Screening system

Abstract

The utility model provides a screening system. The screening system comprises a screening constant feeder; the screening equipment is connected with a finished product buffer hopper, and the screening equipment is used for screening the materials conveyed by the screening constant feeder to obtain screened materials; the finished product buffering equipment is connected with the finished product buffering hopper, and the finished product buffering equipment is used for receiving and storing the screened materials conveyed by the finished product buffering hopper; the screening detection device comprises an automatic sampler and detection equipment, an inspection screen is arranged in the detection equipment, the automatic sampler is used for taking out a preset amount of the screened materials from the finished product buffer hopper and conveying the screened materials to the inspection screen, and the inspection screen is used for carrying out screening inspection on the screened materials; and the controller is electrically connected with the screening constant feeder and the automatic sampler, and the controller is used for controlling the automatic sampler to sample and controlling the screening constant feeder to stop working when residual materials exist on the inspection screen.

Description

Technical Field

[0001] The utility model relates to the technical field of screening, in particular to a screening system. Background Art

[0002] The particle size distribution of the negative electrode material of lithium-ion batteries is one of the important factors affecting the battery manufacturing process and battery performance. Among them, large particles in the negative electrode material will cause scratches on the surface of the electrode sheet, making the electrode sheet unusable; at the same time, larger particles not found on the electrode sheet will be crushed in the subsequent pair-rolling process, resulting in the scrapping of the electrode sheet. Screening is an effective measure to control large particles in the negative electrode material, and ultrasonic vibrating screens are commonly used equipment for screening negative electrode materials. Since the vibrating screen is a sealed system, the condition of the screen mesh cannot be observed during the production process, and it is impossible to determine whether the screen mesh is broken.

[0003] Currently, in the industry, the control of the screen mesh is usually achieved by controlling the service time of the screen mesh or the weight of the screened material. However, this method cannot know the situation of the screen mesh breaking in advance. If the screen mesh is found to be broken after being disassembled, then the large particle material that has passed through the broken screen mesh from the time of screen mesh breakage to the time of disassembly has already entered the finished product. Summary of the Utility Model

[0004] In order to improve at least some of the above-mentioned disadvantages or deficiencies, an embodiment of the utility model provides a screening system.

[0005] Specifically, a screening system provided by an embodiment of the utility model includes: a screening metering feeder; a screening device, the screening device is connected with a finished product buffer hopper, and the screening device is used for screening the material conveyed by the screening metering feeder to obtain screened material; a finished product caching device, connected to the finished product buffer hopper, and the finished product caching device is used for receiving and storing the screened material conveyed by the finished product buffer hopper; a screening detection device, including an automatic sampler and a detection device, an inspection sieve is arranged in the detection device, the automatic sampler is used for taking a preset amount of the screened material from the finished product buffer hopper and conveying it to the inspection sieve, and the inspection sieve is used for screening and inspecting the screened material; and a controller, electrically connected to the screening metering feeder and the automatic sampler, the controller is used for controlling the automatic sampler to take samples, and when there is residual material on the inspection sieve, controlling the screening metering feeder to stop working.

[0006] In an embodiment of the utility model, a visual window is further arranged on the detection device corresponding to the inspection sieve, and the visual window is used for observing whether there is residual material on the inspection sieve.

[0007] In an embodiment of the utility model, the screening system further includes: a start-stop switch, electrically connected to the controller, and the start-stop switch is used for sending a start-stop signal to the controller in response to a user operation.

[0008] In an embodiment of the present utility model, the screening system further includes: a weighing device, connected to the screening detection device, and the weighing device is electrically connected to the controller. The weighing device is used to weigh the weight of the residual material on the inspection sieve and transmit the weight to the controller, and the controller is used to judge whether there is residual material on the inspection sieve according to the weight.

[0009] In an embodiment of the present utility model, a first sieve mesh and a second sieve mesh are arranged at intervals along the gravity direction on the screening device, and the mesh number of the first sieve mesh is smaller than that of the second sieve mesh, and the mesh number of the inspection sieve is the same as that of the second sieve mesh.

[0010] In an embodiment of the present utility model, the mesh number of the first sieve mesh is 100, 150 or 200 meshes; the mesh number of the second sieve mesh is 270, 300 or 325 meshes.

[0011] In an embodiment of the present utility model, the finished product buffer device includes at least two inspection tanks, a switching valve is arranged between the finished product buffer hopper and the at least two inspection tanks, and the at least two inspection tanks are used to alternately store the screened materials under the control of the switching valve.

[0012] In an embodiment of the present utility model, the screening system further includes: a temporary conveying pipeline, connected between the inspection tank and the screening device, and used to convey the screened materials in the inspection tank to the screening device for re-screening.

[0013] In an embodiment of the present utility model, the screening system further includes: a warning device, electrically connected to the controller, and the controller is used to control the warning device to prompt that the screening device needs to be repaired.

[0014] In an embodiment of the present utility model, the warning device includes: a display, electrically connected to the controller, and the controller is used to control the display to display warning information; and / or, a warning lamp, electrically connected to the controller, and the controller is used to control the warning lamp to give a warning; and / or, a sound device, electrically connected to the controller, and the controller is used to control the sound device to give a warning.

[0015] As can be seen from the above, the above technical features of the present utility model may have one or more of the following beneficial effects: The screening system provided in this embodiment includes a screening and metering feeder, a screening device, a finished product buffer device, a screening detection device, and a controller. Through the setting of the screening detection device, the screened materials after being screened by the screening device can be sampled by an automatic sampler and then inspected by an inspection sieve. The controller can control the automatic sampler to take samples, and the controller can control the screening and metering feeder to stop working when there is residual material on the inspection sieve. Therefore, it can be judged whether there are problems such as missed meshes or breakages in the screening device, and it can be avoided that the screened materials that do not meet the requirements enter the finished products, causing adverse effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a screening system provided by an embodiment of the present utility model.

[0018] Figure 2 It is a schematic structural diagram of a screening system provided by another embodiment of the present utility model.

[0019] Figure 3 For Figure 1 and Figure 2 It is a schematic structural diagram of the screening device in

[0020] Main element numbers:

[0021] 10. Screening and metering feeder; 20. Screening device; 21. Finished product buffer hopper; 22. Coarse material bucket; 201. Housing; 202. First screen; 203. Second screen; 204. Feed inlet; 205. First discharge port; 206. Second discharge port; 207. Third discharge port; 30. Inspection tank; 41. Automatic sampler; 42. Detection device; 421. Inspection sieve; 422. Visual window; 50. Controller; 60. Start-stop switch; 70. Temporary conveying pipeline; 80. Warning device; 90. Weighing device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] See Figure 1 , a screening system provided by an embodiment of the present invention may specifically include, for example: a screening metering feeder 10, a screening device 20, a finished product buffer device, a screening detection device, and a controller 50.

[0024] The screening metering feeder 10 is used to convey materials quantitatively. In this embodiment, the materials may be, for example, graphite materials (negative electrode material materials). Of course, they may also be other materials that need to be screened. The screening device 20 may be connected with a finished product buffer hopper 21. The screening metering feeder 10 conveys the materials to the screening device 20, and the screening device 20 screens the materials to obtain screened materials, that is, large particle materials in the materials are screened out to obtain materials with a required preset particle size. The finished product buffer device is connected to the finished product buffer hopper 21, and the screened materials obtained after screening by the screening device 20 are conveyed to the finished product buffer device through the finished product buffer hopper 21 for storage. The screening detection device may include, for example, an automatic sampler 41 and a detection device 42. An inspection sieve 421 is arranged in the detection device 42. The automatic sampler 41 is used to take a preset amount of the screened materials from the finished product buffer hopper 21 under the control of the controller 50 and convey the screened materials to the inspection sieve 421. The inspection sieve 421 is used to screen and inspect the screened materials. When there is residual material on the inspection sieve 421, it indicates that there are large particle materials that do not meet the requirements in the screened materials and have not been screened, and it can be judged that there may be problems such as missed meshes and breakages in the screening device 20; when there is no residual material on the inspection sieve 421, it indicates that the screened materials all meet the requirements and there are no large particle materials, and it can be judged that there are no problems such as missed meshes and breakages in the screening device 20. The controller 50 may be, for example, an MCU (Microcontroller Unit, micro control unit), a PLC (Programmable Logic Controller, programmable logic controller), etc. The controller 50 can control the automatic sampler 41 to take samples, and can control the screening metering feeder 10 to stop working when there is residual material on the inspection sieve 421, avoiding a large amount of useless work.

[0025] The screening system provided in this embodiment can sample the screened materials after screening by the screening device 20 through the automatic sampler 41 and then inspect them through the inspection sieve 421. The controller 50 can control the automatic sampler 41 to take samples, and the controller 50 can control the screening metering feeder 10 to stop working when there is residual material on the inspection sieve 421. Therefore, it can be determined whether there are problems such as missed meshes or breakages in the screening device 20, and it can prevent the screened materials that do not meet the requirements from entering the finished products, causing adverse effects.

[0026] In the embodiment as Figure 1 shown, a visual window 422 is also provided on the detection device 42 corresponding to the inspection sieve 421. The visual window 422 is used to observe whether there is residual material on the inspection sieve 421. After the inspection sieve 421 finishes working, on-site staff can, for example, observe through the visual window 422 whether there is residual material on the inspection sieve 421. When the staff sees that there is no residual material on the inspection sieve 421, it means that the currently sampled material is qualified, and the screening device is intact, and production can continue. On the contrary, when the staff sees that there is residual material on the inspection sieve 421, it means that the currently sampled material is unqualified, and there are problems such as missed meshes or breakages in the screening device. The screening system may also include a start-stop switch 60, and the start-stop switch 60 is electrically connected to the controller 50. When the staff observes that there is residual material on the inspection sieve 421, they can, for example, operate the start-stop switch 60. The start-stop switch 60 sends a start-stop signal to the controller 50, and the controller 50 controls the screening metering feeder 10 to stop working.

[0027] See Figure 2 , in Figure 2In the illustrated embodiment, the screening system may further include, for example, a weighing device 90. The weighing device 90 is connected to the screening detection device, and the weighing device 90 is electrically connected to the controller 50. Specifically, the weighing device 90 may be connected to the detection device 42, for example. The weighing device 90 is used to weigh the weight of the residual material on the inspection sieve 421 and transmit the weight to the controller 50. The controller 50 is used to judge whether there is residual material on the inspection sieve 421 according to the weight. For example, after the inspection sieve 421 in the detection device 42 finishes working, when there is residual material on the inspection sieve 421, the residual material is conveyed to the weighing device 90, and the weighing device 90 weighs to obtain the weight of the residual material. The controller 50 may compare the weight with a preset weight (such as 0), for example, to judge that there is residual material on the inspection sieve 421 and control the screening metering feeder 10 to stop working; when there is no residual material on the inspection sieve 421, the weight obtained by weighing with the weighing device 90 is 0. The controller 50 may compare the weight with a preset weight (such as 0), for example, to judge that there is no residual material on the inspection sieve 421, and the screening system continues to work. Through the setting of the weighing device 90, the detection of the fully automatic screening device 20 can be realized, saving manpower and improving the production work efficiency.

[0028] See Figure 1 and Figure 2 , the screening system may further include a warning device 80. The warning device 80 is electrically connected to the controller 50, and the controller 50 is used to control the warning device 80 to prompt that the screening device 20 needs to be repaired. Specifically, the warning device 80 may include, for example, one or more of a display, a warning light, and a sound device. The display, the warning light, and the sound device are respectively electrically connected to the controller 50. The display can display warning information under the control of the controller 50, such as prompting to repair the screening device 20, etc. The warning light and the sound device can display warning lights and emit alarm sounds under the control of the controller 50. Through the setting of the warning device 80, it is convenient to timely remind the staff to repair the screening device 20 and improve the production efficiency.

[0029] See Figure 3, the screening device 20 may be provided with a first screen 202 and a second screen 203 at intervals in the direction of gravity. For example, the mesh number of the first screen 202 is less than that of the second screen 203, and the mesh number of the inspection screen 421 is the same as that of the second screen 203. The first screen 202, the second screen 203, and the inspection screen 421 may be vibrating screens, for example. The mesh number of the first screen 202 may be 100, 150, or 200 meshes; the mesh number of the second screen 203 is 270, 300, or 325 meshes. Of course, this embodiment is not limited thereto. Specifically, the screening device 20 may further include a housing 201, a feed inlet 204, a first discharge outlet 205, a second discharge outlet 206, and a third discharge outlet 207. The first screen 202 and the second screen 203 may be disposed in the housing 201, for example. The first screen 202 is connected to the first discharge outlet 205, and the second screen 203 is connected to the second discharge outlet 206. The screening and metering feeder 10 conveys the material to the feed inlet 204, and the material is screened by the first screen 202 and the second screen 203. The coarse materials screened out on the first screen 202 and the second screen 203 are conveyed to the coarse material bucket 22 through the first discharge outlet 205 and the second discharge outlet 206. The screening device 20 conveys the screened material to the finished product buffer hopper 21 through the third discharge outlet 207. By providing the coarse material bucket 22, the coarse materials screened out on the first screen 202 and the second screen 203 can be removed in time, avoiding the influence of the coarse materials screened out on the first screen 202 and the second screen 203 on the next screening.

[0030] Refer again to Figure 1 and Figure 2 , the finished product buffer device may include at least two inspection tanks 30, for example. A switching valve is provided between the finished product buffer hopper 21 and the at least two inspection tanks 30. The number of inspection tanks 30 may be two, for example, or multiple, and can be set according to actual needs. The at least two inspection tanks 30 are used to alternately store the screened material under the control of the switching valve. The screening system may further include a temporary conveying pipeline 70, for example, which is connected between the inspection tank 30 and the screening device 20 and is used to convey the screened material in the inspection tank 30 to the screening device 20 for re-screening. When the screening detection device detects problems such as mesh leakage and breakage in the screening device 20, it means that there are large particle materials in the screened material obtained from this screening. Therefore, re-screening is required. After the screening device 20 is repaired, the screened material that needs to be re-screened can be conveyed to the screening device 20 for re-screening through the temporary conveying pipeline 70, for example, and the screened material obtained from the re-screening is stored in another inspection tank 30 through the switching valve.

[0031] To facilitate a clearer understanding of the screening system provided in this embodiment, the working process of the screening system provided in this embodiment will be illustrated by way of example below.

[0032] The screening system starts to work. For example, the finished product buffer device, the screening detection device, the screening device 20, and the screening metering feeder 10 can be started in sequence. When the screening device 20 can work normally, for example, when the second screen 203 is normal (not damaged), the materials entering the screening device 20 pass through the first screen 202 and the second screen 203 in sequence. Then, the coarse materials on the first screen 202 and the second screen 203 are discharged into the coarse material bucket 22 through the first discharge port 205 and the second discharge port 206. The screened materials passing through the second screen 203 are smoothly transported to the finished product buffer hopper 21 through the third discharge port 207 and then transported to the inspection tank 30.

[0033] In the embodiment as Figure 1 shown, the automatic sampler 41 regularly and automatically takes the screened materials after screening from the finished product buffer hopper 21 as samples and transports them to the inspection sieve 421. When the automatic sampler 41 starts, the detection device 42 is started simultaneously. After the inspection sieve 421 in the detection device 42 runs for a set time, the on-site staff observes whether there are residual materials on the sieve of the inspection sieve 421 through the visual window 422. When the staff sees that there are no residual materials on the inspection sieve 421, it means that the currently sampled materials are qualified, the second screen 203 of the screening device 20 is not damaged, and the production continues. After a waiting inspection tank 30 is full, it is switched to another waiting inspection tank 30 through the switching valve to continue storing the screened materials. On the contrary, when the staff sees that there are residual materials on the inspection sieve 421, it means that the currently sampled materials are unqualified and the second screen 203 of the screening device 20 has been damaged. In such a case, the staff presses the start-stop switch 60 on-site, and the controller 50 controls the screening metering feeder 10 to immediately stop transporting materials to the screening device 20. At the same time, the controller 50 generates an alarm signal through the warning device 80 to remind the relevant staff to process the second screen 203.

[0034] In the embodiment as Figure 2In the illustrated embodiment, the automatic sampler 41 periodically and automatically takes out the screened materials from the finished product buffer hopper 21 as samples, and conveys them to the inspection sieve 421. The detection device 42 is started simultaneously when the automatic sampler 41 is started, and the inspection sieve 421 in the detection device 42 operates for a set time. When there is no residual material on the inspection sieve 421, the material without material is conveyed to the weighing device 90, and the weight obtained by the weighing device 90 is 0. The weight is conveyed to the controller 50. After receiving the weight, the controller 50 compares it with the preset weight. If the weighing data value is less than the preset weight, it means that the currently sampled material is qualified, the second sieve 203 of the screening device 20 is not damaged, and the production continues. After a waiting inspection tank 30 is filled, it is switched to another waiting inspection tank 30 through the switching valve to continue storing the screened materials. On the contrary, when there is residual material on the inspection sieve 421, the residual material is conveyed to the weighing device 90, and the weight obtained by the weighing device 90 is conveyed to the controller 50. After receiving the weight, the controller 50 compares it with the preset weight. If the weighing data value is greater than the preset weight, it means that the currently sampled material is unqualified, and the second sieve 203 of the screening device 20 has been damaged. In such a case, the staff presses the start-stop switch 60 on-site, and the screening metering feeder 10 is immediately controlled by the controller 50 to stop conveying materials to the screening device 20. At the same time, the controller 50 generates an alarm signal through the warning device 80 to remind the relevant staff to process the second sieve 203.

[0035] After the fault repair (for example, after the screen replacement is completed), the switching valve can be rotated and switched to another waiting inspection tank 30, and the screened materials in the waiting inspection tank 30 storing the unqualified materials are conveyed to the screening device 20 through the temporary conveying pipeline 70 for re-screening. After the re-screening of the unqualified materials is completed, the screening metering feeder 10 is started to convey new materials for screening.

[0036] After the screening device 20 finishes screening, the automatic sampler 41 is started to take a sample once and convey it to the detection device 42 for detection. When it is found that the second sieve 203 of the screening device 20 is damaged, the screening and feeding are immediately stopped, and maintenance is carried out. When it is found that the screening device 20 has no mesh leakage or damage, the screening work continues. When one of the waiting inspection tanks 30 is filled with materials, the switching valve is switched to another waiting inspection tank 30 and the screening and loading start. At this time, the automatic sampler 41 can be started to take a sample once for detection. In this way, each waiting inspection tank 30 only needs to be detected once to determine whether the screened materials in the waiting inspection tank 30 are all qualified materials, saving the number of detections and improving the work efficiency.

[0037] The controller 50 can also calculate, for example, the cumulative operating time of each screening device 20. After reaching the set duration value, it can prompt to replace the sieve mesh through, for example, the warning device 80. After reaching the limit value, it will automatically prohibit the start of the screening device 20. After the screening device 20 is repaired, for example, after replacing the sieve mesh, the timer is reset and starts timing again.

[0038] In the screening system provided in this embodiment, through the setting of the screening detection device, the screened material after being screened by the screening device 20 can be sampled by the automatic sampler 41 and then inspected by the inspection sieve 421. The controller 50 can control the automatic sampler 41 to take samples, and the controller 50 can control the screening quantitative feeder 10 to stop working when there is residual material on the inspection sieve 421, so that during the production process of the negative electrode material, it is possible to timely detect the situation of the screening device 20 having a leaking or damaged sieve, and stop screening in time, and it can also prevent the screened material that does not meet the requirements from entering the finished product, causing adverse effects, and ensuring the high quality of the negative electrode material.

[0039] In addition, it can be understood that the foregoing various embodiments are only exemplary descriptions of the present invention. On the premise that the technical features do not conflict, the structure is not contradictory, and the invention purpose of the present invention is not violated, the technical solutions of the various embodiments can be arbitrarily combined and used.

[0040] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be in electrical, mechanical or other forms.

[0041] The unit described as a separated component may or may not be physically separated. The component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A screening system, characterized in that, Comprising: A screening and metering feeder; A screening device, which is connected with a finished product buffer hopper, and the screening device is used for screening the materials conveyed by the screening and metering feeder to obtain screened materials; A finished product caching device, connected to the finished product buffer hopper, and the finished product caching device is used for receiving and storing the screened materials conveyed by the finished product buffer hopper; A screening detection device, including an automatic sampler and a detection device, an inspection sieve is arranged in the detection device, the automatic sampler is used for taking a preset amount of the screened materials from the finished product buffer hopper and conveying them to the inspection sieve, and the inspection sieve is used for screening and inspecting the screened materials; And A controller, electrically connected to the screening and metering feeder and the automatic sampler, the controller is used for controlling the automatic sampler to take samples, and when there is residual material on the inspection sieve, controlling the screening and metering feeder to stop working.

2. The screening system according to claim 1, wherein A visual window is also correspondingly arranged on the detection device for the inspection sieve, and the visual window is used for observing whether there is residual material on the inspection sieve.

3. The screening system according to claim 2, characterized in that, Also comprising: A start-stop switch, electrically connected to the controller, and the start-stop switch is used for sending a start-stop signal to the controller in response to a user operation.

4. The screening system according to claim 1, wherein Also comprising: A weighing device, connected to the screening detection device, and the weighing device is electrically connected to the controller, the weighing device is used for weighing the weight of the residual material on the inspection sieve and transmitting the weight to the controller, and the controller is used for judging whether there is residual material on the inspection sieve according to the weight.

5. The screening system according to any one of claims 1-4, characterized in that, The screening device is provided with a first sieve mesh and a second sieve mesh at intervals along the gravity direction, and the mesh number of the first sieve mesh is smaller than that of the second sieve mesh, and the mesh number of the inspection sieve is the same as that of the second sieve mesh.

6. The screening system according to claim 5, wherein, The mesh number of the first sieve mesh is 100, 150 or 200 meshes; the mesh number of the second sieve mesh is 270, 300 or 325 meshes.

7. The screening system according to claim 2, characterized in that, The finished product caching device includes at least two inspection tanks, a switching valve is arranged between the finished product buffer hopper and at least two inspection tanks, and at least two inspection tanks are used for alternately storing the screened materials under the control of the switching valve.

8. The screening system according to claim 7, wherein Also comprising: A temporary conveying pipeline, connected between the inspection tank and the screening device, and used for conveying the screened materials in the inspection tank to the screening device for re-screening.

9. The screening system according to any one of claims 1-4, characterized in that, Also comprising: An early warning device, electrically connected to the controller, and the controller is used for controlling the early warning device to prompt that the screening device needs to be repaired.

10. The screening system according to claim 9, wherein The early warning device includes: A display, electrically connected to the controller, and the controller is used for controlling the display to display early warning information; and / or, An early warning lamp, electrically connected to the controller, and the controller is used for controlling the early warning lamp to give an early warning; and / or, A sound device, electrically connected to the controller, and the controller is used for controlling the sound device to give an early warning.

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