Pre-filter and agricultural machine
By introducing a highly transparent, large-capacity dust chamber and a knob-type dust chamber cover into the pre-filter of agricultural machinery, the problem of difficult observation and cleaning of dust accumulation in the pre-filter has been solved, enabling convenient dust collection and cleaning, and improving intake air quality and engine performance.
Patent Information
- Application Number
- CN202520383843.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-03-06
AI Technical Summary
The pre-filters of existing agricultural machinery frequently accumulate dust in the operating environment, making it difficult to observe the amount of dust and clean it, which affects the intake air quality and engine emission system.
Design a pre-filter that includes a highly transparent, large-capacity dust chamber and a knob-type dust chamber cover. Dust is naturally collected into the transparent dust chamber through the dust discharge port, making it easy to observe and clean, and reducing the difficulty of cleaning.
It significantly extends maintenance cycles, reduces labor costs, improves intake air quality, extends engine life, and provides accurate intake dust data support.
Smart Images
Figure CN223578077U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the prefilter field, concretely relates to a prefilter and agricultural machinery. BACKGROUND
[0002] The existing rice machine or other agricultural machinery has more dust and chaff when working, the working environment is relatively bad, the air prefilter is used for initially filtering the air entering the subsequent filter, and the air prefilter not only guarantees the air inlet quality, but also cooperates with the exhaust system of the engine to reduce pollution emission.
[0003] Generally, the existing prefilter is usually installed at a position with high height from the ground in order to prevent dust effect, and it is difficult to observe whether the dust is full. When cleaning, the filter box is carefully taken out, and a special cleaning device is used. Improper operation can also damage the filter box, and the cleaning difficulty is great and the efficiency is low. UTILITY MODEL CONTENTS
[0004] The technical problem to be solved by the utility model is how to facilitate observation of the dust collection amount of the prefilter and reduce the cleaning difficulty of the prefilter.
[0005] The technical scheme for solving the above technical problem of the utility model is as follows: a prefilter, comprising a prefilter main body, a high-transparency large-capacity dust cavity and a rotary knob type dust cavity cover, the lower part of the prefilter main body is provided with a dust discharge port, the dust discharge port is connected and communicated with the upper end of the high-transparency large-capacity dust cavity, the lower end of the high-transparency large-capacity dust cavity is detachably connected with the rotary knob type dust cavity cover, and the high-transparency large-capacity dust cavity is made of a transparent material.
[0006] The utility model has the beneficial effects that: dust and impurities can be automatically collected into the high-transparency large-capacity dust cavity from the dust discharge port of the prefilter main body by means of natural methods such as vehicle vibration and self-gravity, and the high-transparency large-capacity dust cavity is transparent and visible, so that the dust accumulation condition can be observed conveniently. When cleaning is needed, the dust in the high-transparency large-capacity dust cavity can be discharged by detaching the rotary knob type dust cavity cover, so that the cleaning difficulty is greatly reduced and the cleaning time is shortened. The dust discharge port of the prefilter is lowered in height through the high-transparency large-capacity dust cavity and is provided with the rotary knob type dust cavity cover, so that the cleaning work is more convenient.
[0007] The prefilter of the scheme can significantly prolong the maintenance period, reduce the time required for maintenance, reduce the work burden of the driver, reduce the disassembly and assembly frequency of the prefilter, prolong the service life of the prefilter and the engine, reduce the labor cost, and improve the user benefit.
[0008] In addition, the air inlet quality can be improved, and the air inlet dust intake value of the engine in a specific environment can be accurately obtained, so as to provide accurate data support for the collection work of the engine air inlet system.
[0009] On the basis of the above technical scheme, the utility model further can make improvement as follows.
[0010] Further, the pre-filter further comprises a dust transition pipe, two ends of the dust transition pipe are fixedly connected with the dust discharging port and the upper end of the high-transparency large-capacity dust cavity and are in communication.
[0011] Further, the pre-filter further comprises a fixing clamp, the end of the dust transition pipe is fixedly connected with the dust discharging port through the fixing clamp.
[0012] The beneficial effect of the above further scheme is that the dust transition pipe is connected with the dust discharging port through the fixing clamp, which is convenient for disassembly and maintenance.
[0013] Further, the pre-filter main body is provided with a plurality of dust discharging ports at the lower part, the dust transition pipe comprises a plurality of transition branch pipes and a transition main pipe, the upper ends of the plurality of transition branch pipes are connected with the plurality of dust discharging ports one by one and are in communication, the lower ends of the plurality of transition branch pipes are connected with the upper end of the transition main pipe, and the lower end of the transition main pipe is fixedly connected with the upper end of the high-transparency large-capacity dust cavity and is in communication.
[0014] The beneficial effect of the above further scheme is that the dust of the plurality of dust discharging ports is collected in the high-transparency large-capacity dust cavity through the dust transition pipe, the structure is compact, and the dust collecting efficiency is high.
[0015] Further, the pre-filter further comprises a safety chain, two ends of the safety chain are fixedly connected with the high-transparency large-capacity dust cavity and the rotary knob type dust cavity cover respectively, and the side wall of the high-transparency large-capacity dust cavity is provided with a scale line.
[0016] The beneficial effect of the above further scheme is that the safety chain is arranged, and the rotary knob type dust cavity cover can be avoided from being lost.
[0017] Further, the pre-filter main body comprises a shell, an air inlet net, an air outlet pipe, a cyclone assembly, an inner pipe support plate and an outer pipe support plate, the inner pipe support plate and the outer pipe support plate are arranged in the shell in an upper and lower spaced manner and divide the shell into a back gas area, an air inlet area and a dust discharging area arranged from top to bottom, the outer walls of the inner pipe support plate and the outer pipe support plate are fixedly connected with the inner wall of the shell, the side wall of the shell is provided with the air inlet net in communication with the air inlet area, the cyclone assembly is installed on the inner pipe support plate and the outer pipe support plate, the cyclone assembly has a cyclone air inlet, a cyclone dust discharging port and a cyclone air outlet located in the air inlet area, the dust discharging area and the back gas area respectively, the upper end of the air outlet pipe is located in the air inlet area, the lower end of the air outlet pipe extends to outside of the shell, and the bottom of the shell is provided with the dust discharging port.
[0018] The beneficial effect of the further scheme is that the air mixed with dust enters the shell from the air inlet net, enters the cyclone air inlet of the cyclone assembly, is separated by the cyclone assembly, dust is discharged from the cyclone dust outlet to the dust outlet, and the gas enters the air outlet pipe after passing through the cyclone gas outlet and is discharged.
[0019] Further, the pre-filter body further comprises a spacer sleeve, the spacer sleeve is sleeved in the shell and located inside the air inlet net, the outer tube support plate is fixedly connected with the inner wall of the spacer sleeve, the upper end of the spacer sleeve is spaced apart from the bottom surface of the inner tube support plate, the cyclone assembly comprises a cyclone vane, a cyclone outer tube and a cyclone inner tube, the cyclone outer tube is sleeved outside the lower part of the cyclone inner tube and fixedly connected with the outer tube support plate, the upper end of the cyclone outer tube is spaced apart from the bottom surface of the inner tube support plate, the lower end of the cyclone outer tube extends to the dust discharging area, the cyclone vane is fixed between the cyclone outer tube and the cyclone inner tube, and the upper end of the cyclone inner tube extends to the air returning area and is fixedly connected with the inner tube support plate.
[0020] The beneficial effect of the further scheme is that the dust-containing air enters the space between the shell and the spacer sleeve from the air inlet net. Then, the air enters the air inlet area from the upper end of the spacer sleeve, flows between the cyclone outer tube and the cyclone inner tube at a certain speed, and rotates at high speed under the action of the cyclone vane. The strong rotation of the airflow generates centrifugal force, which throws dust particles with a density greater than that of the gas to the inner wall of the cyclone outer tube. After the dust particles contact the cyclone outer tube, they fall along the wall surface by the momentum of the inlet velocity and their own gravity, are discharged from the lower end of the cyclone outer tube to the dust discharging area, and enter the high-transparency large-capacity dust cavity through the dust outlet. After being cleaned, the gas enters the cyclone inner tube from the lower end of the cyclone inner tube, flows upward to the air returning area, and is discharged after entering the air outlet pipe.
[0021] Further, the cyclone assembly is provided with a plurality of.
[0022] The beneficial effect of the further scheme is that multiple cyclone assemblies are provided to simultaneously remove dust, and the dust removal efficiency is high.
[0023] Further, the pre-filter body further comprises a rainproof cap, and the rainproof cap is fixedly connected with the top of the shell.
[0024] The beneficial effect of the further scheme is that the rainproof cap covers the top of the pre-filter body, reducing the entry of rainwater into the pre-filter body.
[0025] The utility model further provides an agricultural machine, including cab and pre-filter, high-transparency large-capacity dust cavity's lower end is located in the lower part of the side of the cab.
[0026] The beneficial effect is that the lower end of the high-transparency large-capacity dust cavity is located at the driver's boarding position or a position convenient for observation, so that the driver can observe in real time and maintain in time. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 It is a front view of the pre-filter, wherein the pre-filter body is a partial cross-sectional view.
[0028] Figure 2 It is Figure 1 It is a partial enlarged view of A of the pre-filter.
[0029] In the drawings, the components represented by each reference numeral are listed as follows:
[0030] 1, housing; 2, air inlet net; 3, fixed clamp; 4, air outlet pipe; 5, dust transition pipe; 6, scale; 7, high-transparency large-capacity dust cavity; 8, knob-type dust cavity cover; 9, rainproof cap; 10, cyclone blade; 11, cyclone outer pipe; 12, cyclone inner pipe; 13, spacer sleeve; 14, inner pipe support plate; 15, outer pipe support plate. DETAILED DESCRIPTION
[0031] The principles and characteristics of the present application are described below in conjunction with the drawings, and the examples are only used to explain the present application and are not intended to limit the scope of the present application.
[0032] Example 1
[0033] As Figures 1-2 shown, the present embodiment provides a pre-filter, which includes a pre-filter body, a high-transparency large-capacity dust cavity 7, and a knob-type dust cavity cover 8. The pre-filter body has a dust discharge port at the lower part. The dust discharge port is connected and communicated with the upper end of the high-transparency large-capacity dust cavity 7. The lower end of the high-transparency large-capacity dust cavity 7 is detachably connected with the knob-type dust cavity cover 8. The high-transparency large-capacity dust cavity 7 is made of a transparent material.
[0034] Dust and impurities can be automatically collected into the high-transparency large-capacity dust cavity 7 from the dust discharge port of the pre-filter body by natural methods such as vehicle vibration and self-gravity, and the high-transparency large-capacity dust cavity 7 is transparent and visible to facilitate observation of the dust accumulation condition. When cleaning is needed, the knob-type dust cavity cover 8 can be removed to discharge the dust in the high-transparency large-capacity dust cavity 7, greatly reducing the cleaning difficulty and shortening the cleaning time. The pre-filter dust discharge port is lowered in height by the high-transparency large-capacity dust cavity 7 and is equipped with the knob-type dust cavity cover 8, making the cleaning work more convenient.
[0035] The pre-filter of the present scheme can significantly prolong the maintenance period, reduce the time required for maintenance, reduce the work burden of the driver, and at the same time reduce the frequency of disassembly and assembly of the pre-filter, prolong the service life of the pre-filter and the engine, reduce the labor cost, and improve the user's benefits.
[0036] In addition, it can also improve the air intake quality and accurately obtain the intake dust intake value of the engine in a specific environment, providing accurate data support for the collection work of the engine air intake system.
[0037] On the basis of the above technical solutions, the pre-filter further comprises a dust transition pipe 5, two ends of the dust transition pipe 5 are fixedly connected with and communicated with the dust discharging port and the upper end of the high-transparency large-capacity dust cavity 7 respectively.
[0038] In one specific example, the dust transition pipe 5 is a soft transparent steel wire framework bellows.
[0039] On the basis of the above technical solutions, the pre-filter further comprises a fixed clamp 3, the end of the dust transition pipe 5 is fixedly connected with the dust discharging port through the fixed clamp 3.
[0040] The dust transition pipe 5 is connected with the dust discharging port through the fixed clamp 3, which facilitates disassembly, assembly and maintenance.
[0041] On the basis of the above technical solutions, the pre-filter main body has a plurality of dust discharging ports, the dust transition pipe 5 comprises a plurality of transition branch pipes and a transition main pipe, the upper ends of the plurality of transition branch pipes are connected with and communicated with the plurality of dust discharging ports one by one, the lower ends of the plurality of transition branch pipes are connected with the upper end of the transition main pipe, and the lower end of the transition main pipe is fixedly connected with and communicated with the upper end of the high-transparency large-capacity dust cavity 7.
[0042] The dust of the plurality of dust discharging ports is collected into one high-transparency large-capacity dust cavity 7 through the dust transition pipe 5, so that the structure is compact and the dust collecting efficiency is high.
[0043] As an alternative to the above scheme, a plurality of high-transparency large-capacity dust cavities 7 can be provided, and the plurality of dust discharging ports are communicated with the plurality of high-transparency large-capacity dust cavities 7 one by one, but since a plurality of high-transparency large-capacity dust cavities 7 need to be provided, the cleaning efficiency is low, so this scheme is not the best scheme of the embodiment.
[0044] As another alternative to the above scheme, a plurality of dust transition pipes 5 are provided, the upper ends of the plurality of dust transition pipes 5 are communicated with the plurality of dust discharging ports one by one, and the lower ends of the plurality of dust transition pipes 5 are communicated with the upper end of the same high-transparency large-capacity dust cavity 7.
[0045] On the basis of any of the above schemes, the pre-filter further comprises a safety chain, two ends of the safety chain are fixedly connected with the high-transparency large-capacity dust cavity 7 and the knob-type dust cavity cover 8 respectively, and the side wall of the high-transparency large-capacity dust cavity 7 is provided with a scale line 6.
[0046] The safety chain is provided, so that the knob-type dust cavity cover 8 can be prevented from being lost.
[0047] On the basis of the above technical scheme, the pre-filter main body comprises a shell 1, an air inlet net 2, an air outlet pipe 4, a cyclone assembly, an inner pipe support plate 14 and an outer pipe support plate 15, the inner pipe support plate 14 and the outer pipe support plate 15 are arranged in the shell 1 in an upper and lower spaced manner and divide the shell 1 into a return air area, an air inlet area and a dust discharge area arranged from top to bottom, the outer walls of the inner pipe support plate 14 and the outer pipe support plate 15 are fixedly connected with the inner wall of the shell 1, the side wall of the shell 1 is provided with the air inlet net 2 in communication with the air inlet area, the cyclone assembly is installed on the inner pipe support plate 14 and the outer pipe support plate 15, the cyclone assembly has a cyclone air inlet, a cyclone dust discharge port and a cyclone air outlet located in the air inlet area, the dust discharge area and the return air area respectively, the upper end of the air outlet pipe 4 is located in the air inlet area, the lower end of the air outlet pipe 4 extends out of the shell 1, and the bottom of the shell 1 is provided with the dust discharge port.
[0048] The air mixed with dust enters the shell 1 from the air inlet net 2 and enters the cyclone air inlet of the cyclone assembly, and the dust is separated from the gas by the cyclone assembly and discharged from the cyclone dust discharge port to the dust discharge port, and the gas enters the air outlet pipe 4 through the cyclone air outlet and is discharged.
[0049] Specifically, the return air area, the air inlet area and the dust discharge area are not communicated with each other.
[0050] On the basis of the above technical scheme, the pre-filter main body further comprises a spacer sleeve 13, the spacer sleeve 13 is sleeved in the shell 1 and located on the inner side of the air inlet net 2, the outer pipe support plate 15 is fixedly connected with the inner wall of the spacer sleeve 13, the upper end of the spacer sleeve 13 is arranged in a spaced manner with the bottom surface of the inner pipe support plate 14, the cyclone assembly comprises a cyclone vane 10, a cyclone outer pipe 11 and a cyclone inner pipe 12, the cyclone outer pipe 11 is sleeved on the outer side of the lower part of the cyclone inner pipe 12 and fixedly connected with the outer pipe support plate 15, the upper end of the cyclone outer pipe 11 is arranged in a spaced manner with the bottom surface of the inner pipe support plate 14, the lower end of the cyclone outer pipe 11 extends to the dust discharge area, the cyclone vane 10 is fixed between the cyclone outer pipe 11 and the cyclone inner pipe 12, and the upper end of the cyclone inner pipe 12 extends to the return air area and is fixedly connected with the inner pipe support plate 14.
[0051] Dusty air enters the space between the shell 1 and the spacer sleeve 13 from the air inlet net 2. Then it enters the air inlet area from the upper end of the spacer sleeve 13, flows between the cyclone outer tube 11 and the cyclone inner tube 12 at a certain speed, and rotates at high speed under the action of the cyclone vane 10. The airflow rotates strongly to generate centrifugal force, which throws dust particles with a density greater than the gas to the inner wall of the cyclone outer tube 11. After the dust particles contact the cyclone outer tube 11, they fall along the wall by the momentum of the inlet velocity and their own gravity, and are discharged from the lower end of the cyclone outer tube 11 to the dust discharge area, and then enter the high-transparency large-capacity dust chamber 7 through the dust outlet.
[0052] Specifically, as shown in Figure 2 the upper end of the cyclone outer tube 11 and the bottom surface of the inner tube support plate 14 form the cyclone air inlet; the lower end of the cyclone outer tube 11 has the cyclone dust discharge port; and the upper end of the cyclone inner tube 12 has the cyclone gas discharge port.
[0053] Specifically, the cyclone outer tube 11 includes a circular channel section and a circular truncated cone section in communication with each other. From top to bottom, as the diameter of the circular truncated cone section gradually decreases, the wind speed of the cyclone gradually increases, and the dust removal effect is better.
[0054] Among them, the cyclone vane 10 is provided with a plurality of cyclone vanes 10 along the circumference of the cyclone inner tube 12. In one specific example, the number of cyclone vanes 10 of each cyclone assembly is 4 to 10. Optionally, the cyclone vane 10 is in the form of a flat plate or a curved plate. The cyclone vane 10 is provided with a flow guide groove arranged along the inclined direction of the cyclone vane 10 from top to bottom, i.e. arranged along the rotation direction of the airflow, to guide the airflow to rotate and make impurities be thrown to the tube wall under the action of centrifugal force.
[0055] On the basis of the above technical scheme, the cyclone assembly is provided with a plurality of
[0056] Multiple cyclone assemblies are arranged to simultaneously remove dust, and the dust removal efficiency is high.
[0057] In one specific example, the plurality of cyclone assemblies are arranged in an array around the air outlet tube 4.
[0058] On the basis of the above technical scheme, the pre-filter body further includes a rainproof cap 9, and the rainproof cap 9 is fixedly connected with the top of the shell 1.
[0059] The rainproof cap 9 shields the top of the pre-filter body to reduce the entry of rainwater into the pre-filter body.
[0060] Embodiment Two
[0061] The embodiment also provides an agricultural machine including a cab and the pre-filter of embodiment one, and the lower end of the high-transparency large-capacity dust chamber 7 is located at the lower part of the side of the cab.
[0062] The lower end of the high-transparency large-capacity ash cavity 7 is located at a driver boarding position or a position convenient for observation, so that the driver can observe in real time and maintain in time.
[0063] Specifically, the air is discharged from the air outlet pipe 4 of the prefilter, passes through the subsequent air filter, and then enters the engine.
[0064] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0065] In the description of the utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.
[0066] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0067] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.
[0068] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;It can be directly connected, or indirectly connected through the intermediate medium, it can be two elements inside the communication. For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.
[0069] The above only is the preferred embodiment of the utility model, and does not use to limit the utility model, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.
Claims
1. A prefilter, characterized in that, The utility model relates to a prefiltering body, a high-transparency large-capacity dust chamber (7) and a knob-type dust chamber cover (8), wherein the lower part of the prefiltering body is provided with a dust outlet connected with the upper end of the high-transparency large-capacity dust chamber (7), the lower end of the high-transparency large-capacity dust chamber (7) is detachably connected with the knob-type dust chamber cover (8), and the high-transparency large-capacity dust chamber (7) is made of transparent material.
2. A prefilter according to claim 1, characterized in that The utility model also comprises a dust transition pipe (5) fixedly connected with the dust outlet and the upper end of the high-transparency large-capacity dust chamber (7).
3. A prefilter according to claim 2, wherein The utility model also comprises a fixing clamp (3) for fixedly connecting the end of the dust transition pipe (5) with the dust outlet.
4. A prefilter according to claim 2, wherein The lower part of the prefiltering body is provided with a plurality of dust outlets, the dust transition pipe (5) comprises a plurality of transition branch pipes and a transition main pipe, the upper ends of the plurality of transition branch pipes are connected with the plurality of dust outlets one by one, the lower ends of the plurality of transition branch pipes are connected with the upper end of the transition main pipe, and the lower end of the transition main pipe is fixedly connected with the upper end of the high-transparency large-capacity dust chamber (7).
5. A prefilter according to claim 1, wherein The utility model also comprises a safety chain fixedly connected with the high-transparency large-capacity dust chamber (7) and the knob-type dust chamber cover (8), and the sidewall of the high-transparency large-capacity dust chamber (7) is provided with a scale line (6).
6. A prefilter according to claim 1, wherein The prefiltering body comprises a shell (1), an air inlet net (2), an air outlet pipe (4), a cyclone assembly, an inner pipe support plate (14) and an outer pipe support plate (15), the inner pipe support plate (14) and the outer pipe support plate (15) are arranged in the shell (1) in a spaced-apart manner from top to bottom, and divide the shell (1) into a return air area, an air inlet area and a dust discharge area arranged from top to bottom, the outer walls of the inner pipe support plate (14) and the outer pipe support plate (15) are fixedly connected with the inner wall of the shell (1), the sidewall of the shell (1) is provided with the air inlet net (2) in communication with the air inlet area, the cyclone assembly is installed on the inner pipe support plate (14) and the outer pipe support plate (15), the cyclone assembly has a cyclone air inlet, a cyclone dust discharge port and a cyclone air outlet located in the air inlet area, the dust discharge area and the return air area respectively, the upper end of the air outlet pipe (4) is located in the air inlet area, the lower end of the air outlet pipe (4) extends out of the shell (1), and the bottom of the shell (1) is provided with the dust outlet.
7. A prefilter according to claim 6, characterized in that The pre-filter body further comprises a spacer sleeve (13) which is sleeved in the shell (1) and located inside the air inlet net (2), the outer tube support plate (15) is fixedly connected with the inner wall of the spacer sleeve (13), the upper end of the spacer sleeve (13) is spaced apart from the bottom surface of the inner tube support plate (14), the cyclone assembly comprises a cyclone vane (10), a cyclone outer tube (11) and a cyclone inner tube (12), the cyclone outer tube (11) is sleeved outside the lower part of the cyclone inner tube (12) and is fixedly connected with the outer tube support plate (15), the upper end of the cyclone outer tube (11) is spaced apart from the bottom surface of the inner tube support plate (14), the lower end of the cyclone outer tube (11) extends to the dust discharging area, the cyclone vane (10) is fixed between the cyclone outer tube (11) and the cyclone inner tube (12), and the upper end of the cyclone inner tube (12) extends to the air return area and is fixedly connected with the inner tube support plate (14).
8. A prefilter according to claim 6, wherein The cyclone assembly is provided with a plurality of.
9. A prefilter according to claim 6, wherein The pre-filter body further comprises a rainproof cap (9) which is fixedly connected with the top of the shell (1).
10. An agricultural machine characterized by comprising: The pre-filter comprises a cab and a pre-filter according to any one of claims 1-9, and the lower end of the high-transparency large-capacity dust chamber (7) is located at the lower part of the side of the cab.