Powder conveying and weighing device

Abstract

The utility model relates to a powder conveying and weighing device which comprises a machine frame, a powder conveying device, a weighing device and a weighing device. The first conveying mechanism is connected to the working table top and comprises a material containing hopper and an auger conveying channel connected to the bottom of the material containing hopper, the outlet end of the auger conveying channel is connected with a discharging hopper, the material containing hopper is connected with a feeding conveying pipeline, and the discharging hopper is provided with a discharging nozzle; the second conveying mechanism is connected to the bottom of the working table through a fixing frame and comprises a pipeline set connected to the fixing frame, the pipeline set is connected with the discharging nozzle and the powder receiving bottle, and butterfly valves are connected to the positions, close to the discharging nozzle and the powder receiving bottle, of the pipeline set; the weighing mechanism comprises a supporting frame connected to the working bottom plate, a weighing sensor and a weighing disc, the weighing sensor and the weighing disc are connected through the supporting frame, and the receiving bottle is arranged on the weighing disc. According to the powder feeding device, accurate amount control or compensation of powder can be achieved, dust raising during discharging can be prevented, and connection with other working procedures of a production line is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of powder weighing technology, specifically a powder conveying and weighing device. Background Technology

[0002] Automated packaging of metal powders typically involves processes such as labeling cans, weighing powder, locking can caps, and packing. Among these processes, automatic powder weighing is a crucial step. Precisely controlling powder weight while ensuring operational safety is a significant technical challenge in achieving unmanned production lines. Utility model patent CN221077794U discloses a powder quantitative weighing device, describing the following technical solution: "After the receiving cylinder receives a certain amount of powder material through the discharge pipe, a driving component is used to move the receiving cylinder along a fixed rail, allowing it to move directly above the holding cylinder. At this point, the weight of the powder material in the receiving cylinder causes the baffle plate to rotate downwards under the pressure of the powder material, resulting in a quantitative amount of powder material falling into the holding cylinder. An electronic scale on the base then weighs the powder material in the holding cylinder." In this solution, the electronic scale weighs the material falling from the receiving cylinder into the holding cylinder, which is actually a quantitative amount of material in the receiving cylinder. This solution cannot adjust the amount of powder discharged according to the actual required weight, and the method of discharging by the powder's own weight pressing the baffle plate easily causes fluctuations in the discharge amount. Therefore, there is an urgent need for a discharge weighing device that can accurately control the powder weight. Utility Model Content

[0003] The purpose of this invention is to provide a powder conveying and weighing device that can solve the technical problems mentioned in the background section.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a powder conveying and weighing device, comprising a frame, a first conveying mechanism, a second conveying mechanism, and a weighing mechanism. The frame is provided with a working base plate and a worktable, and an installation space is provided between the working base plate and the worktable. The first conveying mechanism is connected to the worktable and includes a material hopper and an auger conveying channel connected to its bottom. The outlet end of the auger conveying channel is connected to a discharge hopper, and the material hopper is connected to an inlet conveying pipe. The discharge hopper is provided with a discharge nozzle. The second conveying mechanism is connected to the bottom of the worktable via a fixed frame and includes a pipe assembly connected to the fixed frame. The top end of the pipe assembly is connected to the discharge nozzle, and the bottom end is connected to a powder receiving bottle. The pipe assembly is connected to butterfly valves near the discharge nozzle and the powder receiving bottle, respectively. The weighing mechanism includes a support frame connected to the working base plate and a weighing sensor and a weighing pan connected via the support frame. The receiving bottle is placed on the weighing pan.

[0005] In a preferred embodiment, the bottom end of the material hopper is connected to the auger conveying channel through a connecting shell. The connecting shell encloses a connecting cavity, and stirring teeth are connected in the connecting cavity. The stirring teeth are rotatably connected to the connecting shell.

[0006] In a preferred embodiment, the hopper is further connected to a liftable unblocking needle, which is coaxial with the discharge nozzle and is used to unblock the discharge nozzle.

[0007] In a preferred embodiment, both the auger conveying channel and the hopper are made of transparent material.

[0008] In a preferred embodiment, the outer diameter of the pipe assembly is smaller than the inner diameter of the receiving bottle.

[0009] In a preferred embodiment, the pipe assembly is fixed with a sealing plate extending circumferentially near the outlet end.

[0010] In a preferred embodiment, the pipe assembly includes a first pipe, a corrugated pipe, and a second pipe connected in sequence, wherein the first pipe is connected to a discharge nozzle and the second pipe is connected to a receiving bottle.

[0011] In a preferred embodiment, the second conveying mechanism further includes a positioning plate disposed below the fixed frame, the bottom end of the first pipe and the top end of the corrugated pipe are respectively connected to the fixed frame via flanges, the bottom end of the corrugated pipe and the top end of the second pipe are respectively connected to the positioning plate via flanges, and the second conveying mechanism further includes a second cylinder fixedly connected to the bottom of the fixed frame, the output end of the second cylinder being connected to the positioning plate.

[0012] In a preferred embodiment, the positioning plate is further connected to a guide post, the guide post passing through a fixing frame, and the fixing frame is connected to a bushing that slides with the guide post.

[0013] In a preferred embodiment, the support frame in the weighing mechanism is configured as a liftable structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The powder conveying and weighing device provided by this utility model can achieve precise control or compensation of powder quantity through the auger conveying structure in the first conveying mechanism and the double butterfly valve control pipeline structure in the second conveying mechanism;

[0016] 2. The retractable pipe assembly and the sealing plate structure of the pipe assembly in the second conveying mechanism can achieve precise docking with powder receiving bottles of different specifications, while also preventing dust.

[0017] 3. The liftable support frame in the weighing mechanism allows receiving bottles of different heights to be matched with the pipeline assembly. On the other hand, the liftable receiving bottles facilitate connection with other processes on the production line. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the powder conveying and weighing device in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the first conveying mechanism in an embodiment of the present utility model (the hopper hides its shell to show its internal structure);

[0020] Figure 3 for Figure 2 Another perspective illustration;

[0021] Figure 4 This is a schematic diagram of the structure of the second conveying mechanism in an embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the weighing mechanism in an embodiment of the present invention.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Frame; 11. Worktable; 12. Work base plate;

[0025] 2. First conveying mechanism; 21. Material hopper; 211. Feed conveying pipe; 22. Screw conveying channel; 23. Discharge hopper; 231. Discharge nozzle; 232. Unclogging needle; 233. First cylinder; 24. Connecting housing; 25. Air inlet; 26. Viewing window; 27. Agitating teeth; 28. Motor;

[0026] 3. Second conveying mechanism; 31. Fixed frame; 32. Butterfly valve; 33. Sealing plate; 341. First pipeline; 342. Bellows; 343. Second pipeline; 35. Positioning plate; 36. Second cylinder; 37. Guide post; 38. Bushing; 39. Limiting snap ring; 40. Proximity switch;

[0027] 4. Weighing mechanism; 41. Support frame; 411. Lead screw; 412. Third cylinder; 42. Weighing sensor; 43. Weighing pan; 44. Support plate; 45. First mounting base; 46. Second mounting base;

[0028] 5. Receiving bottle; 6. Casters; 7. Hanging ring. Detailed Implementation

[0029] 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.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] See Figure 1 This embodiment discloses a powder conveying and weighing device, including a frame 1, a first conveying mechanism 2 connected to the frame 1, a second conveying mechanism 3 connected thereto, and a weighing mechanism 4. The first conveying mechanism 2 conveys powder quantitatively to the second conveying mechanism 3, and the second conveying mechanism 3 conveys powder precisely and quantitatively to the receiving bottle 5 on the weighing mechanism 4.

[0032] like Figure 1 As shown, the frame 1 is provided with a working base plate 12 and a worktable 11. An installation space is provided between the working base plate 12 and the worktable 11. The first conveying mechanism 2 is fixedly connected to the top worktable 11. The second conveying mechanism 3 and the weighing mechanism 4 are arranged in the installation space. The weighing mechanism 4 is fixedly connected to the working base plate 12.

[0033] See Figure 2 and Figure 3 The first conveying mechanism 2 includes a material holding hopper 21 and an auger conveying channel 22 fixedly connected to its bottom. The outlet end of the auger conveying channel 22 is fixedly connected to a discharge hopper 23, wherein the auger conveying channel 22 and the discharge hopper 23 are fixedly connected to the worktable 11.

[0034] Specifically, the material hopper 21 is constructed as a sealed cavity structure. Its top end is connected to an inlet conveying pipe 211, and its bottom end is connected to an auger conveying channel 22 via a connecting housing 24. The connecting housing 24 encloses and forms a connecting cavity. The powder material in the material hopper 21 collects in the connecting cavity and enters the auger conveying channel 22 through the connecting cavity. The inlet conveying pipe 211 is connected to a valve. Closing the valve protects the powder environment inside the material hopper 21, preventing impurities or oxygen from entering. Excessive oxygen concentration increases the risk of powder explosion. The material hopper 21 is also equipped with an air inlet 25, through which inert gas is supplied to the material hopper 21, thereby reducing static electricity generated during powder conveying.

[0035] In this embodiment, a rotatable auger screw is installed inside the auger conveying channel 22, and both the auger conveying channel 22 and the auger screw are arranged horizontally to facilitate control of the powder flow rate. The auger conveying structure is existing technology, and its structure will not be described in detail here.

[0036] In practical applications, powder enters the feeding hopper 21 through the feed conveying pipe 211 until the required feed amount is reached. Then, the auger screw is activated to quantitatively convey the powder to the discharge hopper 23. Preferably, the feeding hopper 21 is equipped with a viewing window 26 to facilitate observation of the feed amount by the operator.

[0037] In a preferred embodiment, to prevent powder agglomeration, a horizontally arranged stirring tooth 27 is also connected to the connecting cavity, and the stirring tooth 27 is rotatably connected to the connecting housing 24. To save space and reduce costs, in this embodiment, the stirring tooth 27 and the aforementioned auger screw are driven by the same motor 28, and the two are connected by a sprocket and chain.

[0038] The feeding hopper 23 is fixedly connected to the outlet end of the auger conveying channel 22, and the connection end is provided with an opening, through which the powder material enters the feeding hopper 23. The bottom end of the feeding hopper 23 is provided with a funnel-shaped discharge nozzle 231, through which the powder material in the feeding hopper 23 enters the second conveying mechanism 3.

[0039] It should be noted that, in order to match the precise volume control of the second conveying mechanism 3, the discharge nozzle 231 of the hopper 23 has a relatively small diameter. To prevent blockage, in a preferred embodiment, a liftable unblocking needle 232 is also connected inside the hopper 23. The unblocking needle 232 is coaxial with the discharge nozzle 231, and the reciprocating motion of the unblocking needle 232 can unblock the discharge nozzle 231. Specifically, a first cylinder 233 is fixedly connected to the top of the hopper 23. The output end of the first cylinder 233 extends into the hopper 23 and is fixedly connected to the unblocking needle 232.

[0040] In another preferred embodiment, both the screw conveyor channel 22 and the hopper 23 are made of transparent material to facilitate observation of the internal powder flow and whether there is any blockage. For example, acrylic sheet or tempered glass can be used.

[0041] Combination Figure 4 The second conveying mechanism 3 is fixedly connected to the bottom of the workbench 11 via a fixed frame 31. Specifically, the second conveying mechanism 3 includes a pipe assembly fixedly connected to the fixed frame 31 via a flange. The pipe assembly is vertically arranged, with its top end connected to the discharge nozzle 231 of the hopper 23 and its bottom end connected to the receiving bottle 5.

[0042] As shown in the figure, the second conveying mechanism 3 further includes two sets of butterfly valves 32 connected to the pipeline assembly: a first butterfly valve 32 connected to the upper part of the pipeline assembly and a second butterfly valve 32 connected to the lower part of the pipeline assembly. In this embodiment, by setting two sets of butterfly valves 32, precise control or compensation of powder can be achieved. Specifically, when the weighing mechanism 4 senses the specified weight, the two butterfly valves 32 receive a linkage signal and simultaneously close the valves. In this embodiment, the pipe diameter of the pipeline assembly is set to be relatively small, allowing the butterfly valves 32 to better control the powder flow. If the control panel displays a weight that does not match the specified weight (less than the specified weight), the second butterfly valve 32 can be opened to replenish the powder appropriately.

[0043] In a preferred embodiment, the outer diameter of the pipe assembly is smaller than the inner diameter of the mouth of the receiving bottle 5, and the outer diameter of the pipe assembly is less than 2 / 3 of the inner diameter of the mouth of the receiving bottle 5, so that the outlet end of the pipe assembly can extend into the receiving bottle 5. This structural arrangement can prevent dust from being emitted. More preferably, a sealing plate 33 is fixedly provided on the pipe assembly near the outlet end, extending circumferentially. When the outlet end of the pipe assembly extends into the receiving bottle 5, the sealing plate 33 covers the mouth of the receiving bottle 5, which can further prevent dust from being emitted.

[0044] Combination Figure 5 The weighing mechanism 4 includes a support frame 41 fixedly connected to the working base plate 12, and a weighing sensor 42 and a weighing pan 43 connected through the support frame 41. The bottom of the weighing pan 43 is connected to the weighing sensor 42 through a support plate 44. The receiving bottle 5 is placed on the weighing pan 43.

[0045] In a preferred embodiment, to enable the pipe assembly of the second conveying mechanism 3 to adapt to receiving bottles 5 of different heights, the pipe assembly is telescopic in this embodiment. For details, please refer again. Figure 4The pipeline assembly further includes a first pipeline 341, a corrugated pipe 342, and a second pipeline 343 connected in sequence. The first pipeline 341 is connected to the discharge nozzle 231 of the hopper 23, and the second pipeline 343 is connected to the receiving bottle 5. More specifically, the second conveying mechanism 3 also includes a positioning plate 35 disposed below the fixed frame 31. The bottom end of the first pipeline 341 and the top end of the corrugated pipe 342 are respectively connected to the fixed frame 31 via flanges, and the bottom end of the corrugated pipe 342 and the top end of the second pipeline 343 are respectively connected to the positioning plate 35 via flanges. A first butterfly valve 32 is connected to the first pipeline 341, and a second butterfly valve 32 is connected to the second pipeline 343.

[0046] In this embodiment, the second conveying mechanism 3 further includes a second cylinder 36 fixedly connected to the bottom of the fixed frame 31. The output end of the second cylinder 36 is fixedly connected to the positioning plate 35, thereby driving the positioning plate 35 and the bellows 342 to move up and down and extend and retract. To prevent the bellows 342 from moving skewed, a guide post 37 is also connected to the top of the positioning plate 35. The guide post 37 passes through the fixed frame 31, and a bushing 38 that slides with the guide post 37 is connected at the passing position. A limit snap ring 39 is connected to the top of the guide post 37.

[0047] The bottom of the positioning plate 35 is also connected to a proximity switch 40. When the sealing plate 33 is closed on the mouth of the receiving bottle 5, the proximity switch 40 can be used for distance detection to prepare for subsequent continuous operation.

[0048] In a preferred embodiment, the support frame 41 in the weighing mechanism 4 is configured as a liftable structure. This structure allows receiving bottles 5 of different heights to be matched with the pipe assembly. Furthermore, the liftable receiving bottles 5 facilitate connection with other processes on the production line, such as labeling and capping of the receiving bottles 5. The support frame 41 can employ a linear motion mechanism from the prior art. For example, it can use a manually or electrically controlled screw structure, cylinder structure, etc., preferably, such as... Figure 5 As shown, this embodiment adopts a combination structure of lead screw 411 and cylinder to meet the requirements of multiple working conditions. The cylinder is a third cylinder 412, which is fixedly connected to the output end of the lead screw 411 structure through the first mounting base 45. The output end of the third cylinder 412 is connected to the weighing sensor 42 through the second mounting base 46.

[0049] In a preferred embodiment, the bottom of the work base 12 is connected to multiple sets of casters 6, which, for example, can be casters or swivel casters. The top of the work surface 11 is connected to multiple sets of lifting rings 7 to facilitate equipment hoisting.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A powder conveying and weighing device, characterized in that, include: The frame (1) is provided with a working base plate (12) and a worktable (11), and an installation space is provided between the working base plate (12) and the worktable (11); The first conveying mechanism (2) is connected to the workbench (11) and includes a material hopper (21) and an auger conveying channel (22) connected to its bottom. The outlet end of the auger conveying channel (22) is connected to a discharge hopper (23). The material hopper (21) is connected to an inlet conveying pipe (211). The discharge hopper (23) is provided with a discharge nozzle (231). The second conveying mechanism (3) is connected to the bottom of the workbench (11) via a fixed frame (31), and includes a pipe assembly connected to the fixed frame (31). The top end of the pipe assembly is connected to the discharge nozzle (231), and the bottom end is connected to the powder receiving bottle (5). The pipe assembly is connected to butterfly valves (32) at positions near the discharge nozzle (231) and the powder receiving bottle (5). The weighing mechanism (4) includes a support frame (41) connected to the working base plate (12) and a weighing sensor (42) and a weighing pan (43) connected through the support frame (41), wherein the receiving bottle (5) is placed on the weighing pan (43).

2. The powder conveying and weighing device according to claim 1, characterized in that, The bottom end of the material hopper (21) is connected to the auger conveying channel (22) through the connecting shell (24). The connecting shell (24) forms a connecting cavity, and the connecting cavity is connected to the stirring teeth (27). The stirring teeth (27) are rotatably connected to the connecting shell (24).

3. The powder conveying and weighing device according to claim 1, characterized in that, The hopper (23) is also connected to a liftable unblocking needle (232), which is coaxial with the discharge nozzle (231) and is used to unblock the discharge nozzle (231).

4. The powder conveying and weighing device according to claim 1, characterized in that, The auger conveying channel (22) and the hopper (23) are both made of transparent material.

5. The powder conveying and weighing device according to claim 1, characterized in that, The outer diameter of the pipe assembly is smaller than the inner diameter of the receiving bottle (5).

6. The powder conveying and weighing device according to claim 5, characterized in that, The pipeline assembly is fixed with a sealing plate (33) extending circumferentially near the outlet end.

7. The powder conveying and weighing device according to claim 1, characterized in that, The pipe assembly includes a first pipe (341), a corrugated pipe (342), and a second pipe (343) connected in sequence. The first pipe (341) is connected to the discharge nozzle (231), and the second pipe (343) is connected to the receiving bottle (5).

8. The powder conveying and weighing device according to claim 7, characterized in that, The second conveying mechanism (3) further includes a positioning plate (35) disposed below the fixed frame (31). The bottom end of the first pipe (341) and the top end of the corrugated pipe (342) are respectively connected to the fixed frame (31) through flanges. The bottom end of the corrugated pipe (342) and the top end of the second pipe (343) are respectively connected to the positioning plate (35) through flanges. The second conveying mechanism (3) further includes a second cylinder (36) fixedly connected to the bottom of the fixed frame (31). The output end of the second cylinder (36) is connected to the positioning plate (35).

9. The powder conveying and weighing device according to claim 8, characterized in that, The positioning plate (35) is also connected to a guide post (37), which passes through the fixing frame (31). The fixing frame (31) is connected to a bushing (38) that slides with the guide post (37).

10. The powder conveying and weighing device according to claim 1, characterized in that, The support frame (41) in the weighing mechanism (4) is constructed as a liftable structure.

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