CN2133560Y - Protecting device of mine lift - Google Patents

Abstract

The utility model relates to a slack rope protecting device of a mine lift, which is composed of an infrared light emission tube, an infrared emission tube, an infrared receiving tube and an instrument box body. The infrared emission tube and the infrared receiving tube are adopted to be used as a no-touch type sensor. The signal of the no-touch type sensor can be processed by an electric circuit in the instrument box body. Finally, the slack rope protecting purpose can be achieved by that the controlled safety circuit is started by a powerdown executive circuit.

Description

Protecting device of mine lift

The utility model relates to a kind of infrared, contactless type sensor of adopting and receives the safety device that detects the rope creep protection system.

At present, the rope creep protection of China's coal-mine mine hoist generally adopts travel switch formula sensor, presses travel switch behind the slack rope, connects control and warning circuit, the employing that has size steel rope touch sensor; Big steel rope is pressed onto on the little steel rope during slack rope, connects control and warning circuit by the contact resistance of big or small steel rope.Control is reported to the police and warning circuit is made up of time relay, intermediate relay, electric whistle, and the condition of its action is the connection by sensor.But in actual applications, because various odjective causes, often produce the sensor contact resistance faults such as damages, line interruption that transfinite, make and control and warning circuit can't be connected, normal operation, itself also can break down its control and warning circuit sometimes.These faults can not in time be found and be handled sometimes, until expanding as serious accident.

The utility model adopts infrared at the existing in prior technology problem, receives with the contactless type sensor, has fundamentally overcome the shortcoming of touch sensor; Add self-checking function in circuit, at 24 hours every day, continuous detecting improved reliability greatly; This device is made signal conditioning with the CMOS integrated circuit, has replaced traditional time relay, directly the display delayed time; Dividing up and down, sign indicating number is provided with slack rope, self check, three kinds of indications of inefficacy; Has slack rope and the two kinds of alarm sounds that lost efficacy; Slack rope reaches preset time and promptly cuts off charged power, implements safety arrestment.Promptly know whether normal operation of whole rope creep protection system as long as observe on the panel various indications.

This device is made up of upper and lower sign indicating number sensor and casing.

When slack rope took place, hoisting cable dropped on the holder rope sheave, blocks the infrared ray between luminotron and the light-receiving tube, and instrument sends the police car sound equipment, and timekeeping circuit picks up counting.When reaching preset time, the safety return circuit power supply is cut off in internal circuit action, Hoist Emergency Braking, thus realized the purpose of slack rope, warning, delay cut-off.

Below describe this device in detail referring to accompanying drawing, wherein:

Fig. 1 is the schematic appearance of device.

Fig. 2 is the device circuit block scheme.

Fig. 3～Fig. 8 is a corresponding square frame electrical schematic diagram in Fig. 2 circuit block diagram.

Device adopts case structure, and front and back panels is respectively shown in Figure 1A and Figure 1B among Fig. 1.Among the figure:

LED1 LED4: upper and lower sign indicating number is indicated by light, and is just often bright, goes out during slack rope.

LED2 LED5: upper and lower sign indicating number self check indication, just often bright, go out during inefficacy.

LED3 LED6: upper and lower sign indicating number lost efficacy and indicated, and just often went out, and was bright during inefficacy.

LED7: the arithmetic point of slack rope time showing, the double direct supply of doing is indicated.

SM1 SM2: slack rope to power-off time shows that indication range can be given and being put in 0.01～0.99 second.

AN1: alarm sound disengage button.The light-emitting diode of itself is bright when pressing.

AN2: slack rope outage disengage button.The light-emitting diode of itself is bright when pressing.

Loud speaker: slack rope is reported to the police and Failure Alarm share.Send police car sound during slack rope; Send the medical truck chimes of doom during thrashing, the expression system breaks down, and needs to handle.

X1: connection terminal.Sensor, power supply and charged line insert thus.

MA: amperemeter/ammtr, the working current of indication infrared emission tube.

The circuit block diagram of this device as shown in Figure 2,1 is the pulse transmission circuit among the figure, 2,2 ' be to receive and the slack rope testing circuit, 3,3 ' be failure detection circuit, the 4th, slack rope and failure alarm circuit, the 5th, pulse shaping circuit, the 6th, automatic zero-set circuit, the 7th, show and the time preset circuit, the 8th, the outage executive circuit.

Detailed electrical schematic diagram and principle of work are described as follows:

Fig. 3 is the pulse transmission circuit, by three terminal regulator LM317, and potential device W1, resistance R 3, R4, R5, R6, diode D6, D7, the phase inverter H6 of Schmidt trigger CD40106 and capacitor C 5 are formed.When the input end of phase inverter H6 was low level, mouth was a high level, made aerotron BG1 saturated by resistance R 4, and collecting electrode is that voltage stabilizer LM317 control end voltage is zero.Meanwhile, the high potential of H6 mouth charges to capacitor C 5 by R6, D7, when being charged to the off level of H6, LM317 is open-minded, and luminotron FG1, FG2 launch infrared ray, and C5 is by D6, R5 discharge simultaneously, when being discharged to the H6 on-level, BG1 is full to be closed, and LM317 turn-offs.Make the frequency emission infrared ray of luminotron so again and again by the pulse oscillator.The electric current of luminotron is flow through in the milliampere meter indication.

Fig. 4: be signal reception, slack rope detection and self check, failure detection circuit.Above decoding circuit is an example, and the same sign indicating number of following decoding circuit principle of work is identical, slightly.

Adoptor GM1 is converted to electric signal with the infrared light that receives, and delivers to the input end of phase inverter F1 after aerotron amplifies; Mouth is an active potential, and LED 1 conducting is luminous, and sign indicating number is subjected to light positive normal in the indication, and diode D8 ends simultaneously.When last yard slack rope, steel rope blocks light source, and GM1 ends, BG2 ends, F1 input end current potential step-down, and the mouth current potential uprises, LED1 goes out, and the D8 conducting gives capacitor C 6 chargings by R12, when being charged to electronic switch DK3 on-level, DK3 conducting, the power supply of connection warning integrated package CW9561, send alarm sound, simultaneously, DK4 is open-minded, and count pulse is sent into shaping circuit.

Suppose the fault that is short-circuited as BG2, then the F1 input end is a power line voltage, even steel rope falls, and also can not report to the police outage, i.e. thrashing.The effect of self check and failure detection circuit is exactly the self check pulse detection of pulse transmission circuit emission is come out and to be presented on the panel.This part circuit is by resistance R 9, R10, R11, and luminotron LED2, LED3 reach phase inverter F2, and resistance R 14 is formed.When light pulse arrived, phase inverter F1 mouth was an active potential, and at this moment, capacitor C 7 is through the R10 charging, because charging current is very little, so the input end of F2 is similar to high potential, mouth is an active potential.When the self check pulse arrives, photosensitive tube GM1, aerotron BG2 ends, and the F1 mouth is a high potential.At this moment, C7 is through R9, LED2 discharge, and LED2 is luminous.Because R10 is much larger than R9, thus the C7 charging current much smaller than discharge current, the F2 input end is always high potential.When supposing that the arbitrary element of GM1, BG2, F1 or C5 is short-circuited fault, the F1 mouth is constant active potential.When C7 charged to the F2 on-level, the upset of F2 mouth was high level, and LED3 is luminous, and sign indicating number lost efficacy in the indication.Simultaneously, self check indicator lamp LED2 extinguishes.When LED3 was luminous, the loss in voltage of R14 was delivered to the trigger end of electronic switch DK1, DK2, and warning circuit sends alarm sound.

Fig. 5 gives circuits for showing with the time, counting and pulse shaping circuit.

Show with the time and give circuits by ic chip 4, IC5, phase inverter H4, H5, resistance R 23, R24, R26, toggle switch B1, B2, diode D10～D17 forms, and B1, B2 can omit need not.IC4, IC5 are the six directions one integrated package CL102, as required diode are inserted cooresponding BCD mouth and can obtain giving the time of putting.Reach give the time of putting after, H4 input end current potential uprises, mouth current potential step-down, the H5 output potential uprises, and sends into the LE end of CL102, latchs count results.

Counting and pulse shaping circuit: count pulse is a positive output end of taking from bridge rectifier.The 50HZ alternating current is through the voltage transformer step-down, and D1～D4 rectification becomes the 100HZ pulsating direct current, through the R30 current limliting, and the DW3 slicing, the cycle of obtaining is 0.01 second a trapezoidal count pulse.This pulse enters shaping circuit H1 when electronic switch DK4 conducting, make its output rectangular pulse send into count integration block CL102 positive rise trigger end EN, shows count results by the front charactron.Because cycle of each pulse is 0.01 second, thus pulse number with regard to direct representation the time.

Fig. 6 is the outage executive circuit: by relay ZJ1, and triac BCR, two-way trigger tube 2CTS, photoelectrical coupler GD1, resistance R 1, R2, R33, phase inverter F5 forms.Under the normal circumstances, phase inverter F5 mouth active potential, the GD1 conducting, the BCR conducting, the ZJ adhesive, normal opened contact is connected safety return circuit.Give when putting the time when slack rope reaches, binary pair H4 mouth current potential step-down makes phase inverter F5 mouth current potential be uprised by low, and GD1, BCR end, and ZJ discharges, and safety return circuit disconnects, and has reached the purpose of delay cut-off.With button AN2 press can remove the outage and latch.

Fig. 7 is an automatic zero-set circuit: by binary pair H3, H2, and resistance R 25, R27, R28, diode D18, capacitor C 9 is formed.Just often the H2 input end is a high potential, and the H3 input end is an active potential, and mouth is that the R end of CL102 is high potential, counting machine zero setting.During slack rope, count pulse enters, and Schmidt trigger H2 mouth becomes high potential, through the charging duration (by the charging duration decision of R25, C9) of 1.4ms, and the H3 upset, its mouth becomes active potential, removes the zero setting signal, and count integration block begins counting.But sometimes owing to steel rope vibration or other reason, the time of being in the light does not reach preset time, count pulse no longer enters, the H2 mouth becomes active potential, and the electricity that fills on the C9 is bled off by R28, when putting the on-level to H3, the H3 upset, the output high level, the number of counting on the counting machine is avoided causing accumulated counts by zero setting.

Fig. 8 is slack rope and failure alarm circuit, and by warning integrated package KD9561, aerotron BG4, BG5, electronic switch DK1, DK2, DK3, resistance R 20, R21, R32 form.Direct supply is through R20, the R21 dividing potential drop working power as KD9561.When slack rope, the trigger end of DK3, DK4 simultaneously electric, DK3 connects the power supply of KD9561, KD9561 sends the police car chimes of doom, promotes loud speaker through alarm sound disengage button AN1, the compound amplification of BG4, BG5 and sends sound equipment.When losing efficacy, the pressure drop on the R14 triggers electronic switch DK1, DK2, and DK2 connects the working power of KD9561, and DK1 makes it to send the medical truck alarm sound with the 1 pin ground connection of KD9561, and indicating instruments breaks down, and needs to handle.

Claims (1)

1, mine hoist rope creep protection device, form by infraluminescence pipe, infrared receiving tube and instrument box, it is characterized in that comprising in the instrument box pulse transmission circuit (1), reception and slack rope testing circuit (2,2 '), failure detection circuit (3,3 '), slack rope and failure alarm circuit (4), pulse shaping circuit (5), automatic zero-set circuit (6), demonstration and time preset circuit (7) and outage executive circuit (8); The signal of pulse transmission circuit (1) is received and slack rope testing circuit (2,2 ') receive, receive and slack rope testing circuit (2,2 ') output receive failure detection circuit (3 respectively, 3 '), slack rope and failure alarm circuit (4) and pulse shaping circuit (5), failure detection circuit (3,3 ') output also receive slack rope and failure alarm circuit (4), automatic zero-set circuit (6) and demonstration and time preset circuit (7) are received in the output of pulse shaping circuit (5), demonstration and time preset circuit (7) also receive the output signal from automatic zero-set circuit (6), and the input of outage executive circuit (8) links to each other with the input of demonstration with time preset circuit (7).

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