A device and method for detecting the tension of bridge steel cables

Abstract

The present invention provides a bridge cable tension detection device and detection method, which belongs to the technical field of cable tension detection. A bridge cable tension detection device and detection method, comprising a fixed frame, a group of supporting and unloading mechanisms are symmetrically arranged on both sides of the bottom of the front end of the fixed frame, the bottoms of both sides of the front end of the fixed frame are provided with strip-shaped through holes, and a group of lifting and feeding mechanisms are installed in the two strip-shaped through holes; a group of clamping and fixing mechanisms are installed at both ends of the front end surface of the fixed frame, an elastic detection mechanism is installed at the center of the front end of the fixed frame, a servo drive mechanism is provided on one side of the elastic detection mechanism, and a sensor detection mechanism is provided on the other side of the elastic detection mechanism. The present invention can automatically complete the tension detection of large-section bridge cables by designing an integrated lifting and feeding mechanism, a clamping and fixing mechanism, an elastic detection mechanism, a servo drive mechanism and a sensor detection mechanism, thereby greatly improving the detection efficiency and making the operation more convenient and quick.

Description

Technical Field

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

[0002] A tension meter is an instrument that measures the mutual pulling force between a wire mesh and a fixed contact body when tension is applied. It primarily uses a steel plate as a force-measuring element. When a tensioned wire rope is clamped between two stoppers, the clamping blocks serve as the fulcrum, and the force points are located between them. The tension of the wire rope pushes the clamping blocks, causing the steel plate to bend and deform. A push rod moves the pointer at the end of the sector gear shaft, which rotates on the dial plate, indicating the corresponding reading. A wire rope tension meter is used to measure wire rope tension (tensioning force) in industries such as aviation, automobiles, tractors, and construction. It has a simple structure and is easy to use, capable of measuring the tension of wire ropes of various specifications (diameters).

[0003] A steel cable tension meter is a low-cost, highly accurate, compact and lightweight precision instrument. Bridge cables are a common type of steel cables. Compared with ordinary steel cables, bridge cables have larger cross-sectional diameters and heavier mass. Ordinary steel cable tension meters are generally not suitable for tension detection of bridge cables. Moreover, during the actual detection process, both ends of the steel cable need to be fixed and the shape of the steel cable cannot be changed. Any change in the shape of the steel cable will cause a large change in tension. Therefore, during the actual detection process, bridge cables also need to be fixed at both ends using separate auxiliary fixing tools. This is not only inconvenient to operate, but also affects the accuracy of the test results if improperly fixed.

[0004] To this end, we have developed a new bridge cable tension detection device and detection method. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the present invention provides a bridge cable tension detection device and detection method, which solves the problem that the bridge cable has a larger cross-sectional diameter and heavier mass, and the tension of the bridge cable cannot be detected using an ordinary cable tension meter.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A bridge cable tension detection device includes a fixed frame, a group of supporting and unloading mechanisms are symmetrically arranged on both sides of the bottom of the front end of the fixed frame, two fixed blocks are fixedly connected near the center position on both sides of the front end surface of the fixed frame, and strip-shaped through holes are opened at the bottom of both sides of the front end of the fixed frame, and a group of lifting and loading mechanisms are installed in each of the two strip-shaped through holes;

[0010] A set of clamping and fixing mechanisms are installed at both ends of the front end surface of the fixing frame, an elasticity detection mechanism is installed at the center of the front end of the fixing frame, a servo drive mechanism is provided on one side of the elasticity detection mechanism, and a sensing detection mechanism is provided on the other side of the elasticity detection mechanism;

[0011] A hydraulic pump station corresponding to the lifting and feeding mechanism and the clamping and fixing mechanism is installed at the rear end of the inner surface of the bottom of the fixing frame.

[0012] Preferably, the fixing frame is designed as an L-shaped structure as a whole.

[0013] Through the above technical solution, the overall structure of the fixing frame with an L-shaped structure design is firm and stable, and can also achieve its own stable support and positioning.

[0014] Preferably, the supporting unloading mechanism includes a fixed roller, which is rotatably connected to one side of the bottom front end of the fixed frame, and a drive motor corresponding to the fixed roller is installed on one side of the bottom rear end of the fixed frame, and the central rotating shaft of the fixed roller is fixedly connected to the output shaft of the drive motor.

[0015] Through the above technical solution, during the inspection process, the two fixed rollers can form a stable support for the bridge steel cable to be inspected, thereby cooperating with the force applied by the movable roller to perform tension detection on the bridge steel cable to be inspected. When the inspection is completed, the movable roller and the two fixed clamps are reset. At this time, the two drive motors are started synchronously, and the two fixed rollers rotate in the same direction, thereby pushing the bridge steel cable to be inspected from either side of the fixed frame, thereby realizing automatic unloading.

[0016] Preferably, the lifting and loading mechanism includes a rotating shaft rotatably connected between the two sides of the inner wall of the strip through hole, the outer wall of the rotating shaft is fixedly connected to the main lifting frame, the bottom front end of the main lifting frame is fixedly connected to the front shovel part, the top center of the front shovel part is provided with a positioning groove, a folding groove is opened at the center position of the top outer surface of the main lifting frame, the bottom of the center of the folding groove is rotatably connected to a buffer plate, a positioning groove is opened at the bottom of the folding groove, and a buffer spring is fixedly connected in the positioning groove, the top of the buffer spring is fixedly connected to the buffer plate, the top rear end of the main lifting frame is fixedly connected to the first rotating support, and one side of the rear end surface of the fixed frame is fixedly connected to the second rotating support, and the second rotating support is rotatably connected to the lifting hydraulic cylinder, the bottom end of the piston rod of the lifting hydraulic cylinder is fixedly connected to the rotating bracket, and the rotating bracket is rotatably connected to the first rotating support.

[0017] Through the above technical solution, since the bottom of the front shovel part is flat, the bridge steel cable to be inspected that is cut into a cylindrical shape can be conveniently pushed to the top of the two front shovel parts and positioned between the two positioning grooves. The design of the positioning groove can realize the pre-positioning and limiting of the bridge steel cable to be inspected, and can prevent the two main lifting frames from rolling off the bridge steel cable to be inspected from the front ends of the two front shovel parts during the lifting process. After the positioning of the bridge steel cable to be inspected is completed, the two lifting hydraulic cylinders are started at the same time, and the two main lifting frames are driven forward by the extension of the piston rods of the two lifting hydraulic cylinders. The two front shovels slowly tilt upwards, and when the two main lifting frames are tilted to a certain angle, the bridge cable to be inspected will roll along the two main lifting frames toward the fixed frame, and the two sets of buffer plates and buffer springs will buffer the rolling bridge cable to be inspected. When the bridge cable to be inspected passes through the two buffer plates, the two tilted buffer plates and the buffer springs will reduce the speed and impact force of the bridge cable to be inspected during its rolling process, causing the bridge cable to be inspected to slowly roll between the two fixed rollers and the two fixed clamps, thereby achieving positioning and limiting.

[0018] Preferably, the clamping and fixing mechanism includes two support plates and two first mounting seats, the tops of the two support plates are fixedly connected to a fixed clamp seat, the two support plates and the fixed clamp seat are an integrated structure and are fixed to the bottom of one side of the front end of the fixing frame, the two first mounting seats are fixed to one side of the front end of the fixing frame by fixing screws, a clamping hydraulic cylinder is installed between the two first mounting seats, the bottom end of the clamping hydraulic cylinder piston rod is fixedly connected to a movable clamp seat, and positioning clamp grooves are provided on the top of the fixed clamp seat and the bottom of the movable clamp seat, and a plurality of anti-slip protrusions are provided in the two positioning clamp grooves.

[0019] Through the above technical solution, when the two ends of the bridge steel cable to be inspected are positioned in the two fixed clamps, the two clamping hydraulic cylinders are started synchronously, and the two movable clamps are used to cooperate with the two fixed clamps to clamp and fix the two ends of the bridge steel cable to be inspected. The multiple anti-slip protrusions arranged in the two sets of positioning clamp grooves can increase the clamping force and friction force between the bridge steel cable to be inspected, thereby ensuring that the two ends of the bridge steel cable to be inspected will not loosen during the inspection process, thereby further ensuring the accuracy of the inspection results.

[0020] The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket.

[0021] Through the above technical solution, when the two ends of the bridge cable to be inspected are clamped and fixed, the servo drive mechanism will slowly release the lifting seat, and under the elastic action of the detection spring, it will push the lifting seat downward in the opposite direction. When the movable roller initially contacts the bridge cable to be inspected, the lifting seat will continue to move downward until the detection pressure plate at the bottom of the lifting seat tightly presses the inductive strain gauge. After the lifting block descends and disengages from the lifting seat, the detection spring can apply pressure to the bridge cable to be inspected through the lifting seat and the movable roller. At this time, the tension of the bridge cable to be inspected will push the lifting rod downward in the opposite direction, and the force-applying detection pressure plate will cause the steel plate inductive strain gauge to be deformed under the force.

[0022] Preferably, the servo drive mechanism includes two fourth mounting seats, a ball screw is rotatably connected between the two fourth mounting seats, a servo motor corresponding to the ball screw is installed on the top of one of the fourth mounting seats, a ball nut seat is installed on the outer wall of the ball screw, and a lifting block corresponding to the lifting seat is fixedly connected to one side of the outer wall of the ball nut seat.

[0023] Through the above technical solution, before testing, the servo motor drives the ball screw to rotate, and when the ball screw rotates, it can drive the ball nut seat and the lifting block to rise and fall synchronously. During the rising process, the lifting block can push the lifting seat, the upper lifting rod, the fixed plate, the lower lifting rod, the rotating seat and the movable roller to move upward synchronously through direct contact with the lifting seat, so that the vertical distance between the movable roller and the two fixed rollers is increased to facilitate placing the bridge cable to be tested between the two fixed rollers. After the two ends of the bridge cable to be tested are clamped and fixed, the lifting block can be driven to descend by the reverse rotation of the servo motor output shaft, thereby realizing the slow release of the lifting seat and the movable roller. After the lifting block descends to disengage from the lifting seat, the movable roller will fully contact the bridge cable to be tested and apply pressure.

[0024] Preferably, the sensing detection mechanism includes an inductive strain gauge fixed to the top of the second mounting base, the rear end of the inductive strain gauge is connected to a connecting wire, a digital display is installed on the top of one side of the front end of the fixing frame, the other end of the connecting wire is electrically connected to the digital display, and the front end of the digital display is respectively provided with a display screen and multiple operation buttons.

[0025] Through the above technical solution, when the detection pressure plate contacts and presses the inductive strain gauge, deformation pressure will be generated on the surface of the inductive strain gauge. That is, the pressure of the detection pressure plate causes the inductive strain gauge to deform and produce a piezoelectric impedance effect, thereby converting the impedance change into an electrical signal. The electrical signal is then transmitted to the digital display via the connecting wire. The digital display amplifies the electrical signal and converts it into digital information, which is finally displayed on the display screen. The digital display value is the tension value of the bridge cable to be tested.

[0026] Preferably, the hydraulic pump station includes a pump station body installed and fixed on the inner surface of the bottom of the fixing frame, and the tops on both sides of the outer wall of the pump station body are fixedly connected with fixing seats, and the fixing seats are respectively provided with two oil outlet connection ports and two oil return connection ports.

[0027] Through the above technical solution, the pump station main body can provide hydraulic power for two sets of lifting and loading mechanisms and clamping and fixing mechanisms. The oil inlet and oil outlet on the lifting hydraulic cylinder and the clamping hydraulic cylinder can be connected to the corresponding oil outlet connection port and oil return connection port through the oil inlet pipe and the oil outlet pipe respectively to realize the connection of the oil circuit.

[0028] A method for detecting the tension of a bridge cable comprises the following specific steps:

[0029] S1. Cut and sample the bridge cables obtained from production and processing to obtain the bridge cables to be tested. The length of the bridge cables to be tested must be greater than or equal to the overall length of the fixing frame.

[0030] S2. Move the bridge cable to be inspected to the front end of the fixing frame and roll it into the positioning grooves on the top of the two front shovels;

[0031] S3. Simultaneously start the two lifting hydraulic cylinders. The extension of the piston rods of the two lifting hydraulic cylinders drives the two main lifting frames to rotate, causing the two front shovels to slowly tilt upward. When the two main lifting frames are tilted to a certain angle, the bridge cable to be inspected will roll along the two main lifting frames toward the fixed frame. The two sets of buffer plates and buffer springs will buffer the rolling bridge cable to be inspected, causing it to slowly roll between the two fixed rollers and the two fixed clamps, thereby achieving positioning and limiting.

[0032] S4. Synchronously start the two clamping hydraulic cylinders and use the two movable clamping seats and the two fixed clamping seats to clamp and fix the two ends of the bridge cable to be inspected;

[0033] S5. Start the servo motor, which drives the ball screw to rotate, causing the ball nut seat and the lifting block to slowly move downward. Under the elastic action of the detection spring, the detection spring pushes the lifting seat downward. When the movable roller contacts the bridge cable to be inspected, the lifting seat continues to move downward until the detection pressure plate at the bottom of the lifting seat tightly presses the inductive strain gauge and cannot move further downward.

[0034] S6, the induction strain gauge can convert the pressure signal fed back by the detection pressure plate into an electrical signal, which is then transmitted to the digital display via the connecting wire. The digital display amplifies the electrical signal and converts it into digital information, which is finally displayed on the display screen. The digital display value is the tension value of the bridge cable to be tested;

[0035] S7. After the inspection is completed, the servo drive mechanism drives the movable roller to rise and reset, and the two clamping hydraulic cylinders drive the fixed clamp seat to reset, so that the bridge cable to be inspected loses its fixing force;

[0036] S8. At this time, the two drive motors are started synchronously, driving the two fixed rollers to rotate, and then pushing the bridge cable to be inspected from either side of the fixed frame to achieve automatic unloading.

[0037] (3) Beneficial effects

[0038] The present invention provides a bridge cable tension detection device and detection method, which have the following beneficial effects:

[0039] 1. This bridge cable tension detection device and detection method, through the design of an integrated lifting and loading mechanism, clamping and fixing mechanism, elastic detection mechanism, servo drive mechanism and sensor detection mechanism, can automatically complete the tension detection of large-section bridge cables. It is not only more convenient and quick to operate and improve the detection efficiency, but also fills the gap in the current market for large-scale bridge cable tension detection equipment.

[0040] 2. This type of bridge cable tension detection device and detection method, through the design of a clamping and fixing mechanism, can use two movable clamps to cooperate with two fixed clamps to clamp and fix the two ends of the bridge cable to be tested, and the multiple anti-slip protrusions arranged in the two sets of positioning clamp grooves can increase the clamping force and friction force between the bridge cable to be tested, thereby ensuring that the two ends of the bridge cable to be tested will not loosen during the detection process, thereby further ensuring the accuracy of the detection results.

[0041] 3. This type of bridge cable tension detection device and detection method, through the design of a support unloading mechanism and a clamping and fixing mechanism, can quickly complete the support limit and two-end fixation of the bridge cable before detection, without the need for other auxiliary equipment, thereby making the detection process more convenient.

[0042] 4. This bridge cable tension detection device and detection method designs a strain-type sensing detection mechanism. When the detection pressure plate contacts and presses the inductive strain gauge, the pressure of the detection pressure plate will cause the inductive strain gauge to deform and produce a piezoelectric impedance effect, thereby converting the impedance change into an electrical signal. The digital display then amplifies the electrical signal and converts it into digital information, which is finally displayed on the display screen. This allows the tension value of the bridge cable to be obtained faster and more intuitively. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a three-dimensional structural diagram of the tension detection device of the present invention;

[0044] Figure 2 This is a front view of the tension detection device of the present invention;

[0045] Figure 3 This is a structural diagram of the steel cable detection state from a first perspective of the present invention;

[0046] Figure 4 This is a structural diagram of the steel cable detection state from a second perspective of the present invention;

[0047] Figure 5 This is a schematic diagram of the installation structure of the hydraulic pump station of the present invention;

[0048] Figure 6 It is a structural schematic diagram of the supporting unloading mechanism of the present invention;

[0049] Figure 7 It is a structural schematic diagram of the lifting and loading mechanism of the present invention;

[0050] Figure 8 It is a structural schematic diagram of the clamping and fixing mechanism of the present invention;

[0051] Figure 9 This is a structural diagram of the elasticity detection mechanism of the present invention from a first perspective;

[0052] Figure 10 This is a structural diagram of the elasticity detection mechanism of the present invention from a second perspective;

[0053] Figure 11 Schematic diagram of the structure of the sensing detection mechanism of the present invention;

[0054] Figure 12 FIG1 is an installation structure diagram of the servo drive mechanism of the present invention;

[0055] Figure 13 for Figure 10 A partial enlarged view of point A in the middle;

[0056] Figure 14 It is a structural schematic diagram of the hydraulic pump station of the present invention;

[0057] Figure 15 It is a schematic structural diagram of the bridge steel cable to be inspected according to the present invention.

[0058] Description of reference numerals:

[0059] 1. Fixed frame; 2. Support unloading mechanism; 201. Fixed roller; 202. Driving motor; 3. Fixed block; 4. Strip through hole; 5. Lifting and loading mechanism; 501. Rotating axis; 502. Main lifting frame; 503. Front shovel; 504. Positioning groove; 505. Folding groove; 506. Buffer plate; 507. Positioning groove; 508. Buffer spring; 509. First rotating support; 510. Second rotating support; 511. Lifting hydraulic cylinder; 512. Rotating bracket; 6. Clamping and fixing mechanism; 601. Support plate; 602. Fixed clamp seat; 603. First mounting seat; 604. Clamping hydraulic cylinder; 605. Movable clamp seat; 606. Positioning clamp groove; 607. Anti-slip protrusion; 7. Elasticity detection mechanism; 701. Second mounting seat; 702. Third mounting seat ;703, upper lifting rod;704, lower lifting rod;705, limiting slide;706, lifting seat;707, detection spring;708, detection pressure plate;709, fixed plate;710, connecting rod;711, limiting block;712, rotating seat;713, movable roller;8, servo drive mechanism;801, fourth mounting seat;802, ball screw;803, servo motor;804, ball nut seat;805, lifting block;9, sensing detection mechanism;901, induction strain gauge;902, connecting wire;903, digital display;904, display screen;905, operation button;10, hydraulic pump station;1001, pump station body;1002, fixed seat;1003, oil outlet connection port;1004, oil return connection port;11, bridge cable to be tested. DETAILED DESCRIPTION

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0061] Example:

[0062] like Figures 1-15As shown, an embodiment of the present invention provides a bridge cable tension detection device, including a fixing frame 1, the fixing frame 1 is designed in an L-shaped structure as a whole, the fixing frame 1 with an L-shaped structure is firm and stable as a whole, and can also achieve its own stable support and positioning;

[0063] like Figure 5-Figure 6 As shown, a group of supporting and unloading mechanisms 2 are symmetrically arranged on both sides of the bottom front end of the fixed frame 1, and the supporting and unloading mechanism 2 includes a fixed roller 201, which is rotatably connected to one side of the bottom front end of the fixed frame 1, and a driving motor 202 corresponding to the fixed roller 201 is installed on one side of the bottom rear end of the fixed frame 1. The central rotating shaft of the fixed roller 201 is fixedly connected to the output shaft of the driving motor 202. During the detection process, the two fixed rollers 201 can form a stable support for the bridge cable 11 to be detected, thereby cooperating with the force applied by the movable roller 713 to perform tension detection on the bridge cable 11 to be detected. When the detection is completed, the movable roller 713 and the two fixed clamps 602 are reset. At this time, the two driving motors 202 are started synchronously, and the two fixed rollers 201 rotate in the same direction, and then the bridge cable 11 to be detected can be pushed out from either side of the fixed frame 1, thereby realizing automatic unloading;

[0064] like Figure 6 As shown, two fixed stops 3 are fixedly connected to the front end of the fixing frame 1 near the center. The two fixed stops 3 can play a blocking and limiting role when the bridge cable 11 to be inspected rolls toward the fixing frame 1. After hitting the two fixed stops 3, the bridge cable 11 to be inspected will automatically fall on the two fixed rollers 201.

[0065] like Figure 7As shown, the bottom of both sides of the front end of the fixing frame 1 is provided with a strip through hole 4; a group of lifting and loading mechanisms 5 are installed in the two strip through holes 4, and the lifting and loading mechanisms 5 include a rotating shaft 501 rotatably connected between the two sides of the inner wall of the strip through hole 4, and the outer wall of the rotating shaft 501 is fixedly connected to the main lifting frame 502, and the bottom of the front end of the main lifting frame 502 is fixedly connected to the front shovel part 503, and the top center of the front shovel part 503 is provided with a positioning groove 504, and the center position of the outer surface of the top of the main lifting frame 502 is provided with a folding groove 505, and the bottom of the center of the folding groove 505 is rotatably connected to the buffer plate 506, and the inner bottom of the folding groove 505 A positioning groove 507 is provided on the top of the positioning groove 507, and a buffer spring 508 is fixedly connected in the positioning groove 507. The top of the buffer spring 508 is fixed to the buffer plate 506. The rear end of the top of the main lifting frame 502 is fixedly connected to the first rotating support 509. One side of the rear end surface of the fixed frame 1 is fixedly connected to the second rotating support 510. The second rotating support 510 is rotatably connected to the lifting hydraulic cylinder 511. The bottom end of the piston rod of the lifting hydraulic cylinder 511 is fixedly connected to the rotating support 512. The rotating support 512 is rotatably connected to the first rotating support 509. Since the bottom of the front shovel part 503 is flat, it is cut into a cylindrical shape. The bridge cable 11 to be inspected can be conveniently pushed to the top of the two front shovel parts 503 and positioned between the two positioning grooves 504. The design of the positioning grooves 504 can realize the pre-positioning and limiting of the bridge cable 11 to be inspected, and can prevent the two main lifting frames 502 from rolling off the front ends of the two front shovel parts 503 during the lifting process. After the positioning of the bridge cable 11 to be inspected is completed, the two lifting hydraulic cylinders 511 are started at the same time. The extension of the piston rods of the two lifting hydraulic cylinders 511 drives the two main lifting frames 502 to rotate, so that the two front shovel parts 503 slowly tilt upwards. When the two main lifting frames 502 are tilted to a certain angle, the bridge cable 11 to be inspected will roll along the two main lifting frames 502 toward the fixed frame 1, and the two sets of buffer plates 506 and buffer springs 508 will buffer the rolling bridge cable 11 to be inspected. When the bridge cable 11 to be inspected passes through the two buffer plates 506, the two tilted buffer plates 506 cooperate with the buffer springs 508 to reduce the speed and impact force of the bridge cable 11 to be inspected during the rolling process, so that the bridge cable 11 to be inspected slowly rolls between the two fixed rollers 201 and the two fixed clamping seats 602, thereby achieving positioning and limiting.

[0066] like Figure 8As shown, a set of clamping and fixing mechanisms 6 are installed at both ends of the front end surface of the fixing frame 1. The clamping and fixing mechanism 6 includes two support plates 601 and two first mounting seats 603. The tops of the two support plates 601 are fixedly connected with fixed clamping seats 602. The two support plates 601 and the fixed clamping seats 602 are an integrated structure and are fixed to the bottom of one side of the front end of the fixing frame 1. The two first mounting seats 603 are fixed to one side of the front end of the fixing frame 1 by fixing screws. A clamping hydraulic cylinder 604 is installed between the two first mounting seats 603. The bottom end of the piston rod of the clamping hydraulic cylinder 604 is fixedly connected with a movable clamping seat 605. The top of the fixed clamping seat 602 and the movable clamping seat 60 The bottom of each bridge cable 11 is provided with a positioning clamping groove 606, and a plurality of anti-slip protrusions 607 are provided in the two positioning clamping grooves 606. When the two ends of the bridge cable 11 to be inspected are positioned in the two fixed clamping seats 602, the two clamping hydraulic cylinders 604 are simultaneously activated, and the two movable clamping seats 605 cooperate with the two fixed clamping seats 602 to clamp and fix the two ends of the bridge cable 11 to be inspected. The plurality of anti-slip protrusions 607 provided in the two sets of positioning clamping grooves 606 can increase the clamping force and friction between the bridge cable 11 to be inspected, thereby ensuring that the two ends of the bridge cable 11 to be inspected will not loosen during the inspection process, thereby further ensuring the accuracy of the inspection results.

[0067] like Figure 9 、 Figure 10 and Figure 13As shown, an elastic detection mechanism 7 is installed at the front center of the fixing frame 1. The elastic detection mechanism 7 includes a second mounting seat 701 and a third mounting seat 702. The second mounting seat 701 and the third mounting seat 702 are fixed to the front center of the fixing frame 1 by a plurality of fixing screws. The center of the second mounting seat 701 is slidably connected to an upper lifting rod 703, and the center of the third mounting seat 702 is slidably connected to a lower lifting rod 704. Both sides of the outer walls of the upper lifting rod 703 and the lower lifting rod 704 are provided with limited sliding grooves 705. The inner walls of the central through holes of the mounting seat 701 and the third mounting seat 702 are both provided with limiting protrusions corresponding to the limiting slide grooves 705. The bottom end of the upper lifting rod 703 is fixedly connected to the lifting seat 706. The outer wall of the upper lifting rod 703 is sleeved with a detection spring 707. The bottom center of the lifting seat 706 is fixedly connected to a detection pressure plate 708. The outer wall of the lower lifting rod 704 is fixedly connected to a fixed plate 709 near the top. The front and rear end edges of the top of the fixed plate 709 are fixedly connected to the connecting rod 710. The two connecting rods 710 are fixedly connected. The top of each of the two connecting rods 710 passes through the lifting seat 706, and the tops of the two connecting rods 710 are fixedly connected to the limit block 711. The bottom end of the lower lifting rod 704 is fixedly connected to the rotating seat 712, and the rotating seat 712 is rotatably connected to the movable roller 713. When the two ends of the bridge cable 11 to be tested are clamped and fixed, the servo drive mechanism 8 will slowly release the lifting seat 706. Under the elastic action of the detection spring 707, the lifting seat 706 will be pushed downward in the reverse direction. When the movable roller 713 is initially in contact with the bridge cable 11 to be tested, the lifting seat 706 will be pushed downward in the reverse direction. After the first contact, the lifting seat 706 will continue to move downward until the detection pressure plate 708 at the bottom of the lifting seat 706 tightly presses the inductive strain gauge 901. After the lifting block 805 is lowered and out of contact with the lifting seat 706, the detection spring 707 can apply pressure to the bridge cable 11 to be tested through the lifting seat 706 and the movable roller 713. At this time, the tension of the bridge cable 11 to be tested will push the lower lifting rod 704 in the opposite direction, and the detection pressure plate 708 applying force will cause the steel plate inductive strain gauge 901 to deform under the force.

[0068] like Figure 11-12As shown, a servo drive mechanism 8 is provided on one side of the elasticity detection mechanism 7, and the servo drive mechanism 8 includes two fourth mounting seats 801, and a ball screw 802 is rotatably connected between the two fourth mounting seats 801. A servo motor 803 corresponding to the ball screw 802 is installed on the top of one of the fourth mounting seats 801, and a ball nut seat 804 is installed on the outer wall of the ball screw 802. A lifting block 805 corresponding to the lifting seat 706 is fixedly connected to one side of the outer wall of the ball nut seat 804. Before the detection, the servo motor 803 drives the ball screw 802 to rotate. When the ball screw 802 rotates, it can drive the ball nut seat 804 and the lifting block 805 to rise and fall synchronously. During the rising process, the lifting block 805 can be lifted by the lifting block 805. The direct contact of the lowering seat 706 pushes the lifting seat 706, the upper lifting rod 703, the fixed plate 709, the lower lifting rod 704, the rotating seat 712 and the movable roller 713 to move upward synchronously, so that the vertical distance between the movable roller 713 and the two fixed rollers 201 is increased, so as to facilitate the placement of the bridge cable 11 to be inspected between the two fixed rollers 201. After the two ends of the bridge cable 11 to be inspected are clamped and fixed, the lifting block 805 can be driven to descend by the reverse rotation of the output shaft of the servo motor 803, thereby realizing the slow release of the lifting seat 706 and the movable roller 713. After the lifting block 805 is lowered to the point of being out of contact with the lifting seat 706, the movable roller 713 will be in full contact with the bridge cable 11 to be inspected and apply pressure.

[0069] like Figure 11 and Figure 13 As shown, a sensing detection mechanism 9 is provided on the other side of the elastic detection mechanism 7. The sensing detection mechanism 9 includes an inductive strain gauge 901 fixed to the top of the second mounting seat 701. The rear end of the inductive strain gauge 901 is connected to a connecting wire 902. A digital display 903 is installed on the top of the front side of the fixing frame 1. The other end of the connecting wire 902 is electrically connected to the digital display 903. The front end of the digital display 903 is respectively provided with a display screen 904 and a plurality of operation buttons 905. When the detection pressure plate 708 contacts and presses the inductive strain gauge 901, deformation pressure is generated on the surface of the inductive strain gauge 901. That is, the pressure of the detection pressure plate 708 causes the inductive strain gauge 901 to deform and generate a piezoelectric impedance effect, thereby converting the impedance change into an electrical signal. The electrical signal is then transmitted to the digital display 903 via the connecting wire 902. The digital display 903 amplifies the electrical signal and converts it into digital information, which is finally displayed on the display screen 904. The digital display value is the tension value of the bridge cable 11 to be detected.

[0070] like Figure 14As shown, a hydraulic pump station 10 corresponding to the lifting and loading mechanism 5 and the clamping and fixing mechanism 6 is installed at the rear end of the bottom inner surface of the fixed frame 1. The hydraulic pump station 10 includes a pump station body 1001 installed and fixed on the bottom inner surface of the fixed frame 1. The tops on both sides of the outer wall of the pump station body 1001 are fixedly connected with fixed seats 1002. The fixed seats 1002 are respectively provided with two oil outlet connection ports 1003 and two oil return connection ports 1004. The pump station body 1001 can provide hydraulic power for two groups of lifting and loading mechanisms 5 and clamping and fixing mechanisms 6. The oil inlet and oil outlet on the lifting hydraulic cylinder 511 and the clamping hydraulic cylinder 604 can be connected to the corresponding oil outlet connection port 1003 and oil return connection port 1004 through the oil inlet pipe and the oil outlet pipe respectively to realize the connection of the oil circuit.

[0071] The method for detecting the tension of bridge cables includes the following specific steps:

[0072] S1. Cut and sample the bridge steel cables obtained from production and processing to obtain the bridge steel cables 11 to be tested. The length of the bridge steel cables 11 to be tested must be greater than or equal to the overall length of the fixing frame 1.

[0073] S2, move the bridge cable 11 to be inspected to the front end of the fixing frame 1, and roll it into the positioning groove 504 at the top of the two front shovel parts 503;

[0074] S3. Simultaneously start the two lifting hydraulic cylinders 511. The extension of the piston rods of the two lifting hydraulic cylinders 511 drives the two main lifting frames 502 to rotate, causing the two front shovel parts 503 to slowly tilt upward. When the two main lifting frames 502 are tilted to a certain angle, the bridge cable 11 to be inspected will roll along the two main lifting frames 502 toward the fixed frame 1. The two sets of buffer plates 506 and buffer springs 508 will buffer the rolling bridge cable 11 to be inspected, causing the bridge cable 11 to be inspected to slowly roll between the two fixed rollers 201 and the two fixed clamping seats 602, thereby achieving positioning and limiting.

[0075] S4. Synchronously start the two clamping hydraulic cylinders 604, and use the two movable clamping seats 605 to cooperate with the two fixed clamping seats 602 to clamp and fix the two ends of the bridge cable 11 to be inspected;

[0076] S5. Start the servo motor 803, which drives the ball screw 802 to rotate, causing the ball nut seat 804 and the lifting block 805 to slowly move downward. Under the elastic action of the detection spring 707, the detection spring 707 pushes the lifting seat 706 downward. When the movable roller 713 contacts the bridge cable 11 to be inspected, the lifting seat 706 continues to move downward until the detection pressure plate 708 at the bottom of the lifting seat 706 tightly presses the inductive strain gauge 901 and cannot move further downward.

[0077] S6. The inductive strain gauge 901 can convert the pressure signal fed back by the detection pressure plate 708 into an electrical signal, which is then transmitted to the digital display 903 via the connecting wire 902. The digital display 903 amplifies the electrical signal and converts it into digital information, which is finally displayed on the display screen 904. The digital display value is the tension value of the bridge cable 11 to be tested.

[0078] S7. After the inspection is completed, the servo drive mechanism 8 drives the movable roller 713 to rise and reset, and the two clamping hydraulic cylinders 604 drive the fixed clamp seat 602 to reset, so that the bridge cable 11 to be inspected loses its fixing force;

[0079] S8. At this time, the two driving motors 202 are started synchronously, and the two fixed rollers 201 are driven to rotate, thereby pushing the bridge cable 11 to be inspected out from either side of the fixed frame 1 to achieve automatic unloading.

[0080] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A bridge cable tension detection device, comprising a fixing frame (1), characterized in that: A group of supporting unloading mechanisms (2) are symmetrically arranged on both sides of the bottom of the front end of the fixing frame (1), two fixed blocks (3) are fixedly connected to the center of the front end surface of the fixing frame (1), and strip-shaped through holes (4) are opened at the bottom of both sides of the front end of the fixing frame (1), and a group of lifting and loading mechanisms (5) are installed in the two strip-shaped through holes (4); The lifting and feeding mechanism (5) comprises a rotating shaft (501) rotatably connected between two sides of the inner wall of the strip-shaped through hole (4); the outer wall of the rotating shaft (501) is fixedly connected to a main lifting frame (502); the front bottom of the main lifting frame (502) is fixedly connected to a front shovel portion (503); the top center of the front shovel portion (503) is provided with a positioning groove (504); the center position of the outer surface of the top of the main lifting frame (502) is provided with a folding groove (505); the bottom of the center of the folding groove (505) is rotatably connected to a buffer plate (506); the inner bottom of the folding groove (505) is provided with a positioning groove (507) ), a buffer spring (508) is fixedly connected in the positioning groove (507), the top end of the buffer spring (508) is fixed to the buffer plate (506), the top rear end of the main lifting frame (502) is fixedly connected to a first rotating support (509), one side of the rear end surface of the fixed frame (1) is fixedly connected to a second rotating support (510), a lifting hydraulic cylinder (511) is rotatably connected to the second rotating support (510), the bottom end of the piston rod of the lifting hydraulic cylinder (511) is fixedly connected to a rotating support (512), and the rotating support (512) is rotatably connected to the first rotating support (509); A set of clamping and fixing mechanisms (6) are installed at both ends of the front end surface of the fixing frame (1), an elasticity detection mechanism (7) is installed at the center of the front end of the fixing frame (1), a servo drive mechanism (8) is provided on one side of the elasticity detection mechanism (7), and a sensing detection mechanism (9) is provided on the other side of the elasticity detection mechanism (7); A hydraulic pump station (10) corresponding to the lifting and loading mechanism (5) and the clamping and fixing mechanism (6) is installed at the rear end of the inner surface of the bottom of the fixing frame (1).

2. A bridge cable tension detection device according to claim 1, characterized in that: The fixing frame (1) is designed as an L-shaped structure as a whole.

3. The bridge cable tension detection device according to claim 1, characterized in that: The supporting unloading mechanism (2) comprises a fixed roller (201), the fixed roller (201) being rotatably connected to one side of the bottom front end of the fixed frame (1), a driving motor (202) corresponding to the fixed roller (201) being installed on one side of the bottom rear end of the fixed frame (1), and a central rotating shaft of the fixed roller (201) being fixedly connected to an output shaft of the driving motor (202).

4. The bridge cable tension detection device according to claim 1, characterized in that: The clamping and fixing mechanism (6) includes two support plates (601) and two first mounting seats (603), the tops of the two support plates (601) are fixedly connected to a fixed clamp seat (602), the two support plates (601) and the fixed clamp seat (602) are an integrated structure and are fixed to the bottom of one side of the front end of the fixing frame (1), the two first mounting seats (603) are fixed to one side of the front end of the fixing frame (1) by fixing screws, a clamping hydraulic cylinder (604) is installed between the two first mounting seats (603), the bottom end of the piston rod of the clamping hydraulic cylinder (604) is fixedly connected to a movable clamp seat (605), the top of the fixed clamp seat (602) and the bottom of the movable clamp seat (605) are both provided with a positioning clamp groove (606), and a plurality of anti-slip protrusions (607) are provided in the two positioning clamp grooves (606).

5. The bridge cable tension detection device according to claim 1, characterized in that: The elastic detection mechanism (7) includes a second mounting seat (701) and a third mounting seat (702), the second mounting seat (701) and the third mounting seat (702) are fixed to the front center of the fixed frame (1) by a plurality of fixing screws, the center of the second mounting seat (701) is slidably connected to an upper lifting rod (703), the center of the third mounting seat (702) is slidably connected to a lower lifting rod (704), both sides of the outer walls of the upper lifting rod (703) and the lower lifting rod (704) are provided with limiting grooves (705), both sides of the inner walls of the central through holes of the second mounting seat (701) and the third mounting seat (702) are provided with limiting protrusions corresponding to the limiting grooves (705), the bottom end of the upper lifting rod (703) is fixed A lifting seat (706) is fixedly connected to the upper lifting rod (703), a detection spring (707) is sleeved on the outer wall of the upper lifting rod (703), a detection pressure plate (708) is fixedly connected to the center of the bottom of the lifting seat (706), a fixed plate (709) is fixedly connected to the outer wall of the lower lifting rod (704) near the top, and the front and rear end edges of the top of the fixed plate (709) are fixedly connected to the connecting rod (710), the top ends of the two connecting rods (710) pass through the lifting seat (706), and the top ends of the two connecting rods (710) are fixedly connected to the limiting block (711), the bottom end of the lower lifting rod (704) is fixedly connected to the rotating seat (712), and a movable roller (713) is rotatably connected inside the rotating seat (712).

6. The bridge cable tension detection device according to claim 5, characterized in that: The servo drive mechanism (8) includes two fourth mounting seats (801), a ball screw (802) is rotatably connected between the two fourth mounting seats (801), a servo motor (803) corresponding to the ball screw (802) is installed on the top of one of the fourth mounting seats (801), a ball nut seat (804) is installed on the outer wall of the ball screw (802), and a lifting block (805) corresponding to the lifting seat (706) is fixedly connected to one side of the outer wall of the ball nut seat (804).

7. The bridge cable tension detection device according to claim 6, characterized in that: The sensing detection mechanism (9) includes an inductive strain gauge (901) fixed to the top of the second mounting seat (701), the rear end of the inductive strain gauge (901) is connected to a connecting wire (902), a digital display (903) is installed on the top of one side of the front end of the fixing frame (1), the other end of the connecting wire (902) is electrically connected to the digital display (903), and the front end of the digital display (903) is respectively provided with a display screen (904) and a plurality of operation buttons (905).

8. The bridge cable tension detection device according to claim 7, characterized in that: The hydraulic pump station (10) comprises a pump station body (1001) mounted and fixed on the inner surface of the bottom of a fixing frame (1), the tops of both sides of the outer wall of the pump station body (1001) are fixedly connected to fixing seats (1002), and the fixing seats (1002) are respectively provided with two oil outlet connection ports (1003) and two oil return connection ports (1004).

9. A detection method for a bridge cable tension detection device according to any one of claims 1 to 8, characterized in that: The specific steps include: S1. Cut and sample the bridge steel cables obtained through production and processing to obtain the bridge steel cables (11) to be tested. The length of the bridge steel cables (11) to be tested must be greater than or equal to the overall length of the fixing frame (1); S2, moving the bridge cable (11) to be inspected to the front end of the fixing frame (1), and rolling it into the positioning grooves (504) at the top of the two front shovel parts (503); S3. Simultaneously start the two lifting hydraulic cylinders (511), and the extension of the piston rods of the two lifting hydraulic cylinders (511) drives the two main lifting frames (502) to rotate, so that the two front shovel parts (503) slowly tilt upwards. When the two main lifting frames (502) are tilted to a certain angle, the bridge steel cable (11) to be inspected will roll along the two main lifting frames (502) toward the fixed frame (1). The two sets of buffer plates (506) and buffer springs (508) will buffer the rolling bridge steel cable (11) to be inspected, so that the bridge steel cable (11) to be inspected will slowly roll between the two fixed rollers (201) and the two fixed clamping seats (602), and achieve positioning and limiting. S4, synchronously starting the two clamping hydraulic cylinders (604), and using the two movable clamping seats (605) in conjunction with the two fixed clamping seats (602) to clamp and fix the two ends of the bridge cable (11) to be inspected; S5. Start the servo motor (803), and the servo motor (803) drives the ball screw (802) to rotate, so that the ball nut seat (804) and the lifting block (805) slowly move downward. Under the elastic action of the detection spring (707), the detection spring (707) pushes the lifting seat (706) to move downward. When the movable roller (713) contacts the bridge cable (11) to be detected, the lifting seat (706) continues to move downward until the detection pressure plate (708) at the bottom of the lifting seat (706) tightly presses the induction strain gauge (901) and cannot move further downward; S6, the inductive strain gauge (901) converts the pressure signal fed back by the detection pressure plate (708) into an electrical signal, and then transmits the electrical signal to the digital display (903) via the connecting wire (902), and the digital display (903) amplifies the electrical signal and converts it into digital information, which is finally displayed on the display screen (904). The digital display value is the tension value of the bridge cable (11) to be tested; S7, after the inspection is completed, the servo drive mechanism (8) drives the movable roller (713) to rise and reset, and the two clamping hydraulic cylinders (604) drive the fixed clamp seat (602) to reset, so that the bridge cable to be inspected (11) loses its fixing force; S8. At this time, the two driving motors (202) are started synchronously, and the two fixed rollers (201) are driven to rotate, thereby pushing the bridge cable (11) to be inspected out from either side of the fixed frame (1), thereby realizing automatic unloading.

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