CN103912528A - Calcium carbonate dry-grinding hydraulic system and control method thereof - Google Patents
Calcium carbonate dry-grinding hydraulic system and control method thereof Download PDFInfo
- Publication number
- CN103912528A CN103912528A CN201410127535.5A CN201410127535A CN103912528A CN 103912528 A CN103912528 A CN 103912528A CN 201410127535 A CN201410127535 A CN 201410127535A CN 103912528 A CN103912528 A CN 103912528A
- Authority
- CN
- China
- Prior art keywords
- pressure
- calcium carbonate
- hydraulic system
- oil
- mill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Crushing And Grinding (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention provides a calcium carbonate dry-grinding hydraulic system and a control method thereof. The calcium carbonate dry-grinding hydraulic system comprises an oil tank, an oil pump, a hydraulic cylinder, a millstone, a first reversing valve, a second reversing valve, a third reversing valve and a pressure sensor. The first reversing valve and the second reversing valve are connected between the oil pump and the hydraulic cylinder, so that the oil pump supplies oil to a first cavity of the hydraulic cylinder or a second cavity of the hydraulic cylinder. When the oil pump supplies oil to the second cavity and the millstone lowers, the pressure sensor measures the pressure in real time; when the measured pressure is smaller than a set upper limit, a first coil of the first reversing valve is electrified to allow the millstone to continuously lower; when the measured pressure is larger than the set upper limit, the first coil of the first reversing valve is power off and pressurizing is stopped; when the measured pressure is smaller than a set lower limit, the first coil of the first reversing valve is electrified to allow the millstone to continuously lower, and pressure supplementing is achieved; when the measured pressure is larger than the set lower limit, the millstone is in the state of pressure maintaining.
Description
Technical field
The present invention relates to pulp technology for making paper, particularly a kind of calcium carbonate dry grinding hydraulic system and controlling method thereof.
Background technique
Powdered whiting is one of indispensable filler in paper technology.After the techniques such as powdered whiting is marble through pulverizing, dry grinding, bubble slurry, wet-milling for papermaking technology, in dry grinding system, the rising of mill, decline all by HYDRAULIC CONTROL SYSTEM, in grinding process, mill will keep certain down force pressure, ensure that mill contacts completely with raw material, mill rotation, thus the stone of φ 45mm is ground to form to the powdered granule about 400 orders.
In existing dry grinding hydraulic pressure holding pressure control technology; lower piezoelectric magnet valve is electricly eternal; maintain pressure by pilot operated compound relief valve; simultaneity factor has a hydraulic pressure to push down mill (state of pressurization operation all the time) always; the limitation of this hydraulic system is that mill pressure modulability is poor; in the time that charging is inhomogeneous; cannot regulate in time mill pressure; abrasive disk abrasion is serious; main frame current fluctuation is large simultaneously; in the time that main frame motor current exceedes protection setting value, main frame frequency variator is understood overload protection and is caused equipment downtime, affects manufacturing efficiency.
Summary of the invention
The invention provides a kind of calcium carbonate dry grinding hydraulic system and controlling method thereof, cause equipment downtime to solve in prior art because mill pressure adjusting function is poor, easily cause main frame frequency variator to understand overload protection, affect the problem of manufacturing efficiency.
For solving the problems of the technologies described above, the technological scheme that the present invention adopts is: a kind of calcium carbonate dry grinding hydraulic system is provided, comprises:
Fuel tank, oil pump, described oil hydraulic cylinder, mill, the first selector valve, the second selector valve, the 3rd selector valve and pressure transducer;
Wherein, described oil hydraulic cylinder comprises cylinder body, piston and piston rod, described cylinder body is divided into the first cavity and the second cavity by described piston, described piston rod is connected with described piston, and the oil pressure of described piston based on described the first cavity and described the second cavity produces displacement and make described piston rod drive described mill to rise or decline;
Wherein, described the first selector valve and described the second selector valve are connected between described oil pump and described oil hydraulic cylinder, so that described oil pump is selectively to described the first cavity fuel feeding or to described the second cavity fuel feeding;
Wherein, in the time that described oil pump declines described mill to described the second cavity fuel feeding, the real-time pressure measurement of described pressure transducer,
In the time that institute's measuring pressure is less than upper limit set value, the first coil of described the first selector valve obtains the electric described mill continuation decline that makes,
In the time that institute's measuring pressure is greater than upper limit set value, the first coil losing electricity of described the first selector valve, described oil pump stops, to described the second cavity fuel feeding, stopping pressurization to play,
In the time that institute's measuring pressure is less than lower limit set value, the first coil of described the first selector valve obtains the electric described mill continuation decline that makes, and described oil pump continues to described the second cavity fuel feeding, to play ftercompction effect,
In the time that institute's measuring pressure is greater than described lower limit set value, described mill is in packing state.
According to one preferred embodiment of the present invention, described calcium carbonate dry grinding hydraulic system also comprises pressure relay, in the time that described mill declines, when oil pressure that described pressure relay is set higher than described pressure relay at the oil pressure of described the second cavity, control described the 3rd selector valve and commutate to carry out release.
According to one preferred embodiment of the present invention, described calcium carbonate dry grinding hydraulic system also comprises relief valve, and described relief valve is connected in oil hydraulic circuit, for controlling the input pressure of described oil cylinder.
According to one preferred embodiment of the present invention, described calcium carbonate dry grinding hydraulic system also comprises plate-type non-return valve, and described plate-type non-return valve is connected between described oil pump and described the first selector valve.
According to one preferred embodiment of the present invention, described calcium carbonate dry grinding hydraulic system also comprises Pilot operated check valve, and described Pilot operated check valve is connected between described the second selector valve and described the second cavity.
According to one preferred embodiment of the present invention, described calcium carbonate dry grinding hydraulic system also comprises accumulator, and described accumulator is connected with described the second cavity.
According to one preferred embodiment of the present invention, described calcium carbonate dry grinding hydraulic system also comprises cooler, and described cooler is connected between described oil cylinder and fuel tank, for cooling work oil return.
According to one preferred embodiment of the present invention, described calcium carbonate dry grinding hydraulic system also comprises oil-suction oil filter and return oil filter, described oil-suction oil filter is connected between described oil pump and described fuel tank, and described return oil filter is connected between described cooler and described fuel tank.
For solving the problems of the technologies described above, another technical solution used in the present invention is: the controlling method that a kind of calcium carbonate dry grinding hydraulic system is provided, the calcium carbonate dry grinding hydraulic system of the controlling method of described calcium carbonate dry grinding hydraulic system based on above-mentioned carried out, and comprises the following steps:
Start described calcium carbonate dry grinding hydraulic system;
Whether detect described mill high spacing;
If described mill not high spacing, is controlled the second coil and described second selector valve of described the first selector valve and obtained the electric described mill rising that makes, described mill is promoted to paramount height spacing;
High spacing if described mill is in, the first coil of controlling described the first selector valve obtains the electric described mill decline that makes;
Start main frame motor and make described mill rotation;
The real-time pressure measurement in the time that described mill declines of described pressure transducer;
In the time that institute's measuring pressure is less than described upper limit set value, the first coil of controlling described the first selector valve obtains the electric described mill continuation decline that makes;
In the time that institute's measuring pressure is greater than described upper limit set value, control the first coil losing electricity of described the first selector valve, described oil pump stops, to described the second cavity fuel feeding, stopping pressurization to play,
In the time that institute's measuring pressure is less than described lower limit set value, the first coil of controlling described the first selector valve obtains the electric described mill continuation decline that makes, and described oil pump continues to described the second cavity fuel feeding, to play ftercompction effect,
In the time that institute's measuring pressure is greater than described lower limit set value, described mill is in packing state.
According to one preferred embodiment of the present invention, after described startup main frame motor makes the step of mill rotation, also comprise step:
When oil pressure that described pressure relay is set higher than described pressure relay at the oil pressure of described the second cavity, control described the 3rd selector valve and commutate to carry out release.
The invention has the beneficial effects as follows: the situation that is different from prior art, calcium carbonate dry grinding hydraulic system provided by the invention and controlling method thereof are by pressure transducer real-time pressure measurement in the time that mill declines, carrying out intelligence according to the relativeness of institute's measuring pressure and lower limit set value and upper limit set value regulates, emery wheel is worked under voltage stabilizing state, there is automatic compensation and over-voltage protecting function, the hydraulic system that makes to dry grind operation is more stable, alleviate abrasive disk abrasion simultaneously, overcome the inhomogeneous main frame current fluctuation causing of charging, avoid main frame frequency variator meeting overload protection and cause equipment downtime, enhance productivity.
Brief description of the drawings
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing, wherein:
Fig. 1 is the element connection diagram of calcium carbonate dry grinding hydraulic system according to one preferred embodiment of the present invention;
Fig. 2 is the schematic flow sheet of calcium carbonate dry grinding hydraulic system control method according to one preferred embodiment of the present invention;
Fig. 3 is simplification control module schematic diagram according to one preferred embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment who obtains under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, Fig. 1 is the element connection diagram of calcium carbonate dry grinding hydraulic system according to one preferred embodiment of the present invention.
As shown in Figure 1, the calcium carbonate dry grinding hydraulic system that one embodiment of the present invention provides mainly comprises fuel tank 20, oil pump 5, oil hydraulic cylinder 31, mill 32, the first selector valve 12, the second selector valve 14, the 3rd selector valve 16 and pressure transducer 11.
Oil hydraulic cylinder 31 comprises cylinder body 311, piston 312 and piston rod 315, cylinder body 311 is divided into the first cavity 316 and the second cavity 317 by piston 312, one end of piston rod 315 is connected with piston 312, the other end of piston rod 315 is connected with mill 32, and the oil pressure of piston 312 based on the first cavity 316 and the second cavity 317 produces displacement and make piston rod 315 be with movable grinding disc 32 to rise or decline.
Wherein, the first selector valve 12 and the second selector valve 14 are connected between oil pump 5 and oil hydraulic cylinder 31, so that oil pump 5 is selectively to the first cavity 316 fuel feeding or to the second cavity 317 fuel feeding.
Particularly, the first selector valve 12 comprises the first coil YV01 and the second coil YV02, the first coil YV01 obtains when electric, the first selector valve 12 is intersection bilateral state, and PB mouth communicates, and AT mouth communicates, the second coil YV02 obtains when electric, the first selector valve 12 is parallel bilateral state, and PA mouth communicates, and BT mouth communicates.In the present embodiment, the A mouth of the second selector valve 14 is arranged to oil circuit cut-off, and when the coil YV04 of the second selector valve 14 must not electricity, BT mouth communicates, and the coil YV04 of the second selector valve 14 obtains PB mouth when electric and communicates.
In the time that oil pump 5 declines mill 32 to the second cavity 317 fuel feeding, the real-time pressure measurement of pressure transducer 11, in the time that institute's measuring pressure is less than upper limit set value, the first coil of the first selector valve 12 obtains the electric mill 32 that makes to be continued to decline, in the time that institute's measuring pressure is greater than upper limit set value, the first coil losing electricity of the first selector valve 12, oil pump 5 stops to the second cavity 317 fuel feeding, stop pressurization to play, in the time that institute's measuring pressure is less than lower limit set value, the first coil of the first selector valve 12 obtains the electric mill 32 that makes to be continued to decline, oil pump 5 continues to the second cavity 317 fuel feeding, to play ftercompction effect, in the time that institute's measuring pressure is greater than lower limit set value, mill 32 is in packing state.
Wherein, oil pump 5 is driven by motor 6.Pressure transducer 11 can be measured the multiple positions in system circuit, PT11.1 as shown in Figure 1 and PT11.2.
In addition the calcium carbonate dry grinding hydraulic system that, the preferred embodiment of the present invention provides also comprises pressure relay 13, relief valve 8, plate-type non-return valve 7, Pilot operated check valve 15, accumulator 19, cooler 9, oil-suction oil filter 1, return oil filter 2, liquid temperature level meter 3, air-strainer 4, safety valve 17 and high-pressure ball valve 18.
In the time that mill 32 declines, the coil YV03 that controls the 3rd selector valve 16 when oil pressure that pressure relay 13 is set higher than pressure relay 13 at the oil pressure of the second cavity 317 obtains electric commutation to carry out release.Particularly, in the present embodiment, the A mouth of the 3rd selector valve 16 is arranged to oil circuit cut-off, and when the coil YV03 of the 3rd selector valve 16 must not electricity, BT mouth communicates, and the coil YV03 of the 3rd selector valve 16 obtains PB mouth when electric and communicates.
Relief valve 8 is connected in oil hydraulic circuit, for controlling the input pressure of oil cylinder 32.Wherein, relief valve 8 can arrange the multiple positions in system circuit, relief valve 8.1, relief valve 8.2 as shown in Figure 1.
Plate-type non-return valve 7 is connected between oil pump 5 and the first selector valve 12, to ensure one-way flow, and provides back pressure.
Pilot operated check valve 15 is connected between the second selector valve 14 and the second cavity 317, to ensure one-way flow, and provides back pressure.
Accumulator 19 is connected with the second cavity 317, with storage system energy.
Cooler 9 is connected between oil cylinder 31 and fuel tank 20, for cooling work oil return.
Oil-suction oil filter 1 is connected between oil pump 5 and fuel tank 20, and return oil filter 2 is connected between cooler 9 and fuel tank 20, for filtering working oil.Liquid temperature level meter 3 is for measuring temperature and the liquid level of hydraulic oil.Air-strainer 4 plays air-filtering effect, prevents that airborne dust from entering fuel tank, and contaminated liquid force feed affects the each element work of hydraulic system.Safety valve 17 plays safety protection effect.High-pressure ball valve 18 for using in the time that maintenance is drained the oil.
Below in conjunction with the simple description of above element and the working principle of the calcium carbonate dry grinding hydraulic system that the preferred embodiment of the present invention provides is described in conjunction with Fig. 1.
1, system pressure is set up
Motor 6 drives after oil pump 5 runnings, and hydraulic oil enters the inlet port of oil pump 5 through inlet port filter 1, then is discharged by the oil drain out of oil pump 5, and through plate-type non-return valve 7, for past system, system pressure is set by relief valve 8.1.
2, mill 32 risings are controlled
When the second coil YV02 of the first selector valve 12 obtains when electric, the coil YV04 of the second selector valve 14 obtains electric simultaneously, Pilot operated check valve 15 is opened, the PA mouth of the first selector valve 12 communicates, and BT mouth communicates, and hydraulic oil enters the first cavity 316 of oil cylinder 31 through PA mouth, make mill 32 increase, relief valve 8.3 is controlled the input pressure of oil cylinder 31, and meanwhile, the hydraulic oil of the second cavity 317 of oil cylinder 31 flows back to fuel tank 20 through BT mouth, cooler 9 and return oil filter 2.
3, mill 32 declines are controlled
When the first coil YV01 of the first selector valve 12 obtains when electric, the PB mouth of the first selector valve 12 communicates, AT mouth communicates, hydraulic oil enters the second cavity 317 of oil cylinder 31 through PB mouth, mill 32 is declined, meanwhile, hydraulic oil flows back to fuel tank 20 from the first cavity 316 of oil cylinder 31 through AT mouth, cooler 9 and return oil filter 2.If the second cavity 317 oil pressure are higher than the setting pressure of pressure relay 13, pressure relay 13 sends signal, and the coil YV03 of the 3rd selector valve 16 obtains electric, carries out system unload, and this design shields to system.
4, mill 32 decline pressure holding function
When mill 32 presses down, pressure transducer PT11.1 detects down force pressure, and signal 4-20mA is passed to DCS(Distributed Control System, distributed control system), the engineering range that 4-20mA is corresponding is 0-250Bar.In the time that pressure is greater than 75Bar, the first coil YV01 dead electricity of the first selector valve 12, when pressure during lower than 65Bar the first coil YV01 of the first selector valve 12 obtain electric, thereby make system play pressure maintaining effect.Pressurize scope is adjustable according to actual conditions, is set and is generally at DCS by operator: 60Bar-80Bar.
See also Fig. 2, Fig. 2 is the schematic flow sheet of calcium carbonate dry grinding hydraulic system control method according to one preferred embodiment of the present invention.
The calcium carbonate dry grinding hydraulic system of the controlling method of the calcium carbonate dry grinding hydraulic system that the preferred embodiment of the present invention provides based on above-mentioned carried out, and comprises the following steps:
101, start calcium carbonate dry grinding hydraulic system;
102, whether detect mill 32 high spacing;
103,104, obtain the electric mill 32 that makes and rise if mill 32 high high not spacing, is controlled the second coil YV02 of the first selector valve 12 and the coil YV04 of the second selector valve 14, mill 32 is promoted to paramount height spacing;
105, high spacing if mill 32 is in, the first coil YV01 that controls the first selector valve 12 obtains the electric mill 32 that makes and declines;
106, start main frame motor mill 32 is rotated;
107, pressure transducer 11 is real-time pressure measurement in the time that mill 32 declines;
In the time that institute's measuring pressure is less than upper limit set value, return to step 105, the first coil YV01 that controls the first selector valve 12 obtains the electric mill 32 that makes to be continued to decline;
108, in the time that institute's measuring pressure is greater than upper limit set value, control the first coil YV01 dead electricity of the first selector valve 12, oil pump 5 stops, to the second cavity 317 fuel feeding, stopping pressurization to play,
109, in the time that institute's measuring pressure is less than lower limit set value, return to step 105, the first coil YV01 that controls the first selector valve 12 obtains the electric mill 32 that makes to be continued to decline, and oil pump 5 continues to the second cavity 317 fuel feeding, to play ftercompction effect,
110, in the time that institute's measuring pressure is greater than lower limit set value, mill 32 is in packing state.
In addition, in step 106, start after main frame motor makes step that mill 32 rotates, also comprise step:
111, when oil pressure that pressure relay 13 is set higher than pressure relay 13 at the oil pressure of the second cavity 317, control the 3rd selector valve 16 and commutate to carry out release.
See also Fig. 3, Fig. 3 is simplification control module schematic diagram according to one preferred embodiment of the present invention.
As shown in Figure 3, system is by PLC(programmable logic controller (PLC) system) control, PLC receive operator at OS(active station) input lower limit set value and upper limit set value, and receive the testing signal of pressure transducer 11 and pressure relay 13, then the first coil YV01 that exports control signal control the first selector valve 12, carries out corresponding step-down operation.
In sum, those skilled in the art easily understand, calcium carbonate dry grinding hydraulic system provided by the invention and controlling method thereof are by pressure transducer real-time pressure measurement in the time that mill declines, carrying out intelligence according to the relativeness of institute's measuring pressure and lower limit set value and upper limit set value regulates, emery wheel is worked under voltage stabilizing state, there is automatic compensation and over-voltage protecting function, the hydraulic system that makes to dry grind operation is more stable, alleviate abrasive disk abrasion simultaneously, overcome the inhomogeneous main frame current fluctuation causing of charging, avoid main frame frequency variator meeting overload protection and cause equipment downtime, enhance productivity.
These are only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a calcium carbonate dry grinding hydraulic system, is characterized in that, comprising:
Fuel tank (20), oil pump (5), described oil hydraulic cylinder (31), mill (32), the first selector valve (12), the second selector valve (14), the 3rd selector valve (16) and pressure transducer (11);
Wherein, described oil hydraulic cylinder (31) comprises cylinder body (311), piston (312) and piston rod (315), described cylinder body (311) is divided into the first cavity (316) and the second cavity (317) by described piston (312), described piston rod (315) is connected with described piston (312), and the oil pressure of described piston (312) based on described the first cavity (316) and described the second cavity (317) produces displacement and make described piston rod (315) drive described mill (32) to rise or decline;
Wherein, described the first selector valve (12) and described the second selector valve (14) are connected between described oil pump (5) and described oil hydraulic cylinder (31), so that described oil pump (5) is selectively to described the first cavity (316) fuel feeding or to described the second cavity (317) fuel feeding;
Wherein, in the time that described oil pump (5) declines described mill (32) to described the second cavity (317) fuel feeding, described pressure transducer (11) pressure measurement in real time,
In the time that institute's measuring pressure is less than upper limit set value, the first coil of described the first selector valve (12) obtains the electric described mill (32) that makes to be continued to decline,
In the time that institute's measuring pressure is greater than upper limit set value, the first coil losing electricity of described the first selector valve (12), described oil pump (5) stops, to described the second cavity (317) fuel feeding, stopping pressurization to play,
In the time that institute's measuring pressure is less than lower limit set value, the first coil of described the first selector valve (12) obtains the electric described mill (32) that makes to be continued to decline, and described oil pump (5) continues to described the second cavity (317) fuel feeding, to play ftercompction effect,
In the time that institute's measuring pressure is greater than described lower limit set value, described mill (32) is in packing state.
2. calcium carbonate dry grinding hydraulic system according to claim 1, it is characterized in that, described calcium carbonate dry grinding hydraulic system also comprises pressure relay (13), in the time that described mill (32) declines, when oil pressure that described pressure relay (13) is set higher than described pressure relay (13) at the oil pressure of described the second cavity (317), control described the 3rd selector valve (16) and commutate to carry out release.
3. calcium carbonate dry grinding hydraulic system according to claim 1 and 2, it is characterized in that, described calcium carbonate dry grinding hydraulic system also comprises relief valve (8), and described relief valve (8) is connected in oil hydraulic circuit, for controlling the input pressure of described oil cylinder (32).
4. calcium carbonate dry grinding hydraulic system according to claim 1 and 2, it is characterized in that, described calcium carbonate dry grinding hydraulic system also comprises plate-type non-return valve (7), and described plate-type non-return valve (7) is connected between described oil pump (5) and described the first selector valve (12).
5. calcium carbonate dry grinding hydraulic system according to claim 1 and 2, it is characterized in that, described calcium carbonate dry grinding hydraulic system also comprises Pilot operated check valve (15), and described Pilot operated check valve (15) is connected between described the second selector valve (14) and described the second cavity (317).
6. calcium carbonate dry grinding hydraulic system according to claim 1 and 2, is characterized in that, described calcium carbonate dry grinding hydraulic system also comprises accumulator (19), and described accumulator (19) is connected with described the second cavity (317).
7. calcium carbonate dry grinding hydraulic system according to claim 1 and 2, it is characterized in that, described calcium carbonate dry grinding hydraulic system also comprises cooler (9), and described cooler (9) is connected between described oil cylinder (31) and fuel tank (20), for cooling work oil return.
8. calcium carbonate dry grinding hydraulic system according to claim 7, it is characterized in that, described calcium carbonate dry grinding hydraulic system also comprises oil-suction oil filter (1) and return oil filter (2), described oil-suction oil filter (1) is connected between described oil pump (5) and described fuel tank (20), and described return oil filter (2) is connected between described cooler (9) and described fuel tank (20).
9. a controlling method for calcium carbonate dry grinding hydraulic system, is characterized in that, the calcium carbonate dry grinding hydraulic system of the controlling method of described calcium carbonate dry grinding hydraulic system based on described in any one in claim 1 to 8 carried out, and comprises the following steps:
Start described calcium carbonate dry grinding hydraulic system;
Whether detect described mill (32) high spacing;
If described mill (32) not high spacing, is controlled the second coil and described second selector valve (14) of described the first selector valve (12) and obtained electric described mill (32) rising that makes, described mill (32) is promoted to paramount height spacing;
If described mill (32) is in high spacing, the first coil of controlling described the first selector valve (12) obtains the electric described mill (32) that makes and declines;
Start main frame motor and make described mill (32) rotation;
Described pressure transducer (11) real-time pressure measurement in the time that described mill (32) declines;
In the time that institute's measuring pressure is less than described upper limit set value, the first coil of controlling described the first selector valve (12) obtains the electric described mill (32) that makes to be continued to decline;
In the time that institute's measuring pressure is greater than described upper limit set value, control the first coil losing electricity of described the first selector valve (12), described oil pump (5) stops, to described the second cavity (317) fuel feeding, stopping pressurization to play,
In the time that institute's measuring pressure is less than described lower limit set value, the first coil of controlling described the first selector valve (12) obtains the electric described mill (32) that makes to be continued to decline, and described oil pump (5) continues to described the second cavity (317) fuel feeding, to play ftercompction effect,
In the time that institute's measuring pressure is greater than described lower limit set value, described mill (32) is in packing state.
10. calcium carbonate dry grinding hydraulic system control method according to claim 9, is characterized in that,
After described startup main frame motor makes the step of mill (32) rotation, also comprise step:
When oil pressure that described pressure relay (13) is set higher than described pressure relay (13) at the oil pressure of described the second cavity (317), controlling described the 3rd selector valve (16) commutates to carry out release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410127535.5A CN103912528B (en) | 2014-03-31 | 2014-03-31 | Calcium carbonate dry grinding hydraulic system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410127535.5A CN103912528B (en) | 2014-03-31 | 2014-03-31 | Calcium carbonate dry grinding hydraulic system and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103912528A true CN103912528A (en) | 2014-07-09 |
| CN103912528B CN103912528B (en) | 2016-08-31 |
Family
ID=51038453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410127535.5A Active CN103912528B (en) | 2014-03-31 | 2014-03-31 | Calcium carbonate dry grinding hydraulic system and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103912528B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS594451A (en) * | 1982-06-14 | 1984-01-11 | スタン・アンデユストリイ | Vertical shaft type ball mill |
| 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 |
| CN101424285A (en) * | 2008-11-11 | 2009-05-06 | 上海宝田新型建材有限公司 | Hydraulic control method for COREX slag powder mill system |
| CN101543797A (en) * | 2009-04-29 | 2009-09-30 | 上海宝钢工程技术有限公司 | Vertical roller mill hydraulic system |
| US8360349B1 (en) * | 2003-06-06 | 2013-01-29 | Republic Machines, Inc. | Rotary grinder control system and method |
-
2014
- 2014-03-31 CN CN201410127535.5A patent/CN103912528B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS594451A (en) * | 1982-06-14 | 1984-01-11 | スタン・アンデユストリイ | Vertical shaft type ball mill |
| US8360349B1 (en) * | 2003-06-06 | 2013-01-29 | Republic Machines, Inc. | Rotary grinder control system and method |
| 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 |
| CN101424285A (en) * | 2008-11-11 | 2009-05-06 | 上海宝田新型建材有限公司 | Hydraulic control method for COREX slag powder mill system |
| CN101543797A (en) * | 2009-04-29 | 2009-09-30 | 上海宝钢工程技术有限公司 | Vertical roller mill hydraulic system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103912528B (en) | 2016-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205136165U (en) | Hydraulic pressure loading system | |
| CN108032202A (en) | A kind of sanding apparatus of component of machine | |
| CN104002225A (en) | Aluminum plate polishing machine | |
| CN103912528A (en) | Calcium carbonate dry-grinding hydraulic system and control method thereof | |
| CN204656707U (en) | Heavy calcium carbonate powder is produced and is used intelligent feed system | |
| CN103465158A (en) | Efficient peripheral continuous polishing machine | |
| CN204725333U (en) | The grinder of the uniform conveying such as a kind of lapping liquid | |
| CN109174406A (en) | A kind of high-molecular water paint raw mill plant | |
| CN106272004B (en) | A kind of Pneumatic constant pressure controlling stain-removing machine for track | |
| CN206416027U (en) | The planer-type conical surface surges grinder | |
| CN206344026U (en) | A kind of vacuum tank automatic draining device of many module switchings | |
| CN203017833U (en) | High pressure filter press with linked feed pressure and compacting pressure | |
| CN201720769U (en) | Water jet/water blasting machine | |
| CN102179286B (en) | Non-abrasion extrusion and grinding slurry pressure generation device and method | |
| CN206731294U (en) | A kind of micro-nano powder disperse mill based on PLC | |
| CN105457734A (en) | Grinder feeding system | |
| CN204584947U (en) | A kind of soft start abrasive disk | |
| CN105345246B (en) | Tungsten needle grinding mechanism based on robot welder | |
| CN203460049U (en) | Efficient periphery continuous polishing machine | |
| CN107420356A (en) | A kind of energy-saving hydraulic pumping plant for TRT fast cut valves | |
| CN208928162U (en) | A kind of cement grinding aid automatic adding device | |
| CN207879744U (en) | A kind of hydraulic synchronization speed regulation device of Vertical Mill | |
| CN206754017U (en) | A kind of energy-saving hydraulic pumping plant for TRT fast cut valves | |
| CN216463907U (en) | Constant pressure type wafer double-side grinding machine | |
| CN207287702U (en) | A kind of tcm and herbal slice production and processing lapping device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |