CN103274223A - Special air saving unit for pneumatic conveying and control system of special air saving unit - Google Patents
Special air saving unit for pneumatic conveying and control system of special air saving unit Download PDFInfo
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- CN103274223A CN103274223A CN2013102484423A CN201310248442A CN103274223A CN 103274223 A CN103274223 A CN 103274223A CN 2013102484423 A CN2013102484423 A CN 2013102484423A CN 201310248442 A CN201310248442 A CN 201310248442A CN 103274223 A CN103274223 A CN 103274223A
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Abstract
The invention relates to a special air saving unit for pneumatic conveying and a control system of the special air saving unit, and belongs to the field of energy conservation of pneumatic systems. The special air saving unit is mainly used for controlling flow and pressure of a system for pneumatically conveying materials by the aid of compressed air, the flow and upstream pressure are kept in proportional relation by a flow stabilizing element (6) when downstream pressure fluctuates within a certain range, stability of the upstream pressure is controlled by an adjusting valve (2) at the upstream of the flow stabilizing element (6), gas flow is kept at a needed constant value, and purge flow peak and flow reduction due to blockage are effectively avoided. According to operating parameters of an air compressor, peak load shaving functions can be achieved for air consumption, system pressure is stabilized, and operating electric energy of the air compressor can be saved.
Description
Technical field
The invention belongs to energy-saving field of pneumatic, relate to and utilize pressurized air that material is carried out flow system flow and the pressure control that strength is carried.
Background technology
The strength conveying system utilizes pressurized air that powdery, granular material are carried, and principle is that pressurized air is mixed with material, utilizes compressed air pressure can be converted into the kinetic energy of air, mixtures of materials, and material is carried in pipeline.But since the design of pipeline bore, supply gas pressure unreasonable, lack the factors such as control device to flow, the strength conveying system tend to produce very big waste with airshed, influence compressed air system pressure, cause the increase of Air compressor energy consumption.Therefore the supply air line that strength is carried carries out necessary transformation, is the energy-saving and cost-reducing effective means of strength conveying system to rationally controlling with airshed.
The particular problem that at present traditional strength conveying system exists is as follows:
(1) downstream pressure is because the variation of the interior material state of pipeline can produce big fluctuation, and when downstream pressure increased, feed flow reduced, and solid accumulation causes stopping up in the pipeline.
(2) downstream pressure is low, and feed flow raises and produces waste.。
Summary of the invention
Purpose of the present invention:
For the strength conveying system provides cover special-purpose solar term unit and a control system thereof, stable and limit transport flow, stabilization system pressure reaches energy saving purposes.
Description of drawings
Fig. 1 is systematic schematic diagram of the present invention.
1. source of the gas, 2. main road control cock, 3. bypass valve, 4. control unit, 5. upstream pressure sensor, 6. current stabilization element, 7. downstream pressure sensor, 8. control and state parameter, 9. the status signal of external equipment
Technical scheme of the present invention:
Main gas circuit is made up of current stabilization element (6) and control cock (2), current stabilization element (6) is the reducing and expansion tubular construction, critical pressure ratio reaches more than 0.8, current stabilization element (6) upstream has control cock (2), bypass gas circuit and bypass valve (3) are in parallel with main gas circuit, the control of bypass valve (3) control system, control system comprises control unit (4), upstream pressure sensor (5) and downstream pressure sensor (7).
Described control system is monitored the pressure of current stabilization element upstream and downstream in real time, the pressure signal that downstream pressure sensor (7) is gathered during less than higher limit defeated material normal, bypass valve (3) cuts out, upstream pressure signal (5) is as the feedback signal of control main road control cock (2), make pressure stability within the specific limits, when pressure signal pipe choking during greater than higher limit, bypass valve (3) pulsed opens and closes, control cock (2) aperture maximum, when pressure signal system's current limliting during less than lower limit, bypass disc (3) is closed, control cock (2) aperture minimum.
Control unit (4) will be controlled parameter and state parameter (8) output, and accept the status information (9) of external equipment.
The specific embodiment
1, control unit has touch-screen, communicates by letter with main control PLC, shows upstream and downstream pressure and valve opening feedback real-time curve, and can arrange each valve opening and closing and programming control parameter by touch button.
2, control program is divided into manual state and auto state, under manual state, moves by touch-screen manual operation valve.The aperture of main road control cock (2) can be set and feed back opening value; If bypass valve (3) is switch valve, its switching value and feedback switch state can be set, if bypass valve (3) is control cock, its aperture can be set and feeds back opening value.When defeated material takes place, can understand required current stabilization element (6) the upstream pressure scope and corresponding control cock (2) aperture scope of normal defeated material by the debugging of manual state lower valve, downstream pressure when putty trend takes place, state parameters such as the downstream pressure value when defeated material is near completion are for the setting of auto state parameter provides reference.
3, under the program auto state, the principal parameter that needs to arrange comprises: current limliting pressure p 21, plugging pressure p 22 (p21＜p22), upstream pressure bound p11, p12(p11＜p12), the minimum aperture S10 of control cock, maximum opening S11(S10＜S11), bypass expected time of arrival and departure T1, time T 2 is closed in bypass.When defeated material takes place, monitor current stabilization element upstream pressure p1 and downstream pressure p2 in real time.
3.1 when p2 has p21＜p2＜p22, be normal feed status, close bypass valve (3), if the aperture of control cock (2) is S1, at this moment, when p1＜p11, increase S1, as p1〉during p12, reduce S1, otherwise S1 is constant, finally make current stabilization element (6) upstream pressure p1 stable within the specific limits, be p11≤p1≤p12, but for preventing that the too fast valve event that produces of upstream pressure fluctuation from lagging behind, restriction aperture S1 make S10＜S1＜S11.Parameter is through after rationally arranging, under normal feed status, gas through current stabilization element (6) forms supersonic speed owing to be subjected to choking effect, make downstream pressure not influence upstream pressure to a certain extent, delivery rate basicly stable one controlled among a small circle in, can big ups and downs, can be owing to material opaque quantitative changeization produced high flow capacity, improve traffic capacity during slight putty, can effectively prevent plugging.
3.2 when p2≤p21, be limited current state, control cock (2) is got to S10, bypass valve (3) cuts out.General this situation occur in carry initial and latter end or pipeline in material-gas ratio very little and when causing downstream pressure less than normal, at this moment, system's conveying tolerance minimum has effectively been eliminated the peak value of flow, has reduced meaningless high air consumption.
3.3 as p2〉during p22, be the plugging state, control cock (2) is got to S11, and bypass disc (3) pulsed opens and closes, and namely opens time T 1, and shut T2 opens time T 1 again, so alternately opens and closes, and the downstream pipeline is purged.Because behind the bypass standard-sized sheet, flow moment increases, and pulsed opens and closes and can either impact putty, saves flow again relatively
The auto-programming of control unit can above-mentioned control is required control parameter and state parameter (8) feed back to the air compression plant monitored control system, and collect centrifugal air compressor air inlet stator valve status information (9), realize the joint control with a pneumatics group of planes.When the state that detects conveying system is current limliting or be tending towards current limliting for a long time, and air inlet stator valve opening is when big, and illustrative system pressure is higher, and is more than needed with airshed, can reduce stator valve opening or unloading part pneumatics; When detecting the conveying system long-play normally or being tending towards putty; and air inlet stator valve opening hour; illustrative system pressure is on the low side; can increase the stator valve opening; increase aperture and the delivery pressure of control cock (2), improve transport efficiency, reach peak load shifting with this; stabilization system pressure, the effect of saving the compressor operation electric energy.
Claims (3)
1. a strength is failed material special-purpose solar term unit and control system thereof, it is characterized in that: main gas circuit is made up of current stabilization element (6) and control cock (2), current stabilization element (6) is the reducing and expansion tubular construction, critical pressure ratio reaches more than 0.8, current stabilization element (6) upstream has control cock (2), bypass gas circuit and bypass valve (3) are in parallel with main gas circuit, bypass valve (3) is connected with control system, control system comprises control unit (4), upstream pressure sensor (5) and downstream pressure sensor (7).
2. a kind of strength as claimed in claim 1 is failed material special-purpose solar term unit and control system thereof, it is characterized in that: described control system is monitored the pressure of current stabilization element upstream and downstream in real time, the pressure signal that downstream pressure sensor (7) is gathered during less than higher limit defeated material normal, bypass valve (3) cuts out, upstream pressure signal (5) is as the feedback signal of control main road control cock (2), make pressure stability within the specific limits, when pressure signal pipe choking during greater than higher limit, bypass valve (3) pulsed opens and closes, control cock (2) aperture maximum, when pressure signal system's current limliting during less than lower limit, bypass disc (3) is closed, control cock (2) aperture minimum.
3. a kind of strength as claimed in claim 1 is failed material special-purpose solar term unit and control system thereof, it is characterized in that: control unit (4) will be controlled parameter and state parameter (8) output, and accept the status information (9) of external equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102484423A CN103274223A (en) | 2013-06-21 | 2013-06-21 | Special air saving unit for pneumatic conveying and control system of special air saving unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102484423A CN103274223A (en) | 2013-06-21 | 2013-06-21 | Special air saving unit for pneumatic conveying and control system of special air saving unit |
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| CN103274223A true CN103274223A (en) | 2013-09-04 |
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| CN2013102484423A Pending CN103274223A (en) | 2013-06-21 | 2013-06-21 | Special air saving unit for pneumatic conveying and control system of special air saving unit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820593A (en) * | 2014-03-19 | 2014-05-28 | 中天钢铁集团有限公司 | Blowing rate adjusting system for pulverized coal blowing tank |
| CN104806888A (en) * | 2014-01-24 | 2015-07-29 | 上海华林工业气体有限公司 | Bypass control system for producing CO |
| CN105621105A (en) * | 2016-02-05 | 2016-06-01 | 北京国电富通科技发展有限责任公司 | Pneumatic conveying device and auxiliary pipeline control system of pneumatic conveying device |
| CN113543819A (en) * | 2019-03-20 | 2021-10-22 | 史密夫及内修公开有限公司 | Exhaust blockage detection for negative pressure wound therapy devices |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002088861A1 (en) * | 2001-04-27 | 2002-11-07 | Fisher Controls International, Llc | Intelligent regulator with input/output capabilities |
| US20050182524A1 (en) * | 2004-02-12 | 2005-08-18 | Brodeur Craig L. | System and method for flow monitoring and control |
| CN200999969Y (en) * | 2007-02-08 | 2008-01-02 | 张永亮 | Pipeline pressure regulating apparatus |
| CN102360229A (en) * | 2011-11-07 | 2012-02-22 | 上海节能技术服务有限公司 | Intelligent compressed air flow control device |
| CN202228922U (en) * | 2011-03-18 | 2012-05-23 | 北京爱社时代科技发展有限公司 | Energy saving management unit for pipeline gas supply |
| CN203382227U (en) * | 2013-06-21 | 2014-01-08 | 北京爱社时代科技发展有限公司 | Throttle unit designed for pneumatic conveying and control system therefor |
-
2013
- 2013-06-21 CN CN2013102484423A patent/CN103274223A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002088861A1 (en) * | 2001-04-27 | 2002-11-07 | Fisher Controls International, Llc | Intelligent regulator with input/output capabilities |
| US20050182524A1 (en) * | 2004-02-12 | 2005-08-18 | Brodeur Craig L. | System and method for flow monitoring and control |
| CN200999969Y (en) * | 2007-02-08 | 2008-01-02 | 张永亮 | Pipeline pressure regulating apparatus |
| CN202228922U (en) * | 2011-03-18 | 2012-05-23 | 北京爱社时代科技发展有限公司 | Energy saving management unit for pipeline gas supply |
| CN102360229A (en) * | 2011-11-07 | 2012-02-22 | 上海节能技术服务有限公司 | Intelligent compressed air flow control device |
| CN203382227U (en) * | 2013-06-21 | 2014-01-08 | 北京爱社时代科技发展有限公司 | Throttle unit designed for pneumatic conveying and control system therefor |
Non-Patent Citations (1)
| Title |
|---|
| 孙志强: "渐缩渐扩管测量原理", 《涡街流动特性检测与应用》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806888A (en) * | 2014-01-24 | 2015-07-29 | 上海华林工业气体有限公司 | Bypass control system for producing CO |
| CN104806888B (en) * | 2014-01-24 | 2017-07-04 | 上海华林工业气体有限公司 | One kind production CO Bypass Control Systems |
| CN103820593A (en) * | 2014-03-19 | 2014-05-28 | 中天钢铁集团有限公司 | Blowing rate adjusting system for pulverized coal blowing tank |
| CN103820593B (en) * | 2014-03-19 | 2016-02-03 | 中天钢铁集团有限公司 | Breeze blowing tank PCI rate adjustment system |
| CN105621105A (en) * | 2016-02-05 | 2016-06-01 | 北京国电富通科技发展有限责任公司 | Pneumatic conveying device and auxiliary pipeline control system of pneumatic conveying device |
| CN105621105B (en) * | 2016-02-05 | 2018-05-11 | 北京国电富通科技发展有限责任公司 | The subsidiary conduit control system of Pneumatic conveyer and Pneumatic conveyer |
| CN113543819A (en) * | 2019-03-20 | 2021-10-22 | 史密夫及内修公开有限公司 | Exhaust blockage detection for negative pressure wound therapy devices |
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Application publication date: 20130904 |