Automatic descent control device for high-pressure gas impact hypocenter

Abstract

The invention relates to an automatic descent control device for a high-pressure gas impact hypocenter. The automatic descent control device comprises an air pressure chamber, an airflow valve, a guide pull rod, an air pressure chamber base, an air pressure chamber bottom cover, an airflow circulation valve block, a valve block baffle and a fixing bracket; the upper end of the air pressure chamber is opened, and the air pressure chamber bottom cover is mounted at the lower end of the air pressure chamber and mounted on the fixing bracket through the air pressure chamber base; the airflow valve is matched and connected in the air pressure chamber, the lower end of the airflow valve is fixedly connected with the guide pull rod, the lower end of the guide pull rod penetrates through a center hole of the air pressure chamber bottom cover and is connected with a hypocenter hammer body, and the guide pull rod is in sealing connection with the center hole of the air pressure chamber bottom cover; and the airflow circulation valve block and the valve block baffle are mounted on the lower end surface of the airflow valve. By means of the automatic descent control device, the time difference produced when the hypocenter hammer body impacts the ground for the first time can be effectively prolonged, so that energy of elastic waves produced when the hypocenter hammer body impacts the ground for the second time can be reduced, and the elastic waves can be prevented from influencing effective recording; and rigid collision of the hypocenter hammer body can be effectively reduced, the fatigue of part materials can be reduced, and the service life of the hypocenter hammer body is prolonged.

Description

technical field [0001] The invention relates to an automatic slow-down device for a seismic source excited by seismic exploration, in particular to an automatic slow-down device for high-pressure gas impacting a seismic source. Background technique [0002] There are many types of elastic wave excitation sources in the engineering seismic exploration industry. The urban high-pressure gas shock source does not require special vehicles, is flexible and maneuverable, and can save construction costs; during urban construction, it is not limited by the construction site; fully automatic control, easy to operate, and high construction efficiency; large impact energy, Rich in high frequency, instantaneous impact force greater than 3t, and strong anti-interference ability, it is suitable for elastic wave excitation in urban seismic exploration by reflection wave method, refraction wave method, refraction tomography method, and multi-channel transient surface wave method. However, t...

AI Technical Summary

Problems solved by technology

However, the impact of high-pressure gas on the hammer body of the source is prone to secondary excitation shocks, and the secondary excitation elastic waves formed interfere with effective seismic records.

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