High-speed rail river-crossing bridge beam slab detection device

Abstract

The invention relates to the technical field of bridge detection, and particularly discloses a high-speed rail river-crossing bridge beam slab detection device which comprises a bottom plate, vertical plates fixedly connected to the two sides of the bottom plate, a compression resistance testing device arranged between the two vertical plates, two supporting devices arranged on the upper side of the bottom plate in a sliding mode, and a beam slab arranged above the two supporting devices. The two supporting devices are symmetrically arranged with the compression resistance testing device as the center, a driving assembly is arranged on the vertical plate, and the driving assembly is used for driving the two supporting devices to horizontally move on the upper side of the bottom plate at the same speed in the opposite directions. The device has the beneficial effects that the positions of the supporting devices can be changed, and the influence of supporting points at different positions on the compressive strength of the beam plate can be tested by changing the distance between the supporting devices. Due to the fact that the friction blocks make contact with the beam plate, when the beam plate is pressed, the supporting plate and the beam plate are not prone to generating relative displacement under the action of friction force.

Description

Technical Field

[0001] This invention relates to the field of bridge inspection technology, and in particular to a testing device for beams and slabs of high-speed railway bridges crossing rivers. Background Technology

[0002] High-speed railway bridges spanning rivers are crucial control projects in high-speed railway lines. They are not simply about allowing trains to cross rivers, but rather complex systems engineering projects integrating high speed, high smoothness, high safety, and high durability. The beams of high-speed railway bridges spanning rivers require extremely high torsional and bending stiffness to effectively control deflection and vibration when high-speed trains pass, ensuring track smoothness. Therefore, it is necessary to test the compressive stiffness of the beams. However, existing testing devices typically involve directly overlapping the two ends of the beam with support columns and then applying pressure from above for testing. But the position of the support columns is fixed, making it impossible to test the impact of different support column positions on the compressive stiffness of the beam. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a testing device for the beams and slabs of high-speed railway bridges crossing rivers.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A testing device for beams of a high-speed railway bridge crossing a river includes a base plate, with upright plates fixedly connected to both sides of the base plate. A compressive strength testing device is set between the two upright plates. Two support devices are slidably set on the upper side of the base plate. The beam is set above the two support devices, and the two support devices are symmetrically arranged with the compressive strength testing device as the center. A driving component is provided on the upright plate, which is used to drive the two support devices to translate in opposite directions at the same speed on the upper side of the base plate.

[0005] Preferably, the compressive strength testing device includes a fixed beam, which is fixed between two upright plates. A test hydraulic cylinder is mounted on the fixed beam, and the telescopic end of the test hydraulic cylinder is fixedly connected to a pressure plate.

[0006] Preferably, the drive assembly includes a guide block that is slidably connected in a vertical groove on one side of the upright plate. A lifting hydraulic cylinder is provided at the top of the upright plate to drive the guide block to slide up and down in the vertical groove. A swing rod is hinged between each support device and the guide block.

[0007] Preferably, the support device includes a crossbeam, a slider fixedly connected to the lower side of the crossbeam, the slider being slidably connected in a groove on the upper side of the base plate, a support column fixedly connected to the upper side of the crossbeam, and a support plate fixedly connected between the two support columns.

[0008] Preferably, a friction reduction device is fixedly connected to one side of both support columns. The friction reduction device includes two mounting plates, which are fixed to one side of each support column. One side of the mounting plate is provided with a through groove, and a sliding block is slidably connected in the through groove. The sliding block is hinged to the swing rod through a rotating shaft. One side of the sliding block is provided with an inclination angle. The top of the mounting plate is provided with a groove, which extends downward and communicates with the through groove. A sliding plate is slidably connected in the groove. A support shaft is installed between the two sliding plates. A touch plate is installed at the lower end of the sliding plate, and the touch plate is set corresponding to the inclination angle.

[0009] Preferably, the upper side of the support plate is provided with an adjustment groove, the bottom of the adjustment groove is an inclined surface, the adjustment plate is slidably connected in the adjustment groove, the bottom surface of the adjustment plate matches the inclined surface, and multiple friction blocks are installed on the upper side of the adjustment plate.

[0010] Preferably, a relief groove is provided on one side of the adjustment groove, an adjustment rod is mounted on the adjustment plate, the adjustment rod passes through the relief groove, a fixed seat is provided on one side of the support plate, an arm is hinged on the fixed seat, one end of the arm is in contact with one end of the adjustment rod, one end of the arm is provided with an arc-shaped protrusion, the other end of the arm is hinged with a collar, an annular groove is provided on the support shaft, and the collar is fixed on the annular groove.

[0011] The beneficial effects of this invention are as follows: The high-speed railway bridge beam testing device provided by this invention allows the supporting devices to move in opposite directions at the same speed on the upper side of the base plate. This changes the position of the supporting devices, and by changing the distance between the supporting devices, the influence of different support point positions on the compressive strength of the beam can be tested. Through the contact between the friction block and the beam, the supporting plate and the beam are less likely to experience relative displacement under the action of friction when the beam is under pressure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the basic structure of a high-speed railway cross-river bridge beam and slab testing device provided by the present invention; Figure 2 yes Figure 1 A partial view; Figure 3 This is a schematic diagram of the basic structure of the support device; Figure 4 yes Figure 3 Enlarged view of point N; Figure 5 yes Figure 3 Enlarged view of point A; Figure 6 This is a cross-sectional view of the support plate; Figure 7 yes Figure 6 Enlarged view of point M. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0014] like Figures 1-6 As shown in the figure, a high-speed railway cross-river bridge beam plate testing device of this embodiment includes a base plate 1, upright plates 2 are fixedly connected to both sides of the base plate 1, and multiple reinforcing ribs 10 are fixedly connected between the upright plates 2 and the base plate 1. The reinforcing ribs 10 can improve the connection strength between the upright plates 2 and the base plate 1, prevent the upright plates 2 from deforming under stress, and ensure the accuracy of the test.

[0015] A compressive strength testing device 3 is installed between the two upright plates 2. The compressive strength testing device 3 includes a fixed beam 31, which is fixed between the two upright plates 2. A test hydraulic cylinder 32 is mounted on the fixed beam 31, and the telescopic end of the test hydraulic cylinder 32 is fixedly connected to a pressure plate 33. The test hydraulic cylinder 32 pushes the pressure plate 33 to compress the beam plate 9, thereby testing the static compressive strength of the beam plate 9. During the test, a detector, which is existing technology, is installed at the bottom of the beam plate 9 to detect the deformation of the beam plate 9 under stress.

[0016] Two support devices 4 are slidably mounted on the upper side of the base plate 1. A beam plate 9 is positioned above the two support devices 4, and the two support devices 4 are symmetrically arranged around the compressive strength testing device 3. A drive assembly is provided on the vertical plate 2, which drives the two support devices 4 to translate in opposite directions at the same speed on the upper side of the base plate 1. The drive assembly includes a guide block 22, which is slidably connected within a vertical groove 21 on one side of the vertical plate 2. A lifting hydraulic cylinder 24 is provided at the top of the vertical plate 2, which drives the guide block 22 to slide up and down reciprocally within the vertical groove 21. A swing rod 23 is hinged between each support device 4 and the guide block 22, and the two swing rods 23 are also symmetrically arranged around the compressive strength testing device 3. Thus, as the lifting hydraulic cylinder 24 pushes the guide block 22 downward, the angle between the two swing rods 23 increases, thereby enabling the support devices 4 to translate in opposite directions at the same speed on the upper side of the base plate 1. This allows for changing the position of the support device 4, and by changing the distance between the support devices 4, the influence of different support points on the compressive strength of the beam 9 can be tested.

[0017] In a preferred embodiment of the present invention, the support device 4 includes a crossbeam 41, a slider 40 fixedly connected to the lower side of the crossbeam 41, the slider 40 slidingly connected within a groove 11 on the upper side of the base plate 1, a support column 42 fixedly connected to the upper side of the crossbeam 41, a support plate 5 fixedly connected between the two support columns 42, and vertical baffles 51 provided on both sides of the support plate 5, with the beam plate 9 located between the two baffles 51. The two baffles 51 can limit the beam plate 9, preventing it from shifting to one side during testing. An adjustment groove 56 is provided on the upper side of the support plate 5, the bottom of the adjustment groove 56 being an inclined surface, and an adjustment plate 52 slidably connected within the adjustment groove 56, the bottom surface of the adjustment plate 52 matching the inclined surface, and multiple friction blocks 53 mounted on the upper side of the adjustment plate 52. Through the contact between the friction blocks 53 and the beam plate 9, when the beam plate 9 is under pressure, the support plate 5 and the beam plate 9 are less likely to experience relative displacement under the action of friction. Meanwhile, when the beam plate 9 is under pressure, the frictional forces between the two support plates 5 and the beam plate 9 are in opposite directions. These two opposing frictional forces can generate a tensile force on the bottom surface of the beam plate 9, thereby indirectly allowing for testing and research on the mechanical properties of the beam plate 9 surface. The purpose of setting the adjustment plate 52 is to prevent the friction block 53 from deforming due to excessive pressure on the beam plate 9. When the beam plate 9 deforms excessively, the adjustment plate 52 will slide within the adjustment groove 56, thereby allowing for repositioning and preventing the friction block 53 from deforming.

[0018] Because of the friction between the support plate 5 and the beam plate 9, it is difficult to change the position of the support plate 5 when it is necessary to do so. Therefore, in this embodiment, a friction reduction device 6 is fixedly connected to one side of both support columns 42. When it is necessary to change the position of the support device 4, the friction reduction device 6 is used to reduce or eliminate the friction between the support plate 5 and the beam plate 9, which makes it easier to change the position of the support device 4. The friction reduction device 6 includes two mounting plates 61, which are fixed to one side of the support column 42 respectively. One side of the mounting plate 61 is provided with a through groove 62, and a sliding block 65 is slidably connected in the through groove 62. The sliding block 65 is hinged to the swing rod 23 through a rotating shaft 67. One side of the sliding block 65 is provided with an inclination angle 66. The top of the mounting plate 61 is provided with a groove that extends downward and connects to the through groove 62. A sliding plate 63 is slidably connected in the groove. A support shaft 64 is installed between the two sliding plates 63. A touch plate is installed at the lower end of the sliding plate 63, and the touch plate is set corresponding to the inclination angle 66. For use, see Figure 3 and Figure 4As the guide block 22 is moved downward by the lifting hydraulic cylinder 24, the angle between the two swing rods 23 increases, causing the sliding block 65 to slide within the through groove 62. During the movement of the sliding block 65, the tilt angle 66 and the contact plate undergo relative displacement, causing the slide plate 63 to move upward. The support shaft 64 follows the slide plate 63 upward, thereby generating a lifting force on the beam plate 9 through the support shaft 64. This eliminates or reduces the pressure of the beam plate 9 on the support plate 5, thus reducing or eliminating the friction between the support plate 5 and the beam plate 9. This allows for convenient adjustment of the position of the support device 4. Once the position of the support device 4 is determined, the sliding block 65 resets due to the gravity of the beam plate 9. At this point, the beam plate 9 re-enters contact the friction surface of the support plate 5, facilitating subsequent testing.

[0019] To further improve the detection effect, a clearance groove 57 is provided on one side of the adjustment groove 56, and an adjustment rod 55 is mounted on the adjustment plate 52. The adjustment rod 55 passes through the clearance groove 57. A fixed seat 54 is provided on one side of the support plate 5, and an arm 610 is hinged on the fixed seat 54. One end of the arm 610 contacts one end of the adjustment rod 55. An arc-shaped protrusion 611 is provided at one end of the arm 610, and a collar 69 is hinged at the other end of the arm 610. An annular groove 68 is provided on the support shaft 64, and the collar 69 is fixed on the annular groove 68. When the sliding block 65 is reset, the support shaft 64 descends. During the descent of the support shaft 64, the arm 610 rotates. When the arm 610 rotates, it exerts a squeezing force on the adjusting rod 55 through the arc-shaped protrusion 611, which in turn causes the entire plate 52 to slide in the adjusting groove 56. Since the bottom of the adjusting groove 56 is inclined, the friction surface of the support plate 5 and the beam plate 9 will have a tighter contact, which can improve the friction between the two, thus facilitating the testing of the beam plate 9 and further improving the testing effect.

Claims

1. A testing device for beams and slabs of a high-speed railway bridge crossing a river, comprising a base plate (1), upright plates (2) fixedly connected to both sides of the base plate (1), and a compressive strength testing device (3) disposed between the two upright plates (2), characterized in that: Two support devices (4) are slidably arranged on the upper side of the base plate (1), and the beam plate (9) is arranged above the two support devices (4). The two support devices (4) are symmetrically arranged with the compressive strength test device (3) as the center. A driving component is provided on the upright plate (2). The driving component is used to drive the two support devices (4) to translate in opposite directions at the same speed on the upper side of the base plate (1).

2. The high-speed railway bridge beam inspection device according to claim 1, characterized in that: The compressive strength testing device (3) includes a fixed beam (31), which is fixed between the two upright plates (2). A test hydraulic cylinder (32) is mounted on the fixed beam (31), and the telescopic end of the test hydraulic cylinder (32) is fixedly connected to the pressure plate (33).

3. The high-speed railway bridge beam inspection device according to claim 1, characterized in that: The drive assembly includes a guide block (22), which is slidably connected in a vertical groove (21) on one side of the upright plate (2). A lifting hydraulic cylinder (24) is provided at the top of the upright plate (2). The lifting hydraulic cylinder (24) is used to drive the guide block (22) to slide up and down in the vertical groove (21). A swing rod (23) is hinged between each support device (4) and the guide block (22).

4. The high-speed railway bridge beam inspection device according to claim 3, characterized in that: The support device (4) includes a crossbeam (41), a slider (40) is fixedly connected to the lower side of the crossbeam (41), the slider (40) is slidably connected in the groove (11) on the upper side of the base plate (1), a support column (42) is fixedly connected to the upper side of the crossbeam (41), and a support plate (5) is fixedly connected between the two support columns (42).

5. The high-speed railway bridge beam inspection device according to claim 4, characterized in that: The friction reduction device (6) is fixedly connected to one side of the two support columns (42). The friction reduction device (6) includes two mounting plates (61). The two mounting plates (61) are fixed to one side of the support column (42) respectively. A through groove (62) is provided on one side of the mounting plate (61). A sliding block (65) is slidably connected in the through groove (62). The sliding block (65) is hinged to the swing rod (23) through a rotating shaft (67). An inclination angle (66) is provided on one side of the sliding block (65). A groove is provided on the top of the mounting plate (61). The groove extends downward and is connected to the through groove (62). A sliding plate (63) is slidably connected in the groove. A support shaft (64) is installed between the two sliding plates (63). A touch plate is installed at the lower end of the sliding plate (63). The touch plate is set in accordance with the inclination angle (66).

6. The high-speed railway cross-river bridge beam inspection device according to claim 5, characterized in that: The support plate (5) has an adjustment groove (56) on its upper side. The bottom of the adjustment groove (56) is an inclined surface. An adjustment plate (52) is slidably connected inside the adjustment groove (56). The bottom surface of the adjustment plate (52) matches the inclined surface. Multiple friction blocks (53) are mounted on the upper side of the adjustment plate (52).

7. The high-speed railway cross-river bridge beam inspection device according to claim 6, characterized in that: The adjustment groove (56) has a clearance groove (57) on one side. The adjustment plate (52) is equipped with an adjustment rod (55), which passes through the clearance groove (57). The support plate (5) has a fixed seat (54) on one side. An arm (610) is hinged on the fixed seat (54). One end of the arm (610) is in contact with one end of the adjustment rod (55). One end of the arm (610) is provided with an arc-shaped protrusion (611). The other end of the arm (610) is hinged with a collar (69). The support shaft (64) is provided with an annular groove (68), and the collar (69) is fixed on the annular groove (68).

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