Floating device for power head of trenchless pipe laying rig

Abstract

The invention relates to a floating device for a power head of a non-excavation pipelaying drilling rig, which includes a main shaft of the power head, a floating sub-joint and a spline sleeve. The gap fit is adopted between the sleeves; it is characterized in that: the inner hole of the main shaft of the power head and the inner hole of the floating nipple are sealed and connected by a hollow spherical water shaft; the first end of the spherical water shaft is set as a spherical surface , the first end is connected to the main shaft of the power head through the first sealing connection assembly; the second end of the spherical water shaft is set as a cylindrical surface, and the second end is connected to the floating nipple through the second sealing connection assembly. The invention has ingenious structure and reasonable design. When the cylindrical surface at the second end of the spherical water shaft is subjected to an external load, the spherical surface at the first end of the spherical water shaft can rotate freely to balance the forces on both ends. Ensure the water seal of the entire spherical water shaft.

Description

technical field [0001] The invention relates to a floating device for a power head of a non-excavation pipe-laying drilling rig, which belongs to the technology of non-excavation pipe-laying machinery. Background technique [0002] At present, the horizontal directional drilling power head can use the power head floating device to optimize the power head floating and protect the large gear of the power head. The key component of the floating device of the power head is the hollow connection shaft connecting the main shaft of the power head and the floating nipple. A reasonable structure of the connecting shaft is the prerequisite to ensure the reliable operation of the floating device of the power head. When the horizontal directional drilling power head cooperates with the floating device of the power head for construction, the floating nipple needs to be able to float back and forth with the position of the drill pipe when loading and unloading the drill pipe. Swing, esp...

AI Technical Summary

Problems solved by technology

When the horizontal directional drilling power head cooperates with the floating device of the power head for construction, the floating nipple needs to be able to float back and forth with the position of the drill pipe when loading and unloading the drill pipe. Swing, especially when hard objects or obstacles are suddenly encountered during construction, the situation is more severe, and the connecting shaft in the floating device of the power head is prone to break due to the swing of the floating nipple, which affects the use of the floating device of the power head

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