A corrugated pipe positioning and welding jig for prefabricated box girder production

Abstract

The utility model relates to bridge engineering construction technical field, and disclose a corrugated pipe positioning and welding jig for prefabricated box girder production, including work table and base, and the support framework of work table bottom, work table is fixedly installed with a plurality of groups of putting frame far from the one end of support framework, a plurality of groups putting frame's inside is provided with stirrup, the both sides of putting frame all are equipped with three groups of equidistance distribution's positioning slot, and the positioning reinforcement is welded between two adjacent groups of putting frame, the top fixed mounting of base has the jig body. This corrugated pipe positioning and welding jig for prefabricated box girder production, using jig can batch production and store the stirrup containing positioning reinforcement, and the stirrup can be quickly identified through the setting of the nameplate when using, and the worker quickly identifies the stirrup of corresponding jig body through the nameplate, and it is not necessary to check the size one by one, improves work efficiency, saves the time of positioning reinforcement welding in putting frame, improves the efficiency of bottom plate steel bar binding.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering construction technology, specifically to a corrugated pipe positioning and welding jig for the production of precast box girders. Background Technology

[0002] In bridge construction, precast box girders are widely used in the superstructure construction of highway and railway bridges due to their advantages such as high structural rigidity, strong load-bearing capacity, high construction efficiency, and easy quality control. As a core component of the prestressed system of precast box girders, the quality of the corrugated pipe layout directly determines the safety, durability, and service life of the overall bridge structure, making its role in the production of precast box girders crucial.

[0003] The core function of corrugated pipes in precast box girder production is to provide precise pre-reserved channels for prestressed steel strands, specifically in three aspects: First, ensuring the effectiveness of prestress transfer. The pre-reserved channels in the corrugated pipes must possess extremely high positional accuracy and smoothness to ensure smooth subsequent strand threading and uniform tension, enabling accurate transfer of prestress to the concrete structure. This offsets the self-weight of the box girder and the load stress during operation, significantly improving the box girder's crack resistance and span adaptability. Second, providing protective isolation. Corrugated pipes prevent direct contact between prestressed steel strands and concrete, preventing strand failure due to corrosion during construction and operation, and ensuring the long-term stability of the prestressed system. Third, providing a sealed channel for grouting. The sealing performance of the corrugated pipes ensures that the cement grout is full and complete during grouting, forming a complete prestressed anchorage system, further enhancing the integrity and durability of the box girder structure. Therefore, the positioning accuracy, installation stability, and compatibility with other components of the corrugated pipes are among the core aspects of quality control in precast box girder production.

[0004] The existing corrugated pipes are exposed for a long time before the construction of precast box girder projects, which leads to a lower qualification rate of the corrugated pipe coordinates, thus affecting the acceptance results and making them less practical. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a corrugated pipe positioning and welding jig for the production of precast box girders, which can effectively solve the problems in the prior art.

[0006] The technical solution adopted by this utility model is: a corrugated pipe positioning and welding jig for precast box girder production, including a workbench and a base, and a support frame located at the bottom of the workbench. Several sets of placement frames are fixedly installed at the end of the workbench away from the support frame. The interior of the several sets of placement frames is provided with stirrups. Three sets of equally spaced positioning grooves are opened on both sides of the placement frames. Positioning steel bars are welded between adjacent sets of placement frames. The jig body is fixedly installed on the top of the base.

[0007] Preferably, the surface of the jig body is welded with several sets of equally spaced stirrups, the inside of the stirrups is provided with a corrugated pipe body, the corrugated pipe body is located above the positioning steel bar, and the outer surface of the corrugated pipe body is provided with a clamp welded to the positioning steel bar.

[0008] The above technical solution facilitates precise positioning of the corrugated pipe body by using the positioning steel bars inside the equally spaced stirrups, and fixes the corrugated pipe body with clamps to prevent displacement or twisting during concrete pouring or welding, ensuring that the position and direction of the prestressed ducts meet the design requirements, and directly improving the safety of the box girder structure.

[0009] Preferably, the jig body is symmetrically arranged with two identical sets, and a steel cage is arranged between the two sets of jig bodies. The steel cage and several sets of stirrups are staggered.

[0010] By using the above technical solution, and by setting the steel cage and several sets of stirrups in a staggered arrangement, the collision between the steel cage and the corrugated pipe positioning components can be avoided during construction, providing sufficient operating space for the installation of the steel cage, while ensuring that the positioning accuracy of the stirrups is not affected.

[0011] Preferably, each set of placement frames has a positioning groove on its outer surface, and the distance between the positioning groove and the side of the workbench of each set of placement frames increases from the middle to both sides.

[0012] The above technical solution indirectly limits the arrangement trajectory of the positioning steel bars by setting the positioning grooves at the distance between each set of placement frames and the side of the workbench, which increases from the middle to both sides. This ensures that the shape of the steel bar skeleton is consistent with the curved surface of the box girder, avoids contour deviation caused by positioning, and reduces the rectification requirements after subsequent concrete pouring.

[0013] Preferably, each set of stirrups has a label at one end, and the stirrups correspond one-to-one with the jig body according to the label.

[0014] The above technical solution allows for quick identification of stirrups by setting up signs. Workers can quickly identify the stirrups corresponding to the main body of the jig by using the signs, without having to check the dimensions one by one, thus improving work efficiency.

[0015] Preferably, the positioning steel bar is adapted to the positioning groove, and the positioning steel bar can be inserted into the positioning groove.

[0016] The above technical solution allows for the pre-fixation of the positioning steel bars by inserting them into the positioning groove. No temporary support or spot welding is required, and the operation can be carried out by a single person, enabling rapid welding of the positioning steel bars and stirrups.

[0017] Preferably, the workbench is made of angle steel and the support frame is made of channel steel.

[0018] Through the above technical solutions, the workbench made of angle steel is lightweight and high-strength, which can reduce the overall weight while ensuring the support rigidity. The support frame made of channel steel has strong resistance to bending and torsion, which can effectively distribute the load of the workbench. At the same time, angle steel and channel steel are commonly used steel materials in construction engineering, which are convenient to purchase, inexpensive, and easy to cut and weld.

[0019] Compared with the prior art, this utility model provides a corrugated pipe positioning and welding jig for the production of precast box girders, which has the following advantages: 1. The corrugated pipe positioning welding jig used for the production of precast box girders allows for the batch production and storage of stirrups containing positioning steel bars. When in use, the stirrups can be quickly identified by setting up labels. Workers can quickly identify the stirrups corresponding to the jig body by using the labels, without having to check the dimensions one by one, thus improving work efficiency, saving the time of welding positioning steel bars in the placement frame, and improving the efficiency of bottom plate steel bar binding. 2. The corrugated pipe positioning welding jig used in the production of the precast box girder has a fixed positioning slot pre-cut according to the position of the positioning reinforcement, which makes the positioning of the corrugated pipe reinforcement more accurate. By setting the positioning slots at the distance between each set of placement frames and the side of the workbench, the distance from the middle position increases from the middle to both sides, which indirectly limits the arrangement trajectory of the positioning reinforcement, ensuring that the shape of the reinforcement skeleton is consistent with the curved surface of the box girder, avoiding contour deviation caused by positioning, and reducing the rectification requirements after subsequent concrete pouring. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a three-dimensional structural diagram of the stirrup of this utility model; Figure 4 This is a schematic diagram of the installation structure of the placement frame of this utility model; Figure 5 This is a schematic diagram of the installation structure of the stirrups and the frame body of this utility model; Figure 6 This utility model Figure 2 A magnified structural diagram of point A in the middle.

[0021] The components include: 1. Workbench; 2. Support frame; 3. Placement frame; 4. Stirrups; 5. Sign; 6. Positioning groove; 7. Positioning steel bar; 8. Base; 9. Frame body; 10. Corrugated pipe body; 11. Clamp; 12. Steel cage. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: As Figure 1-6 As shown, the present invention provides a corrugated pipe positioning and welding jig for the production of precast box girders, including a workbench 1 and a base 8, and a support frame 2 located at the bottom of the workbench 1. Several sets of placement frames 3 are fixedly installed at the end of the workbench 1 away from the support frame 2. The interior of the several sets of placement frames 3 is provided with stirrups 4. Three sets of equally spaced positioning grooves 6 are opened on both sides of the placement frames 3. Positioning steel bars 7 are welded between two adjacent sets of placement frames 3. The jig body 9 is fixedly installed on the top of the base 8.

[0024] Specifically, the surface of the jig body 9 is welded with several sets of equally spaced stirrups 4. A corrugated pipe body 10 is installed inside the stirrups 4, positioned above the positioning reinforcement 7. The outer surface of the corrugated pipe body 10 is fitted with clamps 11 welded to the positioning reinforcement 7. The advantage is that the positioning reinforcement 7 inside the equally spaced stirrups 4 facilitates precise positioning of the corrugated pipe body 10, and the clamps 11 fix the corrugated pipe body 10, preventing displacement or twisting during concrete pouring or welding. This ensures that the position and orientation of the prestressed ducts meet design requirements, directly improving the safety of the box girder structure.

[0025] Specifically, the jig body 9 has two identical sets symmetrically arranged, with a reinforcing cage 12 placed between the two sets of jig bodies 9. The reinforcing cage 12 and several sets of stirrups 4 are staggered. The advantage is that by setting the reinforcing cage 12 and several sets of stirrups 4 in a staggered arrangement, the collision between the reinforcing cage and the corrugated pipe positioning component can be avoided during construction, providing sufficient operating space for the installation of the reinforcing cage 12, while ensuring that the positioning accuracy of the stirrups 4 is not affected.

[0026] Specifically, positioning grooves 6 are provided on the outer surface of each set of placement frames 3. The distance between the positioning grooves 6 and the side of the workbench 1 of each set of placement frames 3 increases progressively from the center outwards. The advantage is that by setting the positioning grooves 6 to increase progressively from the center outwards from the center of each set of placement frames 3 and the side of the workbench 1, the arrangement trajectory of the positioning reinforcement 7 is indirectly limited, ensuring that the shape of the reinforcement skeleton is consistent with the curved surface of the box girder, avoiding contour deviations caused by positioning, and reducing the need for subsequent corrections after concrete pouring.

[0027] Example 2: Figure 2-6As shown, this is an improvement on the previous embodiment.

[0028] Specifically, each set of stirrups 4 has a label 5 at one end, and each stirrup 4 corresponds to the jig body 9 according to the label 5. The advantage is that the stirrups 4 can be quickly identified by setting the label 5. Workers can quickly identify the stirrups 4 corresponding to the jig body 9 by using the label 5, without having to check the dimensions one by one, thus improving work efficiency.

[0029] Specifically, the positioning steel bar 7 is compatible with the positioning groove 6, and the positioning steel bar 7 can be inserted into the positioning groove 6. The advantage is that by inserting the positioning steel bar 7 into the positioning groove 6, the positioning steel bar 7 can be pre-fixed without temporary support or spot welding positioning, and can be operated by a single person, realizing the rapid welding of the positioning steel bar 7 and the stirrup 4.

[0030] Specifically, the workbench 1 is made of angle steel, and the support frame 2 is made of channel steel. The advantages are that the workbench 1 made of angle steel is lightweight and high-strength, which can reduce the overall weight while ensuring the support rigidity. The support frame 2 made of channel steel has strong resistance to bending and torsion, which can effectively distribute the load of the workbench 1. At the same time, angle steel and channel steel are both commonly used steel materials in construction engineering, which are convenient to purchase, inexpensive, and easy to cut and weld.

[0031] Working principle: In use, firstly, a placement frame 3 for the stirrup 4 is made according to the width of the stirrup 4. Then, the stirrup 4 is placed in the placement frame 3. The positioning steel bar 7 can be inserted into the positioning groove 6, which can achieve pre-fixation of the positioning steel bar 7. No temporary support or spot welding is required for positioning. It can be operated by a single person, realizing the rapid welding of the positioning steel bar 7 and the stirrup 4. By setting the positioning groove 6 to be located at the distance between each group of placement frames 3 and the side of the workbench 1, the distance from the middle position increases from the middle to both sides, which indirectly limits the arrangement trajectory of the positioning steel bar 7, ensuring that the shape of the steel bar skeleton is consistent with the curved surface of the box girder, and avoiding positioning guide To minimize contour deviations and reduce subsequent rectification requirements after concrete pouring, the stirrups 4 of the positioning steel bars 7 at different heights can be quickly identified by setting up the sign 5. Workers can quickly identify the corresponding stirrups 4 of the jig body 9 through the sign 5 without having to check the dimensions one by one, thus improving work efficiency. The positioning steel bars 7 inside the stirrups 4 are distributed at equal intervals, which facilitates the precise positioning of the corrugated pipe body 10. The corrugated pipe body 10 is fixed by the clamp 11 to prevent displacement or twisting during concrete pouring or welding, ensuring that the position and direction of the prestressed ducts meet the design requirements, and directly improving the safety of the box girder structure.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrugated pipe positioning and welding jig for precast box girder production, comprising a workbench (1) and a base (8), and a support frame (2) located at the bottom of the workbench (1), characterized in that: The workbench (1) has several sets of placement frames (3) fixedly installed at one end away from the support frame (2). The placement frames (3) are provided with stirrups (4). Three sets of equally spaced positioning slots (6) are opened on both sides of the placement frames (3). Positioning steel bars (7) are welded between two adjacent sets of placement frames (3). The base (8) has a jig body (9) fixedly installed on the top.

2. The corrugated pipe positioning and welding jig for precast box girder production according to claim 1, characterized in that: The surface of the frame body (9) is welded with several sets of equally spaced stirrups (4), and a corrugated pipe body (10) is provided inside the stirrups (4). The corrugated pipe body (10) is located above the positioning steel bar (7), and a clamp (11) welded to the positioning steel bar (7) is provided on the outer surface of the corrugated pipe body (10).

3. The corrugated pipe positioning and welding jig for precast box girder production according to claim 1, characterized in that: The frame body (9) is symmetrically arranged with two identical sets, and a steel cage (12) is arranged between the two sets of frame bodies (9). The steel cage (12) and several sets of stirrups (4) are staggered.

4. The corrugated pipe positioning and welding jig for precast box girder production according to claim 1, characterized in that: Each set of placement frames (3) has a positioning groove (6) on its outer surface. The distance between the positioning groove (6) and the side of the workbench (1) of each set of placement frames (3) increases from the middle to both sides.

5. The corrugated pipe positioning and welding jig for precast box girder production according to claim 1, characterized in that: Each set of stirrups (4) has a nameplate (5) at one end, and the stirrups (4) correspond one-to-one with the frame body (9) according to the nameplate (5).

6. The corrugated pipe positioning and welding jig for precast box girder production according to claim 1, characterized in that: The positioning steel bar (7) is adapted to the positioning groove (6), and the positioning steel bar (7) can be inserted into the positioning groove (6).

7. The corrugated pipe positioning and welding jig for precast box girder production according to claim 1, characterized in that: The workbench (1) is made of angle steel, and the support frame (2) is made of channel steel.

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