Intelligent steam curing device suitable for platform canopy and construction process

Abstract

The application relates to the technical field of platform canopy construction, and specifically discloses an intelligent steam curing device suitable for a platform canopy, which comprises a heat preservation curing cover, a steam generator, a steam pipeline and a temperature and humidity monitoring system. The heat preservation curing cover covers the side beam range of the two sides of the platform canopy, and the heat preservation curing cover is fixed by using a steel wire rope. The steam pipeline is connected with the steam generator, and the steam pipeline is laid on the top of the canopy along the length direction of the canopy. A plurality of groups of spray holes are arranged on the steam pipeline, each group of the spray holes is three, and each group of the spray holes is located on the two sides and below the steam pipeline. The temperature and humidity monitoring system comprises a temperature measuring line, a data collector and an intelligent management and control platform. The data collector is a transmitter, the transmitter is connected with the temperature measuring line, the data of a temperature and humidity sensor is collected, the data collector is connected with the intelligent management and control platform, the data is fed back to the intelligent management and control platform, the intelligent management and control platform is connected with the steam generator, the intelligent management and control platform controls the steam generator to work according to the data collected by the data collector, and the steam flow and temperature are controlled.

Description

Technical Field

[0001] This invention relates to the field of platform canopy construction technology, specifically to an intelligent steam curing device and construction process adapted to platform canopies. Background Technology

[0002] Platform canopies are core ancillary facilities of transportation hubs such as railways and urban rail transit. The main structure of the canopy mostly adopts a single (double) column, double-sided cantilever reinforced concrete beam and slab structure. The canopy components are large in volume and have high load-bearing requirements. The quality of concrete curing directly determines the structural strength, durability and service life of the platform canopy. Concrete curing is a key process to accelerate the cement hydration reaction and shorten the strength development period, especially suitable for low-temperature environments or construction scenarios with tight schedules. In the construction of platform canopies, the traditional curing process, which involves in-situ water spraying for natural curing, has the following drawbacks: 1. It lacks customized curing facilities for canopies with double-sided cantilevered sides and large curved spans, resulting in poor insulation and sealing, rapid heat and humidity loss, and insufficient curing uniformity; 2. Temperature and humidity cannot be controlled, and the temperature difference between the core and surface is prone to exceed the standard, easily causing quality defects such as concrete surface cracks and sanding; 3. Improper post-curing treatment can easily lead to concrete strength rebound due to secondary water loss, affecting the quality of structural forming; 4. The curing cycle is long, especially in high-altitude areas and low-temperature seasons, making it difficult to achieve the goal of quickly reaching the demolding strength of the concrete, which can easily delay subsequent construction.

[0003] In the prior art, patent application CN118461841A discloses a construction method for a curved, irregularly shaped, fair-faced concrete canopy. In the concrete curing process, the canopy is covered with a damp burlap sack or curing cloth, with the covering in contact with the concrete surface. In the early stage of curing, water is sprinkled 5-7 times a day to keep the covering moist. In the later stage of curing, water is sprinkled 3-5 times a day, and the watering frequency is adjusted according to the weather conditions to keep the covering moist. This curing method is called watering curing, and the curing cycle is long.

[0004] Patent CN117428912B discloses a steam curing method and device for precast concrete retaining wall components. The method involves performing physical field numerical simulation on the precast retaining wall components to obtain numerical simulation parameters. These parameters are then corrected through field tests to obtain optimal steam parameters. These optimal steam parameters are then used to steam-cur the precast retaining wall components in a curing device. The curing device includes multiple sensors and an intelligent control system to automate the steam curing process. The system automatically adjusts the steam parameters based on preset steam curing requirements and sensor data. The curing device includes a steam generator, flow regulator, humidity sensor, temperature sensor, steam nozzle, track, water collection ditch, and curing chamber. During curing, the precast retaining wall components need to be placed in the curing chamber. However, platform canopies are fixed structures and too large to be moved, therefore this steam curing method and device are not suitable for platform canopies. There is an urgent need to develop a steam curing device and construction process specifically adapted to cast-in-place reinforced concrete platform canopies. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the technical problem solved by this invention is to provide an intelligent steam curing device and construction process adapted to platform canopies, thereby solving the problems of long curing cycles and lack of suitable curing devices for existing concrete platform canopies.

[0006] To solve the above problems, the technical solution adopted by the present invention is: an intelligent steam curing device adapted to platform canopies, including an insulated curing cover, a steam generator, a steam pipe, and a temperature and humidity monitoring system. The insulated curing cover covers the area of ​​the side beams on both sides of the platform canopy and is fixed with steel wire ropes. The steel wire ropes are set along the length of the top of the canopy. The steam pipe is connected to the steam generator and is laid along the length of the canopy on the top of the canopy. The rubber tube is tied to the steel wire rope with iron wire. The steam pipe has several sets of injection holes, each set of three injection holes located on both sides and below the steam pipe. The temperature and humidity monitoring system includes a temperature measuring wire, a data acquisition device, and an intelligent control platform. The temperature measuring wire is connected to the data acquisition device, which is connected to the intelligent control platform to feed back data. The intelligent control platform is connected to the steam generator, and the intelligent control platform controls the operation of the steam generator based on the data collected by the data acquisition device, controlling the steam flow and temperature.

[0007] Furthermore, the heat-insulating and curing cover is made of flame-retardant heat-insulating and fireproof cloth with a thickness of 1mm.

[0008] Furthermore, the spacing between the steel wire ropes is 1.5m, and the diameter of the steel wire ropes is 10mm.

[0009] Furthermore, the steam pipes are high-temperature and high-pressure resistant rubber pipes with a diameter of 40mm and a wall thickness of 10mm, and the steam pipe spacing is 4.2m.

[0010] Furthermore, the diameter of the injection holes is 5mm, and the spacing between each group of injection holes is 500mm.

[0011] Furthermore, the temperature measuring lines are set up in groups of 15m apart, and each group of temperature measuring lines is equipped with eight temperature and humidity sensors. The diameter of the temperature measuring lines is 6mm.

[0012] Furthermore, the steam generator is a fuel oil steam generator.

[0013] Furthermore, the data acquisition device is a transmitter.

[0014] A steam curing process for platform canopies includes the following steps: Step 1: Preparatory procedures before curing. After the concrete of the canopy is poured, install the curing device, lay out steam pipes and temperature measuring lines. The steam pipes are set along the length of the canopy with a spacing of 4.2m. Adjust the direction of the injection holes so that the injection holes are located on both sides and below the steam pipes. Set up a set of temperature measuring lines every 15m along the length of the canopy. Cover the top of the canopy with flame-retardant, heat-insulating, and fireproof cloth, covering both sides to 50cm outside the side beam template. Overlap the seams of the flame-retardant, heat-insulating, and fireproof cloth with 40cm. Fix the flame-retardant, heat-insulating, and fireproof cloth with steel wire ropes. The steel wire ropes are set along the length of the canopy. The steam pipes, temperature measuring lines, and steel wire ropes are located below the flame-retardant, heat-insulating, and fireproof cloth. Connect the steam pipes to the steam generator, connect the temperature measuring lines to the data acquisition device, and connect the steam generator and the data acquisition device to the intelligent management and control platform. Step 2: Static rest stage, ambient temperature ≥ 5℃, do not heat up or disturb the components, let stand for 4~6 hours, and start the steam generator to heat up after the concrete has initially set; Step 3: Heating stage: Heating rate ≤10℃ / h, core-surface temperature difference ≤15℃, curing time 2~3h, real-time monitoring of data, and suspension of heating if the limit is exceeded; Step 4: Constant temperature stage: constant temperature of ordinary concrete ≤60℃, constant temperature of slag cement concrete ≤65℃, constant temperature of prestressed concrete ≤50℃, relative humidity ≥90%, steam 0.02~0.05MPa, curing time 72~96h, and fine adjustment of steam supply according to temperature and humidity data. Step 5: Cooling stage: Cooling rate ≤8℃ / h, temperature difference between components and environment ≤20℃, curing time 4~6h, natural cooling, and it is strictly forbidden to remove the flame-retardant insulation and fireproof cloth in advance; Step Six: Post-curing treatment. After curing is completed, remove the curing device and continue to moisturize by sprinkling water or spraying a penetrating curing agent. The moisturizing time for ordinary concrete should not be less than four days. After moisturizing, check the surface quality of the canopy.

[0015] Compared to existing technologies, the advantages of this solution are: 1. Strong adaptability to various scenarios: The device is designed with a dedicated structure for the insulation and curing of single (double) column canopies with double-sided cantilever and large span, as well as a steam generator, steam pipeline and temperature and humidity monitoring system. It achieves full coverage and no dead angle curing, completely solving the problem that cast-in-place concrete structures cannot be steam cured. The curing parameters can be flexibly adjusted according to the ambient temperature (low temperature / high temperature dryness) and cement type (ordinary silicate / slag / prestressed special). It is suitable for in-situ curing of various reinforced concrete structure platform canopies and station building beams and slabs in railways and urban rail transit during low temperature periods or in high-altitude areas. 2. Precise and controllable temperature and humidity: Equipped with an intelligent temperature and humidity monitoring system, it collects data in real time and combines it with standardized curing parameters to strictly control the heating / cooling rate, reduce the concrete surface defect rate to below 0.5%, and achieve a 100% compliance rate for molding quality.

[0016] 3. Significantly improved curing efficiency: Precise parameters accelerate the cement hydration reaction, and the concrete can reach the design strength in 4 days. Compared with the traditional 28-day curing cycle, the construction efficiency is greatly improved, meeting the needs of construction with tight schedules.

[0017] 4. Integrated supporting design: Integrate maintenance facilities, monitoring equipment, and auxiliary tools into an integrated system, formulate standardized construction procedures, with clear processes and standardized operations, improve on-site construction management efficiency, and reduce the error rate of human operation.

[0018] 5. Excellent safety and environmental protection: All maintenance facilities can be recycled and reused, reducing construction waste and meeting the requirements of green construction. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the arrangement of the heat-insulating curing cover and steam pipes of the curing device of the present invention; Figure 2 for Figure 1 Enlarged view of point A; Figure 3 This is a schematic diagram of the maintenance device of the present invention; Figure 4 This is a schematic diagram of the steam curing construction process of the present invention; In the diagram: 1. Thermal insulation cover; 2. Steel wire rope; 3. Steam pipe; 4. Injection hole; 5. Temperature measuring wire; 6. Iron wire; 7. Steam generator; 8. Transmitter; 9. Intelligent control platform. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Implementation, for example, attached Figures 1 to 4 The following describes an intelligent steam curing device adapted for platform canopies: It includes an insulated curing cover 1, a steam generator 7, a steam pipe 3, and a temperature and humidity monitoring system. The insulated curing cover 1 covers the area of ​​the side beams on both sides of the platform canopy. The insulated curing cover 1 is made of flame-retardant, heat-insulating, and fireproof cloth with a thickness of 1mm. The flame-retardant, heat-insulating, and fireproof cloth is fixed with steel wire ropes 2. The steel wire ropes 2 are set along the length of the canopy top, with a spacing of 1.5m between each rope, and a diameter of 10mm. The steam pipe 3 is connected to the steam generator... The generator 7 and steam pipe 3 are laid along the length of the canopy on the top of the canopy. The steam pipe 3 is a high-temperature and high-pressure resistant rubber pipe with a diameter of 40mm and a wall thickness of 10mm. The steam pipes 3 are spaced 4.2m apart. The rubber pipes are tied to the steel wire rope 2 with iron wire 6. The iron wire 6 is made of No. 12 iron wire and is tied every 500mm. The steam pipe 3 is provided with several sets of injection holes 4. Each set of injection holes 4 has three holes, which are located on both sides and below the steam pipe 3. The injection holes 4 have a diameter of 5mm. The injection holes 4 are spaced 500mm apart. Pressure gauges, safety valves, and adjustable control valves are installed at the connection points between the steam pipe 3 and the steam generator 7. The steam generator 7 is an oil-fired steam generator with automatic water level control, pressure control, low water level alarm, overpressure, and leakage protection functions. The steam generator 7 is equipped with an oil tank for oil supply and a water tank for water supply. The temperature and humidity monitoring system includes temperature measuring lines 5, a data acquisition unit, and an intelligent management and control platform 9. A set of temperature measuring lines 5 is installed every 15m in the maintenance area. Each set of temperature measuring lines 5 has eight temperature and humidity sensors to collect the temperature and humidity during the canopy maintenance process in real time. The temperature measuring lines 5 have a diameter of 6mm. The data acquisition unit is a transmitter 8 connected to the temperature measuring lines 5 to collect data from the temperature and humidity sensors. The data acquisition unit connects to the intelligent management and control platform 9 to feed back the data. The intelligent management and control platform 9 connects to the steam generator 7 and controls the operation of the steam generator 7 based on the data collected by the data acquisition unit, controlling the steam flow and temperature.

[0022] A steam curing construction process for a platform canopy, with an example of a single-column canopy 10m wide, constructed using ordinary concrete, includes the following steps: Step 1: Preparatory procedures before curing. After the concrete of the canopy is poured, install the curing device, lay out steam pipes and temperature measuring lines. The steam pipes are set along the length of the canopy with a spacing of 4.2m. Adjust the direction of the injection holes so that the injection holes are located on both sides and below the steam pipes. The temperature measuring lines are set at 15m intervals along the length of the canopy. Cover the top of the canopy with flame-retardant, heat-insulating, and fireproof cloth, covering both sides to 50cm outside the side beam template. The seams of the flame-retardant, heat-insulating, and fireproof cloth overlap by 40cm. Use steel wire ropes to fix the flame-retardant, heat-insulating, and fireproof cloth. The steel wire ropes are set along the length of the canopy. The steam pipes, temperature measuring lines, and steel wire ropes are located below the flame-retardant, heat-insulating, and fireproof cloth. Connect the steam pipes to the steam generator, and the temperature measuring lines to the data acquisition device. Connect the steam generator and the data acquisition device to the intelligent management and control platform. In this embodiment, two steam pipes and six steel wire ropes are laid. Step 2: Static rest stage, ambient temperature ≥ 5℃, do not heat up or disturb the components, let stand for 4~6 hours, and start the steam generator to heat up after the concrete has initially set; Step 3: Heating stage: Heating rate ≤10℃ / h, core-surface temperature difference ≤15℃, curing time 2~3h, real-time monitoring of data, and suspension of heating if the limit is exceeded; Step 4: Constant temperature stage: for ordinary concrete, the constant temperature is ≤60℃, the relative humidity is ≥90%, the steam pressure is 0.02~0.05MPa, and the curing time is 72~96h. The steam supply is finely adjusted according to the temperature and humidity data. Step 5: Cooling stage: Cooling rate ≤8℃ / h, temperature difference between components and environment ≤20℃, curing time 4~6h, natural cooling, and it is strictly forbidden to remove the flame-retardant insulation and fireproof cloth in advance; Step Six: Post-curing treatment. After curing is completed, remove the curing device and continue to moisturize by sprinkling water or spraying a penetrating curing agent. The moisturizing time for ordinary concrete should not be less than four days. After moisturizing, check the surface quality of the canopy. If there are any small cracks, spray crack repair agent to seal them.

[0023] Using this construction process, the surface defect rate of concrete is reduced to below 0.5%, and the molding quality meets the standards 100%. The constant temperature in step four is adjusted according to the concrete material. When the concrete is slag cement concrete, the constant temperature is ≤65℃, and when the concrete is prestressed concrete, the constant temperature is ≤50℃, which can effectively ensure the curing effect and structural strength.

[0024] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An intelligent steam curing device adapted to platform canopies, characterized in that: The system includes an insulated curing cover, a steam generator, steam pipes, and a temperature and humidity monitoring system. The insulated curing cover covers the area of ​​the side beams on both sides of the platform canopy and is secured with steel wire ropes that run along the length of the canopy's top. The steam pipes are connected to the steam generator and are laid along the length of the canopy's top. Rubber hoses are tied to the steel wire ropes with wire for fixation. The steam pipes have several sets of injection holes, with three injection holes in each set located on both sides and below the pipes. The temperature and humidity monitoring system includes a temperature measuring line, a data acquisition device, and an intelligent control platform. The data acquisition device is connected to the temperature measuring line and also connects to the intelligent control platform to feed data back to the platform. The intelligent control platform is connected to the steam generator and controls the operation of the steam generator based on the data collected by the data acquisition device, controlling the steam flow and temperature.

2. The intelligent steam curing device adapted for platform canopies according to claim 1, characterized in that: The heat-insulating and curing cover is made of flame-retardant heat-insulating and fireproof cloth with a thickness of 1mm.

3. The intelligent steam curing device adapted for platform canopies according to claim 1, characterized in that: The steel wire ropes are spaced 1.5m apart and have a diameter of 10mm.

4. The intelligent steam curing device adapted for platform canopies according to claim 1, characterized in that: The steam pipes are high-temperature and high-pressure resistant rubber pipes with a diameter of 40mm and a wall thickness of 10mm, and the steam pipe spacing is 4.2m.

5. The intelligent steam curing device adapted for platform canopies according to claim 1, characterized in that: The diameter of the injection holes is 5mm, and the spacing between each group of injection holes is 500mm.

6. The intelligent steam curing device adapted for platform canopies according to claim 1, characterized in that: The temperature measuring lines are set up in groups of 15m apart, and each group of temperature measuring lines is equipped with eight temperature and humidity sensors. The diameter of the temperature measuring lines is 6mm.

7. The intelligent steam curing device adapted for platform canopies according to claim 1, characterized in that: The steam generator is a fuel oil steam generator.

8. The intelligent steam curing device adapted for platform canopies according to claim 1, characterized in that: The data acquisition device is a transmitter.

9. A steam curing construction process for platform canopies, characterized in that, Includes the following steps: Step 1: Preparatory procedures before curing. After the concrete of the canopy is poured, install the curing device, lay out steam pipes and temperature measuring lines. The steam pipes are set along the length of the canopy with a spacing of 4.2m. Adjust the direction of the injection holes so that the injection holes are located on both sides and below the steam pipes. Set up a set of temperature measuring lines every 15m along the length of the canopy. Cover the top of the canopy with flame-retardant, heat-insulating, and fireproof cloth, covering both sides to 50cm outside the side beam template. Overlap the seams of the flame-retardant, heat-insulating, and fireproof cloth with 40cm. Fix the flame-retardant, heat-insulating, and fireproof cloth with steel wire ropes. The steel wire ropes are set along the length of the canopy. The steam pipes, temperature measuring lines, and steel wire ropes are located below the flame-retardant, heat-insulating, and fireproof cloth. Connect the steam pipes to the steam generator, connect the temperature measuring lines to the data acquisition device, and connect the steam generator and the data acquisition device to the intelligent management and control platform. Step 2: Static rest stage, ambient temperature ≥ 5℃, do not heat up or disturb the components, let stand for 4~6 hours, and start the steam generator to heat up after the concrete has initially set; Step 3: Heating stage: Heating rate ≤10℃ / h, core-surface temperature difference ≤15℃, curing time 2~3h, real-time monitoring of data, and suspension of heating if the limit is exceeded; Step 4: Constant temperature stage: constant temperature of ordinary concrete ≤60℃, constant temperature of slag cement concrete ≤65℃, constant temperature of prestressed concrete ≤50℃, relative humidity ≥90%, steam 0.02~0.05MPa, curing time 72~96h, and fine adjustment of steam supply according to temperature and humidity data. Step 5: Cooling stage: Cooling rate ≤8℃ / h, temperature difference between components and environment ≤20℃, curing time 4~6h, natural cooling, and it is strictly forbidden to remove the flame-retardant insulation and fireproof cloth in advance; Step Six: Post-curing treatment. After curing is completed, remove the curing device and continue to moisturize by sprinkling water or spraying a penetrating curing agent. The moisturizing time for ordinary concrete should not be less than four days. After moisturizing, check the surface quality of the canopy.

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