SU1402984A1 - Device for exciting seismic oscillations by dropped load - Google Patents

Abstract

The invention relates to geophysics and can be used to excite seismic waves in the ground. The purpose of the invention is to increase efficiency by adjusting the force-impact. The device contains a frame with a drive, a lifting and dumping mechanism, with a falling weight and a lever, one end of which is mounted on the movable axis of the lifting and dropping mechanism, and the other is connected to the falling weight. The lifting and slacking mechanism is provided with an abutment installed with the ability to interact with one of the ends of the lever connected through a movable axis with a flexible link with a falling weight. A traverse is mounted on the frame with the possibility of moving in the vertical plane by means of a screw, and between the falling weight and the traverse there is a spring that is compressed and expanded, pushing the incident weight down while the lever is crushing. As the yoke is moved downward, the spring is compressed more strongly, which allows a signal with a larger amplitude to be obtained. 3 il.

Description

you as

one

The invention relates to geophysics and can be used to excite seismic vibrations by the impacts of a falling load using a record storage system.

The aim of the invention is to increase efficiency by adjusting the impact force.

FIG. 1 schematically depicts a device for exciting seismic oscillations with a falling weight; in I of Fig. 2, the lift-and-drop mechanism; on fig.Z - the same, side view. I The device contains a frame 1 and a drive I installed on the frame of an automobile or other vehicle. The rotational drive is made in the form of a sequentially installed power take-off box, a propeller shaft (not shown) and a gearbox 2. The driven shaft 3 of the gearbox 2 is rigidly connected to a lifting and dropping mechanism, made in the form of a disk 4, which is eccentric on the moving axis

5 is fixed at one end of the lever 6,

and at the other end on the movable axis 7, a flexible bond 8 is fixed, which can be made in the form of a cable. In addition, an eccentric stop 9 located on the disk 4 is installed with the ability to interact with the end of the lever 6, which through a flexible connection of the coupling 8 is connected to a drop weight 10 installed in the guide cylinder 11, in which the spring 1 abuts against the load 10. For translation (devices from the working position into the transport port and limiting the course of the springs 12, the frame 1 is rigidly connected to the Guides 13, along which the yoke 14 moves, is rigidly connected to the guide cylinder 11 and the bandage 15, installed with rotation through m reducer 16. Dn preventing twist cable during lifting and discharging operations to the cross member 14 is disposed The guide rollers 17, and for removing soil razrztaeni when striking the guide cylinder 11 is connected to cable 19 ylitoy t8.

The unit works as follows.

In the initial position, the movable axis 5 with a lever fixed on it

6 is at the lowest point of disc 4, and the stop is at the highest point. When the device operates, the plate 18 is set

0

five

0

five

0

five

with on the ground. This is achieved by turning on the gearbox 16, the rotation is transmitted to the screw 15, which rotates and lowers, entrains the yoke 14, freely moving along the guides 13, the guide cylinder 11 and the plate 19 connected to it with the cable 18. Then motor (not shown) is transmitted to the gearbox 2, on the driven shaft 3 of which the disk 4 is mounted. When the disk 4 rotates, the lever 6, which is offset from the center and fixed to the moving axis 5, rotates simultaneously to the top, and the bearing 5 moves to lower point of disk 4, in where it captures the end of the lever 6 fixed on the movable axis 7 with a flexible link 8, and. moves it to the top point. In this case, the falling weight 1U, suspended on the flexible link 8, moves upward in the guide cylinder 11 and compresses the spring 12. When the end of the lever with the movable axis 7 and the flexible link 8 reaches the top point of the disk 4, the stop 9 and the lever 6 release When the lever 6 is disengaged from the axis 7 and the flexible connection 8, rolling on the rollers 17, under the action of the forces of the compressed spring 12 and the weight of the incident weight 10 falls. A falling load 10 hits plate 18. Then the cycle repeats. In order to receive signals with a larger amplitude, it is necessary to move the yoke 14 to the lower position, and with a smaller amplitude - to raise

0

five

0

five

using it with a screw 15.

Such an embodiment allows the spring to be compressed by a certain amount. The stop for the spring in this device is the yoke; the lower it is above the ground, the stronger the spring is compressed. Therefore, in this device, for each specific case, a specific amplitude of signals can be specified.

Claims (1)

In addition, the efficiency of the device is achieved due to the fact that the end of the lever connected to the cable is not fixed to the disk and allows the falling weight to drop by an amount greater than the diameter of the rotating disk. Invention Formula A device for exciting seismic oscillations with a falling weight, including a frame with a drive, a lifting and dropping mechanism with a falling weight and a lever, one end of which is mounted on the movable axis of the lifting and dropping mechanism, and the other connected to the falling weight, and a spring, characterized in that in order to improve efficiency by adjusting the impact force, the end of the lever is connected to the falling weight by means of a moving axis c with a flexible connection, the lift-drop mechanism is provided with a stop mounted to interact with this end of the lever, and a crosshead mounted on the frame can be moved vertically with a screw additionally mounted on the frame, and the spring is placed between the drop weight and the crosshead. cpue.i 75 7 fS cpus.2 . fB /four sixteen -7 AND V 12