Conductive slurry filtering device

Abstract

The invention relates to the technical field of filtering, in particular to a conductive slurry filtering device which comprises a rotary throwing filtering unit and a suction filtering unit which are arranged up and down, the rotary throwing filtering unit comprises an inverted-cone-shaped vertically-through filtering cone, and a spiral scraping plate is arranged on the inner wall of the inverted-cone-shaped vertically-through filtering cone in an attached mode. A non-rotation inner gear ring is arranged above the spiral scraping plate, three outer gear rings are in meshing transmission in the non-rotation inner gear ring, the outer gear rings are connected with three-wheel hole rings in a one-to-one mode through rotating supports, the three-wheel hole rings are upwards connected with outer sleeve rotating pipes, inner sleeve rotating pipes are coaxially arranged in the outer sleeve rotating pipes in a sleeved mode, and the inner sleeve rotating pipes are connected with the outer sleeve rotating pipes in a sleeved mode. The bottom end of the inner sleeve spiral pipe is connected with a positive pressure air pipe, detachable filter elements are arranged on the inner periphery of the outer gear ring, the positive pressure air pipe is located on the surrounding inner periphery of the three detachable filter elements, and a spiral scraping plate is located on the surrounding outer periphery of the three detachable filter elements; the rotating direction of the positive pressure air pipe is opposite to that of the three-wheel hole ring; the filtering speed and the filtering effect on the conductive slurry are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of filtration, and in particular to a conductive slurry filtration device. Background Art

[0002] Carbon nanotubes have broad application prospects in the fields of electronics and energy due to their unique structure and excellent electrical and mechanical properties. As an important functional material, carbon nanotube conductive paste is widely used in the manufacture of lithium batteries, touch screens and other products. For example, adding carbon nanotube conductive paste to the battery can improve battery performance. Lithium-ion battery conductive paste mainly includes carbon-based conductive paste, including conductive carbon black, conductive graphite, carbon nanotubes, graphene and mixed pastes.

[0003] In the production process of conductive slurry, various impurity particles are often mixed in the slurry. The presence of these impurities will seriously affect the quality of the conductive slurry, and then affect its application performance in the fields of battery manufacturing, electronic devices, etc. Existing filtering devices often have problems such as insufficient filtering accuracy, easy clogging and difficult cleaning of the filter element, and low filtering efficiency. For example, some traditional filtering devices only use a single filter for filtering, which cannot effectively remove tiny impurity particles, resulting in a large amount of impurities remaining in the conductive slurry, affecting its conductivity and stability. At the same time, the filter is easily clogged by impurities in the slurry during use, and the filter needs to be replaced frequently, which increases production costs and operating difficulties. Moreover, the existing filtering device has a relatively single way of handling the slurry during the filtration process, making it difficult to achieve efficient filtration and impurity separation. Therefore, it is of great practical significance to develop a conductive slurry filtering device that can filter with high precision, easy to clean the filter element and high filtering efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a conductive slurry filtering device. The present invention solves the problems of insufficient filtering accuracy of conductive slurry, difficulty in cleaning the filter element and low filtering efficiency in the prior art. Through a unique structural design and working mode, high-precision filtering of conductive slurry is achieved, while the cleaning and maintenance of the filter element are facilitated, thereby improving the filtering efficiency and the service life of the device.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: A conductive slurry filtering device, comprising a spin-throw filter unit and a suction filter unit arranged up and down, the spin-throw filter unit comprising an inverted cone-shaped upper and lower through-filter bucket, the inner wall of the inverted cone-shaped upper and lower through-filter bucket being fitted with a spiral scraper, a non-rotating inner gear ring is arranged above the spiral scraper, three outer gear rings are meshed and driven in the non-rotating inner gear ring, the outer gear ring is connected to three-wheel hole rings one by one through a rotating support, the three-wheel hole ring is upwardly connected to an outer sleeve rotary tube, an inner sleeve rotary tube is sleeved on the same central axis in the outer sleeve rotary tube, the bottom end of the inner sleeve rotary tube is connected to a positive pressure air pipe, a detachable filter element is arranged on the inner periphery of the outer gear ring, the positive pressure air pipe is located at the surrounding inner periphery of the three detachable filter elements, and the spiral scraper is located at the surrounding outer periphery of the three detachable filter elements; The rotation direction of the positive pressure air tube is opposite to that of the three-wheel hole ring; The suction filtration unit comprises a receiving hopper, a fine filter membrane and a negative pressure chamber which are sequentially connected from top to bottom, and the fine filter membrane is placed horizontally; The bottom of the spin filter unit is communicated with the top of the suction filter unit.

[0006] Furthermore, the top of the spiral scraper is connected with a lower notch hook, the bottom of the lower notch hook is connected with a C-shaped bayonet slip ring, the C-shaped bayonet slip ring is movably connected to a fixed ring frame, a plurality of electromagnets are arranged around the fixed ring frame, and a permanent magnet is arranged in the C-shaped bayonet slip ring.

[0007] Furthermore, the three-wheel hole ring is located above the non-rotating inner gear ring, the top of the outer sleeve rotary tube is connected to the first gear, the top of the inner sleeve rotary tube is connected to the rotating air guide joint, a second gear is arranged below the rotating air guide joint, and a third gear is synchronously meshed between the first gear and the second gear.

[0008] Furthermore, a lifting frame is provided on the side of the inverted cone-shaped filter bucket that passes through the top and bottom, and a supporting sleeve is provided on the lifting frame. The inner periphery of the supporting sleeve is connected to the outer periphery of the outer sleeve coil through a bearing, and the inner periphery of the outer sleeve coil (1g) is connected to the outer periphery of the inner sleeve coil through a bearing.

[0009] Furthermore, the number of the outer gear rings is 3 and the revolution and rotation are synchronously combined.

[0010] Furthermore, the pores of the fine filter membrane are smaller than those of the detachable filter element. The detachable filter element is open-topped and has an outwardly flared mouth ring connected to its top. The mouth ring is connected to the inner periphery of the outer gear ring in a sleeve-like manner.

[0011] Furthermore, the upper opening of the negative pressure chamber is capped by a fine filter membrane, and the side wall of the negative pressure chamber is connected to a negative pressure gas joint.

[0012] Furthermore, the outer side profile of the spiral scraper is arranged to fit the inner wall of the inverted cone-shaped vertically penetrating filter bucket, and the inner wall of the inverted cone-shaped vertically penetrating filter bucket is coated with an anti-stick coating.

[0013] Furthermore, the rotating air guide joint is communicated with the inside of the positive pressure air pipe, and the positive pressure air pipe is provided with a vertical long slit-shaped air blowing port, and the air blowing port can rotate 360 ​​degrees and face the entire outer wall of any detachable filter element.

[0014] Furthermore, the third gear is driven to rotate by a first motor, the first motor is fixedly mounted on the lifting frame, and the first gear and the second gear are both arranged perpendicular to the third gear.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a conductive slurry filtering device, with a multi-layer filter screen design of different apertures, namely, a detachable filter element and a fine filter membrane, which can realize the gradual fine filtration of the conductive slurry, effectively remove tiny impurity particles, and improve the quality of the conductive slurry; the spin-throw filter unit is synchronized by the revolution and rotation of the outer gear ring, and the reverse steering of the positive pressure air pipe and the three-wheel hole ring, so that the filter element can fully utilize the centrifugal force and the positive pressure airflow to filter the slurry and separate impurities during the rotation process, thereby improving the filtration efficiency. The suction filter unit generates negative pressure through the negative pressure chamber, further accelerating the filtration process of the slurry, and working in coordination with the spin-throw filter unit, greatly improving the overall filtration efficiency; reducing the adhesion of the slurry: the inner wall of the inverted cone-shaped filter bucket is coated with an anti-stick coating, and the outer side profile of the spiral scraper is arranged to fit the inner wall of the inverted cone-shaped filter bucket, which can effectively reduce the adhesion of the slurry on the inner wall of the filter bucket, and is easy to clean and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 The cross-sectional structure of the present invention is shown in FIG. Figure 1 ; Figure 4 for Figure 3 The enlarged view of point B; Figure 5 The cross-sectional structure of the present invention is shown in FIG. Figure 2 ; Figure 6 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ; Figure 7 for Figure 6 Enlarged view of point C; Figure 8 for Figure 6The enlarged view of point D; In the figure: 1, spin filter unit; 1a, inverted cone filter bucket; 1b, spiral scraper; 1c, non-rotating inner gear ring; 1d, outer gear ring; 1e, rotary support; 1f, three-wheel hole ring; 1g, outer sleeve spiral tube; 1h, inner sleeve spiral tube; 1i, positive pressure air pipe; 1i-1, air blowing port; 1j, detachable filter element; 1j-1, mouth ring; 1k, rotary air guide joint; 2, suction filter unit; 2a, receiving hopper; 2b, fine filter membrane; 2c, negative pressure chamber; 2c-1, negative pressure air joint; 3a, lower concave hook; 3b, C-type bayonet slip ring; 3c, fixed ring frame; 3d, electromagnet; 4a, first gear; 4b, second gear; 4c, third gear; 4d, first motor; 5, lifting frame; 5a, support sleeve. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] like Figures 1 to 8As shown, a conductive slurry filtering device comprises a spin-spin filter unit 1 and a suction filter unit 2 arranged in an upper and lower manner. The spin-spin filter unit 1 comprises an inverted cone-shaped filter bucket 1a which is connected from top to bottom. A spiral scraper 1b is arranged on the inner wall of the inverted cone-shaped filter bucket 1a which is connected from top to bottom. A non-rotating inner gear ring 1c is arranged above the spiral scraper 1b. Three outer gear rings 1d are meshed and driven in the non-rotating inner gear ring 1c. The outer gear ring 1d is connected to a three-wheel hole ring 1f through a rotating support 1e one by one. The three-wheel hole ring 1f is connected to an outer sleeve spiral tube 1g upward. An inner sleeve spiral tube 1h is sleeved on the same central axis in the outer sleeve spiral tube 1g. A positive pressure air pipe 1i is connected to the bottom end of the inner sleeve spiral tube 1h. A detachable filter element 1j is arranged on the inner periphery of the outer gear ring 1d. The positive pressure air pipe 1i is located on the inner periphery of the three detachable filter elements 1j. The spiral scraper 1b is located on the outer periphery of the three detachable filter elements 1j. The direction of the positive pressure air pipe 1i is opposite to that of the three-wheel hole ring 1f. The three-wheel hole ring 1f is located above the non-rotating inner gear ring 1c. The top of the outer sleeve coil 1g is connected to the first gear 4a, and the top of the inner sleeve coil 1h is connected to the rotating air guide joint 1k. A second gear 4b is arranged below the rotating air guide joint 1k, and a third gear 4c is synchronously meshed between the first gear 4a and the second gear 4b. The third gear 4c is driven to rotate by the first motor 4d, and the first motor 4d is fixedly mounted on the lifting frame 5. The first gear 4a and the second gear 4b are both arranged perpendicular to the third gear 4c. A lifting frame 5 is arranged on the side of the inverted cone-shaped filter bucket 1a that passes through the top and bottom. A support sleeve 5a is arranged on the lifting frame 5. The inner periphery of the support sleeve 5a is connected to the outer periphery of the outer sleeve coil 1g through a bearing, and the inner periphery of the outer sleeve coil 1g is connected to the outer periphery of the inner sleeve coil 1h through a bearing. Through the above settings, the number of outer gear rings 1d is 3 and the revolution and rotation are synchronously combined, which respectively drive the corresponding detachable filter element 1j to revolve and rotate synchronously, and use centrifugal force to produce an excellent spin-throwing filtering effect; among them, the detachable filter element 1j is open-topped and its top is connected with an outward-expanded mouth ring 1j-1, and the mouth ring 1j-1 is connected to the inner circumference of the outer gear ring 1d in a sleeve-type connection. The filter element is made of 314 / 316L stainless steel, resistant to NMP solvent corrosion, and can be disassembled for cleaning and reuse. The outer side profile of the spiral scraper 1b is set to fit the inner wall of the inverted cone-shaped upper and lower through-filter bucket 1a, and the inner wall of the inverted cone-shaped upper and lower through-filter bucket 1a is coated with an anti-stick coating to reduce slurry adhesion. The rotating air guide joint 1k is connected to the inside of the positive pressure air pipe 1i. The positive pressure air pipe 1i is provided with a vertical long slit-shaped air blowing port 1i-1. The air blowing port 1i-1 can rotate 360° and face the entire outer wall of any detachable filter element 1j.The top of the spiral scraper 1b is connected with a lower notch hook 3a, and the bottom of the lower notch hook 3a is connected with a C-type bayonet slip ring 3b. The C-type bayonet slip ring 3b is movably connected to a fixed ring frame 3c. A number of electromagnets 3d are arranged around the fixed ring frame 3c. A permanent magnet is arranged in the C-type bayonet slip ring 3. By controlling the electromagnets 3d to circulate and generate magnetism one by one, the C-type bayonet slip ring 3b is controlled to rotate under the action of magnetic attraction, thereby driving the spiral scraper 1b to rotate.

[0019] The suction filtration unit 2 includes a receiving hopper 2a, a fine filter membrane 2b and a negative pressure chamber 2c which are sequentially connected from top to bottom, and the fine filter membrane 2b is placed horizontally. The bottom of the spin filter unit 1 is connected to the top of the suction filtration unit 2, the filter pores of the fine filter membrane 2b are smaller than the filter pores of the detachable filter element 1j, the upper opening of the negative pressure chamber 2c is capped by the fine filter membrane 2b, and the side wall of the negative pressure chamber 2c is connected to a negative pressure gas joint 2c-1, and the conductive slurry on the fine filter membrane 2b is further filtered by drawing negative pressure. Spin-throw filtration: Start the first motor 4d, the first motor 4d drives the third gear 4c to rotate, and then the first gear 4a and the second gear 4b rotate synchronously. The first gear 4a drives the outer sleeve 1g to rotate, and the outer sleeve 1g drives the outer gear ring 1d to revolve through the three-wheel hole ring 1f and the rotating support 1e. At the same time, the outer gear ring 1d meshes with the non-rotating inner gear ring 1c to achieve self-rotation. The outer gear ring 1d drives the detachable filter element 1j to rotate synchronously, and uses centrifugal force to throw the filtered slurry to the inner wall of the inverted cone-shaped filter bucket 1a that passes through the filter bucket 1a from top to bottom. At the same time, the positive pressure air pipe 1i rotates in the opposite direction driven by the second gear 4b, and blows air to the outer wall of the detachable filter element 1j through the blowing port 1i-1, further assisting the filtration and improving the filtration efficiency. Under the action of the C-type bayonet slip ring 3b and the fixed ring frame 3c, the spiral scraper 1b moves along the inner wall of the inverted cone-shaped filter bucket 1a that passes through the filter bucket 1a from top to bottom, scrapes off the slurry attached to the inner wall of the filter bucket, and transports it to the suction filtration unit 2. Suction filtration: The slurry after spin filtration enters the hopper 2a of the suction filtration unit 2 through the bottom of the spin filtration unit 1, and then passes through the fine filter membrane 2b for secondary filtration. Negative pressure is applied to the negative pressure chamber 2c through the negative pressure air joint 2c-1 to accelerate the filtration process of the slurry through the fine filter membrane 2b, further remove the tiny impurity particles in the slurry, and finally obtain a high-precision conductive slurry.

[0020] Beneficial effects: High-precision filtration: The multi-layer filter design with different apertures, i.e. the detachable filter element 1j and the fine filter membrane 2b, can achieve gradual fine filtration of the conductive slurry, effectively remove tiny impurity particles, and improve the quality of the conductive slurry. Easy to clean the filter element: The removable filter element 1j is open-topped and connected to an outward-expanding mouth ring 1j-1 at the top, which is connected to the inner circumference of the outer gear ring 1d by a sleeve type, and can be easily removed for cleaning. It is made of 314 / 316L stainless steel, resistant to NMP solvent corrosion, and can be reused, reducing the cost of use. The positive pressure air pipe 1i is provided with a vertical long slit-shaped air blowing port 1i-1, which can rotate 360° and face the outer side wall of any removable filter element 1j. During the operation of the device, the filter element can be assisted by blowing to prevent impurities from clogging the filter element. Improved filtering efficiency: The spin filter unit 1 uses the synchronous combination of the revolution and rotation of the outer gear ring 1d, and the reverse rotation of the positive pressure air pipe 1i and the three-wheel hole ring 1f, so that the filter element can fully utilize the centrifugal force and positive pressure airflow to filter the slurry and separate impurities during the rotation process, thereby improving the filtering efficiency. The suction filter unit 2 generates negative pressure through the negative pressure chamber 2c, further accelerating the filtering process of the slurry, and working in conjunction with the spin filter unit 1, greatly improving the overall filtering efficiency. Reduce slurry adhesion: The inner wall of the inverted cone-shaped filter bucket 1a is coated with an anti-stick coating, and the outer side profile of the spiral scraper 1b is arranged to fit the inner wall of the inverted cone-shaped filter bucket 1a. By driving the spiral scraper 1b to rotate, the adhesion of slurry on the inner wall of the filter bucket can be effectively reduced, which is convenient for cleaning and maintenance.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. For ordinary technicians in this field, various changes, modifications or additions without departing from the concept of the present invention should all fall within the protection scope of the present invention.

Claims

1. A conductive slurry filtering device, characterized in that: The invention comprises a spin-spin filter unit (1) and a suction filter unit (2) arranged in an upper and lower manner, wherein the spin-spin filter unit (1) comprises an inverted cone-shaped upper and lower through filter bucket (1a), wherein a spiral scraper (1b) is arranged on the inner wall of the inverted cone-shaped upper and lower through filter bucket (1a), wherein a non-rotating inner gear ring (1c) is arranged above the spiral scraper (1b), wherein three outer gear rings (1d) are meshed and driven in the non-rotating inner gear ring (1c), and wherein the outer gear ring (1d) is connected to three wheel holes in a one-to-one manner through a rotating support (1e). The three-wheel hole ring (1f) is upwardly connected to an outer sleeve spiral tube (1g), the inner sleeve spiral tube (1h) is sleeved on the same central axis as the outer sleeve spiral tube (1g), the bottom end of the inner sleeve spiral tube (1h) is connected to a positive pressure air pipe (1i), the inner periphery of the outer gear ring (1d) is provided with a detachable filter element (1j), the positive pressure air pipe (1i) is located on the inner periphery of the three detachable filter elements (1j), and the spiral scraper (1b) is located on the outer periphery of the three detachable filter elements (1j); The rotation direction of the positive pressure air pipe (1i) is opposite to the rotation direction of the three-wheel hole ring (1f); The suction filtration unit (2) comprises a receiving hopper (2a), a fine filter membrane (2b) and a negative pressure chamber (2c) which are sequentially connected from top to bottom, and the fine filter membrane (2b) is placed horizontally; The bottom of the spin filter unit (1) is communicated with the top of the suction filter unit (2).

2. The conductive slurry filtering device according to claim 1, characterized in that: The top end of the spiral scraper (1b) is connected to a lower notch connecting hook (3a), the bottom end of the lower notch connecting hook (3a) is connected to a C-shaped bayonet slip ring (3b), the C-shaped bayonet slip ring (3b) is movably connected to a fixed ring frame (3c), a plurality of electromagnets (3d) are arranged around the fixed ring frame (3c), and a permanent magnet is arranged in the C-shaped bayonet slip ring (3b).

3. The conductive slurry filtering device according to claim 1, characterized in that: The three-wheel hole ring (1f) is located on the non-rotating inner gear ring (1c), the top end of the outer sleeve rotary tube (1g) is connected to a first gear (4a), the top end of the inner sleeve rotary tube (1h) is connected to a rotary air guide joint (1k), a second gear (4b) is arranged below the rotary air guide joint (1k), and a third gear (4c) is synchronously meshed between the first gear (4a) and the second gear (4b).

4. The conductive slurry filtering device according to claim 3, characterized in that: A lifting frame (5) is arranged on the side of the inverted cone-shaped filter bucket (1a) that penetrates from top to bottom, and a supporting sleeve (5a) is arranged on the lifting frame (5). The inner periphery of the supporting sleeve (5a) is connected to the outer periphery of the outer sleeve coil (1g) through a bearing, and the inner periphery of the outer sleeve coil (1g) is connected to the outer periphery of the inner sleeve coil (1h) through a bearing.

5. The conductive slurry filtering device according to claim 4, characterized in that: The number of the outer gear rings (1d) is three and they are synchronously combined in revolution and rotation.

6. The conductive slurry filtering device according to claim 1, characterized in that: The filter pores of the fine filter membrane (2b) are smaller than the filter pores of the detachable filter element (1j); the detachable filter element (1j) is open at the top and has an outwardly expanded mouth ring (1j-1) connected to its top; the mouth ring (1j-1) is connected to the inner periphery of the outer gear ring (1d) in a sleeve-like manner.

7. The conductive slurry filtering device according to claim 1, characterized in that: The upper opening of the negative pressure chamber (2c) is capped by a fine filter membrane (2b), and the side wall of the negative pressure chamber (2c) is connected to a negative pressure gas joint (2c-1).

8. The conductive slurry filtering device according to claim 1, characterized in that: The outer side profile of the spiral scraper (1b) is arranged to fit the inner wall of the inverted cone-shaped vertically penetrating filter bucket (1a), and the inner wall of the inverted cone-shaped vertically penetrating filter bucket (1a) is coated with an anti-stick coating.

9. The conductive slurry filtering device according to claim 3, characterized in that: The rotating air guide joint (1k) is connected to the inside of the positive pressure air pipe (1i), and the positive pressure air pipe (1i) is provided with a vertical long slit-shaped air blowing port (1i-1). The air blowing port (1i-1) can rotate 360 ​​degrees and face the entire outer wall of any detachable filter element (1j).

10. The conductive slurry filtering device according to claim 4, characterized in that: The third gear (4c) is driven to rotate by a first motor (4d), the first motor (4d) is fixedly mounted on a lifting frame (5), and the first gear (4a) and the second gear (4b) are both arranged perpendicular to the third gear (4c).

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