A positioning device for prestressed corrugated pipe in box girder

Abstract

The utility model discloses a positioning device of box girder inner prestress bellows, including support frame, pulley, downpipe, hinged seat and locating reinforcement, the left and right ends of support frame are on the box girder mould, the top of reinforcement cage, two pulleys are spaced apart and are connected in the bottom and the outside of support frame, the left and right sides above reinforcement cage, four downpipes are symmetrically located in the left and right sides of reinforcement cage, and the top end of each downpipe is fixedly connected with the bottom end of a hinged seat, and the bottom of pulley is hinged with the top end of hinged seat, and locating reinforcement is inserted into the downpipe of the left and right sides of reinforcement cage to support the bellows in reinforcement cage. The utility model has the advantages of: 1, by the left and right ends of support frame are on the box girder mould, then only need to move pulley to the designated position and downpipe, and then insert locating reinforcement, can quickly establish the stable support to bellows, 2, can support multiple bellows at one time, and the operation is simple and convenient, and the construction efficiency is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary support technology, specifically to a positioning device for prestressed corrugated pipes inside a box girder. Background Technology

[0002] In post-tensioned prestressed concrete construction, corrugated pipes are used to form pre-reserved ducts to facilitate the insertion of prestressed steel bars and subsequent tensioning operations. These pre-reserved ducts are crucial for the successful installation and application of prestressing tendons. Currently, precast box girders are typically tens of meters long. Inserting corrugated pipes into the steel cage can cause them to sag, necessitating repositioning and support after insertion. Current methods primarily rely on workers manually measuring and tying the supports. Given the length of the corrugated pipes and the numerous support points required, manual measurement is both labor-intensive and time-consuming.

[0003] Therefore, to address the above shortcomings, it is necessary to develop a positioning device for prestressed corrugated pipes inside box girders. Summary of the Invention

[0004] The purpose of this utility model is to provide a positioning device for prestressed corrugated pipes inside a box girder.

[0005] The purpose of this utility model is achieved as follows:

[0006] A positioning device for prestressed corrugated pipes inside a box girder is characterized by comprising a support frame, trolleys, vertical pipes, hinged seats, and positioning reinforcing bars. The left and right ends of the support frame rest on the box girder mold and above the reinforcing cage. Two trolleys are slidably connected at intervals to the bottom and outer sides of the support frame and the left and right sides above the reinforcing cage. Four vertical pipes arranged in a rectangular pattern are symmetrically positioned in pairs on the left and right sides of the reinforcing cage. The top end of each vertical pipe is fixedly connected to the bottom end of a hinged seat. The front and rear ends of the bottom of each trolley are hinged to the top end of a hinged seat. The positioning reinforcing bars are inserted into the vertical pipes on the left and right sides of the reinforcing cage to support the corrugated pipes inside the reinforcing cage.

[0007] As a further explanation of this utility model, preferably, the support frame is an I-beam structure, the trolley is a U-shaped structure, and wheels are rotatably connected to the two opposite inner sidewalls of the upward opening end of the trolley, with the wheels abutting against the outer sidewall of the support frame.

[0008] As a further explanation of this utility model, preferably, the distance between the bottom of the trolley and the top of the reinforcing cage is greater than the sum of the length of the hinge seat and the outer diameter of the vertical tube after it is rotated to the horizontal position.

[0009] As a further explanation of this utility model, preferably, the plumb line is a circular tube structure. Several positioning steel bar holes are provided at intervals on the side wall of each plumb line, which are on the same vertical line and penetrate the left and right side walls of the plumb line. The diameter of the positioning steel bar holes is larger than the diameter of the positioning steel bar. A positioning steel bar is inserted into two positioning steel bar holes on the same horizontal line of two adjacent plumb lines on both sides of the steel cage. The positioning steel bar is located below the corrugated pipe to support the corrugated pipe.

[0010] As a further explanation of this utility model, preferably, the hinge seat is composed of a base and a hinge rod that are integrated into one piece. The hinge rod is vertically fixed to the middle of the top of the cylindrical base. A positioning rod is hinged to one side of the top of the base. The positioning rod is a plate-shaped rod. Two parallel hinge arms are provided at the bottom of the trolley. The top of the hinge rod is inserted into the two hinge arms and connected together by a pin. A positioning groove with a downward opening and the same width as the positioning rod is provided on the hinge arm on the same side of the positioning rod. The top of the positioning rod can be embedded in the positioning groove to make the length direction of the vertical tube vertical.

[0011] As a further explanation of this utility model, preferably, the diameter of the base is greater than the distance between the outer walls of the two hinged arms, so that the angle between the length direction of the positioning rod that is obliquely embedded in the positioning groove and the horizontal plane near the trolley is an acute angle, that is, the positioning rod forms the hypotenuse of a triangle.

[0012] As a further explanation of this utility model, preferably, after the vertical tube and the hinge seat are rotated along the hinge point until the vertical tube is parallel to the support frame, the vertical tube and the support frame are fixed together with cable ties.

[0013] This utility model has the following advantages:

[0014] 1. By placing the left and right ends of the support frame on the box girder mold, the positioning device can be quickly built. Then, simply move the trolley to the designated position and lower the drop pipe, and then insert the positioning steel bar to quickly establish stable support for the corrugated pipe.

[0015] 2. It can support multiple corrugated pipes at once, making the operation simple and convenient, and significantly improving construction efficiency. Attached Figure Description

[0016] Figure 1 This is an assembly rendering of the present invention;

[0017] Figure 2 This is a side view of the present invention;

[0018] Figure 3 yes Figure 2 Enlarged view of A in the middle;

[0019] In the diagram: 1. Support frame; 2. Pulley; 21. Wheel; 22. Hinge arm; 23. Positioning groove; 3. Vertical tube; 31. Positioning rebar hole; 4. Hinge seat; 41. Positioning rod; 42. Base; 43. Hinge rod; 5. Positioning rebar; 6. Rebar cage; 7. Corrugated pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] A positioning device for prestressed corrugated pipes in a box girder includes a support frame 1, trolleys 2, vertical pipes 3, hinge seats 4, and positioning steel bars 5. The left and right ends of the support frame 1 rest on the box girder mold and above the reinforcing cage 6. Two trolleys 2 are slidably connected at intervals to the bottom and outer sides of the support frame 1 and the left and right sides above the reinforcing cage 6. Four vertical pipes 3 arranged in a rectangle are symmetrically located in pairs on the left and right sides of the reinforcing cage 6. The top end of each vertical pipe 3 is fixedly connected to the bottom end of a hinge seat 4. The front and rear ends of the bottom of each trolley 2 are hinged to the top end of a hinge seat 4. The positioning steel bars 5 are inserted into the vertical pipes 3 on the left and right sides of the reinforcing cage 6 to support the corrugated pipes 7 inside the reinforcing cage 6.

[0022] The support frame 1 is an I-beam structure. The length of the support frame 1 is the width of the box girder. It is preferable to place the support frame 1 on the box girder mold after raising it.

[0023] The trolley 2 has a U-shaped structure, and wheels 21 are rotatably connected to the two opposite inner side walls of the upward opening end of the trolley 2. The wheels 21 abut against the outer side wall of the support frame 1 so that the trolley 2 and the support frame 1 can move smoothly. The distance between the bottom of the trolley 2 and the top of the steel cage 6 is greater than the sum of the length of the hinge seat 4 and the outer diameter of the vertical tube 3 after it is rotated to the horizontal position. This can prevent interference with the steel cage 6 when moving the trolley 2 and the vertical tube 3.

[0024] The vertical tube 3 is a circular tube structure. Several positioning steel bar holes 31 are provided at intervals on the side wall of each vertical tube 3, which are on the same vertical line and penetrate the left and right side walls of the vertical tube 3. The diameter of the positioning steel bar hole 31 is larger than the diameter of the positioning steel bar 5. A positioning steel bar 5 is inserted into the two positioning steel bar holes 31 on the same horizontal line of the two adjacent vertical tubes 3 on both sides of the steel cage 6. The positioning steel bar 5 is located below the corrugated pipe 7 to support the corrugated pipe 7.

[0025] The vertical tube 3 and the hinge seat 4 are rotated along the hinge point until the vertical tube 3 is parallel to the support frame 1. The vertical tube 3 and the support frame 1 are fixed together with cable ties. At this time, the movable trolley 2 can move the vertical tube 3 to the designated position.

[0026] The hinge seat 4 consists of an integral base 42 and a hinge rod 43. The hinge rod 43 is vertically fixed to the top center of the cylindrical base 42. A positioning rod 41, which is a plate-shaped rod, is hinged to one side of the top of the base 42. Two parallel hinge arms 22 are provided at the bottom of the trolley 2. The top of the hinge rod 43 is inserted into the two hinge arms 22 and connected together by a pin. A downward-opening positioning groove 23, the same width as the positioning rod 41, is provided on the hinge arm 22 on the same side as the positioning rod 41. The top end can be embedded in the positioning groove 23 to make the length direction of the vertical tube 3 vertical. The positioning rod 41 can limit the swing of the vertical tube 3 so that the positioning steel bar 5 can be inserted later. The diameter of the base 42 is greater than the distance between the outer walls of the two hinge arms 22, so that the length direction of the positioning rod 41 that is embedded obliquely in the positioning groove 23 makes an acute angle with the horizontal plane near the trolley 2. That is, the positioning rod 41 forms the hypotenuse of the triangle, which can prevent the positioning rod 41 from disengaging from the positioning groove 23 on the trolley 2 when it is vibrated, so as to ensure the stable positioning of the vertical tube 3.

[0027] Working principle:

[0028] A. After the corrugated pipe 7 is inserted into the reinforcing cage 6, the support frame 1 is placed on top of the box girder formwork, and the trolley 2 is pushed to move towards the corrugated pipe 7 that needs to be positioned. The trolley 2 is equipped with wheels 21. Since the vertical pipe 3 is hinged to the trolley 2 through the hinge seat 4, when the trolley 2 moves, the vertical pipe 3 can be rotated upward to be in the same direction as the length of the support frame 1. Then, one or two steel wires are passed through the positioning steel bar holes 31 on the vertical pipe 3 and tied to the support frame 1 so that the steel wires can move together with the trolley 2 and the vertical pipe 3, so as to prevent other reinforcing cages 6 from interfering with the movement of the vertical pipe 3.

[0029] B. After moving to the designated position, remove the steel wire to allow the vertical tube 3 to hang down naturally. Then, bend the positioning rod 41 on the hinge seat 4 upwards and insert it into the positioning groove 23 at the hinge position of the trolley 2, so that the vertical tube 3 can remain vertical. The positioning rod 41 is inserted at an angle into the positioning groove 23 at the hinge position of the trolley 2, forming a triangle with the vertical plane, making it less likely to detach from the trolley 2 and providing stable positioning for the vertical tube 3.

[0030] C. Several positioning steel bar holes 31 are provided at intervals on the side wall of each vertical pipe 3. According to actual needs, the positioning steel bar 5 is inserted into the positioning steel bar hole 31 at the required height from the outside to the inside. Then, the positioning steel bar 5 extending out of one end of the vertical pipe 3 is inserted into the steel cage 6. Other workers lift the corrugated pipe 7 that needs to be supported, and then the positioning steel bar 5 is inserted under the corrugated pipe 7. Then, the workers on the other side of the steel cage 6 pull out the positioning steel bar 5 and insert it into the vertical pipe 3 on the other side.

[0031] D. Finally, tie the positioning steel bar 5 to the steel cage 6, remove the support frame 1, pulley 2, vertical pipe 3, and hinge seat 4 to complete the positioning.

[0032] This method allows for the rapid establishment of stable supports, and can support multiple corrugated pipes at once. It is simple to operate and significantly improves construction efficiency.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A positioning device for prestressed corrugated pipes inside a box girder, characterized in that: The system includes a support frame, pulleys, vertical pipes, hinged seats, and positioning reinforcement bars. The left and right ends of the support frame rest on the box girder mold and above the reinforcement cage. Two pulleys are slidably connected at intervals to the bottom and outer sides of the support frame and the left and right sides above the reinforcement cage. Four vertical pipes arranged in a rectangle are symmetrically located on the left and right sides of the reinforcement cage in pairs. The top of each vertical pipe is fixedly connected to the bottom of a hinged seat. The front and rear ends of the bottom of each pulley are hinged to the top of a hinged seat. Positioning reinforcement bars are inserted into the vertical pipes on the left and right sides of the reinforcement cage to support the corrugated pipes inside the reinforcement cage.

2. The positioning device for the prestressed corrugated pipe inside the box girder according to claim 1, characterized in that: The support frame is an I-beam structure, the trolley is a U-shaped structure, and wheels are rotatably connected to the two opposite inner side walls of the upward opening end of the trolley. The wheels abut against the outer side wall of the support frame.

3. The positioning device for the prestressed corrugated pipe inside the box girder according to claim 1, characterized in that: The distance between the bottom of the pulley and the top of the reinforcing cage is greater than the sum of the length of the hinge seat and the outer diameter of the vertical tube after it has been rotated to the horizontal position.

4. The positioning device for the prestressed corrugated pipe inside the box girder according to claim 1, characterized in that: The vertical tube is a cylindrical structure. Several positioning steel bar holes are provided at intervals on the side wall of each vertical tube, which are on the same vertical line and penetrate the left and right side walls of the vertical tube. The diameter of the positioning steel bar holes is larger than the diameter of the positioning steel bar. A positioning steel bar is inserted into two positioning steel bar holes on the same horizontal line of two adjacent vertical tubes on both sides of the steel cage. The positioning steel bar is located below the corrugated pipe to support the corrugated pipe.

5. The positioning device for the prestressed corrugated pipe inside the box girder according to claim 1, characterized in that: The hinged seat consists of an integral base and a hinge rod. The hinge rod is vertically fixed to the top center of the cylindrical base. A positioning rod, which is a plate-shaped rod, is hinged to one side of the top of the base. Two parallel hinge arms are provided at the bottom of the trolley. The top of the hinge rod is inserted into the two hinge arms and connected together by a pin. A positioning groove with a downward opening and the same width as the positioning rod is provided on the hinge arm on the same side as the positioning rod. The top of the positioning rod can be inserted into the positioning groove to make the length direction of the vertical tube vertical.

6. The positioning device for the prestressed corrugated pipe inside the box girder according to claim 5, characterized in that: The diameter of the base is greater than the distance between the outer walls of the two hinged arms, so that the angle between the length direction of the positioning rod, which is obliquely embedded in the positioning groove, and the horizontal plane near the trolley is an acute angle.

7. The positioning device for the prestressed corrugated pipe inside the box girder according to claim 1, characterized in that: After the vertical tube and the hinge seat are rotated along the hinge point until the vertical tube is parallel to the support frame, the vertical tube and the support frame are fixed together with cable ties.

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