Preboiled rice processing equipment

Abstract

The invention discloses preboiled rice processing equipment, and relates to the technical field of preboiled rice processing, the preboiled rice processing equipment comprises a pair of hulling rollers, a slip flow plate is arranged above the pair of hulling rollers, the lower end part of the slip flow plate is provided with a correction part for adjusting the orientation of gliding grains, the correction part comprises an extension plate, and the extension plate is fixedly provided with a plurality of splitter plates; a maintaining part, an avoiding part and a shielding part are sequentially arranged on the two side faces of the splitter plate, a partition plate for correcting the grain state is arranged in the grain channel, and transverse grains enter the grain channel, make contact with the end of the partition plate, are turned over and corrected to be vertical and enter a gap between the pair of hulling rollers to be hulled. The straightening part is arranged on the lower portion of the slip flow plate, the straightening part can adjust the downward sliding direction of grains, the grains vertically slide downwards in the length direction of the slip flow plate or slide downwards in an approximately vertical state, in other words, the grains longitudinally enter the gap between the two hulling rollers to be hulled, the hulling rate of the grains is effectively increased, and the breakage rate of rice grains is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of parboiled rice processing, and specifically to a parboiled rice processing device. Background Art

[0002] Parboiled rice is a rice product made from paddy rice as raw material, which is subjected to hydrothermal treatments such as cleaning, soaking, steaming, and drying, and then processed by the conventional paddy rice hulling and milling methods.

[0003] The existing hulling of parboiled rice is mainly carried out by a rubber roll type hulling machine. The rubber rolls rotate towards each other and have a rotational speed difference. The paddy grains enter the gap between the rubber rolls. Due to the differential speed of the two rubber rolls, the differential rotation generates extrusion and rubbing effects, separating the paddy husk from the brown rice. The paddy rice in the hopper of the hulling machine reaches the sliding plate via the vibrating feeder. The lower end of the sliding plate is directly opposite to the gap between the rubber rolls, separating the paddy husk from the brown rice.

[0004] When the paddy rice slides down on the sliding plate, it slides randomly. Therefore, when the paddy rice enters the gap between the rubber rolls, it has various angles, entering in a vertical state, a horizontal state (the grains are transverse), or an inclined state. As Figure 1 and Figure 2 shown, they enter in a vertical and a horizontal state respectively. The contact surfaces of the two at the middle position of the line connecting the axes of the rubber rolls and the contact surfaces of the two rolls are different. The contact surface in the vertical state is wider, and in the horizontal state, because the grains are ellipsoidal and enter in the horizontal state, the cross-section in the axial direction of the rubber rolls is approximately circular. When the rubber rolls rotate differentially, the grains are likely to roll, resulting in unsuccessful or incomplete shelling. For this reason, we propose a parboiled rice processing device. Summary of the Invention

[0005] The purpose of the present invention is to provide a parboiled rice processing device to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A parboiled rice processing device includes a pair of hulling rolls rotating towards the inside with different circumferential speeds, a sliding plate is provided above the pair of hulling rolls, and a correction part for adjusting the orientation of the sliding paddy grains is provided at the lower end of the sliding plate; The correction part includes an extension plate integrated with the lower end of the air slide plate. A number of flow dividing plates are fixedly arranged at equal intervals along the axial direction of the hulling roller on the upper surface of the extension plate. A grain channel is formed between the opposite sides of adjacent flow dividing plates. A holding part, an avoidance part and a shielding part are successively arranged on both side surfaces of the flow dividing plate along the downward sliding direction of the air slide plate. A partition plate for correcting the grain state is arranged in the grain channel between the opposite sides of adjacent flow divisions. The holding part, the shielding part and the partition plate all extend straight downward along the length direction of the air slide plate. The transverse distance L between two holding parts in the same grain channel is greater than the length dimension of the grain to be hulled, and L is less than twice the length of the grain to be hulled. Neither the avoidance part nor the shielding part is within the circumference with the length of the grain to be hulled as the radius R. The horizontally moving grains enter the grain channel, contact the end of the partition plate, turn over and are corrected into a vertical state, and then enter the gap between a pair of hulling rollers for hulling.

[0007] Preferably, the transverse distance L between two holding parts in the same grain channel is 1.5 times the average thickness dimension of the grain to be hulled.

[0008] Preferably, a number of secondary correction plates are arranged between the shielding part and the adjacent partition plate. The gaps between the adjacent secondary correction plates, the partition plate and the shielding part are all greater than the thickness dimension of the grain to be hulled.

[0009] Preferably, the thickness dimension of the secondary correction plate along the normal direction of the upper surface of the extension plate is less than half of the thickness dimension of the grain to be hulled.

[0010] Preferably, when the number of secondary correction plates between the adjacent partition plates and the shielding part is at least two groups, the height of the upper end of the secondary correction plates from the partition plate to the shielding part direction decreases.

[0011] Preferably, the upper end of the flow dividing plate is conical, and the downward extension lines of the two side inclined surfaces intersect with the shielding part.

[0012] Preferably, an overflow plate is arranged above the extension plate. The upper end of the overflow plate is located in the middle of the holding part of the flow dividing plate and is used for receiving the grains that roll up and fly.

[0013] Preferably, a number of baffle plates are fixed on the extension plate or the air slide plate. Each baffle plate extends along the length direction of the air slide plate and is not in the grain channel, and is located in the middle position of the grain channel in the width direction of the air slide plate.

[0014] Preferably, the extension plate of the correction part is not integrated with the air slide plate, and the correction part reciprocates axially on the hulling roller through a moving unit.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The present invention provides a correction part at the lower part of the slipstream board, and the correction part can adjust the direction of the grains sliding down, so that the grains slide down vertically or nearly vertically along the length direction of the slipstream board, that is, the grains enter the gap between the two hulling rollers in the longitudinal direction for hulling, thereby effectively improving the hulling rate of the grains and reducing the breakage rate of the rice grains. The present invention can effectively improve the wear position of the rubber roller on the surface of the shelling roller caused by the outlet position of the correction part by arranging the correction part to be able to move back and forth in the lateral direction, thereby avoiding the need to replace the shelling roller in advance, and the overall service life can be extended after balancing; BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the state in which the grains vertically enter into the gap between the shelling rollers; Figure 2 It is a schematic diagram of the state in which the grains enter the gap between the shelling rollers in a transverse and vertical manner; Figure 3 It is a schematic diagram of the overall structure of the present invention; Figure 4 It is the overall axial side schematic diagram of the extension part; Figure 5 for Figure 4 Schematic diagram of the view from the normal direction of the extended plate surface; Figure 6 It is a schematic diagram of the edge structure of the grain channel; Figure 7 It is a state change diagram of grains entering the grain channel laterally; Figure 8 It is a state change diagram of the grains tilting into the grain channel; Figure 9 To distinguish Figure 8 Another state change diagram of the grains tilting into the grain channel; Figure 10 Schematic diagram of the distribution structure of the secondary correction plate.

[0017] In the figure: 1. shelling roller; 2. slip plate; 3. correction part; 4. overflow plate; 5. baffle; 301. extension plate; 302. diverter plate; 303. grain channel; 304. partition plate; 305. secondary correction plate; 3021. holding part; 3022. avoidance part; 3023. shielding part. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figure 3 , the present invention provides a technical solution: a parboiled rice processing device, including a pair of hulling rollers 1 rotating towards each other with different rotational speeds. The hulling rollers 1 are installed in a frame. The same end of the two hulling rollers 1 is supported by a shaft-mounted pulley, and the pulley is connected to a motor through a belt. By setting different pulley sizes, the rotational speeds of the two hulling rollers 1 are changed to form a speed difference for hulling rice.

[0020] The angle between the line connecting the shafts of a pair of hulling rollers 1 and the horizontal line is approximately 30°, that is, the two hulling rollers 1 are arranged in an inclined state with one above the other. There is a hulling gap between the outer surfaces of the two hulling rollers 1. The slide plate 2 is arranged obliquely downward. The virtual extension line of the upper surface of the slide plate 2 in its length direction is perpendicularly crossed with the line connecting the shafts of the two hulling rollers 1, and the virtual extension line of the upper surface of the slide plate 2 in its length direction is directly opposite to the gap between the two hulling rollers 1, guiding the grains to the gap for hulling. A hopper and a vibrating feeder are also provided on the frame. The grains enter from the hopper, and the feeding speed is controlled by the vibrating feeder. The vibrating feeder transports the grains to the upper end of the slide plate 2 and slides down on the upper surface of the slide plate 2 into the gap between the two hulling rollers 1.

[0021] Refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 , a correction part 3 is provided at the lower end of the slide plate 2. It should be noted that in Figure 3Among them, the ratio of the correction part 3 is enlarged relative to the hulling roller 1. The correction part 3 adjusts the direction of the grains sliding down on the air slide plate 2 so that the length direction of the adjusted grains is consistent with the length direction of the air slide plate 2, that is, one end of the grain slides downward, and then longitudinally enters the gap of the hulling roller 1. The correction part 3 includes an extension plate 301. The extension plate 301 is in the same inclined state as the air slide plate 2 and is located at the lower end of the air slide plate 2. In this embodiment, the two are integrated. A plurality of flow dividing plates 302 are fixedly arranged at intervals along the width direction of the upper surface of the extension plate 301. The length direction of the flow dividing plates 302 is consistent with the length direction of the air slide plate 2, and the width of the flow dividing plates 302 decreases from top to bottom along the length direction of the guide plate 2. Specifically, both sides of the flow dividing plate 302 include but are not limited to and are preferably axially symmetric, and can also be asymmetric, that is, one side is up and the other side is down or others. The opposite sides of two adjacent flow dividing plates 302 form a grain channel 303. The grain channel 303 is used to adjust the orientation of the grains. One side of the flow dividing plate 302 is composed of a holding part 3021, an avoidance part 3022, and a shielding part 3023. The two holding parts 3021 of the same grain channel 303 are arranged in parallel along the length direction of the air slide plate 2. The distance L between the two is greater than the length of the grains to be hulled (this length will vary according to the type of rice seeds, and this length is a general approximate range and does not refer to the special particle length in the special case of a certain type of rice seed), and the distance L is less than twice the length of the grains to be hulled, so as to limit the range of the grains sliding downward horizontally, but not to jam the grains; A partition plate 304 is also provided on the extension plate 301 and is arranged along the grain sliding direction in the grain channel 303. The partition plate 304 is at the middle position of the grain channel 303. The distance from the upper end of the partition plate 304 to the avoidance part 3022 and the shielding part 3023 is greater than the length of the grains to be hulled, that is, within the circular range with the upper end of the partition plate 304 as the center and the length of the grains to be hulled as the radius R, there is no intersection with the avoidance part 3022 and the shielding part 3023. Figure 6 The state shown is the state where the limits are equal.

[0022] Refer to Figure 7 , this is the schematic state S1 of the grains sliding down horizontally. After sliding into the grain channel 303, due to the limitation of the holding part 3021, its horizontal range is limited, and it will inevitably contact the upper end of the partition plate 304 when sliding, and then the grains will tilt to one side of the partition plate 304 (depending on the mass ratio of the grains on both sides and the inclination angle of the grains horizontally with respect to the horizontal line). Due to the inclination after contacting the upper end of the partition plate 304, the grains slide down in a quasi-vertical or vertical state, and then enter the gap of the hulling roller 1 in this state for hulling; Refer to Figure 8 , Figure 8As shown, the grains slide down in an inclined state S2. In this state, there are two cases. One is state S21, where the grains do not touch the partition plate 304 and will directly slide down into the gap between the two hulling rollers 1 for hulling (in this case, the grains may not be completely vertical, so it will be restricted in subsequent solutions). The other state S22 is when they contact the partition plate 304. The state is similar to the above-mentioned lateral sliding case, but it also has two cases. Figure 8 It is the case of directly sliding down without flipping after contact, which is state S221. Due to the collision guidance of the partition plate 304, the grains will move towards the side of the shielding portion 3023 while sliding down, and may be corrected again by collision, or may directly slide down. Refer to Figure 9 , Figure 9 It is the flipping case in the second case of the above-mentioned inclined state of the grains, that is, state S222. Because the contact position of the grains with the partition plate 304 is centered to the left, the grains will flip to the right and then slide down in a corrected manner.

[0023] When the grains slide down completely vertically, there is a relatively extreme case, that is, the grains arranged longitudinally in a row drop simultaneously in the transverse direction, and they may get stuck at the ends of the two holding portions 3021. Especially in the case of getting stuck when entering the holding portion 3021, because getting stuck at the mouth is relatively loose and can be solved by the vibration of the equipment itself, while getting stuck inside the holding portion 3021 is likely to be completely stuck. Therefore, preferably, the transverse distance L between the two holding portions 3021 in the same grain channel 303 is set to 1.5 times the average thickness dimension of the grains to be hulled, which can prevent two grains from entering side by side. Setting it to 1.5 times this intermediate value is because the thicknesses of the grains vary, so 1.5 times in the middle is the best. On the other hand, setting it to 1.5 times can relatively reduce the inclined state of the grains in state S21 (the inclination relative to the length direction of the sliding plate 2). Because 1.5 times shortens the transverse distance between the partition plate 304 and the adjacent holding portion 3021 compared to the state close to twice. That is to say, if the grains are inclined transversely, they will contact the partition plate 304 and then the direction will be adjusted.

[0024] Refer to Figure 6 , Figure 7 and Figure 8, because there is still a relatively large inclination angle (relative to the length direction of the stripping plate 2) in the above state S21, and in the case of state S22, the grains do not slide vertically completely. Therefore, a secondary correction plate 305 is provided between the partition plate 304 and the adjacent shielding portion 3023. The number of the secondary correction plates 305 is set corresponding to the distance between the shielding portion 3023 and the adjacent partition plate 304, that is, the distance between adjacent secondary correction plates 305 (in the case where there are at least two secondary correction plates 305 between the partition plate 304 and the adjacent shielding portion 3023), between the shielding portion 3023 and the adjacent secondary correction plate 305, and between the partition plate 304 and the adjacent secondary correction plate 305 should be greater than the thickness dimension of the grains to be hulled to prevent the grains from being stuck; Refer to Figure 4 , when the grains enter between the partition plate 304 and the shielding portion 3023, the space is relatively narrow, and the grains do not slide vertically completely. Therefore, even if the secondary correction plate 305 is provided in the width direction as described above, it is easy to cause jamming. Therefore, the height of the secondary correction plate 305 is set to be small (this height is the thickness in the normal direction of the upper surface of the extension plate 301), and the height is less than half of the thickness of the grains to be hulled, that is, it can adjust the direction of the grains and limit them without jamming the grains. Refer to Figure 10 , when the number of the secondary correction plates 305 between the partition plate 304 and the adjacent shielding portion 3023 is greater than or equal to two groups, the upper end heights of different secondary correction plates 305 are different, and are arranged in a decreasing manner from the partition plate 304 to the shielding portion 3023. This setting has multiple functions. One is to prevent the inclined grains from being caught when flipping as in Figure 9 and then rolling down laterally. Another function is to secondarily correct the state of the grains to give them a relatively large space. Refer to Figure 6 , because of the lateral gap between the shielding portion 3023 and the holding portion 3021, the upper end of the diversion plate 302 has a relatively large lateral width. Therefore, to prevent the grains from being stuck on this lateral width, the upper end of the diversion plate 302 is set to be conical. The cone is preferably as in Figure 6 with a middle bulge but not limited to this method. It can also have a bulge on one side, that is, one side of the same diversion plate 302 is a straight shape continuous with the holding portion 3021, while the other side is inclined downward. The cone will not cause grain accumulation; On the other hand, the lower virtual extension lines of the two inclined surfaces of the diversion plate 302 intersect at the shielding portion 3023. This setting facilitates the inclined surface to also orient the grains and guide them to a position close to the shielding portion 3023. Because generally the grains fall near the partition plate 304, this may cause inconsistent wear of the rubber on the hulling roller 1. Therefore, the number of grains at the edge position is increased through the inclined surface orientation to achieve balance.

[0025] Refer to Figure 3 Figure 3 , due to the inclined state of the slip plate 2, when the grains slide or roll down, because of the mutual collision of the grains, it is possible to form a bouncing slide, and the bouncing slide will bypass the correction part 3, and then enter the gap between the two hulling rollers 1 in an uncertain state. Therefore, in order to avoid this situation, an overflow plate 4 is arranged above (in the normal direction) the upper surface of the extension plate 301. The overflow plate 4 is slightly higher than the upper surface of the diversion plate 302 in the normal direction of the upper surface of the extension plate 301, and the upper end position of the overflow plate 4 is located at the middle position of the holding part 3021 in the length direction of the slip plate 2, so as to prevent the uncorrected grains from bouncing over the correction part 3.

[0026] Refer to Figure 3 、 Figure 4 and Figure 5 Figure 5 , in order to avoid relatively extreme situations, for example, in the case of state S1, multiple grains are stacked and enter the grain channel 303, which makes the grains unable to flip and then all block in the grain channel 303. Therefore, a baffle 5 is arranged above (along the length direction of the slip plate 2) the opening direction of the spacing area between the two holding parts 3021 in the same grain channel 303. Only one baffle 5 corresponds to the same grain channel 303. The baffle 5 corresponds to the diversion plate 302 at the width position of the slip plate 2, so as to disperse the stacked transverse grains and avoid the occurrence of extreme situations.

[0027] Refer to Figure 3 Figure 3 , the extension plate 301 of the correction part 3 and the slip plate 2 are not integrally arranged, that is, they are separate individuals. The entire correction part 3 is detachably installed in the frame, and a moving unit is arranged on the frame to control the correction part 3, so that the correction part 3 can reciprocate along the axial direction of the hulling roller 1. The reciprocating movement of the correction part 3 is used to balance the sliding position of the grains, so that the wear degrees at all axial positions of the entire hulling roller 1 are relatively balanced. The moving unit includes but is not limited to a telescopic cylinder or a reciprocating lead screw mechanism, etc.; The movement of the correction part 3 can be a slow and continuous movement along the axial direction of the hulling roller 1, or it can be controlled by a timer for intermittent movement.

[0028] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A parboiled rice processing device, comprising a pair of shelling rollers (1) facing inwards and rotating at different peripheral speeds, a slipstreamer (2) being provided above the pair of shelling rollers (1), characterized in that: The lower end of the slide plate (2) is provided with a correction portion (3) for adjusting the direction of the sliding grains; The correction part (3) comprises an extension plate (301) which is integral with the lower end of the flow plate (2); a plurality of diverter plates (302) are fixed on the upper surface of the extension plate (301) at uniform intervals along the axial direction of the shelling roller (1); a grain channel (303) is formed between opposite sides of adjacent diverter plates (302); a retaining part (3021), an avoidance part (3022) and a shielding part (3023) are provided in sequence on both side surfaces of the diverter plates (302) along the downward direction of the flow plate (2); a partition plate (304) for correcting the grain state is provided in the grain channel (303) between opposite sides of adjacent diverters; the retaining part (3021), the shielding part (3022) and the shielding part (3023) are provided in sequence; The blocking portion (3023) and the partition plate (304) both extend straight downward along the length direction of the slip plate (2); the lateral spacing L between the two retaining portions (3021) in the same grain channel (303) is greater than the length of the grain to be husked, and L is less than twice the length of the grain to be husked; the avoidance portion (3022) and the shielding portion (3023) are both not within a circle with a radius R of the length of the grain to be husked; the lateral grains enter the grain channel (303), contact the end of the partition plate (304), are flipped and corrected into a vertical shape, and enter the gap between the pair of shelling rollers (1) for husking.

2. The parboiled rice processing equipment according to claim 1, characterized in that: The lateral spacing L between the two retaining portions (3021) in the same grain channel (303) is 1.5 times the average thickness of the grains to be husked.

3. The parboiled rice processing equipment according to claim 1, characterized in that: A plurality of secondary correction plates (305) are provided between the shielding portion (3023) and the adjacent partition plate (304), and the gaps between the secondary correction plates (305) and the adjacent secondary correction plates (305), the partition plate (304) and the shielding portion (3023) are all larger than the thickness of the grains to be husked.

4. The parboiled rice processing equipment according to claim 3, characterized in that: The thickness dimension of the secondary correction plate (305) along the normal direction of the upper surface of the extension plate (301) is less than half of the thickness dimension of the rice grains to be husked.

5. The parboiled rice processing equipment according to claim 3 or 4, characterized in that: When the number of secondary correction plates (305) between adjacent partition plates (304) and shielding portions (3023) is at least two groups, the height of the upper end of the secondary correction plates (305) in the direction from the partition plates (304) to the shielding portions (3023) decreases gradually.

6. The parboiled rice processing equipment according to claim 1, characterized in that: The upper end of the diverter plate (302) is conical, and the lower extension lines of the inclined surfaces on both sides intersect with the shielding portion (3023).

7. The parboiled rice processing equipment according to claim 1, characterized in that: An overflow plate (4) is provided above the extension plate (301), and the upper end portion of the overflow plate (4) is located in the middle of the retaining portion (3021) of the diverter plate (302) and is used to receive the tumbling and flying grains.

8. A parboiled rice processing device according to claim 1-4, 6 or 7, characterized in that: A plurality of baffles (5) are fixed on the extension plate (301) or the flow board (2), each of which extends along the length direction of the flow board (2) and is not within the grain channel (303), and is located in the middle of the grain channel (303) in the width direction of the flow board (2).

9. The parboiled rice processing equipment according to claim 5, characterized in that: A plurality of baffles (5) are fixed on the extension plate (301) or the flow board (2), each of which extends along the length direction of the flow board (2) and is not within the grain channel (303), and is located in the middle of the grain channel (303) in the width direction of the flow board (2).

10. The parboiled rice processing equipment according to claim 3, characterized in that: The extension plate (301) of the correction part (3) is not integral with the slipstream plate (2), and the correction part (3) reciprocates in the axial direction of the shelling roller (1) through a moving unit.

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