CN219081682U

CN219081682U - Engine exhaust pipe

Info

Publication number: CN219081682U
Application number: CN202222962978.9U
Authority: CN
Inventors: 巴建栋; 王莎; 张立新; 李元帝; 张栋; 张国; 邓文乐; 吴江涛
Original assignee: Shaanxi North Dynamic Co ltd
Current assignee: Shaanxi North Dynamic Co ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-05-26
Anticipated expiration: 2032-11-08

Abstract

The application discloses an engine exhaust pipe relates to blast pipe technical field. The technical problems that the peripheral parts and bending deformation are easy to damage at high temperature of an engine exhaust pipe in the prior art are solved. The engine exhaust pipe is an integrally formed straight pipe and is arranged in the engine; the exhaust pipe has a compact structure; a plurality of exhaust inlets are arranged on one side of the engine exhaust pipe in parallel, and the exhaust inlets are connected with an exhaust port of the engine to guide exhaust gas to enter the engine exhaust pipe; an exhaust outlet is arranged at one end of the engine exhaust pipe; and one side of the engine exhaust pipe, which is away from the exhaust inlet, is provided with a plurality of heat shield mounting holes for fixing the heat shield. The heat shield can prevent the high temperature of the exhaust pipe from damaging surrounding sensors or components, and can also maintain certain exhaust pressure. Therefore, the engine exhaust pipe provided by the embodiment of the application is simple in integral structure, convenient to install, space-saving and manufacturing cost-saving.

Description

Engine exhaust pipe

Technical Field

The application relates to the technical field of exhaust pipes, in particular to an engine exhaust pipe.

Background

With the rapid development of economy, the integration design of engine parts is more and more important. Since exhaust gas needs to be discharged after combustion of the mixed gas in the engine cylinder, an exhaust pipe is attached to an exhaust port of the engine cylinder.

The prior art engine exhaust pipe is typically a bare single exhaust pipe. In the working process, the temperature of exhaust gas released by the engine is very high, the heat insulation effect of the existing exhaust pipe is poor, the surrounding parts around the exhaust pipe can be damaged, and operators are easy to scald. Secondly, the exposed exhaust pipe has a certain length, for example, a heavy large clip runs on a bumpy road for a long time, so that the exposed exhaust pipe is easy to bend and deform, and the service life of the exhaust pipe is influenced.

Disclosure of Invention

The embodiment of the application solves the technical problems that in the prior art, surrounding parts are easy to damage at high temperature and the engine exhaust pipe is bent and deformed by providing the engine exhaust pipe.

The embodiment of the utility model provides an engine exhaust pipe, which is an integrally formed straight pipe and is arranged in an engine; a plurality of exhaust inlets are arranged on one side of the engine exhaust pipe in parallel, and the exhaust inlets are connected with an exhaust port of the engine to guide exhaust gas to enter the engine exhaust pipe; an exhaust outlet is arranged at one end of the engine exhaust pipe; and one side of the engine exhaust pipe, which is away from the exhaust inlet, is provided with a plurality of heat shield mounting holes for fixing the heat shield.

In one possible implementation, a plurality of intake flanges are included; the air inlet flanges are arranged at the exhaust inlet, and each air inlet flange is provided with a fixing hole.

In one possible implementation, at least one of the fixing holes is used for positioning when the engine exhaust pipe is installed, and is arranged at the air inlet flange in the middle of the engine exhaust pipe.

In one possible implementation, at least one of the fixing holes is used for adjusting a position when the engine exhaust pipe is installed, and is arranged on the air inlet flange of the end part of the engine exhaust pipe far from the exhaust outlet; the fixing hole for positioning and the fixing hole for adjusting position are arranged on the same side of the engine exhaust pipe, and the gravity center of the engine exhaust pipe is positioned between the fixing hole for positioning and the fixing hole for adjusting position.

In one possible implementation, the device further comprises an air outlet flange; the air outlet flange is arranged at the air outlet, and the air outlet flange is provided with a connecting hole.

In one possible implementation, the aperture of the exhaust inlet is larger than the aperture of the exhaust outlet of the engine.

In one possible implementation, the engine exhaust pipe is made of cast iron.

One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:

the engine exhaust pipe provided by the embodiment of the utility model is provided with an exhaust inlet and an exhaust outlet, is an integrally formed straight pipe and is arranged in the engine. The engine exhaust pipe is integrated in the engine and has a compact structure, and the exhaust pipe cannot be bent and deformed. A plurality of heat shield mounting holes are formed in one side, away from an exhaust inlet, of the engine exhaust pipe and are used for fixing the heat shield. The heat shield can prevent the high temperature of the exhaust pipe from damaging surrounding sensors or components, and can also maintain certain exhaust pressure. Therefore, the engine exhaust pipe provided by the embodiment of the application is simple in integral structure, smooth in exhaust gas, convenient to install, space-saving and manufacturing cost-saving.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments of the present utility model or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an engine exhaust pipe according to an embodiment of the present application;

fig. 2 is a schematic view of a supercharger flange structure of an engine exhaust pipe according to an embodiment of the present application;

FIG. 3 is a schematic structural view of a heat shield mounting hole of an engine exhaust pipe according to an embodiment of the present disclosure;

fig. 4 is an installation schematic diagram of an engine exhaust pipe according to an embodiment of the present application.

Reference numerals: 1-an engine exhaust pipe; 11-an exhaust inlet; 12-an air inlet flange; 121-fixing holes; 13-heat shield mounting holes; 14-an air outlet flange; 141-connecting holes; 15-an exhaust outlet; 2-connecting pipes; 3-engine.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the embodiments of the present utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, as well as being fixedly connected, detachably connected, or integrally connected, for example. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

The engine exhaust pipe provided in the embodiment of the application is as shown in fig. 1 to 4, fig. 1 is a schematic structural diagram of the engine exhaust pipe provided in the embodiment of the application, and fig. 2 is a schematic structural diagram of a supercharger flange of the engine exhaust pipe provided in the embodiment of the application. Fig. 3 is a schematic structural diagram of a heat shield mounting hole of an engine exhaust pipe according to an embodiment of the present application, and fig. 4 is a schematic structural diagram of an engine exhaust pipe according to an embodiment of the present application.

As shown in fig. 4, the engine exhaust pipe 1 provided in the embodiment of the present application is an integrally formed straight pipe and is disposed inside the engine 3. The engine exhaust pipe 1 is integrated in the engine 3 and has a compact structure, the exhaust pipe cannot be bent and deformed, the whole structure is simple, exhaust gas is smooth, and the installation is convenient.

As shown in fig. 1, a plurality of exhaust inlets 11 are juxtaposed on one side of the engine exhaust pipe 1, the exhaust inlets 11 being connected with exhaust ports of the engine 3 to guide exhaust gas into the engine exhaust pipe 1.

As shown in fig. 4, one end of the engine exhaust pipe 1 is provided with an exhaust outlet 15. For discharging exhaust gas in the engine exhaust pipe 1 through the connection pipe 2. In the case of a diesel engine, exhaust gas can be discharged into the turbocharger scroll through the connecting pipe 2 to drive the turbocharger to work.

As shown in fig. 3, the side of the engine exhaust pipe 1 facing away from the exhaust inlet 11 is provided with a plurality of heat shield mounting holes 13 for fixing the heat shield. The exhaust gas temperature released by the engine 3 during operation is very high, the heat insulation effect of the existing engine exhaust pipe 1 is poor, the sensors or parts around the engine exhaust pipe 1 can be damaged, even an oil pipe can be ignited or an oil tank is caused to leak oil, and operators can be scalded easily. The heat shield is arranged on the engine exhaust pipe 1, firstly, the heat shield can prevent the high temperature of the engine exhaust pipe 1 from damaging surrounding sensors or components; secondly, the heat shield can maintain a certain exhaust pressure; finally, the heat shield can also prevent operators from scalding accidents in the maintenance process.

With continued reference to FIG. 3, 4 heat shield mounting holes 13 may be provided. Of course, the number is not limited to 4, and 5 or 6 may be provided so that the heat shield can be fixed to the engine exhaust pipe 1.

The engine exhaust pipe 1 provided in the embodiment of the present application includes a plurality of intake flanges 12. The intake flanges 12 are provided to the exhaust inlet 11, and each intake flange 12 is provided with a fixing hole 121.

As shown in fig. 1, the intake flange 12 is a cylinder head for connecting with the engine 3, and the intake flange 12 is provided with a fixing hole 121.

In one implementation manner of the embodiment of the present application, the air inlet flange 12 is provided with two fixing holes 121, and the assembly is completed with the cylinder cover of the engine 3 through the bolts of M8. Of course, not limited to the two fixing holes 121 provided to the

intake flange

12, 3 or 4 may be provided in order to increase the mounting strength between the engine exhaust pipe 1 and the engine 3.

As shown in fig. 3, at least one of the fixing holes 121 is used for positioning when the engine exhaust pipe 1 is mounted and is provided to the intake flange 12 in the middle of the engine exhaust pipe 1, and at least one of the fixing holes 121 is used for adjusting the position when the engine exhaust pipe 1 is mounted and is provided to the intake flange 12 in the end of the engine exhaust pipe 1 that is away from the exhaust outlet 15.

The fixing hole 121 for positioning and the fixing hole 121 for adjusting the position are provided on the same side of the exhaust pipe 1 of the engine 3. May be provided at the lower end of the intake flange 12 at the same time or at the upper end of the proceeding flange at the same time, mainly for the purpose of facilitating the installation of the engine exhaust pipe 1.

The center of gravity of the engine exhaust pipe 1 is located between the positioned fixing hole 121 and the position-adjusting fixing hole 121. Since the center of gravity of the engine exhaust pipe 1 is located between the positioning fixing hole 121 and the position-adjusting fixing hole 121, it is possible to avoid the engine exhaust pipe 1 rotating around the positioning fixing hole 121 under the action of gravity during assembly, and the bolt hole dislocation at the position far from the positioning fixing hole 121 is large, resulting in the failure of the engine exhaust pipe 1 in air leakage, cover hole, etc.

Specifically, the diameter of the fixing hole 121 for positioning is 8.5mm, the size of the fixing hole 121 for adjusting position is 8.5mm×10mm, and the diameters of the other fixing holes 121 are 10mm. The width of the fixing hole 121 for adjusting the position is the same as the diameter of the fixing hole 121 for positioning. Since the diameter of the fixing hole 121 for positioning is small, the deformation resistance of the bolt in the fixing hole 121 for positioning against the exhaust pipe is large when the exhaust pipe 1 of the engine 3 is heated, and the bolt in the fixing hole 121 for adjusting the position reserves a certain space for the deformation of the exhaust pipe 1 of the engine, and the deformation resistance is small. Therefore, when the engine exhaust pipe 1 is heated, the deformation amount of the engine exhaust pipe 1 at the fixing hole 121 for positioning is small, the shearing force to the bolt is small, and the deformation amount of the fixing hole 121 for adjusting the position is large, but the shearing force is not formed to the bolt, and at the same time, the deformation amount of the fixing hole 121 for adjusting the position is large, but since the reserved deformation amount of the fixing hole 121 for adjusting the position is larger than the deformation amount of the engine exhaust pipe 1, the failure such as blow-by gas, the cover hole, the exhaust resistance is large is not caused.

The engine exhaust pipe 1 provided in the embodiment of the present application further includes an air outlet flange 14. The air outlet flange 14 is provided at the air outlet 15, and the air outlet flange 14 is provided with connection holes 141.

As shown in fig. 2, the outlet flange 14 may have a triangular shape, and 3 connection holes 141 are provided at each of three corners of the triangular shape for increasing the connection strength with the connection pipe 2 and discharging the exhaust gas into the next passage. Of course, the outlet flange 14 is not limited to a triangular structure, and may have other structures, such as a circular shape or a square shape.

In one implementation of the present embodiment, the aperture of the exhaust inlet 11 is larger than the aperture of the exhaust outlet of the engine 3. The increased exhaust inlet 11 facilitates rapid exhaust gas discharge.

Further, the engine exhaust pipe 1 is made of cast iron. The heat-resistant cast iron QTRSi4Mo1 can reach 800 ℃ in an air furnace, can effectively prevent the heat deformation of the engine exhaust pipe 1 under the action of high-temperature waste gas, and prolongs the service life of the engine exhaust pipe 1.

In this specification, each embodiment is described in a progressive manner, and the same or similar parts of each embodiment are referred to each other, and each embodiment is mainly described as a difference from other embodiments.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the present application; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions.

Claims

1. An engine exhaust pipe is characterized in that the engine exhaust pipe (1) is an integrally formed straight pipe and is arranged in an engine (3);

a plurality of exhaust inlets (11) are arranged on one side of the engine exhaust pipe (1) in parallel, and the exhaust inlets (11) are connected with exhaust ports of the engine (3) to guide exhaust gas to enter the engine exhaust pipe (1);

an exhaust outlet (15) is formed in one end of the engine exhaust pipe (1);

a plurality of heat shield mounting holes (13) are formed in one side, away from the exhaust inlet (11), of the engine exhaust pipe (1) and are used for fixing a heat shield.

2. The engine exhaust pipe according to claim 1, characterized by comprising a plurality of intake flanges (12);

the air inlet flanges (12) are arranged at the exhaust inlet (11), and each air inlet flange (12) is provided with a fixing hole (121).

3. The engine exhaust pipe according to claim 2, characterized in that at least one of the fixing holes (121) is used for positioning when the engine exhaust pipe (1) is mounted, and is provided at the intake flange (12) in the middle of the engine exhaust pipe (1).

4. An engine exhaust pipe according to claim 3, characterized in that at least one of the fixing holes (121) is used for adjusting the position when the engine exhaust pipe (1) is mounted, and is provided to the intake flange (12) of the end of the engine exhaust pipe (1) remote from the exhaust outlet (15);

the fixing hole (121) for positioning and the fixing hole (121) for adjusting position are arranged on the same side of the engine exhaust pipe (1), and the center of gravity of the engine exhaust pipe (1) is located between the fixing hole (121) for positioning and the fixing hole (121) for adjusting position.

5. The engine exhaust pipe according to claim 1, further comprising an air outlet flange (14);

the air outlet flange (14) is arranged at the air outlet (15), and the air outlet flange (14) is provided with a connecting hole (141).

6. The engine exhaust pipe according to claim 1, characterized in that the aperture of the exhaust inlet (11) is larger than the aperture of the exhaust port of the engine (3).

7. The engine exhaust pipe according to claim 1, characterized in that the engine exhaust pipe (1) is made of cast iron.