Device capable of measuring apparent density of powder for multiple times

Abstract

The utility model relates to the technical field of powder apparent density, and discloses a device capable of measuring the powder apparent density for multiple times, which comprises a funnel arranged at the top of a rack, a measuring cup component arranged in the rack and a weighing component positioned at the bottom of the rack, the upper end of a transmission shaft of the measuring cup assembly is rotationally connected to the top of the rack, and a discharging opening of the funnel is located above a feeding opening of the measuring cup assembly; the measuring cup assembly comprises an upper measuring cup, a middle measuring cup and a lower measuring cup, cavities in the upper measuring cup and the middle measuring cup are through cavities, a group of diagonal cavities in the lower measuring cup are provided with bottom plates, and the other group of diagonal cavities in the lower measuring cup are through cavities; and the lower end of the transmission shaft is in transmission connection with the upper measuring cup, the middle measuring cup or the lower measuring cup through a connector. The powder apparent density measuring device overcomes the defects of an existing powder apparent density measuring device, multiple times of measurement can be achieved after one-time filling, measurement contingency is reduced, and the powder apparent density can be accurately obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of powder bulk density, in particular to a device capable of measuring powder bulk density multiple times. Background Art

[0002] The bulk density refers to the density of the powder when it is naturally piled up. It is closely related to the particle shape, surface roughness, particle size distribution, water content, etc. of the powder, and is a comprehensive reflection of the various properties of the powder. The higher the bulk density, the lower the porosity, and the higher the density of the part after forming, which is beneficial to improving the strength and surface quality of the product. Powders that are too fine or too coarse will reduce their bulk and compact densities. If the powder is too fine, its surface area is large, and the friction between the powders is large, resulting in a lower bulk density; if the powder is too coarse, bridging will occur, and there will be large gaps when the powder is piled up, resulting in a lower bulk density.

[0003] There are three methods for measuring the bulk density of powders: funnel method, Scott volumetric method, and vibrating funnel method. 1. Funnel method: The powder falls freely from the funnel hole at a certain height and fills the cup; 2. Scott volumetric method: Put the powder on the screen of the upper combined funnel, and flow into the material box freely or by external force, alternately passing through the 4 glass plates with an inclination angle of 25° and the square funnel in the material box, and finally fall freely from the funnel hole at a certain height and fill the cup; 3. Vibrating funnel method: The powder is loaded into a funnel with a vibrating device, vibrated under certain conditions, and the powder falls freely from the funnel hole at a certain height with the help of vibration to fill the cup. For powders that can flow freely under specific conditions, the funnel method is used; for non-free-flowing powders, the latter two methods are used. However, due to the different quality of the powder, the measurement is accidental, multiple measurements are required, and the steps are time-consuming and cumbersome. Manual powder scraping not only makes it difficult to clean up the excess powder, but also affects the accuracy of the measurement data to a certain extent. Therefore, it is necessary to design a powder bulk density measuring instrument that can perform multiple measurements and automatically scrape powder. Utility Model Content

[0004] Purpose of the utility model: In view of the problems existing in the prior art, the utility model provides a device that can measure the loose density of powder multiple times, which overcomes the defects of the existing powder loose density measuring devices, can achieve multiple measurements after one filling, and reduce the randomness of measurement.

[0005] Technical solution: The utility model provides a device capable of measuring the loose density of powder multiple times, comprising a funnel arranged on the top of a frame, a measuring cup assembly arranged in the frame, and a weighing assembly located at the bottom of the frame; the upper end of the transmission shaft of the measuring cup assembly is rotatably connected to the top of the frame, and the discharge port of the funnel is located above the feed port of the measuring cup assembly; the measuring cup assembly is provided with a central shaft tube hole, and a longitudinal clamping strip is provided in the central shaft tube hole, and the cross section of the longitudinal clamping strip is a right-angled sector, and the center of the right-angled sector and the center of the central shaft tube hole are located on the same axis; The transmission shaft is located in the central axis tube hole outside the longitudinal clamping strip; four symmetrical cavities are separated by partitions around the central axis tube hole in the measuring cup assembly, and the measuring cup assembly includes an upper measuring cup, a middle measuring cup, and a lower measuring cup, wherein the cavities in the upper measuring cup and the middle measuring cup are through cavities, a group of diagonal cavities in the lower measuring cup is provided with a bottom plate, and another group of diagonally arranged cavities are through cavities; the lower end of the transmission shaft is transmission-connected to the upper measuring cup, the middle measuring cup or the lower measuring cup through a connector, the cross-section of the connector is semicircular, and the transmission shaft is provided with a driving mechanism.

[0006] Furthermore, a waste tray is provided on the weighing assembly below the measuring cup assembly.

[0007] Furthermore, the waste tray comprises a first waste tray and a second waste tray, and the first waste tray and the second waste tray are assembled and arranged with the transmission shaft as the center.

[0008] Furthermore, the transmission shaft is sequentially fixed with a first gear, a second gear, a scraper, and two connectors that are transmission-connected to the central axis tube holes of the upper measuring cup, the middle measuring cup or the lower measuring cup.

[0009] Furthermore, the distance between the center positions of the first and second gears is equal to the distance between the center positions of the two connectors.

[0010] Furthermore, the lower end surface of the scraper is in contact with the edge of the measuring cup.

[0011] Furthermore, a limiting clamp ring is provided at the upper end of the transmission shaft after passing through the top of the frame, and the limiting clamp ring is slidably connected to the transmission shaft.

[0012] Furthermore, the driving mechanism includes a variable speed motor, a third gear is provided on an output shaft of the variable speed motor, and the third gear is transmission-connected to the first gear or the second gear on the transmission shaft.

[0013] Furthermore, a battery assembly and a switch are arranged on the rack.

[0014] Beneficial effects: Compared with the prior art, the utility model saves labor and reduces the time required for measurement by automatically measuring and scraping off powder, and can better remove fallen powder. Multiple measurements can be achieved after one filling, and the loose density of the powder can be obtained more accurately.

[0015] The advantages of the utility model are as follows:

[0016] 1. Most existing equipment uses manual powder removal, which not only tests manual skills, but also affects the measurement data, which is time-consuming and labor-intensive. The utility model uses an automatic powder scraping device to reduce errors and increase the measurement speed.

[0017] 2. Most existing equipment can only measure the bulk density once. We use segmented measurement, which can achieve multiple measurements after one filling, measure multiple experimental data, and take the average value. The bulk density of the powder to be tested can be measured more accurately, reducing the accidental nature of the experiment and ensuring the accuracy of the experiment.

[0018] 3. The utility model adds a waste tray to recycle scraped waste and reduce experimental losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a device capable of measuring the bulk density of powder multiple times provided by the utility model;

[0020] Figure 2 This is a structural diagram of the middle and lower measuring cup of the utility model;

[0021] Figure 3 This is a structural diagram of an upper measuring cup or a middle measuring cup of the utility model;

[0022] Figure 4 It is a structural diagram of the transmission shaft in the utility model;

[0023] Figure 5 It is a structural diagram of the driving mechanism in the utility model;

[0024] Figure 6 This is a structural diagram of the measuring cup assembly of the utility model;

[0025] Figure 7 It is a three-view drawing of the first waste tray in the utility model;

[0026] Figure 8 This is a detailed diagram of the rotation of the connector and the longitudinal clip when the transmission shaft rotates clockwise in the utility model;

[0027] Fig. 9 This is a detailed diagram of the rotation of the connector and the longitudinal clip when the transmission shaft rotates counterclockwise in the utility model;

[0028] Description of the drawings: 1-frame, 2-funnel, 3-driving mechanism, 31-speed motor, 32-third gear, 4-switch, 5-battery assembly, 6-transmission shaft, 61-limiting clamping ring, 62-first and second gears, 63-scraper, 64-connector, 7-measuring cup assembly, 71-upper measuring cup, 72-middle measuring cup, 73-lower measuring cup, 74-center axis tube hole, 75-longitudinal clamping strip, 8-weighing assembly, 9-partition, 10-bottom plate, 11-waste tray. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the embodiments and drawings.

[0030] Implementation 1:

[0031] like Figure 1 As shown, the utility model provides a device capable of measuring the loose density of powder multiple times, comprising a funnel 2 arranged on the top of a frame 1, a measuring cup assembly 7 arranged in the frame 1, and a weighing assembly 8 located at the bottom of the frame 1; the upper end of a transmission shaft 6 passing through the measuring cup assembly 7 is rotatably connected to the top of the frame 1, and the discharge port of the funnel 2 is located above the feed port of the measuring cup assembly 7; the measuring cup assembly 7 is provided with a central shaft tube hole 74, and a longitudinal clamping strip 75 is provided in the central shaft tube hole 74, and the cross section of the longitudinal clamping strip 75 is a right-angled sector, and the center of the right-angled sector and the center of the central shaft tube hole 74 are located on the same axis; the transmission shaft 6 is located Inside the central axis tube hole 74 outside the longitudinal clamping strip 75; four symmetrical cavities are separated by the partition 9 around the central axis tube hole 74 in the measuring cup assembly 7, and the measuring cup assembly 7 includes an upper measuring cup 71, a middle measuring cup 72, and a lower measuring cup 73; wherein, the inner cavities of the upper measuring cup 71 and the middle measuring cup 72 are all through cavities, and a group of diagonal cavities in the lower measuring cup 73 is provided with a bottom plate 10, and the other group of diagonally arranged cavities are through cavities; the lower end of the transmission shaft 6 is transmission-connected to the upper measuring cup 71, the middle measuring cup 72 or the lower measuring cup 73 through a connecting head 64, the cross-section of the connecting head 64 is semicircular, and the transmission shaft 6 is provided with a driving mechanism 3.

[0032] A waste tray 11 is provided on the weighing assembly 8 below the measuring cup assembly 7. The waste tray 11 includes a first waste tray and a second waste tray. The first waste tray and the second waste tray are assembled and arranged with the transmission shaft 6 as the center. Figure 7 A waste tray design provided in this embodiment can be composed of two semicircles. The waste tray 11 is used to recover excess powder and support the measuring cup assembly 7. The waste tray 11 is designed to be two and is assembled with the transmission shaft 6 as the center. When recovering excess powder, one of the waste trays is first pulled out to recover the powder, and the other waste tray is not taken out first, and serves as a support for the measuring cup assembly 7; after one of the waste trays is put back, the other waste tray is pulled out to recover the powder therein.

[0033] like Figure 4The transmission shaft 6 is fixed with the first and second gears 62, the scraper 63, and two connectors 64 that are connected to the central shaft tube hole 74 of the upper measuring cup 71, the middle measuring cup 72 or the lower measuring cup 73 in sequence; the distance between the center positions of the first and second gears 62 is equal to the distance between the center positions of the two connectors 64, which is equal to the thickness of the upper measuring cup 71, the middle measuring cup 72 or the lower measuring cup 73; the lower end surface of the scraper 63 fits the edge of the cup mouth of the upper measuring cup 71; the upper end of the transmission shaft 6 is provided with a limit snap ring 61 after passing through the top of the frame 1, and the limit snap ring 61 is slidably connected with the transmission shaft 6. The driving mechanism 3 includes a variable speed motor 31, and the output shaft of the variable speed motor 31 is provided with a third gear 32, which is connected to the first gear or the second gear on the transmission shaft 6 in a transmission manner; the frame 1 is also provided with a battery assembly 5 and a switch 4.

[0034] The working principle of the utility model is as follows:

[0035] Before measurement, the weighing assembly is zeroed and the position of each measuring cup is adjusted to ensure that the longitudinal clamping strips in the central axis tube holes of the upper measuring cup, the middle measuring cup and the lower measuring cup are vertically aligned; the position of the transmission shaft is adjusted to ensure that the two connectors in the transmission shaft are located in the central axis tube holes of the upper measuring cup and the lower measuring cup; and the third gear is ensured to be connected to the first gear in transmission.

[0036] Allow the powder to be measured in the funnel to fall into the measuring cup assembly through the discharge port, and then fall into one of the cavities with a bottom plate in the lower measuring cup through the through cavities of the upper measuring cup and the middle measuring cup. Fill the cavity with a bottom plate in the lower measuring cup, as well as the cavities of the upper and middle measuring cups that are connected to the cavity, with powder. After filling, turn on the switch, adjust the speed of the drive mechanism, and the third gear drives the first gear to rotate the transmission shaft. Keep the measuring cup assembly stationary, rotate the scraper 90°, scrape off the excess powder in the cavity, and drop it into the waste tray through the through cavities of the upper, middle, and lower measuring cups in turn. Turn off the switch. (It should be noted here that if Figure 8-9 As shown in the figure, if the transmission shaft rotates clockwise, the connector rotates 90° clockwise and then gets stuck with the longitudinal clamping strip; if the transmission shaft rotates counterclockwise, the connector rotates 90° counterclockwise and then gets stuck with the longitudinal clamping strip). First, pull out the first waste tray, recycle the powder in it, and put it back; then pull out the second waste tray, recycle the powder in it, and put it back. Read the data of the weighing component, which is the total mass of the powder in the single cavity of the upper measuring cup, the single cavity of the middle measuring cup, and the single cavity of the lower measuring cup.

[0037] Turn on the switch, adjust the speed of the drive mechanism, and start the transmission shaft to work. Because the connector is stuck with the longitudinal card strip, the contact brake is applied, and the scraper rotates with the upper measuring cup, rotating 90°, so that the powder in the through-hole of the upper measuring cup and the excess powder filled above the middle measuring cup are scraped off by the bottom of the upper measuring cup partition, and fall into the waste tray through the through-holes of the middle and lower measuring cups. Turn off the switch. First pull out the first waste tray, recycle the powder in it, and put it back; then pull out the second waste tray, recycle the powder in it, and put it back. Read the data of the weighing component, which is the total mass of the powder in a single cavity of the middle measuring cup and a single cavity of the lower measuring cup.

[0038] Pull up the transmission shaft so that the third gear is connected to the second gear, and limit the transmission shaft with a limit clamp. At this time, the connector enters the central axis tube hole of the middle measuring cup. Turn on the switch, adjust the speed of the drive mechanism, and start the transmission shaft. Because the connector is stuck with the longitudinal clamping strip, the contact brake, the scraper rotates with the middle measuring cup, rotates 90°, so that the powder in the through-hole of the middle measuring cup and the excess powder filled above the lower measuring cup are scraped off by the bottom of the middle measuring cup partition and fall into the waste tray through the through-hole of the lower measuring cup. Turn off the switch. First pull out the first waste tray, recycle the powder in it, and put it back; then pull out the second waste tray, recycle the powder in it, and put it back. Read the data of the weighing component, which is the powder in a single cavity of the lower measuring cup. After the measurement, reset the device.

[0039] The above implementation is only to illustrate the technical concept and features of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and it cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A device capable of measuring the bulk density of powder multiple times, characterized in that: The invention comprises a funnel (2) arranged on the top of a frame (1), a measuring cup assembly (7) arranged in the frame (1), and a weighing assembly (8) located at the bottom of the frame; the upper end of the transmission shaft (6) of the measuring cup assembly (7) is rotatably connected to the top of the frame, and the discharge port of the funnel (2) is located above the feed port of the measuring cup assembly (7); the measuring cup assembly (7) is provided with a central shaft tube hole (74), and a longitudinal clamping strip (75) is provided in the central shaft tube hole (74), and the cross section of the longitudinal clamping strip (75) is a right-angled sector, and the center of the right-angled sector and the center of the central shaft tube hole (74) are located on the same axis; the transmission shaft (6) is located in the central shaft tube hole (74) outside the longitudinal clamping strip (75). ); four symmetrical cavities are separated by a partition (9) around the central axis tube hole (74) in the measuring cup assembly (7); the measuring cup assembly (7) comprises an upper measuring cup (71), a middle measuring cup (72), and a lower measuring cup (73); wherein the cavities in the upper measuring cup (71) and the middle measuring cup (72) are all through cavities; a group of diagonally arranged cavities in the lower measuring cup (73) is provided with a bottom plate (10), and another group of diagonally arranged cavities are through cavities; the lower end of the transmission shaft (6) is transmission-connected to the upper measuring cup (71), the middle measuring cup (72), or the lower measuring cup (73) via a connector (64); the cross section of the connector (64) is semicircular; and the transmission shaft (6) is provided with a driving mechanism (3).

2. The device for measuring the bulk density of powder multiple times according to claim 1, characterized in that: A waste tray (11) is provided on the weighing assembly (8) below the measuring cup assembly (7).

3. The device for measuring the bulk density of powder multiple times according to claim 2, characterized in that: The waste tray (11) comprises a first waste tray and a second waste tray, and the first waste tray and the second waste tray are arranged together with the transmission shaft (6) as the center.

4. The device for measuring the bulk density of powder multiple times according to claim 1, characterized in that: The transmission shaft (6) is fixedly provided with first and second gears (62), a scraper (63), and two connectors (64) which are transmission-connected to the central axis tube holes of the upper measuring cup (71), the middle measuring cup (72) or the lower measuring cup (73).

5. The device for measuring the bulk density of powder multiple times according to claim 4, characterized in that: The distance between the center positions of the first and second gears (62) is equal to the distance between the center positions of the two connecting heads (64).

6. The device for measuring the bulk density of powder multiple times according to claim 4, characterized in that: The lower end surface of the scraper (63) is in contact with the edge of the upper measuring cup.

7. The device for measuring the bulk density of powder multiple times according to claim 4, characterized in that: A limit clamp ring (61) is provided at the upper end of the transmission shaft (6) after passing through the top of the frame (1), and the limit clamp ring (61) is slidably connected to the transmission shaft (6).

8. The device for measuring the bulk density of powder multiple times according to claim 4, characterized in that: The driving mechanism (3) comprises a variable speed motor (31), the output shaft of the variable speed motor (31) is provided with a third gear (32), and the third gear (32) is drivingly connected to the first gear or the second gear on the transmission shaft (6).

9. The device for measuring the bulk density of powder multiple times according to claim 1, characterized in that: The frame (1) is provided with a battery assembly (5) and a switch (4).

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