A deviation rectifying device for steel truss beam incremental launching construction

Abstract

The application discloses a deviation rectifying device for steel truss pushing construction, which comprises a base arranged on both sides of the steel truss and a pushing cam rotatably connected to the base; the base is provided with a driving device for controlling the rotation of the pushing cam and an infrared distance measuring device for measuring the distance between the deviation rectifying device and the steel truss; the pushing cam comprises at least two pushing cam surfaces with different radius values relative to the rotation center of the pushing cam, and the pushing cam surfaces are used for pushing the steel truss; wherein the driving device controls the rotation of the pushing cam according to the distance measured by the infrared distance measuring device, so that the pushing cam surfaces with different radius values push the steel truss; the application can monitor the position deviation of the steel truss in real time, and quickly and accurately adjust the rotation angle and strength of the pushing cam, so as to realize the accurate deviation rectification of the position of the steel truss.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel truss bridge construction, and particularly relates to a deviation rectifying device for steel truss pushing construction. BACKGROUND

[0002] In modern bridge construction, steel truss as an important structural component, its pushing construction technology has become the key means to ensure the construction efficiency and quality. However, with the continuous expansion of the scale and the improvement of the complexity of bridge engineering, steel truss pushing construction is facing a series of new challenges. Especially in the deviation rectifying link, the traditional method often relies on manual operation and simple mechanical device, which not only limits the accuracy of deviation rectifying, but also may lead to low construction efficiency and even safety hazards.

[0003] The traditional steel truss pushing deviation rectifying method mainly relies on manual adjustment or simple mechanical pushing device. These methods not only have slow reaction, are difficult to timely respond to the small deviation of steel truss in the pushing process, but also lack precise control in adjustment force and angle. This may cause the accumulation of large errors in the pushing process of steel truss, and then affect the overall stability and safety of the bridge.

[0004] In addition, the traditional deviation rectifying device is not competent in dealing with complex and changeable construction environment. For example, under different geological conditions, climate conditions and bridge structure characteristics, the deviation of steel truss and the rectifying demand are different. The traditional fixed or single function deviation rectifying device is difficult to meet these diversified demands, thereby limiting the further improvement of construction efficiency and engineering quality.

[0005] More attention should be paid to the fact that the traditional deviation rectifying method has obvious shortcomings in friction control. In the process of steel truss pushing, friction not only increases energy consumption and wear, but also may affect the accuracy and stability of deviation rectifying. Especially in long-distance, large-tonnage pushing construction, the friction problem is particularly prominent, which often becomes the key factor restricting the construction efficiency and equipment service life.

[0006] In summary, the traditional steel truss pushing deviation rectifying method has obvious shortcomings in accuracy, timeliness, adaptability and friction control, and is difficult to meet the high standards and strict requirements of modern bridge construction. Therefore, it is urgent to develop a new deviation rectifying device for steel truss pushing construction to overcome the limitations of the existing technology, improve the efficiency and quality of steel truss pushing construction, and provide strong guarantee for the safe and stable construction of large bridges. SUMMARY

[0007] The present application provides a deviation rectifying device for steel truss pushing construction, comprising:

[0008] a base arranged on both sides of the steel truss and a pushing cam rotatably connected to the base;

[0009] The base is provided with a driving device for controlling rotation of the pushing cam, and an infrared distance measuring device for measuring the distance between the deviation rectifying device and the steel truss, the pushing cam comprises at least two pushing cam surfaces with different radii, the radius is based on the rotation center, and the pushing cam surfaces are used for pushing the steel truss;

[0010] The driving device controls the rotation of the pushing cam according to the distance measured by the infrared distance measuring device, so that the pushing cam surfaces with different radii push the steel truss.

[0011] Further, the pushing cam comprises three pushing cam surfaces with different radii, wherein the radii are 8 cm, 10 cm and 12 cm respectively.

[0012] Further, the driving device comprises a servo motor and a planetary reducer, the rated torque of the servo motor is 3800 N·m to 4500 N·m, and the speed ratio of the planetary reducer is 1:48 to 1:55.

[0013] Further, the driving device is connected with a rotating shaft, the rotating shaft comprises a plurality of support rods, one end of the support rod is connected with the driving device, and the other end is fixedly connected with the pushing cam.

[0014] Further, when the pushing cam rotates to a certain angle, the relationship between the actual pushing distance and the distance measured by the base is: ;

[0015] Wherein, D1 is the distance from the pushing cam to the steel truss, D2 is the measured value of the infrared distance measuring device, r is the current acting radius of the pushing cam, a is the rotation angle of the pushing cam, and d is the horizontal offset of the base to the rotation center of the pushing cam.

[0016] Further, high-viscosity lubricating oil containing molybdenum disulfide is applied on the pushing cam surface.

[0017] Further, the steel truss is slidingly connected to the bridge, a sliding bar is arranged on the bridge, a sliding block corresponding to the sliding bar is arranged at the bottom of the steel truss, and the steel truss is slidingly connected through the sliding bar and the sliding block.

[0018] Further, a pushing jack counterforce frame and a pushing jack are arranged between the steel truss and the bridge.

[0019] Further, the radian of the 8 cm radius section is 0° to 120°, the pushing cam pushes 3.8 to 4.3 mm per 30° rotation, the radian of the 10 cm radius section is 120° to 240°, the pushing cam pushes 6.3 to 6.8 mm per 30° rotation, and the radian of the 12 cm radius section is 240° to 360°, the pushing cam pushes 8 to 8.5 mm per 30° rotation.

[0020] The beneficial effects of the present application are:

[0021] The present application can monitor the position deviation of the steel truss in real time by adopting the pushing camber design with different radius lengths, combining with the intelligent control system and the infrared distance measuring device, and can quickly and accurately adjust the rotation angle and force of the pushing camber, so as to realize the accurate deviation correction of the steel truss position. Through intelligent monitoring and real-time control, the deviation can be intervened in the early stage of the deviation, the accumulation of the deviation is effectively avoided, and the timeliness of the deviation correction is improved.

[0022] The high-viscosity lubricating oil is applied on the pushing camber, and the pushing camber rotation path consistent with the pushing direction is designed, so that the friction loss in the pushing process is significantly reduced, the energy waste and the equipment wear are reduced, and the unnecessary friction and energy consumption are further reduced by accurately controlling the rotation arc length of the pushing camber to approach the pushing distance, so that the efficiency of the whole construction process is improved.

[0023] The radius length of the pushing camber and the control parameters of the driving device can be adjusted and optimized according to different construction environments and requirements, so as to adapt to diversified construction conditions. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application, and do not limit the application in any way.

[0025] In the drawings:

[0026] Figure 1 It is a schematic diagram of the deviation correction device for steel truss pushing construction Figure 1 ;

[0027] Figure 2 It is a schematic diagram of the deviation correction device for steel truss pushing construction Figure 1 ;

[0028] Figure 3 It is a schematic diagram of the deviation correction device for steel truss pushing construction Figure 2 ;

[0029] Figure 4 It is a schematic diagram of the deviation correction device for steel truss pushing construction Figure 3 ;

[0030] Figure 5 It is a schematic diagram of the deviation correction device for steel truss pushing construction Figure 3 ;

[0031] Figure 6 It is a schematic diagram of the deviation correction device for steel truss pushing construction Figure 1 ;

[0032] Figure 7 Schematic diagram of a correction device used in the jacking construction of steel truss girders. Figure 2 ;

[0033] Figure 8 for Figure 7 Cross-sectional view at point MM.

[0034] In the picture:

[0035] 10. Steel truss; 11. Bridge; 12. Sliding bar; 13. Sliding block; 14. Jack reaction frame; 15. Jack;

[0036] Base 20; drive device 21; infrared ranging device 22; push cam 23; rotation center 24; push arc surface 25; rotation shaft 26; support rod 27. Detailed Implementation

[0037] The technical solution of the present invention will now be described with reference to the accompanying drawings. However, the described embodiments are only some embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 8 As shown, the present invention provides a correction device for the jacking construction of steel trusses, including a base 20 disposed on both sides of the steel truss 10 and a jacking cam 23 rotatably connected to the base 20.

[0039] The base 20 is provided with a drive device 21 for controlling the rotation of the push cam 23 and an infrared ranging device 22 for measuring the distance between the correction device and the steel truss 10. The push cam 23 includes at least two push arc surfaces 25 with different radius values. The radius values ​​are based on the rotation center 24 of the push cam 23. The push arc surfaces 25 are used to push the steel truss 10.

[0040] The drive device 21 controls the rotation of the push cam 23 based on the distance measured by the infrared ranging device 22, so that the push arc surface 25 with different radius values ​​pushes the steel truss 10.

[0041] In this embodiment, the base 20 is securely mounted on both sides of the steel truss 10, providing stable support for the jacking cam 23. The design of the base 20 must consider load-bearing capacity and stability to ensure safety during the correction process. The base 20 must be made of high-strength steel to ensure sufficient load-bearing capacity and stability. The installation of the base 20 must be precisely calibrated to ensure its parallelism and perpendicularity to the ground or bridge 11 surface, providing a stable support platform for the jacking cam 23.

[0042] Specifically, the infrared distance measuring device is used to measure the distance between the correction device and the steel truss. The infrared distance measuring device can accurately measure the D2 value in real time, which is the measurement value of the infrared distance measuring device. This measurement value is an important basis for the control of the driving device to rotate the pushing cam. The infrared distance measuring device adopts laser ranging technology, has high precision, high stability, and strong anti-interference ability. The measurement range needs to be adjusted according to the actual size of the steel truss to ensure accurate measurement of the distance between the correction device and the steel truss. The infrared distance measuring device is connected to the intelligent monitoring system to realize real-time transmission and processing of data.

[0043] As shown in Figure 7 In this embodiment, the pushing cam 23 includes three pushing cam surfaces 25 with different radius values. Preferably, the radius values are 8 cm, 10 cm, and 12 cm, respectively, and these pushing cam surfaces 25 are used to push the steel truss to achieve precise adjustment of the position of the steel truss 10.

[0044] Specifically, the radius value of the 8 cm section is 0° to 120°, the pushing cam 23 pushes 3.8 to 4.3 mm per 30° rotation, the radius value of the 10 cm section is 120° to 240°, the pushing cam 23 pushes 6.3 to 6.8 mm per 30° rotation, and the radius value of the 12 cm section is 240° to 360°, the pushing cam 23 pushes 8 to 8.5 mm per 30° rotation. When the pushing cam 23 rotates, the pushing cam surfaces 25 with different radii will be in contact with the steel truss 10 in turn, thereby producing different pushing distances.

[0045] In this embodiment, the pushing cam 23 is made of high-quality alloy steel material and is precisely machined to ensure that the surface roughness and roundness of each pushing cam surface 25 meet the requirements. The three pushing cam surfaces 25 with different radii are precisely machined by numerical control processing to ensure smooth transition and accurate dimensions of each cam surface. The surface of the pushing cam surface 25 is treated specially to improve wear resistance and corrosion resistance, prolonging the service life.

[0046] In other embodiments (not shown in the drawings), the pushing cam is not limited to including three pushing cam surfaces with different radius values, but can also be provided with two, four, five, or any desired number of pushing cam surfaces with different radius values.

[0047] As shown in Figure 8 In this embodiment, the driving device 21 includes a servo motor and a planetary reducer, and the rated torque of the servo motor is 3800 N·m to 4500 N·m, and the speed ratio of the planetary reducer is 1 to 48 to 1 to 55.

[0048] Specifically, the driving device 21 is arranged in the base for controlling the rotation of the pushing cam 23. The driving device includes a servo motor and a planetary reducer. The servo motor has a large rated torque ranging from 3800 N·m to 4500 N·m, which can provide sufficient power to drive the rotation of the pushing cam 23. The planetary reducer has a proper speed ratio ranging from 1 to 48 to 1 to 55 for reducing the rotation speed of the servo motor and increasing the torque to meet the requirements of the rotation of the pushing cam 23. The driving device is connected with the rotating shaft through a high-strength coupling to ensure smooth power transmission and reduce vibration.

[0049] As shown in Figure 6 and Figure 8 In this embodiment, the driving device 21 is connected with a rotating shaft 26, which includes a plurality of support rods 27, one end of which is connected with the driving device 21, and the other end of which is fixedly connected with the pushing cam 23.

[0050] Specifically, the rotating shaft 26 is fixedly connected with the pushing cam 23 for transmitting the power of the driving device. The rotating shaft 26 includes three support rods 27, which can ensure the stability and load-bearing capacity of the rotating shaft. The rotating shaft 26 is fixedly connected with the pushing cam through three high-strength support rods 27 to ensure the stability and load-bearing capacity of the rotation. The support rods 27 are connected with the base 20 through precise bearings to reduce friction and wear and improve rotation efficiency.

[0051] In this embodiment, when the pushing cam 23 rotates to a certain angle, the relationship between the actual pushing distance and the distance measured by the base 20 is as follows: ;

[0052] wherein D1 is the distance from the pushing cam 23 to the steel truss 10, D2 is the measurement value of the infrared distance measuring device 22, r is the current action radius of the pushing cam 23, a is the rotation angle of the pushing cam 23, and d is the horizontal offset of the base 20 to the rotation center 24 of the pushing cam 23. By measuring D2 in real time and controlling the rotation of the pushing cam, the position of the steel truss can be accurately adjusted to realize the deviation correction function.

[0053] Due to installation errors or deformation during construction, the horizontal offset d of the base to the rotation center of the pushing cam may not be zero. In order to compensate for this offset, it can be considered when calculating the actual pushing distance D1. Specifically, the compensation for the horizontal offset can be achieved by adjusting the parameters of the driving device or adding an additional compensation mechanism.

[0054] In this embodiment, in order to reduce friction and wear during pushing and improve the reliability and service life of the deviation correction device, high-viscosity lubricating oil containing molybdenum disulfide is applied on the pushing camber 25, which can reduce friction and wear during pushing and improve the reliability and service life of the deviation correction device.

[0055] As Figures 1 to 5 shown in the embodiment, the steel truss 10 is slidingly connected to the bridge 11, the bridge 11 is provided with a sliding bar 12, and the steel truss 10 is provided with a sliding block 13 corresponding to the sliding bar 12 at the bottom of the steel truss 10, and the steel truss 10 is slidingly connected through the sliding bar 12 and the sliding block 13.

[0056] In the embodiment, in order to facilitate the movement and position adjustment of the steel truss 10 on the bridge 11, the sliding bar 12 can be arranged on the bridge, and the sliding block 13 corresponding to the sliding bar 12 can be arranged at the bottom of the steel truss 10. In this way, the steel truss can be slidingly connected through the sliding bar and the sliding block, facilitating the movement and adjustment during the pushing process. The sliding bar is arranged on the bridge and is made of wear-resistant material to ensure good sliding performance between the sliding bar and the sliding block at the bottom of the steel truss. The sliding block is made of high-strength wear-resistant material and tightly matches the sliding bar to reduce the gap and friction and improve the sliding efficiency.

[0057] As Figures 1 to 5 shown in the embodiment, the steel truss 10 and the bridge 11 are provided with a pushing jack counterforce frame 14 and a pushing jack 15.

[0058] Specifically, the arrangement of the pushing jack counterforce frame 14 and the pushing jack 15 between the steel truss 10 and the bridge 11 can provide the necessary counterforce and support for the pushing of the steel truss 10. These structures can ensure that the steel truss remains stable and does not move or moves according to the predetermined trajectory during the pushing process. The pushing jack counterforce frame is made of high-strength steel and has sufficient carrying capacity and stability. The pushing jack is a high-performance hydraulic cylinder or air cylinder with precise stroke control and pressure output capacity. The arrangement of the pushing jack counterforce frame and the pushing jack between the steel truss and the bridge provides the necessary counterforce and support for the pushing of the steel truss, ensuring the stability and safety of the construction process.

[0059] In the deviation correction process of the present application, the infrared distance measuring device first measures the distance D2 between the deviation correction device and the steel truss. Then, according to the preset deviation correction strategy and target position, the driving device controls the rotation of the pushing cam. When the pushing cam rotates, the pushing cam surfaces with different radii will be in contact with the steel truss in turn, thereby generating different pushing distances. By accurately controlling the rotation angle and speed of the pushing cam, the position of the steel truss can be accurately adjusted.

[0060] In actual operation, the corresponding pushing distance will have a range for each 30° rotation of the pushing cam. As a preferred, when the radius value is 8 cm, the pushing distance is 3.8 to 4.3 mm for each 30° rotation; when the radius value is 10 cm, the pushing distance is 6.3 to 6.8 mm for each 30° rotation; and when the radius value is 12 cm, the pushing distance is 8 to 8.5 mm for each 30° rotation. These ranges are determined according to actual construction experience and material characteristics to ensure the stability and reliability of the correction process.

[0061] In the present embodiment, an intelligent monitoring system is also included, which can monitor the position of the steel truss 10 and the working state of the correction device in real time.

[0062] The intelligent monitoring system can monitor the position of the steel truss and the working state of the correction device in real time. Through sensors and a data acquisition system, the intelligent monitoring system can obtain the position information of the steel truss and various parameters of the correction device in real time, such as the rotation angle and rotation speed of the pushing cam. These information is of great significance for evaluating the correction effect and adjusting the construction strategy.

[0063] The intelligent monitoring system adopts sensor technology and a data acquisition system, which can monitor parameters such as the position, speed, and acceleration of the steel truss in real time. The system has a built-in correction algorithm that can calculate the optimal correction strategy based on real-time data and automatically adjust the parameters of the driving device. The intelligent monitoring system also has a fault warning and alarm function, which can timely discover and handle abnormal situations to ensure the safety of the construction process.

[0064] The operation process of the correction device for steel truss girder pushing construction provided in the present application is as follows:

[0065] 1. Initial calibration: Before the start of construction, the correction device needs to be calibrated to ensure that the installation position and angle of the base, pushing cam, driving device, and other components are accurate. Precise measuring tools are used to calibrate the infrared distance measuring device to ensure the accuracy of the measurement results.

[0066] 2. Real-time measurement and data analysis: During the pushing construction process, the infrared distance measuring device measures the distance D2 between the correction device and the steel truss in real time and transmits the data to the intelligent monitoring system. The intelligent monitoring system analyzes and processes the measurement data and calculates the rotation angle α and rotation speed of the pushing cam according to the preset correction strategy and target position.

[0067] 3. Precise control of the rotation of the pushing cam: The driving device precisely controls the rotation of the pushing cam according to the instructions of the intelligent monitoring system. By adjusting the rotation speed of the servo motor and the speed ratio of the planetary reducer, the pushing cam is smoothly rotated on different radius arcs. During the rotation process, the intelligent monitoring system monitors the rotation angle and rotation speed of the pushing cam in real time to ensure that it matches the preset parameters.

[0068] 4. Precise adjustment of pushing distance: According to the rotation angle α of the pushing cam and the current action radius r, as well as the horizontal offset d of the base to the center of rotation of the pushing cam, the intelligent monitoring system calculates the actual pushing distance D1. By adjusting the parameters of the driving device or adding additional compensation mechanisms, the compensation for the horizontal offset d is realized, ensuring the accuracy of the actual pushing distance.

[0069] 5. Lubrication and protection: High-viscosity lubricating oil containing molybdenum disulfide is applied on the pushing camber to reduce friction and wear, improve the reliability and service life of the deviation correction device. Regular maintenance and maintenance of the pushing cam and driving device are carried out to ensure their good working condition.

[0070] The present application has many use scenarios, including but not limited to the following described scenarios:

[0071] In the construction of a river-crossing bridge, steel truss often needs to cross a wide river, with great difficulty and high risk. The present application can provide precise deviation correction and stable pushing control, ensuring the safety and stability of the steel truss during the pushing process;

[0072] High viaducts in mountainous areas often need to be built on rugged terrain with complex foundation conditions. The deviation correction device of the present application can adapt to various complex foundation conditions, ensuring the accuracy and stability of the steel truss during the pushing process;

[0073] In the construction of urban overpasses, the construction space is limited, and the pushing construction precision of the steel truss is extremely high. The present application can provide real-time monitoring and precise deviation correction function, ensuring the precise pushing of the steel truss in limited space.

Claims

1. A deviation rectifying device for incremental launching of a steel truss girder, characterized in that, The application relates to a steel truss rectification device. The base (20) is provided with a driving device (21) for controlling the rotation of the pushing cam (23) and an infrared distance measuring device (22) for measuring the distance between the rectification device and the steel truss (10), the pushing cam (23) comprises at least two pushing cam surfaces (25) with different radii, the radii are based on the rotation center (24), and the pushing cam surfaces (25) are used for pushing the steel truss (10). The driving device (21) controls the rotation of the pushing cam (23) according to the distance measured by the infrared distance measuring device (22), so that the pushing cam surfaces (25) with different radii push the steel truss (10). The driving device (21) is connected with a rotating shaft (26), the rotating shaft (26) comprises a plurality of supporting rods (27), one end of the supporting rod (27) is connected with the driving device (21), and the other end is fixedly connected with the pushing cam (23). D1 is the distance between the pushing cam (23) and the steel truss (10), D2 is the measurement value of the infrared distance measuring device (22), r is the current acting radius of the pushing cam (23), alpha is the rotation angle of the pushing cam (23), and d is the horizontal offset of the base (20) to the rotation center (24) of the pushing cam (23). When the pushing cam (23) rotates to a certain angle, the relationship between the actual pushing distance and the distance measured by the base (20) is: ; The pushing cam (23) comprises three pushing cam surfaces (25) with different radii, wherein the radii are 8 cm, 10 cm and 12 cm respectively.

2. The deviation rectifying device for incremental launching construction of steel truss girder according to claim 1, characterized in that, The driving device (21) comprises a servo motor and a planetary reducer, the rated torque of the servo motor is 3800 N.m to 4500 N.m, and the speed ratio of the planetary reducer is 1:48 to 1:

55.

3. The deviation rectifying device for incremental launching construction of steel truss girder according to claim 2, characterized in that, High-viscosity lubricating oil containing molybdenum disulfide is applied on the pushing cam surface (25).

4. The deviation rectifying device for incremental launching construction of steel truss girder according to claim 1, characterized in that, The steel truss (10) is slidingly connected on a bridge (11), a sliding strip (12) is arranged on the bridge (11), a sliding block (13) corresponding to the sliding strip (12) is arranged at the bottom of the steel truss (10), and the steel truss (10) is slidingly connected through the sliding strip (12) and the sliding block (13).

5. The deviation rectifying device for incremental launching of steel truss girder according to claim 1, characterized in that, A pushing jack counterforce frame (14) and a pushing jack (15) are arranged between the steel truss (10) and the bridge (11).

6. The deviation rectifying device for incremental launching construction of steel truss girder according to claim 5, characterized in that, The radian of the 8 cm section with the radius value of 8 cm is 0-120 degrees, the pushing cam (23) pushes 3.8-4.3 mm every 30 degrees, the radian of the 10 cm section with the radius value of 10 cm is 120-240 degrees, the pushing cam (23) pushes 6.3-6.8 mm every 30 degrees, and the radian of the 12 cm section with the radius value of 12 cm is 240-360 degrees, the pushing cam (23) pushes 8-8.5 mm every 30 degrees.

7. The deviation rectifying device for incremental launching of steel truss girder according to claim 2, characterized in that, ​

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