Gas rectifier and engine aftertreatment device
By using wave-shaped diversion components and air outlet design in the diesel engine exhaust treatment device, the problems of uneven gas flow and low sensor monitoring accuracy are solved, and effective control of exhaust emissions is achieved.
Patent Information
- Application Number
- CN202421878742.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-05
AI Technical Summary
The gas flow of diesel engines is uneven under complex operating conditions, resulting in low sensor monitoring accuracy, which in turn leads to excessive exhaust emissions.
A gas rectifier is designed, using a flow guide assembly composed of two arc-shaped plates with opposite opening directions to form a wavy structure, and an air outlet hole is opened on the plate, which converts the laminar flow into a turbulent flow and disrupts the gas flow through the air outlet holes to achieve uniform gas mixing.
It improves the uniformity of gas flow, improves sensor monitoring accuracy, and reduces the occurrence of exhaust emissions exceeding the standard.
Smart Images
Figure CN223120000U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine aftertreatment, and particularly relates to a gas rectifier and an engine aftertreatment device. Background Art
[0002] As an important power device, diesel engines are widely used in fields such as automobiles, industrial equipment, and ships. Due to differences in their combustion methods and fuel characteristics, the exhaust emissions of diesel engines often contain a large amount of harmful substances such as particulate matter and nitrogen oxides, which pose hazards to the environment and human health. To address this issue, industry regulations require diesel engines to be equipped with exhaust gas treatment devices during use to reduce exhaust emissions. These exhaust gas treatment devices can effectively convert particulate matter and nitrogen oxides into harmless substances, thereby reducing their hazards to the environment and human health.
[0003] To solve this problem, most current engines use SCR (Selective Catalytic Reduction) technology for selective catalytic reduction. SCR technology is a technique that uses ammonia and NOx to undergo a catalytic reduction reaction to eliminate nitrogen oxides in diesel engine exhaust. However, in actual use, due to different operating conditions of the engine, when the engine is in complex operating conditions, there are problems such as poor gas flow uniformity and dead zones in the gas flow, which further lead to low monitoring accuracy of sensors, resulting in excessive exhaust emissions and affecting the normal driving and use of the engine. Summary of the Utility Model
[0004] Embodiments of the utility model disclose a gas rectifier and an engine aftertreatment device, which are used to solve the problems of uneven gas flow and low sensor monitoring accuracy under complex working conditions, and further reduce the occurrence of excessive exhaust emissions.
[0005] To achieve the above object, the embodiments of the utility model provide the following technical solutions:
[0006] In a first aspect, the utility model provides a gas rectifier, comprising: a housing body and at least one flow guiding component;
[0007] An accommodation space is formed inside the housing body, and at least one flow guiding component is arranged inside the accommodation space;
[0008] Each of the flow guiding components includes a first arc-shaped plate and a second arc-shaped plate, the first arc-shaped plate and the second arc-shaped plate are sequentially connected along a first direction, the first direction is parallel to the axial direction of the housing body, and a plurality of air outlet holes are formed in both the first arc-shaped plate and the second arc-shaped plate;
[0009] The opening directions of the first arc-shaped plate and the second arc-shaped plate are opposite to each other.
[0010] In this application, a gas rectifier with at least one flow guiding component is provided. The flow guiding component is composed of a first arc-shaped plate and a second arc-shaped plate with opposite opening directions. That is, the first arc-shaped plate and the second arc-shaped plate form a wavy structure. After the gas passes through the wavy structure formed by the first arc-shaped plate and the second arc-shaped plate, the laminar flow gas will be transformed into turbulent flow. On this basis, a plurality of air outlet holes are also provided on the first arc-shaped plate and the second arc-shaped plate. After the gas becomes turbulent flow, it will be disrupted again by the plurality of air outlet holes, realizing the longitudinal gas mixing. During the whole above process, this application can change the flow law of the incoming gas, make the incoming air flow more evenly, reduce the occurrence of low sensor monitoring accuracy, and further reduce the occurrence of excessive tail gas emissions.
[0011] In some embodiments, the gas rectifier further includes a fixing rod, and the flow guiding component is arranged on the housing body through the fixing rod.
[0012] In some embodiments, there are a plurality of the flow guiding components. The plurality of flow guiding components are arranged on the housing body through the fixing rod, and the plurality of flow guiding components are arranged at intervals along a second direction on the fixing rod, and the second direction is the extending direction of the fixing rod.
[0013] In some embodiments, there are a plurality of the fixing rods, and every two adjacent fixing rods are arranged at intervals along a third direction, and the third direction is perpendicular to the first direction.
[0014] In some embodiments, the axis of any one of the air outlet holes is perpendicular to the first direction.
[0015] In some embodiments, the housing body is a circular ring structure.
[0016] In some embodiments, the fixing rod and the housing body are of an integral structure.
[0017] In some embodiments, the opening radian of the first arc-shaped plate is the same as that of the second arc-shaped plate.
[0018] In some embodiments, the first arc-shaped plate and the second arc-shaped plate are of an integral structure.
[0019] In a second aspect, the present utility model provides an engine after-treatment device, including the gas rectifier as described in any one of the above and a post-treatment device. The gas rectifier is arranged at the intake end of the post-treatment device. Description of the Drawings
[0020] Figure 1Schematic diagram of the intake end of the overall structure of the present utility model;
[0021] Figure 2 Schematic diagram of the outlet end of the overall structure of the present utility model;
[0022] Figure 3 Schematic three-dimensional structure diagram of the flow guiding component of the present utility model;
[0023] Figure 4 Schematic plan structure diagram of the flow guiding component of the present utility model.
[0024] In the figure: 1 - housing body, 2 - fixing rod, 3 - first arc plate, 4 - second arc plate, 5 - air outlet hole. Specific implementation manners
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model. Among them, in the description of the embodiments of the present application, unless otherwise stated, " / " means "or", for example, A / B may mean A or B; "and / or" in the text is only a description of the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.
[0026] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise stated, the meaning of "a plurality" is two or more than two.
[0027] The embodiments of the present utility model disclose a gas rectifier and an engine after-treatment device, which are used to solve the problems of uneven gas flow and low sensor monitoring accuracy under complex working conditions, and further reduce the occurrence of excessive exhaust gas emissions.
[0028] To achieve the above object, the embodiments of the present utility model provide the following technical solutions:
[0029] Please refer to Figures 1 - 4 , in the first aspect, the present utility model provides a gas rectifier, including: a housing body 1 and at least one flow guiding component;
[0030] An accommodation space is formed inside the housing body 1, and at least one flow guiding component is arranged inside the accommodation space;
[0031] Each of the flow guiding components includes a first arc-shaped plate 3 and a second arc-shaped plate 4. The first arc-shaped plate 3 and the second arc-shaped plate 4 are sequentially connected along a first direction, the first direction is parallel to the axial direction of the housing body 1, and a plurality of air outlet holes 5 are formed on both the first arc-shaped plate 3 and the second arc-shaped plate 4;
[0032] The opening directions of the first arc-shaped plate 3 and the second arc-shaped plate 4 are opposite.
[0033] In this application, by providing a gas rectifier with at least one flow guiding component, and the flow guiding component is composed of a first arc-shaped plate 3 and a second arc-shaped plate 4 with opposite opening directions, that is, the first arc-shaped plate 3 and the second arc-shaped plate 4 form a wavy structure. After the gas passes through the wavy structure formed by the first arc-shaped plate 3 and the second arc-shaped plate 4, the laminar flow gas will be transformed into turbulent flow. On this basis, a plurality of air outlet holes 5 are further formed on the first arc-shaped plate 3 and the second arc-shaped plate 4. After the gas becomes turbulent flow, it will be disrupted again by the plurality of air outlet holes 5, realizing the gas mixing in the longitudinal direction. During the whole above process, this application can change the flow law of the incoming gas, make the incoming air flow more evenly, reduce the occurrence of the phenomenon of low sensor monitoring accuracy, and further reduce the occurrence of the phenomenon of excessive tail gas emissions.
[0034] In one embodiment, please refer to Figure 1 、 Figure 2 , the gas rectifier further includes a fixing rod 2, and the flow guiding component is arranged on the housing body 1 through the fixing rod 2. In the above structure, the fixing rod 2 plays a role in fixing the flow guiding component. When this application is in use, the fixing rod 2 can ensure that the flow guiding component will not be interfered by the air flow and separated from the housing body 1, improving the stability of the flow guiding component.
[0035] In one embodiment, please refer to Figure 1 、 Figure 2 , there are a plurality of flow guiding components, and the plurality of flow guiding components are arranged on the housing body 1 through the fixing rod 2, and the plurality of flow guiding components are arranged at intervals along a second direction on the fixing rod 2, and the second direction is the extending direction of the fixing rod 2. The flow guiding components in this application can be multiple. When there are multiple flow guiding components, they will be arranged at intervals along the extending direction of the fixing rod 2. The purpose of such a design can ensure that the gas has sufficient flow channels and further accelerate the change process from laminar flow air to turbulent flow air.
[0036] In one embodiment, please refer to Figure 1 、 Figure 2, The fixing rods 2 include multiple ones, and every two adjacent fixing rods 2 are arranged at intervals in the third direction, where the third direction is perpendicular to the first direction. In the above structure, the number of the fixing rods 2 in this application can be multiple, and this application does not make specific limitations on this either. And when there are multiple fixing rods 2, the multiple fixing rods 2 will be arranged on the housing body 1 at intervals in the third direction. The purpose of such a design is to ensure that the gas has sufficient flow channels, and at the same time further accelerate the change process from laminar air flow to turbulent air flow, effectively improving the uniformity of the air flow.
[0037] In one embodiment, please refer to Figure 1 , the housing body 1 is in a circular ring structure. In this application, the housing body 1 is set to a circular ring structure, mainly considering that the air ducts of engines are generally circular structures, and the circular ring-shaped housing body 1 can better adapt to the shape of the engine air ducts, improving the practicability of this application. In actual use of this application, the circular ring-shaped housing body 1 can be directly placed in the engine air ducts to further achieve the uniform flow of gas.
[0038] In one embodiment, please refer to Figure 3 、 Figure 4 , the axis of any air outlet 5 is perpendicular to the first direction. In order to increase the gas component exchange in the vertical direction in this application, two groups of ventilation holes are added to each wavy ribbon structure, which can achieve the gas mixing in the longitudinal direction.
[0039] In one embodiment, the fixing rod 2 and the housing body 1 are of an integral structure. In the above structure, in this application, the fixing rod 2 and the housing body 1 are set to an integral structure, which can effectively improve the connection stability between the fixing rod 2 and the housing body 1, and the connection method between the fixing rod 2 and the housing body 1 can be integral casting, welding and other methods, and this application does not make specific limitations on this either.
[0040] In one embodiment, please refer to Figure 3 、 Figure 4 , the opening radian of the first arc-shaped plate 3 is the same as that of the second arc-shaped plate 4. It should be noted that in this application, the opening radian of the first arc-shaped plate 3 and that of the second arc-shaped plate 4 may also be different, and this application does not make specific limitations on this either. But in the above structure, the opening radian of the first arc-shaped plate 3 and that of the second arc-shaped plate 4 in this application are the same, forming a wavy structure, so as to better divide the gas flow. In some embodiments, the first arc-shaped plate 3 and the second arc-shaped plate 4 are of an integral structure.
[0041] In a second aspect, the present utility model provides an engine after-treatment device, which includes a gas rectifier and an after-treatment device as described in any one of the above, and the gas rectifier is arranged at the intake end of the after-treatment device, thereby solving the problems of uneven gas flow and low sensor monitoring accuracy under complex working conditions, and further reducing the occurrence of excessive exhaust gas emissions.
[0042] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these changes and modifications.
Claims
1. A gas rectifier, characterized in that, Comprising: A housing body and at least one flow guiding component; An accommodation space is formed inside the housing body, and at least one of the flow guiding components is arranged inside the accommodation space; Each of the flow guiding components includes a first arc-shaped plate and a second arc-shaped plate, the first arc-shaped plate and the second arc-shaped plate are sequentially connected along a first direction, the first direction is parallel to the axis direction of the housing body, and a plurality of air outlet holes are formed on both the first arc-shaped plate and the second arc-shaped plate; The opening directions of the first arc-shaped plate and the second arc-shaped plate are opposite.
2. The gas rectifier according to claim 1, characterized in that, The gas rectifier further includes a fixing rod, and the flow guiding component is arranged on the housing body through the fixing rod.
3. The gas rectifier according to claim 2, characterized in that, There are a plurality of the flow guiding components, and the plurality of flow guiding components are arranged on the housing body through the fixing rod, and the plurality of flow guiding components are arranged at intervals along a second direction on the fixing rod, and the second direction is the extending direction of the fixing rod.
4. The gas rectifier according to claim 3, characterized in that, There are a plurality of the fixing rods, and every two adjacent fixing rods are arranged at intervals along a third direction, and the third direction is perpendicular to the first direction.
5. The gas rectifier according to claim 1, characterized in that, The axis of any one of the air outlet holes is perpendicular to the first direction.
6. The gas rectifier according to claim 1, characterized in that, The housing body is of an annular structure.
7. The gas rectifier according to claim 2, characterized in that, The fixing rod and the housing body are of an integral structure.
8. The gas rectifier according to claim 1, characterized in that, The opening radian of the first arc-shaped plate is the same as that of the second arc-shaped plate.
9. The gas rectifier according to claim 8, characterized in that, The first arc-shaped plate and the second arc-shaped plate are of an integral structure.
10. An engine aftertreatment device, characterized in that, Comprising the gas rectifier as described in any one of claims 1-9 above and a post-treatment device, and the gas rectifier is arranged at the air inlet end of the post-treatment device.