Bridge expansion joint impact force testing device

Abstract

This invention discloses a bridge expansion joint impact force testing device, belonging to the field of testing equipment. It includes a base plate, with a vertical plate rotatably connected to the center of the top surface of the base plate. Driving mechanisms are provided on both sides of the vertical plate to drive its rotation. A testing mechanism is located inside the vertical plate. A column is fixedly connected to one side of the vertical plate, and a traction stabilizing mechanism is provided between the column and the vertical plate. Two parallel buffer supports are fixedly connected to the top of the side of the vertical plate away from the column, and a cleaning mechanism is provided on one side of the column. The testing mechanism specifically includes: a rectangular groove inside the vertical plate, with symmetrically formed arc-shaped vertical grooves on the inner walls of both sides of the rectangular groove, and a matching steel ball movably connected between the two arc-shaped vertical grooves. This invention allows the top of the test point to be exposed before testing, facilitating quick and accurate determination of the impact point by the operator, thereby improving testing accuracy and ease of use.

Description

Technical Field

[0001] This invention relates to a testing device, specifically a bridge expansion joint impact force testing device. Background Technology

[0002] Bridges expand and contract longitudinally under the influence of factors such as temperature. To accommodate this deformation, expansion joints are needed between the ends of the beams or between the beam ends and the abutments. Because expansion joints bear the dynamic loads of vehicles for extended periods, they are weak points in bridge structures and are currently the primary locations of bridge failure. The dynamic loads from vehicle wheels are key parameters for the design, construction, and maintenance of expansion joints. Therefore, impact testing of bridge expansion joints is a crucial part of evaluating bridge performance.

[0003] Existing impact testing equipment typically involves releasing a heavy object above the expansion joint to be tested and observing the state of the expansion joint after being impacted by the heavy object, thereby determining the impact load of the bridge expansion joint.

[0004] The existing technology has the following problems: because the heavy object is located above the expansion joint to be tested, the staff cannot quickly and accurately determine whether the impact point of the heavy object is the location to be tested, which causes inconvenience to the testing. Therefore, those skilled in the art provide a bridge expansion joint impact force testing device to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide a bridge expansion joint impact force testing device that can expose the top of the test point before testing, making it convenient for staff to quickly and accurately determine the impact point, thereby improving the accuracy of the test and making it easy to use, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A bridge expansion joint impact force testing device includes a base plate, a vertical plate rotatably connected to the middle of the top surface of the base plate, and driving mechanisms on both sides of the vertical plate to drive the vertical plate to rotate. A testing mechanism is provided inside the vertical plate. A column is fixedly connected to one side of the vertical plate, and a traction stabilizing mechanism is provided between the column and the vertical plate. Two parallel buffer supports are fixedly connected to the top of the side of the vertical plate away from the column, and a cleaning mechanism is provided on one side of the column.

[0008] As a further aspect of the present invention: the testing mechanism specifically includes: a rectangular groove inside a vertical plate, with symmetrical arc-shaped vertical grooves on the inner walls of both sides of the rectangular groove, and a matching steel ball movably connected between the two arc-shaped vertical grooves; a circular groove is provided on the top surface of the base plate corresponding to the position of the steel ball; an electromagnet is embedded in the inner wall of the arc-shaped vertical groove; a power supply is fixedly connected inside the vertical plate above the arc-shaped vertical groove; and a switch is embedded in the center of the top surface of the vertical plate.

[0009] As a further embodiment of the present invention: the traction stabilizing mechanism specifically includes: a sleeve fixed to the top of one side of the column, a stepper motor fixedly connected to the top of the column, and a cavity opened at the top of the column's interior, a winding roller rotatably connected inside the cavity, and a steel wire rope wound around the outside of the winding roller, one end of the steel wire rope passing through the sleeve and fixedly connected to the top of one side of the vertical plate, and one end of the sleeve abutting against one side of the vertical plate, and the bottom output shaft of the stepper motor passing through the top wall of the cavity and fixedly connected to the winding roller.

[0010] As a further embodiment of the present invention: a winding groove is provided on the outer side of the winding roller, and the depth of the winding groove gradually decreases from the middle position to both sides, and the wire rope is wound in the winding groove.

[0011] As a further embodiment of the present invention: the buffer support specifically includes: an outer rod fixed to the side of the vertical plate, the outer rod having an internal telescopic groove, and an inner rod movably connected inside the telescopic groove, one end of the inner rod being fixedly connected to a limit head, and the inner rod having an internal spring groove, the spring groove having an internal spring column, and the two ends of the spring column being fixedly connected to the limit head and the outer rod respectively.

[0012] As a further embodiment of the present invention: the driving mechanism specifically includes: a fixed plate fixed to the top surface of the base plate, a rotating support plate fixedly connected to one side of the top surface of the fixed plate, a motor support plate fixedly connected to one side of the rotating support plate, a rotating motor fixedly connected to one side of the motor support plate, a vertical plate located between the two rotating support plates, and the output shaft of the rotating motor passing through the motor support plate and the rotating support plate and fixedly connected to the vertical plate.

[0013] As a further embodiment of the present invention: the cleaning mechanism specifically includes: a strip groove formed in the middle of one side of the column, a linear guide rail fixedly connected to the inner wall of one side of the strip groove, a linear motor movably connected to the outside of the linear guide rail, a drive motor fixedly connected to one side of the linear motor, a cylinder fixedly connected to the output shaft of the drive motor, and a disc fixedly connected to the output shaft of the cylinder, and a plurality of evenly distributed bristles fixedly connected to the outer side of the disc.

[0014] As a further embodiment of the present invention: rollers are movably connected to the corners of the bottom end face of the base plate.

[0015] As a further embodiment of the present invention: handles are symmetrically and fixedly connected to the top of both sides of the column.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This application can rotate the vertical plate and the testing mechanism to a horizontal state before testing, thereby exposing the top of the test point, which makes it convenient for staff to quickly and accurately determine the impact point. Then, the vertical plate and the testing mechanism are rotated to a vertical state for testing, which effectively improves the accuracy of the test and is easy to use.

[0018] 2. The testing mechanism of this application can improve the accuracy of the steel ball's landing point and the stability of the falling process by setting the arc-shaped vertical groove. In addition, since the testing mechanism can be flipped, compared with the time-consuming and laborious process of sending the steel ball to a high place by traditional technology, this application only needs to adjust the testing mechanism to a horizontal state, then send the steel ball into the arc-shaped vertical groove to roll until the steel ball reaches the appropriate position, and finally fix the steel ball quickly by energizing the electromagnet, and then adjust the testing mechanism to a vertical state to continue the test. Compared with traditional technology, it is more time-saving, labor-saving and easy to operate.

[0019] 3. The traction stabilization mechanism in this application can keep the vertical plate pulled by the steel wire rope when the vertical plate is flipped and tested, thereby improving the stability of the vertical plate flipping process. In addition, the sleeve can also play a limiting role by abutting against the side of the vertical plate when the vertical plate is in a vertical state. It should be noted that the steel wire rope is always taut.

[0020] 4. The cleaning mechanism provided in this application allows a bristle-covered disc to be inserted between two arc-shaped vertical grooves and rotated when needed. The disc is then moved up and down to clean the concrete residue inside the arc-shaped vertical grooves, improving the smoothness of the inner wall of the grooves and preventing it from affecting the next test of the steel ball. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of a bridge expansion joint impact force testing device.

[0022] Figure 2 A side view of a bridge expansion joint impact force testing device;

[0023] Figure 3 This is a side view of a vertical plate in a bridge expansion joint impact force testing device;

[0024] Figure 4This is a combined view of the chamber and sleeve in a bridge expansion joint impact force testing device;

[0025] Figure 5 This is a schematic diagram of the buffer support component in a bridge expansion joint impact force testing device.

[0026] Figure 6 This is a combined view of the cylinder and brush in a bridge expansion joint impact force testing device.

[0027] In the diagram: 1. Base plate; 2. Fixing plate; 3. Rotating support plate; 4. Motor support plate; 5. Rotary motor; 6. Roller; 7. Circular groove; 8. Vertical plate; 9. Rectangular groove; 10. Arc-shaped vertical groove; 11. Electromagnet; 12. Steel ball; 13. Switch; 14. Power supply; 15. Outer rod; 16. Telescopic groove; 17. Inner rod; 18. Spring groove; 19. Spring column; 20. Limit head; 21. Column; 22. Stepper motor; 23. Handle; 24. Chamber; 25. Take-up roller; 26. Wire rope; 27. Sleeve; 28. Strip groove; 29. ​​Linear guide rail; 30. Linear motor; 31. Cylinder; 32. Disc; 33. Brush bristles; 34. Drive motor. Detailed Implementation

[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0029] Please see Figures 1-6 In this embodiment of the invention, a bridge expansion joint impact force testing device includes a base plate 1. A vertical plate 8 is rotatably connected to the middle of the top surface of the base plate 1, and driving mechanisms are provided on both sides of the vertical plate 8 to drive its rotation. A testing mechanism is provided inside the vertical plate 8. A column 21 is fixedly connected to one side of the vertical plate 8, and a traction stabilizing mechanism is provided between the column 21 and the vertical plate 8. Two parallel buffer supports are fixedly connected to the top of the side of the vertical plate 8 away from the column 21, and a cleaning mechanism is provided on one side of the column 21. This application can expose the top of the test point before testing, making it convenient for staff to quickly and accurately determine the impact point, thereby improving the accuracy of the test and facilitating its use.

[0030] In this embodiment, the testing mechanism specifically includes: a rectangular groove 9 formed inside the vertical plate 8; two arc-shaped vertical grooves 10 symmetrically formed on the inner walls of the rectangular groove 9; a matching steel ball 12 movably connected between the two arc-shaped vertical grooves 10; a circular groove 7 formed on the top surface of the bottom plate 1 corresponding to the position of the steel ball 12; an electromagnet 11 embedded in the inner wall of the arc-shaped vertical groove 10; a power supply 14 fixedly connected inside the vertical plate 8 above the arc-shaped vertical groove 10; and a switch 13 embedded in the center of the top surface of the vertical plate 8. The testing mechanism of this application can improve the accuracy of the landing point of the steel ball 12 and the stability of the falling process by setting the arc-shaped vertical groove 10. In addition, since the testing mechanism can be flipped, compared with the time-consuming and laborious process of sending the steel ball 12 to a high place by traditional technology, this application only needs to adjust the testing mechanism to a horizontal state, and then send the steel ball 12 into the arc-shaped vertical groove 10 to roll until the steel ball 12 reaches the appropriate position. Finally, the steel ball 12 is quickly fixed by energizing the electromagnet 11, and the testing mechanism is adjusted to a vertical state to continue the test. Compared with traditional technology, it is more time-saving, labor-saving and easy to operate.

[0031] In this embodiment, the traction stabilizing mechanism specifically includes: a sleeve 27 fixed to the top of one side of the column 21; a stepper motor 22 fixedly connected to the top of the column 21; a chamber 24 opened inside the top of the column 21; a winding roller 25 rotatably connected inside the chamber 24; and a steel wire rope 26 wound around the outside of the winding roller 25. One end of the steel wire rope 26 passes through the sleeve 27 and is fixedly connected to the top of one side of the vertical plate 8, and one end of the sleeve 27 abuts against one side of the vertical plate 8. The bottom output shaft of the stepper motor 22 passes through the top wall of the chamber 24 and is fixedly connected to the winding roller 25. This traction stabilizing mechanism, through its design, ensures that the vertical plate 8 is always pulled by the steel wire rope 26 during the flipping of the vertical plate 8 and the testing mechanism, thereby improving the stability of the vertical plate 8 during the flipping process. Furthermore, the sleeve 27 also acts as a limiter against the side of the vertical plate 8 when it is in a vertical position. It should be noted that the steel wire rope 26 is always taut.

[0032] In this embodiment, the outer surface of the take-up roller 25 is provided with a take-up groove, and the depth of the take-up groove gradually decreases from the middle position to both sides. The wire rope 26 is wound in the take-up groove. The take-up groove allows the wire rope 26 to wind from the middle to both sides in the winding state.

[0033] In this embodiment, the buffer support specifically includes: an outer rod 15 fixed to the side of the vertical plate 8; an expansion groove 16 is provided inside the outer rod 15; an inner rod 17 is movably connected inside the expansion groove 16; a limit head 20 is fixedly connected to one end of the inner rod 17; a spring groove 18 is provided inside the inner rod 17; a spring post 19 is provided inside the spring groove 18; and both ends of the spring post 19 are fixedly connected to the limit head 20 and the outer rod 15, respectively. The buffer support can provide support for the vertical plate 8 when it is flipped to a horizontal state, and buffer the impact force from the ground during this process.

[0034] In this embodiment, the driving mechanism specifically includes: a fixed plate 2 fixed to the top surface of the base plate 1; a rotating support plate 3 fixedly connected to one side of the top surface of the fixed plate 2; a motor support plate 4 fixedly connected to one side of the rotating support plate 3; a rotary motor 5 fixedly connected to one side of the motor support plate 4; a vertical plate 8 located between the two rotating support plates 3; and the output shaft of the rotary motor 5 passing through the motor support plate 4 and the rotating support plate 3 and fixedly connected to the vertical plate 8. The driving mechanism can drive the vertical plate 8 to rotate, thereby driving the testing mechanism to rotate.

[0035] In this embodiment, the cleaning mechanism specifically includes: a strip groove 28 located in the middle of one side of the column 21; a linear guide rail 29 fixedly connected to the inner wall of one side of the strip groove 28; a linear motor 30 movably connected to the outside of the linear guide rail 29; a drive motor 34 fixedly connected to one side of the linear motor 30; a cylinder 31 fixedly connected to the output shaft of the drive motor 34; and a disc 32 fixedly connected to the output shaft of the cylinder 31. Several evenly distributed bristles 33 are fixedly connected to the outer surface of the disc 32. Through this cleaning mechanism, when needed, the disc 32 with bristles 33 can be inserted between two arc-shaped vertical grooves 10 and rotated, then moved up and down to clean the concrete residue inside the arc-shaped vertical grooves 10, improving the smoothness of the inner wall of the arc-shaped vertical grooves 10 and avoiding affecting the next test of the steel ball 12.

[0036] In this embodiment, rollers 6 are movably connected to the corner of the bottom end face of the base plate 1. This arrangement facilitates the movement of the testing equipment and the adjustment of the test points.

[0037] In this embodiment, handles 23 are symmetrically fixed to the top of both sides of the column 21. This design facilitates the movement of the testing equipment by staff.

[0038] The working principle of this invention is as follows: First, the testing equipment is moved to the vicinity of the test point. Then, the driving mechanism rotates the vertical plate 8 and the testing mechanism to a horizontal state. Specifically, the rotating motor 5 drives the vertical plate 8 to rotate 90 degrees, thus exposing the upper part of the test point. The operator can observe the accuracy of the test point's position through the rectangular groove 9 and the circular groove 7. If inaccurate, the position of the testing equipment is adjusted until the test point is vertically aligned with the center of the circular groove 7. After positioning, the rotating motor 5 is reversed to rotate the vertical plate 8 and the testing mechanism back to a vertical state. Then, the operator presses switch 13, disconnecting the power supply 14 from the electromagnet 11. The electromagnet 11 loses its electromagnetic properties, and the steel ball 12 falls downwards along the arc-shaped vertical groove 10 under its own weight until it passes through the circular groove 7 and strikes the test point, completing the impact force test. Subsequently, the vertical plate 8 is flipped back to a horizontal position, and the steel ball 12 is then fed into the arc-shaped vertical groove 10 and rolled until it reaches the appropriate position. The steel ball 12 is then quickly secured by energizing the electromagnet 11. The testing mechanism is then adjusted to a vertical position to continue the test. Compared to the time-consuming and laborious process of traditional techniques to raise the steel ball 12, this application is more time-saving, labor-saving, and easier to operate. Workers observe the state of the expansion joint after being impacted by the steel ball 12, thereby determining the impact load on the bridge expansion joint.

[0039] It should be noted that during the flipping of the vertical plate 8 and the testing mechanism, the wire rope 26 remains taut. The traction stabilizing mechanism, through the operation of the stepper motor 22, drives the winding roller 25 to rotate, thereby winding and unwinding the wire rope 26 and constantly pulling the vertical plate 8, thus improving the stability of the vertical plate 8 during the flipping process. Furthermore, the sleeve 27, when the vertical plate 8 is in a vertical position, acts as a limit against the side of the vertical plate 8. In addition, the buffer support provides support when the vertical plate 8 is flipped to a horizontal position, and buffers the impact force from the ground during this process. Specifically, when the limiting head 20 contacts the ground and is impacted, the inner rod 17 retracts into the telescopic groove 16 of the outer rod body 15, while the spring column 19 in the spring groove 18 is compressed. The compression deformation of the spring column 19 buffers the impact force from the ground.

[0040] After the test is completed, the testing mechanism is adjusted to a vertical position, and the concrete residue in the arc-shaped vertical groove 10 is cleaned by the cleaning mechanism to improve the smoothness of the inner wall of the arc-shaped vertical groove 10 and avoid affecting the next test of the steel ball 12. The specific cleaning process is as follows: the cylinder 31 operates to extend the disc 32 between the two arc-shaped vertical grooves 10, and then the drive motor 34 operates to drive the cylinder 31 and the disc 32 to rotate together. The bristles 33 on the disc 32 follow the rotation to clean the inner wall of the arc-shaped vertical groove 10. The linear motor 30 can move up and down along the linear guide rail 29, driving the disc 32 and the bristles 33 to move up and down, thereby cleaning the arc-shaped vertical grooves 10 at different heights.

[0041] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0042] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bridge joint impact testing apparatus, characterized by, Including the bottom plate (1), the top end surface middle position of the bottom plate (1) is rotatably connected with the vertical plate (8), and the two sides of the vertical plate (8) are provided with driving mechanism to drive the vertical plate (8) to rotate, the inside of the vertical plate (8) is equipped with testing mechanism; One side of the vertical plate (8) is fixedly connected with the stand column (21), and the traction stable mechanism is arranged between the stand column (21) and the vertical plate (8), the top end of the side of the vertical plate (8) away from the stand column (21) is fixedly connected with two parallel buffer supports, and the side of the stand column (21) is provided with a cleaning mechanism; The testing mechanism, specifically comprising: the rectangular groove (9) opened in the inside of the vertical plate (8), the two side inner walls of the rectangular groove (9) are symmetrically provided with arc vertical grooves (10), and the two arc vertical grooves (10) are movably connected with the steel ball (12) matched therewith, the top end surface of the bottom plate (1) is provided with a circular groove (7) corresponding to the position of the steel ball (12), the inner wall of the arc vertical groove (10) is embedded with an electromagnet (11), and the inside of the vertical plate (8) above the arc vertical groove (10) is fixedly connected with a power supply (14), and the top end surface center of the vertical plate (8) is embedded with a switch (13); wherein the vertical plate (8) and the testing mechanism can be rotated to a horizontal state by the driving mechanism, that is, the vertical plate (8) is turned over by ninety degrees, so that the upper part of the point to be tested is exposed; subsequently, the steel ball (12) can be sent into the arc vertical groove (10) to roll until the steel ball (12) reaches the appropriate position; The cleaning mechanism, specifically comprising: the strip-shaped groove (28) opened in the middle position of the side of the stand column (21), the inner wall of one side of the strip-shaped groove (28) is fixedly connected with a linear guide rail (29), and the linear guide rail (29) is movably connected with a linear motor (30) outside, the side of the linear motor (30) is fixedly connected with a driving motor (34), the output shaft of the driving motor (34) is fixedly connected with an air cylinder (31), and the output shaft of the air cylinder (31) is fixedly connected with a disc (32), the outer side of the disc (32) is fixedly connected with a plurality of evenly distributed bristles (33).

2. The impact force testing device for bridge expansion joint according to claim 1, characterized in that, The traction stable mechanism, specifically comprising: the sleeve (27) fixed on the top end of the side of the stand column (21), the top end of the stand column (21) is fixedly connected with a stepping motor (22), and the inside of the stand column (21) is provided with a cavity (24), the inside of the cavity (24) is rotatably connected with a winding roller (25), and the winding roller (25) is wound with a steel wire rope (26) outside, one end of the steel wire rope (26) penetrates through the sleeve (27) and is fixedly connected with the top end of the side of the vertical plate (8), and the one end of the sleeve (27) abuts against the side of the vertical plate (8), and the bottom output shaft of the stepping motor (22) penetrates through the top wall of the cavity (24) and is fixedly connected with the winding roller (25).

3. The impact force testing device for bridge expansion joints according to claim 2, characterized in that The outer side of the winding roller (25) is provided with a winding groove, and the depth of the winding groove gradually decreases from the middle position to both sides, and the steel wire rope (26) is wound in the winding groove.

4. The impact force testing device for bridge expansion joints according to claim 1, characterized in that The buffer support, specifically includes: fixed in the outer rod body (15) of the side of the vertical plate (8), the inside of the outer rod body (15) is provided with telescopic slot (16), and the inside of telescopic slot (16) is movably connected with the inner rod (17), one end of the inner rod (17) is fixedly connected with the limit head (20), and the inside of the inner rod (17) is provided with spring slot (18), the inside of spring slot (18) is provided with spring column (19), and both ends of spring column (19) are fixedly connected with limit head (20) and outer rod body (15) respectively.

5. The impact force testing device for bridge expansion joints according to claim 1, characterized in that The driving mechanism, specifically includes: fixed plate (2) fixed on the top end surface of the bottom plate (1), the top end surface of the fixed plate (2) is fixedly connected with the rotating support plate (3) on one side, and the one side of the rotating support plate (3) is fixedly connected with the motor support plate (4), the one side of the motor support plate (4) is fixedly connected with the rotating motor (5), the vertical plate (8) is located between the two rotating support plates (3), the output shaft of the rotating motor (5) penetrates the motor support plate (4), the rotating support plate (3) and is fixedly connected with the vertical plate (8).

6. The impact force testing device for bridge expansion joints according to claim 1, characterized in that The bottom end surface corner position of the bottom plate (1) is movably connected with the roller (6).

7. The impact force testing device for bridge expansion joints according to claim 1, characterized in that The both sides of the vertical column (21) are fixedly connected with the handle (23) on the top end surface.

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