Heavy-load high-fatigue-toughness spherical steel support

Abstract

The utility model discloses a heavy-load high-fatigue-toughness spherical steel support. The heavy-load high-fatigue-toughness spherical steel support comprises a support body and a dustproof device, the support body is used for being installed between a bridge floor and a padstone. The dustproof device is installed on the side face of the support body and used for preventing dust and sundries from entering the support body. Wherein the dustproof device comprises a U-shaped buckle, a clamping plate and dustproof cloth, and the U-shaped buckle is installed on the side face of the support body; the clamping plate is arranged in the U-shaped buckle; the dustproof cloth is installed on the clamping plate and used for shielding the area of the support body after penetrating through the U-shaped buckles. The utility model aims to solve the problems that the dust cover of the support in the prior art is difficult to disassemble and assemble and is not beneficial to daily maintenance, and meanwhile, the support body made of low-alloy cast steel solves the problem that the traditional support is easy to fatigue and crack, and the support body is made of a plane wear-resisting plate and a spherical wear-resisting plate which are made of specially-made modified polytetrafluoroethylene materials, so that the service life of the support is prolonged. And the support body can be longer in service life and more fatigue-resistant.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a heavy-duty, high-fatigue-toughness spherical steel bearing. Background Technology

[0002] Bearings are crucial components connecting structures and foundations, playing a vital role in transferring loads, accommodating displacement, and buffering deformation to ensure structural stability and safety. Their working principle primarily relies on rational mechanical design, enabling them to withstand vertical loads while accommodating horizontal displacement and rotational deformation, thereby reducing additional stress within the structure. Different types of bearings, through specific structural forms and mechanical properties, control deformation in different directions. For example, fixed bearings mainly bear vertical and horizontal forces, while movable bearings allow for a certain range of displacement or rotation to adapt to temperature changes, seismic forces, and other external forces. With the development of engineering technology, bearings have been continuously optimized in terms of load-bearing capacity, durability, and adaptability. Performance improvements through precise calculations and advanced manufacturing processes have enabled them to play a vital role in bridges, buildings, and special structures, providing reliable load-bearing support for engineering projects. Spherical steel bearings are high-performance structural components capable of multi-directional rotation and are widely used in bridges and large buildings to adapt to complex stress and deformation requirements. Its working principle relies on spherical force transmission, effectively transferring vertical loads through spherical contact while allowing the structure to rotate at certain angles in both horizontal and vertical directions, thereby reducing constraint forces and internal stress concentration. With the increasing scale of bridge and building projects, traditional bearings have limitations in terms of load-bearing capacity, durability, and adaptability, prompting the continuous development of spherical steel bearing technology. Modern spherical steel bearings employ advanced calculation and analysis methods to optimize stress design, enabling them to meet the needs of large spans, large displacements, and complex working conditions. Combined with high-precision manufacturing processes, they improve load-bearing capacity and long-term stability. Today, this type of bearing has become an important component of high-standard projects, providing key technical support for enhancing structural safety and durability.

[0003] First, existing spherical steel bearing models have limited load-bearing capacity and insufficient strength, making it difficult to meet the high-strength requirements of heavy-load bridges during long-term operation. Existing bearing steel structures generally use ZG270-500 cast steel, which has relatively low mechanical properties. Especially during long-term bridge operation, the strong dynamic loads generated by repeated train passages cause continuous impacts on the bearings, making them prone to fatigue damage under high-frequency vibration and alternating loads. This leads to bearing performance degradation and may ultimately cause structural failure. Furthermore, due to the material's relatively ordinary impact resistance, it is unable to withstand the high impact forces in the heavy-load bridge environment. Its poor toughness makes it prone to cracking or even fracture under significant stress impacts. In addition, existing bearing designs fail to adequately consider stress concentration issues and do not optimize stress dispersion in areas of stress concentration. Fatigue failure typically begins in localized areas of high stress or strain, with damage gradually accumulating and eventually causing bearing failure at these weak points. Secondly, existing support polymer material sliding plates typically use polytetrafluoroethylene (PTFE), modified polytetrafluoroethylene (M-PTFE), or modified ultra-high molecular weight polyethylene (M-UHMWPE), which have the following problems:

[0004] 1) It is highly dependent on silicone grease. The silicone grease will be squeezed out during the movement of the support. After 3-5 years of operation, the silicone grease will be exhausted and difficult to replenish. The coefficient of friction will continue to increase, accelerating wear.

[0005] 2) The sliding plate between the support and the stainless steel plate becomes thinner, often accompanied by the extrusion of PTFE sliding plate (white film-like substance), and sometimes the sliding plate falls off and is squeezed out of the support.

[0006] 3) The material of the sliding plate is relatively brittle, has poor creep resistance, and is not resistant to high temperature. The sliding plate is easily damaged under rapid movement, leading to the failure of the support. The bridge support has a large cumulative displacement under temperature and load. The wear of the sliding plate and the steel plate is very large. After the sliding plate is worn out, the steel body rubs against each other, causing the main body of the support to be torn and damaged.

[0007] In addition, the existing dust cover design of the bearings also has certain defects. Most of them are fixed with bolts. Although they can provide a certain degree of protection, the disassembly and assembly process is relatively complicated, which is not conducive to daily inspection and maintenance, increases maintenance costs and difficulty, and makes the maintainability of the bearings poor in long-term use. Utility Model Content

[0008] This utility model provides a heavy-duty, high-fatigue-toughness spherical steel support, aiming to solve the problem that the dust cover of the support is difficult to disassemble and assemble, which is not conducive to daily maintenance.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0010] A heavy-duty, high-fatigue-toughness spherical steel bearing includes a bearing body and a dustproof device; the bearing body is used for installation between the bridge deck and the bearing pad, and the bearing body is made of low-alloy cast steel; the dustproof device is installed on the side of the bearing body and is used to prevent dust and debris from entering the bearing body.

[0011] The dustproof device includes a U-shaped buckle, a clamping plate, and a dustproof cloth. The U-shaped buckle is installed on the side of the support body; the clamping plate is located inside the U-shaped buckle; and the dustproof cloth is installed on the clamping plate. The dustproof cloth is used to cover the area of ​​the support body after passing through the U-shaped buckle.

[0012] Furthermore, the bearing body includes an upper bearing plate, a lower bearing plate, and a spherical crown liner. The upper bearing plate is used to connect with the bridge deck, the lower bearing plate is used to connect with the pad stone, and the spherical crown liner is movably installed between the upper bearing plate and the lower bearing plate. The U-shaped buckle is installed on the upper bearing plate by connecting bolts, and the dustproof cloth is used to cover the areas of the upper bearing plate, the lower bearing plate, and the spherical crown liner.

[0013] Furthermore, the upper support plate is connected to the bridge deck through a steel plate pre-embedded at the bottom of the beam.

[0014] Furthermore, a flat wear-resistant plate is provided on the spherical crown liner, and a flat stainless steel plate is provided at the bottom of the upper support plate. The flat wear-resistant plate is used to contact the flat stainless steel plate.

[0015] Furthermore, a spherical stainless steel plate is provided at the bottom of the spherical crown liner, and a spherical wear-resistant plate is provided on the spherical surface of the lower support plate. The spherical wear-resistant plate is used to contact the spherical stainless steel plate, and the flat wear-resistant plate and the spherical wear-resistant plate are made of polytetrafluoroethylene material.

[0016] Furthermore, a stainless steel strip and a wear-resistant strip are provided between the upper support plate and the lower support plate, with the stainless steel strip provided on the upper support plate and the wear-resistant strip provided on the lower support plate.

[0017] Furthermore, the spherical crown liner is provided with a sealing groove, and a sealing ring is provided inside the sealing groove. The sealing ring is used to contact the flat wear-resistant plate.

[0018] Furthermore, the lower support plate is connected to the pad stone via anchoring components.

[0019] Furthermore, the anchoring assembly includes an anchoring sleeve and an anchoring bolt. The anchoring sleeve is used to be installed inside the pad stone, and the anchoring bolt is used to pass through the lower support plate and be threadedly connected to the anchoring sleeve.

[0020] Furthermore, the lower support plate is provided with a through hole, and the anchor bolt passes through the through hole and engages with the threaded anchor sleeve.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This utility model mainly includes a support body and a dustproof device. In actual use, the main function of the clamping plate is to connect the dustproof cloth, making it easy to snap into the U-shaped buckle. The main function of the U-shaped buckle is to fix the clamping plate and the dustproof cloth, while also facilitating the removal of the dustproof cloth. The main function of the dustproof cloth is to protect the inside of the support from the intrusion of external substances such as dust, dirt, and moisture, maintaining the normal operation of the support, extending its service life, and preventing wear or corrosion of friction parts. During use, the dustproof cloth can effectively prevent sand, moisture, and other impurities from entering the inside of the support body, protecting the support body from wear, corrosion, and pollution, especially preventing dust from entering the friction surface of the support body, affecting the service life of the support body, and thus affecting the maintenance frequency and service life of the support body. The polyurethane material of the dustproof cloth has excellent transparency, which can ensure the smooth progress of the periodic inspection of railway bridges. When the dustproof cloth needs to be replaced, there is no need to remove the bolts. The staff only needs to remove the clamping plate connected to the dustproof cloth from the U-shaped buckle and replace it with a new dustproof cloth, which can quickly carry out the replacement work, which is efficient and practical. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure for fixing and moving the support body in this utility model.

[0025] Figure 2 This is a schematic diagram of the structure of the support body in this utility model, showing its longitudinal movement.

[0026] Figure 3 This is a schematic diagram of the structure of the support body in this utility model, showing its lateral movement.

[0027] Figure 4 This is a schematic diagram of the structure of the support body in this utility model, which allows for multi-directional movement.

[0028] Figure 5 This is a structural schematic diagram of the chamfered corner of the upper support plate in this utility model.

[0029] Figure 6 This is a cross-sectional view of the dustproof device of this utility model.

[0030] In the diagram, 1-upper support plate, 2-flat stainless steel plate, 3-sealing ring, 4-flat wear-resistant plate, 5-spherical crown liner, 6-spherical stainless steel plate, 7-spherical wear-resistant plate, 8-lower support plate, 9-stainless steel strip, 10-wear-resistant strip, 11-anchor sleeve, 12-anchor bolt, 13-beam bottom embedded steel plate, 14-clamping plate, 15-U-shaped buckle, 16-dustproof cloth, 17-connecting bolt, 18-washer, 19-fixing bolt. Detailed Implementation

[0031] The present invention will be further described below with reference to the embodiments. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of the present invention.

[0032] Please see Figure 1-3 As shown, this embodiment discloses a heavy-duty high fatigue toughness spherical steel bearing, including a bearing body and a dustproof device; the bearing body is used to be installed between the bridge deck and the pad stone, and the bearing body is made of low alloy cast steel; the dustproof device is installed on the side of the bearing body and is used to prevent dust and debris from entering the bearing body.

[0033] The dustproof device includes a U-shaped buckle 15, a clamping plate 14, and a dustproof cloth 16. The U-shaped buckle 15 is installed on the side of the support body; the clamping plate 14 is located inside the U-shaped buckle 15; and the dustproof cloth 16 is installed on the clamping plate 14. The dustproof cloth 16 is used to cover the area of ​​the support body after passing through the U-shaped buckle 15.

[0034] This utility model mainly includes a support body and a dustproof device. In actual use, the main function of the clamping plate 14 is to connect the dustproof cloth 16, making it easy to snap into the U-shaped buckle 15. The main function of the U-shaped buckle 15 is to fix the clamping plate 14 and the dustproof cloth 16, and at the same time facilitate the disassembly of the dustproof cloth 16. The main function of the dustproof cloth 16 is to protect the inside of the support from the intrusion of external substances such as dust, dirt, and moisture, maintain the normal operation of the support, extend its service life, and prevent wear or corrosion of friction parts. When in use, the dustproof cloth 16 can effectively prevent sand, moisture and other impurities from entering the inside of the support body, protecting the support body from wear, corrosion and pollution, especially preventing dust from entering the friction surface of the support body, affecting the service life of the support body, and thus affecting the maintenance frequency and service life of the support body. The main material of the dustproof cloth 16, polyurethane, has excellent transparency, which can ensure the smooth progress of the regular inspection of railway bridges. When the dustproof cloth 16 needs to be replaced, there is no need to remove the bolts. The staff only needs to remove the clip 14 connected to the dustproof cloth 16 from the U-shaped clip 15 and replace it with a new dustproof cloth 16. The replacement work can be carried out quickly, which is efficient and practical.

[0035] It should be noted that in this embodiment, the problem of fatigue cracking of traditional supports is solved by using a support body made of low alloy cast steel. Low alloy cast steel is cast steel with a total alloy element content of less than 5%. Low alloy cast steel is existing technology and will not be described in detail here.

[0036] In some embodiments, the bearing body includes an upper bearing plate 1, a lower bearing plate 8, and a spherical crown liner 5. The upper bearing plate 1 is used to connect with the bridge deck, the lower bearing plate 8 is used to connect with the pad stone, and the spherical crown liner 5 is movably installed between the upper bearing plate 1 and the lower bearing plate 8. The U-shaped buckle 15 is installed on the upper bearing plate 1 by connecting bolts 17, and the dustproof cloth 16 is used to cover the area of ​​the upper bearing plate 1, the lower bearing plate 8, and the spherical crown liner 5.

[0037] In practical use, the main function of the upper support plate 1 is to evenly transfer the load of the superstructure to the support and provide reliable support, while allowing the structure to rotate or displace freely under the influence of temperature changes, loads, or other factors, so as to reduce the constraint stress of the structure; the main function of the spherical cap liner plate 5 is to cooperate with the lower support plate 8 to form a spherical hinge structure, allowing the support to rotate freely to adapt to the angle changes of the bridge or structure, while evenly transferring the load and reducing local stress concentration; the main function of the lower support plate 8 is to evenly transfer the support reaction force to the substructure (such as piers or abutments), ensuring the stable and reliable operation of the support, and providing a reliable connection with the foundation;

[0038] The upper support plate 1 has a limiting block at its bottom. The limiting block has four structures corresponding to the four functions of the support body: fixed movement, longitudinal movement, lateral movement, and multi-directional movement. The limiting block is equipped with a chamfer. The chamfer design of the limiting block effectively reduces the fatigue stress amplitude, avoids local fatigue damage to the upper support plate 1 due to stress concentration, and effectively improves the fatigue resistance of the support.

[0039] When the support is a fixed support, the limiting block and the spherical crown liner 5 do not slip relative to each other. The upper support plate 1 and the lower support plate 8 transmit vertical force through the spherical surface. Only rotation is allowed and horizontal displacement is not allowed. It is usually used at the fixed end of the bridge to resist overall displacement and bear horizontal force.

[0040] When the support is a longitudinal movable support, the limiting block is provided with a guide in the longitudinal direction, so that the spherical crown liner 5 and the limiting block can slide relative to each other in the longitudinal direction, while the lateral direction is restricted. This is suitable for situations where the bridge can freely expand and contract in the longitudinal direction but is stable in the lateral direction.

[0041] The structure of the transverse movable bearing is similar to that of the longitudinal movable bearing, but the guiding direction is opposite. It allows lateral sliding while restricting longitudinal displacement and is often used in situations where the stress requirements require the bridge to deform freely in the lateral direction.

[0042] The multi-directional movable support eliminates all limiting devices, allowing the spherical cap liner 5 to slide freely in the horizontal direction, making it suitable for bridges that require multi-directional free deformation.

[0043] When in use, as a vehicle passes over the bridge deck, the load is transferred to the upper support plate 1, causing it to act downwards on the spherical cap liner 5, and then transferred to the lower support plate 8 through the spherical surface. At the same time, due to temperature changes or load effects, the movable support undergoes corresponding displacement in its permissible direction, while the fixed support remains stationary and only rotates to adapt to the deformation of the bridge.

[0044] In some embodiments, the upper support plate 1 is connected to the bridge deck via a steel plate 13 pre-embedded at the bottom of the beam.

[0045] In practical use, the main function of the flat stainless steel plate 2 is to cooperate with the flat wear-resistant plate 4 to form a flat friction pair, creating a low-friction sliding surface, allowing the support to slide freely, thereby adapting to the deformation and displacement of the structure, reducing constraint force, and improving the durability and stability of the support.

[0046] In some embodiments, a flat wear-resistant plate 4 is provided on the spherical crown liner 5, and a flat stainless steel plate 2 is provided at the bottom of the upper support plate 1. The flat wear-resistant plate 4 is used to contact the flat stainless steel plate 2.

[0047] In practical use, the main function of the flat wear-resistant plate 4 is to cooperate with the flat stainless steel plate 2 to form a flat friction pair, improve the wear resistance of the support, reduce friction loss, ensure smooth and stable sliding process, and thus enhance the durability and load-bearing capacity of the support.

[0048] In some embodiments, a spherical stainless steel plate 6 is provided at the bottom of the spherical crown liner 5, and a spherical wear-resistant plate 7 is provided on the spherical surface of the lower support plate 8. The spherical wear-resistant plate 7 is used to contact the spherical stainless steel plate 6, and the flat wear-resistant plate 4 and the spherical wear-resistant plate 7 are made of polytetrafluoroethylene material.

[0049] In practical use, the main function of the spherical wear-resistant plate 7 is to cooperate with the spherical stainless steel plate 6 to form a spherical friction pair, ensuring that the support rotates flexibly and smoothly, and improving the wear resistance of the spherical contact parts; the main function of the spherical stainless steel plate 6 is to cooperate with the spherical wear-resistant plate 7 to form a spherical friction pair, forming a low-friction sliding surface, ensuring that the support can rotate smoothly when the structure changes angle.

[0050] In some embodiments, a stainless steel strip 9 and a wear-resistant strip 10 are provided between the upper support plate 1 and the lower support plate 8. The stainless steel strip 9 is provided on the upper support plate 1, and the wear-resistant strip 10 is provided on the lower support plate 8.

[0051] In actual use, the main function of stainless steel strip 9 is to form a guide friction pair with wear-resistant strip 10, reduce the friction force when the support moves longitudinally or laterally, and ensure smooth movement; the main function of wear-resistant strip 10 is to form a guide friction pair with stainless steel strip 9, and ensure the durability, reliability and low friction of the support's longitudinal or lateral movement.

[0052] In some embodiments, the spherical crown liner 5 is provided with a sealing groove, and a sealing ring 3 is provided inside the sealing groove. The sealing ring 3 is used to contact the flat wear-resistant plate 4.

[0053] During the operation of the support, the combined effect of the sealing ring 3 and the dustproof cloth 16 enhances the overall dustproof effect, further preventing sand, moisture and other impurities from entering the interior of the support, protecting the support from wear, corrosion and pollution, especially preventing dust from entering the friction surface of the support slide plate, affecting the service life of the slide plate, and thus affecting the maintenance frequency and service life of the support.

[0054] In some embodiments, the lower support plate 8 is connected to the pad stone via an anchoring assembly.

[0055] In some embodiments, the anchoring assembly includes an anchoring sleeve 11 and an anchoring bolt 12, wherein the anchoring sleeve 11 is installed inside the pad stone, and the anchoring bolt 12 is threaded to the anchoring sleeve 11 after passing through the lower support plate 8.

[0056] In use, the upper structure first transmits the load through the upper support plate 1. The upper support plate 1 uses ZG20Mn instead of ZG270-500. The high impact absorption capacity of ZG20Mn can effectively absorb the impact energy under impact load, reduce structural impact damage, and improve the toughness and fatigue performance of the support under heavy traffic. At the same time, the four designs of the limiting blocks of the upper support plate 1 correspond to the four functions of the support: fixed movement, longitudinal movement, lateral movement, or multi-directional movement. The chamfer design of the limiting blocks effectively reduces the fatigue stress amplitude, avoids local fatigue damage to the upper support plate 1 due to stress concentration, and effectively improves the fatigue resistance of the support. The various sliding and pressure-bearing components in the support, such as the flat stainless steel plate 2 and the flat wear-resistant plate 4, start to work when the support slides in a plane. The spherical crown liner 5, the spherical stainless steel plate 6, and the spherical wear-resistant plate 7 start to work when the support changes angle or rotates. The stainless steel strip 9 and the wear-resistant strip 10 have excellent guiding function, helping the support to adapt more smoothly to longitudinal or lateral displacement changes under load. The flat wear-resistant plate 4, the spherical wear-resistant plate 7, and the wear-resistant strip 10 play a role in increasing the durability of the bearing during its use, ensuring that the bearing maintains good performance over long-term use. The flat wear-resistant plate 4 and the spherical wear-resistant plate 7 use ultra-high performance polytetrafluoroethylene (UHPF) instead of traditional polymer sliding plate materials. When silicone grease is applied, they exhibit excellent wear resistance and a low coefficient of friction. Even without silicone grease lubrication, they still maintain good wear resistance (3 times better than ordinary bearing sliding plate wear resistance), significantly extending the service life of the bearing. The lower bearing plate 8 ensures the load is transferred to the substructure, and the lower bearing plate 8 also uses ZG20Mn instead of ZG270-500. The anchoring sleeve 11 and anchoring bolts 12 ensure the stable fixing of the bearing, and the pre-embedded steel plate 13 at the bottom of the beam serves as the foundation for bearing fixation.

[0057] In some embodiments, the lower support plate 8 is provided with a through hole, and the anchor bolt 12 passes through the through hole and is threadedly engaged with the anchor sleeve 11.

[0058] In actual use, the purpose of setting through holes is to facilitate the threaded engagement between the anchor bolt 12 and the anchor sleeve 11 after the anchor bolt 12 passes through the lower support plate 8.

[0059] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0060] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heavy-duty, high-fatigue-toughness spherical steel support, characterized in that, include: The bearing body is used for installation between the bridge deck and the pad stone, and the bearing body is made of low alloy cast steel; A dustproof device is installed on the side of the support body and is used to prevent dust and debris from entering the support body. The dustproof device includes: U-shaped buckle (15), said U-shaped buckle (15) is installed on the side of the support body; A card plate (14) is disposed inside a U-shaped buckle (15); Dustproof cloth (16) is installed on the card plate (14) and is used to cover the area of ​​the support body after passing through the U-shaped buckle (15).

2. The heavy-duty, high-fatigue-toughness spherical steel support according to claim 1, characterized in that: The bearing body includes an upper bearing plate (1), a lower bearing plate (8), and a spherical crown liner (5). The upper bearing plate (1) is used to connect with the bridge deck, the lower bearing plate (8) is used to connect with the pad stone, and the spherical crown liner (5) is movably installed between the upper bearing plate (1) and the lower bearing plate (8). The U-shaped buckle (15) is installed on the upper bearing plate (1) by connecting bolts (17). The dustproof cloth (16) is used to cover the area of ​​the upper bearing plate (1), the lower bearing plate (8), and the spherical crown liner (5).

3. A heavy-duty, high-fatigue-toughness spherical steel support according to claim 2, characterized in that: The upper support plate (1) is connected to the bridge deck through a steel plate (13) pre-embedded at the bottom of the beam.

4. A heavy-duty, high-fatigue-toughness spherical steel support according to claim 3, characterized in that: The spherical crown liner (5) is provided with a flat wear-resistant plate (4), and the bottom of the upper support plate (1) is provided with a flat stainless steel plate (2). The flat wear-resistant plate (4) is used to contact the flat stainless steel plate (2).

5. A heavy-duty, high-fatigue-toughness spherical steel support according to claim 4, characterized in that: The bottom of the spherical crown liner (5) is provided with a spherical stainless steel plate (6), and the spherical surface of the lower support plate (8) is provided with a spherical wear-resistant plate (7). The spherical wear-resistant plate (7) is used to contact the spherical stainless steel plate (6). The flat wear-resistant plate (4) and the spherical wear-resistant plate (7) are made of polytetrafluoroethylene material.

6. A heavy-duty, high-fatigue-toughness spherical steel support according to claim 2, characterized in that: A stainless steel strip (9) and a wear-resistant strip (10) are provided between the upper support plate (1) and the lower support plate (8). The stainless steel strip (9) is provided on the upper support plate (1), and the wear-resistant strip (10) is provided on the lower support plate (8).

7. A heavy-duty, high-fatigue-toughness spherical steel support according to claim 4, characterized in that: The spherical crown liner (5) is provided with a sealing groove, and a sealing ring (3) is provided inside the sealing groove. The sealing ring (3) is used to contact the flat wear-resistant plate (4).

8. A heavy-duty, high-fatigue-toughness spherical steel support according to claim 2, characterized in that: The lower support plate (8) is connected to the pad stone through the anchoring assembly.

9. A heavy-duty, high-fatigue-toughness spherical steel support according to claim 8, characterized in that: The anchoring assembly includes an anchoring sleeve (11) and an anchoring bolt (12). The anchoring sleeve (11) is used to be installed inside the pad stone, and the anchoring bolt (12) is used to be threaded to the anchoring sleeve (11) after passing through the lower support plate (8).

10. A heavy-duty, high-fatigue-toughness spherical steel support according to claim 9, characterized in that: The lower support plate (8) is provided with a through hole, and the anchor bolt (12) passes through the through hole and is threaded into the anchor sleeve (11).

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