Double-hook tightener dynamic and static load test method, test device and use method

Abstract

The invention discloses a dynamic and static load inspection device for a double-hook tightener. The dynamic and static load inspection device comprises a horizontal inspection frame, a fixed pull seat, a hydraulic mechanism with a pressure sensor, a movable pull seat, two connecting pull heads, a tightening control assembly, a deformation detection assembly and an inspection control system. The testing method comprises the following steps: S1, hooking double hooks of the double-hook tightener with two hooking ends of testing equipment respectively; s2, controlling the hooking end of the test equipment to be far away until the tension value of the double-hook tightener reaches a preset value; s3, a tightening device of the double-hook tightener is controlled to work until the double-hook tightener is shrunk to a preset value, and meanwhile, the tension value of the double-hook tightener is controlled to be maintained within the deviation range allowed by the preset value; and S4, stopping controlling the tightening device, and controlling the tension value of the double-hook tightener to be maintained within the deviation range allowed by the preset value until the preset time. According to the invention, automatic dynamic and static load detection of the double-hook tightener can be realized.

Description

Technical Field

[0001] This invention relates to the field of special instrument testing, specifically to a method, apparatus, and method of use for testing the dynamic and static loads of a double-hook tensioner. Background Technology

[0002] A wire tensioner, also known as a ratchet tensioner, is used to tighten conductors during overhead line installation. A wire tensioner with hooks at both ends is called a double-hook wire tensioner. Its tightening mechanism can be a ratchet mechanism, a screw mechanism, a hand-operated hoist, etc.

[0003] Double-hook wire tensioners are widely used, but the only local standard, DL / T 1741-2017 Preventive Test Procedures for Small Construction Tools for Power Operations, only specifies the test methods and requirements under static load. There are no comprehensive test standards for dynamic safety testing during daily use. Furthermore, there is no corresponding testing equipment suitable for dynamic use testing standards of double-hook wire tensioners. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a method, device and method of using a double hook tensioner for dynamic and static load testing, which can realize automated testing of the double hook tensioner for dynamic and static load.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] The dynamic and static load test method for double-hook tensioners includes the following steps:

[0007] S1. Connect the two hooks of the double hook tensioner to the two hook pull ends of the test equipment respectively;

[0008] S2. Control the hook end of the test equipment to move away until the tension value of the double hook tensioner reaches the predetermined value;

[0009] S3. Control the tightening device of the double hook tensioner to work, and control the double hook distance of the double hook tensioner to reduce until the double hook distance of the double hook tensioner is reduced to a predetermined value; at the same time, synchronously control and adjust the distance of the hook pull end of the control test equipment so that the tension value of the double hook tensioner is maintained within the allowable deviation range of the predetermined value.

[0010] S4. After stopping the control tightening device to reduce the distance between the two hooks of the double hook tensioner, maintain it for a predetermined time; during the predetermined time, adjust the distance of the hook pull end of the control test device in real time so that the tension value of the double hook tensioner is maintained within the allowable deviation range of the predetermined value.

[0011] During the above inspection process, observe the external condition of the double-hook tensioner in real time. If structural deformation or damage occurs, stop the inspection.

[0012] Furthermore,

[0013] In step S1, the initial state of the double-hook tensioner connected to the test equipment is the state where the distance between the two hooks is the longest.

[0014] In step S2, the tension value of the double hook tensioner is maintained for no less than one minute after reaching the predetermined value;

[0015] In step S3, under the control of the tightening device, the predetermined value of the reduction in the distance between the two hooks of the double hook tensioner is not less than half of the maximum distance between the two hooks.

[0016] In step S4, the tension value of the double-hook tensioner is not lower than the tension value maintained by the double-hook tensioner during the process of reducing the distance between the two hooks in step S3 within a predetermined time.

[0017] A dynamic and static load testing device for a double-hook tensioner includes:

[0018] Horizontal inspection rack;

[0019] A fixed pull seat is installed at one end of the horizontal inspection frame;

[0020] A hydraulic mechanism with pressure sensing is installed inside the horizontal inspection frame, directly opposite the fixed pull base;

[0021] The movable pull seat is located at the movable end of the hydraulic mechanism, directly opposite the fixed pull seat;

[0022] Two connecting pull heads are connected to a fixed pull base and a movable pull base respectively; the connecting pull heads are equipped with limit components that limit the movement of the hook pull heads of the double hook tensioner;

[0023] The tensioning control component is installed inside the horizontal inspection frame. It holds the tensioner of the double-hook tensioner and controls the tensioner to swing and tighten the double-hook tensioner.

[0024] The deformation detection component has its moving end located on the connecting pull head connected to the movable pull seat, and its fixed end connected to the horizontal inspection frame.

[0025] The inspection and control system controls the operation of the hydraulic system of the hydraulic mechanism, is electrically connected to the tensioning control component to control the swing of the tensioner, and is electrically connected to the deformation detection component to acquire the deformation signal of the double hook tensioner in real time.

[0026] Furthermore, the horizontal testing frame includes two parallel and spaced crossbeams, and the fixed support and hydraulic mechanism are both mounted on the two crossbeams;

[0027] The movable pull seat includes:

[0028] The untwisting ring has its tail end hinged to the movable end of the hydraulic mechanism.

[0029] Pull the head, the tail end is hinged to the head end of the untwisting ring, and the head end is connected to the connecting pull head;

[0030] The suspension frame is set above the pull head, connected to the pull head in the middle, and erected on the upper surface of two crossbeams on both sides;

[0031] The suspension frame includes:

[0032] The suspension beam is connected to the pull head in the middle.

[0033] Two suspension components are respectively installed at both ends of the suspension beam and overlap with two crossbeams; the suspension components include: a suspension plate and two rollers with rims; the suspension plate is fixedly connected to the end face of the suspension beam; the two rollers are rotatably installed on the suspension plate, with the wheel surface in contact with the upper surface of the crossbeam and the wheel rim located on the inner side of the crossbeam.

[0034] Furthermore, the deformation detection component includes:

[0035] The propulsion unit is mounted on the suspension beam;

[0036] The detection box is located on the crossbeam and has a strip-shaped notch that faces the push unit.

[0037] The displacement amplification unit is located inside the detection box, and its input end is connected to the drive unit.

[0038] The magnetic field unit is located inside the detection box;

[0039] The magnetic induction current acquisition block, made of metal, is set inside the magnetic field unit and connected to the output end of the displacement amplification unit. It moves within the magnetic field unit under the drive of the displacement amplification unit. The magnetic induction current acquisition block is electrically connected to the inspection and control system.

[0040] The displacement amplification unit includes:

[0041] The main slider is slidably disposed inside the detection box, and its sliding direction is parallel to the extension and retraction direction of the hydraulic mechanism; the main slider is provided with a socket for connection to the push unit;

[0042] The main hydraulic cylinder is installed inside the detection box, and its extension and retraction direction is parallel to the extension and retraction direction of the hydraulic mechanism. The main slider is connected to the extension and retraction end of the main hydraulic cylinder.

[0043] The secondary cylinder is located inside the detection box, and its extension and retraction direction is parallel to that of the hydraulic mechanism. The magnetic induction current acquisition block is connected to the extension and retraction end of the main cylinder. The oil chamber of the main cylinder is connected to the oil chamber of the secondary cylinder, and the diameter of the oil chamber of the secondary cylinder is smaller than that of the main cylinder.

[0044] Furthermore, the detection box is provided with two main guide directional limiting plates, and the opposite surfaces of the two main guide directional limiting plates are provided with main guide directional grooves; the main slider is located between the two main guide directional limiting plates, and a guide cylinder matching the width of the main guide directional groove is provided on the surface directly opposite to the main guide directional groove of the two main guide directional limiting plates; the main slider is hinged to the telescopic end of the main oil cylinder.

[0045] The detection box is equipped with two guide limiting plates, and the opposite surfaces of the two guide limiting plates are provided with guide grooves; the magnetic induction current acquisition block is located between the two guide limiting plates, and the surface directly opposite the guide grooves of the two guide limiting plates is provided with a guide rail that matches the width of the guide grooves;

[0046] The magnetic field unit includes two magnets, which are respectively arranged on both sides of the two guide limiting plates, forming magnetic field lines within the two guide limiting plates;

[0047] The deformation detection assembly also includes two conductive plates, which are respectively disposed on both sides of the magnetic induction current acquisition block. The magnetic induction current acquisition block has a spring top bead on the side facing the conductive plate. When the magnetic induction current acquisition block slides between the two guide limiting plates, the spring top bead electrically connects the magnetic induction current acquisition block to the two conductive plates. The two guide plates are electrically connected to the inspection control system.

[0048] Furthermore, the tensioning control assembly includes:

[0049] A planar displacement mechanism is installed inside a horizontal inspection frame;

[0050] The displacement platform is set on the displacement end of the planar displacement mechanism;

[0051] A servo motor is mounted on the displacement platform, and the axis of its rotating shaft is perpendicular to the plane of motion of the tensioner.

[0052] A sliding clamping unit is clamped and fixed on the tensioner;

[0053] The connecting arm is fixedly connected to the rotating shaft of the servo motor at one end and rotatably connected to the sliding clamping unit at the other end.

[0054] The sliding clamping unit includes:

[0055] A clamping plate is used to fix the wire tensioner to the clamping plate via a clamping strap; the clamping plate is provided with a clamping slide rail;

[0056] The clamping block is equipped with a clamping groove that matches the clamping slide rail. It is sleeved on the clamping slide rail and rotatably connected to the connecting arm.

[0057] Furthermore, the connecting pull head includes:

[0058] The connecting plate has a central hole at its center, through which it is hinged to the fixed pull base; the connecting plate has a plurality of connecting holes evenly distributed in a circular array.

[0059] The pull member is I-shaped; the two wing plates at the tail end of the pull member are fastened to the surface of the connecting plate and are rotatably connected to a connecting hole of the connecting plate by fixing bolts; the head end of the pull member is provided with a movable bolt, and the hook pull head of the double hook tensioner hooks onto the movable bolt between the two wing plates at the head end of the pull member;

[0060] The limiting component includes:

[0061] The limiting block is set between the two wing plates of the pull member by the limiting bolt, and limits the retraction of the hook pull head of the double hook tensioner that is hooked on the movable bolt.

[0062] Furthermore, it also includes protective components; the protective components include:

[0063] The lower protective component is located directly below the hook of the double-hook tensioner under inspection, and its two ends are slidably connected to two connecting pull heads respectively; the two ends of the lower protective component or the connecting pull heads are provided with displacement grooves, and the lower protective component and the connecting pull heads are slidably connected through the displacement grooves; the lower protective component is misaligned with the two connecting pull heads when the two connecting pull heads are close to each other;

[0064] The upper protective component is a shielding mesh cover, which is slidably mounted above the horizontal inspection frame and can be moved to be directly above the hook of the double-hook tensioner during inspection.

[0065] The method for using the dynamic and static load testing device for the double hook tensioner includes the following steps:

[0066] SJ1. Connect the two hooks of the double hook tensioner to the connecting pull head hooks respectively;

[0067] SJ2, Install limit components;

[0068] SJ3, the inspection and control system controls the hydraulic mechanism to work, so that the double hook tensioner is straightened until the pressure value in the hydraulic mechanism is calculated and converted into the tension value of the double hook tensioner, and then stops when the predetermined value is reached.

[0069] SJ4, the inspection and control system controls the tensioning control component to work, causing the tensioner to swing; the inspection and control system acquires the pressure value in the hydraulic mechanism in real time and calculates and converts it into the tension value of the double hook tensioner, and synchronously controls the extension and retraction ends of the hydraulic mechanism to extend or shorten synchronously, maintaining the tension value of the double hook tensioner within the allowable deviation range of the predetermined value;

[0070] SJ5, the detection and control system calculates the reduction distance of the double hook distance of the double hook tensioner through the working status parameters of the tensioning control component. When the double hook distance of the double hook tensioner is reduced to the predetermined value, the inspection and control system controls the tensioning control component to stop working.

[0071] SJ6, the detection and control system controls the synchronous extension or retraction of the hydraulic mechanism's telescopic end to keep the double hook tensioner's tension value within the allowable deviation range of the predetermined value and maintain it for a predetermined time.

[0072] SJ7. In steps SJ1-SJ6, the inspection control system acquires the current value and rate of change of the deformation detection component in real time. When the current value and rate of change of the deformation detection component both exceed the predetermined value, the inspection control system controls the hydraulic mechanism to immediately release pressure and release the tension on the double hook tensioner. When the elongation of the double hook tensioner exceeds the predetermined value based on the current value, rate of change, and inspection time of the deformation detection component, the inspection control system controls the hydraulic mechanism to slowly release pressure and release the tension on the double hook tensioner.

[0073] SJ8. In steps SJ1-SJ6, observe the external condition of the double hook tensioner in real time. If structural deformation or damage occurs, the control system will immediately release the pressure of the hydraulic mechanism to release the tension on the double hook tensioner.

[0074] Because of the adoption of the above technical solution, the present invention has the following advantages:

[0075] 1. By applying load to the double-hook tensioner and simulating its worst-case scenario during daily dynamic use—that is, maintaining maximum tension during tightening—its safety during daily use was ensured. Simultaneously, after daily dynamic use, it was placed in a static state. The continuous application of dynamic and static loads effectively verified the safety of the double-hook tensioner.

[0076] 2. The inspection control system synchronously controls the extension and retraction of the hydraulic mechanism in real time to ensure that the tension of the double hook tensioner is within the predetermined value range during the inspection process, thus ensuring the accuracy of the dynamic load inspection. At the same time, during the static load inspection, the extension and retraction of the hydraulic mechanism is still controlled to ensure that the tension of the double hook tensioner is always at its maximum value, completely simulating the state under normal static load.

[0077] 3. The deformation detection component effectively calculates the continuous and stable load capacity of the double hook tensioner based on its tensile deformation and rate of change during the dynamic and static load test, and determines whether it is qualified. At the same time, it can also determine whether the double hook tensioner will break immediately by calculating the tensile deformation rate, so as to stop the test before the breakage and avoid damage to the test equipment or personnel.

[0078] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0079] Figure 1 This is a first three-dimensional structural schematic diagram of the dynamic and static load testing device for the double-hook tensioner in the embodiment;

[0080] Figure 2 yes Figure 1 Enlarged structural diagram at point A in the middle.

[0081] Figure 3 This is a front view structural diagram of the detection box and its internal components in the embodiment.

[0082] Figure 4 yes Figure 3 Schematic diagram of the structure at the BB section.

[0083] Figure 5 yes Figure 4 Schematic diagram of the structure at the CC section.

[0084] Figure 6 yes Figure 1 Enlarged structural diagram at point D.

[0085] Figure 7 yes Figure 1 Enlarged structural diagram at point E in the middle.

[0086] Figure 8 yes Figure 1 Enlarged structural diagram at point F.

[0087] Figure 9 This is a second three-dimensional structural schematic diagram of the dynamic and static load testing device for the double-hook tensioner in the embodiment;

[0088] Figure 10 yes Figure 9 Enlarged structural diagram at point G in the middle.

[0089] Figure 11 This is a top view schematic diagram of the dynamic and static load testing device for the double-hook tensioner in the embodiment;

[0090] Figure 12 yes Figure 11 Enlarged structural diagram at point H.

[0091] In the picture:

[0092] 1. Horizontal testing frame; 11. Crossbeam;

[0093] 2. Fixed pull base;

[0094] 3. Hydraulic mechanism;

[0095] 41. Unscrewing ring; 42. Pulling head; 431. Suspension beam; 4321. Suspension plate; 4322. Roller;

[0096] 51. Connecting plate; 511. Connecting hole; 52. Pulling member; 521. Fixing bolt; 522. Movable bolt;

[0097] 61. Limiting block; 62. Limiting bolt;

[0098] 71. Planar displacement mechanism; 72. Displacement platform; 73. Servo motor; 741. Clamping plate; 7411. Clamping slide rail; 742. Clamping block; 7421. Clamping groove; 743. Clamping belt; 75. Connecting arm;

[0099] 81. Pushing unit; 82. Detection box; 821. Strip notch; 83. Displacement amplification unit; 831. Main slider; 8311. Guide cylinder; 8312. Socket; 832. Main cylinder; 833. Slave cylinder; 841. Magnet; 85. Magnetic induction current acquisition block; 851. Slave guide rail; 852. Spring ball; 86. Main directional limiting plate; 861. Main directional groove; 87. Slave guide limiting plate; 871. Slave guide groove; 88. Conductive plate;

[0100] 91. Lower protective assembly; 92. Upper protective assembly; 93. Displacement chute;

[0101] 100. Double hook tensioner; 101. Hook puller head; 102. Tensioner. Detailed Implementation

[0102] The present invention will be further described below with reference to the embodiments.

[0103] Example:

[0104] like Figures 1 to 12 As shown, a dynamic and static load testing device for a double-hook tensioner 100 includes:

[0105] Horizontal inspection rack;

[0106] Fixed bracket 2 is installed at one end of the horizontal inspection frame;

[0107] The hydraulic mechanism 3 with pressure sensing is installed inside the horizontal inspection frame, directly opposite the fixed pull seat 2;

[0108] The movable pull seat is located at the movable end of the hydraulic mechanism 3, directly opposite the fixed pull seat 2;

[0109] Two connecting pull heads are connected to the fixed pull base 2 and the movable pull base respectively; the connecting pull heads are provided with limiting components that limit the pull head 101 of the double hook tensioner 100;

[0110] The tensioning control assembly is installed inside the horizontal inspection frame, which clamps the tensioner 102 of the double hook tensioner 100 and controls the tensioner 102 to swing and tighten the double hook tensioner 100.

[0111] The deformation detection component has its moving end located on the connecting pull head connected to the movable pull seat, and its fixed end connected to the horizontal inspection frame.

[0112] The inspection and control system controls the operation of the hydraulic system of the hydraulic mechanism 3, is electrically connected to the tensioning control component to control the swing of the tensioner 102, and is electrically connected to the deformation detection component to acquire the deformation signal of the double hook tensioner 100 in real time.

[0113] The hydraulic mechanism 3 with pressure sensor includes a hydraulic system and a hydraulic cylinder. In this embodiment, the hydraulic cylinder is installed in a horizontal inspection frame. The tension on the double-hook tensioner 100 is calculated by detecting the pressure value of the hydraulic cylinder. The inspection control system uses a conventional inspection computer, signal receiving equipment (receiving the cylinder pressure value of the hydraulic mechanism 3 and the electrical signal of the deformation detection component), signal transmitting equipment (controlling the tensioning control component and the hydraulic system), and an internally independently programmed inspection program.

[0114] In this embodiment, the horizontal testing frame 11 includes two parallel and spaced crossbeams 11, and the fixed pull seat 2 and the hydraulic mechanism 3 are both mounted on the two crossbeams 11.

[0115] The movable pull seat includes:

[0116] The tail end of the unwinding ring 41 is hinged to the movable end of the hydraulic mechanism 3.

[0117] Pull head 42, the tail end of which is hinged to the head end of untwisting ring 41, and the head end is connected to the connecting pull head;

[0118] The suspension frame is set above the pull head 42, connected to the pull head 42 in the middle, and erected on the upper surface of the two crossbeams 11 on both sides;

[0119] The suspension frame includes:

[0120] The suspension beam 431 is connected to the pull head 42 in the middle.

[0121] Two suspension components are respectively installed at both ends of the suspension beam 431 and overlap with two crossbeams 11; the suspension components include: a suspension plate 4321 and two rimmed rollers 4322; the suspension plate 4321 is fixedly connected to the end face of the suspension beam 431; the two rollers 4322 are rotatably installed on the suspension plate 4321, the wheel surface is in contact with the upper surface of the crossbeam 11, and the wheel rim is located inside the crossbeam 11.

[0122] The unwinding ring 41 is a thrust bearing structure with a limit position, meaning that the two ends of the unwinding ring 41 can rotate independently and can withstand a certain amount of tension. During the inspection process, it can resist the tightening of the double hook tensioner 100, release the torque at both ends of the double hook tensioner 100, and ensure that the double hook tensioner 100 only bears tension during the inspection process, thus ensuring the accuracy of the inspection.

[0123] In this embodiment, the deformation detection component includes:

[0124] The pushing unit 81 is mounted on the suspension beam 431;

[0125] The detection box 82 is located on the crossbeam 11 and has a strip-shaped notch 821 that is directly opposite the push unit 81;

[0126] The displacement amplification unit 83 is installed inside the detection box 82, and its input end is connected to the push unit 81.

[0127] The magnetic field unit is located inside the detection box 82;

[0128] The magnetic induction current acquisition block 85 is made of metal and is set inside the magnetic field unit. It is connected to the output terminal of the displacement amplification unit 83 and is displaced within the magnetic field unit under the drive of the displacement amplification unit 83. The magnetic induction current acquisition block 85 is electrically connected to the inspection and control system.

[0129] The displacement amplification unit 83 includes:

[0130] The main slider 831 is slidably disposed inside the detection box 82, and its sliding direction is parallel to the extension and retraction direction of the hydraulic mechanism 3; the main slider 831 is provided with an insertion hole 8312 for connection with the push unit 81;

[0131] The main oil cylinder 832 is installed inside the detection box 82, and its extension and retraction direction is parallel to the extension and retraction direction of the hydraulic mechanism 3. The main slider 831 is connected to the extension and retraction end of the main oil cylinder 832.

[0132] The slave cylinder 833 is installed inside the detection box 82, and its extension and retraction direction is parallel to that of the hydraulic mechanism 3. The magnetic induction current acquisition block 85 is connected to the extension and retraction end of the main cylinder 832. The oil chamber of the main cylinder 832 is connected to the oil chamber of the slave cylinder 833, and the diameter of the oil chamber of the slave cylinder 833 is smaller than that of the oil chamber of the main cylinder 832.

[0133] The pushing unit 81 is a rod fixed to the suspension beam 431. It moves with the suspension beam 431, that is, with the moving end of the double-hook tensioner 100. During this movement, it pushes the main slider 831, causing the main cylinder 832 to extend and retract. This forces the liquid inside the main cylinder 832 to flow back and forth between the secondary cylinder 833 and the main cylinder 832, ultimately causing the end of the secondary cylinder 833 to move. Since the diameter of the oil chamber in the secondary cylinder 833 is smaller than that in the main cylinder 832, the magnetic induction current acquisition block 85 will be located at a multiple of the main slider 831, smoothly and infinitely amplifying the minute displacement of the main slider 831 proportionally.

[0134] The magnetic induction current acquisition block 85 will generate an induced current when it is displaced in a magnetic field. The inspection and control system calculates the rate of change of the induced current based on the magnitude (positive or negative) of the acquired induced current. At the same time, the displacement of the magnetic induction current acquisition block 85 can be obtained by time integration in combination with the inspection time. Then, by combining the ratio of the oil chamber diameter of the hydraulic cylinder 833 to the oil chamber diameter of the main hydraulic cylinder 832, the displacement of the movable end of the double hook tensioner 100 can be accurately calculated.

[0135] In this embodiment, the detection box 82 is provided with two main guide directional limiting plates 86, and the opposite surfaces of the two main guide directional limiting plates 86 are provided with main guide directional grooves 861; the main slider 831 is located between the two main guide directional limiting plates 86, and the surface directly opposite to the main guide directional grooves 861 of the two main guide directional limiting plates 86 is provided with a guide cylinder 8311 that matches the width of the main guide directional grooves 861; the main slider 831 is hinged to the telescopic end of the main hydraulic cylinder 832;

[0136] The detection box 82 is provided with two guide limiting plates 87, and the opposite surfaces of the two guide limiting plates 87 are provided with guide grooves 871; the magnetic induction current acquisition block 85 is located between the two guide limiting plates 87, and the surface directly opposite to the guide grooves 871 of the two guide limiting plates 87 is provided with a guide rail 851 that matches the width of the guide grooves 871;

[0137] The magnetic field unit includes two magnets 841, which are respectively disposed on both sides of the two guide limiting plates 87, forming magnetic field lines within the two guide limiting plates 87.

[0138] The deformation detection assembly also includes two conductive plates 88, which are respectively disposed on both sides of the magnetic induction current acquisition block 85. The magnetic induction current acquisition block 85 has a spring top bead 852 on the side facing the conductive plate 88. When the magnetic induction current acquisition block 85 slides between the two guide limiting plates 87, the spring top bead 852 electrically connects the magnetic induction current acquisition block 85 to the two conductive plates 88. The two guide plates are respectively electrically connected to the inspection control system.

[0139] The main guide limiting plate 86 can guide and limit the displacement of the main slider 831. Simultaneously, its design, featuring a guide cylinder 8311 cooperating with the main guide groove 861 and a hinged connection between the main slider 831 and the telescopic end of the main cylinder 832, allows the axis of the insertion hole 8312 of the main slider 831 to have a certain angle with the insertion rod of the push unit 81. This prevents the push unit 81 insertion rod from failing to insert into the main slider 831 due to slight deformation, thus avoiding detection failure. This design also avoids the following situations: to achieve detection, it is necessary to moderately enlarge the diameter of the insertion hole 8312 to ensure that the push unit 81 insertion rod can still be inserted after a certain deformation; enlarging the diameter of the insertion hole 8312 will create a virtual amount between the main slider 831 and the push unit 81, ultimately leading to inaccurate detected displacement.

[0140] In this embodiment, the tensioning control component includes:

[0141] The planar displacement mechanism 71 is installed inside the horizontal inspection frame;

[0142] The displacement platform 72 is mounted on the displacement end of the planar displacement mechanism 71;

[0143] Servo motor 73 is mounted on displacement platform 72, and the axis of its rotating shaft is perpendicular to the motion plane of tensioner 102;

[0144] A sliding clamping unit is clamped and fixed on the tensioner 102;

[0145] The connecting arm 75 is fixedly connected at one end to the rotating shaft of the servo motor 73, and rotatably connected at the other end to the sliding clamping unit.

[0146] The sliding clamping unit includes:

[0147] The clamping plate 741 is fixed to the wire tensioner 102 by the clamping strap 743; the clamping plate 741 is provided with a clamping slide rail 7411.

[0148] The clamping block 742 is provided with a clamping groove 7421 that matches the clamping slide rail 7411. It is sleeved on the clamping slide rail 7411 and rotatably connected to the connecting arm 75.

[0149] The planar displacement mechanism 71 adopts a dual-axis slide rail structure, which can be moved to any point within its range, and can be locked by a top rod after displacement. The servo motor 73 is mounted on the displacement platform 72 by screws, so the direction of the rotating shaft can be adjusted arbitrarily to adapt to the operation of the tensioner 102 of different double hook tensioners 100.

[0150] The rotation of the servo motor 73 is converted into the oscillation of the tensioner 102 by the relative sliding of the clamping block 742 and the clamping plate 741, ultimately achieving the purpose of tightening.

[0151] In this embodiment, the connecting pull head includes:

[0152] The connecting plate 51 has a central hole at its center, through which it is hinged to the fixed pull base 2; the connecting plate 51 has a plurality of connecting holes 511 evenly distributed in a circular array.

[0153] The pull member 52 is I-shaped; the two wing plates at the tail end of the pull member 52 are fastened to the plate surface of the connecting plate 51 and are rotatably connected to a connecting hole 511 of the connecting plate 51 by fixing bolts 521; the head end of the pull member 52 is provided with a movable bolt 522, and the hook pull head 101 of the double hook tensioner 100 hooks onto the movable bolt 522 between the two wing plates at the head end of the pull member 52;

[0154] The limiting component includes:

[0155] The limiting block 61 is set between the two wing plates of the pull member 52 by the limiting bolt 62, and limits the retraction of the hook pull head 101 of the double hook tensioner 100 which is hooked on the movable bolt 522.

[0156] The limiting block 61 restricts the deformation of the hook pull head 101 of the double hook tensioner 100, preventing the hook pull head 101 of the double hook tensioner 100 from disengaging from the movable screw after deformation, thus ensuring safety during the process.

[0157] In this embodiment, a protective component is also included; the protective component includes:

[0158] The lower protective component is located directly below the hook of the double-hook tensioner 100 under inspection, and its two ends are slidably connected to two connecting pull heads respectively; the two ends of the lower protective component or the connecting pull heads are provided with displacement grooves 93, and the lower protective component is slidably connected to the connecting pull heads through the displacement grooves 93; the lower protective component is misaligned with the two connecting pull heads when the two connecting pull heads are close to each other;

[0159] The upper protective component is a shielding mesh cover, which is slidably installed above the horizontal inspection frame and can be moved to be directly above the double hook tensioner 100 hooks during inspection.

[0160] The upper protective component adopts a baffle structure, with wheels at its lower end allowing it to move on the horizontal testing frame 11, thereby shielding the double-hook tensioner 100 during inspection. In this embodiment, the lower protective component 91 adopts a grooved plate structure, effectively wrapping around the double-hook tensioner 100 during inspection. In this embodiment, the displacement groove 93 shown in the attached diagram is located on the pull member 52. Its length is relatively short and it is only used for static load testing of the double-hook tensioner 100. When dynamic load testing is required, the displacement groove 93 can be placed in the lower protective component. The length of the displacement groove 93 can be as long as possible to accommodate the tightening displacement of different models of double-hook tensioners 100.

[0161] The method of using the dynamic and static load testing device for the double hook tensioner 100 in this embodiment includes the following steps:

[0162] SJ1. Connect the two hooks of the double hook tensioner 100 to the connecting pull head hooks respectively;

[0163] SJ2, Install limit components;

[0164] SJ3, the inspection and control system controls the hydraulic mechanism 3 to work, so that the double hook tensioner 100 is straightened until the pressure value in the hydraulic mechanism 3 is calculated and converted into the tension value of the double hook tensioner 100, and then stops.

[0165] SJ4, the inspection and control system controls the tensioning control component to work, causing the tensioner 102 to swing; the inspection and control system acquires the pressure value in the hydraulic mechanism 3 in real time and calculates and converts it into the tension value of the double hook tensioner 100, and synchronously controls the extension and retraction ends of the hydraulic mechanism 3 to extend or shorten synchronously, maintaining the tension value of the double hook tensioner 100 within the allowable deviation range of the predetermined value.

[0166] SJ5, the detection and control system calculates the reduction distance of the double hook distance of the double hook tensioner 100 by controlling the working status parameters of the tensioning control component. When the double hook distance of the double hook tensioner 100 is reduced to the predetermined value, the inspection and control system controls the tensioning control component to stop working.

[0167] SJ6, the detection and control system controls the extension or retraction of the hydraulic mechanism 3 synchronously, so that the double hook tensioner 100 maintains its tension value within the allowable deviation range of the predetermined value and maintains it for a predetermined time.

[0168] SJ7. In steps SJ1-SJ6, the inspection control system acquires the current value and rate of change of the deformation detection component in real time. When the current value and rate of change of the deformation detection component both exceed the predetermined value, the inspection control system controls the hydraulic mechanism 3 to immediately release pressure and release the tension on the double hook tensioner 100 to prevent the double hook tensioner 100 from breaking instantly. When the elongation of the double hook tensioner 100 exceeds the predetermined value based on the current value, rate of change, and inspection time of the deformation detection component, the inspection control system controls the hydraulic mechanism 3 to slowly release pressure and release the tension on the double hook tensioner 100, thereby determining whether the rope structure double hook tensioner 100 has become loose in its clamping and fixing.

[0169] SJ8. In steps SJ1-SJ6, observe the external condition of the double hook tensioner 100 in real time. If structural deformation or damage occurs, control the hydraulic mechanism 3 to immediately release pressure and release the tension on the double hook tensioner 100.

[0170] A method for testing the dynamic and static loads of a double-hook tensioner includes the following steps:

[0171] S1. Connect the two hooks of the double hook tensioner to the two hook pull ends of the test equipment respectively;

[0172] S2. Control the hook end of the test equipment to move away until the tension value of the double hook tensioner reaches the predetermined value;

[0173] S3. Control the tightening device of the double hook tensioner to work, and control the double hook distance of the double hook tensioner to reduce until the double hook distance of the double hook tensioner is reduced to a predetermined value; at the same time, synchronously control and adjust the distance of the hook pull end of the control test equipment so that the tension value of the double hook tensioner is maintained within the allowable deviation range of the predetermined value.

[0174] S4. After stopping the control tightening device to reduce the distance between the two hooks of the double hook tensioner, maintain it for a predetermined time; during the predetermined time, adjust the distance of the hook pull end of the control test device in real time so that the tension value of the double hook tensioner is maintained within the allowable deviation range of the predetermined value.

[0175] During the above inspection process, observe the external condition of the double-hook tensioner in real time. If structural deformation or damage occurs, stop the inspection.

[0176] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for testing the dynamic and static loads of a double-hook tensioner, characterized in that, Includes the following steps: S1. Connect the two hooks of the double hook tensioner to the two hook pull ends of the test equipment respectively; S2. Control the hook end of the test equipment to move away until the tension value of the double hook tensioner reaches the predetermined value; S3. Control the tightening device of the double hook tensioner to work, and control the double hook distance of the double hook tensioner to reduce until the double hook distance of the double hook tensioner is reduced to a predetermined value; at the same time, synchronously control and adjust the distance of the hook pull end of the control test equipment so that the tension value of the double hook tensioner is maintained within the allowable deviation range of the predetermined value. S4. After stopping the control tightening device to reduce the distance between the two hooks of the double hook tensioner, maintain it for a predetermined time; during the predetermined time, adjust the distance of the hook pull end of the control test device in real time so that the tension value of the double hook tensioner is maintained within the allowable deviation range of the predetermined value. During the above inspection process, observe the external condition of the double-hook tensioner in real time. If structural deformation or damage occurs, stop the inspection.

2. The method for testing the dynamic and static loads of a double-hook tensioner according to claim 1, characterized in that, In step S1, the initial state of the double-hook tensioner connected to the test equipment is the state where the distance between the two hooks is the longest. In step S2, the tension value of the double hook tensioner is maintained for no less than one minute after reaching the predetermined value; In step S3, under the control of the tightening device, the predetermined value of the reduction in the distance between the two hooks of the double hook tensioner is not less than half of the maximum distance between the two hooks. In step S4, the tension value of the double-hook tensioner is not lower than the tension value maintained by the double-hook tensioner during the process of reducing the distance between the two hooks in step S3 within a predetermined time.

3. A dynamic and static load testing device for a double-hook tensioner, characterized in that, include: Horizontal inspection rack; A fixed pull seat is installed at one end of the horizontal inspection frame; A hydraulic mechanism with pressure sensing is installed inside the horizontal inspection frame, directly opposite the fixed pull base; The movable pull seat is located at the movable end of the hydraulic mechanism, directly opposite the fixed pull seat; Two connecting pull heads are connected to a fixed pull base and a movable pull base respectively; the connecting pull heads are equipped with limit components that limit the movement of the hook pull heads of the double hook tensioner; The tensioning control component is installed inside the horizontal inspection frame. It holds the tensioner of the double-hook tensioner and controls the tensioner to swing and tighten the double-hook tensioner. The deformation detection component has its moving end located on the connecting pull head connected to the movable pull seat, and its fixed end connected to the horizontal inspection frame. The inspection and control system controls the operation of the hydraulic system of the hydraulic mechanism, is electrically connected to the tensioning control component to control the swing of the tensioner, and is electrically connected to the deformation detection component to acquire the deformation signal of the double hook tensioner in real time.

4. The dynamic and static load testing device for double-hook tensioners according to claim 3, characterized in that, The horizontal testing frame includes two parallel and spaced crossbeams. The fixed support and hydraulic mechanism are both mounted on the two crossbeams. The movable pull seat includes: The untwisting ring has its tail end hinged to the movable end of the hydraulic mechanism. Pull the head, the tail end is hinged to the head end of the untwisting ring, and the head end is connected to the connecting pull head; The suspension frame is set above the pull head, connected to the pull head in the middle, and erected on the upper surface of two crossbeams on both sides; The suspension frame includes: The suspension beam is connected to the pull head in the middle. Two suspension components are respectively installed at both ends of the suspension beam and overlap with two crossbeams; the suspension components include: a suspension plate and two rollers with rims; the suspension plate is fixedly connected to the end face of the suspension beam; the two rollers are rotatably installed on the suspension plate, with the wheel surface in contact with the upper surface of the crossbeam and the wheel rim located on the inner side of the crossbeam.

5. The dynamic and static load testing device for double-hook tensioners according to claim 4, characterized in that, The deformation detection component includes: The propulsion unit is mounted on the suspension beam; The detection box is located on the crossbeam and has a strip-shaped notch that faces the push unit. The displacement amplification unit is located inside the detection box, and its input end is connected to the drive unit. The magnetic field unit is located inside the detection box; The magnetic induction current acquisition block, made of metal, is set inside the magnetic field unit and connected to the output end of the displacement amplification unit. It moves within the magnetic field unit under the drive of the displacement amplification unit. The magnetic induction current acquisition block is electrically connected to the inspection and control system. The displacement amplification unit includes: The main slider is slidably disposed inside the detection box, and its sliding direction is parallel to the extension and retraction direction of the hydraulic mechanism; the main slider is provided with a socket for connection to the push unit; The main hydraulic cylinder is installed inside the detection box, and its extension and retraction direction is parallel to the extension and retraction direction of the hydraulic mechanism. The main slider is connected to the extension and retraction end of the main hydraulic cylinder. The secondary cylinder is located inside the detection box, and its extension and retraction direction is parallel to that of the hydraulic mechanism. The magnetic induction current acquisition block is connected to the extension and retraction end of the main cylinder. The oil chamber of the main cylinder is connected to the oil chamber of the secondary cylinder, and the diameter of the oil chamber of the secondary cylinder is smaller than that of the main cylinder.

6. The dynamic and static load testing device for double-hook tensioners according to claim 5, characterized in that, The detection box is equipped with two main guide directional limiting plates, and the opposite surfaces of the two main guide directional limiting plates are provided with main guide directional grooves; the main slider is located between the two main guide directional limiting plates, and a guide cylinder matching the width of the main guide directional groove is provided on the surface directly opposite to the main guide directional groove of the two main guide directional limiting plates; the main slider is hinged to the telescopic end of the main oil cylinder. The detection box is equipped with two guide limiting plates, and the opposite surfaces of the two guide limiting plates are provided with guide grooves; the magnetic induction current acquisition block is located between the two guide limiting plates, and the surface directly opposite the guide grooves of the two guide limiting plates is provided with a guide rail that matches the width of the guide grooves; The magnetic field unit includes two magnets, which are respectively arranged on both sides of the two guide limiting plates, forming magnetic field lines within the two guide limiting plates; The deformation detection assembly also includes two conductive plates, which are respectively disposed on both sides of the magnetic induction current acquisition block. The magnetic induction current acquisition block has a spring top bead on the side facing the conductive plate. When the magnetic induction current acquisition block slides between the two guide limiting plates, the spring top bead electrically connects the magnetic induction current acquisition block to the two conductive plates. The two guide plates are electrically connected to the inspection control system.

7. The dynamic and static load testing device for the double-hook tensioner according to claim 3, characterized in that, The tensioning control assembly includes: A planar displacement mechanism is installed inside a horizontal inspection frame; The displacement platform is set on the displacement end of the planar displacement mechanism; A servo motor is mounted on the displacement platform, and the axis of its rotating shaft is perpendicular to the plane of motion of the tensioner. A sliding clamping unit is clamped and fixed on the tensioner; The connecting arm is fixedly connected to the rotating shaft of the servo motor at one end and rotatably connected to the sliding clamping unit at the other end. The sliding clamping unit includes: A clamping plate is used to fix the wire tensioner to the clamping plate via a clamping strap; the clamping plate is provided with a clamping slide rail; The clamping block is equipped with a clamping groove that matches the clamping slide rail. It is sleeved on the clamping slide rail and rotatably connected to the connecting arm.

8. The dynamic and static load testing device for the double-hook tensioner according to claim 3, characterized in that, The connecting pull head includes: The connecting plate has a central hole at its center, through which it is hinged to the fixed pull base; the connecting plate has a plurality of connecting holes evenly distributed in a circular array. The pull member is I-shaped; the two wing plates at the tail end of the pull member are fastened to the surface of the connecting plate and are rotatably connected to a connecting hole of the connecting plate by fixing bolts; the head end of the pull member is provided with a movable bolt, and the hook pull head of the double hook tensioner hooks onto the movable bolt between the two wing plates at the head end of the pull member; The limiting component includes: The limiting block is set between the two wing plates of the pull member by the limiting bolt, and limits the retraction of the hook pull head of the double hook tensioner that is hooked on the movable bolt.

9. The dynamic and static load testing device for the double-hook tensioner according to claim 3, characterized in that, It also includes protective components; the protective components include: The lower protective component is located directly below the hook of the double-hook tensioner under inspection, and its two ends are slidably connected to two connecting pull heads respectively; the two ends of the lower protective component or the connecting pull heads are provided with displacement grooves, and the lower protective component and the connecting pull heads are slidably connected through the displacement grooves; the lower protective component is misaligned with the two connecting pull heads when the two connecting pull heads are close to each other; The upper protective component is a shielding mesh cover, which is slidably mounted above the horizontal inspection frame and can be moved to be directly above the hook of the double-hook tensioner during inspection.

10. The method of using the dynamic and static load testing device for the double-hook tensioner according to any one of claims 3-9, characterized in that, Includes the following steps: SJ1. Connect the two hooks of the double hook tensioner to the connecting pull head hooks respectively; SJ2, Install limit components; SJ3, the inspection and control system controls the hydraulic mechanism to work, so that the double hook tensioner is straightened until the pressure value in the hydraulic mechanism is calculated and converted into the tension value of the double hook tensioner, and then stops when the predetermined value is reached. SJ4, the inspection and control system controls the tensioning control component to work, causing the tensioner to swing; the inspection and control system acquires the pressure value in the hydraulic mechanism in real time and calculates and converts it into the tension value of the double hook tensioner, and synchronously controls the extension and retraction ends of the hydraulic mechanism to extend or shorten synchronously, maintaining the tension value of the double hook tensioner within the allowable deviation range of the predetermined value; SJ5, the detection and control system calculates the reduction distance of the double hook distance of the double hook tensioner through the working status parameters of the tensioning control component. When the double hook distance of the double hook tensioner is reduced to the predetermined value, the inspection and control system controls the tensioning control component to stop working. SJ6, the detection and control system controls the synchronous extension or retraction of the hydraulic mechanism's telescopic end to keep the double hook tensioner's tension value within the allowable deviation range of the predetermined value and maintain it for a predetermined time. SJ7. In steps SJ1-SJ6, the inspection control system acquires the current value and rate of change of the deformation detection component in real time. When the current value and rate of change of the deformation detection component both exceed the predetermined value, the inspection control system controls the hydraulic mechanism to immediately release pressure and release the tension on the double hook tensioner. When the elongation of the double hook tensioner exceeds the predetermined value based on the current value, rate of change, and inspection time of the deformation detection component, the inspection control system controls the hydraulic mechanism to slowly release pressure and release the tension on the double hook tensioner. SJ8. In steps SJ1-SJ6, observe the external condition of the double hook tensioner in real time. If structural deformation or damage occurs, the control system will immediately release the pressure of the hydraulic mechanism to release the tension on the double hook tensioner.

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