CN204087549U - Process measurement and control integrated practice system - Google Patents
Process measurement and control integrated practice system Download PDFInfo
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- CN204087549U CN204087549U CN201420468611.4U CN201420468611U CN204087549U CN 204087549 U CN204087549 U CN 204087549U CN 201420468611 U CN201420468611 U CN 201420468611U CN 204087549 U CN204087549 U CN 204087549U
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- 238000005259 measurement Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000012530 fluid Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims description 52
- 230000007306 turnover Effects 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 4
- 238000012549 training Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000523 sample Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 108010015780 Viral Core Proteins Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The utility model provides a kind of process measurement and control integrated practice system.This system comprises: storage tank, for storing hydraulic fluid; Pipeline, for guiding hydraulic fluid to flow out from the outlet of storage tank, and returns the entrance of storage tank; First pump, is arranged on pipeline, is communicated with storage tank, to deliver to pipeline by the hydraulic fluid in storage tank from the outlet pump of storage tank; Multiple valve, is arranged on pipeline; Multiple measurement instrument, for measuring the parameter relevant to hydraulic fluid.The simple parts of this system simulate complicated site work environment, are convenient in teaching, training for student provides the practice opportunity performed close to actual field operation.
Description
Technical field
The present invention relates to the integrated practice system of automation field, particularly process measurement and control integrated practice system.
Background technology
Measuring instrument is installed to install with maintenance, Controlling Apparatus for Processes and device and debug with maintenance, Process Control System and the Major Core Competence that automatic technology class post should possess is engaged in maintenance.A lot of universities and colleges have all offered relevant speciality and correlated curriculum at present, but most of universities and colleges course teaching also rests on the pattern that traditional theory adds experiment, and the device of Training Room can only be used for demonstration and realize some simple operations tasks, disconnects completely with production scene.Its main cause is do not have a set of close on-the-spot actual integrated practice system being convenient to students practise operation.
In the actual field of automated job, often have multiple equipment to hydraulic fluid, such as water, processes.Liquid flows in pipeline, enters a field apparatus, through process, from wherein flowing out, and enters next field apparatus.In some systems, liquid is cycle operation, and in other systems, and liquid from liquid source drawing-in system, after field apparatus process one by one, is leaving system through Flows through pipeline.
In such automated job process, need to control the flowing of liquid, also need the parameters such as the liquid level of liquid in the temperature to liquid, pressure, flow and field apparatus to measure.And for such control and measurement operation, have many requirements, requirement of particularly keeping the safety in production.
So, in operation practice, having very high requirement to the practical operation experience of associative operation personnel on the one hand, in teaching, training, proposing strict restriction to carrying out practical teaching by actual field system again on the other hand.
Therefore, need a kind of integrated practice system, it can for student provides the practice opportunity performed close to actual field operation in teaching, training.
Summary of the invention
A technical matters to be solved by this invention is to provide a kind of process measurement and control integrated practice system, and it can simulated field operating environment, so that for student provides the practice opportunity performed close to actual field operation in teaching, training.
According to an aspect of the present invention, providing a kind of process measurement and control integrated practice system, comprising: storage tank, for storing hydraulic fluid; Pipeline, for guiding hydraulic fluid to flow out from the outlet of storage tank, and returns the entrance of storage tank; First pump, is arranged on pipeline, is communicated with storage tank, to deliver to pipeline by the hydraulic fluid in storage tank from the outlet pump of storage tank; Multiple valve, is arranged on pipeline; Multiple measurement instrument, for measuring the parameter relevant to hydraulic fluid.
Preferably, this system can also comprise: the first work tank, and its entrance is communicated to the main line of pipeline, and its outlet is to the entrance of storage tank, and its exit position is higher than the entry position of storage tank.
Preferably, this system can also comprise: the second work tank and the second pump, the entry position of the second work tank is lower than the exit position of the first work tank, and the exit position of the second work tank is lower than the entry position of storage tank, the outlet of the second work tank is communicated to the entrance of work tank through the second pump, the entrance of the second work tank is communicated to the outlet of the first work tank and the main line of pipeline.
Preferably, measurement instrument comprises multiple liquid level gauge, is separately positioned on storage tank, the first work tank or the second work tank, is respectively used to measure the working liquid volume in storage tank, the first work tank or the second work tank.
Preferably, multiple liquid level gauge comprises: at least one in differential pressure type level detector, magnetic turnover plate type liquid level gauge, floating ball type liquid-level meter, ultrasonic level gage.
Preferably, measurement instrument comprises the first pump pressure detector and the second pump pressure detector, is separately positioned on the first pump and the second delivery side of pump place on pipeline.
Preferably, pipeline comprises the branch road of main line and two or more parallel connections; Measurement instrument comprises multiple flowmeter, is separately positioned on main line and branch road.
Preferably, flowmeter comprises a differential pressure flowmeter, an electromagnetic flowmeter and a vortex shedding flow meter.
Preferably, measurement instrument comprises and is arranged on thermal resistance on pipeline and/or thermopair.
Preferably, pipeline comprises the branch road of main line and two or more parallel connections; Multiple valve comprises an electric control valve and a pneumatic control valve, is separately positioned on two branch roads.
The simple parts of process measurement and control integrated practice system according to the present invention simulate complicated site work environment, are convenient in teaching, training for student provides the practice opportunity performed close to actual field operation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the process measurement and control integrated practice system according to a concrete example of the present invention.
Description of reference numerals
TK01 water tank
TK02 first work tank
TK03 second work tank
LIC01 first work tank differential pressure type level measuring instrument
LIC02 second work tank differential pressure type level measuring instrument
LI01 water tank magnetic turnover plate type liquid level gauge
LI02 second work tank magnetic turnover plate type liquid level gauge
LI03 water tank floating ball type liquid-level meter
LI04 first work tank ultrasonic level gage
FI01 electromagnetic flowmeter
FI02 vortex shedding flow meter
FI03 differential pressure flowmeter
TI01 thermal resistance
TI02 thermopair
P01 first pump
P02 second pump
PI01 first pump discharge pressure measuring instrument
PI02 second pump discharge pressure measuring instrument
CV01 electric control valve
CV02 pneumatic control valve
V01 ~ V12 hand valve
Embodiment
Below with reference to the accompanying drawings describe in detail according to process measurement and control integrated practice system of the present invention.
Fig. 1 is the schematic diagram of the process measurement and control integrated practice system according to a concrete example of the present invention.
In process measurement and control integrated practice system according to the present invention, provide storage tank TK01, wherein store hydraulic fluid, such as, can use water as hydraulic fluid.Storage tank TK01 can be used for simulating various field apparatus.
Pipeline guides hydraulic fluid to flow out from the outlet of storage tank TK01, and returns the entrance of storage tank TK01, to return storage tank TK01.For the ease of inflow and the outflow of liquid in tank, in storage tank TK01 (and the first work tank TK02, second work tank TK03 of hereinafter will describing), entrance can be arranged on tank top, and outlet is arranged on pot bottom.
Pipeline arranges the first pump P01, is communicated with storage tank TK01, the outlet pump of the hydraulic fluid in storage tank TK01 from storage tank TK01 is delivered to pipeline.
Thus, hydraulic fluid running environment is simulated.Neither relate to the inner structure of various field apparatus complexity, the circulation of hydraulic fluid at the scene between equipment and pipeline can be embodied again, thus can guarantee to provide under safe prerequisite more close to on-the-spot practical training environment.
Pipeline is provided with multiple valve (hand valve V01 ~ V12, electric control valve CV01, pneumatic control valve CV02).By controlling these valves, can the break-make of hydraulic fluid and flow in pilot piping, realize the simulation to process control.
In addition, be also provided with multiple measurement instrument, for measuring the parameter relevant to hydraulic fluid.Each measurement instrument can will measure which parameter according to it and its measuring principle arranges corresponding position in systems in which.
In addition, in order to simulate liquid flow between various equipment and cooperation, can also provide the first work tank TK02, its entrance is communicated to the main line of pipeline, and its outlet is to the entrance of storage tank TK01.
The exit position of the first work tank TK02 is higher than the entry position of storage tank TK01.Like this, when the valve V08 between the outlet and storage tank TK01 of the first work tank TK02 opens, the liquid in the first work tank TK02 can automatically flow in storage tank TK01 and not need pumping.
On the other hand, between each equipment, need to be realized by pumping the situation of liquid flow to simulate, the second work tank TK03 and the second pump P02 can also be provided in system.The entry position of the second work tank TK03 is lower than the exit position of the first work tank TK02, and the exit position of the second work tank TK03 is lower than the entry position of storage tank TK01.
The outlet of the second work tank TK03 is communicated to the entrance of work tank through the second pump P02.
The entrance of the second work tank TK03 is communicated to the outlet of the first work tank TK02 and the main line of pipeline.
Like this, when the valve V09 between the outlet and the entrance of the second work tank TK03 of the first work tank TK02 opens, the liquid in the first work tank TK02 automatically can flow in the second work tank TK03 and not need pumping.And valve V10, the V11 between the outlet and the entrance of storage tank TK01 of the second work tank TK03 is when opening, the liquid in the second work tank TK03 then needs to be pumped in storage tank TK01 further by the second pump P02.
At the entrance and exit place (and between two tanks) of storage tank TK01, the first work tank TK02, the second work tank TK03 (can be referred to as " tank "), hand valve (V06 ~ V12) can be set respectively, to control the flowing of liquid between each tank.
Pipeline can comprise main line and several branch roads.Several branch roads converge to main line.Can hand valve (V01 ~ V05) be set respectively on main line and branch road, thus controls the break-make of liquid in pipeline and flow.
Except hand valve V01 ~ V05, can also other dissimilar valve be set on different branch roads.Such as electric control valve CV01 can be set on a branch road, and pneumatic control valve CV02 is set on another branch road.Thus, the practice to various valve can be provided in systems in which, and by using these valves to the control of flow, coordinate respective streams gauge (vide infra), can flow measurement practice be carried out.
Described above is system basic comprising.The various measurement instruments that can arrange in systems in which are described below.
1. liquid level
Storage tank TK01, the first work tank TK02 and the second work tank TK03 can arrange liquid level gauge respectively, be respectively used to measure the working liquid volume in storage tank TK01, the first work tank TK02 or the second work tank TK03.
Such as, magnetic turnover plate type liquid level gauge LI01 and floating ball type liquid-level meter LI03 can be set for storage tank TK01.Can be that the first work tank TK02 arranges differential pressure type level measuring instrument LIC01 and ultrasonic level gage LI04.Can be that the second work tank TK03 arranges magnetic turnover plate type liquid level gauge LI02 and differential pressure type level measuring instrument LIC02.
The principle of work of magnetic flap level gauge, ultrasonic level gage, differential pressure type level gauge is as follows.
Magnetic flap level gauge: the cavity holding ball float forms a linker by flange and tank; Ball float in cavity can be elevated along with the lifting of liquid level in container.Filled a turned column display in the outside of cavity, the intersection sinking to liquid and emersion part at ball float when manufacturing ball float has installed magnet steel, and when it and ball float are with liquid surface lifting, its magnetic passes to turned column display through shell, and promotion magnetic column overturns 180 °; Because magnetic column is the right cylinder having red, white two semicolumns synthesis, so change color towards the meeting outside turned column display after upset 180 °, namely dichromatism intersection is the height of liquid level.
Ultrasonic level gage: the probe of ultrasonic level gage is arranged on the top of tested liquid, probe is by after electric excitation, and by air to the liquid propellant ultrasound wave under it, ultrasound wave will by reflection liquid, and echo is popped one's head in and received and monitoring, and is converted into electric signal.Ultrasound wave required between transmit and receive time be and distance between probe and liquid surface proportional.
Differential pressure type level gauge: liquid level transducer of differential pressure type is arranged on the bottom of liquid container, by gauge pressure signal reflection liquid level.
2. pressure
On pipeline, the first pump pressure detector PI01 and the second pump pressure detector PI02 can be set respectively in the exit of the first pump P01 and the second pump P02, be respectively used to the top hole pressure of measurement first pump P01 and the second pump P02.
Tensimeter can select Bourdon tube pressure gauge, and pressure causes bourdon tube to be out of shape, and driving pointer display actual pressure, such as, can precision prescribed grade be 1.0.
3. flow
Multiple flowmeter can be set respectively on the main line of pipeline and branch road.
Such as, can differential pressure flowmeter FI03 be set on main line.On a branch road, such as, on the branch road being provided with electric control valve, electromagnetic flowmeter FI01 can be set.On another branch road, such as, vortex shedding flow meter FI02 can be set on the branch road being provided with pneumatic control valve.
The principle of work of vortex shedding flow meter, electromagnetic flowmeter, differential pressure flowmeter is as follows.
Vortex shedding flow meter: triangle cylindricality swirl generating body is set in intelligent vortex shedding flowmeter fluid, regular vortex is alternately produced when fluid flows through swirl generating body both sides, in the reynolds number range of regulation, the occurrence frequency of vortex is directly proportional to flow velocity, and the probe be placed on rear side of triangular prism can detect that thus the occurrence frequency of vortex can calculate the flow of fluid.
Electromagnetic flowmeter: conductive liquid moves in magnetic field, produce induced potential, its value and flow are directly proportional.
Differential pressure flowmeter: when there being the fluid being full of pipeline to flow through pipeline internal segment stream part, a fluid stream of differential pressure flowmeter will form local contraction at throttling element place.Flow velocity increases, and static pressure reduces, before and after the throttling element of differential pressure flowmeter, just create pressure reduction, and fluid flow is larger, and the pressure reduction of generation is larger, thus can carry out the size of measuring flow according to pressure reduction.
In addition, additionally can provide digitial controller, adopt WP digitial controller and computing machine to control, select PID control law.
In addition, native system can also use frequency converter further, with control pump rotating speed, changes pipeline flow.
4. temperature
Thermal resistance TI01 and/or thermopair TI02 can be set on pipeline (in figure for main line), be used for the temperature of the liquid measured in pipeline.
Thus, the control and measurement in liquid level, pressure, flow, temperature etc. four can be carried out in this integrated practice system.
Below, simply describe according to the process measurement and control integrated practice systematic difference mode of this example.
1. unity loop control strategy
The pressure of two pump outlets, the inlet flow rate of the first work tank TK02 and the second work tank TK03 all belong to unity loop control, also using the liquid level of the first work tank TK02, the second work tank TK03 separately as controlled variable, two single loop tank level control systems can be designed to.
Scene can arrange two controllers in addition and can be used as single-loop controller, and industrial computer also can carry out remote monitoring as single-loop controller.
2. serials control
The liquid level of the first work tank TK02, the second work tank TK03 can be considered to be set to principal parameter and second parameter respectively, and on-the-spot two controllers can respectively as master control and secondary control; Also field controller can be controlled as pair, industrial computer is as master control; Or realize serials control by industrial computer completely, using inlet valve aperture as disturbing signal.
3. Feedforward-feedback control
Can consider only using the first work tank TK02, one of them liquid level controlled variable of the second work tank TK03 as unity loop control, using its inlet flow rate as feed-forward signal.
4. Ratio control
Measure respective ducted fluid flow respectively by FI01, FI02, control topworks CV01, CV02 by ratio controller and realize.
5. speed Control
By to the optimum configurations of frequency converter and programming, realize the gearshift adjustment of the first pump P01 and the second pump P02.
In sum, the simple parts of process measurement and control integrated practice system according to the present invention simulate complicated site work environment, are convenient in teaching, training for student provides the practice opportunity performed close to actual field operation.
So far, the specific embodiment according to process measurement and control integrated practice system of the present invention has been described in detail.But it will be understood by those skilled in the art that and the invention is not restricted to various details described herein, but suitable amendment can be made.Protection scope of the present invention is defined by the appended claims.
Claims (10)
1. a process measurement and control integrated practice system, is characterized in that, comprising:
Storage tank, for storing hydraulic fluid;
Pipeline, for guiding described hydraulic fluid to flow out from the outlet of described storage tank, and returns the entrance of described storage tank;
First pump, is arranged on described pipeline, is communicated with described storage tank, to deliver to described pipeline by the hydraulic fluid in described storage tank from the outlet pump of described storage tank;
Multiple valve, is arranged on described pipeline;
Multiple measurement instrument, for measuring the parameter relevant to described hydraulic fluid.
2. process measurement and control integrated practice system according to claim 1, is characterized in that, also comprise:
First work tank, its entrance is communicated to the main line of described pipeline, and its outlet is to the entrance of described storage tank, and its exit position is higher than the entry position of described storage tank.
3. process measurement and control integrated practice system according to claim 2, is characterized in that, also comprise:
Second work tank and the second pump, the entry position of described second work tank is lower than the exit position of described first work tank, and the exit position of described second work tank is lower than the entry position of described storage tank,
The outlet of described second work tank is communicated to the entrance of described work tank through described second pump,
The entrance of described second work tank is communicated to the outlet of described first work tank and the main line of described pipeline.
4. process measurement and control integrated practice system according to claim 3, is characterized in that,
Described measurement instrument comprises multiple liquid level gauge, is separately positioned on described storage tank, described first work tank or described second work tank, is respectively used to measure the working liquid volume in described storage tank, described first work tank or described second work tank.
5. process measurement and control integrated practice system according to claim 4, is characterized in that, described multiple liquid level gauge comprises: at least one in differential pressure type level detector, magnetic turnover plate type liquid level gauge, floating ball type liquid-level meter, ultrasonic level gage.
6. process measurement and control integrated practice system according to claim 3, is characterized in that,
Described measurement instrument comprises the first pump pressure detector and the second pump pressure detector, is separately positioned on described first pump and described second delivery side of pump place on described pipeline.
7. process measurement and control integrated practice system according to claim 1, is characterized in that,
Described pipeline comprises the branch road of main line and two or more parallel connections;
Described measurement instrument comprises multiple flowmeter, is separately positioned on described main line and described branch road.
8. process measurement and control integrated practice system according to claim 7, is characterized in that,
Described multiple flowmeter comprises a differential pressure flowmeter, an electromagnetic flowmeter and a vortex shedding flow meter.
9. process measurement and control integrated practice system according to claim 1, is characterized in that,
Described measurement instrument comprises and is arranged on thermal resistance on described pipeline and/or thermopair.
10., according to the process measurement and control integrated practice system in claim 1 to 9 described in any one, it is characterized in that,
Described pipeline comprises the branch road of main line and two or more parallel connections;
Described multiple valve comprises an electric control valve and a pneumatic control valve, is separately positioned on two described branch roads.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420468611.4U CN204087549U (en) | 2014-08-19 | 2014-08-19 | Process measurement and control integrated practice system |
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| CN201420468611.4U CN204087549U (en) | 2014-08-19 | 2014-08-19 | Process measurement and control integrated practice system |
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| CN204087549U true CN204087549U (en) | 2015-01-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404036A (en) * | 2016-11-08 | 2017-02-15 | 浙江大学昆山创新中心 | Thermal power station water circulation pipeline instrument test device |
| CN109887398A (en) * | 2019-03-25 | 2019-06-14 | 兰州石化职业技术学院 | A kind of high water tank control instructional device operating method |
-
2014
- 2014-08-19 CN CN201420468611.4U patent/CN204087549U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404036A (en) * | 2016-11-08 | 2017-02-15 | 浙江大学昆山创新中心 | Thermal power station water circulation pipeline instrument test device |
| CN106404036B (en) * | 2016-11-08 | 2019-05-10 | 浙江大学昆山创新中心 | A kind of thermo-power station water circulation pipe instrument experimental rig |
| CN109887398A (en) * | 2019-03-25 | 2019-06-14 | 兰州石化职业技术学院 | A kind of high water tank control instructional device operating method |
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