Parallel Cable Stay Tower End Built-in Damper Replacement Device and Method

Abstract

The present invention discloses a replacement device and method for an in-tower-end built-in damper of a parallel wire stay cable, comprising: at least two groups of clamping systems, wherein each clamping system includes: a cylinder barrel, a middle-layer inner cylinder having a piston, a spring system, a core-layer piston rod having a piston, and a hydraulic power system; the middle-layer inner cylinder is sleeved in the cylinder barrel and both ends thereof extend out of the cylinder barrel, and the core-layer piston rod is sleeved in the middle-layer inner cylinder; and a fixed seat for fixing the relative positions between the cylinder barrels. The present invention makes full use of mechanized and automated means to improve the construction safety and reliability of replacing the in-tower-end built-in damper, and solves the problems of poor accuracy, high safety risk, low standardization degree, etc. existing in the original simple hook tool.

Description

Technical Field

[0001] The present invention relates to the field of bridge maintenance. More specifically, the present invention relates to a replacement device and method for an in-tower-end built-in damper of a parallel wire stay cable. Background Art

[0002] Stay cables are the key parts and main load-bearing components of cable-stayed bridges. With the increase of the span, due to the characteristics of large flexibility, small mass and small damping of the cables, they are extremely prone to vibration under the action of loads such as wind, rain, earthquake and traffic. The long-term large-amplitude vibration of the stay cables has a great impact on the durability of the structure and components. The performance degradation, displacement and loss of the stay cable damper are among them. The damper can reduce the vibration of the stay cable caused by strong wind, heavy rain or vehicle driving, so as to extend the service life of the bridge. With the extension of the bridge operation time, the in-anchor-end built-in damper may become loose or displaced. If there is no anti-falling device such as a general's cap at the tower end, the damper assembly will be missing, and the damper will lose its original vibration suppression function. Since the in-tower-end built-in damper belongs to the accessory structure of the stay cable, and due to the limited operation space and the lack of professional replacement tools, it is generally not regarded as the key maintenance or repair object and is often ignored. Even if replacement is really needed, generally a simple hook made of steel bars is used to manually remove the missing or displaced damper from the cable duct for maintenance, which has problems such as poor accuracy, high safety risk and low standardization. Summary of the Invention

[0003] The purpose of the present invention is to provide a replacement device and method for an in-tower-end built-in damper of a parallel wire stay cable, which makes full use of mechanized and automated means to improve the construction safety and reliability of replacing the in-tower-end built-in damper, and solves the problems of poor accuracy, high safety risk and low standardization existing in the original simple hook tool.

[0004] To achieve these and other advantages in accordance with the present invention, there is provided a replacement device for an in-tower-end built-in damper of a parallel wire stay cable, comprising:

[0005] At least two sets of clamping systems, the clamping system comprising: a cylinder barrel, a middle-layer inner cylinder with a piston, a spring system, a core-layer piston rod with a piston and a hydraulic power system; the middle-layer inner cylinder is sleeved in the cylinder barrel and both ends extend out of the cylinder barrel, and the core-layer piston rod is sleeved in the middle-layer inner cylinder;

[0006] A fixed seat for fixing the relative positions between the cylinder barrels;

[0007] Among them, the middle-layer inner cylinder is a hollow tubular structure. A block-shaped elbow a is fixedly arranged at one end of the middle-layer inner cylinder, and a hand-held handle is fixedly arranged at the other end. An oil inlet and outlet are arranged at the other end. A spring system is connected between one end inside the middle-layer inner cylinder and the core-layer piston rod. The end of the core-layer piston rod is in close contact with the spring system and makes the spring bear a certain pressure. The core-layer piston rod has a block-shaped elbow b, and the bent part of the block-shaped elbow b extends out of the middle-layer inner cylinder. A long groove is arranged on the middle-layer inner cylinder, and the block-shaped elbow of the core-layer piston rod can slide along the long groove.

[0008] Oil inlet and outlets are arranged at both ends of the cylinder barrel. The forward or backward movement of the middle-layer inner cylinder and the forward movement of the core-layer piston rod are controlled by a hydraulic power system.

[0009] Preferably, the fixing seats are two groups of hoop-shaped bases, which are respectively fixed at both ends of the cylinder barrel.

[0010] Preferably, the hydraulic power system includes an oil tank, a hydraulic pump device, an oil pipe connecting the oil tank and the oil inlet and outlet (the middle-layer inner cylinder and the cylinder barrel), and a control system for controlling the oil circuit installed on the oil tank.

[0011] The present invention also provides a method for taking out an in-built damper by using the replacement device, including the following steps:

[0012] Step 1: Connect the hydraulic power system with the oil inlet and outlet of the cylinder barrel and the oil inlet and outlet of the middle-layer inner cylinder through pipelines, and tightly fasten and connect the fixing seats with the cable body at an appropriate position of the stay cable.

[0013] Step 2: Adjust the posture of the block-shaped elbow a of the middle-layer inner cylinder by using the hand-held handle of the middle-layer inner cylinder so that it can pass through the gap between the stay cable duct and the in-built damper. Then start the control valve of the middle-layer inner cylinder corresponding to the hydraulic power system to extend the middle-layer inner cylinder until the block-shaped elbow a extends to the inner end face D-1 of the in-built damper at the tower end.

[0014] Step 3: Rotate the middle-layer inner cylinder 90 degrees by using the hand-held handle of the middle-layer inner cylinder so that the block-shaped elbow a is in a hooked posture and hooks the inner end face D-1 of the in-built damper.

[0015] Step 4: Start the control valve of the core-layer piston rod corresponding to the hydraulic power system to extend the core-layer piston rod until the block-shaped elbow b of the core-layer piston rod is in close contact with the outer end face D-2 of the in-built damper. At this time, the block-shaped elbow a and the block-shaped elbow b clamp the in-built damper.

[0016] Step 5: Reverse-start the control valve of the middle-layer inner cylinder to retract the middle-layer inner cylinder, drive the in-built damper to extend out of the duct, close the control valve of the core-layer piston rod, and make it retract under the action of the spring system to cancel the clamping state of the block-shaped elbow b on the in-built damper, so as to take out the in-built damper.

[0017] The present invention also provides a method for installing an in-line damper by using the replacement device, including the following steps:

[0018] Step 1: Pre-install the in-line damper on the stay cable, and the inner end face D-1 of the in-line damper and the block-shaped elbow a of the middle-layer inner cylinder are basically in close contact. Fine-tune the middle-layer inner cylinder so that the block-shaped elbow a extends to and is in close contact with the inner end face of the in-line damper at the tower end, presenting a hooked state;

[0019] Step 2: Start the control valve of the core-layer piston rod corresponding to the hydraulic power system to extend the core-layer piston rod until the block-shaped elbow b of the core-layer piston rod is in close contact with the outer end face D-2 of the in-line damper. At this time, the block-shaped elbow a and the block-shaped elbow b clamp the in-line damper;

[0020] Step 3: Start the control valve of the middle-layer inner cylinder corresponding to the hydraulic power system to extend the middle-layer inner cylinder, driving the in-line damper into the predetermined position of the cable duct;

[0021] Step 4: Tighten the fastening nut of the in-line damper so that the in-line damper is tightly clamped between the stay cable duct and the cable body and does not fall;

[0022] Step 5: Cooperate to start the control valve of the middle-layer inner cylinder, the control valve of the core-layer piston rod, and the handheld handle, loosen the block-shaped elbow a and the block-shaped elbow b, and rotate the middle-layer inner cylinder by 90 degrees so that the middle-layer inner cylinder and the block-shaped elbow a retract from the gap between the in-line damper and the cable duct, and remove this set of devices.

[0023] The present invention also provides a method for replacing an in-line damper by using the replacement device, including the following steps:

[0024] Step 1: Connect the hydraulic power system to the oil inlet and outlet of the cylinder barrel and the oil inlet and outlet of the middle-layer inner cylinder through pipelines, and tightly connect the fixing seat to the cable body at an appropriate position of the stay cable;

[0025] Step 2: Use the handheld handle of the middle-layer inner cylinder to adjust the posture of the block-shaped elbow a of the middle-layer inner cylinder so that it can pass through the gap between the stay cable duct and the in-line damper, and then start the control valve of the middle-layer inner cylinder corresponding to the hydraulic power system to extend the middle-layer inner cylinder until the block-shaped elbow a extends to the inner end face D-1 of the in-line damper at the tower end;

[0026] Step 3: Use the handheld handle of the middle-layer inner cylinder to rotate the middle-layer inner cylinder by 90 degrees so that the block-shaped elbow a is in a hooked posture and hooks the inner end face D-1 of the in-line damper;

[0027] Step 4: Start the control valve of the core layer piston rod of the hydraulic power system to extend the core layer piston rod until the block elbow b of the core layer piston rod is in close contact with the outer end face D-2 of the built-in damper. At this time, the block elbow a and the block elbow b clamp the built-in damper;

[0028] Step 5: Reverse-start the control valve of the middle layer inner cylinder to retract the middle layer inner cylinder, drive the built-in damper to extend out of the cable duct, close the control valve of the core layer piston rod, and make it retract under the action of the spring system to cancel the clamping state of the block elbow b on the built-in damper, realizing the removal of the built-in damper;

[0029] Step 6: Pre-install the built-in damper on the stay cable, and the inner end face D-1 of the built-in damper and the block elbow a of the middle layer inner cylinder are basically in close contact. Fine-tune the middle layer inner cylinder so that the block elbow a extends to be in close contact with the inner end face of the built-in damper at the tower end, showing a hooked state;

[0030] Step 7: Start the control valve of the core layer piston rod of the hydraulic power system to extend the core layer piston rod until the block elbow b of the core layer piston rod is in close contact with the outer end face D-2 of the built-in damper. At this time, the block elbow a and the block elbow b clamp the built-in damper;

[0031] Step 8: Start the control valve corresponding to the middle layer inner cylinder of the hydraulic power system to extend the middle layer inner cylinder and drive the built-in damper into the predetermined position of the cable duct;

[0032] Step 9: Tighten the fastening nut of the built-in damper so that the built-in damper is tightly clamped between the stay cable duct and the cable body without falling;

[0033] Step 10: Cooperate to start the control valve of the middle layer inner cylinder, the control valve of the core layer piston rod and the handheld handle, loosen the block elbow a and the block elbow b, and rotate the middle layer inner cylinder by 90 degrees to retract the middle layer inner cylinder and the block elbow a from the gap between the built-in damper and the cable duct, and remove this set of devices.

[0034] The present invention has at least the following beneficial effects:

[0035] (1) By inventing a replacement device with a middle layer inner cylinder, a core layer piston rod, and a hydraulic power system, rapid and reliable clamping and positioning of the built-in damper are realized, and the operation is simple and reliable.

[0036] (2) The removal and installation of the built-in damper are carried out by the device of the present application, which has the advantages of process-based operation, high standardization degree, controllable quality and high-altitude operation safety, and avoids the hidden dangers of non-standard operation, large quality and safety risks caused by traditional manual operation.

[0037] (3) This set of device is fixedly installed on the cable body of the stay cable through a hoop-shaped base and can be removed after installation, without causing damage to the permanent main structures such as the stay cable or the main tower.

[0038] Other advantages, objectives and features of the present invention will be partly reflected by the following description and partly understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 : General structural schematic diagram of the replacement device for the built-in damper at the tower end of the parallel wire stay cable;

[0040] Figure 2 : Detail structural schematic diagram of the relative relationship between the middle inner cylinder and the core layer piston rod;

[0041] Figure 3 : Schematic diagram of the connection and working principle of each component of the oil cylinder system;

[0042] Figure 4 : Schematic diagram of the operation of Step 1 of the method for replacing the built-in damper at the tower end of the parallel wire stay cable;

[0043] Figure 5 : Schematic diagram of the operation of Step 2 of the method for replacing the built-in damper at the tower end of the parallel wire stay cable;

[0044] Figure 6 : Schematic diagram of the operation of Step 3 of the method for replacing the built-in damper at the tower end of the parallel wire stay cable;

[0045] Figure 7 : Schematic diagram of the operation of Step 4 of the method for replacing the built-in damper at the tower end of the parallel wire stay cable;

[0046] Figure 8 : Schematic diagram of the operation of Step 5 of the method for replacing the built-in damper at the tower end of the parallel wire stay cable;

[0047] Figure 9 : Schematic diagram of the operation of Steps 6 and 7 of the method for replacing the built-in damper at the tower end of the parallel wire stay cable;

[0048] Figure 10 : Schematic diagram of the operation of Step 8 of the method for replacing the built-in damper at the tower end of the parallel wire stay cable;

[0049] Figure 11 : Rear side of Step 9 of the method for replacing the built-in damper at the tower end of the parallel wire stay cable;

[0050] Figure 12 : Cross-sectional schematic diagram of Step 9 of the method for replacing the built-in damper at the tower end of the parallel wire stay cable;

[0051] Figure 13: Schematic diagram of the operation steps of the replacement method for the built-in damper at the tower end of the parallel wire stay cable.

[0052] Explanation of the reference numerals in the drawings: 1. Cylinder barrel; 2. Hoop-shaped base; 3. Middle inner cylinder; 3-1. Block-shaped elbow a; 3-2. Handheld handle; 3-3. Waist-shaped long groove; 4. Spring system; 5. Core layer piston rod; 5-1. Block-shaped elbow b; 6-1. Oil inlet / outlet A; 6-2. Oil inlet / outlet B; 6-3. Oil inlet / outlet C; 6-4. Oil inlet / outlet D; 6-5. Oil inlet / outlet E; 7. Hydraulic pump device; 8. Oil tank; 9. Oil pipe; 10. Control system; 11. Stay cable; 12. Bolt B; 13. Cable duct; 14. Built-in damper; 14-1. Inner end face D-1 of the built-in damper; 14-2. Outer end face D-2 of the built-in damper; 14-3. Damper fastening nut D-3. Detailed implementation manners

[0053] The following further elaborates on the present invention in conjunction with embodiments, so that those skilled in the art can implement it with reference to the description in the specification.

[0054] It should be noted that the experimental methods described in the following implementation plans are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present invention, the orientation or positional relationship indicated by the terms "horizontal", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0055] Embodiment 1

[0056] As Figures 1 - 2 shown, the present invention provides a replacement device for the built-in damper 14 at the tower end of the parallel wire stay cable 11, including:

[0057] Two sets of clamping systems, and the clamping system includes: a cylinder barrel 1, a middle inner cylinder 3 with a piston, a spring system 4, a core layer piston rod 5 with a piston, and a hydraulic power system; the middle inner cylinder 3 is sleeved inside the cylinder barrel 1 and both ends extend out of the cylinder barrel 1, the piston of the middle inner cylinder 3 divides the cylinder barrel 1 into two independent oil cavities, the core layer piston rod 5 is sleeved inside the middle inner cylinder 3, and the core layer piston rod 5 divides the middle inner cylinder 3 into two independent chambers;

[0058] A fixed seat for fixing the relative positions between the cylinder barrels 1;

[0059] Among them, the middle inner cylinder 3 is a hollow tubular structure. At one end of the middle inner cylinder 3, a block-shaped elbow a 3-1 is fixedly arranged, and at the other end, a hand-held handle 3-2 is fixedly arranged. An oil inlet and outlet is provided at the other end. A spring system 4 is connected between one end inside the middle inner cylinder 3 and the core layer piston rod 5. The end of the core layer piston rod 5 is in close contact with the spring system 4 and makes the spring bear a certain pressure. The core layer piston rod 5 has a block-shaped elbow b 5-1, and the bent part of the block-shaped elbow b 5-1 extends out of the middle inner cylinder 3. An oval long slot 3-3 is provided on the middle inner cylinder 3, allowing the block-shaped elbow of the core layer piston rod 5 to slide along the long slot.

[0060] Both ends of the cylinder barrel 1 are provided with oil inlet and outlet ports. The forward or backward movement of the middle inner cylinder 3 and the forward movement of the core layer piston rod 5 are controlled by a hydraulic power system.

[0061] In the above technical solution, the middle inner cylinder 3 can move bidirectionally and can also be manually rotated by using the hand-held handle 3-2; relative to the core layer piston cylinder, the middle inner cylinder 3 is equivalent to the cylinder barrel 1. An oil pipe 9 is connected to the oil inlet and outlet at the end of the middle inner cylinder 3. The forward movement of the core layer piston rod 5 can be achieved through the hydraulic power system. When the hydraulic power system stops supplying oil, the core layer piston cylinder can retreat by the action of the spring system 4.

[0062] This technical solution can also include the following technical details to better achieve the technical effect: The fixed seats are two sets of hoop-shaped bases 2, which are respectively fixed at both ends of the cylinder barrel 1.

[0063] This technical solution can also include the following technical details to better achieve the technical effect: As Figure 3 shown, the movement and control of the components of the cylinder barrel 1, the middle inner cylinder 3, and the core layer piston rod 5 are realized by the supporting hydraulic power system. The hydraulic power system includes a fuel tank 8 for oil reserve, a hydraulic pump device 7 (including an oil pump and a motor) for providing the original power, an oil pipe 9 connecting the fuel tank 8 and the oil inlet and outlet ports (the middle inner cylinder 3 and the cylinder barrel), and a control system 10 installed on the fuel tank 8 to control the oil circuit.

[0064] In the above technical solution, the connection and working principle of the components of the hydraulic power system mainly include the following key points:

[0065] Key point 1: The hydraulic pump device 7 is connected to the control system 10 through the oil pipe 9, and the control system 10 is installed on the fuel tank 8; the control system 10 is respectively connected to the oil inlet and outlet ports outside the cylinder barrel 1 and the oil inlet and outlet ports of the middle inner cylinder 3 through the oil pipe 9.

[0066] Key Point 2: The oil inlet and outlet ports outside the cylinder barrel 1 are used for oil inlet and outlet through the control system 10 to control the forward and backward movement of the middle-layer inner cylinder 3; the oil inlet and outlet ports of the middle-layer inner cylinder 3 are used for oil inlet through the control system 10 to control the forward movement of the core-layer piston rod 5, and the spring system 4 is used when it moves backward.

[0067] Key Point 3: In this embodiment, the oil inlet and outlet ports of the cylinder barrel 1 include oil inlet and outlet port A6-1, oil inlet and outlet port B6-2, oil inlet and outlet port C6-3, and oil inlet and outlet port D6-4. The oil inlet and outlet port E6-5 of the middle-layer inner cylinder 3. When the middle-layer inner cylinder 3 moves forward, oil inlet and outlet port B6-2 and oil inlet and outlet port D6-4 are for oil inlet, and oil inlet and outlet port A6-1 and oil inlet and outlet port C6-3 are for oil outlet, and vice versa when it moves backward; when the core-layer piston rod 5 moves forward, the oil inlet and outlet port E6-5 of the middle-layer inner cylinder 3 is for oil inlet, and oil inlet stops when it moves backward.

[0068] Embodiment 2

[0069] A method for removing the built-in damper 14 by using the replacement device includes the following steps:

[0070] Step 1. As Figure 4 shown, connect the hydraulic power system with the oil inlet and outlet ports of the cylinder barrel 1 and the oil inlet and outlet ports of the middle-layer inner cylinder 3 through pipelines according to the general power connection method of hydraulic cylinders, and tightly hold and connect the fixing seat (the hoop-shaped base 2 in this embodiment) with the cable body through bolt B12 at an appropriate position of the stay cable 11;

[0071] Step 2. As Figure 5 shown, use the handheld handle 3-2 of the middle-layer inner cylinder 3 to adjust the posture of the block-shaped elbow a3-1 of the middle-layer inner cylinder 3 so that it can pass through the gap between the stay cable 11, the cable duct 13 and the built-in damper 14, and then start the control valve corresponding to the middle-layer inner cylinder 3 of the hydraulic power system to extend the middle-layer inner cylinder 3 until the block-shaped elbow a3-1 extends to the inner end face D-1 14-1 of the built-in damper at the tower end;

[0072] Step 3. As Figure 6 shown, use the handheld handle 3-2 of the middle-layer inner cylinder 3 to rotate the middle-layer inner cylinder 3 by 90 degrees so that the block-shaped elbow a3-1 is in a hooked posture and hooks the inner end face D-1 14-1 of the built-in damper 14;

[0073] Step 4. As Figure 7 shown, start the control valve corresponding to the core-layer piston rod 5 of the hydraulic power system to extend the core-layer piston rod 5 until the block-shaped elbow b5-1 of the core-layer piston rod 5 is in close contact with the outer end face D-2 14-2 of the built-in damper 14. At this time, the block-shaped elbow a3-1 and the block-shaped elbow b5-1 clamp the built-in damper 14;

[0074] Step 5. As Figure 8As shown, reverse-start the control valve of the middle-layer inner cylinder 3 (at this time, the control valve of the core-layer piston rod 5 is in a self-locking state), retract the middle-layer inner cylinder 3, drive the built-in damper 14 to extend out of the cable duct 13, close the control valve of the core-layer piston rod 5, and make it retract under the action of the spring system 4 to cancel the clamping state of the built-in damper 14 by the block elbow b5-1, so as to realize the removal of the built-in damper 14.

[0075] Embodiment 3

[0076] A method for installing the built-in damper 14 by using the replacement device includes the following steps:

[0077] Step 1: As Figure 9 shown, pre-install the built-in damper 14 (new damper or the original old damper that has completed repair treatment) on the stay cable 11, and the inner end face D-1 of the built-in damper 14 and the block elbow a 3-1 of the middle-layer inner cylinder 3 are basically in close contact. Fine-tune the middle-layer inner cylinder 3 so that the block elbow a 3-1 extends to the inner end face of the built-in damper 14 at the tower end and is in close contact, showing a hooked state;

[0078] Step 2: As Figure 10 shown, start the control valve of the core-layer piston rod 5 corresponding to the hydraulic power system, so that the core-layer piston rod 5 extends until the block elbow b 5-1 of the core-layer piston rod 5 is in close contact with the outer end face D-2 14-2 of the built-in damper. At this time, the block elbow a 3-1 and the block elbow b 5-1 clamp the built-in damper 14 in a clamping state;

[0079] Step 3: As Figures 11 - 12 shown, start the control valve corresponding to the middle-layer inner cylinder 3 of the hydraulic power system (at this time, the control valve of the core-layer piston rod 5 is in a self-locking state), extend the middle-layer inner cylinder 3, and drive the built-in damper 14 into the predetermined position of the cable duct 13;

[0080] Step 4: As Figure 13 shown, tighten the fastening nut D-3 14-3 of the built-in damper 14 so that the built-in damper 14 is tightly clamped between the cable duct 13 of the stay cable 11 and the cable body and does not fall off;

[0081] Step 5: As Figure 13 shown, cooperate with starting the control valve of the middle-layer inner cylinder 3, the control valve of the core-layer piston rod 5 and the handheld handle 3-2, loosen the block elbow a3-1 and the block elbow b5-1, and rotate the middle-layer inner cylinder 3 by 90 degrees, so that the middle-layer inner cylinder 3 and the block elbow a3-1 retract from the gap between the built-in damper 14 and the cable duct 13, and remove this set of devices.

[0082] Embodiment 4

[0083] A method for replacing the built-in damper 14 by using the replacement device, comprising the following steps:

[0084] Step 1: Connect the hydraulic power system to the oil inlet and outlet of the cylinder barrel 1 and the oil inlet and outlet of the middle inner cylinder 3 through pipelines, and tightly fasten and connect the fixing seat (the hoop-shaped base 2 in this embodiment) to the cable body through the bolt B12 at an appropriate position of the stay cable 11.

[0085] Step 2: Use the handheld handle 3-2 of the middle inner cylinder 3 to adjust the posture of the block-shaped elbow a3-1 of the middle inner cylinder 3 so that it can pass through the gap between the cable duct 13 of the stay cable 11 and the built-in damper 14, and then start the control valve corresponding to the middle inner cylinder 3 of the hydraulic power system to extend the middle inner cylinder 3 until the block-shaped elbow a3-1 extends to the inner end face D-1 of the built-in damper 14 at the tower end.

[0086] Step 3: Use the handheld handle 3-2 of the middle inner cylinder 3 to rotate the middle inner cylinder 3 by 90 degrees so that the block-shaped elbow a3-1 is in a hooked posture and hooks the inner end face D-1 of the built-in damper 14.

[0087] Step 4: Start the control valve corresponding to the core layer piston rod 5 of the hydraulic power system to extend the core layer piston rod 5 until the block-shaped elbow b5-1 of the core layer piston rod 5 is in close contact with the outer end face D-2 of the built-in damper 14. At this time, the block-shaped elbow a3-1 and the block-shaped elbow b5-1 clamp the built-in damper 14.

[0088] Step 5: Reverse-start the control valve of the middle inner cylinder 3 (at this time, the control valve of the core layer piston rod 5 is in a self-locking state), retract the middle inner cylinder 3, drive the built-in damper 14 out of the cable duct 13, close the control valve of the core layer piston rod 5, and make it retract under the action of the spring system 4 to cancel the clamping state of the block-shaped elbow b5-1 on the built-in damper 14, so as to take out the built-in damper 14.

[0089] Step 6: Pre-install the built-in damper 14 (new damper or the original old damper that has completed maintenance treatment) on the stay cable 11, and the inner end face D-1 of the built-in damper 14 and the block-shaped elbow a3-1 of the middle inner cylinder 3 are basically in close contact. Fine-tune the middle inner cylinder 3 so that the block-shaped elbow a3-1 extends to the inner end face of the built-in damper 14 at the tower end and is in close contact, showing a hooked state.

[0090] Step 7: Start the control valve corresponding to the core layer piston rod 5 of the hydraulic power system to extend the core layer piston rod 5 until the block-shaped elbow b5-1 of the core layer piston rod 5 is in close contact with the outer end face D-2 of the built-in damper 14. At this time, the block-shaped elbow a3-1 and the block-shaped elbow b5-1 clamp the built-in damper 14.

[0091] Step 8: Start the control valve of the middle-layer inner cylinder 3 of the hydraulic power system (at this time, the control valve of the core-layer piston rod 5 is in a self-locking state), extend the middle-layer inner cylinder 3, and drive the built-in damper 14 into the predetermined position of the cable duct 13;

[0092] Step 9: Tighten the fastening nut D-3 of the built-in damper 14 so that the built-in damper 14 is tightly clamped between the cable duct 13 of the stay cable 11 and the cable body without falling;

[0093] Step 10: Cooperate to start the control valve of the middle-layer inner cylinder 3, the control valve of the core-layer piston rod 5 and the handheld handle 3-2, loosen the block elbow a3-1 and the block elbow b5-1, and rotate the middle-layer inner cylinder 3 by 90 degrees so that the middle-layer inner cylinder 3 and the block elbow a3-1 retract from the gap between the built-in damper 14 and the cable duct 13, and remove this set of devices.

[0094] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the embodiments shown and described here.

Claims

1. A method for removing an in - built damper by using a replacement device, characterized in that, the replacement device includes: at least two sets of clamping systems, and the clamping system includes: a cylinder barrel, a middle - layer inner cylinder with a piston, a spring system, a core - layer piston rod with a piston, and a hydraulic power system; the middle - layer inner cylinder is sleeved in the cylinder barrel and both ends extend out of the cylinder barrel, and the core - layer piston rod is sleeved in the middle - layer inner cylinder; a fixed seat for fixing the relative positions between the cylinder barrels; wherein, the middle - layer inner cylinder is a hollow tubular structure, a block - shaped elbow a is fixedly arranged at one end of the middle - layer inner cylinder, a hand - held handle is fixedly arranged at the other end, and an oil inlet / outlet is arranged at the other end. A spring system is connected between one end inside the middle - layer inner cylinder and the core - layer piston rod. The end of the core - layer piston rod is in close contact with the spring system and makes the spring bear a certain pressure. The core - layer piston rod has a block - shaped elbow b, and the bent part of the block - shaped elbow b extends out of the middle - layer inner cylinder. A long groove is arranged on the middle - layer inner cylinder, and the block - shaped elbow of the core - layer piston rod can slide along the long groove; both ends of the cylinder barrel are provided with oil inlet / outlets, and the hydraulic power system is used to control the forward or backward movement of the middle - layer inner cylinder and the forward movement of the core - layer piston rod; the removal method includes the following steps: Step 1: Connect the hydraulic power system with the oil inlet / outlets of the cylinder barrel and the oil inlet / outlets of the middle - layer inner cylinder through pipelines, and tightly hold and connect the fixed seat with the cable body at an appropriate position of the stay cable; Step 2: Use the hand - held handle of the middle - layer inner cylinder to adjust the posture of the block - shaped elbow a of the middle - layer inner cylinder so that it can pass through the gap between the stay - cable duct and the in - built damper, and then start the control valve of the middle - layer inner cylinder corresponding to the hydraulic power system to extend the middle - layer inner cylinder until the block - shaped elbow a extends to the inner end face D - 1 of the in - built damper at the tower end; Step 3: Use the hand - held handle of the middle - layer inner cylinder to rotate the middle - layer inner cylinder by 90 degrees so that the block - shaped elbow a is in a hooked posture to hook the inner end face D - 1 of the in - built damper; Step 4: Start the control valve of the core - layer piston rod corresponding to the hydraulic power system to extend the core - layer piston rod until the block - shaped elbow b of the core - layer piston rod is in close contact with the outer end face D - 2 of the in - built damper. At this time, the block - shaped elbow a and the block - shaped elbow b clamp the in - built damper; Step 5: Reverse - start the control valve of the middle - layer inner cylinder to retract the middle - layer inner cylinder, drive the in - built damper to extend out of the duct, and close the control valve of the core - layer piston rod to make it retract under the action of the spring system to cancel the clamping state of the block - shaped elbow b on the in - built damper, thus realizing the removal of the in - built damper.

2. A method for installing an in - built damper by using a replacement device, characterized in that, the replacement device includes: at least two sets of clamping systems, and the clamping system includes: a cylinder barrel, a middle - layer inner cylinder with a piston, a spring system, a core - layer piston rod with a piston, and a hydraulic power system; the middle - layer inner cylinder is sleeved in the cylinder barrel and both ends extend out of the cylinder barrel, and the core - layer piston rod is sleeved in the middle - layer inner cylinder; a fixed seat for fixing the relative positions between the cylinder barrels; Wherein, the middle inner cylinder is a hollow tubular structure. A block-shaped elbow a is fixedly arranged at one end of the middle inner cylinder, and a hand-held handle is fixedly arranged at the other end. An oil inlet / outlet is provided at the other end. A spring system is connected between one end inside the middle inner cylinder and the core layer piston rod. The end of the core layer piston rod is in close contact with the spring system and makes the spring bear a certain pressure. The core layer piston rod has a block-shaped elbow b, and the bent part of the block-shaped elbow b extends out of the middle inner cylinder. A long groove is provided on the middle inner cylinder for the block-shaped elbow of the core layer piston rod to slide along the long groove; Oil inlet / outlets are provided at both ends of the cylinder barrel. The forward or backward movement of the middle inner cylinder and the forward movement of the core layer piston rod are controlled by a hydraulic power system; The installation method includes the following steps: Step 1: Pre-install the built-in damper on the stay cable, and the inner end face D-1 of the built-in damper and the block-shaped elbow a of the middle inner cylinder are basically in close contact. Fine-tune the middle inner cylinder so that the block-shaped elbow a extends to be in close contact with the inner end face of the built-in damper at the tower end, showing a hooked state; Step 2: Start the control valve of the core layer piston rod corresponding to the hydraulic power system to extend the core layer piston rod until the block-shaped elbow b of the core layer piston rod is in close contact with the outer end face D-2 of the built-in damper. At this time, the block-shaped elbow a and the block-shaped elbow b clamp the built-in damper; Step 3: Start the control valve of the middle inner cylinder corresponding to the hydraulic power system to extend the middle inner cylinder, driving the built-in damper into the predetermined position of the cable duct; Step 4: Tighten the fastening nut of the built-in damper so that the built-in damper is tightly clamped between the stay cable duct and the cable body without falling; Step 5: Cooperate to start the control valve of the middle inner cylinder, the control valve of the core layer piston rod and the hand-held handle, loosen the block-shaped elbow a and the block-shaped elbow b, and rotate the middle inner cylinder by 90 degrees to retract the middle inner cylinder and the block-shaped elbow a from the gap between the built-in damper and the cable duct, and remove this set of devices.

3. A method for replacing a built-in damper by using a replacement device, characterized in that, The replacement device includes: At least two groups of clamping systems. The clamping system includes: a cylinder barrel, a middle inner cylinder with a piston, a spring system, a core layer piston rod with a piston, and a hydraulic power system; the middle inner cylinder is sleeved inside the cylinder barrel and both ends extend out of the cylinder barrel, and the core layer piston rod is sleeved inside the middle inner cylinder; A fixed seat for fixing the relative positions between the cylinder barrels; Wherein, the middle inner cylinder is a hollow tubular structure. A block-shaped elbow a is fixedly arranged at one end of the middle inner cylinder, and a hand-held handle is fixedly arranged at the other end. An oil inlet / outlet is provided at the other end. A spring system is connected between one end inside the middle inner cylinder and the core layer piston rod. The end of the core layer piston rod is in close contact with the spring system and makes the spring bear a certain pressure. The core layer piston rod has a block-shaped elbow b, and the bent part of the block-shaped elbow b extends out of the middle inner cylinder. A long groove is provided on the middle inner cylinder for the block-shaped elbow of the core layer piston rod to slide along the long groove; Oil inlet / outlets are provided at both ends of the cylinder barrel. The forward or backward movement of the middle inner cylinder and the forward movement of the core layer piston rod are controlled by a hydraulic power system; The replacement method includes the following steps: Step 1: Connect the hydraulic power system to the oil inlet and outlet of the cylinder barrel and the oil inlet and outlet of the middle inner cylinder through pipelines, and tightly fasten and connect the fixing seat to the cable body at an appropriate position of the stay cable; Step 2: Use the handheld handle of the middle inner cylinder to adjust the posture of the block elbow a of the middle inner cylinder so that it can pass through the gap between the stay cable duct and the built-in damper, and then start the control valve of the hydraulic power system corresponding to the middle inner cylinder to extend the middle inner cylinder until the block elbow a extends to the inner end face D-1 of the built-in damper at the tower end; Step 3: Use the handheld handle of the middle inner cylinder to rotate the middle inner cylinder by 90 degrees so that the block elbow a is in a hooked posture and hooks the inner end face D-1 of the built-in damper; Step 4: Start the control valve of the core layer piston rod of the hydraulic power system to extend the core layer piston rod until the block elbow b of the core layer piston rod is in close contact with the outer end face D-2 of the built-in damper. At this time, the block elbow a and the block elbow b clamp the built-in damper; Step 5: Reverse-start the control valve of the middle inner cylinder to retract the middle inner cylinder, drive the built-in damper out of the duct, and close the control valve of the core layer piston rod to retract it under the action of the spring system to cancel the clamping state of the block elbow b on the built-in damper, realizing the removal of the built-in damper; Step 6: Pre-install the built-in damper on the stay cable, and the inner end face D-1 of the built-in damper and the block elbow a of the middle inner cylinder are basically in close contact. Fine-tune the middle inner cylinder so that the block elbow a extends to be in close contact with the inner end face of the built-in damper at the tower end, showing a hooked state; Step 7: Start the control valve of the core layer piston rod of the hydraulic power system to extend the core layer piston rod until the block elbow b of the core layer piston rod is in close contact with the outer end face D-2 of the built-in damper. At this time, the block elbow a and the block elbow b clamp the built-in damper; Step 8: Start the control valve of the middle inner cylinder of the hydraulic power system to extend the middle inner cylinder and drive the built-in damper into the predetermined position of the duct; Step 9: Tighten the fastening nut of the built-in damper so that the built-in damper is tightly clamped between the stay cable duct and the cable body and does not fall off; Step 10: Cooperate to start the control valve of the middle inner cylinder, the control valve of the core layer piston rod and the handheld handle, loosen the block elbow a and the block elbow b, and rotate the middle inner cylinder by 90 degrees to retract the middle inner cylinder and the block elbow a from the gap between the built-in damper and the duct, and remove this set of devices.

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