JP5600547B2 - Roll mill - Google Patents

Description

The present invention relates to a roll mill capable of pulverizing a solid material.

As this type of roll mill, for example, the technique shown in FIG. 4 is already known. In this technique, the three rolls 160 slide outward with respect to the base 152 due to the centrifugal force accompanying the rotation of the base 152, so that the surface of each roll 160 that slides outward and the fixing plate on the inner surface of the casing 120. The solid material can be pulverized in the gap between the two. Thereby, when the load at the time of grinding | pulverization becomes large, each roll 160 will return to the inner side of the base 152 (slide), Therefore The forced grinding | pulverization of a solid material can be prevented. Therefore, even when a solid material having a large shape is pulverized, it can be finely pulverized without impairing the characteristics of the solid material.

  As prior art document information related to the invention of this application, for example, Patent Document 1 is known.

International Publication No. 2006/001126

However, in the above-described conventional technology, the support shaft 162 that supports the roll 160 has a structure in which one end (the upper end in FIG. 4) forms a free end. That is, the roll 160 has a structure in which the support shaft 162 is cantilevered by the base 152. Accordingly, when a centrifugal force acts on the support shaft 162 as the base 152 rotates, the support shaft 162 is bent so that the free end side faces outward. Therefore, even when the load at the time of pulverization increases, the roll 160 may return poorly when returning to the inside of the base 152 (it may be difficult to return). In some cases, rough pulverization impairs the properties of the material.

The present invention is intended to solve such problems, and the problem is that a roll mill that can improve the degree of return when the roll returns to the inside of the base when the load during crushing increases. Is to provide.

The present invention is for achieving the above object, and is configured as follows. The invention according to claim 1 is a casing, a base provided inside the casing and rotatable around an axial axis of the casing, and between the center side and the outside with respect to the base. slidably supported roles, has a, by a centrifugal force accompanying the rotation of the base, roll by sliding outwardly against the long hole formed in the base, the roll slid outwardly A roll mill capable of pulverizing a solid material in a gap between a surface and an inner surface of a casing, wherein the base is composed of two panel members arranged to face each other, and the support shaft of the roll has both panel members. The long hole has a predetermined angle between a line connecting both ends in the longitudinal direction and a line connecting the outer side end of the both ends and the center of the base. I'll do it Together are formed on its longitudinal axis is configured, characterized in that it is formed so as to form the R-shaped.
According to this configuration, if the load when the solid material is being pulverized becomes large, the roll returns (slides) to the inside of the base as in the conventional roll mill, so that the solid material can be forcibly pulverized. Therefore, even when a solid material having a large shape is pulverized, it can be finely pulverized without impairing the characteristics of the solid material. In addition, the support shaft which supports a roll has a structure where both ends are supported by the base unlike the roll mill of a prior art. Thereby, even if a centrifugal force acts on the support shaft as the base rotates, the support shaft does not bend. Therefore, the degree of return when the roll returns to the inside of the base can be improved.

The invention according to claim 2 is the roll mill according to claim 1, wherein the panel member is formed with a through hole so as to penetrate the thickness direction thereof. . According to this configuration, the pulverized solid material (powder) can be sent to the downstream process not only from the edge of the panel member but also from this through hole. Therefore, many powders can be sent to the downstream process.

FIG. 1 is a longitudinal sectional view of a roll mill according to an embodiment of the present invention. FIG. 2 is a plan view of an upper rotating disk in the roll mill of FIG. FIG. 3 is a diagram illustrating the operation state of FIG. FIG. 4 is a longitudinal sectional view of a roll mill according to the prior art.

Hereinafter, the form for implementing this invention is demonstrated using FIGS. 1-3. First, with reference to FIGS. 1-2, the whole structure of the roll mill 1 which concerns on the Example of this invention is demonstrated. The roll mill 1 mainly includes a frame portion 2, a drive portion 3, a pulverizing portion 4, and a classification portion 5. Below, these frame part 2, drive part 3, crushing part 4, and classification part 5 are explained individually.

First, the frame part 2 will be described. The frame portion 2 includes a gantry 10 installed on the floor floor F, a lower casing 20 assembled to the gantry 10, and an upper casing 22 assembled to the lower casing 20. The lower casing 20 is formed with an air intake port 20a capable of taking in air on its side surface. In addition, a fixing plate 24 is assembled to the lower casing 20 at a position facing the outer peripheral surface of a roll 60 described later on the inner peripheral surface thereof.

On the other hand, the upper casing 22 is formed with a material input port 22a through which a solid material can be input and a powder discharge port 22b through which the powder classified by the classification unit 5 described later can be discharged. A fan (not shown) capable of discharging powder from the powder discharge port 22b is provided on the downstream side of the powder discharge port 22b. A cooling jacket (not shown) that can circulate cooling water is provided on the outer surfaces of the upper and lower casings 20 and 22. Thereby, the heat_generation | fever when grind | pulverizing a solid material can be suppressed. The frame unit 2 is configured in this way.

Next, the drive unit 3 will be described. The drive unit 3 includes a motor 30 assembled to the gantry 10 and a main shaft 40 assembled to the inside of the lower casing 20 via a bearing 42 so as to be rotatable about a vertical axis. A V-belt 36 is stretched between a small pulley 34 fixed to the rotating shaft 32 of the motor 30 and a large pulley 44 fixed to the main shaft 40. Thereby, when the motor 30 is driven, the main shaft 40 can be rotated. The drive unit 3 is configured in this way.

Next, the pulverizing unit 4 will be described. The pulverizing section 4 includes a lower rotating disk 50 assembled at a substantially central position in the longitudinal direction of the main shaft 40, an upper rotating disk 52 assembled at the tip of the main shaft 40 so as to face the lower rotating disk 50, and both It comprises three rolls 60, 60, 60 assembled via three support shafts 62, 62, 62 so as to bridge the rotary disks 50, 52. The two rotating disks 50 and 52 correspond to “two panel members” recited in the claims.

Here, the assembly structure of the roll 60 will be described in detail. A support shaft 62 is inserted into the roll 60 through a bearing 64 in a through hole (not shown) formed in the axial direction. Thereby, the roll 60 can be rotated with respect to the support shaft 62. The both ends of the support shaft 62 are inserted into long holes 50a and 52a described later formed in the rotary disks 50 and 52, respectively.

This description corresponds to “the roll has a structure in which the support shaft is supported by both panel members” described in the claims. Stoppers 66 and 66 are assembled to both ends of the inserted support shaft 62. Thereby, it can prevent that the support shaft 62 falls out from both the long holes 50a and 52a. The roll 60 is assembled in this way.

The support shaft 62 is formed so that its planar shape is substantially rectangular. Thereby, when both ends of the support shaft 62 are inserted into the long holes 50a and 52a, the inserted support shaft 62 can be prevented from rotating in the long holes 50a and 52a.

Further, a concave 60a groove is formed on the outer peripheral surface of the roll 60 along the longitudinal direction thereof. As a result, when the solid material is pulverized, the solid material is caught in the groove 60a, so that a sufficient compressive force, tearing shear force, and friction force can be applied to the solid material. The groove 60 a is formed to be inclined with respect to the longitudinal direction of the roll 60. Thereby, sufficient compression force, tearing shearing force, and frictional force can be further applied to the solid material.

On the other hand, as described above, the long holes 50a and 52a into which both ends of the support shaft 62 can be inserted are formed in both the rotating disks 50 and 52. As is apparent from FIG. 2, the two long holes 50 a and 52 a are formed at three locations so as to be even in the circumferential direction of the two rotating disks 50 and 52.

The long holes 50a and 52a are formed by connecting a line A connecting both ends in the longitudinal direction (an end on the outer side and an end on the inner side), the end on the outer side, and the centers of the rotary disks 50 and 52. The connecting line B is formed so as to form a predetermined angle “θ”. Further, both the long holes 50a and 52a are formed such that the longitudinal axis thereof forms an R shape (substantially arc shape).

Accordingly, when centrifugal force acts on the roll 60, the roll 60 can be smoothly slid outward with respect to the rotating disks 50 and 52. The upper rotating disk 52 is formed with through holes 52b, 52b, 52b so as to penetrate the thickness direction thereof. Thereby, since the pulverized solid material (powder) can be sent not only from the edge of the upper rotating disk 52 but also from the through holes 52b to the classifying unit 5 described later, many powders are classified. Can be sent to. The crushing unit 4 is configured in this way.

The through holes 52b, 52b, 52b are formed closer to the center of the upper rotating disk 52 (see FIG. 2). As a result, among the pulverized solid material (powder), the fine particle powder drifts toward the center (inner side) of the pulverization unit 4, and thus can be quickly discharged to the classification unit 5 described later. it can. Therefore, excessive pulverization of the solid material can be suppressed. On the other hand, of the pulverized solid material (powder), the powder of coarse particles drifts to the outside of the pulverization unit 4 due to the centrifugal force, and is therefore rebounded by the upper rotating disk 52 and rolls 60, 60, 60. Will be reground.

Next, the classification unit 5 will be described. The classification unit 5 includes a classification motor 70 assembled to the upper casing 22 and a classification blade 74 assembled to the tip of the rotary shaft 72 of the classification motor 70. The classification blade 74 is formed with through holes 74a and 74a through which only a powder having a predetermined size or less among the solid material (powder) pulverized by the pulverizing unit 4 can be passed. Thereby, classification (selection) can be performed so that the pulverized solid material (powder) has a predetermined size or less. The predetermined size is a design matter determined by the desired powder size. The classification unit 5 is configured in this way.

The roll mill 1 includes these frame part 2, drive part 3, pulverizing part 4, and classifying part 5.

Then, with reference to FIGS. 2-3, operation | movement of the roll mill 1 which consists of the structure mentioned above is demonstrated. First, from the state shown in FIG. 2, the operation of driving the motor 30, the classification motor 70, and the fan is performed. Then, as already described, since the main shaft 40 rotates, both the rotating disks 50 and 52 start to rotate as the main shaft 40 rotates.

Due to the centrifugal force acting on each support shaft 62 together with each roll 60 in accordance with this rotation, the three support shafts 62 together with the respective rolls 60 inside the elongated holes 50a, 52a of both rotary disks 50, 52 from the center side outward. (See FIG. 3). At this time, each roll 60 also rotates with respect to each support shaft 62. That is, each roll 60 is configured to perform not only revolution but also rotation.

Next, an operation of charging the solid material to be pulverized from the material input port 22a is performed. Then, the charged solid material enters between the outer peripheral surface of each roll 60 and the fixed plate 24 by the rotational force of both rotary disks 50 and 52 and each roll 60. The solid material that has entered is crushed and simultaneously pulverized by shearing and frictional force. At this time, as already described, since the groove 60a of the roll 60 is inclined with respect to the longitudinal direction of the roll 60, a sufficient compressive force, tearing shear force, and friction force are further applied to the solid material. be able to. Therefore, the solid material can be more finely pulverized.

The crushed solid material (powder) is classified into a predetermined size by the classification blade 74, and only the classified powder is discharged from the powder discharge port 22b. On the other hand, the unclassified powder is again pulverized by the pulverizing unit 4 and repeated until it is classified to a predetermined size.

The roll mill 1 according to the embodiment of the present invention is configured as described above. According to this configuration, when the load when the solid material is being crushed becomes large, each roll 60 returns (slides) to the inside of the rotating disks 50 and 52 as in the roll mill 101 of the prior art. The forced crushing of the material can be prevented. Therefore, even when a solid material having a large shape is pulverized, it can be finely pulverized without impairing the characteristics of the solid material. The support shaft 62 that supports the roll 60 has a structure in which both ends (upper and lower ends in FIG. 1) are supported (restricted) by the long holes 50a and 52a, unlike the roll mill 101 of the prior art. That is, the roll 60 has a structure in which the support shaft 62 is supported by both rotating disks 50 and 52. As a result, even if a centrifugal force acts on the support shaft 62 as the rotating disks 50 and 52 rotate, the support shaft 62 does not bend. Therefore, it is possible to improve the degree of return when the roll 60 returns to the inside of the two rotary disks 50 and 52. If the degree of return can be improved in this way, even when a solid material having a large shape is pulverized, it can be reliably pulverized without damaging the characteristics of the solid material.

Further, according to this configuration, the upper rotating disk 52 is formed with through holes 52b, 52b, 52b. Therefore, the pulverized solid material (powder) can be sent not only from the edge of the upper rotating disk 52 but also from the through holes 52b to the classifying unit 5 described later. Therefore, many powders can be sent to the classification unit 5.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, the configuration in which the pulverizing unit 4 is provided with the three rolls 60, 60, 60 so as to be uniform in the circumferential direction has been described. However, the present invention is not limited to this, and the number of rolls 60 may be any number. However, in consideration of balance, vibration, noise, and the like, 3, 5, 9, etc. (a number that is a multiple of 3 and not a multiple of 2, exceptionally including 5) are preferable.

1 Roll mill 20 Lower casing (casing)
50 Lower rotating disk (base)
52 Upper rotating disk (base)
60 Roll 62 Support shaft

Claims (2)

A casing,
A base provided inside the casing and rotatable around an axial axis of the casing;
A roll that is slidably supported between the center side and the outside of the base;
By centrifugal force caused by the rotation of the base, roll by sliding outwardly against the long hole formed in the base, grinding the solid material in the gap between the surface and the inner surface of the casing of the roll slid outwardly A possible roll mill,
The base is composed of two panel members arranged opposite to each other,
The roll has a structure in which the support shaft is supported by both panel members ,
The long hole is formed such that a line connecting both ends in the longitudinal direction and a line connecting the outer end of the both ends and the center of the base form a predetermined angle. A roll mill characterized in that the direction axis is formed in an R shape . The roll mill according to claim 1,
A roll mill characterized in that a through hole is formed in the panel member so as to penetrate the thickness direction thereof.

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