Powder mixing equipment
By introducing a weighing instrument and a multi-pipeline mixing system with an umbrella-shaped baffle design into the powder mixing equipment, combined with air blowing and gas-solid separation devices, the problems of consistency and dust management in the powder mixing equipment are solved, and efficient and stable powder production is achieved.
Patent Information
- Application Number
- CN202423269192.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing powder mixing equipment suffers from poor product consistency, difficulty in dust management, and inability to monitor screening effects online when mixing and packaging powders, resulting in high error rates and high defect rates in the production process.
The powder mixing equipment includes a mixing tank and a fluidized powder feeding device. The feed weight is monitored in real time by a weighing instrument. The mixing efficiency is improved by using an umbrella-shaped baffle and a multi-pipeline design. Combined with an air blowing mechanism and a gas-solid separation device, online monitoring and efficient mixing are achieved.
It improves the uniformity of powder mixing and product quality, reduces dust pollution, enables real-time monitoring of the grading screen and stability of the production process, and enhances product consistency and production efficiency.
Smart Images
Figure CN223716861U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery production technical field especially relates to a powder mixing equipment. BACKGROUND
[0002] The powder mixing equipment is a kind of machine equipment for mixing multiple powder materials, and is widely used in multiple industries.The main function is to uniformly mix powder raw materials of different components to meet production needs.
[0003] In the production process of battery, the mixing process has more than 30% influence on the quality of product in the whole production process of lithium ion battery, and is the most important link in the whole production process.For example, the mixing of positive and negative electrode slurry of lithium ion battery, the mixing of graphite powder, and the mixing of positive material and its coating layer, solid electrolyte and conductive agent, all need to use powder mixing equipment.The existing powder mixing equipment mixes and packs powder, the powder is screened by grading screen, then enters the mixing equipment for mixing, due to the difference in equipment performance and the different degree of wear of grading screen, the specifications of powder raw materials obtained by each grading screen are slightly different, and finally the consistency of products obtained by each mixing equipment is poor, which is not conducive to production management.And after mixing, the powder is packed manually, the dust at discharge port is large, and the management difficulty is large;At the same time, the screening effect of grading screen cannot be monitored online, the fault tolerance of production process is low, and the unqualified rate and scrap rate of product are high.
[0004] Therefore, it is urgent to provide a new type of powder mixing equipment to solve the above technical problems in the prior art. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a kind of powder mixing equipment, can monitor the feed weight of powder raw material in powder mixing equipment in real time, and mixing effect is better, product uniformity is higher, can improve the product quality of obtained powder.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] The powder mixing equipment includes mixing tank and at least three fluidized powder feeding devices, the fluidized powder feeding device includes buffer bin and conveying pipeline, the buffer bin is provided with weighing instrument, and the feeding port of the conveying pipeline is communicated with the buffer bin;The discharge port of the conveying pipeline is communicated with the mixing tank, one of the conveying pipelines is a first pipeline, the discharge port of the first pipeline is provided with umbrella-shaped baffle with downward opening, and the discharge ports of the other conveying pipelines are uniformly distributed below the umbrella-shaped baffle and are provided with upward opening towards the umbrella-shaped baffle.
[0008] Optionally, the powder fluidization feeding device further comprises a blowing mechanism for blowing compressed air into the conveying pipeline.
[0009] Optionally, a negative pressure exhaust pipe is arranged on the top of the mixing tank and is further connected to a dust collecting device.
[0010] Optionally, a gas-solid separation device is arranged on the inner top of the mixing tank.
[0011] Optionally, the discharge port of the second pipeline is arranged to be inclined so as to face the discharge port of the first pipeline.
[0012] Optionally, the projection of the umbrella-shaped baffle in the vertical direction can cover at least the discharge port of the second pipeline.
[0013] Optionally, the bottom of the mixing tank comprises a conical discharge section, and the inner diameter of the conical discharge section gradually decreases from top to bottom in the vertical direction.
[0014] Optionally, the bottom of the conical discharge section is provided with a star feeder for conveying the mixed powder to a packaging device.
[0015] Optionally, the upper portion of the buffer bin is provided with a grading screen for conveying the powder raw material to the buffer bin.
[0016] Optionally, the weighing instrument is communicatively connected to a controller for recording the weight of the powder raw material in each buffer bin.
[0017] Beneficial effects:
[0018] The powder mixing device temporarily stores the powder raw material in the buffer bin, and then conveys the powder raw material to the mixing tank through the conveying pipeline after weighing by the weighing instrument. In the mixing tank, one of the conveying pipelines is the first pipeline, and the discharge port of the first pipeline is provided with an umbrella-shaped baffle. The other conveying pipelines are the second pipelines, and the discharge ports of the second pipelines are arranged below the umbrella-shaped baffle and are arranged upward. After the powder raw material in the second pipeline is discharged from the discharge port, it moves upward and mixes with the powder raw material from the first pipeline under the umbrella-shaped baffle with the opening facing downward. The mixing efficiency and quality are improved, and the powder particles can be prevented from moving upward along the airflow line, thereby playing a blocking role. The powder mixing device can monitor the feeding weight of the powder raw material in the powder mixing device in real time, has better mixing effect, and mixes the powder raw material in multiple conveying pipelines in one mixing tank, so that the uniformity of the obtained product is higher, and the product quality of the obtained powder is improved. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1is a schematic view of the powder mixing equipment provided by the embodiment of the utility model.
[0020] Figure 2 is a schematic view of the mixing tank provided by the embodiment of the utility model.
[0021] In the drawing:
[0022] 100, fluidized powder feeding device; 101, first pipeline; 102, umbrella-shaped baffle; 103, second pipeline; 110, buffer bin; 111, conveying pipeline; 112, weighing instrument; 120, blowing mechanism; 130, grading screen;
[0023] 200, mixing tank; 201, conical discharging section; 210, gas-solid separation device; 211, negative pressure air extraction pipe; 220, star-shaped feeder;
[0024] 300, packaging equipment; 310, carrier vehicle. EMBODIMENT
[0025] The utility model will be further explained in detail in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all the structures.
[0026] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0027] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0028] In the description of the present embodiment, the terms "upper", "lower", "right", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.
[0029] As shown in Figure 1 and Figure 2 The powder mixing device comprises a mixing tank 200 and at least three fluidized powder feeding devices 100, the fluidized powder feeding device 100 comprises a buffer bin 110 and a conveying pipeline 111, the buffer bin 110 is provided with a weighing instrument 112, and the feeding port of the conveying pipeline 111 is communicated with the buffer bin 110; the discharging port of the conveying pipeline 111 is communicated with the mixing tank 200, one of the conveying pipelines 111 is a first pipeline 101, the discharging port of the first pipeline 101 is provided with an umbrella-shaped baffle 102 with an opening facing downward, and the other conveying pipelines 111 are second pipelines 103, the discharging ports of the second pipelines 103 are uniformly distributed in the circumferential direction below the umbrella-shaped baffle 102 and are arranged with openings facing the umbrella-shaped baffle 102.
[0030] The powder mixing device in the present embodiment temporarily stores the powder raw materials in the buffer bin 110, and after being weighed by the weighing instrument 112, the powder raw materials are conveyed by the conveying pipeline 111 into the mixing tank 200, in which one of the conveying pipelines 111 is the first pipeline 101, the discharging port of the first pipeline 101 is provided with the umbrella-shaped baffle 102, and the other conveying pipelines 111 are the second pipelines 103, the discharging ports of the second pipelines 103 are arranged below the umbrella-shaped baffle 102 and face upward, the powder raw materials in the second pipelines 103 move upward after being discharged from the discharging ports, and mix with the powder raw materials from the discharging port of the first pipeline 101 under the surrounding of the umbrella-shaped baffle 102 with the opening facing downward, thereby improving the mixing efficiency and mixing quality, and also avoiding the powder particles moving upward along the airflow line, thereby playing a blocking role. The powder mixing device can monitor the feeding weight of the powder raw materials in the powder mixing device in real time, the mixing effect is better, the powder raw materials in the multiple conveying pipelines 111 are mixed in one mixing tank 200, the uniformity of the obtained product is higher, and the product quality of the obtained powder can be improved.
[0031] Further, the fluidized powder feeding device 100 further comprises a blowing mechanism 120, which is used to blow compressed air into the conveying pipeline 111. The blowing mechanism 120 specifically compresses air by a compressor, and blows the compressed air into the conveying pipeline 111 to fluidize the powder in the conveying pipeline 111 and then blow the powder into the mixing tank 200 to perform mixing.
[0032] Specifically, the top of the mixing tank 200 is communicated with a negative pressure air extraction pipe 211, which is further communicated with a dust collecting device. The negative pressure air extraction pipe 211 can cooperate with the blowing mechanism 120 to transport the powder raw material into the mixing tank 200, and the negative pressure air extraction pipe 211 is communicated with the dust collecting device, so that part of the powder raw material mixed in the mixing tank 200 can be collected to avoid blocking the negative pressure air extraction pipe 211 and to avoid polluting the external atmosphere.
[0033] As a preferred embodiment, the inside top of the mixing tank 200 is provided with a gas-solid separation device 210. The gas-solid separation device can separate the powder in the air before the negative pressure air extraction pipe 211 to avoid blocking the negative pressure air extraction pipe 211. Specifically, the drumming powder device comprises a plurality of dust bags, and the surface of the dust bag is provided with a filter screen to filter the solid powder.
[0034] Please continue to refer to Figure 1 and Figure 2 Optionally, the bottom of the mixing tank 200 comprises a conical discharge section 201, and the inner diameter of the conical discharge section 201 gradually decreases from top to bottom in the vertical direction. The conical discharge section 201 can be arranged to move along the inner wall of the conical discharge section 201 during the downward movement after the powder raw material is mixed, so as to quickly gather and collect, thereby improving the discharge efficiency.
[0035] In this embodiment, the bottom of the conical discharge section 201 is provided with a star feeder 220, which is used to convey the mixed powder to a packaging device 300. The star feeder 220, also known as a rotary valve, a dust discharging valve or a airlock, adopts the advantages of advanced discharging, is a uniform and continuous feeding, conveying and discharging equipment in a mechanized and automatic control system, has the characteristics of small size, light weight, high production capacity, easy maintenance and operation, and is suitable for various loose and non-sticky dry materials.
[0036] Further, the mixed powder is discharged from the star feeder 220 and conveyed to the packaging device 300, and the automatic packaging of the powder is completed in the packaging device 300. The packaged powder falls into a carrier 310, and the carrier 310 conveys the packaged powder to the next production station or transports the packaged powder to a storage warehouse for storage, which will not be described here.
[0037] Optionally, a classification screen 130 is arranged above the buffer bin 110, and the classification screen 130 is used to deliver the powder raw material to the buffer bin 110. The classification screen 130 is also called a classification vibrating screen, which is widely used in the industrial field for classification and screening of solid particles. It can separate the powder according to the size by vibration to meet the needs of different size materials. The working mode of the classification screen 130 is to make the screen box vibrate by the exciting force generated by the exciting motor. The material enters the screen box through the feed port, and under the action of the vibration force, the material is gradually layered on the screen surface. The finer material passes through the screen hole and falls into the discharge port below, while the coarser material is blocked in the upper layer and moves forward along the screen surface. By adjusting the screen hole size and vibration parameters, the classification and screening effect of different particle size materials can be achieved.
[0038] As a preferred embodiment, the weighing instrument 112 is communicatively connected to a controller, and the controller is used to record the weight of the powder raw material in each buffer bin 110. Since the working state and screen mesh loss of each classification screen 130 are different, the quality of the powder raw material discharged from the classification screen 130 is slightly different. Therefore, the weight of the powder obtained from each classification screen 130 is obtained by using the weighing instrument 112, and the controller is used to record and judge the working state of the classification screen 130 and trace the production data of the classification screen 130 in real time.
[0039] Please continue to refer to Figure 2 The discharge port of the second pipeline 103 is inclined to face the discharge port of the first pipeline 101. Since the discharge port of the second pipeline 103 is inclined and faces the discharge port of the first pipeline 101, the powder discharged from the second pipeline 103 can move in the direction of the powder discharged from the first pipeline 101, and the two kinds of powder can be mixed by collision, thereby improving the mixing efficiency and uniformity and improving the quality of the final powder product.
[0040] Further, the projection of the umbrella-shaped baffle 102 in the vertical direction can cover the discharge port of the second pipeline 103. Since the projection of the umbrella-shaped baffle 102 in the vertical direction can cover the discharge port of the second pipeline 103, the powder raw material discharged from the second pipeline 103 can be surrounded and contained by the umbrella-shaped baffle 102, so that the airflow carrying multiple streams of powder raw material can be mixed inside the umbrella-shaped baffle 102, thereby improving the mixing efficiency and uniformity.
[0041] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.
Claims
1. A powder mixing apparatus, characterized by, The application relates to a powder feeding device. The powder feeding device comprises at least three powder fluidization feeding devices (100), each of which comprises a buffer bin (110) provided with a weighing instrument (112) and a conveying pipeline (111) with an inlet connected to the buffer bin (110). The conveying pipeline (111) of one of the powder fluidization feeding devices (100) is a first pipeline (101) with an outlet provided with a downward-opening umbrella-shaped baffle (102), and the conveying pipelines (111) of the other powder fluidization feeding devices (100) are second pipelines (103) with outlets uniformly distributed around the umbrella-shaped baffle (102) and opening towards the umbrella-shaped baffle (102).
2. The powder mixing apparatus of claim 1, wherein, The powder fluidization feeding device (100) further comprises a blowing mechanism (120) for blowing compressed air into the conveying pipeline (111).
3. The powder mixing apparatus of claim 2, wherein, The top of the mixing tank (200) is connected to a negative pressure air extraction pipeline (211) which is further connected to a dust collecting device.
4. The powder mixing apparatus of claim 3, wherein, The inside top of the mixing tank (200) is provided with a gas-solid separation device (210).
5. The powder mixing apparatus of claim 1, wherein, The outlet of the second pipeline (103) is inclined so that the outlet of the second pipeline (103) is directly opposite the outlet of the first pipeline (101).
6. The powder mixing apparatus of claim 5, wherein, The projection of the umbrella-shaped baffle (102) in the vertical direction can cover the outlets of the second pipelines (103).
7. The powder mixing apparatus of claim 1, wherein The bottom of the mixing tank (200) comprises a conical outlet section (201) with a gradually decreasing inner diameter from top to bottom in the vertical direction.
8. The powder mixing apparatus of claim 7, wherein, The bottom of the conical outlet section (201) is provided with a star-shaped feeder (220) for feeding the mixed powder to a packaging device (300).
9. A powder mixing apparatus according to any one of claims 1-8, wherein, The top of the buffer bin (110) is provided with a grading sieve (130) for feeding powder raw materials to the buffer bin (110).
10. A powder mixing apparatus according to any one of claims 1 to 8, wherein The weighing instrument (112) is communicatively connected to a controller for recording the weight of the powder raw materials in each buffer bin (110).