Pile foundation reserved rib straightening device and construction method thereof

Abstract

The application discloses a pile foundation reserved steel bar straightening device and a construction method thereof, which comprises a pushing device, a contact groove, two connecting devices, an adjusting mechanism, an extension rod and an image acquisition device, and a control device. The fixed end of the pushing device is installed on a base. The contact groove is installed on the pushing end of the pushing device. The two connecting devices are oppositely arranged on the outer sides of the two ends of the contact groove. The connecting device comprises a connecting rod, one end of which is hinged to the base. The adjusting mechanism is used for adjusting the rotating angle of the connecting rod. The extension rod is coaxially connected with the connecting rod, and a hook is fixedly arranged at the extension end of the extension rod. The image acquisition device is fixed on the extension rod, and the acquisition end of the image acquisition device is arranged opposite to the axis of the pushing device. The control device receives image data and controls the working states of the components according to the bending data of the steel bar to be straightened and the position information of the contact groove. The application realizes mechanical straightening through an artificial auxiliary device, avoids the error of subjective judgment, greatly reduces the damage to the steel bar in the straightening process, is beneficial to the rapid correction of the bent steel bar, and effectively improves the straightening accuracy and the straightening efficiency.

Description

Technical Field

[0001] This invention relates to the field of pile foundation construction technology. More specifically, this invention relates to a device for straightening pre-reserved reinforcement bars in pile foundations and its construction method. Background Technology

[0002] In modern building foundation engineering, whether it's a bridge project or a building construction project, pile foundation construction is involved. After the pile foundation construction is completed, the pile head breaking often causes the reserved reinforcement bars at the pile head to bend. The bent reserved reinforcement bars will affect the subsequent splicing and installation of the rebar cage. Therefore, the reserved reinforcement bars at the pile head must be straightened before splicing and installing the rebar cage. The construction space at the pile head location is limited, and large mechanical straightening equipment cannot be used. There are two conventional straightening methods. One is to use ropes for reverse stretching. This method has a large stretching range and requires gradual stretching of the entire reserved reinforcement bar. The back-and-forth swinging can easily cause the reserved reinforcement bar to break at the root, which will seriously affect the normal progress of subsequent construction. The other is to use on-site materials to make a rebar straightening wrench to straighten the rebar. This method requires a lot of manpower, especially for thick rebar, and requires multiple people to cooperate to straighten the rebar successfully. In addition, both of the above methods mainly rely on tools to assist manual straightening. The force applied to the steel bars and the real-time straightening status of the steel bars are judged by the construction personnel by visual inspection and experience. There are many uncertainties involved, making it difficult to achieve a one-time correction, resulting in low construction efficiency and difficulty in guaranteeing the straightening quality. Repeated adjustments can also easily damage the steel bars themselves.

[0003] To solve the above problems, it is necessary to design a straightening device and construction method for pre-reserved reinforcement bars in pile foundations, which can improve the straightening efficiency, avoid damage to the reinforcement bars, and ensure the quality of the straightening construction. Summary of the Invention

[0004] The purpose of this invention is to provide a straightening device for pre-reserved reinforcement bars in pile foundations and its construction method. It mainly uses a manual auxiliary device for mechanical straightening, which avoids errors caused by subjective human judgment, facilitates the rapid correction of bent reinforcement bars, and minimizes damage to the reinforcement bars during the straightening process, effectively improving the straightening accuracy and efficiency.

[0005] To achieve these objectives and other advantages according to the present invention, a straightening device for pre-reserved reinforcement bars in pile foundations is provided, comprising:

[0006] Base;

[0007] A jacking device, the fixed end of which is mounted on the base;

[0008] A contact groove is fixedly installed on the pushing end of the pushing device and its opening is arranged outward along its axial direction.

[0009] Two connecting devices are disposed opposite to each other on the outer sides of the two ends of the contact groove and on a plane parallel to the axis of the pushing device. Each connecting device includes a connecting rod, one end of which is hinged to the base; an adjusting mechanism configured to adjust the rotation angle of the connecting rod relative to the base; and a first telescopic rod coaxially disposed at the other end of the connecting rod.

[0010] Two hooks are respectively set at the telescopic ends of the first telescopic rods of the two connecting devices;

[0011] The detection device includes two image acquisition devices, which are correspondingly set with the two connecting devices. Each image acquisition device is fixed on the corresponding first telescopic rod and its acquisition end is set facing the axis of the pushing device.

[0012] A control device is fixedly mounted on the base. The control device is configured to receive data from the detection device and control the working state of the pushing device, the adjusting mechanism and the first telescopic rod.

[0013] A display, which is fixedly mounted on the base and electrically connected to the control device, is used to display the bending data of the steel bar to be straightened and the position information of the contact groove;

[0014] In the straightening state, the two hooks are hung at the two ends of the bent portion of the steel bar to be straightened, and the contact groove is aligned with the bend vertex of the steel bar along its length.

[0015] Preferably, in the pile foundation pre-reinforced bar straightening device, the opening size of the contact groove is adapted to the bending size of the reinforcing bar to be straightened, and the contact groove includes:

[0016] The base plate is installed on the pushing end of the pushing device and has a moving track embedded in its outer surface along the width direction. The base plate also has a sliding groove that runs through the length direction.

[0017] Two side plates are disposed opposite each other at both ends of the moving track. Each side plate has a wedge-shaped structure and slides along its length under the drive of the moving track. The wedge-shaped inclined surfaces of the two side plates are arranged facing each other.

[0018] Two extension slots are fitted into the two ends of the slide groove and slidably connected thereto. Either extension slot slides along the length of the slide groove under the drive of the drive device.

[0019] The moving track, the driving device, and the control device are all wirelessly connected.

[0020] Preferably, the pile foundation pre-reserved reinforcement straightening device has a fixing device in the middle of the jacking device, a connecting seat between the connecting rod and the first telescopic rod, and the adjusting mechanism includes a second telescopic rod, the two ends of which are respectively hinged to the fixing device and the connecting seat.

[0021] Preferably, in the pile foundation pre-reserved reinforcement straightening device, one end of the hook is detachably connected to the first telescopic rod, and the other end is bent inward along the width direction of the contact groove, and the arc size formed by the bending is adapted to the diameter of the reinforcement to be straightened.

[0022] Preferably, the pile foundation pre-reserved reinforcement straightening device and the detection device further include two angle sensors, which are correspondingly arranged with the two connecting devices. Each angle sensor is electrically connected to the control device and is configured to detect the rotation angle of the corresponding connecting rod relative to the base.

[0023] Preferably, the pile foundation pre-reserved reinforcement straightening device includes a control device comprising a housing fixed on the base and not interfering with the connecting device; a controller disposed inside the housing, the controller being electrically connected to the jacking device, the adjusting mechanism, and the first telescopic rod, and the controller being wirelessly connected to the image acquisition device; and two switches disposed on the housing and used to control the working state of the adjusting mechanism and the first telescopic rod, respectively.

[0024] The present invention also provides a construction method for the pile foundation pre-reserved reinforcement straightening device, comprising:

[0025] S1. Manually adjust the direction of the pre-reserved bar straightening device for the pile foundation so that the opening of the contact groove faces the bent part of the bar to be straightened. Then control the posture of the two connecting devices so that the two hooks are respectively hung on both sides of the bent part of the bar to be straightened.

[0026] S2. Using the line connecting the two hooks and the connection point of the rebar to be straightened as the axis, operate the pile foundation reserved rebar straightening device to rotate around the rebar to be straightened, so that the contact groove is close to the bent part of the rebar to be straightened. At the same time, the real-time data detected by the detection device is transmitted to the control device for analysis, and the obtained bending data of the rebar to be straightened and the position information of the contact groove are output to the display for display.

[0027] S3. Visually confirm the position information of the contact groove. When it is determined that the centerline of the contact groove along the length direction coincides with the bending plane of the reinforcing bar to be straightened, stop rotating the pile foundation reserved reinforcing bar straightening device.

[0028] S4. Control the posture of the two connecting devices according to the display information of the display, so that the two hooks are moved to the two ends of the bending part of the steel bar to be straightened, and the contact groove is set to face the bending vertex of the steel bar to be straightened.

[0029] S5. Control the position of the side plate in the contact groove on the bottom plate and the extension length of the extension groove according to the display information of the display, so that the opening size of the contact groove is adapted to the bending size of the steel bar to be straightened.

[0030] S6. Control the pushing end of the pushing device to push according to the display information of the display, so that the contact groove moves to engage with the bending vertex of the reinforcing bar to be straightened, and then continue to push according to the bending data of the reinforcing bar to be straightened until the bending vertex of the reinforcing bar to be straightened moves to the straight line where its straight part is located, thus completing the straightening construction of the current reinforcing bar to be straightened.

[0031] S7. Control the pushing device and the connecting device to automatically reset.

[0032] Preferably, in the construction method S2 of the pre-reserved reinforcement straightening device for pile foundations, the method by which the control device analyzes the real-time data detected by the detection device to obtain the bending data of the reinforcement to be straightened and the position information of the contact groove includes:

[0033] S21. Based on the design parameters of the pile foundation reserved reinforcement straightening device and the image data acquired by the image acquisition device, establish a three-dimensional data model of the reinforcement to be straightened and the pile foundation reserved reinforcement straightening device.

[0034] S22. Select multiple feature points in the three-dimensional data model, including the two ends, inflection point, bending vertex and radial end point of the curved part of the steel bar to be straightened, the center point and two ends of the centerline of the base plate along the length direction, the intersection of the centerline of the base plate along the width direction and the wedge-shaped inclined surface of the side plate, the intersection of the centerline of the extension groove along the length direction and its outer end, and the intersection of the hook and the steel bar to be straightened.

[0035] S23. Track and identify the three-dimensional coordinates of the multiple feature points, and calculate the real-time bending data of the steel bar to be straightened and the position information of the contact groove;

[0036] The bending data of the steel bars to be straightened includes: the distance between the two ends of the bend, the distance between the two inflection points of the bend, the lateral and longitudinal distances between the bend apex and the two ends of the bend, and the diameter of the steel bar at the bend apex.

[0037] The position information of the contact groove includes: the distance between the two hooks, the lateral and longitudinal distance between the center point of the base plate and the bending vertex of the reinforcing bar to be straightened, the length and width of the contact groove opening, and the distance of the centerline of the base plate along the length direction from the bending plane of the reinforcing bar to be straightened.

[0038] Preferably, in the construction method of the pre-reserved reinforcement straightening device for pile foundation, in S1, the posture of the two connecting devices is manually controlled by the control device; in S4-S7, the working state of each component is automatically controlled by the control device.

[0039] Preferably, in the construction method of the pile foundation reserved reinforcement straightening device, in S4-S6, the distance of the centerline of the base plate along the length direction from the bending plane of the reinforcement to be straightened is continuously monitored. When the deviation distance exceeds the specified limit range, the control device automatically controls each component to stop operating. Then, the rotation angle of the pile foundation reserved reinforcement straightening device relative to the reinforcement to be straightened is manually readjusted. After the control device detects that the deviation distance has stabilized to 0, it automatically controls each component to continue operating.

[0040] The present invention has at least the following beneficial effects:

[0041] 1. This invention employs a mechanical straightening method. A stable three-point support structure is formed around the bent portion of the reinforcing bar through the hook on the connecting device and the contact groove on the jacking device. The straightening direction, the force applied to the reinforcing bar, and the real-time straightening status of the reinforcing bar are all judged and centrally controlled by a manual auxiliary control device combined with data collected by a detection device. Thus, in a visualized and controllable manner, the straightening of reserved reinforcing bars is achieved in a time-saving, labor-saving, and efficient way. This effectively avoids errors caused by subjective human judgment, avoids repeated adjustments to the same reinforcing bar, minimizes damage to the reinforcing bar during the straightening process, and significantly improves straightening accuracy and efficiency. It has advantages such as high efficiency, speed, low labor costs, and strong protection of finished products, solving the problems of easy reinforcing bar breakage, high manpower and material consumption, and low construction efficiency in traditional reinforcing bar straightening methods.

[0042] 2. This invention fully utilizes the flexible adjustable characteristics of the contact groove length, width, and the angle and length of the connecting device. With the cooperation of the detection device, it can accurately identify the structural parameters of the steel bar to be straightened and the relative position information of the contact groove. The working state of the contact groove and the connecting device can be adjusted accordingly through the control device to adapt to the straightening construction of steel bars of various sizes and under various bending conditions. Moreover, the device is simple and easy to operate, requires low professional technical level of construction personnel, and has a wide range of applications.

[0043] 3. The components of this invention are made from existing materials (waste iron plates, steel bars, etc.) or readily available finished products at the construction site, which is conducive to the recycling of construction waste and further reduces construction costs.

[0044] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall structure of a pile foundation pre-reserved reinforcement straightening device according to an embodiment of the present invention;

[0046] Figure 2 This is a front view of the pile foundation pre-reserved reinforcement straightening device described in the above embodiments;

[0047] Figure 3 This is a rear view of the pile foundation pre-reserved reinforcement straightening device described in the above embodiments;

[0048] Figure 4 This is a schematic diagram of the jacking device described in the above embodiments;

[0049] Figure 5 This is a schematic diagram of the contact groove described in the above embodiments;

[0050] Figure 6 This is a schematic diagram of the structure of the display described in the above embodiments;

[0051] Figure 7 This is a schematic diagram of the control device described in the above embodiments.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Base; 2. Pushing device; 21. Jack; 22. Handle; 3. Contact groove; 31. Base plate; 32. Side plate; 33. Extension groove; 34. Base; 35. Battery; 36. Wireless transceiver one; 41. Connecting rod; 42. Connecting seat; 43. First telescopic rod; 44. Second telescopic rod; 45. Hinge seat; 5. Hook; 6. Image acquisition equipment;

[0054] 7. Control device; 71. Housing; 72. Switch; 73. Wireless transceiver II; 74. Charging interface; 75. Spiral cable; 81. Display; 82. Wiring port; 9. Fixing device. Detailed Implementation

[0055] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0056] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0057] like Figure 1-7 As shown, the present invention provides a straightening device for pre-reserved reinforcement bars in pile foundations, comprising:

[0058] Base 1;

[0059] The jacking device 2 has its fixed end mounted on the base;

[0060] The contact groove 3 is fixedly installed on the pushing end of the pushing device 2 and its opening is arranged outward along its axial direction;

[0061] Two connecting devices are arranged opposite each other on the outer sides of the two ends of the contact groove 3 and on a plane parallel to the axis of the pushing device 2. Each connecting device includes a connecting rod 41, one end of which is hinged to the base 1; an adjusting mechanism, which is configured to adjust the rotation angle of the connecting rod 41 relative to the base 1; and a first telescopic rod 43, which is coaxially arranged at the other end of the connecting rod 41.

[0062] Two hooks 5 are respectively set at the telescopic ends of the first telescopic rod 43 of the two connecting devices;

[0063] The detection device includes two image acquisition devices 6, which are correspondingly set with the two connecting devices. Each image acquisition device 6 is fixed on the corresponding first telescopic rod 43 and the acquisition end is set facing the axis of the pushing device 2.

[0064] A control device 7 is fixedly installed on the base 1. The control device 7 is configured to receive data from the detection device and control the working state of the pushing device 2, the adjusting mechanism and the first telescopic rod 43.

[0065] The display 81 is fixedly mounted on the base 1 and electrically connected to the control device 7. The display 81 is used to display the bending data of the steel bar to be straightened and the position information of the contact groove 3.

[0066] In the straightening state, the two hooks 5 are hung at the two ends of the bent part of the steel bar to be straightened, and the contact groove 3 is aligned with the bend vertex of the steel bar along the length of the steel bar to be straightened.

[0067] In the above technical solution, the pre-reserved reinforcement straightening device for pile foundations is mainly used in the straightening construction of pre-reserved reinforcements after the pile head is broken. The root of the pre-reserved reinforcement is still fixed on the pile foundation, and the construction location is obstructed by the inherent structure, limiting the available space. Large reinforcement straightening equipment (such as reinforcement straightening machines) cannot be used effectively. In this case, small straightening tools are usually used to assist construction personnel in manually straightening the reinforcement, such as traditional rope reverse stretching and straightening wrench correction. The stretching / correction actions of the above methods are all manually controlled by construction personnel. The straightening operation is affected by the work experience of construction personnel, and whether the reinforcement is straightened in place also relies on manual visual confirmation. This results in a large number of subjective judgment factors in the straightening construction process, and the construction quality cannot be guaranteed. At the same time, the limitations of manual straightening (inadequate adjustment, over-adjustment, etc.) mean that the straightening process of the same reinforcement usually needs to be repeated many times, which seriously affects the efficiency of the straightening construction. Moreover, the reinforcement, which is already in a bent state, is very prone to damage and breakage during repeated stretching / correction, further affecting the construction quality and subsequent normal progress. Based on the above problems, this invention proposes a mechanical straightening tool suitable for space-constrained construction environments. The jacking device 2 and the connecting device are both mounted on the base 1. The contact groove 3 is mounted on the jacking device 2 for engaging with the curved apex of the reinforcing bar to be straightened. The connecting device is positioned opposite each other on both sides of the jacking device (base) and rotates on the same plane (a plane parallel to the axis of the jacking device). The connecting device achieves a length-extending function through a first telescopic rod 43, with hooks 5 installed at the end of the first telescopic rod for hooking and engaging with the straight portion of the reinforcing bar to be straightened. Thus, during straightening, a three-point support structure is formed on the reinforcing bar to be straightened: two hooks 5 are supported (hung) in opposite directions at the two ends of the curved portion of the reinforcing bar to be straightened; the contact groove 3 is set along the length direction of the reinforcing bar (straight portion) and directly abuts against the outside of its curved apex; then, the jacking device 2 pushes the curved apex towards the straight line where the straight portion is located. In this case, after the pile head is broken, the reserved reinforcement has various bending types. That is, the bending part of the reinforcement to be straightened is not necessarily a regular arc, and its bending apex may deviate from the center line of the bending part and be close to any side. Therefore, the length and rotation angle of the connecting device are set to be adjustable. When the bending apex is offset, the length and rotation angle of the connecting device on one or both sides can be adjusted accordingly. Under the condition that the two hooks 5 are still held at the two ends of the bending part of the reinforcement to be straightened, the contact groove 3 in the middle can be offset accordingly (that is, the distance relative to the two hooks is different) and aligned with the bending apex of the reinforcement to be straightened.The above three-point support structure can effectively ensure the straightening effect of the reinforcing bars. First, by controlling the length and angle of the connecting device, it can be ensured that the bending apex is pushed in a direction perpendicular to the straight part of the reinforcing bar (so that the axis of the pushing device is always perpendicular to the line connecting the two hooks), making the straightening path the shortest and less likely to cause deformation of the bent part of the reinforcing bar in other directions. Second, the hooks can be accurately adjusted to the two ends of the bent part. When the bending apex is subjected to external pushing force, the hooks supporting the bending part can effectively prevent the reinforcing bar at the end of the bent part from undergoing further deformation. At the same time, the bent part of the reinforcing bar that is moving towards the straight part during the straightening process is accurately extended along the length direction of the straight part under the limiting action of the hooks. In addition, a detection device and a control device 7 are also provided. The image acquisition device 6 is located at the end of the first telescopic rod 43 near the hook 5 and does not interfere with the telescopic stroke of the first telescopic rod 43, so as to more comprehensively collect image data of the rebar to be straightened and the contact groove 3. After receiving the image data, the control device 7 can identify and convert the feature dimensions in the image in combination with the actual design parameters of the contact groove or other inherent components, so as to obtain the bending data of the rebar to be straightened (including the size of the bending part and the distance of the bending vertex relative to the end point of the bending part in each direction) and the real-time position information of the contact groove (including the size of the contact groove body and the distance of the contact groove relative to the rebar to be straightened in each direction) and display it through the display 81. The panels of the control device 7 and the display 81 are both mounted on the base and do not interfere with the rotation direction of the connecting rod. After visually confirming the bending data of the rebar to be straightened and the real-time position information of the contact groove, the construction personnel can realize the alignment and straightening of the bending part of the contact groove and the rebar to be straightened by inputting commands to the control device or by the control device automatically adjusting.

[0068] In this embodiment, the jacking device 2 is a hand-cranked jack 21. An electric motor is installed at the shaft of its control handle (ratchet). The control device 7 is electrically connected to the electric motor to control the electric motor to drive the jack and control its working state. A handle 22 is provided on the fixed end of the jack. Construction personnel can lift the entire device and adjust its direction and position through the handle. In actual straightening construction, construction workers can hold the pile foundation reserved bar straightening device and hook the two hooks 5 to the bar to be straightened. According to the information displayed on the display 81, they can manually adjust the pushing direction of the jacking device 2 (i.e., adjust the rotation angle of the overall pile foundation reserved bar straightening device relative to the straight line where the bar to be straightened is located) so that the axis of the jacking device 2 coincides with the bending plane of the bar to be straightened. Then, the posture of the connecting device (the rotation angle of the connecting rod 41 and the length of the first telescopic rod 43) is precisely adjusted by the control device 7 so that the two hooks 5 are just hooked at the ends of the bending part of the bar to be straightened on both sides, and the center of the contact groove 3 is aligned with the bending vertex of the bar to be straightened (the contact groove is located on the outside of the protrusion of the bending part of the bar to be straightened). Then, the jacking distance of the jacking device is precisely adjusted by the control device 7 so that the contact groove 3 is pushed synchronously to the straight line where the straight part of the bar to be straightened is located after accurately contacting the bending vertex of the bar to be straightened. During the aforementioned construction process, the positioning and jacking operation of the pre-reserved reinforcement straightening device for the pile foundation are mainly controlled automatically or manually by the control device based on real-time detection data. The construction personnel only play the role of judging the current construction status based on the display readings and assisting in supporting the overall straightening device accordingly. Even when the control device adopts the manual control mode (manual input of instructions to the control device), the specific adjustment parameters are calculated or judged by the construction personnel based on the display readings, and the execution of the action is still achieved by the control system controlling the corresponding components, thus minimizing the errors that may exist in manual judgment and execution.

[0069] This invention primarily utilizes a jacking device and a connecting device to achieve mechanical straightening. The hooks on the connecting device and the contact grooves on the jacking device work together to form a stable three-point support structure around the bent portion of the rebar. Compared to traditional rope reverse tensioning structures, this straightening structure significantly reduces the scope of the straightening operation. With visualized and controllable straightening direction and distance, the bent portion of the rebar is targeted for straightening. The straightening direction, the force applied to the rebar, and the real-time straightening status of the rebar are all judged and centrally controlled by a manual auxiliary control device combined with data collected by a detection device. This facilitates achieving one (or fewer) adjustments to the bent rebar to the correct position, significantly reducing the total workload, manual operation difficulty, and labor intensity of the straightening operation, improving construction quality and efficiency. Simultaneously, it avoids rebar damage and breakage caused by repetitive adjustment actions during the straightening process, and also improves construction safety.

[0070] In another technical solution, the straightening device for pre-reserved reinforcing bars in the pile foundation has a contact groove 3 whose opening size is adapted to the bending size of the reinforcing bar to be straightened, and the contact groove 3 includes:

[0071] The base plate 31 is installed on the pushing end of the pushing device 2 and has a moving track embedded on its outer surface along the width direction. The base plate 31 also has a sliding groove that runs through the length direction.

[0072] Two side plates 32 are disposed opposite to each other at both ends of the moving track. Each side plate 32 has a wedge-shaped structure and slides along its length under the drive of the moving track. The wedge-shaped inclined surfaces of the two side plates 32 are arranged facing each other.

[0073] Two extension slots 33 are fitted into the two ends of the slide groove and slidably connected thereto. Either extension slot 33 slides along the length direction of the slide groove under the drive of the drive device.

[0074] The moving track, the driving device, and the control device 7 are all wirelessly connected.

[0075] In the above technical solution, the width of the groove structure formed by the contact groove needs to be adapted to the diameter of the bent portion (mainly the bend apex) of the reinforcing bar to be straightened. This ensures that when the contact groove and the bend apex of the reinforcing bar abut, they can interlock and maintain a relatively stable connection during the continuous pushing of the subsequent jacking device. This prevents the center of the contact groove from shifting off from the bend apex, which would affect the straightening effect. Simultaneously, since deformation at other locations on the bent portion of the reinforcing bar, except for the segment that abuts the contact groove, cannot be guaranteed under the indirect influence of external forces (e.g., when the contact groove length is too short, the bent portion segment far from the bend apex cannot be completely straightened and remains in a bent, bulging state), the contact groove also needs to have a sufficient length to match the structure of the bent portion. In summary, setting the contact groove to a structure where both length and width can be adjusted in real time is beneficial for achieving a better and more stable straightening effect and allows the device to be applicable to straightening reinforcing bars of various sizes and bending conditions. The base plate 31 and two side plates 32 together form an inverted trapezoidal groove structure. The width of the contact groove 3 can be adjusted by driving the two side plates 32 to slide synchronously relative to the center of the base plate 31 via a moving track, thus accommodating different rebar diameters. Extension grooves 33 are also provided at both ends of the base plate 31. The length of the contact groove 3 can be adjusted by driving the extension grooves 33 to slide relative to the sliding groove, thus accommodating different bending lengths. Since the inverted trapezoidal groove formed by the base plate 31 and side plates 32 can already achieve lateral limiting of the bending portion of the rebar to be straightened, the extension groove 33 only needs to play a longitudinal limiting role. Therefore, in this embodiment, the extension groove 33 is set as a flat plate structure parallel to the base plate 31, playing an auxiliary straightening role during the jacking process. This prevents the bending rebar segments located outside the inverted trapezoidal groove from failing to be completely straightened under the influence of the central jacking force, which is beneficial for achieving one-time straightening of the rebar and further improving the straightening construction efficiency. Specifically, the moving track can be an electric slide rail, the driving device can be an electric push rod, and the base plate 31 is mounted on the pushing end of the pushing device 2 via a base 34. A battery 35 can be installed on the base to power the moving track and the driving device. A wireless transceiver 36 is also installed on the base 34, which is electrically connected to the moving track and the driving device. A wireless transceiver 73 is installed on the control device 7, enabling bidirectional wireless signal transmission between the contact groove 3 and the control device 7. This facilitates the control device to send signals to control the working state of the contact groove, and also allows the moving track and the driving device to send signals to the controller to provide feedback on the execution results of the control commands.

[0076] In another technical solution, the pile foundation pre-reserved reinforcement straightening device includes a fixing device 9 in the middle of the jacking device 2, a connecting seat 42 between the connecting rod 41 and the first telescopic rod 43, and an adjusting mechanism including a second telescopic rod 44, both ends of which are hinged to the fixing device 9 and the connecting seat 42 respectively. The fixing device 9 is a ring structure, fixedly sleeved on the outer shell of the jacking device 2. The connecting seat 42 is fixedly connected to the connecting rod 41 and the first telescopic rod 43 on the same side. The adjusting mechanism actually adjusts the distance between the connecting seat and the fixing device. Specifically, the second telescopic rod is an electric telescopic rod, electrically connected to the control device, which supplies power to the second telescopic rod and sends control commands to it. The two ends of the second telescopic rod 44 are connected to the connecting seat 42 and the fixing device 9 respectively through the hinge seat 45. Thus, during the adjustment process, the distance between the connecting seat and the fixing device can be adjusted by adjusting the length of the second telescopic rod, thereby adjusting the rotation angle of the connecting rod relative to the base. The end hinge structure of the second telescopic rod can adapt to the change in the connection angle caused by the rotation of the connecting rod relative to the base. By cooperating with the control device and the second telescopic rod, the precise and stable control of the relative rotation angle between the connecting device and the base can be achieved.

[0077] In another technical solution, the pile foundation pre-reserved reinforcement straightening device has a hook 5, one end of which is detachably connected to the first telescopic rod 43, and the other end bent inward along the width direction of the contact groove 3. The arc size formed by the bend is adapted to the diameter of the reinforcement to be straightened. Specifically, the hook is a detachable end. For different reinforcement sizes, various types of hooks can be prefabricated in advance. Construction personnel can replace the appropriate hooks with the appropriate ones before construction begins, according to the design parameters of the reinforcement to be straightened. The root of the hook is installed at the telescopic end along the length direction of the first telescopic rod. The hook-shaped part of the hook extends inward (towards the base) along the width direction of the contact groove, so that the hook-shaped parts of the two hooks can be fitted together and hung on both sides (on the straight part) of the bent part of the reinforcement to be straightened. At this time, the length direction of the contact groove is parallel to the length direction of the reinforcement to be straightened (straight part). In this embodiment, the hook is a semi-circular hook, and the inner diameter of the semi-circle formed by its bending is adapted to the diameter of the steel bar to be straightened. When the hook is attached to the steel bar to be straightened, the steel bar can be just stuck in the arc-shaped structure formed by the bending of the hook, which provides a certain degree of radial restriction on the steel bar. At the same time, it does not affect the axial sliding of the steel bar segment that has been completely straightened relative to the hook during the straightening process.

[0078] In another technical solution, the pile foundation pre-reserved reinforcement straightening device further includes two angle sensors in the detection device, which are correspondingly set with the two connecting devices. Each angle sensor is electrically connected to the control device and is configured to detect the rotation angle of the corresponding connecting rod relative to the base. When the attitude of the connecting device is precisely adjusted by the control device, the alignment of the straightening device with the bending plane of the reinforcement to be straightened is completed, and the angle of the entire straightening device relative to the bending plane of the reinforcement to be straightened no longer changes. At this time, the viewing angle of the image acquisition device is limited (at an almost direct angle, the change in the rotation of the connecting rod on the image is limited). The position data of the connecting rod (rotation angle relative to the base / pushing device) acquired during the attitude adjustment of the connecting device is prone to error. Therefore, an additional angle sensor is set to assist in the real-time attitude detection and feedback of the connecting device. The control device can combine the image data transmitted by the image acquisition device and the angle value data transmitted by the angle sensor to comprehensively judge the real-time status of the reinforcement to be straightened and the straightening device, so as to ensure the accuracy of the analysis results and straightening control of the control device.

[0079] In another technical solution, the pile foundation pre-reserved reinforcement straightening device includes a control device 7 comprising a housing 71 fixed to the base 1 without interfering with the connecting device; a controller disposed inside the housing 71, electrically connected to the jacking device 2, the adjusting mechanism, and the first telescopic rod 43, and wirelessly connected to the image acquisition device 6; and two switches 72 disposed on the housing 71 and used to control the working states of the adjusting mechanism and the first telescopic rod, respectively. The control device 7 also integrates a power mechanism configured to provide power to the jacking device, the adjusting mechanism, the first telescopic rod, the display, and the controller. The image acquisition device 6 can be configured as a miniature camera with its own battery and wireless transmission function. The controller is electrically connected to an external wireless transceiver 73 to receive information from the image acquisition device 6. In this embodiment, all the above components are electronically controlled devices. The first telescopic rod is an electric first telescopic rod, and a cable outlet is provided between the first telescopic rod and the connecting rod (on the connecting seat). The power mechanism can supply power to the first telescopic rod 43 and the adjustment mechanism near the cable outlet via a spiral wire 75. The power mechanism is a rechargeable battery, and a matching charging interface 74 is provided on the outer casing. A wiring port 82 is provided on one side of the display panel 81, which facilitates the connection of the display fixed on the base to the controller using a data transmission cable. Two switches allow construction personnel to manually control the posture of the connecting device in the initial stage of straightening. At this time, the length and angle of the connecting device do not need to be finely adjusted; it is only necessary to ensure that the hooks fall on both sides of the curved part of the rebar to be straightened. Thus, the power system and control system are integrated into the straightening device body, making the straightening device highly portable and convenient for construction personnel to carry the straightening device and move it flexibly on the construction site to perform straightening construction of reserved rebars at different locations.

[0080] The present invention also provides a construction method for the pile foundation pre-reserved reinforcement straightening device, comprising:

[0081] S1. Manually adjust the direction of the pile foundation reserved bar straightening device so that the opening of the contact groove 3 faces the bent part of the bar to be straightened. Then control the posture of the two connecting devices so that the two hooks 5 are respectively hung on both sides of the bent part of the bar to be straightened.

[0082] S2. Using the line connecting the two hooks 5 and the connection point of the rebar to be straightened as the axis, operate the pile foundation reserved rebar straightening device to rotate around the rebar to be straightened, so that the contact groove 3 is close to the bent part of the rebar to be straightened. At the same time, the real-time data detected by the detection device is transmitted to the control device 7 for analysis, and the obtained bending data of the rebar to be straightened and the position information of the contact groove are output to the display for display.

[0083] S3. Visually confirm the position information of the contact groove 3. When it is determined that the centerline of the contact groove along the length direction coincides with the bending plane of the reinforcing bar to be straightened, stop rotating the pile foundation reserved reinforcing bar straightening device.

[0084] S4. Control the posture of the two connecting devices according to the display information of the display 81, so that the two hooks 5 are moved to the two ends of the bending part of the steel bar to be straightened, and the contact groove 3 is set to face the bending vertex of the steel bar to be straightened.

[0085] S5. Control the position of the side plate 32 in the contact groove on the bottom plate 31 and the extension length of the extension groove 33 according to the display information of the display 81, so that the opening size of the contact groove 3 is adapted to the bending size of the steel bar to be straightened.

[0086] S6. According to the display information of the display 81, control the pushing end of the pushing device to push, so that the contact groove 3 moves to engage with the bending vertex of the reinforcing bar to be straightened, and then continue to push according to the bending data of the reinforcing bar to be straightened until the bending vertex of the reinforcing bar to be straightened moves to the straight line where its straight part is located, thus completing the straightening construction of the current reinforcing bar to be straightened.

[0087] S7. Control the pusher 2 and the connecting device to automatically reset.

[0088] In this embodiment, during the entire straightening process, the straightening device is always held by the construction worker, and the weight of the straightening device itself will not affect the straightening quality of the steel bar or cause additional damage. Specifically, in S1, the entire straightening device can be lifted by the handle on the jack, and its position and orientation adjusted. At this time, the position of the hook only needs to be initially adjusted so that it falls on both sides of the bent part of the rebar to be straightened and hooks onto the corresponding rebar segment. In S2, during the rotation of the straightening device, it can be swung back and forth near the bend apex of the rebar to be straightened, allowing the image acquisition device to collect sufficient image data from different angles for the control device to analyze, so as to successfully obtain sufficiently accurate bending data of the rebar to be straightened and the position information of the contact groove. This swaying does not involve straightening or correcting the rebar and is unlikely to cause damage to the rebar. In S3, when it is confirmed that the centerline of the contact groove along the length direction coincides with the bending plane of the rebar to be straightened, it can be considered that the axis of the jacking device is located on the bending plane of the rebar to be straightened (the plane where the bend is located). Therefore, when the jacking device pushes the rebar in the subsequent process, it can be ensured that the contact groove straightens the bend on the original bending plane, and it is not easy to cause additional bending of the bend in other directions, which would affect the straightening efficiency and straightening quality. In S5, the two side plates move synchronously on the base plate and are always symmetrically positioned to ensure that the centerline of the base plate along its length is always directly opposite the bend vertex of the reinforcing bar, preventing any offset. The spacing between the two side plates is adjusted according to the bend diameter of the reinforcing bar to be straightened. Since the bend is not necessarily a regular shape, the extension length of the two extension slots can be adjusted separately according to the actual situation. Here, the extension slots do not need to extend completely to the end point of the bend on the same side. The outer end of either extension slot can extend to the position corresponding to the inflection point of the bend of the reinforcing bar to be straightened on the same side, thus achieving the desired straightening effect. To the greatest extent possible, the bending part can be adjusted to the correct position as a whole during the subsequent jacking process. In S6, after the jacking device pushes the bending apex of the steel bar to be straightened and begins to move, the bending part undergoes corresponding deformation. The original two ends of the bending part are straightened first under the reverse support force of the hook and continue to move outward (straight part). During this process, it is necessary to coordinate with the fine adjustment of the overall position of the straightening device so that the center of the contact groove is always directly aligned with the bending apex of the steel bar to be straightened, so as to ensure the rationality of the bending part's stress structure during the straightening process and the final straightening effect.

[0089] In another technical solution, in the construction method S2 of the pile foundation pre-reserved reinforcement straightening device, the method by which the control device analyzes the real-time data detected by the detection device to obtain the bending data of the reinforcement to be straightened and the position information of the contact groove includes:

[0090] S21. Based on the design parameters of the pile foundation reserved reinforcement straightening device and the image data acquired by the image acquisition device, establish a three-dimensional data model of the reinforcement to be straightened and the pile foundation reserved reinforcement straightening device.

[0091] Specifically, SFM technology can be used to perform three-dimensional reconstruction based on images acquired from multiple different perspectives by image acquisition equipment. The origin is taken as the end point of the bending part of the rebar to be straightened near the root of the rebar, the length direction of the rebar to be straightened is taken as the X-axis, and the bending plane of the rebar to be straightened is taken as the XOZ plane. A three-dimensional data model of the overall structure of the rebar to be straightened and the straightening device is established. The actual distance between any two points in the model can be calculated based on the known design parameters of the pile foundation reserved rebar straightening device.

[0092] S22. Select multiple feature points in the three-dimensional data model, including the two ends, inflection point, bending vertex and radial end of the curved part of the reinforcing bar to be straightened, the center point and two ends of the centerline of the base plate 31 along the length direction, the intersection of the centerline of the base plate 31 along the width direction and the wedge-shaped inclined surface of the side plate 32, the intersection of the centerline of the extension groove 33 along the length direction and its outer end, and the intersection of the hook 5 and the reinforcing bar to be straightened.

[0093] S23. Track and identify the three-dimensional coordinates of the multiple feature points, and calculate the real-time bending data of the steel bar to be straightened and the position information of the contact groove;

[0094] The bending data of the steel bars to be straightened includes: the distance between the two ends of the bend (the difference in x-coordinates between the two ends of the bend), the distance between the two inflection points of the bend (the difference in x-coordinates between the two inflection points of the bend), the lateral and longitudinal distances between the bend apex and the two ends of the bend (the difference in x-coordinates and z-coordinates between the bend apex and the two ends of the bend), and the diameter of the steel bar at the bend apex (the distance between the radial ends of the bend apex).

[0095] The position information of the contact groove includes: the distance between the two hooks (the difference in x-coordinates of the intersection points of the hooks and the reinforcing bars to be straightened), the lateral and longitudinal distances between the center point of the base plate 31 and the bending vertex of the reinforcing bar to be straightened (the difference in x-coordinates and z-coordinates between the center point of the centerline of the base plate 31 along the length direction and the bending vertex), the length and width of the opening of the contact groove 3 (the difference in x-coordinates of the intersection points of the centerline of the extension groove 33 along the length direction and its outer end, and the difference in y-coordinates of the intersection points of the centerline of the base plate 31 along the width direction and the wedge-shaped inclined surface of the side plate 32), and the distance of the centerline of the base plate 31 along the length direction from the bending plane of the reinforcing bar to be straightened (the absolute values ​​of the y-coordinates of the two endpoints of the centerline of the base plate 31 along the length direction).

[0096] In the above technical solution, during the positioning and straightening process from S3 to S6, the position and posture of the rebar to be straightened and the straightening device change. Therefore, during this process, the detection device continuously collects detection data and transmits it to the control device to update the established three-dimensional data model in real time, so as to better guide subsequent construction. In addition, since the viewing angle of the image acquisition device is relatively fixed after S3, errors are likely to occur in the detection of the rotation angle of the connecting device (connecting rod). In this embodiment, an angle sensor can be added at the hinge between the connecting rod and the base to assist in the detection of the working status of the connecting device and transmit the detection data to the control device to assist in the correction of the three-dimensional data model, so as to ensure the realism and accuracy of the model, thereby ensuring the quality of the straightening construction.

[0097] Specifically, based on the bending data of the reinforcing bar to be straightened and the position information of the contact groove, in S3, the distance of the centerline of the base plate along the length direction from the bending plane of the reinforcing bar to be straightened is visually confirmed. When the deviation distance is displayed as 0 (that is, the y coordinates of the two ends of the centerline of the base plate along the length direction are both 0), it can be determined that the centerline of the contact groove along the length direction coincides with the bending plane of the reinforcing bar to be straightened.

[0098] In S4, the method for controlling the posture of the two connecting devices includes: adjusting the lateral distance between the center point of the base plate and the bending vertex of the reinforcing bar to be straightened to 0 through the adjustment mechanism in cooperation with the first telescopic rod, while making the distance between the two hooks equal to the distance between the two endpoints of the bending part; it is worth noting that after the posture of the connecting devices is adjusted, the axis of the jacking device needs to be perpendicular to the length direction of the reinforcing bar to be straightened. The z-coordinates of the two endpoints of the centerline of the base plate along the length direction can be tracked and identified to ensure that the difference between the z-coordinates of the two endpoints of the base plate is 0 after the posture of the connecting devices is adjusted, thus ensuring that the axis of the jacking device is perpendicular to the length direction of the reinforcing bar to be straightened.

[0099] In S5, the method for controlling the position of the side plate on the bottom plate and the extension length of the extension groove in the contact groove includes: adjusting the length of the contact groove opening to be equal to the distance between the two inflection points of the bend through the driving device, and adjusting the width of the contact groove opening to be equal to the diameter of the reinforcing bar at the bend apex through the moving track; wherein, the reinforcing bar segment located between the two inflection points has the same bending direction (concave), and the length of the contact groove opening (the distance between the outer ends of the two extension grooves) covering this part of the reinforcing bar segment can ensure the straightening of the concave part of the bend; the reinforcing bar segment of the bend located outside the inflection point is convex, and its bending direction is the same as the pushing direction of the pushing device, which makes it easy to straighten under the combined influence of the hook limit at the end point and the pushing force at the bend apex;

[0100] In S6, the method for controlling the pushing end of the pushing device includes: first adjusting the longitudinal distance between the center point of the base plate and the bending vertex of the reinforcing bar to be straightened to 0 by the pushing device, and then controlling the center point of the base plate and the bending vertex of the reinforcing bar to move synchronously until the longitudinal distance between the bending vertex and the two ends of the bending part is 0.

[0101] In another technical solution, the construction method of the pile foundation pre-reserved reinforcement straightening device includes the following steps: In S1, the posture of the two connecting devices is manually controlled by the control device; in S4-S7, the working state of each component is automatically controlled by the control device. Manual control involves construction personnel inputting control commands through the control system's external panel, operation buttons, etc., to control the working state of the components. Automatic control involves automatically controlling the action logic of each component according to the built-in program of the control system (control device). Specifically, in S4-S7, the control device can monitor the current straightening status (progress) in real time through a detection device. When it detects that the previous process has been completed, the control device automatically starts executing the action commands for the next process. Furthermore, in S4 and S6, due to the relative positional changes between the contact groove / connecting device and the reinforcement to be straightened during the action execution (S5 is an independent change in the contact groove structure), manual fine-tuning of the overall straightening device's position is required while the control device is automatically controlling it, to ensure accurate alignment of the contact groove center with the bending apex.

[0102] In another technical solution, in the construction method of the pile foundation pre-reserved reinforcement straightening device, S4-S6, the distance between the centerline of the base plate 31 along its length and the bending plane of the reinforcement to be straightened is continuously monitored. When the deviation distance exceeds the specified limit, the control device 7 automatically controls each component to stop operating. Then, the rotation angle of the pile foundation pre-reserved reinforcement straightening device relative to the reinforcement to be straightened is manually readjusted. After the control device 7 detects that the deviation distance has stabilized to 0, it automatically controls each component to continue operating. Specifically, the specified limit range is |y0|≤5mm, that is, the distance between a point on the centerline of the base plate along its length and the bending plane does not exceed 5mm. Therefore, during the straightening process, a certain rotation angle is allowed between the axis of the jacking device and the bending plane of the reinforcing bar to be straightened. When the rotation angle is too large (i.e., the deviation distance exceeds the specified limit), the deviation of the jacking direction has exceeded the allowable error range. Continuing the construction will affect the straightening quality. Therefore, it is necessary to stop the current straightening action, recalibrate the jacking direction (i.e., the centerline of the base plate along the length direction returns to the bending plane of the reinforcing bar to be straightened) before continuing the construction.

[0103] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A device for straightening pre-reserved reinforcement bars in pile foundations, characterized in that, include: Base; A jacking device, the fixed end of which is mounted on the base; A contact groove is fixedly installed on the pushing end of the pushing device and its opening is arranged outward along its axial direction. Two connecting devices are disposed opposite to each other on the outer sides of the two ends of the contact groove and on a plane parallel to the axis of the pushing device. Each connecting device includes a connecting rod, one end of which is hinged to the base. An adjusting mechanism is configured to adjust the rotation angle of the connecting rod relative to the base. The first telescopic rod is coaxially disposed at the other end of the connecting rod; Two hooks are respectively set at the telescopic ends of the first telescopic rods of the two connecting devices; The detection device includes two image acquisition devices, which are correspondingly set with the two connecting devices. Each image acquisition device is fixed on the corresponding first telescopic rod and its acquisition end is set facing the axis of the pushing device. A control device is fixedly mounted on the base. The control device is configured to receive data from the detection device and control the working state of the pushing device, the adjusting mechanism and the first telescopic rod. A display, which is fixedly mounted on the base and electrically connected to the control device, is used to display the bending data of the steel bar to be straightened and the position information of the contact groove; In the straightening state, the two hooks are hung at the two ends of the bent part of the steel bar to be straightened, and the contact groove is aligned with the bend vertex of the steel bar along the length of the steel bar to be straightened. The opening size of the contact groove is adapted to the bending size of the reinforcing bar to be straightened, and the contact groove includes: The base plate is installed on the pushing end of the pushing device and has a moving track embedded in its outer surface along the width direction. The base plate also has a sliding groove that runs through the length direction. Two side plates are disposed opposite each other at both ends of the moving track. Each side plate has a wedge-shaped structure and slides along its length under the drive of the moving track. The wedge-shaped inclined surfaces of the two side plates are arranged facing each other. Two extension slots are fitted into the two ends of the slide groove and slidably connected thereto. Either extension slot slides along the length of the slide groove under the drive of the drive device. The moving track, the driving device, and the control device are all wirelessly connected. The control device analyzes the real-time data detected by the detection device to obtain the bending data of the rebar to be straightened and the position information of the contact groove, including: establishing a three-dimensional data model of the rebar to be straightened and the rebar straightening device based on the design parameters of the pile foundation reserved rebar straightening device and the image data acquired by the image acquisition device; selecting multiple feature points in the three-dimensional data model, including the two ends, inflection point, bending vertex and radial end of the bending part of the rebar to be straightened, the center point and two ends of the centerline of the base plate along the length direction, the intersection of the centerline of the base plate along the width direction and the wedge-shaped inclined surface of the side plate, the intersection of the centerline of the extension groove along the length direction and its outer end, and the intersection of the hook and the rebar to be straightened; tracking and identifying the three-dimensional coordinates of the multiple feature points, and calculating the real-time bending data of the rebar to be straightened and the position information of the contact groove.

2. The pile foundation pre-reserved reinforcement straightening device as described in claim 1, characterized in that, The jacking device is provided with a fixing device in the middle, and a connecting seat is provided between the connecting rod and the first telescopic rod. The adjusting mechanism includes a second telescopic rod, the two ends of which are respectively hinged to the fixing device and the connecting seat.

3. The pile foundation pre-reserved reinforcement straightening device as described in claim 1, characterized in that, One end of the hook is detachably connected to the first telescopic rod, and the other end is bent inward along the width direction of the contact groove, with the arc size formed by the bend being adapted to the diameter of the steel bar to be straightened.

4. The pile foundation pre-reserved reinforcement straightening device as described in claim 1, characterized in that, The detection device also includes two angle sensors, which are correspondingly arranged with the two connecting devices. Each angle sensor is electrically connected to the control device and is configured to detect the rotation angle of the corresponding connecting rod relative to the base.

5. The pile foundation pre-reserved reinforcement straightening device as described in claim 1, characterized in that, The control device includes a housing fixed to the base and not interfering with the connecting device; a controller disposed inside the housing, which is electrically connected to the pushing device, the adjusting mechanism, and the first telescopic rod, and is wirelessly connected to the image acquisition device; and two switches disposed on the housing and used to control the working state of the adjusting mechanism and the first telescopic rod, respectively.

6. A construction method for a pile foundation pre-reserved reinforcement straightening device as described in claim 1, characterized in that, include: S1. Manually adjust the direction of the pre-reserved bar straightening device for the pile foundation so that the opening of the contact groove faces the bent part of the bar to be straightened. Then control the posture of the two connecting devices so that the two hooks are respectively hung on both sides of the bent part of the bar to be straightened. S2. Using the line connecting the two hooks and the connection point of the rebar to be straightened as the axis, operate the pile foundation reserved rebar straightening device to rotate around the rebar to be straightened, so that the contact groove is close to the bent part of the rebar to be straightened. At the same time, the real-time data detected by the detection device is transmitted to the control device for analysis, and the obtained bending data of the rebar to be straightened and the position information of the contact groove are output to the display for display. S3. Visually confirm the position information of the contact groove. When it is determined that the centerline of the contact groove along the length direction coincides with the bending plane of the reinforcing bar to be straightened, stop rotating the pile foundation reserved reinforcing bar straightening device. S4. Control the posture of the two connecting devices according to the display information of the display, so that the two hooks are moved to the two ends of the bending part of the steel bar to be straightened, and the contact groove is set to face the bending vertex of the steel bar to be straightened. S5. Control the position of the side plate in the contact groove on the bottom plate and the extension length of the extension groove according to the display information of the display, so that the opening size of the contact groove is adapted to the bending size of the steel bar to be straightened. S6. Control the pushing end of the pushing device to push according to the display information of the display, so that the contact groove moves to engage with the bending vertex of the reinforcing bar to be straightened, and then continue to push according to the bending data of the reinforcing bar to be straightened until the bending vertex of the reinforcing bar to be straightened moves to the straight line where its straight part is located, thus completing the straightening construction of the current reinforcing bar to be straightened. S7. Control the pushing device and the connecting device to automatically reset.

7. The construction method of the pile foundation pre-reserved reinforcement straightening device as described in claim 6, characterized in that, In S2, the method by which the control device analyzes the real-time data detected by the detection device to obtain the bending data of the reinforcing bar to be straightened and the position information of the contact groove includes: S21. Based on the design parameters of the pile foundation reserved reinforcement straightening device and the image data acquired by the image acquisition device, establish a three-dimensional data model of the reinforcement to be straightened and the pile foundation reserved reinforcement straightening device. S22. Select multiple feature points in the three-dimensional data model, including the two ends, inflection point, bending vertex and radial end of the curved part of the steel bar to be straightened, the center point and two ends of the centerline of the base plate along the length direction, the intersection of the centerline of the base plate along the width direction and the wedge-shaped inclined surface of the side plate, the intersection of the centerline of the extension groove along the length direction and its outer end, and the intersection of the hook and the steel bar to be straightened. S23. Track and identify the three-dimensional coordinates of the multiple feature points, and calculate the real-time bending data of the steel bar to be straightened and the position information of the contact groove; The bending data of the steel bars to be straightened includes: the distance between the two ends of the bend, the distance between the two inflection points of the bend, the lateral and longitudinal distances between the bend apex and the two ends of the bend, and the diameter of the steel bar at the bend apex. The position information of the contact groove includes: the distance between the two hooks, the lateral and longitudinal distance between the center point of the base plate and the bending vertex of the reinforcing bar to be straightened, the length and width of the contact groove opening, and the distance of the centerline of the base plate along the length direction from the bending plane of the reinforcing bar to be straightened.

8. The construction method of the pile foundation pre-reserved reinforcement straightening device as described in claim 7, characterized in that, In S1, the posture of the two connecting devices is manually controlled by the control device; in S4-S7, the working state of each component is automatically controlled by the control device.

9. The construction method of the pile foundation pre-reserved reinforcement straightening device as described in claim 8, characterized in that, In S4-S6, the distance of the centerline of the base plate along the length direction from the bending plane of the reinforcing bar to be straightened is continuously monitored. When the deviation distance exceeds the specified limit, the control device automatically controls each component to stop operating. Then, the rotation angle of the pile foundation reserved reinforcement straightening device relative to the reinforcing bar to be straightened is manually readjusted. After the control device detects that the deviation distance has stabilized to 0, it automatically controls each component to continue operating.

Images