CN112443384B - Heat shield and processing method thereof - Google Patents
Heat shield and processing method thereof Download PDFInfo
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- CN112443384B CN112443384B CN201910834741.2A CN201910834741A CN112443384B CN 112443384 B CN112443384 B CN 112443384B CN 201910834741 A CN201910834741 A CN 201910834741A CN 112443384 B CN112443384 B CN 112443384B
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- heat insulation
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-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J1/00—Adhesives based on inorganic constituents
- C09J1/02—Adhesives based on inorganic constituents containing water-soluble alkali silicates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
Abstract
The invention discloses a heat shield, and relates to the technical field of heat shields. The heat shield comprises a shield body and heat insulation cotton, the shield body is connected with the heat insulation cotton, the shield body comprises an air inlet section, a middle section and an exhaust section, the air inlet section is connected with the heat insulation cotton, the thickness of the shield body is 0.1-0.2mm, and the thickness of the heat insulation cotton is 5-7 mm. According to the invention, by taking SUS430 stainless steel with the thickness of 0.1-0.2mm as a cover body and glass fiber cotton with the thickness of 5-7mm as heat insulation cotton, heat insulation can be achieved, gas reaction is promoted to be complete, the requirement of light weight can be met, and the national six standards are met. The invention ensures the assembly property between the cover body and the heat insulation cotton by using the inorganic adhesive and can be firmly combined in a high-temperature environment. The preparation method of the heat shield is simple and convenient for industrial application.
Description
Technical Field
The invention relates to the technical field of heat shields, in particular to a heat shield and a processing method thereof.
Background
The exhaust system of the car is one of the important component parts of the car, it is mainly made up of exhaust pipe, cleaner, catalyst converter, muffler, and the exhaust pipe of the car and catalyst converter, etc. need the heat insulation position relatively, the prior art adopts the galvanized sheet of 0.5mm thickness to carry on the bilateral pressfitting or unilateral fastening to carrying on the simple heat insulation on one side of the hand member, but the prior art has the following disadvantage: firstly, because the temperature of the hot end of the engine is high, and peripheral pipelines are dense, the heat insulation scheme of the traditional technology is adopted, and when the vehicle is used for a long time, the peripheral pipelines are easily damaged due to incomplete heat insulation, the aging of the pipelines is accelerated, and thus faults are caused; secondly, the national emission implementation national standard is only simple heat insulation, the temperature loss in the pipe is fast, and the gas reaction is incomplete, so that the national emission standard cannot be met; and thirdly, each large host factory pushes the automobile to be light, so that the purposes of reducing weight and reducing consumption are achieved, and the weight of the whole automobile is increased by using thicker materials in the traditional heat insulation scheme.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a heat shield and a processing method thereof.
The technical scheme adopted by the invention is as follows: the utility model provides a heat shield, heat shield including the cover body and thermal-insulated cotton, the cover body with separate thermal-insulated cotton and be connected, the cover body including the section of admitting air, interlude and exhaust section, the section of admitting air be connected with thermal-insulated cotton, the thickness of the cover body be 0.1-0.2mm, thermal-insulated cotton thickness be 5-7 mm.
Preferably, the cover is made of SUS430 stainless steel.
Preferably, the heat insulation cotton is made of glass fiber cotton.
Preferably, the cover body is connected with the heat insulation cotton through inorganic adhesive.
Preferably, the cover body include left casing and right casing, left casing and right casing are connected, left casing include section A of admitting air, interlude A and exhaust section A, section A of admitting air, interlude A and exhaust section A integral type are connected, right casing including section B of admitting air, interlude B and exhaust section B, section B of admitting air, interlude B and exhaust section B integral type are connected, section A and the section B phase-match of admitting air, interlude A and interlude B phase-match, exhaust section A and exhaust section B phase-match, thermal-insulated cotton including the thermal-insulated cotton in a left side and the thermal-insulated cotton in the right side, the thermal-insulated cotton in a left side is connected with section A of admitting air, the thermal-insulated cotton in the right side is connected with section B of admitting air.
Preferably, the inorganic adhesive comprises the following components in parts by weight: by taking inorganic adhesive as a reference, 60-80 parts of water glass, 3-5 parts of starch, 6-10 parts of glycerol, 120 parts of deionized water, 80-100 parts of metal oxide, 15-20 parts of ceramic fiber and 6-8 parts of polyoxyethylene ether.
Preferably, the metal oxide is one or more of copper oxide, silicon dioxide, zirconium dioxide, titanium dioxide and boron oxide, and is calcined at 1000-.
Preferably, the diameter of the ceramic fiber is 5-8 μm, and the fiber length is 12-20 mm.
Preferably, the inorganic adhesive is prepared by the following method:
step 1): mixing 1/10 formula amount of deionized water, the formula amount of starch and polyoxyethylene ether until the starch is completely dissolved, and dripping glycerol for mixing and stirring to obtain mixed solution A;
step 2): mixing and stirring the water glass with the formula amount and the deionized water with the rest formula amount, and then adding the mixed solution A in the step 1) for mixing and stirring to obtain a mixed solution B;
step 3): mixing the metal oxide and the ceramic fiber according to the formula ratio to obtain a mixture;
step 4): mixing the mixed solution A obtained in the step 2) with the mixture obtained in the step 3) in a mass ratio of 1.2-1.5: 1.
a method of making a heat shield comprising the steps of:
step S1: manufacturing a left shell and a right shell; stretching, shaping, trimming, punching, folding, cleaning and inspecting the raw materials to obtain a left shell and a right shell;
step S2: preparing an inorganic adhesive, wherein the air inlet section A in the left shell is connected with the left heat insulation cotton through the inorganic adhesive, and the air inlet section B in the right shell is connected with the right heat insulation cotton through the inorganic adhesive;
step S3: and connecting the left shell and the right shell to obtain the heat shield.
The invention has the beneficial effects that: according to the invention, by taking SUS430 stainless steel with the thickness of 0.1-0.2mm as a cover body and glass fiber cotton with the thickness of 5-7mm as heat insulation cotton, heat insulation can be achieved, gas reaction is promoted to be complete, the requirement of light weight can be met, and the national six standards are met.
The invention ensures the assembly property between the cover body and the heat insulation cotton by using the inorganic adhesive and can be firmly combined in a high-temperature environment. The creative discovery that the polyoxyethylene ether can improve the assembly between the cover body and the heat insulation cotton.
The preparation method of the heat shield is simple and convenient for industrial application.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
101 air inlet section A, 102 middle section A, 103 air outlet section A, 201 air inlet section B, 202 middle section B, 203 air outlet section B, 1 left heat insulation cotton and 2 right heat insulation cotton
Detailed Description
Example 1: a heat shield is made of SUS430 stainless steel, the thickness of the shield body is 0.1mm, the heat insulation cotton is glass fiber cotton, the thickness of the heat insulation cotton is 5mm, the shield body and the heat insulation cotton are connected through inorganic adhesive, and the inorganic adhesive comprises 60 parts of water glass, 3 parts of starch, 6 parts of glycerol, 120 parts of deionized water, 30 parts of copper oxide, 50 parts of silicon dioxide, 15 parts of ceramic fiber and 6 parts of polyoxyethylene ether.
The preparation method of the inorganic adhesive comprises the following steps:
step 1): mixing 1/10 formula amount of deionized water, the formula amount of starch and polyoxyethylene ether until the starch is completely dissolved, and dripping glycerol for mixing and stirring to obtain mixed solution A;
step 2): mixing and stirring the water glass with the formula amount and the deionized water with the rest formula amount, and then adding the mixed solution A in the step 1) for mixing and stirring to obtain a mixed solution B;
step 3): mixing the metal oxide and the ceramic fiber according to the formula ratio to obtain a mixture;
step 4): mixing the mixed solution A obtained in the step 2) with the mixture obtained in the step 3) in a mass ratio of 1.2-1.5: 1.
example 2: similar to example 1, except that: the thickness of the cover body is 0.15mm, and the thickness of the heat insulation cotton is 6 mm.
Example 3: similar to example 1, except that: the thickness of the cover body is 0.2mm, and the thickness of the heat insulation cotton is 7 mm.
Example 4: a heat shield is characterized in that a shield body is made of SUS430 stainless steel, the thickness of the shield body is 0.15mm, heat insulation cotton is glass fiber cotton, the thickness of the heat insulation cotton is 6mm, the shield body and the heat insulation cotton are connected through inorganic adhesive, and the inorganic adhesive comprises 70 parts of water glass, 4 parts of starch, 8 parts of glycerol, 135 parts of deionized water, 80 parts of titanium dioxide, 18 parts of ceramic fiber and 6.2 parts of polyoxyethylene ether.
Example 5: a heat shield is characterized in that a shield body is made of SUS430 stainless steel, the thickness of the shield body is 0.15mm, heat insulation cotton is glass fiber cotton, the thickness of the heat insulation cotton is 6mm, the shield body and the heat insulation cotton are connected through inorganic adhesive, and the inorganic adhesive comprises 80 parts of water glass, 5 parts of starch, 10 parts of glycerol, 160 parts of deionized water, 100 parts of metal oxide, 20 parts of titanium dioxide and 8 parts of polyoxyethylene ether.
Comparative example 1: similar to example 4, except that: the heat shield is a galvanized sheet with a thickness of 0.5 mm.
Comparative example 2: a heat shield is characterized in that a shield body is made of SUS430 stainless steel, the thickness of the shield body is 0.15mm, heat insulation cotton is glass fiber cotton, the thickness of the heat insulation cotton is 6mm, the shield body and the heat insulation cotton are connected through inorganic adhesive, and the inorganic adhesive comprises 70 parts of water glass, 135 parts of deionized water, 80 parts of titanium dioxide, 18 parts of ceramic fiber and 6.2 parts of polyoxyethylene ether.
Comparative example 3: a heat shield is characterized in that a shield body is made of SUS430 stainless steel, the thickness of the shield body is 0.15mm, heat insulation cotton is glass fiber cotton, the thickness of the heat insulation cotton is 6mm, the shield body and the heat insulation cotton are connected through inorganic adhesive, and the inorganic adhesive comprises 70 parts of water glass, 4 parts of starch, 135 parts of deionized water, 80 parts of titanium dioxide and 6.2 parts of polyoxyethylene ether.
Comparative example 4: a heat shield is characterized in that a shield body is made of SUS430 stainless steel, the thickness of the shield body is 0.15mm, heat insulation cotton is glass fiber cotton, the thickness of the heat insulation cotton is 6mm, the shield body and the heat insulation cotton are connected through inorganic adhesive, and the inorganic adhesive comprises 70 parts of water glass, 4 parts of starch, 8 parts of glycerol, 135 parts of deionized water, 80 parts of titanium dioxide and 18 parts of ceramic fiber.
Test one: temperature change test
The inlet and outlet temperatures of the catalytic converter were measured with digital thermometers as close as possible to the catalytic converter (within 50 mm).
TABLE 1
| Group of | Inlet temperature (. degree.C.) | Outlet temperature (. degree.C.) | Ratio (%) |
| Example 1 | 865 | 715 | 17.34 |
| Example 2 | 867 | 732 | 15.57 |
| Example 3 | 885 | 750 | 15.25 |
| Example 4 | 862 | 742 | 13.92 |
| Example 5 | 872 | 734 | 15.83 |
| Comparative example 1 | 869 | 434 | 50.06 |
| Comparative example 2 | 872 | 667 | 23.51 |
| Comparative example 3 | 882 | 702 | 20.41 |
| Comparative example 4 | 876 | 657 | 25.00 |
Calculating the formula: ratio 1-outlet temperature/inlet temperature
As can be seen from Table 1, the ratio of the outlet temperature to the inlet temperature for examples 1-5 was 13.92-17.34, indicating that the heat shield has good thermal insulation.
And (2) test II: inorganic adhesive performance test
Tensile shear strength at 1000 ℃ and the test standard is GJB 444-
Peel strength at 1000 ℃ according to the test standard GB/T7322-1997
Flue gas and toxicity at high temperature, application Specification of International fire resistance test procedure
TABLE 2
As can be seen from Table 2, examples 1-5 have greater stability in high temperature environments, high adhesive strength, and meet the requirements for high temperature toxicity. The starch and the glycerol are added in the examples 1 to 5, the high-temperature stability and the adhesive strength of the inorganic adhesive are higher than those of the comparative example 2 (no starch is added) and the comparative example 3 (no glycerol is added), and after the examples 1 to 5 are damaged, the invention has irregular fracture surfaces, which is supposed to be because the starch can exist in an irregular form in the inorganic adhesive, and the glycerol has the moisture retention property and can strengthen the starch, so that the starch can keep an irregular state for a long time, the inorganic adhesive forms a three-dimensional network structure, and the high-temperature stability and the adhesive strength are improved.
And (3) test III: assembling property test
Before the test, the inorganic adhesive of example 1 was prepared, and then the heat insulating cotton was glued into the cover body, and accordingly, the above-described operations were performed for examples 2 to 5 and comparative examples 2 to 4. The cover body glued with the heat insulation cotton is placed in a muffle furnace at 800 ℃ for two hours every day for one month, and the automobile environment is simulated.
TABLE 3
As can be seen from Table 3, examples 1 to 5 also have good assemblability when applied to automobiles, and are consistent with the assembly between a stainless steel material (SUS430 stainless steel cover) and a porous heat insulating material (glass fiber cotton heat insulating cotton), it is observed that the exfoliated surfaces of comparative examples 2 to 3 are in a smoother state, while comparative example 4 is in a mottled state, the heat insulating cotton of comparative examples 2 and 3 are exfoliated under high temperature and long time action, while comparative example 4 is exfoliated under the condition of simultaneously adding starch and glycerin, but examples 1 to 5 still maintain good stability, which is hypothesized that the inorganic adhesive between the heat insulating cotton and the cover is reduced because the heat insulating cotton surface is in a porous structure and the cover surface is in a metal structure, and the inorganic adhesive easily enters into pores, and by adding polyoxyethylene ether to the inorganic adhesive, the polyoxyethylene ether is a surfactant, inorganic adhesive is quickly adhered to the surface of the heat shield, and the heat shield is prevented from entering the porous interior of the heat shield cotton.
Of examples 1-5, example 2 was the most effective with the following conditions: a heat shield is characterized in that a shield body is made of SUS430 stainless steel, the thickness of the shield body is 0.15mm, heat insulation cotton is glass fiber cotton, the thickness of the heat insulation cotton is 6mm, the shield body and the heat insulation cotton are connected through inorganic adhesive, and the inorganic adhesive comprises 70 parts of water glass, 4 parts of starch, 8 parts of glycerol, 135 parts of deionized water, 80 parts of titanium dioxide and 18 parts of ceramic fiber.
Claims (8)
1. A heat shield, characterized by: the heat shield comprises a shield body and heat insulation cotton, the shield body comprises an air inlet section, a middle section and an air outlet section, the air inlet section is connected with the heat insulation cotton, the thickness of the shield body is 0.1-0.2mm, and the thickness of the heat insulation cotton is 5-7 mm;
the cover body is connected with the heat insulation cotton through an inorganic adhesive;
the inorganic adhesive comprises the following components in parts by weight: by taking inorganic adhesive as a reference, 60-80 parts of water glass, 3-5 parts of starch, 6-10 parts of glycerol, 120 parts of deionized water, 80-100 parts of metal oxide, 15-20 parts of ceramic fiber and 6-8 parts of polyoxyethylene ether.
2. The heat shield of claim 1, wherein: the cover body is made of SUS430 stainless steel.
3. The heat shield of claim 1, wherein: the heat insulation cotton is made of glass fiber cotton.
4. A heat shield according to any one of claims 1-3, wherein: the cover body comprises a left shell and a right shell which are connected, the left shell comprises an air inlet section A (101), a middle section A (102) and an air exhaust section A (103), the air inlet section A (101), the middle section A (102) and the air exhaust section A (103) are integrally connected, the right shell comprises an air inlet section B (201), a middle section B (202) and an air outlet section B (203), the air inlet section B (201), the middle section B (202) and the air outlet section B (203) are integrally connected, the air inlet section A (101) is matched with the air inlet section B (201), the middle section A (102) is matched with the middle section B (202), the air outlet section A (103) is matched with the air outlet section B (203), thermal-insulated cotton including a left side thermal-insulated cotton (1) and thermal-insulated cotton (2) of right side, a left side is thermal-insulated cotton (1) and is connected with section A (101) admits air, right side is thermal-insulated cotton (2) and admits air section B (201) and is connected.
5. The heat shield of claim 1, wherein: the metal oxide is one or more of copper oxide, silicon dioxide, zirconium dioxide, titanium dioxide and boron oxide, and is calcined for 1h at the temperature of 1000-1200 ℃.
6. The heat shield of claim 1, wherein: the diameter of the ceramic fiber is 5-8 μm, and the length of the fiber is 12-20 mm.
7. The heat shield of claim 1, wherein: the inorganic adhesive is prepared by the following method:
step 1): mixing 1/10 formula amount of deionized water, 1/10 formula amount of starch and polyoxyethylene ether, stirring until the starch is completely dissolved, and dripping glycerol for mixing and stirring to obtain mixed solution A;
step 2): mixing and stirring the water glass with the formula amount and the deionized water with the rest formula amount, and then adding the mixed solution A in the step 1) for mixing and stirring to obtain a mixed solution B;
step 3): mixing the metal oxide and the ceramic fiber according to the formula ratio to obtain a mixture;
step 4): mixing the mixed solution B obtained in the step 2) and the mixture obtained in the step 3) according to the weight ratio of 1.2-1.5: 1, in a mass ratio of 1.
8. The method of making a heat shield of claim 1, wherein: the method comprises the following steps:
step S1: manufacturing a left shell and a right shell; stretching, shaping, trimming, punching, folding, cleaning and inspecting the raw materials to obtain a left shell and a right shell;
step S2: preparing an inorganic adhesive, wherein an air inlet section A (101) in a left shell is connected with a left heat insulation cotton (1) through the inorganic adhesive, and an air inlet section B (201) in a right shell is connected with a right heat insulation cotton (2) through the inorganic adhesive;
step S3: and connecting the left shell and the right shell to obtain the heat shield.
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Denomination of invention: An insulation cover and its processing method Effective date of registration: 20230726 Granted publication date: 20220315 Pledgee: Bank of China Limited Guangzhou Development Zone Branch Pledgor: GUANGZHOU TETUO NEW MATERIAL TECHNOLOGY CO.,LTD. Registration number: Y2023980049844 |
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