Automatic metering system for coal tower scales of coke ovens

Abstract

The invention discloses an automatic metering system for coal tower scales of coke ovens. The system comprises a weighing meter, a magnetic proximity switch, a DI / DO (digital input / digital output) card and an indicator light circuit controlled by the DI / DO card; the weighing meter is connected with the serial port of a computer; a contact of the magnetic proximity switch is fixed on the bottom plate of a coal tower over a coal tower scale of a coke oven, and a magnet of the magnetic proximity switch is fixed on the top of a coal-charging car and electrically connected with a weighing control circuit with a weighing button; and when the magnetic proximity switch is switched on, the output end of the DI / DO card can light up an indicator light by means of a relay and the contact controlled by the relay. The metering system has the advantages that: the metering system breaks through the conventional manual static scale operation mode, and realizes the unattended automatic metering of the non-automatic scale, and because nodes are connected with one another through cables, signal transmission is highly safe and reliable.

Description

technical field [0001] The invention relates to the technical field of coal measurement in coke enterprises, in particular to a coke oven coal tower scale self-service measurement system. Background technique [0002] The coke oven coal tower scale is a measurement facility configured by coke production enterprises to measure the amount of coal added, and is generally a static rail scale. After the coal loading truck is loaded with coal, the gross weight is measured, and the coal is added to the coke oven and returned to the scale to measure the tare weight. Since the coal tower scale is a static scale, special personnel are required to be responsible for measurement and statistics, and the labor cost is relatively high. Although some enterprises apply wireless technology to realize unattended measurement, due to the poor environment of the coke oven (a lot of dust and noise), the general reliability is not high. Contents of the invention [0003] The purpose of the pres...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of high labor cost and inaccurate measurement of coke oven coal addition in the prior art, and provide a coke oven coal tower scale self-service measurement system, which uses a magnetic proximity switch plus a weighing button. The combination jointly sends out the signal of measurement start, and the adopted technical solution is: a coke oven coal tower scale measurement system, including a weighing instrument, and the weighing instrument is connected to a computer through a serial port, characterized in that: the coke oven coal tower The scale metering system also includes a magnetic proximity switch, the contacts of which are fixed on the coal tower bottom plate at the top of the coke oven coal tower scale, and the magnets of the magnetic proximity switch are fixed on the top of the coal loading car and are electrically connected to the In the weighing control circuit of the weighing button; the coke oven coal tower scale metering system also includes a DI / DO card and an indicator circuit controlled by it. When the magnetic proximity switch is in a conducting state, the output terminal of the DI / DO card The indicator light is illuminated by the relay and the contact controlled by the relay

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