Precast beam diaphragm plate reserved steel bar positioning device

Abstract

The utility model provides a precast beam diaphragm plate reserved steel bar positioning device which effectively solves the problems that in the prior art, an included angle between a diaphragm plate reserved steel bar and the axial direction of a box girder cannot be effectively controlled, the error of the included angle between the diaphragm plate and the box girder is large, and a plurality of reserved steel bars of the diaphragm plate are not parallel to one another. According to the technical scheme, the device comprises a flat rod arranged in the front-back direction, a plurality of U-shaped clamps with downward openings are fixed to the flat rod, two vertical rectangular plates are arranged on the right side of the flat plate, swing rods are hinged to the front end and the rear end of the flat plate and can swing front and back, and the ends of the rectangular plates are hinged to the swing plates; a parallelogram structure is formed among the flat rod, the oscillating rod and the rectangular plate; a telescopic structure is arranged between the swing rod on the front side and the flat rod, and the telescopic structure stretches out and draws back to control the swing rod to swing front and back. A plurality of positioning holes are formed in the rectangular plates, and the positioning holes in the two rectangular plates correspond to each other.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering construction, in particular to a positioning device for reserved steel bars of precast beam diaphragms. Background Technique

[0002] The diaphragm is a component arranged between beams to maintain the cross-sectional shape and enhance the lateral stiffness, and it acts on the live load distributed on the bridge. Commonly used diaphragms are generally perpendicular to the axial direction of the box girder. However, in curved sections, such as the entrance of an elevated road or an overpass, the conventional diaphragms are misaligned, resulting in wavy or zigzag shapes between the cast diaphragms. Whether the connection of the diaphragms is straight directly affects the good stress of the bridge. In the prior art, a positioning device and a reserved steel bar positioning structure for box girder diaphragms disclosed in Chinese patent document CN215976809U realize the positioning of the reserved steel bars of the diaphragm by opening reserved holes 2 on the positioning plate 1. During use, the reserved steel bars pass through the reserved holes. However, since the positioning plate 1 is closely attached to the steel cage of the box girder and the reserved holes are large, the steel bars can reciprocate in the reserved holes, and actually there is little difference from the traditional fixing method. Moreover, it is difficult to ensure the parallelism between multiple steel bars in the diaphragm, resulting in a large deviation in the included angle between the cast diaphragm and the axial direction of the box girder, and the above problems cannot be fundamentally solved.

[0003] Now a positioning device for reserved steel bars of precast beam diaphragms is provided, which can ensure the parallelism between multiple reserved steel bars in the diaphragm, greatly reduce the included angle error between multiple reserved steel bars of the diaphragm and the axial direction of the box girder, and can realize the adjustability of the reserved steel bars of the diaphragm and the axial direction of the box girder. In this way, diaphragms with different inclination angles can also be cast. Summary of the Utility Model

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a positioning device for reserved steel bars of precast beam diaphragms, which effectively solves the problems that the included angle between the reserved steel bars of the diaphragm and the axial direction of the box girder in the prior art cannot be effectively controlled, the included angle error between the diaphragm and the box girder is large, and multiple reserved steel bars of the diaphragm are not parallel to each other.

[0005] The technical solution it adopts is that it includes a flat bar arranged in the front-back direction, and a plurality of U-shaped clips with openings downward are fixed on the flat bar. There are two vertical rectangular plates on the right side of the flat plate. Swing rods are hinged on the front and rear ends of the flat plate, and the swing rods can swing back and forth. The end of the rectangular plate is hinged on the swing plate; a parallelogram structure is formed among the flat bar, the swing rod and the rectangular plate; there is a telescopic structure between the swing rod at the front side and the flat bar, and the telescopic movement of the telescopic structure can control the back-and-forth swing of the swing rod; a plurality of positioning holes are arranged on the rectangular plate, and the plurality of positioning holes on the two rectangular plates correspond to each other.

[0006] Further, the telescopic structure includes a threaded cylinder. At both ends inside the cavity of the threaded cylinder, there are screw rods connected by threads. The thread directions of the two screw rods are opposite. One of the screw rods is hinged to the flat rod, and the other screw rod is hinged to the front swing rod. By screwing the threaded cylinder, the two screw rods can be moved closer to or away from each other.

[0007] Further, the telescopic structure is an electric cylinder. The cylinder body of the electric cylinder is hinged to the front end of the flat rod, and the output shaft of the electric cylinder is hinged to the swing rod. The extension or contraction of the output shaft on the electric cylinder can control the front-back swing of the swing rod.

[0008] The structure of the present utility model is ingenious, which can ensure that multiple reserved steel bars in the diaphragm are parallel to each other, can greatly reduce the angular error between multiple reserved steel bars of the diaphragm and the axial direction of the box girder, can realize the adjustability of the reserved steel bars of the diaphragm and the axial direction of the box girder, and thus can also pour diaphragms with different inclination angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the front view of the present utility model.

[0010] Figure 2 It is the top view of the present utility model.

[0011] Figure 3 It is the structural schematic diagram of the rectangular plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The following further elaborates in detail on the specific embodiments of the present utility model with reference to the accompanying drawings.

[0013] Given by Figures 1 to 3 The present utility model includes a flat rod 1 arranged in the front-back direction. A plurality of U-shaped clips 2 with openings downward are fixed on the flat rod 1. There are two vertical rectangular plates 3 on the right side of the flat plate. Swing rods 4 are hinged at the front and rear ends of the flat plate. The swing rods 4 can swing back and forth. The ends of the rectangular plates 3 are hinged to the swing plates. A parallelogram structure is formed among the flat rod 1, the swing rods 4, and the rectangular plates 3. There is a telescopic structure 5 between the front swing rod and the flat rod 1. The expansion and contraction of the telescopic structure 5 can control the front-back swing of the swing rod. A plurality of positioning holes 6 are provided on the rectangular plates 3, and the plurality of positioning holes 6 on the two rectangular plates 3 correspond to each other.

[0014] In order to adjust the angle between the reserved steel bars of the diaphragm and the axial direction of the box girder, the telescopic structure 5 includes a threaded cylinder 7. At both ends inside the cavity of the threaded cylinder 7, there are screw rods 8 connected by threads. The thread directions of the two screw rods 8 are opposite. One of the screw rods 8 is hinged to the flat rod 1, and the other screw rod 8 is hinged to the front swing rod. By screwing the threaded cylinder 7, the two screw rods 8 can be moved closer to or away from each other.

[0015] In order to facilitate the adjustment of the angle of the reserved steel bars of the diaphragm, the telescopic structure 5 is an electric cylinder. The cylinder body of the electric cylinder is hinged to the front end of the flat rod 1, and the output shaft of the electric cylinder is hinged to the swing rod; the extension or contraction of the output shaft on the electric cylinder can control the front and back swing of the swing rod.

[0016] It should be noted that in this solution, the function of the U-shaped clamp 2 is to penetrate and fix the device on the steel cage of the box girder; a plurality of positioning holes 6 are opened on each of the two rectangular plates 3 in the device, and the positioning holes 6 on the two rectangular plates 3 correspond one by one. In this way, according to the basic principle that two points determine a straight line, it is only necessary to pass the reserved steel bars of the diaphragm through the corresponding positioning holes 6 on the two rectangular plates 3 in turn.

[0017] During use, insert the U-shaped clamp 2 of the device into the steel cage on the side of the box girder, and make the flat rod 1 parallel to the axial direction of the box girder. Then, adjust the telescopic structure 5 according to the design requirements. The telescopic structure 5 drives the swing rod to swing back and forth. When the included angle between the swing rod and the flat rod 1 reaches the design angle, it is only necessary to pass the steel bars through the corresponding positioning holes 6 on the two rectangular plates 3 from right to left in turn to complete the positioning, and finally fix the steel bars.

[0018] The structure of the utility model is ingenious, which can ensure that multiple reserved steel bars in the diaphragm are parallel to each other, can greatly reduce the angle error between multiple reserved steel bars of the diaphragm and the axial direction of the box girder, can realize the adjustability of the reserved steel bars of the diaphragm and the axial direction of the box girder, and thus can also pour diaphragms with different inclination angles.

Claims

1. A prefabricated beam diaphragm reserved steel bar positioning device, characterized in that: The invention comprises a flat rod (1) arranged in the front-to-back direction, a plurality of U-shaped clips (2) with downward openings are fixed on the flat rod (1), two vertical rectangular plates (3) are provided on the right side of the flat plate, swing rods (4) are hingedly connected to the front and rear ends of the flat plate, the swing rods (4) can swing forward and backward, and the ends of the rectangular plates (3) are hingedly connected to the swing plates; a parallelogram structure is formed between the flat rod (1), the swing rod (4) and the rectangular plates (3); a telescopic structure (5) is provided between the swing rod at the front side and the flat rod (1), and the telescopic structure (5) can control the swing of the swing rod forward and backward; the rectangular plates (3) are provided with a plurality of positioning holes (6), and the plurality of positioning holes (6) on the two rectangular plates (3) correspond to each other.

2. A prefabricated beam diaphragm reserved steel bar positioning device according to claim 1, characterized in that: The telescopic structure (5) comprises a threaded barrel (7), wherein screw rods (8) are connected to the two ends of the cavity of the threaded barrel (7) via threads, wherein the threads on the two screw rods (8) have opposite rotation directions, wherein one of the screw rods (8) is hingedly connected to the flat rod (1), and the other screw rod (8) is hingedly connected to the swing rod at the front side; by rotating the threaded barrel (7), the two screw rods (8) can be moved closer to or farther away from each other.

3. The device for positioning reserved steel bars for prefabricated beam diaphragms according to claim 1 is characterized in that: The telescopic structure (5) is an electric cylinder, the cylinder body of the electric cylinder is hinged to the front end of the flat rod (1), and the output shaft of the electric cylinder is hinged to the swing arm; the extension or contraction of the output shaft on the electric cylinder can control the swing arm to swing forward and backward.

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