SU1342856A1 - Apparatus for monitoring rope tension of mine hoist - Google Patents

Abstract

The invention relates to devices for controlling the tension of a rope in a mine hoisting plant and provides improved accuracy. In normal operation, transceiver 1 sends signals to loop antenna 2 with a constant frequency. The signal sent to the antenna 2 induces an emf in the resonant circuit of the receiver 5. The transducer diode 8 oscillates at the second harmonic frequency in the contour of the transmitter 9. The frequency of the transmitter 9 varies depending on the tension of the rope 12 due to the position of the moving core 15 of the coil 11, the winding of which is part of the inductance of the LC circuit of the transmitter 9. Transmitter 9 induces an emf in a loop antenna 2, which is received by transceiver 1, converted and transmitted to display unit 3. On the display unit 3, the frequency is numerically displayed in proportion to the tension of the rope 12. In the emergency mode of operation when the rope is loaded or over-tensioned, 12 ser ((L

Description

The ip bitchip is one of the most severely nojiomcFfnii and yxo / yi bits of the frequency of the transmitter 9 outside the received frequency band of the transceiver 1. This information is displayed on the block

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The invention relates to a lifting machinery industry, in particular to rope tension monitoring devices of mainly mine lifting installations.

The purpose of the invention is to improve accuracy.

The drawing is given a functional diagram of the proposed device.

The device consists of a transceiver 1, a loop antenna 2 of which is laid along the shaft of the shaft, and an indication unit 3. On the lifting vessel 4 there is a receiver 5 consisting of a capacitor 6 and a coil 7 and a transmitter 9 connected to it via a diode 8, consisting of a capacitor 10 and a coil 11, which is made of two windings 11.1 and 11.2, and the resonant frequency f, of the receiver 5 is constant (f const), and the resonant frequency f of transmitter 9 varies depending on the tension of the rope (f. Var). The rope 12 is fixed to a rope tension sensor, in the case 13 of which a spring 14 and a recording element consisting of a coil 11 and a moving core 15 are placed, the coil 11 being attached to the case 13, and the core 15 being attached to the spring 14 11, the winding 11.2 of which is connected in series with the winding 11.1.

A device for measuring the tension of a rope in a mine lifting installation operates as follows.

In normal operation, transceiver 1 sends signals to loop antenna 2 at a constant frequency f. The signal, sent to antenna 2, induces an emf in the resonant oscillatory circuit of the receiver 5. The oscillatory circuit of the transmitter 9 receives energy through the circuit at 3 EASYCLES with D.CH P.ISSHPI (1H, 1ich to I im il il ui Tib ((1. hrlshgch .myi Ch o tn) - mosaic polT Smnsh Maiiinniii. Pps y rustiyapar anar) 1I uroGi T p r rin ich atastg and outgoing comp. p. 1 ill.

The capacitor 5 and the diode 8 and in turn induces the emf of the alternating frequency f into the antenna 2. The frequency f changes depending on the position of the core 1 5 and coil 11, but even with this position of the core 15 the frequency f is not equal to the frequency f (f2 jf Signal

The tein 2 transceiver 1 is converted and transmitted to display unit 3. On Olox 3 tracks 11Д1И, the frequency values f, proportional to the rope tension, are displayed in digital form. The driver can visually determine the degree of loading of the lifting vessel 4 and record the load being lifted. In the event of an overload of the lifting vessel, the Maipschist maneuvers at lower speeds and can provide the necessary safety when operating the lifting machine. In the case of a down vessel moving down, the rope 12 is weakened, which allows the spring 14 to bend under the action of internal forces, and the core 15 attached to the spring 14 leaves the coil 11. The resonant frequency f of the contour of the transmitter 9 increases and goes out of band. the received frequencies of the transceiver 1. In case of lifting the lifting vessel, excessive tension of the cable 12 causes the spring to expand and the core 15 fully enters the coil 11. The resonant frequency The fj of the contour of transmitter 9 decreases and falls outside the received frequency band of transceiver 1. Since transceiver 1 is tuned to a variable frequency band of 2, in both cases the absence of a signal from transmitter 9 signals the tension of capat 12 and this information is displayed on the display unit 3 and acts on the circuit of the brake on the brakes. After eliminating the accident during normal tension of the cable 12, the device returns to its original state.

The application of the proposed device, due to the expansion of its functionality, contributes to improving the safety of the lifting installation and allows you to continuously monitor the performance of the lift.

Claims (1)

Invention Formula A device for controlling the tension of the rope of a mine lifting installation, Or N. Lazarenko 4597/21 Compiled by L. Reznikova Tehred A. Kravchuk. Corr Sub Circulation 720 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 . Production and printing company, Uzhgorod, Projecto st., 4 five r, f, containing a first transceiver installed permanently, a loop antenna of which is laid along the shaft of the shaft, the output of which is connected to the input of the display unit, and a second receiver and transmitter mounted on the lifting vessel, made in the form of LC circuits connected to each other through a diode and a nat sensor rope, characterized in that, in order to increase the accuracy, the rope tension sensor is made in the form of a coil of inductor mounted on the case with a moving core, rigidly connected to a spring connected followed by the inductance coil of the LC circuit of the second transmitter. Proofreading M. Pozho Subscription