Novel nonlinear damping device for stay cable

Abstract

The utility model discloses a novel nonlinear damping device of a stay cable, which comprises an inner ring, an outer ring and a damping rope, the inner ring is used for penetrating and sleeving the stay cable, the outer ring is sleeved outside the inner ring, a gap is arranged between the outer ring and the inner ring, the outer ring is connected with the inner ring through the damping rope, and the damping rope is arranged in the gap. And the damping rope is alternately wound between the inner ring and the outer ring. The structural design and the part processing are simple, the assembly is convenient, the installation and the maintenance are convenient, and an external supporting structure is not needed.

Description

Technical Field

[0001] The utility model relates to the field of prestressing, in particular to a novel nonlinear damping device for a stay cable. Background Art

[0002] The vibration of the cable of a cable-stayed bridge can easily cause fatigue damage to the cable itself or the anchoring system, affecting the service life and safety of the cable and its structure. Therefore, it is very necessary to take cable vibration control measures for large-span cable-stayed bridges. At present, the damping devices used to control the vibration of the cable in engineering include viscous dampers, viscous shear dampers, magnetorheological dampers, viscoelastic dampers, rubber shock absorbers, etc. However, the damping with fluid materials as the medium adopts the structural design of hydraulic seals, which has the risk of aging and leakage failure; polymer materials or rubber materials damping, although solving the leakage problem of hydraulic seal structure, still have the problem of reduced shock absorption effect after aging of polymer materials or rubber; At present, all-metal, non-sealed structure, durability and significant shock absorption effect of wire rope damper began to be quoted, but due to the lack of engineering application experience, its structural design and installation are more complicated, the convenience of construction is poor and the cost is high, which is not conducive to the large-scale promotion and application of engineering projects. Summary of the invention

[0003] The utility model aims to provide a novel nonlinear damping device for a stay cable, which has simple structural design and parts processing, convenient assembly, installation and maintenance, and does not require an external supporting structure.

[0004] A novel nonlinear damping device for a cable-stayed cable comprises an inner ring, an outer ring and a damping rope, wherein the inner ring is used for threading the cable, the outer ring is sleeved outside the inner ring, a gap is provided between the outer ring and the inner ring, the outer ring is connected to the inner ring through the damping rope, and the damping rope is alternately wound between the inner ring and the outer ring.

[0005] In one of the embodiments, the inner ring includes an inner fixed ring and an inner pressure ring, the inner pressure ring is installed on the outer circumference of the inner fixed ring, and the damping rope is clamped between the inner pressure ring and the inner fixed ring.

[0006] In one embodiment, the inner ring includes at least two half rings, and the half rings are combined to form the inner ring.

[0007] In one of the embodiments, the half ring is provided with an ear plate and a half ring connector, the ear plate is provided with ear holes, the ear holes of two adjacent half rings correspond to each other, and the half ring connector passes through two corresponding ear holes to connect the two adjacent half rings.

[0008] In one of the embodiments, the outer circumference of the inner fixed ring is provided with a plurality of first grooves, the inner circumference of the inner pressure ring is provided with a plurality of corresponding second grooves, and the damping rope is embedded in a pair of corresponding first grooves and second grooves.

[0009] In one of the embodiments, the outer ring includes an outer fixed ring and an outer pressure ring, the outer pressure ring is installed on the inner circumference of the outer fixed ring, and the damping rope is clamped between the outer pressure ring and the outer fixed ring.

[0010] In one embodiment, a first flange is disposed at the first end of the outer fixing ring, or a second flange is disposed at the second end of the outer fixing ring, and the first flange or the second flange is used to be connected to a flange of the cable guide tube.

[0011] In one of the embodiments, the outer circumference of the outer pressure ring is provided with a plurality of third grooves, the inner circumference of the outer fixing ring is provided with a plurality of corresponding fourth grooves, and the damping rope is embedded in a pair of corresponding third grooves and fourth grooves.

[0012] In one embodiment, the inner ring, the damping rope, and the outer pressure ring are accommodated in the outer fixing ring.

[0013] In one embodiment, the damping rope is wound in a spiral shape between the inner ring and the outer ring.

[0014] Compared with the prior art, the novel nonlinear damping device for the inclined cable of the utility model has the following advantages:

[0015] 1. The damping device of the utility model has a damping rope that supports the outer ring outside the inner ring, which can provide vibration reduction in multiple dimensions. The damping rope is installed on the inclined cable through an outer fixing ring and bolts in a spiral structure, which can suppress the swing of the inclined cable in multiple directions. When the inclined cable vibrates due to wind, rain, traffic load or other conditions, the damping rope (wire rope) achieves vibration reduction function by consuming energy to attenuate vibration through the yielding of the steel wire and the slippage, friction and backlog between strands and wires.

[0016] 2. The outer ring, inner ring, damping rope and other units of the damping device of the utility model are relatively independent, can be connected by bolts, can be freely disassembled, and are convenient for later maintenance and replacement.

[0017] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is an axial cross-sectional schematic diagram of the damping device of the embodiment of the utility model installed on the cable guide tube;

[0020] Figure 2 It is a left-side structural schematic diagram of the damping device of an embodiment of the utility model;

[0021] Figure 3 It is a left-side structural schematic diagram of the inner ring in the embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the top view of the inner ring in the embodiment of the utility model.

[0023] Among them, 10, inner ring, 101, ear plate, 102, ear hole, 103, half ring connector, 104, half ring, 11, inner fixing ring, 111, first groove, 12, inner pressure ring, 121, second groove, 122, inner pressure plate, 20, outer ring, 21, outer fixing ring, 211, first flange, 212, second flange, 22, outer pressure ring, 30, damping rope, 40, cable, 50, cable guide tube, 51, third flange, 52, fourth flange. DETAILED DESCRIPTION

[0024] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1-4 As shown, the novel nonlinear damping device of the steel wire rope for the inclined cable 40 comprises: an inner ring 10, an outer ring 20, and a damping rope 30. The inner ring 10 is used to put the cable 40, and the outer ring 20 is sleeved outside the inner ring 10. A gap is provided between the outer ring 20 and the inner ring 10. The outer ring 20 is connected to the inner ring 10 through the damping rope 30, and the damping rope 30 is alternately wound between the inner ring 10 and the outer ring 20. The outer ring 20 is used to be fixed on the structure, and the inner ring 10 is used to trap the cable 40. The outer ring 20 is supported outside the inner ring 10 through the damping rope 30. When the cable 40 vibrates, the damping rope 30 plays a role in shock absorption and vibration suppression. The damping rope 30 refers to a slender object that can play a damping role, and preferably a material with low cost, waterproof, anti-aging and anti-corrosion. In this embodiment, a steel wire rope is used as the damping rope 30.

[0028] The inner ring 10 includes an inner fixed ring 11 and an inner pressure ring 12. The inner pressure ring 12 is installed on the outer peripheral surface of the inner fixed ring 11, and the damping rope 30 is clamped between the inner pressure ring 12 and the inner fixed ring 11. The inner pressure ring 12 and the inner fixed ring 11 are provided with corresponding holes, and the inner pressure ring 12 is installed on the inner fixed ring 11 by bolts or screws. The inner fixed ring 11 is used to snare the cable 40. The inner fixed ring 11 is installed on the cable 40, and then the damping rope 30 is clamped on the inner fixed ring 11 by the inner pressure ring 12, which makes loading and unloading simple and quick. Preferably, the inner pressure ring 12 is composed of two or more inner pressure sheets 122, which is more convenient to install in the spiral damping rope 30.

[0029] like Figure 3 As shown, the inner ring 10 includes at least two half rings 104, and the half rings 104 are enclosed and assembled to form the inner ring 10. The half ring 104 is provided with an ear plate 101 and a half ring connector 103. The ear plate 101 is provided with an ear hole 102. The ear holes 102 of two adjacent half rings 104 correspond to each other. The half ring connector 103 passes through two corresponding ear holes 102 to connect the two adjacent half rings 104. In this embodiment, the end face of the half ring 104 is provided with an ear plate 101, but it is not limited to this embodiment, and the ear plate 101 can also be set at other positions. During installation, the half ring 104 is looped outside the cable 40, the ear plate 101 is aligned, the ear hole 102 is aligned, and the two half rings 104 are connected by the half ring connector 103 passing through the corresponding ear hole 102, which is simple to load and unload.

[0030] The outer ring 20 includes an outer fixing ring 21 and an outer pressure ring 22. The outer pressure ring 22 is installed on the inner peripheral surface of the outer fixing ring, and the damping rope 30 is clamped between the outer pressure ring 22 and the outer fixing ring 21. The damping rope 30 is clamped on the outer fixing ring 21 by the outer pressure ring 22, and the loading and unloading is simple and fast. Preferably, the outer pressure ring 22 is composed of two or more outer pressure pieces, which is more convenient to install in the spiral damping rope 30.

[0031] The outer circumference of the inner fixed ring 11 is provided with a plurality of first grooves 111, the inner circumference of the inner pressure ring 12 is provided with a plurality of corresponding second grooves 121, and the damping rope 30 is embedded in a pair of corresponding first grooves 111 and second grooves 121. The outer circumference of the outer pressure ring 22 is provided with a plurality of third grooves, the inner circumference of the outer fixed ring 21 is provided with a plurality of corresponding fourth grooves, and the damping rope 30 is embedded in a pair of corresponding third grooves and fourth grooves. The damping rope 30 is installed in the form of grooves to avoid flattening or damaging the damping rope 30, and also to increase the installation area and friction, thereby preventing the damping rope 30 from shifting.

[0032] In order to obtain a better vibration reduction effect and more convenient installation, the utility model uses a steel wire rope as the damping rope 30, and the damping rope 30 is alternately wound between the inner ring 10 and the outer ring 20 in a spiral shape. The damping rope 30 is stretched and has good elasticity, avoiding damage to the damping rope 30 due to too sharp bending angles. The inner pressure ring 12 and the outer pressure ring 22 are inserted into the rings for installation. However, it is not limited to this embodiment, and other winding forms can also be used as long as they can play a damping role.

[0033] like Figure 1 As shown, the inner ring 10, the damping rope 30, and the outer pressure ring 22 are accommodated in the outer fixing ring 21. The axial width of the outer fixing ring 21 is the widest, and the inner ring 10, the damping rope 30, and the outer pressure ring 22 are all accommodated within the axial width range of the outer fixing ring 21. The outer fixing ring 21 provides support space for each component without the need for additional support structures.

[0034] The first end of the outer fixing ring 21 is provided with a first flange 211, or the second end of the outer fixing ring 21 is provided with a second flange 212, and the first flange 211 or the second flange 212 is used to be flange-connected with the cable guide tube 50. In general engineering structures, a cable guide tube 50 is conventionally provided, and a cable 40 is passed through the cable guide tube 50. The damping device of the utility model is embedded in the cable guide tube 50, and a notch section is opened on the cable guide tube 50. The end surfaces of both ends of the notch section are respectively provided with a third flange 51 and a fourth flange 52. The damping device is inserted into the notch section, and the first flange 211 is installed correspondingly to the third flange 51, and the second flange 212 is installed correspondingly to the fourth flange 52.

[0035] The damping device of the utility model can be used alone or in combination. When multiple damping devices are used in series, the first flange and the second flange of two adjacent damping devices can be connected to each other.

[0036] The beneficial effects of the damping device of the utility model are:

[0037] 1. In the damping device of the utility model, the damping rope 30 supports the outer ring 20 outside the inner ring 10, which can provide vibration reduction effects in multiple dimensions. The damping rope 30 is installed on the inclined cable 40 through the outer fixing ring 21 and bolts in a spiral structure, which can suppress the swing of the inclined cable 40 in multiple directions.

[0038] When the cable 40 vibrates due to wind, rain, traffic load or other conditions, the damping rope 30 (wire rope) in the damping device of the utility model realizes the vibration reduction function by consuming energy and attenuating the vibration through the yielding of the wire and the slippage, friction and compression between strands and wires.

[0039] 2. The outer ring 20, the inner ring 10, the damping rope 30 (wire rope) and other units are relatively independent, can be connected by bolts, can be freely disassembled, and are convenient for later maintenance and replacement.

[0040] 3. Compared with traditional oil-based hydraulic dampers such as viscous dampers, viscous shear dampers and magnetorheological dampers, the damping device of the utility model does not have the problem of damping medium leakage caused by aging of seals.

[0041] 4. Compared with viscoelastic dampers, rubber shock absorbers and other polymer and rubber material dampers, the damping device of the utility model does not have the problem of reduced shock absorption effect caused by rubber aging.

[0042] 5. The damping device of the utility model has the advantages of simple processing of parts, convenient assembly, few installation influencing factors, easy maintenance and replacement, and no need for external supporting structure.

[0043] 6. Preferably, the damping rope 30 of the damping device of the utility model is made of steel wire rope, which is a full stainless steel metal structure with good anti-aging and corrosion resistance, strong environmental adaptability and long service life.

[0044] 7. The damping device of the utility model is annularly installed, and is composed of an inner ring 10, a damping rope 30, and an outer ring 20. The outer ring 20 serves as a supporting structure and does not require an external support frame for installation. It is installed in the cable guide tube 50 at the end of the cable 40, which has a stronger integrity, has little impact on the external structure, and is more beautiful.

[0045] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A novel nonlinear damping device for a stay cable, characterized in that: include: An inner ring, an outer ring and a damping rope, wherein the inner ring is used for threading a pull rope, the outer ring is sleeved outside the inner ring, a gap is provided between the outer ring and the inner ring, the outer ring is connected to the inner ring through the damping rope, and the damping rope is alternately wound between the inner ring and the outer ring.

2. A novel nonlinear damping device for a stay cable according to claim 1, characterized in that: The inner ring comprises an inner fixed ring and an inner pressure ring. The inner pressure ring is installed on the outer peripheral surface of the inner fixed ring. The damping rope is clamped between the inner pressure ring and the inner fixed ring.

3. A novel nonlinear damping device for a stay cable according to claim 2, characterized in that: The inner ring includes at least two half rings, and the half rings are combined to form the inner ring.

4. A novel nonlinear damping device for a stay cable according to claim 3, characterized in that: The semi-ring is provided with an ear plate and a semi-ring connecting piece. The ear plate is provided with an ear hole. The ear holes of two adjacent semi-rings correspond to each other. The semi-ring connecting piece passes through two corresponding ear holes to connect the two adjacent semi-rings.

5. The novel nonlinear damping device for a stay cable according to claim 2 is characterized in that: The outer circumference of the inner fixed ring is provided with a plurality of first grooves, the inner circumference of the inner pressure ring is provided with a plurality of corresponding second grooves, and the damping rope is embedded in a pair of corresponding first grooves and second grooves.

6. The novel nonlinear damping device for a stay cable according to claim 1 is characterized in that: The outer ring comprises an outer fixing ring and an outer pressure ring, the outer pressure ring is mounted on the inner circumferential surface of the outer fixing ring, and the damping rope is clamped between the outer pressure ring and the outer fixing ring.

7. A novel nonlinear damping device for a stay cable according to claim 6, characterized in that: A first flange is disposed at the first end of the outer fixing ring, or a second flange is disposed at the second end of the outer fixing ring. The first flange or the second flange is used to be connected to a flange of the cable guide tube.

8. The novel nonlinear damping device for a stay cable according to claim 6 is characterized in that: The outer circumference of the outer pressure ring is provided with a plurality of third grooves, the inner circumference of the outer fixing ring is provided with a plurality of corresponding fourth grooves, and the damping rope is embedded in a pair of corresponding third grooves and fourth grooves.

9. The novel nonlinear damping device for a stay cable according to claim 6, characterized in that: The inner ring, the damping rope, and the outer pressure ring are accommodated in the outer fixing ring.

10. A novel nonlinear damping device for a stay cable according to any one of claims 1 to 9, characterized in that: The damping rope is wound in a spiral shape between the inner ring and the outer ring.

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