Tail gas recirculation cooler shell of natural gas heavy truck engine

Abstract

The utility model provides a natural gas heavy truck engine tail gas recirculation cooler shell which comprises a cooling shell and a gas return shell, a partition plate is arranged in the cooling shell and divides the interior of the cooling shell into a first cavity and a second cavity, the cooling shell is externally connected with a gas inlet pipe, a connecting pipe, a gas outlet pipe and a gas return pipe, the gas inlet pipe is communicated with the first cavity, and the gas return pipe is communicated with the second cavity. The connecting pipe is connected with the first cavity and the air return shell, the air return pipe is connected with the second cavity and the air return shell, one end of the air outlet pipe is connected with the second cavity, and the other end of the air outlet pipe penetrates through the air return shell and penetrates out of the other side of the air return shell. The cooling shell is divided into the upper layer and the lower layer, tail gas to be cooled sequentially passes through the first cavity and the second cavity, the cooling fins taking away heat penetrate through the upper layer and the lower layer at the same time, the tail gas is cooled when passing through the first cavity and the second cavity, and the circulating cooling effect is achieved; the air return device is achieved through the air return shell and the air outlet pipe penetrating through the air return shell, the structure is simple, and the layout requirement for the whole vehicle is lowered.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field, concretely is a natural gas heavy truck engine tail gas recirculation cooler casing. BACKGROUND

[0002] With the gradual improvement of emission standards, post-processing needs to be carried out before the tail gas is discharged into the atmosphere to reduce the content of pollutants finally discharged into the atmosphere. The tail gas temperature is relatively high, and usually needs to be cooled before being discharged.

[0003] In order to make the cooling effect good, the circulation cooling is often set, but the circulation cooling leads to the cooling device pipe being too long and complex, the whole vehicle chassis needs to be changed, the layout requirement is higher, which leads to the cost greatly increasing.

[0004] In order to solve the above problems, the case is born. UTILITY MODEL CONTENT

[0005] (I) technical problem solved

[0006] The utility model discloses a natural gas heavy truck engine tail gas recirculation cooler casing to solve the problems in the background art.

[0007] (II) technical scheme

[0008] In order to achieve the above object, the utility model discloses a natural gas heavy truck engine tail gas recirculation cooler casing, which comprises a cooling casing and a back gas casing, a partition is arranged in the cooling casing, the partition divides the cooling casing into cavity one and cavity two, an air inlet pipe, a connecting pipe, an air outlet pipe and a back gas pipe are connected to the cooling casing, the air inlet pipe is communicated with cavity one, the connecting pipe connects cavity one and the back gas casing, the back gas pipe connects cavity two and the back gas casing, one end of the air outlet pipe is connected with cavity two, and the other end penetrates through the back gas casing and is led out from the other side of the back gas casing.

[0009] Preferably, a liquid outlet tank is fixed on the upper top surface in the cavity one, a liquid inlet tank is fixed on the bottom surface in the cavity two, cooling fins are connected between the liquid outlet tank and the liquid inlet tank, the cooling fins penetrate through the partition, and the inside of the cooling fins is communicated with the liquid outlet tank and the liquid inlet tank.

[0010] Preferably, a cooling mechanism is arranged on one side of the cooling casing, and the cooling mechanism is connected with the liquid outlet tank and the liquid inlet tank.

[0011] Preferably, heat dissipation fins are connected to the outer side of the connecting pipe, the back gas pipe and part of the air outlet pipe.

[0012] Preferably, a heat insulation layer is arranged outside the part of the air outlet pipe penetrating through the back gas casing.

[0013] (III) beneficial effects

[0014] Compared with the prior art, the natural gas heavy truck engine tail gas recirculation cooler shell has the following advantages: the natural gas heavy truck engine tail gas recirculation cooler shell divides the cooling shell body into two layers, the tail gas to be cooled passes through cavity one and cavity two in sequence, the cooling fins taking away heat pass through the two layers at the same time, the tail gas is cooled when passing through cavity one and cavity two, and the effect of circulating cooling is achieved, and the cooler pipe is not bent, and the effect is achieved through the gas return shell body and the gas outlet pipe passing through the gas return shell body, so that the layout requirement for the whole vehicle is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is an internal schematic view of the utility model;

[0016] In the figure: 1 cooling shell body, 11 cavity one, 12 cavity two, 2 gas return shell body, 3 partition plate, 4 gas inlet pipe, 5 connecting pipe, 6 gas outlet pipe, 7 gas return pipe, 8 liquid outlet tank, 9 liquid inlet tank, 10 cooling fin, 13 cooling mechanism, 14 heat dissipation fin, 15 heat insulation layer. DETAILED DESCRIPTION

[0017] The utility model will be further described in detail through the drawings and examples.

[0018] The utility model embodiment provides a kind of natural gas heavy truck engine tail gas recirculation cooler shell, as shown in Figure 1 As shown, including cooling shell body 1 and gas return shell body 2, cooling shell body 1 is equipped with partition plate 3, and partition plate 3 divides into cavity one 11, cavity two 12 in cooling shell body 1, and cooling shell body 1 is connected with gas inlet pipe 4, connecting pipe 5, gas outlet pipe 6 and gas return pipe 7, gas inlet pipe 4 is communicated with cavity one 11, connecting pipe 5 connects cavity one 11 and gas return shell body 2, gas return pipe 7 connects cavity two 12 and gas return shell body 2, and one end of gas outlet pipe 6 is connected with cavity two 12, and the other end passes through gas return shell body 2 and is worn from the other side of gas return shell body 2.

[0019] The tail gas to be cooled enters cavity one 11 from gas inlet pipe 4, then enters gas return shell body 2 through connecting pipe 5, then returns to cavity two 12 through gas return pipe 7, and finally is discharged through gas outlet pipe 7, and it needs to be noted that the part of gas outlet pipe 6 passing through gas return shell body 2 is equipped with heat insulation layer 15 outside, so that the tail gas with higher temperature in gas return shell body 2 reduces the heat transfer to the tail gas with lower temperature in gas outlet pipe 7.

[0020] Reference is made to the accompanying Figure 1, the upper top surface of the cavity one 11 is fixed with a liquid outlet tank 8, the bottom surface of the cavity two 12 is fixed with a liquid inlet tank 9, the liquid outlet tank 8 and the liquid inlet tank 9 are connected with cooling fins 10, the cooling fins 10 pass through the partition plate 3, the inside of the cooling fins 10 is communicated with the liquid outlet tank 8 and the liquid inlet tank 9, cooling liquid flows into the cooling fins from the liquid inlet tank 9, and then flows out from the liquid outlet tank 8, in the process, the cooling fins 10 take away the heat of the tail gas in the cavity one 11 and the cavity two 12. It should be noted that the cooling liquid takes away the heat in the cavity two 12 first, because the tail gas in the cavity two 12 is not recycled and cooled, and is subjected to the final cooling, the temperature of the cooling liquid is the lowest at this time, and the cooling effect is the best, then the cooling liquid absorbs the heat in the cavity two 12 and then cools the cavity one 11, the tail gas in the cavity one 11 is just discharged, and the temperature is very high, so the temperature of the cooling liquid is still lower than the temperature of the tail gas in the cavity one 11, and the cooling liquid continues to absorb the heat in the cavity one 11.

[0021] One side of the cooling shell 1 is provided with a cooling mechanism 13, the cooling mechanism 13 is connected with the liquid outlet tank 8 and the liquid inlet tank 9, the cooling mechanism 13 cools the cooling liquid, which is the prior art, and will not be repeated here.

[0022] Reference is made to the accompanying drawings Figure 1 The connecting pipe 5, the gas return pipe 7 and part of the gas outlet pipe 6 are connected with heat dissipation fins 14, the heat dissipation fins 14 can further absorb the heat of the tail gas in the pipe and dissipate to the air, that is, the tail gas is triple-cooled by the cavity one 11, the cavity two 12 and the heat dissipation fins, and the cooling effect is good.

[0023] The natural gas heavy truck engine tail gas recirculation cooler shell divides the cooling shell 1 into two layers, the tail gas to be cooled passes through the cavity one 11 and the cavity two 12 in turn, the cooling fins 10 taking away the heat pass through the two layers at the same time, the tail gas is cooled when passing through the cavity one 11 and the cavity two 12, the effect of circulating cooling is completed, and the cooler pipe is not arranged to bend and wind, and is realized by the gas return shell 2 and the gas outlet pipe 7 passing through the gas return shell, so that the structure is simple, and the layout requirement of the whole vehicle is reduced.

[0024] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and deformations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A natural gas heavy truck engine exhaust gas recirculation cooler housing, characterized by: The invention comprises a cooling shell (1) and an air return shell (2), wherein a partition (3) is provided inside the cooling shell (1), and the partition (3) divides the cooling shell (1) into a first cavity (11) and a second cavity (12). The cooling shell (1) is externally connected with an air inlet pipe (4), a connecting pipe (5), an air outlet pipe (6) and an air return pipe (7), wherein the air inlet pipe (4) is communicated with the first cavity (11), the connecting pipe (5) connects the first cavity (11) and the air return shell (2), the air return pipe (7) connects the second cavity (12) and the air return shell (2), and one end of the air outlet pipe (6) is connected to the second cavity (12), and the other end passes through the air return shell (2) and exits from the other side of the air return shell (2).

2. The exhaust gas recirculation cooler housing of a natural gas heavy truck engine according to claim 1, characterized in that: A liquid outlet box (8) is fixedly provided on the upper surface of the cavity one (11), and a liquid inlet box (9) is fixedly provided on the inner bottom surface of the cavity two (12). A cooling fin (10) is connected between the liquid outlet box (8) and the liquid inlet box (9). The cooling fin (10) passes through the partition (3), and the interior of the cooling fin (10) is communicated with the liquid outlet box (8) and the liquid inlet box (9).

3. The exhaust gas recirculation cooler housing of a natural gas heavy truck engine according to claim 2, characterized in that: A cooling mechanism (13) is provided on one side of the cooling shell (1), and the cooling mechanism (13) is connected to the liquid outlet box (8) and the liquid inlet box (9).

4. The exhaust gas recirculation cooler housing of a natural gas heavy truck engine according to claim 1, characterized in that: The outer sides of the connecting pipe (5), the air return pipe (7) and part of the air outlet pipe (6) are connected with heat dissipation fins (14).

5. The exhaust gas recirculation cooler housing of a natural gas heavy truck engine according to claim 1, characterized in that: A heat insulation layer (15) is provided on the outside of the portion of the air outlet pipe (6) passing through the air return housing (2).

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