CN216665727U

CN216665727U - Novel exhaust manifold separates heat exchanger

Info

Publication number: CN216665727U
Application number: CN202123194699.4U
Authority: CN
Inventors: 黄文波; 苏志伟; 叶文城; 林耀阳; 吴云流
Original assignee: Fujian Nanan Vocational School
Current assignee: Fujian Nanan Vocational School
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-06-03
Anticipated expiration: 2031-12-17

Abstract

The utility model discloses a novel exhaust manifold heat shield which comprises a first heat shield sheet and a second heat shield sheet, wherein the first heat shield sheet is provided with a first flanging, a first free end and a first connecting end, the second heat shield sheet is provided with a second flanging, a second free end and a second connecting end, and an included angle between the first flanging and the second flanging is 36.3 degrees. According to the utility model, the heat shield body is formed into the L-shaped structure through the connection of the first heat insulating sheet and the second heat insulating sheet, so that the area of the exhaust manifold covered by the heat shield body is increased, and the heat insulation capability of the heat shield body is enhanced; meanwhile, the first heat insulation sheet and the second heat insulation sheet are respectively coated by the first flanging and the second flanging, the structural form of the traditional exhaust manifold heat insulation cover is changed, the cost is not increased, the heat insulation effect of the exhaust manifold heat insulation cover is enhanced, the temperature of the periphery of the exhaust manifold is reduced, and the service life of peripheral devices is prolonged.

Description

Novel exhaust manifold separates heat exchanger

Technical Field

The utility model relates to the technical field of automobile parts, in particular to a novel exhaust manifold heat shield.

Background

The engine exhaust manifold heat shield of the automobile is covered around the exhaust manifold, so that on one hand, the heat shield has the function of thermal isolation, prevents the temperature field of the engine room from being too high due to the dissipation of exhaust heat, and reduces the heat radiation to other parts; on the other hand, the normal work of other related components is facilitated, the safety is ensured, the heat dissipation of the exhaust pipe is reduced, the rapid ignition of the three-way catalyst can be ensured, and pollutants in the cold start stage are reduced; in addition, the exhaust manifold heat shield can guide heat.

Therefore, when the exhaust manifold heat shield is required to wrap an exhaust manifold of an engine, the inner wall of the shield body is tightly attached to the exhaust manifold, and the assembly also has high requirements; on the other hand, when the wrapping attaching degree of the heat shield and the exhaust manifold is higher, the heat shield accumulates a large amount of heat along with the time, the heat dispersibility is poor, and a heat accumulation effect is caused. However, for some specific engine models on the market, the existing heat shield on the market cannot meet the requirements.

In view of the above, the present inventors have conducted extensive studies to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide the exhaust manifold heat shield which is simple in structure, low in cost, not easy to deform and good in heat insulation effect.

In order to achieve the purpose, the utility model adopts the following technical scheme: a novel exhaust manifold heat shield comprises a heat shield body, the shape of which is matched with the shape of an exhaust manifold of an engine, the heat shield body is fixedly connected with the exhaust manifold, the heat shield body comprises a first heat shield and a second heat shield which is connected and arranged on the first heat shield, the first heat shield and the second heat shield are both in a long sheet shape and consistent with the extension direction of a pipeline of the exhaust manifold, the first heat shield is provided with a first free end and a first connecting end along the length direction, and the second heat shield is provided with a second free end and a second connecting end along the width direction;

the first connecting end is connected with a first flanging, the first flanging is erected on the first heat-insulating sheet and faces one side of the second heat-insulating sheet, the second free end is connected with a second flanging, the second flanging and the first heat-insulating sheet are erected on the second heat-insulating sheet and face the same side, and an included angle formed by the edge connected with the first flanging and the second heat-insulating sheet and the edge connected with the second flanging and the first heat-insulating sheet is 36.3 degrees.

Preferably, a notch for avoiding the engine cylinder is formed in a position, close to the first connecting end, of the first heat insulation sheet.

Preferably, a plurality of corresponding positions on the first heat insulating sheet and the second heat insulating sheet are provided with protruding structures, the protruding structures are provided with screw mounting holes used for being mounted in a matched mode with the exhaust manifold, and the first heat insulating sheet and the second heat insulating sheet are mounted in a matched mode with the exhaust manifold through screws.

Preferably, there are two screw mounting holes on the first heat insulation sheet, and the two screw mounting holes are respectively arranged on the first heat insulation sheet along the length direction of the first heat insulation sheet.

Preferably, the first heat-insulating sheet has at least one reinforcing rib, and the second heat-insulating sheet has at least one reinforcing rib.

Preferably, the first heat insulation sheet is provided with one reinforcing rib along the width direction of the first heat insulation sheet, the reinforcing rib extends to the second flanging, and the reinforcing rib extends from the first heat insulation sheet to the second flanging along the second heat insulation sheet.

Preferably, the second heat insulation sheet is provided with one reinforcing rib along the width direction of the second heat insulation sheet, and the reinforcing rib extends to the second flanging.

Preferably, the reinforcing rib is a reinforcing rib protrusion or a reinforcing rib groove, the reinforcing rib protrusion or the reinforcing rib groove is a bar-shaped reinforcing rib, the middle part of the bar-shaped reinforcing rib is an oval reinforcing rib, and two opposite sides are in arc transition.

Preferably, the plate structure of heat exchanger body is sandwich three layer construction, including the integrative stamping forming of top layer, bottom and intermediate level, the top layer with the bottom is aluminized steel sheet layer, the intermediate level is the ceramic fibre layer.

By adopting the design scheme, the utility model has the beneficial effects that: the heat shield body is formed into an L-shaped structure through the connection of the first heat insulating sheet and the second heat insulating sheet, so that the area of an exhaust manifold covered by the heat shield body is increased, and the heat insulation capability of the heat shield body is enhanced; meanwhile, the first heat insulation sheet and the second heat insulation sheet are respectively coated together through the first flanging and the second flanging, the structural form of the traditional exhaust manifold heat insulation cover is changed, the heat insulation effect of the exhaust manifold heat insulation cover is enhanced while the cost is not increased, the temperature at the periphery of an exhaust manifold is reduced, and the service life of peripheral devices is prolonged; in addition, the heat insulation effect of the utility model is enhanced, so that the action time of the three-way catalyst is shortened when the engine is started by a cold machine, and the exhaust index is reduced when the engine is started by the cold machine.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is another schematic structural view of the present invention;

in the figure: the heat insulation structure comprises a first heat insulation sheet 1, a first free end 11, a first connecting end 12, a notch 13, a second heat insulation sheet 2, a second free end 21, a second connecting end 22, a first cambered surface 31, a second cambered surface 32, a third cambered surface 33, a reinforcing rib 4, a first reinforcing rib 41, a second reinforcing rib 42, a first turnover surface 51, a second turnover surface 52, a protruding structure 6, a screw mounting hole 61 and a cavity hole 7.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Refer to fig. 1 to 2

The utility model provides a novel exhaust manifold separates heat exchanger, includes that appearance and exhaust manifold (not shown in the figure) shape matched with of engine separate the heat exchanger body, separate the heat exchanger body with exhaust manifold passes through installation fixed connection and is in the same place, separate the heat exchanger body and include first heat shield 1 and connect the second heat shield 2 that sets up on first heat shield 1, through first cambered surface 31 transitional coupling between first heat shield 1 and the second heat shield 2. The first heat insulation sheet 1, the second heat insulation sheet 2 and the first cambered surface 31 are installed in a matching way with the exhaust manifold as a whole, so that the heat insulation effect of the utility model is enhanced. Preferably, at least one reinforcing rib 4 may be provided on both the first and second heat-

shielding sheets

1 and 2 in order to increase the strength and structural stability of the present invention. The reinforcing ribs 4 can be formed by stamping, so that the reinforcing ribs 4 are arranged at corresponding positions of the first heat insulation sheet 1 and the second heat insulation sheet 2. The reinforcing ribs 4 are strip reinforcing ribs which are of a square-shaped reinforcing rib structure, the middle of each strip reinforcing rib is an oval reinforcing rib, two opposite sides of each strip reinforcing rib are in arc transition, and the corners of the strip reinforcing ribs are set to be round chamfers. Therefore, through further setting round corners and circular arc transition, the mechanical property and the mechanical structure property of the whole exhaust manifold heat shield are improved, the rigidity of the connecting structure is strengthened, and the cracking of the heat shield body caused by stress concentration at high temperature can be avoided.

It is worth explaining that the plate structure of the heat shield body is a sandwich three-layer structure, and comprises a top layer (not shown in the figure), a bottom layer (not shown in the figure) and a middle layer (not shown in the figure) which are integrally formed, and reinforcing ribs 4 are integrally formed during stamping, so that the convenience of processing and production is improved by the integrally formed stamping, inconvenience caused by procedures such as welding of workers is avoided, and due to the fact that the plate structures are adopted, the complexity of processing procedures is low, the enterprise cost is saved, the production efficiency is improved, better structural rigidity, mechanical strength and mechanical property can be kept by the integrally formed structure, and the service life of the heat shield body is prolonged.

The top layer and the bottom layer are aluminum-plated steel plate layers, and the middle layer is a ceramic fiber layer. Specifically, the top layer and the bottom layer can be made of a steel plate SA1D with good heat resistance, heat reflectivity and corrosion resistance, and the middle layer can be made of a Carbolane plate with better assembly characteristics and heat insulation function. By processing the exhaust manifold heat shield body into the three-layer structure, the top layer and the bottom layer formed by the aluminized steel plate have good deep punching performance and are not easy to corrode, and the service life of the heat shield body is favorably ensured; the intermediate layer can further improve the heat insulation and sound absorption performance of the heat shield. The exhaust manifold heat shield body obtained by carrying out multiple bending and flanging molding on the exhaust manifold heat shield provided by the utility model adopts the three-layer structure to be integrally stamped, so that a thermosensitive element assembled near the exhaust manifold and a wire harness which cannot resist thermal radiation can be well protected, and meanwhile, the noise of the exhaust manifold can be controlled, so that the exhaust manifold heat shield body is suitable for stable work in a high-temperature state and a vibration state.

The first heat insulation sheet 1 and the second heat insulation sheet 2 are both in long sheet shapes and are consistent with the extending direction of the pipeline of the exhaust manifold, the first heat insulation sheet 1 is provided with a first free end 11 and a first connecting end 12 along the length direction, and the second heat insulation sheet 2 is provided with a second free end 21 and a second connecting end 22 along the width direction.

Further, the equal rounding off of surface of first heat shield 1 and second heat shield 2 has improved the aesthetic property of first heat shield 1 and second heat shield 2, has avoided having sharp-pointed part on the heat shield body and bring the safety risk to manufacturing and installer, and first cambered surface 31 transition has reduced the regional stress concentration of transition simultaneously, and then has reduced the probability that the defect appears in the heat shield body in the processing manufacturing process is favorable to guaranteeing product quality.

The middle of the second heat shield 2 is arranged at a position of the first heat shield 1 close to the first free end 11, and the second connection end 21 is connected with the first heat shield 1. The first connecting end 12 is connected with a first flanging 51, the first flanging 51 is erected on the first heat insulation sheet 1 and faces one side of the second heat insulation sheet 2, the second free end 21 is connected with a second flanging 52, the second flanging 52 and the first heat insulation sheet 1 are both erected on the second heat insulation sheet 2 and face the same side, and an included angle formed by the edge connected with the first flanging 51 and the second heat insulation sheet 2 and the edge connected with the second flanging 52 and the first heat insulation sheet 1 is 36.3 degrees. The contained angle between the limit that first turn-ups 51 and second heat insulating sheet 2 are connected and the limit that second turn-ups 52 and first heat insulating sheet 1 are connected can expand the thermal-insulated space of heat shield under limited plate structure, makes the heat shield body with exhaust manifold extends certain clearance when fixed, the heat on the exhaust manifold is difficult to too concentrated, has reduced high temperature to the conduction of the outside pencil of heat shield body and temperature sensing part, when thermal-insulated, also has better thermal diffusivity, can play to a certain extent and maintain the effect of heat shield body working property for a long time.

The exhaust manifold heat shield which is not partially wrapped by the first flanging 51, the second flanging 52 and the second heat insulation sheet 2 forms a cavity 7 for the outlet pipe of the exhaust manifold to extend out, the outlet pipe of the exhaust manifold extends out of the cavity 7, the rest part of the exhaust manifold is protected by the heat shield body, the whole heat shield body realizes heat insulation of the exhaust manifold from a plurality of angles such as radial direction, axial direction and the like, and has good heat insulation effect on components and wiring harnesses which are not resistant to heat radiation near an assembly structure; meanwhile, it is worth explaining that the boundary of the cavity hole 7 is not closed, and compared with the cavity hole 7 with a closed boundary, the heat insulation structure has a certain heat radiation guide outlet, the heat radiation effect is good, and a certain overhauling and maintaining space is reserved, so that the pipeline of the exhaust manifold and the heat insulation cover body can be maintained conveniently when the engine is stopped.

The first heat shield 1 is provided with a first reinforcing rib 41 along the width direction of the first heat shield 1, the first reinforcing rib 41 extends to the second flange 52, and the first reinforcing rib 41 extends from the first heat shield 1 to the second flange 52 along the second heat shield 2. The second heat insulating sheet 2 is provided with a second reinforcing rib 42 along the width direction of the second heat insulating sheet 2, and the second reinforcing rib 42 extends to the second flange 52. The first reinforcing bead 41 and the second reinforcing bead 42 are each in conformity with the shape and properties of the above-described reinforcing bead 4.

In the embodiment of the utility model, the heat shield body comprises a first heat insulating sheet 1 arranged along the direction of the exhaust manifold, a first flanging 51 connected with the first heat insulating sheet 1, a second heat insulating sheet 2 connected with the first heat insulating sheet 1 and a second flanging 52 connected with the second heat insulating sheet 2, wherein the first heat insulating sheet 1 is in transition with the first flanging 51 through a second cambered surface 32, and the second heat insulating sheet 2 is in transition with the second flanging 52 through a third cambered surface 33. The first heat insulation sheet 1, the first flanging 51, the second heat insulation sheet 2 and the second flanging 52 are insulated from heat radiation in the coating range, so that influence of the heat radiation on other structures or parts in the cabin is avoided. The transition of the second cambered surface 32 and the third cambered surface 33 reduces the stress concentration of a transition area, so that the probability of defects of the heat shield body in the processing and manufacturing process is reduced, and the product quality is favorably ensured.

Further, a notch 13 for avoiding the engine cylinder is arranged on the first heat insulation sheet 1 near the first connection end 12. By arranging the notch 13, partial accessories such as engine wiring harnesses and pipelines mounted on the exhaust manifold can be conveniently extended out in an abdicating way, and the influence on the working effect caused by long-term arrangement in the heat shield body is prevented.

The first heat-insulating sheet 1 and the second heat-insulating sheet 2 are provided with a plurality of corresponding positions with protruding structures 6, the protruding structures 6 are provided with screw mounting holes 61 for being mounted with the exhaust manifold in a matched mode, and the first heat-insulating sheet 1 and the second heat-insulating sheet 2 are mounted with the exhaust manifold in a matched mode through screws (not shown in the figure). Specifically, two screw mounting holes 61 are formed in the first heat insulating sheet 1, and are respectively provided in the first heat insulating sheet 1 along the longitudinal direction of the first heat insulating sheet 1. The contact area between the protruding structure 6 and the exhaust manifold is increased, the fixing stability of the protruding structure and the exhaust manifold is enhanced, and the groove formed in the heat shield body can further achieve the effect of reducing the weight and the material of the heat shield body.

Further, a warning mark (not shown) for prohibiting touch is provided on an outer surface of the first heat insulating sheet 1 and/or the second heat insulating sheet 2. The setting of this warning sign can increase people to engine exhaust manifold's dangerous consciousness, has effectively avoided the injury that the heat that engine exhaust manifold gived off caused the human body.

By adopting the design scheme, the utility model has the beneficial effects that: through the connection of the first heat insulation sheet 1, the second heat insulation sheet 2, the first flanging 51 and the second flanging 52, the heat insulation cover body is formed into an L-shaped structure, so that the area of an exhaust manifold coated by the heat insulation cover body is increased, the heat insulation capability of the heat insulation cover body is enhanced, the influence of heat radiation generated by the exhaust manifold on other structures and parts in an engine cabin is reduced, and the normal use of a vehicle is ensured; meanwhile, the engine is coated by the first heat insulating sheet 1, the second heat insulating sheet 2, the first flanging 51 and the second flanging 52, the structural form of the traditional engine exhaust manifold heat shield is changed, the heat insulating effect of the engine exhaust manifold heat shield is enhanced without increasing the cost, the temperature around the engine exhaust manifold is reduced, and the service life of peripheral devices is prolonged; in addition, the first heat insulation sheet 1 and the second heat insulation sheet 2 are simple in manufacturing and installation, and the processing difficulty of directly processing a heat insulation cover with a large heat insulation area is avoided;

although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel exhaust manifold separates heat exchanger, separates the heat exchanger body including the exhaust manifold shape matched with of appearance and engine, separate heat exchanger body and exhaust manifold fixed connection, its characterized in that: the heat shield body comprises a first heat insulation sheet and a second heat insulation sheet connected and arranged on the first heat insulation sheet, the first heat insulation sheet and the second heat insulation sheet are both in a long sheet shape and consistent with the extending direction of a pipeline of the exhaust manifold, the first heat insulation sheet is provided with a first free end and a first connecting end along the length direction, and the second heat insulation sheet is provided with a second free end and a second connecting end along the width direction;

2. The novel exhaust manifold heat shield of claim 1, wherein: and a notch for avoiding the engine cylinder body is arranged at the position, close to the first connecting end, of the first heat insulation sheet.

3. The novel exhaust manifold heat shield of claim 2, wherein: the first heat shield and the second heat shield are provided with a plurality of corresponding positions and protruding structures, the protruding structures are provided with screw mounting holes used for being mounted in a matched mode with the exhaust manifold, and the first heat shield and the second heat shield are mounted in a matched mode with the exhaust manifold through screws.

4. The novel exhaust manifold heat shield of claim 3, wherein: the screw mounting holes in the first heat insulation sheet are two and are respectively arranged on the first heat insulation sheet along the length direction of the first heat insulation sheet.

5. The novel exhaust manifold heat shield according to claim 1, wherein: at least one reinforcing rib is arranged on the first heat insulation sheet, and at least one reinforcing rib is arranged on the second heat insulation sheet.

6. The novel exhaust manifold heat shield of claim 5, wherein: the first heat insulation sheet is provided with one reinforcing rib along the width direction of the first heat insulation sheet, the reinforcing rib extends to the second flanging, and the reinforcing rib is extended to the second flanging by the first heat insulation sheet along the second heat insulation sheet.

7. The novel exhaust manifold heat shield of claim 5, wherein: and the second heat insulation sheet is provided with one reinforcing rib along the width direction of the second heat insulation sheet, and the reinforcing rib extends to the second flanging.

8. The novel exhaust manifold heat shield according to any one of claims 6 or 7, wherein: the reinforcing rib is protruding or the reinforcing rib recess, the reinforcing rib is protruding or the reinforcing rib recess is the bar strengthening rib, the middle part of bar strengthening rib is oval strengthening rib, and circular arc transition is adopted on two opposite sides.

9. The novel exhaust manifold heat shield according to claim 1, wherein: the plate structure of heat shield body is sandwich three-layer construction, including the integrative stamping forming of top layer, bottom and intermediate level, the top layer with the bottom is aluminized steel sheet layer, the intermediate level is the ceramic fibre layer.

10. The novel exhaust manifold heat shield of claim 1, wherein: and warning marks for prohibiting touch are arranged on the outer surfaces of the first heat-insulating sheet and/or the second heat-insulating sheet.