Detection system for bridge expansion device

Abstract

The utility model provides a detection system used for a bridge expansion device, and relates to the field of bridge expansion device detection, the bridge expansion device is commonly known as an expansion joint in engineering, the system comprises a bearing system and a loading system, the bearing system comprises a fixed beam and a movable beam which are oppositely arranged, and the loading system comprises a movable beam and a movable beam. Wherein the fixed beam and the movable beam are both parallel to the length direction of the expansion joint to be detected, a guide beam is arranged between the fixed beam and the movable beam, the movable beam is arranged on the guide beam in a sliding mode, and the guide beam is perpendicular to the length direction of the expansion joint to be detected; the loading system comprises a vertical jacking oil cylinder, a transverse loading oil cylinder and a telescopic loading oil cylinder, the output end of the vertical jacking oil cylinder is in transmission connection with the bottom of the fixed beam, and the output end of the transverse loading oil cylinder is in transmission connection with the beam end of the fixed beam in the length direction; and the output end of the telescopic loading oil cylinder is movably connected with the side wall of the movable beam through a movable connecting mechanism. According to the system, the multi-dimensional detection problem of the bridge expansion device in a complex application scene is solved.

Description

Technical Field

[0001] The utility model relates to the field of bridge expansion device detection, in particular to a detection system for bridge expansion devices. Background Art

[0002] Bridge expansion joints, commonly known as expansion joints in engineering, are a crucial component of bridges. To meet the requirements for bridge deck deformation, they are typically installed between beam ends, between beam ends and abutments, or at hinged joints. With the continuous advancement of bridge construction technology and design concepts, the types and spans of bridges are changing rapidly, and the stresses and operating modes of various bridge components and structures are becoming increasingly diverse. Consequently, the use scenarios of bridge expansion joints are becoming more complex. Existing bridge expansion joint detection systems have a single detection scenario and can no longer fully meet actual engineering needs. They cannot specifically verify the directional misalignment, joint width deformation, and stress conditions of bridge expansion joints, either in whole or in part. This results in a lack of testing for complex application scenarios of bridge expansion joints. Utility Model Content

[0003] The purpose of this utility model is to provide a detection system for bridge expansion devices, which solves the multi-dimensional detection problem of bridge expansion devices in complex application scenarios. In order to achieve the above purpose, the technical solutions adopted by this utility model are as follows:

[0004] A detection system for a bridge expansion device, comprising: a bearing system and a loading system, the bearing system comprising a fixed beam and a movable beam arranged relatively to each other, wherein the fixed beam and the movable beam are both parallel to the length direction of the expansion joint to be detected, a guide beam is arranged between the fixed beam and the movable beam, the movable beam is slidably arranged on the guide beam, and the guide beam is perpendicular to the length direction of the expansion joint to be detected; the loading system comprises a vertical lifting cylinder, a transverse loading cylinder and a telescopic loading cylinder, the output end of the vertical lifting cylinder is transmission-connected to the bottom of the fixed beam, the output end of the transverse loading cylinder is transmission-connected to the beam end in the length direction of the fixed beam, and the output end of the telescopic loading cylinder is movably connected to the side wall of the movable beam via a movable connection mechanism.

[0005] In this system, in order to clarify the specific structure of the movable connection mechanism, the movable connection mechanism is a universal joint or a hinge.

[0006] In order to protect the sliding surface of the guide beam and prevent foreign matter or dust from entering the guide beam during operation, a retractable dust cover is provided on the outer side of the guide beam.

[0007] In order to stably clamp the expansion joint to be detected and ensure stable operation of the detection device, the fixed beam and the movable beam are respectively provided with a clamp assembly for fixing the end of the expansion joint to be detected in the expansion direction.

[0008] Preferably, the clamp assembly comprises a displacement box clamp assembly and a spring box clamp assembly, and the displacement box clamp assembly and the spring box clamp assembly are staggered in the length direction of the expansion joint.

[0009] When multiple telescopic loading cylinders are used and are loaded asynchronously, a rotating structure is provided between the movable beam and the guide beam. The rotating structure includes a rotating shaft and a rotating hole. The movable beam is slidably mounted on the guide beam via a sliding structure. The sliding structure includes a mounting base, with one of the rotating shaft and the rotating hole being mounted on the movable beam and the other on the mounting base. In this structure, the movable beam rotates by a preset angle via the rotating structure.

[0010] In order to prevent the movable beam from tipping over during the sliding and rotating process of the movable beam, the sliding structure further includes an L-shaped limiting member, and the L-shaped limiting member is fixedly connected to the mounting base.

[0011] In this system, in order to reduce the friction between the mounting base and the guide beam, a friction reducing plate is provided between the mounting base and the guide beam. The friction reducing plate is preferably made of polytetrafluoroethylene.

[0012] In this system, in order to provide real-time feedback on the pressure changes of the expansion joint to be detected, a plurality of pressure sensors are provided on the fixed beam and / or movable beam, and the pressure sensors are used to provide real-time feedback on the pressure changes of the expansion joint to be detected.

[0013] To facilitate horizontal friction data collection in this system, a sensor set for horizontal friction testing is installed on the telescopic loading cylinder. This sensor set includes a tension sensor, a pressure sensor, and a displacement sensor. A horizontal friction curve can then be fitted based on the tension, pressure, and displacement sensor data.

[0014] The beneficial effects of the utility model are:

[0015] The system is provided with a bearing system and a loading system. The bearing system includes a fixed beam and a movable beam arranged relatively to each other, a guide beam is arranged between the fixed beam and the movable beam, and the movable beam is slidably arranged on the guide beam; the loading system includes a vertical lifting cylinder, a transverse loading cylinder and a telescopic loading cylinder. Through the multiple combinations of the bearing system and the loading system, the system can simulate the mechanical properties of the expansion joint to be tested in complex scenarios such as tensile deformation, compression deformation, transverse dislocation, longitudinal dislocation and vertical dislocation, and realize multi-dimensional detection of the bridge expansion device in complex application scenarios.

[0016] Other features and advantages of the present invention will be described in the following description, and some of them will become obvious from the description or be understood by practicing the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of the overall structure of this detection device;

[0019] Figure 2 A schematic diagram of a structure in which a dust cover is provided for the guide beam;

[0020] Figure 3 It is a schematic diagram of the transmission connection between the vertical lifting cylinder and the fixed beam;

[0021] Figure 4 Schematic diagram of the location of the expansion joint to be tested;

[0022] Figure 5 Based on Figure 1 Schematic diagram of the KK rotation cross-section structure;

[0023] Figure 6 It is the structural diagram of the displacement box fixture;

[0024] Figure 7 It is the structural diagram of the spring box clamp;

[0025] Figure 8 This is a schematic diagram of the overall structure of the system when the swing arm drives the wheel assembly to swing a preset angle;

[0026] Figure 9 Based on Figure 8 A schematic diagram of a partial enlarged structure of the area below the carrier;

[0027] Figure 10 Schematic diagram of the overall structure of the system when the swing arm does not drive the wheel assembly to swing;

[0028] Figure 11 Based on Figure 10 A schematic diagram of a partial enlarged structure of the area below the carrier;

[0029] Figure 12 It is a structural diagram of the limit clamping member;

[0030] Markings in the figure:

[0031] 1. Carrying frame; 20. Wheel; 21. Driving motor; 3. Expansion joint to be tested; 41. Base member; 42. Swing arm; 43. Driving telescopic member; 5. Vertical load assembly; 6. Driving system; 71. Limit clamping member; 72. Synchronous motor; 81. Fixed beam; 82. Movable beam; 83. Guide beam; 84. Universal joint; 830. Dust cover; 91. Vertical lifting cylinder; 92. Lateral loading cylinder; 93. Telescopic loading cylinder; 101. Mounting base; 102. L-shaped limit member; 103. Rotating shaft; 104. Rotating hole; 105. Friction reducing plate; 111. Displacement box; 112. Support base; 121. Spring box; 122. Cushion. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0033] like Figures 1 to 3 As shown, a detection system for a bridge expansion device includes: a bearing system and a loading system, the bearing system includes a fixed beam 81 and a movable beam 82 arranged relatively to each other, wherein the fixed beam 81 and the movable beam 82 are both parallel to the length direction of the expansion joint 3 to be detected, and a guide beam 83 is arranged between the fixed beam 81 and the movable beam 82, and the movable beam 82 is slidably arranged on the guide beam 83, and the guide beam 83 is perpendicular to the length direction of the expansion joint 3 to be detected; the loading system includes a vertical lifting cylinder 91, a transverse loading cylinder 92 and a telescopic loading cylinder 93, the output end of the vertical lifting cylinder 91 is transmission-connected to the bottom of the fixed beam 81, the output end of the transverse loading cylinder 92 is transmission-connected to the beam end of the fixed beam 81 in the length direction, and the output end of the telescopic loading cylinder 93 is movably connected to the side wall of the movable beam 82 through a movable connection mechanism.

[0034] To avoid lags or sudden changes in hydraulic system pressure and flow when all cylinders operate simultaneously, which could impact cylinder response speed, the loading system employs an optimized "one cylinder, one station" configuration. The control unit accordingly adopts distributed control. This ensures zero crosstalk in the hydraulic circuits and precise motion control even under multi-cylinder, long-stroke conditions. Within a loading system, two telescopic loading cylinders 93, one lateral loading cylinder 92, and three vertical lifting cylinders 91 form a loading unit.

[0035] like Figure 4As shown, the expansion joint 3 to be tested is arranged on a carrying system, and the carrying system is used to carry the expansion joint 3 to be tested. There can be multiple carrying systems, and they are arranged along the length direction of the expansion joint.

[0036] The expansion joints 3 to be inspected with the same number of joints can be simultaneously arranged on different bearing systems.

[0037] Due to the different designs of the equipment size, cylinder stroke, and the spacing between the fixed beam 81 and the movable beam 82, the expansion joints 3 to be detected with different numbers of joints can be set in different bearing systems respectively, such as: setting the bearing system to a large bearing system and a large bearing system, the detection range in the large bearing system is 19-33 joints, and the detection range in the small bearing system is 2-18 joints. At this time, the present detection system can select different bearing systems according to the different adaptability of the number of joints within the same time period, for example, 13 joints and 17 joints can be detected at the same time in the small bearing system, and 22 joints and 24 joints can be detected at the same time in the large bearing system.

[0038] The following is an example of the detection content of this detection device:

[0039] ① When multiple telescopic loading cylinders 93 are stretched and compressed synchronously, the tensile deformation and compressive deformation of the expansion joint 3 to be tested are detected;

[0040] Operation method: Determine the total width of the expansion joint 3 to be tested and the initial value of the width of each gap; then, multiple telescopic loading cylinders 93 are stretched and compressed synchronously; after pre-tensioning and pre-pressing back and forth, read the force value, and measure the total width of the two ends of the expansion joint 3 to be tested and the change value of the width of each gap, and determine the relevant data of tensile deformation and compressive deformation.

[0041] ②. Multiple telescopic loading cylinders 93 are asynchronously loaded to detect the longitudinal misalignment of the expansion joint 3 to be tested;

[0042] Operation method: Determine the total width of the expansion joint 3 to be tested and the initial value of the width of each gap; then, multiple telescopic loading cylinders 93 are asynchronously loaded to measure the total width of the two ends of the expansion joint 3 to be tested and the change value of the width of each gap, and determine the longitudinal misalignment related data of the expansion joint 3 to be tested.

[0043] ③. Single or multiple transverse loading cylinders 92 detect the transverse misalignment of the expansion joint 3 to be tested during tension or compression;

[0044] Operation method: Determine the total width of the expansion joint 3 to be tested and the initial value of the width of each gap; then, the single transverse loading cylinder 92 starts to apply force in stages; after pre-tensioning and pre-pressing back and forth, read the force value, and measure the total width of the two ends of the expansion joint 3 to be tested and the change value of the width of each gap, and determine the relevant data of the transverse misalignment of the expansion joint 3 to be tested.

[0045] ④. When multiple vertical lifting cylinders 91 are lifted synchronously, the vertical misalignment of the expansion joint 3 to be tested and the height deviation between the beam steels are detected;

[0046] Operation method: Determine the total width of the expansion joint 3 to be tested and the initial value of the width of each gap; then, multiple vertical jacking cylinders 91 are jacked up synchronously; measure the total width of the two ends of the expansion joint 3 to be tested and the change value of the width of each gap, and determine the vertical misalignment of the expansion joint 3 to be tested and the height deviation related data between the beam steels.

[0047] The above detection contents can be combined at the same time according to the detection scene of the expansion joint 3 to be detected, such as: detection content ① and detection content ④ are combined at the same time to realize deformation detection when the telescopic loading cylinder 93 and the vertical jacking cylinder 91 are working at the same time; in addition, they can also be combined at different times according to the detection scene of the expansion joint 3 to be detected, such as: after the detection content ② is completed, the detection contents ①, ③, and ④ are performed in sequence according to different time periods to complete the detection of tensile deformation, compression deformation, lateral dislocation and vertical dislocation of the expansion joint 3 to be detected in the case of longitudinal dislocation.

[0048] It can be seen that through the various combinations of the bearing system and the loading system in this system, it is possible to simulate the mechanical properties of the expansion joint to be tested in complex scenarios such as tensile deformation, compression deformation, lateral dislocation, longitudinal dislocation and vertical dislocation, and realize multi-dimensional detection of expansion joints in complex application scenarios.

[0049] like Figure 2 As shown, in order to protect the outer side of the guide beam 83 from dust, a retractable dust cover 830 is provided on the outer side of the guide beam 83 to prevent impurities or dust from entering the sliding surface of the guide beam 83.

[0050] The output end of the telescopic loading cylinder 93 is movably connected to the sidewall of the movable beam 82 via an articulating mechanism. This articulating mechanism not only enables forward and backward telescopic movement of the movable beam 82, but also allows it to rotate within a preset angle when longitudinally misaligned. In this system, to clarify the specific structure of the articulating mechanism, it can be a universal joint 84 or a hinge. The universal joint 84 or hinge ensures smooth and accurate power transmission, reducing the adverse additional forces between components caused by motion interference.

[0051] When there are multiple telescopic loading cylinders and the multiple telescopic loading cylinders are asynchronously loaded, a rotating structure is provided between the movable beam 82 and the guide beam 83. Figure 5As shown, the rotating structure includes a rotating shaft 103 and a rotating hole 104, and the movable beam 82 is slidably set on the guide beam 83 through a sliding structure. The sliding structure includes a mounting base 101, and one of the rotating shaft 103 and the rotating hole 104 is set on the movable beam 82, and the other is set on the mounting base 101.

[0052] In this system, the introduction of a rotating mechanism enables detection of longitudinal misalignment of the expansion joint 3 to be inspected. Specifically, multiple telescopic loading cylinders are asynchronously loaded. Due to the different tensile and compressive strokes of these cylinders, they cause the movable beam 82 to rotate by an angle of 0° to 3°. Driven by the telescopic loading cylinders 93, the movable beam 82 can translate forward and backward, and can also partially rotate through the interaction of the telescopic loading cylinders 93 and the rotating mechanism.

[0053] In order to prevent the movable beam 82 from tipping over during the sliding and rotating process, the sliding structure further includes an L-shaped limiter 102 , which is fixedly connected to the mounting base 101 .

[0054] In this system, to reduce the friction between the mounting base and the guide beam, a friction reducing plate 105 is provided between the mounting base 101 and the guide beam 83. The friction reducing plate is preferably made of polytetrafluoroethylene. Furthermore, silicone grease may be applied to the sliding surface.

[0055] In order to stably clamp the expansion joint 3 to be inspected and ensure stable operation of the detection device, the fixed beam 81 and the movable beam 82 are respectively provided with clamp assemblies for fixing the ends of the expansion joint 3 to be inspected in the expansion direction.

[0056] Preferably, the clamp assembly includes a displacement box clamp assembly and a spring box clamp assembly. The displacement box clamp assembly and the spring box clamp assembly can be fixed with T-shaped bolts. T-shaped fixing slots are provided on the fixed beam 81 and the movable beam 82, respectively. The T-shaped bolts cooperate with the T-shaped fixing slots. This structure is more effective, stable, and provides the most direct force. The T-shaped slots can be provided along the entire length of the expansion joint 3 to facilitate securing the T-shaped bolts throughout the entire length. The bolts can be slid within the T-shaped slots to a desired position for securement, regardless of their location, thereby enhancing the practicality of the clamp.

[0057] The displacement box clamp assembly and the spring box clamp assembly are staggered in the length direction of the expansion joint, avoiding a single clamping connection only on the weak side beam or the displacement box which is easy to fix but not subject to much force. The cooperation between the displacement box and the spring box ensures stable clamping of the expansion joint 3 to be tested.

[0058] The following describes the structure by taking the example of a fixture assembly provided on the movable beam 82:

[0059] like Figure 6 As shown, a displacement box 111 is fixedly connected to the movable beam 82 via the displacement box clamp assembly. The displacement box 111 is a component of the bridge expansion and contraction device 3 to be inspected. The displacement box 111 is perpendicular to the seam length of the bridge expansion and contraction device 3 to be inspected, and the displacement box 111 slides with the support base 112 provided within the bridge expansion and contraction device 3 to accommodate changes in seam width.

[0060] The spring box 121 is fixedly connected to the movable beam 82 through the spring box clamp assembly, and the line connecting the spring boxes 121 on both sides is perpendicular to the length direction of the expansion joint 3 to be tested.

[0061] like Figure 7 As shown, in order to compensate the height of the spring box 121 and ensure stable clamping of the spring box 121, a cushion 122 is provided between the spring box 121 and the movable beam 82, and one end of the spring box 121 is fixedly connected to the expansion joint 3 to be detected.

[0062] In this system, in order to provide real-time feedback on the pressure changes of the expansion joint to be detected, a plurality of pressure sensors are provided on the fixed beam 81 and / or the movable beam 82 , and the pressure sensors are used to provide real-time feedback on the pressure changes of the expansion joint to be detected 3 .

[0063] To facilitate horizontal friction data collection within this system, a sensor set for horizontal friction testing is installed on the telescopic loading cylinder 93. This sensor set includes a tension sensor, a pressure sensor, and a displacement sensor. A horizontal friction curve can then be fitted based on the tension, pressure, and displacement sensor data. This system can perform horizontal friction testing at any tension or compression position, displaying the maximum / minimum horizontal friction in real time and deriving the maximum static friction. This allows for the determination of horizontal friction, maximum static friction, and maximum / minimum friction curves for the expansion joint 3 under different tension or compression positions.

[0064] In existing expansion joint testing, regarding vehicle load loading, what is currently simulated is the static friction state between the wheel and the expansion joint under normal driving conditions, and the effect of high-speed sliding of the wheel on the deformation of the expansion joint during sudden loading or instantaneous loading in emergency driving conditions is not simulated.

[0065] To this end, a vehicle load loading system for bridge expansion devices can be introduced in combination with the use of this detection system to simulate the impact of high-speed sliding of wheels on expansion joint deformation during sudden loading or instantaneous loading in emergency driving conditions.

[0066] like Figures 8 to 11As shown, the automobile load loading system for the bridge expansion device includes: a load-bearing frame 1 and a wheel assembly, the wheel assembly is connected to the load-bearing frame 1 through a lifting mechanism, the wheel assembly is located above the expansion joint 3 to be detected and is driven to rise and fall by the lifting mechanism to be controllably loaded on the expansion joint 3 to be detected; wherein, the wheel assembly includes a wheel 20 and a drive motor 21 that drives the wheel 20 to rotate at a preset speed, and the load-bearing frame 1 is driven by the traveling mechanism to move in a direction parallel to the length of the expansion joint 3 to be detected.

[0067] The length direction of the expansion joint 3 to be detected is the length direction of the expansion joint.

[0068] The supporting frame 1 can be determined according to the detection scenario, for example, the supporting frame 1 can be a gantry frame, a cantilever beam structure, a hoisting supporting base member, etc.

[0069] When the traveling mechanism drives the carrier 1 to travel, the wheel assembly can be parked at any position along the length direction of the expansion joint 3 to be tested, so as to perform loading simulation tests on different positions along the length direction of the expansion joint 3 to be tested.

[0070] Implementation method of the automobile load loading system: When the expansion joint is detected, the drive motor 21 drives the wheel 20 to rotate at a preset speed, and then the lifting mechanism loads the wheel 20 on the expansion joint 3 to be detected at a set lifting amount. Before the wheel 20 directly contacts the expansion joint 3 to be detected, the drive motor 21 is powered off, and the wheel 20 interacts with the expansion joint 3 to be detected until braking is completed.

[0071] During this process, a loading system can be integrated to perform multi-dimensional testing. For example, the telescopic loading cylinder 93 stretches and compresses to collect data on the longitudinal misalignment of the expansion joint 3 under test. Subsequently, vehicle loading is applied to further investigate the performance of the expansion joint under various deformation conditions. During vehicle loading, the wheels 20 reach a preset speed to simulate sudden or transient loading of the expansion joint 3 under test, as well as the recovery state and deformation time of the expansion joint 3 after unloading.

[0072] In order to clarify the specific structure of the lifting mechanism and realize the lifting and lowering action of the wheel assembly through the lifting mechanism, preferably: the lifting mechanism includes a base member 41, a swing arm 42 and a driving telescopic member 43, the base member 41 is connected to the carrier frame 1, the swing arm 42 is rotatably connected to the base member 41, the wheel assembly is arranged on the swing arm 42, the driving telescopic member 43 is hinged to the base member 41, and the action end of the driving telescopic member 43 is hinged to the swing arm 42 to drive the swing arm 42 to swing and thereby drive the wheel assembly to lift and lower.

[0073] In order to brake the wheel 20 more stably, the wheel assembly further includes a brake system for braking the wheel.

[0074] In order to simulate the influence of changes in the vehicle load state on the expansion joint detection, preferably: a vertical load component 5 is also included, which is connected to the load-bearing frame 1 and is located above the expansion joint to be detected. The vertical load component 5 is used to apply a vertical pressure load on the expansion joint 3 to be detected.

[0075] The vertical load component 5 can be a hydraulic cylinder or a pneumatic cylinder, etc. When it is necessary to simulate the load of a car, a vertical pressure load can be applied to the expansion joint 3 to be tested, so as to conveniently simulate the deformation load of the expansion joint when it is heavily loaded.

[0076] In the above process, multi-dimensional detection can be carried out in combination with the loading system, such as: the transverse loading cylinder 92 is stretched and compressed to complete the data collection of the transverse misalignment of the expansion joint 3 to be detected; after that, the walking mechanism drives the carrier 1 to move, and parks the wheel assembly and the vertical load assembly 5 at any position in the length direction of the expansion joint 3 to be detected, so as to perform loading simulation tests with the same load or different loads on different positions in the length direction of the expansion joint 3 to be detected.

[0077] In order to provide real-time feedback on the force and travel conditions of the local position of the lifting mechanism during operation, the lifting mechanism is provided with pressure sensors and displacement sensors, specifically:

[0078] The pressure sensor and the displacement sensor may both be provided at the position where the action end of the driving telescopic member 43 is hinged to the swing arm 42 to detect whether the output force and stroke of the driving telescopic member 43 meet the requirements for the swing arm 42 to swing.

[0079] The pressure sensor and the displacement sensor can also be arranged at the position where the wheel assembly is connected to the swing arm 42 to detect the pressure change and displacement change at the connection position of the swing arm 42 when the wheel assembly is controllably loaded on the expansion joint 3 to be detected.

[0080] In order to clarify the specific structure of the walking mechanism and facilitate the walking mechanism to drive the carrier 1 to move, preferably: the carrier 1 is a gantry, the walking mechanism includes two parallel walking tracks, and also includes walking wheels arranged on the carrier 1, and the walking wheels move along the walking tracks.

[0081] like Figure 12 As shown, a synchronous motor 72 may be provided for the traveling mechanism to drive the traveling mechanism to move.

[0082] Since the wheel assembly and the vertical load assembly 5 will apply pressure to the expansion joint 3 to be tested, in order to prevent the carrier 1 from jumping or lifting, to keep the carrier 1 in stable cooperation with the walking track, to ensure that the carrier 1 can move stably along the walking track, preferably, as Figure 12 As shown, the carrier frame 1 is provided with an adjustable limit clamp 71, and the limit clamp 71 cooperates with the carrier frame 1 to clamp the walking track up and down.

[0083] In the above structure, the limiting clamp 71 is used to fix and stabilize the load frame 1 in the current position, which can avoid the displacement of the wheel assembly and the vertical load assembly 5 during the load loading process, thereby ensuring the accuracy of the detection and making the test data accurately match the test position on the expansion joint 3 to be detected.

[0084] When using the limiting clamp 71 , the following steps should be followed: first, move the carrier 1 to the preset detection position, and then tighten the fixing screws on the limiting clamp 71 to reliably limit and fix the carrier 1 at the current position.

[0085] In order to realize the detection in the direction perpendicular to the length of the expansion joint to be detected, a driving system 6 is included for driving the carrier 1 to translate along a reference direction, and the reference direction is perpendicular to the length of the expansion joint 3 to be detected.

[0086] In the above structure, when the driving system 6 drives the carrier 1 to translate, the wheel assembly can be parked at any position perpendicular to the length direction of the expansion joint 3 to be tested, and a loading simulation test can be performed.

[0087] When the carrier frame 1 is connected to the vertical load assembly 5, the drive system 6 drives the carrier frame 1 to translate, allowing the wheel assembly and vertical load assembly 5 to be positioned at any position perpendicular to the length of the expansion joint 3 to be tested, and to perform a corresponding loading simulation test. The load can be constant or variable.

[0088] Preferably, the driving system 6 is a servo hydraulic system to achieve high-precision position control.

[0089] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A detection system for a bridge expansion device, characterized in that: include: A bearing system and a loading system, wherein the bearing system comprises a fixed beam (81) and a movable beam (82) arranged relatively to each other, wherein the fixed beam (81) and the movable beam (82) are both parallel to the length direction of the expansion joint (3) to be detected, a guide beam (83) is arranged between the fixed beam (81) and the movable beam (82), the movable beam (82) is slidably arranged on the guide beam (83), and the guide beam (83) is perpendicular to the length direction of the expansion joint (3) to be detected; the loading system comprises a vertical lifting cylinder (91), a transverse loading cylinder (92) and a telescopic loading cylinder (93), the output end of the vertical lifting cylinder (91) is transmission-connected to the bottom of the fixed beam (81), the output end of the transverse loading cylinder (92) is transmission-connected to the beam end of the fixed beam (81) in the length direction, and the output end of the telescopic loading cylinder (93) is movably connected to the side wall of the movable beam (82) through a movable connection mechanism.

2. A detection system for a bridge expansion device according to claim 1, characterized in that: The movable connection mechanism is a universal joint (84) or a hinge.

3. A detection system for a bridge expansion device according to claim 1, characterized in that: The outer side of the guide beam (83) is provided with a retractable dust cover (830).

4. A detection system for a bridge expansion device according to claim 1, characterized in that: The fixed beam (81) and the movable beam (82) are respectively provided with a clamp assembly for fixing the end of the expansion joint (3) to be detected in the expansion direction.

5. A detection system for a bridge expansion device according to claim 4, characterized in that: The clamp assembly includes a displacement box clamp assembly and a spring box clamp assembly, and the displacement box clamp assembly and the spring box clamp assembly are staggered in the length direction of the expansion joint.

6. The detection system for a bridge expansion device according to claim 1, characterized in that: A rotating structure is provided between the movable beam (82) and the guide beam (83), the rotating structure comprising a rotating shaft (103) and a rotating hole (104), the movable beam (82) is slidingly provided on the guide beam (83) via a sliding structure, the sliding structure comprising a mounting base (101), one of the rotating shaft (103) and the rotating hole (104) being provided on the movable beam (82), and the other being provided on the mounting base (101).

7. A detection system for a bridge expansion device according to claim 6, characterized in that: The sliding structure further comprises an L-shaped limiting member (102), wherein the L-shaped limiting member (102) is fixedly connected to the mounting base (101).

8. The detection system for a bridge expansion device according to claim 6, characterized in that: A friction reducing plate (105) is provided between the mounting base (101) and the guide beam (83).

9. The detection system for a bridge expansion device according to claim 1, characterized in that: A plurality of pressure sensors are provided on the fixed beam (81) and / or the movable beam (82), and the pressure sensors are used to provide real-time feedback of pressure changes of the expansion joint (3) to be detected.

10. A detection system for a bridge expansion device according to any one of claims 1 to 9, characterized in that: A sensor group for performing a horizontal friction resistance test is provided on the telescopic loading oil cylinder (93), and the sensor group includes a tension sensor, a pressure sensor, and a displacement sensor.

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