A device for killing insects and sterilizing grains

Abstract

The utility model discloses a kind of grain insecticidal sterilization device, including sequentially communicating feed bin, feed valve, heating insecticidal sterilization stirring part, unloading valve, dehydration part and drying part, drying part includes vibration motor and vibration sieve plate driven by vibration motor, for conveying grain from dehydration part, vibration sieve plate is arranged in the chamber of drying part, drying part is provided with discharge port, the end of vibration sieve plate is communicated with discharge port;The conveying surface of vibration sieve plate is multistage step shape;Scraper is arranged on vibration sieve plate, and there is clearance between the conveying surface of scraper and vibration sieve plate, which controls the thickness of grain on conveying surface;The internal chamber of drying part and hot air part communication is divided into multiple hot air zones, so as to segment drying for grain on different areas of vibration sieve plate;Through the above mode, the utility model can solve the problem that grain is not evenly dried, easy to cake and re-moisture after insecticidal sterilization, improve drying efficiency, ensure quality stability and prevent mildew effect.

Description

Technical Field

[0001] This utility model relates to the field of grain processing and storage equipment technology, and in particular to a grain insecticidal and sterilizing device. Background Technology

[0002] In the field of grain storage and processing technology, especially in the treatment of brown rice for pests and bacteria, traditional methods typically involve storing unhulled paddy rice rather than hulled brown rice. This is because brown rice is more susceptible to pests, mold, and quality deterioration during storage. Although brown rice has higher nutritional value, its lack of a protective husk makes it more vulnerable to microbial contamination and enzymatic oxidation, leading to decreased freshness and deterioration in edible quality. Furthermore, brown rice storage requires specific environmental conditions, occupies large storage space, and incurs high transportation costs, further limiting its large-scale storage and application.

[0003] To address the aforementioned issues, existing technologies include devices that utilize superheated steam for insect and bacteria sterilization. For example, high-temperature steam treatment of brown rice kills insect eggs, adult insects, and surface microorganisms, and inhibits enzyme activity, as illustrated in Chinese invention patent application CN116528913A. These devices typically include basic processes such as feeding, steam treatment, dehydration, and drying, which improves the storage stability and edible quality of brown rice to some extent. However, existing devices still have certain shortcomings in the drying process, such as uneven drying, easy clumping, high energy consumption, and the brown rice easily becoming damp after drying, affecting overall processing efficiency and finished product quality. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a grain insecticidal and sterilizing device that can solve the problems of uneven drying, easy clumping and moisture reabsorption of grains after insecticidal and sterilizing, thereby improving drying efficiency, ensuring stable quality and preventing mold growth.

[0005] To solve the above-mentioned technical problems, the present invention provides a grain insecticidal and sterilizing device, comprising a feeding hopper, a feeding valve, a heating insecticidal and sterilizing stirring section, a discharge valve, a dehydration section, and a drying section connected in sequence. The drying section is connected to a hot air section that provides a heat source for it. The drying section includes a vibrating motor and a vibrating screen plate driven by the vibrating motor for conveying grain from the dehydration section. The vibrating screen plate is disposed in the chamber of the drying section, and an outlet is provided on the drying section. The end of the vibrating screen plate is connected to the outlet. The conveying surface of the vibrating screen plate is multi-step, which is used to tumble and spread the grain during the conveying process. Scrapers are arranged on the vibrating screen plate, and a gap is left between the scrapers and the conveying surface of the vibrating screen plate to control the thickness of the grain on the conveying surface. The internal chamber of the drying section connected to the hot air section is divided into multiple hot air zones. The hot air section includes multiple hot air blowers with different temperatures, and the multiple hot air zones are connected to the corresponding hot air blowers so as to dry the grain in different areas of the vibrating screen plate in segments.

[0006] Preferably, the conveying surface includes a first conveying surface, a second conveying surface, and a third conveying surface with sequentially decreasing horizontal heights, thereby making the conveying surface of the vibrating screen plate stepped.

[0007] Preferably, the scraper includes a first scraper, a second scraper, and a third scraper. The first scraper is arranged above the first conveying surface and forms a first gap with the first conveying surface. The second scraper is arranged above the second conveying surface and forms a second gap with the second conveying surface. The third scraper is arranged above the third conveying surface and forms a third gap with the third conveying surface.

[0008] Preferably, the hot air zone includes a first hot air zone and a second hot air zone, a first conveying surface and a second conveying surface are arranged above the first hot air zone, a third conveying surface is arranged above the second hot air zone, and the hot air unit includes a high-temperature hot air blower and a low-temperature hot air blower, the high-temperature hot air blower is connected to the first hot air zone, and the low-temperature hot air blower is connected to the second hot air zone.

[0009] Preferably, the first hot air zone is provided with multiple first air dampers, which control the flow rate of high-temperature hot air blown out by the high-temperature hot air blower into the first hot air zone, and the second hot air zone is provided with multiple second air dampers, which control the flow rate of low-temperature hot air blown out by the low-temperature hot air blown out by the low-temperature hot air blower into the second hot air zone.

[0010] Preferably, the drying section is connected to an exhaust section, which includes a hot air inlet and a hot air outlet. The hot air inlet is located above the conveying surface, and the hot air outlet is located on one side of the exhaust section and is connected to the hot air inlet.

[0011] The beneficial effects of this invention are as follows: The multi-stage stepped design of the vibrating screen plate in the drying section allows the brown rice to be fully tumbled and spread out during transport, effectively preventing material accumulation and clumping, and significantly improving the uniformity of hot air contact with the material and drying efficiency. The scraper structure allows for precise control of the thickness of the brown rice spread in each transport section, thus achieving refined control of the drying process. By separating the drying hot air zones and connecting them with hot air blowers at different temperatures, the brown rice can be dried in sections and segments. The initial high-temperature rapid dehydration followed by the subsequent low-temperature slow cooling effectively solves the technical problem of brown rice easily becoming damp and having unstable quality due to excessive temperature differences after drying. The damper design further optimizes the flexibility of hot air flow and temperature control. The overall structural design is reasonable, effectively fulfilling the core functions of insecticidal and sterilization while significantly improving the drying effect, storage stability, and final product's edible quality of the brown rice, demonstrating high practical value and economic benefits. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is a schematic diagram of the overall structure of this utility model from another perspective; Figure 3 This is a cross-sectional view of the present invention; Figure 4 yes Figure 3 Enlarged schematic diagram of section A in the middle.

[0013] The components in the attached diagram are labeled as follows: 11. Feed hopper; 12. Feed valve; 13. Heating, insecticidal, sterilizing, and mixing section; 14. Discharge valve; 15. Dehydration section; 16. Drying section; 161. Vibrating motor; 162. Vibrating screen plate; 1621. First conveying surface; 1622. Second conveying surface; 1623. Third conveying surface; 163. Discharge port; 164. Exhaust section; 1641. Hot air inlet; 1642. Hot air outlet; 17. Hot air section; 171. High-temperature hot air blower; 172. Low-temperature hot air blower; 21. First scraper; 22. Second scraper; 23. Third scraper; 31. First hot air zone; 32. Second hot air zone; 51. First air damper; 52. Second air damper. Detailed Implementation

[0014] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0019] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0020] Unless otherwise specified, physical quantities in formulas should be understood as basic quantities of SI base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0021] Example: refer to Figures 1-4A grain insecticide and sterilization device includes a feeding hopper 11, a feeding valve 12, a heating, insecticide, sterilization, and stirring section 13, a discharge valve 14, a dehydration section 15, and a drying section 16 connected in sequence. The drying section 16 is connected to a hot air section 17 that provides a heat source for it. The drying section 16 includes a vibrating motor 161 and a vibrating screen plate 162 driven by the vibrating motor 161, used to convey grain from the dehydration section 15. The vibrating screen plate 162 is installed inside the drying section 16, and the vibrating motor 161 is installed on the outer shell of the drying section 16. The drying section 16 has a discharge port 163, and the end of the vibrating screen plate 162 is connected to the discharge port 163, so that the treated grain is discharged through the discharge port 163, ending the insecticide and sterilization treatment of the grain. The grain can be brown rice, but this device is not limited to processing brown rice; it is also suitable for other grains that require insecticide and sterilization, such as wheat and corn.

[0022] refer to Figure 4 To improve the drying effect on brown rice, the conveying surface of the vibrating screen plate 162 is multi-stepped, allowing the brown rice to tumble and spread out as it passes over the steps during conveying, thus making it easier to disperse. The conveying surface includes a first conveying surface 1621, a second conveying surface 1622, and a third conveying surface 1623, which decrease in horizontal height sequentially, thus making the conveying surface of the vibrating screen plate 162 step-like. The length of the third conveying surface 1623 is greater than the length of the first conveying surface 1621 and / or the second conveying surface 1622.

[0023] refer to Figures 1-4 The conveying surface of the vibrating screen plate 162 is provided with screen holes, so that while the vibrating motor 161 drives the vibrating screen plate 162 to convey brown rice, the small foreign objects mixed in the brown rice fall through the vibrating screen plate 162 into the foreign object receiving part at the bottom of the drying part 16.

[0024] refer to Figure 4To further improve the drying effect of brown rice and control the thickness of the brown rice accumulation on the conveying surface, a scraper is arranged on the vibrating screen plate 162. A gap is left between the scraper and the conveying surface of the vibrating screen plate 162 to control the thickness of the brown rice on the conveying surface. By controlling the size of this gap, the thickness of the brown rice accumulation on the conveying surface can be controlled. Even when necessary, the opening and closing degree of the scraper can be minimized or closed with the conveying surface, thereby better controlling the degree of drying of the brown rice according to the on-site conditions. To control the angle and position of the scraper, a rotating shaft can be rotatably connected to the outer shell of the drying section 16, and the scraper can be fixedly connected to the shaft. The opening and closing angle of the scraper can be controlled by rotating the shaft. The scraper includes a first scraper 21, a second scraper 22, and a third scraper 23. The first scraper 21 is arranged above the first conveying surface 1621 and forms a first gap with the first conveying surface 1621. The second scraper 22 is arranged above the second conveying surface 1622 and forms a second gap with the second conveying surface 1622. The third scraper 23 is arranged above the third conveying surface 1623 and forms a third gap with the third conveying surface 1623. Thus, by controlling the size and even the closing state of the first gap, the second gap, and the third gap, the drying of brown rice on the first conveying surface 1621, the second conveying surface 1622, and the third conveying surface 1623 can be controlled.

[0025] refer to Figures 1-4 The internal chamber of the drying section 16, which is connected to the hot air section 17, is divided into multiple hot air zones. The hot air section 17 includes multiple hot air blowers with different temperatures. The multiple hot air zones are connected to the corresponding hot air blowers so as to dry the brown rice in different areas on the vibrating screen plate 162 in sections. This allows the brown rice to cool slowly in the drying section 16, preventing it from becoming damp and moldy when it comes into contact with external moisture. Specifically, the hot air zone includes a first hot air zone 31 and a second hot air zone 32. A first conveying surface 1621 and a second conveying surface 1622 are arranged above the first hot air zone 31, and a third conveying surface 1623 is arranged above the second hot air zone 32. The hot air unit 17 includes a high-temperature hot air blower 171 and a low-temperature hot air blower 172. The high-temperature hot air blower 171 is connected to the first hot air zone 31, and the low-temperature hot air blower 172 is connected to the second hot air zone 32. Thus, the high-temperature hot air passes through the sieve holes at the bottom of the first and second conveying surfaces 1621 and 1622, contacting the brown rice on the first and second conveying surfaces 1621 and 1622, and rapidly baking the brown rice at high temperature, achieving pre-drying of the brown rice. Conversely, the low-temperature hot air passes through the sieve holes at the bottom of the third conveying surface 1623, contacting the brown rice on the third conveying surface 1623, achieving both baking and slow cooling of the brown rice. To prevent the brown rice from absorbing moisture from the external environment and becoming moldy when it comes into contact with the external environment due to its high temperature when it is discharged from the drying section 16.

[0026] refer to Figure 4 Multiple first air dampers 51 are rotatably connected in the first hot air zone 31. The first air dampers 51 control the flow rate of the high-temperature hot air blown out by the high-temperature hot air blower 171 into the first hot air zone 31, thereby controlling the amount of hot air that comes into contact with the brown rice on the first conveying surface 1621 and the second conveying surface 1622 after passing through the sieve holes. This makes it easier to control the amount of high-temperature hot air in contact with the brown rice by rotating the first air dampers 51. Multiple second air dampers 52 are rotatably connected in the second hot air zone 32. The second air dampers 52 control the flow rate of the low-temperature hot air blown out by the low-temperature hot air blower 172 into the second hot air zone 32, thereby controlling the amount of low-temperature hot air that comes into contact with the brown rice on the third conveying surface 1623 after passing through the sieve holes. This makes it easier to control the amount of low-temperature hot air in contact with the brown rice by rotating the second air dampers 52.

[0027] refer to Figures 1-4 The drying section 16 is connected to the exhaust section 164, which includes a hot air inlet 1641 and a hot air outlet 1642. The hot air inlet 1641 covers the top of the conveying surface, and the hot air outlet 1642 is opened on one side of the exhaust section 164 and communicates with the hot air inlet 1641. Thus, the hot air blown out of the hot air zone enters the exhaust section 164 and is discharged after passing through the vibrating screen plate 162.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A grain insecticidal and sterilizing device, comprising a feeding hopper (11), a feeding valve (12), a heating insecticidal and sterilizing stirring section (13), a discharge valve (14), a dehydration section (15), and a drying section (16) connected in sequence, wherein the drying section (16) is connected to a hot air section (17) that provides a heat source thereto, characterized in that, The drying section (16) includes a vibration motor (161) and a vibrating screen plate (162) driven by the vibration motor (161) for conveying grains from the dehydration section (15). The vibrating screen plate (162) is disposed in the chamber of the drying section (16). The drying section (16) is provided with a discharge port (163). The end of the vibrating screen plate (162) is connected to the discharge port (163). The conveying surface of the vibrating screen plate (162) is multi-step, which is used to make the grain roll and spread out during the conveying process; A scraper is arranged on the vibrating screen plate (162), and a gap is left between the scraper and the conveying surface of the vibrating screen plate (162) to control the thickness of the grain on the conveying surface. The internal chamber of the drying section (16) and the hot air section (17) is divided into multiple hot air zones. The hot air section (17) includes multiple hot air blowers with different temperatures. The multiple hot air zones are connected to the corresponding hot air blowers so as to dry the grains in different areas on the vibrating screen plate (162) in segments.

2. The grain insecticide and sterilizer according to claim 1, characterized in that: The conveying surface includes a first conveying surface (1621), a second conveying surface (1622), and a third conveying surface (1623) with sequentially decreasing horizontal heights, thereby making the conveying surface of the vibrating screen plate (162) stepped.

3. The grain insecticide and sterilizer according to claim 2, characterized in that: The scraper includes a first scraper (21), a second scraper (22) and a third scraper (23). The first scraper (21) is arranged above the first conveying surface (1621) and forms a first gap with the first conveying surface (1621). The second scraper (22) is arranged above the second conveying surface (1622) and forms a second gap with the second conveying surface (1622). The third scraper (23) is arranged above the third conveying surface (1623) and forms a third gap with the third conveying surface (1623).

4. The grain insecticide and sterilizer according to claim 2, characterized in that: The hot air zone includes a first hot air zone (31) and a second hot air zone (32). The first conveying surface (1621) and the second conveying surface (1622) are arranged above the first hot air zone (31), and the third conveying surface (1623) is arranged above the second hot air zone (32). The hot air unit (17) includes a high-temperature hot air blower (171) and a low-temperature hot air blower (172). The high-temperature hot air blower (171) is connected to the first hot air zone (31), and the low-temperature hot air blower (172) is connected to the second hot air zone (32).

5. The grain insecticide and sterilizer according to claim 4, characterized in that: The first hot air zone (31) is provided with a plurality of first air dampers (51), which control the flow rate of high-temperature hot air blown out by the high-temperature hot air blower (171) into the first hot air zone (31). The second hot air zone (32) is provided with a plurality of second air dampers (52), which control the flow rate of low-temperature hot air blown out by the low-temperature hot air blower (172) into the second hot air zone (32).

6. A grain insecticide and sterilizer according to any one of claims 1-5, characterized in that: The drying section (16) is connected to an exhaust section (164), which includes a hot air inlet (1641) and a hot air outlet (1642). The hot air inlet (1641) covers the conveying surface, and the hot air outlet (1642) is located on one side of the exhaust section (164) and is connected to the hot air inlet (1641).

7. The grain insecticide and sterilizer according to claim 1, characterized in that: The grain in question is brown rice.

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