CN101413223B - Disc mill - Google Patents
Disc mill Download PDFInfo
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- CN101413223B CN101413223B CN2008102190861A CN200810219086A CN101413223B CN 101413223 B CN101413223 B CN 101413223B CN 2008102190861 A CN2008102190861 A CN 2008102190861A CN 200810219086 A CN200810219086 A CN 200810219086A CN 101413223 B CN101413223 B CN 101413223B
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- disc
- movable grinding
- grinding disc
- pulp
- control system
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Abstract
The invention discloses a disc refiner and a control method for the actuation of executive elements during the beating of the disc refiner. The control method comprises the following steps: a pulp inlet pipeline or a pulp outlet pipe of the disc refiner is provided with a pressure sensor; and the actuation of the executive elements of the disc refiner is controlled according to the pulp flow pressure of the pulp inlet pipeline during the beating, thereby controlling the beating process of the disc refiner. The method adopted in the invention is to control the actuation of the executive elements during the beating of the disc refiner, and can effectively prevent the friction collision among the executive elements of the disc refiner caused by pulp interruption during beating, thereby protecting the disc refiner.
Description
Technical field
The invention belongs to the pulping and paper-making field, relate to the control method of a kind of pulp preparation with executive component action in disc mill and the pulping process thereof.
Background technology
The production technology of pulp and paper industry comprises slurrying and papermaking two-stage process technology, pulping process is that various raw materials (are comprised wood raw material, non-wood materials such as straw, wheat straw, bamboo) make the fibrous raw material that can be used for papermaking---slurry by chemical method or mechanical means, paper technology is then handled the product slurry of slurrying workshop section by making beating after, be used for paper machine and copy paper, produce the product that is fit for various uses---paper.The effect of making beating is the effect by mechanical shear stress, make paper pulp fiber produce effects such as suction swollen, fibrillating, cut-out, improve interfibrous adhesion, with satisfy paper machine manufacture paper with pulp performance and consider water-based can needs, have the certain physical performance to guarantee the paper that paper machine is ferreted out.
Beating process realizes that by beating equipment the beating equipment that generally uses is a disc mill at present.In the mill chamber of disc mill, constitute the mill district between executive component---movable grinding disc and the fixed millstone, movable grinding disc can move axially by regulating device.During making beating, the movable grinding disc feed, movable grinding disc applies mechanical force such as extruding, shearing near fixed millstone to the paper pulp fiber by the mill district, makes the fiber through overground district obtain required characteristic.When making beating finishes, make the movable grinding disc withdrawing by regulating device, movable grinding disc leaves fixed millstone.In the pulping process, the intensity of regulating making beating by the gap of regulating between movable grinding disc and the fixed millstone is to satisfy the requirement of different fibrous raw materials and paper performance.Produce the disc mill of going up use at present and adopt the mechanical adjustment mode mostly, some adopts hydraulic way to regulate.
Chinese patent ZL03126695.9 discloses a kind of Disc Grinder Isopiestic Pressure Pulping Method And Device that preestablishes Moving plate and quiet dish minimum clearance.In production application, under predefined minimum clearance condition, pull an oar, for some slurry and paper, beating results fails to satisfy the requirement of paper performance to fibre property, and need Moving plate and quiet dish is further close, when interrupting suddenly, slurry will cause the frictional impact of Moving plate and quiet dish.
In pulping process, some factor may cause the unexpected interruption that slurry is carried, and for example local slurry concentration is too high to cause that obstruction, stock tank liquid level are too low, and perhaps the slurry conveying device breaks down etc.The unexpected interruption of slurry makes the mill district not have slurry to pass through, and may cause violent friction even collision between movable grinding disc and the fixed millstone, causes the excessive wear of mill, even causes mill to break, and produces serious consequence.
Summary of the invention
First purpose of the present invention is to overcome the shortcoming of prior art; a kind of disc mill is provided; when interrupting because some burst factor causes slurry to carry; cause when the mill chamber interior is broken slurry; make the movable grinding disc automatic withdrawal, thereby protected mill, the frictional impact between the disc mill executive component that effectively prevents to cause because of disconnected slurry in the pulping process; thereby the protective disc grinding machine helps production safety.
Another object of the present invention provides the control method of executive component action in a kind of Disc Refiner Beating Process.
A kind of disc mill, comprise pulp-inlet pipe road, pulp pipeline, movable grinding disc, fixed millstone and hydraulic control system, hydraulic control system comprises reversal valve, it is characterized in that also comprising pressure transducer, the controller that links to each other with pressure transducer, described pressure transducer is arranged on the pulp-inlet pipe road or on the pulp pipeline, described reversal valve is controlled by the controller.
Described reversal valve is solenoid directional control valve or electro-hydraulic directional valve.
Further, hydraulic control system comprises pilot operated compound relief valve, and hydraulic pressure is regulated by pilot operated compound relief valve, can realize remote pressure adjusting control.
The control method of executive component action in a kind of Disc Refiner Beating Process:
Be arranged on the pulp-inlet pipe road or the pressure transducer on the pulp pipeline sends the real-time pressure value to controller, when the real-time pressure value that records when pressure transducer meets or exceeds the force value of setting, and this moment, movable grinding disc was in the withdrawing state, controller sends the control signal of feed, make the movable grinding disc feed, movable grinding disc is near fixed millstone, and at this moment disc mill is in the making beating state;
The real-time pressure value that records when pressure transducer is during less than the force value set, and this moment, movable grinding disc was in the feed state, and controller sends the control signal of withdrawing, makes the movable grinding disc withdrawing, and movable grinding disc leaves fixed millstone.
Further, the action of executive component realizes that by hydraulic control system the control signal that controller sends feed makes the reversal valve action of hydraulic control system, thereby makes the movable grinding disc feed; The control signal that controller sends withdrawing makes the reversal valve action of hydraulic control system, thereby makes the movable grinding disc withdrawing.
Described reversal valve is solenoid directional control valve or electro-hydraulic directional valve.
Further, the force value of setting is 0.3MPa.
The principle of work of disc mill is as follows:
(1) disc mill starts.Connect the power supply of disc mill, boot disk grinding machine hydraulic control system then starts main motor, makes the running of disc mill movable grinding disc, at this moment leaves between executive component (movable grinding disc and fixed millstone), is in the withdrawing state, to not making beating effect of slurry.
(2) advance slurry.Open the valve on the pulp-inlet pipe road, make slurry enter the mill chamber of disc mill, behind overground district, enter the grout outlet road by the pulp-inlet pipe road.
(3) feed.When the slurry pressure on the pulp-inlet pipe road reaches or during greater than the force value set, as 0.3MPa, be arranged on the pulp-inlet pipe road or the pressure transducer on the pulp pipeline is sent to controller with force value, controller sends the control signal of feed, make the reversal valve action on the hydraulic control system, make the movable grinding disc feed, movable grinding disc makes disc mill be in the making beating state near fixed millstone.At this moment the effect that is subjected to movable grinding disc and fixed millstone room machine power of the fibre stuff by mill district produces metamorphosis, produces beating results, and beating results can change making beating intensity and realizes by regulating hydraulic pressure.
(4) withdrawing.When pressure descends because some burst factor causes slurry, the real-time pressure value that pressure transducer records is during less than the force value set, and controller sends the control signal of withdrawing; make the reversal valve action of hydraulic control system; make the movable grinding disc withdrawing, movable grinding disc leaves fixed millstone, thereby has protected disc mill.
(5) feed.When slurry pressure reaches or during greater than the force value set, controller will send the control signal of feed, make the reversal valve action on the hydraulic control system, make the movable grinding disc feed again, movable grinding disc makes disc mill be in the making beating state near fixed millstone.
The present invention compared with prior art has following advantage:
When interrupting because some burst factor causes slurry to carry; cause when the mill chamber interior is broken slurry; the control method of disc mill provided by the invention and the action of pulping process executive component thereof can make the movable grinding disc automatic withdrawal; thereby protected mill; frictional impact between the disc mill executive component that effectively prevents to cause because of disconnected slurry in the pulping process; thereby the protective disc grinding machine helps production safety.
Description of drawings
Fig. 1 is the disc mill structural representation;
Fig. 2 hydraulic control system schematic diagram;
Fig. 3 is embodiment 1 a slurry process flow diagram;
Fig. 4 is embodiment 2 slurry process flow diagrams.
Among the figure, 1: oil cylinder; 2: piston; 3: sleeve; 4: axle; 5: the movable grinding disc seat; 6: movable grinding disc; 7: fixed millstone; 8: the mill chamber; 9: solenoid directional control valve; 10: pilot operated compound relief valve; 11: oil pump; 12: tensimeter; 13: oil filter; 14: fuel tank; 15: valve; 16: the pulp-inlet pipe road; 17: pressure transducer; 18: the pulp pipeline.
Embodiment
Below in conjunction with drawings and Examples the present invention is done further concrete description, but the scope of protection of present invention is not limited to the scope that embodiment explains.
As shown in Figure 1, be provided with fixed millstone 7, movable grinding disc seat 5, movable grinding disc 6 in the mill chamber 8 of disc mill, movable grinding disc 6 places on the movable grinding disc seat 5, and movable grinding disc seat 5 is connected with axle 4, is with sleeve 3 on the axle 4, and sleeve 3 is fixedlyed connected with the piston 2 in the oil cylinder 1.
Embodiment 1
In the present embodiment, pressure transducer 17 installation sites as shown in Figure 3, pressure transducer is installed on the pulp-inlet pipe road 16.
(1) stock tank is full of slurry before mill, starts refining system and pulls an oar.Connect the power supply of disc mill control device, boot disk grinding machine hydraulic control system then starts main motor, and disc mill movable grinding disc 6 is rotated with axle 4.The pressure oil of hydraulic control system enters the left side of oil cylinder 1 through fuel tank 14, oil filter 13, oil pump 11, solenoid directional control valve 9, pressure oil promotes piston 2 and moves right, promoting sleeve 3 drive axles 4 moves right, movable grinding disc seat 5 and movable grinding disc 6 are moved right, movable grinding disc 6 leaves fixed millstone 7, be in the withdrawing state, to not making beating effect of slurry.
(2) then open valve 15 on the pulp-inlet pipe road 16, make slurry enter the mill chamber 8 of disc mill, behind overground district, enter grout outlet road 18 by the pulp-inlet pipe road.
(3) reach or during when the slurry pressure on the pulp-inlet pipe road greater than 0.3MPa, the pressure transducer 17 that is installed on the pulp-inlet pipe road sends force value to controller, controller sends the control signal of feed, make solenoid directional control valve 9 actions of hydraulic control system, the pressure oil of hydraulic control system enters the right side of oil cylinder 1 through oil pump 11, solenoid directional control valve 9, pressure oil promotes piston 2 and is moved to the left, driving movable grinding disc seat 5 and movable grinding disc 6 is moved to the left, make the movable grinding disc feed, movable grinding disc is near fixed millstone, and disc mill carries out making beating work.The pressure of fluid shows at tensimeter 12, can carry out scene or remote adjustment by pilot operated compound relief valve 10, to satisfy the needs of making beating intensity.
(4) when the slurry pressure on the pulp-inlet pipe road during less than 0.3MPa, the pressure transducer 17 that is installed on the pulp-inlet pipe road 16 sends force value to controller, controller sends the control signal of withdrawing, make solenoid directional control valve 9 actions of hydraulic control system, the pressure oil of hydraulic control system enters the left side of oil cylinder 1 through oil pump 11, solenoid directional control valve 9, and pressure oil promotes piston 2 and moves right, and drives Moving plate seat 5 and movable grinding disc 6 and moves right, make movable grinding disc 6 leave fixed millstone 7, make the movable grinding disc withdrawing.
Compare with the disc mill of existing band hydraulic control system; present embodiment is provided with pressure transducer on the pulp-inlet pipe road; control the electromagnetic switch valve events of hydraulic control system by the signal of pressure transducer; when interrupting because some burst factor causes slurry to carry; cause that when the mill chamber interior was broken slurry, slurry pressure descended, the present invention can make the movable grinding disc automatic withdrawal; thereby protected mill, protected disc mill.
Claims (5)
1. disc mill, comprise pulp-inlet pipe road, pulp pipeline, movable grinding disc, fixed millstone and hydraulic control system, hydraulic control system comprises reversal valve, it is characterized in that also comprising pressure transducer, the controller that links to each other with pressure transducer, described pressure transducer is arranged on the pulp-inlet pipe road or on the pulp pipeline, described reversal valve is controlled by the controller;
The control method of executive component action is as follows in the Disc Refiner Beating Process:
Be arranged on the pulp-inlet pipe road or the pressure transducer on the pulp pipeline sends the real-time pressure value to controller, when the real-time pressure value that records when pressure transducer meets or exceeds the force value of setting, and this moment, movable grinding disc was in the withdrawing state, controller sends the control signal of feed, make the movable grinding disc feed, movable grinding disc is near fixed millstone, and at this moment disc mill is in the making beating state;
The real-time pressure value that records when pressure transducer is during less than the force value set, and this moment, movable grinding disc was in the feed state, and controller sends the control signal of withdrawing, makes the movable grinding disc withdrawing, and movable grinding disc leaves fixed millstone.
2. disc mill according to claim 1 is characterized in that described reversal valve is solenoid directional control valve or electro-hydraulic directional valve.
3. disc mill according to claim 1 and 2 is characterized in that hydraulic control system comprises pilot operated compound relief valve, and hydraulic pressure is regulated by pilot operated compound relief valve.
4. disc mill according to claim 1 is characterized in that the action of executive component realizes by hydraulic control system, and the control signal that controller sends feed makes the reversal valve action of hydraulic control system, thereby makes the movable grinding disc feed; The control signal that controller sends withdrawing makes the reversal valve action of hydraulic control system, thereby makes the movable grinding disc withdrawing.
5. disc mill according to claim 4 is characterized in that the force value of setting is 0.3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102190861A CN101413223B (en) | 2008-11-14 | 2008-11-14 | Disc mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102190861A CN101413223B (en) | 2008-11-14 | 2008-11-14 | Disc mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101413223A CN101413223A (en) | 2009-04-22 |
| CN101413223B true CN101413223B (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102190861A Expired - Fee Related CN101413223B (en) | 2008-11-14 | 2008-11-14 | Disc mill |
Country Status (1)
| Country | Link |
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| CN (1) | CN101413223B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400406B (en) * | 2011-11-09 | 2014-02-26 | 华南理工大学 | Medium concentration hydraulic double disc stuff grinder |
| CN103734893B (en) * | 2013-12-13 | 2015-11-18 | 云南中烟再造烟叶有限责任公司 | A kind of tobacco sheet low-concentration slurrying control system and control method |
| CN108180941B (en) * | 2017-12-28 | 2020-05-08 | 上海烟草集团有限责任公司 | Method for monitoring abrasion degree of grinding disc on line |
| CN108486944B (en) * | 2018-04-28 | 2024-05-28 | 郑州运达造纸设备有限公司 | Cover structure of double-disc pulping machine |
| CN110328728A (en) * | 2019-07-24 | 2019-10-15 | 镇江中福马机械有限公司 | A kind of control mechanism for the feeding of defibrator mill |
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2008
- 2008-11-14 CN CN2008102190861A patent/CN101413223B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101413223A (en) | 2009-04-22 |
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Granted publication date: 20110427 Termination date: 20131114 |