A detection device for testing the bearing capacity of highway bridges

Abstract

The present invention relates to the field of bridge detection technology, and in particular to a detection device for testing the bearing capacity of highway bridges. It comprises symmetrically distributed support legs, the symmetrically distributed support legs are rotatably connected to a fixed frame together, a multi-stage push rod is arranged on one side between the symmetrically distributed support legs, the telescopic end of the multi-stage push rod is slidably connected to the fixed frame, the fixed frame is slidably connected to a circumferentially distributed liquid storage shell, a detection rod is slidably connected inside the liquid storage shell, the fixed frame is rotatably connected to the gravity ball, and locking nuts are threadedly connected between the support legs and the gravity ball and the fixed frame. When the present invention is detected on a road surface of a highway bridge with a slope, the telescopic end of the multi-stage push rod drives the rear part of the fixed frame to move downward, so that the detection rod is perpendicular to the horizontal plane, thereby simulating the direction in which vehicles or pedestrians apply loads to the road surface when vehicles or pedestrians climb the slope, so that the measured bearing capacity is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge detection, and in particular to a detection device for checking the bearing capacity of a highway bridge. Background Art

[0002] A highway bridge is a bridge that is built when an obstacle needs to be crossed during the construction of a highway. After the construction of the highway bridge is completed, in order to evaluate the health of the highway bridge's own structure, a special detection device is needed to detect the bridge's bearing capacity, so as to determine the actual bearing capacity of the bridge during actual operation. The existing detection method is to use a detection device to apply a load to the bridge's pavement, and then observe the pavement condition (whether cracks are generated) according to the applied load. During the detection process, the direction of load application is perpendicular to the pavement, but the pavement of the highway bridge is not all on the same horizontal plane. The pavement of some bridges is inclined, requiring vehicles and pedestrians to climb the slope. During the climbing process, the gravity of the vehicle or pedestrian does not act vertically on the pavement of the bridge. Therefore, the detection result obtained by the detection method in which the direction of load application is directly perpendicular to the pavement cannot represent the actual situation, making the measured bearing capacity of the highway bridge inaccurate. Summary of the invention

[0003] In order to overcome the shortcoming mentioned in the background art that the test results obtained by using the test method in which the direction of load application is directly perpendicular to the road surface cannot represent the actual situation, the present invention provides a test device for testing the bearing capacity of highway bridges.

[0004] The technical solution is: a detection device for testing the bearing capacity of a highway bridge, comprising symmetrically distributed support legs, the symmetrically distributed support legs are rotatably connected to a fixed frame together, a multi-stage push rod is arranged on one side between the symmetrically distributed support legs, the telescopic end of the multi-stage push rod is slidably connected to the fixed frame, the upper side of the fixed frame is rotatably connected to a fixed rod, the fixed frame is installed with an electric push rod, the fixed rod is splined with a fixed block rotatably connected to the telescopic end of the electric push rod, and the fixed block is fixed with a circumferentially distributed extrusion rod. The cam is connected to the locking plate of the locking cam and the locking cam is connected to the cam face of the locking cam, and the cam face is connected to the locking plate of the locking cam, and the cam face is connected to the locking plate of the locking cam.

[0005] Furthermore, a connecting plate is slidably connected inside the connecting shell, and the connecting plate is rotatably connected to a screw rod, and the screw rod is threadedly connected to the adjacent connecting shell. The connecting plate is slidably connected to a limiting plate 1, and a spring is connected between the limiting plate 1 and the adjacent connecting plate. The limiting plate 1 is limited and squeezed with the adjacent limiting frame, and the connecting shell is squeezed and fit with the adjacent detection rod.

[0006] Furthermore, connecting blocks are fixedly connected on both sides of the liquid storage shell, and the fixing frame is slidably connected with a circumferentially distributed support plate 1 and a circumferentially distributed support plate 2, and the support plate 1 and the support plate 2 are respectively limited and matched with adjacent connecting blocks, and the support plate 1 and the support plate 2 are both fixedly connected with connecting rods, and the support plate 1 and the connecting rods on the adjacent support plate 2 are driven by gears and racks, a spring is connected between the support plate 1 and the fixing frame, and a motor is installed on the upper side of the fixing frame, and the output shaft of the motor is fixedly connected to the fixing rod.

[0007] Furthermore, the fixed frame is fixedly connected with a circumferentially distributed hydraulic telescopic rod 1, the telescopic end of the hydraulic telescopic rod 1 is fixedly connected to the adjacent support plate 1, the fixed frame is fixedly connected with a circumferentially distributed hydraulic telescopic rod 2, a connecting pipe 1 is connected between the hydraulic telescopic rod 2 and the adjacent hydraulic telescopic rod 1, the support plate 1 is fixedly connected with an extrusion plate 1, the telescopic end of the hydraulic telescopic rod 2 is fixedly connected with an extrusion plate 2, the extrusion plate 2 is slidably connected to the fixed frame, the connecting shell is fixedly connected with an extrusion rod 2, and both the extrusion plate 1 and the extrusion plate 2 are extruded and matched with the adjacent extrusion rod 2.

[0008] Furthermore, the extrusion plate 1 and the extrusion plate 2 are both configured as arc-shaped plates, and the inner sides of both of them are composed of arc-shaped surfaces and symmetrically distributed inclined surfaces.

[0009] Furthermore, the arc-shaped surfaces on the extrusion plate 1 and the extrusion plate 2 are both located between the symmetrically distributed inclined surfaces.

[0010] Furthermore, the vertical distance between the inner and outer sides of the first extrusion plate is greater than the vertical distance between the inner and outer sides of the second extrusion plate.

[0011] Furthermore, the liquid storage shell is fixedly connected with a connecting tube 2, both ends of which are connected to the liquid storage shell, and the two ends of the connecting tube 2 are respectively located on both sides of the adjacent detection rod. The connecting tube 2 is rotatably connected with a ball valve, and the ball valve and the adjacent support plate 1 are transmitted through gears and racks.

[0012] Furthermore, the fixing block is fixedly connected with a circumferentially distributed reset rod 1, the liquid storage shell is fixedly connected with a reset rod 2, and the reset rod 1 is in contact with and cooperates with the adjacent reset rod 2.

[0013] Furthermore, it also includes two circumferentially distributed electric push rods, each of which is mounted on the rotating plate, and the telescopic end of the electric push rods is fixedly connected to a three-extrusion plate, and the limit frame is rotationally limited and connected with a symmetrically distributed rotating block one near one end of the adjacent extrusion rod one, and a torsion spring is connected between the rotating block one and the adjacent limit frame, and the extrusion rod one is slidingly connected with a symmetrically distributed rotating block two near one end of the adjacent limit frame, and a tension spring is connected between the rotating block two and the adjacent extrusion rod one, the extrusion plate three is extruded and matched with the adjacent rotating block two, and the rotating block one is extruded and limited and matched with the adjacent rotating block two, the connecting shell is slidably connected to the three-extrusion plate, and a spring is connected between the two, the three-extrusion plate is extruded and matched with the adjacent reset rod one, and the three-extrusion plate is limited and matched with the adjacent limit frame.

[0014] Compared with the existing bridge bearing capacity detection devices, the present invention has achieved the following significant progress, which is specifically described as follows: when the present invention is detected on a road bridge road surface with a slope, the telescopic end of the multi-stage push rod drives the rear part of the fixed frame to move downward, so that the detection rod is perpendicular to the horizontal plane, thereby simulating the direction in which vehicles or pedestrians apply loads to the road surface when vehicles or pedestrians climb the slope, so that the measured bearing capacity is more accurate.

[0015] The present invention makes the detection rod contact with the ground first, and then applies the detection load force to the detection rod, so that the detection rod can adapt to the uneven road conditions on the road surface, thereby ensuring the accuracy of the detection result.

[0016] The present invention protects the road surface to be detected by making the connecting shell and the adjacent limiting frame move relative to each other, thereby preventing the detection rod from excessively damaging the road surface.

[0017] The present invention adjusts the magnitude of the spring force between the limiting plate 1 and the connecting plate by rotating the screw rod, thereby adjusting the force exerted by the limiting plate 1 on the adjacent limiting frame to adapt to different loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the connecting pipe 1, the connecting pipe 2 and the electric push rod 2 of the present invention;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the extrusion rod 1, the rotating plate and the limiting frame of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the connecting shell, the liquid storage shell and the detection rod of the present invention;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the fixing rod, the electric push rod 1 and the fixing block of the present invention;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the connecting plate, the screw rod and the limiting plate 1 of the present invention;

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the support plate 1, the hydraulic telescopic rod 2 and the reset rod 2 of the present invention;

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the connecting block, the first support plate and the second support plate of the present invention;

[0026] Fig. 9 It is a three-dimensional structural schematic diagram of the hydraulic telescopic rod 1, the hydraulic telescopic rod 2 and the connecting pipe 1 of the present invention;

[0027] Fig.10 It is a top view of the three-dimensional structure of the extrusion plate 1, the extrusion plate 2 and the extrusion rod 2 of the present invention;

[0028] Fig.11 It is a three-dimensional structural schematic diagram of the connection block, the second connecting pipe and the ball valve of the present invention;

[0029] Fig.12 It is a schematic diagram of the three-dimensional structure of the support plate 1, the connecting pipe 2 and the ball valve of the present invention;

[0030] Fig.13 It is a three-dimensional structural schematic diagram of the electric push rod 2, the extrusion plate 3 and the limit plate 2 of the present invention;

[0031] Fig.14 It is a three-dimensional structural schematic diagram of the electric push rod 2, the extrusion plate 3 and the rotating block 2 of the present invention;

[0032] Fig.15 It is a schematic diagram of the three-dimensional structure of the electric push rod 2, the rotating block 1 and the rotating block 2 of the present invention.

[0033] Figure numbers: 1, support leg, 11, fixed frame, 12, multi-stage push rod, 13, fixed rod, 14, electric push rod one, 15, fixed block, 16, extrusion rod one, 17, rotating plate, 18, limit frame, 19, connecting shell, 110, liquid storage shell, 111, detection rod, 112, gravity ball, 113, locking nut, 21, connecting plate, 22, screw, 23, limit plate one, 31, connecting block, 32, support plate one , 33, support plate two, 34, connecting rod, 35, motor, 41, hydraulic telescopic rod one, 42, hydraulic telescopic rod two, 43, connecting pipe one, 44, extrusion plate one, 45, extrusion plate two, 46, extrusion rod two, 51, connecting pipe two, 52, ball valve, 61, reset rod one, 62, reset rod two, 71, electric push rod two, 72, extrusion plate three, 73, rotating block one, 74, rotating block two, 75, limit plate two. DETAILED DESCRIPTION

[0034] The preferred technical solutions of the present invention are described in detail below with reference to the accompanying drawings.

[0035] When using the detection method in which the direction of load application is perpendicular to the road surface, when the road surface of the bridge to be tested is inclined and vehicles and pedestrians are required to climb the slope, the gravity of the vehicles or pedestrians does not act vertically on the road surface of the bridge. Therefore, the detection result obtained by using the detection method in which the direction of load application is directly perpendicular to the road surface cannot represent the actual situation.

[0036] Embodiment 1: A detection device for testing the bearing capacity of a highway bridge, such as Figure 1-Figure 5 As shown, it includes two support legs 1 symmetrically distributed on the left and right, the two support legs 1 symmetrically distributed on the left and right are rotatably connected to a fixed frame 11 together, a multi-stage push rod 12 is arranged at the rear between the two symmetrically distributed on the left and right, the telescopic end of the multi-stage push rod 12 is slidably connected to the fixed frame 11, the upper side of the fixed frame 11 is rotatably connected to a fixed rod 13, an electric push rod 14 is installed on the upper side of the fixed frame 11, the fixed rod 13 is spline-connected to a fixed block 15, the fixed block 15 is rotatably connected to the telescopic end of the electric push rod 14, the fixed block 15 is fixedly connected to three extrusion rods 16 distributed in the circumferential direction, and the lower end of the fixed rod 13 is fixedly connected to a rotating Plate 17, the rotating plate 17 is slidably connected with three circumferentially distributed limit frames 18, a spring is connected between the limit frame 18 and the rotating plate 17, the extrusion rod 16 moves downward to extrude the adjacent limit frame 18, the limit frame 18 is slidably connected with a connecting shell 19, and a spring is arranged between the two, the lower part of the fixed frame 11 is slidably connected with three circumferentially distributed liquid storage shells 110, the liquid storage shell 110 is filled with hydraulic oil, and a detection rod 111 is slidably connected in the liquid storage shell 110, the fixed frame 11 is rotatably connected with a gravity ball 112, and a locking nut 113 is threadedly connected between the support leg 1 and the gravity ball 112 and the fixed frame 11.

[0037] like Figure 5and Figure 6 As shown, a connecting plate 21 is slidably connected inside the connecting shell 19, and the connecting plate 21 is rotatably connected to a screw 22 threadedly connected to the adjacent connecting shell 19. The connecting plate 21 is slidably connected to a limit plate 23, and a spring is connected between the limit plate 23 and the adjacent connecting plate 21. By rotating the screw 22, the screw 22 drives the adjacent connecting plate 21 to move, and the size of the spring force between the limit plate 23 and the connecting plate 21 is adjusted. The part of the limit frame 18 located in the connecting shell 19 is set as a tooth plate, and the limit plate 23 is squeezed and limited with the tooth plate on the adjacent limit frame 18, and the connecting shell 19 moves downward to squeeze the adjacent detection rod 111.

[0038] like Figure 7-Figure 11 As shown, both sides of the upper part of the liquid storage shell 110 are fixedly connected with connecting blocks 31, and the connecting blocks 31 are set as triangular blocks. The fixed frame 11 is slidably connected with three circumferentially distributed support plates 1 32 and three circumferentially distributed support plates 2 33. The three circumferentially distributed support plates 2 33 are located on the inner side of the three circumferentially distributed support plates 1 32. The adjacent connecting blocks 31 are supported and limited by the support plates 1 32 and 33, so as to limit the adjacent liquid storage shells 110. The support plates 1 32 and 33 are fixedly connected with connecting rods 34, and the two adjacent connecting rods 34 inside and outside are driven by gears and racks. A tension spring is connected between the support plate 1 32 and the fixed frame 11. A motor 35 is installed on the upper side of the fixed frame 11, and the output shaft of the motor 35 is fixedly connected to the fixing rod 13.

[0039] like Figure 7-10 As shown, the fixed frame 11 is fixedly connected with three hydraulic telescopic rods 41 distributed in the circumferential direction, and the telescopic ends of the three hydraulic telescopic rods 41 are respectively fixedly connected with the adjacent support plates 32. The fixed frame 11 is fixedly connected with three hydraulic telescopic rods 42 distributed in the circumferential direction. The hydraulic telescopic rods 42 and the adjacent hydraulic telescopic rods 41 are connected with a connecting pipe 43, and all three are filled with hydraulic oil. The support plate 32 is fixedly connected with an extrusion plate 44, and the telescopic end of the hydraulic telescopic rod 42 is fixedly connected with an extrusion plate 45. The extrusion plate 45 is slidably connected with the fixed frame 11, and the extrusion plate 44 The extrusion plate 1 44 and the extrusion plate 2 45 are both configured as arc-shaped plates, and the inner sides of both are composed of an arc-shaped surface and symmetrically distributed inclined surfaces. The arc-shaped surfaces on the extrusion plate 1 44 and the extrusion plate 2 45 are both located between the symmetrically distributed inclined surfaces. The connecting shell 19 is fixedly connected with an extrusion rod 2 46. The inner side surfaces of the extrusion plate 1 44 and the extrusion plate 2 45 are both extruded and matched with the adjacent extrusion rod 2 46. The vertical distance between the inner and outer sides of the extrusion plate 1 44 is greater than the vertical distance between the inner and outer sides of the extrusion plate 2 45, which is used to support the plate 1 32 and the adjacent connecting block 31 to be in contact with each other initially.

[0040] like Fig.11 and Fig.12As shown, the liquid storage shell 110 is fixedly connected with a connecting pipe 2 51, and the upper and lower ends of the connecting pipe 2 51 are connected to the adjacent liquid storage shell 110, and the upper and lower ends of the connecting pipe 2 51 are respectively located on the upper and lower sides of the adjacent detection rod 111, and the connecting pipe 2 51 is rotatably connected to a ball valve 52, and the connecting pipe 2 51 is filled with hydraulic oil. The ball valve 52 is used to control whether the connecting pipe 2 51 is in a passage, and the ball valve 52 and the adjacent support plate 1 32 are driven by a gear and a rack, and this gear is rotatably connected to the fixed frame 11.

[0041] like Figure 7 and Fig.10 As shown, the fixed block 15 is fixedly connected with three circumferentially distributed reset rods 1 61, and the liquid storage shell 110 is fixedly connected with a reset rod 2 62. The reset rod 1 61 drives the adjacent reset rod 2 62 to move upward, so that the reset rod 2 62 drives the adjacent liquid storage shell 110 to move upward and reset.

[0042] Initially, the extrusion plate 2 45 contacts the adjacent extrusion rod 2 46. At this time, the adjacent extrusion plate 2 45 is limited by the extrusion rod 2 46, thereby locking the positions of the three support plates 1 32. At this time, the tension spring between the support plate 1 32 and the fixing frame 11 is in a stretched state, and at the same time, the support plate 1 32 and the support plate 2 33 are both in contact with the adjacent connecting block 31.

[0043] When it is necessary to inspect the road surface of a highway bridge, the staff first transports the fixing frame 11 to the area to be inspected by the transport device, and supports the support leg 1 on the ground. After supporting the support leg 1 on the ground, the staff starts the motor 35, and the output shaft of the motor 35 drives the fixing rod 13 to rotate. The fixing rod 13 drives the three extrusion rods 16 to rotate through the fixing block 15. At the same time, the fixing rod 13 drives the three limit frames 18 to rotate through the rotating plate 17. The limit frame 18 drives the adjacent extrusion rod 2 46 to rotate through the connecting shell 19. In this process, when the extrusion rod 2 46 rotates to the adjacent extrusion plate When the inclined part on the inner side of the second extrusion plate 45 contacts, under the action of the tension spring between the support plate 32 and the fixing frame 11, the support plate 32 moves to the side close to the center of the rotating plate 17, and the support plate 32 moves through the gear and rack to drive the ball valve 52 to rotate. During the rotation process, the ball valve 52 gradually releases the blockage of the adjacent connecting pipe 51 until the extrusion rod 46 rotates to between the adjacent extrusion plate 1 44 and the adjacent extrusion plate 2 45 and does not contact the two. Then, the ball valve 52 completely releases the blockage of the adjacent connecting pipe 51. At this time, the hydraulic oil in the liquid storage shell 110 can flow freely in the connecting pipe 51.

[0044] During the movement of support plate 1 32, support plate 1 32 drives the adjacent support plate 2 33 to move to the side away from the center of the rotating plate 17 through the gear and rack transmission, and support plate 1 32 and the adjacent support plate 2 33 move toward each other, so that the contact area between support plate 1 32 and support plate 2 33 and the adjacent connecting block 31 increases.

[0045] When the ball valve 52 releases the blockage of the adjacent connecting pipe 51, under the action of gravity, the three detection rods 111 move downward and squeeze the hydraulic oil in the adjacent liquid storage shell 110 located at the lower side of the detection rod 111, so that the hydraulic oil in the liquid storage shell 110 located at the lower side of the detection rod 111 flows upward through the adjacent connecting pipe 51, and after entering the liquid storage shell 110, it is located on the upper side of the detection rod 111 until the detection rod 111 contacts the ground, and the detection rod 111 no longer moves, so that the detection rod 111 contacts the ground first, so that the detection rod 111 can adapt to the uneven road conditions on the road surface, thereby ensuring the accuracy of the detection results.

[0046] During the rotation of the extrusion rod 46, when the extrusion rod 46 rotates to contact the inclined portion of the inner side of the adjacent extrusion plate 1 44, under the extrusion effect of the inclined portion of the inner side of the extrusion rod 46, the extrusion plate 1 44 drives the adjacent support plate 1 32 to move to the side away from the center of the rotating plate 17, and the support plate 1 32 drives the adjacent support plate 2 33 to move to the side close to the center of the rotating plate 17 through the gear and rack transmission, and the support plate 1 32 and the adjacent support plate 2 33 move in opposite directions, gradually releasing the limit on the adjacent connection block 31, until the extrusion rod 46 moves to the extrusion plate 1 When the arc-shaped portion of the inner side surface of 44 intersects the inclined portion, the support plate 1 32 and the adjacent support plate 2 33 are no longer in contact with the adjacent connecting block 31, and the support plate 1 32 and the adjacent support plate 2 33 release the limiting of the adjacent connecting block 31. Then, as the extrusion rod 2 46 rotates, the extrusion rod 2 46 moves along the arc-shaped portion of the inner side surface of the extrusion plate 1 44, and the extrusion force of the extrusion rod 2 46 on the extrusion plate 1 44 no longer increases, and the extrusion plate 1 44 no longer moves until the extrusion rod 2 46 moves to the midpoint of the inner side of the adjacent extrusion plate 1 44, and the staff turns off the motor 35.

[0047] When the support plate 132 moves toward the side away from the center of the rotating plate 17, the support plate 132 drives the ball valve 52 to rotate through the gear and rack. The ball valve 52 gradually blocks the adjacent connecting pipe 2 51 during the rotation, until the extrusion rod 2 46 moves to the intersection of the arc-shaped part and the inclined part of the inner side surface of the extrusion plate 144, and the ball valve 52 completely blocks the adjacent connecting pipe 2 51. At this time, the hydraulic oil in the liquid storage shell 110 cannot flow in the connecting pipe 2 51.

[0048] After the staff turns off the motor 35, the staff starts the electric push rod 14. The telescopic end of the electric push rod 14 drives the three squeezing rods 16 to move downward through the fixed block 15. The three squeezing rods 16 move downward to squeeze the adjacent limit frame 18 to move downward. The limit frame 18 drives the adjacent connecting shell 19 to move downward through the adjacent limit plate 23 and the adjacent connecting plate 21. When the connecting shell 19 moves down to contact the adjacent detection rod 111, the connecting shell 19 drives the adjacent detection rod 111 to move downward to perform squeezing detection on the road surface.

[0049] After the extrusion detection of the road surface is completed, the staff turns off the electric push rod 14 and starts the motor 35. The output shaft of the motor 35 drives the fixed rod 13 to rotate in the opposite direction, and then repeats the above process in the opposite direction until the extrusion rod 46 moves to contact the inclined part of the inner side of the extrusion plate 44, and the extrusion force of the extrusion rod 46 on the extrusion plate 44 gradually decreases. At this time, under the action of the tension spring between the support plate 32 and the fixed frame 11, the support plate 32 moves to the side close to the center of the rotating plate 17, and the support plate 32 moves through the gear and rack to drive the ball valve 52 to rotate. The ball valve 52 gradually releases the blockage of the adjacent connecting pipe 51 during the rotation process, until the extrusion rod 46 rotates to between the adjacent extrusion plate 44 and the adjacent extrusion plate 45, and does not contact the two, the ball valve 52 completely releases the blockage of the adjacent connecting pipe 51, and the hydraulic oil in the liquid storage shell 110 can flow freely in the connecting pipe 51.

[0050] During the movement of the support plate 1 32 , the support plate 1 32 drives the adjacent support plate 2 33 to move toward the side away from the center of the rotating plate 17 through the gear and rack transmission, and the support plate 1 32 and the adjacent support plate 2 33 move toward each other.

[0051] During the reverse rotation of the extrusion rod 46, when the extrusion rod 46 rotates to contact the inclined portion of the inner side of the adjacent extrusion plate 45, the extrusion rod 46 squeezes the adjacent extrusion plate 45 to move toward the side away from the center of the rotating plate 17 until the extrusion rod 46 rotates to contact the arc-shaped portion of the inner side of the adjacent extrusion plate 45. The extrusion rod 46 no longer squeezes the adjacent extrusion plate 45, and the extrusion plate 45 no longer moves until the extrusion rod 46 moves to the midpoint of the inner side of the extrusion plate 45, and the staff turns off the motor 35.

[0052] During the process of the extrusion plate 2 45 moving toward the side away from the center of the rotating plate 17, the extrusion plate 2 45 drives the telescopic end of the adjacent hydraulic telescopic rod 2 42 to move. At this time, the hydraulic telescopic rod 2 42 extracts the hydraulic oil in the adjacent hydraulic telescopic rod 1 41 through the connecting pipe 1 43, and the telescopic end of the hydraulic telescopic rod 1 41 drives the adjacent support plate 1 32 to move toward the side away from the center of the rotating plate 17. During the process of the support plate 1 32 moving toward the side away from the center of the rotating plate 17, the support plate 1 32 rotates through the gear and rack transmission ball valve 52, and the ball valve 52 gradually blocks the adjacent connecting pipe 2 51 during the rotation process until the extrusion rod 2 46 moves to the midpoint of the inner side surface of the extrusion plate 2 45, and the ball valve 52 completely blocks the adjacent connecting pipe 2 51. At this time, the hydraulic oil in the liquid storage shell 110 cannot flow in the connecting pipe 2 51.

[0053] During the movement of the above-mentioned support plate 1 32, the support plate 1 32 drives the adjacent support plate 2 33 to move toward the side close to the center of the rotating plate 17 through the gear and rack transmission, and the support plate 1 32 and the adjacent support plate 2 33 move in opposite directions until the extrusion rod 2 46 rotates to contact the arc-shaped portion on the inner side of the adjacent extrusion plate 2 45. The support plate 1 32 and the adjacent support plate 2 33 no longer move in opposite directions, but at this time, the support plate 1 32 and the support plate 2 33 are located on the moving path of the adjacent connecting block 31.

[0054] After the staff turns off the motor 35, the staff starts the electric push rod 14, and the telescopic end of the electric push rod 14 drives the three squeezing rods 16 to move upward through the fixed block 15. The staff controls the telescopic end of the electric push rod 14 to move upward, and the telescopic end of the electric push rod 14 drives the three reset rods 61 to move upward through the fixed block 15. During this process, when the reset rod 1 61 contacts the adjacent reset rod 2 62, the reset rod 1 61 drives the reset rod 2 62 to move upward and reset, and the reset rod 2 62 drives the adjacent liquid storage shell 110 to move upward and reset, until the fixed block 15 is reset to the initial state, and the staff turns off the electric push rod 14.

[0055] During the upward movement and reset of the liquid storage shell 110, the liquid storage shell 110 drives the two adjacent connecting blocks 31 to move upward. When the support plate 1 32 and the support plate 2 33 contact the adjacent connecting blocks 31, under the squeezing action of the inclined surface on the connecting block 31, the support plate 1 32 and the support plate 2 33 move away from each other and stretch the tension spring between the support plate 1 32 and the fixing frame 11 until the liquid storage shell 110 is reset and the two connecting blocks 31 no longer squeeze the support plate 1 32 and the support plate 2 33. Under the action of the tension spring between the support plate 1 32 and the fixing frame 11, the support plate 1 32 and the support plate 2 33 are reset and the adjacent connecting blocks 31 are limited.

[0056] After the fixing block 15 is reset to the initial state, the staff observes the situation of the road surface being squeezed by the detection rod 111, and judges whether the bearing capacity of the road surface of the highway bridge is qualified based on this situation.

[0057] In the process of the connecting shell 19 driving the adjacent detection rod 111 to move downward to perform compression detection on the road surface, when the detection rod 111 no longer moves downward, the connecting shell 19 no longer moves downward, and the connecting shell 19 and the adjacent limit frame 18 move relative to each other and compress the spring therebetween. The limit frame 18 moves to squeeze the adjacent limit plate 23, causing the limit plate 23 to move and squeeze the adjacent spring until the staff turns off the electric push rod 14. In this way, during the detection process, the road surface being detected is protected to prevent the detection rod 111 from excessively damaging the road surface.

[0058] When a greater load force needs to be applied, the staff rotates the screw rod 22 so that the screw rod 22 drives the adjacent connecting plate 21 to move, thereby increasing the elastic force of the spring between the limiting plate 23 and the connecting plate 21.

[0059] When the road surface to be inspected is a slope, after the staff supports the supporting leg 1 on the ground, the staff screws the locking nuts 113 on the supporting leg 1 and the gravity ball 112 to allow the fixing frame 11 and the gravity ball 112 shell to rotate freely, and then under the action of gravity, the gravity ball 112 rotates until the gravity ball 112 no longer rotates and the center of gravity of the gravity ball 112 is perpendicular to the horizontal plane. At this time, the staff starts the multi-stage push rod 12, and the telescopic end of the multi-stage push rod 12 drives the rear end of the fixing frame 11 to move downward until the axis of the fixing frame 11 is parallel to the axis of the gravity ball 112. The staff then stops the multi-stage push rod 12 and tightens the locking nuts 113 on the supporting leg 1 and the gravity ball 112 to prevent the fixing frame 11 and the gravity ball 112 shell from rotating. In this way, when inspecting on a sloped road surface, the inspection rod 111 is made perpendicular to the horizontal plane, thereby simulating the direction in which vehicles or pedestrians apply loads to the road surface when they climb the slope.

[0060] Embodiment 2: Based on embodiment 1, Figure 6 and Figure 13-Figure 15As shown, it also includes three electric push rods 2 71 distributed circumferentially, and the three electric push rods 2 71 distributed circumferentially are all installed on the upper side of the rotating plate 17. The telescopic end of the electric push rod 2 71 is fixedly connected with an extrusion plate 3 72 with a diamond-shaped cross section. The upper ends of the three limit frames 18 are all limited and rotatably connected with two symmetrically distributed rotating blocks 1 73. A torsion spring is connected between the rotating block 1 73 and the adjacent limit frames 18. The ends of the three extrusion rods 16 that are away from each other are slidably connected with two symmetrically distributed rotating blocks 2 74. The rotating blocks 2 74 are connected to the rotating blocks 1 73. A tension spring is connected between 4 and the adjacent extrusion rod 16, the extrusion plate 3 72 is extruded and matched with the adjacent rotating block 2 74, the rotating block 1 73 is extruded and limited with the adjacent rotating block 2 74, the connecting shell 19 is slidably connected with the limiting plate 2 75, and a spring is connected between the two, the limiting plate 2 75 is extruded and matched with the adjacent reset rod 1 61, and a U-shaped groove is provided on the upper part of the limiting plate 2 75. When the limiting frame 18 enters the U-shaped groove on the adjacent limiting plate 2 75, the limiting plate 2 75 limits the adjacent limiting frame 18.

[0061] When it is necessary to test the impact force of the road bridge pavement, the staff starts the electric push rod 2 71, and the telescopic end of the electric push rod 2 71 drives the adjacent extrusion plate 3 72 to move upward. When the extrusion plate 3 72 moves up to the target position, the staff shuts down the electric push rod 2 71 and starts the electric push rod 1 14. The telescopic end of the electric push rod 1 14 drives the three extrusion rods 1 16 to move upward through the fixed block 15. The extrusion rod 1 16 drives the adjacent limit frame 18 to move upward through the two rotating blocks 2 74 and the two rotating blocks 1 73, and stretches the spring between the rotating plate 17 and the limit frame 18. The limit frame 18 is connected to the shell 1 9 drives the adjacent limiting plate 2 75 to move upward until the two rotating blocks 2 74 are in contact with the adjacent extrusion plate 3 72. Under the extrusion action of the extrusion plate 3 72, the two rotating blocks 2 74 move away from each other and stretch the adjacent tension springs until the two rotating blocks 2 74 move to no longer limit the adjacent rotating block 1 73. Under the action of gravity and the spring force between the extension plate 17 and the limiting frame 18, the limiting frame 18 drives the rotating block 1 73 and the connecting shell 19 to move downward quickly until the connecting shell 19 is in contact with the detection rod 111. The connecting shell 19 squeezes the detection rod 111 to perform impact force detection on the road surface of the highway bridge.

[0062] During the downward movement of the connecting shell 19, when the limit plate 2 75 contacts the adjacent reset rod 1 61, under the squeezing action of the reset rod 1 61, the limit plate 2 75 moves toward the direction close to the adjacent connecting shell 19 and compresses the spring between it and the adjacent connecting shell 19 until the U-shaped groove on the limit plate 2 75 limits the adjacent limit frame 18 and the limit plate 2 75 no longer moves, thereby ensuring that the limit frame 18 and the adjacent connecting shell 19 will not slide relative to each other, thereby avoiding that when the connecting shell 19 squeezes the detection rod 111, the impact force directly acts on the connecting shell 19 and the detection rod 111, causing the limit frame 18 and the adjacent connecting shell 19 to slide relative to each other, thereby affecting the impact force of the connecting shell 19 acting on the detection rod 111.

[0063] After the limit frame 18 moves downward, the staff shuts down the electric push rod 14 until the impact force detection is completed, and then the staff starts the electric push rod 14. The telescopic end of the electric push rod 14 drives the three squeezing rods 16 to move downward through the fixed block 15, and the squeezing rod 16 drives the two adjacent rotating blocks 2 74 to move downward. After the rotating block 2 74 moves downward, the squeezing of the squeezing plate 3 72 on the adjacent rotating block 2 74 is reduced. Subsequently, under the action of the adjacent tension springs, the two adjacent rotating blocks 2 74 move toward each other and reset until the rotating block 2 74 moves to contact the adjacent rotating block 1 73. Under the squeezing action of the two rotating blocks 74, the rotating block 73 rotates and causes the adjacent torsion spring to store force until the rotating block 74 passes the adjacent rotating block 73. Under the action of the adjacent torsion spring, the rotating block 73 rotates and resets. Then the staff controls the telescopic end of the electric push rod 14 to move upward. The telescopic end of the electric push rod 14 drives the three squeezing rods 16 to move upward through the fixed block 15. The squeezing rod 16 drives the adjacent limit frames 18 to move upward through the two rotating blocks 74 and the two rotating blocks 73. After the limit frames 18 are reset, the staff shuts down the electric push rod 14.

[0064] The above embodiments are provided for persons familiar with the art to implement or use the present invention. Personnel familiar with the art may make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments.

Claims

1. A detection device for testing the bearing capacity of a highway bridge, comprising symmetrically distributed support legs (1), the symmetrically distributed support legs (1) being rotatably connected to a fixed frame (11), a multi-stage push rod (12) being arranged on one side between the symmetrically distributed support legs (1), the telescopic end of the multi-stage push rod (12) being slidably connected to the fixed frame (11), the upper side of the fixed frame (11) being rotatably connected to a fixed rod (13), the fixed frame (11) being installed with an electric push rod (14), the fixed rod (13) being spline-connected to a fixed block (15) rotatably connected to the telescopic end of the ... The block (15) is fixedly connected with a circumferentially distributed extrusion rod (16), the lower end of the fixed rod (13) is fixedly connected with a rotating plate (17), the rotating plate (17) is slidably connected with a circumferentially distributed limit frame (18), a spring is connected between the limit frame (18) and the rotating plate (17), the limit frame (18) is extruded and matched with the adjacent extrusion rod (16), the limit frame (18) is slidably connected with a connecting shell (19), and a spring is arranged between the two, the fixed frame (11) is slidably connected with a circumferentially distributed liquid storage shell (110), and a detection rod (111) is slidably connected in the liquid storage shell (110), characterized in that: It also includes a gravity ball (112), the gravity ball (112) being rotatably connected to the fixing frame (11), and a locking nut (113) being threadedly connected between the support leg (1) and the gravity ball (112) and the fixing frame (11); A connecting plate (21) is slidably connected inside the connecting shell (19), and the connecting plate (21) is rotatably connected to a screw rod (22), and the screw rod (22) is threadedly connected to the adjacent connecting shell (19), and the connecting plate (21) is slidably connected to a limiting plate 1 (23), and a spring is connected between the limiting plate 1 (23) and the adjacent connecting plate (21), and the limiting plate 1 (23) is limited and pressed together with the adjacent limiting frame (18), and the connecting shell (19) is pressed together with the adjacent detection rod (111); Both sides of the liquid storage shell (110) are fixedly connected with connection blocks (31); the fixing frame (11) is slidably connected with a circumferentially distributed support plate 1 (32) and a circumferentially distributed support plate 2 (33); the support plate 1 (32) and the support plate 2 (33) are respectively limitedly matched with adjacent connection blocks (31); the support plate 1 (32) and the support plate 2 (33) are both fixedly connected with a connection rod (34); the support plate 1 (32) and the connection rod (34) on the adjacent support plate 2 (33) are driven by a gear and a rack; a spring is connected between the support plate 1 (32) and the fixing frame (11); a motor (35) is installed on the upper side of the fixing frame (11); the output shaft of the motor (35) is fixedly connected to the fixing rod (13); The fixing frame (11) is fixedly connected with a circumferentially distributed hydraulic telescopic rod 1 (41), the telescopic end of the hydraulic telescopic rod 1 (41) is fixedly connected to the adjacent support plate 1 (32), the fixing frame (11) is fixedly connected with a circumferentially distributed hydraulic telescopic rod 2 (42), a connecting pipe 1 (43) is connected between the hydraulic telescopic rod 2 (42) and the adjacent hydraulic telescopic rod 1 (41), the support plate 1 (32) is fixedly connected with an extrusion plate 1 (44), the telescopic end of the hydraulic telescopic rod 2 (42) is fixedly connected with an extrusion plate 2 (45), the extrusion plate 2 (45) is slidably connected to the fixing frame (11), the connecting shell (19) is fixedly connected with an extrusion rod 2 (46), the extrusion plate 1 (44) and the extrusion plate 2 (45) are both extrusion-matched with the adjacent extrusion rod 2 (46); The liquid storage shell (110) is fixedly connected with a second connecting pipe (51), both ends of the second connecting pipe (51) are connected with the liquid storage shell (110), and the two ends of the second connecting pipe (51) are respectively located on both sides of the adjacent detection rod (111), and the second connecting pipe (51) is rotatably connected with a ball valve (52), and the ball valve (52) and the adjacent support plate (32) are driven by a gear and a rack; The fixing block (15) is fixedly connected to a circumferentially distributed reset rod 1 (61), and the liquid storage shell (110) is fixedly connected to a reset rod 2 (62), and the reset rod 1 (61) is in contact with the adjacent reset rod 2 (62).

2. A detection device for testing the bearing capacity of a highway bridge according to claim 1, characterized in that: The first extrusion plate (44) and the second extrusion plate (45) are both configured as arc-shaped plates, and the inner sides of both of them are composed of arc-shaped surfaces and symmetrically distributed inclined surfaces.

3. A detection device for testing the bearing capacity of a highway bridge according to claim 1, characterized in that: The arc-shaped surfaces on the first extrusion plate (44) and the second extrusion plate (45) are both located between the symmetrically distributed inclined surfaces.

4. A detection device for testing the bearing capacity of a highway bridge according to claim 1, characterized in that: The vertical distance between the inner and outer sides of the first extrusion plate (44) is greater than the vertical distance between the inner and outer sides of the second extrusion plate (45).

5. The detection device for testing the bearing capacity of a highway bridge according to claim 1, characterized in that: It also includes two circumferentially distributed electric push rods (71), which are all mounted on the rotating plate (17), and the telescopic ends of the two electric push rods (71) are fixedly connected to the extrusion plate (72), and the end of the limit frame (18) close to the adjacent extrusion rod (16) is connected to a symmetrically distributed rotating block (73), and a torsion spring is connected between the rotating block (73) and the adjacent limit frame (18), and the end of the extrusion rod (16) close to the adjacent limit frame (18) is slidably connected to the symmetrically distributed rotating block (73). The second moving block (74) is connected with a tension spring between the second rotating block (74) and the adjacent extrusion rod (16), the extrusion plate (72) is extruded and matched with the adjacent second rotating block (74), the first rotating block (73) is extruded and limited with the adjacent second rotating block (74), the connecting shell (19) is slidably connected with the second limiting plate (75), and a spring is connected between the two, the second limiting plate (75) is extruded and matched with the adjacent reset rod (61), and the second limiting plate (75) is limited with the adjacent limiting frame (18).

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