Box girder rapid threading device

Abstract

The application discloses a box girder rapid threading device, and belongs to the technical field of steel strand threading, which comprises a box girder main body and a base, a pre-buried pipe is inlaid and installed in the inside of the box girder main body, a guide is arranged in the inside of the pre-buried pipe, a steel strand is fixedly connected to the rear end of the guide, a groove is formed in the outer surface of the guide, and a ball is rotatably connected to the inside of the groove; the steel wire rope on the traction wheel is fixedly connected with the steel strand through the guide, the traction wheel is driven to rotate through the cooperation between the speed reducer and the driving motor, so that the guide and the steel strand are driven to pass through the inside of the box girder main body along the pre-buried pipe through the steel wire rope, the inner wall of the pre-buried pipe and the end of the steel strand are protected through the guide during the traction process, and the ball is arranged to help reduce the friction between the guide and the pre-buried pipe, so that the threading construction of the steel strand can be quickly completed.

Description

Technical Field

[0001] This application relates to the field of steel strand threading technology, and in particular to a rapid threading device for box girders. Background Technology

[0002] In bridge construction, box girders are a common structural form, and prestressing is an indispensable process. The installation of prestressed steel strands is particularly crucial. Therefore, prestressed steel strands are typically installed inside box girders to improve the bridge's load-bearing capacity and durability. Prestressed steel strands are stranded steel cables composed of multiple high-strength steel wires, and undergo stress-relief treatment (stabilization treatment), making them suitable for prestressed concrete and similar applications.

[0003] In existing steel strand installation processes, the ends of the steel strands directly contact the inner wall of the corrugated pipe. Due to the friction between the steel strands and the inner wall of the corrugated pipe, the installation efficiency of the steel strands is low. Therefore, an improvement has been made to a rapid installation device for box girders. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a rapid strand threading device for box girders, which overcomes the deficiencies of existing technologies and aims to solve the problem of low strand threading efficiency caused by the direct contact between the ends of the steel strands and the inner wall of the corrugated pipe during the existing strand threading construction process.

[0005] To achieve the above objectives, this application provides the following technical solution: a box girder rapid threading device, comprising a box girder body and a base, wherein a pre-embedded pipe is embedded inside the box girder body, a guide is provided inside the pre-embedded pipe, a steel strand is fixedly connected to the rear end of the guide, a groove is formed on the outer surface of the guide, a ball is rotatably connected inside the groove, a traction wheel is fixedly installed on the top of the base, a steel wire rope is wound around the outer surface of the traction wheel, one end of the steel wire rope is fixed to the traction wheel, the other end of the steel wire rope is fixedly connected to the front end of the guide, and a drive mechanism for driving the traction wheel to rotate is provided on one side of the traction wheel, the drive mechanism consisting of a reducer and a drive motor.

[0006] By adopting the above technical solution, the steel wire rope and steel strand on the traction wheel are fixedly connected by a guide. The traction wheel is driven to rotate by the cooperation between the reducer and the second drive motor, so that the guide and steel strand can be driven by the steel wire rope to pass through the inside of the box girder body along the pre-embedded pipe. During the traction process, the guide protects the inner wall of the pre-embedded pipe and the ends of the steel strand. The ball bearings help reduce the friction between the guide and the pre-embedded pipe, so that the steel strand threading construction can be completed quickly.

[0007] As a preferred technical solution of this application, the number of grooves is four, and the four grooves are evenly distributed in a circumferential array on the outer surface of the guide, and the outer wall of the ball fits against the inner wall of the pre-embedded tube.

[0008] By adopting the above technical solution, this design can reduce friction, improve the smoothness of the guide's movement, and may also support the movement of the guide relative to the pre-embedded pipe.

[0009] As a preferred technical solution of this application, the front end of the guide is fixedly connected to a connecting ring, the steel wire rope is wound and connected to the connecting ring, and the guide is fixedly connected to the steel wire rope through the connecting ring.

[0010] By adopting the above technical solution, the guide and the wire rope can be fixedly connected together by setting a connecting ring.

[0011] As a preferred technical solution of this application, the guide, ball and connecting ring are all made of stainless steel, and the outer surface of the ball is polished.

[0012] By adopting the above technical solutions, the guides, balls and connecting rings made of stainless steel are highly corrosion resistant, not easily damaged, and have a long service life. The outer surface of the balls is polished to further reduce friction.

[0013] As a preferred technical solution of this application, a guide unit is fixedly installed on the upper surface of the base on one side of the traction wheel. The guide unit includes a positioning frame fixedly installed on the base. A lead screw is rotatably connected inside the positioning frame. A drive motor for driving the lead screw to rotate is fixedly installed on the side wall of the positioning frame. A guide block is threaded onto the outer surface of the lead screw. A circular hole for the steel wire rope to pass through is opened through the inside of the guide block.

[0014] By adopting the above technical solution, the screw is driven to rotate by the drive motor. Since the screw is threadedly connected to the guide block, when the screw rotates, the guide block can move back and forth inside the positioning frame along the axis of the screw. Thus, the movement of the wire rope can be guided by the cooperation between the guide block and the round hole, so that the wire rope can be evenly wound on the traction wheel.

[0015] As a preferred technical solution of this application, a guide rod is slidably inserted into the inside of the guide block above the circular hole, and both ends of the guide rod are fixedly installed inside the positioning frame.

[0016] By adopting the above technical solution, the guide rod restricts and guides the movement of the guide block, ensuring that the guide block can move along a predetermined trajectory.

[0017] As a preferred technical solution of this application, a fixing seat is fixedly installed on the upper surface of the base, and the top of the fixing seat is in contact with the bottom of the second drive motor.

[0018] By adopting the above technical solution, the fixed seat plays a role in limiting and fixing, ensuring that the second drive motor will not shake and cause positional deviation during operation, thus ensuring the stability of the second drive motor during operation.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this utility model, the steel wire rope and steel strand on the traction wheel are fixedly connected by a guide. The traction wheel is driven to rotate by the cooperation between the reducer and the second drive motor, so that the guide and steel strand can be driven by the steel wire rope to pass through the inside of the box girder body along the pre-embedded pipe. During the traction process, the guide protects the inner wall of the pre-embedded pipe and the end of the steel strand. The ball bearings help to reduce the friction between the guide and the pre-embedded pipe, so that the steel strand threading construction can be completed quickly.

[0020] 2. In this utility model, the lead screw is driven to rotate by a drive motor. Since the lead screw is threadedly connected to the guide block, when the lead screw rotates, the guide block can move back and forth inside the positioning frame along the axis of the lead screw. The movement of the guide block is restricted and guided by a guide rod, so that the movement of the wire rope can be guided by the cooperation between the guide block and the round hole, so that the wire rope can be evenly wound on the traction wheel.

[0021] With reference to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereto. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a complete structural diagram of the guide component of this application; Figure 3 This is a partial structural diagram of this application; Figure 4 This is a schematic diagram of the composition structure of the guidance unit of this application.

[0023] In the diagram: 1. Box girder main body; 2. Embedded pipe; 3. Guide component; 4. Steel strand; 5. Connecting ring; 6. Groove; 7. Ball bearing; 8. Base; 9. Guide unit; 91. Positioning frame; 92. Guide rod; 93. Lead screw; 94. Drive motor one; 95. Guide block; 96. Round hole; 10. Traction wheel; 11. Steel wire rope; 12. Reducer; 13. Drive motor two; 14. Fixed seat. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] like Figure 1 - Figure 4 As shown, this embodiment provides a rapid beam threading device for box girders, including a box girder body 1 and a base 8. An embedded pipe 2 is installed inside the box girder body 1, and a guide 3 is installed inside the embedded pipe 2. A steel strand 4 is fixedly connected to the rear end of the guide 3. A groove 6 is formed on the outer surface of the guide 3, and a ball bearing 7 is rotatably connected inside the groove 6. A traction wheel 10 is fixedly installed on the top of the base 8. A steel wire rope 11 is wound around the outer surface of the traction wheel 10. One end of the steel wire rope 11 is fixed to the traction wheel 10, and the other end is fixedly connected to the front end of the guide 3. A drive mechanism for rotating the traction wheel 10 is provided on one side of the traction wheel 10. The drive mechanism consists of a reducer 12 and a drive motor 13. In use, the guide 3 is used to fix the wire rope 11 on the traction wheel 10 to the steel strand 4. The reducer 12 and the drive motor 13 work together to drive the traction wheel 10 to rotate, so that the wire rope 11 can drive the guide 3 and the steel strand 4 to pass through the pre-embedded pipe 2 from the inside of the box girder body 1. During the traction process, the guide 3 protects the inner wall of the pre-embedded pipe 2 and the end of the steel strand 4. The ball bearings 7 help to reduce the friction between the guide 3 and the pre-embedded pipe 2, so that the stranding construction of the steel strand 4 can be completed quickly.

[0026] In this embodiment, as Figure 1 and 2 As shown, there are four grooves 6, and the four grooves 6 are evenly distributed in a circumferential array on the outer surface of the guide 3. The outer wall of the ball 7 fits against the inner wall of the pre-embedded pipe 2. In use, this design can reduce friction and improve the smoothness of the movement of the guide 3. It may also support the movement of the guide 3 relative to the pre-embedded pipe 2.

[0027] In this embodiment, as Figure 1 and 2As shown, a connecting ring 5 is fixedly connected to the front end of the guide 3, and the steel wire rope 11 is wound and connected to the connecting ring 5. The guide 3 is fixedly connected to the steel wire rope 11 through the connecting ring 5. In use, the connecting ring 5 is set so that the guide 3 and the steel wire rope 11 can be fixedly connected together.

[0028] In this embodiment, as Figure 1 and 2 As shown, the guide 3, ball 7 and connecting ring 5 are all made of stainless steel, and the outer surface of the ball 7 is polished. When in use, the guide 3, ball 7 and connecting ring 5 made of stainless steel are highly corrosion resistant, not easily damaged, and have a long service life. The polishing treatment of the outer surface of the ball 7 can further reduce friction.

[0029] In this embodiment, as Figure 3 and 4 As shown, a guide unit 9 is fixedly installed on the upper surface of the base 8 on one side of the traction wheel 10. The guide unit 9 includes a positioning frame 91 fixedly installed on the base 8. A lead screw 93 is rotatably connected inside the positioning frame 91. A drive motor 94 for driving the lead screw 93 to rotate is fixedly installed on the side wall of the positioning frame 91. A guide block 95 is threaded onto the outer surface of the lead screw 93. A circular hole 96 for the wire rope 11 to pass through is opened through the inside of the guide block 95. In use, the lead screw 93 is driven to rotate by the drive motor 94. Since the lead screw 93 is threadedly connected to the guide block 95, when the lead screw 93 rotates, the guide block 95 can move back and forth inside the positioning frame 91 along the axial direction of the lead screw 93. Thus, the movement of the wire rope 11 can be guided by the cooperation between the guide block 95 and the circular hole 96, so that the wire rope 11 can be evenly wound on the traction wheel 10.

[0030] In this embodiment, as Figure 3 and 4 As shown, a guide rod 92 is slidably inserted into the inside of the guide block 95 above the circular hole 96. Both ends of the guide rod 92 are fixedly installed inside the positioning frame 91. In use, the guide rod 92 restricts and guides the movement of the guide block 95 to ensure that the guide block 95 can move along a predetermined trajectory.

[0031] In this embodiment, as Figure 1 and 3 As shown, a fixing seat 14 is fixedly installed on the upper surface of the base 8. The top of the fixing seat 14 is in contact with the bottom of the drive motor 13. During use, the fixing seat 14 plays a limiting and fixing role, ensuring that the drive motor 13 will not shake and cause position displacement during operation, and ensuring the stability of the drive motor 13 during operation.

[0032] The working principle of this utility model is as follows: When using the box girder quick threading device of this application, the steel wire rope 11 on the traction wheel 10 is fixedly connected to the steel strand 4 by setting the guide 3. The traction wheel 10 is driven to rotate by the cooperation between the reducer 12 and the drive motor 13, so that the guide 3 and the steel strand 4 can pass through the inside of the box girder body 1 along the pre-embedded pipe 2 by the steel wire rope 11. The movement of the steel wire rope 11 is guided by the guide unit 9, so that the steel wire rope 11 can be evenly wound on the traction wheel 10. During the traction process, the guide 3 protects the inner wall of the pre-embedded pipe 2 and the end of the steel strand 4. The ball bearing 7 helps to reduce the friction between the guide 3 and the pre-embedded pipe 2, so that the threading construction of the steel strand 4 can be completed quickly.

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. A rapid beam threading device for box girders, comprising a box girder body (1) and a base (8), characterized in that, The box girder body (1) is internally embedded with a pre-embedded pipe (2), and a guide (3) is provided inside the pre-embedded pipe (2). A steel strand (4) is fixedly connected to the rear end of the guide (3). A groove (6) is opened on the outer surface of the guide (3). A ball (7) is rotatably connected inside the groove (6). A traction wheel (10) is fixedly installed on the top of the base (8). A steel wire rope (11) is wound around the outer surface of the traction wheel (10). One end of the steel wire rope (11) is fixed on the traction wheel (10), and the other end of the steel wire rope (11) is fixedly connected to the front end of the guide (3). A drive mechanism for driving the traction wheel (10) to rotate is provided on one side of the traction wheel (10). The drive mechanism consists of a reducer (12) and a second drive motor (13).

2. The rapid beam threading device for box girders according to claim 1, characterized in that, The number of grooves (6) is four, and the four grooves (6) are evenly distributed in a circumferential array on the outer surface of the guide (3). The outer wall of the ball (7) is in contact with the inner wall of the pre-embedded pipe (2).

3. The rapid beam threading device for box girders according to claim 1, characterized in that, The front end of the guide (3) is fixedly connected to a connecting ring (5), and the steel wire rope (11) is wound and connected to the connecting ring (5). The guide (3) is fixedly connected to the steel wire rope (11) through the connecting ring (5).

4. The rapid beam threading device for box girders according to claim 3, characterized in that, The guide (3), ball (7) and connecting ring (5) are all made of stainless steel, and the outer surface of the ball (7) is polished.

5. The rapid beam threading device for box girders according to claim 1, characterized in that, A guide unit (9) is fixedly installed on the upper surface of the base (8) on one side of the traction wheel (10). The guide unit (9) includes a positioning frame (91) fixedly installed on the base (8). A lead screw (93) is rotatably connected inside the positioning frame (91). A drive motor (94) for driving the lead screw (93) to rotate is fixedly installed on the side wall of the positioning frame (91). A guide block (95) is threaded onto the outer surface of the lead screw (93). A circular hole (96) for the steel wire rope (11) to pass through is opened through the inside of the guide block (95).

6. The rapid beam threading device for box girders according to claim 5, characterized in that, The guide block (95) has a guide rod (92) slidably inserted above the circular hole (96) inside, and both ends of the guide rod (92) are fixedly installed inside the positioning frame (91).

7. The rapid beam threading device for box girders according to claim 1, characterized in that, A fixing seat (14) is fixedly installed on the upper surface of the base (8), and the top of the fixing seat (14) is in contact with the bottom of the second drive motor (13).

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