Heat shield structure of automobile catalytic converter

Abstract

The utility model relates to the technical field of automobile spare parts, in particular to an automobile catalyst heat shield structure, which comprises a shield body, a heat shield cover and a heat shield cover, the shield body comprises an upper shield body and a lower shield body which are detachably connected with each other, and a containing cavity capable of covering a three-way catalyst is formed between the upper shield body and the lower shield body; the heat insulation pieces are detachably connected into the cover body and located between the inner wall of the cover body and the three-way catalyst, and the adjacent heat insulation pieces are tightly attached to each other; the fixing piece is arranged in the cover body and used for fixing the heat insulation pieces, and the problems that when a traditional heat insulation cover is of an integral structure, the heat insulation cover is damaged due to a high-temperature environment or the original heat insulation performance cannot be normally kept, only the whole heat insulation cover can be replaced, and the overall maintenance cost of the three-way catalyst is increased are solved.

Description

Technical Field

[0001] This application relates to the technical field of automotive parts, and specifically discloses a heat insulation cover structure for an automotive catalytic converter. Background Art

[0002] The three-way catalytic converter is the most important off-vehicle purification device installed in the automotive exhaust system. It can convert harmful gases such as CO, HC, and NO discharged from vehicle exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. When the high-temperature vehicle exhaust passes through the purification device, the purifying agent in the three-way catalytic converter enhances the activity of the three gases of CO, HC, and NOx, prompting them to undergo a certain oxidation-reduction chemical reaction. Among them, CO is oxidized into colorless and non-toxic carbon dioxide gas at high temperature; HC compounds are oxidized into water (H2O) and carbon dioxide at high temperature; NO x is reduced to nitrogen and oxygen. The three harmful gases become harmless gases, purifying the vehicle exhaust. x The temperature of vehicle exhaust is relatively high, and the temperature required for the oxidation-reduction of gases such as CO, HC, and NO in the three-way catalytic converter is relatively high, making the inside of the three-way catalytic converter in a high-temperature working condition. In order to maintain the internal environment temperature of the three-way catalytic converter and prevent the high-temperature environment from damaging other automotive parts, it is usually necessary to configure a heat insulation cover outside the three-way catalytic converter for protection. Currently, most heat insulation covers are of an integral structure, and a heat insulation layer is added between the heat insulation cover and the three-way catalytic converter to block heat transfer. However, due to the relatively high working temperature inside the three-way catalytic converter, the heat insulation cover is easily affected by the high-temperature environment and its service life is reduced. And because the existing heat insulation cover is of an integral structure, when the heat insulation cover is damaged due to the high-temperature environment or cannot normally maintain its original heat insulation performance, only the entire heat insulation cover can be replaced, resulting in an increase in the overall maintenance cost of the three-way catalytic converter.

[0003] The temperature of vehicle exhaust is relatively high, and the temperature required for the oxidation-reduction of gases such as CO, HC, and NO in the three-way catalytic converter is relatively high, x making the inside of the three-way catalytic converter in a high-temperature working condition. In order to maintain the internal environment temperature of the three-way catalytic converter and prevent the high-temperature environment from damaging other automotive parts, it is usually necessary to configure a heat insulation cover outside the three-way catalytic converter for protection. Currently, most heat insulation covers are of an integral structure, and a heat insulation layer is added between the heat insulation cover and the three-way catalytic converter to block heat transfer. However, due to the relatively high working temperature inside the three-way catalytic converter, the heat insulation cover is easily affected by the high-temperature environment and its service life is reduced. And because the existing heat insulation cover is of an integral structure, when the heat insulation cover is damaged due to the high-temperature environment or cannot normally maintain its original heat insulation performance, only the entire heat insulation cover can be replaced, resulting in an increase in the overall maintenance cost of the three-way catalytic converter.

[0004] Therefore, in view of this, the inventor provides a heat insulation cover structure for an automotive catalytic converter to solve the above problems. Utility Model Content

[0005] The purpose of the present utility model is to solve the problem that when the traditional heat insulation cover adopts an integral structure and the heat insulation cover is damaged due to the high-temperature environment or cannot normally maintain its original heat insulation performance, only the entire heat insulation cover can be replaced, increasing the overall maintenance cost of the three-way catalytic converter.

[0006] To achieve the above purpose, the basic scheme of the present utility model provides a heat insulation cover structure for an automotive catalytic converter, including:

[0007] The cover body includes an upper cover body and a lower cover body that are detachably connected to each other, and a cavity that can cover the three-way catalytic converter is formed between the upper cover body and the lower cover body;

[0008] A plurality of heat insulation members are detachably connected inside the cover body and are located between the inner wall of the cover body and the three-way catalytic converter, and adjacent heat insulation members are closely attached to each other;

[0009] The fixing member is arranged inside the cover body and is used to fix each of the heat insulation members.

[0010] Furthermore, the heat insulation member includes a plurality of U-shaped heat insulation plates that are staggered and buckled with each other, and the ends of the U-shaped heat insulation plates near the three-way catalytic converter are attached to each other.

[0011] Furthermore, an elastic layer is provided between adjacent side surfaces of the U-shaped heat insulation plate close to the inner wall of the cover body.

[0012] Furthermore, the elastic layer is arranged on the inner wall of the cover body or the outer side wall of the U-shaped heat insulation plate.

[0013] Furthermore, ear plates that are adapted to each other are provided at the ends of the upper cover body and the lower cover body, and the fixing member includes a baffle plate arranged on the ear plate and capable of fitting with the end of the U-shaped heat insulation plate and a fixing bolt for fixing the baffle plate to the ear plate.

[0014] Furthermore, bolt holes corresponding in position are provided on the ear plate, and fixing holes corresponding to the positions of the bolt holes are provided on the baffle plate.

[0015] Furthermore, the baffle plate is slidably connected to the ear plate, and a retaining edge that is buckled with the baffle plate is provided at the peripheral end of the ear plate.

[0016] The principle and effect of this solution are as follows:

[0017] Compared with the prior art, the utility model plays a role in heat preservation and heat insulation inside the three-way catalytic converter through the cooperation of a plurality of heat insulation members arranged between the cover body and the three-way catalytic converter. When the performance of one or some of the heat insulation members is affected, only the corresponding heat insulation member needs to be replaced, rather than replacing the entire heat insulation cover, thereby reducing the maintenance cost of the three-way catalytic converter.

[0018] Compared with the prior art, in the utility model, the U-shaped heat insulation plates are buckled with each other, which facilitates the installation and disassembly of each heat insulation part. At the same time, a baffle is provided to install and fix the U-shaped heat insulation plate to the cover body, preventing the U-shaped heat insulation plate from loosening during use and affecting the heat insulation effect. And through the positioning of the fixing holes on the baffle, when the fixing bolts fix the upper cover body and the lower cover body, the baffle is also fixed, and it is ensured that the baffle plays a fixing role on the U-shaped heat insulation plate, preventing the position of the baffle from deviating during the use of the three-way catalytic converter and affecting the matching accuracy of the U-shaped heat insulation plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 FIG. shows a schematic diagram of a heat insulation cover structure of an automobile catalytic converter proposed in an embodiment of the present application;

[0021] Figure 2 FIG. shows an internal schematic diagram of a heat insulation cover structure of an automobile catalytic converter proposed in an embodiment of the present application;

[0022] Figure 3 FIG. shows an enlarged internal view of a heat insulation cover structure of an automobile catalytic converter proposed in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, describe in detail the specific embodiments, structures, features and effects of the present utility model as follows.

[0024] The reference numerals in the accompanying drawings of the specification include: connection port 1, upper cover body 2, lower cover body 3, ear plate 4, fixing bolt 5, reinforcing rib 6, baffle 7, first U-shaped heat insulation plate 8, second U-shaped heat insulation plate 9, fixing hole 10, bolt hole 11, baffle 12.

[0025] A heat insulation cover structure of an automobile catalytic converter, as shown in the embodiments Figure 1 shown: It includes a cover body, a plurality of heat insulation parts arranged in the cover body, and fixing parts for fixing each heat insulation part, specifically as follows:

[0026] The cover body includes an upper cover body 2 and a lower cover body 3 that are detachably connected to each other. Reinforcing ribs 6 are provided on the outer parts of the upper cover body 2 and the lower cover body 3. The upper cover body 2 and the lower cover body 3 are detachably and fixedly connected to each other through ear plates 4 provided at the ends of the upper cover body 2 and the lower cover body 3, bolt holes 11 provided on the ear plates 4, and fixing bolts 5, nuts, and gaskets, etc. A cavity that can cover the three-way catalytic converter is formed between the upper cover body 2 and the lower cover body 3. Connection ports 1 for connecting the automobile exhaust emission pipes are respectively provided at both ends of the cover body. The connection port 1 is integrally formed by welding with either the upper cover body 2 or the lower cover body 3.

[0027] As Figure 2 and Figure 3 shown, the heat insulation member includes a number of U-shaped heat insulation plates that are interlaced and buckled with each other. For the convenience of description, in this embodiment, the first U-shaped heat insulation plate 8 faces the cover body at the back, and the second U-shaped heat insulation plate 9 faces the three-way catalytic converter at the back. The ends of the second U-shaped heat insulation plate 9 are mutually attached. An elastic layer is provided between adjacent side surfaces of the first U-shaped heat insulation plate 8. The elastic layer can be provided on the inner wall of the cover body or the outer side wall of the first U-shaped heat insulation plate 8 by means of gluing. Both the first U-shaped heat insulation plate 8 and the second U-shaped heat insulation plate 9 are made of heat insulation materials.

[0028] The fixing member includes a baffle 7 provided on the ear plate 4 and capable of fitting with the ends of the first U-shaped heat insulation plate 8 and the second U-shaped heat insulation plate 9, and a fixing bolt 5 for fixing the baffle 7 to the ear plate 4. The fixing bolt 5 is the fixing bolt 5 for fixing the ear plates 4 of the upper cover body 2 and the lower cover body 3 to each other. Correspondingly, the baffle 7 is slidably connected to the ear plate 4. A retaining edge that buckles with the baffle 7 and plays a role in limiting and guiding the sliding of the baffle 7 is provided at the peripheral end of the ear plate 4. A fixing hole 10 corresponding to the position of the bolt hole 11 is provided on the baffle 7.

[0029] During the implementation of this embodiment, when maintenance needs to be carried out on the three-way catalytic converter, by disassembling the fixing bolt 5, nut, gasket, etc., the upper cover body 2 and the lower cover body 3 can be separated from each other. By pulling the baffle 7, the blocking effect of the baffle 7 on the first U-shaped heat insulation plate 8 and the second U-shaped heat insulation plate 9 can be released, so that each of the first U-shaped heat insulation plate 8 and the second U-shaped heat insulation plate 9 can be inspected. When the service performance of one or some of the first U-shaped heat insulation plates 8 and the second U-shaped heat insulation plates 9 is affected, the corresponding first U-shaped heat insulation plate 8 and second U-shaped heat insulation plate 9 can be replaced separately, and there is no need to replace the entire heat insulation cover, thereby reducing the maintenance cost of the three-way catalytic converter. After the inspection of the first U-shaped heat insulation plate 8 and the second U-shaped heat insulation plate 9 is completed, the baffle 7 is inserted again so that the fixing hole 10 on the baffle 7 corresponds to the position of the bolt hole 11 on the ear plate 4, and then the upper cover body 2, the lower cover body 3, and the baffle 7, etc. can be fixedly connected to each other through the fixing bolt 5, nut, gasket, etc.

[0030] This embodiment solves the problem that the traditional heat shield adopts an integral structure, resulting in the heat shield being damaged in a high-temperature environment or unable to maintain its original heat insulation performance normally. In this case, only the entire heat shield can be replaced, increasing the overall maintenance cost of the three-way catalytic converter.

[0031] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An automotive catalytic converter heat shield structure, characterized in that, Comprising: A cover body, including an upper cover body and a lower cover body that are detachably connected to each other, and a cavity that can cover the three-way catalytic converter is formed between the upper cover body and the lower cover body; A plurality of heat insulation members, detachably connected inside the cover body and located between the inner wall of the cover body and the three-way catalytic converter, and adjacent heat insulation members are closely attached to each other; A fixing member, provided inside the cover body and used to fix each of the heat insulation members.

2. The structure of a heat shield for an automotive catalytic converter according to claim 1, characterized in that, The heat insulation member includes a plurality of U-shaped heat insulation plates that are staggered and buckled with each other, and the ends of the U-shaped heat insulation plates near the three-way catalytic converter are attached to each other.

3. The structure of an automotive catalytic converter heat shield according to claim 2, characterized in that, An elastic layer is provided between adjacent side surfaces of the U-shaped heat insulation plate near the inner wall of the cover body.

4. The structure of an automotive catalytic converter heat shield according to claim 3, characterized in that, The elastic layer is provided on the inner wall of the cover body or the outer side wall of the side surface of the U-shaped heat insulation plate.

5. The structure of a heat shield for an automotive catalytic converter according to claim 2, wherein, Ear plates that are adapted to each other are provided at the ends of the upper cover body and the lower cover body, and the fixing member includes a baffle plate provided on the ear plate and capable of fitting with the end of the U-shaped heat insulation plate and a fixing bolt for fixing the baffle plate to the ear plate.

6. The structure of an automotive catalytic converter heat shield according to claim 5, characterized in that, Bolt holes corresponding in position are provided on the ear plate, and fixing holes corresponding to the positions of the bolt holes are provided on the baffle plate.

7. The structure of an automobile catalytic converter heat shield according to claim 6, characterized in that The baffle plate is slidably connected to the ear plate, and a retaining edge that is buckled with the baffle plate is provided at the peripheral end of the ear plate.

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