A vertical roller mill for producing graphite negative electrode

Abstract

The utility model relates to a vertical roller mill for graphite negative electrode production, comprising a vertical machine body, a feed hopper, a main support frame, a roller body, a collection box, and an air supply mechanism, wherein the feed hopper is arranged above the vertical machine body, the roller body is horizontally arranged in the main support frame, a collection box is arranged below the roller body, the roller body comprises a multi-layer roller body arranged in the vertical direction, the multi-layer roller body is fixed on the main support frame through a roller bracket, and the air supply mechanism is respectively arranged on the top of the vertical machine body and in the collection box. The utility model can realize multi-stage roller pressing, and ensure the consistency of material crushing after roller pressing to the greatest extent, and can avoid the occurrence of inconsistent material crushing caused by roller system axis deviation.

Description

Technical Field

[0001] The utility model relates to the technical field of roller mills, in particular to a vertical roller mill for producing graphite negative electrodes. Background Art

[0002] The vertical roller mill is a large-scale, efficient grinding equipment that integrates grinding, air drying and grading. It mainly includes a frame, a roller system, a transmission device, an air supply system and a roller grinding device. Before grinding, the material falls from the feed port to the roller system that is driven by a motor to rotate. One of the two roller systems is a fixed roller and the other is an active roller. When the roller mill is running, the active roller approaches the fixed roller, generating a huge pressure between the two roller systems, thereby crushing the material. Subsequently, the finer material being ground is blown to the separator by the air supply system. The particles that meet the particle size standards move with the wind, pass through the separator, and are collected as finished products by the dust removal equipment. The particles that do not meet the particle size standards are intercepted by the separator, fall back to the grinding roller, and are re-ground together with the newly-added material until the particle size meets the standard. Based on this unique structure, the vertical roller mill integrates grinding, drying and grading in an integrated design. By adjusting the rotation speed, the coarseness and fineness required by different products can be achieved, and the qualified fine powder in the vertical roller mill can be extracted in time, avoiding the occurrence of over-grinding, while also reducing the waste of energy. It can also continuously process materials and continuously produce the required products in an uninterrupted production process, which can meet the requirements of large-scale production and improve production efficiency. Therefore, the vertical roller mill has been widely used in actual production processes.

[0003] In the preparation process of graphite negative electrode materials, a vertical roller mill is needed to grind the graphite. The existing vertical roller mill only has one-stage rolling, which makes it difficult to ensure the consistency of material crushing after rolling. In addition, the bearing brackets of the two roller systems are fixed separately, which is easy to cause axial deviation, resulting in inconsistent material crushing degree at different positions of the roller system.

[0004] Chinese patent CN215140399U discloses a lithium battery negative electrode graphite raw material pulverizing device, which includes a first pulverizing roller and a second pulverizing roller, the pulverizing motor drives the pulverizing roller gear to rotate through the first transmission belt, so that the pulverizing roller gear rotates and the first pulverizing roller rotates synchronously at the same time, the pulverizing motor drives the driving gear to rotate through the second transmission belt, the driving gear and the driven gear are meshed, and then the driven gear is driven to rotate by the driving gear, and finally the second pulverizing roller is driven to rotate synchronously. However, only one level of rolling is set in this scheme, and when the material is ground, it falls to the screening conveyor belt, which makes it difficult to ensure the consistency of material crushing after rolling. Another Chinese patent CN117123308A discloses a lithium battery negative electrode material preparation device and a preparation method thereof, although multiple grinding rollers are set, the multiple grinding rollers are arranged side by side, and the multiple grinding rollers belong to the same level of rolling, which still makes it difficult to ensure the consistency of material crushing after rolling. Therefore, there is a lot of room for improvement. In addition, the bearing brackets of the roller system in the above-mentioned prior art are fixed separately, which is easy to cause axial deviation, resulting in inconsistent material crushing degree at different positions of the roller system.

[0005] Therefore, how to achieve multi-stage roller pressing to maximize the consistency of material crushing after roller pressing, and how to avoid roller axis deviation have become technical problems to be solved. Utility Model Content

[0006] The utility model aims to provide a vertical roller mill for graphite negative electrode production to solve the deficiencies in the prior art. The technical problem to be solved by the utility model is achieved through the following technical solutions.

[0007] A vertical roller mill for producing graphite negative electrodes comprises a vertical machine body, a feed hopper, a main support frame, a roller body, a collection box, and an air supply mechanism. The feed hopper is arranged above the vertical machine body, the roller body is horizontally arranged in the main support frame, and the collection box is arranged below the roller body. The roller body comprises a multi-layer roller body arranged in a vertical direction, and the multi-layer roller body is fixed to the main support frame by a roller bracket. The air supply mechanism is respectively arranged on the top of the vertical machine body and in the collection box.

[0008] Preferably, the air supply mechanism located at the top of the vertical machine body is a centrifugal fan, and the air supply mechanism located in the collecting box is a negative pressure fan.

[0009] Preferably, the centrifugal fan is divided into a left centrifugal fan and a right centrifugal fan, which are respectively located on both sides of the top of the vertical body.

[0010] Preferably, the multi-layer roller body has four layers, which are respectively a first roller body, a second roller body, a third roller body, and a fourth roller body from top to bottom.

[0011] Preferably, a roller motor is provided on the outside of the roller bracket, the roller motor is located on the outside of the vertical machine body, and is connected to the roller bracket through a transmission shaft.

[0012] Preferably, each layer of roller bodies includes a driving roller and a driven roller.

[0013] Preferably, there are two roller brackets, namely an active roller bracket and a driven roller bracket, which are semicircular in shape. The semicircular roller brackets respectively wrap the active roller and the driven roller. One side of the two roller brackets is fixedly connected together by a load-bearing connecting frame and fixed to the main support frame.

[0014] Preferably, one side of the two roller supports is welded and connected via a load-bearing connecting frame.

[0015] Preferably, the other sides of the two roller supports are connected by a hydraulic connecting rod, one end of the hydraulic connecting rod is welded and fixed to the driven roller support, and the other end is sleeved with the active roller support by a transmission shaft.

[0016] Preferably, a roller bearing is provided at the center of the active roller, and the roller bearing is connected to the roller motor through the transmission shaft.

[0017] Preferably, a sleeve ring is further provided on the outer side of the roller bearing.

[0018] Preferably, a material guide plate is provided below the feed hopper, and the material guide plate is obliquely arranged above the multi-layer roller body.

[0019] In the utility model, in the preparation process of graphite negative electrode materials, by setting up a multi-layer roller body, it is possible to achieve multi-layer grinding of materials, ensure that the particle size of the powder after grinding is the same, and avoid the problem of inconsistent powder size caused by a layer of roller body. The air supply mechanism is divided into a centrifugal fan located above the vertical body and a negative pressure fan located in the collecting box. The arrangement of multiple fans at different positions can not only ensure that the powder after grinding enters the separator, but also avoid the accumulation of powder caused by dead corners in the vertical body. The active roller and the driven roller are fixed in the roller bracket through a load-bearing connecting frame, so that when the roller mill is working, the axes of the active roller and the driven roller do not deviate relative to each other, further improving the crushing accuracy and the consistency of the powder. The guide plate arranged obliquely below the feed hopper can transport the material to the oblique upper side of the roller, so that the material can be better crushed by the roller, thereby improving the crushing efficiency.

[0020] The utility model provides a vertical roller mill for graphite negative electrode production. By arranging multi-stage roller pressing, the consistency of material crushing after roller pressing can be guaranteed to the greatest extent. The active roller and the driven roller are fixed together by a load-bearing connecting frame to prevent the occurrence of roller system shaft deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the overall structure of the vertical roller mill of the utility model;

[0022] Figure 2 It is a cross-sectional schematic diagram of the roller support of the utility model;

[0023] The reference numerals in the accompanying drawings are: 1, vertical machine body, 2, feed hopper, 3, main support frame, 4, collecting box, 5, first roller body, 6, second roller body, 7, third roller body, 8, fourth roller body, 9, roller bracket, 10, roller motor, 11, transmission shaft, 12, negative pressure fan, 13, left centrifugal fan, 14, right centrifugal fan; 15, active roller bracket, 16, driven roller bracket, 17, active roller, 18, driven roller, 19, load-bearing connecting frame, 20, hydraulic connecting rod, 21, sleeve ring, 22, roller bearing. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] Embodiment 1:

[0026] like Figure 1 As shown, a vertical roller mill for graphite negative electrode production includes a vertical machine body, a feed hopper, a main support frame, a roller body, a collection box, and an air supply mechanism. The feed hopper is arranged above the vertical machine body, the roller body is horizontally arranged in the main support frame, and the collection box is arranged below the roller body. The roller body includes a multi-layer roller body arranged in the vertical direction, and the multi-layer roller body is fixed to the main support frame through a roller bracket, and the air supply mechanism is respectively arranged on the top of the vertical machine body and in the collection box.

[0027] Furthermore, the air supply mechanism located at the top of the vertical machine body is a centrifugal fan, and the air supply mechanism located in the collecting box is a negative pressure fan.

[0028] Furthermore, the centrifugal fan is divided into a left centrifugal fan and a right centrifugal fan, which are respectively located on both sides of the top of the vertical body.

[0029] Furthermore, the multi-layer roller body has four layers, which are respectively a first roller body, a second roller body, a third roller body, and a fourth roller body from top to bottom.

[0030] Furthermore, a roller motor is provided on the outside of the roller bracket. The roller motor is located on the outside of the vertical machine body and is connected to the roller bracket through a transmission shaft.

[0031] In the utility model, in the preparation process of graphite negative electrode material, by setting up a multi-layer roller body, multi-layer grinding of materials can be achieved, ensuring that the particle size of the powder after grinding is the same, and avoiding the problem of inconsistent particle size of the powder caused by a layer of roller body. The air supply mechanism is divided into a centrifugal fan located above the vertical body and a negative pressure fan located in the collection box. The setting mode of multiple fans at different positions can not only ensure that the powder after grinding enters the separator, but also avoid the accumulation of powder caused by the dead corner of the vertical body.

[0032] Embodiment 2:

[0033] like Figure 2 As shown, based on Example 1, each layer of the roller body includes a driving roller and a driven roller.

[0034] Furthermore, there are two roller brackets, namely an active roller bracket and a driven roller bracket, which are semicircular in shape. The semicircular roller brackets wrap the active roller and the driven roller respectively. One side of the two roller brackets is fixedly connected together by a load-bearing connecting frame and fixed to the main support frame.

[0035] Furthermore, one side of the two roller brackets is welded and connected via a load-bearing connecting frame.

[0036] Furthermore, the other sides of the two roller supports are connected by a hydraulic connecting rod, one end of the hydraulic connecting rod is welded and fixed to the driven roller support, and the other end is sleeved with the active roller support by a transmission shaft.

[0037] Furthermore, a roller bearing is provided at the center of the active roller, and the roller bearing is connected to the roller motor through the transmission shaft.

[0038] Furthermore, a sleeve ring is provided on the outer side of the roller bearing.

[0039] Furthermore, a material guide plate is arranged below the feed hopper, and the material guide plate is arranged obliquely above the multi-layer roller body.

[0040] In the utility model, the active roller and the driven roller are fixed in the roller bracket through the load-bearing connecting frame, so that when the roller mill is working, the axes of the active roller and the driven roller do not deviate relative to each other, further improving the crushing accuracy and the crushing consistency of the mill. The guide plate arranged obliquely below the feed hopper can convey the material to the oblique upper side of the roller, so that the material can be better crushed by the roller, thereby improving the crushing efficiency.

[0041] It should be noted that the above detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments described in the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0044] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0045] For ease of description, spatially relative terms, such as "above", "above", "on the upper surface of", "above", etc., may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0046] In the above detailed description, reference is made to the accompanying drawings, which form a part of this document. In the accompanying drawings, similar symbols typically identify similar components unless the context indicates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein.

[0047] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vertical roller mill for producing graphite negative electrode, characterized in that: The invention comprises a vertical machine body (1), a feed hopper (2), a main support frame (3), a roller body, a material collection box (4), and an air supply mechanism, wherein the feed hopper (2) is arranged above the vertical machine body (1), the roller body is horizontally arranged in the main support frame (3), and a material collection box (4) is arranged below the roller body. The roller body comprises a multi-layer roller body arranged in a vertical direction, and the multi-layer roller body is fixed to the main support frame (3) through a roller bracket (9), and the air supply mechanism is respectively arranged on the top of the vertical machine body and in the material collection box (4).

2. A vertical roller mill for producing graphite negative electrode according to claim 1, characterized in that: The air supply mechanism located at the top of the vertical machine body (1) is a centrifugal fan, and the air supply mechanism located in the material collecting box (4) is a negative pressure fan.

3. A vertical roller mill for producing graphite negative electrode according to claim 2, characterized in that: The centrifugal fan is divided into a left centrifugal fan (13) and a right centrifugal fan (14), and the two centrifugal fans are respectively located on both sides of the top of the vertical machine body (1).

4. The vertical roller mill for producing graphite negative electrode according to claim 1, characterized in that: The multi-layer roller body has four layers, which are respectively a first roller body (5), a second roller body (6), a third roller body (7) and a fourth roller body (8) from top to bottom.

5. The vertical roller mill for producing graphite negative electrode according to claim 1, characterized in that: A roller motor (10) is provided on the outside of the roller bracket (9); the roller motor (10) is located on the outside of the vertical machine body (1) and is connected to the roller bracket (9) via a transmission shaft (11).

6. A vertical roller mill for producing graphite negative electrode according to claim 5, characterized in that: Each layer of roller body comprises a driving roller (17) and a driven roller (18).

7. A vertical roller mill for producing graphite negative electrode according to claim 6, characterized in that: There are two roller brackets (9), namely a driving roller bracket (15) and a driven roller bracket (16), which are semicircular in shape. The semicircular roller brackets respectively wrap the driving roller (17) and the driven roller (18). One side of the two roller brackets (9) is fixedly connected together by a load-bearing connecting frame (19) and fixed to the main support frame.

8. A vertical roller mill for producing graphite negative electrode according to claim 7, characterized in that: One side of the two roller supports (9) is welded and connected via a load-bearing connecting frame (19).

9. A vertical roller mill for producing graphite negative electrode according to claim 7, characterized in that: The other sides of the two roller supports (9) are connected by a hydraulic connecting rod (20), one end of the hydraulic connecting rod (20) is welded and fixed to the driven roller support (16), and the other end is sleeved with the active roller support (15) by a transmission shaft.

10. The vertical roller mill for producing graphite negative electrode according to claim 6, characterized in that: A roller bearing (22) is provided at the center of the active roller (17), and the roller bearing (22) is connected to the roller motor (10) via the transmission shaft (11).

11. A vertical roller mill for producing graphite negative electrode according to claim 10, characterized in that: A sleeve ring (21) is also provided on the outer side of the roller bearing (22).

12. A vertical roller mill for producing graphite negative electrode according to claim 1, characterized in that: A material guide plate is arranged below the feed hopper (2), and the material guide plate is arranged obliquely above the multi-layer roller body.

Images