Steel structure detection device for bridge maintenance

Abstract

The invention discloses a steel structure detection device for bridge maintenance, and belongs to the field of steel structure bridge detection, the steel structure detection device comprises a detection table, the top of the detection table is provided with a test positioning mechanism used for stabilizing a transverse port of an orthogonal special-shaped plate, and the top of the detection table is provided with a detection unit used for detecting the deflection of the orthogonal special-shaped plate. And a deflection detection driving mechanism is arranged at the top of the detection table and provides stable driving for the detection unit. In the deflection test process of the orthogonal special-shaped plate, the test stepping motor drives the pressurizing threaded rod to rotate, so that hydraulic pressure in the adjusting hydraulic sleeve is changed, downward adjustable test pressure on the deflection test roller is generated, and meanwhile, the detection servo motor drives the transverse driving module to rotate, so that the deflection of the orthogonal special-shaped plate is detected. And the transverse driving seat moves transversely, so that the deflection test roller can change the pressure applying part and the pressure applying force on the orthogonal special-shaped plate at any time, and the test efficiency in the alternating load deflection detection process of the orthogonal special-shaped plate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure bridge detection, and in particular to a steel structure detection device for bridge maintenance. Background Art

[0002] Among steel structure bridges, orthogonal special-shaped steel bridges are widely used due to their small weight, high overall safety and ease of mechanized processing and assembly in factories. The deck of an orthogonal special-shaped steel bridge is welded by orthogonal special-shaped plates (because their stiffness is different in two perpendicular directions, resulting in structural anisotropy), that is, a structure composed of longitudinal and transverse perpendicular stiffening ribs (longitudinal ribs and transverse ribs) together with the bridge deck cover that jointly bears the wheel load.

[0003] The alternating loads borne during the service of the bridge will accelerate the fatigue cracks at the weld toe and weld root of the U-shaped auxiliary angle of the orthogonal special-shaped plate, and when the bridge deck pavement layer is damaged, the durability of the steel structure bridge will be reduced. Therefore, after the orthogonal special-shaped plate is assembled, it is necessary to extract steel structure samples for load deflection test. The traditional detection method is to apply constant pressure to the fixed part of the top of the orthogonal special-shaped plate through hydraulic equipment, and then measure the bending amplitude under normal pressure state. However, the load borne by the orthogonal special-shaped plate during service is an alternating load, that is, the pressure position and pressure size of the top will change. It is necessary to adjust the pressure position of the orthogonal special-shaped plate and the pressure size of the hydraulic equipment for many times, resulting in a cumbersome detection process and a long detection time, which affects the load deflection detection efficiency of the orthogonal special-shaped plate.

[0004] Therefore, a steel structure detection device for bridge maintenance is now proposed. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that in the existing orthogonal special-shaped plate deflection test, only a constant pressure is applied to the top fixed part, and the pressure position of the orthogonal special-shaped plate and the pressure size of the hydraulic equipment need to be adjusted multiple times, resulting in a long detection time and reducing the efficiency of its load deflection detection. A steel structure detection device for bridge maintenance is proposed to solve the problem that in the existing orthogonal special-shaped plate deflection test, only a constant pressure is applied to the top fixed part, and the pressure position of the orthogonal special-shaped plate and the pressure size of the hydraulic equipment need to be adjusted multiple times, resulting in a long detection time and reducing its load deflection detection efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A steel structure inspection device for bridge maintenance, comprising an inspection platform for inspecting load deflection tests of orthogonal special-shaped plates, a test positioning mechanism being arranged on the top of the inspection platform, the test positioning mechanism being used to stabilize the transverse ports of the orthogonal special-shaped plates, the test positioning mechanism comprising a port positioning bracket arranged on the top of the inspection platform, a limit support slider being arranged on the top of the port positioning bracket being slidably connected to the edge of the transverse port of the orthogonal special-shaped plates, and a U-shaped auxiliary angle support seat being slidably connected to the bottom of the orthogonal special-shaped plates being fixed on the top of the port positioning bracket;

[0008] A detection unit is arranged on the top of the detection platform, and the detection unit consists of an initial detection mechanism and a termination detection mechanism. The initial detection mechanism is used to detect the initial deflection of the orthogonal special-shaped plate, and the termination detection mechanism is used to detect the termination deflection of the orthogonal special-shaped plate. A deflection detection drive mechanism is arranged on the top of the detection platform, and the deflection detection drive mechanism provides stable drive for the detection unit.

[0009] Preferably, the deflection detection drive mechanism comprises a detection stable bracket arranged on the top of the detection platform, a driving component is arranged on the left side of the detection stable bracket, the driving component is composed of a detection servo motor, a driving gear set and a lateral driving module, and the outer surface of the lateral driving module is transmission-connected with a pressurizing base;

[0010] The top of the pressurizing base is slidably connected to a transverse driving seat via a transverse driving slide rod. A hydraulic driving component is arranged on the top of the transverse driving seat. The hydraulic driving component consists of a test stepping motor, a pressurizing threaded rod and an adjusting hydraulic sleeve.

[0011] Preferably, the driving gear set is composed of a driving wheel fixed to the output shaft of the detection servo motor and a driven wheel meshing with the driving wheel, and the inner wall of the adjusting hydraulic sleeve is slidably connected to an adjusting pressurizing cover threadedly connected to a pressurizing threaded rod.

[0012] Preferably, the initial detection mechanism comprises an initial detection wall fixed to the top of the detection stabilizing bracket and a lifting detection rod arranged at the bottom of the adjusting hydraulic sleeve, the initial detection wall is symmetrically arranged, and an initial deflection lower limit slide plate is fixedly installed inside the initial detection wall through a hydraulic device, the inner wall of the initial deflection lower limit slide plate is provided with an arc-shaped lower limit slide groove, the inner wall of the initial detection wall is slidably connected to a test track fixing slider through a compression spring, and the opposite sides of a plurality of the test track fixing sliders form a deflection lower limit initial detection track through sliding rollers, and the front and rear sides of the adjusting hydraulic sleeve are fixed with driving slide blocks slidably connected to the deflection lower limit initial detection track;

[0013] The bottom of the lifting detection rod is rotatably connected to a deflection test roller, and a detection conductive contact piece is fixed to the outer surface of the lifting detection rod. The inner wall of the adjusting hydraulic sleeve is sealingly and slidingly connected to the deflection test sleeve. The inner wall of the deflection test sleeve is provided with a detection alarm for detecting the conductive contact piece touching the electrical connection. The detection alarm is turned on by monitoring the power-off falling edge of the detection conductive contact piece.

[0014] Preferably, track adjustment sliders are fixed on both the front and rear sides of the test track fixing slider, an electric telescopic cylinder is fixed on the inner wall of the initial detection wall, a track fixing plate is fixedly installed through a telescopic connecting rod, and a spring touch pressure slider is slidably connected to the side of the track fixing plate close to the track adjustment slider, and the spring touch pressure slider is touch-connected to the front side of the track adjustment slider.

[0015] Preferably, the deflection test sleeve consists of a pressure slide cover that is sealingly and slidingly connected to the inner wall of the adjusting hydraulic sleeve and a lifting control sleeve fixed to the bottom of the pressure slide cover. A positioning groove is provided on the inner wall of the lifting control sleeve, and a spring positioning column that is slidably connected to the positioning groove is provided on the side wall of the lifting detection rod.

[0016] Preferably, the termination detection mechanism is composed of a coarse detection component arranged inside the initial detection wall and a fine detection component arranged inside the detection platform, the coarse detection component is used to detect the overall deflection of the orthogonal special-shaped plate, and the fine detection component is used to detect the partial deflection of the orthogonal special-shaped plate, the coarse detection component includes a deflection optical detector arranged inside the initial detection wall, the deflection optical detector is composed of a laser transmitter and a laser receiver, an optical detection square hole for detecting the deflection range after the test is opened inside the fixed slider of the test track, the deflection optical detector emits a detection light signal through the laser transmitter and is received by the laser receiver through the optical detection square hole.

[0017] Preferably, the precision detection component includes an auxiliary angle detection communicating vessel fixed to the inner wall of the detection platform, an electromagnet control base is arranged at the bottom of the auxiliary angle detection communicating vessel, a descent control electromagnet is arranged at the top of the electromagnet control base, the bottom of the auxiliary angle detection communicating vessel is sealed and slidably connected with a detection hydraulic rod magnetically attracted to the descent control electromagnet, and a spring touch assembly is arranged at the top of the auxiliary angle detection communicating vessel, the spring touch assembly consists of a spring touch rod and a reset spring, and when the descent control electromagnet is powered off, the spring touch rod moves outward and fits against the U-shaped auxiliary angle side of the orthogonal special-shaped plate.

[0018] Preferably, the outer surface of the detection hydraulic rod is electrically connected to an orientation detector via a touch conductive sheet, the height range of the touch conductive sheet is the bending range of the U-shaped auxiliary angle side load deflection test of the orthogonal special-shaped plate, and a power-off delay device is arranged in the orientation detector, and the orientation detector is turned on when the power-off delay device detects a power-off falling edge in the circuit.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In view of the problem that in the above-mentioned existing deflection test of orthogonal special-shaped plates, only a constant pressure is applied to the top fixed part during the inspection process, and the pressure position of the orthogonal special-shaped plate and the pressure size of the hydraulic equipment need to be adjusted multiple times, resulting in a long inspection time and reducing the efficiency of its load deflection inspection, a test stepper motor, an adjusting hydraulic sleeve, a deflection test roller and other devices are arranged to cooperate with each other. During the deflection test of the orthogonal special-shaped plate, the test stepper motor drives the pressure threaded rod to rotate, so that the hydraulic pressure in the adjusting hydraulic sleeve changes, thereby generating a test pressure that can be adjusted downward for the deflection test roller. At the same time, the lateral drive module is driven to rotate by the inspection servo motor, so that the lateral drive seat moves laterally, so that the deflection test roller can change the pressure position and pressure on the orthogonal special-shaped plate at any time, thereby improving the test efficiency during the alternating load deflection inspection of the orthogonal special-shaped plate.

[0021] 2. By setting up the test track fixed slider, the initial deflection lower limit slider and the track fixed plate and other devices to cooperate with each other, when the deflection test is carried out on the orthogonal special-shaped plate, the initial deflection of the orthogonal special-shaped plate can be detected by the initial deflection lower limit slider and the lifting detection rod, and the bending curvature of the orthogonal special-shaped plate being tested can be reproduced by the spring touch pressure slider that applies pressure to the track adjustment slider, thereby ensuring that when the hydraulic pressure in the hydraulic sleeve is adjusted by the test stepper motor control, the precisely controlled pressure is transmitted to the bottom of the deflection test roller and converted into pressure on the plate surface, thereby improving the accuracy of the test results during the alternating load deflection test.

[0022] 3. By setting up optical detection square holes, deflection optical detectors, and azimuth detectors and other devices to cooperate with each other, after the alternating load test of the orthogonal special-shaped plate is completed, a light signal is sent to the laser receiver through the laser transmitter. When the orthogonal special-shaped plate fails the deflection test, the light signal received by the laser receiver is blocked by the fixed slider of the test track, that is, the rough detection result is unqualified. At this time, the hydraulic rod is attached to the side of the U-shaped auxiliary angle of the orthogonal special-shaped plate to detect its concave and convex parts. Therefore, when the deflection of the orthogonal special-shaped plate is detected to be unqualified, it is known whether the specific problem occurs in the U-shaped auxiliary angle or the top of the plate surface. Then, by combining the rough detection component and the fine detection component, the unqualified deflection point of the orthogonal special-shaped plate can be quickly located, thereby improving the positioning efficiency during the alternating load deflection detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a steel structure detection device for bridge maintenance proposed by the present invention;

[0024] Figure 2 This is an exploded view of the overall structure inside the initial detection wall of a steel structure detection device for bridge maintenance proposed by the present invention;

[0025] Figure 3 This is a schematic diagram of the deflection detection drive mechanism structure of a steel structure detection device for bridge maintenance proposed by the present invention;

[0026] Figure 4 For the present invention Figure 3 A magnified view of the structure at center A;

[0027] Figure 5 This is an exploded view of the overall structure of a precision detection component of a steel structure detection device for bridge maintenance proposed by the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of a spring-touching pressurized slider of a steel structure detection device for bridge maintenance proposed by the present invention;

[0029] Figure 7 A schematic diagram of the internal structure of the cross section of an adjusting hydraulic sleeve and a deflection test sleeve of a steel structure detection device for bridge maintenance proposed by the present invention;

[0030] Figure 8 For the present invention Figure 7 A magnified view of the structure at B in the middle;

[0031] Fig. 9 A schematic diagram of the internal structure of the cross section of an auxiliary angle detection communicating vessel of a steel structure detection device for bridge maintenance proposed by the present invention;

[0032] Fig.10 For the present invention Fig. 9 A magnified view of the structure at center C.

[0033] In the figure: 1. test bench; 2. port positioning bracket; 21. limit support slider; 22. U-shaped auxiliary angle support seat; 3. test stabilizing bracket; 31. test servo motor; 32. drive gear set; 321. driving wheel; 322. driven wheel; 33. transverse drive module; 34. pressurizing base; 341. transverse drive slide bar; 35. transverse drive seat; 351. test stepper motor; 352. pressurizing threaded rod; 353. adjusting hydraulic sleeve; 354. adjusting pressurizing cover; 355. drive slider; 4. initial test wall; 41. initial deflection lower limit slide plate; 42. lower limit slide groove; 43. test track fixing slider; 4 31. Sliding roller; 432. Track adjustment slider; 433. Optical detection square hole; 44. Electric telescopic cylinder; 441. Track fixing plate; 442. Spring touch pressure slider; 5. Lifting detection rod; 51. Deflection test roller; 52. Detection conductive contact; 53. Deflection test sleeve; 531. Pressure slide cover; 532. Lifting control sleeve; 54. Detection alarm; 55. Spring positioning column; 6. Deflection optical detector; 61. Laser transmitter; 62. Laser receiver; 7. Auxiliary angle detection connector; 71. Detection hydraulic rod; 8. Electromagnet control base; 81. Lowering control electromagnet; 9. Azimuth detector. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] Reference Figure 1-10 A steel structure inspection device for bridge maintenance includes a test bench 1 for inspecting load deflection tests of orthogonal special-shaped plates, a test positioning mechanism is arranged on the top of the test bench 1, and the test positioning mechanism is used to stabilize the transverse ports of the orthogonal special-shaped plates. The test positioning mechanism includes a port positioning bracket 2 arranged on the top of the test bench 1, a limit support slider 21 is arranged on the top of the port positioning bracket 2 and is slidably connected to the edge of the transverse port of the orthogonal special-shaped plate, and a U-shaped auxiliary angle support seat 22 is fixed on the top of the port positioning bracket 2 and is slidably connected to the bottom of the orthogonal special-shaped plate;

[0036] A detection unit is arranged on the top of the detection platform 1, and the detection unit consists of an initial detection mechanism and a termination detection mechanism. The initial detection mechanism is used to detect the initial deflection of the orthogonal special-shaped plate, and the termination detection mechanism is used to detect the termination deflection of the orthogonal special-shaped plate. A deflection detection drive mechanism is arranged on the top of the detection platform 1, and the deflection detection drive mechanism provides stable drive for the detection unit.

[0037] like Figure 3-5 As shown, the deflection detection driving mechanism includes a detection stable bracket 3 arranged on the top of the detection platform 1, and a driving component is arranged on the left side of the detection stable bracket 3. The driving component is composed of a detection servo motor 31, a driving gear set 32 ​​and a lateral driving module 33. The outer surface of the lateral driving module 33 is transmission-connected with a pressurizing base 34;

[0038] The top of the pressurizing base 34 is slidably connected to a transverse driving seat 35 via a transverse driving slide rod 341 . A hydraulic driving component is provided on the top of the transverse driving seat 35 . The hydraulic driving component consists of a test stepping motor 351 , a pressurizing threaded rod 352 and an adjusting hydraulic sleeve 353 .

[0039] Through the above technical solution, the driving gear set 32 ​​is composed of a driving wheel 321 fixed to the output shaft of the detection servo motor 31 and a driven wheel 322 meshing with the driving wheel 321, and the inner wall of the adjusting hydraulic sleeve 353 is slidably connected to the adjusting pressure cover 354 threadedly connected to the pressure threaded rod 352.

[0040] Based on the above, after the orthogonal shaped plate is placed stably on the top of the port positioning bracket 2, the detection servo motor 31 is started so that the active wheel 321 drives the driven wheel 322 to rotate synchronously, thereby starting the screw set in the lateral drive module 33 to drive the pressurized base 34 laterally. At this time, the test stepper motor 351 is started to drive the pressurized threaded rod 352 to rotate, and the hydraulic pressure in the adjusting hydraulic sleeve 353 is adjusted, thereby generating downward pressure on the deflection test roller 51, squeezing the orthogonal shaped plate, so that the deflection, that is, the bending degree of the orthogonal shaped plate changes, and the adjustable lateral drive operation of squeezing the plate surface by the deflection test roller 51 during the load deflection test of the orthogonal shaped plate is completed.

[0041] like Figure 2 , Figure 7 and Figure 8As shown, the initial detection mechanism includes an initial detection wall 4 fixed on the top of the detection stability bracket 3 and a lifting detection rod 5 arranged at the bottom of the adjustment hydraulic sleeve 353, the initial detection wall 4 is symmetrically arranged, and an initial deflection lower limit slide plate 41 is fixedly installed inside the initial detection wall 4 through a hydraulic device, and an arc-shaped lower limit slide groove 42 is opened on the inner wall of the initial deflection lower limit slide plate 41, and the inner wall of the initial detection wall 4 is slidably connected with a test track fixed slider 43 through a compression spring, and the opposite side of a plurality of test track fixed sliders 43 form a deflection lower limit initial detection track through a sliding roller 431, and the front and rear sides of the adjustment hydraulic sleeve 353 are fixed with a driving slider 355 slidably connected to the deflection lower limit initial detection track, and during the lateral movement of the pressurized base 34, the lateral driving seat 35 that slides on the outer surface of the lateral driving slide rod 341 slides along the deflection lower limit initial detection track formed by a plurality of test track fixed sliders 43, so that the adjustment hydraulic sleeve 353 can only slide upward in the initial detection track;

[0042] Through the above technical solution, such as Figure 6 As shown, track adjustment sliders 432 are fixed to both the front and rear sides of the test track fixing slider 43, an electric telescopic cylinder 44 is fixed to the inner wall of the initial detection wall 4, a track fixing plate 441 is fixedly installed through a telescopic connecting rod, a spring touch pressurizing slider 442 is slidably connected to one side of the track fixing plate 441 close to the track adjustment slider 432, and the spring touch pressurizing slider 442 is in touch connection with the front side of the track adjustment slider 432;

[0043] Based on the above, a limit spring and a limit sleeve are arranged on the front side of the spring-touching pressurizing slider 442. During the continuous pressurization process of the electric telescopic cylinder 44, the limit spring is first used to push the spring-touching pressurizing slider 442 to squeeze the track adjusting slider 432, so that the test track fixed slider 43 can be initially stabilized, which is convenient for recording the deflection of the orthogonal special-shaped plate during the initial detection process, so that the pressure applied by the subsequent adjustment hydraulic sleeve 353 to the deflection test sleeve 53 is completely converted to the surface of the plate body, avoiding that the pressure applied by the test stepper motor 351 cannot be accurately controlled when detecting the orthogonal special-shaped plate whose bending curvature is smaller than the lower limit slide groove 42 due to the fixed height of the test track fixed slider 43;

[0044] Based on the above, after completing the initial deflection test of the orthogonal special-shaped plate, the electric telescopic cylinder 44 continues to apply pressure, so that the limit spring retracts into the limit sleeve, and the spring touches the pressure slider 442 through the limit sleeve and continues to apply pressure until the position of the test track fixed slider 43 is fixed, so that the bending curvature of the sliding track formed by the multiple sliding rollers 431 is the same as the bending curvature of the orthogonal special-shaped plate being tested, thereby completing the fixing operation of the test track during the deflection test of the orthogonal special-shaped plate.

[0045] like Figure 7 and Figure 8 As shown, the bottom of the lifting detection rod 5 is rotatably connected to a deflection test roller 51, and a detection conductive contact piece 52 is fixed to the outer surface of the lifting detection rod 5, the inner wall of the adjusting hydraulic sleeve 353 is sealed and slidably connected to the deflection test sleeve 53, and the inner wall of the deflection test sleeve 53 is provided with a detection alarm 54 for detecting the conductive contact piece 52 touching the electrical connection, and the detection alarm 54 is turned on by monitoring the falling edge of the power-off detection conductive contact piece 52.

[0046] Through the above technical scheme, the deflection test sleeve 53 is composed of a pressure slide cover 531 which is sealingly and slidingly connected to the inner wall of the adjusting hydraulic sleeve 353 and a lifting control sleeve 532 fixed to the bottom of the pressure slide cover 531. A positioning groove is provided on the inner wall of the lifting control sleeve 532, and a spring positioning column 55 which is slidingly connected to the positioning groove is provided on the side wall of the lifting detection rod 5.

[0047] Based on the above, when the orthogonal shaped plate is placed from the back of the test bench 1 to the top of the port positioning bracket 2, there is an initial deflection due to the limitation of its own material. At this time, when the lateral drive seat 35 is driven to move horizontally by the lateral drive module 33, the adjustment hydraulic sleeve 353 can only slide upward along the initial detection track and cannot slide downward, that is, at this time, the curvature of the orthogonal shaped plate with qualified initial deflection must be smaller than the curvature of the lower limit slide 42. When the initial deflection of the orthogonal shaped plate is unqualified, the deflection test roller 51, by its own weight, fits downward with the orthogonal shaped plate, so that the detection conductive contact 52 moves downward, generates a power-off falling edge, and turns on the detection alarm 54, prompting the quality inspector that the initial deflection of the orthogonal shaped plate detected is unqualified, thereby completing the initial deflection detection operation of the orthogonal shaped plate;

[0048] Based on the above, during the initial deflection detection process, the test stepper motor 351 drives the pressurized threaded rod 352 to rotate, so that the internal liquid of the adjusting hydraulic sleeve 353 moves upward, driving the spring positioning column 55 to touch the disengagement sleeve arranged at the bottom of the adjusting hydraulic sleeve 353, so that the spring positioning column 55 slides to the inner wall of the lifting detection rod 5, and the lifting detection rod 5 can slide downward at this time. After the initial deflection detection is completed, the test stepper motor 351 drives the pressurized threaded rod 352 to rotate, so that the internal liquid of the adjusting hydraulic sleeve 353 moves downward, and drives the deflection test sleeve 53 to move downward. At this time, the spring positioning column 55 is engaged with the positioning groove opened on the inner wall of the deflection test sleeve 53, so that the deflection test roller 51 can always fit the top of the orthogonal special-shaped plate and will not drop to trigger the detection alarm 54. This is the process of the height of the lifting detection rod 5 from being able to slide downward to being stable, that is, the evolution from the initial deflection detection process of the orthogonal special-shaped plate to the deflection test process.

[0049] like Figure 3As shown, the termination detection mechanism is composed of a coarse detection component arranged inside the initial detection wall 4 and a fine detection component arranged inside the detection platform 1. The coarse detection component is used to detect the overall deflection of the orthogonal special-shaped plate, and the fine detection component is used to detect the partial deflection of the orthogonal special-shaped plate. The coarse detection component includes a deflection optical detector 6 arranged inside the initial detection wall 4. The deflection optical detector 6 is composed of a laser transmitter 61 and a laser receiver 62. An optical detection square hole 433 for detecting the deflection range after the test is opened inside the fixed slider 43 of the test track. The deflection optical detector 6 emits a detection light signal through the laser transmitter 61, which passes through the optical detection square hole 433 and is received by the laser receiver 62.

[0050] Through the above technical solution, when the orthogonal shaped plate with qualified initial deflection is subjected to the deflection test, the test stepper motor 351 controls the rotation of the pressurizing threaded rod 352, and the hydraulic pressure in the adjusting hydraulic sleeve 353 is adjusted at any time, so that the hydraulic pressure in the adjusting hydraulic sleeve 353 is converted to the pressure of the deflection test roller 51 on the surface of the orthogonal shaped plate during the rolling process, so as to avoid the steel structure detection device being unable to simulate the actual situation to detect the surface of the orthogonal shaped plate due to the constant downward pressure and pressure point during the deflection test. This is the pressure adjustment process during the deflection test of the orthogonal shaped plate;

[0051] Based on the above, the laser transmitter 61 transmits a light signal to the laser receiver 62 through the optical detection square hole 433. When the bending exceeds the qualified height during the deflection test of the orthogonal special-shaped plate, the optical detection square hole 433 is separated from the light signal propagation path, so that the test track fixed slider 43 blocks the light signal emitted by the laser transmitter 61, so that the light signal cannot be received at the laser receiver 62. At this time, it indicates that the rough detection of the deflection of the orthogonal special-shaped plate is unqualified. This is the rough detection process of the deflection of the orthogonal special-shaped plate.

[0052] like Fig. 9 and Fig.10 As shown, the precision detection component includes an auxiliary angle detection communicating vessel 7 fixed to the inner wall of the detection platform 1, an electromagnet control base 8 is arranged at the bottom of the auxiliary angle detection communicating vessel 7, a descent control electromagnet 81 is arranged at the top of the electromagnet control base 8, a detection hydraulic rod 71 which is magnetically attracted to the descent control electromagnet 81 is sealed and slidably connected at the bottom of the auxiliary angle detection communicating vessel 7, and a spring touch assembly is arranged at the top of the auxiliary angle detection communicating vessel 7, the spring touch assembly consists of a spring touch rod and a reset spring, and when the descent control electromagnet 81 is powered off, the spring touch rod moves outward and fits against the U-shaped auxiliary angle side of the orthogonal special-shaped plate.

[0053] Through the above technical scheme, the outer surface of the hydraulic rod 71 is electrically connected to the orientation detector 9 through the touch conductive sheet. The height range of the touch conductive sheet is the bending range of the U-shaped auxiliary angle side load deflection test of the orthogonal special-shaped plate. A power-off delay device is arranged in the orientation detector 9. When the power-off delay device detects a power-off falling edge in the circuit, the orientation detector 9 is turned on.

[0054] Based on the above, when the rough inspection of the deflection of the orthogonal special-shaped plate fails, the current in the electromagnet control base 8 that leads to the descent control electromagnet 81 is disconnected, so that the detection hydraulic rod 71 can move toward the side of the U-shaped auxiliary angle of the orthogonal special-shaped plate along with the reset spring until it is in contact with it. The relative position of the touch conductive sheets arranged on the surface of the multiple detection hydraulic rods 71 ​​and the orientation detector 9 changes. When the touch conductive sheets are separated from the orientation detector 9, a power-off falling edge is generated. At this time, the power-off delay device is turned on, so that the alarm device connected to the orientation detector 9 sends a prompt to the quality inspector. Therefore, when the deflection of the orthogonal special-shaped plate is detected to be unqualified, it can be determined whether the specific problem occurs in the U-shaped auxiliary angle or the top board surface. This is the precise inspection process of the deflection of the orthogonal special-shaped plate.

[0055] When the load deflection test is performed on the orthogonal shaped plate, the edge of the transverse port of the orthogonal shaped plate is prevented from being in contact with the top of the test platform 1, and the edge of the transverse port is supported by the limit support slider 21, and then the edge area of ​​the transverse port at the bottom of the orthogonal shaped plate is placed on the top of the U-shaped auxiliary angle support seat 22 to support and position the U-shaped auxiliary angle bayonet at the bottom of the orthogonal shaped plate. This is a stable positioning operation before the load deflection test of the orthogonal shaped plate;

[0056] After the orthogonal shaped plate is stably placed on the top of the port positioning bracket 2, the detection servo motor 31 is started so that the active wheel 321 drives the driven wheel 322 to rotate synchronously, thereby starting the screw provided in the lateral drive module 33 to drive the pressurized base 34 laterally. At this time, the test stepper motor 351 is started to drive the pressurized threaded rod 352 to rotate, and the hydraulic pressure in the regulating hydraulic sleeve 353 is adjusted, thereby generating downward pressure on the deflection test roller 51 to squeeze the orthogonal shaped plate, so that the deflection, that is, the bending degree of the orthogonal shaped plate changes. This is the adjustable lateral drive process of squeezing the plate surface by the deflection test roller 51 during the load deflection test of the orthogonal shaped plate;

[0057] When the orthogonal shaped plate is placed from the back of the test bench 1 to the top of the port positioning bracket 2, there is an initial deflection due to the limitation of its own material. At this time, when the lateral drive seat 35 is driven to move horizontally by the lateral drive module 33, the adjustment hydraulic sleeve 353 can only slide upward along the initial detection track and cannot slide downward, that is, at this time, the curvature of the orthogonal shaped plate with qualified initial deflection must be smaller than the curvature of the lower limit slide 42. When the initial deflection of the orthogonal shaped plate is unqualified, the deflection test roller 51 fits downward with the orthogonal shaped plate by its own weight, so that the detection conductive contact 52 moves downward, generates a power-off falling edge, and turns on the detection alarm 54, prompting the quality inspector that the initial deflection of the orthogonal shaped plate detected is unqualified. This is the initial deflection detection process of the orthogonal shaped plate.

[0058] During the deflection pressure application process, the laser transmitter 61 transmits a light signal to the laser receiver 62 through the optical detection square hole 433. When the orthogonal profiled plate is bent beyond the qualified height during the deflection test, the optical detection square hole 433 is separated from the light signal propagation path, so that the test track fixed slider 43 blocks the light signal emitted by the laser transmitter 61, so that the laser receiver 62 cannot receive the light signal. At this time, it indicates that the rough detection of the orthogonal profiled plate deflection is unqualified. This is the rough detection process of the orthogonal profiled plate deflection.

[0059] Based on the above, when the rough inspection of the deflection of the orthogonal special-shaped plate fails, the current in the electromagnet control base 8 that leads to the descent control electromagnet 81 is disconnected, so that the detection hydraulic rod 71 can move toward the side of the U-shaped auxiliary angle of the orthogonal special-shaped plate along with the reset spring until it is in contact with it. The relative position of the touch conductive sheets arranged on the surface of the multiple detection hydraulic rods 71 ​​and the orientation detector 9 changes. When the touch conductive sheets are separated from the orientation detector 9, a power-off falling edge is generated. At this time, the power-off delay device is turned on, so that the alarm device connected to the orientation detector 9 sends a prompt to the quality inspector. Therefore, when the deflection of the orthogonal special-shaped plate is detected to be unqualified, it can be determined whether the specific problem occurs in the U-shaped auxiliary angle or the top board surface. This is the precise inspection process of the deflection of the orthogonal special-shaped plate.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel structure inspection device for bridge maintenance, comprising a test bench (1) for inspecting load deflection tests of orthogonal profiled plates, characterized in that: A test positioning mechanism is arranged on the top of the test bench (1), and the test positioning mechanism is used to stabilize the transverse port of the orthogonal shaped plate. The test positioning mechanism comprises a port positioning bracket (2) arranged on the top of the test bench (1), and a limit support slider (21) is arranged on the top of the port positioning bracket (2) and is slidably connected to the edge of the transverse port of the orthogonal shaped plate. A U-shaped auxiliary angle support seat (22) is fixed on the top of the port positioning bracket (2) and is slidably connected to the bottom of the orthogonal shaped plate. A detection unit is arranged on the top of the detection platform (1), and the detection unit is composed of an initial detection mechanism and a termination detection mechanism. The initial detection mechanism is used to detect the initial deflection of the orthogonal special-shaped plate, and the termination detection mechanism is used to detect the termination deflection of the orthogonal special-shaped plate. A deflection detection drive mechanism is arranged on the top of the detection platform (1), and the deflection detection drive mechanism provides stable drive for the detection unit.

2. A steel structure detection device for bridge maintenance according to claim 1, characterized in that: The deflection detection drive mechanism comprises a detection stabilizing bracket (3) arranged on the top of the detection platform (1); a driving component is arranged on the left side of the detection stabilizing bracket (3); the driving component is composed of a detection servo motor (31), a driving gear set (32) and a lateral driving module (33); the outer surface of the lateral driving module (33) is drivingly connected to a pressurizing base (34); The top of the pressurizing base (34) is slidably connected to a transverse driving seat (35) via a transverse driving slide rod (341), and a hydraulic driving component is arranged on the top of the transverse driving seat (35), and the hydraulic driving component is composed of a test stepping motor (351), a pressurizing threaded rod (352) and an adjusting hydraulic sleeve (353).

3. A steel structure detection device for bridge maintenance according to claim 2, characterized in that: The driving gear set (32) is composed of a driving wheel (321) fixed to the output shaft of the detection servo motor (31) and a driven wheel (322) meshing with the driving wheel (321), and the inner wall of the regulating hydraulic sleeve (353) is slidably connected to an regulating pressure cover (354) threadedly connected to the pressure threaded rod (352).

4. A steel structure detection device for bridge maintenance according to claim 3, characterized in that: The initial detection mechanism comprises an initial detection wall (4) fixed on the top of the detection stabilizing bracket (3) and a lifting detection rod (5) arranged at the bottom of the adjusting hydraulic sleeve (353); the initial detection wall (4) is symmetrically arranged, and an initial deflection lower limit slide plate (41) is fixedly installed inside the initial detection wall (4) through a hydraulic device; the inner wall of the initial deflection lower limit slide plate (41) is provided with an arc-shaped lower limit slide groove (42); the inner wall of the initial detection wall (4) is slidably connected to a test track fixed slider (43) through a compression spring, and the opposite sides of the plurality of test track fixed sliders (43) form a deflection lower limit initial detection track through a sliding roller (431); the front and rear sides of the adjusting hydraulic sleeve (353) are both fixed with a driving slider (355) slidably connected to the deflection lower limit initial detection track; The bottom of the lifting detection rod (5) is rotatably connected to a deflection test roller (51), and a detection conductive contact piece (52) is fixed to the outer surface of the lifting detection rod (5), the inner wall of the adjusting hydraulic sleeve (353) is sealingly and slidably connected to the deflection test sleeve (53), and the inner wall of the deflection test sleeve (53) is provided with a detection alarm (54) for detecting the conductive contact piece (52) touching the electrical connection, and the detection alarm (54) is turned on by monitoring the power-off falling edge of the detection conductive contact piece (52).

5. A steel structure detection device for bridge maintenance according to claim 4, characterized in that: The front and rear sides of the test track fixing slider (43) are both fixed with track adjustment sliders (432); the inner wall of the initial detection wall (4) is fixed with an electric telescopic cylinder (44); a track fixing plate (441) is fixedly installed via a telescopic connecting rod; a spring touch pressure slider (442) is slidably connected to a side of the track fixing plate (441) close to the track adjustment slider (432); and the spring touch pressure slider (442) is touch-connected to the front side of the track adjustment slider (432).

6. A steel structure detection device for bridge maintenance according to claim 4, characterized in that: The deflection test sleeve (53) is composed of a pressure slide cover (531) which is sealingly and slidably connected to the inner wall of the regulating hydraulic sleeve (353) and a lifting control sleeve (532) fixed to the bottom of the pressure slide cover (531). The inner wall of the lifting control sleeve (532) is provided with a positioning groove, and the side wall of the lifting detection rod (5) is provided with a spring positioning column (55) which is slidably connected to the positioning groove.

7. A steel structure detection device for bridge maintenance according to claim 4, characterized in that: The termination detection mechanism is composed of a rough detection component arranged inside the initial detection wall (4) and a fine detection component arranged inside the detection platform (1), the rough detection component is used to detect the overall deflection of the orthogonal shaped plate, and the fine detection component is used to detect the partial deflection of the orthogonal shaped plate, the rough detection component includes a deflection optical detector (6) arranged inside the initial detection wall (4), the deflection optical detector (6) is composed of a laser transmitter (61) and a laser receiver (62), an optical detection square hole (433) for detecting the deflection range after the test is opened inside the fixed slider (43) of the test track, and the deflection optical detector (6) emits a detection light signal through the laser transmitter (61) and passes through the optical detection square hole (433) and is received by the laser receiver (62).

8. A steel structure detection device for bridge maintenance according to claim 7, characterized in that: The precision detection component comprises an auxiliary angle detection communicating vessel (7) fixed to the inner wall of the detection platform (1); an electromagnet control base (8) is arranged at the bottom of the auxiliary angle detection communicating vessel (7); a descending control electromagnet (81) is arranged at the top of the electromagnet control base (8); a detection hydraulic rod (71) which is magnetically attracted to the descending control electromagnet (81) is sealed and slidably connected at the bottom of the auxiliary angle detection communicating vessel (7); a spring touch assembly is arranged at the top of the auxiliary angle detection communicating vessel (7); the spring touch assembly consists of a spring touch rod and a reset spring; when the descending control electromagnet (81) is powered off, the spring touch rod moves outward and fits with the U-shaped auxiliary angle side of the orthogonal special-shaped plate.

9. A steel structure detection device for bridge maintenance according to claim 8, characterized in that: The outer surface of the detection hydraulic rod (71) is electrically connected to an orientation detector (9) via a touch conductive sheet, the height range of the touch conductive sheet being the bending range of a U-shaped auxiliary angle side load deflection test of an orthogonal special-shaped plate, and a power-off delay device is arranged in the orientation detector (9), and the orientation detector (9) is turned on when the power-off delay device detects a power-off falling edge in the circuit.

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