CN2513832Y

CN2513832Y - Material level-meter for coal truck

Info

Publication number: CN2513832Y
Application number: CN 01262908
Authority: CN
Inventors: 夏焱
Original assignee: Magang Group Holding Co Ltd
Current assignee: Magang Group Holding Co Ltd
Priority date: 2001-09-24
Filing date: 2001-09-24
Publication date: 2002-10-02
Anticipated expiration: 2011-09-24

Abstract

The utility model discloses a level indicator for larry cars, comprising a long probe (5), a short probe (4) and a level-indicator circuit board. The long probe and short probe are respectively mounted on two insulating boards (3), and the insulating boards are fixed onto the steel support (1) on the top of a coal hopper (6); the level-indicator circuit board comprises a power supply circuit (7), a testing circuit (8) and an output control circuit (9). The testing circuit (8) comprises a NOR gate integrated circuit N1 and two groups of input circuits respectively connected to the two gate circuits; the output control circuit (9) comprises two NPN triodes and two relays controlling closedown of the discharging opening and a coal-hopper gate, and the outer casing of the coal-hopper is grounded. The utility model is simple in structure and free of radiation; and capable to check the coal level in the coal-hopper, controls the quantity of coal to be fed into the furnace, and overcomes the problems of hole-blocking and unfilled corner.

Description

Charging car level-sensing device device

The utility model relates to a kind of electronics package that detects coal amount in the charging car.

The present employed level-sensing device insulating requirements height of coking industry, the inner structure complexity, maintenance load is big, is difficult to guarantee normal the use under coke oven furnace roof environment.Have high input when using the γ level-sensing device, the coal car coal bunker can't be avoided external irradiation during use owing to be Open architecture simultaneously, is unfavorable for safe in operation.Then can't find suitable installation site when utilizing super sonic to measure, can't overcome decay and measurement blind area that operating mode causes, can not normally use.

The purpose of this utility model be exactly to provide a kind of and can detect coal position height in the coal bunker, can control the deal of going into the stove coal, simple in structure, safe in utilization, radiationless, can overcome stifled, the charging car level-sensing device device of unfilled corner phenomenon generation.

The technical solution of the utility model is such realization: a kind of charging car level-sensing device device is characterized in: it comprises long probe 5, short probe 4, level-sensing device circuit card; Long and short probe is installed in respectively on two insulcretes 3, and insulcrete is fixed on the steel bracket 1 at coal bunker 6 tops; The level-sensing device circuit card comprises power circuit 7, testing circuit 8, output control circuit 9, testing circuit 8 comprises joint denial gate integrated circuit N1 and connects two groups of input circuits of two gate circuit input end respectively, one group of input circuit is made up of last inclined to one side adjustable resistance and capacitor C 5 and long probe 5 following inclined to one side circuit in parallel, and another group input circuit is made up of last inclined to one side adjustable resistance and capacitor C 2 and the weak point 4 following inclined to one side circuit in parallel of popping one's head in; Output control circuit 9 is made up of two relays of two NPN type aerotrons and control Ma Kou and coal bunker closing gate, the base stage of this two aerotron connects the mouth of joint denial gate N1 respectively, the equal ground connection of emitter, collecting electrode is connected to the circuit series of light-emitting diode and resistance by the line bag power connection of relay at relay line bag two ends; The coal bunker case ground.

Because the utility model is that long and short probe is stretched into the height that comes self-measuring coal position in the coal bunker, when coal reaches the upper and lower limit of setting, length probe and the coal bunker shell resistance between promptly reduces by the conduction of coal, move by the OR-NOT circuit control relay, closing of direct control Ma Kou and coal bunker flashboard, so it is simple in structure, radiationless, guaranteeing that coal is even, the control coal capacity, overcome stifled eye, unfilled corner phenomenon, prevent that aspects such as coal bunker emptying, minimizing coal car operation element amount from playing good effect.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is schematic circuit diagram of the present utility model.

Fig. 2 is a level-sensing device probe installation location scheme drawing.

K among the figure-power switch BX-wire fuse T-voltage transformer BZ-rectifier bridge R1～R9-resistance D1～D4-light-emitting diode C1～C5-chemical capacitor W1, W2-potential device J1, J2-relay BG1, BG2-NPN type aerotron N1-joint denial gate integrated package CD4001 1-steel bracket 2-tie bolt 3---insulcrete 4-weak point probe 5-long probe 6-coal bunker 7-power circuit 8-testing circuit 9-output control circuit

The utility model comprises power circuit 7, testing circuit 8, output control circuit 9.

Power circuit comprises K switch, wire fuse BX, voltage transformer T, rectifier bridge BZ, resistance R 1, zener diode D1 and electrolytic capacitor filter C1, and this power circuit is direct current 12V with alternating current 220V transformation rectifying and voltage-stabilizing.

Testing circuit 8 is to be made of OR-NOT circuit N1, N1 can select CD4001 for use, input end 1 pin of N1 and 2 pin short circuits, 8 pin and 9 pin short circuits, output pin 3 pin, 5 pin, 6 pin short circuits, 10 pin, 12 pin, 13 pin short circuits, 14 pin power connections, 7 pin ground connection are connected to the circuit series of potential device W1 and resistance R 1 between 1 pin and the power supply, be connected to capacitor C 2 between 1 pin and the ground, short probe 4 connects the positive pole of capacitor C 2; Be connected to the circuit series of potential device W2 and resistance R 6 between 8 pin and the power supply, be connected to chemical capacitor C5 between 8 pin and the ground, long probe 5 connects the positive pole of capacitor C 5; 3 pin and 10 pin are connected to capacitor C 3 and C4 over the ground respectively.Be connected to resistance R 3 and light-emitting diode D2 circuit series between 4 pin and the ground, be connected to resistance R 5 and light-emitting diode D3 circuit series between 11 pin and the ground.

Output control circuit 9 is made of NPN type aerotron BG1, BG2 and relay J 1, J2, the equal ground connection of the emitter of aerotron BG1, BG2, base stage is connected to resistance R 4 and R8 respectively and between mouth 3 pin of integrated package N1,10 pin, be connected to the line bag of relay J 1 and J2 between collecting electrode and resistance R 1 left end respectively, the two ends of line bag respectively and be connected to resistance R 7 and light-emitting diode D4 series arm and resistance R 9 and the series arm of sending out diode D5 first, the contact switch of relay directly goes to control closing of Ma Kou and coal bunker flashboard.

This level-sensing device is to utilize the electric conductivity of coal that the gate circuit incoming signal is changed.Under the no coaly attitude, after power unit charged to electric capacity, the gate circuit input was a high potential in the coal bunker, and output is active potential, and relay is failure to actuate; When in the coal bunker coal being arranged, coal contacts with probe and forms the loop, and behind the capacitive strike, the gate circuit input is an active potential, then exports high potential, the actuating of relay, thus detect whether coal and coal position height are arranged in the coal bunker.

Have under the coaly attitude: U _Input=12 * R _Coal/ (R _Coal+ R _W1+ R ₂) ≈ 0 (V) (active potential)

Under the no coaly attitude: U _Input=12 * R _C2/ (R _C2+ R _W1+ R ₂) ≈ 12V (high potential)

Charging rate depends on the numerical value of W1, R2, C2 and W2, R6, C5.

The long and short probe on the steel structure support 15,4 links to each other the probe wire that level-sensing device inside picks out in the coal bunker 6 with being installed on, probe adopts the steel rope of 1Cr13Ni9Ti material Φ 5 to make, be fixed on (assurance probe and the insulation of coal car steel structure) on the steel bracket 1 by insulcrete 3, utilize its sagging naturally characteristic and finish detection to the coal position, its length is determined according to technological requirement.

The relay J 1 of this device, the contact switch of J2 the closing of direct control Ma Kou and coal bunker flashboard after drawing, and with the signal indication of light-emitting diode.

Claims

1, a kind of charging car level-sensing device device is characterized in that: it comprises long probe (5), short probe (4), level-sensing device circuit card; Long and short probe is installed in respectively on two insulcretes (3), and insulcrete is fixed on the steel bracket (1) at coal bunker (6) top; The level-sensing device circuit card comprises power circuit (7), testing circuit (8), output control circuit (9), testing circuit (8) comprises joint denial gate integrated circuit N1 and connects two groups of input circuits of two gate circuit input end respectively, one group of input circuit is made up of the last inclined to one side adjustable resistance following inclined to one side circuit in parallel with capacitor C 5 and long probe (5), and another group input circuit is made up of the last inclined to one side adjustable resistance following inclined to one side circuit in parallel with capacitor C 2 and short probe (4); Output control circuit (9) is made up of two relays of two NPN type aerotrons and control Ma Kou and coal bunker closing gate, the base stage of this two aerotron connects the mouth of joint denial gate N1 respectively, the equal ground connection of emitter, collecting electrode is connected to the circuit series of light-emitting diode and resistance by the line bag power connection of relay at relay line bag two ends; The coal bunker case ground.

2, a kind of charging car level-sensing device device according to claim 1, it is characterized in that: described long and short spy (5), (4) are to be made by steel rope.

3, a kind of charging car level-sensing device device according to claim 1 and 2, it is characterized in that: described joint denial gate integrated circuit N1 is made of CD4001.