Scale vortex flowmeter in the application of water cooling system

Abstract: the scale vortex flowmeter in the application of water-cooling system information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1 introduction walking beam type reheating furnace adopts high speed wire rod mill at four static beam, five beam structure, within the beam adopts the circulating water cooling method for beams cooling. So, the normal flow of cooling water is to ensure that the nine beams will not be fallen down one of the key elements. Water pressure is not necessarily. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a scale vortex flowmeter in water cooling system, the application of article details. 1 introduction walking beam type reheating furnace adopts high speed wire rod mill at four static beam, five beam structure, within the beam adopts the circulating water cooling method for beams cooling. So, the normal flow of cooling water is to ensure that the nine beams will not be fallen down one of the key elements. Have water pressure does not necessarily have water flow, this is the author's experience in a company, learning. The company subordinate factory of walking beam type reheating furnace of the bar indicator for pressure of water circulation system mainly adopts detection, due to the blockage, after secondary instrument pressure indication, actual did not flow, led to the worst effects of the furnace to burn down. Therefore, in the water cycle system adopted in high speed wire rod mill at a way to check the water flow is given priority to, and nine in the cooling water main girder respectively installed a SINIER vortex flowmeter. SINIER vortex flowmeter with instrument constant stability, easy in the harsh environment to ensure accuracy, wide range, the medium to be measured is wide, Gas, liquid and steam) , small pressure loss, high precision, small amount of maintenance and other characteristics, the use of more common in each production unit. And it in the measurement of volume flow, almost not affected by velocity, density, the effects of parameters such as pressure, temperature, viscosity. The author in the daily work of the type of instrument operation method to description of a series of problems and deal with the problem. 2 composition and function of vortex flowmeters instrument consists of the following six parts: transmitter shell: body vortex occurred: signal detection, the output amplifier, pulse shaper: input amplifier. Shell is a part of the fluid piping in the transmitter, the dry chose the suitable size, body shape and size of vortex street, fluid flow in the shell can be produced in a wide scope of Reynolds number stable vortex signal. Vortex occurring body make generated when the fluid flows through the vortex street, signal detector vortex street and go into the pulse signal. Input amplifier will faint signal amplification and filter interference signals. Pulse shaping device converts irregular pulses of electricity to amplitude and width of square wave signal. The output amplifier converts square wave signal is amplified to a 4 - 20 ma dc current signal output, and output pulse pulse signal, For the use of integrating supply flow) 。 3 working principle of vortex flowmeters is the use of fluid around the streamline body produces karman vortex street flowmeter made this * body vibration phenomenon. This flowmeter is given only is proportional to the velocity of the pulse frequency signal, and the fluid temperature, pressure, composition, viscosity and density, etc. No relationship. F = S, _I - 4 d / ( D） ld”1本; 4 his r DJ_ upright, d type of jF average flow velocity for the vortex frequency jv for the pipe jd for the plume flow surface width of attack iD for pipe diameter jS, as Mr Straw number. When vortex in on both sides of the cylinder, cylinder by alternating with flow vertical lift, lift the change of frequency is the frequency of vortex. Using embedded within the cylinder of the change of the piezoelectric element to detect the lift, is transformed into frequency signal to the amplifier, the amplifier amplification and plastic, its frequency and velocity is proportional to the square wave signal, the circuit block diagram is shown in figure 1. By the visible on type, can be calculated by measuring the frequency of vortex street flow velocity u, in turn, by the pipe diameter and flow velocity and flow rate, figure 2 to spiral. 4 meter debug no liquid flow in the pipe, because the noise made by pipeline vibration receiver abnormally count, then it should be for instrument which can adjust the sensitivity. 41 the adjustment of the amplifier gain usually don't need to adjust the gain of the amplifier, unless after replacement of the sensor, by the AMP on the amplifier board A potentiometer to adjust the amplifier gain. 42 zero adjustment correct connection, through the low frequency signal generator to vortex flowmeter signal input amplitude is zero, adjust the zero point adjustment potentiometer. Digital multimeter display value of 4 ma. 43 the adjustment of the full scale if you don't know the full range of frequency, through zui big flow rate, calculate the five full range frequency.

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