TWI681818B - Grinding type vertical grain polishing machine - Google Patents

Abstract

In a grinding type vertical grain polishing machine, a plurality of support columns and polishing chamber resistors disposed on each of these support columns are provided around the periphery of a ricebran metal gauze cylinder, wherein the polishing chamber resistors are in the shape of elongated plates which extend in the axial direction of the grinding type polishing roller, and are formed so as to bend in a hook shape in cross section, the base end in cross section is supported in a rotatable manner by the support columns, the leading end in cross section is in proximity to the outer peripheral surface of the grinding type polishing roller, and the curved part in cross section is configured to act so as to impart resistance by suppressing the movement of the moving grains.

Description

Grinding vertical grain mill

The invention relates to a grinding type vertical grain mill with a grinding type whitening roller shaft mounted on a vertical type main shaft.

The basic structure of the grinding vertical mill is to install the shaft of the grinding whitening roller as the whetstone into the vertical shaft of the bran removing metal mesh cylinder. In the whitening chamber, one end is connected to the grain supply part, and the other end is connected to the grain discharge part. Because of the strong whitening effect and the whitening room is vertical, it has the characteristics of easier handling of residual grains. On the other hand, because the whitening chamber is vertical, the natural fall of the grain is strong, and there are cases where it is discharged without sufficient grinding, or spots are generated during the whitening. To solve this, various efforts have been invested.

The grain mill of Patent Document 1 is provided with a resistance element that can provide resistance to the flow of rice grains in the whitening chamber. The front end of the resistance element, close to the outer peripheral surface of the grinding white roller, can provide resistance to the grains that move with the rotation of the grinding white roller to inhibit its movement; the front end can be whitened relative to the grinding white For the outer peripheral surface of the drum, adjust its far or near position in the radial direction of the grinding white roller.

Thereby, the grain is blocked by the resistance element and stays in the whitening chamber, during which it is subjected to the grinding action of the grinding-type whitening roller to perform the desired whitening action.

However, due to the adjustment method of the resistance element, the retention effect of the grain is not stable, and the rice bran located in the tendon groove on the back side of the grain has not been sufficiently removed. [Patent Literature]

Patent Literature 1: International Publication No. 2012/157402

In view of the above problems, the present invention aims to provide a milling-type vertical grain mill, which can stabilize the retention of grains and can almost completely remove the rice bran located in the tendon groove on the back side of the long grain rice grains .

In order to solve the above problem, the grinding type vertical grain mill of the present invention is to install the grinding type whitening drum shaft to the main shaft which is rotatably provided in the vertical bran removing metal mesh cylinder to be located on the bran removing metal mesh Between the drum and the grinding-type whitening roller is a whitening chamber as its main part, one end of which is connected to the grain supply part, and the other end of the whitening chamber is connected to the grain discharge part, characterized in that Around the mesh cylinder, there are a plurality of pillars, and white rolling chamber resistance bodies respectively arranged on each pillar; the white rolling chamber resistance bodies are elongated plate-shaped extending along the axial direction of the grinding white rolling drum And, the cross section is bent into a hook shape, the base end of the cross section is rotatably supported by the pillar, the front end of the cross section is close to the outer peripheral surface of the grinding white roller, and the curved section of the cross section It can provide resistance to the moving grain to inhibit its movement.

Furthermore, the resistance body of the white-rolling chamber is in the form of a long plate, and its cross-section is formed in a substantially L-shaped manner.

Furthermore, by the plurality of pillars and the plurality of white rolling chamber resistance bodies, the rolling chamber is divided in the circumferential direction into a plurality of tamping areas each having an independent tamping effect.

In addition, the grinding type vertical grain mill of the present invention is provided with a discharge port that opens a part of the bran-removing metal mesh cylinder at the other end of the whitening chamber and a discharge tank connected to the discharge port And a cover body for plugging the discharge port; in the cover body, there is no resistance device for imparting a biasing force to the cover body, but the discharge port is opened only by the outflow pressure of grain.

According to the present invention, a plurality of pillars are provided around the bran-removing metal mesh cylinder, and white rolling chamber resistance bodies respectively disposed on the pillars. The white rolling chamber resistance body extends on the axis of the grinding white rolling drum It has a long strip shape, and its cross section is formed into a curved hook shape. The base end of the cross section is rotatably supported by the pillar. The front end of the cross section is close to the grinding white The outer peripheral surface of the drum, in addition, because the curved part of the cross section can provide resistance to the moving grain to inhibit its movement, therefore, the grain can be easily captured at the curved part, and stable grain can be retained Function, and can fully remove the rice bran located in the tendon groove on the back side of the grain.

The white-rolling chamber resistance body is in the form of a long plate, and the cross-section is a generally L-shaped long plate-shaped plate. Therefore, compared with the conventional white-rolling chamber resistance body whose cross-section is linear, both It can reduce the occurrence rate of broken grains by about 2%, and can increase the whiteness. Furthermore, even in the case of low whiteness, the rice bran located in the tendon groove on the back side of the grain can be removed.

Furthermore, since the plural pillars and the plural milling chamber resistance bodies are divided into plural tamping areas in the circumferential direction in the milling chamber, each tamping area can have its own tamping effect. Do pounding.

In addition, the grinding type vertical grain mill of the present invention is provided with a discharge port that opens a part of the bran-removing metal mesh cylinder at the other end of the whitening chamber and a discharge tank connected to the discharge port , And a cover body for plugging the discharge port; in the cover body, there is no resistance device for imparting bias pressure to the cover body, but the discharge port is opened only by the outflow pressure of grains, Therefore, there is no need for a resistance device provided near the discharge port, which can reduce the manufacturing cost, and even when the rice grains flow out of the lid body under no-load conditions, they can be almost completely removed on the back side of the grain. Rice bran in tendons.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings. Fig. 1 is a schematic diagram of the overall structure of the grinding type vertical grain mill 1, Fig. 2 is a perspective view of the grinding type vertical grain mill 1 with a part disassembled, and Fig. 3 is a perspective view of the part of the white roller. Fig. 4 is a cross-sectional view of the grinding and milling portion, and Fig. 5 shows a cross-sectional view of the internal structure of the energizing device taken along line AA in Fig. 4.

The grinding type vertical grain mill 1 of this embodiment is formed at the approximate center of the base 2 of the main body, and the main shaft 3 is formed upright by the upper bearing portion 4 and the lower bearing portion 5, and a plurality of grinding white rollers 6 (hereinafter referred to as the white roller 6) is placed and fixed directly above the upper bearing portion 4 to form the main valley portion. The main shaft 3 is driven by a motor 8 fixed to a motor base 7 (the motor base 7 is attached to the main body base 2) through a motor pulley 9, a main shaft pulley 10, and a V-belt.

The white roller 6 is laminated by a plurality of whetstone discs 12 mounted on the main shaft 3 and spacers 13 inserted between the whetstone discs 12. The whetstone disc 12 is a device that fixes the cutting blade for grinding (grinding whetstones of the whetstone) on the entire circumferential surface by sintering or the like. The spacer 13 may be provided with a blow-off opening 13a for blowing from the layered multiple whetstone discs 12 toward the grinding cutting edge (refer to FIG. 4). By forming the blow-off opening 13a, The air taken from outside the machine is used for blowing air during bran removal, which can promote bran removal during pounding. At the upper end of the whitening roller 6, the feed roller 14 of the raw material is mounted on the spindle 3 by a shaft. A spiral blade 15 is provided on the outer peripheral surface of the feed roller 14, and the raw material can be fed by the rotation of the spiral blade 15.

Around the whitening drum 6, a bran-removing metal mesh cylinder 16 (Fig. 1) is erected at a predetermined interval. In addition, a whitening chamber 17 is formed between the bran removing metal mesh cylinder 16 and the whitening drum 6. In this embodiment, the bran-removing metal mesh cylinder 16 is divided into four quarters in the longitudinal direction, and the two side edges are fixed by four pillars 18 standing around the whitening drum 6. In addition, an arc-shaped bran removing chamber cover 19 is installed between the pillars 18 to form a bran removing chamber 20. The symbol 21 in FIG. 1 is a pillar cover.

The supply cylinder 22 for guiding the raw materials is placed and installed on the pillar 18. The supply cylinder 22 surrounds the feed drum 14, a funnel cylinder 23 is provided above the supply cylinder 22, and an opening of the inlet 24 is provided on the upper wall of the funnel cylinder 23. Inside the funnel tube 23, a hollow cone-shaped guide body 25, and a supply amount adjusting device 27 composed of two perforated rotating plates rotated by an adjusting rod 26 at the upper part thereof are provided.

At the lower end of the whitening chamber 17, a part of the bran removing metal mesh cylinder 16 is opened to form a discharge port 28, and a discharge tank 29 connected to the discharge port 28 is provided. In the discharge groove 29, a cover 31 operated by the weight bar 30 is provided. The configuration of this embodiment is to energize the cover 31 with the weight bar 30, but it is not limited to this. For example, a cylinder may be used instead of the weight rod 30 to energize the cover 31. In addition, the weight bar 30, the air cylinder, or the like may not be provided, and the rice may flow out of the cover 31 without a load.

In the white-rolling chamber 17, the white-rolling chamber resistance bodies 32 respectively disposed on the plural pillars 18 are provided in a protruding manner. In addition, the resistance body 32 of the whitening chamber extends in the shape of an elongated plate in the axial direction of the grinding whitening drum 6, and its cross section is formed by bending into a hook shape. In the white-rolling chamber resistance body 32 seen in FIGS. 3, 4, and 5, the cross-section is formed in a substantially L-shape. However, the white-rolling chamber resistance body 32 is not limited to an L-shape, as long as it is configured to be hook-shaped, for example, when viewed in cross section, it becomes "<shaped", "J-shaped", or "U-shaped" All shapes are available.

In the present embodiment, the resistance portion 32 of the whitening chamber formed in a substantially L-shaped cross section has a front end portion 33 close to the outer peripheral surface of the grinding whitening roller 6. At this time, the front end portion 33 is oriented toward the center direction of the whetstone disc 12 (the direction of the main axis 3), as shown in FIGS. 4 and 5. In addition, the function of the L-shaped curved portion 34 is to provide resistance to the grain moved by the rotation of the whitening drum 6 to suppress its movement. In addition, the base end portion 35 on the other end side of the front end portion 32 is rotatably supported by the longitudinal axis 36 built in the support column 18.

That is, the whitening chamber resistance body 32 includes an energizing device 37. The energizing device 37 is an actuator. As shown in FIGS. 4 and 5, it is composed of an air cylinder 38, a moving rod 39, and a pressure regulator 40. The mounting portion 41 at one end of the air cylinder 38 is mounted on the coupling block 42 on the side of the pressure regulating device 40 so as to be rotatable about the axis 43, and the other end is connected to the mill by means of the universal joint structure 44 rotating White room resistance body 32. One end of the white rolling resistance body 32 is rotatably supported by the longitudinal axis 36 built into the pillar 18, and is moved forward and backward by the moving rod 39, and can be rotated around the longitudinal axis 36 as the center For adjusting the proximity distance of the front end portion 33 to the outer peripheral surface of the grinding white roller 6.

In the cylinder 38, the air compressor 45 is connected to the manifold No1 through the regulator 46, and air pressure is supplied to the inside of the cylinder 38. The air pressure can be adjusted by the regulator 46. The regulator 46 is connected to the manifolds No1 to No4. In this embodiment, the cylinders 38 of the four energizing devices 37 are respectively piped. Therefore, in each of the whitening chamber resistance bodies 32, after receiving the air pressure, it can rotate around the longitudinal axis 36 as a center to suppress the movement of the grains.

In addition, below the bran removing chamber 20 of the grinding-type vertical grain mill 1, an annular bran collecting chamber 47 (see FIG. 1) is formed, and a wiper blade 48 that rotates integrally with the whitening drum 6 is provided. On the bottom surface of the bran collection chamber 47, a rice bran discharge port (not shown) is provided for discharging rice bran. In addition, a fan 49 for bran collection is installed at the lower part of the main shaft 3, and air can be sucked from the supply port in the upper part of the machine body through the bran removal chamber 20, and then discharged out of the machine together with the rice bran.

The operation of this embodiment will be specifically described below. The raw rice grains (generated rice) supplied to the inlet 24 (refer to FIG. 1) from the chute outside the figure are moderately regulated by the adjusting rod 26 to the supplied flow rate, and the guide body 25 is equally It is dispersed in the circumferential direction and supplied to the upper part of the whitening chamber 17. In the white rolling room 17, by the rotation of the white rolling drum 6 (direction of arrow R shown in FIG. 3), the rice grains frequently flow (revolution, rotation) under relatively low pressure, and the white rolling drum 6 The peripheral surface of the surface touches and the surface layer is polished.

At this time, the raw rice grains supplied to the white-rolling chamber 17 are moved toward the white-rolling drum 6 because the plurality of white-rolling chamber resistance bodies 32 arranged in the white-rolling chamber 17 are driven by the extension of the moving rod 39 of the cylinder 38 The lateral extension, so that the front end 33 of the white rolling chamber resistance body 32 is close to the outer circumferential surface of the white rolling drum 6, causing the grains moving with the white rolling drum 6 to be caught and moved to the white rolling chamber resistance body 32 The curved portion 34 side suppresses the movement of the grain. That is, in the circumferential direction inside the whitening chamber 17, the grain is provided with resistance to restrain its movement (see FIG. 5). In this embodiment, the front end 33 of the whitening chamber resistance body 32 is close to the outer peripheral surface of the whitening drum 6, and the curved portion 34 is used to catch the grains. Therefore, it has a stable retention effect of the grains and can fully Remove the rice bran in the tendon groove on the back side of the grain.

In this embodiment (refer to FIG. 4), four white rolling chamber resistance bodies 32 are provided in the circumferential direction in the white rolling chamber 17, so that each white rolling chamber resistance body 32 occurs as if there are plural white rolling chambers 17 ( The same effect at the time of the tamping area (ie, there are 4 white milling chambers in a grain mill (meaning multiple tamping areas separated by resistance bodies 32, 32 in the white milling chamber)) In other words, when the rice grains are captured by the whitening chamber resistance body 32, the whitening drum 6 rotates in the direction of rotation R to grind the surface layer of the rice grains, so it has an independent tamping effect in each tamping area As shown, since each tamping area has an independent tamping effect, there is no need for the weight bar 30 near the discharge port 28 of rice grains, which can reduce the manufacturing cost. Moreover, even if there is no load caused by the weight bar 30, When the rice grains flow out of the lid 31 under almost no load, the rice bran located in the tendon groove on the back side of the grains can still be removed sufficiently. Furthermore, in the embodiment of FIG. In the white room 17, four white rolling resistance bodies 32 are arranged in the circumferential direction, but it is not limited to this, and six or even ten white rolling resistance bodies 32 may be provided in the circumferential direction. In addition, the bran removing metal mesh cylinder 16 is not limited to being divided into 4, but can also be set to 6 or even 10 dividing numbers.

In addition, under other unspecified reasons, when the high pressure state such as crushing occurs in the whitening chamber 17, due to the pressing force of the grain, the moving rod 39 passes through the whitening chamber resistance body 32 Being crushed because of resistance to air pressure. As a result, the internal pressure of the cylinder 45 will increase, but this pressure change can be adjusted by the regulator 46, which can prevent the grain movement from being excessively suppressed.

Between the pounding action, the external air sucked from the funnel drum 23 by the bran collecting fan 49 passes through the whitening drum 6 and passes through the bran removing chamber 20, and is led to the lower side. The function can also promote the stirring of the rice grains, and can inhibit the excessive rise of the rice temperature.

[Example 1] The conventional grain milling machine (hereinafter referred to as "conventional machine model") disclosed in Patent Document 1 will be compared with the improved grain milling machine (hereinafter referred to as "improved machine model" contained in the embodiment of the present invention. ") Between the whiteness and the change of the grain. The whiteness is measured with a whiteness meter type C-600 manufactured by KETT Corporation. The test results are shown in Table 1, and the results are shown in Figure 6. 【Table 1】

From the results in Figure 6, it can be understood that comparing the improved model with the previous model can reduce the occurrence rate of broken particles by about 2% and improve the whiteness.

[Example 2] The ratio of whiteness and back tendon was compared between the conventional model and the improved model. The conditions are the same as in Table 1, and the results are shown in FIG. 7. According to the results shown in Fig. 7, comparing the improved model with the conventional model, the rice bran located in the tendon groove on the back side of the grain can be removed under the condition of low whiteness.

[Embodiment 3] The difference between the cumulative current and whiteness is compared between the conventional model and the improved model. The conditions are the same as in Table 1, and the results are shown in FIG. 8. According to the results shown in Fig. 8, compared with the conventional model, the improved model can reach the target whiteness when the current is reduced by about 26%.

According to the above, according to the present embodiment, a plurality of white rolling chamber resistance bodies 32 are arranged in the white rolling chamber 17, and each front end portion thereof is close to the outer circumferential surface of the white rolling drum, the cross section is bent into a hook shape, and extends in the white rolling chamber The axial direction of the drum, therefore, the grain can be captured by the curved part of the white body resistance body 32, which can have a stable grain retention effect, and can fully remove the ribbed groove located on the back side of the grain Rice bran.

In addition, compared with the conventional linear white-rolling chamber resistance body in which the cross-section is not curved, the occurrence rate of broken particles can be suppressed by about 2%, and the whiteness can be improved. Furthermore, even in the case of low whiteness, the rice bran located in the tendon groove on the back side of the grain can be removed, and the target whiteness can be reached while reducing the current by about 26%.

The invention can be applied to vertical or horizontal grain mills.

1‧‧‧grinding vertical mill 2‧‧‧Body base 3‧‧‧spindle 4‧‧‧Upper bearing 5‧‧‧Lower bearing 6‧‧‧ Grinding white roller 7‧‧‧Motor base 8‧‧‧Motor 9‧‧‧spindle pulley 11‧‧‧V belt 12‧‧‧stone 13‧‧‧ spacer 13a‧‧‧Blower 14‧‧‧Feeding roller 15‧‧‧Spiral fan blade 16‧‧‧Branch removal metal mesh cylinder 17‧‧‧Whiteroom 18‧‧‧pillar 19‧‧‧Branch removal cover 20‧‧‧Branch removal room 21‧‧‧pillar cover 22‧‧‧Supply tube 23‧‧‧Funnel tube 24‧‧‧ Input 25‧‧‧Guide 26‧‧‧Adjustment lever 27‧‧‧Supply adjustment device 28‧‧‧Export 29‧‧‧Discharge slot 30‧‧‧Hammer bar 31‧‧‧cover 32‧‧‧White body resistance body 33‧‧‧Front end 34‧‧‧Bend 35‧‧‧base end 36‧‧‧Vertical axis 37‧‧‧Energizing device 38‧‧‧Cylinder 39‧‧‧Moving rod 40‧‧‧pressure regulator 41‧‧‧Installation Department 42‧‧‧Combined block 43‧‧‧Axis 44‧‧‧Universal joint structure 45‧‧‧ cylinder 46‧‧‧ Regulator 47‧‧‧bran collection room 48‧‧‧Outer blade 49‧‧‧bran fan

Fig. 1 is a schematic cross-sectional view of the overall structure of a grinding-type vertical grain mill. Fig. 2 is a perspective view of a grinding type vertical grain mill with a part broken down. Fig. 3 is a perspective view of a portion of a white roller. Fig. 4 is a cross-sectional view of the grinding and milling portion. 5 is a cross-sectional view taken along line A-A in FIG. 4 showing the internal structure of the energizing device. Fig. 6 is a comparison chart of changes in whiteness and crushed grains of conventional models and improved models. Figure 7 is a comparison chart of the ratio of whiteness and back stiffness when the comparison conditions are the same as above. Figure 8 is a comparison chart of cumulative current and whiteness changes under the above comparison conditions.

3‧‧‧spindle

6‧‧‧ Grinding white roller

13‧‧‧ spacer

13a‧‧‧Blower

16‧‧‧Branch removal metal mesh cylinder

17‧‧‧Whiteroom

18‧‧‧pillar

19‧‧‧Branch removal cover

29‧‧‧Discharge slot

32‧‧‧White body resistance body

36‧‧‧Vertical axis

37‧‧‧Energizing device

38‧‧‧Cylinder

39‧‧‧Moving rod

40‧‧‧pressure regulator

Claims (4)

A grinding type vertical grain milling machine is to install a grinding type whitening drum shaft to a main shaft which is rotatably arranged in a vertical bran removing metal mesh cylinder. The bran removing metal mesh cylinder and the grinding white grinding drum One end of the whitening room as its main part is connected to the grain supply part, and the other end is connected to the grain discharge part; it is characterized in that a plurality of pillars and The white-rolling chamber resistance body disposed on the pillars; the white-rolling chamber resistance body is an elongated plate shape extending along the axial direction of the grinding white rolling drum, and its cross-section is curved to form a hook shape and a horizontal shape The base end of the cross section is supported by the pillar in a rotatable manner, the front end of the cross section is close to the outer peripheral surface of the grinding white roller, and the curved section of the cross section has resistance to the moving grain to suppress The role of its movement. For example, the grinding type vertical grain mill of claim 1, wherein the resistance body of the whitening chamber is in the form of a long plate, and the cross section is formed into a substantially L-shape. For example, the grinding vertical grinder of item 1 or 2 of the patent application scope, wherein, by the plurality of pillars and the plurality of white rolling chamber resistance bodies, the white grinding chamber is divided into a plurality of each in the circumferential direction Tampering area for independent tamping. For example, the grinding type vertical grain mill of claim 3, wherein the grain discharge part at the other end of the whitening chamber is provided with: a discharge port that opens a part of the bran removal metal mesh cylinder; and the A discharge groove connected to the discharge port; and a cover body for plugging the discharge port; in the cover body, there is no resistance device for imparting a biasing force to the cover body, but only using the outflow pressure of grain Open the discharge port.

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