CN103236202A - Integrated experimental device for controlling dynamic process of flow industry - Google Patents
Integrated experimental device for controlling dynamic process of flow industry Download PDFInfo
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- CN103236202A CN103236202A CN2013101453269A CN201310145326A CN103236202A CN 103236202 A CN103236202 A CN 103236202A CN 2013101453269 A CN2013101453269 A CN 2013101453269A CN 201310145326 A CN201310145326 A CN 201310145326A CN 103236202 A CN103236202 A CN 103236202A
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Abstract
The invention discloses an integrated experimental device for controlling a dynamic process of a flow industry, and relates to an experimental control device. The device consists of more than two resistance-capacitance water tanks, and a pipeline-free and valve-free integration mode is used for forming the experimental device for simulating dynamic characteristics of an object. A plurality of control system modes are configured for test. A controlled object of the experimental device is formed by integrating basic units which are resistance-capacitance links without pipelines or valves. The fluidic resistance of a throttling hole is regulated in a threaded seat cover way, and is changed from 0 to infinite to simulate a plurality of linear or nonlinear dynamic characteristics. The water tanks are provided with measurement transmitters respectively, a field indication rotor flow meter, a throttling hole plate, a control valve and a circulation water pump are arranged in four paths of water inlet pipelines respectively, and a pressure meter is arranged at an outlet of the water pump. The device can be used for a process control simulation experiment in flow processes of large chemical production devices, equipment and machines, fluid production devices, equipment and machines and the like, and is applied to the automatic teaching and scientific researches of colleges, scientific research institutions, training institutions, factories and the like as well as teaching.
Description
Technical field
The present invention relates to a kind of experimental provision, particularly relate to a kind of integrated form process industry dynamic process control experimental provision.
Background technology
At present, the controlled device of process control device has plenty of and uses the actual industrial object by its appearance similar, designs simplification, the analogy method of dwindling, as rectification column, neutralization reactor, heat interchanger and electric boiler etc.Its advantage is visual pattern, attractive in appearance beautiful with stainless steel material, with five big parameters (temperature, pressure, flow, liquid level, PH) various control system experiments are named, as if very true, but actual proof is difficult to simulate more all sidedly dynamic perfromances such as various towers, still, stove, cellar for storing things, device and machine in the process industry, and limitation is very big and lack the dirigibility of simulation.Issue table is present: one, supplier does not give the structure technology parameter, the student can not obtain concrete dynamic perfromance with modelling by mechanism, common professional concept, as the limit in the transport function, zero point, non-linear, time constant, gain, controllability and ornamental etc. can not intuitively be found out the implication of these concepts on experimental provision.Its two, this class device price is with high investment big, big energy-consuming, complex structure has tens of manually-operated gates, uses inconvenient.Both making of having is to be medium with water, the capacitance-resistance tank is the experimental provision of elementary cell, but they are to adopt the hand valve to become the discrete constructive method of liquid resistance size, and dynamic perfromance type and the number that can simulate are few, function is few, does not satisfy the needs of multi-level experimental teaching of the new period and scientific research.Its three, the product that supplier provides is a device, only can for one group of student do experiment and floor area big, if there is the laboratory of many covering devices just to seem crowded.At present, both can import-many outputs (MIMO) more, can singly import again-polymorphic type of single output (SISO), organize number more, easy to operate control experimental provision is development trend.
Summary of the invention
The object of the present invention is to provide a kind of integrated form process industry dynamic process control experimental provision.This experimental provision both can constitute single input-list output as required, also can constitute linearity or the non-linear dynamic characteristic of many inputs-many outputs.Be medium with water, with the used material of process industry general character arranged, as required can be accurately, flexibly, easily transposing with adjust.This experimental provision is mixed measure and control instrument, can constitute the various procedures control system, realizes the purpose of experimental study.
The objective of the invention is to be achieved through the following technical solutions:
A kind of integrated form process industry dynamic process control experimental provision, described experimental provision is made of two above capacitance-resistance tanks, adopt no pipeline, valveless integrated form to constitute the experimental provision of simulated object dynamic perfromance, configuration various control system mode is tested, it is that the capacitance-resistance link constitutes that the controlled device of experimental provision adopts no pipeline, the integrated elementary cell of valveless, adopt screw thread flap mode to change the resistance of throttle orifice liquid, the liquid resistance is consequently simulated multiple linearity or non-linear dynamic characteristic from the variation of 0-∞.
Described a kind of integrated form process industry dynamic process control experimental provision is placed the annex that simulation produces non-linear and pure hysteresis characteristic in the tank of described experimental provision.
Described a kind of integrated form process industry dynamic process is controlled experimental provision, and the part of simulation process control survey transmitter characteristic is arranged in the described experimental provision.
Described a kind of integrated form process industry dynamic process control experimental provision, its described experimental provision is tested ideal and the real work discharge characteristic of operation valve simultaneously.
Advantage of the present invention and effect are:
1. the controlled device of experimental provision adopts the integrated elementary cell of no pipeline (capacitance-resistance link) to constitute, and both can constitute single input-list output as required, also can constitute linearity or the non-linear dynamic characteristic of many inputs-many outputs.Be medium with water, with the used material of process industry general character arranged.Have multifrequency nature test, comprise open loop stabilization, instability, concussion, certainly weighing apparatus etc. tens of kinds.System time constant arrives tens of minutes in a few minutes at zero point, can change accurately, flexibly, easily and adjust as required.The throttle diameter of flow resistance can be as required at h-r-Q(liquid level-aperture-flow) conveniently check in the curve map, flow resistance R scope is 0-∞.
2. the instrument of using on the device is technical grade, and specifications and models are single, and quantity is few, reduced investment, and maintenance is little.
3. easy to operate, equipment, pipeline hand valve are minimum, and it is clear that stream simply moves towards, and annexation is directly perceived.
4. analogue means is made handling ease with transparent material, and price is low relatively.Graduation link student can design, assemble and adjust experiment, finishes overall process, can improve students practise quality, ability and level.Be specially adapted to practical teaching, the physics of the control channel of object, disturbance passage, coupling channel and time constant size constitutes, professional concept such as controllability, ornamental, one says that one refers to be readily understood that at a glance and have the effect of drawing inferences about other cases from one instance, and helps to solve the difficult point in the field research.
5. floor area is little.Analogue means is the wide x height of the long x of 0.65x1.2x1.9() m, about 1 square metre of floor area.A device has four independent controlled devices to supply four experimental group simultaneously, and it is many to have solved laboratory equipment, the little and financial strain problem in student's activities space.
6. energy-saving and environmental protection (low noise, cleaning), security are good.One covering device is powered with 220V AC, the about 1KW of power consumption, quiet water pump, cycling use of water.
Description of drawings
Fig. 1 is control system schematic diagram of the present invention;
Fig. 2 forms synoptic diagram for apparatus of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawing illustrated embodiment.
This process control device is integrated form, is elementary cell simulation controlled device and measuring transducer dynamic perfromance with transparent tank.No pipeline and valve between tank, principle of simulation are with identical with digital computer simulation mechanism, but it is the physical simulating method of realizing with fluid according to mathematical model.Liquid resistance and the liquid of each tank hold single order capacitance-resistance link of formation, and the big I of flow resistance is changed as required, and the capacity coefficient adjustable size is whole.Need multistage ssystem transfer function just with a plurality of tank simulations, integrated level is by two to a lot of.The system time constant scope, by several seconds to a few minutes at zero point or tens of minutes, precision was 1 grade.Connect and parallel connection with a plurality of tanks, constitute many inputs-controlled devices of exporting dissimilar, different numbers more, principle is seen Fig. 1, comprising: disturb the importation; Integrated form water tank group controlled process dynamic perfromance simulation part; Measure to become and send the simulated behavior part.
The realization function is included in can place the pure stickiness that pure hysteresis annex is realized τ=1-3 minute pure retardation time in the elementary cell tank; Plant characteristic that can simulation has open loop stabilization and unsettled, has only limit or zero limit is arranged, certainly weighing apparatus and non-oneself characteristic that weighs; See (maximum 12 rank) of low order and high-order from exponent number; Place non-linear annex and realize any nonlinear characteristic; On device, can do desirable to used operation valve and the actual working characteristics experiment simultaneously.
This experimental provision is mixed modern measure and control instrument, just can constitute the various procedures control system, realizes the purpose of experimental study.
Process control object of the present invention is three-decker, and every layer of transparent tank is divided into eight sulculuses at interval that differ in size, and wherein simulates controlled devices, four analogue measurement transmitter first-order characteristics for four.Interconvertible throttle orifice is arranged at each little tank side lower part and bottom, realizes flow resistance R=0-∞ by threaded seat and lid.R=0 during the throttle orifice uncovered, straight-through between groove, laterally leading directly to increases area.And vertically straight-through quite be passage, R=∞ during no port lid, isolation is obstructed between groove.Tank can be square or entirely for cylindrical.Three layers of tank are placed on the mounting, and the cycling use of water case is put in the bottom, and water tank two side lower parts are connected with four water pumps.The exit of pump pipeline is auto levelizer middle part vertically upward, divides two-way: the one tunnel install successively operation valve, on the spot show spinner-type flowmeter, measure the throttling orifice plate that flow is used, lead to water that the upper flume import enters at last as technical load; Another road is installed two with the hand valve, spinner-type flowmeter, the throttling orifice plate that produce quantitative step disturbance, also leads to the top tank at last.This water delivering orifice connects flexible pipe, during disturbance just can be added to, in the tank of bottom.Form and to see and comprise Fig. 2: water pump; Differential pressure transmitter, hand valve, electric control valve, differential pressure transmitter, flowmeter, cyclic water tank.Bottom tank outlet can be connected with near water pump, makes simulated object have the approximate integration characteristic.Device is furnished with eight differential pressure transmitters, surveys liquid level when being connected with tank, measurement of discharge when being connected with throttling orifice plate, and when being connected with the operation valve front and back, but the pressure drop of side valve.Have four experimental group to do when experiment simultaneously, every group with an operation valve, two differential pressure transmitters.Transmitter is placed on the framework of differing heights lattice as required, avoids adjusting when different purposes the trouble of range, also saves the instrument use amount simultaneously.Install design control system such as available various conventional control instrument, DCS, FCS and PLC.
Claims (4)
1. an integrated form process industry dynamic process is controlled experimental provision, it is characterized in that, described experimental provision is made of two above capacitance-resistance tanks, adopt no pipeline, valveless integrated form to constitute the experimental provision of simulated object dynamic perfromance, configuration various control system mode is tested, it is that the capacitance-resistance link constitutes that the controlled device of experimental provision adopts no pipeline, the integrated elementary cell of valveless, adopt screw thread flap mode to change the resistance of throttle orifice liquid, the liquid resistance is consequently simulated multiple linearity or non-linear dynamic characteristic from the variation of 0-∞.
2. a kind of integrated form process industry dynamic process control experimental provision according to claim 1 is characterized in that, places the annex that simulation produces non-linear and pure hysteresis characteristic in the tank of described experimental provision.
3. a kind of integrated form process industry dynamic process control experimental provision according to claim 1 is characterized in that the part of simulation process control survey transmitter characteristic is arranged in the described experimental provision.
4. a kind of integrated form process industry dynamic process control experimental provision according to claim 1 is characterized in that described experimental provision is tested ideal and the real work discharge characteristic of operation valve simultaneously.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726832A (en) * | 2013-12-25 | 2014-04-16 | 西南石油大学 | Deepwater drilling condition based marine riser mechanical behavior experiment simulation system and experiment method |
| CN109163879A (en) * | 2018-09-06 | 2019-01-08 | 沈阳化工大学 | A kind of process industry multivariable process dynamic characteristic Hydraulic simulation test devices and methods therefor |
| CN114283669A (en) * | 2021-12-24 | 2022-04-05 | 东北大学 | Automatic control experiment device and method for multivariable open-loop unstable object |
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| CN201910160U (en) * | 2010-10-12 | 2011-07-27 | 沈阳化工大学 | Process control experimental device |
| JP2012011383A (en) * | 2011-08-01 | 2012-01-19 | Toshiba Corp | System for supporting operation of water treatment plant |
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| US20100023170A1 (en) * | 2001-06-08 | 2010-01-28 | Spillguard Technologies, Inc. | Apparatus for monitoring and controlling material handling system operations |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103726832A (en) * | 2013-12-25 | 2014-04-16 | 西南石油大学 | Deepwater drilling condition based marine riser mechanical behavior experiment simulation system and experiment method |
| CN109163879A (en) * | 2018-09-06 | 2019-01-08 | 沈阳化工大学 | A kind of process industry multivariable process dynamic characteristic Hydraulic simulation test devices and methods therefor |
| CN114283669A (en) * | 2021-12-24 | 2022-04-05 | 东北大学 | Automatic control experiment device and method for multivariable open-loop unstable object |
| CN114283669B (en) * | 2021-12-24 | 2023-02-28 | 东北大学 | Automatic control experiment device and method for multivariable open-loop unstable object |
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Effective date of registration: 20181229 Address after: 210012 Jiangsu Province Yuhuatai District Software Avenue 168, 3 buildings, 5 floors Patentee after: Jiangsu's software Polytron Technologies Inc Address before: No. 11, economic and Technological Development Zone, Shenyang, Liaoning Province, Liaoning Patentee before: Shenyang University of Chemical Technology |
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Address after: 3, building 168, 5, 210012 software Avenue, Yuhuatai District, Jiangsu, Nanjing Patentee after: Bozhi Safety Technology Co.,Ltd. Address before: 3, building 168, 5, 210012 software Avenue, Yuhuatai District, Jiangsu, Nanjing Patentee before: JIANGSU ELEX SOFTWARE TECHNOLOGY Co.,Ltd. |
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