Rapid and uniform discharging device in Hardgrove grindability index determination process

Abstract

The utility model provides a rapid and uniform feeding device in a Hardgrove grindability index measuring process, which comprises a grinding bowl internally provided with eight steel balls, and is characterized in that a conical distributor with a big lower part and a sharp upper part is arranged in the grinding bowl, and the upper end of the conical distributor is movably connected with a circular truncated cone receiving hopper with a big upper part and a small lower part. Eight steel balls in the grinding bowl are evenly fixed through the conical distributor, coal is evenly distributed among the eight steel balls in the grinding bowl through the two stacked conical hoppers, the small ends of the conical hoppers are connected, the large ends of the conical hoppers are upward and downward respectively, the coal is evenly ground through the evenly-distributed steel balls, detection errors are reduced, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a material discharging device, in particular to a fast and uniform material discharging device in the process of measuring the Hastelloy grindability index, and belongs to the technical field of detection device design and manufacturing. Background Art

[0002] The grindability of coal is a comprehensive physical property related to the hardness, strength, toughness and brittleness of coal, and is related to the age of coal formation, coal rock structure, type and distribution of coal mines. At present, the Hardgrove Grindability Index HGI is commonly used internationally to measure the grindability of coal. The Hardgrove Grindability Index HGI is a dimensionless physical quantity, and its value can reflect the relative difficulty of crushing different coal samples into powder. The larger the HGI value, the finer the fineness of the powder of the same amount of coal samples of specified particle size under the condition of consuming a certain amount of energy, or the less energy is consumed to grind the same amount of coal samples of specified particle size into the same fineness. The Hardgrove instrument is mostly used to detect the grindability index of coal. During the detection process, the sample is directly introduced into the grinding bowl. Since the eight steel balls in the grinding bowl are not placed at equal distances, and the poured sample is random, it often leads to deviations in the grinding results, which in turn affects the accuracy of coal grindability detection. Therefore, it is necessary to improve the existing technology. Utility Model Content

[0003] In order to reduce the deviation of grinding results as much as possible and ensure the accuracy of coal grindability detection, the utility model provides a fast and uniform material discharge device in the process of Hardgrove grindability index determination.

[0004] The utility model is completed through the following technical scheme: a device for quickly and evenly discharging materials during the determination of the Hastelloy grindability index, comprising a grinding bowl with eight steel balls inside, characterized in that a conical distributor with a larger bottom and a pointed top is arranged inside the grinding bowl, and a round table receiving hopper with a larger top and a smaller bottom is movably connected to the upper end of the conical distributor, so that when discharging materials, the eight steel balls in the grinding bowl are evenly fixed by the conical distributor, so that the coal is evenly distributed among the eight steel balls in the grinding bowl, and the coal is evenly ground by the evenly distributed steel balls, thereby reducing detection errors and improving work efficiency.

[0005] The conical distributor with a large bottom and a pointed top is an inverted cone, and the surface of the cone is the material discharge surface, so that the coal material can fall evenly between the eight steel balls in the grinding bowl.

[0006] The upper and lower ends of the circular cone receiving hopper with a larger upper part and a smaller lower part are both open ends, and at least two horizontal rods are provided at the lower open end. The outer ends of the horizontal rods are fixed to the inner wall of the lower open end, and the inner ends are suspended in the air, so that the suspended inner ends can be placed on the conical distributor below, thereby facilitating the coal to fall from top to bottom through the surface of the conical distributor to between the eight steel balls in the grinding bowl.

[0007] The bottom diameter of the conical distributor with a larger bottom and a sharper top is adapted to the inner circle surrounded by the eight steel balls at the center of the grinding bowl, which is 4.5 cm in this embodiment.

[0008] The overall height of the conical distributor and the truncated cone receiving hopper is 8-13 cm.

[0009] The utility model has the following beneficial effects and advantages: by adopting the above technical scheme, that is, by using a conical distributor to evenly fix the eight steel balls in the grinding bowl, and by using two stacked conical buckets with small ends connected and large ends facing upward and downward respectively, the coal is evenly distributed between the eight steel balls in the grinding bowl, the coal is evenly ground by the evenly distributed steel balls, detection errors are reduced, and work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0012] like Figure 1 As shown, the utility model provides a fast and uniform material discharging device in the process of measuring the Hastelloy Grindability Index, comprising a grinding bowl 1 with eight steel balls 2, a conical material distributor 3 with a large bottom and a pointed top is arranged in the grinding bowl 1, and a round table receiving hopper 4 with a large top and a small bottom is movably connected to the upper end of the conical material distributor 3;

[0013] The conical distributor 3 with a large bottom and a pointed top is an inverted cone, and the surface of the cone is the feeding surface, so that the coal material can fall evenly between the eight steel balls 2 in the grinding bowl 1;

[0014] The upper and lower ends of the truncated cone receiving hopper 4, which is larger at the top and smaller at the bottom, are both open ends, and two horizontal rods 5 are provided at the lower open end, the outer ends of the horizontal rods 5 are fixed to the inner wall of the lower open end, and the inner ends are suspended in the air, so that the suspended inner ends are conveniently placed on the conical distributor 3 below, thereby facilitating the coal to fall from top to bottom through the surface of the conical distributor 3 to between the eight steel balls 2 in the grinding bowl 1;

[0015] The bottom diameter of the conical distributor 3 with a large bottom and a pointed top is adapted to the inner circle surrounded by the eight steel balls at the center of the grinding bowl, which is 4.5 cm in this embodiment;

[0016] The overall height of the conical distributor 3 and the truncated cone receiving hopper 4 is 8-13 cm.

[0017] During operation, the conical divider 3 is placed in the grinding bowl 1. After the eight steel balls 2 in the grinding bowl 1 are evenly fixed by the lower end of the conical divider 3, the truncated cone hopper 4 is placed on the conical divider 3. The test coal is put into the top of the truncated cone hopper 4 so that the coal is evenly distributed between the eight steel balls 2 in the grinding bowl 1 through the surfaces of the truncated cone hopper 4 and the conical divider 3. After the feeding is completed, the truncated cone hopper 4 and the conical divider 3 are taken out, and the grinder is started. The coal can be evenly ground by the evenly distributed steel balls, thereby reducing detection errors and improving work efficiency.

Claims

1. A device for quickly and evenly discharging materials during the determination of the Hastelloy Grindability Index, comprising a grinding bowl with eight steel balls, characterized in that A conical material distributor which is large at the bottom and pointed at the top is arranged in the grinding bowl, and a round table material receiving hopper which is large at the top and small at the bottom is movably connected to the upper end of the conical material distributor.

2. The device for rapidly and uniformly discharging materials during the determination of the Hardgrove grindability index according to claim 1, characterized in that The conical distributor with a larger bottom and a sharper top is an inverted cone, and the surface of the cone is the material discharge surface.

3. The device for rapid and uniform material discharge in the process of measuring the Hardgrove grindability index according to claim 1, characterized in that The upper and lower ends of the circular platform receiving hopper with a larger upper portion and a smaller lower portion are both open ends, and at least two horizontal rods are arranged at the lower open end, the outer ends of the horizontal rods are fixed to the inner wall of the lower open end, and the inner ends are suspended.

4. The device for rapidly and uniformly discharging materials during the determination of the Hardgrove grindability index according to claim 1, characterized in that The bottom diameter of the conical distributor with a larger bottom and a sharper top is adapted to the inner circle surrounded by eight steel balls at the center of the grinding bowl.

5. The device for rapid and uniform material discharge in the process of measuring the Hardgrove grindability index according to claim 1, characterized in that The overall height of the conical distributor and the truncated cone receiving hopper is 8-13 cm.

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