Self-heating rice fine screening production line

Abstract

The utility model relates to a self-heating rice fine screening production line in the field of automatic rice production. The self-heating rice fine screening production line comprises a feeding station, a primary screening adsorption station, a storage station, a color sorting station and a fine screening feeding station which are communicated in sequence. According to the self-heating rice fine screening production line, a feeding unit adopting a pipe chain conveyor and other devices is changed into the positive pressure blowing feeding unit, the food processing and manufacturing cost is greatly reduced, meanwhile, the S-shaped blowing pipeline design is used for completing feeding, and meanwhile the production efficiency is greatly improved. According to the self-heating rice cooking device, light and heavy impurities in rice entering the cooking unit are screened at the same time, the purity of the rice entering the cooking unit is improved to the maximum extent, impurities in self-heating rice are reduced, and the food quality and the customer experience feeling can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of automatic rice production, and specifically, to a fine screening production line for self-heating rice rice. Background Art

[0002] With the progress of society, people have higher and higher requirements for industrialized products such as prefabricated dishes and self-heating rice. In recent years, the development of prefabricated dishes has been relatively fast, and intelligent and automated factories have emerged. However, for self-heating rice, it is necessary to remove and select impurities in rice, such as bran and small stones, to meet the standard of basically no foreign objects in small-scale home production, which poses certain challenges to the industrial production of self-heating rice.

[0003] In the prior art, the rice fine processing technology mainly completes shelling and preliminary sorting. For example, the patent No. CN201658988U discloses a rice processing production line, including a stoner, a huller, a paddy and brown rice separator, a rice milling system, a polishing system and a color sorter. The rice milling system includes a rice mill and a rice milling speed regulating device connected to the motor of the rice mill; the polishing system includes a polisher and a polishing speed regulating device connected to the motor of the polisher. In this technology, it mainly realizes the primary processing of rice, from shelled to shelled and packaged, and uses the rice milling system and the polishing system to peel and polish different rice varieties. Since it is only through one color sorting, it is difficult to be used for the automatic production of rice from primary processed rice to the rice on the dinner plate. It is difficult to be used in the automatic processing production line of self-heating rice.

[0004] In the self-heating rice production line disclosed in the prior art, the supply part of the rice raw materials is decontaminated by a rice washing device. For example, the patent No. CN108850846A discloses a self-heating rice production line, including a rice washing device, a rice soaking device, a filling device, a microwave cooking device, a film sealing device, and a secondary ripening and sterilization device. The rice washing device conveys the washed rice to the rice soaking device, and the rice soaking device conveys the soaked rice to the filling device. The filling device quantitatively conveys the soaked rice and nutrient solution to the cooking box; the microwave cooking device heats and cooks the rice and nutrient solution in the cooking box, and actively discharges steam after the rice in the cooking box is evenly cooked to accelerate the evaporation of the nutrient solution in the cooking box; the film sealing device seals the cooking box containing the cooked rice to obtain a semi-finished cooking box; the secondary ripening and sterilization device performs high-temperature sterilization and secondary ripening. It is difficult to achieve the removal of impurities only through the rice washing device in this technology. Summary of the Utility Model

[0005] Aiming at the defects in the prior art, the purpose of the utility model is to provide a fine screening production line for self-heating rice rice.

[0006] According to a fine screening production line for self-heating rice rice provided by the utility model, it includes:

[0007] The feeding station includes a feeding box and a first elevator. The raw rice enters the first elevator through the feeding box, and the first elevator lifts the raw rice in portions to a predetermined height.

[0008] The preliminary screening and adsorption station includes a winnower and a second elevator. The raw rice falling from the predetermined height of the first elevator falls into the winnower. The winnower adsorbs the light impurities in the raw rice by negative pressure and discharges them from the top. The preliminary screened rice formed after the raw rice removes the light impurities enters the second elevator from the bottom of the winnower.

[0009] The storage station includes a storage bin and a third elevator. The preliminary screened rice falls into the storage bin from the predetermined height of the second elevator, and the storage bin is connected to the third elevator.

[0010] The color sorting station includes an intermediate bin and a color sorter. The preliminary screened rice falls from the predetermined height of the third elevator into the intermediate bin. The color sorter receives the preliminary screened rice in the intermediate bin and performs color sorting to remove impurities of different colors to form medium-screened rice.

[0011] The fine screening and feeding station includes a rotary air lock valve, a conveying pipe, and a Roots blower. The conveying pipe is in an overall S shape, and the outlet of the conveying pipe is higher than the inlet. The inlet of the conveying pipe is connected to the Roots blower, and the outlet of the conveying pipe is used to connect to the feeding device of the rice cooking line. The rotary air lock valve is connected to the color sorter to receive the medium-screened rice, and the rotary air lock valve is connected to the conveying pipe and is close to the Roots blower. The medium-screened rice rotating out of the rotary air lock valve enters the conveying pipe and is blown towards the outlet end of the conveying pipe under the action of wind force. Heavy impurities are separated when passing through the vertical section of the conveying pipe, and light impurities are separated under the action of positive pressure wind force to form fine-screened rice and enter the feeding device of the rice cooking line.

[0012] In some embodiments, the winnower includes a first cavity, a second cavity, a wind plate, and an adjusting mechanism. The outer side of the first cavity is provided with a feeding port, the bottom end of the first cavity is provided with a discharging port, and the top end of the second cavity is provided with a negative pressure adsorption port.

[0013] The first cavity and the second cavity are arranged adjacent to each other. The partition between the first cavity and the second cavity forms an air duct. The wind plate is located in the second cavity and is connected to the adjusting mechanism. The wind plate is close to or away from the predetermined distance of the air duct through the adjusting mechanism.

[0014] In some embodiments, a convex platform is formed inside the feeding port, and the convex platform and the air duct form a slit air duct.

[0015] In some embodiments, the adjusting mechanism includes multiple groups of adjusting components. Each adjusting component includes a driving rod and a hinged plate. The hinged plate is a triangular plate. The top angle end of the hinged plate is hinged inside the second cavity. One end of the driving rod enters the second cavity and is hinged to the middle angle end of the hinged plate. The air plate is provided with a vertical chute, and the bottom angle end of the hinged plate is slidably connected inside the vertical chute.

[0016] In some embodiments, there are multiple groups of the storage bins, and the multiple groups of storage bins are arranged side by side. The storage station further includes a first scraper conveyor and a second scraper conveyor. The first scraper conveyor receives the preliminarily screened rice from the second elevator and distributes it into each storage bin. The second scraper conveyor is used to receive the preliminarily screened rice from the storage bin and convey it to the third elevator.

[0017] In some embodiments, the color sorting station includes multiple groups of the intermediate bins and the color sorter. There are multiple groups of the third elevators. The discharge ports of the multiple groups of color sorters converge to form a first material channel and a second material channel. The first material channel is communicated with the air lock, and the second material channel is communicated with the third elevator. The medium-screened rice after being color sorted by the color sorter is color sorted again after passing through the third elevator.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. For the self-heating rice rice fine screening production line provided by the utility model, by changing the feeding unit using devices such as a tube chain conveyor to a positive pressure blowing feeding unit, the food processing and manufacturing cost is greatly reduced. At the same time, while using the S-shaped blowing pipeline design to complete the feeding, the screening of light and heavy impurities of the rice entering the steaming unit is realized simultaneously, maximizing the purity of the rice entering the steaming unit, reducing the impurities in the self-heating rice, and effectively improving the food quality and the customer experience.

[0020] 2. In the self-heating rice rice fine screening production line of the utility model, an air separator with a vertical side-in air flow channel structure is adopted. Especially when forming the slit air channel mechanism, it can form a good adsorption effect on the light impurities while reducing the mis-aspiration amount of the raw rice particles when the raw rice falls from the side inlet, saving raw materials and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the utility model will become more obvious:

[0022] Figure 1 It is a schematic diagram of the overall structure of the self-heating rice rice fine screening production line of the utility model;

[0023] Figure 2This is a schematic structural diagram of the pneumatic separator of the present utility model. Detailed implementation mode

[0024] The present utility model will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present utility model, but do not limit the present utility model in any form. It should be noted that those of ordinary skill in the art can make several changes and improvements without departing from the concept of the present utility model. These all belong to the protection scope of the present utility model.

[0025] This embodiment provides a rice fine screening production line for self-heating rice, belonging to the raw material production line in the self-heating rice assembly production line, as Figure 1 shown, mainly including a feeding station 100, a primary screening and adsorption station 200, a storage station 300, a color sorting station 400, and a fine screening and feeding station 500 that are connected in sequence.

[0026] The feeding station 100 mainly includes a feeding box 110 and a first elevator 120. The raw rice enters from the inlet of the feeding box 110 and passes through the bottom outlet of the feeding box 110 into the rice loading tray of the first elevator 120. Structures such as a circulating track are arranged in the first elevator 120 to drive the rice loading tray to travel to a predetermined height. This predetermined height is generally the top position, and the rice in the tray is dumped by means of circular flipping.

[0027] The primary screening and adsorption station 200 mainly includes a pneumatic separator 210 and a second elevator 220. The first elevator 120 is connected to the pneumatic separator 210 through a pipeline. After the raw rice in the rice loading tray of the first elevator 120 is lifted to a predetermined height, it is flipped and scattered into the side inlet of the pneumatic separator 210. The pneumatic separator 210 is a negative pressure type mechanism, and light impurities in the scattered raw rice, such as foam particles, bran, and dust, are suction-separated and discharged from the top port through suction force, forming the initially screened rice. The initially screened rice enters the second elevator 220 from the bottom outlet of the pneumatic separator 210, and the second elevator 220 lifts the initially screened rice to a predetermined height. In this embodiment, the structure of the pneumatic separator 210 mainly includes a first cavity 111, a second cavity 112, a wind plate 113, and an adjustment mechanism 114. As Figure 2As shown, the first cavity 111 and the second cavity 112 are two adjacent cavities located in the same housing structure. The first cavity 111 and the second cavity 112 are separated by a partition board. A wind channel 115 is formed on the partition board by means of material removal. The wind channel 115 can be a rectangular door and window structure without a barrier, or a louver structure with a barrier. In this embodiment, the rectangular door and window structure without a barrier is taken as an example for illustration. The outer side of the first cavity 111 is provided with a feed inlet 1111, the bottom of the first cavity 111 is provided with a discharge outlet 1112, and a negative pressure suction port 1121 is provided at the top of the second cavity 112. The wind plate 113 is located in the second cavity 112. The wind plate 113 serves as the air door of the wind channel 115, and the distance from the wind channel 115 is adjusted through the adjusting mechanism 114 to achieve the adjustment of the air pressure magnitude. The adjusting mechanism 114 is mainly composed of multiple groups of adjusting components. The adjusting components mainly include a driving rod 1141 and a hinged plate 1142. One end of the driving rod 1141 enters the second cavity 112 from a sliding hole on the outer side plate of the second cavity 112 and is connected to the hinged plate 1142. The hinged plate 1142 is a triangular structural plate. Its top angle end is hinged to a corresponding support member arranged in the second cavity 112. Its middle angle end is hinged to the end of the driving rod 2141, and its bottom angle end is slidably connected to a vertical sliding groove 1131 opened on the wind plate 113. As Figure 2 shown, when the driving rod 1141 is pushed into the cavity manually or by an automatic device, since the top angle end of the hinged plate 1142 is hinged and rotatable, therefore, the driving rod 1141 pushes the hinged plate 1142 to rotate clockwise through the middle angle end hinged to the hinged plate 1142. Furthermore, the bottom angle end of the hinged plate 1142 slidingly connected in the vertical sliding groove 1131 slides upward along the sliding groove while pushing the wind plate 113 to move horizontally towards the wind channel 115. As a result, the air outlet formed between the wind plate 113 and the wind channel 115 becomes smaller, thereby increasing the suction pressure in the first cavity 111. Pulling the driving rod 1141 in the reverse direction will increase the distance between the wind plate 113 and the wind channel 115, achieving the effect of reducing the suction pressure in the first cavity 111. In this embodiment, an improved structure of the air separator 210 is also provided. Its main change lies in that: a convex platform 1113 is formed in the first cavity 111. The convex platform 1113 is located inside the feed inlet 1111, and the side of the convex platform 1113 extends a predetermined distance towards the direction of the wind channel 115. A slit wind channel 116 is formed between the side of the convex platform 1113 and the wind plate 113. The formation of the slit wind channel 116 by the convex platform 1113 can greatly improve the suction force. On the one hand, it improves the suction separation effect of the light impurities in the raw rice below the slit wind channel 116. At the same time, it can effectively save energy consumption and reduce costs.

[0028] The storage station 300 mainly includes a storage bin 310 and a third elevator 320. The storage bin 310 is connected to the second elevator 220. The preliminarily screened rice falling from a predetermined height of the second elevator 220 enters the storage bin 310, and the preliminarily screened rice is transferred out of the storage bin 310 through the connected third elevator 320 to the color sorting station 400. The storage bin 310 is mainly used to ensure the continuity and stability of the operation. In this embodiment, there are multiple groups of storage bins 310, and the multiple groups of storage bins 310 are arranged side by side. At the same time, a first scraper conveyor 330 and a second scraper conveyor 340 are also adaptively arranged in the storage station 300. The scraper of the first scraper conveyor 330 is located above the storage bin 310. The preliminarily screened rice lifted to the predetermined height of the second elevator 220 scatters onto the scraper of the first scraper conveyor 340, and the first scraper conveyor 330 distributes the preliminarily screened rice on its scraper into the storage bin 310 below. The preliminarily screened rice in each storage bin 310 falls onto the scraper of the second scraper conveyor 340 located below through an independently controlled discharge port, and the second scraper conveyor 340 scrapes the preliminarily screened rice on its scraper into the third elevator 320. By setting multiple groups of storage bins and the adapted scraper conveyors, the storage capacity of the preliminarily screened rice can be further improved, and the continuity of the production line operation can be ensured.

[0029] The color sorting station 400 mainly includes an intermediate bin 410 and a color sorter 420. The third elevator 320 is connected to the intermediate bin 410. The preliminarily screened rice lifted to a predetermined height by the third elevator 320 falls into the intermediate bin 410. The feed inlet of the color sorter 420 is connected to the discharge outlet of the intermediate bin 410. After the preliminarily screened rice enters the color sorter 420, the different-color granular impurities in the preliminarily screened rice are automatically sorted through the optoelectronic detection technology. The different-color granular impurities mainly include other particulate matters different from the color of rice, such as stones. Through the color sorter 420, the heavy granular impurities in the preliminarily screened rice can be further removed, forming medium-screened rice with a higher purity. The so-called heavy granular impurities are mainly granular impurities with a density greater than that of rice, and it is difficult to remove them by the negative pressure adsorption method in the air separator 210. In this embodiment, the intermediate bin 410 and the color sorter 420 are set in groups and there are multiple groups. Taking 2 groups as an example, each group is adaptively provided with a third elevator 320. At this time, the number of third elevators 320 is 2. The discharge outlets of the 2 groups of color sorters 420 are commonly connected to a multi-way valve. The multi-way valve has a first channel 430 and a second channel 440. The first channel 430 is used to output the medium-screened rice, and the second channel 440 is used to communicate with the third elevator 320 to convey the medium-screened rice into the intermediate bin 410 again through the third elevator 320 and filter and screen it again through the color sorter 420 to further improve the purity of the medium-screened rice. According to the purity requirements, the screening can be cycled multiple times.

[0030] The fine screening and feeding station 500 mainly includes an air lock 510, a conveying pipe 520, and a Roots blower 530. The feed inlet of the air lock 510 is communicated with the discharge channel of the color sorter 420. The medium-screened rice after being screened by the color sorter 420 falls from the upper hopper of the air lock 510 between the blades and fills the spaces between the blades. The discharge outlet of the air lock 510 is communicated with the conveying pipe 520, and the medium-screened rice is discharged into the conveying pipe 520 by the rotation of the blades. The conveying pipe 520 is in an S shape as a whole, and is an S-shaped structural pipe that is horizontally stretched as a whole to a certain extent so that the upper and lower corners are obtuse angles. The outlet of the conveying pipe 520 is communicated with the feeding device of the rice cooking line, and the inlet of the conveying pipe 520 is communicated with the Roots blower 530. The connection port of the air lock 510 and the conveying pipe 520 is close to the Roots blower 530, so that the medium-screened rice entering the conveying pipe 520 obtains a relatively high initial velocity. After the two ends of the conveying pipe 520 are connected, it is in an upright shape, and its rice outlet is higher than its rice inlet. Starting the Roots blower 530 makes the conveying pipe 520 have a large positive pressure wind force from the inlet to the outlet. When the spaces between the blades of the air lock 510 are not filled with medium-screened rice grains, the positive pressure wind force cannot pass through this branch and continue upward through the blade structure. When the spaces between the blades of the air lock 510 are filled with medium-screened rice grains, the medium-screened rice grains are discharged into the conveying pipe 520 by rotation and are blown towards the outlet under the action of the high-pressure wind force generated by the Roots blower 530. During the process of the medium-screened rice being blown towards the outlet of the conveying pipe 520, when passing through the bend and entering the vertical flow channel, heavy particles such as stones with a density greater than that of rice fall and remain in the conveying pipe, thereby realizing the further screening and separation of heavy impurity particles. At the same time, due to the action of the positive pressure wind force, when the rice enters the device of the cooking line through the outlet, dust, powder, and light impurities not completely removed generated in the previous process can be further removed by the positive pressure, so that the medium-screened rice forms fine-screened rice and enters the device of the cooking line.

[0031] The self-heating rice rice fine screening production line provided by the present utility model changes the feeding unit using devices such as a tube chain conveyor into a positive pressure blowing feeding unit, greatly reducing the food processing and manufacturing cost. At the same time, while using the S-shaped blowing pipeline design to complete the feeding, it realizes the simultaneous screening of light and heavy impurities of the rice entering the cooking unit, maximizing the purity of the rice entering the cooking unit, reducing the impurities in the self-heating rice, and effectively improving the food quality and customer experience. In addition, the air separator with a vertical side-in air flow channel structure is adopted in the self-heating rice rice fine screening production line of the present utility model. Especially when forming the slit air duct mechanism, it can form a good adsorption effect on light impurities when the raw rice falls from the side inlet, while reducing the mis-aspiration amount of the raw rice grains, saving raw materials, and reducing costs.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0033] The specific embodiments of the present utility model have been described above. It should be understood that the present utility model is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present utility model. Without conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

Claims

1. A self-heating rice fine screening production line, characterized in that: include: A feeding station (100) comprises a feeding box (110) and a first elevator (120), wherein the raw rice enters the first elevator (120) through the feeding box (110), and the first elevator (120) lifts the raw rice in portions to a predetermined height; The primary screening adsorption station (200) comprises an air selector (210) and a second elevator (220). The raw rice spilled from the first elevator (120) at a predetermined height falls into the air selector (210). The air selector (210) adsorbs light impurities in the raw rice by negative pressure and discharges them from the top. The primary screening rice formed after the light impurities are removed from the raw rice enters the second elevator (220) from the bottom of the air selector (210). A material storage station (300) comprises a material storage compartment (310) and a third elevator (320), wherein the pre-screened rice falls from the second elevator (220) at a predetermined height into the material storage compartment (310), and the material storage compartment (310) is connected to the third elevator (320); The color sorting station (400) includes an intermediate material chamber (410) and a color sorter (420). The pre-screened rice falls from the third elevator (320) to the intermediate material chamber (410) at a predetermined height. The color sorter (420) receives the pre-screened rice in the intermediate material chamber (410) and performs color sorting to remove impurities of different colors to form intermediate screened rice. The fine screening feeding station (500) comprises an air lock (510), a conveying pipe (520) and a Roots blower (530), wherein the conveying pipe (520) is in an S shape as a whole, the outlet of the conveying pipe (520) is higher than the inlet, the inlet of the conveying pipe (520) is connected to the Roots blower (530), the outlet of the conveying pipe (520) is used to connect to the feeding device of the rice cooking line, the air lock (510) is connected to the color sorter (420) to receive The medium-screened rice, the air lock (510) is connected to the conveying pipe (520) and is close to the Roots blower (530), the medium-screened rice rotating out of the air lock (510) enters the conveying pipe (520) and is blown to the outlet end of the conveying pipe (520) under the action of wind force, heavy impurities are separated when passing through the vertical section of the conveying pipe (520), and light impurities are separated under the action of positive pressure wind force, forming fine-screened rice that enters the feeding device of the rice cooking line.

2. The self-heating rice fine screening production line according to claim 1, characterized in that: The air selector (210) comprises a first cavity (111), a second cavity (112), an air plate (113) and an adjusting mechanism (114); a feed port (1111) is arranged on the outer side of the first cavity (111); a discharge port (1112) is arranged at the bottom of the first cavity (111); and a negative pressure adsorption port (1121) is arranged at the top of the second cavity (112); The first cavity (111) and the second cavity (112) are arranged adjacent to each other, and partitions between the first cavity (111) and the second cavity (112) form an air duct (115). The air plate (113) is located in the second cavity (112) and is connected to the regulating mechanism (114). The air plate (113) is moved closer to or farther away from the air duct (115) by a predetermined distance through the regulating mechanism (114).

3. The self-heating rice fine screening production line according to claim 2 is characterized in that, A boss (1113) is formed on the inner side of the feed port (1111), and the boss (1113) and the air duct (115) form a slit air duct (116).

4. The self-heating rice fine screening production line according to claim 2 or 3, characterized in that: The adjustment mechanism (114) includes a plurality of adjustment components, and the adjustment components include a driving rod (1141) and a hinged plate (1142). The hinged plate (1142) is a triangular plate. The top corner end of the hinged plate (1142) is hinged in the second cavity (112). One end of the driving rod (1141) enters the second cavity (112) and is hinged to the middle corner end of the hinged plate (1142). The wind plate (113) is provided with a vertical sliding groove (1131). The bottom corner end of the hinged plate (1142) is slidably connected in the vertical sliding groove (1131).

5. The self-heating rice fine screening production line according to claim 1 is characterized in that: The material storage bins (310) are multiple groups, and the multiple groups of material storage bins (310) are arranged side by side. The material storage station (300) further comprises a first scraper (330) and a second scraper (340). The first scraper (330) receives the pre-screened rice from the second elevator (220) and distributes it to each of the material storage bins (310). The second scraper (340) receives the pre-screened rice from the material storage bins (310) and transports it to the third elevator (320).

6. The self-heating rice fine screening production line according to claim 1 is characterized in that: The color sorting station (400) includes a plurality of groups of the intermediate material bins (410) and the color sorters (420), and the third elevators (320) are a plurality of groups. The discharge ports of the plurality of groups of the color sorters (420) are merged to form a first material channel (430) and a second material channel (440). The first material channel (430) is connected to the air lock (510), and the second material channel (440) is connected to the third elevator (320). The medium-screened rice color-sorted by the color sorter (420) is color-sorted again after passing through the third elevator (320).

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