Powder constant volume metering device

Abstract

The utility model particularly relates to a powder constant volume metering device which is characterized by comprising a material bin and a material distributing mechanism, the material distributing mechanism comprises a round shell with an upper opening and a lower opening, a material outlet of the material bin enters the shell, a material distributing disc is further arranged in the shell and located below the material outlet of the material bin, a stepping motor is arranged below the shell, and the stepping motor is connected with the material distributing disc. A rotating shaft of the stepping motor is connected with the center of the material distributing disc through a speed reducer, a plurality of round holes with the same size are formed in the edge of the material distributing disc in an equally-divided circumferential mode, a material distributing cup is hung in each round hole, the upper end face of each material distributing cup is flush with the upper end face of the material distributing disc, and a push-out air cylinder is arranged below the end, away from the material bin, of the shell. And a scraping plate perpendicular to the material distributing disc is arranged between the two round holes. The device has the advantages of being reasonable in structure, flexible and convenient to use and high in working efficiency.

Description

Technical Field

[0001] The utility model belongs to the field of experimental sampling instruments, and in particular relates to a powder constant volume metering device. Background Art

[0002] The volume determination step is crucial for preparing solutions of precise concentrations in experiments. The first step requires accurate weighing of the solute. For powdered solutes, the traditional approach is manual weighing using a scale. For experiments requiring batch comparisons, multiple batches of the same weight must be prepared and repeated, resulting in lengthy operation times and low efficiency. To address this issue, the Chinese Patent Office published a powder quantitative sampling spoon on May 19, 2023, under publication number CN219046024U. The disclosed sampling spoon comprises a spoon head, a handle, a scraper, and a push rod. The handle has a retaining ring at one end near the head, which houses a push rod. The retaining ring acts as a limiter and guide for the push rod, forcing the bottom of the scraper to remain close to the edge of the spoon head. The push rod's movement is aligned with the length of the handle, and the push rod has a scraper at its end near the head. This sampling spoon ensures consistent sampling of the sample volume, improving sampling efficiency. However, the above-mentioned sampling spoon still requires manual operation, the efficiency is still not high, and due to the size of the sampling spoon, it can only be used to sample trace amounts of powder. Utility Model Content

[0003] The purpose of the utility model is to provide a powder constant volume metering device, which can quickly measure constant volume and pack powder raw materials, thereby improving work efficiency.

[0004] The utility model is realized through the following technical solutions:

[0005] That is a powder constant volume metering device, which is characterized in that it includes a frame, and the frame is provided with a hopper and a distributing mechanism from top to bottom. The distributing mechanism includes a circular shell with openings at the upper and lower ends of the shell. The discharge port of the hopper enters the interior of the shell. A distributing disk is also provided below the discharge port of the hopper in the shell. The outer diameter of the distributing disk matches the inner diameter of the shell. A stepper motor mounted on the frame is provided below the shell. The rotating shaft of the stepper motor is connected to the center of the distributing disk through a reducer. A plurality of circular holes of the same size are provided on the edge of the distributing disk to divide the circumference into equal parts, and the discharge port of the hopper is directly opposite the center of the circular hole below. The circular hole is a countersunk structure, and a distribution cup is hung inside each circular hole. A horizontal cup ring protruding outward is provided at the upper port of the distribution cup. The distribution cup is hung on the distribution plate through the cup ring. The upper end surface of the distribution cup is flush with the upper end surface of the distribution plate. A push-out cylinder is provided under the shell body away from the end of the hopper. A circular pad is provided on the upper end of the piston rod of the push-out cylinder. The central axis of the piston rod is facing the center of the upper circular hole. A scraper perpendicular to the distribution plate is provided on one side of the hopper and located between the two circular holes. One end of the scraper is fixed to the inner side of the shell body, and the bottom end of the scraper is attached to the upper end surface of the distribution plate.

[0006] The silo of the utility model is used to hold powder raw materials, and it uses gravity to automatically discharge materials. It is located above the distributing disk to ensure that the powder in the distributing disk is in a peaked state each time the materials are discharged. The distributing disk is driven by a stepping motor and rotates intermittently. The angle of rotation is the same as the angle of two adjacent circular holes. That is, each time it rotates, a distributing cup is located directly below the silo discharge port. The distributing cup containing powder rotates, and the powder that is peaked is scraped flat by the scraper, so as to achieve constant volume measurement of powder. When the distributing cup of the scraper rotates to the ejection cylinder, the ejection cylinder is started, the piston rod is extended, and the distributing cup is pushed out through the pad (it does not need to be completely ejected, it only needs to be ejected a certain distance, so that the distributing cup can be taken out conveniently by grabbing the cup ring with hands or tools). After the distributing cup is taken out, an empty distributing cup is placed on it, and the above actions are repeated to achieve continuous constant volume measurement of powder.

[0007] The above-mentioned actions of the present invention can be programmed by PLC, which controls the intermittent work of the stepping motor and the pushing cylinder to realize automatic operation. The experimenter only needs to take out and place the dispensing cup. PLC and its programming are conventional technical means for those skilled in the art.

[0008] The material distribution disc of the present invention rotates in the shell, and there should be a certain gap between the side of the material distribution disc and the shell, that is, the gap fit between the two is similar to the gap fit between the shaft and the hole.

[0009] Furthermore, the upper end surface of the distribution plate of the present invention is provided with an annular retaining ring, the outer side of the retaining ring is tangent to the inner side of the circular hole on the distribution plate, and the other end of the scraper is attached to the outer side of the retaining ring.

[0010] Setting a retaining ring can limit the range of powder when scraping. Without setting a retaining ring, the powder will spread to the entire upper end surface of the distribution plate.

[0011] Furthermore, the scraper of the present invention is a rubber scraper.

[0012] The retaining ring and the material distribution plate of the utility model are both metal products. If the scraper is made of metal and directly contacts with them, it will make a sharp noise during operation. Using a rubber scraper with good toughness and wear resistance has a good scraping effect and can effectively prevent noise.

[0013] The utility model can also use scrapers made of other materials with good toughness and wear resistance.

[0014] Furthermore, the bottom of the ejection cylinder of the present invention is provided with a lifting base, both sides of the lifting base are sleeved on the guide rod, the upper end of the guide rod is fixed on the frame, and the side of the lifting base is provided with fastening bolts.

[0015] The utility model can replace the dispensing cups of different capacities as needed. Since the size of the circular hole on the dispensing plate is fixed, the dispensing cups of different capacities have different heights. In order to facilitate the dispensing cups to be pushed out, the height of the pushing cylinder is changed by using the lifting base, which can be suitable for dispensing cups of different heights.

[0016] Furthermore, a level is provided on one side of the lifting base of the utility model.

[0017] The spirit level of the present invention is a commercially available product in the prior art, also known as a cylindrical level bubble or a level bubble, and has been widely used in products such as camera tripods.

[0018] A level helps keep the lift base level when adjusting its height.

[0019] Furthermore, a vibration motor is provided on one side of the silo of the utility model.

[0020] Some powder raw materials are prone to clogging when being discharged. Using a vibration motor can make the hopper discharge smoother.

[0021] The powder constant volume metering device of the present invention can also be understood as a powder constant volume sampling and packaging device.

[0022] The utility model has the advantages of reasonable structure, flexible and convenient use, and high working efficiency. With the utility model, only one person is required to take out and put in the cup, and the fixed volume sampling work of the powder material can be completed quickly and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 for Figure 1 Schematic diagram of the top view of the center distributing mechanism;

[0025] Figure 3 for Figure 1 Schematic diagram of the structure of the center dividing tray.

[0026] As shown in the figure: 1. Support legs; 2. Frame; 3. Dispensing cup; 4. Shell; 5. Hopper; 6. Vibration motor; 7. Dispensing tray; 8. Reducer; 9. Stepper motor; 10. Retaining ring; 11. Pad; 12. Push-out cylinder; 13. Level; 14. Lifting base; 15. Guide column; 16. Fastening bolt; 17. Scraper; 18. Round hole. DETAILED DESCRIPTION

[0027] The following is a detailed description of the embodiments of the technical solution of the present invention in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0028] like Figure 1 、 Figure 2 、 Figure 3As shown: the frame body 2 of the square frame structure is provided with a silo 5 and a distributing mechanism from top to bottom, a vibration motor 6 is provided on one side of the silo 5, and the distributing mechanism includes a circular shell 4 with openings at the upper and lower ends of the shell 4, and the discharging port of the silo 5 enters the interior of the shell 4, and a distributing plate 7 is provided below the discharging port of the silo 5 in the shell 4, the outer diameter of the distributing plate 7 matches the inner diameter of the shell 4, and a stepper motor 9 mounted on the frame body 2 is provided below the shell 4, and the stepper motor 9 is connected to the center of the distributing plate 7 through a reducer 8, and the edge of the distributing plate 7 is equally divided into a circle and provided with 6 circular holes 18 of the same size (the 6 circular holes 18 should be as close as possible, and the adjacent and distant holes shown in the figure are only for clarity), the discharging port of the silo 5 is directly opposite to the center of the circular hole 18 below, and the circular hole 18 is a countersunk hole structure, and a distributing cup 3 is hung inside each circular hole 18, and a horizontal cup ring protruding outward is provided at the upper port of the distributing cup 3, and the distributing cup 3 is hung on the On the distribution plate 7, the upper end surface of the distribution cup 3 is flush with the upper end surface of the distribution plate 7, and the upper end surface of the distribution plate 7 is also provided with an annular retaining ring 10. The outer side of the retaining ring 10 is tangent to the inner side of the circular hole 18 on the distribution plate 7. On one side of the silo 5, a rubber scraper 17 perpendicular to the distribution plate is provided between the two circular holes 18. One end of the scraper 17 is fixed to the inner side of the shell 5, and the other end of the scraper 17 is attached to the outer side of the retaining ring 10. The bottom end of the scraper 17 is attached to the distribution plate. 7, a pushing cylinder 12 is provided below the shell body 4 at the end away from the silo 5, and a circular pad 11 is provided on the upper end of the piston rod of the pushing cylinder 12. The central axis of the piston rod is aligned with the center of the upper circular hole 18. A lifting base 14 is provided at the bottom of the pushing cylinder 12. Both sides of the lifting base 14 are mounted on the guide rod 15. The upper end of the guide rod 15 is fixed to the frame 2. A level 13 is provided on the front side of the lifting base 14, and fastening bolts 16 are provided on both sides.

[0029] In the initial state of the present invention, the six circular holes 18 of the distributing plate 7 are all hung with empty distributing cups 3, one of which is just below the discharge port of the silo 5. When in use, a large package of powder raw materials is poured into the silo 5, and the stepper motor 9 is started. After a delay of several seconds (the above time is just enough to make the distributing cup 3 below the silo full and in a peaked state), the stepper motor 9 rotates 60 degrees, so that the next empty distributing cup 3 rotates to the bottom of the silo 5, and the distributing cup 3 filled with powder rotates to the next station. During the rotation, it is scraped flat by the scraper 17, and most of the scraped powder Part of it falls into the next empty dispensing cup 3, and the above action is repeated. When the first dispensing cup 3 filled with powder rotates to the ejection cylinder 12, the ejection cylinder 12 is started, and the piston rod is extended to drive the pad 11 to rise, and the dispensing cup 3 filled with powder is ejected (no need to eject all of it). Grasp the cup ring with your hands or tools to take out the dispensing cup 3, and put in a new empty dispensing cup 3. Repeat the above action to continuously perform constant volume measurement and sampling of the powder raw material until the powder in the silo 5 is discharged. When the powder in the last cup is not full, use a balance to weigh it manually.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A powder constant volume metering device, characterized in that The utility model comprises a frame, on which a hopper and a distributing mechanism are provided from top to bottom. The distributing mechanism comprises a circular shell with openings at the upper and lower ends of the shell. The discharging port of the hopper enters the interior of the shell. A distributing plate is further provided in the shell below the discharging port of the hopper. The outer diameter of the distributing plate matches the inner diameter of the shell. A stepper motor mounted on the frame is provided below the shell. The rotating shaft of the stepper motor is connected to the center of the distributing plate through a reducer. A plurality of circular holes of the same size are provided on the edge of the distributing plate so as to divide the circumference into equal parts. The discharging port of the hopper is directly opposite to the center of the circular hole below. The circular hole is a countersunk hole. Structure, a distribution cup is hung inside each circular hole, and a horizontal cup ring protruding outward is provided at the upper port of the distribution cup. The distribution cup is hung on the distribution plate through the cup ring, and the upper end surface of the distribution cup is flush with the upper end surface of the distribution plate. A push-out cylinder is provided under the shell body away from the end of the silo, and a circular pad is provided on the upper end of the piston rod of the push-out cylinder. The central axis of the piston rod is facing the center of the upper circular hole. On one side of the silo, a scraper perpendicular to the distribution plate is provided between the two circular holes. One end of the scraper is fixed to the inner side of the shell body, and the bottom end of the scraper is attached to the upper end surface of the distribution plate.

2. A powder constant volume metering device according to claim 1, characterized in that The upper end surface of the distribution plate is provided with an annular retaining ring, the outer side of the retaining ring is tangent to the inner side of the circular hole on the distribution plate, and the other end of the scraper is attached to the outer side of the retaining ring.

3. A powder constant volume metering device according to claim 1 or 2, characterized in that The scraper is a rubber scraper.

4. A powder constant volume metering device according to claim 1, characterized in that A lifting base is provided at the bottom of the ejection cylinder. Both sides of the lifting base are sleeved on the guide rods. The upper ends of the guide rods are fixed on the frame. Fastening bolts are provided on the sides of the lifting base.

5. A powder constant volume metering device according to claim 1, characterized in that A level is provided on one side of the lifting base.

6. A powder constant volume metering device according to claim 1, characterized in that A vibration motor is provided on one side of the silo.

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