Three-way catalyst shell with spiral guide plate

Abstract

The utility model relates to the technical field of automobile parts, in particular to a three-way catalyst shell with a spiral guide plate, which comprises a three-way catalyst shell body, a reaction chamber is arranged in the three-way catalyst shell body, an air inlet and an air outlet are arranged at two ends of the three-way catalyst shell body, and the air inlet and the air outlet are communicated with the reaction chamber. An air guide structure communicated with the air inlet is arranged in the three-way catalyst shell body and comprises a flow guide column, a spiral flow guide plate and an air distribution plate, the spiral flow guide plate and the air distribution plate are sequentially, coaxially and fixedly connected to the flow guide column in the air inlet direction, and the outer wall of the spiral flow guide plate and the outer wall of the air distribution plate are closely attached to the inner wall of the three-way catalyst shell body. And a plurality of flow guide grooves are formed in the gas distribution plate, so that the problems that the performance of a traditional three-way catalyst is improved by improving the content of precious metal, and the manufacturing cost is sharply increased due to the increase of the content of the precious metal are solved.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and specifically discloses a three-way catalytic converter housing with a spiral guide plate. Background Technology

[0002] The three-way catalytic converter is the most important external purification device installed in a car's exhaust system. It converts harmful gases emitted from vehicle exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions.

[0003] A three-way catalytic converter includes a catalytic converter housing and a catalyst carrier installed inside the housing. The housing has a reaction chamber for mounting the catalyst carrier, and an air inlet and an air outlet at both ends connecting to the reaction chamber. Vehicle exhaust gases are introduced through the air inlet, and the internal catalyst carrier processes the harmful gases.

[0004] In existing technologies, as the performance requirements for three-way catalytic converters gradually increase, the structure of the three-way catalytic converter is often improved, usually by increasing the content of precious metals in the catalyst support to improve the performance of the three-way catalytic converter. However, increasing the content of precious metals will drastically increase the cost.

[0005] This invention provides a three-way catalytic converter housing with a spiral guide plate to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of this invention is to solve the problem that traditional three-way catalytic converters improve performance by increasing the content of precious metals, but this increases manufacturing costs dramatically.

[0007] To achieve the above objectives, the basic solution of this utility model provides a three-way catalytic converter housing with a spiral guide plate, including a three-way catalytic converter housing body. The three-way catalytic converter housing body has a reaction chamber, and both ends have an air inlet and an air outlet communicating with the reaction chamber. The three-way catalytic converter housing body has a gas guiding structure communicating with the air inlet. The gas guiding structure includes a guide column, a spiral guide plate and a gas distribution plate coaxially fixed to the guide column along the air inlet direction. The outer walls of the spiral guide plate and the outer walls of the gas distribution plate are closely fitted with the inner wall of the three-way catalytic converter housing body, and the gas distribution plate has several guide grooves.

[0008] Furthermore, the guide groove is a closed guide ring groove that is opened circumferentially on the air distribution plate around the guide column, and the distance between the guide ring groove and the guide column increases from the inside to the outside.

[0009] Furthermore, the cross-sectional shape of the flow guide ring groove is an isosceles trapezoid, and the length of the base side of the isosceles trapezoid is greater than the length of the top side.

[0010] Furthermore, the bottom openings of adjacent flow guide ring grooves are arranged adjacent to each other.

[0011] Furthermore, the air distribution plate is also fixedly connected with several flow guide ring pipes that are respectively connected to the flow guide ring groove.

[0012] Furthermore, the top of the guide column extends into the air inlet, and a baffle plate for introducing airflow into the spiral guide plate is fixed between the guide column and the inner wall of the air inlet.

[0013] Furthermore, the guide column includes a top column and a bottom column. The diameter of the bottom column is larger than that of the top column, and the two ends of the bottom column are located on both sides of the air distribution plate. The bottom end of the bottom column has an upward-facing wind tunnel, and the bottom column above the air distribution plate has several wind slots circumferentially connected to the wind tunnel.

[0014] Furthermore, all the air ducts are inclined in the same direction, and the inclination direction is consistent with the airflow direction on the spiral guide plate.

[0015] Furthermore, a baffle inclined toward the air inlet is fixedly attached to the spiral guide plate.

[0016] The principle and effect of this solution are as follows:

[0017] 1. Compared with existing technologies, this utility model, by setting a spiral guide plate in front of the air distribution plate, ensures that the airflow passing through the guide groove still has a certain angle after being guided by the spiral guide plate. This allows for more complete contact between the vehicle exhaust gas and the catalyst carrier, and prolongs the contact time. This solves the problem that traditional three-way catalytic converters improve performance by increasing the precious metal content, but this increase in precious metal content drastically increases manufacturing costs.

[0018] 2. Compared with the prior art, the guide channel of this utility model is specifically a guide ring channel with an isosceles trapezoidal cross section. When the high-speed airflow passes through the guide ring channel with varying dimensions, the flow velocity will be slowed down and further homogenized. Through further homogenization, the contact between the vehicle exhaust gas and the catalyst carrier can be more complete. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a three-way catalytic converter housing with a spiral guide plate according to an embodiment of this application is shown;

[0021] Figure 2A schematic diagram of a three-way catalytic converter housing with a spiral guide plate according to an embodiment of this application is shown;

[0022] Figure 3 A schematic diagram of a three-way catalytic converter housing with a spiral guide plate according to an embodiment of this application is shown. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] The reference numerals in the accompanying drawings include: 1. Three-way catalytic converter housing body; 2. Top column; 3. Barrier plate; 4. Spiral guide plate; 5. Bottom column; 6. Baffle; 7. Air distribution plate; 8. Guide ring pipe; 9. Air duct.

[0025] A three-way catalytic converter housing with a spiral guide vane, for example... Figure 1 As shown:

[0026] The device includes a three-way catalytic converter housing body 1, which has a reaction chamber formed inside. At both ends, there are air inlets and air outlets that communicate with the reaction chamber. In this embodiment, the top end is the air inlet and the bottom end is the air outlet. The catalytic converter carrier is installed through the reaction chamber.

[0027] like Figure 2 and Figure 3 As shown, a gas guiding structure communicating with the air inlet is installed inside the three-way catalytic converter housing 1. The gas guiding structure includes a guide column, a spiral guide plate 4 and a gas distribution plate 7, which are coaxially fixedly installed on the guide column along the air intake direction. The outer walls of the spiral guide plate 4 and the gas distribution plate 7 are closely fitted to the inner wall of the three-way catalytic converter housing 1. The bottom end of the spiral guide plate 4 extends and connects to the gas distribution plate 7, and the gas distribution plate 7 has several guide grooves. A baffle 6 inclined towards the air inlet direction is fixedly installed on the spiral guide plate 4.

[0028] In this embodiment, the top and bottom surfaces of the air distribution plate 7 are both flat.

[0029] like Figure 2 and Figure 3 As shown, the air distribution plate 7 has three sets of guide grooves. The guide grooves are closed guide ring grooves that are opened around the guide column on the air distribution plate 7, and the distance between the guide ring groove and the guide column increases from the inside to the outside. The cross-sectional shape of the guide ring groove is an isosceles trapezoid, the length of the base of the isosceles trapezoid is greater than the length of the top side, and the bottom openings of adjacent guide ring grooves are arranged adjacent to each other.

[0030] In this embodiment, three sets of flow guide ring pipes 8 are also fixedly installed on the air distribution plate 7. The flow guide ring pipes 8 are aligned with the flow guide grooves and are connected to the aligned flow guide grooves.

[0031] The top of the guide column extends into the air intake, and a baffle plate 3 is fixedly installed between it and the inner wall of the air intake. Specifically, the baffle plate 3 is located at the end of the air intake. The baffle plate 3 reduces the area of ​​the air intake, and a guide hole is formed between it and the air intake to introduce the vehicle exhaust gas into the spiral guide plate 4.

[0032] like Figure 2 As shown, the guide column includes a top column 2 and a bottom column 5. The diameter of the bottom column 5 is larger than that of the top column 2, and the bottom column 5 penetrates the air distribution plate 7. The two ends of the bottom column 5 are located on both sides of the air distribution plate 7. The bottom column 5 also has a wind tunnel opening from the bottom end upwards, and several wind slots 9 connected to the wind tunnels are opened around the bottom column 5 above the air distribution plate 7. All wind slots 9 are inclined in the same direction, and the inclination direction is consistent with the airflow direction on the spiral guide plate 4.

[0033] When this utility model is used, the exhaust gas of the car enters the air intake and enters the spiral guide plate 4 through the guide hole. The spiral guide plate 4 changes the airflow direction and removes some substances such as tar when passing through the baffle 6.

[0034] Afterwards, the airflow enters above the air distribution plate 7, and part of the airflow will enter the wind tunnel from the wind trough 9 of the bottom column 5 and be discharged into the catalyst carrier behind for reaction. This part of the airflow is guided by the inclined wind trough 9 to have an inclined flow direction, which can slow down the flow rate.

[0035] Part of the airflow directly enters the catalyst carrier through the guide ring pipe 8 and the guide ring groove. When passing through the isosceles trapezoidal guide ring groove, the high-speed airflow will slow down and be further homogenized as it passes through the guide ring groove with its changing size. Furthermore, after being guided by the spiral guide plate 4, the airflow through the guide ring groove still has a certain angle of inclination. Through further homogenization and guidance by the spiral guide plate 4, the contact between the vehicle exhaust gas and the catalyst carrier can be more complete and the contact time can be extended.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A three-way catalyst housing with spiral guide vanes, comprising a three-way catalyst housing body, a reaction chamber is arranged in the three-way catalyst housing body, and an inlet and an outlet are arranged at two ends of the three-way catalyst housing body and communicate with the reaction chamber, characterized in that, The three-way catalyst housing body is internally provided with a gas guide structure communicated with the gas inlet, the gas guide structure comprises a flow guide column, a spiral flow guide plate and a gas distribution plate which are coaxially and fixedly connected on the flow guide column in sequence along the gas inlet direction, the outer wall of the spiral flow guide plate and the outer wall of the gas distribution plate are closely attached to the inner wall of the three-way catalyst housing body, and a plurality of flow guide grooves are formed on the gas distribution plate.

2. The helical finned three-way catalyst housing according to claim 1, characterized in that The flow guide grooves are closed flow guide ring grooves which are circumferentially formed on the gas distribution plate and surround the flow guide column, and the distance between the flow guide ring grooves and the flow guide column increases from inside to outside.

3. The helical finned three-way catalyst housing according to claim 2, wherein The cross-sectional shape of the flow guide ring groove is isosceles trapezoidal, and the length of the base of the isosceles trapezoid is greater than the length of the top.

4. The helical finned three-way catalyst housing according to claim 3, characterized in that The bottom openings of adjacent flow guide ring grooves are adjacently arranged.

5. The helical finned three-way catalyst housing of claim 3, wherein, A plurality of flow guide ring pipes which are communicated with the flow guide ring grooves are fixedly connected on the gas distribution plate.

6. The helical finned three-way catalyst housing of claim 1, wherein, The top end of the flow guide column extends into the gas inlet, and a blocking plate for guiding the gas flow into the spiral flow guide plate is fixedly connected between the top end of the flow guide column and the inner wall of the gas inlet.

7. The helical finned three-way catalyst housing of claim 6, wherein The flow guide column comprises a top column and a bottom column, the diameter of the bottom column is greater than the diameter of the top column, and the two ends of the bottom column are located on the two sides of the gas distribution plate, respectively, a wind tunnel is formed on the bottom end of the bottom column, a plurality of wind grooves which are communicated with the wind tunnel are circumferentially formed on the bottom column above the gas distribution plate.

8. The helical finned three-way catalyst housing of claim 7, wherein, The wind grooves are all inclined towards the same direction, and the inclination direction is consistent with the gas flow direction on the spiral flow guide plate.

9. The helical finned three-way catalyst converter housing of claim 1, wherein, A baffle plate which is inclined towards the gas inlet direction is fixedly connected on the spiral flow guide plate.

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