A flow-controllable premixed graphite powder feeding device
Patent Information
- Application Number
- CN202522089811.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-09-28
AI Technical Summary
[0003]传统的投料方式，如人工倾倒、螺旋给料机、星形给料阀等方式难以对石墨粉体的投料流量进行精确、稳定和连续的控制
通过设置并联的第一、第二进料口并配备高精度手动球阀，可分别精确控制不同粒径石墨粉体的初始给料量，为后续精确配比提供了基础。结合莲蓬状投料器中独特的可旋转进料转台与下料控制管结构，可实现投料间隙的无级调节，从而使得最终投料流量能进行精确、灵活地控制，极大满足了不同工艺配方对投料量与配比的苛刻要求；装置采用真空吸料方式，利用负压将粉料从混料组件快速输送至混合机，输送力强且高效。粉体在进入混合机前，先于混料仓内进行预混合，再通过莲蓬状投料器的多组投料点呈分散状投入混合机料床，有效避免了粉体集中下落造成的扬尘、分层或结团现象，显著提升了物料的混合均匀度，缩短了总混合时间，从而提高了整体生产效率；该装置集精确配料、预混合、可控投料、真空输送、有效密封与防护于一体，解决了石墨粉体及其他类似粉体材料在投料过程中存在的扬尘大、配比控制难、混合不均、效率低下等问题。
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Figure CN224762976U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of graphite powder feeding technology, and more specifically, to a premixed graphite powder feeding device with controllable flow rate. Background Technology
[0002] Graphite is chemically stable at room temperature and is insoluble in water, dilute acids, dilute alkalis, and organic solvents. It also has high-temperature resistance and electrical conductivity. Graphite powder can be used as a refractory material, conductive material, wear-resistant material, and lubricant. However, in specific applications, graphite powder often requires a specific range of physicochemical properties or the addition of other auxiliary powders. Therefore, the final stage of graphite powder production often involves mixing graphite powders with different properties in a certain proportion through stirring, so that the physicochemical properties of the mixed graphite powder meet the customer's requirements.
[0003] Traditional feeding methods, such as manual dumping, screw feeders, and star-shaped feed valves, struggle to accurately, stably, and continuously control the flow rate of graphite powder. Large flow rate fluctuations can lead to inaccurate proportions with other materials. Existing technologies typically employ a process of feeding materials separately first and then mixing them centrally. This method suffers from numerous mixing dead zones, long mixing times, and low efficiency, making it difficult to achieve instantaneous, initial-stage uniform premixing and increasing the load and energy consumption of subsequent mixing equipment. Utility Model Content
[0004] To overcome the shortcomings of the existing technology, this invention provides a premixed graphite powder feeding device with controllable flow rate. This device can adjust the flow rate according to the powder ratio, thereby ensuring effective mixing of graphite powders with different particle size characteristics. Simultaneously, it allows for flexible and timely adjustment of the feeding amount to meet diverse feeding requirements.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A flow-controllable premixed graphite powder feeding device is provided. The device is connected to the top of a mixer and includes a feeding pipe, a conveying pipe, a mixing component, a vacuum feeder, and a lotus-shaped feeder. The feeding pipe is connected to the mixing component, the vacuum feeder is connected to the mixing component, and the lotus-shaped feeder is located at the inner top of the mixer. The mixing component and the lotus-shaped feeder are connected by the conveying pipe.
[0006] The feeding pipe is connected to a first feed port and a second feed port, which are arranged in parallel.
[0007] Valves are installed on both the first and second feed inlets.
[0008] The valve includes a valve body, a sealing seat, and a handwheel. The sealing seat is fixedly mounted on the valve body, and the handwheel is mounted on the sealing seat for controlling the opening and closing of the valve body.
[0009] The mixing assembly includes a feed pipe, a discharge pipe, a mixing chamber, a filter chamber, and a suction and exhaust valve. One end of the feed pipe is connected to the feeding pipe, and the other end is connected to the mixing chamber. The filter chamber is connected to the top of the mixing chamber. The suction and exhaust valve is connected to the top of the filter chamber and is connected to the vacuum feeder. One end of the discharge pipe is connected to the suction and exhaust valve, and the other end is connected to the conveying pipe.
[0010] The lotus-shaped feeder includes a feeding turntable, feeding pipes, conical guides, and discharge control pipes. Multiple sets of feeding pipes are arranged inside the feeding turntable. Multiple sets of conical guides are provided at the top of the feeding pipes. A fixed platform is provided at the bottom of the feeding turntable. Multiple sets of discharge control pipes are arranged inside the fixed platform. The feeding turntable can rotate coaxially with respect to the fixed platform, and the discharge gap between the feeding pipes and the discharge control pipes is controlled by rotating several of them.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up parallel first and second feed inlets and equipping them with high-precision manual ball valves, the initial feed rate of graphite powders with different particle sizes can be precisely controlled, providing a foundation for subsequent precise proportioning. Combined with the unique rotatable feed turntable and discharge control pipe structure in the lotus-shaped feeder, stepless adjustment of the feeding gap can be achieved, allowing for precise and flexible control of the final feed flow rate. This greatly satisfies the stringent requirements of different process formulations regarding feed rate and proportion. The device adopts a vacuum suction method, using negative pressure to rapidly transport powder from the mixing components to the mixer, resulting in strong and efficient conveying force. Before entering the mixer, the powder is pre-mixed in the mixing hopper, and then dispersedly fed into the mixer bed through multiple feeding points of the lotus-shaped feeder. This effectively avoids dust, stratification, or clumping caused by concentrated powder falling, significantly improves the mixing uniformity of the material, shortens the total mixing time, and thus improves the overall production efficiency. This device integrates precise batching, pre-mixing, controllable feeding, vacuum conveying, and effective sealing and protection, solving the problems of high dust, difficulty in proportion control, uneven mixing, and low efficiency in the feeding process of graphite powder and other similar powder materials. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the lotus-shaped feeder in this utility model; Figure 3 This is a schematic diagram of the valve in this utility model; Figure 4 This is a schematic diagram of the feeding component in this utility model; In the diagram: 1 is the mixer, 2 is the feeding pipe, 3 is the conveying pipe, 4 is the first feed inlet, 5 is the second feed inlet, 6 is the valve, 7 is the valve body, 8 is the sealing seat, 9 is the handwheel, 10 is the mixing assembly, 11 is the feed pipe, 12 is the discharge pipe, 13 is the mixing bin, 14 is the filter bin, 15 is the suction and exhaust valve, 16 is the vacuum feeder, 17 is the lotus-shaped feeder, 18 is the feeding turntable, 19 is the feed pipe, 20 is the conical guide, and 21 is the discharge control pipe. Detailed Implementation
[0013] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0014] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.
[0015] like Figures 1 to 4 As shown, a flow-controllable premixed graphite powder feeding device is provided. This device is connected to the top of the mixer 1 via a flange seal. The feeding device includes a feeding pipe 2, a conveying pipe 3, a mixing component 10, a vacuum feeder 16, and a lotus-shaped feeder 17. The feeding pipe 2 is connected to the mixing component 10 via a threaded seal. The feeding pipe 2 is a seamless stainless steel pipe with a diameter of 80 mm and a wall thickness of 3 mm. The vacuum feeder 16 is a negative pressure suction device of model ZKS-1 with a rated suction capacity of 500 kg / h, and is connected to the mixing component 10 via a quick-connect coupling. The lotus-shaped feeder 17 is bolted to the inner top of the mixer 1, at a height of 1.2 m from the bottom of the mixer 1. The mixing component 10 and the lotus-shaped feeder 17 are connected by the conveying pipe 3, which is a food-grade silicone tube with a length of 2 m based on the equipment installation spacing and an inner diameter of 60 mm. Preferably, the feeding pipe 2 is connected to a first feed port 4 and a second feed port 5. The first feed port 4 and the second feed port 5 are arranged in parallel. The first feed port 4 is adapted to the discharge port of a natural graphite powder storage silo with a particle size of 100-200 mesh and has a diameter of 100 mm. The second feed port 5 is adapted to the discharge port of a synthetic graphite powder storage silo with a particle size of 300-500 mesh and also has a diameter of 100 mm. The distance between the two is 200 mm, and both are connected to the feeding pipe 2 through flanges. Preferably, valves 6 are provided on both the first feed port 4 and the second feed port 5. The valves 6 are DN100 type manual ball valves, which are suitable for solid powder, have a working temperature range of -20℃ to 80℃, and can withstand a maximum working pressure of 0.6MPa. Preferably, valve 6 includes valve body 7, sealing seat 8, and handwheel 9. Valve body 7 is made of cast steel, and its internal flow channel is straight-through to reduce powder retention. Sealing seat 8 is made of polytetrafluoroethylene (PTFE, a synthetic material with high and low temperature resistance and corrosion resistance) and is fixed to the valve core and valve body contact area of valve body 7 by internal hexagonal bolts. Handwheel 9 is injection molded from ABS engineering plastic, with a diameter of 120mm and anti-slip texture on the surface. It is mounted on sealing seat 8 via valve stem. Turning handwheel 9 drives valve core to rotate, thereby controlling the opening and closing of valve body 7. When valve core is fully open, the flow rate can reach 80m³ / s. 3 / h, with a leakage rate of less than 0.1ml / min when fully closed. Preferably, the mixing assembly 10 includes an inlet pipe 11, an outlet pipe 12, a mixing chamber 13, a filter chamber 14, and a suction and exhaust valve 15. One end of the inlet pipe 11 is connected to the feed pipe 2 via a reducing fitting, and its diameter is 80mm, matching the diameter of the feed pipe 2. The other end is connected to the mixing chamber 13 by welding. The mixing chamber 13 has a cylindrical structure with a volume of 100L, an inner diameter of 200mm, and a height of 320mm. The inner wall is polished, with a surface roughness Ra≤0.8μm to avoid graphite powder adhesion. The filter chamber 14 is a cylinder with a diameter of 150mm and a height of 200mm. The bottom is connected to the top of the mixing chamber 13 via a flange. The interior is equipped with a sintered stainless steel filter with a pore size of 5μm, which is used to filter impurities in the graphite powder and prevent the powder from entering the vacuum system. The suction and exhaust valve 15 is a pneumatic angle seat valve of model QJ-10 with a diameter of 60mm. It is connected to the top of the filter chamber 14 via a threaded connection. The suction and exhaust valve 15 is connected to the vacuum feeder 16 via a hose with an inner diameter of 60mm and a length of 1.5m. One end of the discharge pipe 12 is welded to the outlet end of the suction and exhaust valve 15 with a diameter of 60mm, and the other end is connected to the conveying pipe 3 via a quick connector. Preferably, the lotus-shaped feeder 17 includes a feeding turntable 18, a feeding pipe 19, a conical guide 20, and a discharge control pipe 21. The feeding turntable 18 is a circular platform with a diameter of 300mm, made of aluminum alloy. Eight sets of feeding pipes 11 are evenly arranged along the circumference inside the turntable. The diameter of each feeding pipe 11 is 20mm, and the distance between adjacent pipes is 30mm. The conical guide 20 is made of polycarbonate, with a cone angle of 60° and a height of 50mm. Eight sets of these guides are arranged at the top of the feeding pipe 19 corresponding to the positions of the feeding pipes 11, used to smoothly guide the powder conveyed by the feeding pipes 11 into the feeding pipe 19. The feeding pipe 19 is a stainless steel pipe with a diameter of 15mm and a length of 100mm, and it connects to the bottom of the conical guide 20. A fixed platform is provided at the bottom of the feeding turntable 18 via bearings. The fixed platform uses 4... Made of No. 5 steel, it is welded and fixed to the top of the mixer 1; the feeding control pipe 21 is a stainless steel pipe with a diameter of 18mm and a length of 80mm. There are 8 sets of these pipes arranged in the circumferential direction inside the fixed platform, corresponding to the position of the feeding pipe 19. The bottom of the feeding control pipe 21 extends to a distance of 300mm from the material surface inside the mixer 1; the feeding turntable 18 can be driven by manual or small servo motor to rotate coaxially relative to the fixed platform. By rotating the feeding turntable 18, the alignment between the feeding pipe 19 and the feeding control pipe 21 can be changed, thereby controlling the feeding gap between the two. For example, when the feeding pipe 19 and the feeding control pipe 21 are completely aligned, the feeding gap is 3mm and the flow rate can reach 50kg / h. When the two are rotated to the point where they are partially misaligned, the feeding gap can be adjusted to a minimum of 0.5mm and the flow rate drops to 5kg / h.
[0016] Confirm that mixer 1 is in standby mode, the pipeline is free from damage or blockage, and the feed inlet is sealed. According to the preset ratio, turn handwheel 9 on valve 6 to open the ball valve, and adjust valves 6 on the first feed inlet 4 and the second feed inlet 5 to their designed feed openings. Feeding Start: Confirm that the suction and exhaust valve 15 is open and the filter chamber 14 is unblocked, then start the vacuum feeder 16. The two types of graphite powder enter the feeding pipe 2 through the first feed inlet 4 and the second feed inlet 5, converge into the mixing chamber 13 for premixing, filter impurities, and then are sent to the lotus-shaped feeder 17 through the conveying pipe 3. Flow Control: Observe the material level in mixer 1, rotate the feed turntable 18 to adjust the gap between the feeding pipe 19 and the discharge control pipe 21, and fine-tune the valve 6 opening to calibrate the ratio. Feeding Finish: After the storage silo is empty, wait for the indicator light on the vacuum feeder 16 to show "no load," close the feed inlet valve 6, then stop the vacuum feeder 16. After the remaining powder has fallen off, close the suction and exhaust valve 15.
[0017] The above description only details the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.
Claims
1. A flow-controllable premixed graphite powder feeding device, the device being connected to the top of a mixer (1), characterized in that: The mixer includes a feeding pipe (2), a conveying pipe (3), a mixing assembly (10), a vacuum feeder (16), and a lotus-shaped feeder (17). The feeding pipe (2) is connected to the mixing assembly (10), the vacuum feeder (16) is connected to the mixing assembly (10), and the lotus-shaped feeder (17) is located at the top inside the mixer (1). The mixing assembly (10) and the lotus-shaped feeder (17) are connected by the conveying pipe (3).
2. The flow-controllable premixed graphite powder feeding device according to claim 1, characterized in that: The feeding pipe (2) is connected to a first feed port (4) and a second feed port (5), and the first feed port (4) and the second feed port (5) are arranged in parallel.
3. The flow-controllable premixed graphite powder feeding device according to claim 2, characterized in that: Valves (6) are provided on both the first feed port (4) and the second feed port (5).
4. The flow-controllable premixed graphite powder feeding device according to claim 3, characterized in that: The valve (6) includes a valve body (7), a sealing seat (8) and a handwheel (9). The sealing seat (8) is fixedly mounted on the valve body (7), and the handwheel (9) is mounted on the sealing seat (8) to control the opening and closing of the valve body (7).
5. The flow-controllable premixed graphite powder feeding device according to claim 1, characterized in that: The mixing assembly (10) includes a feed pipe (11), a discharge pipe (12), a mixing chamber (13), a filter chamber (14), and a suction and exhaust valve (15). One end of the feed pipe (11) is connected to the feeding pipe (2), and the other end is connected to the mixing chamber (13). The filter chamber (14) is connected to the top of the mixing chamber (13). The suction and exhaust valve (15) is connected to the top of the filter chamber (14) and is connected to the vacuum feeder (16). One end of the discharge pipe (12) is connected to the suction and exhaust valve (15), and the other end is connected to the conveying pipe (3).
6. The flow-controllable premixed graphite powder feeding device according to claim 1, characterized in that: The lotus-shaped feeder (17) includes a feeding turntable (18), a feeding pipe (19), a conical guide (20), and a discharge control pipe (21). The feeding turntable (18) has multiple sets of feeding pipes (11). The conical guide (20) is provided at the top of the feeding pipe (19). The feeding turntable (18) has a fixed platform at the bottom. The discharge control pipe (21) is arranged in multiple sets within the fixed platform. The feeding turntable (18) can rotate coaxially with respect to the fixed platform. The discharge gap between the feeding pipes (19) and the discharge control pipes (21) is controlled by rotating several feeding pipes (19).