A tensile detection device for a ship's cable

Abstract

The application relates to the technical field of cable tension detection, and discloses a ship cable tension detection device, which comprises a detection box and further comprises two baffle plates slidingly connected above the detection box for protection during detection, a maintenance door installed on the front of the detection box, a partition plate fixedly connected to the middle of the inner wall of the detection box, a clamping mechanism arranged in the detection box and used for fixing the cable. The synchronous folding mechanism driven by the worm gear is used to realize preliminary clamping, and the readjusting assembly is arranged to generate relative displacement between the movable plate one and the movable plate two with the increase of the tension during the tension test, so that the wedge-shaped sliding block slides into the wedge-shaped groove slope, thereby driving the readjusting block to compress the cable in the radial direction, the self-adapting effect that the greater the tension, the tighter the clamping is realized, the technical problem that the cable slips out of the clamp under high load is solved, and the accuracy and reliability of the test data are ensured.

Description

Technical Field

[0001] This invention relates to the field of cable tensile strength testing technology, specifically to a tensile strength testing device for ship cables. Background Technology

[0002] As a core component in critical operations such as mooring, towing, and lifting, the tensile strength, elongation at break, and fatigue durability of ship cables directly affect the safety of ship berthing, operational efficiency, and even the safety of personnel and property. Therefore, it is crucial to conduct scientific and accurate tensile performance testing on cables during the manufacturing, warehousing, and periodic inspection stages.

[0003] Currently, tensile testing of cables mainly relies on universal testing machines or dedicated cable tensile testing machines. However, these existing technologies and equipment have the following prominent problems and limitations in practical applications, especially in simulating real ship operating conditions and ensuring the effectiveness of the tests: Common clamping methods include wedge clamps, hydraulic push clamps, or simple winding clamps. When subjected to extremely high tensile force, wedge clamps may lose their "wedge" effect due to hardening or deformation of the cable surface, causing the cable to slip out of the clamp as a whole. Although hydraulic push clamps can provide a large clamping force, they are prone to local stress concentration and premature failure for synthetic fiber cables with uneven diameters or soft surfaces. In addition, the friction coefficient between the clamping surface and the cable is unstable, resulting in poor repeatability of test results. Winding clamps are cumbersome to operate and may introduce additional bending stress, affecting the accuracy of pure tensile tests. Therefore, a tensile testing device for ship cables is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a tensile strength testing device for ship cables, which addresses the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a tensile strength testing device for ship cables, including a testing box, and further comprising: Two baffles are slidably connected to the top of the testing box for protection during testing; The inspection door is installed on the front of the inspection box; A partition plate is fixedly connected to the middle of the inner wall of the testing chamber, dividing the testing chamber into two cavities; The clamping mechanism, located inside the testing box, is used to secure the cable. The pulling mechanism, located inside the testing box and below the partition, is used to pull the cable for testing; The clamping mechanism includes: Multiple fixing rods are fixedly connected to both sides of the inner wall of the testing box; Two movable plates are slidably connected to the outer walls of the fixed rod on both sides; Two fixed components are respectively set on two movable plates for clamping the cable; Two re-tightening components are respectively installed on the fixing component for secondary tightening of the cable; The fixing component includes: The rotating drum is rotatably connected to the center of the movable plate. The circular ring is connected to one side of the rotating drum by multiple equidistant connecting rods; Multiple limiting sleeves are rotatably connected between the rotating cylinder and the ring, and are located between two adjacent connecting rods; Multiple clamping rods, one end of which is rotatably connected to the movable plate by a pin, and the other end of which movably passes through the limiting sleeve and extends to the axis of the rotating drum; Multiple locking cylinders, in pairs, are rotatably connected to the end of the clamping rod away from the pin, used to clamp the cable.

[0006] Preferably, the fixing component further includes: The worm gear is fixedly sleeved on the outer wall of the rotating drum and is used to drive the rotating drum to rotate. The worm gear is mounted on one side of the movable plate and meshes with the worm wheel to drive the worm wheel to rotate.

[0007] Preferably, the re-tightening assembly includes: Multiple tensioning blocks are arranged in a circumferentially equal distribution and movably connected to the rotating drum for tensioning the cable; Multiple sliding columns are fixedly connected to the tightening block and movably pass through the rotating drum; Multiple springs are respectively sleeved on the outer wall of each sliding column and located between the rotating cylinder and the re-tightening block, used to reset the re-tightening block outward; Multiple wedge-shaped sliders are fixedly connected to the outer wall of the tightening block and slide against one side of the movable plate to push the tightening block to move.

[0008] Preferably, the clamping mechanism further includes: Two movable plates are slidably connected to the outer wall of the fixed rod and located outside the movable plate one; Multiple springs are sleeved on the outer wall of the fixed rod and located between the movable plate and the inner wall of the detection box, for resetting the movable plate. Multiple springs are sleeved on the outer wall of the fixed rod and located between the movable plate 2 and the movable plate 1, for resetting the movable plate 1.

[0009] Preferably, a wedge-shaped groove is provided at the center of the second movable plate. After the wedge-shaped slider slides into the wedge-shaped groove, it pushes the wedge-shaped slider to move towards the center of the rotating cylinder.

[0010] Preferably, the pulling mechanism includes: Two bidirectional threaded rods are rotatably connected to the inner wall of the testing box via bearings, with one end movably penetrating the testing box and extending outwards; Two motors are mounted on the outer wall of the detection box and connected to the extension end of the bidirectional threaded rod to drive the bidirectional threaded rod to rotate. Multiple sliding holes and through holes are provided on both sides of the partition plate; Two push rods are respectively set in the through holes on both sides, and a slider is slidably connected in each sliding hole; A connecting slider connects the push rod and the slider; Multiple drive blocks are connected below the slider and threaded to the bidirectional threaded rod.

[0011] Preferably, a push-out mechanism is provided above the partition plate for lifting the cable, the push-out mechanism comprising: The ejector roller is positioned above the partition plate, and the base of the ejector roller is slidably connected to the partition plate via a movable rod, and extends downward through the partition plate. A tension spring is fitted onto the outer wall of the movable rod and connected between the ejector roller and the partition plate; Two cams are respectively fixedly sleeved on the outer walls of two bidirectional threaded rods; The push plate is fixedly connected to the bottom of the movable rod and fits against the outer wall of the cam.

[0012] Preferably, the connection of the cable is connected to a fixing sleeve for fixing the cable, and the inner wall of the detection box is rotatably connected to multiple rotating shafts through bearings, and the outer wall of the rotating shaft is fixedly fitted with a roller for guiding the cable.

[0013] The present invention, by adopting the above technical solution, can bring the following beneficial effects: 1. The tensile strength testing device for ship cables uses a worm gear driven synchronous gathering mechanism to achieve initial clamping. By setting up a re-tightening component during tensile testing, as the tensile force increases, the relative displacement between movable plate one and movable plate two forces the wedge-shaped slider into the inclined surface of the wedge groove, thereby driving the re-tightening block to radially press the cable. This achieves an adaptive effect where the greater the tensile force, the tighter the clamping, completely solving the technical problem of the cable slipping out of the clamp under high load and ensuring the accuracy and reliability of the test data.

[0014] 2. The tensile strength testing device for the ship's cable, through the sliding and closing baffle, forms a robust protective shield during testing, which can effectively prevent the huge elastic energy generated when the cable breaks and the possible flying parts, greatly ensuring the safety of operators and surrounding equipment.

[0015] 3. The tensile strength testing device for the ship's cable automatically resets under the action of spring one and spring two after the test is completed. The ejection mechanism is driven by a cam on a bidirectional threaded rod, which can further simulate the cable's stress and friction test, thereby further improving the simulation effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the front cross-sectional structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the present invention from a bottom view; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the pulling mechanism structure of the present invention; Figure 8 This is a schematic diagram of the clamping mechanism of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B.

[0017] In the diagram: 1. Testing box; 2. Baffle; 3. Inspection door; 4. Divider. 5. Clamping mechanism; 51. Fixed rod; 52. Movable plate one; 53. Fixing component; 531. Rotary drum; 532. Ring; 533. Connecting rod; 534. Limiting sleeve; 535. Clamping rod; 536. Pin; 537. Locking cylinder; 538. Worm gear; 539. Worm; 54. Re-tightening assembly; 541. Re-tightening block; 542. Sliding column; 543. Spring three; 544. Wedge slider; 55. Movable board two; 56. Spring one; 57. Spring two; 6. Cables; 7. Ejection mechanism; 71. Ejection roller; 72. Movable rod; 73. Tension spring; 74. Push plate; 75. Cam; 8. Pulling mechanism; 81. Double-ended threaded rod; 82. Motor; 83. Slider; 84. Push rod; 85. Connecting slider; 86. Drive block; 9. Fixing sleeve; 10. Rotating shaft; 11. Roller. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-9 One embodiment of the present invention is: a tensile strength testing device for ship cables, comprising a testing box 1, and further comprising: Two baffles 2 are slidably connected above the detection box 1 for protection during detection; Inspection door 3 is installed on the front of inspection box 1; The partition plate 4 is fixedly connected to the middle of the inner wall of the detection box 1, dividing the detection box 1 into two cavities; The clamping mechanism 5 is located inside the detection box 1 and is used to fix the cable 6. The pulling mechanism 8 is located inside the testing box 1 and below the partition plate 4, and is used to pull the cable 6 for testing; The clamping mechanism 5 includes: Multiple fixing rods 51 are fixedly connected to both sides of the inner wall of the detection box 1; Two movable plates 52 are slidably connected to the outer walls of the fixed rod 51 on both sides; Two fixing components 53 are respectively set on two movable plates 52 for clamping the cable 6; Two re-tightening components 54 are respectively installed on the fixing component 53 for secondary tightening of the cable 6; The fixing component 53 includes: Rotary drum 531 is rotatably connected to the center of movable plate 52; The circular ring 532 is connected to one side of the rotating drum 531 by multiple equidistant connecting rods 533; Multiple limiting sleeves 534 are rotatably connected between the rotating cylinder 531 and the ring 532, and are located between two adjacent connecting rods 533; Multiple clamping rods 535, one end of which is rotatably connected to the movable plate 52 via a pin 536, and the other end of which movably passes through the limiting sleeve 534 and extends to the axis of the rotating drum 531. Multiple locking cylinders 537, in pairs, are rotatably connected to the end of the clamping rod 535 away from the pin 536, for clamping the cable 6.

[0020] Fixing component 53 also includes: The worm gear 538 is fixedly sleeved on the outer wall of the rotating drum 531 and is used to drive the rotating drum 531 to rotate. The worm 539 is mounted on one side of the movable plate 52 and meshes with the worm wheel 538 to drive the worm wheel 538 to rotate.

[0021] The re-tightening assembly 54 includes: Multiple tensioning blocks 541 are arranged in a circumferentially equal distribution and movably connected to the rotating drum 531 for tensioning the cable 6; Multiple sliding columns 542 are fixedly connected to the tightening block 541 and movably pass through the rotating cylinder 531; Multiple springs 543 are respectively sleeved on the outer wall of each sliding column 542 and located between the rotating cylinder 531 and the re-tightening block 541, for resetting the re-tightening block 541 outward; Multiple wedge-shaped sliders 544 are fixedly connected to the outer wall of the tightening block 541 and slide against one side of the movable plate 52 to push the tightening block 541 to move.

[0022] The clamping mechanism 5 also includes: Two movable plates 55 are slidably connected to the outer wall of the fixed rod 51 and located outside the movable plate 52; Multiple springs 56 are sleeved on the outer wall of the fixed rod 51 and located between the movable plate 55 and the inner wall of the detection box 1, for resetting the movable plate 55. Multiple springs 57 are sleeved on the outer wall of the fixed rod 51 and located between the movable plate 55 and the movable plate 52, for resetting the movable plate 52.

[0023] A wedge-shaped groove is provided at the center of the movable plate 55. After the wedge-shaped slider 544 slides into the wedge groove, it pushes the wedge-shaped slider 544 to move towards the axis of the rotating cylinder 531.

[0024] The pulling mechanism 8 includes: Two bidirectional threaded rods 81 are rotatably connected to the inner wall of the test box 1 via bearings, and one end of each rod moves through the test box 1 and extends outward. Two motors 82 are installed on the outer wall of the detection box 1 and connected to the extension end of the bidirectional threaded rod 81 to drive the bidirectional threaded rod 81 to rotate. Multiple sliding holes and through holes are provided on both sides of the partition plate 4; Two push rods 84 are respectively set in the through holes on both sides, and a slider 83 is slidably connected in each sliding hole; A connecting slider 85 connects push rod 84 and slider 83; Multiple drive blocks 86 are respectively connected below the slider 83 and threadedly connected to the bidirectional threaded rod 81.

[0025] An ejection mechanism 7 is provided above the partition plate 4 to lift the cable 6. The ejection mechanism 7 includes: The ejector roller 71 is positioned above the partition plate 4, and the base of the ejector roller 71 is slidably connected to the partition plate 4 via the movable rod 72, and extends downward through the partition plate 4. A tension spring 73 is sleeved on the outer wall of the movable rod 72 and connected between the ejector roller 71 and the partition plate 4; Two cams 75 are respectively fixedly sleeved on the outer walls of two bidirectional threaded rods 81; The push plate 74 is fixedly connected to the bottom of the movable rod 72 and fits against the outer wall of the cam 75.

[0026] A fixing sleeve 9 is connected to the connection of the cable 6 to fix the cable 6. The inner wall of the detection box 1 is rotatably connected to multiple rotating shafts 10 through bearings, and the outer wall of the rotating shafts 10 is fixedly fitted with rollers 11 to guide the cable 6.

[0027] Working principle: First, open the inspection door 3, pass the cable 6 to be tested through the test box 1, so that its middle part is above the partition plate 4, and both ends pass through the clamping mechanisms 5 on both sides. The cable 6 can be guided by the roller 11 to reduce friction, and slide to close the two baffles 2 above to form a protective area to prevent the cable from breaking or the components from splashing during the test and causing danger. For each clamping mechanism 5, the operator drives the worm 539 to rotate, which in turn drives the worm wheel 538 to rotate, thereby driving the rotating drum 531 to rotate. At this time, the rotating drum 531 drives the ring 532 to rotate synchronously through the circumferentially distributed connecting rods 533. Since one end of the clamping rod 535 is hinged to the movable plate 52 and the other end passes through the limiting sleeve 534, when the rotating drum 531 rotates, the movement of the connecting rods 533 and the ring 532 forces all the clamping rods 535 to swing synchronously towards the center around their pivot point 536. Subsequently, the locking cylinders 537 at the ends of all the clamping rods 535 converge towards the center, thereby hugging and clamping the end of the cable 6 from all sides, completing the initial mechanical fixation. The worm wheel 538 and the worm 539 have self-locking properties, which can prevent them from reversing and loosening after being subjected to force. Then, a start-up test is performed. The motor 82 works synchronously, driving the two bidirectional threaded rods 81 to rotate and generate tension. The rotation of the bidirectional threaded rods 81 drives the drive block 86, which is threadedly engaged with them, to move along the bidirectional threaded rods 81. The drive block 86 moves through the slider 83, the connecting slider 85, and the push rod 84. The push rod 84 then pushes the cable 6 to move to both sides, thus pulling the cable 6.

[0028] When cable 6 is pulled, it causes movable plate 52 to move to both sides, compressing spring 57 located between it and movable plate 52. This causes cable 6 to move towards movable plate 55 and compress spring 56. Since clamping assembly 54 has gripped cable 6, and cable 6 itself is elastic, as the tension increases, cable 6 is pulled to both sides. At this time, the re-tightening assembly 54, fixedly connected to movable plate 52, begins to play a crucial role. When movable plate 52 shifts relative to movable plate 55, the wedge-shaped slider 544 fixed on the re-tightening block 541... The slider 544 will slide into the wedge-shaped groove in the center of the movable plate 55. The inclined surface of the wedge-shaped groove forces the wedge-shaped slider 544, along with the recoil block 541, to overcome the elastic force of the spring 543 and move radially inward toward the cable. The recoil block 541 presses the cable segment that has been initially clamped by the locking cylinder 537 from the side, achieving secondary clamping. As the tension increases, the relative displacement between the movable plates increases, the wedge-shaped slider 544 enters the wedge groove deeper, and the radial clamping force generated by the recoil block increases, thereby achieving an adaptive effect where the clamping force automatically increases with the test tension, effectively preventing slippage.

[0029] When the tension reaches the preset value or the cable breaks, the motor 82 stops or reverses. When the motor 82 reverses, the bidirectional threaded rod 81 drives the drive block 86 to move inward, and the thrust of all linkage mechanisms disappears. At this time, under the restoring force of spring 1 56 and spring 2 57, the movable plate 2 55 and movable plate 1 52 slide inward and reset in sequence. Furthermore, during the test, as the bidirectional threaded rod 81 rotates, the cam 75 fixed on it rotates accordingly. During the reset phase, the contour of the cam 75 pushes the push plate 74, causing the movable rod 72 to move upward, thereby lifting the ejector roller 71. The rising ejector roller 71 pushes the cable 6 upward, thus simulating the frictional force experienced by the cable 6 when it is being pulled, further improving the test results.

[0030] This invention provides a tensile strength testing device for ship cables. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A tensile strength testing device for ship cables, comprising a testing box (1), characterized in that, Also includes: Two baffles (2) are slidably connected above the detection box (1) for protection during detection; Inspection door (3) is installed on the front of the inspection box (1); The partition plate (4) is fixedly connected to the middle of the inner wall of the test box (1) to divide the test box (1) into two cavities; The clamping mechanism (5) is located inside the detection box (1) and is used to fix the cable (6). A pulling mechanism (8) is installed inside the detection box (1) and located below the partition plate (4) for pulling the cable (6) to perform the detection; The clamping mechanism (5) includes: Multiple fixing rods (51) are fixedly connected to both sides of the inner wall of the test box (1); Two movable plates (52) are slidably connected to the outer walls of the fixed rod (51) on both sides respectively; Two fixed components (53) are respectively set on two movable plates (52) for clamping the cable (6); Two re-tightening components (54) are respectively installed on the fixing component (53) for secondary tightening of the cable (6). The fixing component (53) includes: The rotating drum (531) is rotatably connected to the center of the movable plate (52); The circular ring (532) is connected to one side of the rotating drum (531) by multiple equidistant connecting rods (533); Multiple limiting sleeves (534) are rotatably connected between the rotating cylinder (531) and the ring (532), and are located between two adjacent connecting rods (533); Multiple clamping rods (535) are rotatably connected at one end to the movable plate (52) via a pin (536), and at the other end they movably pass through the limiting sleeve (534) and extend to the axis of the rotating drum (531). Multiple locking cylinders (537), in pairs, are rotatably connected to the end of the clamping rod (535) away from the pin (536) for clamping the cable (6).

2. The tensile strength testing device for ship cables according to claim 1, characterized in that: The fixing component (53) also includes: The worm gear (538) is fixedly sleeved on the outer wall of the rotating drum (531) and is used to drive the rotating drum (531) to rotate; The worm (539) is mounted on one side of the movable plate (52) and meshes with the worm wheel (538) to drive the worm wheel (538) to rotate.

3. The tensile strength testing device for ship cables according to claim 2, characterized in that: The re-tightening assembly (54) includes: Multiple tensioning blocks (541) are arranged in a circumferentially equal distribution and movably connected to the rotating drum (531) for tensioning the cable (6). Multiple sliding columns (542) are fixedly connected to the tightening block (541) and movably pass through the rotating cylinder (531). Multiple springs (543) are respectively sleeved on the outer wall of each sliding column (542) and located between the rotating cylinder (531) and the re-tightening block (541) for resetting the re-tightening block (541) outward. Multiple wedge-shaped sliders (544) are fixedly connected to the outer wall of the tightening block (541) and slide against one side of the movable plate (52) to push the tightening block (541) to move.

4. The tensile strength testing device for ship cables according to claim 3, characterized in that: The clamping mechanism (5) further includes: Two movable plates (55) are slidably connected to the outer wall of the fixed rod (51) and located outside the movable plate (52); Multiple springs (56) are sleeved on the outer wall of the fixed rod (51) and located between the movable plate (55) and the inner wall of the detection box (1) for resetting the movable plate (55). Multiple springs (57) are sleeved on the outer wall of the fixed rod (51) and located between the movable plate (55) and the movable plate (52) for resetting the movable plate (52).

5. The tensile strength testing device for ship cables according to claim 4, characterized in that: A wedge-shaped groove is provided at the center of the movable plate 2 (55). After the wedge-shaped slider (544) slides into the wedge-shaped groove, it pushes the wedge-shaped slider (544) to move towards the axis of the rotating cylinder (531).

6. The tensile strength testing device for ship cables according to claim 5, characterized in that: The pulling mechanism (8) includes: Two bidirectional threaded rods (81) are rotatably connected to the inner wall of the test box (1) through bearings, and one end of the rods extends outward through the test box (1). Two motors (82) are installed on the outer wall of the detection box (1) and connected to the extension end of the bidirectional threaded rod (81) to drive the bidirectional threaded rod (81) to rotate; Multiple sliding holes and through holes are provided on both sides of the partition plate (4); Two push rods (84) are respectively set in the through holes on both sides, and a slider (83) is slidably connected in each sliding hole. A connecting slider (85) connects the push rod (84) and the slider (83). Multiple drive blocks (86) are respectively connected below the slider (83) and threaded to the bidirectional threaded rod (81).

7. The tensile strength testing device for ship cables according to claim 6, characterized in that: A push-out mechanism (7) is provided above the partition plate (4) for lifting the cable (6). The push-out mechanism (7) includes: The ejector roller (71) is positioned above the partition plate (4), and the base of the ejector roller (71) is slidably connected to the partition plate (4) via the movable rod (72), and extends downward through the partition plate (4); A tension spring (73) is fitted on the outer wall of the movable rod (72) and connected between the ejector roller (71) and the partition plate (4); Two cams (75) are respectively fixedly sleeved on the outer wall of two bidirectional threaded rods (81); The push plate (74) is fixedly connected to the bottom of the movable rod (72) and fits against the outer wall of the cam (75).

8. The tensile strength testing device for ship cables according to claim 7, characterized in that: The cable (6) is connected to a fixing sleeve (9) for fixing the cable (6). The inner wall of the detection box (1) is rotatably connected to multiple rotating shafts (10) through bearings, and the outer wall of the rotating shaft (10) is fixedly fitted with a roller (11) for guiding the cable (6).

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