CN204827623U

CN204827623U - Core pipe

Info

Publication number: CN204827623U
Application number: CN201520572570.8U
Authority: CN
Inventors: 马历明
Original assignee: Hangzhou Jinma Pipe Industry Co Ltd
Current assignee: Hangzhou Jinma Pipe Industry Co Ltd
Priority date: 2015-07-31
Filing date: 2015-07-31
Publication date: 2015-12-02
Anticipated expiration: 2025-07-31

Abstract

The utility model discloses a core pipe, including a pipe body, the body be equipped with the arc groove of circumference equipartition outward, be equipped with the through -hole of stagger on the body, the through -hole be big -end -up's horn mouth. This core pipe's body is equipped with the arc groove of circumference equipartition outward, forms the narrow structure that meets, and slit formula structural texture because of airflow direction interlocks each other, thereby makes the noise increase the effect that the reduction low frequency was made an uproar by cancel each other out, takes the through -hole of the stagger of two parts in addition, and takes big -end -up's trumpet - shaped to describe, can further increase core pipe's noise cancelling effect for the muffler can strengthen the noise cancelling effect of muffler.

Description

Core body pipe

Technical field

The utility model and auto parts field, relate to a kind of for the core body pipe in automotive muffler particularly.

Background technique

The device of the reduction noise on the air-flow path that silencing apparatus is mounted in air powered equipment (as blower, air compressor) or in inlet and exhaust system, it can stop sound wave propagation, permission air-flow passes through, it is the effective tool of control noises, also be the vitals of automobile, as a part for outlet pipe, effectively can reduce the exhaust sound of motor, and high-temp waste gas can be made to discharge safely and effectively.Along with the development of China's automobile industry, improving constantly of engine performance, its noise produced is also increasing, so the research of automotive muffler becomes the emphasis of Automobile Enterprises research.And core body pipe is the important component part in baffler, existing core body pipe is exactly simply a kind of body with through hole, and the effect effect of this simple structure to baffler is little.

Model utility content

Technical problem to be solved by this invention is to provide a kind of core body pipe that effectively can improve automotive muffler soundproof effect.

For realizing goal of the invention, the technical solution used in the present invention is:

A kind of core body pipe, comprises body, and be provided with the arc groove that circumference is uniform outside described body, body is provided with staggered through hole.

As preferably, described through hole is up big and down small horn mouth.

As preferably, described staggered through hole is divided into two-part, and wherein a part is along body Zhou Junbu 4 totally 2 row through holes, and a part is along Zhou Junbu 9 totally 7 row through holes.

As preferably, the diameter of described 4 through holes of totally 2 row is less than along Zhou Junbu 97 row totally.

The arc groove that circumference is uniform is provided with outside the body of core body pipe of the present utility model, formed and narrowly meet structure, slit structural texture, because airflow direction is interlaced, noise can be cancelled out each other thus add the effect reducing low frequency and make an uproar, and taking two-part staggered through hole, and taking up big and down small horn mouth shape, the erasure effect of core body pipe can be increased further, the erasure effect of baffler can be strengthened for baffler.

Accompanying drawing explanation

Fig. 1 is the longitudinal sectional view of core body pipe in the utility model automotive muffler;

Fig. 2 is the unfolded drawing of core body pipe in the utility model automotive muffler.

Embodiment:

Below in conjunction with accompanying drawing, core body pipe of the present utility model is described further.

Embodiment 1

Core body pipe as depicted in figs. 1 and 2, comprise body, the arc groove that circumference is uniform is provided with outside described body, body is provided with staggered through hole, described staggered through hole is divided into two-part, wherein a part is along body Zhou Junbu 4 totally 2 row through holes, and a part is along Zhou Junbu 9 totally 7 row through holes, and the diameter of through holes of described 4 totally 2 row is less than along Zhou Junbu 97 row totally.

Above embodiment is described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that the common engineers and technicians in related domain make the technical solution of the utility model and improvement, all should fall in protection domain that claims of the present utility model determine.

Claims

1. a core body pipe, comprises body, it is characterized in that being provided with the uniform arc groove of circumference outside described body, and body is provided with staggered through hole.

2. core body pipe according to claim 1, is characterized in that described through hole is up big and down small horn mouth.

3. core body pipe according to claim 1, is characterized in that described staggered through hole is divided into two-part.

4. core body pipe according to claim 3, is characterized in that a part is that a part is along Zhou Junbu 9 totally 7 row through holes along body Zhou Junbu 4 totally 2 row through holes.

5. core body pipe according to claim 4, is characterized in that the diameter of described 4 through holes of totally 2 row is less than along Zhou Junbu 97 row totally.