Powder grinding equipment

Abstract

A powder crushing device is provided. The apparatus includes an internal chamber 11 having a cabin 1 under negative pressure, a crushing / refining / powder sorting unit is installed in the internal chamber, and a coarse crushing unit 2 is installed coaxially below the crushing / refining / powder sorting unit, and a transmission mechanism operates to transmit the crushing / refining / powder sorting unit and the coarse crushing unit synchronously. The coarse crushing unit includes a lower impeller 21 and a grinding ring gear 22, the lower impeller is connected coaxially to the crushing / refining / powder sorting unit, and the grinding ring gear is installed on the wall surface of the internal chamber. The surface of the grinding ring gear corresponding to the lower impeller is a grinding tooth surface 221 formed by arranging a plurality of grinding ratchets at an angle.

Description

[Technical field]

[0001] The present invention relates to a powder grinding device, and more particularly to a new device for achieving the effect of finely refining powder through a dry grinding method. [Background technology]

[0002] A common powder grinding method involves placing two grinding tools against each other to apply pressure to the powder, and grinding and refining the powder through the grinding pressure exerted by the two grinding tools on the powder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] China Registered Utility Model No. 1483516 [Patent Document 2] JP 2002-079133 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional grinding method, when the particle size of the powder is smaller than the uneven structure of the grinding surface of the grinding tool, grinding is ineffective. In addition, such a facing grinding method generates high temperatures, which causes the powder to deteriorate.

[0005] In the conventional patent documents, for example, Patent Document 1 and Patent Document 2 mentioned above, a method is disclosed in which high-speed powder transmission is achieved by using airflow injection or a special nozzle structure, and the powder is collided and refined at the same time. However, since the mass of the powder is very small, the efficiency is quite low whether it is collision or crushing, and the high-pressure airflow causes the powder to flow out of the cabin at high speed, so the powder refinement method has the disadvantage that the electrical energy consumption is very high but the productivity is very low.

[0006] Therefore, the inventor believed that the above-mentioned shortcomings could be improved, and after extensive research, he came up with the present invention, which effectively improves the above-mentioned problems through rational design.

[0007] The present invention has been made in view of the above circumstances, and its purpose is to provide a powder crushing device, which adopts dry impact crushing and refining technology, and uses a coarse grinding unit at the bottom of the cabin to perform coarse grinding on large particles of powder that cannot be lifted by the whirlwind in the chamber, thereby shortening the time series of the subsequent fine grinding and improving the powder crushing efficiency. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention adopts the following measures. A powder grinding device according to one embodiment of the present invention comprises a cabin having an internal chamber with a negative pressure, a grinding / refining / powder sorting unit is installed in the internal chamber, and a coarse grinding unit is installed coaxially below the grinding / refining / powder sorting unit. The coarse grinding unit includes a lower impeller and a grinding ring gear, the lower impeller is installed coaxially with the grinding / refining / powder sorting unit and is operated to transmit synchronously by a transmission mechanism, the grinding ring gear is installed on the wall surface of the internal chamber, the grinding ring gear has a grinding tooth surface on a surface corresponding to the lower impeller, the grinding tooth surface is formed by a plurality of grinding ratchets arranged at an angle, the combination of the rotating lower impeller and the grinding tooth surface performs rough grinding on the powder in the internal chamber, and when the grinding ratchets are arranged at an angle, a flow path is formed in the valley part of the adjacent grinding ratchets to guide the moving direction of the powder. The powder crushing device further includes a material supplying unit, a regrinding unit, and a collecting unit. The material supplying unit feeds powder to be ground into the internal chamber. The crushing, refining, and powder sorting unit crushes, refines, and powder sorts the powder roughly ground by the coarse crushing unit. The regrinding unit removes powder that does not reach the target particle size from the internal chamber, and then feeds the powder back into the internal chamber, where it is roughly ground again by the coarse crushing unit and / or crushed, refined, and powder sorted again by the crushing, refining, and powder sorting unit. The collecting unit collects the powder that has been crushed and refined to reach the target particle size.

[0009] In addition, in the powder crushing device according to the present invention, the lower impeller has a plurality of blades, which are arranged equiangularly spaced apart along the radial direction of the lower impeller.

[0010] In addition, in the powder crushing device of the present invention, the regrinding unit includes the upper regrinding unit and the lower regrinding unit, the powder outlet end of the upper regrinding unit corresponds to the upper stage of the crushing, refining and powder sorting unit, the powder inlet end of the upper regrinding unit corresponds to the lower stage of the crushing, refining and powder sorting unit, the powder outlet end of the lower regrinding unit corresponds to the coarse crushing unit, and the powder inlet end of the lower regrinding unit corresponds to the lower stage of the crushing, refining and powder sorting unit.

[0011] In addition, in the powder grinding device of the present invention, the introduction end of the powder waiting to be ground of the material supply unit corresponds to the lower stage of the grinding / refining / powder sorting unit.

[0012] At least the following points will become apparent from the following specification and drawings. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view showing an external appearance of a powder crushing device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view showing the appearance of a powder crushing device according to another embodiment of the present invention. [Diagram 3] 2 is a perspective view showing an internal chamber of a powder crushing device according to an embodiment of the present invention; FIG. [Figure 4] 1 is a front cross-sectional view showing a powder crushing device according to an embodiment of the present invention. [Diagram 5] 1 is a top cross-sectional view showing a powder crushing device according to an embodiment of the present invention. [Figure 6] FIG. 2 is a particle size analysis diagram showing collagen after grinding and purification using a powder grinding device according to one embodiment of the present invention, where (a) to (d) show observations of different samples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the embodiment of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to the following examples, and can be modified as desired without departing from the spirit and scope of the present invention.

[0015] First, the powder crushing device according to the present invention will be specifically described with reference to Figs.

[0016] The powder crushing device according to the present invention includes a cabin 1, a coarse crushing unit 2, a crushing / refining / powder sorting unit 3, a transmission mechanism 4, a material supply unit 5, a regrind unit 6, and a collection unit 7. The configuration of each component will be described below.

[0017] The cabin 1 has an internal chamber 11 which exhibits a negative pressure.

[0018] The coarse grinding unit 2 is installed in the internal chamber 11 and is located at the bottom of the internal chamber 11. The coarse grinding unit 2 includes a lower impeller 21 and a grinding ring gear 22, and the grinding ring gear 22 is installed on the wall surface of the internal chamber 11 and corresponds to the lower impeller 21. The grinding ring gear 22 has a grinding tooth surface 221 on a surface corresponding to the lower impeller 21, and the grinding tooth surface 221 is formed by arranging a plurality of grinding ratchets a at an inclination. The lower impeller 21 and the grinding tooth surface 221 during rotation are combined to perform rough grinding on the powder in the internal chamber 11. When the grinding ratchets a are arranged at an inclination, a flow path b corresponding to the inclination is formed in the valley portion of the two adjacent grinding ratchets a, and the flow path b can guide the moving direction of the powder. In addition, in a preferred embodiment, the lower impeller 21 includes a plurality of blades 211 that are equiangularly spaced apart along the radial direction of the lower impeller 21 .

[0019] The crushing / refining / powder sorting unit 3 crushes and refines the roughly ground powder by a collision method, and also selects powder that has reached a target particle size after refinement, and causes it to enter the collecting unit 7.

[0020] The transmission mechanism 4 is installed coaxially with the lower impeller 21 of the coarse crushing unit 2 and the crushing, refining, and powder sorting unit 3, and is operated by the transmission mechanism 4 to transmit the lower impeller 21 and the crushing, refining, and powder sorting unit 3 synchronously.

[0021] The material supply unit 5 automatically introduces the powder to be ground into the internal chamber 11 by the Venturi effect. The material supply introduction end 51 of the material supply unit 5 communicates with the internal chamber 11 and corresponds to the lower stage of the crushing / refining / powder sorting unit 3.

[0022] The regrinding unit 6 discharges the powder that does not reach the target particle size during the pulverization and refining process into the internal chamber 11, and then reintroduces it into the internal chamber 11 to perform the rough grinding and / or pulverization and refining process again. In a preferred embodiment, the introduction and discharge of the powder is achieved by utilizing the Venturi effect. In a preferred embodiment, the regrinding unit 6 includes an upper regrinding unit 61 and a lower regrinding unit 62. The upper regrinding unit 61 has an outlet end 611 and an inlet end 612 that are connected to the internal chamber 11, and the outlet end 611 corresponds to the upper stage of the pulverization, refining, and powder sorting unit 3, and the inlet end 612 corresponds to the lower stage of the pulverization, refining, and powder sorting unit 3. The lower regrind unit 62 also has an outlet end 621 and an inlet end 622 connected to the internal chamber 11, the outlet end 621 corresponding to the coarse crushing unit 2, and the inlet end 622 corresponding to the lower stage of the crushing / refining / powder sorting unit 3.

[0023] The collecting unit 7 concentrates and collects the refined powder that has reached the target particle size and has been selected by the crushing / refining / powder sorting unit 3.

[0024] During grinding, the material supply unit 5 inputs the powder to be ground into the internal chamber 11 from the material supply introduction end 51, and at the same time, the transmission mechanism 4 drives the lower impeller 21 of the coarse grinding unit 2 and the grinding, refining, and powder sorting unit 3 to operate. At this time, the powder to be ground that has entered the internal chamber 11 is swung by the lower impeller 21 and floats up, and depending on the position at which it floats up, it collides with the grinding tooth surface 221 of the grinding ring gear 22 or the rotating grinding, refining, and powder sorting unit 3, so that the powder to be ground is crushed. When the finely refined powder passes through the through hole 31 of the grinding, refining, and powder sorting unit 3 rotating at high speed, it indicates that the powder has reached the target particle size, and is concentrated and collected by the collection unit 7.

[0025] Powders with large particle size are shaken off around the crushing / refining / powder sorting unit 3 by the action of centrifugal force, and enter the upper regrinding unit 61 or the lower regrinding unit 62 through the discharge end 611 or the discharge end 621 according to the position where they are shaken off, and the upper regrinding unit 61 and the lower regrinding unit 62 send the powder back into the inner chamber 11 through the inlet end 612 or the inlet end 622 by the Venturi effect. Then, the crushing / refining process is carried out, and the purpose of refining the powder to the target particle size is achieved by the dry grinding method.

[0026] Figure 6 shows the particle size analysis of collagen after it is crushed and refined by the powder grinding device of the present invention. As shown in Figure 6(a)-(d), after collagen is finely refined by the powder grinding device of the present invention, the collagen powder has a polygonal shape and a particle size D97 of less than 8 μm.

[0027] The above description is for the purpose of explaining the present invention, and should not be interpreted as limiting the invention described in the scope of the utility model registration claims or restricting the scope. In addition, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications are possible within the technical scope described in the scope of the utility model registration claims. [Explanation of symbols]

[0028] 1 Cabin 11 Inner Chamber 2 Coarse grinding unit 21 Lower impeller 211 Wings 22 Grinding ring gear 221 Ground tooth surface a Grinding ratchet b Flow path 3 Crushing, refining and powder sorting unit 31 Through Hole 4 Transmission mechanism 5 Material supply unit 51 Material supply introduction end 6 Regrinding unit 61 Upper Regrinding Unit 611 Lead-out end 612 Introductory end 62 Lower Regrinding Unit 621 Lead-out end 622 Introductory end 7 Collection Unit

Claims

1. A powder crushing device, comprising: a cabin having an internal chamber exhibiting a negative pressure; a crushing / refining / powder sorting unit installed in the internal chamber; a coarse crushing unit installed coaxially below the crushing / refining / powder sorting unit; the coarse crushing unit including a lower impeller and a grinding ring gear; the lower impeller installed coaxially with the crushing / refining / powder sorting unit and operated to transmit synchronously by a transmission mechanism; the grinding ring gear installed on a wall surface of the internal chamber; the grinding ring gear has a grinding tooth surface on a surface corresponding to the lower impeller; the grinding tooth surface is formed by a plurality of grinding ratchets arranged at an angle; the combination of the rotating lower impeller and the grinding tooth surface performs rough grinding on the powder in the internal chamber; the grinding ratchets are arranged at an angle. In the lined-up state, a flow path is formed in the valley portion of the adjacent grinding ratchets to guide the direction of travel of the powder, and the powder crushing device further comprises a material supply unit, a regrinding unit, and a collecting unit, wherein the material supply unit feeds the powder to be ground into the internal chamber, the crushing / refining / powder sorting unit crushes, refines, and powder sorts the powder roughly ground by the coarse crushing unit, the regrinding unit removes powder that does not reach the target particle size from the internal chamber by the Venturi effect, and then sends it back into the internal chamber, where it is roughly ground again by the coarse crushing unit and / or crushed, refined, and powder sorted again by the crushing / refining / powder sorting unit, and the collecting unit collects the powder that has been crushed and refined to reach the target particle size.

2. 2. The powder crushing device according to claim 1, wherein the lower impeller includes a plurality of blades, the plurality of blades being equiangularly spaced apart along a radial direction of the lower impeller.

3. The powder crushing device of claim 1 or 2, characterized in that the regrinding unit comprises an upper regrinding unit and a lower regrinding unit, a powder discharge end of the upper regrinding unit corresponds to the upper stage of the crushing, refining, and powder sorting unit, a powder inlet end of the upper regrinding unit corresponds to the lower stage of the crushing, refining, and powder sorting unit, a powder discharge end of the lower regrinding unit corresponds to the coarse crushing unit, and a powder inlet end of the lower regrinding unit corresponds to the lower stage of the crushing, refining, and powder sorting unit.

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