CN214836638U

CN214836638U - Engine tail pipe cooling device

Info

Publication number: CN214836638U
Application number: CN202120679061.0U
Authority: CN
Inventors: 刘祯; 谢东升; 李正; 马飞
Original assignee: Hubei University of Arts and Science
Current assignee: Hubei Kangjirun Dynamo Electric Technology Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-11-23
Anticipated expiration: 2031-04-02

Abstract

The utility model discloses an engine tail pipe cooling device, including exhaust pipe structure and cooling subassembly, the exhaust pipe structure includes the blast pipe, the blast pipe has along the exhaust passage of level direction extension, exhaust passage has relative tail gas import and the tail gas export of setting up, the tail gas import is used for communicating the automobile tail pipe, the tail gas export is used for communicating the outside air; the cooling assembly comprises an installation sleeve and a spray head, the installation sleeve is sleeved outside the exhaust pipe, a heat dissipation space is formed between the installation sleeve and the exhaust channel, and a spraying end of the spray head extends into the heat dissipation space and is used for spraying cooling gas to the heat dissipation space. The device is in lap joint with the tail pipe of the automobile, has compact structure and small occupied space, and can play the roles of accelerating the cooling speed of high-temperature tail gas and reducing the temperature of the exhaust pipe.

Description

Engine tail pipe cooling device

Technical Field

The utility model relates to the technical field of engines, in particular to engine tail pipe heat sink.

Background

The engine is used as a general power device, has wide application and great effect, is an important power component in the automobile industry, and the tail pipe is used as a part of an engine exhaust system and is mainly used for discharging high-temperature tail gas generated by the engine, the high-temperature tail gas not only has great influence on the service life of the tail pipe, but also often brings some potential safety hazards in some closed or dust-explosive spaces, so that the tail pipe of the engine needs to be provided with a heat dissipation or cooling device.

At present, a common cooling device is complex in structure and large in size, and a heat dissipation structure or a cooling structure needs to be independently arranged, so that the compactness is not high, and the heat dissipation and cooling efficiency is not high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an engine tail pipe heat sink is suitable for on heavy vehicle and the partial special equipment, can effectual improvement heat dissipation cooling efficiency.

In order to achieve the above object, the utility model provides an engine tail pipe heat sink, include:

the exhaust pipe structure comprises an exhaust pipe, wherein the exhaust pipe is provided with an exhaust channel extending along the horizontal direction, the exhaust channel is provided with a tail gas inlet and a tail gas outlet which are oppositely arranged, the tail gas inlet is used for being communicated with an automobile tail pipe, and the tail gas outlet is used for being communicated with the outside air; and the number of the first and second groups,

the cooling assembly comprises an installation sleeve and a spray head, the installation sleeve is sleeved outside the exhaust pipe, a heat dissipation space is formed between the installation sleeve and the exhaust channel, and a spraying end of the spray head extends into the heat dissipation space and is used for spraying cooling gas to the heat dissipation space.

Optionally, the exhaust pipe includes a plurality of arc-shaped connecting plates that are arranged along the installation sleeve circumference upward at intervals, and along the installation sleeve circumference upward, a plurality of arc-shaped connecting plates surround end to form the exhaust passage.

Optionally, the cooling assembly further includes a plurality of heat dissipation rib plates located in the heat dissipation space, the plurality of heat dissipation rib plates are arranged at intervals along the circumferential direction of the exhaust pipe, and two ends of each heat dissipation rib plate, which are opposite to each other in the radial direction of the exhaust pipe, are respectively and fixedly connected to the outer wall surface of the exhaust pipe and the inner wall surface of the mounting sleeve.

Optionally, at least one of the heat dissipation rib plates is provided with a plurality of heat exchangers, the plurality of heat exchangers are arranged at intervals along the length direction of the heat dissipation rib plate, the air inlet of each heat exchanger is communicated with the exhaust passage, and the air outlet of each heat exchanger is used for being communicated with outside air.

Optionally, the exhaust pipe structure further comprises a first connecting pipe arranged at the exhaust pipe tail gas inlet, the first connecting pipe is used for connecting an automobile tail pipe and the tail gas inlet, and the diameter of one end of the first connecting pipe, which is far away from the exhaust pipe, is gradually increased towards the direction of the end connected with the exhaust pipe.

Optionally, the exhaust pipe structure further comprises a gas mixing pipe, an air inlet gap is formed between the gas mixing pipe and the exhaust gas outlet of the exhaust pipe, and the gas mixing pipe is used for communicating with the outside air;

the cooling assembly is characterized by further comprising a blade assembly arranged in the gas mixing pipe and used for sucking the outside air into the gas mixing pipe through the air inlet gap and discharging the air after the air is mixed with the tail gas and cooled.

Optionally, the vane assembly includes a rotating shaft rotatably mounted in the middle of the gas mixing tail pipe along the axis of the gas mixing pipe, and a plurality of vanes disposed at intervals in the circumferential direction of the rotating shaft.

Optionally, the gas mixing pipe comprises a pipe body and a transition pipe which are connected in sequence, an inner cavity of the pipe body is used for installing the blade assembly, the transition pipe is connected with the exhaust pipe, and the transition pipe is arranged towards the exhaust pipe in a manner that the diameter of the transition pipe is gradually reduced; and/or the presence of a gas in the gas,

a second connecting pipe is arranged between the gas mixing pipe and the exhaust pipe, and the diameter of the second connecting pipe is gradually reduced towards the gas mixing pipe; and/or the presence of a gas in the gas,

the blast pipe structure is still including locating the flow shield that separates of blast pipe tail gas exit department, flow shield covers and locates the surface of gas mixing pipe, just flow shield keeps away from the blast pipe is the diameter and increases gradually the setting, is used for with steam in the heat dissipation space is followed flow shield's outer wall is derived.

Optionally, the diameter of the end of the second connecting pipe facing the gas mixing pipe is D1, and the diameter of the end of the transition pipe close to the exhaust pipe is D2, wherein D1< D2.

Optionally, the shower nozzle is equipped with a plurality ofly, and is a plurality of the shower nozzle is followed the circumference interval setting of installation sleeve, and is a plurality of the shower nozzle is used for intercommunication atomizer chamber or cold air room in order to correspond and spray fog or cold air.

The technical scheme of the utility model, the high temperature tail gas that the engine flows out gets into through tail pipe in the exhaust duct flow in the exhaust passage, through the shower nozzle to spray cooling gas in the heat dissipation space to take away high temperature tail gas and spread the heat on blast pipe surface, thereby with high temperature tail gas in the exhaust passage reduces the temperature at the in-process that flows gradually, and the device sets up with the tail pipe overlap joint of car, compact structure, and occupation space is little, can play the cooling rate who accelerates high temperature tail gas, reduces the effect of blast pipe temperature.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic perspective view of an embodiment (an angle) of a cooling device for an engine tail pipe according to the present invention;

FIG. 2 is a perspective view of the exhaust pipe of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along A-A of FIG. 1;

fig. 4 is a schematic cross-sectional view taken along line B-B in fig. 1.

FIG. 5 is a perspective view of an embodiment (at another angle) of the engine tailpipe temperature reducing device of FIG. 1;

the reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if the present invention relates to a directional indication, the directional indication is only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The tail pipe is used as a part of an engine exhaust system and is mainly used for discharging high-temperature tail gas generated by an engine, the high-temperature tail gas has great influence on the service life of the tail pipe, and in some closed or dust-explosive spaces, some potential safety hazards are often brought, and the high-temperature state is also easily detected by infrared in military survey, so that the tail pipe of the engine needs to be provided with a heat dissipation or cooling device. At present, most of common cooling devices are water cooling or air cooling, but the structure is complex, the size is large, and a heat dissipation structure or a cooling structure needs to be independently arranged, so that the compactness is not high, the effect is single, and the heat dissipation and cooling efficiency is not high.

In view of this, the utility model provides an engine tail pipe heat sink, the gaseous process that automobile tail pipe discharged the blast pipe in the air is discharged after the cooling down of the effect of shower nozzle, can effectual improvement heat dissipation cooling efficiency. Fig. 1 to fig. 5 show an embodiment of the device for cooling down the tail pipe of an engine according to the present invention.

Referring to fig. 1 to 4, an engine tail pipe cooling device 100 includes an exhaust pipe structure and a cooling assembly 2, where the exhaust pipe structure includes an exhaust pipe 11, the exhaust pipe 11 has an exhaust channel 11a extending along a horizontal direction, the exhaust channel 11a has an exhaust inlet 11b and an exhaust outlet 11c opposite to each other, the exhaust inlet 11b is used for communicating with an automobile tail pipe, and the exhaust outlet 11c is used for communicating with outside air; the cooling assembly 2 comprises a mounting sleeve 21 and a spray head 22, the mounting sleeve 21 is sleeved outside the exhaust pipe 11, a heat dissipation space a is formed between the mounting sleeve 21 and the exhaust passage 11a, and a spraying end of the spray head 22 extends into the heat dissipation space a to spray cooling gas to the heat dissipation space a.

The technical scheme of the utility model, the high temperature tail gas that the engine flows out gets into through tail pipe in the blast pipe 11 flow in the exhaust passage 11a, through shower nozzle 22 to spray cooling gas in the heat dissipation space an to it spreads to take away high temperature tail gas the heat on blast pipe 11 surface, thereby with high temperature tail gas in the exhaust passage 11a reduces the temperature at the in-process that flows gradually, and the device sets up with the tail pipe overlap joint of car, compact structure, and occupation space is little, can play the cooling rate that accelerates high temperature tail gas, reduce the effect of 11 temperatures of blast pipe.

Specifically, the exhaust pipe 11 includes a plurality of arc-shaped connecting plates 111 arranged along the circumferential direction of the mounting sleeve 21 at intervals, and along the circumferential direction of the mounting sleeve 21, the plurality of arc-shaped connecting plates 111 are connected end to form the exhaust passage 11 a. Each arc connecting plate 111 is all certainly the center of blast pipe 11 is protruding to the edge and is established, makes a plurality of the similar plum blossom shape in cross-section of exhaust passage 11a that arc connecting plate 111 concatenation formed has not only increased radiating area of contact like this, has increased the circulation volume moreover for the tail gas flow speed that comes out from tail pipe is put slowly, improves the cooling effect.

Furthermore, smooth processing is carried out between two adjacent arc-shaped connecting plates 111, no sharp corner exists, and no particle residual scale is left.

Based on the above embodiment, referring to fig. 2, the cooling module 2 further includes a plurality of heat dissipation rib plates 12 located in the heat dissipation space a, the plurality of heat dissipation rib plates 12 are arranged at intervals along the circumferential direction of the exhaust pipe 11, and two ends of each heat dissipation rib plate 12, which are opposite to each other along the radial direction of the exhaust pipe 11, are respectively and fixedly connected to the outer wall surface of the exhaust pipe 11 and the inner wall surface of the mounting sleeve 21. The heat dissipation rib plates 12 are made of metal with good heat conductivity, and the heat dissipation rib plates 12 are located at the splicing depressions of the arc-shaped connecting plates 111, so that the occupied volume of the heat dissipation rib plates 12 in the heat dissipation space a is the minimum, and the influence on the surface heat dissipation efficiency of the exhaust pipe 11 is the minimum.

Furthermore, at least one of the heat dissipation rib plates 12 is provided with a plurality of heat exchangers 14, the plurality of heat exchangers 14 are arranged at intervals along the length direction of the heat dissipation rib plate 12, the air inlet of each heat exchanger 14 is communicated with the exhaust passage 11a, and the air outlet of each heat exchanger 14 is used for being communicated with the outside air. The tail gas in the exhaust pipe 11 can fully exchange heat with the heat dissipation rib plates 12 and the heat exchangers 14, and meanwhile, the spray head 22 sprays cooling gas or liquid to cool the heat dissipation space a, so that the outer surface of the exhaust pipe 11 is cooled, and the heat dissipation and cooling efficiency can be effectively improved due to the cooperation of multiple heat exchange modes.

In order to slow down the running speed of the exhaust gas in the exhaust passage 11a, the exhaust pipe structure further comprises a first connecting pipe 13 arranged at an exhaust inlet 11b of the exhaust pipe 11, wherein the first connecting pipe 13 is used for connecting an automobile tail pipe and the exhaust inlet 11b, and the diameter of the first connecting pipe 13 gradually increases from one end far away from the exhaust pipe 11 to one end connected with the exhaust pipe 11. Because the circulation cross-section of tail gas is grow gradually, and tail gas flow speed slows down, the time of flowing through becomes long in blast pipe 11, for cooling subassembly 2 provides more cooling time for the heat exchange is more abundant.

In order to further improve the efficiency of heat dissipation and temperature reduction, in this embodiment, the exhaust pipe structure further includes a gas mixing pipe 15, an air intake gap is formed between the gas mixing pipe 15 and the exhaust gas outlet 11c of the exhaust pipe 11, and the gas mixing pipe 15 is used for communicating with the outside air; cooling subassembly 2 is still including locating blade subassembly 23 in the gas mixing pipe 15 for pass through the air inlet gap inhales extremely discharge after cooling with the tail gas mixture in the gas mixing pipe 15. So set up, earlier pass through shower nozzle 22 is right high temperature tail gas in the blast pipe 11 carries out the cooling treatment of first stage, then, the rethread blade subassembly 23 is right tail gas in the gas mixing tube 15 carries out the mixed cooling treatment of second stage, realizes dual heat dissipation and cooling effect, can effectual improvement heat dissipation cooling efficiency.

Further, the vane assembly 23 includes a rotating shaft 231 and a plurality of vanes 232, the rotating shaft 231 is rotatably mounted at the middle of the gas mixing tail pipe along the axis of the gas mixing pipe 15, and the plurality of vanes 232 are spaced along the circumferential direction of the rotating shaft 231. The plurality of blades 232 agitate the air to form an air flow for facilitating the intake mixing of the external air. Specifically, the rotating shaft 231 can be driven to rotate by a motor, and the blades 232 can be driven to rotate according to the airflow entering from the negative pressure, so that the rotating direction of the blades 232 and the air entering direction need to be noticed during design, and the air accumulation and the exhaust influence are prevented.

It should be noted that the sizes of the exhaust pipe 11 and the gas mixing pipe 15 can be adjusted according to the actual working environment, and the present application is not limited further.

Referring to fig. 4, a plurality of spray heads 22 are provided, the plurality of spray heads 22 are arranged along the circumferential direction of the mounting sleeve 21 at intervals, and the plurality of spray heads 22 are used for communicating with an atomizing chamber or a cold air chamber to correspondingly spray mist or cold air. The temperature of the heat dissipation space a is adjusted in a mode of absorbing heat through mist evaporation or cooling air exchange.

Further, the nozzle 22 can be connected to the cold air generated by the vehicle air conditioner through a pipeline for spraying, no additional cold air conveying device is needed, and when the gas sprayed by the nozzle 22 is mist, a concentrated cooling liquid micro-atomization device can be used.

In an embodiment of the present invention, the gas mixing pipe 15 includes a pipe body and a transition pipe 151 connected in sequence, the inner cavity of the pipe body is used for the installation of the blade assembly 23, the transition pipe 151 and the exhaust pipe 11 therebetween form the air inlet gap, the transition pipe 151 faces the exhaust pipe 11 is a diameter gradually decreasing device. By reducing the speed of the exhaust gas flow for controlling the exhaust gas transmission, negative pressure can be formed between the exhaust gas outlet 11c, and external air can be sucked conveniently.

In another embodiment of the present application, a second connection pipe 16 is disposed between the gas mixing pipe 15 and the exhaust pipe 11, and the second connection pipe 16 is disposed with a diameter gradually decreasing toward the gas mixing pipe 15, so that the speed of exhaust gas transmission is controlled by reducing the flow rate of the exhaust gas, thereby affecting the pressure at the periphery.

For preventing the steam of exchange gets into in the heat dissipation space a in the gas mixing tube 15, the exhaust pipe structure is still including locating the exhaust outlet 11c department of blast pipe 11 separates the flow cover 17, separate the flow cover 17 cover and locate the surface of gas mixing tube 15, just separate and flow the cover 17 and keep away from blast pipe 11 is the diameter and increases gradually and sets up, be used for with steam in the heat dissipation space a is followed separate the outer wall of flow cover 17 and is derived. So arranged, the hot gas can be dissipated to the periphery along the outer wall of the flow-isolating cover 17, and the air can be flushed into the gas mixing pipe 15 along the inner wall of the flow-isolating cover 17, thereby separating the hotter air flowing out of the heat dissipation space from the cooler air entering the gas buffer pipe.

It should be noted that, the above three associated technical features: transition pipe 151, second connecting pipe 16, separate and flow cover 17, can the alternative setting, select two settings or set up simultaneously, set up three characteristics simultaneously in this embodiment, the effect is better, and is concrete, separate and flow cover 17 cover and locate the surface of transition pipe 151, second connecting pipe 16 certainly the opening part of transition pipe 151 stretches into in the transition pipe 151.

When the transition pipe 151 and the second connection pipe 16 are simultaneously disposed, the diameter of the end of the second connection pipe 16 facing the gas mixing pipe 15 is D1, and the diameter of the end of the transition pipe 151 near the exhaust pipe 11 is D2, wherein D1< D2. So set up make between transition pipe 151 with second connecting pipe 16 form the air intake clearance can inhale gas mixing pipe 15 way and hot tail gas mixture with the air of external environment from the circumference space under the effect of negative pressure to reach the cooling effect.

Based on the above embodiment, the side end of the transition pipe 151 connected to the pipe body and the side end of the second connecting pipe 16 close to the pipe body are located on the same plane, so that more external ambient air can enter the gas mixing pipe 15 for mixing, and the tail gas is prevented from being repelled in the transition pipe 151 to affect the mixing effect.

In the present application, the exhaust pipe 11, the first connection pipe 13, the second connection pipe 16, the flow blocking cover 17, and the gas mixing pipe 15 are all provided coaxially with a tail pipe of an automobile.

Specifically, the heat dissipation principle of the engine tail pipe cooling device 100 is as follows:

in the first stage of heat dissipation and temperature reduction, high-temperature tail gas flowing out of an engine enters the exhaust pipe 11 through the exhaust tail pipe through the first connecting pipe 13, the flow section of the tail gas is gradually increased, the flow time of the tail gas in the exhaust pipe 11 is prolonged, and the heat dissipation space a outside the exhaust pipe 11 can take away most of heat in the high-temperature tail gas greatly under the combined action of the heat dissipation rib plates 12, the heat exchanger 14 and the spray head 22. Thirdly, the heat dissipation rib plates 12 and the plurality of heat exchangers 14 are arranged outside the exhaust pipe 11, so that the heat of the exhaust channel 11a can be greatly transferred to the outside for heat dissipation, the heat dissipation degree is increased under the flowing action of cold air or mist, the heat dissipation efficiency is accelerated, and the temperature is effectively reduced. The cooling in the first stage is mainly realized by atomization heat dissipation or cold air heat dissipation.

In the second stage of heat dissipation, when the exhaust gas enters the gas mixing pipe 15 from the exhaust pipe 11 through the second connecting pipe 16, because the second connecting pipe 16 is radially narrowed, pressure potential energy is converted to kinetic energy at the outlet to form jet flow with higher flow speed, the pressure at the outlet is lower than the pressure of the external environment, under the action of negative pressure, external environment air is sucked into the gas mixing pipe 15 through the end part, and under the action of the blade assembly 23, the environment air and the exhaust gas are fully mixed to realize the full exchange of energy, thereby achieving the effect of temperature reduction. The heat dissipation of the second stage mainly forms negative pressure through the change of the flow velocity, produces the suction effect, and then mixes the low ambient air of external world and reaches the effect of cooling and discharging.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. An engine tail pipe cooling device, comprising:

2. The engine tailpipe cooling device according to claim 1, wherein the exhaust pipe includes a plurality of arc-shaped connecting plates arranged at intervals circumferentially along the mounting sleeve, and the plurality of arc-shaped connecting plates are joined end to define the exhaust passage circumferentially along the mounting sleeve.

3. The engine tail pipe cooling device according to claim 1, wherein the cooling assembly further comprises a plurality of heat dissipation rib plates located in the heat dissipation space, the plurality of heat dissipation rib plates are arranged at intervals along the circumferential direction of the exhaust pipe, and two ends of each heat dissipation rib plate, which are opposite to each other in the radial direction of the exhaust pipe, are respectively and fixedly connected to the outer wall surface of the exhaust pipe and the inner wall surface of the mounting sleeve.

4. The engine tail pipe temperature reduction device according to claim 3, wherein at least one of the heat dissipation rib plates is provided with a plurality of heat exchangers, the plurality of heat exchangers are arranged at intervals along the length direction of the heat dissipation rib plate, the air inlet of each heat exchanger is communicated with the exhaust passage, and the air outlet of each heat exchanger is communicated with outside air.

5. The engine tail pipe cooling device according to claim 1, wherein the exhaust pipe structure further comprises a first connection pipe provided at the exhaust inlet of the exhaust pipe, the first connection pipe being used to connect the tail pipe of the vehicle and the exhaust inlet, and the first connection pipe gradually increases in diameter from an end away from the exhaust pipe toward an end connected to the exhaust pipe.

6. The engine tail pipe cooling device according to claim 1, wherein the exhaust pipe structure further comprises a gas mixing pipe, an air inlet gap is formed between the gas mixing pipe and the tail gas outlet of the exhaust pipe, and the gas mixing pipe is used for communicating with outside air;

7. The engine tail pipe temperature reduction device according to claim 6, wherein the vane assembly comprises a rotating shaft rotatably mounted to a middle portion of the gas mixing tail pipe along an axis of the gas mixing pipe, and a plurality of vanes spaced apart along a circumferential direction of the rotating shaft.

8. The engine tail pipe cooling device according to claim 7, wherein the gas mixing pipe comprises a pipe body and a transition pipe which are connected in sequence, an inner cavity of the pipe body is used for installing the blade assembly, the transition pipe and the exhaust pipe form the air inlet gap, and the transition pipe is arranged in a manner that the diameter of the transition pipe is gradually reduced towards the exhaust pipe; and/or the presence of a gas in the gas,

9. The engine tailpipe cooling arrangement according to claim 8, wherein the diameter of the end of the second connecting pipe towards the gas mixing pipe is D1, and the diameter of the end of the transition pipe near the exhaust pipe is D2, where D1< D2.

10. The engine tail pipe temperature reduction device according to claim 1, wherein a plurality of nozzles are provided, the plurality of nozzles are arranged at intervals along the circumferential direction of the mounting sleeve, and the plurality of nozzles are used for communicating with an atomizing chamber or a cold air chamber to correspondingly spray mist or cold air.