Power head and rotary drilling rig

Abstract

The invention discloses a power head; the power head comprises a transmission case (1), a connecting frame (2) and a back slide carriage (3), wherein the connecting frame is connected between the transmission case and the back slide carriage; a vibration absorbing connecting piece is connected between the back slide carriage and the transmission case and / or between the connecting frame and the back slide carriage; a return device is arranged between the transmission case and the back slide carriage; and the return device can be used for limiting the moving range of the transmission case relative to the back slide carriage and can be used for stabilizing the transmission case in an initial position relative to the back slide carriage. The invention further provides a rotary drilling rig. Through the adoption of the technical scheme, the power head disclosed by the invention is flexible, can be used for absorbing impact force acting upon the power head and is also provided with the return device to prevent the deflection amplitude of the power head from being overlarge. Through the adoption of the power head disclosed by the invention, the vibration resistance of the power head can be greatly enhanced, the damage to a drill pipe can be also avoided, and huge effects on the enhancement of the performance of the whole mainframe, the service life of each part as well as safeties and healths of operators are achieved.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a power head and a rotary drilling machine including the power head. Background technique [0002] At present, power head drilling equipment is often used in engineering practices such as geological drilling and geotechnical engineering, such as rotary drilling rigs and other engineering machinery. Taking the existing rotary drilling rigs as an example, some rotary drilling rigs are provided with a buffer device, but the buffer device is mainly to reduce the damage to the power head once the drilling rig "smashes the rod". [0003] Such as figure 1 Shown is the structural diagram of the power head of the rotary drilling rig in the prior art, the power head includes a transmission box 1, a connecting frame 2 and a back carriage 3, and the connection frame 2 rigidly connects the transmission case 1 and the back carriage 3 on the Together. Usually, the connection frame 2 is c...

AI Technical Summary

Problems solved by technology

[0004] Due to the limitation of the structure, when the power head drills with the drill pipe and the drill tool at a certain speed and specific pressure, the formation will produce a huge counter torque and impact on the drill tool, and a small part of it is driven by the cylindrical shape at the bottom of the drill pipe. The spring absorbs it, but most of it is directly transmitted to the power head through the drill tool and the drill pipe. Since the existing above-mentioned buffer device is powerless to this counter torque and impact, the power head has no ability to absorb the impact from bottom to top. Therefore, most of the counter torque and impact will be transmitted to the various parts of the main engine through the power head, that is, the various parts of the main engine are in a state of vibration of different lengths for a long time during construction.

With the increase of time, the damage of various parts of the main engine due to fatigue often occurs, which is extremely unfavorable to the service life of the main engine and the personal safety and health of the operators.

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