Traction guide device for stay cable

Abstract

The utility model discloses a traction guide device for a stay cable. The traction guide device comprises a left half ring, a right half ring and a hexagon socket cap screw connecting the left half ring and the right half ring. Screw grooves are formed in the left half ring and the right half ring; the hexagon socket cap screws are mounted in the screw grooves; each of the left half ring and the right half ring comprises a circular ring end and a circular truncated cone end, and a positioning boss is arranged between the circular ring end and the circular truncated cone end. In the traction process of the stay cable, a smooth transition section is formed between the connecting sleeve and the anchor cup, steps caused by inconsistent outer diameters of the connecting sleeve and the anchor cup are eliminated, accurate guidance is provided for the anchor cup, the anchor cup can smoothly penetrate through a cable guide pipe, structural damage is avoided, and meanwhile construction safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge cable installation technical field especially is related to a kind of traction guiding device for stay cable. BACKGROUND

[0002] Stay cable is mainly used to connect the tower and main girder of cable-stayed bridge, and is the main load-bearing component of cable-stayed bridge. It forms a stable structural system between the tower and the main girder by tensioning. It is generally composed of cable body, anchor and other parts. The cable body is made of high-strength steel wire or steel strand to provide strong tensile capacity. The anchor is the key component for reliable connection of the cable and the structure, and the anchor cup is an important component. The inner and outer sides of the anchor cup are usually connected by a trapezoidal thread structure. This connection method has good self-locking performance and can effectively prevent loosening to ensure the anchoring reliability of the cable during long-term use.

[0003] When installing the cable, the inner thread of the anchor cup is connected with the traction tensioning rod through the connecting sleeve. The tensioning rod is pulled by the jack to drive the anchor cup through the cable guide pipe, and finally fixed. The outer diameter of the connecting sleeve is usually smaller than that of the anchor cup, resulting in a circumferential step at the connection between the two. The existence of this step brings many problems: on the one hand, the existence of the circumferential step is prone to cause collision between the anchor cup and the cable guide pipe. Once the collision occurs, the anticorrosive layer on the surface of the anchor cup may be damaged, and the thread teeth may also be injured. The damage of the anticorrosive layer will weaken the protection of the anchor cup, making it more susceptible to corrosion; the injury of the thread teeth may affect the firmness of the connection between the anchor cup and the nut. On the other hand, if the step is pressed against the cable guide pipe and continues to be tensioned, the risk is extremely high. This not only may cause local damage to the cable guide pipe, affecting the installation of the subsequent built-in shock absorber, but also may cause stress concentration at the step of the cable, reduce the local strength, and even cause serious safety accidents such as cable rupture, bringing great safety hazards to the engineering structure. SUMMARY

[0004] The utility model aims at a kind of traction guiding device for stay cable, and its purpose is to solve the shortcomings of prior art. During the traction of stay cable, the device forms a gentle transition at the step, eliminates the step caused by the inconsistent outer diameter, provides accurate guidance for the anchor cup, and enables it to smoothly pass through the cable guide pipe, avoiding structural damage while ensuring the safety of construction.

[0005] The utility model employs the technical scheme as follows: a kind of traction guiding device for stay cable, including left half ring, right half ring and the inner hexagonal cylindrical head screw of connecting the left half ring and right half ring;The left half ring and right half ring are equipped with screw groove, and the inner hexagonal cylindrical head screw is installed in screw groove;The left half ring and right half ring include annular end and circular platform end, and positioning boss is equipped between annular end and circular platform end.

[0006] Further, the end of the left half ring and the right half ring is provided with a screw hole, and the inner hexagonal cylindrical head screw is detachably connected with the left half ring and the right half ring through the screw hole.

[0007] Further, the positioning boss extends along the circumferential direction of the left half ring and the right half ring, and is used for positioning and matching the left half ring and the right half ring during assembly.

[0008] Further, the circular table end is a conical surface structure.

[0009] Further, the inner wall of the circular ring end matches the relief groove of the outer side surface of the anchor cup, and the inner wall of the circular table end matches the connecting sleeve.

[0010] The utility model has the beneficial effects that:

[0011] 1. The step is effectively prevented from abutting against the cable guide pipe, and the cable is smoothly passed, so that the construction difficulty is reduced, and the construction efficiency is improved.

[0012] 2. The corrosion time of the anchor cup material is effectively delayed, and the service life of the cable is prolonged.

[0013] 3. The anchor cup thread is prevented from being knocked, and the problems of deformation, wear or damage of the thread are effectively avoided; the cable nut and the anchor cup are smoothly screwed, and the cable nut and the anchor cup are firmly connected.

[0014] 4. The deformation problem of the cable guide pipe caused by the collision of the anchor cup is reduced, the built-in shock absorber is conveniently installed, and the construction time is saved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure schematic view of the utility model;

[0016] Figure 2 It is the left half ring schematic view of the utility model;

[0017] Figure 3 It is the right half ring schematic view of the utility model;

[0018] Figure 4 It is the working schematic view of the utility model;

[0019] In the drawing: 1 is the left half ring, 2 is the right half ring, 3 is the inner hexagonal cylindrical head screw, 4 is the screw groove, 5 is the circular ring end, 6 is the circular table end, 7 is the positioning boss, 8 is the screw hole, 9 is the tension rod, 10 is the connecting sleeve, 11 is the anchor cup, and 12 is the cable guide pipe. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with the drawings.

[0021] As Figures 1 to 3As shown, the utility model is a kind of traction guiding device for stay cable, including left half ring 1, right half ring 2 and the inner hexagonal head screw 3 of connecting left half ring and right half ring;Left half ring 1 and right half ring 2 are equipped with screw groove 4, and inner hexagonal head screw 3 is installed in screw groove 4;The end of left half ring 1 and right half ring 2 is equipped with screw hole 8, and inner hexagonal head screw 3 realizes the detachable connection of left half ring 1 and right half ring 2 by screw hole 8.Left half ring 1 and right half ring 2 all include ring end 5 and circular platform end 6, and the inner wall of ring end 5 cooperates with the relief groove of anchor cup 11 outer side end face, and the inner wall of circular platform end 6 is attached to connecting sleeve 10.Circumferential direction of positioning boss 7 between ring end 5 and circular platform end 6 extends, and is used to realize the positioning cooperation of left half ring 1 and right half ring 2 when assembling.

[0022] As Figure 4 As shown, the utility model is used before stay cable traction operation, and outer thread of connecting sleeve 10 is screwed into the inner thread of anchor cup 11.The inner wall of ring end 5 of traction guiding device cooperates with the relief groove of anchor cup 11 outer side end face, and the inner wall of circular platform end 6 is attached to connecting sleeve 10, then inner hexagonal head screw 3 is used to connect two parts firmly, to ensure the stability of structure.Then, tension rod 9 is screwed into the inner thread of connecting sleeve 10, when external force is applied to traction tension rod 9, circular platform end 6 of traction guiding device plays a leading role when entering cable guide pipe 12 by its own taper structure, effectively guiding anchor cup to pass through cable guide pipe 12.Traction guiding device plays a crucial role in the whole process, not only can prevent the occurrence of the situation that step is resisted cable guide pipe 12 mouth, but also can protect the anticorrosive layer of anchor device and thread from damage, so as to guarantee the smooth progress of stay cable traction work.

Claims

1. A traction and guiding device for stay cables, characterized in that, It includes a left half ring (1), a right half ring (2), and an internal hexagonal head screw (3) connecting the left half ring and the right half ring; both the left half ring (1) and the right half ring (2) are provided with screw grooves (4), and the internal hexagonal head screw (3) is installed in the screw grooves (4); both the left half ring (1) and the right half ring (2) include a circular end (5) and a frustum end (6), and a positioning boss (7) is provided between the circular end (5) and the frustum end (6).

2. The traction and guiding device for a stay cable according to claim 1, characterized in that, Both the left half ring (1) and the right half ring (2) are provided with screw holes (8) at their ends. The internal hexagonal head screw (3) achieves a detachable connection between the left half ring (1) and the right half ring (2) through the screw holes (8).

3. A traction and guiding device for a stay cable according to claim 1, characterized in that, The positioning boss (7) extends along the circumferential direction of the left half ring (1) and the right half ring (2) to achieve positioning and engagement of the left half ring (1) and the right half ring (2) during assembly.

4. A traction and guiding device for a stay cable according to claim 1, characterized in that, The frustum end (6) is a conical structure.

5. A traction and guiding device for a stay cable according to claim 1, characterized in that, The inner wall of the annular end (5) is fitted with the relief groove on the outer end face of the anchor cup, and the inner wall of the frustum end (6) is fitted with the connecting sleeve.

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