roll mill

Abstract

Roller mill relates to the technical field of crushing equipment, including a plurality of first roller mill assemblies and second roller mill assemblies which are alternately stacked from top to bottom, when the material is in the first roller mill assembly, the material moves from the periphery to the center, when the material is in the second roller mill assembly, the material moves from the center to the periphery, the order between the uppermost first roller mill assembly and the second roller mill assembly and the order between the lowermost first roller mill assembly and the second roller mill assembly can be adjusted. The present application solves the problem that in the traditional roller mill, although the material which is not crushed to the target particle size can be crushed again under the influence of the material throwing disc and the rising airflow, the airflow still brings the large particles which cannot be moved to slowly deposit at the bottom.

Description

Technical Field

[0001] This invention relates to the field of crushing equipment technology, specifically to roller mills. Background Technology

[0002] Ring grinding rollers are a type of grinding equipment commonly used for grinding materials such as ores, coal, and cement. Their working principle primarily involves the friction and extrusion between the ring roller and the grinding disc to grind the material into powder of the desired particle size.

[0003] A prior art patent, CN210187306U, discloses a ring grinding roller mill, including a cylinder, a grading mechanism, a grinding roller mechanism, a material throwing mechanism, and a drive mechanism. The grading mechanism can generate a variable-speed spiral upward airflow while simultaneously impacting, squeezing, and grinding the material, reducing energy consumption and improving grading accuracy. By using a discharge block above the material throwing disc to rotate relative to the ground material, the material on the disc is pushed out, preventing a large amount of material from accumulating on the disc due to friction between materials, thus avoiding uneven material throwing and blockage in the grinding channel, which would affect the normal operation of the ring grinding roller mill and improve work efficiency.

[0004] With use, existing devices, including those mentioned above, have gradually revealed shortcomings in this technology, mainly in the following aspects:

[0005] First, although existing crushing equipment has the effect of a throwing disc and rising airflow, which can crush particles that have not been crushed to the target particle size again, there will still be large particles that the airflow cannot carry away and slowly settle at the bottom.

[0006] Secondly, the mutual squeezing between the grinding wheel and the side wall grinding disc plays a grinding role, but due to the influence of gravity, some material is not completely ground and falls directly from the gap of the grinding wheel to the bottom of the cavity, forming a deposit.

[0007] Third, the gap between the grinding wheel and the side wall grinding disc will gradually increase as the equipment is used, resulting in unqualified particle size. Therefore, the worn parts should be replaced regularly.

[0008] Fourth, the grinding device uses belt drive, which has low energy efficiency. Although the integrated classification mechanism reduces the total cost of the equipment to a certain extent, it also reduces the accuracy of powder precision control.

[0009] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0010] In view of the shortcomings of the prior art, the present invention solves the problem in the traditional roller mill that, although the material throwing disc and the rising airflow can further crush particles that have not been crushed to the target particle size, there are still large particles that cannot be carried by the airflow that slowly settle at the bottom.

[0011] To address the above problems, the present invention provides the following technical solution:

[0012] The roller mill includes several first roller mill components and second roller mill components that are alternately stacked from top to bottom. When the material is in the first roller mill component, the material moves from the outer periphery to the center; when the material is in the second roller mill component, the material moves from the center to the outer periphery. The order between the topmost first roller mill component (1) and the second roller mill component (2) and the bottommost first roller mill component (1) and the second roller mill component (2) is adjustable.

[0013] As an optimized solution, the first roller mill assembly and the second roller mill assembly are detachably connected.

[0014] As an optimized solution, the first roller mill assembly includes a first cylindrical shell, the bottom of which is connected to a first grinding roller groove plate. Several first grinding rollers are arranged inside the first cylindrical shell around the center, and the roller surfaces of the first grinding rollers rub against the first grinding roller groove plate.

[0015] As an optimized solution, each of the first grinding rollers is pressurized onto the first grinding roller groove plate by an elastic component.

[0016] As an optimized solution, a central discharge hole is provided in the center of the first grinding roller groove plate, and a first scraper is provided in the area between adjacent first grinding rollers, rotating around the center of the first cylinder shell, to guide the material into the central discharge hole.

[0017] As an optimized solution, the second roller mill assembly includes a second cylindrical shell, the bottom of which is connected to a second grinding roller groove plate. Several second grinding rollers are arranged inside the second cylindrical shell and rotate around the center. The roller surfaces of the second grinding rollers rub against the second grinding roller groove plate.

[0018] As an optimized solution, each of the second grinding rollers is pressurized onto the second grinding roller groove plate by an elastic component.

[0019] As an optimized solution, the second grinding roller groove plate is surrounded by a number of side discharge holes near the outer edge, and the area between adjacent second grinding rollers is provided with a second scraper that rotates around the center of the second cylinder to guide the material into the side discharge holes.

[0020] As an optimized solution, the upper surfaces of the first grinding roller groove plate and the second grinding roller groove plate are respectively provided with grinding grooves with arc-shaped cross sections, and the roller walls of the first grinding roller and the second grinding roller are matched with the grinding grooves.

[0021] As an optimized solution, the lower surfaces of the first scraper and the second scraper are in frictional contact with the upper surfaces of the first grinding roller groove and the second grinding roller groove, and the lower surfaces of the first scraper and the second scraper are also provided with extension sections that match the grinding groove.

[0022] As an optimized solution, grinding roller mounting plates are rotatably provided inside the first and second cylindrical shells, and the elastic component, the first scraper and the second scraper are correspondingly fixed to the grinding roller mounting plates.

[0023] As an optimized solution, a first discharge guide is fixedly connected to the grinding roller mounting plate inside the second cylinder shell. A connected receiving cover is fixedly connected to the upper end of the first discharge guide. The receiving cover is fitted onto the grinding roller mounting plate. The upper end of the receiving cover covers the central discharge hole. The lower end of the first discharge guide is close to the upper surface of the second grinding roller groove plate located below.

[0024] As an optimized solution, a plurality of second feeding guides covering the side feeding holes are fixedly connected to the lower surface of the second grinding roller groove plate, and the lower port of the second feeding guides is close to the upper surface of the first grinding roller groove plate located below.

[0025] As an optimized solution, a top cylinder shell is fixedly connected to the upper end of the first cylinder shell at the top. A drive motor is fixedly connected to the top cylinder shell. The output shaft of the drive motor is connected to drive shafts located in several first cylinder shells and second cylinder shells. The drive shafts are connected to the grinding roller mounting plate through a keyway structure.

[0026] As an optimized solution, the inner edge of the top shell is provided with a feed conduit to guide the material to the outer edge of the first grinding roller groove plate.

[0027] As an optimized solution, the lower end of the second cylindrical shell at the bottom is fixed to a bottom cylindrical shell, the lower port of the bottom cylindrical shell is connected to a feeding hopper, and the feeding hopper is connected to a screw conveyor.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. The grinding effect is not affected by the gravity of the material, which can more fully improve the grinding efficiency;

[0030] 2. The grinding roller utilizes elastic components to achieve elastic setting, which improves the service life of the grinding roller and the grinding roller groove plate;

[0031] 3. The material reciprocates within the first and second cylinder shells and is ground in layers, resulting in more thorough grinding;

[0032] 4. Segmented design, each layer is an independent grinding chamber, and the number of chamber layers can be increased or decreased according to different needs, making it easy to disassemble and assemble;

[0033] 5. The problem of material accumulating at the bottom and becoming ungrindable, which occurred with older ring mill rollers, is no longer present;

[0034] 6. The grading mechanism is eliminated, there is no airflow in the grinding chamber, the operation is simple, and there is no need to control airflow factors;

[0035] 7. It utilizes direct drive to achieve high transmission efficiency. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0037] Figure 1 This is a schematic diagram of the structure of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of the first roller grinding assembly and the second roller grinding assembly of the present invention;

[0039] Figure 3 This is a top view of the structure of the first scraper of the present invention;

[0040] Figure 4 This is a top view of the structure of the second scraper of the present invention.

[0041] In the figure: 1-First roller grinding assembly; 2-Second roller grinding assembly; 3-Top cylinder shell; 4-Drive machine; 5-Bottom cylinder shell; 6-Discharge bin; 7-Screw conveyor; 8-First cylinder shell; 9-Elastic component; 10-First grinding roller; 11-First grinding roller groove plate; 12-Second discharge guide; 13-Grinding roller mounting plate; 14-Second grinding roller; 15-Second grinding roller groove plate; 16-Side discharge hole; 17-Drive shaft; 18-First scraper; 19-Second scraper; 20-First discharge guide; 21-Central discharge hole; 22-Receiving cover. Detailed Implementation

[0042] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0043] like Figures 1 to 4 As shown, the roller mill includes several first roller mill components 1 and second roller mill components 2 stacked alternately from top to bottom. When the material is in the first roller mill component 1, the material moves from the outer periphery to the center; when the material is in the second roller mill component 2, the material moves from the center to the outer periphery. The order between the topmost first roller mill component 1 and the bottommost first roller mill component 1 and the second roller mill component 2 is adjustable.

[0044] The first roller grinding assembly 1 and the second roller grinding assembly 2 are detachably connected.

[0045] The first roller grinding assembly 1 includes a first cylindrical shell 8, the bottom of which is connected to a first grinding roller groove plate 11. Several first grinding rollers are arranged inside the first cylindrical shell 8 and rotate around the center. The roller surface of the first grinding rollers rubs against the first grinding roller groove plate 11.

[0046] Each first grinding roller is pressurized onto the first grinding roller groove plate 11 via the elastic component 9.

[0047] A central discharge hole 21 is provided in the center of the first grinding roller groove plate 11, and a first scraper 18 is provided in the area between adjacent first grinding rollers 10, rotating around the center of the first cylinder shell 8 to guide the material into the central discharge hole 21.

[0048] The second roller grinding assembly 2 includes a second cylindrical shell, the bottom of which is connected to a second grinding roller groove plate 15. Several second grinding rollers 14 are arranged inside the second cylindrical shell and rotate around the center. The roller surface of the second grinding rollers 14 rubs against the second grinding roller groove plate 15.

[0049] Each second grinding roller is pressurized onto the second grinding roller groove plate 15 via the elastic component 9.

[0050] The second grinding roller groove plate 15 is surrounded by several side discharge holes 16 near the outer edge, and the area between adjacent second grinding rollers 14 is provided with a second scraper 19 that rotates around the center of the second cylinder to guide the material into the side discharge holes 16.

[0051] The first scraper 18 and the second scraper 19 are set in opposite directions according to the position of the material drop opening of each layer of grinding roller groove plate, so as to ensure that the scraper can push the material to the correct direction.

[0052] The upper surfaces of the first grinding roller groove plate 11 and the second grinding roller groove plate 15 are respectively provided with grinding grooves with arc-shaped cross sections, and the roller walls of the first grinding roller and the second grinding roller are matched with the grinding grooves.

[0053] The first cylindrical shell 8 and the second cylindrical shell are respectively fixed by bolts using the corresponding first grinding roller groove plate 11 or the second grinding roller groove plate 15, so as to achieve a detachable connection.

[0054] The lower surfaces of the first scraper 18 and the second scraper 19 are in frictional contact with the upper surfaces of the first grinding roller groove plate 11 and the second grinding roller groove plate 15. The lower surfaces of the first scraper 18 and the second scraper 19 are also provided with extension sections that match the grinding groove.

[0055] The first cylindrical shell 8 and the second cylindrical shell are respectively provided with grinding roller mounting plates 13, and the elastic component 9, the first scraper 18 and the second scraper 19 are respectively fixed to the grinding roller mounting plates.

[0056] A first discharge guide 20 is fixedly connected to the grinding roller mounting plate 13 inside the second cylinder shell. A connected receiving cover 22 is fixedly connected to the upper end of the first discharge guide 20. The receiving cover 22 is fitted onto the grinding roller mounting plate 13. The upper end of the receiving cover 22 covers the central discharge hole 21. The lower end of the first discharge guide 20 is close to the upper surface of the second grinding roller groove plate located below.

[0057] The lower surface of the second grinding roller trough is fixed with a number of second discharge guides 12 that cover the side discharge holes 16. The lower port of the second discharge guide 12 is close to the upper surface of the first grinding roller trough located below.

[0058] The upper end of the first cylindrical shell at the top is fixed to a top cylindrical shell 3, and a drive motor 4 is fixed to the top cylindrical shell 3. The output shaft of the drive motor 4 is connected to a drive shaft 17 located in several first cylindrical shells 8 and second cylindrical shells. The drive shaft 17 is connected to the grinding roller mounting plate 13 through a keyway structure.

[0059] The inner edge of the top shell 3 is provided with a feed conduit to guide the material to the outer edge of the first grinding roller groove plate.

[0060] The lower end of the second cylindrical shell at the bottom is fixed to the bottom cylindrical shell 5, the lower port of the bottom cylindrical shell 5 is connected to the feeding hopper 6, and the feeding hopper 6 is connected to the screw conveyor 7.

[0061] The working principle of this device is as follows:

[0062] The grinding effect is not affected by the gravity of the material, which can more fully improve the grinding efficiency;

[0063] The grinding roller utilizes elastic component 9 to achieve elastic setting, which improves the service life of the grinding roller and grinding roller groove plate; the material reciprocates in the first and second cylinder shells and is ground in layers, resulting in more thorough grinding;

[0064] The segmented design, with each layer serving as an independent grinding chamber, allows for the addition or reduction of chamber layers to meet different needs, facilitating easy assembly and disassembly. It eliminates the problem of material accumulating at the bottom and becoming ungrindable, a common issue with older ring grinding rollers. The elimination of the grading mechanism results in no airflow within the grinding chamber, simplifying operation and eliminating the need to control airflow factors. The use of a 4-way direct drive motor ensures high transmission efficiency.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A roller mill, characterized in that: The application relates to a multi-roller mill, which comprises a plurality of first roller mill assemblies (1) and second roller mill assemblies (2) stacked alternately from top to bottom, wherein the material moves from the outer periphery to the center when located in the first roller mill assemblies (1), and the material moves from the center to the outer periphery when located in the second roller mill assemblies (2); the order of the first roller mill assembly (1) and the second roller mill assembly (2) at the topmost position and the order of the first roller mill assembly (1) and the second roller mill assembly (2) at the bottommost position can be adjusted.

2. The roller mill of claim 1, wherein: The first roller mill assembly (1) and the second roller mill assembly (2) are detachably arranged.

3. The roller mill of claim 1, wherein: The first roller mill assembly (1) comprises a first cylinder shell (8), the bottom of the first cylinder shell (8) is connected with a first mill roller groove plate (11), a plurality of first mill rollers (10) are arranged around the center in the first cylinder shell (8), and the roller surface of the first mill roller (10) is in frictional abutment with the first mill roller groove plate (11).

4. The roller mill of claim 3, wherein: Each first mill roller (10) is pressed on the first mill roller groove plate (11) through an elastic component (9).

5. The roller mill of claim 4, wherein: A central material dropping hole (21) is formed in the center of the first mill roller groove plate (11), and a first scraper (18) for guiding the material into the central material dropping hole (21) is arranged around the center of the first cylinder shell (8) between adjacent first mill rollers (10).

6. The roller mill of claim 5, wherein: The second roller mill assembly (2) comprises a second cylinder shell, the bottom of the second cylinder shell is connected with a second mill roller groove plate (15), a plurality of second mill rollers (14) are arranged around the center in the second cylinder shell, and the roller surface of the second mill roller (14) is in frictional abutment with the second mill roller groove plate (15).

7. The roller mill of claim 6, wherein: Each second mill roller (14) is pressed on the second mill roller groove plate (15) through an elastic component (9).

8. The roller mill of claim 6, wherein: A plurality of side material dropping holes (16) are arranged around the position close to the outer edge of the second mill roller groove plate (15), and a second scraper (19) for guiding the material into the side material dropping hole (16) is arranged around the center of the second cylinder shell between adjacent second mill rollers (14).

9. The roller mill of claim 8, wherein: Arc-shaped grinding grooves are formed in the upper surfaces of the first mill roller groove plate (11) and the second mill roller groove plate (15), and the roller wall of the first mill roller (10) and the second mill roller (14) is matched with the grinding groove. The lower surfaces of the first scraper (18) and the second scraper (19) are in frictional contact with the upper surfaces of the first mill roller groove plate (11) and the second mill roller groove plate (15), and the lower surfaces of the first scraper (18) and the second scraper (19) are further provided with extension sections matched with the grinding grooves.

10. The roller mill of claim 8, wherein: Mill roller mounting plates (13) are arranged in the first cylinder shell (8) and the second cylinder shell, respectively, and the elastic components (9), the first scraper (18) and the second scraper (19) are fixedly connected to the mill roller mounting plates (13). The first blanking guide pipe (20) is fixedly connected on the mill roller mounting plate (13) in the second barrel, the upper end of the first blanking guide pipe (20) is fixedly connected with the material receiving cover (22) in communication, the material receiving cover (22) is sleeved on the mill roller mounting plate (13), the upper end of the material receiving cover (22) covers the center blanking hole (21), and the lower end of the first blanking guide pipe (20) is close to the upper surface of the second mill roller groove plate (15) below; The lower surface of the second mill roller groove plate (15) is fixedly connected with a plurality of second blanking guide pipes (12) covering the side blanking hole (16), and the lower end of the second blanking guide pipe (12) is close to the upper surface of the first mill roller groove plate (11) below.

Images