Particle size controllable grinding bowl

Abstract

The utility model discloses a controllable granularity grinding bowl belongs to the technical field of grinding equipment, including grinding cavity, the bottom of grinding cavity is equipped with the screening component for controlling the granular degree of discharge, the screen hole of screening component is opened to the screen hole of grinding cavity. In the grinding process, through the limitation of screen hole, make the material of granularity reach within the screen hole specification can be automatically discharged under the action of gravity. Compared with the discharge mode of the side wall of grinding cavity in the prior art, the utility model is more smooth, does not need external force drive, and the requirement of grinding equipment is lower, and the material is discharged completely from the bottom of the grinding bowl, which is more conducive to. In addition, by replacing the screen of different specifications screen hole, different discharge granularity requirements can be adapted.

Description

Technical Field

[0001] This utility model mainly relates to the field of grinding device technology, specifically a grinding bowl with controllable particle size. Background Technology

[0002] Currently, existing grinding bowls discharge material through gaps in their side walls. For example, the applicant disclosed a grinding bowl in a prior patent application (authorization announcement number CN 207805769 U). This grinding bowl has a bottom plate that seals the grinding chamber, and several impact blocks are fixed in layers within the chamber. A fixed-diameter discharge gap is provided between adjacent impact blocks and between the top impact block and the top wall of the grinding chamber. A discharge groove is provided on the side wall of the grinding bowl, and the discharge gap and the discharge groove are interconnected. However, since the discharge gaps are all located on the periphery of the grinding bowl, and the material is downward under gravity, the material needs external force to move outward for smooth discharge, placing high demands on the grinding equipment. Furthermore, the ground material is difficult to discharge and cannot be completely discharged under gravity. Utility Model Content

[0003] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing grinding bowls are too simplistic. It mainly provides a grinding bowl with controllable particle size to solve the technical problems mentioned in the background art, such as the high requirements for grinding equipment and the difficulty in completely discharging materials.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A particle size controllable grinding bowl includes a grinding chamber, and a screening component for controlling the output particle size is provided at the bottom of the grinding chamber. The screening component has sieve holes that communicate with the grinding chamber.

[0005] Preferably, the screening component includes a detachably mounted screen.

[0006] Furthermore, the screening component includes a plate and a screen, the screen being detachably mounted on the plate, and the plate being detachably mounted to the side wall of the grinding bowl.

[0007] As one embodiment of the above solution, the plate includes a grinding chamber bottom plate, a first opening is provided on the grinding chamber bottom plate, and the screen is installed on the lower side of the grinding chamber bottom plate.

[0008] Furthermore, the grinding chamber is equipped with a grinding hammer and a grinding ring, one end face of the bottom plate of the grinding chamber is in contact with the grinding hammer and the grinding ring, and there is a gap between the screen and the grinding hammer and the grinding ring.

[0009] As an improvement to the above embodiment, the plate also includes a screen cover plate, the screen being held between the grinding chamber bottom plate and the screen cover plate, and the screen cover plate having a second opening.

[0010] Specifically, the number of the second port is at least one.

[0011] Furthermore, the grinding chamber bottom plate, the screen, and the screen cover are connected together by screws.

[0012] Preferably, the bottom surface of the grinding chamber bottom plate is uniformly provided with threaded blind holes for screws to be screwed in, and the screen cover plate is provided with small through holes corresponding to the threaded blind holes.

[0013] Furthermore, the bottom plate of the grinding chamber and the outer side of the screen cover are both formed with second protrusions, which are connected to the side wall of the grinding bowl by bolts.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention features a sieving component, including a screen, at the bottom of the grinding chamber. During the grinding process, the screen openings restrict the material's particle size, allowing it to be automatically discharged under gravity. Compared to existing methods where material exits from the side wall of the grinding chamber, this invention provides smoother discharge, requires no external force, and places lower demands on the grinding equipment. Furthermore, discharging from the bottom of the grinding bowl facilitates complete material removal. Additionally, by replacing the screens with different mesh sizes, it can accommodate various particle size requirements.

[0015] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a longitudinal sectional view of the present invention; Figure 2 This is a schematic diagram of the sieve plate structure in the present invention in a component separation state; Figure 3 This is a top view of the screen in this utility model; Figure 4 This is a top view of the screen cover plate in this utility model.

[0017] Reference numerals in the attached drawings: 1. Grinding chamber cover plate; 2. Feed pipe; 3. Grinding pad; 4. Grinding chamber ring; 5. Grinding chamber bottom plate; 51. First through-hole; 52. Threaded blind hole; 6. Screen cover plate; 61. Second through-hole; 62. Small through-hole; 63. Second protrusion; 7. Grinding hammer; 8. Screen; 9. Grinding ring; 10. Grinding screen ring. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Example: Please refer to the appendix for details. Figure 1 A particle size controllable grinding bowl includes a grinding chamber, and a screening component for controlling the output particle size is provided at the bottom of the grinding chamber. The screening component has sieve holes that communicate with the grinding chamber.

[0022] Furthermore, the aforementioned particle size controllable grinding bowl includes a grinding chamber cover plate 1, a feed pipe 2, a grinding chamber side wall, a sieve plate, a grinding hammer 7, and a grinding ring 9. The bottom of the grinding chamber is provided with a sieve plate for discharging material, and the sieve plate has sieve holes. The sieve plate and the grinding chamber side wall are fixedly connected to the bottom of the grinding chamber cover plate 1 by long bolts. The feed pipe 2 is connected through the grinding chamber cover plate 1. The grinding chamber is provided with a grinding hammer 7 and a grinding ring 9, and the grinding ring 9 is sleeved on the outside of the grinding hammer 7.

[0023] In application, the material enters the grinding chamber through the feed pipe 2. Under the action of external driving force, the grinding hammer 7 and the grinding ring 9 collide with the side wall of the grinding chamber to crush (grind) the material. During the grinding process, the material with a particle size within the sieve hole diameter can automatically pass through the sieve plate under the action of gravity to achieve discharge, making the discharge smoother. No external driving force is required, and the requirements for the grinding equipment are lower. At the same time, the material is discharged from the bottom of the grinding bowl, which is more conducive to the complete discharge of the material.

[0024] When a sample with a particle size of 0.2 mm requires 100% sieving, but excessively fine particles (e.g., below 0.1 mm) cannot be excessive, the impact force between the grinding hammer 7 and grinding ring 9 and the sidewall of the grinding chamber can be reduced by decreasing the motor speed in the grinding equipment. This effectively controls the amount of sample below 0.1 mm, preventing the sample fineness from becoming excessively fine. For example, currently, when applying G-value testing to samples, the national standard requires all coal samples with a particle size of 0.2 mm to be sieved, and the proportion of particles between 0.1 and 0.2 mm to be 20%–35% (if the sample does not reach this range, such as less than 20%, the detected G-value (caking index) will be too high, and vice versa). The control parameters of the motor in the grinding equipment are reduced to 50Hz and 1440 rpm. The motor control parameters for different coal types can be determined through testing.

[0025] Please refer to the attached document carefully. Figure 2 -Appendix Figure 4 The sieve plate includes a grinding chamber bottom plate 5, a sieve cover plate 6, and a sieve 8 sandwiched between the two. The grinding chamber bottom plate 5 has a first opening 51, and the sieve cover plate 6 has a second opening 61. The first opening 51 and the second opening 61 correspond to and are aligned to facilitate the material passing through the sieve 8 for discharge. The grinding chamber bottom plate 5, the sieve cover plate 6, and the sieve 8 are overlapped and connected by screws, realizing the detachable installation of the sieve 8, which is convenient to replace the sieve 8 of the corresponding specification according to the target particle size. At the same time, the grinding chamber bottom plate 5 is in contact with the grinding hammer 7 and the grinding ring 9, and there is a gap between the sieve 8 and the grinding hammer 7 and the grinding ring 9, so that the sieve 8 is not easily worn.

[0026] Please refer to the attached document carefully. Figure 2 -Appendix Figure 4 The bottom surface of the grinding chamber bottom plate 5 is evenly provided with threaded blind holes 52 for screws to be screwed in. The screen cover plate 6 is provided with small through holes 62 that correspond one-to-one with the threaded blind holes 52. The screw passes through the small through holes 62 from below the screen cover plate 6, then through the edge of the screen 8, and finally screws into the threaded blind holes 52.

[0027] Please refer to the attached document carefully. Figure 1 and attached Figure 4 The outer sides of the grinding chamber bottom plate 5 and the screen cover plate 6 are each formed with three second protrusions 63 distributed at equal angles. The second protrusions 63 are provided with large through holes for long bolts to pass through. The long bolts pass through the second protrusions 63, the grinding pad 3, the first protrusion and the grinding chamber cover plate 1 in sequence from below the screen cover plate 6, and are tightened with nuts.

[0028] Please refer to the attached document carefully. Figure 1The sidewall of the grinding chamber is formed by three grinding screen rings 10 and two grinding chamber rings 4 overlapping each other in an alternating manner; each grinding chamber ring 4 has three first protrusions distributed at equal angles on its outer side, and each grinding screen ring 10 has three grinding pads 3 distributed at equal angles on its outer side, and each grinding pad 3 is clamped between the first protrusions of the upper and lower grinding chamber rings 4. Both the first protrusions and the grinding pads 3 have large through holes for long bolts to pass through.

[0029] In another embodiment, a discharge gap matching the aperture of the screen 8 can be formed between each layer of grinding screen ring 10 and grinding chamber ring 4 to cooperate with the screen 8 to achieve dual discharge and promote discharge efficiency.

[0030] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A grinding bowl with controllable particle size, comprising a grinding chamber, characterized in that: The bottom of the grinding chamber is provided with a screening component for controlling the output particle size. The screening component has a screen hole that communicates with the grinding chamber. The screening component includes a detachable screen (8).

2. The particle size controllable grinding bowl according to claim 1, characterized in that: The screening component includes a plate and a screen (8), the screen (8) being detachably mounted on the plate, and the plate being detachably mounted to the side wall of the grinding bowl.

3. The particle size controllable grinding bowl according to claim 2, characterized in that: The plate includes a grinding chamber bottom plate (5), on which a first opening (51) is provided, and the screen (8) is installed on the underside of the grinding chamber bottom plate (5).

4. The particle size controllable grinding bowl according to claim 3, characterized in that: The grinding chamber is equipped with a grinding hammer (7) and a grinding ring (9). One end face of the bottom plate (5) of the grinding chamber is in contact with the grinding hammer (7) and the grinding ring (9). There is a gap between the screen (8) and the grinding hammer (7) and the grinding ring (9).

5. The particle size controllable grinding bowl according to claim 4, characterized in that: The plate also includes a screen cover plate (6), the screen (8) is held between the grinding chamber bottom plate (5) and the screen cover plate (6), and the screen cover plate (6) has a second opening (61).

6. The particle size controllable grinding bowl according to claim 5, characterized in that: The number of the second port (61) is at least one.

7. The particle size controllable grinding bowl according to claim 5, characterized in that: The grinding chamber bottom plate (5), the screen (8) and the screen cover plate (6) are connected together by screws.

8. The particle size controllable grinding bowl according to claim 7, characterized in that: The bottom surface of the grinding chamber bottom plate (5) is evenly provided with threaded blind holes (52) for screws to be screwed in, and the screen cover plate (6) is provided with small through holes (62) corresponding to the threaded blind holes (52).

9. A grinding bowl with controllable particle size according to claim 7, characterized in that: The grinding chamber bottom plate (5) and the screen cover plate (6) are both formed with a second protrusion (63) on the outside. The second protrusion (63) is connected to the side wall of the grinding bowl by bolts.

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