Waste gas diluting device using turbulent flow field

Abstract

The utility model discloses a waste gas dilution device using a turbulent flow field, and relates to the technical field of waste gas dilution. The waste gas dilution device using the turbulent flow field comprises a turbulent flow box and a filter box, the right side surface of the turbulent flow box is fixedly connected with a gas inlet pipeline, the gas inlet pipeline is communicated with the interior of the turbulent flow box, the upper side surface of the gas inlet pipeline is fixedly connected with a cold air injection pipe, and a transmission channel is formed in the gas inlet pipeline; the cold air injection pipe is communicated with the interior of the conveying channel, an air inlet hole is formed in the inner wall of the conveying channel and communicated with the interior of the air inlet pipeline, a through groove extending out of the surface of the rear side of the turbulent flow box is formed in the inner wall of the rear side of the turbulent flow box, and a mounting plate is arranged on the surface of the rear side of the turbulent flow box. When the engine waste gas is diluted, particulate matters in the waste gas can be ensured to be uniformly distributed through turbulent flow, and the temperature of the waste gas can be reduced through dilution and heat exchange, so that the subsequent filtering effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas dilution, in particular to a waste gas dilution device using a turbulent flow field. Background Art

[0002] During the operation of the engine, a certain amount of exhaust gas will be generated. These exhaust gases will have a serious impact on the environment. Therefore, it is necessary to test the engine emissions. During the engine emission testing process, according to the weighing method testing requirements, the exhaust gas needs to be passed through filter paper to collect particulate matter.

[0003] The optimal absorption temperature of filter paper is 47±5℃, and its absorption rate is over 95%. However, the exhaust gas temperature is usually between 200 and 300℃, and it needs to be effectively cooled. This utility model provides an exhaust gas dilution device using a turbulent flow field. By mixing with dilution air, the exhaust gas is cooled and diluted, ensuring that the temperature and particulate matter concentration of the sampled gas meet the requirements of professional regulations. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide an exhaust gas dilution device using a turbulent flow field, which can solve the problem that the high exhaust gas temperature affects the absorption rate of the filter paper.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an exhaust gas dilution device using a turbulent flow field, comprising a turbulence box and a filter box, the right side surface of the turbulence box is fixedly connected to an intake pipe, the intake pipe is communicated with the interior of the turbulence box, the upper side surface of the intake pipe is fixedly connected to a cold air injection pipe, a transmission channel is opened inside the intake pipe, the cold air injection pipe is communicated with the interior of the transmission channel, an air intake hole is opened on the inner wall of the transmission channel, the air intake hole is communicated with the interior of the intake pipe, a through groove extending from the rear side surface of the turbulence box is opened, a mounting plate is provided on the rear side surface of the turbulence box, a turbulent heat conduction plate is fixedly connected to the front side surface of the mounting plate, the turbulent heat conduction plate extends into the interior of the turbulence box through the through groove, the front side surface of the mounting plate is fixedly connected to a heat conduction plate, the heat conduction plate slides through the interior of the turbulence box, and a heat conduction component is provided on the mounting plate.

[0006] Preferably, the heat conduction component includes an annular heat sink, which is fixedly connected to the rear surface of the mounting plate. A sealing ring groove is provided on the rear surface of the turbulence box, and an annular protrusion is fixedly connected to the front surface of the mounting plate.

[0007] Preferably, the annular protrusion is adapted to the sealing ring groove, the outer surfaces of the turbulence box and the mounting plate are fixedly connected with mounting ears, fixing bolts are provided on the mounting ears, and the right side surface of the filter box is fixedly connected with a transmission pipeline.

[0008] Preferably, the transmission pipeline is communicated with the interior of the turbulence box and the filter box respectively, and a diverter plate is fixedly connected to the inner wall of the filter box.

[0009] Preferably, the right side surface of the diverter plate is configured to be conical, the right side surface of the diverter plate is provided with a second through groove extending from the left side surface thereof, and the bottom wall of the filter box is fixedly connected with a fixing sleeve.

[0010] Preferably, an insertion groove extending into the interior of the filter box is provided on the upper surface of the filter box, and a sealing plate is provided on the upper surface of the filter box.

[0011] Preferably, the lower surface of the sealing plate is fixedly connected to a connecting plate, the lower surface of the connecting plate extends into the interior of the filter box through the insertion groove, and the lower surface of the connecting plate is fixedly connected to a filter paper mounting frame.

[0012] Preferably, filter paper is arranged inside the filter paper mounting frame, a second sealing groove is opened on the upper surface of the filter box, and a second sealing plate adapted to the second sealing groove is fixedly connected to the lower surface of the sealing plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) The exhaust gas dilution device using a turbulent flow field utilizes the arc-shaped setting of the turbulent heat conduction plate to guide the mixed gas upward to collide with the inner wall of the turbulent box again, thereby forming turbulence, and utilizes the turbulent heat conduction plate and the heat conduction plate to exchange heat with the mixed gas, and discharges it through the heat conduction component to further reduce the temperature of the exhaust gas. Through the above structure, when diluting the engine exhaust gas, not only can the turbulence ensure the uniform distribution of particulate matter in the exhaust gas, but also the dilution and heat exchange can reduce the temperature of the exhaust gas, thereby improving the effect of subsequent filtration.

[0015] (2) The waste gas dilution device using a turbulent flow field can divert the mixed gas into small airflows by setting the diverter plate and the second through groove, and filter the mixed gas through the filter paper in the filter paper mounting frame. When the filter paper needs to be replaced after a long period of filtration, the filter paper mounting frame can be pulled out by the sealing plate and the connecting plate. At the same time, the sealing performance of the filter box can be improved with the help of the second sealing groove and the second sealing plate. Through the above structure, when filtering the mixed gas, the mixed gas can be diverted into multiple small airflows, reducing the flow rate while ensuring the uniformity of gas dispersion during filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic structural diagram of an exhaust gas dilution device using a turbulent flow field according to the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the utility model;

[0019] Figure 3 This is a schematic diagram of the separation of the mounting plate of the utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the filter box of the utility model;

[0021] Figure 5 This is a schematic diagram of the filter paper mounting frame of the utility model;

[0022] Figure 6 for Figure 2 Enlarged view of point A in the middle.

[0023] Figure markings: 1. turbulence box; 2. filter box; 3. air intake duct; 4. cold air injection pipe; 5. transmission channel; 6. air inlet hole; 7. through groove; 8. mounting plate; 9. turbulence heat conduction plate; 10. heat conduction plate; 11. annular heat dissipation plate; 12. sealing ring groove; 13. annular protrusion; 14. mounting ear; 15. fixing bolt; 16. transmission duct; 17. diverter plate; 18. second through groove; 19. fixing sleeve; 20. insertion groove; 21. sealing plate; 22. connecting plate; 23. filter paper mounting bracket; 24. second sealing groove; 25. second sealing plate. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] See also Figure 1-6The utility model provides a technical solution: an exhaust gas dilution device using a turbulent flow field, comprising a turbulent flow field, including a turbulent box 1 and a filter box 2. The right surface of the turbulent box 1 is fixedly connected to an intake pipe 3, and the intake pipe 3 is communicated with the interior of the turbulent box 1 on the upper surface of the intake pipe 3. A transmission channel 5 is opened in the intake pipe 3, and the cold air injection pipe 4 is communicated with the interior of the transmission channel 5. The inner wall of the transmission channel 5 is provided with an air intake hole 6, and the air intake hole 6 is communicated with the interior of the intake pipe 3. The rear inner wall of the turbulent box 1 is provided with a through groove 7 extending from its rear side surface. The rear surface of the turbulent box 1 is provided with a mounting plate 8, and the front surface of the mounting plate 8 is fixedly connected with a turbulent heat conducting plate 9, which extends into the interior of the turbulent box 1 through the through groove 7. The front surface of the mounting plate 8 is fixedly connected with a heat conducting plate 10, and the heat conducting plate 10 slides through the interior of the turbulent box 1, and a heat conducting component is provided on the mounting plate 8. When the engine exhaust gas is diluted and cooled for subsequent filtration, the engine exhaust gas is injected through the intake pipe 3, and at the same time, the cold air is injected into the transmission channel 5 through the cold air injection pipe 4 by using external equipment. Then the cold air enters the interior of the intake pipe 3 through the air inlet hole 6 and mixes with the engine exhaust gas. The laminar flow of the exhaust gas will be destroyed during the mixing process. The mixed gas enters the interior of the turbulence box 1 and collides with the turbulence heat conduction plate 9. The arc-shaped setting of the turbulence heat conduction plate 9 is used to guide the mixed gas upward and collide with the inner wall of the turbulence box 1 again, thereby forming turbulence, and the turbulence heat conduction plate 9 and the heat conduction plate 10 are used to exchange heat with the mixed gas, and the mixed gas is discharged through the heat conduction component to further reduce the temperature of the exhaust gas. Through the above structure, when the engine exhaust gas is diluted, not only can the turbulence ensure the uniform distribution of particulate matter in the exhaust gas, but the temperature of the exhaust gas can also be reduced by dilution and heat exchange, thereby improving the effect of subsequent filtration.

[0026] Furthermore, the heat conduction component includes an annular heat sink 11, which is fixedly connected to the rear surface of the mounting plate 8. A sealing ring groove 12 is provided on the rear surface of the turbulence box 1, and an annular protrusion 13 is fixedly connected to the front surface of the mounting plate 8. The annular protrusion 13 is adapted to the sealing ring groove 12. The outer surfaces of the turbulence box 1 and the mounting plate 8 are fixedly connected with mounting ears 14, and fixing bolts 15 are provided on the mounting ears 14. The right surface of the filter box 2 is fixedly connected with a transmission pipe 16, and the transmission pipe 16 is communicated with the interior of the turbulence box 1 and the filter box 2 respectively. The inner wall of the filter box 2 is fixedly connected with a diverter plate 17, and the right side of the diverter plate 17 is fixedly connected to the inner wall of the filter box 2. The side surface is set to be conical, and the right surface of the diverter plate 17 is provided with a second through groove 18 extending from its left surface. The bottom wall of the filter box 2 is fixedly connected with a fixing sleeve 19, and the upper surface of the filter box 2 is provided with an insertion groove 20 extending into the interior thereof. The upper surface of the filter box 2 is provided with a sealing plate 21, and the lower surface of the sealing plate 21 is fixedly connected with a connecting plate 22. The lower surface of the connecting plate 22 extends into the interior of the filter box 2 through the insertion groove 20. The lower surface of the connecting plate 22 is fixedly connected with a filter paper mounting bracket 23. The interior of the filter paper mounting bracket 23 is provided with filter paper. The upper surface of the filter box 2 is provided with a second sealing groove 24, which is sealed The lower surface of the plate 21 is fixedly connected with a second sealing plate 25 adapted to the second sealing groove 24. After the turbulent heat conducting plate 9 and the heat conducting plate 10 exchange heat with the exhaust gas, the heat is transferred to the annular heat dissipation plate 11 through the mounting plate 8, and the heat is conducted to the air by the annular heat dissipation plate 11. At the same time, the sealing ring groove 12 and the annular protrusion 13 are used to improve the sealing performance of the turbulence box 1 to avoid leakage of unfiltered exhaust gas. The mounting plate 8 can be separated from the turbulence box 1 by removing the fixing bolts 15, so as to maintain and clean the turbulent heat conducting plate 9 and the heat conducting plate 10. After the mixed gas is cooled and turbulently circulated, it passes through the heat conducting plate 11. The transmission pipe 16 enters the interior of the filter box 2, and the mixed gas is diverted into small airflows through the arrangement of the diverter plate 17 and the second through groove 18. The mixed gas is filtered by the filter paper in the filter paper mounting frame 23. When the filter paper needs to be replaced after a long period of filtration, the filter paper mounting frame 23 can be pulled out through the sealing plate 21 and the connecting plate 22. At the same time, the sealing performance of the filter box 2 can be improved with the help of the second sealing groove 24 and the second sealing plate 25. Through the above structure, when filtering the mixed gas, the mixed gas can be diverted into multiple small airflows, which can reduce the flow rate and ensure the uniformity of gas dispersion during filtration.

[0027] Working principle: When the engine exhaust gas is diluted and cooled for subsequent filtration, the engine exhaust gas is injected through the intake pipe 3, and at the same time, the cold air is injected into the transmission channel 5 through the cold air injection pipe 4 by using external equipment. Then the cold air enters the interior of the intake pipe 3 through the air inlet hole 6 and mixes with the engine exhaust gas. The laminar flow of the exhaust gas will be destroyed during the mixing process. The mixed gas enters the interior of the turbulence box 1 and collides with the turbulence heat conduction plate 9. The arc setting of the turbulence heat conduction plate 9 is used to guide the mixed gas to the top and collide with the inner wall of the turbulence box 1 again, thereby forming turbulence, and the turbulence heat conduction plate 9 and the heat conduction plate 10 are used to exchange heat with the mixed gas, and the mixed gas is discharged through the heat conduction component to further reduce the temperature of the exhaust gas. After the turbulence heat conduction plate 9 and the heat conduction plate 10 exchange heat with the exhaust gas, the heat is transferred to the annular heat sink 1 through the mounting plate 8. 1, and uses the annular heat sink 11 to conduct heat to the air, and at the same time, with the help of the sealing ring groove 12 and the annular protrusion 13, the sealing performance of the turbulence box 1 is improved to prevent the leakage of unfiltered exhaust gas, and the mounting plate 8 can be separated from the turbulence box 1 by removing the fixing bolts 15, so as to maintain and clean the turbulent heat conduction plate 9 and the heat conduction plate 10. After the cooling turbulence, the mixed gas enters the interior of the filter box 2 through the transmission pipe 16, and is divided into small air flows by the arrangement of the diverter plate 17 and the second through groove 18. The mixed gas is filtered by the filter paper in the filter paper mounting frame 23. When the filter paper needs to be replaced after a long period of filtration, the filter paper mounting frame 23 can be pulled out by the sealing plate 21 and the connecting plate 22. At the same time, the sealing performance of the filter box 2 can be improved with the help of the second sealing groove 24 and the second sealing plate 25.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An exhaust gas dilution device using a turbulent flow field, comprising a turbulence box (1) and a filter box (2), characterized in that: The right side surface of the turbulence box (1) is fixedly connected to an air intake pipe (3), the air intake pipe (3) is communicated with the interior of the turbulence box (1), the upper side surface of the air intake pipe (3) is fixedly connected to a cold air injection pipe (4), the interior of the air intake pipe (3) is provided with a transmission channel (5), the cold air injection pipe (4) is communicated with the interior of the transmission channel (5), the inner wall of the transmission channel (5) is provided with an air intake hole (6), the air intake hole (6) is communicated with the interior of the air intake pipe (3), and the turbulence box The rear inner wall of the turbulence box (1) is provided with a through groove (7) extending from the rear surface thereof, the rear surface of the turbulence box (1) is provided with a mounting plate (8), the front surface of the mounting plate (8) is fixedly connected with a turbulence heat conduction plate (9), the turbulence heat conduction plate (9) extends into the interior of the turbulence box (1) through the through groove (7), the front surface of the mounting plate (8) is fixedly connected with a heat conduction plate (10), the heat conduction plate (10) slides through the interior of the turbulence box (1), and a heat conduction component is provided on the mounting plate (8).

2. The exhaust gas dilution device using a turbulent flow field according to claim 1, characterized in that: The heat-conducting assembly comprises an annular heat dissipation plate (11), which is fixedly connected to the rear surface of the mounting plate (8); a sealing ring groove (12) is provided on the rear surface of the turbulence box (1); and an annular protrusion (13) is fixedly connected to the front surface of the mounting plate (8).

3. The exhaust gas dilution device using a turbulent flow field according to claim 2, characterized in that: The annular protrusion (13) is adapted to the sealing ring groove (12); the outer surfaces of the turbulence box (1) and the mounting plate (8) are fixedly connected with mounting ears (14); fixing bolts (15) are provided on the mounting ears (14); and the right side surface of the filter box (2) is fixedly connected with a transmission pipe (16).

4. The exhaust gas dilution device using a turbulent flow field according to claim 3, characterized in that: The transmission pipe (16) is communicated with the interior of the turbulence box (1) and the filter box (2) respectively, and a diverter plate (17) is fixedly connected to the inner wall of the filter box (2).

5. The exhaust gas dilution device using a turbulent flow field according to claim 4, characterized in that: The right side surface of the diverter plate (17) is configured to be conical, and the right side surface of the diverter plate (17) is provided with a second through groove (18) extending from the left side surface thereof, and the bottom wall of the filter box (2) is fixedly connected with a fixing sleeve (19).

6. The exhaust gas dilution device using a turbulent flow field according to claim 5, characterized in that: An insertion groove (20) extending into the interior of the filter box (2) is provided on the upper surface of the filter box (2), and a sealing plate (21) is provided on the upper surface of the filter box (2).

7. The exhaust gas dilution device using a turbulent flow field according to claim 6, characterized in that: The lower surface of the sealing plate (21) is fixedly connected to a connecting plate (22), the lower surface of the connecting plate (22) extends into the interior of the filter box (2) through the insertion groove (20), and the lower surface of the connecting plate (22) is fixedly connected to a filter paper mounting frame (23).

8. The exhaust gas dilution device using a turbulent flow field according to claim 7, characterized in that: Filter paper is arranged inside the filter paper mounting frame (23), a second sealing groove (24) is provided on the upper surface of the filter box (2), and a second sealing plate (25) adapted to the second sealing groove (24) is fixedly connected to the lower surface of the sealing plate (21).

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