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CN-116852522-B - Tensioning device and tensioning machine

CN116852522BCN 116852522 BCN116852522 BCN 116852522BCN-116852522-B

Abstract

The application relates to a tensioning device and a tensioning machine. The stretching machine comprises a stretching device and a control unit, the stretching device comprises a shell, a stretching rod assembly and a detection assembly, the stretching rod assembly is provided with a stretching head, the stretching rod assembly can rotate around a central axis of the stretching rod assembly relative to the shell and can move forwards along the axial direction of the stretching rod assembly to engage with a stretching screw rod, or can move backwards along the axial direction relative to the shell to stretch a piece to be stretched, the detection assembly is arranged on the shell and is used for measuring the relative position between the stretching head and the stretching screw rod and sending a measuring signal to the control unit according to a measuring result, so that the control unit can control the stretching head to be coaxially positioned on the stretching screw rod based on the measuring signal and control the stretching head and the stretching screw rod to be mutually engaged with each other to a preset length, thereby realizing full-automatic alignment and full-automatic stretching, not only improving production efficiency, reducing labor intensity of workers, but also setting a stretching station as an unmanned operation station, and effectively avoiding personal injury risk.

Inventors

  • MA JINYUAN
  • LIN JIANHUANG
  • FANG FAN

Assignees

  • 汤始建华建材（上海）有限公司

Dates

Publication Date
20260505
Application Date
20230731

Claims (10)

  1. 1. A tensioning device, comprising: The machine shell is provided with a machine tail end and a machine head end which are oppositely arranged in the axial direction of the machine shell; The tension rod assembly can rotate around the central axis of the tension rod assembly relative to the shell and move along the axial direction towards the direction close to the piece to be tensioned so as to engage the tension rod, or can move along the axial direction towards the direction far away from the piece to be tensioned relative to the shell so as to tension the piece to be tensioned; The detection assembly is used for measuring the relative position between the tensioning head and the tensioning screw rod, and sending a measurement signal to an external control unit according to the measured relative position, so that the control unit can control the tensioning head to be coaxially opposite to the tensioning screw rod based on the measurement signal and control the tensioning head and the tensioning screw rod to be mutually meshed to a preset length; At least two anti-swing assemblies, at least two of which are arranged on two opposite sides of the shell along the radial direction of the shell, wherein each anti-swing assembly is respectively provided with at least one positioning mechanism, and each positioning mechanism can controllably move along the radial direction in a direction away from the shell and is propped against a stand column positioned on one side of the shell in the radial direction; Each positioning mechanism comprises a first positioning piece and a second positioning piece which are arranged vertically to each other, wherein the first positioning piece is used for propping against the side surface of the upright post in the radial direction so as to limit the displacement of the tensioning device relative to the upright post in the radial direction, and the second positioning piece is used for propping against the side surface of the upright post in the axial direction so as to limit the displacement of the tensioning device relative to the upright post in the axial direction.
  2. 2. A tensioning device according to claim 1, wherein the housing comprises a body and a piston rod coaxially arranged, the body having a cavity extending through opposite ends of the body in an axial direction, the piston rod being movably inserted into the cavity and closing the tail end, the piston rod having piston holes extending through opposite ends of the piston rod in the axial direction; When the tension rod assembly is meshed with the tension screw rod, the tension rod assembly rotates around the central axis of the tension rod assembly and moves along the axial direction towards the direction approaching the piece to be tensioned relative to the machine body and the piston rod; When the tension rod assembly stretches the piece to be stretched, the tension rod assembly is meshed with the tension screw rod and moves along the axial direction along with the piston rod along with the machine body in a direction away from the piece to be stretched.
  3. 3. A tensioning device according to claim 1 or claim 2, wherein the tension rod assembly further comprises a tension rod, a sleeve connected to one end of the tension rod in the axial direction, and an unlocking member movably provided in the sleeve and removable from the sleeve; when the unlocking piece is arranged in the sleeve, the tensioning head is inserted into the sleeve and is propped against the unlocking piece, so that the tensioning head and the sleeve are mutually locked; When the unlocking piece is taken out of the sleeve, the tension head can rotate around the central axis of the tension head by an angle relative to the sleeve and the tension rod and then is separated from the sleeve.
  4. 4. A tensioning device according to claim 3, wherein a containing cavity is formed in the sleeve, a jack which is smaller than the containing cavity in diameter and is communicated with the containing cavity is formed in one side of the sleeve in the axial direction, a plurality of grooves which are arranged at intervals along the circumferential direction of the jack and are communicated with the containing cavity are formed in the inner circumferential surface of the jack, a plurality of protruding blocks which are arranged at intervals along the circumferential direction of the tensioning head are formed in the outer circumferential surface of the tensioning head, a plurality of unlocking pieces are correspondingly arranged, a plurality of protruding blocks and a plurality of unlocking pieces are adjacently and alternately arranged along the circumferential direction of the sleeve, at least part of each protruding block and each unlocking piece are arranged in the containing cavity, and each protruding block abuts against the adjacent unlocking piece and the side wall of the containing cavity; all unlocking pieces can be taken out of the sleeve through the grooves, so that after the tensioning head rotates for an angle relative to the sleeve, the convex blocks can be positioned in the corresponding grooves, and can exit the accommodating cavity through the grooves so as to enable the tensioning head to be separated from the sleeve.
  5. 5. A tensioning device according to claim 4, wherein each unlocking member comprises a bolt and a spacer block, the spacer blocks are mutually aligned with a corresponding one of the grooves, and the bolts are inserted through the wall of the sleeve in a pluggable manner from the outer circumferential surface of the sleeve and abut against the tensioning head so as to prevent the spacer blocks from being separated from the accommodating cavities through the grooves.
  6. 6. A tensioning device according to claim 1 or 2, wherein the detection assembly comprises a bracket and a first detection element, a second detection element, a third detection element and a fourth detection element which are arranged on the bracket, wherein the bracket is connected with the shell, the first detection element is arranged right above the machine head end of the bracket, the second detection element is arranged on two sides of the machine head end along the radial direction of the shell, and the fourth detection element is arranged at intervals with the second detection element along the radial direction of the shell and is arranged on two sides of the bracket along the radial direction of the shell; The first detection element is used for measuring the distance between the tensioning screw and the first detection element, the second detection element is used for detecting the diameter of the tensioning screw and the initial position of threads on the tensioning screw, the third detection element is used for measuring the distance between the machine head end and the tensioning baffle of the piece to be tensioned, and the fourth detection element is used for measuring the position of the tensioning head in the machine shell and the distance of the tensioning screw extending into the machine shell.
  7. 7. A tensioning device as claimed in claim 1 or claim 2 further comprising a nut locking assembly provided at the head end, the nut locking assembly having a nut sleeve coaxially disposed with the housing for fitting over a tensioning nut of the member to be tensioned and being controllably rotatable about its central axis to lock the tensioning nut.
  8. 8. The tensioning device of claim 7, wherein the nut lock assembly further comprises: the machine seat is fixedly connected to the shell; The nut sleeve is coaxially arranged at one side of the inner seat in the axial direction and is detachably clamped with the inner seat; the transmission mechanism is coaxially connected to one side, far away from the nut sleeve, of the inner seat in the axial direction and detachably connected to the nut sleeve, and can controllably drive the inner seat to rotate around the central axis of the inner seat relative to the machine seat and drive the nut sleeve to synchronously rotate around the central axis of the inner seat.
  9. 9. A tensioning device as defined in claim 8, further comprising a lubrication assembly provided on the housing, the lubrication assembly comprising a revolving cylinder, a lubrication pump and a lubrication conduit, the lubrication conduit being connected to the revolving cylinder and one end of the lubrication conduit being connected to the lubrication pump, the opposite end of the lubrication conduit being provided with a lubrication nozzle, the revolving cylinder being capable of driving the lubrication conduit to rotate about an axis relative to the housing so that the lubrication nozzle can be inserted into the tensioning head.
  10. 10. A tension machine, comprising: the first rack is provided with a first driving mechanism; the second rack is provided with a second driving mechanism and a third driving mechanism, and is movably connected with the first rack through the second driving mechanism; The tensioning device according to any one of claims 1-9, which is arranged on the second frame and is in transmission connection with the third driving mechanism, wherein the first driving mechanism is used for driving the first frame, the second frame and the tensioning device to move left and right along a first horizontal direction relative to the piece to be tensioned, the second driving mechanism is used for driving the second frame and the tensioning device to move back and forth along a second horizontal direction perpendicular to the first horizontal direction relative to the piece to be tensioned, and the third driving mechanism is used for driving the tensioning device to move up and down along a height direction relative to the piece to be tensioned; The control unit is in communication connection with the detection assembly of the tensioning device, and is used for respectively controlling the first driving mechanism, the second driving mechanism and the third driving mechanism to drive the tensioning device to move according to the measurement signals sent by the detection assembly so as to enable the tensioning head and the piece to be tensioned to be mutually aligned and controlling the tensioning device to automatically tension the piece to be tensioned.

Description

Tensioning device and tensioning machine Technical Field The application relates to the technical field of production of building pipe piles, in particular to a tensioning device and a tensioning machine. Background Along with the development of concrete technology, the technology of concrete pipe piles is mature, and the concrete pipe piles are widely applied to various fields of bridges, ports, railways, hydraulic engineering and the like besides industrial and civil buildings. In the production of concrete pipe piles, firstly, a reinforcement cage with end plates is placed in a pipe pile die, then concrete is fed into the pipe pile die, and then the pipe piles are obtained through the steps of centrifugation, primary steam curing, demoulding and advanced steam curing in sequence. In order to enable the prepared pipe pile to bear higher load in the use process, a prestress tensioning step is required to be added before a centrifugation step, specifically, a steel reinforcement cage in a pipe pile die is stretched through a tensioning machine, and the steel reinforcement cage is kept in a stretched state in the following primary steam curing, demoulding and advanced steam curing steps, so that the load capacity of the prepared pipe pile is improved. In the prior art, the tensioning process usually needs manual operation to be completed. However, the manual tensioning mode has more defects in the tensioning process, and is particularly characterized in that the whole tensioning process is manually controlled, automatic alignment and automatic tensioning cannot be realized, so that the operation efficiency is low, the labor intensity of workers is high, the operation environment condition is poor, and the risk of personal injury accidents caused by stretch-breaking of the reinforcing steel bars can possibly occur in the tensioning process, so that certain potential safety hazards exist. Disclosure of Invention Based on the problems of low operation efficiency, high labor intensity of workers and potential safety hazards caused by manual operation in the existing tensioning process, the tensioning device and the tensioning machine capable of achieving full-automatic tensioning are needed. According to an aspect of the present application, there is provided a tensioning device comprising: The machine shell is provided with a machine tail end and a machine head end which are oppositely arranged in the axial direction of the machine shell; The tension rod assembly can rotate around the central axis of the tension rod assembly relative to the shell and move along the axial direction towards the direction close to the piece to be tensioned so as to engage the tension rod, or can move along the axial direction towards the direction far away from the piece to be tensioned relative to the shell so as to tension the piece to be tensioned; The detection assembly is arranged at the machine head end and is used for measuring the relative position between the tensioning head and the tensioning screw and sending a measurement signal to an external control unit according to the measured relative position, so that the control unit can control the tensioning head to be coaxially opposite to the tensioning screw based on the measurement signal and control the tensioning head and the tensioning screw to be mutually meshed to a preset length. In one embodiment, the casing comprises a casing body and a piston rod which are coaxially arranged, the casing body is provided with a cavity penetrating through two opposite ends of the casing body in the axial direction, the piston rod is movably inserted into the cavity and seals the tail end of the casing body, and the piston rod is provided with a piston hole penetrating through two opposite ends of the casing body in the axial direction; When the tension rod assembly is meshed with the tension screw rod, the tension rod assembly rotates around the central axis of the tension rod assembly and moves along the axial direction towards the direction approaching the piece to be tensioned relative to the machine body and the piston rod; When the tension rod assembly stretches the piece to be stretched, the tension rod assembly is meshed with the tension screw rod and moves along the axial direction along with the piston rod along with the machine body in a direction away from the piece to be stretched. In one embodiment, the tension rod assembly further comprises a tension rod, a sleeve and an unlocking piece, wherein the sleeve is connected to one end of the tension rod in the axial direction, and the unlocking piece is movably arranged in the sleeve and can be taken out from the sleeve; when the unlocking piece is arranged in the sleeve, the tensioning head is inserted into the sleeve and is propped against the unlocking piece, so that the tensioning head and the sleeve are mutually locked; When the unlocking piece is taken out of the sleeve, the tension head can rotate around the central