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

Abstract

The invention relates to the field of detection, in particular to a bridge arc-shaped steel formwork flatness detection device and method.The bridge arc-shaped steel formwork flatness detection device comprises a positioning frame used for supporting and positioning a steel formwork and further comprises a detection frame used for fixing a detection mechanism, the detection mechanism comprises a set of linear telescopic units, and one end of each linear telescopic unit is matched with the detection frame in a rotating mode; the rotation axis is parallel to the axis of the steel template; a laser detection module is fixed at the other end of the linear telescopic unit; the laser detection module comprises an installation frame which is arranged in the direction parallel to the axis of the steel formwork and used for fixing a laser flatness measuring instrument, the installation frame is matched with the linear telescopic unit in a rotating mode, the rotating axis is parallel to the axis of the steel formwork, and the linear telescopic unit and the installation frame are driven by independent power sources to rotate around the rotating axes of the linear telescopic unit and the installation frame respectively. According to the invention, rapid detection of the flatness of the die surface of the arc-shaped steel template can be realized, and the detection precision is high.

Description

Technical Field

[0001] This invention relates to the field of testing, specifically to a device and method for testing the flatness of curved steel formwork for bridges. Background Technology

[0002] In bridge construction, curved steel formwork is a crucial forming tool for shaping curved structures such as arches and towers. The flatness of its working surface directly determines the geometric accuracy and surface quality of the final concrete components. If the flatness of the curved steel formwork is substandard, it will lead to distortion or stress concentration in the cast curved structure, severely affecting the overall aesthetic appearance and load-bearing performance of the bridge, and creating structural safety hazards and reducing the bridge's service life. Therefore, flatness testing of curved bridge steel formwork is a necessary step to ensure the safety, reliability, and quality compliance of the bridge structure.

[0003] However, current structures for inspecting the flatness of steel formwork, as described in "CN117553712B," are mainly limited to the inspection of flat steel formwork. The flat steel formwork is placed on a conveyor structure, and the laser inspection mechanism is adjusted to a set distance from the formwork before its flatness is determined by laser scanning. Because curved steel formwork surfaces have a certain curvature, and different steel formworks have different radii of curvature, existing flat inspection mechanisms cannot adapt to the curved surfaces of steel formwork for inspection. Even with the addition of a swing mechanism to make the laser inspection mechanism swing, it is impossible to guarantee that the laser inspection mechanism and the steel formwork will always maintain the set distance and angle, leading to inspection errors. Therefore, a solution is urgently needed. Summary of the Invention

[0004] To avoid and overcome the technical problems existing in the prior art, this invention provides a device and method for detecting the flatness of curved steel formwork for bridges. This invention enables rapid detection of the flatness of the curved steel formwork surface with high accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A device for detecting the flatness of curved steel formwork for bridges includes a positioning frame for supporting and positioning the steel formwork, and a detection frame for fixing the detection mechanism. The detection mechanism includes a set of linear telescopic units. One end of the linear telescopic unit is rotatably engaged with the detection frame, and the axis of rotation is parallel to the axis of the steel formwork. A laser detection module is fixed to the other end of the linear telescopic unit. The laser detection module includes a mounting frame arranged along the direction parallel to the axis of the steel formwork and used to fix a laser flatness measuring instrument. The mounting frame is rotatably engaged with the linear telescopic unit, and the axis of rotation is parallel to the axis of the steel formwork. The linear telescopic unit and the mounting frame are driven by an independent power source to rotate around their own axes of rotation.

[0006] As a further aspect of the present invention: the linear telescopic unit includes a swing sleeve and a swing insert rod arranged coaxially with the swing sleeve and slidingly telescopically engaged; the swing sleeve and the swing insert rod are driven by a first telescopic cylinder to generate a linear telescopic action.

[0007] As a further embodiment of the present invention: the mounting frame and the swinging rod are connected by a first worm gear shaft to form a rotary fit. The first worm gear shaft and the axis of the steel template are parallel to each other. The power source of the mounting frame is a first drive motor fixed on the swinging rod. A first worm is coaxially fixed on the motor shaft of the first drive motor, and a first worm wheel is coaxially fixed on the first worm gear shaft. The first worm and the first worm wheel form a worm gear fit to drive the mounting frame to rotate around the axis of the first worm gear shaft.

[0008] As a further embodiment of the present invention: laser flatness measuring instruments are installed at equal intervals along the length direction on the mounting frame, and a laser displacement sensor for measuring the distance between the laser flatness measuring instrument and the steel template surface is also fixed on the mounting frame.

[0009] As a further embodiment of the present invention: the power source of the linear telescopic unit is a second drive motor fixed on the testing frame. The swing sleeve is connected to the testing frame through a second worm gear shaft to form a rotary fit. The axis of the second worm gear shaft is parallel to the axis of the steel template. A second worm is coaxially fixed on the motor shaft of the second drive motor, and a second worm wheel is coaxially fixed on the second worm gear shaft. The second worm and the second worm wheel form a worm gear fit to drive the swing sleeve to rotate around the axis of the second worm gear shaft.

[0010] As a further embodiment of the present invention: the steel template is fixed to the positioning frame with the opening facing upward, the inspection frame has a gantry-type structure with a width greater than the width of the steel template, and a conveyor belt for linearly conveying the positioning frame is provided below the inspection frame, the conveying direction of the conveyor belt is parallel to the axis of the steel template.

[0011] As a further embodiment of the present invention: the positioning frame includes two sets of parallel main support frames with adjustable spacing, and a support seat for supporting the steel template is provided between the two sets of main support frames. At least one set of positioning rods that can slide and be fixed in the vertical direction are provided on the main support frames. A transverse stop is provided at the end of the positioning rod, and a longitudinal stop is provided vertically on the body of the transverse stop. The transverse stop and the longitudinal stop together form a right-angle positioning surface for positioning the end face of the steel template.

[0012] As a further embodiment of the present invention: at least two sets of parallel transverse adjusting rods are provided between the main support frames. The two ends of the transverse adjusting rods are open. The rod-shaped transverse support frame is slidably disposed in the opening of the transverse adjusting rod. The end of the transverse support frame away from the transverse adjusting rod is fixed to the main support frame. The transverse support frame and the transverse adjusting rod are slidably engaged and then fixed by a second locking screw. The support base is fixed on the two transverse adjusting rods. The top of the support base is used to support the steel template, and the bottom of the support base abuts against the conveyor belt.

[0013] As a further embodiment of the present invention: the main support frame has a ladder-like structure, including two sets of vertically arranged uprights and at least two sets of horizontal bars for connecting the uprights. The uprights of the main support frame are open at both ends. The positioning rod is vertically slidably engaged with the top opening of the upright and then fixed by the first locking screw. The traveling bracket is installed at the bottom opening of the upright and is driven by the second telescopic cylinder on the main support frame to slide vertically with the main support frame. The bottom of the traveling bracket is provided with casters.

[0014] A method for detecting the flatness of a bridge curved steel formwork, characterized by comprising the following steps: S1. Place the steel formwork on the support of the positioning frame, and adjust the positioning frame to clamp and fix the steel formwork. S2. Move the steel template onto the conveyor belt and transport it in a straight line until it reaches the bottom of the testing mechanism of the testing frame; S3. Activate the laser displacement sensor to measure the distance between the template surface of the steel template and the laser flatness measuring instrument, and adjust the extension and retraction of the swing rod to make the distance between the laser flatness measuring instrument and the steel template reach the set detection distance. S4. Start the detection mechanism to make the swinging rod drive the mounting frame to swing along the mold surface of the steel template. While swinging, control the extension and retraction of the swinging rod so that the laser flatness measuring instrument and the steel template are always kept at the set distance. The first drive motor synchronously drives the laser flatness measuring instrument on the mounting frame to rotate so that the laser flatness measuring instrument is always facing the surface of the steel template at the set angle. S5. Drive the laser flatness measuring instrument to traverse the surface of the steel template and obtain the flatness data of the steel template.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a two-stage rotary mechanism in conjunction with a linear telescopic unit, combined with a laser displacement sensor to detect the distance between the laser flatness measuring instrument and the steel template in real time. This ensures that the laser flatness measuring instrument and the template surface always maintain the optimal detection distance and angle when scanning along the template surface, enabling rapid detection of the flatness of the curved steel template surface with high accuracy.

[0016] 2. This invention employs a sliding fit structure of a swing sleeve and a swing rod, driven by a first telescopic cylinder, achieving stable and controllable linear telescopic motion. This ensures that the laser detection module does not shake during telescopic movement, guaranteeing the stability of the measurement data. The worm gear transmission allows for rotation between the mounting frame and the swing rod, adjusting the swing angle in real time to match the curved surface of the steel template. Furthermore, due to the reverse self-locking property of the worm gear mechanism, when the motor stops, the mounting frame and laser measuring instrument can be locked at any angle position, preventing displacement due to gravity or vibration, thus ensuring the stability of the posture during measurement.

[0017] 3. By arranging multiple laser flatness measuring instruments at equal intervals, this invention can simultaneously acquire flatness data at multiple positions along the width direction of the template during one swing of the device, greatly improving detection efficiency and shortening detection time; the laser displacement sensor can monitor the distance between the laser flatness measuring instrument and the surface of the steel template in real time, providing feedback signals for controlling the extension and retraction of the swinging rod; the linear telescopic unit also uses a worm gear mechanism to drive the rotation, and the mounting frame can be locked at the position where it needs to stop to prevent the laser flatness measuring instrument from shaking.

[0018] 4. This invention provides a stable support for the testing mechanism by setting up a gantry-type testing frame, which can cover templates of different widths; the conveyor belt automatically transports the steel templates to be tested to the testing station, improving the automation level of the testing process.

[0019] 5. This invention, through a sliding positioning rod and a right-angle positioning surface formed by transverse and longitudinal stops, can quickly position and clamp the end face of the steel template, ensuring that the steel template remains fixed during the inspection process; through the sliding cooperation between the transverse adjustment rod and the transverse support frame, the width between the two sets of main support frames can be quickly adjusted to accommodate steel templates of different widths; the support base is directly fixed on the transverse adjustment rod and supports the steel template, with its bottom in contact with the conveyor belt, simultaneously achieving support positioning and linear conveying; the traveling bracket with casters is raised and lowered by the second telescopic cylinder on the main support frame, allowing the traveling bracket to be retracted during inspection and lowered after inspection, so that the casters can be placed on the ground for easy pushing of the positioning frame. Attached Figure Description

[0020] Figure 1 This is an isometric view of the present invention.

[0021] Figure 2 This is the front view of the present invention.

[0022] Figure 3 This is a schematic diagram of the positioning frame in this invention.

[0023] Figure 4 This is a schematic diagram of the detection mechanism in this invention.

[0024] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0025] Figure 6 This is a schematic diagram of the laser detection module in this invention.

[0026] In the picture: 1. Testing frame; 2. Testing organization; 21. Swinging sleeve; 22. Swinging insert; 221. First drive motor; 222. First worm gear; 23. First telescopic cylinder; 24. Second drive motor; 241. Second worm gear shaft; 242. Second worm; 243. Second worm gear; 25. Laser detection module; 251. Mounting bracket; 252. Laser flatness measuring instrument; 253. First worm gear shaft; 254. First worm gear; 255. Laser displacement sensor; 3. Positioning frame; 31. Main support frame; 311. First locking screw; 32. Positioning rod; 321. Lateral stop bar; 322. Longitudinal stop bar; 33. Second telescopic cylinder; 34. Traveling support; 341. Casters; 35. Lateral adjusting rod; 351. Second locking screw; 36. Lateral support frame; 37. Support base; 4. Conveyor belt; 5. Steel formwork. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-6 In this embodiment of the invention, a device and method for detecting the flatness of a bridge curved steel formwork are provided. The detection frame 1 adopts a gantry frame structure, and its width is greater than the width of the steel formwork 5, spanning across the conveyor belt 4. The conveying direction of the conveyor belt 4 is parallel to the axial direction of the steel formwork 5.

[0029] The testing mechanism 2 includes a set of linear telescopic units. Each linear telescopic unit includes a coaxially arranged swing sleeve 21 and a swing rod 22. The swing rod 22 slides within the swing sleeve 21. To achieve telescopic movement between the swing sleeve 21 and the swing rod 22, a first telescopic cylinder 23 is installed on the swing sleeve 21 along its length. The drive end of the first telescopic cylinder 23 is fixed to the swing rod 22, and the movement of the first telescopic cylinder 23 drives the swing rod 22 to extend or retract. Based on this embodiment, the swing sleeve 21 and the swing rod 22 can also be replaced with a telescopic cylinder with a large stroke to achieve the same linear telescopic effect. The distance between the laser flatness measuring instrument 252 and the surface of the steel template 5 is adjusted by the telescopic movement.

[0030] To enable the swinging of the swing sleeve 21 and the swinging rod 22, a second worm gear shaft 241 is fixed on the inspection frame 1. The end of the swing sleeve 21 is rotated with the crossbeam of the inspection frame 1 through the second worm gear shaft 241. The axis of the second worm gear shaft 241 is parallel to the axis of the steel template 5. A second drive motor 24 on the inspection frame 1 has a second worm 242 coaxially fixed on its motor shaft. The second worm 242 meshes with a second worm wheel 243 coaxially fixed on the second worm gear shaft 241, forming a worm gear pair to drive the swing sleeve 21 to swing. When the second drive motor 24 starts, it drives the second worm wheel 243 and the second worm gear shaft 241 to rotate through the second worm 242, thereby driving the entire linear telescopic unit to swing around the axis of the second worm gear shaft 241 to achieve scanning of the arc surface. During the scanning process, the linear telescopic unit extends and retracts synchronously, thereby keeping the distance between the mold surfaces of the laser flatness measuring instrument 252 constant.

[0031] A mounting bracket 251 is arranged at the end of the swing rod 22. The length direction of the mounting bracket 251 is parallel to the axis of the steel template 5. Multiple laser flatness measuring instruments 252 are installed at equal intervals along the length direction of the mounting bracket 251, which can simultaneously acquire flatness data of multiple points in the width direction of the template in one scan.

[0032] The mounting frame 251 achieves a rotary engagement with the end of the swing rod 22 via a first worm gear shaft 253, the axis of which is parallel to the axis of the steel template 5. A first drive motor 221, fixed to the swing rod 22, has a first worm gear 222 coaxially fixed to its motor shaft. The first worm gear 222 meshes with a first worm wheel 254 coaxially fixed to the first worm gear shaft 253, forming another worm gear pair. After the first drive motor 221 starts, it drives the first worm wheel 254 and the first worm gear shaft 253 to rotate via the first worm gear 222, thereby causing the entire mounting frame 251 and the laser flatness measuring instrument 252 on the mounting frame 251 to swing around the axis of the first worm gear shaft 253. This allows for real-time adjustment of the angle of the laser flatness measuring instrument 252 during the swing process, ensuring that it is ultimately perpendicular to the surface of the measured point and maintaining a constant detection angle.

[0033] A laser displacement sensor 255 is also fixed on the mounting bracket 251. It is used to measure the actual distance between the laser flatness measuring instrument 252 and the steel template 5 in real time. Based on this distance data, the extension and retraction of the first telescopic cylinder 23 are dynamically controlled to form a closed-loop control, so that the measurement distance between the laser flatness measuring instrument 252 and the steel template 5 is maintained at a constant value, eliminating the measurement error caused by the distance change.

[0034] The positioning frame 3 is used to clamp and position the steel formwork 5. It includes two sets of parallel main support frames 31, which have a trapezoidal structure and include two sets of vertically arranged uprights and at least two sets of horizontal bars for connecting the uprights. A positioning rod 32, which can slide and be fixed vertically, is provided at the top of each upright. After sliding and fixing, the positioning rod 32 is secured by a first locking screw 311. A transverse stop 321 and a longitudinal stop 322 at the end of the positioning rod 32 together form a right-angled positioning surface. When the steel formwork 5 is placed, its end is pressed against this right-angled surface, thus being clamped and positioned.

[0035] The bottom of the two sets of uprights of the main support frame 31 is equipped with U-shaped traveling brackets 34, which slide vertically with the uprights of the main support frame 31. The traveling brackets 34 are equipped with casters 341, and the main support frame 31 has a total of four sets of casters 341, enabling the positioning frame 3 to move. A second telescopic cylinder 33 is fixed on the main support frame 31 to drive the traveling brackets 34 to rise and fall. When the positioning frame 3 transports the steel template 5, the traveling brackets 34 are lowered, and the casters 341 touch the ground. During inspection, the traveling brackets 34 are retracted, and the support base 37 is directly supported by the conveyor belt 4, thereby driving the steel template 5 to move linearly.

[0036] The support base 37 supports the bottom of the steel template 5 and is mounted on two transverse adjustment rods 35. The two ends of the transverse adjustment rods 35 slide into the openings of the transverse support frame 36 to adjust their length. After adjustment, they are locked in place by the second locking screw 351, thus accommodating steel templates 5 of different sizes. The ends of the transverse support frame 36 are welded and fixed to the main support frame 31. The supporting surface of the support base 37 for the steel template 5 is curved. Rubber plates are provided on both the supporting surface of the support base 37 for the steel template 5 and the contact surface with the conveyor belt 4 to improve friction.

[0037] The inspection of steel formwork 5 includes the following steps: S1. Place the steel template 5 on the support seat 37 of the positioning frame 3, and adjust the positioning frame 3 to clamp and fix the steel template 5. First, adjust the sliding distance between the transverse support frame 36 and the transverse adjusting rod 35 so that it corresponds to the diameter of the steel template 5. Then, lock the transverse support frame 36 and the transverse adjusting rod 35 with the second locking screw 351. Next, adjust the extension length of the positioning rod 32 until the transverse stop 321 and the longitudinal stop 322 abut against the end face of the steel template 5. Then, lock the positioning rod 32 with the first locking screw 311 to lock the position of the steel template 5.

[0038] S2. Move the steel template 5 onto the conveyor belt 4 and transport the steel template 5 in a straight line through the conveyor belt 4 until it reaches the bottom of the testing mechanism 2 of the testing frame 1; at this time, the traveling support 34 is retracted by the second telescopic cylinder 33.

[0039] S3. Activate the laser displacement sensor 255 to measure the distance between the template surface of the steel template 5 and the laser flatness measuring instrument 252, and adjust the extension and retraction of the swing rod 22 so that the distance between the laser flatness measuring instrument 252 and the steel template 5 reaches the set detection distance.

[0040] S4. Start the detection mechanism 2 to make the swinging rod 22 drive the mounting frame 251 to swing along the mold surface of the steel template 5. While swinging, control the extension and retraction of the swinging rod 22 so that the laser flatness measuring instrument 252 and the steel template 5 are always maintained at the set distance. The first drive 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 is always facing the mold surface of the steel template 5 at the set angle. S5. Drive the laser flatness measuring instrument 252 to traverse the surface of the steel template 5 and obtain the flatness data of the steel template 5. The system collects data from all points and generates a color image or deviation report of the flatness of the entire template surface. After completion, the conveyor belt 4 sends the positioning frame 3 and the steel template 5 out of the workstation for unloading and the next inspection.

[0041] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0042] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Claims

1. A device for detecting the flatness of curved steel formwork for bridges, characterized in that, The system includes a positioning frame (3) for supporting and positioning the steel template (5), and a testing frame (1) for fixing the testing mechanism (2). The testing mechanism (2) includes a set of linear telescopic units. One end of the linear telescopic unit is rotated with the testing frame (1), and the axis of rotation is parallel to the axis of the steel template (5). The other end of the linear telescopic unit is fixed with a laser testing module (25). The laser testing module (25) includes a mounting frame (251) arranged along the axis parallel to the steel template (5) and used to fix the laser flatness measuring instrument (252). The mounting frame (251) is rotated with the linear telescopic unit, and the axis of rotation is parallel to the axis of the steel template (5). The linear telescopic unit and the mounting frame (251) are driven by an independent power source and rotate around their own axis of rotation.

2. The bridge arc-shaped steel formwork flatness detection device according to claim 1, characterized in that, The linear telescopic unit includes a swing sleeve (21) and a swing insert (22) arranged coaxially with the swing sleeve (21) and slidingly telescopically engaged; the swing sleeve (21) and the swing insert (22) are driven by a first telescopic cylinder (23) to generate a linear telescopic action.

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

4. A bridge arched steel formwork flatness testing device according to any one of claims 1 to 3, characterized in that, A laser flatness measuring instrument (252) is installed at equal intervals along the length direction on the mounting frame (251). A laser displacement sensor (255) for measuring the distance between the laser flatness measuring instrument (252) and the surface of the steel template (5) is also fixed on the mounting frame (251).

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

6. A bridge arched steel formwork flatness testing device according to any one of claims 1 to 3, characterized in that, The steel template (5) is fixed on the positioning frame (3) with its opening facing upward. The inspection frame (1) has a gantry structure with a width greater than that of the steel template (5). A conveyor belt (4) for linearly conveying the positioning frame (3) is provided below the inspection frame (1). The conveying direction of the conveyor belt (4) is parallel to the axis of the steel template (5).

7. A bridge arched steel formwork flatness testing device according to any one of claims 1 to 3, characterized in that, The positioning frame (3) includes two sets of parallel main support frames (31) with adjustable spacing. A support seat (37) for supporting the steel template (5) is provided between the two sets of main support frames (31). At least one set of positioning rods (32) that can slide and be fixed in the vertical direction are provided on the main support frame (31). A transverse stop bar (321) is provided at the end of the positioning rod (32). A longitudinal stop bar (322) extends vertically from the body of the transverse stop bar (321). The transverse stop bar (321) and the longitudinal stop bar (322) enclose each other to form a right-angle positioning surface for positioning the end face of the steel template (5).

8. The bridge arched steel formwork flatness detection device according to claim 7, characterized in that, At least two sets of parallel transverse adjustment rods (35) are provided between the main support frame (31). The two ends of the transverse adjustment rod (35) are open. The rod-shaped transverse support frame (36) is slidably set 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 to the main support frame (31). The transverse support frame (36) and the transverse adjustment rod (35) are slidably engaged and then fixed by 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 to support the steel template (5). The bottom of the support seat (37) abuts against the conveyor belt (4).

9. The bridge arched steel formwork flatness detection device according to claim 7, characterized in that, The main support frame (31) has a ladder-like structure, including two sets of vertically arranged uprights and at least two sets of horizontal bars for connecting the uprights. The uprights of the main support frame (31) are open at both ends. The positioning rod (32) is vertically slidably engaged with the top opening of the upright and then fixed by the first locking screw (311). The traveling bracket (34) is installed at the bottom opening of the upright and is driven by the second telescopic cylinder (33) on the main support frame (31) to slide vertically with the main support frame (31). The bottom of the traveling bracket (34) is provided with casters (341).

10. A testing method for a bridge curved steel formwork flatness testing device according to any one of claims 1 to 3, characterized in that, Includes the following steps: S1. Place the steel template (5) on the support seat (37) of the positioning frame (3) and adjust the positioning frame (3) to clamp and fix the steel template (5); S2. Move the steel template (5) onto the conveyor belt (4) and transport the steel template (5) in a straight line through the conveyor belt (4) until it reaches the bottom of the testing mechanism (2) of the testing frame (1); S3. Start the laser displacement sensor (255), measure the distance between the template surface of the steel template (5) and the laser flatness measuring instrument (252), and adjust the extension and retraction of the swing rod (22) so that the distance between the laser flatness measuring instrument (252) and the steel template (5) reaches the set detection distance. S4. Start the detection mechanism (2) to make the swinging rod (22) drive the mounting frame (251) to swing along the mold surface of the steel template (5). While swinging, control the extension and retraction of the swinging rod (22) so that the laser flatness measuring instrument (252) and the steel template (5) are always kept at the set distance. The first drive 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) is always facing the surface of the steel template (5) at the set angle. S5. Drive the laser flatness measuring instrument (252) to traverse the mold surface of the steel template (5) and obtain the flatness data of the steel template (5).

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