A nail disc mill pulverizing and grading system

Abstract

This utility model discloses a nail disc mill crushing and grading system, relating to the field of crushing equipment technology, including: a nail disc mill, a dust collector, and a classifier. The nail disc mill is connected to a nail disc mill outlet pipe, which is connected to a first switching valve. The first switching valve is connected to a second switching valve via a straight discharge pipe. The nail disc mill is used to crush materials. The dust collector is connected to the second switching valve via a dust collector inlet pipe. A negative pressure fan is connected to the dust collector outlet, which generates a pressure difference to drive the powder in the nail disc mill to flow towards the dust collector. A first receiving container is provided at the lower end of the dust collector. The classifier is connected to a coarse powder outlet pipe, a fine powder outlet pipe, and a classification inlet pipe. The classification inlet pipe is connected to the first switching valve. The classifier is used to separate materials into coarse powder and fine powder. The fine powder outlet pipe is connected to the second switching valve. This utility model can reduce energy consumption during processing and improve production efficiency while ensuring qualified particle size.

Description

Technical Field

[0001] This utility model relates to the field of crushing equipment technology, and in particular to a nail disc mill crushing and grading system. Background Technology

[0002] In traditional grinding processes, particle size control relies on the mechanical grinding limit of a single disc mill. However, fluctuations in material properties (such as changes in the hardness of mineral raw materials, differences in polymer viscoelasticity, or fluctuations in material moisture content) often lead to fluctuations in the output particle size of the disc mill. Because the system lacks an online path switching mechanism, if the direct discharge mode is maintained continuously, sudden coarse powder will cause the particle size in subsequent processes to fail to meet requirements. If the classifier is continuously used, qualified fine powder is forced to undergo repeated sorting, leading to over-grinding and increased equipment energy consumption. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a nail-disc mill pulverizing and grading system that can reduce energy consumption during processing and improve production efficiency while ensuring qualified particle size.

[0004] A disc mill pulverizing and grading system according to a first aspect of this utility model includes: a disc mill, a dust collector, and a classifier. The disc mill is connected to a disc mill outlet pipe, and the disc mill outlet pipe is connected to a first switching valve. The first switching valve is connected to a second switching valve via a straight discharge pipe. The disc mill is used to pulverize materials. The dust collector is connected to the second switching valve via a dust collector inlet pipe. The dust collector outlet is connected to a negative pressure fan. The negative pressure fan is used to generate a pressure difference to drive the powder in the disc mill to flow into the dust collector. A first receiving container is provided at the lower end of the dust collector. The classifier is connected to a coarse powder outlet pipe, a fine powder outlet pipe, and a classification inlet pipe. The classification inlet pipe is connected to the first switching valve. The classifier is used to separate materials into coarse powder and fine powder. The fine powder outlet pipe is connected to the second switching valve, and the coarse powder outlet pipe is connected to a second receiving container.

[0005] A disc mill pulverizing and grading system according to an embodiment of this utility model has at least the following beneficial effects: Rapid path switching is achieved through a first switching valve and a second switching valve. The operating mode can be adjusted in real time according to the powder particle size without stopping the machine. When the powder particle size in the first receiving container is detected to be too large, the powder is switched to the classifier for separation, preventing unqualified powder from entering the final product. Under normal operating conditions, the powder directly enters the dust collector through the direct discharge pipe, bypassing the classifier, shortening the material handling path, reducing energy consumption and processing time, and significantly improving processing efficiency.

[0006] According to some embodiments of the present invention, the upper end of the nail disc mill is provided with a nail disc mill feeder, and the coarse powder collected by the second receiving container is transported to the nail disc mill feeder and re-crushed in the nail disc mill.

[0007] According to some embodiments of the present invention, both the first switching valve and the second switching valve are four-position four-way ball valves. The first switching valve is also connected to a vent pipe, and the second switching valve is connected to a compressed air pipe, which is connected to a compressed air source.

[0008] According to some embodiments of the present invention, the first switching valve and the second switching valve are pneumatically driven.

[0009] According to some embodiments of this utility model, the first switching valve and the second switching valve constitute a control valve group. The control valve group has a first state, a second state, and a third state. When the control valve group is in the first state, the first switching valve connects the nail disc mill outlet pipe and the straight discharge pipe, and the second switching valve connects the straight discharge pipe and the dust collector inlet pipe. When the control valve group is in the second state, the first switching valve connects the nail disc mill outlet pipe and the grading inlet pipe, and the second switching valve connects the fine powder outlet pipe and the dust collector inlet pipe. When the control valve group is in the third state, the first switching valve connects the vent pipe and the straight discharge pipe, and the second switching valve connects the straight discharge pipe and the compressed air pipe.

[0010] According to some embodiments of this utility model, a plug is detachably connected to the end of the vent pipe away from the first switching valve, and a compressed air valve is provided on the compressed air pipe.

[0011] According to some embodiments of this utility model, the first receiving container and the second receiving container are ton bags.

[0012] According to some embodiments of the present invention, the compressed air pipe is connected to the compressed air source via a quick connector.

[0013] According to some embodiments of this utility model, the lower end of the dust collector is connected to a fine powder discharge valve, and the coarse powder outlet pipe is connected to a coarse powder discharge valve.

[0014] According to some embodiments of this utility model, the dust collector is a bag filter dust collector.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of the installation structure of one embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of a first switching valve and a second switching valve according to an embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional schematic diagram of a straight pipe according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of a grading machine according to an embodiment of the present invention.

[0021] Icon labels:

[0022] 100-type nail disc mill, 110-type nail disc mill outlet pipe, 120-type nail disc mill feeder;

[0023] First switching valve 200, vent pipe 210, plug 211;

[0024] 300mm straight pipe;

[0025] Second switching valve 400, compressed air pipe 410, compressed air valve 411, quick connector 412;

[0026] Dust collector 500, dust collector inlet pipe 501, fine powder discharge valve 510;

[0027] 600 negative pressure fan;

[0028] First receiving container 700;

[0029] Classifier 800, coarse powder outlet pipe 810, coarse powder discharge valve 811, fine powder outlet pipe 820, classification inlet pipe 830;

[0030] Second receiving container 900. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] Reference Figures 1 to 4As shown, an embodiment of the present invention provides a nail disc mill pulverizing and grading system, comprising: a nail disc mill 100 connected to a nail disc mill outlet pipe 110, a first switching valve 200 connected to the nail disc mill outlet pipe 110, and the first switching valve 200 connected to a second switching valve 400 via a straight discharge pipe 300. The nail disc mill 100 is used to pulverize materials. It is foreseeable that the specific structure of the nail disc mill 100 is prior art, and the nail disc mill 100 can also be replaced by other pulverizing and grinding equipment. The dust collector 500 is connected to the second switching valve 400 through the dust collector inlet pipe 501. The dust collector 500 outlet is connected to a negative pressure fan 600, which is used to generate a pressure difference to drive the powder in the disc mill 100 to flow to the dust collector 500. The dust collector 500 is provided with a first receiving container 700 at its lower end. The classifier 800 is connected to a coarse powder outlet pipe 810, a fine powder outlet pipe 820, and a classification inlet pipe 830. The classification inlet pipe 830 is connected to the first switching valve 200. The classifier 800 is used to separate the material into coarse powder and fine powder. The specific structure of the classifier 800 is prior art and has been disclosed in patents with publication numbers CN2239302Y, CN201216997Y, CN201558812U, etc., so it will not be described in detail here. The fine powder outlet pipe 820 is connected to the second switching valve 400, and the coarse powder outlet pipe 810 is connected to the second receiving container 900. During normal operation, the negative pressure fan 600 generates negative pressure within the dust collector 500, drawing in the powder pulverized by the disc mill 100. The powder enters the dust collector 500 through the straight discharge pipe 300, where it is intercepted and collected before being transported to the first receiving container 700. When the powder particle size exceeds the process requirements, the powder pulverized by the disc mill 100 is drawn into the classifier 800 through the classifying inlet pipe 830 for separation. Powder with a particle size smaller than the preset value enters the dust collector 500 through the fine powder outlet pipe 820, where it is intercepted and collected before being transported to the first receiving container 700. Powder with a particle size larger than the preset value enters the second receiving container 900 through the coarse powder outlet pipe 810. The path can be quickly switched via the first switching valve 200 and the second switching valve 400. The operating mode can be adjusted in real time according to the powder particle size without stopping the machine. For example, when the powder particle size in the first receiving container 700 is detected to be too large, the powder is switched to the classifier 800 for separation, preventing unqualified powder from entering the final product. Under normal operation, the powder enters the dust collector 500 directly through the direct discharge pipe 300, bypassing the classifier 800, shortening the material handling path, reducing energy consumption and processing time, and significantly improving processing efficiency.

[0036] Reference Figures 1 to 3As shown, the disc mill 100 is equipped with a disc mill feeder 120. The coarse powder collected by the second receiving container 900 is transported to the disc mill feeder 120 by manual labor, pneumatic conveying, or mechanical screw conveyor, and then enters the disc mill 100 for re-grinding. The separately collected coarse powder is not discarded as waste but returned to the disc mill 100 for secondary grinding. The coarse powder undergoes multiple cycles of grinding until the target particle size is reached, thereby reducing raw material waste and improving resource utilization. Because the battery cathode material has stringent requirements for particle size distribution, multiple cycles ensure the consistency of fine powder particle size.

[0037] Reference Figures 1 to 3 As shown, both the first switching valve 200 and the second switching valve 400 are four-position four-way ball valves. The first switching valve 200 is also connected to a vent pipe 210, and the second switching valve 400 is connected to a compressed air pipe 410, which is connected to a compressed air source. The multi-channel characteristic of the four-position four-way ball valve allows for complex switching of material paths through a single valve body. The ball valve has a large flow area and is not prone to clogging. The valve core inside the ball valve is L-shaped. The vent pipe 210 provides an emergency depressurization and unclogging channel. When material accumulates and clogs the pipeline or valve, the valve can be switched to the vent pipe 210 to connect with other pipelines, quickly clearing the trapped powder. The compressed air source connected through the second switching valve 400 can be used to backflush the pipeline and equipment after work or when a blockage occurs, blowing out the powder adhering to the blockage from the vent pipe 210.

[0038] Reference Figures 1 to 3 As shown, it can be understood that the first switching valve 200 and the second switching valve 400 are pneumatically driven. Pneumatic valves are driven by compressed air, requiring no electricity and posing no risk of electrical sparks. They are suitable for flammable and explosive environments, reducing the risk of dust explosions.

[0039] Reference Figures 1 to 3As shown, it can be understood that the first switching valve 200 and the second switching valve 400 constitute a control valve group. The control valve group has a first state, a second state, and a third state. When the control valve group is in the first state, the first switching valve 200 connects the nail disc mill outlet pipe 110 and the straight discharge pipe 300, and the second switching valve 400 connects the straight discharge pipe 300 and the dust collector inlet pipe 501. During normal operation, the control valve group is in the first state. When the control valve group is in the second state, the first switching valve 200 connects the nail disc mill outlet pipe 110 and the classification inlet pipe 830, and the second switching valve 400 connects the fine powder outlet pipe 820 and the dust collector inlet pipe 501. When the particle size of the pulverized material is unqualified, the control valve group switches to the second state to sort the powder, separating and conveying the powder with qualified particle size to the dust collector 500. When the control valve assembly is in the third state, the first switching valve 200 connects the vent pipe 210 and the straight discharge pipe 300, and the second switching valve 400 connects the straight discharge pipe 300 and the compressed air pipe 410. When the straight discharge pipe 300 is blocked by material, the control valve assembly switches to the third state, and the compressed air pipe 410 inputs compressed air into the straight discharge pipe 300. The compressed air carries the powdered material and is discharged from the vent pipe 210 to achieve the purpose of unblocking. The control valve assembly also has a fourth and a fifth state. When the control valve assembly is in the fourth state, the first switching valve 200 connects the nail disc mill outlet pipe 110 and the straight discharge pipe 300, and the second switching valve 400 connects the straight discharge pipe 300 and the compressed air pipe 410. When the nail disc mill outlet pipe 110 is blocked, the control valve assembly switches to the fourth state, and the compressed air pipe 410 inputs compressed air into the straight discharge pipe 300. The compressed air enters the nail disc mill outlet pipe 110 for backflushing to unblock the nail disc mill outlet pipe 110. When the control valve assembly is in the fifth state, the first switching valve 200 connects the classifying inlet pipe 830 and the direct discharge pipe 300, and the second switching valve 400 connects the fine powder outlet pipe 820 and the compressed air pipe 410. When either the classifying inlet pipe 830 or the fine powder outlet pipe 820 is blocked, the control valve assembly switches to the fifth state, and compressed air is injected into the fine powder outlet pipe 820 through the compressed air pipe 410. The compressed air then enters the classifier 800, flows in the reverse direction into the classifying inlet pipe 830, and is then blown out through the direct discharge pipe 300, thereby carrying away the powder blocking the classifying inlet pipe 830 or the fine powder outlet pipe 820. It is foreseeable that when it is uncertain which pipe is blocked, compressed air can be continuously supplied to the compressed air pipe 410, and the control valve assembly can be switched back and forth between the third, fourth, and fifth states until the pipe is cleared. This clearing method is suitable for automated control, replacing the need for hours of manual downtime for fault handling with online completion via valve switching.

[0040] Reference Figures 1 to 3As shown, it can be understood that a plug 211 is detachably connected to the end of the vent pipe 210 away from the first switching valve 200. The plug 211 is threadedly connected to the vent pipe 210. Under normal circumstances, the first switching valve 200 itself is sufficient to provide a good seal to prevent air from flowing through the vent pipe 210 during operation. However, the plug 211 is provided to facilitate the closure of the vent pipe 210 for operation during maintenance. A compressed air valve 411 is provided on the compressed air pipe 410. The compressed air valve 411 is closed when there is no blockage to reduce compressed air leakage.

[0041] Reference Figure 1 As shown, it can be understood that the first receiving container 700 and the second receiving container 900 are ton bags. When the dust collector 500 or the classifier 800 discharges material, the ton bags automatically receive the powder through gravity self-tensioning. The ton bags containing coarse powder are directly fed by a forklift to the disc mill feeder 120 to achieve circulation, and the material can be recycled without the need for transfer equipment.

[0042] Reference Figures 1 to 3 As shown, it can be understood that the compressed air pipe 410 is connected to the compressed air source via a quick connector 412. The quick connector 412 allows for easy disconnection and reconnection between the compressed air source and the compressed air pipe 410. The specific structure of the quick connector 412 is prior art and will not be described in detail. The compressed air source can be a portable air compressor. When it is not necessary to clean clogged materials, or when the pipes need to be acid-washed after handling corrosive materials, the compressed air pipe 410 can be separated from the air compressor via the quick connector 412 to facilitate the relocation of the air compressor to another location.

[0043] It is foreseeable that there will be two 800 classifiers connected in series to separate materials of different particle sizes.

[0044] Reference Figures 1 to 3 As shown, it can be understood that the lower end of the dust collector 500 is connected to a fine powder discharge valve 510, and the coarse powder outlet pipe 810 is connected to a coarse powder discharge valve 811. Both the fine powder discharge valve 510 and the coarse powder discharge valve 811 are rotary valves, which achieve quantitative material discharge through impeller rotation, while preventing air from being drawn into the negative pressure system and causing pressure imbalance. The specific structure of the rotary valve is existing technology and will not be described in detail.

[0045] Reference Figure 1 As shown, it can be understood that the dust collector 500 is a bag filter dust collector. Bag filters have high dust removal efficiency, can thoroughly filter powder, and can discharge continuously.

[0046] Operating Procedures: During normal operation, the control valve assembly is in the first state. The first switching valve 200 connects the nail-disc mill outlet pipe 110 and the grading inlet pipe 830, and the second switching valve 400 connects the fine powder outlet pipe 820 and the dust collector inlet pipe 501. When the pulverized particle size is unqualified, the control valve assembly switches to the second state to sort the powder, separating and conveying the qualified powder to the dust collector 500. When the direct discharge pipe 300 is blocked by material, the control valve assembly switches to the third state, and compressed air is input into the direct discharge pipe 300 through the compressed air pipe 410. The compressed air carries the powder material and is discharged from the exhaust pipe 210 to clear the blockage. When the nail-disc mill outlet pipe 110 is blocked, the control valve assembly switches to the fourth state, with the first switching valve 200 connecting the nail-disc mill outlet pipe 110 and the direct discharge pipe 300, and the second switching valve 400 connecting the direct discharge pipe 300 and the compressed air pipe 410. Compressed air is input into the straight discharge pipe 300 via compressed air pipe 410. The compressed air then enters the nail disc mill outlet pipe 110 for backflushing to clear the blockage. When the classifying inlet pipe 830 or the fine powder outlet pipe 820 is blocked, the control valve group switches to the fifth state. The first switching valve 200 connects the classifying inlet pipe 830 and the straight discharge pipe 300, and the second switching valve 400 connects the fine powder outlet pipe 820 and the compressed air pipe 410. Compressed air is injected into the fine powder outlet pipe 820 via compressed air pipe 410. The compressed air then enters the classifier 800, then flows in reverse into the classifying inlet pipe 830, and finally is blown out from the straight discharge pipe 300, thereby carrying away the powder blocking the classifying inlet pipe 830 or the fine powder outlet pipe 820.

[0047] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A nail disc mill pulverizing and grading system, characterized in that, include: A nail disc mill (100) is connected to a nail disc mill outlet pipe (110), and the nail disc mill outlet pipe (110) is connected to a first switching valve (200). The first switching valve (200) is connected to a second switching valve (400) through a straight discharge pipe (300). The nail disc mill (100) is used to crush materials. A dust collector (500) is connected to the second switching valve (400) through a dust collector inlet pipe (501). A negative pressure fan (600) is connected to the outlet of the dust collector (500). The negative pressure fan (600) is used to generate a pressure difference to drive the powder in the disc mill (100) to flow to the dust collector (500). A first receiving container (700) is provided at the lower end of the dust collector (500). A classifier (800) is connected to a coarse powder outlet pipe (810), a fine powder outlet pipe (820), and a classification inlet pipe (830). The classification inlet pipe (830) is connected to the first switching valve (200). The classifier (800) is used to separate materials into coarse powder and fine powder. The fine powder outlet pipe (820) is connected to the second switching valve (400). The coarse powder outlet pipe (810) is connected to a second receiving container (900).

2. The nail disc mill pulverizing and grading system according to claim 1, characterized in that: The upper end of the nail-disc mill (100) is provided with a nail-disc mill feeder (120). The coarse powder collected by the second receiving container (900) is transported to the nail-disc mill feeder (120) and re-crushed in the nail-disc mill (100).

3. The nail disc mill pulverizing and grading system according to claim 1, characterized in that: Both the first switching valve (200) and the second switching valve (400) are four-position four-way ball valves. The first switching valve (200) is also connected to an vent pipe (210), and the second switching valve (400) is connected to a compressed air pipe (410), which is connected to a compressed air source.

4. The nail disc mill pulverizing and grading system according to claim 3, characterized in that: The first switching valve (200) and the second switching valve (400) are pneumatically driven.

5. The nail disc mill pulverizing and classifying system according to claim 3, characterized in that: The first switching valve (200) and the second switching valve (400) form a control valve group. The control valve group has a first state, a second state, and a third state. When the control valve group is in the first state, the first switching valve (200) connects the nail disc mill outlet pipe (110) and the direct discharge pipe (300), and the second switching valve (400) connects the direct discharge pipe (300) and the dust collector inlet pipe (501). When the control valve group is in the second state, the first... The switching valve (200) connects the nail disc mill outlet pipe (110) and the grading inlet pipe (830), and the second switching valve (400) connects the fine powder outlet pipe (820) and the dust collector inlet pipe (501). When the control valve group is in the third state, the first switching valve (200) connects the vent pipe (210) and the direct discharge pipe (300), and the second switching valve (400) connects the direct discharge pipe (300) and the compressed air pipe (410).

6. The nail disc mill pulverizing and grading system according to claim 5, characterized in that: The end of the vent pipe (210) away from the first switching valve (200) is detachably connected to a plug (211), and a compressed air valve (411) is provided on the compressed air pipe (410).

7. The nail disc mill pulverizing and grading system according to claim 6, characterized in that: The first receiving container (700) and the second receiving container (900) are ton bags.

8. The nail disc mill pulverizing and grading system according to claim 7, characterized in that: The compressed air pipe (410) is connected to the compressed air source via a quick connector (412).

9. The nail disc mill pulverizing and grading system according to claim 8, characterized in that: The dust collector (500) is connected to a fine powder discharge valve (510) at its lower end, and the coarse powder outlet pipe (810) is connected to a coarse powder discharge valve (811).

10. The nail disc mill pulverizing and grading system according to claim 1, characterized in that: The dust collector (500) is a bag filter.

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