SU850540A1 - Rope tension monitoring apparatus - Google Patents

Description

one

The invention relates to the mining industry, in particular, to lifting jacks with brake and conductor cables, and can be used to control the tension of the latter.

A device for measuring a rope is known, comprising a frame and associated with non-mobile and mobile supports, a drive, a transducer and an indicator, the supports for the ropes being made with a profile surface for contacting the latter with the surface of the interdisciplinary cavities l.

Rope tension measurement is carried out with the machine being suspended. In this case, the movable support of the cable is clamped between the fixed supports, due to this bending.

The closest to the invention in its technical essence and the achieved result is a device for controlling the tension of the ropes, comprising a case with curvilinearly-curved extensions and onopHbfMH elements that are connected with the rope, and a measuring element connected to the indicator f2.

However, this device is not sensitive enough.

The purpose of the invention is to increase the sensitivity.

This goal is achieved by the fact that in the device, the housing walls are made with different thickness, and

10 measuring element is made on strain gauges installed in the place of the minimum wall thickness.

. The invention further illustrates the pulp, where the presented device for

5 tension control ropes, general view.

Claims (2)

The device contains a metal case 1 detachable along the vertical axis with supporting elements 2 at the ends and bolts 3 for clamping the rope 4 passing through the shock absorber 5 and fixed in the lower part of the trunk with the help of the clamp 6 on the beam 7, semiconductor sensors 8, curved into a curvilinear -curved surface 9, with walls of different thickness Yu, the balance node 11, intermediate turnips 12 block contacts 13, indicator 14 and electric network 15. The device works as follows. When mounted on the rope 4 of the housing 1, the extreme supporting elements 2 are clamped by the bats 3, after which the rope in the lower part of the trunk is tightened by a certain force and fixed by the clamp 6 to the beam 7. or to another node. When the rope is loosened or pulled out of the jamb 6, the curved-curved surface 9 and especially at the minimum thickness of the housing 10 is subjected to compression and bending deformations, as a result of which the semiconductor strain gauges 8 change their resistance and the balancing node 11 allows current to flow through the coil of the intermediate relay 12, which is blocked by the contact 13 to the network 15 of the indicator 14 and after which the lifting installation must stop. To return to the working position of the device, the rope must be pulled with the effort required for normal operation. 0 The proposed cable tensioning device has a constructive simplicity, is cheap to manufacture and has a high sensitivity, which makes it possible to increase the safety of work on lifting installations with rope parachutes and cable conductors. Claims An apparatus for monitoring rope tension, comprising a housing with curved-curved walls and supporting elements in contact with the rope, and a measuring element connected to an indicator, characterized in that, in order to increase sensitivity, the walls are made with different thicknesses, The measuring element is made on the tensor sensor ah installed in the place of the minimum wall thickness. Sources of information taken into account in the examination: 1. USSR author's certificate N9 590620, cl. GOIL 5 / O4, 1975. 2. USSR author's certificate N 311155 cl. G01 L 5 / О4, 1970 (prototype).