Anti-leakage viscous damper and method for long-span bridges under complex coupling loads

Abstract

The present invention discloses a viscous damper and method for preventing leakage of a long-span bridge under complex coupling loads. The damper comprises a fixing unit for connecting the damper; a damper unit arranged between the fixing units, comprising a main cylinder (6) and a sub-cylinder (10) which are nested and sealed and connected, and high-viscosity silicone oil (8) filled in the main cylinder (6); an exhaust energy storage unit, comprising an exhaust port (5) arranged on a side wall of the main cylinder (6), and an external hydraulic accumulator (20) connected to the exhaust port (5) through a thimble-type joint (22), which is used to exhaust the air in the main cylinder (6) and store energy; and an oil replenishment and pressure stabilization unit, comprising an oil replenishment port (9) arranged on the other side wall of the main cylinder (6), which is connected to an external oil replenishment pump (21) through a pipe joint (23). The damper of the present invention can quickly replenish the internal silicone oil after the damper leaks, so as to maintain the stable performance of the damper.

Description

Technical Field

[0001] The present invention belongs to the technical field of vibration reduction devices, and more specifically, relates to a leakage-proof viscous damper and a method for a long-span bridge under complex coupling loads. Background Art

[0002] Large-span bridge structures are usually prone to significant longitudinal displacement at the ends of the main beams under the loads generated by the movement of vehicles and irregular and strong pulsating winds. The vibrations caused by this action are characterized by low speed and large cumulative displacement, with daily cumulative displacements reaching tens of meters and annual cumulative displacements reaching tens of kilometers.

[0003] At present, viscous dampers are mostly used in long-span bridges to reduce the vibration caused by vehicle movement and irregular wind strength, and reduce the reaction of the structure after being acted upon by external forces; however, the output damping of viscous dampers is small at lower speeds, resulting in poor control of the loads generated by vehicle movement and the low-level vibration of the beam end caused by pulsating wind of irregular wind strength when used in long-span bridges. In addition, the friction distance between the piston rod and the dynamic seal in the viscous damper is long. During the friction process, a small amount of silicone oil attached to the surface of the piston rod is brought out of the main cylinder body and generates heat due to the friction of the silicone oil inside the main cylinder. Over time, it is easy to form visible leakage and the temperature inside the main cylinder body rises, resulting in a decrease in damper performance. When a conventional viscous damper leaks, air exists inside the main cylinder, causing the energy consumption capacity of the viscous damper to decrease and the longitudinal displacement of the main beam end to increase, further accelerating the leakage of the viscous damper. When the leakage develops to a certain extent, it generally needs to be replaced as a whole. The replacement cost is high, the construction period is long, and traffic closure is required, which has a great impact on the normal operation of the bridge. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a leakage-proof viscous damper and method for large-span bridges under complex coupling loads, which integrates an external hydraulic accumulator to discharge the air retained in the damper. At the same time, high-viscosity silicone oil is supplemented through an oil replenishment design to ensure that the silicone oil inside the damper is in a full state, effectively preventing the damper from leaking and maintaining the stable performance of the damper, thereby solving the technical problems such as the leakage of the viscous damper of a large-span bridge under the action of long-term complex coupling loads, resulting in a decrease in the damper performance.

[0005] In order to achieve the above object, according to one aspect of the present invention, a leakage-proof viscous damper for a long-span bridge under complex coupled loads is provided, comprising:

[0006] A fixing unit for connecting a damper;

[0007] A damper unit disposed between the fixing units, comprising a main cylinder body and a secondary cylinder body which are nested and sealed, and high-viscosity silicone oil filled in the main cylinder body;

[0008] An exhaust energy storage unit, comprising an exhaust port provided on a side wall of the master cylinder body, and an external hydraulic accumulator connected to the exhaust port through a thimble-type joint, for exhausting air in the master cylinder body and storing energy;

[0009] And an oil replenishment and pressure stabilization unit, including an oil replenishment port arranged on the other side wall of the main cylinder body, which is connected to an external oil replenishment pump through a pipe joint, and is used to replenish high-viscosity silicone oil to ensure that the silicone oil inside the main cylinder body is in a filled state and maintain the stability of the damper performance.

[0010] Further, the exhaust port includes an exhaust port inner channel connected to the high-viscosity silicone oil in the master cylinder;

[0011] The outer channel of the exhaust port is connected to the inner channel of the exhaust port through the exhaust port sealing valve core, and the exhaust port sealing valve core is automatically adjusted to discharge the air therein according to the pressure of the high-viscosity silicone oil in the master cylinder.

[0012] Further, the exhaust port comprises an exhaust port spring chamber provided between the exhaust port inner channel and the exhaust port sealing valve core;

[0013] An exhaust port spring is arranged in the exhaust port spring cavity and is elastically connected to the exhaust port sealing valve core for dynamically adjusting the opening of the exhaust port sealing valve core.

[0014] Further, the oil replenishing port includes an oil replenishing port inner channel connected to the master cylinder body;

[0015] The inner channel of the oil replenishing port is connected to the outer channel of the oil replenishing port through the oil replenishing port sealing valve core. When the pressure of the high-viscosity silicone oil in the master cylinder body is monitored to be lower than a threshold value, the high-viscosity silicone oil is automatically replenished into the master cylinder body until the oil pressure in the master cylinder body is stable.

[0016] Further, the oil replenishment port includes an oil replenishment port spring chamber provided between the oil replenishment port inner channel and the oil replenishment port sealing valve core;

[0017] The oil replenishment port spring cavity is provided with an oil replenishment port spring which connects the inner channel of the oil replenishment port with the oil replenishment port sealing valve core and is used for dynamically adjusting the opening of the oil replenishment port sealing valve core.

[0018] Further, the ejector-type joint includes a central ejector connected to the outer channel of the exhaust port;

[0019] A flow passage connected to the central ejector pin is used for filtering high-viscosity silicone oil.

[0020] Furthermore, the pipe-mounted joint includes a pipe-mounted passage connected to the outer channel of the oil replenishing port.

[0021] Further, the damper unit comprises a piston rod penetrating the main cylinder and the auxiliary cylinder;

[0022] A piston sleeved on the piston rod;

[0023] The main cylinder body and the auxiliary cylinder body, and the main cylinder body and the fixing unit are sealed and connected via end covers.

[0024] Furthermore, the fixing unit comprises:

[0025] A first fixing mechanism includes a first base and a first ear plate disposed on the first base;

[0026] The first base is provided with a first pin shaft hole, and the first ear plate is connected to the first base through the first pin shaft and the first pin shaft hole.

[0027] Furthermore, a second pin shaft hole is provided on the first base, and the first ear plate is connected to the first base via the first pin shaft and the second pin shaft hole.

[0028] Further, the first fixing mechanism comprises a first ear plate lifting ring provided on the first ear plate;

[0029] The first ear plate lifting ring comprises a first ear plate upper lifting ring and a first ear plate lower lifting ring.

[0030] Furthermore, the fixing unit comprises:

[0031] A second fixing mechanism includes a second base and a second ear plate disposed on the second base;

[0032] The second base is provided with a third pin shaft hole, and the second ear plate is connected to the second base via the second pin shaft and the third pin shaft hole.

[0033] Further, the second fixing mechanism comprises a second ear plate lifting ring provided on the main cylinder body;

[0034] The second ear plate lifting ring comprises a second ear plate upper lifting ring and a second ear plate lower lifting ring.

[0035] Furthermore, the fixing unit comprises:

[0036] A vertical lifting device provided on the lifting ring of the first ear plate;

[0037] A horizontal lifting device provided between the first ear plate lifting ring and the second ear plate lifting ring;

[0038] And a horizontal jack is arranged between the first ear plate and the main cylinder body.

[0039] According to a second aspect of the present invention, a method for preventing leakage of a viscous damper of a long-span bridge under complex coupling loads is provided, comprising the following steps:

[0040] S100: When a visible silicone oil leak occurs in the viscous damper under normal conditions, a vertical hanger connected to the lifting ring on the first ear plate, a horizontal hanger connecting the lifting ring on the first ear plate and the lifting ring on the second ear plate and fixed between the lower lifting ring of the first ear plate and the lower lifting ring of the second ear plate, and a horizontal jack between the first ear plate and the main cylinder body for always maintaining the relative position of the first ear plate and the damper unit;

[0041] S200: When the viscous damper with visible leakage is replenished with oil and exhausted, the first pin on the first ear plate is removed, and the first ear plate is longitudinally lifted, and the lifting ring on the first ear plate is lifted to the second pin hole of the first base, so that the second pin hole and the first pin are in a concentric relative position, and are inserted and fixed. If the position cannot be determined to be correctly concentric, it is necessary to use a vertical hoist to adjust the longitudinal height, and a horizontal hoist and a horizontal jack to adjust the horizontal position, and adjust the length of the piston rod outside the main cylinder body to make the horizontal position of the first pin concentric;

[0042] S300: Connect the ejector-type joint, the pipe-mounted joint to the exhaust port and the oil replenishing port, connect the external hydraulic accumulator to the ejector-type interface, and connect the external oil replenishing pump to the pipe-mounted joint; the main cylinder body is always in a tilted state, so that the pressure difference between the main cylinder body and the external oil replenishing pump within a certain range causes the silicone oil in the external oil replenishing pump to flow into the main cylinder body for replenishment; in the tilted state, the external hydraulic accumulator is connected to the exhaust port, and the bubbles in the main cylinder body can be discharged to the external hydraulic accumulator through the exhaust port, and the excess silicone oil will flow back into the main cylinder body due to the two-way circulation, thereby achieving the effect of oil replenishment and exhaust.

[0043] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0044] 1. The damper of the present invention integrates an external hydraulic accumulator to discharge the air retained in the damper, and at the same time, the high-viscosity silicone oil is supplemented through the oil replenishment design to ensure that the silicone oil inside the damper is in a full state, which effectively prevents the damper from leaking and maintains the stable performance of the damper. It solves the technical problems such as the leakage of the viscous damper of the large-span bridge under the action of long-term complex coupling loads, resulting in the degradation of the damper performance.

[0045] 2. The piston rod of the damper of the present invention is made of high-quality carbon structural steel, low-alloy structural steel, alloy structural steel and the like, and is coated with a metal bonding layer of a self-melting alloy and a ceramic working layer of a WC tungsten carbide ceramic series in sequence on its surface, wherein the thickness of the metal bonding layer is in the range of 60μm-100μm, and the thickness of the ceramic working layer is not less than 200μm, thereby ensuring that the surface of the piston rod is smooth and flat for a long time and reducing leakage caused by wear of the end cover.

[0046] 3. The damper of the present invention has a main cylinder body whose outer surface is coated with a polymer as a base material and a filler with good thermal conductivity, thereby increasing the thermal radiation coefficient of the main cylinder body surface, thereby increasing the heat exchange rate of the object surface, and effectively controlling the cylinder body surface temperature at a low level, thereby improving the stability and durability of the silicone oil seal.

[0047] 4. The damper of the present invention always maintains a two-way flow state at the exhaust port. The pipe-mounted joint connected to the oil replenishment port includes a pipe-mounted passage. When the external oil replenishment pump is connected to the oil replenishment port through the pipe-mounted joint and opened, the pressure of the external oil replenishment pump is higher than the internal pressure of the main cylinder body, and the pipe-mounted passage of the pipe-mounted joint is a direct connection type, that is, when the oil replenishment port is opened, it is in a one-way flow state. Due to the pressure difference, the silicone oil in the external oil replenishment pump automatically flows to the oil replenishment port and enters the main cylinder body, achieving a supplementary effect of pressure balance.

[0048] 5. In the damper of the present invention, during the oil replenishing and exhausting process, the main cylinder body is always in a tilted state, so that the pressure difference between the main cylinder body and the external oil replenishing pump is within a certain range, causing the silicone oil in the external oil replenishing pump to flow into the main cylinder body for replenishment; and in the tilted state, the external hydraulic accumulator is connected to the exhaust port, and the bubbles in the main cylinder body can be discharged to the external hydraulic accumulator through the exhaust port, and the excess silicone oil will flow back into the main cylinder body due to the two-way circulation, thereby achieving the effect of oil replenishing and exhausting, and extending the service life of the viscous damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic structural diagram of a viscous damper capable of on-site oil replenishment in a normal service state according to an embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of the exhaust port structure of a viscous damper capable of on-site oil replenishment according to an embodiment of the present invention;

[0051] Figure 3 This is a schematic diagram of the exhaust port structure of a viscous damper capable of on-site oil replenishment under normal service conditions according to an embodiment of the present invention;

[0052] Figure 4 It is a structural schematic diagram of a viscous damper capable of on-site oil replenishment according to an embodiment of the present invention, in which the ear plate adjusts the connection position between the first ear plate and the first base during the oil replenishment operation;

[0053] Figure 5 It is a schematic diagram of the oil replenishment and exhaust state structure of a viscous damper master cylinder capable of on-site oil replenishment according to an embodiment of the present invention;

[0054] Figure 6 This is a schematic structural diagram of a pin-type joint connection between an external hydraulic accumulator of a viscous damper capable of on-site oil replenishment and an exhaust port according to an embodiment of the present invention;

[0055] Figure 7 This is a structural schematic diagram of a viscous damper ejector-type joint capable of on-site oil replenishment connected to an exhaust port according to an embodiment of the present invention;

[0056] Figure 8 This is a schematic diagram of a tubular joint structure between an external oil replenishment pump and an oil replenishment port of a viscous damper capable of on-site oil replenishment according to an embodiment of the present invention;

[0057] Fig. 9 The present invention is a schematic diagram of a connection structure between a tubular joint of a viscous damper capable of on-site oil replenishment and an oil replenishment port.

[0058] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-first base, 2-first ear plate, 3-piston rod, 4-end cover, 5-exhaust port, 6-main cylinder, 7-piston, 8-high viscosity silicone oil, 9-oil replenishing port, 10-auxiliary cylinder, 11-second ear plate, 12-second base, 13-first pin shaft, 14-second pin shaft, 15-first ear plate lifting ring, 16-second ear plate lifting ring, 17-vertical hanger, 18-horizontal hanger, 19-horizontal jack, 20-external hydraulic accumulator, 21-external oil replenishing pump, 22-thimble type joint, 23-pipe joint, 10 1-first pin shaft hole, 102-second pin shaft hole, 121-third pin shaft hole, 151-first ear plate upper lifting ring, 152-first ear plate lower lifting ring, 161-second ear plate lifting ring, 162-second ear plate lower lifting ring, 221-flow passage, 222-center ejector pin, 231-tube-mounted passage, 51-exhaust port outer channel, 52-exhaust port sealing valve core, 53-exhaust port spring chamber, 54-exhaust port spring, 55-exhaust port inner channel, 91-oil replenishment port outer channel, 92-oil replenishment port sealing valve core, 93-oil replenishment port spring chamber, 94-oil replenishment port spring, 95-oil replenishment port inner channel. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0060] like Figure 1 , 5 As shown, in an embodiment of the present invention, a viscous damper capable of on-site oil replenishment is provided, which comprises: a damper unit for output damping, a fixing connection unit connected to the damper to fix it, and an oil replenishment and exhaust unit for maintaining and replenishing the damper with visible leakage.

[0061] The damper unit includes: a piston rod 3 and a sub-cylinder 10 connected to a fixed connection unit, a piston 7 moving on the piston rod 3, a main cylinder 6 forming an annular gap structure with the piston 7, a high-viscosity silicone oil 8 poured between the piston 7 and the main cylinder 6, and end caps 4 respectively provided at both ends of the upper and lower sides of the main cylinder 6. The end caps 4 are fixedly connected to the main cylinder 6, the piston rod 3 and the end caps 4 can be horizontally dynamically sealed, and a closed environment is formed inside the main cylinder 6 to prevent leakage of the high-viscosity silicone oil 8; the piston 7 is concentric with the main cylinder 6 to form an annular gap structure. In order to reduce the temperature rise caused by the wear and friction of the seal when the piston rod 3 moves against the end cover 4, the piston rod 3 is made of high-quality carbon structural steel, low-alloy structural steel, alloy structural steel and other materials, and is coated with a metal bonding layer of self-melting alloy and a ceramic working layer of WC tungsten carbide ceramic series on its surface in sequence, wherein the thickness of the metal bonding layer is in the range of 60μm-100μm, and the thickness of the ceramic working layer is not less than 200μm, so as to ensure that the surface of the piston rod 3 is smooth and flat for a long time and reduce the leakage caused by the wear of the end cover 4. When longitudinal displacement occurs at the end of a long-span bridge beam, a certain amount of heat is generated inside the main cylinder 6 while the piston rod 3 and the piston 7 move. When the temperature inside the cylinder is too high, it is easy to cause instability of the silicone oil and the sealing performance, affecting the service life of the viscous damper. In this embodiment, the outer surface of the main cylinder 6 is coated with a polymer as a base material and a filler with good thermal conductivity, thereby increasing the thermal radiation coefficient of the surface of the main cylinder 6, thereby increasing the heat exchange rate of the object surface, and effectively controlling the surface temperature of the cylinder at a low level, thereby improving the stability and durability of the silicone oil seal.

[0062] The fixed connection unit includes: a first ear plate 2 connected to the piston rod 3, a second ear plate 11 connected to the auxiliary cylinder body 10 and corresponding to the first ear plate 2, a first ear plate upper lifting ring 151 and a first ear plate lower lifting ring 152 arranged at the upper and lower ends of the first ear plate 2, a second ear plate upper lifting ring 161 and a second ear plate lower lifting ring 162 arranged at the upper and lower ends of the main cylinder body 6 close to the first ear plate 2, a first pin 13 is provided on the first ear plate 2 and is fixed through two pin holes at different heights on the first base 1, wherein the second pin hole 102 is located higher than the first pin hole 101; and a second pin 14 is provided on the second ear plate 2 connected to the auxiliary cylinder body 10 so that it is fixed to the second base 12 through a third pin hole 121. When the viscous damper is in normal use, the first ear plate 2 will be fixedly connected to the first base 1 through the first pin shaft 13 and the first pin shaft hole 101, so that the main cylinder body 6 is in a horizontal state; when the viscous damper is under maintenance for exhaust and oil replenishment, the first pin shaft 13 on the first ear plate 2 is fixedly connected to the first base 1 through the second pin shaft hole 102, so that the main cylinder body 6 is in a tilted state; in both states, the second pin shaft 14 on the second ear plate 11 is always connected and fixed to the second base 12 through the third pin shaft hole 121 to keep one side of the damper stable.

[0063] The oil replenishing and exhausting unit includes: an exhaust port 5 arranged on the upper side of the main cylinder body 6 near one end of the first ear plate 2, an oil replenishing port 9 arranged on the lower side of the main cylinder body 6 near one end of the second ear plate 11, a pin-type joint 22 connected to the exhaust port 5, an external hydraulic accumulator 20 connected to the pin-type joint 22 for receiving exhausted bubbles and silicone oil, a pipe-mounted joint 23 connected to the oil replenishing port 9 for transmitting silicone oil, and an external oil replenishing pump 21 connected to the pipe-mounted joint 23 for replenishing silicone oil.

[0064] like Figure 1 , 2 As shown in Figures 3 and 4, the oil replenishment port 9 and the exhaust port 5 in the oil replenishment and exhaust unit are both arranged at the two ends of the upper and lower sides of the main cylinder body 6, and the oil replenishment port 9 and the exhaust port 5 have the same structure, and are both self-closing valves, that is, when not connected to other parts and devices, they remain in a closed state, and when the viscous damper is in normal use, it is ensured that the high-viscosity silicone oil 8 in the main cylinder body 6 cannot leak from the oil replenishment and exhaust unit. Because the oil replenishment port 9 has the same structure as the exhaust port 5, the exhaust port 5 includes: an exhaust port outer channel 51, an exhaust port sealing valve core 52, an exhaust port spring chamber 53, an exhaust port spring 54, and an exhaust port inner channel 55. The same oil replenishment port 9 includes: an oil replenishment port outer channel 91, an oil replenishment port sealing valve core 92, an oil replenishment port spring chamber 93, an oil replenishment port spring 94, and an oil replenishment port inner channel 95. The exhaust port 5 and the oil replenishing port 9 are both arranged on the main cylinder body 6, that is, the high-viscosity silicone oil 8 can reach the exhaust port spring chamber 53 and the oil replenishing port spring chamber 93 through the exhaust port inner channel 55 and the oil replenishing port inner channel 95.

[0065] like Figure 6 , 7 As shown in Figures 8 and 9, the ejector pin type joint 22 in the oil replenishing and exhausting unit is connected to the exhaust port 5, and the pipe-mounted joint 23 is connected to the oil replenishing and exhausting port 9. The ejector pin type joint 22 includes a flow passage 221 and a center ejector pin 222. When the external hydraulic accumulator 20 is connected to the exhaust port 5 through the ejector pin type joint 22, the exhaust port 5 is opened and due to the "U"-shaped hollow structure of the center ejector pin 222, the exhaust port spring 54 can move downward into the exhaust port spring cavity 53, so that excess bubbles and silicone oil pass through the exhaust port inner channel 55 and the exhaust port spring cavity 53 to reach the flow passage 221 and the external hydraulic accumulator 20. The silicone oil entering the external hydraulic accumulator 20 can partially flow back into the main cylinder body 6, and the exhaust port 5 always maintains a two-way flow state. The pipe joint 23 connected to the oil replenishing port 9 includes a pipe passage 231. When the external oil replenishing pump 21 is connected to the oil replenishing port 9 through the pipe joint 23 and opened, the pressure of the external oil replenishing pump 21 is higher than the internal pressure of the main cylinder body 6, and the pipe passage 231 of the pipe joint 23 is a direct connection type, that is, when the oil replenishing port 9 is opened, it is in a one-way flow state. Due to the pressure difference, the silicone oil in the external oil replenishing pump 21 automatically flows to the oil replenishing port 9 and then enters the inside of the main cylinder body 6, thereby achieving a supplementary effect of pressure balance.

[0066] like Figure 1 , 4As shown in Figure 5, in another embodiment of the present invention, when a visible silicone oil leakage occurs in the viscous damper under normal conditions, resulting in a small output damping of the viscous damper, it should be repaired in time to replenish oil and exhaust air. At this time, the auxiliary positioning unit connected to the fixed connection unit includes: a vertical hanger 17 connected to the lifting ring 151 on the first ear plate, a horizontal hanger 18 connecting the lifting ring 151 on the first ear plate and the lifting ring 161 on the second ear plate and fixedly connected between the lower lifting ring 152 of the first ear plate and the lower lifting ring 162 of the second ear plate, and a horizontal jack 19 provided between the first ear plate 2 and the main cylinder body 6 to always maintain the relative position of the first ear plate 2 and the damper unit. When replenishing oil and exhausting air to a viscous damper with visible leakage, it is necessary to use an auxiliary positioning device to remove the first pin 13 on the first ear plate 2, and longitudinally lift the first ear plate 2 through the lifting ring 151 on the first ear plate to the second pin hole 102 of the first base 1, so that the second pin hole 102 and the first pin 13 are in a concentric relative position, and are inserted and fixed. If the position cannot be determined to be correctly concentric, it is necessary to use a vertical hanger 17 to adjust the longitudinal height, and a horizontal hanger 18 and a horizontal jack 19 to adjust the horizontal position. The horizontal position of the first pin 13 can be appropriately adjusted by adjusting the length of the piston rod 3 outside the main cylinder body 6; after insertion and fixation, the auxiliary positioning unit can be revoked. The ejector-type joint 22 and the pipe-mounted joint 23 are connected to the exhaust port 5 and the oil replenishment port 9, and further, the external hydraulic accumulator 20 is connected to the ejector-type interface 22, and the external oil replenishment pump 21 is connected to the pipe-mounted joint 23; because during this oil replenishment and exhaust process, the main cylinder body 6 is always in a tilted state, so that the pressure difference between the main cylinder body 6 and the external oil replenishment pump 21 within a certain range causes the silicone oil in the external oil replenishment pump 21 to flow into the main cylinder body 6 for replenishment; and in the tilted state, the external hydraulic accumulator 20 is connected to the exhaust port 5, and the bubbles in the main cylinder body 6 can be discharged to the external hydraulic accumulator through the exhaust port 5, and the excess silicone oil will flow back into the main cylinder body 6 due to the two-way circulation, thereby achieving the effect of oil replenishment and exhaust, extending the service life of the viscous damper, and avoiding the high cost and long construction period of overall replacement.

[0067] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A viscous damper for preventing leakage of a long-span bridge under complex coupling loads, characterized in that: include: A fixing unit for connecting a damper; A damper unit disposed between the fixing units, comprising a main cylinder body (6) and a secondary cylinder body (10) which are nested and sealed, and high-viscosity silicone oil (8) filled in the main cylinder body (6); An exhaust energy storage unit, comprising an exhaust port (5) provided on a side wall of the main cylinder (6), and an external hydraulic accumulator (20) connected to the exhaust port (5) via a thimble-type joint (22), and used for exhausting air in the main cylinder (6) and storing energy; and an oil replenishment and pressure stabilization unit, comprising an oil replenishment port (9) provided on the other side wall of the main cylinder (6), which is connected to an external oil replenishment pump (21) via a pipe joint (23) and is used to replenish high-viscosity silicone oil (8) to ensure that the silicone oil inside the main cylinder (6) is in a filled state, thereby maintaining stable damper performance; The exhaust port (5) comprises an exhaust port inner channel (55) connected to the high-viscosity silicone oil (8) in the main cylinder (6); An exhaust port outer channel (51) connected to the exhaust port inner channel (55) via an exhaust port sealing valve core (52) automatically adjusts the exhaust port sealing valve core (52) to discharge air therein according to the pressure of the high-viscosity silicone oil (8) in the main cylinder (6); The exhaust port (5) comprises an exhaust port spring chamber (53) provided between the exhaust port inner channel (55) and the exhaust port sealing valve core (52); An exhaust port spring (54) is provided in the exhaust port spring chamber (53) and is elastically connected to the exhaust port sealing valve core (52) for dynamically adjusting the opening of the exhaust port sealing valve core (52); The oil replenishment port (9) comprises an oil replenishment port inner channel (95) connected to the main cylinder body (6); The inner channel (95) of the oil replenishing port is connected to the outer channel (91) of the oil replenishing port through the oil replenishing port sealing valve core (92), and when the pressure of the high-viscosity silicone oil (8) in the main cylinder (6) is detected to be lower than a threshold value, the high-viscosity silicone oil (8) is automatically replenished into the main cylinder (6) until the oil pressure in the main cylinder (6) is stabilized; The oil replenishment port (9) comprises an oil replenishment port spring chamber (93) provided between the oil replenishment port inner channel (95) and the oil replenishment port sealing valve core (92); The oil replenishment port spring cavity (93) is provided with an oil replenishment port spring (94) connecting the oil replenishment port inner channel (95) and the oil replenishment port sealing valve core (92) for dynamically adjusting the opening of the oil replenishment port sealing valve core (92); The ejector-type joint (22) comprises a central ejector (222) connected to the outer channel (51) of the exhaust port; A flow passage (221) connected to the central ejector pin (222) and used for filtering high-viscosity silicone oil (8); The pipe-mounted joint (23) comprises a pipe-mounted passage (231) connected to the outer channel (91) of the oil replenishment port; When the external hydraulic accumulator (20) is connected to the exhaust port (5) via the ejector pin joint (22), the exhaust port (5) is opened and the exhaust port spring (54) can enter the exhaust port spring chamber (53) downward due to the "U"-shaped hollow structure of the central ejector pin (222), so that excess bubbles and silicone oil can pass through the exhaust port inner channel (55) and the exhaust port spring chamber (53) to reach the flow channel (221) and the external hydraulic accumulator (20). The silicone oil that has entered the external hydraulic accumulator (20) can partially flow back into the main cylinder (6), and the exhaust port (5) always maintains a two-way flow state; When the external oil replenishing pump (21) is connected to the oil replenishing port (9) through the pipe-mounted joint (23) and opened, the pressure of the external oil replenishing pump (21) is higher than the internal pressure of the main cylinder (6), and the pipe-mounted passage (231) of the pipe-mounted joint (23) is of a direct connection type, that is, when the oil replenishing port (9) is opened, it is in a one-way flow state. Due to the pressure difference, the silicone oil in the external oil replenishing pump (21) automatically flows to the oil replenishing port (9) and enters the interior of the main cylinder (6), thereby achieving a supplementary effect of pressure balance.

2. The anti-leakage viscous damper for a long-span bridge under complex coupling loads according to claim 1 is characterized in that: The damper unit comprises a piston rod (3) penetrating the main cylinder (6) and the auxiliary cylinder (10); A piston (7) sleeved on the piston rod (3); The main cylinder body (6) and the auxiliary cylinder body (10), and the main cylinder body (6) and the fixed unit are sealed and connected via the end cover (4).

3. The anti-leakage viscous damper for a long-span bridge under complex coupling loads according to claim 1 is characterized in that: The fixing unit comprises: A first fixing mechanism comprises a first base (1) and a first ear plate (2) arranged on the first base (1); The first base (1) is provided with a first pin shaft hole (101), and the first ear plate (2) is connected to the first base (1) via a first pin shaft (13) and the first pin shaft hole (101).

4. The anti-leakage viscous damper for a long-span bridge under complex coupling loads according to claim 3 is characterized in that: The first base (1) is also provided with a second pin shaft hole (102), and the first ear plate (2) is connected to the first base (1) via the first pin shaft (13) and the second pin shaft hole (102).

5. The anti-leakage viscous damper for a long-span bridge under complex coupling loads according to claim 4 is characterized in that: The first fixing mechanism comprises a first ear plate lifting ring (15) provided on the first ear plate (2); The first ear plate lifting ring (15) comprises a first ear plate upper lifting ring (151) and a first ear plate lower lifting ring (152).

6. The anti-leakage viscous damper for a long-span bridge under complex coupling loads according to claim 5 is characterized in that: The fixing unit comprises: A second fixing mechanism, comprising a second base (12) and a second ear plate (11) arranged on the second base (12); The second base (12) is provided with a third pin shaft hole (121), and the second ear plate (11) is connected to the second base (12) via the second pin shaft (14) and the third pin shaft hole (121).

7. The anti-leakage viscous damper for a long-span bridge under complex coupling loads according to claim 6 is characterized in that: The second fixing mechanism comprises a second ear plate lifting ring (16) provided on the main cylinder body (6); The second ear plate lifting ring (16) comprises a second ear plate upper lifting ring (161) and a second ear plate lower lifting ring (162).

8. A viscous damper for preventing leakage of a long-span bridge under complex coupling loads according to any one of claims 5 to 7, characterized in that: The fixing unit comprises: A vertical lifting device (17) provided on the first ear plate lifting ring (15); A horizontal lifting device (18) provided between the first ear plate lifting ring (15) and the second ear plate lifting ring (16); And a horizontal jack (19) arranged between the first ear plate (2) and the main cylinder body (6).

9. A method for preventing leakage of a viscous damper of a long-span bridge under complex coupling loads, the method using the viscous damper for preventing leakage of a long-span bridge under complex coupling loads as claimed in claim 8, characterized in that: The steps include: S100: When a visible silicone oil leak occurs in the viscous damper under normal conditions, a vertical hanger connected to the lifting ring on the first ear plate, a horizontal hanger connecting the lifting ring on the first ear plate and the lifting ring on the second ear plate and fixed between the lower lifting ring of the first ear plate and the lower lifting ring of the second ear plate, and a horizontal jack between the first ear plate and the main cylinder body for always maintaining the relative position of the first ear plate and the damper unit; S200: When the viscous damper with visible leakage is replenished with oil and exhausted, the first pin on the first ear plate is removed, and the first ear plate is longitudinally lifted, and the lifting ring on the first ear plate is lifted to the second pin hole of the first base, so that the second pin hole and the first pin are in a concentric relative position, and are inserted and fixed. If the position cannot be determined to be correctly concentric, it is necessary to use a vertical hoist to adjust the longitudinal height, and a horizontal hoist and a horizontal jack to adjust the horizontal position, and adjust the length of the piston rod outside the main cylinder body to make the horizontal position of the first pin concentric; S300: Connect the ejector-type joint, the pipe-mounted joint to the exhaust port and the oil replenishing port, connect the external hydraulic accumulator to the ejector-type interface, and connect the external oil replenishing pump to the pipe-mounted joint; the main cylinder body is always in a tilted state, so that the pressure difference between the main cylinder body and the external oil replenishing pump within a certain range causes the silicone oil in the external oil replenishing pump to flow into the main cylinder body for replenishment; in the tilted state, the external hydraulic accumulator is connected to the exhaust port, and the bubbles in the main cylinder body can be discharged to the external hydraulic accumulator through the exhaust port, and the excess silicone oil will flow back into the main cylinder body due to the two-way circulation, thereby achieving the effect of oil replenishment and exhaust.

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