EGR (Exhaust Gas Recirculation) metal pipe

Abstract

The utility model relates to an EGR metal pipe which comprises a first pipe body and is characterized in that the two ends of the first pipe body are higher than the middle of the first pipe body, the middle of the first pipe body is connected with a collecting pipe, the axis of the collecting pipe intersects with the axis of the first pipe body, and the end, away from the first pipe body, of the collecting pipe is in threaded connection with an end cover; a containing groove is formed in the end face, located in the collecting pipe, of the end cover and located in the collecting pipe. Condensate water can be prevented from being accumulated in the EGR pipe.

Description

Technical Field

[0001] This utility model relates to the field of exhaust pipes, and in particular to an EGR metal pipe. Background Technology

[0002] With the implementation of the China VI emission standard for automobiles, the China VI regulations reduce the nitrogen oxide content in exhaust gases to about 20% of that in China V. Therefore, how to reduce nitrogen oxides in engines has become a new problem for OEMs developing vehicles that meet the China VI standard.

[0003] The current mainstream approach is to use EGR technology to reduce nitrogen oxide levels. This is achieved by installing an exhaust gas recirculation device on the engine exhaust pipe, which controls the exhaust gas throttle valve according to the instructions of the ECU engine computer, splitting the engine exhaust gas into two paths; one path enters the EGR and returns to the engine to participate in combustion again.

[0004] Since EGR gas is introduced into the engine's intake manifold from the engine's exhaust pipe through the EGR pipe, the gas entering the EGR pipe from the engine will cool down rapidly, resulting in condensation in the EGR pipe. If there is no suitable drainage path, the accumulation of condensation will affect the flow capacity of the EGR pipe. Utility Model Content

[0005] This application provides an EGR metal pipe that can prevent condensate from accumulating inside the EGR pipe.

[0006] The EGR metal tube provided in this application adopts the following technical solution:

[0007] An EGR metal tube includes a first tube body, characterized in that: both ends of the first tube body are higher than the middle part of the first tube body, a collection tube is connected to the middle part of the first tube body, the axis of the collection tube intersects the axis of the first tube body, an end cap is threadedly connected to the end of the collection tube away from the first tube body, and a receiving groove is formed on the end face of the end cap located inside the collection tube, the receiving groove being located inside the collection tube.

[0008] By adopting the above technical solution, the condensate in the first pipe will automatically flow into the collection pipe due to gravity and be uniformly collected into the receiving tank. To drain the condensate, simply unscrew the end cap from the collection pipe.

[0009] Preferably, the first tube is provided with a capture plate, one end of which extends out of the first tube and the other end of which extends into the collection tube, and the capture plate is provided with multiple perforations.

[0010] By adopting the above technical solution, the water in the exhaust gas will liquefy upon contact with the capture plate and remain on the capture plate. It will then drip down the capture plate into the receiving cavity for unified collection. Simultaneously, the capture plate will guide the exhaust gas into the collection pipe, increasing the exhaust gas's travel distance and allowing for better collection of the liquefied water within the exhaust gas.

[0011] Preferably, the outer wall of the collecting tube is provided with multiple first heat dissipation fins, and the multiple first heat dissipation fins are equidistantly distributed along the length direction of the collecting tube.

[0012] By adopting the above technical solution, the heat dissipation of the collection pipe is improved, making it easier for water in the exhaust gas to be liquefied and collected inside the collection pipe, thereby improving the water collection efficiency in the exhaust gas.

[0013] Preferably, the first tube body is provided with multiple reinforcing ribs, which are distributed around the periphery of the end of the capture plate extending out of the first tube body. All of the multiple reinforcing ribs are used to connect the first tube body and the end of the capture plate extending out of the first tube body.

[0014] By adopting the above technical solution, multiple reinforcing ribs are added to improve the connection strength between the capture plate and the first pipe body. Simultaneously, these reinforcing ribs improve the heat dissipation performance of the capture plate, thereby enhancing its liquefaction efficiency for water in the waste gas.

[0015] Preferably, the collecting pipe is provided with a first baffle plate, which is located on the side of the end cap near the first pipe body. The first baffle plate is inclined, and a channel is formed between the end of the first baffle plate near the end cap and the inner wall of the collecting pipe. The channel allows condensate to flow into the receiving tank.

[0016] By adopting the above technical solution, the impact of exhaust gas flow on the water in the containment cavity is reduced, and water splashing caused by exhaust gas is prevented.

[0017] Preferably, a second baffle is provided inside the collection pipe. One end of the second baffle is connected to the collection pipe, and the other end of the second baffle passes through the channel. The distance from the end of the second baffle connected to the collection pipe to the end cap is greater than the distance from the end of the second baffle passing through the channel to the end cap.

[0018] By adopting the above technical solution, the flow of exhaust gas is guided, allowing the exhaust gas to directly enter the first pipe. When a car is moving, it will bump around, causing water in the receiving tank to splash. The second baffle prevents water from splashing out of the channel.

[0019] Preferably, a capture net is provided on one end of the capture plate that extends into the collection pipe. The capture net is woven from polyethylene plastic threads and hangs down on the first windbreak plate.

[0020] By adopting the above technical solution, the capture net can better capture water in the exhaust gas.

[0021] Preferably, both ends of the first tube are laser-welded with connecting joints, and both connecting joints are provided with mating holes.

[0022] By adopting the above technical solution, the connection between the first tube and the engine can be facilitated.

[0023] The main technical effects of this utility model are reflected in the following aspects:

[0024] 1. In this utility model, the condensate in the first tube will automatically flow into the collection tube due to gravity and be uniformly collected into the receiving tank, thus preventing the condensate from accumulating in the first tube.

[0025] 2. To drain condensate, simply unscrew the end cap from the collection pipe.

[0026] 3. This utility model reduces the residue of condensate in the first pipe by capturing condensate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an EGR metal tube.

[0028] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0029] Figure 3 yes Figure 1 A partial cross-sectional view of the EGR metal tube along line BB.

[0030] Reference numerals: 1. First tube body; 11. Reinforcing rib; 2. Collection tube; 21. First heat dissipation fin; 3. End cap; 31. Receiving groove; 4. Capturing plate; 41. Perforation; 5. First baffle plate; 6. Channel; 7. Second baffle plate; 8. Capturing net; 9. Connecting joint; 91. Mating hole. Detailed Implementation

[0031] The present application will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present application can be more easily understood and mastered.

[0032] Reference Figure 1 This embodiment of an EGR metal tube includes a first tube body 1, with both ends of the first tube body 1 higher than its middle portion, and a collection tube 2 connected to the middle portion of the first tube body 1. Connecting joints 9 are laser-welded to both ends of the first tube body 1, and each connecting joint 9 has a mating hole 91.

[0033] Reference Figure 1 and Figure 2The axis of the collecting pipe 2 intersects the axis of the first pipe body 1. An end cap 3 is threaded onto the end of the collecting pipe 2 away from the first pipe body 1. A receiving groove 31 is formed on the end face of the end cap 3 inside the collecting pipe 2. The receiving groove 31 is located inside the collecting pipe 2. Multiple first heat dissipation fins 21 are provided on the outer wall of the collecting pipe 2. The multiple first heat dissipation fins 21 are equidistantly distributed along the length direction of the collecting pipe 2.

[0034] Reference Figures 1-3 A capture plate 4 is fixed inside the first tube body 1. One end of the capture plate 4 extends out of the first tube body 1, and the other end of the capture plate 4 extends into the collection tube 2. The capture plate 4 has multiple perforations 41. Multiple reinforcing ribs 11 are formed on the first tube body 1. The multiple reinforcing ribs 11 are distributed around the periphery of the end of the capture plate 4 that extends out of the first tube body 1. The multiple reinforcing ribs 11 are used to connect the first tube body 1 and the end of the capture plate 4 that extends out of the first tube body 1.

[0035] Reference Figure 1 and Figure 3 A first baffle plate 5 is integrally formed inside the collection pipe 2, located on the side of the end cap 3 near the first pipe body 1. The first baffle plate 5 is inclined, and a channel 6 is formed between the end of the first baffle plate 5 near the end cap 3 and the inner wall of the collection pipe 2, allowing condensate to flow into the receiving tank 31. A capture net 8 is provided on the end of the capture plate 4 that extends into the collection pipe 2. The capture net 8 is woven from polyethylene plastic threads and hangs down on the first baffle plate 5.

[0036] Reference Figure 1 and Figure 3 A second baffle plate 7 is integrally formed inside the collection pipe 2. One end of the second baffle plate 7 is connected to the collection pipe 2, and the other end of the second baffle plate 7 passes through the channel 6. The distance from the end of the second baffle plate 7 connected to the collection pipe 2 to the end cover 3 is greater than the distance from the end of the second baffle plate 7 passing through the channel 6 to the end cover 3.

[0037] Reference Figure 1 and Figure 3 When the water in the exhaust gas comes into contact with the capture plate 4, the collection pipe 2, and the capture net 8, it will liquefy upon contact with the cold air and then drip down the capture plate 4 and the capture net 8 onto the first baffle plate 5. Similarly, the water in the first pipe 1 will also collect on the first baffle plate 5 due to gravity. The water collected on the first baffle plate 5 will flow through the channel 6 into the second baffle plate 7, and then the second baffle plate 7 will guide the water into the receiving tank 31.

[0038] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. An EGR metal tube, comprising a first tube body (1), characterized in that: The two ends of the first tube (1) are higher than the middle part of the first tube (1). A collection tube (2) is connected to the middle part of the first tube (1). The axis of the collection tube (2) intersects the axis of the first tube (1). An end cap (3) is threadedly connected to the end of the collection tube (2) away from the first tube (1). A receiving groove (31) is opened on the end face of the end cap (3) inside the collection tube (2). The receiving groove (31) is located inside the collection tube (2).

2. The EGR metal tube according to claim 1, characterized in that: The first tube (1) is provided with a capture plate (4), one end of the capture plate (4) extends out of the first tube (1), and the other end of the capture plate (4) extends into the collection tube (2). The capture plate (4) is provided with multiple perforations (41).

3. An EGR metal tube according to claim 2, characterized in that: The outer wall of the collecting tube (2) is provided with multiple first heat dissipation fins (21), which are equidistantly distributed along the length of the collecting tube (2).

4. An EGR metal tube according to claim 2, characterized in that: The first tube (1) is provided with multiple reinforcing ribs (11), which are distributed around the end of the capture plate (4) extending out of the first tube (1). All the reinforcing ribs (11) are used to connect the first tube (1) and the end of the capture plate (4) extending out of the first tube (1).

5. An EGR metal tube according to claim 2, characterized in that: The collecting pipe (2) is provided with a first baffle plate (5). The first baffle plate (5) is located on the side of the end cap (3) close to the first pipe body (1). The first baffle plate (5) is inclined. The end of the first baffle plate (5) close to the end cap (3) forms a channel (6) with the inner wall of the collecting pipe (2). The channel (6) allows condensate to flow into the receiving tank (31).

6. An EGR metal tube according to claim 5, characterized in that: The collecting pipe (2) is provided with a second baffle plate (7). One end of the second baffle plate (7) is connected to the collecting pipe (2), and the other end of the second baffle plate (7) passes through the channel (6). The distance from the end of the second baffle plate (7) connected to the collecting pipe (2) to the end cap (3) is greater than the distance from the end of the second baffle plate (7) passing through the channel (6) to the end cap (3).

7. An EGR metal tube according to claim 5, characterized in that: The capture plate (4) is provided with a capture net (8) at one end of the end that extends into the collection pipe (2). The capture net (8) is woven from polyethylene plastic filaments and hangs down on the first windbreak plate (5).

8. An EGR metal tube according to claim 1, characterized in that: Both ends of the first tube (1) are laser-welded with connecting joints (9), and both connecting joints (9) are provided with mating holes (91).

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