Heat-proof layer restraint member and heat-proof layer installation method

Abstract

The present application discloses a heat shield restraint and a heat shield installation method, belonging to the field of aircraft molding technology. The heat shield restraint is applied to a restraint tool to assist in fitting the heat shield on the restraint tool over a load-bearing body. The heat shield restraint is in the shape of a cross, with its ends fixedly connected to the restraint tool. The heat shield restraint has a plurality of spaced-apart through-holes for glue penetration. The heat shield restraint can apply a force to the inner surface of the heat shield toward the restraint tool, allowing the outer surface of the heat shield to mate with the inner surface of the restraint tool, thereby aligning the heat shield, reducing deformation of the heat shield, and facilitating the insertion of the load-bearing body into the heat shield.

Description

Technical Field

[0001] The present application belongs to the field of aircraft forming technology, and in particular relates to a heat protection layer restraint component and a heat protection layer installation method. Background Art

[0002] Composite structural parts can form a heat-resistant layer after curing. During the curing and molding process, complex internal stresses often arise within the composite structural parts due to the synergistic effects of factors such as the thermal expansion and contraction of the material, the chemical shrinkage of the resin matrix, and the interaction between the composite material and the mold. This can cause the composite structural parts to deform after curing after demolding. For lightweight, special-shaped structures, their inherent weak rigidity and irregular surface shape exacerbate the degree of deformation.

[0003] The existence of curing deformation of the heat-proof layer will have a certain impact on subsequent processing, connection and dimensional control, and may easily cause problems such as non-fitting between connection interfaces, stress generation, and large differences in assembly dimensions.

[0004] In the related art, since the heat-proof layer is deformed during solidification, it is difficult to fit the load-bearing body inside the heat-proof layer. Summary of the Invention

[0005] The present application aims to at least to some extent solve the technical problem in the related art that the load-bearing body is difficult to be installed in the heat-proof layer. To this end, the present application provides a heat-proof layer restraint member and a heat-proof layer installation method.

[0006] In the first aspect, an embodiment of the present application provides a heat-proof layer restraint, which is applied to a restraint tooling to assist in mounting the heat-proof layer on the restraint tooling outside the load-bearing body. The heat-proof layer restraint is in a M-shape, and its end is used for fixed connection with the restraint tooling. The heat-proof layer restraint has a plurality of through holes arranged at intervals for penetrating glue.

[0007] In some embodiments, the heat protection layer restraint is made by cutting fiber cloth, and the through holes are woven meshes of the fiber cloth.

[0008] In some embodiments, the fiber yarns of the fiber cloth are woven from two or three of quartz fiber, basalt fiber, carbon fiber, aramid fiber, and aramid fiber.

[0009] In some embodiments, the length and width of the woven mesh of the fiber cloth are both 1 mm to 2 mm.

[0010] In some embodiments, the heat-protection layer restraint comprises a first extension portion, a second extension portion, and a third extension portion, wherein the first extension portion and the third extension portion are respectively located on either side of the second extension portion, and the first extension portion and the third extension portion are mirror-imaged along the second extension portion, and the second extension portion is connected to the first extension portion and the third extension portion, so that the first extension portion, the second extension portion, and the third extension portion form a cross-shaped portion.

[0011] An included angle α between the first extension portion and the second extension portion is 25° to 60°.

[0012] In a second aspect, an embodiment of the present application provides a method for installing a heat protection layer, comprising:

[0013] Prepare the heat protection layer restraint member described in the first aspect above;

[0014] Installing the heat-proof layer in the restraining fixture, and installing the load-bearing body on the adapter bracket;

[0015] Placing the middle portion of the heat-proof layer restraint member inside the heat-proof layer, and fixing the ends of the heat-proof layer restraint member outside the restraint tooling so that the heat-proof layer restraint member presses the heat-proof layer tightly;

[0016] Apply glue on the inner surface of the heat-proof layer and the outer surface of the load-bearing body;

[0017] Sheathing the load-bearing body into the heat-proof layer;

[0018] Curing treatment.

[0019] In some embodiments, the heat protection layer installation method further includes:

[0020] The load-bearing body is tried to be fitted into the heat-proof layer and the heat-proof layer restraint is adjusted so that the gap between the inner surface of the heat-proof layer and the outer surface of the load-bearing body meets the fitting requirements.

[0021] In some embodiments, applying glue on the inner surface of the heat-proof layer and the outer surface of the load-bearing body comprises:

[0022] Marking the relative positions of the heat protection layer and the heat protection layer restraint member;

[0023] Loosening one end of the heat protection layer restraint;

[0024] Applying glue to the inner surface of the heat-proof layer and the outer surface of the load-bearing body;

[0025] Fix the loosened end of the heat protection layer restraint to the restraint tooling according to the marked position.

[0026] In some embodiments, the heat protection layer installation method further includes: after the curing process, cutting and removing excess heat protection layer restraints along the end surface of the heat protection layer.

[0027] In some embodiments, the curing temperature is 0° C. to 90° C., and the curing time is 4 hours to 72 hours.

[0028] The present invention has at least the following beneficial effects:

[0029] The heat-proof layer constraint provided by the present invention is applied to the constraint tooling to assist the heat-proof layer on the constraint tooling to be sleeved outside the load-bearing body. The heat-proof layer constraint is in the shape of a cross, and its end is used to be fixedly connected to the constraint tooling. The heat-proof layer constraint has a plurality of through holes arranged at intervals for penetrating glue. The heat-proof layer constraint can apply a force toward the constraint tooling to the inner surface of the heat-proof layer, so that the outer surface of the heat-proof layer can fit with the inner surface of the constraint tooling, calibrate the heat-proof layer, reduce the deformation of the heat-proof layer, and facilitate the load-bearing body to be sleeved into the heat-proof layer. After such a design, the gap between the outer surface of the load-bearing body and the inner surface of the heat-proof layer is uniform, and the glue (the glue is located between the inner surface of the heat-proof layer and the outer surface of the load-bearing body, and is used to bond the heat-proof layer and the load-bearing body) can be relatively evenly distributed between the outer surface of the load-bearing body and the inner surface of the heat-proof layer, thereby ensuring the bonding quality between the outer surface of the load-bearing body and the inner surface of the heat-proof layer. The through holes on the restraints are used to penetrate glue. The glue can penetrate through the through holes into the interface between the heat-proof layer and the load-bearing body, thereby improving the bonding strength between the load-bearing body and the heat-proof layer and improving the uniformity of glue distribution. On the other hand, the through-hole structure can delay the loss of glue, increase the actual amount of glue retained in the bonding gap, and ensure the bonding quality between the load-bearing body and the heat-proof layer.

[0030] The heat-proof layer installation method provided by the present invention adopts the above-mentioned heat-proof layer restraint part to restrain the heat-proof layer. Through the heat-proof layer installation method of the present invention, the heat-proof layer is installed on the outside of the load-bearing part. After installation, the dimensional accuracy of the heat-proof layer and the load-bearing body can be improved by more than 90%, and the bonding quality between the heat-proof layer and the load-bearing body can be improved by more than 95%. It effectively solves the technical problems of the heat-proof layer being difficult to install outside the load-bearing body due to the deformation of the heat-proof layer during curing, poor dimensional accuracy, interference between the heat-proof layer and the load-bearing body during the installation process, and the problem of poor bonding quality between the heat-proof layer and the load-bearing body and easy debonding between the heat-proof layer and the load-bearing body. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 A schematic structural diagram of a heat protection layer restraint in one or more embodiments of the present application is shown.

[0033] Figure 2 A schematic structural diagram of the heat protection layer in one or more embodiments of the present application is shown.

[0034] Figure 3 A schematic structural diagram of a restraint tooling in one or more embodiments of the present application is shown.

[0035] Figure 4 A schematic diagram of the structure after the middle portion of the heat protection layer restraint member is placed inside the heat protection layer in one or more embodiments of the present application is shown.

[0036] Figure 5 A schematic diagram is shown after the outline of the heat protection layer restraint is drawn on the fiber cloth in one or more embodiments of the present application.

[0037] Figure 6 A flow chart of a method for installing a heat-resistant layer in one or more embodiments of the present application is shown.

[0038] Reference numerals: 100 - heat protection layer restraint, 100a - through hole, 110 - end portion, 120 - first extension portion, 130 - second extension portion, 140 - third extension portion. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship and movement status of various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] Composite structural parts can form a heat-resistant layer after curing. During the curing and molding process, complex internal stresses often arise within the composite structural parts due to the synergistic effects of factors such as the thermal expansion and contraction of the material, the chemical shrinkage of the resin matrix, and the interaction between the composite material and the mold. This can cause the composite structural parts to deform after curing after demolding. For lightweight, special-shaped structures, their inherent weak rigidity and irregular surface shape exacerbate the degree of deformation.

[0044] The existence of curing deformation of the heat-proof layer will have a certain impact on subsequent processing, connection and dimensional control, and may easily cause problems such as non-fitting between connection interfaces, stress generation, and large differences in assembly dimensions.

[0045] In the related art, since the heat-proof layer is deformed during solidification, it is difficult to fit the load-bearing body inside the heat-proof layer.

[0046] In the related art, there is a technical problem that the load-bearing body is difficult to fit inside the heat-proof layer. The embodiment of the present application provides a heat-proof layer restraint 100 and a heat-proof layer installation method, which can at least to some extent solve the technical problem that the load-bearing body is difficult to fit inside the heat-proof layer.

[0047] In some embodiments of the present application, the heat protection layer constraint member 100 and the heat protection layer installation method are used to constrain the following special-shaped heat protection layer: the density of the special-shaped heat protection layer is relatively low, which is 0.5g / cm 3 ~0.6g / cm 3 , thin thickness, thickness is 3mm~8mm, and its own rigidity is poor. From the structural point of view, Figure 2 As shown, the special-shaped heat-resistant layer is a column-segment structure as a whole, and its cross section is in the shape of a runway. Its deformation trend is that the short axis position (plane area) shrinks inward and the long axis position (arc surface area) expands outward.

[0048] The special-shaped heat shield and the load-bearing body are bonded together using a silicone rubber set. The restraint tooling only controls the outer surface of the special-shaped heat shield, and its effect on correcting the inward deformation of the special-shaped heat shield is limited. Because the load-bearing body is highly rigid and therefore has relatively good dimensions, the special-shaped heat shield deforms significantly. When fitting the load-bearing body from top to bottom, the load-bearing body cannot fit within the special-shaped heat shield. Even if it does fit, the gap between the inner surface of the special-shaped heat shield and the outer surface of the load-bearing body is small. During the fitting process, the set adhesive cannot be retained between the special-shaped heat shield and the load-bearing body, resulting in debonding.

[0049] Experiments have shown that in the process of the load-bearing body being inserted into the special-shaped heat-proof layer, if the special-shaped heat-proof layer is constrained by the heat-proof layer constraint 100 provided in the present application, the dimensional accuracy of the special-shaped heat-proof layer and the load-bearing body can be improved by more than 90% after installation, and the bonding quality between the special-shaped heat-proof layer and the load-bearing body can be improved by more than 95%. This effectively solves the technical problems of the heat-proof layer being difficult to install outside the load-bearing body due to deformation of the heat-proof layer during curing, poor dimensional accuracy, interference between the heat-proof layer and the load-bearing body during installation, and the problem of poor bonding quality between the heat-proof layer and the load-bearing body and easy debonding between the heat-proof layer and the load-bearing body.

[0050] It should be noted that the heat-proof layer restraint 100 and heat-proof layer installation method provided by the present invention can be used for the above-mentioned special-shaped heat-proof layer. Of course, it can also be used for other special-shaped heat-proof layers, which is not limited in this application.

[0051] The present application is described below with reference to specific embodiments and with reference to the accompanying drawings:

[0052] like Figure 1 As shown, the heat-proof layer restraint 100 is applied to the restraint tooling to assist in placing the heat-proof layer on the restraint tooling outside the load-bearing body. The heat-proof layer restraint 100 is in a M-shape, and its end 110 is used for fixed connection with the restraint tooling. The heat-proof layer restraint 100 has a plurality of through holes 100a arranged at intervals for penetrating glue.

[0053] Figure 3 The structural diagram of the constraint tooling is shown. The constraint tooling is used to constrain the outer surface of the heat protection layer. When the heat protection layer and the load-bearing body are assembled, the heat protection layer is installed in the constraint tooling. The inner surface of the constraint tooling controls the outer surface of the heat protection layer. The shape and size of the inner surface of the constraint tooling are adapted to the shape and size of the outer surface of the heat protection layer that has not been deformed. This is not limited in this application. Figure 2 In the structure shown, the cross-section of the inner surface of the constraining tooling is also runway-shaped.

[0054] When the heat protection layer restraint 100 is used, the middle portion of the heat protection layer restraint 100 is located inside the heat protection layer, such as Figure 4 As shown, the central area thereof contacts the inner surface of the heat-proof layer, and the end portions 110 of the heat-proof layer restraint 100 are both located outside the heat-proof layer. The end portions 110 of the heat-proof layer restraint 100 are fixedly connected to the restraint tooling, so that the central area of ​​the heat-proof layer restraint 100 is in a taut state, so that the heat-proof layer restraint 100 can exert a force on the inner surface of the heat-proof layer in the direction toward the restraint tooling, so that the outer surface of the heat-proof layer can fit with the inner surface of the restraint tooling, and the heat-proof layer is shaped to reduce the deformation of the heat-proof layer. In this way, the size of the inner surface of the heat-proof layer is guaranteed, and in the process of placing the load-bearing body into the heat-proof layer, the outer surface of the load-bearing body is not easy to interfere with the inner surface of the heat-proof layer, thereby facilitating the load-bearing body to be inserted into the heat-proof layer. After such a design, the gap between the outer surface of the load-bearing body and the inner surface of the heat-proof layer is uniform, and the glue (the glue is located between the inner surface of the heat-proof layer and the outer surface of the load-bearing body, and is used to bond the heat-proof layer and the load-bearing body) can be distributed relatively evenly between the outer surface of the load-bearing body and the inner surface of the heat-proof layer, ensuring the bonding quality between the outer surface of the load-bearing body and the inner surface of the heat-proof layer. The through hole 100a on the constraint is used to penetrate the glue, and the glue can penetrate through the through hole 100a between the interface of the heat-proof layer and the load-bearing body, ensuring the uniformity of the glue distribution and the bonding strength between the load-bearing body and the heat-proof layer. On the other hand, the through hole 100a can delay the loss of glue, which helps to increase the actual amount of glue retained in the bonding gap (i.e., the gap between the outer surface of the load-bearing body and the inner surface of the heat-proof layer), thereby also ensuring the bonding quality between the load-bearing body and the heat-proof layer.

[0055] In some embodiments, the heat-proof layer restraint 100 is made by cutting fiber cloth, and the through holes 100 a are woven meshes of the fiber cloth.

[0056] The heat-proof layer restraint 100 is made by cutting a whole piece of fiber cloth. This design ensures that the thickness of the heat-proof layer restraint 100 is consistent at all places, which helps to reduce the occupation of the heat-proof layer restraint 100 in the suit gap. The middle area of ​​the heat-proof layer restraint 100 will not be stacked, making the middle area thicker and occupying the suit gap.

[0057] Since the heat-proof layer restraint 100 needs to be fixed to the restraint tooling, and the heat-proof layer restraint 100 needs to contact the inner surface of the heat-proof layer, a certain force is applied to the inner surface of the heat-proof layer to correct the shape of the heat-proof layer. Therefore, the fiber cloth needs to meet high strength requirements, and the fiber cloth also needs to have a certain degree of deformation ability to improve the flatness of the fiber cloth when fixed at different angles. The fiber cloth also needs to have a certain wear resistance to prevent fiber breakage caused by friction during the fixing process of the heat-proof layer restraint and the restraint tooling. Therefore, in some embodiments, the fiber cloth is formed by weaving two or three of quartz fiber, basalt fiber, carbon fiber, aramid fiber and aromatic sulfone fiber, and the length and width of the woven mesh of the fiber cloth are both 1mm to 2mm (that is, the length × width of the woven mesh is 1mm to 2mm × 1mm to 2mm.). The type of quartz fiber can be type B, type C or type D. On the one hand, the mixed fiber reduces the overall fiber density to achieve lightweight requirements. On the other hand, it combines the strength, wear resistance, deformation (elongation) and other characteristics of different fibers to meet the requirements of high strength, deformation ability and certain wear resistance of the heat protection layer restraint 100.

[0058] In some embodiments, the fiber cloth has an area density of 90 g to 160 g, and a breaking strength of 400 N / 25 mm to 800 N / 25 mm.

[0059] In some embodiments, the fiber cloth has a rectangular structure and a width of 1 m to 1.65 m.

[0060] In some embodiments, the heat-resistant layer restraint 100 includes a first extension portion 120, a second extension portion 130 and a third extension portion 140, the first extension portion 120 and the third extension portion 140 are respectively located on both sides of the second extension portion 130, and the first extension portion 120 and the third extension portion 140 are mirror-imaged along the second extension portion 130, the second extension portion 130 is connected to the first extension portion 120 and the third extension portion 140, so that the first extension portion 120, the second extension portion 130 and the third extension portion 140 form a M shape; the angle α between the first extension portion 120 and the second extension portion 130 is 25° to 60°.

[0061] Specifically, if Figure 1 As shown, the first extension portion 120 is shaped like a ">", the second extension portion 130 is shaped like an "I", and the third extension portion 140 is shaped like a "<". The angle α between the first extension portion 120 and the second extension portion 130 is 25° to 60°, which can make the heat-proof layer restraint 100 have a better deformation effect.

[0062] When the heat protection layer is Figure 2In the special-shaped structure shown, in order to prevent the heat-proof layer restraint 100 from occupying too large an area of ​​the heat-proof layer and affecting the bonding quality, the widths of the first extension part 120, the second extension part 130 and the third extension part 140 are all 20mm to 40mm, and the area of ​​the region where the heat-proof layer restraint contacts the inner surface of the heat-proof layer is not greater than 30% of the total area of ​​the inner surface of the heat-proof layer.

[0063] In some embodiments, the heat-proof layer restraint 100 is made by cutting fiber cloth, and the first extension portion 120 and the third extension portion 140 are formed by beveling at 30° to 65°, such as Figure 5 Such a design of the heat-proof layer restraint member 100 has a better deformation effect, which neither causes the heat-proof layer restraint member 100 to curl and deform nor causes fiber tearing.

[0064] like Figure 6 As shown, based on the same inventive concept, an embodiment of the present application further provides a method for installing a heat protection layer, which includes steps S100, S200, S300, S400, S500, S600, S700 and S800:

[0065] S100, preparing the above-mentioned heat protection layer restraining member 100.

[0066] The heat protection layer restraining member 100 can be prepared according to the following steps:

[0067] S110, prepare a fiber cloth.

[0068] Prepare a mesh fiber cloth and draw the outline of the heat protection layer restraint member 100 on the fiber cloth, such as Figure 5 The fiber cloth is woven from two or three of quartz fiber, basalt fiber, carbon fiber, aramid fiber, and aramid sulfone. The length and width of the woven mesh of the fiber cloth are 1 mm to 2 mm by 1 mm to 2 mm, the surface density of the fiber cloth is 90 g to 160 g, and the breaking strength of the fiber cloth is 400 N / 25 mm to 800 N / 25 mm. The fiber cloth has a rectangular structure and a width of 1 m to 1.65 m.

[0069] S120 , cutting the fiber cloth to obtain the heat-proof layer restraining member 100 .

[0070] Cut according to the contour of the heat protection layer constraint 100, that is, according to Figure 5 The second extension portion 130 is cut along the dotted line, and the first extension portion 120 and the third extension portion 140 are cut along the beveled structure of 30° to 65°.

[0071] S200: Install the heat protection layer in the restraint fixture and install the load-bearing body on the adapter bracket.

[0072] Specifically, the heat protection layer is installed inside the restraining tooling, and the load-bearing body is installed on the adapter bracket. The restraining tooling fixes the heat protection layer, and the adapter bracket fixes the load-bearing body. The structures of the restraining tooling and the adapter bracket are various and are not limited in this application.

[0073] S300, such as Figure 4 As shown, the middle portion of the heat protection layer restraint 100 is placed inside the heat protection layer, and the end portion 110 of the heat protection layer restraint 100 is fixed outside the restraint tooling so that the heat protection layer restraint 100 presses the heat protection layer.

[0074] After the heat-proof layer is installed on the inner side of the restraint tooling, the middle area of ​​the heat-proof layer restraint 100 can be placed on the inner side of the heat-proof layer, and the end 110 of the heat-proof layer restraint 100 can be placed outside the heat-proof layer. Then, tighten the end 110 of the heat-proof layer restraint 100, and fix the end 110 of the heat-proof layer restraint 100 outside the restraint tooling, so that the middle area of ​​the heat-proof layer is in a taut state, thereby pressing the inner surface of the heat-proof layer and applying a force toward the restraint tooling to the inner surface of the heat-proof layer, so that the outer surface of the heat-proof layer is attached to the inner surface of the restraint tooling, reducing the deformation of the heat-proof layer. When the heat-proof layer is Figure 2 In the case of the special-shaped structure shown, the deformation trend of the special-shaped heat-proof layer is that the short axis position (plane area) shrinks inward, so two heat-proof layer restraints 100 are required, and the two heat-proof layer restraints 100 respectively restrain the two planes of the heat-proof layer.

[0075] S400, the load-bearing body is tried to be fitted into the heat-proof layer and the heat-proof layer restraint member 100 is adjusted so that the gap between the inner surface of the heat-proof layer and the outer surface of the load-bearing body meets the fitting requirement.

[0076] After the two ends of the heat-proof layer restraint 100 are fixed on the restraint tooling, the heat-proof layer is corrected. However, the corrected heat-proof layer may still not meet the needs of the load-bearing body passing through it and may still interfere with the load-bearing body. Therefore, a trial fit is required first, that is, after performing step S300, the load-bearing body is then put into the heat-proof layer. If the heat-proof layer still interferes with the fitting of the load-bearing body, the end 110 of the heat-proof layer restraint 100 is adjusted, and then the force exerted on the heat-proof layer by the middle area of ​​the heat-proof layer restraint 100 is adjusted to adjust the deformation of the heat-proof layer until the load-bearing body can be fitted into the heat-proof layer.

[0077] In some embodiments, after the load-bearing body can be fitted into the heat-proof layer, a feeler gauge is used to measure the gap between the heat-proof layer and the upper and lower ends of the load-bearing body, and the end 110 of the heat-proof layer restraint 100 is adjusted so that the gap between the upper end surface of the heat-proof layer and the upper end surface of the load-bearing body is controlled within the range of 0.7mm±0.3mm, and the gap between the lower end surface of the heat-proof layer and the lower end surface of the load-bearing body is controlled within the range of 0.7mm±0.3mm.

[0078] S500, apply glue on the inner surface of the heat-proof layer and the outer surface of the load-bearing body.

[0079] After adjusting the heat-proof layer constraint 100 so that the load-bearing body can be put into the heat-proof layer, glue can be applied to the inner surface of the heat-proof layer and the outer surface of the load-bearing body, so that after the heat-proof layer is put outside the load-bearing body, the heat-proof layer and the load-bearing body are fixed by glue.

[0080] Step S500 may include S510, S520, S530, and S540:

[0081] S510 , marking the relative positions of the heat protection layer and the heat protection layer restraining member 100 .

[0082] In step S520, one end of the heat-proof layer restraint 100 will be loosened from the restraint tooling. In step S510, the relative positions of the heat-proof layer and the heat-proof layer restraint 100 need to be marked so that step S540 can quickly fix the heat-proof layer restraint 100 to the initial position to ensure that the heat-proof layer will not interfere with the load-bearing body after step S540.

[0083] S520, loosen one end of the heat protection layer restraining member 100.

[0084] The middle area of ​​the heat-proof layer restraint 100 is in contact with the heat-proof layer. By loosening one end of the heat-proof layer restraint 100, the three upper ends or the three lower ends of the heat-proof layer restraint 100 can be loosened, so that the heat-proof layer restraint 100 can be separated from the heat-proof layer, avoiding the heat-proof layer restraint 100 from blocking the heat-proof layer, and allowing the glue to be applied to various parts of the inner surface of the heat-proof layer to ensure the quality of the bonding between the load-bearing body and the heat-proof layer.

[0085] S530: Apply glue to the inner surface of the heat-proof layer and the outer surface of the load-bearing body.

[0086] After loosening the heat-proof layer restraint 100, glue can be applied to the inner surface of the heat-proof layer and the outer surface of the load-bearing body. The glue can be epoxy glue (TZJ-62, J-319) or silicone rubber (S-1, JG-1, JG-1C), which is not limited here. In some embodiments, silicone rubber is used to bond the heat-proof layer and the load-bearing body. Silicone rubber can serve as a flexible buffer layer to alleviate the damage caused by internal stress. Before applying glue, the inner surface of the heat-proof layer and the outer surface of the load-bearing body can also be primed or cleaned with alcohol. After drying, the prepared glue can be applied to the inner surface of the heat-proof layer and the outer surface of the load-bearing body.

[0087] S540: Fix the loosened end of the heat-proof layer restraint 100 to the restraint tooling according to the marked position.

[0088] After the glue is applied, the loosened end of the heat-proof layer restraint 100 can be re-fixed on the restraint tooling, and the mark on the fixed heat-proof layer restraint 100 is aligned with the mark on the heat-proof layer to ensure that the heat-proof layer restraint 100 is fixed in the position before the heat-proof layer restraint 100 is loosened.

[0089] S600, put the load-bearing body into the heat-proof layer.

[0090] After applying the glue, the load-bearing body can be placed inside the heat-proof layer so that the heat-proof layer and the load-bearing body are bonded together.

[0091] S700, curing treatment.

[0092] The assembled load-bearing body and heat-proof layer are placed in an oven or fixed at room temperature to ensure that the heat-proof layer and the load-bearing body are firmly bonded. In some embodiments, the curing temperature is 0°C to 90°C and the curing time is 4 hours to 72 hours.

[0093] S800 , cutting and removing the redundant heat-proof layer restraining member 100 along the end surface of the heat-proof layer.

[0094] After the curing treatment, the middle area of ​​the heat-proof layer restraint 100 is fixed between the heat-proof layer and the load-bearing body. The heat-proof layer restraint 100 located outside the heat-proof layer and the load-bearing body will affect the subsequent installation of other components. Therefore, the excess heat-proof layer restraint 100 needs to be cut off, that is, the heat-proof layer restraint 100 located outside the heat-proof layer and the load-bearing body needs to be cut off.

[0095] After the redundant heat-proof layer restraining member 100 is cut off, the redundant glue accumulation on the load-bearing body and the heat-proof layer can be polished and cleaned.

[0096] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0097] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0098] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A heat protection layer restraint, characterized in that: Applied to a restraining tool to assist the heat-proof layer on the restraining tool in being sleeved outside a load-bearing body, the heat-proof layer restraining piece (100) is in a M-shape, and its end (110) is used for fixed connection with the restraining tool, and the heat-proof layer restraining piece (100) has a plurality of through holes (100a) arranged at intervals for penetrating glue; The heat-proof layer restraint (100) is made by cutting fiber cloth, and the through hole (100a) is a woven mesh of the fiber cloth.

2. The heat protection layer restraint according to claim 1, characterized in that: The fiber yarns of the fiber cloth are woven from two or three of quartz fiber, basalt fiber, carbon fiber, aramid fiber and aramid sulfone fiber.

3. The heat protection layer restraint according to claim 2, characterized in that: The length and width of the woven mesh of the fiber cloth are both 1 mm to 2 mm.

4. The heat protection layer restraint according to any one of claims 1 to 3, characterized in that: The heat-proof layer restraint (100) comprises a first extension portion (120), a second extension portion (130) and a third extension portion (140), wherein the first extension portion (120) and the third extension portion (140) are respectively located on both sides of the second extension portion (130), and the first extension portion (120) and the third extension portion (140) are arranged in a mirror image along the second extension portion (130), and the second extension portion (130) is connected to the first extension portion (120) and the third extension portion (140) so that the first extension portion (120), the second extension portion (130) and the third extension portion (140) form a cross-shaped portion; and an angle α between the first extension portion (120) and the second extension portion (130) is 25° to 60°.

5. A method for installing a heat-proof layer, characterized in that: include: Prepare the heat protection layer restraint (100) according to any one of claims 1 to 4; Installing the heat-proof layer in the restraining fixture, and installing the load-bearing body on the adapter bracket; Placing the middle portion of the heat-proof layer restraint (100) inside the heat-proof layer, and fixing the end portion (110) of the heat-proof layer restraint (100) outside the restraint tooling so that the heat-proof layer restraint (100) presses the heat-proof layer tightly; Apply glue on the inner surface of the heat-proof layer and the outer surface of the load-bearing body; Sheathing the load-bearing body into the heat-proof layer; Curing treatment.

6. The heat protection layer installation method according to claim 5, characterized in that: The heat protection layer installation method further comprises: The load-bearing body is fitted into the heat-proof layer and the heat-proof layer restraining piece (100) is adjusted so that the gap between the inner surface of the heat-proof layer and the outer surface of the load-bearing body meets the fitting requirements.

7. The heat protection layer installation method according to claim 5, characterized in that: Applying glue on the inner surface of the heat-proof layer and the outer surface of the load-bearing body includes: Marking the relative positions of the heat protection layer and the heat protection layer restraining member (100); Loosening one end of the heat protection layer restraining member (100); Applying glue to the inner surface of the heat-proof layer and the outer surface of the load-bearing body; The loosened end of the heat-proof layer restraint (100) is fixed to the restraint tooling according to the marked position.

8. The heat protection layer installation method according to claim 5, characterized in that: The heat-proof layer installation method further comprises: after the curing process, cutting and removing the redundant heat-proof layer restraining piece (100) along the end surface of the heat-proof layer.

9. The heat protection layer installation method according to claim 5, characterized in that: The temperature of the curing treatment is 0° C. to 90° C., and the time of the curing treatment is 4 hours to 72 hours.

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