Repose angle measuring device

Abstract

The utility model relates to a repose angle measuring device. The repose angle measuring device comprises a feeding unit and a receiving unit, the feeding unit comprises a conveying module (2) and a control module (3); the conveying module (2) comprises a conveying face capable of conveying materials in the horizontal direction, and an outlet of the conveying module (2) is located above an inlet of the material receiving unit so that the materials from the feeding unit can fall into the material receiving unit. And the control module (3) is used for enabling the conveying surface to vibrate in the vertical direction. According to the measuring device, materials can slowly, uniformly and uninterruptedly fall into the material receiving unit and form an ideal cone with a regular gradient, the accuracy of repose angle measurement is improved, and the measurement error is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of repose angle, and in particular, to a repose angle measuring device. Background Art

[0002] Catalysts move during flow and transport, resulting in friction between the catalysts and between the catalysts and the tube walls. This friction, particularly the cohesion between the catalysts and the adhesion between the catalysts and the tube walls, determines the fluidity of the catalyst material. The angle of repose is one of the important material parameters that characterizes the static and dynamic mechanical properties of particulate materials. Studying the angle of repose is of great significance for understanding the accumulation of catalysts. The angle of repose is generally measured by the following method: a funnel is fixed at a certain height, and the powder falls freely from the funnel, accumulating into a cone at a certain angle. The angle of repose of the material is measured by measuring the inclination angle of the cone.

[0003] However, in the prior art, the existing angle of repose meter generally fixes the funnel at a certain height, allowing the particles to flow out naturally from the funnel onto the disc. The cohesive force between the spherical catalysts is small. When measured using the existing angle of repose meter, the feed rate cannot be controlled, and it is easy to splash around when falling onto the substrate. The slope angle of the cone accumulated on the substrate is often not a regular circle, resulting in an inaccurate measured angle of repose. On the other hand, the parameters used in the current angle of repose measuring device for calculating the angle of repose are mostly measured using absolute length. However, using the existing angle of repose meter, the top of the slope of the cone where the spherical catalysts are accumulated cannot form a complete cone angle, which may eventually cause the measured height or diameter of the accumulated body to fluctuate greatly, resulting in a large error in the measurement result. Utility Model Content

[0004] The purpose of the present disclosure is to provide a repose angle measuring device, which can make the material fall slowly, evenly and continuously into the material receiving unit and form an ideal cone with a regular slope, thereby improving the accuracy of repose angle measurement and reducing measurement errors.

[0005] In order to achieve the above-mentioned object, the present disclosure provides a repose angle measuring device, the measuring device comprising a feeding unit and a receiving unit; the feeding unit comprises a conveying module and a control module;

[0006] The conveying module includes a conveying surface that can convey materials in a horizontal direction, and the outlet of the conveying module is located above the inlet of the material receiving unit so that the materials from the feeding unit fall into the material receiving unit;

[0007] The control module is used to make the conveying surface vibrate in a vertical direction.

[0008] Optionally, the control module includes a controller and a driving component, the driving component is used to drive the vibration of the conveying surface, and the driving component is connected to the controller signal to control the conveying speed and vibration frequency of the conveying surface according to preset parameters.

[0009] Optionally, the conveying module includes a conveying trough, the conveying trough includes the conveying surface; the driving component includes a plurality of electromagnets, and the conveying trough is horizontally mounted on the plurality of electromagnets;

[0010] The vibration frequency of the conveying surface is 5~50HZ, and the conveying speed is 1~5 L / min.

[0011] Optionally, the feeding unit further includes a hopper, the outlet of the hopper being in communication with the inlet of the conveying module, for allowing the material to enter the conveying module from the hopper.

[0012] Optionally, the material receiving unit includes a material receiving hopper and a material stacking module located below the material receiving hopper;

[0013] The receiving funnel is arranged in a vertical direction, the outlet of the conveying module is higher than the inlet of the receiving funnel, and the outlet of the conveying module is located directly above the center of the receiving funnel; the receiving funnel and the stacking module are coaxially arranged to form a conical material pile in the stacking module.

[0014] Optionally, the inlet diameter of the receiving funnel is 100-140 mm, and the outlet diameter is 10 mm;

[0015] The stacking module includes a receiving tray, which is a glass disc with a diameter of 80-120 mm and a height of 20-30 mm;

[0016] The outlet of the receiving funnel is 50-70 mm higher than the receiving tray.

[0017] Optionally, the measuring device further comprises a measuring unit, and the measuring unit comprises a laser goniometer for measuring the angle of repose of the conical stockpile in the stockpile module.

[0018] Optionally, the measuring device further comprises a base plate, and the feeding unit and the receiving unit are fixed on the base plate via a first fixer and a second fixer respectively;

[0019] The first fixer includes a fixing rod and a first auxiliary frame, and the feeding unit is fixed to the fixing rod through the first auxiliary frame and bolts; the height of the feeding unit on the fixing rod is adjustable;

[0020] The second fixer includes a bracket and a second auxiliary bracket; the material receiving unit is fixed to the bracket through the second auxiliary bracket and bolts; the height of the material receiving unit on the bracket is adjustable.

[0021] Optionally, the substrate is marked with concentric circles with a diameter of 8 to 12 mm, and the centers of the concentric circles are coaxially arranged with the material receiving unit.

[0022] Optionally, the substrate is provided with a spirit level for correcting the tilt angle of the substrate relative to a horizontal plane; the spirit level comprises a bubble level.

[0023] Through the above technical solution, the angle of repose measuring device disclosed in the present invention includes a feeding unit and a receiving unit. The feeding unit includes a conveying module and a control module. The conveying surface of the conveying module causes the material to move in the horizontal direction and fall into the receiving unit. The control module controls the conveying surface of the conveying module to vibrate in the vertical direction, causing the material to vibrate vertically on the conveying module, further controlling the material conveying interval. The material falls into the receiving unit uninterruptedly and at a reasonable speed and forms an ideal cone with a regular slope, thereby improving the accuracy of the angle of repose measurement and reducing the measurement error.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0026] Figure 1 It is a schematic structural diagram of the measuring device of Example 1 of the present disclosure.

[0027] Figure 2 It is a partial schematic diagram of the structure of the measuring device of Example 1 of the present disclosure.

[0028] Figure 3 Schematic diagram of a substrate of the measuring device according to the first embodiment of the present disclosure.

[0029] Description of Reference Numerals

[0030] 1: Hopper; 2: Conveying module; 3: Control module; 4: Fixing rod; 5: Bracket; 6: Material receiving hopper; 7-1: First auxiliary rack; 7-2: Second auxiliary rack; 8: Stacking module; 9: Base plate; 10: Measuring unit; 11: Tripod; 12: Level. DETAILED DESCRIPTION

[0031] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0032] The present disclosure provides a device for measuring an angle of repose, the device comprising a feeding unit and a receiving unit; the feeding unit comprises a conveying module 2 and a control module 3;

[0033] The conveying module 2 includes a conveying surface that can convey materials in the horizontal direction. The outlet of the conveying module 2 is located above the inlet of the receiving unit so that the materials from the feeding unit fall into the receiving unit. The control module 3 is used to vibrate the conveying surface in the vertical direction.

[0034] The angle of repose measuring device disclosed in the present invention includes a feeding unit and a receiving unit. The feeding unit includes a conveying module and a control module. The conveying surface of the conveying module causes the material to move in the horizontal direction and fall into the receiving unit. The control module controls the conveying surface of the conveying module to vibrate in the vertical direction, causing the material to vibrate vertically on the conveying module, further causing the material to fall continuously into the receiving unit and form an ideal cone with a regular slope, thereby improving the accuracy of the angle of repose measurement.

[0035] According to one embodiment of the present disclosure, the control module 3 includes a controller and a drive component. The drive component is used to drive the vibration of the conveying surface. The drive component is connected to the controller signal and is used to control the conveying speed and vibration frequency of the conveying surface according to preset parameters. This embodiment facilitates controlling the conveying speed and vibration frequency of materials on the conveying module, facilitating the uninterrupted descent of materials into the receiving unit, forming an ideal cone with a regular slope, and improving the accuracy of angle of repose measurement.

[0036] According to one embodiment of the present disclosure, the conveyor module 2 includes a conveyor trough, which includes a conveyor surface; the driving component includes multiple electromagnets, and the conveyor trough is horizontally mounted on the multiple electromagnets; the vibration frequency of the conveyor surface is 5 to 50 Hz, and the conveying speed is 1 to 5 L / min. The above embodiment is conducive to controlling the conveying speed and vibration frequency of the material on the conveyor module, which helps to ensure that the material falls evenly and uninterruptedly into the receiving unit and forms an ideal cone with a regular slope, thereby improving the accuracy of the angle of repose measurement.

[0037] According to one embodiment of the present disclosure, the feeding unit further comprises a hopper 1, the outlet of the hopper 1 being connected to the inlet of the conveying module 2, for allowing the material to enter the conveying module from the hopper. The above embodiment is conducive to ensuring that the material falls evenly into the conveying module and avoids accumulation on the conveying module.

[0038] According to one embodiment of the present disclosure, the receiving unit includes a receiving hopper 6 and a stacking module 8 located below the receiving hopper 6. The receiving hopper 6 is vertically arranged, with the outlet of the conveying module 2 higher than the inlet of the receiving hopper 6, and the outlet of the conveying module 2 is located directly above the center of the receiving hopper 6. The receiving hopper 6 and the stacking module 8 are coaxially arranged to form a conical material pile in the stacking module. This embodiment facilitates the uniform and uninterrupted fall of material into the receiving unit, forming an ideal cone with a regular slope, thereby improving the accuracy of angle of repose measurement.

[0039] According to one embodiment of the present disclosure, the inlet diameter of the receiving funnel 6 is 100-140 mm, and the outlet diameter is 10 mm.

[0040] According to one embodiment of the present disclosure, the stacking module 8 includes a receiving tray, which is a glass disc with a diameter of 80-120 mm and a height of 20-30 mm.

[0041] According to one embodiment of the present disclosure, the outlet of the receiving funnel 6 is 50 to 70 mm higher than the receiving tray.

[0042] According to one embodiment of the present disclosure, the measuring device also includes a base plate 9, and the feeding unit and the receiving unit are fixed on the base plate by a first fixture and a second fixture respectively; the first fixture includes a fixing rod and a first auxiliary frame, and the feeding unit is fixed to the fixing rod by the first auxiliary frame and bolts; the height of the feeding unit on the fixing rod is adjustable; the second fixture includes a bracket and a second auxiliary frame; with the horizontal plane of the base plate as the starting position, the bracket is marked with a scale of 0~100mm; the receiving unit is fixed to the bracket by the second auxiliary frame and bolts; the height of the receiving unit on the bracket is adjustable.

[0043] According to one embodiment of the present disclosure, the measuring device further includes a measuring unit 10, which includes a laser goniometer for measuring the angle of repose of the conical stockpile in the stockpile module. The laser goniometer has an accuracy of -0.1° to 0.1° and can measure the angle of the conical stockpile through 360°. In a further embodiment, the laser goniometer is mounted on a baseplate via a tripod, and the tripod body is movable along the circumference of the receiving tray. This embodiment eliminates the need to measure the height and diameter of the conical stockpile, which improves the accuracy of the measurement results and reduces measurement errors.

[0044] According to one embodiment of the present disclosure, the substrate 9 is marked with concentric circles with diameters of 8 to 12 mm, the centers of which are coaxial with the receiving unit. This facilitates the coaxial arrangement of the conveyor module's outlet, the receiving unit, and the stacking module, resulting in a more ideal slope for the conical material pile formed in the stacking module, improving the accuracy of measurement results and reducing measurement errors.

[0045] According to one embodiment of the present disclosure, the substrate 9 is provided with a level 12 for correcting the tilt angle of the substrate relative to the horizontal plane; the level includes a bubble level.

[0046] According to one embodiment of the present disclosure, the material may be spherical particles, such as a spherical catalyst or a spherical catalyst carrier. The measuring device of the present disclosure can also be used to measure the angle of repose of common bulk materials, and the material receiving unit and stacking module can be replaced as needed.

[0047] A second aspect of the present disclosure further provides a method for measuring the angle of repose using the angle of repose measuring device according to the first aspect of the present disclosure, the method comprising:

[0048] The material enters the feeding unit, and the conveying module conveys the material horizontally to the top of the entrance of the receiving unit. Under the action of its own gravity, the material falls into the receiving unit and forms a conical material pile in the receiving unit. When the material overflows from the four sides of the receiving unit, the material feeding is completed.

[0049] After the material stops flowing for 2 minutes, use the measuring unit to measure the conical material pile in the material docking unit; repeat several times and calculate the average value as the repose angle of the material.

[0050] The present disclosure is further illustrated below by way of examples, but the present disclosure is not limited thereby.

[0051] The reforming catalyst used in Example 1 was purchased from the Changling Catalyst Company, with the item number PS-VI. The reforming catalyst carrier used in Example 2 was purchased from Sosal Company, with the item number K5357. The laser goniometer was Duke L1-1.

[0052] Example 1

[0053] like Figures 1-3 As shown, the measuring device of this embodiment includes a base plate 9, a feeding unit, a receiving unit and a measuring unit 10; the feeding unit includes a hopper 1, a conveying module 2 and a control module 3; the feeding unit is fixed to a fixing rod 4 by a first auxiliary frame 7-1 and bolts, and the height of the feeding unit on the fixing rod is adjustable; the receiving unit includes a receiving hopper 6 and a stacking module 8, and the receiving hopper 6 is fixed to a bracket 5 by a second auxiliary frame 7-2; the height of the receiving hopper 6 on the bracket is adjustable;

[0054] The outlet of the hopper 1 is connected to the inlet of the conveying module 2, so that the material can enter the conveying module from the hopper; the conveying module 2 includes a conveying surface that can convey the material in a horizontal direction, and the outlet of the conveying module 2 is located above the inlet of the receiving funnel 6 so that the material from the feeding unit falls into the receiving unit; the conveying module 2 includes a conveying trough, which includes a conveying surface; the control module 3 includes a controller and a driving component, which is used to drive the vibration of the conveying surface, and the driving component is connected to the controller signal to control the conveying speed and vibration frequency of the conveying surface according to preset parameters; the driving component includes two electromagnets, and the conveying trough is mounted on the two electromagnets in a horizontal direction, and the power of the electromagnet is 24W;

[0055] The receiving funnel 6 is arranged in a vertical direction, the outlet of the conveying module 2 is higher than the inlet of the receiving funnel 6, and the outlet of the conveying module 2 is located directly above the center of the receiving funnel; the receiving funnel 6 is coaxially arranged with the stacking module 8, so as to form a conical material pile in the stacking module; the inlet diameter of the receiving funnel 6 is 140 mm, and the outlet diameter is 10 mm; the stacking module 8 includes a glass disc with a diameter of 100 mm and a height of 25 mm; the outlet of the receiving funnel 6 is 75 mm higher than the glass disc; the substrate 9 is marked with concentric circles with a diameter of 10 mm, and the center of the concentric circles is coaxial with the center of the glass disc; the substrate 9 is provided with a spirit level 12 for correcting the inclination angle of the substrate relative to the horizontal plane; the spirit level 12 includes a bubble level;

[0056] The measuring unit 10 includes a laser goniometer, which is vertically mounted on a base plate via a tripod 11 and is used to measure the angle of repose of the conical material pile in the material pile module.

[0057] The angle of repose of the reforming catalyst was measured using the above-mentioned measuring device in the following manner:

[0058] At the start of the test, adjust the baseplate bolts so that the bubble in the bubble level on the baseplate is centered. Use the concentric circle scales on the baseplate to position the glass disc on the baseplate so that the center of the glass disc container is aligned with the axis of the receiving funnel. Adjust the distance between the receiving funnel and the glass disc so that the glass disc is 75 mm below the outlet of the receiving funnel. Place the laser goniometer upright on the baseplate and adjust the tripod height so that the laser goniometer and the estimated height of the cone material pile are at the same level. Turn on the laser goniometer and calibrate it.

[0059] Use a graduated cylinder to take an appropriate amount of 30g of catalytic reforming catalyst sample and pour it into hopper 1. Set the conveying speed of the conveying trough to 1.5 L / min and the vibration frequency of the electromagnet to 50 Hz on the controller. The reforming catalyst enters the conveying trough from hopper 1. The conveying trough moves the reforming catalyst along the horizontal conveying surface to the top of the receiving funnel 6. Under the action of gravity, the reforming catalyst falls evenly and uninterruptedly through the receiving funnel into the glass disc, and finally accumulates on the glass disc until the catalyst overflows evenly from all sides of the disc, completing the feeding.

[0060] Two minutes after the reforming catalyst particle flow ceased, a laser goniometer was used to measure the angle of the catalyst cone, yielding a value of φ of 24.8°. This measurement was repeated four times, yielding results of 24.9°, 24.7°, 24.8°, and 24.9°, respectively. Taking the average of these five measurements, the angle of repose for the catalytic reforming catalyst was 24.8°, with an average deviation of 0.06.

[0061] Example 2

[0062] This embodiment is the same as Example 1, except that Example 2 measures the angle of repose of a reforming catalyst carrier. Five measurements were performed using the same method as Example 1, yielding results of 25.9°, 25.7°, 25.8°, 25.7°, and 25.8°, respectively. The average of these five measurements yielded an angle of repose of 25.8° for the reforming catalyst carrier, with an average deviation of 0.06. The measuring device disclosed herein can also be used to measure the angle of repose of a reforming catalyst carrier, with a low average deviation and high accuracy and reproducibility of the measurement results.

[0063] Example 3

[0064] The method of this embodiment is the same as that of Example 1, except that the conveying speed of the conveying trough is set to 8 L / min and the vibration frequency is 10 Hz. The same method as Example 1 is used 5 times, and the results obtained are 24.1°, 24.8°, 23.0°, 22.9°, and 25.0°, respectively. The average value of the 5 measurements is taken, and the repose angle is 24.0°, with an average deviation of 0.8.

[0065] Comparative Example 1

[0066] This comparative example 1 is the same as example 1, except that no feeding unit is provided in comparative example 1; an appropriate amount of reforming catalyst is poured into the receiving funnel 6, so that the reforming catalyst falls into the glass disc in the receiving funnel to form a conical material pile. The conical material pile is measured with a laser angle meter, and the structures are measured 5 times, respectively, 23.2°, 24.9°, 25.7°, 26.2°, and 25.4°. The average value of the 5 measurements is taken, and the repose angle is 25.1°, and the average deviation is 0.82.

[0067] The angle of repose measuring device disclosed in the present invention can be used to test the angle of repose of reforming catalysts and catalyst carriers, and has a small average deviation, and the repeatability and accuracy of the measurement results are higher.

[0068] By comparing Example 1 with Comparative Example 1, it can be seen that the feeding unit of Example 1 includes a conveying module and a control module, which can control the conveying range and conveying speed of the material on the conveying module, so that the material falls into the receiving unit evenly and uninterruptedly, and the slope of the conical material pile formed is more ideal, the repeatability and accuracy of the measurement results are improved, and the measurement error is reduced.

[0069] By comparing Example 1 with Example 3, it can be seen that within the vibration frequency and conveying speed range of the conveying surface disclosed in the present invention, the slope of the conical material pile formed by the material falling into the material receiving unit is more ideal, the average deviation of the measurement results is smaller, and the repeatability and accuracy are higher.

[0070] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0071] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0072] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A device for measuring an angle of repose, characterized in that: The measuring device comprises a feeding unit and a receiving unit; the feeding unit comprises a conveying module (2) and a control module (3); The conveying module (2) comprises a conveying surface capable of conveying materials in a horizontal direction, and the outlet of the conveying module (2) is located above the inlet of the receiving unit so that the materials from the feeding unit fall into the receiving unit; The control module (3) is used to make the conveying surface vibrate in the vertical direction.

2. The measuring device according to claim 1, characterized in that The control module (3) comprises a controller and a driving component, wherein the driving component is used to drive the vibration of the conveying surface, and the driving component is connected to the controller signal and is used to control the conveying speed and vibration frequency of the conveying surface according to preset parameters.

3. The measuring device according to claim 2, characterized in that The conveying module (2) comprises a conveying trough, and the conveying trough comprises the conveying surface; the driving component comprises a plurality of electromagnets, and the conveying trough is mounted on the plurality of electromagnets in a horizontal direction; The vibration frequency of the conveying surface is 5~50HZ, and the conveying speed is 1~5 L / min.

4. The measuring device according to claim 1, characterized in that The feeding unit further comprises a hopper (1), the outlet of the hopper (1) being in communication with the inlet of the conveying module (2) for allowing the material to enter the conveying module from the hopper.

5. The measuring device according to claim 1, characterized in that The material receiving unit comprises a material receiving hopper (6) and a material stacking module (8) located below the material receiving hopper (6); The receiving funnel (6) is arranged in a vertical direction, the outlet of the conveying module (2) is higher than the inlet of the receiving funnel (6), and the outlet of the conveying module (2) is located directly above the center of the receiving funnel; the receiving funnel (6) and the stacking module (8) are arranged coaxially to form a conical material pile in the stacking module.

6. The measuring device according to claim 5, characterized in that The inlet diameter of the receiving funnel (6) is 100-140 mm, and the outlet diameter is 10 mm; The stacking module (8) comprises a receiving plate, which is a glass disc with a diameter of 80-120 mm and a height of 20-30 mm; The outlet of the receiving funnel is 50-70 mm higher than the receiving tray.

7. The measuring device according to claim 5, characterized in that The measuring device further comprises a measuring unit (10), wherein the measuring unit (10) comprises a laser angle meter for measuring the angle of repose of the conical stockpile in the stockpile module.

8. The measuring device according to claim 1, characterized in that The measuring device further comprises a base plate (9), and the feeding unit and the receiving unit are fixed on the base plate via a first fixer and a second fixer respectively; The first fixer comprises a fixing rod (4) and a first auxiliary frame (7-1), and the feeding unit is fixed to the fixing rod (4) via the first auxiliary frame and bolts; the height of the feeding unit on the fixing rod is adjustable; The second fixer comprises a bracket (5) and a second auxiliary frame (7-2); the material receiving unit is fixed to the bracket (5) via the second auxiliary frame (7-2) and bolts; and the height of the material receiving unit on the bracket is adjustable.

9. The measuring device according to claim 8, characterized in that The substrate (9) is marked with concentric circles with a diameter of 8 to 12 mm, and the center of the concentric circle is coaxially arranged with the material receiving unit.

10. The measuring device according to claim 8, characterized in that The substrate (9) is provided with a level (12) for correcting the inclination angle of the substrate relative to a horizontal plane; the level comprises a bubble level.

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