CN204627720U - A kind of double-deck outer net flexible pipe - Google Patents

Abstract

The utility model discloses a flexible pipe with a double-layer outer mesh, which comprises a corrugated pipe, an outer braided mesh and an encapsulation sleeve, and is characterized in that the outer braided mesh is socketed with the corrugated pipe, and the outer braided mesh and the corrugated pipe A three-dimensional knitted net is arranged between them, and the two ends of the bellows are connected through a packaging sleeve. The utility model has the beneficial effects of simple structure, long service life and low noise.

Description

A double-layer outer mesh flexible pipe

technical field

The utility model relates to the technical field of pipe fittings, in particular to a flexible pipe with a double-side outer net structure used in an automobile exhaust system.

Background technique

During the exhaust process, the exhaust system of the vehicle is prone to vibration and abnormal noise. In the market, people reduce vibration and abnormal sound by adding a section of flexible pipe. Prior art flexible pipes consist of a corrugated pipe and an outer braided mesh. When in use, the outer braided mesh is easily broken, which reduces the service life of the bellows. Moreover, the elasticity of the outer braided mesh is limited, which cannot effectively absorb the displacement generated by the exhaust system during vibration, and does not effectively solve noise problems such as abnormal noise of the exhaust system. However, the general exhaust system or flexible pipe structure in the prior art does not effectively solve the above problems. For example, the Chinese patent authorization announcement number CN 12996650 C, the authorization announcement date was January 24, 2007, and the name of the invention was flexible pipe fittings. The combined innovation of the structure of the hose and the spacer avoids the premature failure of the bellows, but the braided hose in this patent is still made of a braided mesh with a planar structure, which does not improve the fatigue life of the bellows. The problem of low lifespan. Another example is the Chinese patent application publication number CN 104048118 A, the application publication date was September 17, 2014. The name of the invention is flexible pipe fittings for automobile exhaust pipes. The patent case discloses a flexible pipe structure. The combined innovation of pipe components, linkage components, braided components, cap components and intermediate components has achieved the characteristics of good reliability of bellows components, but the braided components in this patent are still planar structures, which have not improved the fatigue of bellows Strength, there is the problem of low service life, and it has not effectively solved the noise problems such as the abnormal sound of the exhaust system. The utility model provides a double-layer outer-network flexible pipe with simple structure, convenient assembly, disassembly and replacement, long service life and low noise through the combined innovation of bellows, knitted net, outer-layer braided net and packaging sleeve.

Contents of the invention

The utility model solves the problems that the structure of the general flexible pipe in the prior art does not effectively solve the problems of short service life and high noise, and provides a flexible pipe with double-layer outer mesh, through corrugated pipe, knitted mesh, outer layer knitted mesh and packaging sleeve, etc. Combining innovations, the double-layer outer mesh flexible pipe has the characteristics of simple structure, convenient assembly and disassembly, long service life and low noise.

In order to solve the above-mentioned existing technical problems, the utility model adopts the following technical solutions: a double-layer outer mesh flexible pipe, including a corrugated pipe, an outer layer braided mesh and a packaging sleeve, characterized in that the outer layer braided mesh and the corrugated The tube is socketed, and a three-dimensional knitted net is arranged between the outer braided net and the corrugated tube, and the two ends of the corrugated tube are connected through an encapsulation sleeve.

When assembling, put the knitted net on the outside of the bellows, then put the outer braided net on the outside of the knitted net, and then press the outer braided net and the knitted net to the ends of the corrugated tube at both ends of the corrugated tube. Then put on the packaging sleeve, fix the packaging sleeve and the bellows, and finally trim the end of the packaging sleeve, cut off the excess outer braided mesh and knitted mesh, and the assembly is completed.

The corrugated pipe has a simple structure and is the main body of the flexible pipe, which has good flexibility and bending strength. For the convenience of manufacture, the corrugated pipe of the utility model has a circular structure; It is braided by root metal wire, without welding or other processes for fixing, it still has good flexibility and bending strength, and is used to protect the bellows; the packaging sleeve, with a simple structure, is used to fix the outer braided mesh and knitted mesh; three-dimensional structure The knitted mesh is made of metal wire into a multi-layered three-dimensional mesh structure through the knitting process, which is full of elasticity. When the exhaust system is working, it is used to reduce or offset the vibration of the bellows and the displacement caused by the vibration, which greatly reduces the ripples. The vibration of the pipe prolongs the service life of the bellows, and also greatly reduces the noise such as the abnormal sound of the automobile exhaust system. The double-layer outer net flexible pipe of the utility model can still protect the bellows when the outer braided net breaks, further prolonging the service life of the bellows.

Preferably, the inner wall of the corrugated tube is sleeved with a built-in tube. During the exhaust process, the exhaust gas of the automobile has a very high temperature, and the built-in tube is used to protect the bellows, prevent the bellows from failing due to heat deformation, and prolong the service life of the bellows.

Preferably, the built-in tube is composed of multiple inner tube monomers, the cross-section of the inner tube monomers is an S-shaped structure, and two adjacent inner tube monomers are buckled and connected to each other. This structure makes any adjacent inner tube monomer have a certain expansion and contraction ability, which is just suitable for the vibration performance of the bellows, and the assembly of the inner tube is convenient.

Preferably, both ends of the built-in pipe are respectively connected to the bellows by welding. The welding process has the characteristics of reliable connection.

Preferably, both ends of the bellows are respectively connected to the packaging sleeve by welding. The welding process has the characteristics of reliable connection.

Preferably, both ends of the bellows are respectively fixed to the packaging sleeve by bolts. The bolted structure has the characteristics of easy assembly, disassembly and replacement.

Due to the adoption of the above-mentioned technical scheme, the utility model provides a double-layer outer mesh flexible pipe with such beneficial effects: through the combination and innovation of bellows, knitted mesh, outer layer braided mesh and packaging sleeve, etc., a simple structure is provided. , Easy to assemble and disassemble and replace, long service life and low noise double-layer outer mesh flexible pipe.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the utility model;

Accompanying drawing 2 is the A-A direction sectional view of accompanying drawing 1 of the utility model;

Accompanying drawing 3 is the A direction enlarged view of accompanying drawing 2 of the present utility model.

In the figure: 1 bellows, 2 outer braided mesh, 3 packaging sleeve, 4 knitted mesh, 5 inner tube monomer.

Detailed ways

Referring to the accompanying drawings, the utility model is described in further detail.

Embodiment 1: In combination with accompanying drawings 1, 2, and 3, a flexible pipe with a double-layer outer mesh includes a corrugated pipe 1, an outer braided mesh 2 and a packaging sleeve 3, the outer braided mesh 2 is socketed with the corrugated pipe 1, and the outer mesh A knitted mesh 4 with a three-dimensional structure is arranged between the braided mesh 2 and the corrugated tube 1 , and the two ends of the corrugated tube 1 are welded and connected to the packaging sleeve 3 respectively.

Embodiment 2, in combination with accompanying drawings 1, 2, and 3, a flexible pipe with a double-layer outer mesh, including a corrugated pipe 1, an outer braided mesh 2 and a packaging sleeve 3, the outer braided mesh 2 is socketed with the corrugated pipe 1, and the outer mesh A knitted net 4 with a three-dimensional structure is arranged between the braided net 2 and the corrugated tube 1. The two ends of the corrugated tube 1 are respectively fixed with the packaging sleeve 3 by bolts. The inner tube monomer 5 is composed of an S-shaped cross section, and two adjacent inner tube monomers 5 are buckled and connected to each other.

The two specific embodiments described above have introduced the utility model in detail. In this paper, specific examples are used to illustrate the principle and implementation of the utility model, and the description of the examples is only used to help understand the core idea of the utility model. It should be pointed out that for those skilled in the art, without departing from the core idea of the utility model, some modifications can also be made to the utility model, such as the diameter of the bellows, the packaging sleeve and the built-in tube, and other specific details. Amendments to technical parameters, etc. or several combinations of claims should fall within the scope of protection of the claims of the utility model.

Claims (6)

1. A flexible pipe with a double-layer outer mesh, comprising a corrugated pipe (1), an outer braided mesh (2) and an encapsulation sleeve (3), characterized in that the outer braided mesh (2) and the corrugated pipe (1 ) socket, a three-dimensional knitted mesh (4) is arranged between the outer braided mesh (2) and the corrugated tube (1), and the two ends of the corrugated tube (1) are connected through an encapsulation sleeve (3). 2. The flexible pipe with double-layer outer mesh according to claim 1, characterized in that, the inner wall of the corrugated pipe (1) is sleeved with a built-in pipe. 3. A flexible pipe with double-layer outer mesh according to claim 2, characterized in that the built-in pipe is composed of multiple inner pipe monomers (5), and the section of the inner pipe monomer (5) is S-shaped structure, two adjacent inner tube monomers (5) are buckled and connected to each other. 4. The flexible pipe with double-layer outer mesh according to claim 2, characterized in that, the two ends of the built-in pipe are respectively connected to the bellows (1) by welding. 5. The flexible pipe with double-layer outer mesh according to claim 1, characterized in that, the two ends of the corrugated pipe (1) are connected to the packaging sleeve (3) respectively by welding. 6 . The double-layer outer net flexible pipe according to claim 1 , characterized in that, the two ends of the corrugated pipe ( 1 ) are respectively fixed to the packaging sleeve ( 3 ) by bolts. 7 .