Efficient flat bending device for hollow slab beam hinge joint embedded steel bars

Abstract

A hollow slab beam hinge joint embedded steel bar efficient flat bending device comprises a pry bar force arm, a pry hook is arranged at the front end of the pry bar force arm, an annular lifting lug is fixed to the lower end of the front portion of the pry bar force arm, the upper end of a pressure-bearing rod is rotatably installed in the annular lifting lug, and a limiting angle plate is fixed to the lower end of the pressure-bearing rod; when the prying hook is hooked into the pre-embedded annular rib, the limiting angle plate is in contact with the bent steel bar; when the pry bar force arm applies force downwards, the bent steel bar is flattened by the limiting angle plate. According to the efficient flat bending device for the hollow slab beam hinge joint embedded steel bar, the construction efficiency can be improved, and the construction difficulty can be reduced.

Description

Technical Field

[0001] The utility model relates to engineering construction equipment, in particular to a hollow slab beam hinge joint pre-embedded steel bar high-efficiency flat bending device. Background Art

[0002] In the construction of small-span bridges, the upper structure beams and slabs are usually designed as hollow slab beams. Since the hollow slab beams are thin and light in weight, in order to enhance the overall connection of the bridge deck, usually during the prefabrication of the hollow slabs, oblique annular ribs are reserved on the outside of the web, and the reinforcing ribs are set in the hinge joints to enhance the overall stability between the hollow slabs so that they can be evenly loaded. Before the hinge joint construction, the reserved annular ribs need to be flat-bent so as to overlap with the reinforcing ribs. The method usually used on site is to use heavy objects for hammering. The disadvantage of this method is that the hinge joint gap is small (the hinge joint gap is about 3 cm wide), and it is extremely easy to damage the prefabricated beams and slabs by hammering, causing the prefabricated beams and slabs to be missing edges and corners. At the same time, it is not easy to control the flat curvature of the embedded ribs by hammering with heavy objects, which can easily cause excessive flat bending, resulting in the inability to overlap with the reinforcing ribs later, or insufficient flat bending, resulting in the inability to fully insert the reinforcing ribs. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a high-efficiency flat bending device for pre-embedded steel bars in the hinged joints of hollow slab beams. The device has a simple structure and is easy to operate. It can replace the conventional hammering construction method, thereby improving the construction efficiency and reducing the construction difficulty. At the same time, it also plays a certain role in protecting the finished products of prefabricated beams and slabs during the hinged joint construction process.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A high-efficiency flat bending device for embedded steel bars in hinged joints of hollow slab beams comprises a pry bar arm, a pry hook is provided at the front end of the pry bar arm, an annular lifting ear is fixed at the front lower end of the pry bar arm, the upper end of a pressure-bearing rod is rotatably mounted in the annular lifting ear, and a limiting angle plate is fixed at the lower end; when the pry hook is hooked into the embedded annular reinforcement, the limiting angle plate contacts the bending reinforcement; when the pry bar arm applies force downward, the limiting angle plate flattens the bending reinforcement.

[0006] The lever arm is formed by integrally bending an operating rod and a connecting rod, and an angle between the operating rod and the connecting rod is greater than 90 degrees and less than 180 degrees.

[0007] A rubber handle is provided on the operating rod.

[0008] The pressure-bearing rod comprises a pressure-bearing rod fixing section, and the pressure-bearing rod fixing section is threadedly connected with the pressure-bearing rod adjusting section through a connecting sleeve.

[0009] The utility model provides a hollow slab beam hinge joint embedded steel bar high-efficiency flat bending device, which has the following technical effects:

[0010] 1) This device can realize the flat bending construction of steel bars in narrow gaps, avoiding the quality damage to prefabricated beams and slabs caused by traditional hammering construction, and plays a certain role in protecting the finished products of important main structures.

[0011] 2) With the help of the existing embedded annular reinforcement and through the principle of lever, this device can strictly control the curvature of the bent steel bars during the force application process, thereby avoiding various reworks caused by the curvature not meeting the requirements in traditional construction, greatly improving the construction efficiency.

[0012] 3) By using a connecting sleeve to connect the pressure rod adjustment section, the rod length can be adjusted according to the depth of the embedded reinforcement in the hinged joint during the construction process, thereby adapting to the flat bending construction of the embedded reinforcement in the hinged joint under different conditions.

[0013] 4) By setting the limiting angle plate, it can make large-area contact and limit with the bent steel bar, so as to achieve stability and firmness during the pressure application process without slipping.

[0014] 5) The device has a simple structure and is easy to operate. It can be repeatedly used in the process of hollow slab beam hinged joint reinforcement construction under different conditions. It has strong applicability and high promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 It is a side view of the utility model.

[0017] Figure 2 It is a front view of the utility model.

[0018] Figure 3 It is a top view of the utility model.

[0019] Figure 4 This is a schematic diagram of the first working state of the utility model.

[0020] Figure 5 This is a schematic diagram of the second working state of the utility model.

[0021] In the figure: the pry bar arm 1, the pry hook 2, the pressure rod fixed section 3, the pressure rod adjustment section 4, the connecting sleeve 5, the limiting angle plate 6, the annular lifting ear 7, the rubber handle 8, the embedded annular reinforcement 9, and the bending reinforcement 10. DETAILED DESCRIPTION

[0022] like Figure 1-3As shown, a hollow slab beam hinge joint embedded steel bar efficient flat bending device includes a lever arm 1, the lever arm 1 is formed by bending an operating rod and a connecting rod, the angle between the operating rod and the connecting rod is greater than 90 degrees, preferably, the angle between the two is 120 degrees. A pry hook 2 is welded below the front end of the connecting rod of the lever arm 1, and the pry hook 2 is divided into two groups and arranged at intervals on the left and right. Annular hanging ears 7 are welded on the left and right sides of the middle lower end of the connecting rod of the lever arm 1, and the upper end of the pressure rod fixed section 3 passes through the annular hanging ears 7 on the left and right sides through the cross bar, so that it can rotate freely relative to the annular hanging ears 7. The lower end of the pressure rod fixed section 3 is detachably threadedly connected to the pressure rod adjustment section 4 through a connecting sleeve 5. The pressure rod adjustment section 4 can be set in multiple groups, and the pressure rod adjustment section 4 can be replaced according to the depth of different hinge joint embedded steel bars (bending steel bars 10), and then the overall length of the pressure rod can be adjusted to meet the flat bending requirements of different hinge joint embedded steel bars.

[0023] In addition, a limiting angle plate 6 is welded at the bottom of the pressure-bearing section adjustment section 4. The limiting angle plate 6 is made of angle iron. The limiting angle plate 6 will directly contact the middle section of the bending steel bar 10 (U-shaped), so that the device increases the contact area with the bending steel bar during the pressure process and evenly bears the force.

[0024] In addition, a rubber handle 8 is provided on the operating rod of the lever arm 1, and the rubber handle 8 enhances the friction force during the force application process to ensure that the lever arm 1 does not slip during the force application process.

[0025] Working principle and process: The pry hook 2 is hooked onto the pre-embedded annular reinforcement 9 (U-shaped) on the top surface of the hollow slab beam, the limiting angle plate 6 is placed on the bending steel bar 10 and limits the bending steel bar 10, and downward pressure is applied to the rubber handle 8 of the pry rod arm 1 through the lever principle. The whole device rotates around the point where the pry hook 2 is located at the pre-embedded annular reinforcement 9, and the force is transmitted downward, so as to achieve the purpose of flat bending of the pre-embedded reinforcement (bending steel bar 10) in the hinge joint.

Claims

1. A high-efficiency flat bending device for pre-embedded steel bars in hinged joints of hollow slab beams, characterized by: The invention comprises a lever arm (1), wherein a lever hook (2) is provided at the front end of the lever arm (1), an annular lifting ear (7) is fixed at the front lower end of the lever arm (1), the upper end of the pressure-bearing rod is rotatably mounted in the middle of the annular lifting ear (7), and a limiting angle plate (6) is fixed at the lower end; when the lever hook (2) is hooked into the embedded annular reinforcement (9), the limiting angle plate (6) contacts the bending reinforcement (10); when the lever arm (1) applies force downward, the limiting angle plate (6) flattens the bending reinforcement (10); The lever arm (1) is formed by bending an operating rod and a connecting rod in one piece, and the angle between the operating rod and the connecting rod is greater than 90 degrees and less than 180 degrees; the angle between the two is 120 degrees; The operating rod is provided with a rubber handle (8); The pressure-bearing rod comprises a pressure-bearing rod fixing section (3), and the pressure-bearing rod fixing section (3) is threadedly connected to the pressure-bearing rod adjusting section (4) via a connecting sleeve (5); A plurality of pressure-bearing rod adjustment sections (4) are provided, and the pressure-bearing rod adjustment sections (4) are replaced according to different hinge joint embedded reinforcement depths.

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