CN201416120Y - Control system of fine-mesh pressure screen - Google Patents
Control system of fine-mesh pressure screen Download PDFInfo
- Publication number
- CN201416120Y CN201416120Y CN2009200260893U CN200920026089U CN201416120Y CN 201416120 Y CN201416120 Y CN 201416120Y CN 2009200260893 U CN2009200260893 U CN 2009200260893U CN 200920026089 U CN200920026089 U CN 200920026089U CN 201416120 Y CN201416120 Y CN 201416120Y
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- slurry
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- screen body
- pressurized screen
- pressure screen
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Abstract
The utility model relates to a control system of fine-mesh pressure screen, comprising a pressure screen body. A stock tank is connected with an inlet of the pressure screen body through a stock pump,and a PLC control device is respectively connected with an admission dilution water valve arranged on an admission 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 an admission pipeline behind the stock pump. The PLC control device is also connected with an accept pulp pressure gauge and an accept pulp valve both arranged on an accept pulp output pipeline of the pressure screen body, a reject pulp flow meter and a reject pulp valve both arranged on a reject pulp output pipelineof the pressure screen body, a reject pulp flow meter and a reject pulp valve both arranged on a reject pulp output pipeline of the pressure screen body, and a pressure screen dilution water valve connected with a dilution pipeline at one side of the pressure screen body. An ammeter is connected with a circuit of a motor which is connected with a rotation shaft at the bottom of the pressure screen body, and the PLC control device is connected with the ammeter. The control system of fine-mesh pressure screen has the advantages of simple operation, unattended 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, especially a kind of control system of selected pressurized screen.
Background technology:
In the paper-making pulping process flow process, selected pressurized screen is used for removing fine impurity in the paper pulp and sicker etc.Present selected pressurized screen generally adopts Artificial Control; 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 provides a kind of control system of selected pressurized screen, 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 partial pressure sieve body, stock tank links to each other through the stock inlet of stock pump with the pressurized screen 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 pressurized screen 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 pressurized screen body, be provided with tail slurry flowmeter and tail slurry valve successively by the tail slurry flow direction, on the dilution pipeline of pressurized screen body one side, also be connected with pressurized screen dilution water valve, very starch pressure gauge, good slurry valve, tail slurry flowmeter, tail slurry valve and pressurized screen 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 pressurized screen 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 selected pressurized screen operation, 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, pressurized screen dilution water valve; 13, motor; 14, ammeter; 15, PLC control device; 16, pressurized screen 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 pressurized screen body 16, stock tank 1 links to each other through the stock inlet of stock pump 2 with pressurized screen 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 pressurized screen 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 pressurized screen 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 pressurized screen body 16 1 sides, also be connected with pressurized screen dilution water valve 12, very starch pressure gauge 8, good slurry valve 9, tail slurry flowmeter 10, tail slurry valve 11 and pressurized screen 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 pressurized screen 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 pressurized screen 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 pressurized screen 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 pressurized screen body 16, and parameter is sent to PLC control device 15, good slurry pressure gauge 8 on the good slurry output pipe of pressurized screen 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 pressurized screen 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 the duty of selected pressurized screen, 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 the operating efficiency of selected pressurized screen, 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 during advancing to starch the pressure gauge 5 detected pressure reduction that advance to starch between the force value and exceed allowed band on the pulp-inlet pipe road, illustrate that the screen cylinder of selected pressurized screen stops up.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 pressurized screen dilution water valve 12 on tail slurry valve 11 and the dilution pipeline fully, slurry in the pressurized screen 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, closing presure sieve 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, so that selected pressurized screen enters normal operating conditions.This control system automaticity height can be realized unmanned, and is simple to operate, guaranteed the normal operation of selected pressurized screen, 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 selected pressurized screen, comprise the pressurized screen body, stock tank links to each other through the stock inlet of stock pump with the pressurized screen 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 pressurized screen 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 pressurized screen body, be provided with tail slurry flowmeter and tail slurry valve successively by the tail slurry flow direction, on the dilution pipeline of pressurized screen body one side, also be connected with pressurized screen dilution water valve, very starch pressure gauge, good slurry valve, tail slurry flowmeter, tail slurry valve and pressurized screen 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 pressurized screen body bottom, ammeter links to each other with the PLC control device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009200260893U CN201416120Y (en) | 2009-05-26 | 2009-05-26 | Control system of fine-mesh pressure screen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009200260893U CN201416120Y (en) | 2009-05-26 | 2009-05-26 | Control system of fine-mesh pressure screen |
Publications (1)
Publication Number | Publication Date |
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CN201416120Y true CN201416120Y (en) | 2010-03-03 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN2009200260893U Expired - Fee Related CN201416120Y (en) | 2009-05-26 | 2009-05-26 | Control system of fine-mesh pressure screen |
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CN (1) | CN201416120Y (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104165270A (en) * | 2014-08-19 | 2014-11-26 | 云南大红山管道有限公司 | Dilution control system and method of iron ore concentrate pulp conveyed through pipes |
CN110158345A (en) * | 2018-09-28 | 2019-08-23 | 江门欧佩德晶华轻工机械有限公司 | Intelligent pressure sieve |
-
2009
- 2009-05-26 CN CN2009200260893U patent/CN201416120Y/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104165270A (en) * | 2014-08-19 | 2014-11-26 | 云南大红山管道有限公司 | Dilution control system and method of iron ore concentrate pulp conveyed through pipes |
CN104165270B (en) * | 2014-08-19 | 2017-03-29 | 云南大红山管道有限公司 | A kind of pipeline iron ore concentrate slurry dilution control system and its control method |
CN110158345A (en) * | 2018-09-28 | 2019-08-23 | 江门欧佩德晶华轻工机械有限公司 | Intelligent pressure sieve |
WO2020063906A1 (en) * | 2018-09-28 | 2020-04-02 | 江门欧佩德晶华轻工机械有限公司 | Intelligent pressure screen |
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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 |