Vertical flour mill

Abstract

The utility model discloses a vertical flour mill which comprises a flour mill body, a milling roller mechanism arranged at the lower end in the flour mill body and used for milling, an air blower arranged at the lower end of the flour mill body and used for blowing air into the flour mill body, and an analyzer arranged at the upper end of the flour mill body and used for sorting powder, the vertical flour mill comprises a flour mill body, an analyzer is arranged on the flour mill body, a flour milling roller mechanism is arranged on the flour mill body, and a graded flour milling device is arranged in the flour mill body and located between the analyzer and the flour milling roller mechanism. Compared with the prior art, the vertical flour mill has the advantages that the graded flour milling device is additionally arranged between the analyzer and the flour milling roller mechanism; and the coarse particle substances can be directly treated and ground and do not need to return to the grinding roller mechanism for secondary grinding, so that the time and energy consumption are saved, and the operation efficiency of the whole system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder grinding, in particular to a vertical powder grinding machine. Background Art

[0002] Powder grinding is the core step in the production of limestone powder. Usually, a Raymond powder grinding machine is used for powder grinding. This kind of powder grinding machine can grind limestone into powder with a fineness between 80 and 325 meshes. During the powder grinding process, if the particle size is too coarse, it can be selected by an analyzer, and the unqualified coarse powder will be returned to the powder grinding machine for grinding again.

[0003] For the structure of the existing Raymond machine, please refer to the Chinese utility model patent with the application number 202321798807.5, an efficient Raymond powder grinding machine. Through the cooperation of the first motor, it can drive the rotating plate and the connecting block to rotate, thereby driving the connecting rod to rotate, and further driving the support plate to rotate. Through the rotation of the support plate, it can drive the first machine case to rotate, thereby driving the grinding roller to revolve. Through the cooperation of the second motor, it can drive the grinding roller to rotate self - sufficiently, thereby improving the powder grinding efficiency.

[0004] The inventor believes that the above - mentioned Raymond grinding roller can not only revolve but also rotate self - sufficiently. Although it can improve the grinding efficiency, because it does not have a grading function, different - sized powder materials are mixed together during the grinding process. When precise grinding is required, it needs to be ground repeatedly for a long time. Therefore, the purpose of this application is to propose a vertical powder grinding machine with a grading function, which can further improve the powder grinding efficiency. Summary of the Utility Model

[0005] In view of the above situation, to overcome the defects of the prior art, the utility model provides a vertical powder grinding machine to solve the above problems.

[0006] To achieve the above purpose, a vertical powder grinding machine of the utility model includes a powder grinding machine body, a powder grinding roller mechanism arranged at the lower end inside the powder grinding machine body for powder grinding, a blower arranged at the lower end of the powder grinding machine body for blowing air into the powder grinding machine body, and an analyzer arranged at the upper end of the powder grinding machine body for sorting powder materials. A grading powder grinding device is arranged between the analyzer and the powder grinding roller mechanism inside the powder grinding machine body. The grading powder grinding device includes a powder receiving groove rotatably arranged at the bottom of the analyzer for receiving unqualified coarse powder, a grinding plate fixed on the inner wall of the powder grinding machine body and located at the bottom of the powder receiving groove, a feeding port rotatably arranged at the bottom of the powder receiving groove for adding coarse powder to the surface of the grinding plate, and a fine grinding roller rotatably installed at the bottom of the powder receiving groove for rolling and grinding the coarse powder on the surface of the grinding plate.

[0007] Preferably, a material shoveling plate is further fixed at the bottom of the powder receiving groove.

[0008] Preferably, the grinding plate is of an annular structure, and the surface of the grinding plate slopes downward towards the center of the flour mill body.

[0009] Preferably, the flour grinding roller mechanism includes a motor fixed to the bottom of the flour mill body, a rotating shaft fixed to the output shaft of the motor, a shoveling plate fixed to the side of the rotating shaft, a coarse grinding roller rotatably mounted on the side of the rotating shaft through a star-shaped frame, and a grinding ring fixed to the inner wall of the flour mill body and cooperating with the coarse grinding roller.

[0010] Preferably, the powder receiving trough is fixed to the side of the rotating shaft through a fixing frame.

[0011] Preferably, a powder receiving trough scraper is fixedly arranged on the inner wall of the flour mill body.

[0012] Compared with the prior art, the present utility model has the following advantages: By adding a grading and grinding device at the position between the classifier and the flour grinding roller mechanism, the present vertical flour mill enables coarse particulate matter to be directly processed and ground without having to return to the flour grinding roller mechanism for secondary grinding, thereby saving time and energy consumption and improving the operating efficiency of the entire system. Description of the Drawings

[0013] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0014] Figure 1 is a schematic three-dimensional structure diagram of the present utility model.

[0015] Figure 2 is a schematic structure diagram of the present utility model.

[0016] Figure 3 is a schematic structure diagram of the powder receiving trough of the present utility model.

[0017] In the figure: 1, flour mill body; 2, flour grinding roller mechanism; 21, motor; 22, rotating shaft; 23, shoveling plate; 24, star-shaped frame; 25, coarse grinding roller; 26, grinding ring; 27, fixing frame; 3, blower; 4, classifier; 5, grading and grinding device; 51, powder receiving trough; 52, grinding plate; 53, feeding port; 54, fine grinding roller; 55, shoveling material plate; 56, powder receiving trough scraper. Detailed Description of the Preferred Embodiments

[0018] The following further elaborates in detail on the specific embodiments of the present utility model in conjunction with the attached Figures 1 - 3 drawings.

[0019] By Figures 1 - 3Provided is a vertical mill of the present utility model, which includes a mill body 1, a grinding roller mechanism 2 arranged at the lower end inside the mill body 1 for grinding, a blower 3 arranged at the lower end of the mill body 1 for blowing air into the mill body 1, and an analyzer 4 arranged at the upper end of the mill body 1 for sorting powder materials. During use, the materials to be ground are added into the mill body 1 through the hopper on the side. The grinding roller mechanism 2 starts to work for grinding. During the grinding process, the blower 3 blows air into the mill body 1 to lift the powder materials to the analyzer 4. The impeller of the analyzer 4 rotates at a high speed. The materials with large particle sizes are thrown towards the inner wall of the mill body 1 under the action of centrifugal force and fall downward. The qualified powder materials with small particle sizes enter the analyzer 4 and are discharged upward. The above structure is the common structure of a Raymond mill in the prior art, so in this embodiment, it will not be described in detail. The key improvement in this embodiment lies in:

[0020] A classification grinding device 5 is arranged between the analyzer 4 and the grinding roller mechanism 2 inside the mill body 1. The classification grinding device 5 includes a powder receiving groove 51 rotatably arranged at the bottom of the analyzer 4 for receiving unqualified coarse powder, a grinding plate 52 fixed on the inner wall of the mill body 1 and located at the bottom of the powder receiving groove 51, a feeding port 53 rotatably arranged at the bottom of the powder receiving groove 51 for adding coarse powder to the surface of the grinding plate 52, and a fine grinding roller 54 rotatably installed at the bottom of the powder receiving groove 51 for rolling and grinding the coarse powder on the surface of the grinding plate 52. During use, the unqualified powder materials fall into the receiving groove 51 after being screened by the analyzer 4. When the powder receiving groove 51 rotates, the coarse powder materials therein are evenly added to the grinding plate 52 through the feeding port 53, and then ground by the rolling of the fine grinding roller 54. In this way, the coarse powder materials screened by the analyzer 4 do not need to return to the grinding roller mechanism 2 at the bottom of the mill body 1 for grinding, improving the grinding efficiency.

[0021] Furthermore, a material shoveling plate 55 is fixed at the bottom of the powder receiving groove 51. The grinding plate 52 is of an annular structure, and the surface of the grinding plate 52 slopes downward towards the center of the mill body 1. After being rolled by the fine grinding roller 54, an unqualified coarse powder layer will be formed on the surface of the grinding plate 52. By the rotation of the powder receiving groove 51, the material shoveling plate 55 is driven to rotate, shoveling up the fine powder layer on the surface of the grinding plate 52. After the shoveled fine powder materials leave the surface of the grinding plate 52, they will smoothly pass through the analyzer 4 under the action of the blower 3.

[0022] In some embodiments, the grinding roller mechanism 2 includes a motor 21 fixed to the bottom of the grinding machine body 1, a rotating shaft 22 fixed to the output shaft of the motor 21, a shovel plate 23 fixed to the side of the rotating shaft 22, a coarse grinding roller 25 rotatably mounted on the side of the rotating shaft 22 through a star-shaped frame 24, and a grinding ring 26 fixed to the inner wall of the grinding machine body 1 and cooperating with the coarse grinding roller 25. Connect the external power supply of the motor 21 to drive the rotation of the rotating shaft 22. When the rotating shaft 22 rotates, it drives the coarse grinding roller 25 to rotate through the star-shaped frame 24, crushing the large pieces of material at the bottom of the grinding machine body 1. During the rotation of the rotating shaft 22, it also drives the shovel plate 23 to rotate, continuously lifting the powder at the bottom of the grinding machine body 1, so that the large pieces of material at the bottom are thrown between the coarse grinding roller 25 and the grinding ring 26, and the small particle materials and stratified materials are lifted up to the analyzer 4 for screening.

[0023] In some embodiments, the powder receiving trough 51 is fixed to the side of the rotating shaft 22 through a fixing frame 27, and the rotation of the rotating shaft 22 drives the powder receiving trough 51 to rotate.

[0024] Preferably, a powder receiving trough scraper 56 is fixedly provided on the inner wall of the grinding machine body 1. The position of the material receiving trough scraper 56 is fixed. When the material receiving trough 51 rotates, the material receiving trough scraper 56 moves relative to the material receiving trough 51, so that the coarse powder is spread out in the material receiving trough 51.

[0025] Inside the main body of the grinding machine of the present invention, a grading and grinding mechanism is provided between the analyzer and the grinding roller mechanism, including a powder receiving trough for receiving unqualified coarse powder and a grinding plate at the bottom of the powder receiving trough. At the same time, there is also a fine grinding roller for rolling and pressing the surface of the grinding plate. The coarse powder screened by the analysis mechanism can be directly added to the grinding plate for secondary grinding, thus avoiding unnecessary repeated grinding and greatly improving the grinding efficiency.

[0026] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vertical mill, comprising a mill body (1), a grinding roller mechanism (2) disposed at the lower end inside the mill body (1) for grinding powder, a blower (3) disposed at the lower end of the mill body (1) for blowing air into the mill body (1), and an analyzer (4) disposed at the upper end of the mill body (1) for sorting powder materials, characterized in that, A classification and grinding device (5) is provided between the classifier (4) and the grinding roller mechanism (2) inside the body (1) of the pulverizer. The classification and grinding device (5) includes a powder receiving trough (51) rotatably arranged at the bottom of the classifier (4) for receiving unqualified coarse powder, a grinding plate (52) fixed to the inner wall of the body (1) of the pulverizer and located at the bottom of the powder receiving trough (51), a feeding port (53) rotatably arranged at the bottom of the powder receiving trough (51) for adding coarse powder to the surface of the grinding plate (52), and a fine grinding roller (54) rotatably installed at the bottom of the powder receiving trough (51) for rolling and grinding the coarse powder on the surface of the grinding plate (52).

2. The vertical mill according to claim 1, characterized in that, A material shoveling plate (55) is also fixed to the bottom of the powder receiving trough (51).

3. The vertical mill according to claim 2, wherein, The grinding plate (52) is of an annular structure, and the surface of the grinding plate (52) slopes downward towards the center of the body (1) of the pulverizer.

4. A vertical mill according to claim 1, characterized in that, The grinding roller mechanism (2) includes a motor (21) fixed to the bottom of the body (1) of the pulverizer, a rotating shaft (22) fixed to the output shaft of the motor (21), a shoveling plate (23) fixed to the side of the rotating shaft (22), a coarse grinding roller (25) rotatably installed on the side of the rotating shaft (22) through a star-shaped frame (24), and a grinding ring (26) fixed to the inner wall of the body (1) of the pulverizer and cooperating with the coarse grinding roller (25).

5. An upright mill according to claim 4, characterized in that, The powder receiving trough (51) is fixed to the side of the rotating shaft (22) through a fixing frame (27).

6. The vertical mill according to claim 1, characterized in that, A powder receiving trough scraper (56) is fixedly arranged on the inner wall of the body (1) of the pulverizer.

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