Sea-crossing bridge surface coating anti-corrosion durability simulation test device

Abstract

The invention relates to the technical field of bridge coating testing, and particularly discloses a sea-crossing bridge surface coating anticorrosion durability simulation testing device which comprises a testing box, seawater is arranged in the testing box, two pier columns are fixedly connected to the bottom of the inner side of the testing box, a beam plate is jointly placed above the two pier columns, and one side of each pier column is fixedly connected with a limiting device. A support is installed on the upper side of the test box and fixedly connected with a lifter, a beam is installed at the telescopic end of the lifter, an installation block is arranged on the lower side of the beam, a hydraulic cylinder is installed on the lower side of the installation block, a folding arm is installed on the side wall of the installation block, and a test plate is installed at the tail end of the folding arm. The device has the beneficial effects that the beam plate is extruded through the hydraulic cylinder, so that the beam plate is stressed and deformed, the conditions that the bridge is stressed and deformed when a vehicle passes through the bridge and the coating on the outer surface of the beam plate deforms along with the deformation of the beam plate are simulated, the environment around the beam plate can be simulated, and the real use state of the beam plate is restored; the test accuracy can be improved.

Description

Technical Field

[0001] This invention relates to the field of bridge coating testing technology, and in particular to a simulation testing device for the corrosion resistance and durability of surface coatings on cross-sea bridges. Background Technology

[0002] Testing bridge anti-corrosion coatings is a crucial step in ensuring their long-term durability and protective performance, typically including laboratory testing, field testing, and long-term performance monitoring. Laboratory testing of the anti-corrosion durability of bridge anti-corrosion coatings usually employs two methods: the first involves using a knife to create a grid pattern on the coating surface of the bridge slab, then immersing the slab in seawater and assessing the coating's peeling level; the second simulates a marine or de-icing salt environment, ultimately testing the coating's resistance to salt spray corrosion. Both of these testing methods are theoretical and do not reflect the actual use of bridges, nor do they accelerate the aging process of the bridge slab coating, resulting in less accurate test results. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a simulation test device for the corrosion resistance and durability of surface coatings on cross-sea bridges.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A simulation testing device for the corrosion resistance and durability of surface coatings on cross-sea bridges includes a test chamber containing seawater. Two piers are fixedly connected to the bottom of the test chamber, and a beam is placed on top of the two piers. A limiting device is fixedly connected to one side of each pier. A bracket is mounted on the upper side of the test chamber, and a lifter is fixedly connected to the bracket. A crossbeam is mounted on the telescopic end of the lifter. An installation block is located on the lower side of the crossbeam, and a hydraulic cylinder is mounted on the lower side of the installation block. A folding arm is mounted on the side wall of the installation block, and a test plate is mounted at the end of the folding arm.

[0005] Preferably, the folding arm is equipped with a locking device.

[0006] Preferably, the bracket is equipped with one or more illumination lamps.

[0007] Preferably, upright plates are fixedly connected to both sides of the lower part of the crossbeam, and a guide beam is fixedly connected between the two upright plates. A guide hole is provided on one side of the mounting block, and the mounting block can slide horizontally back and forth along the guide beam through the guide hole. A translation device is also provided between the two upright plates, which is used to drive the mounting block to slide back and forth.

[0008] Preferably, the guide beam has a cavity inside and a water spray hole below the guide beam, so that water in the cavity can be sprayed onto the beam through the water spray hole.

[0009] Preferably, the limiting device includes a flat plate, which is fixed to the pier by a support plate, and a tapered plate is fixedly connected to the lower side of the flat plate, with the tapered plate facing the beam.

[0010] Preferably, a fixing plate is fixedly connected to the upper side of the flat plate, an electric push rod is installed on one side of the fixing plate, the telescopic end of the electric push rod is fixedly connected to a fixing box, and a camera is installed on the lower side of the fixing box.

[0011] The beneficial effects of the present invention are as follows: The present invention provides a simulation test device for the anti-corrosion durability of surface coatings on cross-sea bridges. The device uses a hydraulic cylinder to squeeze the beam plate, causing the beam plate to deform under stress. This simulates the deformation of the bridge when vehicles pass over it. When the beam plate deforms, the coating on its outer surface also deforms. At the same time, the device can also simulate the environment around the beam plate and restore the actual use state of the beam plate, thus improving the accuracy of the test. Attached Figure Description

[0012] Figure 1 This is a basic structural diagram of a simulation test device for the corrosion resistance and durability of surface coatings on cross-sea bridges provided by the present invention. Figure 2 yes Figure 1 Enlarged view of point A; Figure 3 yes Figure 1 Enlarged view of point D; Figure 4 yes Figure 1 The main view. 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 1-4 As shown in the figure, this embodiment of a simulation testing device for the corrosion resistance and durability of surface coatings on cross-sea bridges includes a test chamber 1 containing seawater. The test chamber 1 also includes a heater for heating the seawater; this heater is existing technology and will not be described in detail here. Heating the seawater during the test can increase the salinity of the air above the water surface to a certain extent, thereby accelerating the aging rate of the tested object.

[0015] Two piers 2 are fixedly connected to the bottom of the inner side of the test box 1. The two piers 2 are of the same height, and a beam slab 3 is placed on top of the two piers 2, supporting the beam slab 3. A limiting device 6 is fixedly connected to one side of each pier 2. The limiting device 6 includes a flat plate 60, which is fixed to the pier 2 by a support plate 61. A conical plate 62 is fixedly connected to the lower side of the flat plate 60, and the conical plate 62 is set facing the upper surface of the beam slab 3. The support plate 61 can limit the beam slab 3 to a certain extent in both left and right directions, that is, the beam slab 3 can only move left and right between the two support plates 61. A camera device 7 is installed on the upper side of the flat plate 60. The camera device 7 includes a fixed plate 71 fixedly connected to the upper side of the flat plate 60. An electric push rod 72 is installed on one side of the fixed plate 71. The telescopic end of the electric push rod 72 is fixedly connected to a fixed box 73. A camera 74 is installed on the lower side of the fixed box 73. The fixed box 73 and the camera 74 are moved back and forth by the electric push rod 72, so that the changes in the coating on the surface of the beam slab 3 can be captured by the camera 74.

[0016] The test box 1 is equipped with a bracket 11, which is a gantry frame. A lifting device 4 is fixedly connected to the bracket 11. The lifting device 4 is existing technology and will not be described in detail here. The telescopic end of the lifting device 4 is equipped with a crossbeam 5. A mounting block 55 is provided on the lower side of the crossbeam 5. Vertical plates 51 are fixedly connected to both sides of the lower part of the crossbeam 5. A guide beam 52 is fixedly connected between the two vertical plates 51. A guide hole is provided on one side of the mounting block 55. The mounting block 55 can slide horizontally back and forth along the guide beam 52 through the guide hole. A translation device is also provided between the two vertical plates 51. The translation device is used to drive the mounting block 55 to slide back and forth. In this embodiment, the translation device includes a lead screw 53, which rotates between the two vertical plates 51. A lead screw nut is installed on the mounting block 55. The lead screw nut is connected to the lead screw 53. At the same time, a motor 54 is installed on the vertical plate 51. The motor 54 is used to drive the lead screw 53 to rotate, so that the mounting block 55 can move left and right.

[0017] A hydraulic cylinder 9 is mounted on the lower side of the mounting block 55, and a folding arm 8 is mounted on the side wall of the mounting block 55. A test plate 82 is mounted on the end of the folding arm 8. The folding arm 8 is existing technology. The folding arm 8 is equipped with a locking device 81. When the folding arm 8 is unfolded to the designated position, the locking device 81 can lock and fix the folding arm 8.

[0018] To further accelerate the aging process, one or more illumination lamps 12 are mounted on the support 11. The angle of the illumination lamps 12 is adjustable, and the specific adjustment method is existing technology and will not be described in detail here. The illumination lamps 12 are always directed towards the beam slab 3 to simulate the beam slab 3 being exposed to sunlight, thereby accelerating the aging process to a certain extent. At the same time, the guide beam 52 has a cavity, and a water spray hole is located below the guide beam 52. Water in the cavity can be sprayed onto the beam slab 3 through the water spray hole to simulate the weathering process of the beam slab 3 being exposed to rainwater, further accelerating the aging process.

[0019] During the test, hydraulic cylinder 9 compresses beam slab 3, causing it to deform under stress. This simulates the stress and deformation of the bridge when vehicles pass over it. As beam slab 3 deforms, the coating on its outer surface also deforms. Simultaneously, the test simulates the surrounding environment of beam slab 3, reproducing its actual usage condition, thus improving the test results. Furthermore, the compressive force exerted by hydraulic cylinder 9 on beam slab 3 can fluctuate during the test, simulating situations with and without vehicles passing. When necessary, the compressive force can be increased to conduct an extreme test, maximizing the deformation of beam slab 3, allowing for observation of the coating condition. During the test, the height of the crossbeam 5 can be adjusted by the lifting device 4, so that the test plate 82 at the end of the folding arm 8 lifts the beam plate 3 and makes the conical plate 62 contact the upper surface of the beam plate 3. At the same time, the hydraulic cylinder 9 is activated to clamp the beam plate 3 above the test plate 82. The translation device drives the mounting block 55 to move left and right, so that the beam plate 3 and the conical plate 62 produce relative displacement. The coating on the surface of the beam plate 3 is scraped by the conical plate 62 to observe whether the coating is peeling off, thereby realizing the test of the anti-corrosion durability of the coating.

Claims

1. A device for simulating the corrosion durability of a surface coating on a sea-crossing bridge, characterised in that: Including test box (1), be equipped with seawater in test box (1), two pier columns (2) are fixedly connected to the inside bottom of test box (1), the beam plate (3) is placed above two pier columns (2) jointly, every pier column (2) one side is fixedly connected with limiting device (6), the support (11) is installed on the upper side of test box (1), the riser (4) is fixedly connected on the support (11), the telescopic end of riser (4) is equipped with crossbeam (5), the lower side of crossbeam (5) is equipped with mounting block (55), the lower side of mounting block (55) is equipped with hydraulic cylinder (9), the lateral wall of mounting block (55) is equipped with folding arm (8), the end of folding arm (8) is equipped with test plate (82).

2. A device for simulating the durability of anticorrosive surface coatings of sea-crossing bridges according to claim 1, characterized in that: The folding arm (8) is equipped with a locking device (81).

3. A device for simulating the durability of anticorrosive surface coatings of sea-crossing bridges according to claim 1, characterized in that: The support (11) is equipped with one or more illumination lamps (12).

4. A device for simulating the durability of anticorrosive surface coatings of sea-crossing bridges according to claim 1, characterized in that: The lower side of crossbeam (5) is fixedly connected with vertical plate (51), two vertical plates (51) are fixedly connected with guide beam (52) between, one side of mounting block (55) is equipped with guide hole, and mounting block (55) can reciprocatingly slide along guide beam (52) through guide hole, and translation device is further equipped between two vertical plates (51), and the translation device is used to drive mounting block (55) reciprocatingly slide.

5. A device for simulating the durability of anticorrosive surface coatings of sea-crossing bridges according to claim 4, characterized in that: The guide beam (52) is equipped with a cavity, and the lower side of the guide beam (52) is equipped with a water spraying hole, and the water in the cavity can be sprayed to the beam plate (3) through the water spraying hole.

6. A device for simulating the durability of anticorrosive surface coatings of sea-crossing bridges according to claim 1, characterized in that: The limiting device (6) includes a flat plate (60), which is fixed on the pier column (2) by a support plate (61), and the lower side of the flat plate (60) is fixedly connected with a conical plate (62), which is arranged towards the beam plate (3).

7. A device for simulating the durability of anticorrosive surface coatings of sea-crossing bridges according to claim 6, characterized in that: The upper side of the flat plate (60) is fixedly connected with a fixed plate (71), and the one side of the fixed plate (71) is equipped with an electric push rod (72), and the telescopic end of the electric push rod (72) is fixedly connected with a fixed box (73), and the lower side of the fixed box (73) is equipped with a camera (74).

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