Large-diameter arc-shaped steel bar bending tool and method

Abstract

The invention discloses a diameter arc-shaped steel bar bending tool which comprises a base steel plate and a bending structure. The base steel plate is supported on a working surface; the bending structure is installed on the base steel plate, a plurality of bending units are arranged in the bending structure, and the bending units are arranged on one side of the base steel plate at intervals; a single section of bent reinforcing steel bar is divided into a plurality of bending areas, one end of each bending unit is installed on a base steel plate, the other end of each bending unit is connected to a certain bending area of the reinforcing steel bar, and the distance between the bending areas and the edge of the base steel plate is adjusted through the bending units. The reinforcing steel bar is divided into multiple sections, and all the sections of the reinforcing steel bar are bent in sequence through the device; in the bending process, a single section of bent steel bar is divided into a plurality of bending areas, and each bending area corresponds to one bending unit; the reinforcing steel bars are connected to the ends of the bending units, the lengths of the different bending units are adjusted, so that the connecting lines between the end points of the bending units conform to the curve of the section, to be bent, of the reinforcing steel bars, and therefore the purpose of rapidly bending the reinforcing steel bars is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a large-diameter arc-shaped reinforcing bar bending tool and method. BACKGROUND

[0002] As a core special-shaped component in modern buildings and bridge engineering, the arc-shaped beam is widely used in large-span domes, curved bridges, hospitals, shopping malls and other scenes, and its reinforcing bar is the main stress material. Therefore, the processing and installation quality of the arc-shaped beam reinforcing bar is an important process of the stress of the arc-shaped beam, and is also the top priority of structural safety.

[0003] The existing arc-shaped reinforcing bar bending method mainly falls into two categories. One is that the operator bends on site by manpower with the help of a steel pipe or a hand-held bending machine, but the arc control precision is poor, often causing internal lateral bending stress of the reinforcing bar or insufficient thickness of the beam side protective layer, affecting the safety of the mechanism. The other is to bend in the reinforcing bar processing shed and install on site, but for large-span arc-shaped beams, reinforcing bar joints are unavoidable. Mechanical connection after reinforcing bar bending will cause the connected reinforcing bar not to be in the same plane, or the joint connection quality is unqualified, which seriously affects the stress of the arc-shaped beam and greatly affects the safety of the structure. SUMMARY

[0004] In view of the above defects in the prior art, a large-diameter arc-shaped reinforcing bar bending tool and method are provided, which realizes the on-site bending function of large-diameter arc-shaped reinforcing bars, improves the quality of on-site bending of large-diameter reinforcing bars, and ensures the rationality of the stress of the arc-shaped component reinforcing bar.

[0005] The technical solution adopted by the present application to solve the above technical problems is: In a first aspect, a large-diameter arc-shaped reinforcing bar bending tool includes a base steel plate and a bending structure. The base steel plate is supported on the working surface. The bending structure is installed on the base steel plate, and a plurality of bending units are provided in the bending structure. The bending units are arranged at intervals on one side of the base steel plate. A single segment of reinforcing bar is divided into a plurality of bending zones. One end of each bending unit is installed on the base steel plate, and the other end is connected to a bending zone of the reinforcing bar. The spacing between the bending zone and the edge of the base steel plate is adjusted by the bending unit.

[0006] According to the above technical solution, the bending structure further includes a curved scale disc, which is horizontally fixed on the base steel plate. The horizontal scale disc includes an X-axis and a Y-axis. The bending unit comprises a threaded sleeve, a lever arm, a first roller assembly, and a steel wire rope assembly; the threaded sleeve is fixed on the base steel plate, the threaded sleeve is located on the side wall of the curved scale dial, and the threaded sleeve is perpendicular to the X axis of the scale dial; the lever arm is threadedly connected in the threaded sleeve, the first roller assembly is installed at the end of the lever arm away from the curved scale dial, the first roller assembly is provided with a first roller with a groove, the first roller of each bending unit is located on a certain bending area, and the other end of the lever arm is cantilevered below the curved scale dial; one end of the steel wire rope assembly is fixed on the base steel plate, and the other end is fixedly connected to the bending area of the steel wire rope. The rotation of the lever arms is sequentially connected to the curved lines on the curved scale dial, and the curved lines are the bending radii of the steel bars.

[0007] According to the technical scheme, the steel wire rope assembly comprises an electric hoist fixed on the base steel plate, a guide wheel installed on the base steel plate, a first fixed lock fixed on the steel bar, and a steel wire rope connected between the first fixed lock and the electric hoist.

[0008] According to the technical scheme, the bending assembly comprises a hydraulic machine installed on the base steel plate, a plurality of parallel arranged hydraulic lever arms, a hydraulic pipeline connected between the hydraulic lever arms, and a second roller assembly installed at the outer end of the hydraulic lever arm; the inner end of the hydraulic lever arm is fixed on the base steel plate, the second roller assembly comprises two vertically arranged second rollers with grooves, and the steel bar is located between the grooves of the two second rollers.

[0009] According to the technical scheme, the two second rollers of the second roller assembly are in a detachable form, and different specifications of the second rollers are installed according to the diameter of the steel bar.

[0010] According to the technical scheme, the fixed arm and the second fixed lock are further included, one end of the fixed wall is fixed on the base steel plate, and the other end of the fixed arm is fixedly connected with the second fixed lock.

[0011] According to the technical scheme, safety protection assemblies are arranged at both ends of the bending structure, the safety protection assembly comprises a vertical fixed pin, a locking ring sleeved on the fixed pin, a third fixed lock fixedly connected to the steel bar, and a safety steel wire rope connected between the third fixed lock and the locking ring; a plurality of limiting plates are vertically and spaced apart on the side of the fixed pin away from the steel bar, and the limiting plates are obliquely arranged; the size of the locking ring is larger than the size of the sum of the fixed pin and the limiting plate, and the locking ring in the tension state is clamped between the limiting plate and the fixed pin.

[0012] According to the technical scheme, two horizontal beams are arranged on the base steel plate, one horizontal beam is located above the other horizontal beam, and a gap is left between the two horizontal beams; the threaded sleeve or the hydraulic lever arm is fixed between the two horizontal beams. The base steel plate is provided with rolling wheels at the bottom, and the rolling wheels are matched with guide rails on the working surface.

[0013] In a second aspect, a method for bending a large-diameter arc-shaped reinforcing bar using the large-diameter arc-shaped reinforcing bar bending tool as described above, the method comprising The reinforcing bar is segmented, and each segment of the reinforcing bar is bent by the large-diameter arc-shaped reinforcing bar bending tool.

[0014] According to the technical scheme, in the bending structure comprising the curved scale disc, the position of the lever arm is adjusted according to the curved scale disc, and then the reinforcing bar is tightly fitted into the first roller groove at the end of the lever arm by using the steel wire rope assembly. In the bending structure comprising the hydraulic lever arm, the reinforcing bar is placed between the two second rollers at the end of the hydraulic lever arm, and then the length of the hydraulic lever arm is adjusted according to the designed bending size of the reinforcing bar.

[0015] The present application has the following beneficial effects: 1. The reinforcing bar is segmented, and each segment of the reinforcing bar is bent by the device. During the bending process of a specific segment of the reinforcing bar, the single-bent reinforcing bar is divided into multiple bending zones, and each bending zone corresponds to a bending unit. The reinforcing bar is connected to the end of the bending unit, and the length of different bending units is adjusted to make the connecting line between the end points of the bending units conform to the curve of the segment to be bent, thereby achieving the purpose of quickly bending the reinforcing bar.

[0016] 2. The bending unit is provided in two forms to meet different use scenarios and improve the use diversity of the device.

[0017] 3. The fixed arm and the second fixed lock are provided. Before bending a segment of the reinforcing bar, the segment of the reinforcing bar is fixed by the second fixed lock to facilitate the subsequent bending process and improve the bending efficiency. In addition, safety protection assemblies are provided at both ends of the bending structure to avoid safety hazards caused by the rebound of the reinforcing bar when the bending assembly fails, thereby improving the safety of the device.

[0018] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application and to implement the content of the description, the preferred embodiments of the present application are described in detail below with reference to the accompanying drawings. The specific embodiments of the present application are described in detail by the following examples and their accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application.

[0020] Figure 1is a top view of a first embodiment provided by the present invention; Figure 2 It is a side view of a first embodiment of the present invention; Figure 3 yes Figure 1 Cross-sectional view of aa in the figure; Figure 4 is an enlarged side view of the end of the lever arm of the first embodiment provided by the present invention; Figure 5 This is an enlarged view of the fixing bolt of the embodiment provided by the present invention; Figure 6 is a top view of a second embodiment provided by the present invention; Figure 7 is an enlarged side view of the end of a lever arm according to a second embodiment of the present invention; In the figure, 1. base steel plate; 2. working surface; 2-1. equipment fixing plate; 3. curve scale plate; 4. threaded sleeve; 5. lever arm; 6. first roller assembly; 6-1. first roller; 6-2. bolt; 7. wire rope assembly; 7-1. electric hoist; 7-2. guide wheel; 7-3. first fixed lock; 7-4. wire rope; 8. hydraulic press; 9. hydraulic lever arm; 10. hydraulic pipeline; 11. second roller assembly; 11-1. second roller; 12. fixed arm; 13. second fixed lock; 14. safety protection assembly; 14-1. fixing bolt; 14-1-1. limit plate; 14-2. locking ring; 14-3. third fixed lock; 14-4. safety wire rope; 15. crossbeam; 16. rolling wheel; 17. guide rail; 18. operation box; 20. intelligent control panel; 21. steel bar. DETAILED DESCRIPTION

[0021] The following is combined with Figures 1-7 The principles and features of the present invention are described, and the examples given are only for the purpose of explaining the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are in a very simplified form and are not in exact proportions, and are only used for the purpose of conveniently and clearly assisting in illustrating the embodiments of the present invention.

[0022] It should be understood that when a component is referred to as being "on" another component, it can be directly on the other component or intervening components can also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component, or intervening components can be present. When a component is referred to as being "disposed on" another component, it can be directly disposed on the other component, or intervening components can be present. The terms "vertical", "horizontal", "left", "right", and similar terms as used herein are for purposes of description only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] Reference Figures 1-7 As shown in the drawings, the present application provides a large-diameter arc-shaped reinforcing bar bending tool.

[0025] The bending structure is installed on the base steel plate, and a plurality of bending units are arranged in the bending structure, and the bending units are arranged at intervals on one side of the base steel plate; the length of the single segment of the reinforcing bar 21 is divided into a plurality of bending zones, one end of each bending unit is installed on the base steel plate, and the other end is connected to a certain bending zone of the reinforcing bar, and the spacing between the bending zone and the edge of the base steel plate is adjusted by the bending unit. The base steel plate is supported on the working surface 2. The bending structure is installed on the base steel plate, and a plurality of bending units are arranged in the bending structure, and the bending units are arranged at intervals on one side of the base steel plate; the length of the single segment of the reinforcing bar 21 is divided into a plurality of bending zones, one end of each bending unit is installed on the base steel plate, and the other end is connected to a certain bending zone of the reinforcing bar, and the spacing between the bending zone and the edge of the base steel plate is adjusted by the bending unit.

[0026] In this application, the reinforcing bar is divided into multiple segments, and each segment of the reinforcing bar is bent in turn by the device; during the bending of a specific segment of the reinforcing bar, the single segment of the reinforcing bar is divided into a plurality of bending zones, and each bending zone corresponds to a bending unit; the reinforcing bar is connected to the end of the bending unit, and the length of different bending units is adjusted to make the connecting line between the end points of the bending units conform to the curve of the segment of the reinforcing bar to be bent, thereby achieving the purpose of quickly bending the reinforcing bar.

[0027] Embodiment 1 Based on the above structure, two structure forms of the bending structure are given: The first kind, the structure form of the first preferred bending unit is given, the bending structure further includes a curve scale disc 3, which is horizontally fixed on the base steel plate; the horizontal scale disc includes X-axis and Y-axis; The bending unit comprises a threaded sleeve 4, a lever arm 5, a first roller assembly 6, and a steel wire rope assembly 7. The threaded sleeve is directly or indirectly fixed on the base steel plate, is located on the side wall of the curved scale dial, and is perpendicular to the X axis of the scale dial. The lever arm is threadedly connected in the threaded sleeve and can extend out of the threaded sleeve at both ends. The first roller assembly is installed at the end of the lever arm away from the curved scale dial, and the first roller assembly is provided with a first roller 6-1 with a groove. The first roller of each bending unit is located on a bending area. The other end of the lever arm overhangs the area below the curved scale dial. One end of the steel wire rope assembly is fixed on the base steel plate, and the other end is fixedly connected to the bending area of the steel wire rope. When the lever arm is rotated, the curves of the ends of all the lever arms connected in sequence on the curved scale dial are the bending radii of the steel bars. The first roller is connected to the end of the lever arm through a peg 6-2 to ensure that the roller can freely roll. After the bending curve of the steel bar is drawn on the curved scale dial, the inner short end of the lever arm is rotated to be directly below the drawn curve, and the connection between the other ends of all the lever arms is the bending curve of the steel bar.

[0028] Preferably, the steel wire rope assembly comprises an electric hoist 7-1 fixed on the base steel plate, a guide wheel 7-2 installed on the base steel plate, a first fixed lock 7-3 fixed on the steel bar, and a steel wire rope 7-4 connected between the first fixed lock and the electric hoist.

[0029] Secondly, the structure of the second preferred bending unit is given. The bending assembly comprises a hydraulic machine 8 installed on the base steel plate, a plurality of parallel hydraulic lever arms 9, a hydraulic pipeline 10 connected between the hydraulic lever arms, and a second roller assembly 11 installed on the outer ends of the hydraulic lever arms. The inner ends of the hydraulic lever arms are fixed on the base steel plate. The second roller assembly comprises two vertically arranged second rollers 11-1 with grooves, and the steel bar is located between the grooves of the two second rollers.

[0030] Preferably, the two rollers of the second roller assembly are in a detachable form, and rollers of different specifications are installed according to the diameter of the steel bar.

[0031] Example 2 In order to avoid the steel bar from moving and improve the quality and efficiency of the steel bar bending, a fixed arm 12 and a second fixed lock 13 are further included. One end of the fixed arm is fixed on the base steel plate, and the other end of the fixed arm is fixedly connected with the second fixed lock.

[0032] Example 3 In order to avoid the bending assembly failure, the steel bar rebounding causes the security risk; the safety protection assembly 14 is arranged at both ends of the bending structure, the safety protection assembly includes the vertical fixed bolt 14-1, the locking ring 14-2 sleeved on the fixed bolt, the third fixed lock 14-3 fixedly connected on the steel bar, and the safety steel wire rope 14-4 connected between the third fixed lock and the locking ring; a plurality of limiting plates 14-1-1 are vertically and spaced apart on the side of the fixed bolt away from the steel bar, and the limiting plates are arranged obliquely; the size of the locking ring is greater than the size of the sum of the fixed bolt and the limiting plate, and the locking ring in the tension state is clamped between the limiting plate and the fixed bolt.

[0033] In the embodiments 1-3, preferably, two horizontal beams 15 are arranged on the base steel plate, one beam is located above the other beam, and a gap is left between the two beams; the threaded sleeve or the hydraulic lever arm is fixed between the two beams; Optionally, the rolling wheel 16 is arranged at the bottom of the base steel plate, and the guide rail 17 matched with the rolling wheel is arranged on the working surface.

[0034] In the above structure, the first fixed lock, the second fixed lock and the third fixed lock have the same structure, and the existing structure is adopted. In order to ensure the clamping of the steel bar, the anti-skid clamping piece is arranged in the fixed lock.

[0035] In the device adopting the first bending structure, as shown in the drawing, Figures 1-5 firstly, the rolling wheel is welded on the bottom surface of the base steel plate, the operation box body 18 is welded on the upper part of the steel plate, the fixed bolt is welded on the two sides of the base steel plate, two beams are welded on the front end of the operation box body, the equipment fixing plate 2-1 is welded in the operation box body (the above components are indirectly fixed on the base steel plate through the welding on the equipment fixing plate, and can also be directly fixed on the base steel plate), the fixed arm is welded on one side edge of the operation box body, the electric hoist bolt is fixed on the equipment fixing plate, the steel wire rope of the electric hoist is wound on the guide wheel and extends out of the operation box body (the traction rope in the middle part can extend out through the gap between the two beams), the first fixed lock is hinged on the steel wire rope, and the threaded sleeve is welded and fixed between the two beams. The lever arm connected with the first rolling wheel is screwed into the threaded sleeve, and the assembly of the device is completed.

[0036] Before using the device, first lay a plurality of guide rails on the working surface, so that the rolling wheels of the device are clamped on the guide rails. The reinforcement is placed vertically to the lever arm, and the first and second fixed locks are fixed on the reinforcement segment to be bent. Draw the bending segment arc of the reinforcement on the curve scale disc, and screw the lever arm into the threaded sleeve until the lower end is on the drawn bending segment arc. Fix the third fixed lock of the safety protection assembly on both ends of the reinforcement segment to be bent, and put the locking ring on the fixed pin. Then start the electric hoist, press the reinforcement into the groove of the first roller, and keep it for a period of time, thereby completing the bending operation of the reinforcement segment.

[0037] In the device using the second bending structure, as shown in Figures 5-7 , compared with the device using the first bending structure, the threaded sleeve and the lever arm are replaced by a hydraulic lever arm fixed on the cross beam. The hydraulic pipeline is connected with the hydraulic lever arm and the hydraulic machine. The hydraulic machine is fixed on the base plate by bolts. The original first roller assembly is replaced by a second roller assembly, both of which can be detached, facilitating the replacement of the second roller due to different diameters of the reinforcement. An intelligent control board 20 is added, which is connected with the hydraulic machine and adjusts the hydraulic drive of the hydraulic lever arm through the data terminal. The rest is the same as the device using the first bending structure, thereby completing the assembly of the expansion or improvement scheme.

[0038] When using the expansion or improvement scheme, first select the specification of the second roller according to the reinforcement specification, and adjust the hydraulic lever to the same length. Please refer to Figure 6 , first install the second roller on the inside, place the reinforcement in the groove of the second roller, and then install the second roller on the outside, so that the reinforcement is fixed between the grooves of the two second rollers. Install the safety protection assembly. Input the arc parameters into the intelligent control board through the drawing arc and the segment, and start the hydraulic device to complete the installation and use. Through the hydraulic system and the intelligent control system, the efficiency and accuracy of the reinforcement bending can be further improved, and the reinforcement rebound parameter can be set to effectively avoid the rebound of the reinforcement after bending. By adjusting the length of the hydraulic lever arm in the same reinforcement bending area, reinforcement with different radii can be bent at the same time.

[0039] The present application also provides a large-diameter arc-shaped reinforcement bending method using the above-mentioned large-diameter arc-shaped reinforcement bending tool.

[0040] In the bending structure comprising a curve scale disc, the method comprises: Step 1: complete the construction of the working surface of the external arc-shaped member through the design drawing.

[0041] Step 2: cut the reinforcement at the arc-shaped part according to the drawing calculation. The reinforcement of the large-span member can be mechanically connected on the working surface first, and attention should be paid to avoid placing the connection part in the area with too large bending radius.

[0042] Step 3: Lay two parallel guide rails on the working surface, and make the guide rails parallel to the steel bars to be bent. Hoist the device of the application on the laid guide rails by hoisting equipment, and make the device of the application smoothly slide on the guide rails through the rolling wheels, and make one end of the lever arm face the steel bars to be bent.

[0043] Step 4: According to the drawing, the steel bars are segmented according to the bending length that the equipment can bend at one time, and each segment of the steel bars is bent from one side to the other side by the device in sequence. Before bending each segment of the steel bars, the curvature of the steel bars to be bent is drawn on the curve scale disc.

[0044] Step 5: Connect the second fixed lock on the fixed arm to the end of the single-segment bending area of the steel bar to achieve preliminary fixation of the steel bar.

[0045] Step 6: Rotate the lever arm and adjust the lever arm one by one so that the end of the lever arm is located on the curve drawn on the curve scale disc. In order to ensure that the groove of the first roller is in a horizontal position after the lever arm is adjusted in place, the pitch of the thread in the thread design of the lever arm and the threaded sleeve is within the error allowable range. Therefore, when the top roller is not parallel to the steel bar, the lever arm adjustment roller can be continued to be screwed in to adjust the roller to be horizontal.

[0046] Step 7: Divide the single-segment bending area of the steel bar into multiple bending zones, and each bending zone corresponds to a wire rope assembly; the first fixed lock in the wire rope assembly is fixedly connected to each bending zone, and the electric hoist in the wire rope assembly is started to make the wire rope tight and then the electric hoist is closed.

[0047] Step 8: Install the third fixed lock at both ends of the single-segment bending area of the steel bar, and tighten the safety wire rope. (Note: After the bending is started, the locking ring on the fixed bolt can slide down to the next layer of the limiting plate and the clamping groove formed by the fixed bolt along with the relaxation of the safety wire rope, to ensure that the safety protection chain is always in a tight state).

[0048] Step 9: Start the electric hoist to begin bending the steel bar, and after the steel bar is tightly fitted in all the grooves of the first roller, hold for 5-10 minutes before unloading.

[0049] Step 10: Remove the first fixed lock and the third fixed lock step by step, in sequence from one side to the other side of the steel bar with large bending amount. Then remove the second fixed lock, move the device to the bending area of the next segment of the steel bar, and continue to repeat steps 4-10. The bending of the large-diameter and large-span arc-shaped steel bar can be completed.

[0050] In the bending structure comprising a hydraulic lever arm, the method comprises: Steps 1~3: Same as steps 1~3 of the bending structure comprising a curved scale dial.

[0051] Step 4: Retract all the hydraulic lever arms to the original position, segment the arc-shaped steel bar according to the equipment bending length according to the drawing, and simultaneously input the arc-shaped parameters and the rebound parameters into the external intelligent control board in sequence. The control board can display the elongation of each hydraulic lever arm in each segment.

[0052] Step 5: Connect the second fixed lock on the fixed arm to the end of the single-segment bending area of the steel bar to achieve preliminary fixation of the steel bar.

[0053] Step 6: Install the second roller assembly at the end of the hydraulic lever arm from the side close to the fixed wall in sequence. During the installation of a certain hydraulic lever arm, select the specifications of the second rollers at the end of the hydraulic lever arm according to the size of the steel bar; first install the inner second roller, then install the outer second roller after placing the steel bar to be bent into the groove of the second roller, and fix the second roller and the hydraulic lever arm firmly. The groove between the inner and outer second rollers is used to limit the steel bar.

[0054] Step 7: Install the third fixed lock at both ends of the single-segment bending area of the steel bar, and tighten the safety steel wire rope. (Note: After the bending is started, the locking ring on the fixed bolt can slide down to the clamping groove formed by the next layer of limiting plate and the fixed bolt along with the relaxation of the safety steel wire rope, ensuring that the safety protection chain is always in a tightened state).

[0055] Step 8: Start the hydraulic machine and slowly bend from the side with small bending amount to the side with large bending amount step by step through the intelligent control board.

[0056] Step 9: When all the hydraulic lever arms are extended to the set value, measure the extension length of the hydraulic lever arms with a ruler and compare it with the data of the intelligent control board. If they are consistent, hold the load for 5-10 minutes, then start unloading, and unload from the side with large bending amount to the other side.

[0057] Step 10: Remove the second roller at the end of the hydraulic lever arm on the outer side and the third fixed lock of the safety steel protection assembly. Then remove the second fixed lock, move the device to the bending area of the next segment of the steel bar, and continue to repeat steps 4~10. The bending of the large-diameter and large-span arc-shaped steel bar can be completed. (Note: When removing the safety protection chain, observe whether the protection chain is in a tightened state) The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form; any person skilled in the art can easily implement the present application according to the drawings and the above description; however, any person skilled in the art can make some changes, modifications and equivalent changes of the above disclosed technical contents without departing from the technical solution of the present application, and the equivalent embodiments of the present application are still within the protection scope of the present application.

Claims

1. Large diameter arc steel bar bending tool, characterized by: Including base steel plate and curved structure; The base steel plate is supported on the working surface; The bending structure is installed on the base steel plate. Several bending units are provided in the bending structure. The bending units are arranged at intervals on one side of the base steel plate. The single section of bent steel bar is divided into multiple bending areas. One end of each bending unit is installed on the base steel plate, and the other end is connected to a bending area of ​​the steel bar. The bending unit adjusts the distance between the bending area and the edge of the base steel plate.

2. The large-diameter arc-shaped steel bar bending tool according to claim 1, characterized in that: The curved structure also includes a curved scale plate, which is horizontally fixed on the base steel plate; the horizontal scale plate includes an X-axis and a Y-axis; The bending unit includes a threaded sleeve, a lever arm, a first roller assembly, and a wire rope assembly; the threaded sleeve is fixed to the base steel plate, the threaded sleeve is located on the side wall of the curve scale, and the threaded sleeve is perpendicular to the X-axis of the scale; the lever arm is threadedly connected to the threaded sleeve, the first roller assembly is installed at the end of the lever arm away from the curve scale, and the first roller assembly is provided with a first roller with a groove. The first roller of each bending unit is placed on a certain bending area, and the other end of the lever arm is cantilevered in the area below the curve scale; one end of the wire rope assembly is fixed to the base steel plate, and the other end is fixedly connected to the bending area of ​​the wire rope; Rotate the lever arm, and the curves connected in sequence at the ends of all the lever arms on the curve scale are the bending arcs of the steel bars.

3. The large-diameter arc-shaped steel bar bending tool according to claim 2, characterized in that: The wire rope assembly includes an electric hoist fixed on a base steel plate, a guide wheel installed on the base steel plate, a first fixing lock fixed on a steel bar, and a wire rope connected between the first fixing lock and the electric hoist.

4. The large-diameter arc-shaped steel bar bending tool according to claim 1, characterized in that: The bending assembly includes a hydraulic press installed on a base steel plate, several hydraulic lever arms arranged in parallel, hydraulic pipelines connected between the hydraulic lever arms, and a second roller assembly installed on the outer end of the hydraulic lever arm; the inner end of the hydraulic lever arm is fixed to the base steel plate, and the second roller assembly includes two second rollers with grooves arranged vertically with the rotation center line, and the steel bar is located between the grooves of the two second rollers.

5. The large-diameter arc-shaped steel bar bending tool according to claim 4, characterized in that: The two second rollers of the second roller assembly are both detachable, and second rollers of different specifications are installed according to the diameter of the steel bars.

6. The large-diameter arc-shaped steel bar bending tool according to any one of claims 1 to 4, characterized in that: It also includes a fixed arm and a second fixed lock. One end of the fixed wall is fixed to the base steel plate, and the other end of the fixed arm is fixedly connected to the second fixed lock.

7. The large-diameter arc-shaped steel bar bending tool according to any one of claims 1 to 4, characterized in that: Safety protection components are provided at both ends of the bent structure, and the safety protection components include a vertically arranged fixing bolt, a locking ring mounted on the fixing bolt, a third fixing lock fixedly connected to the steel bar, and a safety wire rope connected between the third fixing lock and the locking ring; a number of limit plates are vertically spaced apart on the side of the fixing bolt away from the steel bar, and the limit plates are arranged obliquely; the size of the locking ring is larger than the sum of the sizes of the fixing bolt and the limit plate, and the locking ring in a tensile state is stuck between the limit plate and the fixing bolt.

8. The large-diameter arc-shaped steel bar bending tool according to claim 2 or 4, characterized in that: Two horizontal beams are provided on the base steel plate, one beam being positioned above the other with a gap between them; a threaded sleeve or a hydraulic lever arm is fixed between the two beams; A rolling wheel is provided at the bottom of the base steel plate, and a guide rail matching the rolling wheel is provided on the working surface.

9. A method for bending large-diameter curved steel bars, characterized in that: Using the large diameter arc steel bar bending tool as described in any one of claims 1 to 8, the method includes: The steel bars are divided into sections, and each section is bent one by one using a large-diameter arc-shaped steel bar bending tool.

10. The method for bending large-diameter arc-shaped steel bars according to claim 9, characterized in that: In a bending structure including a curve scale, the position of the lever arm is adjusted according to the curve scale, and then the steel bar is tightened and fitted into the first roller groove at the end of the lever arm using a wire rope assembly; In the bending structure including the hydraulic lever arm, the steel bar is placed between two second rollers at the end of the hydraulic lever arm, and then the length of the hydraulic lever arm is adjusted according to the designed bending size of the steel bar.

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