RU1824606C - Seismic wave source - Google Patents

Abstract

Use of seismic exploration, excitation of seismic waves from the surface of the earth SUMMARY OF THE INVENTION The upper end of the core of the engine is above the liquid level in the cavity of the hermetic housing above the core. A flexible membrane hermetically closing the lower base of the housing is located between the radiating plate and the disk with holes fixedly attached to the housing inside its cavity 1 and /

Description

The proposed device relates to the region of seismic exploration and is intended to excite seismic waves from the soil surface

The purpose of the invention is to simplify the design and increase the reliability of WIS.

The drawing shows the proposed WIS in the context

In the hermetic housing 1 of the WIS, an electric reciprocating motion drive is placed, consisting of an inductor 2 with field windings 3, fixedly mounted to a rigid partition 4 with valves 5, which, in turn, is fixedly fixed to the housing 1 Partition 4 section there is a cavity of the housing 1 on the lower cavity 6 filled with liquid, and the upper cavity 7 filled with liquid and gas. Inside the cylindrical inductor 2, there is a core 8 with a copper ring 9, pressed against the limiter 10 by the spring 11. Inside the housing 1 at the level of its lower base to the side surface the hard disk is fixedly fixed

12 with cells made in the form of through holes and a flexible membrane 13, hermetically closing the lower base of the housing 1 On the inner side, the working surface of the membrane 13 is in contact with the disk 12, a top view of which is shown in section AA, and from the outside with a radiating plate 14 mounted on the soil surface Housing 1 is loaded with a loading mass of 15

In this design, the WIS cavity 7 can be in communication with the atmosphere, and the membrane 13 is sandwiched between the disk 12 and the radiating plate 14, tightly adjacent to it

When current pulses are applied to the windings 3 of the inductor 2, the secondary current is induced in the rings 9 and the core 8 under the influence of electromagnetic forces moves down from the limiter 10, compressing the return spring 11 and creating an overpressure in the cavity 6. As a result, a repulsive force acts on the housing 1 with the loading mass 15 through the partition 4 and on the radiating plate 14 through the flexible membrane 13.

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a moving body 1 with an inertial mass 15. a partition 4 and a disk 12 up, and a membrane 13 with a radiating plate 14 down, deforming the soil and thereby exciting seismic waves. The resulting space between the disk 12 and the membrane 13 through the holes in the disk

12 are filled with liquid.

The liquid level in the cavity 7 is selected so that when the core 8 is moved downward, its upper end is above this level.

After the force impact of the WIS on the soil, the measles 8 under the action of the elastic forces of the compressed spring 11, the housing 1 with a mass of 15 under the influence of its own weight and the plate 14 under the action of the elastic forces of the compressed soil are returned to their original position. In this case, the volume of the cavity between the membrane

13 and the disk 12 is reduced to zero by the flow of fluid through the holes in the disk 12 from this cavity into the cavity 6, ensuring a tight fit of the membrane 13 to the surfaces of the plate 14 and the disk 12.

After the core 8 is returned to its initial position, the valve 5 opens and the volume of liquid that passes through the technological gap between the core and the inductor from the cavity 6 into the cavity 7 when the core 8 is moved downward returns to the cavity b, providing the initial level of fluid in the cavity 6 and 7.

When the WIS is triggered again, the described processes are repeated.

In the proposed WIS, the upper end of the core 8 of the engine 2 is higher than the liquid level in the cavity 7, which eliminates the contact of the liquid with the end surface of the core and cavitation of the liquid when the core 8 is accelerated downward. The WIS membrane 13 with its inner surface is in contact with the disk 12, and the outer one is in contact with the surface of the radiating plate, remaining clamped in the initial position between the disk and the plate. Such a technical solution eliminates the need for excess pressure in the cavity above the core, i.e., allows the cavity above the core to communicate with the atmosphere. This helps simplify the design and increase the reliability of the WIS by eliminating devices for creating, monitoring and maintaining overpressure at a given level.

Claims (1)

SUMMARY OF THE INVENTION Seismic Wave Source Consisting of Inertial Mass and Sealed housing, the cavity of which is divided by a rigid partition and the core of the engine to the lower cavity filled with liquid. and limited by a flexible membrane in contact on the one hand with the radiating a plate, and on the other hand with a liquid, and an upper cavity filled with liquid and gas, characterized in that, in order to simplify the design and increase reliability, on the other hand, the flexible membrane with its working surface1 is in contact with a hard disk in which the cells are made in the form through holes fixed to a sealed enclosure, and the surface of the upper the base of the core is in contact with the gas and is separated from the liquid volume by the side surface, ////// 0 ° l ° $ 00 # o & Oh Ј Vtf O.