Air coarse strainer and engine system

Abstract

The utility model relates to the technical field of air filtration, and discloses an air coarse strainer and an engine system, when the air coarse strainer is cleaned, an upper cover is detached from an upper plate, and then a protective net assembly is integrally moved away relative to the upper plate, so that a rotational flow pipe in a main cavity can be exposed, and the interior of the air coarse strainer can be cleaned. During working, air enters the main cavity through the protective net, and particle impurities in the filtered air flow out of the main cavity through the second hole and then enter the dust collection chamber through the dust inlet; the filtered clean air flows out of the main cavity through the first hole, enters the upper cavity, then flows into the air outlet channel through the first opening, flows out of the air outlet pipe through the second opening and finally flows out of the air outlet. Therefore, on the premise that the filtering effect of the coarse filter is guaranteed, the cleaning efficiency of the coarse filter can be improved, the maintenance period of the coarse filter is prolonged, and manpower and material resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of air filtration, and particularly relates to an air pre-filter and an engine system. Background Art

[0002] An air filter is a common device in an engine system, and its function is to filter out impurities in the air before the air is inhaled into the engine body. There are many types of air filters. For example, a pre-filter is one of them, and the working principle of the pre-filter is to preliminarily filter out particulate impurities in the air through a cyclone tube.

[0003] Taking agricultural vehicles as an example, agricultural vehicles often work in an environment with a large amount of crops such as straw and other sundries. Inevitably, a large amount of particulate impurities will be inhaled into its pre-filter. To avoid malfunctions such as increased fuel consumption, even oil burning and cylinder scoring caused by the blockage of the pre-filter, it is usually necessary to clean the pre-filter frequently. However, most of the pre-filters in the prior art are of an integral structure and it is difficult to clean the residual particulate impurities inside. Therefore, for vehicles that often work in a heavily dusty environment, the maintenance period of its pre-filter is short, and a large amount of manpower and material resources are required.

[0004] Therefore, how to improve the cleaning efficiency of the pre-filter on the premise of ensuring the filtering effect of the pre-filter, and then extend the maintenance period of the pre-filter to save manpower and material resources has become an urgent technical problem in this field. Summary of the Utility Model

[0005] The purpose of the utility model is to at least solve the technical problem of how to improve the cleaning efficiency of the pre-filter on the premise of ensuring the filtering effect of the pre-filter, and then extend the maintenance period of the pre-filter to achieve the goal of saving manpower and material resources. This purpose is achieved through the following technical solutions:

[0006] In the first aspect, the utility model proposes an air coarse filter, which includes: a protective net assembly, including an upper cover and a protective net connected to the upper cover; a base assembly, including a base body and a dust collecting box installed on the base body, a dust collecting chamber is arranged in the dust collecting box, the dust collecting chamber has a dust inlet and a dust outlet, and the dust collecting box is equipped with a blocking plate for blocking the dust outlet; a guide assembly, including an upper plate, a lower plate, an air outlet channel and a plurality of swirl tubes; the protective net is arranged around the outside of the guide assembly, and the space formed between the protective net and the guide assembly constitutes a main cavity; the upper cover is located on the side of the upper plate away from the lower plate, the upper cover is detachably connected to the upper plate, and the space formed between the upper cover and the upper plate constitutes an upper cavity; the air outlet channel extends from the upper plate to the lower plate, the upper plate is provided with a first opening, and the lower plate is provided with a The second opening, the first opening constitutes the air inlet of the air outlet channel, the second opening constitutes the exhaust port of the air outlet channel, and the air outlet channel is connected with the upper cavity through the first opening; the swirl tube is used to introduce particulate impurities in the air into the dust collecting chamber, and is used to introduce filtered air into the upper cavity; the upper plate is provided with a plurality of first holes, and the lower plate is provided with a plurality of second holes, the number of the plurality of first holes, the plurality of second holes and the plurality of swirl tubes are the same and are arranged one by one, in a group of mutually corresponding first holes, second holes and swirl tubes, one end of the swirl tube is connected with the upper cavity through the first hole, and the other end of the swirl tube is connected with the dust collecting chamber through the second hole and the dust inlet; and an air outlet pipe, having an air outlet, and the end of the air outlet pipe away from the air outlet is connected with the air outlet channel through the exhaust port.

[0007] In this air coarse filter, since the protective net is connected to the upper cover, and the upper cover is detachably connected to the upper plate, when the guide assembly is installed, it is only necessary to install the upper cover on the upper plate to realize the overall assembly of the protective net assembly, thereby completing the assembly of the main cavity, and the operation is simple and convenient; when it is necessary to clean the air coarse filter, similarly, the upper cover is removed from the upper plate, and then the protective net assembly is moved away from the upper plate as a whole, so that the cyclone tube inside the main cavity can be exposed, thereby realizing the cleaning of the inside of the air coarse filter. During operation, air enters the main cavity through the protective net to complete the filtration inside the cyclone tube, and the particulate impurities in the filtered air flow out of the main cavity through the second hole after being guided by the cyclone tube, and then enter the dust collecting chamber through the dust inlet; the relatively clean air (i.e., the air with most of the particulate impurities filtered out) flows out of the main cavity through the first hole after being guided by the cyclone tube, and enters the upper cavity, then flows into the air outlet channel through the first opening, then flows out to the air outlet pipe through the second opening, and finally flows out from the air outlet. Therefore, this type of air coarse filter, while ensuring the filtering effect of the coarse filter, can also improve the cleaning efficiency of the coarse filter, thereby extending the maintenance period of the coarse filter, thereby saving manpower and material resources.

[0008] In some embodiments of the present utility model, the upper cover has a mounting surface, the mounting surface is provided with mounting holes, a screw rod is provided on one side of the upper plate facing away from the lower plate, and the screw rod extends along the axial direction of the mounting hole; the air pre-filter further includes a knob handle, the knob handle is used to block the mounting hole, and the knob handle has an internal thread for cooperating with the screw rod, and the knob handle is used to press the upper cover tightly against the upper plate.

[0009] In some embodiments of the present utility model, the upper cover is further provided with a limiting member, and the limiting member is used to limit the knob handle from moving towards the upper plate.

[0010] In some embodiments of the present utility model, the limiting mechanism includes a limiting block, the limiting block protrudes from the mounting surface, and the limiting block has a through hole coaxially arranged with the mounting hole, and the through hole is used for passing through the knob handle, and the orthographic projection of the knob handle on the mounting surface completely covers the orthographic projection of the limiting block on the mounting surface.

[0011] In some embodiments of the present utility model, the cyclone tube includes a first tube and a second tube, the first tube is communicated with the second tube, and the connection part of the first tube and the second tube has an air inlet, one end of the first tube away from the second tube is communicated with the upper cavity through a first hole, and one end of the second tube away from the first tube is communicated with the dust collection chamber through a second hole and a dust inlet.

[0012] In some embodiments of the present utility model, the blocking plate has a first state and a second state relative to the dust outlet, the upper plate and the lower plate are arranged along a first direction, and the dust collection box is located on the side of the lower plate facing away from the upper plate; when the blocking plate is in the first state, the dust outlet is blocked by the blocking plate, the blocking plate and the dust collection chamber are arranged along a second direction, and the second direction is perpendicular to the first direction; when the blocking plate is in the second state, the dust collection chamber is communicated with the outside through the dust outlet.

[0013] In some embodiments of the present utility model, along the first direction, the surface of the dust collection chamber close to the lower plate is the top surface, and the surface of the dust collection chamber away from the lower plate is the bottom surface; when the blocking plate is in the first state, along the direction from the dust collection chamber to the blocking plate, the distance between the bottom surface and the lower plate gradually increases.

[0014] In some embodiments of the present utility model, the blocking plate is connected to the dust collection box through a rotating shaft, the extending direction of the rotating shaft is perpendicular to the first direction, and the extending direction of the rotating shaft is perpendicular to the second direction; along the first direction, the distance between the rotating shaft and the top surface is less than the distance between the rotating shaft and the bottom surface.

[0015] In some embodiments of the present utility model, a plurality of cyclone tubes are arranged at intervals in the circumferential direction of the air outlet channel, there are a plurality of dust collection chambers, and the plurality of dust collection chambers are arranged at intervals in the circumferential direction of the air outlet channel, and each cyclone tube is correspondingly arranged with the dust inlet of a dust collection chamber.

[0016] In a second aspect, the present utility model provides an engine system, and the engine system includes an engine body and any one of the above air pre-filters.

[0017] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented in accordance with the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific implementation manners of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0019] Figure 1 is a schematic structural view of the air pre-filter provided by an embodiment of the present utility model;

[0020] Figure 2 is a schematic view of the air pre-filter provided by an embodiment of the present utility model from another angle;

[0021] Figure 3 is a cross-sectional view of the air pre-filter provided by an embodiment of the present utility model;

[0022] Figure 4 is a schematic structural view of the air pre-filter provided by an embodiment of the present utility model after removing the guard net assembly;

[0023] Figure 5 is a schematic view of the upper plate of the air pre-filter provided by an embodiment of the present utility model;

[0024] Figure 6 is a schematic view of the lower plate of the air pre-filter provided by an embodiment of the present utility model.

[0025] The reference numerals are as follows:

[0026] 100, air pre-filter;

[0027] 1, guard net assembly; 11, upper cover; 111, mounting surface; 1111, limiting block; 12, guard net;

[0028] 21, base body; 22, dust collection box; 221, dust collection chamber; 2211, bottom surface; 2212, top surface; 222, blocking plate; 223, rotating shaft;

[0029] 3. Diverting component; 31. Upper plate; 311. First opening; 312. First hole; 32. Lower plate; 321. Second opening; 322. Second hole; 33. Air outlet channel; 34. Vortex tube; 341. First tube; 342. Second tube; 343. Air inlet

[0030] 4. Main cavity

[0031] 5. Upper cavity

[0032] 6. Air outlet pipe; 61. Air outlet

[0033] 71. Screw; 72. Knob handle; 73. Bracket

[0034] a. Distance between the rotating shaft and the top surface; b. Distance between the rotating shaft and the bottom surface Detailed implementation mode

[0035] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art

[0036] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing" and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used

[0037] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms do not imply an order or sequence when used herein. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0038] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inner", "outer", "inside", "outside", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the exemplary term "below" can include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0039] Figure 1 Schematic diagram of the structure of the air pre-filter provided by the embodiment of the present utility model; Figure 2 Schematic diagram of the air pre-filter provided by the embodiment of the present utility model from another angle; Figure 3 Cross-sectional view of the air pre-filter provided by the embodiment of the present utility model; Figure 4 Schematic diagram of the structure of the air pre-filter provided by the embodiment of the present utility model after removing the guard net assembly; Figure 5 Schematic diagram of the upper plate of the air pre-filter provided by the embodiment of the present utility model; Figure 6 Schematic diagram of the lower plate of the air pre-filter provided by the embodiment of the present utility model.

[0040] Reference Figures 1 to 6, an embodiment of the present utility model provides an air pre-filter 100, which includes: a guard net assembly 1, including an upper cover 11 and a guard net 12 connected to the upper cover 11; a base assembly, including a base body 21 and a dust collection box 22 installed on the base body 21. A dust collection chamber 221 is provided in the dust collection box 22, and the dust collection chamber 221 has an air inlet and an air outlet. The dust collection box 22 is equipped with a plugging plate 222 for plugging the air outlet; a flow guiding assembly, including an upper plate 31, a lower plate 32, an air outlet channel 33 and a plurality of cyclone tubes 34; the guard net 12 is disposed around the outside of the flow guiding assembly, and the space formed between the guard net 12 and the flow guiding assembly constitutes a main cavity 4; the upper cover 11 is located on the side of the upper plate 31 away from the lower plate 32, and the upper cover 11 is detachably connected to the upper plate 31. The space formed between the upper cover 11 and the upper plate 31 constitutes an upper cavity 5; the air outlet channel 33 extends from the upper plate 31 to the lower plate 32. The upper plate 31 is provided with a first opening 311, and the lower plate 32 is provided with a second opening 321. The first opening 311 constitutes the air inlet of the air outlet channel 33, and the second opening 321 constitutes the exhaust port of the air outlet channel 33. The air outlet channel 33 is communicated with the upper cavity 5 through the first opening 311; the cyclone tube 34 is used to introduce particulate impurities in the air into the dust collection chamber 221 and to introduce the filtered air into the upper cavity 5; the upper plate 31 is provided with a plurality of first holes 312, and the lower plate 32 is provided with a plurality of second holes 322. The number of the plurality of first holes 312, the plurality of second holes 322 and the plurality of cyclone tubes 34 is the same and they are arranged in one-to-one correspondence. In a group of corresponding first holes 312, second holes 322 and cyclone tubes 34, one end of the cyclone tube 34 is communicated with the upper cavity 5 through the first hole 312, and the other end of the cyclone tube 34 is communicated with the dust collection chamber 221 through the second hole 322 and the air inlet; and an air outlet pipe 6, having an air outlet 61. The end of the air outlet pipe 6 away from the air outlet 61 is communicated with the air outlet channel 33 through the exhaust port.

[0041] Among them, it is easy to understand that the guard net 12 is a structure including a plurality of meshes for introducing air into the main cavity 4.

[0042] In addition, the upper cover 11 and the guard net 12 can also be connected in a detachable manner. For example, the two can be threadedly connected through a plurality of screws, and the plurality of screws can be evenly spaced around the circumference of the guard net 12 to improve the connection stability.

[0043] Furthermore, in Figure 4 , one cyclone tube 34 is removed for the purpose of facilitating the display of the second hole 322 to more accurately display the connection relationship between the two ends of the cyclone tube 34 and the first hole 312 and the second hole 322 respectively.

[0044] In this embodiment, when the air coarse filter 100 is assembled, since the protective net 12 is connected to the upper cover 11, and the upper cover 11 is detachably connected to the upper plate 31, when the guide assembly is installed, it is only necessary to install the upper cover 11 on the upper plate 31 to realize the overall assembly of the protective net assembly 1, thereby completing the assembly of the main cavity 4, and the operation is simple and convenient; when it is necessary to clean the air coarse filter 100, similarly, the upper cover 11 is removed from the upper plate 31, and then the protective net assembly 1 is moved away from the upper plate 31 as a whole, so that the vortex tube 34 inside the main cavity 4 can be exposed, thereby enabling the interior of the air coarse filter 100 to be cleaned.

[0045] When the air coarse filter 100 is in operation, air enters the main cavity 4 through the protective net 12 to be filtered inside the cyclone tube 34. The particulate impurities in the filtered air are guided by the cyclone tube 34, flow out of the main cavity 4 through the second hole 322, and then enter the dust collecting chamber 221 through the dust inlet; the relatively clean air (i.e., air with most of the particulate impurities filtered out) is guided by the cyclone tube 34, flows out of the main cavity 4 through the first hole 312, and enters the upper cavity 5, and then flows into the air outlet channel 33 through the first opening 311, and then flows out to the air outlet pipe 6 through the second opening 321, and finally flows out from the air outlet 61.

[0046] Therefore, the air coarse filter 100 can improve the cleaning efficiency of the coarse filter while ensuring the filtering effect of the coarse filter, thereby extending the maintenance period of the coarse filter, thereby saving manpower and material resources.

[0047] refer to Figure 1 , Figure 3 and Figure 4 According to an optional embodiment of the utility model, the upper cover 11 has a mounting surface 111, the mounting surface 111 is provided with a mounting hole, a screw 71 is provided on the side of the upper plate 31 away from the lower plate 32, and the screw 71 extends along the axial direction of the mounting hole; the air coarse filter 100 also includes a knob handle 72, the knob handle 72 is used to block the mounting hole, and the knob handle 72 has an internal thread that cooperates with the screw 71, and the knob handle 72 is used to press the upper cover 11 against the upper plate 31.

[0048] A bracket 73 may be provided on the upper plate 31 for mounting the screw rod 71. Figure 4 and Figure 5 shown.

[0049] In this embodiment, the specific connection method of the upper cover 11 and the upper plate 31 is described below with a complete assembly and disassembly process:

[0050] During assembly, first cover the upper cover 11 above the upper plate 31 to ensure that the screw rod 71 is in the axial direction of the mounting hole. Then insert the knob handle 72 into the mounting hole to block it, and sleeved the knob handle 72 on the outer wall of the screw rod 71, so that the internal thread of the knob handle 72 is threadedly engaged with the screw rod 71. Next, turn the knob handle 72 to make the knob handle 72 apply a pressure towards the upper plate 31 to the upper cover 11, so as to press the upper cover 11 tightly against the upper plate 31, thereby realizing the assembly of the upper cover 11 and the upper plate 31.

[0051] During disassembly, similarly, first turn the knob handle 72 in the reverse direction to disconnect the threaded connection between the knob handle 72 and the screw rod 71. Then pull out the knob handle 72 from the mounting hole. Finally, move the upper cover 11 relative to the upper plate 31 to complete the disassembly of the upper cover 11 and the upper plate 31.

[0052] This setting method has stable connection and is simple and convenient to operate, which can further improve the assembly and cleaning efficiency of the air pre-filter 100.

[0053] According to an optional embodiment of the present invention, the upper cover 11 is further provided with a limiting member for restricting the knob handle 72 from moving towards the upper plate 31.

[0054] In this embodiment, during the assembly of the upper cover 11 and the upper plate 31, when the knob handle 72 is threadedly connected to the screw rod 71, if the knob handle 72 is continuously turned, there is a possibility that the upper cover 11 or the upper plate 31 may be damaged due to excessive extrusion force. Therefore, a limiting member is provided on the upper cover 11 to prevent the knob handle 72 from excessively squeezing the upper cover 11, thereby preventing the upper cover 11 and the upper plate 31 from being damaged due to excessive pressure, and improving the service life of the air pre-filter 100 to a certain extent.

[0055] Reference Figure 1 and Figure 3 Specifically, according to an optional embodiment of the present invention, the limiting mechanism includes a limiting block 1111 protruding from the mounting surface 111, and the limiting block 1111 has a through hole coaxially arranged with the mounting hole for passing through the knob handle 72, and the orthographic projection of the knob handle 72 on the mounting surface 111 completely covers the orthographic projection of the limiting block 1111 on the mounting surface 111.

[0056] In this embodiment, the following still takes a complete assembly and disassembly process to illustrate the specific connection method of the upper cover 11 and the upper plate 31:

[0057] During assembly, first cover the upper cover 11 above the upper plate 31 to ensure that the screw rod 71 is in the axial direction of the mounting hole. Then, sequentially insert the knob handle 72 through the through-hole and the mounting hole to block the mounting hole, and sleuth the knob handle 72 on the outer wall of the screw rod 71 so that the internal thread of the knob handle 72 is in threaded engagement with the screw rod 71. Next, rotate the knob handle 72 to enable the knob handle 72 to apply a pressure to the upper cover 11 towards the upper plate 31, so as to press the upper cover 11 tightly against the upper plate 31, thereby realizing the assembly of the upper cover 11 and the upper plate 31. Since the orthographic projection of the knob handle 72 on the mounting surface 111 completely covers the orthographic projection of the limiting block 1111 on the mounting surface 111, that is, the outer contour of the knob handle 72 must be larger than the contour of the through-hole and even the contour of the limiting block 1111. As Figure 1 and Figure 3 shown; when the knob handle 72 rotates and moves downward, due to the presence of the limiting block 1111, it will resist the knob handle 72 from continuing to move downward, that is, the limiting block 1111 cannot "completely pass through" the through-hole, thus playing a limiting role.

[0058] During disassembly, similarly, first reverse-rotate the knob handle 72 to disconnect the threaded connection between the knob handle 72 and the screw rod 71. Then, pull out the knob handle 72 from the mounting hole and the through-hole in sequence. Finally, move the upper cover 11 away from the upper plate 31, that is, complete the disassembly of the upper cover 11 and the upper plate 31.

[0059] With this setting method, due to the presence of the limiting block 1111, it effectively prevents the knob handle 72 from continuously moving towards the upper plate 31, thereby preventing the knob handle 72 from excessively squeezing the upper cover 11, and further preventing the upper cover 11 and the upper plate 31 from being damaged due to excessive pressure; therefore, to a certain extent, the service life of the air pre-filter 100 is improved.

[0060] Refer to Figure 3 and Figure 4 , according to an optional embodiment of the present invention, the cyclone tube 34 includes a first tube 341 and a second tube 342. The first tube 341 is in communication with the second tube 342, and an air inlet 343 is provided at the connection between the first tube 341 and the second tube 342. One end of the first tube 341 away from the second tube 342 is in communication with the upper cavity 5 through a first hole 312, and one end of the second tube 342 away from the first tube 341 is in communication with the dust collection chamber 221 through a second hole 322 and a dust inlet.

[0061] In this embodiment, when the air coarse filter 100 is working, air enters the main cavity 4 through the protective net 12, and then enters the swirl tube 34 through the air inlet 343. The particulate impurities in the filtered air are guided by the second tube 342 and flow out of the main cavity 4 through the second hole 322, and then enter the dust collecting chamber 221 through the dust inlet; the relatively clean air after filtration (i.e., the air with most of the particulate impurities filtered out) is guided by the first tube 341 and then flows out of the main cavity 4 through the first hole 312, and enters the upper cavity 5, and then flows into the air outlet channel 33 through the first opening 311, and then flows out to the air outlet pipe 6 through the second opening 321, and finally flows out from the air outlet 61.

[0062] Therefore, the cyclone tube 34 has a simple structure, is easy to assemble, and can filter particulate impurities in the air well.

[0063] According to an optional embodiment of the present invention, the blocking plate 222 has a first state and a second state relative to the dust outlet, the upper plate 31 and the lower plate 32 are arranged along a first direction, and the dust box 22 is located on the side of the lower plate 32 away from the upper plate 31; when the blocking plate 222 is in the first state, the dust outlet is blocked by the blocking plate 222, and the blocking plate 222 and the dust chamber 221 are arranged along a second direction, and the second direction is perpendicular to the first direction, such as Figures 1 to 4 As shown; when the blocking plate 222 is in the second state, the dust collecting chamber 221 is connected to the outside through the dust outlet.

[0064] It is easy to understand that since the filtered particulate impurities will eventually enter the dust collecting chamber 221, when the air coarse filter 100 is working, the sealing plate 222 should maintain the first state, that is, the sealing plate 222 keeps blocking the dust outlet; when the air coarse filter 100 stops working and it is necessary to clean the particulate impurities accumulated in the dust collecting chamber 221, the sealing plate 222 is adjusted to the second state, that is, the sealing plate 222 is moved out from the dust outlet to release the blockage of the dust outlet, and then the particulate impurities in the dust collecting chamber 221 are cleaned out through the dust outlet.

[0065] In this embodiment, the sealing plate 222 and the dust collecting chamber 221 are arranged along the second direction, that is, the side opening of the dust collecting chamber 221 makes it easier to clean the particulate impurities remaining in the dust collecting chamber 221, thereby improving the cleaning efficiency of the particulate impurities in the dust collecting chamber 221 to a certain extent.

[0066] refer to Figure 3 According to an optional embodiment of the utility model, along the first direction, the side of the dust collecting chamber 221 close to the lower plate 32 is the top surface 2212, and the side of the dust collecting chamber 221 away from the lower plate 32 is the bottom surface 2211; when the blocking plate 222 is in the first state, along the direction of the dust collecting chamber 221 pointing to the blocking plate 222, the distance between the bottom surface 2211 and the lower plate 32 gradually increases.

[0067] In this embodiment, when the blocking plate 222 is in the first state, along the direction from the dust collection chamber 221 to the blocking plate 222, the distance between the bottom surface 2211 and the lower plate 32 gradually increases. That is, the bottom surface 2211 is an "inclined surface", and the position of the bottom surface 2211 closer to the dust outlet is lower. That is to say, when the dust collection chamber 221 is filled with particulate impurities and needs to be cleaned, after the blocking plate 222 is removed from the dust outlet, due to the existence of this "inclined surface", the particulate impurities are more likely to flow out of the dust collection chamber 221 from the dust outlet, thereby further improving the cleaning efficiency of the particulate impurities in the dust collection chamber 221.

[0068] Among them, the contour of the dust collection chamber 221 can be set in the shape of a dustpan, that is, the inner side wall of the dust collection chamber 221 can also be set as an "inclined surface" to make the particulate impurities more likely to flow out of the dust outlet.

[0069] It should be noted that the shape of the dust collection chamber 221 in this embodiment is only for illustrative purposes. Under actual working conditions, it should be based on the specific working conditions requirements, as long as it can facilitate the cleaning of the particulate impurities from the dust outlet, and the specific form is not limited.

[0070] Reference Figures 1 to 4 According to an optional embodiment of the present invention, the blocking plate 222 is connected to the dust collection box 22 through a rotating shaft 223. The extending direction of the rotating shaft 223 is perpendicular to the first direction, and the extending direction of the rotating shaft 223 is perpendicular to the second direction; along the first direction, the distance a between the rotating shaft and the top surface is less than the distance b between the rotating shaft and the bottom surface. Refer to Figure 3 It can be seen that a < b.

[0071] In this embodiment, it is easy to understand that the way the blocking plate 222 is connected to the dust collection box 22 through the rotating shaft 223 is more convenient and reliable when switching the blocking plate 222 between the first state and the second state (that is, switching the blocking plate 222 between blocking the dust outlet and removing it from the dust outlet); in addition, since a < b, it means that the blocking plate 222 is lifted upward when switching from the second state to the first state, which can make the particulate impurities in the dust collection chamber 221 more easily cleaned out from the dust outlet, further improving the cleaning efficiency.

[0072] Among them, a torsion spring can be arranged in cooperation with the rotating shaft 223 to further improve the switching efficiency of the blocking plate 222 between the first state and the second state.

[0073] In addition, the blocking plate 222 can be set to rotate 90° relative to the plane of the dust outlet. The purpose is to make the space of the dust outlet as large as possible when the particulate impurities in the dust collection chamber 221 need to be cleaned, thereby improving the cleaning efficiency.

[0074] It should be noted that the specific structure of the rotating shaft 223 and the rotation angle of the sealing plate 222 in this embodiment are for illustrative purposes only. Under actual working conditions, it should be subject to the specific working conditions requirements, as long as it can conveniently and efficiently clean the particulate impurities in the dust collection chamber 221, and specific limitations are not made.

[0075] According to an optional embodiment of the present invention, a plurality of cyclone tubes 34 are arranged at intervals in the circumferential direction of the air outlet passage 33. There are a plurality of dust collection chambers 221, and the plurality of dust collection chambers 221 are arranged at intervals in the circumferential direction of the air outlet passage 33. Each cyclone tube 34 is correspondingly arranged with the dust inlet of a dust collection chamber 221.

[0076] In this embodiment, since a plurality of cyclone tubes 34 are arranged at intervals in the circumferential direction of the air outlet passage 33, and the air outlet passage 33 is communicated with the air outlet pipe 6, there are multiple positions in the circumferential direction of the air outlet pipe 6 where the dust collection chamber 221 can be arranged. As Figures 1 to 4 shown, two dust collection chambers 221 are provided.

[0077] This setting method can make the air entering the main cavity 4 be filtered more evenly, improving the filtration efficiency.

[0078] As Figures 4 to 6 shown, specifically, the cyclone tubes 34 can be arranged in multiple layers. For example, in the circumferential direction of the air outlet passage 33, the cyclone tubes 34 are arranged in a way that encloses two concentric circles inside and outside. The multiple cyclone tubes 34 in each circle can be evenly arranged at intervals to further improve the uniformity of air filtration.

[0079] In addition, as described above, two dust collection chambers 221 can also be provided, and the two dust collection chambers 221 can be symmetrically arranged relative to the air outlet pipe 6, so as to ensure that the filtered particulate impurities can be relatively evenly distributed into different dust collection chambers 221.

[0080] It should be noted that the arrangement method and quantity of the cyclone tubes 34 and the dust collection chambers 221 in this embodiment are for illustrative purposes only. Under actual working conditions, it should be subject to the specific working conditions requirements, as long as it can improve the uniformity of air filtration and thus improve the filtration efficiency, and specific limitations are not made.

[0081] The embodiment of the present invention also provides an engine system, and the engine system includes an engine body and any one of the above air rough filters 100.

[0082] In this embodiment, the beneficial effects of the engine system are the same as those of any one of the above air rough filters 100, that is, on the premise of ensuring the filtration effect of the rough filter, it can also improve the cleaning efficiency of the rough filter, thereby extending the maintenance period of the rough filter, and thus saving manpower and material resources. Details are not described herein again.

[0083] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An air pre-filter, characterized in that, include: A protective net assembly, comprising an upper cover and a protective net connected to the upper cover; A base assembly, comprising a base body and a dust collecting box mounted on the base body, wherein the dust collecting box has a dust collecting chamber, the dust collecting chamber has a dust inlet and a dust outlet, and the dust collecting box is provided with a blocking plate for blocking the dust outlet; The air guide component comprises an upper plate, a lower plate, an air outlet channel and a plurality of swirl tubes; the protective net is arranged on the outer side of the air guide component, and the space formed between the protective net and the air guide component constitutes a main cavity; the upper cover is located on the side of the upper plate away from the lower plate, the upper cover is detachably connected to the upper plate, and the space formed between the upper cover and the upper plate constitutes an upper cavity; the air outlet channel extends from the upper plate to the lower plate, the upper plate is provided with a first opening, and the lower plate is provided with a second opening, the first opening constitutes an air inlet of the air outlet channel, the second opening constitutes an exhaust port of the air outlet channel, and the air outlet The channel is connected with the upper cavity through the first opening; the cyclone tube is used to introduce particulate impurities in the air into the dust collecting chamber, and is used to introduce filtered air into the upper cavity; the upper plate is provided with a plurality of first holes, and the lower plate is provided with a plurality of second holes, and the number of the plurality of first holes, the plurality of second holes and the plurality of cyclone tubes is the same and is arranged one by one. In a group of the first holes, the second holes and the cyclone tubes corresponding to each other, one end of the cyclone tube is connected with the upper cavity through the first hole, and the other end of the cyclone tube is connected with the dust collecting chamber through the second hole and the dust inlet; and The air outlet pipe has an air outlet, and one end of the air outlet pipe away from the air outlet is connected to the air outlet channel through the exhaust port.

2. The air pre-filter according to claim 1, wherein, The upper cover has a mounting surface, the mounting surface is provided with a mounting hole, a screw is provided on a side of the upper plate away from the lower plate, and the screw extends along the axial direction of the mounting hole; The air coarse filter also includes a knob handle, which is used to block the installation hole, and the knob handle has an internal thread that matches the screw rod, and the knob handle is used to press the upper cover against the upper plate.

3. The air pre-filter according to claim 2, wherein, The upper cover is also provided with a limiting member, and the limiting member is used to limit the movement of the knob handle toward the upper plate.

4. The air pre-filter according to claim 3, characterized in that, The limiting member includes a limiting block, which protrudes from the mounting surface and has a through hole coaxially arranged with the mounting hole, the through hole is used to pass the knob handle, and the orthographic projection of the knob handle on the mounting surface completely covers the orthographic projection of the limiting block on the mounting surface.

5. The air pre-filter according to claim 1, characterized in that, The cyclone tube includes a first tube and a second tube, the first tube is connected to the second tube, and an air inlet is provided at the connection between the first tube and the second tube, an end of the first tube away from the second tube is connected to the upper cavity through the first hole, and an end of the second tube away from the first tube is connected to the dust collecting chamber through the second hole and the dust inlet.

6. The air pre-filter according to claim 1, wherein, The blocking plate has a first state and a second state relative to the dust outlet, the upper plate and the lower plate are arranged along a first direction, and the dust box is located on a side of the lower plate away from the upper plate; When the plugging plate is in the first state, the dust outlet is plugged by the plugging plate, and the plugging plate and the dust collection chamber are arranged in the second direction, which is perpendicular to the first direction; When the plugging plate is in the second state, the dust collection chamber communicates with the outside through the dust outlet.

7. The air pre-filter according to claim 6, wherein, Along the first direction, the surface of the dust collection chamber close to the lower plate is the top surface, and the surface of the dust collection chamber away from the lower plate is the bottom surface; When the plugging plate is in the first state, along the direction from the dust collection chamber to the plugging plate, the distance between the bottom surface and the lower plate gradually increases.

8. The air pre-filter according to claim 7, characterized in that, The plugging plate is connected to the dust collection box through a rotating shaft, the extending direction of the rotating shaft is perpendicular to the first direction, and the extending direction of the rotating shaft is perpendicular to the second direction; along the first direction, the distance between the rotating shaft and the top surface is less than the distance between the rotating shaft and the bottom surface.

9. The air pre-filter according to any one of claims 1-8, characterized in that, A plurality of the cyclone tubes are arranged at intervals in the circumferential direction of the air outlet channel, there are a plurality of the dust collection chambers, and the plurality of the dust collection chambers are arranged at intervals in the circumferential direction of the air outlet channel. Each cyclone tube is correspondingly arranged with the dust inlet of one dust collection chamber.

10. An engine system, characterized in that, It includes an engine body and the air pre-filter according to any one of claims 1-9.

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