JPH0215557Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a roll-type crusher that is capable of finely pulverizing grains and the like.

[Conventional technology]

Pulverizers that finely grind grains such as rice and wheat into flour include attrition type crushers such as disk grinders and disk cutter mills, impact type crushers such as pulverizers and turbo mills, and ball mills and rod mills. Fine grinders are known;
These pulverizers achieve fine pulverization by cutting and grinding the workpiece and pulverizing it in stages from large to small.

In addition, a typical roll-type crusher is one in which two cylindrical rolls of the same diameter that rotate at different circumferential speeds are arranged facing each other. The workpiece is passed through the rollers and pulverized by shearing and crushing, but the grinding ratio is small and it is not possible to finely grind the workpiece by passing it between the rolls once, so it is generally used as a coarse pulverizer or a medium pulverizer.

[Problem that the invention attempts to solve]

However, in the case of the above-mentioned grinding type grinder that performs fine grinding, the workpiece is ground repeatedly between a high-speed rotating disk and a fixed disk to finely grind the workpiece.
In addition, in the case of impact-type crushers, the workpiece is repeatedly collided with the workpiece between a high-speed rotating hammer and a fixed impact plate to pulverize it into fine powder, so the workpiece and medium are unnecessarily moved and agitated. This requires a large amount of power, and
Work efficiency was poor and high heat was generated, resulting in unnecessary damage or deterioration of the workpiece to be crushed.

In addition, in the case of the ball mill, etc., the workpiece is crushed by collision between balls, so
Since the power is transmitted to the rolling balls for pulverization, there is a large energy loss, and there is also a risk that the balls will wear out during pulverization and abrasion powder will be mixed into the workpiece as foreign matter.

Furthermore, pulverization using a roll-type pulverizer has extremely good pulverization efficiency when the pulverization ratio is small, but in order to finely pulverize the workpiece, two or more pairs of opposing cylindrical rolls are used to perform primary pulverization, Secondary pulverization... The method of finely pulverizing step by step and finally achieving fine pulverization is inefficient, and in this case, the workpiece that has undergone primary pulverization is transferred to secondary pulverization. Blocking (collective crushing) is likely to occur between the cylindrical rolls that perform subsequent crushing, and when blocking occurs, an extremely large force is required, and the workpiece that has been primarily crushed will be formed or crushed during the secondary crushing. It is granulated and re-solidified into flakes or granules, which is likely to cause blocking again during the next pulverization, resulting in poor pulverization efficiency.

The present invention was developed in view of the above points, and it eliminates damage to the workpiece, changes in quality due to heat, etc., prevents the occurrence of blocking, saves energy, and pulverizes the workpiece in one pass. The purpose is to provide a roll-type crusher that can achieve the following.

[Means for solving problems]

As a means to solve the above-mentioned problems, the present invention provides a roll-type crusher in which a workpiece fed from above is crushed between rolls that rotate and are arranged opposite each other, and a large-diameter main roll. , a small-diameter first sub-roll that is arranged opposite to the main roll and rotates at the same circumferential speed as the main roll; and a first sub-roll of a small diameter that is arranged below the first sub-roll and opposite to the main roll and rotates at the same circumferential speed as the main roll. and rotates in the same rotational direction as the first auxiliary roll and has a smaller diameter than the main roll,
and a second auxiliary roll having a larger diameter than the first auxiliary roll, and the first auxiliary roll and the second auxiliary roll are arranged on the same side of the main roll, which forms a downwardly rotating half-circumferential portion. At the same time, a water adding device is installed above the second auxiliary roll to perform shearing on the workpiece that has passed between the main roll and the first auxiliary roll and is primarily pulverized before being subjected to secondary pulverization. It is characterized by the fact that it has been established.

[Effect]

By configuring as described above, primary pulverization is performed between the main roll and the small-diameter first sub-roll. During this primary crushing, there is a difference in the roll diameter between the main roll and the first sub-roll;
Shear acts on the crushed surface of the raw material to help disperse the crushed materials and prevent collective crushing, and roll pressure is effectively transmitted to the crushed materials, resulting in efficient crushing. Dispersion is performed to prevent blocking during secondary grinding.

Before being subjected to secondary crushing, the primary crushed workpiece is sheared by a water adding device to increase its fluidity, and after the heat generated during primary crushing is cooled down, it is transferred between the main roll and the second auxiliary roll. Secondary pulverization. During this secondary crushing, shearing reduces the friction between the powders and prevents the generation of heat, and further prevents the occurrence of blocking, resulting in efficient crushing and the production of the workpiece. Fine comminution is achieved.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a roll-type pulverizer according to the present invention is applied to a roll-type pulverizer for finely pulverizing rice will be described below with reference to the drawings.

The crusher 1 includes a crushing chamber 4 surrounded by a frame cover 3 above a base 2a of a pedestal 2. Inside the crushing chamber 4, a large-diameter main roll 5 and a small-diameter first sub-roll 6 are formed. and a medium-diameter second secondary roll 7
The three rolls are attached to respective rotating shafts 5a and 6.
Both ends of the rolls a and 7a are supported by bearings 5b, 6b, and 7b, respectively, and are rotatably disposed, and in FIG. 2, a raw rice hopper 8a and a vibrating type A supply device 8, which includes a supply trough 8b and a controller (not shown) for adjusting the vibration intensity of the supply trough 8b, is supported and disposed on the base 2a of the pedestal 2, and is provided with a supply trough 8b. 8b can freely adjust the amount of raw rice supplied per unit time by adjusting the vibration intensity using the controller. Furthermore, a lower hopper 9 whose entire bottom surface is formed into a funnel shape is provided at the lower part of the grinding chamber 4.

In addition, the main roll 5, the first sub roll 6, the second
The auxiliary roll 7 has a roll diameter ratio of 16:9:12, and the first auxiliary roll 6 and the second auxiliary roll 7 are rotated clockwise in FIG. The rotating shaft 6a of the first auxiliary roll 6 is disposed on the right side, which is the part that rotates downward.
is located directly above the rotating shaft 5a of the main roll 5.
The rotating shaft 7a of the second auxiliary roll 7 is arranged at a position tilted 45 degrees to the right, and the rotating shaft 7a of the second auxiliary roll 7 is arranged at a position tilted 15 degrees downward from right beside the rotating shaft 5a of the main roll 5. has been done.

Further, the first auxiliary roll 6 and the second auxiliary roll 7 have a bearing 6b that supports the rotation shaft 6a of the first auxiliary roll 6, and a bearing 7b that supports the rotation shaft 7a of the second auxiliary roll 7. , are disposed so as to be movable in the direction of a bearing 5b that supports the rotating shaft 5a of the main roll 5. By adjusting the gap between the circumferential surface and the circumferential surface of the main roll 5, it is possible to adjust the pulverized particle size. Pressure springs 10a and 11a that cushion the impact by releasing foreign matter in the direction away from the main roll 5 when a foreign object is caught between the rolls 5.
are wound around both the gap adjustment bolts 10 and 11, respectively, and the pressure springs 10a and 11a act to keep the crushing pressure constant.

The main roll 5, the first sub-roll 6, and the second sub-roll 7 are each driven by two units installed on a bracket 12 provided on one side of the mount 2 (on the near side in FIG. 2). The main roll 5 is driven by a driven pulley 5c that is pivoted on the extending end of a rotating shaft 5a that extends outward (to the front in FIG. 2) from a bearing 5b; Driving pulley 1 attached to the output shaft of one motor 13
It is decelerated and driven to rotate clockwise via the V-belt 15 wound between the parts 3a and 3a. In addition, the second auxiliary roll 7
is a V wound around a driven pulley 7c that is pivoted on the extending end of the rotating shaft 7a extending outward from the bearing 7b, and a drive pulley 14a that is pivoted on the output shaft of the other motor 14. It is decelerated and driven to rotate counterclockwise via the belt 16. Further, the first auxiliary roll 6 includes a driven pulley 6c that is rotatably attached to an extending end of a rotating shaft 6a extending outward from a bearing 6a, and a second auxiliary roll 7.
The second sub roll 7 is rotatably driven to the left by a V-belt 17 wound between an indirect drive pulley 7d coaxially mounted with the driven pulley 7c, and the first sub roll 6 and the second sub roll 7 are The rotation speed of each of the two auxiliary rolls 7 is such that the circumferential speed of the roll surface of the main roll 5 and the circumferential speed of each roll surface of the first auxiliary roll 6 and the second auxiliary roll 7 are the same speed. It is set.

Moreover, the upper side ends of the main roll 5 and the first sub-roll 6, which are disposed opposite to each other in the grinding chamber 4, are provided with the raw rice from the supply trough 8b of the supply device 8. A weir plate 18 (the front side is not shown in FIG. 1) is provided to prevent overflow of raw rice, and similarly, on both upper sides of the main roll 5 and the second sub-roll 7, which are arranged opposite to each other, a weir plate 18 is provided. A weir plate 19 (the front side is not shown in FIG. 1) is provided to prevent overflow of raw rice that is primarily pulverized between the main roll 5 and the first sub-roll 6 and sent out.

Further, above the main roll 5 in the crushing chamber 4, a first shower pipe 20a of a water adding device 20 equipped with a water supply amount adjustment mechanism (not shown) is connected to the raw rice supplied from the supply trough 8b. The piping is installed in a position where water can be evenly added to the water, and diagonally above the second auxiliary roll 7 (diagonally above the right in FIG. 1), primary pulverized and sent out from between the main roll 5 and the first auxiliary roll 6 is provided. A second shower pipe 20b is installed at a position where it can evenly add water to the raw material rice.

In addition, 21, 22, 23 are scrapers, 24, 2
Reference numeral 5 indicates a lid for inspection/repair and cleaning that is openable and closable on the frame cover 3, and 26 and 27 are scraper operating cylinders.

Next, the operation of this embodiment configured as described above will be explained.

When starting the operation of the crusher 1, first prepare raw material rice soaked in water, and first turn on the motors 13 and 14.
After starting the main roll 5, first auxiliary roll 6, and second auxiliary roll 7, the raw rice is drained, or while being drained, the raw rice hopper 8a of the feeding device 8 is
The vibrating supply trough 8b is vibrated to start supplying raw rice. The first shower pipe 20a and the second shower pipe 2 of the water adding device 20
0b works in conjunction with the vibration motor of the vibrating supply trough 8b to eject water when feeding raw rice.

Raw rice, which is continuously supplied in a fixed quantity from the vibrating supply trough 8b, is sent to the upper part of the main roll 5 and the first sub-roll 6, which are partitioned at both ends by a weir plate 18, and is supplied with water by the first shower pipe 20a. After the fluidity has been increased by applying a first
It is taken in along with the water from the shower pipe 20a.

The raw rice taken into the gap between the main roll 5 and the first auxiliary roll 6 is crushed into coarse grains between the rolls, prevented from blocking by water, and finely crushed while being cooled for primary pulverization. be done. During this primary crushing, since there is a difference in roll diameter between the main roll 5 and the first auxiliary roll 6, a force in the shearing direction acts on the raw rice, and the crushed raw rice is crushed to be dispersed. This prevents the occurrence of blocking.

The raw rice that has been primarily pulverized and is sent downward from between the main roll 5 and the first auxiliary roll 6 is increased in fluidity again because the friction between the powder is reduced by the water jetted from the second shower pipe 20b. At the same time, the dry crushed surface of the raw rice produced during the primary crushing is wetted.

After the primary crushing, the second shower pipe 20b
The raw rice wetted with water from the water is sent to the upper part of the main roll 5 and the second sub-roll 7, which are partitioned at both ends by a weir plate 19, and the main roll 5 rotates at the same circumferential speed. The water from the second shower pipe 20b is taken into the gap between the second auxiliary roll 7 and the second auxiliary roll 7.

After the primary crushing, the main roll 5 and the second sub-roll 7
The raw rice taken into the gap with water is further crushed into fine particles while being cooled and prevented from blocking by the water. Therefore, it is efficiently crushed and secondary pulverized to a fine powder state, and flows down to the lower hopper 9 as an emulsion mixed with water.

As described above, the emulsion obtained by finely pulverizing raw rice through primary and secondary pulverization and mixing it with water is
Although not shown, a dehydration step is performed to obtain a cake-like rice flour product, or a drying step is further performed to obtain a finely powdered rice flour product.

As described above, the crusher 1 of this embodiment has a difference in roll diameter between the first auxiliary roll 6 and the second auxiliary roll 7 and the main roll 5, thereby preventing blocking during primary crushing and secondary crushing. In addition to effectively preventing the occurrence of the Since they are arranged so as to be inclined toward each other, the height and depth of the crusher 1 can be shortened, and the device can be made more compact.

In this embodiment, a roll-type pulverizer for pulverizing rice has been described, but it is also suitable for pulverizing other grains such as wheat, or for pulverizing various other solid materials. It can be implemented.

[Effect of idea]

As explained above, the roll-type crusher according to the present invention has a large-diameter main roll that rotates at the same circumferential speed, a small-diameter first sub-roll, and a smaller diameter than the main roll and a smaller diameter than the first sub-roll. a second sub-roll having a large diameter, the first sub-roll and the second sub-roll are respectively disposed on the same side that forms a downwardly rotating half circumferential portion of the main roll;
A water adding device that performs shearing on the primary pulverized workpiece before secondary pulverization is installed above the second sub-roll, so fine pulverization can be achieved with just one pass of the workpiece. In addition, there is no damage to the workpiece, there is no change in quality due to heat, and there are effects such as preventing the occurrence of blocking and saving energy.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a cross-sectional side view showing the main parts of a pulverizer, and FIG. 2 is a side view showing the entire pulverizer. 1...Crusher, 3...Frame cover, 4...
Grinding chamber, 5... Main roll, 5a... Rotating shaft, 6...
...First sub roll, 6a... Rotation shaft, 7... Second sub roll, 7a... Rotation shaft, 8... Supply device, 8a
... Raw rice hopper, 8b ... Supply trough, 13,
14...Motor, 18, 19...Weir plate, 20...
Water adding device, 20a...first shower pipe, 20
b...Second shower pipe.

Claims (1)

[Scope of utility model registration request] In a roll crusher, a workpiece supplied from above is clamped and crushed between rotating rolls arranged opposite to each other, and a large-diameter main roll is arranged opposite to the main roll and is identical to the main roll. a small-diameter first sub-roll that rotates at a circumferential speed; and a first sub-roll that is disposed below the first sub-roll and facing the main roll, and that rotates at the same circumferential speed as the main roll and in the same rotational direction as the first sub-roll. , a second sub roll having a smaller diameter than the main roll and a larger diameter than the first sub roll, the first sub roll and the second sub roll,
They are respectively disposed on the same side of the half-circumferential portion that rotates downwardly of the main roll, and are used for secondary pulverization of the workpiece that has passed between the main roll and the first sub-roll and has been primarily pulverized. A roll-type crusher characterized in that a water adding device that performs shearing is provided above the second auxiliary roll.