A device and method for in-situ forming of spiral stirrups

Abstract

This invention belongs to the field of wire spiral forming technology, and relates to an in-situ forming device for spiral stirrups, including a driving straightening system, a bending forming system, and a stirrup conveying system. The driving straightening system includes a straightening unit, guide columns, and guide wheels. The straightening unit is used to straighten the bent stirrups, and the guide columns and guide wheels are located at the outlet end of the straightening unit, guiding the straightened steel bars. The bending forming system includes guide rail supports and bending guide wheels. The guide rail supports are arranged along the outer circumference of the newly added section of the pier. A first sliding rail is prefabricated on the guide rail supports, and a first slider is installed on the first sliding rail. The bending guide wheels are installed on the first slider through guide wheel fixing frames. Several guide rail supports are connected by steel bars. The spiral stirrup conveying system is used to deliver the bent spiral stirrups to the top of the pier. This solves the problem that it is currently impossible to achieve in-situ bending of spiral stirrups next to the pier to be reinforced.

Description

Technical Field

[0001] This invention belongs to the field of wire spiral forming technology, specifically relating to an in-situ forming device and method for spiral stirrups. Background Technology

[0002] Reinforced concrete bridges that have been in service for many years often have durability problems and urgently need to be reinforced. The cross-section enlargement method can significantly improve the strength, stiffness and ductility of components and has a wide application in the field of bridge reinforcement. Since the spiral stirrups are continuous as a whole, they can provide effective restraint for the concrete in the plastic hinge area. Therefore, the "Specification for Design of Strengthening Highway Bridges" (JTG / TJ22—2008) recommends that the transverse reinforcement be spiral stirrups when the cross-section enlargement method is used for reinforcement in the plastic hinge area of ​​the pier. At present, the production process of spiral stirrups can be divided into the following two categories: (1) manual bending: first, the end of the stirrup is fixed to the winding section, and the steel bar is bent into a spiral stirrup manually; (2) mechanical bending: the spiral stirrup steel cage is prefabricated by the spiral stirrup forming device and then hoisted and installed. However, in reinforcement projects, since the superstructure of the bridge already exists, it is difficult to hoist the prefabricated spiral stirrups. The manual bending method is usually adopted. With this method, it is not only difficult to control the diameter and spacing of the spiral stirrups, but also has the disadvantages of high labor intensity and long working cycle.

[0003] Chinese patent CN 216911925 U discloses a spiral stirrup forming device. It features a winding section on the rotating turntable of a rebar bending machine for winding rebar, a rebar inlet at the bottom of the winding section for fixing one end of the rebar, and two sides of the operating table to prevent the rebar from winding onto the winding section, thus enabling rapid production of spiral stirrups. However, it is essentially still a prefabrication device for spiral stirrups and cannot automatically bend spiral stirrups directly onto the outer surface of existing piers.

[0004] Therefore, there is an urgent need for a device that can bend spiral stirrups in situ next to the pier to be reinforced. Summary of the Invention

[0005] The purpose of this invention is to provide an in-situ forming device and method for spiral stirrups, which solves the problem that it is currently impossible to bend spiral stirrups in situ next to the pier to be reinforced.

[0006] This invention is achieved through the following technical solution:

[0007] A spiral stirrup in-situ forming device includes a driving and straightening system, a bending and forming system, and a stirrup conveying system;

[0008] The drive straightening system includes a straightening unit, guide columns, and guide wheels. The straightening unit is used to straighten bent stirrups. The guide columns and guide wheels are located at the outlet end of the straightening unit. The guide columns are used to guide the straightened steel bars horizontally, and the guide wheels are used to guide the straightened steel bars vertically.

[0009] The bending forming system is used to bend steel bars into spiral stirrups with specified spacing and curvature according to input parameters. It includes a guide rail support and a bending guide wheel. Several guide rail supports are provided and arranged along the outer circumference of the newly added section of the pier, and are fixedly installed on the pier platform. A first sliding rail is prefabricated on the guide rail support, and a first slider is installed on the first sliding rail. The bending guide wheel is installed on the first slider through a guide wheel fixing frame.

[0010] The reinforcing bars, guided by the guide wheels, pass through the guide wheels of the nearest guide rail bracket, and several guide rail brackets are connected by the passing of reinforcing bars;

[0011] A spiral stirrup delivery system is used to deliver bent spiral stirrups to the top of the pier column.

[0012] Furthermore, the drive straightening system is installed on the bridge abutment. The drive straightening system includes a first stepper motor and straightening feed wheels. There are several pairs of straightening feed wheels arranged horizontally in sequence, and there is a gap in the middle of each pair of straightening feed wheels for passing through the reinforcing bars.

[0013] The straightening feed wheel is installed inside a rectangular frame. The two ends of the rectangular frame are connected to rotating shafts. One end of the rotating shaft is electrically connected to the first servo motor, which drives the rotating shaft to rotate.

[0014] Furthermore, the guide wheel is fixed to the first slider by a guide wheel fixing bracket, and the first slider has a ring of circular threaded holes;

[0015] The guide wheel mounting bracket is L-shaped, with circular through holes arranged in a ring at the bottom;

[0016] The circular through hole and the circular threaded hole are positioned correspondingly. When the guide wheel fixing bracket rotates to the set tilt angle, the guide wheel fixing bracket is fixedly connected to the first slider by bolts.

[0017] Furthermore, the upper part of the guide wheel fixing frame has a horizontally arranged circular through hole, and a threaded rod is installed in the circular through hole. The bending guide wheel consists of multiple horizontally arranged guide wheels, and the bending guide wheel is connected to the threaded rod.

[0018] The position of the bending guide wheel can be adjusted by adjusting the position of the threaded rod in the horizontally arranged circular through hole; the curvature of the inserted reinforcing bar can be adjusted by adjusting the relative position of the guide wheel.

[0019] Furthermore, the spiral stirrup conveying system includes a pairing circular sliding rail, a second sliding rail, a lead screw, and a PLC control system;

[0020] The matching circular sliding track is fixed on the cover beam;

[0021] A second slider is placed on the paired circular sliding track, and an annular rack is arranged along the outer circumference of the paired circular sliding track; a gear is located on the upper part of the second slider, and the gear meshes with the annular rack; the gear is connected to a second stepper motor for driving the second slider to slide on the paired circular sliding track;

[0022] The second sliding track is arranged below the second slider, and a third slider is arranged on the second sliding track; one end of the third slider is connected to a bent stirrup, and the other end is connected to a lead screw.

[0023] The lead screw is connected to a third stepper motor, which drives the lead screw to move vertically, thereby controlling the displacement of the third slider on the second sliding track.

[0024] The PLC control system is connected to the second and third stepper motors to control the second slider to rotate around the circumference and the third slider to lift, so as to gradually convey the formed spiral stirrups to the top of the pier.

[0025] Furthermore, the curvature of the assembled circular sliding track is greater than the curvature of the bent spiral stirrup.

[0026] Furthermore, the circular sliding track consists of two semicircular tracks, which are fixed to the cover beam by a second expansion bolt.

[0027] Furthermore, a limit block is also installed on the guide rail bracket. After the position of the first slider on the first sliding rail is adjusted, the limit block is used to fix the position of the first slider.

[0028] The present invention also discloses a working method of the in-situ forming device for spiral stirrups, comprising the following steps:

[0029] S1. Place a drive straightening system on the pier cap, arrange a bending forming system along the circumference of the newly added spiral stirrups on the pier cap, and fix the spiral stirrup conveying system at the bottom of the pier cap beam.

[0030] S2. Adjust the positions of the guide column and guide wheel according to the relative positions of the drive straightening system and the bending forming system;

[0031] Adjust the height of the first slider in the bending forming system, the tilt angle of the guide wheel, and the relative position of the bending guide wheel according to the spacing of the reinforcing spiral hoops and the rotation radius of the spiral hoops;

[0032] S3. The steel bars are then delivered to the drive straightening system. After straightening, the steel bars are delivered to the bending and forming system via guide columns and guide wheels. After passing through the first bending guide wheel, the steel bars have been initially bent according to the set angle and curvature. At this time, they are manually delivered to the subsequent three-dimensional guide wheels. After multiple bending and corrections, the steel bars meet the required spacing and curvature.

[0033] After the reinforcing bars pass through the bending and forming system, the ends of the reinforcing bars are connected to the spiral stirrup conveying system. At this time, the spiral stirrup conveying system is operated to guide the spiral stirrups upward.

[0034] Compared with the prior art, the present invention has the following beneficial technical effects:

[0035] This invention discloses an in-situ spiral stirrup forming device that integrates a rebar straightening device and a stirrup bending device. The straightening feed wheel simultaneously drives the rebar forward and completes the straightening process. Integrating straightening and rebar delivery reduces a step in the entire construction process, minimizing space occupation and improving the efficiency of spiral stirrup production. This invention also designs a device capable of in-situ bending spiral stirrups next to the pier to be reinforced. The straightened rebar, anchored to the pier cap, can be directly wound with spiral stirrups along the newly added longitudinal reinforcement of the reinforced column via a stirrup bending system. The bending forming system contains multiple spiral stirrup bending devices. After initial adjustment of the spiral stirrups according to the set spacing and curvature, multiple corrections are performed. Each bending device is independent and flexible in installation location, allowing for selection of installation positions based on the reinforcement project requirements. However, when the spiral stirrups spiral upwards and wrap around the pier to be reinforced, they may sag under gravity, making precise control of the stirrup spacing difficult. Therefore, the present invention also includes a spiral stirrup conveying system, which connects the end of the spiral stirrup to the slider on the sliding track. During the spiral stirrup winding process, the slider is gradually lifted on the sliding track according to the spiral stirrup winding situation and rotates along the track fixed below the cap beam.

[0036] Furthermore, the spiral stirrup conveying system comprises two parts: annular displacement and longitudinal displacement, which ultimately merge into the upward winding motion of the stirrup. The annular displacement mainly consists of a matching circular sliding track, a second slider, and a gear and rack mechanism. The gear and rack mechanism drives the second slider to move in a circular motion around the matching circular sliding track. The longitudinal displacement mainly consists of a second sliding track and a lead screw mechanism. The lead screw mechanism drives the second slider to move upward along the second slider track, thus gradually conveying the formed spiral stirrup towards the top of the pier.

[0037] Furthermore, since the radius of rotation of the sliding track is slightly larger than the diameter of the spiral stirrup, the spiral stirrup will not conflict with the newly added longitudinal reinforcement during the process of the spiral stirrup rotating and rising.

[0038] Furthermore, a limit block is installed on the guide rail bracket, allowing the first slider to be adjusted in position on the first sliding track and fixed at the corresponding height by the limit block, thus preventing the first slider from shifting in position due to external forces. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of an in-situ forming device for spiral stirrups according to the present invention;

[0040] Figure 2 This is a top view of the drive straightening system and bending forming system of the present invention;

[0041] Figure 3 This is a top view of the bending forming apparatus of the present invention;

[0042] Figure 4 This is a side view of the bending forming apparatus of the present invention;

[0043] Figure 5 This is a front view of the bending forming apparatus of the present invention;

[0044] Figure 6 This is a bottom view of the stirrup conveying system of the present invention;

[0045] Figure 7 This is a partial front view of the stirrup conveying system of the present invention;

[0046] Figure 8 This is a partial top view of the stirrup conveying system of the present invention.

[0047] In the picture:

[0048] 1. Straightening drive system; 2. Bending and forming system; 3. Spiral stirrup conveying system;

[0049] 101. Rectangular frame; 102. Straightening feed roller; 103. First stepper motor; 104. Rotating shaft; 105. Guide column; 106. Guide wheel;

[0050] 201. Guide rail bracket; 202. First expansion bolt; 203. First sliding rail; 204. First slider; 205. Limiting block; 206. Circular threaded holes arranged in annular pattern; 207. Guide wheel fixing bracket; 208. Circular through hole arranged in annular pattern; 209. Bolt; 210. Horizontally arranged circular through hole; 211. Bending guide wheel; 212. Threaded rod; 213. Nut;

[0051] 301. Interlocking circular sliding track; 302. Second expansion bolt; 303. Second slider; 304. Ring rack; 305. Gear; 306. Second stepper motor; 307. Second sliding track; 308. Third slider; 309. Lead screw; 310. Lead screw rod; 311. Third stepper motor; 312. PLC control system;

[0052] 401. New stirrups; 402. Bridge piers; 403. Pier caps; 404. Cap beams; 405. New longitudinal reinforcement. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the present invention clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention; that is, the described embodiments are only a part of the embodiments of the present invention, and not all of them.

[0054] The components described and illustrated in the accompanying drawings and embodiments of this invention can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the invention provided in the following drawings is not intended to limit the scope of the claimed invention, but merely to illustrate one selected embodiment of the invention. All other embodiments obtained by those skilled in the art based on the accompanying drawings and embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0055] It should be noted that the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, element, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to the process, element, method, article, or apparatus. Furthermore, the terms "horizontal" and "vertical" are based on the orientation and positional relationship of the devices or components shown in the accompanying drawings and are used only for better description of the invention, not to require that the shown devices, components, or apparatus must have that specific orientation, and therefore should not be construed as limiting the invention.

[0056] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0057] like Figure 1 As shown, the present invention discloses an in-situ forming device for spiral stirrups, including a driving and straightening system 1, a bending and forming system 2, and a spiral stirrup conveying system 3.

[0058] like Figure 1 , Figure 2As shown, the main function of the straightening system 1 is to straighten and drive the entire coil of reinforcing bars forward. It includes a rectangular frame 101, straightening feed rollers 102, a first stepper motor 103, a rotating shaft 104, guide posts 105, and guide wheels 106. The straightening feed rollers 102 are arranged horizontally in pairs on the rectangular frame 101, with a hole in the middle for passing through the reinforcing bars. The first stepper motor 103 drives the rotating shafts 104 located at both ends of the frame, which in turn drive the straightening feed rollers 102 at the ends to rotate, thereby straightening and driving the newly added stirrups 401. The straightened reinforcing bars are guided horizontally by the guide posts 105 and vertically by the guide wheels 106, and then the reinforcing bars can be transmitted to the bending and forming system 2.

[0059] Figures 1-5 As shown, the bending forming system 2 mainly functions to bend the stirrups into spiral stirrups with specified spacing and curvature according to the input parameters. It includes a guide rail bracket 201, a first expansion bolt 202, a first sliding rail 203, a first slider 204, a limiting block 205, a circularly arranged threaded hole 206, a guide wheel fixing bracket 207, a circularly arranged through hole 208, a bolt 209, a horizontally arranged circular through hole 210, a bending guide wheel 211, a threaded rod 212, and a nut 213.

[0060] The guide rail bracket 201 is arranged along the outer circumference of the newly added section of the pier, and its arrangement direction should be tangent to the outer circumference. The guide rail bracket 201 is fixed to the pier cap by the first expansion bolt 202. The guide rail bracket 201 is used to place the vertically arranged first sliding rail 203. The first slider 204 can be adjusted on the first sliding rail 203 and fixed at the corresponding height by the limiting block 205. The first slider 204 has a circular threaded hole 206 arranged in annularly. The guide wheel fixing bracket 207 is L-shaped and has a circular through hole 208 arranged in annularly at the bottom. The circular through hole 208 and the circular threaded hole 206 are corresponding in position. After the guide wheel fixing bracket 207 is rotated to the set tilt angle, it can be connected to the first slider 204 by bolt 209. The tilt angle of the inserted reinforcing bar can be adjusted by adjusting the tilt angle of the guide wheel fixing bracket 207. The upper part of the guide wheel fixing bracket 207 has a horizontally arranged circular through hole 210.

[0061] The bending guide wheels 211 consist of three or more horizontally arranged guide wheels, and the bearings of the bending guide wheels 211 are connected to threaded rods 212. The diameter of the threaded rods 212 is the same as the diameter of the horizontally arranged circular through holes 210, and they are fixed to the guide wheel fixing brackets 207 by a pair of nuts 213. The position of the bending guide wheels 211 can be adjusted by adjusting the position of the threaded rods 212 in the horizontally arranged circular through holes 210. The curvature of the incoming reinforcing bars can be adjusted by adjusting the relative positions of the three or more guide wheels in the bending guide wheels 211. After undergoing one bending forming system, the reinforcing bars have been initially bent according to the set curvature and inclination angle. To ensure the bending effect, multiple additional bending forming devices should be arranged along the outer circumference of the newly added cross-section.

[0062] like Figure 1 , Figures 6-8 As shown, the main function of the spiral stirrup conveying system 3 is to deliver the bent spiral stirrups to the top of the bridge pier 402. It includes a matching circular sliding track 301, a second expansion bolt 302, a second slider 303, a ring rack 304, a gear 305, a second stepper motor 306, a second sliding track 307, a third slider 308, a ball screw 309, a lead screw 310, a third stepper motor 311, and a PLC control system 312.

[0063] The interlocking circular sliding track 301 is fixed to the cap beam 404 by the second expansion bolt 302. The curvature of the interlocking circular sliding track 301 is slightly greater than the curvature of the bent spiral stirrup, which can avoid conflict with the newly added longitudinal reinforcement 405 during the transmission and forming of the spiral stirrup.

[0064] A second slider 303 is placed on the interlocking circular sliding track 301, and an annular rack 304 is arranged along the outer circumference of the interlocking circular sliding track 301. A gear 305 is located on the upper part of the second slider 303, and the gear 305 meshes with the annular rack 304. The second slider 303 can slide on the interlocking circular sliding track 301 by driving the gear 305 with a second stepper motor 306. A second sliding track 307 is arranged below the second slider 303, and a third slider 308 is arranged on the second sliding track 307. One end of the third slider 308 is connected to a bent stirrup, and the other end is connected to a lead screw 309. The third stepper motor 311 controls the lead screw 310 to rotate, thereby driving the lead screw 309 to move vertically, thus controlling the movement of the third slider 308 on the second sliding track 307. The PLC control system controls the second stepper motor 306 and the third stepper motor 311, which in turn controls the second slider 303 to rotate around the circumference and the third slider 308 to lift, so that the formed spiral stirrups can be gradually conveyed to the top of the pier column.

[0065] The in-situ forming device for spiral stirrups of the present invention is implemented as follows:

[0066] Before winding the spiral stirrups, the surface of the existing reinforced concrete pier should be roughened and the new longitudinal reinforcement 405 should be installed. Then, the drive straightening system 1 is placed on the pier cap 403, the bending and forming system 2 is arranged along the perimeter of the new spiral stirrups on the pier cap 403, and the spiral stirrup conveying system 3 is fixed at the bottom of the pier cap beam 404.

[0067] Next, based on the relative positions of the drive straightening system 1 and the bending forming system 2, the guide column 105 and guide wheel 106 are adjusted so that the reinforcing bar can be delivered from the drive straightening system 1 to the bending forming system 2. The height of the first slider 204 in the bending forming system 2, the inclination angle of the guide wheel fixing frame 207, and the relative positions of the multiple sets of guide wheels in the bending guide wheel 211 are adjusted according to the spacing of the reinforcing spiral stirrups and the rotation radius of the spiral stirrups.

[0068] The reinforcing bars are then delivered to the drive straightening system 1. Driven by the first stepper motor 103, the reinforcing bars are straightened by the straightening feed wheel 102 and continue to be driven backward. The reinforcing bars pass through guide posts 105 and guide wheels 106 to be delivered to the bending and forming system 2. After passing through the first bending guide wheel 211, the reinforcing bars have undergone initial bending according to the set angle and curvature. At this point, manual delivery is required to sequentially deliver them to the subsequent three-dimensional guide wheels. After multiple bending and correction processes, the reinforcing bars meet the required spacing and curvature.

[0069] After the reinforcing bar passes through the bending and forming system 2, the end of the reinforcing bar is connected to the third slider 308 in the spiral stirrup conveying system 3. At this time, the spiral stirrup in-situ forming device can operate automatically. Under the control of the PLC control system, the spiral stirrup conveying system 3 controls the second slider 303 and the third slider 308 through the second stepper motor 306 and the third stepper motor 311 to guide the spiral stirrup upward.

[0070] After the spiral stirrups are wound, they can be connected to the newly added longitudinal reinforcement 405 by welding or binding. Then the spiral stirrup in-situ forming device can be removed to start the next round of spiral stirrup winding.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A device for in-situ forming of spiral stirrups, characterized in that, It includes a drive straightening system (1), a bending forming system (2), and a stirrup conveying system; The drive straightening system (1) includes a straightening unit, a guide column (105) and a guide wheel (106); the straightening unit is used to straighten the bent stirrups, the guide column (105) and the guide wheel (106) are set at the outlet end of the straightening unit, the guide column (105) is used to guide the straightened steel bars in the horizontal direction, and the guide wheel (106) is used to guide the straightened steel bars in the vertical direction; The bending forming system (2) is used to bend steel bars into spiral stirrups with specified spacing and curvature according to input parameters. It includes a guide rail bracket (201) and a bending guide wheel (211). The guide rail bracket (201) has several rods arranged along the outer circumference of the newly added section of the pier and is fixedly installed on the pier cap (403). A first sliding rail (203) is prefabricated on the guide rail bracket (201). A first slider (204) is installed on the first sliding rail (203). The bending guide wheel (211) is installed on the first slider (204) through the guide wheel fixing bracket (207). The reinforcing bars guided by the guide wheel (106) pass through the guide wheel (106) of the nearest guide rail bracket (201), and several guide rail brackets (201) are connected by the passing of the reinforcing bars; The spiral stirrup delivery system (3) is used to deliver the bent spiral stirrups to the top of the pier column; The guide wheel (106) is fixed on the first slider (204) by the guide wheel fixing bracket (207), and the first slider (204) has a circular threaded hole (206) arranged in annularly. The guide wheel fixing bracket (207) is L-shaped and has a circular through hole (208) arranged in a ring at the bottom. The circular through holes (208) arranged in an annular arrangement correspond to the circular threaded holes (206) arranged in an annular arrangement. When the guide wheel fixing bracket (207) rotates to the set tilt angle, the guide wheel fixing bracket (207) is fixedly connected to the first slider (204) by bolts. The guide wheel fixing bracket (207) has a horizontally arranged circular through hole (210) on the upper part. A threaded rod (212) is installed in the horizontally arranged circular through hole (210). The curved guide wheel (211) consists of multiple horizontally arranged guide wheels (106). The curved guide wheel (211) is connected to the threaded rod (212). The position of the bending guide wheel (211) can be adjusted by adjusting the position of the threaded rod (212) in the horizontally arranged circular through hole (210); the curvature of the inserted reinforcing bar can be adjusted by adjusting the relative position of the guide wheel (106); The spiral stirrup conveying system (3) includes a pair of circular sliding rails (301), a second sliding rail (307), a lead screw, and a PLC control system (312). The matching circular sliding track (301) is fixed on the cap beam (404); A second slider (303) is placed on the paired circular sliding track (301), and an annular rack (304) is arranged along the outer circumference of the paired circular sliding track (301); a gear (305) is provided on the upper part of the second slider (303), and the gear (305) meshes with the annular rack (304); the gear (305) is connected to a second stepper motor (306) for driving the second slider (303) to slide on the paired circular sliding track (301); The second sliding track (307) is arranged below the second slider (303), and the third slider (308) is arranged on the second sliding track (307); one end of the third slider (308) is connected to the bent stirrup, and the other end is connected to the screw rod; The lead screw is connected to a third stepper motor (311) to drive the lead screw to move vertically, thereby controlling the displacement of the third slider (308) on the second sliding track (307); The PLC control system (312) is connected to the second stepper motor (306) and the third stepper motor (311) to control the second slider (303) to rotate around the circumference and the third slider (308) to lift, so as to gradually convey the formed spiral stirrups to the top of the pier column.

2. The in-situ forming device for spiral stirrups according to claim 1, characterized in that, The drive straightening system (1) is installed on the bridge abutment (403). The drive straightening system (1) includes a first stepper motor (103) and a straightening feed wheel (102). The straightening feed wheel (102) has several pairs arranged horizontally in sequence. There is a gap in the middle of each pair of straightening feed wheels (102) for passing through the reinforcing bar. The straightening feed wheel (102) is installed inside the rectangular frame (101). The two ends of the rectangular frame (101) are connected to the rotating shaft (104). One end of the rotating shaft (104) is electrically connected to the first servo motor, which is used to drive the rotating shaft (104) to rotate.

3. The in-situ forming device for spiral stirrups according to claim 1, characterized in that, The curvature of the paired circular sliding track (301) is greater than the curvature of the bent spiral stirrup.

4. The in-situ forming device for spiral stirrups according to claim 1, characterized in that, The circular sliding track (301) consists of two semicircular tracks, which are fixed to the cap beam (404) by the second expansion bolt (302).

5. The in-situ forming device for spiral stirrups according to claim 1, characterized in that, A limiting block (205) is also installed on the guide rail bracket (201). After the position of the first slider (204) on the first sliding rail (203) is adjusted, the limiting block (205) is used to fix the position of the first slider (204).

6. The in-situ forming device for spiral stirrups according to claim 1, characterized in that, The guide rail bracket (201) is fixed to the support plate (403) by the first expansion bolt (202).

7. The working method of the in-situ forming device for spiral stirrups according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Place a drive straightening system (1) on the pier cap (403), arrange a bending forming system (2) along the perimeter of the newly added spiral stirrups on the pier cap (403), and fix a spiral stirrup conveying system (3) at the bottom of the pier cap beam (404). S2. Adjust the positions of the guide post (105) and the guide wheel (106) according to the relative positions of the drive straightening system (1) and the bending forming system (2); The height of the first slider (204), the tilt angle of the guide wheel (106), and the relative position of the bending guide wheel (211) in the bending forming system (2) are adjusted according to the spacing of the reinforcing spiral hoops, the rotation radius of the spiral hoops. S3. The steel bar is then delivered to the drive straightening system (1). After straightening, the steel bar passes through the guide column (105) and guide wheel (106) to be delivered to the bending forming system (2). After passing through the first bending guide wheel (211), the steel bar has been initially bent according to the set angle and curvature. At this time, it is delivered to the next few three-dimensional guide wheels (106) by manual means. After multiple bending and correction, the steel bar meets the required spacing and curvature. After the reinforcing bar passes through the bending and forming system (2), the end of the reinforcing bar is connected to the spiral stirrup conveying system (3). At this time, the spiral stirrup conveying system (3) is operated to guide the spiral stirrup to be delivered upward.

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