KR20040078505A - Pulverizer - Google Patents

Abstract

PURPOSE: A pulverizing apparatus is provided to achieve a desired particle size of pulverized material through only one input operation into a hopper without requiring additional equipment or process. CONSTITUTION: The pulverizing apparatus comprises a housing(10) formed with an input opening(15) into which a material to be pulverized is poured, a cover plate(14) formed with a discharge opening(13) being fixed at one side end of the housing, a rotating shaft(20) installed at the center of the housing and connected to a motor, a rotor(40) fixed to the rotating shaft and located inside the housing, a plurality of blades being formed at a disk(42) thereof, and a classifying space defined between the cover plate and the rotor and having a diameter larger than those of the discharge opening and the rotor.

Description

Crusher {PULVERIZER}

The present invention relates to a pulverizer, and more particularly, to a pulverizer that allows the grinding object to be in an ultrafine state.

In general, a pulverizer is a device that grinds the pulverized material introduced into a predetermined particle state by using a rotor rotating at a high speed, and receives lumps of various types of pulverized material from a hopper and pulverizes it through a pulverizer to make a particulate material. In addition, the pulverized particulate matter is classified by particle size through a classifier.

The pulverizer disclosed in the registered utility model No. 130770 proposes an improved pulverizer for the purpose of compensating for the disadvantage that the grinding efficiency of the pulverized material is extremely low because it cannot be rotated at high speed, and the pulverizer has a casing internal combustion on the pulverization portion of the pulverizer. Forming a grinding liner having an uneven surface on the grinding wheel, and rotating the fixed disk up and down on a rotating shaft connected to a grinding motor for high-speed driving to install a plurality of grinding cutters radially on the outer edge thereof. On the upper surface of the disc, a plurality of round bar crushed stone pieces and a cutting surface of trapezoidal crushed stone pieces are formed. The classifying rotor of the crusher is a structure in which a plurality of vanes are conically formed on a rotating shaft driven at high speed by a classifying motor to have a predetermined inclination angle. .

In addition, the conventional pulverizer among the pulverizers is configured to pulverize the pulverized object by using a rotor rotating at a high speed, and to recycle the material pulverized until the pulverized object is pulverized to a predetermined particle size.

However, the above-mentioned prior art registered utility model repeats the regrinding to obtain a pulverized product having a desired particle size as a whole when classification is performed in a state where the proposed pulverization is not satisfactory. This will be accompanied by inconvenience.

Therefore, during the regrinding process, the classified powder must be re-injected into the hopper again, resulting in an increase in working time and a decrease in work efficiency.

In addition, there is a problem in that a pulverized product having a desired particle size cannot be obtained by only adding the pulverized matter to the hopper once.

In the case of the conventional pulverizer described below, when pulverizing coarse particles larger than 50 μm, a large amount of heat may be generated to change the physical properties of the pulverized object. Therefore, only particles having a particle size of 30 to 50 μm may be added. There is a possible limitation.

In addition, the conventional grinding machine is placed in front of the grinding machine in order to classify in the case of producing a high-fiber, fat-containing food or herbal medicine in ultra-fine powder, and classified through the mesh of the mesh, but Food or herbal medicines contain moisture, so the finely ground foods or herbal medicines are entangled in the net, and thus, fine grinding is not easy.

In addition, the conventional pulverizer does not have a separate configuration for lowering the heat of crushing generated during the pulverization, and thus it cannot be used to finely chemical chemicals because it is affected by biological changes such as nutrient destruction of foods due to the crushing heat. This will be.

The present invention has been proposed to solve the problems of the prior art, and an object of the present invention is to provide a grinder configured to obtain a grind having a desired particle size even by putting a ground material into the hopper only once.

In addition, another object of the present invention to provide a grinder that can increase the work efficiency during the grinding of the workpiece.

In addition, another object of the present invention is to provide a pulverizer capable of finely pulverizing more freely from the particle size of the material than the conventional pulverizer.

Another object of the present invention is to provide a grinder that can be easily pulverized a food or herbal medicine containing a lot of fiber and fat.

It is another object of the present invention to provide a grinder that hardly generates heat of grinding during grinding.

1 is a perspective view showing a grinder according to the present invention,

2 is an exploded perspective view showing a grinder according to the present invention,

3 is a perspective view mainly showing the input space of the input guide inserted into the grinder,

4 is a cross-sectional view showing a grinder according to the present invention,

5 is a graph showing the results of Experimental Example 1 using a grinder according to the present invention,

6 is a graph showing the results of Experimental Example 2 using a grinder according to the present invention.

Explanation of symbols on the main parts of the drawings

10 housing 11 motor

12: drive shaft 13: discharge hole

14: cover plate 15: material inlet

16: recirculation port 17: air inlet

18: air inlet 20: rotation axis

21: fixed tube 22: bearing

30: Input guide 32: Input space

40: rotor 41: through hole

42: disc 43: blade

50: collision part 51: 1st track

52: secondary track 53: parallel collision groove

54: slope crash groove

According to an aspect of the present invention, there is provided a pulverizer comprising: a housing in which a material inlet through which a pulverized object can be put and a cover plate having a discharge hole are fixed at one end thereof; A rotating shaft disposed in the center of the housing and connected to the motor; A rotor positioned inside the housing with the disc fixed to the rotating shaft and having a plurality of blades formed on the disc; And a classification space located between the cover plate and the rotor and formed to have a diameter larger than the diameter of the rotor and the diameter of the discharge hole.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a pulverizer according to the present invention, Figure 2 is an exploded perspective view showing a pulverizer according to the present invention, Figure 3 is a perspective view mainly showing the input space of the input guide inserted into the pulverizer, Figure 4 Is a cross-sectional view showing a grinder according to the present invention.

As can be seen from the drawings, the grinder of the present invention is disposed in the housing 10, the rotating shaft 20 is disposed in the center of the housing 10 and connected to the motor 11, and the inside of the housing 10 The input guide 30, the rotor 40 is installed adjacent to the input guide 30 and rotated by the rotary shaft 20, and the impact portion 50 is located outside the edge of the rotor 40.

Here, the housing 10 has a left end open and a part of the right end blocked when the reference is made to FIG. 4, and the right end of the housing 10 has an insertion hole into which the rotation shaft 20 is inserted in the center thereof. The cover plate 14 is bolted to the left end of the 10.

The cover plate 14 is formed with a discharge hole 13 through which the pulverized fine powder is discharged. The diameter of the discharge hole 13 is preferably smaller than the inner diameter of the housing 10 described above.

Meanwhile, as shown in FIG. 1, a plurality of inlets are formed on the outer surface of the housing 10, more preferably, a material inlet 15 for injecting the material to be milled, and pulverized particles having a large particle size. A recirculation port 16 for recirculating at the interface of the collision part 50 by centrifugal force, an air inlet 17 for introducing air as much as the volume of the material to be shredded into the housing 10, and a collision part ( In one of 50), the air inlet 18 is formed to smooth the circulation of the recirculation opening 16 through the resolution of the lumping, which is the characteristic of the fine particles and the improvement of the centrifugal force at the interface.

The material inlet 15 is formed in a direction perpendicular to the housing 10 and is positioned to the right of the housing 10 with reference to FIG. 4.

In addition, the air inlet 17 and the recirculation port 16 are formed at a position away from the material inlet 15 described above, and are preferably formed at a position approximately 45 ° with respect to the material inlet 15.

The air inlet 17 is formed on the right side of the housing 10 with reference to FIG. 4, like the material inlet 15, and the recirculation opening 16 is located on the left side of the housing 10 with reference to FIG. 4. Is formed. In particular, since the recirculation port 16 and the air inlet 17 are in communication with each other, particles having a large particle size are introduced into the housing 10 again through the recirculation hole 16, and the particles having a large particle size are regrinded. It is done.

And the air inlet 17 is provided with a ball valve 19 to adjust the amount of air flowing through the air inlet (17). Since the amount of air introduced varies according to the opening and closing amount of the ball valve 19, the opening and closing degree is adjusted in proportion to the amount of the to-be-ground object, thus effectively reducing the heat generated when the to-be-ground object is pulverized.

On the other hand, the air inlet 18 is connected to the blowing fan (not shown) for forcing air into the housing 10. The air inlet 18 is formed to compensate for the insufficient amount of air introduced into the material inlet 15 by the amount of the crushed material, and the installation angle is determined by the amount of grain within a range of 180 ° with respect to the material inlet 15. It is preferred that the angle can be adjusted accordingly.

The rotary shaft 20 inserted into the housing 10 configured as described above is supported by a bearing 22 installed inside the fixed tube 21 while being inserted into the fixed tube 21 fixed to the outside of the housing 10. The driven pulley 23 is fixed to the right end of the rotating shaft 20 and is connected to the drive pulley 12a and the belt 12b fixed to the drive shaft 12 of the motor 11.

As shown in FIGS. 2 and 3, the injection guide 30 in close contact with the inner right side of the housing 10 has a first through hole 31 through which the rotating shaft 20 penetrates at a central portion thereof. An input space 32 corresponding to the material inlet 15 and the air inlet 17 is formed around the first through hole 31, and the partition 33 is preferably formed at a side adjacent to the rotor to be described later.

Here, the diameter of the first through hole 31 is greater than the outer diameter of the rotating shaft 20 and smaller than the inner diameter of the housing so that the space formed between the rotating shaft 20 and the first through hole 31 is a suction passage of the pulverized object. It will work.

The input space 32 is formed in the shape of a fan-shaped groove when the input guide 30 is viewed from the front, and the angle α from one side to the other side of the input space 32 is formed within a 180 ° range. It is preferable. According to the range of this angle, the degree of vacuum formed around the rotating shaft 20 during the rotation of the rotating shaft 20 is different. That is, the greater the angular range, the lower the degree of vacuum.

The partition wall 33 functions to separate the space between the rotor and the input space 32 which will be described later, and allows centrifugal force to be generated in the input space 32 during rotation of the rotating shaft 20.

The rotor 40 disposed close to the feeding guide 30 has a structure in which a plurality of blades 43 are fixed along the edge of the disc 42 having the second through hole 41 formed at the center thereof. 43 is fixed vertically toward the center of the disc 42. The rotation speed of the rotor 40 can be rotated in the range of 9000rpm to 15000rpm.

The disc 42 is bolted together with the coupling plate 46, the edge of which is adjacent to the second through hole 41, which is padded on the left end of the rotation shaft 20, to rotate together with the rotation of the rotation shaft 20.

As shown in FIG. 2, the blade 43 includes a parallel portion 44 having an outer end parallel to the axial direction, and an inclined portion 45 formed to be inclined, and the parallel portion 44 includes a disc 42. It is located on the right side with respect to the inclined portion 45 is located on the left side.

When the rotor 40 rotates at a high speed, the pulverized material introduced through the input guide 30 and the air introduced through the air inlet 17 are forcedly sucked into the center of the rotating shaft 20, and the sucked crushed material is sucked. Water and air collide with both sides of the parallel portion 44 of the blade 43 by centrifugal force.

The impingemented object and air pass through the impingement part 50 which will be described later, and the object to be milled is pulverized.

The collision part 50 may be manufactured in a quadrangular or trapezoidal shape with respect to its inner space, and may be composed of one or a plurality of tracks, preferably the primary track 51 and the secondary track 52. It is composed of

Here, the primary track 51 is formed in a ring shape and is inserted into the housing 10. The primary track 51 is in close contact with the left side of the feeding guide 30, and is in close contact with the outer end of the parallel portion 44 of the blade 43.

The primary track 51 is formed with a plurality of parallel collision grooves 53 in the rotational axis direction on the inner circumferential surface. The parallel collision groove 53 is a groove formed in a semi-cylindrical shape in which the cylinder is cut in the axial direction. A plurality of parallel collision grooves 53 are formed in succession, and two adjacent parallel collision grooves 53 meet and are sharp. Will form four corners.

When the rotor 40 is rotated, the pulverized material ejected by the centrifugal force collides at various angles to the corner and the parallel collision groove 53 to be broken while being crushed.

The secondary track 52 is a track formed in contact with the primary track 51 in a ring shape, and has an inner circumferential surface corresponding to the inclination angle of the blade inclined portion 45. In more detail, the inner diameter of the side closer to the parallel portion 44 is larger than the inner diameter of the far side corresponding thereto.

A plurality of inclined collision grooves 54 are formed on the inner circumferential surface of the secondary track 52, and the inclined collision grooves 54 are formed in a semiconical shape unlike a shape formed in the parallel collision groove 53. Four inclined collision grooves 54 are connected to each other to form a plurality of corners.

In addition, the inclined collision groove 54 is disposed in the same position as the parallel collision groove 53 so that the pulverized pulverized object moved while colliding in the parallel collision groove 53 collides again to be further finely divided.

The collision part 50 comprised in this way may be provided in multiple numbers of the same form as the primary track 51, and may be used by connecting the primary track 51 and the secondary track 52 in connection.

In the state where the secondary track 52 is completely inserted into the housing 10, as shown in FIG. 4, a gap is provided between the left end of the housing 10 and the left end of the secondary track 52. It is arranged to form a classification space (55).

The diameter of the classification space 55 corresponds to the internal diameter of the housing 10, but more preferably, the diameter of the classification space 55 is larger than the internal diameter of the primary track 51 or the secondary track 52. Only need be formed.

The classification space 55 allows the air introduced through the air inlet 18 to escape through the recirculation port 16 to facilitate the circulation of the pulverized material.

The grinder according to the present invention configured as described above has the following effects.

First, the grinding principle related to the present invention will be described before explaining the operation of the grinder according to the present invention. The boundary between the centrifugal force and the drag is formed on the rotational track according to the rotational speed of the rotor, and the pulverized material affected by the drag is covered. It is discharged through the discharge hole of the plate, and the volume of the pulverized product which is affected by the centrifugal force is recycled to the input guide through the recirculation port by the air introduced through the air inlet.

In addition, there may be various factors affecting the discharge of the pulverized product, but it will vary depending on the rotational speed of the rotor and the degree of vacuum of the dust collector (not described) connected to the discharge hole of the cover plate. It is assumed that the rotation speed of the rotor is also the same.

The embodiment of the present invention to which this principle is applied first rotates the drive shaft 12 by operating the motor 11 of the grinder. As the drive shaft 12 rotates, the rotating shaft 20 connected to the belt 12b also rotates together. At the same time, the blowing fan is also rotated together to force air into the air inlet 18, and the pulverized material is also introduced through the material inlet 15.

The injected pulverized matter is introduced into the input space 32 of the input guide 30 and is introduced into the right side surface of the rotor 40 from the input space 32 by the suction force of the rotor 40 which rotates at high speed.

At this time, since the input space 32 is formed in a fan shape, it immediately flows into the rotor 40 without being accumulated in the lower portion of the input space 32.

Inflowed to-be-pulverized object extends outward with respect to the rotating shaft 20 by the centrifugal force formed in the right side of the rotor 40, and the to-be-ground grind | pulverized object collides with the both sides of the parallel part of the blade 43, and it will primary grinding | pulverization After that, it is bounced outward.

The bounced primary crushed matter is secondarily crushed into smaller particles while colliding with the corners of the parallel collision groove 53 of the primary track 51.

The secondary pulverized secondary pulverized material moves in accordance with the flow of air formed around the disc 42 of the rotor 40 to partially collide with the inclined portion 45 of the blade 43, and part of the secondary track 52. Collided with the inclined collision groove 54 of the) and is pulverized into three smaller particles.

Among the tertiary pulverized tertiary pulverized, those belonging to the predetermined particle size range are the flow of air formed according to the rotation of the rotor 40, that is, the inner diameter is reduced while passing through the secondary tracks 52, and the air is further accelerated. The flow guides the pulverized material within a predetermined particle size range to pass through the second through hole 41 of the disc 42.

However, the pulverized material having a relatively large particle size that has not been crushed has a large centrifugal force to escape to the outside by the air flowing into the air inlet 18 and the classification space 32 suddenly widened out of the secondary track 52. By acting, it passes through the recirculation port 16 and moves toward the air inlet 17.

That is, the classification space 32 proposed according to the characteristics of the present invention has a diameter larger than the discharge diameter of the discharge hole 13 and the secondary track 52 so that the inner peripheral surface passes through the inclined secondary track 52. While the centrifugal force is limited while the accelerated pulverized material exits the secondary track 52, it is directed toward the recycle port.

Grinded matter having a relatively large particle size moved to the air inlet 17 is sucked together with the air introduced through the air inlet 17 by the suction force caused by the rotation of the rotor 40, and thus the input space of the input guide 30 is reduced. Flows into (32). At this time, the amount of air introduced through the air inlet 17 is introduced by the volume of the pulverized material introduced through the input space (32).

The recycled pulverized material thus introduced is pulverized while being recycled continuously until it is in the predetermined particle size range through the above-described process, and the pulverized object falling in the predetermined particle size range is discharged from the cover plate 14 (13). Is discharged to outside.

Experimental examples of finely pulverizing red Cordyceps sinensis using the grinder of the present invention are shown below. 5 is a graph showing a particle size distribution when recirculation does not occur because no air is input into the air inlet, and FIG. 6 is a graph showing a particle size distribution when air is input into the air inlet. In these graphs, d refers to the diameter of the particle, and the values in parentheses are based on the vertical line passing through the peak of the particle distribution curve, where 0.1 is up to 10% across the left and right, 0.5 is up to 50%, and 0.9 Means volume up to 90%.

Experimental Example 1

In Experimental Example 1, without introducing air through the air inlet 18, the rotation speed of the rotor 40 was 9000 rpm, the amount of pulverized material introduced into the hopper was 2 kg, and the ball valve 19 was completely opened.

When the grinding is started in this state, since no air is introduced into the air inlet 18, the pulverized material is discharged through the discharge hole 13 of the cover plate 14 with only one grinding being performed without a recycling process.

Referring to the graph on the basis of the particle size of the discharged fine pulverization as shown in FIG. From this graph, it can be seen that the particle distribution is widely represented. On the basis of the particle distribution, the diameter of the particle does not exceed 6.841 μm at d (0.1), and the diameter of the particle at d (0.5). It does not exceed 36.03 μm and d (0.9) does not exceed 190.068 μm.

Experimental Example 2

In Experimental Example 2, air was introduced through the air inlet 18, the rotation speed of the rotor 40 was 9000 rpm, the amount of pulverized material introduced into the hopper was 2 kg, and the ball valve 19 was completely opened.

When pulverization is started in this state, air is introduced into the air inlet 18, so that the pulverized material is pulverized while a recycling process occurs, and the pulverized pulverized product opens the discharge hole 13 of the cover plate 14. Is discharged through.

Looking at the particle size distribution as shown in Figure 6 on the basis of the discharged fine pulverized as follows. It can be seen from the graph that the particle size distribution of the pulverized product is 3.414 μm in d (0.1), 10.137 μm in d (0.5), and 29.791 μm in d (0.9).

What can be seen through the above two experiments is that as the result of recirculating the pulverized material by introducing air through the air inlet 18, it is possible to finely finer particle size.

In addition, herbal medicines containing a lot of moisture, fiber and the like compared to the volume can be easily finely divided.

As described above, according to the present invention, the pulverized material introduced through the hopper is first pulverized by the rotor, and pulverized again in the first and second tracks, but the pulverized material is not pulverized through the air inlet. The supplied air is regrind through the recirculation port and pulverized until it is within the particle size range.

Therefore, the pulverized material having the desired particle size can be obtained even by putting the pulverized material into the hopper only once, so that no separate equipment or labor is required.

In addition, since no additional work is required when grinding the pulverized material, it is possible to obtain a pulverized product having a desired particle size range in a short time.

In addition, the pulverizer of the present invention can lower the heat generated during the pulverization to the air flowing through the air inlet, so that the fine pulverization is more free from the particle size of the material than the conventional pulverizer.

In addition, the pulverizer of the present invention repeatedly pulverizes through recirculation, so that it is not necessary to install a net for classification, so that foods or herbs containing a lot of fiber and fat can be pulverized easily.

Claims (14)

A housing into which a material input opening into which the pulverized material can be put and a cover plate having a discharge hole formed are fixed to one end; A rotating shaft disposed in the center of the housing and connected to the motor; A rotor positioned inside the housing with the disc fixed to the rotating shaft and having a plurality of blades formed on the disc; And A classification space located between the cover plate and the rotor, the classification space formed of a diameter larger than the diameter of the rotor and the diameter of the discharge hole Grinder comprising a. The pulverizer according to claim 1, further comprising a recirculation port in the housing for communicating with the classification space and the side into which the pulverized material is introduced. The grinder according to claim 1 or 2, further comprising an air inlet for communicating with the classification space to inject air into the housing. The pulverizer according to claim 1, wherein a diameter of the discharge hole is smaller than a path diameter of the pulverized object passing through the rotor. The grinder of claim 2, further comprising an input guide provided in the housing and connected to the material inlet, and an input guide having a partition wall separating the rotor and the input space. The grinder according to claim 5, wherein the feeding guide is formed such that a first through-hole larger than the diameter of the rotating shaft and smaller than the diameter of the housing communicates with the feeding space at the center thereof. 6. The grinder according to claim 5, wherein an air inlet communicating with the input space is formed in the housing. The grinder of claim 7, wherein the air inlet and the recirculation port communicate with each other. The grinder of claim 1, wherein the plurality of blades are vertically fixed at an edge of the disc toward the center of the disc. 10. The grinder according to claim 9, wherein the plurality of blades have a parallel portion whose outer end is parallel to the axial direction and is located on the right side with respect to the disc, and an inclined portion whose outer end is inclined and is located on the left side with respect to the disc. 11. The grinder of claim 10, further comprising a colliding portion which is located outside the edge of the rotor and has a cross-sectional shape with respect to its inner space in a quadrangular or trapezoidal shape so that the workpieces collide. 12. The method of claim 11, wherein the impact portion is formed in a ring shape on the outer side of the parallel portion and a plurality of parallel collision grooves on the inner circumferential surface, and in contact with the primary track located on the outer side of the inclined portion in a ring shape A mill comprising a secondary track formed with a plurality of inclined crash grooves on the inner circumferential surface. The crusher according to claim 12, wherein a plurality of collision grooves formed in the primary track are formed in parallel to the parallel portions of the blades, and the plurality of crash grooves are continuously formed in a semi-cylindrical shape in which the cylinder is cut in the axial direction. The crusher of claim 12, wherein the impact groove formed in the secondary track has an inner circumferential surface corresponding to the inclination angle of the blade inclined portion, and is formed in a semiconical shape on the inner circumferential surface.