Bridge concrete durability test device

Abstract

The utility model discloses a bridge concrete durability test device which comprises a supporting table, a supporting assembly is arranged on the upper end face of the supporting table, an adjusting assembly is arranged on the side edge of the supporting table, and the supporting table can drive a tubular bridge concrete test piece to move left and right together through the supporting assembly by controlling and adjusting extension or contraction of an electric push rod. A servo motor is controlled to rotate forwards, so that a follow-up pressurizing plate can carry out pressure load durability tests on different positions of the left end, the middle part and the right end of the upper end surface of the tubular bridge concrete test piece, and the test range of the device is expanded; a servo motor drives the semicircular supporting plates on the left side and the right side to move towards the inner side together through a bidirectional threaded rod and a supporting vertical plate, otherwise, the semicircular supporting plates on the left side and the right side can move towards the outer side together, and therefore a worker can adjust the supporting distance of the semicircular supporting plates according to different test requirements.

Description

Bridge concrete durability testing device Technical Field

[0001] This utility model relates to the field of bridge concrete durability testing technology, and in particular, to a bridge concrete durability testing device. Background Technology

[0002] Bridge concrete refers to the concrete material used to build bridges. It is mainly composed of cement, sand, stone and other aggregates and water mixed in a certain proportion. In order to evaluate the damage resistance of bridge concrete in long-term use, a durability testing device is needed to conduct a continuous load durability test on the tubular bridge concrete components before the bridge is built.

[0003] The announcement number "CN220729892U" provides a load-bearing device for durability testing of concrete components. A first hydraulic rod drives a pressure sensor and a load-bearing plate downwards until the load-bearing plate comes into contact with the concrete component, thus applying continuous pressure to the concrete component and enabling durability testing. Two second hydraulic rods are activated to move two lifting plates upwards until multiple rotating rollers on the lifting plates come into contact with the concrete component. At this point, two motors are activated, and their outputs drive a rotating shaft and rotating rollers to rotate the concrete component placed on the rotating rollers, allowing for load-bearing durability testing on different sides.

[0004] However, the above technical solutions and existing technologies have the following drawbacks:

[0005] Although this durability testing device can perform load-bearing durability tests on different sides of a concrete component, problems such as uneven material distribution and porosity differences can easily occur during the pouring process of concrete specimens. Therefore, it is necessary to perform compressive durability tests on different positions such as the left, middle, and right ends of the concrete specimens to evaluate the consistency of the overall performance of the concrete specimens. However, the load-bearing plate in this device can only perform load-bearing durability tests on different sides of the concrete component, and cannot perform load-bearing durability tests on different positions along the length of the concrete specimen. The test range is limited, and the test is not comprehensive or accurate enough. Summary of the Invention

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a bridge concrete durability testing device, which can scientifically, comprehensively, and accurately conduct load-bearing durability tests on different locations of tubular bridge concrete test specimens.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A bridge concrete durability testing device includes a positioning base plate, a support platform, support columns, a support beam, an electro-hydraulic push rod, a pressure sensor, and a pressure plate. The device is characterized in that: the support columns are symmetrically fixed to the left and right sides of the upper surface of the positioning base plate; the support beam is fixedly connected to the top of the support columns; the electro-hydraulic push rod is installed at the middle position of the lower surface of the support beam; a pressure sensor is installed at the lower end of the electro-hydraulic push rod; a pressure plate is installed at the lower end of the pressure sensor; the support platform is attached to the upper surface of the positioning base plate; and a support assembly is provided on the upper surface of the support platform. The component is used to support the tubular bridge concrete test specimen; an adjustment assembly is provided on the side of the support platform, the adjustment assembly includes an adjustment electric actuator and a side support plate, the side support plate is fixedly connected to the left side of the upper end face of the positioning base plate, the adjustment electric actuator is installed on the right end face of the side support plate, the telescopic end of the adjustment electric actuator is connected to one end of the support platform for adjusting the lateral position of the support platform; a limit guide rail is fixedly connected to the middle position of the upper end face of the positioning base plate, the limit guide rail is T-shaped, and a limit guide groove is opened on the lower end face of the support platform, and the limit guide groove matches the limit guide rail.

[0009] Furthermore, the support assembly includes a semi-circular support plate and a support vertical plate. The support vertical plates are symmetrically arranged on the left and right sides inside the support platform. The semi-circular support plate is provided at the upper end of the support vertical plate. The two semi-circular support plates are used to support the tubular bridge concrete test specimen.

[0010] Furthermore, a servo motor is installed on the left end face of the support platform, and a bidirectional threaded rod is installed on the transmission end of the servo motor. The bidirectional threaded rod is connected to the support vertical plate by threads, and the rotation direction of the external thread on the left side of the annular side of the bidirectional threaded rod is opposite to that of the external thread on the right side of the annular side.

[0011] Furthermore, locating cavities are symmetrically formed on the left and right sides of the upper surface of the support platform, and the locating cavities are matched with the support vertical plate, with the bottom of the support vertical plate fitting into the bottom of the locating cavity.

[0012] Furthermore, a first numerical scale line is provided on the right side of the upper surface of the support platform, and the semi-circular support plate and pressure plate are both matched with the tubular bridge concrete test specimen.

[0013] Furthermore, a center position indicator arrow is sprayed on the middle position of the front end face of the support platform, and a second numerical scale line is provided on the front side of the upper end face of the positioning substrate.

[0014] Furthermore, a lifting electric actuator is installed at the middle position of the upper surface of the support platform, a support frame is installed at the upper end of the lifting electric actuator, a rotating roller is installed inside the support frame, a low-speed motor is installed at the left end of the rotating roller, and auxiliary rollers are symmetrically installed on the front and rear sides of the rotating roller.

[0015] Furthermore, a limiting sleeve is provided on the front side of the lower end face of the support frame, and a limiting rod is provided on the front side of the upper end face of the support platform, and the limiting rod matches the limiting sleeve.

[0016] This utility model has the following beneficial effects:

[0017] 1. By controlling and adjusting the extension or retraction of the electric actuator, the support platform can move left and right together with the tubular bridge concrete test specimen through the support assembly. This allows the subsequent pressure plate to conduct compressive durability tests on different positions on the left, middle, and right ends of the upper surface of the tubular bridge concrete test specimen, thereby increasing the test range of this device. During this process, the fixed limit guide rail will limit the support platform through the limit guide groove to prevent the support platform from shifting and shaking during use. The center position indicator arrow and the first numerical scale line also make it convenient for the staff to observe the movement distance of the support vertical plate, so as to adjust the lateral position of the support vertical plate more accurately.

[0018] 2. By controlling the servo motor to rotate forward, the servo motor drives the semi-circular support plates on both sides to move inward together through the bidirectional threaded rod and the support vertical plate. Conversely, the semi-circular support plates on both sides will move outward together, so that the staff can adjust the support spacing of the semi-circular support plates according to different test requirements.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 is a schematic diagram of the main structure of this utility model;

[0022] Figure 2 is a structural diagram of the support component and adjustment component in this utility model;

[0023] Figure 3 is a structural diagram of the support platform in this utility model;

[0024] Figure 4 is a structural diagram of the support component in this utility model;

[0025] Figure 5 is an enlarged view of A in Figure 2.

[0026] Legend:

[0027] 100. Positioning base plate; 200. Support platform; 300. Support column; 400. Support beam; 500. Tubular bridge concrete test specimen; 600. Electro-hydraulic push rod; 700. Support assembly; 701. Semi-circular support plate; 702. Support vertical plate; 703. Limiting cavity; 704. Servo motor; 705. Bidirectional threaded rod; 706. First digital scale line; 800. Adjustment assembly; 801. Adjusting electric push rod; 802. Side support plate; 803. Limiting guide rail; 804. Second digital scale line; 805. Center position indicator arrow; 806. Limiting guide groove; 900. Pressure sensor; 110. Pressure plate; 120. Support frame; 130. Rotating roller; 140. Auxiliary roller; 150. Low-speed motor; 160. Lifting electric push rod; 170. Limiting sleeve rod; 180. Limiting rod. Detailed Implementation

[0028] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0032] Please refer to Figures 1 to 5. A bridge concrete durability testing device in a preferred embodiment of this utility model includes a positioning base plate 100, a support platform 200, a support column 300, a support beam 400, an electro-hydraulic push rod 600, a pressure sensor 900, and a pressure plate 110. The support columns 300 are symmetrically fixedly connected to the left and right sides of the upper end face of the positioning base plate 100. The two support columns 300 are connected to the positioning base plate 100 and the support beam 400 by welding. The support beam 400 is fixedly connected to the top of the support column 300. The support column 300 can support the support beam 400 so that the support beam 400 can support the electro-hydraulic push rod 600. The electro-hydraulic push rod 600 is installed in the middle of the lower end face of the support beam 400. The power input end of the electro-hydraulic push rod 600 is electrically connected to the output end of an external control cabinet through a wire. When working, the electro-hydraulic push rod 600 can drive the pressure plate 110 to rise and fall through the pressure sensor 900.

[0033] As shown in Figure 2, a pressure sensor 900 is installed at the lower end of the electro-hydraulic push rod 600, and a pressure digital display controller (shown in both Figures 1 and 2) is installed on the front of the annular side of the support column 300. The pressure digital display controller is connected to the pressure sensor 900 via wires. When working, the pressure sensor 900 can transmit the downward pressure signal applied by the electro-hydraulic push rod 600 to the pressure digital display controller in real time. The pressure digital display controller receives the pressure signal transmitted by the pressure sensor 900 and converts it into a numerical value for observation by the staff. Since the detailed internal structure and working principle of the pressure sensor 900 and the pressure digital display controller are relatively mature technologies in the prior art, they will not be described in detail here.

[0034] The pressure sensor 900 is equipped with a pressure plate 110 at its lower end. The pressure plate 110 is matched with the tubular bridge concrete test specimen 500. The pressure plate 110 facilitates the electric hydraulic push rod 600 to apply downward pressure to the area in contact with the upper end of the tubular bridge concrete test specimen 500 through the pressure sensor 900 to conduct a durability test. The upper surface of the positioning base plate 100 is attached to a support platform 200.

[0035] As shown in Figure 2, the adjustment assembly 800 includes an adjustment electric actuator 801 and a side support plate 802. The side support plate 802 is fixedly connected to the left side of the upper end face of the positioning base plate 100. The side support plate 802 is connected to the positioning base plate 100 by welding. The side support plate 802 can support the adjustment electric actuator 801. The adjustment electric actuator 801 is installed on the right end face of the side support plate 802. The power input end of the adjustment electric actuator 801 is electrically connected to the output end of the external control cabinet through a wire. When working, the adjustment electric actuator 801 can drive the support platform 200 to move laterally, thereby adjusting the support platform 200 laterally. The bottom of the support platform 200 is in contact with the upper end face of the positioning base plate 100 so that the downward pressure on the support platform 200 is directly transmitted to the positioning base plate 100, avoiding the limit guide rail 803 from being directly subjected to the downward pressure and causing deformation and breakage.

[0036] A limiting guide rail 803 is fixedly connected to the middle position of the upper surface of the positioning base plate 100. The limiting guide rail 803 is connected to the positioning base plate 100 by welding. The limiting guide rail 803 is T-shaped. A limiting guide groove 806 is opened on the lower surface of the support platform 200, as shown in Figure 3. The limiting guide groove 806 matches the limiting guide rail 803. The matching limiting guide groove 806 and the limiting guide rail 803 can limit the support platform 200 and prevent the support platform 200 from deviating or shaking during movement. A center position indicator arrow 805 is sprayed on the middle position of the front surface of the support platform 200. A second digital scale line 804 is provided on the front side of the upper surface of the positioning base plate 100. The center position indicator arrow 805 and the second digital scale line 804 make it convenient for the staff to observe the left and right movement distance of the support platform 200 so as to adjust the movement distance of the support platform 200 more accurately.

[0037] In a further embodiment of this utility model, by controlling and adjusting the extension or retraction of the electric actuator 801, the support platform 200 can move the tubular bridge concrete test specimen 500 left and right together through the support assembly, so that the subsequent pressure plate 110 can perform compressive durability tests on different positions of the left, middle and right ends of the upper surface of the tubular bridge concrete test specimen 500, thereby improving the test range of this device.

[0038] As shown in Figure 5, a lifting electric actuator 160 is installed at the middle of the upper surface of the support platform 200. The support platform 200 supports the support assembly and the lifting electric actuator 160. The power input terminal of the lifting electric actuator 160 is electrically connected to the output terminal of an external control cabinet via a wire. A support frame 120 is installed on the upper end of the lifting electric actuator 160. When working, the lifting electric actuator 160 can drive the support frame 120 to rise and fall. A rotating roller 130 is installed inside the support frame 120. The rotating roller 130 is a rotatable structure. A low-speed motor 150 is installed on the left end of the rotating roller 130. Auxiliary motors are symmetrically installed on the front and rear sides of the rotating roller 130. The auxiliary roller 140 and support frame 120 support the rotating roller 130, low-speed motor 150, and auxiliary roller 140. The power input terminal of the low-speed motor 150 is electrically connected to the output terminal of the external control cabinet through a wire. When working, the low-speed motor 150 can drive the rotating roller 130 to rotate at a low speed, so that the rotating roller 130 can rotate the tubular bridge concrete test specimen 500 in contact at a low speed. The auxiliary roller 140 is a rotatable structure. The rotatable auxiliary roller 140 can provide auxiliary support for the tubular bridge concrete test specimen 500, making the tubular bridge concrete test specimen 500 more stable when rotating.

[0039] Furthermore, a tubular bridge concrete test specimen 500 is placed on top of the support platform 200. A limiting sleeve rod 170 is provided on the front side of the lower end face of the support frame 120. The top of the limiting sleeve rod 170 is connected to the lower end face of the support frame 120 by welding. A limiting rod 180 is provided on the front side of the upper end face of the support platform 200. The bottom of the limiting rod 180 is connected to the upper end face of the support platform 200 by welding. The limiting rod 180 and the limiting sleeve rod 170 are matched. The matching limiting rod 180 and the limiting sleeve rod 170 make the lifting stability of the support frame 120 better and prevent the support frame 120 from shaking or deviating during lifting and use.

[0040] The upper surface of the support platform 200 is provided with a support component 700, which not only supports the tubular bridge concrete test specimen 500, but also has the ability to adjust the support spacing. The side of the support platform 200 is provided with an adjustment component 800, which is used to adjust the lateral position of the support platform 200 so that the support component 700 and the support platform 200 can adapt to the requirements of different compressive durability tests.

[0041] Specifically, as shown in Figures 2 and 4, the support assembly 700 includes a semi-circular support plate 701 and a support vertical plate 702. The support vertical plate 702 is symmetrically arranged on the left and right sides inside the support platform 200. The support vertical plate 702 and the semi-circular support plate 701 are an integral structure. The support vertical plate 702 can support the semi-circular support plate 701. The semi-circular support plate 701 is provided at the upper end of the support vertical plate 702. The semi-circular support plate 701 matches the tubular bridge concrete test specimen 500. The semi-circular support plate 701 can support and limit the tubular bridge concrete test specimen 500, and prevent the tubular bridge concrete test specimen 500 from shaking during the compressive durability test.

[0042] In some embodiments of this solution, a servo motor 704 is installed on the left end face of the support platform 200. The power input terminal of the servo motor 704 is connected to an external servo motor controller via a wire. A bidirectional threaded rod 705 is installed on the transmission end of the servo motor 704, and the bidirectional threaded rod 705 is threadedly connected to the support vertical plate 702. When the servo motor 704 is working, it can drive the bidirectional threaded rod 705 to rotate at a preset speed. Since the detailed internal structure and working principle of the servo motor 704 are relatively mature technologies in the prior art, they will not be described in detail here. The rotation direction of the external thread on the left side of the annular side of the bidirectional threaded rod 705 is opposite to that of the external thread on the right side of the annular side. When the bidirectional threaded rod 705 rotates, it can drive the support vertical plates 702 on the left and right sides to move synchronously and in opposite directions, thereby realizing the adjustment of the support spacing of the semi-circular support plate 701 according to different test requirements.

[0043] Furthermore, a first digital scale line 706 is provided on the right side of the upper surface of the support platform 200. The first digital scale line 706 makes it convenient for staff to observe the movement distance of the support vertical plate 702, so as to adjust the position of the support vertical plate 702 more accurately. Limiting cavities 703 are symmetrically opened on the left and right sides of the upper surface of the support platform 200, and the limiting cavities 703 match the support vertical plate 702. The limiting cavities 703 can limit the support vertical plate 702, so as to prevent the support vertical plate 702 from shaking or shifting during the movement and use. The bottom of the support vertical plate 702 is in contact with the bottom of the limiting cavity 703. The support vertical plate 702, whose bottom is in contact with the bottom of the limiting cavity 703, can directly transmit the downward pressure to the support platform 200, so as to prevent the bidirectional threaded rod 705 from deforming and breaking due to the downward pressure of the support vertical plate 702.

[0044] Working principle: Before conducting the compressive durability test on the tubular bridge concrete specimen 500, the operator first controls the servo motor 704 to rotate forward, so that the servo motor 704 drives the left and right support vertical plates 702 to move inward synchronously through the bidirectional threaded rod 705. The support vertical plates 702 will drive the semi-circular support plate 701 to move inward together. Similarly, when the servo motor 704 is controlled to rotate in reverse, the left and right semi-circular support plates 701 can move outward synchronously. This allows the operator to adjust the support spacing of the semi-circular support plates 701 according to different test requirements. In addition, the first digital scale line 706 set in this process also makes it convenient for the operator to observe the movement distance of the support vertical plates 702, so as to adjust the position of the support vertical plates 702 more accurately.

[0045] After the support spacing of the semi-circular support plates 701 is adjusted, the tubular bridge concrete test specimen 500 can be placed on the two sets of semi-circular support plates 701. After placement, the electric hydraulic push rod 600 can be controlled to drive the pressure plate 110 down via the pressure sensor 900 to conduct a compressive load durability test on the tubular bridge concrete test specimen 500. During this process, the pressure digital display controller receives the real-time pressure signal transmitted from the pressure sensor 900 and converts it into a numerical value for real-time display by the staff. When it is necessary to rotate the tubular bridge concrete test specimen 500, the staff first controls the electric hydraulic push rod 600 to drive the pressure plate 110 up, and then... The lifting electric actuator 160 drives the rotating roller 130 and auxiliary roller 140 to rise through the support frame 120 and come into contact with the tubular bridge concrete test specimen 500. At this time, the low-speed motor 150 is started, which drives the rotating roller 130 to rotate at a low speed. The rotating roller 130 will drive the tubular bridge concrete test specimen 500 to rotate at a low speed. When the tubular bridge concrete has rotated to the required position, the low-speed motor 150 is turned off and the lifting electric actuator 160 drives the rotating roller 130 and auxiliary roller 140 to descend through the support frame 120. Then, the pressure plate 110 is lowered to conduct a compressive load durability test on different sides of the tubular bridge concrete test specimen 500.

[0046] When it is necessary to conduct a compressive durability test on different positions on the upper surface of the tubular bridge concrete test specimen 500 using the pressure plate 110, the operator first controls the pressure plate 110 to rise, and then controls the extension of the adjusting electric actuator 801. This allows the adjusting electric actuator 801 to move the support platform 200 to the right, and the support platform 200, through the support assembly, will move the tubular bridge concrete test specimen 500 to the right as well. Similarly, when the adjusting electric actuator 801 is retracted, the support platform 200, through the support assembly, will move the tubular bridge concrete test specimen 500 to the right as well. The pressure plate 110 is moved to the left so that it can perform load durability tests on different positions on the upper surface of the tubular bridge concrete test specimen 500. During this process, the limiting guide rail 803 will limit the support platform 200 through the limiting guide groove 806 to prevent the support platform 200 from shifting and shaking during the displacement process. The center position indicator arrow 805 and the first digital scale line 706 also make it convenient for the staff to observe the movement distance of the support vertical plate 702 so as to adjust the lateral position of the support vertical plate 702 more accurately.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bridge concrete durability testing device, comprising a positioning base plate (100), a support platform (200), a support column (300), a support beam (400), an electro-hydraulic push rod (600), a pressure sensor (900), and a pressure plate (110), characterized in that: The positioning base plate (100) is symmetrically and fixedly connected to the support columns (300) on the left and right sides of its upper end face. The support columns (300) are fixedly connected to the top of the support beams (400). The electric hydraulic push rod (600) is installed at the middle position of the lower end face of the support beam (400). The electric hydraulic push rod (600) is equipped with a pressure sensor (900) at its lower end. The pressure sensor (900) is equipped with a pressure plate (110) at its lower end. The positioning base plate (100) is attached to the upper end face of the positioning base plate (100). The upper end face of the support platform (200) is provided with a support assembly (700), which is used to support the tubular bridge concrete test specimen (500). The support platform (200) is provided with an adjustment mechanism on its side. The assembly (800) includes an adjustment electric push rod (801) and a side support plate (802). The side support plate (802) is fixedly connected to the left side of the upper end face of the positioning base plate (100). The adjustment electric push rod (801) is installed on the right end face of the side support plate (802). The telescopic end of the adjustment electric push rod (801) is connected to one end of the support platform (200) for adjusting the lateral position of the support platform (200). A limiting guide rail (803) is fixedly connected to the middle position of the upper end face of the positioning base plate (100). The limiting guide rail (803) is T-shaped. A limiting guide groove (806) is opened on the lower end face of the support platform (200), and the limiting guide groove (806) matches the limiting guide rail (803).

2. The bridge concrete durability testing device according to claim 1, characterized in that, The support assembly (700) includes a semi-circular support plate (701) and a support vertical plate (702). The support vertical plate (702) is symmetrically arranged on the left and right sides inside the support platform (200). The semi-circular support plate (701) is arranged on the upper end of the support vertical plate (702). The two semi-circular support plates (701) are used to support the tubular bridge concrete test specimen (500).

3. The bridge concrete durability testing device according to claim 2, characterized in that, A servo motor (704) is installed on the left end face of the support platform (200). A bidirectional threaded rod (705) is installed on the transmission end of the servo motor (704). The bidirectional threaded rod (705) is connected to the support vertical plate (702) by a thread. The external threads on the left side of the annular side of the bidirectional threaded rod (705) rotate in opposite directions to the external threads on the right side of the annular side.

4. The bridge concrete durability testing device according to claim 3, characterized in that, The upper surface of the support platform (200) is symmetrically provided with limiting cavities (703) on the left and right sides, and the limiting cavities (703) are matched with the support vertical plate (702), and the bottom of the support vertical plate (702) is in contact with the bottom of the limiting cavity (703).

5. The bridge concrete durability testing device according to claim 3, characterized in that, The support platform (200) has a first digital scale line (706) on the right side of its upper surface. The semi-circular support plate (701) and the pressure plate (110) are both matched with the tubular bridge concrete test specimen (500).

6. The bridge concrete durability testing device according to claim 1, characterized in that, The support platform (200) has a center position indicator arrow (805) sprayed on the middle position of the front end face, and the positioning base plate (100) has a second digital scale line (804) on the front side of the upper end face.

7. The bridge concrete durability testing device according to claim 1, characterized in that, A lifting electric push rod (160) is installed at the middle position of the upper end face of the support platform (200). A support frame (120) is installed at the upper end of the lifting electric push rod (160). A rotating roller (130) is installed inside the support frame (120). A low-speed motor (150) is installed at the left end of the rotating roller (130). Auxiliary rollers (140) are symmetrically installed on the front and rear sides of the rotating roller (130).

8. The bridge concrete durability testing device according to claim 7, characterized in that, A limiting sleeve rod (170) is provided on the front side of the lower end of the support frame (120), and a limiting rod (180) is provided on the front side of the upper end of the support platform (200), and the limiting rod (180) matches the limiting sleeve rod (170).

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