A kind of anti-loosening spherical multi-beam transducer

Abstract

The invention relates to the technical field of seismic exploration, in particular to an anti-loosening spherical multi-beam transducer, which includes a shell, a top cover, a sleeve and an electrode body; the sleeve is sleeved on the upper part of the electrode body, and the shell There is a clamping position in the body, and the sleeve and the electrode body are placed in the clamping position in the housing as a whole. The sleeve and the housing form a discharge chamber, and the discharge chamber is filled with conductive liquid. The lower part of the electrode body is placed in a conductive liquid; the shell is fixedly connected to the top cover, a buffer cavity is provided between the sleeve and the top cover, and an adjustment member is arranged in the buffer cavity. On the one hand, the invention makes the energy conversion condition controllable, which is convenient for test comparison; on the other hand, it can adjust the frequency of the shock wave to meet different geological conditions and survey requirements; and realizes the control of the distance between the discharge electrodes by designing the position adjustment component , to facilitate the comparative analysis of the test and the effective selection of corona and arc discharge, which increases the flexibility of site survey and adjustment.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to an anti-loosening spherical multi-beam transducer. Background technique [0002] The discharge of high-voltage pulses in water will generate instantaneous energy waves. The waveform and frequency of this energy wave are similar to seismic waves, and can be used to simulate seismic waves for mineral resource exploration. The instantaneous energy wave passes through the discharge device and propagates down the stratum, passes through different geological strata for refraction and reflection, and is finally received by the detector to judge or reproduce the ore-controlling structure of the stratum. As the name implies, discharge in water must have a certain water body. For example, in 2009, the Institute of Electrical Engineering of the Chinese Academy of Sciences and the Guangzhou Marine Geological Survey successfully developed the moray 20 kJ electric spark source syst...

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Problems solved by technology

[0003] A discharge electrode disclosed in Chinese patent 200810056793.3, the lower end of the electrode is open, and it is mainly used in the field of marine seismic exploration. It needs a wide water area and cannot be used on land.

Chinese patent 201010541046.6 discloses a phased array electric spark sub-seismic source for seismic exploration. Its bottom is designed as a pyramid structure, and the space formed by the positive and negative electrodes is small. The outer wall of this space is thin, and it is the transition between the two structures. , after multiple discharges, it is easy to break; at the same time, the positive end of the electrode has just touched the surface of the liquid and has not penetrated into it, which is prone to discharge along the surface. It will look for a channel for circulation and release, which will cause insulation breakdown, cable breakage, and damage to the host device in severe cases

In addition, the single-electrode discharge end face is small, and the electrode itself is easily damaged.

An electro-acoustic conversion electrode disclosed in Chinese patent 201510146327.4, after multiple discharges, it is easy to cause the soil to loosen, and it needs to be compacted multiple times; since multiple single-core insulated cables of equal length are bundled and pass through the metal cap and the inside of the device, there is no The transition makes it difficult to fix the position deep into the bottom of the device; because the center conductors of the exposed multiple insulated cables are welded together, the stretching vibration after multiple discharges causes the weld to be easily broken, and the exposure of the weld also increases Possibility of air creeping discharge

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