Bridge cable force on-line monitoring device

Abstract

The utility model discloses a bridge cable force on -line monitoring devices, including cable connection mechanism, cable force sensing mechanism and protection mechanism, the cable connection mechanism includes the cable one and cable two of symmetrical setting, and the both realizes detachable connection through cable force connecting component, the cable force sensing mechanism includes the cable boss of fixed connection at the cable one end, and the tension sensor body and sensor moving piece of cable boss fixed connection in proper order, sensor moving piece is fixedly connected with cable force connecting component, cable force connecting component includes the fixed connection of connecting sleeve main part with sensor moving piece, the inside of connecting sleeve main part one end is equipped with the connecting plug -in rod of boss portion, the outer side of connecting sleeve main body is equipped with the sliding sleeve, through optimization connection structure, sensing mechanism and protection design, realized the comprehensive superiority of reliable connection, monitoring accurate, protection in place, installation maintenance convenient, can satisfy the engineering demand of bridge cable force long -term on -line monitoring effectively.

Description

Technical Field

[0001] This utility model relates to the technical field of beam cable force monitoring, specifically to an online monitoring device for bridge cable force. Background Technology

[0002] A bridge cable stress online monitoring device is an intelligent equipment system used to measure and monitor the stress state of bridge cables or suspenders in real time. It typically integrates sensors (such as fiber optic gratings, vibration frequency force gauges, or magnetic flux sensors), data acquisition modules, and wireless transmission technology to continuously collect cable stress change data. Combined with a data analysis platform, it can achieve dynamic early warning and structural health assessment. This device can effectively identify cable stress anomalies (such as stress fluctuations caused by overload, fatigue, or environmental factors), providing accurate basis for bridge safe operation and maintenance. It features automation, high precision, and long-term stability, and is widely used in the structural monitoring of long-span bridges such as cable-stayed bridges and suspension bridges.

[0003] Publication No. CN220454762U discloses a bridge cable-stayed bridge force monitoring device. A first and second fastening cylinder are located on the outer side of the connection between the first and second connecting cables. A connecting block is located on the right side of the second fastening cylinder. A metal fastening strip is located in the middle of the connecting block, and a fastening post is located at the end of the metal fastening strip. A connecting spring is located inside the fastening post, and a sloped telescopic post is located outside the connecting spring. The metal fastening strip is looped onto the fastening post. During fastening, the sloped telescopic post is compressed, causing it to retract inward. After the metal fastening strip is fastened, the sloped telescopic post is squeezed out by the connecting spring, locking the metal fastening strip in place. This prevents cable breakage due to a malfunctioning tension sensor. The protective components are simple and convenient to install, effectively improving the work efficiency of installers. However, this patent still has the following problems in actual use:

[0004] Although the cable-stayed cable force monitoring device of this kind relies on the metal fastening strap and the fastening post for the fastening structure at the cable connection, the limiting method of the slope expansion column inside the fastening post is not stable enough. At the same time, the fastening tube used to wrap the connection is lacking in protective performance and ease of disassembly and assembly, making it difficult to meet the requirements of connection structure stability, protection reliability and maintenance convenience when monitoring cable force.

[0005] Therefore, an online bridge cable tension monitoring device is proposed to address the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide an online monitoring device for bridge cable force, in order to solve the problems mentioned in the background art, such as insufficient stability of the fastening structure at the cable connection, lack of protective performance and ease of disassembly and assembly of the fastening cylinder, which make it difficult to meet the requirements of cable force monitoring for connection structure stability, protection reliability and maintenance convenience.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an online monitoring device for bridge cable tension, comprising a cable connection mechanism, a cable tension sensing mechanism, and a protective mechanism, wherein the cable connection mechanism comprises a symmetrically arranged cable one and a cable two, which are detachably connected by a cable tension connection component;

[0008] The cable force sensing mechanism includes a cable boss fixedly connected to one end of the cable, a force sensor body and a sensor moving piece fixedly connected in sequence with the cable boss, and the sensor moving piece is fixedly connected to the cable force connection assembly.

[0009] The cable connection assembly includes a connecting sleeve body fixedly connected to the sensor moving piece. The connecting sleeve body has a connecting rod with a protrusion inside one end. A sliding sleeve is fitted on the outside of the connecting sleeve body. The sliding sleeve and the connecting sleeve body are slidably engaged by a limiting structure. The connecting sleeve body has multiple through holes in the radial direction. Each through hole contains a steel ball. The steel ball forms a bidirectional limiting structure with the inner wall of the sliding sleeve and the protrusion.

[0010] The protective mechanism includes a cylindrical protective component covering the cable connection assembly, which consists of a detachably connected protective sleeve one and a protective sleeve two.

[0011] Preferably, the limiting structure includes limiting grooves symmetrically formed inside the sliding sleeve, and a limiting block and a spring are provided in the limiting groove. The limiting block is slidably engaged with the sliding sleeve and fixedly connected to the main body of the connecting sleeve, and the two ends of the spring are respectively connected to the limiting groove and the limiting block.

[0012] Preferably, there are four through holes that are evenly distributed circumferentially, and the diameters at both ends of the through holes are smaller than the diameter of the steel ball.

[0013] Preferably, the protective sleeve one is provided with a locking mechanism at each of the four top corners. The locking mechanism includes an outer sleeve disposed inside the protective sleeve one, one end of which is threaded to a base. The base is fixedly connected to the protective sleeve one. A second spring is fixedly connected to the center of the base. An inner sleeve is fixedly connected to the top of the second spring.

[0014] Preferably, one end of the inner sleeve has several limiting holes, the number of which is three and they are evenly distributed in the radial direction of the inner sleeve. A ball is provided in each limiting hole, and a pin is inserted and connected to the center of the top of the inner sleeve. The ball is in contact with both the inner wall of the outer sleeve and the surface of the pin.

[0015] Preferably, the inner ends of the first and second protective sleeves respectively form axial limits on the cable boss.

[0016] Preferably, the protective sleeve one, protective sleeve two, outer sleeve, base and pin rod are made of 304 stainless steel.

[0017] Preferably, the inner sleeve and the sphere are made of pure iron.

[0018] Preferably, the end structures of cable one and cable two are arranged in a mirror-symmetric manner.

[0019] Compared with existing technologies, the beneficial effects of this utility model are as follows: This online bridge cable force monitoring device, through optimized connection structure, sensing mechanism, and protective design, achieves comprehensive advantages such as reliable connection, accurate monitoring, adequate protection, and convenient installation and maintenance. It can effectively meet the engineering needs of long-term online monitoring of bridge cable force. The specific details are as follows:

[0020] 1. Regarding connection performance, the device achieves a detachable connection between cable one and cable two through a cable-stayed connection assembly. The bidirectional limiting structure of steel balls, sliding sleeves, and bosses ensures connection stability while simplifying installation and disassembly. Spring one in the limiting structure provides a stable preload to the sliding sleeve, ensuring the steel balls are always reliably positioned, effectively preventing loosening and improving the structural reliability of the device during long-term use.

[0021] 2. Regarding monitoring accuracy, the cable tension sensing mechanism employs a sequentially fixed connection structure of the cable boss, the tension sensor body, and the sensor moving plate. This ensures that the tension force on the cable is directly and accurately transmitted to the tension sensor body, reducing losses and errors during force transmission. The rigid connection between the sensor moving plate and the cable tension connection assembly further guarantees the real-time performance and accuracy of tension signal acquisition, providing reliable data support for online monitoring of bridge cable tension.

[0022] 3. In terms of protective performance, the protective mechanism adopts a cylindrical protective assembly consisting of a first protective sleeve and a second protective sleeve, which can fully cover the cable connection components. The detachable design of the first and second protective sleeves facilitates the inspection and maintenance of the internal components. At the same time, the first and second protective sleeves are made of 304 stainless steel, which has excellent corrosion resistance and wear resistance, extending the service life of the device.

[0023] 4. Regarding structural rationality, the end structures of cable one and cable two are mirror-symmetrically arranged, making the overall force distribution of the device more balanced and reducing the risk of local stress concentration. Four steel balls evenly distributed circumferentially in the through-hole ensure uniform force transmission between the connecting sleeve body and the connecting rod, further enhancing the structural stability of the device. Furthermore, the internal ends of protective sleeve one and protective sleeve two respectively form axial limits on the cable bosses, effectively restricting excessive axial displacement of the cables and enhancing the overall safety of the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the tensile sensor body in this utility model;

[0026] Figure 3 This is a schematic diagram of the cable connection component in this utility model;

[0027] Figure 4 This is a partial cross-sectional view of the main body of the connecting sleeve in this utility model;

[0028] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle;

[0029] Figure 6 This utility model Figure 2 Enlarged structural diagram of the central protective component;

[0030] Figure 7 This is a schematic diagram of the internal structure of the outer jacket in this utility model;

[0031] Figure 8 This is an exploded view of the protective component of this utility model.

[0032] In the diagram: 1. Cable 1; 2. Cable boss; 3. Tension sensor body; 4. Sensor moving piece; 5. Cable connection assembly; 501. Connecting sleeve body; 502. Connecting rod; 5021. Boss part; 503. Sliding sleeve; 504. Limiting groove; 505. Limiting block; 506. Spring 1; 507. Through hole; 508. Steel ball; 6. Cable 2; 7. Protective assembly; 701. Protective sleeve 1; 702. Protective sleeve 2; 703. Outer sleeve; 704. Base; 705. Spring 2; 706. Inner sleeve; 707. Limiting hole; 708. Ball; 709. Pin rod. Detailed Implementation

[0033] 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. Example

[0034] like Figure 1-8 As shown, the present invention provides a bridge cable force online monitoring device, which includes a cable connection mechanism, a cable force sensing mechanism and a protection mechanism. The mechanisms work together to realize real-time online monitoring of the cable force of the bridge.

[0035] like Figure 1-2 As shown, the cable connection mechanism includes symmetrically arranged cables 1 and 6, which are detachably connected by a cable tension connection component 5. This symmetrical cable structure can maintain a good balance when the bridge is under stress, while the detachable connection method provides convenience for the installation, maintenance and replacement of the device.

[0036] like Figure 2 As shown, the cable force sensing mechanism includes a cable boss 2 fixedly connected to the end of cable 1, a tension sensor body 3 and a sensor moving piece 4 fixedly connected in sequence to the cable boss 2, and the sensor moving piece 4 is fixedly connected to the cable force connecting assembly 5. The force on cable 1 can be transmitted to the tension sensor body 3 through the cable boss 2. The tension sensor body 3 can detect the magnitude of the force, and the force will be further transmitted to the sensor moving piece 4, and then from the sensor moving piece 4 to the cable force connecting assembly 5.

[0037] like Figure 3-4 As shown, the cable connection assembly 5 includes a connecting sleeve body 501 fixedly connected to the sensor moving piece 4. One end of the connecting sleeve body 501 has a connecting rod (502) with a protrusion 5021 inside, and the connecting rod 502 is fixedly connected to the second cable 6. A sliding sleeve 503 is fitted on the outer side of the connecting sleeve body 501, and the sliding sleeve 503 and the connecting sleeve body 501 are slidably engaged by a limiting structure. The limiting structure includes limiting grooves 504 symmetrically formed inside the sliding sleeve 503. A limiting block 505 and a spring 506 are provided within the limiting groove 504. The limiting block 505 is slidably engaged with the sliding sleeve 503 and fixedly connected to the connecting sleeve body 501, respectively. The two ends of the spring 506 are connected to the limiting groove 504 and the limiting block 505, respectively. When the sliding sleeve 503 slides relative to the connecting sleeve body 501, the limiting block 505 slides in the limiting groove 504, and the spring 506 will deform. The cooperation between the limiting groove 504 and the limiting block 505 can limit the sliding range of the sliding sleeve 503 and prevent the sliding sleeve 503 from falling off the connecting sleeve body 501.

[0038] like Figure 3-4 As shown, the connecting sleeve body 501 has multiple through holes 507 radially. In this embodiment, there are four through holes 507, which are evenly distributed circumferentially. The diameters at both ends of the through holes 507 are smaller than the diameter of the steel balls 508, which prevents the steel balls 508 from falling out of the through holes 507. Each through hole 507 contains a steel ball 508, and the steel ball (508) forms a bidirectional limiting structure with the inner wall of the sliding sleeve 503 and the boss portion 5021. When the connecting rod 502 is inserted into the connecting sleeve body 501, the boss 5021 pushes the steel ball 508 to move outward from the connecting sleeve body 501. At this time, the sliding sleeve 503 is reset under the action of the spring 506, and the inner wall of the sliding sleeve 503 limits the steel ball 508, so that the steel ball 508 is stuck between the boss 5021 and the inner wall of the sliding sleeve 503, thereby realizing the fixed connection between the connecting sleeve body 501 and the connecting rod 502. When disassembly is required, the sliding sleeve 503 is pulled so that the inner wall of the sliding sleeve 503 no longer limits the steel ball 508, and the connecting rod 502 can be pulled out from the connecting sleeve body 501.

[0039] like Figure 2 As shown, the protective mechanism includes a cylindrical protective component 7 covering the cable connection assembly 5. The protective component 7 consists of a detachably connected protective sleeve 701 and a protective sleeve 702. The protective sleeves 701 and 702 enclose the cables 1 and 6 at the cable connection assembly 5, providing dust protection and preventing external environmental factors from affecting the performance of the cable connection assembly 5. The inner ends of the protective sleeves 701 and 702 respectively provide axial restraint for the cable bosses 2, further enhancing the stability of the protective component 7 during installation.

[0040] like Figure 2 , Figure 7 and Figure 8As shown, the protective sleeve 701 has locking mechanisms at its four corners. Each locking mechanism includes an outer sleeve 703 inside the protective sleeve 701. One end of the outer sleeve 703 is threaded to a base 704, which is fixedly connected to the protective sleeve 701. A second spring 705 is fixedly connected to the center of the base 704, and an inner sleeve 706 is fixedly connected to the top of the second spring 705. One end of the inner sleeve 706 has several limiting holes 707. In this embodiment, there are three limiting holes 707 evenly distributed radially within the inner sleeve 706. A ball 708 is located within each limiting hole 707. A pin 709 is inserted through the center of the top of the inner sleeve 706. The ball 708 contacts both the inner wall of the outer sleeve 703 and the surface of the pin 709. The second protective sleeve 702 has a socket that mates with the pin 709. When it is necessary to fix the first protective sleeve 701 and the second protective sleeve 702, the pin 709 is inserted into the inner sleeve 706. The pin 709 will push the ball 708 to move outward of the limiting hole 707. The ball 708 contacts the inner wall of the outer sleeve 703 and forms a limit. At the same time, the second spring 705 is compressed, thereby locking the first protective sleeve 701 and the second protective sleeve 702. When it is necessary to open, the pin 709 is pulled. Under the action of the second spring 705, the inner sleeve 706 is reset, and the ball 708 is no longer pushed by the pin 709, thereby releasing the lock.

[0041] like Figure 8 As shown, protective sleeve 1 (701), protective sleeve 2 (702), outer sleeve (703), base (704), and pin rod (709) are made of 304 stainless steel. 304 stainless steel has good corrosion resistance and mechanical properties, ensuring the service life of these components. Inner sleeve (706) and sphere (708) are made of pure iron. Pure iron has good toughness and plasticity, meeting the usage requirements of the components.

[0042] like Figure 1 As shown, the end structures of cable 1 and cable 2 (6) are mirror-symmetrically arranged. This design ensures that cable 1 and cable 2 (6) are consistent in terms of force and connection method, which is beneficial to the overall balance and stability of the device.

[0043] Working principle: Before using this type of bridge cable tension online monitoring device, it is necessary to check the overall condition of the device to ensure it can function normally. Figure 1 - Figure 8 As shown, the mechanical transmission between cable 1 and cable 6 is achieved through a cable connection mechanism. A cable force sensing mechanism collects cable force data in real time, and a protective mechanism provides physical protection for the core components. When the bridge cables are under stress, the tension is transmitted sequentially through cable 1, cable boss 2, and then to the tension sensor body 3. The sensor moving piece 4 transmits the force value to the cable force connection assembly 5, ultimately acting on cable 6. The tension sensor body 3 simultaneously outputs an electrical signal to complete the cable force monitoring.

[0044] The mechanical transmission mechanism of the cable connection assembly: After receiving the tension through the sensor moving piece 4, the main body 501 of the connecting sleeve transmits the tension to the second cable 6 via the connecting rod 502. In the initial assembly state, the sliding sleeve 503 maintains its initial position under the preload of the spring 506, and the steel ball 508 simultaneously contacts the inner wall of the sliding sleeve 503 and the boss portion 5021 of the connecting rod 502, forming a bidirectional mechanical lock. When the cable is subjected to tension, the radial compressive force of the boss portion 5021 on the steel ball 508 increases, forcing the steel ball 508 to further clamp onto the inner wall of the sliding sleeve 503. The limiting structure of the through hole 507 (the diameter of the holes at both ends is smaller than the diameter of the steel ball) prevents the steel ball from falling out, thus achieving pull-out resistance strengthening of the connection assembly.

[0045] Locking and unlocking principle of the protective component: After the protective sleeve 1 701 and the protective sleeve 2 702 are closed, a cylindrical cavity is formed, and a rigid connection is achieved through the locking mechanism at the four apex. The axial limiting structure at both ends (in contact with the cable boss 2) prevents the protective component 7 from moving along the cable axis. During the locking process, when the protective sleeve 1 701 and the protective sleeve 2 702 are closed, the pin 709 is inserted into the center hole of the inner sleeve 706. In the initial state, the three spheres 708 are respectively embedded in the limiting holes 707 of the inner sleeve 706, and the spring 2 705 is in a naturally extended state. The diameter of the gap formed on the inner side of the spheres 708 is smaller than the diameter of the pin 709. When the pin 709 is inserted downward, its surface presses against the spheres 708 and pushes the inner sleeve 706 to compress the spring 2 705, causing the inner sleeve 706 to move downward along the conical inner wall of the outer sleeve 703. The conical structure of the outer sleeve 703 forces the ball 708 to move radially outward, and the gap diameter gradually widens as it moves downward until the pin 709 is fully inserted. At this time, the rebound force of the second spring 705 pushes the inner sleeve 706 upward, and the ball 708 contracts inward under the constraint of the conical inner wall, tightly biting the surface of the pin 709 to form a self-locking mechanism. When the pin is pulled out by an external force, the upward pulling force drives the inner sleeve 706 and the ball 708 upward, and the conical inner wall of the outer sleeve 703 generates a radially inward squeezing force on the ball 708, so that the biting force between the ball 708 and the pin 709 increases with the increase of the pulling force, thus achieving mechanical anti-disengagement.

[0046] During the unlocking process, when the unlocking device (permanent magnet) approaches the latch, the pure iron inner sleeve 706 and the ball 708 are attracted by magnetic force, overcoming the elastic force of the spring 705 and moving downwards. During this process, the ball 708 moves downwards along the conical inner wall of the outer sleeve 703, the radial constraint is released, and the diameter of the inner gap increases to be larger than the diameter of the pin 709. At this point, the pin 709 can be easily pulled out to complete the unlocking.

[0047] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bridge cable tension online monitoring device, comprising a cable connection mechanism, a cable tension sensing mechanism, and a protective mechanism, characterized in that: The cable connection mechanism includes a symmetrically arranged cable one (1) and cable two (6), which are detachably connected by a cable force connection component (5); The cable force sensing mechanism includes a cable boss (2) fixedly connected to the end of the cable (1), a tension sensor body (3) and a sensor moving piece (4) fixedly connected to the cable boss (2) in sequence, and the sensor moving piece (4) is fixedly connected to the cable force connection assembly (5). The cable connection assembly (5) includes a connecting sleeve body (501) fixedly connected to the sensor moving piece (4). One end of the connecting sleeve body (501) is provided with a connecting rod (502) with a boss (5021). A sliding sleeve (503) is sleeved on the outside of the connecting sleeve body (501). The sliding sleeve (503) and the connecting sleeve body (501) are slidably engaged by a limiting structure. The connecting sleeve body (501) is provided with a plurality of through holes (507) in the radial direction. Each through hole (507) is provided with a steel ball (508). The steel ball (508) forms a bidirectional limiting structure with the inner wall of the sliding sleeve (503) and the boss (5021). The protective mechanism includes a cylindrical protective component (7) covering the cable connection assembly (5), the protective component (7) being composed of a detachably connected protective sleeve one (701) and a protective sleeve two (702).

2. The bridge cable tension online monitoring device according to claim 1, characterized in that: The limiting structure includes a limiting groove (504) symmetrically opened inside the sliding sleeve (503). The limiting groove (504) is provided with a limiting block (505) and a spring (506). The limiting block (505) is slidably engaged with the sliding sleeve (503) and fixedly connected to the connecting sleeve body (501). The two ends of the spring (506) are respectively connected to the limiting groove (504) and the limiting block (505).

3. The bridge cable tension online monitoring device according to claim 1, characterized in that: The number of through holes (507) is four and they are evenly distributed circumferentially. The diameters of the two ends of the through holes (507) are smaller than the diameter of the steel ball (508).

4. The bridge cable tension online monitoring device according to claim 1, characterized in that: The protective sleeve (701) is provided with a locking mechanism at each of its four corners. The locking mechanism includes an outer sleeve (703) located inside the protective sleeve (701). One end of the outer sleeve (703) is threadedly connected to a base (704). The base (704) is fixedly connected to the protective sleeve (701). A second spring (705) is fixedly connected to the center of the base (704). An inner sleeve (706) is fixedly connected to the top of the second spring (705).

5. The bridge cable tension online monitoring device according to claim 4, characterized in that: The inner sleeve (706) has a plurality of limiting holes (707) at one end. There are three limiting holes (707) and they are evenly distributed in the radial direction of the inner sleeve (706). A ball (708) is provided in the limiting hole (707). A pin (709) is inserted and connected at the center of the top of the inner sleeve (706). The ball (708) is in contact with the inner wall of the outer sleeve (703) and the surface of the pin (709).

6. The bridge cable tension online monitoring device according to claim 1, characterized in that: The protective sleeve one (701) and the protective sleeve two (702) respectively form axial limits on the cable boss (2) at both ends.

7. The bridge cable tension online monitoring device according to claim 4, characterized in that: The protective sleeve one (701), protective sleeve two (702), outer sleeve (703), base (704) and pin rod (709) are made of 304 stainless steel.

8. The bridge cable tension online monitoring device according to claim 5, characterized in that: The inner sleeve (706) and the sphere (708) are made of pure iron.

9. The bridge cable tension online monitoring device according to claim 1, characterized in that: The end structures of cable one (1) and cable two (6) are arranged in a mirror symmetrical manner.

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