Manufacturer of waist wheel flowmeter

Manufacturer of waist wheel flowmeterOverview

The waist wheel flowmeter is mainly used for flow measurement of large-diameter gas, liquid, and steam medium fluids in various industries' industrial pipelines. The characteristics of waist wheel flowmeter are small pressure loss, large range, high accuracy, and almost no influence of fluid density, pressure, temperature, viscosity and other parameters when measuring volumetric flow rate under working conditions. There are no movable mechanical parts, so it has high reliability and low maintenance. The instrument parameters can work stably for a long time. The plug-in waist wheel flowmeter adopts a piezoelectric stress sensor with high reliability and can operate within a temperature range of -20 ℃ to+250 ℃. It has both analog standard signals and digital pulse signal outputs, making it easy to use in conjunction with digital systems such as computers. It is an advanced and ideal flow meter for waist wheel flow meters. The RY-LUCB plug-in vortex flowmeter is explosion-proof and complies with the relevant provisions of GB3836-83 "Explosion proof Electrical Equipment for Explosive Environments". The explosion-proof mark is ExdIIBT6.

Manufacturer of waist wheel flowmeterworking principle

Instrument structure

The flowmeter consists of a Roots flow sensor and accessories. As shown in Figure 1:

Instrument structure

The waist wheel flowmeter, also known as the Roots flowmeter, is characterized by a measuring chamber inside the flowmeter housing, which contains one or two pairs of waist wheels that can rotate tangentially. A pair of transmission gears are coaxially installed outside the flowmeter housing with two search wheels, which mesh with each other to enable the two waist wheels to interlock with each other^[2]

The working principle of the waist wheel flowmeter can be analyzed from the four processes in Figure 2-1. Firstly, structurally, the outer foot of the waist wheel and the inner wall of the flowmeter housing can form a "bucket" space with a certain volume We call it the 'measurement room'. When a fluid passes through a flowmeter, it is affected by the differential pressure between the fluid at the inlet and outlet of the flowmeter The two waist wheels will rotate in the positive direction. In Figure 2-1 (1), a closed measuring chamber is formed by the waist wheel Q1 and the housing. The fluid filled in the measuring chamber is a single volume separated by the waist wheel from the continuous fluid at the inlet. From the force analysis of the connecting wheel, it can be seen that the waist wheel Q1 is the driving wheel at this time The fluid pressure experienced by Q2 is balanced with each other No rotational force is generated. So it's a driven wheel. When Q1 drives Q2 to rotate to the position shown in Figure 2-1 (2), the fluid in the measuring chamber is discharged towards the outlet of the flow meter. From the analysis of the force on the waist wheel, it can be seen that At this point, both waist wheels generate rotational force in the direction of the arrows in the figure Rotate the two waist wheels to the position shown in Figure 2-1 (3). At this point, the state is opposite to (1). A closed measuring chamber is formed by the waist wheel Q2 and the housing The fluid filled in the measuring chamber is another individual volume separated by the waist wheel from the continuous fluid at the inlet. and. From the analysis of the force on the waist wheel, it can be seen that at this time, the waist wheel Q2 is the driving wheel, while the fluid pressure on Q1 is balanced with each other, and no rotational force is generated, so it is the driven wheel. Driven by Q2, rotate to the position shown in Figure 2-1 (4) Discharge the fluid from the measuring chamber back to the outlet of the flow basin meter. Similar to the state of (2), both waist wheels generate rotational force in the direction of the arrows in the figure, causing the two eye wheels to continue rotating to the position shown in Figure 2-1 (1). At this point, the two wheel rotors have rotated a total of 180 '. The fluid from two measuring chambers is discharged towards the outlet of the flow meter^[2]

Manufacturer of waist wheel flowmeterDensity inspection

The accuracy level and function of the waist wheel flowmeter are selected based on measurement requirements and usage scenarios to achieve cost-effectiveness. For example, in situations where waist wheel flow meters are used for trade settlement, product handover, and energy measurement, gas flow sensors should be selected with higher accuracy levels, such as 1.0, 0.5, or higher; For process control applications, gas flow sensors are selected with different accuracy levels according to control requirements; In some cases where only the process flow rate needs to be detected without precise control and measurement, a slightly lower accuracy level, such as 1.5, 2.5, or even 4.0, can be selected. In this case, a low-cost plug-in turbine flowmeter can be used.