A bridge bearing suitable for ultra-long sliding distance

Abstract

A bridge bearing suitable for ultra-long sliding distances includes a lower seat plate assembly located below, a middle seat plate placed on the lower seat plate assembly, and an upper seat plate assembly located above the middle seat plate. A concave cavity is provided on the top or bottom surface of the middle seat plate inlaid with a non-metallic slide plate, an ejection mechanism is provided in the concave cavity, and a filling mechanism for ejecting materials from the ejection mechanism is provided on the side of the middle seat plate. The ejection mechanism includes a friction carrier plate and an adjustment pad stacked in sequence in the concave cavity. The filling mechanism consists of a first filling flow channel and a second filling flow channel. The discharge port of the first filling flow channel is connected to the gap between the friction carrier plate and the adjustment pad, and the discharge port of the second filling flow channel is connected to the gap between the bottom of the concave cavity and the adjustment pad. The bridge bearing can ensure the continuous effectiveness of the friction pair within the design life cycle, can meet the requirements of ultra-long sliding distances for large or extra-large bridge bearings, and achieve matching of the service life of the bridge bearing with the design service life of the bridge.

Description

Technical Field

[0001] The invention relates to the technical field of bridge bearings, and in particular to a bridge bearing suitable for an ultra-long sliding distance. Background Art

[0002] With the rapid development of domestic transportation, the number of large or extra-large bridges is increasing, and the span of bridges has also increased from tens of meters to hundreds of meters to thousands of meters. The increase in the span of the bridge has led to an exponential increase in the temperature rise displacement of the bridge and the deformation displacement of the beam body caused by the passage of vehicles. The sliding displacement of the bridge bearing has increased accordingly, and the cumulative sliding distance of the bearing friction pair within the design life cycle of the bridge has reached 1000km or even more than 3000km. However, the sliding distance of conventional railway or highway bridge bearings within the design life cycle is only more than 100 kilometers, which is far from meeting the requirements of the ultra-long sliding distance within the life cycle of large or extra-large bridges. Therefore, it is necessary to develop a new type of bridge bearing that can meet the requirements of the ultra-long sliding distance of large or extra-large bridges, so as to achieve the matching of the design life of the bridge bearing and the bridge. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a bridge bearing suitable for ultra-long sliding distances, which can ensure the continuous effectiveness of the friction pair within the design life cycle, can meet the requirements of ultra-long sliding distances of large or extra-large bridge bearings, and achieve matching of the service life of the bridge bearing with the design service life of the bridge.

[0004] In order to achieve the above technical purpose, the technical scheme adopted is: a bridge bearing suitable for ultra-long sliding distance, comprising a lower seat plate assembly located below, a middle seat plate placed on the lower seat plate assembly and an upper seat plate assembly located above the middle seat plate, a matching friction pair is provided between the lower seat plate assembly and the middle seat plate, and a matching friction pair is provided between the middle seat plate and the upper seat plate assembly, the friction pair is composed of a metal slide plate and a non-metal slide plate, a concave cavity is provided on the top surface or bottom surface of the middle seat plate inlaid with the non-metal slide plate, an ejection mechanism is provided in the concave cavity, and a filling mechanism for ejecting material from the ejection mechanism is provided on the side of the middle seat plate, the ejection mechanism comprises a friction carrier plate and an adjusting pad stacked in sequence in the concave cavity, a non-metallic slide plate is installed above or below the friction carrier plate, the filling mechanism is composed of a first filling flow channel and a second filling flow channel, one end of the first filling flow channel and the second filling flow channel is a discharge port, and the other end is a material injection port for high-pressure filling, the discharge port of the first filling flow channel is connected to the gap between the friction carrier plate and the adjusting pad, The discharge port of the second filling flow channel is communicated with the bottom of the cavity and the gap between the adjusting pad.

[0005] The friction pair is a rotating friction pair or a sliding friction pair.

[0006] Internal threads for installing plugs are provided in the injection ports of the first filling channel and the second filling channel.

[0007] A sealing device is arranged between the adjusting pad and the side wall of the concave cavity.

[0008] An injection channel is opened on the upper surface and / or lower surface of the adjustment pad, the inlet of the injection channel on one surface of the adjustment pad is arranged correspondingly to the outlet of the first filling channel, and the inlet of the injection channel on the other surface of the adjustment pad is arranged correspondingly to the outlet of the second filling channel.

[0009] The adjusting pad is composed of an integrally arranged pad and a retaining ring, the retaining ring is arranged on the upper surface of the pad, and a friction carrier is placed in a space enclosed by the retaining ring and the pad.

[0010] A sealing device is provided between the retaining ring and the friction carrier plate.

[0011] The sealing device is a sealing assembly consisting of an O-ring or an O-ring plus a retaining ring.

[0012] The filling material is a polymer material which is liquid in the initial state and can be quickly solidified at room temperature.

[0013] The beneficial effects of the present invention are as follows: when the support is working normally, the non-metallic slide plate of the friction surface will wear out. When the exposed height of the non-metallic slide plate is lower than the minimum exposed height, the exposed height of the non-metallic slide plate needs to be adjusted. When adjusting the exposed height of the non-metallic slide plate, the high-pressure injection device is first connected to the first filling flow channel of the seat plate cavity of the support through a pipeline, and then the high-pressure device is used to inject filler into the cavity between the adjustment pad and the friction carrier plate. The high-pressure filler pushes the friction carrier plate to drive the non-metallic slide plate to move, thereby realizing the adjustment of the exposed height of the non-metallic slide plate; as the use time of the support is further extended, when the exposed height of the non-metallic slide plate is lower than the minimum exposed height again, the exposed height of the non-metallic slide plate of the support needs to be adjusted for the second time. When the exposed height of the non-metallic slide plate is adjusted for the second time, the high-pressure injection device is connected to the second filling flow channel of the seat plate cavity of the support through a pipeline, and the high-pressure injection device is used to inject high-pressure filler into the bottom of the cavity. The high-pressure filler pushes the adjustment pad, the first filler and the friction carrier plate to drive the external height of the friction pair to increase. By gradually changing the exposed height of the non-metallic slide plate, the non-metallic slide plate is always in an effective state, meeting the use requirements of large or extra-large bridges with ultra-long sliding distances, and achieving matching of the service life of the bridge bearing with the design service life of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the cross-bridge structure of the support in Example 1 of the present invention;

[0015] Figure 2 This is a schematic diagram of the longitudinal bridge structure of the support in Example 1 of the present invention;

[0016] Figure 3 This is a schematic diagram of the longitudinal bridge structure of the support of Example 2 of the present invention;

[0017] Figure 4 This is a schematic diagram of the cross-bridge structure of the support in Embodiment 2 of the present invention;

[0018] Figure 5 This is a schematic diagram of the cross-bridge structure of the support of Example 3 of the present invention;

[0019] Figure 6 It is an enlarged structural schematic diagram of the support II of the present invention;

[0020] Figure 7 It is an enlarged structural schematic diagram of the support I of the present invention;

[0021] Figure 8 It is a schematic cross-sectional view of the support ejection structure adjusting pad of the present invention;

[0022] Fig. 9 It is a schematic diagram of the top view of the structure of the support ejection structure adjusting pad of the present invention;

[0023] In the figure: 1, upper seat plate assembly, 2, first friction pair, 21, first non-metallic slide plate, 22, first metal slide plate, 3, middle seat plate, 31, adjustment pad plate, 32, friction carrier plate, 311, second O-ring, 312, retaining ring, 313, pad plate, 314, injection channel, 321, first O-ring, 4, second friction pair, 41, second non-metallic slide plate, 42, second metal slide plate, 5, lower seat plate assembly, 6, first filling flow channel, 7, second filling flow channel, 8, plug. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0025] A bridge bearing suitable for an ultra-long sliding distance, comprising a lower seat plate assembly 5 located below, a middle seat plate 3 placed on the lower seat plate assembly 5, and an upper seat plate assembly 1 located above the middle seat plate 3, a matching friction pair is provided between the lower seat plate assembly 5 and the middle seat plate 3, a matching friction pair is provided between the middle seat plate 3 and the upper seat plate assembly 1, the friction pair is composed of a metal slide plate and a non-metal slide plate, a concave cavity is provided on the top surface or bottom surface of the middle seat plate 3 with the non-metal slide plate, an ejection mechanism is provided in the concave cavity, and a side surface of the middle seat plate 3 is provided with a material ejection mechanism for ejecting material filling. The filling mechanism, the ejection mechanism includes an adjustment pad 31 and a friction carrier 32 stacked in sequence in the concave cavity, a non-metallic slide plate is installed above or below the friction carrier 32, the filling mechanism is composed of a first filling channel 6 and a second filling channel 7, one end of the first filling channel 6 and the second filling channel 7 is a discharge port, and the other end is an injection port for high-pressure filling, the discharge port of the first filling channel 6 is connected to the gap between the friction carrier 32 and the adjustment pad 31, and the discharge port of the second filling channel 7 is connected to the gap between the bottom of the concave cavity and the adjustment pad 31. When the exposed height of the non-metallic slide plate is small, the filling material is injected into the concave cavity under high pressure through the filling channel, and the high-pressure filling material pushes the friction carrier and the adjustment pad to adjust the exposed height of the non-metallic slide plate. The support of the present invention can adjust the exposed height of the non-metallic slide plate at least twice through the first filling channel 6 and the second filling channel 7 during the design life cycle.

[0026] The friction pair is a rotating friction pair or a sliding friction pair. Regardless of the type of friction pair, the ejection part of the ejection mechanism is a non-metallic slide plate of the friction pair, and ejection can be achieved regardless of sliding or rotating.

[0027] The injection ports of the first filling channel 6 and the second filling channel 7 are provided with internal threads for installing a plug 8. When the support is not being filled with material, the plug 8 is used to block the first filling channel 6 and the second filling channel 7 to prevent dust from entering.

[0028] A sealing device is provided between the adjusting pad 31 and the side wall of the concave cavity, and filling is performed through the first filling channel 6. The sealing device can prevent the filling material at the first filling channel 6 from flowing into the periphery of the adjusting pad 31, causing the adjusting pad 31 to adhere to the inner wall of the concave cavity, making it impossible to lift the adjusting pad 31.

[0029] The sealing device is a sealing assembly composed of an O-ring or an O-ring plus a retaining ring, which is used to seal the gap between the adjusting pad and the edge of the concave cavity of the middle seat plate, and the adjusting pad and the friction carrier plate.

[0030] like Figure 8 , Fig. 9As shown, an injection channel 314 is opened on the upper surface and / or lower surface of the adjusting pad 31, the inlet of the injection channel 314 on the upper surface of the adjusting pad 31 is arranged corresponding to the outlet of the first filling channel 6, and the inlet of the injection channel 314 on the lower surface of the adjusting pad 32 is arranged corresponding to the outlet of the second filling channel 7. The injection channel 314 is used for high-pressure injection of filler so that the filler can flow in the annular channel, so that the filling material can better fill the gap.

[0031] The adjusting pad 31 is composed of an integrally arranged pad 313 and a retaining ring 312. The retaining ring 312 is arranged on the upper surface of the pad 313. The lower part of the friction carrier 32 is arranged in the space surrounded by the retaining ring 312 and the pad 313. The retaining ring 312 completely wraps the adjusting friction carrier 32 to prevent the first filling from adhering to the inside of the cavity and failing to lift the adjusting pad 31. A sealing device is arranged between the retaining ring 312 and the friction carrier 32.

[0032] The filling material is a polymer material which is liquid in the initial state and can be quickly solidified at room temperature.

[0033] The material of non-metallic slide plate is polymer wear-resistant plate, such as modified ultra-high molecular weight polyethylene, polytetrafluoroethylene, modified polytetrafluoroethylene, heat-resistant wear-resistant plate, etc. The surface of non-metallic slide plate is provided with oil storage pit or oil storage tank structure, the depth of which is not less than 1 / 2 of the thickness of the slide plate; the oil storage pit or oil storage tank is filled with solid lubricating material or grease; the shape of non-metallic slide plate matches the friction surface, which can be spherical, cylindrical or flat structure.

[0034] Example 1

[0035] like Figure 1 , Figure 2 The present invention is a schematic diagram of the structure of a cylindrical seismic isolation bearing suitable for ultra-long sliding distances, wherein the bearing is composed of an upper seat plate, a first friction pair 2, a middle seat plate combination, a second friction pair 4, a lower seat plate and other components; a concave cavity is arranged in the middle seat plate 3, and an ejection mechanism and a filling mechanism are arranged in the concave cavity. The ejection mechanism can be pushed to adjust the exposed height of the second non-metallic slide plate 41 by filling the concave cavity with a high-performance polymer through the filling mechanism, so as to realize that the bearing can adapt to the use requirements of ultra-long sliding distances.

[0036] The second friction pair 4 is composed of a second metal slide plate 42 on the lower seat plate and a second non-metal slide plate 41 embedded in the middle seat plate 3. The main function of the second friction pair 4 is sliding, and it must adapt to the requirements of ultra-long sliding distance within the design life cycle of the support.

[0037] Furthermore, the second non-metallic slide plate 41 is a cylindrical structure, with a thickness of not less than 12 mm at the thinnest point, and an initial restraint depth of not less than 8 mm.

[0038] Furthermore, the second non-metallic slide plate 41 is provided with a pit structure for storing lubricating and anti-friction material, and the pit depth is 9 mm.

[0039] The first friction pair 2 is composed of a first metal slide plate 22 on the middle seat plate 3 and a first non-metal slide plate 21 embedded in the upper seat plate. The main function of the first friction pair is rotation.

[0040] The middle seat plate assembly is composed of a ball crown plate, a friction carrier plate 32, an adjustment pad 31, a first metal slide plate 22, a second non-metal slide plate 41, a first filling channel 6, a second filling channel 7, and a filling channel end plugging structure.

[0041] Further, such as Figure 6 As shown, a second O-ring 311 is directly disposed between the inner wall of the concave cavity of the adjusting pad 31 and the spherical crown plate, and a first O-ring 321 of a sealing structure is also disposed between the friction carrier plate 32 and the adjusting pad 31 .

[0042] Further, such as Figure 7 As shown, two filling channels are opened on the side wall of the spherical crown plate, wherein the second filling channel 7 is opened at the bottom of the cavity, and the first filling channel 6 is opened on the side wall of the cavity; a plugging internal thread is opened at the injection port of the filling channel.

[0043] Furthermore, the discharge port of the second filling channel 7 is flush with the contact surface between the spherical crown plate and the adjusting pad 31 .

[0044] Furthermore, the bottom position of the first filling channel 6 is flush with the bottom contact interface of the friction pad 32 and the adjustment pad 31 .

[0045] Furthermore, blocking internal threads are provided at the ends of the first filling channel 6 and the second filling channel 7. Under normal conditions, a plug 8 is installed inside the blocking internal threads to block the filling channels.

[0046] The high-performance polymer is initially in a liquid state and can be cured and cross-linked to a solid state at room temperature. The cross-linked and cured polymer has excellent load-bearing properties, such as polyurethane.

[0047] When the bearing is operating normally, the bearing friction pair can meet the requirements of the bearing sliding and rotating functions. When the cumulative sliding distance of the bearing friction pair is long, and the exposed height of the second friction pair is lower than the minimum value, the exposed height of the second friction pair needs to be adjusted. When adjusting, first remove the plug at the end of the first filling channel 6, and then connect the high-pressure injection device to the first filling channel. Liquid polyurethane is added to the high-pressure injection device, and the liquid polyurethane is pressed into the concave cavity of the middle seat plate 3 through the first injection channel 6 by the high-pressure device. The high-pressure liquid polyurethane pushes the friction carrier plate and then pushes the second non-metallic slide plate 41 to move outward, so that the exposed height of the second non-metallic slide plate 41 increases, ensuring the sliding function of the bearing; at the same time, the liquid polyurethane can meet the long-term load-bearing use requirements of the bearing after cross-linking and curing in the concave cavity. As the bearing is used for a longer time, when the exposed height of the second non-metallic slide plate 41 is lower than the minimum value of the exposed height again, the exposed height of the second non-metallic slide plate 41 needs to be adjusted for the second time. When adjusting the exposed height of the second non-metallic slide plate 41 for the second time, remove the plug at the end of the second filling channel 7, and then connect the high-pressure injection device to the second filling channel 7. Add liquid polyurethane into the high-pressure injection device, and use the high-pressure device to press the liquid polyurethane into the concave cavity of the middle seat plate 3 through the second filling channel 7. The high-pressure liquid polyurethane pushes the adjustment pad to drive the friction carrier plate and the second non-metallic slide plate 41 to move outward, so that the exposed height of the second non-metallic slide plate 41 increases again, thereby ensuring the sliding function of the support.

[0048] Example 2

[0049] like Figure 3 , Figure 4 The present invention is a schematic diagram of a spherical bearing structure suitable for ultra-long sliding distances, wherein the bearing is composed of an upper seat plate, a first friction pair 2, a middle seat plate assembly, a second friction pair 4, a lower seat plate and other components; a concave cavity is arranged in the middle seat plate 3, and an ejection mechanism and a filling mechanism are arranged in the concave cavity. The ejection mechanism can be pushed to adjust the exposed height of the first non-metallic slide plate 21 by filling the concave cavity with a high-performance polymer through the filling mechanism, so as to realize that the bearing can adapt to the use requirements of ultra-long sliding distances.

[0050] The first friction pair 2 is composed of a first metal slide plate 22 on the upper seat plate and a first non-metal slide plate 21 embedded on the middle seat plate 3. The main function of the first friction pair is sliding, and it must meet the requirements of ultra-long sliding distance during the design life cycle of the support;

[0051] Furthermore, the first non-metallic slide plate 21 is a planar structure, the thickness of the first non-metallic slide plate is not less than 12 mm, and the initial restraint depth is not less than 8 mm.

[0052] Furthermore, the first non-metallic slide plate 21 is provided with a groove structure for storing lubricating and anti-friction materials, and the depth of the groove structure is 8 mm.

[0053] The second friction pair 4 is composed of a second metal slide plate 42 on the middle seat plate 3 and a second non-metal slide plate 41 embedded in the lower seat plate. The main function of the second friction pair is rotation.

[0054] The middle seat plate assembly is composed of a ball crown plate, a friction carrier plate 32, an adjustment pad 31, a first non-metallic slide plate 21, a second metal slide plate 42, a first filling channel 6, a second filling channel 7, and a plug 8 for the filling channel injection port.

[0055] Further, such as Figure 6 As shown, a sealing structure is directly provided between the adjusting pad 31 and the spherical crown plate, and a sealing structure is also provided between the friction carrier plate 32 and the adjusting pad 31 .

[0056] Further, such as Figure 7 As shown, two filling channels are opened on the side wall of the spherical crown plate, wherein the second filling channel 7 is opened at the bottom of the cavity, and the first filling channel 6 is opened on the side wall of the cavity; and a plugging internal thread is opened at the end of the filling channel.

[0057] Furthermore, the discharge port of the second filling channel 7 is flush with the contact surface of the spherical crown plate and the adjusting pad 31 .

[0058] Furthermore, the bottom position of the first filling channel 6 is flush with the bottom contact interface between the adjustment pad 31 and the friction carrier plate 32 .

[0059] Furthermore, blocking internal threads are provided at the ends of the first filling channel 6 and the second filling channel 7. Under normal conditions, a plug 8 is installed inside the blocking internal threads to block the filling channels.

[0060] The high-performance polymer is polyurethane, which is in a liquid state at the initial stage and can be cured and cross-linked to a solid state at room temperature. The cross-linked and cured polymer has excellent load-bearing performance.

[0061] When the bearing is operating normally, the bearing friction pair can meet the requirements of the bearing sliding and rotating functions. When the cumulative sliding distance of the bearing friction pair is long, the exposed height of the first friction pair is lower than the minimum value, and the exposed height of the first friction pair needs to be adjusted. When adjusting, first remove the plug at the end of the first filling channel 6, and then connect the high-pressure injection device to the first filling channel. Add liquid polyurethane to the high-pressure injection device, and use the high-pressure device to press the liquid polyurethane into the concave cavity of the middle seat plate 3 through the first injection channel 6. The high-pressure liquid polyurethane pushes the friction carrier plate and then pushes the first non-metallic slide plate 21 to move outward, so that the exposed height of the first non-metallic slide plate 21 increases, ensuring the sliding function of the bearing; at the same time, the liquid polyurethane can meet the long-term load-bearing use requirements of the bearing after cross-linking and curing in the concave cavity. As the bearing is used for a longer time, when the exposed height of the first non-metallic slide plate 21 is lower than the minimum value of the exposed height again, the exposed height of the first non-metallic slide plate 21 needs to be adjusted for the second time. When adjusting the exposed height of the first non-metallic slide plate 21 for the second time, remove the plug at the end of the second filling channel 7, and then connect the high-pressure injection device to the second filling channel. Add liquid polyurethane into the high-pressure injection device, and use the high-pressure device to press the liquid polyurethane into the concave cavity of the middle seat plate 3 through the second filling channel 7. The high-pressure liquid polyurethane pushes the adjustment pad to drive the friction carrier plate and the first non-metallic slide plate 21 to move outward, so that the exposed height of the first non-metallic slide plate 21 increases again, thereby ensuring the sliding function of the support.

[0062] Example 3

[0063] like Figure 5 The present invention is a schematic diagram of a hyperbolic seismic isolation bearing structure suitable for ultra-long sliding distances, wherein the bearing is composed of an upper seat plate, a first friction pair 2, a middle seat plate 3, a second friction pair 4, a lower seat plate and other components; a concave cavity is arranged in the middle seat plate 3, and an ejection mechanism and a filling channel are arranged in the concave cavity. By filling the concave cavity with a high-performance polymer through the filling channel, the ejection mechanism can be pushed to adjust the exposed height of the non-metallic slide plate of the first friction pair, so that the bearing can adapt to the use requirements of ultra-long sliding distances.

[0064] The first friction pair 2 is composed of a first metal slide plate 22 on the upper seat plate and a first non-metal slide plate 21 embedded in the middle seat plate 3. The main function of the first friction pair is sliding, and it must meet the requirements of ultra-long sliding distance within the design life cycle of the support.

[0065] Furthermore, the first non-metallic slide plate 21 is a spherical structure, the thickness of the non-metallic slide plate is not less than 12 mm, and the initial constraint depth is not less than 8 mm.

[0066] Furthermore, the first non-metallic slide plate 21 is provided with pits for storing lubricating and anti-friction materials, and the depth of the pit structure is 7.5 mm.

[0067] The second friction pair 4 is composed of a second metal slide plate 42 on the middle seat plate 3 and a second non-metal slide plate 41 embedded in the lower seat plate. The main function of the second friction pair is rotation.

[0068] The middle seat plate assembly is composed of a ball crown plate, a friction carrier plate 32, an adjustment pad 31, a first non-metallic slide plate 21, a second metal slide plate 42, a first filling channel 6, a second filling channel 7, and a plug 8 at the end of the filling channel.

[0069] Further, such as Figure 6 As shown, a sealing structure is provided between the adjusting pad 31 and the spherical crown plate, and a sealing structure is also provided between the friction carrier plate 32 and the adjusting pad 31 .

[0070] Further, such as Figure 7 As shown, two filling channels are opened on the side wall of the spherical crown plate, wherein the second filling channel 7 is opened at the bottom of the cavity, and the first filling channel 6 is opened on the side wall of the cavity; and a sealing internal thread is opened at the end of the filling channel.

[0071] Furthermore, the discharge port at the side wall of the second filling channel 7 is flush with the contact surface between the spherical crown plate and the adjusting pad 31 .

[0072] Furthermore, the bottom position of the first filling channel 6 is flush with the bottom contact interface between the adjustment pad 31 and the friction carrier plate 32 .

[0073] Furthermore, blocking threads are provided at the ends of the first filling channel 6 and the second filling channel 7. Under normal conditions, plugs are installed inside the blocking threads to block the filling channels.

[0074] The high-performance polymer is polyurethane, which is in a liquid state at the initial stage and can be cured and cross-linked to a solid state at room temperature. The cross-linked and cured polymer has excellent load-bearing performance.

[0075] When the bearing is operating normally, the bearing friction pair can meet the requirements of the bearing sliding and rotating functions. When the cumulative sliding distance of the bearing friction pair is long, and the exposed height of the first friction pair 2 is lower than the minimum value, the exposed height of the first friction pair 2 needs to be adjusted. When adjusting, first remove the plug at the end of the first filling channel 6, and then connect the high-pressure injection device to the first filling channel. Liquid polyurethane is added to the high-pressure injection device, and the liquid polyurethane is pressed into the concave cavity of the middle seat plate 3 through the first injection channel 6 by the high-pressure device. The high-pressure liquid polyurethane pushes the friction carrier plate and then pushes the first non-metallic slide plate 21 to move outward, so that the exposed height of the first non-metallic slide plate 21 increases, ensuring the sliding function of the bearing; at the same time, the liquid polyurethane can meet the long-term load-bearing use requirements of the bearing after cross-linking and curing in the concave cavity. As the bearing is used for a longer time, when the exposed height of the first non-metallic slide plate 21 is lower than the minimum value of the exposed height again, the exposed height of the first non-metallic slide plate 21 needs to be adjusted for the second time. When adjusting the exposed height of the first non-metallic slide plate 21 for the second time, remove the plug at the end of the second filling channel 7, and then connect the high-pressure injection device to the second filling channel. Add liquid polyurethane into the high-pressure injection device, and use the high-pressure device to press the liquid polyurethane into the concave cavity of the middle seat plate 3 through the second filling channel 7. The high-pressure liquid polyurethane pushes the adjustment pad to drive the friction carrier plate and the first non-metallic slide plate 21 to move outward, so that the exposed height of the first non-metallic slide plate 21 increases again, thereby ensuring the sliding function of the support.

Claims

1. A bridge bearing suitable for an ultra-long sliding distance, comprising a lower seat plate assembly (5) located below, a middle seat plate (3) placed on the lower seat plate assembly (5), and an upper seat plate assembly (1) located above the middle seat plate (3), wherein a matching friction pair is provided between the lower seat plate assembly (5) and the middle seat plate (3), and a matching friction pair is provided between the middle seat plate (3) and the upper seat plate assembly (1), wherein the friction pair is composed of a metal slide plate and a non-metal slide plate, and wherein: A concave cavity is provided on the top surface or the bottom surface of the middle seat plate (3) inlaid with a non-metallic slide plate, and an ejection mechanism is provided in the concave cavity. A filling mechanism for ejecting material from the ejection mechanism is provided on the side surface of the middle seat plate (3). The ejection mechanism comprises an adjustment pad (31) and a friction carrier plate (32) stacked in sequence in the concave cavity, and a non-metallic slide plate is installed above or below the friction carrier plate (32). The filling mechanism comprises a first filling flow channel (6) and a second filling flow channel (7). One end of the first filling flow channel (6) and the second filling flow channel (7) is a discharge port, and the other end is a material injection port for high-pressure filling. The discharge port of the first filling flow channel (6) is connected to the gap between the friction carrier plate (32) and the adjustment pad plate (31), and the discharge port of the second filling flow channel (7) is connected to the gap between the bottom of the concave cavity and the adjustment pad plate (31).

2. A bridge bearing suitable for ultra-long sliding distance as claimed in claim 1, characterized in that: The friction pair is a rotating friction pair or a sliding friction pair.

3. A bridge bearing suitable for ultra-long sliding distance as claimed in claim 1, characterized in that: Internal threads for installing a plug (8) are provided in the injection ports of the first filling flow channel (6) and the second filling flow channel (7).

4. A bridge bearing suitable for ultra-long sliding distance as claimed in claim 1, characterized in that: A sealing device is provided between the adjusting pad (31) and the side wall of the concave cavity.

5. The bridge bearing suitable for ultra-long sliding distance according to claim 1, characterized in that: An injection channel (314) is provided on the upper surface and / or the lower surface of the adjusting pad (31), the inlet of the injection channel (314) on one surface of the adjusting pad (31) is arranged correspondingly to the outlet of the first filling flow channel (6), and the inlet of the injection channel (314) on the other surface of the adjusting pad (31) is arranged correspondingly to the outlet of the second filling flow channel (7).

6. A bridge bearing suitable for ultra-long sliding distance as claimed in claim 1, characterized in that: The adjusting pad (31) is composed of an integrally arranged pad (313) and a retaining ring (312), wherein the retaining ring (312) is arranged on the upper surface of the pad (313), and the lower part of the friction carrier plate (32) is arranged in a space enclosed by the retaining ring (312) and the pad (313).

7. A bridge bearing suitable for ultra-long sliding distance as claimed in claim 6, characterized in that: A sealing device is provided between the retaining ring (312) and the friction carrier plate (32).

8. A bridge bearing suitable for ultra-long sliding distance according to claim 4 or 7, characterized in that: The sealing device is a sealing assembly consisting of an O-ring or an O-ring plus a retaining ring.

9. The bridge bearing suitable for ultra-long sliding distance according to claim 1, characterized in that: The filling material is a polymer material which is liquid in the initial state and can be quickly solidified at room temperature.

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