JP6779246B2 - Crushing device with classification function and crushing method of the object to be processed - Google Patents

Description

The present invention relates to a crushing apparatus with a classification function and a method for crushing an object to be processed, in which an object to be crushed that is not sufficiently pulverized is returned from the classifying portion to the pulverized portion through an internal casing.

Conventionally, various crushing devices for crushing resins, minerals, and food raw materials have been used. Some crushers of this type have a classification function in order to reduce the particle size after crushing. For example, as in Patent Document 1, the outer casing, the inner casing forming a partitioned space in the outer casing, the input port for charging the object to be processed into the inner casing, and the lower part of the inner casing are provided. A subject formed between a crushing chamber provided with a crushing portion for crushing an object to be processed, an airflow inlet for introducing an airflow into the crushing chamber, and an inner casing and an outer casing, and crushed and blown up in the crushing chamber. It is provided with a blow-up passage through which the processed material is passed and a classifying portion provided above the inner casing to classify the material to be processed that is air-borne from the blow-up passage. A crushing device with a classification function that returns to the crushing part is known.

Japanese Unexamined Patent Publication No. 2016-159267

In a conventional crushing apparatus having a classification part as in Patent Document 1, in order to efficiently guide the charged raw materials to the crushing part, all the raw materials charged from the charging port are first guided to the crushing chamber in the inner casing. Be taken.

However, in this method, raw materials having a small particle size can be crushed without exception even if they are not crushed. Therefore, the crushing energy is wasted, which is inefficient.

In addition, there are many crushing applications in which the generation of fine powder (over-crushing) is desired to be prevented as much as possible. In this case, the raw materials are classified first and only the raw materials having a coarse particle size are crushed. However, in this case, there is a problem that classification equipment is required for the pre-process, which leads to an increase in equipment cost and process.

The present invention has been made in view of the above points, and an object of the present invention is to improve efficiency by pulverizing only raw materials that require pulverization.

In order to achieve the above object, in the present invention, the raw material input from the input port is first sent to the classification unit.

Specifically, in the first invention, the crushing device with a classification function is
With the outer casing
The inner casing that forms the partitioned space inside the outer casing,
A crushing chamber provided below the inner casing and provided with a crushing portion for crushing the object to be processed, and
An airflow inlet that introduces airflow into the crushing chamber and
A blow-up passage formed between the inner casing and the outer casing and passing an object to be crushed and blown up in the crushing chamber,
A classification unit provided on the upper part of the inner casing and classifying the object to be processed, which is airflow-conveyed from the blow-up passage.
The inside of the blow-up passage is provided with an input port for inputting the object to be processed.
The object to be treated, which is not sufficiently pulverized, is configured to be refluxed from the classification portion to the pulverized portion through the internal casing.

Further, in the second invention, a pulverizer with a classification function similar to that of the first invention is prepared.
The object to be processed is put into the blow-up passage from the inlet,
The object to be treated is introduced into the classification part, passed through the object to be processed having a predetermined particle size, discharged from a discharge pipe provided in the inner casing, and a coarse object to be processed which does not reach the predetermined particle size is passed through the inner casing by its own weight. Drop it in the crushing chamber and
The object to be crushed in the crushing chamber is blown up again in the blowing passage and raised to the classification section.

According to these configurations, the object to be processed, which is charged from the inlet, is first classified toward the classification section instead of immediately heading to the crushing chamber, so that the object to be processed having a small particle size that does not require crushing is used. Useless crushing work can be avoided. Therefore, the object to be treated having a small particle size when it is put in is classified in the classification section and is not crushed to be smaller than necessary, so that fine powder is not generated.

As described above, according to the present invention, only the raw materials that need to be crushed are crushed by throwing all the objects to be charged from the inlet into the blow-up passage and directing them toward the classification section. In addition to being able to improve efficiency, it is possible to suppress the generation of unnecessary fine powder and sharpen the product particle size distribution.

It is sectional drawing which shows the crushing apparatus with a classification function. It is the schematic which shows the crushing system which includes the crushing apparatus with a classification function which concerns on embodiment of this invention. It is a perspective view which shows the crushing apparatus with a classification function.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

-Composition of crushing system-
FIG. 2 shows an outline of a crushing system 10 including a crushing device 1 with a classification function according to an embodiment of the present invention, and the crushing system 10 includes a feeder 2 for supplying a raw material to the crushing device 1. The raw material as the object to be processed supplied from the feeder 2 is configured to be supplied to the input port 11a of the crushing device 1 via the supply rotary valve 3. On the other hand, the object to be crushed by the crushing device 1 is conveyed to the bag filter 4 together with the air flow by the exhaust fan 6. Then, the air flow and the crushed product are separated in the bug filter 4, and the rotary valve 5 for the bug filter can be operated to take out the crushed product. The exhaust fan 6 is connected to the downstream side of the bag filter 4 and is configured so that the air in the crushing system 10 is discharged to the atmosphere.

As shown in FIGS. 1 and 3, the crushing device 1 has a cylindrical outer casing 1a, and a cylindrical inner casing 1b having a smaller diameter is coaxially fixed inside the outer casing 1a. A crushing chamber 11 is also coaxially coupled below the inner casing 1b. For example, two airflow introduction ports 11b are formed symmetrically with respect to the central axis in the tangential direction of the crushing chamber 11. Further, a partition wall (not shown) having a hole in the center is formed between the airflow introduction port 11b and the rotor 12. The airflow introduction port 11b may be provided at one location, and does not necessarily have to be formed in the tangential direction.

A rotor 12 rotates in the lower part of the crushing chamber 11. The rotor 12 is driven by a drive unit 7 provided below the crushing chamber 11. Specifically, the rotating shaft 14 is rotated by a driven-side pulley driven by a V-belt mounted on a drive-side pulley (not shown) provided at the lower end of the crushing electric motor 13 (shown only in FIG. 2). , The rotor 12 which is integrally connected to the rotating shaft 14 is rotated. A cylindrical (ring-shaped) crushing liner 15 as a crushing portion is fixed to the inner peripheral surface of the crushing chamber 11. On the other hand, a plurality of crushing blades 16 as crushing portions are also attached to the outer periphery of the rotor 12 so that the tip is close to the crushing liner 15.

Further, above the inner casing 1b, for example, a classification unit 17 that is driven by a classification electric motor 17a and classifies the crushed object to be processed is arranged.

Then, between the inner casing 1b and the outer casing 1a, a blow-up passage 1c is formed through which the object to be crushed and blown up in the crushing chamber 11 passes. Between the classification unit 17 and the crushing chamber 11, an input port 11a for charging an object to be processed is provided so as to communicate with the outer casing 1a. The charging port 11a is formed inside a cylindrical body inserted so as to have an appropriate loading angle with respect to the outer casing 1a, and communicates with the inside of the blow-up passage 1c of the outer casing 1a.

On the other hand, from the lower surface of the classification portion 17, a discharge pipe 11c for discharging the object to be processed penetrates the inner casing 1b and extends to the outside of the outer casing 1a.

The airflow from the airflow inlet 11b passes between the bottom surface of the crushing chamber 11 and the partition wall toward the rotating shaft 14, passes through the hole in the center of the partition wall, and then passes between the disk 12a of the rotor 12 and the partition wall. It goes to the crushing chamber 11 and passes through a blow-up passage 1c formed between the outer casing 1a and the inner casing 1b that divides the inside of the outer casing 1a while soaring the object to be processed.

For this reason, all the objects to be processed that have been introduced into the blow-up passage 1c from the input port 11a are first blown up and air-flowed to the upper classification unit 17, and the objects to be processed having a predetermined particle size pass through the discharge pipe 11c. It is designed to be discharged to the outside of the device through it. On the other hand, those having not reached the predetermined particle size fall into the inner casing 1b and are crushed in the crushing chamber 11.

-Operation of crushing system-
In the crushing system 10 configured in this way, as shown in FIG. 2, the object to be charged into the feeder 2 is charged from the feeder 2 into the charging port 11a above the crushing chamber 11. In this charging step, the objects to be treated include those having a small particle size that do not already need to be pulverized.

Next, all the objects to be charged from the inlet 11a into the blow-up passage 1c in the gap between the inner casing 1b and the outer casing 1a are blown up by the updraft in the blow-up passage 1c.

Next, the blown-up object reaches the classification unit 17. In the classification unit 17, the object to be treated having a predetermined particle size passes through the classification unit 17 and is discharged from the discharge pipe 11c of the inner casing 1b. The object to be treated, which has a small particle size when it is charged, is classified in the classification unit 17 and is not crushed smaller than necessary, so that over-crushing does not occur. On the other hand, the coarse object to be treated, which does not reach the predetermined particle size, does not pass through the classification portion 17 and falls in the inner casing 1b due to its own weight to reach the crushing chamber 11.

Next, the object to be processed discharged from the discharge pipe 11c is conveyed to the bag filter 4 together with the air flow by the exhaust fan 6. Then, the air flow and the crushed product are separated in the bag filter 4, and the crushed product is taken out by operating the rotary valve 5 for the bag filter.

On the other hand, the object to be processed that has fallen into the crushing chamber 11 is finely crushed by the crushing blade 16 and the crushing liner 15, and then blown up by the air flow introduced from the bottom of the crushing chamber 11 and passed through the blow-up passage 1c. It is introduced to the classification section 17 again.

Therefore, according to the crushing apparatus 1 with a classification function according to the present embodiment, all the objects to be processed charged from the charging port 11a are charged into the blow-up passage 1c so as to first head toward the classification unit 17. The efficiency can be improved by crushing only the raw materials that need to be crushed, and the generation of unnecessary fine powder can be suppressed to sharpen the product particle size distribution.

(Other embodiments)
The present invention may have the following configuration with respect to the above embodiment.

That is, in the above embodiment, the classification unit 17 driven by the classification electric motor 17a is provided, and the particle size for classification is adjusted according to the rotation speed of the classification electric motor 17a, but the inflowing wind speed without using power. May be used as a cyclone type classification unit for adjusting the particle size by adjusting.

It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and applications.

Crusher with 1 classification function
1a External casing
1b internal casing
1c Blow-up passage
2 Feeder
3 Supply rotary valve
4 Bug filter
5 Rotary valve for bug filter
6 Exhaust fan
7 Drive unit
10 Crushing system
11 Crushing room
11a input port
11b Airflow inlet
11c discharge pipe
12 rotor
12a disk
13 Electric motor for crushing
14 rotating shaft
15 Liner for crushing (crushing part)
16 Crushing blade (crushing part)
17 classification department
17a classification electric motor

Claims (2)

With the outer casing
The inner casing that forms the partitioned space inside the outer casing,
A crushing chamber provided below the inner casing and provided with a crushing portion having a crushing blade for crushing an object to be processed and a crushing liner, and a crushing chamber.
An airflow inlet that introduces airflow into the crushing chamber and
A blow-up passage formed between the inner casing and the outer casing and passing an object to be crushed and blown up in the crushing chamber,
A classification unit provided on the upper part of the inner casing and classifying the object to be processed, which is airflow-conveyed from the blow-up passage.
The inside of the blow-up passage is provided with an input port for inputting the object to be processed.
The inlet is opened in the outer casing above the crushing liner.
The object to be treated, which is charged from the charging port, is blown up toward the classification section in the blowing passage and classified at the classification section, and the object to be treated which is not sufficiently pulverized is passed through the internal casing from the classification section. A crushing device with a classification function, which is configured to return to the crushing part. With the outer casing
The inner casing that forms the partitioned space inside the outer casing,
A crushing chamber provided below the inner casing and provided with a crushing portion having a crushing blade for crushing an object to be processed and a crushing liner, and a crushing chamber.
An airflow inlet that introduces airflow into the crushing chamber and
A blow-up passage formed between the inner casing and the outer casing and passing an object to be crushed and blown up in the crushing chamber,
A classification unit provided on the upper part of the inner casing and classifying the object to be processed, which is airflow-conveyed from the blow-up passage.
A crushing device with a classification function is prepared , which is provided with a charging port for charging the object to be processed inside the blowing passage, and the charging port is opened in the outer casing above the crushing liner .
The object to be processed is put into the blow-up passage from the inlet,
The object to be processed, which is charged from the inlet, is first blown up toward the classification section in the blowing passage, introduced into the classification section, classified by the classification section, and passed through the object to be processed having a predetermined particle size. A coarse object to be processed, which is discharged from the discharge pipe provided in the inner casing and does not reach a predetermined particle size, is dropped into the crushing chamber by its own weight through the inner casing.
A method for crushing an object to be processed, which comprises blowing the object to be crushed in the crushing chamber again in the blowing passage and raising it to the classification portion.

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