CN217765092U - Flow measuring device with viscosity measurement function - Google Patents
Flow measuring device with viscosity measurement function Download PDFInfo
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- CN217765092U CN217765092U CN202221997380.7U CN202221997380U CN217765092U CN 217765092 U CN217765092 U CN 217765092U CN 202221997380 U CN202221997380 U CN 202221997380U CN 217765092 U CN217765092 U CN 217765092U
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Abstract
The utility model discloses a flow measuring device with viscosity measurement function, including trunk line and differential pressure transmitter, trunk line wherein one end is equipped with the fluid entry, the trunk line other end is equipped with the fluid export, be equipped with the flowmeter on the trunk line, differential pressure transmitter's the pressure point of getting be located the flowmeter both ends respectively. The utility model is used for measure main part mass flow meter and import and export both ends differential pressure, flow compensation database is done to the intelligence gauge outfit to realize heavy-calibre mass flow, large-traffic, wide flow, density, temperature, pressure measurement, can also measure fluid viscosity simultaneously, solved expensive industry on-line viscosity measurement.
Description
Technical Field
The utility model belongs to the technical field of the fluid measurement, concretely relates to flow measuring device with viscosity measurement function.
Background
At present, industrial measuring instruments are widely applied, and an instrument capable of simultaneously measuring multiple parameters on line is popular for users, such as a mass flow meter based on the Coriolis principle, and can simultaneously measure mass flow, volume flow, temperature and density, and if a medium to be measured is two liquid phase fluids with different densities, the volume percentage of each liquid phase fluid can be measured. The online viscometer is expensive, and along with the rapid development of science and technology, the intelligent flowmeter head can realize complex calculation and a flow correction database, a composite pressure differential pressure sensor is added at two ends of the intelligent flowmeter, and the development of a low-cost online viscometer becomes possible.
In utility model a flowmeter 202010505774.5 of multichannel variable range, as follows: the flow calculation method of the flow controller comprises the following steps:
according to the flow formula
Wherein, the beta-aperture ratio, the C-outflow coefficient, the epsilon-expansibility coefficient, the A0-open area, the rho 1-medium working condition density and the delta P-instrument detection differential pressure are measured;
the formula is simplified to Δ ω = (1- β 1.9) Δ P, where Δ ω -pressure loss,
wherein S Opening holes For opening the orifice area of the throttling element, S Cross sectional area The values of S tau of the throttling devices are equal for the sectional area of the pipeline.
Therefore, the granted utility model patent describes that the S τ values of the throttling devices are equal, and the multi-channel variable-range flowmeter can accurately measure, but the fact is that the metering is not necessarily accurate, and for a multiphase fluid or a liquid fluid with a low reynolds number, which contains more than two different physical media, such as different densities and viscosities, even if the S τ values of the throttling devices are equal, the metering error is very large; in the flow dividing and pipe combining flowmeter, differential pressure sensors are arranged at the two ends of the inlet and the outlet of a main flowmeter or an online viscometer is arranged in a pipeline behind a flow dividing and pipe combining flowmeter mixer, and flow correction according to the measured differential pressure value or viscosity value is the key point for ensuring the metering accuracy of the multi-channel variable-range flowmeter and the flow dividing and pipe combining flowmeter. However, in the prior art, no related art can solve the above problems well.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that just is not enough to above-mentioned prior art, provide a flow measuring device with viscosity measurement function for measure main part mass flow meter and import and export both ends differential pressure, flow compensation database is done to the smart gauge outfit, thereby realize heavy-calibre mass flow, large-traffic, wide flow, density, temperature, pressure measurement, can also measure fluid viscosity simultaneously, solved expensive industry on-line viscosity measurement.
The utility model adopts the technical proposal that: the utility model provides a flow measuring device with viscosity measurement function, includes trunk line and differential pressure transmitter, the trunk line wherein one end is equipped with the fluid entry, the trunk line other end is equipped with the fluid export, be equipped with the flowmeter on the trunk line, differential pressure transmitter's the pressure tapping point be located the flowmeter both ends respectively.
In one embodiment, the flow meter is a mass flow meter.
In one embodiment, outlet flanges are arranged at two ends of the flowmeter, one end, close to the flowmeter, of a pressure taking point of the differential pressure transmitter is connected with the outlet flanges through an externally-matched connecting flange, and a throttling element is arranged between the externally-matched connecting flange and the outlet flanges.
In one embodiment, a branch pipeline is arranged on the main pipeline between the fluid inlet and the fluid outlet, and two ends of the branch pipeline, which are communicated with the main pipeline, are respectively arranged on two sides of the flow meter.
In one embodiment, a full-bore ball valve is arranged on the branch pipeline.
In one embodiment, a branch point is formed at the joint of the main pipe and the branch pipe, and a mixer is arranged between the fluid inlet and the branch point.
The beneficial effects of the utility model reside in that:
1. the flow of three media of gas phase and liquid phase can be measured, and the multiphase flow measuring capacity is realized;
2. the branch pipeline is arranged, so that the fluid can be divided for measuring the large-caliber large-flow fluid;
3. the branch pipeline is arranged, the fluid can be divided, the flow meter is a mass flowmeter, and the flow measurement range is wide;
4. the set flowmeter can obtain the fluid flow, the fluid temperature and the fluid density, the set differential pressure transmitter can obtain the differential pressure value and the fluid pressure at two ends of the flowmeter, and the fluid viscosity can be obtained through calculation, so that the measurement of the fluid viscosity is realized;
5. the mass flow meter is mainly adopted, the traditional mass flow meter is two measuring pipes, the inner diameter of the two measuring pipes is basically reduced, the inlet area of the flow meter is far larger than the equivalent area of the two measuring pipes, if the device is provided with a branch pipeline, the device is flexibly designed according to working conditions, designed according to requirements and pressure loss requirements, the diameter reduction is basically not needed, the energy consumption of pipeline transportation is greatly reduced, and meanwhile, the energy is saved;
6. the flowmeter does not need a front straight pipe section and a rear straight pipe section, only needs a small-caliber flowmeter and a straight pipe, and has the characteristics of small volume and low transportation and installation cost compared with a large-caliber flowmeter with the same caliber, and the volume is greatly reduced.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of embodiment 2 of the present invention;
fig. 3 is a schematic structural view of embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of an alternative of the present invention.
In the figure: 1. a main pipeline; 2. a differential pressure transmitter; 3. a fluid inlet; 4. a fluid outlet; 5. a flow meter; 6. an outlet flange; 7. a throttle member; 8. branch pipelines; 9. a full bore ball valve; 10. a mixer; 11. Taking a pressure point; 12. externally matching a connecting flange; 13. a diversion part; 14. an on-line viscosity and temperature compound sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1:
as shown in fig. 1, a flow measuring device with viscosity measurement function, includes main pipeline 1 and differential pressure transmitter 2, main pipeline 1 wherein one end is equipped with fluid inlet 3, the main pipeline 1 other end is equipped with fluid outlet 4, be equipped with flowmeter 5 on the main pipeline 1, differential pressure transmitter 2's pressure tapping point 11 be located flowmeter 5 both ends respectively.
In this embodiment, the flow meter 5 is a mass flow meter.
In the embodiment, fluid enters the main pipeline 1 from the fluid inlet 3, the flowmeter 5 acquires the fluid flow, the fluid temperature and the fluid density, and the differential pressure transmitter 2 acquires the differential pressure value and the fluid pressure at two ends of the flowmeter. From the measured fluid data, the average kinematic viscosity, hydrodynamic viscosity and total flow of the fluid can be calculated.
Wherein, pressure taking point 11 that differential pressure transmitter 2 and main pipeline 1 are connected is equipped with the pressure taking short circuit to connect differential pressure transmitter 2 and main pipeline 1. For satisfying better installation effect, can set up support installation differential pressure transmitter 2, the support can be connected with flowmeter 5, also can set up alone.
Example 2:
as shown in fig. 2, a flow measuring device with viscosity measurement function, includes main pipeline 1 and differential pressure transmitter 2, main pipeline 1 wherein one end is equipped with fluid inlet 3, the main pipeline 1 other end is equipped with fluid outlet 4, be equipped with flowmeter 5 on the main pipeline 1, differential pressure transmitter 2's pressure tapping point 11 be located flowmeter 5 both ends respectively.
In this embodiment, the flow meter 5 is a mass flow meter.
In this embodiment, outlet flanges 6 are arranged at two ends of the flowmeter 5, one end of a pressure taking point 11 of the differential pressure transmitter 2, which is close to the flowmeter 5, is connected with the outlet flange 6 through an externally-matched connecting flange 12, and a throttling element 7 is arranged between the externally-matched connecting flange 12 and the outlet flange 6.
In the embodiment, fluid enters the main pipeline 1 from the fluid inlet 3, the flowmeter 5 acquires the fluid flow, the fluid temperature and the fluid density, and the differential pressure transmitter 2 acquires the differential pressure value and the fluid pressure at two ends of the flowmeter. From the measured fluid data, the average kinematic viscosity, hydrodynamic viscosity and total flow of the fluid can be calculated.
Wherein, pressure taking point 11 that differential pressure transmitter 2 and main pipeline 1 are connected is equipped with the pressure taking short circuit to connect differential pressure transmitter 2 and main pipeline 1. For satisfying better installation effect, can set up support installation differential pressure transmitter 2, the support can be connected with flowmeter 5, also can set up alone. The throttle 7 is arranged to increase the differential pressure value to avoid small flow without differential pressure value.
Example 3:
as shown in fig. 3, a flow measuring device with viscosity measurement function, including main pipeline 1 and differential pressure transmitter 2, main pipeline 1 wherein one end is equipped with fluid inlet 3, the main pipeline 1 other end is equipped with fluid outlet 4, be equipped with flowmeter 5 on the main pipeline 1, differential pressure transmitter 2 get pressure point 11 and be located flowmeter 5 both ends respectively.
In this embodiment, the flow meter 5 is a mass flow meter.
In this embodiment, outlet flanges 6 are arranged at two ends of the flowmeter 5, one end, close to the flowmeter 5, of a pressure taking point 11 of the differential pressure transmitter 2 is connected with the outlet flanges 6 through an externally-matched connecting flange 12, and a throttling element 7 is arranged between the externally-matched connecting flange 12 and the outlet flanges 6.
In this embodiment, a branch pipe 8 is arranged at a position between the fluid inlet 3 and the fluid outlet 4 on the main pipe 1, and two ends of the branch pipe 8, which are communicated with the main pipe 1, are respectively located at two sides of the flowmeter 5.
In this embodiment, the branch pipe 8 is provided with a full-bore ball valve 9.
In this embodiment, a branching portion 13 is formed at a connection portion of the main pipe 1 and the branch pipe 8, and a mixer 10 is disposed between the fluid inlet 3 and the branching portion 13.
In the embodiment, fluid enters the main pipeline 1 from the fluid inlet 3, the flowmeter 5 acquires the fluid flow, the fluid temperature and the fluid density, and the differential pressure transmitter 2 acquires the differential pressure value and the fluid pressure at two ends of the flowmeter. From the measured fluid data, the average kinematic viscosity, hydrodynamic viscosity and total flow of the fluid can be calculated. In the measuring process, according to the demand, can open the full latus rectum ball valve 9 on the branch pipeline 8, let the fluid get into branch pipeline 8 to reach better measuring effect. As shown in fig. 3, when the branch pipe 8 is provided, the middle of the main pipe 1 is recessed toward one side to form two straight pipe sections respectively communicated with the fluid inlet 3 and the fluid outlet 4 and a bent pipe section for installing the flowmeter 5, and two ends of the branch pipe 8 are respectively connected with the two straight pipe sections. Fig. 3 shows a preferred option, and other main pipes 1 and branch pipes 8 can be installed to meet the requirements of the device.
Wherein, pressure taking point 11 that differential pressure transmitter 2 and main pipeline 1 are connected is equipped with the pressure taking short circuit to connect differential pressure transmitter 2 and main pipeline 1. For satisfying better installation effect, can set up support installation differential pressure transmitter 2, the support can be connected with flowmeter 5, also can set up alone. The throttle 7 is arranged to increase the differential pressure value to avoid small flow without differential pressure value. The mixer 10 is arranged to fully mix the fluid before the fluid enters the measurement, so as to ensure the accuracy of the subsequent measurement.
Referring to fig. 4, in addition to embodiments 1-3, in addition to embodiment 3, the purpose of obtaining total flow rate by viscosity measurement can be achieved by eliminating differential pressure transmitter 2 and adding on-line viscosity-temperature complex sensor 14 to mixer 10.
In the traditional mode, a large-caliber and large-flow fluid needs to be measured by a large and long flowmeter, and if the caliber of the flowmeter 5 is more than 200mm, the measurement error is also large; at the same time, larger, longer flowmeters 5 are more costly. This application sets up the small transfer line 8, can shunt the fluid, shunts the fluid through small transfer line 8 to satisfy the large-traffic fluidic measurement of heavy-calibre.
In fluid measurement, span ratio is an important parameter reflecting the flow measurement range. The range ratio of the conventional flowmeter is 10, the range ratio of the mass flowmeter is 50-100, and if the fluid is divided and the mass flowmeter is used, the range ratio is 800; this application sets up a pipeline 8, and flowmeter 5 is mass flow meter, can shunt the fluid for the flow measurement scope of device is wideer.
The flowmeter 5 of the application mainly adopts a mass flow meter, the traditional mass flow meter is two measuring pipes, the inner diameter of the two measuring pipes is basically reduced, the inlet area of the mass flow meter is far larger than the equivalent area of the two measuring pipes, for example, the mass flow meter of a large-diameter straight pipe with the diameter of 250mm of Germany Koron company, the diameter reduction area is 50 percent of the inlet area, and the diameter of 100mm is 40 percent. If the branch pipeline 8 is arranged, the device is designed flexibly according to working conditions and designed according to requirements on pressure loss, the diameter reduction is basically not needed, the energy consumption of pipeline transportation is greatly reduced, and meanwhile, the device is more energy-saving.
Example 1 to example 3, the flow rate measurement device having a viscosity measurement function according to any one of examples, which includes a measurement method of the flow rate measurement device having a viscosity measurement function, includes the steps of:
step 20, the flowmeter 5 acquires the fluid flow, the fluid temperature and the fluid density, the differential pressure transmitter 2 acquires the differential pressure value and the fluid pressure at two ends of the flowmeter, and the step 30 is entered;
step 30, calculating the average kinematic viscosity of the fluid through a formula, and entering step 40, wherein the calculation formula is as follows:
△P＝f(ρ,Q,v,T,P)，
wherein, Δ P is a differential pressure value at two ends of the flowmeter 5, ρ is a fluid density, Q is a fluid flow rate, v is a fluid average kinematic viscosity, T is a fluid temperature, and P is a fluid pressure;
step 40, calculating the hydrodynamic viscosity according to the fluid average motion viscosity calculated in the step 30, and entering the step 50, wherein the calculation formula is as follows:
μ＝V×ρ，
wherein mu is the hydrodynamic viscosity, v is the fluid average kinematic viscosity, and ρ is the fluid density;
step 50, calculating to obtain total flow according to the hydrodynamic viscosity obtained in the step 40, and entering a step 60;
and 60, discharging the fluid out of the main pipeline 1 through the fluid outlet 4, and finishing measurement.
In this embodiment, in step 30, the method further includes a step of correcting the average kinematic viscosity of the fluid:
establishing a different fluid viscosity and differential pressure comparison database formed by corresponding relations of the fluid average kinematic viscosity and the differential pressure;
and (3) comparing the differential pressure values at two ends of the flowmeter 5 acquired by the differential pressure transmitter 2 in the step (20) with the fluid average kinematic viscosity calculated in the step (30) and a differential pressure comparison database of different fluid viscosities, judging whether the corresponding relation between the differential pressure values at two ends of the flowmeter 5 acquired by the differential pressure transmitter 2 in the step (20) and the fluid average kinematic viscosity calculated in the step (30) is consistent with the corresponding relation in the differential pressure comparison database of different fluid viscosities, if so, entering a step (40), and if not, correcting the fluid average kinematic viscosity into the fluid average kinematic viscosity corresponding to the differential pressure values at two ends of the mass flowmeter acquired by the differential pressure transmitter in the step (20) in the differential pressure comparison database of different fluid viscosities, and entering the step (40).
In this embodiment, in step 50, if the main pipe is provided with the branch pipe 8, the total flow is calculated by the hydrodynamic viscosity obtained in step 40, which is specifically as follows:
establishing a fluid dynamic viscosity diversion correction coefficient database;
acquiring a corresponding shunting correction coefficient according to the established hydrodynamic viscosity shunting correction coefficient database and the hydrodynamic viscosity calculated in the step 40;
and calculating to obtain total flow according to the obtained shunting correction coefficient, wherein the calculation formula is as follows:
wherein Q v Beta is the aperture ratio, C is the outflow coefficient of the throttle element 7, epsilon is the shunt correction coefficient, A 0 The orifice area of the orifice 7 is defined as ρ, the fluid density, and Δ P, the differential pressure across the flowmeter 5.
In this embodiment, in step 50, if no branch pipe is provided on the main pipe, the total flow is measured by a flow meter.
In the above measurement method, the calculation formula of the aperture ratio is as follows: and beta = D/D, wherein D is the equivalent opening diameter of the throttling element, and D is the inner diameter of the main pipeline 1.
In the measuring method, on the premise that the structural size of the flow measuring device with the viscosity measuring function is a certain size, the measured differential pressure values at two ends of the flowmeter 5 are in direct proportion to the average kinematic viscosity of the fluid, and the corresponding relation between the differential pressure values at two ends of the flowmeter 5 and the average kinematic viscosity of the fluid can be obtained through the database, namely under any working condition, the known fluid flow, fluid density, fluid temperature and fluid pressure can be used for obtaining test data according to the differential pressure values at two ends of the flowmeter 5 corresponding to the average kinematic viscosity of different standard fluids, so that different fluid viscosity and differential pressure comparison databases are established. Meanwhile, in the above measurement method, the hydrodynamic viscosity is calculated, and for a flow measurement device with a certain size and a viscosity measurement function and with a branch pipe 8, the diversion correction coefficients are different for fluids with different dynamic viscosities, so that a hydrodynamic viscosity diversion correction coefficient database can be established.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (6)
1. The utility model provides a flow measuring device with viscosity measurement function, its characterized in that, includes trunk line and differential pressure transmitter, trunk line wherein one end is equipped with the fluid entry, the trunk line other end is equipped with the fluid export, be equipped with the flowmeter on the trunk line, differential pressure transmitter's the pressure point of getting be located the flowmeter both ends respectively.
2. A flow measuring device having a viscosity measuring function according to claim 1, wherein the flow meter is a mass flow meter.
3. The flow measuring device with the viscosity measuring function according to claim 1 or 2, wherein outlet flanges are provided at both ends of the flowmeter, one end of the pressure taking point of the differential pressure transmitter, which is close to the flowmeter, is connected with the outlet flanges through an externally-fitted connecting flange, and a throttling element is provided between the externally-fitted connecting flange and the outlet flanges.
4. A flow measuring device having a viscosity measuring function according to claim 3, wherein a branch pipe is provided on the main pipe at a position between the fluid inlet and the fluid outlet, and both ends of the branch pipe communicating with the main pipe are respectively located on both sides of the flowmeter.
5. The flow measuring device with viscosity measuring function according to claim 4, wherein the branch conduit is provided with a full-bore ball valve.
6. The flow rate measuring device with viscosity measurement function according to claim 5, wherein the junction of the main pipe and the branch pipe forms a branch point, and a mixer is arranged between the fluid inlet and the branch point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221997380.7U CN217765092U (en) | 2022-07-28 | 2022-07-28 | Flow measuring device with viscosity measurement function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221997380.7U CN217765092U (en) | 2022-07-28 | 2022-07-28 | Flow measuring device with viscosity measurement function |
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| CN217765092U true CN217765092U (en) | 2022-11-08 |
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| CN202221997380.7U Active CN217765092U (en) | 2022-07-28 | 2022-07-28 | Flow measuring device with viscosity measurement function |
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