A fire protection and early warning monitoring system suitable for cable bridges

Abstract

The application provides a fireproof protection and early warning monitoring system suitable for a cable-stayed bridge, which comprises a fireproof protection system and a monitoring and early warning system. The fireproof protection system comprises a protection sleeve system, a communication pipeline and a connecting fitting; the protection sleeve system is coated outside the cable to be protected to form a "protective coat" and is composed of a plurality of protection sleeve units; each protection sleeve unit is of a hollow double-layer structure and is a closed cavity; water is injected into the space surrounded by the inner and outer walls of the protection sleeve main body; the protection sleeve units are connected with each other through the communication pipeline at the lower part, and the water flows between the different protection sleeve units. The monitoring and early warning system can realize automatic monitoring of whether the bridge catches fire, early warning, and monitoring and automatic adjustment of the system working state. The application can keep the temperature of the steel cable at a relatively low level all the time, has good durability, needs less daily maintenance, has strong automatic working capacity, is flexible to install, automatically monitors and warns, and effectively protects the fire safety of the bridge.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge disaster resistance, in particular to fireproof disaster resistance technology. BACKGROUND

[0002] Bridge destruction and even collapse in fire is one of the secondary disasters of fire, and bridge fire has caused great loss to human life and property. However, compared with building fire, bridge fire has the characteristics of low frequency and easy escape, and is often ignored by people. However, bridge steel cable is not fire-resistant, when the temperature rises to 300℃, the surface corrosion-resistant layer begins to burn and fall off, and its durability is greatly reduced; when the temperature rises to 600℃, the steel cable will lose most of its strength, causing the failure of the fire-affected member and the further damage of the surrounding members, changing the bridge stress mode and leading to serious damage or even collapse of the structure. Once the tanker and other vehicles catch fire, their temperature can quickly rise to more than 1000℃ and continue to burn for a long time; vehicle fire such as passenger cars and cars can also cause the durability of bridge suspension cables to be reduced. Therefore, it is of great practical significance to study how to prevent steel cables from being damaged by fire and improve the safety and durability of bridge operation and maintenance.

[0003] At present, there are few studies on the protection of bridge cables under fire at home and abroad, and the proposed schemes are limited, and the engineering application is still in its infancy. The existing ideas for cable fire protection mainly include two kinds: (1) installing a spraying device, installing a spraying device near the bridge cable to reduce the surrounding air temperature; (2) heat insulation, coating fire-retardant paint on the periphery of the cable, wrapping heat insulation materials such as rock wool, and avoiding heat transfer to the cable. However, the above ideas mainly draw lessons from building fire protection schemes, and the cooling effect of the spraying device under extremely strong fire such as tanker fire needs to be studied, and the weather resistance of fire-retardant paint in the wild environment is also difficult to guarantee, so the above schemes are difficult to meet the requirements of bridge fire protection. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art and disclose a fireproof protection and early warning monitoring system suitable for cable-stayed bridges.

[0005] Technical scheme:

[0006] A fireproof protection and early warning monitoring system suitable for cable-stayed bridges, comprising a fireproof protection system and a monitoring and early warning system.

[0007] The fireproof protection system comprises a fireproof protection system, a communication pipeline system and a connecting fitting;

[0008] The fireproof protection system is wrapped outside the cable to be protected to form a protective coat; the fireproof protection system is composed of a plurality of protection sleeve units, each protection sleeve unit is a hollow double-layer structure and is a closed cavity, water or other suitable fluid can be injected into the space surrounded by the inner and outer walls of the protection sleeve main body, each protection sleeve is connected with each other through the lower communication pipeline system, and the fluid can flow between different protection sleeve units.

[0009] The monitoring and early warning system can realize automatic monitoring and early warning of whether the bridge is on fire, monitoring and automatic adjustment of the system working state, and comprises local bridge monitoring equipment and local bridge warning equipment, and

[0010] The networking module and the background database are connected.

[0011] Each protection sleeve unit in the protection sleeve system is embedded with a single-chip microcomputer, a wireless communication module, a water level detector and a temperature detector, each protection sleeve unit is interconnected in a wireless mode and is in wireless communication with the local bridge monitoring equipment, a flow control valve is installed in the main communication pipeline at the middle position of any two protection sleeve units, and each detector is connected with the single-chip microcomputer.

[0012] Each protection sleeve unit and the local bridge monitoring equipment form a local network and are interconnected in a wireless mode.

[0013] The local bridge monitoring equipment is interconnected with the background database located in the cloud through the networking module.

[0014] The technical scheme of the present application is innovative in technical scheme, technical innovation and component design.

[0015] In the coping strategy, the application does not adopt the traditional idea of "fire extinguishing and fire fighting", but adopts the "effective flexible strategy" coping idea based on the fact that fire phenomenon will inevitably occur during the service period of the bridge in the probability theory. On the one hand, according to the research and scientific research analysis, the fire risk weak link of the cable-stayed bridge lies in the steel material structure of the bridge, and the flame temperature of the open space decreases with the increase of the height, and the steel member in the height range of 10-15m above the bridge will be damaged, according to which the effective height of the fire protection system of the application is consistent with the height of the cable to be protected of the cable-stayed bridge. On the other hand, in the technical innovation, the fire protection system of the application can ensure that the fatal structure member (i.e. the cable) of the cable-stayed bridge can always be below 100 degrees of safe temperature due to "wearing body armor". In detail: because of the overall system design of the communicating vessel, even if the protection sleeve unit is in an emergency state due to fire and the water level decreases, due to the existence of the system level communicating vessel, the water source can be adjusted in the system to ensure the benign safe state of continuous supply, and the system has strong risk resistance. In the component design innovation, due to the "independent" design of the multiple functional blocks of the protection sleeve unit, the whole system can achieve "no risk". Under this idea, due to the standardization of the components, it is also beneficial to the engineering implementation and popularization.

[0016] Compared with the prior art, the beneficial effects of the above technical scheme are:

[0017] (1) The physical properties of water can keep the temperature of the steel cable at a relatively low level.

[0018] (2) The water storage tank and the external water source can ensure that the system has sufficient water source, and fully utilizes the principle of communicating vessel to ensure that the water sources at different places can flow to each other and automatically flow to the required position.

[0019] (3) Good durability, less daily maintenance, and strong automatic working ability of the system.

[0020] (4) Flexible installation, and the shape is customized according to the specific bridge, which can well fit the steel cable of different bridges. According to the needs, protection sleeves can be installed for all cables, or sleeves can be installed for part of the cables according to the needs.

[0021] (5) It can realize automatic monitoring, early warning and system working state monitoring and automatic adjustment of whether the bridge has a fire. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Implementation schematic diagram of application scene of the application

[0023] Figure 2 Schematic diagram of column structure of protection sleeve unit

[0024] Figure 3Example 1 protective sleeve body (two pieces of independent function block design) profile details

[0025] Figure 4 Multi-piece combined protective sleeve body schematic diagram

[0026] Figure 5 Fire protection and communication system working diagram

[0027] Figure 6 Example water supply system working principle

[0028] Figure 7 The layout principle diagram of the monitoring and early warning system of the application

[0029] Figure 8 The monitoring and early warning system of the application

[0030] Figure 9 The circuit diagram of the monitoring and early warning system of the application

[0031] Reference signs:

[0032] Protective sleeve unit 1: protective sleeve body 1-1, air pressure adjusting device 1-2, high pressure exhaust valve 1-2-1, low pressure air supplement valve 1-2-2, rotating bearing 1-3;

[0033] Communication pipeline system 2: main communication pipeline 2-1, auxiliary communication pipeline 2-2, water supplement pipeline 2-3;

[0034] Connection fittings 3: fixed buckle 3-1;

[0035] Monitoring and early warning system 4: temperature detector 4-1, water level detector 4-2, flow control valve 4-3;

[0036] Main cable 5, sling 6; water 7, water storage pool 8, bridge control room 9. DETAILED DESCRIPTION

[0037] The technical solutions of the application will be further described below in combination with the drawings and examples.

[0038] Example 1

[0039] A fire protection and early warning monitoring system suitable for cable-stayed bridges, which comprises a fire protection system and a monitoring and early warning system. It is applied to cable-stayed bridges, cable-stayed bridges and tied arch bridges, etc. cable-stayed bridges; the cable of the cable-stayed bridge is taken as example 1, the special object to be protected is the cable (including the sling 6, the main cable 5), which is a component of the cable-stayed bridge.

[0040] The fire protection system comprises a protective sleeve system, a communication pipeline system 2 and a connection fitting 3, the communication pipeline system 2 comprises a plurality of flexible auxiliary communication pipelines 2-2, wherein:

[0041] The protection sleeve system is wrapped outside the cable to be protected to form a "protective coat"; the protection sleeve system is mainly composed of a plurality of protection sleeve units 1, the protection sleeve body 1-1 of each protection sleeve unit 1 is a hollow double-layer structure, the shape of which is different according to the height and inclination of the cable, each protection sleeve unit 1 is directly connected to the communication pipeline 2 through the auxiliary communication pipeline 2-2, or is indirectly connected to the communication pipeline system 2 after being communicated with other protection sleeve units 1 through the auxiliary communication pipeline 2-2; at the same time, the protection sleeve unit 1 is matched with the air pressure adjusting device 1-2, the air pressure adjusting device 1-2 includes a high-pressure exhaust valve 1-2-1 and a low-pressure air supplement valve 1-2-2.

[0042] As an example, by way of illustration but not limitation, each protection sleeve unit can be divided into multiple combined forms according to the actual shape of the cable and engineering needs (the protection sleeve unit is enclosed by multiple independent functional blocks), each of which is equipped with an auxiliary communication pipeline 2-2 and / or a set of air pressure adjusting devices 1-2 and connecting accessories 3, and the detailed structure is shown in Figure 2 、 Figure 3 .

[0043] As an example, the protection sleeve unit (independent functional block) is a hollow double-layer structure, which is a sealed cavity, and water 7 or other suitable fluid medium can be injected into the space surrounded by the inner and outer walls of the protection sleeve body 1-1. Figure 1As shown, each protective sleeve unit is connected to each other through the lower communication pipe 2-2, and fluid can flow between different protective sleeve units. Specifically, the protective sleeve body 1-1 for wrapping the sling in the A zone is directly connected to the main communication pipe 2-1 through the lower flexible auxiliary communication pipe 2-2, the bottom of the protective sleeve body 1-1 for wrapping the sling in the B zone is directly connected to the main communication pipe 2-1 through the flexible auxiliary communication pipe 2-2, and the top of the protective sleeve body 1-1 for wrapping the main cable is connected through the auxiliary communication pipe 2-2. The protective sleeve unit is made of a material with good thermal conductivity and durability, such as stainless steel (good thermal conductivity and durability refer to: thermal conductivity coefficient is 5 W / (m·℃) or more, and can withstand the erosion of natural environment in the field without fire). The top of the protective sleeve unit is provided with a high-pressure exhaust valve 1-2-1 and a low-pressure air supplement valve 1-2-2. Specifically, the top of the protective sleeve body 1-1 for wrapping the sling in the A zone and the top of the protective sleeve body 1-1 for wrapping the main cable in the B zone are respectively provided with a high-pressure exhaust valve 1-2-1 and a low-pressure air supplement valve 1-2-2. When the local air pressure rises due to heating, the high-pressure exhaust valve 1-2-1 is triggered to open and release air, preventing the pressure in the sleeve from accumulating too high and causing instability, and when the air pressure in the cavity decreases due to liquid consumption, the low-pressure air supplement valve 1-2-2 is triggered to open; its working principle is: when a local fire occurs, the protective sleeve temperature rises, the internal water vaporizes into water vapor to absorb heat and is discharged from the high-pressure exhaust valve 1-2-1 of the air pressure regulating device 1-2, while the lower part continuously supplements water source, and the physical properties of water are used to control the temperature of the protective sleeve and the sling 6 at a relatively low level. The setting height of the protective sleeve system can still be determined according to the bridge fire situation and the fire protection requirements.

[0044] The connecting fitting 3 comprises a fixing buckle 3-1; the "protective clothing" installs and attaches each protective sleeve body 1-1 on the cable through the fixing buckle 3-1.In A area, the protective sleeve body 1-1 for wrapping the sling is directly connected to the main communicating pipe 2-1 through the lower flexible auxiliary communicating pipe 2-2, in B area, the bottom of the protective sleeve body 1-1 for wrapping the sling is directly connected to the main communicating pipe 2-1 through the flexible auxiliary communicating pipe 2-2, and the top of the protective sleeve body 1-1 for wrapping the main cable is connected through the auxiliary communicating pipe 2-2, so that the whole system becomes a communicating vessel, ensuring the smooth flow of liquid between different protective sleeve units and the safety and synergy of the fire protection system.The working principle of the whole communicating vessel is as follows: in combination with the air pressure regulating device 1-2 in the protective sleeve system, each protective sleeve body 1-1 is connected with the water storage pool 8 to form a communicating vessel, when a local fire occurs, the water in the sleeve around the fire vaporizes and decreases, and the water in the remaining sleeves quickly flows into the fire sleeve through the communicating system, so that the water level in the fire sleeve is always maintained at a safe height.The communicating system can connect water sources at different places into a whole that can flow freely, and the working principle of the fire protection and communicating system is as shown in Figure 5

[0045] Figure 4 As an example, the protective sleeve unit is formed by four, three or two independent functional blocks enclosed by a rotating bearing 1-3, and in order to independently enter the communicating vessel, each functional block needs to be considered with the auxiliary communicating pipe 2-2 and / or the air pressure regulating device.

[0046] The protective sleeve unit 1 formed by the independent functional blocks is sleeved on the protected object sling 6 / main cable 5, and each independent functional block is connected to the communicating pipe system 2, i.e., the communicating vessel, through the auxiliary communicating pipe 2-2.In long-term daily operation, even if a certain independent function fails, the protected object sling / main cable at the place is still within the safe temperature range of 100 degrees or less when a fire occurs.Therefore, the safety factor of the technical scheme of the present application is extremely high.

[0047] The monitoring and early warning system, as shown in Figure 7 、 Figure 8 、 Figure 9 , can realize automatic monitoring, early warning and system working state monitoring and automatic adjustment of whether a fire occurs on the bridge.

[0048] The monitoring and early warning system comprises a local bridge monitoring device and a local bridge warning device, and

[0049] a networking module and a background database;

[0050] ​Each protective sleeve unit 1 in the protective sleeve system embeds a microcontroller, a wireless communication module, a water level detector, and a temperature detector. The protective sleeve units 1 are interconnected wirelessly and communicate wirelessly with the local bridge monitoring equipment. A flow control valve is installed in the main connecting pipe at the midpoint between any two protective sleeves. Figure 7 Each detector is connected to the microcontroller;

[0051] Each protective sleeve unit 1 and the local bridge inspection equipment form a local network and are interconnected wirelessly;

[0052] The local bridge inspection equipment is interconnected with a cloud-based backend database via a networking module; as an example and not a limitation, the local bridge inspection equipment is located in the bridge control room 9;

[0053] The control and management monitoring software runs on the local bridge monitoring equipment and includes the ID information of each sleeve of the bridge.

[0054] The local bridge monitoring equipment polls each protective sleeve unit 1 in all protective sleeve systems registered with the local bridge monitoring equipment. If a protective sleeve unit 1 loses connection in the local network, the local bridge monitoring equipment connects with the owner company and the fire and rescue system through the network module to send an early warning information.

[0055] Sounding circuits are installed at both ends of the bridge and connected to the local network, thus connecting to the network module to form a local bridge warning device; electronic valves are installed at the interface of the backup water supply pipeline and the interface of the water storage tank, which are connected to the local bridge monitoring equipment. The valve opening and closing status is automatically adjusted under the control software of the local bridge monitoring equipment according to the signal of the detection equipment, so as to realize different working modes of the water storage tank and the water supply pipeline.

[0056] The water level detector and temperature detector are applied to the protective sleeve body 1-1, and the warning thresholds are set for height H and temperature T, respectively.

[0057] When the temperature detector in the protective sleeve unit 1 detects that the temperature reaches the threshold T, it is determined to be a high temperature fire. The microcontroller reports the sleeve number ID to the local bridge monitoring equipment. The local bridge monitoring equipment in the local network obtains the accurate geographical location corresponding to the sleeve number ID from the background database through the network module, and sends an early warning to the owner and the fire and rescue system. The owner and the fire and rescue system verify the on-site situation through remote monitoring and respond quickly.

[0058] When the water level detector detects that the water level inside the protective sleeve is too low and reaches the threshold H, it determines that the water volume in the reservoir is insufficient. The microcontroller triggers a signal to the local bridge monitoring equipment and sends an early warning to the owner company. At the same time, the backup water source electronic valve is automatically opened to replenish water under the control software of the local bridge monitoring equipment.

[0059] The flow control valve is arranged in the middle of each sleeve body on the main communication pipeline 2-1, and is used for monitoring and controlling the water flow condition of the main communication pipeline; the flow control valve can monitor the water flow condition in the main communication pipeline in real time and send monitoring information to the bridge detection device, and the local bridge monitoring device calculates the flow and direction according to the data of each detector; if the temperature data is normal, and the local bridge monitoring device monitors that the water flow keeps flowing to the same protection sleeve direction for a period of time, it is judged that the local protection sleeve is damaged, and the damage warning information and the IP information in the background database are sent to the owner unit.

[0060] The monitoring and early warning system is composed as shown in Figure 8 .

[0061] The circuit diagram of the monitoring and early warning system is shown in Figure 9 . Among them, the temperature detector circuit, the water level detector circuit and the flow control valve circuit adopt the existing conventional circuit.

[0062] In the local network, each protection sleeve unit is wirelessly connected to the local bridge monitoring device through a wireless communication module, and each protection sleeve unit 1 is interconnected in a wireless manner. Here, the wireless connection mode is exemplified but not limited, and can adopt a 4G / 5G module, WIFI, Bluetooth and the like.

[0063] The local bridge monitoring device collects various monitoring data of each protection sleeve unit 1 in the local network and runs control and management monitoring software algorithms, and then connects to the background through a networking module.

[0064] As an example, the networking module is connected to the background database. For example, but not limited to, the networking module can be connected to the cloud in a wireless and / or wired manner.

[0065] Figure 6 The water supply system shown in

[0066] Once a fire occurs, as shown in Figure 5 : when a local fire occurs, the water in the sleeve around the fire vaporizes and decreases, and the remaining water in the sleeve rapidly replenishes the fire sleeve through the communication system, so that the water level in the fire sleeve is always maintained at a safe height. The communication system can connect various water sources into an integral whole that can flow freely, and the working principle of the fireproof protection and communication system is as shown in Figure 5The scheme can play a role in protecting the structure of the sling and the main cable to prevent the sling and the main cable from strength damage in response to serious bridge fires such as tanker fires, and can avoid the anticorrosive layer on the surface of the steel cable from falling off in relatively weak fires caused by ordinary cars, so as to not damage the durability of the sling. The scheme can avoid the strength damage and durability loss of the steel cable caused by the fire and avoid the serious economic loss of bridge maintenance after the fire.

[0067] The above description is only a description of the preferred embodiments of the present application, and is not any limitation on the scope of the present application. Any modification or modification made by any person skilled in the art according to the above disclosed technical content should be regarded as an equivalent effective embodiment, and belongs to the protection scope of the technical scheme of the present application.

Claims

1. A fire protection and early warning monitoring system suitable for cable-stayed bridges, characterized in that, This includes fire protection systems and monitoring and early warning systems; The fire protection system includes a protective sleeve system, connecting pipes, and connecting fittings; wherein, the protective sleeve system covers the outside of the cable to be protected, forming a "protective outer garment"; the protective sleeve system is composed of numerous protective sleeve units, each of which has a hollow double-layer structure and is a sealed cavity. Water or other suitable fluids are injected into the space enclosed by the inner and outer walls of the protective sleeve body, and each protective sleeve is interconnected through the connecting pipe at the bottom, allowing the fluid to flow between different protective sleeves; The protective sleeve unit is composed of one or more independent functional blocks, each with a hollow double-layer structure, and each works independently. Each protective sleeve unit is divided into multiple blocks according to the actual shape of the cable and engineering needs, and each is equipped with an air pressure regulating device and connecting accessories. The top of the protective sleeve unit is directly or indirectly equipped with a high-pressure exhaust valve and a low-pressure air supply valve. When the local heating pressure rises, the high-pressure exhaust valve is triggered to open and release air, preventing the internal pressure of the sleeve from accumulating too high and causing instability. When the internal pressure drops due to liquid consumption and becomes unstable, the low-pressure air supply valve is triggered to open. In the event of a local fire, the temperature of the protective sleeve rises due to heating, and the internal moisture vaporizes into water vapor, absorbing heat and being discharged from the air pressure regulating device. At the same time, water is continuously supplied from the bottom, using the physical properties of water to keep the temperature of the protective sleeve and the sling at a relatively low level.

2. The system as described in claim 1, characterized in that, The connecting fitting (3) includes a fixing buckle (3-1); the "protective outer garment" installs and attaches each protective sleeve body (1-1) to the cable through the fixing buckle (3-1); the protective sleeve body (1-1) used to wrap the sling in area A is directly connected to the main connecting pipe (2-1) via the lower flexible auxiliary connecting pipe (2-2); the bottom of the protective sleeve body (1-1) used to wrap the sling in area B is directly connected to the main connecting pipe (2-1) via the flexible auxiliary connecting pipe (2-2), while its top is connected to the wrapping section via the auxiliary connecting pipe (2-2). The main body of the protective sleeve of the main cable (1-1) thus transforms the entire system into a communicating vessel, ensuring the smooth flow of liquid between different protective sleeves and guaranteeing the safety and synergy of the fire protection system; combined with the air pressure regulating device in the protection system, each protective sleeve is connected to the water storage tank as a communicating vessel. When a local fire occurs, the water in the sleeves around the fire vaporizes and decreases, and the water in the other sleeves is quickly replenished into the sleeve under fire through the communicating system, keeping the water level in the sleeve under fire at a safe height; the communicating system can connect water sources in various places into a freely flowing whole.

3. The system as described in claim 1, characterized in that, It also includes a water supply system that connects to a pipeline, and the water supply system is equipped with a water storage tank or connects to local rivers, lakes, reservoirs and other natural water sources.

4. The system as described in claim 1, characterized in that, The monitoring and early warning system can automatically monitor and warn of whether a fire has occurred on the bridge, as well as monitor and automatically adjust the system's working status. It includes local bridge monitoring equipment and local bridge warning equipment, as well as a network module and a background database. Each protective sleeve unit (1) in the protective sleeve system is embedded with a microcontroller, a wireless communication module, a water level detector (4-2) and a temperature detector (4-1). The protective sleeve units are interconnected wirelessly and communicate wirelessly with the local bridge monitoring equipment. A flow control valve (4-3) is installed in the main connecting pipe at the middle position of any two protective sleeves. Each detector is connected to the microcontroller. Each protective sleeve unit and local bridge inspection equipment forms a local network and is interconnected wirelessly. The local bridge inspection equipment is interconnected with a cloud-based backend database via a networking module.

5. The system as described in claim 4, characterized in that, The control and management monitoring software runs on the local bridge monitoring equipment and includes the ID information of each sleeve of the bridge. The local bridge monitoring equipment polls each protective sleeve unit (1) in all protective sleeve systems registered with the local bridge monitoring equipment. If a protective sleeve unit (1) loses connection in the local network, the local bridge monitoring equipment connects with the owner company and the fire and rescue system through the network module and sends an early warning message. Sounding circuits are installed at both ends of the bridge and connected to the local network, thus connecting to the network module to form a local bridge warning device; electronic valves are installed at the interface of the backup water supply pipeline and the interface of the water storage tank, which are connected to the local bridge monitoring equipment. The valve opening and closing status is automatically adjusted under the control software of the local bridge monitoring equipment according to the signal of the detection equipment, so as to realize different working modes of the water storage tank and the water supply pipeline.

6. The system as described in claim 5, characterized in that, The water level detector and temperature detector are applied to the protective sleeve body (1-1), and the warning thresholds are set for height H and temperature T, respectively; When the temperature detector in the protective sleeve unit 1 detects that the temperature reaches the threshold T, it is determined to be a high temperature fire. The microcontroller reports the ID to the local bridge monitoring equipment. The local bridge monitoring equipment in the local network obtains the accurate geographical location corresponding to the sleeve number ID from the background database through the network module, and sends an early warning to the owner and the fire and rescue system. The owner and the fire and rescue system verify the on-site situation through remote monitoring and respond quickly. When the water level detector detects that the water level inside the protective sleeve is too low and reaches the threshold H, it determines that the water volume in the reservoir is insufficient. The microcontroller triggers a signal to the local bridge monitoring equipment and sends an early warning to the owner company. At the same time, the backup water source electronic valve is automatically opened to replenish water under the control software of the local bridge monitoring equipment. The flow control valve is used on the main connecting pipe (2-1) and is arranged in the middle of each sleeve body to monitor and control the water flow in the main connecting pipe. The flow control valve can monitor the water flow in the main connecting pipe in real time and send the monitoring information to the bridge detection equipment. The local bridge monitoring equipment calculates the flow rate and direction based on the data from each detector. If the temperature data is normal, but the local bridge monitoring equipment detects that the water flow continues to flow towards the same protective sleeve for a period of time, it is determined that the protective sleeve is partially damaged. At the same time, the damage warning information and the IP information in the background database are sent to the owner.

7. The system as described in claim 1, characterized in that, It is used in cable-stayed bridges, such as suspension bridges, cable-stayed bridges, and tied-arch bridges; and to protect cable structure components.

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