Concrete pipe pile steel bar pre-tensioning drawing machine

Abstract

The utility model relates to concrete pipe pile production technical field especially relates to a kind of concrete pipe pile reinforcing steel pre-tensioning tensioning machine, including base, fixed frame is equipped in the top of base, fixed frame is set on lifting frame, and lifting frame is fixed on base, cylinder is equipped in fixed frame, and the one end of cylinder is connected with the pusher that drives cylinder to carry out linear motion;Sleeve is equipped in the other end of cylinder, annular slide rail is coaxially equipped along the outer wall of sleeve, and sliding block is slidably installed on slide rail, and sliding block is fixed with sleeve, driving mechanism that drives sleeve rotation is arranged on sleeve, three interval arranged pressing plate is equipped in the inboard of sleeve, and third hydraulic cylinder is vertically installed on the side of pressing plate.The utility model can adapt to nut of different sizes by setting the pressing plate structure that can be adjusted radially, cooperate third hydraulic cylinder drive, can realize quick clamping and tensioning, need not frequently replace sleeve wrench, significantly improve tensioning efficiency and equipment applicability.

Description

Technical Field

[0001] This utility model relates to the field of concrete pipe pile production technology, and in particular to a pre-tensioning machine for reinforcing steel bars in concrete pipe piles. Background Technology

[0002] The pre-tensioning machine for pipe pile reinforcement is a special equipment used to apply prestress to the reinforcement of pipe piles. It realizes the tensioning, anchoring and force control of the reinforcement through hydraulic or electric systems to ensure the strength and stability of the pipe pile structure. It applies tension to the reinforcement through mechanical or hydraulic means to keep it in a prestressed state in the component, thereby improving crack resistance and load-bearing capacity.

[0003] When using a pre-tensioning machine for concrete pipe pile reinforcement to pre-tension the reinforcement, a socket wrench is needed to be placed on the nut and rotate it to pre-tension the reinforcement. However, since the diameter of the nuts fitted to concrete pipe piles varies with their diameter, the socket wrench needs to be changed according to the different nuts, which slows down the operation. Therefore, we propose a pre-tensioning machine for concrete pipe pile reinforcement. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned shortcomings in the existing technology by proposing a pre-tensioning machine for reinforced concrete pipe piles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a pre-tensioning machine for concrete pipe pile reinforcement, including a base, a fixed frame provided above the base, the fixed frame being set on a lifting frame and the lifting frame being fixed on the base, a cylinder being provided inside the fixed frame, and a pusher connected to one end of the cylinder to drive the cylinder to move linearly. A sleeve is provided inside the other end of the cylinder. An annular slide rail is provided coaxially along the outer wall of the sleeve. A slider is slidably installed on the slide rail and fixed to the sleeve. A drive mechanism is provided on the sleeve to drive the sleeve to rotate. Three pressure plates are arranged at intervals on the inner side of the sleeve. A third hydraulic cylinder is vertically installed on the side of the pressure plate. The piston rod of the third hydraulic cylinder slides through the sleeve and is fixed to the outer wall of the sleeve by a bracket.

[0006] Preferably, the lifting frame includes a top plate located above the base, and support legs are installed at the bottom corners of the top plate. The bottom of the support legs is fixed to the base. A first hydraulic cylinder is installed on the top of the top plate, and the bottom of the first hydraulic cylinder is fixed to the fixed frame.

[0007] Preferably, at least one first guide shaft is provided parallel to the side of the first hydraulic cylinder, the bottom of the first guide shaft is fixed to the fixed frame, and the other end of the first guide shaft slides through the top plate.

[0008] Preferably, a control box is installed on the side of one of the support legs, the control box contains a controller, and a hydraulic station is installed on the base. The hydraulic station is connected to the first hydraulic cylinder and the third hydraulic cylinder respectively through conduits, and the hydraulic station is connected to the controller through wires.

[0009] Preferably, the pushing component includes a second hydraulic cylinder, which is connected to a hydraulic station via a conduit and is mounted on a support frame. The end of the support frame is fixed to a fixed frame, and the end of the second hydraulic cylinder is fixed to a cylinder. At least one second guide shaft is provided parallel to the strawberry amine in the second hydraulic cylinder. One end of the second guide shaft is fixed to the cylinder, and the other end of the second guide shaft slides through the support frame.

[0010] Preferably, the drive mechanism includes a first bevel gear in the shape of an annulus, which is coaxially mounted on a sleeve, and a second bevel gear meshes with the side of the first bevel gear. A drive motor is connected to the second bevel gear via a rotating shaft. The drive motor is connected to a controller via a wire, and the drive motor is fixed to the outer wall of the cylinder by a bracket. The rotating shaft is rotatably connected to the cylinder.

[0011] Preferably, a support plate is slidably installed inside the cylinder, and a chuck is coaxially installed on the side of the support plate near the sleeve.

[0012] Preferably, a support base is provided at the bottom of the cylinder, and the support base is fixed to the fixed frame.

[0013] The design scheme proposed in this utility model has the following beneficial effects in application: 1. This utility model, by setting a radially adjustable pressure plate structure and cooperating with a third hydraulic cylinder drive, can adapt to nuts of different sizes, realize quick clamping and tensioning, eliminate the need for frequent changes of socket wrenches, and significantly improve tensioning efficiency and equipment applicability.

[0014] 2. By setting up a lifting frame, guide shaft and support base, this utility model enhances the stability and motion accuracy of the overall equipment, ensuring accurate alignment between the steel bar and the equipment during the tensioning process, and smooth and reliable operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is the front view of the present invention; Figure 4 This is a schematic diagram of the internal structure of the cylinder of this utility model.

[0016] In the diagram: 1. Base; 2. Top plate; 3. Support leg; 4. Fixed frame; 5. First hydraulic cylinder; 6. First guide shaft; 7. Control box; 8. Support frame; 9. Second hydraulic cylinder; 10. Second guide shaft; 11. Cylinder; 12. Sleeve; 13. Third hydraulic cylinder; 14. Pressure plate; 15. First bevel gear; 16. Second bevel gear; 17. Drive motor; 18. Slider; 19. Slide rail; 20. Chuck; 21. Support plate; 22. Support base. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Example Reference Figures 1-4 A pre-tensioning machine for reinforced concrete pipe piles includes a base 1, a fixed frame 4 above the base 1, the fixed frame 4 being mounted on a lifting frame and fixed to the base 1, wherein the lifting frame includes a top plate 2, the top plate 2 being located above the base 1, and support legs 3 being installed at the bottom corners of the top plate 2, the bottom of the support legs 3 being fixed to the base 1, and a first hydraulic cylinder 5 being installed on the top of the top plate 2, the bottom of the first hydraulic cylinder 5 being fixed to the fixed frame 4, allowing the fixed frame 4 to move freely up and down above the base 1, thereby allowing the fixed frame 4 to be aligned with the concrete pipe pile.

[0019] Furthermore, at least one first guide shaft 6 is provided parallel to the side of the first hydraulic cylinder 5. The bottom of the first guide shaft 6 is fixed to the fixed frame 4, and the other end of the first guide shaft 6 slides through the top plate 2 to provide guidance for the lifting and lowering of the fixed frame 4, thereby improving the lifting and lowering stability of the fixed frame 4.

[0020] In actual use, the base 1 can be mounted on a linear motor, thereby driving the base 1 to perform horizontal linear motion. This allows for continuous processing of multiple parallel concrete pipe piles, ensuring that the loading and unloading of concrete pipe piles does not affect the pre-tensioning operation of the reinforcing steel bars in batches of concrete pipe piles.

[0021] A cylinder 11 is provided inside the fixed frame 4. One end of the cylinder 11 is connected to a pusher that drives the cylinder 11 to move linearly. The pusher includes a second hydraulic cylinder 9, which is mounted on a support frame 8. The end of the support frame 8 is fixed to the fixed frame 4, and the end of the second hydraulic cylinder 9 is fixed to the cylinder 11, allowing the cylinder 11 to move horizontally linearly within the fixed frame 4. That is, after the port of the fixed frame 4 is pressed against the end of the concrete pipe pile, the cylinder 11 can be pushed onto the screw at the end of the concrete pipe pile.

[0022] Furthermore, at least one second guide shaft 10 is provided parallel to the strawberry amine in the second hydraulic cylinder 9. One end of the second guide shaft 10 is fixed on the cylinder 11, and the other end of the second guide shaft 10 slides through the support frame 8 to guide the horizontal linear movement of the cylinder 11, thereby improving the stability of the cylinder 11 when it moves linearly.

[0023] A support seat 22 is provided below the cylinder 11. The support seat 22 is fixed on the fixed frame 4 and can provide support for the cylinder 11, ensuring that the weight of the cylinder 11 will not directly act on the second guide shaft 10 and the second hydraulic cylinder 9, thereby causing the second hydraulic cylinder 9 and the second guide shaft 10 to be bent and damaged, affecting the linear movement of the cylinder 11.

[0024] A sleeve 12 is provided inside the other end of the cylinder 11. An annular slide rail 19 is coaxially arranged along the outer wall of the sleeve 12. A slider 18 is slidably mounted on the slide rail 19 and fixed to the sleeve 12, allowing the sleeve 12 to rotate within the cylinder 11. A drive mechanism for rotating the sleeve 12 is provided on the sleeve 12. Three spaced pressure plates 14 are provided on the inner side of the sleeve 12. A third hydraulic cylinder 13 is vertically mounted on the side of the pressure plates 14. The piston rod of the third hydraulic cylinder 13 slides through... The sleeve 12 is inserted, and the third hydraulic cylinder 13 is fixed to the outer wall of the sleeve 12 by the bracket. As the cylinder 11 moves to the end of the concrete pipe pile, the sleeve 12 will be fitted onto the screw of the concrete pipe pile until it moves to the nut. Then the third hydraulic cylinder 13 will push the pressure plate 14 closer to the nut, thereby pressing it on the plane on the side of the nut, thus limiting and clamping the nut at multiple angles. Then, under the operation of the drive mechanism, the sleeve 12 can be driven to rotate, so that the nut is tightened on the screw.

[0025] Specifically, a hydraulic station is installed on the base 1. The hydraulic station is connected to the first hydraulic cylinder 5, the second hydraulic cylinder 9, and the third hydraulic cylinder 13 through conduits. When the sleeve 12 rotates, if the sleeve 12 makes a full circumference rotation, it is easy to cause the conduit on the third hydraulic cylinder 13 to be wound and damaged. Therefore, in actual use, the sleeve 12 can be controlled to rotate back and forth inside the cylinder 11, that is, the sleeve 12 can make a one-third circumference reciprocating rotation. When the sleeve 12 rotates forward to tighten the nut, the third hydraulic cylinder 13 will control the pressure plate 14 to press on the side of the nut. Then, when the sleeve 12 rotates in reverse, the third hydraulic cylinder 13 will pull the pressure plate 14 away from the nut, and control the pressure plate 14 to press on the side of the nut again when the sleeve 12 is about to make the next forward rotation. This can prevent the conduit from being damaged due to excessive winding.

[0026] Alternatively, the hydraulic station can use another hydraulic oil delivery method with the third hydraulic cylinder 13. That is, the slide rail 19 and the slider 18 are hollow, and the side of the slider 18 is connected to the slide rail 19 through a sealed bearing, so that a sealed cavity is formed between the slide rail 19 and the slider 18. The conduit of the hydraulic station is connected to the slide rail 19, so that hydraulic oil can be delivered to the cavity between the slide rail 19 and the slider 18. The slider 18 is a hollow shell, and the conduit on the third hydraulic cylinder 13 is directly connected to the slider 18. The slider 18 is also provided with a through hole that communicates with the cavity between the slide rail 19 and the slider 18, so that the hydraulic cylinder in the cavity can flow into the slider 18. In this way, even if the sleeve 12 rotates continuously, it will not affect the conduit on the third hydraulic cylinder 13.

[0027] Furthermore, the drive mechanism includes a first bevel gear 15 in the shape of an annulus, which is coaxially mounted on the sleeve 12. A second bevel gear 16 meshes with the side of the first bevel gear 15. A drive motor 17 is connected to the second bevel gear 16 via a rotating shaft. The drive motor 17 is fixed to the outer wall of the cylinder 11 by a bracket, and the rotating shaft is rotatably connected to the cylinder 11 to provide power for the rotation of the sleeve 12.

[0028] Specifically, a control box 7 is installed on the side of one of the support legs 3. The control box 7 contains a controller, which is connected to the drive motor 17 via wires. The hydraulic station is also connected to the controller via wires. In actual use, the controller is one of the following: a PLC logic controller, a control motherboard, or a control host.

[0029] It should be noted that a support plate 21 is slidably installed inside the cylinder 11, meaning that the support plate 21 can move and slide inside the cylinder 11. A chuck 20 is coaxially installed on the side of the support plate 21 near the sleeve 12, meaning that the chuck 20 can slide inside the cylinder 11. When the cylinder 11 is fitted onto the screw, the chuck 20 will clamp onto the end of the screw, thereby fixing the concrete pipe pile and preventing the concrete pipe pile from accidentally shaking or rotating when the nut is turned, thus ensuring the nut is tightened during the screw tightening process.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pre-tensioning machine for reinforcing steel bars in concrete pipe piles, characterized in that: Includes a base (1), a fixed frame (4) is provided above the base (1), the fixed frame (4) is set on the lifting frame and the lifting frame is fixed on the base (1), a cylinder (11) is provided inside the fixed frame (4), and one end of the cylinder (11) is connected to a pusher that drives the cylinder (11) to move linearly; A sleeve (12) is provided inside the other end of the cylinder (11). A ring-shaped slide rail (19) is provided coaxially along the outer wall of the sleeve (12). A slider (18) is slidably installed on the slide rail (19). The slider (18) is fixed to the sleeve (12). A drive mechanism for rotating the sleeve (12) is provided on the sleeve (12). Three spaced pressure plates (14) are provided on the inner side of the sleeve (12). A third hydraulic cylinder (13) is vertically installed on the side of the pressure plate (14). The piston rod of the third hydraulic cylinder (13) slides through the sleeve (12). The third hydraulic cylinder (13) is fixed to the outer wall of the sleeve (12) by a bracket.

2. The pre-tensioning machine for reinforcing steel bars in concrete pipe piles according to claim 1, characterized in that: The lifting frame includes a top plate (2), which is located above the base (1). Support legs (3) are installed at the bottom corners of the top plate (2). The bottom of the support legs (3) is fixed on the base (1). A first hydraulic cylinder (5) is installed on the top of the top plate (2). The bottom of the first hydraulic cylinder (5) is fixed to the fixed frame (4).

3. The pre-tensioning machine for reinforcing steel bars in concrete pipe piles according to claim 2, characterized in that: At least one first guide shaft (6) is provided parallel to the side of the first hydraulic cylinder (5). The bottom of the first guide shaft (6) is fixed on the fixed frame (4), and the other end of the first guide shaft (6) slides through the top plate (2).

4. The pre-tensioning machine for reinforcing steel bars in concrete pipe piles according to claim 2, characterized in that: A control box (7) is installed on the side of one of the support legs (3). A controller is installed inside the control box (7), and a hydraulic station is installed on the base (1). The hydraulic station is connected to the first hydraulic cylinder (5) and the third hydraulic cylinder (13) through conduits, and the hydraulic station is connected to the controller through wires.

5. A pre-tensioning machine for reinforcing steel bars in concrete pipe piles according to claim 4, characterized in that: The pusher includes a second hydraulic cylinder (9), which is connected to a hydraulic station via a conduit. The second hydraulic cylinder (9) is mounted on a support frame (8), the end of which is fixed to a fixed frame (4). The end of the second hydraulic cylinder (9) is fixed to a cylinder (11). At least one second guide shaft (10) is provided parallel to the second hydraulic cylinder (9). One end of the second guide shaft (10) is fixed to the cylinder (11), and the other end of the second guide shaft (10) slides through the support frame (8).

6. A pre-tensioning machine for reinforcing steel bars in concrete pipe piles according to claim 4, characterized in that: The drive mechanism includes a ring-shaped first bevel gear (15), which is coaxially mounted on a sleeve (12). A second bevel gear (16) meshes with the side of the first bevel gear (15). A drive motor (17) is connected to the second bevel gear (16) via a rotating shaft. The drive motor (17) is connected to the controller via a wire. The drive motor (17) is fixed to the outer wall of the cylinder (11) by a bracket, and the rotating shaft is rotatably connected to the cylinder (11).

7. A pre-tensioning machine for reinforcing steel bars in concrete pipe piles according to claim 4, characterized in that: A support plate (21) is slidably installed inside the cylinder (11), and a chuck (20) is coaxially installed on the side of the support plate (21) near the sleeve (12).

8. A pre-tensioning machine for reinforcing steel bars in concrete pipe piles according to claim 4, characterized in that: A support base (22) is provided below the cylinder (11), and the support base (22) is fixed on the fixed frame (4).

Images