The IC card steam prepaid remote metering and monitoring system is an intelligent automated network-based management system that combines software systems and hardware collection and control with each other. It is a steam collection and control equipment installed in the steam official channel, and through the site of the steam prepaid metering control box to achieve the user of the steam flow measurement, billing, control, remote transmission.
As a key industry encouraged by the government of China to save energy and control air pollution, with the rapid development of cogeneration and centralized heating around the world, as well as the rising price of coal, a series of measurement and charging problems gradually emerged, and IC card steam prepaid remote measurement and monitoring system was then applied to the market.
The emergence of IC card steam prepaid remote measurement and monitoring system mainly solves the following problems.
1. The problem of large steam metering losses
As a heating industry, from the power plant pipeline outlet to start measuring to each of the total combined total of each sub-account measurement is always very different, and some heating companies the difference is even more than 10%, very abnormal. As a normal transmission loss if in the premise of high flow (flow rate of 15 m / s or more) pipeline loss * should not exceed 1.5%, if more than 1.5% of the measurement error, it indicates the existence of abnormal losses. Pipeline losses appear large errors mainly appear in the following areas.
Steam flow meter characteristics of the reasons, resulting in under-counting, leakage
Steam measurement in the heating industry at present, because of its high temperature reasons there are not many flow meters to choose from, mainly using vortex street, orifice plate, V vertebrae, bend these four flow meters to measure. These four flow meters in addition to the vortex flow meter, V cone flow meter can reach 1: 10-1: 15 range, orifice plate, bend pipe flow meter range ratio of 1: 3. Within the measurement range of the flow meter, the instrument can ensure the accuracy of the measurement, but when the use of flow is lower than the lower limit of measurement of the flow meter, the instrument will miss the meter or even do not count; when the flow in the pipeline beyond When the measurement range of the meter, the fluid will appear jet, flow meter is unable to measure, the meter measurement data is much smaller than the actual flow. When the user's usage fluctuates greatly, then the overall measurement error will increase, which is manifested by under-counting and under-accounting, naturally the loss of the heating company, this phenomenon is obvious in the production enterprises *.
Malicious steam theft caused by
With the increasing cost of steam, there are a small number of users trying to steal steam by any means possible, and the means are varied, the main means of stealing steam are the following.
(1), the use of large-headed needle piercing instrument signal line, resulting in temperature, pressure or flow signal line short circuit, in order to achieve the purpose of steam theft. When the temperature signal short-circuit, the temperature display room temperature, steam density drops, the instantaneous flow several times the drop. Pressure, flow signal short-circuit when the direct display of the measured value of zero, resulting in the flow does not count or density drop.
(2), the use of flowmeter measurement range characteristics, false gas consumption, resulting in the wrong selection of flowmeter for heating companies, so that the instrument works for a long time in the low lower flow limit or high upper flow limit. Use the meter error to steal steam.
(3), bribery of the heating company's meter reading or maintenance personnel, modify the parameters of the meter resulting in undercounting, in order to achieve the purpose of stealing steam.
(4), maliciously disconnect the power to the meter, so that the meter does not work in the process of use, thereby stealing steam. The price of steam is high and the amount of steam used is large, so once the phenomenon of malicious steam theft occurs, the amount of loss is huge.
2. Malicious arrears and capital turnover problems
Steam unit price is high, the average user is hundreds of thousands or even millions of dollars per month, once encountered bad customer malicious arrears, the heating company will be in a passive situation. On the one hand, coal is shipped when you see the money, on the other hand, steam charges cannot be collected, and once the burden is formed, there will be a capital turnover problem. Prepayment system can collect the money in advance, and using this side of the money can organize the coal inventory, etc.
System composition
1.1、The system mainly consists of the following parts.
Monitoring center: computer, IC card recharger, steam pre-sale management system software, remote heat network metering management system software
Communication network: Mobile GPRS or telecom CDMA-based communication network platform
GPRS/CDMA IC card prepaid control box: collects signals from on-site instruments: flow meters, pressure transmitters, RTDs, valves, etc., and transmits them to the monitoring center via GPRS/CDMA network, providing on-site utility under-voltage alarm and door magnetic anti-intrusion alarm
Measuring instruments: flow accumulator, flow meter, pressure transmitter, RTD, etc.
Steam valve: steam electric valve (with open valve angle function)
Hardware features
1.1, IC card steam prepaid remote metering monitoring system basic functions and features.
◎ Accurate collection of the collection of on-site instrumentation signals: flow meters, pressure transmitters, RTDs, valves, etc.
◎ IC card to purchase the amount of steam, pay first before consumption.
◎ Control of electric pilot valves according to the amount of steam purchased by the user, limiting the amount of steam owed by the user.
◎ Real-time data transmission to the monitoring center via wireless network.
Â- On-site 220V or 380V utility power failure plus backup battery automatic power supply mode, and provide power failure alarm reminder.
◎ With non-operators to open the metering control cabinet, anti-intrusion alarm reminder.
◎ Display function: LCD display when working, the accumulated amount, the remaining amount of information, and provide the remaining amount of SMS query reminders.
◎ Purchase mode: IC card top-up purchase and remote bank top-up payment dual function.
Software functions
◆ IC card steam sales volume function.
◆ The remaining quantity of the steam-using unit is queried and displayed, and the remaining quantity is not enough to remind the SMS and alarm function.
◆ Real-time monitoring and display of steam source and user data electronic map (flow rate, pilot valve status and other information).
◆ Control of supply or stop according to the user's payment of steam charges, and provide the function of setting the amount of unpaid credit.
◆ Active call measurement function.
that is, the data of monitoring points can be actively extracted at any time on the server of the dispatch center.
◆ Reporting function.
It automatically generates daily, monthly and annual reports, and also can make statistical reports and print them at any time. Automatic printing function can be set.
◆ Data storage and backup function.
The system database can be stored locally, and its storage time is decided according to the demand and computer configuration.
◆ Automatic fault alarm function.
Monitoring points automatically report fault information to the monitoring center and automatically print alarm information. Automatic detection of faults are: flowmeter communication failure, 220v AC power failure, IC card failure, etc..
◆ System expansion and upgrade function.
system has an open data interface to facilitate the increase and expansion of monitoring points at a later stage.
Note: Since the specific functions of the IC card steam prepaid remote metering monitoring system are customized according to the specific requirements of the user, so the specific design requirements need to be confirmed with our technical department before ordering.
