Bridge arc-shaped steel form flatness detection device and detection method

Abstract

The application relates to the field of detection, in particular to a bridge arc-shaped steel formwork flatness detection device and a detection method. The device comprises a positioning frame for supporting and positioning a steel formwork, and further comprises a detection frame for fixing a detection mechanism. The detection mechanism comprises a group of linear telescopic units. One end of the linear telescopic unit is rotationally matched with the detection frame, and the rotation axis is parallel to the axis of the steel formwork. The other end of the linear telescopic unit is fixed with a laser detection module. The laser detection module comprises a mounting frame arranged along the parallel steel formwork axis direction for fixing a laser flatness measuring instrument. The mounting frame is rotationally matched with the linear telescopic unit, and the rotation axis is parallel to the axis of the steel formwork. The linear telescopic unit and the mounting frame are driven by independent power sources and rotate around the respective rotation axes. The application can realize rapid detection of the flatness of the arc-shaped steel formwork, and the detection precision is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of detection, and particularly relates to a bridge arc-shaped steel formwork flatness detection device and a detection method. BACKGROUND

[0002] In the process of bridge engineering construction, the arc-shaped steel formwork is a key forming tool for shaping the curved surface structure such as arch ring and bridge tower, and the flatness of the working surface thereof directly determines the geometric precision and surface quality of the final concrete member. Once the flatness of the arc-shaped steel formwork is not up to standard, the curved surface structure poured will appear twisted deformation or stress concentration, which not only seriously affects the overall linear beauty and stress performance of the bridge, but also buries the structure safety hidden danger and reduces the service life of the bridge. Therefore, the flatness detection of the arc-shaped bridge steel formwork is a necessary link to ensure the safety and reliability of the bridge structure and the quality standard.

[0003] However, the structure for detecting the flatness of the steel formwork as described in the prior art such as CN117553712B is mainly limited to the detection of the flat steel formwork. After the laser detection mechanism and the steel formwork are adjusted to a set distance, the flatness of the steel formwork is judged by laser scanning of the laser detection mechanism. However, due to the arc surface of the arc-shaped steel formwork, the curvature radius of different steel formworks is different, and the existing flat detection mechanism cannot adapt to the arc surface of the steel formwork for detection. Even if a set of swing mechanism is added to swing the laser detection mechanism, it cannot always maintain the set distance and set angle between the laser detection mechanism and the steel formwork, which will cause detection errors. Therefore, it is urgent to solve the problem. SUMMARY

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present application provides a bridge arc-shaped steel formwork flatness detection device and a detection method. The present application can realize rapid detection of the flatness of the arc-shaped steel formwork surface, and has high detection precision.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A bridge arc-shaped steel formwork flatness detection device, comprising a positioning frame for supporting and positioning the steel formwork, and a detection frame for fixing a detection mechanism, the detection mechanism comprising a set of linear extension units, one end of the linear extension unit being in rotary cooperation with the detection frame, the rotary axis being parallel to the axis of the steel formwork; the other end of the linear extension unit being fixed with a laser detection module; the laser detection module comprising a mounting frame arranged along the direction parallel to the axis of the steel formwork and used for fixing a laser flatness measuring instrument, the mounting frame being in rotary cooperation with the linear extension unit, the rotary axis being parallel to the axis of the steel formwork, the linear extension unit and the mounting frame being driven by independent power sources to rotate around their respective rotary axes.

[0007] As a further scheme of the present application: the linear telescopic unit comprises a swing sleeve and a swing inserting rod coaxially arranged with the swing sleeve and in telescopic sliding cooperation; the swing sleeve and the swing inserting rod are driven by a first telescopic cylinder to generate linear telescopic action.

[0008] As a further scheme of the present application: the mounting frame is connected with the swing inserting rod through a first worm shaft to form rotary cooperation, the first worm shaft and the axis of the steel formwork are parallel to each other, the power source of the mounting frame is a first driving motor fixed on the swing inserting rod, a first worm is coaxially fixed on the motor shaft of the first driving motor, a first worm wheel is coaxially fixed on the first worm shaft, and the first worm and the first worm wheel constitute worm and gear cooperation to drive the mounting frame to rotate around the axis of the first worm shaft.

[0009] As a further scheme of the present application: a laser flatness measuring instrument is installed on the mounting frame at equal intervals along the length direction, and a laser displacement sensor for measuring the distance between the laser flatness measuring instrument and the mold surface of the steel formwork is also fixed on the mounting frame.

[0010] As a further scheme of the present application: the power source of the linear telescopic unit is a second driving motor fixed on the detection frame, the swing sleeve and the detection frame are connected through a second worm shaft to form rotary cooperation, the second worm shaft and the axis of the steel formwork are parallel to each other, a second worm is coaxially fixed on the motor shaft of the second driving motor, a second worm wheel is coaxially fixed on the second worm shaft, and the second worm and the second worm wheel constitute worm and gear cooperation to drive the swing sleeve to rotate around the axis of the second worm shaft.

[0011] As a further scheme of the present application: the steel formwork is fixed on the positioning frame with the opening upward, the detection frame is in a gantry structure with a width greater than the width of the steel formwork, a conveying belt for linearly conveying the positioning frame is arranged below the detection frame, and the conveying direction of the conveying belt and the axis of the steel formwork are parallel to each other.

[0012] As a further scheme of the present application: the positioning frame comprises two groups of main support frames arranged in parallel and with adjustable spacing, a support seat for supporting the steel formwork is arranged between the two groups of main support frames, at least one group of positioning rods fixedly arranged and slidable in the vertical direction is arranged on the main support frame; a transverse stop rod is arranged at the end of the positioning rod, a longitudinal stop rod is vertically arranged on the rod body of the transverse stop rod, and a right-angle positioning surface is formed between the transverse stop rod and the longitudinal stop rod to position the end surface of the steel formwork.

[0013] As a further scheme of the present application: at least two groups of transverse adjusting rods arranged in parallel are arranged between the main support frames, the two ends of the transverse adjusting rods are open, the rod-shaped transverse support frames are slidingly arranged in the openings of the transverse adjusting rods, the ends of the transverse support frames away from the transverse adjusting rods are fixed with the main support frames, and the transverse support frames and the transverse adjusting rods are fixed through the second locking screw after sliding fit; the support seat is fixed on the two transverse adjusting rods, the top of the support seat is used for supporting the steel formwork, and the bottom of the support seat abuts against the conveying belt.

[0014] As a further scheme of the present application: the main support frame is in a ladder structure, including two groups of vertical rods arranged in vertical and at least two groups of horizontal rods for connecting the vertical rods, the two ends of the vertical rods of the main support frame are open, the positioning rod is slidingly fitted with the top opening of the vertical rod in vertical after being fixed through the first locking screw; the traveling support is installed at the bottom opening of the vertical rod and is driven by the second telescopic cylinder on the main support frame to be slidingly fitted with the main support frame in vertical; the traveling support is provided with universal wheels at the bottom.

[0015] A detection method of a bridge arc-shaped steel formwork flatness detection device, characterized by comprising the following steps:

[0016] S1, the steel formwork is placed on the support seat of the positioning frame, and the positioning frame is adjusted to clamp and fix the steel formwork;

[0017] S2, the steel formwork is moved to the conveying belt, and the steel formwork is linearly conveyed by the conveying belt to reach below the detection mechanism of the detection frame;

[0018] S3, the laser displacement sensor is started, the distance between the mold surface of the steel formwork and the laser flatness measuring instrument is measured, and the extension amount of the swing inserting rod is adjusted, so that the distance between the laser flatness measuring instrument and the steel formwork reaches the set detection distance;

[0019] S4, the detection mechanism is started to drive the swing inserting rod to drive the mounting frame to swing along the mold surface of the steel formwork, the extension amount of the swing inserting rod is controlled at the same time, so that the laser flatness measuring instrument and the steel formwork always maintain a set distance; the first driving motor synchronously drives the laser flatness measuring instrument on the mounting frame to rotate, so that the laser flatness measuring instrument always faces the surface of the steel formwork at a set angle;

[0020] S5, the laser flatness measuring instrument is driven to traverse the mold surface of the steel formwork to obtain the flatness data of the steel formwork.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] 1. The application cooperates the two-stage rotary mechanism with the linear telescopic unit, combines the laser displacement sensor to detect the distance between the laser flatness measuring instrument and the steel formwork in real time, so that the laser flatness measuring instrument and the formwork surface can always maintain the optimal detection distance and angle during scanning along the steel formwork surface, and the rapid detection of the flatness of the arc-shaped steel formwork surface can be realized.

[0023] 2. The application adopts the sliding cooperation structure of the swing sleeve and the swing plug rod, and is driven by the first telescopic cylinder, realizes stable and controllable linear telescopic motion, ensures that the laser detection module does not shake during telescopic process, and guarantees the stability of measurement data; the rotary motion between the mounting bracket and the swing plug rod can be generated through the worm gear transmission, the swing angle is adjusted in real time to adapt to the arc surface of the steel formwork; and since the worm gear mechanism has reverse self-locking property, when the motor stops, the mounting bracket and the laser measuring instrument can be locked at any angle position, and deviation caused by gravity or vibration is avoided, so that the stability of the posture during measurement is guaranteed.

[0024] 3. The application arranges multiple laser flatness measuring instruments at equal intervals, so that the flatness data of multiple positions in the width direction of the formwork can be synchronously obtained in one swing of the device, the detection efficiency is greatly improved, and the detection time is shortened; the laser displacement sensor can monitor the distance between the laser flatness measuring instrument and the steel formwork surface in real time, and provides a feedback signal for controlling the telescopic amount of the swing plug rod; the linear telescopic unit also adopts the worm gear mechanism to drive rotation, and the mounting bracket can be locked at the position where stopping is required, so that the laser flatness measuring instrument is prevented from shaking.

[0025] 4. The application sets the detection frame of the portal frame type, provides stable support for the detection mechanism, and can cover formworks of different widths; the conveying belt automatically transports the steel formwork to be detected to the detection station, and improves the automation degree of the detection process.

[0026] 5. The slidable positioning rod and the right-angle positioning surface formed by the transverse and longitudinal stop rods can quickly position and clamp the end surface of the steel formwork, so that the steel formwork can be kept fixed during the detection process; the sliding cooperation between the transverse adjusting rod and the transverse support frame can quickly adjust the width between the two groups of main support frames, so as to adapt to steel formworks of different widths; the support seat is directly fixed on the transverse adjusting rod and supports the steel formwork, and the bottom is in contact with the conveying belt, so that the support and positioning and the linear conveying are realized; the traveling support frame with universal wheels is controlled to rise and fall through the second telescopic cylinder on the main support frame, so that the traveling support frame can be retracted during detection, and the universal wheels can be placed on the ground after detection, so that the positioning frame can be directly pushed. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the isometric view of the application.

[0028] Figure 2 The main view of the present application.

[0029] Figure 3 The structural schematic diagram of the positioning frame in the present application.

[0030] Figure 4 The structural schematic diagram of the detection mechanism in the present application.

[0031] Figure 5 The structural schematic diagram of the laser detection module in the present application. Figure 4 The enlarged schematic diagram of A in the figure.

[0032] Figure 6 The structural schematic diagram of the laser detection module in the present application.

[0033] The structural schematic diagram of the laser detection module in the present application.

[0034] 1, detection frame; 2, detection mechanism;

[0035] 21, swing sleeve; 22, swing insertion rod; 221, first drive motor; 222, first worm;

[0036] 23, first telescopic cylinder; 24, second drive motor;

[0037] 241, second worm shaft; 242, second worm; 243, second worm gear; 25, laser detection module;

[0038] 251, mounting frame; 252, laser flatness measuring instrument; 253, first worm shaft;

[0039] 254, first worm gear; 255, laser displacement sensor;

[0040] 3, positioning frame; 31, main support frame; 311, first locking screw;

[0041] 32, positioning rod; 321, transverse blocking rod; 322, longitudinal blocking rod;

[0042] 33, second telescopic cylinder; 34, traveling support; 341, universal wheel;

[0043] 35, transverse adjustment rod; 351, second locking screw; 36, transverse support frame; 37, support seat;

[0044] 4, conveying belt; 5, steel formwork. DETAILED DESCRIPTION

[0045] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0046] Please refer to Figures 1-6 In the embodiments of the present application, the bridge arc-shaped steel formwork flatness detection device and detection method, the detection frame 1 adopts a gantry structure, the width of the detection frame 1 is greater than the width of the steel formwork 5, and the detection frame 1 is horizontally arranged above the conveying belt 4. The conveying direction of the conveying belt 4 is parallel to the axis direction of the steel formwork 5.

[0047] The detection mechanism 2 includes a group of linear extension units, each of the linear extension units includes a swing sleeve 21 and a swing plug 22 coaxially arranged, the swing plug 22 is slidingly fitted in the swing sleeve 21, and a first extension cylinder 23 is mounted on the swing sleeve 21 along the length direction of the swing sleeve 21 to realize the extension and retraction movement between the swing sleeve 21 and the swing plug 22. The driving end of the first extension cylinder 23 is fixed to the swing plug 22, and the swing plug 22 is driven to extend and retract through the movement of the first extension cylinder 23. On the basis of the embodiment, the swing sleeve 21 and the swing plug 22 can also be replaced by extension cylinders with large strokes, which can achieve the same linear extension effect. The distance between the laser flatness measuring instrument 252 and the steel formwork 5 is adjusted through the extension and retraction action.

[0048] In order to realize the swing of the swing sleeve 21 and the swing plug 22, a second worm shaft 241 is fixed to the detection frame 1, the end of the swing sleeve 21 is rotationally fitted to the cross beam of the detection frame 1 through the second worm shaft 241, and the axis of the second worm shaft 241 is parallel to the axis of the steel formwork 5. A second driving motor 24 is arranged on the detection frame 1, and a second worm 242 is coaxially fixed to the motor shaft of the second driving motor 24. The second worm 242 is engaged with a second worm wheel 243 coaxially fixed to the second worm shaft 241 to form a worm and gear pair to drive the swing sleeve 21 to swing. When the second driving motor 24 is started, the second worm 242 drives the second worm wheel 243 and the second worm shaft 241 to rotate, thereby driving the entire linear extension unit to swing around the axis of the second worm shaft 241 to realize the scanning of the arc surface. During the scanning process, the linear extension unit is synchronously extended and retracted, so that the distance between the laser flatness measuring instrument 252 and the steel formwork 5 is kept constant.

[0049] The end of the swing plug 22 is provided with a mounting frame 251, and the length direction of the mounting frame 251 is parallel to the axis of the steel formwork 5. A plurality of laser flatness measuring instruments 252 are mounted on the mounting frame 251 at equal intervals along the length direction of the mounting frame 251, and the flatness data of multiple points in the width direction of the steel formwork 5 can be obtained simultaneously in one scanning.

[0050] The mounting frame 251 is pivotally connected to the end of the swing inserting rod 22 through a first worm shaft 253, and the axis of the first worm shaft 253 is parallel to the axis of the steel die plate 5. A first driving motor 221 is fixed on the swing inserting rod 22, and a first worm 222 is coaxially fixed on the shaft of the first driving motor 221. The first worm 222 is engaged with a first worm wheel 254 coaxially fixed on the first worm shaft 253, thereby forming another worm wheel and worm pair. When the first driving motor 221 is started, the first worm 222 drives the first worm wheel 254 and the first worm shaft 253 to rotate, thereby driving the mounting frame 251 and the laser flatness measuring instrument 252 on the mounting frame 251 to swing around the axis of the first worm shaft 253. Thus, the angle of the laser flatness measuring instrument 252 is adjusted in real time during the swinging process, so as to ensure that the laser flatness measuring instrument 252 is finally perpendicular to the die surface of the measured point and the detection angle is kept constant.

[0051] The mounting frame 251 is further fixed with a laser displacement sensor 255 for measuring the actual distance between the laser flatness measuring instrument 252 and the die surface of the steel die plate 5 in real time, and the distance data is used to dynamically control the extension and retraction of the first telescopic cylinder 23, thereby forming a closed loop control, so that the measurement distance between the laser flatness measuring instrument 252 and the steel die plate 5 is maintained at a constant value, and the measurement error caused by the change of the distance is eliminated.

[0052] The positioning frame 3 is used for clamping and positioning the steel die plate 5, and includes two groups of main support frames 31 arranged in parallel. The main support frame 31 has a ladder structure, and includes two groups of vertical rods arranged in vertical direction and at least two groups of cross rods for connecting the vertical rods. The top end of the vertical rod is provided with a positioning rod 32 which can slide and is fixed in vertical direction. The positioning rod 32 is fixed after sliding by a first locking screw 311. The end of the positioning rod 32 is provided with a transverse stopper 321 and a longitudinal stopper 322 which jointly form a right-angle positioning surface. When the steel die plate 5 is placed, the end thereof abuts against the right-angle surface, so as to be clamped and positioned.

[0053] The bottom of the two groups of vertical rods of the main support frame 31 is provided with a U-shaped traveling support 34 which is vertically slidably connected with the vertical rod of the main support frame 31. The traveling support 34 is provided with universal wheels 341. The main support frame 31 is provided with four groups of universal wheels 341, thereby realizing the walking of the positioning frame 3. The main support frame 31 is fixed with a second telescopic cylinder 33 for driving the traveling support 34 to ascend and descend. When the positioning frame 3 transports the steel die plate 5, the traveling support 34 is lowered, and the universal wheels 341 are placed on the ground. When the detection is performed, the traveling support 34 is retracted, and the support seat 37 is directly supported by the conveying belt 4, thereby driving the steel die plate 5 to linearly travel.

[0054] The support seat 37 is used to support the bottom of the steel formwork 5, and is installed on the two transverse adjusting rods 35. The two ends of the transverse adjusting rod 35 are slidingly inserted into the opening of the transverse support frame 36 to adjust the length, and are locked by the second locking screw 351 after adjustment, so as to adapt to steel formworks 5 of different sizes, and the end of the transverse support frame 36 is welded and fixed with the main support frame 31. The supporting surface of the support seat 37 to the steel formwork 5 is arc-shaped, and rubber plates are arranged on the supporting surface of the support seat 37 to the steel formwork 5 and the contact surface with the conveying belt 4 to improve the friction.

[0055] When the steel formwork 5 is detected, the following steps are included:

[0056] S1, place the steel formwork 5 on the support seat 37 of the positioning frame 3, and adjust the positioning frame 3 to clamp and fix the steel formwork 5; first, adjust the sliding distance between the transverse support frame 36 and the transverse adjusting rod 35 to correspond to the diameter of the steel formwork 5, and then lock the transverse support frame 36 and the transverse adjusting rod 35 by the second locking screw 351. Then adjust the extension length of the positioning rod 32 until the transverse stop rod 321 and the longitudinal stop rod 322 abut against the end surface of the steel formwork 5, and then lock the positioning rod 32 by the first locking screw 311 to realize the position locking of the steel formwork 5.

[0057] S2, move the steel formwork 5 to the conveying belt 4, and convey the steel formwork 5 linearly by the conveying belt 4 to reach below the detection mechanism 2 of the detection frame 1; at this time, the traveling support 34 is retracted by the second telescopic cylinder 33.

[0058] S3, start the laser displacement sensor 255, measure the distance between the mold surface of the steel formwork 5 and the laser flatness measuring instrument 252, and adjust the extension amount of the swing inserting rod 22, so that the distance between the laser flatness measuring instrument 252 and the steel formwork 5 reaches the set detection distance.

[0059] S4, start the detection mechanism 2 to make the swing inserting rod 22 drive the mounting frame 251 to swing along the mold surface of the steel formwork 5, and control the extension amount of the swing inserting rod 22 at the same time, so that the laser flatness measuring instrument 252 and the steel formwork 5 always maintain a set distance; the first driving motor 221 synchronously drives the laser flatness measuring instrument 252 on the mounting frame 251 to rotate, so that the laser flatness measuring instrument 252 always faces the mold surface of the steel formwork 5 at a set angle;

[0060] S5, drive the laser flatness measuring instrument 252 to traverse the mold surface of the steel formwork 5 to obtain the flatness data of the steel formwork 5. The system collects the data of all points to generate a flatness color map or a deviation report of the entire mold surface. After completion, the conveying belt 4 sends the positioning frame 3 and the steel formwork 5 out of the station for discharging and the next detection.

[0061] The basic principles of the application are described above by way of example in connection with specific embodiments, but it should be noted that the advantages, benefits, effects and the like mentioned in the present application are only examples and are not intended to be limiting, and it cannot be considered that these advantages, benefits, effects and the like are necessarily possessed by each embodiment of the present application. In addition, the specific details of the above disclosure are only for the purpose of example and for the purpose of understanding, and are not limiting, and the above details do not limit the present application to necessarily adopt the above specific details for implementation.

[0062] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be as shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have" and the like are open-ended words, mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

Claims

1. A device for detecting flatness of a curved steel formwork of a bridge, characterized in that, The positioning frame (3) includes a positioning mechanism for supporting and positioning a steel template (5), and a detection frame (1) for fixing a detection mechanism (2), the detection mechanism (2) including a set of linear extension units, one end of each linear extension unit being pivotally connected to the detection frame (1) with the pivot axis parallel to the axis of the steel template (5), and the other end of each linear extension unit being fixed with a laser detection module (25), the laser detection module (25) including a mounting frame (251) arranged along the direction parallel to the axis of the steel template (5) and used for fixing a laser flatness measuring instrument (252), the mounting frame (251) being pivotally connected to the linear extension unit with the pivot axis parallel to the axis of the steel template (5), and the linear extension unit and the mounting frame (251) being driven to rotate around the respective pivot axes by independent power sources.

2. The flatness detection device for bridge curved steel formworks according to claim 1, characterized in that, The linear extension unit includes a swing sleeve (21) and a swing plug rod (22) coaxially arranged and slidingly connected to the swing sleeve (21), and the swing sleeve (21) and the swing plug rod (22) are driven by a first extension cylinder (23) to produce linear extension and retraction.

3. The flatness detection device for bridge segmental steel form according to claim 2, characterized in that, The mounting frame (251) and the swing plug rod (22) are connected by a first worm shaft (253) to form a pivot connection, the first worm shaft (253) and the axis of the steel template (5) are parallel to each other, and the power source of the mounting frame (251) is a first drive motor (221) fixed on the swing plug rod (22), a first worm (222) is coaxially fixed on the motor shaft of the first drive motor (221), a first worm wheel (254) is coaxially fixed on the first worm shaft (253), and the first worm (222) and the first worm wheel (254) form a worm and gear connection to drive the mounting frame (251) to rotate around the axis of the first worm shaft (253).

4. The flatness detection device for the curved steel form of a bridge according to any one of claims 1 to 3, characterized in that, The mounting frame (251) is provided with laser flatness measuring instruments (252) at equal intervals along the length direction, and the mounting frame (251) is further provided with a laser displacement sensor (255) for measuring the distance between the laser flatness measuring instruments (252) and the mold surface of the steel template (5).

5. The device for detecting the flatness of a curved steel formwork of a bridge according to any one of claims 1 to 3, characterized in that, The power source of the linear extension unit is a second drive motor (24) fixed on the detection frame (1), the swing sleeve (21) and the detection frame (1) are connected by a second worm shaft (241) to form a pivot connection, the second worm shaft (241) and the axis of the steel template (5) are parallel to each other, a second worm (242) is coaxially fixed on the motor shaft of the second drive motor (24), a second worm wheel (243) is coaxially fixed on the second worm shaft (241), and the second worm (242) and the second worm wheel (243) form a worm and gear connection to drive the swing sleeve (21) to rotate around the axis of the second worm shaft (241).

6. The bridge arc-shaped steel form flatness detection device according to any one of claims 1-3, characterized in that, The steel template (5) is fixed on the positioning frame (3) with the opening upward, the detection frame (1) has a gantry structure with a width greater than that of the steel template (5), and a conveying belt (4) for linearly conveying the positioning frame (3) is arranged below the detection frame (1), and the conveying direction of the conveying belt (4) and the axis of the steel template (5) are parallel to each other.

7. The device for detecting the flatness of a curved steel formwork of a bridge according to any one of claims 1 to 3, characterized in that, The positioning frame (3) comprises two groups of main support frames (31) arranged in parallel and adjustable in spacing, a support seat (37) for supporting the steel formwork (5) is arranged between the two groups of main support frames (31), and at least one group of positioning rods (32) is arranged on the main support frame (31) and can slide in the vertical direction and be fixed; the end of the positioning rod (32) is arranged with a transverse stop rod (321), a longitudinal stop rod (322) is vertically arranged on the rod body of the transverse stop rod (321), and a right-angle positioning surface is formed between the transverse stop rod (321) and the longitudinal stop rod (322) to position the end face of the steel formwork (5).

8. The flatness detection device for bridge segmental steel form according to claim 7, characterized in that, At least two groups of transverse adjustment rods (35) are arranged in parallel between the main support frames (31), the two ends of the transverse adjustment rod (35) are open, a rod-shaped transverse support frame (36) is slidingly arranged in the opening of the transverse adjustment rod (35), the end of the transverse support frame (36) away from the transverse adjustment rod (35) is fixed with the main support frame (31), and the transverse support frame (36) and the transverse adjustment rod (35) are slidingly matched and then fixed through the second locking screw (351); the support seat (37) is fixed on the two transverse adjustment rods (35), the top of the support seat (37) is used for supporting the steel formwork (5), and the bottom of the support seat (37) abuts against the conveying belt (4).

9. The flatness detection device for curved steel formwork of a bridge according to claim 7, characterized in that, The main support frame (31) is in a ladder structure, comprising two groups of vertical rods arranged vertically and at least two groups of horizontal rods for connecting the vertical rods, the vertical rods of the main support frame (31) are open at both ends, the positioning rod (32) is vertically slidingly matched with the top opening of the vertical rod and then fixed through the first locking screw (311); the traveling support (34) is installed at the bottom opening of the vertical rod and is vertically slidingly matched with the main support frame (31) driven by the second telescopic cylinder (33) on the main support frame (31); the traveling support (34) is provided with universal wheels (341) at the bottom.

10. The detection method of the bridge arc-shaped steel form flatness detection device according to any one of claims 1-3, characterized in that, The method comprises the following steps: S1, placing the steel formwork (5) on the support seat (37) of the positioning frame (3), and adjusting the positioning frame (3) to clamp and fix the steel formwork (5); S2, moving the steel formwork (5) to the conveying belt (4), linearly conveying the steel formwork (5) through the conveying belt (4), and making the steel formwork (5) reach below the detection mechanism (2) of the detection frame (1); S3, starting the laser displacement sensor (255), measuring the spacing between the mold surface of the steel formwork (5) and the laser flatness measuring instrument (252), and adjusting the telescopic amount of the swing insertion rod (22) to make the spacing between the laser flatness measuring instrument (252) and the steel formwork (5) reach the set detection spacing; S4, starting the detection mechanism (2) to make the swing insertion rod (22) drive the mounting frame (251) to swing along the mold surface of the steel formwork (5), and controlling the telescopic amount of the swing insertion rod (22) while swinging to make the laser flatness measuring instrument (252) and the steel formwork (5) always maintain the set spacing; the first driving motor (221) synchronously drives the laser flatness measuring instrument (252) on the mounting frame (251) to rotate, so that the laser flatness measuring instrument (252) always faces the surface of the steel formwork (5) at a set angle. S5, drive the laser flatness measuring instrument (252) to traverse the die surface of the steel die plate (5), and obtain the flatness data of the steel die plate (5).

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