A roller mill pulverizer for graphite negative electrode production

Abstract

The utility model relates to a ring roller mill for graphite negative electrode production, including a main shaft, a main shaft fixing seat, a support seat, a grinding wheel bracket, and a cooling mechanism. The main shaft is fixedly mounted on the main shaft fixing seat, the main shaft fixing seat is mounted on the support seat at the bottom, the grinding wheel bracket is sleeved on the main shaft, a grinding wheel is mounted on the grinding wheel bracket, a grinding wheel is provided on the grinding wheel bracket, a grinding ring is provided on the side of the grinding wheel away from the main shaft, the grinding ring is fixedly provided on the support seat at the bottom, the cooling mechanism is provided on the side of the grinding ring, and the two are connected by a refrigerant connecting pipe. The utility model can effectively protect the main shaft and reduce the wear of the main shaft. The grinding wheel bracket is detachably connected to the main shaft for easy maintenance and replacement, and a cooling circulation system is provided inside the grinding ring and the support seat to reduce the accelerated wear caused by the heating of the components.

Description

Technical Field

[0001] The utility model relates to the technical field of ring roller mills, in particular to a ring roller mill pulverizer for graphite negative electrode production. Background Art

[0002] Ring roller mill, also known as roller mill or abacus mill, is commonly used for high-fine grinding of non-metallic minerals such as graphite, calcium carbonate, calcite, dolomite, limestone, silica, talc, kaolin, spar, etc. It mainly achieves the crushing of non-metallic minerals through the rolling, impact and grinding of multiple layers of ring rollers. When the mineral enters the crushing chamber through the feed pipe, it will scatter around the ring roller under the action of centrifugal force and fall into the raceway of the grinding ring. After that, the grinding roller presses and rolls the mineral, grinds it at the same time, and crushes it. After the first layer of crushing, the mineral will fall into the second layer, the third layer, and the fourth layer, until it is finally crushed to the required fineness after multiple layers of rolling and grinding. Next, the crushed minerals will be thrown out of the roller mill, and the induced draft fan will suck the crushed minerals into the powder concentrator through negative pressure. The coarse powder with larger diameter will return to the roller mill for re-grinding after passing through the classifier, while the fine powder with smaller diameter will enter the cyclone collector or bag dust collector with the airflow generated by the negative pressure for gas-solid separation. After that, the minerals are discharged from the discharge valve as the finished product, and the air is purified by the dust collector and discharged through the fan and muffler.

[0003] The advantages of the ring roller mill are its rolling crushing method and multi-layer rolling design, which are very suitable for the crushing of non-metallic minerals with a Mohs hardness of less than 6 and a humidity of less than 7%. It can produce products with a fineness of 150 mesh to 3000 mesh at one time, covering coarse powder to ultrafine powder. Under the same fineness requirements, compared with stirred mills, impact mills, air flow mills, ball mills, etc., the production efficiency of the ring roller mill is higher, the energy consumption is lower, and the production cost is also lower. At the same time, due to the simple installation, no need to set up a multi-layer steel structure platform or concrete platform, and the fast production speed, the ring roller mill is widely used in the grinding of non-metallic materials. The existing ring roller mill is mainly composed of a feeder, a main machine, a classifier, a pulse collector, a high-pressure fan, an electronic control device, etc. The cylinder is fixed on the support seat, and the cylinder is equipped with a feed pipe, a discharge pipe and a motor.

[0004] In the preparation process of graphite negative electrode materials, a ring roller mill is needed to grind graphite. In the existing ring roller mill, the main shaft is thin and the grinding roller is completely driven by the main shaft, so the main shaft is easy to wear and damage. The grinding roller bracket is usually fixed on the main shaft in two ways. One is to use welding. Although this fixing method can firmly fix the grinding roller bracket on the main shaft, it cannot be disassembled. It is very inconvenient if maintenance is required. When the grinding roller bracket or the main shaft is damaged, it can only be replaced as a whole, which invisibly increases the use cost of the equipment; the second is to fix the grinding roller bracket on the main shaft by clamping, but the conventional clamping method is not firm and often causes the main shaft to wear. In addition, during the high-speed grinding process of the ring roller mill, the friction between the grinding wheel and the material will generate a lot of heat. If the heat cannot be dissipated in time, the temperature of the components will rise. While accelerating the wear of the components, it is also easier to damage the ring roller mill, reducing the service life of the ring roller mill and increasing the use cost.

[0005] Chinese patent CN216025277U discloses a roller mill, which includes a frame, a cylinder is installed on the frame, a main shaft located in the cylinder is rotatably installed on the frame, a wear-resistant ring is fixedly installed on the inner wall of the cylinder, and a grinding roller bracket is fixedly installed on the main shaft. Since the main shaft and the grinding roller bracket are fixedly connected, the two cannot be disassembled, which is very inconvenient if maintenance is required. When the grinding roller bracket or the main shaft is damaged, it can only be replaced as a whole. Another Chinese patent CN220514334U discloses a high-efficiency grinding structure of a ring roller mill. In order to cool and dissipate the grinding ring and improve the service life of the grinding ring, a cooling liquid storage shell is fixedly installed on the outer wall of the ring roller mill shell, and a coolant is arranged inside the cooling liquid storage shell. The cooling liquid is used to cool and dissipate the grinding ring, but the coolant in this scheme is static, and the coolant is only dissipated through the ventilation holes on the cooling liquid storage shell. The heat dissipation effect is not good, and there is still a lot of room for improvement.

[0006] Therefore, how to achieve a detachable connection between the main shaft and the grinding roller bracket while making them firmly connected, reduce the friction between the two due to mutual movement, and how to achieve efficient heat dissipation of the ring roller mill have become technical problems to be solved. Utility Model Content

[0007] The utility model aims to provide a ring roller mill pulverizer 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.

[0008] A ring roller mill for producing graphite negative electrodes comprises a main shaft, a main shaft fixing seat, a support seat, a grinding wheel bracket and a cooling mechanism, wherein the main shaft is fixedly mounted on the main shaft fixing seat, the main shaft fixing seat is mounted on the support seat at the bottom, the grinding wheel bracket is sleeved on the main shaft, a grinding wheel is mounted on the grinding wheel bracket, a grinding ring is provided on the side of the grinding wheel away from the main shaft, the grinding ring is fixedly mounted on the support seat at the bottom, the cooling mechanism is arranged on the side of the grinding ring, and the two are connected by a refrigerant connecting pipe.

[0009] Preferably, the cooling mechanism comprises a cooling fan housing and a refrigerant circulation area, a refrigerant cooling fan is provided inside the cooling fan housing, and the refrigerant cooling fan is connected to a motor provided outside the cooling fan housing through a transmission rod.

[0010] Preferably, the refrigerant liquid connecting pipe includes a liquid inlet channel and a liquid outlet channel.

[0011] Preferably, the cooling mechanism further comprises a water pump, and the water pump is connected to the refrigerant liquid connecting pipe.

[0012] Preferably, a serpentine-shaped refrigerant circulation pipe is provided in the support seat, and a refrigerant circulation pipe is provided inside the grinding ring and around the grinding ring. The refrigerant circulation pipe in the support seat is connected to the refrigerant circulation pipe in the grinding ring, and one end of the refrigerant circulation pipe is connected to the liquid inlet channel, and the other end is connected to the liquid outlet channel.

[0013] Preferably, the main shaft is surrounded by an anti-damage disk with a diameter greater than that of the main shaft, and the center of the anti-damage disk coincides with the center of the main shaft.

[0014] Preferably, a circle of raised clips are evenly distributed on the outside of the anti-damage disk. The clips are semi-cylindrical and penetrate longitudinally in the vertical direction. The outside of the clips is covered with a sealing flange. The grinding wheel bracket has a hollow cavity. A slot corresponding to the clip is provided in the hollow cavity, and the clip is connected with the slot by snapping.

[0015] Preferably, a circle of blanking holes is distributed near the outer edge of the anti-damage disk, and the top of the grinding wheel bracket has holes corresponding to the blanking holes on the anti-damage disk. When the hollow cavity of the grinding wheel bracket is engaged with the clamping part outside the anti-damage disk, the blanking holes correspond one-to-one with the holes.

[0016] In the utility model, firstly, an anti-damage disk concentric with the main shaft is arranged outside the main shaft, and the anti-damage disk can increase the diameter of the main shaft, enhance the strength of the main shaft, and avoid the occurrence of the situation that the main shaft is broken due to the poor strength caused by the spindle being too thin and the wear of the main shaft during use. Secondly, the grinding wheel bracket is connected to the anti-damage disk outside the grinding roller main shaft through a clamp. On the one hand, the above-mentioned detachable connection method is adopted between the two. When some of the components are damaged, only some of the components need to be replaced without replacing the entire component. On the other hand, it can also protect the main shaft and reduce the wear on the main shaft, and a plurality of clamps arranged longitudinally in the vertical direction can make the grinding wheel bracket firmly fixed on the anti-damage disk, reduce the mutual displacement between the two, and thus reduce the wear on the main shaft. In addition, a sealing flange is arranged outside the clamp, which can further reduce the friction between the grinding wheel bracket and the anti-damage disk caused by the mutual displacement. Finally, the utility model provides a refrigerant circulation pipe inside the support seat and the grinding ring of the ring roller mill, which can quickly dissipate the heat generated by the ring roller mill during operation and effectively improve the heat dissipation effect. Moreover, in order to further improve the heat dissipation effect, a water pump is provided to accelerate the circulation speed of the refrigerant, and a refrigerant cooling fan is provided to accelerate the dissipation of heat in the refrigerant. Compared with the method of only providing static coolant inside the support seat and the grinding ring, the heat dissipation effect is further improved, the accelerated wear of components caused by temperature rise is reduced, and the components of the ring roller mill can be well protected.

[0017] The utility model provides a ring roller mill pulverizer for graphite negative electrode production. Through the above improvements, the wear of the main shaft can be reduced to the greatest extent during the preparation process of graphite negative electrode materials, the strength of the main shaft can be improved, the heat dissipation effect of the ring roller mill can be improved, the wear of equipment components can be reduced, the probability of equipment damage can be reduced, and costs can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the ring roller mill pulverizer of the utility model;

[0019] Figure 2 It is a cross-sectional schematic diagram of the main shaft of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the cooling mechanism of the utility model;

[0021] The figure numerals in the accompanying drawings are: 1. spindle, 2. spindle fixing seat, 3. support seat, 4. grinding wheel bracket, 5. grinding wheel, 6. grinding ring, 7. refrigerant circulation pipe, 8. refrigerant connecting pipe, 9. refrigerant cooling fan, 10. anti-damage disk, 11. clamp, 12. sealing flange, 13. blanking hole, 14. cooling fan housing; 15. motor, 16. transmission rod, 17. refrigerant circulation area, 18. water pump, 19. refrigerant connecting pipe, 20. liquid inlet channel, 21. liquid outlet channel. DETAILED DESCRIPTION

[0022] 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.

[0023] Embodiment 1:

[0024] A ring roller mill for producing graphite negative electrodes comprises a main shaft 1, a main shaft fixing seat 2, a support seat 3, a grinding wheel bracket 4, and a cooling mechanism. The main shaft 1 is fixedly mounted on the main shaft fixing seat 2, the main shaft fixing seat 2 is mounted on the support seat 3 at the bottom, the grinding wheel bracket 4 is sleeved on the main shaft 1, a grinding wheel 5 is mounted on the grinding wheel bracket 4, a grinding ring 6 is provided on the side of the grinding wheel 5 away from the main shaft 1, the grinding ring 6 is fixedly mounted on the support seat 3 at the bottom, the cooling mechanism is arranged on the side of the grinding ring 6, and the two are connected by a refrigerant connecting pipe 8.

[0025] Furthermore, the cooling mechanism includes a cooling fan housing 14 and a refrigerant circulation area 17 . A refrigerant cooling fan 9 is provided inside the cooling fan housing 14 . The refrigerant cooling fan 9 is connected to a motor 15 provided outside the cooling fan housing 14 via a transmission rod 16 .

[0026] Furthermore, the refrigerant liquid connecting pipe 8 includes a liquid inlet channel 20 and a liquid outlet channel 21 .

[0027] Furthermore, the cooling mechanism also includes a water pump 18 , and the water pump 18 is connected to the refrigerant liquid connecting pipe 8 .

[0028] Furthermore, a serpentine-shaped refrigerant circulation pipe 7 is provided in the support seat 3, and a refrigerant circulation pipe 7 is provided inside the grinding ring 6 and around the grinding ring 6. The refrigerant circulation pipe 7 in the support seat 3 is connected to the refrigerant circulation pipe 7 in the grinding ring 6, and one end of the refrigerant circulation pipe 7 is connected to the liquid inlet channel 20, and the other end is connected to the liquid outlet channel 21.

[0029] In the utility model, a refrigerant circulation pipe is arranged inside the support seat and the grinding ring of the ring roller mill, which can quickly dissipate the heat generated by the ring roller mill during operation, effectively improving the heat dissipation effect of the ring roller mill, and in order to further improve the heat dissipation effect, a water pump is arranged to accelerate the circulation speed of the refrigerant, and a refrigerant cooling fan is arranged to accelerate the dissipation of heat in the refrigerant, and the heat absorbed by the refrigerant in the support seat and the grinding ring is dissipated in time. Compared with the method of only arranging static coolant inside the support seat and the grinding ring, the heat dissipation effect is further improved, the accelerated wear of components caused by temperature rise is reduced, and the components of the ring roller mill can be well protected.

[0030] Embodiment 2:

[0031] On the basis of Example 1, the main shaft 1 is surrounded by an anti-damage disk 10 with a diameter larger than that of the main shaft, and the center of the anti-damage disk 10 coincides with the center of the main shaft 1 .

[0032] Furthermore, a circle of raised clips 11 are evenly distributed on the outside of the anti-damage disk 10. The clips 11 are semi-cylindrical and penetrate longitudinally in the vertical direction. The clips 11 are covered with a sealing flange 12. The grinding wheel bracket 4 has a hollow cavity, and a slot corresponding to the clip 11 is provided in the hollow cavity. The clip 11 is engaged and connected with the slot.

[0033] Furthermore, a circle of blanking holes 13 are distributed near the outer edge of the anti-damage disk 10, and the top of the grinding wheel bracket 4 has holes corresponding to the blanking holes 13 on the anti-damage disk. When the hollow cavity of the grinding wheel bracket 4 is engaged with the clamping part 11 outside the anti-damage disk 10, the blanking holes 13 correspond one by one to the holes.

[0034] In the utility model, an anti-damage disk is arranged outside the main shaft and is concentric with the main shaft. The anti-damage disk can increase the diameter of the main shaft, enhance the strength of the main shaft, and avoid the occurrence of the situation that the main shaft is broken due to poor strength caused by the spindle being too thin and the wear of the main shaft during use. The grinding wheel bracket is sleeved on the upper anti-damage disk outside the grinding roller main shaft through a clamp. On the one hand, the above-mentioned detachable connection method is adopted between the two. When some of the components are damaged, only some of the components need to be replaced without replacing the entire component. On the other hand, it can also protect the main shaft and reduce the wear on the main shaft. A plurality of clamps arranged longitudinally in the vertical direction can make the grinding wheel bracket firmly fixed on the anti-damage disk, reduce the mutual displacement between the two, and thus reduce the wear on the main shaft. In addition, a sealing flange is arranged outside the clamp, which can further reduce the friction between the grinding wheel bracket and the anti-damage disk caused by the mutual displacement.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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 roller mill for graphite negative electrode production, characterized in that: The invention comprises a main shaft (1), a main shaft fixing seat (2), a support seat (3), a grinding wheel bracket (4), and a cooling mechanism, wherein the main shaft (1) is fixedly mounted on the main shaft fixing seat (2), the main shaft fixing seat (2) is mounted on the support seat (3) at the bottom, the grinding wheel bracket (4) is sleeved on the main shaft (1), a grinding wheel (5) is mounted on the grinding wheel bracket (4), a grinding ring (6) is provided on the side of the grinding wheel (5) away from the main shaft (1), the grinding ring (6) is fixedly mounted on the support seat (3) at the bottom, the cooling mechanism is arranged on the side of the grinding ring (6), and the two are connected via a refrigerant connecting pipe (8).

2. The roller mill for producing graphite negative electrode according to claim 1, characterized in that: The cooling mechanism comprises a cooling fan housing (14) and a refrigerant circulation area (17); a refrigerant cooling fan (9) is arranged inside the cooling fan housing (14); and the refrigerant cooling fan (9) is connected to a motor (15) arranged outside the cooling fan housing (14) via a transmission rod (16).

3. The roller mill for producing graphite negative electrode according to claim 2, characterized in that: The refrigerant liquid connecting pipe (8) comprises a liquid inlet channel (20) and a liquid outlet channel (21).

4. The roller mill for producing graphite negative electrode according to claim 2, characterized in that: The cooling mechanism further comprises a water pump (18), and the water pump (18) is connected to the refrigerant liquid connecting pipe (8).

5. The roller mill for producing graphite negative electrode according to claim 3, characterized in that: A serpentine-shaped refrigerant circulation pipe (7) is provided in the support seat (3), and a refrigerant circulation pipe (7) is provided inside the grinding ring (6) and surrounds the grinding ring (6). The refrigerant circulation pipe (7) in the support seat (3) is connected to the refrigerant circulation pipe (7) in the grinding ring (6), and one end of the refrigerant circulation pipe (7) is connected to the liquid inlet channel (20), and the other end is connected to the liquid outlet channel (21).

6. The roller mill for producing graphite negative electrode according to claim 1, characterized in that: The main shaft (1) is surrounded by an anti-damage disk (10) having a diameter greater than that of the main shaft, and the center of the anti-damage disk (10) coincides with the center of the main shaft (1).

7. The roller mill for producing graphite negative electrode according to claim 6, characterized in that: A circle of raised clamping parts (11) are evenly distributed on the outer side of the anti-damage disk (10). The clamping parts (11) are semi-cylindrical and penetrate longitudinally in the vertical direction. The clamping parts (11) are covered with a sealing flange (12). The grinding wheel bracket (4) has a hollow cavity. A clamping groove corresponding to the clamping part (11) is provided in the hollow cavity. The clamping part (11) is connected to the clamping groove by clamping.

8. The roller mill for producing graphite negative electrode according to claim 7, characterized in that: A circle of blanking holes (13) are distributed near the outer edge of the anti-damage disk (10), and the top of the grinding wheel bracket (4) has holes corresponding to the blanking holes (13) on the anti-damage disk (10). When the hollow cavity of the grinding wheel bracket (4) is engaged with the clamping member (11) outside the anti-damage disk (10), the blanking holes (13) correspond one-to-one with the holes.

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