Reinforcing bar connecting structure for segmentally casted transfer beam

Abstract

The utility model discloses a purpose lies in the reinforcing steel bar connecting structure of segmented pouring conversion beam, solves the problem that reinforcing steel bar connection needs to carry out thread processing to reinforcing steel bar in advance at present stage, including including base plate, the recess of opening through left and right sides has on base plate upper end, two pressing plates are equipped with on base plate top, two pressing plates are arranged left and right, and the sunken groove of opening through left and right sides has on pressing plate lower end, a plurality of bent shafts are equipped with between every pressing plate and base plate, and the bent shaft both ends are hinged with base plate or pressing plate, and the movement track of pressing plate is the arc of upper convex when the bent shaft makes the movement track of pressing plate when two pressing plates move respectively to the both sides of base plate, and pressing plate is always parallel with base plate when moving relative to base plate, and pre -tightening module is equipped with between two pressing plates, and can force two pressing plates to be close to base plate through pre -tightening module.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and in particular relates to the steel reinforcement connection structure of segmented cast-in-place transfer beams. Background Technology

[0002] Due to their large size, transfer beams are prone to structural cracks if cast as a whole because the heat inside the concrete cannot be dissipated in time. Therefore, they are mostly cast in sections to ensure construction quality. In the specific construction process, after the previous section is cast, the steel bars of the next section need to be connected to the steel bar ends reserved in the previous section. Currently, steel bar sleeves are mostly used to achieve the connection. However, using rebar sleeves requires machining the external threads at both ends of the rebar using specific equipment before the latter rebar can be fixedly connected to the former. This not only increases the cost and extends the construction period, but also places higher demands on the handling and storage of the threaded rebar, requiring care to prevent the threads at both ends from being bumped or deformed, which could affect the efficiency of subsequent threaded connections. Furthermore, at this point, part of the transfer beam has already been poured, and when screwing on the rebar sleeve, only the latter rebar can be rotated. Since the rebar itself is long, the latter rebar will bend downwards at the end furthest from the rebar sleeve. Under these circumstances, rotating the latter rebar is extremely difficult, resulting in a large amount of labor involved in the connection and further reducing construction efficiency. Therefore, there is currently a need for a method that can achieve a reliable connection without additional processing of the rebar. Utility Model Content

[0003] The purpose of this utility model is to provide a steel reinforcement connection structure for segmented cast-in-place transfer beams in order to solve the problem that steel reinforcement connection requires pre-threading of steel reinforcement.

[0004] The technical solution includes a substrate with a groove extending through the left and right sides at the top. Two pressure plates are arranged on the top of the substrate, and the bottom of each pressure plate has a recess extending through the left and right sides. Multiple bent shafts are provided between each pressure plate and the substrate. The two ends of the bent shafts are hinged to the substrate or the pressure plates. When the two pressure plates move to the sides of the substrate, the bent shafts make the movement trajectory of the pressure plates convex arcs. The pressure plates are always parallel to the substrate when they move relative to it. A pre-tightening module is provided between the two pressure plates, which can force the two pressure plates to move closer to the substrate.

[0005] In the above or some embodiments, both ends of the front end of the substrate and the pressure plate are provided with blind holes. The axes of all blind holes on the substrate are in the same plane. When the top surfaces of the two pressure plates are coplanar, the axes of all blind holes on the two pressure plates are in the same plane. The bent shaft is a U-shaped circular shaft, and the two ends of the bent shaft are respectively inserted into the blind holes on the substrate or the pressure plate. Thus, the connection between the substrate and the pressure plate is realized through the bent shaft, and the pressure plate always moves relative to the substrate in a state parallel to the substrate.

[0006] In the above or some embodiments, a circular groove is formed at the bottom of the blind hole, and a through groove is formed on the side wall of the blind hole. The distance from the outer wall of the through groove to the axis of the blind hole is equal to the radius of the circular groove. Limiting blocks are fixed on the side walls at both ends of the bent shaft. The distance from the outer wall of the limiting block to the axis of the bent shaft is less than the radius of the circular groove, and the width of the limiting block is less than the width of the through groove. In use, the two limiting blocks on the bent shaft are aligned with the through grooves on the substrate and the pressure plate. Then the bent shaft is inserted into the blind hole. After the pressure plate rotates relative to the substrate, the limiting groove disengages from the through groove and rotates in the circular groove, thereby preventing the bent shaft from falling out of the blind hole.

[0007] In the above or some embodiments, the cross-sectional shape of the groove and the sink is arc-shaped, and the radii of the two arcs are equal. During the process of the pressure plate approaching the substrate, the inner wall of the groove and the inner wall of the sink can be on the same cylindrical surface. In use, the two pressure plates press the ends of the two steel bars onto the substrate respectively. The ends of the two steel bars are wrapped and squeezed by the groove and the sink, thereby achieving the effect of fixing both steel bars to the substrate.

[0008] In the above or some embodiments, both ends of the groove and the sink are provided with blocks. Two sliding pieces are provided between the two blocks in the groove. The sliding pieces can slide along the axis in the groove. A shim is provided between the two blocks in the sink. The shim cannot slide in the sink. The hardness of the sliding pieces and the shim is less than that of the steel bar. When the steel bar is clamped between the base plate and the pressure plate, the transverse ribs and longitudinal ribs on the steel bar can squeeze and deform the sliding pieces or the shim, thereby increasing the friction between the steel bar and the sliding pieces or the shim.

[0009] In the above or some embodiments, the thickness of the stop block is less than the thickness of the slider or shim to prevent the reinforcing bar from contacting the stop block; multiple rectangular grooves are opened on the inner wall of the slider and the shim, and the angle between the rectangular groove and the axis of the reinforcing bar and the angle between the transverse rib and the axis of the reinforcing bar are not equal; so that when the reinforcing bar is clamped between the base plate and the pressure plate, the rectangular groove can increase the deformation of the slider or shim, and further increase the friction between the reinforcing bar and the slider or shim.

[0010] In the above or some embodiments, the pre-tightening module includes a screw, and both pressure plates have through holes penetrating the left and right end faces. The two ends of the screw are respectively located in the through holes on the two pressure plates, and two nuts are screwed on the screw between the two pressure plates. Rotating the two nuts can push the two pressure plates away from each other, and then be pulled closer to the substrate by the bending shaft.

[0011] This technical solution has the following technical effects: 1. This utility model achieves a fixed connection of steel bars by extruding the base plate and the pressure plate. It eliminates the need to machine the threads at the ends of the steel bars with specific equipment before use, which not only speeds up the construction process and reduces equipment costs, but also ensures that the fixing effect will not be affected even if bumps occur during handling and storage, making it highly practical.

[0012] 2. When fixing the reinforcing bar, this utility model only requires turning the nut to apply pre-tightening force to the reinforcing bar through the pressure plate, and then dragging the next section of reinforcing bar and tightening the nut again to achieve final fixing. It does not require turning long and naturally curved reinforcing bars, and the labor intensity is low.

[0013] 3. If there is a small bend at the end of the reinforcing bar, it is impossible to machine the thread. The only options are to cut the bend and machine it or discard the entire reinforcing bar. However, in this solution, the bend can be placed in the gap between the two pressure plates during fixing. As long as there is no bend in the section in contact with the pressure plate, the expected fixing effect can be achieved. Therefore, even if the end is bent, it can still be fixed, which helps to reduce construction costs.

[0014] 4. This utility model allows the bent shaft to be freely disassembled from the base plate and pressure plate by using the limiting block on the bent shaft and the through groove and circular groove in the blind hole. In addition to the existing method of assembling and installing the sleeve from one end of the steel bar, it proposes a method of installation from the side of the steel bar, so that the connection can be completed even when the sleeve cannot be inserted between the two steel bars, thus improving the applicability of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention in use.

[0016] Figure 2 This is a perspective view of the present invention.

[0017] Figure 3 This is an exploded view of the structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the assembly of the substrate and the slider of this utility model.

[0019] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle.

[0020] Figure 6 This is a schematic diagram of the assembly of the pressure plate and gasket of this utility model.

[0021] Figure 7 This is a part drawing of the bent shaft of this utility model.

[0022] Legend: 1. Base plate; 2. Groove; 3. Pressure plate; 4. Countersunk groove; 5. Bent shaft; 6. Blind hole; 7. Circular groove; 8. Through groove; 9. Limiting block; 10. Stop block; 11. Slider; 12. Washer; 13. Rectangular groove; 14. Screw; 15. Through hole; 16. Nut. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0025] Reference Figure 1 , Figure 2 and Figure 3 One embodiment shown includes a substrate 1. The upper end of the substrate 1 has a groove 2 that extends through the left and right sides. Two pressure plates 3 are provided above the substrate 1 and are arranged left and right. The lower end of the pressure plates 3 has a recessed groove 4 that extends through the left and right sides. Both ends of the front end of the substrate 1 and the pressure plates 3 have blind holes 6. The axes of all blind holes 6 on the substrate 1 are in the same plane. When the top surfaces of the two pressure plates 3 are coplanar, the axes of all blind holes 6 on the two pressure plates 3 are in the same plane. Each pressure plate 3 is provided with multiple bent shafts 5 between itself and the substrate 1. The bent shaft 5 is a U-shaped circular shaft. Both ends of the bent shaft 5 are inserted into the blind holes 6 on the substrate 1 or the pressure plate 3, respectively, to achieve the hinge connection between the bent shaft 5 and the substrate 1 or the pressure plate 3. When the two pressure plates 3 move to the sides of the substrate 1, the bent shaft 5 makes the movement trajectory of the pressure plate 3 convex arc. The pressure plate 3 is always parallel to the substrate 1 when it moves relative to the substrate 1. A pre-tightening module is provided between the two pressure plates 3. The pre-tightening module can force the two pressure plates 3 to move closer to the substrate 1.

[0026] In the above embodiment, the device is inserted into the end of the reserved steel bar of the upper section of the completed transfer beam, so that the upper section of steel bar is located between the base plate 1 and one of the pressure plates 3. Then, the lower section of unfixed steel bar is inserted between the base plate 1 and the other pressure plate 3. The base plate 1 and the pressure plate 3 contact the steel bars on both sides through the groove 2 and the countersunk groove 4, respectively. Then, the two nuts 16 are turned to move the two pressure plates 3 to both sides of the base plate 1, so that the pressure plates 3 are pulled away from the base plate 1 and then closer to the base plate 1 under the pull of the bending shaft 5. Finally, the two pressure plates 3, under the action of the screw 14 and the nut 16, together with the base plate 1, press the two steel bars together to achieve preliminary pre-tightening. Then, the next section of the reinforcing bar is pulled away from the base plate 1. At this time, since there is already a pre-tightening force between the reinforcing bar and the pressure plate 3, there is friction between the reinforcing bar and the pressure plate 3. Therefore, when the reinforcing bar is pulled, the pressure plate 3 is also pulled synchronously, which makes the pressure between the pressure plate 3 and the base plate 1 greater. Continue to tighten the nut 16 to squeeze the nut 16 and the pressure plate 3, so that the two pressure plates 3 will not be close to each other after the tension on the next section of the reinforcing bar is released, thereby fixing the pressure between the pressure plate 3 and the base plate 1 and achieving the final fixing effect of the reinforcing bar.

[0027] Reference Figure 5 and Figure 7 In one embodiment shown, a circular groove 7 is formed at the bottom of the blind hole 6, and a through groove 8 is formed on the side wall of the blind hole 6. The distance from the outer wall of the through groove 8 to the axis of the blind hole 6 is equal to the radius of the circular groove 7. Limiting blocks 9 are welded on the side walls at both ends of the bent shaft 5. The distance from the outer wall of the limiting block 9 to the axis of the bent shaft 5 is less than the radius of the circular groove 7, and the width of the limiting block 9 is less than the width of the through groove 8.

[0028] In the above embodiment, first align the two limiting blocks 9 on the bent shaft 5 with the through grooves 8 on the base plate 1 and the pressure plate 3, then insert the bent shaft 5 into the blind hole 6. After the pressure plate 3 rotates relative to the base plate 1, the limiting groove disengages from the through groove 8 and rotates in the circular groove 7, thereby preventing the bent shaft 5 from falling out of the blind hole 6. Then, insert the device into the end of the reserved steel bar in the previous section and continue to fix the two steel bars. Furthermore, since the bending shaft 5 can be freely disassembled, when both sides of the reinforcing bars are fixed, and the reinforcing bar skeleton of one section has been built but the two sections of reinforcing bars have not yet been connected, the base plate 1 is first attached to one side of the two reinforcing bars, and then the two pressure plates 3 are attached to the other side of the two reinforcing bars respectively. Then, the base plate 1 and the pressure plates 3 are connected by the bending shaft 5. Finally, the screw 14 is inserted into the through hole 15 from one end of one of the pressure plates 3, and the nut 16 is screwed between the two pressure plates 3. In this way, the purpose of temporarily assembling the device at the connection of the two reinforcing bars is achieved. That is, in addition to the existing installation method that can only install the reinforcing bar sleeve from one end of the reinforcing bar, a new installation method for the reinforcing bar connection structure is proposed. The device can also be installed from the side of the reinforcing bar, and then the reinforcing bars on both sides can be fixed. The installation method is diverse and highly applicable.

[0029] Reference Figure 4 and Figure 6 In one embodiment shown, the cross-sectional shape of both the groove 2 and the sink 4 is arc-shaped, and the radii of the two arcs are equal. As the pressure plate 3 approaches the substrate 1, the inner wall of the groove 2 and the inner wall of the sink 4 can be on the same cylindrical surface. Both ends of the groove 2 and the sink 4 are provided with arc-shaped stops 10. The stops 10 are coaxially welded and fixed to the groove 2 and the sink 4. Two sliding pieces 11 are provided between the two stops 10 in the groove 2. The sliding pieces 11 can slide along the axis in the groove 2. A shim 12 is provided between the two stops 10 in the sink 4. The shim 12 is stuck between the two stops 10 and cannot slide in the sink 4. The sliding pieces 11 and the shim 12 are made of a metal such as copper or aluminum to ensure that the hardness of the sliding pieces 11 and the shim 12 is less than the hardness of the steel bar.

[0030] In the above embodiment, since the groove 2 and the sink 4 are respectively equipped with a sliding plate 11 and a washer 12 with a hardness lower than that of the steel bar, when the steel bar is pre-tightened by the screw 14 and nut 16, or when the next section of the steel bar is pulled outward, the transverse and longitudinal ribs on the steel bar can easily press the sliding plate 11 or the washer 12 into indentations. This makes the friction between the steel bar and the sliding plate 11 or the washer 12 greater when the next section of the steel bar is subjected to tension. The sliding plate 11 slides relative to the groove 2, and the washer 12 drives the pressure plate 3 to move to both sides. Under the pull of multiple bending shafts 5, the pressure plate 3 further increases the pressure on the steel bar, achieving a more secure fixing effect.

[0031] Reference Figure 4 and Figure 6 In one embodiment shown, the thickness of the stop block 10 is less than the thickness of the slider 11 or the shim 12, so that the reinforcing bar does not contact the stop block 10 during the entire fixing and use process, but only contacts the slider 11 or the shim 12. Placing the stop block 10 affects the squeezing effect between the reinforcing bar and the slider or the shim 12. Multiple rectangular grooves 13 are opened on the inner walls of the sliding plate 11 and the washer 12. The angle between the rectangular groove 13 and the axis of the reinforcing bar is not equal to the angle between the transverse rib and the axis of the reinforcing bar. When the reinforcing bar is clamped between the base plate 1 and the pressure plate 3, each transverse rib will contact multiple rectangular grooves 13, thereby reducing the force required for the reinforcing bar to press the sliding plate 11 or the washer 12, increasing the friction between the reinforcing bar and the sliding plate 11 or the washer 12 during the pre-tightening stage, and providing a good frictional foundation for the subsequent pulling of the reinforcing bar and the continued rotation of the nut 16 to achieve final fixation.

[0032] Reference Figure 5 and Figure 3 In one embodiment shown, the pre-tightening module includes a screw 14, and two pressure plates 3 each have through holes 15 extending through the left and right end faces. When the two pressure plates 3 are in contact with each other, the two through holes 15 are coaxial. The two ends of the screw 14 are respectively located in the through holes 15 on the two pressure plates 3, and two nuts 16 are screwed onto the screw 14 between the two pressure plates 3.

[0033] In use, turning the two nuts 16 will push the two pressure plates 3 away from each other, and then the pressure plates 3 will be pulled by the bending shaft 5 to finally clamp the steel bar together with the base plate 1, thus achieving the pre-tightening of the steel bar.

Claims

1. A steel reinforcement connection structure for a segmented cast-in-place transfer beam, characterized in that, The substrate (1) has a groove (2) that runs through the left and right sides at the top. Two pressure plates (3) are provided above the substrate (1) and are arranged left and right. The pressure plates (3) have a recessed groove (4) that runs through the left and right sides at the bottom. Each pressure plate (3) has multiple bent shafts (5) between it and the substrate (1). The two ends of the bent shafts (5) are hinged to the substrate (1) or the pressure plate (3). When the two pressure plates (3) move to the sides of the substrate (1) respectively, the bent shafts (5) make the movement trajectory of the pressure plates (3) be an upward convex arc. The pressure plates (3) are always parallel to the substrate (1) when they move relative to the substrate (1). A pre-tightening module is provided between the two pressure plates (3). The pre-tightening module can force the two pressure plates (3) to move closer to the substrate (1).

2. The connection structure according to claim 1, characterized in that, The substrate (1) and the pressure plate (3) are both provided with blind holes (6). The axes of all blind holes (6) on the substrate (1) are in the same plane. When the top surfaces of the two pressure plates (3) are coplanar, the axes of all blind holes (6) on the two pressure plates (3) are in the same plane. The bent shaft (5) is a U-shaped circular shaft. The two ends of the bent shaft (5) are inserted into the blind holes (6) on the substrate (1) or the pressure plate (3) respectively.

3. The connection structure according to claim 2, characterized in that, The blind hole (6) has a circular groove (7) at the bottom and a through groove (8) on the side wall of the blind hole (6). The distance from the outer wall of the through groove (8) to the axis of the blind hole (6) is equal to the radius of the circular groove (7). Limiting blocks (9) are fixed on the side walls at both ends of the bent shaft (5). The distance from the outer wall of the limiting block (9) to the axis of the bent shaft (5) is less than the radius of the circular groove (7), and the width of the limiting block (9) is less than the width of the through groove (8).

4. The connection structure according to claim 1, characterized in that, The cross-sectional shape of the groove (2) and the sink (4) is arc-shaped, and the radii of the two arcs are equal. During the process of the pressure plate (3) approaching the substrate (1), the inner wall of the groove (2) and the inner wall of the sink (4) can be on the same cylindrical surface.

5. The connection structure according to claim 1, characterized in that, Both ends of the groove (2) and the sink (4) are provided with a stop block (10). There are two sliding pieces (11) between the two stop blocks (10) in the groove (2). The sliding pieces (11) can slide along the axis in the groove (2). There is a shim (12) between the two stop blocks (10) in the sink (4). The shim (12) cannot slide in the sink (4). The hardness of the sliding pieces (11) and the shim (12) is less than the hardness of the steel bar.

6. The connection structure according to claim 5, characterized in that, The thickness of the stop block (10) is less than the thickness of the slide plate (11) or the shim (12); multiple rectangular grooves (13) are opened on the inner wall of the slide plate (11) and the shim (12), and the angle between the rectangular groove (13) and the axis of the reinforcing bar and the angle between the transverse rib and the axis of the reinforcing bar are not equal.

7. The connection structure according to claim 1, characterized in that, The pre-tightening module includes a screw (14), and two pressure plates (3) each have through holes (15) that penetrate the left and right end faces. The two ends of the screw (14) are respectively located in the through holes (15) on the two pressure plates (3), and two nuts (16) are screwed on the screw (14) between the two pressure plates (3).

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