Cluster type down-the-hole hammer

Abstract

The invention discloses a cluster type down-the-hole hammer. The cluster type down-the-hole hammer comprises a drill rod and a down-the-hole hammer connected with the drill rod, a main air inlet channel is formed in the drill rod, a high-pressure air chamber communicated with the main air inlet channel is arranged on the down-the-hole hammer, an airflow adjusting valve with a valve block and an airflow adjusting hole is arranged between the drill rod and the down-the-hole hammer, and the airflow adjusting hole is closed by the valve block. An air inlet of the airflow adjusting valve communicates with the main air inlet channel, an air outlet of the airflow adjusting valve communicates with the high-pressure air chamber, a flow dividing air chamber is arranged on the down-the-hole hammer, and the opening degree of the valve block on the airflow adjusting hole is adjusted, so that high-pressure air in the main air inlet channel is divided into the flow dividing air chamber. According to the cluster type down-the-hole hammer, when the cluster down-the-hole hammer performs drilling and rock drilling operation in different stratums, air flow can be adjusted in time, so that the rock drilling efficiency is improved, and energy consumption is reduced. The whole linkage structure in the airflow adjusting valve is convenient to assemble and disassemble, a corresponding exhaust channel is arranged only by means of the structure of a down-the-hole hammer shell, no part needs to be additionally arranged, and structural design is reasonable and compact.

Description

Technical field: [0001] The invention relates to a cluster type down-the-hole hammer. Background technique: [0002] In the field of large-diameter drilling and rock drilling, in order to improve the operating efficiency of drilling rigs, cluster-type DTH hammers are often used for operations. Cluster-type DTH hammers need centralized gas supply during operation. The flow and pressure of the gas distributed to each DTH hammer in the cluster DTH hammer should be adjusted continuously according to the change of the rock formation. When the hardness of the rock formation is high, high-pressure and large-flow gas should be used to improve rock drilling efficiency. When the hardness of the rock formation is not large, low-pressure, low-flow gas can be used to adapt to the rock formation. [0003] At present, when cluster DTH hammers are used for operations, high-pressure, large-flow, and high-power air compressors are often used to centrally supply air. When the hardness of the ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the concentrated air flow cannot be adjusted during the drilling and rock drilling operation of the existing cluster type DTH hammer, and provide a cluster type DTH hammer with adjustable air flow to improve the rock drilling performance of the cluster type DTH hammer. efficiency

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