Suspension bridge cable clamp slip monitoring device

Abstract

A kind of suspension bridge cable clamp slip monitoring device, including cable clamp, main cable, reference support, displacement encoder, main protection box and main cable maintenance pass column;The left end of the cable clamp is located outside the main cable and is provided with a reference support, and the cable clamp is parallelly arranged with the reference support;The cable clamp includes upper cable clamp and lower cable clamp, and the upper cable clamp and the lower cable clamp are symmetrically locked and arranged, the main cable is arranged between the upper cable clamp and the lower cable clamp, and the two ends of the main cable respectively penetrate the upper cable clamp and the lower cable clamp;The displacement encoder includes displacement encoder steel wire rope, encoder body, steel wire rope fixed connecting piece;The encoder body is installed at the right side of the upper end of the reference support, the right side of the encoder body is connected with one end of the displacement encoder steel wire rope, the other end of the displacement encoder steel wire rope is connected with the steel wire rope fixed connecting piece, and the other end of the steel wire rope fixed connecting piece is connected with the left upper end of the upper cable clamp.The present application can quickly and accurately judge whether the cable clamp will appear slip trend by direct measurement.

Description

Technical Field

[0001] This invention relates to an improvement in the monitoring technology for cable clamp slippage of suspension bridges, belonging to the field of bridge engineering, and particularly to a monitoring device for cable clamp slippage of suspension bridges. Background Technology

[0002] The main cable of a suspension bridge is the most critical load-bearing component of the entire bridge. The cable clamps are fastened to the surface of the main cable by high-strength screws. Their core function is to evenly transfer the bridge deck load to the main cable through the suspenders. The fastening force between the cable clamps and the main cable depends entirely on the static friction force generated by the pre-tightening axial force of the screws. During the design and operation phases, it is necessary to ensure that this friction force is greater than the vertical component force transmitted by the suspenders in order to prevent the cable clamps from slipping axially.

[0003] Cable clamp slippage is an extremely dangerous structural defect in the operation of suspension bridges: once slippage occurs, it will directly change the theoretical length of the suspension cables, causing distortion of the bridge deck alignment and seriously affecting driving comfort and safety; more seriously, slippage will cause redistribution of internal forces throughout the bridge structure, breaking the original force balance, and if it is not detected and dealt with in time, it may eventually lead to a catastrophic collapse accident.

[0004] Currently, the industry still generally uses traditional manual inspection methods to monitor cable clamp slippage, mainly including two approaches: one is the visual marking method, which involves painting marks on the contact point between the cable clamp edge and the main cable, and periodically inspecting to see if the marks are misaligned. This method is simple to operate but has extremely low accuracy, cannot identify early micro-slippage at the millimeter level, and the monitoring results are highly dependent on the experience and sense of responsibility of the inspectors; the other is the caliper measurement method, which involves using tools such as vernier calipers to periodically measure the distance between the cable clamp port and a fixed reference point on the main cable. This method has limited accuracy, requires high-altitude operation, has high safety risks, and low operational efficiency.

[0005] The aforementioned traditional methods are all discrete monitoring means, which cannot continuously capture the instantaneous slippage trend of the cable clamp under the action of dynamic factors such as temperature changes, vehicle dynamic loads, and wind loads. Often, by the time obvious slippage is discovered during manual inspection, the cable clamp has already been damaged.

[0006] Chinese patent application CN202310754047.6, filed on June 26, 2023, discloses a cable clamp that uses ultrasonic waves to intelligently monitor the preload of a screw. The intelligent cable clamp includes an upper clamp, a lower clamp, a main cable, a screw, and an ultrasonic sensor. The bottom of the upper clamp and the top of the lower clamp fit together to form a main cable placement cavity, in which the main cable is axially inserted. Multiple upper screw holes are formed at the front and rear ends of the top of the upper pressure plate of the upper clamp, and multiple lower screw holes are formed at the front and rear ends of the bottom of the lower pressure plate of the lower clamp. The upper and lower screw holes on the front and rear sides are connected. This method converts the ultrasonic transmission time variation into different axial forces; however, the measurement is indirect and cannot quickly and accurately determine whether the cable clamp will slip.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this patent application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0008] The purpose of this invention is to overcome the problem in the prior art that indirect measurement cannot quickly and accurately determine whether the cable clamp will slip, and to provide a suspension bridge cable clamp slip monitoring device that can quickly and accurately determine whether the cable clamp will slip by direct measurement.

[0009] To achieve the above objectives, the technical solution of the present invention is: a suspension bridge cable clamp slippage monitoring device, which includes cable clamps, main cables, reference supports, displacement encoders, main protective boxes, and main cable maintenance track columns;

[0010] The left end of the cable clamp is provided with a reference bracket on the outer side of the main cable, and the cable clamp is set parallel to the reference bracket.

[0011] The cable clamp includes an upper cable clamp and a lower cable clamp, which are symmetrically locked together. The main cable is positioned between the upper cable clamp and the lower cable clamp, with both ends of the main cable passing through the upper cable clamp and the lower cable clamp respectively.

[0012] The displacement encoder includes a displacement encoder wire rope, an encoder body, and a wire rope fixing connector;

[0013] The encoder body is installed on the upper right side of the reference bracket. The right side of the encoder body is connected to one end of the displacement encoder wire rope. The other end of the displacement encoder wire rope is connected to the wire rope fixing connector. The other end of the wire rope fixing connector is connected to the upper left side of the upper cable clamp.

[0014] The displacement encoder is connected to the data acquisition and processing module of the main protection box via a connecting line. The main cable maintenance track column is installed on both the front and rear of the upper cable clamp, and the main protection box is installed on the main cable maintenance track column.

[0015] Multiple solar panels are installed on the main cable maintenance track pillars.

[0016] The reference bracket includes an upper clamp and a lower clamp;

[0017] The upper and lower halves of the clamp are connected by multiple sets of clamp bolts.

[0018] Connecting seats are installed at both ends of the upper half clamp and both ends of the lower half clamp;

[0019] The clamp bolts are threaded into the two connecting seats.

[0020] The displacement encoder also includes an encoder base, the right side of which is connected to the left side of the encoder body;

[0021] The left side of the encoder base is connected to the right side of the upper clamp, and the encoder base is located at the upper end of the upper clamp.

[0022] The side of the encoder base is connected to the side of the upper clamp by multiple sets of encoder mounting bolts.

[0023] The encoder body is installed on the right side of the upper clamp.

[0024] The top of the upper cable clamp is equipped with a protruding plate, and a connecting hole is opened on the side of the protruding plate near the wire rope fixing connector. The other end of the wire rope fixing connector is embedded in the connecting hole.

[0025] The distance between the encoder body and the center of the upper clamp is greater than the distance between the protrusion plate and the center of the upper cable clamp.

[0026] The encoder wire rope is arranged parallel to the main cable.

[0027] The main protective box contains a storage battery, which is connected to the solar panel via a cable.

[0028] The main protective box is equipped with a data acquisition and processing module and a data transmission module. The input end of the data acquisition and processing module of the displacement encoder is connected, and the output end of the data acquisition and processing module is connected to the data receiving unit in the monitoring room through the data transmission module. The output end of the data receiving unit in the monitoring room is connected to the input end of the industrial control computer.

[0029] The industrial control computer is connected to the database via signals.

[0030] The displacement encoder, data acquisition and processing module, monitoring room data receiving unit, database, and industrial control computer are respectively connected to the line unit.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. In a suspension bridge cable clamp slippage monitoring device of the present invention, a reference support is set on the left end of the cable clamp outside the main cable, and the cable clamp is set parallel to the reference support; the cable clamp includes an upper cable clamp and a lower cable clamp, which are symmetrically locked together, and the main cable is set between the upper and lower cable clamps, with both ends of the main cable passing through the upper and lower cable clamps respectively; the displacement encoder includes a displacement encoder wire rope, an encoder body, and a wire rope fixing connector; the encoder body is installed on the upper right side of the reference support, the right side of the encoder body is connected to one end of the displacement encoder wire rope, the other end of the displacement encoder wire rope is connected to the wire rope fixing connector, and the other end of the wire rope fixing connector is connected to the upper left side of the upper cable clamp; the displacement encoder is connected to the main protection box through a connecting line, and main cable maintenance track columns are installed on both the front and rear sides of the upper cable clamp, with the main protection box installed on the main cable maintenance track columns; the main cable maintenance track... Multiple solar panels are installed on the column. During application, after the displacement encoder is installed, the system is first calibrated, setting the real-time reading of the displacement encoder as the system zero point. During operation, the displacement encoder continuously measures the real-time extension and contraction of the wire rope. The data acquisition and processing module continuously collects the raw data of this extension and contraction at a pre-set acquisition frequency, converting it into the absolute slippage of the cable clamp relative to the main cable. Based on the continuously acquired time-series data, it automatically calculates the slippage rate per unit time. The processed slippage and slippage rate data are periodically reported or event-triggered reports sent to the data processing server at the remote monitoring center. Once the cumulative absolute slippage of any cable clamp measuring point exceeds the set alarm threshold, the system will immediately push an alarm of the corresponding level to the management personnel, prompting a special inspection and tightening operation of the screw axial force of the cable clamp. The advantages of this design are as follows:

[0033] Firstly, the direct relative displacement measurement method is adopted. Data is continuously collected at a set frequency through the data acquisition module to form a complete slip time series curve. This can clearly present the entire process of slip occurrence and development, accurately distinguish between periodic micro-fluctuations caused by thermal expansion and contraction and the true continuous slip trend, and directly output the real-time slip amount and slip rate of the cable clamp relative to the main cable. All factors that cause cable clamp displacement can be captured without discrimination, realizing the deterministic judgment of slip trend.

[0034] Secondly, the encoder body is installed on the upper end of the reference bracket, and its wire rope is directly connected to the upper part of the original structure of the cable clamp through a special connector. No structural modification or processing of the cable clamp is required, which ensures the directness and accuracy of displacement transmission without damaging the load-bearing system and sealing performance of the cable clamp.

[0035] Thirdly, the reference bracket is directly fixed to the outer perimeter of the main cable next to the cable clamp to be monitored. It is set parallel to the cable clamp and has no structural interference. No drilling, welding or cutting work is required on the cable clamp body. The integrity and load-bearing performance of the original cable clamp are preserved, and structural safety hazards that may be caused by the modification are avoided.

[0036] Fourthly, the entire set of equipment can be directly installed on any type of existing suspension bridge cable clamps without the need for customized cable clamp or screw design. It has a short construction period, minimal impact on bridge operation, and can quickly achieve large-scale deployment of a full-bridge cable clamp slippage monitoring network.

[0037] Therefore, the direct measurement method of this invention can quickly and accurately determine whether the cable clamp will slip.

[0038] 2. In this invention, a suspension bridge cable clamp slippage monitoring device features independent connecting seats at both ends of the upper and lower clamps. Multiple sets of clamp bolts are symmetrically fastened through corresponding connecting seats, distributing the clamping force evenly across the entire contact surface between the clamp and the main cable, preventing localized stress concentration. By precisely controlling the bolt preload torque, sufficient static friction is generated between the clamp and the main cable, effectively resisting external forces such as temperature changes, vehicle dynamic loads, and wind vibration, preventing the reference support from slipping relative to the main cable and providing a long-term stable absolute reference for displacement measurement. The connecting seats are integrally formed with the clamp ends, significantly enhancing the structural strength and bending stiffness of the clamp ends, ensuring that the installation foundation of the displacement encoder will not loosen or shift under the long-term dynamic operation environment of the bridge. Therefore, this invention is stable and convenient to use.

[0039] 3. In this invention, a suspension bridge cable clamp slippage monitoring device utilizes an independent encoder base to achieve a transitional connection between the encoder body and the upper clamp, employing a multi-set bolt thread fastening method on the side. This avoids structural weakening caused by drilling holes on the clamp end face. The multi-point side connection significantly enhances the installation structure's vibration and impact resistance, resisting external interference such as vehicle dynamic loads and wind vibration, ensuring the encoder body will not loosen or shift under the long-term dynamic operation environment of the bridge. The protruding plate and embedded connection hole design on the top of the upper cable clamp eliminate the need for drilling and welding on the cable clamp's main load-bearing structure, fully preserving the cable clamp's structural integrity and load-bearing performance. The rigid connection method, with the wire rope fixing connector embedded inside the connection hole, achieves coaxial fixation between the rope and the cable clamp, preventing loosening of the connector and lateral sway, ensuring that the axial slippage of the cable clamp can be transmitted to the displacement encoder without loss or deviation. Therefore, this invention offers strong installation rigidity and eliminates reference offset. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the present invention.

[0041] Figure 2 This is a schematic diagram of the installation of the displacement encoder in this invention.

[0042] Figure 3 This is a side view of the displacement encoder in this invention.

[0043] Figure 4 This is a connection diagram of the wireless monitoring method in this invention.

[0044] Figure 5 This is a connection diagram of the wired monitoring method of the present invention.

[0045] In the diagram: Cable clamp 1, upper cable clamp 101, lower cable clamp 102, main cable 2, reference bracket 3, upper half clamp 31, connecting seat 311, lower half clamp 32, clamp bolt 33, connecting line 4, displacement encoder 5, displacement encoder wire rope 51, encoder body 52, encoder base 53, mounting bolt 54, wire rope fixing connector 55, main protection box 6, main cable maintenance path column 7, data acquisition and processing module 8, data transmission module 9, solar panel 10, monitoring room data receiving unit 11, database 12, protruding plate 13, line unit 14, storage battery 15. Detailed Implementation

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] See Figures 1 to 5 A suspension bridge cable clamp slippage monitoring device, the suspension bridge cable clamp slippage monitoring device includes cable clamp 1, main cable 2, reference support 3, displacement encoder 5, main protection box 6 and main cable maintenance channel column 7;

[0048] The left end of the cable clamp 1 is provided with a reference bracket 3 on the outer side of the main cable 2, and the cable clamp 1 is arranged parallel to the reference bracket 3.

[0049] The cable clamp 1 includes an upper cable clamp 101 and a lower cable clamp 102, which are symmetrically locked together. The main cable 2 is arranged between the upper cable clamp 101 and the lower cable clamp 102, and both ends of the main cable 2 pass through the upper cable clamp 101 and the lower cable clamp 102 respectively.

[0050] The displacement encoder 5 includes a displacement encoder wire rope 51, an encoder body 52, and a wire rope fixing connector 55.

[0051] The encoder body 52 is installed on the upper right side of the reference bracket 3. The right side of the encoder body 52 is connected to one end of the displacement encoder wire rope 51. The other end of the displacement encoder wire rope 51 is connected to the wire rope fixing connector 55. The other end of the wire rope fixing connector 55 is connected to the upper left side of the upper cable clamp 101.

[0052] The displacement encoder 5 is connected to the data acquisition and processing module 8 of the main protection box 6 via the connecting line 4. The main cable maintenance track column 7 is installed on both the front and rear sides of the upper cable clamp 101, and the main protection box 6 is installed on the main cable maintenance track column 7.

[0053] Multiple sets of solar panels 10 are installed on the main cable maintenance track column 7.

[0054] The reference bracket 3 includes an upper clamp 31 and a lower clamp 32;

[0055] The upper half clamp 31 and the lower half clamp 32 are connected on opposite sides by multiple sets of clamp bolts 33.

[0056] Connecting seats 311 are installed at both ends of the upper half clamp 31 and both ends of the lower half clamp 32;

[0057] The clamp bolt 33 is threadedly engaged with the two connecting seats 311.

[0058] The displacement encoder 5 also includes an encoder base 53, the right side of which is connected to the left side of the encoder body 52.

[0059] The left side of the encoder base 53 is connected to the right side of the upper clamp 31, and the encoder base 53 is located at the upper end of the upper clamp 31.

[0060] The side of the encoder base 53 is threadedly connected to the side of the upper clamp 31 by multiple sets of encoder mounting bolts 54.

[0061] The top of the upper cable clamp 101 is equipped with a protruding plate 13. The protruding plate 13 has a connecting hole 131 on the side near the wire rope fixing connector 55. The other end of the wire rope fixing connector 55 is embedded in the connecting hole 131.

[0062] The distance between the encoder body 52 and the center of the upper half clamp 31 is greater than the distance between the protrusion plate 13 and the center of the upper cable clamp 101.

[0063] The encoder wire rope 51 is arranged parallel to the main cable 2.

[0064] The main protective box 6 is equipped with a storage battery 15, which is connected to the solar panel 10 via a cable.

[0065] A monitoring system for a suspension bridge cable clamp slippage monitoring device, wherein the main protective box 6 is equipped with a data acquisition and processing module 8 and a data transmission module 9, the data acquisition of the displacement encoder 5 is connected to the input end of the data acquisition and processing module 8, the output end of the processing module 8 is connected to the data receiving unit 11 in the monitoring room through the data transmission module 9, and the output end of the data receiving unit 11 in the monitoring room is connected to the input end of the industrial control computer 13.

[0066] The industrial control computer 13 is connected to the database 12 via a signal.

[0067] The displacement encoder 5, data acquisition and processing module 8, monitoring room data receiving unit 11, database 12, and industrial control computer 13 are respectively connected to the line unit 14.

[0068] The supplementary technical features of this design are as follows:

[0069] The system can also integrate a temperature sensor to perform temperature compensation for the displacement measurement system, eliminating measurement errors caused by thermal expansion and contraction.

[0070] Example 1:

[0071] A suspension bridge cable clamp slippage monitoring device includes a cable clamp 1, a main cable 2, a reference support 3, a displacement encoder 5, a main protective box 6, and a main cable maintenance access post 7. The reference support 3 is located on the outer perimeter of the main cable 2 at the left end of the cable clamp 1, and the cable clamp 1 and the reference support 3 are arranged parallel to each other. The cable clamp 1 includes an upper cable clamp 101 and a lower cable clamp 102, which are symmetrically locked together. The main cable 2 is positioned between the upper cable clamp 101 and the lower cable clamp 102, with both ends of the main cable 2 passing through the upper cable clamp 101 and the lower cable clamp 102 respectively. The displacement encoder 5 includes a displacement encoder wire rope 51 and an encoder body 52. The encoder body 52 is installed on the upper right side of the reference bracket 3. The right side of the encoder body 52 is connected to one end of the displacement encoder wire rope 51, and the other end of the displacement encoder wire rope 51 is connected to the wire rope fixing connector 55. The other end of the wire rope fixing connector 55 is connected to the upper left side of the upper cable clamp 101. The displacement encoder 5 is connected to the data acquisition and processing module 8 of the main protection box 6 through the connecting line 4. The upper cable clamp 101 is equipped with main cable maintenance track columns 7 on both the front and rear sides. The main protection box 6 is installed on the main cable maintenance track columns 7. Multiple sets of solar panels 10 are installed on the main cable maintenance track columns 7.

[0072] In application: After the displacement encoder 5 is installed, the system is first calibrated. The real-time reading of the displacement encoder 5 is set as the system zero point, that is, the initial slippage of the cable clamp 1 relative to the main cable 2 is recorded as zero. After the equipment is put into operation, the displacement encoder 5 continuously measures the real-time extension and contraction of its wire rope 51. The data acquisition and processing module 8 continuously acquires the raw data of this extension and contraction according to the preset acquisition frequency. On the one hand, it converts it into the absolute slippage of the cable clamp 1 relative to the main cable 2. On the other hand, it automatically calculates the unit time based on the continuously acquired time-series data. The processed slippage amount and slippage rate data are sent to the server periodically or by event triggering. If communication is interrupted during this process, the data will be temporarily stored in the local storage unit of the main protection box. Once communication is restored, all unreported data will be automatically retransmitted. Once the cumulative absolute slippage amount of any cable clamp 1 measuring point exceeds the set first-level alarm threshold, or the slippage rate is continuously positive and exceeds the preset safety threshold, the system will immediately push the corresponding level of alarm to the management personnel, prompting them to carry out special inspection and tightening operations on the screw axial force of the cable clamp.

[0073] Example 2:

[0074] Example 2 is basically the same as Example 1, except that:

[0075] The reference bracket 3 includes an upper clamp 31 and a lower clamp 32; the upper clamp 31 and the lower clamp 32 are connected to each other by multiple sets of clamp bolts 33; the front and rear ends of the upper clamp 31 and the front and rear ends of the lower clamp 32 are each equipped with a connecting seat 311; the clamp bolts 33 are threaded into the two connecting seats 311.

[0076] In application: The reference support adopts a split clamp structure design, which enables the reference support to be quickly installed on the main cable without any modification to the main cable 2. It is suitable for the monitoring and renovation needs of various existing suspension bridges. At the same time, the multiple sets of connecting seats and clamp bolts symmetrically arranged at the front and rear ends can apply clamping force evenly, so that the upper and lower clamp halves are tightly attached to the surface of the main cable 2, avoiding local stress concentration, ensuring that sufficient static friction is generated between the reference support and the main cable, effectively resisting external forces such as temperature changes, vehicle dynamic loads, and wind loads, and preventing the reference support 3 from slipping relative to the main cable 2, thus providing a stable measurement reference for the displacement encoder 5.

[0077] Example 3:

[0078] Example 3 is basically the same as Example 1, except that:

[0079] The displacement encoder 5 also includes an encoder base 53, the right side of which is connected to the left side of the encoder body 52; the left side of the encoder base 53 is connected to the right side of the upper clamp 31, and the encoder base 53 is located at the upper end of the upper clamp 31; the side of the encoder base 53 is threadedly connected to the side of the upper clamp 31 by multiple sets of encoder mounting bolts 54; a protruding plate 13 is installed on the top of the upper cable clamp 101, and a connecting hole 131 is opened on the side of the protruding plate 13 near the wire rope fixing connector 55, and the other end of the wire rope fixing connector 55 is embedded in the connecting hole 131; the distance between the encoder body 52 and the center of the upper clamp 31 is greater than the distance between the protruding plate 13 and the center of the upper cable clamp 101; the displacement encoder wire rope 51 is arranged parallel to the main cable 2.

[0080] In application: The encoder base 53 is secured to the upper clamp 31 via multiple sets of encoder mounting bolts 54 on its side, thus firmly mounting the encoder body 52 onto the upper end of the upper clamp 31. This avoids structural weakening caused by directly drilling holes in the clamp body and significantly improves the vibration and impact resistance of the mounting structure through multi-point side connections, effectively resisting external interference such as vehicle dynamic loads and wind vibration, and preventing the encoder body 52 from loosening or shifting. The design of the special protrusion plate 13 on the top of the upper cable clamp 101 and the embedded connection hole 131 eliminates the need for additional support on the cable clamp body. Drilling holes in the heavy structure will not damage the original load-bearing performance of the cable clamp. At the same time, the connection method in which the wire rope fixing connector 55 is embedded in the connection hole 131 avoids the connector from loosening, shaking or lateral swaying, ensuring the directness and accuracy of displacement transmission. A safety distance greater than the radius of the cable clamp is reserved between the encoder body 52 and the upper clamp 31, which allows for the extension stroke of the cable clamp to accommodate the maximum slippage. The precise installation requirement of the displacement encoder wire rope 51 being strictly parallel to the main cable 2 ensures that the extension of the pull rope is consistent with the axial slippage of the cable clamp relative to the main cable.

[0081] Example 4:

[0082] Example 4 is basically the same as Example 1, except that:

[0083] The main protective box 6 is equipped with a data acquisition and processing module 8 and a data transmission module 9. The data acquisition of the displacement encoder 5 is connected to the input end of the data acquisition and processing module 8. The output end of the data acquisition and processing module 8 is connected to the data receiving unit 11 in the monitoring room through the data transmission module 9. The output end of the data receiving unit 11 in the monitoring room is connected to the input end of the industrial control computer 13. The industrial control computer 13 is connected to the database 12 via signal.

[0084] In application: The data acquisition and processing module 8 continuously collects the raw data of the telescopic movement according to a preset acquisition frequency. On the one hand, it converts the data into the absolute slippage of the cable clamp 1 relative to the main cable 2. On the other hand, it automatically calculates the slippage rate per unit time based on the continuously acquired time-series data. The processed slippage amount and slippage rate data will be sent to the data processing server A of the remote monitoring center through the data transmission module 9, either periodically or by event triggering. If a communication interruption occurs during this process, the data will be temporarily stored in the local storage unit of the main protection box until communication is restored. After the signal is restored, all unreported data will be automatically retransmitted. After receiving the data, the data receiving unit 11 in the monitoring room will transmit it to the industrial control computer 13 for further processing and store it in the database 12 for long-term preservation. The data processing server A will display the slippage status of the cable clamps at all monitoring points in real time. Once the cumulative absolute slippage of any cable clamp 1 measuring point exceeds the set first-level alarm threshold, such as 5mm, or the slippage rate is continuously positive and exceeds the preset safety threshold, the system will immediately push the corresponding level alarm to the management personnel, prompting them to carry out special inspection and tightening operations on the screw axial force of the cable clamp.

[0085] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A suspension bridge cable clamp slippage monitoring device, characterized in that: The suspension bridge cable clamp slippage monitoring equipment includes cable clamps (1), main cable (2), reference support (3), displacement encoder (5), main protection box (6) and main cable maintenance channel column (7). The left end of the cable clamp (1) is located on the outer side of the main cable (2) and a reference bracket (3) is provided. The cable clamp (1) and the reference bracket (3) are arranged parallel to each other. The cable clamp (1) includes an upper cable clamp (101) and a lower cable clamp (102), which are symmetrically locked together. The main cable (2) is located between the upper cable clamp (101) and the lower cable clamp (102), and both ends of the main cable (2) pass through the upper cable clamp (101) and the lower cable clamp (102) respectively. The displacement encoder (5) includes a displacement encoder wire rope (51), an encoder body (52), and a wire rope fixing connector (55); The encoder body (52) is installed on the upper right side of the reference bracket (3). The right side of the encoder body (52) is connected to one end of the displacement encoder wire rope (51). The other end of the displacement encoder wire rope (51) is connected to the wire rope fixing connector (55). The other end of the wire rope fixing connector (55) is connected to the upper left side of the upper cable clamp (101). The displacement encoder (5) is connected to the data acquisition and processing module (8) of the main protection box (6) via the connecting line (4). The main cable maintenance channel column (7) is installed on both the front and back of the upper cable clamp (101), and the main protection box (6) is installed on the main cable maintenance channel column (7). Multiple sets of solar panels (10) are installed on the main cable maintenance channel column (7).

2. The suspension bridge cable clamp slippage monitoring device according to claim 1, characterized in that: The reference bracket (3) includes an upper clamp (31) and a lower clamp (32). The upper half clamp (31) and the lower half clamp (32) are connected to each other by multiple sets of clamp bolts (33); The encoder body (52) is installed on the upper right side of the upper half clamp (31).

3. The suspension bridge cable clamp slippage monitoring device according to claim 2, characterized in that: Connecting seats (311) are installed at both ends of the upper half clamp (31) and both ends of the lower half clamp (32). The clamp bolt (33) is threadedly engaged with the two connecting seats (311).

4. The suspension bridge cable clamp slippage monitoring device according to claim 3, characterized in that: The displacement encoder (5) also includes an encoder base (53), the right side of which is connected to the left side of the encoder body (52); The left side of the encoder base (53) is connected to the right side of the upper half clamp (31), and the encoder base (53) is located at the upper end of the upper half clamp (31).

5. A suspension bridge cable clamp slippage monitoring device according to claim 4, characterized in that: The side of the encoder base (53) is threadedly connected to the side of the upper clamp (31) by multiple sets of encoder mounting bolts (54).

6. A suspension bridge cable clamp slippage monitoring device according to claim 2, characterized in that: The top of the upper cable clamp (101) is equipped with a protruding plate (13), and a connecting hole (131) is opened on the side of the protruding plate (13) near the wire rope fixing connector (55). The other end of the wire rope fixing connector (55) is embedded in the connecting hole (131). The distance between the encoder body (52) and the center of the upper half clamp (31) is greater than the distance between the protrusion plate (13) and the center of the upper cable clamp (101).

7. A suspension bridge cable clamp slippage monitoring device according to claim 6, characterized in that: The encoder wire rope (51) is arranged parallel to the main cable (2).

8. The suspension bridge cable clamp slippage monitoring device according to claim 1, characterized in that: The main protective box (6) is equipped with a storage battery (15), and the storage battery (15) is connected to the solar panel (10) by a cable.

9. A suspension bridge cable clamp slippage monitoring device according to claim 1, characterized in that: The main protective box (6) is equipped with a data acquisition and processing module (8) and a data transmission module (9). The signal of the displacement encoder (5) is connected to the input end of the data acquisition and processing module (8). The output end of the data acquisition and processing module (8) is connected to the monitoring room data receiving unit (11) through the data transmission module (9). The output end of the monitoring room data receiving unit (11) is connected to the input end of the industrial control computer (13). The industrial control computer (13) is connected to the database (12) via signals.

10. A suspension bridge cable clamp slippage monitoring device according to claim 9, characterized in that: The displacement encoder (5), processing module (8), monitoring room data receiving unit (11), database (12), and industrial control computer (13) are respectively connected to the line unit (14).

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