Automatic powder sampling device

Abstract

The present invention discloses an automatic powder sampling device, which includes a silo, and an installation position is provided on the outer side wall of the silo; a protective cover, the protective cover is installed on the silo through the installation position, and a discharge port is provided on the side of the protective cover away from the silo; a sampling assembly, the sampling assembly includes a scraping rod, a pushing device, a sampling wheel and a cam, the cam is fixed in the protective cover along the axial direction of the sampling wheel, the sampling wheel is rotatably installed in the protective cover around the central axis of the cam, the outer side wall of the sampling wheel fits the inner side wall of the protective cover, a groove for placing materials is provided on the outer side wall of the sampling wheel, the scraping rod and the pushing device pass through the groove and are slidably connected to the sampling wheel along the radial direction of the sampling wheel, the bottoms of the scraping rod and the pushing device are respectively abutted against the cam, and the bottoms of the scraping rod and the pushing device slide relative to the surface of the cam. Therefore, the present invention has the characteristics of high automation degree, high automatic sampling efficiency and simple structure, so it is convenient to be popularized and applied in the field of automatic sampling for the production of lithium battery positive and negative materials.

Description

Technical Field

[0001] The present invention relates to the field of automatic sampling for the production of positive and negative electrode materials of lithium batteries, and particularly to a powder automatic sampling device. Background Art

[0002] The existing powder automatic sampling devices mainly use screw sampling. When using screw sampling, it is easy to form cavities in the silo, resulting in failure to obtain samples. Due to the gap between the screw and the sleeve, when the pressure inside the silo is inconsistent with the external pressure, impurities in the air will contaminate the powder.

[0003] Another existing sampling scheme 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 scheme not only causes greater pollution but also has low operation efficiency. Since the positive and negative electrode materials of lithium batteries are extremely sensitive to metal foreign objects, in order to meet the requirement that the positive and negative electrode materials of lithium batteries are not contaminated during sampling and achieve the purpose of automatic sampling, an automatic powder sampling device that is not contaminated during sampling is needed. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a powder automatic sampling device in which the powder is not contaminated during sampling.

[0005] The powder automatic sampling device according to the first aspect embodiment of the present invention includes a silo, and an installation position is provided on the outer side wall of the silo; a protective cover, the protective cover is installed on the silo through the installation position, and a discharge port is provided on the side of the protective cover away from the silo; a sampling assembly, the sampling assembly includes a scraping rod, a pushing device, a sampling wheel and a cam, the cam is fixed in the protective cover along the axial direction of the sampling wheel, the sampling wheel is rotatably installed in the protective cover around the central axis of the cam, the outer side wall of the sampling wheel fits the inner side wall of the protective cover, a groove for placing materials is provided on the outer side wall of the sampling wheel, the scraping rod and the pushing device pass through the groove and are slidably connected to the sampling wheel in the radial direction of the sampling wheel, the bottoms of the scraping rod and the pushing device are respectively in contact with the cam, and the scraping rod and the pushing device slide relative to the surface of the groove respectively; a driving device, the driving device is used to drive the sampling wheel to rotate.

[0006] The powder automatic sampling device according to the embodiments of the present invention has at least the following technical effects: During the sampling process, by setting the outer wall of the sampling wheel to fit the inner wall of the protective cover, the material sampled by the sampling wheel is less contaminated by the outside world; by the rotation of the sampling wheel driving the scraping rod and the pushing device to slide relatively along the surface of the cam, the scraping rod extends out of the sampling wheel to scrape the material onto the outer wall of the sampling wheel. When the sampling wheel rotates above the discharge port, the pushing device pushes the material onto the mechanical equipment; Therefore, the present invention has the characteristics of high automation, high automatic sampling efficiency and simple structure, so it is convenient to be popularized and applied in the field of automatic sampling for the production of positive and negative electrode materials of lithium batteries.

[0007] 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 abuts against the outer wall of the first running part, and the bottom of the scraping rod is slidably connected to the surface of the first running part. The bottom of the pushing device abuts against the outer wall of the second running part, and the bottom of the pushing device is slidably connected to the surface of the second running part. The first running part and the second running part are fixedly connected.

[0008] 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 the outer side surface of a semi-cylinder. At least two of the concave surfaces are respectively located on both sides of the first convex surface. The concave surfaces are used for the sliding buffer of the scraping rod. The second running part includes a second convex surface formed by a middle protrusion and inclined surfaces formed on both sides. The second convex surface is used to cooperate with the pushing device to push the material. The first convex surface and the second convex surface are located on the same side of the cam, and the radian of the first convex surface is smaller than the radian of the second convex surface.

[0009] According to some embodiments of the present invention, the pushing device includes a pushing rod and a pushing plate. One end of the pushing rod away from the cam is provided with a pushing plate. The pushing plate is integrally formed with the pushing rod. The size of the groove matches the size of the pushing plate. The scraping rod passes through the pushing plate and is installed in the sampling wheel.

[0010] According to some embodiments of the present invention, a plurality of the grooves are provided, and the plurality of grooves are arranged in sequence along the outer wall of the sampling wheel. The number of the scraping rods and the pushing devices is set to be the same as the number of the grooves.

[0011] According to some embodiments of the present invention, one end of the protective cover facing the silo is formed into an open-shaped feeding port, and one end of the protective cover away from the silo is provided with a downwardly extending discharge port. The feeding port is used to cooperate with the scraping rod and the sampling wheel for sampling.

[0012] According to some embodiments of the present invention, it further includes a weighing device, which is located below the discharge port and is used to measure the sampling amount of the sampling component.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the invention. Description of the Drawings

[0014] The additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 is a schematic structural diagram of the powder automatic sampling device according to the embodiment of the present invention;

[0016] Figure 2 is a cross-sectional view of the pusher rod in the sampling component;

[0017] Figure 3 is a cross-sectional view of the scraping rod sampling in the sampling component;

[0018] Figure 4 is a cross-sectional view of the pusher rod and the scraping rod;

[0019] Figure 5 is a cross-sectional view of the sampling wheel;

[0020] Figure 6 is a schematic structural diagram of the cam;

[0021] Figure 7 is a schematic structural diagram of the pusher rod and the scraping rod installed on the cam;

[0022] Reference Signs:

[0023] Silos 100;

[0024] Protective Cover 200, Discharge Port 210;

[0025] Scraping Rod 300, Pusher Plate 311, Pusher 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 Portion 350;

[0026] Motor 400, Rotating Shaft 401, Driving Wheel 410, Belt 420, Belt Pulley 430;

[0027] Weighing Device 500. Detailed Embodiments

[0028] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0029] The present invention relates to an automatic powder sampling device, which includes a silo 100, a sampling assembly, a protective cover 200, and a driving device.

[0030] As Figures 1 to 7 shown, an installation position is provided on the outer side wall of the lower part of the silo 100. The lower part here does not include the bottom surface of the silo 100, but the outer side wall of the silo 100 along the vertical extension direction. As Figure 1 shown, the protective cover 200 is installed on the outer side wall of the lower part of the silo 100 through the installation position. An outlet 210 for the material to slide down is provided at the bottom of the protective cover 200. The protective cover 200 is used to reduce the contamination of the material by the outside during the sampling process. As Figures 2 to 6 shown, the sampling assembly includes a scraping rod 300, a pushing device, a sampling wheel 320, and a cam 330. As Figure 5 shown, the sampling wheel 320 is a cylindrical-shaped structure. A pulley 430 is provided on the outer side wall of the sampling wheel 320. The pulley 430 and the sampling wheel 320 are arranged on the same central axis. The outer side wall of the sampling wheel 320 is attached to or close to the inner side wall of the protective cover 200, so as to reduce the contact between the material on the sampling wheel 320 and the outside. Grooves 322 are provided on the outer side wall of the sampling wheel 320. The grooves 322 are used to place the material scraped by the scraping rod 300. Two second through holes 323 can be provided in the grooves 322. The scraping rod 300 and the pushing device are respectively installed on the sampling wheel 320 through each second through hole 323. A first installation hole 321 extending along the thickness direction of the sampling wheel 320 is provided at the center of the sampling wheel 320. The first installation 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 Figure 4 shown, the pushing device includes a pushing rod 312 and a pushing plate 311. The pushing plate 311 and the pushing rod 312 are integrally formed. The pushing plate 311 has the same shape as the groove 322. The pushing plate 311 is placed on the groove 322. The pushing plate 311 is provided with a first through hole matching the size of the rod body of the scraping rod 300. The scraping rod 300 passes through the first through hole and is slidably connected to the pushing plate 311 relatively. As Figure 7 shown, the pushing rod 312 and the scraping 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 elastic reset of the pushing rod 312 or the scraping rod 300 after it extends out of the sampling wheel 320. As Figure 6 and Figure 7As shown, the cam 330 includes a first operating portion and a second operating portion. The first operating portion is fixedly connected to the second operating portion, and the cam 330 and the sampling wheel 320 are arranged on the same central axis. By the scraping rod 300 and the pushing rod 312 sliding relatively on the surfaces of the first operating portion and the second operating portion respectively, and cooperating with the driving of the sampling wheel 320 by the scraping rod 300 and the pushing rod 312, the scraping and pushing processes are completed. Therefore, the present invention has the characteristics of automatic sampling, high sampling efficiency, simple structure, and reduction of material pollution during the sampling process. Therefore, the present invention is convenient to be popularized in the field of automatic sampling for the production of positive and negative electrode materials of lithium batteries.

[0031] In some embodiments of the present invention, as Figure 6 and Figure 7 shown, the cam 330 includes a first operating portion and a second operating portion, and the first operating portion and the second operating portion are fixedly connected. As Figure 6 and Figure 7 shown, the first operating portion includes a first convex surface 3311, a first side surface 3313, and a concave surface 3312. The first operating portion is in a cylindrical shape structure. The first side surface 3313 is one of the outer side surfaces of the first operating portion. The first side surface 3313 is a semi-cylindrical outer side surface, and the first side surface 3313 accounts for half of the outer wall of the first operating portion. The remaining outer wall of the first operating portion is the first convex surface 3311 formed by the middle bulge and the concave surfaces 3312 formed by the depressions on both sides of the first convex surface 3311. The scraping rod 300 completes scraping and slides to any concave surface 3312 to buffer the vibration brought by the reset of the buffer spring 340. The second operating portion includes a second convex surface 3321 formed by the middle bulge and inclined surfaces 3322 formed on both sides. When the pushing rod 312 rotates along with the sampling wheel 320 and slides along the inclined surface 3322 to the second convex surface 3321, the pushing rod 312 pushes the material on the groove 322 to slide onto the weighing device 500. The inclined surface 3322 is used to buffer the elastic force generated when the buffer 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.

[0032] In a further embodiment of the present invention, as Figure 2 、 Figure 3 and Figure 7As shown, the cam 330 is fixed on the sampling wheel 320, and the scraping rod 300 and the pushing rod 312 slide on the surfaces of the first operating part and the second operating part respectively as the sampling wheel 320 rotates. The second operating part further includes a second side surface, and the shape of the second side surface is the outer side surface of a semi-cylinder. When the scraping rod 300 rotates with the sampling wheel 320 to the first side surface 3313, the scraping rod 300 extends out of the sampling wheel 320 and rotates with the sampling wheel 320, and at the same time scrapes the materials in the bin 100 onto the outer side wall of the sampling wheel 320. When the scraping rod 300 rotates with the sampling wheel 320 to the concave surface 3312, the spring 340 elastically resets to make the scraping rod 300 return to its original position. When the scraping rod 300 rotates with the sampling wheel 320 to the first convex surface 3311, due to the height difference between the first convex surface 3311 and the second convex surface 3321, the position of the scraping rod 300 is lower than that of the pushing rod 312, that is, the pushing rod 312 slides onto the second convex surface 3321 and pushes the materials onto the weighing device 500. When the pushing rod 312 rotates with the sampling wheel 320 to the second side surface, the pushing rod 312 remains stationary and the pushing plate 311 and the outer side wall of the sampling wheel 320 form a groove 322 for placing materials. When the pushing rod 312 rotates with the sampling wheel 320 to the inclined surface 3322, the spring 340 elastically resets to make the pushing rod 312 return to its original position.

[0033] In some embodiments of the present invention, as Figure 4 and Figure 5 shown, the sampling wheel 320 can be provided with at least two grooves 322, and two second through holes 323 are arranged in each groove 322. The second through hole 323 is divided into the upper half of the second through hole 323 and the 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 rod body of the scraping rod 300 or the pushing rod 312, and the size of the lower half of the second through hole 323 is the same as 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 through the sliding part 350. When the scraping rod 300 or the pushing rod 312 finishes scraping or pushing, that is, when the scraping rod 300 or the pushing rod 312 rotates with the sampling wheel 320 to the concave surface 3312 or the inclined surface 3322 of the cam 330, the spring 340 provides elastic force to make the scraping rod 300 or the pushing rod 312 reset. By arranging a plurality of grooves 322 on the sampling wheel 320, and the grooves 322 are respectively arranged on the outer side wall of the sampling wheel 320 at equal intervals in sequence, and corresponding scraping rods 300 and scraping rods 300 are installed in each groove 322, the sampling wheel 320 can perform sampling and pushing synchronously, thereby improving the sampling efficiency. It should be noted that the number of grooves 322 installed is set according to the size of the sampling wheel 320.

[0034] In a further embodiment of the present invention, as Figure 1As shown, it further includes a weighing device 500. A first bracket is welded to the bottom of the silo 100. The first bracket is a mounting plate and has the same shape as the bottom surface of the silo 100. One end of the first bracket extends outward to form a supporting part, and a second bracket and a third bracket are welded to the supporting part. The second bracket is a bracket for the motor 400, and the third bracket is in the shape of a chair. The second bracket and the third bracket are respectively used to support the driving device and the weighing device 500, so as to improve the structural stability during the operation of the driving device and the weighing process of the weighing device 500. As Figure 1 shown, the driving device includes a motor 400, a driving wheel 410, a belt 420 and a belt pulley 430. The motor 400 is provided with a rotating shaft 401. The driving wheel 410 is rotatably connected to the motor 400 through the rotating shaft 401, and the driving wheel 410 is rotatably connected to the belt pulley 430 through the belt 420. The motor 400 drives the driving wheel 410 to rotate, so as to drive the belt pulley 430 to rotate through the belt 420, and make the sampling wheel 320 rotate along with the belt pulley 430. By adopting the transmission connection mode of the belt 420 and the belt pulley 430, the present invention reduces the vibration generated when the driving device or the sampling wheel 320 rotates, thereby improving the weight accuracy of the sampled material.

[0035] In some embodiments of the present invention, as Figure 1 、 Figure 2 and Figure 3 shown, the shape structure of the protective cover 200 matches the shape structure of the sampling wheel 320. The protective cover 200 can be a spiral shell-shaped hollow shell. One side of the protective cover 200 away from the outer wall of the silo 100 extends downward to form a discharge port 210, and 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 the protective cover 200 communicates with the silo 100. A second mounting hole is provided at the center of the protective cover 200. The sampling wheel 320 is rotatably mounted on the outer wall of the protective cover 200 through the second mounting hole. The outer wall of the sampling wheel 320 fits or is close to the inner wall of the protective cover 200, so that the belt pulley 430 is located outside the protective cover 200, which is convenient for the connection between the belt pulley 430 and the driving device. The protective cover 200 reduces the pollution caused by the outside world to the material during the sampling of the sampling assembly. Specifically, one end of the protective cover 200 facing the silo 100 is formed as an open inlet, which is convenient for the scraping rod 300 to extend out of the sampling wheel 320 and scrape the material onto the groove 322 when the sampling wheel 320 rotates to the inlet.

[0036] Among them, taking the operation of the sampling component as an example, first, the operator sets the sampling time and sampling period. During operation, the motor 400 drives the material taking component to operate through the belt 420. Inside the bin 100, the scraping rod 300 extends out of the sampling wheel 320 to scrape the material under the relative sliding on the surface of the central cam 330. The material drops onto 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 resets under the drive of the concave surface 3312 of the cam 330 for buffering and the spring 340. After the material on the sampling wheel 320 rotates out of the bin 100, when the sampling wheel 320 rotates above the discharge port 210, the bottom of the pushing rod 312 slides onto the second operating part of the cam 330, so that the pushing rod 312 pushes the material placed in the groove 322 onto the protective cover 200 and slides down along the inner wall of the protective cover 200 into the weighing device 500. The sampling device rotates continuously in the clockwise or counterclockwise direction for sampling until the set sampling amount is reached and then stops working. Then, the sample is manually packed into a packaging bag.

[0037] In the description of this specification, the description with reference to terms such as "some embodiments" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A powder automatic sampling device, characterized in that: include: A silo (100), wherein an outer side wall of the silo (100) is provided with a mounting position; A protective cover (200), the protective cover (200) being installed on the silo (100) through the installation position, and a discharge port (210) being provided on a side of the protective cover (200) away from the silo (100); The sampling assembly comprises a scraper rod (300), a pushing device, a sampling wheel (320) and a cam (330), wherein the cam (330) is fixed in the protective cover (200) along the axial direction of the sampling wheel (320), and the sampling wheel (320) is rotatably installed in the protective cover (200) around the central axis of the cam (330), and the outer side wall of the sampling wheel (320) is in contact with the inner side wall of the protective cover (200). The outer wall of the sampling wheel (320) is provided with a groove (322) for placing materials, the scraper rod (300) and the pushing device pass through the groove (322) and are slidably connected to the sampling wheel (320) along the radial direction of the sampling wheel (320), the bottoms of the scraper rod (300) and the pushing device are respectively in contact with the cam (330), and the scraper rod (300) and the bottoms of the pushing device respectively slide relative to the surface of the groove (322); a driving device, the driving device being used to drive the sampling wheel (320) to rotate; The sampling wheel (320) rotates, driving the scraping rod (300) and the pushing device to slide relative to each other along the surface of the cam (330), so that the scraping rod (300) extends out of the sampling wheel (320) to scrape the material onto the outer wall of the sampling wheel (320). When the sampling wheel (320) rotates to above the discharge port (210), the pushing device pushes the material onto the mechanical equipment.

2. 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, the bottom of the scraper rod (300) abuts against the outer wall of the first operating part, and the bottom of the scraper rod (300) is slidably connected relative to the surface of the first operating part, the bottom of the pushing device abuts against the outer wall of the second operating part, and the bottom of the pushing device is slidably connected relative to the surface of the second operating part, and the first operating part and the second operating part are fixedly connected.

3. The automatic powder sampling device according to claim 2, characterized in that: The first operating portion includes a first convex surface (3311), a first side surface (3313) and at least two concave surfaces (3312), wherein the first side surface (3313) is in the shape of a semi-cylindrical outer side surface, and the at least two concave surfaces (3312) are respectively located on both sides of the first convex surface (3311), and the concave surfaces (3312) are used for sliding buffering of the scraper rod (300). The second operating portion includes a second convex surface (3321) formed by a central protrusion and inclined surfaces (3322) formed by inclinations on both sides, and the second convex surface (3321) is used to cooperate with the pushing device to push materials. 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 that of the second convex surface (3321).

4. The automatic powder sampling device according to claim 1, characterized in that: The pushing device comprises a pushing rod (312) and a pushing plate (311); the pushing plate (311) is provided at one end of the pushing rod (312) away from the cam (330); the pushing plate (311) and the pushing rod (312) are integrally formed; the size of the groove (322) matches that of the pushing plate (311); the scraping rod (300) passes through the pushing plate (311) and is installed in the sampling wheel (320).

5. The powder automatic sampling device according to claim 4, characterized in that: The grooves (322) are provided in plurality, and the plurality of grooves (322) are sequentially provided along the outer side wall of the sampling wheel (320), and the number of the scraping rods (300) and the pushing devices is provided to be consistent with the number of the grooves (322).

6. The automatic powder sampling device according to claim 1, characterized in that: The protective cover (200) has an open feed port at one end facing the silo (100), and a downwardly extending discharge port (210) is provided at one end of the protective cover (200) away from the silo (100). The feed port is used to cooperate with the scraper rod (300) and the sampling wheel (320) for sampling.

7. The automatic powder sampling device according to claim 1, characterized in that: It also includes a weighing device (500), which is located below the discharge port (210) and is used to measure the sampling volume of the sampling component.

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