Reinforcing steel bar prestress tensioning device

Abstract

The utility model discloses a reinforcing steel bar prestress tensioning device, which relates to the technical field of reinforcing steel bar tensioning, and comprises a tensioning mechanism, an ejector plate is arranged at one end of the tensioning mechanism, a fixing component is arranged on the side surface of the ejector plate, the fixing component comprises a fixing sleeve, an arc-shaped positioning plate and a rubber non-slip mat are arranged in the middle of the fixing sleeve, and the arc-shaped positioning plate and the rubber non-slip mat are arranged in the middle of the fixing sleeve. A positioning rod and a rotating shaft are arranged at the top of the arc-shaped positioning plate, a supporting arm is arranged outside the rotating shaft, a bearing frame and a rotating rod are arranged in the middle of the supporting arm, and an ejection hydraulic cylinder is arranged at one end of the supporting arm. According to the reinforcing steel bar tensioning device, a reinforcing steel bar needing to be tensioned is positioned and clamped through the arranged fixing assembly, one end of the supporting arm is jacked up through the arranged jacking hydraulic cylinder, the end, away from the jacking hydraulic cylinder, of the supporting arm sinks, the supporting arm drives the positioning rod to descend the arc-shaped positioning plate, and then the reinforcing steel bar is tensioned. And therefore, the arc-shaped positioning plate drives the rubber non-slip mat to position and connect the reinforcing steel bars.

Description

Technical Field

[0001] This utility model relates to the field of steel bar tensioning technology, and in particular to a steel bar prestressing tensioning device. Background Technology

[0002] Reinforcing steel tensioning typically refers to the process of prestressing or post-tensioning reinforcing steel in concrete structures. This technique enhances the load-bearing capacity and flexural strength of concrete structures. In prestressed concrete structures, the reinforcing steel is pre-tensioned and then held in tension through the hardening process of the concrete. This generates compressive stress, placing the concrete in a compressed state and increasing its flexural strength. Post-tensioning is a process that occurs after the concrete has hardened, where the reinforcing steel is stretched using a tensioning device, and anchorage forces are applied to both ends of the steel, directly transferring the tension force into the concrete structure.

[0003] This helps reduce the crack width of concrete under stress and improves the structure's resistance and durability. However, in existing steel bar tensioning processes, the steel bars are not securely fixed, posing a risk of detachment. Therefore, a steel bar prestressing tensioning device is needed to solve the above problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a prestressed steel bar tensioning device, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A prestressed steel bar tensioning device includes a tensioning mechanism, one end of which is provided with a top plate, and the side of the top plate is provided with a fixing component.

[0007] The fixing component includes a fixing sleeve, in which an arc-shaped positioning plate and a rubber anti-slip pad are provided in the middle. A positioning rod and a rotating shaft are provided on the top of the arc-shaped positioning plate, and a support arm is provided on the outside of the rotating shaft. A bearing frame and a rotating rod are provided in the middle of the support arm, and an ejection hydraulic cylinder is provided at one end of the support arm. A spherical connecting seat is provided on the top of the ejection hydraulic cylinder.

[0008] Preferably, the fixing sleeve is fixedly connected to the ejector plate, and there are two fixing sleeves, which are symmetrically distributed on both sides of the ejector plate. A positioning groove is provided in the middle of the fixing sleeve and the positioning groove penetrates the ejector plate. An arc-shaped positioning plate is installed in the middle of the positioning groove, and there are two arc-shaped positioning plates, which are symmetrically distributed on both sides of the positioning groove. The arc-shaped positioning plate is located inside the end of the fixing sleeve away from the ejector plate.

[0009] Preferably, a rubber anti-slip pad is fixedly connected to the inner wall of the arc-shaped positioning plate, and the rubber anti-slip pad is correspondingly arranged with the arc-shaped positioning plate. An anti-slip groove is formed on the inner wall of the rubber anti-slip pad. A positioning rod is fixedly connected to the outer wall of the arc-shaped positioning plate on the side away from the rubber anti-slip pad, and the end of the positioning rod away from the arc-shaped positioning plate passes through the fixing sleeve.

[0010] Preferably, there are two positioning rods, symmetrically distributed at the top and bottom of the fixed sleeve, and the positioning rods are slidably connected to the fixed sleeve. A rotating shaft is slidably connected to the middle of the top of the positioning rod, and the rotating shaft passes through the positioning rod. A support arm is sleeved on the outside of the rotating shaft, and a groove is opened at one end of the support arm near the rotating shaft. The positioning rod is rotatably connected to the rotating shaft in the middle of the groove, and the end of the support arm near the groove is sleeved on the outer walls of both ends of the rotating shaft.

[0011] Preferably, a rotating rod is inserted into the middle of the support arm and passes through the support arm. The support arm and the rotating rod are rotatably connected. A support frame is sleeved on the outside of the support arm, and the two ends of the rotating rod are connected to the top two ends of the support frame. The rotating rod and the support frame are connected by bolts, and the support arm and the support frame are rotatably connected.

[0012] Preferably, a connecting groove is provided at the bottom of the end of the support arm away from the positioning rod, and the connecting groove is spherically shaped. A spherical connecting seat is installed inside the connecting groove, and the spherical connecting seat is rotatably connected to the support arm. An ejection hydraulic cylinder is installed at the bottom of the spherical connecting seat, and the movable end of the ejection hydraulic cylinder is connected to the spherical connecting seat. The bottom of the ejection hydraulic cylinder is installed inside the fixed sleeve near the ejection plate by bolts.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this invention, a fixed component is used to position and clamp the steel bar that needs to be tensioned. A hydraulic cylinder is used to lift one end of the support arm, causing the end of the support arm away from the hydraulic cylinder to sink. The support arm drives the positioning rod to lower the arc-shaped positioning plate, which in turn drives the rubber anti-slip pad to position and connect the steel bar. The rubber anti-slip pad increases the friction at the connection point, further improving the positioning stability. Attached Figure Description

[0015] Figure 1 This is a first-view structural schematic diagram of the entire device of this utility model;

[0016] Figure 2 This is a second-view structural schematic diagram of the overall device of this utility model;

[0017] Figure 3 This is a structural schematic diagram of the fixing component of this utility model;

[0018] Figure 4 This is a structural schematic diagram of the cross-section of the fixing sleeve of this utility model.

[0019] In the diagram: 1. Tensioning mechanism; 2. Ejection plate; 3. Fixing component; 4. Fixing sleeve; 5. Positioning groove; 6. Arc-shaped positioning plate; 7. Rubber anti-slip pad; 8. Positioning rod; 9. Rotating shaft; 10. Support arm; 11. Groove; 12. Bearing frame; 13. Rotating rod; 14. Ejection hydraulic cylinder; 15. Spherical connecting seat; 16. Connecting groove. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Please see Figure 1 , Figure 2 , Figure 3 As shown, a prestressed steel bar tensioning device includes a tensioning mechanism 1, one end of which is provided with a top plate 2, and the side of the top plate 2 is provided with a fixing component 3.

[0022] The fixing component 3 includes a fixing sleeve 4. An arc-shaped positioning plate 6 and a rubber anti-slip pad 7 are disposed in the middle of the fixing sleeve 4. A positioning rod 8 and a rotating shaft 9 are disposed on the top of the arc-shaped positioning plate 6. A support arm 10 is disposed outside the rotating shaft 9. A bearing frame 12 and a rotating rod 13 are disposed in the middle of the support arm 10. An ejection hydraulic cylinder 14 is disposed at one end of the support arm 10. A spherical connecting seat 15 is disposed on the top of the ejection hydraulic cylinder 14. The fixing sleeve 4 is fixedly connected to the ejection plate 2. There are two fixing sleeves 4, symmetrically distributed on both sides of the ejection plate 2. A positioning groove 5 is formed in the middle of the fixing sleeve 4. The positioning groove 5 penetrates the ejector plate 2. An arc-shaped positioning plate 6 is installed in the middle of the positioning groove 5. There are two arc-shaped positioning plates 6, which are symmetrically distributed on both sides of the positioning groove 5. The arc-shaped positioning plate 6 is located inside the end of the fixing sleeve 4 away from the ejector plate 2. A rubber anti-slip pad 7 is fixedly connected to the inner wall of the arc-shaped positioning plate 6. The rubber anti-slip pad 7 is set correspondingly to the arc-shaped positioning plate 6. An anti-slip groove is opened on the inner wall of the rubber anti-slip pad 7. A positioning rod 8 is fixedly connected to the outer wall of the side of the arc-shaped positioning plate 6 away from the rubber anti-slip pad 7. The end of the positioning rod 8 away from the arc-shaped positioning plate 6 penetrates the fixing sleeve 4.

[0023] There are two positioning rods 8, symmetrically distributed at the top and bottom of the fixing sleeve 4, and the positioning rods 8 are slidably connected to the fixing sleeve 4. A rotating shaft 9 is slidably connected to the middle of the top of the positioning rod 8, and the rotating shaft 9 passes through the positioning rod 8. A support arm 10 is sleeved on the outside of the rotating shaft 9, and a groove 11 is opened at the end of the support arm 10 near the rotating shaft 9. The positioning rod 8 and the rotating shaft 9 are rotatably connected in the middle of the groove 11, and the end of the support arm 10 near the groove 11 is sleeved on the outer walls of both ends of the rotating shaft 9. A rotating rod 13 is inserted in the middle of the support arm 10, and the rotating rod 13 passes through the support arm 10. The support arm 10 and the rotating rod 13 are rotatably connected. A bearing frame 12 is sleeved on the outside of the support arm 10, and the two ends of the rotating rod 13 are connected to the top two ends of the bearing frame 12. The rotating rod 13 and the bearing frame 12 are connected by bolts, and the support arm 10 is rotatably connected to the bearing frame 12. A groove is opened at the bottom of the end of the support arm 10 away from the positioning rod 8. A connecting groove 16 is provided, and the connecting groove 16 is spherically shaped. A spherical connecting seat 15 is installed inside the connecting groove 16, and the spherical connecting seat 15 is rotatably connected to the support arm 10. A push-out hydraulic cylinder 14 is installed at the bottom of the spherical connecting seat 15, and the movable end of the push-out hydraulic cylinder 14 is connected to the spherical connecting seat 15. The bottom of the push-out hydraulic cylinder 14 is installed inside the fixed sleeve 4 near the push-out plate 2 by bolts. The fixed component 3 is used to position and clamp the steel bar that needs to be tensioned. The push-out hydraulic cylinder 14 is used to lift one end of the support arm 10, causing the end of the support arm 10 away from the push-out hydraulic cylinder 14 to sink. The support arm 10 drives the positioning rod 8 to lower the arc-shaped positioning plate 6, so that the arc-shaped positioning plate 6 drives the rubber anti-slip pad 7 to position and connect the steel bar. The rubber anti-slip pad 7 increases the friction at the connection and further improves the positioning stability.

[0024] It should be noted that this utility model is a prestressed steel bar tensioning device. In use, the steel bar to be tensioned is placed in the middle of the fixing sleeve 4, with the steel bar located inside the positioning groove 5. The ejector hydraulic cylinder 14 lifts the end of the support arm 10 away from the positioning rod 8, causing the support arm 10 to rotate along the central rotating rod 13. The end of the support arm 10 away from the ejector hydraulic cylinder 14 then sinks, causing the support arm 10 to lower the positioning rod 8 and the rotating shaft 9. An arc-shaped positioning plate 6 and a rubber anti-slip pad 7 are installed at the bottom of the positioning rod 8, allowing the arc-shaped positioning plate 6 to descend with the positioning rod 8 and contact the steel bar, thus achieving tensioning of the steel bar. The positioning and clamping of the reinforcing bar is achieved by installing a rubber anti-slip pad 7 on the inner wall of the arc-shaped positioning plate 6. The rubber anti-slip pad 7 increases the friction between the arc-shaped positioning plate 6 and the reinforcing bar contact surface, thereby improving the positioning stability. The support arm 10 is rotatably connected to the positioning rod 8 via a rotating shaft 9 to prevent the support arm 10 from jamming with the positioning rod 8 during use. The end of the support arm 10 away from the positioning rod 8 is rotatably connected to the inside of the connecting groove 16 via a ball joint 15 and connected to the ejector hydraulic cylinder 14. When the ejector hydraulic cylinder 14 lifts the support arm 10, the ball joint 15 rotates inside the connecting groove 16, improving the stability of the device.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A prestressed steel bar tensioning device, comprising a tensioning mechanism (1), characterized in that: One end of the tensioning mechanism (1) is provided with a top plate (2), and a fixing component (3) is provided on the side of the top plate (2); The fixing component (3) includes a fixing sleeve (4), an arc-shaped positioning plate (6) and a rubber anti-slip pad (7) are provided in the middle of the fixing sleeve (4), a positioning rod (8) and a rotating shaft (9) are provided on the top of the arc-shaped positioning plate (6), and a support arm (10) is provided on the outside of the rotating shaft (9). A bearing frame (12) and a rotating rod (13) are provided in the middle of the support arm (10), and an ejection hydraulic cylinder (14) is provided at one end of the support arm (10). A spherical connecting seat (15) is provided on the top of the ejection hydraulic cylinder (14).

2. The prestressed steel tensioning device according to claim 1, characterized in that: The fixing sleeve (4) is fixedly connected to the ejector plate (2), and there are two fixing sleeves (4), which are symmetrically distributed on both sides of the ejector plate (2). A positioning groove (5) is provided in the middle of the fixing sleeve (4), and the positioning groove (5) penetrates the ejector plate (2). An arc-shaped positioning plate (6) is installed in the middle of the positioning groove (5), and there are two arc-shaped positioning plates (6), which are symmetrically distributed on both sides of the positioning groove (5). The arc-shaped positioning plate (6) is located inside the end of the fixing sleeve (4) away from the ejector plate (2).

3. A prestressed steel bar tensioning device according to claim 2, characterized in that: A rubber anti-slip pad (7) is fixedly connected to the inner wall of the arc-shaped positioning plate (6), and the rubber anti-slip pad (7) is correspondingly set to the arc-shaped positioning plate (6). An anti-slip groove is opened on the inner wall of the rubber anti-slip pad (7). A positioning rod (8) is fixedly connected to the outer wall of the arc-shaped positioning plate (6) away from the rubber anti-slip pad (7), and the end of the positioning rod (8) away from the arc-shaped positioning plate (6) passes through the fixing sleeve (4).

4. The prestressed steel tensioning device according to claim 1, characterized in that: There are two positioning rods (8), which are symmetrically distributed at the top and bottom of the fixed sleeve (4) respectively, and the positioning rods (8) are slidably connected to the fixed sleeve (4). A rotating shaft (9) is slidably connected to the top center of the positioning rod (8), and the rotating shaft (9) passes through the positioning rod (8). A support arm (10) is sleeved on the outside of the rotating shaft (9), and a groove (11) is opened at one end of the support arm (10) near the rotating shaft (9). The positioning rod (8) and the rotating shaft (9) are rotatably connected in the middle of the groove (11), and the end of the support arm (10) near the groove (11) is sleeved on the outer walls of both ends of the rotating shaft (9).

5. A prestressed steel bar tensioning device according to claim 4, characterized in that: A rotating rod (13) is inserted in the middle of the support arm (10), and the rotating rod (13) passes through the support arm (10). The support arm (10) and the rotating rod (13) are rotatably connected. A bearing frame (12) is sleeved on the outside of the support arm (10), and the two ends of the rotating rod (13) are connected to the top two ends of the bearing frame (12). The rotating rod (13) and the bearing frame (12) are connected by bolts, and the support arm (10) and the bearing frame (12) are rotatably connected.

6. A prestressed steel bar tensioning device according to claim 4, characterized in that: The support arm (10) has a connecting groove (16) at the bottom of the end away from the positioning rod (8), and the connecting groove (16) is spherical. A spherical connecting seat (15) is installed inside the connecting groove (16), and the spherical connecting seat (15) is rotatably connected to the support arm (10). A push-out hydraulic cylinder (14) is installed at the bottom of the spherical connecting seat (15), and the movable end of the push-out hydraulic cylinder (14) is connected to the spherical connecting seat (15). The bottom of the push-out hydraulic cylinder (14) is installed inside the fixed sleeve (4) near the push-out plate (2) by bolts.

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