Header, threshing and cleaning simultaneous drying type harvester

Abstract

This invention provides a harvester with simultaneous drying of header, threshing, cleaning, and drying functions. The harvester includes an engine heat recovery device, a heat exchange device, an exhaust pipe, and a first fan. Airflow entering through the first fan exchanges heat with heat collected from the engine exhaust by the engine heat recovery device at the heat exchange device. Part of the heated airflow is discharged through the exhaust pipe, directly drying the grain at the header, ensuring the grain is dried immediately after cutting. The other part of the heated airflow is transported to the threshing and cleaning device for further drying of the grain transported from the header. This dual drying method effectively avoids problems such as poor threshing effect, large losses during cleaning, and pipe blockage. Preliminary drying at the header reduces the moisture content of the grain entering the threshing and cleaning devices, preventing moisture accumulation and "secondary moisture reabsorption" inside the machine, thus improving the drying effect.

Description

Technical Field

[0001] This application relates to the technical field of straw-type grain harvesting equipment, and in particular to a harvester that simultaneously harvests, threshes, cleans, and dries grains. Background Technology

[0002] During the harvest season for grains such as wheat or rice, some areas experience high air humidity, especially in the early morning and evening, often resulting in dew adhering to the grain stalks and ears. This not only increases the resistance of grain harvesters when cutting the stalks but also leads to significant entrapment losses, severely impacting harvesting efficiency and quality. Traditional grain harvesters typically lack effective countermeasures, leading to problems such as difficulty in threshing, severe entrapment losses, or pipe blockages during 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 header, threshing, cleaning, and drying simultaneous drying harvester, comprising a header, an engine driving the harvester, an engine heat recovery device, a threshing and cleaning device, a heat exchange device, an exhaust pipe, and a first fan; the exhaust pipe is disposed on the header; 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 both the exhaust pipe 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 exhaust pipe to dry the grain at the header, and the other part is transported to the threshing and cleaning device to dry the threshed grain.

[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 exhaust pipe is located around the central axis of rotation of the reel assembly.

[0006] In some embodiments of this application, the heat exchange device includes a first heat exchanger and a second heat exchanger that are interconnected, and the engine heat recovery device is connected to the second heat exchanger.

[0007] In some embodiments of this application, the upper part of the reel assembly is provided with an adsorption hood, and the adsorption hood is connected to the first heat exchanger through a second fan; the first fan is connected to the first heat exchanger.

[0008] In some embodiments of this application, a drying and filtering device is also included, which is disposed between the second fan and the first heat exchanger, for filtering and drying the airflow collected by the adsorption hood.

[0009] In some embodiments of this application, a heating device is also included, which is disposed between the exhaust pipe and the heat exchange device.

[0010] In some embodiments of this application, the adsorption cover includes an arc-shaped top, a bottom, and a side portion surrounding the top and the bottom, and the bottom is provided with a plurality of adsorption holes.

[0011] In some embodiments of this application, four exhaust pipes are included, each of which is provided with multiple drying air outlets, and the exhaust direction of the drying air outlets is set away from the rotation center axis of the reel.

[0012] In some embodiments of this application, the drying air outlet is rectangular.

[0013] In some embodiments of this application, a solenoid valve is provided on the exhaust pipe.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: The header, threshing, cleaning and drying simultaneous drying harvester of this application includes an engine heat recovery device, a heat exchange device, an exhaust pipe and a first fan, which realizes efficient drying of grains, and the beneficial effects are as follows:

[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 is discharged through the exhaust pipe, directly drying the grain at the header, ensuring that the grain is dried immediately after being cut.

[0016] 2. The grain is dried twice: another part of the heated airflow is transported to the threshing and cleaning device to further dry the grain that was transported from the header to the threshing and cleaning device. The dual drying method effectively avoids problems such as poor threshing effect, large loss due to entrainment during cleaning and pipe blockage, and ensures smooth processing and high-quality output of grain.

[0017] 3. Prevent internal moisture accumulation and "secondary moisture reabsorption": By performing preliminary drying at the header, the moisture content of the grain entering the threshing and cleaning devices is reduced, avoiding internal moisture accumulation and "secondary moisture reabsorption" 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 circulation of a header, threshing, cleaning and drying harvester provided in an exemplary embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the structure of a header, threshing, cleaning and drying harvester provided in an exemplary embodiment of this application;

[0023] Figure 3 yes Figure 2 Enlarged view of the dashed box;

[0024] Figure 4 This is a schematic diagram of the structure of the cutting table provided in an exemplary embodiment of this application.

[0025] In the picture:

[0026] 10. Header; 101. Reel assembly; 102. Reel support; 103. Adsorption hood; 1031. Adsorption hole; 20. Engine; 30. Engine heat recovery device; 40. Heat exchanger; 401. First heat exchanger; 402. Second heat exchanger; 50. Exhaust pipe; 501. Drying air outlet; 60. First fan; 70. Heating device; 80. Drying and filtering device; 90. Second fan; 10A. Threshing and cleaning device. Detailed Implementation

[0027] 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.

[0028] During the harvest season for grains such as wheat or rice, some areas experience high air humidity, especially in the early morning and evening, often resulting in dew adhering to the grain stalks and ears. This not only increases the resistance of grain harvesters when cutting the stalks but also leads to significant sludge loss, severely impacting harvesting efficiency and quality. Traditional grain harvesters typically lack effective countermeasures, leading to problems such as difficulty in threshing, severe sludge buildup, or pipe blockage during harvesting.

[0029] 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.

[0030] Based on this, an exemplary embodiment of this application provides a harvester with simultaneous drying of header, threshing, cleaning, and drying functions. The harvester includes an engine heat recovery device, a heat exchange device, an exhaust pipe, and a first fan. 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 is discharged through the exhaust pipe, directly drying the grain at the header, ensuring that the grain is dried immediately after being cut. The other part of the heated airflow is transported to the threshing and cleaning device for further drying of the grain transported from the header to the threshing and cleaning device. This dual 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. The preliminary drying at the header reduces the moisture content of the grain entering the threshing and cleaning devices, avoiding moisture accumulation and "secondary moisture" inside the machine, thus improving the drying effect. By collecting and utilizing the heat generated by the engine to heat the airflow, effective recovery and reuse of engine waste heat is achieved, which not only saves energy but also reduces operating costs and improves overall energy efficiency.

[0031] An exemplary embodiment of this application provides a harvester with simultaneous header, threshing, cleaning, and drying functions, such as... Figure 1 and 2As shown, the harvester includes a header 10, an engine 20 driving the harvester, an engine heat recovery device 30, a threshing and cleaning device 10A, a heat exchange device 40, an exhaust pipe 50, and a first fan 60; the exhaust pipe 50 is mounted on the header 10; the first fan 60 is connected to the heat exchange device 40 and is used to introduce airflow into the heat exchange device 40; the heat exchange device 40 is connected to both the exhaust pipe 50 and the engine heat recovery device 30; the airflow entering through the first fan 60 exchanges heat with the heat collected by the engine heat recovery device 30 at the heat exchange device 40, thereby heating the airflow; the heated airflow... Part of the grain is discharged through the exhaust pipe 50 to dry the grain at the header 10, ensuring that the grain is dried immediately after being cut. The initial drying at the header 10 reduces the moisture content of the grain entering the threshing and cleaning device 10A, avoiding moisture accumulation and "secondary re-moistening" inside the machine, thus improving the drying effect. The other part is conveyed to the threshing and cleaning device 10A for further drying of the grain conveyed from the header 10. This dual 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.

[0032] The gas collected by the engine heat recovery device 30 is cooled down after heat exchange and can be directly discharged into the air. By collecting and utilizing the heat generated by the engine 20 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.

[0033] like Figure 2 and 3 As shown, the header 10 includes a reel assembly 101 and a reel support 102. The reel assembly 101 is rotatably mounted on the reel support 102. The exhaust pipe 50 is located around the central axis of rotation of the reel assembly 101. Heated airflow is delivered to one end of the reel assembly 101 through a rotary seal, and then distributed to the exhaust pipe 50 through multiple manifolds. During harvesting, the reel assembly 101 rotates simultaneously with the exhaust pipe 50, so that the heated airflow can continuously blow onto the cut grain, accelerating the evaporation of moisture from the grain and drying it.

[0034] To enhance the drying effect, there can be multiple exhaust pipes 50. For example, one embodiment includes four exhaust pipes 50. The four exhaust pipes 50 are evenly arranged around the rotation center axis of the reel assembly 101. Each of the four exhaust pipes 50 is provided with multiple drying air outlets 501. The exhaust direction of the drying air outlets 501 is away from the rotation center axis of the reel. When the exhaust pipes 50 rotate, the heated airflow discharged through the drying air outlets 501 can be continuously blown onto the grain to dry the grain.

[0035] In one embodiment, such as Figure 3 As shown, the drying air outlet 501 is rectangular, and multiple rectangular drying air outlets 501 are evenly arranged on the exhaust pipe 50. The rectangular drying air outlets 501 can provide a more uniform airflow, allowing the airflow to be evenly blown onto the grains, thus improving the drying effect. To improve drying efficiency and reduce airflow loss, a solenoid valve is installed on the exhaust pipe 50 near the manifold to control the exhaust pipe 50 to not exhaust when it is away from the grains, saving airflow and improving drying efficiency. The solenoid valve can control the exhaust pipe 50 to exhaust intermittently. When the exhaust pipe 50 rotates to the side closer to the grains, the solenoid valve controls the exhaust pipe 50 to exhaust; when the exhaust pipe 50 rotates to the side away from the grains, the solenoid valve closes the airflow channel, controlling the exhaust pipe 50 to not exhaust. In this way, only the exhaust pipe 50 close to the grains exhausts air to dry the grains, while the exhaust pipe 50 away from the grains does not exhaust, which can reduce airflow waste and save airflow. For example, since the rotational speed of the reel assembly 101 is controllable, the on / off state of the solenoid valve can be controlled by a certain time interval to control whether the drying air outlet exhausts air. Alternatively, a contact-type energization method can be used to control the solenoid valve on the rotating exhaust pipe 50. The contact-type terminals of the solenoid valve are respectively installed on the exhaust pipe 50 and the reel support 102. When the exhaust pipe 50 rotates to a position close to the grain, the contact-type terminals of the solenoid valve contact, forming a circuit, opening the exhaust pipe 50, and allowing the hot airflow to be discharged through the drying air outlet 501 to dry the grain at the header 10.

[0036] In one embodiment, the exhaust pipe 50 is a rectangular pipe. The rectangular pipe exhaust pipe 50 facilitates the processing of the drying air outlet 501 while reducing airflow resistance and improving exhaust efficiency.

[0037] In one embodiment, to further save energy, the heat exchange device 40 includes a first heat exchanger 401 and a second heat exchanger 402 that are interconnected. Both the first heat exchanger 401 and the second heat exchanger 402 are heat exchangers in the prior art, and the engine heat recovery device 30 is connected to the second heat exchanger 402. Figure 4As shown, the upper part of the reel assembly 101 is covered with an adsorption hood 103, which can be fixed on the reel bracket 102. The adsorption hood 103 includes an arc-shaped top, a bottom, and sides surrounding the top and bottom. Multiple adsorption holes 1031 are provided on the bottom. The adsorption hood 103 is connected to the first heat exchanger 401 through a second fan 90; the first fan 60 is also connected to the first heat exchanger 401; a drying and filtering device 80 is disposed between the second fan 90 and the first heat exchanger 401 to filter and dry the airflow collected by the adsorption hood 103. Thus, the adsorption hood 103 can absorb the airflow after drying the grain through the adsorption holes 1031 at the bottom, accelerating the airflow circulation and further improving the drying efficiency. At the same time, the airflow after drying the grain also contains a certain amount of residual heat. Under the action of the second fan 90, this part of the airflow is dried and filtered by the drying and filtering device 80 and then transported to the first heat exchanger 401. It exchanges heat with the airflow entering the first heat exchanger 401 through the first fan 60 for the first time, achieving the purpose of preheating the airflow entering the first heat exchanger 401. The recovered heat can be further utilized to reduce energy consumption.

[0038] The preheated airflow enters the second heat exchanger 402 through a pipe, where it undergoes a second heat exchange with the heat generated by the engine 20, further heating the airflow. After the second heat exchange, the airflow is transported to the heating device 70 through a pipe. The heating device 70 is located between the exhaust pipe 50 and the heat exchanger 40. The heating device 70 can further heat the airflow and increase its temperature to achieve a better drying effect.

[0039] The header, threshing, cleaning, and drying harvester of this application achieves secondary heat recovery and reuse by collecting and utilizing the dried airflow and exchanging it with the airflow introduced into the machine for the first heat exchange; and by collecting and utilizing the heat generated during the operation of the engine 20 and exchanging it with the airflow introduced into the machine for the second heat exchange, making full use of the heat generated by the engine 20 and achieving energy recovery and reuse. At the same time, part of the airflow after the two heat exchanges is discharged through the exhaust pipe 50 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 10A, avoiding moisture accumulation and "secondary moisture" inside the machine, and improving the drying effect; the other part is conveyed to the threshing and cleaning device 10A for further drying of the grain conveyed from the header 10. The dual drying method effectively extends the drying time of the grain and effectively avoids problems such as poor threshing effect, large losses during cleaning, and pipe blockage, ensuring smooth grain processing and high-quality output.

[0040] 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.

[0041] 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.

[0042] 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 harvester with simultaneous header, threshing, cleaning, and drying functions, characterized in that, The machine includes a header, an engine driving the harvester, an engine heat recovery device, a threshing and cleaning device, a heat exchange device, an exhaust pipe, and a first fan. 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 both the exhaust pipe 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 exhaust pipe to dry the grain at the header, and the other part is transported to the threshing and cleaning device to dry the threshed grain. The header includes a reel assembly and a reel support, the reel assembly being rotatably mounted on the reel support; the exhaust pipe is located around the central axis of rotation of the reel assembly; the exhaust pipe is provided with multiple drying air outlets; The upper part of the reel assembly is covered with an adsorption hood, which is connected to the first heat exchanger via a second fan; the first fan is connected to the first heat exchanger. The adsorption cover includes an arc-shaped top, a bottom, and a side portion surrounding the top and bottom, and the bottom is provided with multiple adsorption holes; By collecting and utilizing the heat generated during the operation of the engine and exchanging it with the airflow introduced into the harvester for secondary heat exchange, heat recovery and reuse are achieved; by collecting and utilizing the dried airflow and exchanging it with the airflow introduced into the harvester for primary heat exchange, secondary heat recovery and reuse are achieved.

2. The harvester with simultaneous header, threshing, cleaning, and drying as described in claim 1, characterized in that, The heat exchange device includes a first heat exchanger and a second heat exchanger that are interconnected, and the engine heat recovery device is connected to the second heat exchanger.

3. The harvester with simultaneous header, threshing, cleaning, and drying as described in claim 1, characterized in that, It also includes a drying and filtration device, which is disposed between the second fan and the first heat exchanger, for filtering and drying the airflow collected by the adsorption hood.

4. The harvester with simultaneous header, threshing, cleaning, and drying as described in claim 1, characterized in that, It also includes a heating device, which is disposed between the exhaust pipe and the heat exchange device.

5. The harvester with simultaneous header, threshing, cleaning, and drying as described in claim 1, characterized in that, It includes four exhaust pipes, and the exhaust direction of the dry air outlet is set away from the rotation center axis of the reel assembly.

6. The harvester with simultaneous header, threshing, cleaning, and drying as described in claim 1, characterized in that, The drying air outlet is rectangular.

7. The harvester with simultaneous header, threshing, cleaning, and drying as described in claim 1, characterized in that, The exhaust pipe is equipped with a solenoid valve.

Images