Maintenance-maintenance integrated electric heating system and method for precast concrete component

Abstract

The invention discloses a precast concrete component curing-maintaining integrated electric heating system and method, and relates to the technical field of rapid curing of concrete components and heating, deicing and snow melting in cold regions, and the system comprises a concrete model, a carbon fiber heating group and temperature control equipment; wherein the concrete model is used for installing the carbon fiber heating group and carrying out fixed supporting and heat preservation on a concrete member; the carbon fiber heating group serving as an electric heating element is arranged in the concrete member, so that rapid maintenance in a manufacturing stage can be realized, and the carbon fiber heating group has a heating function in a use stage and is used for heating, deicing and snow melting in a cold region; and the temperature control equipment is connected with the heating group to intelligently adjust the temperature so as to meet the requirements of maintenance and heating or snow melting and meet the temperature management of the whole life cycle. The concrete component with the self-heating function can be rapidly prefabricated, functional integrated manufacturing of the prefabricated component is achieved, and the comprehensive efficiency of concrete curing and cold region maintenance is improved.

Description

Technical Field

[0001] The present application relates to the technical fields of rapid maintenance of concrete components and heating, deicing and snow melting in cold regions, and in particular to an integrated electric heating system and method for maintenance of precast concrete components. Background Art

[0002] The production of precast concrete components is the foundation for the development of new building industrialization, but the existing production of precast components mainly uses steam curing, which has high overall production costs due to high investment, low thermal efficiency, high process maintenance costs, and cumbersome automatic temperature adjustment. In addition, the condensation of steam makes the working conditions inside the factory poor, affecting the production efficiency and safety of workers.

[0003] Electric heating curing technology has become an effective alternative to steam curing due to its good economy and versatility. Electric heating is flexible and suitable for rapid production in the commercial concrete prefabrication industry. It can also meet the needs of on-site concrete construction in cold regions. However, as concrete hardens, the resistivity of concrete materials surges, resulting in a significant reduction in the effect of electric heating.

[0004] In order to improve the sudden drop in electrical conductivity of concrete during the hardening process, conductive concrete is generally used as the base material of components in current research. The addition of conductive materials (such as steel fiber, carbon fiber, graphite or carbon black, etc.) can control the resistivity of the material and thus improve the electrothermal performance. However, the process of preparing conductive concrete is complicated and costly, and there are problems such as uneven temperature caused by poor dispersion of conductive materials and the impact on the mechanical and durability properties of concrete, which greatly limits its large-scale application in actual engineering.

[0005] Changing chopped carbon fibers into continuous carbon fiber bundles (or belts, cloth) products can effectively solve the above problems by changing the complex electrical pathways inside the concrete material into set high-speed electrical pathways. In addition, carbon fiber products are also widely used in heating and snow melting, using the principle of resistance heating and heat conduction to solve the heating problem of hardened concrete components. However, most of these electric heating application technologies and fields are currently separated from each other and lack effective integration, resulting in the failure to fully utilize their respective functions, thus limiting their comprehensive benefits in actual engineering.

[0006] Based on the design concept of structural and functional integration, although conductive concrete can be used as an electric heating element to achieve rapid electrical maintenance, and can be used for deicing and snow melting in cold areas in later maintenance. However, considering environmental protection and sustainable development, combined with the use of green electricity, there is currently a lack of effective methods to integrate these functions into a unified system. Therefore, it is necessary to design an integrated electric heating system and method for the maintenance of precast concrete components to reduce the cost of concrete maintenance and improve the efficiency of rapid maintenance and maintenance. Summary of the invention

[0007] The purpose of this application is to provide an integrated electric heating system and method for curing and maintaining precast concrete components, which can reduce the cost of curing and maintaining concrete and improve the efficiency of rapid curing and maintaining.

[0008] To achieve the above objectives, this application provides the following solutions:

[0009] In a first aspect, the present application provides an integrated electric heating system for curing and maintaining a precast concrete component, which is applied to the rapid manufacturing stage and cold region maintenance stage of the concrete component, wherein the rapid manufacturing stage is a stage in which the concrete component is obtained by curing after being poured and vibrated, and the cold region maintenance stage is a stage in which the surface of the concrete component is heated or ice and snow are melted, and the integrated electric heating system for curing and maintaining a precast concrete component comprises a concrete model, a carbon fiber heating group, and a temperature control device;

[0010] The concrete model has a carbon fiber heating group placed inside and a heat-insulating mold installed outside, which is used to fix, support and insulate the poured concrete during the rapid manufacturing stage, so that the poured concrete can be quickly cured and formed to obtain the concrete component;

[0011] The carbon fiber heating group is arranged inside the concrete model, and serves as an electric heating element for rapid maintenance in the rapid manufacturing stage, and is used to generate heat for rapid maintenance of prefabricated concrete components after being powered on, and also provides heating or snow and ice melting functions after being powered on in the cold region maintenance stage of concrete components;

[0012] The temperature control device is connected to the carbon fiber heating group, and is used to collect the ambient temperature and control power in real time, and adjust the temperature of the carbon fiber heating group during electrical heating according to the ambient temperature, so that in the rapid manufacturing stage, the temperature of the concrete component is in a first temperature range; and in the cold area maintenance stage, the temperature of the concrete component is in a second temperature range; the first temperature range is a temperature range corresponding to the rapid maintenance requirements of the concrete component, and the second temperature range is a temperature range corresponding to the heating or snow and ice melting requirements of the surface of the concrete component.

[0013] Optionally, the integrated electric heating system for curing and maintaining precast concrete components further comprises a highly reflective plate, which is installed on the outer surface of the concrete component after pouring the concrete. The highly reflective plate is used to prevent heat loss during the manufacturing stage of the precast concrete component and to play a role in heat preservation, as well as to play a role in heat insulation during the maintenance stage in cold regions when the precast concrete component is electrified after completion.

[0014] Optionally, the carbon fiber heating group includes a plurality of parallel strip-shaped carbon fiber bundles, two ends of the strip-shaped carbon fiber bundles are respectively connected to one end of a power supply cable through electrodes, and the other end of the power supply cable is connected to the temperature control device;

[0015] When the strip-shaped carbon fiber bundle inside the concrete component is electrified, the concrete component reaches the required temperature due to the Joule heating effect and heat conduction, and the calculation is performed according to the following formula:

[0016] P=[h·A·(Tt)+m·c(TT 始 ) / Δt]·a;

[0017] Where P is power in W, and h is the heat transfer coefficient of the carbon fiber bundle in W / m 2 ℃, A is the surface area of ​​the carbon fiber bundle, unit is m 2 , T is the required temperature of the concrete component, in °C, t is the ambient temperature, in °C, m is the mass of the concrete component, in kg, c is the specific heat capacity of the concrete, in J / (kg·°C), T 始 is the initial temperature of the concrete member, in °C, Δt is the time required for heating, in seconds, and a is the correction factor.

[0018] Optionally, the temperature control device includes a temperature acquisition module and a voltage and current control module;

[0019] The temperature acquisition module is connected to the voltage and current control module, and the voltage and current control module is also connected to the power supply cable;

[0020] The temperature acquisition module is used to collect the ambient temperature in real time, and the voltage and current control module is used to control the temperature of the carbon fiber heating group during electrical heating by adjusting the voltage and current input to the carbon fiber heating group according to the ambient temperature.

[0021] Optionally, a connection between the strip-shaped carbon fiber bundle and the power supply cable is wrapped with a layer of epoxy resin, and a surface of the epoxy resin layer is further wrapped with a layer of heat shrink tube;

[0022] The concrete component is quickly cured and demoulded to form a single finished product, and a graphite-based thermal conductive coating or a graphene thermal conductive coating with a thickness of 0.5 mm to 2 mm is arranged on the surface close to the carbon fiber heating group.

[0023] Optionally, the first temperature range is 45-55°C, and the second temperature range is 40-50°C.

[0024] In the second aspect, the present application proposes an integrated electric heating method for curing and maintaining a precast concrete component, which is applied to the rapid manufacturing stage and cold region maintenance stage of the concrete component. The rapid manufacturing stage is a stage in which the concrete component is obtained by curing after pouring and compacting the concrete. The cold region maintenance stage is a stage in which the surface of the concrete component is heated or ice and snow are melted. The integrated electric heating method for curing and maintaining a precast concrete component comprises the following steps:

[0025] The rapid manufacturing stage:

[0026] The concrete model is used to fix, support and insulate the poured concrete to form a concrete component;

[0027] The carbon fiber heating group is used to generate heat after being energized to electrically heat the concrete component;

[0028] Using a temperature control device to collect the ambient temperature in real time, and adjusting the temperature of the carbon fiber heating group during electrical heating according to the ambient temperature, so that the temperature of the concrete component is in a first temperature range, and the first temperature range is a temperature range corresponding to the rapid maintenance requirement of the concrete component;

[0029] The cold zone maintenance phase:

[0030] The carbon fiber heating group is used to generate heat after being energized to electrically heat the concrete component;

[0031] The temperature control device is used to collect the ambient temperature in real time, and the temperature of the carbon fiber heating group during electric heating is adjusted according to the ambient temperature, so that the temperature of the concrete component is in a second temperature range, and the second temperature range is a temperature range corresponding to the heating or snow and ice melting requirements of the surface of the concrete component.

[0032] In a third aspect, the present application proposes a multi-module combined electric heating system, based on the concrete component described in the first aspect, using the plate-shaped concrete component to form a concrete plate, and multiple concrete plates with built-in carbon fiber bundles are connected according to a specific circuit combination method to form a maintenance network system for cold regions;

[0033] Each group is composed of several concrete slabs connected in series, and multiple groups are connected in parallel. By optimizing the circuit design, the total power consumption is reduced to maximize the energy utilization.

[0034] The distance between each two adjacent concrete slabs is controlled between 10mm and 20mm, and the gap is filled with modified asphalt sealant;

[0035] The multi-module combined electric heating system includes a temperature sensor embedded in each concrete slab for real-time monitoring of the temperature inside the slab; a partition control unit is connected to a number of concrete slabs connected in series and is responsible for heating control and data collection in the partition;

[0036] The central control unit communicates with each partition control unit, receives temperature data, dynamically adjusts the supply voltage and current, and realizes heating power control of each concrete slab;

[0037] The power control device is connected between the central control unit and the carbon fiber heating belt to adjust the voltage and current;

[0038] The multi-module combined electric heating system adopts intelligent control and zoning control strategies, dynamically adjusts heating strategies according to real-time environment and road conditions, and optimizes energy utilization.

[0039] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0040] The present application provides an integrated electric heating system and method for the maintenance of precast concrete components, which integrates the rapid manufacturing system in the rapid manufacturing stage and the cold region maintenance system in the cold region maintenance stage into the same system, and utilizes the high thermal conductivity and uniform heating characteristics of the carbon fiber heating group to provide a more economical, environmentally friendly and efficient system for the rapid maintenance and cold region maintenance of precast concrete components, which not only realizes the integration between the rapid manufacturing system and the cold region maintenance system, but also the carbon fiber heating group can realize rapid manufacturing, rapid maintenance and rapid snow and ice melting after power is turned on, shortening the time of concrete maintenance and heating or snow and ice melting, and improving the efficiency of maintenance and heating or snow and ice melting. In addition, through the same integrated system, it can be converted to the snow and ice melting mode in winter without the need for additional equipment or energy investment, thereby effectively reducing the cost of system upgrades or improvements, and reducing the cost of concrete maintenance and heating or snow and ice melting. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic structural diagram of an integrated electric heating system for curing and maintaining precast concrete components provided in one embodiment of the present application.

[0043] Figure 2 This is a schematic diagram of the structure of a carbon fiber heating group provided in one embodiment of the present application.

[0044] Figure 3 A schematic structural diagram of a high reflectivity plate provided in one embodiment of the present application.

[0045] Figure 4 A schematic structural diagram of a heat preservation mold provided in one embodiment of the present application.

[0046] Figure 5 A schematic cross-sectional view of a test device provided in one embodiment of the present application.

[0047] Figure 6 A schematic diagram of a combined snow melting mode of a test device provided in one embodiment of the present application.

[0048] Figure 7 A schematic flow chart of the rapid manufacturing phase of an integrated method for curing and maintaining precast concrete components provided in one embodiment of the present application.

[0049] Figure 8 A schematic flow chart of the cold region maintenance phase of an integrated method for precast concrete component curing and maintenance provided in one embodiment of the present application.

[0050] Fig. 9 A schematic diagram of the maintenance of a single concrete slab during the rapid manufacturing stage provided in one embodiment of the present application.

[0051] Fig.10 A schematic diagram of the snow-melting effect of heating a single concrete slab at a later stage provided in an embodiment of the present application.

[0052] Reference numerals:

[0053] 1-concrete model; 2-carbon fiber heating group; 3-power supply cable; 4-insulation mold; 5-temperature measuring line; 6-temperature acquisition module; 7-voltage and current control module; 8-power supply; 9-strip carbon fiber bundle; 10-high reflective plate; 11-anchor rod; 12-wire mesh; 13-concrete pad; 14-signal line; 15-partition control unit; 16-central control unit; 17, power control device; 18-environmental sensor; 19-control cabinet. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0056] Example 1

[0057] like Figure 1 As shown, this embodiment proposes an integrated electric heating system for curing and maintaining precast concrete components, which is applied to the rapid manufacturing stage and cold zone maintenance stage of concrete components. The rapid manufacturing stage is the stage of curing the concrete components after pouring and compacting, and the cold zone maintenance stage is the stage of heating the surface of the concrete components or melting ice and snow.

[0058] The integrated electric heating system for curing and maintaining precast concrete components mainly comprises a concrete model 1, a carbon fiber heating group 2 and a temperature control device.

[0059] Among them, the concrete model 1 is used as a mold to prepare concrete components. The poured concrete is placed inside the concrete model 1. In the rapid manufacturing stage, the concrete model 1 is used to fix and support the poured concrete so that the poured concrete can be cured and formed to obtain a concrete component. Therefore, the concrete model 1 is essentially a detachable mold or template for concrete, which is used to form and support concrete until the concrete hardens and has sufficient structural strength to maintain its own shape. The material of the concrete model 1 can be wood, steel, aluminum or plastic. The concrete component is the component formed after the concrete model 1 is finally dismantled, such as a concrete road slab, a bridge slab, etc.

[0060] The carbon fiber heating group 2 is arranged inside the concrete component and is used to generate heat after being energized to electrically heat the concrete component.

[0061] The temperature control device is connected to the carbon fiber heating group 2, and is used to collect the ambient temperature in real time, and adjust the temperature of the carbon fiber heating group 2 during electrical heating according to the ambient temperature, so that the temperature of the concrete component is in the first temperature range during the rapid manufacturing stage; and the temperature of the concrete component is in the second temperature range during the cold area maintenance stage. The first temperature range is a temperature range corresponding to the rapid maintenance requirements of the concrete component, and the second temperature range is a temperature range corresponding to the heating or snow and ice melting requirements of the concrete component. In this embodiment, the first temperature range is set to 45-55°C, and the second temperature range is set to 40-50°C.

[0062] In this embodiment, the integrated electric heating system for curing and maintaining precast concrete components also includes an insulation mold 4, which is detachably arranged around the concrete model 1. The insulation mold 4 is used to insulate the concrete model 1 and the concrete components during the rapid manufacturing stage. The material may be a polystyrene foam board or a polyurethane foam board, etc.

[0063] In this embodiment, the integrated electric heating system for curing and maintaining precast concrete components also includes a highly reflective plate 10, which is disposed on the upper surface of the concrete component and is arranged opposite to the carbon fiber heating group 2. The highly reflective plate 10 is used to reflect the heat generated by the carbon fiber heating group 2.

[0064] In this embodiment, the carbon fiber heating group 2 includes a plurality of parallel carbon fiber bundles, preferably a strip carbon fiber bundle 9, and the two ends of the strip carbon fiber bundle 9 are respectively connected to one end of a power supply cable 3 through electrodes, and the other end of the power supply cable 3 is connected to the temperature control device. Among them, the carbon fiber bundle can not only be set to a strip shape, but also to other shapes such as a square shape and a thin sheet shape. The electrode can be connected to the strip carbon fiber bundle 9 and the power supply cable 3 in the form of a highly conductive graphite glue. The electrode can help to distribute the current more evenly, so that the heating of the carbon fiber bundle is more uniform and avoids local overheating.

[0065] In this embodiment, the carbon fiber heating group 2 is arranged at a distance of 20-30 mm from the surface of the concrete component, and the distance between each two adjacent strip-shaped carbon fiber bundles 9 inside the carbon fiber heating group 2 is 80-120 mm, ensuring uniform heat transfer and meeting the temperature requirements of rapid maintenance and integrated snow and ice melting.

[0066] In this embodiment, the material of the strip carbon fiber bundle 9 is an epoxy resin-carbon fiber bundle composite material. By compounding high thermal conductivity carbon fiber cloth with epoxy resin, a strip carbon fiber bundle 9 of epoxy resin-carbon fiber bundle composite material is prepared, which improves thermal conductivity and durability. By adopting the carbon fiber heating group 2 of epoxy resin-carbon fiber bundle composite material, utilizing the good electrothermal performance and low energy consumption characteristics of carbon fiber, the built-in strip carbon fiber bundle 9 electrothermal method is used to produce precast concrete. The embedded strip carbon fiber bundle 9 can also use new energy electricity to achieve heating or snow and ice melting functions in cold areas during use and maintenance.

[0067] In this embodiment, the temperature control device includes a temperature acquisition module 6 and a voltage and current control module 7. The temperature acquisition module 6 is connected to the voltage and current control module 7, and the voltage and current control module 7 is also connected to the power supply cable 3. The temperature acquisition module 6 is used to collect the ambient temperature in real time, and the voltage and current control module 7 is used to control the temperature of the carbon fiber heating group 2 during electrical heating by dynamically adjusting the voltage and current input to the carbon fiber heating group 2 according to the ambient temperature, so as to meet the temperature requirements of rapid manufacturing and cold area maintenance stages and realize integrated temperature management.

[0068] In this embodiment, the temperature acquisition module 6 includes a temperature measuring line 5, and the temperature measuring line 5 includes a metal head, which is close to the surface of the concrete model 1 and is used to collect the ambient temperature in real time. On the basis of the temperature measuring line 5, a temperature detector can also be set on the surface of the concrete component to dynamically display the real-time temperature through the temperature detector.

[0069] In this embodiment, the connection between the strip carbon fiber bundle 9 and the power supply cable 3 is wrapped with a layer of epoxy resin, and the surface of the epoxy resin layer is further wrapped with a layer of heat shrink tube. The connection between the strip carbon fiber bundle 9 and the power supply cable 3 is first fixed and insulated by the epoxy resin layer, and then further protected by the heat shrink tube after curing.

[0070] In this embodiment, a plurality of concrete pads 13 are evenly arranged between the carbon fiber heating group 2 and the concrete model 1. The concrete pads 13 are used to separate the carbon fiber heating group 2 and the concrete model 1, so as to achieve uniform heating of the concrete components in the concrete model 1 by the carbon fiber heating group 2, thereby improving the heating effect and efficiency.

[0071] In this embodiment, the strip-shaped carbon fiber bundle 9 inside the concrete component is energized, and due to the Joule heat effect and heat conduction, the concrete component reaches the required temperature, which is calculated according to the following formula:

[0072] P=[h·A·(Tt)+m·c(TT 始 ) / Δt]·a;

[0073] Where P is power in W, and h is the heat transfer coefficient of the carbon fiber bundle in W / m 2 ℃, A is the surface area of ​​the carbon fiber bundle, unit is m 2 , T is the required temperature of the concrete component, in °C, t is the ambient temperature, in °C, m is the mass of the concrete component, in kg, c is the specific heat capacity of the concrete, in J / (kg·°C), T 始 is the initial temperature of the concrete component, in °C, Δt is the time required for heating, in seconds, and a is the correction coefficient. In this embodiment, a is 1.15.

[0074] The power is calculated based on the size of the concrete component, the temperature required for rapid manufacturing of the concrete component and maintenance in cold regions, and the above formula. The power regulation of the concrete component during the rapid manufacturing stage and the cold region maintenance stage is adjusted by real-time temperature data collection of the temperature control equipment to adjust the input power, thereby ensuring that the concrete component reaches the optimal temperature during rapid maintenance and snow and ice melting by changing the input of voltage and current.

[0075] In this embodiment, the concrete component is quickly cured and demoulded to form a single finished product, and a graphite-based thermal conductive coating or a graphene thermal conductive coating with a thickness of 0.5 mm to 2 mm is provided on the surface close to the carbon fiber heating group 2 .

[0076] In this embodiment, since the electric heating performance of the carbon fiber bundle is good, 3-4 times the maintenance power can be used for rapid temperature increase during the rapid manufacturing stage of the concrete component. For example, if the maintenance power is 120W, the heating power during rapid temperature increase can be 4 times the maintenance power, and 480W can be used. During the maintenance stage in cold areas, 1-2 times the maintenance power can be used. Since the carbon fiber heating group 2 itself is dynamically adjustable in power, in the initial stage of maintenance, the required temperature of the concrete can be quickly reached by using a heating power 3-4 times higher than the maintenance power to quickly heat up, thereby accelerating the hydration reaction of the cement and the hardening process of the concrete. This method is particularly suitable for construction in low temperature environments, and can effectively shorten the maintenance time and improve construction efficiency.

[0077] In this embodiment, a carbon fiber heating group 2 is embedded in the concrete component, and the carbon fiber heating group 2 is connected to the power supply cable 3 in parallel and series to form an optimized electric heating network, realizing the integration of rapid maintenance and heating or snow and ice melting functions of the concrete component. The power regulation of the concrete component in the rapid manufacturing stage and the cold area maintenance stage uses the temperature control equipment to collect the temperature data of the concrete component and adjust the input power. By changing the voltage and current, it is ensured that the concrete component reaches the optimal temperature at different stages, realizing temperature management throughout the life cycle.

[0078] In this embodiment, the material of the high reflective plate 10 is a polyurethane-carbon fiber composite material, which is compounded by continuous fibers and polyurethane resin, and is arranged on another surface of the concrete component away from the carbon fiber heating group 2 and arranged opposite to the carbon fiber heating group 2, thereby ensuring the best reflection effect of the heat generated by the carbon fiber heating group 2, enhancing thermal efficiency, and supporting integrated functions. By setting the high reflective plate 10 of the polyurethane-carbon fiber composite material, not only the mechanical strength of the high reflective plate 10 is enhanced, but also the heat reflection effect is improved, and the heat energy loss is reduced, which is particularly suitable for the scene of snow melting in winter.

[0079] In this embodiment, the material of the heat-insulating mold 4 is polystyrene foam. The heat-insulating mold 4 is arranged around the concrete mold and can be reused to improve the heat-insulating effect.

[0080] In order to make the technical solution of the present application clearer, an implementable technical solution is described below in the form of an example.

[0081] In this embodiment, the length of the concrete model 1 is 1000 mm, the width is 500 mm, and the thickness is 120 mm. The required heating power is accurately calculated by formula (1) to be 480 W, and the maintenance power is 120 W, thereby determining the size of the carbon fiber bundle: the length is 900 mm, the width is 25 mm, the required heating voltage is 36 V, and the maintenance voltage is 18 V, so as to ensure that the concrete component reaches 45-55° C. in the rapid manufacturing stage and 40-55° C. in the snow and ice melting stage. Two layers of steel mesh are provided in the concrete model 1, and the carbon fiber bundles are connected in parallel through the power supply cable 3. The high thermal conductivity carbon fiber cloth is cut with a cutting tool to form four carbon fiber bundles with a length of 900 mm and a width of 25 mm. The spacing between each two adjacent carbon fiber bundles is controlled at 80-120 mm as shown in the figure. The connected carbon fiber bundles are immersed in a casting epoxy resin for insulation treatment. After the treatment, an electrical test is performed to ensure that there is no leakage or poor insulation. A carbon fiber bundle epoxy resin composite material is prepared. A heat shrink tube is used at the connection between the carbon fiber bundle and the power supply cable 3 for further insulation and waterproof and moisture-proof, and finally a carbon fiber heating group 2 is formed.

[0082] Will Figure 2 The carbon fiber heating group 2 is tied to the steel mesh with fine steel wires, and four concrete pads 13 with a length, width and height of 20 mm are evenly distributed in the concrete model 1. The steel mesh 12 tied with the carbon fiber heating group 2 is placed on the concrete pad 13, as shown in FIG. Figure 4 As shown, ensure that the carbon fiber heating group 2 is 20mm away from the lower surface of the concrete model 1, and effectively and evenly heat. At the same time, the temperature measuring line 5 is fixed to the steel mesh with a fine steel wire to ensure that the metal head of the temperature measuring line 5 is within 20mm of the surface of the concrete model 1. Pour cement concrete C50 in the concrete model 1, and vibrate it with a concrete vibrator to ensure that the carbon fiber heating group 2 is tightly combined with the concrete. When the cement concrete is poured to a thickness of 100mm, put in the steel mesh to ensure the bearing capacity of the concrete component, and continue to pour to a thickness of 120mm. A high-reflectivity board 10 of a polyurethane-carbon fiber composite material is prepared in advance. The high-reflectivity board 10 uses continuous fibers to ensure higher strength and rigidity. Specifically, the fibers are pre-impregnated in polyurethane resin to ensure that the fibers are completely covered, and are carried out under vacuum or pressure to avoid air bubbles and ensure uniform distribution of the polyurethane resin. The curing process can be carried out at room temperature or accelerated by heating. The cured composite material is machined and cut to form a high-reflectivity board 10 with a length of 1000mm and a width of 500mm. The high reflective plate 10 is installed on the upper surface of the concrete model 1 through a number of evenly distributed anchor rods 11, such as Figure 3 As shown, it ensures the loss of heat and water in the rapid manufacturing stage, effectively prevents the heat loss in the snow melting and ice melting stage, and improves the efficiency of snow melting and ice melting.

[0083] Then, a prefabricated polystyrene foam material with a thickness of 50 mm is installed around the concrete model 1. Figure 4 At the same time, the upper surface of the concrete model 1 is covered with thermal insulation cotton to ensure the heat loss in the rapid manufacturing stage and improve the thermal insulation performance. The temperature measuring line 5 is connected to the temperature acquisition module 6 to collect temperature data; the power supply cable 3 is connected to the voltage and current control module 7 to control the heating power to form a temperature control device. The temperature control device is installed and connected to the power supply 8. Figure 1 As shown. An AC variable frequency power supply can be used, and the collected temperature can be displayed in real time according to the temperature collection module 6. By operating the AC variable frequency power supply and the voltage and current control module 7, the voltage and current (i.e., power) flowing through the strip carbon fiber bundle 9 can be controlled, so that the strip carbon fiber bundle 9 reaches the required temperature. The finally formed concrete precast component curing-maintenance integrated electric heating system is as follows Figure 5 shown.

[0084] In this embodiment, when curing and curing the concrete component, the concrete model 1 is first pre-cured for 6 hours, and the carbon fiber heating group 2 in the concrete component is powered by the temperature control device. The carbon fiber heating group 2 generates heat for heating for 24 hours, and the temperature is 55°C, ensuring that the concrete component is quickly prepared and has sufficient strength and durability. The carbon fiber heating group 2 can be directly turned on for power supply and electric heating to melt snow and ice. Alternatively, the concrete mold can be placed in reverse so that one side of its carbon fiber heating group 2 faces up. At this time, due to the reverse inversion, the concrete component will be located on the upper surface of the concrete component, and the high reflective plate 10 will be located on the lower surface of the concrete component. In this case, the effect of melting snow and ice is better. Power is supplied to the carbon fiber heating group 2 in the concrete component through the temperature control device. The heat generated by the carbon fiber heating group 2 is quickly transferred to the surface of the concrete component, and the snow and ice begin to melt. The temperature control device can also control the power supply time and the voltage and current to achieve the best performance of the snow melting effect while avoiding energy waste. After the snow melting is completed, the power supply is stopped, and the ice and snow on the surface of the concrete component will melt quickly.

[0085] Among them, pre-curing for 6 hours refers to a 6-hour pre-curing process, as follows:

[0086] (1) Concrete pouring

[0087] Completion of concrete pouring: Pour the concrete evenly into the concrete form 1 according to the design requirements, ensuring that the concrete form 1 is completely filled and following proper vibration techniques to eliminate air bubbles and voids.

[0088] (2) Initial processing

[0089] Surface leveling: After pouring the concrete, immediately use a trowel or other appropriate tool to level the concrete surface to ensure that the surface is flat and smooth.

[0090] (3) Coverage protection

[0091] Immediate Covering: After pouring, the concrete surface should be covered with plastic film immediately. This helps control the evaporation of water on the concrete surface and maintain a suitable curing temperature.

[0092] Insulation: An insulation mold 4 is arranged around the concrete model 1 to facilitate insulation.

[0093] (4) Pre-curing

[0094] In the next 6 hours, the covering material on the concrete surface is not removed to ensure that the temperature and humidity conditions are conducive to the hydration reaction. The concrete is placed at room temperature for 6 hours for natural hydration reaction. After the pre-curing is completed, the carbon fiber heating group 2 is powered on, and the rapid manufacturing stage is entered through the electric heating effect of the carbon fiber heating group 2.

[0095] In this embodiment, the surface of the concrete model 1 near one end of the carbon fiber heating group 2 is connected to the temperature measuring line 5 through the temperature acquisition module 6, and the power supply cable 3 is connected through the voltage and current control module 7, so as to control the preparation temperature and snow melting temperature of the concrete component as required. By embedding the carbon fiber bundle in the concrete component and utilizing the electrothermal performance of the carbon fiber bundle, the rapid maintenance and effective snow melting and ice melting of the concrete component are realized, and the application efficiency under severe climatic conditions is significantly optimized. By accurately calculating the required power, the size of the carbon fiber bundle and the required voltage can be determined in the design stage to ensure that the concrete component reaches the optimal temperature during the rapid maintenance and snow melting and ice melting process. This integrated solution not only improves the construction efficiency, but also enhances the use safety and environmental adaptability of the concrete component. It not only solves the limitations of the existing prefabricated concrete components in snow melting and ice melting, but also provides an efficient and reliable solution under various climatic conditions, optimizes the operating cost and maintenance frequency, and thus shows significant advantages in modern construction projects. By combining multiple technologies such as heating technology, reflection technology, insulation technology and precise control technology, an integrated solution is provided, which is suitable for various climatic conditions and various different usage scenarios, such as roads, bridges and other infrastructure projects, and can significantly improve construction efficiency and ease of use.

[0096] This embodiment embodies the design concept of functional integration by embedding the carbon fiber heating group 2 into the concrete component, which not only serves as a heating element in the rapid manufacturing stage, but also provides snow and ice melting functions in the use stage. The carbon fiber heating group 2 is connected to the power supply cable 3 in parallel to ensure a stable energy supply and uniform heat distribution. The highly reflective plate 10 is installed on the outer surface of the concrete component, which effectively enhances the thermal efficiency and reduces the loss of heat energy. The insulation mold 4 surrounds the outside of the concrete mold, which helps to maintain the required temperature environment during the rapid manufacturing stage and ensure that the concrete hardens quickly. The temperature control device connects the carbon fiber heating group 2 and the power supply cable 3, and can adjust the temperature to meet the specific needs of rapid maintenance and snow and ice melting. It is a more direct, more controllable and more economical and efficient solution.

[0097] Example 2

[0098] This embodiment proposes an integrated method for curing and maintaining precast concrete components, which is applied to the rapid manufacturing stage and cold region maintenance stage of concrete components. The rapid manufacturing stage is the stage of rapidly curing the concrete components after pouring and compacting, and the cold region maintenance stage is the stage of heating the surface of the concrete components or melting ice and snow.

[0099] like Figure 7 As shown, this embodiment is mainly an electric heating method applied to the rapid manufacturing stage of concrete. The method is based on the integrated electric heating system for curing and maintaining precast concrete components in Example 1. The method specifically includes the following steps:

[0100] Step S101: Use the concrete model 1 to fix and support the poured concrete to form a concrete component.

[0101] Step S102: utilizing the carbon fiber heating group 2 to generate heat after being powered on, and electrically heating the concrete component.

[0102] Step S103, using a temperature control device to collect the ambient temperature in real time, and adjusting the temperature of the carbon fiber heating group 2 during electric heating according to the ambient temperature, so that the temperature of the concrete component is in a first temperature range, and the first temperature range is a temperature range corresponding to the rapid maintenance demand of the concrete component.

[0103] Example 3

[0104] This embodiment proposes an integrated curing and maintenance method for precast concrete components, which is applied to the rapid manufacturing stage and cold region maintenance stage of concrete components. The rapid manufacturing stage is the stage of curing the concrete components after pouring and compacting, and the cold region maintenance stage is the stage of heating the surface of the concrete components or melting ice and snow.

[0105] like Figure 8 As shown, this embodiment is mainly applied to the electric heating method of the cold region maintenance stage of the concrete component. The method is based on the integrated maintenance method of the precast concrete component in Example 1. The method specifically includes the following steps:

[0106] Step S201: utilizing the carbon fiber heating group 2 to generate heat after being powered on, and electrically heating the concrete component.

[0107] Step S202, using the temperature control device to collect the ambient temperature in real time, and adjusting the temperature of the carbon fiber heating group 2 during electric heating according to the ambient temperature, so that the temperature of the concrete component is in a second temperature range, and the second temperature range is a temperature range corresponding to the snow and ice melting requirements of the concrete component.

[0108] Example 4

[0109] This embodiment proposes a multi-module combined electric heating system, which connects several concrete slabs to achieve a combined snow melting mode. For example, 20 concrete slabs with built-in high-performance carbon fiber bundles are connected in an optimized circuit combination mode to achieve efficient snow and ice melting effects and minimize energy consumption. Specifically, based on the concrete component described in Example 1, a plate-shaped concrete component is used to form a concrete slab, and multiple concrete slabs with built-in carbon fiber bundles are connected in a specific circuit combination mode to form a network system for snow and ice melting.

[0110] Each group is composed of several concrete slabs connected in series, and multiple groups are connected in parallel. By optimizing the circuit design, the total power consumption is reduced to maximize the energy utilization.

[0111] The distance between each two adjacent concrete slabs is controlled between 10mm and 20mm, and the gap is filled with modified asphalt sealant to ensure the integrity and waterproofness of the road surface and support the realization of integrated functions;

[0112] The multi-module combined electric heating system includes a temperature sensor embedded in each concrete slab for real-time monitoring of the temperature inside the slab;

[0113] The zone control unit is connected to several concrete slabs in series and is responsible for heating control and data collection in this zone;

[0114] The central control unit communicates with each partition control unit, receives temperature data, dynamically adjusts the supply voltage and current, and realizes heating power control of each concrete slab;

[0115] The power control device is connected between the central control unit and the carbon fiber heating belt to adjust the voltage and current;

[0116] The multi-module combined electric heating system adopts intelligent control and zoning control strategies, dynamically adjusts heating strategies according to real-time environment and road conditions, and optimizes energy utilization.

[0117] In this embodiment, the dimensions of each concrete slab are 1000 mm in length, 500 mm in width and 120 mm in height, and four high-performance carbon fiber tapes arranged in parallel are embedded inside. The carbon fiber tapes are 900 mm in length, 25 mm in width and 80 mm in spacing.

[0118] In this embodiment, the concrete slabs are connected in series to form a group of 4 slabs, forming a total of 5 groups connected in parallel to form a snow-melting and ice-melting network;

[0119] In the rapid heating stage, the system adjusts the power supply voltage to 144V, achieving a heating power of 480W per slab and a total power of 9600W, so that the surface temperature of the concrete slab quickly rises to 40-55°C;

[0120] During the maintenance phase, the system adjusts the power supply voltage to 72V, achieving a maintenance power of 120W for each panel and a total power of 2400W, maintaining the snow-melting and ice-melting effects while reducing energy consumption.

[0121] The specific implementation steps of the multi-module combined electric heating system in this embodiment are as follows:

[0122] First, every 4 concrete slabs are connected in series to form a group, forming a total of 5 groups, and then these 5 groups are connected in parallel. The dimensions of each concrete slab are 1000mm in length, 500mm in width, and 120mm in height, and four high-performance carbon fiber strips (length 900mm, width 25mm, spacing 80mm) arranged in parallel are embedded inside. The spacing between the slabs is controlled between 10mm and 20mm, and the gap is filled with modified asphalt sealant. In the rapid heating stage, a voltage of 36V is used, the heating power of each slab is 480W, the total voltage is 144V (36V×4 slabs in series), the total current is 66.65A (13.33A per group×5 groups in parallel), and the total power is 9600W. Through this configuration, the surface temperature of the concrete slab can be raised to 40-55℃ in a short time, and snow and ice can be melted quickly.

[0123] After entering the maintenance phase, the voltage is adjusted to 72V (18V×4 panels in series), the maintenance power of each panel is reduced to 120W, the total current is reduced to 33.35A (6.67A per group×5 groups in parallel), and the total power is reduced to 2400W. At this point, the system significantly reduces energy consumption while maintaining the snow melting effect.

[0124] To further optimize energy utilization, intelligent control systems and zoning control strategies are introduced. Each concrete slab has a built-in high-precision temperature sensor to monitor the temperature and environmental conditions inside the slab in real time. The data from these sensors is transmitted to the central control unit 16, which is installed in the control cabinet 19 on site. Figure 6 shown.

[0125] The power control device 17 uses a solid-state relay to accurately adjust the supply voltage and current according to the instructions of the central control unit 16 to achieve dynamic control of the heating power. In this way, the system can avoid overheating and energy waste. For example, when a certain area reaches the set temperature or there is no snow, the central control unit 16 can instruct the corresponding area to reduce power output or turn off heating.

[0126] The entire heating area is divided into multiple independent zone control units 15, for example, 4 panels form a zone, for a total of 5 zones. Each zone control unit uses an embedded controller, which is installed in the junction box of each zone. It is responsible for the on / off and power adjustment of the heating elements in the zone, and collects the data of the temperature sensor and uploads it to the central control unit 16 through the signal line 14. In this way, the system can enable or disable the heating function of a specific zone as needed according to the snow melting needs of different zones, which improves the flexibility of the system and further reduces unnecessary energy consumption.

[0127] In addition, the system is also equipped with environmental sensors 18, such as outdoor temperature and humidity sensors, snow depth sensors, and wind speed and direction sensors, which are set at key locations on roads or bridges. Based on the data from these sensors, the central control unit 16 preheats the icing-prone areas in advance to prevent snow accumulation. In actual operation, when the environmental sensor 18 detects low temperature and snowfall warnings, the central control unit 16 starts the preheating mode. During the rapid heating stage, the system heats to 50°C as set. After reaching the set temperature, the system automatically switches to the maintenance stage and reduces the power output. If the temperature of a partition continues to be higher than the set value, the central control unit 16 may instruct the partition control unit of the partition to further reduce the power or temporarily turn off the heating.

[0128] To ensure the safety and energy saving of the system, an overheat protector or thermistor is installed. When the temperature of the concrete slab exceeds the upper limit of safety, the power supply is automatically cut off to prevent equipment damage and safety accidents. The system is also equipped with an energy metering module to monitor current, voltage and power in real time, record energy consumption data, and facilitate analysis and optimization of system operation. When energy consumption increases abnormally, the system can issue an alarm to prompt inspection. In addition, the system has remote monitoring and management functions. Managers can view the system status in real time through computers or mobile phones, adjust parameters, and realize fault diagnosis and rapid response.

[0129] By installing temperature sensors 5, partition control units 15, power control devices 17 and environmental sensors 18 at key nodes, an organic combination of intelligent control and partition control is achieved. The system can dynamically adjust the heating strategy according to the real-time environment and road conditions, which not only ensures the effect of snow and ice melting, but also minimizes energy consumption and prolongs the service life of the equipment. This innovative design provides an efficient, reliable and intelligent snow and ice melting solution for roads and bridges in cold areas.

[0130] This embodiment cleverly proposes a modular snow-melting power grid design, which forms a snow-melting and ice-melting power grid mode by combining several concrete slabs with built-in carbon fiber bundles in a specific series-parallel manner. The concrete slabs are connected by optimized circuits to achieve coordinated heating of large areas. The partition control unit and the central control unit cooperate with each other to dynamically adjust the heating strategy according to the real-time environment and road conditions to ensure uniform heat distribution and optimize energy utilization. This modular design improves the flexibility and scalability of the system and is suitable for roads and bridges of different sizes and shapes.

[0131] Fig. 9 This is a schematic diagram of the maintenance of a single concrete slab in the rapid manufacturing stage. The background is the rapid manufacturing stage, the rectangular frame is a thermal imaging shot, and the number bar on the right represents the temperature of the single concrete slab in the rapid manufacturing stage. Fig.10 This is a schematic diagram of the effect of using a single concrete slab to heat and melt snow in the later stage. The background is a scene where heating and melting snow are needed on a snowy day. The ambient temperature is below 0℃ and the snow and ice melting is nearing completion. The rectangular frame is also a thermal imaging shot, and the number bar on the right indicates the temperature corresponding to the carbon fiber heating group 2.

[0132] The present invention adopts carbon fiber bundle epoxy resin composite material as carbon fiber heating group, which can not only transfer heat more evenly and quickly, but also has good insulation performance. In the manufacturing stage, the built-in carbon fiber bundle is cured by electric heating to achieve rapid prototyping; in the use stage, the pre-buried carbon fiber bundle is used to achieve snow and ice melting function. The high reflective plate adopts polyurethane-carbon fiber composite material, which not only strengthens the mechanical strength of the plate, but also improves the heat reflection effect and significantly reduces the heat energy loss. Especially in the winter snow and ice melting operation, the high reflective plate can effectively reflect the heat back to the concrete surface, improve the heat utilization rate and reduce energy consumption. By combining several concrete plates with built-in carbon fiber bundles in a specific series-parallel mode, a snow and ice melting power grid mode is formed. The concrete plates are connected by optimized circuits to achieve coordinated heating of a large area. The partition control unit and the central control unit cooperate with each other to dynamically adjust the heating strategy according to the real-time environment and road conditions to ensure uniform heat distribution and optimize energy utilization. This modular design improves the flexibility and scalability of the system and is suitable for roads and bridges of different sizes and shapes. The optimal temperature environment is maintained in the rapid manufacturing stage through the insulation mold to ensure the quality and performance of the concrete. The real-time monitoring and adjustment functions of the temperature control equipment enable the system to automatically adjust according to demand, improving construction efficiency and ease of use, and enhancing the safety of component use and environmental adaptability.

[0133] The core of the present invention is to build carbon fiber bundles into concrete slabs, so that concrete slabs can be quickly cured by generating heat, and the concrete slabs that have been quickly cured can be heated again by the built-in carbon fiber bundles as a heating element to achieve heat generation on the surface of the concrete slabs, and then the snow and ice melting of the sidewalks, the effect of indoor floor heating, the snow and ice melting of the bridge deck or road surface, etc. In addition, the concrete slabs are produced by prefabrication, and the components inside the concrete slabs (carbon fiber heating groups, high reflective panels, etc.) can be prefabricated first, and then several concrete slabs can be combined and connected to form an integrated system to achieve the above functions. Through the optimized design of the built-in carbon fiber bundles, its uniform distribution in the concrete is ensured, which fundamentally improves the heat transfer efficiency. At the same time, the carbon fiber material has excellent corrosion resistance and anti-aging properties, and can maintain stable electrical conductivity under harsh environments. In addition, the electric heating performance of the built-in carbon fiber bundles is highly controllable, and the power can be adjusted in real time through the intelligent temperature control system to achieve precise heating effects and avoid local overheating and energy waste. In addition, the manufacturing process of the built-in carbon fiber bundles is relatively simple, and can be seamlessly combined with conventional concrete production processes, thereby reducing production costs and technical barriers. Compared with the complex formula of traditional conductive concrete, the addition of built-in carbon fiber bundles does not require special treatment, which simplifies the material selection and preparation process. In addition, the present invention allows the built-in carbon fiber bundles to be electrically cured during the production stage of concrete components, which not only improves the early strength of concrete, but can also be reused in the later snow and ice melting, demonstrating its versatility. Built-in carbon fiber bundle concrete panels can be combined with green power systems such as wind power generation and photovoltaics to provide sustainable energy solutions for infrastructure in cold regions, helping to achieve low-carbon and environmentally friendly goals.

[0134] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0135] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. An integrated electric heating system for curing and maintaining a precast concrete component, which is applied to the rapid manufacturing stage and cold region maintenance stage of the concrete component, wherein the rapid manufacturing stage is the stage of curing the concrete component after pouring and compacting, and the cold region maintenance stage is the stage of heating the surface of the concrete component or melting ice and snow, and is characterized in that: The integrated electric heating system for curing and maintaining precast concrete components includes a concrete model, a carbon fiber heating group and a temperature control device; The concrete model has a carbon fiber heating group placed inside and a heat-insulating mold installed outside, which is used to fix, support and insulate the poured concrete during the rapid manufacturing stage, so that the poured concrete can be quickly cured and formed to obtain the concrete component; The carbon fiber heating group is arranged inside the concrete model, and serves as an electric heating element for rapid maintenance in the rapid manufacturing stage, and is used to generate heat for rapid maintenance of prefabricated concrete components after being powered on, and also provides heating or snow and ice melting functions after being powered on in the cold region maintenance stage of concrete components; The temperature control device is connected to the carbon fiber heating group, and is used to collect the ambient temperature and control power in real time, and adjust the temperature of the carbon fiber heating group during electrical heating according to the ambient temperature, so that in the rapid manufacturing stage, the temperature of the concrete component is in a first temperature range; and in the cold area maintenance stage, the temperature of the concrete component is in a second temperature range; the first temperature range is a temperature range corresponding to the rapid maintenance requirements of the concrete component, and the second temperature range is a temperature range corresponding to the heating or snow and ice melting requirements of the surface of the concrete component.

2. The integrated electric heating system for curing and maintaining precast concrete components according to claim 1 is characterized in that: The integrated electric heating system for curing and maintaining precast concrete components also includes a high reflectivity plate, which is installed on the outer surface of the concrete component after pouring concrete. The high reflectivity plate is used to prevent heat loss during the manufacturing stage of the precast concrete component and play a heat-insulating role, as well as to play a heat-insulating role during the cold-region maintenance stage when the precast concrete component is powered on after completion.

3. The integrated electric heating system for curing and maintaining precast concrete components according to claim 1 is characterized in that: The carbon fiber heating group includes a plurality of parallel strip-shaped carbon fiber bundles, two ends of the strip-shaped carbon fiber bundles are respectively connected to one end of a power supply cable through electrodes, and the other end of the power supply cable is connected to the temperature control device; When the strip-shaped carbon fiber bundle inside the concrete component is electrified, the concrete component reaches the required temperature due to the Joule heating effect and heat conduction, and the calculation is performed according to the following formula: P=[h·A·(T-t)+m·c(T-T 始 ) / Δt]·a; Where P is power in W, and h is the heat transfer coefficient of the carbon fiber bundle in W / m 2 ℃, A is the surface area of ​​the carbon fiber bundle, unit is m 2 , T is the required temperature of the concrete component, in °C, t is the ambient temperature, in °C, m is the mass of the concrete component, in kg, c is the specific heat capacity of the concrete, in J / (kg·°C), T 始 is the initial temperature of the concrete member, in °C, Δt is the time required for heating, in seconds, and a is the correction factor.

4. The integrated electric heating system for curing and maintaining precast concrete components according to claim 3 is characterized in that: The temperature control device includes a temperature acquisition module and a voltage and current control module; The temperature acquisition module is connected to the voltage and current control module, and the voltage and current control module is also connected to the power supply cable; The temperature acquisition module is used to collect the ambient temperature in real time, and the voltage and current control module is used to control the temperature of the carbon fiber heating group during electrical heating by adjusting the voltage and current input to the carbon fiber heating group according to the ambient temperature.

5. The integrated electric heating system for curing and maintaining precast concrete components according to claim 3 is characterized in that: The connection between the strip-shaped carbon fiber bundle and the power supply cable is wrapped with a layer of epoxy resin, and the surface of the epoxy resin layer is also wrapped with a layer of heat shrink tube; The concrete component is quickly cured and demoulded to form a single finished product, and a graphite-based thermal conductive coating or a graphene thermal conductive coating with a thickness of 0.5 mm to 2 mm is arranged on the surface close to the carbon fiber heating group.

6. The integrated electric heating system for curing and maintaining precast concrete components according to claim 1, characterized in that: The first temperature range is 45-55°C, and the second temperature range is 40-50°C.

7. An integrated electric heating method for curing and maintaining a precast concrete component, applied to the rapid manufacturing stage and cold region maintenance stage of the concrete component, wherein the rapid manufacturing stage is the stage of curing the concrete component after pouring and compacting, and the cold region maintenance stage is the stage of heating the surface of the concrete component or melting ice and snow, characterized in that: The integrated method for curing and maintaining precast concrete components comprises the following steps: The rapid manufacturing stage: The concrete model is used to fix, support and insulate the poured concrete to form a concrete component; The carbon fiber heating group is used to generate heat after being energized to electrically heat the concrete component; Using a temperature control device to collect the ambient temperature in real time, and adjusting the temperature of the carbon fiber heating group during electrical heating according to the ambient temperature, so that the temperature of the concrete component is in a first temperature range, and the first temperature range is a temperature range corresponding to the rapid maintenance requirement of the concrete component; The cold zone maintenance phase: The carbon fiber heating group is used to generate heat after being energized to electrically heat the concrete component; The temperature control device is used to collect the ambient temperature in real time, and the temperature of the carbon fiber heating group during electric heating is adjusted according to the ambient temperature, so that the temperature of the concrete component is in a second temperature range, and the second temperature range is a temperature range corresponding to the heating or snow and ice melting requirements of the surface of the concrete component.

8. A multi-module combined electric heating system, characterized in that: Based on the concrete member of claim 1, the plate-shaped concrete member is used to form a concrete slab, and a plurality of concrete slabs with built-in carbon fiber bundles are connected in a specific circuit combination to form a network system for cold region maintenance; Each group is composed of several concrete slabs connected in series, and multiple groups are connected in parallel. By optimizing the circuit design, the total power consumption is reduced to maximize the energy utilization. The distance between each two adjacent concrete slabs is controlled between 10mm and 20mm, and the gap is filled with modified asphalt sealant; The multi-module combined electric heating system includes a temperature sensor embedded in each concrete slab for real-time monitoring of the temperature inside the slab; a partition control unit is connected to a number of concrete slabs connected in series and is responsible for heating control and data collection in the partition; The central control unit communicates with each partition control unit, receives temperature data, dynamically adjusts the supply voltage and current, and realizes heating power control of each concrete slab; The power control device is connected between the central control unit and the carbon fiber heating belt to adjust the voltage and current; The multi-module combined electric heating system adopts intelligent control and zoning control strategies, dynamically adjusts heating strategies according to real-time environment and road conditions, and optimizes energy utilization.

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