A three-strand fiber rope eye ring insertion quality detection device

Abstract

This utility model belongs to the field of fiber rope testing technology. It discloses a three-strand fiber rope eyelet splicing quality testing device, including a base, a clamping mechanism, and a composite load loading assembly. Upon activation of the control unit, the device enters its working state: a stepper motor drives a reciprocating screw to rotate, causing the slider and upper positioning clamp to move upwards. After the rope loop to be tested is fitted into the positioning post, the stepper motor reverses its rotation, causing the positioning clamp to move downwards and engage with the positioning clamp at the bottom of the mounting base, clamping the rope loop through the clamping sleeve. Subsequently, the rope tail is passed through the detector's circular hole and clamped by the rope clamp. During the testing phase, an electric cylinder pushes a push plate towards the positioning post, applying axial tension to the rope loop. Simultaneously, a swing cylinder drives the rope clamp to rotate ±15°, applying radial lateral bending force. Under the combined load, the stress sensor inside the detector's circular hole collects the stress data of the three strands of rope in real time and transmits it to the control unit for processing, completing the rope loop splicing quality testing.

Description

Technical Field

[0001] This utility model belongs to the field of fiber rope testing technology, specifically a device for testing the quality of three-strand fiber rope eyelet insertion. Background Technology

[0002] Three-strand fiber rope eyelets, due to their stable interlocking structure and load-bearing capacity, are widely used in logistics lifting, marine mooring, and outdoor operations, serving as a key component for ensuring the safety of operations such as lifting heavy objects and securing equipment. To prevent rope eyelets from breaking under stress due to substandard interlocking quality (such as loose strands or improper fit), thus causing safety accidents, quality testing devices for three-strand fiber rope eyelets are used. These devices primarily test the overall load-bearing strength and stability of the interlocking parts by applying load to the rope eyelet, thereby determining whether the rope eyelet meets the usage requirements and providing a fundamental guarantee for subsequent safe use.

[0003] Existing three-strand fiber rope eyelet testing devices still have shortcomings in practical applications: First, the positioning and clamping of the rope eyelets mostly rely on manual adjustment. The rope eyelets need to be manually fitted onto the positioning structure and fixed, which is a cumbersome process. Moreover, it is difficult to control the manual clamping force, which can easily lead to positioning deviations or damage to the rope surface, affecting the testing efficiency and accuracy. Second, the load application method is relatively simple. Most devices can only apply axial tension to the rope eyelets, which cannot simulate the combined stress conditions of "axial tension + radial bending force" that rope eyelets often face in actual use. This results in deviations between the test results and the actual use scenario, making it difficult to comprehensively assess the actual load-bearing capacity of the rope eyelets. Third, the testing focus is mostly on the overall fracture strength of the rope eyelets, lacking monitoring of the stress state of individual strands of the three-strand rope at the joint. This makes it impossible to detect hidden defects such as "the whole is not broken but individual strands are loose" in a timely manner, posing a safety hazard. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a three-strand fiber rope eyelet insertion quality detection device to solve the problems of difficult rope eyelet detection and positioning and single load.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a three-strand fiber rope eyelet insertion quality detection device, characterized in that it includes a base, a clamping mechanism, and a composite load loading assembly. The base is generally configured as a rectangular plate. The clamping mechanism and the composite load loading assembly are both fixed on the top surface of the base. The clamping mechanism is installed on the far left side of the base, and the composite load loading assembly is installed on the far right side of the base. A positioning post is fixed at the center of the left side of the base. The clamping mechanism is sleeved on the positioning post. The output end of the composite load loading assembly faces the positioning post directly to the left side of the base. Optionally, the clamping mechanism consists of a mounting base, a guide rod, a reciprocating lead screw, a reciprocating nut, and a positioning clamp. The mounting base is U-shaped and horizontally mounted on the base. The reciprocating lead screw is vertically rotatably mounted in the mounting base, with its axis parallel to the axis of the positioning column. A helical groove is stamped on the surface of the reciprocating lead screw. The guide rod is symmetrically arranged in the mounting base on the side of the reciprocating lead screw, and its height is higher than that of the positioning column. The reciprocating nut engages with the helical groove on the reciprocating lead screw via a slider. A stepper motor is mounted on the top of the mounting base, passing through the mounting base and connecting to the reciprocating lead screw. The positioning clamp is circular in shape, and there are two clamps. One clamp is fixed on the slider and moves up and down with the slider, while the other clamp is fixed to the bottom of the mounting base.

[0006] Optionally, the composite load loading assembly consists of an electric cylinder, a push plate, a swing cylinder, and a rope clamp. The electric cylinder is installed on the far right of the base, with its output shaft facing the positioning column. A push plate is installed at the top of the electric cylinder's output shaft. The swing cylinder is horizontally mounted on the push plate. The rope clamp is fixed on the rotating output shaft of the swing cylinder and rotates with the swing cylinder. The rope clamp faces the positioning clamp and rotates at an angle of ±15°.

[0007] Optionally, a detector is installed on the right side of the positioning column and on the top surface of the base. The detector has a circular hole for accommodating the rope, and stress sensors are evenly distributed on the inner wall of the circular hole.

[0008] Optionally, a wear-resistant pad that abuts against the positioning post is fixed on the inner side wall of the positioning clamp, and a clamping sleeve is installed on the opposite side of the two positioning clamps. The clamping sleeve is the same size as the rope being tested, and a notch is left on the right side of the clamping sleeve, which faces the detector and the rope holder.

[0009] Optionally, a control unit is fixed on the right side of the base, and the control unit is electrically connected to the stress sensor, electric cylinder, swing cylinder and stepper motor.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes a clamping mechanism to achieve automated and precise positioning of the rope loop, eliminating the need for manual adjustment and effectively improving detection efficiency and positioning accuracy. In the clamping mechanism, a stepper motor within the U-shaped mounting base drives a reciprocating lead screw to rotate, causing the slider and positioning clamp connected to the reciprocating nut to move up and down. Combined with the positioning clamp fixed at the bottom of the mounting base, this automatically clamps and secures the rope loop. The wear-resistant pad on the inner wall of the positioning clamp prevents wear caused by prolonged contact between the positioning pin and the clamp body, extending the component's lifespan. The clamping sleeve, matching the size of the rope being tested, fits tightly against the rope. Simultaneously, the pre-reserved notch on its right side aligns with the detector and rope clamp, ensuring a smooth subsequent rope threading path. This prevents the rope from being damaged by clamping, guarantees positioning accuracy, and reduces human error. The composite load loading component in this invention can simulate the composite stress conditions of rope loops in actual use, making the test results more consistent with real-world usage scenarios and improving the reliability of quality assessment. The electric cylinder output shaft is positioned towards the positioning post, applying a stable axial tensile force to the rope loop. Meanwhile, the horizontally mounted swing cylinder on the push plate can drive the rope clamp to rotate ±15°, thereby applying a radial bending force to the rope loop. The combined effect of these two loads can reproduce the stress state of the rope loop in scenarios such as hoisting and mooring. Compared to single axial tensile force testing, it can more comprehensively evaluate the stability of the rope loop's insertion point under composite stress. The combination of the detector and stress sensors in this invention enables simultaneous monitoring of the stress state of each strand of the three-strand rope, effectively identifying hidden defects at the joint. The stress sensors are evenly distributed on the inner wall of the detector's circular hole. When the rope loop joint passes through the hole, the sensors directly contact the three strands and simultaneously collect stress data for each strand. Compared to methods that only detect overall strength, this approach can promptly detect hidden problems such as loose individual strands or incomplete fitting, which are difficult to detect with overall inspection, further improving the comprehensiveness and accuracy of the detection. Attached Figure Description

[0011] Figure 1 This is a front view of the overall structure of this utility model; Figure 2 This is a rear view schematic diagram of the overall structure of this utility model; Figure 3 This is a front view schematic diagram of the overall structure of the clamping mechanism in this utility model; In the picture: 1. Base; 2. Positioning pin; 3. Mounting base; 4. Guide rod; 5. Reciprocating lead screw; 6. Reciprocating nut; 7. Positioning clamp; 8. Slider; 9. Stepper motor; 10. Electric cylinder; 11. Push plate; 12. Swing cylinder; 13. Rope holder; 14. Detector; 15. Stress sensor; 16. Wear-resistant pad; 17. Clamping sleeve; 18. Control unit. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] like Figures 1 to 3As shown, this utility model provides a three-strand fiber rope eyelet insertion quality detection device, characterized in that it includes a base 1, a clamping mechanism, and a composite load loading assembly. The base 1 is generally configured as a rectangular plate. The clamping mechanism and the composite load loading assembly are both fixed on the top surface of the base 1. The clamping mechanism is installed on the leftmost side of the base 1, and the composite load loading assembly is installed on the rightmost side of the base 1. A positioning post 2 is fixed at the center of the left side of the base 1. The clamping mechanism is sleeved on the positioning post 2. The output end of the composite load loading assembly faces the positioning post 2 directly to the left side of the base 1. The clamping mechanism consists of a mounting base 3, a guide rod 4, a reciprocating lead screw 5, a reciprocating nut 6, and a positioning clamp 7. The mounting base 3 is U-shaped and is horizontally mounted on the base 1. The reciprocating lead screw 5 is vertically rotatably mounted in the mounting base 3, with its axis parallel to the axis of the positioning post 2. A spiral groove is stamped on the surface of the reciprocating lead screw 5. The guide rod 4 is symmetrically arranged in the mounting base 3 on the side of the reciprocating lead screw 5, and its height is higher than that of the positioning post 2. The reciprocating nut 6 engages with the spiral groove on the reciprocating lead screw 5 through a slider 8. A stepper motor 9 is mounted on the top of the mounting base 3, and the stepper motor 9 passes through the mounting base 3 and is connected to the reciprocating lead screw 5. The positioning clamp 7 is circular in shape, and there are two of them. One is fixed on the slider 8 and moves up and down with the slider 8, while the other is fixed to the bottom of the mounting base 3.

[0014] Specifically, this device achieves automated and precise positioning of the rope loop through a clamping mechanism, eliminating the need for manual adjustment and effectively improving detection efficiency and positioning accuracy. In the clamping mechanism, a stepper motor 9 within the U-shaped mounting base 3 drives the reciprocating lead screw 5 to rotate, causing the slider 8 connected to the reciprocating nut 6 and the positioning clamp 7 to move up and down. Combined with the positioning clamp 7 fixed at the bottom of the mounting base 3, the rope loop can be automatically clamped and fixed. The composite load loading assembly consists of an electric cylinder 10, a push plate 11, a swing cylinder 12, and a rope clamp 13. The electric cylinder 10 is installed on the far right of the base 1, with its output shaft facing the positioning post 2. The push plate 11 is mounted on the top of the output shaft of the electric cylinder 10. The swing cylinder 12 is horizontally mounted on the push plate 11. The rope clamp 13 is fixed to the rotating output shaft of the swing cylinder 12 and rotates with it. The rope clamp 13 faces the positioning clamp 7 and rotates at an angle of ±15°.

[0015] Specifically, the composite load loading component can simulate the composite stress conditions of rope loops in actual use, making the test results more consistent with real-world usage scenarios and improving the reliability of quality assessment. The output shaft of the electric cylinder 10 is oriented towards the positioning post 2, which can apply a stable axial tensile force to the rope loop. Meanwhile, the swing cylinder 12, which is mounted laterally on the push plate 11, can drive the rope clamp 13 to rotate ±15°, thereby applying a radial lateral bending force to the rope loop. The two loads work together to reproduce the stress state of the rope loop in scenarios such as hoisting and mooring. Compared with single axial tensile force testing, it can more comprehensively evaluate the stability of the rope loop insertion part under composite stress.

[0016] A detector 14 is installed on the right side of the positioning column 2 and on the top surface of the base 1. The detector 14 has a circular hole for accommodating the rope, and stress sensors 15 are evenly distributed on the inner wall of the circular hole.

[0017] Specifically, the combination of detector 14 and stress sensor 15 enables synchronous monitoring of the stress state of each strand of the three-strand rope, effectively identifying hidden defects at the joint. The stress sensors 15 are evenly distributed on the inner wall of the circular hole of detector 14. When the rope loop joint passes through the circular hole, the sensors can directly contact the three strands and simultaneously collect stress data for each strand. Compared to methods that only detect overall strength, this approach can promptly detect hidden problems that are difficult to detect with overall inspection, such as loosening of individual strands or improper fitting, further improving the comprehensiveness and accuracy of the inspection.

[0018] The inner wall of the positioning clamp 7 is fixed with a wear-resistant pad 16 that abuts against the positioning post 2. The two positioning clamps 7 are equipped with clamping sleeves 17 on opposite sides. The clamping sleeves 17 are the same size as the rope being tested, and there is a notch on the right side of the clamping sleeves 17, which faces the detector 14 and the rope clamp 13.

[0019] Specifically, the wear-resistant pad 16 on the inner wall of the positioning clamp 7 can prevent wear caused by long-term contact between the positioning post 2 and the clamp body, thus extending the service life of the components. The clamping sleeve 17, which is the same size as the rope being tested, can fit tightly against the rope body. At the same time, the notch reserved on its right side is directly opposite the detector 14 and the rope clamp 13, ensuring a smooth subsequent path for the rope to be threaded through. This not only prevents the rope from being pinched but also ensures positioning accuracy and reduces human error.

[0020] A control unit 18 is fixed on the right side of the base 1. The control unit 18 is electrically connected to the stress sensor 15, the electric cylinder 10, the swing cylinder 12 and the stepper motor 9.

[0021] Specifically, the electrical connection between the control unit 18 and each functional component enables automated control of the testing process, reducing manual intervention and ensuring stable testing and reliable data. The control unit 18 can receive stress data collected by the stress sensor 15 in real time, and simultaneously adjust the operating parameters of the stepper motor 9, electric cylinder 10, and swing cylinder 12 to automatically complete processes such as positioning and clamping, load application, data acquisition and processing. This not only reduces the labor intensity of manual operation but also avoids parameter fluctuations caused by manual operation, ensuring consistency and data accuracy in each test.

[0022] The working principle and usage process of this utility model are as follows: The control unit 18 is activated, and the device enters the working state: The stepper motor 9 drives the reciprocating screw 5 to rotate, causing the slider 8 and the upper positioning clamp 7 to move upward. After the rope loop to be tested is fitted into the positioning post 2, the stepper motor 9 rotates in the reverse direction to move the positioning clamp 7 downward, cooperating with the positioning clamp 7 at the bottom of the mounting base 3, and clamping the rope loop through the clamping sleeve 17; then the rope tail is passed through the circular hole of the detector 14 and clamped by the rope clamp 13; during the detection stage, the electric cylinder 10 pushes the push plate 11 to move towards the positioning post 2, applying axial tension to the rope loop, while the swing cylinder 12 drives the rope clamp 13 to rotate ±15°, applying radial lateral bending force; under the combined load, the stress sensor 15 in the circular hole of the detector 14 collects the stress data of the three strands of rope in real time and transmits it to the control unit 18 for processing, completing the rope loop insertion quality detection.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the quality of three-strand fiber rope eyelet insertion, characterized in that, The system includes a base (1), a clamping mechanism, and a composite load loading assembly. The base (1) is generally rectangular. The clamping mechanism and the composite load loading assembly are both fixed on the top surface of the base (1). The clamping mechanism is installed on the leftmost side of the base (1), and the composite load loading assembly is installed on the rightmost side of the base (1). A positioning post (2) is fixed at the center of the left side of the base (1). The clamping mechanism is sleeved on the positioning post (2). The output end of the composite load loading assembly faces the positioning post (2) to the left side of the base (1).

2. The device for detecting the quality of three-strand fiber rope eyelet insertion according to claim 1, characterized in that, The clamping mechanism consists of a mounting base (3), a guide rod (4), a reciprocating screw (5), a reciprocating nut (6), and a positioning clamp (7). The mounting base (3) is U-shaped and is horizontally mounted on the base (1). The reciprocating screw (5) is vertically rotatably mounted in the mounting base (3). The axis of the reciprocating screw (5) is parallel to the axis of the positioning column (2), and a spiral groove is stamped on the surface of the reciprocating screw (5). The guide rod (4) is symmetrically arranged in the mounting base (3) and the reciprocating screw (5) The guide rod (4) is higher than the positioning column (2) on the side. The reciprocating nut (6) is engaged with the spiral groove on the reciprocating screw (5) through the slider (8). A stepper motor (9) is installed at the top of the mounting base (3). The stepper motor (9) passes through the mounting base (3) and is connected to the reciprocating screw (5). The positioning clamp (7) is set as a ring and there are two of them. One of them is fixed on the slider (8) and moves up and down with the slider (8). The other is fixed at the bottom of the mounting base (3).

3. The device for detecting the quality of three-strand fiber rope eyelet insertion according to claim 1, characterized in that, The composite load loading assembly consists of an electric cylinder (10), a push plate (11), a swing cylinder (12), and a rope clamp (13). The electric cylinder (10) is installed on the rightmost side of the base (1), and the output shaft of the electric cylinder (10) faces the positioning column (2). The push plate (11) is installed at the top of the output shaft of the electric cylinder (10). The swing cylinder (12) is installed horizontally on the push plate (11). The rope clamp (13) is fixed on the rotating output shaft of the swing cylinder (12) and rotates with the swing cylinder (12). The direction of the rope clamp (13) is directly opposite the positioning clamp (7) and the rotation angle is ±15°.

4. The device for detecting the quality of three-strand fiber rope eyelet insertion according to claim 1, characterized in that, A detector (14) is installed on the right side of the positioning column (2) and on the top surface of the base (1). The detector (14) has a circular hole for accommodating the rope, and stress sensors (15) are evenly distributed on the inner wall of the circular hole.

5. The device for detecting the quality of three-strand fiber rope eyelet insertion according to claim 2, characterized in that, The inner wall of the positioning clamp (7) is fixed with a wear-resistant pad (16) that abuts against the positioning post (2). The two positioning clamps (7) are equipped with clamping sleeves (17) on opposite sides. The clamping sleeves (17) are the same size as the rope being tested, and there is a notch on the right side of the clamping sleeves (17). The notch is directly opposite the detector (14) and the rope clamp (13).

6. The device for detecting the quality of three-strand fiber rope eyelet insertion according to claim 1, characterized in that, A control unit (18) is fixed on the right side of the base (1). The control unit (18) is electrically connected to the stress sensor (15), the electric cylinder (10), the swing cylinder (12), and the stepper motor (9).

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