A roller type bending device in a concrete beam

Abstract

The utility model discloses a roller-type bender in a concrete beam body, comprising a guide device, a connecting bolt and a mounting base; the guide device and the mounting base are detachably connected by the connecting bolt; the guide device comprises a bottom plate arranged at the lower end of the guide device, the bottom plate is provided with a rectangular flat hole, the bolt head of the connecting bolt can pass through the rectangular flat hole, and the connecting bolt is connected to the guide device; the mounting base comprises a top plate arranged at the upper end of the mounting base, a hole is opened at the center position of the top plate, the lower part of the connecting bolt passes through the hole and extends out, and can move up and down at the center position of the top plate. The utility model uses a "T-shaped" bolt to realize the detachable connection between the guide device and the mounting base, has a simple structure, low manufacturing cost, and improves the convenience of disassembling the bender.

Description

Technical Field

[0001] The utility model relates to the technical field of roller bender, in particular to a roller bender in a concrete beam body. Background Art

[0002] The prestressed concrete beam with folded line arrangement is a new type of main beam that has been applied in bridge engineering in recent years. It bends the prestressed steel strands at the beam end upward according to the design requirements through the turning anchor system, so that the prestressed steel strands are adapted to the force requirements of the beam. It overcomes the disadvantage that the traditional straight line arrangement prestressed concrete components cannot be applied to larger spans, and eliminates the complex processes of post-tensioning method such as reserved channels, reinforcing bars, and grouting. It fundamentally avoids the disadvantage of inaccurate grouting of the channels of post-tensioned prestressed concrete beams, making it more competitive. The key problem of the folded line arrangement prestressing method is the positioning of the prestressed tendon at the fold line and the problem of prestress loss. Therefore, the key part of the folded line prestressing beam manufacturing equipment is the prestressed tendon bender.

[0003] The prestressed steel bar bending and steering devices currently used in beams mainly include pull-plate type bender and roller type bender. The bender includes a bending guide part embedded in the beam and a mounting base part outside the beam, both of which need to be disassembled and separated. The pull-plate of the most traditional bender generally exceeds the beam-slab ground. When disassembling, the lower pull-plate is cut off, which is not conducive to construction, and the steel bars are prone to rust after being cut off. Furthermore, there is a roller type bender, which connects the bender to the mounting base by bolts. When disassembling the bender, the connecting bolts need to be rotated, but because the mounting base is located under the pedestal, the operating space is narrow, which is not conducive to the screwing operation of the bolts, and it is still inconvenient.

[0004] After research, it was found that the technical problems existing in the prior art are: 1. Since the installation base of the bender is placed under the pedestal, it is not conducive to the disassembly of the base and the inner part of the beam body. Directly cutting off the pull-down steel plate will cause steel corrosion and material waste. Although the use of bolt rotation disassembly has a certain improvement in convenience, it will also be difficult to operate under space constraints. 2. The use of a lever structure to improve the convenience of disassembly of the bender is complex in structure and high in manufacturing cost. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a roller-type bender in a concrete beam body, aiming to improve the connection problem between a guide device of the bender embedded in the beam body and a mounting base outside the beam, and to increase the convenience of disassembling the bender.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A roller-type bender in a concrete beam body comprises: a guide device, a connecting bolt and a mounting base; the guide device and the mounting base are detachably connected by the connecting bolt;

[0008] The guide device includes a bottom plate arranged at the lower end of the guide device, and a rectangular flat hole is arranged on the bottom plate. The bolt head of the connecting bolt can pass through the rectangular flat hole to connect the connecting bolt to the guide device. The mounting base includes a top plate arranged at the upper end of the mounting base, and a hole is opened at the center position of the top plate. The lower part of the connecting bolt passes through the hole and extends out, and can move up and down at the center position of the top plate.

[0009] As a further technical solution, the head of the connecting bolt is a rectangular flat head and matches the rectangular flat hole.

[0010] As a further technical solution, the size of the rectangular flat hole is larger than the size of the rectangular flat head, so that the rectangular flat head can be inserted into the rectangular flat hole and can be rotated in any direction.

[0011] As a further technical solution, the connecting bolts are "T-shaped" bolts.

[0012] As a further technical solution, a first thread is provided at the lower portion of the connecting bolt, and a second thread matching the first thread is provided at the inner side of the hole at the center of the top plate.

[0013] As a further technical solution, a nut is provided in combination with the first thread, and the nut is provided on the lower end surface of the top plate to limit the up and down displacement of the connecting bolt.

[0014] As a further technical solution, the top plate of the mounting base is anchored to the ground by embedded bolts.

[0015] As a further technical solution, ear plates are welded on the top plate.

[0016] As a further technical solution, the guide device is embedded in the concrete beam body.

[0017] As a further technical solution, the bottom plate at the lower end of the guide device is configured as a flat cylindrical structure; and the top plate at the upper end of the mounting base is configured as a flat rectangular parallelepiped structure.

[0018] One or more technical solutions of the utility model have the following beneficial effects:

[0019] (1) The utility model improves the structure of the connecting bolts used to connect the guide device and the mounting base, changes the connecting bolts into a T-shaped shape, and simultaneously opens a rectangular flat hole on the bottom plate of the guide device, cancels the thread, and the bolt head can pass through the rectangular flat hole. By rotating to 90 degrees, the hole and the rectangular head are staggered to achieve quick connection. Similarly, by rotating until the two are aligned, quick disassembly can be completed. The operation is simple, and the convenience of disassembling the bender is improved.

[0020] (2) The utility model does not require any complex structure. It only needs to open a rectangular flat hole on the bottom plate and a threaded hole on the top plate, and use a "T-shaped" bolt to realize the detachable connection between the guide device and the mounting base. The structure is simple and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 This is a front view of the roller type bender of the utility model;

[0023] Figure 2 This is a bottom view of the roller-type bender of the utility model;

[0024] Among them: 1. bottom plate; 2. connecting bolt; 3. rectangular flat head; 4. rectangular flat hole; 5. first thread; 6. nut; 7. top plate. DETAILED DESCRIPTION

[0025] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] Embodiment 1

[0027] like Figure 1 and 2 As shown, the utility model provides a roller-type bender in a concrete beam body, comprising: a guide device, a connecting bolt 2 and a mounting base, wherein the guide device and the mounting base are detachably connected through the connecting bolt 2; wherein the guide device is embedded in the concrete beam body, thereby improving the convenience of disassembly and reducing the difficulty of operation.

[0028] like Figure 1 As shown, the guide device includes a bottom plate 1 arranged at the lower end of the guide device, and a rectangular flat hole 4 is provided on the bottom plate 1, and the bolt head of the connecting bolt 2 can pass through the rectangular flat hole to achieve the connection between the connecting bolt 2 and the guide device. Figure 2As shown, the mounting base includes a top plate 7 arranged at the upper end of the mounting base, the top plate of the mounting base is anchored to the ground by embedded bolts, and an ear plate is welded on the top plate 7, a hole is opened at the center of the top plate 7, the lower part of the connecting bolt 2 passes through the hole and extends out, and can move up and down at the center of the top plate, which is convenient for disassembly.

[0029] like Figure 1 As shown, the head of the connecting bolt is a rectangular flat head 3, which matches the rectangular flat hole 4, and the size of the rectangular flat hole 4 is larger than that of the rectangular flat head 3, so that the rectangular flat head 3 can be inserted into the rectangular flat hole 4 and can be rotated in any direction. In addition, in this embodiment, the connecting bolt adopts a "T-shaped" bolt. The lower part of the connecting bolt 2 is provided with a first thread 5, and the inner side of the hole at the center of the top plate is provided with a second thread matching the first thread. The first thread can be screwed into the second thread. A nut 6 is provided in conjunction with the first thread 5. In this embodiment, the nut 6 uses a high-strength nut. The nut 6 is set on the lower end surface of the top plate to limit the up and down displacement of the connecting bolt 2. In this embodiment, the connecting bolt is changed to a T-shaped one, and a rectangular flat hole is opened on the bottom plate of the guide device. The thread is cancelled, and the bolt head can pass through the rectangular flat hole. By rotating to 90 degrees, the hole and the rectangular head are staggered to achieve quick connection. Similarly, by rotating until the two are aligned, quick disassembly can be completed. The operation is simple, which improves the convenience of disassembly of the bender.

[0030] like Figure 1 and 2 As shown, in this implementation example, the bottom plate at the lower end of the guide device is configured as a flat cylindrical structure; and the top plate at the upper end of the mounting base is configured as a flat rectangular parallelepiped structure.

[0031] The specific working principle of the roller-type bender in the concrete beam body provided in this embodiment is as follows:

[0032] When connecting the guide device and the mounting base, just insert the rectangular flat head of the "T-shaped" bolt into the rectangular flat hole and rotate 90 degrees in any direction to complete the connection. During tensioning, the nut at the bottom of the top plate of the mounting base is in close contact with the lower end surface of the top plate, which can resist the vertical displacement of the guide device in the beam during tensioning and release. During disassembly, first loosen the nut at the bottom of the top plate of the mounting base to unload the "T-shaped" bolt, rotate 90 degrees in the opposite direction to align the rectangular flat head of the "T-shaped" bolt with the rectangular flat hole of the bottom plate of the guide device, pull down the "T-shaped" bolt to pull it out of the rectangular flat hole, and complete the disassembly of the bender. The utility model does not require any complex structure, but only opens a rectangular flat hole on the bottom plate and a threaded hole on the top plate, and uses a "T-shaped" bolt to realize a detachable connection between the guide device and the mounting base. It has a simple structure and low manufacturing cost.

[0033] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A roller-type bender in a concrete beam, characterized in that: include: A guide device, a connecting bolt and a mounting base; the guide device and the mounting base are detachably connected by the connecting bolt; The guide device includes a bottom plate arranged at the lower end of the guide device, and a rectangular flat hole is arranged on the bottom plate. The bolt head of the connecting bolt can pass through the rectangular flat hole to connect the connecting bolt to the guide device. The mounting base includes a top plate arranged at the upper end of the mounting base, and a hole is opened at the center position of the top plate. The lower part of the connecting bolt passes through the hole and extends out, and can move up and down at the center position of the top plate.

2. A roller-type bender in a concrete beam as claimed in claim 1, characterized in that: The head of the connecting bolt is a rectangular flat head and matches the rectangular flat hole.

3. A roller-type bender in a concrete beam as claimed in claim 2, characterized in that: The size of the rectangular flat hole is larger than that of the rectangular flat head, so that the rectangular flat head can be inserted into the rectangular flat hole and can be rotated in any direction.

4. The roller-type bender in a concrete beam as claimed in claim 1, characterized in that: The connecting bolts are "T-shaped" bolts.

5. The roller-type bender in a concrete beam as claimed in claim 1, characterized in that: The lower part of the connecting bolt is provided with a first thread, and the inner side of the hole at the center of the top plate is provided with a second thread matching the first thread.

6. A roller-type bender in a concrete beam as claimed in claim 5, characterized in that: A nut is provided in conjunction with the first thread. The nut is provided on the lower end surface of the top plate and is used to limit the up and down displacement of the connecting bolt.

7. The roller bender in a concrete beam as claimed in claim 1, characterized in that: The top plate of the mounting base is anchored to the ground by embedded bolts.

8. The roller bender in a concrete beam as claimed in claim 1, characterized in that: Ear plates are welded on the top plate.

9. The roller-type bender in a concrete beam as claimed in claim 1, characterized in that: The guide device is embedded in the concrete beam body.

10. The roller bender in a concrete beam as claimed in claim 1, characterized in that: The bottom plate at the lower end of the guide device is configured as a flat cylindrical structure; the top plate at the upper end of the mounting base is configured as a flat rectangular parallelepiped structure.

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