KR101656701B1 - Pulverizing mill and Grit Funnel Extension Pipe for reduction of purverizing mill vibrations - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulverizer for pulverizing coal, a fuel inlet extension pipe for reducing the motion vibration of the pulverizer, and upper and lower coal distributors. More particularly, And an extension pipe capable of reducing vibration due to the nature of the differential device in which the vibration due to the rotary motion of the rotary plate and the rotary plate is present.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a pulverizer for pulverizing coal, a fuel inlet extension pipe for reducing vibration of motion of the pulverizer, And more particularly to a pulverizer for use in a power plant or the like, which is capable of reducing vibrations due to the nature of a pulverizer due to the fall of coal through a fuel inlet and vibration due to a rotary motion of a rotary plate and a rotary roller, And the like.
The fuel injection port extension pipe and the differential device for reducing the vibration of the differentiator of the present invention as described above are provided with an extension pipe and a fuel inlet for designing the perforated plate on the surface in consideration of excessive vibration and noise of the conventional differential device, And the angle can be controlled to reduce the vibration and noise. In addition, the lower distributor and the lower fan of the conical shape or the fan shape are provided to prevent backflow from the secondary pipe of the secondary air existing in the differentiator and the fuel input part, It is possible to uniformly and stably form a coarse bed and to control the excessive vibration and noise of the conventional differential apparatus more aggressively.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pulverizing mill and a Grit Funnel Extension Pipe for reducing vibration of a pulverizer,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulverization apparatus for pulverizing coal, a fuel input unit capable of reducing the motion vibration of the pulverizer, an extension pipe and upper and lower coal distribution units, and more particularly, An impact due to dropping of coal through the fuel inlet, and an extension pipe including a rotary plate and an extension pipe capable of reducing vibration due to the characteristics of the differential device in which vibration due to the rotary motion of the rotary roller is present.

The pulverizing apparatus of the present invention can be applied mainly in the case of crushing a lump of coal into a fine powder and can be applied in a field where thermal power plants and fine coal particles are used. More specifically, the present invention can be applied to a region where the fuel injecting portion, the rotating plate, the rotating roller, and the extension pipe are formed.

Generally, a differentiator is a machine structure that crushes a small lump of coal, ore, porcelain, wood, grain etc. to a diameter of about 0.07 mm to make fine powder.

More specifically, there is a machine that crushes coal finely, using coal, power, spring, centrifugal force or the like, and an impact type.

In addition, in the case of the coal differentiator, it is recently attracting attention because it is located in a place where fine powder particles of coal, rather than a thermal power plant and other coal lumps, are needed and can quickly and simply provide fine coal particles.

The coal differentiator is a fuel injector located above the central portion of the body of the coal differentiator. The coal dispenser naturally transfers the coal mass to the rotating rollers by the inertia principle through rotational motion and is positioned over the entire bottom of the pulverizer body, A rotating plate provided with a rotating shaft, a rotating roller for crushing coal to engage with the rotating plate, and an extension pipe installed at the lower side of the fuel input portion for inputting coal, together with components for feeding coal of the coal, .

FIG. 1 is a schematic view showing a fuel injecting portion, a rotating plate, a rotating roller, and the like in the construction of the coal differentiator. [0002] Generally, a pulverizing apparatus for coal includes a fuel injecting unit that is open to supply coal at the upper portion thereof, a rotating plate that receives coal agglomerated in the fuel injecting unit and transfers the coal agglomerates to outside through rotational motion, And a stationary rotating roller serving to crush the coal lumps supplied from the rotating motion of the stationary rotating roller.

Recently, in the case of a coal-fired thermal power plant, a pulverizer has been widely used in the process of finely pulverizing coal, and interest in techniques for maximizing the stable operation and differential capacity of the pulverizer has risen have.

Basically, the coal differential device is composed of a solid metal, so there is no major problem with the basic durability. However, in terms of operation of the differential device, the impact energy due to the continuous falling of the coal, the rotation of the rotating plate, There is a problem in that the generation of vibration can not be practically avoided and the fuel (coal or the like) falling down from the upper portion through the fuel injecting portion is not uniformly formed in the coarse bed, There is a problem that noise is generated through the noise.

Therefore, it is inevitable that the potential energy of the coal and the shock, vibration and noise generated by the rotational motion of the rotating plate and the rotating roller can be inevitably reduced.

US 4529136 A

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a pulverizer for pulverizing coal, a fuel injecting part capable of reducing motion vibration of the pulverizer, And more particularly to a coal differential apparatus for use in a power plant or the like, in which the impact due to the fall of coal through the fuel input unit and the characteristics of a differential apparatus in which vibrations due to the rotary motion of the rotary plates And an extension pipe capable of reducing vibrations.

According to an aspect of the present invention, there is provided a pulverizer for pulverizing coal and having a cylindrical body according to an embodiment of the present invention. The pulverizer includes a hopper-shaped fuel inlet located above the center of the body, And at least one or more rotating rollers disposed at a lower center of the body for rotating the coal and engaging with the rotating plate, wherein the fuel injecting unit includes an extension pipe installed at a lower center of the fuel injecting unit Thereby providing a differential device.

At this time, the rotary plate has an inner surface extending from the center by a certain distance and an outer surface extending from the certain distance to the edge, and the rotating roller can be engaged with the outer surface and rotated.

In this case, the rotary rollers may be arranged at regular intervals in the circumferential direction on the outer surface of the outer surface of the rotary plate.

The side surface of the fuel injecting portion of the above-mentioned differential apparatus may be a perforated plate.

Further, the extension pipe may have a side surface formed of a perforated plate, and the extension pipe may be tapered.

According to another embodiment of the present invention, the inner surface of the rotating plate may include a projection protruding upward with respect to the rotation axis.

At this time, the rotating plate may be provided on the upper portion of the protrusion, and may include a conical lower distributing unit disposed on an upper extension of the rotating shaft.

In addition, the cone height midpoint of the cone-shaped lower distributing portion may be located at the same height as the lower end of the extension pipe.

Furthermore, the cone-shaped dispensing portion may have features that include a helical guide.

In addition, the turntable may be provided on the upper portion of the protrusion, and may include a lower fan positioned on an upper extension of the rotation shaft and forming a downward air flow.

The length of the extension pipe may be two times or more and three times or less the distance between the lower end of the extension pipe and the upper portion of the protrusion of the rotation plate.

In addition, the extension tube may include an upper distributor having a plurality of funnel shapes arranged in a circumferential direction on a plane of the lower end.

Finally, in the differential apparatus, the extension pipe may include an upper fan that annularly surrounds the side of the extension pipe and forms an air flow in a downward direction.

The fuel injector, the extension pipe and the differential device for reducing the vibration of the microprocessor according to the present invention as described above are provided with an extension pipe and a fuel injecting part designed on the surface of the perforated plate for excessive vibrations and noise of the conventional differential device, It is possible to reduce the vibration and noise by controlling the length and angle of the secondary air and to reduce the backflow phenomenon of the secondary air of the secondary air existing in the inside of the differentiator and the fuel input part by providing the lower distributor and the lower fan in a conical shape or a fan shape And it is possible to control the excessive vibration and noise of the conventional differential device more aggressively by helping to form the coil bed uniformly and stably.

1 is a schematic view showing a state of a conventional differentiator.
2 is a schematic view showing a state of the differentiator of the present invention.
3 is a plan view showing a rotating plate and a rotating roller.
Fig. 4 is a schematic view showing an extension pipe and a fuel injecting portion including a perforated plate on the side surface. Fig.
Fig. 5 is a front vertical sectional view showing a height limitation of an upper distribution portion inserted into the extension pipe and the extension pipe, and a height limitation of the lower end of the extension pipe and the upper portion distribution.
6 is a front view showing a helical guide of the upper distributor;
FIG. 7 is a front view showing a lower pan located at the lower portion of the extension pipe and the extension pipe, an extension of the rotation axis of the rotation plate, and a safety cover of the lower fan.
8 is a plan view showing a lower pan including a safety cover fixing bar of the lower fan.
Fig. 9 is a front view showing the extension of the projecting portion of the extension pipe and the rotary plate.
10 is a front view showing that the shape of the extension pipe is the shape of the taper.
11 is a front view showing a plurality of lower distributing units installed at the lower end of the extension pipe.
12 is a plan view of the lower distribution portion.
13 is a front view showing an upper fan and a safety cover formed outside the extension pipe;
14 is a plan view of an upper fan and a safety cover formed on the outside of the extension pipe;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Prior to the description, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and should be construed in accordance with the technical concept of the present invention.

Throughout this specification, when a member is " on " another member, this includes not only when the member is in contact with another member, but also when there is another member between the two members.

Throughout this specification, when an element is referred to as "including" an element, it is understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

In each step, the identification code is used for convenience of explanation, and the identification code does not describe the order of the steps, and each step may be performed differently from the stated order unless clearly specified in the context. have. That is, each of the steps may be performed in the same order as described, or may be performed substantially concurrently or in the reverse order.

The present invention relates to an apparatus and method for reducing the vibration and noise of a coal differentiator which can be used in a thermal power plant or the like by providing an extension pipe 3, a lower distributor 30, a lower fan 20, an upper distributor 10, And an upper fan (40).

The present invention has been conceived in the course of identifying and restraining the causes of excessive vibration and noise that may occur in the coal differentiator and the like which have recently been a problem, and further suggesting a solution to the problem.

Hereinafter, this process will be described in detail.

The pulverizing apparatus of the present invention can be applied mainly in the case of crushing a lump of coal into a fine powder and can be applied in a field where thermal power plants and fine coal particles are used. More specifically, the present invention can be applied to a region where the fuel injecting section 2, the rotating plates 4 and 5, the rotating roller 6, and the extension pipe 3 are configured.

Generally, a differentiator is a machine structure that crushes a small lump of coal, ore, porcelain, wood, grain etc. to a diameter of about 0.07 mm to make fine powder.

More specifically, there is a machine that crushes coal finely, using coal, power, spring, centrifugal force or the like, and an impact type.

In addition, in the case of the coal differentiator, it is recently attracting attention because it is located in a place where fine powder particles of coal, rather than a thermal power plant and other coal lumps, are needed and can quickly and simply provide fine coal particles.

The coal differential apparatus according to the present invention comprises a hopper-shaped fuel injecting unit (2) for crushing coal and having a cylindrical body (1) and located above a central portion of the body (1) And at least one rotating roller (6) for crushing coal by engaging with the rotating plates (4, 5). The rotating plate (4, 5) is disposed on the bottom of the body The fuel injecting section 2 corresponds to a differential device including an extension pipe 3 provided at the lower side of the center of the fuel injecting section 2.

2 schematically shows a differential device including an extension pipe 3 provided at the lower side of the center of the fuel injection section 2 of the conventional differential device. As shown in FIG. 2, the improved differential apparatus induces a uniform distribution of coal particles falling vertically and a stable fall, thereby forming a flat and stable coal bed than a conventional differential apparatus And thus it is possible to control the excessive vibration and noise which the conventional coal differentiator must have.

In order to improve the performance and efficiency of the extension pipe 3 of such an improved differential device, the present invention includes an additional configuration.

4, the structure including the perforated plate 7 on the side surfaces of the hopper-shaped fuel injecting section 2 and the extension pipe 3 is designed so that the secondary air existing in the interior of the differentiator, (3) and the fuel injecting section (2), thereby suppressing the occurrence of vortex and backwash phenomenon.

In Fig. 10, the extension pipe 3 is not simply extended in the vertical direction, but has a tapered shape 3.

As shown in FIG. 10, the extension pipe 3 is formed into the tapered shape 3, thereby positively performing the reverse flow and vortex prevention function.

In addition, the inner face 5 of the rotary plates 4, 5, which is located over the entire bottom of the body 1 of the present invention and has a rotary shaft at the lower central portion of the body, projects upward (5).

The protruding portion is located at a lower portion of the extension pipe 3, and serves to automatically move the lump of coal to be vertically dropped through the fuel input portion 2 and the extension pipe toward the edge of the protrusion.

Since the protruding portion 5 is configured to coincide with the rotary plates 4 and 5 as described above, when the differentiating device is in operation, the lump of coal is moved to the edge of the rotary plates 4,5 by moving in a rotating state Help.

Next, referring to Fig. 9, an extension tube 3 having a limited length according to the present invention will be described.

 9 schematically shows a differential device in which the length of the extension pipe 3 is not less than two times and not more than three times the distance between the lower end of the extension pipe 3 and the upper portion of the projection 5 of the rotary plates 4, have.

As a result, it is possible to prevent the construction in which the extension pipe 3 exists but not to function, and to ensure a uniform distribution of the coal lumps descending in an active vertical direction and a stable fall, The height of the coarse bed which is flat and stable compared to the differential device A of FIG.

Next, one or more rotating rollers 6 for crushing coal by engaging with the rotating plates 4, 5 of the present invention will be described with reference to Fig.

A general coal differential system in the differential apparatus uses a rotary roller 6 to place a block of coal between the rotary plates 4 and 5 and the rotary roller 6 and to rotate the rotary plates 4 and 5 and the rotary roller 6, And the coal is crushed by using the rotational kinetic energy of the coal.

The rotary roller of the present invention is a rotary plate having an extension pipe 3 and a rotating shaft which is disposed over the entire bottom surface of the inner body 1 of the improved differential device B, 4 and 5 and the rotary plates 4 and 5 have an inner face 5 extended from the center by a certain distance and an outer face 4 extending from the fixed distance to the edge, And is configured to rotate by engaging with the external face 4.

As a result, the mass of coal transferred from the projecting portion 5 located on the inner surface 5 can be naturally transferred to the outer surface 4 of the rotating roller 6 by the inertia law of rotation, as described above , And the agglomerates of the coal are placed on the mating surfaces between the rotating plates (4, 5) and the rotating roller (6).

In this case, when the rotary roller 6 is designed on the upper side of the rotary plates 4 and 5 for the purpose of reducing the vibration and noise of the differential device, which is an effect to be achieved by the present invention, It is necessary to prevent unbalanced movement.

Therefore, as shown in FIG. 3, the rotating rollers 6 are placed at three positions so as to be 120 degrees to induce balanced pulverization, thereby reducing vibrations and noise.

In addition to these embodiments, the rotation rollers 6 include such an arrangement as long as the angles to be positioned therebetween are equal to each other and can be arranged at regular intervals.

Next, a description will be made of a differential device including a conical lower distributor 30 provided on an upper portion of the protruding portion 5 and positioned on an upper extension of the rotary shaft.

The rotary shaft located at the center of the rotary plates 4 and 5 which are components of the differential device B of the present invention is extended and the conical lower distribution portion 30 is positioned at the upper end thereof.

The lower distributor 30 rotates while being inserted deeply into the extension pipe 3 so that the lumps of coal introduced through the fuel charging unit 2 and the extension pipe 3 are positively and uniformly supplied to the rotary plates 4, 5 and the projections 5 of the rotary plates 4, 5, respectively.

In addition, since the conical lower distributor 30 is deeply inserted into the interior of the extension pipe 3, it is possible to further prevent the backward flow and vortex of the secondary air.

Additionally, the position of this lower distributor also needs to be limited for optimum effectiveness.

Fig. 5 schematically shows the height limitation of the lower distributor 30. Fig.

Specifically, the cone-shaped lower distributor 30 located on the upper extension of the rotary shaft has its middle point located at the end of the extension tube 3.

As a result, it is possible to prevent the excessive insertion of the deep coal, thereby enabling the ingress and egress of the coal lump smoothly, and effectively preventing the backflow and swirling of the secondary air.

Next, referring to FIG. 6, the conical distribution unit 10 describes a differential apparatus B including a helical guide 12. FIG.

A structure for positively and uniformly transferring coal agglomerates drawn through the fuel injecting section 2 and the extension pipe 3 of the conical distribution section 10 to the projections of the rotary plate and the rotary plate, .

Specifically, a plurality of helical guides 12 are installed on the surface of the conical lower distributor 10 to prevent irregularly transporting the lumps of coal to the lower part, slide on the contact surface of the guide, Function.

7 and 8, the rotating plates 4 and 5 are provided on the upper portion of the protruding portion 5, and are disposed on the upper extension of the rotary shaft and form a lower air flow 20 will be described.

As described above, since the effect and effect of the present invention are to suppress the backward flow and vortex of the secondary air inside the differentiator to form a uniform coil bed, thereby suppressing vibration and noise of the differentiator, Contributes to formation of a uniform coal bed by suppressing the reverse flow and vortex of the secondary air.

Specifically, the lower fan 20, which is located below the extension pipe 3 and is provided on the upper portion of the protrusion 5 and forms an air flow in a downward direction on the upper extension line of the rotary shaft, When the coal lumps are drawn into the extension pipe through the input portion 2, the coal particles naturally fall by the gravity to the upper side of the rotating lower fan 20 connected to the rotation axis of the rotary plates 4,5, (20) continues to rotate and actively moves the coal particles falling from the upper side to the lower part.

As a result, it is possible to transport coal agglomerates more efficiently to the outer surface 4 of the rotary plates 4 and 5 when the projections 5 of the rotary plates 4 and 5 are present, and the amount and the ratio of the coal There is an advantage that smooth formation of a coil bed is achieved because the uniform distribution of the rotating plates 4, 5 is uniform and stable.

In addition, the safety cover 22 having a constant height is designed at the edge of the lower fan, and functions to prevent the chunks of the coal from colliding against the lower fan 20 and scattering in all directions.

In addition, when the characteristics of the fan 20, which always rotates at a high speed, are taken into consideration, the safety cover 22 functions to prevent possible safety accidents or the like.

The lower pan 20 is advantageous in that the formation of the coal bed can be smoothly performed because the coal is uniformly and stably distributed to the lower side of the lower fan 20 and also the cylindrical body 1), thereby contributing to formation of a uniform coal bed by suppressing the above-mentioned problem of backflow and swirling of the secondary air.

Next, referring to Figs. 11 and 12, a differential device including an upper distributor 10 having a plurality of funnel shapes arranged in the circumferential direction on the plane of the lower end of the extension pipe 3 will be described.

Fig. 11 schematically shows an upper distributor 10 having a plurality of funnel shapes.

Specifically, the fuel introduced into the extension pipe 3 through the hopper-shaped fuel distribution portion 2, particularly, the coal is supplied to the upper distribution portion 10 located at the edge of the extension pipe 3 in the circumferential direction by gravity It is transported naturally.

Therefore, there is an advantage that formation of a coal bed can be smoothly performed because the coal lumps are uniformly and stably distributed to the lower side without the construction of a special additional apparatus.

The sum of the original widths of the holes of each distributing portion of the upper distributing portion 10 having a plurality of funnel arrangements arranged on the plane of the lower end of the extending pipe 3 in the circumferential direction is smaller than the original width of the extending pipe This configuration contributes to formation of a uniform coal bed by suppressing the backward flow and vortex of the secondary air, which has been described above.

The plurality of upper distributing sections 10 may be arranged in the circumferential direction in various arrangements in addition to the arrangements shown in the drawings.

Next, referring to Figs. 13 and 14, a differential device including an upper fan 40 that annularly surrounds the side surface of the extension pipe 3 and forms an air flow in a downward direction will be described.

Fig. 13 schematically shows an upper fan 40 annularly surrounding the side of the extension pipe 3 and forming an air flow in the downward direction.

Specifically, the purpose and effect of the present invention is to suppress the backward flow and vortex of the secondary air inside the differentiator to form a uniform coil bed, thereby suppressing vibrations and noise of the differentiator. Therefore, This suppresses backflow and vortex of the secondary air, thereby contributing to formation of a uniform coal bed.

Therefore, unlike the above-described lower fan 20, the upper pan 40 is located at the side of the extension pipe 3 and rotates at a constant speed. In this case, unlike the above-described lower fan 20, But also forms a flow field of air to suppress backflow and vortex of the secondary air, thereby contributing to formation of a uniform coal bed.

In addition, a fan cover 41 of a constant height is designed at the edge of the upper fan 40 to prevent the flow of air generated in the upper fan from being scattered irregularly, Which acts as a guide for the flow of air to proceed.

In addition, when the characteristics of the fan 40, which always rotates at a high speed, are taken into account, a safety cover function for preventing possible safety accidents or the like is performed.

The fuel injector 2, the extension pipe 3 and the differential device B for reducing the vibratory motion of the microprocessor according to the present invention as described above can reduce the vibration and noise of the conventional differential device by using the perforated plate 7 It is possible to reduce the vibration and noise by providing the extension pipe 3 and the fuel inlet 2 designed on the surface and controlling the length and the angle of the extension pipe 3 as well as providing a lower distributor and a lower fan in the form of a cone or fan , It prevents the reverse flow to the extension pipe of the secondary air existing in the inside of the differentiator and the refueling part of the fuel to help the uniform and stable formation of the coal bed and to control the excessive vibration and noise of the conventional differential device more actively There is an effect.

The present invention is not limited to the above-described specific embodiment and description, and various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention as claimed in the claims. And such modifications are within the scope of protection of the present invention.

A: Conventional differential device
B: The differential device of the present invention
1: Cylindrical body
2: fuel injection part
3: extension tube
4: External face (rotating plate)
5: Inner face (rotating plate)
6: rotating roller
7: Perforated plate
10: upper distributor
11: Upper extension line of the rotary shaft
12: Guide
20: Lower fan
21: upper extension line of the rotary shaft
22: Safety cover
23: Safety cover fixing bar
30: Lower distributor
31: Lower distributor part fixing plate
40: upper fan
41: Safety cover

Claims (14)

A pulverizing apparatus for pulverizing coal and having a cylindrical body,
A hopper-shaped fuel injecting unit positioned above the center of the body and having a side surface of a perforated plate;
A rotating plate disposed over the entire bottom of the body and having a rotating shaft at a lower central portion of the body;
And at least one rotating roller disposed at a predetermined interval in the circumferential direction on the surface of the rotating plate to crush the coal to engage with the rotating plate,
Wherein the fuel injecting portion includes a tapered extension pipe having a side surface provided on the lower side of the center of the fuel injecting portion,
The rotation plate extends from the center to a predetermined distance, and has an inner inner surface having a protruding portion protruding upward with respect to the rotation axis, and an outer surface extending from the predetermined distance to an edge of the rotating plate. ,
Wherein the length of the extension pipe is at least two times and at most three times the distance between the lower end of the extension pipe and the upper portion of the protrusion of the rotary plate and the upper part having a plurality of funnel shapes arranged in the circumferential direction on the plane of the lower end of the extension pipe Distribution; And an upper fan which annularly surrounds the side of the extension pipe and forms an air flow in a downward direction,
Wherein the rotary plate includes a conical lower distributing portion provided on an upper portion of the protruding portion and positioned on an upper extension of the rotary shaft.
A pulverizing apparatus for pulverizing coal and having a cylindrical body,
A hopper-shaped fuel injecting unit positioned above the center of the body and having a side surface of a perforated plate;
A rotating plate disposed over the entire bottom of the body and having a rotating shaft at a lower central portion of the body;
And at least one rotating roller disposed at a predetermined interval in the circumferential direction on the surface of the rotating plate to crush the coal to engage with the rotating plate,
Wherein the fuel injecting portion includes a tapered extension pipe having a side surface provided on the lower side of the center of the fuel injecting portion,
The rotation plate extends from the center to a predetermined distance, and has an inner inner surface having a protruding portion protruding upward with respect to the rotation axis, and an outer surface extending from the predetermined distance to an edge of the rotating plate. ,
Wherein the length of the extension pipe is at least two times and at most three times the distance between the lower end of the extension pipe and the upper portion of the protrusion of the rotary plate and the upper part having a plurality of funnel shapes arranged in the circumferential direction on the plane of the lower end of the extension pipe Distribution; And an upper fan which annularly surrounds the side of the extension pipe and forms an air flow in a downward direction,
Wherein the rotary plate is provided on the upper portion of the projection and includes a lower fan positioned on an upper extension line of the rotary shaft and forming an air flow in a downward direction.
delete delete delete delete The method according to claim 1,
And the cone height midpoint of the cone-shaped lower distributing portion is located at the same height as the lower end of the extension tube.
delete delete delete delete delete 2. The apparatus of claim 1, wherein the cone-shaped dispensing portion includes a helical guide. delete

Images