Centering device applicable to large hydraulic dismantling machine

Abstract

The invention relates to a centering device applicable to a large hydraulic dismantling machine, consisting of jack catches and a fixing member connected with the jack catches. Each jack catch consists of a base and a plurality of bulges arranged on and vertical to the base; the bulge is also provided with an inward V-shaped opening concave; the jack catches have a number of two and are mounted on the same horizontal line; during installation, the V-shaped openings of the two jack catches are opposite to each other and distributed in an interlacing way. By additionally setting a jack catch centering device on an ordinary jaw, the accurate location can be ensured when the hydraulic dismantling machine detects tubular column tools and the tubular column tools can be protected better.

Description

technical field [0001] The invention relates to the field of large hydraulic dismounting machines, in particular to a centering device. Background technique [0002] The hydraulic dismantling machine is mainly used for the installation, maintenance and testing of tubular tools in various departments of petroleum geology. It is an indispensable large-scale equipment for disassembling and testing drilling tools and downhole tools. [0003] Normally, when making up and breaking down tools, the main tong and auxiliary tong are used to turn the buckle. The clamping device adopts the current international advanced "six-cylinder radial uniform distribution" method, and the special distribution equipment ensures six clamping The flow and pressure of the oil cylinder are consistent so that the clamped pipe is evenly stressed and not easily deformed. However, the six cylinders of the current oil circuit control system (a total of twelve cylinders at the front and rear) only use a sin...

AI Technical Summary

Problems solved by technology

However, the six cylinders (12 cylinders at the front and rear) of the current oil circuit control system only use a single cylinder throttle valve to adjust the flow rate, the adjustment efficiency is very low, and the accuracy of concentricity and synchronization is not high, which is the coexistence of the same type of equipment at home and abroad.

The non-concentricity of the front and rear main and auxiliary jaws sometimes reaches 2-20mm. Although there is a compensation gap, it is easy to cause damage to the screw buckle, or even twist the pipe.

[0004] The misalignment is solved from the hydraulic aspect, and some use foreign high-precision compensation valves or synchronizers. Regardless of the fixed volume or constant flow of the tight ring system, the price is expensive, and the proportional speed control valve controlled by a single cylinder is used, coupled with electrical control. Board, but also to invest nearly 200,000, manufacturers are discouraged

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