SU1283678A1 - Device for exciting seismic waves - Google Patents

Description

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gas to the required pressure. The working fluid is supplied to the cavity 2A and presses the valve 11 to the seal B. By supplying a high-pressure fluid to the pressure cavity 18 and. the gas in chamber A is compressed to working pressure. Then feed into the cavity

25, the valve 11 is detached from the seal 8, the annular channel 20 opens, and the liquid flows into the drain cavity 19. The sleeve 1 hits the ground. Reliability of operation is enhanced by using a hydraulic start source, 2 Il.

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The invention relates to seismic exploration, in particular to devices for exciting seismic waves.

The aim of the invention is to increase reliability in operation.

Figure 1 shows the device in the ready state; FIG. 2 is the same at the moment of seismic pulse radiation.

The device for exciting seismic waves contains a sleeve 1 with a rod 2, a piston 3, in the central channel of which the rod 2 is placed, the piston 3 and the sleeve 1 form a working chamber 4 connected by channel 5 through a valve 6 with a reserve compressed gas cylinder (the cylinder and its pneumatic system do not shown).

The central channel of the piston 3 is made stepped and contains elements of the device that form a hydraulic mechanism and a damper cavity 7. In the bottom of the central channel there is a sealing element 8 held by a spring ring 9. The additional piston 10 is rigidly fixed on the rod 2, which is covered by a cylindrical controlled valve 11. The piston 10 is supported on the rod 2 by the sleeve 12, passing through the partition 13 fixed in the body of the piston 3 by the spring ring 14. On top of the rod the cover 15 is extended, fixed 16 and a locking sleeve 17. As a result, a damping cavity 7 and a hydraulic cavity are formed in the central channel, consisting of pressure 18 and drain 19 cavities connected by an annular channel 20, formed by the outer surface of the valve J1 and the inner surface of the central channel of the piston 3, When lowering the valve 11 channel 20 trans

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Crushes and cavities 18 and 19 are separated. The pressure 18 and the drain 19 hydraulic cavities communicate with the hydraulic system of the base machine through the channels 21 and 22, and the damper cavity 7 with the pneumatic system through the channel 23, The surface of the central channel of the piston 3, the valve 11 and the partition 13 also form the control cavities 24 and 25, communicating with the pneumatic or hydraulic control systems through channels 26 and 27.

The device works as follows. The working chamber 4 and the damper cavity 7 are filled with compressed gas to the required pressure, while the partition 13 is from the cap 15 at a distance compensating for the inertial displacement of the liner relative to the piston when the latter is torn off from the ground. After that, the working fluid is supplied to the cavity 24 and the valve 11 is pressed against the sealing element 8. The gas in the working chamber 4 is compressed by supplying the working fluid under high pressure to the pressure chamber 18. On command from the control panel, the liquid is stopped in the cavity 18 and fluid is supplied into the cavity 25, the valve J1 rises, opening the annular channel 20, causing the liquid to freely flow into the drain cavity 19, under the action. gas compressed in the chamber 4, the piston 3 is rolled upwards, and the sleeve 1 strikes the ground. After the forces from the gases in the working chamber 4 and the damper cavity 7 are equalized, the sleeve 1 is detached from the ground and for some time moves together with the piston 3 upwards.

The mass retraction is extinguished by the suspension mechanisms of the device on the base machine and they smoothly fall onto the ground.

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Claims (1)

Invention Formula A device for exciting seismic waves, containing a sleeve with a rod placed in the central the channel of the piston forming the working chamber with the sleeve is rigidly fixed fi784 On the stem, the cover and the partition coaxial with it, forming a damper cavity with the cover, and a hydraulic cavity with the piston, about the same, so that in order to increase reliability in operation, the hydraulic cavity is rigidly divided an additional piston fixed on the rod to the drain cavity and the pressure cavity, at the bottom of which there is a sealing element, with an additional bore that is wrapped around a cylindrical control valve, the outer surface of which forms the inner surface of the central channel. la of the piston an annular channel connecting the drain and the pressure lumen and the cylindrical controllable valve is arranged to contact H1-Ghani 5 with end yn lotnitelnym element. 2  4The Composer H, Chikhladze Editor M, Pandora Tehred. M.Hodanich Order 7433/43 Circulation 730 Subscription VNIIPI USSR State Committee on cases of discoveries and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Proofreader L. Pilipenko