Driving and connecting device for rotary drilling rig power head pile casing

Abstract

The invention relates to a connecting device which is required for connecting a pile casing when a rotary drilling rig power head is in construction for stratum easy to collapse. A driving and connecting device provided by the invention consists of a power head connecting shaft, a connecting body, pin shafts, a stop pin, a split pin and a pile casing driver. The lower end of the power head connecting shaft is connected with the upper end of the connecting body through 8 pin shafts which are uniformly distributed along the periphery direction, and the stop pin and the split pin limit axial float of the 8 pin shafts. The lower end of the connecting body is connected with the pile casing driver through 2 pin shafts. The power head directly drive the pile casing through the connecting body and the pile casing driver when in rotation and pressurization. The connecting body in the device consists of two parts; the upper and lower parts of the connecting body are respectively welded on an intermediate ring plate; an external ring arranged at the upper part of the connecting body is a ring plate; an internal ring arranged at the upper part of the connecting body are 8 arc-shaped plates which are uniformly distributed along the periphery direction; the external plate and the internal plates are welded on the intermediate ring plate to form 8 grooves for connection with the power head connecting shaft; the lower part of the connecting body are two arc-shaped plates which are intermediately provided with a shaft sleeve in a welding way; and the two arc-shaped plates are symmetrically welded on the intermediate ring plate for connection with the pile casing driver. With the help of the connecting body, the pin shafts, the stop pin and the split pin, the connecting structure provided by the invention effectively realize the drive of the power head on the pile casing.

Description

technical field [0001] The invention relates to a connecting device used when the power head of a rotary drilling rig needs to connect a casing in the construction of easily collapsed strata, and is suitable for the power heads of various types of rotary drilling rigs. Background technique [0002] During the construction of the rotary drilling rig in soft and collapsible ground, it is necessary to press into the casing to protect the construction hole and avoid the occurrence of hole collapse. Pressing into the casing requires equipment to provide rotary drive and pressure. At present, most of the power heads of rotary drilling rigs do not have a structure that can be directly connected to the casing. In actual construction, a pipe swing machine is generally used to assist in the installation of the casing, which not only increases the cost of equipment purchased by the user, but also makes the installation of the equipment inconvenient. Contents of the invention [000...

AI Technical Summary

Problems solved by technology

In the actual construction, the pipe swing machine is generally used to assist the installation of the casing, which not

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