A slag removing device of a sugarcane combined harvester

Abstract

This invention discloses a slag removal device for a sugarcane combine harvester. The slag removal device includes a screening chamber, a screening chamber drive, a slag discharge chamber, and a blower. The screening chamber is rotatably mounted on the cutting and conveying mechanism and is provided with a screening channel. A discharge channel communicating with the discharge port of the cutting and conveying mechanism and the screening channel is provided on its side. The screening chamber drive is mounted on the cutting and conveying mechanism and can drive the screening chamber to rotate relative to the cutting and conveying mechanism. The slag discharge chamber is installed above the screening chamber and is provided with a slag discharge channel communicating with the screening channel. The blower is rotatably suspended on the top of the slag discharge chamber and located at the connection between the screening chamber and the slag discharge chamber. This invention's combined slag removal method of rotating the screening chamber and swirling the blower solves the problems of low slag removal efficiency, easy clogging, and poor separation of light slag in existing slag removal devices. It achieves efficient separation of slag and sugarcane, high slag removal efficiency, low impurity residue rate, and effectively reduces sugarcane loss rate while avoiding equipment blockage.

Description

Technical Field

[0001] This invention relates to the field of sugarcane harvesting tools, and in particular to a slag removal device for a sugarcane combine harvester. Background Technology

[0002] Sugarcane is an important economic crop in southern my country, and its harvesting process is characterized by high labor intensity, complex working environment, and strong time sensitivity. With the development of agricultural mechanization, sugarcane combine harvesters have gradually replaced manual harvesting and become the mainstream equipment for sugarcane harvesting. During operation, sugarcane combine harvesters cut and convey sugarcane. In this process, soil, dead leaves, and broken stems from the sugarcane surface will mix into the cut sugarcane. If not removed in time, this will not only increase the difficulty of subsequent sugarcane processing, affecting processing efficiency and product quality, but may also cause equipment blockage during conveying and storage, shortening the equipment's service life.

[0003] In existing technologies, sugarcane combine harvesters' slag removal devices mostly employ simple screening structures, such as fixed screens, relying on the sugarcane's own gravity to separate the slag. However, this structure has significant drawbacks: firstly, the fixed screen allows slag to easily adhere to it, causing blockages in the screening channels and a gradual decrease in slag removal efficiency; secondly, relying solely on gravity screening is ineffective at separating lightweight slag similar in size to sugarcane, such as withered leaves and small stalk fragments, failing to achieve thorough slag removal. Furthermore, some slag removal devices have improperly positioned ventilation systems, failing to create effective airflow guidance and making it difficult to smoothly discharge the slag. Summary of the Invention

[0004] The main objective of this invention is to provide a slag removal device for a sugarcane combine harvester, which aims to solve the technical problems of low slag removal efficiency, easy clogging, and poor separation effect of the slag removal device, so as to achieve efficient separation of slag and sugarcane, while avoiding equipment blockage and sugarcane loss.

[0005] To achieve the above objectives, the present invention proposes a slag removal device for a sugarcane combine harvester. The sugarcane combine harvester includes a frame and a receiving hopper. The sugarcane combine harvester also includes a cutting and conveying mechanism mounted on the frame for cutting sugarcane and conveying the cut sugarcane segments to the slag removal device. The receiving hopper is mounted on the frame and located below the slag removal device. The slag removal device includes: The screening chamber is rotatably mounted on the frame and is provided with a screening channel, and has an inlet channel on the side that communicates with the discharge port of the cutting and conveying mechanism and the screening channel. A screening chamber drive unit is mounted on the cutting conveying mechanism and is capable of driving the screening chamber to rotate relative to the cutting conveying mechanism. A slag discharge bin, installed above the screening bin, and equipped with a slag discharge channel communicating with the screening channel; and An exhaust fan is rotatably suspended from the top of the slag discharge bin and located at the connection between the screening bin and the slag discharge bin. The rotation of the screening bin thoroughly tumbles the sugarcane and slag, shaking off adhering slag and preventing blockage of the screening channel. Combined with the airflow from the exhaust fan, this achieves initial separation of the slag and sugarcane, solving the core problems of low slag removal efficiency and easy clogging in existing fixed screening structures, and enabling basic high-efficiency operation of the slag removal device.

[0006] In an optional embodiment, the screening bin includes a screening cylinder and a discharge hopper. The discharge hopper is installed below the screening cylinder, and the slag discharge bin is located above the screening cylinder. By dividing the screening bin into a screening cylinder and a discharge hopper, the screening cylinder enables the core tumbling screening process, while the discharge hopper precisely guides the deslag-removed sugarcane into the receiving hopper, preventing sugarcane from scattering and causing losses. Simultaneously, it ensures a closer fit between the discharge hopper and the screening cylinder, guaranteeing smooth upward discharge of the slag.

[0007] In an optional embodiment, the discharge channel is provided on the side of the screening cylinder. By placing the discharge channel on the side of the screening cylinder, the cut sugarcane enters the screening channel from the side, preventing the sugarcane from falling vertically and accumulating at the bottom of the screening channel. This ensures that the sugarcane and residue tumble within the screening cylinder, covering the entire channel, improving screening uniformity, and further enhancing residue removal efficiency.

[0008] In an optional embodiment, the screening channel and the slag discharge channel are not on a straight line. This avoids the airflow from the exhaust fan directly drawing sugarcane into the slag discharge channel along the axis of the screening channel, structurally preventing sugarcane from being discharged with the slag, effectively reducing sugarcane loss rate. At the same time, it causes the slag to change direction under the action of airflow, improving the thoroughness of separation between the slag and sugarcane.

[0009] In an optional embodiment, the exhaust fan includes several guide vanes, a driver, and a rotating shaft. The guide vanes are disposed at one end of the rotating shaft and distributed axially to guide sugarcane and impurities to form a swirling flow within the cylinder. The driver is installed at the top of the slag discharge bin, and its output shaft is connected to one end of the rotating shaft. Through the cooperation of the guide vanes, driver, and rotating shaft, a stable swirling airflow is formed within the screening channel. The swirling flow allows the light slag material to be fully suspended and moved upwards to the slag discharge channel, solving the problems of poor airflow guidance and incomplete separation of light slag material in existing exhaust devices, and significantly improving the slag removal efficiency of withered leaves and broken stems from light slag material.

[0010] In an optional embodiment, the discharge channel is inclined toward the side where the exhaust fan is located. After the cut sugarcane enters the screening channel, it moves toward the exhaust fan side under the dual guidance of gravity and the inclined direction, so that the sugarcane and the residue are directly in the core action area of ​​the swirling airflow, avoiding the accumulation of residue at the far end of the screening channel, and further improving the residue removal efficiency and the timeliness of residue discharge.

[0011] In an optional embodiment, the plurality of guide vanes are located at the connection between the screening cylinder and the slag discharge bin. This concentrates the swirling airflow at the connection between the screening cylinder and the slag discharge bin, ensuring that the lightweight slag is drawn into the slag discharge channel by the airflow as soon as it moves upward, preventing the slag from flowing back into the screening channel, while also reducing the energy loss of the swirling airflow and improving the stability and efficiency of the airflow slag removal.

[0012] The present invention also provides a sugarcane combine harvester, which includes a frame, a receiving hopper, a cutting and conveying mechanism, and a slag removal device; the cutting and conveying mechanism is installed on the frame and is used to cut sugarcane and convey the cut sugarcane to the slag removal device; the receiving hopper is installed on the frame and located below the slag removal device; the slag removal device includes: The screening chamber is rotatably mounted on the frame and is provided with a screening channel, and has an inlet channel on the side that communicates with the discharge port of the cutting and conveying mechanism and the screening channel. A screening chamber drive unit is mounted on the cutting conveying mechanism and is capable of driving the screening chamber to rotate relative to the cutting conveying mechanism. A slag discharge bin, installed above the screening bin, and equipped with a slag discharge channel communicating with the screening channel; and An exhaust fan is rotatably suspended from the top of the slag discharge bin and located at the connection between the screening bin and the slag discharge bin. Integrating this high-efficiency slag removal device with a sugarcane combine harvester enables the harvester to perform integrated operations of cutting, conveying, slag removal, and material collection. This solves the technical deficiencies in the slag removal process of existing sugarcane combine harvesters, improves the overall operating efficiency of the machine, reduces the cost of impurity treatment in subsequent sugarcane processing, and extends the service life of the entire machine.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention has high slag removal efficiency and thorough separation. It uses a combined slag removal method of rotating screening chamber and swirling exhaust fan. The rotation of the screening chamber makes the sugarcane and slag fully tumble, shaking off the soil, leaves and other materials attached to the surface of the sugarcane. At the same time, the swirling airflow formed by the exhaust fan efficiently draws the light slag into the slag discharge channel. The slag removal efficiency is high and the residual impurity rate of the sugarcane segment after slag removal is low, which solves the problem of poor separation effect of light slag in the prior art.

[0014] 2. The continuous rotation of the screening chamber generates centrifugal force, which can continuously shake off the slag adhering to the inner wall of the screening channel, ensuring that the screening channel is always unobstructed, avoiding blockage, reducing equipment failure, and extending the service life of the slag removal device and sugarcane combine harvester. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a slag removal device of a sugarcane combine harvester of the present invention, wherein the fixing plate is in a blocking position relative to the mounting base; Figure 2 for Figure 1 The diagram shows the structure of the slag removal device of the sugarcane combine harvester, in which the fixing plate is in a fixed position relative to the mounting base; Figure 3 for Figure 2 Exploded view of the slag removal device of the sugarcane combine harvester; Figure 4 for Figure 1 A schematic diagram of the structure of the fixed base.

[0017] Explanation of icon numbers: label name label name Slag removal device of sugarcane combine harvester 100 Frame 200 receiving hopper 300 Cutting Conveyor 400 Screening bin 110 Screening chamber drive components 120 Slag Discharge Bin 130 exhaust fan 140 Screening cylinder 113 Discharge hopper 114 Screening channel 111 Discharge Channel 112 Slag Discharge Channel 131 The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0020] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention. Example 1

[0021] Reference Figures 1 to 4 The first embodiment of the present invention provides a slag removal device 100 for a sugarcane combine harvester.

[0022] In this embodiment of the invention, the sugarcane combine harvester includes a frame 200, a receiving hopper 300, and a cutting and conveying mechanism 400. The cutting and conveying mechanism 400 is installed on the frame 200 and is used to cut sugarcane and convey the cut sugarcane segments to the slag removal device 100. The receiving hopper 300 is installed on the frame 200 and is located below the slag removal device 100, and is used to receive the sugarcane after slag removal.

[0023] The slag removal device 100 includes a screening chamber 110, a screening chamber drive component 120, a slag discharge chamber 130, and a blower 140.

[0024] Specifically, the screening bin 110 is rotatably mounted on the frame 200 and located at the discharge end of the cutting conveying mechanism 400. This rotatable connection can be achieved using a bearing connection, specifically a deep groove ball bearing, to ensure smooth rotation of the screening bin 110 and reduce wear. The screening bin 110 has an overall columnar structure, with a screening channel 111 running vertically inside. This screening channel 111 is roughly cylindrical. A discharge channel 112 is provided on the side of the screening bin 110. One end of the discharge channel 112 is connected to the discharge port of the cutting conveying mechanism 400, and the other end is connected to the screening channel 111, ensuring that the cut sugarcane can smoothly enter the screening channel 111, where the cut sugarcane contains residue.

[0025] Furthermore, the screening bin 110 includes a screening cylinder 113 and a discharge hopper 114. A discharge channel 112 is located on the side of the screening cylinder 113, and a screening channel 111 is located inside the screening cylinder 113. The discharge hopper 114 is installed below the screening cylinder 113, with its upper end connected to the screening channel 111 and its lower end facing the receiving hopper 300. It is used to accurately guide the de-slag sugarcane into the receiving hopper 300 to prevent scattering. The slag discharge bin 130 is installed above the screening cylinder 111 and connected to its upper end. The slag discharge bin 130 has a slag discharge channel 131 inside, which extends outwards to discharge slag from the equipment.

[0026] Furthermore, the screening cylinder 113 is a cylindrical hollow structure with a diameter of 100-150cm. The inner wall is polished to form a smooth arc surface to prevent the sugarcane segments from getting stuck or damaged during the tumbling process. The screening cylinder 113 has a screening channel 111 that runs through the top and bottom, and the inner diameter of the screening channel 111 matches the inner diameter of the screening cylinder 113. The side wall of the screening cylinder 113 is provided with an inlet channel 112 that communicates with the cutting and conveying mechanism 400 and the screening channel 111.

[0027] Please continue to refer to Figures 1-4 Preferably, the screening channel 111 and the slag discharge channel 131 are not on a straight line, so as to avoid sugarcane being carried into the slag discharge channel by the airflow of the exhaust fan 140 and reduce sugarcane loss. Preferably, the slag discharge channel extends outward at an angle of 30-55° relative to the axis of the screening channel.

[0028] In one embodiment of the present invention, the screening chamber drive 120 is mounted on the frame of the cutting and conveying mechanism 400, and its output shaft is connected to one end of the screening chamber 110 via a coupling, enabling the screening chamber 110 to rotate relative to the cutting and conveying mechanism 400. Setting the rotation speed to 10-15 r / min ensures both effective screening and prevents damage to the sugarcane due to excessive rotation speed. When the screening chamber 110 rotates, the resulting centrifugal force shakes off the residue adhering to the inner wall of the screening channel 111, while simultaneously causing the sugarcane and residue to tumble thoroughly within the screening channel 111, thus improving screening efficiency.

[0029] In one embodiment of the present invention, the exhaust fan 140 is rotatably suspended from the top of the slag discharge bin 130 using a bearing suspension method, allowing it to rotate around its own axis. The exhaust fan 140 is located at the connection between the screening bin 110 and the slag discharge bin 130, ensuring that the airflow can directly act on the slag material in the screening channel 131. Specifically, the exhaust fan 140 includes several guide vanes, a driver, and a rotating shaft. The guide vanes are located at the lower end of the rotating shaft and are evenly distributed along the axial direction of the rotating shaft. The inclination angle of the guide vanes is set to 30-45° to guide the sugarcane and slag material to form a swirling flow in the screening channel. The included angle between adjacent guide vanes is 30-60°. The driver is a variable frequency motor, installed at the top of the slag discharge bin 130. Its output shaft is connected to the upper end of the rotating shaft, which can drive the rotating shaft to rotate the guide vanes. The rotation direction is inconsistent with the rotation direction of the screening bin 110, further improving the swirling effect.

[0030] Preferably, the discharge channel 112 is inclined towards the side where the exhaust fan 140 is located, with an inclination angle of 15-20°. This allows the cut sugarcane, after entering the screening channel 111, to move towards the side where the exhaust fan 140 is located under its own weight and guided by the inclination direction of the discharge channel 112. This facilitates the exhaust fan 140 in pumping the slag to the slag discharge channel, improving slag removal efficiency. Simultaneously, several sets of guide vanes are located at the connection between the screening cylinder 113 and the slag discharge bin 130, ensuring that the swirling flow is concentrated at the upper end of the screening channel 111. This allows light slag to be quickly carried away by the airflow, while heavy sugarcane falls down the screening channel 111 into the discharge hopper.

[0031] Please continue to refer to Figures 1-4 During sugarcane harvesting, the cutting and conveying mechanism 400 cuts the sugarcane in the field and conveys the cut sugarcane segments to its discharge port. The sugarcane segments enter the screening channel of the screening bin 110 through the discharge channel. The screening bin drive 120 and the exhaust fan 140 are started. The screening bin drive 120 drives the screening bin 110 to rotate at a constant speed, causing the sugarcane segments and slag to tumble in the screening channel 111. The exhaust fan's driver drives the rotating shaft to rotate the guide vanes, guiding the air in the screening channel to form a vortex. Light slag is sucked upward into the slag discharge channel by the airflow under the action of the vortex and is finally discharged from the equipment. Heavy sugarcane segments fall down along the screening channel under their own gravity and the guidance of the vortex, and fall into the receiving hopper 300 below through the discharge hopper, completing the slag removal process.

[0032] To prevent clogging, the present invention also includes a water gun assembly, which includes two water gun heads, a water pump and a water tank, wherein the water pump is connected to the water tank and the two water gun heads.

[0033] Understandably, the slag removal device 100 also includes a control module. The control module is electrically connected to the screening chamber drive, the exhaust fan driver, and the water pump, and controls the operation of the screening chamber drive, the exhaust fan driver, and the water pump. Specifically, the control module is used to receive various detection signals, execute preset control logic, and output precise control commands to the screening chamber drive and the exhaust fan driver, so as to realize the coordinated linkage and automated operation of various components of the slag removal device, ensure slag removal efficiency and screening quality, reduce manual intervention costs, and improve the stability and safety of equipment operation.

[0034] Specifically, the control module includes a control unit, a signal acquisition unit, a drive control unit, a power supply unit, and a communication unit. Each unit is integrated on the same circuit board, which is fixedly installed inside the housing of the slag removal device 100. An insulating buffer pad is provided between the circuit board and the housing to prevent vibration and dust generated during the slag removal process from damaging the control module and to extend its service life.

[0035] Control Unit: A microcontroller is used, such as the STM32F103C8T6, which is selected as the core control chip. This chip has the characteristics of fast operation speed, low power consumption and strong anti-interference ability. It can quickly process various signals and output control instructions. The chip has a preset control program stored inside, which is used to realize the coordinated control logic between the screening chamber drive and the exhaust fan. Signal acquisition unit: includes multiple detection sensors and signal conditioning circuit. The detection sensors are used to acquire the operating parameters of the slag removal device 100, specifically including the speed sensor of the screening chamber, the material level sensor inside the screening chamber, the inlet and outlet pressure sensors and temperature sensor of the exhaust fan. The output terminal of each sensor is electrically connected to the signal conditioning circuit. The signal conditioning circuit is used to filter, amplify and convert the analog signals acquired by the sensors into digital signals that can be recognized by the control unit, so as to ensure the accuracy and stability of the acquired signals. Drive control unit: Includes two independent drive circuits, which are electrically connected to the drive components of the screening bin and the driver of the exhaust fan, respectively. The drive circuit uses a MOSFET driver chip, model IR2104, which can convert the weak control signal output by the control unit into a strong drive signal to adjust the speed and direction of the drive components of the screening bin, such as stepper motors and servo motors, as well as the start / stop and speed adjustment of the exhaust fan driver. Power supply unit: The power supply unit adopts a switching power supply module with an input voltage of AC220V and an output voltage of DC12V and DC5V. It provides stable power supply for each unit of the control module, detection sensors, screening chamber drive components and exhaust fan driver. The power supply unit is equipped with overcurrent, overvoltage and undervoltage protection circuits. When the power supply is abnormal, it will automatically cut off the power supply to prevent damage to the control module and other electrical components. Communication Unit: An RS485 communication module is used to establish communication between the control module and an external host computer, such as a PLC or industrial control computer. It can upload the operating parameters of the slag removal device 100 in real time, such as the rotation speed of the screening chamber, the fan speed, the material level, and the equipment temperature. At the same time, it can receive control commands issued by the host computer to realize remote control and parameter debugging, which facilitates centralized management and maintenance of the equipment.

[0036] The water pump is the power source for the water gun assembly, used to draw clean water from the water tank, pressurize it, and deliver it to the two water gun heads for high-pressure rinsing. An industrial-grade water pump matching the operating parameters of the water gun heads is selected, with the following specific requirements: The water pump has a rated head of not less than 15m and a rated flow rate of 5-10m³ / h, which can meet the water supply needs of two water gun heads working simultaneously and has sufficient pressure reserve. The water pump is made of the same material as the water gun head, using corrosion-resistant and wear-resistant materials to avoid wear or corrosion by impurities in the clean water. The control terminal of the water pump is electrically connected to the drive unit of the control module, receiving start / stop and speed adjustment commands output by the control unit to achieve automatic operation.

[0037] In addition, a filter is installed at the water inlet of the water pump to filter out impurities and particles in the clean water, preventing impurities from entering the water pump and causing wear and blockage, while also preventing impurities from clogging the nozzle of the water gun head; the filter has a detachable structure, which is convenient for regular cleaning and maintenance to ensure smooth water supply.

[0038] The water tank is used to store clean water and provide a stable water source for the water pump and water gun head. Its structure and configuration are as follows: The water tank is made of corrosion-resistant and impact-resistant materials such as polyethylene and stainless steel. Its volume is determined according to the cleaning frequency of the equipment and the rated flow rate of the water pump. A volume of 50-100L is usually selected to ensure that the water consumption of a single cleaning operation can be met, while avoiding the water tank being too large and occupying equipment space. The top of the water tank is equipped with a water inlet for adding cleaning water. The water inlet is equipped with a sealing cap to prevent dust and debris from entering the water tank and contaminating the cleaning water. The bottom of the water tank is equipped with a drain outlet for periodically draining sediment and wastewater from the water tank, which facilitates the cleaning and maintenance of the water tank.

[0039] The water tank is equipped with a liquid level sensor, which is connected to the signal acquisition unit of the control module to detect the water level in the tank in real time. This provides water level data to the control unit, enabling automatic monitoring of the water level and dry-pump protection. If the equipment is equipped with an automatic water replenishment device, the water tank can also be connected to a water replenishment pipeline. The control unit can control the opening and closing of the water replenishment valve to achieve automatic replenishment of the water level in the tank, further reducing the amount of manual maintenance required.

[0040] Understandably, the water gun assembly also includes a matching connecting pipeline for connecting the water tank, water pump, and water gun head to deliver clean water. The connecting pipeline is made of high-pressure resistant and corrosion-resistant flexible or rigid pipe, such as high-pressure rubber hose or stainless steel pipe, and its diameter matches the outlet of the water pump and the inlet of the water gun head to ensure smooth water supply and no significant pressure loss. Example 2

[0041] Please continue to refer to Figures 1-4 The second embodiment of the present invention provides a sugarcane combine harvester, which includes a frame 200, a receiving hopper 300, a cutting and conveying mechanism 400, and a slag removal device 100. Since the slag removal device 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0042] The frame 200 is the main support structure of the sugarcane combine harvester. It is made of welded steel and has wheels at the bottom for easy movement of the equipment in the field. The receiving hopper 300 is a bucket-shaped structure that is wider at the top and narrower at the bottom. It is fixedly installed on the frame 200 with bolts and is located below the discharge hopper 114 of the slag removal device 100. It is used to receive sugarcane segments after slag removal. The bottom of the receiving hopper 300 is equipped with a discharge door for easy unloading of the collected sugarcane segments.

[0043] The cutting and conveying mechanism 400 is installed on the frame 200 and is used to cut sugarcane and convey the cut sugarcane segments to the slag removal device 100.

[0044] Please continue to refer to Figures 1-4 This invention combines a screening chamber and guide vanes to achieve full tumbling and efficient cyclone slag removal of sugarcane segments and slag, with a slag removal efficiency of over 95% and a residual impurity rate of only 3% in the sugarcane segments after slag removal. The structural design, such as the screening channel and the slag discharge channel forming a certain angle, the inlet channel being inclined, and the guide vanes being concentrated at the connection point, effectively reduces the sugarcane loss rate.

[0045] Please continue to refer to Figures 1-4In practical use, the cutting blade of the cutting and conveying mechanism 400 cuts the sugarcane in the field into sugarcane segments with a length of 30-50cm. Then, the conveyor belt of the cutting and conveying mechanism 400 conveys the cut sugarcane segments to its discharge port. The sugarcane segments pass through the discharge channel 112 of the slag removal device 100 and, guided by their own gravity and the inclined direction of the discharge channel 112, quickly enter the screening channel 111 of the screening bin 110 to complete the feeding process. The screening bin drive component 120 starts simultaneously, and the sugarcane segments and slag in the screening channel 111 move in a circular motion with the rotation of the screening bin 110, while falling under their own gravity, forming a compound motion of tumbling and falling. During this process, the sugarcane segments and residues are thoroughly and evenly mixed and rolled, the soil and sand adhering to the surface of the sugarcane segments are shaken off, and the residues such as broken stems and sugarcane peels that are similar in size to the sugarcane segments are initially separated from the sugarcane segments. At the same time, the centrifugal force generated by the rotation of the screening chamber 110 continuously shakes off the residues adhering to the inner wall of the screening channel 111, ensuring that the screening channel 111 is always unobstructed. The drive unit 142 of the exhaust fan 140 starts synchronously with the drive unit 120 of the screening chamber, forming a stable and strong swirling airflow at the connection between the screening cylinder 113 and the slag discharge chamber 130. The swirling airflow diffuses from the upper end of the screening channel 111 to the surrounding areas, precisely acting on the tumbling sugarcane segments and residue. Since the density of light residue such as dead leaves, broken stems, and sugarcane peel is much lower than that of sugarcane segments, under the action of the swirling airflow, the light residue overcomes its own gravity and moves upward with the airflow, entering the slag discharge channel 131 of the slag discharge chamber 130; while fine heavy residue such as soil and sand falls from the gaps between sugarcane segments during the tumbling process, moving downward with the sugarcane segments. Subsequently, it can be separated in the receiving hopper 300 by simple gravity screening, achieving efficient and thorough separation of light residue from sugarcane segments.

[0046] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A slag removal device for a sugarcane combine harvester, the sugarcane combine harvester comprising a frame and a hopper, characterized in that, The sugarcane combine harvester also includes a cutting and conveying mechanism, which is mounted on the frame and used to cut sugarcane and convey the cut sugarcane segments to the slag removal device. The receiving hopper is mounted on the frame and located below the slag removal device, which includes: The screening chamber is rotatably mounted on the frame and is provided with a screening channel, and has an inlet channel on the side that communicates with the discharge port of the cutting and conveying mechanism and the screening channel. A screening chamber drive unit is mounted on the cutting conveying mechanism and is capable of driving the screening chamber to rotate relative to the cutting conveying mechanism. A slag discharge bin, installed above the screening bin, and equipped with a slag discharge channel communicating with the screening channel; and An exhaust fan is rotatably suspended from the top of the slag discharge bin and located at the connection between the screening bin and the slag discharge bin.

2. The slag removal device for a sugarcane combine harvester as described in claim 1, characterized in that, The screening chamber includes a screening cylinder and a discharge hopper. The discharge hopper is installed below the screening cylinder, and the slag discharge chamber is located above the screening cylinder.

3. The slag removal device for a sugarcane combine harvester as described in claim 2, characterized in that, The discharge channel is provided on the side of the screening cylinder.

4. A slag removal device for a sugarcane combine harvester as described in claim 2 or 3, characterized in that, The screening channel and the slag discharge channel are not on the same line.

5. A slag removal device for a sugarcane combine harvester as described in claim 2 or 3, characterized in that, The exhaust fan includes several guide vanes, a driver, and a rotating shaft. The guide vanes are disposed at one end of the rotating shaft and distributed along the axial direction to guide sugarcane and impurities to form a swirling flow inside the cylinder. The driver is installed on the top of the slag discharge bin, and its output shaft is connected to one end of the rotating shaft.

6. The slag removal device for a sugarcane combine harvester as described in claim 5, characterized in that, The discharge channel is tilted toward the side where the exhaust fan is located.

7. The slag removal device for a sugarcane combine harvester as described in claim 5, characterized in that, The plurality of guide vanes are located at the connection between the screening cylinder and the slag discharge bin.

8. A sugarcane combine harvester, characterized in that, The sugarcane combine harvester includes a frame, a receiving hopper, a cutting and conveying mechanism, and a slag removal device. The cutting and conveying mechanism is mounted on the frame and is used to cut sugarcane and convey the cut sugarcane to the slag removal device. The receiving hopper is mounted on the frame and located below the slag removal device. The slag removal device includes: The screening chamber is rotatably mounted on the frame and is provided with a screening channel, and has an inlet channel on the side that communicates with the discharge port of the cutting and conveying mechanism and the screening channel. A screening chamber drive unit is mounted on the cutting conveying mechanism and is capable of driving the screening chamber to rotate relative to the cutting conveying mechanism. A slag discharge bin, installed above the screening bin, and equipped with a slag discharge channel communicating with the screening channel; and An exhaust fan is rotatably suspended from the top of the slag discharge bin and located at the connection between the screening bin and the slag discharge bin.

9. A sugarcane combine harvester as described in claim 8, characterized in that, The screening chamber includes a screening cylinder and a discharge hopper. The discharge hopper is installed below the screening cylinder, and the slag discharge chamber is located above the screening cylinder.

10. A sugarcane harvester as claimed in claim 8, characterised in that, The receiving hopper is located below the discharge hopper and is used to receive sugarcane after slag removal.

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