High-temperature non-metal compensator applied to expansion joint

Abstract

The high-temperature nonmetal compensator comprises a compensator body, the compensator body is composed of two butt joint frames and a plurality of high-temperature dustproof bodies, the high-temperature dustproof bodies are distributed on the peripheries of the butt joint frames, the two butt joint frames are combined and connected, and the high-temperature dustproof bodies are used for absorbing axial displacement and resetting. The high-temperature dustproof body comprises an inner-layer heat insulation body, a welding bolt assembly and a heat insulation body pressing plate, the heat insulation body and the butt-joint frame are fixedly connected through the bolt assembly and the pressing plate, the high-temperature dustproof body further comprises a straight plate fixed to the outer wall of the butt-joint frame, and the tail end of the straight plate is perpendicularly bent and connected with a telescopic body installed in a covering mode through a bolt; and the connecting flange and the connecting plate are arranged on the outer side of the straight plate, the heat insulation sleeve and the heat insulation cotton are arranged between the connecting flange and the butt joint frame for filling, the heat insulation performance is improved, and the heat insulation cotton synchronously wraps the grabbing nails. The expansion joint has good high-temperature resistance, heat insulation, expansion and sealing performance and is suitable for expansion joint connection of a high-temperature pipeline system.

Description

Technical Field

[0001] This application relates to the field of high-temperature expansion joints, and more particularly to a high-temperature non-metallic compensator for use in expansion joints. Background Technology

[0002] In large pipeline systems across industries such as thermal energy engineering, metallurgy, power, petrochemicals, cement, steel, and shipbuilding, equipment operates under complex conditions including high temperature, high pressure, high dust, and high corrosion. The significant effects of thermal expansion and contraction can easily lead to stress concentration at pipeline connections, causing problems such as seal failure, pipeline damage, or equipment failure. To effectively address axial, lateral, or angular displacements caused by thermal expansion and contraction, expansion joints are typically installed at pipeline connections to absorb thermal deformation and displacement, ensuring stable system operation.

[0003] Currently, widely used expansion joints are mainly divided into two categories: metal expansion joints and non-metal expansion joints. Metal expansion joints, such as bellows expansion joints, have excellent elasticity and pressure resistance, making them suitable for high-pressure and high-temperature environments. However, their manufacturing cost is relatively high, and due to the influence of structural stiffness, they require a large installation space. Furthermore, they are prone to fatigue damage in highly corrosive or complex vibration environments.

[0004] In contrast, non-metallic expansion joints, also known as flexible fabric compensators, are widely used in long-span, large-displacement, low-to-medium pressure, and high-temperature pipeline systems due to their advantages such as simple structure, light weight, convenient installation and maintenance, low price, and superior compensation performance. Non-metallic expansion joints are typically composed of high-performance fiber cloth, high-temperature resistant insulation materials, and a support frame. Their main materials possess good flexibility and heat resistance, effectively absorbing thermal displacement and mechanical vibration, and also have a certain degree of corrosion resistance and thermal insulation.

[0005] However, existing non-metallic compensators still have the following technical problems:

[0006] Poor sealing performance: Due to the inherent softness of non-metallic materials and insufficient design of connection structures, some non-metallic compensators are prone to leakage under high temperature or thermal expansion environments. Especially when the dust concentration in the pipeline is high, dust and gas can easily leak through the connection gaps, affecting the safe operation of the equipment.

[0007] Limited high temperature resistance: The upper limit of the operating temperature of some non-metallic compensators is limited by the material properties. Once the temperature limit is exceeded, the material may carbonize, deform or even burn, leading to the failure of the compensator structure and affecting the thermal compensation function of the pipeline system.

[0008] Limited compensation capacity: Conventional non-metallic compensators are mostly designed for unidirectional axial compensation, which is insufficient for multi-directional and multi-degree-of-freedom displacement compensation. Especially in complex thermal expansion paths of the system, structural tensile limitations or fatigue failure often occur.

[0009] Complex structural assembly and difficult disassembly: The connection method of some compensators is complicated, which not only affects the construction efficiency, but also increases the cost of later maintenance and replacement.

[0010] Poor thermal insulation performance: Some non-metallic compensators lack efficient thermal insulation design, and heat can easily be conducted to the outside through the connection, posing a potential safety hazard to surrounding equipment and personnel.

[0011] Insufficient stability of connection parts: In traditional structures, the connecting flanges, gaskets and other parts are prone to thermal fatigue aging after long-term high-temperature operation, which affects the connection strength and overall sealing performance.

[0012] To address the aforementioned issues, there is an urgent need for a new type of high-temperature non-metallic compensator with a superior structure that can ensure high-temperature sealing performance while also providing excellent axial compensation, thermal insulation, structural stability, and ease of construction.

[0013] This application proposes a high-temperature non-metallic compensator for expansion joints. Structurally, through a rational combination of a mating frame and a high-temperature dustproof body, along with various components such as a telescopic body, clamping flange, connecting flange, insulation sleeve, arched plate, and insulation cotton, a novel compensation structure with good stability, strong thermal compensation capacity, and excellent sealing and insulation performance is constructed. It can be widely used in expansion joint connections in complex high-temperature and dusty environments and has good prospects for widespread application. Utility Model Content

[0014] To address the shortcomings in axial compensation, thermal insulation, structural stability, and ease of construction of expansion joints during operation, this application provides a high-temperature non-metallic compensator for use in expansion joints.

[0015] The high-temperature non-metallic compensator for expansion joints provided in this application adopts the following technical solution:

[0016] A high-temperature non-metallic compensator for use in expansion joints includes a compensator body, the compensator body comprising a docking frame and several high-temperature dustproof bodies;

[0017] Several high-temperature dustproof bodies are evenly distributed around the two docking frames. The high-temperature dustproof bodies connect the two docking frames in a combined manner. The two docking frames use high-temperature dustproof bodies to buffer and absorb axial displacement and reset.

[0018] The high-temperature dustproof body seals the connection point between the two docking frames.

[0019] Regarding the above-mentioned technical solutions, the combination of the docking frame and the high-temperature dustproof body effectively absorbs and buffers the axial thermal displacement of the pipeline. Several high-temperature dustproof bodies are evenly distributed around the docking frame, which not only enhances the flexible connection performance of the structure, allowing the compensator to deform and return to its original position smoothly during the thermal expansion and contraction of the pipeline, but also plays a good sealing role, effectively preventing the leakage of high-temperature gases, dust and other media. The high-temperature dustproof body has excellent high-temperature resistance and corrosion resistance, which improves the stability and service life of the entire compensator under extreme working conditions. The overall structure is compact, which is convenient for on-site assembly and maintenance. It is suitable for pipeline system connection scenarios with high temperature, high dust and high frequency vibration, and has three core functions: compensation, sealing and protection.

[0020] Optionally, the high-temperature dustproof body includes an inner heat insulation body, a welding bolt assembly, and a heat insulation body pressure plate. The two ends of the inner heat insulation body are respectively connected to the docking frame. The two ends of the inner heat insulation body are respectively connected by a welding bolt assembly and a heat insulation body pressure plate. The welding bolt assembly and the heat insulation body pressure plate connect the inner heat insulation body and the two docking frames.

[0021] Regarding the above-mentioned technical solutions, the inner heat insulation body, welded bolt assembly, and heat insulation pressure plate achieve the functions of high-temperature heat insulation and stable connection of the structure. As the core heat insulation component, the inner heat insulation body effectively blocks the outward conduction of high-temperature medium, improves the overall thermal stability of the compensator, and avoids damage to external structural components caused by high temperature. The combination and fixing method of the welded bolt assembly and the heat insulation pressure plate ensures a firm connection between the inner heat insulation body and the docking frame, enhances the structural strength, facilitates assembly and disassembly, and improves the convenience of maintenance. It not only improves the heat insulation performance of the compensator, but also ensures the sealing and mechanical strength of the connection parts.

[0022] Optionally, the high-temperature dustproof body includes a straight plate, one end of which is fixed to the outer wall of the docking frame, and the other end of which extends outward. The other ends of the two adjacent straight plates of the docking frame are bent vertically outward, and a telescopic body is installed on the upper end of the bent position. The two ends of the telescopic body are respectively fixedly connected to the bent positions of the two straight plates with bolts.

[0023] Regarding the above-mentioned technical solutions, a straight plate structure is used, with one end fixed to the outer wall of the docking frame and the other end extending outward and bending vertically. An expansion joint is then installed at the bend and fixed with bolts, achieving excellent structural buffering and thermal expansion / contraction adaptation. This combination of bending and expansion joint design allows the compensator to effectively absorb axial or slight radial displacement caused by thermal stress in pipelines under high-temperature operating conditions, ensuring that the connection points are not damaged by strong tensile or compressive stresses. Simultaneously, it improves the structure's flexibility and sealing reliability. The expansion joint further enhances the structure's elastic recovery capability, allowing the compensator to quickly rebound and reset after deformation, adapting to high-frequency thermal change conditions and extending its service life.

[0024] Optionally, the bolts are fitted onto the clamping flange, and the clamping flange is pressed tightly against the expansion joint.

[0025] Optionally, a horizontally extending connecting flange is provided on the outer side of the straight plate, and a second connecting plate is provided on the side of the connecting flange away from the docking frame. The second connecting plate is perpendicular to the connecting flange and extends outward.

[0026] Optionally, two adjacent connecting plates are connected together by double-headed bolt assemblies of equal length at their top ends, and nuts are provided at both ends of the double-headed bolt assembly to fix the double-headed bolt assembly and the top ends of the two adjacent connecting plates together.

[0027] To address the aforementioned technical solution, by installing equal-length double-headed bolt assemblies on the top of two adjacent connecting plates and securing them with nuts, a high-strength and stable connection function is achieved at the connection point of the compensator structure. The double-headed bolt assemblies effectively disperse concentrated stress caused by thermal expansion and contraction or medium pressure, enhancing the mechanical strength and fatigue resistance of the connection area. The equal-length design ensures consistent stress distribution between the two connecting plates, preventing local loosening or deformation due to installation deviations or loose connections. This improves the maintenance efficiency and replaceability of the compensator, making it suitable for industrial pipeline systems that require frequent maintenance or are subject to cyclical heat loads.

[0028] Optionally, an insulating sleeve is provided between the two straight plates and the telescopic body, and the insulating sleeve fills the space between the straight plates and the telescopic body.

[0029] Optionally, the inner side of the connecting flange is provided with a plurality of clamping studs, which extend toward the mating frame.

[0030] Optionally, a top and two side arched plates are provided between the end faces of the two docking frames that are connected in a combined manner. The grooves of the top and two side arched plates are inclined, and the grooves of the top and two side arched plates are blocked by heat insulation sleeves.

[0031] Optionally, the space between the connecting flange and the mating frame is filled with thermal insulation cotton, which simultaneously wraps the rivets.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. High efficiency in absorbing axial thermal displacement and flexible buffering performance: By evenly distributing several high-temperature dustproof bodies around the docking frame, the compensator has excellent axial displacement absorption and buffering capabilities during thermal expansion and contraction, ensuring the stable operation of the pipeline system.

[0034] 2. Excellent sealing and protection functions: The high-temperature dustproof body connects to and seals the interface of the docking frame, which can effectively prevent the leakage of high-temperature gas, dust and other media, and improve the safety of system operation and environmental cleanliness.

[0035] 3. Excellent high-temperature insulation performance: The inner insulation structure, combined with the welded bolt assembly and pressure plate fixing method, effectively blocks heat conduction to the external structural components of the compensator, ensuring the long-term safe operation and structural stability of the device.

[0036] 4. High-strength connection and easy assembly: By setting up straight plates, connecting flanges, connecting plates II and double-headed bolt assemblies of equal length, a high-strength and stable connection between various components is achieved. At the same time, the structure is easy to assemble and maintain, reducing the difficulty of on-site construction.

[0037] 5. Adaptable to high-frequency thermal expansion and contraction: The straight plate's extension and bending structure, combined with the expansion joint, provides excellent thermal stress absorption and elastic recovery capabilities, effectively extending the service life of the compensator under high-temperature vibration or dynamic load conditions.

[0038] 6. Composite thermal insulation and multi-layer protection structure design: By setting up multiple structures such as thermal insulation sleeves, anchor bolts, arched plates and thermal insulation cotton, thermal protection and structural protection of key connection parts are achieved, further improving the overall reliability and durability of the compensator. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of a high-temperature non-metallic compensator applied to an expansion joint according to an embodiment of this application.

[0040] Figure 2 yes Figure 1 Top view.

[0041] Figure 3 yes Figure 2 local Figure 1 .

[0042] Figure 4 yes Figure 2 According to the map Figure 2 .

[0043] Figure 5 yes Figure 2 A diagram showing a 90-degree leftward rotation.

[0044] Figure 6 yes Figure 5 Enlarged view of a portion of the image.

[0045] Figure 7 yes Figure 2 Enlarged view of a portion of the image.

[0046] Explanation of reference numerals in the attached drawings: 100, compensator body; 101, docking frame; 1010, straight plate; 1012, connecting plate two; 1, clamping flange; 2, expansion joint; 3, insulation sleeve; 4, bolt; 5, connecting flange; 6, grappling nail; 7, inner insulation layer; 8, welded bolt assembly; 9, insulation pressure plate; 10, equal-length double-ended bolt assembly; 11, high-temperature dustproof body; 12, top and side arched plates; 14, insulation cotton. Detailed Implementation

[0047] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0048] This application discloses a high-temperature non-metallic compensator applied to expansion joints. (Refer to...) Figure 1 and Figure 2 The compensator body 100 includes a docking frame 101 and several high-temperature dustproof bodies 11. Several high-temperature dustproof bodies 11 are evenly distributed around the two docking frames 101, connecting them in a combined manner. The high-temperature dustproof bodies 11 buffer and absorb axial displacement and reset the two docking frames 101. The high-temperature dustproof bodies 11 seal the connection position of the two docking frames 101. By evenly distributing several high-temperature dustproof bodies 11 around the two docking frames 101, the compensator body 100 effectively absorbs and buffers axial displacement in high-temperature environments. The high-temperature dustproof bodies 11 possess excellent flexibility and heat resistance, providing elastic recovery force during the thermal expansion and contraction of the pipeline, effectively reducing mechanical stress at the connection points, and extending the service life of the equipment. Simultaneously, the high-temperature dustproof bodies 11 structurally achieve a sealing function at the connection position between the two docking frames 101, improving overall airtightness and thermal isolation, preventing leakage of high-temperature gas or dust, and enhancing the safety and stability of system operation.

[0049] Reference Figure 3 , Figure 4 , Figure 5The high-temperature dustproof body 11 includes an inner heat insulation body 7, a welding bolt assembly 8, and a heat insulation pressure plate 9. The two ends of the inner heat insulation body 7 are respectively connected to the docking frame 101. The two ends of the inner heat insulation body 7 are respectively connected by the welding bolt assembly 8 and the heat insulation pressure plate 9. The welding bolt assembly 8 and the heat insulation pressure plate 9 connect the inner heat insulation body 7 and the two docking frames 101. Through the synergistic cooperation of the above structures, reliable connection and effective heat insulation are achieved in high-temperature environments. The inner heat insulation body 7 is made of high heat resistance and low thermal conductivity material, which can effectively block the heat conduction of high-temperature gases and protect the docking frame 101 and the surrounding structure from heat damage. Its two ends are firmly connected to the docking frame through the welding bolt assembly 8 and the heat insulation pressure plate 9, which not only ensures the stability of the structure, but also enhances the overall sealing performance. The welding bolt assembly 8 provides a stable mechanical connection, and the heat insulation pressure plate 9 plays a role in pressing and protecting, preventing the inner heat insulation body 7 from loosening or shifting due to thermal expansion or vibration.

[0050] Reference Figure 3 , Figure 4 , Figure 5 The high-temperature dustproof body 11 includes a straight plate 1010. One end of the straight plate 1010 is fixed to the outer wall of the docking frame 101, and the other end of the straight plate 1010 extends outward. The other ends of the two adjacent straight plates 1010 of the two docking frames 101 are bent vertically outward. The upper end of the bent position is covered by a telescopic body 2. The two ends of the telescopic body 2 are fixedly connected to the bent positions of the two straight plates 1010 by bolts 4. The bolts 4 are sleeved with the clamping flange 1, and the clamping flange 1 is close to the telescopic body 2. One end of the straight plate 10110 is fixed to the outer wall of the docking frame 101, and the other end extends outward and forms a coverable space between the two adjacent straight plates. The end is bent vertically to form an installation position, which effectively enhances the structural rigidity and connection strength. The telescopic body 2 covers the bent area and is firmly connected to the straight plates on both sides by bolts. The clamping flange is sleeved on the outside of the bolts to ensure that the telescopic body 2 can still be firmly attached to the connection part under high temperature. This structure not only improves the overall sealing and high-temperature resistance of the high-temperature dustproof body 11, but also effectively absorbs the axial or radial displacement generated by the compensator during operation by utilizing the elastic deformation of the telescopic body 2, preventing structural deformation or damage.

[0051] Reference Figure 6 , Figure 7A horizontally extending connecting flange 5 is provided on the outer side of the straight plate 1010. A connecting plate 2 1012 is provided on the side of the connecting flange 5 away from the docking frame 101. The connecting plate 2 1012 is perpendicular to the connecting flange 5 and extends outward. The top of two adjacent connecting plates 2 1012 are connected by an equal-length double-headed bolt assembly 10. Nuts are provided at both ends of the double-headed bolt assembly 10 to fix the double-headed bolt assembly 10 and the top of the two adjacent connecting plates 2 1012 into one piece. An insulation sleeve 3 is provided between the two straight plates 1010 and the expansion body 2. The space between the straight plate 1010 and the telescopic body 2 is filled; several grab studs 6 are provided on the inner side of the connecting flange 5, and the grab studs 6 extend toward the docking frame 101; a top and two side arched plates 12 are provided between the end faces of the two docking frames 101 connected in a combined manner, the grooves of the top and two side arched plates 12 are inclined, and the grooves of the top and two side arched plates 12 are blocked by the heat insulation sleeve 3; the space between the connecting flange 5 and the docking frame 101 is filled with heat insulation cotton 14, and the heat insulation cotton 14 simultaneously wraps the grab studs 6; the non-metallic filler is improved through the synergistic effect of multiple structures. The compensator exhibits excellent sealing, insulation, and structural stability under high-temperature conditions. The straight plate 1010 features a laterally extending connecting flange on its outer side, enhancing structural connection strength. It is securely connected to adjacent structures via connecting plate two. The double-headed bolt assembly 10 further strengthens the connection, effectively preventing loosening due to vibration or thermal expansion and contraction during operation. An insulating sleeve is installed between the straight plate 1010 and the expansion body 2, providing insulation and protection while ensuring a flexible connection, thus improving overall thermal stability. Several clamping studs 6 are installed inside the connecting flange, combined with insulation cotton filling, enhancing structural adhesion and improving insulation performance. The top and side arched plates 12 have angled slots, facilitating natural flow guidance in the sealing structure and effectively mitigating the impact of hot airflow at the joint. The insulating sleeve seals the slots, further improving sealing and insulation. The overall structure achieves efficient compensation for axial and radial displacement, while possessing comprehensive technical advantages such as high-temperature resistance, heat radiation protection, and fatigue resistance. It is suitable for non-metallic compensator systems operating under extreme conditions such as high-temperature flues and pipelines.

[0052] like Figure 1-7 As shown, the compensator body 100 consists of a pair of parallel mating frames 101, with a distance of 600mm between the two frames. They are welded from Q345R heat-resistant steel with a wall thickness of 12mm. High-temperature dustproof bodies 11 are evenly distributed circumferentially, with no fewer than 12 sets, and the central angle of each set is the same.

[0053] The inner insulation 7 adopts an alumina fiber-alumina silica fiber laminated composite structure with a total thickness of not less than 50mm. The single layer densities are 160kg / m³ (inner layer) and 80kg / m³ (outer layer), respectively. It is bonded with high-temperature phenolic resin and is attached to the inner surface of the docking frame 101 by vacuum adsorption process during installation. The contact thermal resistance is ≤0.05W / (m²·K).

[0054] The welding bolt assembly 8 consists of M16 stainless steel bolts (A2-70 grade) paired with graphite washers. The bolt preload is controlled at 80kN to ensure that the preload decay rate is <5% at the operating temperature (600℃).

[0055] The heat insulation plate 9 is made of ZG25Cr2Mo cast steel with a hard chrome plating (50μm thickness). The contact surface with the docking frame is machined into a sawtooth interlocking structure to increase the friction coefficient to 0.85.

[0056] The thermal expansion of the pipeline was simulated using finite element analysis software (ANSYS Mechanical). When a 50mm axial displacement occurred between the two connecting frames, the maximum strain value of the high-temperature dustproof body 11 was 12%, which was lower than the material yield strength (23%). The fatigue life of the expansion body 2 reached 100,000 cycles after standard testing, and the residual deformation was <0.5%.

[0057] like Figure 6-7 As shown, the top and side arched plates 12 are made of 316L stainless steel and are stamped with a thickness of 6mm. The groove slope is designed to be 5°. The gap between the plate and the mating frame 101 is filled with nanoporous silicate insulation sleeve 3 with a porosity of 85%.

[0058] The installation of the insulation sleeve 3 adopts the heat shrink film-assisted positioning method. After heating the insulation sleeve to 200℃, it is inserted into the groove of the arched plate. The self-tightening seal is achieved by utilizing the shrinkage characteristics of the material, and the pressure on the contact surface reaches 3MPa.

[0059] Dynamic leak testing was conducted at a vapor pressure of 0.6 MPa (temperature 550℃) using a helium mass spectrometer leak detector, and the leak rate was <1×10⁻⁻⁻⁶. 6 Pa·m³ / s, meeting the ISO 15848 AH standard.

[0060] like Figure 4 As shown, this embodiment adopts a split docking frame design, which splits the docking frame 101 into an upper frame and a lower frame. It is quickly assembled by 8 sets of high-temperature dustproof bodies 11. 24 Inconel 600 grabs (diameter Φ6mm, spacing 20mm) are arranged inside the connecting flange 5. The heads of the grabs are processed into dovetail groove structures and are used with high-temperature resistant epoxy glue (HysolEA 9396) to achieve mechanical-chemical dual fixation with the docking frame.

[0061] The thermal insulation cotton 14 is laid by filling the gaps around the anchors with aerogel felt (SiO2 based, 10mm thick), with a wrapping density ≥30kg / m³ and thermal conductivity ≤0.016W / (m·K).

[0062] The inner insulation layer 7 is made using a spiral winding process, with fiber tension controlled at 5N / cm to ensure interlayer density; the outer layer is covered with an aluminum foil reflective layer (0.1mm thick) with a reflectivity >95%.

[0063] Embedding 304 stainless steel wire mesh (0.5 mm diameter, 40% porosity) between alumina fiber layers increases compressive strength to 15 MPa.

[0064] The preload of the double-ended bolt 10 is controlled using the torque-rotation method. The initial preload torque is 200 N·m, followed by a 90° rotation (additional torque of 80 N·m) to ensure that the bolt elongation reaches 95% of the theoretical value.

[0065] The bolt head is equipped with a cotter pin hole, which, together with a spring washer (material 65Mn), achieves double anti-loosening.

[0066] Dynamic stress test: Under vibration conditions of 2Hz frequency and ±10mm amplitude (lasting for 72 hours), the bolts of connecting flange 5 did not loosen, and the residual displacement was <0.3mm.

[0067] Thermal cycling test: Operating conditions: -40℃→600℃ for 100 cycles, heating rate 15℃ / min, cooling rate 20℃ / min; Results: No cracking or detachment of the high-temperature dustproof body 11, and no deformation at the weld of the butt frame 101.

[0068] Long-term high-temperature aging test: Operating condition: 600℃ constant temperature for 1000 hours.

[0069] Data: Alumina fiber volume loss rate <2%, inner insulation layer 7 shrinkage rate <0.5%;

[0070] Test conditions: Leakage rate (standard requirement) measured value ≤ 1×10⁻ at 0.5 MPa and 550℃ steam. 5 Pa·m³ / s 6.3×10⁻ 7 0.3MPa, 300℃ dust ≤5×10⁻ 6 Pa·m³ / s 2.1×10⁻ 7 .

[0071] The implementation principle of a high-temperature non-metallic compensator applied to an expansion joint according to an embodiment of this application is as follows:

[0072] 1. The high-temperature dustproof body is distributed between the two docking frames as a connector. Its structure is embedded with a highly elastic and heat-resistant expansion body. When the pipeline expands due to heat or contracts due to cold, causing displacement, the expansion body can undergo elastic deformation to absorb and buffer the displacement, thereby effectively preventing damage or fatigue failure of the rigid connection part caused by displacement.

[0073] 2. The internal structure of the device, including the insulation, is made of low thermal conductivity high temperature materials, which can significantly reduce heat conduction efficiency. The multiple insulation structures work together to block the conduction of high temperature gas heat energy to the connecting frame or surrounding structure, thereby improving the overall thermal stability and protection capability. At the same time, the sealing structure ensures the airtightness of the connection and prevents high temperature flue gas leakage.

[0074] 3. High-temperature dustproof body (provides full coverage of the exposed parts of the structure. Through the arched plate and the inclined groove structure, the flow of high-temperature gas is naturally guided, which reduces the impact of hot air flow on the connection gap and enhances its service life. The arched groove is sealed by the heat insulation sleeve to effectively prevent dust particles from entering and enhance the protective effect.

[0075] 4. The double-headed bolt assembly and the connecting plate structure work together to provide reliable fastening performance for the entire structure; while the piercing nails penetrate the heat insulation cotton to improve the adhesion between the connecting flange and the mating frame, avoiding loosening of the connection due to thermal expansion and contraction or vibration under high temperature conditions. The multi-point distributed bolt assembly forms an "elastic-rigid combined structure", which allows the compensator to flexibly follow the displacement while maintaining strength.

[0076] 5. All components, such as the straight plate, clamping flange, connecting flange, and insulation components, are modular, which facilitates later installation, inspection, and replacement, reduces maintenance costs, and improves equipment reliability.

[0077] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high temperature non-metallic expansion joint compensator for application to an expansion joint, comprising a compensator body (100), characterised in that: The compensator body (100) comprises a docking frame (101) and a plurality of high-temperature dustproof bodies (11); A plurality of high-temperature dustproof bodies (11) are evenly distributed on the periphery of the two docking frames (101), the high-temperature dustproof bodies (11) combine and connect the two docking frames (101), and the two docking frames (101) are buffered and absorbed by the high-temperature dustproof bodies (11) to reset the axial displacement. The high-temperature dustproof body (11) seals the connection position of the two docking frames (101).

2. The high temperature non-metallic expansion joint compensator for use in expansion joints as claimed in claim 1, wherein: The high-temperature dustproof body (11) comprises an inner layer heat insulating body (7), a welded bolt assembly (8), and a heat insulating body pressing plate (9), both ends of the inner layer heat insulating body (7) are connected to the docking frame (101), both ends of the inner layer heat insulating body (7) are provided with the welded bolt assembly (8) and the heat insulating body pressing plate (9), and the welded bolt assembly (8) and the heat insulating body pressing plate (9) connect the inner layer heat insulating body (7) and the two docking frames (101).

3. The high temperature non-metallic expansion joint compensator for use in expansion joints as claimed in claim 1, wherein: The high-temperature dustproof body (11) comprises a straight plate (1010), one end of the straight plate (1010) is fixed to the outer wall of the docking frame (101), the other end of the straight plate (1010) extends outward, the other ends of two adjacent straight plates (1010) of the two docking frames (101) are vertically bent outward, a telescopic body (2) is installed on the bent position of the two straight plates (1010), and both ends of the telescopic body (2) are fixedly connected with the two straight plates (1010) at the bent position through bolts (4).

4. The high temperature non-metallic expansion joint compensator for use in expansion joints as claimed in claim 3, wherein: The bolt (4) is sleeved with a pressing flange (1), and the pressing flange (1) is tightly attached to the telescopic body (2).

5. The high temperature non-metallic expansion joint compensator for use in expansion joints as claimed in claim 3, wherein: The outer side of the straight plate (1010) is provided with a transversely extending connecting flange (5), the side of the connecting flange (5) away from the docking frame (101) is provided with a connecting plate two (1012), and the connecting plate two (1012) is perpendicular to the connecting flange (5) and extends outward.

6. The high temperature non-metallic expansion joint compensator for use in expansion joints as claimed in claim 5 wherein: The top of two adjacent connecting plate twos (1012) is integrally connected with an equal-length double-headed bolt assembly (10), and nuts are arranged at both ends of the double-headed bolt assembly (10) to integrally fix the double-headed bolt assembly (10) and the top of the two adjacent connecting plate twos (1012).

7. The high temperature non-metallic expansion joint compensator for use in expansion joints as claimed in claim 5 wherein: An insulating sleeve (3) is arranged between the two straight plates (1010) and the telescopic body (2), and the insulating sleeve (3) fills the space between the two straight plates (1010) and the telescopic body (2).

8. The high temperature non-metallic expansion joint compensator for use in expansion joints as claimed in claim 5 wherein: The inner side of the connecting flange (5) is provided with a plurality of nails (6), and the nails (6) extend towards the docking frame (101).

9. The high temperature non-metallic expansion joint compensator for use in expansion joints as claimed in claim 5 wherein: A top and two side arched plates (12) are arranged between the end faces of the two docking frames (101) combined and connected, the groove of the top and two side arched plates (12) has an inclination, and the groove of the top and two side arched plates (12) is blocked by the insulating sleeve (3).

10. The high temperature non-metallic expansion joint compensator for use in expansion joints as claimed in claim 5, wherein: The space between the connecting flange (5) and the docking frame (101) is filled with heat insulation cotton (14), and the heat insulation cotton (14) simultaneously wraps the nails (6).

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