CN215292636U

CN215292636U - Exhaust pipe built-in silencing catalyst pipe for heavy locomotive and exhaust pipe with same

Info

Publication number: CN215292636U
Application number: CN202120088162.0U
Authority: CN
Inventors: 王煌荧
Original assignee: Individual
Current assignee: Chen Hongxin
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-12-24
Anticipated expiration: 2031-01-14

Abstract

The utility model discloses a built-in amortization catalyst pipe of heavy locomotive blast pipe, include: a surrounding wall parallel to the direction of said exhaust pipe, having an inner side, an outer side and a diameter smaller than the diameter of said exhaust pipe, wherein one end of said surrounding wall is rolled toward said inner side to form a radially tapered portion axially symmetric to the center axis of said exhaust pipe and a closing portion perpendicular to the direction of said exhaust pipe for closing one end of said surrounding wall, the cross section of said radially tapered portion perpendicular to the center axis of said exhaust pipe is radially tapered near said closing portion end, and said radially tapered portion has a plurality of holes penetrating the inner side of said surrounding wall and the outer side of said surrounding wall; and a catalyst contact member disposed inside the surrounding wall away from the end of the sealing member, the surface of which is attached with a catalyst for completely burning the exhaust gas and reducing the noise. Furthermore, the utility model also discloses an blast pipe of built-in amortization catalyst pipe of heavy locomotive blast pipe has.

Description

Exhaust pipe built-in silencing catalyst pipe for heavy locomotive and exhaust pipe with same

Technical Field

The utility model relates to a catalyst converter especially relates to a catalyst converter who has the environmental protection simultaneously and fall the function of making an uproar to can directly put into the blast pipe of standard bore and use.

Background

In modern times of environmental awareness, people pay more and more attention to the pollution of exhaust gas and noise emitted by automobiles and locomotives, and do not want to sacrifice their quality of life, so that the government has stricter regulations in response to the requirements, and especially the exhaust pipe of the automobiles and locomotives, which is the main exhaust gas and noise source, is the key item of inspection. The exhaust pipe is connected with the exhaust hole of the cylinder, and is an outlet of exhaust gas generated by the operation of the engine, meanwhile, the exhaust gas can flow, resonate and the like in the exhaust pipe, and great noise is generated, so that the exhaust pipe is the last defense line in order to control the noise and reduce harmful exhaust pollution.

Because the engine operation depends on the reciprocating motion of the piston, the generated waste gas can form a dilatational wave, namely a group of air groups with higher and lower density and staggered distribution, and once the wavelength is just in the human auditory range, noise can be formed; when the air mass is limited by the exhaust pipe, the exhaust gas in the exhaust pipe presents different pressure distribution, and the pressure can influence the operation of the piston back. If the air mass interval is proper, the middle negative pressure can naturally attract the next air mass, so that the exhaust is smooth, and the engine can operate fully. When the back pressure is insufficient, the distance between the air masses is far, so that the front air mass cannot attract the rear air mass, the exhaust is not smooth, and the exhaust pipe is too unobstructed; when the back pressure is too high, the air mass is closer to each other, so that the front air mass blocks the rear air mass from advancing, and the rotating speed of the engine is prevented from rising, namely the exhaust pipe is blocked. Generally speaking, too low back pressure will affect low speed, i.e. vehicle start, while too high back pressure will limit engine speed and reduce vehicle horsepower.

The exhaust pipe is generally divided into a front section, a middle section and a tail section, wherein the front section is directly connected with an exhaust hole of the cylinder; the middle section is usually provided with a catalytic converter for completely burning the exhaust gas; the tail section has the functions of exhausting and silencing, and is a part for coating silencing cotton and a most obvious part of the exhaust pipe. Since the entire exhaust pipe is still a continuous pipe, the modification of any one of the front, middle or rear sections will affect the overall performance and noise, and the design of the structure of each section of the exhaust pipe cannot ignore the effect on the other sections.

The catalytic converter mentioned in the previous paragraph catalyzes harmful exhaust gases, such as hydrocarbons, carbon monoxide and nitrogen oxides, to be completely combusted by using precious metals such as platinum, rhodium and palladium as catalysts, so as to reduce harmful components in the exhaust gases to the human body and reduce the pollution to the environment. The catalytic converter is installed in the exhaust pipe through which the exhaust gas must pass, so as to ensure that most of the exhaust gas passes through the catalytic converter for filtration, and the structure of the catalytic converter is usually in a net shape in order to increase the contact area. However, the catalytic converter inevitably obstructs the airflow, resulting in an irregular exhaust emission and a back pressure, so that the structure and the placement position of the catalytic converter will affect the engine speed and the horsepower.

In order to comply with the regulations for exhaust gas and noise control in the car industry, a structure for obstructing the air flow and a catalytic converter are usually added to the design of the exhaust pipe, so that the back pressure is increased and part of the horsepower is sacrificed. As shown in fig. 7, the exhaust pipe of the original factory is often constructed in a complex structure with a plurality of partition plates 71 at the middle and rear sections of the exhaust pipe 7, and a large amount of silencing cotton is used to force the exhaust gas 8 to go back and forth at the middle and rear sections, so as to reduce noise decibels. Of course, the above configuration obviously creates significant back pressure, which makes the locomotive less able to achieve the horsepower that the engine could otherwise have. For vehicle owners, such as common heavy-duty vehicle refitting, in pursuit of improved vehicle performance, the refitting often starts with the exhaust pipe which is easiest to replace, and in particular, reduces airflow obstruction at the tail section of the exhaust pipe, in pursuit of speed improvement, generation of pleasant sound waves, and appearance of generous air. However, since the refitted vehicle still needs to meet the requirements of the regulations, how to treat the exhaust gas and reduce the noise most efficiently under the condition of not limiting the horsepower as much as possible is the problem to be solved by the present invention.

SUMMERY OF THE UTILITY MODEL

To the above insufficiency of the prior art, according to the embodiment of the utility model, it is hoped to provide a built-in amortization catalyst pipe of heavy locomotive blast pipe, aims at realizing following mesh: (1) meanwhile, the environment-friendly noise reduction device has the functions of environmental protection and noise reduction; (2) the exhaust pipe with a proper caliber can be directly placed for use, so that the installation is simple and convenient, and the use friendliness is improved; (3) by means of a simple structural design, the exhaust pipe cannot generate excessive back pressure to reduce the horsepower of the engine, the yield and the reliability of the product are improved, and the cost is greatly reduced; (4) the complicated design of the middle section of the exhaust pipe is replaced, the length of the exhaust pipe is reduced, and the tail section of the exhaust pipe can meet the regulations and has more refitting elasticity. In addition, it is desirable to provide an exhaust pipe having a muffler catalyst tube built-in to a heavy duty vehicle exhaust pipe that provides a more efficient alternative to boosting horsepower through a retrofit exhaust pipe.

According to the embodiment, the utility model provides a pair of built-in amortization catalyst pipe of heavy locomotive blast pipe, include: a surrounding wall parallel to the direction of said exhaust pipe, having an inner side, an outer side and a diameter smaller than the diameter of said exhaust pipe, wherein one end of said surrounding wall is rolled toward said inner side to form a radially tapered portion axially symmetric to the center axis of said exhaust pipe and a closing portion perpendicular to the direction of said exhaust pipe for closing one end of said surrounding wall, the cross section of said radially tapered portion perpendicular to the center axis of said exhaust pipe is radially tapered near said closing portion end, and said radially tapered portion has a plurality of holes penetrating the inner side of said surrounding wall and the outer side of said surrounding wall; and a catalyst contact member disposed inside the surrounding wall away from the end of the sealing member, the surface of which is attached with a catalyst for completely burning the exhaust gas and reducing the noise.

According to the embodiment, the utility model provides a pair of blast pipe with built-in amortization catalyst pipe of heavy locomotive blast pipe supplies to discharge and handles the waste gas and the noise that the cylinder of a heavy locomotive discharged, include:

an exhaust pipe front section for connecting the cylinder;

an exhaust pipe tail section connected to the exhaust pipe front section and having an exhaust outlet for exhausting the exhaust gas and assisting in reducing the noise; and

a muffler catalyst tube installed in the exhaust pipe of a heavy-duty vehicle between the front section and the tail section of the exhaust pipe, away from the outlet end of the exhaust pipe, and comprising:

a surrounding wall parallel to the direction of said exhaust pipe, having an inner side, an outer side and a diameter smaller than the diameter of said exhaust pipe, wherein one end of said surrounding wall is rolled toward said inner side to form a radially tapered portion axially symmetric to the center axis of said exhaust pipe and a closing portion perpendicular to the direction of said exhaust pipe for closing one end of said surrounding wall, the cross section of said radially tapered portion perpendicular to the center axis of said exhaust pipe is radially tapered near said closing portion end, and said radially tapered portion has a plurality of holes penetrating the inner side of said surrounding wall and the outer side of said surrounding wall; and

a catalyst contact piece arranged on the inner side of the surrounding wall far away from the end of the closed part, and a catalyst is attached to the surface of the catalyst contact piece for completely burning the waste gas and reducing the noise.

The utility model discloses borrow by above-mentioned design, when complying with the regulation and reducing waste gas and noise, utilize simple and reliable structure to provide the built-in catalyst converter of blast pipe of more efficient, replace the complicated part that just hinders in engine horsepower promotion of tail section in the blast pipe of former factory, let the engine can exert real strength.

Drawings

FIG. 1 is a perspective view of a first preferred embodiment of the present invention.

FIG. 2 is a schematic side sectional view of a first preferred embodiment of the present invention.

FIG. 3 is a schematic top view of a first preferred embodiment of the present invention.

FIG. 4 is a schematic bottom view of a first preferred embodiment of the built-in silencing catalyst tube of the present invention.

FIG. 5 is an assembly diagram of a second preferred embodiment of the exhaust pipe with the muffler catalyst tube built in the exhaust pipe of heavy duty motorcycle of the present invention.

FIG. 6 is a schematic side-by-side view of a second preferred embodiment of the exhaust pipe with the muffler catalyst tube built in the exhaust pipe of a heavy duty vehicle according to the present invention.

Fig. 7 is a schematic diagram of a tail section partition structure of a factory exhaust pipe and an exhaust gas flow direction in the prior art.

Wherein: 1. 1' is a surrounding wall; 10 is the caliber; 11 is a radial tapered portion; 111 is a hole; 12 is a sealing part; 13 is a barrier sheet; 2 is a catalyst contact element; 3' is the tail section of the exhaust pipe; 4' is the front section of the exhaust pipe; 6. 7 is an exhaust pipe; 71 is a clapboard; 8 is exhaust gas.

Detailed Description

The invention will be further elucidated with reference to the drawings and the embodiments. These examples are to be understood as merely illustrative of the present invention and not as limiting the scope of the invention. After reading the description of the present invention, those skilled in the art can make various changes and modifications to the present invention, and these equivalent changes and modifications also fall within the scope of the present invention defined by the claims.

First preferred embodiment

As shown in fig. 1 to 4, a first preferred embodiment of the present invention provides a built-in silencing catalyst tube for heavy-duty locomotive exhaust pipe, which is formed by surrounding a surrounding wall 1 of a parallel exhaust pipe 6 for being placed in the exhaust pipe 6 to treat the exhaust gas and noise emitted from the cylinder, so that the diameter 10 of the surrounding wall 1 is smaller than the diameter of the exhaust pipe 6. The surrounding wall 1 has an inner side and an outer side, wherein one end of the surrounding wall 1 is rolled toward the inner side to form a radial tapered portion 11 axially symmetric to the central axis of the exhaust pipe 6 and a closed portion 12 perpendicular to the direction of the exhaust pipe 6. The cross section of the radial tapered portion 11 perpendicular to the central axis of the exhaust pipe 6 is thus radially tapered along the end near the closing portion 12 until the closing portion 12 closes the opening at one end of the surrounding wall 1, and the radial tapered portion 11 has a plurality of holes 111 penetrating the inside of the surrounding wall 1 and the outside of the surrounding wall 1, that is, the closing portion 12 is perpendicular to the direction of the airflow flowing in the exhaust pipe 6 at the same time, and can force the airflow to pass through the holes 111 on the side, so that the radial tapered portion 11 and the closing portion 12 cooperate with each other to destroy the waveform of the exhaust gas and block the noise.

The surrounding wall 1 further includes a stop 13, which is a sheet structure surrounding the surrounding wall 1 and is capable of abutting against the inside of the exhaust pipe 6, so that the surrounding wall 1 does not slide freely in the exhaust pipe 6. Of course, the blocking plate 13 is not limited to a plate shape, and may be a plurality of protrusions surrounding the surrounding wall 1, or a structure having a fixing function as well.

The surrounding wall 1 has a catalyst contact member 2 at an end thereof away from the closing portion 12, which is disposed inside the surrounding wall 1, and is illustrated as a ceramic fiber mesh structure in the embodiment, as shown in fig. 4. Noble metals such as platinum, rhodium and palladium are attached on the surface of the catalyst contact element 2 as catalysts to catalyze harmful components in the exhaust gas, such as harmful substances such as hydrocarbon, carbon monoxide and nitrogen oxide to be completely combusted, so that the harm to human bodies and the environment after the exhaust gas is discharged is reduced. Meanwhile, the net structure of the catalyst contact member 2 contributes to breaking the waveform of the exhaust gas and blocking the noise.

Second preferred embodiment

As shown in fig. 5-6, in the exhaust pipe with the built-in silencing catalyst pipe for heavy-duty vehicle exhaust pipe according to the second preferred embodiment of the present invention, the same parts as those of the previous preferred embodiment are not repeated herein, and similar components are also given similar names and reference numerals, and only the differences will be described. In this embodiment, the built-in silencing catalyst tube of the first preferred embodiment is applied to the whole exhaust pipe, wherein the front section 4' of the exhaust pipe is connected to the cylinder; an exhaust pipe end section 3 ', illustratively a semi-straight pipe, is connected to the exhaust pipe front section 4' and has an exhaust outlet for exhausting exhaust gases and assisting in noise reduction. In this embodiment, as shown in fig. 6, the surrounding wall 1 ', the exhaust pipe end section 3 ' and the exhaust pipe front section 4 ' of the built-in type silencing catalyst pipe are arranged side by side, and the exhaust pipe front section 4 ' and the exhaust pipe end section 3 ' have mutually matched diameters and can be directly joined to each other.

At this time, the function of the middle section of the exhaust pipe can be replaced by directly inserting the built-in silencing catalyst pipe with the appropriate caliber of the surrounding wall 1 ' between the front section 4 ' and the tail section 3 ' of the exhaust pipe as shown in fig. 5, which is simple and convenient. At this moment, the structure of the surrounding wall 1' and the catalyst contact piece arranged in a matched manner not only can promote the complete combustion of the waste gas, but also can destroy the waveform of the waste gas to reduce the noise, and can provide enough back pressure to enable the engine to start smoothly when running at low speed, but can not generate too much back pressure like an exhaust pipe with a complex clapboard and a bent pipeline in a factory, therefore, the utility model discloses can liberate the horsepower that the engine should have when meeting the regulations, and enable the engine to run smoothly no matter at low speed or high speed. Actual test result can discover, with former factory's blast pipe with the utility model discloses an above-mentioned blast pipe that has heavy locomotive blast pipe built-in amortization catalyst pipe replaces the back, and the noise decibel number is reduced to only 86 ~ 90 decibels by 113, accords with the regulation requirement, and is visible the utility model discloses simple structure can exert very big efficiency.

To sum up, the utility model discloses utilize simple structure, the hole in the seal and the radial convergent portion of perpendicular to blast pipe and air current direction, collocation catalyst contact just can let the exhaust gas complete combustion, the noise abatement pollution of process with the most efficient mode, can provide suitable back pressure again simultaneously, let the engine no matter be low-speed or high-speed all can well operate. That is to say, the utility model discloses replaced the required complicated pipeline of former factory's blast pipe and baffle design, except saving the cost, when more increasing the horsepower, let the automobile body lightweight more, even the mounting means all portably to need not professional personage's assistance, effectively reached the above-mentioned purpose of the utility model.

Claims

1. An exhaust pipe with a built-in silencing catalyst pipe for heavy locomotive exhaust pipe for discharging and treating exhaust gas and noise discharged from a cylinder of a heavy locomotive, comprising:

an exhaust pipe front section for connecting the cylinder;

2. A built-in silencing catalyst tube for exhaust pipe of heavy locomotive is placed in an exhaust pipe to treat the exhaust gas and noise discharged by the cylinder of a heavy locomotive, and is characterized by comprising:

3. The built-in muffler catalyst tube for heavy duty vehicle as recited in claim 2, wherein said surrounding wall further comprises a stopper for abutting against an inner side of said exhaust pipe so that said built-in muffler catalyst tube does not slide arbitrarily in said exhaust pipe.

4. The muffler catalyst pipe built in exhaust pipe of heavy duty vehicle as set forth in claim 3, wherein said barrier is a sheet structure surrounding said surrounding wall.

5. The muffler catalyst pipe built in an exhaust pipe of a heavy duty vehicle as set forth in claim 3, wherein said blocking piece is a plurality of protrusions surrounding said surrounding wall.

6. The muffler installed in an exhaust pipe of a heavy duty vehicle as claimed in claim 2, wherein said catalyst contact member has a multi-layer structure.

7. The muffler installed in an exhaust pipe of a heavy duty vehicle as claimed in claim 2 or 6, wherein said catalyst contact member is a ceramic fiber net structure.