Double-wall spindle power head for core drill

Abstract

The invention relates to a double-wall spindle power head for a core drill. The power head comprises an outer box body, a power mechanism, a transmission system, a spindle and a sealing unit, wherein the outer box body consists of a box body assembly and an upper box cover which are positioned by a positioning pin and connected by a screw; the power mechanism is a hydraulic motor or a motor; the transmission system consists of a driving gear shaft and a driven gear; the double-wall spindle consists of a spindle outer tube and a spindle inner tube; the spindle outer tube is connected with the driven gear through a spline; the driving gear shaft and the spindle outer tube, and the box body assembly and the upper box cover are connected through a rolling bearing respectively; a shaft hole and a key groove are reserved on the driving gear shaft and used for connecting the power mechanism; the spindle outer tube is provided with a through hole for washing solution to pass through; a sampler can be stored in a cavity of the spindle inner tube; and the sealing unit comprises a dynamic seal and a static seal. The power head has a compact structure and high sealing property, provides rotary motion, rotary torque and washing solution for the drilling of the drill, and is suitable for underwater and land core drilling; and an orifice is not required to be avoided and a water tap is not required to be disassembled when a core is taken.

Description

technical field [0001] The invention relates to geological drilling equipment, in particular to a power head of a double-wall mandrel core drilling rig. Background technique [0002] In seabed geological exploration, gas hydrate detection, seabed crust stability exploration, seabed crust change, seabed prospecting and paleoclimate research all require seabed drilling technology, and seabed drilling rigs are widely used in seabed drilling. Currently in subsea drilling, the drilling equipment is usually placed on the seabed, while the operator controls it remotely from the ship. Therefore, in subsea drilling, in addition to meeting the requirements of the same level of land drilling rigs, higher requirements are also placed on the degree of automation, remote control performance, sealing performance, and reliability of the drilling rig. [0003] However, the existing domestic core drilling rigs are generally not highly automated and rely heavily on manual assistance, resultin...

AI Technical Summary

Problems solved by technology

[0004] 1. The degree of automation of drilling and coring operations is not high, and the use of wireline coring requires opening the hole first, which increases the difficulty of remote control and automated drilling

[0005] 2. When coring with the traditional power head, it is necessary to unscrew and remove the faucet from the power head or the drilling tool, so there are many procedures and long auxiliary working hours

[0006] 3. The waterproof and sealing performance is not good, and it is easy to corrode when working in an underwater high-pressure environment

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