CN216866828U

CN216866828U - Exhaust pipe heat shield assembly

Info

Publication number: CN216866828U
Application number: CN202220231947.3U
Authority: CN
Inventors: 吴勤俭; 朱海望; 孙月芬; 赖挺松
Original assignee: Ningbo Haina Machinery Co ltd
Current assignee: Ningbo Haina Machinery Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-07-01
Anticipated expiration: 2032-01-25

Abstract

The application discloses blast pipe separates heat exchanger assembly belongs to auto-parts technical field for promote the ability that separates the heat exchanger and hinder high temperature to the automobile body conduction under driving and the parking two kinds of states, including pipe box and dustcoat, the external fixed surface of pipe box is connected with the restrictor ring, set up the convection current hole that link up on the restrictor ring, the pipe box inserts together with the restrictor ring in the dustcoat, the both ends fixedly connected with prelude of dustcoat supports end and afterbody support end, the dustcoat passes through prelude support end and afterbody support end with the lateral surface of pipe box is fixed, the prelude supports and serves and is provided with initiative inlet end and passive inlet end, the side of dustcoat is provided with the heat dissipation muscle. This practicality sets up initiative and two kinds of passive air exchange structures for the heat exchanger, no matter the car can both in time cool down after the heat exchanger heaies up at motion state or quiescent condition, ensures to separate the heat exchanger temperature state that remains stable after long-time work.

Description

Exhaust pipe heat shield assembly

Technical Field

The application relates to the technical field of auto parts, especially, relate to an exhaust pipe separates heat exchanger assembly.

Background

When an automobile engine works, exhaust gas is continuously discharged, the exhaust gas is generated by fuel combustion, so the temperature is usually higher, the exhaust gas is discharged to the atmosphere through an exhaust pipe, the heat in the exhaust gas is conducted to surrounding components through the exhaust pipe, so that the temperature of mechanisms around the engine is raised, the working performance of a plurality of mechanisms in a high-temperature environment is seriously influenced, and therefore, a heat insulation cover is arranged on an exhaust pipeline of the automobile at present to reduce the temperature conduction.

The existing exhaust pipe heat insulation cover can be roughly divided into two types, one type is totally enclosed, the heat insulation function is realized through heat insulation materials or air between an inner double-layer cover and an outer double-layer cover, although the heat insulation function is realized, in the long-time working process, the heat insulation materials can be gradually heated and conducted to the outermost cover body, so the durability of the structural form is not high; the other type is a development type, the heat shield has no closed double-layer structure, the heat of an exhaust pipe is taken away mainly by the fact that air penetrates through a gap of the shield body in the driving process of an automobile, and the temperature rise is avoided, but the structure is large in size, and the good cooling and heat insulation effects can be achieved only when the automobile moves. In order to better solve the heat insulation problem of the exhaust pipe, a novel exhaust pipe heat insulation cover assembly is provided.

Disclosure of Invention

The purpose of this application lies in, promotes to separate the heat exchanger and hinder the ability of high temperature to vehicle body conduction under driving and parking two kinds of states.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: the exhaust pipe heat shield assembly comprises a pipe sleeve and an outer cover, a double-layer structure of the heat shield is formed, a flow limiting ring is fixedly connected to the outer surface of the pipe sleeve, a through convection hole is formed in the flow limiting ring and used for reducing the air flow rate, the pipe sleeve and the flow limiting ring are inserted into the outer cover, a head supporting end and a tail supporting end are fixedly connected to two ends of the outer cover, the outer cover is fixed with the outer side surface of the pipe sleeve through the head supporting end and the tail supporting end, an active air inlet end and a passive air inlet end are arranged on the head supporting end, heat dissipation ribs are arranged on the side surface of the outer cover, and the heat dissipation capacity of the outer cover is improved.

Preferably, the number of the flow-limiting rings is several, each flow-limiting ring is in an umbrella-shaped cone shape, the extension line direction of the cone top of the cone-shaped structure points to the tail supporting end, and the special cone structure design enables air flowing through to generate turbulence and improves the heat absorption efficiency of the air.

Preferably, the flow-limiting ring, the head supporting end and the tail supporting end are made of ceramic materials and have high-temperature resistance and low heat conduction characteristics, and the flow-limiting ring is fixed on the outer surface of the pipe sleeve through heat-resistant viscose glue instead of the high-time-consuming process of welding.

Preferably, two ends of the head supporting end and the tail supporting end are respectively fixedly connected with the side surface of the pipe sleeve and one end of the outer cover through heat-resistant adhesive.

Preferably, the heat dissipation ribs on the outer cover are manufactured by a stamping process, and correspondingly, heat dissipation grooves are formed in the outer cover, so that air in the heat insulation cover can be conveniently discharged out of the cavity.

Preferably, the outer surface of the outer cover is fixedly connected with a mounting plate, and a positioning groove is formed in the side face of the mounting plate, so that the heat insulation cover is convenient to mount.

Preferably, the active air inlet end is arranged on the side surface of the head support end, the passive air inlet end is arranged on the end surface of the head support end, and the position of the passive air inlet end, which is opposite to the windward side, is arranged, so that air can be driven to enter the cavity of the heat shield by the movement of an automobile.

Compared with the prior art, the beneficial effect of this application lies in:

(1) the umbrella-shaped ring structure for blocking air flow is arranged in the heat shield, so that convection of air in the heat shield can be reduced, the developed air in the heat shield is kept in a relatively stable state, and the heat insulation capability of the air is exerted more fully;

(2) by arranging the active and passive air exchange structures for the heat shield, the temperature of the automobile can be timely reduced after the temperature of the heat shield is raised no matter the automobile is in a moving state or a static state, and the heat shield is ensured to be kept in a stable temperature state after working for a long time.

Drawings

FIG. 1 is a schematic view of the assembly structure of the exhaust pipe heat shield assembly;

FIG. 2 is a perspective sectional view of the exhaust pipe heat shield assembly;

FIG. 3 is a schematic view of the relationship between the flow restriction ring and the sleeve of the exhaust pipe heat shield assembly;

FIG. 4 is a first perspective cross-sectional view of the outer cover of the exhaust pipe heat shield assembly;

FIG. 5 is a second perspective cut-away view of the housing of the exhaust pipe heat shield assembly.

In the figure: 1. pipe sleeve; 2. a housing; 201. a heat removal tank; 202. heat dissipation ribs; 3. a head support end; 301. an active air intake end; 302. a passive air intake end; 4. a tail support end; 5. a flow-limiting ring; 501. a convection hole; 6. mounting a plate; 601. and (6) positioning a groove.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The exhaust pipe heat shield assembly shown in fig. 1-5 comprises a pipe sleeve 1 and an outer cover 2, which form a double-layer structure of the heat shield, wherein the pipe sleeve 1 is used for being directly sleeved on an exhaust pipe, the outer cover 2 is used for enabling the pipe sleeve 1 to form a space with an automobile mechanism, a flow-limiting ring 5 is fixedly connected to the outer surface of the pipe sleeve 1, the flow-limiting ring 5 is fixed to the outer surface of the pipe sleeve 1 through heat-resistant adhesive, compared with a welding process, the assembly efficiency of components is improved, the air flow rate between the pipe sleeve 1 and the outer cover 2 is reduced, a plurality of flow-limiting rings 5 are arranged, each flow-limiting ring 5 is in an umbrella-shaped cone shape, the extension line direction of the cone top of each cone-shaped structure points to a tail support end 4, so that air forms a revolving turbulent flow in the cone shape during circulation, the heat of the pipe sleeve 1 is absorbed more fully, a through convection hole 501 is formed in the flow-limiting ring 5, and the air flows in a cavity of the heat shield at a lower speed, pipe sleeve 1 inserts in dustcoat 2 together with current-limiting ring 5, the both ends fixedly connected with prelude support end 3 and afterbody of dustcoat 2 support end 4, dustcoat 2 supports end 3 and afterbody through the prelude and supports the lateral surface of end 4 and pipe sleeve 1 and fix, pipe sleeve 1 and current-limiting ring 5 will erect and can not take place to rock in dustcoat 2 like this, current-limiting ring 5, prelude support end 3 and afterbody support end 4 adopt ceramic material to make, possess good high temperature resistant and low heat conduction characteristic, the both ends of prelude support end 3 and afterbody support end 4 support the end fixed connection with pipe sleeve 1 side and dustcoat 2 respectively through heat-resisting viscose, make the inside and outside two-layer structure of heat shield form a stable whole.

An active air inlet end 301 and a passive air inlet end 302 are arranged on the head supporting end 3, the active air inlet end 301 is connected with an air pump, when the temperature of the heat shield is overhigh, the air pump returns to the active air inlet end 301 to introduce air flow, so that the air in the heat shield is accelerated to convect, the heat dissipation efficiency is improved, the temperature of the heat shield is quickly reduced, the passive air inlet end 302 is connected with the atmosphere, when an automobile runs, the air can automatically enter the heat shield through the passive air inlet end 302 to carry out air cooling and temperature reduction, no matter the automobile is in a moving state or a static state, the air in the heat shield can obstruct the heat of the pipe sleeve 1 from being conducted to the outer cover 2, the active air inlet end 301 is arranged on the side surface of the head supporting end 3 to be conveniently connected with the air pump at the bottom of the automobile, the passive air inlet end 302 is arranged on the end surface of the head supporting end 3 and has the same advancing direction as the automobile, the opposite windward air can more easily enter the heat shield, the side surface of the outer cover 2 is provided with heat dissipation ribs 202, increase the heat radiating area of dustcoat 2, improve the radiating efficiency, heat dissipation muscle 202 on dustcoat 2 is made by stamping process to correspondingly leave heat dissipation groove 201 on dustcoat 2, the air that gets into thermal-insulated cover is discharged through this after the heat absorption, and the fixed surface of dustcoat 2 is connected with mounting panel 6, and constant head tank 601 has been seted up to mounting panel 6's side, makes things convenient for this thermal-insulated cover to install in the car bottom.

The working principle of the exhaust pipe heat shield assembly is as follows: the heat insulation cover is sleeved on the automobile exhaust pipe and fixed at the bottom of the automobile, the active air inlet end 301 is connected with the output end of the air pump, air is left between the pipe sleeve 1 and the outer cover 2, the heat insulation cover has good heat insulation capability, when the engine is started, the high temperature exhaust gas passes through the pipe sleeve 1 and conducts heat to the pipe sleeve 1, since the head support end 3 and the tail support end 4 are made of ceramic material with superior heat insulation capability, so the high temperature of the pipe sleeve 1 can not be quickly conducted to the outer cover 2, when the automobile runs, the air with the opposite convection enters the heat insulation cover through the passive air inlet end 302 and extrudes the air with the increased temperature out of the heat exhaust groove 201, if the automobile engine works continuously, the temperature of the outer cover 2 exceeds the threshold value, the air pump is started to extrude cold air into the heat shield through the active air inlet end 301, so that the effect of replacing high-temperature air in the heat shield can be realized, and the double-guarantee heat insulation function is realized.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. An exhaust pipe separates heat exchanger assembly which characterized in that: the heat dissipation pipe comprises a pipe sleeve and an outer cover, wherein a flow limiting ring is fixedly connected to the outer surface of the pipe sleeve, a through convection hole is formed in the flow limiting ring, the pipe sleeve and the flow limiting ring are inserted into the outer cover, a head supporting end and a tail supporting end are fixedly connected to two ends of the outer cover, the outer cover is fixed to the outer side surface of the pipe sleeve through the head supporting end and the tail supporting end, an active air inlet end and a passive air inlet end are arranged on the head supporting end, and heat dissipation ribs are arranged on the side surface of the outer cover.

2. The exhaust pipe heat shield assembly of claim 1 wherein: the number of the flow-limiting rings is several, each flow-limiting ring is in an umbrella-shaped cone shape, and the extension line direction of the cone top of the cone-shaped structure points to the tail supporting end.

3. The exhaust pipe heat shield assembly of claim 1, wherein: the flow-limiting ring, the head supporting end and the tail supporting end are made of ceramic materials, and the flow-limiting ring is fixed on the outer surface of the pipe sleeve through heat-resistant viscose glue.

4. The exhaust pipe heat shield assembly of claim 3 wherein: the two ends of the head supporting end and the tail supporting end are respectively fixedly connected with the side surface of the pipe sleeve and one end of the outer cover through heat-resistant viscose glue.

5. The exhaust pipe heat shield assembly of claim 1 wherein: the heat dissipation ribs on the outer cover are manufactured by a stamping process, and correspondingly heat dissipation grooves are reserved on the outer cover.

6. The exhaust pipe heat shield assembly of claim 1 wherein: the outer fixed surface of dustcoat is connected with the mounting panel, the constant head tank has been seted up to the side of mounting panel.

7. The exhaust pipe heat shield assembly of claim 1 wherein: the active air inlet end is arranged on the side surface of the head part supporting end, and the passive air inlet end is arranged on the end surface of the head part supporting end.