Automobile load loading system for bridge expansion device

Abstract

The utility model provides an automobile load loading system for a bridge expansion device, and relates to the field of bridge expansion device detection, the system comprises a bearing frame and a wheel assembly, the wheel assembly is connected and arranged on the bearing frame through a lifting mechanism, and the lifting mechanism is arranged on the bearing frame. The wheel assembly is positioned above the expansion joint to be detected and is driven by the lifting mechanism to lift so as to be controllably loaded on the expansion joint to be detected; wherein the wheel assembly comprises wheels and a driving motor for driving the wheels to rotate at a preset speed, and the bearing frame is driven by the walking mechanism to move in the direction parallel to the length direction of the expansion joint to be detected. A bridge expansion device is commonly known as an expansion joint in engineering, and the system can simulate expansion deformation, a recovery state and deformation time of the expansion joint to be detected in a sudden change loading or instantaneous loading state of an automobile, so that the detection scene is more real, and the real deformation condition of the expansion joint is reflected more accurately.

Description

Technical Field

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

[0002] Bridge expansion joints, commonly known in engineering as expansion joints, are a crucial component of bridges. To accommodate bridge deck deformation, expansion joints are typically installed between beam ends, between beam ends and abutments, or at hinged joints. During actual use, expansion joints are subject to impact from all directions. Furthermore, bridges are subject to various factors, including temperature, load, concrete shrinkage and creep, and pier settlement, causing beam ends to move freely in three dimensions. Therefore, to ensure that expansion joints can adapt to the three-dimensional displacement requirements of bridge beam ends, preliminary performance testing is required prior to installation.

[0003] 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. It does not simulate the impact of sudden loading or instantaneous loading in emergency driving conditions, the impact of high-speed sliding of the wheel on the deformation of the expansion joint, and the recovery state and deformation time. Utility Model Content

[0004] The purpose of this utility model is to provide a vehicle load loading system for bridge expansion joints to solve the problem of the influence of high-speed wheel sliding on the deformation, recovery state and deformation time of expansion joints during sudden or instantaneous loading of vehicles in emergency driving conditions. To achieve the above purpose, the technical solutions adopted by this utility model are as follows:

[0005] A vehicle load loading system for a bridge expansion device, comprising:

[0006] A carrier frame and a wheel assembly, wherein the wheel assembly is connected to the carrier frame via a lifting mechanism, the wheel assembly is located above the expansion joint to be detected and is driven to rise and fall by the lifting mechanism to be controllably loaded on the expansion joint to be detected; wherein the wheel assembly includes a wheel and a drive motor that drives the wheel to rotate at a preset speed, and the carrier frame is driven by the traveling mechanism to move in a direction parallel to the length of the expansion joint to be detected.

[0007] In this system, in order to clarify the specific structure of the lifting mechanism so as to realize the lifting action of the wheel assembly driven by the lifting mechanism, preferably: the lifting mechanism includes a base member, a swing arm and a driving telescopic member, the base member is connected to the carrier frame, the swing arm is rotatably connected to the base member, the wheel assembly is arranged on the swing arm, the driving telescopic member is hinged to the base member, and the action end of the driving telescopic member is hinged to the swing arm to drive the swing arm to swing and thereby drive the wheel assembly to lift and lower.

[0008] In order to brake the wheel more stably, the wheel assembly further includes a brake system for braking the wheel.

[0009] In order to simulate the impact of changes in the vehicle load state on the expansion joint detection, preferably: it also includes a vertical load component, which is connected to the load-bearing frame and located above the expansion joint to be detected, and the vertical load component is used to apply a vertical pressure load on the expansion joint to be detected.

[0010] Preferably, the vertical load component is a hydraulic cylinder.

[0011] In this system, in order to provide real-time feedback on the force and travel conditions of a local position of the lifting mechanism when it is working, a pressure sensor and a displacement sensor are provided on the lifting mechanism.

[0012] Preferably, the pressure sensor and the displacement sensor may both be arranged at the position where the action end of the driving telescopic member is hinged to the swing arm, and may also both be arranged at the position where the wheel assembly is connected to the swing arm.

[0013] In order to clarify the specific structure of the walking mechanism and facilitate the walking mechanism to drive the carrier to move, preferably: the carrier is a gantry, the walking mechanism includes two parallel walking tracks, and also includes walking wheels arranged on the carrier, and the walking wheels move along the walking tracks.

[0014] In this system, since the wheel assembly and the vertical load assembly will apply pressure to the expansion joint to be tested, in order to avoid the load frame from jumping or lifting, to maintain a stable fit between the load frame and the walking track, and to ensure that the load frame can move stably along the walking track, preferably, the load frame is provided with an adjustable limit clamp, and the limit clamp cooperates with the load frame to clamp the walking track up and down.

[0015] In this system, in order to realize detection in a direction perpendicular to the length of the expansion joint to be detected, a driving system is included for driving the lifting mechanism to translate along a reference direction, and the reference direction is perpendicular to the length of the expansion joint to be detected.

[0016] The beneficial effects of the utility model are:

[0017] In this system, the wheel rotates at a preset speed, and the lifting mechanism loads the wheel onto the expansion joint to be tested with a set lifting amount. Before the wheel directly contacts the expansion joint to be tested, the drive motor is de-energized, and the wheel and the expansion joint to be tested interact until braking is completed. Because the reducer in the drive motor is set with a predetermined reduction ratio, the wheel will not reverse. This system can simulate the expansion and contraction deformation of the expansion joint to be tested when subjected to sudden or instantaneous loading from the vehicle. Furthermore, when the wheel assembly is equipped with a braking system, after the sudden or instantaneous loading of the vehicle is completed, this system can also simulate the expansion and contraction deformation of the expansion joint to be tested under the braking state of the brake system, as well as the recovery state and deformation time. This system's detection scenario is more realistic and more accurately reflects the actual deformation of the expansion joint.

[0018] 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

[0019] 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.

[0020] Figure 1 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;

[0021] Figure 2 Based on Figure 1 A schematic diagram of a partially enlarged structure of the area below the carrier;

[0022] Figure 3 Schematic diagram of the overall structure of the system when the swing arm does not drive the wheel assembly to swing;

[0023] Figure 4 Based on Figure 3 A schematic diagram of a partial enlarged structure of the area below the carrier;

[0024] Figure 5 This is a schematic diagram of the location of the expansion joint to be tested;

[0025] Figure 6 It is a structural diagram of the limit clamping member;

[0026] Figure 7 It is a structural diagram of the loading system and the bearing system;

[0027] Figure 8 A schematic diagram of a structure in which a dust cover is provided for the guide beam;

[0028] Figure 9 It is a schematic diagram of the transmission connection between the vertical lifting cylinder and the fixed beam;

[0029] Markings in the figure:

[0030] 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; 830. Dust cover; 91. Vertical lifting cylinder; 92. Horizontal loading cylinder; 93. Telescopic loading cylinder. DETAILED DESCRIPTION

[0031] 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.

[0032] like Figures 1 to 4 As shown, a vehicle load loading system for a bridge expansion device includes:

[0033] The carrier frame 1 and the wheel assembly are connected to the carrier frame 1 via a lifting mechanism. The wheel assembly is located above the expansion joint 3 to be detected and is driven by the lifting mechanism to be lifted and lowered so as to be controllably loaded on the expansion joint 3 to be detected. The wheel assembly includes a wheel 20 and a drive motor 21 that drives the wheel 20 to rotate at a preset speed. The carrier 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.

[0034] The length direction of the expansion joint 3 to be detected is the length direction of the expansion joint.

[0035] 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.

[0036] like Figure 5 As shown, the expansion joint 3 to be inspected is arranged on a carrying system, and the carrying system is used to carry the expansion joint 3 to be inspected.

[0037] 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.

[0038] Implementation method of this system:

[0039] During expansion joint detection, 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.

[0040] During the above detection process, the wheel 20 reaches a preset speed to simulate the sudden load or instantaneous load state of the expansion joint 3 to be detected, as well as the recovery state and deformation time of the expansion joint 3 to be detected after unloading.

[0041] In this system, in order to clarify the specific structure of the lifting mechanism so as to realize the lifting action of the wheel assembly driven by 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.

[0042] For wheel 20 being braked more stably, described wheel assembly also comprises the brake system that described wheel is braked.At this moment, in this system, can carry out brake after sudden change loading or instantaneous loading is finished.

[0043] 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.

[0044] 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.

[0045] After the vertical load assembly 5 is introduced, the traveling mechanism drives the carrier 1 to move. At this time, the wheel assembly and the vertical load assembly 5 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 with the same load or different loads at different positions along the length direction of the expansion joint 3 to be tested.

[0046] In this system, 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 equipped with pressure sensors and displacement sensors, specifically:

[0047] 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.

[0048] 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.

[0049] In this system, 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.

[0050] like Figure 6 As shown, a synchronous motor 72 may be provided for the traveling mechanism to drive the traveling mechanism to move.

[0051] In this system, since the wheel assembly and the vertical load assembly 5 are both pressurized and loaded on 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 running track, and to ensure that the carrier 1 can move stably along the running track, preferably, as Figure 6 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.

[0052] 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.

[0053] 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.

[0054] In this system, in order to realize detection in a 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.

[0055] 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.

[0056] 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.

[0057] Preferably, the driving system 6 is a servo hydraulic system to achieve high-precision position control.

[0058] like Figure 7 As shown, when the present system is applied, in order to clarify the specific structure of the bearing system, the bearing system includes a fixed beam 81 and a movable beam 82 arranged relatively to each other, and the side beams at both ends of the expansion joint 3 to be detected in the expansion and contraction direction are fixedly connected to the fixed beam 81 and the movable beam 82 respectively, and the fixed beam 81 and the movable beam 82 are both arranged 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 one end of the guide beam 83 is fixedly connected to the fixed beam 81, 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.

[0059] Furthermore, in order to perform multi-dimensional loading detection on the bearing system, a loading system is included, wherein the loading system includes a vertical lifting cylinder 91, a horizontal loading cylinder 92 and a telescopic loading cylinder 93, as shown in FIG. Figure 9 As shown, 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 end of the fixed beam 81, and the output end of the telescopic loading cylinder 93 is transmission connected to the side wall of the movable beam 82.

[0060] Preferably, in order to load the expansion joint 3 to be tested with a shorter length, it is determined that in a loading system: the telescopic loading cylinders 93 are set to be two adjacent ones as a group of loading units, the transverse loading cylinders 92 are set to be one as a group of loading units, and the vertical lifting cylinders 91 are set to be three adjacent ones as a group of loading units.

[0061] In the above structure, there may be multiple bearing systems, which are arranged along the length direction of the expansion joint.

[0062] like Figure 8 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 .

[0063] 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 vehicle load loading system for a bridge expansion device, characterized in that: include: A carrier (1) and a wheel assembly, wherein the wheel assembly is connected to the carrier (1) via a lifting mechanism, the wheel assembly is located above an expansion joint (3) to be detected and is driven to be lifted and lowered by the lifting mechanism so as to be controllably loaded on the expansion joint (3) to be detected; wherein the wheel assembly comprises a wheel (20) and a drive motor (21) for driving the wheel (20) to rotate at a preset speed, and the carrier (1) is driven by a traveling mechanism to move in a direction parallel to the length of the expansion joint (3) to be detected.

2. The vehicle load loading system for a bridge expansion device according to claim 1, characterized in that: The lifting mechanism comprises 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 be lifted or lowered.

3. The vehicle load loading system for a bridge expansion device according to claim 1, characterized in that: The wheel assembly also includes a brake system for braking the wheel (20).

4. The vehicle load loading system for a bridge expansion device according to claim 1, characterized in that: It also includes a vertical load component (5), which is connected to the support frame (1) and located above the expansion joint to be tested. The vertical load component (5) is used to apply a vertical pressure load on the expansion joint (3) to be tested.

5. The vehicle load loading system for a bridge expansion device according to claim 4, characterized in that: The vertical load component (5) is a hydraulic cylinder.

6. The vehicle load loading system for a bridge expansion device according to claim 2, characterized in that: The lifting mechanism is provided with a pressure sensor and a displacement sensor.

7. The vehicle load loading system for a bridge expansion device according to claim 6, characterized in that: The pressure sensor and the displacement sensor are both arranged at the position where the wheel assembly is connected to the swing arm (42).

8. The vehicle load loading system for a bridge expansion device according to claim 1, characterized in that: The carrier (1) is a gantry frame, and the traveling mechanism comprises two parallel traveling rails, and also comprises traveling wheels arranged on the carrier (1), and the traveling wheels travel along the traveling rails.

9. The vehicle load loading system for a bridge expansion device according to claim 8, characterized in that: An adjustable position-limiting clamping member (71) is provided on the carrier (1), and the position-limiting clamping member (71) cooperates with the carrier (1) to clamp the travel track up and down.

10. The vehicle load loading system for a bridge expansion device according to any one of claims 1 to 9, characterized in that: It comprises a driving system (6) for driving a lifting mechanism to translate along a reference direction, wherein the reference direction is perpendicular to the length direction of the expansion joint (3) to be detected.

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