Harvester and residue returning roller device thereof

Abstract

The utility model belongs to the technical field of agricultural mechanical equipment, and particularly relates to a harvester and a residue returning roller device thereof.The residue returning roller device comprises a residue conveying pipeline, a conveying mechanism and a spraying mechanism, the first end of the residue conveying pipeline is connected with a cleaning chamber of the harvester, and the second end of the residue conveying pipeline is connected with the spraying mechanism; the second end of the impurity conveying pipeline is connected with a threshing chamber of the harvester; the conveying mechanism is arranged in the impurity conveying pipeline and is used for conveying impurities entering the impurity conveying pipeline from the first end to the second end; the spraying mechanism is arranged at the second end of the impurity conveying pipeline and used for applying acting force towards the threshing chamber to the impurities reaching the second end. The impurities are conveyed back to the threshing chamber through the conveying mechanism and the impurity conveying pipeline, and the impurities are smoothly and quickly pushed into the threshing chamber through the spraying mechanism, so that the impurities are prevented from being blocked at the joint of the impurity conveying pipeline and the threshing chamber, the speed of the impurities entering the threshing chamber is increased, and the secondary threshing efficiency of the harvester on the impurities is improved.

Description

Technical Field

[0001] This application belongs to the technical field of agricultural machinery and equipment, specifically relating to a harvester and its waste return roller device. Background Technology

[0002] The waste return drum device of the harvester is a key component for handling residual impurities (such as short stalks and incompletely threshed ears) after threshing. Its function is to perform secondary processing on the waste that has not been fully threshed. Specifically, the waste recovery device connects the cleaning chamber and the threshing chamber of the threshing unit, and sends the waste from the cleaning chamber back to the threshing chamber for secondary threshing, so as to improve the cleaning effect of the harvester and reduce grain loss.

[0003] In the prior art, the waste return roller device is arranged on the side of the threshing device. Due to space arrangement issues, the discharge port of the waste return roller device connected to the cleaning chamber is far from the threshing roller in the threshing chamber. Therefore, after the waste reaches the discharge port, it cannot smoothly and quickly enter the threshing chamber, resulting in the accumulation of waste at the discharge port and affecting the secondary threshing efficiency of the waste return roller device. Utility Model Content

[0004] The purpose of this application is to provide a harvester and its waste return drum device to facilitate the smooth and rapid entry of waste into the threshing chamber for secondary threshing.

[0005] To achieve the above objectives, this application provides a waste return drum device for a harvester, the waste return drum device comprising:

[0006] The waste conveying pipe has a first end connected to the cleaning chamber of the harvester and a second end connected to the threshing chamber of the harvester.

[0007] A conveying mechanism is disposed within the waste conveying pipe and is used to convey waste from the first end of the waste conveying pipe to the second end;

[0008] An injection mechanism is disposed at the second end of the impurity conveying pipe and is used to apply a force toward the threshing chamber to the impurities arriving at the second end.

[0009] In some embodiments, the injection mechanism includes a first rotating shaft and a first deflector disposed on the first rotating shaft, the first deflector being disposed between the conveying mechanism and the threshing drum in the threshing chamber.

[0010] In some embodiments, the conveying mechanism includes a second rotating shaft, a second deflector, and a spiral blade. The second deflector and the spiral blade are arranged sequentially on the second rotating shaft along its axial direction. The second rotating shaft is parallel to the first rotating shaft. The first deflector is disposed between the second deflector and the threshing drum.

[0011] In some embodiments, a first guide plate is provided below the first paddle, the first guide plate extends circumferentially toward the second rotating shaft along the first rotating shaft, and a first flow channel for the flow of impurities is formed between the first paddle and the first guide plate. A second guide plate is provided below the second paddle, the second guide plate extends circumferentially toward the second rotating shaft along the second rotating shaft, and a second flow channel is formed between the first paddle and the first guide plate.

[0012] The ends of the first guide plate and the second guide plate that are adjacent to each other are connected as one piece.

[0013] In some embodiments, a gear transmission assembly is connected between the end of the first rotating shaft and the end of the second rotating shaft.

[0014] In some embodiments, the first paddle extends axially along the first pivot, the second paddle extends axially along the second pivot, and the axial length of the first paddle is greater than or equal to the axial length of the second paddle.

[0015] In some embodiments, the impurity conveying pipe includes an upper vertical pipe and a lower vertical pipe, which are detachably connected. The upper vertical pipe is used to connect to the threshing chamber, and the lower vertical pipe is used to connect to the cleaning chamber.

[0016] In some embodiments, the outer peripheral wall of the threshing chamber is provided with a insertion pipe section, the upper vertical pipe includes an insertion pipe section for insertion and engagement with the insertion pipe section, and the injection mechanism is located inside the insertion pipe section.

[0017] In some embodiments, an insertion gap is formed between the inner wall of the insertion tube segment and the outer wall of the insertion tube segment, and a protective plate suitable for insertion into the insertion gap is slidably mounted on the outer wall of the insertion tube segment.

[0018] A second aspect of this application provides a harvester, comprising:

[0019] Cleaning room;

[0020] threshing chamber; and,

[0021] Waste return roller device.

[0022] Through the above technical solution, the harvester and its waste return drum device provided in this application have the following characteristics:

[0023] Beneficial effects:

[0024] After the harvester completes the first threshing process, the resulting impurities enter the cleaning chamber. A conveying mechanism transports these impurities from the cleaning chamber to the threshing chamber via an impurity conveying pipe. Then, a spraying mechanism pushes the impurities at the end of the impurity conveying pipe connected to the de-threshing chamber into the de-threshing chamber for a second threshing process. In this application, after the impurities reach the end of the impurity conveying pipe connected to the de-threshing chamber, the spraying mechanism applies a force towards the threshing chamber, allowing them to smoothly and quickly enter the de-threshing chamber for threshing, thereby improving the harvester's efficiency in secondary threshing of impurities.

[0025] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0027] Figure 1 This is a schematic diagram of the harvester according to a specific embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the waste return roller device according to a specific embodiment of this application;

[0029] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle;

[0030] Figure 4 This is an exploded schematic diagram of the upper vertical pipe according to a specific embodiment of this application;

[0031] Figure 5 for Figure 4 A schematic diagram of the BB section;

[0032] Figure 6 for Figure 5 An enlarged schematic diagram of section C.

[0033] Explanation of reference numerals in the attached figures

[0034] 1000 Harvester; 100 Waste return drum device; 200 Cover plate; 300 Side plate; 400 Insertion pipe section; 500 Cleaning chamber; 600 Threshing chamber; 1. Upper vertical pipe; 2. Lower vertical pipe; 3. First rotating shaft; 4. First paddle; 5. Second rotating shaft; 6. Second paddle; 7. Spiral blade; 8. First guide plate; 9. Second guide plate; 10. Drive wheel; 11. Driven wheel; 12. Protective plate; 13. Insertion pipe section; 14. Fixing clamp. Detailed Implementation

[0035] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0036] The terminology of the harvester 1000 and its waste return roller device 100 according to this application is described below with reference to the accompanying drawings.

[0037] like Figure 1 As shown, a specific embodiment of this application provides a waste return roller device 100 for a harvester 1000. The waste return roller device 100 includes a waste conveying pipe, a conveying mechanism, and an injection mechanism. The first end of the waste conveying pipe is connected to the cleaning chamber 500 of the harvester 1000, and the second end of the waste conveying pipe is connected to the threshing chamber 600 of the harvester 1000. The conveying mechanism is disposed in the waste conveying pipe and is used to convey waste from the first end of the waste conveying pipe to the second end of the waste conveying pipe. The injection mechanism is disposed at the second end of the waste conveying pipe and is used to apply a force toward the threshing chamber 600 to the waste that reaches the second end.

[0038] For the large-feed harvester 1000, one way to improve its cleaning performance is to add a waste return drum device 100 to the original model to perform secondary threshing of waste. Specifically, the waste after the first threshing is sent back to the threshing chamber 600 through the conveying mechanism and waste conveying pipe, and is pushed smoothly and quickly into the threshing chamber 600 by the injection mechanism to avoid the waste from getting blocked at the connection between the waste conveying pipe and the threshing chamber 600, thereby speeding up the speed at which the waste enters the threshing chamber 600 and improving the secondary threshing efficiency of the harvester 1000.

[0039] The harvester 1000 includes a threshing chamber 600 and a cleaning chamber 500. The threshing chamber 600 is equipped with a threshing drum, which is used to thresh the crops. The cleaning chamber 500 is equipped with a cleaning sieve, which is used for the threshed fruits to pass through. The remaining fruits on the cleaning sieve are the impurities, including short stems and unthreshed ears.

[0040] It should be noted that, in the description of this application, unless otherwise stated, the terms "upper," "lower," "left," "right," "front," "back," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In the specific embodiments of this application, "upper," "lower," "left," "right," "front," and "back" are the orientations indicated by the arrows in the accompanying drawings.

[0041] In some embodiments, the cleaning chamber 500 and the threshing chamber 600 are both internal chambers of the harvester 1000. The impurity conveying pipe is located outside the cleaning chamber 500 and the threshing chamber 600, and the cavity of the impurity conveying pipe is connected to both the cleaning chamber 500 and the threshing chamber 600. The conveying mechanism is located inside the cavity of the impurity conveying pipe and provides power for conveying impurities. It pushes the impurities that reach the second end of the impurity conveying pipe toward the injection mechanism, and the injection mechanism then pushes the impurities into the release chamber.

[0042] like Figure 2 and Figure 4 As shown, specifically, the injection mechanism includes a first rotating shaft 3 and a first deflector 4 disposed on the first rotating shaft 3. The first deflector 4 rotates under the drive of the first rotating shaft 3. The conveying mechanism includes a second rotating shaft 5, a second deflector 6 and a spiral blade 7. The second deflector 6 and the spiral blade 7 are arranged sequentially on the second rotating shaft 5 along the axial direction of the second rotating shaft 5. Both the second deflector 6 and the spiral blade 7 rotate under the drive of the second rotating shaft 5. The first deflector 4 is disposed between the second deflector 6 and the threshing drum in the threshing chamber 600.

[0043] First, the second rotating shaft 5 rotates and drives the spiral blade 7 to apply a thrust to the impurities, so that the impurities move from the first end to the second end of the impurity conveying pipe. Then, the second deflector 6 applies a thrust toward the first deflector 4 to the impurities that have reached the second end of the impurity conveying pipe. Finally, the first deflector 4 pushes the impurities into the discharge chamber and into the working range of the threshing drum.

[0044] It should be noted that the specific shapes and working principles of the first rotating shaft 3, the first paddle 4, the second rotating shaft 5, the second paddle 6, and the spiral blade 7 are well known to those skilled in the art and are not part of the core inventive points of this application, so they will not be described in detail here.

[0045] Preferably, the second rotating shaft 5 is parallel to the first rotating shaft 3, the first paddle 4 extends axially along the first rotating shaft 3, and the second paddle 6 extends axially along the second rotating shaft 5. The axial length of the first paddle 4 is greater than or equal to the axial length of the second paddle 6, so that the impurities pushed by the second paddle 6 to the first paddle 4 can be quickly pushed into the threshing chamber 600 by the first paddle 4, thereby avoiding the impurities from clogging between the first paddle 4 and the second paddle 6, and thus accelerating the speed at which the impurities enter the threshing chamber 600.

[0046] Preferably, multiple first-paddle plates 4 are arranged circumferentially along the first rotating shaft 3, and multiple second-paddle plates 6 are arranged circumferentially along the second rotating shaft 5, so as to increase the frequency of the first-paddle plates 4 and the second-paddle plates 6 applying force to the impurities, thereby accelerating the speed at which the impurities enter the threshing chamber 600.

[0047] like Figure 4 and Figure 5 As shown, in some embodiments, a first guide plate 8 is provided below the first paddle 4, the first guide plate 8 extends circumferentially toward the second rotating shaft 5 along the first rotating shaft 3, and a first flow channel for the flow of impurities is formed between the first paddle 4 and the first guide plate 8. A second guide plate 9 is provided below the second paddle 6, the second guide plate 9 extends circumferentially toward the second rotating shaft 5, and a second flow channel is formed between the second paddle 6 and the second guide plate 9.

[0048] The first guide plate 8 is disposed between the first deflector 4 and the wall of the impurity conveying pipe and is fixedly connected to the wall of the impurity conveying pipe. The second guide plate 9 is disposed between the second deflector 6 and the wall of the impurity conveying pipe and is fixedly connected to the wall of the impurity conveying pipe. The second deflector 6 pushes the impurities from the second flow channel to the first flow channel, and the first deflector 4 pushes the impurities from the first flow channel to the threshing chamber 600. The first guide plate 8 and the second guide plate 9 guide the impurities to avoid blockage caused by the accumulation of impurities between the first deflector 4 and the second deflector 6, so that the impurities can smoothly enter the threshing chamber 600, thereby improving the reliability of the impurity return roller device 100.

[0049] Preferably, the adjacent ends of the first guide plate 8 and the second guide plate 9 are connected as one piece to avoid impurities getting stuck in the gap between the first guide plate 8 and the second guide plate 9.

[0050] Furthermore, the first guide plate 8 extends circumferentially along the first rotating shaft 3, and the second guide plate 9 extends circumferentially along the second rotating shaft 5. The first guide plate 8 and the second guide plate 9 are connected as one piece to form a herringbone structure to prevent the material in the threshing chamber 600 from flowing back into the waste conveying pipe.

[0051] Preferably, the second rotating shaft 5 is provided with a drive mechanism, and a gear transmission assembly is connected between the end of the first rotating shaft 3 and the end of the second rotating shaft 5, so that the first rotating shaft 3 and the second rotating shaft 5 share the same drive mechanism, thereby eliminating the need to set up a separate drive mechanism to drive the second rotating shaft 5, thereby reducing the number of components in the waste return roller device 100 and reducing production costs.

[0052] Specifically, the gear transmission assembly includes a driving gear 10 and a driven gear 11 that mesh with each other. The driving gear 10 is coaxially and fixedly connected to the second rotating shaft 5, and the driven gear 11 is coaxially and fixedly connected to the first rotating shaft 3. The second rotating shaft 5 is driven to rotate by the driving mechanism, and the transmission is transmitted to the first rotating shaft 3 through the driving gear 10 and the driven gear 11.

[0053] like Figure 1 and Figure 2 As shown, in some embodiments, the waste conveying pipe includes an upper vertical pipe 1 and a lower vertical pipe 2, which are detachably connected. The upper vertical pipe 1 is used to connect to the threshing chamber 600, and the lower vertical pipe 2 is used to connect to the cleaning chamber 500.

[0054] The harvester 1000 includes a cover plate 200, a side plate 300, and a partition. The cover plate 200 and the side plate 300 enclose the internal space of the harvester 1000. The partition is set in the internal space and divides the internal space into multiple chambers, including a threshing chamber 600 and a cleaning chamber 500. The waste conveying pipe is installed on the outer wall of the side plate 300 by a fixing clamp 14. The first end of the waste conveying pipe is installed on the outer wall of the side plate 300 and communicates with the cleaning chamber 500, that is, the lower vertical pipe 2 is connected to the side plate 300. The second end of the waste conveying pipe is installed on the outer wall of the cover plate 200 and communicates with the threshing chamber 600, that is, the upper vertical pipe 1 is connected to the cover plate 200.

[0055] If maintenance or replacement of mechanisms within the threshing chamber 600 or cleaning chamber 500 is required, the cover plate 200 needs to be opened. In this application, by setting the upper vertical pipe 1 and the lower vertical pipe 2 to be detachably connected, the cover plate 200 can be opened simply by separating the upper vertical pipe 1 and the lower vertical pipe 2, thereby simplifying the operation steps and speeding up the maintenance of the harvester 1000.

[0056] like Figure 1 and Figure 2 As shown, in some embodiments, the outer peripheral wall of the threshing chamber 600 is provided with a insertion pipe section 400, and the upper vertical pipe 1 includes an insertion pipe section 13 for insertion and engagement with the insertion pipe section 400, and the injection mechanism is located inside the insertion pipe section 13.

[0057] Specifically, a first hole is provided on the outer peripheral wall of the threshing chamber 600. The insertion pipe section 400 is located at the first hole and connected to the outer peripheral wall of the threshing chamber 600. After the insertion pipe section 13 is inserted into the insertion pipe section 400, the injection mechanism is brought closer to the threshing drum inside the threshing chamber 600. In other words, the injection mechanism can more easily push the impurities into the threshing chamber 600 and into the working range of the threshing drum. It can be seen that the reliability of the impurity return drum device 100 is significantly improved.

[0058] Furthermore, a second hole is provided on the outer peripheral wall of the cleaning chamber 500, and the lower vertical pipe 2 is connected to the second hole. The lower vertical pipe 2 and the upper vertical pipe 1 are arranged at intervals with the side plate 300 of the harvester 1000 and are connected with a fixing clamp 14.

[0059] Preferably, the upper vertical pipe 1 and the lower vertical pipe 2 are coaxially rotatably connected. In other words, by simply rotating the upper vertical pipe 1 to separate and offset the insertion pipe section 13 from the insertion pipe section 400, the interference of the insertion pipe section 13 on the opening of the cover plate 200 can be avoided. It can be seen that the cover plate 200 can be opened without removing the upper vertical pipe 1 and the lower vertical pipe 2, thereby further simplifying the operation steps and speeding up the maintenance of the harvester 1000.

[0060] like Figure 3 and Figure 6 As shown, preferably, an insertion gap is formed between the inner wall of the insertion tube segment 400 and the outer wall of the insertion tube segment 13, and a protective plate 12 suitable for insertion into the insertion gap is slidably installed on the outer wall of the insertion tube segment 13. After the insertion tube segment 13 is inserted into the insertion tube segment 400, the protective plate 12 is pushed into the insertion gap to make the insertion tube segment 13 and the insertion tube segment 400 tightly connected, thereby preventing the insertion tube segment 13 and the insertion tube segment 400 from separating.

[0061] Furthermore, the end of the protective plate 12 is formed with a flange, which facilitates the push and pull of the protective plate 12 by the operator; the protective plate 12 and the insertion pipe section 13 are connected by bolts, and when it is necessary to push and pull the protective plate 12, the bolts are unscrewed so that the protective plate 12 and the insertion pipe section 13 can slide relative to each other.

[0062] It should be noted that both the upper and lower vertical pipes are processed by welding. Welding refers to the process of using heating, pressurization, or both to achieve atomic or molecular bonding at the contact surface of two or more metal or non-metal materials to form a permanent connection. For example, the upper vertical pipe in this application is formed by welding the insert pipe section 13 and the main pipe section to improve the integrity and sealing of the upper vertical pipe.

[0063] like Figure 1As shown, a specific embodiment of this application also provides a harvester 1000, including a cleaning chamber 500, a threshing chamber 600, and a waste return drum device 100. Since the harvester 1000 adopts all the above embodiments of the waste return drum device 100, the harvester 1000 has all the beneficial effects brought by the waste return drum device 100.

[0064] In this application, the impurities in the cleaning chamber 500 are conveyed to the threshing chamber 600 through the impurity conveying pipe and the spiral blade 7. Then, the impurities are pushed into the working range of the threshing drum in the threshing chamber 600 by the first deflector 4 and the second deflector 6 to achieve secondary threshing of the impurities, thereby accelerating the speed at which the impurities enter the threshing chamber 600 and improving the secondary threshing efficiency of the harvester 1000. By splitting the impurity conveying pipe into an upper vertical pipe 1 and a lower vertical pipe 2 that can rotate relative to each other, the opening steps of the cover plate 200 are simplified, thereby improving the convenience of maintaining the internal mechanism of the harvester 1000.

[0065] It should be noted that the harvester 1000 in this application includes rice harvester 1000, wheat harvester 1000 and combine harvester 1000, etc.

[0066] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A residue re-rolling cylinder arrangement of a harvester, characterized in that, The waste return roller device (100) includes: The waste conveying pipe has a first end connected to the cleaning chamber (500) of the harvester (1000) and a second end connected to the threshing chamber (600) of the harvester (1000). A conveying mechanism is disposed within the waste conveying pipe and is used to convey waste from the first end of the waste conveying pipe to the second end; An injection mechanism is provided at the second end of the impurity conveying pipe and is used to apply a force toward the threshing chamber (600) to the impurities arriving at the second end.

2. The residue re-rolling cylinder device of a harvester according to claim 1, characterized in that, The injection mechanism includes a first rotating shaft (3) and a first paddle (4) disposed on the first rotating shaft (3). The first paddle (4) is disposed between the conveying mechanism and the threshing drum in the threshing chamber (600).

3. The residue re-rolling cylinder arrangement of a harvesting machine according to claim 2, characterized in that, The conveying mechanism includes a second rotating shaft (5), a second deflector (6), and a spiral blade (7). The second deflector (6) and the spiral blade (7) are arranged sequentially on the second rotating shaft (5) along the axial direction of the second rotating shaft (5). The second rotating shaft (5) is parallel to the first rotating shaft (3). The first deflector (4) is disposed between the second deflector (6) and the threshing drum.

4. The residue re-rolling cylinder arrangement of a harvesting machine according to claim 3, characterized in that, A first guide plate (8) is provided below the first paddle (4). The first guide plate (8) extends circumferentially toward the second rotating shaft (5) along the first rotating shaft (3). A first flow channel for the flow of impurities is formed between the first paddle (4) and the first guide plate (8). A second guide plate (9) is provided below the second paddle (6). The second guide plate (9) extends circumferentially toward the second rotating shaft (5). A second flow channel is formed between the first paddle (4) and the first guide plate (8). The ends of the first guide plate (8) and the second guide plate (9) adjacent to each other are connected as one unit.

5. The residue re-rolling cylinder device of the harvesting machine according to claim 3, characterized in that, A gear transmission assembly is connected between the end of the first rotating shaft (3) and the end of the second rotating shaft (5).

6. The residue re-rolling cylinder device of the harvesting machine according to claim 3, characterized in that, The first paddle (4) extends along the axial direction of the first rotating shaft (3), and the second paddle (6) extends along the axial direction of the second rotating shaft (5). The axial length of the first paddle (4) is greater than or equal to the axial length of the second paddle (6).

7. The residue re-rolling cylinder device of a harvester according to claim 1, characterized in that, The waste conveying pipeline includes an upper vertical pipe (1) and a lower vertical pipe (2). The upper vertical pipe (1) and the lower vertical pipe (2) are detachably connected. The upper vertical pipe (1) is used to connect to the threshing chamber (600), and the lower vertical pipe (2) is used to connect to the cleaning chamber (500).

8. The residue re-rolling cylinder device of a harvester according to claim 7, characterized in that, The outer peripheral wall of the threshing chamber (600) is provided with a insertion pipe section (400), and the upper vertical pipe (1) includes an insertion pipe section (13) for insertion and engagement with the insertion pipe section (400), and the injection mechanism is located inside the insertion pipe section (13).

9. The residue re-rolling cylinder arrangement of a harvesting machine according to claim 8, characterized in that, An insertion gap is formed between the inner wall of the insertion tube section (400) and the outer wall of the insertion tube section (13), and a protective plate (12) suitable for insertion into the insertion gap is slidably installed on the outer wall of the insertion tube section (13).

10. A harvester characterized by include: Cleaning room (500); Threshing chamber (600); and The waste return roller device (100) according to any one of claims 1 to 9.

Images