Contact type vacuum defoaming machine

Abstract

The utility model provides a contact type vacuum defoaming machine which comprises a vacuum tank, and the vacuum tank is provided with a feeding port, a discharging port and a vacuum negative pressure connector. The inner space of the vacuum tank comprises a first cavity and a second cavity, the feeding port is located in the first cavity, the discharging port is located in the second cavity, a driving extrusion device is arranged in the first cavity and used for rolling and extruding slurry in the first cavity, and the driving extrusion device is used for rolling and extruding the slurry in the second cavity. Separating bubbles in the slurry and discharging the bubbles from the vacuum negative pressure interface; a gap for slurry to flow through is formed between the side, away from the feeding port, of the joint of the first cavity and the second cavity and the side wall of the adjacent vacuum tank, and the slurry rolled and extruded in the first cavity flows into the second cavity along the side wall of the vacuum tank through the gap. According to the utility model, the slurry is rolled and extruded so as to separate bubbles in the slurry.

Description

Technical Field

[0001] The utility model relates to the technical field of slurry treatment, in particular to a contact type vacuum degassing machine. Background Art

[0002] With the development of the new energy industry, commercial vehicle lithium batteries, energy storage lithium batteries, etc. have increasingly higher requirements for battery safety performance. Correspondingly, the requirements for the processing accuracy of the electrode during the battery production process are also more stringent. Among them, agglomerates will be generated during the slurry mixing process. Although the slurry has been dispersed, crushed, and filtered, there will be very small agglomerations or agglomerations. The agglomerated slurry will lead to a reduced filter element life during the filtration process, and there is a risk of scraping the substrate or scratching the coating surface when the slurry is extruded and coated by the coating head, which in turn affects the quality of the electrode. Therefore, the product defective rate caused by the appearance of bubbles is a pain point in this industry.

[0003] In the prior art, a degassing machine is typically used to remove bubbles from the slurry and prevent cracking of the electrode coating surface during the coating drying process. Currently, commonly used degassing equipment uses centrifugal force to slam the slurry into a vacuum tank, achieving vacuum degassing. However, due to the high viscosity of battery slurry, agglomerated bubbles cannot be effectively removed. Consequently, the slurry is forced to be thinned during electrode coating, and the bubbles in the slurry burst, forming pits on the electrode, reducing product yield. Utility Model Content

[0004] Based on this, it is necessary to provide a contact vacuum degassing machine to address the above technical problems.

[0005] A contact vacuum degassing machine comprises a vacuum tank, which is provided with a feed port, a discharge port and a vacuum negative pressure interface. The slurry enters the vacuum tank through the feed port and is discharged from the discharge port, and the vacuum negative pressure interface is used to connect with a vacuum pump; the internal space of the vacuum tank comprises a first chamber and a second chamber, the feed port is located in the first chamber, and the discharge port is located in the second chamber. A driving extrusion device is provided in the first chamber, and the driving extrusion device is used to roll and extrude the slurry located in the first chamber, separate the bubbles in the slurry and discharge it from the vacuum negative pressure interface; a gap for the slurry to flow through is formed at the connection between the first chamber and the second chamber between the side away from the feed port and the adjacent side wall of the vacuum tank, and the slurry after rolling and extrusion in the first chamber flows into the second chamber through the gap and along the side wall of the vacuum tank.

[0006] In one embodiment, the driving extrusion device includes a driving assembly, a transmission shaft and an extrusion roller, the first end of the transmission shaft is connected to the extrusion roller, the second end of the transmission shaft is connected to the driving assembly, and the second end of the transmission shaft is fixed to the side wall of the vacuum tank. The extrusion roller rotates around the second end of the transmission shaft under the drive of the driving assembly to roll and extrude the slurry in the first chamber.

[0007] In one embodiment, the squeezing range of the squeezing roller covers the surface of the slurry flowing in the first chamber.

[0008] In one embodiment, there are multiple squeezing rollers, and the squeezing ranges of the multiple squeezing rollers partially or completely overlap, so as to repeatedly roll and squeeze the slurry in the first chamber.

[0009] In one embodiment, the first chamber and the second chamber are arranged along the height direction of the vacuum tank, and the slurry in the first chamber flows into the second chamber under the action of gravity.

[0010] In one embodiment, the internal space of the vacuum tank is divided into a first chamber and a second chamber by a partition plate, and the first side of the partition plate close to the feed port and the second side and the third side adjacent to the first side are respectively abutted against the adjacent side walls of the vacuum tank body, and the gap is located between the fourth side of the partition plate away from the feed port and the adjacent side wall of the vacuum tank.

[0011] In one embodiment, the partition plate is inclined from one end close to the feed port to the other end away from the feed port toward the lower surface of the second chamber, and the slurry after rolling and extrusion in the first chamber flows along the inclined direction of the partition plate under the action of gravity.

[0012] In one embodiment, the inclination angle formed between the partition plate and the horizontal plane is in the range of 5°-20°.

[0013] In one embodiment, the partition plate is fixed with fluid partition strips on opposite sides along a direction perpendicular to the slurry flow direction, and a flow area for the slurry to flow is formed between the fluid partition strips on both sides. The slurry flowing in through the feed port flows in the flow area, and the driving extrusion device is located in the flow area.

[0014] In one embodiment, the bottom of the vacuum tank is a cone structure, and the discharge port is located at the end of the cone.

[0015] The above-mentioned contact vacuum degassing machine is used to roll and squeeze the slurry in the first chamber through a driving extrusion device arranged in the vacuum tank to separate the bubbles in the slurry. The slurry after rolling and extrusion flows into the second chamber under the action of gravity to achieve the purpose of slurry degassing and improve the quality of the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of a contact vacuum degassing machine in one embodiment;

[0017] Figure 2 is a cross-sectional view of a contact vacuum degassing machine in one embodiment;

[0018] Figure 3 1 is a perspective view of a contact vacuum degassing machine in one embodiment.

[0019] Description of labels:

[0020] 10-contact vacuum degassing machine; 101-feeding port; 102-discharging port; 103-vacuum negative pressure interface; 104-gap; 110-vacuum tank; 111-first chamber; 112-second chamber; 120-driving extrusion device; 121-transmission shaft; 122-extrusion roller; 123-connecting shaft; 130-partition plate; 131-fluid separation strip. DETAILED DESCRIPTION

[0021] To facilitate understanding of this application and to make the above-mentioned objectives, features, and advantages of this application more readily apparent, the following detailed description of specific embodiments of this application is provided in conjunction with the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of this application, and the accompanying drawings illustrate preferred embodiments of this application. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of this application. This application can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of this application. Therefore, this application is not limited to the specific embodiments disclosed below. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance or to implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout this description, "a plurality" means at least two, such as two or three, unless otherwise specifically defined. Throughout this description, "several" means at least one, such as one or two, unless otherwise specifically defined. It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may also be an element centered thereon. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing specific implementation methods only and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items.

[0022] Example 1

[0023] In this embodiment, Figures 1 to 3As shown, a contact vacuum degassing machine 10 is provided, comprising a vacuum tank 110, wherein the vacuum tank 110 is provided with a feed port 101, a discharge port 102 and a vacuum negative pressure interface 103, the slurry enters the vacuum tank 110 through the feed port 101 and is discharged from the discharge port 102, the vacuum negative pressure interface 103 is used to connect with a vacuum pumping device (not shown in the figure); the internal space of the vacuum tank 110 comprises a first chamber 111 and a second chamber 112, the feed port 101 is located in the first chamber 111, the discharge port 102 is located in the second chamber 112, the first chamber 111 is provided with a feed port 101, the discharge port 102 is located in the second chamber 112, and ... A driving extrusion device 120 is provided in a chamber 111, and the driving extrusion device 120 is used to roll and extrude the slurry located in the first chamber 111, separate the bubbles in the slurry and discharge them from the vacuum negative pressure interface 103; a gap 104 for the slurry to flow is formed at the connection between the first chamber 111 and the second chamber 112 between the side away from the feed port 101 and the adjacent side wall of the vacuum tank 110, and the slurry after rolling and extrusion in the first chamber 111 flows into the second chamber 112 through the gap 104 and along the side wall of the vacuum tank 110.

[0024] In this embodiment, a driving extrusion device 120 provided in the first chamber 111 of the vacuum tank 110 is used to roll and extrude the slurry to eliminate bubbles in the slurry, thereby achieving the purpose of improving the quality of the slurry. In addition, in order to avoid the re-generation of bubbles due to collision during the conveying and discharging process of the slurry after rolling and extrusion, a second chamber 112 is provided, the discharge port 102 is located in the second chamber 112, and a gap 104 for the slurry to flow through is formed at the connection between the first chamber 111 and the second chamber 112 on the side away from the feed port 101 and the adjacent side wall of the vacuum tank 110. The slurry flows into the second chamber 112 through the gap 104 and along the side wall of the vacuum tank 110, ensuring that the slurry flows out smoothly and reducing bubbles generated by the inertial impact of the slurry fluid.

[0025] In this embodiment, the vacuum tank 110 is connected to the vacuum extraction device through the vacuum negative pressure interface 103 to ensure that the vacuum tank 110 is maintained in a vacuum state, and the bubbles separated in the slurry can be discharged from the vacuum negative pressure interface to the outside of the vacuum tank 110, thereby achieving the purpose of degassing.

[0026] In one embodiment, see Figure 2 and Figure 3As shown, the driving extrusion device 120 includes a driving assembly (not shown in the figure), a transmission shaft 121 and an extrusion roller 122. The first end of the transmission shaft 121 is connected to the extrusion roller 122, the second end of the transmission shaft 121 is connected to the driving assembly, and the second end of the transmission shaft 121 is fixed to the side wall of the vacuum tank 110. The extrusion roller 122 rotates around the second end of the transmission shaft 121 under the drive of the driving assembly to roll and extrude the slurry in the first chamber 111.

[0027] In this embodiment, the driving and squeezing device 120 adopts a squeezing roller structure to achieve rolling squeezing of the slurry in the first chamber 111 to separate bubbles in the slurry.

[0028] In one embodiment, the material of the squeezing roller 122 is steel, that is, the squeezing roller 122 is a steel roller. The weight of the steel roller itself facilitates the separation of bubbles in the slurry during the squeezing process of the slurry.

[0029] In one embodiment, the drive assembly is a servo motor or a pneumatic cylinder, which is fixedly mounted on the outside of the vacuum tank 110. The vacuum tank 110 has a mounting hole, and the second end of the drive shaft 121, which is connected to the drive assembly, is inserted into the mounting hole and connected to the drive assembly. To ensure the sealing of the vacuum tank 110, the connection between the drive shaft 121 and the drive assembly is sealed with a vacuum sealing ring, thereby maintaining a vacuum negative pressure environment within the vacuum tank 110.

[0030] In one embodiment, the squeezing range of the squeezing roller 122 covers the surface of the slurry flowing in the first chamber.

[0031] In this embodiment, in order to ensure full coverage and squeezing of the slurry in the first chamber 111 , the squeezing range of the squeezing roller 122 covers the surface of the slurry flowing in the first chamber 111 .

[0032] In one embodiment, the length of the squeezing roller 122 is equal to the length distance of the surface of the first chamber 111 for the slurry to flow, and the rolling range of the squeezing roller 122 is equal to the width distance of the surface of the first chamber 111 for the slurry to flow, so that the squeezing range of the squeezing roller 122 covers the lower surface of the first chamber 111.

[0033] In one embodiment, the length of the squeezing roller 122 is equal to the width of the surface of the first chamber 111 for the slurry to flow, and the rolling range of the squeezing roller 122 is equal to the length of the surface of the first chamber 111 for the slurry to flow, so that the squeezing range of the squeezing roller 122 covers the surface of the slurry flowing in the first chamber.

[0034] In one embodiment, there are multiple squeezing rollers 122 , and the squeezing ranges of the multiple squeezing rollers 122 partially or completely overlap, so as to repeatedly roll and squeeze the slurry in the first chamber 111 .

[0035] In this embodiment, in order to ensure that the bubbles in the slurry are completely separated, a plurality of squeezing rollers 122 are provided, and the squeezing ranges of the plurality of squeezing rollers 122 partially or completely overlap, so as to achieve repeated rolling squeezing of the slurry in the first chamber 111.

[0036] In one embodiment, continue to refer to Figure 2 and Figure 3 As shown, the number of squeezing rollers 122 is set to two, and the two squeezing rollers 122 are arranged in front and behind on the flow path of the slurry in the first chamber 111, that is, the first squeezing roller 122 is located on the side of the first chamber 111 close to the feed port 101, and the second squeezing roller 122 is located on the side of the first chamber 111 away from the feed port 101. In this way, the slurry entering the first chamber 111 from the feed port 101 first passes through the first squeezing roller 122, and after being squeezed by the first squeezing roller 122, it flows to the second squeezing roller 122 and is squeezed by the second squeezing roller 122, thereby realizing repeated rolling squeezing of the slurry.

[0037] In one embodiment, the plurality of squeezing rollers 122 are driven to roll by the same drive assembly.

[0038] In this embodiment, the number of the squeezing rollers 122 is set to two as an example for description. Figure 2 and Figure 3 As shown, each squeezing roller 122 is connected to the first end of the transmission shaft 121 through a connecting shaft 123, and the second end of the transmission shaft 121 is connected to the driving assembly, so that the same driving assembly drives the transmission shaft 121 to swing, and then drives the two squeezing rollers 122 to roll through the connecting shaft 123.

[0039] In one embodiment, the first chamber 111 and the second chamber 112 are arranged along the height direction of the vacuum tank 110 , and the slurry in the first chamber 111 flows into the second chamber 112 under the action of gravity.

[0040] In this embodiment, the first chamber 111 and the second chamber 112 are arranged along the height direction of the vacuum tank 110, so that the slurry in the first chamber 111 can flow into the second chamber 112 under the action of gravity after being squeezed by the driving extrusion device 120, and be discharged from the discharge port 102.

[0041] In other embodiments, the first chamber 111 and the second chamber 112 may be arranged along the length direction of the vacuum tank 110 , and a conveying mechanism is provided between the first chamber 111 and the second chamber 112 to convey the slurry from the first chamber 111 to the second chamber 112 .

[0042] In one embodiment, continue to refer to Figure 2 and Figure 3 As shown, the internal space of the vacuum tank 110 is divided into a first chamber 111 and a second chamber 112 by a partition plate 130. The first side of the partition plate 130 close to the feed port 101 and the second side and the third side adjacent to the first side are respectively abutted against the adjacent side walls of the vacuum tank 110. The gap 104 is located between the fourth side of the partition plate 130 away from the feed port 101 and the adjacent side wall of the vacuum tank 110.

[0043] In one embodiment, the partition plate 130 is inclined from one end close to the feed port 101 to the other end away from the feed port 101 toward the lower surface of the second chamber 112, and the slurry after rolling and extrusion in the first chamber 111 flows along the inclined direction of the partition plate 130 under the action of gravity.

[0044] In this embodiment, the partition plate 130 gradually tilts downward from one end close to the feed port 101 to the other end away from the feed port 101, so that the slurry in the first chamber 111 flows along the tilted direction of the partition plate 130 under the action of gravity, ensuring the stability of the slurry flow and reducing bubbles generated by the inertial impact of the slurry fluid.

[0045] In one embodiment, the inclination angle formed between the partition plate 130 and the horizontal plane ranges from 5° to 20°.

[0046] In this embodiment, the inclination angle formed between the partition plate 130 and the horizontal plane ranges from 5° to 20°, which facilitates the slurry to flow from the feed port 101 to the discharge port 102 .

[0047] In one embodiment, continue to refer to Figure 2 and Figure 3 As shown, the partition plate 130 is fixed with fluid partition strips 131 on opposite sides along a direction perpendicular to the slurry flow direction, and a flow area for the slurry to flow is formed between the fluid partition strips 131 on both sides. The slurry flowing in through the feed port 101 flows in the flow area, and the driving extrusion device 120 is located in the flow area.

[0048] In this embodiment, the fluid separation strips 131 set on the partition plate 130 are used to limit the area where the slurry flows, and the driving extrusion device 120 is located in the flow area. Specifically, the length of the extrusion roller 122 is equal to the distance between the fluid separation strips 131 on both sides to ensure that the extrusion roller 122 rolls and squeezes the slurry in the flow area.

[0049] In one embodiment, the bottom of the vacuum tank 110 is a cone structure, and the discharge port 102 is located at the end of the cone structure.

[0050] In this embodiment, the bottom of the vacuum tank 110 is a cone structure, and the discharge port 102 is located at the end of the cone structure to facilitate the discharge of the slurry.

[0051] In this embodiment, a driving extrusion device 120 is provided in the vacuum tank 110 to roll and extrude the slurry in the first chamber 111 to separate the bubbles in the slurry. The slurry after rolling and extrusion flows into the second chamber 112 under the action of gravity to achieve the purpose of degassing the slurry and improve the quality of the slurry.

[0052] The various technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. It should be noted that "in one embodiment", "for example", "for example", etc. in this application are intended to illustrate this application, rather than to limit this application. The above-mentioned embodiments only express several implementation methods of this application, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, without departing from the concept of this application, several variations and improvements can be made, which all fall within the scope of protection of this application. Therefore, the scope of protection of the patent application of this application shall be based on the attached claims.

Claims

1. A contact vacuum degassing machine, characterized in that: It includes a vacuum tank, which is provided with a feed port, a discharge port and a vacuum negative pressure interface. The slurry enters the vacuum tank through the feed port and is discharged from the discharge port. The vacuum negative pressure interface is used to connect with a vacuum pump; the internal space of the vacuum tank includes a first chamber and a second chamber, the feed port is located in the first chamber, and the discharge port is located in the second chamber. A driving extrusion device is provided in the first chamber, and the driving extrusion device is used to roll and extrude the slurry located in the first chamber, separate the bubbles in the slurry and discharge it from the vacuum negative pressure interface; a gap for the slurry to flow through is formed at the connection between the first chamber and the second chamber between the side away from the feed port and the adjacent side wall of the vacuum tank, and the slurry after rolling and extrusion in the first chamber flows into the second chamber through the gap and along the side wall of the vacuum tank.

2. The contact vacuum degassing machine according to claim 1, characterized in that The driven extrusion device includes a driving assembly, a transmission shaft and an extrusion roller. The first end of the transmission shaft is connected to the extrusion roller, the second end of the transmission shaft is connected to the driving assembly, and the second end of the transmission shaft is fixed to the side wall of the vacuum tank. The extrusion roller rotates around the second end of the transmission shaft under the drive of the driving assembly to roll and extrude the slurry in the first chamber.

3. The contact vacuum degassing machine according to claim 2, characterized in that: The squeezing range of the squeezing roller covers the surface of the slurry flowing in the first chamber.

4. The contact vacuum degassing machine according to claim 2, characterized in that There are multiple squeezing rollers, and the squeezing ranges of the multiple squeezing rollers partially or completely overlap, so as to repeatedly roll and extrude the slurry in the first chamber.

5. The contact vacuum degassing machine according to claim 1, characterized in that The first chamber and the second chamber are arranged along the height direction of the vacuum tank, and the slurry in the first chamber flows into the second chamber under the action of gravity.

6. The contact vacuum degassing machine according to claim 5, characterized in that: The internal space of the vacuum tank is divided into a first chamber and a second chamber by a partition plate. The first side of the partition plate close to the feed port and the second and third sides adjacent to the first side are respectively abutted against the adjacent side walls of the vacuum tank body. The gap is located between the fourth side of the partition plate away from the feed port and the adjacent side wall of the vacuum tank.

7. The contact type vacuum degassing machine according to claim 6, characterized in that: The partition plate is inclined from one end close to the feed port to the other end away from the feed port toward the lower surface of the second chamber, and the slurry after rolling and extrusion in the first chamber flows along the inclined direction of the partition plate under the action of gravity.

8. The contact vacuum degassing machine according to claim 7, characterized in that: The inclination angle formed between the partition plate and the horizontal plane ranges from 5° to 20°.

9. The contact vacuum degassing machine according to claim 6, characterized in that: The partition plate is fixed with fluid partition strips on opposite sides along a direction perpendicular to the slurry flow direction, and a flow area for the slurry to flow is formed between the fluid partition strips on both sides. The slurry flowing in through the feed port flows in the flow area, and the driving extrusion device is located in the flow area.

10. The contact type vacuum degassing machine according to claim 1, characterized in that: The bottom of the vacuum tank is in a cone structure, and the discharge port is located at the end of the cone.

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