SU575591A1 - Source of seismic signals - Google Patents

Description

The invention relates to marine cencNfO exploration, in particular, to devices for creating acoustic vibrations in the aquatic environment through the use of detonation of gaseous explosive mixtures.

A source of seismic signals for water areas is known, which uses the detonation of gaseous explosive mixtures, which is a closed neoprene pipe attached to the flanges. Inside the pipe, the cooling tubes pass through. To eliminate secondary 11X impacts, detonation products are brought through a pipeline to the surface of the water 1.

However, the possibility of using such a source is limited due to the constant volume of the explosion chamber, since to make explosions of different power it is necessary to have several sources with different volumes of explosion chambers. Moreover, such a source has a complex structure.

A source of seismic signals is also known, containing a gas supply and initiation unit for the gas mixture, housed in a housing with Koni, uoo6i.ia., Is (ii front end, k, iij uKfjOiinefia elastic shell, km iiGjiiiyc. as a hollow ts1Sh1P (. to; / j.

However, after a few lii.ic-i, the elastic shell of such a junction, -) loses 4 | P |. (Y, which violates the silence of sig1-; alov and, moreover, also constant) the volume of the explosion chamber.

Also known is the seismic signals detonation, which contains 131 cases with annular BfiicTyiia: .sM and an elastic shell with a device, a mechanism for feeding and initiating a gas bursting mixture H.

This source of seismic strings also has a constant volume blasting chamber, which does not allow the parameters of the excited strings to be varied over a wide range.

The purpose of the present invention is to control the parameters of the excited signals.

Claims (1)

For this, one of the annular projections of the housing is adapted to move relative to the other along the housing. for example, using a threaded joint. FIG. 1 shows the design of the proposed source with the movement of one of the projections; Fig. 2 shows the construction of the source with the movement of another protrusion, is more convenient, since it provides I free access to the movable protrusion. The source consists of a housing 1 with an axial channel 2 and a radial hole 3. A flange 4 is fastened to the front part of the housing 1 with a gas inlet 5 and a fire extinguisher 6 with a check valve 7. Axial channel 2 (communicating with the gas initiator 8 Case 1 is equipped with annular projections 9 and 10, one of them being movable with seals 11; At the other end of the housing 1, a tensioning device is installed, which is a perforated disk 12 with a spring 13, abutting one end against the disk 12, and the other at the flange of the screw 14 annular protrusion 9 (FIG. 1 of the case and the perforated dike 12 are fixedly fixed with collars 15 elastic sheath 16; In the construction of the source in FIG. 2, elastic sheath 16 is fixed on the movable lance of the projection 10. The source works as follows. Before starting, set the required amount of explosive chambers, for which the annular protrusion 10 is moved along the housing 1, for example using a threaded joint, while the annular protrusion 10 will move in or out of the non-movable protrusion 9, By keeping the volume of the chamber formed by the fixed and movable protrusions and the elastic element will decrease or increase accordingly. Using the guide 14, a predetermined tension is created, for which screwing or unscrewing it, the spring is released or compressed, the force of which is transmitted to the disk 12 and through it nl elastic element 16. After this, the source is immersed in an ox. the drawing is not shown) and through fitting 5, reverse valve 7, channels 2 and 3 of the combustible mixture is fed into the explosion chamber. The pressure in the chamber is determined by the hydrostatic pressure and the tension force of the elastic element 16. After the gas supply in the source is stopped using a non-return valve 7, a certain amount of gas is cut off, which the object explodes, for example, using a gas initiator 8, the shock wave through the elastic the shell 16 is transferred to the surrounding space, causing an elastic impulse. As a result of the expansion of the gas, the elastic shell is pressed from the annular protrusion 10 and the gas through the gap formed and through the perforation in the disk 12, disperses into the surrounding space. The ejection continues until the pressure inside the chamber exceeds the hydrostatic pressure and the tension force of the elastic element. For a subsequent explosion, an explosive chamber must be blown, for which gas is fed into the chamber to release the elastic element 16 from the annular protrusion 10 in FIG. 1 and protrusion 9 in FIG. 2, after the end of the purge and stopping the gas supply, the chamber is recharged for the subsequent explosion. The volume of gas cut off in the chamber is the same every time. : This is achieved by the fact that the shape of the I-chamber is kept constant due to the forced tension by the spring 13 of the elastic element. In addition, the spring 13 facilitates the working conditions of the elastic element, since it takes a part of the load during the explosion. Using the proposed source of seismic signals, there is no need to develop and manufacture sources with different J volume of the explosion chamber for the circuits controlling the parameters of the excited signals. The reduction in the number of explosive chambers used in the work also determines the economic effect of the invention. The invention is a source of seismic signals comprising a chamber formed by a housing with annular protrusions and an elastic shell with a tensioning device, a mechanism for supplying and initiating a gas explosive mixture, characterized in that, in order to control the parameters of the excited signals, one of the annular projections is adapted to movements relative to another along the body, for example, using a threaded joint, Sources of information taken into account in the examination. 1, US Patent No. 3480101, cl. 1815, 1969, 2, Application No. 2142642/25, cl. G O1 V 1 / O2, 11.06,75, according to which a positive decision was made to issue an author's certificate. 3, Application No. 2361483,25 Cl, 6 01 V 1/02, 19.05.76, according to which a positive decision was made to issue an author's certificate.