Automatic pipe pile prestress traction device

Abstract

The utility model discloses an automatic pipe pile prestress traction device which is arranged on a supporting plate frame and comprises a tensioning oil cylinder, a traction lead screw and the tensioning oil cylinder are concentrically arranged, the traction lead screw penetrates through the tensioning oil cylinder, and the traction lead screw can rotate around the central axis of the traction lead screw through a moving mechanism and move in the direction of the axis of the traction lead screw. The traction lead screw is detachably connected with a pipe pile mold through axial movement and a traction chuck arranged at the front end of the traction lead screw, a piston rod in the tensioning oil cylinder exerts axial thrust on the traction lead screw and acts on the pipe pile mold to achieve tensioning of prestress, and a plurality of supporting ejector rods are arranged on the front side of the supporting plate frame. An auxiliary adjusting device is arranged on the supporting ejector rod, the auxiliary adjusting device adjusts the central axis of the pipe pile mold to be concentric with the axis position of the traction lead screw, a buffering device for reducing the impulsive force of the pipe pile mold is arranged on the auxiliary adjusting device, and locking connection and traction force application on the pipe pile mold can be automatically achieved. And the safety and the efficiency are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe pile production equipment, in particular to an automatic pipe pile prestressed traction device. Background Art

[0002] When making concrete pipe piles, it is necessary to place the steel cage with end plates installed in the pipe pile mold, and then pour concrete into the pipe pile mold to form it. In order to increase the strength of the pipe pile, the pipe pile steel bars need to be prestressed.

[0003] Many processes of the existing traction equipment in the process of prestressing pipe piles are completed by manpower, including manual docking and locking. When manually locking the tensioning machine and the pipe pile mold and tightening the connecting nut, there are certain safety risks during manual operation because of the large load on them. The manual locking and twisting method has low production efficiency. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In order to overcome the shortcomings of the prior art, an automatic pipe pile prestressing traction device is proposed, which can automatically achieve the locking connection of the pipe pile mold and apply traction force, further improving safety and efficiency.

[0006] (II) Technical solution

[0007] The utility model is realized through the following technical scheme: the utility model proposes an automatic prestressed traction device for pipe piles, including a support plate frame, a traction device arranged on the support plate frame, including a tensioning cylinder, a traction screw rod arranged concentrically with the tensioning cylinder and passing through the tensioning cylinder, the traction screw rod can rotate around its central axis and move along the direction of its axis through a moving mechanism, the traction screw rod is detachably connected to the pipe pile mold by axial movement and a traction chuck arranged at its front end, the piston rod in the tensioning cylinder applies axial thrust to the traction screw rod and acts on the pipe pile mold to realize prestressed tensioning, a plurality of support push rods are arranged on the front side of the support plate frame, an auxiliary adjustment device is arranged on the support push rod, the auxiliary adjustment device adjusts the central axis of the pipe pile mold to make it concentric with the axis position of the traction screw rod, and a buffer device is arranged on the auxiliary adjustment device to reduce the impact force of the pipe pile mold.

[0008] Furthermore, the moving mechanism includes a guide rod, on which a first moving plate and a second moving plate are slidably connected, the first moving plate is connected to the piston rod through a bracket plate, the traction screw is threadedly connected to the bracket plate, and the second moving plate is provided with a driving device for driving the traction screw to rotate.

[0009] Furthermore, the driving device includes a driving sprocket driven by a motor, the tail of the traction screw is connected to a driven sprocket, and the driving sprocket is transmission-connected to the driven sprocket.

[0010] Furthermore, the traction chuck is threadedly connected to the head of the traction screw rod, and the traction chuck is provided with an internal thread that is compatible with the screw thread on the pipe pile mold.

[0011] Furthermore, the auxiliary adjustment device includes a front end plate and a rear end plate arranged on the front side of the supporting push rod, the rear end plate is connected to a fixed seat, a self-aligning bearing is arranged at the center of the fixed seat, a nut ring suitable for the nut on the pipe pile mold is arranged in the self-aligning bearing, and the nut ring realizes its rotation through a rotating disk driven by a motor.

[0012] Furthermore, the buffer device includes a spring arranged between the fixing seat and the rear end plate and a buffer block arranged on the front end plate.

[0013] Furthermore, a measuring device for detecting the connection status between the traction screw and the pipe pile mold is also provided on the support top rod. The measuring device includes two symmetrically arranged screws. The two screws are driven by a motor to rotate and drive the detection plate thereon to move along the axial direction of the screw. A corresponding sensor is provided on the detection plate.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model mentions an automatic pipe pile prestressed traction device, which, through the moving mechanism and the tensioning cylinder, automatically realizes that the traction screw can rotate around its central axis and move along the direction of its axis to achieve a detachable connection with the pipe pile mold, thereby avoiding the time and effort of manual operation and improving safety and production efficiency. In addition, an auxiliary adjustment device is provided, which can adjust the central axis of the pipe pile mold to make it concentric with the axis of the traction screw, thereby facilitating the connection between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model.

[0018] Figure 2 It is a cross-sectional schematic diagram of the structure of the utility model.

[0019] Figure 3 It is a structural schematic diagram of the auxiliary adjustment device.

[0020] Figure 4 It is a schematic diagram of the structure of the measuring device.

[0021] Figure 5It is a structural diagram of the pipe pile mold.

[0022] 1-support plate frame; 2-tensioning cylinder; 3-traction screw; 4-moving mechanism; 5-pile mold; 6-support jack; 7-auxiliary adjustment device; 8-buffer device; 9-measuring device; 21-piston rod; 31-traction chuck; 41-guide rod; 42-first moving plate; 43-second moving plate; 44-bracket plate; 45-driving device; 46-threaded cap; 71-front end plate; 72-rear end plate; 73-fixed seat; 74-self-aligning bearing; 75-nut ring; 76-rotating disk; 91-screw; 92-detection plate; 451-driving sprocket; 452-driven sprocket. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] like Figure 1-Figure 3 The automatic prestressed traction device for pipe piles shown in FIG. Figure 5 As shown) and applies thrust to it, increasing the strength of the pipe pile reinforcement, the traction device is arranged on the support plate frame 1, including a tensioning cylinder 2, the tensioning cylinder 2 is connected to a hydraulic pump, a piston rod 21 is arranged in the tensioning cylinder 2 and moves along the direction of its central axis, the piston rod 21 is connected to a support plate 44, a first movable plate 42 is connected to the support plate 44, the front section and the rear section of the traction screw rod 3 are both provided with threads, the traction screw rod 3 is connected to the support plate 44 through the threads of its rear section, and a threaded cap 46 is also connected to the support plate 44, and the threaded cap 46 can increase the support plate 44 The connecting surface with the traction screw rod 3, the traction screw rod 3 passes through the tensioning cylinder 2 and has a clearance fit with the piston rod 21, the first movable plate 42 is slidably connected to the guide rod 41, and a second movable plate 43 is also provided on the guide rod 41. When the piston rod 21 moves backward under the hydraulic thrust, it can drive the bracket plate 44 to move backward, and at the same time drive the first movable plate 42 to move along the guide rod 41, so that the traction screw rod 3 can move backward along the axis direction of the piston rod 21. Similarly, when the piston rod 21 moves forward, it can also drive the traction screw rod 3 to move forward along the axis direction of the piston rod 21.

[0025] A driven sprocket 452 is provided at the tail of the traction screw rod 3, and the driven sprocket 452 is connected to the driving sprocket 451 through a chain. The driving sprocket 451 is driven by a motor arranged on the second movable plate 43, and can drive the traction screw rod 3 to rotate around the central axis. When the traction screw rod 3 rotates, the piston rod 21 is in a stationary state. The traction screw rod 3 can move along the axial direction of the piston rod 21 when rotating, and the forward and backward movement along the axial direction of the piston rod 21 can be realized by the forward and reverse rotation of the motor. When the traction screw rod 3 moves, it can drive the second movable plate 43 to move, thereby realizing the movement of the entire driving device 45.

[0026] A traction chuck 31 is threadedly connected to the front head of the traction screw rod 3, and the traction chuck 31 is provided with an internal thread that is compatible with the screw thread on the pipe pile mold 5. Therefore, when the traction screw rod 3 rotates and moves forward, a detachable connection with the pipe pile mold 5 can be achieved. When the traction screw rod 3 is connected to the pipe pile mold 5, the tensioning cylinder 2 can be used to apply traction to it.

[0027] Four supporting mandrels 6 are arranged in an array on the supporting plate frame 1, and an auxiliary adjusting device 7 for adjusting the central axis of the pipe pile mold 5 to make it concentric with the axis position of the traction screw rod 3 is arranged on the supporting mandrel 6. The auxiliary adjusting device 7 includes a front end plate 71 and a rear end plate 72 arranged on the front side of the supporting mandrel 6. The front end plate 71 and the rear end plate 72 are arranged at intervals. A fixing seat 73 is arranged between the front end plate 71 and the rear end plate 72 and is slidably connected with them on the support rod on the rear end plate 72. A self-aligning bearing 74 is arranged at the center of the fixing seat 73. A nut ring 75 suitable for the nut on the pipe pile mold 5 is arranged in the self-aligning bearing 74. The nut ring 75 realizes its rotation through a rotating disk 76 driven by a motor. The nut on the pipe pile mold 5 can be engaged in the nut ring 75. When the central axis of the pipe pile mold 5 is not concentric with the axis position of the traction screw rod 3, the swing of the self-aligning bearing 74 is used to adjust the deviation. The nut 75 is rotated to the left of the screwdriver, and the nut 75 is rotated to the right of the screwdriver.

[0028] like Figure 4As shown, in order to detect the connection status between the traction screw rod 3 and the pipe pile mold 5, a measuring device 9 is arranged on the supporting top rod 6, and the measuring device 9 includes two symmetrically arranged screw rods 91. The two screw rods 91 are driven by a motor to rotate and drive the detection plate 92 thereon to move along the direction of the axis of the screw rod 91. A cross-beam sensor (not shown in the figure) is arranged on the detection plate 92. Through the back and forth movement of the cross-beam sensor, it can be detected whether the traction screw rod 3 and the pipe pile mold 5 are connected.

[0029] The utility model discloses an automatic prestressed traction device for pipe piles, which uses a PLC controller to realize automatic control. The specific working process is as follows: align the pipe pile mold 5 with the traction device, and when the end plate of the pipe pile mold 5 contacts the front end plate 71, the nut thereon contacts the nut collar 75. At this time, the rotating disk 76 can drive the nut collar 75 to rotate a certain angle, so that the angle of the nut collar 75 is the same as the angle of the nut on the pipe pile mold 5, which is convenient for fitting. When the fitting is completed, the self-aligning bearing 74 is used to adjust the central axis of the pipe pile mold 5 to make it concentric with the axis position of the traction screw rod 3. At this time, the controller controls the driving device 45 to drive the nut collar 75 to rotate at a certain angle. The movable traction screw 3 rotates forward, moves forward axially while rotating, and is connected to the screw of the pipe pile mold 5 through the traction chuck 31. After detecting the connection between the two, the measuring device 9 controls the oil pump to tension the oil pump in the oil cylinder 2, thereby causing the piston rod 21 to move backward. While moving, it drives the traction screw 3 to move backward to apply a backward traction force to the pipe pile mold 5, and maintains the pressure for a period of time. When the pressure maintenance is completed, the driving device 45 drives the traction screw 3 to rotate in the opposite direction, so that the two are out of contact. After detecting that the two are out of contact, the piston rod 21 is reset, that is, the tensioning and traction of the pipe pile mold 5 is completed, and then the pipe pile mold 5 can be dragged out.

[0030] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary personnel in the field to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents of the present invention for protection have been fully recorded in the claims.

Claims

1. An automatic pipe pile prestressing traction device, comprising a support plate frame (1), characterized in that: The traction device is arranged on the support plate frame (1), and comprises a tensioning cylinder (2). A traction screw (3) is arranged concentrically with the tensioning cylinder (2) and penetrates the tensioning cylinder (2). The traction screw (3) can rotate around its central axis and move along the direction of its axis through a moving mechanism (4). The traction screw (3) is detachably connected to the pipe pile mold (5) by axial movement and using a traction chuck (31) arranged at its front end. The piston rod (21) in the tensioning cylinder (2) applies an axial thrust to the traction screw (3) and acts on the pipe pile mold (5) to achieve prestressed tensioning. A plurality of support push rods (6) are arranged on the front side of the support plate frame (1). An auxiliary adjustment device (7) is arranged on the support push rod (6). The auxiliary adjustment device (7) adjusts the central axis of the pipe pile mold (5) so that it is concentric with the axis of the traction screw (3). The auxiliary adjustment device (7) is provided with a buffer device (8) for reducing the impact of the pipe pile mold (5).

2. The automatic pipe pile prestressing traction device according to claim 1 is characterized in that: The moving mechanism (4) comprises a guide rod (41), a first moving plate (42) and a second moving plate (43) being slidably connected to the guide rod (41), the first moving plate (42) being connected to the piston rod (21) via a bracket plate (44), the traction screw (3) being threadedly connected to the bracket plate (44), and the second moving plate (43) being provided with a driving device (45) for driving the traction screw (3) to rotate.

3. The automatic pipe pile prestressing traction device according to claim 2 is characterized in that: The driving device (45) comprises a driving sprocket (451) driven by a motor, the tail of the traction screw rod (3) is connected to a driven sprocket (452), and the driving sprocket (451) is transmission-connected to the driven sprocket (452).

4. The automatic pipe pile prestressing traction device according to claim 1 is characterized in that: The traction chuck (31) is threadedly connected to the head of the traction screw rod (3), and the traction chuck (31) is provided with an internal thread that is compatible with the screw thread on the pipe pile mold (5).

5. The automatic pipe pile prestressing traction device according to claim 1 is characterized in that: The auxiliary adjustment device (7) comprises a front end plate (71) and a rear end plate (72) arranged on the front side of the supporting top rod (6); the rear end plate (72) is connected to a fixing seat (73); a self-aligning bearing (74) is arranged at the center of the fixing seat (73); a nut ring (75) suitable for a nut on the pipe pile mold (5) is arranged in the self-aligning bearing (74); the nut ring (75) is rotated by a rotating disk (76) driven by a motor.

6. The automatic pipe pile prestressing traction device according to claim 5 is characterized in that: The buffer device (8) comprises a spring arranged between a fixing seat (73) and a rear end plate (72) and a buffer block arranged on a front end plate (71).

7. The automatic pipe pile prestressing traction device according to claim 1 is characterized in that: The supporting top rod (6) is also provided with a measuring device (9) for detecting the connection state between the traction screw rod (3) and the pipe pile mold (5), and the measuring device (9) comprises two symmetrically arranged screw rods (91), the two screw rods (91) are driven by a motor to rotate and drive the detection plate (92) thereon to move along the axial direction of the screw rod (91), and the detection plate (92) is provided with a corresponding radiation sensor.

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