Air filtering device

Abstract

The utility model discloses an air filter device, which relates to the technical field of agricultural equipment and comprises an air filter body, a first filter component, a second filter component and an upper end cover. An upper cavity and a lower cavity are formed in the air filter body, and a communicating channel is further formed in the air filter body; the first filter assembly is arranged in the upper cavity, and the second filter assembly is arranged in the lower cavity; the upper cavity is provided with an upper end opening which can be closed by the inner wall of the upper end cover; a first annular air inlet channel is formed between the inner side wall of the lower end part of the upper end cover and the outer side wall of one end part of the air filter body; a second annular air inlet channel is arranged in the upper cavity, the first annular air inlet channel, the second annular air inlet channel, the first filtering assembly, the communicating channel and the second filtering assembly are sequentially communicated, and the outlet end of the second filtering assembly is communicated with the air outlet. The device can filter soil, dust and sand in the working environment, protect an engine, reduce the damage rate of equipment, improve the working continuity and guarantee the working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural equipment, in particular to an air filtering device. Background Art

[0002] In agricultural production, ridge cultivation is the most common cultivation mode. Ridge cultivation has the advantages of promoting crop root growth, drainage and waterlogging prevention, and centralized fertilization, which is beneficial to improving crop quality and yield. Ridge cultivation requires a certain ridge depth and ridge surface flatness, and mechanized operations are usually used. Due to the poor working environment in the southern fields, soil splashing and dust spreading are very likely to occur during ditching and ridge-forming operations. When the ditching and ridge-forming equipment is operating in this environment, impurities such as dust and soil can easily enter the engine, and after a certain period of operation, the engine cylinder will be damaged, affecting operating efficiency and increasing maintenance costs. Utility Model Content

[0003] The utility model aims to provide an air filtering device to solve the problems existing in the above-mentioned prior art, and can filter mud and dust in the working environment, protect the engine, reduce the damage rate of equipment, improve the continuity of operation, and ensure the working efficiency.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] The utility model provides an air filter device, comprising an air filter body, a first filter assembly, a second filter assembly and an upper end cover; the air filter body has an upper cavity and a lower cavity located below the upper cavity in the vertical direction, the air filter body is also provided with a communication channel, and the air filter body is provided with an air outlet; the first filter assembly is arranged in the upper cavity, and the second filter assembly is arranged in the lower cavity; the upper cavity has an upper end opening, the upper end cover is fixedly covered at the upper end opening, and the inner wall of the upper end cover can close the upper end opening; the inner side wall of the lower end part of the upper end cover A first annular air inlet channel is formed between the outer side wall of one end portion of the air filter body having the upper end opening; a second annular air inlet channel is provided in the upper cavity, the inlet end of the second annular air inlet channel is connected with the outlet end of the first annular air inlet channel, and the outlet end of the second annular air inlet channel is connected with the inlet end of the first filter assembly in the upper cavity, the outlet end of the first filter assembly is connected with the upper end of the connecting channel, the lower end of the connecting channel is connected with the inlet end of the second filter assembly in the lower cavity, and the outlet end of the second filter assembly is connected with the air outlet.

[0006] Preferably, a filter is provided in the first annular air inlet passage, and the filter can perform coarse filtering on the gas passing therethrough.

[0007] Preferably, the first filter assembly includes a first filter cotton assembly and a first filter oil, the first filter oil is located at the bottom of the upper cavity, the first filter cotton assembly is located above the first filter oil, the upper end of the first filter cotton assembly extends out of the upper end opening and abuts against the inner wall of the upper end cover; the second annular air inlet channel is formed between the outer wall of the first filter cotton assembly and the inner wall of the upper cavity.

[0008] Preferably, the second filter assembly includes a second filter cotton assembly and a second filter oil, the second filter oil is located at the bottom of the lower cavity, the second filter surface assembly is located above the second filter oil, and the air outlet is arranged on the lower cavity above the second filter surface assembly.

[0009] Preferably, the communication channel is located in the center of the air filter body.

[0010] Preferably, the upper end cover includes a conical cover and an extended ring plate, the lower end of the conical cover is fixedly connected to the upper end of the extended ring plate, the extended ring plate is sleeved on the outer side of one end of the air filter body having the upper end opening, and the first annular air inlet channel is formed between the inner side wall of the extended ring plate and the outer side wall of the end portion of the air filter body having the upper end opening.

[0011] Preferably, the filter element comprises a plurality of inclined plates, each of which is fixedly disposed on an outer side wall of the air filter body in the first annular air inlet passage, and each of the inclined plates forms an angle with the air inlet direction of the first annular air inlet passage.

[0012] Preferably, the air filter body includes a middle end piece and a lower end piece; the middle end piece has the upper cavity at its upper end in the vertical direction, and the middle end piece has the first cavity at its lower end in the vertical direction, the first cavity has a lower opening, the lower end piece has a second cavity, the second cavity has an upper opening, the upper opening and the lower opening cooperate with each other, and the second filter assembly is arranged in the second cavity; the first cavity and the second cavity together form the lower cavity; the middle end piece is provided with a first channel running through the middle end piece in the vertical direction, and the lower end of the second channel is provided in the lower end piece, the lower end of the first channel can be connected with the upper end of the second channel, and the lower end of the second channel is connected with the inlet end of the second filter assembly in the second cavity; the first channel and the second channel together form the connecting channel; the air outlet is arranged on the side wall of the middle end piece and is connected with the first cavity.

[0013] Compared with the prior art, the utility model has achieved the following technical effects:

[0014] The air filtering device provided by the utility model is installed in a vertical state, and is equipped with a first annular air inlet channel for downward air intake, which effectively prevents large particles such as soil from entering the filtering working environment; and is equipped with a curved air intake path, that is, it first passes through the first annular air inlet channel and then enters the second annular air inlet channel through the curved path, the second annular air inlet channel is filtered by the first filter component through the curved path and then enters the connecting channel through the curved path, and then enters the second filter component through the curved path after passing through the connecting channel, and finally the clean air after multiple curved paths and double-stage filtration is discharged from the air outlet to supply the engine's air intake needs. The structure of the first annular air inlet channel for downward air intake and the multiple curved paths with double-stage filtration can filter the impurities entrained by the gas in the working environment to the greatest extent, protect the engine, reduce the equipment damage rate, improve the operation continuity, and protect the operation efficiency.

[0015] Furthermore, the filter element disposed in the first annular air inlet passage can perform coarse filtering on the incoming gas, thereby further improving the filtering effect and ensuring a cleaner supply of filtered gas.

[0016] Furthermore, oil bath filtration is adopted, and the first filter oil carried in the oil-filtered gas is intercepted by the first filter cotton component, and the two are combined to achieve a cleaner filtering effect.

[0017] Furthermore, the second filter cotton component also adopts oil bath filtration, which has a simple structure, a high degree of component sharing, low cost, and is convenient for daily maintenance and repair.

[0018] Furthermore, the connecting channel is arranged at the inner central position of the air filter body. Based on the negative pressure environment formed by the suction power from the engine, the connecting channel arranged at the central position can make the circumferential air intake of the first annular air intake channel and the second annular air intake channel more uniform and stable, so that the incoming gas can be filtered more evenly through the first filter component, thereby improving the filtering effect.

[0019] Furthermore, the upper end cover is composed of a conical cover and an extended ring plate. The extended ring plate is located outside one end of the air filter body, thereby forming a first annular air inlet passage. The structure is simple and the processing and manufacturing are convenient and reliable.

[0020] Furthermore, a plurality of inclined plates are used to form a filter element, and particles entrained in the gas will collide with the inclined plates after entering the first annular air inlet passage, thereby intercepting and shielding the particles and causing them to fall, with a simple structure and low cost.

[0021] Furthermore, the air filter body is composed of two parts, namely a middle end part and a lower end part, and has a simple structure, which facilitates the installation, disassembly and maintenance of the second filter component, and adopts a split structure, which occupies little space in the split state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The overall structural diagram of the air filter device provided by the utility model;

[0024] Figure 2 A schematic diagram of the internal structure of the air filter device provided by the utility model;

[0025] Figure 3 A schematic diagram of the arrangement of the inclined plate in the air filter device provided by the utility model;

[0026] Figure 4 A schematic diagram of air flow of the air filter device provided by the utility model.

[0027] In the figure:

[0028] 100- air filter;

[0029] 1-upper end cover; 11-conical cover; 12-extended ring plate;

[0030] 2-middle end piece; 21-upper cavity; 22-first cavity; 23-first channel; 24-air outlet; 25-inclined plate; 26-connecting bracket;

[0031] 3-lower end piece; 31-second cavity; 32-second passage;

[0032] 4-first filter cotton component;

[0033] 5-First filter oil;

[0034] 6- second filter cotton component;

[0035] 7- Second filter oil;

[0036] 8-first annular air inlet passage;

[0037] 9- Second annular air inlet passage. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] The utility model aims to provide an air filtering device to solve the problems existing in the prior art, and can filter mud and dust in the working environment, protect the engine, reduce the damage rate of equipment, improve the continuity of operation, and ensure the working efficiency.

[0040] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Embodiment 1

[0042] This embodiment provides an air filter device 100, which is mainly but not limited to being used for air filtration on a furrowing and ridging machine. Figure 1 to Figure 4 As shown, it includes an air filter body, a first filter assembly, a second filter assembly and an upper end cover 1; the air filter body has an upper cavity 21 and a lower cavity located below the upper cavity 21 in the vertical direction, the air filter body is also provided with a communication channel, and the air filter body is provided with an air outlet 24; the first filter assembly is arranged in the upper cavity 21, and the second filter assembly is arranged in the lower cavity; the upper cavity 21 has an upper end opening, the upper end cover 1 is fixedly covered at the upper end opening, and the inner wall of the upper end cover 1 can close the upper end opening; the inner side wall of the lower end part of the upper end cover 1 is connected to the air filter body A first annular air inlet channel 8 is formed between the outer side walls of one end portion of the body having an opening at the upper end; a second annular air inlet channel 9 is provided in the upper cavity 21, the inlet end of the second annular air inlet channel 9 is connected with the outlet end of the first annular air inlet channel 8, and the outlet end of the second annular air inlet channel 9 is connected with the inlet end of the first filter component in the upper cavity 21, the outlet end of the first filter component is connected with the upper end of the connecting channel, the lower end of the connecting channel is connected with the inlet end of the second filter component in the lower cavity, and the outlet end of the second filter component is connected with the air outlet 24.

[0043] The vertical installation posture is adopted, and the structure of the first annular air inlet channel 8 for downward air intake is adopted, so as to effectively prevent the large particles such as soil from entering the filtering working environment; and the curved air intake path is adopted, that is, it first passes through the first annular air inlet channel 8 and then enters the second annular air inlet channel 9 through the curved path, and the second annular air inlet channel 9 passes through the curved path and then is filtered by the first filter component and then enters the connecting channel through the curved path, and then enters the second filter component through the curved path after passing through the connecting channel, and finally the clean air after multiple curved paths and double-stage filtration is discharged from the air outlet 24 to supply the engine air intake needs. The structure of the first annular air inlet channel 8 for downward air intake and the multiple curved paths with double-stage filtration can filter the impurities entrained by the gas in the working environment to the greatest extent, protect the engine, reduce the equipment damage rate, improve the operation continuity, and protect the operation efficiency.

[0044] The specific structures of the first filter assembly and the second filter assembly are as follows:

[0045] Specifically, the first filter assembly and the second filter assembly are used to filter impurities in the gas, and they can be any existing filter element structure, including but not limited to the following filters:

[0046] Among the optional solutions of this embodiment, it is more preferred that Figure 2 As shown, the first filter assembly includes a first filter cotton assembly 4 and a first filter oil 5, the first filter oil 5 is located at the bottom of the upper cavity 21, the first filter cotton assembly 4 is located above the first filter oil 5, the upper end of the first filter cotton assembly 4 extends out of the upper end opening and abuts against the inner wall of the upper end cover 1; a second annular air inlet channel 9 is formed between the outer wall of the first filter cotton assembly 4 and the inner wall of the upper cavity 21. Oil bath filtration is adopted, and the first filter oil 5 carried in the oil-filtered gas is intercepted by the first filter cotton assembly 4, and the two are combined to achieve a cleaner filtering effect.

[0047] Among the optional solutions of this embodiment, it is more preferred that Figure 2 As shown, the second filter assembly includes a second filter cotton assembly 6 and a second filter oil 7. The second filter oil 7 is located at the bottom of the lower cavity, the second filter cotton assembly 6 is located above the second filter oil 7, and the air outlet 24 is arranged on the lower cavity above the second filter surface assembly. The second filter cotton assembly 6 also adopts oil bath filtration, which has a simple structure, a high degree of component sharing, low cost, and is convenient for daily maintenance and repair.

[0048] The structure of the upper end cover 1 is as follows:

[0049] Among the optional solutions of this embodiment, it is more preferred that Figure 1 to Figure 3As shown, the upper end cover 1 includes a conical cover 11 and an extended ring plate 12, the lower end of the conical cover 11 is fixedly connected to the upper end of the extended ring plate 12, the extended ring plate 12 is sleeved on the outer side of one end of the air filter body with an upper end opening, and the inner side wall of the extended ring plate 12 and the outer side wall of the end portion of the air filter body with an upper end opening form a first annular air inlet passage 8. The upper end cover 1 is composed of a conical cover 11 and an extended ring plate 12, and the extended ring plate 12 is located outside one end of the air filter body, thereby forming the first annular air inlet passage 8, which has a simple structure and is convenient and reliable to manufacture.

[0050] Specifically, a connecting bracket 26 is fixedly provided on the air filter body, and the connecting bracket 26 is fixedly connected to the upper end cover 1 through a connecting piece.

[0051] Specifically, one end of the connecting bracket 26 is fixed on the inner wall of the connecting channel, and the other end of the connecting bracket 26 is provided with a threaded hole. A through hole is provided on the conical cover 11 of the upper end cover 1. The connecting piece is a bolt, and the threaded end of the bolt passes through the through hole and is threadedly connected to the threaded hole to fix the upper end cover 1 on the connecting bracket 26.

[0052] Among them, the structure of the air filter body is as follows:

[0053] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 2 As shown, the air filter body includes a middle end piece 2 and a lower end piece 3; the middle end piece 2 has an upper cavity 21 at its upper end in the vertical direction, and a first cavity 22 at its lower end in the vertical direction, the first cavity 22 has a lower opening, and a second cavity 31 is provided in the lower end piece 3, the second cavity 31 has an upper opening, the upper opening and the lower opening cooperate with each other, and a second filter component is provided in the second cavity 31; the first cavity 22 and the second cavity 31 jointly form a lower cavity; a first channel 23 penetrating along the vertical direction is provided in the middle end piece 2, and a second channel 32 is provided in the lower end piece 3, the lower end of the first channel 23 can be communicated with the upper end of the second channel 32, and the lower end of the second channel 32 is communicated with the inlet end of the second filter component in the second cavity 31; the first channel 23 and the second channel 32 jointly form a connecting channel; the air outlet 24 is arranged on the side wall of the middle end piece 2 and is communicated with the first cavity 22. The air filter body is composed of two parts, a middle end part 2 and a lower end part 3, and has a simple structure, which is convenient for installation, disassembly and maintenance of the second filter component. In addition, it adopts a split structure and occupies little space in the split state.

[0054] Specifically, the inner bottom of the second cavity 31 is used to hold a certain height of the second filter oil 7, and the second filter cotton assembly 6 is arranged above the second filter oil 7. A support structure for supporting the second filter cotton assembly 6 is fixedly arranged in the second cavity 31, thereby ensuring the distance between the lower end of the second filter cotton assembly 6 and the second filter oil 7. Similarly, a support structure for supporting the first filter cotton assembly 4 is also arranged in the upper cavity 21, thereby ensuring the distance between the lower end of the first filter cotton assembly 4 and the first filter oil 5.

[0055] Specifically, the distance between the lower end of the first filter cotton component 4 and the liquid level of the first filter oil 5 and the distance between the lower end of the second filter cotton component 6 and the liquid level of the second filter oil 7 can be set according to actual conditions, which can ensure that the gas passes through the first filter oil 5 or the second filter oil 7 before passing through the corresponding first filter cotton component 4 or the second filter cotton component 6.

[0056] Specifically, a contact surface can be provided at a position corresponding to the first cavity 22 of the middle end member 2, which is used to contact the upper end of the second filter cotton component 6, so that the second filter cotton component 6 can be firmly fixed in the lower cavity. When the middle end member 2 is covered on the lower end member 3, the contact surface contacts the upper end of the second filter cotton component 6. Similarly, a corresponding contact surface can also be provided at a position corresponding to the upper end of the first filter cotton component 4 on the inner side wall of the upper end cover 1.

[0057] Specifically, the fixed connection between the middle end piece 2 and the lower end piece 3 adopts an existing structure that can be quickly disassembled and assembled. For example, the lower end of the middle end piece 2 is provided with a buckle, and the upper end of the lower end piece 3 is provided with a corresponding slot, that is, a snap-on structure; the fixed connection can also be achieved by providing an annular clamp at the joint of the middle end piece 2 and the lower end piece 3.

[0058] Specifically, an annular sealing ring may be added at the joint of the middle end piece 2 and the lower end piece 3 according to actual sealing conditions to ensure the sealing effect of the joint.

[0059] Among the optional solutions of this embodiment, it is more preferred that Figure 2 As shown, the communication channel is located in the center of the air filter body. The communication channel is set in the center of the air filter body. Based on the negative pressure environment formed by the suction power from the engine, the communication channel set in the center can make the circumferential air intake of the first annular air intake channel 8 and the second annular air intake channel 9 more uniform and stable, so that the incoming gas can be filtered more evenly through the first filter assembly, thereby improving the filtering effect.

[0060] In order to increase the filtering effect, a filter element may be further provided in the first annular air inlet passage 8, as follows:

[0061] Among the optional solutions of this embodiment, it is more preferred that Figure 2 and Figure 3 As shown, a filter is provided in the first annular air inlet passage 8, and the filter can roughly filter the passing gas. The filter provided in the first annular air inlet passage 8 can roughly filter the incoming gas, thereby further improving the filtering effect and ensuring a cleaner filtered gas supply.

[0062] Specifically, the filter element can be the following inclined plates 25 that are evenly arranged in sequence at circumferential positions, or it can be an annular filter screen or other existing structures that can achieve coarse filtration; and the inclined plate 25 can be fixed on the outer wall of the air filter body (specifically the outer wall of the middle end piece 2), or it can be fixed on the inner wall of the upper end cover 1 (specifically the inner wall of the extended ring plate 12).

[0063] Among the optional solutions of this embodiment, it is more preferred that Figure 2 and Figure 3 As shown, the filter element includes a plurality of inclined plates 25, each of which is fixedly arranged on the outer wall of the air filter body in the first annular air inlet passage 8, and each of the inclined plates 25 has an angle with the air inlet direction of the first annular air inlet passage 8. The filter element is formed by using a plurality of inclined plates 25, and the particles entrained in the gas will collide with the inclined plates 25 after entering the first annular air inlet passage 8, thereby intercepting and blocking the particles and causing them to fall, and the structure is simple and the cost is low.

[0064] Specifically, the inclined plate 25 is a flat plate, and its plane forms an angle of 30° to 45° with the upper end surface of the first filter cotton component 4 .

[0065] Specifically, the setting of the inclined plate 25 can also make the incoming gas form a vortex. As the intake volume demand of the engine changes, the centrifugal force is used to throw some particulate matter in the gas to the inner wall of the first annular intake channel 8 away from the air filter body and fall through the first annular intake channel 8.

[0066] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An air filter device, characterized in that: It includes an air filter body, a first filter assembly, a second filter assembly and an upper end cover; The air filter body has an upper cavity and a lower cavity located below the upper cavity in the vertical direction, a communication channel is also provided inside the air filter body, and an air outlet is provided on the air filter body; The first filter assembly is disposed in the upper cavity, and the second filter assembly is disposed in the lower cavity; The upper cavity has an upper end opening, the upper end cover is fixedly covered at the upper end opening, and the inner wall of the upper end cover can close the upper end opening; a first annular air inlet passage is formed between the inner side wall of the lower end portion of the upper end cover and the outer side wall of the end portion of the air filter body having the upper end opening; A second annular air inlet channel is provided in the upper cavity, the inlet end of the second annular air inlet channel is connected with the outlet end of the first annular air inlet channel, and the outlet end of the second annular air inlet channel is connected with the inlet end of the first filter assembly in the upper cavity, the outlet end of the first filter assembly is connected with the upper end of the connecting channel, the lower end of the connecting channel is connected with the inlet end of the second filter assembly in the lower cavity, and the outlet end of the second filter assembly is connected with the air outlet.

2. The air filter device according to claim 1, characterized in that: A filter is provided in the first annular air inlet passage, and the filter can perform coarse filtering on the gas passing through.

3. The air filter device according to claim 1, characterized in that: The first filter assembly includes a first filter cotton assembly and a first filter oil, the first filter oil is located at the bottom of the upper cavity, the first filter cotton assembly is located above the first filter oil, and the upper end of the first filter cotton assembly extends out of the upper end opening and abuts against the inner wall of the upper end cover; The second annular air inlet passage is formed between the outer side wall of the first filter cotton component and the inner side wall of the upper cavity.

4. The air filter device according to claim 1, characterized in that: The second filter assembly includes a second filter cotton assembly and a second filter oil, the second filter oil is located at the bottom of the lower cavity, the second filter cotton assembly is located above the second filter oil, and the air outlet is arranged on the lower cavity above the second filter cotton assembly.

5. The air filter device according to claim 1, characterized in that: The communication channel is located at the center of the air filter body.

6. The air filter device according to claim 5, characterized in that: The upper end cover includes a conical cover and an extended ring plate, the lower end of the conical cover is fixedly connected to the upper end of the extended ring plate, the extended ring plate is sleeved on the outer side of one end of the air filter body having the upper end opening, and the first annular air inlet channel is formed between the inner side wall of the extended ring plate and the outer side wall of the end portion of the air filter body having the upper end opening.

7. The air filter device according to claim 2, characterized in that: The filter element includes a plurality of inclined plates, each of which is fixedly disposed on an outer side wall of the air filter body in the first annular air inlet passage, and each of the inclined plates has an angle with the air inlet direction of the first annular air inlet passage.

8. The air filter device according to claim 1, characterized in that: The air filter body comprises a middle end piece and a lower end piece; The upper end of the middle end piece along the vertical direction has the upper cavity, the lower end of the middle end piece along the vertical direction has a first cavity, the first cavity has a lower opening, the lower end piece has a second cavity, the second cavity has an upper opening, the upper opening and the lower opening cooperate with each other, the second filter assembly is arranged in the second cavity; the first cavity and the second cavity together form the lower cavity; The middle end piece is provided with a first channel penetrating in a vertical direction, and the lower end piece is provided with a second channel, the lower end of the first channel can be communicated with the upper end of the second channel, and the lower end of the second channel is communicated with the inlet end of the second filter assembly in the second cavity; the first channel and the second channel together form the communicating channel; The air outlet is arranged on the side wall of the middle end piece and communicates with the first cavity.

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