JP3802951B2 - Crusher - Google Patents

Description

【００２４】
【発明の効果】
この発明は請求項１のように構成したことにより、粉砕メディアの粒径を小さくしても、攪拌アームの周速度を速くしても、粉砕室内において、処理物および粉砕メディアの粉砕容器の内壁面に沿って粉砕室の最底部から頂部に達する滑らかな流れが発生することになるので、処理物が粉砕室内の一部に滞留したり、付着するようなことはない。したがって、製品中に未処理のものが残ったり、製品の粒度のばらつきが大きくなったりするようなことはなく、一定の粒度の良質の製品を得ることができることになる。また、粉砕室内の一部に処理物が滞留したり、付着したりすることがないので、粉砕メディア及び処理物の投入量を粉砕室の６０％以上としても、オーバーロード等の機械的なトラブルが発生する虞はない。したがって、高い処理能力が得られることになる。
【００２５】
また、請求項２のように構成したことにより、駆動軸と粉砕容器との間をシールするシール部材に粉砕室内の粉砕メディアや処理物が作用することはなく、安定した性能を長期的に発揮することができることになる。
【００２６】
さらに、請求項３のように構成したことにより、粉砕室から処理物を排出する際に、粉砕メディアを粉砕室内に残し処理物のみを粉砕メディアから分離して排出することができることになり、処理物の回収作業が容易となる。
【００２７】
そして請求項４のように構成したことにより、粉砕室内の粉砕メディアおよび処理物を冷却又は加熱することができることになる。したがって、処理物および粉砕メディアの特性に応じた最適の条件で粉砕処理を行うことができることになり、効率の良い粉砕作業を行うことができることになる。
【図面の簡単な説明】
【図１】この発明による粉砕機の一実施の形態の全体を示した概略縦断面図である。
【符号の説明】
１……粉砕容器
２……上部容器
３……孔（駆動軸挿通用）
４……供給口（処理物及び粉砕メディア）
５……蓋
６……供給口（不活性ガス）
７……開閉弁
８、１７……フランジ
９、１８……空所
１０……下部容器
１１……排出口（処理物）
１２……内壁
１３……外壁
１４……ジャケット
１５……供給口（加熱媒体又は冷却媒体）
１６……排出口（加熱媒体又は冷却媒体）
１９……セパレータ
２０……押え板
２１……孔
２２……排出弁
２３……駆動軸
２４……攪拌アーム
２５……ボールガード
２６……粉砕室
２７……Ｏリング
２８……シール部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pulverizer, and more particularly to a batch-type media stirring pulverizer intended for use in a dry process.
[0002]
[Prior art and its problems]
In general, this type of media agitation type pulverizer is suitable for pulverization and dispersion of pigments and ceramics having poor fluidity, and includes a pulverization container having a cylindrical pulverization chamber therein, A drive shaft provided rotatably at the center and a stirring arm provided in a plurality of stages on a portion of the drive shaft located in the grinding chamber.
[0003]
Then, when a processed material and grinding media (steel balls, etc.) are put into the grinding chamber, the grinding chamber is sealed and the drive shaft is rotated, the stirring arm rotates together with the drive shaft. As the stirring arm rotates, the grinding media positioned around the stirring arm are forcibly moved in the vertical direction or circumferential direction, and a strong impact force or shearing force acts between the grinding media. The processed product located in is ground.
[0004]
As the grinding media, media having a size corresponding to the target product particle size are used, and the smaller the product particle size, the smaller the grinding media. In recent years, products in micron units have been required, and fine grinding media having a diameter of 5 mm or less are also used. The stirring arm is used at a peripheral speed of about 3 m / s. However, in recent years, it has a higher peripheral speed because of its special purpose for shortening the processing time or for high energy load processing. Often used.
[0005]
However, the smaller the grinding media, the easier it is for the processed material to stay or adhere to the corner between the bottom plate and the peripheral wall of the grinding chamber and the corner between the upper plate and the peripheral wall. The higher the peripheral speed of the stirring arm, the more remarkable it becomes. If the processed material stays or adheres to the portion, unprocessed products remain in the product after pulverization, or variation in the particle size of the product increases, so that a high-quality product cannot be obtained.
[0006]
Furthermore, in order to increase the processing capacity, if the input amount of grinding media and processed material is 60% or more of the grinding chamber, and operation is performed at high speed, abnormally large shaft power is generated, which may cause mechanical troubles such as overload. It becomes. Therefore, the input amount must be kept to 60% or less.
[0007]
The present invention solves the problems of the prior art as described above, and the processed product does not stay or adhere to the pulverization chamber, and a high-quality product can be obtained and the pulverization chamber can be obtained. An object of the present invention is to provide a pulverizer capable of obtaining a high processing capacity without causing a mechanical trouble such as overload even when the input amount of the pulverization medium and processed material is 60% or more. .
[0008]
[Means for solving problems]
In order to solve the above-mentioned problems, the present invention is a batch-type media agitation type pulverizer used in a dry process, and includes a bowl-shaped upper container provided with a hole for inserting a drive shaft and a supply port for a processed object. A pulverization container in which a spherical pulverization chamber is formed by connecting a bowl-shaped lower container providing a discharge port , and the pulverization container is rotatably provided, and one end portion passes through the hole and A means comprising a drive shaft located in the grinding chamber, a drive source for rotating the drive shaft, and a stirring arm provided in a portion of the drive shaft located in the grinding chamber is employed. In addition, a seal member is provided in a portion where the drive shaft penetrates the pulverization container, and the seal member is protected to a portion of the drive shaft located in the pulverization chamber and close to the inner wall surface of the pulverization container. A means provided with a ball guard is adopted. Furthermore, a means in which a separator is provided at the discharge port of the pulverization container is adopted. And the means which provided the jacket for heating or cooling in the said grinding | pulverization container is employ | adopted.
[0009]
[Action]
The present invention employs the above-described means, so that when the processed material and the grinding media are put into the grinding chamber and the stirring arm is rotated integrally with the drive shaft, the grinding media positioned around the stirring arm is forced. Are moved in the vertical direction or in the circumferential direction, and an impact force or a shearing force acts between the pulverizing media, and the processed material located between the pulverizing media is ground. In this case, since the pulverization chamber is formed in a spherical shape, a smooth flow is generated in the pulverization chamber from the bottom to the top of the pulverization chamber of the processed material and pulverization media along the inner wall surface of the pulverization container. This prevents the treated product from staying or adhering to a part of the grinding chamber.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described.
FIG. 1 is a schematic longitudinal sectional view of an embodiment of a pulverizer according to the present invention. The pulverizer includes a pulverization container 1 having a spherical pulverization chamber 26 therein, and a pulverization container 1. A drive shaft 23 that is rotatably inserted and a stirring arm 24 that is attached to a portion of the drive shaft 23 located in the crushing chamber 26 are provided.
[0011]
The crushing container 1 has a hemispherical space 9 inside, a bowl-shaped upper container 2 having an annular flange 8 projecting outwardly at the periphery of the opening, and a hemispherical space 18 inside. And a flange-shaped lower container 10 having an annular flange 17 projecting outward at the peripheral edge of the opening. The flanges 8 and 17 of both containers 2 and 10 are brought into close contact with each other, Are connected with bolts (not shown) to form a spherical crushing chamber 26 sealed inside. Reference numeral 27 denotes an O-ring for sealing between the flanges 8 and 17.
[0012]
A drive shaft insertion hole 3 penetrating the inside and outside of the upper container 2 is formed at the top of the upper container 2, and the drive shaft 23 is rotatably inserted into the hole 3 through a seal member 28. It has become. In the vicinity of the hole 3 for inserting the drive shaft, a supply port 4 for processed material and grinding media (steel balls, etc.) penetrating the inside and outside of the upper container 2 and a supply port 6 for inert gas are formed. . A lid 5 is provided at the opening of the supply port 4 for the processed material and the pulverized media, and the opening of the supply port 4 is opened and closed by the lid 5. An opening / closing valve 7 is provided in the inert gas supply port 6, and the supply port 6 is opened / closed by the opening / closing valve 7.
[0013]
In the vicinity of the top of the lower container 10, a discharge port 11 for the processed material penetrating the inside and the outside of the lower container 10 is formed. And a separator 19 for discharging only the processed material to the outside of the crushing chamber 26 is mounted. A presser plate 20 having a hole 21 at the center is mounted outside the separator 19 of the discharge port 11, and the separator 19 is fixed inside the discharge port 11 by the presser plate 20. A discharge valve 22 is provided outside the presser plate 20, and the discharge port 11 is opened and closed by the discharge valve 22.
[0014]
The lower container 10 has a double wall structure including an inner wall 12 and an outer wall 13, and a jacket 14 for circulating a heating medium or a cooling medium is provided between the inner wall 12 and the outer wall 13. . A heating medium or cooling medium supply port 15 penetrating the inside and outside of the jacket 14 is provided at the top of the lower container 10, and a heating medium or cooling medium penetrating the inside and outside of the jacket 14 is provided near the flange 17 of the lower container 10. The discharge port 16 is provided, and a heating medium or a cooling medium is supplied or discharged from the supply source (not shown) into the jacket 14 through the supply port 15 and the discharge port 16.
[0015]
The drive shaft 23 has a rod shape, and one end is located in the crushing chamber 26 and the other end is located outside the crushing chamber 26. A bar-like stirring arm 24 is attached to a portion of the drive shaft 23 located in the crushing chamber 26 so as to protrude in a plurality of stages in the vertical direction (four stages in this embodiment) in the horizontal direction. A drive source (not shown) is connected to the other end of the drive shaft 23 via a transmission member (not shown), and the drive shaft 23 and the stirring arm 24 are rotationally driven by the drive source. A disk-shaped ball guard 25 is provided in a portion of the drive shaft 23 close to the inner wall surface of the upper container 2, and the ball guard 25 prevents the processed material and the grinding media from acting on the seal member 28. It has become.
[0016]
Next, the operation of the above will be described.
First, the processed material and the pulverization medium are charged into the pulverization chamber 26 from the supply port 4, the supply port 4 is closed with the lid 5 to seal the interior of the pulverization chamber 26, and the drive shaft 23 is driven by a drive source (not shown). When the stirring arm 24 is rotated, the grinding media positioned around the stirring arm 24 are moved in the vertical direction or the circumferential direction along with the rotation of the stirring arm 24, and strong impact force or shearing force is generated between the grinding media. Works, and the processed material located between the grinding media is ground.
[0017]
In this case, since the pulverization chamber 26 is formed in a spherical shape, a smooth flow of the processed material and the pulverization media that reaches the top from the bottom of the pulverization chamber 26 along the inner wall surface of the pulverization container 1 is generated in the pulverization chamber 26. This flow prevents the treated product from staying or adhering to a part of the crushing chamber 26.
[0018]
Then, the processed product pulverized to a predetermined particle size is separated from the pulverized media by the separator 19 of the discharge port 11, the pulverized media is left in the pulverization chamber 26, and only the processed product is discharged from the discharge port 11 through the discharge valve 22. It is discharged outside.
[0019]
In the pulverizer according to this embodiment configured as described above, since the pulverization chamber 26 is formed in a spherical shape, the peripheral speed of the stirring arm 24 is increased even if the particle size of the pulverization media is reduced. However, the processed product does not stay or adhere to a part of the crushing chamber 26. That is, in the pulverization chamber 26, a smooth flow is generated from the bottom to the top of the pulverization chamber 26 along the inner wall surface of the pulverization container 1 for processed material and pulverization media. It does not stay or adhere to a part of the inside. Accordingly, the processed product is circulated and ground uniformly in the pulverization chamber 26 and pulverized to a predetermined particle size, so that unprocessed products remain in the product or the variation in product particle size increases. There is no such thing, and a good quality product with a certain particle size is obtained.
[0020]
Further, since the processed material does not stay or adhere to a part of the pulverizing chamber 26, even if the input amount of the pulverizing media and processed material is 60% or more of the pulverizing chamber 26, a machine such as overloading is used. No trouble will occur. Therefore, high processing capability can be obtained.
[0021]
In the above description, the spherical pulverization chamber 26 is formed by the hemispherical space 9 of the upper container 2 and the hemispherical space 18 of the lower container 10, but the pulverization chamber 26 is completely spherical. However, a cylindrical straight body portion may be provided between the hemispherical space 9 and the hemispherical space 18. In this case, the straight body portion may be formed by a part of the upper container 2 and the lower container 10, and in addition to the two containers 2 and 10, another container, for example, an annular container is used to form the straight body portion. It may be formed. Furthermore, the semispherical cavities 9 and 18 of the upper container 2 and the lower container 10 may be semi-elliptical, and in this case, a cylindrical straight body is provided between the semi-elliptical cavities. It may be provided. In short, the ratio of the height from the top to the bottom of the grinding chamber 26 and the diameter may be 1.5 or less.
[0022]
Hereinafter, in Table 1, one example of a pulverizer according to this embodiment is compared with a comparative example. As can be seen from Table 1, in this embodiment, even if the particle size of the grinding media is reduced or the peripheral speed of the stirring arm is increased, the processed material stays and adheres in the grinding chamber. In other words, it can be pulverized into a product having a target particle size in a shorter processing time than the comparative example, and it can be clearly seen that high processing ability is exhibited.
[0023]
[Table 1]

[0024]
【The invention's effect】
According to the present invention configured as in claim 1, even if the particle size of the grinding media is reduced or the peripheral speed of the stirring arm is increased, the inside of the grinding container for the processed material and the grinding media in the grinding chamber. A smooth flow from the bottom of the crushing chamber to the top of the crushing chamber is generated along the wall surface, so that the processed product does not stay or adhere to a part of the crushing chamber. Therefore, no unprocessed product remains in the product or the variation in the product particle size does not increase, and a high-quality product with a certain particle size can be obtained. In addition, since the processed material does not stay or adhere to a part of the pulverization chamber, mechanical troubles such as overloading may occur even if the input amount of the pulverization media and processed material is 60% or more of the pulverization chamber. There is no risk of occurrence. Therefore, high processing capability can be obtained.
[0025]
In addition, by configuring as in claim 2, the pulverization media and the processed material in the pulverization chamber do not act on the seal member that seals between the drive shaft and the pulverization container, and exhibits stable performance over a long period of time. Will be able to.
[0026]
Furthermore, by configuring as in claim 3, when discharging the processed material from the pulverization chamber, only the processed material can be separated and discharged from the pulverizing medium, leaving the pulverizing medium in the pulverizing chamber. Collecting work becomes easy.
[0027]
According to the fourth aspect of the present invention, the pulverization media and the processed material in the pulverization chamber can be cooled or heated. Therefore, the pulverization process can be performed under optimum conditions according to the characteristics of the processed material and the pulverization medium, and an efficient pulverization operation can be performed.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view showing an entire embodiment of a pulverizer according to the present invention.
[Explanation of symbols]
1 …… Crushing container 2 …… Upper container 3 …… Hole (for drive shaft insertion)
4. Supply port (processed material and grinding media)
5 ... Cover 6 ... Supply port (inert gas)
7: Open / close valve 8, 17 ... Flange 9, 18 ... Empty space 10 ... Lower container 11 ... Discharge port (processed material)
12 …… Inner wall 13 …… Outer wall 14 …… Jacket 15 …… Supply port (heating medium or cooling medium)
16 …… Discharge port (heating medium or cooling medium)
19 …… Separator 20 …… Presser plate 21 …… Hole 22 …… Discharge valve 23 …… Drive shaft 24 …… Agitating arm 25 …… Ball guard 26 …… Crushing chamber 27 …… O-ring 28 …… Seal member

Claims (4)

A batch-type media agitation mill used in a dry process,
A pulverization container in which a spherical pulverization chamber is formed by connecting a bowl-shaped upper container providing a drive shaft insertion hole and a treated product supply port and a bowl-shaped lower container providing a treated product discharge port A drive shaft that is rotatably provided in the pulverization container and has one end passing through the hole and positioned in the pulverization chamber, a drive source that rotates the drive shaft, and a pulverization chamber in the drive shaft. A pulverizer characterized by comprising a stirring arm provided at a position.   A ball that protects the seal member on a portion of the drive shaft that is located in the pulverization chamber and that is close to the inner wall surface of the pulverization vessel. The crusher of Claim 1 which provided the guard.   The pulverizer according to claim 1, wherein a separator is provided at an outlet of the pulverization container.   The pulverizer according to claim 1, wherein a jacket for heating or cooling is provided in the pulverization container.

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