SU1613986A1 - Apparatus for exciting seismic waves - Google Patents

Abstract

The invention relates to means of geophysical prospecting, namely, devices for exciting seismic waves. The goal is to increase reliability, compactness, providing the ability to adjust the energy of excited seismic waves. The device has a trigger mechanism, to the body of which the handle, the inner tube and the hinged release handles are rigidly fastened, fastened with levers, on which are made contacting annular cheeks connected by an annular elastic element. The auxiliary tension spring is rigidly connected to the shells of the device and the trigger mechanism and is coaxially located with the working spring that is mounted on the shank of the firing pin. A rusk is installed on the thread of the drummer shank with the ability to interact with the annular cheeks and move along the thread of the shank along it. 3 il.

Description

The invention relates to means of geophysical prospecting, namely, devices for exciting seismic waves, and can be used in mine seam prospecting conditions of mining coal seams.

The circuit of the invention is to increase reliability, compactness, and also to provide the possibility of adjusting the energy of the excited seismic vibrations.

Fig. 1 is a schematic diagram of the device; Fig. 2 is the same at the time of charging the working spring; on fig.Z - the same, in the initial position with the cocked working spring.

The device consists (fig.O of the housing 1, the trigger housing

2, a hollow hammer 3, a working spring 4 and an anvil 5 into which a sensor for the moment of impact is mounted, for example, a piezoelectric element (not shown), and a guide rod 6, coaxial with housing I and rigidly attached, for example, on threads with anvil 5. The hollow impactor 3 is provided with a shank 7, made in the form of a tube, mounted coaxially with the tubing bar 6 and freely moving along it. A rusk 8 moves along the shank 7 along the thread. The trigger mechanism consists of a body 2, to which a handle 9 is rigidly attached to send the device into the well and bring it to working condition and the release handle

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10 and n on hinges 12, rigidly connected to a locking mechanism, made of a valuable juxtaposed ring jaws 13, which are mounted on 5 chagas and fastened with an elastic ring element 14 (rubber ring). The normal position of the annular cheeks 13 is compressed. Between the lugs 15 of the housing 1 and the lugs 16 of the housing 2 of the trigger mechanism there is an auxiliary tension spring 17, with its ends fixed on the lugs. Between the stop 18 of the inner pipe 19 of the trigger mechanism and the striker 3, the shank 1 7 is fitted with a working spring 4. The anvil 5 is rigidly fixed, for example, removable nozzles 20 of various shapes are attached to the thread. Trigger arms 10 and 11 rotate around hinge 12.2.

The normal state of the handle is downward, which is ensured by the compression of the cheeks 13 by an elastic ring element 14. The wire from the sensor of the moment of impact is passed through the hole in the guide tube 6 and the hole 21 in the handle 9 (not shown).

The device works as follows.

To bring the device into operation

The position (Fig. 2) of the nozzle 20 rests on the wall of the mine workings or the bottom hole. By pressing the handle 9 in the longitudinal direction, the auxiliary spring is simultaneously extended by 17 and the working spring 4 is compressed. The forces on which the springs 17 and 4 are calculated are referred to as 1/10. The inner tube 19 moves along the shank 7 of the hammer 3,

is a trigger mechanism, the annular cheeks 13 of which are put on and snap onto the cracker 8. Then the force is released. Under the action of the auxiliary spring 17, the trigger mechanism is pulled along the housing 1 and behind the hv-shaft 7 pulls the shock with the working spring back to its original position (Fig. 3). The impactor 3 moves along the guide rod 6 by a value equal to the working deformation The working spring. 4. The magnitude of the deformation of the spring 4 is regulated within the prescribed limits by a special worn through the hole 21 on the woodworker 8 (rotating the cracker 8, move it, for example, along the thread along the shank 7 of the hammer 3)

Claims (1)

To excite oscillations (lowering the working spring), they press on the arms 10 and 11, which, while hanging around the hinges 12, unfasten the annular cheeks 13, thereby freeing the cracker 8 from engaging with the annular cheeks 13. The compression spring 4 unclamping It is pushed by the hammer 3, which, when struck by anvil 5, excites oscillations in it, which are transmitted through the nozzle 20 into the rock. Since the material of the nozzles 20 can have a different modulus of elasticity, on which, as is well known, the frequency of oscillation excitability, by adjusting the working strain of the spring 4 change the magnitude of the impact force, with a change in the material of the nozzle 20 — the spectrum of the excited oscillations. Invention Formula A device for exciting seismic waves, comprising a housing with a working spring, a hammer, a clamp, a hollow rod and a trigger mechanism located therein, characterized in that, in order to increase reliability, compactness, and also to provide the possibility of adjusting the energy of the excited seismic vibrations, the trigger the mechanism is made in the form of two coaxially arranged pipes rigidly fastened to each other, the outer of which forms the body of the trigger mechanism and covers the device's body, and the inner mouth axially displaced axially inside the latter, the inner tube of the trigger mechanism is connected by means of a working spring covering the drummer’s shank to its upper part, while a tension spring is attached between the device body and the trigger body; the mechanism is rigidly strengthened by a fixed handle and pivotally two handles of descent, equipped with levers with annular cheeks, which are arranged to interact with protrusions with a hook mounted on the thread of the striker shank with the possibility of moving along it along the thread, while the annular cheeks of the descent handle are connected to each other by an annular elastic element. / 7777777 /////// figure 1 Shchi2.1