Shelling and impurity removal separation type rice milling device

Abstract

The utility model provides a hulling and impurity removing separation type rice milling device, and relates to the technical field of rice milling equipment. The rice husking device comprises a rice husking roller, a shell and a transmission shaft capable of driving the rice husking roller to rotate and penetrating through the shell. The rice milling roller comprises an impurity removing section and a rice milling section, an impurity removing space is reserved between the impurity removing section and the shell, the rice milling roller is provided with a containing groove penetrating through the impurity removing section and the rice milling section, the inner wall of the containing groove is spiral in the length direction of the rice milling roller, and a slag discharging opening is formed in the position, at the tail end of the impurity removing section, of the shell. The sectional area of the containing groove located in the impurity removing section is larger than that of the containing groove located in the rice milling section. Gravel is separated from rice in the rotating process, enters the impurity removal space and then is pulverized by the impurity removal section and the shell of the rice milling roller, and the pulverized gravel and gravel with the size not enough to be pulverized are blocked in the impurity removal space by the spiral retaining wall and leave the interior of the rice milling device through the slag discharging opening. The gravel and the rice husks are separated and collected respectively, and pollution of the crushed gravel to the collected rice husks is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of rice milling equipment, and more specifically, to a rice milling device for hulling, impurity removal and separation. Background Art

[0002] During the rice milling process, rice is fed into the rice mill and squeezed and ground by rice rollers to separate the rice husks from the rice grains. However, rice husks are not the only foreign matter in the rice milling process. In order to evaporate the moisture in the rice, reduce the humidity of the rice to prevent mildew and germination, and extend the storage period of the rice, the rice needs to be air-dried after harvesting. During the air-dried process, the rice also needs to be turned over regularly, which will cause a large amount of sand and gravel to be mixed in the rice after drying. The existing rice milling machine / hulling machine takes into account the removal of sand and gravel during the hulling process, and removes them through the screening process before hulling or screening them together with the rice husks, such as:

[0003] 1. Chinese utility model patent publication number CN220143470U discloses a rice milling machine with a bran screening device, comprising a base plate and a rice milling machine body, the rice milling machine body being fixedly mounted on one side of the top of the base plate, a control module being fixedly mounted on the other side of the top of the base plate, a fixed platform being fixedly mounted on one side of the top of the base plate, and a bran screening mechanism being mounted on the top of the base plate; the bran screening mechanism comprising a motor, a turntable, a connecting plate, a second screen, a first screen, a fixed plate, a guide rod, a movable plate and a movable block, the motor being fixedly mounted on the top of the fixed platform, and the output shaft of the motor being fixedly connected to the middle part of the bottom of the turntable. The rice milling machine with a bran screening device enables the first screen and the second screen to reciprocate to screen the white rice discharged from the discharge port of the rice milling machine body twice, thereby removing impurities such as grains, large rice husks, coarse debris and stones in the white rice, thereby improving the purity of the rice after the rice milling machine is mortared, that is, the grains, rice husks and stones are removed at the same time.

[0004] 2. Chinese utility model patent publication number CN219400271U discloses a rice milling device, belonging to the field of rice processing technology. The device comprises a device housing, a feed hopper disposed on the device housing, a dehumidification pipe and two rice milling rollers disposed within the device housing; a first guide plate disposed between the dehumidification pipe and the feed hopper; two rice milling rollers disposed below the dehumidification pipe, with a first screening plate disposed between the two rice milling rollers and the dehumidification pipe; a rice collection box disposed at the bottom of the device housing, with a second screening plate disposed between the rice collection box and the two rice milling rollers; and a vibration assembly disposed within the device housing, connected to the first screening plate and the second screening plate, respectively. In this application, the rice is screened by the first screening plate before milling to separate the rice and foreign matter such as pebbles, thereby preventing foreign matter such as pebbles from damaging the rice milling rollers. That is, the rice passes through the screening plate before milling.

[0005] Rice husks are a byproduct of rice processing and offer a variety of potential uses. For example, they can be used to make environmentally friendly rice husk boards or cutting boards, as animal feed, as a cultivation medium for edible fungi such as mushrooms, in the manufacture of environmentally friendly packaging materials, and in the production of biodegradable plastics as an alternative to traditional plastics. Therefore, separating the husks from the sand and gravel simultaneously contaminates the husks, making their secondary use more difficult. Screening before hulling also presents the problem of irregular sand and gravel clogging the screen, rapidly reducing screening efficiency. Utility Model Content

[0006] In order to solve the problems existing in the existing rice milling equipment, the technical solution adopted in this application is a rice milling device with hulling and impurity removal, which includes a rice milling roller, a shell, and a transmission shaft that can drive the rice milling roller to rotate and passes through the shell;

[0007] The rice milling roller includes a dust removal section and a rice milling section, with a dust removal space left between the dust removal section and the outer shell. The rice milling roller is provided with a receiving groove which passes through the dust removal section and the rice milling section. The inner wall of the receiving groove is spiral along the length direction of the rice milling roller. The inner wall of the outer shell is provided with a circumferential retaining wall between the dust removal section and the rice milling section. The dust removal section is provided with a spiral retaining wall in the dust removal space. The outer shell is provided with a slag discharge port at the end of the dust removal section. The cross-sectional area of ​​the receiving groove located in the dust removal section is larger than the cross-sectional area of ​​the receiving groove located in the rice milling section.

[0008] Optionally, the cross-sectional area of ​​the accommodating groove gradually decreases from the end away from the rice milling section to the end away from the impurity removal section.

[0009] Optionally, the opening angle of the accommodating groove in the impurity removal section is greater than the opening angle of the accommodating groove in the rice milling section.

[0010] Optionally, the depth of the accommodating tank located in the impurity removal section is greater than the depth of the accommodating tank located in the rice milling section.

[0011] Optionally, the spiral retaining wall is provided with an inclined panel with an inclined direction facing the opposite direction of the rotation direction of the rice milling roller.

[0012] Optionally, the ratio of the cross-sectional area of ​​the farthest end of the accommodating groove away from the rice milling section to the cross-sectional area of ​​the farthest end of the accommodating groove away from the impurity removal section is 1.5-2:1.

[0013] Optionally, a filter is provided on the outer shell of the rice milling section.

[0014] Optionally, an air duct is provided outside the filter screen, and the air duct is connected to a fan.

[0015] Optionally, the cross-sectional area of ​​the receiving groove remains unchanged in the impurity removal section.

[0016] The beneficial effects of the utility model are:

[0017] 1. The rice milling roller drives the rice to rotate, so that the sand and gravel are separated from the rice during the rotation process and enter the impurity removal space, and then are crushed by the impurity removal section and shell of the rice milling roller. The crushed sand and gravel and sand and gravel that are not large enough to be crushed are blocked in the impurity removal space by the spiral retaining wall. As the rice milling roller rotates, they are transported forward and stop moving forward at the circumferential retaining wall, and leave the rice milling device through the slag discharge port.

[0018] 2. A large space is left in the impurity removal section to allow the mutual movement of rice and sand and gravel, so that the sand and gravel can smoothly fall to the inner wall of the shell and enter the impurity removal space. The holding tank of the rice milling section adopts a small space to promote the mutual friction and compression of rice to achieve husking; the sand and gravel are separated and collected separately to reduce the contamination of the collected husks by crushed sand and gravel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art:

[0020] Figure 1 This is a schematic diagram of the impurity removal space of an embodiment of the present application (the transmission structure and seal are hidden);

[0021] Figure 2 This is a schematic diagram of a spiral retaining wall according to an embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of an inclined panel according to an embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the filter structure of an embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of the air duct structure of an embodiment of the present application;

[0025] Figure 6 This is a schematic diagram of the change in the depth of the receiving groove for this application;

[0026] Figure 7 This is a schematic diagram of the change in the opening angle of the receiving slot in this application;

[0027] Figure 8 This is a schematic diagram of the receiving tank in Example 9 of the present application.

[0028] Explanation of the reference numerals: 1-rice milling roller; 2-housing; 3-drive shaft; 4-impurity removal section; 5-rice milling section; 6-impurity removal space; 7-accommodating tank; 8-circumferential retaining wall; 9-spiral retaining wall; 10-slag discharge port; 11-inclined panel; 12-filter screen; 13-air duct; 14-feed port; 15-air outlet. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0030] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0031] Example 1

[0032] Now, a rice milling device for shelling, removing impurities and separating provided by the embodiment of the present application is described. Figure 1 、 Figure 2 and Figure 4 As shown, it includes a rice milling roller 1, a shell 2 and a transmission shaft 3 that can drive the rice milling roller 1 to rotate and passes through the shell 2;

[0033] The rice milling roller 1 includes a impurity removal section 4 and a rice milling section 5. A impurity removal space 6 is left between the impurity removal section 4 and the shell 2. The rice milling roller 1 is provided with a receiving groove 7 that passes through the impurity removal section 4 and the rice milling section 5. The inner wall of the receiving groove 7 is spiral along the length direction of the rice milling roller 1. The inner wall of the shell 2 is provided with a circumferential retaining wall 8 between the impurity removal section 4 and the rice milling section 5. The impurity removal section 4 is provided with a spiral retaining wall 9 in the impurity removal space 6. The shell 2 is provided with a slag discharge port 10 at the end of the impurity removal section 4. The cross-sectional area of ​​the receiving groove 7 located in the impurity removal section 4 is larger than the cross-sectional area of ​​the receiving groove 7 located in the rice milling section 5.

[0034] The rice enters the shell 2 through the feed port 14 and is driven to rotate by the rice milling roller 1. The rice is not completely filled in the receiving groove of the impurity removal section 4, so that the sand and gravel are separated from the rice during the rotation and enter the impurity removal space 6, and then are crushed by the impurity removal section 4 and the shell 2 of the rice milling roller 1. The crushed sand and gravel and sand and gravel that are not large enough to be crushed are blocked in the impurity removal space 6 by the spiral retaining wall 9, and are transported forward with the rotation of the rice milling roller 1, and stop moving forward when they are transported to the circumferential retaining wall 8, and leave the rice milling device through the slag discharge port 10.

[0035] A large space is left in the impurity removal section 4 to allow the mutual movement of rice and sand and gravel, so that the sand and gravel can smoothly fall to the inner wall of the shell 2 and thus enter the impurity removal space 6. The receiving groove 7 of the rice milling section 5 adopts a small space. The rice is completely filled in the rice milling section 5, which causes the rice to rub and squeeze each other to achieve husking; the sand and gravel are separated from the husks and collected separately, reducing the contamination of the collected husks by the crushed sand and gravel.

[0036] Example 2

[0037] In another embodiment of the present application, Figure 7 As shown, the cross-sectional area of ​​the receiving groove 7 gradually decreases from the end away from the rice milling section 5 to the end away from the impurity removal section 4. In order to enable the rice in the receiving groove 7 to move smoothly from the impurity removal section 4 to the rice milling section 5, the cross-sectional area of ​​the receiving groove 7 is uniformly contracted along the length direction of the rice milling roller 1 to avoid the formation of barriers in the receiving groove 7 that hinder the movement of the rice.

[0038] Example 3

[0039] In another embodiment of the present application, Figure 7 As shown, the opening angle of the receiving groove 7 in the impurity removal section 4 is greater than the opening angle of the receiving groove 7 in the rice milling section 5. By adjusting the opening angle to reduce the cross-sectional area of ​​the receiving groove 7, the opening angle of the receiving groove 7 in the impurity removal section 4 is increased to facilitate smooth entry of rice into the receiving groove 7. At the same time, adjusting the opening angle and cross-sectional area of ​​the receiving groove 7 can maximize the diameter of the central axis of the rice milling roller 1, thereby ensuring the strength of the rice milling roller 1. This is especially true for the rice milling roller 1 in the impurity removal section 4, which needs to crush stones by extrusion, which places high demands on the strength of the rice milling roller 1.

[0040] Example 4

[0041] In another embodiment of the present application, Figure 6 As shown, the depth of the receiving groove 7 located in the impurity removal section 4 is greater than the depth of the receiving groove 7 located in the rice milling section 5. Although changing the cross-sectional area of ​​the receiving groove 7 by adjusting the depth will reduce the strength of the rice milling roller 1 in the impurity removal section 4 to a certain extent, the rice milling roller 1 of this design is less difficult to process than that of Example 2, and the inner wall of the receiving groove 7 along the length direction of the rice milling roller 1 only has a spiral direction change without a superimposed opening angle change.

[0042] Example 5

[0043] In another embodiment of the present application, Figure 3 As shown, the spiral retaining wall 9 is provided with an inclined panel 11 with an inclined direction facing the opposite direction of rotation of the rice milling roller 1. The inclined panel 11 provided on the spiral retaining wall 9 can reduce the probability of the spiral retaining wall 9 and the outer wall 2 clamping the rice, effectively reducing the broken rice rate.

[0044] Example 6

[0045] In another embodiment of the present application, Figure 6-Figure 8As shown, the ratio of the cross-sectional area of ​​the farthest end of the receiving groove 7 away from the rice milling section 5 to the cross-sectional area of ​​the farthest end of the receiving groove 7 away from the impurity removal section 4 is 1.5-2:1. The cross-sectional area of ​​the receiving groove 7 directly affects the strength of the rice milling roller 1 and the efficiency of rice husking. An enlarged receiving groove 7 can improve the efficiency of rice husking, but will reduce the strength of the rice milling roller 1. The ratio of the cross-sectional area of ​​the farthest end of the receiving groove 7 away from the rice milling section 5 to the cross-sectional area of ​​the farthest end of the receiving groove 7 away from the impurity removal section 4 is 1.5-2:1, which can balance the design ratio of work efficiency and strength of the rice milling roller 1.

[0046] Example 7

[0047] In another embodiment of the present application, Figure 4 As shown, the outer shell of the rice milling section 5 is provided with a filter 12. Figure 4 The filter 12 shown in the figure is merely a schematic representation of the relative position of the filter 12 and does not constitute a restriction on the mesh size of the filter 12 or the ratio of the mesh area to the overall area of ​​the filter 12. Since there is no need to crush stones in the rice milling section 5, installing the filter 12 there can pre-separate the husks that have been husked in the rice milling section 5 without damaging or clogging the filter 12 due to stones.

[0048] Example 8

[0049] In another embodiment of the present application, Figure 4 and Figure 5 As shown, an air duct 13 is provided outside the filter 12, connected to a fan. The fan removes the hulled rice husks, allowing the spaces between the impurity removal section 4 and the rice milling section 5 to be relatively connected. The rice grains therein can, to a certain extent, block the receiving slots 7 at the circumferential retaining wall 8, isolating the impurity removal section 4 from the rice milling section 5 and reducing the impact of air extraction on the impurity removal section 4. The rice husks released from the rice milling section 5 pass through the filter 12 into the air duct and are discharged through the air outlet 15. This application does not involve the structural design of the fan itself, so the structure separating the rice husks from the fan during extraction is not shown in the figure.

[0050] Example 9

[0051] In another embodiment of the present application, Figure 8 As shown, the cross-sectional area of ​​the receiving groove 7 remains unchanged in the impurity removal section 4. In order to provide more space for grains and sand and gravel to move in the impurity removal section 4 as the rice milling roller 1 rotates, the cross-sectional area of ​​the receiving groove 7 of the impurity removal section 4 remains unchanged. During the grain delivery process, the ratio of the grain stacking volume to the space of the impurity removal section receiving groove is less than 2 / 3.

[0052] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A rice milling device with hulling and impurity removal, comprising a rice milling roller, a shell, and a transmission shaft that can drive the rice milling roller to rotate and passes through the shell, characterized in that: The rice milling roller includes a debris removal section and a rice milling section, a debris removal space is left between the debris removal section and the shell, the rice milling roller is provided with a receiving groove passing through the debris removal section and the rice milling section, the inner wall of the receiving groove is spiral along the length direction of the rice milling roller, the inner wall of the shell is provided with a circumferential retaining wall between the debris removal section and the rice milling section, the debris removal section is provided with a spiral retaining wall in the debris removal space, the shell is provided with a slag discharge port at the end of the debris removal section, and the cross-sectional area of ​​the receiving groove located in the debris removal section is larger than the cross-sectional area of ​​the receiving groove located in the rice milling section.

2. The hulling and impurity-removing separation type rice milling device according to claim 1, characterized in that: The cross-sectional area of ​​the accommodating groove gradually decreases from the end away from the rice milling section to the end away from the impurity removal section.

3. The hulling and impurity-removing separation type rice milling device according to claim 2, characterized in that: The opening angle of the accommodating groove located in the impurity removing section is greater than the opening angle of the accommodating groove located in the rice milling section.

4. The hulling and impurity-removing separation type rice milling device according to claim 2, characterized in that: The depth of the accommodating groove located in the impurity removing section is greater than the depth of the accommodating groove located in the rice milling section.

5. The hulling and impurity-removing separation type rice milling device according to any one of claims 1 to 4, characterized in that: The spiral retaining wall is provided with an inclined panel with an inclined direction facing the opposite direction of the rotation direction of the rice milling roller.

6. The hulling and impurity-removing separation type rice milling device according to any one of claims 1 to 4, characterized in that: The ratio of the cross-sectional area of ​​the farthest end of the accommodating groove away from the rice milling section to the cross-sectional area of ​​the farthest end of the accommodating groove away from the impurity removing section is 1.5-2:

1.

7. The hulling and impurity-removing separation type rice milling device according to claim 5, characterized in that: The outer shell of the rice milling section is provided with a filter.

8. The hulling and impurity-removing separation type rice milling device according to claim 7, characterized in that: An air duct is arranged outside the filter screen, and the air duct is connected to a fan.

9. The hulling and impurity-removing separation type rice milling device according to claim 1, characterized in that: The cross-sectional area of ​​the accommodating groove remains unchanged in the impurity removal section.

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