Coating slurry self-cleaning filtering device and slurry supply equipment

Abstract

The utility model relates to the technical field of coating slurry preparation, and discloses a coating slurry self-cleaning and filtering device and slurry feeding equipment, the coating slurry self-cleaning and filtering device comprises a shell which is provided with a feed port and a discharge port; the filtering part is arranged in the shell, a second containing cavity is formed in the filtering part, the first end of the second containing cavity is communicated with the feeding port, the second end of the second containing cavity is communicated with the discharging port, and a first containing cavity is formed between the filtering part and the shell; the conversion piece is arranged in the shell and located at the end, far away from the feeding port, of the filtering piece, a cleaning channel communicated with the first containing cavity is formed in the conversion piece, and a liquid injection port communicated with the cleaning channel is formed in the shell. The filter solves the problems that time and labor are consumed when the filtering piece is replaced, and production efficiency is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of coating slurry preparation, in particular to a self-cleaning filtering device for coating slurry and a slurry feeding device. Background Art

[0002] In the process of battery electrode sheet production, it is necessary to coat the slurry on the foil to make the foil meet the performance requirements of the electrode sheet. In the process of slurry preparation, due to factors such as preparation process, particles and impurities may appear in the slurry. If these particles and impurities are directly coated on the electrode sheet, it will affect the electrode sheet and may cause scratches, base exposure, material accumulation, and even foil fracture, seriously affecting the product quality. Therefore, before the slurry is coated on the foil, it needs to go through a filtering process to remove the particles and impurities in the slurry to ensure the product quality. During the use of the filter element of the filtering device, the particles and impurities in the slurry will accumulate in the filtering device. Coupled with the certain consistency of the slurry, with the accumulation of impurities and particles, it will cause the blockage of the filtering structure, increase the pressure at the filtering structure, and pose a safety hazard.

[0003] In the prior art, in order to avoid the situation that the filtering device is blocked and the pressure rises due to the accumulation of impurities, the filter element is usually replaced regularly to keep the filtering liquid path unobstructed and avoid blockage.

[0004] However, replacing the filter element is time-consuming and laborious. At the same time, since the filtering device cannot work during replacement, the production efficiency will be reduced. Summary of the Utility Model

[0005] In view of this, the utility model provides a self-cleaning filtering device for coating slurry and a slurry feeding device to solve the problems that replacing the filter element is time-consuming and laborious and affects the production efficiency.

[0006] In a first aspect, the utility model provides a self-cleaning filtering device for coating slurry, including: a housing provided with a feed inlet and a discharge outlet; a filter element disposed in the housing, a second accommodation cavity is provided in the filter element, a first end of the second accommodation cavity is communicated with the feed inlet, a second end is communicated with the discharge outlet, and a first accommodation cavity is formed between the filter element and the housing; a conversion member disposed in the housing and located at an end of the filter element away from the feed inlet, a cleaning channel communicated with the first accommodation cavity is provided on the conversion member, and a liquid injection port communicated with the cleaning channel is provided on the housing.

[0007] Beneficial effects: Setting the housing provides a structural basis for other components of the filtering device. The filtering element is disposed within the housing and is provided with a second accommodation chamber. The slurry enters the first accommodation chamber from the feed port, passes through the sidewall of the filtering element for filtration, and then enters the second accommodation chamber, and finally is discharged from the second accommodation chamber through the discharge port, realizing the filtration of the slurry. By providing a conversion member and connecting the conversion member to the first accommodation chamber, during cleaning, the cleaning agent enters the first accommodation chamber from the liquid injection port via the cleaning channel under high pressure and is discharged from the feed port, thereby flushing the impurities and particles on the inner wall of the housing and the outer wall of the filtering element, eliminating or reducing the attachment of larger impurities and particles. Subsequently, the cleaning liquid enters from the feed port, passes through the first accommodation chamber and enters the second accommodation chamber, and finally is discharged from the discharge port, thereby flushing the smaller impurities and particles attached to the inner side of the filtering element and discharging the impurities. Through two flushes, larger particles and impurities on the outer side of the filtering element and smaller particles and impurities on the inner side of the filtering element can be removed, thereby thoroughly cleaning the filtering element, greatly reducing the replacement frequency of the filter element, saving time and labor, and improving production efficiency.

[0008] In an alternative embodiment, the circumferential side of the conversion member has a groove, and a gap between the bottom of the groove and the inner wall of the housing forms the cleaning channel.

[0009] Beneficial effects: By forming a groove on the circumferential side of the conversion member in cooperation with the inner wall of the housing, when the cleaning liquid is injected into the liquid inlet, the cleaning liquid flows along the circumferential side of the conversion member and is in direct contact with the inner wall of the housing. After the cleaning liquid enters the first chamber, it preferentially flushes the inner wall of the housing, and can remove the impurities and particles that are firmly attached to the inner wall of the housing. Subsequently, the impurities and particles on the filtering element are cleaned, realizing a comprehensive cleaning of the external structure of the filtering element.

[0010] In an alternative embodiment, a plurality of protrusions are provided on the circumferential side of the conversion member, and the protrusions are snap-fitted with the inner wall of the housing. Along the direction of the circumferential edge contour of the conversion member, a groove is formed between adjacent protrusions.

[0011] Beneficial effects: By providing protrusions to be snap-fitted with the housing, the installation of the conversion member and the housing is realized. At the same time, the protrusions can naturally form a groove on the circumferential side of the conversion member, enabling two parts of the same structure to realize different functions respectively, and improving the practicality of the structure.

[0012] In an alternative embodiment, the length of the groove along the extending direction of the circumferential edge of the conversion member is greater than the distance between the bottom of the groove and the inner wall of the housing.

[0013] Beneficial effects: Since the length of the groove extending along the circumferential edge of the conversion member is greater than the distance between the groove bottom and the inner wall, the cleaning channel is in a narrow and long opening shape, and the cleaning liquid clings more closely to the inner wall of the housing when passing through the cleaning channel. At the same time, under the action of the slit, the flow rate of the cleaning liquid can be increased, improving the flushing effect on the firmly attached substances on the inner wall of the housing.

[0014] In an alternative embodiment, a plurality of the grooves are provided, and the plurality of grooves are evenly spaced along the circumferential side of the conversion member.

[0015] Beneficial effects: By evenly spacing the grooves along the circumferential side of the conversion member, the cleaning liquid flows evenly to all parts of the inner wall of the housing, making the cleaning range more comprehensive.

[0016] In an alternative embodiment, a flow channel is provided at one end of the conversion member facing the liquid injection port. The flow channel is located inside the conversion member and extends radially along the conversion member. A communication hole extending axially is formed in the conversion member. The communication hole connects the first end of the flow channel with the liquid injection port, and the second end of the flow channel is connected to the cleaning channel.

[0017] Beneficial effects: Through the setting of the flow channel, the cleaning liquid input from the liquid injection port is guided to the cleaning channel, thus realizing the connection between the liquid injection port and the cleaning channel. Moreover, the connection position and the form of the liquid injection port are not restricted by the actual position and shape of the cleaning channel, improving the flexibility of the structural setting.

[0018] In an alternative embodiment, a plurality of the cleaning channels are provided, and the plurality of cleaning channels are evenly spaced along the circumferential side of the conversion member. The number of the flow channels matches the number of the cleaning channels and is respectively connected to the corresponding cleaning channels.

[0019] Beneficial effects: By providing a plurality of cleaning channels and evenly spacing the cleaning channels along the circumferential side of the conversion member, the cleaning liquid injected from the liquid injection port can evenly flush the inner wall of the housing. By setting the number of the flow channels to match the number of the cleaning channels and respectively connecting them to the corresponding cleaning channels, after injecting the cleaning liquid into the liquid injection port, the plurality of flow channels distribute and guide the cleaning liquid, thereby guiding the cleaning liquid to the positions of each cleaning channel respectively.

[0020] In a second aspect, the present invention further provides a slurry feeding device, including: a slurry conveying unit for conveying slurry; a cleaning agent conveying unit for conveying a cleaning agent; the above-mentioned coating slurry self-cleaning and filtering device. The slurry conveying unit is connected to the feed port through a pipeline, and the cleaning agent conveying unit is connected to the feed port and the liquid injection port respectively through pipelines.

[0021] Beneficial effects: By adopting the above-mentioned self-cleaning filtration device for coating slurry in the slurry feeding device, during the process of feeding slurry, the self-cleaning filtration device for coating slurry filters the slurry, removes particles and impurities in the slurry, and during use, by inputting cleaning liquid into the device, the filter elements in the device can be cleaned without stopping the machine to replace the filter elements, effectively saving manpower and time and improving production efficiency.

[0022] In an alternative embodiment, a reversing valve is provided at the feed inlet.

[0023] Beneficial effects: By providing a reversing valve at the feed inlet, during normal processing, the unfiltered slurry is transported to the feed inlet through a pipeline. During the cleaning process, the reversing valve changes direction, and the cleaning liquid is transported or discharged from the feed inlet through a pipeline different from the slurry transportation, avoiding the situation where the cleaning liquid is mixed with the slurry during transportation and remains in the pipeline, affecting the quality of the slurry.

[0024] In an alternative embodiment, a control valve is provided at the liquid injection port, and the control valve is used to control the opening and closing of the liquid injection port.

[0025] Beneficial effects: By providing a control valve, the liquid injection port is closed during the normal filtration process of the device, and the liquid injection port is opened and cleaning liquid is injected during cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of a self-cleaning filtration device for coating slurry according to an embodiment of the present invention;

[0028] Figure 2 It is Figure 1 a schematic cross-sectional structure diagram at A-A in

[0029] Figure 3 It is Figure 1 a schematic cross-sectional structure diagram at B-B in

[0030] Figure 4 It is Figure 1 a schematic cross-sectional structure diagram at C-C in

[0031] Explanation of the reference numerals in the drawings:

[0032] 100, housing; 101, feed inlet; 102, discharge outlet; 103, first accommodation chamber; 104, liquid injection port; 200, filter element; 201, second accommodation chamber; 300, conversion element; 301, cleaning channel; 302, protrusion; 303, flow channel; 304, communication hole; 400, control valve. Detailed implementation manners

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] The following combines Figures 1 to 4 , to describe the embodiments of the present utility model.

[0035] According to an embodiment of the present utility model, on the one hand, please refer to Figures 1 to 3 , a self-cleaning filtration device for coating slurry is provided, including a housing 100, provided with a feed inlet 101 and a discharge outlet 102; a filter element 200, disposed inside the housing 100, a second accommodation chamber 201 is provided inside the filter element 200, the first end of the second accommodation chamber 201 communicates with the feed inlet 101, the second end communicates with the discharge outlet 102, and a first accommodation chamber 103 is provided between the filter element 200 and the housing 100; a conversion element 300, disposed inside the housing 100 and located at one end of the filter element 200 away from the feed inlet 101, a cleaning channel 301 communicating with the first accommodation chamber 103 is provided on the conversion element 300, and a liquid injection port 104 communicating with the cleaning channel 301 is provided on the housing 100.

[0036] In this embodiment, the housing 100 provides a structural basis for other components of the filtering device. The filter element 200 is disposed within the housing 100 and is provided with a second accommodation chamber 201. The slurry enters the first accommodation chamber 103 from the feed port 101, passes through the side wall of the filter element 200 for filtration, then enters the second accommodation chamber 201, and finally is discharged from the second accommodation chamber 201 through the discharge port 102, thereby realizing the filtration of the slurry. By providing the conversion member 300 and connecting the conversion member 300 to the first accommodation chamber 103, during cleaning, the cleaning agent enters the first accommodation chamber 103 from the liquid injection port 104 via the cleaning channel 301 under high pressure and is discharged from the feed port 101, thereby flushing the impurities and particles on the inner wall of the housing 100 and the outer wall of the filter element 200, eliminating or reducing the adhesion of larger impurities and particles. Subsequently, the cleaning liquid enters from the feed port 101, passes through the first accommodation chamber 103 into the second accommodation chamber 201, and finally is discharged from the discharge port 102, thereby flushing the smaller impurities and particles adhering to the inner side of the filter element 200 and discharging the impurities. Through two flushes, larger particles and impurities on the outer side of the filter element 200 and smaller particles and impurities on the inner side of the filter element 200 can be removed, thereby thoroughly cleaning the filter element 200, greatly reducing the replacement frequency of the filter element, saving time and labor, and improving production efficiency at the same time.

[0037] In the above embodiment, no specific form of the filter element 200 is restricted. The filter element 200 can be a filter screen, filter paper, filter cloth, etc. that are set in the shape of a container to have the second accommodation chamber 201, or other forms of composite filter structures, as long as it can filter the slurry and has the second accommodation chamber 201. The above embodiment selects a conical filter screen as the filter element 200.

[0038] In addition, in the above embodiment, specifically, the conversion member 300 is disposed at one end of the filter element 200 away from the feed port 101 and separates the filter element 200 from the liquid injection port 104. The above embodiment does not limit the specific forms of the conversion member 300 and the cleaning channel 301. The conversion member 300 matches the shape of the housing 100. The cleaning channel 301 can be located on the periphery of the conversion member 300, or can be disposed on the conversion member 300 and penetrate through the conversion member 300. The fluid channel can be a groove structure opened on the conversion member 300, or a pipe fitting penetrating through the conversion member 300.

[0039] In the above embodiment, it should be noted that the conversion member 300 can be connected to the housing 100 by snap connection. In some embodiments not shown, it can also be fixedly disposed within the housing 100 by welding with a connecting column. The filter element 200 can be connected to the conversion member 300 to be fixedly disposed within the housing 100, or can be indirectly fixed to the inner wall of the housing 100 through auxiliary structures such as connecting columns and thus be fixed within the housing 100.

[0040] In one embodiment, a groove is formed on the periphery of the conversion member 300 , and a gap between the bottom of the groove and the inner wall of the housing 100 forms a cleaning channel 301 .

[0041] Specifically, this embodiment does not limit the specific shape of the groove, and the groove may be a circular groove, a square groove, or a shape matching the peripheral profile of the conversion member 300 .

[0042] In this embodiment, a groove is formed by the groove arranged on the side of the conversion member 300 and the inner wall of the shell 100. When the cleaning liquid is injected into the liquid inlet, the cleaning liquid flows along the side of the conversion member 300 and directly contacts the inner wall of the shell 100. After the cleaning liquid enters the first chamber, the inner wall of the shell 100 is flushed first, and impurities and particles that are firmly attached to the inner wall of the shell 100 can be removed, and then the impurities and particles on the filter element 200 are cleaned, thereby achieving all-round cleaning of the external structure of the filter element 200.

[0043] In one embodiment, a plurality of protrusions 302 are disposed on the peripheral side of the conversion member 300 , and the protrusions 302 are engaged with the inner wall of the housing 100 , and grooves are formed between adjacent protrusions 302 along the direction of the peripheral edge contour of the conversion member 300 .

[0044] In this embodiment, the conversion member 300 is installed on the shell 100 by setting the protrusion 302 to engage with the shell 100. At the same time, the protrusion 302 can naturally form a groove around the conversion member 300, so that the two parts of the same structure can respectively realize different functions, thereby improving the practicality of the structure.

[0045] In one embodiment, the length of the groove along the extending direction of the peripheral edge of the conversion member 300 is greater than the distance between the bottom of the groove and the inner wall of the housing 100 .

[0046] In this embodiment, since the length of the groove extending along the peripheral edge of the conversion member 300 is greater than the distance between the bottom of the groove and the inner wall, the cleaning channel 301 is a narrow and long opening type. When the cleaning liquid passes through the cleaning channel 301, it is closer to the inner wall of the shell 100. At the same time, under the action of the slit, the flow rate of the cleaning liquid can be increased, thereby improving the flushing effect of the firmly attached objects on the inner wall of the shell 100.

[0047] In one embodiment, a plurality of grooves are provided, and the plurality of grooves are evenly spaced apart along the circumference of the conversion member 300 .

[0048] In this embodiment, grooves are evenly spaced around the circumference of the conversion member 300 so that the cleaning liquid can flow evenly to all parts of the inner wall of the housing 100, thereby making the cleaning range more comprehensive.

[0049] In one embodiment, one end of the conversion member 300 facing the liquid injection port 104 is provided with a flow channel 303. The flow channel 303 is located inside the conversion member 300 and extends along the radial direction of the conversion member 300. A communication hole 304 extending along the axial direction is formed in the conversion member 300. The communication hole 304 communicates the first end of the flow channel 303 with the liquid injection port 104, and the second end of the flow channel 303 is communicated with the cleaning channel 301.

[0050] In this embodiment, through the arrangement of the flow channel 303, the cleaning liquid input from the liquid injection port 104 is guided to the cleaning channel 301, thereby realizing the communication between the liquid injection port 104 and the cleaning channel 301. Moreover, the communication position and the form of the liquid injection port 104 are not restricted by the actual position and shape of the cleaning channel 301, which improves the flexibility of the structural arrangement.

[0051] In one embodiment, there are multiple cleaning channels 301. The multiple cleaning channels 301 are evenly spaced along the circumferential side of the conversion member 300. The number of the flow channels 303 matches the number of the cleaning channels 301 and is respectively communicated with the corresponding cleaning channels 301.

[0052] In this embodiment, by providing multiple cleaning channels 301 and making the cleaning channels 301 evenly spaced along the circumferential side of the conversion member 300, the cleaning liquid injected from the liquid injection port 104 can evenly wash the inner wall of the housing 100. By setting the number of the flow channels 303 to match the number of the cleaning channels 301 and respectively communicating with the corresponding cleaning channels 301, after injecting the cleaning liquid into the liquid injection port 104, the multiple flow channels 303 distribute and guide the cleaning liquid, thereby guiding the cleaning liquid to the positions of the respective cleaning channels 301.

[0053] According to an embodiment of the present invention, on the other hand, a slurry feeding device is further provided, including: a slurry conveying unit for conveying slurry; a cleaning agent conveying unit for conveying a cleaning agent; the above-mentioned coating slurry self-cleaning and filtering device. The slurry conveying unit is communicated with the feeding port 101 through a pipeline, and the cleaning agent conveying unit is communicated with the feeding port 101 and the liquid injection port 104 respectively through pipelines.

[0054] In this embodiment, by adopting the above-mentioned coating slurry self-cleaning and filtering device in the slurry feeding device, during the slurry feeding process, the coating slurry self-cleaning and filtering device filters the slurry to remove particles and impurities in the slurry. And during use, by inputting the cleaning liquid into the device, the filter element 200 in the device can be cleaned without stopping the machine to replace the filter element 200, effectively saving manpower and time and improving production efficiency.

[0055] In one embodiment, a reversing valve (not shown in the figure) is provided at the feeding port 101.

[0056] In this embodiment, by providing a reversing valve at the feed inlet 101, during normal processing, the unfiltered slurry is transported to the feed inlet 101 through a pipeline. During the cleaning process, the reversing valve changes direction, and the cleaning liquid is transported or discharged from the feed inlet 101 through a pipeline different from the slurry transportation pipeline, avoiding the situation where the cleaning liquid is mixed with the slurry and the meal material is in the pipeline, which affects the quality of the slurry.

[0057] In one embodiment, a control valve 400 is provided at the liquid injection port 104, and the control valve 400 is used to control the opening and closing of the liquid injection port 104.

[0058] Specifically, the control valve 400 can be a ball valve. In some embodiments not shown, it can also be other types of valves as long as it can achieve the opening and closing control of the liquid injection port 104.

[0059] In this embodiment, by providing the control valve 400, the liquid injection port 104 is closed during the normal filtration process of the device, and the liquid injection port 104 is opened and the cleaning liquid is injected during cleaning.

[0060] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A coating slurry self-cleaning filtering device, characterized in that: include: The housing (100) is provided with a feed inlet (101) and a discharge outlet (102); A filter element (200) is arranged in the housing (100), a second accommodating chamber (201) is arranged in the filter element (200), a first end of the second accommodating chamber (201) is communicated with the feed port (101), and a second end of the second accommodating chamber (201) is communicated with the discharge port (102), and a first accommodating chamber (103) is provided between the filter element (200) and the housing (100); A conversion member (300) is disposed in the housing (100) and is located at an end of the filter element (200) away from the feed port (101); the conversion member (300) is provided with a cleaning channel (301) connected to the first accommodating chamber (103); and the housing (100) is provided with a liquid injection port (104) connected to the cleaning channel (301).

2. The coating slurry self-cleaning filtering device according to claim 1, characterized in that: The conversion member (300) has a groove on its circumferential side, and the gap between the bottom of the groove and the inner wall of the housing (100) forms the cleaning channel (301).

3. The coating slurry self-cleaning filtering device according to claim 2, characterized in that: The conversion member (300) is provided with a plurality of protrusions (302) on its circumferential side, the protrusions (302) being snap-fitted with the inner wall of the shell (100), and the grooves are formed between adjacent protrusions (302) along the direction of the circumferential edge contour of the conversion member (300).

4. The coating slurry self-cleaning filtering device according to claim 2, characterized in that: The length of the groove along the extension direction of the peripheral edge of the conversion member (300) is greater than the distance between the bottom of the groove and the inner wall of the housing (100).

5. The coating slurry self-cleaning filtering device according to any one of claims 2 to 4, characterized in that: A plurality of the grooves are provided, and the plurality of the grooves are evenly spaced and distributed along the circumference of the conversion member (300).

6. The coating slurry self-cleaning filtering device according to claim 1, characterized in that: A flow channel (303) is provided at one end of the conversion member (300) facing the liquid injection port (104); the flow channel (303) is located inside the conversion member (300) and extends radially along the conversion member (300); a connecting hole (304) extending in the axial direction is provided on the conversion member (300); the connecting hole (304) connects the first end of the flow channel (303) with the liquid injection port (104); and the second end of the flow channel (303) is connected with the cleaning channel (301).

7. The coating slurry self-cleaning filtering device according to claim 6, characterized in that: A plurality of cleaning channels (301) are provided, and the plurality of cleaning channels (301) are evenly spaced and distributed along the circumference of the conversion member (300). The number of the flow channels (303) matches the number of the cleaning channels (301), and are respectively connected to the corresponding cleaning channels (301).

8. A slurry feeding device, characterized in that: include: A slurry conveying unit, used for conveying slurry; A cleaning agent delivery unit, used for delivering cleaning agent; The coating slurry self-cleaning filtering device according to any one of claims 1 to 7, wherein the slurry conveying unit is connected to the feed port (101) through a pipeline, and the cleaning agent conveying unit is respectively connected to the feed port (101) and the injection port (104) through pipelines.

9. The slurry feeding device according to claim 8, characterized in that: A reversing valve is provided at the feed inlet (101).

10. The slurry feeding device according to claim 8, characterized in that: A control valve (400) is provided at the liquid injection port (104), and the control valve (400) is used to control the opening and closing of the liquid injection port (104).

Images