Grinding device

Abstract

The utility model relates to a grinding device which comprises a cylinder body with a top opening and a grinding mechanism arranged in the cylinder body, the grinding mechanism comprises a first grinding block, a second grinding block matched with the first grinding block for use and a rotatable rotating shaft, the first grinding block is fixedly installed on the inner wall of the cylinder body, the second grinding block is fixedly connected with the rotating shaft, and the rotating shaft is fixedly connected with the first grinding block. The rotating shaft is rotatably connected with the cylinder body, a discharge port is formed in the bottom of the cylinder body, a funnel-shaped screen is arranged at the discharge port, a residue collecting box is arranged at the lowest point of the screen, the residue collecting box is detachably connected with the screen, and a plurality of uniformly distributed screen holes are formed in the residue collecting box and the screen. According to the utility model, materials with qualified sizes can be separated in time in the grinding process, so that materials with overlarge sizes can be ground again after one-time grinding, the situation that the sizes of the materials are too small due to repeated grinding of the materials with the qualified sizes is effectively reduced, and the grinding efficiency and the quality of finished products are remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of quick-setting agent processing, and in particular relates to a grinding device. Background Art

[0002] The main component of the accelerator is alumina clinker (i.e. clinker made by burning bauxite, soda ash and quicklime in proportion) which is ground into powder. Accelerator is an admixture added to concrete to make the concrete solidify and harden quickly. It is an indispensable additive in the construction method of shotcrete. Its function is to accelerate the hydration and hardening of cement and form sufficient strength in a very short time to meet the requirements of special construction. Accelerator is a solid block before production and needs to be processed and ground to become powder for use.

[0003] The existing quick-setting agent processing and grinding devices mainly grind the quick-setting agent materials through crushing rollers and grinding rollers. For example, the Chinese utility model patent with publication number CN217699366U, entitled A High-efficiency Grinding Device for the Production of Quick-setting Agents, is that the first motor is operated, the first output shaft drives the first crushing roller to rotate, thereby rotating the first gear, the first gear is meshed with the second gear, thereby driving the second crushing roller to rotate, and the materials are crushed through the cooperation of the first crushing roller and the second crushing roller, and the crushed materials pass through the partition plate and fall on the filter screen, the first electric push rod is extended and retracted, driving the first grinding roller to move, repeatedly crushing the materials on the filter screen, thereby grinding the materials into powder.

[0004] However, the existing grinding devices have a complex structure, do not grind the materials sufficiently, have poor grinding effects, and have low efficiency; and most grinding devices cannot screen the ground materials, resulting in uneven coarseness of the materials, which in turn affects product quality. Utility Model Content

[0005] The utility model provides a grinding device in view of the technical problems existing in the prior art.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A grinding device comprises a cylinder with an opening at the top and a grinding mechanism arranged inside the cylinder, the grinding mechanism comprises a first grinding block, a second grinding block used in conjunction with the first grinding block, and a rotatable rotating shaft, the first grinding block is fixedly mounted on the inner wall of the cylinder, the second grinding block is fixedly connected to the rotating shaft, the rotating shaft is rotatably connected to the cylinder, a discharge port is provided at the bottom of the cylinder, a funnel-shaped screen is provided at the discharge port, a slag collecting box is provided at the lowest point of the screen, the slag collecting box is detachably connected to the screen, and a plurality of evenly distributed sieve holes are provided on the slag collecting box and the screen.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, one end of the rotating shaft is fixedly connected to the motor shaft, and the other end is rotatably connected to the first grinding block through a bearing seat and a support frame.

[0010] Furthermore, the slag collecting box is threadedly connected to the screen.

[0011] Furthermore, a crushing mechanism is arranged above the grinding mechanism, and the crushing mechanism includes a hemispherical crushing block, which is fixedly mounted on the second grinding block and is provided with a plurality of evenly distributed first crushing protrusions, and a second crushing protrusion used in conjunction with the first crushing protrusion is arranged on the inner wall of the cylinder.

[0012] Furthermore, the second crushing protrusions and the first crushing protrusions are distributed alternately along the axial direction of the rotating shaft.

[0013] The beneficial effects of the utility model are as follows: the utility model has good practicality and working reliability, adopts a grinding mechanism to grind materials, and screens the ground materials through a screen, and materials with unqualified sizes are collected in a slag collection box. It can realize timely separation of qualified-size materials during the grinding process, so as to facilitate re-grinding of oversized materials after one grinding, and effectively reduce the repeated grinding of qualified-size materials resulting in undersized materials, thereby significantly improving the grinding efficiency and the quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the cylinder of the utility model.

[0016] In the figure:

[0017] 10. Cylinder, 20. Grinding mechanism, 21. First grinding block, 22. Second grinding block, 23. Rotating shaft, 24. Bearing seat, 25. Support frame, 30. Screen, 40. Slag collecting box, 50. Crushing mechanism, 51. Crushing block, 52. First crushing protrusion, 53. Second crushing protrusion. DETAILED DESCRIPTION

[0018] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0019] Example 1

[0020] like Figure 1-Figure 2As shown, a grinding device designed in this embodiment includes a cylinder 10 with an opening at the top and a grinding mechanism 20 arranged inside the cylinder 10. The grinding mechanism 20 includes a first grinding block 21, a second grinding block 22 used in conjunction with the first grinding block 21, and a rotatable shaft 23. The first grinding block 21 is fixedly mounted on the inner wall of the cylinder 10, the second grinding block 22 is fixedly connected to the shaft 23, and the shaft 23 is rotatably connected to the cylinder 10. A discharge port is provided at the bottom of the cylinder 10, and a funnel-shaped screen 30 is provided at the discharge port. A slag collecting box 40 is provided at the lowest point of the screen 30. The slag collecting box 40 is detachably connected to the screen 30, and a plurality of evenly distributed sieve holes are provided on the slag collecting box 40 and the screen 30.

[0021] That is, the inner wall of the first grinding block 21 and the outer wall of the second grinding block 22 are gap-matched, so that the material (alumina clinker) is ground. The ground material is screened by the screen 30, that is, the material with qualified size passes through the screen hole and is discharged. The screen 30 is set to be funnel-shaped, so that the material that cannot pass through the screen hole (unqualified size) slowly moves to the lowest point of the screen 30 under the action of gravity, and then is collected in the slag box 40. The operator regularly disassembles the slag box 40 and adds the material in it into the cylinder 10 again from the top opening of the cylinder 10, so as to realize multiple grinding of the material.

[0022] By adopting the above scheme, it is possible to separate materials of qualified size in time during the grinding process, so as to facilitate the re-grinding of oversized materials after one grinding, and effectively reduce the repeated grinding of materials of qualified size resulting in materials of too small size, thereby significantly improving the grinding efficiency and the quality of the finished product.

[0023] Preferably, one end of the rotating shaft 23 is fixedly connected to the motor shaft (not shown in the figure), and the other end is rotatably connected to the first grinding block 21 through the bearing seat 24 and the support frame 25. In the working state, the motor shaft drives the rotating shaft 23 to rotate, and the second grinding block 22 rotates with the rotating shaft 23, that is, rotates relative to the first grinding block 21, so as to grind the material.

[0024] Preferably, the slag box 40 is threadedly connected to the screen 30, which is convenient for the operator to regularly disassemble the slag box 40, and then add the material inside it into the cylinder 10 again from the top opening of 10, and re-grind the material that cannot pass through the screen hole through the grinding mechanism 20.

[0025] Example 2

[0026] The structure of this embodiment is basically similar to that of the embodiment 1, except that a crushing mechanism 50 is added to pre-crush the material.

[0027] like Figure 1-Figure 2As shown, a crushing mechanism 50 is arranged above the grinding mechanism 20, and the crushing mechanism 50 includes a hemispherical crushing block 51, and the crushing block 51 is fixedly mounted on the second grinding block 22, and a plurality of evenly distributed first crushing protrusions 52 are arranged on the crushing block 51, and a second crushing protrusion 53 used in conjunction with the first crushing protrusion 52 is arranged on the inner wall of the cylinder 10.

[0028] Through the coordinated action of the first crushing protrusion 52 on the crushing block 51 and the second crushing protrusion 53 on the inner wall of the cylinder 10, the material before entering the gap between the first grinding block 21 and the second grinding block 22 is pre-crushed, so that the size of the material entering between the first grinding block 21 and the second grinding block 22 is smaller, thereby further improving the grinding efficiency and effectively avoiding the situation where the material cannot enter the gap between the first grinding block 21 and the second grinding block 22.

[0029] Preferably, the second crushing protrusions 53 and the first crushing protrusions 52 are staggeredly distributed along the axial direction of the rotating shaft 23 to further improve the crushing efficiency and prevent the material from getting stuck.

[0030] The working principle of this embodiment is as follows:

[0031] First, the material (alumina clinker) is added into the cylinder 10 from the top opening of the cylinder 10, and the motor shaft drives the rotating shaft 23 to rotate. The first crushing protrusion 52 on the crushing block 51 and the second crushing protrusion 53 on the inner wall of the cylinder 10 work together to pre-crush the material before entering the first grinding block 21 and the second grinding block 22.

[0032] Then, the pre-crushed material enters the gap between the first grinding block 21 and the second grinding block 22, and is ground by the matched first grinding block 21 and the second grinding block 22. The ground material is screened by the screen 30, that is, the material with qualified size passes through the screen hole and is discharged, while the material with unqualified size is collected in the slag collecting box 40. The operator regularly disassembles the slag collecting box 40 and adds the material in it into the cylinder 10 again from the top opening of the cylinder 10, so that the material can be ground multiple times.

[0033] In the present utility model, the devices and components whose structures are not described are all commercially available devices or components.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A grinding device, characterized in that: The invention comprises a cylinder (10) with an opening at the top and a grinding mechanism (20) arranged inside the cylinder (10), wherein the grinding mechanism (20) comprises a first grinding block (21), a second grinding block (22) used in conjunction with the first grinding block (21), and a rotatable rotating shaft (23), wherein the first grinding block (21) is fixedly mounted on the inner wall of the cylinder (10), the second grinding block (22) is fixedly connected to the rotating shaft (23), the rotating shaft (23) is rotatably connected to the cylinder (10), a discharge port is provided at the bottom of the cylinder (10), a funnel-shaped screen (30) is provided at the discharge port, a slag collecting box (40) is provided at the lowest point of the screen (30), the slag collecting box (40) is detachably connected to the screen (30), and a plurality of evenly distributed sieve holes are provided on the slag collecting box (40) and the screen (30).

2. A grinding device according to claim 1, characterized in that: One end of the rotating shaft (23) is fixedly connected to the motor shaft, and the other end is rotatably connected to the first grinding block (21) through a bearing seat (24) and a support frame (25).

3. A grinding device according to claim 1, characterized in that: The slag collecting box (40) is threadedly connected to the screen (30).

4. A grinding device according to claim 1, characterized in that: A crushing mechanism (50) is arranged above the grinding mechanism (20), and the crushing mechanism (50) comprises a hemispherical crushing block (51). The crushing block (51) is fixedly mounted on the second grinding block (22), and a plurality of evenly distributed first crushing protrusions (52) are arranged on the crushing block (51). Second crushing protrusions (53) used in conjunction with the first crushing protrusions (52) are arranged on the inner wall of the cylinder (10).

5. A grinding device according to claim 4, characterized in that: The second crushing protrusions (53) and the first crushing protrusions (52) are distributed in a staggered manner along the axial direction of the rotating shaft (23).

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