traditional water meter
The internal structure of the traditional water meter can be divided into three parts: shell, sleeve and inner core from the outside to the inside. The shell is cast iron, and after the water comes out of the water inlet, it passes through the lower annular space of the shell, which is called the "lower annular chamber" here. Above this annular space, there is an "upper ring chamber" that communicates with the water outlet. There is a filter screen with small holes at the bottom of the sleeve to filter out the sundries in the water. There are upper and lower rows of round holes on the side of the sleeve. The positions of the holes are just opposite to the upper and lower ring chambers of the shell. Obviously, the lower row is the water inlet hole, and the upper row is the water outlet hole. It is particularly noteworthy that these two rows of holes are punched obliquely along the tangential direction of the circle. Note that the upper and lower rows of holes are in opposite directions. Water flows in from the lower drain hole along the tangential direction, which is bound to form a rotating water flow, which is very important for the work of the water meter. The inner core is divided into upper, middle and lower layers. The upper layer can be seen from the glass window, with only the pointer and dial. In fact, the most important thing is the lower layer, where there is a plastic wheel, and there are many plastic blades on the edge of the wheel, which are called "impellers".
The position of the impeller is just in the rotating flow formed by the lower hole of the casing, and the water flow impacts the blades around the wheel, generating torque and making the impeller rotate. The wider the faucet is turned on, the faster the water flow, and the faster the impeller turns.
The shaft of the impeller reaches the middle layer vertically, and there is a pinion on the shaft, which is used to mesh with the "decimal number gear" to achieve the purpose of accumulating the number of revolutions. The function of the "decimal number gear" is that every time the one-digit gear turns ten times, the ten-digit gear rotates once. In other words, for one revolution of the one-digit gear, one tenth of one revolution of the ten-digit gear. The single-digit gear is the active agent, and it is used to drive the ten-digit gear. In fact, each stage of the decade is done with two pairs of gears to make the direction of rotation consistent, one pair of gear ratio is 9:30, the other pair is 10:30, these two pairs are connected in series, the total gear ratio is this The product of the two, which is 0.099999, can be approximated by exactly 0.1. In this way, if you want to read seven digits (four before the decimal point is a black scale, and three after the decimal point is a red scale), you have to use 12 pairs of gears. Coupled with other uses, 18 shafts and 34 gears have to be squeezed into this small space in the middle layer, which can also be regarded as a high-density installation. Because of its simplicity and low price, this type of water meter can be used for a long time in a humid environment without maintenance, and it does not need a power supply, and the power failure does not affect the work. It will still serve for a long time.
Pronunciation
figure 1
figure 1
The mechanical water meter used by household residents generally has 8 pointers on the dial to indicate the value. As shown in Figure 1, the four red pointer indication dials on the right: ×0.1, ×0.01... are all indications less than 1 cubic meter, because the measurement unit of tap water is "cubic meter", these dials generally do not have Practical guiding significance, you do not need to recognize reading. The four black pointer indication dials on the left x1, x10... are the basis for water metering and charging, and readers should learn to read them. Recognize the pointer
When recognizing and reading, we must first clarify the units of the four black pointers and their carry relationship. In Figure 1, the four black pointer indication dials are counterclockwise from top to bottom, followed by the ones hand (×1), the tens hand (×10), the hundreds hand (×100), the thousand hand (×1000 ). The pointer of ×1 rotates once, the pointer of ×10 travels one word; the pointer of ×10 rotates once, the pointer of ×100 travels one word; the pointer of ×100 rotates one circle, and the pointer of ×1000 travels one word.
Recognition and reading essentials: When recognizing and reading the water meter, it is necessary to read from the high-position pointer to the lower-position in turn, that is, from the ×1000 pointer indicating value dial clockwise and from bottom to top. Special attention should be paid to: if the position of the thousands, hundreds, and ten pointers is between two numbers, pay attention to the association between the upper and lower adjacent pointers. The ten-digit pointer of "×10" is between 8 and 9, very close to 9. Whether to read 8 or 9 depends on whether the one-digit pointer of ×1 reaches 0. We see that the ones digit pointer is between 0 and 9, that is to say, there is no carry yet, so the tens digit pointer should read 8 instead of 9. If the one digit pointer also points between two numbers, it depends on whether the pointer of the red × 0.1 dial next to it is over "5", and the method of rounding by 4 to 5 is adopted to determine whether the one digit pointer is carried. ×0.1 The dial pointer has not passed "5", and the one digit pointer is between 0 and 9. At this time, no carry should be performed, and the one digit should be read as "9".
Smart IC card water meter
The smart IC card water meter is a new type of water meter that uses modern microelectronic technology, modern sensing technology and smart IC card technology to measure water consumption, transmit water data and settle transactions. Compared with traditional water meters, which generally only have the functions of flow collection and mechanical pointers to display water consumption, this is a great improvement. In addition to recording and electronically displaying the water consumption, the smart IC card water meter can also automatically control the water consumption according to the agreement, and automatically complete the calculation of the water fee for the stepped water price, and at the same time, it can store the water consumption data. Because its data transmission and transaction settlement are carried out through IC cards, it is possible to realize the change from the staff to the door-to-door meter reading and the user to pay the fee at the business office. The IC card transaction system also has the characteristics of convenient transaction, accurate calculation and bank settlement. The appearance of the IC card water meter is basically similar to that of a general water meter, and the installation process is basically the same. The use of the IC card water meter is very simple. From the user's point of view, it is to insert the IC card into the water meter. The working process of the IC card water meter is generally as follows: insert the IC card containing the amount into the IC card reader/writer in the water meter, after the microcomputer module recognizes and downloads the amount, the valve opens and the user can use water normally. When the user uses water, the water collection device starts to collect the water consumption, converts it into a required electronic signal and supplies it to the microcomputer module for measurement, and displays it on the LCD display module. When the user's water consumption drops to a certain value, the microcomputer module will sound an alarm, prompting the user to pay for water with a card. If the amount of water consumption is exceeded, the microcomputer module will automatically close the electronic control valve to cut off the water supply. Until the user inserts the IC card that has been paid and starts to open the valve for water supply.
Wireless remote water meter
The wireless remote water meter is a remote control cold water meter that complies with CE certification. With the help of the MBUS remote meter reading management system, meter reading and control are realized, and the meter data transcription, control, data storage, query, monthly settlement, and meter reading are automatically completed. Various functions such as settlement, charge settlement, report printing, etc., classify the collected data, and complete various complex tasks performed manually.
Wireless remote water meter remote meter reading system consists of wireless remote water meter, collector, concentrator and comprehensive meter reading management system software. Implement the following functions:
Copy function:
Support the meter reading task set by the management center, support the automatic manual copying of data information set by the system, and realize the unattended automatic meter reading function. At the same time, the system also supports manual meter reading function, which can read water meter data at any time.
Prepaid Features:
When the remaining water in the table is less than the set value of the remaining water, the valve will be automatically closed to remind the user to purchase water. After inserting the function card, the valve will be opened, and the remaining water can continue to be used until it reaches 0, and the valve will be automatically closed.
Complete reading data:
User ID, cumulative usage, remaining usage, last purchase, hoarding, number of purchases, meter status, battery status, valve status, fault information and other information.
Anti-flip-installation function: It has the function of self-checking when the water meter is installed upside down. After detecting that the water meter is installed upside down, the valve will be automatically locked.
Anti-breakage function: It has the function of preventing external knocks and electromagnetic damage or external circuit damage, and the water meter is automatically locked.
Wireless remote water meter
Wireless remote water meter
Anti-drip function: It has the function of dripping the watch.
Other functions:
1) Pulse metering
2) Carrier wake-up function
3) Real-time two-way communication
4) Real-time wireless control valve
5) Low voltage alarm
6) Low voltage close valve
7) Disassembly alarm
8) Magnetic attack alarm close valve
10) Regularly report data quantitatively
11) Specify the routing function
12) Disassembly detection function
13) Active fault alarm function (this function can be turned off wirelessly)