A hydraulically controlled stop pin reset device with movable guide rail of power tongs

Abstract

A movable type hydraulic control stop pin resetting device for power tong guide rails comprises a tong body, a tong head gear assembly, a tong head clamping mechanism, a stop pin, a resetting gear shaft, a resetting gear base, a bearing, an indicator, a rack-swinging hydraulic cylinder, a guide rail bracket, a conveying hydraulic cylinder and a limiting screw. The outer diameter of the resetting gear shaft is provided with a gear and a limiting groove, the gear is meshed with a rack on the rack-swinging hydraulic cylinder, and a sliding block at the end of a cylinder sleeve of the rack-swinging hydraulic cylinder is connected in the guide rails at the two ends of the guide rail bracket; the conveying hydraulic cylinder is fixed to the guide rail bracket, a piston rod is connected with the rack-swinging hydraulic cylinder, the rotating angle of the resetting gear shaft is limited through the limiting screw, and the indicator is arranged at the end of the resetting gear shaft and used for indicating the reversing position. The rack on the rack-swinging hydraulic cylinder is pushed by the conveying hydraulic cylinder to be meshed with the gear on the resetting gear shaft, and the rack-swinging hydraulic cylinder pushes the resetting gear shaft to steer to achieve remote hydraulic control. The movable type hydraulic control stop pin resetting device has the advantages of being simple in structure, convenient to operate, safe, reliable and the like.

Description

technical field [0001] The invention relates to a power tong for oilfield pipes, in particular to a power tong guide rail mobile hydraulic control stop pin reset device, which belongs to the technical field of petroleum equipment design and manufacture. Background technique [0002] A kind of power tongs for pipes is used in the threading and shattering of oil pipes, casings and drill pipe threads in oilfield wellheads, which can make the thread connection and disassembly of the above-mentioned pipe strings easy. At the end of a make-up or break-out operation of the traditional oilfield tubular power tongs, it is necessary to return the clamp head clamping mechanism set on the clamp head rotary body to the original position (the center position of the clamp head) to facilitate the entry and exit of the pipe string. Then proceed to the next pipe string operation; in addition, it is often necessary to switch between the directions of make-up and break-out during operation, so ...

AI Technical Summary

Problems solved by technology

This conversion process is usually realized by turning the reset shaft manually, which is not suitable for remote or automatic operation. Therefore, a device that can remotely control the rotation of the reset shaft to reset the stop pin is needed to realize the automatic conversion of the screw-on and break-out directions.

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