Adjusting device and adjusting method for adjustable universal profile steel arch frame

Abstract

The invention provides an adjustable universal profile steel arch frame adjusting device and an adjusting method thereof, a steel arch frame is connected through a plurality of standard sections to form a steel arch bridge structure, the tops of the adjacent standard sections are connected through an adjusting screw rod, the bottoms of the adjacent standard sections are hinged, the standard sections are provided with speed reducing motors, and the speed reducing motors are connected with the adjusting screw rod. The gear motor drives the nut sleeve of the adjusting screw rod to rotate, and the camber of the whole steel arch can be adjusted by changing the distance between the tops of the adjacent standard sections driven by the nut sleeve. And the adjustment is not limited by the problems of complexity and accuracy of manual adjustment, so that the engineering efficiency and the engineering quality are remarkably improved, the installation cost is reduced, and the safety and durability of a bridge structure are enhanced.

Description

Technical Field

[0001] The invention relates to the field of steel arch frame adjustment, in particular to an adjustable universal steel arch frame adjustment device and an adjustment method thereof. Background Art

[0002] Currently, most cast-in-place steel arch frames for arch bridges in China are specialized steel arch frames and steel arch frames assembled from stock components. Dedicated steel arch frames are mostly arched steel truss structures assembled and welded from sections of steel and steel plates, and are primarily used for the construction of arch rings for reinforced concrete cast-in-place arch bridges. Steel arch frames assembled from stock components are primarily assembled from stock components such as Bailey beams and universal rods, and are used for the construction of reinforced concrete arch rings for cast-in-place arch bridges. Regardless of whether it is a specialized steel arch frame or a steel arch frame assembled from stock components, for cast-in-place arch bridges with different spans and different rise-to-span ratios, a large number of special rods must be processed to adjust the amplitude of the arch frame to accommodate different arch axis shapes.

[0003] Chinese patent CN113914189A provides an adjustable universal steel arch frame, which includes a support system, an arch foot standard segment, a standard segment, an arch crown closure segment, an adjusting screw, a connecting steel pin and a transverse connection system; the support system is arranged at the front edge of the arch seat on both sides, and is used to support the weight of the steel arch frame and the cast-in-place arch ribs. The horizontal load of the support is borne by the arch seat, and the vertical load is transmitted to the foundation through a distribution beam and a sand cylinder. The support is connected to the arch foot standard segment through a steel pin; the lower end of the arch foot standard segment is rotatably connected to the lower end of the standard segment and the lower ends of two adjacent standard segments by a connecting steel pin, and the upper end of the arch foot standard segment is connected to the upper end of the standard segment and the upper ends of two adjacent standard segments by an adjusting screw.

[0004] The standard segments mentioned in patent CN113914189A, or the technical solution, do have limitations if they can only be adjusted manually, with poor accuracy and progress. This not only requires high worker skills, but can also affect the efficiency and accuracy of the overall structure during actual use. The need for factory pre-adjustment before assembly undoubtedly increases the time and complexity of the production process, reducing the flexibility of on-site installation of the equipment or structure. Summary of the Invention

[0005] The main purpose of the present invention is to provide an adjustment device and an adjustment method for an adjustable universal steel arch frame, so as to solve the problem that the universal steel arch frame can only be adjusted manually and has poor installation efficiency and accuracy.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: An adjustable universal steel arch frame adjusting device. The steel arch frame is composed of multiple standard segments connected to form a steel arch bridge structure. The tops between adjacent standard segments are connected by adjusting screws, and the bottoms between adjacent standard segments are hinged. A reduction motor is provided on the standard segment, and the reduction motor drives the nut sleeve of the adjusting screw to rotate. The change in the distance between the tops of adjacent standard segments driven by the nut sleeve can adjust the camber of the entire steel arch frame.

[0007] In a preferred embodiment, threaded rods are respectively connected to both ends of the nut sleeve of the adjusting screw. The left threaded rod and the right threaded rod are respectively hinged to the ends of the standard segments at both ends. A reduction motor is provided below the nut sleeve. A second bevel gear is provided at the output end of the reduction motor, and a first bevel gear is provided on the nut sleeve. The first bevel gear meshes with the second bevel gear, and the reduction motor drives the nut sleeve to rotate.

[0008] In a preferred embodiment, a spline is provided at one end of the outer surface of the nut sleeve, and the other end of the outer surface is a cylindrical section. A rotating sleeve is sleeved on the cylindrical section. The lower end of the rotating sleeve is connected to the mounting bracket, and the reduction motor is arranged on the mounting bracket.

[0009] In a preferred embodiment, a telescopic rod is hinged to one side of the mounting bracket. An anti-rotation sleeve is provided at the end of the telescopic rod, and the anti-rotation sleeve is sleeved on the diagonal rod of the standard segment.

[0010] In a preferred embodiment, the first bevel gear is sleeved on the spline of the outer surface of the nut sleeve. The adjusting screws arranged side by side are connected by a synchronous belt. The synchronous belt is sleeved on the spline of the nut sleeve, and the convex blocks of the synchronous belt are arc-shaped meshed with the spline.

[0011] In a preferred embodiment, a controller is further provided, and the controller is electrically connected to multiple reduction motors.

[0012] The method includes: S1. First, assemble multiple standard segments into a steel arch frame. The camber of the steel arch frame has not been adjusted yet. First, use a total station for lofting to obtain the required camber of the steel arch frame; S2. According to the required camber, calculate the change in the distance between the tops of each standard segment; S3. Start the reduction motor to drive the nut sleeve of the adjusting screw to rotate; S4. Observe the change in the camber of the steel arch frame, adjust the rotation speed and direction of the reduction motor as needed. When the camber of the steel arch frame reaches the required value, stop the reduction motor; S5. Check the stability of the steel arch frame. If necessary, fine-tuning can be carried out.

[0013] The method includes: The method for calculating the distance between the tops of each standard segment is: The total camber requirement is obtained by total station lofting, and the length of each standard segment is L; Let the total camber requirement beδtotal If the number of standard segments is n, then the distance variation Δ between the tops of each standard segment d can be calculated by the following formula:

[0014] The distance variation Δ between the tops d is converted into an electrical signal and sent to the deceleration motor between each standard segment. The deceleration motor drives the nut sleeve to rotate to adjust the distance between the tops of each standard segment, completing the arch degree adjustment of the steel arch frame.

[0015] The present invention provides an adjustable universal steel arch frame adjusting device and its adjusting method. By adding a deceleration motor and an adjusting screw system, automatic and precise adjustment of the connection between standard segments is achieved. The standard segments are connected by adjusting screws at the top, enabling flexible adjustment of the relative positions between segments, while the hinge design at the bottom ensures the stability and adaptability of the structure. The deceleration motor drives the nut sleeve on the adjusting screw to rotate, enabling precise control of the distance between the tops of adjacent standard segments, thereby achieving fine adjustment of the arch degree of the entire steel arch frame. This improved method greatly enhances the convenience and accuracy of on-site construction, is no longer limited by the cumbersome manual adjustment and accuracy issues, thus significantly improving the engineering efficiency and quality, reducing the installation cost, and enhancing the safety and durability of the bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments: Figure 1 is the overall structure diagram of the steel arch frame of the present invention; Figure 2 is the connection schematic diagram of the standard segments of the present invention; Figure 3 is the left view structure diagram of the standard segments connected by adjusting screws of the present invention; Figure 4 is the structure diagram of the adjusting screw of the present invention; Figure 5 is the right view structure diagram of the standard segments connected by adjusting screws of the present invention; Figure 6 is the right view and front view structure diagram of the standard segments connected by adjusting screws of the present invention; Figure 7 is the adjusting structure diagram of the adjusting screw of the present invention.

[0017] In the figure: steel arch frame 1; standard segment 101; adjusting screw 2; left threaded rod 201; right threaded rod 202; nut sleeve 203; synchronous belt 3; rotating sleeve 4; mounting bracket 5; first bevel gear 6; second bevel gear 7; deceleration motor 8; anti-rotation sleeve 9; telescopic rod 10. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Embodiment 1 As Figures 1 to 7 shown, an adjustable universal steel arch support adjusting device. The steel arch support 1 is composed of multiple standard segments 101 connected to form a steel arch bridge structure. The tops between adjacent standard segments 101 are connected by adjusting screws 2, and the bottoms between adjacent standard segments 101 are hinged. A reduction motor 8 is provided on the standard segment 101. The reduction motor 8 drives the nut sleeve 203 of the adjusting screw 2 to rotate. The change in the distance between the tops of adjacent standard segments 101 driven by the nut sleeve 203 can adjust the camber of the entire steel arch support 1. By adding a reduction motor 8 and an adjusting screw 2 system, the automation and precision adjustment of the connection between the standard segments 101 are realized. The standard segments 101 are connected by the adjusting screws 2 at the top, so that the relative positions between the segments can be flexibly adjusted, and the hinged design at the bottom ensures the stability and adaptability of the structure. The reduction motor 8 drives the nut sleeve 203 on the adjusting screw 2 to rotate, so that the distance between the tops of adjacent standard segments 101 can be accurately controlled, and then the fine adjustment of the camber of the entire steel arch support 1 can be realized. This improved method greatly improves the convenience and accuracy of on-site construction, is no longer limited by the tediousness and precision problems of manual adjustment, thus significantly improving the project efficiency and project quality, reducing the installation cost, and enhancing the safety and durability of the bridge structure.

[0019] In a preferred solution, left threaded rods 201 and right threaded rods 202 are threadedly connected to both ends of the nut sleeve 203 of the adjusting screw 2. The left threaded rod 201 and the right threaded rod 202 are respectively hinged to the ends of the standard segments 101 at both ends. A reduction motor 8 is provided below the nut sleeve 203. A second bevel gear 7 is provided at the output end of the reduction motor 8. A first bevel gear 6 is provided on the nut sleeve 203. The first bevel gear 6 meshes with the second bevel gear 7, and the reduction motor 8 drives the nut sleeve 203 to rotate. Both ends of the nut sleeve 203 are hinged to the ends of the adjacent standard segments 101 through the left threaded rod 201 and the right threaded rod 202. Such a design can ensure that when the nut sleeve 203 rotates, it can simultaneously drive the standard segments 101 on both sides to move synchronously and relatively precisely along the screw direction.

[0020] The reduction motor 8 is arranged below the nut sleeve 203, and a second bevel gear 7 is installed at its output end, while a first bevel gear 6 meshing with it is provided on the nut sleeve 203. When the reduction motor 8 operates, it will drive the nut sleeve 203 to rotate through the transmission of the second bevel gear 7 and the first bevel gear 6. In this way, the electric mechanical power is converted into precise linear motion, and then the electrification and precision adjustment of the camber of the steel arch support 1 are realized, greatly improving the construction efficiency and project quality.

[0021] In a preferred embodiment, one end of the outer surface of the nut sleeve 203 is provided with a spline, and the other end of the outer surface is a cylindrical section. A rotating sleeve 4 is sleeved on the cylindrical section. The lower end of the rotating sleeve 4 is connected to the mounting frame 5, and the reduction motor 8 is arranged on the mounting frame 5.

[0022] In a preferred embodiment, one side of the mounting frame 5 is hinged with a telescopic rod 10. An anti-rotation sleeve 9 is arranged at the end of the telescopic rod 10, and the anti-rotation sleeve 9 is sleeved on the inclined rod of the standard section 101.

[0023] In a preferred embodiment, the first bevel gear 6 is sleeved on the spline of the outer surface of the nut sleeve 203. The adjusting screws 2 arranged side by side are connected by a synchronous belt 3. The synchronous belt 3 is sleeved on the spline of the nut sleeve 203, and the convex blocks of the synchronous belt 3 are arc-shaped meshed with the spline. One end of the outer surface of the nut sleeve 203 is provided with a spline structure, and the other end is a cylindrical section. A rotating sleeve 4 is sleeved on the cylindrical section. The lower end of the rotating sleeve 4 is fixedly connected to the mounting frame 5, and the reduction motor 8 is arranged on the mounting frame 5, ensuring the effective transmission of the power source.

[0024] To increase the stability of the overall structure, one side of the mounting frame 5 is connected with a telescopic rod 10 by a hinge. An anti-rotation sleeve 9 is arranged at the end of the telescopic rod 10, and the anti-rotation sleeve 9 is tightly sleeved on the inclined rod of the standard section 101 to prevent the reduction motor 8 from rotating unnecessarily during the adjustment process.

[0025] The bevel gear 6 is sleeved on the outer surface of the nut sleeve 203 with a spline structure, which can ensure the reliable transmission between the bevel gear and the nut sleeve.

[0026] At the same time, for multiple adjusting screws 2 arranged side by side, a synchronous belt 3 is used for linkage control. The synchronous belt 3 is also sleeved on the spline part of the nut sleeve 203, and its convex blocks are arc-shaped meshed with the spline, so as to realize the simultaneous and equal-speed rotation of multiple adjusting screws, ensure the synchronous adjustment of each part of the entire steel arch 1, and improve the integrity and accuracy of the camber adjustment.

[0027] In a preferred embodiment, a controller is further provided, and the controller is electrically connected to multiple reduction motors 8.

[0028] Embodiment 2 Further described in combination with Embodiment 1, as Figures 1 - 7 the shown structure, S1. First, assemble multiple standard sections 101 into the steel arch 1. The camber of the steel arch 1 has not been adjusted yet. First, use a total station for lofting to obtain the required camber of the steel arch 1; S2. According to the required camber, calculate the distance variation between the tops of each standard section 101; S3. Start the reduction motor 8 to drive the nut sleeve 203 of the adjusting screw 2 to rotate; S4. Observe the camber change of the steel arch frame 1, adjust the rotation speed and direction of the reduction motor 8 as needed, and stop the reduction motor 8 when the camber of the steel arch frame 1 reaches the required value; S5. Check the stability of the steel arch frame 1 and make fine adjustments if necessary.

[0029] The method includes: The method for calculating the distance between the tops of each standard segment 101 is as follows: The total camber requirement is obtained by setting out with a total station, and the length of each standard segment is L; Let the total camber requirement be δtotal , the number of standard segments 101 be n, then the distance variation Δ between the tops of each standard segment 101 d can be calculated by the following formula:

[0030] The distance variation Δ between the tops d is converted into an electrical signal and sent to the reduction motor 8 between each standard segment 101. The reduction motor 8 drives the nut sleeve 203 to rotate to adjust the distance between the tops of each standard segment 101, and the camber adjustment of the steel arch frame 1 is completed.

[0031] This formula assumes that the camber change of the arch frame is uniform, that is, each standard segment bears the same camber change. If the camber change is not uniform, then fine adjustments need to be made according to the actual situation.

[0032] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An adjustable universal steel arch support adjusting device, characterized in that: The steel arch frame (1) is composed of multiple standard segments (101) connected to form a steel arch bridge structure. The tops of adjacent standard segments (101) are connected by adjusting screws (2), and the bottoms of adjacent standard segments (101) are hinged. A reduction motor (8) is provided on the standard segment (101). The reduction motor (8) drives the nut sleeve (203) of the adjusting screw (2) to rotate, and the change in the distance between the tops of adjacent standard segments (101) driven by the nut sleeve (203) can adjust the camber of the entire steel arch frame (1).

2. The adjustable universal steel arch support adjusting device according to claim 1, characterized in that: Both ends of the nut sleeve (203) of the adjusting screw (2) are threadedly connected with a left threaded rod (201) and a right threaded rod (202). The left threaded rod (201) and the right threaded rod (202) are respectively hinged to the ends of the standard segments (101) at both ends. A reduction motor (8) is provided below the nut sleeve (203). A second bevel gear (7) is provided at the output end of the reduction motor (8). A first bevel gear (6) is provided on the nut sleeve (203). The first bevel gear (6) meshes with the second bevel gear (7), and the reduction motor (8) drives the nut sleeve (203) to rotate.

3. The adjustable universal steel arch support adjusting device according to claim 2, characterized in that: the nut One end of the outer surface of the sleeve (203) is provided with a spline, and the other end of the outer surface is a cylindrical section. A rotating sleeve (4) is sleeved on the cylindrical section. The lower end of the rotating sleeve (4) is connected to the mounting bracket (5). The reduction motor (8) is arranged on the mounting bracket (5).

4. The adjustable universal steel arch support adjusting device according to claim 3, characterized in that: One side of the mounting bracket (5) is hinged with a telescopic rod (10). An anti-rotation sleeve (9) is provided at the end of the telescopic rod (10). The anti-rotation sleeve (9) is sleeved on the diagonal rod of the standard segment (101).

5. The adjustable universal steel arch support adjusting device according to claim 3, characterized in that: The first bevel gear (6) is sleeved on the spline on the outer surface of the nut sleeve (203). The adjusting screws (2) arranged side by side are connected by a synchronous belt (3). The synchronous belt (3) is sleeved on the spline of the nut sleeve (203). The convex block of the synchronous belt (3) meshes with the spline arc.

6. The adjustable universal steel arch support adjusting device according to claim 1, characterized in that: A controller is also provided. The controller is electrically connected to multiple reduction motors (8).

7. A regulating method for a regulating device of an adjustable universal steel arch support according to any one of claims 1-6, characterized in that: The method includes: S1. First, assemble multiple standard segments (101) into a steel arch frame (1). The camber of the steel arch frame (1) has not been adjusted yet. First, use a total station for lofting to obtain the required camber of the steel arch frame (1). S2. According to the required camber, calculate the change in the distance between the tops of each standard segment (101). S3. Start the reduction motor (8) to drive the nut sleeve (203) of the adjusting screw (2) to rotate. S4. Observe the change in the camber of the steel arch frame (1). According to the need, adjust the rotation speed and direction of the reduction motor (8). When the camber of the steel arch frame (1) reaches the required value, stop the reduction motor (8). S5. Check the stability of the steel arch frame (1). If necessary, fine-tuning can be carried out.

8. The adjustment method of an adjustment device for an adjustable universal steel arch support according to claim 7, characterized in that: The method includes: The calculation method for the distance between the tops of each standard segment (101) is as follows: The total camber requirement is obtained by total station lofting, and the length of each standard segment is L; Assume that the total camber requirement is δtotal , the number of standard segments (101) is n, and the distance variation Δ d between the tops of each standard segment (101) can be calculated by the following formula: Distance variation Δ between the tops d It is converted into an electrical signal and sent to the deceleration motor (8) between each standard segment (101). The deceleration motor (8) drives the nut sleeve (203) to rotate to adjust the distance between the tops of each standard segment (101), completing the camber adjustment of the steel arch frame (1).

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