An intelligent detection device for dynamic and static loads of bridges

Abstract

The present invention discloses an intelligent detection device for dynamic and static loads on a bridge, comprising two lower support platforms, each having a slide slidably mounted on its upper end, each having an upper support platform slidably mounted on its upper end, each having a No. 1 mounting structure mounted on its upper end, each having an angle adjustment structure mounted on its upper end, the two angle adjustment structures being respectively transmission-connected to the two No. 1 mounting structures, and a No. 2 mounting structure slidably mounted on the opposite surfaces of the two No. 1 mounting structures; two No. 1 strain sensors are fixedly mounted on the No. 1 mounting structure, and a No. 2 strain sensor is fixedly mounted on the No. 2 mounting structure. The present invention can adjust the inclination angles of the No. 1 mounting structure and the No. 2 mounting structure according to the inclination angle of the side surface of the prefabricated box girder, thereby adjusting the installation angles of the No. 1 and No. 2 strain sensors, thereby ensuring that the No. 1 and No. 2 strain sensors are tightly fitted to the side surface of the prefabricated box girder.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge detection, and in particular to an intelligent detection device for dynamic and static loads of a bridge. Background Art

[0002] At present, during the inspection process of bridges, dynamic loads and static loads are generally inspected on the bridge. In the existing process, it is impossible to ensure that the strain sensor fits tightly with the outer wall of the bridge. In order to solve the above problem, the existing technology, publication number CN113215976A, is a bridge inspection device suitable for load detection of the main beam. The strain sensor is installed on the side panel with the same inclination angle as the outer wall of the bridge, so that the side panel is close to the bridge and the strain sensor is attached to the outer wall of the bridge, thereby ensuring that the strain sensor fits tightly with the outer wall of the bridge. However, the above-mentioned existing technology is supported by the vehicle body, which has requirements for the application scenario. When there is no ground suitable for vehicle support under the bridge, the bridge inspection device cannot be used or is inconvenient to use. At the same time, the inclination angle of the side panel is fixed, and the inclination angle of the outer wall of different bridges is not completely consistent, which limits the application of the bridge inspection device. Therefore, we propose an intelligent detection device for dynamic and static loads of bridges. Summary of the Invention

[0003] The main purpose of the present invention is to provide an intelligent detection device for dynamic and static loads of bridges, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A bridge dynamic and static load intelligent detection device is used to detect the stress deformation of a prefabricated box girder when it is subjected to static and dynamic loads. It includes a bridge support for supporting the prefabricated box girder, a No. 1 strain sensor and a No. 2 strain sensor attached to the side wall of the prefabricated box girder to detect the strain of the prefabricated box girder, a PLC controller that plays a control role and can display the detection data of the No. 1 strain sensor and the No. 2 strain sensor, and a No. 1 mounting plate installed on one side of the upper end of the bridge support. The No. 1 mounting plate is located below the prefabricated box girder and is perpendicular to the length direction of the prefabricated box girder. A frame is fixedly installed on the middle part of the upper end of the No. 1 mounting plate. The upper end of the No. 1 mounting plate is located on both sides of the frame and fixedly installed with lower supporting platforms. The upper ends of the two lower supporting platforms are slidably installed with slides. The upper ends of the two slides are slidably installed with upper supporting platforms. The upper ends of the two upper supporting platforms are movably installed with No. 1 mounting structure through shafts. The upper ends of the two slides are installed with angle adjustment structures. The opposite surfaces of the structure are in contact with the two side surfaces of the prefabricated box beam respectively, and the two angle adjustment structures are respectively passed through the two No. 1 mounting structures and are respectively transmission connected to the two No. 1 mounting structures, and No. 2 mounting structures are respectively slidably installed in the middle of the opposite surfaces of the two No. 1 mounting structures; two No. 1 strain sensors are fixedly installed on the No. 1 mounting structure, and the two No. 1 strain sensors are arranged at intervals along the length direction of the prefabricated box beam; No. 2 strain sensor is fixedly installed on the No. 2 mounting structure; No. 2 strain sensor and the two No. 1 strain sensors are distributed in a triangular shape; No. 2 dual-output shaft motor and No. 1 dual-output shaft motor distributed up and down are fixedly installed in the frame, No. 1 screw rods are fixedly installed on the two output ends of the No. 1 dual-output shaft motor, and the two No. 1 screw rods are respectively threadedly connected to the two slides, and No. 2 screw rods are fixedly installed on the two output ends of the No. 2 dual-output shaft motor, and the two No. 2 screw rods are respectively threadedly connected to the two upper support platforms.

[0006] Preferably, a No. 1 support is fixedly installed on both sides of the slide, and a No. 1 connecting shaft is commonly connected between the two No. 1 supports; the angle adjustment structure includes a bracket fixed on the upper end of the slide, an electric hydraulic cylinder is hinged on the upper side of the bracket facing the prefabricated box beam, and a support plate is hinged on the output end of the electric hydraulic cylinder, a top plate is fixed on the support plate facing the end of the prefabricated box beam, and the other end of the support plate is movably sleeved on the No. 1 connecting shaft, and the top plate is in contact with the side of the prefabricated box beam; a No. 1 slide groove is provided in the support plate, and the head and tail of the No. 1 slide groove are arranged along the length direction of the prefabricated box beam and respectively pass through the two side surfaces of the support plate; the support plate is located above the upper support platform.

[0007] Preferably, the No. 1 mounting structure includes a No. 2 mounting plate, the No. 2 mounting plate is located above the upper support platform, and the No. 2 connecting shaft is inserted and connected on one end of the No. 2 mounting plate facing the upper support platform, and the No. 2 connecting shaft is sleeved on both sides of the No. 2 support, and the No. 2 support is fixed on the upper end of the upper support platform; a No. 2 slide groove is provided in the middle of the upper end of the No. 2 mounting plate facing the prefabricated box beam, and the No. 2 slide groove passes through the other end of the No. 2 mounting plate, and a No. 3 slide groove is provided on both side walls of the No. 2 slide groove, and the two No. 3 slide grooves are arranged along the length direction of the prefabricated box beam and respectively pass through both sides of the No. 2 mounting plate, and a No. 4 slide groove is provided on the upper end of the No. 2 mounting plate, and a transmission rod is slidingly arranged in the two No. 3 slide grooves; the two No. 1 strain sensors are fixedly mounted on the upper end of the No. 2 mounting plate facing the prefabricated box beam, and are respectively located on both sides of the No. 4 slide groove.

[0008] Preferably, the No. 4 slide groove is a cross-shaped groove and passes through one end of the No. 2 mounting plate toward the prefabricated box beam and is connected to the No. 2 slide groove; the transmission rod is a rectangular rod, and the transmission rod and the No. 3 slide groove form a planar sliding structure.

[0009] Preferably, the support plate is passed through the No. 2 slide groove, and the support plate and the side wall of the No. 2 slide groove on which the No. 3 slide groove is opened constitute a planar sliding structure, the transmission rod is passed through the No. 1 slide groove, and the transmission rod and the upper and lower side walls of the No. 1 slide groove constitute a planar sliding structure.

[0010] Preferably, the No. 2 mounting structure includes a slider slidably installed in the No. 4 slide groove, a top rod is fixedly provided on the upper end of the slider, a connecting plate is fixedly provided on the upper end of the top rod, connecting bolts are movably provided on both sides of the connecting plate, the two connecting bolts are threadedly installed on the upper end of the No. 2 mounting plate, and springs are movably sleeved on the two connecting bolts, the springs are in contact with the upper end of the No. 2 mounting plate, and the springs are in a compressed state; a transmission column is fixedly provided on the lower end of the slider; the No. 2 strain sensor is fixed on the slider at one end facing the prefabricated box girder.

[0011] Preferably, one end of the slider facing the prefabricated box beam and one end of the second mounting plate facing the prefabricated box beam are on the same plane, and the lower end surface of the transmission column is spherical and contacts with the upper end of the support plate.

[0012] Preferably, the push rod is a stud, a nut is threadedly mounted on the push rod, and the nut contacts the upper end of the second mounting plate; the upper end surface of the slider is located below the upper end surface of the second mounting plate.

[0013] Preferably, the No. 1 strain sensor, the No. 2 strain sensor, the electric hydraulic cylinder, the No. 1 dual-output shaft motor and the No. 2 dual-output shaft motor are all electrically connected to the PLC controller.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By providing the angle adjustment structure, the No. 1 mounting structure, and the No. 2 mounting structure, the inclination angles of the No. 1 mounting structure and the No. 2 mounting structure can be adjusted according to the inclination angle of the side surface of the prefabricated box girder, thereby adjusting the installation angles of the No. 1 strain sensor and the No. 2 strain sensor. This ensures that when the No. 1 strain sensor and the No. 2 strain sensor are fitted to the side surface of the prefabricated box girder, the No. 1 strain sensor and the No. 2 strain sensor are tightly fitted to the side surface of the prefabricated box girder, thereby ensuring the accuracy and validity of the data detected by the No. 1 strain sensor and the No. 2 strain sensor.

[0016] 2. By setting an angle adjustment structure, a No. 1 mounting structure and a No. 2 mounting structure, when the inclination angles of the No. 1 mounting structure and the No. 2 mounting structure are adjusted according to the inclination angle of the side of the prefabricated box beam, the support plate is swung by the electric hydraulic cylinder so that the inclination angle of the top plate is consistent with the inclination angle of the side of the prefabricated box beam, and the No. 1 mounting structure, the No. 2 mounting structure and the angle adjustment structure are linked, so that the No. 1 mounting structure and the No. 2 mounting structure swing with the swing of the angle adjustment structure, and the top plate is perpendicular to the support plate, and the transmission rod is a rectangular rod, so that when the No. 2 mounting plate swings with the swing of the support plate, the No. 2 mounting plate and the slider are always perpendicular to the support plate, that is, by making the top plate and the No. 2 mounting plate swing with the swing of the support plate, the No. 2 mounting plate and the slider are always perpendicular to the support plate. The side surfaces of the prefabricated box girder are parallel, so that the No. 2 mounting plate and the slider are parallel to the side surfaces of the prefabricated box girder, and the detection surfaces of the No. 1 strain sensor and the No. 2 strain sensor are parallel to the side surfaces of the prefabricated box girder, so that the inclination angles of the detection surfaces of the No. 1 strain sensor and the No. 2 strain sensor are easy to adjust, and in the process of moving the No. 1 strain sensor and the No. 2 strain sensor toward the prefabricated box girder and contacting the side surfaces of the prefabricated box girder, the adjusted inclination angles of the detection surfaces of the No. 1 strain sensor and the No. 2 strain sensor will not change, thereby further ensuring that the No. 1 strain sensor and the No. 2 strain sensor can fit tightly on the side surfaces of the prefabricated box girder.

[0017] 3. By setting the angle adjustment structure, the No. 1 installation structure and the No. 2 installation structure, after completing the adjustment of the inclination angle of the detection surface of the No. 1 strain sensor and the No. 2 strain sensor, as the No. 2 dual-output shaft motor drives, the two upper support platforms move closer, so that the No. 1 installation structure moves horizontally toward the prefabricated box girder, and the No. 2 installation structure will move up along the inclined support plate when moving horizontally toward the prefabricated box girder, thereby increasing the height of the triangle formed by the No. 2 strain sensor and the two No. 1 strain sensors, and adjusting the detection range of the No. 2 strain sensor and the two No. 1 strain sensors. In particular, when the inclination angle of the side of the prefabricated box girder is small, the increase in the height of the triangle formed by the No. 2 strain sensor and the two No. 1 strain sensors is greater, so that the No. 2 strain sensor and the two No. 1 strain sensors can better detect the strain of the prefabricated box girder when subjected to static and dynamic loads, and the use effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the relative positions of a bridge dynamic and static load intelligent detection device and a prefabricated box girder according to the present invention;

[0019] Figure 2 This is a partial structural diagram of an intelligent detection device for dynamic and static loads on a bridge according to the present invention;

[0020] Figure 3 Schematic diagram of the No. 1 dual-output shaft motor and the No. 2 dual-output shaft motor;

[0021] Figure 4 It is a structural diagram of the angle adjustment structure;

[0022] Figure 5 This is a structural diagram of the No. 1 installation structure;

[0023] Figure 6 This is a schematic diagram of the structure of the No. 4 chute in the No. 1 installation structure;

[0024] Figure 7 This is a structural diagram of the No. 2 installation structure;

[0025] Figure 8 It is a connection diagram of the angle adjustment structure, the No. 1 mounting structure and the No. 2 mounting structure.

[0026] In the figure: 1. Prefabricated box girder; 2. Bridge support; 3. Mounting plate No. 1; 31. Frame; 32. Dual-output shaft motor No. 1; 321. Screw rod No. 1; 33. Dual-output shaft motor No. 2; 331. Screw rod No. 2; 4. Lower support platform; 5. Slide platform; 6. Upper support platform; 61. Support No. 2; 8. Support No. 1; 9. Connecting shaft No. 1; 10. Angle adjustment structure; 11. Mounting structure No. 1; 12. Mounting structure No. 2; 13. Strain sensor No. 1; 14. Strain sensor No. 2; 101. Bracket; 102. Support plate; 103. Electric hydraulic cylinder; 104. Top plate; 105. Slide No. 1; 111. Mounting plate No. 2; 112. Connecting shaft No. 2; 113. Slide No. 2; 114. Slide No. 3; 115. Transmission rod; 116. Slide No. 4; 121. Slider; 122. Top rod; 123. Connecting plate; 124. Connecting bolt; 125. Spring; 126. Transmission column; 127. Nut. Implementation Method

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0030] like Figure 1-8As shown, an intelligent detection device for dynamic and static loads of a bridge is used to detect the stress and deformation of a prefabricated box girder 1 when subjected to static and dynamic loads. It includes a bridge bracket 2 for supporting the prefabricated box girder 1, a No. 1 strain sensor 13 and a No. 2 strain sensor 14 attached to the side wall of the prefabricated box girder 1 to detect the strain of the prefabricated box girder 1, a PLC controller that plays a control role and can display the detection data of the No. 1 strain sensor 13 and the No. 2 strain sensor 14, and is installed on a No. 1 mounting plate 3 on one side of the upper end of the bridge bracket 2. When applying the intelligent detection device for dynamic and static loads of the bridge to detect stress and deformation when subjected to static and dynamic loads, there are at least two intelligent detection devices for dynamic and static loads of the bridge, which are respectively located on both sides below the prefabricated box girder 1. In a specific embodiment, the intelligent detection device for dynamic and static loads of the bridge is arranged in a pre-built foundation pit, that is, the bridge support 2 is installed in the foundation pit. After the prefabricated box girder 1 is placed on the two bridge support 2, the upper end surface of the prefabricated box girder 1 is flush with the ground, so that the vehicle used to apply static and dynamic loads can directly drive onto the prefabricated box girder 1. This embodiment is suitable for application in prefabricated box At the production site of the beam 1, dynamic and static load tests are performed on the prefabricated box beam 1 before leaving the factory, so that the prefabricated box beam 1 transported to the bridge construction site meets the requirements; and in another specific embodiment, the intelligent detection device for dynamic and static loads of the bridge is not used with the bridge bracket 2, but is directly installed on the elevator through the No. 1 mounting plate 3, and is cooperated with the prefabricated box beam 1 placed on the bridge pier through the lifting of the elevator to perform dynamic and static load tests on the prefabricated box beam 1 after the completion of the bridge construction and before the opening to traffic. Through the above, the application scenarios of the intelligent detection device for dynamic and static loads of the bridge are more varied and more practical. The No. 1 mounting plate 3 is located below the prefabricated box beam 1 and is arranged perpendicular to the length direction of the prefabricated box beam 1. The middle part of the upper end of the No. 1 mounting plate 3 is fixedly installed with a frame 31. The upper end of the No. 1 mounting plate 3 is located on both sides of the frame 31 and fixedly installed with a lower support platform 4. The two lower support platforms 4 are respectively located on both sides of the lower side of the prefabricated box beam 1. The upper ends of the two lower support platforms 4 are slidably installed with a slide 5. The slide 5 and the lower support platform 4 form a bite structure, so that the slide 5 can slide straightly on the lower support platform 4 without being separated from the lower support platform 4 up and down. The upper ends of the two slides 5 are slidably installed with an upper support platform 6. The upper support platform 6 and The slide 5 forms an interlocking structure, so that the upper support platform 6 can slide linearly on the slide 5 without being separated from the slide 5 up and down. The upper ends of the two upper support platforms 6 are both movably installed with a No. 1 mounting structure 11 through an axis. The No. 1 mounting structure 11 can be swung relative to the side of the prefabricated box beam 1 through the axis. The upper ends of the two slides 5 are both installed with an angle adjustment structure 10. The opposite surfaces of the two angle adjustment structures 10 are in contact with the two side surfaces of the prefabricated box beam 1 respectively. After the angle adjustment structure 10 is in contact with the side of the prefabricated box beam 1, the end of the No. 1 mounting structure 11 facing the prefabricated box beam 1 is parallel to the side of the prefabricated box beam 1.The two angle adjustment structures 10 are respectively arranged on the two No. 1 mounting structures 11 and are respectively connected to the two No. 1 mounting structures 11 in a transmission manner. The two angle adjustment structures 10 can respectively adjust the inclination angles of the two No. 1 mounting structures 11 so that the No. 1 mounting structures 11 can adapt to the prefabricated box beams 1 with different side inclination angles. The middle of the opposite surfaces of the two No. 1 mounting structures 11 are respectively slidably installed with No. 2 mounting structures 12; two No. 1 strain sensors 13 are fixedly installed on the No. 1 mounting structure 11, and the two No. 1 strain sensors 13 are spaced apart along the length direction of the prefabricated box beam 1; a No. 2 strain sensor 14 is fixedly installed on the No. 2 mounting structure 12; the No. 2 strain sensor 14 and the two No. 1 strain sensors 13 are divided into a triangle. Cloth; A No. 2 dual-output shaft motor 33 and a No. 1 dual-output shaft motor 32 are fixedly installed in the frame 31, and the two output ends of the No. 1 dual-output shaft motor 32 are fixedly installed with No. 1 screw rods 321. The two No. 1 screw rods 321 are respectively threadedly connected to the two slides 5. The No. 1 dual-output shaft motor 32 drives the two No. 1 screw rods 321 to rotate, so that the two slides 5 can be brought closer to or away from each other. A No. 2 screw rod 331 is fixedly installed on the two output ends of the No. 2 dual-output shaft motor 33. The two No. 2 screw rods 331 are respectively threadedly connected to the two upper support platforms 6. The No. 2 dual-output shaft motor 33 drives the two No. 2 screw rods 331 to rotate, which can drive the two upper support platforms 6 to approach or away from each other.

[0031] As a further explanation of the above technical solution, a No. 1 support 8 is fixedly installed on both sides of the slide 5, and a No. 1 connecting shaft 9 is inserted and connected between the two No. 1 supports 8. The No. 1 connecting shaft 9 is interference fit with the No. 1 support 8, and the central axis direction of the No. 1 connecting shaft 9 is parallel to the length direction of the prefabricated box beam 1; the angle adjustment structure 10 includes a bracket 101 fixed to the upper end of the slide 5, the bracket 101 is located on one side of the No. 1 connecting shaft 9 and away from the prefabricated box beam 1, and an electric hydraulic cylinder 103 is hinged on the upper side of one end of the bracket 101 facing the prefabricated box beam 1, and the electric hydraulic cylinder 103 can swing relative to the bracket 101. The output end of the support plate 102 is hingedly connected. A top plate 104 is fixed to the end of the support plate 102 facing the prefabricated box girder 1. The other end of the support plate 102 is movably sleeved on the No. 1 connecting shaft 9. The output end and extension of the electric hydraulic cylinder 103 can make the support plate 102 swing up and down around the No. 1 connecting shaft 9. That is, when the output end of the electric hydraulic cylinder 103 is extended, the support plate 102 swings down around the No. 1 connecting shaft 9. When the output end of the electric hydraulic cylinder 103 is retracted, the support plate 102 swings up around the No. 1 connecting shaft 9, thereby achieving the up and down swinging of the top plate 104 and adjusting the inclination angle of the top plate 104. The top plate 104 contacts and cooperates with the side surface of the prefabricated box girder 1. A No. 1 chute 105 is provided in the support plate 102. The head and tail of the No. 1 chute 105 are arranged along the length direction of the prefabricated box girder 1 and respectively pass through the two side surfaces of the support plate 102; the support plate 102 is located above the upper support platform 6.

[0032] As a further explanation of the above technical solution, the No. 1 mounting structure 11 includes a No. 2 mounting plate 111, the No. 2 mounting plate 111 is located above the upper support platform 6, and the No. 2 mounting plate 111 is connected to the end of the upper support platform 6 with a No. 2 connecting shaft 112, and both sides of the No. 2 connecting shaft 112 are sleeved with a No. 2 support 61, and the No. 2 support 61 is fixed to the upper end of the upper support platform 6. Specifically, the No. 2 connecting shaft 112 and the No. 2 mounting plate 111 are clearance-fitted, and the No. 2 connecting shaft 112 and the No. 2 support 61 are interference-fitted. The No. 2 mounting plate 111 The second mounting plate 111 can be swung about the second connecting shaft 112 to adjust the inclination angle. A second chute 113 is provided in the middle of the upper end of the second mounting plate 111 facing the precast box girder 1. The second chute 113 runs through the other end of the second mounting plate 111. A third chute 114 is provided on both side walls of the second chute 113. The two third chute 114s are arranged along the length of the precast box girder 1 and run through both sides of the second mounting plate 111. The two third chute 114s and the second chute 113 together form a cross-shaped groove. A fourth chute 116 is provided at the upper end of the second mounting plate 111. The fourth chute 116 is a cross-shaped groove that runs through the upper end of the second mounting plate 111 facing the precast box girder 1 and connects to the second chute 113. A transmission rod 115 is slidingly arranged in the two No. 3 slide grooves 114, and the transmission rod 115 slides up and down along the No. 3 slide groove 114; the two No. 1 strain sensors 13 are fixedly mounted on the upper end of the No. 2 mounting plate 111 facing the prefabricated box beam 1, and are respectively located on both sides of the No. 4 slide groove 116.

[0033] It should be noted that the transmission rod 115 is a rectangular rod, and the transmission rod 115 and the No. 3 slide 114 form a plane sliding structure. The support plate 102 is inserted into the No. 2 slide 113, and the support plate 102 and the side wall of the No. 2 slide 113 with the No. 3 slide 114 formed into a plane sliding structure. The transmission rod 115 is inserted into the No. 1 slide 105, and the transmission rod 115 forms a plane sliding contact with the upper and lower side walls of the No. 1 slide 105. Through the above, when the support plate 102 swings up and down around the No. 1 connecting shaft 9, the inclination angle of the No. 2 mounting plate 111 can be increased or decreased. Specifically, when the support plate 102 swings down around the No. 1 connecting shaft 9, the transmission rod 115 swings down, so that the transmission rod 115 and the No. 3 slide 114 are in contact. The inclination angle of the contacting side increases, thereby pushing the No. 2 mounting plate 111 to swing around the No. 2 connecting shaft 112 toward the side of the prefabricated box beam 1, so that the inclination angle of the No. 2 mounting plate 111 increases. When the support plate 102 swings up around the No. 1 connecting shaft 9, it drives the transmission rod 115 to move up, so that the inclination angle of the side of the transmission rod 115 in contact with the No. 3 slide groove 114 is reduced, thereby pushing the No. 2 mounting plate 111 to swing around the No. 2 connecting shaft 112 away from the side of the prefabricated box beam 1, so that the inclination angle of the No. 2 mounting plate 111 is reduced, thereby realizing the change of the inclination angle of the No. 2 mounting plate 111.

[0034] As a further explanation of the above technical solution, the No. 2 mounting structure 12 includes a slider 121 slidably installed in the No. 4 slide groove 116, and a top rod 122 is fixedly provided on the upper end of the slider 121, and a connecting plate 123 is fixedly provided on the upper end of the top rod 122. Connecting bolts 124 are movably passed through both sides of the connecting plate 123, and the two connecting bolts 124 are threadedly installed on the upper end of the No. 2 mounting plate 111. Springs 125 are movably sleeved on the two connecting bolts 124, and the springs 125 are in contact with the upper end of the No. 2 mounting plate 111, and the springs 125 are in a compressed state; a transmission column 126 is fixedly provided at the lower end of the slider 121; the No. 2 strain sensor 14 is fixed on the slider 121 toward one end of the prefabricated box girder 1. One end of the slider 121 facing the prefabricated box beam 1 and one end of the No. 2 mounting plate 111 facing the prefabricated box beam 1 are on the same plane. The lower end surface of the transmission column 126 is spherical and contacts the upper end of the support plate 102. The transmission column 126 can slide on the support plate 102 and is under the action of the spring 125 in a compressed state. The transmission column 126 fits tightly against the support plate 102 to ensure the stability of the slider 121. By sliding the transmission column 126 along the inclined support plate 102, the upper and lower positions of the slider 121 can be adjusted, thereby adjusting the upper and lower positions of the No. 2 strain sensor 14, thereby adjusting the No. 2 strain sensor The height of the triangle formed by the strain sensor 14 and the two No. 1 strain sensors 13 is adjusted. In particular, when the inclination angle of the side of the prefabricated box girder 1 is small, the inclination angle of the support plate 102 increases. When the transmission column 126 moves toward the prefabricated box girder 1 along the support plate 102, the slider 121 slides up and the sliding distance is larger, so that the height of the triangle formed by the No. 2 strain sensor 14 and the two No. 1 strain sensors 13 can be increased when the inclination angle of the side of the prefabricated box girder 1 is small, so that the No. 2 strain sensor 14 and the two No. 1 strain sensors 13 can better detect the strain of the prefabricated box girder 1 when it is subjected to static and dynamic loads, and the use effect is better.

[0035] By setting the angle adjustment structure 10, the No. 1 mounting structure 11 and the No. 2 mounting structure 12, when it is necessary to adjust the inclination angle of the No. 1 mounting structure 11 and the No. 2 mounting structure 12 according to the inclination angle of the side of the prefabricated box girder 1 so that the No. 1 strain sensor 13 and the No. 2 strain sensor 14 can fit tightly on the side of the prefabricated box girder 1, the electric hydraulic cylinder 103 pushes the support plate 102 to swing, so that the inclination angle of the top plate 104 is consistent with the inclination angle of the side of the prefabricated box girder 1, so that the No. 1 mounting structure 11 and the No. 2 mounting structure 12 are tilted and the inclination angle is consistent with the inclination angle of the side of the prefabricated box girder 1.

[0036] Since the top plate 104 contacts the side of the prefabricated box beam 1 when in use, the top plate 104 is perpendicular to the support plate 102, and the transmission rod 115 is a rectangular rod, so that when the second mounting plate 111 swings with the swing of the support plate 102, the second mounting plate 111 is always perpendicular to the support plate 102, that is, the second mounting plate 111 is always parallel to the top plate 104, so that the second mounting plate 111 can be kept parallel to the side of the prefabricated box beam 1, so that when the second mounting plate 111 is adjusted according to the inclination angle of the side of the prefabricated box beam 1 When the tilt angle is set, it can ensure that the No. 2 mounting plate 111 is parallel to the side of the prefabricated box girder 1, and the slider 121 is parallel to the side of the prefabricated box girder 1, so that the detection surface of the No. 1 strain sensor 13 and the No. 2 strain sensor 14 is parallel to the side of the prefabricated box girder 1, thereby facilitating the No. 1 strain sensor 13 and the No. 2 strain sensor 14 to fit tightly on the side of the prefabricated box girder 1, thereby ensuring the accuracy and validity of the data detected by the No. 1 strain sensor 13 and the No. 2 strain sensor 14.

[0037] It should be noted that strain sensor No. 1 13, strain sensor No. 2 14, electric hydraulic cylinder 103, dual-output shaft motor No. 1 32 and dual-output shaft motor No. 2 33 are all electrically connected to the PLC controller through data lines. The operation of electric hydraulic cylinder 103, dual-output shaft motor No. 1 32 and dual-output shaft motor No. 2 33 is controlled by the PLC controller, and the detection data of strain sensor No. 1 13 and strain sensor No. 2 14 are transmitted to the PLC controller through the data line for processing and display, thereby completing the intelligent detection of dynamic and static loads of the bridge.

[0038] It should be noted that the present invention is an intelligent detection device for dynamic and static loads of a bridge. According to the obtained inclination angle of the side of the prefabricated box girder 1, the electric hydraulic cylinder 103 is controlled by the PLC controller to start, and the support plate 102 is pushed to swing, so that the inclination angle of the top plate 104 is consistent with the inclination angle of the side of the prefabricated box girder 1. Then, the No. 1 dual-output shaft motor 32 and the No. 2 dual-output shaft motor 33 are simultaneously started by the LC controller to bring the two slides 5 closer together, and the two upper support platforms 6 closer together. When the top plate 104 contacts the side of the prefabricated box girder 1, the No. 1 dual-output shaft motor 32 stops, and the No. 2 dual-output shaft motor 33 continues to run, so that the two upper support platforms 6 continue to move closer together, thereby pushing the two No. 1 mounting structures 11 to continue to move closer together, and the two No. 1 mounting structures 1 1 slides along a straight line, and the No. 2 mounting structure 12 moves upward along the inclined support plate 102 while moving toward the prefabricated box girder 1, thereby increasing the height of the triangle formed by the No. 2 strain sensor 14 and the two No. 1 strain sensors 13. When the No. 2 strain sensor 14 and the two No. 1 strain sensors 13 are in contact with the side of the prefabricated box girder 1, the No. 2 dual-output shaft motor 33 stops. Then, static and dynamic loads are applied to the prefabricated box girder 1. Under the action of the static and dynamic loads, the prefabricated box girder 1 undergoes stress and deformation. The No. 2 strain sensor 14 and the two No. 1 strain sensors 13 detect the stress and deformation of the prefabricated box girder 1 and transmit the detected data to the PLC controller via a data line for processing and display, thereby completing the stress and deformation detection of the prefabricated box girder 1 under static and dynamic loads.

[0039] It should be noted that, while the No. 2 dual-output shaft motor 33 continues to move the two upper support platforms 6 closer together, the No. 2 mounting plate 111 moves horizontally and linearly toward the prefabricated box girder 1, and the transmission rod 115 slides along the No. 1 slide groove 105 toward the prefabricated box girder 1 and moves upward, so that the transmission rod 115 slides upward in the No. 3 slide groove 114, and the transmission rod 115 does not swing, thereby ensuring that the inclination angle of the No. 2 mounting plate 111 remains unchanged during the process of moving toward the prefabricated box girder 1, thereby ensuring that the inclination angle of the detection surface of the No. 1 strain sensor 13 and the No. 2 strain sensor 14 does not change during the process of moving the No. 1 strain sensor 13 and the No. 2 strain sensor 14 toward the prefabricated box girder 1 and contacting the side of the prefabricated box girder 1.

[0040] In another embodiment, the push rod 122 is a stud, and a nut 127 is threadedly installed on the push rod 122. The nut 127 contacts the upper end of the second mounting plate 111; the upper end surface of the slider 121 is located below the upper end surface of the second mounting plate 111. By rotating the nut 127, the push rod 122 moves up, thereby moving the slider 121, the connecting plate 123 and the transmission column 126 up, so that the transmission column 126 can be disengaged from the support plate 102, so that the spring 125 is further compressed. Then, the reaction of the compressed spring 125 causes the nut 127 to fit tightly against the upper end of the second mounting plate 111. Thereby, the No. 2 mounting structure 12 is moved up to a certain height and maintained at the new height position, and the height of the No. 2 mounting structure 12 will not change during the process of moving the No. 2 mounting structure 12 toward the prefabricated box girder 1, so that the height of the triangle formed by the No. 2 strain sensor 14 and the two No. 1 strain sensors 13 will not change during the process of moving toward the prefabricated box girder 1. By rotating the nut 127, the height of the triangle formed by the No. 2 strain sensor 14 and the two No. 1 strain sensors 13 can be changed in advance, and the detection range of the No. 2 strain sensor 14 and the two No. 1 strain sensors 13 can be changed in advance, which is more practical.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent detection device for dynamic and static loads of a bridge, used for detecting stress deformation of a prefabricated box girder (1) when subjected to static and dynamic loads, comprising a bridge support (2) for supporting the prefabricated box girder (1), a No. 1 strain sensor (13) and a No. 2 strain sensor (14) attached to the side wall of the prefabricated box girder (1) for detecting the strain of the prefabricated box girder (1), a PLC controller that plays a control role and can display the detection data of the No. 1 strain sensor (13) and the No. 2 strain sensor (14), and a No. 1 mounting plate (3) installed on one side of the upper end of the bridge support (2), characterized in that: The No. 1 mounting plate (3) is located below the prefabricated box beam (1) and is arranged perpendicular to the length direction of the prefabricated box beam (1). The middle part of the upper end of the No. 1 mounting plate (3) is fixedly installed with a frame (31). The upper end of the No. 1 mounting plate (3) is located on both sides of the frame (31) and is fixedly installed with a lower support platform (4). The upper ends of the two lower support platforms (4) are slidably installed with a slide platform (5). The upper ends of the two slide platforms (5) are slidably installed with an upper support platform (6). The upper ends of the two upper support platforms (6) are movably installed with a No. 1 mounting structure (11) through an axis. The upper ends of the two slide platforms (5) are installed with an angle adjustment structure (10). The opposite surfaces of the two angle adjustment structures (10) are respectively in contact with the two side surfaces of the prefabricated box beam (1). The two angle adjustment structures (10) are respectively passed through the two No. 1 mounting structures (11) and are respectively connected to the two No. 1 mounting structures (11). The middle parts of the opposite surfaces of the two No. 1 mounting structures (11) are respectively slidable. A No. 2 mounting structure (12) is installed; two No. 1 strain sensors (13) are fixedly installed on the No. 1 mounting structure (11), and the two No. 1 strain sensors (13) are spaced apart along the length direction of the prefabricated box beam (1); a No. 2 strain sensor (14) is fixedly installed on the No. 2 mounting structure (12); the No. 2 strain sensor (14) and the two No. 1 strain sensors (13) are distributed in a triangle; a No. 2 dual-output shaft motor (33) and a No. 1 dual-output shaft motor (32) are fixedly installed in the frame (31), and the two output ends of the No. 1 dual-output shaft motor (32) are fixedly installed with a No. 1 screw rod (321), and the two No. 1 screw rods (321) are respectively threadedly connected to the two slides (5); a No. 2 screw rod (331) is fixedly installed on the two output ends of the No. 2 dual-output shaft motor (33), and the two No. 2 screw rods (331) are respectively threadedly connected to the two upper support platforms (6); The No. 1 mounting structure (11) includes a No. 2 mounting plate (111), the No. 2 mounting plate (111) is located above the upper support platform (6), and the No. 2 connecting shaft (112) is inserted and connected to one end of the No. 2 mounting plate (111) facing the upper support platform (6), and the No. 2 connecting shaft (112) is sleeved with a No. 2 support (61) on both sides, and the No. 2 support (61) is fixed to the upper end of the upper support platform (6); the No. 2 mounting plate (111) is provided with a No. 2 chute (113) in the middle of one end facing the prefabricated box beam (1), and the No. 2 chute (113) passes through the other end of the No. 2 mounting plate (111). The second chute (113) is provided with a third chute (114) on both side walls, and the two third chute (114) are arranged along the length direction of the prefabricated box beam (1) and respectively pass through both sides of the second mounting plate (111). The upper end of the second mounting plate (111) is provided with a fourth chute (116), and a transmission rod (115) is provided in the two third chute (114) for sliding together. The two first strain sensors (13) are fixedly mounted on the upper end of the second mounting plate (111) toward one end of the prefabricated box beam (1), and are respectively located on both sides of the fourth chute (116); A No. 1 support (8) is fixedly installed on both sides of the slide (5), and a No. 1 connecting shaft (9) is interlaced between the two No. 1 supports (8); the angle adjustment structure (10) includes a bracket (101) fixed to the upper end of the slide (5), an electric hydraulic cylinder (103) is hingedly connected to the upper side of one end of the bracket (101) facing the prefabricated box beam (1), and the output end of the electric hydraulic cylinder (103) is hingedly connected to a support plate (102), and the support plate (102) is hingedly connected to the upper side of the prefabricated box beam (1). A top plate (104) is fixed to one end of the prefabricated box beam (1), and the other end of the support plate (102) is movably sleeved on a No. 1 connecting shaft (9), and the top plate (104) is in contact with and cooperates with the side surface of the prefabricated box beam (1); a No. 1 slide groove (105) is provided in the support plate (102), and the head and tail of the No. 1 slide groove (105) are arranged along the length direction of the prefabricated box beam (1) and respectively pass through the two side surfaces of the support plate (102); the support plate (102) is located above the upper support platform (6).

2. The intelligent bridge dynamic and static load detection device according to claim 1 is characterized by: The fourth chute (116) is a cross-shaped chute and passes through one end of the second mounting plate (111) toward the prefabricated box beam (1) and is connected to the second chute (113); the transmission rod (115) is a rectangular rod, and the transmission rod (115) and the third chute (114) form a planar sliding structure.

3. The intelligent bridge dynamic and static load detection device according to claim 2, characterized in that: The support plate (102) is inserted into the No. 2 chute (113), and the support plate (102) and the side wall of the No. 2 chute (113) on which the No. 3 chute (114) is opened constitute a plane sliding structure. The transmission rod (115) is inserted into the No. 1 chute (105), and the transmission rod (115) and the upper and lower side walls of the No. 1 chute (105) constitute a plane sliding structure.

4. The intelligent bridge dynamic and static load detection device according to claim 1 is characterized by: The second mounting structure (12) includes a slider (121) slidably mounted in the fourth slide groove (116), the upper end of the slider (121) is fixedly provided with a push rod (122), the upper end of the push rod (122) is fixedly provided with a connecting plate (123), both sides of the connecting plate (123) are movably provided with connecting bolts (124), the two connecting bolts (124) are threadedly mounted on the upper end of the second mounting plate (111), and the two connecting bolts (124) are movably sleeved with springs (125), the springs (125) are in contact with the upper end of the second mounting plate (111), and the springs (125) are in a compressed state; the lower end of the slider (121) is fixedly provided with a transmission column (126); the second strain sensor (14) is fixed on the slider (121) toward one end of the prefabricated box beam (1).

5. The intelligent bridge dynamic and static load detection device according to claim 4 is characterized in that: One end of the slider (121) facing the prefabricated box beam (1) and one end of the second mounting plate (111) facing the prefabricated box beam (1) are on the same plane, and the lower end surface of the transmission column (126) is spherical and contacts and cooperates with the upper end of the support plate (102).

6. The intelligent bridge dynamic and static load detection device according to claim 4 is characterized in that: The push rod (122) is a stud, and a nut (127) is threadedly mounted on the push rod (122), and the nut (127) contacts the upper end of the second mounting plate (111); the upper end surface of the slider (121) is located below the upper end surface of the second mounting plate (111).

7. The intelligent bridge dynamic and static load detection device according to claim 1 is characterized by: The first strain sensor (13), the second strain sensor (14), the electric hydraulic cylinder (103), the first dual-output shaft motor (32) and the second dual-output shaft motor (33) are all electrically connected to the PLC controller.

Images