CN208161141U - Filter device - Google Patents

Abstract

The present application relates to the technical field of production of energy storage devices, and in particular to a filter device, comprising: a housing with a feed inlet and a discharge outlet; a filter cartridge arranged in the housing, and the filter cartridge has filter holes; and A draft tube is arranged in the filter cartridge, one end of the draft tube communicates with the feed inlet, and the other end extends to the top of the filter cartridge; and the end of the draft tube near the top The part is provided with an injection port towards the filter cartridge, and the inside of the guide pipe communicates with the interior of the filter cartridge through the injection port; the cavity between the filter cartridge and the housing communicates with the outlet feed port. The application can prevent the filter residue below from generating resistance to the flow of the slurry, and improve the filtration efficiency of the slurry.

Description

filter device

technical field

The present application relates to the technical field of production of energy storage devices, in particular to a filtering device.

Background technique

With the country's strong support for the new energy industry, the lithium battery industry has also entered a period of blowout development. As the core raw material of lithium batteries, the demand for cathode and anode powders is also increasing, and the production capacity of cathode and anode powders is also rapidly expanding. However, The incoming materials of cathode and anode powder often contain large particles, and the cathode and anode powder are usually made into slurry, and these large particles are filtered by a filter device.

In the prior art, the feed port of the filter device communicates with the interior of the filter cartridge at the bottom, and then flows out of the filter cartridge after filtering through the filter cartridge, and then flows out of the filter device. However, after the filter device has been used for a period of time, the filter residue produced by the filtration will sink to the bottom of the filter cartridge due to the effect of gravity. Since the feed inlet is arranged below, when the slurry just enters the filter cartridge, it will be affected. The obstruction of the filter residue slows down the flow rate and reduces the filtration efficiency of the filter cartridge.

Utility model content

The present application provides a filtering device, which can solve the above problems.

The application provides a filtering device, comprising:

The shell has a material inlet and a material outlet;

a filter cartridge disposed within the housing, the filter cartridge having filter holes; and

A guide tube, arranged in the filter cartridge, one end of the guide tube communicates with the feed inlet, and the other end extends to the top of the filter cartridge; and the end of the guide tube near the top The part is provided with an injection port towards the filter cartridge, and the inside of the guide pipe communicates with the inside of the filter cartridge through the injection port;

The cavity between the filter cartridge and the housing communicates with the discharge port.

Optionally, the opening area of the injection port decreases gradually along the injection direction from the inner wall of the draft tube to the outer wall.

Optionally, a plurality of injection ports are evenly distributed along the circumferential direction and the axial direction of the draft tube.

Optionally, along the axial direction of the draft tube, the size of the part of the draft tube provided with the injection port is less than or equal to one-third of the size of the draft tube.

Optionally, a communication hole is provided at the top end of the guide tube extending toward the top of the filter cartridge, and the inside of the guide tube communicates with the inside of the filter cartridge through the communication hole.

Optionally, the area of the cross section of the filter hole increases gradually along the direction from the inner wall of the filter cartridge to the outer wall.

Optionally, a plastic scraper is also included, the plastic scraper is rotatably connected to the housing around a rotating shaft parallel to the axis of the filter cartridge, and is attached to the inner wall of the filter cartridge.

Optionally, there are multiple plastic scrapers distributed along the circumference of the filter cartridge.

Optionally, the housing includes a first cylinder and a second cylinder connected to each other, and the second cylinder is disposed below the first cylinder;

The discharge port, the guide pipe, and the filter cartridge are all arranged on the first cylinder; the second cylinder is provided with a slag outlet; the first cylinder and the filter cartridge The cavity formed between the outer walls is isolated from the inside of the second cylinder and communicated with the discharge port; the cavity formed between the filter cartridge and the draft tube is connected to the second cylinder internal connectivity.

Optionally, the inner wall of the second cylinder converges toward the slag discharge port in a vertically downward direction.

The technical solution provided by the application can achieve the following beneficial effects:

The filter device provided by the application is provided with a guide tube extending to the top of the filter cartridge, and the guide tube is provided with a spray port. During the filtration process, the application guides the position where the slurry enters the filter cartridge through the guide tube. To the top of the filter cartridge, the slurry is filtered on the upper part of the filter cartridge as much as possible, and the filter residue is deposited on the bottom of the filter cartridge, so as to avoid the resistance of the filter residue below to the flow of the slurry and improve the filtration efficiency of the slurry; and the slurry passes through The effect of its own gravity will bring the filter residue to the bottom of the filter cartridge, preventing the filter residue from blocking the upper filter hole, and at the same time facilitating the collection of the filter residue; in addition, through the injection of the injection port, more parts of the slurry can be deposited on the filter cartridge. Filtering is carried out at the top, and the formed jet flow can also wash away the filter residue on the filter cartridge, clean the filter holes, and further improve the filtering effect of the filter device.

It is to be understood that both the foregoing general description and the following detailed description are exemplary only and are not restrictive of the application.

Description of drawings

Fig. 1 is a schematic structural view of a specific embodiment of the filtering device provided by the present application;

Fig. 2 is a cross-sectional view of a specific embodiment of the filtering device provided by the present application;

Fig. 3 is a sectional view along line A-A in Fig. 2;

Fig. 4 is a cross-sectional view of a specific embodiment of the draft tube in the filtering device provided by the present application.

Reference signs:

10-housing;

11 - feed port;

12 - discharge port;

13 - the first cylinder;

131-cylinder body;

132 - cover plate;

133 - isolation board;

1331-communication channel;

14 - the second cylinder;

141 - slag outlet;

20-filter cartridge;

22 - top;

23 - connecting flange;

30-drain tube;

31 - end;

32 - injection port;

33-communicating hole;

40 - plastic scraper;

50 - Motor.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

Detailed ways

The present application will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

The embodiment of the present application provides a filter device for filtering the slurry formed by the cathode and anode powder materials of the battery. As shown in Figures 1-4, the filter device includes a housing 10, a filter cartridge 20 and a draft tube 30, the housing 10 has a feed port 11 and a discharge port 12; the filter cartridge 20 is arranged in the housing 10, and the filter cartridge There are filter holes, and the filter holes pass through the cylinder wall of the filter cylinder 20 . The guide tube 30 is disposed in the filter cartridge 20 , one end of the guide tube 30 communicates with the feed port 11 , and the other end extends toward the top 22 of the filter cartridge 20 to reach an area close to the top 22 of the filter cartridge 20 . Wherein, the end 31 of the guide tube 30 near the top 22 of the filter cartridge 20 is provided with an injection port 32 towards the filter cartridge 20, and the inside of the guide tube 30 communicates with the inside of the filter cartridge 20 through the injection port 32; The cavity between the housings 10 communicates with the discharge port 12 .

The above-mentioned filter device is provided with a guide tube 30 extending to the top 22 of the filter cartridge 20, and the guide tube 30 is provided with a jet port 32. When the filter device is in operation, the slurry enters the guide tube 30 from the feed port 11 , the slurry is guided to the area near the top 22 of the filter cartridge 20 through the guide tube 30, and then the slurry is sprayed onto the inner wall of the filter cartridge 20 through the injection port 32, and filtered through the filter holes on the filter cartridge 20, the filtered The slurry enters the cavity between the filter cartridge 20 and the housing 10 , and then exits the filter device through the outlet 12 ; the filter residue formed on the inner wall of the filter cartridge 20 is deposited to the bottom of the filter cartridge 20 under the action of gravity. Obviously, in this application, the position where the slurry enters the filter cartridge 20 is guided to the top of the filter cartridge 20, so that the slurry can be filtered on the upper part of the filter cartridge 20 as much as possible, and the filter residue is deposited below the filter cartridge 20. Therefore, The slurry entering the filter cartridge 20 can avoid the hindrance of the filter residue below, thereby increasing the flow rate of the slurry, which is beneficial to the improvement of the filtration efficiency; and the slurry can bring the filter residue on the inner wall of the filter cartridge 20 to the filter cartridge through the action of its own gravity The bottom of 20 prevents the filter residue from clogging up the filter hole on the top, and is beneficial to the collection of filter residue; in addition, the slurry is formed into a jet flow through the injection port 32, so that more parts of the slurry can be filtered on the top of the filter cartridge 20, and The formed jet flow can also wash away the filter residue on the filter cartridge 20 to clean the filter holes and further improve the filtering effect of the filter device.

Specifically, the housing 10 includes a first cylinder 13 and a second cylinder 14 connected to each other, and the second cylinder 14 is disposed below the first cylinder 13, that is, the first cylinder 13 and the second cylinder 14 are Vertical orientation setting. The discharge port 12, the guide pipe 30, and the filter cartridge 20 are all set on the first cylinder 13; the second cylinder 14 is provided with a slag discharge port 141, and the feed port 11 can be set on the first cylinder 13 or the second cylinder Body 14, as shown in Figures 1 and 2, the cavity formed between the first cylinder 13 and the outer wall of the filter cartridge 20 is used to accommodate the filtered slurry, which is isolated from the inside of the second cylinder 14, and The cavity is communicated with the discharge port 12; the cavity formed between the filter cartridge 20 and the draft tube 30 is communicated with the inside of the second cylinder 14, so that the filtered filter residue is discharged into the second cylinder 14, and then Discharged from the slag discharge port 141, that is to say, a slurry cavity is formed between the first cylinder 13 and the filter cartridge 20, and the second cylinder 14 forms a filter residue cavity, and the two are independent and isolated from each other (only by connected through the filter holes). After setting in this way, the filtered slurry and filter residue enter into different spaces respectively. When the filter residue accumulates a lot, it can be discharged directly through the slag discharge port 141, and there is no need to stop the filtration of the slurry, thereby saving the slurry. Filtration time; or while filtering, the deposited filter residue is directly discharged through the slag discharge port 141.

The first cylinder 13 includes a cylinder part 131 , a cover plate 132 connected to both ends of the cylinder part 131 and a separation plate 133 , and the filter cartridge 20 can be fixed to the first cylinder 13 through the cover plate 132 and the separation plate 133 . The separation plate 133 separates the interior of the first cylinder 13 from the interior of the second cylinder 14 , and the feeding port 11 may be disposed on the second cylinder 14 . The isolation plate 133 can be provided with a plurality of communication passages 1331, and the cavity formed between the filter cartridge 20 and the draft pipe 30 communicates with the inside of the second cylinder 14 (ie, the filter residue cavity) through the communication passages 1331, and is connected with the inlet The feed port 11 is isolated. In this way, since the filter residue chamber is completely isolated from the feed inlet 11 , the filter residue will not be brought into the draft tube 30 again for filtration, so the filtration efficiency of the filter device can also be improved.

Optionally, the material outlet 12 is arranged at the part of the first cylinder 13 close to the second cylinder 14, so that the material outlet 12 is located as low as possible in the slurry chamber so as to facilitate the discharge of the slurry. In the vertical direction, the position of the discharge port 12 may be higher than that of the feed port 11 .

The inner wall of the second cylinder 14 converges toward the slag discharge port 141 in a vertically downward direction, such as the second cylinder 14 is funnel-shaped to facilitate the collection of filter residues. Preferably, the slag discharge port 141 is arranged on the second cylinder 14 to further facilitate the collection and discharge of filter residue.

Further, the filter device also includes a plastic scraper 40, the plastic scraper 40 is connected to the housing 10 around a rotating shaft parallel to the axis of the filter cartridge 20, the plastic scraper 40 is arranged in the filter cartridge 20, and is attached to the inner wall of the filter cartridge 20 together, as shown in Figure 2. In each of the above-mentioned embodiments, even if there is a jet of slurry to wash the filter cartridge 20, when the filtration time of the filter device is relatively long, some filter residue may remain on the inner wall of the filter cartridge 20. When the remaining filter residue on the cylinder 20 affects the filtering effect, the plastic scraper 40 can be driven to rotate to clean the filter cylinder 20 . In this application, the plastic scraper 40 is provided to reduce the abrasion of the scraper and the filter cartridge 20; and even if the plastic scraper 40 is worn, since the material of the worn debris is plastic, if it is brought into the electrode assembly by the slurry, it will not It will cause a short circuit risk to the battery cells, therefore, the use of this plastic scraper 40 is also beneficial to improve the safety of the battery cells prepared in the later stage. Especially when the filter cartridge 20 is made of metal, the collision between the scraper and the filter cartridge 20 can be slowed down, and the service life of the filter cartridge 20 can be prolonged.

It should be noted that the plastic scraper 40 can always rotate when the slurry is filtered, and can also be rotated when there is more filter residue on the filter cartridge 20, and when the plastic scraper 40 is working, the slurry can be filtered at the same time, or it can be stopped. Filtration of slurry. The plastic scraper 40 can be driven by a motor 50, and the motor 50 is installed on the casing 10 and connected with the plastic scraper 40, as shown in FIG. 2 .

Specifically, there may be only one plastic scraper 40 , or there may be a plurality of them distributed along the circumferential direction of the filter cartridge 20 . When multiple plastic scrapers 40 are provided, the efficiency of removing filter residues can be improved. Optionally, there are two plastic scrapers 40 , so as to ensure the cleaning efficiency of filter residues, and at the same time reduce the friction between the plastic scrapers 40 and the filter cartridge 20 , and reduce the damage to the filter cartridge 20 .

It can be understood that the filter cartridge 20 may be directly wound from a mesh screen, or may include a bracket and a mesh screen fixed on the bracket, wherein the mesh screen may be made of stainless steel with filter holes provided thereon. Either way, connecting flanges 23 may be provided at both ends of the filter cartridge 20 , and the filter cartridge 20 is fixedly connected to the housing 10 through the connecting flanges 23 .

The filter cartridge 20 has a plurality of filter holes evenly distributed along its circumference and axial direction, so as to increase the filtering efficiency of the filter cartridge 20 . Specifically, the number of filter holes can be determined according to the specific conditions of the slurry.

Wherein, the filter hole can be a cylindrical hole or a square hole. In one embodiment, the cross-sectional area of the filter hole increases gradually along the direction from the inner wall of the filter cartridge 20 to the outer wall, such as a tapered hole, a wedge-shaped hole, etc. , to block larger particles from entering the filter holes on the inner wall of the filter cartridge 20, preventing large particles from clogging the filter holes and affecting the filtration efficiency; service life.

Optionally, the opening area of the injection port 32 decreases gradually along the injection direction of the slurry (that is, the direction from the inner wall of the draft tube 30 to the outer wall), such as the injection port 32 is a tapered hole or a wedge-shaped hole, to improve the jet flow. The injection force of the filter cartridge 20 can be increased, so that more slurry can be filtered in the area near the top 22 of the filter cartridge 20. At the same time, the increase of the spray force can also improve the scouring force of the slurry on the filter cartridge 20, making the inner wall of the filter cartridge 20 more stable. clean to improve the filtering effect of the filter cartridge 20.

In one embodiment, a plurality of injection ports 32 are evenly distributed along the circumferential and axial directions of the draft tube 30, so as to increase the passage for the slurry to reach the filter cartridge 20, so that the slurry can be sprayed to the filter cartridge in all directions 20, especially when the filter cartridge 20 has a plurality of filter holes distributed along the circumferential direction, the filtration efficiency of the slurry can be improved. Of course, the injection ports 32 may also be arranged only along the circumference of the draft tube 30 or only along the axial direction of the draft tube 30 .

Wherein, the guide pipe 30 may be fixed to the casing 10 to ensure its guiding effect on the slurry.

In order to improve the filtering effect of the filter device, as shown in Fig. 4, along the axial direction of the draft tube 30, the size H of the part (i.e. the end 31) provided with the injection port 32 on the draft tube 30 is less than or equal to that of the draft tube. One-third of the size L of 30, that is, H≤1/3L, such as the size H is 1/3L, 1/4L, 2/5L, etc., that is to say, the end 31 is distributed along the axis of the draft tube 30 A plurality of injection ports 32, in this arrangement, the injection ports 32 are set relatively concentrated and far away from the bottom of the filter cartridge 20, so that the ejected jet stream scours the filter cartridge 20 from top to bottom to lower the filter cartridge 20. Possibility of filter cake formation in the upper part.

Further, the top end of the draft tube 30 extending to the top 22 of the filter cartridge 20 (ie, the top end of the end portion 31) is provided with a communication hole 33, as shown in Figures 2 and 4, the axis of the communication hole 33 is aligned with the injection port 32 The axis intersects, even perpendicular, and the inside of the guide tube 30 is also communicated with the inside of the filter cartridge 20 through the communication hole 33, that is to say, the slurry in the guide tube 30 can pass through the two channels of the injection port 32 and the communication hole 33 Entering into the cavity between the filter cartridge 20 and the guide pipe 30, after being set in this way, the passage for the slurry to enter the filter cartridge 20 is increased, thereby improving the filtering effect of the filter device.

Wherein, the guide tube 30 can be a cylindrical tube, the communication hole 33 can be a circular hole, and the diameter of the communication hole 33 is less than or equal to 1/2 of the diameter of the guide tube 30, such as the diameter of the communication hole 33 is 1/2 of the diameter of the guide tube 30. 2/5, 1/5, 1/4, 1/3, 1/2, etc. of the diameter, preferably the diameter of the communication hole 33 is 1/2 of the diameter of the draft tube 30, so as to ensure the injection of the communication hole 33 The scouring strength of the flow can also improve the filtration efficiency of the filter device.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. a kind of filter device, which is characterized in that including：

Shell has inlet port and outlet port；

Filter cylinder is set in the shell, and the filter cylinder has filter hole；With

Diversion pipe is set in the filter cylinder, and one end of the diversion pipe is connected to the feed inlet, and the other end is to the filter cylinder Top extend；And the diversion pipe is provided with the jet port towards the filter cylinder, the water conservancy diversion close to the end at the top The inside of pipe is connected to by jet port with the inside of the filter cylinder；

Cavity between the filter cylinder and the shell is connected to the discharge port.

2. filter device according to claim 1, which is characterized in that the opening area of the jet port is along the diversion pipe Inner wall be directed toward outer wall injection direction be gradually reduced.

3. filter device according to claim 1, which is characterized in that circumferential direction of the jet port along the diversion pipe, axis It is multiple to being distributed with.

4. filter device according to claim 1, which is characterized in that along the axial direction of the diversion pipe, on the diversion pipe Be provided with the part of the jet port size be less than or equal to the diversion pipe size one third.

5. filter device according to claim 1, which is characterized in that the diversion pipe extends to the top of the filter cylinder Top is equipped with intercommunicating pore, and the inside of the diversion pipe also passes through the intercommunicating pore and is connected to the inside of the filter cylinder.

6. filter device according to claim 1, which is characterized in that the area of the cross section of the filter hole is along the filter The direction that the inner wall of cylinder is directed toward outer wall is gradually increased.

7. filter device according to claim 1-6, which is characterized in that it further include plastic spatula, the plastics Scraper is rotationally connected with the shell around the rotation axis for the axis for being parallel to the filter cylinder, and is bonded with the inner wall of the filter cylinder.

8. filter device according to claim 7, which is characterized in that the plastic spatula is circumferentially distributed along the filter cylinder Have multiple.

9. filter device according to claim 1-6, which is characterized in that the shell includes interconnected One cylinder and the second cylinder, second cylinder are set to the lower section of first cylinder；

The discharge port, the diversion pipe, the filter cylinder are all set in first cylinder；Second cylinder is provided with deslagging Mouthful；The internal insulation of the cavity that is formed between first cylinder and the outer wall of the filter cylinder and second cylinder, and with institute State discharge port connection；The cavity formed between the filter cylinder and the diversion pipe is connected to the inside of second cylinder.

10. filter device according to claim 9, which is characterized in that the inner wall of second cylinder is along straight down It is collapsed to the slag-drip opening in direction.