Double-cylinder double-acting drill rod clamp

Abstract

The invention relates to a double-cylinder double-acting drill rod clamp. The double-cylinder double-acting drill rod clamp comprises a base, a left clamping mechanism and a right clamping mechanism,wherein the left clamping mechanism and the right clamping mechanism are arranged on the base and face each other. Each of the left clamping mechanism and the right clamping mechanism comprises a cylinder body, a front cover connected to the front end of the cylinder body through a front cover bolt, a main shaft arranged in the cylinder body, a disc-shaped piston connected to the rear end of the main shaft and a clamping tile located on the front side of the middle of the front cover. A spacer bush is formed in each cylinder body and divides the cavity of the cylinder body into a spring cavityand a piston cavity located behind the spring cavity. Each spring cavity communicates with the corresponding piston cavity through the middle hole of the corresponding spacer bush. Each main shaft penetrates through the corresponding middle hole. A gap is reserved between each main shaft and the hole wall of the corresponding middle hole. An oil inlet hole is formed in each cylinder body and communicates with the corresponding spring cavity. Each main shaft is provided with a belleville spring in a sleeving manner in the corresponding spring cavity. Each belleville spring is connected betweenthe corresponding main shaft and the corresponding spacer bush. Each piston is located in the corresponding piston cavity. Each main shaft penetrates through a shaft hole in the middle of the corresponding front cover forwards to be connected with the corresponding clamping tile. The double-cylinder double-acting drill rod clamp is simple in structure, fast in action response, large in clamping force, free of eccentricity, easy to disassemble and assemble and more convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of drilling rig equipment, in particular to a double-cylinder double-action drill pipe clamper. Background technique [0002] Drilling rigs are usually equipped with a drill pipe holder, which is used to clamp the drilling tool in the hole to prevent the drilling tool from slipping in the hole. If necessary, it can also cooperate with the movable cutter head to automatically tighten the drill pipe. The gripper is an important part of the drilling rig, and its performance can directly affect the performance, drilling efficiency and drilling quality of the entire drilling rig. [0003] In coal mine drilling, manual grippers are commonly used to clamp drill pipes. However, the existing manual grippers usually have slow action response, insufficient clamping force, and easy eccentricity during the clamping process of drill pipes. Therefore, there is an urgent need in the prior art for a double-cylinder double-a...

AI Technical Summary

Problems solved by technology

[0003] In coal mine drilling, manual grippers are often used to clamp drill pipes. However, the existing manual grippers usually have slow action response, insufficient clamping force, and easy eccentricity during the clamping process of the drill pipe.

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