Swing type seismic mitigation and isolation cable saddle

Abstract

The utility model discloses a swing type shock absorption and isolation cable saddle which comprises a saddle body and a base, an installation groove is formed in the base, the saddle body is arranged in the installation groove, a lubricating structure is arranged between the bottom face of the saddle body and the installation groove, and gaps for prolonging the natural vibration period of the saddle body are formed between the saddle body and bosses at the two ends of the installation groove. The saddle body is further connected with the bosses at the two ends of the mounting groove through pre-tightening structures, and the contact face between the lubricating structure and the mounting groove is a swing face of an arc-shaped structure. The saddle body and the base are connected through the pre-tightening structure, when a strong earthquake occurs, the pre-tightening structure is damaged firstly, the saddle body and the base are separated, the saddle body swings and slides along the mounting groove under the action of earthquake energy absorbed by the main cable, part of the earthquake energy is consumed, and the impact of the earthquake energy on the main tower is reduced; the construction cost of the main tower is effectively reduced, and meanwhile the safety of the suspension bridge is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridges, and in particular relates to a swing-type seismic isolation cable saddle. Background Art

[0002] The saddle is a structure specially designed for the suspension cable to bypass the tower top and allow the main cable to change direction smoothly. The saddle is equipped with a cable groove for connecting with the main cable to transfer the pressure from the main cable to the main tower.

[0003] At present, the traditional cable saddle is fixedly connected to the main tower. For example, Chinese invention patent CN114808697A discloses a construction structure system and construction method of a main cable saddle with a large pre-bias. The permanent base is fixed in the central area of ​​the top surface of the main tower. When an earthquake occurs, the main tower can only rely on the deformation to adapt to the energy of the earthquake. As the construction length of the suspension bridge becomes longer and longer, the stiffness requirements for the main tower are also higher and higher, which increases the construction cost of the main tower. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a swinging seismic isolation cable saddle. The saddle body and the base are connected by a pre-tightening structure. When a strong earthquake occurs, the pre-tightening structure is first destroyed to separate the saddle body from the base. The saddle body swings and slides along the installation groove under the action of the seismic energy absorbed by the main cable, which consumes part of the seismic energy, reduces the impact of the seismic energy on the main tower, effectively reduces the construction cost of the main tower, and is beneficial to the safety of the suspension bridge.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A swing type seismic isolation cable saddle, comprising:

[0007] A saddle body, wherein the saddle body is used to fix the main cable;

[0008] A base, the base being connected to the main tower;

[0009] In which, a mounting groove is provided on the base, the saddle body is arranged in the mounting groove, a lubrication structure is provided between the bottom surface of the saddle body and the mounting groove, and a gap for extending the self-vibration period of the saddle body is provided between the saddle body and the bosses at both ends of the mounting groove, the saddle body is also connected to the bosses at both ends of the mounting groove through a pre-tightening structure, and the contact surface between the lubrication structure and the mounting groove is a swinging surface of an arc structure.

[0010] In one embodiment, the pre-tightening structure includes a stopper disposed on the side wall of the saddle body, the stopper extends to above the boss, and the stopper is connected to the boss via a first shear pin extending in a vertical direction.

[0011] In one embodiment, the pre-tightening structure includes a first baffle plate arranged on the side wall of the saddle body and a second baffle plate arranged on the boss, the second baffle plate and the boss are connected by a second shear pin extending in the vertical direction, and the second baffle plate and the first baffle plate are connected by a third shear pin extending in the vertical direction, and the shear strength of the third shear pin is less than the shear strength of the second shear pin.

[0012] In one embodiment, the mounting groove is an arc-shaped concave structure, and the bottom of the saddle body has a convex structure matching the mounting groove.

[0013] In one embodiment, the lubrication structure is a polytetrafluoroethylene plate disposed in the mounting groove, and two sides of the polytetrafluoroethylene plate are respectively in contact with the mounting groove and the saddle body.

[0014] In one embodiment, the lubrication structure includes a plurality of lubrication parts embedded in the saddle body, and the end surfaces of the lubrication parts are in contact with the mounting grooves to form a swinging surface of an arc structure.

[0015] In one embodiment, the lubricating element is a solid lubricating column.

[0016] In one embodiment, the bottom of the saddle body is provided with a plurality of grooves evenly spaced apart, and the lubricating element is embedded in the grooves.

[0017] In one embodiment, the saddle body is further provided with a plurality of buffer grooves corresponding to the positions of the grooves, each of the buffer grooves is provided with a buffer spring in a compressed state, one end of the buffer spring is in contact with the buffer groove, and the other end is in contact with the end surface of the lubricating component.

[0018] In one embodiment, the lubrication structure includes a plurality of rollers disposed at the bottom of the saddle body, and the bottoms of the rollers are in contact with the mounting grooves to form a swinging surface with an arc-shaped structure.

[0019] The beneficial effects of the utility model are:

[0020] (1) The saddle body and the base are connected together by a pre-tightening structure. When the seismic energy received exceeds the pre-tightening strength of the pre-tightening structure, the pre-tightening structure is destroyed, and the saddle body is separated from the base. The saddle body swings along the installation groove under the action of the seismic energy absorbed by the main cable, reducing the impact of seismic energy on the main tower, effectively reducing the construction cost of the main tower, and at the same time benefiting the safety of the suspension bridge;

[0021] (2) The second shear pin and the third shear pin with different shear strengths in the preloaded structure can separate the saddle from the main tower under earthquakes of different intensities. The saddle swings along the swing plane under the action of the seismic energy of the main cable, reducing the seismic energy transmitted to the main tower and lowering the stiffness requirements and construction costs of the main tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0023] in:

[0024] Figure 1 A schematic structural diagram of an embodiment of the utility model is shown;

[0025] Figure 2 A structural schematic diagram showing another embodiment of the utility model;

[0026] Figure 3 Shows Figure 1 A schematic diagram of a partially enlarged structure of an embodiment;

[0027] Figure 4 Shows Figure 1 A schematic diagram of a partially enlarged structure of an embodiment;

[0028] Figure 5 Shows Figure 1 A schematic diagram of a partially enlarged structure of an embodiment;

[0029] Figure 6 A structural schematic diagram showing an embodiment of the pre-tightening structure of the utility model;

[0030] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0031] Reference numerals:

[0032] 1-saddle body, 2-main cable, 3-base, 4-mounting groove, 5-stopper, 6-boss, 7-first anti-shear pin, 8-second anti-shear pin, 9-third anti-shear pin, 10-PTFE slide plate, 11-solid lubrication column, 12-buffer spring, 13-roller, 14-gap, 15-first baffle, 16-second baffle, 17-rack, 18-pin shaft, 19-active part, 20-ratchet, 21-pawl, 22-compression spring. DETAILED DESCRIPTION

[0033] The utility model will be further described below in conjunction with the accompanying drawings.

[0034] The utility model provides a seismic isolation cable saddle, such as Figure 1As shown, including:

[0035] A saddle body 1, the saddle body 1 is used to fix the main cable 2;

[0036] Base 3, base 3 is connected to the main tower;

[0037] Among them, a mounting groove 4 is opened on the base 3, and the saddle body 1 is arranged in the mounting groove 4. A lubrication structure is arranged between the bottom surface of the saddle body 1 and the mounting groove 4, and a gap 14 for extending the self-vibration period of the saddle body 1 is provided between the saddle body 1 and the bosses 6 at both ends of the mounting groove 4. The saddle body 1 is also connected to the bosses 6 at both ends of the mounting groove 4 through a pre-tightening structure, and the contact surface between the lubrication structure and the mounting groove 4 is a swing surface of an arc structure;

[0038] It should be noted that the saddle body 1 and the base 3 are connected together by a pre-tightening structure. When the seismic energy received exceeds the pre-tightening strength of the pre-tightening structure, the saddle body 1 and the base 3 are separated, and the gap 14 between the saddle body 1 and the base 3 prolongs the natural vibration period of the saddle body 1. The saddle body 1 swings and slides along the swing surface, consumes part of the seismic energy, and reduces the seismic energy transmitted to the main tower. The saddle body 1 is arranged in the mounting groove 4 of the base 3. When the earthquake intensity is too large, the impact of the seismic energy on the main tower is reduced by the displacement of the saddle body 1. After the saddle body 1 slides to the maximum displacement, it is connected to the base 3 as a whole. The main tower and the saddle body 1 adapt to the earthquake together, thereby reducing the construction cost of the main tower and ensuring the safety of the suspension bridge.

[0039] Specifically, Figure 3 As shown, the pre-tightening structure includes a stopper 5 arranged on the side wall of the saddle body 1, the stopper 5 extends to the top of the boss 6, and the stopper 5 is connected to the boss 6 through a first shear pin 7 extending in the vertical direction, that is, the stopper 5 on the side wall of the saddle body 1 is connected to the bosses 6 at both ends of the base 3 by using the first shear pin 7. When the earthquake intensity exceeds the shear strength of the first shear pin 7, the saddle body 1 is separated from the base 3, and the saddle body 1 swings and slides in the base 3 to perform a pendulum motion, thereby reducing the earthquake energy transmitted to the main tower and reducing the construction cost of the main tower. When the saddle body 1 swings to the bosses 6 at both ends of the base 3, the main tower can also participate in absorbing the earthquake energy to ensure the safety of the suspension bridge;

[0040] In one embodiment, Figure 2 As shown, the pre-tightening structure includes a first baffle 15 arranged on the side wall of the saddle body 1 and a second baffle 16 arranged on the boss 6, the second baffle 16 and the boss 6 are connected by a second shear pin 8 extending in the vertical direction, and the second baffle 16 and the first baffle 15 are connected by a third shear pin 9 extending in the vertical direction, and the shear strength of the third shear pin 9 is less than the shear strength of the second shear pin 8;

[0041] It should be noted that the pre-tightening structure can form multi-level pre-tightening, such as Figure 2As shown, a second baffle 16 is arranged on the boss 6 through a second shear pin 8, and the second baffle 16 is connected to the first baffle 15 of the saddle body 1 through a third shear pin 9, and the shear strength of the third shear pin 9 is less than the shear strength of the second shear pin 8, that is, when the earthquake intensity is greater than the shear strength of the third shear pin 9 but less than the shear strength of the second shear pin 8, the third shear pin 9 breaks, and the saddle body 1 swings in the mounting groove 4, with the end of the second baffle 16 as the maximum displacement, and when the earthquake intensity increases, the saddle body 1 will The seismic energy is transmitted to the second baffle 16. When it is greater than the shear strength of the second shear pin 8, the second shear pin 8 breaks, and the saddle body 1 takes the boss 6 of the mounting groove 4 as the maximum displacement position, thereby increasing the swingable distance of the saddle body 1 to adapt to earthquakes of greater intensity, that is, the swing amplitude of the saddle body 1 can be gradually increased with the intensity of the earthquake, so that the saddle body 1 can be separated from the main tower under earthquakes of different intensities, and then perform pendulum motion to reduce the seismic energy transmitted to the main tower, thereby reducing the stiffness requirements and construction costs of the main tower;

[0042] In one embodiment, Figure 1 As shown, the mounting groove 4 is an arc-shaped concave structure, and the bottom of the saddle body 1 has a convex structure matching the mounting groove 4, that is, the saddle body 1 is made to perform pendulum motion under earthquake energy by using the concave and convex structures that cooperate with each other;

[0043] Specifically, Figure 3 As shown, the lubrication structure is a polytetrafluoroethylene slide plate 10 disposed in the mounting groove 4, and the two sides of the polytetrafluoroethylene slide plate 10 are respectively fitted with the mounting groove 4 and the saddle body 1, that is, the structure of the polytetrafluoroethylene slide plate 10 matches the mounting groove 4 and the bottom of the saddle body 1, that is, the saddle body 1 performs a pendulum motion on the polytetrafluoroethylene slide plate 10 by means of surface contact;

[0044] In one embodiment, Figure 4 As shown, the lubrication structure includes a plurality of lubrication parts embedded in the saddle body 1, the end faces of the lubrication parts are in contact with the mounting grooves 4 and form a swinging surface of an arc structure, and the lubrication parts are solid lubrication columns 11;

[0045] Furthermore, if Figure 4 As shown, the bottom of the saddle body 1 is provided with a plurality of grooves evenly spaced apart, the lubricating member is embedded in the grooves, and the saddle body 1 is also provided with a plurality of buffer grooves corresponding to the positions of the grooves, each buffer groove is provided with a buffer spring 12 in a compressed state, one end of the buffer spring 12 is in contact with the buffer groove, and the other end is in contact with the end surface of the lubricating member;

[0046] It should be noted that the solid lubricating column 11 is used as a lubrication point, and a plurality of solid lubricating columns 11 embedded in the saddle body 1 form a swinging surface of an arc structure, so that the saddle body 1 can swing in the mounting groove 4 of the base 3, and the buffer spring 12 provided at the same time can continuously act on the solid lubricating column 11, so that it can still fully contact with the mounting groove 4 of the base 3 after wear, and maintain a complete swinging surface;

[0047] In one embodiment, Figure 5 As shown, the lubrication structure includes a plurality of rollers 13 disposed at the bottom of the saddle body 1, that is, the roller 13 structure can also be used to dispose the roller 13 between the saddle body 1 and the mounting groove 4 of the base 3, so that the saddle body 1 can swing;

[0048] In one embodiment, Figure 6 As shown, the pre-tightening structure includes a stopper 5 arranged on the side wall of the saddle body 1, the stopper 5 extends to the top of the boss 6, the bottom of the stopper 5 has a rack 17, the boss 6 is provided with an active member 19 that can mesh with the rack 17, the active member 19 is installed on one side of the boss through a pin 18, a ratchet 20 and a pawl 21 located on the inner ring of the ratchet 20 are provided on the active member 19, the pawl 21 is installed on the side wall of the active member 19 through a compression spring 22, that is, in a normal state, the racks 17 on both sides of the stopper 5 are meshed with the active member 19, the saddle body 1 and the base 3 are connected to each other, and when an earthquake occurs, the pawl 21 contacts the ratchet 20 under the action of the earthquake acceleration and drives the ratchet 20 to rotate, thereby driving the active member 19 to rotate, so that the saddle body 1 and the base 3 are separated from each other;

[0049] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0050] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.

Claims

1. A swing type seismic isolation cable saddle, characterized in that: include: A saddle body, wherein the saddle body is used to fix the main cable; A base, the base being connected to the main tower; In which, a mounting groove is provided on the base, the saddle body is arranged in the mounting groove, a lubrication structure is provided between the bottom surface of the saddle body and the mounting groove, and a gap for extending the self-vibration period of the saddle body is provided between the saddle body and the bosses at both ends of the mounting groove, the saddle body is also connected to the bosses at both ends of the mounting groove through a pre-tightening structure, and the contact surface between the lubrication structure and the mounting groove is a swinging surface of an arc structure.

2. The swing type seismic isolation cable saddle according to claim 1, characterized in that: The pre-tightening structure comprises a stopper arranged on the side wall of the saddle body, the stopper extends to above the boss, and the stopper is connected to the boss via a first anti-shear pin extending in the vertical direction.

3. The swing type seismic isolation cable saddle according to claim 1, characterized in that: The pre-tightening structure includes a first baffle plate arranged on the side wall of the saddle body and a second baffle plate arranged on the boss, the second baffle plate and the boss are connected by a second shear pin extending in the vertical direction, and the second baffle plate and the first baffle plate are connected by a third shear pin extending in the vertical direction, and the shear strength of the third shear pin is less than the shear strength of the second shear pin.

4. A swing type seismic isolation cable saddle according to claim 2 or 3, characterized in that: The mounting groove is an arc-shaped concave structure, and the bottom of the saddle body has a convex structure matching the mounting groove.

5. The swing type seismic isolation cable saddle according to claim 4, characterized in that: The lubrication structure is a polytetrafluoroethylene slide plate arranged in the mounting groove, and two sides of the polytetrafluoroethylene slide plate are respectively in contact with the mounting groove and the saddle body.

6. The swing type seismic isolation cable saddle according to claim 4, characterized in that: The lubricating structure comprises a plurality of lubricating parts embedded in the saddle body, and the end surfaces of the lubricating parts are in contact with the mounting grooves to form swinging surfaces of an arc structure.

7. The swing type seismic isolation cable saddle according to claim 6, characterized in that: The lubricating element is a solid lubricating column.

8. The swing type seismic isolation cable saddle according to claim 6, characterized in that: The bottom of the saddle body is provided with a plurality of grooves evenly spaced and distributed, and the lubricating parts are embedded in the grooves.

9. The swing type seismic isolation cable saddle according to claim 8, characterized in that: The saddle body is also provided with a plurality of buffer grooves corresponding to the positions of the grooves, each of the buffer grooves is provided with a buffer spring in a compressed state, one end of the buffer spring contacts the buffer groove, and the other end contacts the end surface of the lubricating component.

10. The swing type seismic isolation cable saddle according to claim 4, characterized in that: The lubrication structure comprises a plurality of roller shafts arranged at the bottom of the saddle body, and the bottoms of the roller shafts are in contact with the mounting grooves to form a swinging surface of an arc structure.

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