CN210065642U

CN210065642U - Coal charging amount monitoring device for tamping coke oven

Info

Publication number: CN210065642U
Application number: CN201920713621.2U
Authority: CN
Inventors: 贾亮; 叶建峰; 崔玉龙
Original assignee: Shanxi Haoye Heavy Machinery Co Ltd; Shanxi Xinhaoye Heavy Machinery Co Ltd
Current assignee: Shanxi Haoye Heavy Machinery Co Ltd; Shanxi Xinhaoye Heavy Machinery Co Ltd
Priority date: 2019-05-18
Filing date: 2019-05-18
Publication date: 2020-02-14
Anticipated expiration: 2029-05-18

Abstract

The utility model relates to a tamping coke oven coal charge monitoring device belongs to tamping coke oven technical field, specifically including fixing the measurement support in the coal supporting plate top, be fixed with a plurality of measuring probe on the measurement support, measuring probe arranges along briquette length direction, measuring probe is connected with signal detection processing unit, signal detection processing unit is connected with tamping coke oven major control system, the utility model discloses simple structure, convenient to use can real-time detection briquette length, automatic alarm.

Description

Coal charging amount monitoring device for tamping coke oven

Technical Field

The utility model relates to a coal charging amount monitoring device of a tamping coke oven, which belongs to the technical field of tamping coke ovens.

Background

At present, due to the fact that a plurality of artificial influence factors exist in the coal cake tamping process, the actual size of the coal cake often cannot reach the standard size, and the coal charging amount is small, so that the yield of the coke oven cannot reach the standard. According to statistics, the annual output lost due to human factors of coal loading operators is about 3 percent, and the lost output value of 5.5 m stamp-charging coke oven with the standard annual output of 120 ten thousand tons is about 6000 ten thousand yuan.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem existing in the prior art, the utility model provides a tamping coke oven coal charging amount monitoring device which has simple structure and convenient use, can detect the length of coal cakes in real time and can automatically alarm.

In order to achieve the purpose, the technical scheme adopted by the utility model is a tamping coke oven coal-charging amount monitoring device, which is characterized in that: the coal-tamping coke oven main control system comprises a measuring support fixed above a coal supporting plate, wherein a plurality of measuring probes are fixed on the measuring support and are arranged along the length direction of a coal cake, the measuring probes are connected with a signal detection processing unit, the signal detection processing unit is connected with a main control system of a tamping coke oven, the signal detection processing unit comprises a driving circuit, an analog switch circuit, a C/V conversion circuit, a rectifying and filtering circuit, a subtraction circuit, an amplifying and filtering circuit, an analog-to-digital conversion circuit and an MCU processor, the driving circuit is connected with the input end of the measuring probes through the analog switch circuit, the output end of the measuring probes is connected with the signal input end of the C/V conversion circuit through the analog switch circuit, the signal output end of the C/V conversion circuit is connected with the subtraction circuit through the rectifying and filtering circuit, and the signal output end of the subtraction circuit is connected with the signal input end of the amplifying and, the signal output end of the amplifying and filtering circuit is connected with the MCU processor through an analog-to-digital conversion circuit, the signal input end of the analog switch circuit is connected with the MCU processor, and the MCU processor is connected with a tamping coke oven main control system through a wireless module.

Preferably, the driving circuit comprises an active oscillator and a low-pass filter circuit, wherein the active oscillator is used for providing 1MHz alternating current signals, and after filtering processing of the low-pass filter circuit, sinusoidal voltages of 1MHz and 1V are obtained.

Preferably, the measuring probe is a laser sensor or an infrared sensor.

Preferably, the main control system of the tamping coke oven is also connected with an alarm.

Preferably, the analog switch circuit adopts an ADG1212 which supplies power with +/-15V and two channels.

Compared with the prior art, the utility model discloses following technological effect has: the utility model discloses simple structure, convenient to use adopts along a plurality of measuring probe of coal slab length installation, through the length of measuring probe real-time detection coal cake, then gives the MCU treater with coal cake length signal transmission, and the MCU treater gives the tamping coke oven master control system with signal transmission, reports to the police and interlocking control. Meanwhile, the signal detection processing unit subtracts the measuring signal of the measuring probe from the initial state signal to obtain the sensitivity change value of the sensor, so that the signal blocking effect is achieved, the processing of amplification and the like of useful signals can be facilitated, and the higher detection sensitivity is obtained.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a control schematic block diagram of the present invention.

Fig. 3 is a circuit diagram of the C/V conversion circuit, the rectifying and filtering circuit, and the subtraction circuit of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in figures 1 to 3, a coal charging amount monitoring device for a tamping coke oven comprises a measuring bracket 1 fixed above a coal supporting plate, a plurality of measuring probes 2 are fixed on the measuring bracket 1, the measuring probes 2 are arranged along the length direction of a coal cake, the measuring probes 2 are connected with a signal detection processing unit, the signal detection processing unit is connected with a main control system of the tamping coke oven, the signal detection processing unit comprises a driving circuit, an analog switch circuit, a C/V conversion circuit, a rectification and filtering circuit, a subtraction circuit, an amplification and filtering circuit, an analog-to-digital conversion circuit and an MCU processor, the driving circuit is connected with the input end of the measuring probe through the analog switch circuit, the output end of the measuring probe is connected with the signal input end of the C/V conversion circuit through the analog switch circuit, the signal output end of the C/V conversion circuit is connected with the subtraction circuit through the rectification and filtering circuit, the signal output end of the subtraction circuit is connected with the signal input end of the amplifying and filtering circuit, the signal output end of the amplifying and filtering circuit is connected with the MCU processor through the analog-to-digital conversion circuit, the signal input end of the analog switch circuit is connected with the MCU processor, the MCU processor is connected with the tamping coke oven main control system through the wireless module, and the tamping coke oven main control system is further connected with an alarm.

The utility model discloses well measuring probe is laser sensor or infrared sensor, and the mounted position is nimble, combines the site condition, can arrange a plurality of probes along briquette length direction, and quantity is more, and the precision is higher. The C/V conversion circuit converts alternating current excitation current received by a sensitive end of the sensor into an alternating current voltage signal, the rectification and filtering circuit mainly rectifies the alternating current voltage signal into a direct current signal, half-wave rectification is carried out through a diode to obtain an alternating current signal of a positive half period, and then the direct current signal is obtained through a second-order positive feedback active filter; the subtraction circuit blocks the direct current signal, then the direct current signal is amplified by the amplifying and filtering circuit, and the direct current signal is converted into a digital signal through the analog-to-digital conversion circuit and transmitted to the MCU processor. And the MCU processor transmits the coal cake length signal to a tamping coke oven master control system in real time. And when the coal cake length does not reach the alarm standard, the main control system of the tamping coke oven adjusts the action of the tamping machine and the action of the feeder in real time according to the coal cake length signal until the coal cake meets the requirement.

The driving circuit comprises an active oscillator and a low-pass filter circuit, wherein the active oscillator is used for providing 1MHz alternating current signals, and 1MHz and 1V sinusoidal voltage is obtained after filtering processing of the low-pass filter circuit, so that field energy of a sensitive space is improved. The analog switch circuit adopts ADG1212, the power supply of the analog switch circuit is +/-15V, the on-state capacitance of the analog switch circuit is smaller and is 1pF, the influence on a subsequent capacitance sensor is smaller, and different driving and sensitive electrode time-sharing multiplexing work can be met by controlling channel switching.

The foregoing is considered as illustrative and not restrictive of the preferred embodiments of the invention, and any modifications, equivalents and improvements made within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims

1. A tamping coke oven coal-charging amount monitoring device is characterized in that: the coal-tamping coke oven main control system comprises a measuring support fixed above a coal supporting plate, wherein a plurality of measuring probes are fixed on the measuring support and are arranged along the length direction of a coal cake, the measuring probes are connected with a signal detection processing unit, the signal detection processing unit is connected with a main control system of a tamping coke oven, the signal detection processing unit comprises a driving circuit, an analog switch circuit, a C/V conversion circuit, a rectifying and filtering circuit, a subtraction circuit, an amplifying and filtering circuit, an analog-to-digital conversion circuit and an MCU processor, the driving circuit is connected with the input end of the measuring probes through the analog switch circuit, the output end of the measuring probes is connected with the signal input end of the C/V conversion circuit through the analog switch circuit, the signal output end of the C/V conversion circuit is connected with the subtraction circuit through the rectifying and filtering circuit, and the signal output end of the subtraction circuit is connected with the signal input end of the amplifying and, the signal output end of the amplifying and filtering circuit is connected with the MCU processor through an analog-to-digital conversion circuit, the signal input end of the analog switch circuit is connected with the MCU processor, and the MCU processor is connected with the main control system of the tamping coke oven through a wireless module.

2. The apparatus of claim 1, wherein the coal charge monitoring device comprises: the driving circuit comprises an active oscillator and a low-pass filter circuit, wherein the active oscillator is used for providing 1MHz alternating current signals, and sinusoidal voltages of 1MHz and 1V are obtained after filtering processing of the low-pass filter circuit.

3. The apparatus of claim 1, wherein the coal charge monitoring device comprises: the measuring probe is a laser sensor or an infrared sensor.

4. The apparatus of claim 1, wherein the coal charge monitoring device comprises: and the main control system of the tamping coke oven is also connected with an alarm.

5. The apparatus of claim 1, wherein the coal charge monitoring device comprises: the analog switch circuit adopts ADG1212, and the power supply of the analog switch circuit is +/-15V and two channels.