Double-powder-selecting combined grinding device

Abstract

The utility model relates to the technical field of grinding devices, in particular to a double-powder-selecting combined grinding device. According to the technical scheme, the device comprises a base, a mill, a first material distributing pipe, a motor, a supporting pipe and a rotating shaft, the mill is arranged at the upper end of the base, a millstone is rotationally installed in the mill, the supporting pipe penetrates through the center of the millstone, a fan is arranged in the base, a filter cover is arranged at the upper end of the supporting pipe, and a grinding roller is installed at the upper end of the millstone in a rolling mode; a first screen is arranged at the upper end of the mill, a second screen is arranged at the upper end of the first screen, a first material distributing pipe is installed at the upper end of the mill in a penetrating mode, a collecting pipe is installed in the first material distributing pipe in a penetrating mode, the outer wall of a supporting pipe is sleeved with a gear ring, a motor is arranged in the base, and a gear is arranged at the output end of the motor. The powder is conveyed through lifting airflow, multi-stage screening is carried out through the first screen and the second screen in the conveying process, and fine graded collection of the powder is achieved.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment technology, and in particular to a dual-selection powder combined grinding device. Background Technology

[0002] Grinding equipment is commonly used in the grinding and pulverizing stages of cement production. Its main function is to grind raw materials (such as limestone, clay, iron ore, etc.) into fine powder to produce the powdered substances required for cement. After being ground by the grinding equipment, these raw materials are mixed, calcined, and processed in the cement production line to finally form cement products.

[0003] After cement is ground, it needs to be screened. Screening environments are mostly used to screen out particles larger than a certain size, but they cannot screen very small or medium-sized powders, and multi-stage screening is not possible. Different particle sizes of powder are suitable for different cement products, and the screening process of cement powder is not precise enough. Therefore, we propose a dual-selection powder combined grinding device to solve the existing problems. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a dual-selection powder combined grinding device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dual-selection powder combined grinding device, comprising a base, a mill, a first distribution pipe, a motor, a support pipe, and a rotating shaft. The mill is mounted on the upper end of the base, and a grinding disc is rotatably installed inside the mill. A support pipe passes through the center of the grinding disc. A fan with its suction end facing the outside is installed inside the base. An air supply pipe located inside the support pipe is installed at the output end of the fan. A filter cover is installed on the upper end of the support pipe. Grinding rollers arranged in a circular array are rotatably mounted on the upper end of the grinding disc. A first screen with a conical cross-section is installed on the upper end of the mill. A second screen is installed on the upper end of the first screen. A first distribution pipe passes through the upper end of the mill. A collection pipe passes through the first distribution pipe. A gear ring is sleeved on the outer wall of the support pipe. A motor is installed inside the base. A gear that meshes with the gear ring is installed at the output end of the motor. A feeding pipe passes through the inside of the mill.

[0006] Preferably, the upper center of the second screen is open, and the opening at the upper end of the second screen is connected to the lower outer wall of the collecting pipe. The opening at the upper end of the second screen allows the powder intercepted by the second screen to flow into the collecting pipe.

[0007] Preferably, a filter cartridge is installed inside the collecting pipe, and both ends of the filter cartridge are provided with closed rings connected to the inner wall of the collecting pipe. The filter cartridge screens small-sized particles of powder that are distributed and mixed in medium-sized powder.

[0008] Preferably, a second distribution pipe is installed through the upper end of the collection pipe. Small-sized materials can be effectively passed through the filter cartridge and transported through the second distribution pipe.

[0009] Preferably, a rotating shaft is rotatably mounted inside the filter cover via a sealing ring. The rotating shaft is rotatably mounted to screen one and screen two via the sealing ring. A sealing ring is embedded inside the support tube, and the air supply pipe is inserted into the sealing ring. The rotating shaft rotates inside the filter cover via the sealing ring, which provides rotational support for the rotating shaft within screen one and screen two.

[0010] Preferably, the outer wall of the rotating shaft is provided with a rotating plate one located below the first screen, and a brush one is provided at the upper end of the rotating plate one. The outer wall of the rotating shaft is provided with a rotating plate two located below the second screen, and a brush two is provided at the upper end of the rotating plate two. A brush three is provided on the outer wall of the end of the rotating shaft inside the filter cylinder. The rotating plates one and two rotate with the rotating shaft, causing the brush one and brush two to scrape the lower end of the screen, facilitating the flow of cement powder. At the same time, the rotation also causes the brush three to scrape the inner wall of the filter cylinder, facilitating the flow of powder inside the filter cylinder.

[0011] Preferably, a guide bucket is provided on the upper inner wall of the mill, and the guide bucket is connected to the lower end of the distribution pipe. The guide bucket guides and conveys the powder passing through the second screen, and the powder flows through the guide bucket into the first distribution pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model uses a grinding disc and grinding rollers that rotate relative to each other to grind the input cement raw materials. At the same time, under the action of the lifting airflow, the ground particles are lifted and passed through screen one and screen two, resulting in graded screening. Unqualified cement grinding particles are intercepted by screen one, medium-sized cement grinding particles are intercepted by screen two, small-sized cement grinding particles are output through distribution pipe one, and medium-sized cement grinding particles are output through collection pipe. This shows the multi-stage screening of cement grinding particles, which can adapt to different cement preparation needs and improve the fine screening of cement after grinding. Attached Figure Description

[0014] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a bottom sectional view of the three-dimensional structure of this utility model;

[0016] Figure 3 This is a three-dimensional view of the internal structure of the mill according to the present invention.

[0017] Figure 4 This is a top-view three-dimensional structural diagram of the internal structure of the mill of this utility model;

[0018] Figure 5 This is a side sectional three-dimensional structural diagram of the support tube of this utility model;

[0019] Figure 6 This is a three-dimensional cross-sectional view of the collection tube of this utility model.

[0020] Reference numerals in the attached diagram: 1. Base; 2. Distribution pipe II; 3. Mill; 4. Guide bucket; 5. Collection pipe; 6. Distribution pipe I; 7. Feeding pipe; 8. Grinding disc; 9. Motor; 10. Gear; 11. Gear ring; 12. Fan; 13. Air supply pipe; 14. Grinding roller; 15. Screen I; 16. Screen II; 17. Rotating plate I; 18. Brush I; 19. Rotating plate II; 20. Brush II; 21. Sealing ring; 22. Support pipe; 23. Filter cover; 24. Rotating shaft; 25. Closing ring; 26. Brush III; 27. Filter cartridge. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-6 As shown, the present invention proposes a dual-selection powder combined grinding device, including a base 1, a mill 3, a feed distribution pipe 6, a motor 9, a support pipe 22, and a rotating shaft 24. The mill 3 is mounted on the upper end of the base 1, and a grinding disc 8 is rotatably installed inside the mill 3. The support pipe 22 passes through the center of the grinding disc 8. A fan 12 with its suction end facing the outside is installed inside the base 1. An air delivery pipe 13 located inside the support pipe 22 is installed at the output end of the fan 12. A filter cover 23 is installed on the upper end of the support pipe 22. The upper end of the grinding disc 8 is equipped with grinding rollers 14 arranged in a ring array. The upper end of the mill 3 is equipped with a screen 15 with a conical cross section. The upper end of the screen 15 is equipped with a screen 16. The upper end of the mill 3 is equipped with a distribution pipe 6. The inside of the distribution pipe 6 is equipped with a collection pipe 5. The outer wall of the support pipe 22 is fitted with a gear ring 11. The base 1 is equipped with a motor 9. The output end of the motor 9 is equipped with a gear 10 that meshes with the gear ring 11. The inside of the mill 3 is equipped with a feeding pipe 7.

[0023] The upper center of the second screen 16 is open, and the upper opening of the second screen 16 is connected to the lower outer wall of the collecting tube 5.

[0024] A guide bucket 4 is provided on the inner wall of the upper end of the mill 3, and the guide bucket 4 is connected to the lower end of the distribution pipe 6;

[0025] Based on the implementation steps of Example 1: The feeding pipe 7 conveys cement raw materials to the grinding disc 8, the grinding roller 14 rolls on the grinding disc 8 to crush the powder, thereby realizing the grinding process of the powder. The blower 12 conveys airflow and discharges it through the support pipe 22. When the support pipe 22 rotates with the grinding disc 8, the air supply pipe 13 is stabilized by the sealing ring 21. The filter cover 23 intercepts the cement raw materials falling into the mill 3 to prevent the cement raw materials from entering the support pipe 22. The lifting air lifts the cement after grinding. When the cement powder passes through the screen 15, the large-size cement grinding particles are usually relatively large. These particles mainly refer to those that have not been fully ground or have large particles due to other problems, which are not conducive to mixing. The intercepted large cement powder particles are intercepted and fall downwards.

[0026] The cement powder, after passing through sieve 15, is then sieved through sieve 16. Medium-sized cement powder particles fall between large and small particle sizes, typically ranging from several millimeters to tens of micrometers in diameter. These particles have a suitable size, allowing for effective mixing with other raw materials and direct use in cement product preparation. Small-sized cement powder particles, also sieved through sieve 16, are generally smaller, with diameters typically ranging from tens of micrometers to hundreds of nanometers. These particles exhibit higher reactivity and ductility, contributing to improved cement product performance.

[0027] Medium-sized cement particles are conveyed through collection pipe 5, while small-sized cement particles are conveyed through distribution pipe 6, realizing multi-stage screening of cement particles after grinding, adapting to the needs of different cement processing, and thus achieving fine cement screening.

[0028] like Figure 1-6 As shown in the figure, compared with Embodiment 1, the dual-selection powder combined grinding device proposed in this utility model further includes: a filter cylinder 27 is provided inside the collection tube 5, and closed rings 25 connected to the inner wall of the collection tube 5 are provided at both ends of the filter cylinder 27.

[0029] The upper end of the collection pipe 5 is connected to the distribution pipe 2;

[0030] Inside the filter cover 23, a rotating shaft 24 is rotatably installed via a sealing ring 21. The rotating shaft 24 is rotatably installed with screen 15 and screen 26 via the sealing ring 21. The support tube 22 is embedded with a sealing ring 21. The air supply tube 13 is inserted into the sealing ring 21.

[0031] A rotating plate 17 located below the screen 15 is provided on the outer wall of the rotating shaft 24. A brush 18 is provided on the upper end of the rotating plate 17. A rotating plate 29 located below the screen 26 is provided on the outer wall of the rotating shaft 24. A brush 20 is provided on the upper end of the rotating plate 29. A brush 3 26 is provided on the outer wall of the end of the rotating shaft 24 inside the filter cylinder 27.

[0032] In this embodiment, during the cement grinding and screening process, a portion of the small-sized cement grinding particles, which are completely passed through screen 15 and mixed with medium-sized cement grinding particles, enter the screen cylinder. As they flow through the screen cylinder, the small-sized cement grinding particles enter the distribution pipe 2 and are then transported and collected through the distribution pipe 2. This improves the fineness of the grading and screening process during cement grinding. Simultaneously, during the screening process, brush 18 scrapes the lower end of screen 15, brush 20 scrapes the lower end of screen 26, and brush 326 scrapes the inner wall of the filter cylinder 27, which helps the flow of cement grinding particles, improves the situation of cement grinding particles clogging the filter components, and enhances the stability of the screening components after cement grinding.

[0033] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A dual-selection powder combined grinding device, comprising a base (1), a mill (3), a feed distribution pipe (6), a motor (9), a support pipe (22), and a rotating shaft (24), characterized in that: A mill (3) is installed on the upper end of the base (1). A grinding disc (8) is rotatably installed inside the mill (3). A support pipe (22) runs through the center of the grinding disc (8). A fan (12) with its suction end facing the outside is installed inside the base (1). An air supply pipe (13) located inside the support pipe (22) is installed at the output end of the fan (12). A filter cover (23) is installed on the upper end of the support pipe (22). Grinding rollers (14) arranged in a circular array are rotatably installed on the upper end of the grinding disc (8). The mill (3) The upper end is provided with a screen with a conical cross section (15), and the upper end of the screen is provided with a screen (16). The upper end of the mill (3) is provided with a distribution pipe (6), and the inside of the distribution pipe (6) is provided with a collection pipe (5). The outer wall of the support pipe (22) is fitted with a gear ring (11). The base (1) is provided with a motor (9), and the output end of the motor (9) is provided with a gear (10) that meshes with the gear ring (11). The inside of the mill (3) is provided with a feeding pipe (7).

2. The dual-selection powder combined grinding device according to claim 1, characterized in that: The upper center of the second screen (16) is open, and the upper opening of the second screen (16) is connected to the lower outer wall of the collection tube (5).

3. The dual-selection powder combined grinding device according to claim 1, characterized in that: The collection tube (5) is equipped with a filter cylinder (27) inside, and both ends of the filter cylinder (27) are provided with closed rings (25) that are connected to the inner wall of the collection tube (5).

4. The dual-selection powder combined grinding device according to claim 1, characterized in that: The upper end of the collection pipe (5) is fitted with a material distribution pipe (2).

5. The dual-selection powder combined grinding device according to claim 1, characterized in that: The filter cover (23) has a rotating shaft (24) rotatably installed inside through a sealing ring (21). The rotating shaft (24) is rotatably installed with screen one (15) and screen two (16) through the sealing ring (21). The support tube (22) has a sealing ring (21) embedded inside. The air supply pipe (13) is inserted into the sealing ring (21).

6. The dual-selection powder combined grinding device according to claim 5, characterized in that: The outer wall of the rotating shaft (24) is provided with a rotating plate (17) located below the screen (15). A brush (18) is provided at the upper end of the rotating plate (17). The outer wall of the rotating shaft (24) is provided with a rotating plate (19) located below the screen (16). A brush (20) is provided at the upper end of the rotating plate (19). A brush (26) is provided on the outer wall of one end of the rotating shaft (24) inside the filter cylinder (27).

7. The dual-selection powder combined grinding device according to claim 1, characterized in that: The upper inner wall of the mill (3) is provided with a guide bucket (4), which is connected to the lower end of the feed distribution pipe (6).

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