CN221320659U - Cable clamp anti-slip device - Google Patents

Abstract

The utility model discloses a cable clamp anti-sliding device, which comprises a main cable and a cable saddle for installing the main cable, wherein cable clamps are arranged on the main cable positioned on two sides of the cable saddle, and the cable clamp is characterized in that: the cable saddle is characterized by further comprising an anti-slip cable, the middle part of the anti-slip cable rides over the cable saddle, and two ends of the anti-slip cable are respectively connected with cable clamps on two sides of the cable saddle; the anti-slip inhaul cable is a flexible inhaul cable, so that at least one end of the flexible inhaul cable is anchored on a cable clamp on one side of the cable saddle in a mode of applying certain prestress. According to the utility model, the cable clamps on two sides of the cable saddle are connected into a whole by arranging the flexible anti-slip cable, and a certain prestress is applied to the anti-slip cable, so that the main cable, the cable saddle and the cable clamps on two sides of the cable saddle form a prestressed cable system, the stress characteristics of the prestressed cable system are converted and self-adaptively balanced in the system, and no extra load is caused to other components such as a bridge tower, a stiffening beam and the like.

Description

Cable clamp anti-slip device

Technical Field

The utility model belongs to the technical field of bridges, and particularly relates to a cable clamp anti-slip device.

Background

The self-anchored suspension bridge is characterized in that a main cable is directly anchored on a stiffening girder, and the stiffening girder bears the horizontal component force of the main cable, so that a balance system is formed. According to the stress characteristics, the main cable is generally larger in sagittal span, so that the inclination angle of a sling close to the bridge tower and the main cable is larger, and a cable clamp is required to provide larger anti-skid force for the main cable. The cable clamp is characterized in that the cable clamp is formed by fastening bolt pairs, so that static friction force is generated between the main cable steel wire and the inner wall of the cable clamp to provide anti-sliding force for the sling, therefore, the cable clamp which is generally close to a bridge tower is longer, the number of the bolt pairs is more, and the uniformity of the fastening force between high-strength bolts is poor. And the main cable steel wire can be stretched after being stressed, the cross section is reduced, and the fastening force loss of the cable clamp bolt is caused, so that the anti-skid performance between the cable clamp and the main cable is affected. The problem of cable clip slippage often occurs in the operation process, and the structural safety of a bridge is seriously affected. Meanwhile, the main cable is constrained in the cable saddle through static friction force between the cable strand steel wires and the cable saddle groove. Because the inclination angles of the two sides of the bridge tower are different, unequal horizontal component forces can be generated on the two sides, and the main cable is in sliding risk. Especially when there is the unbalanced load of limit in bridge tower one side, the static friction force of main cable and saddle groove can't satisfy the anti-skidding requirement, leads to the relative slip of main cable in the saddle groove, causes the line shape and the stress state change of main cable to influence bridge structure safety. Therefore, how to solve the relative sliding problem of the main cable and the tower end cable clamp and the main cable and the cable saddle is a technology which needs to be solved urgently for the self-anchored suspension bridge.

The prior art discloses an anti-sliding device of a large-inclination-angle space inclined main cable clamp, wherein the top cable clamp of a main cable is connected with a bridge tower by adopting a rigid pull rod assembly, adjacent cable clamps are connected through the rigid pull rod assembly, and the cable clamps on the main cable are connected into a whole along the length direction, so that the aim of preventing the cable clamps from sliding is fulfilled. However, this method also has disadvantages: the connection between the cable clamps and the cable towers are connected by adopting rigid pull rods, when the main cable is subjected to external load and temperature alternation, the main cable can deform, the deformation capacity of the rigid pull rods is poorer than that of the steel wires of the main cable, so that part of load of the main cable is transmitted to the bridge towers through the rigid pull rods, the bridge towers generate additional bending stress, and the stress balance of the whole system is influenced; the rigid pull rod has poor fatigue performance, is easy to generate fatigue fracture failure under the action of alternating load, and cannot achieve the anti-slip effect; meanwhile, the anti-sliding device still cannot solve the sliding problem of the main cable and the cable saddle.

The prior art discloses a combination cable clamp, adds an anti-skidding cable clamp again in the cable clamp upper end of installation hoist cable to adopt connection structure to connect two cable clamps into an organic wholely, through the synergistic effect of hoist cable clamp and anti-skidding cable clamp, satisfy the anti-skidding performance between main cable and the cable clamp. However, this method also has disadvantages: an anti-skid rope clip and a connecting structure are additionally added, and a certain installation distance is needed between the sling rope clip and the anti-skid rope clip, so that the problem of insufficient installation space exists in the practical application process, and the method cannot be implemented and has a certain limitation; after the anti-skid cable clamps are additionally arranged, the local rigidity of the main cable is increased, so that the stress deformation of the main cable can be influenced, and the stress state is changed; meanwhile, the method still cannot solve the problem of slippage of the main cable and the cable saddle.

The information disclosed in the background section above is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of utility model

To above not enough, this patent development is a cable clamp anti-skidding device, through setting up flexible anti-skidding cable, connects the cable clamp of cable saddle both sides into an organic whole to apply certain prestressing force to anti-skidding cable, make the cable clamp of main cable, cable saddle and cable saddle both sides form a cable system that has prestressing force. When the downward sliding force of the cable clamp is overlarge, the main cable anti-sliding device provides an upward prestress for the cable clamp connecting structure, so that the anti-sliding performance between the main cable and the cable clamp is improved; meanwhile, the stress characteristics are converted and self-adaptively balanced in the system, so that additional loads can not be caused to other components such as the bridge tower, the stiffening beam and the like.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the cable clamp anti-sliding device comprises a main cable and a cable saddle for installing the main cable, wherein cable clamps are arranged on the main cable positioned on two sides of the cable saddle; the cable saddle is characterized by further comprising an anti-skid cable, the middle part of the anti-skid cable rides over the cable saddle, and two ends of the cable are respectively connected with cable clamps on two sides of the cable saddle; the anti-slip inhaul cable is a flexible inhaul cable, so that at least one end of the flexible inhaul cable is anchored on a cable clamp on one side of the cable saddle in a mode of applying certain prestress.

Specifically, the cable clamp is of a two-half structure, an epitaxial flange structure is arranged on the end face, close to the cable saddle, of the cable clamp, and an anchoring hole is formed in the epitaxial flange structure; the end part of the anti-slip inhaul cable is anchored on the anchoring hole, and a certain gap is preset between the inner circular surface of the extension type flange structure and the main cable, so that the contact with the steel wire of the main cable is avoided; the anchor hole of the extension flange structure is preset with a distance from the end face of the cable clamp body, so that the installation space of the anti-skid inhaul cable is met.

Specifically, the quantity of anti-skidding connection otic placodes sets up to two at least, and is the setting of certain contained angle between two at least skidding connection otic placodes.

Specifically, the cable saddle is provided with a saddle groove, and the main cable is arranged in the saddle groove; the saddle groove is characterized in that a mounting plate is further arranged above the saddle groove, the mounting plate is provided with a ring groove structure, and the anti-slip inhaul cable is mounted on the ring groove structure.

Specifically, the prestress applied by the anti-slip cable is between 0.1 and 0.3 times of the breaking force of the anti-slip cable and is smaller than the maximum static friction force between the cable clamp and the main cable.

Compared with the prior art, the utility model has the following beneficial effects:

1. The main cable anti-slip device rides the cable saddle through the anti-slip cable 3, the cable clamps on two sides of the bridge tower are respectively connected into a whole, and certain prestress is applied to the anti-slip cable, so that the main cable 1, the cable saddle 2 and the cable clamps 4 on two sides of the bridge tower form a cable system with prestress, and when the cable clamps have overlarge sliding force or limit unbalanced load exists on one side of the bridge tower cable saddle, the stress characteristics of the cable system can be converted and self-adaptively balanced in the system, and additional loads can not be caused to other components such as the bridge tower, a stiffening beam and the like.

2. The main cable anti-slip device provides an upward prestress for cable clamps on two sides of the bridge tower, the sliding directions of the cable clamps on two sides of the bridge tower are opposite, and after the cable clamps are connected through an anti-slip inhaul cable, self-balancing of the sliding force of the two cable clamps can be realized, so that the overall anti-slip safety of the cable clamp connecting structure is improved;

3. The main cable anti-sliding device adopts the flexible inhaul cable, can follow the main cable and generate synchronous deformation due to stress, can not generate additional stress, only bears the sliding force of the cable clamp and the unbalanced force on two sides of the cable saddle, and improves the anti-sliding performance and stability of the main cable anti-sliding device.

Drawings

FIG. 1 is a schematic view of a cable clip sliding device of the present utility model for a bridge.

Fig. 2 is an overall schematic of the prestressed cable clip anti-slip device of fig. 1 a.

Fig. 3 is a side view of the cable saddle of the present utility model.

FIG. 4 is a schematic view of a mounting plate of the present utility model.

Fig. 5 is a cross-sectional view of the ring groove of the present utility model.

FIG. 6 is a schematic view of the anti-slip cable of the present utility model.

Fig. 7 is a front view of a first embodiment of the cord clip of the present utility model.

Fig. 8 is a side view of a first embodiment of the cord clip of the present utility model.

Fig. 9 is a front view of a second embodiment of the cord clip of the present utility model.

Fig. 10 is a side view of a second embodiment of the cord clip of the present utility model.

Fig. 11 is a side view of a third embodiment of the cord clip of the present utility model.

In the figure, 1-main cable; 2-cable saddle; 21-a mounting plate; 211-ring grooves; 22-saddle grooves; 3-anti-slip inhaul cables; 31-rope body; 32-an anchor; 33-nut; 4-cable clips; 41-sling connection ear plates; 42-an epitaxial flange structure; 421-anchoring holes; 43-bolt pair; 42' -anti-slip attachment lugs; 421' -a first anti-slip attachment tab; 422-second anti-slip attachment tab.

Detailed Description

To describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description is made with reference to the embodiments in conjunction with the accompanying drawings. In the description of the present embodiment, it should be understood that terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience in describing the present embodiment and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

The embodiment discloses a cable clip anti-sliding device which is mainly applied to a middle tower position of a bridge of an illustration 1, and particularly as shown in fig. 2, mainly comprises a main cable 1, a cable saddle 2, an anti-sliding cable 3 and a cable clip 4. The main cable is arranged in the saddle groove of the cable saddle, the anti-slip cable rides over the mounting plate of the cable saddle, the cable saddle and the cable clamps on two sides of the bridge tower are respectively connected into a whole, and a certain prestress is applied to the anti-slip cable, so that a cable system with prestress is formed.

Specifically, referring to the saddle 2 shown in fig. 3 to 5, the saddle 2 is provided with a saddle groove 22 in which the main cable is restrained by static friction between the strand wires and the saddle groove; the installation plate 21 is arranged above the saddle groove of the saddle, the installation plate is provided with the annular groove structure 211, the number of the installation plates is set according to the number of the anti-slip cables, and can be 1 or 2 or more, and the installation plate is used for installing the anchoring anti-slip cables 3 and transmitting prestress applied by the anti-slip cables symmetrically arranged on two sides of the bridge tower to the saddle.

Specifically, referring to the cable clamp 4 shown in fig. 7-8, the cable clamp 4 is of a two-half cable clamp structure, and a static friction force is generated between the main cable steel wire and the inner wall of the cable clamp by fastening the bolt pair 43, so that the cable clamp is clamped on the main cable 1 to provide anti-slip force for the sling; the cable clamp is provided with a sling connecting lug plate 41 for installing a sling, and the main cable and the stiffening girder are connected into a whole through the sling and the cable clamp to transfer the load of the stiffening girder to the main cable; the end face of the cable clamp 4 is provided with an extension type flange structure 42 connected with the anti-slip cable, the extension type flange structure is integrally cast or welded with the two-half type cable clamp body, and a plurality of anchoring holes 421 which can penetrate through the anti-slip cable are formed in the extension type flange structure 42 and are used for installing and anchoring the anti-slip cable 3 and transmitting prestress applied by the anti-slip cable to the cable clamp.

As shown in fig. 6, after the anti-slip cable 3 rides over the mounting plate 21 of the cable saddle, one end of the anti-slip cable 3 passes through the anchoring hole 421 of the cable clamp and is anchored on the two half ring flange structure 42 of the cable clamp; the other end passes through a cable clip anchoring hole 421 at the other side of the bridge tower and is anchored on the two half-type ring flange structure 42 of the cable clip; the anti-slip inhaul cable 3 is a flexible inhaul cable, and the rope body 31 can be a steel wire finished rope, a steel stranded wire rope or a steel wire rope; the two ends of the anti-slip cable 3 are provided with an anchor 32 and a nut 33, so that the anti-slip cable 3 can be anchored on a cable clamp and a cable saddle, and the application of prestress and the adjustment of length can be performed.

The cable clamp anti-sliding device in the embodiment rides over the cable saddle through a plurality of anti-sliding cables 3, the cable clamps on two sides of the bridge tower are connected into a whole in an anchoring way at two ends, and certain prestress is applied to the anti-sliding cables 3, so that a cable system with prestress is formed by the main cable 1, the cable saddle 2 and the cable clamps 4 symmetrically arranged on two sides of the bridge tower, and the following effects are achieved: the method comprises the following steps: because the main cable anti-slip device has internal prestress, the main cable anti-slip device provides an upward anti-slip force for cable clamps on two sides of the bridge tower; meanwhile, the sliding directions of the cable clamps on the two sides of the bridge tower are opposite, and after the cable clamps are connected through the anti-sliding cable, self-balancing of the sliding force of the two cable clamps can be realized, so that the overall anti-sliding safety of the cable clamp connecting structure is improved; and two,: the anti-slip inhaul cable of the main cable anti-slip device adopts a flexible inhaul cable, has elastic modulus and elongation similar to those of the main cable, and can also deform along with the main cable when the main cable is stressed to deform, so that no additional stress is generated, and only the sliding force of the cable clamp and the unbalanced force on the two sides of the cable saddle are born; and thirdly,: the main cable anti-slip device enables a cable system with prestress to be formed among the main cable, the cable saddle and cable clamps on two sides of the bridge tower, the stress characteristic of the cable system can be converted and self-adaptively balanced in the cable system, and extra loads can not be caused to other components such as the bridge tower and the stiffening beam. The object of the present embodiment is achieved.

Example 2

The difference between this embodiment and embodiment 1 is that one end of the anti-slip cable 3 is anchored with one cable clamp 4, and one end is hinged with the other cable clamp, specifically, referring to fig. 9-10, the hinged cable clamp 4 includes an upper cable clamp body and a lower cable clamp body, and the anti-slip connecting lug plate 42' and the sling connecting lug plate 41 are respectively arranged at the upper end and the lower end of the upper cable clamp body and the lower cable clamp body; the anti-slip connection lug plate 42' and the sling connection lug plate 41 are respectively provided with two opposite axial ends of the upper cable clamp body and the lower cable clamp body, wherein the anti-slip connection lug plate 42' is arranged at one end of the upper cable clamp body close to the cable saddle, the sling connection lug plate 41 is arranged at one end of the lower cable clamp body far away from the cable saddle 2, and one end of the anti-slip cable 3 is hinged with the anti-slip connection lug plate 42' through a pin shaft.

Example 3

In this embodiment, based on embodiment 2, the number of the anti-slip connection lugs of the cable clip is two, as shown in fig. 11, the first anti-slip connection lugs 421' and the second anti-slip connection lugs 422 are respectively, and a certain angle is formed between the two anti-slip connection lugs.

The construction method of the bridge prestress main cable anti-slip device of the embodiment comprises the following implementation steps:

1. Manufacturing a main cable, a cable saddle, a cable clamp and an anti-skid inhaul cable in a factory;

2. The cable saddle is arranged on the bridge tower, main cable strands are sequentially arranged, and cable tightening construction is carried out after the main cable strands are arranged;

3. According to the installation positions of the cable clamps, the cable clamps are sequentially installed, and fastening of the bolt pairs is performed;

4. The upper end of the sling is connected with the lug plate of the cable clamp, and the lower end of the sling is connected with the anchoring structure of the stiffening girder and performs system conversion according to requirements;

5. The mounting plate is mounted above the saddle groove,

6. After the anti-skid inhaul cable rides the mounting plate of the saddle, the cable body is mounted in the annular groove, one end of the anti-skid inhaul cable passes through the anchoring hole of the cable clamp, and the nut is mounted to anchor the anti-skid inhaul cable on the cable clamp; the other end passes through a cable clip anchoring hole on the other side of the bridge tower, and a nut is arranged to anchor the cable clip anchoring connecting piece; repeating the step 6, and installing other anti-slip inhaul cables;

7. Tensioning equipment for installing an anti-slip inhaul cable;

8. The two ends of the anti-slip inhaul cable are synchronously tensioned, a certain prestress is applied to the anti-slip device, the applied prestress value is smaller than the maximum static friction force between the cable clamp and the main cable and is larger than the nominal breaking force of the 0.1 anti-slip inhaul cable, and the cable clamp on the two sides of the main cable, the cable saddle and the bridge tower form a cable system with prestress inside.

While the utility model has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.

Claims (5)

1. The utility model provides a cable clamp anti-skidding device, includes the main cable to and be used for installing the cable saddle of main cable, be located all be provided with cable clamp on the main cable of cable saddle both sides, its characterized in that: the cable saddle is characterized by further comprising an anti-skid cable, the middle part of the anti-skid cable rides over the cable saddle, and two ends of the cable are respectively connected with cable clamps on two sides of the cable saddle; the anti-slip inhaul cable is a flexible inhaul cable, so that at least one end of the flexible inhaul cable is anchored on a cable clamp on one side of the cable saddle in a mode of applying certain prestress.

2. The cable clamp anti-sliding device according to claim 1, wherein the cable clamp is of a two-half structure, an extension type flange structure is arranged on the end face of the cable clamp, which is close to the cable saddle, and an anchoring hole is arranged on the extension type flange structure; the end part of the anti-slip inhaul cable is anchored on the anchoring hole, and a certain gap is preset between the inner circular surface of the extension type flange structure and the main cable; the anchor hole of the extension flange structure is preset with a certain distance from the end face of the cable clamp body.

3. A cable clip anti-slip device according to claim 1, wherein the number of anti-slip lugs is at least two, and at least two lugs are disposed at an angle therebetween.

4. A cable grip anti-slip device according to claim 1, wherein the cable saddle is provided with a saddle groove in which the main cable is mounted; the saddle groove is characterized in that a mounting plate is further arranged above the saddle groove, the mounting plate is provided with a ring groove structure, and the anti-slip inhaul cable is mounted on the ring groove structure.

5. The cable grip anti-slip device of claim 1, wherein the pre-stress applied by the anti-slip cable is between 0.1 and 0.3 times the breaking force of the anti-slip cable and less than the maximum static friction force between the cable grip and the main cable.