A hydraulic tensioning instrument for detecting cable tension and its use method

Abstract

The present invention provides a hydraulic tensioning instrument for detecting cable tension and a method for use thereof, belonging to the technical field of hydraulic tensioning equipment. The hydraulic tensioning instrument includes a through-type jack, a tensioning piston disposed within the through-type jack, an anchor groove formed at one end of the tensioning piston, an annular pressure sensor mounted within the anchor groove, an annular plate fixedly mounted on the mounting surface of the annular pressure sensor, two circular slots formed on the outer ring of the annular plate, and limiting mechanisms disposed on both sides of the tensioning piston, the limiting mechanisms being used to cooperate with the circular slots to secure the annular plate. The hydraulic tensioning instrument for detecting cable tension provided by the present invention has the advantages of effectively improving detection efficiency, reducing manpower input, and being able to quickly determine the flatness of the tool anchor contact surface in the pre-tensioning stage.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic tensioning equipment, and in particular to a hydraulic tensioning instrument for detecting cable tension and a use method thereof. Background Art

[0002] In the field of engineering construction such as bridges and buildings, cable tensioning construction is a key link to ensure structural stability and safety, and the precise detection of cable tension is an indispensable and important step in tensioning construction. At present, the industry generally uses hydraulic tensioning equipment for cable tensioning operations. It mainly consists of through-type jacks, supporting hydraulic stations and related anchors. The hydraulic station controls the extension and contraction of the tensioning piston in the through-type jack to achieve cable tensioning. In terms of cable tension detection, traditional methods mostly rely on the pressure instrument of the hydraulic station itself to indirectly infer the cable tension. In order to ensure the accuracy of tension detection, an additional tension tester is also required to detect the cable tension. The two test results are mutually verified to avoid excessive errors in the test results.

[0003] However, the cable tension detection method of the above-mentioned prior art requires the use of an additional wire tension detector to detect the cable tension, which makes the construction process more complicated, reduces the working efficiency, and also requires a large amount of manpower. Therefore, it is necessary to provide a hydraulic tensioning instrument for cable tension detection and a method of use to solve the above technical problems. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a hydraulic tensioning instrument and a method for using cable tension detection that does not require the use of an additional tension detector for detection during tensioning, can effectively improve detection efficiency and reduce manpower input, and can quickly judge the flatness of the tool anchor contact surface in the early stage of tensioning, avoiding pressure transmission deviation caused by uneven contact surface.

[0005] In order to solve the above technical problems, the present invention provides a hydraulic tensioner for detecting cable tension, comprising a through-type jack, a tensioning piston is provided in the through-type jack, an anchor groove is provided at one end of the tensioning piston, an annular pressure sensor is installed in the anchor groove, a boss is integrally formed on the top of the tensioning piston, an avoidance groove is provided on the inner wall of the anchor groove, a signal line interface of the annular pressure sensor is located in the avoidance groove, a mounting port connected to the avoidance groove is provided on the top of the boss, an annular plate is fixedly installed on the mounting surface of the annular pressure sensor, two circular slots are provided on the outer ring of the annular plate, and limiting mechanisms are provided on both sides of the tensioning piston, and the limiting mechanisms are used to cooperate with the circular slots to fix the annular plate;

[0006] Any one of the limiting mechanisms includes a circular insertion rod, a circular sleeve block, a first spring, a rotating hand rod and a locking piece. The circular insertion rod is slidably mounted on the outer wall of the tensioning piston, one end of the circular insertion rod extends into the corresponding circular slot, the circular sleeve block is fixedly sleeved on the outer wall of the circular insertion rod, the first spring is sleeved on the circular insertion rod, one end of the first spring is fixedly connected to the circular sleeve block, and the other end is fixedly connected to the tensioning piston, the rotating hand rod is rotatably mounted on one end of the circular insertion rod located outside the tensioning piston, the locking piece is fixedly mounted on the outer wall of the tensioning piston, and an L-shaped locking opening is provided on the locking piece.

[0007] Furthermore, a plurality of first positioning sliders are integrally formed on the outer ring of the annular plate, and a plurality of positioning slots are opened on the inner wall of the anchor groove. The plurality of first positioning sliders are all located in the corresponding positioning slots and are slidably connected to the inner walls of the corresponding positioning slots.

[0008] Furthermore, two C-shaped protective covers are fixedly mounted on the outer shell of the through-type jack, and the two limiting mechanisms are both located in the corresponding C-shaped protective covers.

[0009] Furthermore, the hydraulic tensioner for detecting cable tension also includes a tool anchor thrust contact surface detection mechanism for detecting the flatness of the tool anchor thrust contact surface, the tool anchor thrust contact surface detection mechanism includes a detection ring, an air supply assembly and a flash prompt assembly, the air supply assembly is installed on the outer shell of the through-type jack, the flash prompt assembly is installed on the top of the boss, the detection ring is installed in the anchor groove, and the detection ring contacts the pressure surface of the annular pressure sensor, an annular groove is provided on the outer wall of the detection ring away from the annular pressure sensor, the top of the detection ring is provided with an air intake connector located in the avoidance groove, the air intake connector is connected to the annular groove, the flash prompt assembly includes a trigger, and the air supply assembly is used to supply air to the annular groove and the trigger when the cable is tensioned.

[0010] Furthermore, the limiting mechanism also includes a connecting bar and a square rod, the square rod is slidably mounted on the outer wall of the tensioning piston, the connecting bar is fixedly mounted on the outer wall of the circular sleeve, the end of the connecting bar away from the circular sleeve is fixedly connected to the square rod, and two square slots are provided on the outer ring of the detection ring, and the ends of the two square rods close to each other extend into the corresponding square slots.

[0011] Preferably, the flash warning assembly also includes a connecting tube, a bellows, a fixed plate, a vertical plate, a limit switch and a flashing light. The fixed plate is fixedly mounted on the top of the boss, the trigger is mounted on the top of the fixed plate, the bottom end of the connecting tube is fixedly connected to the air intake joint, one end of the bellows is fixedly connected to the connecting tube, and the other end is connected to the trigger, the vertical plate is fixedly mounted on the top of the fixed plate, the limit switch is fixedly mounted on the outer wall of the vertical plate close to the trigger, the limit switch is located directly above the trigger, and the flashing light is fixedly mounted on the outer wall of the vertical plate away from the trigger.

[0012] Preferably, the gas delivery assembly includes a cylinder, a first piston and a hollow piston rod, the cylinder is fixedly mounted on the outer shell of the through-type jack, the first piston is slidingly and sealingly mounted in the cylinder, the hollow piston rod is fixedly mounted on the first piston, the hollow piston rod is away from the outside of the cylinder, and the hollow piston rod is slidingly and sealingly connected to the cylinder, an air outlet is provided on the outer wall of the hollow piston rod near the first piston, a fixing block is fixedly mounted on the top of the boss, one end of the hollow piston rod located outside the cylinder is connected to the fixing block, and the top end of the connecting pipe is fixedly connected to the hollow piston rod.

[0013] Preferably, the trigger includes an outer tube, a second piston, a telescopic rod, a second spring, a fixed rod and a contact head. The outer tube is fixedly mounted on the top of the fixed plate, the second piston is slidingly sealed and mounted in the outer tube, the telescopic rod is arranged in the outer tube, the bottom end of the telescopic rod is fixedly connected to the fixed plate, and the top end is fixedly connected to the bottom of the second piston, the second spring is sleeved on the outside of the telescopic rod, the top end of the second spring is fixedly connected to the second piston, and the bottom end is fixedly connected to the fixed plate, the fixed rod is fixedly mounted on the top of the second piston, the contact head is fixedly mounted on the top end of the fixed rod, and a pressure relief valve is fixedly mounted on the outer wall of the outer tube.

[0014] Furthermore, a door-shaped protective cover is fixedly installed on the top of the boss, and the flash prompt component is located inside the door-shaped protective cover.

[0015] To solve the above problems, the present invention further provides a method for using a hydraulic tensioning instrument for detecting cable tension, comprising the following steps:

[0016] T1: Connect the signal line of the annular pressure sensor to the matching digital display instrument;

[0017] T2: Pass the cable through the through-type jack, then put the tool anchor into the cable and push it into the anchor groove. Then clamp the clip on the outside of the cable and tamp it into the anchor hole of the tool anchor. Make sure the clip bites the cable evenly to prevent it from slipping.

[0018] T3: Start the through-type jack through the hydraulic station to extend the tensioning piston to tension the cable, and drive the cable to be tensioned to the designed initial stress;

[0019] T4: Control the through-type jack to perform staged pressure-raising tensioning. Hold the load for a certain period of time after each stage of tensioning. During the tensioning process, read the data displayed on the digital instrument and compare it with the data on the pressure gauge of the hydraulic station to ensure accurate tensioning force detection.

[0020] T5: After the designed tensioning force is reached and the load is stable, return the tensioning piston of the through-type jack, and then remove the tool anchor and jack.

[0021] Compared with related technologies, the hydraulic tensioning instrument for detecting cable tension and the method of use provided by the present invention have the following beneficial effects:

[0022] The present invention provides a hydraulic tensioning instrument for detecting cable tension. By integrating an annular pressure sensor in the anchor groove of a through-type jack, real-time detection of cable tension during the tensioning process is achieved. The annular pressure sensor directly bears the tensioning reaction force transmitted by the tool anchor. The detection data can be transmitted to a digital display instrument in real time via a signal line, and can be synchronously compared and verified with the instrument data of the hydraulic station. There is no need to use an additional tension detector for detection during tensioning, which simplifies the operation process, effectively improves detection efficiency, and reduces manpower input.

[0023] By setting up a tool anchor thrust contact surface detection mechanism, the flatness of the tool anchor contact surface can be quickly determined before tensioning, avoiding pressure transmission deviation caused by uneven contact surface, and ensuring the reliability of the annular pressure sensor detection data from the source;

[0024] The annular pressure sensor and the detection ring are limited by two limiting mechanisms, which enable both to be quickly installed and disassembled, ensuring the stability of component installation and facilitating subsequent maintenance and inspection, further improving the practicality and convenience of the equipment.

[0025] The present invention provides a method for using a hydraulic tensioning instrument for detecting cable tension. The method can synchronously detect the tension of the cable in real time through a pressure sensor without the need for tensioning, has the advantages of being easy to operate and can effectively improve detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a hydraulic tensioner for detecting cable tension provided by the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the structure of the hydraulic tensioner for detecting cable tension after removing the C-shaped protective cover and the door-shaped protective cover;

[0028] Figure 3 for Figure 2 A partial cross-sectional view of a hydraulic tensioner for detecting cable tension is shown;

[0029] Figure 4 for Figure 2 An enlarged schematic diagram of section A is shown;

[0030] Figure 5 for Figure 3 An enlarged schematic diagram of portion B is shown;

[0031] Figure 6 for Figure 4 A schematic structural diagram of the restriction mechanism shown;

[0032] Figure 7 for Figure 3 The structural diagram of the annular pressure sensor shown;

[0033] Figure 8 for Figure 3 Schematic diagram of the coordination of the annular pressure sensor, the detection ring and the limiting mechanism shown;

[0034] Figure 9 for Figure 3 The schematic structural diagram of the tool anchor thrust contact surface detection mechanism shown;

[0035] Figure 10 for Figure 9 An enlarged schematic diagram of section C is shown;

[0036] Figure 11 for Figure 9 A cross-sectional view of the gas delivery assembly shown;

[0037] Figure 12 for Figure 10 The schematic diagram of the structure of the trigger is shown.

[0038] Numbers in the figure:

[0039] 1. Through-type jack; 11. Tension piston; 12. Boss; 111. Anchor groove; 112. Avoidance groove; 113. Mounting port; 2. Annular pressure sensor; 21. Annular plate; 211. Round slot; 3. Detection ring; 31. Annular groove; 32. Square slot; 4. Limiting mechanism; 41. Round insert; 42. Round sleeve; 43. First spring; 44. Rotating handle; 45. Locking piece; 451. L-shaped lock; 46. Connecting strip ;47. Square plug rod; 5. Gas transmission assembly; 51. Cylinder; 52. First piston; 53. Hollow piston rod; 6. Flash prompt assembly; 61. Connecting pipe; 62. Bellows; 63. Fixed plate; 64. Vertical plate; 65. Trigger; 66. Travel switch; 67. Strobe light; 651. Outer cylinder; 652. Second piston; 653. Telescopic rod; 654. Second spring; 655. Fixed rod; 656. Contact head; 657. Pressure relief valve. DETAILED DESCRIPTION

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] First embodiment

[0042] Please refer to Figures 1-12 In the first embodiment of the present invention, a hydraulic tensioning instrument for detecting cable tension is proposed, which includes: a through-type jack 1, a tensioning piston 11 is provided in the through-type jack 1, an anchor groove 111 is provided at one end of the tensioning piston 11, the through-type jack 1 is controlled by a matching hydraulic station, an annular pressure sensor 2 is installed in the anchor groove 111, a boss 12 is integrally formed on the top of the tensioning piston 11, an avoidance groove 112 is provided on the inner wall of the anchor groove 111, a signal line interface of the annular pressure sensor 2 is located in the avoidance groove 112, and the boss 12 A mounting port 113 communicating with the avoidance groove 112 is provided on the top of the annular pressure sensor 2. The signal line passes through the mounting port 113 and is connected to the interface of the annular pressure sensor 2. The other end of the signal line is connected to the matching digital display instrument. The digital display instrument can be installed on the console of the hydraulic station to facilitate reading. An annular plate 21 is fixedly installed on the mounting surface of the annular pressure sensor 2. Two circular slots 211 are provided on the outer ring of the annular plate 21. A limiting mechanism 4 is provided on both sides of the tensioning piston 11. The limiting mechanism 4 is used to cooperate with the circular slot 211 to fix the annular plate 21;

[0043] Specifically, any one of the limiting mechanisms 4 includes a circular insertion rod 41, a circular sleeve block 42, a first spring 43, a rotating hand lever 44 and a locking piece 45. The circular insertion rod 41 is slidably mounted on the outer wall of the tensioning piston 11, and one end of the circular insertion rod 41 extends into the corresponding circular slot 211. The connection between the end face of the end and the outer peripheral wall is a rounded corner design, which facilitates the smooth insertion of the circular insertion rod 41 into the circular slot 211. The circular sleeve block 42 is fixedly sleeved on the outer wall of the circular insertion rod 41, and the first spring 43 is sleeved on the circular insertion rod 41. One end of the first spring 43 is fixedly connected to the circular sleeve block 42, and the other end is fixedly connected to the tensioning piston 11. The rotating hand lever 44 is rotatably mounted on the circular insertion rod 41 at the tensioning piston. 11, a locking piece 45 is fixedly mounted on the outer wall of the tensioning piston 11, and an L-shaped locking opening 451 is provided on the locking piece 45. When the annular pressure sensor 2 needs to be repaired, the circular insertion rod 41 is pulled to one side by the rotating handle 44, and the end of the circular insertion rod 41 located in the anchor groove 111 will exit the circular slot 211. When the rotating handle 44 moves to the position of the L-shaped locking opening 451, the rotating handle 44 is rotated to make it enter the L-shaped locking opening 451. This prevents the circular insertion rod 41 from resetting itself under the tension of the first spring 43. After the connection between the signal line and the interface on the annular pressure sensor 2 is subsequently released, the annular pressure sensor 2 can be taken out of the anchor groove 111.

[0044] In this embodiment, in order to be able to position the annular pressure sensor 2, a plurality of first positioning sliders are integrally formed on the outer ring of the annular plate 21, and a plurality of positioning grooves are opened on the inner wall of the anchor groove 111. The plurality of first positioning sliders are all located in the corresponding positioning grooves and are slidably connected to the inner walls of the corresponding positioning grooves.

[0045] In this embodiment, in order to protect the limiting mechanism 4, two C-shaped protective covers are fixedly installed on the outer shell of the through-type jack 1. In the initial state, the two limiting mechanisms 4 are located in the corresponding C-shaped protective covers. When the tensioning piston 11 is extended, the limiting mechanism 4 moves with the tensioning piston 11 and moves to the outside of the C-shaped protective cover. After the tensioning piston 11 is reset, the limiting mechanism 4 is reset to the C-shaped protective cover, thereby preventing the components from being accidentally touched during daily transportation and causing damage.

[0046] In this embodiment, the hydraulic tensioner for detecting cable tension also includes a tool anchor thrust contact surface detection mechanism for detecting the flatness of the tool anchor thrust contact surface. After the tool anchor is installed in the anchor groove 111, its thrust contact surface fits with the detection ring 3 mentioned below. The tool anchor thrust contact surface detection mechanism includes a detection ring 3, an air supply component 5 and a flash prompt component 6. The air supply component 5 is installed on the outer shell of the through-type jack 1, and the flash prompt component 6 is installed on the top of the boss 12. The detection ring 3 is installed in the anchor groove 111, and the detection ring 3 is in contact with the pressure surface of the annular pressure sensor 2. An annular groove 31 is provided on the outer wall of the detection ring 3 away from the annular pressure sensor 2. When the thrust contact surface of the tool anchor is relatively flat, it will fit with the side of the detection ring 3 having the annular groove 31, and the annular groove 31 can be closed. After air is input into the annular groove 31, the air will not leak out or will leak out extremely slowly. On the contrary, when the thrust contact surface of the tool anchor is poorly flat, it cannot fit well with the detection ring 3. After air is input into the annular groove 31, the air will leak out quickly. The top of the detection ring 3 is provided with an air intake connector located in the avoidance groove 112, and the air intake connector is connected to the annular groove 31. The flash prompt component 6 includes a trigger 65, and the air supply component 5 is used to supply air to the annular groove 31 and the trigger 65 when the line is tensioned.

[0047] In order to enable the detection ring 3 to be positioned, a plurality of second positioning sliders are integrally formed on the outer ring of the detection ring 3. The plurality of second positioning sliders are respectively located in corresponding positioning slots and are slidably connected to the inner walls of the corresponding positioning slots;

[0048] In order to be able to limit the detection ring 3, the limiting mechanism 4 also includes a connecting strip 46 and a square plug rod 47. The square plug rod 47 is slidably installed on the outer wall of the tensioning piston 11, and the connecting strip 46 is fixedly installed on the outer wall of the circular sleeve block 42. The end of the connecting strip 46 away from the circular sleeve block 42 is fixedly connected to the square plug rod 47. Two square slots 32 are provided on the outer ring of the detection ring 3. The ends of the two square plug rods 47 close to each other extend into the corresponding square slots 32. The width of the square slot 32 is greater than the square plug rod 47. When the annular pressure sensor 2 is deformed under pressure, the detection ring 3 is allowed to axially displace a certain distance in the direction of the annular pressure sensor 2.

[0049] In this embodiment, the flash prompt assembly 6 also includes a connecting tube 61, a bellows 62, a fixing plate 63, a vertical plate 64, a limit switch 66 and a flash light 67. The fixing plate 63 is fixedly mounted on the top of the boss 12, and the trigger 65 is mounted on the top of the fixing plate 63. The bottom end of the connecting tube 61 is fixedly connected to the air intake joint. The connecting tube 61 is an engineering plastic hard tube that can undergo a certain deformation when subjected to force. One end of the bellows 62 is fixedly connected to the connecting tube 61, and the other end is connected to the trigger 65. The vertical plate 64 is fixedly mounted on the top of the fixed plate 63, the limit switch 66 is fixedly mounted on the outer wall of the vertical plate 64 close to the trigger 65, and the limit switch 66 is located directly above the trigger 65. The flashing light 67 is fixedly mounted on the outer wall of the vertical plate 64 away from the trigger 65. A set of normally open points on the limit switch 66 are connected in series to the power supply circuit of the flashing light 67. When the trigger 65 triggers the limit switch 66 to operate, the power supply circuit of the flashing light 67 is completed and it will be illuminated.

[0050] Specifically, the gas delivery assembly 5 includes a cylinder 51, a first piston 52 and a hollow piston rod 53. The cylinder 51 is fixedly mounted on the outer shell of the through-type jack 1, the first piston 52 is slidingly and sealingly mounted in the cylinder 51, and the hollow piston rod 53 is fixedly mounted on the first piston 52. The hollow piston rod 53 is away from the outside of the cylinder 51, and the hollow piston rod 53 is slidingly and sealingly connected to the cylinder 51. An air outlet is provided on the outer wall of the hollow piston rod 53 and near the position of the first piston 52. A fixing block is fixedly mounted on the top of the boss 12. One end of the hollow piston rod 53 outside the cylinder 51 is connected to the fixing block. The top of the connecting pipe 61 is fixedly connected to the hollow piston rod 53. When the through-type jack 1 is working, the tensioning piston 11 extends forward, driving the hollow piston rod 53 to move forward. The hollow piston rod 53 pulls the first piston 52 forward, which will press the cylinder 5 1 and the air in front of the first piston 52 is squeezed. Under the action of the pressure difference, the air will be discharged outward through the air outlet on the hollow piston rod 53, and then discharged into the annular groove 31 and the trigger 65 through the connecting pipe 61. If the annular groove 31 can be reliably closed by the thrust contact surface of the tool anchor (including complete closure and slight leakage), the air pressure in the trigger 65 will gradually increase, and its core components will operate, triggering the travel switch 66 to operate, and then the flashing light 67 will be lit. After the construction personnel observe that the flashing light 67 is lit, they can know that the flatness of the tool anchor thrust contact surface is good. On the contrary, if the flatness of the tool anchor thrust contact surface is poor, the annular groove 31 will leak quickly, and eventually the travel switch 66 cannot be triggered, the flashing light 67 will not be lit, and it is necessary to stop the machine to check or replace the tool anchor.

[0051] Specifically, the trigger 65 includes an outer tube 651, a second piston 652, a telescopic rod 653, a second spring 654, a fixed rod 655 and a contact head 656. The outer tube 651 is fixedly installed on the top of the fixed plate 63. The second piston 652 is slidingly sealed and installed in the outer tube 651. The telescopic rod 653 is arranged in the outer tube 651. The bottom end of the telescopic rod 653 is fixedly connected to the fixed plate 63, and the top end is fixedly connected to the bottom of the second piston 652. The second spring 654 is sleeved on the outside of the telescopic rod 653. The top end of the second spring 654 is fixedly connected to the second piston 652, and the bottom end is fixedly connected to the fixed plate 63. The fixed rod 655 is fixedly installed on the second piston 652. At the top, the contact head 656 is fixedly installed on the top of the fixed rod 655. When the annular groove 31 is reliably closed, the air pressure in the outer tube 651 will gradually increase. Under the action of the air pressure, the second piston 652 will gradually rise, driving the contact head 656 to move upward. After the contact head 656 rises to a certain height, it will conflict with the contact of the travel switch 66, thereby triggering the travel switch 66 to operate and close the normally open point of the travel switch 66. A pressure relief valve 657 is fixedly installed on the outer wall of the outer tube 651. When the second piston 652 rises to the extreme position, the air pressure in the outer tube 651 further increases and reaches the threshold of the pressure relief valve 657. The pressure relief valve 657 will automatically exhaust air to the outside.

[0052] In this embodiment, in order to provide protection for the flash prompt component 6, a door-shaped protective cover is fixedly installed on the top of the boss 12, and the flash prompt component is located in the door-shaped protective cover.

[0053] In this embodiment:

[0054] During the installation phase, the annular pressure sensor 2 is first installed into the anchor groove 111. During installation, the multiple first positioning slide blocks on the annular plate 21 enter the corresponding positioning slide grooves respectively, so that the signal line interface of the annular pressure sensor 2 is located in the avoidance groove 112, and then the annular pressure sensor 2 is pushed until the annular plate 21 fits the vertical inner wall of the anchor groove 111, and then the detection ring 3 is installed into the anchor groove 111 in the same way, and the detection ring 3 is pushed to fit the pressure surface of the annular pressure sensor 2, and then, the rotating handles 44 on the two limiting mechanisms 4 are respectively removed from the corresponding locking pieces 45. After the L-shaped lock 451 is unscrewed and the rotating handle 44 is loosened, the round plug rod 41 and the square plug rod 47 will move into the anchor groove 111 at the same time under the tension of the first spring 43, and finally the round plug rod 41 will be inserted into the round slot 211 on the annular plate 21, and the square plug rod 47 will enter the square slot 32 on the detection ring 3, restricting the annular pressure sensor 2 and the detection ring 3. Then, one end of the signal line is connected to the interface of the annular pressure sensor 2 through the installation port 113, and the other end of the signal line is connected to the matching digital display instrument. The bottom end of the connecting pipe 61 is connected to the air inlet connector on the detection ring 3;

[0055] After completing the above preparations, the cable is passed through the hollow position at the rear end of the through-type jack 1 and out from the front end of the anchor groove 111. Then, the tool anchor is inserted into the cable through the anchor hole. Subsequently, the tool anchor is pushed and pushed into the anchor groove 111 until the thrust contact surface of the tool anchor fits with the surface with the annular groove 31 on the detection ring 3. Then, the clip is rammed into the anchor hole using a tool.

[0056] Then, start the hydraulic station and control the through-type jack 1 to work, so that the tensioning piston 11 extends forward. Since the clip on the tool anchor has a blocking effect on the cable, it will drive the cable forward, so that the cable is gradually tensioned. The tensioning force on the cable acts in the opposite direction through the tool anchor and the detection ring 3 on the annular pressure sensor 2. The annular pressure sensor 2 transmits the detected pressure signal to the matching digital display instrument. Relevant construction personnel can obtain the current cable tension in real time through the value displayed on the digital display instrument, and compare and verify the pressure data on the digital display instrument with the pressure value displayed on the instrument on the hydraulic station. If the data of the two are consistent or the error is within the allowable range, it indicates that the test result is reliable; if the data difference is large, the equipment needs to be checked and debugged;

[0057] During the extension of the tensioning piston 11, the hollow piston rod 53 connected thereto moves synchronously, pulling the first piston 52 of the gas delivery assembly 5 forward. During the forward movement of the first piston 52, the air on the front side of the cylinder 51 is squeezed. Under the action of the pressure difference, the air passes through the air outlet on the hollow piston rod 53 and is discharged into the annular groove 31 of the detection ring 3 and the trigger 65 of the flash prompt assembly 6 through the connecting pipe 61. If the tool anchor thrust contact surface is well-flattened and can fit tightly with the detection ring 3 to reliably seal the annular groove 31, the air discharged into the annular groove 31 cannot leak out quickly, which will gradually increase the air pressure in the outer cylinder 651. Under the action of the air pressure, the second piston 652 in the trigger 65 overcomes the elastic force of the second spring 654 and gradually rises along the telescopic rod 653, driving The contact head 656 at the top of the fixed rod 655 moves upward synchronously. When the contact head 656 rises to contact with the contact of the travel switch 66, the travel switch 66 is triggered to operate, so that its normally open point is closed, and the power supply circuit of the originally disconnected flashing light 67 is connected, and the flashing light 67 is lit. The construction personnel can thus know that the flatness of the tool anchor thrust contact surface is good; if the flatness of the tool anchor thrust contact surface is poor and cannot fit tightly with the detection ring 3, the air discharged into the annular groove 31 will leak out quickly, resulting in the air pressure in the outer cylinder 651 cannot be effectively increased, and the second piston 652 cannot rise to the position of triggering the travel switch 66, and the flashing light 67 will not be lit. At this time, the construction personnel need to stop the machine to check or replace the tool anchor to ensure the accuracy of subsequent cable tension detection.

[0058] Second embodiment:

[0059] In a second embodiment of the present invention, a method for using a hydraulic tensioner for detecting cable tension is provided, comprising the following steps:

[0060] T1: Connect the signal line of the annular pressure sensor 2 to the matching digital display instrument;

[0061] T2: Pass the cable through the through-type jack 1, then insert the tool anchor into the cable and push it into the anchor groove 111. Then clamp the clip on the outside of the cable and tamp it into the anchor hole of the tool anchor, ensuring that the clip bites the cable evenly to prevent it from slipping;

[0062] T3: Start the through-type jack 1 through the hydraulic station to extend the tensioning piston 11 to tension the cable, and drive the cable to be tensioned to the designed initial stress;

[0063] T4: Control the through-type jack 1 to perform staged pressure-raising and tensioning. Hold the load for a certain period of time after each stage of tensioning. During the tensioning process, read the data displayed on the digital instrument and compare it with the data on the pressure gauge of the hydraulic station to ensure accurate detection of the tensioning force.

[0064] T5: After the designed tensioning force is reached and the load is stable, the tensioning piston 11 of the through-type jack 1 is returned, and then the tool anchor and the jack are removed.

[0065] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hydraulic tensioning instrument for detecting cable tension, comprising a through-type jack, a tensioning piston disposed within the through-type jack, and an anchor groove formed at one end of the tensioning piston, characterized in that: An annular pressure sensor is installed in the anchor groove, a boss is integrally formed on the top of the tensioning piston, an avoidance groove is provided on the inner wall of the anchor groove, a signal line interface of the annular pressure sensor is located in the avoidance groove, a mounting port connected to the avoidance groove is provided on the top of the boss, an annular plate is fixedly installed on the mounting surface of the annular pressure sensor, two circular slots are provided on the outer ring of the annular plate, and limiting mechanisms are provided on both sides of the tensioning piston, and the limiting mechanisms are used to cooperate with the circular slots to fix the annular plate; Any of the limiting mechanisms includes a circular insertion rod, a circular sleeve block, a first spring, a rotating hand lever and a locking piece, the circular insertion rod being slidably mounted on the outer wall of the tensioning piston, one end of the circular insertion rod extending into the corresponding circular slot, the circular sleeve block being fixedly sleeved on the outer wall of the circular insertion rod, the first spring being sleeved on the circular insertion rod, one end of the first spring being fixedly connected to the circular sleeve block, and the other end being fixedly connected to the tensioning piston, the rotating hand lever being rotatably mounted on one end of the circular insertion rod located outside the tensioning piston, the locking piece being fixedly mounted on the outer wall of the tensioning piston, and the locking piece being provided with an L-shaped lock opening; It also includes a tool anchor thrust contact surface detection mechanism for detecting the flatness of the tool anchor thrust contact surface. The tool anchor thrust contact surface detection mechanism includes a detection ring, an air supply assembly and a flash prompt assembly. The air supply assembly is installed on the outer shell of the through-type jack, and the flash prompt assembly is installed on the top of the boss. The detection ring is installed in the anchor groove, and the detection ring contacts the pressure surface of the annular pressure sensor. An annular groove is provided on the outer wall of the detection ring away from the annular pressure sensor. The top of the detection ring is provided with an air intake connector located in the avoidance groove, and the air intake connector is connected to the annular groove. The flash prompt assembly includes a trigger. The air supply assembly is used to supply air to the annular groove and the trigger when the wire is tensioned.

2. The hydraulic tensioner for detecting cable tension according to claim 1, characterized in that: A plurality of first positioning sliders are integrally formed on the outer ring of the annular plate, and a plurality of positioning slots are opened on the inner wall of the anchor groove. The plurality of first positioning sliders are all located in the corresponding positioning slots and are slidably connected to the inner walls of the corresponding positioning slots.

3. The hydraulic tensioner for detecting cable tension according to claim 1, characterized in that: Two C-shaped protective covers are fixedly mounted on the outer shell of the through-type jack, and the two limiting mechanisms are both located in the corresponding C-shaped protective covers.

4. The hydraulic tensioner for detecting cable tension according to claim 1, characterized in that: The limiting mechanism also includes a connecting bar and a square plug rod. The square plug rod is slidably mounted on the outer wall of the tensioning piston, and the connecting bar is fixedly mounted on the outer wall of the circular sleeve. The end of the connecting bar away from the circular sleeve is fixedly connected to the square plug rod. Two square slots are provided on the outer ring of the detection ring, and the ends of the two square plug rods close to each other extend into the corresponding square slots.

5. The hydraulic tensioner for detecting cable tension according to claim 1, characterized in that: The flash prompt assembly also includes a connecting tube, a bellows, a fixed plate, a vertical plate, a travel switch and a flashing light. The fixed plate is fixedly mounted on the top of the boss, the trigger is mounted on the top of the fixed plate, the bottom end of the connecting tube is fixedly connected to the air intake joint, one end of the bellows is fixedly connected to the connecting tube, and the other end is connected to the trigger, the vertical plate is fixedly mounted on the top of the fixed plate, the travel switch is fixedly mounted on the outer wall of the vertical plate on one side close to the trigger, the travel switch is located directly above the trigger, and the flashing light is fixedly mounted on the outer wall of the vertical plate on the side away from the trigger.

6. The hydraulic tensioner for detecting cable tension according to claim 5, characterized in that: The gas delivery assembly includes a cylinder, a first piston and a hollow piston rod. The cylinder is fixedly mounted on the outer shell of the through-type jack, the first piston is slidingly and sealingly mounted in the cylinder, the hollow piston rod is fixedly mounted on the first piston, the hollow piston rod is away from the outside of the cylinder, and the hollow piston rod is slidingly and sealingly connected to the cylinder. An air outlet is provided on the outer wall of the hollow piston rod near the first piston, a fixing block is fixedly mounted on the top of the boss, one end of the hollow piston rod located outside the cylinder is connected to the fixing block, and the top end of the connecting pipe is fixedly connected to the hollow piston rod.

7. The hydraulic tensioner for detecting cable tension according to claim 5, characterized in that: The trigger includes an outer tube, a second piston, a telescopic rod, a second spring, a fixed rod and a contact head. The outer tube is fixedly mounted on the top of the fixed plate, the second piston is slidingly and sealingly mounted in the outer tube, the telescopic rod is arranged in the outer tube, the bottom end of the telescopic rod is fixedly connected to the fixed plate, and the top end is fixedly connected to the bottom of the second piston, the second spring is sleeved on the outside of the telescopic rod, the top end of the second spring is fixedly connected to the second piston, and the bottom end is fixedly connected to the fixed plate, the fixed rod is fixedly mounted on the top of the second piston, the contact head is fixedly mounted on the top end of the fixed rod, and a pressure relief valve is fixedly mounted on the outer wall of the outer tube.

8. The hydraulic tensioner for detecting cable tension according to claim 1, characterized in that: A door-shaped protective cover is fixedly installed on the top of the boss, and the flash prompt component is located in the door-shaped protective cover.

9. A method for using the hydraulic tensioner for detecting cable tension according to any one of claims 1 to 8, characterized in that: The following steps are involved: T1: Connect the signal line of the annular pressure sensor to the matching digital display instrument; T2: Pass the cable through the through-type jack, then put the tool anchor into the cable and push it into the anchor groove. Then clamp the clip on the outside of the cable and tamp it into the anchor hole of the tool anchor. Make sure the clip bites the cable evenly to prevent it from slipping. T3: Start the through-type jack through the hydraulic station to extend the tensioning piston to tension the cable, and drive the cable to be tensioned to the designed initial stress; T4: Control the through-type jack to perform staged pressure-raising tensioning. Hold the load for a certain period of time after each stage of tensioning. During the tensioning process, read the data displayed on the digital instrument and compare it with the data on the pressure gauge of the hydraulic station to ensure accurate tensioning force detection. T5: After the designed tensioning force is reached and the load is stable, return the tensioning piston of the through-type jack, and then remove the tool anchor and jack.

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