CN110685781A - A tail gas treatment device - Google Patents

Abstract

The invention belongs to the technical field of engines, and discloses an exhaust gas treatment device, comprising a casing, the casing includes a first casing and a second casing, the first casing is provided with an air inlet hole, and the second casing is provided with an exhaust hole; a partition plate, the first shell is connected to one side of the partition plate, and a first cavity is arranged between the first shell and the partition plate; the second shell is connected to the other side of the partition plate, the second A second cavity is arranged between the casing and the partition plate, and a flow port is opened on the partition plate, and the flow port connects the air inlet hole and the exhaust hole; the purification component is installed at the flow port, which is used for the circulation The exhaust gas flowing through the port is purified and guided; the exhaust assembly, the exhaust assembly includes a guide pipe, and the guide pipe is installed at the exhaust hole and located in the second cavity, which can guide the exhaust gas in the second cavity from the exhaust hole. discharge. Through the above structure, the exhaust gas of the exhaust gas treatment device is smooth and the resistance is small, which is beneficial to reduce the pressure drop and noise of the entire exhaust gas treatment device.

Description

A tail gas treatment device

technical field

The invention relates to the technical field of engines, in particular to an exhaust gas treatment device.

Background technique

With the continuous enhancement of people's awareness of environmental protection, in recent years, the impact of waste gas emitted by non-road mobile machinery on the environment has attracted more and more attention from various countries, and many countries have formulated corresponding emission standards. At present, small general-purpose engines are widely used in non-road construction machinery. In order to make them meet the corresponding emission standards, the technical solution of installing an exhaust gas treatment device on the engine is usually adopted.

However, in the current exhaust gas treatment device, the exhaust mechanism is usually only the exhaust hole directly opened on the bottom plate, and the direction of the exhaust hole is quite different from the flow direction of the exhaust gas in the exhaust gas treatment device. The size of the exhaust hole is small, so that the exhaust gas treated by the exhaust gas treatment device has a large resistance during the discharge process, and the exhaust is not smooth, which not only makes the exhaust gas flow back in the exhaust gas treatment device, resulting in uneven heat dissipation, but also It will also lead to a large pressure drop of the entire exhaust gas treatment device, which not only makes the noise generated by it larger, but also increases the fuel consumption of the engine to a certain extent.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an exhaust gas treatment device, the exhaust gas treatment device of the exhaust gas treatment device is smooth and the resistance is small, which is beneficial to reduce the pressure drop and noise of the entire exhaust gas treatment device.

For this purpose, the present invention adopts the following technical solutions:

An exhaust gas treatment device, comprising:

a casing, the casing includes a first casing and a second casing, the first casing is provided with an air inlet hole, and the second casing is provided with an exhaust hole;

a partition plate, the first shell is connected to one side of the partition plate, a first cavity is arranged between the first shell and the partition plate; the second shell is connected to the partition plate On the other side of the plate, a second cavity is arranged between the second shell and the partition plate, and a flow port is opened on the partition plate, and the flow hole connects the air inlet hole and the exhaust plate. stomatal connection;

a purification assembly, which is installed at the flow port and used to purify and guide the exhaust gas flowing through the flow port;

an exhaust assembly, the exhaust assembly includes a guide pipe, the guide pipe is installed at the exhaust hole and located in the second cavity, and can guide the exhaust gas in the second cavity from the exhaust hole discharge.

Preferably, the vent hole is configured in a semicircle.

Preferably, the exhaust assembly further comprises a guide port, the guide port is configured as a quarter sphere, the diameter of the guide port is equal to that of the exhaust hole, and the guide port is installed on the The exhaust hole is located on the side away from the guide pipe.

Preferably, the purification assembly includes a carrier bracket, the carrier bracket contains a catalyst carrier, the carrier bracket is connected to the flow port and is located in the first cavity.

Preferably, the openings at both ends of the carrier support and the flow port are square in shape, and have the same side lengths.

Preferably, the purification assembly further includes a baffle plate, the baffle plate is connected to the flow port and is located in the second cavity.

Preferably, a plurality of first ventilation holes are provided on the guide plate.

Preferably, the cross-sectional shape of the inlet of the guide tube is a semicircle.

Preferably, a plurality of second ventilation holes are provided on the wall of the guide tube.

Preferably, it also includes a connection component, the connection component includes a connection pin, the connection pin is penetrated on the partition plate, one end of the connection pin is connected to the first housing, and the other end of the connection pin is connected to the first housing. One end is connected to the second casing.

Beneficial effects of the present invention:

The present invention provides an exhaust gas treatment device. The exhaust gas treatment device is provided with a purification component and an exhaust gas component, wherein the purification component is installed at a flow port in the exhaust gas treatment device, and can catalyze the exhaust gas flowing therethrough, so as to realize the control of the exhaust gas. Purification of exhaust gas; the exhaust assembly includes a guide pipe installed at the exhaust hole, and the guide pipe can guide the exhaust gas in the second cavity to be smoothly discharged from the exhaust hole, which not only reduces the amount of exhaust gas in the exhaust gas treatment device The backflow in the exhaust gas also reduces the resistance of the exhaust gas during the discharge process, so that the exhaust gas is smoother, and the pressure drop and noise of the exhaust gas treatment device are reduced.

Description of drawings

1 is a left side view of an exhaust gas treatment device provided by a specific embodiment of the present invention;

2 is a schematic diagram of an explosion structure of a tail gas treatment device provided by a specific embodiment of the present invention;

FIG. 3 is a bottom view of the exhaust gas treatment device provided by the specific embodiment of the present invention.

In the picture:

1. Housing; 11. First housing; 111. Air intake hole; 12. Second housing; 121. Exhaust hole;

2. Partition; 21. First cavity; 22. Second cavity; 23. Flow port;

3. Purification assembly; 31. Carrier bracket; 32. Air deflector; 321. First ventilation hole;

4. Exhaust assembly; 41, guide pipe; 411, second vent hole; 42, guide port;

5. Connecting components; 51. Connecting pins; 52. Inlet flange.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

The present invention provides an exhaust gas treatment device. As shown in FIG. 1 , the exhaust gas treatment device includes a casing 1 , a partition plate 2 , a purification component 3 , an exhaust component 4 and a connecting component 5 . The partition plate 2 is connected to the shell through the connecting component 5 . The body 1 is connected, the purification assembly 3 is installed on the partition plate 2 , and the exhaust assembly 4 is installed on the casing 1 . The casing 1 includes a first casing 11 and a second casing 12. The first casing 11 is provided with an air intake hole 111, and the second casing 12 is provided with an exhaust hole 121. The air intake hole 111 communicates with the The exhaust port of the cylinder is used to connect the exhaust gas generated by the engine into the exhaust gas treatment device. One side of the partition plate 2 is connected to the first shell 11, and the other side is connected to the second shell 12. A first cavity 21 is provided between the partition plate 2 and the first shell 11. A second cavity 22 is disposed between the housings 12 , the first cavity 21 is communicated with the air intake hole 111 , and the second cavity 22 is communicated with the exhaust hole 121 . The baffle 2 is provided with a flow port 23, and the first cavity 21 and the second cavity 22 are communicated through the flow port 23, so that the intake hole 111 and the exhaust hole 121 can be communicated, so that the exhaust gas discharged from the exhaust port of the cylinder is The exhaust gas treatment device can be discharged through the air intake hole 111 , the first cavity 21 , the flow port 23 , the second cavity 22 and the exhaust hole 121 in sequence.

In addition, the purification assembly 3 is installed at the flow port 23, which can not only catalyze the exhaust gas flowing through the flow port 23 to realize the purification of the exhaust gas, but also guide the exhaust gas to smoothly enter the flow port 23 from the first cavity 21, and guide the exhaust gas from the first cavity 21 to enter the flow port 23 smoothly. The exhaust gas flowing out of the flow port 23 smoothly enters the second cavity 22, which reduces the resistance of the exhaust gas flowing through the flow port 23, and makes the exhaust gas flow smoothly. The exhaust assembly 4 is installed at the exhaust hole 121, which can guide the exhaust gas in the second cavity 22 to be smoothly discharged from the exhaust hole 121, which can not only reduce the backflow of the exhaust gas in the exhaust gas treatment device, but also reduce the exhaust gas in the exhaust gas treatment device. The resistance received by the small exhaust gas during the discharge process makes the exhaust more smooth, which is beneficial to reduce the pressure drop and noise of the exhaust gas treatment device.

In this embodiment, the purification assembly 3 includes a carrier bracket 31 and a guide plate 32. One end of the carrier bracket 31 is openly mounted on the flow port 23 and contains a catalyst carrier inside. The carrier bracket 31 is located in the first cavity 21, and guides the The flow plate 32 is also installed on the flow port 23 and located in the second cavity 22 . As shown in FIG. 2 , preferably, the shape of the flow port 23 is set to be square, which is convenient for processing the flow port 23 on the separator 2 . More preferably, both ends of the carrier support 31 have the same openings and are set to be square, and the side length of the opening of the carrier support 31 is equal to the side length of the flow port 23, so that the exhaust gas entering the carrier support 31 can flow to the flow port 23 uniformly, All the catalyst carriers in the carrier support 31 can participate in the catalytic reaction with the exhaust gas, which not only helps to improve the utilization rate of the catalyst carriers, but also helps to improve the exhaust gas treatment efficiency of the exhaust gas treatment device.

Preferably, the outlet direction of the deflector 32 faces the direction of the exhaust hole 121 , so that the exhaust gas discharged from the deflector 32 can be discharged more smoothly. More preferably, the deflector 32 is provided with a plurality of first ventilation holes 321, so that the exhaust gas can be discharged from the first ventilation holes 321, which is beneficial for the exhaust gas to quickly fill the second cavity 22, and is not only conducive to reducing the size of the exhaust gas. The pressure drop is also favorable for the heat dissipation of the exhaust gas in the second cavity 22, and the arrangement of the plurality of first ventilation holes 321 can also reduce the noise of the exhaust gas.

As shown in FIGS. 2 and 3 , in this embodiment, the exhaust assembly 4 includes a guide pipe 41 and a guide port 42 . The guide pipe 41 is installed on the exhaust hole 121 and located in the second cavity 22 , and the guide port 42 is installed on the exhaust hole 121 and is located on a side away from the guide pipe 41 . Preferably, the exhaust hole 121 is set in a semi-circular shape, which not only facilitates the smooth discharge of the exhaust gas, but also reduces the noise generated when the exhaust gas is discharged from the exhaust hole 121 . More preferably, a plurality of exhaust holes 121 are provided, and the plurality of exhaust holes 121 are evenly spaced, which is beneficial to increase the speed of exhaust gas discharge. In this embodiment, the guide pipe 41 is set as a semi-circular pipe, the guide pipe 41 is covered on the plurality of exhaust holes 121, and both ends of the semi-circular pipe are semi-circular inlets and communicate with the exhaust holes 121, so that The exhaust gas in the second cavity 22 can enter the guide pipe 41 from the inlets at both ends of the guide pipe 41 and be discharged from the exhaust hole 121 , which can suppress the noise generated when the exhaust gas is discharged from the exhaust hole 121 , which is beneficial to The noise of the exhaust gas treatment device is reduced. Preferably, a plurality of second ventilation holes 411 are provided on the pipe wall of the guide pipe 41, so that the exhaust gas in the second cavity 22 can also enter the guide pipe 41 from the second ventilation holes 411, which is not only beneficial to reduce this The pressure drop at the place, but also has the effect of reducing noise.

In this embodiment, the guide port 42 is set as a quarter sphere, and the diameter of the guide port 42 is equal to the diameter of the exhaust hole 121 , so that the guide port 42 can be fitted on the exhaust hole 121 , which is beneficial to suppress the noise generated when the exhaust hole 121 is exhausted, and reduce the noise of the exhaust gas treatment device.

In this embodiment, the connection assembly 5 includes an inlet flange 52 and a connection pin 51 . The inlet flange 52 is installed at the air inlet hole 111 and is fixedly connected to the first housing 11 , and the connection pin 51 penetrates through the partition plate 2 . One end of the connecting pin 51 is connected to the inlet flange 52 , and the other end is connected to the second casing 12 to connect the first casing 11 , the partition plate 2 and the second casing 12 . Preferably, the size of the inlet of the inlet flange 52 is equal to the size of the intake hole 111, and is set to be equal to the size of the exhaust port of the engine cylinder, which is beneficial to reduce the speed of the exhaust gas entering the exhaust gas treatment device from the exhaust port of the cylinder, not only The impact of the exhaust gas on the partition 2 can be reduced, and it is also beneficial for the exhaust gas to diffuse and fill the first cavity 21, which is beneficial to the heat dissipation of the exhaust gas, and at the same time, the pressure drop of the exhaust gas treatment device can be reduced. More preferably, the inlet flange 52 is welded at the air inlet hole 111 of the first casing 11 and disposed in the first cavity 21 , which is beneficial to enhance the connection strength between the connecting assembly 5 and the casing 1 .

It can be understood that the exhaust gas treatment device provided by the present invention can not only be used for the exhaust gas treatment of small general-purpose engines, but also can be used in the exhaust gas treatment of other types of engines. The backflow in the exhaust gas treatment device makes the resistance of the exhaust gas smaller, which is beneficial to reduce the pressure drop and noise of the entire exhaust gas treatment device.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. There is no need and cannot be exhaustive of all implementations here. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. An exhaust gas treatment device, comprising:

the air conditioner comprises a shell (1), wherein the shell (1) comprises a first shell (11) and a second shell (12), an air inlet hole (111) is formed in the first shell (11), and an air outlet hole (121) is formed in the second shell (12);

the first shell (11) is connected to one side of the partition plate (2), and a first cavity (21) is arranged between the first shell (11) and the partition plate (2); the second shell (12) is connected to the other side of the partition plate (2), a second cavity (22) is arranged between the second shell (12) and the partition plate (2), a circulating port (23) is formed in the partition plate (2), and the air inlet (111) is communicated with the air outlet (121) through the circulating port (23);

a purification assembly (3), wherein the purification assembly (3) is arranged at the through-flow opening (23) and is used for purifying and guiding the exhaust gas flowing through the through-flow opening (23);

the exhaust assembly (4), the exhaust assembly (4) includes honeycomb duct (41), honeycomb duct (41) install in exhaust hole (121) department and be located in second cavity (22), can guide tail gas in the second cavity (22) is followed exhaust hole (121) are discharged.

2. The exhaust gas treatment device according to claim 1, wherein the exhaust holes (121) are configured in a semi-circle.

3. The exhaust gas treatment device according to claim 2, wherein the exhaust assembly (4) further comprises a diversion opening (42), the diversion opening (42) is configured in a shape of a quarter sphere, the diversion opening (42) has a diameter equal to that of the exhaust hole (121), and the diversion opening (42) is mounted on the exhaust hole (121) on a side away from the diversion pipe (41).

4. The exhaust gas treatment device according to claim 1, characterized in that the purification assembly (3) comprises a carrier support (31), the carrier support (31) containing a catalyst carrier, the carrier support (31) being connected to the flow opening (23) and located in the first cavity (21).

5. The exhaust gas treatment device according to claim 4, characterized in that the openings at both ends of the carrier support (31) and the flow opening (23) are square in shape and have equal sides.

6. The exhaust gas treatment device according to claim 1, characterized in that the purification assembly (3) further comprises a baffle plate (32), the baffle plate (32) being connected to the through-flow opening (23) and being located within the second cavity (22).

7. The exhaust gas treatment device according to claim 6, wherein the baffle plate (32) is provided with a plurality of first vent holes (321).

8. The exhaust gas treatment device according to any one of claims 1 to 7, wherein the inlet of the draft tube (41) has a semicircular cross-sectional shape.

9. The exhaust gas treatment device according to any one of claims 1 to 7, wherein the wall of the draft tube (41) is provided with a plurality of second vent holes (411).

10. The exhaust gas treatment device according to any one of claims 1 to 7, further comprising a connecting assembly (5), wherein the connecting assembly (5) comprises a connecting pin (51), the connecting pin (51) is disposed on the partition plate (2) in a penetrating manner, one end of the connecting pin (51) is connected to the first housing (11), and the other end of the connecting pin (51) is connected to the second housing (12).

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