CN112808382B - Roll gap fine adjustment device, crusher and crusher roll gap control method - Google Patents
Roll gap fine adjustment device, crusher and crusher roll gap control method Download PDFInfo
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- CN112808382B CN112808382B CN202110002055.6A CN202110002055A CN112808382B CN 112808382 B CN112808382 B CN 112808382B CN 202110002055 A CN202110002055 A CN 202110002055A CN 112808382 B CN112808382 B CN 112808382B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
The invention relates to a roll gap fine-adjustment device, a crusher and a crusher roll gap control method, wherein the roll gap fine-adjustment device comprises an adjustment mechanism, the adjustment mechanism is used for acting on at least one working roll to enable the working roll to be bent and deformed towards the direction of the other working roll matched with the working roll, so that the roll gap reduction amount of the middle position of the two working rolls is larger than that of the two side positions; in the application process, the roll gap fine-tuning device can improve the problem that the difference between the middle roll gap and the two side roll gaps of the two working rolls is too large by enabling at least one of the two working rolls to be bent and deformed, the middle roll gap is reduced to enable the middle roll gap and the two side roll gaps to be consistent, the adjustment of the distance between the two working rolls is easier to follow-up and direct, the accuracy is higher, the problem that the two working rolls collide with each other is difficult to occur, the problem that the granularity distribution of finished products is unqualified due to the fact that the middle roll gap caused by abrasion is large can be improved, and the service life of the working rolls is prolonged.
Description
Technical Field
The invention relates to the technical field of crushers, in particular to a roll gap fine adjustment device, a crusher and a crusher roll gap control method.
Background
The crusher is matched particle crushing equipment in metallurgical mining equipment, can crush coarse particles by adjusting a gap (roll gap) between two rollers to obtain materials with required granularity, and has the characteristics of compact structure, small occupied area, large crushing ratio and the like.
In the working process of the crusher, along with the extension of the running time, the crushing roller increases the roll gap due to abrasion, so that the granularity of a finished product exceeds the range of qualified products. The usual method is to adjust the spacing of the crushing rolls so that they re-meet the roll gap requirements. However, in actual use, since the material is not uniformly distributed along the axial direction of the roller but is concentrated in the middle of the roller where the material is thrown, the abrasion degree in the middle of the roller is higher than that in the two edges, as shown in fig. 1, the crushing rollers 1 and 2 are saddle-shaped because the middle part is abraded more and the two ends are abraded less or not. In this case, the problem of the increase in the roll gap due to wear cannot be solved by adjusting the distance between the crushing rolls. Because the abrasion degrees of the middle part and the two ends of the crushing roller are different, if only the roller gap between the middle parts of the two crushing rollers is considered to adjust the distance between the roller shafts, the two ends of the two rollers can collide; and if only two ends are considered, the middle roll gap is still too large to meet the requirement, and the accuracy of the adjustment of the roll gap is influenced.
Disclosure of Invention
The invention aims to provide a roll gap fine-adjustment device to solve the problems of high roll gap adjustment difficulty and low accuracy caused by inconsistent axial wear degrees of crushing rolls.
The second purpose of the invention is to provide a crusher based on the roll gap fine-tuning device and a crusher roll gap control method.
In order to achieve the purpose, the invention provides the following technical scheme:
a roll gap fine-adjustment device is used for enabling roll gaps between two mutually matched working rolls to tend to be consistent along the axial direction of the working rolls and comprises an adjusting mechanism, wherein the adjusting mechanism is used for acting on at least one working roll to enable the working roll to bend and deform towards the direction of the other working roll matched with the working roll, so that the roll gap reduction amount of the middle position of the two working rolls is larger than that of the two side positions.
Preferably, the adjusting mechanism comprises two adjusting units, the two adjusting units are symmetrically arranged and act on at least one bearing seat at two ends of the working roll respectively, the adjusting unit comprises at least two telescopic mechanisms, the two mutually symmetrical telescopic mechanisms at two ends of the working roll are a group of synchronous actions, and each group of telescopic mechanisms are used for acting according to different directions and/or strokes so as to enable the working roll to be bent and deformed.
Preferably, two ends of each telescopic mechanism of the adjusting unit are respectively connected with bearing seats at corresponding ends of the two working rolls which are matched with each other.
Preferably, the adjusting unit comprises an even number of the telescopic mechanisms, and each telescopic mechanism is symmetrically arranged about the transverse middle section of the bearing seat.
Preferably, the telescopic mechanism is a hydraulic cylinder.
A crusher, comprising:
at least one pair of cooperating crushing rolls;
the roll gap fine adjustment device as claimed in any one of the preceding claims, wherein the roll gap fine adjustment device is adapted to adjust the roll gap between at least one pair of cooperating crushing rolls.
Preferably, the crusher further comprises a finished product particle size distribution online detection system, and the control system of the crusher controls the roll gap fine-tuning device to act according to a preset instruction according to a detection signal of the finished product particle size distribution online detection system.
Preferably, the finished product particle size distribution online detection system comprises an image acquisition device and an analysis device, the image acquisition device is used for acquiring a finished product image at the outlet of the crusher, the analysis device is used for analyzing the finished product image to obtain finished product particle size distribution information, and the control system of the crusher controls the roll gap fine-tuning device to act according to a preset instruction according to the finished product particle size distribution information.
Preferably, still include protection casing and lighting device, the protection casing set up in between the export of breaker and finished product conveyor, lighting device and image acquisition device set up in the protection casing.
A crusher roll gap control method comprising:
1) detecting the particle size distribution information of the finished product at the outlet of the crusher in real time, if the particle size distribution information of the finished product meets the process requirement, keeping the current working state, and if the particle size distribution information of the finished product does not meet the process requirement, entering the step 2);
2) controlling the roll gap fine-tuning device to act to enable at least one crushing roll to bend and deform so as to narrow the middle part of the roll gap of a pair of crushing rolls, controlling the roll gap fine-tuning device to stop acting if the finished product granularity distribution information meets the process requirement, and entering step 3 if the roll gap fine-tuning device reaches the limit state and the finished product granularity distribution information does not meet the process requirement;
3) reducing the roll gap until the granularity distribution information of the finished product meets the process requirement;
4) and (5) repeating the steps 1) to 3) until the crushing operation is finished.
According to the technical scheme, the invention discloses a roll gap fine-tuning device for enabling the roll gap between two mutually matched working rolls to tend to be consistent along the axial direction of the working rolls, which comprises an adjusting mechanism, wherein the adjusting mechanism is used for acting on at least one working roll to enable the working roll to bend and deform towards the direction of the other working roll matched with the working roll, so that the roll gap reduction amount of the middle position of the two working rolls is larger than that of the two side positions; in the application process, the roll gap fine adjustment device can improve the problem that the difference between the middle roll gap and the two side roll gaps of the two working rolls is too large by enabling at least one of the two working rolls to be bent and deformed, the middle roll gap is reduced to enable the middle roll gap and the two side roll gaps to be consistent, the subsequent direct adjustment of the distance between the two working rolls is easier to carry out, the accuracy is higher, the problem that the two working rolls collide with each other is difficult to occur, the problem that the distribution of the granularity of finished products is unqualified due to the fact that the middle roll gap caused by abrasion is large can be improved, and the service life of the working rolls is prolonged.
The invention also provides a crusher based on the roll gap fine-tuning device and a crusher roll gap control method.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a worn crushing roller;
FIG. 2 is a schematic view of an assembly structure of a roll gap fine-tuning device provided in an embodiment of the present invention;
FIG. 3 is a schematic view of an operating structure of a roll gap fine adjustment device according to an embodiment of the present invention;
fig. 4 is a schematic partial structural diagram of a crusher according to an embodiment of the present invention.
Wherein:
1. 2 is a working roll; 3. 4, 5 and 6 are hydraulic cylinders; 7 is a crusher; 8. 9, 10 and 11 are bearing seats; 12 is a lighting device; 13 is a protective cover; 14 is an image acquisition device; and 15, an analysis device.
Detailed Description
One of the cores of the invention is to provide a roll gap fine-tuning device to achieve the purposes of improving the problems of large roll gap adjusting difficulty and low accuracy caused by inconsistent axial wear degrees of crushing rolls and improving the consistency of the particle size distribution of finished products.
The invention also provides a crusher based on the roll gap fine-tuning device and a roll gap control method of the crusher.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is an assembly structure diagram of a roll gap fine-tuning device according to an embodiment of the present invention.
The embodiment of the invention discloses a roll gap fine-tuning device for enabling the roll gap between two mutually matched working rolls 1 and 2 to tend to be consistent along the axial direction of the working rolls, which comprises an adjusting mechanism, wherein the adjusting mechanism is used for acting on at least one working roll to enable the working roll to bend and deform towards the direction of the other working roll matched with the working roll, so that the roll gap reduction amount of the middle position of the two working rolls is larger than that of the two side positions, the adjusting mechanism acts on the two ends of the working roll, and the working roll is bent and deformed by applying pushing force or pulling force, so that the problem that the roll gap in the middle of the two working rolls is larger than that of the two sides due to abrasion is solved, the working rolls comprise but not limited to a rolling roll and a crushing roll, and the adjusting mechanism comprises but not limited to a hydraulic cylinder, a motor and gear mechanism, a motor and a worm gear mechanism.
Compared with the prior art, in the application process of the roll gap fine-tuning device provided by the embodiment of the invention, the roll gap fine-tuning device can solve the problem that the difference between the roll gap in the middle of the two working rolls and the roll gaps on the two sides is overlarge by bending at least one of the two working rolls, reduce the roll gap in the middle to enable the roll gap to be consistent with the roll gaps on the two sides, and enable the subsequent adjustment of the distance between the two working rolls directly to be easier, the accuracy to be higher, the problem that the two working rolls collide with each other to be difficult to occur, the problem that the granularity distribution of a finished product is unqualified due to the large roll gap in the middle caused by abrasion to be solved, and the service life of the working rolls to be prolonged.
Preferably, in an embodiment of the present invention, the adjusting mechanism acts on two ends of the work roll to cause bending deformation of the work roll, and specifically, the adjusting mechanism includes two adjusting units, the two adjusting units are symmetrically arranged and act on bearing seats at two ends of at least one work roll respectively, the adjusting unit includes at least two telescoping mechanisms, the two telescoping mechanisms may be all located on the same side of the work roll or may be respectively arranged on two sides of the work roll, the two telescoping mechanisms symmetrically arranged at two ends of the work roll form a group of synchronous actions, and each group of telescoping mechanisms is used for acting in different directions and/or strokes to cause bending deformation of the work roll.
Specifically, the telescopic mechanism may be a hydraulic cylinder, or the telescopic mechanism may be a rotating motor and a transmission mechanism, the transmission mechanism is used for converting the rotation of the rotating motor into linear motion, and the transmission mechanism includes, but is not limited to, a worm gear and a worm, and a gear rack.
According to the technical scheme, the two ends of each telescopic mechanism of the adjusting unit are respectively connected with the bearing seats at the corresponding ends of the two mutually matched working rolls, so that the adjusting mechanism simultaneously drives the two mutually matched working rolls to generate opposite bending deformation, and the problem of large middle roll gap caused by abrasion can be better solved.
The roll gap fine-tuning device in the above embodiment can not only deform the working rolls, but also adjust the distance between the two working rolls by making the telescopic mechanisms of the adjusting unit move in the same direction.
Furthermore, the adjusting unit comprises an even number of telescopic mechanisms, each telescopic mechanism is symmetrically arranged relative to a transverse middle section of the bearing seat, and the transverse middle section is a section which is perpendicular to a middle shaft of the bearing seat and divides the bearing seat into two equal parts, so that the stress at two ends of the bearing seat is uniform, the acting force of the adjusting mechanism does not generate unbalance loading on the bearing seat, and the service life of the bearing seat is prolonged.
Specifically, as shown in fig. 2 and 3, the adjusting mechanism includes two adjusting units respectively disposed between two corresponding ends of the two work rolls, each adjusting unit includes two hydraulic cylinders, i.e., four hydraulic cylinders numbered 3, 4, 5, and 6 in the drawing, wherein two ends of the hydraulic cylinders 3 and 4 are respectively connected to the bearing blocks 8 and 9 of a pair of corresponding ends of the two work rolls, and the distance L from the hydraulic cylinders 3 and 4 to the transverse middle section plane of the bearing block 8 or 9 is equal to the distance L between the hydraulic cylinders 3 and 4 and the transverse middle section plane of the bearing block 8 or 9 1 ＝L 2 Two ends of the hydraulic cylinders 5 and 6 are respectively connected with bearing seats 10 and 11 at the other pair of corresponding ends of the two working rolls, and the distance L between the hydraulic cylinders 5 and 6 and the transverse middle section of the bearing seat 10 or 11 3 ＝L 4 。
In another embodiment, the adjusting mechanism may include a telescopic device and a pressure roller, the telescopic device includes, but is not limited to, a hydraulic cylinder, a rotating motor and a transmission device, the pressure roller is rotatably disposed at a front end of the telescopic device, the pressure roller rotates along with the rotation of the work roller, and the telescopic device presses the pressure roller against a middle position of the work roller to cause the pressure roller to bend and deform.
Embodiments of the present invention also provide a crusher 7, the crusher 7 comprising at least one pair of cooperating crushing rollers and a roll gap fine adjustment device as described above, the roll gap fine adjustment device being configured to adjust a roll gap between the at least one pair of cooperating crushing rollers.
As shown in fig. 4, in an embodiment of the present invention, the crushing rollers include a pair of coarse crushing rollers and a pair of fine crushing rollers, the pair of fine crushing rollers is disposed directly below the pair of coarse crushing rollers, and a roll gap of the pair of fine crushing rollers is smaller than that of the pair of coarse crushing rollers.
Preferably, the crusher further comprises a finished product particle size distribution online detection system, the control system of the crusher controls the roll gap fine-tuning device to act according to a preset instruction according to a detection signal of the finished product particle size distribution online detection system, and closed-loop control is formed by the finished product particle size distribution online detection system, the control system and the roll gap fine-tuning device.
Specifically, the finished product particle size distribution online detection system comprises an image acquisition device 14 and an analysis device 15, wherein the image acquisition device 14 is used for acquiring a finished product image at the outlet of the crusher, the image acquisition device 14 includes but is not limited to an industrial camera, the analysis device 15 is used for analyzing and processing the finished product image to obtain finished product particle size distribution information, and a control system of the crusher controls the roll gap fine-tuning device to act according to a preset instruction according to the finished product particle size distribution information.
Further optimize above-mentioned technical scheme, breaker 7 still includes protection casing 13 and lighting device 12, and protection casing 13 sets up between the export of breaker 7 and finished product conveyor, and lighting device 12 and image acquisition device 14 set up in protection casing 13, and lighting device 12 is used for providing the illumination for image acquisition device 14.
Based on the roll gap fine-tuning device and the crusher, the embodiment of the invention also provides a crusher roll gap control method, which comprises the following steps:
s1: detecting the particle size distribution information of the finished product at the outlet of the crusher in real time, if the particle size distribution information of the finished product meets the process requirements, keeping the current working state, and if the particle size distribution information of the finished product does not meet the process requirements, entering step S2;
s2: controlling the roll gap fine-tuning device to act to enable at least one crushing roll to bend and deform so as to narrow the middle part of the roll gap of a pair of crushing rolls, if the finished product granularity distribution information meets the process requirement, controlling the roll gap fine-tuning device to stop acting, and if the roll gap fine-tuning device reaches the limit state, the finished product granularity distribution information still does not meet the process requirement, entering the step S3;
s3: reducing the roll gap until the granularity distribution information of the finished product meets the process requirement;
s4: and repeating the step S1 to the step S3 until the crushing operation is finished.
The step S3 can be implemented by a roll gap adjusting mechanism additionally disposed on the crusher, or can be directly implemented by a roll gap fine-tuning device provided in an embodiment of the present invention, taking fig. 2 and fig. 3 as an example, when the hydraulic cylinders 3 and 6 extend to the limit and/or the hydraulic cylinders 4 and 5 shorten to the limit during the operation of the crushing roller, the acting directions of the hydraulic cylinders 3 and 6 need to be adjusted, so that the four hydraulic cylinders simultaneously generate acting forces inward, and the size of the roll gap is adjusted greatly to ensure the granularity of the finished product.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A roll gap fine-tuning device is used for enabling the roll gap between two mutually matched working rolls to tend to be consistent along the axial direction of the working rolls, characterized by comprising an adjusting mechanism, wherein the adjusting mechanism is used for acting on at least one working roll to enable the working roll to bend and deform towards the direction of the other working roll matched with the working roll, so that the reduction amount of the roll gap at the middle position of the two working rolls is larger than that at the two sides, the adjusting mechanism comprises two adjusting units which are symmetrically arranged and respectively act on bearing seats at two ends of at least one working roll, the adjusting unit comprises at least two telescopic mechanisms, the two telescopic mechanisms which are mutually symmetrical at the two ends of the working roll act synchronously in one group, and each group of telescopic mechanisms is used for acting according to different directions and/or strokes so as to enable the working roll to be bent and deformed.
2. The roll gap fine-tuning device according to claim 1, wherein two ends of each telescopic mechanism of the adjusting unit are respectively connected with bearing seats at corresponding ends of two mutually matched working rolls.
3. A roll gap fine-adjustment device according to claim 1 or 2, characterized in that the adjustment unit comprises an even number of the telescopic mechanisms, and each of the telescopic mechanisms is symmetrically arranged with respect to the transverse middle section of the bearing housing.
4. A roll gap trimming apparatus according to claim 1 or claim 2, wherein the telescopic mechanism is a hydraulic cylinder.
5. A crusher, characterized by comprising:
at least one pair of cooperating crushing rollers;
the fine roll gap adjustment apparatus of any one of claims 1 to 4, wherein the fine roll gap adjustment apparatus is adapted to adjust the roll gap between at least one pair of cooperating crushing rolls.
6. The crusher according to claim 5, further comprising a finished product particle size distribution on-line detection system, wherein the control system of the crusher controls the roll gap fine-tuning device to act according to a predetermined command according to a detection signal of the finished product particle size distribution on-line detection system.
7. The crusher according to claim 6, wherein the finished product particle size distribution on-line detection system comprises an image acquisition device and an analysis device, the image acquisition device is used for acquiring an image of a finished product at an outlet of the crusher, the analysis device is used for analyzing the image of the finished product to obtain information of finished product particle size distribution, and a control system of the crusher controls the roll gap fine-tuning device to act according to a preset instruction according to the information of finished product particle size distribution.
8. The crusher of claim 7, further comprising a protective cover disposed between the crusher's outlet and the product conveyor, and an illumination device disposed within the protective cover.
9. A crusher roll gap control method, comprising:
1) detecting the particle size distribution information of the finished product at the outlet of the crusher in real time, if the particle size distribution information of the finished product meets the process requirement, keeping the current working state, and if the particle size distribution information of the finished product does not meet the process requirement, entering the step 2);
2) controlling the roll gap fine-tuning device to act to enable at least one crushing roll to bend and deform so as to narrow the middle part of the roll gap of a pair of crushing rolls, controlling the roll gap fine-tuning device to stop acting if the finished product granularity distribution information meets the process requirement, and entering step 3 if the roll gap fine-tuning device reaches the limit state and the finished product granularity distribution information does not meet the process requirement;
3) reducing the roll gap until the granularity distribution information of the finished product meets the process requirement;
4) and (5) repeating the steps 1) to 3) until the crushing operation is finished.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002055.6A CN112808382B (en) | 2021-01-04 | 2021-01-04 | Roll gap fine adjustment device, crusher and crusher roll gap control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002055.6A CN112808382B (en) | 2021-01-04 | 2021-01-04 | Roll gap fine adjustment device, crusher and crusher roll gap control method |
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| CN112808382A CN112808382A (en) | 2021-05-18 |
| CN112808382B true CN112808382B (en) | 2022-08-16 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116786202B (en) * | 2023-07-10 | 2024-04-30 | 中建材（合肥）粉体科技装备有限公司 | Real-time detection system and detection method for throughput of roller press |
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| CN111167549A (en) * | 2019-12-26 | 2020-05-19 | 张金桃 | Roller type crushing device |
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| CN208483014U (en) * | 2018-06-12 | 2019-02-12 | 大连富地重工机械制造有限公司 | A kind of roll gap adjustment equipment |
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| CN1229698A (en) * | 1998-03-20 | 1999-09-29 | Sms舒路曼-斯玛公司 | Roller for rolling mill |
| EP1166879A1 (en) * | 2000-06-09 | 2002-01-02 | AMB Anlagen Maschinen Bau GmbH | Device and method for comminuting bulky, household and industrial refuse and the like |
| CN101018623A (en) * | 2004-09-14 | 2007-08-15 | Sms迪马格股份公司 | Convex roll used for influencing the profile and flatness of a milled strip |
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