A multiple dryer harvester

Abstract

This invention provides a multi-stage drying harvester, including an engine heat recovery device, a heat exchange device, a first air outlet device, a second air outlet device, and a first fan, achieving multi-stage and efficient drying of grains. The airflow entering through the first fan exchanges heat with the heat collected by the engine heat recovery device at the heat exchange device. Part of the heated airflow passes through the first air outlet device, directly drying the grain at the header, ensuring the grain is dried immediately after cutting. This reduces the moisture content of the grain entering the threshing and cleaning device, preventing moisture accumulation and "secondary moisture reabsorption" inside the machine, thus improving the drying effect. The other part of the heated airflow is discharged through the second air outlet device, further drying the grain transported to the threshing and cleaning device. This multi-stage drying method effectively avoids problems such as poor threshing effect, large losses during cleaning, and pipe blockage, ensuring smooth grain processing and high-quality output.

Description

Technical Field

[0001] This application relates to the technical field of straw-type grain harvesting equipment, and in particular to a multi-stage drying harvester. Background Technology

[0002] During the harvest season for grains such as wheat or rice, especially in areas with high air humidity, dew often adheres to the stalks and ears of grain in the early morning and late evening. This not only increases the resistance of the grain harvester when cutting the stalks, but also leads to significant entrainment losses, seriously affecting harvesting efficiency and quality. Traditional grain harvesters typically lack effective countermeasures, resulting in problems such as difficulty in threshing, severe entrainment losses, or pipe blockages during grain harvesting.

[0003] In addition, although some existing grain harvesters have heating equipment between the threshing and cleaning devices in order to dry the grain by heating, the limited internal space of the machine means that a large amount of hot and humid air cannot be discharged in time, which will cause the grain to "re-moisten" during the cleaning process, which will seriously reduce the drying effect, resulting in poor threshing effect and large losses due to entrainment during cleaning. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a multi-stage drying harvester, comprising a header, an engine, an engine heat recovery device, a threshing and cleaning device, a heat exchange device, a first air outlet, a second air outlet, and a first fan; the first air outlet is disposed on the header; the second air outlet is disposed on the threshing and cleaning device; the first fan is connected to the heat exchange device and is used to introduce the airflow into the heat exchange device; the heat exchange device is connected to the first air outlet, the second air outlet, and the engine heat recovery device respectively; the airflow entering through the first fan exchanges heat with the heat collected by the engine heat recovery device at the heat exchange device to heat the airflow; part of the heated airflow is discharged through the first air outlet to dry the grain at the header, and the other part is discharged through the second air outlet to dry the grain at the threshing and cleaning device.

[0005] In some embodiments of this application, the header includes a reel assembly and a reel support, the reel assembly being rotatably mounted on the reel support; the first air outlet device includes a first air outlet component disposed outside the rotational central axis of the reel assembly, and a second air outlet component disposed below the reel assembly.

[0006] In some embodiments of this application, the first air outlet component includes an air outlet hood; the air outlet hood is disposed outside the rotation center axis of the reel assembly and rotates synchronously with the reel assembly; the air outlet hood is provided with a first drying air outlet.

[0007] In some embodiments of this application, the first air outlet assembly further includes a windbreak assembly, which is disposed inside the air outlet hood and does not rotate synchronously with the reel assembly, thereby blocking the upward airflow.

[0008] In some embodiments of this application, the windproof assembly includes a windproof cover, a windproof bracket, and a load-bearing part; along the axial direction of the rotation center axis of the reel assembly, both ends of the windproof cover are connected to the windproof bracket; the load-bearing part is disposed below the windproof cover and is fixedly connected to the windproof bracket.

[0009] In some embodiments of this application, a flexible shielding portion is provided covering the first drying air outlet, and one end of the flexible shielding portion is fixed to the air outlet cover.

[0010] In some embodiments of this application, the second air outlet assembly includes a plurality of air outlet pipes arranged side by side, and the plurality of air outlet pipes rotate synchronously with the reel assembly via a transmission device.

[0011] In some embodiments of this application, a second drying air outlet is provided on the air outlet pipe.

[0012] In some embodiments of this application, the outer cover of the second drying air outlet is provided with a rigid protrusion; one end of the rigid protrusion is fixed to the air outlet pipe, and the other end is away from the air outlet pipe, so that the airflow inside the air outlet pipe can be discharged through the second drying air outlet.

[0013] In some embodiments of this application, a heating device and a second fan are also included; the heating device is disposed between the first air outlet device, the second air outlet device and the heat exchange device; the second fan is disposed on the cutting table for discharging the dried airflow.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: The multi-stage drying harvester of this application includes an engine heat recovery device, a heat exchange device, a first air outlet device, a second air outlet device, and a first fan, realizing multi-stage and efficient drying of grains, with the following beneficial effects:

[0015] 1. Immediate drying improves threshing effect: The airflow entering through the first fan exchanges heat with the heat collected by the engine heat recovery device at the heat exchange device. Part of the heated airflow passes through the first air outlet device and directly dries the grain at the header, ensuring that the grain is dried immediately after being cut.

[0016] 2. Multiple drying processes for grains: Another part of the heated airflow is discharged through a second air outlet to further dry the grains transported from the header to the threshing and cleaning device. The multiple drying methods effectively avoid problems such as poor threshing effect, large losses due to entrainment during cleaning, and pipe blockage, ensuring smooth grain processing and high-quality output.

[0017] 3. Prevent internal moisture accumulation and "secondary moisture": Preliminary drying at the header reduces the moisture content of the grain entering the threshing and cleaning device, avoiding internal moisture accumulation and "secondary moisture" and improving the drying effect.

[0018] 4. High energy efficiency: By collecting and utilizing the heat generated by the engine to heat the airflow, the engine waste heat is effectively recovered and reused, which not only saves energy but also reduces operating costs and improves overall energy efficiency.

[0019] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this document. Attached Figure Description

[0020] The accompanying drawings, which form part of this document, are used to provide a further understanding of the document. The illustrative embodiments and descriptions herein are used to explain the document and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the airflow direction of a multi-stage drying harvester provided in an exemplary embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the structure of a multi-stage drying harvester provided in an exemplary embodiment of this application;

[0023] Figure 3 yes Figure 2 Enlarged image;

[0024] Figure 4 This is a top view of the cutting table provided in an exemplary embodiment of this application;

[0025] Figure 5 yes Figure 4 Sectional view at point AA.

[0026] In the picture:

[0027] 10. Cutting table; 101. Reel assembly; 102. Reel bracket; 20. First fan; 30. Engine; 40. Engine heat recovery device; 50. Heat exchange device; 60. Heating device; 70. First air outlet device; 701. First air outlet assembly; 7011. Air outlet hood; 7012. First drying air outlet; 7013. Windshield; 7014. Windshield bracket; 7015. Load-bearing part; 7016. Flexible shielding part; 702. Second air outlet assembly; 7021. Air outlet pipe; 7022. Second drying air outlet; 7023. Rigid protrusion; 80. Second air outlet device; 90. Second fan. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0029] During the harvest season for grains such as wheat or rice, especially in areas with high air humidity, dew often adheres to the stalks and ears of grain in the early morning and late evening. This not only increases the resistance of the grain harvester when cutting the stalks, but also leads to significant entrainment losses, seriously affecting harvesting efficiency and quality. Traditional grain harvesters typically lack effective countermeasures, resulting in problems such as difficulty in threshing, severe entrainment losses, or pipe blockages during grain harvesting.

[0030] In addition, although some existing grain harvesters have heating equipment between the threshing and cleaning devices in order to dry the grain by heating, the limited internal space of the machine means that a large amount of hot and humid air cannot be discharged in time, which will cause the grain to "re-moisten" during the cleaning process, which will seriously reduce the drying effect, resulting in poor threshing effect and large losses due to entrainment during cleaning.

[0031] Based on this, an exemplary embodiment of this application provides a multi-stage drying harvester, which includes an engine heat recovery device, a heat exchange device, a first air outlet device, a second air outlet device, and a first fan, thereby achieving multi-stage and efficient drying of grains.

[0032] An exemplary embodiment of this application provides a multi-stage drying harvester, such as... Figures 1 to 2As shown, the harvester includes a header 10, an engine 30, an engine heat recovery device 40, a threshing and cleaning device, a heat exchange device 50, a first air outlet device 70, a second air outlet device 80, and a first fan 20. The first air outlet device 70 is mounted on the header 10; the second air outlet device 80 is mounted on the threshing and cleaning device; the first fan 20 is connected to the heat exchange device 50 and is used to introduce airflow into the heat exchange device 50; the heat exchange device 50 can be a heat exchanger in the prior art, and the engine heat recovery device 40 is a heat recovery device in the prior art. The heat exchange device 50 is connected to the first air outlet device 70, the second air outlet device 80, and the engine heat recovery device 40 respectively; the airflow entering through the first fan 20 interacts with the heat exchange device 50. The engine heat recovery device 40 collects the heat discharged from the engine 30 and exchanges it to heat the airflow. Part of the heated airflow is discharged through the first air outlet device 70 to dry the grain at the header 10, ensuring that the grain is dried immediately after being cut. The preliminary drying at the header 10 reduces the moisture content of the grain entering the threshing and cleaning device, avoiding moisture accumulation and "secondary moisture" inside the machine, and improving the drying effect. The other part is discharged through the second air outlet device 80 to further dry the grain transported from the header 10 to the threshing and cleaning device. The multiple drying methods effectively avoid problems such as poor threshing effect, large loss during cleaning, and pipe blockage, ensuring smooth grain processing and high-quality output.

[0033] Furthermore, the harvester of this application heats the airflow by collecting and utilizing the heat generated by the engine 30, thereby achieving effective recovery and reuse of the waste heat of the engine 30. This not only saves energy but also reduces operating costs and improves overall energy efficiency.

[0034] like Figure 2 As shown, the header 10 includes a reel assembly 101 and a reel support 102, with the reel assembly 101 rotatably mounted on the reel support 102. The first air outlet device 70 includes a first air outlet component 701 disposed outside the rotational central axis of the reel assembly 101, and a second air outlet component 702 disposed below the reel assembly 101. By providing the first air outlet component 701 at the top and the second air outlet component 702 at the bottom on the header 10, when the harvested grain enters between the first air outlet component 701 and the second air outlet component 702, the first air outlet component 701 and the second air outlet component 702 can simultaneously heat and dry the grain, achieving simultaneous heating and drying from both top and bottom, further improving the drying effect.

[0035] like Figure 3As shown, the first air outlet assembly 701 includes an air outlet hood 7011; the air outlet hood 7011 is disposed outside the rotational central axis of the reel assembly 101 and rotates synchronously with the reel assembly 101; the air outlet hood 7011 is provided with a first drying air outlet 7012, thus allowing the upper part of the grain to be dried. For example, multiple first drying air outlets 7012 are arranged at equal intervals on the air outlet hood 7011 to form a uniform and stable airflow for drying the grain. The heated airflow is divided into three paths: the first path is conveyed to one end of the reel assembly 101, then into the air outlet hood 7011, and discharged through the first drying air outlet 7012 to dry the upper part of the grain; the second path is conveyed to the second air outlet assembly 702 and discharged through the second air outlet assembly 702 to dry the lower part of the grain; the third path is conveyed to the threshing and cleaning device for further drying of the grain conveyed there.

[0036] For example, the first drying air outlet 7012 can be circular or rectangular; for example, multiple rectangular first drying air outlets 7012 are evenly arranged on the air outlet hood 7011. The rectangular first drying air outlets 7012 can provide more uniform airflow, so that the airflow is evenly blown onto the grains, thereby improving the drying effect.

[0037] During the rotation of the air outlet hood 7011, when a first drying air outlet 7012 is located at the top of the air outlet hood 7011, the airflow blown from the first drying air outlet 7012 is far away from the grain and therefore cannot be used to dry the grain. At this time, it is necessary to minimize the airflow blown from the first drying air outlet 7012 in order to save airflow. For example, in order to achieve the above purpose, improve drying efficiency, and reduce airflow loss, a flexible shielding part 7016 is provided to cover the first drying air outlet 7012. For example, the flexible shielding part 7016 can be a rubber sheet, with one end fixed to the air outlet hood 7011 and the other end movably disposed. When the first drying air outlet 7012 is located on top of the air outlet hood 7011, the flexible shielding part 7016 covering the first drying air outlet 7012 can adhere tightly to the air outlet hood 7011 under the action of gravity, so as to prevent part of the airflow from escaping from the first drying air outlet 7012; when the first drying air outlet 7012 moves closer to the grain as the air outlet hood 7011 rotates, under the action of gravity, the flexible shielding part 7016 covering the first drying air outlet 7012 moves away from the first drying air outlet 7012, so that the first drying air outlet 7012 opens, allowing a large amount of airflow to blow on the grain, thereby improving the drying efficiency of the grain.

[0038] In one embodiment, in order to reduce airflow loss and waste and prevent a large amount of airflow from being discharged from the first drying air outlet 7012 on the side away from the grain, the first air outlet assembly 701 also includes a wind baffle assembly. The wind baffle assembly is located inside the air outlet hood 7011 and does not rotate synchronously with the reel assembly 101. It is always kept in the same position and can effectively block the upward airflow, prevent excessive airflow from flowing upward, and reduce the airflow rate discharged from the first drying air outlet 7012 on the side away from the grain.

[0039] like Figure 4 and 5 As shown, the windbreak assembly includes a windshield 7013, a windshield bracket 7014, and a load-bearing part 7015. Along the axial direction of the rotation center axis of the reel assembly 101, the windshield 7013 can be made of a flexible material or a material with a certain degree of rigidity. Both ends of the windshield 7013 are connected to the windshield bracket 7014. The windshield bracket 7014 supports the windshield 7013, preventing it from sagging under gravity. Bearings and bearing seats are provided on the rotation center axis of the reel assembly 101 to realize the rotation of the rotation center axis of the reel assembly 101. The wind deflector bracket 7014 can be mounted on the bearing seat or fixedly connected to the outer ring of the bearing to ensure that the wind deflector assembly is always in the same position. The load-bearing part 7015 is located below the wind deflector 7013 and is fixedly connected to the wind deflector bracket 7014. The load-bearing part 7015 has a large weight. Under the action of the load-bearing part 7015, the wind deflector 7013 is always above the load-bearing part 7015. In this way, the wind deflector 7013 can block the upward airflow and reduce the airflow discharged from the first drying air outlet 7012 on the side away from the grain.

[0040] In one embodiment, such as Figure 3 and 4 As shown, the second air outlet assembly 702 includes multiple air outlet pipes 7021 arranged side by side. The axial direction of the multiple air outlet pipes 7021 is parallel to the axial direction of the rotation center axis of the reel assembly 101. The multiple air outlet pipes 7021 rotate synchronously with the reel assembly 101 through a transmission device. For example, five air outlet pipes 7021 can be arranged side by side, and a second drying air outlet 7022 is provided on the air outlet pipes 7021. In this way, airflow can be blown from the bottom to the top to dry the bottom of the grain, further drying the grain and improving the drying effect. At the same time, the rotation direction of the air outlet pipes 7021 is matched with the grain feeding direction. When the air outlet pipes 7021 rotate, they can assist in conveying the grain and accelerate the grain into the machine.

[0041] To prevent grain or straw from clogging the second drying air outlet 7022 and to increase the friction between the outlet and the grain for easier transport, a rigid protrusion 7023 is provided on the outer surface of the second drying air outlet 7022. One end of the rigid protrusion 7023 is fixed to the air outlet pipe 7021, and the other end is away from the air outlet pipe 7021, allowing the airflow inside the air outlet pipe 7021 to be discharged through the second drying air outlet 7022. The rigid protrusion 7023 can also guide the ejected airflow, ensuring that the airflow is evenly and stably blown onto the grain.

[0042] To increase the airflow temperature and improve the drying effect, the harvester also includes a heating device 60 and a second fan 90. The heating device 60 is located between the first air outlet device 70, the second air outlet device 80, and the heat exchange device 50. The heating device 60 can be a heating wire as used in the prior art. The heating device 60 can heat the airflow after heat exchange, thereby increasing the airflow temperature and improving the drying effect. The second fan 90 is located on the header 10 and is used to discharge the dried airflow. The second fan 90 can promptly discharge the airflow with a certain amount of moisture after drying from the header 10, thus preventing the grain from "re-moistening".

[0043] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0044] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0045] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, the intent of this application also includes these modifications and variations.

Claims

1. A multi-stage drying harvester, characterized in that, The system includes a header, an engine, an engine heat recovery device, a threshing and cleaning device, a heat exchange device, a first air outlet, a second air outlet, and a first fan. The first air outlet is mounted on the header; the second air outlet is mounted on the threshing and cleaning device; the first fan is connected to the heat exchange device and is used to introduce airflow into the heat exchange device; the heat exchange device is connected to the first air outlet, the second air outlet, and the engine heat recovery device; the airflow entering through the first fan exchanges heat with the heat collected by the engine heat recovery device at the heat exchange device to heat the airflow; part of the heated airflow is discharged through the first air outlet to dry the grain at the header, and the other part is discharged through the second air outlet to dry the grain at the threshing and cleaning device. The header includes a reel assembly and a reel support, the reel assembly being rotatably mounted on the reel support; the first air outlet device includes a first air outlet component disposed outside the rotational central axis of the reel assembly, and a second air outlet component disposed below the reel assembly; the first air outlet component includes an air outlet hood; the air outlet hood is disposed outside the rotational central axis of the reel assembly and rotates synchronously with the reel assembly; the air outlet hood is provided with a first drying air outlet; the first drying air outlet is covered with a flexible shielding part, one end of the flexible shielding part being fixed to the air outlet hood; The second air outlet assembly includes multiple air outlet pipes arranged side by side, and the multiple air outlet pipes rotate synchronously with the reel assembly through a transmission device; a second drying air outlet is provided on the air outlet pipe.

2. The multi-stage drying harvester according to claim 1, characterized in that, The first air outlet assembly also includes a wind deflector assembly, which is disposed inside the air outlet hood and does not rotate synchronously with the reel assembly, thereby blocking the upward airflow.

3. The multi-stage drying harvester according to claim 2, characterized in that, The windproof assembly includes a windproof cover, a windproof bracket, and a load-bearing part; along the axial direction of the rotation center axis of the reel assembly, both ends of the windproof cover are connected to the windproof bracket; the load-bearing part is located below the windproof cover and is fixedly connected to the windproof bracket.

4. The multi-stage drying harvester according to claim 1, characterized in that, The outer cover of the second drying air outlet is provided with a rigid protrusion; one end of the rigid protrusion is fixed to the air outlet pipe, and the other end is away from the air outlet pipe, so that the airflow inside the air outlet pipe can be discharged through the second drying air outlet.

5. The multi-stage drying harvester according to claim 1, characterized in that, It also includes a heating device and a second fan; the heating device is disposed between the first air outlet device, the second air outlet device and the heat exchange device; the second fan is disposed on the cutting table and is used to discharge the dried airflow.

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