CN203382227U - Throttle unit designed for pneumatic conveying and control system therefor - Google Patents
Throttle unit designed for pneumatic conveying and control system therefor Download PDFInfo
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- CN203382227U CN203382227U CN201320360501.1U CN201320360501U CN203382227U CN 203382227 U CN203382227 U CN 203382227U CN 201320360501 U CN201320360501 U CN 201320360501U CN 203382227 U CN203382227 U CN 203382227U
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- flow
- pressure
- control system
- pneumatic conveying
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Abstract
The utility model is a throttle unit designed for pneumatic conveying and a control system therefor, which belong to the field of energy saving of pneumatic systems. The throttle unit designed for the pneumatic conveying and the control system are characterized in that compressed air is used for controlling system flow and pressure of the pneumatic conveying of material, a flow-stabilizing component (6) makes the flow and upstream pressure maintain a proportional relationship with downstream pressure fluctuating within a certain range, and a regulating valve (2) on the upstream of the flow-stabilizing component (6) controls the stability of the upstream pressure to make gas flow maintain a required constant value so that reducing of blocking material flow and purge flow peaks are effectively avoided. Combined with operation parameters of an air compressor, the throttle unit designed for the pneumatic conveying and the control system have the advantages of having the function of load shifting of gas consumption, achieving stable system pressure and saving operation energy of the air compressor.
Description
Technical field
The invention belongs to energy-saving field of pneumatic, relate to the flow system flow and the pressure that utilize pressurized air to carry out the strength conveying to material and control.
Background technology
The strength conveying system utilizes pressurized air to be carried powdery, granular material, and principle is mixed pressurized air 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 because the design of pipeline bore, supply gas pressure is unreasonable, lack the factors such as control device to flow, the strength conveying system by airshed, tend to produce very large waste, affect compressed air system pressure, cause the increase of Air compressor energy consumption.Therefore the supply air line of strength being carried carries out necessary transformation, to carry out rationally control by airshed, is the effective means of strength conveying energy saving of system consumption reduction.
The particular problem that at present traditional strength conveying system exists is as follows:
(1) downstream pressure is because the variation of material state in pipeline can produce large fluctuation, and when downstream pressure increases, feed flow reduces, and in pipeline, solid accumulation causes stopping up.
(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 a set of special-purpose solar term unit and control system thereof, stable and limit transport flow, stabilization system pressure, reach energy-saving and cost-reducing purpose.
technical scheme of the present invention:
Main gas circuit is comprised 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, and control system comprises control unit (4), upstream pressure sensor (5) and downstream pressure sensor (7).
The pressure of described control system Real-Time Monitoring current stabilization element upstream and downstream, when the pressure signal that downstream pressure sensor (7) gathers is less than higher limit, conveying is normal, bypass valve (3) cuts out, upstream pressure signal (5) is as the feedback signal of controlling main road control cock (2), make pressure stability within the specific limits, pipe choking when pressure signal is greater than higher limit, bypass valve (3) pulsed opens and closes, control cock (2) aperture maximum, system current limliting when pressure signal is 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 accompanying drawing explanation
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
The specific embodiment
1, control unit has touch-screen, with main control PLC, communicates by letter, and shows upstream and downstream pressure and valve opening feedback real-time curve, and can be arranged each valve opening and closing and programming control parameter by touch button.
2, control program is divided into manual mode and auto state, under manual mode, by touch-screen manual operation valve, moves.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 feedback switch state can be set, if bypass valve (3) is control cock, its aperture can be set and feeds back opening value.When conveying occurs, can understand required current stabilization element (6) the upstream pressure scope of normal conveying and corresponding control cock (2) aperture scope by the debugging of manual mode lower valve, downstream pressure when putty trend occurs, the state parameters such as downstream pressure value when conveying is near completion, for the setting of auto state parameter provides reference.
3, under the program auto state, need the principal parameter arranged to comprise: 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 conveying occurs, Real-Time Monitoring current stabilization element upstream pressure p1 and downstream pressure p2.
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, now, 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 after rationally arranging, under normal feed status, gas through current stabilization element (6) forms supersonic speed owing to being subject to choking effect, make downstream pressure not affect to a certain extent upstream pressure, delivery rate basicly stable one controlled among a small circle in, can big ups and downs, can be because material powder mass change 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 occurs in carries in initial and latter end or pipeline material-gas ratio very little and while causing downstream pressure less than normal, and now, system conveying tolerance minimum, effectively eliminated the peak value of flow, 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, i.e. opening time T1, shut T2, then opening time T1, so alternately open and close, and the downstream pipeline is purged.After the bypass standard-sized sheet, flow moment increases, and pulsed opens and closes and can either be impacted putty, relatively saves again flow
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 guide vane valve status information (9), realize the joint control with air compressor group.When the state that conveying system detected is current limliting or be tending towards current limliting for a long time, and the air inlet guide vane valve opening is when larger, and illustrative system pressure is higher, more than needed by airshed, can reduce stator valve opening or unloading part pneumatics; When the conveying system long-play being detected normally or being tending towards putty; and the air inlet guide vane 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, with this, reach peak load shifting; stabilization system pressure, the effect of saving the compressor operation electric energy.
Claims (1)
1. a strength conveying private section gas unit and control system thereof, it is characterized in that: main gas circuit is comprised 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320360501.1U CN203382227U (en) | 2013-06-21 | 2013-06-21 | Throttle unit designed for pneumatic conveying and control system therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320360501.1U CN203382227U (en) | 2013-06-21 | 2013-06-21 | Throttle unit designed for pneumatic conveying and control system therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203382227U true CN203382227U (en) | 2014-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320360501.1U Expired - Lifetime CN203382227U (en) | 2013-06-21 | 2013-06-21 | Throttle unit designed for pneumatic conveying and control system therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203382227U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274223A (en) * | 2013-06-21 | 2013-09-04 | 北京爱社时代科技发展有限公司 | Special air saving unit for pneumatic conveying and control system of special air saving unit |
| CN108801964A (en) * | 2018-09-20 | 2018-11-13 | 刘建松 | It is a kind of directly to measure formula gaseous pollutant emission monitoring device |
-
2013
- 2013-06-21 CN CN201320360501.1U patent/CN203382227U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274223A (en) * | 2013-06-21 | 2013-09-04 | 北京爱社时代科技发展有限公司 | Special air saving unit for pneumatic conveying and control system of special air saving unit |
| CN108801964A (en) * | 2018-09-20 | 2018-11-13 | 刘建松 | It is a kind of directly to measure formula gaseous pollutant emission monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100191 A506 computer building, No. 38, Xueyuan Road, Beijing, Haidian District, Patentee after: BEIJING ECOSO ENERGY TECHNOLOGY CO.,LTD. Address before: 100191 A506 computer building, No. 38, Xueyuan Road, Beijing, Haidian District, Patentee before: BEIJING ECOSO TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140108 |