Conveying device for rice processing

Abstract

The invention relates to the technical field of rice conveying, and discloses a conveying device for rice processing, comprising: a conveying bracket on which a rice grain conveying dust collection mechanism is arranged; the rice grain conveying dust collection mechanism comprises a dust collection outer pipe, wherein the inner wall of the dust collection outer pipe is sequentially divided into a front-section dust collection area, a middle-section dust collection area and a rear-section dust collection area in the axial direction; the material conveying inner pipe is coaxially arranged in the dust collection outer pipe, and an annular dust collection space of 1-2 cm is formed between the material conveying inner pipe and the dust collection outer pipe; the cross section of the inner conveying pipe is composed of an upper part and a lower part, the lower half part is of a mesh-free solid structure, the upper half part is a dust passing mesh cover, rhombic meshes with the diameter being 0.5-1.2 mm are formed in the dust passing mesh cover, and the diameter of the rhombic meshes is smaller than the minimum grain diameter of rice grains. The dust collection ends of the three groups of independent suction assemblies are respectively connected with the front, middle and rear section dust collection areas; the dust collection area is divided into the front section, the middle section and the rear section and is independently controlled, the suction force is gradually reduced from the feeding end to the discharging end in a gradient mode, and the objective rule that the dust content is gradually reduced in the conveying process of rice grains is perfectly matched.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rice conveying, more particularly, it relates to a conveying device for rice processing. BACKGROUND

[0002] In the rice processing, from the husking of paddy to the packaging of finished rice, it needs to go through multiple conveying links. In these conveying links, a large amount of dust will be generated due to the friction and collision between the rice grains and the impurities such as bran and broken rice attached to the surface of the rice grains.

[0003] The conventional dust collection method often uses a single suction force, which is difficult to adapt to the situation that the dust concentration is different in different areas during the conveying process. In the area with high dust concentration, the suction force may be insufficient, resulting in incomplete dust removal. Therefore, we propose a conveying device for rice processing. SUMMARY

[0004] The present application provides a conveying device for rice processing, which solves the technical problem that the dust collection method in the related art often uses a single suction force, which is difficult to adapt to the situation that the dust concentration is different in different areas during the conveying process. In the area with high dust concentration, the suction force may be insufficient, resulting in incomplete dust removal.

[0005] The present application provides a conveying device for rice processing, which includes: a conveying support, on which a rice grain conveying and dust collection mechanism is arranged;

[0006] The rice grain conveying and dust collection mechanism includes:

[0007] A dust collection outer pipe, the inner wall of which is sequentially divided into a front dust collection section, a middle dust collection section and a rear dust collection section along the axial direction; a material conveying inner pipe, which is coaxially arranged in the dust collection outer pipe, and a ring-shaped dust collection space of 1-2 cm is formed between the two;

[0008] The cross section of the material conveying inner pipe is composed of two parts: the lower half is a solid structure without mesh holes, and the upper half is a dust passing net cover, on which rhombic mesh holes with a diameter of 0.5-1.2 mm are arranged, and the hole diameter is smaller than the minimum particle diameter of the rice grains;

[0009] Three groups of independent suction force assemblies, the dust collection ends of which are connected to the front, middle and rear dust collection sections, respectively;

[0010] A blowing and spraying assembly, the jetting ends of which are distributed along the axial direction of the lower wall of the material conveying inner pipe;

[0011] Sensors are arranged corresponding to each dust collection section to monitor the negative pressure value in real time;

[0012] When the negative pressure value of any section exceeds the preset threshold value, the corresponding suction force assembly is triggered to perform pulse dust collection adjustment, and the blowing and spraying assembly is linked to increase the jetting amount, forming a "blowing-suction" cooperative dust removal mechanism;

[0013] The intelligent control system receives sensor data through the Internet of Things module, dynamically adjusts the suction force parameters of the three-section suction assembly and the air blowing frequency of the blowing assembly, and realizes real-time control of the dust concentration in the conveying process and automatic early warning of the blocking state.

[0014] Further, a conveying propeller is arranged to rotate in the inner conveying pipe, and the discharge end of the conveying propeller is connected to the driving motor assembly to drive the rice conveying.

[0015] Further, the feeding end of the dust suction outer pipe is provided with a feeding hopper, the discharge port of the feeding hopper penetrates through the dust suction outer pipe and is connected to the feeding end of the inner conveying pipe, the end of the dust suction outer pipe away from the feeding hopper is provided with a discharge cylinder, and the discharge cylinder penetrates through the bottom of the dust suction outer pipe and is connected to the discharge end of the inner conveying pipe.

[0016] Further, the suction assembly includes three centrifugal dust suction machines, the dust suction ends of the three centrifugal dust suction machines are connected to the front, middle and rear suction areas through the dust suction main pipe, respectively, the dust discharge ends are provided with dust suction bags, the three centrifugal dust suction machines are fixed to the conveying support through the transverse fixing plate, and the suction force decreases from the feeding end to the discharge end.

[0017] Further, the blowing assembly includes a gas supply pump, the gas discharge end of the gas supply pump extends to the annular dust suction space through a vertical blowing pipe and is wired along the lower wall of the inner conveying pipe, and the vertical blowing pipe is provided with a plurality of air jet heads arranged in an array and blowing into the inner conveying pipe.

[0018] Further, a plurality of partition seats are arranged on the dust passing net cover, and the dust suction space is divided into three independent areas corresponding to the front, middle and rear sections.

[0019] Further, the dust passing net cover and the lower half of the inner conveying pipe are flexibly connected through a split film, the outer walls of the two are provided with elastic sheets, the elastic sheets of the same section are connected through a connecting plate, a vibrator is arranged on the connecting plate, and the vibrator is controlled according to the negative pressure data of the sensor to drive the dust passing net cover to shake to remove the blocked dust.

[0020] Further, a plurality of outer protective covers are arranged on the outer wall of the dust suction outer pipe, the vibrator is located in the outer protective cover and does not contact the inner wall of the outer protective cover, and a vibration space is provided.

[0021] The beneficial effects of the present application are as follows:

[0022] By dividing the dust suction area into three sections of front, middle and rear and independently controlling the three sections, and by decreasing the suction force from the feeding end to the discharge end, the present application perfectly matches the objective law that the dust content gradually decreases during the conveying process of rice, avoids the disadvantages of traditional single-point dust suction, such as insufficient suction force in the front section and excessive suction force in the rear section, significantly improves the dust removal efficiency, and avoids unnecessary energy waste.

[0023] The linkage of the bottom blowing assembly and the top suction assembly, when detecting abnormal negative pressure in a certain section, not only enhances the suction force, but also synchronously enhances the blowing below the region. This "blowing up" from the lower part of the rice layer and "sucking away" from the upper part of the coordinated mode can effectively break the attachment and accumulation of dust at the mesh, and significantly reduce the mesh blockage problem caused by simply relying on negative pressure suction. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the overall structure schematic diagram of the present application;

[0025] Figure 2 is the dust suction outer tube structure schematic diagram of the present application;

[0026] Figure 3 is the dust suction outer tube structure schematic diagram of the present application; Figure 2 is the dust suction outer tube structure schematic diagram of the present application;

[0027] Figure 4 is the dust suction outer tube structure schematic diagram of the present application;

[0028] Figure 5 is the dust suction outer tube structure schematic diagram of the present application;

[0029] Figure 6 is the dust suction outer tube structure schematic diagram of the present application;

[0030] Figure 7 is the dust suction outer tube structure schematic diagram of the present application; Figure 6 is the dust suction outer tube structure schematic diagram of the present application;

[0031] In the figure: 11, conveying support; 12, centrifugal dust suction machine; 13, driving motor assembly; 14, feeding hopper; 15, discharging cylinder; 16, transverse plate; 17, dust suction bag; 2, rice conveying and dust suction mechanism; 21, dust suction outer tube; 22, dust suction main tube; 23, conveying inner tube; 24, outer protective cover; 25, vertical blowing pipe; 26, air supply pump; 27, conveying propeller; 28, dust passing cover; 29, separation seat; 31, connecting plate; 32, vibrator; 33, sensor; 34, elastic sheet; 35, divided rubber sheet. DETAILED DESCRIPTION

[0032] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is merely meant to provide a better understanding of the subject matter described herein and can be changed in function and arrangement without departing from the scope of the present description. Various processes or components can be omitted, substituted, or added according to desired implementations. Additionally, features described with respect to some examples can be combined in other examples.

[0033] As Figures 1-7As shown, a conveying device for rice processing includes: a conveying support 11, on which a rice grain conveying and dust collection mechanism 2 is installed;

[0034] The rice grain conveying and dust collection mechanism 2 includes:

[0035] The outer suction pipe 21 has its inner wall divided into a front suction area, a middle suction area, and a rear suction area along the axial direction; the inner conveying pipe 23 is coaxially arranged inside the outer suction pipe 21, forming a 1-2cm annular suction space between the two.

[0036] The cross-section of the inner conveying tube 23 consists of two parts: the lower half is a solid structure without mesh, and the upper half is a dust-passing mesh cover 28, on which diamond-shaped mesh holes with a diameter of 0.5-1.2mm are opened and the hole diameter is smaller than the smallest particle size of rice.

[0037] Three independent suction components, with the suction end connected to the front, middle and rear suction areas respectively;

[0038] The jetting assembly has jetting ends distributed axially along the lower wall of the inner conveying pipe 23.

[0039] Sensor 33 is installed in each dust collection zone to monitor the negative pressure value in real time;

[0040] When the negative pressure value of any segment exceeds the preset threshold, the corresponding suction component is triggered to perform pulse suction adjustment, and the blow-jet component is linked to increase the jet volume, forming a "blow-suction" coordinated dust removal mechanism;

[0041] The intelligent control system receives data from sensor 33 through the Internet of Things module, dynamically adjusts the suction parameters of the three-stage suction components and the jet frequency of the blower components, and realizes real-time control of dust concentration and automatic early warning of blockage during the conveying process.

[0042] A conveying propeller 27 is rotatably installed inside the inner conveying tube 23, and its discharge end is connected to the drive motor assembly 13 to drive the conveying of rice grains.

[0043] The suction pipe 21 is provided with a feeding hopper 14 at the feeding end. The discharge port of the feeding hopper 14 passes through the suction pipe 21 and is connected to the feeding end of the conveying pipe 23. The suction pipe 21 is provided with a discharge cylinder 15 at the end away from the feeding hopper 14. The discharge cylinder 15 passes through the bottom of the suction pipe 21 and is connected to the discharge end of the conveying pipe 23.

[0044] The suction assembly includes three centrifugal vacuum cleaners 12, whose suction ends are connected to the front, middle and rear suction areas respectively through the suction main tube 22, and the dust discharge end is equipped with a dust bag 17. The three centrifugal vacuum cleaners 12 are fixed to the conveying bracket 11 by the horizontal mounting plate 16, and the suction power decreases from the feeding end to the discharging end.

[0045] The blowing and spraying assembly includes an air supply pump 26, whose air outlet extends through a vertical spray pipe 25 to the annular dust collection space and runs along the lower wall of the inner conveying pipe 23. Air jets are arrayed on the vertical spray pipe 25 and spray into the interior of the inner conveying pipe 23.

[0046] Multiple partitions 29 are provided on the dust filter 28 to divide the dust collection space into three independent areas corresponding to the front, middle and rear sections.

[0047] The dust filter 28 and the lower half of the conveying inner tube 23 are flexibly connected by a dividing film 35. Elastic sheets 34 are provided on the outer walls of the two. The elastic sheets 34 in the same section are connected by a connecting plate 31. A vibrator 32 is provided on the connecting plate 31. The vibrator 32 is controlled according to the negative pressure data of the sensor 33 to drive the dust filter 28 to shake to remove the clogging dust.

[0048] Multiple outer protective covers 24 are provided on the outer wall of the suction tube 21, and the vibrator 32 is located inside them without contacting the inner wall of the outer protective cover 24, providing a vibration space.

[0049] Rice grain transport and establishment of basic airflow field:

[0050] Rice grains enter the inner conveying pipe 23 from the feed hopper 14. Upon startup, the drive motor assembly 13 drives the conveying propeller 27 to rotate, smoothly conveying the rice grains towards the discharge cylinder 15. Simultaneously, the system initializes.

[0051] The blowing and spraying assembly: When the air pump 26 is activated, the airflow passes through the vertical spray pipe 25 and the jet nozzle on it, and is sprayed upward from the lower wall of the inner conveying pipe 23 at a specific angle and pressure. This airflow has two main functions: first, it creates a certain "air cushion" effect on the rice grains, reducing the friction and damage between the rice grains and the pipe wall; second, it lifts the dust mixed in with the rice grains and raised by the conveying process, making it easier for them to approach the dust filter 28 above.

[0052] Suction components: Three centrifugal vacuum cleaners 12 start working according to preset parameters (usually set to the strongest suction in the front section, the second strongest in the middle section, and the weakest in the rear section, for example: front section -2500Pa, middle section -2000Pa, rear section -1500Pa), forming a stable negative pressure field in the annular suction space between the outer suction pipe 21 and the inner material conveying pipe 23.

[0053] Segmented dynamic dust collection combined with "blowing-suction" synergy: During the conveying process, the dust (mainly bran powder, broken particles, etc.) adhering to the inside and surface of the rice grains is separated and lifted by the spiral agitation and the blowing of the bottom airflow. Due to the diamond-shaped mesh of the dust filter 28 (pore diameter 0.5-1.2mm, much smaller than the smallest particle size of rice, for example, the smallest particle size of typical japonica rice is about 3mm), the rice grains are blocked in the inner conveying tube 23, while the dust particles smaller than the mesh size are sucked into the mesh under the action of negative pressure in the dust collection space.

[0054] Sensor 33 Real-time monitoring: Sensor 33 installed in the front, middle and rear suction spaces continuously monitors the negative pressure value of the area, P1, P2 and P3.

[0055] Intelligent Feedback and Adjustment: The intelligent control system receives this pressure data via an IoT module. The system presets the normal negative pressure threshold range for each segment (e.g., the threshold range for the first segment is -2300Pa to -2700Pa). When the impurity content of the rice grains is high or the dust concentration suddenly increases, a large amount of dust is sucked in, causing a temporary decrease in the mesh permeability, thereby increasing the absolute value of the actual negative pressure in that suction space, with P1 changing from -2500Pa to -2900Pa.

[0056] Triggering condition: Once the negative pressure value detected by any sensor 33 exceeds the preset threshold limit, that is, the absolute value of the negative pressure is too large, the system determines that the dust load in that section is too high or there is a preliminary blockage.

[0057] Perform the following actions:

[0058] Pulse suction: The intelligent control system immediately sends a command to the centrifugal vacuum cleaner 12 in the corresponding section, so that it increases its power in a short time (such as 0.5-2 seconds) to perform strong pulse suction (for example, instantly increase the suction power to -3500Pa) to quickly suck up the accumulated dust.

[0059] Enhanced blowing and spraying linkage: Simultaneously, the system controls the air supply pump 26 to increase the spray frequency and / or pressure of the jet nozzles on the vertical spray pipe 25 below the corresponding area, forming a stronger upward airflow. This "blow-suction synergy" mechanism can more effectively "blow up" and immediately "suck away" dust that is blocked at the mesh or attached to the bottom of the rice grains, greatly improving the instantaneous unblocking and dust removal efficiency.

[0060] Graded processing: This design, which allows for independent response by region, enables "graded and segmented processing" of dust. The rice grains with the most impurities are subjected to the strongest suction (e.g., average -2500Pa) and more frequent blow-suction synergy at the very beginning, where most of the dust is removed. The pre-treated rice grains then undergo finer dust removal at decreasing intensities (e.g., average -2000Pa, -1500Pa) in the middle and later stages, avoiding energy waste and excessive disturbance to the rice grains.

[0061] Active anti-clogging and cleaning mechanism: To prevent dust (especially fine chaff with slightly high moisture content) from adhering to and accumulating on the mesh of the dust filter 28 and causing continuous clogging, an active anti-clogging system is set up.

[0062] Vibration-based unblocking: When a sensor 33 detects an abnormal negative pressure that persists above a higher threshold (or recovers slowly after pulse processing), the intelligent control system activates the vibrator 32 for that section. The vibrator 32 transmits high-frequency, low-amplitude vibrations to the dust filter 28 via a connecting plate 31 and an elastic sheet 34. Because the dust filter 28 is flexibly connected to the lower section via a split film 35, it effectively generates vibrations, physically dislodging particles that clog the mesh. The vibration frequency can be adjusted according to the severity of the blockage; for example, intermittent vibration (e.g., 5 seconds of vibration every 10 minutes, amplitude 0.5 mm) is used for mild blockages, while continuous vibration (e.g., amplitude 1 mm) is used for severe blockages.

[0063] Safety protection: The vibrator 32 is placed inside the outer protective cover 24, which provides the space required for vibration and avoids interference with the external structure, ensuring operational safety and stability.

[0064] Intelligent Management and Early Warning: The entire operation is coordinated by an intelligent control system. The system not only processes real-time data and dynamically adjusts suction and jet parameters, but also learns the optimal dust removal parameter combinations for different types of rice from historical data. Through the IoT module, operators can remotely monitor information such as negative pressure at each stage, equipment status, and energy consumption. Based on negative pressure trends or the vibration frequency (32), the system can proactively detect a decline in filter cleanliness or equipment malfunctions, sending blockage warnings or maintenance prompts to the terminal, transforming passive maintenance into proactive maintenance.

[0065] High dust removal efficiency and energy saving, enabling precise operation: By dividing the dust collection area into three sections—front, middle, and rear—and controlling them independently, with suction power gradually decreasing from the inlet to the outlet, this design perfectly matches the objective law that "dust content gradually decreases" during the conveying of rice grains. Strong suction at the front end handles high-concentration dust, while weak suction at the rear end performs fine polishing, avoiding the drawbacks of traditional single-point dust collection where "sufficient suction at the front and excessive suction at the rear."

[0066] The unique "blow-suction synergy" mechanism effectively prevents mesh clogging: the bottom blowing component and the top suction component work together. When an abnormal negative pressure is detected in a certain area, the system not only increases suction but also simultaneously increases the blowing below that area. This synergistic mode, which "blows up" from the bottom of the rice grain layer and "sucks away" from the top, effectively breaks up the adhesion and accumulation of dust at the mesh, significantly reducing the mesh clogging problem that is easily caused by relying solely on negative pressure suction. The synergistic dust removal effect is even more significant for lighter rice bran dust.

[0067] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of the present embodiments, all of which are within the protection scope of the present embodiments.

Claims

1. A conveying device for rice processing, characterized in that, include: A conveying bracket (11) is provided with a rice grain conveying and dust collection mechanism (2). The rice grain conveying and dust collection mechanism (2) includes: The outer suction tube (21) has its inner wall divided into a front suction area, a middle suction area, and a rear suction area along the axial direction; the inner conveying tube (23) is coaxially arranged inside the outer suction tube (21), forming a 1-2cm annular suction space between the two. The cross-section of the inner conveying tube (23) consists of two parts: the lower half is a solid structure without mesh, and the upper half is a dust-passing mesh cover (28), on which diamond-shaped mesh holes with a diameter of 0.5-1.2 mm are opened and the hole diameter is smaller than the smallest particle size of rice. Three independent suction components, with the suction end connected to the front, middle and rear suction areas respectively; The blow-jet assembly has jet ends distributed axially along the lower wall of the inner conveying pipe (23); Sensors (33) are installed in each dust collection zone to monitor the negative pressure value in real time; When the negative pressure value of any segment exceeds the preset threshold, the corresponding suction component is triggered to perform pulse suction adjustment, and the blow-jet component is linked to increase the jet volume, forming a "blow-suction" coordinated dust removal mechanism; The intelligent control system receives sensor (33) data through the Internet of Things module, dynamically adjusts the suction parameters of the three-stage suction component and the jet frequency of the blow-jet component, and realizes real-time control of dust concentration and automatic early warning of blockage during the conveying process.

2. The conveying device for rice processing according to claim 1, characterized in that, The inner conveying tube (23) is equipped with a conveying propeller (27), whose discharge end is connected to the drive motor assembly (13) to drive the conveying of rice grains.

3. The conveying device for rice processing according to claim 1, characterized in that, The suction tube (21) is provided with a feeding hopper (14) at the feeding end. The feeding port of the feeding hopper (14) passes through the suction tube (21) and is connected to the feeding end of the conveying inner tube (23). The suction tube (21) is provided with a discharge cylinder (15) at the end away from the feeding hopper (14). The discharge cylinder (15) passes through the bottom of the suction tube (21) and is connected to the discharge end of the conveying inner tube (23).

4. The conveying device for rice processing according to claim 1, characterized in that, The suction assembly includes three centrifugal vacuum cleaners (12), whose suction ends are connected to the front, middle and rear suction areas respectively through the suction tube (22), and the dust outlet is provided with a dust bag (17). The three centrifugal vacuum cleaners (12) are fixed to the conveying bracket (11) through the horizontal mounting plate (16), and the suction decreases from the feeding end to the discharging end.

5. A conveying device for rice processing according to claim 4, characterized in that, The blowing and spraying assembly includes an air supply pump (26), whose air outlet extends through a vertical spray pipe (25) to the annular dust collection space and runs along the lower wall of the material conveying inner pipe (23). The vertical spray pipe (25) is equipped with an array of air jet heads that spray into the interior of the material conveying inner pipe (23).

6. The conveying device for rice processing according to claim 1, characterized in that, The dust collection screen (28) is provided with multiple partition seats (29) to divide the dust collection space into three independent areas corresponding to the front, middle and rear sections.

7. A conveying device for rice processing according to claim 6, characterized in that, The dust filter screen (28) and the lower half of the conveying inner tube (23) are flexibly connected by a dividing film (35). Elastic sheets (34) are provided on the outer walls of the two. The elastic sheets (34) of the same section are connected by a connecting plate (31). A vibrator (32) is provided on the connecting plate (31). The vibrator (32) is controlled according to the negative pressure data of the sensor (33) to drive the dust filter screen (28) to shake to remove the clogging dust.

8. A conveying device for rice processing according to claim 7, characterized in that, The outer wall of the suction tube (21) is provided with multiple outer protective covers (24), and the vibrator (32) is located inside it and does not contact the inner wall of the outer protective cover (24), providing a vibration space.

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