Mass and volume flow measuring device and method

Abstract

The application relates to the technical field of metering, and discloses a mass flow and volume flow measuring device and method. Regarding the device, a measuring container is arranged in a closed container; a medium input channel controls the flow of a to-be-measured medium into the measuring container through a first branch or into the closed container through a second branch by means of a flow direction switching switch valve; a timing element is used for measuring the time required for the measuring container to change from an empty state to a full state of the to-be-measured medium; and a discharge mechanism is used for discharging the to-be-measured medium in the measuring container. The technical scheme of the application is not limited by objective conditions such as the distribution of pipeline fluid and the installation accuracy of a measuring element, and can fully guarantee the accuracy of measuring data; the volume flow, mass flow and density of a pure liquid phase fluid can be measured at one time, and the liquid phase volume flow, liquid phase mass flow, liquid phase mass percentage, solid phase volume flow, solid phase mass flow and solid phase mass percentage of a solid-liquid two-phase fluid can also be measured at one time.

Description

Technical Field

[0001] This invention relates to the field of metrology, specifically to a device and method for measuring mass flow rate and volumetric flow rate. Background Technology

[0002] Among existing mature automated measurement products, flow meters for measuring volume can be broadly categorized into orifice plate flow meters, vortex flow meters, turbine flow meters, electromagnetic flow meters, rotor flow meters, ultrasonic flow meters, and oval gear flow meters. These flow meters, through different principles, can measure the volumetric flow rate of liquid or gaseous fluids. Mature products for measuring mass flow rate include direct mass flow meters, indirect mass flow meters, thermal mass flow meters, differential pressure mass flow meters, and Coriolis mass flow meters. These flow meters can measure the mass flow rate of liquid or gaseous fluids.

[0003] A search revealed that Chinese patent document CN106404134A discloses a method and apparatus for measuring the mass of solids in a solid-liquid two-phase mixture; and Chinese patent document CN107255499B discloses a device and method for measuring the evaporation capacity of a multi-effect evaporation system. These methods have the following problems: 1. The measurement function is relatively simple, unable to achieve simultaneous measurement of multiple parameters using a single measuring element; 2. The measuring element is a normal pressure element, resulting in a loss of dynamic pressure head in the measured liquid phase, making it impossible to complete subsequent fluid transport independently, requiring the use of external equipment such as pumps.

[0004] Analysis reveals that mature automated measuring elements have numerous drawbacks, including limitations in usage conditions, variations in measurement accuracy, high operating costs, and the risk of material corrosion. Among these, the biggest deficiency of existing mature products is their inability to measure the mass flow rate and mass percentage of the solid and liquid phases in a solid-liquid mixture, and existing measuring elements are all single-function measuring elements (either capable of measuring volumetric flow rate or, at best, both volumetric and mass flow rates). Summary of the Invention

[0005] This application provides a mass flow rate and volumetric flow rate measuring device and method to solve the aforementioned technical problem that the prior art can only perform relatively single-function measurements.

[0006] According to one aspect of this application, one embodiment provides a mass flow rate and volumetric flow rate measuring device, comprising:

[0007] Sealed container;

[0008] A measuring container is disposed within the sealed container; the measuring container has an opening.

[0009] A medium input channel is connected to the sealed container; the medium input channel controls the flow direction switching valve to allow the medium to be measured to flow into the measuring container via the first branch, or into the sealed container via the second branch through the opening.

[0010] A medium output channel is connected to the bottom of the sealed container;

[0011] A timing element for measuring the time taken for the measuring container to be filled with the test medium; and

[0012] A discharge mechanism for emptying the test medium from the measuring container.

[0013] In one embodiment, the discharge mechanism is configured as a tilting actuator that tilts the measuring container and pours out the medium to be measured inside the measuring container; the tilting actuator is fixed inside the sealed container.

[0014] In one embodiment, the tilting actuator includes:

[0015] Support rods are fixed on opposite sides of the measuring container;

[0016] A bracket, connecting the free end of the support rod and forming a rotatable fit; the bracket is used to support the measuring container; and

[0017] A motor is connected to the end of the support rod; the motor is used to rotate the support rod to tilt the measuring container.

[0018] In one embodiment, the sealed container is configured as a pressure-resistant sealed shell and is formed as a container structure; the top of the pressure-resistant sealed shell is connected to a gas source input channel, and an input switch valve is connected to the gas source input channel.

[0019] In one embodiment, the upper section of the sealed container is connected to a gas phase pressure transmitter, and the lower section of the sealed container is connected to a liquid phase pressure transmitter.

[0020] In one embodiment, the mass flow rate and volumetric flow rate measuring device further includes a weight sensor for measuring the mass of the medium to be measured in the measuring container; two weight sensors are provided, one of which is disposed below the tilting actuator.

[0021] According to one aspect of this application, one embodiment provides a method for measuring mass flow rate and volumetric flow rate, employing the mass flow rate and volumetric flow rate measuring device as described in any of the above claims; the mass flow rate and volumetric flow rate measuring method includes the following steps:

[0022] S1. The medium input channel injects the medium to be tested into the sealed container through the first branch, and the medium output channel is adjusted to keep the liquid level in the sealed container at a constant height.

[0023] S2. The medium input channel injects the test medium into the measuring container through the second branch. Before injecting the test medium, the measuring container should drain all the previously retained test medium.

[0024] S3. After the measuring container is filled, the flow direction switching valve switches the flow of the medium to be measured into the sealed container; at the same time, the timing element measures the time t taken for the measuring container to go from an empty state to a state where the medium to be measured is full.

[0025] S4. The discharge mechanism empties the test medium from the measuring container;

[0026] S5. Calculate the volumetric flow rate Q of the solid phase in the medium to be measured. 固 Mass flow rate F 固 and mass percentage P 固 One or more data in, and / or,

[0027] Calculate the volumetric flow rate Q of the liquid phase in the medium to be measured. 液 Mass flow rate F 液 Percentage of mass (P) 液 One or more data in the data;

[0028] The calculation formula is as follows:

[0029]

[0030]

[0031]

[0032] P 液 =1-P 固 (7)

[0033]

[0034]

[0035] Wherein, the solid density is ρ 固 (Given) The density of the liquid is ρ 液 (Given) The volume of the measuring container is V, the weight of the measuring container is m1, and the total weight of the measuring container when it is filled with the liquid to be measured is m2.

[0036] In one embodiment, the method for measuring mass flow rate and volumetric flow rate further includes the following steps:

[0037] S0. The gas source input channel is based on a gas phase pressure transmitter, which controls the gas source to fill the sealed container and maintain the set pressure value.

[0038] In one embodiment, step S1, adjusting the medium output channel to maintain a constant liquid level in the sealed container, includes the following steps:

[0039] The liquid level in a closed container is measured by the difference between the gas phase pressure transmitter and the liquid phase pressure transmitter, and the flow rate of the interlocking medium output channel is adjusted to maintain a constant liquid level.

[0040] According to one aspect of this application, one embodiment provides a method for measuring mass flow rate and volumetric flow rate, comprising the following steps:

[0041] S1. The timing element measures the time t from the first state to the second state when the measuring container is filled with the medium to be tested, and the weight sensor measures the weight of the measuring container in the first state as m1 and the weight of the measuring container in the second state as m2. In the second state, the measuring container is filled with the medium to be tested, and m2 is the total weight of the measuring container and the medium to be tested. After the timing element and the weight sensor have completed their measurements, the measuring container discharges the medium to be tested.

[0042] S2. Calculate the volumetric flow rate Q of the solid phase in the medium to be measured. 固 Mass flow rate F 固 and mass percentage P 固 One or more data in, and / or,

[0043] Calculate the volumetric flow rate Q of the liquid phase in the medium to be measured. 液 Mass flow rate F 液 Percentage of mass (P) 液 One or more data in the data;

[0044] The calculation formula is as follows:

[0045]

[0046]

[0047]

[0048] P 液 =1-P 固 (7)

[0049]

[0050]

[0051] Wherein, the solid density is ρ 固 (Given) The density of the liquid is ρ 液 (Given) The volume of the container being measured is V.

[0052] The technical solutions of the above embodiments of this application are not limited by objective conditions such as pipeline fluid distribution and the accuracy of measuring element installation, and can fully guarantee the accuracy of measurement data. They can complete the measurement of volumetric flow rate, mass flow rate, and density of pure liquid fluids in one operation, and can also complete the measurement of liquid phase volumetric flow rate, liquid phase mass flow rate, liquid phase mass percentage, solid phase volumetric flow rate, solid phase mass flow rate, and solid phase mass percentage of solid-liquid two-phase fluids in one operation. Furthermore, the design of the evacuable measuring container allows for the complete discharge of liquid and solid from the measuring container after each measurement, ensuring the accuracy of subsequent measurements and improving the system's measurement precision. Attached Figure Description

[0053] Figure 1 This is a schematic diagram (half-section) of the structure of the mass flow rate and volumetric flow rate measuring device in one embodiment;

[0054] Figure 2 This is a process and instrumentation control diagram of a mass flow rate and volumetric flow rate measurement device in one embodiment;

[0055] Figure label:

[0056] 1-Input port; 2-Flow direction switching valve; 3-Gas phase pressure transmitter; 4-First check valve; 5-Input switch valve; 6-Gas source input port; 7-Sealing end plate; 8-Bolt; 9-Sealing gasket; 10-First bearing; 11-First bracket; 12-First weight sensor; 13-Second weight sensor; 14-Second bracket; 15-Second bearing; 16-Motor; 17-Measuring container; 18-Sealed container; 19-Second check valve; 20-Liquid phase pressure transmitter; 21-Output regulating valve; 22-Output outlet. Detailed Implementation

[0057] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0058] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0059] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0060] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element, or there may be an intermediate element present. Moreover, in this application, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element, or "connected" to the other element via a third element.

[0061] Example 1

[0062] Please refer to Figure 1 , Figure 2 One embodiment provides a mass flow rate and volumetric flow rate measuring device, including: a sealed container 18, a measuring container 17, a medium input channel, a medium output channel, a timing element, and a discharge mechanism; wherein, the volume of the measuring container 17 is known and is disposed in the sealed container 18; the measuring container 17 has an opening for receiving the medium to be measured poured / input into it; the medium input channel is connected to the sealed container 18; the medium input channel controls the medium to be measured to flow into the measuring container 17 via a first branch or into the sealed container 18 via a second branch through the opening via a flow direction switching valve 2; the medium output channel is connected to the bottom of the sealed container 18; the timing element is used to measure the time taken for the measuring container to be filled with the medium to be measured, preferably, the timing element is used to measure the time taken for the measuring container 17 to go from an empty state to a state full of the medium to be measured (this preferred solution is more convenient and direct); the discharge mechanism is used to empty the medium to be measured from the measuring container 17.

[0063] In one embodiment, the discharge mechanism is configured as a tilting actuator that tilts the measuring container 17 and pours out the medium to be measured inside the measuring container 17; the tilting actuator is fixed inside the sealed container 18.

[0064] Regarding the tilting actuator, in one embodiment, the tilting actuator has the following structure: a support rod is fixed on both opposite sides of the measuring container 17; a bracket connects to the free end of the support rod and forms a rotational fit; the bracket is used to support the measuring container 17; a motor 16 is drivenly connected to the end of the support rod; the motor 16 is used to rotate the support rod to tilt the measuring container 17. The bracket engages with the support rod, therefore there are two brackets: a first bracket 11 and a second bracket 14; a first bearing 10 is provided at the connection between the first bracket 11 and the first support rod, and a second bearing 15 is provided at the connection between the second bracket 14 and the second support rod.

[0065] The above describes the method of discharging the test medium from the measuring container 17 by tilting it. Alternatively, a discharge port can be provided on the measuring container 17, and a valve or switch (such as a solenoid valve) can be installed to discharge the test medium from the measuring container 17 by opening the valve or switch. Furthermore, the discharge port can be located at the bottom of the measuring container 17 to completely drain the test medium. When the valve or switch is closed, the measuring container 17 can be refilled with the test medium for the next measurement.

[0066] In one embodiment, the sealed container 18 is configured as a pressure-resistant sealed shell and formed into a container structure; the top of the pressure-resistant sealed shell is connected to a gas source input channel, and an input switch valve 5 is connected to the gas source input channel. The gas source is preferably air or nitrogen. Correspondingly, a gas phase pressure transmitter 3 is connected to the upper section of the sealed container 18, and a liquid phase pressure transmitter 20 is connected to the lower section of the sealed container 18.

[0067] In one embodiment, the mass flow rate and volumetric flow rate measuring device further includes a weight sensor for measuring the mass of the medium to be measured in the measuring container 17; two weight sensors are provided, namely a first weight sensor 12 and a second weight sensor 13, with one weight sensor installed below each of the tilting actuators. That is, the weight sensor supports both the measuring container 17 and the discharge mechanism. The overall weight can be detected, and by subtracting the weights of the medium to be measured from its weights in two states during filling, the weight of the medium filled between the two states can be calculated.

[0068] This mass flow rate and volumetric flow rate measuring device has the following advantages:

[0069] 1. The measuring element (such as measuring container 17, weight sensor) and the main measuring process are placed in a closed pressurized environment (closed container 18). The liquid after measurement or the liquid in the measurement gap can be output under pressure without the need for additional pump-type conveying equipment.

[0070] 2. By using components and design methods such as check valves, U-shaped liquid seal structures, and output regulating valves 21, the inlet and outlet of the sealed container 18 can ensure that the gas in the pressurized sealed element (i.e., the sealed container 18) will not mix into the pipeline, thus ensuring the stability of pipeline transportation and the stability of upstream and downstream devices.

[0071] 3. The design of the flip-out / rotatable measuring container 17 allows for the complete discharge of liquids and solids from the measuring container 17 after a measurement, ensuring the accuracy of the next measurement and improving the system's measurement precision.

[0072] 4. Compared with mature flow meter products, this device and its related measurement method are not limited by objective conditions such as pipeline fluid distribution and the accuracy of measurement element installation, which can fully guarantee the accuracy of measurement data;

[0073] 5. The device and the measurement method involved can measure the volumetric flow rate, mass flow rate and density of pure liquid fluid in one operation, and can also measure the liquid phase volumetric flow rate, liquid phase mass flow rate, liquid phase mass percentage, solid phase volumetric flow rate, solid phase mass flow rate and solid phase mass percentage of solid-liquid two-phase fluid in one operation.

[0074] 6. The materials used to manufacture the measuring elements of the device are not limited; metal materials, polymer materials, ceramic materials, and natural materials can also be used, resulting in low material costs.

[0075] 7. The test medium is not limited by corrosivity, temperature, conductivity, acidity or alkalinity, etc. This device can measure any liquid or solid-liquid mixture fluid.

[0076] Example 2

[0077] Please refer to Figure 1 , Figure 2 One embodiment provides a mass flow rate and volumetric flow rate measuring device, which can measure the mass flow rate and volumetric flow rate of a pure liquid phase fluid, as well as the combined mass flow rate and combined volumetric flow rate of a solid-liquid mixed phase fluid, and can also measure the mass percentage of solid, liquid and liquid phases in a solid-liquid mixed phase fluid.

[0078] The specific structure of this mass flow rate and volumetric flow rate measuring device is as follows, with the liquid being measured as the medium being explained.

[0079] A measuring container 17 of known volume is placed inside a pressure-resistant sealed housing (i.e., a sealed container 18). The measuring container 17 is preferably a measuring cylinder. One side of the measuring cylinder is connected to a motor 16. The measuring cylinder is connected to a first support 11 via a first bearing 10 and to a second support 14 via a second bearing 15. The measuring cylinder, support, and motor 16 are respectively mounted on a weight sensor. The weight sensor consists of a first weight sensor 12 and a second weight sensor 13. Detachable sections are made on both sides of the weight sensor using sealing end plates 7, sealing gaskets 9, and bolts 8. These detachable sections connect to the sealed container 18 and are used for maintenance of its internal components. A gas phase pressure transmitter 3 for measuring gas phase pressure is installed at the top of the pressure-resistant sealed housing, and a liquid phase pressure transmitter 20 for measuring liquid phase pressure is installed at the bottom of the pressure-resistant sealed housing.

[0080] When the liquid to be tested is input through the medium input channel (with medium input port 1), two pipelines (i.e., the first branch and the second branch) are set up to enter the pressure-resistant sealed housing from the top and middle of the housing, respectively. Each pipeline is equipped with a flow direction switching valve 2. The top inlet pipeline is additionally equipped with a first check valve 4. An outlet is set at the bottom of the pressure-resistant sealed housing, which is connected to an outlet pipeline (i.e., the medium output channel, with an output outlet 22). A second check valve 19 and an output regulating valve 21 are installed on the pipeline. A high-pressure air / nitrogen pipeline (i.e., the gas source input channel, with a gas source input port 6) is installed at the top of the pressure-resistant sealed housing, and an input switch valve 5 is installed on the pipeline.

[0081] The key technical points include:

[0082] 1. The main measuring elements and the measuring process are all installed in a sealed enclosure, and compressed air or nitrogen is used to create pressure inside the sealed enclosure, which is used as the power source for the continued delivery of liquid after measurement;

[0083] 2. The measuring cylinder, bracket, motor 16, bearing and other components are integrated and installed together on the weight sensor. By measuring the change in weight, subsequent calculations of parameters such as mass flow rate can be performed.

[0084] 3. Each time the measuring cylinder is filled from empty to full, it constitutes one measurement cycle. The length of the measurement cycle can be shortened by reducing the size of the measuring cylinder. When the measurement cycle is short enough, the average flow rate of the measurement cycle can be regarded as the instantaneous flow rate in an engineering sense.

[0085] 4. Each time the measuring cylinder is filled, the gravity sensor determines that the cylinder is full. Once the cylinder is full, the motor 16 is controlled to rotate 180 degrees to pour out the liquid by gravity. After a delay, the cylinder is rotated 180 degrees again to reset the measuring cylinder and prepare for the next measurement. This method allows a single set of measuring elements to complete the continuous measurement process.

[0086] 5. By using components and design methods such as one-way valves, U-shaped liquid seal structures (set on the first branch and the medium output channel), and output regulating valve 21, the measuring element can ensure that the gas in the pressurized sealed element will not mix into the pipeline, thus ensuring the stability of pipeline transportation and the stability of upstream and downstream devices.

[0087] Example 3

[0088] One embodiment provides a method for measuring mass flow rate and volumetric flow rate, employing any of the mass flow rate and volumetric flow rate measuring devices described in the above embodiments; the method includes the following steps:

[0089] S0. The gas source input channel is based on the gas phase pressure transmitter 3, which controls the gas source to fill the sealed container 18 and maintain the set pressure value.

[0090] S1. The medium input channel injects the medium to be tested into the sealed container 18 through the first branch, and the medium output channel is adjusted to keep the liquid level in the sealed container 18 at a constant height.

[0091] S2. The medium input channel injects the medium to be tested into the measuring container 17 through the second branch. Before injecting the medium to be tested, the measuring container 17 should drain all the previously retained medium to be tested.

[0092] S3. After the measuring container 17 is filled, the flow direction switching valve 2 switches the flow of the test medium into the sealed container 18. At the same time, the timing element measures the time t taken for the measuring container 17 to go from an empty state to a state full of the test medium. The gravity sensor records the value and the change of the value in real time. When the value no longer changes significantly, the measuring container 17 is considered to be full. If the density of the test medium is known, the weight of the filled test medium can be calculated. In addition, the weight of the measuring container 17 itself and the weight when it is full can be measured by a weight sensor, and the weight of the filled test medium can be calculated by difference.

[0093] S4. The discharge mechanism empties the test medium from the measuring container 17;

[0094] S5. Calculate the volumetric flow rate Q of the solid phase in the medium to be measured. 固 Mass flow rate F 固 and mass percentage P 固 One or more data in, and / or,

[0095] Calculate the volumetric flow rate Q of the liquid phase in the medium to be measured. 液 Mass flow rate F 液 Percentage of mass (P) 液 One or more data in the data;

[0096] The calculation formula is as follows:

[0097]

[0098]

[0099]

[0100] P 液 =1-P 固 (7)

[0101]

[0102]

[0103] Wherein, the solid density is ρ 固 (Given) The density of the liquid is ρ 液 (Given) The volume of measuring container 17 is V, the weight of measuring container 17 is m1, and the total weight of measuring container 17 when it is filled with the liquid to be measured is m2.

[0104] In one embodiment, step S1, adjusting the medium output channel to maintain a constant liquid level in the sealed container 18, includes the following steps: measuring the liquid level in the sealed container 18 by the difference between the gas phase pressure transmitter 3 and the liquid phase pressure transmitter 20, and adjusting the flow size of the medium output channel to maintain a constant liquid level.

[0105] The basic principle of this method for measuring mass flow rate and volumetric flow rate is:

[0106] 1. Principle of volumetric flow rate measurement for liquid or solid-liquid mixed phase fluids:

[0107] The volume change is the integral of the real-time volumetric flow rate with time. The volumetric flow rate is the quotient of the volume change divided by time. Therefore, by using a measuring container 17 with a known volume and measuring the time difference from empty to full, the average volumetric flow rate can be calculated. When the time is short, it can be approximated as the instantaneous volumetric flow rate.

[0108] Given that the volume of measuring container 17 is V, and the time it takes for measuring container 17 to go from empty to full is t, then the average flow rate (instantaneous flow rate) Q:

[0109] Q = V / t (1)

[0110] 2. Principle of mass flow rate measurement for liquid or solid-liquid mixed phase fluids:

[0111] Similarly, the change in mass is the integral of real-time mass flow rate with time. The mass flow rate is the quotient of the change in mass divided by time. Therefore, by measuring the length of a certain time period and the change in the mass of the container, the average mass flow rate can be calculated. When the time period is short, it can be approximated as the instantaneous mass flow rate.

[0112] Given that the initial mass of the measuring container 17 is m1, the time duration is t, and the mass after time t from the initial moment is m2, then the average mass flow rate (instantaneous mass flow rate) F:

[0113] F=(m2-m1) / t (2)

[0114] 3. Principle of density measurement for liquid or solid-liquid mixtures:

[0115] Based on the measurement principles 1 and 2 above, the average density of the fluid can be obtained by dividing the mass flow rate by the volume flow rate over the same time period. When the time length is short, it can be approximated as the instantaneous fluid density.

[0116] Using equations (1) and (2) above, the average density (instantaneous density) ρ is:

[0117] ρ=F / Q (3)

[0118] 4. Principle of solid phase mass ratio measurement in solid-liquid mixed-phase fluids:

[0119] Given that the density of the solid is ρ 固 Given that the density of the liquid is ρ 液 The volume of the measuring container is V, the mass of the measuring container 17 when empty is m1, the mass of the measuring container 17 when full is m2, and the time it takes for the measuring container 17 to go from empty to full is t. Then, the volumetric flow rate Q of the liquid phase is... 液 Mass flow rate F 液 Percentage of mass (P) 液 Equivalent volumetric flow rate Q of the solid phase 固 Mass flow rate F 固 Percentage of mass (P) 固 They are as follows:

[0120]

[0121]

[0122]

[0123] P 液 =1-P 固 (7)

[0124]

[0125]

[0126] Example 4

[0127] Please refer to Figure 1 , Figure 2One embodiment provides a method for measuring mass flow rate and volumetric flow rate, including the following steps:

[0128] 1. Before the measurement begins, the measuring cylinder (i.e., measuring container 17) is completely emptied, and the motor 16 controls the measuring cylinder to be fully upward;

[0129] 2. By interlocking the air / nitrogen input pipeline input switch valve 5 with the gas phase pressure transmitter 3 at the top of the pressure-resistant sealed housing (i.e., sealed container 18), the air or nitrogen is controlled to fill the pressure-resistant sealed housing and maintain the set pressure value.

[0130] 3. The liquid to be tested is introduced into the liquid tank at the bottom of the pressure-resistant sealed housing through the inlet in the middle of the housing;

[0131] 4. The liquid level in the bottom liquid tank of the pressure-resistant sealed housing is measured by the difference between the gas phase pressure transmitter 3 and the liquid phase pressure transmitter 20, and the liquid level is kept constant by interlocking the opening and closing of the output regulating valve 21.

[0132] 5. After the measurement begins, the liquid is introduced into the measuring cylinder from the top inlet of the pressure-resistant sealed housing through the flow switching valve 2;

[0133] 6. Record the values ​​and rate of change of the gravity sensor in real time;

[0134] 7. When the gravity sensor value no longer changes significantly, it is determined that the measuring cylinder is full. Immediately switch the flow direction switching valve 2 to continue inputting the liquid to be measured from the inlet in the middle of the pressure-resistant sealed shell;

[0135] 8. The measurement calculation can be completed by measuring the weight change value of the weight sensor, the time length of the weight change, the volume of the measuring cylinder, the liquid phase density, the solid phase density, etc., as measured in step 6. See section S5 in Example 3 for details.

[0136] 9. After the calculation is completed, control motor 16 to drive the measuring cylinder to rotate 180 degrees, pour out the liquid in the measuring cylinder, and after a certain delay, rotate it 180 degrees again.

[0137] 10. Repeating steps 5-9 will allow you to complete the measurement work continuously.

[0138] Example 5

[0139] Based on the technical solutions in the above embodiments, one embodiment provides a method for measuring mass flow rate and volumetric flow rate, characterized by including the following steps:

[0140] S1. The timing element measures the time t from the first state to the second state when the measuring container is filled with the medium to be tested, and the weight sensor measures the weight of the measuring container in the first state as m1 and the weight of the measuring container in the second state as m2. In the second state, the measuring container is filled with the medium to be tested, and m2 is the total weight of the measuring container and the medium to be tested. After the timing element and the weight sensor have completed their measurements, the measuring container discharges the medium to be tested.

[0141] S2. Calculate the volumetric flow rate Q of the solid phase in the medium to be measured. 固 Mass flow rate F 固 and mass percentage P 固 One or more data in, and / or,

[0142] Calculate the volumetric flow rate Q of the liquid phase in the medium to be measured. 液 Mass flow rate F 液 Percentage of mass (P) 液 One or more data in the data;

[0143] The calculation formula is as follows:

[0144]

[0145]

[0146]

[0147] P 液 =1-P 固 (7)

[0148]

[0149]

[0150] Wherein, the solid density is ρ 固 (Given) The density of the liquid is ρ 液 (Given) The volume of the container being measured is V.

[0151] The above technical solution, as can be understood, allows for the calculation of the weight of the test medium poured between the two states by subtracting the weights of the test medium during filling; this is crucial. In one embodiment, the first state measures the weight of the container without the test medium, i.e., the weight of the container itself; the second state measures the total weight of the container filled with the test medium.

[0152] In one embodiment, the timing element, measuring container, weight sensor, and main measurement process are placed in a closed pressurized environment (closed container). The liquid after measurement or the liquid in the measurement gap can be output under pressure without the need for additional pump-type delivery equipment.

[0153] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for measuring mass flow rate and volumetric flow rate, characterized in that, A device for measuring mass flow rate and volumetric flow rate, the measuring device comprising: Sealed container; A measuring container is disposed within the sealed container; the measuring container has an opening. A medium input channel is connected to the sealed container; the medium input channel controls the flow direction switching valve to allow the medium to be measured to flow into the sealed container via the first branch, or into the measuring container via the second branch through the opening. A medium output channel is connected to the bottom of the sealed container; A timing element for measuring the time taken for the measuring container to be filled with the test medium; and A discharge mechanism is used to empty the test medium from the measuring container; The measurement method includes the following steps: S1. The medium input channel injects the medium to be tested into the sealed container through the first branch, and the medium output channel is adjusted to keep the liquid level in the sealed container at a constant height. S2. The medium input channel injects the test medium into the measuring container through the second branch. Before injecting the test medium, the measuring container should drain all the previously retained test medium. S3. After the measuring container is filled, the flow direction switching valve switches the flow of the medium to be measured into the sealed container; at the same time, the timing element measures the time t taken for the measuring container to go from an empty state to a state where the medium to be measured is full. S4. The discharge mechanism empties the test medium from the measuring container; S5. Calculate the volumetric flow rate Q of the solid phase in the medium to be measured. 固 And / or, calculate the volumetric flow rate Q of the liquid phase in the medium to be measured. 液 ; The calculation formula is as follows: （6） （9） Wherein, the solid density is ρ 固 The liquid density is ρ 液 The volume of the measuring container is V, the weight of the measuring container is m1, and the total weight of the measuring container when it is filled with the medium to be measured is m2.

2. The method for measuring mass flow rate and volumetric flow rate according to claim 1, characterized in that, The discharge mechanism of the mass flow rate and volumetric flow rate measuring device is configured as a tilting actuator that tilts the measuring container and pours out the medium to be measured inside the measuring container; the tilting actuator is fixed inside the sealed container.

3. The method for measuring mass flow rate and volumetric flow rate according to claim 2, characterized in that, The dumping actuator includes: Support rods are fixed on opposite sides of the measuring container; A bracket, connecting the free end of the support rod and forming a rotatable fit; the bracket is used to support the measuring container; and A motor is connected to the end of the support rod; the motor is used to rotate the support rod to tilt the measuring container.

4. The method for measuring mass flow rate and volumetric flow rate according to claim 1, characterized in that, The sealed container of the mass flow rate and volume flow rate measuring device is configured as a pressure-resistant sealed shell and formed as a container structure; the top of the pressure-resistant sealed shell is connected to a gas source input channel, and an input switch valve is connected to the gas source input channel.

5. The method for measuring mass flow rate and volumetric flow rate according to claim 4, characterized in that, The upper section of the sealed container of the mass flow rate and volume flow rate measuring device is connected to a gas phase pressure transmitter, and the lower section of the sealed container is connected to a liquid phase pressure transmitter.

6. A method for measuring mass flow rate and volumetric flow rate according to any one of claims 2 or 3, characterized in that, The mass flow rate and volume flow rate measuring device also includes a weight sensor for measuring the mass of the medium to be measured in the measuring container; two weight sensors are provided, one of which is installed below the tilting actuator.

7. The method for measuring mass flow rate and volumetric flow rate according to claim 1, characterized in that, The measurement method further includes the following steps: S0. The gas source input channel is based on a gas phase pressure transmitter, which controls the gas source to fill the sealed container and maintain the set pressure value.

8. The method for measuring mass flow rate and volumetric flow rate according to claim 1, characterized in that, In step S1, adjusting the medium output channel to maintain a constant liquid level in the sealed container includes the following steps: The liquid level in a closed container is measured by the difference between the gas phase pressure transmitter and the liquid phase pressure transmitter, and the flow rate of the interlocking medium output channel is adjusted to maintain a constant liquid level.

9. A method for measuring mass flow rate and volumetric flow rate, characterized in that, A device for measuring mass flow rate and volumetric flow rate, the measuring device comprising: Sealed container; A measuring container is disposed within the sealed container; the measuring container has an opening. A medium input channel is connected to the sealed container; the medium input channel controls the flow direction switching valve to allow the medium to be measured to flow into the sealed container via the first branch, or into the measuring container via the second branch through the opening. A medium output channel is connected to the bottom of the sealed container; A timing element for measuring the time taken for the measuring container to be filled with the test medium; and A discharge mechanism is used to empty the test medium from the measuring container; The measurement method includes the following steps: S1. The timing element measures the time t from the first state to the second state when the measuring container is filled with the medium to be tested, and the weight sensor measures the weight of the measuring container in the first state as m1 and the weight of the measuring container in the second state as m2. The first state is the empty state of the measuring container, and the second state is the measuring container filled with the medium to be tested. m2 is the total weight of the measuring container and the medium to be tested. After the timing element and the weight sensor have completed their measurements, the measuring container discharges the medium to be tested. S2. Calculate the volumetric flow rate Q of the solid phase in the medium to be measured. 固 And / or, calculate the volumetric flow rate Q of the liquid phase in the medium to be measured. 液 ; The calculation formula is as follows: （6） （9） Wherein, the solid density is ρ 固 The liquid density is ρ 液 The volume of the container is measured as V.

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