Automatic powder feeding device
Patent Information
- Application Number
- CN202522214286.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-10-20
AI Technical Summary
[0002]在工业生产过程中，粉体物料是十分常见的物料，其在工业生产过程中一般通过三种方式进行加料，一是人工拆包投料，工人手动割袋倾倒，粉尘污染严重，危害健康且效率低；二是半自动设备拆包投料，如简易割刀机配合输送带，仍需人工上袋，且残留率高（＞5%），无封闭除尘设计；三是集成度低的自动化设备拆包投料，拆包与投加系统分离，需多次中转，液位控制采用浮球阀，粉末粘稠时失效导致溢槽，无自适应包装尺寸功能，更换袋型需停机调整
本实用新型通过设有起重吊装系统、拆包系统、输送计量系统和投加系统，使本实用新型可以实现零粉尘泄露，通过全封闭拆包和布袋加脉冲双重除尘实现，提升了投加精度，通过计量称重装置和控制柜闭环控制实现，误差≤2%，增加了设备兼容性，可调式吊装支架12和双刃割刀22支持50-1000kg袋型无缝切换，具备防堵破拱设计，通过料仓破拱振动器运行实现，使得本实用新型的实际使用效果较好。
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Figure CN224646193U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automated processing technology for industrial powder materials, and more specifically, to an automatic powder feeding device. Background Technology
[0002] In industrial production, powder materials are very common. They are generally fed in three ways: First, manual unpacking and feeding, where workers manually cut bags and empty them, resulting in serious dust pollution, health hazards, and low efficiency; second, semi-automatic equipment unpacking and feeding, such as simple cutters with conveyor belts, which still require manual bag loading, have a high residue rate (>5%), and lack a closed dust collection design; third, low-integration automated equipment unpacking and feeding, where the unpacking and feeding systems are separate, requiring multiple transfers, and the level control uses float valves, which fail when the powder is viscous, causing overflow, lacking adaptive packaging size function, and requiring machine shutdown for adjustment when changing bag types.
[0003] Therefore, there is an urgent need for an automatic powder dispensing device to solve the above problems. Utility Model Content
[0004] To overcome the aforementioned deficiencies of the prior art, embodiments of this utility model provide an automatic powder dispensing device. By incorporating a lifting and hoisting system, an unpacking system, a conveying and metering system, and a dispensing system, this utility model achieves zero dust leakage. This is achieved through fully enclosed unpacking and dual dust removal via bag filter and pulse jet, improving dispensing accuracy. Closed-loop control via a metering and weighing device and control cabinet ensures an error of ≤2%, increasing equipment compatibility. The adjustable hoisting bracket 12 and double-edged cutter 22 support seamless switching between 50-1000kg bag types. It features an anti-blocking and anti-arching design, achieved through the operation of a hopper anti-arching vibrator, resulting in better practical performance and addressing the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic powder dispensing device, comprising a lifting and hoisting system, an unpacking system on one side of the lifting and hoisting system, a conveying and metering system on one side of the unpacking system, and a dispensing system on one side of the conveying and metering system; The lifting and hoisting system includes a load-bearing frame, a single-beam crane is installed on the top and bottom sides of the load-bearing frame, and an adjustable hoisting bracket is installed at the bottom of the single-beam crane. The unpacking system includes an unpacking system frame, a double-edged cutter located on the inner bottom of the frame, a conical hopper located at the bottom of the cutter, a top door opening and closing system located on the inner top of the frame, a hopper main door opening and closing system located at the bottom of the top door opening and closing system, a pneumatic bag knocker located on one side of the hopper main door opening and closing system, the pneumatic bag knocker located in the middle of the frame, a dust collector fan fixedly installed on one side of the top of the frame, a high-pressure pulse valve group located at the bottom of the fan, a bag filter compartment located at the bottom of the pulse valve group, a hopper arch-breaking vibrator fixedly installed on the front bottom of the conical hopper, rotary paddle level gauges fixedly installed on both sides of the bottom of the hopper, and a feeding butterfly valve fixedly installed at the bottom of the hopper. The top door opening and closing system includes a cylinder bracket 1, a cylinder 1 is fixedly installed on the top of the cylinder bracket 1, a bag flapper is fixedly installed at the end of the output shaft of the cylinder 1, and a cylinder bracket 2 is provided at the bottom of the bag flapper. The silo main gate opening and closing system includes a main gate cylinder bracket, which is fixedly installed on the unpacking system frame. A second cylinder is fixedly installed at the bottom of the main gate cylinder bracket, and a door leaf connecting bracket is fixedly installed at the end of the output shaft of the second cylinder. A silo door leaf is fixedly installed at the end of the door leaf connecting bracket. The conveying and metering system includes a variable frequency screw conveyor, with a metering and weighing device installed at the top and bottom of the variable frequency screw conveyor, and a variable frequency screw feeder installed at the bottom of the metering and weighing device. The dosing system includes a solution tank, a stirrer is installed on the solution tank, a dosing device is installed on one side of the solution tank, and a dosing control cabinet is installed on one side of the dosing device. The dosing equipment includes an alum-adding frame, multiple tees, and multiple double-handled ball valves. Two metering pumps are fixedly installed on the front side of the alum-adding frame. A Y-type filter is installed on one side of the bottom of the alum-adding frame. A union is fixedly installed on the rear side of the metering pumps. Reducers are installed on the top of the union and the bottom of the metering pumps via pipes. A second union is installed on the top of the reducers via a pipe. A pulse damper is installed on the top of the second union via a pipe. A frame-type PVC pipe assembly is installed on one side of the Y-type filter via a pipe. Two safety valves are fixedly installed on both sides of the PVC pipe assembly. Pipe flow meters are installed at the bottom of the two safety valves at the top. Elbows are fixedly installed at the corners of the frame-type PVC pipe assembly. An automatic air inlet and outlet valve is installed on the top of the frame-type PVC pipe assembly via a tee. A pressure gauge is installed in the middle of the frame-type PVC pipe assembly via a tee. A pressure gauge is also installed on the top of the pulse damper. A special-shaped tee is installed at the bottom of the safety valve at the bottom. A double-handled ball valve is installed on the rear side of the special-shaped tee via a pipe.
[0006] In a preferred embodiment, the output end of the single-girder crane is connected to the adjustable hoisting bracket, and the output shaft of the cylinder is connected to the bag-beating device.
[0007] In a preferred embodiment, the door leaf connecting bracket is driven by the output shaft of cylinder two.
[0008] In a preferred embodiment, the conduit between the pulse damper and the corresponding metering pump is connected to a frame-type PVC pipe assembly via a tee and a pipe.
[0009] In a preferred embodiment, the irregular tee is installed on a frame-type PVC pipe assembly.
[0010] In a preferred embodiment, a plurality of the dual-ruler ball valves are respectively installed on the pipe between the Y-type filter and the frame-type PVC pipe assembly, on both sides and the bottom of the frame-type PVC pipe assembly, on one end of the pipe behind the dual-ruler ball valve, and on the inner side of the middle part of the frame-type PVC pipe assembly.
[0011] In a preferred embodiment, a double-handled ball valve on the inner side of the frame-type PVC pipe assembly is connected to the frame-type PVC pipe assembly via a pipe and a tee.
[0012] The technical effects and advantages of this utility model are as follows: This utility model, by incorporating a lifting and hoisting system, a unpacking system, a conveying and metering system, and a dosing system, achieves zero dust leakage. It improves dosing accuracy through fully enclosed unpacking and dual dust removal via bag filters and pulse jets. The error is ≤2% achieved through a metering and weighing device and closed-loop control cabinet, increasing equipment compatibility. The adjustable hoisting bracket 12 and double-edged cutter 22 support seamless switching between 50-1000kg bag types. It features an anti-blocking and anti-arching design, achieved through the operation of a hopper anti-arching vibrator, resulting in excellent practical performance. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0014] Figure 2 This is a schematic diagram of the lifting and hoisting system of this utility model.
[0015] Figure 3 This is a schematic diagram of the unpacking system of this utility model.
[0016] Figure 4 This is a schematic diagram of the cylinder bracket of this utility model.
[0017] Figure 5 This is a schematic diagram of the bag-tapping device of this utility model.
[0018] Figure 6 This is a schematic diagram of the main cylinder support structure of this utility model.
[0019] Figure 7 This is a schematic diagram of the conveying and metering system of this utility model.
[0020] Figure 8 This is a schematic diagram of the dosing system structure of this utility model.
[0021] Figure 9 This is a schematic diagram of the alum-added frame structure of this utility model.
[0022] Figure 10 This is a side view of the alum-added frame structure of this utility model.
[0023] Figure 11 This is a schematic diagram of the system of this utility model.
[0024] The attached diagrams are labeled as follows: 1. Lifting and hoisting system; 11. Load-bearing frame; 12. Adjustable hoisting bracket; 13. Single-girder crane; 2. Unpacking system; 21. Unpacking system frame; 22. Double-edged cutter; 23. Conical hopper; 24. Top door opening and closing system; 241. Cylinder bracket one; 242. Cylinder one; 243. Bag beater; 244. Cylinder bracket two; 25. Silo main door opening and closing system; 251. Main door cylinder bracket; 252. Cylinder two; 253. Door leaf connecting bracket; 254. Silo door leaf; 26. Pneumatic bag beater; 27. Dust collector fan; 28. High-pressure pulse valve assembly; 29. Bag filter bin; 210. Silo arch-breaking vibrator; 211. Rotary paddle level gauge; 212. Feeding butterfly valve; 3 31. Conveying and metering system; 32. Variable frequency screw conveyor; 33. Metering and weighing device; 4. Variable frequency screw feeder; 5. Dosing system; 41. Solution tank; 42. Agitator; 43. Dosing equipment; 431. Alum dosing frame; 432. Metering pump; 433. Y-type filter; 434. Safety valve; 435. Pipeline flow meter; 436. Tee; 437. Automatic air inlet and outlet valve; 438. Union joint one; 439. Elbow; 4311. Double union ball valve one; 4314. Frame-type PVC pipe assembly; 4315. Pressure gauge; 4317. Reducer; 4318. Union joint two; 4319. Pulse damper; 4322. Special-shaped tee; 4323. Double union ball valve two; 44. Dosing control cabinet. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] As attached Figure 1-11 As shown, this utility model provides an automatic powder feeding device, including a lifting and hoisting system 1, an unpacking system 2 on one side of the lifting and hoisting system 1, a conveying and metering system 3 on one side of the unpacking system 2, and a feeding system 4 on one side of the conveying and metering system 3. The lifting and hoisting system 1 includes a load-bearing frame 11, a single-beam crane 13 is provided on the top and bottom sides of the load-bearing frame 11, and an adjustable hoisting bracket 12 is provided at the bottom of the single-beam crane 13. The unpacking system 2 includes an unpacking system frame 21. A double-edged cutter 22 is provided on the inner bottom side of the unpacking system frame 21. A conical hopper 23 is provided at the bottom of the double-edged cutter 22. A top door opening and closing system 24 is provided on the inner top side of the unpacking system frame 21. A hopper main door opening and closing system 25 is provided at the bottom of the top door opening and closing system 24. A pneumatic bag knocker 26 is provided on one side of the hopper main door opening and closing system 25. The pneumatic bag knocker 26 is located within the unpacking system frame. In the middle of the frame 21, a dust removal fan 27 is fixedly installed on one side of the top of the unpacking system frame 21. A high-pressure pulse valve group 28 is provided at the bottom of the dust removal fan 27. A bag filter chamber 29 is provided at the bottom of the high-pressure pulse valve group 28. A hopper arch-breaking vibrator 210 is fixedly installed on the front side of the bottom of the conical hopper 23. Rotary paddle level gauges 211 are fixedly installed on both sides of the bottom of the conical hopper 23. A feeding butterfly valve 212 is fixedly installed at the bottom end of the conical hopper 23. The top door opening and closing system 24 includes a cylinder bracket 241, a cylinder 242 is fixedly installed on the top of the cylinder bracket 241, a bag flapper 243 is fixedly installed at the end of the output shaft of the cylinder 242, and a cylinder bracket 244 is provided at the bottom of the bag flapper 243. The silo main gate opening and closing system 25 includes a main gate cylinder bracket 251, which is fixedly installed on the unpacking system frame 21. A second cylinder 252 is fixedly installed at the bottom of the main gate cylinder bracket 251. A door leaf connecting bracket 253 is fixedly installed at the end of the output shaft of the second cylinder 252. A silo door leaf 254 is fixedly installed at the end of the door leaf connecting bracket 253. The conveying and metering system 3 includes a variable frequency screw conveyor 31, a metering and weighing device 32 is provided at the top and bottom of the variable frequency screw conveyor 31, and a variable frequency screw feeder 33 is provided at the bottom of the metering and weighing device 32. The dosing system 4 includes a solution tank 41, a stirrer 42 is provided on the solution tank 41, a dosing device 43 is provided on one side of the solution tank 41, and a dosing control cabinet 44 is provided on one side of the dosing device 43. The dosing equipment 43 includes an alum-adding frame 431, multiple tees 436, and multiple double-union ball valves 4311. Two metering pumps 432 are fixedly installed on the front side of the alum-adding frame 431. A Y-type filter 433 is installed on one side of the bottom of the alum-adding frame 431. A union 438 is fixedly installed on the rear side of the metering pumps 432. Reducers 4317 are installed on the top of the union 438 and the bottom of the metering pumps 432 via pipes. A second union 4318 is installed on the top of the reducer 4317 via a pipe. A pulse damper 4319 is installed on the top of the second union 4318 via a pipe. A frame-type PVC pipe assembly 4314 is installed on one side of the Y-type filter 433 via a pipe. Two safety valves 434 are fixedly installed on both sides of the C-type PVC pipe assembly 4314. A pipe flow meter 435 is installed at the bottom of the two safety valves 434 located at the top. An elbow 439 is fixedly installed at the corner of the frame-type PVC pipe assembly 4314. An automatic air intake and exhaust valve 437 is installed at the top of the frame-type PVC pipe assembly 4314 through a tee 436. A pressure gauge 4315 is installed in the middle of the frame-type PVC pipe assembly 4314 through a tee 436. A pressure gauge 4315 is also installed at the top of the pulse damper 4319. A special-shaped tee 4322 is installed at the bottom of the safety valve 434 located at the bottom. A double-ruling ball valve 4323 is installed on the rear side of the special-shaped tee 4322 through a pipe.
[0027] The output end of the single-girder crane 13 is connected to the adjustable hoisting bracket 12 via a transmission, and the output shaft of the cylinder 242 is connected to the bag-beating device 243 via a transmission.
[0028] The door leaf connecting bracket 253 is connected to the output shaft of cylinder 252 via a transmission.
[0029] The pipe between the pulse damper 4319 and the corresponding metering pump 432 is connected to the frame-type PVC pipe assembly 4314 via a tee 436 and a pipe.
[0030] The irregular tee 4322 is installed on the frame-type PVC pipe assembly 4314.
[0031] Multiple dual-ruler ball valves 4311 are respectively installed on the pipe between the Y-type filter 433 and the frame-type PVC pipe assembly 4314, on both sides and bottom of the frame-type PVC pipe assembly 4314, on one end of the pipe behind the dual-ruler ball valve 4323, and on the inner side of the middle part of the frame-type PVC pipe assembly 4314.
[0032] The double-ruling ball valve 4311 on the inner side of the middle of the frame-type PVC pipe assembly 4314 is connected to the frame-type PVC pipe assembly 4314 through a pipe and a tee 436.
[0033] The specific implementation method is as follows: When using this utility model, an external conveyor belt transports 50kg-1000kg bagged powder raw materials to the bottom of a single-girder crane 13, then fixes them through an adjustable lifting bracket 12, and then lifts them through the single-girder crane 13 and sends them to the unpacking system 2. When the bagged powder raw materials reach the unpacking system 2, the dust removal fan 27, the high-pressure pulse valve group 28, and the bag filter chamber 29 work together to perform dust removal treatment, achieving zero dust leakage. The double-edged cutter cuts open the bottom of the bag, and the powder falls into the conical hopper 23. The pneumatic bag beater 26 and the bag beater 243 driven by cylinder 242 work together to remove the powder from the bag. The waste bag is then removed, thus separating the powder from the waste bag. The powder falls through the feeding butterfly valve 212 at the bottom of the conical hopper 23 into the inlet of the variable frequency screw conveyor 31, and is then transported upwards. It then falls through the outlet into the weighing device 32 for automated weighing (the weighing device 32 has a built-in weight sensor to provide feedback on the material quantity). The powder then falls through the outlet of the weighing device 32 into the variable frequency screw feeder 33. If there is no material in the weighing device 32, the variable frequency screw conveyor 31 is opened to quickly feed material into the weighing device 32 until the material in the weighing device 32 reaches the set value, at which point feeding stops. The unloading of the weighing device 32 is in continuous operation. As the material in the weighing device 32 decreases, the instrument performs inverse PID control, interlocking the instantaneous flow rate with the set flow rate. When rapidly adding material into the weighing device 32, the instrument uses static control for measurement, and the control mode is batch feeding. When the powder weight in the weighing device 32 reaches the set value, the variable frequency screw conveyor 31 stops, and the material gate of the weighing device 32 starts to unload. This is a continuous batch operation. Another mode is single start. After passing through the variable frequency screw feeder 33, the powder is fed into the solution tank 41, and then the agitator 42 stirs the material inside the solution tank 41. The mixture is then mixed, and the dosing system consists of a metering pump 432, a pipeline flow meter 435, an automatic air intake and exhaust valve 437, and a pulse damper 4319, which enables the present invention to achieve zero dust leakage. This is achieved through fully enclosed unpacking and dual dust removal using bag filters and pulse jets, improving dosing accuracy. This is achieved through closed-loop control of the metering and weighing device 32 and the control cabinet, with an error of ≤2%, increasing equipment compatibility. The adjustable hoisting bracket 12 and the double-edged cutter 22 support seamless switching between 50-1000kg bag types and have an anti-blocking and anti-arching design, which is achieved through the operation of the silo anti-arching vibrator 210, resulting in good actual performance of the present invention.
[0034] Working principle of this utility model: Refer to the instruction manual appendix Figure 1-11When using this utility model, the lifting and hoisting system 1, unpacking system 2, conveying and metering system 3, and dosing system 4 enable zero dust leakage. This is achieved through fully enclosed unpacking and dual dust removal using bag filters and pulse jets, improving dosing accuracy. The metering and weighing device 32 and closed-loop control of the control cabinet ensure an error of ≤2%, increasing equipment compatibility. The adjustable hoisting bracket 12 and double-edged cutter 22 support seamless switching between 50-1000kg bag types and feature an anti-blocking and anti-arching design, achieved through the operation of the hopper anti-arching vibrator 210, resulting in good actual performance of this utility model.
[0035] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An automatic powder dispensing device, comprising a lifting and hoisting system (1), characterized in that: The lifting and hoisting system (1) is provided with a packing unpacking system (2) on one side, a conveying and metering system (3) is provided on one side, and a feeding system (4) is provided on one side of the conveying and metering system (3). The lifting system (1) includes a load-bearing frame (11), a single beam crane (13) is provided on the top and bottom sides of the load-bearing frame (11), and an adjustable lifting bracket (12) is provided at the bottom of the single beam crane (13). The unpacking system (2) includes an unpacking system frame (21). A double-edged cutter (22) is provided on the inner bottom side of the unpacking system frame (21). A conical hopper (23) is provided at the bottom of the double-edged cutter (22). A top door opening and closing system (24) is provided on the inner top side of the unpacking system frame (21). A hopper main door opening and closing system (25) is provided at the bottom of the top door opening and closing system (24). A pneumatic bag-tapping device (26) is provided on one side of the hopper main door opening and closing system (25). The pneumatic bag-tapping device (26) is located on the unpacking system frame. In the middle of the frame (21), a dust removal fan (27) is fixedly installed on one side of the top of the unpacking system frame (21). A high-pressure pulse valve group (28) is set at the bottom of the dust removal fan (27). A bag filter chamber (29) is set at the bottom of the high-pressure pulse valve group (28). A hopper arch-breaking vibrator (210) is fixedly installed on the front side of the bottom of the conical hopper (23). Rotary paddle level gauges (211) are fixedly installed on both sides of the bottom of the conical hopper (23). A feeding butterfly valve (212) is fixedly installed at the bottom end of the conical hopper (23). The top door opening and closing system (24) includes a cylinder bracket (241), a cylinder (242) is fixedly installed on the top of the cylinder bracket (241), a bag flapper (243) is fixedly installed at the end of the output shaft of the cylinder (242), and a cylinder bracket (244) is provided at the bottom of the bag flapper (243). The silo main gate opening and closing system (25) includes a main gate cylinder bracket (251), which is fixedly installed on the unpacking system frame (21). A second cylinder (252) is fixedly installed at the bottom of the main gate cylinder bracket (251). A door leaf connecting bracket (253) is fixedly installed at the end of the output shaft of the second cylinder (252). A silo door leaf (254) is fixedly installed at the end of the door leaf connecting bracket (253). The conveying and metering system (3) includes a variable frequency screw conveyor (31), a metering and weighing device (32) is provided at the top and bottom of the variable frequency screw conveyor (31), and a variable frequency screw feeder (33) is provided at the bottom of the metering and weighing device (32). The dosing system (4) includes a solution tank (41), a stirrer (42) is provided on the solution tank (41), a dosing device (43) is provided on one side of the solution tank (41), and a dosing control cabinet (44) is provided on one side of the dosing device (43). The dosing equipment (43) includes an alum-adding frame (431), multiple tees (436), and multiple double-ruling ball valves (4311). Two metering pumps (432) are fixedly installed on the front side of the alum-adding frame (431). A Y-type filter (433) is provided on one side of the bottom of the alum-adding frame (431). A union (438) is fixedly installed on the rear side of the metering pumps (432). A reducer (4317) is installed on the top of the union (438) and the bottom of the metering pump (432) through a pipe. A union (4318) is installed on the top of the reducer (4317) through a pipe. A pulse damper (4319) is installed on the top of the union (4318) through a pipe. A frame-type PVC pipe assembly (4314) is installed on one side of the Y-type filter (433) through a pipe. Two safety valves (434) are fixedly installed on both sides of the VC pipe assembly (4314). A pipe flow meter (435) is installed at the bottom of the two safety valves (434) located at the top. An elbow (439) is fixedly installed at the corner of the frame-type PVC pipe assembly (4314). An automatic air intake and exhaust valve (437) is installed on the top of the frame-type PVC pipe assembly (4314) through a tee (436). A pressure gauge (4315) is installed in the middle of the frame-type PVC pipe assembly (4314) through a tee (436). A pressure gauge (4315) is also installed on the top of the pulse damper (4319). A special-shaped tee (4322) is installed at the bottom of the safety valve (434) located at the bottom. A double-ruling ball valve (4323) is installed on the rear side of the special-shaped tee (4322) through a pipe.
2. The automatic powder feeding device according to claim 1, characterized in that: The output end of the single-beam crane (13) is connected to the adjustable hoisting bracket (12) via transmission, and the output shaft of cylinder one (242) is connected to the bag beater (243) via transmission.
3. The automatic powder feeding device according to claim 1, characterized in that: The door leaf connecting bracket (253) is connected to the output shaft of cylinder two (252) via a transmission.
4. The automatic powder feeding device according to claim 1, characterized in that: The pipe between the pulse damper (4319) and the metering pump (432) at the corresponding position is connected to the frame PVC pipe assembly (4314) via a tee (436) and a pipe.
5. The automatic powder dispensing device according to claim 1, characterized in that: The irregular tee (4322) is installed on the frame-type PVC pipe assembly (4314).
6. The automatic powder feeding device according to claim 1, characterized in that: Multiple of the aforementioned double-ruler ball valves (4311) are respectively installed on the pipe between the Y-type filter (433) and the frame-type PVC pipe assembly (4314), on both sides and bottom of the frame-type PVC pipe assembly (4314), on one end of the pipe behind the double-ruler ball valve (4323), and on the inner side of the middle part of the frame-type PVC pipe assembly (4314).
7. The automatic powder feeding device according to claim 1, characterized in that: The double-ruling ball valve (4311) on the inner side of the middle of the frame-type PVC pipe assembly (4314) is connected to the frame-type PVC pipe assembly (4314) through a pipe and a tee (436).