Tension verification device based on bollard surface strain cable tension measurement system

Abstract

A tension verification device based on a bollard surface strain cable tension measurement system comprises a support, a hand winch and a dynamometer. The cable tension measuring system comprises a bollard fixed on a foundation, a plurality of strain gauges attached to the side wall of the bollard, and a strain signal collector electrically connected with the strain gauges. The support is fixed on a foundation, the hand winch is fixedly mounted on the support, a steel wire rope is wound on a reel of the hand winch, the steel wire rope extends out of the reel, passes through a guide wheel fixedly mounted on the support and then is connected with one end of the dynamometer, the other end of the dynamometer is connected with a mooring rope sleeved on the bollard, and the hand winch tensions the steel wire rope and the mooring rope. According to the embodiment of the utility model, the hand winch is utilized to tension the cable through the steel wire rope and provide tension for the cable, and the provided tension can be measured by the tension meter, so that the tension measured by the tension meter is directly compared with the tension measured by the bollard through the strain gauge, and the verification of the indirect measurement accuracy of the bollard strain gauge is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of ship engineering, and in particular relates to a tension verification device based on a bollard surface strain cable tension measurement system. Background Art

[0002] Measuring cable loads during mooring is crucial for the safety of both ships and docks. Cable load measurement is a key technology that provides valuable data for studying the stress state of ship cables and the configuration of dock bollards, playing a vital role in port safety operations. In recent years, the proliferation of large, open docks in coastal ports has led to the increasing difficulty of traditional measurement methods due to the poor shelter and harsh wind, wave, and current conditions in the waters where these docks are located. This has resulted in significant cable loads when mooring ships.

[0003] Existing methods for directly measuring cable loads typically involve installing sensors on the cables to directly measure the force acting on them. However, this direct measurement method presents several significant challenges. First, in practice, sensors attached to cables can easily interfere with normal berthing and unberthing operations, increasing operational complexity. Second, because cables bear heavy loads, sensors are susceptible to damage and may even fail due to excessive load, creating safety risks. Furthermore, the installation and removal of sensors can impact production efficiency, increasing operational time and costs.

[0004] To overcome the shortcomings of direct measurement methods, an indirect measurement method based on bollard surface strain has been proposed. This method uses a strain gauge attached to the bollard surface to indirectly measure the cable tension by exploiting the deformation of the bollard caused by the cable pull. The strain gauge deforms with the bollard, causing the resistance wire to change accordingly. This change in resistance allows strain to be calculated, ultimately converting it into cable tension. This indirect measurement method based on bollard strain minimizes disruption to normal vessel operations and reduces the risk of sensor damage.

[0005] However, this indirect measurement method also has its shortcomings. Because tension is calculated from strain, there is currently a lack of effective means to verify the exact relationship between strain and actual cable load. This can lead to large errors in the measurement results, affecting the reliability and accuracy of the measurement. Utility Model Content

[0006] In response to the deficiencies in the relevant technologies, the utility model provides a tension verification device based on a cable tension measurement system of a cable pile surface strain, so as to solve the problem that the current cable tension measurement system based on a cable pile surface strain cannot perform tension measurement verification.

[0007] The utility model provides a tension verification device based on a cable tension measurement system of a bollard surface strain, which is used in a cable tension measurement system and comprises a bracket, a hand winch and a dynamometer;

[0008] The cable tension measurement system includes a cable pile fixed on the foundation, a plurality of strain gauges attached to the side wall of the cable pile, and a strain signal collector electrically connected to the strain gauges;

[0009] The bracket is fixed on the foundation, and the hand winch is fixedly installed on the bracket. A wire rope is wound on the winch wheel of the hand winch. After the wire rope extends out of the winch wheel, it passes through the guide wheel fixedly installed on the bracket and is connected to one end of the dynamometer. The other end of the dynamometer is connected to the cable set on the cable pile, and the hand winch tightens the wire rope and the cable.

[0010] In some embodiments, the hand winch is fixedly mounted on the top of the bracket, and a plurality of guide wheels are mounted from bottom to top on a side of the bracket facing the bollard.

[0011] In some embodiments, the support comprises a base plate, vertical beams, and diagonal bracing beams;

[0012] The bottom plate is fixed on the foundation, the vertical beam is vertically fixed on the bottom plate, and a first side wall and a second side wall are respectively provided on both sides of the vertical beam, the first side wall faces the cable pile, and the guide wheels are all installed on the first side wall;

[0013] The diagonal bracing beam is arranged obliquely, and two ends thereof are respectively fixedly connected to the top end of the second side wall and the bottom plate.

[0014] In some embodiments, the bracket further includes a mounting seat, which is fixedly mounted on the top end of the diagonal support beam so as to be located on a side of the vertical beam away from the cable pile, and the hand winch is mounted on the mounting seat.

[0015] In some embodiments, a tilted inclined plate is provided at the top of the vertical beam, and a tensioning wheel is installed on the inclined plate. After the wire rope extends from the lower side of the winch, it first passes through the upper side of the tensioning wheel and then passes downward through the lower side of a corresponding guide wheel.

[0016] In some embodiments, the vertical beams and the diagonal bracing beams are both square tubes, and the diagonal plates close the ports at the top ends of the vertical beams.

[0017] In some embodiments, a mounting plate is further included, which is attached to the foundation and fixedly connected thereto, and the cable pile and the bracket are fixedly mounted on the mounting plate.

[0018] In some embodiments, a duckbill is installed on the top of the bollard. The duckbill is located on a side away from the bracket, and the duckbill prevents the cable from escaping upward from the bollard.

[0019] Compared with the prior art, the beneficial effect of the present application is that: in the embodiment of the utility model, a hand winch is used to tighten the cable through the wire rope to provide tension for the cable, and the provided tension can be measured by a dynamometer, thereby realizing a direct comparison between the tension measured by the dynamometer and the tension measured by the cable pile through the strain gauge, realizing the verification of the indirect measurement accuracy of the cable pile strain gauge, and being able to quickly obtain the error between the direct measurement and the indirect measurement, thereby correcting the error of the indirect measurement, improving the accuracy of the indirect measurement, and solving the problem that the current cable tension measurement system based on the cable pile surface strain cannot perform tension measurement verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the tension verification device based on the cable tension measurement system of the cable pile surface strain of the utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of the tension verification device based on the cable tension measurement system of the cable pile surface strain of the utility model. Figure 2 .

[0023] In the picture:

[0024] 1. Bracket; 11. Bottom plate; 12. Vertical beam; 13. Diagonal bracing beam; 14. Mounting base; 15. Diagonal plate;

[0025] 2. Hand winch; 21. Capstan; 22. Wire rope;

[0026] 3. Dynamometer; 4. Bollard; 41. Duckbill plate; 5. Strain gauge; 6. Cable to be tested; 7. Guide pulley; 8. Tensioning pulley; 9. Mounting plate. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] The terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of such features.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0031] like Figures 1 to 2 As shown, in an illustrative embodiment of a tension verification device of a cable tension measurement system based on a surface strain of a bollard 4 according to the present invention, the tension verification device includes a bracket 1 , a hand winch 2 and a dynamometer 3 .

[0032] The cable tension measurement system includes a cable pile 4 fixed on the foundation, a plurality of strain gauges 5 attached to the side walls of the cable pile 4, and a strain signal collector (not shown in the drawings) electrically connected to the strain gauges 5.

[0033] The bracket 1 is fixed on the foundation, the hand winch 2 is fixedly installed on the bracket 1, and a steel wire rope 22 is wound around the winch wheel 21 of the hand winch 2.

[0034] The cable 6 to be tested is placed on the bollard 4 and one end of the cable is connected to one end of the dynamometer 3. The wire rope 22 is pulled out from the winch 21 of the hand winch 2, passed around the guide wheel 7 installed on the bracket 1, and connected to the other end of the dynamometer 3.

[0035] Manually crank the handle of hand winch 2 to reel in wire rope 22, thereby pulling the cable 6 under test through wire rope 22 and dynamometer 3, tightening and straightening cable 6 until the reading on dynamometer 3 reaches the set tension value. The handle of hand winch 2 is then locked. At this point, wire rope 22 applies tension to cable 6 through dynamometer 3, and this applied tension is directly measured and read by dynamometer 3 as the set tension value. Simultaneously, the tension exerted on cable 6 acts on bollard 4, causing deformation of strain gauge 5 on bollard 4. Using the information collected by the strain signal collector, the tension of cable 6 under test is indirectly measured using an indirect measurement method based on the bollard surface strain.

[0036] Comparing the tension obtained by the indirect measurement method with the set tension value verifies the accuracy of the indirect measurement method based on the bollard surface strain, and the indirect measurement result can be corrected based on the error between the two. Measuring cable tension by deforming the strain gauge 5 on the bollard 4 (i.e., the indirect measurement method based on the bollard surface strain) is prior art and is not the subject of this invention.

[0037] In the embodiment of the present invention, a hand winch is used to tighten the cable through the wire rope 22 to provide tension for the cable, and the provided tension can be measured by the dynamometer, thereby achieving a direct comparison between the tension measured by the dynamometer and the tension measured by the cable pile 4 through the strain gauge 5, thereby achieving verification of the accuracy of the indirect measurement of the strain gauge 5 of the cable pile 4, and quickly obtaining the error between the direct measurement and the indirect measurement, thereby correcting the error of the indirect measurement and improving the accuracy of the indirect measurement, thereby solving the problem that the current cable tension measurement system based on the cable pile surface strain cannot perform tension measurement verification.

[0038] When the ship is moored, the cable is connected to the pile 4 from a high place downwards, and there is an inclination angle between the cable and the horizontal plane. In order to cope with the different inclination angles of the cable, the current cable tension measurement system based on the surface strain of the pile has also set a corresponding measurement method.

[0039] In some embodiments, the hand winch 2 is fixedly mounted on the top of the hand winch, and a plurality of guide wheels 7 are mounted from bottom to top on the side of the bracket 1 facing the bollard 4 .

[0040] After being pulled out of the winch 21, the wire rope 22 passes through guide wheels 7 at different heights and is then connected to the cable 6 to be tested via the dynamometer 3. This allows the cable 6 to be straightened to the desired angle of inclination when tightened. By changing the guide wheel 7 that the wire rope 22 passes through, the cable's inclination angle can be changed, allowing tension to be applied at different angles. This allows verification and error correction of tension measurements at different angles based on the surface strain of the bollard 4 cable tension measurement system, thus enhancing the functionality of the tension verification device.

[0041] When the wire rope 22 applies tension to the cable 6 to be tested through the dynamometer 3, the reaction force will also act on the bracket 1 through the hand winch. Since the hand winch is located at the top of the bracket 1 and the bottom end of the bracket 1 is fixed on the foundation, the reaction force arm acting on the bracket 1 is longer, which can easily cause the bracket 1 to bend and deform.

[0042] In some embodiments, the support frame 1 includes a base plate 11, vertical beams 12, and diagonal bracing beams 13. The base plate 11 is fixed to the foundation, and the vertical beams are vertically fixed to the base plate 11. A first side wall 11A and a second side wall 11B are provided on either side of the vertical beam. The first side wall 11A faces the bollard 4, and the guide wheels 7 are mounted on the first side wall 11A. The diagonal bracing beam 13 is arranged at an angle, with its ends fixedly connected to the top of the second side wall 11B and the base plate 11.

[0043] The diagonal bracing beam 13 supports the vertical beam 12 on the side away from the cable bollard 4, and together with the vertical beam 12 and the base plate 11, forms a stable triangular structure, which improves the stability of the bracket 1 and prevents deformation of the bracket 1 caused by reaction forces. In addition, the strong stability of the bracket 1 also allows the steel wire rope 22 to provide higher tension for the cable 6 to be tested, not only verifying the accuracy of the indirect measurement method, but also testing the cable tension limit.

[0044] When the hand winch is installed directly above the guide wheel 7, the wire rope 22, after being pulled out of the winch 21, extends vertically downward directly to the guide wheel 7, and then extends through the underside of the guide wheel 7 to the dynamometer 3. With each guide wheel 7 at a fixed height, the bracket 1 needs to be higher to position the hand winch 2 directly above the guide wheel 7 when it is installed at the top of the bracket 1. Furthermore, because the handle length of the hand winch is much longer than the radius of the winch 21, the hand winch 2 is installed at a higher top position, and the handle will reach a higher position when it swings, requiring the operator to stand on a higher platform when manually operating the handle.

[0045] In some embodiments, the bracket 1 further includes a mounting base 14, which is fixedly mounted on the top of the diagonal support beam 13, so that it is located on the side of the vertical beam 12 away from the bollard 4. The hand winch is mounted on the mounting base 14. In this case, the hand winch 2 is mounted on the side away from the bollard 4, which reduces its height. This eliminates the need for the bracket 1 to be at a high height, reduces the height of the highest position when the handle is swung, and eliminates the need for the operator to stand on a high platform to operate the hand winch, thereby improving the convenience of hand winch operation.

[0046] In some embodiments, a tilted inclined plate 15 is provided at the top of the vertical beam 12, and a tensioning wheel 8 is installed on the inclined plate 15. After the wire rope 22 extends from the lower side of the winch 21, it first passes through the upper side of the tensioning wheel 8 and then passes downward through the lower side of a corresponding guide wheel 7.

[0047] Because the hand winch 2 is far from the bollard 4, the wire rope 22 must pass over the top of the vertical beam 12 before extending downward to the guide pulley 7. The inclined plate 15 tilts the end surface of the top of the vertical beam 12, providing space for the wire rope 22 to extend toward the guide pulley 7. The tensioning pulley 8 lifts the wire rope 22, allowing it to be withdrawn from the winch 21 from the bottom. This lowers the overall center of gravity of the hand winch during operation, improving its stability. Furthermore, the wire rope 22 does not contact the vertical beam 12, preventing friction that could cause it to break.

[0048] In some embodiments, both the vertical beams 12 and the diagonal bracing beams 13 are square tubes, which are readily available and reduce manufacturing costs. The inclined plate 15 seals the top end of the vertical beam 12, allowing the inclined plate 15 to directly serve as the end face of the vertical beam 12. When the vertical beam 12 is square tube, the structural strength of the end portion is enhanced, and the reaction force transmitted to the inclined plate 15 by the tensioning pulley 8 is fully dispersed to all angles of the vertical beam 12, thereby improving the stability of the inclined plate 15 and the tensioning pulley 8.

[0049] In some embodiments, the tension verification device further includes a mounting plate 9. The mounting plate 9 is attached to the foundation and fixed thereto by bolts. Multiple bolts are provided along the length of the mounting plate 9 to ensure that the mounting plate 9 is securely fixed at all positions and fully abuts the foundation surface. The mounting seat 14 has a large area, which makes the connection between the entire verification device and the foundation more secure and prevents deformation of the mounting seat 14 due to the tensile force generated by the experiment.

[0050] The cable pile 4 and the bracket 1 are both fixedly mounted on the mounting plate 9, so that before the mounting plate 9 is fixedly connected to the foundation, the cable pile 4 and the bracket 1 can be positioned and fixed on the mounting plate 9 first, which is convenient for determining the relative position of the cable pile 4 and the bracket 1 and making it easy to level the foundation during installation.

[0051] In some embodiments, a duckbill plate 41 is installed on the top of the bollard 4 , and the duckbill plate 41 is located on a side away from the bracket 1 .

[0052] The duckbill plate 41 protrudes relative to the side wall of the cable pile 4, directly limiting the cable and preventing it from moving upward and escaping from the cable pile 4, so that the cable to be tested continues to bear the set tension.

[0053] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0054] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for which protection is requested in the present invention.

Claims

1. A tension verification device for a cable tension measurement system based on a bollard surface strain, used in a cable tension measurement system, characterized in that: Includes stand, hand winch and dynamometer; The cable tension measurement system includes a cable pile fixed on the foundation, a plurality of strain gauges attached to the side walls of the cable pile, and a strain signal collector electrically connected to the strain gauges; The bracket is fixed on the foundation, the hand winch is fixedly installed on the bracket, a steel wire rope is wound around the winch wheel of the hand winch, the steel wire rope extends out of the winch wheel, passes through the guide wheel fixedly installed on the bracket, and is connected to one end of the dynamometer, the other end of the dynamometer is connected to the cable sleeved on the cable pile, and the hand winch tightens the steel wire rope and the cable.

2. The tension verification device based on the bollard surface strain cable tension measurement system according to claim 1, characterized in that: The hand winch is fixedly mounted on the top end of the bracket, and a plurality of guide wheels are mounted from bottom to top on a side of the bracket facing the cable pile.

3. The tension verification device based on the bollard surface strain cable tension measurement system according to claim 2, characterized in that: The support comprises a base plate, vertical beams and diagonal bracing beams; The bottom plate is fixed on the foundation, the vertical beam is vertically fixed on the bottom plate, a first side wall and a second side wall are respectively provided on both sides of the vertical beam, the first side wall faces the cable bollard, and the guide wheels are all installed on the first side wall; The diagonal bracing beam is arranged obliquely, and its two ends are respectively fixedly connected to the top end of the second side wall and the bottom plate.

4. The tension verification device based on the bollard surface strain cable tension measurement system according to claim 3, characterized in that: The bracket further includes a mounting seat, which is fixedly mounted on the top end of the diagonal support beam so as to be located on a side of the vertical beam away from the cable pile, and the hand winch is mounted on the mounting seat.

5. The tension verification device based on the bollard surface strain cable tension measurement system according to claim 4, characterized in that: The top of the vertical beam is provided with an inclined plate, and a tensioning wheel is installed on the inclined plate. After the wire rope extends from the lower side of the winch, it first passes through the upper side of the tensioning wheel and then passes downward through the lower side of the corresponding guide wheel.

6. The tension verification device based on the bollard surface strain cable tension measurement system according to claim 5, characterized in that: The vertical beams and the diagonal support beams are both square tubes, and the diagonal plates close the ports at the top ends of the vertical beams.

7. The tension verification device based on the bollard surface strain cable tension measurement system according to any one of claims 1 to 6, characterized in that: It further comprises a mounting plate, which is attached to the foundation and fixedly connected thereto, and the cable pile and the bracket are both fixedly mounted on the mounting plate.

8. The tension verification device based on the bollard surface strain cable tension measurement system according to any one of claims 1 to 6, characterized in that: A duckbill plate is installed on the top of the cable pile. The duckbill plate is located on a side away from the bracket. The duckbill plate prevents the cable from escaping from the cable pile upwards.

Images