Air filter

Abstract

The utility model relates to an air filter which comprises a filter main body, a filter cover and a fixing component, a first end of the filter main body is provided with a connector used for being in butt joint with an air inlet connecting pipe, a second end of the filter main body is a closed end, and an air inlet flow channel is formed between the first end and the second end of the filter main body. An opening of the filter cover faces downwards, the filter cover covers the filter main body in the direction from the second end to the first end of the filter main body, and the filter cover covers the air inlet flow channel and comprises two polyester fiber net layers and a polyester fiber cotton layer arranged between the two polyester fiber net layers; the fixing member is used for fixing the open end of the filter cover to the first end of the filter body. The filter cover is made of polyester fibers and can bear the temperature of gas backflow without being burnt and deformed, and meanwhile, the fixing component can fix the opening end of the filter cover, so that the problem that the opening end of the filter cover is flanged under the action of high temperature, airflow or other external force is solved, and the problem that the filter cover fails to filter is avoided.

Description

Technical Field

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

[0002] like Figure 1 and Figure 2 As shown, the air intake flow of the air filter of the marine engine includes a filter frame 1, a filter screen 2 and a filter cover, wherein the first end of the filter frame 1 is provided with an interface for docking with the air intake pipe 4, the second end is a closed end, and a hollow structure is formed between the first end and the second end of the filter frame 1, the filter screen 2 covers the hollow structure, the filter cover covers the filter screen 2 and the outside of the filter frame 1, and the air is mainly filtered through the filter cover during operation. During actual operation, there will be backflow of high-temperature gas at the air intake pipe 4, and the temperature of the high-temperature gas is usually around 120°C. Therefore, due to the backflow of high-temperature gas, the filter cover 6 of the existing air filter will be burned and deformed by the high-temperature gas and will have the problem of flanging, resulting in filtering failure. Utility Model Content

[0003] The utility model aims to provide an air filter to solve the problem that the air filter is burned and deformed by the high-temperature gas flowing back from the air intake pipe and the flanging causes filtering failure.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An air filter comprises a filter body, a filter cover and a fixing component, wherein the first end of the filter body is provided with an interface for docking with an air intake pipe, the second end of the filter body is a closed end, an inlet air flow passage is formed between the first end and the second end of the filter body, the filter cover is a cover body which is open at one end and circumferentially closed at the other end, the filter cover opens downward and is arranged outside the filter body in a direction from the second end to the first end of the filter body, the filter cover covers the inlet air flow passage, the filter cover comprises two layers of polyester fiber mesh and a polyester fiber cotton layer arranged between the two layers of polyester fiber mesh, and the fixing component is used to fix the open end of the filter cover to the first end of the filter body.

[0006] In one embodiment of the present application, the fixing member is a clamp.

[0007] In one embodiment of the present application, the filter cover is provided with an avoidance hole for avoiding the lifting structure on the filter body.

[0008] In one embodiment of the present application, the filter body includes a filter frame, a filter net and a reinforcing rib, the interface is arranged at the first end of the filter frame, the second end of the filter frame is a closed end, a hollow structure is arranged between the first end and the second end of the filter frame to form the inlet air flow channel, the filter net covers the hollow structure, the reinforcing rib is arranged in the hollow structure, the two ends of the reinforcing rib are respectively connected to the first end and the second end of the filter frame, and the reinforcing rib is arranged in a close fit with the filter net.

[0009] In one embodiment of the present application, the filter frame includes a base, an upper cover and support ribs, a plurality of support ribs are circumferentially arranged between the base and the upper cover, two ends of the support ribs are respectively connected to the base and the upper cover, the base is provided with the interface, and the hollow structure is formed between two adjacent support ribs.

[0010] In one embodiment of the present application, the reinforcing rib is arranged at an angle to the supporting rib.

[0011] In one embodiment of the present application, the reinforcing ribs on both sides of one of the supporting ribs are arranged at an angle.

[0012] In one embodiment of the present application, the support ribs include a first rib plate and a second rib plate, the first rib plate and the second rib plate are detachably connected to clamp and fix the filter screen, and at least one of the first rib plate and the second rib plate located downstream of the filter screen along the air intake direction is connected to the base and the upper cover at both ends, respectively.

[0013] In one embodiment of the present application, the reinforcing rib is a sheet-like rib, and both ends of the sheet-like rib are respectively provided with an enlarged portion, and the enlarged portion is used to connect with the base or the upper cover.

[0014] In one embodiment of the present application, the reinforcing rib is located at a downstream position of the filter screen along the air intake direction, or the reinforcing rib is respectively arranged at an upstream position and a downstream position of the filter screen along the air intake direction.

[0015] It can be seen from the above technical scheme that the utility model discloses an air filter, which includes a filter body, a filter cover and a fixing component, wherein the first end of the filter body is provided with an interface for docking with an intake pipe, the second end of the filter body is a closed end, and an intake air flow path is formed between the first end and the second end of the filter body for air to enter the interior of the air filter from here, the filter cover is an open end and a circumferentially closed cover body at the other end, the filter cover opens downward and is arranged outside the filter body in a direction from the second end to the first end of the filter body, the filter cover covers the intake air flow path and the filter body provides support for the filter cover to prevent the filter cover from excessive deformation under the action of air pressure, the filter cover includes two layers of polyester fiber mesh layers and a polyester fiber cotton layer arranged between the two layers of polyester fiber mesh layers, and the fixing component is used to fix the open end of the filter cover to the first end of the filter body.

[0016] The above-mentioned filter cover is made of polyester fiber, and the temperature limit of this material is 140°C, which is 120°C higher than the temperature of gas backflow at the air inlet pipe. Therefore, it can withstand the temperature of gas backflow without being burned or deformed. At the same time, the fixing component can fix the opening end of the filter cover to prevent the opening end of the filter cover from flanging under high temperature, airflow or other external forces, thereby avoiding the problem of filtering failure of the filter cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 or the description of the prior art 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.

[0018] Figure 1 It is a structural schematic diagram of an air filter in the prior art;

[0019] Figure 2 It is a schematic diagram of the installation of an air filter and an air intake pipe in the prior art;

[0020] Figure 3 A schematic diagram of the structure of an air filter provided by an embodiment of the utility model;

[0021] Figure 4 A schematic structural diagram of a filter cover of an air filter provided in an embodiment of the utility model;

[0022] Figure 5 A cross-sectional view of a filter cover of an air filter provided in an embodiment of the utility model;

[0023] Figure 6A front view of a filter body of an air filter provided by an embodiment of the utility model;

[0024] Figure 7 A side view of a filter body of an air filter provided in an embodiment of the utility model.

[0025] In the figure:

[0026] 1 is a filter frame; 1a is a closed end; 1b is an interface; 110 is an upper cover; 120 is a supporting rib; 130 is a base; 131 is a sleeve portion; 132 is a flange portion; 133 is a connecting portion; 140 is a reinforcing rib; 141 is a main body portion; 142 is an enlarged portion; 2 is a filter screen; 3 is an air intake pipe; 310 is a flange matching portion; 4 is a filter cover; 4a is an avoidance hole; 410 is a polyester fiber mesh layer; 420 is a polyester fiber cotton layer; 5 is a clamp; and 6 is a lifting ring. DETAILED DESCRIPTION

[0027] The core of the utility model is to provide an air filter, the structural design of which can solve the problem that the air filter is burned and deformed by the high-temperature gas flowing back from the air intake pipe and the flanging causes filtering failure.

[0028] 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.

[0029] See also Figures 3 to 5 , Figure 3 A schematic diagram of the structure of an air filter provided in an embodiment of the utility model, Figure 4 A schematic diagram of the structure of the filter cover of the air filter provided in the embodiment of the utility model, Figure 5 A cross-sectional view of a filter cover of an air filter provided in an embodiment of the utility model.

[0030] The utility model discloses an air filter in an embodiment. The air filter comprises a filter body, a filter cover 4 and a fixing component.

[0031] Among them, the first end of the filter body is provided with an interface 1b for docking with the air intake pipe 3, and the second end of the filter body is a closed end 1a. An inlet flow passage is formed between the first end and the second end of the filter body for air to enter the interior of the air filter from here. The filter cover 4 is an open cover at one end and a circumferentially closed cover at the other end. The filter cover 4 opens downward and is arranged outside the filter body from the second end to the first end of the filter body. The filter cover 4 covers the inlet flow passage and the filter body provides support for the filter cover 4 to prevent the filter cover 4 from excessive deformation under the action of air pressure. The filter cover 4 includes two layers of polyester fiber mesh layers 410 and a polyester fiber cotton layer 420 arranged between the two layers of polyester fiber mesh layers 410. The fixing component is used to fix the open end of the filter cover 4 to the first end of the filter body.

[0032] Compared with the prior art, the filter cover 4 in the air filter provided by the embodiment of the utility model is made of polyester fiber, the temperature limit of which is 140°C, which is higher than the temperature of the gas backflow at the air intake pipe 3 by 120°C, so it can withstand the temperature of the gas backflow without being burnt and deformed. At the same time, the fixing member can fix the open end of the filter cover 4 to prevent the open end of the filter cover 4 from flanging under high temperature, airflow or other external forces, thereby avoiding the problem of filtering failure of the filter cover 4.

[0033] The fixing member is preferably annular in shape, so as to fix the open end of the filter cover 4 in the circumferential direction. In the embodiment of the utility model, the fixing member is a clamp 5, which may include one or more clamps 5. The clamp 5 is annular in shape, and the length of the clamp 5 is adjustable to fully embrace the open end of the filter cover 4.

[0034] It is foreseeable that the air intake volume of marine engines is relatively large. Taking the air filter of some large marine engines as an example, the air intake flow rate of a single air filter is required to be 12000kg / h. Therefore, the volume of the air filter is relatively large. In order to facilitate installation, it is usually necessary to set a lifting structure on the filter body of the air filter, such as Figures 1 to 3 As shown, in a specific embodiment of the utility model, the lifting structure includes two lifting rings 6, and the two lifting rings 6 are symmetrically arranged on the top of the filter body. Of course, it should be noted that the lifting structure is not limited to the structure of the lifting rings 6, and other structures can also be adopted, which are not limited here. In order to facilitate the installation of the filter cover 4, and also to make the filter cover 4 fit with the top of the filter body, the filter cover 4 is provided with a avoidance hole 4a for avoiding the lifting structure on the filter body. The avoidance hole 4a matches the structure, number and size of the lifting structure to ensure that the lifting structure can pass through the avoidance hole 4a. Of course, it should be noted that the avoidance hole 4a is not only used to avoid the lifting structure. If the filter frame 1 has other protruding structures, the installation of the filter cover 4 can also be facilitated by setting the avoidance hole 4a.

[0035] Since the air filter used in marine engines is usually large in size, in order to ensure the intake flow rate when the diameter of the intake pipe 3 is constant, the air filter needs to be longer. During the bench vibration test, the upper cover 110 position of the air filter farthest from the fixed position may have the problem of exceeding the limit value of vibration. To avoid the far end of the air filter from vibrating beyond the limit, please refer to Figure 6 and Figure 7 In the embodiment of the utility model, the filter body includes a filter frame 1, a filter screen 2 and a reinforcing rib 140, wherein the interface 1b is arranged at the first end of the filter frame 1, the second end of the filter frame 1 is a closed end 1a, a hollow structure is arranged between the first end and the second end of the filter frame 1 to form an inlet airflow channel, the filter screen 2 covers the hollow structure, and a reinforcing rib 140 is arranged in the hollow structure, and the two ends of the reinforcing rib 140 are respectively connected to the first end and the second end of the filter frame 1, the reinforcing rib 140 is arranged in close contact with the filter screen 2, and the reinforcing rib 140 is arranged along the inlet airflow channel. Towards the upstream and / or downstream of the filter screen 2, the reinforcing rib 140 and the filter screen 2 can be connected and fixed by welding, fixing with cable ties, connecting with threaded fasteners, etc. Of course, if the reinforcing rib 140 is provided at the downstream position of the filter screen 2 along the air intake direction, the filter screen 2 can also be simply made to cling to the reinforcing rib 140 without being fixed. In this case, by providing the reinforcing rib 140 at the hollow structure, the strength of the filter frame 1 is improved, thereby improving the overall strength of the air filter, which can effectively solve the problem of the vibration of the air filter exceeding the limit at the far end of the air intake pipe 3.

[0036] Specifically, Figure 6 and Figure 7 As shown, the filter frame 1 includes a base 130, an upper cover 110 and a support rib 120. A plurality of support ribs 120 are arranged circumferentially between the base 130 and the upper cover 110. The two ends of the support rib 120 are connected to the base 130 and the upper cover 110 respectively. The support rib 120 and the base 130 and the upper cover 110 can be independent structures from each other, that is, the support rib 120 and the base 130 are detachably connected and the support rib 120 and the upper cover 110 are detachably connected, or the base 130 and the upper cover 110 are detachably connected. At least one of the covers 110 is an integral structure with the support rib 120, that is, the base 130, the upper cover 110 and the support rib 120 can be formed as one piece, or one of the base 130 and the upper cover 110 is an integral structure with the support rib 120, and the other of the base 130 and the upper cover 110 is detachably connected to the support rib 120, and the base 130 is provided with an interface 1b, that is, the base 130 is connected to the air intake pipe 3, and a hollow structure is formed between two adjacent support ribs 120.

[0037] Along the air intake direction, the support ribs 120 can be located at the upstream position and / or downstream position of the filter screen 2. In the embodiment of the utility model, in order to enable the support ribs 120 to provide effective support to the filter screen 2 and reduce the deformation of the filter screen 2 during operation, a plurality of support ribs 120 are arranged at least at the downstream position of the filter screen 2.

[0038] It should be noted that, depending on the shapes of the base 130 and the upper cover 110, the cross-sectional shape of the filter frame 1 can be rectangular, circular, elliptical, etc. Figure 6 and Figure 7 As shown, the cross-section of the filter frame 1 is rectangular, that is, at least four support ribs 120 are arranged between the base 130 and the upper cover 110, wherein the four support ribs 120 are distributed at the four corners. Of course, if the dimension of the cross-section of the filter frame 1 in the length direction or the width direction is larger, additional support ribs 120 can be provided between the support ribs 120 between two adjacent corners to provide effective support for the filter screen 2.

[0039] It should be noted that the cross-sectional shape of the support ribs 120 at the four corners may be the same as or different from the support ribs 120 at other positions. In the embodiment of the utility model, the cross-sectional shape of the support ribs 120 at the four corners is L-shaped, and the cross-sectional shape of the support ribs 120 at other positions may be straight, L-shaped or T-shaped.

[0040] To facilitate connection and fixation with the air intake pipe 3, the base 130 includes an intermediate sleeve portion 131, a flange portion 132 and a connecting portion 133. The flange portion 132 is arranged at one end of the intermediate sleeve portion 131. The intermediate sleeve portion 131 has a hollow cavity. Accordingly, a flange matching portion 310 is arranged at the pipe end of the air intake pipe 3. The flange portion 132 and the flange matching portion 310 are detachably connected by threaded fasteners, and the cavity of the intermediate sleeve portion 131 is connected to the air intake pipe 3 to form an intake air flow channel. The connecting portion 133 is arranged at the other end of the intermediate sleeve portion 131. The connecting portion 133 is used to connect the support rib 120 and the filter screen 2.

[0041] In order to further improve the strength of the filter frame 1, in the embodiment of the utility model, as Figure 6 and Figure 7 As shown, the reinforcing rib 140 and the supporting rib 120 are arranged at an angle, so that a triangular or approximately triangular supporting structure can be formed between the reinforcing rib 140 and one or both sides of the supporting rib 120. By utilizing the high stability of the triangular structure, the filter frame 11 can be made stronger, more stable, and less prone to shaking, and the supporting effect on the filter screen 2 can be improved, preventing the filter screen 2 from deforming under the pressure of the filter cover 4 and the airflow during the operation of the air filter.

[0042] Preferably, if Figure 6 and Figure 7 As shown, in one embodiment of the utility model, the reinforcing ribs 140 on both sides of a supporting rib 120 are arranged at an angle, and even the angle between two adjacent reinforcing ribs 140 is also adopted, so that a triangular or approximately triangular supporting structure is formed between the two reinforcing ribs 140, thereby utilizing the high stability of the triangular structure to further improve the strength of the filter frame 1.

[0043] In one embodiment of the utility model, the above-mentioned support rib 120 includes a first rib plate and a second rib plate, and the first rib plate and the second rib plate are detachably connected to clamp and fix the filter screen 2, and the two ends of at least one of the first rib plate and the second rib plate located downstream of the filter screen 2 along the air intake direction are respectively connected to the base 130 and the upper cover 110. The support rib 120 of this two-piece structure can clamp and fix the filter screen 2, position the filter screen 2, further improve the stability of the filter screen 2, and reduce the deformation of the filter screen 2, thereby avoiding the appearance of a gap between the filter cover 4 and the filter screen 2 due to the deformation of the filter screen 2, thereby ensuring the filtering effect of the air filter. Of course, the reinforcement rib 140 can also adopt the above-mentioned two-piece structure.

[0044] like Figure 6 and Figure 7 As shown, in one embodiment of the present invention, the reinforcing rib 140 is a sheet rib, which includes a main body 141 and an enlarged portion 142 disposed at both ends of the main body 141. The enlarged portion 142 is used to connect with the base 130 or the upper cover 110. The width of the enlarged portion 142 is greater than the width of the main body 141. Figure 6 and Figure 7 It can be seen that the width of the expansion portion 142 gradually increases from the end connected to the main body 141. The structural design of the sheet ribs can increase the support area of ​​the filter 2, and the expansion portions 142 at both ends can enhance the connection strength between the reinforcing ribs 140 and the upper cover 110 and the base 130.

[0045] To further optimize the above technical solution, it can be foreseen that during the operation of the air filter, the filter screen 2 will be under pressure along the air intake direction. Therefore, in an embodiment of the utility model, the reinforcing rib 140 is located at the downstream position of the filter screen 2 along the air intake direction, or, the reinforcing rib 140 is respectively provided at the upstream position and the downstream position of the filter screen 2 along the air intake direction to ensure that the filter screen 2 has sufficient support.

[0046] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0047] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An air filter, characterized in that: The filter cover comprises a filter body, a filter cover and a fixing component, wherein the first end of the filter body is provided with an interface for docking with an air intake pipe, the second end of the filter body is a closed end, an air intake passage is formed between the first end and the second end of the filter body, the filter cover is an open end and a circumferentially closed cover body at the other end, the filter cover opens downward and is arranged outside the filter body in a direction from the second end to the first end of the filter body, the filter cover covers the air intake passage, the filter cover comprises two layers of polyester fiber mesh and a polyester fiber cotton layer arranged between the two layers of polyester fiber mesh, and the fixing component is used to fix the open end of the filter cover to the first end of the filter body.

2. The air filter according to claim 1, characterized in that The fixing component is a clamp.

3. The air filter according to claim 1, characterized in that The filter cover is provided with an avoidance hole for avoiding the lifting structure on the filter body.

4. The air filter according to claim 1, characterized in that The filter body includes a filter frame, a filter screen and reinforcing ribs. The interface is arranged at the first end of the filter frame, and the second end of the filter frame is a closed end. A hollow structure is arranged between the first end and the second end of the filter frame to form the inlet air flow channel. The filter screen covers the hollow structure, and the reinforcing ribs are arranged in the hollow structure. The two ends of the reinforcing ribs are respectively connected to the first end and the second end of the filter frame, and the reinforcing ribs are arranged in a close fit with the filter screen.

5. The air filter according to claim 4, characterized in that The filter frame includes a base, an upper cover and support ribs. A plurality of support ribs are circumferentially arranged between the base and the upper cover. Two ends of the support ribs are respectively connected to the base and the upper cover. The base is provided with the interface, and the hollow structure is formed between two adjacent support ribs.

6. The air filter according to claim 5, characterized in that The reinforcing ribs are arranged at an angle to the supporting ribs.

7. The air filter according to claim 5, characterized in that The reinforcing ribs on both sides of one of the supporting ribs are arranged at an angle.

8. The air filter according to any one of claims 5 to 7, characterized in that: The supporting ribs include a first rib plate and a second rib plate, the first rib plate and the second rib plate are detachably connected to clamp and fix the filter screen, and at least one of the first rib plate and the second rib plate located downstream of the filter screen along the air intake direction is connected to the base and the upper cover at both ends, respectively.

9. The air filter according to any one of claims 5 to 7, characterized in that: The reinforcing ribs are sheet-shaped ribs, and both ends of the sheet-shaped ribs are respectively provided with enlarged parts, and the enlarged parts are used to be connected to the base or the upper cover.

10. The air filter according to any one of claims 4 to 7, characterized in that: The reinforcing ribs are located at a downstream position of the filter screen along the air intake direction, or the reinforcing ribs are respectively arranged at an upstream position and a downstream position of the filter screen along the air intake direction.

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