CN202379939U - New material level device for coke oven coal car - Google Patents

Abstract

The utility model discloses a novel material level device of a coke oven coal car, which comprises a coal hopper and a detection circuit, wherein an electrode is in an inverted L shape, the lower part of the electrode is naturally and vertically suspended in the coal hopper, and the upper part of the electrode is fixedly connected with a bracket arranged at the top of the coal hopper through an insulating material; the detection circuit comprises a voltage stabilizing rectifier, a coal bucket, an electrode, a paperless recorder and a compensation resistor which are connected in sequence. The novel material level device of the coke oven coal car has the function of continuously displaying the material level of the coal hopper, carries out real-time detection and control on the coal charging amount, provides information of the coal charging amount at any time and realizes process monitoring; compared with a radar level gauge, the device has the advantages of high price advantage, adaptability to various working conditions and strong practicability; the device has the advantages of simple electrical configuration, strong maintainability, small maintenance amount and reliable operation.

Description

New material level device for coke oven coal car

technical field

The utility model belongs to the technical field of coal hopper material level measurement, in particular to a novel material level device for a coke oven coal car.

Background technique

In iron and steel complexes, the coal loading cars equipped with metallurgical coke top-loading coke ovens need to be equipped with coal hopper material level detection devices, which are used for material level display and control during the coke oven coal charging process. At present, there are two types of material level detection devices used in China: capacitive contact type level gauge and radar level gauge. Because the capacitive contact type material level display meter has many failures, and the material level display only has three points of high, medium and low, it cannot achieve continuous display of material level, and there are problems such as inaccurate coal charging guidance for coke ovens; radar material level The one-time investment and daily maintenance costs are relatively high, and the requirements for actual working conditions are relatively high, which makes it difficult to promote practical applications. At present, there is no low-cost, highly practical detection device that can continuously and stably display the material level in China.

Utility model content

The purpose of the utility model is to provide a new material level device for a coke oven coal car which can realize continuous and stable display of the material level, is cheap and has strong practicability.

In order to achieve the above object, the technical scheme that the utility model takes is:

A new material level device for a coke oven coal car, including a coal hopper and a detection circuit. The electrode is in an inverted L shape, the lower part is naturally vertically suspended in the coal hopper, and the upper part is fixed with a bracket arranged on the top of the coal hopper through an insulating material. connection; the detection circuit includes a voltage stabilizing rectifier, a coal hopper, an electrode, a paperless recorder and a compensation resistor connected in sequence.

The electrodes are stainless steel round rods.

The insulating material is a porcelain bottle.

Pin 1 of the paperless recorder is connected to the electrode, pin 2 of the paperless recorder is connected to one end of the compensation resistor, and the other end of the compensation resistor is connected to the negative pole of the voltage stabilizing rectifier, The positive pole of the stabilized rectifier is connected to the power ground GND; the 20 pin of the paperless recorder is connected to the upper limit alarm, and the 22 pin of the paperless recorder is connected to the lower limit alarm.

There are 2 to 4 coal hoppers in the detection circuit.

The stabilized rectifier is connected in parallel with a capacitor and a common resistor.

The new material level device of the coke oven coal car provided by the utility model has the function of continuously displaying the material level of the coal hopper, real-time inspection and control of the coal loading amount, and provides information on the coal loading amount at any time to realize process monitoring; the device and the radar material level Compared with other devices, it has a high price advantage, can adapt to various working conditions, and has strong practicability; the device has simple electrical configuration, strong maintainability, small maintenance amount, and reliable operation.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a block diagram of the detection circuit of the present invention.

Fig. 3 is a schematic diagram of a circuit structure of a coal hopper of the utility model.

Fig. 4 is a schematic diagram of the circuit structure of three coal hoppers of the utility model.

Fig. 5 is a structural schematic diagram of the voltage stabilizing filter circuit of the present invention.

In the figure: 1-coal hopper, 2-electrode, 3-insulating material, 4-support, 5-stabilizing rectifier, 6-paperless recorder, 7-compensating resistance, 8-capacitance, 9-common resistance, 10- 1# coal hopper, 11-2# coal hopper, 12-3# coal hopper.

Detailed ways

Below in conjunction with specific embodiment and accompanying drawing thereof, the utility model is further described.

As shown in Figure 1, a new material level device for a coke oven coal car includes a coal hopper 1 and a detection circuit. The electrode 2 is a stainless steel round rod, in an inverted L shape. The lower part is naturally vertically suspended in the coal scuttle 1, and the upper part is fixedly connected with the bracket 4 erected on the top of the coal scuttle 1 through the insulating material porcelain bottle 3 with bolts.

As shown in FIG. 2 , the detection circuit includes a voltage stabilizing rectifier 5 , a coal hopper 1 , an electrode 2 , a paperless recorder 6 and a compensation resistor 7 connected in sequence. The model of the stabilized rectifier 5 is S-150-5, which rectifies the AC 220V power supply into a DC 24 V power supply. Paperless recorder 6 is a JLY C28L series paperless recorder, with a standard configuration of 4-20mA current input, and an upper and lower limit switch alarm output for 220VAC control and alarm. The upper limit refers to the high material level of the material, and the lower limit refers to the material Low material level.

As shown in Figure 3, pin 1 of the paperless recorder 6 is connected to the electrode 2, pin 2 of the paperless recorder 6 is connected to one end of the compensation resistor 7, and the other end of the compensation resistor 7 is connected to the negative pole of the voltage stabilizing rectifier 5, The positive pole of the stabilized rectifier 5 is connected to the power ground GND; the 20 pins of the paperless recorder 6 are connected to the upper limit alarm, the 22 pins of the paperless recorder 6 are connected to the lower limit alarm, and the 27 pins of the paperless recorder 6 are used for spare. One AC220V power supply provides working power for the stabilized rectifier 5, and the other AC220V power supply provides working power for the paperless recorder 6.

As shown in Figure 4 and Figure 5, three coal hoppers are monitored in real time at the same time. 1# coal hopper 10 and 1# compensation resistor R1, 2# coal hopper 11 and 2# compensation resistor R2, 3# coal hopper 12 and 3# compensation resistor R3 are connected in parallel, and the three coal hoppers can be connected with one paperless record It can also be connected with a multi-input paperless recorder at the same time. One coal hopper corresponds to one signal input and alarm output of the paperless recorder, and multiple coal hoppers correspond to multiple signal inputs and one-to-one corresponding alarm output of the paperless recorder. The three coal hoppers share a stabilized rectifier, the signal circuits are connected in parallel, and the alarm outputs are independent of each other.

When the three coal hoppers are collecting signals at the same time, the signals interfere with each other due to the common ground of the signal loops, and the common resistance also has a certain influence on the signal voltage, so a voltage stabilization filter circuit is required to stabilize the power supply voltage and reduce load effect. Connect a 2200μF capacitor in parallel to the public resistor 9 with a resistance value of 2KΩ (there is no common resistance when collecting a coal hopper), so as to reduce the interference of the strong current line electromagnetic and the power supply signal on the input signal of the paperless recorder.

The new material level device of the coke oven coal car mainly uses the electrical conductivity of coal and the contact resistance between the coal and the electrode changes with the change of the coal content in the coal hopper. The amount of coal changes approximately linearly, and the paperless recorder collects current signals, displays and processes the current signals. As the height of the material in the coal hopper 1 changes, the contact resistance between the stainless steel electrode 2 and the material changes approximately linearly with the amount of coal loaded, and the change in the contact resistance leads to a change in the current of the closed loop, thereby realizing a paperless recorder in the closed loop input signal changes. The paperless recorder 6 converts the analog input signal into a digital display or a column, and simulates the amount of coal in the coal scuttle through the setting of the internal range, and displays the amount of coal loaded in the coal scuttle through the column of the paperless recorder. Displayed with intuitive level detection. The paperless recorder is installed in the cab of the coal truck to display the actual material conditions of each coal hopper, and is used for the driver to control the amount of coal. A practical and reliable material level detection device is realized, which provides an effective reference for production.

Claims (6)

1. novel material level device of coke oven coal car; Comprise coal bunker (1) and testing circuit; It is characterized in that; Electrode (2) is L shaped, and the bottom vertically is suspended in the said coal bunker (1) naturally, and top is fixedly connected with the support (4) that is arranged on said coal bunker (1) top through insulating material (3); Said testing circuit comprises stabilized rectifier (5), coal bunker (1), electrode (2), recording instrument without paper (6) and the compensating resistance (7) that connects successively.

2. according to the novel material level device of the said coke oven coal car of claim 1, it is characterized in that said electrode (2) is a stainless steel round bar.

3. according to the novel material level device of the said coke oven coal car of claim 1, it is characterized in that said insulating material (3) is a porcelain vase.

4. according to the novel material level device of the said coke oven coal car of claim 1; It is characterized in that; 1 pin of said recording instrument without paper (6) is connected with said electrode (2); 2 pin of said recording instrument without paper (6) are connected with an end of said compensating resistance (7), and the other end of said compensating resistance (7) is connected with the negative pole of said stabilized rectifier (5), and the positive pole of said stabilized rectifier (5) meets power supply ground GND; 20 pin of said recording instrument without paper (6) connect the limit warning howler, and 22 pin of said recording instrument without paper (6) connect the lower limit warning howler.

5. according to the novel material level device of the said coke oven coal car of claim 1, it is characterized in that 2～4 coal bunkers are arranged in the said testing circuit.

6. according to the novel material level device of the said coke oven coal car of claim 5, it is characterized in that said stabilized rectifier (5) is parallel with electric capacity (8) and common resistance (9).

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