Open-top composite clamp holder

Abstract

The invention discloses an open-top composite clamp holder. An all-hydraulic power head type drilling machine is usually provided with a clamp holder which is mainly used for clamping drilling rigs in holes and preventing the drilling rigs in holes from sliding and can be matched with a power head to automatically disassemble a drill pipe. The invention adopts open-top both-side symmetric arrangement, and two master cylinders are symmetrically arranged on two ends of the center of the clamp holder; a master cylinder piston is arranged in each master cylinder, and a slave cylinder piston is arranged in a slave cylinder; a slip is arranged in the master cylinder; a disc spring is connected with the master cylinder piston which is connected with the slip; a shore is arranged between the slave cylinder piston and the master cylinder piston; the lower ends of two master cylinders are connected with the sleeve, and the upper ends are provided with upper draw bars; the sleeve is arranged on a base and is connected by a base draw bar and a nut. The invention has big opening amount, low starting pressure and simple structure, can automatically center, is conveniently to let pass a thick-diameter drill rig and can clamp the drill rigs during sudden power cut.

Description

Technical field [0001] The present invention relates to an open-top composite gripper, especially a hydraulic gripper used on a full hydraulic drilling rig with linkage function. It is usually fixed on the front end of the feed body of the drilling rig and used for clamping drilling tools in the hole. . Background technique [0002] Full hydraulic power head drilling rigs are usually equipped with clamps, which are mainly used to clamp the drilling tool in the hole to prevent the drilling tool from slipping in the hole. It can also cooperate with the power head to automatically unscrew the drill rod. The clamp is widely used because of its safe and convenient use, large clamping force and adjustable features. [0003] At present, the commonly used hydraulic clamps mainly include normally closed, normally open and composite types. These types of clamps can all realize the function of clamping the drill tool. The normally open structure of the top of the cylinder is widely used, bu...

AI Technical Summary

Problems solved by technology

The normally open structure of the top of the oil cylinder is widely used, but due to the potential safety hazards, it is mostly used in near-horizontal drilling equipment. For the construction of multi-angle, especially the drilling equipment with large elevation angle and large depression angle, the normally closed type is generally used together. Holder, during the construction process, when the power is cut off accidentally, the spring can automatically clamp the drill pipe to ensure that the drilling tool is in a safe state and no drill tool slipping accidents occur. The usual normally closed and compound hydraulic clamps are both It is an overall center through-hole structure. When putting in a long thick-diameter drilling tool, it can only be penetrated through the center hole. Under the restriction of the front drill hole and the rear power head, the putting process is troublesome, and sometimes it is necessary to Opening the power head increases the auxiliary time and workload, and restricts the improvement of construction efficiency

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