengdong Tools Factory |
Upward | YSP-45 | 44 | 95×47 | >2700 | >180 | <5 | Shenyang Fengdong Tools Factory |
Rail type | YG-40 | 36 | 85×80 | 1600 | 380 | 5 | Hagiwara Wind Tools Factory |
YG-80 | 74 | 120×70 | 1800 | 1000 | 8.1 | |
YGZ-90 | 90 | 125×62 | 2000 | 1200 | 11 | Nanjing Combat Machinery Factory |
YG-35 | 35 | 100×48 | 2650 | 680 | 6.5 | Shenyang Fengdong Tools Factory |
BBD-91W | 27.3 | 90×45 | 3350 | | 5.6 | Sweden |
F-10 | 44.5 | 85×49 | 2600 | | | Japan |
VL120 | 170 | 121×70 | 1900 | | 17.0 | United States |
YTPR120 | 175 | 130×70 | 1800 | | 13.7 | Japan |
The hand-held rock drill is held by the operator on the rock wall or in the rock. The downward rock drill used in the shaft excavation is also hand-held. The impact frequency of the rock drill is less than 2000 times/min and the weight is limited to 30kg or less. Otherwise, it is harmful to work health.
The air-legged impact frequency reaches 2,600 times/min, including the air leg weighing approximately 50 kg.
The rail-type rock drill has a shock frequency of more than 3000 times/min and a weight of 100-200kg. The steel rope, chain or plunger thruster provides the rock thrust and realizes the idling advance and retreat of the body. The propeller and the rock drill are installed together on the trolley. On the drill arm.
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