Automatic hydraulic rock breaking pick

Abstract

The invention discloses an automatic hydraulic rock breaking pick. The pick comprises a pick handle, the front end of the pick handle is provided with a pick tip nuzzling body, the tail end of the pick handle stretches to the inner cavity a pick seat, a valve pocket is arranged in the inner cavity of the pick seat, an annular projection is arranged at one side of the inner wall of the valve pocket close to the front end of the pick handle, the tail end of the pick handle is provided with an annular shaft shoulder adapted to the valve pocket, and the annular shaft shoulder is provided with an annular groove; and the pick tip nuzzling body and the pick handle are axially provided with a spray orifice and a central channel which are mutually communicated respectively, the bottom of the annular groove is provided with a pick handle radial high-pressure water through hole along a radial direction, a micro-damping hole is arranged at one side of the annular shaft shoulder close to the tail end of the pick handle along a radial direction, the pick handle radial high-pressure water through hole and the micro-damping hole are respectively communicated with the central channel, and the pick seat is provided with a high-pressure water inlet hole along a radial direction. The pick allows high-pressure water jet to be directly sprayed from the pick tip, the jet flow to be controllable and the dust suppression effect to be good.

Description

technical field [0001] The invention relates to a self-controlled hydraulic rock-breaking pick, in particular to a self-control hydraulic rock-breaking pick suitable for high-pressure water jet coal shearers, tunneling machines and rock drilling machines. Background technique [0002] At present, ordinary pick-shaped picks cut high-hardness rocks, which have problems such as large dust, sparks that are prone to explosion, difficulty in cooling the picks, and large wear. It is better to use high-pressure water jets and ordinary pick-shaped picks to crush hard rocks. Methods. However, in the prior art, the nozzle and the pick are arranged separately. Due to the influence of factors such as the installation position of the pick of the mining machine, the target distance of the nozzle, and the pressure, the high-pressure water jet cannot effectively act on the broken crack of the pick, and the energy loss is large. , cannot meet the crushing requirements of high efficiency and ...

AI Technical Summary

Problems solved by technology

[0002] At present, ordinary pick-shaped picks cut high-hardness rocks, which have problems such as large dust, sparks that are prone to explosion, difficulty in cooling the picks, and large wear. It is better to use high-pressure water jets and ordinary pick-shaped picks to crush hard rocks. Methods

However, in the prior art, the nozzle and the pick are arranged separately. Due to the influence of factors such as the installation position of the pick of the mining machine, the target distance of the nozzle, and the pressure, the high-pressure water jet cannot effectively act on the broken crack of the pick, and the energy loss is large. , cannot meet the requirements of high-efficiency and low-consumption crushing and the best dust removal effect, and it is difficult to control the jet flow in the downhole, and it is easy to form floods in the downhole, which affects the efficiency of the working face

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