JPH0585447U - Crusher - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a crusher which prevents aggregation of fine powder and improves crushing efficiency. [Structure] An agitator 5 is provided in the crushing tank 1. A classification device 30 is provided above the crushing tank 1. Classifier 3
0 consists of a classifying device body 10 having a raw material supply port 22 and a gas port 23, and a classifying cylinder 11 having a vane 12. A suction port 13 of a lead-out tube 14 penetrating from the outside is opened in the classifying tube 11. The outlet pipe 14 is a bag filter 17
And communicates with the blower 19. An impeller 41 is provided below the classification tube 11. A gas supply device 6 is provided at the bottom of the crushing tank 1. After the raw material C is pulverized into fine powder by the rotation of the agitator 5, the fine powder is carried by the gas A supplied from the gas supply device 6 and rises. Blower 1 in the classification tube 11
Since a negative pressure acts on the fine powder 9, fine powder and gas B are sucked in through the vane 12. A swirl flow is generated in the classification cylinder 11 by the vane 12 to classify the fine powder. The product is carried out through the outlet pipe 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pulverizer, and more particularly, to a pulverizer which is capable of producing a fine powder product by stirring and pulverizing raw materials put into a pulverization tank.

[0002]

[Prior art and its problems]

 Conventionally, a raw material, which is a crushing material, is put into a cylindrical crushing tank, and the raw material is crushed into fine powder particles by agitating the raw material with a medium contained in the crushing tank. In a pulverizer designed to obtain a product, especially in the case of a dry pulverizer, when the raw material is pulverized into fine powdery granules, the finely powdered granules are stored in the grinding tank. There was a case where the particles were aggregated inside and the pulverization process was balanced.

Generally speaking, since finely divided powder and granules have a strong aggregation property, the raw material once pulverized into fine powder inside the grinding tank is strongly stirred together with the media. Nevertheless, they will re-aggregate inside the grinding tank.

Therefore, when the crushing action and the aggregating action are repeated in the crushing tank, the crushing process is in equilibrium and the progress of the crushing process is apparently stopped, so that the powder obtained as a product is obtained. The ultimate particle size of the granules is limited, and as a result, the grinding efficiency is reduced.

The present invention solves the above problems and prevents the raw material pulverized into fine powder from being re-aggregated in the course of the pulverization process, thereby improving the pulverization efficiency. The purpose is to provide a crusher.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the first invention is, as a first invention, an agitator which has a vertical cylindrical shape with an upward opening and rotates about its axis. Is provided inside, a classifying device that is connected to the crushing tank to form a void inside, and a classifying device that is provided in this classifying device to communicate the void with the outside. A classifying device having a gas inlet, and the classifying device is provided with a classifying device main body having a gas port and a downward opening inside the classifying device main body. And a classification tube having a vane for guiding the gas existing in the cavity to the inside in a tangential direction, and the outlet tube is located coaxially with the classification tube and has an intake port. In front Inside of the classifying tube is intended to have a structure that is open. In addition, as a second invention including the first invention, there is provided a structure in which a gas supply device for supplying gas from the outside to the inside of the crush tank is provided at the bottom of the crush tank. .. In addition, as a third device including the first device, there is provided a configuration in which a cap-shaped impeller is provided at an upper end of an axial center of the agitator in a state of being slightly separated from a lower opening of the classification tube. It is what you are doing. In addition, as a fourth invention including the first invention, it has a structure in which a raw material supply port is provided at an arbitrary position of the classification apparatus main body.

[0007]

[Action]

 This device adopts the above means, and when the raw material to be pulverized is put into the pulverization tank through the raw material supply port, the raw material is pulverized into fine powder by the rotation of the agitator, and then the product is passed through the outlet pipe. Will be carried out to the outside.

At this time, the fine powder generated by crushing the raw material rises to the classifier side by the gas supplied from the gas supply device to the inside of the crush tank, and then the fine powder is classified by the classifier. It is like this.

As a result, agglomeration of fine powder is prevented inside the grinding tank.

First, when gas is sucked in through the suction port of the outlet pipe, the inside of the classifying cylinder becomes a negative pressure. Therefore, the fine powder that has risen from the pulverization tank is discharged through the gas port formed in the classifier body. It is sucked into the inside of the classification tube through the vane together with the introduced gas. At this time, since the gas is directed tangentially when passing through the vane, a swirling airflow is generated inside the classifying tube, and a centrifugal force is applied to the fine powder by the action of this gas airflow.

Then, inside the classifying tube, among the fine particles, small particles and light particles are separated to the inside, and large particles not reaching a predetermined particle size and coarse particles composed of heavy particles are separated to the outside. After that, fine powder consisting of small particles and light particles is sucked into the outlet pipe together with gas and is carried out as a product to the outside.

Therefore, the fine powder obtained by crushing the raw material is separated according to the particle size of the fine powder by the classifying action of the classifying device, and then the fine powder particles having reached the predetermined particle size are successively obtained by the suction action of the outlet pipe. As it comes to be extracted from the inside of the crushing tank, as a result, the fine powder is prevented from aggregating inside the crushing tank.

On the other hand, the coarse powder separated inside the classification tube falls into the inside of the crushing tank through the opening at the lower end of the classification tube. At this time, the coarse powder is separated from the crushing tank by the impeller located below the classification tube. The inside is guided outward, whereby the coarse powder is suitably guided to the rotating portion of the agitator, and the crushing process is performed again.

[0014]

【Example】

 Embodiments of the present invention shown in the drawings will be described below.

FIG. 1 is a diagram showing an embodiment of a crusher according to the present invention, and FIG. 2 is a diagram showing an essential part of this idea.

That is, the crusher shown in FIG. 1 and FIG. 2 has an agitator 5 that has a vertical cylindrical shape with an upward opening and is rotated by an external motive force on an upper portion of a frame 8 that forms a base. Is provided inside, and a classification device 30 that is continuously provided on the opening side of the crushing tank 1. Further, the classification device 30 is provided coaxially with the classification device 30, 1 and a classifying device 30 are connected to an outer space 31 and an outlet pipe 14 for applying a negative pressure to the empty space 31 is provided. The raw material C is crushed inside the crushing tank 1 and then classified by the classifying device 30 and then guided to the outside through the outlet pipe 14 as a product.

The classifying device 30 in this crusher has a raw material supply port 22 and a gas port 23, and a classifying device main body 10 that cooperates with the crushing tank 1 to form an internal cavity 31 and an internal The classification pipe 11 is provided with the outlet pipe 14 opened on the axis and has a vane 12 that guides the gas existing outside to generate a swirling airflow. The gas port 23 has a gas inlet 23. A gas supply device 6 for supplying a gas to the inside of the crushing tank 1 is provided on the bottom of the crushing tank 1 corresponding to the vanes 12 of the classifying apparatus main body 10. ..

In FIG. 1, the crushing tank 1 has a vertical cylindrical shape that opens upward, and is placed on an upper portion of a frame 8 that forms a base. An agitator 5 that rotates by an external driving force is provided inside the crushing tank 1, and the rotation of the agitator 5 crushes the raw material C supplied into the crushing tank 1 into fine powder. I'm sorry.

The agitator 5 provided inside the crushing tank 1 is formed by a rotary shaft 4 a penetrating from the outside of the crushing tank 1 and an arm 4 b attached thereto.

The rotating shaft 4 a forming one side of the agitator 5 is rotatably supported by passing through a hole formed at the center of the bottom surface of the crushing tank 1. At this time, the crushing tank 1 An annular gap e is formed in the penetrating portion of the rotating shaft 4a in the above, and the inside and the outside of the crush tank 1 are electrically connected via this gap e.

The lower part of the rotating shaft 4a is inserted into the bearing box 7 attached to the frame 8 below the crushing tank 1 and extends downward. The bearing box 7 and the rotating shaft 4a are It is rotatably supported by a bearing (not shown) provided between the two.

An arm 4b forming the other side of the agitator 5 is attached to the rotary shaft 4a, and the rotary shaft 4a and the arm 4b are integrally formed. The arm 4b has a rod-like or wing-like shape and is radially attached to the portion of the rotating shaft 4a located inside the crushing tank 1 with the axis of the rotating shaft 4a as a center, and in that state, the axial direction of the rotating shaft 4a. It is formed in multiple steps toward.

At this time, although not shown, a pulley is arranged at the lower end of the rotary shaft 4a, and this pulley is further connected to the motor 9 as a drive source inside the frame 8 via a belt. In this way, the rotation shaft 4a is rotated by the driving force of the motor 9.

A gas supply device 6 is provided on the outer wall surface of the bottom of the crushing tank 1. The gas supply device 6 has a tubular shape, and is arranged so that the rotary shaft 4a of the agitator 5 is located inside the gas supply device 6 with a required space therebetween. At this time, one opening of the gas supply device 6 is positioned so as to face the gap e formed in the hole on the bottom surface of the crushing tank 1, whereby the inner space of the gas supply device 6 is formed into the gap e. The inside of the crushing tank 1 is electrically connected via the.

The other opening of the gas supply device 6 is closed by the provision of the seal ring 25, and the seal ring 25 makes it possible to freely rotate between the gas supply device 6 and the rotary shaft 4 a of the agitator 5. The inside of the gas supply device 6 is hermetically sealed.

A gas supply port 6 a is provided at an arbitrary position on the circumference of the gas supply device 6, and a pipe for connecting the gas supply port 6 a and an external gas supply source 24 to each other. Is connected to guide the gas A generated from the gas supply source 24 into the gas supply device 6.

On the other hand, a classification device 30 is provided above the crushing tank 1. This classifying device 30 is composed of a classifying device main body 10 and a classifying tube 11 having a vane 12. The classifying device 30 allows the raw material C pulverized into a fine powder inside the crushing tank 1 to have different sizes and sizes. It is separated and sorted according to its weight and classified.

The classifying device main body 10 forming the classifying device 30 has a substantially cylindrical shape that opens downward, and has a raw material supply port 22 at an arbitrary position thereof. By continuously connecting the crushing tank 1 to the upper opening of the crushing tank 1, the crushing tank 1 is formed into a right-cylindrical shape with both ends closed. A vacant space 31 is formed between and.

A classification tube 11 is attached to the classification device body 10. The classification cylinder 11 has a shape of an inverted conical bottom with a bottom opening and is arranged such that its axis is coaxial with the axis of the grinding tank 1 inside the classification device body 10. The fine powdery raw material C crushed inside 1 is subjected to a classification treatment inside the classifying tube 11 to be separated and classified into fine powder and coarse powder.

As shown in FIG. 3, the classification cylinder 11 is provided with vanes 12 for guiding the gas and fine powder existing outside the classification cylinder 11 to the inside on an arbitrary circumference thereof. In particular, due to the presence of the vane 12, when the gas existing outside the classifying tube 11 passes through the vane 12, the gas is guided inside the classifying tube 11 in the tangential direction thereof, and I try to direct the airflow.

Further, a gas port 23 communicating with the outside is formed at a required portion of the part of the classifying device body 10 corresponding to the vane 12 of the classifying cylinder 11, and the secondary gas B outside the classifying device body 10 is formed. Is introduced into the interior through the gas port 23.

Reference numerals 15 and 16 are bolts, the bolt 15 is for fixing the classification device body 10 to the crushing tank 1, and the bolt 16 is for fixing the classification tube 11 to the classification device body 10. belongs to.

An impeller 41 is disposed below the classifying tube 11 of the classifying device 30 so as to face the lower end opening of the classifying apparatus 11 and be spaced apart therefrom by a required distance. The impeller 41 has a substantially cap-like shape as a whole, and its bottom is connected to the upper end of the rotating shaft 4a of the agitator 5. The inclined surface of the impeller 41 causes the impeller 41 to open from the lower end opening of the classification tube 11. Pre-classified coarse powder that falls is guided inside the grinding tank 1.

The classifying device body 10 is provided with a lead-out pipe 14 that penetrates the central portion of the upper end surface of the classifying tube 11 from the outside and opens downward. The outlet end of the lead-out pipe 14 located inside the classifying tube 11 serves as a return port 13b. Further, as shown in FIG. 4, in the inside of the classifying tube 11, a portion of the outlet pipe 14 corresponding to the vane 12 has a suction port 13 in which slit-shaped holes 13a are formed in multiple lines. The suction port 13 allows the fine powder classified in the classifying tube 11 to be sucked and guided into the discharge tube 14 together with the gas.

The outlet pipe 14 is connected at its other opening to a bag filter 17 provided outside, so that the classification cylinder 11 and the bag filter 17 are electrically connected to each other via the outlet pipe 14. The fine powder and gas classified inside the classifying tube 11 are guided to the bag filter 17.

The bag filter 17 is for capturing and collecting the fine powder guided by the outlet pipe 14 and allowing gas to pass therethrough. The outlet pipe 14 communicates with the blower 19 with the bag filter 17 interposed. However, the gas that has passed through the bag filter 17 is positively discharged to the outside by the blower 19.

Reference numeral 18 denotes an outlet, and the fine powder collected by the bag filter 17 is taken out as a product from the outlet 18.

An outer cylinder 2 is provided so as to cover the outer side of the crushing tank 1 at a required interval, thereby forming a flow passage between the crushing tank 1 and the outer cylinder 2. I am trying to make it. Then, an introduction nozzle 20 for introducing the heat medium or the refrigerant body into the flow passage formed between the outer cylinder 2 and the crushing tank 1 is attached, and the introduced heat medium or the refrigerant body is introduced. A discharge nozzle 21 for discharging is attached.

Further, 3 is a medium, and a plurality of media are scattered inside the crushing tank 1. The rotation of the agitator 5 stirs the raw material C located inside the crushing tank 1 together with the medium 3 to produce the raw material C. It efficiently grinds.

Next, the operation of the above will be described.

First, the raw material C to be crushed is introduced from the raw material supply port 22 formed in the classifier body 10, the raw material C is positioned inside the crushing tank 1, and then the motor 9 is started. The pulley rotates via a belt (not shown), and the agitator 5 rotates.

Then, by the rotation of the arm 4b of the agitator 5, the charged raw material C is stirred together with the media 3, and the raw material C is generated by the impact force and shearing force generated between the raw material C and the arm 4b and the medium 3. It will be pulverized into fine powder.

At this time, the gas supply device 6 provided at the bottom of the crushing tank 1 is supplying the gas A into the crushing tank 1, whereby the raw material C is crushed inside the crushing tank 1. The resulting fine powder rises toward the classifier 30 side using the gas A as a carrier.

In this case, since the space 31 formed between the crushing tank 1 and the classifier body 10 communicates with the outside through the outlet pipe 14 and the blower 19, the crushing tank of the gas supply device 6 The supply of the gas A into 1 is continuous.

Here, since the fine powder that has risen in the inner space 31 contains coarse powder that has not reached a predetermined particle size, the fine powder is classified by the classification device 30 and divided into fine powder and coarse powder. Will be separated.

First, since the inside of the classifying tube 11 of the classifying device 30 and the blower 19 are electrically connected to each other through the outlet pipe 14, when the blower 19 operates so as to blow the internal gas to the outside, Due to the action, a negative pressure is generated in the suction port 13 of the outlet pipe 14, and the pressure inside the classification tube 11 is discharged to the outside from the suction port 13 via the outlet pipe 14, the bag filter 17 and the blower 19. Like

As a result, the pressure inside the classifying cylinder 11 becomes lower than the outside, so that the gas existing outside the classifying cylinder 11 in the internal space 31 is accompanied by the fine powder that has risen above the inside of the grinding tank 1. It is sucked into the inside of the classification tube 11 through the vane 12.

In this case, since the gas port 23 that communicates with the outside is formed in the portion corresponding to the vane 12 in the classifying device main body 10, the suction force generated in the vane 12 causes the gas to leak to the outside of the classifying device 30. The existing secondary gas B (here, the atmosphere) is continuously introduced into the inside of the classifying device main body 10 through the gas port 23, so that the suction action of the vane 12 of the classifying tube 11 is continued. Is becoming

At this time, the secondary gas B drawn into the classifying tube 11 is guided in the tangential direction inside the classifying tube 11 when passing through the vanes 12. As shown in FIG. 3, the air flow of the secondary gas B appears as a swirling swirl flow around the suction port 13 of the outlet pipe 14 inside the classifying tube 11.

Therefore, the fine powder sucked into the classifying tube 11 together with the secondary gas B is swirled in the circumferential direction along the inner wall of the classifying tube 11 by the action of the swirling air flow of the secondary gas B. As a result, centrifugal force is applied to the fine powder, and as a result, among the particles that make up the fine powder, small particles and light particles are inside as fine powder, and large particles and heavy particles that do not meet the prescribed size are coarse particles. As a result, they will be separated and classified outside.

Then, the coarse powder separated to the outside inside the classifying tube 11 whirls along the inner wall of the classifying tube 11 as it loses kinetic energy, slides down, and falls onto the upper surface of the impeller 41. After that, the coarse powder is guided outward along the inclined surface of the impeller 41, and further pulverized inside the pulverization tank 1.

On the other hand, the fine powder separated inside the classifying tube 11 is sucked into the outlet pipe 14 through the suction port 13 along with the swirling flow of the secondary gas B. At this time, since the swirling airflow of the secondary gas B is also generated inside the outlet pipe 14, the fine powder sucked into the outlet pipe 14 is further classified inside the outlet pipe 14 and is small. Particles and light particles are separated inside and large particles and heavy particles are separated outside in the outlet pipe 14, respectively.

Then, the large particles and heavy particles in the fine powder separated inside the outlet pipe 14 fall on the upper surface of the impeller 41 from the return port 13b at the lower end of the outlet pipe 14 as they are, and inside the grinding tank 1. The crushing process is performed again.

On the other hand, the fine powder composed of small particles and light particles separated inside the outlet pipe 14 is conveyed to the bag filter 17 through the outlet pipe 14 by using the secondary gas B as a carrier by the suction action of the blower 19. To be done.

Then, the fine powder is captured and collected by the bag filter 17, and the fine powder is obtained as a product. At this time, the secondary gas B, which was a fine powder carrier, passes through the bag filter 17 and is positively discharged from the blower 19 to the outside.

In the above case, since the classification device 30 is provided above the crushing tank 1, the fine powder generated as a result of crushing the raw material C inside the crushing tank 1 aggregates inside the crushing tank 1. This is prevented, and the crushing process inside the crushing tank 1 can be efficiently performed.

That is, the raw material C pulverized into a fine powder inside the pulverization tank 1 is classified by the classifying device 30 to be separated and classified into fine powder and coarse powder. Since the product is quickly extracted from the outlet pipe 14, the fine powder does not remain inside the grinding tank 1 for a long time. Therefore, the fine powder is prevented from aggregating inside the crushing tank 1, and the crushing efficiency is improved.

Further, as described above, by rapidly extracting the fine powder having the predetermined particle size from the crushing tank 1, only the coarse powder that needs to be crushed is located inside the crushing tank 1. As a result, the crushing speed can be increased, and along with this, the crushing efficiency can be improved.

In the crusher of the above-described embodiment, the raw material C is divided into several times and supplied to the pulverization tank 1 to be pulverized, and the raw material C is obtained as a product each time. Either of the continuous treatments in which the raw material C is more continuously supplied to perform the pulverization treatment is possible.

[0060]

[Effect of the device]

 As described above, according to the present invention, by providing a classifying device in the grinding tank to form a grinder, fine powder obtained by grinding inside the grinding tank is classified as a product after being classified by the classifying device. Since the particles are guided to the outside, only particles having a predetermined particle size among those constituting the fine powder can be obtained as a product with this classifying device, and the quality and accuracy of the product can be improved.

The fine powder having a predetermined particle size inside the crushing tank is sequentially withdrawn from the discharge pipe to the outside, so that the fine powder is prevented from staying inside the crushing tank. This makes it possible to prevent the fine powder from agglomerating in the grinding tank. Therefore, there is an effect that the crushing process in the crushing tank is performed faster, and the crushing efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a crusher according to the present invention.

FIG. 2 is a view showing a main part of the crusher shown in FIG.

FIG. 3 is a diagram showing a positional relationship between a classification tube and a lead-out tube.

FIG. 4 is a vertical cross-sectional view illustrating a suction port of a lead-out pipe.

[Explanation of symbols]

 1 ... Grinding tank 2 ... Outer cylinder 3 ... Media 4a ... Rotating shaft 4b ... Arm 5 ... Agitator 6 ... Gas supply device 6a ... Gas supply port 7 ... Bearing box 8 ... Frame 9 ... … Motor 10 …… Classification device main body 11 …… Classification cylinder 12 …… Vane 13 …… Suction port 13a …… Hole 13b …… Return port 14 …… Outlet pipe 15, 16 …… Bolt 17 …… Bag filter 18 …… Outlet 19 ...... Blower 20 ...... Injection nozzle 21 ...... Ejection nozzle 22 …… Raw material supply port 23 …… Gas port 24 …… Gas supply source 25 …… Seal ring 30 …… Classification device 31 …… Vacancy 41 …… Impeller e …… Gap A …… Gas B …… Secondary gas C …… Raw material

Claims (4)

[Scope of utility model registration request] 1. An agitator (5) having a vertical cylindrical shape that opens upward and rotates about its axis.
Is provided inside, a classifying device (30) connected to the crushing tank (1) to form a void (31) inside, and a classifying device (30) The vacant space (31) communicates with the outside, and a discharge pipe (14) having an inlet (13) opening to the vacant space (31) side is provided, and the classification device (30) is a gas A classifying device body (10) having a mouth (23) is provided inside the classifying device body (10) so as to open downward, and the gas present in the void (31) is directed tangentially. Is formed with a classification tube (11) having a vane (12) for guiding the inside, and further, the outlet pipe (14) is positioned coaxially with the classification tube (11) and has an intake port. Open (13) inside the classification tube (11). Grinder, characterized in that the. 2. The crusher according to claim 1, wherein a gas supply device (6) for supplying gas (A) from the outside to the inside of the crush tank (1) is provided at the bottom of the crush tank (1). 3. The shaft center upper end of the agitator (5),
The crusher according to claim 1, wherein a cap-shaped impeller (41) is provided in a state in which the impeller (41) is slightly separated from the lower opening of the classification tube (11). 4. The crusher according to claim 1, wherein a raw material supply port (22) is provided at an arbitrary position of the main body (10) of the classification device.