Discharging structure and stirrer

Abstract

The utility model discloses a discharging structure and a blender, the discharging structure comprises a piston type discharging assembly, the bottom of a stirring inner cylinder is provided with a discharging port, and the piston type discharging assembly is communicated with the discharging port through a rotary joint. The piston type discharging assembly comprises a first discharging pipe, a second discharging pipe, a piston rod, a first piston and a driving part, the first discharging pipe is rotationally connected with the second discharging pipe, the first discharging pipe is arranged in the rotating joint and fixedly connected with the stirring inner barrel, the side wall of the second discharging pipe communicates with a third discharging pipe, and the third discharging pipe is arranged in the rotating joint and fixedly connected with the stirring inner barrel. The first piston is connected into the first discharging pipe and the second discharging pipe in a sliding mode, a rotating body is arranged between the first piston and the piston rod, and the first piston is rotationally connected with the piston rod through the rotating body; the stirrer comprises a stirring inner cylinder, an inner cylinder rotating assembly, a dispersing assembly, a scraper assembly and a discharging structure. According to the utility model, the slurry in the stirring inner cylinder can be automatically discharged, and the discharging efficiency of the battery slurry is improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery manufacturing, and particularly relates to a discharging structure and a mixer. Background Art

[0002] In the existing lithium battery manufacturing process, most are dry mixing processes and wet mixing processes, in which components such as active substances, conductive agents, dispersants, binders, and additives need to be added to a mixing main body in a certain proportion and sequence to form a stable fixed suspension.

[0003] After mixing, the battery slurry needs to be discharged. Since the mixing inner cylinder of the mixer also rotates, the existing discharging method is to scoop out the battery slurry from the mixing inner cylinder, and such working efficiency is extremely low; there is also a discharging valve arranged at the bottom of the mixing inner cylinder, and the discharging valve rotates together with the mixing inner cylinder. When discharging, a discharging pipe is manually connected, and although such working efficiency is improved to some extent, it still does not meet the requirements of production efficiency. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a discharging structure and a mixer to realize automatic discharging and improve the discharging efficiency of battery slurry.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A discharging structure includes a discharging port arranged at the bottom of a mixing inner cylinder, and further includes a piston-type discharging assembly. The piston-type discharging assembly is communicated with the discharging port through a rotary joint. The piston-type discharging assembly includes:

[0007] A first discharging pipe and a second discharging pipe which are coaxially arranged, and the first discharging pipe is rotatably connected with the second discharging pipe. The first discharging pipe is arranged inside the rotary joint and fixedly connected with the mixing inner cylinder, and a third discharging pipe is communicated with the side wall of the second discharging pipe;

[0008] A piston rod, a first piston connected to the piston rod, and a driving member. The first piston is slidably connected inside the first discharging pipe and the second discharging pipe, and the driving member is used to drive the piston rod to move so that the first piston moves to a position below the discharging port or the pipe orifice of the discharging pipe;

[0009] A rotating body is arranged between the first piston and the piston rod, and the first piston is rotatably connected with the piston rod through the rotating body.

[0010] As a further improvement of the above technical solution, the discharge port includes a first section of channel, a second section of channel, and a third section of channel. Both the first and third sections of channel are straight-hole-shaped, and the diameter of the third section of channel is larger than that of the first section of channel. The diameter of the third section of channel is equal to the inner diameter of the first discharge pipe. The second section of channel is conical-hole-shaped and is connected between the first and third sections of channel.

[0011] As a further improvement of the above technical solution, the outer peripheral surface of the first piston includes a first cylindrical surface, a conical surface, and a second cylindrical surface. The first cylindrical surface is slidably and sealingly arranged with the inner wall of the first section of channel. The second cylindrical surface is slidably and sealingly arranged with the inner wall of the third section of channel. The conical surface is connected between the first cylindrical surface and the second cylindrical surface and is arranged opposite to the second section of channel.

[0012] As a further improvement of the above technical solution, a plurality of grooves are provided on the first cylindrical surface. The grooves are arranged along the height direction of the first cylindrical surface and penetrate through the first cylindrical surface.

[0013] As a further improvement of the above technical solution, a second piston is provided on the piston rod. The second piston is slidably connected inside the second discharge pipe.

[0014] As a further improvement of the above technical solution, the inner walls of the discharge port, the first discharge pipe, and the second discharge pipe are all mirror-polished.

[0015] As a further improvement of the above technical solution, the driving member includes an oil cylinder. The oil cylinder is connected to one end of the second discharge pipe away from the first discharge pipe. The output end of the oil cylinder is connected to the piston rod through a floating joint.

[0016] As a further improvement of the above technical solution, the included angle between the third discharge pipe and the second discharge pipe is 20 - 25°. The third discharge pipe is connected with a discharge pipe, and a first automatic ball valve is provided between the third discharge pipe and the discharge pipe.

[0017] As a further improvement of the above technical solution, a first detection pipe is communicated with the side wall of the third discharge pipe. The first detection pipe is connected with a second detection pipe, and a second automatic ball valve is provided between the first detection pipe and the second detection pipe.

[0018] As a further improvement of the above technical solution, the first discharge pipe and the second discharge pipe are rotatably connected through a labyrinth seal structure; an oil seal is also provided between the first discharge pipe and the second discharge pipe.

[0019] The technical solution provided by the present utility model further includes:

[0020] A blender, comprising a stirring inner cylinder, an inner cylinder rotating assembly, a dispersing assembly, a scraping blade assembly and a discharging structure in the above technical solution. The inner cylinder rotating assembly is used to drive the stirring inner cylinder to rotate. The dispersing assembly is used to stir and disperse the slurry in the stirring inner cylinder. The scraping blade assembly is used to scrape the slurry adhering to the inner wall of the stirring inner cylinder. The discharging structure is used to discharge the slurry in the stirring inner cylinder.

[0021] The beneficial effects of the present utility model are as follows: By adding a piston-type discharging assembly at the bottom of the stirring inner cylinder, during discharging, the first piston moves downward, generating negative pressure to suck the slurry in the stirring content into the first discharging pipe, and then flowing through the second discharging pipe and discharging from the third discharging pipe. Automatic discharging is realized through an automatic ball valve. Compared with the prior art, there is no need for manual connection of the discharging pipe, which greatly improves the working efficiency. In addition, the piston-type discharging assembly is communicated with the discharging port through a rotary joint, so that the third discharging pipe does not rotate with the stirring inner cylinder, ensuring the normal operation of the stirring inner cylinder. Description of the Drawings

[0022] The present utility model will be further described below with reference to the drawings and embodiments.

[0023] Figure 1 is the front view of a discharging structure in an embodiment of the present utility model;

[0024] Figure 2 is Figure 1 the structural exploded view of

[0025] Figure 3 is Figure 1 the sectional view of

[0026] Figure 4 is Figure 3 the schematic diagram of another state of

[0027] Figure 5 is the schematic diagram of the first piston, the second piston and the piston rod in an embodiment of the present utility model;

[0028] Figure 6 is Figure 5 the structural exploded view of

[0029] Figure 7 is the schematic diagram of the connection structure between the first discharging pipe and the second discharging pipe in an embodiment of the present utility model.

[0030] Reference signs: 1, inner stirring cylinder; 11, discharge port; 2, piston-type discharging assembly; 21, rotary joint; 22, first discharge pipe; 23, second discharge pipe; 231, third discharge pipe; 232, first detection pipe; 233, discharge pipe; 234, first automatic ball valve; 235, second detection pipe; 236, second automatic ball valve; 24, first piston; 241, groove; 242, bearing seat; 243, bearing; 244, sealing ring; 25, piston rod; 26, second piston; 27, floating joint; 28, oil cylinder; 29, labyrinth seal structure; 210, oil seal; 211, oil seal gland. Detailed implementation manners

[0031] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to the specific implementation situation. For example, fixed connection / installation can be connected by accessories such as screws and bolts, or directly connected by welding, bonding and other methods. The various technical features in the creation of the present utility model can be combined with each other without conflicting with each other.

[0032] Referring to Figure 1 , an embodiment of the present utility model discloses a mixer, which includes an inner stirring cylinder 1, an inner cylinder rotating assembly, a dispersion assembly, a scraper assembly and a discharging structure. The inner cylinder rotating assembly is used to drive the inner stirring cylinder 1 to rotate. The dispersion assembly drives the lithium battery raw materials to be irregularly stirred, mixed, kneaded and dispersed in the inner stirring cylinder 1 to form a slurry, and then discharged from the discharging structure. Then, the scraper assembly is used to scrape the slurry adhered to the inner wall of the inner stirring cylinder 1, so that the slurry can enter the discharging structure more easily.

[0033] In the embodiment of the present utility model, the discharging structure is specifically disclosed. Referring to Figures 1-4 , the discharging structure includes a piston-type discharging assembly 2, a discharge port 11 at the bottom of the inner stirring cylinder 1, and the discharge port 11 is located at the central part of the inner stirring cylinder 1. The piston-type discharging assembly 2 is communicated with the discharge port 11 through a rotary joint 21, so as to ensure that the main body part of the piston-type discharging assembly 2 does not rotate with the inner stirring cylinder 1.

[0034] In this embodiment, referring to Figures 1-4, the piston-type discharging assembly 2 includes a first discharging pipe 22 and a second discharging pipe 23 which are coaxially arranged. The first discharging pipe 22 is rotatably connected to the second discharging pipe 23. The first discharging pipe 22 is arranged inside the rotary joint 21 and fixedly connected to the stirring inner cylinder 1. A third discharging pipe 231 which is inclined downward is communicated with the side wall of the second discharging pipe 23. The included angle between the third discharging pipe 231 and the second discharging pipe 23 is 20-25° to improve the flow effect of the slurry. The slurry flows from the discharging port 11 on the stirring inner cylinder 1 into the first discharging pipe 22, then flows into the third discharging pipe 231 through the second discharging pipe 23. The third discharging pipe 231 can be connected to a discharging pipe 233 to realize the discharging of the slurry. Through the above settings, the first discharging pipe 22 will rotate together with the stirring inner cylinder 1, while the second discharging pipe 23 will not rotate together with the stirring inner cylinder 1, and the third discharging pipe 231 and the discharging pipe 233 will not rotate together with the stirring inner cylinder 1 either. Thus, the discharging pipe 233 can be continuously connected. A first automatic ball valve 234 is arranged between the discharging pipe 233 and the third discharging pipe 231 to realize automatic discharging, thereby improving the production efficiency.

[0035] In the above embodiment, the piston-type discharging assembly 2 further includes a piston rod 25, a first piston 24 connected to the piston rod 25, and a driving member. The first piston 24 is slidably connected inside the first discharging pipe 22 and the second discharging pipe 23. The driving member is used to drive the piston rod 25 to move so that the first piston 24 moves to the position of the discharging port 11 or below the pipe orifice of the discharging pipe (the end where the third discharging pipe 231 is communicated with the second discharging port 11). When the first piston 24 moves to the position of the discharging port 11, the discharging port 11 is blocked to ensure the normal operation during the slurry stirring. When discharging is required after the slurry processing is completed, the driving member drives the first piston 24 to move downward and be located below the communicating position of the third discharging pipe 231 and the second discharging port 11. In this way, the slurry can flow from the discharging port 11 through the first discharging pipe 22 and the second discharging pipe 23, and then be discharged from the third discharging pipe 231.

[0036] In the above embodiment, referring to Figure 7 , the structure in which the first discharging pipe 22 is rotatably connected to the second discharging pipe 23 mainly adopts a labyrinth seal structure 29 to prevent the slurry from overflowing. Specifically, the shape of the labyrinth seal structure 29 can be a stepped labyrinth seal structure 29. The second discharging pipe 23 is fixedly installed on the frame of the mixer through lugs provided on its side wall. The rotary joint 21 is also installed on the frame. In this way, when the driving device drives the stirring inner cylinder 1 to rotate, the second discharging pipe 23 remains stationary, and the rotating connection part between the first discharging pipe 22 and the second discharging pipe 23 is not stressed, that is, the position of the labyrinth seal structure 29 of the second discharging pipe is not under the downward pressure of the first discharging pipe 22, thereby reducing the wear of the labyrinth seal structure 29 between the two.

[0037] Furthermore, an oil seal 210 is provided between the first discharge pipe 22 and the second discharge pipe 23 to enhance the sealing effect and prevent the slurry from overflowing. An oil seal gland 211 is provided on the second discharge pipe 23 to ensure the stability of the oil seal 210 after installation.

[0038] In a preferred embodiment, a rotating body is provided between the first piston 24 and the piston rod 25. The first piston 24 is rotatably connected to the piston rod 25 through the rotating body. In this way, when the first piston 24 moves to the discharge port 11, that is, during the normal operation of the slurry stirring, the first piston 24 will rotate together with the stirring inner cylinder 1. The synchronous rotation of the two can ensure the sealing effect. In addition, it can also avoid the problem that the first piston 24 always rubs against the discharge port 11 and the first discharge pipe 22, resulting in a reduced service life of the first piston 24.

[0039] Specifically, referring to Figure 6 , the rotating body includes a bearing seat 242 and a bearing 243 installed inside the bearing seat 242. The bearing 243 is fixedly sleeved on the piston rod 25, and the bearing seat 242 is fixedly connected inside the first piston 24, thereby realizing the rotation of the first piston 24.

[0040] In a preferred embodiment, referring to Figures 1-4 , the discharge port 11 includes a first section of passage, a second section of passage, and a third section of passage. Both the first and third sections of passage are straight holes, and the diameter of the third section of passage is larger than that of the first section of passage. The diameter of the third section of passage is equal to the inner diameter of the first discharge pipe 22. The second section of passage is a tapered hole connected between the first and third sections of passage. By setting the structure of the discharge port 11 with a smaller upper part and a larger lower part, the smoothness of discharging can be improved.

[0041] Correspondingly, the outer peripheral surface of the first piston 24 includes a first cylindrical surface, a conical surface, and a second cylindrical surface. The first cylindrical surface is slidably sealed with the inner wall of the first section of passage, the second cylindrical surface is slidably sealed with the inner wall of the third section of passage, and the conical surface is connected between the first cylindrical surface and the second cylindrical surface and is disposed opposite to the second section of passage. That is, when the first cylindrical surface is completely located in the first section of passage, the conical surface fits against the side wall of the second section of passage, and the second cylindrical surface is located inside the third section of passage, thereby improving the blocking effect of the first piston 24 on the discharge port 11.

[0042] Furthermore, referring to Figure 5 and Figure 6, a plurality of grooves 241 are provided on the first cylindrical surface. The plurality of grooves 241 are arranged along the height direction of the first cylindrical surface and are evenly spaced along the circumferential direction of the first cylindrical surface. The grooves penetrate the first cylindrical surface. When the first piston 24 moves upward, the gas in the stirring inner cylinder 1 can enter the first discharge pipe 22 from the grooves 241 to achieve the pressure relief function. At the same time, the slurry remaining at the discharge port 11 will enter the grooves 241 to prevent the slurry from remaining in the second passage and affecting its fitting effect with the conical surface on the first piston 24.

[0043] In a preferred embodiment, referring to Figures 1-6 , a second piston 26 is provided on the piston rod 25. The second piston 26 is slidably connected inside the second discharge pipe 23. The second piston 26 includes a first U-shaped sealing ring 244 and a guiding strip. By adding a force application point through the second piston 26, the straightening of the reciprocating linear motion of the first piston 24 up and down is ensured, and the stability of the up and down movement of the first piston 24 is improved.

[0044] In addition, a second U-shaped sealing ring 244 is connected to the bottom of the first piston 24 to improve the sealing effect.

[0045] In this embodiment, the inner walls of the discharge port 11, the first discharge pipe 22, and the second discharge pipe 23 are all mirror-polished to improve the smoothness of the linear motion of the first piston 24 and the second piston 26 and the sealing effect.

[0046] In this embodiment, the driving member includes an oil cylinder 28. The oil cylinder 28 is connected to one end of the second discharge pipe 23 away from the first discharge pipe 22. The output end of the oil cylinder 28 is connected to the piston rod 25 through a floating joint 27. In other embodiments, the oil cylinder 28 can adopt driving members such as air cylinders and electric cylinders.

[0047] In a preferred embodiment, referring to Figures 1-4 , a first detection pipe 232 is communicated with the side wall of the third discharge pipe 231. The first detection pipe 232 is connected to a second detection pipe 235. A second automatic ball valve 236 is arranged between the first detection pipe 232 and the second detection pipe 235. The diameter of the detection pipe is much smaller than the diameter of the discharge pipe 233, so that a small amount of slurry can be discharged to detect the quality of the slurry.

[0048] The above is a specific description of the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A discharging structure, comprising a discharging port arranged at the bottom of a mixing inner cylinder, characterized in that: It includes a piston-type discharging assembly, which is connected to the discharging port through a rotary joint, and the piston-type discharging assembly includes: A first discharge pipe and a second discharge pipe are coaxially arranged, and the first discharge pipe is rotatably connected to the second discharge pipe, the first discharge pipe is arranged inside the rotary joint and fixedly connected to the mixing inner cylinder, and the side wall of the second discharge pipe is connected to the third discharge pipe; A piston rod, a first piston connected to the piston rod, and a driving member, wherein the first piston is slidably connected to the first discharge pipe and the second discharge pipe, and the driving member is used to drive the piston rod to move so that the first piston moves to the discharge port or below the pipe port of the discharge pipe; A rotating body is arranged between the first piston and the piston rod, and the first piston is rotatably connected to the piston rod via the rotating body.

2. A discharging structure according to claim 1, characterized in that: The discharge port includes a first section channel, a second section channel and a third section channel, the first section channel and the third section channel are both straight hole-shaped and the diameter of the third section channel is larger than the diameter of the first section channel, the diameter of the third section channel is equal to the inner diameter of the first discharge pipe, and the second section channel is a tapered hole connected between the first section channel and the third section channel.

3. A discharging structure according to claim 2, characterized in that: The outer circumferential surface of the first piston includes a first cylindrical surface, a conical surface and a second cylindrical surface. The first cylindrical surface is slidingly sealed with the inner wall of the first section of the channel, and the second cylindrical surface is slidingly sealed with the inner wall of the third section of the channel. The conical surface is connected between the first cylindrical surface and the second cylindrical surface, and is arranged opposite to the second section of the channel.

4. A discharging structure according to claim 3, characterized in that: A plurality of grooves are arranged on the first cylindrical surface, and the grooves are arranged along the height direction of the first cylindrical surface and penetrate the first cylindrical surface.

5. A discharging structure according to claim 1, characterized in that: The piston rod is provided with a second piston, and the second piston is slidably connected in the second discharge pipe.

6. A discharging structure according to any one of claims 1 to 5, characterized in that: The inner walls of the discharge port, the first discharge pipe and the second discharge pipe are all mirror-polished.

7. A discharging structure according to claim 6, characterized in that: The driving member comprises an oil cylinder, which is connected to an end of the second discharge pipe away from the first discharge pipe, and the output end of the oil cylinder is connected to the piston rod through a floating joint.

8. A discharging structure according to claim 1, characterized in that: The included angle between the third discharge pipe and the second discharge pipe is 20-25°, the third discharge pipe is connected with a discharge pipe, and a first automatic ball valve is arranged between the third discharge pipe and the discharge pipe.

9. A discharging structure according to claim 1, characterized in that: The side wall of the third discharge pipe is connected to a first detection pipe, the first detection pipe is connected to a second detection pipe, and a second automatic ball valve is provided between the first detection pipe and the second detection pipe.

10. A discharging structure according to claim 1, characterized in that: The first discharge pipe and the second discharge pipe are rotatably connected via a labyrinth sealing structure; an oil seal is also provided between the first discharge pipe and the second discharge pipe.

11. A mixer, comprising a mixing inner cylinder, an inner cylinder rotating assembly, a dispersing assembly and a scraper assembly, wherein the inner cylinder rotating assembly is used to drive the mixing inner cylinder to rotate, the dispersing assembly is used to stir and disperse the slurry in the mixing inner cylinder, and the scraper assembly is used to scrape off the slurry adhered to the inner wall of the mixing inner cylinder, characterized in that: It also includes the discharge structure according to any one of claims 1 to 10, and the discharge structure is used to discharge the slurry in the mixing inner cylinder.

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