CN101543797A - Vertical roller mill hydraulic system - Google Patents
Vertical roller mill hydraulic system Download PDFInfo
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- CN101543797A CN101543797A CN200910050270A CN200910050270A CN101543797A CN 101543797 A CN101543797 A CN 101543797A CN 200910050270 A CN200910050270 A CN 200910050270A CN 200910050270 A CN200910050270 A CN 200910050270A CN 101543797 A CN101543797 A CN 101543797A
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Abstract
The invention relates to a vertical roller mill hydraulic system, which comprises a plurality of grinding roll clamping hydraulic cylinders, a plurality of accumulator groups, a hydraulic station and connecting pipelines among the grinding roll clamping hydraulic cylinders, the accumulator groups and the hydraulic station, wherein the hydraulic station comprises an oil tank device, an oil pump device, a grinding roll clamping control valve group and connecting pipelines among the oil tank device, the oil pump device and the grinding roll clamping control valve group; a feedline of the oil pump device is connected with an inlet of the grinding roll clamping control valve group; an oil pump motor supplies oil for the grinding roll clamping control valve group; an outlet of the grinding roll clamping control valve group is connected with piston rod cavities of the grinding roll clamping hydraulic cylinders and the accumulator groups; rodless cavities of the grinding roll clamping hydraulic cylinders are connected with the grinding roll clamping control valve group through a plurality of oil return pipes; the grinding roll clamping control valve group controls the telescoping of piston rods of the grinding roll clamping hydraulic cylinders through a plurality of electromagnetic directional valves; and the accumulator groups absorb the vibration of the grinding roll clamping hydraulic cylinders respectively. The vertical roller mill hydraulic system solves the problem of loaded pressure boost of the system and improves the service life of grinding rolls and grinding discs and the maintenance efficiency.
Description
Technical field
The present invention relates to industry and make Hydraulic Field, particularly a kind of vertical roller mill hydraulic system that is used for metallurgy industry slag powders grinding production line.
Background technology
The slag vertical roll grinder has three roll shape formulas, four roll shape formulas and six roll shape formulas etc. both at home and abroad at present, and the vertical roller mill hydraulic system of various types has nothing in common with each other.
Adopt plunger case pattern that grinding roller is pressurizeed as this four roll shapes formula vertical grinder hydraulic system of uncle power turtledove, by two duplex pumps directly to four oil cylinder fuel feeding.Have the valve piece that security of system pressure is set on the pump group, the valve piece that has set pressure in the pump discharge bypass, each oil cylinder pressure side is furnished with an accumulator and safety valve group thereof, its operation principle is: behind the pump start, when the pressure of four hydraulic cylinders all reaches pump discharge bypass set pressure value, close bypass, chain grinding roller limit switch of while, system just pressurizes to grinding roller; When system pressure reached setting pressure, oil pump quit work.
The shortcoming of this hydraulic system is: contact mill before the grinding roller pressurization, and the hydraulic pressure system regiment commander is carried pressurization, has influenced the service life of equipment; Aspect the impact shock of eliminating vertical mill, the blowing pressure of accumulator is a unique value, can not change according to the difference of material feeding situation; During the maintenance grinding roller, need the accumulator safety valve pressure of earlier artificial unloading cylinder side, hang out oil cylinder again, change at last or the maintenance grinding roller, operation is many, and the time is long.
Summary of the invention
The object of the present invention is to provide a kind of improved vertical roller mill hydraulic system, the band that it has solved prior art carries the pressurization problem, and when grinding roller contact material, hydraulic system is just to the grinding roller pressurization, and system lifted grinding roller fast after material feeding finished; Grinding roller can not contact all the time with mill in whole process of production, has improved the service life of grinding roller and mill.
Technical solution of the present invention is as follows:
A kind of vertical roller mill hydraulic system, it comprises several grinding roller clamping hydraulic cylinders (A), several accumulator groups (45), it also comprises a Hydraulic Station and the connecting line between them;
Described Hydraulic Station comprises that a tank mounting, an oil pump device, a grinding roller clamp control valve group (C) and the connecting line between them;
The oil feed line of described oil pump device links to each other with the inlet (P1) that grinding roller clamps the control valve group, clamp control valve group fuel feeding by the Oil pump electrical machinery (8) in the oil pump device to grinding roller, described grinding roller clamps the oil return (T1, T2) of control valve group and leaks hydraulic fluid port (DR) and is connected with tank mounting respectively;
Described grinding roller clamps the rod end chamber and the accumulator group of outlet (P2) the connection grinding roller clamping hydraulic cylinder (A) of control valve group (C), the rodless cavity of grinding roller clamping hydraulic cylinder (A) connects grinding roller by several return lines (H1, H2, H3) and clamps control valve group (C), grinding roller clamps control valve group (C) and controls the flexible of grinding roller clamping hydraulic cylinder (A) piston rod by several solenoid directional control valves (25), and described accumulator group absorbs the vibration of grinding roller clamping hydraulic cylinder (A) respectively.
The present invention takes following further technical measures:
Described hydraulic system also comprises: a maintenance oil cylinder (B), and its rodless cavity is connected the two outlet oil circuits (PH, PR) that grinding roller clamps the control valve group respectively with rod end chamber, and the oil feed line of oil pump links to each other with the two outlet oil circuits (PH, PR) that grinding roller clamps the control valve group.
Described hydraulic system also comprises: a maintenance oil cylinder hand-operated valve group (42), be arranged on two oil circuits that export between the oil circuits (PH, PR) of maintenance oil cylinder (B) and grinding roller clamping control valve group, and rise and the decline loop with control maintenance oil cylinder (B).
Be respectively equipped with a balanced valve piece (37) on two oil circuits of described maintenance oil cylinder (B), in order to guarantee the steady of maintenance oil cylinder (B) run action.
Described accumulator group (45) is made up of bag type accumulator, with the impact shock of elimination vertical roll grinder and the pressure fluctuation of vertical roller mill hydraulic system itself.
Described hydraulic system also comprises: a pressure sensor (35), be connected on the hydraulic system, clamping force when at any time grinding roller being pressurizeed is monitored, and optionally send analog quantity and instruct PLC, and the action of each solenoid directional control valve in the chain vertical roller mill hydraulic system.
Preferably, the quantity of described grinding roller clamping hydraulic cylinder is three, and the quantity of described accumulator group is six, and the corresponding rod end chamber that connects a grinding roller clamping hydraulic cylinder of per two accumulator groups is to absorb vibration.
Preferably, described maintenance oil cylinder, maintenance oil cylinder hand-operated valve group and grinding roller clamp between the control valve group and are connected respectively with snap joint with high-pressure hose.
The present invention makes it compared with prior art owing to adopted above technical scheme, has the following advantages and positive effect:
1, the present invention is when grinding roller contact material, and hydraulic system just to the grinding roller pressurization, has solved system's band and carried the pressurization problem; Material feeding finishes, and system lifts grinding roller fast; Grinding roller can not contact all the time with mill, has improved the service life of grinding roller and mill.
2, the present invention adopts three piston cylinders that grinding roller is pressurizeed, and oil cylinder stroke is short, and it is very fast with the roller speed that falls to lift roller, has fully adapted to the rhythm of big production.
3, the present invention sets different charging pressure of accumulator according to the difference of material, makes hydraulic system have the effect that good elimination is impacted, vibrated and pulse.
4, the present invention by the control of system to the maintenance fluid cylinder pressure, realizes the dismounting and the installation of grinding roller when the maintenance grinding roller, has improved maintenance efficiency.
5, hydraulic system is except the required rising of grinding roller action, descent direction control loop among the present invention, and also the reliable request of stable equipment operation is realized in buffer loop, overload and relief circuit, speed control loop by pressure dwelling loop, speed accelerating circuits, accumulator and the balanced loop that prevents hydraulic cylinder deadweight causing stall.
Description of drawings
Fig. 1 is the formation schematic diagram of a kind of vertical roller mill hydraulic system of the present invention.
Fig. 2 is the enlarged diagram of solenoid directional control valve 20 in Fig. 1 hydraulic system.
The specific embodiment
Specifically introduce a preferred embodiment of the present invention below in conjunction with accompanying drawing.
Referring to Fig. 1, the present invention is a kind of vertical roller mill hydraulic system, it is made up of three grinding roller clamping hydraulic cylinder A, six accumulator groups 45, Hydraulic Station and the connecting line between them, and Hydraulic Station clamps control valve group C by a tank mounting, oil pump device, grinding roller and the connecting line between them is formed.The corresponding rod end chamber that connects a grinding roller clamping hydraulic cylinder A of per two accumulator groups selects for use bag type accumulator as accumulator group 45 in the present embodiment, be used for eliminating the pressure fluctuation of the impact shock and the vertical roller mill hydraulic system itself of vertical roll grinder.
The oil feed line of the oil pump device in the Hydraulic Station links to each other with the inlet P1 that grinding roller clamps control valve group C, clamp control valve group C fuel feeding by the Oil pump electrical machinery 8 in the oil pump device to grinding roller, grinding roller clamps oil return inlet T 1, the T2 of control valve group C and leaks hydraulic fluid port DR and is connected with tank mounting respectively.Be connected pressure sensor 35 on the hydraulic system clamping force when at any time grinding roller being pressurizeed and monitor, optionally send analog quantity and instruct PLC, and the action of each solenoid directional control valve in the chain vertical roller mill hydraulic system.
Grinding roller clamps rod end chamber and the accumulator group 45 of the outlet P2 connection grinding roller clamping hydraulic cylinder A of control valve group C, the rodless cavity of grinding roller clamping hydraulic cylinder A connects grinding roller by three return line H1, H2, H3 and clamps control valve group C, and grinding roller clamps control valve group C by solenoid directional control valve 25
1, 25
2, 26 and 27 control grinding roller clamping hydraulic cylinder A piston rod flexible.When the clamping hydraulic cylinder was depressed, P2 was the in-line of grinding roller clamping hydraulic cylinder A, and H1, H2, H3 are return line.When the clamping hydraulic cylinder lifted, H1, H2, H3 were the in-line of grinding roller clamping hydraulic cylinder A, and P2 is a return line.
The rodless cavity of maintenance oil cylinder B is connected two outlet oil circuit PH, the PR that grinding roller clamps the control valve group respectively with rod end chamber, and the oil feed line of oil pump links to each other with two outlet oil circuit PH, PR that grinding roller clamps control valve group C.During work, PH is a pressure piping, and PR then communicates with return line.On two oil circuits of maintenance oil cylinder B a balanced valve piece 37 is set respectively, in order to guarantee the steady of maintenance oil cylinder B run action.Maintenance oil cylinder hand-operated valve group 42 is arranged on maintenance oil cylinder B and grinding roller clamps on two oil circuits that export between oil circuit PH, the PR of control valve group C, and B rises and the decline loop with control maintenance oil cylinder.When the maintenance oil cylinder was depressed, H1 was an in-line, and R1 is a return line.When the maintenance oil cylinder lifted, R1 was an in-line, and H1 is a return line.
The present invention realizes the dismounting and the installation of grinding roller by maintenance oil cylinder hand-operated valve group 42.Maintenance oil cylinder B, maintenance oil cylinder hand-operated valve group 42 and grinding roller clamp the connected mode that adopts high-pressure hose and snap joint between the control valve group C.
Bag type accumulator has played the effect of liquid spring in process of production, is used for eliminating the impact shock of vertical mill and the pressure fluctuation of hydraulic system itself.When the granularity of material surpasses regulation and requires or wherein be mixed with the higher impurity of hardness, grinding roller will be forced to lift, and the pressure oil in the clamping hydraulic cylinder enters in the accumulator rapidly; After the grinding roller pressure roller was crossed foreign material, the pressure oil in the accumulator was supplied with hydraulic cylinder again rapidly by the effect of air bag, made the pressure of grinding roller recover normal, proceeded milling operation, made vertical mill system stable operation.Simultaneously, bag type accumulator can also play the effect of pressurize.
The workflow of vertical roller mill hydraulic system of the present invention is as follows:
1, before the native system master electric motor starting, starts Oil pump electrical machinery 8, the electromagnet b of solenoid directional control valve 20 (referring to Fig. 2) energising simultaneously, solenoid directional control valve 25
1Switch on 26 electromagnet, the rodless cavity oil-feed of grinding roller clamping hydraulic cylinder A, the rod end chamber oil return makes grinding roller rising (chain with limit switch).
2, before reinforced, Oil pump electrical machinery 8 is out of service, and the only electromagnet of solenoid directional control valve 26 energising makes grinding roller remain on a high position (chain with limit switch), waits for feeding.
3, during feeding, start Oil pump electrical machinery 8 once more, the electromagnet a of solenoid directional control valve 20 energising simultaneously, solenoid directional control valve 26 and 27 electromagnet energising, the plunger shaft oil-feed of grinding roller clamping hydraulic cylinder A, the rodless cavity oil return makes grinding roller drop to the raw material platform.
When 4, grinding roller contacted material, Oil pump electrical machinery 8 was in service, in the electromagnet a of solenoid directional control valve 20 energising simultaneously, and electromagnetism solenoid directional control valve 26 and 27 electromagnet dead electricity, system's pressurization, operating pressure raises.
5, normal work period, the data presentation system pressure that pressure sensor 35 records then stops Oil pump electrical machinery 8 in setting range, the whole dead electricity of the electromagnet of all electromagnetism solenoid directional control valves, system needs pressurize.
6, normal work period increases as outer load, and the data presentation system pressure that pressure sensor 35 records rises to setting range when above, solenoid directional control valve 25
1Electromagnet energising, the plunger shaft pressure of grinding roller clamping hydraulic cylinder A discharges, system pressure descends; The data presentation system pressure that records as pressure sensor 35 drops to setting range when following, starts Oil pump electrical machinery 8 once more, and the electromagnet a of solenoid directional control valve 20 switches on once more simultaneously, and then grinding roller pressurizes once more, and system pressure raises once more.
7, after feeding stops, starting Oil pump electrical machinery 8, the electromagnet b of solenoid directional control valve 20 energising simultaneously, solenoid directional control valve 25
2With 26 electromagnet energising, the rodless cavity oil-feed of grinding roller clamping hydraulic cylinder A, and rod end chamber formation differential circuit make the grinding roller fast rise; Subsequently, Oil pump electrical machinery 8 is in service, in the electromagnet b energising of solenoid directional control valve 20, and while solenoid directional control valve 25
2The electromagnet dead electricity, solenoid directional control valve 25
1Electromagnet energising, grinding roller rises to a high position (chain with limit switch) at a slow speed.
8, after grinding machine master motor stopped, Oil pump electrical machinery 8 was out of service, simultaneously solenoid directional control valve 25
1Electromagnet continue energising, the electromagnet energising of solenoid directional control valve 27, grinding roller is by deadweight decline.
Native system is opened manual ball valve 16 when maintenance of equipment or replacing grinding roller, the hand-operated direction valve by on the operating maintenance oil cylinder hand-operated valve group 42 makes the maintenance cylinder action, lifts or put down grinding roller.
In summary, use vertical roller mill hydraulic system of the present invention, when grinding roller contact material, hydraulic system just to the grinding roller pressurization, has solved system's band and has carried the pressurization problem; Material feeding finishes, and system lifts grinding roller fast; Grinding roller can not contact all the time with mill, has improved the service life of grinding roller and mill, and the production efficiency height, and is easy to maintenance, stable, reliable, fully adapted to the rhythm of big production.
Certainly, those skilled in the art in the present technique field will be appreciated that, the foregoing description only is to be used for illustrating the present invention, and be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claim of the present invention conversion, the modification of the foregoing description.
Claims (6)
1. vertical roller mill hydraulic system, it comprises several grinding roller clamping hydraulic cylinders (A), several accumulator groups (45) is characterized in that it also comprises a Hydraulic Station and the connecting line between them;
Described Hydraulic Station comprises that a tank mounting, an oil pump device, a grinding roller clamp control valve group (C) and the connecting line between them;
The oil feed line of described oil pump device links to each other with the inlet (P1) that grinding roller clamps the control valve group, clamp control valve group fuel feeding by the Oil pump electrical machinery (8) in the oil pump device to grinding roller, described grinding roller clamps the oil return opening (T1, T2) of control valve group and leaks hydraulic fluid port (DR) and is connected with tank mounting respectively;
Described grinding roller clamps the rod end chamber and the accumulator group of outlet (P2) the connection grinding roller clamping hydraulic cylinder (A) of control valve group (C), the rodless cavity of grinding roller clamping hydraulic cylinder (A) connects grinding roller by several return lines (H1, H2, H3) and clamps control valve group (C), grinding roller clamps control valve group (C) and controls the flexible of grinding roller clamping hydraulic cylinder (A) piston rod by several solenoid directional control valves (25), and described accumulator group absorbs the vibration of grinding roller clamping hydraulic cylinder (A) respectively.
2. vertical roller mill hydraulic system according to claim 1, it is characterized in that, described hydraulic system also comprises: a maintenance oil cylinder (B), its rodless cavity is connected the two outlet oil circuits (PH, PR) that grinding roller clamps the control valve group respectively with rod end chamber, and the oil feed line of oil pump links to each other with the two outlet oil circuits (PH, PR) that grinding roller clamps the control valve group.
3. vertical roller mill hydraulic system according to claim 2, it is characterized in that, described hydraulic system also comprises: a maintenance oil cylinder hand-operated valve group (42), be arranged on two oil circuits that export between the oil circuits (PH, PR) of maintenance oil cylinder (B) and grinding roller clamping control valve group, rise and the decline loop with control maintenance oil cylinder (B).
4. vertical roller mill hydraulic system according to claim 2 is characterized in that: be respectively equipped with a balanced valve piece (37) on two oil circuits of described maintenance oil cylinder (B), in order to guarantee the steady of maintenance oil cylinder (B) run action.
5. vertical roller mill hydraulic system according to claim 1 is characterized in that: described accumulator group (45) is made up of bag type accumulator, with the impact shock of elimination vertical roll grinder and the pressure fluctuation of vertical roller mill hydraulic system itself.
6. vertical roller mill hydraulic system according to claim 1, it is characterized in that, described hydraulic system also comprises: a pressure sensor (35), be connected on the hydraulic system, clamping force when at any time grinding roller being pressurizeed is monitored, optionally send analog quantity and instruct PLC, and the action of each solenoid directional control valve in the chain vertical roller mill hydraulic system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100502702A CN101543797B (en) | 2009-04-29 | 2009-04-29 | Vertical roller mill hydraulic system |
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| CN2009100502702A CN101543797B (en) | 2009-04-29 | 2009-04-29 | Vertical roller mill hydraulic system |
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| CN101543797A true CN101543797A (en) | 2009-09-30 |
| CN101543797B CN101543797B (en) | 2010-10-13 |
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| CN102233288A (en) * | 2011-07-18 | 2011-11-09 | 成都利君实业股份有限公司 | Hydraulic system for rolling machine (high-pressure roller mill) |
| CN102824938A (en) * | 2012-08-23 | 2012-12-19 | 南京西普水泥工程集团有限公司 | Hydraulic turning device for vertical mill |
| CN103394391A (en) * | 2013-07-20 | 2013-11-20 | 长兴山润机械有限公司 | Hydraulic system of roll crusher |
| CN103912528A (en) * | 2014-03-31 | 2014-07-09 | 金东纸业（江苏）股份有限公司 | Calcium carbonate dry-grinding hydraulic system and control method thereof |
| CN104074817A (en) * | 2014-07-04 | 2014-10-01 | 江苏鹏飞集团股份有限公司 | Hydraulic control system of four-roller vertical slag mill grinding roller |
| CN104675773A (en) * | 2015-03-06 | 2015-06-03 | 浙江大学 | Pure water hydraulic system of roller press for precisely controlling rolling speed and method of pure water hydraulic system for precisely controlling rolling speed |
| CN104944326A (en) * | 2014-10-14 | 2015-09-30 | 江苏大峘集团有限公司 | Hydraulic roll ascending system for grinding rolls of vertical mills |
| CN105903536A (en) * | 2016-04-12 | 2016-08-31 | 李奇峰 | Vertical milling pressurization station |
| CN106423529A (en) * | 2016-08-31 | 2017-02-22 | 江苏羚羊水泥工程技术有限公司 | Hydraulic control system for vertical grinding machine and control method |
| CN109482275A (en) * | 2017-09-10 | 2019-03-19 | 南京梅山冶金发展有限公司 | Based on pressure controling mode control crusher to the method and device of roller spacing |
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| JP3962670B2 (en) * | 2002-10-25 | 2007-08-22 | 株式会社アーステクニカ | Hydraulic circuit of a rotary crusher and control method of the hydraulic circuit |
| CN2805926Y (en) * | 2005-07-07 | 2006-08-16 | 北京中冶迈克液压有限责任公司 | Hydraulic pressurization system of vertical mill |
| CN201006445Y (en) * | 2007-02-15 | 2008-01-16 | 辽阳新力源电站矿山设备有限公司 | Large-scale upright rollmill capsule type hydraulic cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102233288B (en) * | 2011-07-18 | 2014-05-14 | 成都利君实业股份有限公司 | Hydraulic system for rolling machine (high-pressure roller mill) |
| CN102233288A (en) * | 2011-07-18 | 2011-11-09 | 成都利君实业股份有限公司 | Hydraulic system for rolling machine (high-pressure roller mill) |
| CN102824938A (en) * | 2012-08-23 | 2012-12-19 | 南京西普水泥工程集团有限公司 | Hydraulic turning device for vertical mill |
| CN103394391A (en) * | 2013-07-20 | 2013-11-20 | 长兴山润机械有限公司 | Hydraulic system of roll crusher |
| CN103394391B (en) * | 2013-07-20 | 2015-10-28 | 长兴山润机械有限公司 | A kind of hydraulic system of roll crusher |
| CN103912528B (en) * | 2014-03-31 | 2016-08-31 | 金东纸业（江苏）股份有限公司 | Calcium carbonate dry grinding hydraulic system and control method thereof |
| CN103912528A (en) * | 2014-03-31 | 2014-07-09 | 金东纸业（江苏）股份有限公司 | Calcium carbonate dry-grinding hydraulic system and control method thereof |
| CN104074817A (en) * | 2014-07-04 | 2014-10-01 | 江苏鹏飞集团股份有限公司 | Hydraulic control system of four-roller vertical slag mill grinding roller |
| CN104074817B (en) * | 2014-07-04 | 2017-01-25 | 江苏鹏飞集团股份有限公司 | Hydraulic control system of four-roller vertical slag mill grinding roller |
| CN104944326A (en) * | 2014-10-14 | 2015-09-30 | 江苏大峘集团有限公司 | Hydraulic roll ascending system for grinding rolls of vertical mills |
| CN104675773A (en) * | 2015-03-06 | 2015-06-03 | 浙江大学 | Pure water hydraulic system of roller press for precisely controlling rolling speed and method of pure water hydraulic system for precisely controlling rolling speed |
| CN105903536A (en) * | 2016-04-12 | 2016-08-31 | 李奇峰 | Vertical milling pressurization station |
| CN106423529A (en) * | 2016-08-31 | 2017-02-22 | 江苏羚羊水泥工程技术有限公司 | Hydraulic control system for vertical grinding machine and control method |
| CN109482275A (en) * | 2017-09-10 | 2019-03-19 | 南京梅山冶金发展有限公司 | Based on pressure controling mode control crusher to the method and device of roller spacing |
| CN109482275B (en) * | 2017-09-10 | 2020-12-11 | 南京梅山冶金发展有限公司 | Method and device for controlling distance between pair rollers of crusher based on pressure control mode |
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| CN101543797B (en) | 2010-10-13 |
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Owner name: BAOSTEEL ENGINEERING + TECHNOLOGY GROUP CO., LTD. Free format text: FORMER OWNER: SHANGHAI BAOSTEEL ENGINEERING + TECHNOLOGY CO., LTD Effective date: 20100701 |
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Effective date of registration: 20100701 Address after: 201900 Shanghai city Baoshan District Tieli Road No. 2510 Applicant after: Baosteel Engeneering &Technology Group Co., Ltd. Address before: 201900 Shanghai city Baoshan District Tieli Road No. 2510 Applicant before: Shanghai Baogang Engineering Technology Co., Ltd. |
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Assignee: Baosteel Suzhou Metallurgy Heavy & Industry Co., Ltd. Assignor: Baosteel Engeneering &Technology Group Co., Ltd. Contract record no.: 2011310000025 Denomination of invention: Vertical roller mill hydraulic system Granted publication date: 20101013 License type: Exclusive License Open date: 20090930 Record date: 20110325 |