A new thermal insulation kit and method of manufacture

Abstract

The present application relates to exhaust pipe heat insulation technical field, specifically disclose a kind of novel heat insulation kit, including exhaust pipe, further including heat insulation pad, the connecting mechanism of symmetrical setting at heat insulation pad both ends;Heat insulation pad is wrapped on exhaust pipe;Connecting mechanism includes bendable block, clamping block, plug block, the clamping slot opened in bendable block, the insertion slot opened in clamping block, the sliding hole opened in bendable block, the resistance line set in clamping slot;Bendable block is fixedly connected with heat insulation pad;One end of clamping block is fixedly connected with the end of bendable block, and the other end of clamping block is inserted into clamping slot;Plug block is slidably connected with sliding hole, sliding hole is communicated with insertion slot, and insertion slot is located on the movement track of plug block. To solve the problem that the existing heat insulation kit can be reduced due to the limitation of connection mode, thereby reducing the quality of connection.

Description

Technical Field

[0001] This invention relates to the field of exhaust pipe heat insulation technology, specifically to a novel heat insulation kit and its preparation method. Background Technology

[0002] When a car is in motion, the exhaust pipe temperature can reach over 700℃, which can easily cause aging of surrounding wiring, lead to fires, and raise the temperature of the passenger compartment. Heat insulation kits effectively block heat, preventing damage to electrical wiring and rubber / plastic components from high temperatures, reducing the risk of burns and fire hazards, thus providing excellent thermal protection. However, when current automotive heat insulation kits are applied to the exhaust pipe, the connection points may face two main problems, primarily due to installation methods and material properties: First, if bandages or metal clips are used for fixation, long-term exposure to high temperatures and vibrations can cause fatigue, deformation, or detachment of the connectors, leading to displacement or even slippage of the heat insulation kit; second, some heat insulation kits use ordinary stitching or low-temperature adhesives for connection, which are prone to carbonization, melting, or failure under sustained high temperatures (especially since exhaust pipes can reach over 700℃).

[0003] This invention provides a novel thermal insulation kit to solve the above-mentioned problems. Summary of the Invention

[0004] This invention provides a novel thermal insulation kit to solve the problem that existing thermal insulation kits suffer from reduced connection quality due to limitations in the connection method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a novel heat insulation kit, including an exhaust pipe, a heat insulation pad, and connecting mechanisms symmetrically arranged at both ends of the heat insulation pad; the heat insulation pad is wrapped around the exhaust pipe; the connecting mechanism includes a bendable roll block, a locking block, an insert block, a slot on the bendable roll block, a slot on the locking block, a sliding hole on the bendable roll block, and resistance grooves provided in the slot; the bendable roll block is fixedly connected to the heat insulation pad; one end of the locking block is fixedly connected to the end of the bendable roll block, and the other end of the locking block extends into the slot; the insert block is slidably connected to the sliding hole, the sliding hole communicates with the slot, and the slot is located on the movement trajectory of the insert block.

[0006] The principles and advantages of this scheme are: When the thermal insulation kit is bent and fitted onto the exhaust pipe, the two ends of the bendable block are quickly secured by inserting locking blocks into the slots. This structure achieves a closed connection through mechanical interlocking without the need for additional fasteners. The resistance grooves within the slots form a micro-serrated friction structure on the contact surface, effectively increasing the friction and anti-slip performance between the locking blocks and the slots, preventing loosening due to vibration or thermal expansion and contraction.

[0007] 2. After the two ends of the bendable block are initially connected by inserting the locking blocks into the slots, the insert block is further pushed into the slot through the sliding hole, forming a lateral mechanical limiting structure. This action provides the primary connection between the locking block and the slot, while the insert block acts as a secondary locking component, preventing the locking block from loosening or exiting along the insertion direction due to vibration or thermal expansion and contraction. Furthermore, the insert block, passing between the locking block and the side wall, distributes the shear stress at the connection point, reducing the risk of localized stress concentration. Simultaneously, in conjunction with the resistance grooves within the slots, the insertion of the insert block makes it virtually impossible for the locking block to move radially or axially, greatly improving the overall structural tightness.

[0008] Furthermore, it also includes a caliper assembly; the caliper assembly includes a first wedge, a caliper block, a second wedge, a through hole in the slot, and a caliper groove in the bendable block; the first wedge is fixedly connected to the insert block; the caliper block is slidably connected to the through hole; the second wedge is fixedly connected to the caliper block, and the second wedge is located on the movement trajectory of the first wedge; the through hole communicates with the caliper groove, and the caliper block can slide in and out of the caliper groove.

[0009] When the insert block slides into the slot, its first wedge contacts and presses against the second wedge on the caliper block, thus pushing the caliper block into the caliper groove. Therefore, based on the lateral limiting of the caliper block, the slot, and the insert block, the embedding of the caliper block constitutes a precision mechanical barrier, forming a three-level locking of "basic connection - lateral limiting - lateral clamping", which greatly improves the stability of the overall structure in high-temperature, high-vibration, and difficult-to-maintain working environments (such as automotive exhaust system heat insulation kits).

[0010] Furthermore, the caliper assembly also includes a clamping part; the clamping part includes a clamping block, a third wedge, a fourth wedge, a spring, and a clamping groove opened in the caliper groove; the clamping block and the clamping groove are slidably connected; the third wedge is fixedly connected to the clamping block; the fourth wedge is fixedly connected to the caliper block, and the third wedge is located on the movement trajectory of the fourth wedge; the two ends of the spring are respectively connected to the clamping block and the clamping groove.

[0011] As the caliper block continues to slide into the caliper groove, its fourth wedge block contacts and presses against the third wedge block on the clamping block. As the thrust increases, the wedge surface converts the horizontal motion into a vertical component, pushing the clamping block vertically upward along the clamping groove, while simultaneously stretching the spring fitted on it, allowing it to store elastic potential energy.

[0012] After being stretched, the spring tends to return to its original length, creating a continuous downward elastic feedback that acts in the opposite direction on the contact surface between the clamping block and the wedge block. This ensures that the third and fourth wedge blocks remain tightly fitted, eliminating assembly gaps and improving connection rigidity. Furthermore, when external impacts or vibrations attempt to retract the caliper block, the spring releases energy, responds quickly, and applies reverse resistance, effectively suppressing the tendency to loosen and forming a passive anti-loosening mechanism. Therefore, by introducing an elastic self-tightening unit on top of the original three-level locking system, a dual guarantee of "mechanical interlocking + elastic clamping" is formed, significantly improving the reliability and durability of the connection in extreme environments (such as automotive exhaust systems, high-temperature pipeline fasteners, and other scenarios with extremely high long-term stability requirements).

[0013] Furthermore, the clamping part also includes a linkage unit; the linkage unit includes a linkage rod, a linkage hole on the clamping block, and a positioning hole on the fourth wedge block; the linkage rod is slidably connected to the linkage hole; the linkage rod is located on the movement trajectory of the linkage hole, and the linkage rod can slide in and out of the stop hole.

[0014] During the synchronous upward movement of the clamping block and the linkage rod, as the stroke progresses, the linkage rod slides in the opposite direction relative to the clamping block under the constraint of the clamping groove, resulting in a downward relative displacement, and finally precisely inserts into the positioning hole on the fourth wedge. After the linkage rod is inserted into the positioning hole, a mechanical pin-type lock is formed, effectively preventing the fourth wedge from moving or retracting in the horizontal direction, ensuring that it maintains stable contact with the third wedge and maintaining the continuity of the preload transmission path. Furthermore, even if the spring fails or the wedge surface wears, the linkage rod can still undertake part of the locking function through rigid insertion, preventing the caliper block from accidentally disengaging, achieving a fault redundancy design.

[0015] Furthermore, it also includes a positioning part; the positioning part includes a screw, a positioning block, a guide hole on the locking block, a positioning hole on the bendable block, and a power unit for driving the screw to rotate; the screw is located in the guide hole and is rotatably connected to the guide hole; the positioning block is threadedly connected to the screw and is slidably connected to the guide hole; the guide hole communicates with the positioning hole, and the positioning block can slide in and out of the positioning hole.

[0016] Driven by the screw, the positioning block extends actively and embeds into the positioning hole, forming a rigid support, which effectively restricts the lateral displacement of the block in the slot and significantly improves the shear resistance of the connection structure.

[0017] Furthermore, the positioning unit also includes an auxiliary unit; the auxiliary unit includes a gear, a first rack, an inner hole on the locking block, and an auxiliary hole on the bendable block; the guide hole communicates with the inner hole; the gear is fixedly connected to the screw; the first rack is slidably connected to the inner hole, and the first rack meshes with the gear; the inner hole communicates with the auxiliary hole, and the auxiliary hole is located on the movement trajectory of the first rack.

[0018] During screw rotation, the first rack actively inserts into the auxiliary hole under gear drive, forming a rigid axial support. This effectively prevents the locking block from axial displacement due to vibration or thermal expansion and contraction, significantly improving the connection's pull-out resistance. Furthermore, the screw's rotational motion not only drives the positioning block to achieve lateral locking but also drives the first rack to complete lateral insertion through the gear, realizing a "rotational input, bidirectional output" linkage locking mode. This allows multiple locking mechanisms to take effect simultaneously, enhancing the overall structural coordination and reliability.

[0019] Furthermore, it also includes a limiting unit; the limiting unit includes a limiting cylinder, a limiting block, and a limiting hole opened on the insert block; the limiting cylinder is fixedly connected to the side wall of the bendable block; the limiting block is slidably connected to the limiting cylinder; the limiting block is located on the movement trajectory of the limiting hole, and the limiting block can slide in and out within the limiting block.

[0020] Once the insert is fully inserted into the slot, the limiting block on the side wall of the bendable block can slide into the limiting hole at the end of the insert under external force, forming a mechanical "pin-hole" locking structure. Therefore, after the limiting block is inserted, it directly blocks the retraction path of the insert along the insertion direction, forming a physical stop and effectively preventing axial displacement or dislodgement of the insert due to vibration, thermal expansion and contraction, or mechanical impact.

[0021] Furthermore, the power unit includes a second rack and a placement slot on the insert block; the second rack is fixedly connected to the placement slot; the guide hole communicates with the slot; and the second rack meshes with a gear.

[0022] During the movement of the insert block, the second rack meshes with the gear, which in turn drives the screw to rotate.

[0023] To achieve the above objectives, the present invention adopts the following technical solution: a novel method for preparing a thermal insulation kit, characterized by comprising the following steps: Step (1): Basalt machine-made fabric pretreatment: Soak the basalt machine-made fabric in a 5% silane coupling agent KH-550 solution for 25 minutes, then dry it in a 120℃ oven for 2 hours to enhance its surface adhesion and corrosion resistance; Basalt fiber needle-punched felt pretreatment: Place the basalt fiber needle-punched felt in a high-temperature furnace and heat-treat it at 600℃ for 1 hour to remove impurities and low-melting-point components, and improve its thermal stability and mechanical properties; Silicone cloth pretreatment: Place the silicone cloth in a plasma treatment machine and treat it at 300W for 5 minutes to improve its surface activity and facilitate its composite with other materials; Step (2): Bottom layer laying: The pre-treated basalt machine-made fabric is laid flat on the workbench as the bottom layer. Its size is determined according to the length and circumference of the exhaust pipe, leaving a 10-15cm sewing allowance; Intermediate layer laying: A layer of basalt fiber needle-punched felt is evenly laid on the basalt machine-made fabric. The thickness of the needle-punched felt is 10-15mm, ensuring that it completely covers the bottom layer and that the edges are aligned with the bottom layer; Top layer laying: The pre-treated silicone cloth is covered on the basalt fiber needle-punched felt as the top layer. The size of the silicone cloth is the same as that of the bottom layer, so that the three layers of materials form a tightly bonded composite structure; Step (3): Selection of suture thread: High-temperature resistant basalt fiber yarn is selected as the suture thread, with a breaking strength ≥500N, which can maintain good mechanical properties in high-temperature environments; Sewing process: Double-needle lockstitch process is adopted, starting from one end of the composite structure, and sewing along the edge with a stitch spacing of 1-2cm to ensure that the three layers of materials are tightly bonded; During the sewing process, the curved parts are sewn with an arc-shaped sewing method so that the kit can better adapt to the shape of the exhaust pipe; After the sewing is completed, the edges are trimmed to remove excess material; Shaping treatment: The sewn heat insulation kit is placed in a hot press shaping machine and hot-pressed for 10 minutes at a temperature of 150℃ and a pressure of 2MPa to fix the shape of the kit and improve its structural stability.

[0024] Furthermore, the two connecting mechanisms are fixed to both ends of the molded thermal insulation kit.

[0025] The principles and advantages of this scheme are: 1. Excellent high temperature resistance: The heat insulation kit prepared by this invention has a long-term operating temperature of basalt fiber as its core material, which can withstand a high temperature of 700℃ and a short-term temperature of 980℃. It can effectively resist the high temperature heat of the exhaust pipe and prevent the surrounding components from being damaged by high temperature.

[0026] 2. High flexibility and adaptability: Through layered composite and integrated stitching process, the kit has good flexibility and elasticity, which can closely fit the curved parts and irregular interfaces of the exhaust pipe, leaving no blind spots and effectively reducing heat leakage.

[0027] 3. High structural stability: The high-temperature resistant yarn double-needle lockstitch process tightly bonds the three layers of materials, resulting in strong interlayer bonding. This makes it less prone to delamination or detachment during vehicle operation, and the service life can reach more than 8 years.

[0028] 4. Significant heat insulation effect: The thermal conductivity of basalt fiber needle-punched felt is as low as 0.03W / (m·K), which can effectively block heat conduction, reduce the temperature inside the engine compartment by 20-30℃, improve driving comfort, and at the same time help the exhaust pipe after-treatment system maintain a suitable operating temperature, improve catalytic reaction efficiency, and reduce pollutant emissions. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of a novel thermal insulation kit according to the present invention.

[0030] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0031] Figure 3 for Figure 1 A partial sectional view from the front view direction.

[0032] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0033] Figure 5 for Figure 3 A partial sectional view from a top-down perspective.

[0034] Figure 6 for Figure 1 A schematic diagram of a partial structure inside a bendable roll block.

[0035] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0036] Figure 8 for Figure 7 Enlarged view of point D in the middle. Detailed Implementation

[0037] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: exhaust pipe 1, heat insulation pad 2, bendable block 3, locking block 4, insert block 5, locking groove 6, slot 7, sliding hole 8, first wedge block 9, caliper block 10, second wedge block 11, caliper groove 12, clamping block 13, third wedge block 14, fourth wedge block 15, spring 16, clamping groove 17, linkage rod 18, positioning hole 19, screw 20, positioning block 21, gear 22, first rack 23, auxiliary hole 24, limiting cylinder 25, limiting block 26, limiting hole 27, and second rack 28.

[0038] The basic implementation examples are as follows: Figure 1 , 2 As shown in points 3, 4, 5, 6, 7, and 8: An embodiment of the present invention provides a novel heat insulation kit, including an exhaust pipe 1, a heat insulation pad 2, and a connecting mechanism symmetrically arranged at both ends of the heat insulation pad 2; the heat insulation pad 2 is wrapped around the exhaust pipe 1; the connecting mechanism includes a bendable roll block 3, a locking block 4, an insert block 5, a slot 6 at one end of the bendable roll block 3, a slot 7 at the locking block 4, a sliding hole 8 at the bendable roll block 3, and resistance patterns in the slot 6; the bendable roll block 3 is fixedly connected to the heat insulation pad 2; the bendable roll block 3 is bent into a circular shape to fit the exhaust pipe 1, and the two ends of the bendable roll block 3 are in contact with each other; one end of the locking block 4 is fixedly connected to one end of the bendable roll block 3, and the other end of the locking block 4 extends into the slot 6 and is in contact with the resistance patterns; the insert block 5 is slidably connected to the sliding hole 8, the sliding hole 8 communicates with the slot 7, and the slot 7 is located on the movement trajectory of the insert block 5.

[0039] It also includes a caliper assembly; the caliper assembly includes a first wedge 9, a caliper block 10, a second wedge 11, a through hole in the slot 7, and a caliper groove 12 on the bendable block 3; the first wedge 9 is fixedly connected to the insert block 5; the caliper block 10 is slidably connected to the through hole; the second wedge 11 is fixedly connected to the caliper block 10, and the second wedge 11 is located on the movement trajectory of the first wedge 9; the through hole communicates with the caliper groove 12, and the caliper block 10 can slide in and out of the caliper groove 12.

[0040] The caliper assembly also includes a clamping part; the clamping part includes a clamping block 13, a third wedge 14, a fourth wedge 15, a spring 16, and a clamping groove 17 opened in the caliper groove 12; the clamping block 13 is slidably connected to the clamping groove 17; the third wedge 14 is fixedly connected to the clamping block 13; the fourth wedge 15 is fixedly connected to the caliper block 10, and the third wedge 14 is located on the movement trajectory of the fourth wedge 15; the spring 16 is sleeved on the clamping block 13, and the two ends of the spring 16 are respectively connected to the clamping block 13 and the clamping groove 17.

[0041] The clamping part also includes a linkage unit; the linkage unit includes a linkage rod 18, a linkage hole on the clamping block 13, and a positioning hole 19 on the fourth wedge block 15; one end of the linkage rod 18 is slidably connected to the linkage hole, and the other end of the linkage rod 18 extends out of the linkage hole and is located in the clamping groove 17; the linkage rod 18 is located on the movement trajectory of the linkage hole, and the linkage rod 18 can slide in and out of the stop hole.

[0042] It also includes a positioning part; the positioning part includes a screw 20, a positioning block 21, a guide hole on the locking block 4, a positioning hole 19 on the bendable block 3, and a power unit for driving the screw 20 to rotate; the screw 20 is located in the guide hole and is rotatably connected to the guide hole; the positioning block 21 is threadedly connected to the screw 20 and is slidably connected to the guide hole; the guide hole communicates with the positioning hole 19 and the positioning block 21 can slide in and out of the positioning hole 19.

[0043] The positioning part also includes an auxiliary unit; the auxiliary unit includes a gear 22, a first rack 23, an inner hole on the locking block 4, and an auxiliary hole 24 on the bendable block 3; the guide hole communicates with the inner hole; the gear 22 is fixedly connected to the screw 20; the first rack 23 is slidably connected to the inner hole, and the first rack 23 meshes with the gear 22; the inner hole communicates with the auxiliary hole 24, and the auxiliary hole 24 is located on the movement trajectory of the first rack 23.

[0044] It also includes a limiting unit; the limiting unit includes a limiting cylinder 25, a limiting block 26, and a limiting hole 27 opened on the insert block 5; the limiting cylinder 25 is fixedly connected to the side wall of the bendable block 3; the limiting block 26 is slidably connected to the limiting cylinder 25; the limiting block 26 is located on the movement trajectory of the limiting hole 27, and the limiting block 26 can slide in and out of the limiting block 26.

[0045] The power unit includes a second rack 28 and a placement slot on the insert block 5; the second rack 28 is fixedly connected to the placement slot; the guide hole communicates with the slot 7; the second rack 28 meshes with the gear 22.

[0046] Specific implementation process: During the bending and fitting of the heat insulation kit formed by the heat insulation pad 2 and the flexible roll block 3 onto the exhaust pipe 1, the two ends of the flexible roll block 3 are quickly fixed by inserting the locking blocks 4 into the locking slots 6. This structure achieves a closed connection through mechanical interlocking without additional fasteners. The resistance grooves inside the locking slots 6 form a micro-serrated friction structure on the contact surface, effectively increasing the friction and anti-slip performance between the locking blocks 4 and the locking slots 6, preventing loosening due to vibration or thermal expansion and contraction.

[0047] After the two ends of the bendable block 3 are initially connected by inserting the locking blocks 4 into the slots 6, the insert block 5 is pushed into the slot 7, thus forming a lateral mechanical limiting structure. This action provides the primary connection between the locking blocks 4 and the slots 6, while the insert block 5 acts as a secondary locking component, preventing the locking blocks 4 from loosening or dislodging along the insertion direction due to vibration or thermal expansion and contraction. Furthermore, the insert block 5, which runs horizontally between the locking blocks 4 and the side wall, distributes the shear stress at the connection point, reducing the risk of localized stress concentration. Simultaneously, in conjunction with the resistance grooves within the slots 6, the intervention of the insert block 5 makes it virtually impossible for the locking blocks 4 to move radially or axially, greatly improving the overall structural tightness.

[0048] When the insert block 5 slides into the slot 7, its first wedge 9 contacts and presses against the second wedge 11 on the caliper block 10, thereby pushing the caliper block 10 into the caliper groove 12. Therefore, based on the lateral limiting of the caliper block 4, the slot 6, and the insert block 5, the embedding of the caliper block 10 constitutes a precision mechanical barrier, forming a three-level locking of "basic connection - lateral limiting - lateral clamping", which greatly improves the stability of the overall structure in high-temperature, strong vibration, and difficult-to-maintain working environments (such as automotive exhaust system heat insulation kits).

[0049] As the caliper block 10 continues to slide into the caliper groove 12, its fourth wedge block 15 contacts and presses against the third wedge block 14 on the clamping block 13. As the thrust increases, the wedge surface converts the horizontal motion into a vertical component force, pushing the clamping block 13 to move vertically upward along the clamping groove 17, while stretching the spring 16 fitted on it, allowing it to store elastic potential energy.

[0050] After being stretched, spring 16 tends to return to its original length, creating a continuous downward elastic feedback that acts in the opposite direction on the contact surface between the clamping block 13 and the wedge block. This ensures that the third wedge block 14 and the fourth wedge block 15 remain tightly fitted, eliminating assembly gaps and improving connection rigidity. Furthermore, when external impacts or vibrations attempt to retract the caliper block 10, spring 16 releases energy, responds quickly, and applies reverse resistance, effectively suppressing the tendency to loosen and forming a passive anti-loosening mechanism. Therefore, by introducing an elastic self-tightening unit on top of the original three-level locking system, a dual guarantee of "mechanical interlocking + elastic clamping" is formed, significantly improving the reliability and durability of the connection in extreme environments (such as automotive exhaust systems, high-temperature pipeline fasteners, and other scenarios with extremely high long-term stability requirements).

[0051] During the synchronous upward movement of the clamping block 13 and the linkage rod 18, as the stroke progresses, the linkage rod 18 slides in the opposite direction relative to the clamping block 13 under the constraint of the clamping groove 17, i.e., it generates a downward relative displacement, and finally precisely inserts into the positioning hole 19 on the fourth wedge block 15. After the linkage rod 18 is inserted into the positioning hole 19, a mechanical pin-type lock is formed, which effectively prevents the fourth wedge block 15 from moving or retracting in the horizontal direction, ensuring that it always maintains stable contact with the third wedge block 14 and maintains the continuity of the preload transmission path. Furthermore, even if the spring 16 fails or the wedge surface wears, the linkage rod 18 can still undertake part of the locking function through rigid insertion, preventing the caliper block 10 from accidentally disengaging, and realizing a fault redundancy design.

[0052] During the process of inserting the 5 into the slot 7, the second rack 28 meshes with the gear 22, which in turn drives the screw 20 to rotate. Therefore, the positioning block 21 actively extends and embeds into the positioning hole 19 under the drive of the screw 20, forming a rigid support, effectively limiting the lateral displacement of the locking block 4 in the slot 6, and significantly improving the shear resistance of the connection structure.

[0053] During the rotation of the screw 20, the first rack 23 actively inserts into the auxiliary hole 24 under the drive of the gear 22, forming a rigid axial support. This effectively prevents the locking block 4 from axial displacement due to vibration or thermal expansion and contraction, significantly improving the connection's pull-out resistance. Furthermore, the rotational movement of the screw 20 not only drives the positioning block 21 to achieve lateral locking, but also drives the first rack 23 to complete lateral insertion through the gear 22, realizing a "rotational input, bidirectional output" linkage locking mode. This allows multiple locking mechanisms to take effect simultaneously, enhancing the overall structural coordination and reliability.

[0054] Once the insert 5 is fully inserted into the slot 7, the limiting block 26 on the side wall of the bendable block 3 can slide into the limiting hole 27 at the end of the insert 5 under external force, forming a mechanical "pin-hole" locking structure. Therefore, after the limiting block 26 is inserted, it directly blocks the retraction path of the insert 5 along the insertion direction, forming a physical stop and effectively preventing the axial displacement or dislodgement of the insert 5 due to vibration, thermal expansion and contraction, or mechanical impact.

[0055] In summary, the above process, through an integrated design of mechanical linkage, multi-point constraints, elastic compensation, and passive self-locking, achieves a comprehensive and efficient improvement from basic connection to redundant protection. It also ensures working efficiency in harsh environments with high temperatures, strong vibrations, and difficult maintenance (such as automotive exhaust systems), and achieves tool-free installation, high reliability, and long service life.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A novel heat insulation kit, including an exhaust pipe, characterized in that: It also includes a heat insulation pad and a connecting mechanism symmetrically arranged at both ends of the heat insulation pad; the heat insulation pad is wrapped around the exhaust pipe; the connecting mechanism includes a bendable roll block, a locking block, an insert block, a slot on the bendable roll block, a slot on the locking block, a sliding hole on the bendable roll block, and resistance grooves set in the slot; the bendable roll block is fixedly connected to the heat insulation pad; one end of the locking block is fixedly connected to the end of the bendable roll block, and the other end of the locking block extends into the slot; the insert block is slidably connected to the sliding hole, the sliding hole communicates with the slot, and the slot is located on the movement trajectory of the insert block.

2. The novel thermal insulation kit according to claim 1, characterized in that: It also includes a caliper assembly; the caliper assembly includes a first wedge, a caliper block, a second wedge, a through hole in the slot, and a caliper groove in the bendable block; the first wedge is fixedly connected to the insert block; the caliper block is slidably connected to the through hole; the second wedge is fixedly connected to the caliper block and is located on the movement trajectory of the first wedge; the through hole communicates with the caliper groove, and the caliper block can slide in and out of the caliper groove.

3. A novel thermal insulation kit according to claim 2, characterized in that: The caliper assembly also includes a clamping part; the clamping part includes a clamping block, a third wedge, a fourth wedge, a spring, and a clamping groove opened in the caliper groove; the clamping block and the clamping groove are slidably connected; the third wedge is fixedly connected to the clamping block; the fourth wedge is fixedly connected to the caliper block, and the third wedge is located on the movement trajectory of the fourth wedge; the two ends of the spring are respectively connected to the clamping block and the clamping groove.

4. A novel thermal insulation kit according to claim 3, characterized in that: The clamping part also includes a linkage unit; the linkage unit includes a linkage rod, a linkage hole on the clamping block, and a positioning hole on the fourth wedge block; the linkage rod is slidably connected to the linkage hole; the linkage rod is located on the movement trajectory of the linkage hole, and the linkage rod can slide in and out of the stop hole.

5. A novel thermal insulation kit according to claim 1, characterized in that: It also includes a positioning part; the positioning part includes a screw, a positioning block, a guide hole on the locking block, a positioning hole on the bendable block, and a power unit for driving the screw to rotate; the screw is located in the guide hole and is rotatably connected to the guide hole; the positioning block is threadedly connected to the screw and is slidably connected to the guide hole; the guide hole communicates with the positioning hole and the positioning block can slide in and out of the positioning hole.

6. The novel thermal insulation kit and its preparation method according to claim 5, characterized in that: The positioning part also includes an auxiliary unit; the auxiliary unit includes a gear, a first rack, an inner hole on the locking block, and an auxiliary hole on the bendable block; the guide hole communicates with the inner hole; the gear is fixedly connected to the screw; the first rack is slidably connected to the inner hole and meshes with the gear; the inner hole communicates with the auxiliary hole, and the auxiliary hole is located on the movement trajectory of the first rack.

7. A novel thermal insulation kit according to claim 1, characterized in that: It also includes a limiting unit; the limiting unit includes a limiting cylinder, a limiting block, and a limiting hole opened on the insert block; the limiting cylinder is fixedly connected to the side wall of the bendable block; the limiting block is slidably connected to the limiting cylinder; the limiting block is located on the movement trajectory of the limiting hole, and the limiting block can slide in and out of the limiting block.

8. A novel thermal insulation kit according to claim 5, characterized in that: The power unit includes a second rack and a slot on the insert block; the second rack is fixedly connected to the slot; the guide hole communicates with the slot; and the second rack meshes with a gear.

9. A method for preparing a novel thermal insulation kit based on claim 4, characterized in that, Includes the following steps: Step (1): Basalt machine-made fabric pretreatment: Immerse the basalt machine-made fabric in a 5% silane coupling agent KH-550 solution for 25 minutes, then dry it in a 120℃ oven for 2 hours to enhance its surface adhesion and corrosion resistance; Basalt fiber needle-punched felt pretreatment: Place the basalt fiber needle-punched felt in a high-temperature furnace and heat-treat it at 600℃ for 1 hour to remove impurities and low-melting-point components, and improve its thermal stability and mechanical properties; Silicone cloth pretreatment: Place the silicone cloth in a plasma treatment machine and treat it at 300W for 5 minutes to improve its surface activity and facilitate its composite with other materials; Step (2): Bottom layer laying: The pre-treated basalt machine-made fabric is laid flat on the workbench as the bottom layer. Its size is determined according to the length and circumference of the exhaust pipe, leaving a 10-15cm sewing allowance; Intermediate layer laying: A layer of basalt fiber needle-punched felt is evenly laid on the basalt machine-made fabric. The thickness of the needle-punched felt is 10-15mm, ensuring that it completely covers the bottom layer and that the edges are aligned with the bottom layer; Top layer laying: The pre-treated silicone cloth is covered on the basalt fiber needle-punched felt as the top layer. The size of the silicone cloth is the same as that of the bottom layer, so that the three layers of materials form a tightly bonded composite structure; Step (3): Selection of suture thread: High-temperature resistant basalt fiber yarn is selected as the suture thread, with a breaking strength ≥500N, which can maintain good mechanical properties in high-temperature environments; Sewing process: Double-needle lockstitch process is adopted, starting from one end of the composite structure, and sewing along the edge with a stitch spacing of 1-2cm to ensure that the three layers of materials are tightly bonded; During the sewing process, the curved parts are sewn with an arc-shaped sewing method so that the kit can better adapt to the shape of the exhaust pipe; After the sewing is completed, the edges are trimmed to remove excess material; Shaping treatment: The sewn heat insulation kit is placed in a hot press shaping machine and hot-pressed for 10 minutes at a temperature of 150℃ and a pressure of 2MPa to fix the shape of the kit and improve its structural stability.

10. A novel thermal insulation kit method according to claim 9, characterized in that: The two connecting mechanisms are fixed to both ends of the molded thermal insulation kit.

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