WO2024021230A1

WO2024021230A1 - Automatic powder sampling device

Info

Publication number: WO2024021230A1
Application number: PCT/CN2022/117477
Authority: WO
Inventors: 张明革; 陈雷; 梁志豪; 李长东
Original assignee: 广东邦普循环科技有限公司; 湖南邦普循环科技有限公司
Priority date: 2022-07-28
Filing date: 2022-09-07
Publication date: 2024-02-01
Also published as: FR3138521A1; CN115356144A

Abstract

An automatic powder sampling device, comprising: a material bin (100), the outer side wall of the material bin (100) being provided with a mounting position; a protective cover (200), the protective cover (200) passing through the mounting position and being mounted on the material bin (100), and the side of the protective cover (200) away from the material bin (100) being provided with a discharge port (210); and a sampling assembly, comprising a material scraping rod (300), a material pushing device, a sampling wheel (320) and a cam (330), the cam (330) being fixed in the protective cover (200) in the axial direction of the sampling wheel (320), the sampling wheel (320) being rotatably mounted in the protective cover (200) around the central axis of the cam (330), the outer side wall of the sampling wheel (320) being attached to the inner side wall of the protective cover (200), a recess (322) for placing materials being provided in the outer side wall of the sampling wheel (320), the material scraping rod (300) and the material pushing device passing through the recess (322) and being slidably connected into the sampling wheel (320) in the radial direction thereof, the bottoms of the material scraping rod (300) and the material pushing device abutting against the cam (330) respectively, and the bottoms of the material scraping rod (300) and the material pushing device sliding with respect to the surface of the cam (330) respectively. The device has the characteristics of high automation degree, high automatic sampling efficiency and simple structure, facilitating popularization and use in the field of automatic sampling in production of positive and negative electrode materials of lithium batteries.

Description

Automatic powder sampling device

Technical field

The invention relates to the field of automatic sampling for the production of positive and negative electrode materials of lithium batteries, and in particular, to an automatic powder sampling device.

Background technique

Existing automatic powder sampling devices mainly use screw sampling. When the screw is sampling, it is easy to form holes in the silo, resulting in failure to sample. Due to the gap between the screw and the sleeve, when the silo is inconsistent with the external pressure, it will Impurities in the air may contaminate the powder.

Another existing sampling plan is manual sampling. When sampling, the operator needs to open the upper cover of the silo, and then the operator uses a spoon to take samples. Therefore, this sampling plan not only causes greater pollution, but also has low operating efficiency. Since the positive and negative electrode materials of lithium batteries are extremely sensitive to metal foreign matter, in order to meet the requirements for the positive and negative electrode materials of lithium batteries not to be contaminated during sampling and to meet the purpose of automated sampling, an automatic and non-contaminated sampling device is needed. Automatic powder sampling device.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention proposes an automatic powder sampling device that prevents powder from being contaminated during sampling.

The automatic powder sampling device according to the first embodiment of the present invention includes a silo, with a mounting position provided on the outer wall of the silo; and a protective cover, which passes through the mounting position and is installed on the silo. On the side of the protective cover away from the silo, a discharge port is provided; a sampling assembly includes a scraper rod, a pushing device, a sampling wheel and a cam, and the cam is arranged along the axial direction of the sampling wheel. The direction is fixed in the protective cover. The sampling wheel is installed in the protective cover to rotate around the central axis of the cam. The outer wall of the sampling wheel fits the inner wall of the protective cover. The sampling wheel The outer wall of the wheel is provided with a groove for placing materials. The scraper rod and the pushing device pass through the groove and are slidingly connected to the sampling wheel along the radial direction of the sampling wheel. The scraper The material rod and the bottom of the pushing device are respectively in contact with the cam, and the scraping rod and the pushing device respectively slide relative to the groove surface; a driving device is used to drive the The sampling wheel rotates.

The automatic powder sampling device according to the embodiment of the present invention has at least the following technical effects: during the sampling process, the outer wall of the sampling wheel is set to fit the inner wall of the protective cover, thereby reducing external contamination of the material picked up by the sampling wheel; through the rotation of the sampling wheel The scraping rod and the pushing device are driven to slide relative to each other along the cam surface, so that the scraping rod extends out of the sampling wheel and scrapes the material to the outer wall of the sampling wheel. When the sampling wheel rotates to the top of the discharge port, the pushing device will push the material to the outside wall of the sampling wheel. The material is pushed onto the mechanical equipment; therefore, the invention has the characteristics of high degree of automation, high automatic sampling efficiency and simple structure, so it is easy to be promoted and applied in the field of automatic sampling of positive and negative electrode materials of lithium batteries.

According to some embodiments of the present invention, the cam is provided with a first running part and a second running part, the bottom of the scraping rod is in contact with the outer side wall of the first running part, and the bottom of the scraping rod is opposite to the The surface of the first running part is slidingly connected, the bottom of the pushing device is in contact with the outer wall of the second running part, the bottom of the pushing device is slidingly connected with the surface of the second running part, the first running part and The second running part is fixedly connected.

According to some embodiments of the present invention, the first running part includes a first convex surface, a first side surface and at least two concave surfaces, the first side surface is in the shape of a semi-cylindrical outer surface, and the at least two concave surfaces are respectively located on the On both sides of the first convex surface, the concave surface is used for sliding buffering of the scraper rod. The second running part includes a second convex surface formed by a bulge in the middle and an inclined surface formed on both sides. The second convex surface is used for matching The pushing device pushes materials, the first convex surface and the second convex surface are located on the same side of the cam, and the curvature of the first convex surface is smaller than the curvature of the second convex surface.

According to some embodiments of the present invention, the pushing device includes a push rod and a push plate. An end of the push rod away from the cam is provided with a push plate. The push plate is integrally formed with the push rod. The size of the groove matches the size of the push plate, and the scraper rod passes through the push plate and is installed in the sampling wheel.

According to some embodiments of the present invention, the grooves are provided in plurality, and the grooves are arranged in sequence along the outer wall of the sampling wheel, and the number of the scraper rods and the pushing devices is set to be equal to The number of grooves is the same.

According to some embodiments of the present invention, one end of the protective cover facing the silo is formed with an open inlet, and one end of the protective cover away from the silo is provided with an outlet extending downward. , the feed port is used to cooperate with the scraper rod and the sampling wheel for sampling.

According to some embodiments of the present invention, a weighing device is further included, the weighing device is located below the discharge port, and the weighing device is used to measure the sampling volume of the sampling assembly.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

Figure 1 is a schematic structural diagram of an automatic powder sampling device according to an embodiment of the present invention;

Figure 2 is a cross-sectional view of the push rod in the sampling assembly;

Figure 3 is a cross-sectional view of the scraper rod sampling in the sampling assembly;

Figure 4 is a cross-sectional view of the push rod and scraper rod;

Figure 5 is a cross-sectional view of the sampling wheel;

Figure 6 is a schematic structural diagram of the cam;

Figure 7 is a schematic structural diagram of the pusher rod and scraper rod installed on the cam;

Reference signs:

Silo 100;

Protective cover 200, discharge port 210;

Scraper rod 300, push plate 311, push rod 312, sampling wheel 320, first mounting hole 321, groove 322, second through hole 323, cam 330, first convex surface 3311, concave surface 3312, first side surface 3313, second convex surface 3321, inclined surface 3322, spring 340, sliding part 350;

Motor 400, rotating shaft 401, driving wheel 410, belt 420, pulley 430;

Weighing device 500.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and cannot be understood as limiting the present invention.

The invention relates to an automatic powder sampling device, which includes a bin 100, a sampling component, a protective cover 200 and a driving device.

As shown in FIGS. 1 to 7 , the lower outer wall of the silo 100 is provided with a mounting position. The lower part here does not include the bottom surface of the silo 100 , but is on the outer wall of the silo 100 along the vertical extension direction. As shown in Figure 1, the protective cover 200 is installed on the outer side wall of the lower part of the silo 100 through the installation position. The bottom of the protective cover 200 is provided with a discharge port 210 for the material to slip. The protective cover 200 is used to reduce the risk of material slipping during the sampling process. contaminated by the outside world. As shown in FIGS. 2 to 6 , the sampling assembly includes a scraper rod 300 , a pushing device, a sampling wheel 320 and a cam 330 . As shown in Figure 5, the sampling wheel 320 has a cylindrical shape structure. The outer wall of the sampling wheel 320 is provided with a pulley 430. The pulley 430 and the sampling wheel 320 are arranged on the same central axis. The outer wall of the sampling wheel 320 is close to or close to the protective cover. 200, thereby reducing the contact between the material on the sampling wheel 320 and the outside world. The outer wall of the sampling wheel 320 is provided with a groove 322, and the groove 322 is used to place the material scraped by the scraper rod 300. The groove 322 may be provided with two second through holes 323, and the scraper rod 300 and the pushing device are respectively installed on the sampling wheel 320 through each second through hole 323. The center of the sampling wheel 320 is provided with a first mounting hole 321 extending along the thickness direction of the sampling wheel 320. The first mounting hole 321 facilitates the sampling wheel 320 to be sleeved on the cam 330, so that the sampling wheel 320 is installed on the protective cover 200. As shown in FIG. 4 , the pusher device includes a pusher rod 312 and a pusher plate 311 . The pusher plate 311 and the pusher rod 312 are integrally formed. The pusher plate 311 has the same shape as the groove 322 , and the pusher plate 311 is placed on the groove 322 . The push plate 311 is provided with a first through hole that matches the size of the scraper rod 300. The scraper rod 300 passes through the first through hole and is relatively slidably connected to the push plate 311. As shown in Figure 7, the pusher rod 312 and the scraper rod 300 are respectively provided with a sliding part 350 and a spring 340. The spring 340 is located above the sliding part 350. The spring 340 is used for the pusher rod 312 or the scraper rod 300 to extend out for sampling. Elastic reset after round 320. As shown in FIGS. 6 and 7 , the cam 330 includes a first operating part and a second operating part. The first running part and the second running part are fixedly connected, and the cam 330 and the sampling wheel 320 are arranged on the same central axis. The scraping rod 300 and the pushing rod 312 slide relatively on the surfaces of the first and second running parts respectively, and the scraping rod 300 and the pushing rod 312 are driven by the sampling wheel 320 to complete the scraping and pushing processes. . Therefore, the present invention has the characteristics of automatic sampling, high sampling efficiency, simple structure and reduced material pollution during the sampling process. Therefore, the present invention can be easily promoted in the field of automatic sampling in the production of positive and negative electrode materials of lithium batteries.

In some embodiments of the present invention, as shown in FIGS. 6 and 7 , the cam 330 includes a first operating part and a second operating part, and the first operating part and the second operating part are fixedly connected. As shown in FIGS. 6 and 7 , the first running part includes a first convex surface 3311 , a first side surface 3313 and a concave surface 3312 . The first running part has a cylindrical shape structure. The first side 3313 is one of the outer sides of the first running part. The first side 3313 is the outer side of a semi-cylinder. The first side 3313 occupies half of the outer wall of the first running part. The remaining outer side wall of the first running part is a first convex surface 3311 formed by a bulge in the middle and a concave surface 3312 formed by depressions on both sides of the first convex surface 3311. The scraper rod 300 completes the scraping and slides to any concave surface 3312 of the buffer spring 340. The shock from the reset. The second running part includes a second convex surface 3321 formed by a bulge in the middle and inclined surfaces 3322 formed on both sides. When the ejector rod 312 follows the rotation of the sampling wheel 320, it slides along the inclined surface 3322 to the second convex surface 3321, so that the ejector rod 312 pushes The material on the groove 322 slides onto the weighing device 500 , and the slope 3322 is used to buffer the elastic force generated when the spring 340 resets the pushing rod 312 . Specifically, the first convex surface 3311 and the second convex surface 3321 are located on the same side of the cam 330 , and both the first convex surface 3311 and the second convex surface 3321 face the discharge port 210 .

In a further embodiment of the present invention, as shown in Figures 2, 3 and 7, the cam 330 is fixed on the sampling wheel 320, and the scraper rod 300 and the pushing rod 312 follow the rotation of the sampling wheel 320 and are respectively in the first operation. The surface of the first and second running parts slides. The second running part also includes a second side surface, and the second side surface is in the shape of a semi-cylinder outer surface. When the scraper rod 300 follows the sampling wheel 320 to rotate to the first side 3313, the scraper rod 300 extends out of the sampling wheel 320 and rotates with the sampling wheel 320, and at the same time scrapes the material in the bin 100 to the outer wall of the sampling wheel 320. superior. When the scraper rod 300 follows the sampling wheel 320 to rotate to the concave surface 3312, the spring 340 elastically returns to the original position. When the scraper rod 300 follows the sampling wheel 320 to rotate to the first convex surface 3311, the scraper rod 300 is positioned farther than the pushing rod 312 due to the height difference between the first convex surface 3311 and the second convex surface 3321. Low, that is, the pushing rod 312 slides to the second convex surface 3321 and pushes the material to the weighing device 500 . When the ejector rod 312 rotates to the second side following the sampling wheel 320, the ejector rod 312 remains stationary and the push plate 311 and the outer wall of the sampling wheel 320 form a groove 322 for placing materials. When the ejector rod 312 follows the sampling wheel 320 and rotates to the inclined plane 3322, the spring 340 elastically returns so that the ejector rod 312 returns to its original position.

In some embodiments of the present invention, as shown in FIGS. 4 and 5 , the sampling wheel 320 may be provided with at least two grooves 322 , and each groove 322 is provided with two second through holes 323 . The second through hole 323 is divided into an upper half of the second through hole 323 and a lower half of the second through hole 323. The size of the upper half of the second through hole 323 is the same as the size of the upper half of the scraper rod 300 or the push rod 312. The size of the lower half of the second through hole 323 is consistent with the size of the sliding part 350 . When the scraping rod 300 or the pushing rod 312 extends out of the sampling wheel 320, the spring 340 is compressed and contracted by the sliding part 350. When the scraping rod 300 or the pushing rod 312 completes scraping or pushing, that is, the scraping rod 300 or the pushing rod 312 follows the sampling wheel 320 to rotate to the concave surface 3312 or the inclined surface 3322 of the cam 330, and the spring 340 provides elastic force to scrape the material. The lever 300 or the ejector lever 312 is reset. The sampling wheel 320 is provided with a plurality of grooves 322. Each groove 322 is arranged on the outer side wall of the sampling wheel 320 at equal intervals. Each groove 322 is equipped with a corresponding scraper rod 300 and a scraper rod 300, so that sampling can be carried out Wheel 320 synchronizes sampling and pushing, thereby increasing sampling efficiency. It should be noted that the number of grooves 322 installed is set according to the size of the sampling wheel 320 .

In a further embodiment of the present invention, as shown in Figure 1, a weighing device 500 is also included. A first bracket is welded to the bottom of the bin 100. The first bracket is a mounting plate and the shape of the first bracket is consistent with the shape of the bottom surface of the bin 100. . One end of the first bracket extends outward to form a support portion, and the second bracket and the third bracket are welded to the support portion. The second bracket is a motor 400 bracket, and the third bracket is a chair-shaped structure. The second bracket and the third bracket are used to support the driving device and the weighing device 500 respectively, thereby improving the structural stability of the driving device during operation and the weighing device 500 when weighing. As shown in Figure 1, the driving device includes a motor 400, a driving wheel 410, a belt 420 and a pulley 430. The motor 400 is provided with a rotating shaft 401. The driving wheel 410 is rotationally connected to the motor 400 through the rotating shaft 401. The driving wheel 410 is connected to the motor 400 through the belt 420. The pulley 430 is rotationally connected. The motor 400 drives the driving wheel 410 to rotate, thereby driving the pulley 430 to rotate through the belt 420, so that the sampling wheel 320 rotates along with the pulley 430. The present invention uses the transmission connection mode of the belt 420 and the pulley 430 to reduce the vibration generated when the driving device or the sampling wheel 320 rotates, thereby improving the weight accuracy of the sampled materials.

In some embodiments of the present invention, as shown in Figures 1, 2 and 3, the shape and structure of the protective cover 200 matches the shape and structure of the sampling wheel 320, and the protective cover 200 can be a volute-shaped hollow shell. The side of the protective cover 200 away from the outer wall of the bin 100 extends downward to form a discharge port 210 . The discharge port 210 faces the weighing device 500 or is located above the weighing device 500 . The protective cover 200 is integrally formed with the silo 100 and is connected to the silo 100. A second installation hole is provided in the center of the protective cover 200. The sampling wheel 320 is rotatably installed on the outer wall of the protective cover 200 through the second mounting hole. The outer wall of the sampling wheel 320 is close to or close to the inner wall of the protective cover 200 so that the pulley 430 is placed outside the protective cover 200 to facilitate the pulley 430 Connected to the driving device, the protective cover 200 reduces external contamination of the material when the sampling component is sampling. Specifically, one end of the protective cover 200 faces the silo 100 to form an open-shaped feed opening, so that when the sampling wheel 320 rotates to the feeding opening, the scraper rod 300 extends out of the sampling wheel 320 and scrapes the material to the groove 322 superior.

Among them, taking the operation of the sampling component as an example, the operator first sets the sampling time and sampling cycle. During operation, the motor 400 drives the sampling component to operate through the belt 420. Inside the silo 100, the scraping rod 300 extends out the sampling wheel 320 to scrape materials under the relative sliding of the surface of the center cam 330. The material falls to the outer wall of the sampling wheel 320 as the scraping rod 300 slides. The sampling wheel 320 continues to rotate, and then the scraping rod 300 is reset driven by the concave surface 3312 of the cam 330 and the spring 340. After the material on the sampling wheel 320 is transferred out of the silo 100, when the sampling wheel 320 rotates above the discharge port 210, the bottom of the pushing rod 312 slides to the second running part of the cam 330, so that the pushing rod 312 The material placed in the groove 322 is pushed onto the protective cover 200 and slides along the inner wall of the protective cover 200 into the weighing device 500 . The sampling device rotates in a clockwise or counterclockwise direction until it stops working until the set sampling volume is reached, and then the sample is manually packed into the packaging bag.

In the description of this specification, reference to the terms "some embodiments" and the like means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the invention. The scope of the invention is defined by the claims and their equivalents.

Claims

An automatic powder sampling device, characterized by including:

A silo (100), the outer wall of the silo (100) is provided with an installation position;

Protective cover (200). The protective cover (200) passes through the installation position and is installed on the silo (100). The protective cover (200) is provided with a Discharge port (210);

Sampling assembly, the sampling assembly includes a scraper rod (300), a pushing device, a sampling wheel (320) and a cam (330). The cam (330) is fixed on the sampling wheel (320) along the axial direction. In the protective cover (200), the sampling wheel (320) is rotatably installed in the protective cover (200) around the central axis of the cam (330), and the outer wall of the sampling wheel (320) fits The inner wall of the protective cover (200) and the outer wall of the sampling wheel (320) are provided with a groove (322) for placing materials, and the scraper rod (300) and the pushing device pass through the The groove (322) is slidably connected to the sampling wheel (320) along the radial direction of the sampling wheel (320). The scraper rod (300) and the bottom of the pushing device are respectively connected with the cam (322). 330) contact, the scraper rod (300) and the bottom of the pushing device respectively slide relative to the surface of the groove (322);

Driving device, the driving device is used to drive the sampling wheel (320) to rotate.
The automatic powder sampling device according to claim 1, characterized in that: the cam (330) is provided with a first operating part and a second operating part, and the bottom of the scraper rod (300) is in contact with the first operating part. The bottom of the scraper rod (300) is in sliding contact with the surface of the first running part. The bottom of the pushing device is in contact with the outer side wall of the second running part. The bottom of the pushing device is in contact with the outer side wall of the second running part. The surface of the second running part is slidingly connected, and the first running part and the second running part are fixedly connected.
The automatic powder sampling device according to claim 2, characterized in that: the first running part includes a first convex surface (3311), a first side (3313) and at least two concave surfaces (3312), and the first The side surface (3313) is in the shape of a semi-cylinder outer surface, and at least two concave surfaces (3312) are located on both sides of the first convex surface (3311). The concave surfaces (3312) are used for the sliding of the scraper rod (300). Buffering, the second running part includes a second convex surface (3321) formed by a bulge in the middle and inclined surfaces (3322) formed on both sides. The second convex surface (3321) is used to push materials in conjunction with the pushing device, The first convex surface (3311) and the second convex surface (3321) are located on the same side of the cam (330), and the curvature of the first convex surface (3311) is smaller than the curvature of the second convex surface (3321). .
The automatic powder sampling device according to claim 1, characterized in that: the pushing device includes a pushing rod (312) and a pushing plate (311), and the pushing rod (312) is away from the cam (330). ) is provided with a push plate (311) at one end. The push plate (311) is integrally formed with the push rod (312). The size of the groove (322) matches the size of the push plate (311). The scraper rod (300) passes through the push plate (311) and is installed in the sampling wheel (320).
The automatic powder sampling device according to claim 4, characterized in that: the grooves (322) are provided in plurality, and the plurality of grooves (322) are sequentially along the outer wall of the sampling wheel (320). It is set that the number of the scraping rod (300) and the pushing device is set to be consistent with the number of the grooves (322).
The automatic powder sampling device according to claim 1, characterized in that: the protective cover (200) faces an open feeding port formed at one end of the silo (100), and the protective cover (200) ) An end away from the silo (100) is provided with a discharge port (210) extending downward. The feed port is used to cooperate with the scraper rod (300) and the sampling wheel (320) for sampling. .
The automatic powder sampling device according to claim 1, further comprising: a weighing device (500) located below the discharge port (210). The device (500) is used to measure the sampling volume of the sampling assembly.