Grinding machine for sandstone processing
By introducing a scraper assembly and an elastic plate into the grinding mill, combined with a composite motion trajectory, the problem of insufficient grinding of sand and gravel on the inner wall of the grinding disc was solved, improving the finished product particle size qualification rate and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAINAN QINGYAN NEW BUILDING MATERIALS CO LTD
- Filing Date
- 2025-09-03
- Publication Date
- 2026-06-05
AI Technical Summary
In existing grinding mills, the sand and gravel in the inner wall area of the grinding disc are difficult to reach by the grinding wheel, resulting in insufficient grinding, low finished product particle size qualification rate, and the sand and gravel on the inner wall are mixed with qualified materials and discharged.
By introducing a scraper assembly and an elastic plate into the grinding mill, and through the feeding plate and the arc-shaped surface guiding the material, the elastic plate adaptively pushing the material, and the double annular groove fully covering the guide, combined with the compound motion of the grinding wheel's revolution and rotation, the sand and gravel are ensured to be ground evenly.
It achieves full coverage grinding of sand and gravel, improves the finished product particle size qualification rate, shortens grinding time and reduces unit energy consumption.
Smart Images
Figure CN224321508U_ABST
Abstract
Description
Technical Field
[0001] This utility model specifically relates to a grinding mill for sand and gravel processing, belonging to the field of ore production technology. Background Technology
[0002] A sand and gravel grinding mill is a process that grinds hard stones into powder using tools. Sand and gravel grinding mills are generally suitable for materials such as seed crystals, calcite, marble, and grey stone. They have high construction efficiency, save a lot of manpower, and are easy to manage. The products are characterized by simple structure and convenient maintenance.
[0003] In existing grinding mills, sand and gravel gradually move towards the inner wall of the grinding disc under the crushing and pushing action generated by the revolution and rotation of the grinding wheels. Since the grinding wheels only move along a fixed path and cannot cover the inner wall area of the grinding disc, and there is a lack of structure to guide the sand and gravel back to the grinding path, the sand and gravel on the inner wall are difficult for the grinding wheels to reach and can only accumulate at the edges. Ultimately, this results in insufficient grinding of this portion of sand and gravel, which is then mixed with the qualified material and discharged, leading to a low finished product particle size qualification rate and poor grinding effect. Utility Model Content
[0004] The purpose of this utility model is to provide a grinding mill for sand and gravel processing, addressing the shortcomings of existing technologies.
[0005] A grinding mill for sand and gravel processing includes a grinding trough with a grinding space inside. A grinding assembly is arranged inside the grinding space. The grinding assembly includes a grinding shaft rotatably mounted inside the grinding trough, and a grinding wheel is mounted on the grinding shaft. A wall scraping assembly is also arranged inside the grinding trough. The wall scraping assembly includes a rotating rod mounted on the outer wall of the grinding shaft. Both ends of the rotating rod are connected to a material-pushing plate. The side of the material-pushing plate away from the rotating rod is in contact with the inner wall of the grinding trough, and the side of the material-pushing plate near the rotating rod is an arc-shaped surface.
[0006] Furthermore, a connecting shaft extending radially is rotatably mounted on the outer wall of the grinding shaft, and the grinding wheel is mounted on the end of the connecting shaft away from the grinding shaft.
[0007] Furthermore, a drive motor is installed on the bottom surface of the grinding trough, and the drive end of the drive motor is connected to the bottom end of the grinding shaft.
[0008] Furthermore, an elastic plate is installed on the side wall of the feeding plate, the elastic plate is close to the arc-shaped side of the feeding plate, a push rod is installed on the back of the elastic plate, an annular groove is formed on the wall of the grinding groove, the push rod is inserted into the inside of the annular groove, the annular groove has a protrusion and a recess, and the protrusion and the recess are continuously arranged.
[0009] Furthermore, there are two annular grooves, which are arranged vertically at an interval.
[0010] Furthermore, the top of the grinding trough is covered with a trough cover, and the trough cover is provided with a handle.
[0011] Furthermore, the bottom surface of the grinding trough is provided with a discharge pipe that communicates with the inside of the grinding trough, and the discharge pipe is provided with a discharge valve to control its opening and closing.
[0012] Furthermore, the outer surface of the grinding groove is provided with support legs, and there are multiple support legs, which are equidistantly distributed and arranged in an outward expansion manner.
[0013] Beneficial effects:
[0014] 1. This utility model eliminates the grinding blind zone at the bottom of the groove by using a material-pushing plate that fits against the scraper wall and an arc-shaped surface to guide the material, an elastic plate that self-adapts to push the material, and a double-ring groove that fully covers the guide. At the same time, the combined motion of the grinding wheel's revolution and rotation increases the number of frictions, shortens the grinding time, and reduces the unit energy consumption.
[0015] 2. In this utility model, the elastic plate is installed on the side wall of the feeding plate and close to the arc surface, and the push rod is fixed on the back of the elastic plate and inserted into the annular groove on the wall of the grinding groove; the protrusion and depression of the annular groove are continuously distributed. When the feeding plate revolves with the grinding shaft, the push rod moves along the concave and convex trajectory of the annular groove, so that the sand and gravel are more evenly guided to the grinding path of the grinding wheel. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a front view structural diagram of the present invention;
[0018] Figure 3 For along Figure 2 A schematic diagram of the cross-sectional structure along the center section AA;
[0019] Figure 4 For along Figure 2 A schematic diagram of the cross-sectional structure of the mid-section line BB.
[0020] In the diagram: 1. Grinding trough; 2. Trough cover; 3. Support leg; 4. Drive motor; 5. Discharge pipe; 6. Discharge valve; 7. Grinding shaft; 8. Connecting shaft; 9. Grinding wheel; 10. Rotating rod; 11. Feeding plate; 12. Elastic plate; 13. Push rod; 14. Annular groove. 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] Please see Figure 1-4 As shown, a grinding mill for sand and gravel processing includes a grinding trough 1, with a grinding space inside the grinding trough 1. A grinding assembly is arranged inside the grinding space. The grinding assembly includes a grinding shaft 7 rotatably mounted inside the grinding trough 1, with a grinding wheel 9 mounted on the grinding shaft 7. A wall scraping assembly is also arranged inside the grinding trough 1. The wall scraping assembly includes a rotating rod 10 mounted on the outer wall of the grinding shaft 7. Both ends of the rotating rod 10 are connected to a material-pushing plate 11. The side of the material-pushing plate 11 away from the rotating rod 10 is in contact with the inner wall of the grinding trough 1, and the side of the material-pushing plate 11 near the rotating rod 10 is an arc-shaped surface.
[0023] Specifically, as a basic load-bearing component, the internal grinding space provides a closed grinding environment for sand and gravel, preventing material spillage, and also provides an installation reference for the grinding components and scraping components. The grinding shaft 7 is rotatably installed inside the grinding trough 1, providing power support for the grinding wheel 9. When the grinding shaft 7 rotates, it drives the grinding wheel 9 to move synchronously. The grinding wheel 9 generates static pressure and friction grinding on the sand and gravel through its own weight and motion inertia, thereby refining the sand and gravel. The rotating rod 10 is fixed to the outer wall of the grinding shaft 7 and revolves synchronously with the grinding shaft 7, thereby driving the material-pushing plates 11 at both ends to rotate around the center of the grinding shaft 7. Since the side of the material-pushing plate 11 away from the rotating rod 10 is in contact with the inner wall of the grinding trough 1, it can scrape off the accumulated sand and gravel attached to the side wall in real time. At the same time, the arc-shaped surface of the material-pushing plate 11 near the rotating rod 10 can guide the scraped sand and gravel to the grinding path of the grinding wheel 9, preventing the sand and gravel from being stuck on the side wall.
[0024] As a technical optimization of this utility model, a connecting shaft 8 extending radially is rotatably mounted on the outer wall of the grinding shaft 7, and the grinding wheel 9 is mounted on the end of the connecting shaft 8 away from the grinding shaft 7.
[0025] Specifically, the connecting shaft 8 extends radially along the grinding shaft 7 and is rotatably connected to the outer wall of the grinding shaft 7. The grinding wheel 9 is installed at the end of the connecting shaft 8 away from the grinding shaft 7. When the grinding shaft 7 drives the connecting shaft 8 to revolve, the grinding wheel 9 comes into contact with the sand and generates friction. Under the action of friction, it rotates around the axis of the connecting shaft 8, forming a composite motion trajectory of revolution along the grinding shaft 7 and rotation around the connecting shaft 8.
[0026] As a technical optimization of this utility model, a drive motor 4 is installed on the bottom surface of the grinding groove 1, and the drive end of the drive motor 4 is connected to the bottom end of the grinding shaft 7.
[0027] Specifically, the drive motor 4 is fixed to the bottom surface of the grinding trough 1, and its drive end is directly connected to the bottom end of the grinding shaft 7. After the drive motor 4 is started, the power is directly transmitted to the grinding shaft 7, which drives the grinding shaft 7 to rotate stably, and then synchronously drives the grinding wheel 9 to grind and the rotating rod 10 to scrape the wall.
[0028] As a technical optimization of this utility model, an elastic plate 12 is installed on the side wall of the feeding plate 11. The elastic plate 12 is close to the arc-shaped side of the feeding plate 11. A push rod 13 is installed on the back of the elastic plate 12. An annular groove 14 is opened on the wall of the grinding groove 1. The push rod 13 is inserted into the inside of the annular groove 14. The annular groove 14 has a protrusion and a recess, and the protrusion and the recess are continuously arranged.
[0029] Specifically, the elastic plate 12 is installed on the side wall of the feeding plate 11 and close to the arc-shaped surface. The push rod 13 is fixed to the back of the elastic plate 12 and inserted into the annular groove 14 on the wall of the grinding groove 1. The protrusions and depressions of the annular groove 14 are continuously distributed. When the feeding plate 11 revolves with the grinding shaft 7, the push rod 13 moves along the concave and convex trajectory of the annular groove 14. When the push rod 13 enters the protrusion, it is squeezed by the groove wall and pushes the elastic plate 12 in the direction of the grinding path, causing the elastic plate 12 to deform and further push the sand and gravel near the side wall towards the grinding wheel 9. When the push rod 13 enters the depression, the elastic plate 12 returns to its original position, so that the sand and gravel are more evenly guided to the grinding path of the grinding wheel 9.
[0030] As a technical optimization of this utility model, two annular grooves 14 are provided, and the two annular grooves 14 are arranged vertically at intervals.
[0031] Specifically, the trough cover 2 covers the top of the grinding trough 1 to form a closed grinding environment; the handle is fixed to the surface of the trough cover 2 to facilitate the operator to open and close the trough cover 2 for feeding, equipment maintenance or internal cleaning.
[0032] As a technical optimization of this utility model, the top of the grinding trough 1 is covered with a trough cover 2, and a handle is provided on the trough cover 2.
[0033] Specifically, the trough cover 2 covers the top of the grinding trough 1 to form a closed grinding environment; the handle is fixed to the surface of the trough cover 2 to facilitate the operator to open and close the trough cover 2 for feeding, equipment maintenance or internal cleaning.
[0034] As a technical optimization of this utility model, the bottom surface of the grinding trough 1 is provided with a discharge pipe 5 that communicates with the inside of the grinding trough 1, and a discharge valve 6 is provided on the discharge pipe 5 to control its opening and closing.
[0035] Specifically, the discharge pipe 5 is installed on the bottom surface of the grinding trough 1 and is connected to the grinding space to discharge qualified sand and gravel; the discharge valve 6 is installed on the discharge pipe 5 and controls the timing and speed of discharge by opening and closing the valve.
[0036] As a technical optimization of this utility model, the outer surface of the grinding groove 1 is provided with support legs 3, and multiple support legs 3 are provided. The multiple support legs 3 are distributed at equal intervals and the support legs 3 are arranged in an outward expansion manner.
[0037] Specifically, multiple support legs 3 are equidistantly distributed on the outer surface of the grinding trough 1, and are arranged in an outward-expanding manner away from the center of the trough, tilting outward to form a stable support structure; the bottom of the support legs 3 has a large contact area with the ground, which can disperse the vibration load during equipment operation and prevent the equipment from tipping over or shifting.
[0038] The specific process of this sand and gravel processing mill is as follows:
[0039] The drive motor 4 on the bottom of the grinding trough 1 is started, and its drive end drives the grinding shaft 7 to rotate, providing power for the entire grinding system. The grinding wheel 9 is installed on the outer wall of the grinding shaft 7 through the radially extending connecting shaft 8. When the grinding shaft 7 rotates, the connecting shaft 8 revolves around the center of the grinding shaft 7 synchronously. At the same time, the grinding wheel 9 rotates due to the friction with the sand and gravel, forming a composite motion trajectory of revolution and rotation.
[0040] The sand and gravel to be ground are put into the grinding space through the trough cover 2 at the top of the grinding trough 1. During the revolution and rotation of the grinding wheel 9, the grinding wheel 9 generates static pressure and friction grinding on the sand and gravel by means of its own weight and motion inertia, and gradually refines the blocky sand and gravel to the target particle size. During the grinding process, the coarse particles that do not meet the standard are left at the bottom of the grinding trough 1, and the qualified materials can be discharged through the discharge pipe 5 at the bottom.
[0041] The rotating rod 10, which rotates synchronously with the grinding shaft 7, drives the material-pushing plates 11 at both ends to revolve with the grinding shaft 7. Since the side of the material-pushing plate 11 away from the rotating rod 10 is in contact with the inner wall of the grinding groove 1, it can scrape off the sand and gravel attached to or accumulated on the side wall in real time. At the same time, the arc-shaped surface of the material-pushing plate 11 near the rotating rod 10 can guide the scraped sand and gravel to the grinding path of the grinding wheel 9, avoiding the accumulation of sand and gravel on the side wall.
[0042] The elastic plate 12 on the side wall of the feeding plate 11 moves synchronously with the feeding plate 11. The push rod 13 on its back is inserted into the annular groove 14 on the wall of the grinding trough 1. The annular groove 14 has two sections, one above the other, to ensure movement stability. When the push rod 13 revolves with the feeding plate 11, it moves continuously along the protrusion and recess of the annular groove 14. Under the squeezing action of the protrusion, the push rod 13 pushes the elastic plate 12 to deform in the direction of the grinding path, further pushing the sand and gravel near the side wall towards the grinding wheel 9, so that the sand and gravel are more evenly guided to the grinding path of the grinding wheel 9. At the same time, the deformation of the elastic plate 12 can adapt to the change of sand and gravel particle size, avoiding hard friction damage to the equipment. In addition, the multiple outwardly expanding support legs 3 on the outer surface of the grinding trough 1 can ensure the stability of the equipment during operation and reduce the impact of vibration on the grinding accuracy.
[0043] 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.
[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A grinding mill for sand and gravel processing, comprising a grinding trough (1), wherein a grinding space is provided inside the grinding trough (1), and a grinding assembly is provided inside the grinding space, characterized in that: The grinding assembly includes a grinding shaft (7) mounted inside the grinding groove (1), and a grinding wheel (9) is mounted on the grinding shaft (7). Inside the grinding groove (1), a wall scraping assembly is also provided. The wall scraping assembly includes a rotating rod (10) mounted on the outer wall of the grinding shaft (7). Both ends of the rotating rod (10) are connected to a material-pushing plate (11). The side of the material-pushing plate (11) away from the rotating rod (10) is in contact with the inner wall of the grinding groove (1). The side of the material-pushing plate (11) near the rotating rod (10) is an arc-shaped surface.
2. The grinding mill for sand and gravel processing as described in claim 1, characterized in that: A connecting shaft (8) extending radially is rotatably mounted on the outer wall of the grinding shaft (7), and the grinding wheel (9) is mounted on the end of the connecting shaft (8) away from the grinding shaft (7).
3. The grinding mill for sand and gravel processing as described in claim 1, characterized in that: A drive motor (4) is installed on the bottom surface of the grinding groove (1), and the drive end of the drive motor (4) is connected to the bottom end of the grinding shaft (7).
4. The grinding mill for sand and gravel processing as described in claim 1, characterized in that: An elastic plate (12) is installed on the side wall of the feeding plate (11). The elastic plate (12) is close to the arc-shaped side of the feeding plate (11). A push rod (13) is installed on the back of the elastic plate (12). An annular groove (14) is opened on the wall of the grinding groove (1). The push rod (13) is inserted into the inside of the annular groove (14). The annular groove (14) has a protrusion and a recess, and the protrusion and the recess are continuously arranged.
5. The grinding mill for sand and gravel processing as described in claim 4, characterized in that: There are two annular grooves (14), which are arranged vertically at intervals.
6. The grinding mill for sand and gravel processing as described in claim 1, characterized in that: The top of the grinding trough (1) is covered with a trough cover (2), and the trough cover (2) is provided with a handle.
7. The grinding mill for sand and gravel processing as described in claim 1, characterized in that: The bottom surface of the grinding trough (1) is provided with a discharge pipe (5) that communicates with the inside of the grinding trough (1), and the discharge pipe (5) is provided with a discharge valve (6) that controls its opening and closing.
8. The grinding mill for sand and gravel processing as described in claim 1, characterized in that: The outer surface of the grinding groove (1) is provided with support legs (3), and there are multiple support legs (3). The multiple support legs (3) are distributed at equal intervals, and the support legs (3) are arranged in an outward expansion manner.