KR20220087263A - Inlet pipe structure for exhaust gas cleaning device - Google Patents

Abstract

The inlet structure of the exhaust gas purification apparatus according to an embodiment of the present invention guides exhaust gas discharged from the engine of the vehicle for work into the interior of the exhaust gas purification apparatus. The inlet structure of the exhaust gas purification apparatus according to an embodiment of the present invention includes a first inlet, one end connected to the exhaust port of the engine, to introduce the exhaust gas discharged from the engine, and the exhaust gas purification apparatus is provided. A second inlet connected at one end to the inlet of the exhaust gas purification device to supply gas, and both ends at the other end of the first inlet and the second inlet to guide the exhaust gas from the first inlet to the second inlet Is connected and may include a buffer-type pipe coupling member for absorbing vibration and external shock generated between the engine and the exhaust gas purification device. The buffer type pipe connector is formed of a material having higher flexibility and elasticity than the first inlet and the second inlet, and may be provided to be longer than the entire length of the first inlet and the second inlet.

Description

Inlet structure of exhaust gas purification device {INLET PIPE STRUCTURE FOR EXHAUST GAS CLEANING DEVICE}

The present invention relates to a structure of an inlet for guiding exhaust gas discharged from an engine of a vehicle for work into the interior of an exhaust gas purification device, and more particularly, smooth vibration and external shock generated between the engine and the exhaust gas purification device. It relates to an inlet structure of an exhaust gas purification device that can absorb and prevent damage to the inlet.

In general, an exhaust gas purification device is a device for removing harmful components contained in the exhaust gas by processing the exhaust gas generated from the engine.

Recently, due to the deepening of global warming and air pollution, there is a trend that the emission regulation of gas emitted from vehicles is strengthened. In particular, in the diesel engine of a work vehicle, it is true that a large amount of harmful particulates such as carbon monoxide, hydrocarbons, and nitrogen oxides are contained in exhaust gas due to incomplete combustion of fuel.

Accordingly, a high-performance exhaust gas purification device is applied to a working vehicle equipped with a diesel engine in order to prevent harmful particulates of the exhaust gas from being discharged into the atmosphere.

The exhaust gas purification apparatus as described above may be used in various ways according to the fuel main component of the engine, combustion efficiency, the shape of the engine, and the spatial shape of the engine room.

For example, as an exhaust gas purification device, a selective reduction catalyst (Selective Catalytic Reduction, SCR) method using a reducing agent such as urea, a diesel oxidation catalyst (Diesel Oxidation Catalyst, DOC) method, or an exhaust gas post-treatment (Diesel) Particulate Filter (DPF) method and NOx storage catalyst (Lean NOx Trap, LNT) method are used in various ways.

Recently, in order to further improve the exhaust gas purification performance, the above-mentioned exhaust gas purification devices are variously combined and applied to a work vehicle in a complex manner.

As a conventionally used complex type exhaust gas purification device, a structure for continuously purifying exhaust gas by connecting DOC (or DPF) and SCR with a mixing pipe is typically used. Here, the mixing pipe is configured for mixing after supplying a reducing agent to the exhaust gas between the DOC (or DPF) and the SCR.

On the other hand, the exhaust gas purification device and the engine are connected to the inlet for delivery of the exhaust gas in communication with each other.

If the existing inlet is formed only of a metal material, since the inlet is highly likely to be damaged by vibration or external shock generated between the engine and the exhaust gas purification device, a technology for improving this is being actively developed.

For example, in Korean Patent Application Laid-Open No. 10-2014-0075586 (Title of the invention: Compensation device for exhaust gas post-treatment system, published date: June 19, 2014), a connection for introducing exhaust gas into the exhaust gas post-treatment system A structure in which a tube section formed in a bellows type is disposed in the middle of the tube is disclosed. Accordingly, in Korean Patent Application Laid-Open No. 10-2014-0075586, the connection of the connector can be compensated for by the tube section, and vibrations and external shocks generated in the connector can be partially absorbed.

1 is a view showing the structure of the inlet 20 of the exhaust gas purification apparatus 10 according to the prior art, FIG. 2 is a view showing the disassembled state of the inlet 20 shown in FIG.

That is, an example of the structure of the inlet 20 of the exhaust gas purification apparatus 10 according to the prior art is shown in detail in FIGS. 1 and 2 .

1 and 2, the structure of the inlet 20 of the exhaust gas purification device 10 according to the prior art, the inlet 20 between the engine (not shown) and the exhaust gas purification device 10 However, it is a structure in which a bellows pipe 26 of a short length is connected in the middle of the injection hole 20 .

The inlet 20 includes a first inlet 22 having one end connected to the engine, a second inlet 24 having one end connected to the exhaust gas purification device 10, and a first inlet 22 and a second inlet ( 24) includes a bellows pipe 26 connecting both ends to the other end.

Here, in the inlet 20, the sensor installation parts 28 and 29 are formed in order to install a gas sensor (not shown) for detecting the exhaust gas. The sensor installation parts 28 and 29 are provided in the 1st inlet 22 and the 2nd inlet 24, respectively. Accordingly, the first inlet 22 and the second inlet 24 must extend to a sufficient length to smoothly form the sensor installation portions 28 and 29, and accordingly, the length of the bellows tube 26 is different from that of the engine and the exhaust. It becomes relatively short among the gas purifiers (10).

In addition, the first injection hole 22 and the second injection hole 24 are bent in a curved tube shape so that their other ends face each other. By bending the first inlet 22 and the second inlet 24 , the bellows pipe 26 can be more easily installed at the other end of the first inlet 22 and the second inlet 24 . If the other ends of the first inlet 22 and the second inlet 24 are disposed in different directions so as not to face each other, the installation of the bellows pipe 26 is impossible, or even if the bellows pipe 26 is installed, the bellows As the deformation of the tube 26 is deepened, the ability to absorb vibrations and external shocks is reduced.

In addition, the bellows pipe 26 is provided in a corrugated pipe structure to stably absorb vibration and external shock generated between the first inlet 22 and the second inlet 24 . However, in the related art, since the first inlet 22 and the second inlet 24 extend to a length sufficient to form the sensor installation portions 28 and 29, the length of the bellows tube 26 is bound to be relatively short. There is a problem that not only the performance of absorbing vibration and external shock by the bellows tube 26 is greatly reduced, but also the bellows tube 26 is frequently damaged.

In addition, in the related art, a flange portion 23 for connecting to the engine is formed at one end of the first inlet 22 . The flange portion 23 as described above is separately manufactured and then integrally connected to one end of the first inlet 22 by a welding method. Therefore, the conventional flange portion 23 is not normally connected to the first inlet 22 due to poor welding, so there is a problem in that the life and safety of the inlet 20 are greatly reduced.

Korean Patent Publication No. 10-2014-0075586 (published on Jun. 19, 2014)

An embodiment of the present invention provides an inlet structure of an exhaust gas purification device that can smoothly absorb and buffer vibrations and external shocks generated in the inlet, and effectively prevent damage to the inlet due to vibration and external shock .

In addition, an embodiment of the present invention provides an inlet structure of the exhaust gas purification device that can provide a simple structure of the inlet, and sufficiently secure the length of the configuration for absorbing vibration and external shock.

According to an embodiment of the present invention, it relates to an inlet structure of an exhaust gas purification device for guiding exhaust gas discharged from an engine of a work vehicle to the inside of the exhaust gas purification device.

The inlet structure of the exhaust gas purification apparatus according to an embodiment of the present invention includes a first inlet, one end connected to the exhaust port of the engine, to introduce the exhaust gas discharged from the engine, and the exhaust gas purification apparatus is provided. A second inlet connected at one end to the inlet of the exhaust gas purification device to supply gas, and both ends at the other end of the first inlet and the second inlet to guide the exhaust gas from the first inlet to the second inlet Is connected and may include a buffer-type pipe coupling member for absorbing vibration and external shock generated between the engine and the exhaust gas purification device.

The buffer type pipe connector is formed of a material having higher flexibility and elasticity than the first inlet and the second inlet, and may be provided to be longer than the entire length of the first inlet and the second inlet.

Preferably, the first inlet is provided at one end of the first inlet, and a first mounting portion mounted to the exhaust port of the engine, and the other end of the first inlet and connected to one end of the buffer type pipe connector It may include a first connection part.

The first mounting portion and the first connecting portion may be formed as an integral casting product by a casting method.

Preferably, the second inlet is provided at one end of the second inlet and provided at the other end of the second inlet and a second mounting part mounted to the inlet of the exhaust gas purification device, and the other end of the buffer type pipe connector. It may include a second connector connected to the.

The second mounting portion and the second connecting portion may be formed as an integral casting product by a casting method.

Preferably, at least one of the first connection part and the second connection part may be provided with a sensor installation unit integrally. A gas sensor for detecting exhaust gas passing through the first inlet or the second inlet may be installed in the sensor installation unit.

Preferably, the buffer-type pipe connection member may be provided in the form of a bellows pipe for absorbing vibration and external shock.

Here, the first injection hole and the second injection hole may extend in a straight line toward each other. The buffer-type pipe connector may be disposed between the first inlet and the second inlet in a straight line shape along the longitudinal direction of the first and second inlet.

In addition, the length of the first inlet and the second inlet may be provided to be constant regardless of the separation distance between the engine and the exhaust gas purification device, and the length of the buffer type pipe connecting member is the length of the engine and the exhaust gas purification device. It may be provided with a length corresponding to the separation distance of the device.

In the inlet structure of the exhaust gas purification apparatus according to an embodiment of the present invention, a buffer-type pipe connector is connected between the first inlet and the second inlet, and the buffer-type pipe connector has higher flexibility and elasticity than the first and second inlets. Since it is provided with a longer material, it is possible to more smoothly absorb vibrations and external shocks by the buffer-type pipe connection material, and the installation operation of the inlet can be made more easily. Therefore, in this embodiment, it is possible to prevent in advance that the buffer-type pipe connector is damaged by vibration and external impact, thereby improving the life and safety of use of the injection port.

In addition, since the inlet structure of the exhaust gas purification device according to the embodiment of the present invention is a structure in which the first inlet and the second inlet are formed as an integral casting product, the first and second inlet can be compactly formed with a short length, , it is possible to extend the length of the buffer-type pipe connector to the maximum by significantly reducing the length of the first and second inlets. Accordingly, the inlet of this embodiment can improve workability to be installed at the exhaust port of the engine and the inlet of the exhaust gas purification device, and can further increase the performance of the buffer type pipe connector.

In addition, the inlet structure of the exhaust gas purification device according to the embodiment of the present invention is cast in a form in which the sensor installation part is integrally formed with the first connection part of the first inlet or the second connection part of the second inlet. Since it is manufactured in this way, the first inlet and the second inlet can be provided in a compact and integrated structure, and the first and second inlet can be easily handled to improve installation workability.

In addition, in the inlet structure of the exhaust gas purification device according to the embodiment of the present invention, the first and second inlets are provided with a predetermined length, but the buffer type pipe connecting material is at a distance between the exhaust port of the engine and the inlet of the exhaust gas purification device. Since they are provided in corresponding lengths, the first inlet and the second inlet can be used in common in various types of work vehicles, and the buffer type pipe connector selects a product of an appropriate length according to the separation distance between the engine and the exhaust gas purification device. can be properly installed.

1 is a view showing the structure of the inlet of the exhaust gas purification apparatus according to the prior art.
2 is a view showing an exploded state of the injection hole shown in FIG.
3 and 4 are views showing the structure of the inlet of the exhaust gas purification apparatus according to an embodiment of the present invention.
5 is a view showing an exploded state of the injection hole shown in FIGS. 3 and 4 .
6 is a perspective view showing a first injection hole of the injection hole shown in FIG.
7 is a perspective view showing a second injection hole of the injection hole shown in FIG.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited or limited by the examples. Like reference numerals in each figure indicate like elements.

3 and 4 are views showing the structure of the inlet 200 of the exhaust gas purification apparatus 100 according to an embodiment of the present invention, and FIG. 5 is an exploded view of the inlet 200 shown in FIGS. 3 and 4 It is a diagram showing the state. 6 is a perspective view illustrating the first injection hole 210 of the injection hole 200 shown in FIG. 5 , and FIG. 7 is a perspective view illustrating the second injection hole 220 of the injection hole 200 illustrated in FIG. 5 .

3 and 4, the exhaust gas purification apparatus 100 according to an embodiment of the present invention, the DOC mixing module 110, the SCR module 120, the module connector 130 and the inlet 200 includes

Here, the DOC mixing module 110 purifies the exhaust gas (G) generated from the engine (not shown) of the vehicle for work with a diesel oxidation catalyst, and then mixes the reducing agent with the first purified gas purified by the diesel oxidation catalyst It is a device that produces mixed gas. For reference, the work vehicle may be provided as a work vehicle using a diesel engine, such as construction machinery, agricultural machinery, and heavy equipment. For example, as a work vehicle, a loader, an excavator, a tractor, and a crane are representative.

One end of the DOC mixing module 110 may be connected in communication with the module connector 130 , and the other end of the DOC mixing module 110 may be connected in communication with the exhaust port of the engine through the inlet 200 . Therefore, the exhaust gas (G) generated from the engine of the vehicle for work flows into the DOC mixing module 110 through the inlet 200, is processed in the DOC mixing module 110, and then through the module connector 130 to the SCR module It may be transferred to one end of 120 .

And, the SCR module 120 is a device for purifying the mixed gas discharged from the DOC mixing module 110 with a selective reduction catalyst and then discharging the second purified gas purified by the selective reduction catalyst to the outside. The SCR module 120 as described above may purify the exhaust gas by a selective catalytic reduction (SCR) method. That is, the SCR module 120 can change NO _X (nitrogen oxide) in the exhaust gas to nitrogen and water harmless to the human body by a catalytic reaction using urea.

One end of the SCR module 120 may be connected in communication with the module connection pipe 130 , and the other end of the SCR module 120 may be connected to an exhaust pipe 122 for discharging the exhaust gas G to the outside. Therefore, the mixed gas discharged from the DOC mixing module 110 flows into the SCR module 120 through the module connector 130, is processed in the SCR module 120, and then discharged to the outside through the exhaust pipe 122. have.

In addition, the module connector 130 is a tubular member that forms a passage for guiding gas from the DOC mixing module 110 to the SCR module 120 . The module connector 130 may be provided to communicate between the DOC mixing module 110 and the SCR module 120 to guide the mixed gas from the DOC mixing module 110 to the SCR module 120 . That is, one end of the module connector 130 may be connected to one end of the DOC mixing module 110 , and the other end of the module connector 130 may be connected to the other end of the SCR module 120 .

Hereinafter, in this embodiment, the DOC mixing module 110 and the SCR module 120 may be formed in a long cylindrical structure, but the present invention is not limited thereto. can be deformed. 1 and 2, the DOC mixing module 110 and the SCR module 120 of the present embodiment are arranged side by side at positions adjacent to each other, but at an appropriate angle corresponding to the shape of the installation space provided in the vehicle body. can be placed as For example, the DOC mixing module 110 and the SCR module 120 may be disposed side by side at positions spaced apart from each other in the vertical direction, and the module connector 130 is formed in a straight tube shape to form the DOC mixing module 110 . And it may be disposed in a structure directly connected to one end of the SCR module (120).

On the other hand, the inlet 200 is a tubular member for guiding the exhaust gas (G) discharged from the exhaust port of the engine into the interior of the exhaust gas purification device (100). One end of the inlet 200 may be connected in communication with the exhaust port of the engine, and the other end of the inlet 200 may be connected in communication with the inlet 112 of the exhaust gas purification apparatus 100 .

In fact, when the vehicle for work is operated, vibrations generated from the engine may be transmitted to the inlet 200 , or various vibrations and external shocks generated while the vehicle for work is driven and operated may be transmitted to the inlet 200 . At this time, since the engine and the exhaust gas purification device 100 have a structure connected through the inlet 200 , stress due to vibration and external impact may be concentrated in the inlet 200 , and thus the inlet 200 may be damaged. can be increased. In order to cope with this, the injection hole 200 of this embodiment is preferably provided in a structure capable of absorbing vibration and external shock stably and buffering it.

3 to 7 , the structure of the inlet 200 of the exhaust gas purification apparatus 100 according to an embodiment of the present invention includes a first inlet 210 , a second inlet 220 and a buffer type pipe connector. (230) may be included.

Here, the first inlet 210 may be connected to the exhaust port of the engine, the second inlet 220 may be connected to the inlet 112 of the exhaust gas purification device 100, and the buffer type pipe connector 230 is the first It may be connected between the first inlet 210 and the second inlet 220 . Therefore, the first inlet 210, the buffer type pipe connection member 230 and the second inlet 220 are exhaust gas purification in the engine to guide the exhaust gas (G) discharged from the engine to the exhaust gas purification device (100). They may be connected in communication with each other toward the device 100 .

3 to 6 , the first inlet 210 of the present embodiment may be provided to introduce the exhaust gas G discharged from the exhaust port of the engine. That is, one end of the first inlet 210 may be connected in communication with the exhaust port of the engine. A first hollow portion 210a through which the exhaust gas G passes may be formed to be hollow inside the first injection hole 210 as described above.

For example, the first inlet 210 may include a first mounting portion 212 mounted to an exhaust port of the engine, and a first connecting portion 214 connected to one end of the cushioning type pipe connector 230 . .

The first mounting part 212 may be provided at one end of the first inlet 210 , and the first connection part 214 may be provided at the other end of the first inlet 210 . The first mounting portion 212 and the first connecting portion 214 as described above may be formed as an integral casting product by a casting method.

Accordingly, the first inlet 210 of the present embodiment may be formed in a shorter length than the first inlet 22 shown in FIGS. 1 and 2 by being manufactured as an integrated structure through casting. Accordingly, the first injection hole 210 of the present embodiment may be formed in a relatively shorter length than the first injection hole 22 shown in FIGS. 1 and 2 and may be formed in a straight tube shape rather than a curved tube shape.

The first mounting portion 212 of the first inlet 210 as described above may be formed in a flange shape in close contact with the exhaust port of the engine. A plurality of fastening holes for fastening the fastening member along the circumference of the outer periphery of the first mounting part 212 may be formed to be spaced apart from each other. Therefore, the first inlet 210 has a structure in which the flange-shaped first mounting part 212 is integrally provided as compared with the first inlet 22 shown in FIGS. 1 and 2 , so shown in FIGS. 1 and 2 Since the flange portion 23 of the first inlet 22 is omitted, the number of parts can be reduced, and the welding operation of the flange portion 23 is also omitted so that the first inlet 210 can be manufactured more conveniently, and the flange portion ( 23), the existing problems caused by poor welding can also be solved in advance.

At least one of the first connection part 214 of the first inlet 210 or the second connection part 224 of the second inlet 220 to be described later has a sensor installation part 216 for installing the gas sensor 240 . may be provided integrally. The gas sensor 240 as described above is a sensor member for detecting the exhaust gas (G), whether the exhaust gas (G) is discharged, the component of the exhaust gas (G), the temperature of the exhaust gas (G), the exhaust gas ( It may be used to sense at least one of the flow rate of G) or the flow rate of the exhaust gas (G).

Hereinafter, in the present embodiment, for convenience of description, it will be described that the sensor installation part 216 is formed only on the first connection part 214 of the first injection hole 210 . The sensor installation unit 216 as described above may be integrally molded together with the first inlet 210 when the first inlet 210 is cast. Therefore, in this embodiment, the first connection part 214 of the first injection hole 210 secures the installation space of the sensor installation parts 28 and 29 like the first injection hole 22 shown in FIGS. 1 and 2 . There is no need to be formed long in order to do so, and therefore the first injection hole 210 may be formed to have a very short length compared to the first injection hole 22 shown in FIGS. 1 and 2 .

3 to 5 and 7 , the second inlet 220 of the present embodiment may be provided to supply the exhaust gas G into the exhaust gas purification apparatus 100 . That is, one end of the second inlet 220 may be connected in communication with the inlet 112 of the exhaust gas purification apparatus 100 . A first hollow portion 210a and a second hollow portion 220a for passing the exhaust gas G may be formed hollow inside the second injection hole 220 as described above.

For example, the second inlet 220 is a second mounting portion 222 mounted to the inlet 112 of the exhaust gas purification device 100 , and a second connected to the other end of the buffer type pipe connector 230 . A connector 224 may be included.

The second mounting part 222 may be provided at one end of the second inlet 220 , and the second connecting part 224 may be provided at the other end of the second inlet 220 . The second mounting portion 222 and the second connecting portion 224 as described above may be formed as an integral casting product by a casting method.

Accordingly, the second inlet 220 of this embodiment is manufactured as an integral structure through casting, similar to the first inlet 210, and thus more compactly shorter than the second inlet 24 shown in FIGS. 1 and 2 . can be formed with Accordingly, the second injection hole 220 of the present embodiment may be formed not only to have a relatively shorter length than the second injection hole 24 shown in FIGS. 1 and 2 but also to have a straight tube shape rather than a curved tube shape.

The second mounting portion 222 of the second inlet 220 as described above may be inserted into the inlet 112 of the exhaust gas purification device 100 and connected in an overlapping structure. A discharge pipe (not shown) for discharging the exhaust gas G inside the other end of the exhaust gas purification device 100 may be connected to the second mounting part 222 of the second inlet 220 .

3 to 5 , the buffer type pipe connection member 230 of this embodiment is a tubular connection member for guiding the exhaust gas G from the engine to the exhaust gas purification device 100 , but the engine and the exhaust gas It is a buffer member for absorbing vibrations and external shocks generated between the purification device 100 . A passage for guiding the exhaust gas (G) from the first inlet 210 to the second inlet 220 is formed in the buffer-type pipe connector 230, and the first hollow portion ( 210a) and the second hollow portion 220a of the second injection hole 220 may be connected.

That is, one end of the buffer-type pipe connection member 230 may be connected in communication with the first connection part 214 of the first inlet 210 , and the other end of the buffer-type pipe connection member 230 is the second injection port 220 . It may be connected in communication with the second connection part 224 .

Here, the buffer type pipe connection member 230 may be formed of a material having higher flexibility and elasticity than the first inlet 210 and the second inlet 220 . For example, the first and second injection holes 200 may be formed of a castable metal material such as iron, and the buffer type pipe connection material 230 is formed of a rubber material or a plastic material, or a metal material having excellent flexibility and elasticity. can be formed. The shock-absorbing pipe connector 230 as described above can absorb and buffer vibrations and external shocks stably while deforming according to the vibrations and external shocks provided to the inlet 200, and prevent damage caused by vibrations and external shocks. This can increase the lifespan and stability of use.

And, the buffer type pipe connection member 230 may be formed in various structures for absorbing vibration and external shock. As an example, the buffer type pipe connection member 230 may be provided in the shape of a bellows pipe for smoothly absorbing and buffering vibrations and external shocks. That is, the buffer-type pipe connection member 230 can be buffered by absorbing vibrations and external shocks while changing the length or bending in various directions due to vibrations and external shocks. However, the present invention is not limited thereto, and various structures for the buffer type pipe connection member 230 to absorb vibration and external shock are applicable.

In addition, the first connection portion 214 of the first injection hole 210 and the second connection portion 224 of the second injection hole 220 may extend in a straight line toward each other. At this time, the buffer type pipe connector 230 may be disposed between the first injection hole 210 and the second injection hole 220 in a straight line shape along the length direction of the first and second injection holes 200 . Therefore, the inlet 200 is provided in a straight line from the outlet of the engine toward the inlet 112 of the exhaust gas purification device 100 so that the flow performance of the exhaust gas G can be improved, and the entire inlet 200 is Since the structure is simple, design convenience and installation workability may be improved.

In addition, the buffer type pipe connector 230 may be provided to be longer than the entire length of the first inlet 210 and the second inlet 220 . Therefore, in the present embodiment, as the length of the buffer type pipe connector 230 increases, the vibration and external shock applied to the injection hole 200 can be more smoothly absorbed and buffered. As an example, the conventional bellows pipe 26 shown in FIGS. 1 and 2 is disposed with a length of about 70 mm, but the buffer type pipe connector 230 of this embodiment is the inlet 20 of FIGS. 1 and 2 and It can be arranged with a length of about 150 mm in the same installation environment.

In addition, the length of the first inlet 210 and the second inlet 220 may be provided at a constant length irrespective of the separation distance between the engine and the exhaust gas purification device 100 , and the length of the buffer type pipe connector 230 . may be provided with a length corresponding to the separation distance between the engine and the exhaust gas purification device 100 . Therefore, the first inlet 210 and the second inlet 220 of this embodiment may be commonly used in various types of work vehicles, and the buffer type pipe connector 230 of this embodiment is a plurality according to the length. It can be prepared in advance and selectively employed in a work vehicle. That is, in this embodiment, common use of parts for the injection hole 200 and improvement of maintenance convenience can be expected.

On the other hand, it is preferable to form the buffer type pipe connector 230 in the shape of a double pipe. For example, the inner tube of the buffer-type tube connector 230 is a circular tube connected in communication with the first hollow portion 210a of the first inlet 210 and the second hollow portion 220a of the second inlet 220 . It may be formed in a shape, and the outer tube of the buffer-type tube connector 230 may be formed in the shape of a bellows tube surrounding the outer periphery of the inner tube. The inner tube of the buffer type tube connector 230 is inserted into the first connector 214 of the first inlet 210 and the second connector 224 of the second inlet 220 to be connected to each other in an overlapping structure, bent It may be made of a material having high flexibility. The outer tube of the buffer-type tube connector 230 is connected to the first connector 214 of the first inlet 210 and the second connector 224 of the second inlet 220 using a clamp member, It may be provided in the form of a corrugated pipe of any possible material.

The operation and effects of the structure of the inlet 200 of the exhaust gas purification apparatus 100 according to an embodiment of the present invention configured as described above are as follows.

First, the first inlet 210 and the second inlet 220 are manufactured as an integrated casting product by a casting method.

The first mounting portion 212 of the first inlet 210 is fixed to the exhaust port of the engine with a fastening member, and the second mounting portion 222 of the second inlet 220 is connected to the inlet 112 of the exhaust gas purification device 100. connected in communication with

When the installation of the first inlet 210 and the second inlet 220 is completed as described above, one end of the buffer type pipe connector 230 is connected to the first connector 214 of the first inlet 210, and the buffer The other end of the type tube connector 230 is connected to the second connector 224 of the second inlet 220 .

Therefore, the buffer type pipe connector 230 is selected and installed with a length corresponding to the separation distance between the first inlet 210 and the second inlet 220 , but between the first inlet 210 and the second inlet 220 . placed in a straight line on the

In particular, since the first inlet 210 and the second inlet 220 are formed in a compact and integral shape with a short length, the length of the buffer-type pipe connector 230 can be further increased, and accordingly, the buffer-type pipe connector ( 230), it is possible to further increase the buffering efficiency of vibration and external shock.

For reference, the gas sensor 240 is installed in the sensor installation part 216 of the first inlet 210 .

As described above, when the vehicle for work is operated while the inlet 200 is installed in the engine and the exhaust gas purification device 100 , various types of vibrations and external shocks are continuously transmitted to the inlet 200 .

However, since the buffer type pipe connector 230 is deformed and the vibration and external shock transmitted to the injection hole 200 are absorbed and buffered, the damage to the entire injection hole 200 can be reduced, and vibration and external shocks can be reduced. By smoothly preventing damage to the injection hole 200 by the injection hole 200, the lifespan of the injection hole 200 can be significantly increased.

In particular, by arranging the length of the buffer-type pipe connection member 230 to the maximum, it is possible to increase the deformation limit of the buffer-type pipe connection member 230 to prevent damage due to vibration and external impact, and the engine and exhaust gas purification device 100 of the layout structure can be designed more freely.

As described above, in the embodiment of the present invention, specific matters such as specific components, etc., and limited embodiments and drawings have been described, but these are only provided to help a more general understanding of the present invention, and the present invention is limited to the above embodiments Various modifications and variations are possible from these descriptions by those of ordinary skill in the art to which the present invention pertains. Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims described below, but also all of the claims and equivalents or equivalent modifications will fall within the scope of the spirit of the present invention.

100: exhaust gas purification device
110: DOC mixing module
120: SCR module
130: modular connector
200: inlet
210: first inlet
212: first mounting part
214: first connection part
220: second inlet
222: second mounting portion
224: second connection part
230: buffer type pipe connector

Claims (7)

As an inlet structure of an exhaust gas purification device for guiding exhaust gas discharged from the engine of a vehicle for work into the interior of the exhaust gas purification device,
a first inlet having one end connected to an outlet of the engine to introduce the exhaust gas discharged from the engine;
a second inlet having one end connected to the inlet of the exhaust gas purification device to supply the exhaust gas into the exhaust gas purification device; and
Both ends are connected to the other ends of the first inlet and the second inlet to guide the exhaust gas from the first inlet to the second inlet, and vibration generated between the engine and the exhaust gas purification device and the external Including a shock-absorbing buffer-type pipe connector;
Exhaust gas, characterized in that the buffer type pipe connector is formed of a material having a higher flexibility and elasticity than the first inlet and the second inlet, and is provided longer than the entire length of the first inlet and the second inlet. The structure of the inlet of the purifier. According to claim 1,
The first inlet may include: a first mounting part provided at one end of the first inlet and mounted on the exhaust port of the engine; and a first connector provided at the other end of the first inlet and connected to one end of the buffer-type pipe connector.
The inlet structure of the exhaust gas purification device, characterized in that the first mounting portion and the first connection portion is formed as an integral casting product by a casting method. According to claim 1,
The second inlet may include a second mounting part provided at one end of the second inlet and mounted on the inlet of the exhaust gas purification device; and a second connector provided at the other end of the second inlet and connected to the other end of the buffer type pipe connector.
The inlet structure of the exhaust gas purification device, characterized in that the second mounting portion and the second connection portion is formed as an integral casting product by a casting method. 4. The method of claim 2 or 3,
At least one of the first connection part and the second connection part is provided with a sensor installation unit integrally,
The inlet structure of the exhaust gas purification device, characterized in that the sensor installation unit is provided with a gas sensor for detecting the exhaust gas passing through the first inlet or the second inlet. According to claim 1,
The inlet structure of the exhaust gas purification device, characterized in that the buffer type pipe connector is provided in the shape of a bellows pipe for absorbing vibration and external shock. 6. The method of claim 5,
The first inlet and the second inlet extend in a straight line toward each other,
The buffer type pipe connector is disposed between the first inlet and the second inlet in a straight line shape along the longitudinal direction of the first and second inlet inlet structure of the exhaust gas purification device, characterized in that. 7. The method of claim 6,
The axial length of the first inlet and the second inlet are provided to be constant,
The inlet structure of the exhaust gas purification device, characterized in that the axial length of the buffer type pipe connector is provided with a length corresponding to the separation distance between the engine and the exhaust gas purification device.

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