Pressure stabilizing device for pneumatic conveying of positive electrode material powder of lithium battery

Abstract

The utility model relates to the technical field of lithium battery production equipment, in particular to a pressure stabilizer for pneumatic conveying of lithium battery anode material powder, which comprises an air compressor, an air outlet pipe fixedly mounted at the air outlet end of the air compressor, and a filter cartridge fixedly mounted at the tail end of the air outlet pipe. A molecular sieve and a filter screen are sequentially arranged in the filter cylinder from bottom to top, a conical cylinder is fixedly installed at the bottom end of the filter cylinder, a top cover is fixedly installed at the top of the filter cylinder, an air inlet pipe is fixedly installed on a cylinder body at the top of the filter cylinder, an air storage tank is fixedly installed at the tail end of the air inlet pipe, and a conveying pipe is fixedly installed on a tank body at the bottom of the air storage tank. A buffer tank is fixedly mounted at the tail end of the conveying pipe, a first pressure stabilizing valve is fixedly mounted on the conveying pipe, an external pipe is fixedly mounted on the buffer tank, and a second pressure stabilizing valve is fixedly mounted on the external pipe. The lithium battery conveying device has the effects of stable-pressure conveying and air flow filtering treatment, and subsequent preparation of lithium batteries is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production equipment technology, and more specifically, to a voltage stabilizing device for the airflow conveying of lithium battery cathode material powder. Background Technology

[0002] In the production process of lithium batteries, the conveying of cathode material powder is a key step. Currently, pneumatic conveying, as an efficient powder conveying method, is widely used in the conveying process of lithium battery cathode material powder.

[0003] However, existing pneumatic conveying systems have many problems. On the one hand, the airflow pressure fluctuates greatly, making it difficult to maintain a stable conveying pressure. When the conveying pipeline is long or the conveying path is complex, the airflow in the pipeline will be affected by various factors such as friction and resistance, resulting in unstable pressure. This pressure fluctuation will cause the cathode material powder to deposit and block the pipeline during the conveying process, which will seriously affect the conveying efficiency and increase maintenance costs. On the other hand, when the conveying equipment starts or stops or the conveying volume changes, the airflow pressure will produce large instantaneous fluctuations. This will not only lead to uneven powder conveying and affect the stability of subsequent production processes, but may also cause equipment damage and reduce the service life of the equipment due to excessively high or low pressure.

[0004] To avoid the aforementioned problems, when conveying cathode material powder through pneumatics, a corresponding slow-flow tank is usually installed in the pipeline. The slow flow of gas in the slow-flow tank, combined with a pressure-stabilizing valve installed on the pipeline, achieves the effect of stable pressure conveying.

[0005] However, in practical use, this type of voltage regulator lacks components capable of removing impurities and moisture from the gas. Since the gas being transported is mostly air, which contains impurities and moisture, directly transporting air would cause these impurities and moisture to enter the lithium battery, affecting its lifespan and stability. Therefore, we propose a voltage regulator for the pneumatic transport of lithium battery cathode material powder. Utility Model Content

[0006] The purpose of this invention is to provide a voltage stabilizing device for the airflow conveying of lithium battery cathode material powder, so as to solve the defects mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A pressure stabilizing device for pneumatic conveying of lithium battery cathode material powder includes an air compressor. An air outlet pipe is fixedly installed at the air outlet end of the air compressor. A filter cartridge is fixedly installed at the end of the air outlet pipe. A molecular sieve and a filter screen are arranged sequentially from bottom to top inside the filter cartridge. A conical cylinder is fixedly installed at the bottom end of the filter cartridge. The end of the air outlet pipe is inserted into the conical cylinder. A top cover is fixedly installed at the top of the filter cartridge. An air inlet pipe is fixedly installed on the top of the filter cartridge, located above the filter screen. An air storage tank is fixedly installed at the end of the air inlet pipe. A conveying pipe is fixedly installed on the bottom of the air storage tank. A buffer tank is fixedly installed at the end of the conveying pipe. A first pressure stabilizing valve is fixedly installed on the conveying pipe. An external pipe is fixedly installed on the buffer tank. A second pressure stabilizing valve is fixedly installed on the external pipe.

[0009] Preferably, a plurality of support blocks are fixedly installed at the bottom of the air compressor, and the height of the support blocks is between 5cm and 8cm.

[0010] Preferably, the conical cylinder is funnel-shaped, and the plane containing the inner wall of the conical cylinder is inclined downward at 45° to 60°.

[0011] Preferably, a discharge pipe is fixedly installed at the bottom end of the conical cylinder, and a discharge valve is fixedly installed on the discharge pipe.

[0012] Preferably, an inner support ring is fixedly installed on the inner wall of the top cylinder of the filter cartridge, and a fixing ring is fixedly installed on the filter screen. The fixing ring is detachably installed on the upper surface of the inner support ring.

[0013] Preferably, the molecular sieve is located below the inner support ring, and the fixing ring and the inner support ring are fixedly connected by a plurality of fastening screws.

[0014] Preferably, a sealing ring is fixedly installed on the top cylinder of the filter cartridge, and the top cover is fixedly installed on the upper surface of the sealing ring by a plurality of fastening bolts.

[0015] Preferably, an annular groove is provided on the upper surface of the sealing ring, and a sealing ring is engaged in the annular groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model, by setting up an air compressor, a filter cartridge, an air storage tank and a buffer tank, generates airflow, which is filtered through multiple layers by the filter cartridge and then enters the air storage tank and the buffer tank for step-by-step buffering and pressure stabilization. With the regulation of the first pressure stabilizing valve and the second pressure stabilizing valve, the effective pressure stabilization of the conveying airflow is achieved, thereby reducing airflow pressure fluctuations and ensuring the stable conveying of lithium battery cathode material powder.

[0018] 2. This utility model, through the setting of a multi-layer filtration structure and easily disassembled components, allows the molecular sieve and filter screen inside the filter cylinder to perform dual filtration of the airflow. The filter screen is detachably connected to the inner support ring through a fixing ring, and the top cover is fixed to the filter cylinder through a sealing ring. This enables the removal of impurities and the absorption of moisture from the gas, and facilitates the convenient replacement and maintenance of the filter components, thereby ensuring the filtration effect and extending the service life of the equipment.

[0019] 3. This utility model, by setting up a conical cylinder with a specific structure, a discharge pipe, and a support pad, has the advantages of a conical cylinder with an inclined design to facilitate the discharge of impurities, a discharge pipe and a discharge valve to facilitate the discharge operation inside the filter cylinder, and a support pad to provide stable support for the air compressor. This achieves the convenience of equipment operation and maintenance, reduces maintenance costs, and improves overall practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is one of the partial structural schematic diagrams of this utility model;

[0022] Figure 3 This is the second partial structural schematic diagram of the present utility model;

[0023] Figure 4 This is a cross-sectional view of the filter cartridge of this utility model;

[0024] The meanings of the labels in the diagram are as follows:

[0025] 1. Air compressor; 10. Support pad; 11. Air outlet pipe;

[0026] 2. Filter cartridge; 20. Conical cylinder; 21. Discharge pipe; 211. Discharge valve; 22. Inner support ring; 23. Molecular sieve; 24. Sealing ring; 241. Annular groove; 25. Sealing ring; 26. Fixing ring; 261. Filter screen; 27. Top cover;

[0027] 3. Gas storage tank; 30. Air inlet pipe;

[0028] 4. Buffer tank; 40. Delivery pipe; 41. First pressure regulating valve; 42. External pipe; 43. Second pressure regulating valve. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-4 This utility model provides a technical solution: a pressure stabilizing device for pneumatic conveying of lithium battery cathode material powder, including an air compressor 1. An air outlet pipe 11 is fixedly installed at the air outlet end of the air compressor 1, and a filter cylinder 2 is fixedly installed at the end of the air outlet pipe 11, so that the gas to be conveyed is initially guided and provides a gas source guarantee for the subsequent filtration stage. A molecular sieve 23 and a filter screen 261 are arranged sequentially from bottom to top inside the filter cylinder 2. The gas passes through the molecular sieve 23 and the filter screen 261 in the filter cylinder 2, so that impurities, moisture and other substances are effectively removed, ensuring the purity of the conveyed gas and avoiding contamination of the lithium battery cathode material powder.

[0031] Specifically, a conical cylinder 20 is fixedly installed at the bottom of the filter cylinder 2, and the end of the air outlet pipe 11 is inserted into the conical cylinder 20. The conical cylinder 20 is funnel-shaped, and the plane of the inner wall of the conical cylinder 20 is inclined downward at 45°~60°, so that the airflow entering the filter cylinder 2 can be diffused more evenly, ensuring that the airflow passes through the molecular sieve 23 and the filter screen 261 from bottom to top before being discharged outward.

[0032] Specifically, a top cover 27 is fixedly installed on the top of the filter cartridge 2, and an air inlet pipe 30 is fixedly installed on the top of the filter cartridge 2. The air inlet pipe 30 is located above the filter screen 261, and an air storage tank 3 is fixedly installed at the end of the air inlet pipe 30. The filtered gas enters the air storage tank 3 through the air inlet pipe 30, so that the filtered gas is stored and the airflow fluctuations are buffered. A delivery pipe 40 is fixedly installed on the bottom of the air storage tank 3, and a buffer tank 4 is fixedly installed at the end of the delivery pipe 40. The gas in the air storage tank 3 enters the buffer tank 3 through the delivery pipe 40. The buffer tank 4 further buffers the gas and reduces pressure fluctuations. A first pressure regulating valve 41 is fixedly installed on the delivery pipe 40. The first pressure regulating valve 41 regulates the gas pressure in the delivery pipe 40 to maintain the gas pressure entering the buffer tank 4 within a suitable range, ensuring the stable operation of the buffer tank 4. An external pipe 42 is fixedly installed on the buffer tank 4, and a second pressure regulating valve 43 is fixedly installed on the external pipe 42. The second pressure regulating valve 43 further regulates the pressure to stabilize the output gas pressure and meet the delivery requirements of lithium battery cathode material powder.

[0033] In this embodiment, multiple support blocks 10 are fixedly installed at the bottom of the air compressor 1. The height of the support blocks 10 is between 5cm and 8cm, which makes the air compressor 1 more stable, reduces vibration during operation, and extends the service life of the equipment.

[0034] Specifically, a discharge pipe 21 is fixedly installed at the bottom of the conical cylinder 20, and a discharge valve 211 is fixedly installed on the discharge pipe 21, so that the subsequent molecular sieve 23 can be discharged outward along the discharge pipe 21, thereby realizing the replacement operation of the failed molecular sieve 23.

[0035] Furthermore, an inner support ring 22 is fixedly installed on the inner wall of the top cylinder of the filter cartridge 2, and a fixing ring 26 is fixedly installed on the filter screen 261. The fixing ring 26 is detachably installed on the upper surface of the inner support ring 22. The molecular sieve 23 is located below the inner support ring 22. The fixing ring 26 and the inner support ring 22 are fixedly connected by multiple fastening screws, making it convenient to replace and maintain the filter screen 261.

[0036] In addition, a sealing ring 24 is fixedly installed on the top cylinder of the filter cartridge 2, and the top cover 27 is fixedly installed on the upper surface of the sealing ring 24 by multiple fastening bolts, which facilitates the fixing, installation and disassembly of the top cover 27.

[0037] It is worth noting that an annular groove 241 is provided on the upper surface of the sealing ring 24, and a sealing ring 25 is engaged in the annular groove 241, which enhances the sealing of the top of the filter cartridge 2 and prevents gas leakage.

[0038] When using the pressure stabilizing device for the airflow conveying of lithium battery cathode material powder, the air compressor 1 is first turned on, and the gas generated enters the conical cylinder 20 at the bottom of the filter cylinder 2 through the air outlet pipe 11 and flows from bottom to top. Then it passes through the molecular sieve 23 and the filter screen 261 in sequence to filter impurities and moisture.

[0039] Next, the filtered gas enters the gas storage tank 3 through the inlet pipe 30 for initial buffering. Then, the gas enters the buffer tank 4 through the delivery pipe 40 equipped with the first pressure regulating valve 41 for further buffering and pressure regulation. During this period, the first pressure regulating valve 41 regulates the gas pressure entering the buffer tank 4. Finally, the gas passes through the external pipe 42 and is pressure-regulated again by the second pressure regulating valve 43 before being used to transport lithium battery cathode material powder.

[0040] When equipment maintenance is required, open the discharge valve 211 on the discharge pipe 21 to discharge the failed molecular sieve 23, unscrew the fastening bolts between the top cover 27 and the sealing ring 24 to inspect and maintain the inside of the filter cylinder 2, and unscrew the fastening screws between the fixing ring 26 and the inner support ring 22 to replace the filter screen 261 and add a new molecular sieve 23.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A voltage stabilizing device for pneumatic conveying of lithium battery cathode material powder, comprising an air compressor (1), characterized in that: An air outlet pipe (11) is fixedly installed at the air outlet end of the air compressor (1). A filter cylinder (2) is fixedly installed at the end of the air outlet pipe (11). A molecular sieve (23) and a filter screen (261) are arranged sequentially from bottom to top inside the filter cylinder (2). A conical cylinder (20) is fixedly installed at the bottom end of the filter cylinder (2). The end of the air outlet pipe (11) is inserted into the conical cylinder (20). A top cover (27) is fixedly installed at the top of the filter cylinder (2). An inlet valve is fixedly installed on the top cylinder of the filter cylinder (2). Air pipe (30), the air inlet pipe (30) is located above the filter screen (261), the end of the air inlet pipe (30) is fixedly installed with an air storage tank (3), the bottom of the air storage tank (3) is fixedly installed with a delivery pipe (40), the end of the delivery pipe (40) is fixedly installed with a buffer tank (4), the delivery pipe (40) is fixedly installed with a first pressure regulating valve (41), the buffer tank (4) is fixedly installed with an external pipe (42), and the external pipe (42) is fixedly installed with a second pressure regulating valve (43).

2. The voltage stabilizing device for pneumatic conveying of lithium battery cathode material powder according to claim 1, characterized in that: The bottom of the air compressor (1) is fixedly equipped with multiple support pads (10), and the height of the support pads (10) is between 5cm and 8cm.

3. The voltage stabilizing device for pneumatic conveying of lithium battery cathode material powder according to claim 1, characterized in that: The conical cylinder (20) is funnel-shaped, and the plane of the inner wall of the conical cylinder (20) is inclined downward at 45°~60°.

4. The voltage stabilizing device for pneumatic conveying of lithium battery cathode material powder according to claim 3, characterized in that: The bottom end of the conical cylinder (20) is fixedly installed with a discharge pipe (21), and a discharge valve (211) is fixedly installed on the discharge pipe (21).

5. The voltage stabilizing device for pneumatic conveying of lithium battery cathode material powder according to claim 1, characterized in that: An inner support ring (22) is fixedly installed on the inner wall of the top cylinder of the filter cylinder (2), and a fixing ring (26) is fixedly installed on the filter screen (261). The fixing ring (26) is detachably installed on the upper surface of the inner support ring (22).

6. The voltage stabilizing device for pneumatic conveying of lithium battery cathode material powder according to claim 5, characterized in that: The molecular sieve (23) is located below the inner support ring (22), and the fixing ring (26) is fixedly connected to the inner support ring (22) by a plurality of fastening screws.

7. The voltage stabilizing device for pneumatic conveying of lithium battery cathode material powder according to claim 1, characterized in that: A sealing ring (24) is fixedly installed on the top cylinder of the filter cylinder (2), and the top cover (27) is fixedly installed on the upper surface of the sealing ring (24) by multiple fastening bolts.

8. The voltage stabilizing device for pneumatic conveying of lithium battery cathode material powder according to claim 7, characterized in that: An annular groove (241) is provided on the upper surface of the sealing ring (24), and a sealing ring (25) is engaged in the annular groove (241).

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