A cleaning device and method with feed rate monitoring function

Abstract

The application discloses a cleaning device and method with feeding amount monitoring function. The cantilevered round pipe screen is arranged in the form of stepwise descending from front to back, and a wind outlet is arranged at the lower part of the screen pipe. The screen pipe is connected with the air pressure sensor through the air nozzle, so that the air pressure sensor can detect the air pressure below the screen surface. When the feeding amount of the cleaning screen is too large, that is, too much material falls on the cleaning screen, the material layer thickness on the screen pipe increases, and the air beam blown by the fan is blocked when passing through the material layer on the screen pipe. The air pressure increases at this position, and the air pressure is transmitted to the air pressure sensor through the screen pipe and the air nozzle, thereby realizing in-situ monitoring of the air pressure change of the cleaning screen.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery and equipment, specifically relating to a cleaning device and method with a feeding amount monitoring function. Background Technology

[0002] Mechanization, as a major way to improve agricultural production efficiency and reduce labor costs, has provided a strong guarantee for the development of agricultural production.

[0003] There are two main types of mechanized peanut harvesting: combined harvesting and two-stage harvesting. Combined harvesting is a semi-feeding method, where the picking operation mainly uses a clamping roller brush dragging method. This method results in fewer vine and impurities in the pods, and since the peanut pods are fresh at harvest, the pods and vines are relatively heavy, making it easy to separate the vines and impurities from the pods. Two-stage harvesting involves using an excavator to dig up the peanuts and then spreading them in the field to dry until semi-dry, followed by harvesting with a pick-up harvester. The pick-up harvester is a full-feeding method. After the picking operation, the material falling onto the cleaning screen includes peanut pods, broken branches and vines (long and short impurities), broken leaves, and soil. If too much material falls onto the cleaning screen, i.e., the feeding rate of the cleaning device is too large, the various materials cannot be separated in time, easily causing screen blockage, leading to an increased impurity rate in the pods and affecting the cleaning effect. Once the screen is blocked, the machine needs to be stopped for manual cleaning, affecting the smoothness of machine operation and efficiency.

[0004] Therefore, it is necessary to monitor the feed rate of the cleaning device to provide a basis for parameter adjustment. Due to the complex materials on the cleaning screen surface of peanut picking and harvesting combined harvesters, the harsh working conditions, high dust levels, and low visibility, monitoring technologies such as image and wind speed cannot be applied. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems existing in the prior art and to provide a device and method for monitoring the feed amount of a cleaning device.

[0006] The specific technical solution adopted in this invention is as follows:

[0007] In a first aspect, the present invention provides a cleaning device with a feed rate monitoring function, which includes a frame and a first blower, a stepped cantilever circular tube screen, a second blower, a tail screen, a feed inlet and a discharge outlet mounted on the frame.

[0008] The stepped cantilever circular tube screen and the tail screen are arranged between the feed inlet and the discharge outlet of the cleaning device and installed on the vibrating part of the frame. The stepped cantilever circular tube screen is composed of multiple rows of cantilever screen tubes spliced ​​together row by row. In the direction from the end away from the tail screen to the end closer to the tail screen, the surface height of the cantilever screen tubes decreases row by row, forming a material conveying and sorting surface with a stepped decreasing height. The surface height of each row of cantilever screen tubes is the same. The main body of a single cantilever screen tube is at least two parallel zigzag cantilever circular tubes. The first ends of the two zigzag cantilever circular tubes are connected to air nozzles at the same time, and the second ends are closed. The first tube section close to the air nozzle is installed on the frame by a fixing component, and the second tube section away from the air nozzle serves as a component unit of the material conveying and sorting surface. Each second tube section in the zigzag cantilever circular tube has an air intake on its lower surface, and its air nozzle is connected to a ventilation pressure sensor.

[0009] The feed inlet is located above the material conveying and sorting surface, and the outlet of the tail screen is connected to the discharge port; the air outlet of the second fan is aligned with the outlet of the tail screen, and the air outlet of the first fan is aligned with the material conveying and sorting surface so that the air force penetrates the material conveying and sorting surface from bottom to top.

[0010] As a preferred embodiment of the first aspect, the number of parallel zigzag cantilevered tubes in a single cantilevered screen tube is two.

[0011] As a preferred embodiment of the first aspect mentioned above, the spacing between adjacent zigzag cantilevered tubes in the cantilever screen tube is 5 to 10 mm.

[0012] As a preferred embodiment of the first aspect mentioned above, the spacing between adjacent zigzag cantilevered tubes in the cantilever screen tube is preferably 7 to 8 mm.

[0013] As a preferred embodiment of the first aspect, the second end of the zigzag cantilever tube is sealed by a removable sealing plate.

[0014] As a preferred embodiment of the first aspect, the fixing member is a horizontal mounting rod with mounting holes. All the cantilever screen tubes in each row of cantilever screen tubes are fixedly installed by a horizontal mounting rod, and each zigzag cantilever tube of each cantilever screen tube passes through a mounting hole on the horizontal mounting rod for fixing and limiting.

[0015] As a preferred embodiment of the first aspect, the internal space of the tail screen is divided by multiple parallel vertical screen plates, and the top of each vertical screen plate is designed with serrations.

[0016] As a preferred embodiment of the first aspect above, the air nozzle is connected to the wind pressure sensor via a flexible hose.

[0017] Secondly, the present invention provides a method for monitoring the peanut feeding amount of the cleaning device as described in any of the embodiments of the first aspect above, specifically as follows: during the operation of continuously feeding peanut material mixed with vines and impurities into the material conveying and sorting surface through the feed inlet, vibration is applied to the material conveying and sorting surface and the tail screen to continuously convey the material along the material conveying and sorting surface. At the same time, the first fan and the second fan are kept running continuously. The first fan blows the material conveyed from the feed inlet to the tail screen along the material conveying and sorting surface. Some of the vines and impurities fall to the ground through the gap between the zigzag cantilevered round pipes, and some of the vines and impurities are discharged from the impurity discharge area by the wind. During the process of the remaining material falling from the material conveying and sorting surface into the tail screen, the second fan further wind-sorts the material to separate the peanut pods from the peanut vines and impurities in the material. The peanut vines and impurities are discharged from the impurity discharge area by the wind, and the peanut pods fall into the discharge port for subsequent collection.

[0018] During operation, the air pressure of the air nozzles of different cantilever screen tubes in the stepped cantilever circular tube screen is monitored in real time by the air pressure sensor. Based on the principle that material blockage on the material conveying and sorting surface will cause the air jet to be obstructed at the blockage location, thus leading to an increase in air pressure, the material blockage is detected by analyzing the changes in the monitored air pressure. When material blockage is detected, a feedback signal of excessive peanut feeding or a corresponding equipment control signal to alleviate the blockage is issued.

[0019] Thirdly, the present invention provides a peanut picking and harvesting combine machine with a cleaning device as described in any of the embodiments of the first aspect above.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] This invention proposes a feeding monitoring scheme for a cleaning device using "in-situ monitoring + stepped cantilever circular tube screen + air pressure sensor". The cantilever circular tube screen is arranged in a stepped manner from front to back, with the screen tubes arranged only longitudinally and no transversely (i.e., no crossbars). This avoids peanut vines and debris getting caught at the crossbars and improves the smoothness of their flow on the circular tube screen. An air intake is opened at the lower part of the screen tube, which is connected to the air pressure sensor via an air nozzle, allowing the sensor to detect the air pressure below the screen surface. When the feeding amount to the cleaning screen is too large, i.e., too much material falls onto the screen, the material layer on the screen tube thickens. The airflow from the blower is obstructed when passing through the material layer on the screen tube, increasing the air pressure at this point. This air pressure is transmitted to the air pressure sensor through the screen tube and air nozzle, thus achieving in-situ monitoring of air pressure changes on the cleaning screen. Attached Figure Description

[0022] Figure 1 A side view of a cleaning device with feed rate monitoring function;

[0023] Figure 2 for Figure 1 A schematic cross-sectional view of the cleaning device with feed rate monitoring function;

[0024] Figure 3 A schematic diagram of a single-row cantilever screen tube;

[0025] Figure 4 An isometric view of a single cantilever screen tube;

[0026] Figure 5 Side view of a single cantilever screen tube;

[0027] Figure 6 This is a schematic diagram of the material conveying path in the cleaning device;

[0028] Figure 7 This is a schematic diagram of the wind power output path in the cleaning device;

[0029] Figure 8 This is a schematic diagram of the tail screen of the cleaning device.

[0030] The attached diagram is labeled as follows: First fan 1, stepped cantilever circular tube screen 2, frame 3, second fan 4, tail screen 5, feed inlet 6, discharge outlet 7, horizontal mounting rod 8, zigzag cantilever circular tube 201, air nozzle 202, sealing plate 203, air intake 204, vertical screen plate 501. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention 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 thorough understanding of the present invention. However, the present invention can be practiced 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 the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. Technical features in various embodiments of the present invention can be combined accordingly without mutual conflict.

[0032] In the description of this invention, it should be understood that when an element is considered to be "connected" to another element, it can be a direct connection to the other element or an indirect connection, i.e., there is an intermediate element. Conversely, when an element is said to be "directly" connected to another element, there is no intermediate element.

[0033] In the description of this invention, it should be understood that the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0034] like Figure 1 and Figure 2 As shown, in a preferred embodiment of the present invention, a cleaning device with a feed rate monitoring function is provided. Its basic components include a first blower 1, a stepped cantilever circular tube screen 2, a frame 3, a second blower 4, a tail screen 5, a feed inlet 6, and a discharge outlet 7. The frame 3 serves as the main mounting structure for the other components in the entire cleaning device, while the first blower 1, the stepped cantilever circular tube screen 2, the second blower 4, the tail screen 5, the feed inlet 6, and the discharge outlet 7 are mounted on the frame 3. The present invention is also applicable to feed rate monitoring in the cleaning devices of other crop harvesters; the following description focuses on feed rate monitoring in the cleaning device of a peanut harvesting combine harvester.

[0035] In the cleaning device of this invention, the material conveying and sorting surface is based on a specially designed stepped cantilever circular tube screen 2. This stepped cantilever circular tube screen 2 not only serves as a material screening device but also incorporates a feed rate monitoring function. The stepped cantilever circular tube screen 2 and the tail screen 5 are arranged between the inlet 6 and outlet 7 of the cleaning device and installed on the vibrating part of the frame 3. The stepped cantilever circular tube screen 2 is constructed from multiple rows of cantilever screen tubes spliced ​​together row by row. From the end furthest from the tail screen 5 to the end closest to the tail screen 5, the surface height of the cantilever screen tubes decreases row by row, forming a material conveying and sorting surface with a progressively decreasing height. The peanut pod material containing vines and impurities input from the inlet 6 is gradually conveyed downwards along the material conveying and sorting surface and finally falls into the tail screen 5. It should be noted that during this process, the stepped cantilever circular tube screen 2 and the tail screen 5 continuously receive materials. Therefore, to ensure smooth material conveying and screening, both need to maintain continuous vibration. Thus, a vibrating motor can be installed on the frame 3 to drive the vibration of the stepped cantilever circular tube screen 2 and the tail screen 5. However, the first blower 1 and the second blower 4 do not require vibration. Therefore, the stepped cantilever circular tube screen 2 and the tail screen 5 need to be installed in the vibration area of ​​the frame 3, while the first blower 1 and the second blower 4 need to be installed in the non-vibration area. During material conveying, the vibration, combined with the air force provided by the first blower 1 and the material's own gravity, causes the material to gradually slide down the stepped cantilever circular tube screen 2 and enter the tail screen 5 for further air separation and screening. The vibrating motor that applies vibration to the cleaning device and its installation method are existing technologies and can be implemented with reference to conventional vibrating screen designs. In addition, the tail screen 5 is used to receive materials and, in addition to vibration screening, further air separates larger seedlings and impurities. In terms of spatial orientation, the feed inlet 6 is located above the material conveying and sorting surface, and the outlet of the tail screen 5 is connected to the discharge outlet 7. A conveying auger can be installed at the discharge outlet 7 to assist in pushing the material and avoid congestion. The material entering the cleaning device from the feed inlet 6 can fall directly onto the material conveying and sorting surface, then be conveyed to the tail screen 5, and finally exit the cleaning device through the discharge outlet 7. The area below the material conveying and sorting surface is open, and the falling material can fall directly to the ground. The air outlet direction of the first blower 1 is directed towards the material conveying and sorting surface, so that the air force penetrates the material conveying and sorting surface from bottom to top. The air force of the first blower 1 is evenly distributed below the material conveying and sorting surface. Under the action of wind pressure, the airflow will pass through the material conveying and sorting surface and the material layer on the material conveying and sorting surface. Some smaller parts can be blown out by the wind force in the material conveying and sorting surface, while some heavier small impurities and fragments will fall directly to the ground from the gaps between the zigzag cantilevered circular pipes 201 during the conveying process along the material conveying and sorting surface. The second fan 4 is directed to the outlet of the tail screen 5. The wind generated by the fan enters the tail screen 5 from the outlet, and then performs reverse wind separation on the fallen peanut pods and vines. The peanut pods fall naturally, while the lighter vines are blown upward by the wind.The area above the tail screen 5 is an open-type waste discharge area. Large and long impurities blown out from the material conveying and sorting surface and the tail screen 5 will be blown out from the waste discharge area by the wind.

[0036] like Figure 3 As shown, the structure of a single-row cantilever screen tube is illustrated, where the surface height of each cantilever screen tube in the row is the same to ensure a relatively flat material conveying and sorting surface. In embodiments of the present invention, as... Figure 4 and Figure 5 As shown, each cantilever screen tube includes a zigzag cantilevered circular tube 201, an air nozzle 202, a sealing plate 203, and an air intake 204. The main body of a single cantilever screen tube consists of two parallel zigzag cantilevered circular tubes 201. The main body of the zigzag cantilevered circular tube 201 is a two-section zigzag tube formed by connecting a first section and a second section. The two ends of the zigzag cantilevered circular tube 201 are referred to as the first end and the second end, respectively. The first end is located at the end of the first section, and the second end is located at the end of the second section. The first ends of both zigzag cantilevered circular tubes 201 are connected to the air nozzle 202, and the second ends are both closed, forming an overall U-shape. The second ends can be kept sealed as a single unit during processing, but for ease of maintenance, it is recommended that the second ends of the zigzag cantilevered circular tubes 201 be sealed using a removable sealing plate 203. Additionally, the first pipe section near the air nozzle 202 can be mounted on the frame 3 using a fixing device, while the second pipe section away from the air nozzle 202 serves as a component unit of the aforementioned material conveying and sorting surface. Each row of cantilever screen tubes can be installed individually using independent fixing devices; however, considering ease of installation and reliability during use, this invention employs a specific transverse mounting rod 8 with mounting holes as a fixing device. (Continue to see...) Figure 3 As shown, all the cantilever screen tubes in each row are fixedly installed by a horizontal mounting rod 8. Each zigzag cantilever tube 201 of each cantilever screen tube passes through a mounting hole on the horizontal mounting rod 8 for fixed positioning. The air nozzle 202 is located below the horizontal mounting rod 8, while the main body of the zigzag cantilever tube 201 is located above the horizontal mounting rod 8. The cantilever screen tube and the horizontal mounting rod 8 can be further secured with clips to prevent detachment, or a rubber ring that forms an interference fit can be inserted between the mounting hole and the zigzag cantilever tube 201 to achieve relative positioning. The two ends of the horizontal mounting rod 8 are fixedly installed on the frame 3. This ensures that the material conveying and sorting surface formed by all the second tube sections in each row of cantilever screen tubes remains relatively stable and will not experience tube displacement under vibration and wind. Furthermore, the second sections of all the zigzag cantilevered circular tubes 201 in the material conveying and sorting surface can maintain a uniform spacing, which should ensure that the conveyed material does not fall off. Taking peanuts as an example, the spacing between adjacent zigzag cantilevered circular tubes 201 in the cantilever screen tube is 5-10 mm, preferably 7-8 mm.

[0037] Furthermore, in this invention, the monitoring of the feed amount is not achieved through visual or weighing methods, but through air pressure monitoring. However, if air intake pipes are directly placed at the upper and lower positions of the material conveying and sorting surface, and the air pressure above and below the cleaning screen surface is led out of the cleaning screen working chamber for monitoring through the air intake pipes, peanut vines and debris can easily get caught on the air intake pipes, causing entanglement and accumulation. Therefore, this invention adopts a cleaning screen feed amount monitoring scheme of "in-situ monitoring + stepped cantilever circular tube screen + air pressure sensor". Specifically, in this invention, an air intake port 204 is opened on the lower surface of each second pipe segment in the zigzag cantilever circular tube 201, and its air nozzle 202 is connected to the air pressure sensor. The air nozzle 202 and the air pressure sensor are preferably connected by a flexible hose.

[0038] Theoretically, each of the zigzag cantilever tubes 201 in the stepped cantilever circular tube screen 2 can have an air intake 204. All the zigzag cantilever tubes 201 in a single cantilever screen tube are connected to the same air nozzle 202. The air nozzle 202 of a single cantilever screen tube is connected to an independent wind pressure sensor. In this case, the wind pressure sensor senses the average wind pressure below all the zigzag cantilever tubes 201 in a single cantilever screen tube. Through the air intakes 204 distributed below the entire material conveying and sorting surface, wind pressure can be monitored at any location using different wind pressure sensors. Of course, in practical applications, the number of wind pressure sensors can be reduced according to actual needs. For example, the air nozzles 202 of multiple adjacent cantilever screen tubes can be connected to the same wind pressure sensor, so that the wind pressure sensor senses the average wind pressure of a local area at each cantilever screen tube. In the lowest configuration, the air nozzles 202 of all the cantilever screen tubes in the stepped cantilever circular tube screen 2 are connected to the same wind pressure sensor. In this case, only the overall average wind pressure can be monitored, and the sensitivity is the lowest. Therefore, the specific number of wind pressure sensors can be selected according to actual needs.

[0039] The monitored wind pressure is primarily determined by the airflow input from the second fan 4 and the ventilation volume of the material conveying and sorting surface. Since a layer of material exists above the material conveying and sorting surface, excessive feeding thickens the material layer and reduces the porosity between particles, increasing the overall resistance of the airflow through the material conveying and sorting surface and the material layer. Consequently, the wind pressure below the material conveying and sorting surface increases. Air inlets 204 are distributed below the zigzag cantilevered circular pipe 201 in the material conveying and sorting surface, and the increased wind pressure is transmitted to the wind pressure sensor via the air nozzle 202. Therefore, the wind pressure detected by the wind pressure sensor is positively correlated with the thickness or density of the material layer. The wind pressure can be used to monitor in real time whether material blockage occurs on the material conveying and sorting surface, thereby indirectly monitoring whether the feeding rate is excessive.

[0040] thus, Figure 6The material conveying path in the cleaning device of the present invention is shown, wherein the red arrow indicates the direction of material input into the cleaning device, the green arrow indicates the conveying direction of material in the cleaning device, and the yellow arrow indicates the direction in which some small impurities or fragments fall directly from the material conveying and sorting surface. Figure 7 The output path of the airflow in the cleaning device of this invention is illustrated. In this invention, the cantilever screen tubes are arranged in a stepped manner from front to back. The screen tubes are arranged only longitudinally, without any transverse arrangement (i.e., no crossbars). This avoids peanut vines and debris getting caught at the crossbars, improving the smoothness of their flow on the circular screen. When the feed rate to the cleaning screen is too high, i.e., too much material falls onto the screen, the material layer on the screen tubes thickens. The airflow from the blower is obstructed when passing through the material layer on the screen tubes, increasing the air pressure at this point. This air pressure is transmitted to the air pressure sensor through the screen tubes and air nozzles, thus enabling in-situ monitoring of air pressure changes on the cleaning screen. Furthermore, two air inlets are opened on each of the two branches of the cantilever screen tubes, and these two air inlets are interconnected. The air pressure sensor automatically monitors the average air pressure at the two branches, preventing excessive air pressure fluctuations caused by excessive material at a single branch.

[0041] Of course, it should be noted that the above Figure 4 The number of parallel broken-line cantilevered circular tubes 201 in a single cantilever screen tube is two, but in fact it is also possible to have more than two, and it is not limited to two.

[0042] Furthermore, since the tail screen 5 of the present invention needs to receive peanut pods and vine debris, a certain screening structure can be designed in its internal space. Specifically, see [link to details]. Figure 8 As shown, the tail screen 5 adopts a triangular bucket design with an open top, and the side facing the second fan 4 serves as the material outlet. Its internal space is divided by multiple parallel triangular vertical screen plates 501, and the top of each vertical screen plate 501 is designed with serrations. This can block some larger seedlings and impurities on the top serrations, which are then blown out by the wind, preventing blockage.

[0043] In another embodiment of the present invention, a method for monitoring the peanut feeding amount based on the above-mentioned cleaning device with feeding amount monitoring function is provided. The specific method is as follows: During the operation of continuously feeding peanut material mixed with vines and impurities into the material conveying and sorting surface through the feed inlet 6, vibration is applied to the material conveying and sorting surface and the tail screen 5 to continuously convey the material along the material conveying and sorting surface. At the same time, the first fan 1 and the second fan 4 are kept running. The first fan 1 blows the material conveyed from the feed inlet 6 to the tail screen 5 along the material conveying and sorting surface. Some of the vines and impurities fall to the ground from the gap between the zigzag cantilevered circular tubes 201. Some of the vines and impurities are discharged from the discharge area by the wind. During the process of the remaining material falling from the material conveying and sorting surface into the tail screen 5, the second fan 4 further wind-sorts the material to separate the peanut pods from the peanut vines and impurities. The peanut vines and impurities are discharged from the discharge area by the wind, and the peanut pods fall into the discharge outlet 7 for subsequent collection.

[0044] During operation, the air pressure of the air nozzles 202 of different cantilever screen tubes in the stepped cantilever circular tube screen 2 is monitored in real time by the air pressure sensor. Based on the principle that material blockage on the material conveying and sorting surface will cause the air jet to be obstructed at the blockage location, thus leading to an increase in air pressure, the material blockage is detected by analyzing the changes in the monitored air pressure. When material blockage is detected, a feedback signal of excessive peanut feeding or a corresponding equipment control signal to alleviate the blockage is issued.

[0045] It should be noted that when material blockage is detected, the specific type of feedback signal indicating excessive feed rate or the corresponding control signal for relieving blockage can be designed according to the actual functional requirements of the equipment. For example, the excessive feed rate feedback signal can be issued directly on the peanut harvester itself using different methods such as sound, light, or electricity, or the feedback signal can be sent to external monitoring equipment. Simultaneously, control signals can also be sent to devices capable of relieving blockage, driving them to perform corresponding actions to alleviate the blockage. For example, a signal can be sent to the vibrating motor mounted on frame 3 to increase the frequency of vibration applied to the cleaning device, or a signal can be sent to the first fan 1 and the second fan 4 to increase the airflow and improve cleaning efficiency; alternatively, a signal can be sent to the fruit-picking device at the front end of the cleaning device to reduce the material feed rate into the cleaning device, thus relieving blockage.

[0046] In another embodiment of the present invention, a peanut harvesting combine harvester with the aforementioned cleaning device having a feeding amount monitoring function is also provided. A peanut harvesting combine harvester generally includes a peanut harvesting platform, a picking device, a cleaning device, and a fruit collection device. The specific structures of the peanut harvesting platform, picking device, and fruit collection device, except for the cleaning device, can be implemented using existing technologies and are not limited thereto. In the peanut picking platform, peanut vines are picked up by a picker and then gathered and discharged into a picking device by an auger. In the picking device, the peanut vines enter a channel composed of a picking roller and a concave screen. Under the impact and movement of the spring teeth on the rotating picking roller, they are conveyed backward along the concave screen. The peanut pods and debris that are knocked off are fed into a cleaning device. In the cleaning device, the peanut pods and peanut vine debris enter the material conveying and sorting surface. Under the continuous vibration of the vibrating mechanism and the airflow from the bottom up across the material conveying and sorting surface provided by the blower, a certain degree of separation and impurity removal is achieved. Further impurity removal is then achieved in the tail screen 5. The impurities discharged from both stages are blown out from the top impurity discharge area. Finally, the obtained peanut pods are discharged through the discharge port 7 and ultimately collected in the fruit collection device.

[0047] The embodiments described above are merely some preferred implementations of the present invention and are not intended to limit the invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, all technical solutions obtained through equivalent substitution or transformation fall within the protection scope of the present invention.

Claims

1. A cleaning device with feed rate monitoring function, characterized in that, Includes frame (3) and a first fan (1), a stepped cantilever circular tube screen (2), a second fan (4), a tail screen (5), a feed inlet (6) and a discharge outlet (7) mounted on the frame (3); The stepped cantilever circular tube screen (2) and the tail screen (5) are arranged between the feed inlet (6) and the discharge outlet (7) of the cleaning device and are installed on the vibrating part of the frame (3); the stepped cantilever circular tube screen (2) is composed of multiple rows of cantilever screen tubes spliced ​​together row by row, and in the direction from the end away from the tail screen (5) to the end closer to the tail screen (5), the surface height of the cantilever screen tubes decreases row by row, forming a material conveying and sorting surface with a stepped decreasing height; the surface height of each row of cantilever screen tubes is the same, and the main body of a single cantilever screen tube is... There are at least two parallel zigzag cantilevered circular tubes (201). The first ends of the two zigzag cantilevered circular tubes (201) are connected to air nozzles (202) at the same time, and the second ends are closed. The first pipe section near the air nozzle (202) is installed on the frame (3) by a fixing member, and the second pipe section away from the air nozzle (202) serves as a component unit of the material conveying and sorting surface. Each second pipe section in the zigzag cantilevered circular tube (201) has an air intake (204) on its lower surface, and its air nozzle (202) is connected to a ventilation pressure sensor. The feed inlet (6) is located above the material conveying and sorting surface, and the outlet of the tail screen (5) is connected to the discharge port (7); the air outlet direction of the second fan (4) is aligned with the outlet of the tail screen (5), and the air outlet direction of the first fan (1) is aligned with the material conveying and sorting surface so that the air force penetrates the material conveying and sorting surface from bottom to top.

2. The cleaning device with feed rate monitoring function as described in claim 1, characterized in that, The number of parallel broken-line cantilevered circular tubes (201) in a single cantilevered screen tube is two.

3. The cleaning device with feed rate monitoring function as described in claim 1, characterized in that, The spacing between adjacent broken-line cantilevered tubes (201) in the cantilever screen tube is 5~10mm.

4. The cleaning device with feed rate monitoring function as described in claim 1, characterized in that, The spacing between adjacent broken-line cantilevered tubes (201) in the cantilever screen tube is 7~8mm.

5. The cleaning device with feed rate monitoring function as described in claim 1, characterized in that, The second end of the zigzag cantilever tube (201) is closed by a removable sealing plate (203).

6. The cleaning device with feed rate monitoring function as described in claim 1, characterized in that, The fixing component is a horizontal mounting rod (8) with mounting holes. All the cantilever screen tubes in each row of cantilever screen tubes are fixedly installed by a horizontal mounting rod (8). Each zigzag cantilever round tube (201) of each cantilever screen tube passes through a mounting hole on the horizontal mounting rod (8) for fixed positioning.

7. The cleaning device with feed rate monitoring function as described in claim 1, characterized in that, The internal space of the tail screen (5) is divided by multiple parallel vertical screen plates (501), and the top of each vertical screen plate (501) is designed with serrations.

8. The cleaning device with feed rate monitoring function as described in claim 1, characterized in that, The air nozzle (202) is connected to the wind pressure sensor via a hose.

9. A method for monitoring the peanut feed rate of a cleaning device as described in any one of claims 1 to 8, characterized in that, During the process of continuously feeding peanut material mixed with seedlings into the material conveying and sorting surface through the feed inlet (6), vibration is applied to the material conveying and sorting surface and the tail screen (5) to continuously convey the material along the material conveying and sorting surface. At the same time, the first fan (1) and the second fan (4) are kept running. The first fan (1) blows the material conveyed from the feed inlet (6) to the tail screen (5) along the material conveying and sorting surface. Some seedlings fall to the ground through the gap between the zigzag cantilever pipes (201). Some seedlings are discharged from the discharge area by the wind. During the process of the remaining material falling from the material conveying and sorting surface into the tail screen (5), the second fan (4) further wind-sorts the material to separate the peanut pods from the peanut seedlings in the material. The peanut seedlings are discharged from the discharge area by the wind, and the peanut pods fall into the discharge port (7) for subsequent collection. During operation, the air pressure of the air nozzles (202) of different cantilever screen tubes in the stepped cantilever circular tube screen (2) is monitored in real time by the air pressure sensor. Based on the principle that material blockage on the material conveying and sorting surface will cause the air jet to be blocked and thus increase the air pressure, the material blockage detection is realized by analyzing the changes in the monitored air pressure. When material blockage is detected, a feedback signal of excessive peanut feeding or a control signal of equipment corresponding to the blockage relief is issued.

10. A peanut picking combine harvester with a cleaning device as described in any one of claims 1 to 8.

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