Drill pipe connected through cooperation of taper pipe threads and spline sliding sleeve

Abstract

The invention discloses a drill pipe connected through cooperation of taper pipe threads and a spline sliding sleeve. The drill pipe comprises an upper drill pipe body and a lower drill pipe body connected with the upper drill pipe body. A male connector with an outer thread is arranged at a drill pipe connector part of the upper drill pipe body, a female connector with an inner thread is arranged at the drill pipe connector part of the lower drill pipe body, and the male connector and the female connector are connected through threaded fit. The drill pipe further comprises the spline sliding sleeve and a positioning device, the spline sliding sleeve is arranged on the periphery of the drill pipe connector in a sleeving mode, grooves are formed in the upper drill pipe body, holes with the diameter equal to that of the grooves are formed in the spline sliding sleeve and correspond to the grooves one to one, and the positioning device penetrates through the holes and is inserted into the grooves. According to the drill pipe, the upper drill pipe body and the lower drill pipe body can be conveniently connected and demounted; the male taper pipe connector and the female taper pipe connector which are concentrically arranged in the drill pipe are connected through the threads, so that it is ensured that the upper drill pipe body and the lower drill pipe body are closely connected, and it is also ensured that the drill pipe operates stably in the use process; the drill pipe has large transmission torque.

Description

technical field [0001] The invention relates to a drill pipe. The joint of the drill pipe is matched and connected with a taper pipe thread and a spline sliding sleeve, which belongs to the field of piling engineering machinery. Background technique [0002] In the construction piling process, the drill pipe is a rod connected to the drill bit to transmit power. At present, the connection methods of the upper and lower drill pipes of drill pipes include: flange fixed connection, hexagonal joint or spline connection, etc. These connection methods generally have the problem of troublesome installation and difficulty in concentricity of the upper and lower drill pipes. In addition, using the above connection The drill pipe obtained by this method also has the problem of small transmission torque and unstable operation. Therefore, it is necessary to develop a drill pipe with large transmission torque and stable operation. Contents of the invention [0003] Purpose of the inve...

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Problems solved by technology

At present, the connection methods of the upper and lower drill pipes of drill pipes include: flange fixed connection, hexagonal joint or spline connection, etc. These connection methods generally have the problem of troublesome installation and difficulty in concentricity of the upper and lower drill pipes. In addition, using the above connection The drill pipe obtained by this method also has the problem of small transmission torque and unstable operation. Therefore, it is necessary to develop a drill pipe with large transmission torque and stable operation.

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