A method for selecting and processing extra-long fragrant rice

Abstract

The invention discloses a kind of super long fragrant rice selection processing method, belong to the field of rice processing technology, including color sorting, graded screening and packaging, the graded screening refers to retaining the rice with better integrity, preventing it from vertically entering the broken rice area from the sieve hole; the graded screening is provided with three layers of screens in parallel, and the spacing from the upper layer to the lower layer of screen is 0.65~0.75 of the rice length; the mesh diameter of the middle and lower layers of screens is 0.7-0.9 times that of the upper layer of screen, and its mesh uniformity is kept consistent by increasing the mesh area; by adjusting the spacing of the middle layer of screen, the rice with better integrity falling vertically into the sieve hole is intercepted by the lower layer of screen and cannot pass through the sieve. The whole process avoids the rice with high integrity from falling vertically into the sieve hole, and then directly falls into the broken rice outlet, thereby improving the rice output rate of excellent rice.

Description

Technical Field

[0001] The invention relates to the technical field of rice processing, in particular to a method for selecting and processing extra-long fragrant rice. Background Art

[0002] Long-grain fragrant rice, a variety of indica rice, has a sweet, glutinous texture and a unique aroma. Its characteristics are: the overall appearance of the rice grains is elongated; the average length of intact whole rice kernels is no less than 7 mm; the average width of intact whole rice kernels is no less than 3 mm. Fragrant rice grains are always distinct and longer than regular rice, with an average length of 7.45 mm, two to three times that of regular rice. Some fragrant rice grains range from 6.61 to 7.5 mm in length, with some exceeding 7.5 mm, reaching around 10.2 mm, and some even reaching between 14 and 15 mm in length.

[0003] The processing of rice largely determines the quality of rice. During the rice processing process, the quality of rice is mostly distinguished during the rice screening process. Rice with high integrity and length, thickness and weight that meet the standards is screened as high-quality rice, and the remaining rice is second-grade rice.

[0004] When screening rice in the existing technology, different numbers of screens are mostly used to screen the rice length. During the screening process, the length of many rice grains actually meets the requirements for high-quality rice. However, due to the vibration process of rice screening during the screening process, the rice may move vertically. Many rice grains with qualified lengths may directly pass through the holes of the screen vertically, resulting in the collection of second-quality rice that should have been high-quality rice, resulting in a lower yield of high-quality rice during screening.

[0005] Our technical staff conducted technical research on the problems found above and worked out solutions. They then contacted the screen manufacturers to jointly discuss and develop this application, so as to achieve the effect of high fragrant rice processing integrity and higher fragrant rice yield. Summary of the Invention

[0006] The object of the present invention is to overcome the above-mentioned background technical difficulties and provide a method for selecting and processing super-long fragrant rice with a high rice yield of superior quality.

[0007] a. Color sorting: After the rice is hulled and the bran is separated, the rice is sorted by color sorting machine;

[0008] b. Grading and screening: The rice is screened by grading and screening to select rice with high integrity;

[0009] c. Packaging: Packing the rice with high integrity screened in step c;

[0010] The grading screening is to retain the rice with better integrity and prevent it from entering the broken rice area vertically through the sieve holes;

[0011] The graded screening comprises three layers of screens arranged in parallel, with the spacing between the upper and lower layers being 0.65 to 0.75 times the length of the rice. The mesh diameters of the middle and lower layers of the screens are 0.7 to 0.9 times that of the upper layer, and the mesh uniformity is maintained by increasing the mesh area. By adjusting the spacing of the middle layer of the screens, rice with good integrity that falls vertically into the screen holes is intercepted by the lower layer of the screen and cannot pass through the screen.

[0012] The working principle of this solution is as follows: after the rice passes the color sorting in step a, it enters step b for graded screening. Most of the rice with high integrity moves to the superior rice outlet on the surface of the top screen in step b, and a small part of the rice falls vertically into the sieve holes. By setting the upper screen, the middle screen and the lower screen, adjusting the spacing between the upper and lower screens and the sieve hole phase of each screen, the rice with good integrity falls vertically into the top screen, but will be intercepted by the bottom screen and cannot pass through the bottom screen. The rice with poor integrity is allowed to fall normally into the broken rice outlet through the vibration between the screens in the upper, middle and lower screens. Finally, it is only necessary to take out the rice in the upper, middle and lower screens to obtain the rice with high integrity, and then the rice with high integrity is packaged.

[0013] The beneficial effect of this solution is that after the color sorting, when the rice enters the grading screen, most of the rice with high integrity will not be able to pass through the aperture of the upper screen due to the qualified length, and will directly enter the rice outlet for high-quality rice. A small part of the rice with unqualified integrity or the rice will fall vertically into the screen holes. After setting up multiple screen holes, by adjusting the spacing between the upper screen, the middle screen and the lower screen and the screen hole phase of each screen, the rice with good integrity will fall vertically into the screen holes of the top screen, but The rice with poor integrity will also be intercepted by the lowest screen and cannot pass through it. The rice with poor integrity will be vibrated between the upper, middle and lower screens, so that it can fall into the broken rice outlet normally. Finally, you only need to take out the rice in the upper, middle and lower screens to obtain the rice with high integrity, and then pack the rice with high integrity. The whole process avoids the rice with high integrity from falling directly vertically into the sieve holes and then falling into the broken rice outlet, thereby improving the output rate of high-quality rice.

[0014] Furthermore, the vertical lines of the mesh centers of the upper and middle screens coincide with each other, and the vertical line of the mesh center of the upper screen falls on the mesh line of the lower screen, thereby ensuring that rice of any size, as long as it is of acceptable integrity, cannot pass through the lower screen.

[0015] Furthermore, the graded screening employs a screening machine device comprising a screen frame and a screen mesh, the screen frame being provided with a vibration mechanism, the screen mesh comprising an upper screen mesh, a middle screen mesh, and a lower screen mesh arranged in parallel, the upper screen mesh being fixedly connected to the screen frame, the middle screen mesh being connected to the screen frame via an adjustment device, and the lower screen mesh being connected to the screen frame via an elastic member; the adjustment device being capable of adjusting the spacing between the middle screen mesh and the upper and lower screen meshes along a direction in which the screen meshes are arranged parallel to each other; the elastic member being capable of providing elastic vibration to the lower screen mesh along a direction in which the screen meshes are arranged parallel to each other, so that the final vibration frequency of the lower screen mesh is inconsistent with that of the upper and middle screen meshes. This ensures that, regardless of the size of rice, rice of acceptable integrity can only pass through the uppermost screen mesh to the high-quality rice outlet, while rice of insufficient integrity can only pass through the lowermost screen mesh due to the arrangement of the vibration mechanism and the elastic member.

[0016] Furthermore, the adjustment device adjusts the distance between the middle and upper screens to 1.0 to 1.45 times the thickness of the rice. This arrangement ensures that when unsatisfactory rice is screened, rice that enters the middle screen from the upper screen lying flat can be screened through the gap between the middle and upper screens to the broken rice outlet.

[0017] Furthermore, the elastic member causes the vibration amplitude of the lower screen to be 0.25 to 0.35 times the length of the rice. This ensures that when the lower screen is moved by the elastic member, the end of the rice with good integrity can still be against the upper screen, preventing it from leaking out of the bottom screen.

[0018] Furthermore, the elastic member includes a sleeve fixedly mounted on the screen frame, a support rod is provided in the sleeve, the upper end of the support rod is fixedly connected to the lower screen, and a spring is provided between the lower end of the support rod and the sleeve.

[0019] Furthermore, the direction of the support rod is perpendicular to the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the screening machine device in the present invention.

[0021] Figure 2 Schematic diagram of the structure of various types of extra-long fragrant rice in the screen.

[0022] Figure 3 Schematic diagram of the structure of the screen.

[0023] Figure 4 for Figure 1 Schematic diagram of the side structure after the upper and middle screens, the middle and lower screens, the adjustment device and the elastic member are connected.

[0024] Figure 5 for Figure 3 Schematic diagram of the three-dimensional structure.

[0025] In the figure, 1. vibration mechanism; 2. screen frame; 3. screen; 4. elastic member; 5. adjustment device. DETAILED DESCRIPTION

[0026] The technical solutions of the present invention are described clearly and completely below in conjunction with specific embodiments of the present invention. The described embodiments are only a portion of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] A method for selecting and processing extra-long fragrant rice comprises the following steps:

[0029] a. Color sorting: Use a color sorter to sort the rice after the hulls and bran are separated;

[0030] b. Grading and screening: The rice is screened by grading and screening to select rice with high integrity;

[0031] c. Packaging: Packing the rice with high integrity screened in step c;

[0032] like Figure 1-3 The figure shows the screening machine device used in step b. The screening machine includes a screen frame, a vibration mechanism is connected to the left side of the screen frame, and a screen with an inclination angle of 15° is provided in the screen frame. The screens include an upper screen, a middle screen and a lower screen from top to bottom. The screens are arranged parallel to each other, and the upper screen is fixedly connected to the screen frame body; the vertical lines of the center points of the meshes of the upper and middle screens coincide, and the vertical line of the center point of the mesh of the upper screen falls on the mesh line of the lower screen.

[0033] like Figure 4-5 , each leg on the screen frame is respectively provided with an adjusting device, the adjusting device is provided with a rod, the adjusting device is provided with an adjusting mechanism for adjusting the rod to move up and down in the adjusting device, the adjusting device is provided with two switches, one switch is a tightness switch connecting the adjusting device and the leg, and the other switch is an operating switch for controlling the rod to move up and down in the adjusting device, the bottom surface of the middle screen is fixedly connected to the end of the rod, and the screen frame is provided with an elastic member supporting the lower screen, the elastic member includes a sleeve fixedly connected to the screen frame, a support rod perpendicular to the lower screen is provided in the sleeve, the upper end of the support rod is fixedly connected to the bottom surface of the third screen, the lower end of the support rod is provided with a spring fixedly connected to the inner wall of the sleeve, the lower end of the upper screen is connected with a superior rice outlet, and a broken rice outlet is provided below the lower screen.

[0034] like Figure 2-3 By adjusting the adjusting device, the height of the middle screen is controlled, and then the position relationship between the middle screen and the lower screen is adjusted so that the spacing between the sieve holes of the three screens and the spacing between the screens are as shown in the figure.

[0035] By adjusting the adjusting device and the elastic part, the distance between the upper and lower screens is adjusted to 0.65~0.75 of the rice length; the mesh diameters of the middle and lower screens are 0.7-0.9 times that of the upper screen. The adjusting device adjusts the distance between the middle screen and the upper screen to 1.0~1.45 of the rice thickness. The elastic part makes the vibration amplitude of the lower screen 0.25~0.35 of the rice length. The applicant conducted multiple experiments and finally selected a spacing between the upper and lower screens of 0.65-0.75 of the rice length. During this period, the applicant also tested spacings of 0.5, 0.6, and 0.7 of the rice length. The final test results showed that when the spacing was 0.65-0.75, the yield of rice with good integrity was the highest, and the quality of rice of this length was most easily accepted by the market. At the same time, when the spacing between the upper and lower screens was 0.75, it can be ensured that the screened rice is higher than the market assessment of broken rice (the international assessment of broken rice is 3 / 4 of the length of intact rice), and all the screened rice is high-quality extra-long rice.

[0036] The specific implementation method is as follows: after the rice is color-sorted by the color sorter, the qualified rice is put into the screening device for screening. As the vibration mechanism is started, most of the rice is screened, and the qualified rice will move downward along the surface of the upper screen and then enter the high-quality rice outlet. During implementation, the spacing between the upper screen and the lower screen in the screening device is 0.65-0.75 of the rice length, so that the rice that cannot pass through the upper screen, the middle screen and the lower screen is stuck and is all qualified rice. The elastic member makes the vibration amplitude of the lower screen 0.25-0.35 of the rice length. This setting can avoid excessive spring force. When the spring releases force downward, the rice tilts and falls directly downward into the broken rice outlet. When the spring releases force and is subjected to downward force, one end of the rice with high integrity can still lean against the upper screen, so that it will not leak from the lowest screen.

[0037] like Figure 2 During the screening process, rice that is shorter than the aperture of the upper screen will fall to the middle screen. If one end of the rice is against the aperture of the middle screen but the other end is caught by the sieve holes of the middle screen, it will also become tilted. The tilted rice will gradually move downward from the middle screen with the vibration, and then pass through the lower screen. The rice with insufficient integrity will eventually enter the broken rice outlet under the lower screen.

[0038] During screening, the length of the rice exceeds the upper screen, but due to the vertical movement, the rice falls into the middle screen. When the rice enters the middle screen, one end of the rice will lean against the screen of the middle screen, and the bottom end of the rice will contact the mesh of the lower screen, making it impossible for the rice to pass through the lower screen. At this time, the vibration of the vibration mechanism will make the rice stuck in the screen vibrate, but the vibration amplitude cannot make the rice shake out of the screen. At this time, the elastic part fixedly connected to the bottom of the lower screen gives the lower screen an upward elastic force, making it easier for the rice to pop up from the lower screen to the upper screen, so that the rice returns to the upper screen for screening and slides to the superior rice outlet.

[0039] In specific implementation, the support rod of the elastic member cannot be made too long or too soft, and the elastic member can only control the lower screen to bounce up and down in the vertical direction of the support rod.

[0040] Example 2

[0041] On the basis of Example 1, if the amount of rice added is too much, the spacing between the upper screen and the lower screen in the screening machine device is 0.65~0.75 of the rice length. Since the spacing is too low, the screening rate will be reduced. During the research and development process, the applicant set a primary screen parallel to the upper screen above the upper screen of the screen frame. The aperture of the primary screen is equal to the aperture of the upper screen. The lower end of the primary screen is connected to a high-quality rice outlet, and the length of the outlet is shorter than the length of the outlet of the upper screen.

[0042] The specific implementation method is as follows: during implementation, the primary screen performs an initial screening on the rice put in, and a large amount of rice of appropriate length falls directly into the rice outlet at one end of the primary screen and then falls into the high-quality rice outlet connected to the upper screen, thereby achieving the effect of collecting rice. A small amount of rice that falls vertically from the screen holes of the primary screen falls onto the upper, middle and lower screens for screening. At this time, the burden on the upper, middle and lower screens is reduced, but it also avoids the high-integrity rice that passes vertically through the primary screen directly entering the broken rice outlet, thereby improving the overall screening rate and the rice output rate of high-integrity rice.

[0043] In specific implementation, the broken rice sifted by the ordinary screening machine can also be poured into the screening machine of the present invention, and the high-quality rice that vertically falls into the broken rice outlet during screening by the ordinary screening machine can be screened out to improve the rice output rate of the high-quality rice.

[0044] Example 3

[0045] In addition to the first and second embodiments, the sleeve and the screen frame are detachably connected. In this embodiment, after removing the sleeve, adjusting the length of the spring in the sleeve and the length of the support rod can adjust the vertical position of the middle and lower screens, thereby adjusting the spacing between the upper and lower screens to adjust the spacing according to the length of rice being screened, thereby expanding the use space of the entire screening machine.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0047] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for selecting and processing super-long fragrant rice, characterized by: The following steps are involved: a. Color sorting: After the rice is hulled and the bran is separated, the rice is sorted by color sorting machine; b. Grading and screening: The rice is screened by grading and screening to select rice with high integrity; c. Packaging: Packing the rice with high integrity screened in step b; The graded screening adopts a screening machine device, which includes a screen frame and a screen. The screen frame is provided with a vibration mechanism. The screen includes an upper screen, a middle screen and a lower screen arranged in parallel. The upper screen is fixedly connected to the screen frame, the middle screen is connected to the screen frame through an adjustment device, and the lower screen is connected to the screen frame through an elastic member. The adjustment device can adjust the distance between the middle screen and the upper and lower screens along the direction in which the screens are arranged parallel to each other; The elastic member can provide elastic vibration for the lower screen along the direction parallel to the screen, so that the final vibration frequency of the lower screen is inconsistent with that of the upper and middle screens. The grading screening is to retain the rice with better integrity and prevent it from entering the broken rice area vertically through the sieve holes; The spacing between the upper and lower screens is 0.65-0.75 times the length of the rice; the sieve hole diameters of the middle and lower screens are 0.7-0.9 times that of the upper screen, and the mesh area is increased to maintain consistent sieve hole uniformity; by adjusting the spacing between the upper, middle, and lower screens, the rice with good integrity that falls vertically into the sieve holes is intercepted by the lower screen and cannot pass through the screen; The adjusting device adjusts the distance between the middle screen and the upper screen to 1.0-1.45 of the thickness of rice; The elastic member makes the vibration amplitude of the lower screen be 0.25-0.35 of the length of the rice.

2. The method for selecting and processing super-long fragrant rice according to claim 1, wherein: The vertical lines of the center points of the sieve holes of the upper and middle screens coincide with each other, and the vertical line of the center points of the sieve holes of the upper screen falls on the mesh line of the lower screen.

3. The method for selecting and processing super-long fragrant rice according to claim 1 or 2, wherein: The elastic member includes a sleeve fixedly arranged on the screen frame, a support rod is arranged in the sleeve, the upper end of the support rod is fixedly connected to the lower screen, and a spring is arranged between the lower end of the support rod and the sleeve.

4. The method for selecting and processing super-long fragrant rice according to claim 3, wherein: The direction of the support rod is perpendicular to the screen.

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