Water meter structure principle

The structure of the traditional water meter traditional water meter The traditional water meter's internal structure can be divided into shell, sleeve and inner core from the outside. The shell is cast from cast iron and the water passes through the lower annular space of the shell after coming out of the inlet. This is called the “lower ring room”. Above this annular space there is an "upper ring chamber" communicating with the outlet. At the bottom of the sleeve is a filter with holes to filter out impurities in the water. There are two rows of upper and lower circular holes on the side of the sleeve. The position of the hole is exactly opposite the upper and lower rings of the housing. Obviously, the lower row is the inlet hole and the upper row is the outlet hole. It is particularly noteworthy that the two rows of holes are slanted along the tangential direction of the circle. Note the opposite direction of the holes in the top and bottom rows. Water flows in from the lower row of holes in a tangential direction, which is bound to create a rotating stream, 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 is seen from the glass window, with only the pointer and dial. In fact, the most important thing is the lower layer. There is a plastic wheel inside. There are many plastic blades on the wheel, called "impeller". The impeller is located exactly in the swirling flow formed by the hole in the lower layer of the casing. The flow of water impinges on the blades around the wheel, creating a torque that rotates the impeller. The bigger the faucet is opened, the faster the water flow and the faster the impeller will turn. The axis of the impeller reaches the middle level vertically. There is a pinion on the shaft and it is meshed with “decimal number gear” to achieve the purpose of cumulative rotation. The function of "decimal number gears" is that every tenth gear rotates ten times and the ten-digit gear rotates one revolution. In other words, the single-digit gear turns one revolution, and the ten-digit gear turns one-tenth of a turn. The single-digit gear is the active one, relying on it to drive the ten-digit gear. In fact, each stage of decimal point is completed with two pairs of gears, so that the direction of rotation is the same, with one pair of gear ratios being 9:30 and the other pair being 10:30. These two pairs are connected in series and the total gear ratio is this The product of the two, 0.099999, is exactly 0.1. According to this calculation, if you want to read seven digits (read the four decimal places before the decimal point is a black scale, and read the red decimal place after the decimal point), you have to use 12 pairs of gears. In addition to other uses, it is possible to squeeze in 18 shafts and 34 gears in this small middle space, which can also be regarded as high-density installation. This type of meter is simple and inexpensive, it can be used in a humid environment for a long period of time without maintenance, and it does not require a power supply. The advantages of a power outage that does not affect the work will still be long-term service.

Intelligent IC Card Water Meter Smart IC Card Water Meter is a new type of water meter that uses modern micro-electronic technology, modern sensor technology, and smart IC card technology to measure water consumption and transmit water data and settlement transactions. This is a great improvement compared with the traditional water meter which only has the function of flow collection and mechanical indicator water consumption. In addition to recording and electronically displaying the water consumption, the smart IC card water meter can automatically control the water consumption according to the agreement, and automatically calculate the water fee for the stepped water price, and can also perform the function of water data storage. Since the water meter data transmission and transaction settlement are performed through the IC card, it is possible to realize the transition from the employee's door-to-door metering charges to the user's own payment to 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 normal 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, insert the IC card card into the water meter. The working process of the IC card water meter is generally as follows: The IC card containing the amount is inserted into the IC card reader/writer in the water meter. After the computer module recognizes and downloads the amount, the valve is opened, and the user can use water normally. When the user uses water, the water collecting device starts to collect the water consumption, converts it into the required electronic signal and supplies the microcomputer module for measurement, and displays it on the LCD display module. When the amount of water used by the user drops to a certain value, the microcomputer module sounds an alarm, prompting the user to pay for the purchase of water through the card. If the amount of water is exceeded, the microcomputer module will automatically close the electronically controlled valve and cut off the water supply. Until the user inserts the paid IC card, the valve is again opened to supply water.