SU968230A1 - Apparatus for controlling the working motion path of working member of trencher - Google Patents

Description

Union of Soviet

Socialist

Republics

(11) 968,230 in matters of inventions and discoveries (72) Authors of the invention (71) Applicant

DESCRIPTION

Inventions

TO AUTHOR'S CERTIFICATE (61) Additional to author. certificate-wu - (22) Declared 04.29.81 (21) 3284737 / 29-03 with the addition of application No. - (23) Priority -

Published on October 23, 2018. Bulletin No. 39

Date of publication of the description 23.10.82 (51) M. Kl!

E 02 F 9/20 (53) UDC 621 .879.

.443 (088.8)

V.P. Menyaylo, V.A. Ustimets and S.N. Orlovsky! ALL-Union jp PATENT- and

Siberian Scientific Research Institute

The invention is intended for use in reclamation, peat, construction and road machines when performing trenches, drains, canals and ditches.

A device is known for automatically maintaining a given value of the slope of the bottom of the trench, including a digging depth sensor with electrical contacts interacting with a tracer cable stretched along the trench and a hydroshock spreader [1]. .

Such a device has an increased complexity of use and low accuracy due to the accumulation of measurement errors.

The closest technical solution to the technical essence and attainable result to the present invention is a device for controlling the working body digger comprising .otschetny reservoir vy2 space filled with a pair of vessels, a flexible hose connected to the actuating element, designed as a sensor and elektrogidrozolotnika urs _s ^nya I ² ] ·

However, in view of using the bottom of the trench as a reference base, the device accumulates a measurement error during the operation, the coordinates of the bottom of the trench, the absence of the base coordinate (reference signal) in the device leads to additional errors in the profile of the bottom of the trench, the sensitivity of the device is limited by the rate of fluid flow.

The aim of the invention is to provide a given value of the slope of the bottom of the trench by increasing the accuracy and sensitivity of the device. 20 This goal is achieved in that the device for controlling the trajectory of the working body of the excavator-trencher, including a readout tank connected by a flexible hose to an actuator made in the form of an electrohydrosolot, is equipped with pressure and distance traverses connected to the actuator by means of a computing unit moreover, the measuring transducer of the path is connected with a flexible hose.

The drawing schematically shows a device for controlling the trajectory of the working body of the excavator - trencher.

It includes a pressure transducer 1, on the working body 2 of the excavator-trencher 3, connected by a flexible hose 4 with a readout tank 5, installed at the beginning of the laid trench.

A hose filled with a non-freezing liquid in the operating temperature range is wound on a drum 6, where a path-length measuring transducer 7 is also installed. With the measuring transducers 1 and connected via the computing unit, the actuator '(electrohydrosolot) 9, the measuring transducer 7 path is kinematically connected with a flexible hose 4.

The device operates as follows.

The pressure measuring transducer on the working body 2 of the excavator- ³³ trencher 3 generates a signal at its output that is proportional to the height of the liquid column between the level of the reading tank 5 and the position of the pressure transducer ⁴⁰ 1. Flexible hose 4, unwinding from the reel 6 kinematically affects the way the transducer 7 which counts the length of hose 4. The signal from the transducer will measure ⁴⁵ Tel'nykh path 7 is supplied to a computing block forming circuit 8, the output of which forms a reference signal proportional; the length of the completed trench ⁵⁰ and the given slope of its bottom. This signal is then compared on the comparison element of the computing unit 8 with the signal received from the pressure transducer 1. The received mismatch signal arrives at the relay element of the computing unit 8 and, if its value exceeds the selected tolerances for the deviation of the trench bottom profile from the given one, the relay element generates a control signal at its output, which is transmitted through the matching part of the computing unit 8 to an actuating element 9 that controls the position of the working body 2 of the excavator-trencher 3 in a vertical plane.

After the trenching is completed, the trencher 3 returns to the beginning of the route, while the flexible hose 4 is automatically wound on the drum 6.

This design of the device for controlling the trajectory of the working body of the excavator-trencher provides trenching with a given slope of the bottom with minimal tolerances, regardless of the surface topography without special preparation of 25 tracks, does not require the installation of additional equipment and facilitates the working conditions of the excavator operator, since the basic trajectory is calculated according to the signal of the 3Q measuring transducer of the path from the beginning of the trench, and error accumulation is excluded. The coordinate of the bottom of the trench is counted by the value of the liquid column from the level of the reference reservoir. The use of a pressure transducer for measuring the liquid column makes the system leakproof.

Claims (1)

1. USSR author's certificate K, cl. E 02 F 9/20, 1963. .2, Copyright, certificate of the USSR