CN219681832U

CN219681832U - Filtering device with bubble removing function

Info

Publication number: CN219681832U
Application number: CN202320483708.1U
Authority: CN
Inventors: 陈彬
Original assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Current assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-09-15
Anticipated expiration: 2033-03-14

Abstract

The utility model provides a filtering device with a defoaming function, which comprises a cavity, a top cover, a filtering component and an exhaust component. The top cover is fixedly arranged at the top of the cavity; the filter assembly is arranged in the cavity and connected to the top cover; the exhaust assembly is fixedly arranged on the top cover and is far away from one side of the cavity. Opening an exhaust assembly, and closing the exhaust assembly until the liquid to be filtered enters the cavity from a liquid inlet pipe fixedly arranged on the cavity and is discharged from a full pipe of the exhaust assembly; after the liquid to be filtered is filtered by the filter assembly, the liquid is discharged from a liquid outlet pipe which is fixedly arranged on the top cover and communicated with the filter assembly. According to the utility model, in the anode and cathode coating process of the lithium ion battery, when slurry is stirred by the screw pump and enters the filtering device, bubbles are generated in the slurry, and the bubbles cause abnormality in the pole piece coating process. The air bubbles are effectively discharged through the air discharge assembly; meanwhile, the outer side of the filtering component adopts a quick-dismantling structure, and the filtering component is convenient to clean and replace.

Description

Filtering device with bubble removing function

Technical Field

The present utility model relates to a filtering device, and more particularly, to a filtering device with a defoaming function.

Background

The lithium battery diaphragm coating slurry can generate a large amount of foam in the preparation process of stirring, grinding and the like, the conveying process of the slurry, the coating process and the recycling process, and the foam is difficult to be naturally defoamed through standing in a short time. A large amount of foam can influence the coating effect of the lithium battery diaphragm, so that poor appearance of products such as bubbles, missing coating and the like is caused, the qualification rate and the production efficiency of the products are reduced, and the safety use of the battery is influenced after the coating diaphragm with poor appearance is assembled to the battery.

Therefore, the lithium battery coating equipment needs to remove bubbles from the used slurry before coating so as to prevent uneven coating caused by the existence of bubbles on the surface of the pole piece. However, at present, there is no device for effectively defoaming slurry with various viscosities, generally, defoaming is realized by stirring slurry in a container under vacuum condition after pulping is completed, and the defoaming mode is easy to cause insufficient defoaming due to a single defoaming method, and is not applicable to slurry with higher viscosity, because the slurry with higher viscosity needs to be increased in vacuum degree and prolonged in stirring time to achieve the required defoaming effect, but not only the production efficiency is reduced, but also a large amount of volatile components in the slurry are lost, so that the components of the slurry are changed, and the performance and subsequent production and processing of the slurry are affected. Therefore, a degassing system with low cost, good defoaming effect and short degassing time is needed, and the exhausting and cleaning work of the cavity is effectively reduced.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a filtering device with a bubble removing function, which is used for solving the problem that a large amount of bubbles generated by slurry in the filtering device cannot be effectively discharged after the slurry enters the filtering device through a screw pump in the prior art.

To achieve the above and other related objects, the present utility model provides a filtering device with a bubble removing function, comprising:

a cavity; the top cover is fixedly arranged at the top of the cavity;

the filter assembly is arranged in the cavity and connected to the top cover; and

the exhaust assembly is fixedly arranged on the top cover and is far away from one side of the cavity;

when the filtering device starts to work, the exhaust assembly is started, liquid to be filtered enters the cavity from a liquid inlet pipe fixedly arranged on the cavity, and the exhaust assembly is closed until the liquid to be filtered is discharged from the exhaust assembly through a full pipe; after the liquid to be filtered is filtered by the filter assembly, the liquid is discharged by a liquid outlet pipe which is fixedly arranged on the top cover and communicated with the filter assembly.

In an embodiment of the utility model, the filtering component includes a sleeve and a filter screen, and the sleeve is fixedly connected with the liquid outlet pipe on the top cover.

In an embodiment of the utility model, the filter screen is sleeved on the periphery of the sleeve, and the filter screen is fixed on the sleeve through a fixing piece.

In an embodiment of the utility model, the liquid outlet pipe is provided with a liquid outlet pipe connecting part at one side of the top cover close to the sleeve, and the sleeve connecting part on the sleeve is in threaded connection with the liquid outlet pipe connecting part, so that the liquid outlet pipe is communicated with the sleeve and is fixedly connected with the top cover respectively.

In an embodiment of the utility model, the exhaust assembly includes an exhaust pipe and an exhaust valve, the exhaust pipe is fixedly connected with the top cover through the exhaust port arranged on the top cover, and the exhaust pipe is communicated with the inside of the cavity.

In an embodiment of the present utility model, the exhaust valve is disposed on the exhaust pipe, and the exhaust component exhausts the gas in the cavity through the exhaust valve.

In an embodiment of the utility model, the top cover is fixedly connected with the cavity by a quick-release structure, and the quick-release structure is a ring-shaped quick clamp.

In an embodiment of the utility model, when the liquid outlet pipe has bubbles, stopping the operation; and opening the exhaust valve on the exhaust assembly to exhaust the gas in the cavity.

In an embodiment of the present utility model, the filtering device adopts a lower-inlet upper-outlet structure, performs the liquid running operation through a liquid inlet pipe arranged in the cavity, and discharges the liquid through a liquid outlet pipe arranged in the top cover, so as to ensure that the cavity is filled from bottom to top, and ensure that the gas is positioned at the upper part of the liquid surface.

In an embodiment of the present utility model, when the liquid level in the cavity is full and overflows through the exhaust valve on the exhaust assembly, the exhaust valve is closed, so as to complete the bubble removal operation of the filtering device.

As described above, the filtering device with the bubble removing function of the utility model has the following beneficial effects:

a liquid outlet is newly formed in a traditional stainless steel outer cover, a pipeline is closed by a manual valve to discharge air, when coating is started, slurry enters a stainless steel bag type cavity from a coating buffer tank through a screw pump until the slurry is discharged from a pipeline port through a full pipe, the pipeline valve is closed, and the slurry enters a die cavity through a conveying pipeline, so that the slurry feeding and air discharging process is completed. When bubbles appear in the coating process, an exhaust valve positioned on an exhaust pipeline can be opened, slurry exhaust operation is carried out on the cavity of the filtering device, and then the bubble removal operation is completed by combining a slurry beating and backflow mode in the pipeline. Meanwhile, the filter screen is installed by adopting a quick-dismantling structure and can be circularly replaced, so that the aim of saving cost is fulfilled. When the slurry feeding pressure exceeds a threshold value, the outer filter screen is removed after the filter sleeve is taken out, and a new filter screen is replaced again or the old filter screen is cleaned and then is installed for use.

Drawings

Fig. 1 is a schematic structural view of a filtering device with a defoaming function according to the present utility model.

Fig. 2 (a) shows an exploded view of the sleeve structure and the top cover structure of the present utility model, and (b) shows a structural view of the filter screen and the fastener.

Description of element reference numerals

A cavity 1 and a liquid inlet pipe 11;

top cover 2, liquid outlet pipe 21, liquid outlet pipe connecting portion 22;

the filter assembly 3, the sleeve 31, the sleeve connecting part 311, the filter screen 32 and the fixing piece 33;

an exhaust assembly 4, an exhaust port 41, an exhaust pipe 42, and an exhaust valve 43.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.

Please refer to fig. 1-2. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

Referring to fig. 1, the present utility model provides a filtering device with bubble removal function, which comprises a cavity 1, a top cover 2, a filtering component 3 and an exhaust component 4, wherein the top cover 2 is fixedly arranged at the top of the cavity 1. The filter assembly 3 is arranged in the cavity 1 and is connected to the top cover 2; the exhaust assembly 4 is fixedly arranged on the top cover 2 and is far away from one side of the cavity 1. When the filtering device starts to work, the exhaust assembly 4 is opened, liquid to be filtered enters the cavity 1 from the liquid inlet pipe 11 fixedly arranged on the cavity 1, and the exhaust assembly 4 is closed until the liquid to be filtered is discharged from the full pipe of the exhaust assembly 4. After the liquid to be filtered is filtered by the filter assembly 3, the filtered liquid is discharged from a liquid outlet pipe 21 which is fixedly arranged on the top cover 2 and is communicated with the filter assembly 3. The slurry is fed into the stainless steel cavity 1 by a screw pump in a mode of 'lower inlet and upper outlet'. When the slurry in the cavity 1 can be fully discharged from the exhaust hole 41, the exhaust valve 43 can be closed, and the slurry in the sleeve 31 flows out through the discharge pipe 21 on the top cover 2, passes through the coating valve and the reflux valve group, and finally flows into the die cavity of the coating die head.

In connection with fig. 2 (a), the filter assembly 3 comprises a sleeve 31 and a filter screen 32. The sleeve 31 is fixedly connected with the liquid outlet pipe 21 on the top cover 2. The filter screen 32 is sleeved on the outer periphery of the sleeve 31, and the filter screen 32 is fixed on the sleeve 31 through the fixing piece 33. The drain pipe 21 is equipped with drain pipe connecting portion 22 in the top cap 2 side that is close to sleeve 31, sleeve connecting portion 311 and drain pipe connecting portion 22 threaded connection on the sleeve 31 for drain pipe 21 is linked together with sleeve 31, and just is fixed connection with top cap 2 respectively. The exhaust assembly 4 includes an exhaust pipe 42 and an exhaust valve 43, the exhaust pipe 42 fixedly connects the exhaust pipe 42 with the top cover 2 through an exhaust port 41 provided on the top cover 2, and allows the exhaust pipe 42 to communicate with the inside of the chamber 1. An exhaust valve 43 is provided in the exhaust pipe 42, and the exhaust unit 4 exhausts the gas in the chamber 1 through the exhaust valve 43. Thereby realizing the operation of the filtering device for exhausting (removing bubbles).

Referring to fig. 1 and fig. 2, in a preferred embodiment of the present utility model, the top cover 2 is fixedly connected to the cavity 1 by a quick-release structure, and the quick-release structure is a ring-shaped quick-release clip. The filtering device adopts a lower-inlet upper-outlet structure, performs liquid running operation through the liquid inlet pipe 11 arranged in the cavity 1, is discharged through the liquid outlet pipe 21 arranged in the top cover 2, ensures that the cavity 1 is filled from bottom to top, and ensures that gas is positioned at the upper part of the liquid level. The exhaust port 41 is arranged at the position of the top cover 2 close to the edge 4CM, the diameter of the exhaust pipe 42 is 2CM, a manual switch valve-exhaust valve 43 is connected to the exhaust pipe 42, the exhaust of the slurry is controlled by closing the exhaust valve 43, and a stainless steel barrel is placed at the outlet of the exhaust pipe 42 to collect and recycle the discharged slurry. The sleeve 31 is made of stainless steel, and 80mm from the top end opening is designed as an internal thread and is in threaded connection with the liquid outlet pipe connecting part 22.

Fig. 2 (b) is a schematic view of a filter mesh and a fastener, the filter mesh 32 may be a SUS304 stainless steel filter mesh having a cylindrical structure and designed as an opening structure at the top, and the inner diameter of the filter mesh 32 is equal to the outer diameter of the sleeve 31, so that the filter mesh 32 may be nested on the outer wall of the sleeve 31. The outer wall of the filter screen 32 is provided with a fastening structure, through which the upper end of the filter screen 32 is fastened to the upper end of the sleeve 31, and the connection mode thereof may be other suitable fixing modes. Through the cooperation of the sleeve 31 and the filter screen 32, the slurry filtering function can be effectively realized; and can ensure that the sleeve 31 and the filter screen 32 are convenient to detach, and is beneficial to the periodic cleaning and replacement of the filter screen 32.

Referring to fig. 1, when the slurry loading pressure in the chamber 1 exceeds 0.4MPa, the buckle of the top cover 2 is opened above the capsule chamber 1. The filter sleeve 31 can be conveniently taken out, the filter screen 32 on the outer layer of the sleeve 31 is taken down, and a new filter screen is replaced again or an old filter screen is cleaned and then is installed for use. When the liquid level in the cavity 1 is full and overflows through the exhaust valve 43 on the exhaust assembly 4, the exhaust valve 43 can be closed, and the bubble removing operation of the filtering device is completed. If the liquid outlet pipe 21 is found to generate bubbles in the production process, stopping the operation; the exhaust valve 43 on the exhaust assembly 4 is opened so that the gas in the chamber 1 is exhausted.

According to the filtering device with the defoaming function, through the matching of the feed inlet, the tank body and the filter screen, the slurry can be filtered and mixed when materials are fed, the coating buffer tank is fully stirred by the screw pump, precipitation and impurity mixing are prevented, the quality of the internal mixed materials is affected, the sealing performance between the cavity and the tank body is better through the extrusion of the annular rapid clamp to the top cover, the situation of material overflow is further avoided, and the filtering device is convenient for people to use. The cavity and the top cover are connected and fixed by adopting an annular rapid clamp, and a valve arranged in an exhaust port and capable of controlling the closing of a pipeline is arranged above the top cover. The stainless steel round hole sleeve in the cavity is screwed with the top cover in a threaded mode, the detachable filter screen can be 80-200 meshes, impurities in slurry are effectively filtered, the stainless steel round hole sleeve is fixed on the sleeve through the annular quick buckle arranged outside the filter screen, and replacement and cleaning operations are facilitated.

The device has the advantages of simple structure, easy operation, good maintenance and high defoaming efficiency, does not need to use a defoaming agent for defoaming, reduces the production cost and improves the yield of products. The device adopts a physical method to remove bubbles, thereby reducing the influence of chemical defoamer on the environment. In the positive and negative electrode coating process of the lithium ion battery, the slurry enters the filtering device through the screw pump to generate bubbles in the slurry, and the bubbles can cause abnormality in the pole piece coating process. For example, the bubbles can cause abnormal explosion points, pits, foil leakage and the like on the coated pole piece, so that the qualification rate of finished products of the pole piece is reduced, the battery performance of pole piece assembly is poor, and the consistency of products is poor.

In summary, according to the filtering device with the bubble removing function, a liquid outlet is newly formed in the traditional stainless steel housing, and a manual valve is used for closing a pipeline to perform slurry air exhausting operation. And the slurry enters the stainless steel bag type cavity from the coating buffer tank through the screw pump until the slurry fills the exhaust pipe, the valve of the exhaust pipe is closed, and the slurry enters the die cavity through the conveying pipeline, so that the slurry feeding and air exhausting process is completed. When bubbles appear in the production process, slurry exhaust operation can be performed on the cavity of the filtering device through the exhaust valve arranged on the exhaust pipe, and then the bubble removal operation is completed by combining a slurry beating and backflow mode in the pipeline. Meanwhile, the filter screen and the sleeve adopt quick-release structures and can be replaced circularly, so that the cost is saved. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model, and it is intended that the appended claims be interpreted as covering all equivalent modifications and variations as fall within the true spirit and scope of the utility model.

Claims

1. A filtering apparatus with bubble removal function, comprising:

a cavity (1);

the top cover (2) is fixedly arranged at the top of the cavity (1);

the filter assembly (3) is arranged in the cavity (1) and is connected to the top cover (2); the method comprises the steps of,

the exhaust assembly (4) is fixedly arranged on the top cover (2) and is far away from one side of the cavity (1);

when the filtering device starts to work, the exhaust assembly (4) is started, liquid to be filtered enters the cavity (1) from a liquid inlet pipe (11) fixedly arranged on the cavity (1), and the exhaust assembly (4) is closed until the liquid to be filtered is discharged from the full pipe of the exhaust assembly (4); after the liquid to be filtered is filtered by the filter assembly (3), the liquid is discharged by a liquid outlet pipe (21) which is fixedly arranged on the top cover (2) and is communicated with the filter assembly (3).

2. The filtering device with bubble removal function according to claim 1, wherein: the filtering component (3) comprises a sleeve (31) and a filter screen (32), and the sleeve (31) is fixedly connected with the liquid outlet pipe (21) on the top cover (2).

3. The filtering device with bubble removal function according to claim 2, wherein: the filter screen (32) is sleeved on the periphery of the sleeve (31), and the filter screen (32) is fixed on the sleeve (31) through a fixing piece (33).

4. A filtering device with bubble removal function as claimed in claim 3, wherein: the drain pipe (21) is in top cap (2) is close to one side of sleeve (31) is equipped with drain pipe connecting portion (22), sleeve connecting portion (311) on sleeve (31) with drain pipe connecting portion (22) threaded connection makes drain pipe (21) with sleeve (31) are linked together, and respectively with top cap (2) fixed connection.

5. A filtering device with bubble removal function as claimed in claim 3, wherein: the exhaust assembly (4) comprises an exhaust pipe (42) and an exhaust valve (43), wherein the exhaust pipe (42) is fixedly connected with the top cover (2) through an exhaust port (41) formed in the top cover (2), and the exhaust pipe (42) is communicated with the inside of the cavity (1).

6. The filtering device with bubble removal function according to claim 5, wherein: the exhaust valve (43) is arranged on the exhaust pipe (42), and the exhaust assembly (4) discharges the gas in the cavity (1) through the exhaust valve (43).

7. The filtering device with bubble removal function according to claim 6, wherein: the top cover (2) is fixedly connected with the cavity (1) through a quick-dismantling structure, and the quick-dismantling structure is a circular quick clamp.

8. The filtering device with bubble removal function according to claim 7, wherein: stopping the operation when the liquid outlet pipe (21) has bubbles; -opening the exhaust valve (43) on the exhaust assembly (4) so that the gas in the cavity (1) is exhausted.

9. The filtering device with bubble removal function according to claim 8, wherein: the filtering device adopts a lower inlet and upper outlet structure, performs liquid running operation through the liquid inlet pipe (11) arranged in the cavity (1), is discharged through the liquid outlet pipe (21) arranged in the top cover (2), ensures that the cavity (1) is filled from bottom to top, and ensures that gas is positioned on the upper part of the liquid level.

10. The filtering device with bubble removal function according to claim 9, wherein: when the liquid level in the cavity (1) is full and overflows through the exhaust valve (43) on the exhaust assembly (4), the exhaust valve (43) is closed, and the bubble removing operation of the filtering device is completed.