Detailed description of the internal structure principle of traditional instruments

Abstract: The detailed information on the internal structure and principle of traditional instruments is provided by excellent flowmeter and flowmeter manufacturers. 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 casing is cast iron, and the water passes through the lower annular space of the casing after coming out of the water inlet, which is called the lower annular chamber here. Above this annular space there is an upper annular chamber. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is a detailed description of the internal structure and principles of traditional meters. 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 the water passes through the lower annular space of the shell after coming out of the water inlet, which is called here“Lower Room”. Above this annular space there is“Sheung Wan Room”connected to 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. There is a plastic wheel inside. There are many plastic blades on the edge of the wheel, called“impeller”. 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 communicate with“decimal number gear”Meshing to achieve the purpose of accumulating the number of revolutions.“decimal number gear”The function is that every time the one-digit gear rotates 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. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Detailed description of the internal structure principle of traditional instruments'

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