CN101853035A - Differential-pressure air conditioning device of pipeline pneumatic conveying system and control method thereof - Google Patents
Differential-pressure air conditioning device of pipeline pneumatic conveying system and control method thereof Download PDFInfo
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- CN101853035A CN101853035A CN 201010183842 CN201010183842A CN101853035A CN 101853035 A CN101853035 A CN 101853035A CN 201010183842 CN201010183842 CN 201010183842 CN 201010183842 A CN201010183842 A CN 201010183842A CN 101853035 A CN101853035 A CN 101853035A
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Abstract
The invention relates to a pipeline pneumatic conveying device, in particular to a differential-pressure air conditioning device of a pipeline pneumatic conveying system and a control method thereof. The differential-pressure air conditioning device of the pipeline pneumatic conveying system is characterized by comprising a pressure sensor for measuring the downstream pressure of a pipeline, a pressure regulation assembly arranged at the upstream of the pipeline and a central control unit for controlling the pressure regulation assembly according to a measurement value of the pressure sensor. The invention has the characteristics of conditioning air current in time according to the downstream pressure change of the conveying pipeline and effectively implementing automatic air current control, convenient use, precise control, and the like to pipeline pneumatic conveying.
Description
Technical field
The present invention relates to a kind of pipeline Pneumatic conveyer, especially relate to a kind of differential pressure type air flow regulator of pipeline air-transport system, the invention still further relates to the control method of said apparatus.
Background technology
As everyone knows, the pipeline Pneumatic Conveying Technology develops rapidly in recent years, at a large amount of this low energy consumption of employing, oligosaprobic mode of movements of industry such as chemical industry, chemical fibre, food, medicine.In the pipeline air-transport system, reach the stable and low unification of energy consumption of transportation work, air-flow control is necessary.Particularly strength is carried after big output, middle and long distance transportation art are expanded, and it is more obvious that current-controlled importance shows.
For granular material, when carrying out the middle and long distance conveying, material constantly clashes in pipeline, rubs, and can cause the fragmentation of material, produces a large amount of dust.This has not only reduced the quality of material, has also increased the weight of the burden of vent gas treatment.If gas flow can be effectively controlled, can reduce transporting velocity, reduce to clash into the intensity of friction, reduce the percentage of damage of material, avoid producing too much dust; For granular material, need effective pilot-gas flow equally, reduce the percentage of damage of material, in order to avoid the production of subsequent handling is caused bad influence.
But, cross when low when gas flow rate, can make to carry to become unstable, occur putty easily, produce " blowing out " phenomenon when serious, pipeline, pipe support, feed bin are caused very big bang, destroy physical construction.Strength being carried particle, granular material, carry out dynamic monitoring, adopt differential pressure type air-flow automatic regulator, is the effective means that a kind of stable strength is carried situation, cut down the consumption of energy.The general mechanical type variable valve that adopts single stage of pressure, its shortcoming is: can not in time adjust according to disturbances, and inoperative to gas flow control.
Summary of the invention
The present invention mainly is at the above-mentioned technical matters of existing in prior technology, provide a kind of and can in time adjust air-flow, can carry the pipeline strength effectively and implement the differential pressure type air flow regulator and the control method thereof of the pipeline air-transport system of control airshed automatically according to the variation of transporting pipe downstream pressure.
First technical scheme of the present invention is: a kind of differential pressure type air flow regulator of pipeline air-transport system, it is characterized in that: comprised the pressure transducer that is used for the measuring channel downstream pressure, the pressure adjusting part that is arranged on the pipeline upstream, and according to the central control unit of the measured value controlled pressure adjusting part of described pressure transducer.The objective of the invention is to design a kind of pipeline strength is carried and implement the equipment of control airshed automatically, before the operation of pipeline Pneumatic conveyer, set normal operation parameter earlier, monitor the conveying device pressure condition in real time by downstream pressure sensor during operation.
As preferably, described pressure adjusting part has comprised a variable valve that is arranged on the Laval thrower of pipeline upstream and is used to regulate Laval thrower throat sectional area.
As preferably, described variable valve has comprised an airtight air inlet cavity and the propelling movement assembly that the needle point position is movably stretched into the metering needle of Laval thrower throat and is used to promote metering needle turnover Laval thrower throat that is connected and is used for pressurized air is fed the Laval thrower of a side end with Laval thrower throat place.The throat opening area of Laval thrower can or be return and correspondingly reduces or increase along with the propelling of metering needle, the long-pending determinative that is decision by its flow in the throat section of Laval thrower, so variation of throat opening area, can make its flow that corresponding the variation taken place, so just play the effect of automatic adjusting flow.So when the system back pressure reduction, reversible electric machine Control Flow metering needle advances, Laval thrower throat area reduces, by its also minimizing thereupon of airshed; System back pressure raises, and reversible electric machine Control Flow metering needle is stepped back, and Laval thrower throat area increases, and increases by its its flow thereupon.System is in a dynamic balance state all the time like this, has both guaranteed to carry normally to move, and can save gas consumption to greatest extent again.
As preferably, described propelling movement assembly comprises that one is set in the bearing on the metering needle and is used for driving bearing and the reversible electric machine of the two any one rotation of metering needle.The contact control reversible electric machine that sets according to the variable size in the central control unit program produces displacement, flexible by the flow regulation pin that reversible electric machine drives in playpipe throat, thus the sectional area size of change playpipe throat is to reach the function of regulating rate of discharge.
As preferably, be provided with regulator between described central control unit and the pressure adjusting part, described reversible electric machine is controlled by described regulator.After regulator received signal, the control reversible electric machine carried out forward or backwards running, drove the flow regulation pin and advanced and advance or return backward.
As preferably, be provided with analog-to-digital conversion module between input port of described central control unit and the pressure transducer, insert between output port of central control unit and the regulator and be provided with D/A converter module.When recording system pressure and reduce, pressure unit changes this pressure signal into 4～20mA electric signal (analog quantity), and this signal is input in the analog-to-digital conversion module; After analog-to-digital conversion module changes analog signals into digital signal, be input among the CPU of central control unit, through after the computing of program, digital signal is input in the D/A converter module, D/A converter module is to import regulator into behind the analog signals again with digital signal transition.
As preferably, the connecting portion of described cavity and Laval thrower is provided with the fluidisation column plate.
Second technical scheme of the present invention is: a kind of control method of differential pressure type air flow regulator comprises the steps:
A. pressure transducer records the force value Va of pipe downstream, behind analog-to-digital conversion module, inputs to central control unit;
B. be set with the normal working pressure V parameter ref of pipeline air-transport system in the central control unit, the pipe downstream force value Va that Vref and pressure transducer are recorded compares, and controls described pressure adjusting part according to comparative result through D/A converter module.
If Vref＜Va c., described central control unit regulating and controlling pin is to the direction motion of withdrawing from the Laval thrower;
If Vref＞Va d., described central control unit regulating and controlling pin is to the direction motion that pushes the Laval thrower.
As preferably, when described metering needle when pushing the direction motion of described Laval thrower, throat's cross-sectional area of described Laval thrower reduces; When described metering needle to direction when motion of withdrawing from described Laval thrower, throat's cross-sectional area of described Laval thrower increases.During air-transport system work, the pressure unit that is arranged on pipe downstream obtains downstream pressure signal, signal input Programmable Logic Controller with sensor output, after the central control unit programmed control, thereby regulate the inlet pressure of playpipe by the mistake basal area of regulating automatic pressure regulator, utilize air-flow playpipe inlet pressure can change the characteristic of rate of discharge, thereby regulate the gas flow of induction system.Corresponding relation according to pressure unit pressure variety and current signal, the contact control reversible electric machine that sets according to the variable size in the central control unit program produces displacement, flexible by the flow regulation pin that reversible electric machine drives in playpipe throat, thus the sectional area size of change playpipe throat is to reach the function of regulating rate of discharge.
Therefore, the present invention has and can in time adjust air-flow according to the variation of transporting pipe downstream pressure, can be effectively the pipeline strength be carried control airshed, easy to use, the characteristics such as control is accurate implemented automatically.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of pressure adjusting part in the invention.
Accompanying drawing 2 is a kind of structured flowcharts of invention.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1:
Shown in Figure of description 1,2, a kind of differential pressure type air flow regulator of pipeline air-transport system, comprised the pressure transducer 1 that is used for the measuring channel downstream pressure, the pressure adjusting part 2 that is arranged on the pipeline upstream, and according to the central control unit 3 of the measured value controlled pressure adjusting part of described pressure transducer.Pressure adjusting part 2 has comprised that one is arranged on the Laval thrower 21 of pipeline upstream and is used to regulate the long-pending variable valve 22 in Laval thrower 21 throat sections.Variable valve 22 has comprised an airtight air inlet cavity 23 and the propelling movement assembly that the needle point position is movably stretched into the metering needle 24 of Laval thrower 21 throats and is used to promote metering needle turnover Laval thrower 21 throats that is connected and is used for pressurized air is fed the Laval thrower of the side end with Laval thrower 21 throat places.Push assembly and comprise that one is set in the bearing 27 on the metering needle and is used for the reversible electric machine 28 that driving bearing 27 rotates.Be provided with regulator 4 between central control unit 3 and the pressure adjusting part 2, reversible electric machine 28 is controlled by regulator 4.Be provided with analog-to-digital conversion module 5 between input port of central control unit 3 and the pressure transducer 1, insert between output port of central control unit and the regulator 4 and be provided with D/A converter module 6.Cavity 23 is provided with fluidisation column plate 26 with the connecting portion of Laval thrower 21.
The control method of differential pressure type air flow regulator comprises the steps:
1. pressure transducer 1 records the force value Va in conveyance conduit 7 downstreams, behind analog-to-digital conversion module 5, inputs to central control unit 3;
2. be set with the normal working pressure V parameter ref of pipeline air-transport system in the central control unit 3, the conveyance conduit 7 downstream pressure value Va that Vref and pressure transducer 1 are recorded compare, according to comparative result through D/A converter module 6 controlled pressure adjusting parts 2.
3. if Vref＜Va, central control unit 3 regulating and controlling pins 24 are to the direction motion of withdrawing from Laval thrower 21;
4. if Vref＞Va, central control unit 3 regulating and controlling pins 24 are to the direction motion that pushes Laval thrower 21.
The objective of the invention is to design a kind of equipment of implementing to control automatically airshed that the pipeline strength is carried.Before the operation of pipeline Pneumatic conveyer, set normal operation parameter earlier, monitor the conveying device pressure condition in real time by downstream pressure sensor during operation.When recording system pressure and reduce, pressure unit changes this pressure signal into 4～20mA electric signal (analog quantity), and this signal is input in the analog-to-digital conversion module; After analog-to-digital conversion module changes analog signals into digital signal, be input among the CPU of central control unit, through after the computing of program, digital signal is input in the D/A converter module, D/A converter module is to import regulator into behind the analog signals again with digital signal transition.After regulator received signal, the control reversible electric machine carried out forward or backwards running, drive the flow regulation pin and advance and advance or return backward, thereby the sectional area size that changes playpipe throat is to reach the function of regulating rate of discharge.
Should be understood that this embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (9)
1. the differential pressure type air flow regulator of a pipeline air-transport system, it is characterized in that: comprised the pressure transducer (1) that is used for the measuring channel downstream pressure, the pressure adjusting part (2) that is arranged on the pipeline upstream, and according to the central control unit (3) of the measured value controlled pressure adjusting part of described pressure transducer.
2. the differential pressure type air flow regulator of pipeline air-transport system according to claim 2 is characterized in that described pressure adjusting part (2) has comprised that one is arranged on the Laval thrower (21) of pipeline upstream and is used to regulate the long-pending variable valve (22) in Laval thrower (21) throat section.
3. the differential pressure type air flow regulator of pipeline air-transport system according to claim 1 and 2 is characterized in that described variable valve (22) has comprised an airtight air inlet cavity (23) and the propelling movement assembly that the needle point position is movably stretched into the metering needle (24) of Laval thrower (21) throat and is used to promote metering needle turnover Laval thrower (21) throat that is connected and is used for pressurized air is fed the Laval thrower of a side end with Laval thrower (21) throat place.
4. the differential pressure type air flow regulator of pipeline air-transport system according to claim 3 is characterized in that described propelling movement assembly comprises that one is set in the bearing (27) on the metering needle and is used for driving bearing (27) and the reversible electric machine (28) of the two any one rotation of metering needle (24).
5. the differential pressure type air flow regulator of pipeline air-transport system according to claim 4, it is characterized in that being provided with regulator (4) between described central control unit (3) and the pressure adjusting part (2), described reversible electric machine (28) is controlled by described regulator (4).
6. the differential pressure type air flow regulator of pipeline air-transport system according to claim 5, it is characterized in that being provided with analog-to-digital conversion module (5) between input port of described central control unit (3) and the pressure transducer (1), insert between output port of central control unit (3) and the regulator (4) and be provided with D/A converter module (6).
7. the differential pressure type air flow regulator of pipeline air-transport system according to claim 3 is characterized in that the described cavity (23) and the connecting portion of Laval thrower (21) are provided with fluidisation column plate (26).
8. the control method as any described differential pressure type air flow regulator in the claim 1～8 comprises the steps:
A. pressure transducer (1) records the force value Va of pipe downstream, behind analog-to-digital conversion module (5), inputs to central control unit (3);
B. be set with the normal working pressure V parameter ref of pipeline air-transport system in the central control unit (3), the pipe downstream force value Va that Vref and pressure transducer (1) are recorded compares, according to comparative result through D/A converter module (6) control described pressure adjusting part (2).
If Vref＜Va c., described central control unit (3) regulating and controlling pin (24) is to the direction motion of withdrawing from Laval thrower (21);
If Vref＞Va d., described central control unit (3) regulating and controlling pin (24) is to the direction motion that pushes Laval thrower (21).
9. control method according to claim 8 is characterized in that: when described metering needle (24) to direction when motion that pushes described Laval thrower (21), throat's cross-sectional area of described Laval thrower (21) reduces; When described metering needle (24) to direction when motion of withdrawing from described Laval thrower (21), throat's cross-sectional area of described Laval thrower (21) increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010183842 CN101853035A (en) | 2010-05-27 | 2010-05-27 | Differential-pressure air conditioning device of pipeline pneumatic conveying system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010183842 CN101853035A (en) | 2010-05-27 | 2010-05-27 | Differential-pressure air conditioning device of pipeline pneumatic conveying system and control method thereof |
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| CN101853035A true CN101853035A (en) | 2010-10-06 |
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| CN 201010183842 Pending CN101853035A (en) | 2010-05-27 | 2010-05-27 | Differential-pressure air conditioning device of pipeline pneumatic conveying system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109542130A (en) * | 2018-11-07 | 2019-03-29 | 广东震仪智能装备股份有限公司 | Ion nozzle flow control system and equipment |
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| JPH07187387A (en) * | 1993-12-27 | 1995-07-25 | Chichibu Onoda Cement Corp | Automatic paint supply device having flow rate control device |
| CN2820779Y (en) * | 2005-09-06 | 2006-09-27 | 天津市纽普兰环保发展有限公司 | Powder material flexible pneumatic conveyer |
| CN101462645A (en) * | 2007-12-19 | 2009-06-24 | 青岛高校软控股份有限公司 | Automatic adjustable dragging method pipe |
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2010
- 2010-05-27 CN CN 201010183842 patent/CN101853035A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4483646A (en) * | 1982-05-07 | 1984-11-20 | Denka Consultant & Engineering Co., Ltd. | Apparatus for distributing powdered particles |
| JPH07187387A (en) * | 1993-12-27 | 1995-07-25 | Chichibu Onoda Cement Corp | Automatic paint supply device having flow rate control device |
| CN2820779Y (en) * | 2005-09-06 | 2006-09-27 | 天津市纽普兰环保发展有限公司 | Powder material flexible pneumatic conveyer |
| CN101462645A (en) * | 2007-12-19 | 2009-06-24 | 青岛高校软控股份有限公司 | Automatic adjustable dragging method pipe |
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| 《http://www.foodmate.net/lesson/270/index.php》 20100327 沈阳师范大学 《通风除尘与物料输送》 1-7 , * |
| 《中国优秀硕士学位论文全文数据库（电子期刊）》 20061115 蒋存刚 《密相气力输送机理研究及可调拉伐尔管应用研究》 1-7 , 第11期 * |
| 《中国优秀硕士学位论文全文数据库（电子期刊）》 20090515 高天宝 《气力输送气量控制与可调式LAVAL管研究》 第28页最后一段，第29页第一段，图3-3 2-9 , 第5期 * |
| 《中国优秀硕士学位论文全文数据库（电子期刊）》 20090515 高天宝 《气力输送气量控制与可调式LAVAL管研究》 第28页最后一段，第29页第一段，图3-3 2-9 , 第5期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109542130A (en) * | 2018-11-07 | 2019-03-29 | 广东震仪智能装备股份有限公司 | Ion nozzle flow control system and equipment |
| CN109542130B (en) * | 2018-11-07 | 2021-10-08 | 广东震仪智能装备股份有限公司 | Ion shower nozzle flow control system and equipment |
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Application publication date: 20101006 |