SU1620534A1 - Device for measuring ground cutting strength - Google Patents

Abstract

The invention relates to earth moving equipment and can be used to determine the resistance of bottom soil to cutting by working bodies. The aim of the invention is to improve the reliability of the device. A device for measuring soil resistance to cutting contains a support frame, a trolley with an actuator, a housing mounted on a trolley, a frame with an object table for placing a soil sample, a recording device with a sensing element. In addition, the device is equipped with a lever, a working rod and a compensation weight, and the housing is made horizontal guide holes, with a two-arm lever hinged to the body, rods passed through the horizontal guide holes of the body and one pivotally the ends are fixed on the double-arm lever, the working knife is fixed on the lower stem, installed with the possibility of interaction with the sensitive element of the registering device. 3 silt (Oh

Description

The invention relates to earth moving equipment and can be used to determine the resistance of bottom soil to cutting by working bodies.

The purpose of the invention is to increase the reliability of the device.

FIG. 1 shows the device, a general view; in fig. 2 - body, section; FIG. 3 is a section A-A in FIG. one.

A device for measuring the resistance of the bottom soil to cutting contains a support frame 1 on which a mobile carriage 2 is installed, connected by a cable 3 to a drive 4 and moving along the support frame 1 on rollers 5. A housing 6 is rigidly attached to the carriage 2 Horizontal openings 7 located along the object table 8. In the guide openings 7, a working 9 and a compensating 10 rods are mounted, pivotally connected to the equal-arm lever 11. A working knife 12 is attached to the working rod 9, and 10 - load 13, the mass of which is equal to the mass of the working knife 12. The holder 14 is rigidly attached to the body 6, on which the recording device 15 with the interchangeable sensing element 16 is mounted. The additional frame 17 with the subject table 8 located in the support frame 1 is rigidly attached to a plane perpendicular to the support frame 1. On the object table 8, an insert 18 is fixed, made of a plastic pipe, cut along the longitudinal axis into two equal parts. The soil core is located inside the liner 18. fixed on the subject table 8.

TO

with

C7 CL 4

The device works as follows.

Selected core of the bottom of the soil is removed from the ground receiver with removable liners. String, passes it into the groove between the two inserts 18, cut the core into two equal parts and set in a horizontal position. Then the core liner 18 is secured to the object table 8 and the cutting resistance of the bottom soil is measured.

The cutting resistance of the bottom soil is measured by a working knife 12, which is mounted on the working rod 9 at a predetermined height relative to the core. The knife 12, together with the housing 6, is driven by the trolley 2 by means of the drive 4 and the cable 3. In contact with the core knife, the front edge of the knife 12 encounters soil resistance, which is transmitted to the working rod 9 acting on the removable sensing element 16 of the recording device 15. During operation Stand 9 and compensatory 10 rods are moved in guide holes 7 parallel to each other, but in opposite directions, since they are hingedly connected by means of equal-arm lever 11.

Under the influence of inertial forces, for example, during measurements of the resistance of the bottom soil to cutting on board the vessel during its rolling, the inertial forces F ,. and F ,, proportional, respectively, to their masses m and t1. The cutting force of the bottom soil, taking into account the inertial forces acting along the core axis, is equal to

F FP ± FK ± F ;,

where Fp is the resistance of the bottom soil to cutting on the stand;

FM m a, a (where a is the acceleration of the knife 12 and the load 13

t is the mass of the knife 12 and its suspension;

T1 - the mass of the load 13 and its suspension. The inertia force ri along the core axis 19 acting on the load 13 is equal in magnitude and opposite in direction to the inertia force FH, since the masses m and m1 are equal, and the direction of their action is mutually opposite. As a result of balancing the inertial forces acting on the working knife 12 and its suspension when cutting soil in the ship's laboratory when the ship is rolling, the recording device 15 fixes the actual resistance of the bottom soil to cutting Fp, which increases the accuracy of the bottom soil research on the bench.

Claims (1)

Invention Formula A device for measuring the cutting resistance of soil, comprising a support frame, a carriage driven on a support frame, a body mounted on a trolley, an additional frame with an object table for accommodating a soil sample, A working knife and a recording device with a sensitive element, characterized in that, in order to increase the reliability of the device, it is equipped with an equal-arm lever, a working rod and a compensation rod with a load, and the body is made with horizontal guide holes, while the equal-arm lever is hinged mounted on the body, rods passed through the horizontal guiding holes of the body and pivotally attached at one end to the two-arm lever, the working knife is fixed to the bottom rod mounted with the air the ability to interact with the sensing element of the registering device. Fi9. 7 7 10 FIG. 2 HZ R & Y5. J one