Wheat conveying and screening device for flour production

Abstract

The invention relates to the technical field of flour production equipment, in particular to a flour production wheat conveying and screening device which comprises first conveying equipment and second conveying equipment which are used for conveying materials, and a first box body, a second box body and a third box body are arranged between the first conveying equipment and the second conveying equipment. A first liquid cavity and a first conveying mechanism are arranged in the first box body, a second liquid cavity and a second conveying mechanism are arranged in the second box body, and a third liquid cavity and a third conveying mechanism are arranged in the third box body, so that materials are moved from the first conveying equipment to the second conveying equipment through the first box body, the second box body and the third box body; according to the structure that materials float in the first liquid cavity and sink and clean in the second liquid cavity and the third liquid cavity, multiple functions of conveying, screening, cleaning, draining and the like are integrated, the technological process of flour production is simplified, the occupied area of equipment is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of flour production equipment technology, specifically to a wheat conveying and screening device for flour production. Background Technology

[0002] In flour production, the transportation and screening of wheat are crucial pre-processing steps. During harvesting, storage, and transportation, wheat inevitably gets mixed with impurities such as stones, soil, weed seeds, and shriveled grains. If these impurities are not effectively removed, they will not only affect the quality and taste of the flour, but may also damage subsequent grinding equipment and increase production and maintenance costs. Currently, commonly used wheat screening devices in the industry mainly include vibrating screens and air separators. Vibrating screens separate impurities of different particle sizes through the vibration of the screen mesh, but they are less effective at separating impurities similar in size to wheat (such as small stones), and the screen mesh is prone to clogging, requiring frequent cleaning and maintenance. Air separators use airflow to separate impurities of different specific gravities (such as shriveled grains and weed seeds) from wheat, but their separation efficiency is greatly affected by airflow stability, and they cannot remove impurities such as soil with a specific gravity similar to wheat. Furthermore, traditional screening devices often only perform a single screening function, and the screened wheat still needs to be cleaned by separate washing equipment, further increasing the complexity of the production process and energy consumption. Therefore, developing a wheat processing device that integrates conveying, screening, and cleaning, with high screening efficiency, thorough impurity removal, and convenient maintenance, has become a pressing technical problem to be solved in the current flour production industry. Summary of the Invention

[0003] In view of the shortcomings of the prior art and to overcome the defects of the prior art, the present invention aims to provide a wheat conveying and screening device for flour production, so as to solve the problems mentioned in the background art.

[0004] The technical solution is a wheat conveying and screening device for flour production, comprising a first conveying device and a second conveying device for conveying materials. A first box, a second box, and a third box are provided between the first conveying device and the second conveying device. A first liquid chamber and a first conveying mechanism are provided in the first box. A second liquid chamber and a second conveying mechanism are provided in the second box. A third liquid chamber and a third conveying mechanism are provided in the third box. This forms a structure in which materials move from the first conveying device through the first box, the second box, and the third box to the second conveying device, and the materials float in the first liquid chamber and sink and are cleaned in the second and third liquid chambers.

[0005] Preferably, the density of the liquid in the first liquid chamber is greater than the density of the material, and the density of the liquid in the second and third liquid chambers is less than the density of the material. Density sensor mounting positions are provided in the first, second, and third liquid chambers.

[0006] Preferably, the upper part of the first housing is rotatably connected to a roller, the outer side of the roller is in contact with the liquid in the first liquid chamber, and a baffle is installed on the outer side of the roller, forming a structure in which the material moves to the first conveying mechanism after passing under the roller.

[0007] Preferably, the first conveying mechanism includes a conveyor belt, one end of which is located inside the first liquid chamber, and the other end of which is located above the second housing. Baffles are installed on the conveyor belt, and each baffle has a first filter hole.

[0008] Preferably, the bottom of the first housing is provided with a first opening, a valve is installed at the first opening, and a first filter plate is provided above the first opening of the first housing, the first filter plate being located inside the first liquid chamber.

[0009] Preferably, the second conveying mechanism includes a screw conveyor, the inlet of which is located at the bottom of the second liquid chamber, the outlet of which is located above the third housing, a feed hopper is installed at the inlet of which is located inside the second liquid chamber, and the upper port of which is located directly below the outlet of the first conveying mechanism.

[0010] Preferably, a partition is installed inside the second housing, the middle part of which contacts the upper surface of the second liquid chamber. The partition and the second housing cooperate to form a ring structure. The second conveying mechanism is located outside the ring structure. A through hole is opened in the upper surface of the second liquid chamber in the second housing. The through hole is located on the ring structure. A water tank is installed on the outer side of the second housing at the through hole. A second filter plate is installed inside the water tank. The filter plate is located below the through hole. The bottom of the water tank is connected to the water outlet pipe. The water outlet pipe is connected to the water pump inlet after passing through a filter valve. A water inlet pipe is installed at the water pump outlet. One end of the water inlet pipe is located inside the second housing.

[0011] Preferably, the bottom of the second box is provided with a second opening, and a valve is installed at the second opening. The second box and the third box have the same structure, and the second conveying mechanism and the third conveying mechanism have the same structure.

[0012] Preferably, a draining mechanism for moving materials and reducing surface moisture of the materials is provided between the third conveying mechanism and the second conveying device.

[0013] Preferably, the draining mechanism includes a fourth housing, a rotating rod rotatably connected to the fourth housing, a push plate mounted on the rotating rod, an arc-shaped plate mounted inside the fourth housing, the arc-shaped plate slidingly contacting the end of the push plate away from the rotating rod, a receiving plate mounted on one side of the arc-shaped plate, the receiving plate being directly below the discharge port in the third conveying mechanism, and a discharge plate mounted on the other side of the arc-shaped plate. The discharge plate and the receiving plate are arranged at an inclination to the horizontal plane, the lower end of the discharge plate being outside the fourth housing, second filter holes are formed on the arc-shaped plate, the receiving plate, and the push plate, each second filter hole being directly above the bottom surface of the fourth housing, a water outlet is formed at the bottom of the fourth housing, and a valve is mounted on the water outlet.

[0014] This invention provides a wheat conveying and screening device for flour production, which has the following advantages compared with the prior art: 1. By setting up a first, second, and third liquid chamber with liquids of different densities, the difference in the buoyancy of wheat and impurities in liquids of different densities is utilized to achieve precise screening and deep cleaning of wheat. In the first liquid chamber, wheat with a density less than that of the liquid floats, allowing impurities with a higher density to be separated. In the second and third liquid chambers, the wheat sinks, and through the flow and agitation of the liquid, impurities such as mud and dust attached to the surface of the wheat are effectively removed, significantly improving the cleanliness of the wheat and providing high-quality raw materials for subsequent flour production.

[0015] 2. This device abandons the high-friction method of traditional mechanical screening and mainly relies on liquid buoyancy and the smooth conveying mechanism to move materials, which greatly reduces the damage rate of wheat during the conveying and screening process, improves the utilization rate of wheat, and reduces production costs.

[0016] 3. It integrates multiple functions such as conveying, screening, washing, and draining, which simplifies the flour production process, reduces the equipment footprint, and improves production efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0018] Figure 2 This is a three-dimensional enlarged schematic diagram of the first housing of the present invention.

[0019] Figure 3 This is a partial enlarged cross-sectional view of the first housing of the present invention.

[0020] Figure 4 This is a three-dimensional enlarged schematic diagram of the second housing of the present invention.

[0021] Figure 5 This is a partial enlarged cross-sectional view of the second housing of the present invention.

[0022] Figure 6 This is a three-dimensional enlarged schematic diagram of the fourth housing of the present invention.

[0023] Figure 7 This is a partial enlarged cross-sectional view of the fourth housing of the present invention.

[0024] In the diagram: 1 First conveying mechanism, 1.1 Conveyor belt, 1.2 Baffle, 1.3 First filter hole, 2 Second conveying mechanism, 2.1 Screw conveyor, 2.2 Feed hopper, 3 Third conveying mechanism, 4 First housing, 5 Second housing, 6 Third housing, 7 Drainage mechanism, 7.1 Fourth housing, 7.2 Rotating rod, 7.3 Push plate, 7.4 Arc plate, 7.5 Receiving plate, 7.6 Discharge plate, 7.7 Second filter hole, 7.8 Water outlet, 8 Roller, 9 Paddle plate, 10 First opening, 11 First filter plate, 12 Partition, 13 Through hole, 14 Water tank, 15 Second filter plate, 16 Water outlet pipe, 17 Water pump, 18 Filter valve, 19 Second opening, 20 Water inlet pipe. Detailed Implementation

[0025] The technical solutions of various embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 the present invention.

[0026] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0028] Please see Figure 1-7This invention provides a technical solution: a wheat conveying and screening device for flour production, comprising a first conveying device and a second conveying device for conveying materials. A first housing 4, a second housing 5, and a third housing 6 are disposed between the first and second conveying devices. The first housing 4 contains a first liquid chamber and a first conveying mechanism 1; the second housing 5 contains a second liquid chamber and a second conveying mechanism 2; and the third housing 6 contains a third liquid chamber and a third conveying mechanism 3. This forms a structure where materials move from the first conveying device through the first housing 4, the second housing 5, and the third housing 6 to the second conveying device, with the materials floating in the first liquid chamber and sinking and being cleaned in the second and third liquid chambers. The materials are suitable agricultural products such as wheat. The first and second conveying devices can be belt conveyors, which are existing technologies and facilitate material conveying. Other suitable conveying devices can also be used. In operation, the conveying equipment transports wheat to the first container 4 via the first conveyor. The wheat floats in the first liquid chamber and is then moved to the second container 5 via the first conveyor mechanism 1. The first liquid chamber allows heavy impurities such as pebbles mixed in with the wheat to sink. After entering the second container 5, the wheat sinks in the second liquid chamber, allowing light impurities such as shriveled grains and weed seeds to float, thus performing preliminary cleaning. The second conveyor mechanism 2 moves the wheat from the second liquid chamber to the third container 6, where it sinks and is then moved to the next device via the third conveyor mechanism 3. The wheat undergoes further cleaning in the third liquid chamber. This integrates the functions of conveying, screening, and cleaning wheat into one unit, achieving continuous processing of materials from conveying to screening to cleaning, effectively simplifying the production process and reducing the equipment footprint.

[0029] Furthermore, the density of the liquid in the first liquid chamber is greater than the density of the material, while the density of the liquid in the second and third liquid chambers is less than the density of the material. In the first liquid chamber, a salt solution of appropriate concentration can be used to allow the wheat to float, while heavier impurities such as pebbles, which are denser than the liquid, sink. Density sensor installation positions are set in the first, second, and third liquid chambers. Density sensors are installed at these positions to monitor the liquid density in each chamber in real time. When the density deviates from the set value, it can be adjusted by adding solvent or solute to ensure the stability of the screening effect.

[0030] Furthermore, the density of the liquid in the second liquid chamber is greater than that in the third liquid chamber. In the second liquid chamber, a salt solution can also be used. By adjusting the concentration, the density can be changed so that the wheat can sink in the second liquid chamber, while light impurities such as shriveled grains and weed seeds float. In the third liquid chamber, clean water can be used to reduce the salt content on the surface of the wheat.

[0031] Furthermore, the upper part of the first housing 4 is rotatably connected to the roller 8 via bearings. The outer side of the roller 8 is in contact with the liquid in the first liquid chamber. A deflector plate 9 is welded and fixed on the outer side of the roller 8, forming a structure in which the material moves to the first conveying mechanism 1 after passing under the roller 8. Each deflector plate 9 is evenly distributed in a ring around the rotation axis of the roller 8. The rotation of the deflector plates 9 driven by the roller 8 causes the wheat that has just entered the first housing 4 to move towards the roller 8, and then from the roller 8 to the first conveying mechanism 1. At the same time, through the cooperation of the roller 8 and the deflector plates 9, the wheat passes under the roller 8 when it passes through the roller 8, thus forming a structure in which the material moves to the first conveying mechanism 1 after passing under the roller 8. This ensures that when the wheat passes through the roller 8, it is located in the first liquid chamber. After passing through the roller 8, the wheat floats on the upper surface of the first liquid chamber, which facilitates the separation of heavy impurities in the wheat. The first housing 4 is bolted to the first motor. The output shaft of the first motor is fixed to the roller 8 through a reducer and a coupling. The operation of the first motor drives the rotation of the roller 8.

[0032] Furthermore, the first conveying mechanism 1 includes a conveyor belt 1.1, which is a device in the prior art. One end of the conveyor belt 1.1 is located inside the first liquid chamber, and the other end of the conveyor belt 1.1 is located above the second housing 5. Baffles 1.2 are bonded and fixed to the belt of the conveyor belt 1.1. Each baffle 1.2 has a first filter hole 1.3. Through each first filter hole 1.3, the excess liquid carried out by the first conveying mechanism 1 during operation can flow back into the first liquid chamber.

[0033] Furthermore, a first opening 10 is provided at the bottom of the first housing 4, and a valve is installed at the first opening 10. A first filter plate 11 is bolted to the first housing 4 above the first opening 10. The first filter plate 11 is located in the first liquid chamber, which can prevent impurities from clogging the first opening 10 and facilitate the centralized cleaning of impurities.

[0034] Furthermore, the second conveying mechanism 2 includes a screw conveyor 2.1, which is a device in the prior art. The screw conveyor 2.1 is driven by a motor to rotate the screw blades to realize material conveying. The inlet of the screw conveyor 2.1 is located at the bottom of the second liquid chamber, and the outlet of the screw conveyor 2.1 is located above the third box 6, which facilitates the conveying of wheat in the second liquid chamber to the third box 6. The inlet of the screw conveyor 2.1 is welded to the feed hopper 2.2, which is located in the second liquid chamber. The upper port of the feed hopper 2.2 is located directly below the outlet of the first conveying mechanism 1, which ensures that the wheat conveyed by the first conveying mechanism 1 can fall accurately into the feed hopper 2.2. At the same time, the screw conveyor 2.1 facilitates good cleaning of the wheat.

[0035] Furthermore, a partition 12 is welded and fixed inside the second housing 5. The middle part of the partition 12 contacts the upper surface of the second liquid chamber. The partition 12 and the second housing 5 cooperate to form a ring structure. Floating light impurities will gather inside the ring structure. The second conveying mechanism 2 is located outside the ring structure. A through hole 13 is opened in the upper surface of the second liquid chamber of the second housing 5. The through hole 13 is located on the ring structure. A water tank 14 is welded and fixed to the outer side of the second housing 5 at the through hole 13. The second filter plate is snapped and fixed inside the water tank 14. 15. The filter plate is located below the through hole 13. Floating light impurities enter the water tank 14 with the liquid through the through hole 13. The second filter plate 15 can intercept the light impurities. The bottom of the water tank 14 is connected to the water outlet pipe 16. The water outlet pipe 16 is connected to the inlet of the water pump 17 after passing through the filter valve 18. The water pump 17 outlet is equipped with an inlet pipe 20. One end of the inlet pipe 20 is located inside the second tank 5. Through the action of the water pump 17, the liquid in the second liquid chamber can be circulated and the light impurities floating in the second liquid chamber can be removed.

[0036] Furthermore, a second opening 19 is provided at the bottom of the second box 5, and a valve is installed at the second opening 19. The second box 5 has the same structure as the third box 6, and the second conveying mechanism 2 has the same structure as the third conveying mechanism 3. After the wheat enters the third box 6, the liquid in the third liquid chamber reduces the salt content on the surface of the wheat. At the same time, the wheat is cleaned again by the third conveying mechanism 3 and the liquid in the third liquid chamber. The third conveying mechanism 3 transports the wheat to the next device.

[0037] Furthermore, a draining mechanism 7 for moving materials and reducing surface moisture is provided between the third conveying mechanism 3 and the second conveying equipment.

[0038] Furthermore, the draining mechanism 7 includes a fourth housing 7.1, on which a rotating rod 7.2 is rotatably connected via bearings. A push plate 7.3 is fixed to the rotating rod 7.2 with screws. An arc-shaped plate 7.4 is welded and fixed inside the fourth housing 7.1. The arc-shaped plate 7.4 slides in contact with the end of the push plate 7.3 away from the rotating rod 7.2. A receiving plate 7.5 is installed on one side of the arc-shaped plate 7.4 and is welded and fixed to the fourth housing 7.1. The receiving plate 7.5 is located directly below the discharge port in the third conveying mechanism 3, facilitating the falling of wheat removed by the third conveying mechanism 3 onto the receiving plate 7.5. The other side of the arc-shaped plate 7.4... The side-mounted discharge plate 7.6, arc-shaped plate 7.4, discharge plate 7.6, and receiving plate 7.5 are an integrated structure. The discharge plate 7.6 and receiving plate 7.5 are arranged at an angle to the horizontal plane. The lower end of the discharge plate 7.6 is located outside the fourth housing 7.1 and above the second conveying equipment. Second filter holes 7.7 are opened on the arc-shaped plate 7.4, receiving plate 7.5, and push plate 7.3. Each second filter hole 7.7 is located directly above the bottom surface of the fourth housing 7.1. When the plane of the push plate 7.3 is in a horizontal state, the upper edge of the discharge plate 7.6 and the upper surface of the push plate 7.3 are on the same plane. In the case of the discharge plate 7.6, the upper edge of the discharge plate 7.6 contacts the adjacent push plate 7.3. Alternatively, when the plane of the push plate 7.3 is horizontal, the height of the upper edge of the discharge plate 7.6 is lower than the height of the upper surface of the push plate 7.3. The bottom of the fourth box 7.1 has a water outlet 7.8, and a valve is installed on the water outlet 7.8. The wheat entering the fourth box 7.1 first falls onto the receiving plate 7.5. By tilting the receiving plate 7.5, the wheat moves to the arc plate 7.4. The arc plate 7.4 slides into contact with the end of the push plate 7.3 away from the rotating rod 7.2. The push plate 7.3 rotates, pushing the wheat to... At the discharge plate 7.6, the tilt of the discharge plate 7.6 causes the wheat to fall into the second conveying equipment, which then transports the processed wheat to the subsequent production stage. When the wheat is in the fourth box 7.1, the surface moisture of the wheat flows downward to the bottom of the fourth box 7.1 through the second filter hole 7.7. The rotation of the rotating rod 7.2 causes the wheat to move, thereby moving the material and reducing the surface moisture of the material. The second motor is bolted to the outside of the fourth box 7.1. The output shaft of the second motor is fixed to the rotating rod 7.2 through a reducer and coupling. The operation of the second motor causes the rotating rod 7.2 to rotate.

[0039] The system utilizes the rotation of the first conveying mechanism 1, the second conveying mechanism 2, the third conveying mechanism 3, and the rotating rod 7.2 to sequentially move materials such as wheat to the next equipment. The liquid in the first liquid chamber, the second liquid chamber, and the third liquid chamber causes the wheat to float in the first liquid chamber and sink in the second and third liquid chambers. Through the second and third liquid chambers, and in cooperation with the second and third conveying mechanisms 2 and 3, the wheat is cleaned. This creates a structure in which materials move from the first conveying equipment through the first box 4, the second box 5, and the third box 6 to the second conveying equipment, with the materials floating in the first liquid chamber and sinking and being cleaned in the second and third liquid chambers.

[0040] The working principle of this invention is as follows: First, the wheat to be processed is conveyed to the first liquid chamber in the first box 4 through the first conveying device. Since the liquid density in the first liquid chamber is greater than that of the wheat, the wheat floats on the liquid surface, while heavy impurities such as stones sink to the bottom of the first liquid chamber. Subsequently, the first motor drives the roller 8 to rotate, and the deflector 9 moves the floating wheat to the conveyor belt 1.1 in the first conveying mechanism 1. The conveyor belt 1.1 conveys the wheat to the second liquid chamber in the second box 5. Since the liquid density in the second liquid chamber is less than that of the wheat, the wheat sinks in the second liquid chamber and falls into the feed hopper 2.2. Shriveled grains, weed seeds, and other light impurities float on the liquid surface and gather in the annular structure under the action of the partition 12. They enter the water tank 14 through the through hole 13 with the liquid and are filtered and intercepted by the second filter plate 15. At the same time, the water pump 17 pumps the filtered liquid in the water tank 14 back to the second liquid chamber to realize liquid circulation. The second conveying mechanism 2 and the liquid in the second liquid chamber work together to process the wheat. For cleaning, the screw conveyor 2.1 transports the wheat from the feed hopper 2.2 to the third box 6. The second box 5 has the same structure as the third box 6, and the second conveying mechanism 2 has the same structure as the third conveying mechanism 3. After the wheat enters the third box 6, the liquid in the third liquid chamber reduces the salt content on the surface of the wheat. At the same time, the third conveying mechanism 3 and the liquid in the third liquid chamber clean the wheat again. The third conveying mechanism 3 transports the wheat to the receiving plate 7.5 in the fourth box 7.1. The tilting of the receiving plate 7.5 moves the wheat to the arc plate 7.4. The rotating rod 7.2 drives the push plate 7.3 to rotate, pushing the wheat to the discharge plate 7.6. The tilting of the discharge plate 7.6 causes the wheat to fall into the second conveying equipment, which then transports it to the subsequent production process. Meanwhile, when the wheat is in the fourth box 7.1, the surface moisture flows downward to the bottom of the fourth box 7.1 through the second filter hole 7.7.

[0041] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A wheat conveying and screening device for flour production, comprising a first conveying device and a second conveying device for conveying materials, characterized in that: A first box (4), a second box (5), and a third box (6) are provided between the first conveying device and the second conveying device. The first box (4) is provided with a first liquid chamber and a first conveying mechanism (1). The second box (5) is provided with a second liquid chamber and a second conveying mechanism (2). The third box (6) is provided with a third liquid chamber and a third conveying mechanism (3). This forms a structure in which material moves from the first conveying device through the first box (4), the second box (5), and the third box (6) to the second conveying device, and the material floats in the first liquid chamber and sinks and is cleaned in the second and third liquid chambers.

2. The wheat conveying and screening device for flour production according to claim 1, characterized in that: The density of the liquid in the first liquid chamber is greater than the density of the material, while the density of the liquid in the second and third liquid chambers is less than the density of the material. Density sensor installation positions are provided in the first, second, and third liquid chambers.

3. The wheat conveying and screening device for flour production according to claim 1, characterized in that: The upper part of the first box (4) is rotatably connected to the roller (8), the outer side of the roller (8) is in contact with the liquid in the first liquid chamber, and the outer side of the roller (8) is equipped with a baffle (9), forming a structure in which the material moves to the first conveying mechanism (1) after passing under the roller (8).

4. The wheat conveying and screening device for flour production according to claim 1, characterized in that: The first conveying mechanism (1) includes a conveyor belt (1.1), one end of which is located in the first liquid chamber and the other end of which is located above the second housing (5). Baffles (1.2) are installed on the belt of the conveyor belt (1.1), and each baffle (1.2) has a first filter hole (1.3).

5. The wheat conveying and screening device for flour production according to claim 1, characterized in that: The bottom of the first box (4) is provided with a first opening (10), a valve is installed at the first opening (10), and a first filter plate (11) is provided above the first opening (10) of the first box (4), and the first filter plate (11) is located in the first liquid chamber.

6. The wheat conveying and screening device for flour production according to claim 1, characterized in that: The second conveying mechanism (2) includes a screw conveyor (2.1), the inlet of which is located at the bottom of the second liquid chamber, the outlet of which is located above the third housing (6), the inlet of which is equipped with a feed hopper (2.2), the feed hopper (2.2) is located inside the second liquid chamber, and the upper port of the feed hopper (2.2) is located directly below the outlet of the first conveying mechanism (1).

7. The wheat conveying and screening device for flour production according to claim 1, characterized in that: A partition (12) is installed inside the second housing (5). The middle part of the partition (12) is in contact with the upper surface of the second liquid chamber. The partition (12) and the second housing (5) cooperate to form a ring structure. The second conveying mechanism (2) is located outside the ring structure. A through hole (13) is opened on the upper surface of the second liquid chamber in the second housing (5). The through hole (13) is located on the ring structure. A water tank (14) is installed on the outer side of the second housing (5) at the through hole (13). A second filter plate (15) is installed inside the water tank (14). The filter plate is located below the through hole (13). The bottom of the water tank (14) is connected to the water outlet pipe (16). The water outlet pipe (16) is connected to the inlet of the water pump (17) after passing through the filter valve (18). An inlet pipe (20) is installed at the outlet of the water pump (17). One end of the inlet pipe (20) is located inside the second housing (5).

8. A wheat conveying and screening device for flour production according to claim 1, characterized in that: The bottom of the second box (5) is provided with a second opening (19), and a valve is installed at the second opening (19). The second box (5) has the same structure as the third box (6), and the second conveying mechanism (2) has the same structure as the third conveying mechanism (3).

9. A wheat conveying and screening device for flour production according to claim 1, characterized in that: A draining mechanism (7) for moving materials and reducing surface moisture is provided between the third conveying mechanism (3) and the second conveying device.

10. A wheat conveying and screening device for flour production according to claim 9, characterized in that: The draining mechanism (7) includes a fourth housing (7.1), on which a rotating rod (7.2) is rotatably connected. A push plate (7.3) is mounted on the rotating rod (7.2). An arc-shaped plate (7.4) is installed inside the fourth housing (7.1). The arc-shaped plate (7.4) slides in contact with one end of the push plate (7.3) away from the rotating rod (7.2). A receiving plate (7.5) is mounted on one side of the arc-shaped plate (7.4). The receiving plate (7.5) is located directly below the discharge port in the third conveying mechanism (3). On the other side of .4), a discharge plate (7.6) is installed. The discharge plate (7.6) and the receiving plate (7.5) are arranged at an angle to the horizontal plane. The lower end of the discharge plate (7.6) is located outside the fourth box (7.1). The arc plate (7.4), the receiving plate (7.5), and the push plate (7.3) are provided with second filter holes (7.7). Each second filter hole (7.7) is located directly above the bottom surface of the fourth box (7.1). A water outlet (7.8) is provided at the bottom of the fourth box (7.1). A valve is installed on the water outlet (7.8).

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