Air supply one-way valve of silencer

Abstract

The invention provides an air supply one-way valve of a silencer. The air supply one-way valve comprises a shell, a plurality of first flow deflectors and a plurality of second flow deflectors. The shell is defined by a bottom plate, a first side plate, a second side plate, a third side plate, a fourth side plate and a top plate, an air inlet and an air outlet are formed in the two ends of the shell respectively, the multiple first flow deflectors are parallel to one another, the first ends of the first flow deflectors are connected with the first side plate, and the second ends of the first flow deflectors extend to the middle of the shell and obliquely face the air outlet. The two adjacent first flow deflectors, the first side plate, the top plate and the bottom plate jointly define a first cavity. The first ends of the second flow deflectors are connected with the second side plate, the second ends of the second flow deflectors extend to the middle of the shell and incline towards the air outlet, and the two adjacent second flow deflectors, the second side plate, the top plate and the bottom plate jointly define a second cavity. One-way flowing of airflow is achieved through the structure, dependence on pressure difference is avoided, and one-way conduction of air from the air inlet to the air outlet can be kept all the time.

Description

Technical Field

[0001] The invention relates to the technical field of mufflers, and in particular to a muffler air replenishing one-way valve. Background Art

[0002] The engine muffler in the generator set needs to be supplemented with air during operation, so that the fuel and the catalyst in the muffler can fully react and burn, and reduce harmful gases such as CO, HC, and NOX. The way to supplement the muffler with air is usually to set an air guide elbow to connect the engine's air guide cover with the muffler.

[0003] In the prior art, a reed valve is also provided between the air guide cover and the air guide elbow of the engine to realize the one-way flow of gas. The conduction condition of the reed valve as a one-way valve is that there is a certain pressure difference on both sides of the reed valve so that the elastic reed is elastically bent. When the pressure difference on both sides of the reed valve is small, the reed valve will be closed.

[0004] In practice, it is found that the elastic reed of the reed valve is relatively thin in order to maintain a high sensitivity, and one side of the elastic reed is in contact with the high-temperature gas flowing into the gas guide elbow from the muffler. The repeated elastic bending of the elastic reed during operation can easily cause irreversible deformation of the elastic reed, thereby reducing the effect of the reed valve. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a muffler air supply one-way valve, which can solve or at least alleviate one or more of the above-mentioned problems and other problems in the prior art.

[0006] The present invention provides a muffler air supply one-way valve, comprising:

[0007] A shell, which is surrounded by a bottom plate, a first side plate, a second side plate, a third side plate, a fourth side plate and a top plate, wherein an air inlet and an air outlet are respectively provided at two ends of the shell, and the first side plate and the second side plate are arranged parallel to each other and located between the air inlet and the air outlet;

[0008] a plurality of first guide plates, which are parallel to each other, each of which has a first end and a second end, wherein the first end of the first guide plate is connected to the first side plate, and the second end of the first guide plate extends to the middle of the shell and is inclined toward the air outlet, and two adjacent first guide plates, the first side plate, the top plate, and the bottom plate are together surrounded to form a first cavity; and

[0009] A plurality of second guide plates, which are parallel to each other, each of which has a first end and a second end, wherein the first end of the second guide plate is connected to the second side plate, and the second end of the second guide plate extends to the middle of the shell and is inclined toward the air outlet, and two adjacent second guide plates, the second side plate, the top plate, and the bottom plate are enclosed together to form a second cavity;

[0010] A second guide plate is arranged corresponding to the mouth of each first cavity, and the second end of the second guide plate is located in the mouth of the first cavity; a first guide plate is arranged corresponding to the mouth of each second cavity, and the second end of the first guide plate is located in the mouth of the second cavity; the air inlet is used to communicate with the wind guide cover; the air outlet is used to communicate with the air guide bend.

[0011] Preferably, the surfaces of the first guide vane and the second guide vane facing away from the air inlet are both concave first arc surfaces.

[0012] Preferably, the tangent line of the first curved surface of each first guide plate at the second end of the first guide plate is parallel to the first side plate or the second side plate; the tangent line of the first curved surface of each second guide plate at the second end of the second guide plate is parallel to the first side plate or the second side plate.

[0013] Preferably, the first guide plate and the second guide plate have a surface facing the air inlet that is a second convex curved surface.

[0014] Preferably, the two ends of the third side panel are respectively connected to the first side panel and the second side panel; the two ends of the fourth side panel are respectively connected to the first side panel and the second side panel; the first side panel, the third side panel, the second side panel and the fourth side panel are combined to form a square frame; the top panel and the bottom panel are respectively connected to the square frame from both sides to form the shell; the second end of the first guide plate and the second end of the second guide plate partially or completely overlap in their projections on the fourth side panel.

[0015] Preferably, two first guide plates are provided; three second guide plates are provided; the second end of a second guide plate away from the third side plate among the three second guide plates is connected to the fourth side plate; and the air outlet is opened on the fourth side plate.

[0016] Preferably, the air outlet is opposite to the first curved surface of the first guide plate.

[0017] Preferably, the air inlet is opened in an air inlet area enclosed by the first side plate, the third side plate, and the first guide plate and the second guide plate close to the third side plate.

[0018] Preferably, the air inlet is opened on the bottom plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the technology of the present invention, the one-way flow of the airflow is achieved through the structure, which is independent of the pressure difference and can always maintain the one-way conduction of the gas from the air inlet to the air outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0022] Figure 1 A schematic diagram of the installation position of a muffler air supply check valve in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A three-dimensional diagram of the air supply check valve of the middle muffler;

[0024] Figure 3 for Figure 2 Another stereogram of

[0025] Figure 4 It is the flow field diagram of airflow from the air inlet to the air outlet;

[0026] Figure 5 This is the flow field diagram of the air flowing from the outlet to the inlet.

[0027] Reference numerals:

[0028] 10. Shell; 11. Bottom plate; 111. Air inlet; 12. First side plate; 13. Second side plate; 14. Third side plate; 15. Fourth side plate; 151. Air outlet; 16. Top plate;

[0029] 20. a first guide vane; 21. a first cavity;

[0030] 30. second guide vane; 31. second cavity;

[0031] 40. Air guide hood;

[0032] 50. Air guide elbow;

[0033] 60. First curved surface; 61. Second curved surface. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0035] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] See also Figures 1 to 5This embodiment provides a muffler air supply one-way valve, including a shell 10, a plurality of first guide plates 20 and a plurality of second guide plates 30.

[0041] The housing 10 is surrounded by a bottom plate 11, a first side plate 12, a second side plate 13, a third side plate 14, a fourth side plate 15 and a top plate 16. An air inlet 111 and an air outlet 151 are respectively provided at both ends of the housing 10. The first side plate 12 and the second side plate 13 are arranged parallel to each other and are located between the air inlet 111 and the air outlet 151. Specifically, the bottom plate 11 and the top plate 16 are parallel to each other, the first side plate 12 and the second side plate 13 are parallel to each other, and the third side plate 14 and the fourth side plate 15 are parallel to each other. The first side plate 12, the third side plate 14, the second side plate 13 and the fourth side plate 15 are connected in sequence, and the two sides of the above four are respectively connected to the top plate 16 and the bottom plate 11. The bottom plate 11 is connected to the air scoop 40 of the engine.

[0042] Multiple first guide plates 20 are parallel to each other, and the first guide plates 20 have a first end and a second end. The first end of the first guide plate 20 is connected to the first side plate 12, and the second end of the first guide plate 20 extends to the middle of the shell 10 and is inclined toward the air outlet 151. Two adjacent first guide plates 20 and the first side plate 12, the top plate 16, and the bottom plate 11 together enclose a first cavity 21.

[0043] Multiple second guide plates 30 are parallel to each other, and the second guide plates 30 have a first end and a second end. The first end of the second guide plate 30 is connected to the second side plate 13, and the second end of the second guide plate 30 extends to the middle of the shell 10 and is inclined toward the air outlet 151. Two adjacent second guide plates 30 and the second side plate 13, the top plate 16, and the bottom plate 11 together enclose a second cavity 31.

[0044] A second guide plate 30 is disposed at the mouth of each first cavity 21, and the second end of the second guide plate 30 is located in the mouth of the first cavity 21; a first guide plate 20 is disposed at the mouth of each second cavity 31, and the second end of the first guide plate 20 is located in the mouth of the second cavity 31. The air inlet 111 is used to communicate with the air guide cover 40; the air outlet 151 is used to communicate with the air guide elbow 50.

[0045] In this embodiment, reference Figure 4 In the gas flow field diagram, the airflow in the air guide cover 40 enters the shell 10 through the air inlet 111, flows along the first guide plate 20 and the second guide plate 30 toward the air outlet 151, and finally flows out from the air outlet 151 to the air guide elbow 50 until entering the muffler. During this process, the airflow passes through the mouth of the first cavity 21 and the second cavity 31, and will not enter the first cavity 21 or the second cavity 31.

[0046] refer to Figure 5The gas flow field diagram shows that when the airflow in the muffler flows into the housing 10 through the air outlet 151, the airflow flows into the second cavity 31 through the second end of the first guide plate 20 and the channel between the second guide plate 30. The airflow flows in the second cavity 31 and changes direction, and convects the airflow in the channel between the first guide plate 20 and the second guide plate 30 to achieve the effect of air blocking. Since most of the airflow is rotating and convecting in the second cavity 31 when it enters the second cavity 31, the air blocking effect is better. A small part of the airflow enters the first cavity 21 through the channel between the second end of the second guide plate 30 and the first guide plate 20, and the process of the airflow in the second cavity 31 is repeated.

[0047] Compared with the reed valve, the present one-way valve for replenishing gas can realize the one-way flow of gas through the structure, does not rely on the pressure difference, and can always maintain the one-way conduction of gas from the air inlet 111 to the air outlet 151. In addition, the reed valve relies on the pressure difference to realize its own conduction and closure. When the pressure difference on both sides of the reed valve is small, it will not conduct, that is, the sensitivity is poor, while the present one-way valve can always maintain the conduction of gas flow. Once the pressure difference occurs, the gas flow can flow from the air inlet 111 to the air outlet 151. Moreover, compared with the reed valve, the present one-way valve has fewer parts and lower costs.

[0048] In one embodiment, the first guide vane 20 and the second guide vane 30 both have a first concave arc surface 60 on a surface facing away from the air inlet 111 .

[0049] The first curved surface 60 of the first guide plate 20 is the inner wall side of the first cavity 21. When the airflow passes through the channel between the second end of the second guide plate 30 and the first guide plate 20 and enters the first cavity 21, the airflow flows along the first guide plate 20 and contacts the inner wall of the first side plate 12, and then flows along the first curved surface 60 of the other first guide plate 20 on the other side. The first curved surface 60 guides the airflow so that the airflow can flow back and convect with the airflow that is entering the first cavity 21, thereby preventing the airflow from further flowing into the first cavity 21, and achieving an air blocking effect. The first curved surface 60 on the second guide plate 30 acts in the second cavity 31 in the same way.

[0050] In one embodiment, the tangent line of the first curved surface of each first guide plate 20 at the second end of the first guide plate 20 is parallel to the first side plate 12 or the second side plate 13. The tangent line of the first curved surface of each second guide plate 30 at the second end of the second guide plate 30 is parallel to the first side plate 12 or the second side plate 13.

[0051] In this embodiment, when the airflow flows into the housing 10 through the air outlet 151, the channel between the second end of the first guide plate 20 and the second guide plate 30 is temporarily recorded as channel A, and the channel between the second end of the second guide plate 30 and the first guide plate 20 is temporarily recorded as channel B. Whether the airflow flows in the first cavity 21 or the second cavity 31, the airflow will be guided by the first arc surface 60 and will directly form convection with the airflow flowing out of channel A and channel B, thereby forming air resistance and improving the air resistance effect.

[0052] In one embodiment, the first guide vane 20 and the second guide vane 30 both have a second convex curved surface 61 facing the air inlet 111 .

[0053] In this embodiment, when the airflow flows from the air inlet 111 to the air outlet 151 , the second arc surface 61 can guide the airflow so that the airflow flows smoothly.

[0054] In one embodiment, the two ends of the third side panel 14 are respectively connected to the first side panel 12 and the second side panel 13; the two ends of the fourth side panel 15 are respectively connected to the first side panel 12 and the second side panel 13; the first side panel 12, the third side panel 14, the second side panel 13 and the fourth side panel 15 are combined to form a square frame; the top panel 16 and the bottom panel 11 are respectively connected to the square frame from both sides to form a shell 10; the second end of the first guide plate 20 and the second end of the second guide plate 30 partially or completely overlap in projection on the fourth side panel 15.

[0055] In this embodiment, due to the position setting of the second end of the first guide plate 20 and the second end of the second guide plate 30; on the one hand, when the airflow flows from the air inlet 111 to the air outlet 151, the trajectory of the airflow passing through each channel A, channel B and the mouth of the first cavity 21 and the mouth of the second cavity 31 is relatively smooth and not very tortuous (see Figure 4 ), so that the airflow effect is better, so that the flow rate is higher; on the other hand, reference Figure 5 When the airflow flows from the air outlet 151 in the reverse direction to the air inlet 111, when the airflow flows from the first A channel to the second cavity 31, the second arc surface 61 of a second guide plate 30 forming the second cavity 31 guides the airflow, and the second end of the other second guide plate 30 is located at the edge of the flow field, thereby reducing the airflow from the B channel there to the next first cavity 21, so that more airflow can be blocked in the second cavity 31, thereby improving the air blocking effect, so that fewer first guide plates 20 and second guide plates 30 can achieve an effective air blocking effect, saving costs and reducing volume.

[0056] In one embodiment, two first guide vanes 20 are provided; three second guide vanes 30 are provided; the second end of one of the three second guide vanes 30 away from the third side plate 14 is connected to the fourth side plate 15; the air outlet 151 is provided on the fourth side plate 15. In practice, it is found that the first guide vanes 20 and the second guide vanes 30 are provided in the above number to achieve a better effect and reduce the volume of the one-way valve.

[0057] In one embodiment, the air outlet 151 is opposite to the first curved surface 60 of the first guide plate 20. Specifically, the air outlet 151 is opposite to the first curved surface 60 of the first guide plate 20 closest to the fourth side plate 15. The first guide plate 20 blocks the air flow flowing into the air outlet. The first guide plate 20 and the first side plate 12, the fourth side plate 15, the top plate 16, and the bottom plate 11 here also enclose an incomplete "first cavity 21", so that the air flow can be partially blocked here when flowing from the air outlet 151 to the air inlet 111, thereby further improving the air blocking effect.

[0058] In one embodiment, the air inlet 111 is provided in an air inlet area surrounded by the first side plate 12, the third side plate 14, and the first guide plate 20 and the second guide plate 30 close to the third side plate 14. The air inlet 111 is provided on the bottom plate 11.

[0059] The air inlet 111 is located between the first end of the first guide plate 20 and the first end of the second guide plate 30 close to the third side plate 14. The air inlet 111 is opened on the bottom plate 11 and can be directly connected to the air guide cover 40. When the air guide cover 40 is formed, the bottom plate 11, the first side plate 12, the second side plate 13, the third side plate 14 and the fourth side plate 15 of the one-way valve can also be directly formed, thereby reducing costs.

[0060] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A muffler air supply check valve, characterized in that: include: A shell (10) is formed by a bottom plate (11), a first side plate (12), a second side plate (13), a third side plate (14), a fourth side plate (15) and a top plate (16); an air inlet (111) and an air outlet (151) are respectively provided at two ends of the shell (10); the first side plate (12) and the second side plate (13) are arranged parallel to each other and are located between the air inlet (111) and the air outlet (151); a plurality of first guide plates (20) which are parallel to each other, wherein the first guide plates (20) have a first end and a second end, wherein the first end of the first guide plate (20) is connected to the first side plate (12), and the second end of the first guide plate (20) extends to the middle of the shell (10) and is inclined toward the air outlet (151), and two adjacent first guide plates (20) together with the first side plate (12), the top plate (16), and the bottom plate (11) form a first cavity (21); and a plurality of second guide plates (30) which are parallel to each other, wherein the second guide plates (30) have a first end and a second end, wherein the first end of the second guide plate (30) is connected to the second side plate (13), and the second end of the second guide plate (30) extends to the middle of the shell (10) and is inclined toward the air outlet (151), and two adjacent second guide plates (30) together with the second side plate (13), the top plate (16), and the bottom plate (11) form a second cavity (31); A second guide plate (30) is arranged correspondingly to the mouth of each first cavity (21), and the second end of the second guide plate (30) is located inside the mouth of the first cavity (21); a first guide plate (20) is arranged correspondingly to the mouth of each second cavity (31), and the second end of the first guide plate (20) is located inside the mouth of the second cavity (31); the air inlet (111) is used to communicate with the air guide cover (40); and the air outlet (151) is used to communicate with the air guide elbow (50).

2. A muffler air supply check valve as claimed in claim 1, characterized in that: The surfaces of the first guide plate (20) and the second guide plate (30) facing away from the air inlet (111) are both concave first arc surfaces (60).

3. A muffler air supply check valve as claimed in claim 2, characterized in that: The tangent line of the first curved surface of each first guide plate (20) at the second end of the first guide plate (20) is parallel to the first side plate (12) or the second side plate (13); the tangent line of the first curved surface of each second guide plate (30) at the second end of the second guide plate (30) is parallel to the first side plate (12) or the second side plate (13).

4. A muffler air supply check valve as claimed in claim 3, characterized in that: The first guide plate (20) and the second guide plate (30) have a surface facing the air inlet (111) that is a second convex curved surface (61).

5. A muffler air supply check valve as claimed in claim 4, characterized in that: The two ends of the third side plate (14) are respectively connected to the first side plate (12) and the second side plate (13); the two ends of the fourth side plate (15) are respectively connected to the first side plate (12) and the second side plate (13); the first side plate (12), the third side plate (14), the second side plate (13) and the fourth side plate (15) are combined to form a square frame; the top plate (16) and the bottom plate (11) are respectively connected to the square frame from two sides to form the shell (10); the second end of the first guide plate (20) and the second end of the second guide plate (30) partially or completely overlap in projection on the fourth side plate (15).

6. A muffler air supply check valve as claimed in claim 5, characterized in that: Two first guide plates (20) are provided; three second guide plates (30) are provided; the second end of a second guide plate (30) away from the third side plate (14) among the three second guide plates (30) is connected to the fourth side plate (15); and the air outlet (151) is provided on the fourth side plate (15).

7. A muffler air supply check valve as claimed in claim 6, characterized in that: The air outlet hole (151) is opposite to the first curved surface (60) of the first guide plate (20).

8. A muffler air supply check valve as claimed in claim 7, characterized in that: The air inlet (111) is opened in an air inlet area enclosed by the first side plate (12), the third side plate (14), the first guide plate (20) and the second guide plate (30) close to the third side plate (14).

9. A muffler air supply check valve as claimed in claim 8, characterized in that: The air inlet (111) is opened on the bottom plate (11).

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