CN206920944U - A kind of fluid closed loop flow systems stabilisation - Google Patents

A kind of fluid closed loop flow systems stabilisation Download PDF

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CN206920944U
CN206920944U CN201720737418.XU CN201720737418U CN206920944U CN 206920944 U CN206920944 U CN 206920944U CN 201720737418 U CN201720737418 U CN 201720737418U CN 206920944 U CN206920944 U CN 206920944U
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flow
unit
servomotor
pipeline
fluid
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年介全
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Cedar Environmental Protection Technology (shenzhen) Co Ltd
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Cedar Environmental Protection Technology (shenzhen) Co Ltd
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Abstract

The utility model discloses a kind of fluid closed loop flow systems stabilisation, including electromagnetic flowmeter, flow regulator, servomotor, regulating valve.Electromagnetic flowmeter is connected with flow regulator.Flow regulator is connected with servomotor.Servomotor is connected with regulating valve.Fluid flow in electromagnetic flowmeter detection pipeline, and the data on flows detected is transferred to flow regulator.Data on flows compared with preset value, corresponding instruction is sent to servomotor according to comparative result by flow regulator.Aperture of the servomotor according to instruction adjustment regulating valve, adjust the size of fluid flow in pipeline.The system is measured using electromagnetic flowmeter to the flow of fluids within pipes, and measuring range is big, and high sensitivity；The instruction of flow regulator is received by servomotor, servomotor adjusts regulating valve according to instruction, so as to adjust the flow of fluids within pipes, improves the precision of fluid regulation, suitable for the accurate fluid system of traffic requirement.

Description

A kind of fluid closed loop flow systems stabilisation
Technical field
It the utility model is related to fluid flow control technology field, more particularly to fluid closed loop flow systems stabilisation.
Background technology
Pipeline needs flow control system to regulate and control the flow of the fluid in pipeline often in trandfer fluid.It is existing Fluid closed loop flow systems stabilisation, the size of fluid flow is detected using pressure sensor；Exceed regulation model in fluid flow When enclosing, the flow of fluid is adjusted using electronic regulated valve or air pressure regulator.
However, existing fluid closed loop flow systems stabilisation, has following deficiency：The sensitivity of pressure sensor is not Height, response speed is slow, is only applicable in low velocity fluid system；The degree of regulation of electronic regulated valve or air pressure regulator is low, for The accurate fluid system of traffic requirement is impracticable.
Utility model content
In view of the shortcomings of the prior art, the utility model proposes a kind of closed loop flow systems stabilisation, the fluid closed loop stream Amount systems stabilisation is measured using electromagnetic flowmeter to the flow of fluids within pipes, and it is steady to solve existing fluid closed loop flow Determine the problem of system measurements sensitivity is low, and response speed is slow；The instruction of flow regulator, servomotor are received by servomotor Regulating valve is adjusted according to instruction, so as to adjust the flow of fluids within pipes, solves existing fluid closed loop flow stability series The problem of fluid regulation precision of system is low.
To achieve these goals, technical solutions of the utility model are as follows：
A kind of fluid closed loop flow systems stabilisation, including electromagnetic flowmeter, flow regulator, servomotor, regulating valve.Electricity Magnetic flowmeter is connected with flow regulator.Flow regulator is connected with servomotor.Servomotor is connected with regulating valve. Electromagnetic flowmeter detects the fluid flow in pipeline by the way of electromagnetic induction, and the data on flows detected is transferred into stream Measure adjuster.Flow regulator compared with default threshold value, sends data on flows according to comparative result to servomotor Corresponding instruction.Aperture of the servomotor according to instruction adjustment regulating valve, adjust the size of fluid flow in pipeline.
Further, electromagnetic flowmeter, regulating valve are separately mounted on pipeline.Fluid in pipeline first passes through regulating valve, Again electromagnetic flowmeter is flowed through through piping.
Further, flow regulator includes threshold value storage unit, application condition unit, error calculation unit, standard value Memory cell.The output end of electromagnetic flowmeter is connected with the first input end of application condition unit.Threshold value storage unit and mistake Second input of poor comparing unit is connected.The output end of application condition unit is connected with the control terminal of error calculation unit Connect.The output end of Electromagnetic Flow is also connected with the first input end of error calculation unit.Standard value memory cell and error meter The second input for calculating unit is connected.The output end of error calculation unit is connected with the input of servomotor.Threshold value is deposited Storage unit is used for the minimum threshold and max-thresholds for storing pipeline flow.Standard value memory cell is used for the mark for storing pipeline flow Quasi- value.The data on flows that application condition unit is used to detect electromagnetic flowmeter is carried out with minimum threshold and max-thresholds respectively Compare, and error calculation unit is controlled according to comparative result.Error calculation unit is used for the flow for detecting electromagnetic flowmeter Data carry out seeking difference operation with standard value, obtain the error amount of pipeline flow, and electric to servo according to the error amount of pipeline flow Machine sends corresponding instruction.
Further, electromagnetic flowmeter include magnet exciting coil, Energizing unit, a pair of electrodes, detection unit, amplifying unit, Sampling unit, A/D converting units.The generation direction in the magnetic field of magnet exciting coil is configured as the stream of the fluid with being flowed in pipeline Dynamic direction is perpendicular.Energizing unit provides the exciting current of exchange for the magnet exciting coil.A pair of electrodes in the pipeline with flowing The direction that the flow direction of dynamic fluid and magnet exciting coil produce magnetic field configures in the pipeline with intersecting vertically；The electrode is T-shaped electrode, the T-shaped electrode are made up of T-shaped structure and protection film layer, and the protection film layer will connect liquid level in T-shaped structure All coverings.The electric signal of caused signal electromotive force between the electrode is converted into communication flow letter by detection unit detection Number.Amplifying unit amplifies the communication flow signal of detection unit output.Sampling unit by the amplifying unit to being exaggerated Communication flow signal is sampled, and communication flow signal is converted into direct current flow signal.A/D converting units will adopt from this The direct current flow signal of sample unit output is converted to data signal, and data signal is sent into flow regulator.
Further, the electromagnetic flowmeter also includes noise removing unit.Noise removing unit is arranged on sampling unit Between the A/D converting units, making an uproar included in the direct current flow signal of the A/D converting units is sent to for removing Sound composition.
The beneficial effects of the utility model：
The fluid closed loop flow systems stabilisation is measured using electromagnetic flowmeter to the flow of fluids within pipes, measures model Enclose greatly, and high sensitivity, fast response time；The instruction of flow regulator is received by servomotor, servomotor is according to instruction To adjust regulating valve, so as to adjust the flow of fluids within pipes, the precision of fluid regulation is improved, it is accurate suitable for traffic requirement Fluid system.
Brief description of the drawings
Fig. 1 is circuit block diagram of the present utility model.
Fig. 2 is application schematic diagram of the present utility model.
Fig. 3 is the circuit block diagram of electromagnetic flowmeter 1 in Fig. 1.
Fig. 4 is the circuit block diagram of flow regulator 2 in Fig. 1.
Wherein, Fig. 1 to Fig. 4 reference is：Electromagnetic flowmeter 1, flow regulator 2, servomotor 3, regulating valve 4, Pipeline 5；Magnet exciting coil 11, Energizing unit 12, a pair of electrodes 13, detection unit 14, amplifying unit 15, sampling unit 16, noise Removal unit 17, A/D converting units 18；Threshold value storage unit 21, application condition unit 22, error calculation unit 23, standard value Memory cell 24.
Embodiment
With reference to the accompanying drawings and examples, the utility model is expanded on further.
As shown in figure 1, a kind of fluid closed loop flow systems stabilisation, including electromagnetic flowmeter 1, flow regulator 2, servo electricity Machine 3, regulating valve 4.
Electromagnetic flowmeter 1 is connected with flow regulator 2.Flow regulator 2 is connected with servomotor 3.Servomotor 3 It is connected with regulating valve 4.Regulating valve 4, electromagnetic flowmeter 1 are separately mounted on pipeline 5.Electromagnetic flowmeter 1 uses electromagnetic induction Mode detect fluid flow in pipeline 5, and the data on flows detected is transferred to flow regulator 2.Flow regulator 2 By data on flows compared with preset value, corresponding instruction is sent to servomotor 3 according to comparative result.
Aperture of the servomotor 3 according to instruction adjustment regulating valve 4, the size of fluid flow in pipeline 5 is adjusted, so as to ensure End fluid amount is normal.
As shown in Fig. 2 it is application schematic diagram for the utility model.Arrow V represents the flow direction of fluid in pipeline 5, electricity Magnetic flowmeter 1 is located at the downstream of regulating valve 4, and fluid first passes around pipeline 5 and flows through regulating valve 4, then flows through electromagnetism meter through piping 5 Gauge.
Working media（Fluid）Flow control valve 4 is first passed around, is then detected by electromagnetic flowmeter 1, electromagnetic flowmeter 1 To after actual flow, data on flows is exported data on flows and preset value compared to flow regulator 2, flow regulator 2 Compared with the preset value is the normal work flow of pipeline 5.If the error of the data on flows detected and default threshold value is in permission In the range of, flow regulator 2 thinks that the flow of pipeline 5 is normal, and operating instruction is not sent to servomotor 3；
If the signal that electromagnetic flowmeter 1 detects exceedes normal work flow error scope, flow regulator 2 can be according to mark Quasi- value calculates the error amount of flow, is then sent according to the error amount of flow and instructed accordingly to servomotor 3, servomotor 3 According to the aperture of instruction adjustment regulating valve 4, so as to ensure that end fluid flow is normal.
Electromagnetic flowmeter 1 is the flowmeter that flow measurement is carried out according to Faraday's electromagnetic induction law, and its advantage is crushing Minimum, measurable flow amount scope is big.The ratio of maximum stream flow and minimum discharge is generally 20：More than 1, applicable industrial caliber scope Width, maximum up to 3m, output signal and measured flux are linear, and accuracy is high.
Specifically, as shown in figure 3, flow regulator 2 includes threshold value storage unit 21, application condition unit 22, error meter Calculate unit 23, standard value memory cell 24.
The output end of electromagnetic flowmeter 1 is connected with the first input end of application condition unit 22.Threshold value storage unit 21 It is connected with the second input of application condition unit 22.The output end of application condition unit 22 and the control of error calculation unit 23 End processed is connected.First input end of the output end of Electromagnetic Flow also with error calculation unit 23 is connected.Standard value storage is single Member 24 is connected with the second input of error calculation unit 23.The output end of error calculation unit 23 is defeated with servomotor 3 Enter end to be connected.
Threshold value storage unit 21 stores the minimum threshold and max-thresholds of the flow of pipeline 5.Standard value memory cell 24 stores The standard value of the flow of pipeline 5；Standard value between minimum threshold and max-thresholds, it is preferred that standard value take minimum threshold with most The average value of big threshold value.The data on flows that application condition unit 22 detects electromagnetic flowmeter 1 respectively with minimum threshold with most Big threshold value is compared；If data on flows, between minimum threshold and max-thresholds, application condition unit 22 is not error calculation The control terminal of unit 23 sends signal, and error calculation unit 23 does not send instruction to servomotor 3；If data on flows is beyond minimum Scope between threshold value and max-thresholds, application condition unit 22 send signal to the control terminal of error calculation unit 23.Error The data on flows that computing unit 23 detects electromagnetic flowmeter 1 carries out seeking difference operation with standard value, obtains the mistake of the flow of pipeline 5 Difference；Error calculation unit 23 sends corresponding instruction according to the error amount of the flow of pipeline 5 to servomotor 3.By seeking poor fortune Calculation obtains the positive and negative of error amount, to determine that servomotor 3 is rotated forward or inverted.
Flow error is divided into some scopes by error calculation unit 23；The corresponding servomotor 3 of each error range Different adjusting angles.Which flow error the error amount that error calculation unit 23 obtains the flow of pipeline 5 falls in, error calculation unit 23 just adjusting angles corresponding to selection, and send corresponding instruction, servomotor 3 is adjusted in corresponding angle.
Specifically, as shown in figure 4, electromagnetic flowmeter 1 includes magnet exciting coil 11, Energizing unit 12, a pair of electrodes 13, detection Unit 14, amplifying unit 15, sampling unit 16, A/D converting units 18.
The generation direction in the magnetic field of magnet exciting coil 11 is configured as mutually hanging down with the flow direction of the fluid of flowing in pipeline 5 Directly；
Energizing unit 12 is the exciting current that the magnet exciting coil 11 provides exchange.
Hang down in the direction that a pair of electrodes 13 produces magnetic field with the flow direction of the fluid of flowing in pipeline 5 and magnet exciting coil 11 Directly configure intersectingly in pipeline 5；The electrode is T-shaped electrode, and the T-shaped electrode is made up of T-shaped structure and protection film layer, described Protection film layer all covers the liquid level that connects in T-shaped structure.
Detection unit 14 detects is converted into communication flow letter by the electric signal of caused signal electromotive force between the electrode Number.
Amplifying unit 15 amplifies the communication flow signal of the detection unit 14 output.
Sampling unit 16 by the communication flow signal that the amplifying unit 15 is exaggerated to being sampled, and by communication flow Signal is converted into direct current flow signal.
The direct current flow signal exported from the sampling unit 16 is converted to data signal by A/D converting units 18, and will Data signal is sent to flow regulator 2.
It is preferred that electromagnetic flowmeter 1 also includes noise removing unit 17.Noise removing unit 17 is arranged on sampling unit 16 Between A/D converting units 18, for remove be sent to noise included in the direct current flow signal of A/D converting units 18 into Point.
Above-described is only preferred embodiment of the present utility model, and the utility model is not limited to above example.Can With understand, those skilled in the art directly export or associate on the premise of basic conception of the present utility model is not departed from its It is improved and change is considered as being included within the scope of protection of the utility model.

Claims (5)

  1. A kind of 1. fluid closed loop flow systems stabilisation, it is characterised in that：
    Including electromagnetic flowmeter, flow regulator, servomotor, regulating valve；
    The electromagnetic flowmeter is connected with the flow regulator；
    The flow regulator is connected with the servomotor；
    The servomotor is connected with the regulating valve；
    Fluid flow in the electromagnetic flowmeter detection pipeline, and the data on flows detected is transferred to the Flow-rate adjustment Device；
    The flow regulator compared with default threshold value, sends out the servomotor data on flows according to comparative result Go out corresponding instruction；
    The servomotor adjusts the aperture of the regulating valve according to instruction, adjusts the size of fluid flow in pipeline.
  2. 2. fluid closed loop flow systems stabilisation according to claim 1, it is characterised in that：
    The electromagnetic flowmeter, regulating valve are separately mounted on pipeline；
    Fluid in pipeline first passes through the regulating valve, again passes through the electromagnetic flowmeter.
  3. 3. fluid closed loop flow systems stabilisation according to claim 1, it is characterised in that：
    The flow regulator includes threshold value storage unit, application condition unit, error calculation unit, standard value memory cell；
    The output end of the electromagnetic flowmeter is connected with the first input end of the application condition unit；
    The threshold value storage unit is connected with the second input of the application condition unit；
    The output end of the application condition unit is connected with the control terminal of the error calculation unit；
    First input end of the output end of the Electromagnetic Flow also with the error calculation unit is connected；
    The standard value memory cell is connected with the second input of the error calculation unit；
    The output end of the error calculation unit is connected with the input of the servomotor；
    The threshold value storage unit is used for the minimum threshold and max-thresholds for storing pipeline flow；
    The standard value memory cell is used for the standard value for storing pipeline flow；
    The application condition unit be used for the data on flows that detects the electromagnetic flowmeter respectively with the minimum threshold, most Big threshold value is compared, and controls the error calculation unit according to comparative result；
    The data on flows that the error calculation unit is used to detect the electromagnetic flowmeter carries out asking poor with the standard value Computing, the error amount of pipeline flow is obtained, and corresponding instruction is sent to the servomotor according to the error amount of pipeline flow.
  4. 4. fluid closed loop flow systems stabilisation according to claim 1, it is characterised in that：
    The electromagnetic flowmeter include magnet exciting coil, Energizing unit, a pair of electrodes, detection unit, amplifying unit, sampling unit, A/D converting units；
    The flow direction that the generation direction in the magnetic field of the magnet exciting coil is configured as the fluid with being flowed in pipeline is perpendicular；
    The Energizing unit provides the exciting current of exchange for the magnet exciting coil；
    The flow direction and the magnet exciting coil of the pair of electrode and the fluid flowed in the pipeline produce the side in magnetic field To intersecting vertically configure in the pipeline；The electrode is T-shaped electrode, and the T-shaped electrode is by T-shaped structure and protection film layer group Into the protection film layer all covers the liquid level that connects in T-shaped structure；
    The electric signal of caused signal electromotive force between the electrode is converted into communication flow signal by the detection unit detection；
    The amplifying unit amplifies the communication flow signal of detection unit output；
    The sampling unit by the communication flow signal that the amplifying unit is exaggerated to being sampled, and by communication flow signal It is converted into direct current flow signal；
    The direct current flow signal exported from the sampling unit is converted to data signal by the A/D converting units, and by numeral Signal is sent to flow regulator.
  5. 5. fluid closed loop flow systems stabilisation according to claim 4, it is characterised in that：
    The electromagnetic flowmeter also includes noise removing unit；
    The noise removing unit is arranged between the sampling unit and the A/D converting units, and institute is sent to for removing State the noise contribution included in the direct current flow signal of A/D converting units.
CN201720737418.XU 2017-06-23 2017-06-23 A kind of fluid closed loop flow systems stabilisation Active CN206920944U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720737418.XU CN206920944U (en) 2017-06-23 2017-06-23 A kind of fluid closed loop flow systems stabilisation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720737418.XU CN206920944U (en) 2017-06-23 2017-06-23 A kind of fluid closed loop flow systems stabilisation

Publications (1)

Publication Number Publication Date
CN206920944U true CN206920944U (en) 2018-01-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720737418.XU Active CN206920944U (en) 2017-06-23 2017-06-23 A kind of fluid closed loop flow systems stabilisation

Country Status (1)

Country Link
CN (1) CN206920944U (en)

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