Real-time online individualized heat-exchanging intelligent temperature control system of mass concretes

Abstract

The invention discloses a real-time online individualized heat-exchanging intelligent temperature control system of mass concretes, and relates to the control on concrete water cooling in a high concrete dam casting procedure, wherein significance is provided for constructions of seamless dams. The system is characterized by comprising 1) installing a sensor in a newly casted mass concrete for measuring the temperature of the concrete in real time; 2) installing an interpolating digital temperature measuring device on water inlet/output pipes to measure the temperature of inlet and outlet water, and determining the average decreasing amplitude of the concrete temperature in real time according to a temperature difference of the inlet and outlet water; 3) determining a real-time flow according to the concrete temperature decreasing amplitude obtained in step 2); 4) installing an integrated flow and temperature control device integrated with temperature, flow and aperture controls on a water through pipe so as to realize real-time and online automatic collecting and feedback controls; 5) realizing the intelligent and individualized control on the mass concrete according to the temperature control information acquisition analysis of a temperature control acquisition instrument and the integrated flow and temperature control device and based on a temperature control gradient curve on time and space, so that an aim of casting the seamless dam is achieved.

Description

technical field [0001] The invention relates to a real-time on-line personalized heat transfer intelligent control system for mass concrete, in particular to the control of concrete heat transfer during the pouring process of a high concrete dam. Background technique [0002] For extra-high arch dams, the focus of anti-cracking during the construction period is concrete temperature control. The temperature problem of arch dam concrete should be solved mainly from two aspects: controlling temperature and improving restraint. From the perspective of temperature control, the concrete pouring temperature, the maximum concrete temperature and the final stable temperature are three characteristic temperatures, and the maximum temperature is equal to the pouring temperature plus the temperature rise of the heat of hydration. The final stable temperature depends on the local climate conditions and the structural form of the dam body, so the main control in engineering is the pourin...

AI Technical Summary

Problems solved by technology

The manual adjustment of the water flow interval is long, and the manual collection of temperature and flow data has a large workload and is greatly affected by subjective factors and equipment operating conditions

[0006] (2) The existing water system has poor precision, low efficiency, low data reliability, long collection time interval, and slow information feedback, which often lead to unsatisfactory concrete temperature control

[0007] (3) The existing temperature control does not have an automatic temperature control acquisition system for concrete dams under construction, and there is no specific control strategy

It is often impossible to accurately control the temperature of the dam concrete near the design temperature curve, and manual measurement and control are often not real-time, resulting in a large deviation between the actual dam temperature control and the expected

Therefore, during the construction of the dam, when the thermal insulation effect is not good, or when a cold wave suddenly encounters, the anti-cracking effect is often poor, which may easily lead to cracking and damage of the dam.

[0008] (4) In the existing technology, when the temperature of concrete dams is manually controlled, it is also difficult to achieve coordinated control of the overall temperature

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