CN216978006U - Flow testing device - Google Patents
Flow testing device Download PDFInfo
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- CN216978006U CN216978006U CN202123146536.9U CN202123146536U CN216978006U CN 216978006 U CN216978006 U CN 216978006U CN 202123146536 U CN202123146536 U CN 202123146536U CN 216978006 U CN216978006 U CN 216978006U
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- 238000009530 blood pressure measurement Methods 0.000 claims 1
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Abstract
The utility model provides a flow testing device, which is used for measuring the flow of liquid in a pipeline and comprises a controller, a flowmeter, a pressure measuring instrument and an adjusting valve, wherein the flowmeter, the pressure measuring instrument and the adjusting valve are sequentially arranged on the pipeline along the flowing direction of the liquid; the flow meter is in communication connection with the controller and is used for measuring the flow of the liquid; the pressure measuring instrument is in communication connection with the controller and is used for measuring pressure information in the pipeline and sending the pressure information to the controller; the regulating valve is in communication connection with the controller and used for regulating the pressure in the pipeline according to the opening degree of the pressure information regulating valve, so that the pressure in the pipeline is stabilized within a set range. When the pressure measuring instrument measures that the pressure in the pipeline is insufficient, so that more bubbles are contained in the liquid, the controller sends an instruction to the regulating valve to reduce the opening degree of the regulating valve, and then the pressure in the pipeline is regulated, so that the bubbles in the liquid are reduced, and the measuring precision of the flowmeter is prevented from being influenced by the bubbles.
Description
Technical Field
The utility model relates to the technical field of flow measurement, in particular to a flow testing device.
Background
In the fields of polyester chemical industry, water service and the like, a flow meter is generally used for measuring the flow rate of liquid in a pipeline. Although the flowmeter is accurate in measurement, the requirement on the use condition is high, particularly when more bubbles exist in liquid, the flowmeter cannot be accurately measured, the flow measurement value jumps extremely violently, the measurement value loses the reference value, great loss can be caused to industrial production, and even potential safety hazards are generated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a flow rate testing device which can reduce bubbles in liquid in a pipeline and prevent the bubbles from influencing the measurement precision of a flowmeter.
In order to achieve the above object, the present invention provides a flow rate measuring device for measuring a flow rate of a liquid in a pipe, comprising a controller, and a flow meter, a pressure measuring instrument and a regulating valve sequentially arranged on the pipe along a flow direction of the liquid;
the flow meter is in communication connection with the controller and is used for measuring the flow of the liquid;
the pressure measuring instrument is in communication connection with the controller and is used for measuring pressure information in the pipeline and sending the pressure information to the controller;
the regulating valve is in communication connection with the controller and used for regulating the pressure in the pipeline according to the opening degree of the pressure information regulating valve, so that the pressure in the pipeline is stabilized within a set range.
Optionally, the flow rate testing device further includes a variable frequency pump disposed on the pipeline, and the variable frequency pump is disposed in front of the flowmeter and is used for adjusting the flow rate of the liquid in the pipeline.
Optionally, the controller is in communication connection with the variable frequency pump, the flow meter, the pressure measuring instrument and the regulating valve through cables.
Optionally, the controller is in communication connection with the variable frequency pump, the flowmeter, the pressure measuring instrument and the regulating valve through a wireless communication module.
Optionally, the controller, the variable frequency pump and the flow meter form a PID control loop.
Optionally, the controller, the pressure gauge and the regulating valve form a PID control loop.
Optionally, the controller is a PLC.
Optionally, the flow meter is a mass flow meter.
Optionally, the pressure measuring instrument is a pressure transmitter.
Optionally, the regulating valve is a pneumatic regulating valve.
The utility model provides a flow testing device which is used for measuring the flow of a medium in a pipeline, wherein a pressure measuring instrument and a regulating valve are arranged on the pipeline, and a controller is adopted to be in communication connection with the pressure measuring instrument, the regulating valve and a flow meter.
Drawings
It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the utility model and do not constitute any limitation to the scope of the utility model. Wherein:
fig. 1 is a schematic diagram of a flow rate testing apparatus according to an embodiment of the present invention;
in the drawings:
1-a pipeline; 2-a controller; 3-a flow meter; 4-a pressure gauge; 5-adjusting the valve; 6-variable frequency pump.
Detailed Description
To further clarify the objects, advantages and features of the present invention, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
As used in this application, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this disclosure, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. As used in this disclosure, the term "plurality" is generally employed in its sense including "at least one" unless the content clearly dictates otherwise. As used in this disclosure, the term "at least two" is generally employed in a sense including "two or more" unless the content clearly dictates otherwise. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or at least two of the features.
Referring to fig. 1, fig. 1 is a schematic view of a flow rate testing device according to an embodiment of the present invention. The embodiment provides a flow rate testing device, which is used for measuring the flow rate of liquid in a pipeline 1 and comprises a controller 2, and a flowmeter 3, a pressure measuring instrument 4 and a regulating valve 5 which are sequentially arranged on the pipeline 1 along the flow direction of the liquid;
the flowmeter 3 is in communication connection with the controller 2 and is used for measuring the flow rate of the liquid;
the pressure measuring instrument 4 is in communication connection with the controller 2 and is used for measuring pressure information in the pipeline 1 and sending the pressure information to the controller 2;
the regulating valve 5 is in communication connection with the controller 2, and is configured to regulate the pressure in the pipeline 1 according to the opening degree of the valve of the pressure information regulating valve 5, so as to stabilize the pressure in the pipeline 1 within a set range.
When the pressure measuring instrument 4 measures that the pressure in the pipeline 1 is insufficient, so that more air bubbles are contained in the liquid, the controller 2 sends an instruction to the regulating valve 5 to reduce the opening degree of the regulating valve 5, so as to regulate the pressure in the pipeline 1, so that the air bubbles in the liquid are reduced, and the measurement precision of the flowmeter 3 is prevented from being influenced by the air bubbles.
Specifically, in this embodiment, the flow rate testing apparatus further includes a variable frequency pump 6 disposed on the pipeline 1, and the variable frequency pump 6 is disposed in front of the flowmeter 3 and is configured to adjust a flow rate of a medium in the pipeline 1. The variable frequency pump 6 can provide power, and the controller 2 adjusts the frequency of the variable frequency pump 6 to change the flow of liquid in the pipeline 1, so that the controllable accurate measurement of the whole flow testing device is realized.
In this embodiment, the liquid flows through the variable frequency pump 6, the flow meter 3, the pressure measuring instrument 4 and the regulating valve 5 from left to right in sequence.
Preferably, the controller 2, the pressure measuring device 4 and the regulating valve 5 form a PID control loop. When pressure measuring apparatu 4 measures when the not enough pressure in pipeline 1 leads to containing more bubble in the liquid, the accessible controller 2 pressure measuring apparatu 4 with the PID control circuit that governing valve 5 constitutes suitably adjusts the aperture of governing valve 5 improves the pressure in pipeline 1 behind the inverter pump 6 (learn according to the Bernoulli's equation), will effectively reduce the bubble in the liquid when flowing through flowmeter 3, and then reduces the bubble to the interference that flowmeter 3 measured the production, through pressure behind the inverter pump 6 is stabilized in the settlement within range by PID control circuit, can realize flowmeter 3's accurate measurement. In this process, the controller 2 collects the pressure information in the pipe 1 collected by the pressure measuring instrument 4, compares the pressure information with a reference value, and uses the difference to calculate a new input value for stabilizing the pressure in the pipe 1 within a set range. Unlike other simple control operations, the PID control loop can adjust the input value according to historical data and the occurrence of differences, so that the pressure in the pipe 1 is stabilized within a set range, so as to achieve accurate measurement of the flow meter 3.
Further preferably, the controller 2, the variable frequency pump 6 and the flow meter 3 form a PID control loop (negative feedback control loop). The accessible controller 2 the variable frequency pump 6 with the PID control loop that flowmeter 3 constitutes adjusts the frequency of variable frequency pump 6 comes control fluid flow, realizes whole flow test device's controllable accurate measurement, can not because flowmeter 3 measures and does not inaccurate to cause whole test device uncontrollable, avoids producing great loss, causes the potential safety hazard even.
The controller 2 is in communication connection with the variable frequency pump 6, the flowmeter 3, the pressure measuring instrument 4 and the regulating valve 5 through cables.
Or, the controller 2 is in communication connection with the variable frequency pump 6, the flowmeter 3, the pressure measuring instrument 4 and the regulating valve 5 through a wireless communication module. The wireless communication module is, for example, a Bluetooth wireless module, the integration level and the reliability of the Bluetooth wireless module are very high, the transmission rate is usually higher than 1Mbps, the cost is low, the installation is simple, and the wireless communication module is suitable for short-distance wireless communication.
The controller 2 is a PLC. A PLC (programmable logic controller) is a digital operation electronic system designed specifically for use in industrial environments, and employs a programmable memory in which instructions for performing operations such as logic operation, sequence control, timing, counting, and arithmetic operation are stored, and various types of mechanical devices or production processes are controlled by digital or analog input and output. In this embodiment, the PLC includes a central processing unit, a memory, an input unit, an output unit, a power module, and other components, where the central processing unit is used to process and run user programs, perform logic and mathematical operations, and control the whole system to coordinate the system; the memory is used for storing a system program, a user program, logic variables and other information, such as flow information of liquid in the pipeline 1, pressure information in the pipeline 1 and the like; the input unit is connected with the flowmeter 3 and the pressure measuring instrument 4 to receive flow information collected by the flowmeter 3 and pressure information collected by the pressure measuring instrument 4; the output unit is connected with the variable frequency pump 6 and the regulating valve 5 and is used for issuing instructions to control the frequency of the variable frequency pump 6 and the opening degree of the regulating valve 5. The PLC can also be connected with other terminal equipment, such as a computer, a mobile phone and the like, so as to realize remote monitoring and control; and the voltage module power supply is used for converting alternating current into direct current required by the interior of the PLC.
Of course, the controller 2 may also be a single chip microcomputer or other devices for realizing intelligent control, and the application does not limit this.
In this embodiment, the flowmeter 3 is a mass flowmeter, and the mass flowmeter adopts the thermal sensing measurement, thereby how much the molecular mass that takes away through the components of a whole that can function independently molecule measures the flow, because with the thermal sensing measurement, thereby can not influence measuring result because of the change of liquid temperature, pressure, measure accurate reliable, and high-efficient stable.
In this embodiment, the pressure measuring instrument 4 is a pressure transmitter. The pressure transmitter is a device for converting pressure into a pneumatic signal or an electric signal for control and remote transmission, and can convert a physical pressure parameter of liquid sensed by a load cell into a standard electric signal (such as 4-20 mADC) so that the controller 2 can control the opening of the regulating valve 5.
In this embodiment, the regulating valve 5 is a pneumatic regulating valve. The pneumatic regulating valve takes compressed gas as a power source, takes a cylinder as an actuator, drives a valve by means of accessories such as a valve positioner, a converter and the like to realize the adjustment of switching value or proportion, and receives a control signal of the controller 2 to regulate the pressure of liquid in the pipeline 1. The pneumatic control valve has the advantages of simple control, quick reaction, high safety and the like, and is a better choice.
To sum up, the embodiment of the present invention provides a flow rate testing device, configured to measure a flow rate of a medium in a pipeline, where a pressure measuring instrument and a regulating valve are disposed on the pipeline, and a controller is in communication with the pressure measuring instrument, the regulating valve, and the flow meter, where when the pressure measuring instrument measures that the pressure in the pipeline is insufficient, so that a large number of bubbles are contained in a liquid, the controller sends an instruction to the regulating valve to reduce an opening degree of the regulating valve, so as to regulate the pressure in the pipeline, thereby reducing the bubbles in the liquid and preventing the bubbles from affecting a measurement accuracy of the flow meter. In addition, the controller, the pressure measuring instrument and the regulating valve form a PID control loop, and the pressure after the variable frequency pump is stabilized in a set range through the PID control loop, so that the accurate measurement of the flowmeter can be realized. Then through the controller, the variable frequency pump with the PID control loop that the flowmeter constitutes adjusts the frequency of variable frequency pump comes control fluid flow, realizes whole flow test device's controllable accurate measurement, can not because the flowmeter measures inaccurate and causes whole test device uncontrollable, avoids producing great loss, the potential safety hazard even.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. A flow testing device is used for measuring the flow of liquid in a pipeline and is characterized by comprising a controller, a flowmeter, a pressure measuring instrument and a regulating valve, wherein the flowmeter, the pressure measuring instrument and the regulating valve are sequentially arranged on the pipeline along the flowing direction of the liquid;
the flow meter is in communication connection with the controller and is used for measuring the flow of the liquid;
the pressure measuring instrument is in communication connection with the controller and is used for measuring pressure information in the pipeline and sending the pressure information to the controller;
the regulating valve is in communication connection with the controller and used for regulating the pressure in the pipeline according to the opening degree of the pressure information regulating valve, so that the pressure in the pipeline is stabilized within a set range.
2. The flow meter of claim 1, further comprising a variable frequency pump disposed on the pipe, the variable frequency pump disposed before the flow meter and adapted to regulate the flow of liquid in the pipe.
3. The flow testing apparatus of claim 2, wherein the controller is communicatively coupled to the variable frequency pump, the flow meter, the pressure gauge, and the regulator valve via a cable.
4. The flow testing apparatus of claim 2, wherein the controller is communicatively coupled to the variable frequency pump, the flow meter, the pressure gauge, and the regulator valve via a wireless communication module.
5. The flow testing apparatus of claim 2 wherein the controller, the variable frequency pump and the flow meter form a PID control loop.
6. The flow test apparatus of claim 1 wherein the controller, the pressure gauge and the regulator valve form a PID control loop.
7. The flow test apparatus of claim 1 wherein the controller is a PLC.
8. The flow testing apparatus of claim 1, wherein the flow meter is a mass flow meter.
9. The flow testing apparatus of claim 1 wherein the pressure measurement instrument is a pressure transmitter.
10. The flow test apparatus of claim 1 wherein the regulator valve is a pneumatic regulator valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123146536.9U CN216978006U (en) | 2021-12-14 | 2021-12-14 | Flow testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123146536.9U CN216978006U (en) | 2021-12-14 | 2021-12-14 | Flow testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216978006U true CN216978006U (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123146536.9U Active CN216978006U (en) | 2021-12-14 | 2021-12-14 | Flow testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216978006U (en) |
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2021
- 2021-12-14 CN CN202123146536.9U patent/CN216978006U/en active Active
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