Exhaust pipe thermal insulation material and manufacturing method

Abstract

The invention discloses an exhaust pipe thermal insulation material and a manufacturing method, the exhaust pipe thermal insulation material comprises a glass fiber layer and a ceramic fiber layer, the glass fiber layer and the ceramic fiber layer are connected through sewing, the manufacturing method comprises the following steps: step 1, preparing the ceramic fiber layer and the glass fiber layer; step 2, baking the ceramic fiber layer; 3, the ceramic fiber layer and the glass fiber layer are sewn to form the heat insulation material, the ceramic fiber layer and the glass fiber layer are adopted, the ceramic fiber belt is baked after the ceramic fiber layer is formed, the baking temperature is 200-300 DEG C, and the content of organic matter in the ceramic fiber layer is greatly reduced. And moreover, the heat insulation material does not need to be adhered by a resin adhesive, so that the phenomena of dense smoke and peculiar smell are avoided when the heat insulation material is applied to the liquefied gas machine.

Description

TECHNICAL FIELD

[0001] The present application relates to exhaust pipe heat insulation material technical field, specifically to an exhaust pipe heat insulation material and a manufacturing method. BACKGROUND

[0002] The commonly used heat insulation material for the front exhaust pipe of liquefied natural gas is an aluminum foil glass fiber tape, which is woven by ceramic fiber material and aluminum foil tape. The aluminum foil tape comprises a glass fiber layer and an aluminum foil layer. The aluminum foil tape can be directly adhered to the ceramic fiber material and sewn by glass fiber to form the commonly used aluminum foil glass fiber tape.

[0003] As described above, the prior art uses a ceramic fiber layer and an aluminum foil tape (the thickness of the tape is 0.25 mm, which comprises aluminum foil and glass fiber material and is adhered together by glue), and the ceramic fiber layer is made of inorganic materials such as AL2O3, SIO2, Fe2O3 and a certain amount of organic matter (the content of organic matter is 18%) and is processed into a tape shape. The organic matter is mainly resin glue. The aluminum foil tape also contains resin glue. The above structure is generally used for the heat insulation of the front exhaust pipe of a conventional internal combustion forklift, but when used on a liquefied natural gas forklift, the phenomenon of thick smoke and strong odor occurs due to the high-temperature volatilization of organic matter, which has a bad influence. SUMMARY

[0004] The present application aims to provide an exhaust pipe heat insulation material and a manufacturing method to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions. An exhaust pipe heat insulation material and a manufacturing method, comprising a glass fiber layer and a ceramic fiber layer, wherein the glass fiber layer and the ceramic fiber layer are connected by sewing, The manufacturing method comprises the following steps: Step 1: preparation of the ceramic fiber layer and the glass fiber layer; Step 2: baking of the ceramic fiber layer; Step 3: sewing of the ceramic fiber layer and the glass fiber layer to form the heat insulation material.

[0006] As a further solution of the present application, in step 1, the ceramic fiber layer is made by weaving ceramic fiber, and the glass fiber layer is made by weaving glass fiber.

[0007] As a further solution of the present application, the fiber length of the ceramic fiber and the glass fiber is not less than 50 mm.

[0008] As a further solution of the present application, the fiber diameter of the ceramic fiber and the glass fiber is 2-6 μm.

[0009] As a further scheme of the present application: in the step 1, the ceramic fiber comprises inorganic material and organic resin glue, the inorganic material comprises AL2O3, SiO2 and Fe2O3.

[0010] As a further scheme of the present application: the content of AL2O3 and SiO2 in the ceramic fiber material is less than 96%, and the content of Fe2O3 is less than 1%.

[0011] As a further scheme of the present application: in the step 2, the stable baking temperature of the ceramic fiber layer is 200-300℃.

[0012] As a further scheme of the present application: in the step 2, the baking time of the ceramic fiber layer is 10-20 minutes.

[0013] As a further scheme of the present application: in the step 2, the content of the organic resin glue in the ceramic fiber material after baking is not more than 7%.

[0014] Compared with the prior art, the present application has the following beneficial effects: the present application adopts ceramic fiber layer and glass fiber layer, wherein the ceramic fiber layer is baked after forming, the baking temperature is 200-300℃, and the baking time is 10-20 minutes. In this temperature range and baking time range, the resin glue in the ceramic fiber can be quickly volatilized (if the temperature is too low, the volatilization efficiency is slow, and if the temperature is too high, the woven belt is easily affected, and when the temperature is above 400℃, the texture of the heat insulation material becomes hard, which is not conducive to market application of winding wrapping). The content of organic matter in the ceramic fiber layer is greatly reduced. Moreover, the present application does not need resin glue for bonding, so that the heat insulation material of the present application used on the liquefied gas machine will not appear the phenomenon of thick smoke and peculiar smell. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The present application is a structure schematic diagram of the heat insulation material; In the figure: 1-glass fiber layer, 2-ceramic fiber layer. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0017] Embodiment 1 Please refer to Figure 1In this embodiment of the invention, an exhaust pipe heat insulation material and its manufacturing method include a glass fiber layer 1 and a ceramic fiber layer 2, wherein the glass fiber layer 1 and the ceramic fiber layer 2 are connected by sewing. The manufacturing method includes the following steps: Step 1: Preparation of ceramic fiber layer and glass fiber layer. The ceramic fiber layer is made by ceramic fiber weaving, and the glass fiber layer is made by glass fiber weaving. The fiber length of the ceramic fiber and glass fiber is not less than 50 mm, and the fiber diameter of the ceramic fiber and glass fiber is 2 μm. The ceramic fiber includes inorganic materials and organic resin glue. The inorganic materials include Al2O3, SiO2, and Fe2O3. Step 2: The ceramic fiber layer is baked at a stable temperature of 200°C for 10 minutes. After baking, the organic resin glue content in the ceramic fiber material is 6%, the Al2O3 and SiO2 content in the ceramic fiber material is less than 96%, and the Fe2O3 content is less than 1%. Step 3: Sew the ceramic fiber layer and the glass fiber layer together to form a thermal insulation material.

[0018] Example 2 Please see Figure 1 In this embodiment of the invention, an exhaust pipe heat insulation material and its manufacturing method include a glass fiber layer 1 and a ceramic fiber layer 2, wherein the glass fiber layer 1 and the ceramic fiber layer 2 are connected by sewing. The manufacturing method includes the following steps: Step 1: Preparation of ceramic fiber layer and glass fiber layer. The ceramic fiber layer is made by weaving ceramic fibers, and the glass fiber layer is made by weaving glass fibers. The fiber length of the ceramic fibers and glass fibers is not less than 50 mm, and the fiber diameter of the ceramic fibers and glass fibers is 4 μm. The ceramic fibers include inorganic materials and organic resin adhesive. The inorganic materials include Al2O3, SiO2, and Fe2O3. Step 2: The ceramic fiber layer is baked at a stable temperature of 250°C for 15 minutes. After baking, the organic resin glue content in the ceramic fiber material is 5.5%, the Al2O3 and SiO2 content in the ceramic fiber material is less than 96%, and the Fe2O3 content is less than 1%. Step 3: Sew the ceramic fiber layer and the glass fiber layer together to form a thermal insulation material.

[0019] Example 3 Please see Figure 1 In this embodiment of the invention, an exhaust pipe heat insulation material and its manufacturing method include a glass fiber layer 1 and a ceramic fiber layer 2, wherein the glass fiber layer 1 and the ceramic fiber layer 2 are connected by sewing. The manufacturing method includes the following steps: Step 1: Preparation of ceramic fiber layer and glass fiber layer. The ceramic fiber layer is made by ceramic fiber weaving, and the glass fiber layer is made by glass fiber weaving. The fiber length of the ceramic fiber and glass fiber is not less than 50 mm, and the fiber diameter of the ceramic fiber and glass fiber is 6 μm. The ceramic fiber includes inorganic materials and organic resin adhesive. The inorganic materials include Al2O3, SiO2, and Fe2O3. Step 2: The ceramic fiber layer is baked at a stable temperature of 300°C for 20 minutes. After baking, the organic resin glue content in the ceramic fiber material is 5%, the Al2O3 and SiO2 content in the ceramic fiber material is less than 96%, and the Fe2O3 content is less than 1%. Step 3: Sew the ceramic fiber layer and the glass fiber layer together to form a thermal insulation material.

[0020] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat insulation material for exhaust pipes and a method for manufacturing it, characterized in that, It includes a glass fiber layer 1 and a ceramic fiber layer 2, which are connected by sewing. The manufacturing method includes the following steps: Step 1: Preparation of ceramic fiber layer and glass fiber layer; Step 2: Bake the ceramic fiber layer; Step 3: Sew the ceramic fiber layer and the glass fiber layer together to form a thermal insulation material.

2. The exhaust pipe insulation material and manufacturing method according to claim 1, characterized in that, In step 1, the ceramic fiber layer is made by weaving ceramic fibers, and the glass fiber layer is made by weaving glass fibers.

3. The exhaust pipe insulation material and manufacturing method according to claim 2, characterized in that, The length of the ceramic fiber and glass fiber is not less than 50 mm.

4. The exhaust pipe insulation material and manufacturing method according to claim 2, characterized in that, The diameter of the ceramic fiber and glass fiber is 2-6 μm.

5. The exhaust pipe insulation material and manufacturing method according to claim 1, characterized in that, In step 1, the ceramic fiber includes inorganic materials and organic resin adhesive, wherein the inorganic materials include Al2O3, SiO2, and Fe2O3.

6. The exhaust pipe insulation material and manufacturing method according to claim 5, characterized in that, The ceramic fiber material contains less than 96% Al2O3 and SiO2, and less than 1% Fe2O3.

7. The exhaust pipe insulation material and manufacturing method according to claim 1, characterized in that, In step 2, the ceramic fiber layer is baked at a stable temperature of 200-300℃.

8. The exhaust pipe insulation material and manufacturing method according to claim 1, characterized in that, In step 2, the ceramic fiber layer is baked for 10-20 minutes.

9. The exhaust pipe insulation material and manufacturing method according to claim 6, characterized in that, In step 2, the organic resin glue content in the ceramic fiber material after baking does not exceed 7%.

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