Front-stage catalyst assembly

Abstract

The utility model relates to the technical field of preceding-stage catalytic converters, in particular to a preceding-stage catalytic converter assembly which comprises a cylinder body, an air inlet and an air outlet are formed in the two ends of the cylinder body respectively, a three-way catalyst core body is installed in the cylinder body, a partition piece is installed on the inner side of the air inlet, and the partition piece is installed on the outer side of the cylinder body. A dispersing plate is installed in the portion, on one side of the air inlet, of the cylinder, a plurality of dispersing holes are formed in the side face of the dispersing plate, a partition piece is arranged in the air inlet, tail gas entering through the air inlet can be divided through the partition piece, and then the flowing direction of the tail gas is changed; the tail gas entering from the gas inlet does not intensively scour the center of the end face of the three-way catalyst core body, so that carbon is easily deposited at the center position of the three-way catalyst core body, the dispersion plate is arranged, the entered tail gas can be further dispersed through a plurality of dispersion holes, the divergence of the tail gas is improved, and the service life of the three-way catalyst core body is prolonged. The influence on subsequent use caused by carbon deposition at the central position of the three-way catalyst core body is further prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of pre-catalytic converters, and particularly relates to a pre-catalytic converter assembly. Background Art

[0002] The pre-catalytic converter is the most important purification device installed in the automobile exhaust system. It can convert harmful gases such as carbon monoxide, hydrocarbons, and nitrogen oxides discharged from automobile exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions.

[0003] The existing pre-catalytic converter includes a catalytic converter cylinder body with an air inlet end and an air outlet end, and a three-way catalyst core body arranged inside the catalytic converter cylinder body. The air inlet end of the catalytic converter cylinder body is connected to the exhaust outlet of the engine. After the automobile exhaust emitted by the engine enters the inside of the catalytic converter cylinder body and undergoes oxidation and reduction reactions through the three-way catalyst core body, it is discharged from the air outlet end of the catalytic converter cylinder body. The inner diameter of the air inlet end of the catalytic converter cylinder body is generally smaller than the inner diameter of the catalytic converter cylinder body and the cross-section of the three-way catalyst core body. Therefore, the automobile exhaust flowing into the catalytic converter cylinder body from the air inlet end of the catalytic converter cylinder body concentrates on flushing the center of the end face of the three-way catalyst core body. When the automobile exhaust enters the catalytic converter cylinder body and contacts the three-way catalyst core body, the divergence is poor, resulting in easy carbon deposition at the center position of the three-way catalyst core body.

[0004] Therefore, it is necessary to provide a pre-catalytic converter assembly to solve the above technical problems. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a pre-catalytic converter assembly.

[0006] A pre-catalytic converter assembly provided by the utility model includes a cylinder body. An air inlet and an air outlet are respectively arranged at both ends of the cylinder body. The air inlet is connected to an intake pipe, and the air outlet is connected to an exhaust pipe. A three-way catalyst core body is installed inside the cylinder body. A partition member is installed inside the cylinder body on one side of the air inlet. A dispersion plate is installed inside the cylinder body on one side of the air inlet. A plurality of dispersion holes are arranged on the side surface of the dispersion plate. The dispersion plate is located between the three-way catalyst core body and the air inlet.

[0007] Preferably, the partition member includes a partition cylinder. The partition cylinder has an open structure at both ends. A plurality of partition plates are connected to the outer surface of the partition cylinder.

[0008] Preferably, the number of the partition plates is four, and the partition plates are distributed in a cross shape on the outer surface of the partition cylinder.

[0009] Preferably, the two sides of a second partition plate are connected to the side surfaces of adjacent partition plates. The second partition plate is inclined.

[0010] Preferably, a plurality of sliding holes are provided on the inner wall of the intake pipe, and a plurality of sliding grooves are provided on the inner wall of the air inlet. The number of the sliding holes is the same as that of the sliding grooves and they correspond to each other one by one. One end of the corresponding sliding hole communicates with one end of the sliding groove, and the outer wall of the partition plate is slidably connected to the inner wall of the sliding hole.

[0011] Preferably, a conversion cylinder is provided on the cylinder body between the partition plate and the air inlet. The shape of the conversion cylinder is frustum-shaped, and the inner diameter of the conversion cylinder at the end facing the air inlet is smaller than the inner diameter of the other end of the conversion cylinder.

[0012] Preferably, the shape of the dispersion hole is a frustum structure, and the size of the dispersion hole at the end facing the air inlet is smaller than the size of the other end of the dispersion hole.

[0013] Compared with the related art, a pre-catalytic converter assembly provided by the present utility model has the following beneficial effects:

[0014] 1. By providing a partition member in the air inlet, the present utility model can divide the exhaust gas entering through the air inlet by the partition member, thereby changing the flow direction of the exhaust gas, preventing the exhaust gas entering from the air inlet from concentrating on flushing the center of the end face of the three-way catalyst core, which may cause carbon deposition at the center position of the three-way catalyst core. By providing a dispersion plate, the exhaust gas entering can be further dispersed through a plurality of dispersion holes, improving the dispersion of the exhaust gas, and further preventing carbon deposition at the center position of the three-way catalyst core and affecting subsequent use;

[0015] 2. By providing an inclined second partition plate, the present utility model can further divide the space between the partition plates, improving the dispersion of the treated exhaust gas, and further improving the dispersion of the treated exhaust gas by inclining the second partition plate.

[0016] 3. By providing sliding holes and sliding grooves and slidably connecting them with the partition plate, the present utility model facilitates the installation and disassembly of the partition member, and can limit the partition member through the sliding groove to prevent it from entering the inner side of the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a preferred embodiment of a pre-catalytic converter assembly provided by the present utility model;

[0018] Figure 2 is Figure 1 a schematic structural diagram of the interior of a pre-catalytic converter assembly shown;

[0019] Figure 3 is Figure 1 a schematic structural diagram of the partition member shown;

[0020] Reference numerals in the figures: 1, cylinder body; 2, intake pipe; 3, outlet pipe; 4, air inlet; 5, air outlet; 6, three-way catalyst core; 7, conversion cylinder; 8, dispersion plate; 9, dispersion holes; 10, partition member; 11, sliding hole; 12, partition cylinder; 13, partition plate; 14, second partition plate. Detailed implementation manners

[0021] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0023] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the embodiments of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, if terms such as "first", "second", "third", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0025] In addition, if terms such as "horizontal", "vertical", "hanging" are used, it does not mean that the component is required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0026] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if the terms "set", "installed", "connected", and "connected" appear, they 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0028] Reference Figures 1 to 3 , a pre-catalytic converter assembly provided by the present invention includes: a cylinder body 1, an air inlet 4 and an air outlet 5 are respectively arranged at both ends of the cylinder body 1, the air inlet 4 is connected to an intake pipe 2, the air outlet 5 is connected to an exhaust pipe 3, a three-way catalyst core 6 is installed inside the cylinder body 1, a separator 10 is installed inside the air inlet 4, a dispersion plate 8 is installed inside the cylinder body 1 on one side of the air inlet 4, a plurality of dispersion holes 9 are arranged on the side surface of the dispersion plate 8, and the dispersion plate 8 is located between the three-way catalyst core 6 and the air inlet 4.

[0029] In the embodiment of the present invention, with reference to Figure 3 as shown, the separator 10 includes a separator cylinder 12, the separator cylinder 12 has an open structure at both ends, and a plurality of separator plates 13 are connected to the outer surface of the separator cylinder 12.

[0030] In the embodiment of the present invention, with reference to Figure 3 as shown, the number of the separator plates 13 is four, and the separator plates 13 are distributed in a cross shape on the outer surface of the separator cylinder 12.

[0031] It should be noted that: by arranging the separator 10 in the air inlet 4, the tail gas entering through the air inlet 4 can be divided by the separator 10, so that the flow direction of the tail gas is changed.

[0032] By arranging the dispersion plate 8, the entering tail gas can be further dispersed through a plurality of dispersion holes 9, improving the dispersion of the tail gas and further preventing carbon deposition at the central position of the three-way catalyst core 6, which affects subsequent use.

[0033] In the embodiment of the present invention, with reference to Figure 3 as shown, the sides of adjacent separator plates 13 are connected to both sides of a second separator plate 14, and the second separator plate 14 is inclined.

[0034] It should be noted that by setting the second partition plate 14 at an angle, the space between the partition plates 13 can be further divided to improve the dispersion of the treated exhaust gas, and by setting the second partition plate 14 at an angle, the dispersion of the treated exhaust gas can be further improved.

[0035] In the embodiments of the present invention, reference is made to Figure 2 As shown, the inner wall of the air intake pipe 2 is provided with a plurality of sliding holes 11, and the inner wall of the air intake port 4 is provided with a plurality of sliding grooves. The number of the sliding holes 11 is consistent with the number of the sliding grooves and corresponds one to one. One end of the relative sliding hole 11 is connected to one end of the sliding groove, and the inner wall of the sliding hole 11 is slidably connected to the outer wall of the partition plate 13.

[0036] It should be noted that by providing the sliding hole 11 and the sliding groove, and slidingly connecting with the partition plate 13, the installation and disassembly of the partition 10 are facilitated, and the partition 10 can be limited by the sliding groove to prevent it from entering the inner side of the cylinder 1.

[0037] In the embodiments of the present invention, reference is made to Figure 2 As shown, a conversion cylinder 7 is provided on the cylinder body 1 between the partition plate 13 and the air inlet 4. The conversion cylinder 7 is in a truncated cone shape. The inner diameter of one end of the conversion cylinder 7 facing the air inlet 4 is smaller than the inner diameter of the other end of the conversion cylinder.

[0038] It should be noted that the exhaust gas can be diffused by providing the conversion cylinder 7 with a truncated cone structure.

[0039] In the embodiments of the present invention, reference is made to Figure 2 As shown, the dispersion hole 9 is in the shape of a truncated cone structure, and the size of one end of the dispersion hole 9 facing the air inlet 4 is smaller than the size of the other end of the dispersion hole 9.

[0040] The working principle of a pre-stage catalyst assembly provided by the utility model is as follows:

[0041] By setting a partition 10 in the air inlet 4, the exhaust gas entering through the air inlet 4 can be divided by the partition 10, thereby changing the flow direction of the exhaust gas, so that the exhaust gas entering through the air inlet 4 will not concentrate on the end surface center of the three-way catalyst core 6, thereby causing carbon deposition in the center of the three-way catalyst core 6. By setting a dispersion plate 8, the incoming exhaust gas can be further dispersed through a plurality of dispersion holes 9, thereby improving the divergence of the exhaust gas and further preventing carbon deposition in the center of the three-way catalyst core 6 to affect subsequent use.

[0042] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0043] The above are only embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A front-stage catalyst assembly, characterized in that: include: A cylinder (1), wherein an air inlet (4) and an air outlet (5) are respectively arranged at both ends of the cylinder (1), wherein the air inlet (4) is connected to an air inlet pipe (2), and the air outlet (5) is connected to an air outlet pipe (3), wherein a three-way catalyst core (6) is installed inside the cylinder (1), wherein a partition (10) is installed inside the air inlet (4), wherein a dispersion plate (8) is installed inside the cylinder (1) on one side of the air inlet (4), wherein a plurality of dispersion holes (9) are arranged on the side of the dispersion plate (8), and wherein the dispersion plate (8) is located between the three-way catalyst core (6) and the air inlet (4).

2. A pre-catalyst assembly according to claim 1, characterized in that: The separator (10) comprises a separator tube (12), the separator tube (12) is a structure with openings at both ends, and the outer surface of the separator tube (12) is connected to a plurality of separator plates (13).

3. A pre-catalyst assembly according to claim 2, characterized in that: The number of the partition plates (13) is four, and the partition plates (13) are distributed in a cross shape on the outer surface of the partition cylinder (12).

4. A front-stage catalyst assembly according to claim 3, characterized in that: The side surfaces of the adjacent partition plates (13) are connected to the two sides of the second partition plate (14), and the second partition plate (14) is arranged at an angle.

5. The front-stage catalyst assembly according to claim 1, characterized in that: The inner wall of the air inlet pipe (2) is provided with a plurality of sliding holes (11), and the inner wall of the air inlet (4) is provided with a plurality of sliding grooves. The number of the sliding holes (11) is consistent with the number of the sliding grooves and corresponds one to one. One end of the corresponding sliding hole (11) is connected to one end of the sliding groove. The inner wall of the sliding hole (11) is slidably connected to the outer wall of the partition plate (13).

6. A front-stage catalyst assembly according to claim 2, characterized in that: The cylinder (1) between the partition plate (13) and the air inlet (4) is provided with a conversion cylinder (7), the shape of the conversion cylinder (7) is a truncated cone, and the inner diameter of one end of the conversion cylinder (7) facing the air inlet (4) is smaller than the inner diameter of the other end of the conversion cylinder.

7. A front-stage catalyst assembly according to claim 6, characterized in that: The dispersion hole (9) is in the shape of a truncated cone structure, and the size of one end of the dispersion hole (9) facing the air inlet (4) is smaller than the size of the other end of the dispersion hole (9).

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