Tensioning device and tensioning machine

Abstract

This application relates to a tensioning device and a tensioning machine. The tensioning machine includes a tensioning unit and a control unit. The tensioning unit includes a housing, a tensioning rod assembly, and a detection assembly. The tensioning rod assembly has a tensioning head. The tensioning rod assembly can rotate relative to the housing around its own central axis and advance along its own axial direction to engage with the tensioning screw, or it can retract relative to the housing along its axial direction to tension the member to be tensioned. The detection assembly is disposed on the housing and is used to measure the relative position between the tensioning head and the tensioning screw. Based on the measurement result, it sends a measurement signal to the control unit, so that the control unit can control the tensioning head to be coaxially aligned with the tensioning screw based on the measurement signal, and control the tensioning head and the tensioning screw to engage with each other to a preset length, thereby realizing fully automatic alignment and fully automatic tensioning. This not only improves production efficiency and reduces the labor intensity of workers, but also allows the tensioning station to be set as an unmanned operation station, effectively avoiding the risk of personal injury.

Description

Technical Field

[0001] This application relates to the field of building pipe pile production technology, and in particular to a tensioning device and tensioning machine. Background Technology

[0002] With the development of concrete technology, the technology of concrete pipe piles has become increasingly mature. Besides industrial and civil construction, they are widely used in bridges, ports, railways, and water conservancy projects. In the production of concrete pipe piles, firstly, a reinforcing cage with end plates is placed in a pipe pile mold; then, concrete is fed into the mold, followed by a series of steps including centrifugation, primary steam curing, demolding, and advanced steam curing to obtain the pipe pile. To enable the prepared pipe pile to withstand higher loads during use, a prestressing tensioning step must be added before the centrifugation step. Specifically, the reinforcing cage in the pipe pile mold is stretched using a tensioning machine, and the cage is kept under tension during the subsequent primary steam curing, demolding, and advanced steam curing steps, thereby improving the load-bearing capacity of the resulting pipe pile.

[0003] In existing technologies, the tensioning process usually requires manual operation. However, manual tensioning has many drawbacks. Specifically, the entire tensioning process is controlled manually, making it impossible to achieve automatic alignment and tensioning. This results in low work efficiency, high labor intensity for workers, and poor working conditions. Furthermore, there is a risk of personal injury due to steel bar breakage during the tensioning process, thus posing certain safety hazards. Summary of the Invention

[0004] Therefore, it is necessary to provide a tensioning device and tensioning machine that can achieve fully automatic tensioning, which addresses the problems of low work efficiency, high labor intensity for workers, and safety hazards caused by the existing tensioning process being operated manually.

[0005] According to one aspect of this application, a tensioning device is provided, comprising:

[0006] The casing has a tail end and a head end that are positioned opposite each other along its own axial direction;

[0007] The tension rod assembly is movably and coaxially inserted into the housing at one end along the axial direction. The end of the tension rod assembly inserted into the housing has a tensioning head for engaging the tensioning screw of the member to be tensioned. The tension rod assembly can rotate relative to the housing about its own central axis and move along the axial direction toward the member to be tensioned to engage the tensioning screw, or it can move relative to the housing along the axial direction away from the member to be tensioned to tension the member.

[0008] A detection component is located at the head end. The detection component is used to measure the relative position between the tensioning head and the tensioning screw, and to send a measurement signal to an external control unit based on the measured relative position, so that the control unit can control the tensioning head to coaxially align with the tensioning screw based on the measurement signal, and control the tensioning head and the tensioning screw to mesh with each other to a preset length.

[0009] In one embodiment, the housing includes a body and a piston rod arranged coaxially. The body has cavities extending through opposite ends of itself in the axial direction. The piston rod is movably inserted into the cavity and closes the tail end. The piston rod has piston holes extending through opposite ends of itself in the axial direction.

[0010] When the tension rod assembly engages the tension screw, the tension rod assembly rotates independently about its own central axis relative to the machine body and the piston rod and moves along the axial direction toward the member to be tensioned;

[0011] When the tensioning rod assembly tensions the member to be tensioned, the tensioning rod assembly engages with the tensioning screw and moves together with the piston rod relative to the machine body along the axial direction away from the member to be tensioned.

[0012] In one embodiment, the tension rod assembly further includes a tension rod, a sleeve, and an unlocking member, the sleeve being connected to one end of the tension rod in the axial direction, and the unlocking member being movably disposed within the sleeve and removable from the sleeve;

[0013] When the unlocking element is located inside the sleeve, the tensioning head is inserted into the sleeve and abuts against the unlocking element, so that the tensioning head and the sleeve are locked together.

[0014] When the unlocking component is removed from the sleeve, the tensioning head can rotate around its own central axis relative to the sleeve and the tensioning rod by an angle and then separate from the sleeve.

[0015] In one embodiment, the sleeve has a receiving cavity, and the sleeve has an insertion hole with a diameter smaller than the receiving cavity and communicating with the receiving cavity on one side of the axial direction. The inner circumferential surface of the insertion hole has a plurality of grooves spaced apart along the circumferential direction of the insertion hole and communicating with the receiving cavity. The outer circumferential surface of the tensioning head has a plurality of protrusions spaced apart along the circumferential direction of the tensioning head. Correspondingly, there are a plurality of unlocking members. The plurality of protrusions and the plurality of unlocking members are adjacent to and alternately arranged along the circumferential direction of the sleeve. At least a portion of each protrusion and each unlocking member is disposed in the receiving cavity, and each protrusion abuts against the sidewall of the adjacent unlocking member and the receiving cavity.

[0016] All of the unlocking components can be removed from the sleeve through the groove, so that after the tensioning head rotates at an angle relative to the sleeve, the protrusion can be positioned in the corresponding groove and can exit the receiving cavity through the groove, thereby disengaging the tensioning head from the sleeve.

[0017] In one embodiment, the detection assembly includes a bracket and a first detection element, a second detection element, a third detection element, and a fourth detection element disposed on the bracket; the bracket is connected to the housing, the first detection element is disposed on the bracket directly above the head end, the second detection element is disposed on both sides of the head end along the radial direction of the housing, and the fourth detection element is spaced apart from the second detection element in the axial direction and disposed on both sides of the bracket along the radial direction of the housing;

[0018] The first detection element is used to measure the distance between the tensioning screw and the first detection element; the second detection element is used to detect the diameter of the tensioning screw and the starting position of the thread on the tensioning screw; the third detection element is used to measure the distance between the head end and the tensioning baffle of the member to be tensioned; and the fourth detection element is used to measure the position of the tensioning head inside the housing and the distance the tensioning screw extends into the housing.

[0019] In one embodiment, the tensioning device further includes a nut locking assembly disposed at the head end. The nut locking assembly has a nut sleeve coaxially disposed with the housing. The nut sleeve is used to be sleeved on the tensioning nut of the member to be tensioned and can be controllably rotated about its own central axis to lock the tensioning nut.

[0020] In one embodiment, the nut locking assembly further includes:

[0021] The base is fixedly connected to the housing;

[0022] Inner seat; rotatably connected to the machine base via bearings, the nut sleeve is coaxially disposed on one side of the inner seat in the axial direction and is detachably snapped into the inner seat;

[0023] The transmission mechanism is coaxially connected to the side of the inner seat away from the nut sleeve in the axial direction and is detachably connected to the nut sleeve. The transmission mechanism can controllably drive the inner seat to rotate relative to the machine base about its own central axis and drive the nut sleeve to rotate synchronously about its own central axis.

[0024] In one embodiment, the tensioning device further includes at least two anti-sway components, at least two of the anti-sway components being arranged radially on opposite sides of the housing, each of the anti-sway components having at least one positioning mechanism, each of the positioning mechanisms being controllably movable radially away from the housing and abutting against a column located on the radially upward side of the housing.

[0025] Each of the positioning mechanisms includes a first positioning member and a second positioning member arranged perpendicularly to each other. The first positioning member is used to abut against the side of the column in the radial direction to limit the displacement of the tensioning device relative to the column in the radial direction. The second positioning member is used to abut against the side of the column in the axial direction to limit the displacement of the tensioning device relative to the column in the axial direction.

[0026] In one embodiment, the tensioning device further includes a lubrication assembly disposed on the housing. The lubrication assembly includes a rotary cylinder, a lubrication pump, and a lubrication pipeline. The lubrication pipeline is connected to the rotary cylinder, and one end of the lubrication pipeline is connected to the lubrication pump. The opposite end of the lubrication pipeline is provided with a lubrication nozzle. The rotary cylinder can drive the lubrication pipeline to rotate about an axis relative to the housing so that the lubrication nozzle can be inserted into the tensioning head.

[0027] According to another aspect of this application, a tensioning machine is provided, comprising:

[0028] The first frame is equipped with the first drive mechanism;

[0029] The second frame is provided with a second drive mechanism and a third drive mechanism, and the second frame is movably connected to the first frame through the second drive mechanism;

[0030] The tensioning device described above is mounted on the second frame and is connected to the third drive mechanism. The first drive mechanism drives the first frame, the second frame, and the tensioning device to move left and right relative to the member to be tensioned along a first horizontal direction. The second drive mechanism drives the second frame and the tensioning device to move back and forth relative to the member to be tensioned along a second horizontal direction perpendicular to the first horizontal direction. The third drive mechanism drives the tensioning device to move up and down relative to the member to be tensioned along the height direction.

[0031] The control unit is communicatively connected to the detection component of the tensioning device. The control unit is used to control the first drive mechanism, the second drive mechanism and the third drive mechanism to drive the tensioning device to move according to the measurement signal emitted by the detection component so that the tensioning head is aligned with the member to be tensioned, and to control the tensioning device to automatically tension the member to be tensioned.

[0032] The aforementioned tensioning device and tensioning machine, by setting a detection component on the tensioning device, setting a first drive mechanism on the first frame of the tensioning machine, setting a second drive mechanism and a third drive mechanism on the second frame, and movably setting the tensioning device on the second frame, and setting a control unit in the tensioning machine, enable the detection component to measure the relative position between the tensioning head and the tensioning screw of the member to be tensioned, and send a measurement signal to the control unit based on the measured relative position. Then, the control unit can control the first drive mechanism to drive the first frame, the second frame and the tensioning device to move left and right together along the first horizontal direction relative to the member to be tensioned, control the second drive mechanism to drive the second frame and the tensioning device to move back and forth together along the second horizontal direction perpendicular to the first horizontal direction relative to the member to be tensioned, and control the third drive mechanism to drive the tensioning device to move up and down relative to the member to be tensioned along the height direction, so as to achieve automatic alignment of the tensioning head and the tensioning screw, so that the tensioning head can smoothly engage with the tensioning screw in one go. Finally, after the tensioning head and the tensioning screw are engaged, the control unit controls the tensioning device to automatically tension the member to be tensioned. This enables fully automatic alignment and tensioning of the tensioning machine. Compared to manual alignment and tensioning, it eliminates the need for manual operation and intervention, thereby improving production efficiency, reducing labor intensity, improving the overall working environment, and allowing the tensioning station in the production line to be set as an unmanned operation station, effectively avoiding the risk of personal injury. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a tube mold provided in an embodiment of this application.

[0034] Figure 2 This is a schematic diagram of the tensioning machine and the tube mold being aligned according to an embodiment of this application.

[0035] Figure 3 This is an axonometric view of a tensioning machine provided in an embodiment of this application.

[0036] Figure 4 Axonometric view of a rack provided in an embodiment of this application.

[0037] Figure 5 Axial view of a tensioning device provided in an embodiment of this application Figure 1 .

[0038] Figure 6 This is an axonometric view showing the connection between the tension rod assembly and the tail section component according to an embodiment of this application.

[0039] Figure 7 This is a cross-sectional view of the casing structure provided in one embodiment of this application.

[0040] Figure 8 An exploded view of a tensioning head assembly provided in an embodiment of this application.

[0041] Figure 9 This is an axonometric view of a detection component provided in an embodiment of this application.

[0042] Figure 10 This is an isometric view of a nut locking assembly provided in an embodiment of this application.

[0043] Figure 11 This is a cross-sectional view of a nut locking assembly provided in an embodiment of this application.

[0044] Figure 12 for Figure 10 An enlarged schematic diagram of region A in the middle.

[0045] Figure 13 Axial view of a tensioning device provided in an embodiment of this application Figure 2 .

[0046] Figure 14 for Figure 13 Enlarged schematic diagram of region B in the middle.

[0047] Figure 15 for Figure 3 A magnified view of region C in the middle.

[0048] Figure 16 for Figure 13 A magnified diagram of region D in the middle.

[0049] Explanation of reference numerals in the attached figures:

[0050] 10. Tube mold; 11. Bottom mold; 12. Cover mold; 13. Tensioning baffle; 131. Tensioning screw; 14. Tensioning nut; 20. Tensioning machine; 200. Frame; 210. First frame; 220. Second frame; 221. Column; 222. Fixing plate; 223. Lifting plate; 230. Guide rail; 300. Tensioning device; 301. Head end; 302. Tail end; 310. Housing; 311. Body; 3111. Cavity; 3112. Jack cylinder; 3113. Head assembly; 312. Piston rod; 3121. Piston hole; 313. First linear bearing; 314. Linear guide rail; 315, Second linear bearing; 316, Spring; 320, Tensioning rod assembly; 321, Tensioning head; 3211, Protrusion; 3212, Screw hole; 3213, Mud removal groove; 322, Tensioning rod; 323, Tail nut; 324, Sleeve; 3241, Receiving cavity; 3242, Insertion hole; 3243, Groove; 3244, Through hole; 325, Unlocking component; 3251, Bolt; 3252, Pad; 326, Mounting base; 327, Guide shaft; 330, Detection assembly; 331, Bracket; 3311, First support arm; 3312, Second support arm; 3313, Light curtain Frame; 332, First detection element; 333, Second detection element; 334, Third detection element; 335, Fourth detection element; 340, Tail assembly; 350, Cable displacement sensor; 360, Nut locking assembly; 361, Base; 3611, Lug; 362, Inner seat; 363, Nut sleeve; 3631, First connecting block; 3632, Inner cavity; 3633, Gear; 364, Transmission mechanism; 3641, First drive wheel; 3641a, Second connecting block; 3642, Second drive wheel; 3643, First drive component; 365, Indexing pin; 370, Contact sensor Components; 371, Impact rod; 372, Proximity switch; 380, Anti-sway assembly; 381, Positioning mechanism; 3811, First positioning element; 3811a, Roller; 3812, Second positioning element; 382, ​​Second drive element; 383, Support frame; 384, Support rod; 3841, First sub-support rod; 3842, Second sub-support rod; 390, Lubrication assembly; 391, Rotary cylinder; 392, Lubrication pump; 393, Lubrication pipeline; 394, Lubrication nozzle; 400, Drive unit; 410, First drive mechanism; 420, Second drive mechanism; 430, Third drive mechanism. Detailed Implementation

[0051] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0052] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0053] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0057] This application provides a tensioning device and a tensioning machine including the tensioning device. The tensioning machine is used to align and engage with the member to be tensioned and pull the member to be tensioned backward to complete automatic tensioning, so as to ensure that the prepared member to be tensioned can withstand higher loads during use.

[0058] The structure of the tensioning machine and tensioning device in this application will be described below using the pipe pile mold (hereinafter referred to as the pipe mold) as an example. It is understood that in other embodiments, the tensioning machine and tensioning device of this application are not limited to tensioning only the pipe mold, but can also tension any other component to be tensioned, and this is not limited here.

[0059] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of the entire tube mold 10 is shown. Figure 1The pipe mold 10 shown includes a bottom mold 11, a top mold 12, a tensioning baffle 13, and a tensioning nut 14. The bottom mold 11 and the top mold 12 are fixedly connected to each other by clamping bolts. The tensioning baffle 13 is located at the end of the pipe mold 10 and has a tensioning screw 131. The tensioning nut 14 is sleeved on the tensioning screw 131 and threadedly connected to it. When assembling the pipe mold 10, the reinforcing bars are first placed inside the bottom mold and concrete is poured. Then, the top mold 12 is closed, and the bottom mold 11 and the top mold 12 are assembled together using clamping bolts. After assembly, the pipe mold 10 is sent to the tensioning station, where the tensioning machine 20 tensions the pipe mold 10. During the tensioning process, the bottom mold 11, the top mold 12, and the tensioning baffle 13 remain stationary, while the tensioning machine 20 pulls the tensioning screw 131 along... Figure 2 Tensioning is performed in the direction indicated by the middle arrow. At the same time, the tensioning machine 20 rotates the tensioning nut 14, causing the tensioning nut 14 to rotate relative to the tensioning screw 131 and abut against the tensioning baffle 13, so that the tensioning baffle 13 is fastened to the tube mold 10 and the tension force is locked on the tube mold 10.

[0060] See Figure 2 and Figure 3 , Figure 2 and Figure 3 A schematic diagram of the overall structure of a tensioning machine 20 according to an embodiment of this application is shown. The tensioning machine 20 provided in this embodiment includes a frame 200, a tensioning device 300, a drive unit 400, and a control unit (not shown in the figure). The tensioning device 300 is mounted on the frame 200 and is used to engage with the tensioning screw 131 of the tube mold 10 and perform tensioning. The drive unit 400 is partially driven to the frame 200 and partially driven to the tensioning device 300. It is used to drive the frame 200 to move relative to the tube mold 10 and to drive the tensioning device 300 to move independently relative to the frame 200, so that the tensioning device 300 can be coaxially aligned with the tensioning screw 131 of the tube mold 10 before tensioning the tube mold 10. The control unit is used to control the engagement of the tensioning device 300 with the tensioning screw 131 and pull the tensioning screw 131 backward in the tensioning direction indicated by the arrow to complete the tensioning.

[0061] In one embodiment, combined Figure 3 and Figure 4As shown, the frame 200 includes a first frame 210 and a second frame 220. The drive unit 400 includes a first drive mechanism 410, a second drive mechanism 420, and a third drive mechanism 430. The first drive mechanism 410 is mounted on the first frame 210, and the second drive mechanism 420 and the third drive mechanism 430 are mounted on the second frame 220. The second frame 220 is movably connected to the first frame 210 via the second drive mechanism 420. The tensioning device 300 is movably connected to the second frame 220. The driving mechanism 410 is used to drive the first frame 210, the second frame 220 and the tensioning device 300 to move left and right relative to the tube mold 10 along the first horizontal direction (X direction shown in the figure). The second driving mechanism 420 is used to drive the second frame 220 and the tensioning device 300 to move back and forth relative to the tube mold 10 along the second horizontal direction (Y direction shown in the figure) which is perpendicular to the first horizontal direction. The third driving mechanism 430 is used to drive the tensioning device 300 to move up and down relative to the tube mold 10 along the height direction (Z direction shown in the figure).

[0062] In one specific embodiment, the first frame 210 is slidably mounted on a guide rail 230 set on the ground. The first frame 210 is equipped with a rack, and the first drive mechanism 410 is a motor with an output end connected to a gear. As the output end rotates around its own central axis, the gear and rack mesh with each other, thereby enabling the first frame 210, the second frame 220, and the tensioning device 300 to move together in the X direction. Similarly, the second frame 220 is a frame with multiple columns 221. The structure includes at least one set of columns 221. In the embodiment shown in the figure, there are two sets of multiple columns 221, spaced apart along the Y direction. Each set of columns 221 includes two columns 221 spaced apart along the X direction. The second frame 220 is also equipped with a rack. The second drive mechanism 420 is the same as the first drive mechanism 410, with a gear at its output end. The gear and rack mesh together to drive the second frame 220 and the tensioning device 300 to move together along the Y direction. Further details are omitted. The second frame 220 is equipped with a fixed plate 222 and a lifting plate 223. The third drive mechanism 430 is mounted on the fixed plate 222 and is a combination of a motor and a reducer. The output end of the reducer is connected to the lifting plate 223. The tensioning device 300 is connected to the lifting plate 223 via a rope and is located between the two columns 221 of each set of columns 221 in the second frame 220. The output end of the third drive mechanism 430 can move up and down, thereby driving the lifting plate 223 to move up and down, and in turn driving the tensioning device 300 to move up and down along the Z direction.

[0063] Thus, through the above-mentioned configuration, the tensioning device 300 can move freely within a certain spatial range, thereby enabling the tensioning device 300 to be precisely aligned with the tensioning screw 131 before tensioning, so as to smoothly mesh with the tensioning screw 131.

[0064] See Figure 5 and Figure 6 In one embodiment, the tensioning device 300 includes a housing 310, a tensioning rod assembly 320, a detection assembly 330, and a tail component 340. The housing 310 has a tail end 302 and a head end 301 disposed opposite to each other in its own axial direction (i.e., the Y direction). The head end 301 is close to the tube mold 10, while the tail end 302 is away from the tube mold 10. The tensioning rod assembly 320 is movably coaxially inserted into the housing 310, and one end of the tensioning rod assembly 320 inserted into the housing 310 has a tensioning head 321 for engaging the tensioning screw 131. The tensioning rod assembly 320 can rotate relative to the housing 310 about its own central axis and move in the Y direction toward the tube mold 10 to engage the tensioning screw 131 under the drive of the tail component 340, or can move relative to the housing 310 away from the tube mold 10 to tension the tube mold 10. The detection component 330 is disposed on the housing 310 and located at the head end 301. The detection component 330 is used to measure the relative position between the tensioning head 321 and the tensioning screw 131, and sends a control signal to the control unit based on the measured relative position, so that the control unit can control the drive unit 400 to move the position of the tensioning device 300 based on the measurement signal, so that the tensioning head 321 is coaxially aligned with the tensioning screw 131, and after controlling the tensioning head 321 and the tensioning screw 131 to mesh with each other to a preset length, the tensioning rod assembly 320 is then controlled to retract in the Y direction to tension the tube mold 10.

[0065] In one specific implementation, see Figure 7The housing 310 includes a body 311 and a piston rod 312 coaxially arranged. The body 311 has cavities 3111 extending through opposite ends in the Y direction. The piston rod 312 is movably inserted into the cavity 3111 and closes the tail end 302. The piston rod 312 has piston holes 3121 extending through opposite ends in the Y direction. The body 311 includes a jack cylinder 3112 and a head component 3113 connected end to end. The end of the jack cylinder 3112 away from the head component 3113 is the tail end 302, and the end of the head component 3113 away from the jack cylinder 3112 is the head end 301. The piston rod 312 is movably inserted into the jack cylinder 3112 and closes the tail end 302. When the tension rod assembly 320 needs to engage the tension screw 131, the tension rod assembly 320 can rotate independently around its own central axis relative to the machine body 311 and piston rod 312 under the drive of the tail component 340 and move in the Y direction toward the tube mold 10; when the tension rod assembly 320 tensions the tube mold 10, the tension rod assembly 320 engages with the tension screw 131 and moves together with the piston rod 312 relative to the machine body 311 toward the direction away from the tube mold 10.

[0066] Preferably, the tensioning device 300 also includes a rope displacement sensor 350. One end of the rope displacement sensor 350 is disposed on the housing 310, and the other end is connected to the piston rod 312. The rope displacement sensor 350 is used to detect the displacement of the piston rod 312 relative to the housing 310, so that the user can know the tensioning displacement and thus more intuitively know whether the actual elongation of the pipe pile cage reinforcement meets the requirements.

[0067] Further, see Figure 8 In addition to the tensioning head 321, the tensioning rod assembly 320 also includes a tensioning rod 322. One end of the tensioning rod 322 is movably inserted into the piston rod 312, and the tensioning head 321 is connected to the end of the tensioning rod 322 inserted into the piston rod 312. Preferably, the tensioning rod assembly 320 also includes a tail nut 323, which is fixedly connected to the end of the piston rod 312 away from the head end 301. The outer circumferential surface of the tensioning rod 322 and the inner circumferential surface of the tail nut 323 are respectively provided with threads extending helically in the Y direction. The tensioning rod 322 passes through the tail nut 323 and the piston rod 312 in sequence and is threadedly connected to the tail nut 323. In this way, driven by the tail component 340, the tensioning rod 322 can move independently relative to the tail nut 323 and the piston rod 312 in the Y direction to approach the tensioning nut 14 while rotating around its own central axis under the transmission of the threaded connection.

[0068] However, in some cases, when the tensioning machine 20 malfunctions, the tensioning head 321 and the tensioning screw 131 may seize up. In this situation, if the tensioning head 321 is not easily detached from the tensioning rod 322, there is no way to handle the malfunction, causing the entire production line to stop. To solve this problem, as a further improvement, the tensioning rod assembly 320 also includes a sleeve 324 and an unlocking component 325, through which the tensioning head 321 is detachably connected to the tensioning rod 322. Specifically, the tension rod 322, sleeve 324, and tension head 321 are coaxially arranged, and the sleeve 324 is detachably fixed to one end of the tension rod 322 inserted into the housing 310 in the Y direction by a thread. The unlocking member 325 is movably disposed in the sleeve 324 and can be removed from the sleeve 324. When the unlocking member 325 is disposed in the sleeve 324, the tension head 321 is inserted into the sleeve 324 and abuts against the unlocking member 325, so that the tension head 321 and the sleeve 324 are locked together. When the unlocking member 325 is removed from the sleeve 324, the tension head 321 can separate from the sleeve 324 after rotating around its own central axis at an angle relative to the sleeve 324 and the tension rod 322.

[0069] Specifically, please refer to Figure 8 The sleeve 324 has a receiving cavity 3241 inside, and the sleeve 324 has an insertion hole 3242 with a diameter smaller than the receiving cavity 3241 and connected to the receiving cavity 3241 on one side in the Y direction. The inner circumferential surface of the insertion hole 3242 has a plurality of grooves 3243 that are spaced apart along the circumferential direction of the insertion hole 3242 and connected to the receiving cavity 3241. The outer circumferential surface of the tensioning head 321 has a plurality of protrusions that are spaced apart along the circumferential direction of the tensioning head 321. 3211, and unlocking member 325 also have a plurality of them. The plurality of protrusions 3211 and the plurality of unlocking members 325 are adjacent to each other and alternately arranged along the circumferential direction of the sleeve 324. At least a portion of each protrusion 3211 and each unlocking member 325 is provided in the receiving cavity 3241, and each protrusion 3211 abuts against the side wall of the adjacent unlocking member 325 and the receiving cavity 3241. All unlocking members 325 can be removed from the sleeve 324 through the groove 3243.

[0070] More specifically, each unlocking element 325 includes a bolt 3251 and a pad 3252. The pad 3252 is aligned with a corresponding groove 3243. The bolt 3251 is insertably inserted through the outer peripheral surface of the sleeve 324 into the sleeve wall and abuts against the tensioning head 321 to prevent the pad 3252 from disengaging from the receiving cavity 3241 via the groove 3243. Preferably, the outer peripheral surface of the sleeve 324 has a through hole 3244 communicating with the receiving cavity 3241. The through hole 3244 is used for a worker's hand or tool to be inserted so that the pad 3252 can be pulled out of the receiving cavity 3241. Preferably, in the embodiment shown in the figure, the through hole 3244 is shaped like an oblong hole, so that there is enough room for a tool or finger to move after being inserted into the through hole 3244 to pull out the pad 3252.

[0071] Thus, with the above setup, when the tensioning machine 20 malfunctions, the bolt 3251 can be pulled out first, so that the displacement of the pad 3252 in the Y direction is unrestricted. Then, a finger or tool can be inserted into the through hole 3244 and the pad 3252 can be pulled out along the Y direction. Finally, after the tensioning head 321 is rotated at an angle relative to the sleeve 324, the protrusion 3211 can be aligned with the corresponding groove 3243 and can exit the receiving cavity 3241 through the groove 3243, thereby allowing the tensioning head 321 to disengage from the sleeve 324. This allows the tensioning screw 131 to disengage from the tensioning machine 20, making it easier for workers to handle the malfunction.

[0072] It is understood that the structure of the unlocking component 325 is not limited to the structure of the bolt 3251 and the pad 3252 mentioned above. For example, only the pad 3252 can be provided without the bolt 3251, as long as the pad 3252 will not automatically disengage from the receiving cavity 3241 through the groove 3243 in the locked state, but must be manually pulled out to disengage from the receiving cavity 3241.

[0073] As a further improvement, the end of the tensioning head 321 is provided with a threaded hole 3212 for engaging the tensioning screw 131, and the outer circumferential surface of the tensioning head 321 is provided with a mud-removing groove 3213 communicating with the threaded hole 3212. The mud-removing groove 3213 is used to scrape off the mud on the tensioning screw 131 during the engagement of the tensioning head 321 and the tensioning screw 131, and to discharge the mud from the mud-removing groove 3213. This ensures that there are no impurities remaining on the threads of the threaded hole 3212, and avoids the tensioning screw 131 and the tensioning head 321 being blocked by mud and unable to automatically engage into the threaded hole 3212 of the tensioning head 321.

[0074] For better information, please continue reading. Figure 6 and Figure 7The tension rod assembly 320 also includes a mounting base 326, and the tail component 340 is mounted on the mounting base 326. The mounting base 326 is provided with a guide shaft 327 extending in the Y direction, and the housing 310 is provided with a first linear bearing 313. The guide shaft 327 can move relative to the housing 310 under the guidance of the first linear bearing 313, so that the tension rod assembly 320 can move more smoothly when it moves alone relative to the housing 310.

[0075] Furthermore, such as Figure 9 As shown, in one embodiment, the detection component 330 includes a bracket 331 and a first detection element 332, a second detection element 333, a third detection element 334, and a fourth detection element 335 disposed on the bracket 331. The bracket 331 is connected to the housing 310, specifically to the head component 3113 of the housing 310. The first detection element 332 is disposed directly above the bracket 331 at the head end 301 along the Z direction shown in the figure. The second detection element 333 is disposed on both sides of the head end 301 along the radial direction (i.e., the X direction) of the housing 310. The fourth detection element 335 is spaced apart from the second detection element 333 in the Y direction and disposed on both sides of the bracket 331 along the X direction.

[0076] The first detection element 332 is used to measure the distance between the tensioning screw 131 and the first detection element 332; the second detection element 333 is used to measure the diameter of the tensioning screw 131 and the starting position of the thread on the tensioning screw 131; the third detection element 334 is used to measure the distance between the head end 301 and the tensioning baffle 13 of the member to be tensioned; and the fourth detection element 335 is used to measure the position of the tensioning head 321 inside the housing 310 and the distance by which the tensioning screw 131 extends into the housing 310.

[0077] In one embodiment, the first detection element 332 and the third detection element 334 are laser rangefinders, and the second detection element 333 and the fourth detection element 335 are through-beam measurement light curtains. The second detection element 333 and the fourth detection element 335 each have a transmitting part and a receiving part, and the measurement result is obtained by emitting a light beam from the transmitting part to the receiving part.

[0078] Specifically, the bracket 331 includes a first arm 3311, two second arms 3312, and two light curtain frames 3313. The first arm 3311 is connected to the upper side of the head end 301 of the housing 310 and extends outward from the head end 301 along the Z and Y directions relative to the cavity 3111 of the housing 310. The two second arms 3312 are respectively connected to the two sides of the head end 301 of the housing 310 along the X direction. Each second arm 3312 extends outward from the head end 301 along the X and Y directions relative to the cavity 3111. The two light curtain frames 3313 are respectively connected to the two sides of the housing 310 along the radial direction. Each light curtain frame 3313 is arranged parallel to the Y direction, and one end of each light curtain frame 3313 is connected to a corresponding second arm 3312, and the other end is connected to the housing 310.

[0079] The first detection element 332 is disposed on the first support arm 3311, the transmitting part and the receiving part of the second detection element 333 are respectively disposed on a corresponding second support arm 3312, the third detection element 334 is disposed on one of the second support arms 3312, and the transmitting part and the receiving part of the fourth detection element 335 are respectively disposed on a corresponding light curtain frame 3313.

[0080] Thus, with the above settings, the detection component 330 can measure the required measurement results, convert the measurement results into measurement signals and send them to the control unit. The control unit controls the drive unit 400 to drive the tensioning head 321 of the tensioning device 300 to be aligned with the tensioning screw 131, and starts the tail component 340 of the tensioning device 300 so that the tensioning head 321 can engage with the tensioning screw 131 to a preset length and then stop.

[0081] As a further improvement, such as Figure 5 and Figure 10 As shown, the tensioning device 300 also includes a nut locking assembly 360 located at the head end 301. The nut locking assembly 360 has a nut sleeve 363 coaxially arranged with the housing 310. The nut sleeve 363 is used to be sleeved on the tensioning nut 14 of the tube mold 10 and can be rotated controllably around its own central axis to automatically lock the tensioning nut 14 without manual locking of the tensioning nut 14.

[0082] Specifically, see Figure 10 and Figure 11The nut locking assembly 360 includes a base 361, an inner seat 362, a nut sleeve 363, and a transmission mechanism 364. The inner seat 362 is coaxially arranged with the base 361 and rotatably connected to the base 361 via bearings. The nut sleeve 363 is coaxially engaged with one side of the base 361 along the Y direction (i.e., the axial direction of the base 361 itself). The nut sleeve 363 has an inner cavity 3632 for engaging the tension nut 14. The transmission mechanism 364 is drively connected to one side of the inner seat 362 along the Y direction (i.e., the axial direction of the inner seat 362 itself). The transmission mechanism 364 can drive the inner seat 362 to rotate relative to the base 361 around its own central axis and simultaneously drive the nut sleeve 363 to rotate around its own central axis.

[0083] In one embodiment, the transmission mechanism 364 includes a first drive wheel 3641, a second drive wheel 3642, and a first drive member 3643. The first drive wheel 3641 is fixedly connected to the inner seat 362, the second drive wheel 3642 is tractively connected to the first drive wheel 3641, and the first drive member 3643 is a drive source such as a motor, tractively connected to the second drive wheel 3642. The first drive member 3643 is configured to drive the second drive wheel 3642 to rotate around its own central axis, so that the first drive wheel 3641 can synchronously drive the inner seat 362 and the nut sleeve 363 to rotate around their own central axis.

[0084] It is understood that the transmission method between the first drive wheel 3641 and the second drive wheel 3642 can be belt drive, chain drive, or gear drive. It is also understood that the transmission mechanism 364 can consist only of the first drive wheel 3641 and the first drive member 3643, with the first drive member 3643 directly driving the first drive wheel 3641 to rotate around its own central axis; this is not limited here.

[0085] Better, such as Figure 12 As shown, to facilitate disassembly of the nut sleeve 363, the nut sleeve 363 is detachably fixedly connected to the first drive wheel 3641. Specifically, the nut sleeve 363 has a plurality of first connecting blocks 3631 arranged at intervals around its circumference on the side near the transmission assembly; correspondingly, the first drive wheel 3641 has a plurality of second connecting blocks 3641a arranged at intervals around the central axis of the base 361, and each second connecting block 3641a is connected to a first connecting block 3631. More specifically, the first connecting blocks 3631 and the second connecting blocks 3641a are connected to each other by indexing pins 365. The first connecting block 3631 has a first connecting hole penetrating through its opposite sides, and the second connecting block 3641a has a second connecting hole penetrating through its opposite sides. The first connecting holes are coaxially aligned with the second connecting holes, and the indexing pin 365 passes through one first connecting hole and one corresponding second connecting hole.

[0086] More preferably, the nut sleeve 363 and the inner seat 362 are detachably snapped together. The inner circumferential surface of the inner seat 362 has multiple slots (not shown in the figure) spaced apart along its own circumferential direction. Correspondingly, the outer circumferential surface of the nut sleeve 363 has multiple teeth 3633 spaced apart along its own circumferential direction. Each tooth 3633 is snapped into a corresponding slot. Furthermore, the inner cavity 3632 extends through the opposite sides of the nut sleeve 363 in the Y direction (i.e., its own axial direction) to prevent the tension nut 14 from moving arbitrarily in the Y direction. The opening of the inner cavity 3632 on the side closer to the transmission mechanism 364 is smaller than the opening on the opposite side, and the diameter of this opening is less than or equal to the outer diameter of the tension nut 14.

[0087] Thus, with the above setup, when the tensioning machine 20 malfunctions and needs repair, after disassembling the tensioning head 321 and sleeve 324 of the aforementioned tensioning head 321 assembly, the nut sleeve 363 can be disassembled along the Y direction simply by pulling out the indexing pin 365. This allows the tensioning head 321 assembly and the nut sleeve 363 to be disassembled together along the Y direction. Then, the tensioning head 321 can be manually knocked off the tensioning screw 131, which can quickly resolve the malfunction without affecting the production line.

[0088] Furthermore, please continue reading Figure 10 The base 361 is provided with lugs 3611 at both ends along the X direction, and the housing 310 is provided with linear slide rails 314 on both sides along the X direction. Each lug 3611 is connected to the linear slide rail 314 through a linear bearing, and the linear slide rail 314 is also provided with a spring 316, so that the nut locking assembly 360 can move along the Y direction according to the actual position of the tension nut 14 and can be buffered, thereby adapting to the actual position of the tension nut 14.

[0089] Please continue reading Figure 9 The tensioning device 300 is also provided with a contact sensing component 370, which includes an impact rod 371 and a proximity switch 372, to determine the position of the tensioning device 300 in the Y direction when it is aligned with the tube mold 10. That is, when the tensioning device 300 approaches the tube mold 10 in the Y direction, as long as the impact rod 371 hits the tensioning baffle 13 of the tube mold 10, the proximity switch 372 will be triggered, thereby stopping the tensioning device 300 from moving towards the tube mold 10.

[0090] See Figure 13To prevent the tensioning device 300 and the tensioning screw 131 from swinging along the X and Y directions during their alignment, the tensioning device 300 also includes an anti-sway assembly 380. In the embodiment shown in the figure, there are two anti-sway assemblies 380, which are disposed on opposite sides of the housing 310 along the X direction. Each anti-sway assembly 380 has two positioning mechanisms 381. Each positioning mechanism 381 can be controllably moved along the X direction away from the housing 310 and abuts against a column 221 of the second frame 220 in the tensioning machine 20 (i.e., the column 221 located on one side of the housing 310 in the X direction).

[0091] Specifically, see Figure 14 and Figure 15 Each positioning mechanism 381 includes a first positioning member 3811 and a second positioning member 3812 arranged perpendicularly to each other. The first positioning member 3811 is used to abut against the side of the column 221 in the X direction to limit the displacement of the tensioning device 300 relative to the frame 200 in the X direction. The second positioning member 3812 is used to abut against the side of the column 221 in the Y direction to limit the displacement of the tensioning device 300 relative to the frame 200 in the Y direction.

[0092] More specifically, each anti-sway component 380 further includes a second drive element 382 and a support frame 383. The second drive element 382 can be a drive source such as a cylinder, and has a fixed end and a movable end. The support frame 383 is connected to the movable end. A positioning mechanism 381 is mounted on the bracket 331. The movable end can move relative to the fixed end to drive the support frame 383 and the positioning mechanism 381 to reciprocate in the X direction. More specifically, each positioning mechanism 381 also includes a support rod 384 connected to the support frame 383. The support rod 384 includes a first sub-support rod 3841 and a second sub-support rod 3842 arranged perpendicularly to each other. A first positioning element 3811 is connected to the first sub-support rod 3841, and a second positioning element 3812 is connected to the second sub-support rod 3842.

[0093] Preferably, each positioning mechanism 381 is rotatably connected to the support frame 383, and under the action of an external force, the positioning mechanism 381 can rotate relative to the support frame 383 about an axis extending along the Z direction (i.e., along...). Figure 14The positioning mechanism 381 rotates in the direction of the arc with the arrow in the middle to be in a clamping or releasing state. When in the clamping state, the positioning mechanism 381 abuts against the side of the column 221; when in the releasing state, the positioning mechanism 381 disengages from the column 221. More preferably, the two positioning mechanisms 381 are interconnected by an elastic element (not shown in the figure) such as a torsion spring or tension spring, which is configured to provide an elastic force to switch the positioning mechanism 381 from the clamping state to the releasing state; when each positioning mechanism 381 moves toward the column 221 and abuts against the column 221, the positioning mechanism 381 is in the clamping state, and the elastic element undergoes a recoverable deformation; when each positioning mechanism 381 moves away from the column 221 and disengages from the column 221, the positioning mechanism 381 switches to the releasing state under the action of the elastic force.

[0094] Thus, when the tensioning device 300 and the tensioning screw 131 are aligned, the second driving member 382 pushes out the positioning mechanism 381 and holds it against the column 221 of the second frame 220. The tensioning device 300 can only move together with the second frame 220 in the X direction or move together with the second frame 220 in the Y direction, or move relative to the second frame 220 in the Z direction, but cannot move alone in the X or Y direction. This prevents the tensioning device 300 from swinging when aligned with the tensioning screw 131, thus affecting the alignment accuracy. When tensioning is performed after alignment, the second driving component 382 drives the positioning structure to retract, causing the positioning mechanism 381 to disengage from the column 221. In this way, during the tensioning process, the six free ends of the tensioning device 300 are unrestricted, and can be finely adjusted and followed along the axial direction of the tensioning screw 131. This ensures that the tensioning rod assembly 320 and tensioning rod 322 of the tensioning device 300 are not interfered with by other external bending moment forces during the tensioning process, thereby improving the service life of the entire tensioning machine 20.

[0095] It should be noted that the housing 310 may have one or more anti-sway components 380 on each side in the X direction. The number of positioning mechanisms 381 of each anti-sway component 380 is unlimited, and may be one or more, depending on the number of columns 221 on one side of the housing 310 in the X direction. Multiple positioning mechanisms 381 are spaced apart along the Y direction, and each positioning mechanism 381 is used to abut against a corresponding column 221.

[0096] As a further improvement, to enable the positioning mechanism 381 to move more smoothly relative to the second frame 220 along the Z direction, the first positioning member 3811 and / or the second positioning member 3812 each include at least one roller 3811a, which can roll along the side of the column 221 in the Z direction of the tensioning device 300. Furthermore, each positioning mechanism 381 also includes a support rod 384 connected to the support frame 383. The support rod 384 includes a first sub-support rod 3841 and a second sub-support rod 3842 arranged perpendicularly to each other. The first positioning member 3811 is connected to the first sub-support rod 3841, and the second positioning member 3812 is connected to the second sub-support rod 3842. Preferably, the first positioning member 3811 and / or the second positioning member 3812 may each have multiple rollers 3811a. For example, as shown in the embodiment in the figure, the first positioning member 3811 includes multiple rollers 3811a, which are arranged coaxially in sequence along the Y direction. Of course, the second positioning member 3812 may also include multiple rollers 3811a. When the second positioning member 3812 includes multiple rollers 3811a, the multiple rollers 3811a are arranged coaxially in sequence along the X direction.

[0097] In addition, to improve the service life of the tensioning head 321 and the tensioning screw 131, the sleeve 324 of the tensioning rod assembly 320 and the tensioning head 321 are respectively provided with lubrication holes communicating with the cavity 3111, such as... Figure 16 As shown, the tensioning device 300 also includes a lubrication assembly 390 mounted on the housing 310. The lubrication assembly 390 includes a rotary cylinder 391, a lubrication pump 392, and a lubrication pipeline 393. The lubrication pump 392 is mounted on the frame 200. The lubrication pipeline 393 is connected to the rotary cylinder 391, with one end of the lubrication pipeline 393 connected to the lubrication pump 392. The opposite end of the lubrication pipeline 393 is provided with a lubrication nozzle 394. The rotary cylinder 391 can drive the lubrication pipeline 393. 3. Rotate about an axis relative to the housing 310 so that the lubrication nozzle 394 is sequentially inserted into the lubrication holes of the sleeve 324 and the tensioning head 321, so that the lubrication pump 392 can spray lubricating oil onto the internal thread of the tensioning head 321 through the lubrication nozzle 394 to lubricate the thread of the tensioning head 321. Thus, during tensioning, the threads of the tensioning head 321 and the tensioning screw 131 can be mutually lubricated, thereby further improving the service life of the tensioning head 321 and the tensioning screw 131.

[0098] The following, combined with Figures 1 to 10 The automatic positioning and tensioning process of the tensioning machine 20 provided in this application will be further explained.

[0099] First, in the automatic positioning process, in step S1, the detection component 330 is used to obtain the first measurement value and the second measurement value. Based on the first measurement value and the second measurement value, the control unit controls the tensioning device 300 to move relative to the tube mold 10, so that the tensioning head 321 of the tensioning device 300 is coaxially aligned with the tensioning screw 131 of the tube mold 10.

[0100] Specifically, this step includes the following steps:

[0101] S11. Obtain a first measurement value using the second detection element 333. The first measurement value includes the end position of the tensioning screw 131, the diameter of the tensioning screw 131, the thread start position of the tensioning screw 131, and the length of the tensioning screw 131 at the wrench position.

[0102] S12. Based on the measured diameter of the tensioning screw 131, the control unit controls the first drive mechanism 410 of the drive unit 400 to drive the first frame 210 to move the tensioning device 300 along the X direction. During the movement, the first detection element 332 acquires multiple second measurement values. The second measurement value is the distance from the first detection element 332 to the outer circumference of the tensioning screw 131. This is because, since the tensioning screw 131 is cylindrical, its surface is arc-shaped. Therefore, as the tensioning device 300 moves along the X direction, the distance from the first detection element 332 to the outer surface of the tensioning screw 131 will change, showing a trend of gradually decreasing and then gradually increasing.

[0103] S13. Extract the minimum value from the multiple second measurement values. Since the distance between the first detection element 332 and the outer surface of the tensioning screw 131 will gradually decrease and then gradually increase, there must be a minimum value of this distance. When this distance is the minimum, the coordinates of the central axis of the surface tensioning screw 131 and the central axis of the tensioning device 300 in the X direction are the same. At this time, the tensioning screw 131 and the tensioning head 321 are aligned with each other in the X direction.

[0104] S14. Based on the minimum value of the extracted second measurement, the first drive mechanism 410 drives the tensioning device 300 to adjust its position along the X direction, so that the tensioning device 300 is aligned with the tensioning screw 131 in the X direction.

[0105] S15. The control unit compares the minimum value of the extracted second measured value with the theoretical value.

[0106] S16. Based on the comparison results, the control unit controls the third drive mechanism 430 to adjust the position of the tensioning device 300 along the Z direction until the minimum value of the second measurement is equal to the theoretical value. At this time, the coordinate of the central axis of the tensioning device 300 in the height direction is the same as the coordinate of the central axis of the tensioning screw 131 in the height direction, that is, the tensioning head 321 and the tensioning screw 131 are also aligned with each other in the height direction.

[0107] In the second step S2, the detection component 330 is used to obtain a third measurement value. Based on the third measurement value, the control unit controls the tensioning device 300 to move along the Y direction (i.e., along its own axis) to approach the tube mold 10 and lock the tensioning nut 14 of the tube mold 10.

[0108] Specifically, this step includes the following steps:

[0109] S21. A third measurement value is obtained using the third detection element 334. The third measurement value is the distance between the head end 301 and the tensioning baffle 13 of the tube mold 10.

[0110] S22. Based on the third measurement value and the first measurement value obtained in step S11 above, the control unit adjusts the speed at which the tensioning device 300 moves along the Y direction.

[0111] S23. Move the tensioning device 300 along the Y direction until the impact rod 371 installed at the head end 301 touches the tensioning baffle 13, indicating that the tensioning device 300 is adjusted in the Y direction. At this time, the nut sleeve 363 of the nut locking assembly 360 is sleeved on the tensioning nut 14 of the tube mold 10.

[0112] S24. Nut sleeve 363 rotates around its own central axis until the motor detects that the torque of nut sleeve 363 has reached the set value and then stops rotating.

[0113] In the third step S3, the detection component 330 is used to obtain a fourth measurement value. Based on the fourth measurement value and the first measurement value obtained in the aforementioned step S1, the control unit controls the tensioning head 321 to move along the Y direction and engage the tensioning screw 131 to the preset length.

[0114] Specifically, this step includes the following steps:

[0115] S31. A fourth measurement value is obtained using the fourth detection element 335. The fourth measurement value includes the position of the tensioning head 321 inside the housing 310 and the length of the tensioning screw 131 extending into the housing 310.

[0116] S32. Based on the fourth measurement value and the first measurement value obtained by the second detection element 333 in the aforementioned step S1, the control unit controls the tensioning head 321 to move along the Y direction to engage the tensioning screw 131, and at the same time controls the speed at which the tensioning head 321 engages the tensioning screw 131.

[0117] S33. Use the fourth detection element 335 to obtain the fourth measurement value in real time until the engagement length between the tensioning head 321 and the tensioning screw 131 reaches the preset length.

[0118] At this point, the tensioning device 300 engages with the tensioning screw 131 of the tube mold 10. Then, the tensioning rod assembly 320 and the piston rod 312 move backward relative to the machine body 311 away from the tube mold 10 to tension the tube mold 10. During the tensioning process, the tensioning nut 14 changes from a locked state to a loose state. The nut sleeve 363 of the nut locking assembly 360 restarts to rotate around its own central axis to lock the tensioning nut 14 until the tensioning ends. At this point, the motor detects that the torque of the nut sleeve 363 has reached the set value, and the tensioning nut 14 is locked again, thus ending the entire automatic positioning and tensioning process.

[0119] Therefore, the tensioning machine 20 provided in this application has automatic positioning, automatic tensioning, anti-swaying, and automatic lubrication functions. Compared with manual alignment and manual tensioning, the entire process requires no manual operation or intervention, which not only improves production efficiency and reduces the labor intensity of workers and improves the overall working environment, but also allows the tensioning station in the production line to be set as an unmanned operation station, effectively avoiding the risk of personal injury. Furthermore, by designing the tensioning head 321 assembly and the nut locking assembly 360 into a structure that is easy to disassemble, it is also possible to easily remove the tube mold 10 from the tensioning machine 20 in the event of a malfunction, thus quickly resolving the fault and not affecting the production line.

[0120] Finally, it should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A tensioning device, characterized in that, include: The casing has a tail end and a head end that are positioned opposite each other along its own axial direction; The tension rod assembly is movably and coaxially inserted into the housing at one end along the axial direction. The end of the tension rod assembly inserted into the housing has a tensioning head for engaging the tensioning screw of the member to be tensioned. The tension rod assembly can rotate relative to the housing about its own central axis and move along the axial direction toward the member to be tensioned to engage the tensioning screw, or it can move relative to the housing along the axial direction away from the member to be tensioned to tension the member. A detection component is provided at the head end. The detection component is used to measure the relative position between the tensioning head and the tensioning screw, and to send a measurement signal to an external control unit based on the measured relative position, so that the control unit can control the tensioning head to be coaxially aligned with the tensioning screw based on the measurement signal, and control the tensioning head and the tensioning screw to mesh with each other to a preset length. At least two anti-sway components, at least two of the anti-sway components are radially disposed on opposite sides of the housing, each of the anti-sway components having at least one positioning mechanism, each of the positioning mechanisms being controllably movable radially away from the housing and abutting against a column located on the radially upward side of the housing; Each of the positioning mechanisms includes a first positioning member and a second positioning member arranged perpendicularly to each other. The first positioning member is used to abut against the side of the column in the radial direction to limit the displacement of the tensioning device relative to the column in the radial direction. The second positioning member is used to abut against the side of the column in the axial direction to limit the displacement of the tensioning device relative to the column in the axial direction.

2. The tensioning device according to claim 1, characterized in that, The housing includes a body and a piston rod arranged coaxially. The body has cavities extending through its axial direction to opposite ends. The piston rod is movably inserted into the cavity and closes the tail end. The piston rod has piston holes extending through its axial direction to opposite ends. When the tension rod assembly engages the tension screw, the tension rod assembly rotates independently about its own central axis relative to the machine body and the piston rod and moves along the axial direction toward the member to be tensioned; When the tensioning rod assembly tensions the member to be tensioned, the tensioning rod assembly engages with the tensioning screw and moves together with the piston rod relative to the machine body along the axial direction away from the member to be tensioned.

3. The tensioning device according to claim 1 or 2, characterized in that, The tension rod assembly further includes a tension rod, a sleeve, and an unlocking component. The sleeve is connected to one end of the tension rod in the axial direction, and the unlocking component is movably disposed inside the sleeve and can be removed from the sleeve. When the unlocking element is located inside the sleeve, the tensioning head is inserted into the sleeve and abuts against the unlocking element, so that the tensioning head and the sleeve are locked together. When the unlocking component is removed from the sleeve, the tensioning head can rotate around its own central axis relative to the sleeve and the tensioning rod by an angle and then separate from the sleeve.

4. The tensioning device according to claim 3, characterized in that, The sleeve has a receiving cavity, and the sleeve has an insertion hole with a diameter smaller than the receiving cavity and communicating with the receiving cavity on one side of the axial direction. The inner circumferential surface of the insertion hole has a plurality of grooves that are spaced apart along the circumferential direction of the insertion hole and communicating with the receiving cavity. The outer circumferential surface of the tensioning head has a plurality of protrusions that are spaced apart along the circumferential direction of the tensioning head. The unlocking member has a plurality of corresponding members. The plurality of protrusions and the plurality of unlocking members are adjacent to and alternately arranged along the circumferential direction of the sleeve. At least a portion of each protrusion and each unlocking member is disposed in the receiving cavity, and each protrusion abuts against the side wall of the adjacent unlocking member and the receiving cavity. All of the unlocking components can be removed from the sleeve through the groove, so that after the tensioning head rotates at an angle relative to the sleeve, the protrusion can be positioned in the corresponding groove and can exit the receiving cavity through the groove, thereby disengaging the tensioning head from the sleeve.

5. The tensioning device according to claim 4, characterized in that, Each of the unlocking elements includes a bolt and a pad, the pad being aligned with a corresponding groove, the bolt being insertably inserted through the outer circumferential surface of the sleeve into the sleeve wall and abutting against the tensioning head to prevent the pad from disengaging from the receiving cavity via the groove.

6. The tensioning device according to claim 1 or 2, characterized in that, The detection assembly includes a bracket and a first detection element, a second detection element, a third detection element, and a fourth detection element disposed on the bracket; the bracket is connected to the housing, the first detection element is disposed on the bracket directly above the head end, the second detection element is disposed on both sides of the head end along the radial direction of the housing, and the fourth detection element is spaced apart from the second detection element in the axial direction and disposed on both sides of the bracket along the radial direction of the housing; The first detection element is used to measure the distance between the tensioning screw and the first detection element; the second detection element is used to detect the diameter of the tensioning screw and the starting position of the thread on the tensioning screw; the third detection element is used to measure the distance between the head end and the tensioning baffle of the member to be tensioned; and the fourth detection element is used to measure the position of the tensioning head inside the housing and the distance the tensioning screw extends into the housing.

7. The tensioning device according to claim 1 or 2, characterized in that, The tensioning device further includes a nut locking assembly located at the head end. The nut locking assembly has a nut sleeve coaxially arranged with the housing. The nut sleeve is used to be sleeved on the tensioning nut of the member to be tensioned and can be controllably rotated around its own central axis to lock the tensioning nut.

8. The tensioning device according to claim 7, characterized in that, The nut locking assembly also includes: The base is fixedly connected to the housing; Inner seat; rotatably connected to the machine base via bearings, the nut sleeve is coaxially disposed on one side of the inner seat in the axial direction and is detachably snapped into the inner seat; The transmission mechanism is coaxially connected to the side of the inner seat away from the nut sleeve in the axial direction and is detachably connected to the nut sleeve. The transmission mechanism can controllably drive the inner seat to rotate relative to the machine base about its own central axis and drive the nut sleeve to rotate synchronously about its own central axis.

9. The tensioning device according to claim 8, characterized in that, The tensioning device also includes a lubrication assembly on the housing. The lubrication assembly includes a rotary cylinder, a lubrication pump, and a lubrication pipeline. The lubrication pipeline is connected to the rotary cylinder, and one end of the lubrication pipeline is connected to the lubrication pump. The opposite end of the lubrication pipeline is provided with a lubrication nozzle. The rotary cylinder can drive the lubrication pipeline to rotate relative to the housing around an axis so that the lubrication nozzle can be inserted into the tensioning head.

10. A tensioning machine, characterized in that, include: The first frame is equipped with the first drive mechanism; The second frame is provided with a second drive mechanism and a third drive mechanism, and the second frame is movably connected to the first frame through the second drive mechanism; The tensioning device as described in any one of claims 1-9 is mounted on the second frame and is driveably connected to the third driving mechanism; the first driving mechanism is used to drive the first frame, the second frame, and the tensioning device to move left and right relative to the member to be tensioned along a first horizontal direction; the second driving mechanism is used to drive the second frame and the tensioning device to move back and forth relative to the member to be tensioned along a second horizontal direction perpendicular to the first horizontal direction; and the third driving mechanism is used to drive the tensioning device to move up and down relative to the member to be tensioned along a height direction. The control unit is communicatively connected to the detection component of the tensioning device. The control unit is used to control the first drive mechanism, the second drive mechanism and the third drive mechanism to drive the tensioning device to move according to the measurement signal emitted by the detection component so that the tensioning head is aligned with the member to be tensioned, and to control the tensioning device to automatically tension the member to be tensioned.

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