Scraping device for centrifugal machine

Abstract

The centrifugal machine comprises a machine body and a rotary drum rotationally arranged in the machine body, filter cloth is arranged on the side wall of the rotary drum, the scraping device comprises a telescopic part, a rotary rod, a scraper, an adjusting mechanism, a distance sensor and a controller, the telescopic part is fixedly arranged at the top of the machine body, and the movable end of the telescopic part is rotationally connected with the upper end of the rotary rod; the lower end of the rotating rod penetrates into the rotary drum and is fixedly connected with the scraper, the telescopic piece is used for driving the scraper to ascend and descend, the adjusting mechanism is arranged on one side of the top of the machine body, connected with the rotating rod and used for driving the rotating rod to rotate so as to adjust the distance between the scraper and the filter cloth, and the distance sensor is fixedly arranged on one side of the scraper. And the distance sensor, the telescopic piece and the adjusting mechanism are electrically connected with the controller. The problems that the distance between the scraper and the filter cloth is fixed, and when the filter cloth is swelled to cause non-uniform distribution of filter cakes, the scraper can scratch the filter cloth in the scraping process to cause material leakage and material waste are solved.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge technology, specifically to a scraping device for centrifuges. Background Technology

[0002] Ternary precursors are nickel-cobalt-manganese (aluminum) ternary composite hydroxides. Based on the molar ratio of nickel, cobalt, and manganese (aluminum), they can be further subdivided into NCM811 precursors, NCM622 precursors, NCM523 precursors, and NCA precursors. Correspondingly, they react with lithium salts to prepare ternary cathode materials with different nickel contents.

[0003] Ternary precursors are one of the important raw materials for manufacturing electric vehicle batteries. They can improve the energy density and cycle life of batteries, thereby increasing the driving range and lifespan of electric vehicles; they can also improve the energy storage efficiency and lifespan of energy storage batteries; and they can also be used to manufacture batteries for portable electronic products.

[0004] Centrifuges play a crucial role in the dehydration process of ternary precursor materials. During the preparation of ternary precursor materials, wet slurries or precipitates are usually formed, which need to be dehydrated to convert them into dry powder for subsequent lithiation and calcination steps. In actual use, since the distance between the scraper and the filter cloth is fixed, when the filter cloth bulges and the filter cake is unevenly distributed, the scraper will scratch the filter cloth during the scraping process, resulting in material loss and waste. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a scraping device for centrifuges, which solves the problem that when the distance between the scraper and the filter cloth is fixed in the existing technology, the filter cloth bulges and the filter cake is unevenly distributed, the scraper will scratch the filter cloth during the scraping process, resulting in material loss and waste.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a scraping device for a centrifuge. The centrifuge includes a body and a rotating drum rotatably disposed within the body. Filter cloth is provided on the side wall of the rotating drum. The scraping device includes a telescopic component, a rotating rod, a scraper, an adjusting mechanism, a distance sensor, and a controller. The telescopic component is fixed to the top of the body, and its movable end is rotatably connected to the upper end of the rotating rod. The lower end of the rotating rod passes through the rotating drum and is fixedly connected to the scraper. The telescopic component is used to drive the scraper to rise and fall. The adjusting mechanism is located on one side of the top of the body and is connected to the rotating rod. The adjusting mechanism is used to drive the rotating rod to rotate to adjust the distance between the scraper and the filter cloth. The distance sensor is fixed to one side of the scraper and is used to detect the distance between the scraper and the filter cake on the filter cloth. The distance sensor, the telescopic component, and the adjusting mechanism are electrically connected to the controller.

[0008] In some embodiments, the adjustment mechanism includes a drive member, a guide rod, and a transmission rod. The drive member is fixedly disposed on one side of the top of the machine body and is located above the rotating drum. The movable end of the drive member is fixedly connected to one end of the guide rod, and the other end of the guide rod passes through the rotating drum. The axis of the guide rod is parallel to the axis of the rotating drum. One end of the transmission rod is fixedly connected to the rotating rod, and the other end of the transmission rod is slidably connected to the guide rod.

[0009] In some embodiments, the transmission rod has a strip-shaped hole along its length, and the guide rod slides through the strip-shaped hole.

[0010] In some embodiments, the axis of the guide rod is parallel to the axis of the rotating rod, and the axis of the transmission rod is perpendicular to the axes of the guide rod and the rotating rod.

[0011] In some embodiments, the filter cloth is a polyester filter cloth, a nylon filter cloth, or a polypropylene filter cloth.

[0012] In some embodiments, the rotating rod, guide rod, and transmission rod are all coated with an anti-corrosion coating.

[0013] In some embodiments, the distance between the scraper and the filter cloth is 1 cm.

[0014] In some embodiments, the scraper is made of PEek board.

[0015] In some embodiments, the centrifuge is a flat-plate centrifuge.

[0016] In some embodiments, the telescopic member and the driving member are both electric push rods, pneumatic cylinders, or hydraulic cylinders.

[0017] Compared with the prior art, the scraping device for centrifuge provided by this utility model is fixed to the top of the machine body by a telescopic component, and the movable end is rotatably connected to the upper end of the rotating rod. The lower end of the rotating rod passes through the drum and is fixedly connected to the scraper. The telescopic component is used to drive the scraper to rise and fall. The adjustment mechanism is located on one side of the top of the machine body and is connected to the rotating rod. The adjustment mechanism is used to drive the rotating rod to rotate to adjust the distance between the scraper and the filter cloth. The distance sensor is fixed to one side of the scraper, and the distance sensor, the telescopic component, and the adjustment mechanism are electrically connected to the controller. When the filter cloth bulges, causing the filter cake to be unevenly distributed, and the drum rotates around its own axis, the distance sensor can detect the distance between the filter cake and the drum in real time. The distance sensor transmits the distance information to the controller. After receiving the information, the controller controls the adjustment mechanism to drive the scraper to rotate, so that the distance between the scraper and the filter cloth can be kept constant, which can effectively reduce the risk of the scraper tearing the filter cloth. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of a scraping device for a centrifuge provided in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the scraping device provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the scraper before rotation provided in this embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the scraper after rotation according to an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] To address the technical problem in existing technologies where the distance between the scraper and the filter cloth is fixed, and the filter cloth bulges, leading to uneven filter cake distribution, the scraper may scratch the filter cloth during scraping, causing material loss and waste. This invention provides a scraping device for centrifuges that can adjust the distance between the scraper and the filter cloth in real time when bulges appear, ensuring a constant distance between them.

[0024] Please see Figures 1-4 , Figures 1-4This invention relates to a scraping device for a centrifuge, comprising a centrifuge 1 including a body 11 and a rotating drum 12 rotatably disposed within the body 11. The side wall of the rotating drum 12 is provided with a filter cloth 13. The scraping device 2 includes a telescopic component 21, a rotating rod 22, a scraper 23, an adjusting mechanism 24, a distance sensor 25, and a controller 26. The telescopic component 21 is fixed to the top of the body 11, and its movable end is rotatably connected to the upper end of the rotating rod 22. The lower end of the rotating rod 22 passes through the rotating drum 12 and is connected to the scraper. 23 is fixedly connected. The telescopic member 21 is used to drive the scraper 23 to rise and fall. The adjustment mechanism 24 is located on one side of the top of the machine body 11 and is connected to the rotating rod 22. The adjustment mechanism 24 is used to drive the rotating rod 22 to rotate to adjust the distance between the scraper 23 and the filter cloth 13. The distance sensor 25 is fixed on one side of the scraper 23 and is used to detect the distance between it and the filter cake on the filter cloth. The distance sensor 25, the telescopic member 21, and the adjustment mechanism 24 are electrically connected to the controller 26.

[0025] It should be noted that the centrifuge mentioned is a flat-plate centrifuge, a commonly used solid-liquid separation device widely used in industries such as chemical, pharmaceutical, food, and environmental protection. It separates solid particles from a liquid mixture using centrifugal force generated by high-speed rotation. The core components of a flat-plate centrifuge include a rotating drum and a drive unit to rotate the drum around its own axis. The drum contains a filter screen or filter cloth to intercept solid particles. The centrifugal force generated during high-speed rotation pushes the solid particles against the inner wall of the drum, forming a filter cake.

[0026] It should be noted that the adjustment mechanism 24 is not limited to a specific type of mechanism. As long as it can drive the rotating rod 22 to rotate around its own axis to adjust the distance between the scraper 23 and the filter cloth 13, no further details will be provided here.

[0027] In this specific embodiment, the adjustment mechanism 24 includes a driving member 241, a guide rod 242, and a transmission rod 243. The driving member 241 is electrically connected to the controller 26. The driving member 241 is fixedly mounted on one side of the top of the machine body 11 and is located above the rotating drum 12. The movable end of the driving member 241 is fixedly connected to one end of the guide rod 242, and the other end of the guide rod 242 passes through the rotating drum 12. The axis of the guide rod 242 is parallel to the axis of the rotating drum 12. One end of the transmission rod 243 is fixedly connected to the rotating rod 22, and the other end of the transmission rod 243 is slidably connected to the guide rod 242.

[0028] In this specific embodiment, both the telescopic member 21 and the driving member 241 are hydraulic cylinders. Of course, in other embodiments, the telescopic member 21 and the driving member 241 can also be electric push rods or pneumatic cylinders. Specifically, the telescopic member 21 is used to drive the rotating rod 22 to rise and fall, thereby driving the scraper 23 to rise and fall. When the driving member 241 pushes or pulls the transmission rod 243, it can drive the rotating rod 22 to rotate around its own axis, thereby adjusting the distance between the scraper 23 and the filter cloth 13. Specifically, the distance between the scraper 23 and the filter cloth 13 is always 1cm.

[0029] It should be noted that the transmission rod 243 has a strip-shaped hole 243a along its length, and the guide rod 242 slides through the strip-shaped hole 243a. The guide rod 242 is parallel to the axis of the rotating rod 22, and the axis of the transmission rod 243 is perpendicular to the axes of the guide rod 242 and the rotating rod 22.

[0030] Specifically, a distance sensor is a device that can measure the distance between objects. In this specific embodiment, the distance sensor is an infrared sensor. Of course, in other embodiments, the distance sensor can also be an ultrasonic sensor or a laser rangefinder.

[0031] It should be noted that, in order to improve the wear resistance of the filter cloth 13, in this specific embodiment, the filter cloth 13 is made of polyester filter cloth. Of course, in other embodiments, the filter cloth 13 can also be made of nylon filter cloth or polypropylene filter cloth.

[0032] Based on the above solution, in order to avoid the risk of metal foreign objects being generated by friction of the scraper 23, specifically, the scraper 23 is made of PEEK (polyetheretherketone) board. In addition, in order to extend the service life of the rotating rod 22, the guide rod 242 and the transmission rod 243, the rotating rod 22, the guide rod 242 and the transmission rod 243 are all coated with anti-corrosion coating.

[0033] To better understand this utility model, the following is combined with... Figures 1 to 4 The technical solution of this utility model is described in detail below:

[0034] After the dehydration process is completed, the scraper 23 starts to work. The distance sensor 25 on the scraper 23 measures the distance between itself and the filter cake in real time and transmits the signal to the controller 26. When the filter cloth bulges, causing the filter cake to be unevenly distributed on the filter cloth, if the distance sensor 25 measures a decrease in the distance between itself and the filter cake, then this is the location where the filter cloth bulges. The adjusting mechanism 24 drives the rotating rod 22 to rotate around its own axis, thereby driving the scraper 23 to rotate and adjusting the distance between the distance sensor 25 and the filter cake to the set value, thereby ensuring that the distance between the scraper and the filter cloth remains constant and preventing the scraper 23 from scratching the filter cloth.

[0035] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A scraping device for a centrifuge, said centrifuge comprising a machine body and a bowl rotatably arranged in said machine body, a side wall of said bowl being provided with a filter cloth, said scraping device comprising an extension, a rotary shaft, a scraper, an adjusting mechanism, a distance sensor and a controller, characterized in that, The telescopic component is fixed to the top of the machine body and its movable end is rotatably connected to the upper end of the rotating rod. The lower end of the rotating rod passes through the drum and is fixedly connected to the scraper. The telescopic component is used to drive the scraper to rise and fall. The adjustment mechanism is located on one side of the top of the machine body and is connected to the rotating rod. The adjustment mechanism is used to drive the rotating rod to rotate to adjust the distance between the scraper and the filter cloth. The distance sensor is fixed to one side of the scraper and is used to detect the distance between the scraper and the filter cake on the filter cloth. The distance sensor, the telescopic component, and the adjustment mechanism are electrically connected to the controller.

2. A scraper device for a centrifuge according to claim 1, characterized in that The adjustment mechanism includes a drive component, a guide rod, and a transmission rod. The drive component is fixedly mounted on one side of the top of the machine body and is located above the rotating drum. The movable end of the drive component is fixedly connected to one end of the guide rod, and the other end of the guide rod passes through the rotating drum. The axis of the guide rod is parallel to the axis of the rotating drum. One end of the transmission rod is fixedly connected to the rotating rod, and the other end of the transmission rod is slidably connected to the guide rod.

3. A scraper device for a centrifuge according to claim 2, wherein The transmission rod has a strip-shaped hole along its length, and the guide rod slides through the strip-shaped hole.

4. A scraper device for a centrifuge according to claim 2, wherein The axis of the guide rod is parallel to the axis of the rotating rod, and the axis of the transmission rod is perpendicular to the axes of the guide rod and the rotating rod.

5. A scraper device for a centrifuge according to claim 2, wherein The filter cloth is made of polyester, nylon, or polypropylene.

6. A scraper device for a centrifuge according to claim 2, wherein The rotating rod, guide rod, and transmission rod are all coated with an anti-corrosion coating.

7. A scraper device for a centrifuge according to claim 1, wherein The distance between the scraper and the filter cloth is 1 cm.

8. A scraper device for a centrifuge according to claim 1, characterized in that The scraper is made of PEEK board.

9. A scraper device for a centrifuge according to claim 1, wherein The centrifuge is a flatbed centrifuge.

10. A scraper device for a centrifuge according to claim 2, characterized in that The telescopic component and the driving component are both electric push rods, pneumatic cylinders or hydraulic cylinders.

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