CN104772186B - Roll gap is kept and the control method of non-resistance starting before a kind of four-roller crusher is switched on - Google Patents
Roll gap is kept and the control method of non-resistance starting before a kind of four-roller crusher is switched on Download PDFInfo
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- CN104772186B CN104772186B CN201510143158.9A CN201510143158A CN104772186B CN 104772186 B CN104772186 B CN 104772186B CN 201510143158 A CN201510143158 A CN 201510143158A CN 104772186 B CN104772186 B CN 104772186B
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- valve
- roller
- electromagnetism
- rodless cavity
- oil cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
Roll gap is kept before being switched on the invention discloses a kind of four-roller crusher and the control method of non-resistance starting is on original hydraulic circuit, the rodless cavity for the oil cylinder for driving dynamic roller mobile and rod chamber end increase separately a set of hydraulic circuit, rodless cavity end increases by an electromagnetism on-off valve, one termination rodless cavity of valve, the other end take back fuel tank pipeline.Rod chamber end increases by a check valve, and the one of valve is terminated with rod cavity, and the other end takes back fuel tank pipeline.To main motor startup stage after four-roller crusher shutdown, electromagnetism on-off valve keeps logical state.When four-roller crusher operates normally, electromagnetism on-off valve keeps disconnected state.Four roller apparatus operate normally when, such as detection discovery have blocking phenomenon, then electromagnetism on-off valve can be made to keep logical state immediately, drive mobile roller oil cylinder keep can move back can not into " floating ", blocking phenomenon can be excluded rapidly.After blocking phenomenon excludes, then electromagnetism on-off valve can be made to keep disconnected state immediately, drive the oil cylinder " floating " of mobile roller to disappear and restore normal roll gap to four roller apparatus and run well.
Description
Technical field
The present invention relates to a kind of four-roller crusher, in particular to roll gap holding and non-resistance before a kind of four-roller crusher is switched on
The control method of starting.
Background technique
Four-roller crusher is during a kind of metallurgical and mining equipment is matched, product fine crushing, can be by adjusting the roll gap of upper and lower roll
Gap, the material of granularity needed for being crushed has compact-sized, takes up little area, the features such as big yield of reduction ratio is higher.
General kibbler roll is equivalent to a pair roller of motor drive, crusher chamber is formed between two rollers, material is through roll gap
It is discharged after broken, is mainly used for being crushed brittleness spy material without high hardness, such as coke, raw coal, sinter.The 4 of four-roller crusher
A roller is divided into two groups up and down, uses in pairs.For upper roller for rough and torn, lower roll is used for thin broken, one of fixing roller in each pair of roller
Opposite rack is fixed, and the bearing block at another mobile roller both ends is fixed with two hydraulic cylinders respectively, and can be moved in the slide of rack
It is dynamic, to realize the adjusting of roll gap.
When general four-roller crusher operation, the drive cylinder for moving up and down roller locks substantially, and upper roller is seamed fixed and is maintained at
Between 3 to 6 ㎜, lower roller gap sets and is maintained between 1 to 2 ㎜, and after shutdown or before booting, upper and lower roll is required to move back roller
Operation increases roll gap.Otherwise in main motor startup stage, the material being mingled with roller is generated due to too small to the gap between roller
Extruding, the very big resistance of start is caused to roller, cause main motor startup stage jump electricity.
Summary of the invention
The purpose of the present invention is keep and without hindrance to solve the above problems, providing roll gap before a kind of four-roller crusher is switched on
The control method of power starting.
In order to achieve the above object, the invention provides the following technical scheme: roll gap is kept before a kind of four-roller crusher is switched on
And the control method of non-resistance starting, device include hydraulic basic control loop, the pressure for including the dynamic roller oil cylinder of connection driving
The circuit of the compositions such as table, electromagnetism on-off valve, check valve, electromagnetism on-off valve are connected with rodless cavity and oil return box pipeline, pressure gauge
It is connect with rodless cavity.Check valve is connected with rod chamber and oil return box pipeline, and the device further includes increasing at rodless cavity end
One electromagnetism on-off valve, a termination rodless cavity of valve, the other end take back fuel tank pipeline, and rod chamber end increases by a check valve, and the one of valve
Rod chamber is terminated, the other end takes back fuel tank pipeline；Its specific control method includes the following steps:
(1) after four-roller crusher is shut down, electromagnetism on-off valve keeps logical effect, the rodless cavity for the oil cylinder for driving dynamic roller mobile
It unloads and is depressed into pressure gauge and shows " 0 ", piston rod can retreat static after 1 to 2 ㎜；
(2) main motor startup stage, electromagnetism on-off valve keep logical effect, and the rodless cavity for the oil cylinder for driving dynamic roller mobile unloads
Pressure gauge is depressed into show " 0 ", piston rod keep can move back can not into quick condition；
(3) main motor start completion, after roller normal rotation, electromagnetism on-off valve restores to disconnected state, former hydraulic pressure system
System works normally.
The utility model has the advantages that
The advantages of control method of the invention is: using beam hanger piston rod " floating " technology, four-roller crusher is being switched on
Before, restart main motor without roller is first moved back, the upper and lower gap values between rollers to roller of four-roller crusher are protected substantially when no matter running or shutting down
It holds constant, reduces the use of hydraulic system and the abrasion of equipment, after shortening booting, above and below to roller gap value adjustment and extensive
The multiple time, boot program is simplified, has been automatically brought into operation conducive to nobody.
Meanwhile when four roller apparatus operate normally, such as detection discovery has blocking phenomenon, then electromagnetism on-off valve can be made to protect immediately
Hold logical state, drive mobile roller oil cylinder keep can move back can not into " floating ", blocking phenomenon can be excluded rapidly.Blocking phenomenon
After exclusion, then electromagnetism on-off valve can be made to keep disconnected state immediately, the oil cylinder " floating " of mobile roller is driven to disappear and restore normal
Roll gap to four roller apparatus run well.
Detailed description of the invention
Attached drawing 1 is a kind of schematic diagram for the control method that roll gap is kept and non-resistance starts before four-roller crusher is switched on.
Each component in figure are as follows:
1. 2. fixing roller of mobile roller
3. 4. hydraulic lock of mobile roller drive cylinder
5. 6. solenoid directional control valve of proportional reversing valve
7. 8. electromagnetism on-off valve of pressure gauge
9. check valve.
Specific embodiment
Technical solution provided by the invention is described in detail below with reference to specific embodiment, it should be understood that following specific
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.
As shown in Fig. 1, attached drawing 1 is the control method that roll gap is kept and non-resistance starts before a kind of four-roller crusher is switched on
Schematic diagram.Including the original being made of mobile roller 1, fixing roller 2, oil cylinder 3, hydraulic lock 4, proportional reversing valve 5 and solenoid directional control valve 6
The basic hydraulic circuit having.The composition of the basic hydraulic circuit is the prior art, and details are not described herein.A kind of four-roller crusher is opened
Before machine roll gap keep and non-resistance starting control method schematic diagram further include rodless cavity pressure gauge 7, with rodless cavity and return
Electromagnetism on-off valve 8 that fuel tank pipeline is connected, the check valve 9 being connected with rod chamber and oil return box pipeline.
After four-roller crusher is shut down, electromagnetism on-off valve 8 keeps logical effect, and the rodless cavity for the oil cylinder for driving dynamic roller mobile unloads
It is depressed into pressure gauge 7 and shows " 0 ".Piston rod can retreat static after 1 to 2 ㎜.
Main motor startup stage, electromagnetism on-off valve 8 keep logical effect, and the rodless cavity for the oil cylinder 3 for driving dynamic roller mobile unloads
Be depressed into pressure gauge 7 and show " 0 ", under the action of check valve 9, piston rod keep can moving back can not into quick condition, main motor is rigid
Startup stage, this state are conducive to absorb that mobile roller 1 and fixing roller 2 formed to the material being mingled between roller because between roller
Gap it is too small and generate extruding caused by resistance, absorb resistance principle be: drag effect caused by extruding on dynamic roller 1,
Dynamic roller 1 acts on the piston rod of oil cylinder 3, is connected due to no pressure because of the rodless cavity of oil cylinder 3 with oil return box pipe, then the work of oil cylinder 3
The oil of stopper rod automatic backing under active force, 3 rodless cavity of oil cylinder is discharged by electromagnetism on-off valve 8, meanwhile, 3 rod chamber of oil cylinder is logical
Check valve 9 is crossed from fuel tank oil suction, so that 3 piston rod of oil cylinder is in quick condition always, this quick condition actively eliminates main electricity
Resistance when machine starts, main motor can smoothly start in the case where actively not moving back roller.
Main motor start completion, after roller normal rotation, electromagnetism on-off valve 8 restores to disconnected state, former mobile roller 1,
Fixing roller 2, oil cylinder 3, hydraulic lock 4, the original hydraulic system that proportional reversing valve 5, solenoid directional control valve 6 form work normally.
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution consisting of any combination of the above technical features.
Claims (1)
1. roll gap is kept before a kind of four-roller crusher is switched on and the control method of non-resistance starting, device include that connection driving is dynamic
The circuit that the hydraulic basic control loop of roller oil cylinder, pressure gauge, electromagnetism on-off valve, check valve form, electromagnetism on-off valve and no bar
Chamber is connected with oil return box pipeline, and pressure gauge is connect with rodless cavity, and check valve is connected with rod chamber and oil return box pipeline, special
Sign is: the device further includes increasing by an electromagnetism on-off valve at rodless cavity end, and the one of electromagnetism on-off valve terminates rodless cavity, separately
One end takes back fuel tank pipeline, and rod chamber end increases by a check valve, and the one of check valve is terminated with rod cavity, and the other end takes back tank tube
Road；Its specific control method includes the following steps:
(1) after four-roller crusher is shut down, electromagnetism on-off valve keeps logical effect, the rodless cavity release for the oil cylinder for driving dynamic roller mobile
It is shown " 0 " to pressure gauge, piston rod can retreat static after 1 to 2 ㎜；
(2) main motor startup stage, electromagnetism on-off valve keep logical effect, and the rodless cavity for the oil cylinder for driving dynamic roller mobile, which unloads, to be depressed into
Pressure gauge shows " 0 ", piston rod keep can moving back can not into quick condition；
(3) main motor start completion, after roller normal rotation, electromagnetism on-off valve restores to disconnected state, and original hydraulic system is just
Often work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510143158.9A CN104772186B (en) | 2015-03-30 | 2015-03-30 | Roll gap is kept and the control method of non-resistance starting before a kind of four-roller crusher is switched on |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510143158.9A CN104772186B (en) | 2015-03-30 | 2015-03-30 | Roll gap is kept and the control method of non-resistance starting before a kind of four-roller crusher is switched on |
Publications (2)
| Publication Number | Publication Date |
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| CN104772186A CN104772186A (en) | 2015-07-15 |
| CN104772186B true CN104772186B (en) | 2019-07-16 |
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| CN201510143158.9A Active CN104772186B (en) | 2015-03-30 | 2015-03-30 | Roll gap is kept and the control method of non-resistance starting before a kind of four-roller crusher is switched on |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882823A (en) * | 2016-09-30 | 2018-04-06 | 南京梅山冶金发展有限公司 | Overcome the hydraulic control system of the harmful concussion of four-roller crusher oil cylinder |
| 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 |
| CN112718099B (en) * | 2020-09-14 | 2022-04-05 | 北京乐冶液压气动设备技术有限公司 | Constant roll gap double-roll crusher control system based on electro-hydraulic servo control |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1230675A1 (en) * | 1984-05-25 | 1986-05-15 | Labkovskij Boris A | Double-roll crusher drive |
| JPS62138902U (en) * | 1986-02-24 | 1987-09-02 | ||
| DE3815002A1 (en) * | 1988-05-03 | 1989-11-16 | Krupp Polysius Ag | GOOD BED ROLL 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 |
| CN201502586U (en) * | 2009-09-28 | 2010-06-09 | 江苏科行环境工程技术有限公司 | Hydraulic circuit of horomill |
| CN102155442B (en) * | 2011-03-18 | 2013-07-31 | 湖南工程学院 | Control loop of adjustable hydraulic loader |
| 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) |
| CN202447130U (en) * | 2011-11-28 | 2012-09-26 | 中冶长天国际工程有限责任公司 | Driving device for single-roller crusher |
| CN104088823A (en) * | 2014-06-30 | 2014-10-08 | 洛阳天信重工机械有限公司 | Four-roller breaker hydraulic control system |
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