Steam metering prepaid device
The significance of installing a "steam metering prepaid device"
With the rapid development of China's economy and the improvement of environmental protection standards, the heat industry as an infrastructure is also growing and scaling up. At present, heating enterprises generally have the management thinking of "heavy equipment, light metering", the metering facilities used are outdated, the small flow meter cannot come out, the large flow will not move, and the metering instrument installed on site has no reliable anti-theft means...... The existence of this phenomenon invisibly increases the pipe damage of heating enterprises, and can easily lead to measurement disputes and difficulty in charging. Once the heating enterprise has arrears, it is likely to use all kinds of social relations to prevaricate and delay, but it is difficult for heating enterprises to stop the arrears, and the arrears often owe more and more, which is difficult to completely cure. Coupled with the dishonesty of individual heating enterprises and the shutdown and transfer caused by operation, heating enterprises are miserable. Therefore, in order to protect the normal operation and legitimate rights and interests of heating enterprises and put an end to such injustices, we have developed a "steam metering prepaid device" using mature scientific and technological means, the concept of which is "pay first, then use steam".
Management process after installing the "steam metering prepaid device"
After the installation of the "steam metering prepaid device" on the site of the user, the user first pays the steam fee to the heating unit in advance, and the steam fee is confirmed by the financial department of the heating enterprise, and the relevant personnel are notified to use the recharge software to recharge the user's IC card, and the heat network management personnel take this IC card to the site to "swipe the card", after the device receives the information of the IC card, it will calculate the user's available steam according to the set unit price, and automatically start the valve to supply steam. The remaining available amount and amount are dynamically displayed as well as all measurement parameters.
When the user's remaining amount is insufficient, the on-site instrument will emit a beep alarm to remind the customer to pay as soon as possible (and the heat network remote monitoring system can realize mobile phone SMS notification), otherwise when the balance in the meter is equal to zero, the system will automatically close the valve and stop the heating supply.
At the same time, in order to avoid the metering instrument installed on the site from being artificially changed, our company will provide a special anti-theft box to cover the relevant instrument uniformly, and use wireless remote control to lock it, which can only be opened normally after unlocking with the remote control, otherwise it will be regarded as a stolen car, and the system will automatically close the valve and stop the steam.
Flow chart:
Physical picture of the "Steam Metering Prepaid Device"
The real scene of a user installed in Changxing Southeast Thermal Co., Ltd. (1)
The piping section in a steam metering prepaid unit
Introduction to the main functions of steam metering prepaid devices
一、 防盗控制：
In order to prevent bad users from stealing gas, the primary instrument anti-theft box and the secondary instrument control box are designed to be anti-theft; After the instrument installation and commissioning is completed, use the remote control to lock the instrument box and anti-theft box, and the anti-theft indicator light (red) is on, at this time the instrument is in the anti-theft operation state; If you want to steal gas, you have to open the anti-theft box or the secondary instrument control box, and do the manipulation on any instrument, but as long as you open any anti-theft box, the system will automatically close the valve, at this time the user can not open it, only the gas supply management personnel can use the remote control to decode before opening the valve to supply gas normally.
二、 管道预热：
Considering that the valve will automatically close during festivals, arrears or gas theft, and when it is opened again, if it is opened directly, it will cause pipeline jumping, equipment damage, and casualties in serious cases, so we consider the pipeline preheating and design the valve to slow open (time can be set) to ensure the safety of personnel, equipment and pipelines.
三、 高温高压特种阀门：
We use high temperature and high pressure special customized valves, the temperature is 425 degrees, the pressure is 1.6, 2.5, 4.0mpa optional, the seal is used of carbide party grinding surface seal, the surface hardness is more than HRC-65 degrees, can be opened and closed 10,000 times, the general valve selection seals on the market are generally tetrafluorine, PTFE, PPL, etc., these materials are not resistant to high temperature, more than 150 degrees thermoplasticity is very poor, if on the 280 degree steam can not be opened several times even the seal can not be found, Not to mention sealing; I have personal experience that it can only be used on cold, hot water or chemical raw materials, and its advantage is that it is better to prevent corrosion.
四、 UPS双路独立供电：
In order to prevent AC power outage from causing the instrument to be unable to measure and the valve to be closed, a dual-channel UPS independent power supply is designed, one of which is supplied to the settlement instrument, one is supplied to the valve switch, and the single battery capacity is 32Ah, to ensure that the instrument is measured normally after the AC power outage, and the valve is normally opened and closed.
五、 多重防雷保护：
The system motherboard and metering box are designed with lightning protection circuits, when encountering lightning, the lightning protection circuit responds quickly, makes protection, and then the circuit automatically recovers, and the instrument should be installed in an open place to hit the lightning protection grounding rod to ensure normal measurement; Considering that some users are used in chemical plants or environments with corrosive gases, we also do three-proof treatment on the circuit board: anti-corrosion, moisture-proof, and anti-oxidation.
Financial analysis of "Steam metering prepaid units"
The price of the device
| Pipe Diameter (mm) | Price (RMB) |
| DN50 | 55000.00 |
| DN80 | 65000.00 |
| DN100 | 70000.00 |
| DN125 | 75000.00 |
| DN150 | 80000.00 |
One. The above prices include:
1 set of anti-vibration vortex street (range ratio 60:1): produced by Hubei Nankong Instrument Technology Co., Ltd., which won the product innovation award of the National Instrumentation Society
1 set of pressure transmitter: produced by Hubei Nankong Instrument Technology Co., Ltd
1 Pt100: produced by Hubei Nankong Instrument Technology Co., Ltd
1 set of hard-sealed floating electric ball valve with temperature resistance of 400°C, 1 stainless steel anti-theft box, 1 stainless steel control box, 1 XRC-2600 energy management instrument, 1 set of control circuit motherboard, 1 set of UPS special power supply, 1 set of inverter power supply system, 1 set of lightning protection system, 1 remote control, 1 IC card, recharge software and installation accessories.
Two. Free of charge for installation and commissioning within 300 kilometers, and a two-year warranty
Three. Free installation of flanges and shielded cables
Four. IC card recharge machine is provided free of charge: 1 set of one item
Five. Includes 17% VAT invoice
Six. Excluding the verification fee of the local technical supervision department
(2) Economic analysis of the installation of "steam metering prepaid device"
At present, the metering facilities used by heating enterprises in Zhejiang are a set of orifice flow meters or vortex flow meters, plus a metering box, a flow totalizer in the box, at most equipped with backup power supply and GPRS modules, such a configuration price is generally between 40,000 ~ 60,000 according to the different pipe diameters, compared with this, although the "heat network metering prepaid device" has increased by 1~20,000 yuan at one time in terms of cost, but at least six aspects have achieved innovation and improvement:
The first is the "anti-vibration vortex flow meter" with a wide measuring range and excellent anti-vibration effect, which can measure steam with a range ratio of more than 20:1, such as DN50 can be measured in 0. Between 3t~3.5t, this is very effective for those users who use steam or deliberately use steam at both ends, especially the traditional vortex flowmeter is difficult to resist vibration interference, but the flowmeter can definitely make the user open the valve and stop, but when the hammer is knocked, it does not count, avoiding the measurement disputes caused by such problems.
secondly, the "steam metering prepaid device" is equipped with an automatic valve control system, which is customized to ensure that there is no leakage within 400°C;
The "steam metering prepaid device" is equipped with a complete electronic anti-theft system;
The "steam metering prepaid device" is equipped with a lightning protection system, which can ensure that it is not damaged by lightning strikes;
The "steam metering prepaid device" is equipped with a large-capacity UPS system, which can ensure that the power outage is not affected for 7 days within 2 years;
"Steam metering prepaid device" is equipped with IC card recharge system;
In particular, the "steam metering prepaid device" can completely solve the trouble of arrears in heating enterprises, greatly improve the work efficiency and management efficiency of personnel, and the benefits in this regard are immeasurable!
FAQs on "Steam Metering Prepaid Units"
Q: Can the "steam prepaid device" be integrated into the existing monitoring network?
Answer: This device is equipped with GPRS communication module, support standard MODBUS communication protocol, if the protocol used by the original monitoring system is standard, it can directly enter the network, if the original system adopts a non-standard protocol, our company can specially develop to ensure network access.
Q: Can the "steam prepaid device" do without the flow meter?
A: Yes, users can keep the original flow meter, and the fee will be deducted accordingly.
ƒ Q: Is the IC card in the "steam prepaid device" safe, what should I do if I lose it?
A: IC card technology is already a mature technology and has been widely used in all walks of life. Each set of devices is corresponded to a single card, and can be reissued if lost.
(4) Q: What should I do if the "steam prepaid device" expires after the warranty period expires?
Answer: Our company is responsible for the lifelong maintenance of the device, and the maintenance fee after the warranty period is collected as material cost + travel cost + management fee.
(5) Q: Who will solve the installation and commissioning of the "steam prepaid device"?
A: Our company implements turnkey projects, transportation, installation, commissioning are all solved by our company.
Explanation of the self-control anti-theft part:
After a lot of market research, such as development zones, chemical parks, thermal power plants, thermal companies, waterworks, etc.; Most heating companies react to large pipe damage, and at the same time, go to the user's metering instrument site to observe, and find a variety of gas theft phenomena, such as: malicious power outage, data modification, malicious selection, instrumentation and so on; We believe that the above behaviors are directly related to the increase in management loss; In order to solve the above problems, the upgraded control system is more stable and the control is more intelligent.
Key features:
一、 防盗控制：
In order to prevent bad users from stealing gas, the primary instrument anti-theft box and the secondary instrument control box are designed to be anti-theft; After the instrument installation and commissioning is completed, use the remote control to lock the instrument box and anti-theft box, and the anti-theft indicator light (red) is on, at this time the instrument is in the anti-theft operation state; If you want to steal gas, you have to open the anti-theft box or the secondary instrument control box, and do the manipulation on any instrument, but as long as you open any anti-theft box, the system will automatically close the valve, at this time the user can not open it, only the gas supply management personnel can use the remote control to decode before opening the valve to supply gas normally.
二、 管道预热：
Considering that the valve will automatically close during festivals, arrears or gas theft, and when it is opened again, if it is opened directly, it will cause pipeline jumping, equipment damage, and casualties in serious cases, so we consider the pipeline preheating and design the valve to slow open (time can be set) to ensure the safety of personnel, equipment and pipelines.
三、 高温高压特种阀门：
We use high temperature and high pressure special customized valves, the temperature is 425 degrees, the pressure is 1.6, 2.5, 4.0mpa optional, the seal is used of carbide party grinding surface seal, the surface hardness is more than HRC-65 degrees, can be opened and closed 10,000 times, the general valve selection seals on the market are generally tetrafluorine, PTFE, PPL, etc., these materials are not resistant to high temperature, more than 150 degrees thermoplasticity is very poor, if on the 280 degree steam can not be opened several times even the seal can not be found, Not to mention sealing; I have personal experience that it can only be used on cold, hot water or chemical raw materials, and its advantage is that it is better to prevent corrosion.
四、 UPS双路独立供电：
In order to prevent AC power outage from causing the instrument to be unable to measure and the valve to be closed, a dual-channel UPS independent power supply is designed, one of which is supplied to the settlement instrument, one is supplied to the valve switch, and the single battery capacity is 32Ah, to ensure that the instrument is measured normally after the AC power outage, and the valve is normally opened and closed.
五、 多重防雷保护：
The system motherboard and metering box are designed with lightning protection circuits, when encountering lightning, the lightning protection circuit responds quickly, makes protection, and then the circuit automatically recovers, and the instrument should be installed in an open place to hit the lightning protection grounding rod to ensure normal measurement; Considering that some users are used in chemical plants or environments with corrosive gases, we also do three-proof treatment on the circuit board: anti-corrosion, moisture-proof, and anti-oxidation.
Energy Metering Manager Function Explanation:
In recent years, with the promotion and popularization of urban central heating, thermal power plants and thermal companies as heating enterprises, in addition to doing a good job in normal heating supply to factories and mining enterprises, public institutions, and residential communities as heat users, have also encountered some phenomena that are contrary to fair and just heat use in measurement, such as unjustified arrears of heating costs, malicious modification of data by criminals, password theft, system power outages, etc., and technically encountered how to effectively measure small flows, how to avoid over-planned steam consumption, How to measure the on-site sensor if it is broken or burned out, how to judge superheated steam and saturated steam, etc.
It is based on a series of considerations that solve the above problems but is not limited to it, combined with the application experience of the majority of heating enterprises for many years and our company's more than ten years of experience in the development and production of flow totalizers, we have specially launched a new instrument for energy metering and charging - energy metering manager, which can not only be used for trade settlement in the heating industry, but also suitable for trade measurement of natural gas and gas.
1．1 “贸易”功能的介绍
The energy metering manager is used for energy trade metering and settlement, in addition to the metering function, it also has a large number of functions for trade settlement. First of all, it is equipped with an IC card receiver, and the user fills the trade amount into the meter through the IC card, in addition, in order to fairly and justly maintain the interests of both energy suppliers and consumers, and learn from the measurement and settlement experience of the water supply and power supply industry, the "trade" function is specially developed, which is divided into "agreement measurement", "time-of-use measurement" and "quantitative control" three pieces, in practice the energy supply and consumption can be used according to needs and negotiation and agreement, this function is an important management means of SB-2600 energy metering manager.
1．2 进入“贸易”设定的方法
After the meter enters the "Settings Menu", use "
”、“" key to select "Mode", press ""Key to enter the mode setting (see Figure 7-1), and then use "”、“" key, select "Trade", pressThe key is to enter the setting of trade settlement, see Figure (7-2).
图7－1 图7－2
1．3 协议计量
1.3.1 Lower limit of the agreement
Any flow meter has a minimum flow rate to ensure accuracy, and if the flow rate is further reduced, there will be a loss of sensitivity (such as a vortex flow meter) or it will be cut off as a small signal, which is unfavorable to the supplier and unfair. To this end, both supply and demand parties can agree that a certain flow rate is the "lower limit of flow", and when the actual flow rate is less than the agreed value, it will be measured according to the agreed value (Note: when the flow is stopped or when the flow signal is less than the set small signal cut-off value, this meter will still be measured as zero).
The method of setting the "lower limit of the agreement" is shown in Annex 2
1.3.2 Agreement limit
The flow meter runs beyond the range, which generally leads to low metering values, and if the energy consumption in the heat network exceeds the plan, it will also affect the heating quality of the heat network. This not only harms the interests of the supplier, but also harms the interests of other users. In order to encourage users to plan energy consumption and operate within the set range, the supply and demand parties can agree on a certain flow as the "upper limit of traffic" and agree on the "agreement coefficient". For example, if the agreed "flow limit" is 100 tons/hour and the "protocol coefficient" is 2, when the actual flow rate is 150 tons/hour, this meter will show 200 tons/hour [100+(150-100)×2]
The method of setting the "lower limit of the agreement" is shown in Annex 2.
1.3.3 How to set up "protocol metering"
After the meter enters the Trade Settings, use "”、“key, select the "Protocol Metering" item, and use "▼" key or "▲" to select "On" or "Off", "Off" means that "Protocol Metering" is not enabled, if you select "On", you need to press" button to enter the specific settings, see Appendix 2 for details.
After completing the setting of "Agreement Metering", press "button to return to the "Trade Settings" screen, and you can set "Time-of-use Measurement" and "Quantitative Control".
Press "" key to return to the previous menu.
1.3.4 Display mode of protocol metering
超“协议上限” 显示： 超“协议下限”显示：
Figure 7-3 Figure 7-4
1.4 Time-by-minute measurement
1.4.1 The significance of time-sharing measurement
In order to encourage users to use energy at night and promote the balance of load day and night, this meter has the function of time-sharing measurement, which can set a certain time period of the day as "peak", and the billing in this period is carried out according to the set "peak unit price" standard, and at the same time set another time period of the day as "valley", the billing in this period is carried out according to the set "valley unit price" standard, and the rest of the time period is "flat", and the billing is carried out according to the set "flat unit price" standard.
1.4.2 Setting method of time-by-minute measurement
After the meter enters the "Trade Settings" (see Figure 7-2), use "”、“" key to select the "Time-of-use Metering" item, and use "▼" key or "▲" to select "On" or "Off" to enter, "Off" means that "Protocol Metering" is not enabled, if you choose "On", you need to press" key to enter the specific settings, see Appendix 2.
The "peak" period and the "valley" period can be set arbitrarily, and the user can press”、“"key" to move the cursor, press "▼"" key or "▲" to select the start and end time of peaks and valleys, the time is according to the 24-hour system, up to 2 peaks and 2 valleys can be set per day, and "00→00" means no setting. The time period outside of "peak" and "valley" is "flat".
After completing the setting of "Time-of-use Metering", press "" button to return to the "Trade Settings" screen, and you can set "Quantitative Control".
Press "" key to return to the previous menu.
1.4.3 Display mode of time-minute measurement
Figure 7-5
Peak accumulation: Cumulative flow during peak hours
Valley accumulation: Cumulative flow during the valley period
Flat: Cumulative flow during normal hours
1.5 Quantitative control
1.5.1 Quantitative control process
Heating industry: The user pays the steam bill in advance in the power plant or heating company, the fee is charged into the user's IC card through the IC card management system, the IC card records the amount paid by the user, and then the user charges the card into the energy manager installed by himself, and the manager receives the information in the IC card, according to the set unit price of steam, automatically calculates the user's available steam volume, displays the available steam amount and the remaining amount in real time, and sends a relay signal to open the steam supply valve, and officially starts steam supply metering. When the user's remaining amount is insufficient, a beep alarm will be issued until the fuel bill is recharged, and if the remaining amount is zero, the energy metering manager will automatically close the steam supply valve.
The specific process is shown in Figure 7-6
图7－6 热电行业定量控制流程图
1．5．2 IC卡的使用方法
Each IC card is only valid for the energy management system of the unit, when using it, directly press the IC card containing the recharge amount to the key area of the manager (maximum RF distance: 10 cm), hear the "drip" sound, the meter displays the screen in Figure 7-7, indicating that the meter has received the information of the recharge amount, and accumulate the newly charged amount to the "balance", and the amount in the IC card is reset to zero, which must be saved for the next recharge.
When the IC card with zero amount is recharged to the manager, Figure 7-8 is displayed, and the "balance" on this screen is the original balance.
For IC cards that are not from the unit, the meter will automatically judge and display "illegal card", see Figure 7-9.
图7－7 图7－8 图7－9
1.5.3 Setting of quantitative control
After the meter enters the Trade Settings, use "”、“" key to select the "Quantitative Control" item, and use "▼"" key or "▲" to select "automatic", "normally open", "normally closed" or "off", the meaning of each function is shown in Table 7-1. If you select Automatic, you need to press "" key to enter the specific settings, see Appendix 2.
The setting of "quantitative control" plays a very key role in the energy metering manager, it determines the billing unit price of energy consumption, if the "time-of-use metering" is turned on, it determines the billing unit price of "peak", "valley" and "flat", and also plays a role in controlling the limitation of beeping alarm. After completing the setting of "Quantitative Control", press "" key to return to the previous menu.
Table 7-1
| Quantitatively controlled content | Meaning |
| Automatic | Before the "margin" purchased by the user is used up, the "state" of the relay output K1 is disconnected, and when the "balance" is zero, the "state" of the relay output automatically changes to "closed" |
| Always open | The relay output K1 "state" is always "normally open" regardless of whether the "margin" is zero or not |
| Normally closed | The relay output K1 "state" is always "normally closed" regardless of whether the "margin" is zero or not |
| Shut down | Turn off the Quantitative Control feature |
Note: (1) After each meter is officially put into operation, the "flow unit" and "unit price" set by it shall not be changed at will, otherwise, the original "margin" will change.
(2) When a power outage occurs, the "state" of the relay output will be "normally closed"”
(3) If the "quantitative" value is set too much, it can be entered again in the "quantitative setting" and the method of setting a negative number can be used to subtract the amount of the oversetting.
(4) Pressing "cumulative amount clearing" will also clear the "balance".
1.5.4 Display mode of quantitative control
Figures 7-10
