CN210065642U - Coal charging amount monitoring device for tamping coke oven - Google Patents

Abstract

The utility model relates to a monitoring device for the amount of coal charged in a tamping coke oven, which belongs to the technical field of tamping coke ovens, and specifically comprises a measuring bracket fixed above a coal supporting plate, and a plurality of measuring probes are fixed on the measuring bracket. The measuring probe is arranged along the length direction of the briquettes, and the measuring probe is connected with the signal detection and processing unit, and the signal detection and processing unit is connected with the main control system of the tamping coke oven. The utility model has a simple structure, is convenient to use, and can detect in real time. Briquette length, automatic alarm.

Description

A monitoring device for coal loading in a tamping coke oven

technical field

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

Background technique

At present, due to many human factors in the process of briquetting, the actual size of briquette often does not reach the standard size, and the coal loading is too small, resulting in substandard coke oven output. According to statistics, the annual output loss due to coal charging workers is about 3%. For a standard 5.5-meter tamping coke oven with an annual output of 1.2 million tons, the lost output value is about 60 million yuan.

Utility model content

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

In order to achieve the above purpose, the technical solution adopted by the present utility model is a monitoring device for the amount of coal charged in a tamping coke oven, which is characterized in that it comprises a measuring bracket fixed on the top of the coal supporting plate, and a plurality of measuring brackets are fixed on the measuring bracket. A measuring probe, the measuring probe is arranged along the length direction of the briquettes, the measuring probe is connected with the signal detection and processing unit, the signal detection and processing unit is connected with the main control system of the tamping coke oven, and the signal detection and processing unit includes Drive circuit, analog switch circuit, C/V conversion circuit, rectifier and filter circuit, subtraction circuit, amplification filter circuit, analog-to-digital conversion circuit and MCU processor, the drive 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 by the rectification and filter circuit and the subtraction circuit, the The signal output end is connected with the signal input end of the amplifying filter circuit, the signal output end of the amplifying filter circuit is connected to the MCU processor through the analog-to-digital conversion circuit, the signal input end of the analog switch circuit is connected to the MCU processor, and the MCU processor It is connected with the main control system of the tamping coke oven through a wireless module.

Preferably, the drive circuit includes an active oscillator and a low-pass filter circuit, the active oscillator is used to provide an AC signal of 1MHz, and after being filtered by the low-pass filter circuit, a sinusoidal voltage of 1MHz and 1V is obtained.

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

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

Preferably, the analog switch circuit adopts ADG1212, whose power supply is ±15V, and has two channels.

Compared with the prior art, the utility model has the following technical effects: the utility model has the advantages of simple structure and convenient use. A plurality of measuring probes are installed along the length of the coal plate, and the length of the coal cake is detected in real time through the measuring probe, and then the length of the coal cake is measured. The signal is transmitted to the MCU processor, and the MCU processor transmits the signal to the main control system of the tamping coke oven for alarm and interlock control. At the same time, the signal detection and processing unit subtracts the measurement signal of the measurement probe from the initial state signal to obtain the sensitive change value of the sensor, which has the effect of signal DC isolation, which is more conducive to the amplification of useful signals and other processing, and obtains higher detection sensitivity .

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

FIG. 2 is a block diagram of the control principle of the utility model.

3 is a circuit diagram of a C/V conversion circuit, a rectification filter circuit and a subtraction circuit in the utility model.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

As shown in Figures 1 to 3, a device for monitoring the amount of coal charged in a tamping coke oven includes a measuring bracket 1 fixed above the coal support plate, a plurality of measuring probes 2 are fixed on the measuring bracket 1, and the measuring probes 2 are along the coal. The cake is arranged in the length direction, the measuring probe 2 is connected with the signal detection and processing unit, the signal detection and processing unit is connected with the main control system of the tamping coke oven, and the signal detection and processing unit includes a drive circuit, an analog switch circuit, a C/V conversion circuit, a rectifier It is connected with the filter circuit, subtraction circuit, amplification filter circuit, analog-to-digital conversion circuit and MCU processor, and the drive circuit is connected with the input end of the measuring probe through the analog switch circuit, and the output end of the measuring probe is connected with the C/V conversion circuit through the analog switch circuit. The signal input end of the C/V conversion circuit is connected to the signal input end of the C/V conversion circuit, and the signal output end of the C/V conversion circuit is connected with the rectification and filtering circuit and the subtraction circuit. The analog-to-digital conversion circuit and the MCU processor, the signal input end of the analog switch circuit and 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 also connected with a Alarm system.

The measuring probe in the utility model is a laser sensor or an infrared sensor, the installation position is flexible, and combined with the site conditions, a plurality of probes can be arranged along the length direction of the briquettes, and the greater the number, the higher the precision. The C/V conversion circuit converts the AC excitation current received by the sensitive end of the sensor into an AC voltage signal. The rectifier and filter circuit mainly realizes the rectification of the AC voltage signal into a DC signal, and performs half-wave rectification through a diode to obtain a positive half-cycle AC signal. , and then the DC signal is obtained through the second-order positive feedback active filter; the DC signal is blocked by the subtraction circuit, and then amplified by the amplifying filter circuit, and then converted into a digital signal by the analog-to-digital conversion circuit and transmitted to the MCU processor. The MCU processor transmits the briquet length signal to the main control system of the tamping coke oven in real time. When the briquette length does not reach the standard and alarm, the main control system of the tamping coke oven adjusts the action of the tamping machine and the feeder in real time according to the length of the briquettes until the briquettes meet the requirements.

Among them, the drive circuit includes an active oscillator and a low-pass filter circuit. The active oscillator is used to provide an AC signal of 1MHz. After being filtered by the low-pass filter circuit, a sinusoidal voltage of 1MHz and 1V is obtained to improve the field energy of the sensitive space. . The analog switch circuit adopts ADG1212, its power supply is ±15V, two channels, and its on-capacitance is small, 1pF, which has little effect on the subsequent capacitive sensors, and can meet the time-division multiplexing work of different driving and sensitive electrodes by controlling the channel switching. .

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of the utility model.

Claims (5)

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.

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