The structure of the rotary type water meter is divided into wet type and dry type. There are three types of counters for water meters: - pointer type, second type wheel type; third type.
3. Rotor type water meter mainly consists of case, water filter, measuring mechanism and indicating mechanism. The metering mechanism is mainly composed of an impeller box, an impeller, an impeller shaft and an adjustment plate. The indicating mechanism mainly consists of a dial, a pointer, a triangular pointer or a character wheel, a transmission gear, and the like.
The function principle of the rotary-type water meter is that the water enters the watch case from the water inlet of the water meter, and enters the impeller box through the water inlet hole of the impeller box through the water filter net, impinging on the impeller, the impeller starts to rotate, and the water is further discharged from the upper part of the impeller box. The water outlet of the case flows into the pipe, and the lower part of the impeller is supported by the thimble. After the impeller rotates, the central gear of the impeller is also rotated by the central axis of the impeller, and the transmission gear in the impeller box is driven to rotate according to the rotation speed ratio to drive the pointer on the dial. After the triangle pointer starts to rotate, the other gears and the upper pointer are driven by the decimal transfer mode. According to the index value on the dial, the clockwise rotation is started from 0 to start the metering.
The case is both a bunker for the water meter and the parent of the water meter. The components of the water meter are installed in the case, and the case protects the operation of the components of the water meter. The pipe joints or flanges at both ends of the inlet and outlet are connected with the pipe. The diameter of the inlet and outlet is the diameter of the water meter, and the case requires high pressure and tensile strength.
The water filter net is installed outside the impeller box at the inlet end of the water meter, and the water to be measured is filtered by the inlet end through the water filter net before entering the impeller box. The water filter is used to remove impurities and sediment from the water to prevent malfunction and damage of the water meter.
The impeller box has three functions: one is that water enters the water inlet hole to impact the impeller and then exits from the water outlet; the second is to protect the impeller from rotating; the third is to adjust the impeller speed. The lower part of the impeller box has an adjusting hole and an adjusting plate. The size of the adjusting hole is proportional to the rotating speed of the impeller, and the height of the impeller is inversely proportional to the rotational speed. Because the lower end of the impeller is located at the lower edge of the inlet of the impeller box, the impeller is adjusted upwards, so that the water flow part of the inlet hole will not impact the impeller, so it will become slower, and vice versa. This adjusts the measurement error of the water meter.
The impeller is a sensitive component of the water meter, which changes the kinetic energy of the water into a rotational speed, which is then transmitted to the indicating mechanism through the impeller shaft for indication. impeller
Mechanical Short Arm,Sealey Coil Spring Compressor,Pneumatic Spring Compressor,Air Spring Compressor
WUQIANG HONGMA TOOLS MANUFACTURE CO., LTD , https://www.zjhongma-tool.com