Shuttle tube of puller

Abstract

The utility model relates to the technical field of engineering construction. The shuttle tube of the puller comprises a tube body and conical transition sections arranged at the two ends of the tube body, the cross section of the tube body is oval, and the diameter of the tube body in the vertical direction is larger than that of the tube body in the horizontal direction. According to the utility model, the traditional tube body design with a circular cross section is changed, and the oval design is adopted, so that the risk that the connecting steel plate presses against the rim of the pulley can be reduced, and the stable contact between the shuttle tube body and the pulley groove is ensured. And due to the oval design, the resistance is smaller when the pipe body and the pulley groove of the pulley are removed, the traction resistance is reduced, and the traction smoothness is improved.

Description

Technical Field

[0001] This utility model relates to the field of engineering construction technology, specifically to a puller shuttle tube. Background Technology

[0002] When pulling the main cable during suspension bridge construction, a traction device is commonly used to connect the traction system to the main cable strands. The traction device pulls the strands into position via a guide pulley system. The structure of the traction device is as follows: Figure 1 As shown, it includes a wedge-shaped connecting frame, a stable triangular structure composed of horizontal connecting rods, front connecting rods and rear connecting rods. The wedge-shaped connecting frame is equipped with a front shuttle tube, the horizontal connecting rods and the rear connecting rods are equipped with a rear shuttle tube at their intersection, and a counterweight rod and counterweight block are set at the intersection of the front connecting rods and the rear connecting rods.

[0003] Currently, traditional shuttle tubes use a circular cross-section tube body and are connected to the wedge-shaped connecting frame of the puller body through a connecting steel plate. During operation, when the shuttle tube passes through the pulley, the connecting steel plate is prone to colliding with the pulley rim on the guide pulley group, causing the shuttle tube to fail to make effective contact with the pulley groove, damaging the pulley, and affecting the normal operation of the puller. Summary of the Invention

[0004] The purpose of this invention is to provide a puller shuttle tube with an elliptical cross section that can reduce the risk of collision.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is: a puller shuttle tube, comprising a tube body and conical transition sections disposed at both ends of the tube body, wherein the cross-section of the tube body is elliptical and the diameter in the vertical direction is greater than the diameter in the horizontal direction.

[0006] Preferably, a side hole is provided on one side wall of the tube in the left-right direction, and the side hole extends along the length direction of the tube.

[0007] Preferably, it also includes two connecting steel plates located at the side holes for connecting the tube body to the wedge-shaped connecting frame. The connecting steel plates are located on the outer side walls of the tube body at both ends of the side holes and are welded to the tube body. An arc-shaped head is provided at one end of the connecting steel plate opposite to the tube body. A first positioning step is provided on the side of the connecting steel plate away from the tube body for engaging with the steel pad outside the wedge-shaped connecting frame. A second positioning step is provided on the side closer to the tube body for engaging with the side wall of the tube body at the end of the side hole.

[0008] Preferably, the end of the connecting steel plate away from the arc-shaped head is provided with a tapered head.

[0009] The beneficial effects of the present utility model are mainly reflected in: it changes the traditional design of the pipe body with a circular cross-section and adopts an oval design, which can reduce the risk of the connecting steel plate pressing against the pulley rim and ensure the stable contact between the shuttle pipe body and the pulley groove. Moreover, the oval design makes the resistance smaller when the pipe body and the pulley groove are disengaged, reduces the traction resistance, and improves the smoothness of traction. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the puller;

[0011] Figure 2 is a schematic structural diagram of the front end face of the shuttle pipe of the present utility model when contacting with the pulley groove;

[0012] Figure 3 is Figure 2 the top view of the pipe body in

[0013] Figure 4 is Figure 3 the left view of

[0014] Figure 5 is a schematic structural diagram of the connecting steel plate;

[0015] Figure 6 is a schematic three-dimensional structural diagram of the shuttle pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] As Figure 1 shown, a puller shuttle pipe is installed on the puller and is used to connect with the towing rope of the traction system, and the towing rope can be inserted into the shuttle pipe. The puller supporting the present utility model can adopt a commercially available conventional puller or can also adopt the structure shown in Figure 1 . Since the puller has many replaceable structures and is not an essential feature for solving the technical problems of the present utility model, it will not be elaborated herein.

[0017] As Figure 2-6 shown, the shuttle pipe of the present utility model includes a pipe body 1 and conical transition sections 2 provided at both ends of the pipe body 1. The cross-section of the pipe body 1 is oval, and the diameter in the vertical direction is greater than the diameter in the horizontal direction. Generally, the diameter of the pipe body 1 in the vertical direction is between 1.5 and 2 times the diameter in the horizontal direction, and it has a good oval surface linearity. The conical transition sections 2 are located at both ends of the pipe body 1 and smoothly transition from a circular pipe to an oval pipe.

[0018] On one side wall of the pipe body 1 of the present utility model in the left-right direction, a side hole 3 is provided. The side hole 3 extends along the length direction of the pipe body 1. The side hole 3 can be used to realize the assembly limit between the pipe body 1 and the connecting steel plate 4, and can also be used as a side channel for strengthening the connection strength between the towing rope and the pipe body 1.

[0019] Furthermore, in order to achieve the assembly of tube 1 on the wedge-shaped connecting bracket, such as Figure 3-6 As shown, this utility model also includes two connecting steel plates 4 located at the side holes 3 for connecting the pipe body 1 to the wedge-shaped connecting frame. The connecting steel plates 4 are located on the outer walls of the pipe body 1 at both ends of the side holes 3 and are welded to the pipe body 1. An arc-shaped head 5 is provided at one opposite end of the connecting steel plate 4, providing greater clearance and facilitating operation. A first positioning step 6 is provided on the side of the connecting steel plate 4 away from the pipe body 1 for engaging with a steel pad outside the wedge-shaped connecting frame, and a second positioning step 7 is provided on the side closer to the pipe body 1 for engaging with the side wall of the pipe body 1 at the end of the side hole 3. Through the special design of the connecting steel plates 4, the connecting steel plates 4 of this utility model can better align with the wedge-shaped connecting frame and the pipe body 1, improving installation accuracy and connection strength.

[0020] This invention changes the traditional circular cross-section tube design, adopting an elliptical design. This reduces the risk of the connecting steel plate 4 pressing against the pulley rim, ensuring stable contact between the shuttle tube and the pulley groove. Furthermore, the elliptical design reduces resistance when the tube and pulley groove disengage, lowering traction resistance and improving traction smoothness. In addition, to further reduce the risk of the connecting steel plate 4 impacting the pulley, such as... Figure 4 and 5 As shown in the figure, a conical head 8 is provided at the end of the connecting steel plate away from the arc-shaped head 5.

Claims

1. A shuttle tube for a puller, characterized in that: It includes a tube body (1) and conical transition sections (2) set at both ends of the tube body (1). The cross-section of the tube body (1) is elliptical, and the diameter in the vertical direction is greater than the diameter in the horizontal direction.

2. The traction shuttle tube according to claim 1, characterized in that: A side hole (3) is provided on one side wall of the tube body (1) in the left-right direction, and the side hole (3) extends along the length direction of the tube body (1).

3. The traction shuttle tube according to claim 2, characterized in that: It also includes two connecting steel plates (4) located at the side holes (3) for connecting the tube body (1) to the wedge-shaped connecting frame. The connecting steel plates (4) are located on the outer side walls of the tube body (1) at both ends of the side holes (3) and are welded to the tube body (1). An arc-shaped head (5) is provided at one end of the connecting steel plates (4). A first positioning step (6) is provided on the side of the connecting steel plates (4) away from the tube body (1) for engaging with the steel pad outside the wedge-shaped connecting frame. A second positioning step (7) is provided on the side of the connecting steel plates (4) close to the tube body (1) for engaging with the side wall of the tube body (1) at the end of the side holes (3).

4. The traction shuttle tube according to claim 3, characterized in that: A conical head (8) is provided at the end of the connecting steel plate away from the arc-shaped head (5).

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