Bridge high tower beam intelligent anti-icing ridge system and method

Abstract

A smart anti-icing system and method for bridge tower crossbeams is disclosed. The system includes multiple sets of steel plate de-icing tanks; studs are arrayed and fixed on the bottom surface of the steel plate de-icing tanks, and multiple sets of electric heat tracing components are laid on them; a bottom temperature sensor and a bottom water volume sensor are installed under the electric heat tracing components; the electric heat tracing components are electrically connected to a signal output module in an intelligent control cabinet; the bottom temperature sensor, the bottom water volume sensor, and a base temperature sensor installed on the bridge tower crossbeam are electrically connected to a signal receiving module and a display module in the intelligent control cabinet; a heat-conducting mesh is laid above the electric heat tracing components; a steel pressure plate with studs inserted is pressed on the heat-conducting mesh; an insulation layer is provided on the bottom surface of the steel plate de-icing tanks; and end drainage pools, either closed or open at the top, are provided at both ends of the steel plate de-icing tanks. This invention also discloses a smart anti-icing method for bridge tower crossbeams. The system of this invention is highly implementable, economical, intelligent, and durable. The method of this invention features multi-index intelligent control, low energy consumption, and is suitable for widespread application.

Description

Technical Field

[0001] This invention relates to an intelligent anti-icing system and method, specifically to an intelligent anti-icing system and method for the crossbeams of bridge towers. Background Technology

[0002] With the rapid advancement of my country's transportation infrastructure construction, bridge engineering technology has achieved leapfrog breakthroughs. Long-span, high-pier, high-tower bridges have become core transportation hubs spanning rivers, lakes, seas, and deep mountain valleys. The main tower height of cable-stayed bridges and suspension bridges has generally exceeded 100 meters, with some mountainous areas and bridges spanning rivers even exceeding 200 meters. Simultaneously, spans have increased to the kilometer level, greatly enhancing the traffic capacity of the road network. Social development has been accompanied by a continuous surge in traffic volume, with the daily traffic volume on backbone bridges often exceeding 50,000 vehicles, and exceeding 100,000 vehicles during peak hours. As a critical stress-bearing node of the tower columns, the crossbeams of high towers are prone to forming icicles in low-temperature rain and snow. These icicles can fall and directly damage vehicles on the bridge deck, guardrails, and ancillary facilities, triggering chain-reaction traffic accidents. Furthermore, the additional ice load can also cause structural damage such as excessive stress in the crossbeams and concrete freeze-thaw spalling, placing immense safety pressure on operation and management. Preventing icicle disasters has become an urgent task to ensure the safe operation of bridges.

[0003] The current situation regarding icicle prevention on bridge towers and crossbeams is extremely serious. Many existing bridges have inherent design flaws. Due to limitations in climate understanding and design standards at the time, extreme icing risks were generally not considered, and specialized icicle prevention and removal devices were not installed. These bridges account for over 40% of all bridges. Their crossbeams mostly use traditional concrete or steel structures without optimized designs such as drainage and heating. Under severe weather conditions such as freezing rain and high humidity / low temperatures, icicles form quickly and adhere strongly. In recent years, extreme weather events have become more frequent, and the impact of cold waves, freezing rain, and other disastrous weather events has expanded, further exacerbating the icicle risk on existing bridges. Relying solely on temporary emergency measures is insufficient to meet the needs of routine prevention and control, and structural and operational safety hazards are becoming increasingly prominent.

[0004] More significantly, existing methods for preventing and removing icicles have obvious limitations and are difficult to adapt to the complex working conditions of high-pier and high-tower bridges. Mechanical de-icing relies on aerial work platforms or maintenance baskets, which are greatly affected by strong winds and low temperatures, resulting in low operational efficiency and high safety risks. In addition, existing monitoring methods mostly rely on manual inspections combined with simple sensors, making it difficult to obtain key data such as ice thickness and distribution in real time. This leads to insufficient targeting of de-icing operations and makes it difficult to meet the needs of efficient, safe, and environmentally friendly icicle prevention for long-span, high-pier and high-tower bridges.

[0005] CN107338724A discloses a multi-directional displacement bridge expansion joint device for ice melting and drainage. It is an expansion joint device that adds ice melting and drainage. However, the structural design is limited to a multi-directional displacement bridge expansion joint and is a closed space heating unit. It is simple in form, has potential durability problems, and has defects in the selection and arrangement of control sensors.

[0006] CN212452256U discloses an ice-melting device for bridge icicles, which is an ice-melting device for icicles on both sides of ordinary bridges. However, it lacks an intelligent control system and has high implementation costs, low heating wire efficiency, and poor durability for ordinary bridges.

[0007] CN213625055U discloses an anti-icing municipal bridge deck, which is a technology for preventing icing of municipal road bridge decks. However, the use of this technology on ordinary bridges is costly, complex to operate, and energy-intensive, making it extremely difficult to promote it on a large scale.

[0008] In summary, there is an urgent need to find a bridge tower beam intelligent anti-icing system that is highly feasible, economical, intelligent, and durable, as well as a bridge tower beam intelligent anti-icing method with multi-index intelligent control, low energy consumption, and suitable for widespread application. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide an intelligent anti-icing system for bridge tower beams that is highly feasible, economical, intelligent and durable.

[0010] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a smart anti-icing method for bridge tower beams with multi-index intelligent control, low energy consumption, and suitable for promotion.

[0011] The technical solution adopted by this invention to solve its technical problem is as follows: A smart anti-icing system for bridge tower beams includes multiple sets of steel plate de-icing tanks; the bottom surface of the steel plate de-icing tanks is fixedly arranged with studs and multiple sets of electric heat tracing components are laid on it; a bottom temperature sensor and a bottom water volume sensor are provided under the electric heat tracing components; the electric heat tracing components are electrically connected to the signal output module in the intelligent control cabinet; the bottom temperature sensor, the bottom water volume sensor, and the base temperature sensor installed on the bridge tower beam are electrically connected to the signal receiving module and the display module in the intelligent control cabinet; a heat-conducting mesh is laid on top of the electric heat tracing components; a steel pressure plate with studs inserted is pressed on the heat-conducting mesh; an insulation layer is provided on the bottom surface of the steel plate de-icing tanks; and end drainage pools with closed or open ends are provided at both ends of the steel plate de-icing tanks. The bottom temperature sensor collects the temperature of the electric heating component and sends a stop signal when the temperature exceeds the preset temperature; the bottom water volume sensor collects the water and snow accumulation in the tank and sends a start signal; the substrate temperature sensor collects substrate temperature data and sends a start signal when the set temperature range is reached.

[0012] The installation and operation process of the intelligent anti-icing system for bridge tower beams of the present invention is as follows:

[0013] First, studs are arrayed and fixed on the bottom surface of the steel plate ice melting tank, and an insulation layer is installed on the bottom surface. Then, one side of the steel plate ice melting tank is installed on the lower part of the side of the bridge tower beam. Multiple sets of electric heat tracing components are laid between the studs on the bottom surface of the steel plate ice melting tank. Then, the bottom temperature sensor and bottom water volume sensor are installed under the electric heat tracing components. After laying the heat-conducting mesh, the steel pressure plate is inserted into the studs and presses down the electric heat tracing components. The bolts are tightened. After installing closed end drainage pools at both ends of the steel plate ice melting tank, the electric heat tracing components are electrically connected to the signal output module in the intelligent control cabinet. The bottom temperature sensor, bottom water volume sensor, and the base temperature sensor installed on the bridge tower beam are electrically connected to the signal receiving module and display module in the intelligent control cabinet. The installation is complete.

[0014] The base temperature sensor, the bottom temperature sensor, and the bottom water volume sensor installed on the crossbeam of the bridge tower are activated, and the real-time temperature and water volume are displayed on the display module.

[0015] When the signal receiving module in the intelligent control cabinet receives a temperature of ≤5℃ from the base temperature sensor and the signal of the bottom water volume sensor is saturated, it indicates that there is water or snow accumulation in the steel plate de-icing tank, which poses a risk of freezing or has already frozen. Depending on the temperature range, the signal output module in the intelligent control cabinet will start the preheating, intermittent energy-saving, or full-speed de-icing mode, and the melted precipitation will be accumulated and discharged into the end drainage pool.

[0016] When the signal receiving module in the intelligent control cabinet receives a signal indicating that the bottom temperature sensor exceeds the preset temperature, the bottom water volume sensor signal is not saturated, or the substrate temperature sensor temperature is greater than 5°C, the signal output module in the intelligent control cabinet immediately disconnects the electric heating component from the power supply and stops heating.

[0017] Preferably, the bottom temperature sensor and the substrate temperature sensor are Pt100.

[0018] Preferably, the lower end of the stud is fixed by welding, with a group of studs welded at 0.5m intervals, and two studs in each group.

[0019] Preferably, the cross-section of the steel plate ice-melting trough is a U-shaped trough with a short side on one side. A U-shaped trough with a short side on one side can prevent excessive water or snow accumulation, thus avoiding increased weight and processing difficulty.

[0020] Preferably, a steel plate tie rod is provided between the inner sides of the two sides of the single-sided short-side U-shaped groove. The steel plate tie rod can increase the stability of the steel plate ice melting groove.

[0021] Preferably, the long side of the single-sided short-side U-shaped groove is fixed to the bridge tower crossbeam by a high-strength anchor bolt passing through the protective pad. The high-strength anchor bolt is driven into the concrete of the crossbeam to fix the steel plate ice-melting groove.

[0022] Preferably, the electric heat tracing assembly is a main / backup armored heat tracing cable laid in a loop.

[0023] Preferably, the electric heat tracing assembly is connected to the signal output module of the intelligent control cabinet via a relay. The signal output module controls the relay to engage or disengage, thereby starting or stopping the heating of the electric heat tracing assembly.

[0024] Preferably, the heat-conducting mesh is made of stainless steel. The heat-conducting mesh is made of 304 stainless steel with a mesh size of 30mm × 30mm, and the diameter of the steel wires is not less than 1.5mm. The heat-conducting mesh can fix the electric heat tracing assembly and ensure uniform heating.

[0025] Preferably, an insulated steel cover plate is provided outside the insulation layer. The insulated steel cover plate can protect the insulation layer, provide support, and isolate the external environment, resulting in high utilization of electrical and thermal energy and preventing ice formation inside the tank.

[0026] Preferably, the end drainage pool has drainage holes at its bottom. An electric heating assembly is laid on the bottom surface of the end drainage pool, with the same configuration as the steel plate de-icing trough. The end drainage pool allows for the orderly drainage of melted freezing rain, snow, and other precipitation collected in the de-icing trough.

[0027] Preferably, the intelligent control cabinet is equipped with a junction box. The wiring method adopts a 220V parallel connection, and the junction box is IP65 rated, with one input and four outputs.

[0028] Preferably, the intelligent control cabinet is equipped with two power supplies, and all external components are electrically connected to them via a junction box. Photovoltaic power can be selected as the backup power source.

[0029] Preferably, a current transformer is provided between the circuits of the multiple sets of electric heat tracing assemblies and the power supply. The current transformer can ensure automatic switching to the backup circuit in the event of a failure in the main circuit of the electric heat tracing assembly.

[0030] Preferably, the display module inside the intelligent control cabinet is also connected to a camera. The camera can be installed on the bridge tower beam above the steel plate melting tank and on the intelligent control cabinet to monitor the melting process of the steel plate melting tank and the operation of the intelligent control cabinet by the staff via video.

[0031] Preferably, the display module is also connected to a remote output terminal and an alarm module. The remote output terminal of the display module can transmit relevant data from the display module to the staff's mobile phone or computer via the Internet. At the same time, when the displayed data exceeds a set threshold, an alarm signal will be sent to the staff through the alarm module.

[0032] Preferably, all electrical control and signal cables are equipped with conduits. The signal cables between the temperature sensor, the bottom water volume sensor, the substrate temperature sensor, the signal receiving module, the display module, and the signal output module, as well as with external components, all use 3-core signal cables.

[0033] Preferably, all signal transmissions are controlled by PLC programming.

[0034] The technical solution adopted by the present invention to further solve its technical problem is as follows: A method for intelligent anti-icing of bridge tower beams, firstly, a steel plate de-icing tank is fixed on one side of the bridge tower beam that is prone to icing, and then the base temperature sensor, the tank bottom temperature sensor, and the tank bottom water volume sensor installed on the bridge tower beam are activated, and the real-time temperature and water volume are displayed on the display module.

[0035] When the signal receiving module in the intelligent control cabinet receives a temperature of 2-5℃ from the base temperature sensor and the signal of the bottom water volume sensor is saturated, it indicates that there is water or snow accumulation in the steel plate de-icing tank. The signal output module in the intelligent control cabinet then activates the preheating mode of the electric heat tracing component.

[0036] When the signal receiving module in the intelligent control cabinet receives a temperature of 0-2℃ from the base temperature sensor and the signal of the bottom water volume sensor is saturated, it indicates that the water or snow in the steel plate de-icing tank is at risk of freezing. The signal output module in the intelligent control cabinet then starts the intermittent operation energy-saving mode of the electric heat tracing component.

[0037] When the signal receiving module in the intelligent control cabinet receives a temperature of ≤0℃ from the base temperature sensor and the signal from the bottom water volume sensor is saturated, it indicates that the steel plate ice melting tank has frozen, and the signal output module in the intelligent control cabinet starts the full-speed ice melting mode.

[0038] Melted precipitation accumulates and is discharged into the end drainage ponds;

[0039] When the signal receiving module in the intelligent control cabinet receives a signal indicating that the bottom temperature sensor exceeds the preset temperature, the bottom water volume sensor signal is not saturated, or the substrate temperature sensor temperature is greater than 5°C, the signal output module in the intelligent control cabinet immediately disconnects the electric heating component from the power supply and stops heating.

[0040] The preheating mode, intermittent energy-saving mode, and full-speed ice-melting mode can be achieved by gradually increasing the temperature of the electric heat tracing component by increasing the current, while the intermittent energy-saving mode can be achieved by switching the current on and off.

[0041] The beneficial effects of the intelligent anti-icing system and method for bridge tower crossbeams of the present invention are as follows:

[0042] (1) The intelligent anti-icing system for bridge tower beams of the present invention is used to prevent freezing rain or falling snow formed in extreme and harsh environments from condensing into ice ridges at the lower edge of the tower beams, so as to ensure that the appearance and surface quality of the tower beams are not affected by ice ridges, and at the same time eliminate the risk of major public safety accidents caused by falling ice from high altitudes, and effectively protect the safety of people's lives and property; the system is designed for open spaces, has high feasibility of anti-icing, and is economical. The use of multiple sets of armored heat tracing wires and multi-index intelligent control effectively solves the problems of durability and intelligence;

[0043] (2) The intelligent anti-icing method for bridge tower beams of the present invention adopts multi-sensor information fusion perception technology, which can accurately judge the icing conditions and realize the automatic switching of multiple working modes such as "preheating" (starting before icing), "intermittent operation" (energy-saving mode) and "full melting of ice", achieving the best balance between safety and energy saving, with low energy consumption, and is suitable for promotion. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall installation structure of Embodiment 1 of the intelligent anti-icing system for bridge tower beams of the present invention;

[0045] Figure 2 This is a schematic diagram of the cross-sectional structure of Embodiment 1 of the intelligent anti-icing system for bridge tower beams of the present invention;

[0046] Figure 3 This is a top view of Embodiment 1 of the intelligent anti-icing system for bridge tower beams of the present invention (without electric heat tracing components).

[0047] Figure 4yes Figure 1 Enlarged structural diagram of the longitudinal section of the steel plate ice-melting tank at point B;

[0048] Figure 5 This is a schematic diagram of the structure of the electric heat tracing component after installation in Embodiment 1 of the intelligent anti-icing system for bridge tower beams of the present invention;

[0049] Figure 6 This is a schematic diagram of the intelligent control cabinet and related components in Embodiment 1 of the intelligent anti-icing system for bridge tower beams of the present invention (the electrical connection between the junction box and other components is omitted).

[0050] Figure 7 yes Figure 1 Enlarged structural diagram of the drainage pool at point A in the middle;

[0051] Figure 8 yes Figure 7 A top view of the drainage pool at the middle section;

[0052] The attached figures are labeled as follows:

[0053] 1. Steel plate ice melting tank; 1-1. Stud; 1-2. Heat-conducting mesh; 1-3. Steel pressure plate; 1-4. Insulation layer; 1-5. Steel plate tie rod; 1-6. High-strength anchor bolt; 1-7. Protective pad; 1-8. Insulated steel cover plate; 2. Electric heat tracing assembly; 2-1. Tank bottom temperature sensor; 2-2. Tank bottom water volume sensor; 3. Intelligent control cabinet; 3-1. Signal receiving module; 3-2. Display module; 3-3. Signal output module; 3-4. Substrate temperature sensor; 3-5. Relay; 3-6. Junction box; 3-7. Power supply; 3-8. Current transformer; 4. End drainage tank; 4-1. Drainage hole; 5. Camera; 6. Remote output terminal; 7. Alarm module. Detailed Implementation

[0054] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0055] Example 1 of an intelligent anti-icing system for bridge tower beams

[0056] like Figures 1-8As shown, the intelligent anti-icing system for the bridge tower beam includes 12 sets of steel plate de-icing tanks 1; studs 1-1 are fixedly arranged in an array on the bottom surface of each steel plate de-icing tank 1, and 4 sets of electric heat tracing components 2 are laid on the bottom surface of each set of steel plate de-icing tanks 1; 4 sets of tank bottom temperature sensors 2-1 and 4 sets of tank bottom water volume sensors 2-2 are installed under each electric heat tracing component 2; the electric heat tracing component 2 is electrically connected to the signal output module 3-3 in the intelligent control cabinet 3; the tank bottom temperature sensor 2... -1. The bottom water volume sensor 2-2 and the base temperature sensor 3-4 installed on the crossbeam of the bridge tower are electrically connected to the signal receiving module 3-1 and the display module 3-2 in the intelligent control cabinet 3; a heat-conducting net 1-2 is laid on top of the electric heat tracing assembly 2; a steel pressure plate 1-3 with a stud 1-1 inserted on the heat-conducting net 1-2; an insulation layer 1-4 is provided on the bottom surface of the steel plate ice melting tank 1; and end drainage pools 4 with openings at the top are provided at both ends of the steel plate ice melting tank 1.

[0057] Among them, the bottom temperature sensor 2-1 and the substrate temperature sensor 3-4 are Pt100; the lower end of the stud 1-1 is fixed by welding, and a group of studs 1-1 is welded at 0.5m intervals, with 2 studs 1-1 in each group.

[0058] The steel plate ice melting trough 1 has a cross-section of a single-sided short-side U-shaped trough; steel plate tie rods 1-5 are provided between the inner sides of the two sides of the single-sided short-side U-shaped trough; the long side of the single-sided short-side U-shaped trough is fixed to the crossbeam of the bridge tower by high-strength anchor bolts 1-6 passing through the protective pad 1-7.

[0059] The electric heat tracing assembly 2 consists of a main / backup armored heat tracing cable laid in a loop, with one set being the main armored heat tracing cable and the other set being the backup armored heat tracing cable. The electric heat tracing assembly 2 is connected to the signal output module 3-3 of the intelligent control cabinet 3 via a relay 3-5.

[0060] The heat-conducting mesh 1-2 is made of stainless steel; the heat-conducting mesh 1-2 uses 304 stainless steel mesh with a mesh size of 30mm×30mm and a wire diameter of 2.0mm; the insulation layer 1-4 is covered with an insulation steel cover plate 1-8; the end drainage pool 4 is provided with a drainage hole 4-1 at the bottom; the bottom surface of the end drainage pool 4 is covered with an electric heat tracing component 2, and the related settings are the same as those of the steel plate ice melting tank 1.

[0061] The intelligent control cabinet 3 is equipped with junction boxes 3-6. The wiring method is 220V parallel connection. Junction boxes 3-6 are IP65 rated, with one input and four outputs. Each group of electric heat tracing components 2 is equipped with two junction boxes 3-6, and one junction box 3-6 for each main / backup armored heat tracing cable. The intelligent control cabinet 3 has two power supplies 3-7, with photovoltaic power selected as the backup. All external components are electrically connected to these power supplies through junction boxes 3-6. Current transformers are installed between the four groups of electric heat tracing components 2 and the power supply 3-7 circuits. Device 3-8; The display module 3-2 inside the intelligent control cabinet 3 is also connected to the camera 5; The display module 3-2 is also connected to the remote output terminal 6 and the alarm module 7; All electrical control and signal cables are equipped with conduits; The signal cables between the bottom temperature sensor 2-1, the bottom water volume sensor 2-2, and the substrate temperature sensor 3-4, as well as between the signal receiving module 3-1, the display module 3-2, and the signal output module 3-3 and external components, all use 3-core signal cables; All signal transmissions are controlled by PLC programming.

[0062] The installation and operation process of the intelligent anti-icing system for bridge tower beams of the present invention is as follows:

[0063] First, studs 1-1 are arrayed and fixed on the bottom surface of the steel plate ice melting tank 1, and insulation layer 1-4 is installed on the bottom surface. Then, one side of the steel plate ice melting tank 1 is installed on the lower part of the side of the bridge tower beam. Four sets of electric heat tracing components 2 are laid between the studs 1-1 on the bottom surface of the steel plate ice melting tank 1. Then, the bottom temperature sensor 2-1 and the bottom water volume sensor 2-2 are installed under the electric heat tracing components 2. After laying the heat conduction net 1-2, the steel pressure plate 1-3 is inserted into the studs 1-1 and presses down the electric heat tracing components 2. The bolts are tightened. After installing the end drainage pools 4 with the upper opening at both ends of the steel plate ice melting tank 1, the electric heat tracing components 2 are electrically connected to the signal output module 3-3 in the intelligent control cabinet 3. The bottom temperature sensor 2-1, the bottom water volume sensor 2-2, and the base temperature sensor 3-4 installed on the bridge tower beam are electrically connected to the signal receiving module 3-1 and the display module 3-2 in the intelligent control cabinet 3. The installation is completed.

[0064] The base temperature sensor 3-4, the bottom temperature sensor 2-1, and the bottom water volume sensor 2-2 installed on the crossbeam of the bridge tower are activated, and the real-time temperature and water volume are displayed on the display module 3-2.

[0065] When the signal receiving module 3-1 in the intelligent control cabinet 3 receives a temperature of ≤5℃ from the substrate temperature sensor 3-4 and the signal of the bottom water volume sensor 2-2 is saturated, it indicates that there is water or snow accumulation in the steel plate de-icing tank 1, which poses a risk of freezing or has already frozen. Depending on the temperature range, the signal output module 3-3 in the intelligent control cabinet 3 starts the preheating, intermittent energy-saving operation, or full-speed de-icing mode, and the melted precipitation is accumulated and discharged to the end drainage pool 4.

[0066] When the signal receiving module 3-1 in the intelligent control cabinet 3 receives at least one of the following conditions: the bottom temperature sensor 2-1 exceeds the preset temperature, the bottom water volume sensor 2-2 is not saturated, or the temperature of the substrate temperature sensor 3-4 is greater than 5°C, the signal output module 3-3 in the intelligent control cabinet 3 immediately cuts off the connection between the electric heat tracing component 2 and the power supply 3-7 and stops heating.

[0067] The signal output module 3-3 controls the relay 3-5 to engage or disengage, thereby starting or stopping the heating of the electric heat tracing assembly 2;

[0068] In the event of a failure in the main circuit of the electric heat tracing assembly 2, the current transformer will automatically switch to the backup circuit.

[0069] Camera 5 is installed on the bridge tower beam above the steel plate melting tank 1 and on the intelligent control cabinet 3, so as to monitor the melting of the steel plate melting tank 1 and the operation of the intelligent control cabinet 3 by the staff through video.

[0070] The remote output terminal 6 of the display module 3-2 transmits the relevant data of the display module 3-2 to the staff's mobile phone or computer via the Internet. At the same time, when the displayed data exceeds the set threshold, an alarm signal will be sent to the staff through the alarm module 7.

[0071] Example 1 of an intelligent anti-icing method for bridge tower beams

[0072] First, fix the steel plate ice melting tank 1 to one side of the bridge tower beam that is prone to ice formation. Then, activate the base temperature sensor 3-4, the tank bottom temperature sensor 2-1, and the tank bottom water volume sensor 2-2 installed on the bridge tower beam. The real-time temperature and water volume are displayed on the display module 3-2.

[0073] When the signal receiving module 3-1 in the intelligent control cabinet 3 receives a temperature of 2 to 5°C from the substrate temperature sensor 3-4 and the signal of the bottom water volume sensor 2-2 is saturated, it indicates that there is water or snow accumulation in the steel plate ice melting tank 1. The signal output module 3-3 in the intelligent control cabinet 3 then starts the preheating mode of the electric heat tracing component 2.

[0074] When the signal receiving module 3-1 in the intelligent control cabinet 3 receives a temperature of 0 to 2℃ from the substrate temperature sensor 3-4 and the signal of the bottom water volume sensor 2-2 is saturated, it indicates that the water or snow in the steel plate de-icing tank 1 is at risk of freezing. The signal output module 3-3 in the intelligent control cabinet 3 then starts the intermittent operation energy-saving mode of the electric heat tracing component 2.

[0075] When the signal receiving module 3-1 in the intelligent control cabinet 3 receives a temperature of ≤0℃ from the substrate temperature sensor 3-4 and the signal of the bottom water volume sensor 2-2 is saturated, it indicates that the steel plate ice melting tank 1 has frozen, and the signal output module 3-3 in the intelligent control cabinet 3 starts the full-speed ice melting mode.

[0076] The preheating mode, intermittent energy-saving mode, and full-speed ice-melting mode can be achieved by gradually increasing the temperature of the electric heat tracing component 2 by increasing the current, while the intermittent energy-saving mode can be achieved by switching the current on and off.

[0077] The melted precipitation is collected and discharged into the end drainage pond 4;

[0078] When the signal receiving module 3-1 in the intelligent control cabinet 3 receives at least one of the following conditions: the bottom temperature sensor 2-1 exceeds the preset temperature, the bottom water volume sensor 2-2 is not saturated, or the temperature of the substrate temperature sensor 3-4 is greater than 5°C, the signal output module 3-3 in the intelligent control cabinet 3 immediately cuts off the connection between the electric heat tracing component 2 and the power supply 3-7 and stops heating.

Claims

1. An intelligent anti-icing system for bridge tower crossbeams, characterized in that: The system includes multiple sets of steel plate de-icing tanks; the bottom surface of each steel plate de-icing tank is fixedly equipped with an array of studs and multiple sets of electric heat tracing components; a bottom temperature sensor and a bottom water volume sensor are installed under each electric heat tracing component; the electric heat tracing component is electrically connected to a signal output module in an intelligent control cabinet; the bottom temperature sensor, the bottom water volume sensor, and the base temperature sensor installed on the crossbeam of the bridge tower are electrically connected to a signal receiving module and a display module in the intelligent control cabinet; a heat-conducting mesh is laid above the electric heat tracing components; a steel pressure plate fitted with studs is pressed onto the heat-conducting mesh; an insulation layer is provided on the bottom surface of the steel plate de-icing tank; and end drainage pools, either closed or open at the top, are provided at both ends of the steel plate de-icing tank. The steel plate de-icing trough has a single-sided short-side U-shaped cross-section; a steel plate tie rod is provided between the inner sides of the two sides of the single-sided short-side U-shaped trough; the long side of the single-sided short-side U-shaped trough is fixed to the bridge tower beam by a high-strength anchor bolt passing through the protective pad; the electric heat tracing assembly consists of main / backup armored heat tracing cables laid in a loop; the electric heat tracing assembly is connected to the signal output module of the intelligent control cabinet through a relay; the heat-conducting mesh is made of stainless steel mesh; an insulated steel cover plate is provided outside the insulation layer; and a drainage hole is provided at the bottom of the end drainage pool. The intelligent control cabinet is equipped with a junction box; the intelligent control cabinet has two power supplies, and all external components are electrically connected to the power supplies through the junction box; current transformers are installed between the multiple sets of electric heat tracing components and the power supply circuits; the display module inside the intelligent control cabinet is also connected to a camera; the display module is also connected to a remote output terminal and an alarm module; all electrical control and signal cables are equipped with conduits; all signal transmission is controlled by PLC programming. The intelligent anti-icing method for bridge tower crossbeams based on the aforementioned system is as follows: First, fix the steel plate ice melting tank to one side of the bridge tower beam that is prone to ice formation. Then, activate the base temperature sensor, tank bottom temperature sensor, and tank bottom water volume sensor installed on the bridge tower beam. The real-time temperature and water volume are displayed on the display module. When the signal receiving module in the intelligent control cabinet receives a temperature of 2-5℃ from the base temperature sensor and the signal of the bottom water volume sensor is saturated, it indicates that there is water or snow accumulation in the steel plate de-icing tank. The signal output module in the intelligent control cabinet then activates the preheating mode of the electric heat tracing component. When the signal receiving module in the intelligent control cabinet receives a temperature of 0-2℃ from the base temperature sensor and the signal of the bottom water volume sensor is saturated, it indicates that the water or snow in the steel plate de-icing tank is at risk of freezing. The signal output module in the intelligent control cabinet then starts the intermittent operation energy-saving mode of the electric heat tracing component. When the signal receiving module in the intelligent control cabinet receives a temperature of ≤0℃ from the base temperature sensor and the signal from the bottom water volume sensor is saturated, it indicates that the steel plate ice melting tank has frozen, and the signal output module in the intelligent control cabinet starts the full-speed ice melting mode. Melted precipitation accumulates and is discharged into the end drainage ponds; When the signal receiving module in the intelligent control cabinet receives a signal indicating that the bottom temperature sensor exceeds the preset temperature, the bottom water volume sensor signal is not saturated, or the substrate temperature sensor temperature is greater than 5°C, the signal output module in the intelligent control cabinet immediately disconnects the electric heating component from the power supply and stops heating.

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