TWI399248B - Particle separator - Google Patents

Description

Powder separation device

The invention relates to a powder separating device, in particular to a powder separating device applied to a powder grinding machine.

In recent years, due to the improvement of the quality of life, the requirements of relatively industrial standards have become stricter, especially after the development of environmental awareness and the establishment of GMP standards for food and pharmaceutical manufacturing, one can meet 1. Ingredients 2. Noise 3 The iron powder (mainly due to grinding wheel loss) 4. Temperature 5. Pollution and other strict GMP standards of the powder machine, it is particularly eager.

Sub-press, a well-designed powder machine must consider five major factors: 1. Torque 2. Centrifugal force 3. Destructive force 4. Temperature 5. Noise. In addition, the design of the separation device of the powder mill is also related to the grinding efficiency of the powder mill and the ability to grind fine powder. Conventional separation devices are incapable of effectively separating powder particles that have reached the particle size requirement and have not reached the particle size, thereby reducing the grinding efficiency of the powder mill and making the powder machine unable to achieve the true micronized powder particle size.

In the case of the "Powder Mill" of the Republic of China Patent No. 093106759 (No. 1297287), the inventor proposes a vertical pressure type powder grinding machine having a separating device, wherein the separating device used utilizes a plurality of high-speed rotating separating blades. The vortex flow generated by the ventilating device drives the powder particles entrained in the ascending airflow by centrifugal force, so that the coarser powder particles are subjected to centrifugal force, and are outwardly opened, and fall back to the grinding device again. The grinding is carried out, and only the finer powder is allowed to pass through the separating device and collected by the powder collecting device.

In the separation device of the powder grinding device, although the function of effectively separating the thickness of the powder particles can be achieved, if the purpose of controlling or adjusting the particle size of the powder is further achieved, it is necessary to adjust the flow of the powder to the ascending air. The size of the wind, or the speed of rotation of the separating blades, is achieved. However, whether it is the wind force of the pumping wind or the speed of the separating blades, because of the computation of fluid mechanics, it is difficult to obtain accurate control parameters and it is easy to generate control. Stable situation.

In view of this, the present inventors have further developed a powder separating device with a simple adjustment of the size of the powder to improve the operation of the powder separating device.

The main object of the present invention is to provide a powder separation device which can be easily operated and precisely adjusts the diameter of the powder particles for screening, and mainly comprises: a two-ring frame which is arranged above and below a transmission shaft; and a plurality of separation blades , is disposed around the two ring frame. Wherein the two ring frames are provided with a plurality of mutually corresponding holes, and each of the separating blades is disposed on a side of the ring frame and is provided with a plurality of holes that can be inserted into the plurality of holes, and can be quickly inserted into the holes. The plurality of separating blades are rotatably mounted on the ring frame.

The total number of holes provided in each of the aforementioned ring frames is an integer number of non-prime numbers, so that each of the separating blades can be disposed on the ring frame with each factor of the total number of the plurality of holes as a separation distance between each of the two separating blades. Therefore, the user can quickly adjust the number of the separation blades mounted on the ring frame and the spacing of the holes, and maintain the weight balance of the separation blades mounted on the ring frame.

Therefore, the separating device of the present invention can quickly adjust the manner of the number and spacing of the separation blades, and change the intensity of the vortex flow generated by the separation device, thereby achieving the purpose of adjusting the particle size of the powder.

The present invention has been made in view of the above-described and other objects, the technical means, the components and the effects thereof, and the preferred embodiments are described in detail below with reference to the related drawings.

As shown in Fig. 1 and Fig. 2, it is a structure of a mill in which the powder separating apparatus of the present invention is installed. The milling machine 10 is an upright vertical mill having a substantially cylindrical body 11 in which a grinding device 20 is disposed in the space of the lower half of the body 11 and is at the upper end of the body 11. In the space, a separating device 30 is provided.

As shown in FIG. 2, at the upper end of the body 11, an air outlet 12 is provided, which can be connected to a powder collecting device 40. The powder collecting device 40 has a draft pipe 41 connected to the air extracting port 12, which can be ground. The air inside the body 11 of the powder machine 10 is taken out from the exhaust opening 12 at the top end, and the powder after the grinding machine 10 is ground is sucked into the collecting device 40 and collected. The powder collecting device 40 further has an exhaust pipe 42 connected to a blower 43 at the bottom end of the body 11 of the mill 10.

As shown in FIG. 1 and FIG. 3, the powder grinding device 20 mainly comprises an outer grinding wheel 21 having a substantially disk shape, and a plurality of inner rollers 22 disposed on the inner side surface of the outer grinding wheel 21; and a driving device for driving the outer grinding wheel 21. The rotating drive unit 23 is composed of.

When the grinding device 20 is started, the blower 43 of the powder collecting device 40 is started up, and the airflow is sent into the lower space of the body 11, and then sucked out from the air outlet 12 above the body to form a slave body 11. The bottom of the internal space circulates toward the rising airflow. Circulating from the rising airflow, the grinding powder particles of the grinding device 20 can be taken up through the separating device 30, and then the powder particles in the gas stream can be screened by the separating device 30. Among the powder particles, the powder particles having reached a predetermined diameter can be smoothly passed through the separating device 30 and collected by the foregoing collecting device 40; and the coarser particles having a predetermined diameter have not yet reached the separating device. 30 is separated and re-dropped into the grinding device 20 below to re-grind.

As shown in FIG. 1 , FIG. 4 and FIG. 5 , the separating device 30 of the present invention comprises: a transmission shaft 31 disposed on a central axis of the body 11 , and further disposed on the top surface of the body 11 and connected to the transmission shaft 31 . The driving device 36 is configured to drive the transmission shaft 31 to rotate; and the two ring frames 32 are disposed above and below the transmission shaft 31; and a plurality of separating blades 33 are arranged in an annular arrangement. The second ring frame 32 is rotatably driven by the transmission shaft 31 and the ring frame 32 to vortex the airflow passing through the separating device; and a substantially cylindrical flow guiding member 34 is disposed around each of the two. The outer periphery of the separating blade 33; and a disk-shaped control panel 35 are vertically and vertically disposed at a position below the plurality of separating blades 33 and the flow guiding member 34.

As shown in FIG. 3 and FIG. 6 , the flow guiding member 34 surrounds the outer periphery of the separating blade 33 , and a plurality of hollow portions 341 are disposed on the side surface thereof, and each of the hollow portions 341 is substantially perpendicular to the guiding member 34 . A rectangular hole shape parallel to the axial direction; and a plurality of inclined plates 342 are disposed at the opening of each of the hollow portions 341. As shown in FIG. 6, the plurality of inclined plates 342 are connected to the edge of the hollow portion 341 toward the advancing direction of the swirling airflow produced by the vane 33 (in the direction of the arrow indicated by C in the figure); One side of the airflow direction is inclined outward toward a direction away from the outer surface of the flow guiding member 34, so that the direction of the inclination is substantially coincident with the centrifugal radiation direction of the swirling airflow C, so that the vortex flow is received. The airflow driven by the centrifugal force (shown by the arrow of D as shown in the figure) and the powder particles entrained in the airflow can be discharged from the hollow portion 341 (to be described later).

As shown in FIG. 4 and FIG. 6, the ring frame 32 has a substantially annular shape, and has a sleeve 322 at the center thereof to fit over the transmission shaft 31, and has a plurality of ribs 321 extending toward the center on the inner side thereof. The ends of the ribs 321 are connected to a sleeve 322 having a diameter smaller than the inner diameter of the ring frame 32, and are sleeved and fixed on the transmission shaft 31 by the sleeve 322. Through the inner side of the ring frame 32, a plurality of substantially circular arc-shaped permeable portions 323 are formed in common with the outer side of the sleeve 322 and the outer sides of the respective ribs 321 for airflow.

As shown in Fig. 5, when the mill is in operation, the air flow for causing the powder to rise is passed through the separating device 30 from bottom to top. While the airflow passes through the separating device 30, the plurality of separating blades are driven by the transmission shaft 31 and the ring frame 32 to rotate at a high speed, so when the airflow passes through the separating device 30, the airflow is affected by the blade turbulence, and the high speed is generated. vortex.

The vortex flow generated by the plurality of separation vanes 33 can be generated Centrifugal force, due to the centrifugal force, drives the powder away from the center to the periphery. As we know, the closer to the center of rotation, the more vacuum, so in the vortex flow, the closer to the center of the rotating body, the lighter the powder The weight of the powder is farther away from the center (ie, closer to the periphery). Therefore, when the powder buoyancy is greater than gravity, it can rise upwards, and the upper wind is pumped away (as shown by the path of arrow A shown in Figure 5); while the heavier (coarse) powder follows the vortex The air flow is thrown outward, and is discharged from the hollow portion 341 on the side of the flow guiding member 34 (shown by the path of the arrow B as indicated in the figure), and then re-dropped into the grinding mechanism below to be reground.

The main feature of the powder separating device 30 of the present invention is that the separating blade 33 is fast-swappable and swingably mounted on the ring frame 32; and the ring frame 32 is provided for separation and installation. The number of holes of the holes 324 of the vanes 33 is arranged in an abundance number, so that the separating vanes 33 can be placed on the ring frame 32 in such a manner that the respective factors of the number of the holes 324 are the vane spacing.

Therefore, the user can adjust the number and density of the separation vanes 33 elastically and quickly to control the particle size of the powder while maintaining the weight balance of the separation vanes 33 mounted on the ring frame 32.

As shown in FIG. 4 and FIG. 5, the separation blade 33 of the present invention is fixed to the upper and lower ends of each of the separation blades 33 on the side of the ring frame 32, and is provided with two vertical boring shafts 331, respectively. The shaft 331 is generally cylindrical in shape, and the bottom end protrudes downward from the bottom edge of the portion where it is connected to the separating blade 33. Further, the two upper and lower array ring frames 32 are arranged along the edge of the two ring frame 32 to provide a plurality of holes 324 for the bottom end of the first shaft 331 to be inserted, thereby installing the separating blade 33 on the second ring. Above the shelf 32.

As shown in FIG. 5, the centers of the holes 324 of the two ring frames 32 are aligned with each other, and the two turns 331 of the separating blades 33 are aligned with each other on the same central axis, and the spacing thereof is the same as the two. The distance between the ring frames 32 is approximately equal, so that they can be respectively inserted into the holes 324 of the upper and lower ring frames 32, and the separating blades 33 can be rotatably mounted around the respective shafts 331 to the two. Above the ring frame 32.

As shown in FIG. 5, between the separating blades 33 and the ring frame 32, the weight of the separating blade 33 is simply held in the state of the hole 324 by the weight of the separating blade 33, and is not otherwise fixed by other means. When the separation blade 33 is attached or detached, the yoke shaft 331 is simply inserted or pulled out from the hole 324, so that the purpose of quickly replacing and adjusting the separation blade 33 can be achieved.

In addition, in order to allow the separation vanes 33 to elastically adjust the number and density of the insertions on the ring frame 32, and to maintain the installation pitch of the separation vanes 33, the aforementioned holes 324 are disposed at equal angular intervals on the second ring. The number of holes of the plurality of holes 324 must be an abbreviated integer, so that the separating device 30 can adjust the number and density of the separating blades 33 by the respective factors of the number of the holes 324. The distance between the two separation blades 33 is such that the number and density of the separation blades 33 can be elastically adjusted, and at the same time, the separation blade 33 can be placed in the ring frame 32 to maintain balance.

The calculation method of the number of mounting spacers of the separation blade 33 will be described below by way of example.

For example, as shown in Table (1), the calculation method of the installation pitch of the separation blade 33 is described by taking 42 holes as an example. As shown in the table, by factorization, the factorization of the number of holes 42 is calculated as: 2X3X7, and the factors are, in addition to 42, a total of 1, 2, 3, 6, 7, 14, 21, and the like.

When the user wants to adjust the number of the separation vanes 33 and the installation density, the respective factors can be used as the spacing of the separation vanes 33, as shown in the above table, for example; when 42 separate blades are placed on the ring frame 32 When the factor 1 is used as the pitch of the blade insertion, the number of the spacing holes between the two separating blades becomes 0 at this time: and when the 21 separating blades 33 are inserted, the spacing of the separating blades 33 is 2, and each of the two The number of spaced holes between the sheet separating blades becomes 1; and when 14 separating blades 33 are inserted, the spacing of the separating blades 33 is 3, and the number of spaced holes between each of the two separated blades becomes 2. The remaining number of blades installed and the separation distance can be easily known from the data shown in Table (1) above.

Further, as shown in Table (2), if the number of holes 324 in the ring frame 32 is 72 holes, the factor of the decomposition of 72 is: 2ˆ3 X 3ˆ2, in addition to 1 and 72, in terms of factorization. In addition, there are a total of: 2, 3, 4, 6, 8, 9, 12, 18, 24, 36.

Therefore, when the separation vane 33 is attached, the respective factors shown in the following table can be placed on the ring frame 32 as the inter-blade pitch.

In the embodiment shown in Fig. 6, 72 holes 324 are provided on the ring frame 32 as shown in the above table (2), so that the separating blades 33 can be listed in Table (2) when installed. The individual factors are used as the spacing of each of the two separating blades 33 on the ring frame 32.

Therefore, when the user wants to adjust the number and separation of the separation blades 33 In the case of a degree, the number of factors of the number of holes 324 described above can be used as a basis for adjusting the spacing of the inter-separated holes of each of the two separating blades 33.

In the above embodiment, it is possible to quickly determine how many different types of interposed separating blades 33 are combined and how to insert them in various mounting modes by means of table lookup. For example, when 36 separation blades 33 are arranged on the ring frame 32, the separation blades 33 are inserted in such a manner that one separation blade 33 is inserted every two holes, and at this time, a gap of 1 hole is left between each two separation blades 33 (for example). Figure 7); when inserting 24 separation blades, the spacing between each two separation blades 33 is 3 holes, and there is a gap of 2 holes between each 2 blades (as shown in Figure 8). When inserting 18 separate blades, the spacing between each two separating blades 33 is 4 holes, and there is a gap of 3 holes between each 2 blades (as shown in Figure 8); When 12 blades are separated, the spacing between each of the two separation blades 33 is 6 holes, and a gap of 5 holes is left between every two blades (as shown in Fig. 9).

The number of blades and the number of spacer holes in the remaining installation methods are analogous to this method, and are not described in detail in this specification.

When the number of the separation vanes 33 provided on the ring frame 32 is larger (i.e., the density of the separation vanes 33 is higher), the higher the strength of the airflow vortex generated by the separation vane 33 during the rotation, the greater the centrifugal force of the swirling airflow, Therefore, more air in the ascending air current passing through the center of the separation vane 33 is driven outward, and the gas flow energy passing through the center of the ring frame 32 is reduced, so that the separated powder particles are finer.

On the other hand, if less separation blades 33 are mounted on the ring frame 32, the strength of the vortex flow generated is lower, so that more airflow passes through the center of the ring frame 32, and coarser powder can be used. The particles are driven to rise, so the separated powder particles are coarser.

Therefore, the technique of the present invention can achieve the purpose of controlling the thickness of the separated powder simply by adjusting the number of the separation vanes 33 mounted on the ring frame 32. At the same time, by setting the number of the holes 324 in the ring frame 32, the user can easily calculate the number of the spacing holes of the separating blades 33 when the separating blade 33 is installed, and the user can quickly adjust and set the separating blades 33. The installation position, and avoiding the uneven installation position of the separation blade 33, causes the separation device to lose balance during operation, causing vibration to affect the precision of the operation of the grinding device, and even cause damage to the device.

The above technical means of the present invention provide a control structure capable of elastically adjusting and controlling the powder separation device used by the mill to control the thickness of the powder particles, and has the advantages of simple and rapid operation, and thus has met the novelty of the invention patent. And progressive elements. However, the above description is only for the purpose of illustrating the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, that is, other equivalents without departing from the spirit of the invention. Variations are intended to be included in the scope of the patent application of the present invention.

10. . . grinder

11. . . Ontology

12. . . Air outlet

20. . . Grinding device

twenty one. . . External grinding wheel

twenty two. . . Inner roller

twenty three. . . Drive unit

30. . . Separation device

31. . . transmission shaft

32. . . Ring frame

321. . . Rib

322. . . Bushing

323. . . Ventilation

324. . . hole

33. . . Separating blade

331. . .拴 axis

34. . . Flow guiding member

341. . . Hollowing

342. . . Inclined plate

35. . . control panel

36. . . Drive unit

40. . . Powder collecting device

41. . . Air duct

42. . . exhaust pipe

43. . . Blower

Fig. 1 is a perspective view showing the combination of a mill equipped with the powder separating apparatus of the present invention.

Figure 2 is a plan view showing the overall appearance of a mill equipped with the powder separating apparatus of the present invention.

Fig. 3 is a partial perspective assembled view of the grinding device and the separating device of the mill shown in Fig. 1.

Figure 4 is a perspective exploded view of the powder separating apparatus of the present invention.

Fig. 5 is a sectional view showing the combination of the powder separating apparatus of the present invention.

Fig. 6 is a plan view showing the powder separating apparatus of the present invention in a state in which the separating means is inserted.

Fig. 7 is a plan view showing the powder separating apparatus of the present invention in a state in which 36 separation blades are inserted.

Fig. 8 is a plan view showing the powder separating apparatus of the present invention in a state in which 24 separate blades are interposed.

Fig. 9 is a plan view showing the powder separating apparatus of the present invention in a state in which 18 separate blades are interposed.

30. . . Separation device

31. . . transmission shaft

32. . . Ring frame

321. . . Rib

322. . . Bushing

323. . . Ventilation

324. . . hole

33. . . Separating blade

331. . .拴 axis

Claims (5)

A powder separating device is used for matching with a grinding device for screening the diameter of the powder particles ground by the grinding device, including: a transmission shaft; and two ring frames corresponding to each other The utility model has an annular shape, a sleeve is fixedly connected to the center thereof, and is disposed on the transmission shaft by the shaft assembly; and the inner side of the two ring frame is extended inwardly with a plurality of ribs, and the plurality of ribs are The rib is connected to the sleeve, and the inner side of the ring is located between the ribs to form a plurality of vacant portions; the two ring frames are provided with a plurality of holes near the edge position; and a plurality of separating blades , is disposed around the ring frame, and is disposed on one side of the ring frame with two yoke axes aligned with each other and perpendicular to the two ring frames, and the two yoke shafts can be inserted into Among the plurality of holes, the plurality of separating blades are swingably mounted on the ring frame; the number of holes provided in the ring frame is an integer number, so that the separating blade can be installed The various factors of the total number of holes The basis of the number of spaced holes for separating the blades; the powder particles ground by the grinding device are driven by the airflow through the separating blades of the separating device, and the vortex flow generated by the rotation of the separating blades is used in the powder particles The larger diameter particles are extracted by centrifugal force to achieve the purpose of screening the powder particles. The powder separating device of claim 1, wherein a bottom end of the plurality of separating blades protrudes from a bottom edge of each of the separating blades, and is insertable into the plurality of holes of the two ring frame, A state in which the plurality of boring shafts are retained in the plurality of holes by the weight of the plurality of separating blades. The powder separating device of claim 1, further comprising: a substantially cylindrical flow guiding member disposed around the outer side of the plurality of separating blades; the flow guiding member is provided with a plurality of The hollow portion is connected to an inclined plate on one side of each of the hollow portions. The powder separating device of claim 3, wherein the powder grinding device is disposed below the separating device, and the powder particles that have been ground by the grinding device can be raised by an ascending air current. Pass the separation device. The powder separating device of claim 4, further comprising: a disk-shaped control disk, which is vertically adjustable in height, wherein the transmission shaft is located in the plurality of separating blades and the flow guiding member The lower position is used to control the flow of airflow entering from below the separation device.