Gas transmission assembly for prefilter, air filtering system and grain combine harvester

Abstract

The utility model relates to the technical field of raised dust emission of grain combine harvesters, in particular to an air transmission assembly for a prefilter, an air filtering system and a grain combine harvester. In the gas transmission assembly for the prefilter, a first gas transmission pipe is arranged to be capable of communicating a main gas inlet pipe of an engine with a gas inlet of an air compressor for the engine; an air outlet of the air compressor for the engine is communicated with the air storage tank through a second air delivery pipe; the air compressor for the engine is used for being assembled on an engine body and can be driven by the engine body to operate. The third air conveying pipe is arranged to enable the air storage tank to be communicated with an automatic ash discharging device of the automatic prefilter, and the air storage tank is configured to be capable of storing air and intermittently conveying the air to the automatic ash discharging device of the automatic prefilter. The gas transmission assembly for the prefilter is matched with an automatic prefilter, the problem of multiple times of parking maintenance due to the power supply problem is solved, and therefore harvesting operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the grain combine harvester dust emission technical field, concretely relates to prefilter gas feeding assembly, air filtration system and grain combine harvester. BACKGROUND

[0002] When the grain combine harvester is harvesting in the field, a large amount of dust will be generated around the grain combine harvester. In order to prevent the dust from entering the engine body through the engine total intake pipe, an automatic prefilter and a filter are usually arranged upstream of the total intake pipe. After the air is filtered by the automatic prefilter and the filter in turn, it will enter the total intake pipe. However, as the grain combine harvester operates, a large amount of particulate impurities will be stored in the automatic prefilter, and the capacity of the automatic prefilter is limited, so the particulate impurities in the automatic prefilter need to be discharged regularly.

[0003] When discharging the particulate impurities in the automatic prefilter, a special air supply device needs to be started. The special air supply device is only used with the automatic prefilter, and the special air supply device includes a special air pump and a special battery. The special air pump is in communication with the automatic ash discharge device of the automatic prefilter, and the special air pump can deliver air with high pressure to the automatic ash discharge device of the automatic prefilter, which can drive the particulate impurities to be discharged from the automatic ash discharge device of the automatic prefilter. However, under continuous operation conditions, a large amount of particulate impurities can be easily stored in the automatic prefilter in a short time, so the special air pump will be frequently started and operated.

[0004] The electric energy of the special air pump only comes from the special battery, and the special air pump is frequently started and has a large power, so the special battery consumes electricity quickly, which causes the grain combine harvester to stop and maintain multiple times due to power supply problems, that is, the operator needs to regularly check the electricity of the special battery and regularly replace the special battery with full electricity. Under continuous operation conditions, stopping and maintaining multiple times due to power supply problems (i.e. checking or replacing the special battery multiple times) will reduce the harvesting efficiency, especially in the harvesting season, the time loss caused by multiple stop and maintenance may seriously reduce the agricultural production efficiency.

[0005] In short, the special air supply device is used with the automatic prefilter, which will cause multiple stop and maintenance due to power supply problems, thereby reducing the harvesting efficiency. UTILITY MODEL CONTENTS

[0006] The utility model aims at solving the following technical problems: the special air supply device is used with the automatic prefilter, which will cause multiple stop and maintenance due to power supply problems, thereby reducing the harvesting efficiency.

[0007] In order to achieve the above object, the utility model provides a kind of gas feeding assembly for prefilter, which includes engine air compressor, air tank, first gas pipe, second gas pipe and third gas pipe;First gas pipe is set to be able to supply engine total intake pipe with the air intake of engine air compressor communication, to make engine total intake pipe can send air to engine air compressor;The air outlet of engine air compressor is communicated with air tank by second gas pipe;Engine air compressor is used to be assembled in engine body and can be driven by engine body to operate, to make engine air compressor can pump air to air tank;Third gas pipe is set to be able to supply air tank with automatic ash removal device of automatic prefilter communication, air tank is configured to be able to store air and can send air to automatic ash removal device of automatic prefilter.

[0008] In some embodiments, a one-way air feeding pressure regulating valve is provided on the second gas pipe, and the pressure regulating valve is configured to allow air in the second gas pipe to flow to the air tank at a constant air pressure;And / or, the inner diameter of the first gas pipe is greater than the inner diameters of the second gas pipe and the third gas pipe.

[0009] In some embodiments, the gas feeding assembly for prefilter further includes a first branch pipe and a second branch pipe, the air inlet end of the first branch pipe and the air inlet end of the second branch pipe are connected to the air outlet end of the third gas pipe through a three-way valve;The air outlet end of the first branch pipe can communicate with the automatic ash removal device of the automatic prefilter, and a quick connector with a stop valve is installed at the air outlet end of the second branch pipe, and the quick connector is used to connect a pneumatic tool.

[0010] In some embodiments, the second gas pipe and the third gas pipe are connected through a pipe fitting connector, and the pipe fitting connector is used to connect to an engine support.

[0011] In some embodiments, the pipe fitting connector includes a first connecting block and a second connecting block, and the second gas pipe and the third gas pipe are fixed through the first connecting block and the second connecting block;The first connecting block and the second connecting block are connected through bolts, and the first connecting block is used to connect to the engine support.

[0012] The utility model also provides an air filtering system, which includes an automatic prefilter, a filter, an engine total intake pipe and the gas feeding assembly for prefilter of the above embodiments;The air outlet of the automatic prefilter is communicated with the air inlet of the filter, and the engine total intake pipe is used to communicate the air outlet of the filter with the air inlet of the engine body.

[0013] In some embodiments, a first pipe joint is provided on the engine total intake pipe, and the air inlet end of the first gas pipe is fixedly sleeved on the first pipe joint;A second pipe joint is provided at the air inlet of the engine air compressor, and the air outlet end of the first gas pipe is fixedly sleeved on the second pipe joint.

[0014] The utility model also provides a grain combine, the grain combine includes engine body and air filter system of above -mentioned embodiment, the air outlet of filter communicates with the air inlet of engine body through engine total air inlet pipe, the engine air compressor is assembled in engine body, engine body can drive engine air compressor operation.

[0015] In some embodiments, the grain combine further comprises a support frame, the filter and the automatic pre-filter are installed on the support frame.

[0016] In some embodiments, the support frame comprises a base frame and a connecting rod, the filter is fixedly installed on the top of the base frame, the bottom of the base frame is provided with a plurality of spaced apart supporting legs, the connecting rod is fixedly connected to the top of the base frame, and the top end of the connecting rod is fixedly connected to the side of the automatic pre-filter. The base frame can support the filter, and the connecting rod can fix the automatic pre-filter.

[0017] The above technical solution of the utility model has the following technical effects:

[0018] The engine air compressor can be assembled in the engine body and driven to operate by the engine body, so that the engine air compressor can compress the air from the engine total air inlet pipe and pump it into the air tank. The air tank can intermittently deliver air to the automatic ash discharge device of the automatic pre-filter, so that the automatic pre-filter can discharge particulate matter impurities inside the automatic pre-filter with the help of the air. Since the driving force of the engine air compressor comes from the engine body, the engine body can provide continuous power to the engine air compressor, so under continuous operation conditions, the engine air compressor can be continuously driven by the engine body without stopping, so that there is always enough air in the air tank to provide for the automatic pre-filter, and there is no need to stop multiple times for maintenance to ensure energy supply. Therefore, the pre-filter gas supply assembly of the utility model is matched with the automatic pre-filter, and there is no problem of multiple stop maintenance due to power supply, thereby improving the harvesting efficiency. Especially in the season of rush harvesting, the agricultural production efficiency will not be seriously reduced due to time loss. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the installation schematic view of the pre-filter gas supply assembly in an embodiment of the utility model;

[0020] Figure 2 is the installation schematic view of the pre-filter gas supply assembly in an embodiment of the utility model;

[0021] Figure 3 is the installation schematic view of the pre-filter gas supply assembly in an embodiment of the utility model;

[0022] Figure 4 is Figure 3 is a partial enlarged view of part A in figure 1;

[0023] Figure 5 is a sectional view of a pipe connecting piece in an embodiment of the present application;

[0024] Figure 6 is an installation view of an automatic pre-filter and a filter in an embodiment of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, air compressor for engine; 2, air tank; 3, first air conveying pipe; 4, second air conveying pipe; 5, third air conveying pipe; 6, pressure regulating valve; 7, first branch pipe; 8, second branch pipe; 9, pipe connecting piece; 10, first connecting block; 11, second connecting block; 12, bolt; 13, three-way valve; 14, automatic pre-filter; 15, filter; 16, engine total air inlet pipe; 17, engine body; 18, support frame; 19, underframe; 20, connecting rod; 21, supporting leg; 22, engine support; 23, quick plug. DETAILED DESCRIPTION

[0027] The features and exemplary embodiments of each aspect of the present application will be described in detail below, in order to make the purpose, technical scheme and advantages of the present application more clear and apparent, the present application will be described in further detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.

[0028] To make the technical solution of this utility model clearer, this utility model describes the operation process of an existing automatic pre-filter. In conventional technology, a dedicated air supply device is used specifically in conjunction with an automatic pre-filter, and this dedicated air supply device only supplies air to the automatic pre-filter. This dedicated air supply device includes a dedicated air pump and a dedicated battery. The dedicated battery can power the dedicated air pump. The dedicated air pump is connected to the automatic ash removal device of the automatic pre-filter, and the automatic ash removal device of the automatic pre-filter is signal-connected to the dedicated air pump. When the automatic ash removal device detects that the particulate impurities stored in the automatic pre-filter have reached the target amount, or when the periodic start time of the automatic ash removal device is reached (whichever comes first), the automatic ash removal device switches from a closed state to an open state, and sends a start signal to the dedicated air pump. The dedicated air pump pumps air to the automatic ash removal device of the automatic pre-filter, thereby driving the particulate impurities in the automatic pre-filter to be discharged through the automatic ash removal device. After the dedicated air pump delivers air for a preset time period, the automatic ash removal device sends a shutdown signal to the dedicated air pump, causing it to stop operating. Simultaneously, the automatic ash removal device returns to its closed state. Therefore, the automatic pre-filter also has the functions of automatically detecting the amount of particulate impurities stored and controlling the start and stop of the dedicated air pump.

[0029] To make the technical solution of this utility model clearer, the air compressor for the engine is also described. For some large or heavy agricultural vehicles, such as grain harvesters, the engine block of these vehicles can usually be equipped with an air compressor for the engine. The air compressor for the engine is a dedicated air compressor installed in the engine block, usually used for auxiliary braking, etc. During the operation of the engine block, the engine block can provide driving force to the air compressor for the engine, which enables the air compressor to run continuously, and then the air compressor pumps air to the target device. That is to say, as long as the engine block is running, the air compressor for the engine will also be running, and the air compressor for the engine does not need to be powered by a dedicated battery or other dedicated power supply device.

[0030] Based on the characteristics of engine air compressors and automatic pre-filters, this utility model proposes a solution to the above-mentioned technical problems.

[0031] like Figures 1 to 3As shown, this utility model provides an air supply assembly for a pre-filter, which includes an engine air compressor 1, an air tank 2, a first air supply pipe 3, a second air supply pipe 4, and a third air supply pipe 5. The first air supply pipe 3 is configured to connect the engine main intake pipe 16 to the air intake port of the engine air compressor 1, enabling the engine main intake pipe 16 to supply air to the engine air compressor 1. The air outlet of the engine air compressor 1 is connected to the air tank 2 via the second air supply pipe 4. The engine air compressor 1 is mounted on an engine body 17 and can be driven by the engine body 17 to pump air to the air tank 2. The third air supply pipe 5 is configured to connect the air tank 2 to the automatic ash removal device of an automatic pre-filter 14. The air tank 2 is configured to store air and supply air to the automatic ash removal device of the automatic pre-filter 14.

[0032] Specifically, the main air intake pipe 16 is a conduit for supplying air to the engine body 17. The intake end of the first air supply pipe 3 is connected to the main air intake pipe 16, and the outlet end of the first air supply pipe 3 is connected to the intake port of the engine air compressor 1. The main air intake pipe 16 can supply air to the engine air compressor 1 through the first air supply pipe 3. The engine air compressor 1 can be mounted on the engine body 17, and the engine body 17 can drive the engine air compressor 1 to operate. During the operation of the engine body 17, the engine body 17 can drive the engine air compressor 1 to compress the input air, and the engine air compressor 1 can also pump the compressed air to the air storage tank 2 through the second air supply pipe 4, where the air storage tank 2 can store the air. The inlet end of the third air supply pipe 5 is connected to the air storage tank 2, and the outlet end of the third air supply pipe 5 can be connected to the automatic ash removal device of the automatic pre-filter 14. The air storage tank 2 can intermittently supply air to the automatic ash removal device of the automatic pre-filter 14 through the third air supply pipe 5, so as to allow the automatic pre-filter 14 to discharge particulate impurities inside the automatic pre-filter 14.

[0033] In this embodiment, the engine air compressor 1 is mounted on and driven by the engine body 17, enabling it to compress air from the engine's main intake pipe 16 and pump it into the air tank 2. The air tank 2 intermittently supplies air to the automatic ash removal device of the automatic pre-filter 14, allowing the automatic pre-filter 14 to remove particulate impurities from its interior. Since the engine air compressor 1 is driven by the engine body 17, which provides continuous power, it can be continuously driven without stopping under continuous operation conditions. This ensures that the air tank 2 always stores sufficient air for the automatic pre-filter 14, eliminating the need for frequent shutdowns for maintenance to guarantee energy supply. Therefore, using the pre-filter air supply assembly of this invention in conjunction with the automatic pre-filter 14 avoids the problem of frequent shutdowns for maintenance due to power supply issues, thereby improving harvesting efficiency. Especially during the harvest season, agricultural production efficiency will not be significantly reduced due to time-consuming losses.

[0034] It should be noted that the specific structural forms of the automatic pre-filter 14 and the filter 15 can be referred to the prior art and are not part of the improvement of this utility model. This utility model will not elaborate on them.

[0035] It should be further explained that the automatic ash removal device of the automatic pre-filter 14 is normally closed, and the engine air compressor 1 cannot supply air to the automatic ash removal device when it is in the normally closed state. Only when the automatic ash removal device detects that the particulate impurities stored in the automatic pre-filter 14 have reached the target amount, or when the periodic start time of the automatic ash removal device is reached (whichever comes first), will the automatic ash removal device switch from the closed state to the open state, and the air tank 2 can then supply compressed air to the automatic ash removal device, thereby driving the particulate impurities in the automatic pre-filter 14 to be discharged through the automatic ash removal device. And after the air tank 2 has supplied air for a preset time period, the automatic ash removal device returns to the closed state.

[0036] It should be noted that the assembly method between the air compressor 1 and the engine body 17, as well as the power transmission method, can refer to the existing technology and are not improvements of this utility model. This utility model will not elaborate on them.

[0037] It should be noted that the air storage tank 2 is used to store air during the operation of the grain combine harvester. When the grain combine harvester is stopped, the air storage tank 2 does not need to store air. Therefore, valves controlling the flow and shut-off do not need to be installed on the air inlet path of the air storage tank 2 (e.g., on the second air supply pipe 4 or at the air inlet of the air storage tank 2) and the air outlet path of the air storage tank 2 (e.g., on the third air supply pipe 5 or at the air outlet of the air storage tank 2). This allows the air in the air storage tank 2 (during the stop of the grain combine harvester) to leak out normally along the second air supply pipe 4 or the third air supply pipe 5.

[0038] However, in some other embodiments, a normally closed solenoid shut-off valve is installed on the third air supply pipe 5. An automatic ash removal device is signal-connected to this solenoid shut-off valve to control its opening and closing. When the automatic ash removal device detects that the particulate impurities stored in the automatic pre-filter 14 have reached a target amount, or when the periodic start-up time of the automatic ash removal device is reached (whichever comes first), the automatic ash removal device controls the solenoid shut-off valve to open, allowing the air tank 2 to supply compressed air. In some other embodiments, a one-way valve can be installed on the second air supply pipe 4, which only allows air to flow from the engine air compressor 1 to the air tank 2.

[0039] like Figures 1 to 3 As shown, in some embodiments of this utility model, the second gas supply pipe 4 is provided with a one-way gas supply pressure regulating valve 6, which is configured to allow the air in the second gas supply pipe 4 to flow to the gas storage tank 2 at a constant pressure.

[0040] Specifically, the pressure of the compressed air output from the engine air compressor 1 is affected by the power of the engine body 17. For example, when the power of the engine body 17 is high, the engine air compressor 1 can deliver air at a higher pressure to the air tank 2; when the power of the engine body 17 decreases, the air pressure delivered by the engine air compressor 1 may decrease accordingly. Therefore, there may be pressure fluctuations in the second air supply pipe 4, which is not conducive to the stable storage of air in the air tank 2. However, a one-way air supply pressure regulating valve 6 is installed on the second air supply pipe 4. When compressed air passes through the pressure regulating valve 6, the pressure regulating valve 6 can adjust the compressed air pressure, so that the compressed air flows to the air tank 2 at a constant pressure, thereby enabling the air tank 2 to stably store air.

[0041] In addition, the pressure regulating valve 6 is a one-way air supply valve, so the pressure regulating valve 6 only allows compressed air to be supplied from the engine air compressor 1 to the air tank 2, and does not allow air to flow in the opposite direction, which further ensures the safety of the air supply assembly for the pre-filter.

[0042] It should be noted that the pressure regulating valve 6 can be any structural form in the art that can meet the requirements of this utility model, and this utility model does not impose any restrictions.

[0043] like Figures 1 to 3 As shown, in some embodiments of this utility model, the inner diameter of the first gas supply pipe 3 is larger than the inner diameter of the second gas supply pipe 4 and the inner diameter of the third gas supply pipe 5.

[0044] Specifically, the air flowing in the first air supply pipe 3 is uncompressed air. To increase the air delivery volume, the inner diameter of the first air supply pipe 3 is relatively large. The air flowing in the second air supply pipe 4 and the third air supply pipe 5 is compressed air. To enable the compressed air to flow more quickly and to reduce material costs, the inner diameters of the second air supply pipe 4 and the third air supply pipe 5 are relatively small.

[0045] like Figures 1 to 3 As shown, in some embodiments of this utility model, the air supply assembly for the pre-filter also includes a first branch pipe 7 and a second branch pipe 8. The air inlet end of the first branch pipe 7 and the air inlet end of the second branch pipe 8 are connected to the air outlet end of the third air supply pipe 5 through a three-way valve 13. The air outlet end of the first branch pipe 7 can be connected to the automatic ash removal device of the automatic pre-filter 14. The air outlet end of the second branch pipe 8 is equipped with a quick-connect fitting 23 with a shut-off valve. The quick-connect fitting 23 is used to connect pneumatic tools.

[0046] Specifically, based on the operation of the engine body 17, the air tank 2 can always store a certain amount of compressed air. On the one hand, the air tank 2 can supply compressed air to the automatic dust removal device of the automatic pre-filter 14 through the third air supply pipe 5 and the first branch pipe 7 in sequence. On the other hand, the air tank 2 can also provide compressed air for pneumatic tools. For example, when a dust removal air gun is installed on the quick-connect connector 23, the dust removal air gun can use compressed air to clean dust on various devices (such as the outer surface of the automatic pre-filter 14 or the radiator core). As another example, when an air pump is installed on the quick-connect connector 23, it can be used to inflate tires.

[0047] It should be noted that the quick-connect connector 23 can be any structural form in the art that can meet the usage requirements of this utility model, and this utility model does not impose any restrictions.

[0048] like Figure 4 As shown, in some embodiments of this utility model, the second air supply pipe 4 and the third air supply pipe 5 are connected by a pipe fitting connector 9, which is used to connect to the engine bracket 22.

[0049] Specifically, the engine body 17 is mounted on the engine bracket 22, and the pipe connector 9 can be fixedly connected to the engine bracket 22. When the second air pipe 4 and the third air pipe 5 are connected to the pipe connector 9, the second air pipe 4 and the third air pipe 5 can be fixed to the engine bracket 22 to prevent the second air pipe 4 and the third air pipe 5 from swinging violently during the movement of the grain combine harvester. Preferably, there are multiple pipe connectors 9, and these pipe connectors 9 are spaced apart along the extension direction of the second air pipe 4 and the third air pipe 5.

[0050] like Figure 4 and Figure 5 As shown, in some embodiments of this utility model, the pipe connector 9 includes a first connecting block 10 and a second connecting block 11. The second air supply pipe 4 and the third air supply pipe 5 are fixed by the first connecting block 10 and the second connecting block 11. The first connecting block 10 and the second connecting block 11 are connected by bolts 12. The first connecting block 10 is used to connect to the engine bracket 22.

[0051] Specifically, the bottom of the first connecting block 10 has two spaced-apart first grooves, and the top of the second connecting block 11 has two spaced-apart second grooves. The two first grooves and the two second grooves correspond one-to-one, and the first grooves and their corresponding second grooves mate to form mounting holes. The second air supply pipe 4 and the third air supply pipe 5 pass through the two mounting holes respectively, thereby fixing the second air supply pipe 4 and the third air supply pipe 5 between the first connecting block 10 and the second connecting block 11. The first connecting block 10 and the second connecting block 11 are connected by bolts 12, which facilitates the assembly and disassembly of the second air supply pipe 4 and the third air supply pipe 5.

[0052] Of course, the pipe fitting connector 9 can also be any other structural form that meets the requirements of this utility model, and this utility model does not impose any limitations. For example, the pipe fitting connector 9 can be a clamp, cable tie, or buckle, etc.

[0053] In some embodiments, the air tank 2 is disposed below the engine air compressor 1. Preferably, the air tank 2 can be fixedly connected to the side of the engine bracket 22.

[0054] It should be noted that the inlet pressure of the gas storage tank 2 is slightly greater than the outlet pressure of the gas storage tank 2, that is, the gas pressure in the second gas supply pipe 4 and the gas pressure in the third gas supply pipe 5, so that the gas storage tank 2 can stably inlet and outlet gas.

[0055] It should be noted that the automatic ash discharge device of the automatic pre-filter 14 can be opened periodically, so the air tank 2 can frequently supply air to the automatic ash discharge device of the automatic pre-filter 14, ensuring that the air pressure in the air tank 2 is always maintained within a safe range. However, in some other embodiments, a pressure relief valve can be installed on the air tank 2. When the pressure in the air tank 2 exceeds the preset pressure, the pressure relief valve opens and releases a certain amount of air to keep the air pressure in the air tank 2 within a safe range.

[0056] This utility model also provides an air filtration system, which includes an automatic pre-filter 14, a filter 15, an engine main intake pipe 16, and an air supply assembly for the pre-filter described in the above embodiment. The outlet of the automatic pre-filter 14 is connected to the inlet of the filter 15, and the engine main intake pipe 16 is used to connect the outlet of the filter 15 to the inlet of the engine body 17.

[0057] Specifically, such as Figures 1 to 3 As shown, the outlet of the automatic pre-filter 14 is connected to the inlet of the filter 15, the outlet of the filter 15 is connected to the inlet of the engine main intake pipe 16, and the outlet of the engine main intake pipe 16 is connected to the inlet of the engine body 17. After being filtered by the automatic pre-filter 14 and the filter 15, the outside air can flow to the engine body 17 through the engine main intake pipe 16. At the same time, a portion of the air flows to the engine air compressor 1 through the first air supply pipe 3, and the engine air compressor 1 can pump this portion of air to the air tank 2.

[0058] In this embodiment, the air filtration system uses the pre-filter air supply assembly of the above embodiment, so it can also achieve the above-mentioned technical effects.

[0059] In some embodiments of this utility model, a first pipe joint is provided on the engine main intake pipe 16, and the intake end of the first air supply pipe 3 is fixedly sleeved on the first pipe joint; a second pipe joint is provided at the air inlet of the engine air compressor 1, and the outlet end of the first air supply pipe 3 is fixedly sleeved on the second pipe joint. The first air supply pipe 3 is installed in the above manner, which is simple and secure.

[0060] Preferably, clamps can be provided at the air inlet and air outlet of the first air supply pipe 3 to make the connection more secure and reliable.

[0061] This utility model also provides a grain combine harvester, which includes an engine body 17 and an air filtration system as described in the above embodiment. The air outlet of the filter 15 is connected to the air inlet of the engine body 17 through the engine main air intake pipe 16. An engine air compressor 1 is mounted on the engine body 17, and the engine body 17 can drive the engine air compressor 1 to operate.

[0062] Specifically, such as Figures 1 to 3 As shown, the outlet of the automatic pre-filter 14 is connected to the inlet of the filter 15, the outlet of the filter 15 is connected to the inlet of the engine main intake pipe 16, and the outlet of the engine main intake pipe 16 is connected to the inlet of the engine body 17. After being filtered sequentially by the automatic pre-filter 14 and the filter 15, external air flows through the engine main intake pipe 16 to the engine body 17. Simultaneously, a portion of the air flows through the first air supply pipe 3 to the engine air compressor 1. The engine air compressor 1 is mounted on the engine body 17, and the engine body 17 can drive the engine air compressor 1 to operate. The engine air compressor 1 can pump this portion of air to the air tank 2 through the second air supply pipe 4. The air tank 2 can store air, and it can also intermittently supply air to the automatic pre-filter 14 through the third air supply pipe 5.

[0063] In this embodiment, the grain combine harvester uses the air filtration system described in the above embodiment, thus achieving the aforementioned technical effects.

[0064] like Figures 1 to 3 As shown, in some embodiments of this utility model, the grain combine harvester further includes a support frame 18, and a filter 15 and an automatic pre-filter 14 are mounted on the support frame 18. The support frame 18 can support and fix the filter 15 and the automatic pre-filter 14 to prevent the filter 15 and the automatic pre-filter 14 from shaking violently.

[0065] like Figure 6 As shown, in some embodiments of this utility model, the support frame 18 includes a base frame 19 and a connecting rod 20. The filter 15 is fixedly installed on the top of the base frame 19. The bottom of the base frame 19 is provided with a plurality of spaced-apart support legs 21. The connecting rod 20 is fixedly connected to the top of the base frame 19, and the top end of the connecting rod 20 is fixedly connected to the side of the automatic pre-filter 14. The base frame 19 can support and fix the filter 15, and the connecting rod 20 can fix the automatic pre-filter 14.

[0066] Of course, the support frame 18 can also be other structural forms that can meet the needs of this utility model, and this utility model does not impose any restrictions.

[0067] In some embodiments, the first branch pipe 7 may be fixedly connected to the support frame 18, for example, it may be fixedly connected to the connecting rod 20, to prevent the first branch pipe 7 from swinging violently.

[0068] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above are only preferred embodiments of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of this utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A gas delivery assembly for a prefilter, characterized by, The air compressor (1) for engine, the air tank (2), the first air pipe (3), the second air pipe (4) and the third air pipe (5) are included. The first air pipe (3) is arranged to be able to communicate the engine total air pipe (16) with the air inlet of the air compressor (1) for engine, so that the engine total air pipe (16) can deliver air to the air compressor (1) for engine. The air outlet of the air compressor (1) for engine is communicated with the air tank (2) through the second air pipe (4). The air compressor (1) for engine is arranged to be assembled on the engine body (17) and can be driven by the engine body (17) to operate, so that the air compressor (1) for engine can pump air to the air tank (2). The third air pipe (5) is arranged to be able to communicate the air tank (2) with the automatic ash removal device of the automatic pre-filter (14), and the air tank (2) is arranged to be able to store air and deliver air to the automatic ash removal device of the automatic pre-filter (14).

2. The gas delivery assembly for a prefilter of claim 1, wherein, The second air pipe (4) is provided with a one-way air delivery pressure regulating valve (6), and the pressure regulating valve (6) is arranged to be able to make the air in the second air pipe (4) flow to the air tank (2) at a constant air pressure. And / or, the inner diameter of the first air pipe (3) is greater than the inner diameters of the second air pipe (4) and the third air pipe (5).

3. The gas delivery assembly for a prefilter of claim 1, wherein, The pre-filter air supply assembly further includes a first branch pipe (7) and a second branch pipe (8), the air inlet end of the first branch pipe (7) and the air inlet end of the second branch pipe (8) are connected to the air outlet end of the third air pipe (5) through a three-way valve (13), the air outlet end of the first branch pipe (7) can be communicated with the automatic ash removal device of the automatic pre-filter (14), and the air outlet end of the second branch pipe (8) is provided with a quick connector (23) with a stop valve, and the quick connector (23) is used to connect a pneumatic tool.

4. The gas delivery assembly for a prefilter of claim 1, wherein, The second air pipe (4) and the third air pipe (5) are connected through a pipe fitting connector (9), and the pipe fitting connector (9) is used to be connected to an engine support (22).

5. The gas delivery assembly for a prefilter of claim 4, wherein, The pipe fitting connector (9) includes a first connecting block (10) and a second connecting block (11), the second air pipe (4) and the third air pipe (5) are fixed through the first connecting block (10) and the second connecting block (11), the first connecting block (10) and the second connecting block (11) are connected through bolts (12), and the first connecting block (10) is used to be connected to the engine support (22).

6. An air filtration system characterized by, The automatic pre-filter (14), the filter (15), the engine total air pipe (16) and the pre-filter air supply assembly of any one of claims 1-5 are included. The air outlet of the automatic pre-filter (14) is communicated with the air inlet of the filter (15), and the engine total air pipe (16) is used to communicate the air outlet of the filter (15) with the air inlet of the engine body (17).

7. The air filtration system of claim 6, wherein, The engine total air inlet pipe (16) is provided with a first pipe joint, and the air inlet end of the first air conveying pipe (3) is fixedly sleeved on the first pipe joint; The engine air compressor (1) is provided with a second pipe joint at the air inlet, and the air outlet end of the first air conveying pipe (3) is fixedly sleeved on the second pipe joint.

8. A grain combine, characterized in that The engine air compressor (1) is provided with a second pipe joint at the air inlet, and the air outlet end of the first air conveying pipe (3) is fixedly sleeved on the second pipe joint.

9. The combine harvester of claim 8, wherein, The engine air compressor (1) is provided with a second pipe joint at the air inlet, and the air outlet end of the first air conveying pipe (3) is fixedly sleeved on the second pipe joint.

10. The combine harvester of claim 9, wherein, The grain combine harvester further comprises a support frame (18), and the filter (15) and the automatic pre-filter (14) are installed on the support frame (18). The support frame (18) comprises a base frame (19) and a connecting rod (20), the filter (15) is fixedly installed on the top of the base frame (19), the bottom of the base frame (19) is provided with a plurality of spaced supporting legs (21), the connecting rod (20) is fixedly connected to the top of the base frame (19), and the top end of the connecting rod (20) is fixedly connected with the side of the automatic pre-filter (14).

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