CN201416126Y - Control system of pre-net flow pressure screen - Google Patents
Control system of pre-net flow pressure screen Download PDFInfo
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- CN201416126Y CN201416126Y CN2009200260874U CN200920026087U CN201416126Y CN 201416126 Y CN201416126 Y CN 201416126Y CN 2009200260874 U CN2009200260874 U CN 2009200260874U CN 200920026087 U CN200920026087 U CN 200920026087U CN 201416126 Y CN201416126 Y CN 201416126Y
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Abstract
The utility model relates to a control system of pre-net flow pressure screen, comprising a pre-net screen body. A stock tank is connected with an inlet of the pre-net screen body through a stock pump, and a PLC control device is respectively connected with an admission dilution water valve arranged on a pipeline in front of the stock pump and an admission concentration meter, an admission valve,an admission pressure gauge and an admission flow meter all arranged on a pipeline behind the stock pump. The PLC control device is also connected with an accept pulp pressure gauge and an accept pulpvalve both arranged on an accept pulp output pipeline of the pre-net screen body, a reject pulp flow meter and a reject pulp valve both arranged on a reject pulp output pipeline of the pre-net screenbody, and a pre-net screen dilution water valve connected with a dilution pipeline at one side of the pre-net screen body. An ammeter is connected with a circuit of a motor which is connected with arotation shaft at the bottom of the pre-net screen body, and the PLC control device is connected with the ammeter. The control system of pre-net flow pressure screen has the advantages of simple operation, high degree of automation, low failure rate, precise control, less waste and low cost.
Description
Technical field:
The utility model relates to a kind of control system, the control system of stream pressurization pressure sieve before especially a kind of the net.
Background technology:
In the papermaking flow process, stream pressurization pressure sieve is last one screening installation before the paper pulp online before the net, has the double action of uniform sizing material and screening impurity, does preferably for the pulp quality before surfing the Net and checks on.The general Artificial Control that adopts of stream pressurization pressure sieve before the present net; operating personnel are by observing the instrument parameter; the manual adjustment respective valves; it is very loaded down with trivial details to operate, and labour intensity is big, in addition; owing to adopt manual adjustment; be difficult to accomplish accurate control, usually can cause unnecessary wastage of material, increased production cost greatly.
The utility model content:
The utility model flows the control system that pressurization pressure sieves before a kind of the net is provided, and it is simple to operate, but unmanned, the automaticity height, fault rate is low, and control has accurately reduced waste, has saved production cost, has solved problems of the prior art.
The utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be: it comprises net fore worker body, stock tank links to each other through the stock inlet of stock pump with net fore worker body, be provided with into slurry dilution water valve on the pulp-inlet pipe road before stock pump, on the pulp-inlet pipe road behind the stock pump, flow to and be provided with into slurry densimeter, slurry-inlet valve door successively, advance to starch pressure gauge and advance to starch flowmeter, advance slurry dilution water valve, advance to starch densimeter, slurry-inlet valve door, advance to starch pressure gauge and advance to starch flowmeter and link to each other with the PLC control device respectively by slurry; On the good slurry output pipe of net fore worker body, be provided with good slurry pressure gauge and good slurry valve successively by the good slurry flow direction, on the tail slurry output pipe of net fore worker body, be provided with tail slurry flowmeter and tail slurry valve successively by the tail slurry flow direction, on the dilution pipeline of net fore worker body one side, also be connected with net fore worker dilution water valve, very starch pressure gauge, good slurry valve, tail slurry flowmeter, tail slurry valve and net fore worker dilution water valve and link to each other with the PLC control device respectively; Be connected with ammeter on the circuit of the motor that links to each other with the rotating shaft of net fore worker body bottom, ammeter links to each other with the PLC control device.
Each densimeter, pressure gauge, flowmeter, valve and ammeter that the utility model adopts the PLC control device with the pulp-inlet pipe road, very to starch on pipeline, tail slurry pipeline, dilution pipeline and the motor respectively are electrically connected, realized the automatic control of stream pressurization pressure sieve operation before the net, reduced fault rate, make simple to operation, can realize unmanned, and it is more accurate by the PLC control device turnover of slurry to be controlled, and has reduced waste, has saved production cost greatly.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Among the figure, 1, stock tank; 2, stock pump; 3, advance to starch densimeter; 4, advance slurry dilution water valve; 5, advance to starch pressure gauge; 6, advance to starch flowmeter; 7, slurry-inlet valve door; 8, very starch pressure gauge; 9, good slurry valve; 10, tail slurry flowmeter; 11, tail slurry valve; 12, net fore worker dilution water valve; 13, motor; 14, ammeter; 15, PLC control device; 16, net fore worker body.
The specific embodiment:
For clearly demonstrating the technical characterstic of this programme, below by the specific embodiment, and in conjunction with its accompanying drawing, the utility model is elaborated.
As shown in FIG., the utility model comprises net fore worker body 16, stock tank 1 links to each other through the stock inlet of stock pump 2 with net fore worker body 16, be provided with into slurry dilution water valve 4 on the pulp-inlet pipe road before stock pump 2, on the pulp-inlet pipe road behind the stock pump 2, flow to and be provided with into slurry densimeter 3, slurry-inlet valve door 7 successively, advance to starch pressure gauge 5 and advance to starch flowmeter 6, advance slurry dilution water valve 4, advance to starch densimeter 3, slurry-inlet valve door 7, advance to starch pressure gauge 5 and advance to starch flowmeter 6 and link to each other with PLC control device 15 respectively by slurry; On the good slurry output pipe of net fore worker body 16, be provided with good slurry pressure gauge 8 and good slurry valve 9 successively by the good slurry flow direction, on the tail slurry output pipe of net fore worker body 16, be provided with tail slurry flowmeter 10 and tail slurry valve 11 successively by the tail slurry flow direction, on the dilution pipeline of net fore worker body 16 1 sides, also be connected with net fore worker dilution water valve 12, very starch pressure gauge 8, good slurry valve 9, tail slurry flowmeter 10, tail slurry valve 11 and net fore worker dilution water valve 12 and link to each other with PLC control device 15 respectively; Be connected with ammeter 14 on the circuit of the motor 13 that links to each other with the rotating shaft of net fore worker body 16 bottoms, ammeter 14 links to each other with PLC control device 15.
During operation, start stock pump 2, open slurry-inlet valve door 7, paper pulp is extracted out by stock pump 2 from stock tank 1 and is sent to net fore worker body 16, and the 3 pairs of slurries of densimeter that advance to starch on the pulp-inlet pipe road detect, detected value is sent to PLC control device 15,15 pairs of these concentration values of PLC control device are judged comparison, if concentration is excessive, then send control instruction, control is advanced slurry dilution water valve 4 and is opened diluted slurry, meets the requirements to guarantee the slurry that enters net fore worker body 16.Advancing to starch pressure gauge 5 and advancing to starch flowmeter 6 force value and the flow value of test slurry respectively before the stock inlet of net fore worker body 16, and parameter is sent to PLC control device 15, good slurry pressure gauge 8 on the good slurry output pipe of net fore worker body 16 detects good slurry force value, and parameter is sent to PLC control device 15, tail slurry flowmeter 10 on the tail slurry output pipe of net fore worker body 16 detects the tail slurry flow value, and parameter is sent to PLC control device 15, PLC control device 15 will advance to starch force value and calculate comparison with good slurry force value, for guaranteeing to flow the duty that pressurization pressure sieves before the net, should be controlled at 0.01～0.03MP with advancing to starch the pressure reduction of force value with good slurry force value
aBetween, the requirement if calculating gained pressure reduction goes beyond the scope, then PLC control device 15 sends control instruction, controls good slurry valve 9 and regulates good slurry force value, meets technological requirement so that advance the pressure reduction of slurry and good slurry.PLC control device 15 will advance to starch flow value and the tail slurry flow value compares, for guaranteeing to flow the operating efficiency that pressurization pressure sieves before the net, should control the into ratio of slurry flow value and tail slurry flow value, generally with the tail slurry flow-control advance to starch flow 5～10% between, the requirement if the tail slurry flow goes beyond the scope, then PLC control device 15 sends control instruction, and control tail slurry valve 11 is regulated the tail slurry flow value, so that the tail slurry flow meets technological requirement with the ratio of advancing to starch flow.When the current value of the ammeter 14 of detected motor 13 raises suddenly, promptly exceed normal fluctuation range, and the good slurry pressure gauge 8 detected good slurry force value of very starching on the output pipe reduce, and advance to starch that pressure gauge 5 detects when advancing to starch pressure reduction between the force value and exceeding allowed band on the pulp-inlet pipe road, the screen cylinder obstruction of stream pressurization pressure sieve before the net be described.After PLC control device 15 is received the current value of motor 13 and is advanced to starch the good slurry force value of advancing to starch force value and good slurry pressure gauge 8 of pressure gauge 5, it is carried out integrated logic judges, send control instruction then, close good slurry valve 9, open the net fore worker dilution water valve 12 on tail slurry valve 11 and the dilution pipeline fully, slurry in the net fore worker body 16 is diluted, when the force value of good slurry pressure gauge 8 is elevated to when advancing to starch force value, illustrate to stop up and dredged, good slurry pressure gauge 8 sends back PLC control device 15 with force value, after handling, PLC control device 15 sends control instruction, open good slurry valve 9, close net fore worker dilution water valve 12, and recover tail slurry valve 11 to the origin-location, the flow-control of assurance tail slurry is advancing to starch 5～10% of flow, makes the preceding stream of net pressurization pressure sieve enter normal operating conditions.This control system automaticity height can be realized unmanned, and is simple to operate, guaranteed the normal operation of stream pressurization pressure sieve before the net, and fault rate is low, and control has accurately reduced the slurry waste, has reduced production cost.
The utility model does not describe part in detail, is those skilled in the art of the present technique's known technology.
Claims (1)
1, the control system of stream pressurization pressure sieve before the net, comprise net fore worker body, stock tank links to each other through the stock inlet of stock pump with net fore worker body, it is characterized in that: be provided with into slurry dilution water valve on the pulp-inlet pipe road before stock pump, on the pulp-inlet pipe road behind the stock pump, flow to and be provided with into slurry densimeter, slurry-inlet valve door successively, advance to starch pressure gauge and advance to starch flowmeter, advance slurry dilution water valve, advance to starch densimeter, slurry-inlet valve door, advance to starch pressure gauge and advance to starch flowmeter and link to each other with the PLC control device respectively by slurry; On the good slurry output pipe of net fore worker body, be provided with good slurry pressure gauge and good slurry valve successively by the good slurry flow direction, on the tail slurry output pipe of net fore worker body, be provided with tail slurry flowmeter and tail slurry valve successively by the tail slurry flow direction, on the dilution pipeline of net fore worker body one side, also be connected with net fore worker dilution water valve, very starch pressure gauge, good slurry valve, tail slurry flowmeter, tail slurry valve and net fore worker dilution water valve and link to each other with the PLC control device respectively; Be connected with ammeter on the circuit of the motor that links to each other with the rotating shaft of net fore worker body bottom, ammeter links to each other with the PLC control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200260874U CN201416126Y (en) | 2009-05-26 | 2009-05-26 | Control system of pre-net flow pressure screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200260874U CN201416126Y (en) | 2009-05-26 | 2009-05-26 | Control system of pre-net flow pressure screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201416126Y true CN201416126Y (en) | 2010-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200260874U Expired - Fee Related CN201416126Y (en) | 2009-05-26 | 2009-05-26 | Control system of pre-net flow pressure screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201416126Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074084A (en) * | 2013-03-27 | 2014-10-01 | 精工爱普生株式会社 | Sheet manufacturing apparatus |
| CN106625982A (en) * | 2016-10-19 | 2017-05-10 | 河南鑫饰板业有限公司 | Fiber stuff concentration control device |
| WO2017171608A1 (en) * | 2016-03-30 | 2017-10-05 | Valmet Ab | Screen feed arrangement |
-
2009
- 2009-05-26 CN CN2009200260874U patent/CN201416126Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074084A (en) * | 2013-03-27 | 2014-10-01 | 精工爱普生株式会社 | Sheet manufacturing apparatus |
| CN104074084B (en) * | 2013-03-27 | 2018-03-16 | 精工爱普生株式会社 | Sheet producing device |
| WO2017171608A1 (en) * | 2016-03-30 | 2017-10-05 | Valmet Ab | Screen feed arrangement |
| CN106625982A (en) * | 2016-10-19 | 2017-05-10 | 河南鑫饰板业有限公司 | Fiber stuff concentration control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100303 Termination date: 20140526 |