CN205503243U - Outlet duct part - Google Patents

Abstract

The utility model discloses an outlet duct part, including link, pipe shaft, helical blade, wherein the link is the inlet end, and the pipe shaft links to each other with the link, and the opposite side of the relative link of pipe shaft is given vent to anger to hold and is connected the catalyst converter for the end of giving vent to anger, the pipe shaft be the curved surface, its cross section is along progressively reducing from the direction of inlet end to the end of giving vent to anger, the pipe shaft have helical blade on the inner wall that is close to the end one side of giving vent to anger, through wall thickness, the cross section internal diameter that rationally sets up the pipe shaft, blade thickness, height, the angle of buckling have realized that airflow direction is equitable, technological effect that catalytic effect is good.

Description

A kind of escape pipe parts

Technical field

This utility model relates to field of machining, especially relates to a kind of escape pipe parts.

Background technology

In modern society, automobile becomes the more and more universal vehicles, along with the explosion type of auto output and sales volume increases Long, the pollution of vehicle exhaust and the impact on air and environment that increases of oil consumption are also stepped up, the most national multiple cities The haze occurred causes the very big concern of the common people and government, becomes the important theme being related to national health, promotes environmental protection Consciousness steps up with environmental practice, and current China is faced with economic transition, and socio-ecological environment's construction and energy-saving and emission-reduction are controlled Reason haze is important process content, and private savings automobile in current each big city, taxi, bus, bus, lorry, weight Smoke intensity and nitrogen oxides that type trucies etc. are discharged are extremely serious, are the main sources causing PM2.5 and P10 particulate matter, to society Very big with human health risk.

At present, a lot of cities all start to perform Europe IV discharge standard, and haze starts to perform than such as Beijing, more serious city Europe V grade standard, and the escape pipe of vehicle exhaust is the vitals of exhaust emissions, process, plays an important role aerofluxus, escape pipe Being divided into inlet end and outlet side, wherein pipe shaft is complicated curved surface, and then traditional processing technology for cast out 4 parts respectively Coupling together by the way of welding, the method cost of wasting time and energy is high, and easily produces defect, simultaneously at the position of welding again The outlet side of escape pipe connects catalyst converter, and traditional mode is to be directly connected to, and lifting surface area is little, and catalytic effect is poor, has in recent years Part escape pipe uses the mode increasing blade to make air current flow mode change, but it is unreasonable, no to still suffer from structure design The problem that can give full play to catalyst converter catalytic action.

Utility model content

For above-mentioned technical problem, this utility model provides a kind of escape pipe parts, it is possible to achieve one-body molded, air-flow Direction is reasonable, the technique effect of excellent catalytic effect.

The technical scheme that this utility model is complete includes:

A kind of escape pipe parts, including connecting end, pipe shaft, helical blade, wherein connecting end is inlet end, pipe shaft be connected End is connected, and the opposite side of pipe shaft opposing attached end is outlet side, and outlet side connects catalyst converter, and described pipe shaft is curved surface, and it is horizontal Cross section progressively reduces along the direction from inlet end to outlet side, and described pipe shaft is having spiral shell on the inwall of side, outlet side Vane sheet, it is characterised in that

If the wall thickness of described pipe shaft is d, the internal diameter of pipe shaft cross section is D, and the thickness of blade is h, the height of blade, i.e. from Connecting tube is in and starts to the distance of blade highest point to be H, and above unit is mm, and the angle of blade bent, i.e. blade start The normal of end is with to terminate the normal angle of end be a, and unit is degree, meets following relation:

H=0.6d；

$H=0.3D+0.45\sqrt{d};$

Preferably, the wall thickness of described pipe shaft is 4mm, and the internal diameter of described pipe shaft cross section is 36mm.The thickness of described blade For 2.4mm, the height of blade is 12.9mm, and the angle of described blade bent is 90 °.

This utility model is relative to the advantage of prior art: by rationally arranging the wall thickness of pipe shaft, cross sectional inner diameter, Vane thickness, highly, bending angle, it is achieved that airflow direction is reasonable, and the technique effect of excellent catalytic effect has concurrently good simultaneously Mechanical strength so that each parts of escape pipe are unlikely to deform under the working condition that high temperature shakes, and service life is long.

Accompanying drawing explanation

Fig. 1 is escape pipe modular construction schematic diagram disclosed in this utility model.

Fig. 2 is escape pipe part cross section schematic diagram disclosed in this utility model；

Fig. 3 is the helical blade top view of escape pipe parts disclosed in this utility model.

In figure: 1 for connecting end, and 2 is pipe shaft, and 3 is helical blade.

Detailed description of the invention

With detailed description of the invention, this utility model is described further below in conjunction with the accompanying drawings.

As it is shown in figure 1, a kind of escape pipe parts, including connecting end 1, pipe shaft 2, helical blade 3.

Wherein connecting end 1 is inlet end, and pipe shaft 2 is connected with being connected end 1, and the opposite side of pipe shaft 2 opposing attached end 1 is for giving vent to anger End, outlet side connects catalyst converter, and described pipe shaft is curved surface, and its cross section progressively subtracts along the direction from inlet end to outlet side Little, described pipe shaft is having helical blade 3 on the inwall of side, outlet side, it is characterised in that

If the wall thickness of described pipe shaft is d, the internal diameter of pipe shaft cross section is D, and the thickness of blade 3 is h, the height of blade 3, i.e. Being in from connecting tube and start to the distance of blade highest point to be H, above unit is mm, as in figure 2 it is shown, the angle of blade bent Degree, the i.e. normal of blade starting end are a with the normal angle of end end, and unit is degree, as it is shown on figure 3, meet following relation:

H=0.6d；

$H=0.3D+0.45\sqrt{d};$

Preferably, the wall thickness of described pipe shaft is 4mm, and the internal diameter of described pipe shaft cross section is 36mm.The thickness of described blade For 2.4mm, the height of blade is 12.9mm, and the angle of described blade bent is 90 °.

Claims (2)

1. escape pipe parts, including connect end, pipe shaft, helical blade, wherein connect end be inlet end, pipe shaft be connected end Being connected, the opposite side of pipe shaft opposing attached end is outlet side, and outlet side connects catalyst converter, and described pipe shaft is curved surface, and it is transversal Face progressively reduces along the direction from inlet end to outlet side, and described pipe shaft is having spiral on the inwall of side, outlet side Blade, it is characterised in that

If the wall thickness of described pipe shaft is d, the internal diameter of pipe shaft cross section is D, and the thickness of blade is h, and the height of blade, i.e. from connection Starting at pipe shaft to the distance of blade highest point is H, above unit is mm, the angle of blade bent, i.e. blade starting end Normal is with to terminate the normal angle of end be a, and unit is degree, meets following relation:

H=0.6d；

。

2. the escape pipe parts described in claim 1, it is characterised in that the wall thickness of described pipe shaft is 4mm, described pipe shaft cross section Internal diameter be 36mm, the thickness of described blade is 2.4mm, and the height of blade is 12.9mm, and the angle of described blade bent is 90°。