Temperature Control System of Gridded Concrete Dam

Abstract

The invention discloses a gridded concrete dam temperature control system, which includes a real-time induction machine, a temperature control server and a fast control machine connected in sequence, and also includes a database server. The fast control machine includes a plurality of industrial control machines, a plurality of A temperature compensation source, a plurality of PLC controllers, a variable topology pipe network and a wireless base station, the variable topology pipe network includes a grid of multiple multi-pass control units, the temperature compensation source, PLC controllers, The wireless base station is respectively connected with the industrial computer; the database server is respectively connected with the real-time induction machine and the fast control machine; the variable topology pipe network is arranged in the dam body. The invention grids the temperature control pipeline of the dam, and arranges sensor groups around the grid nodes, which improves the flexibility and pertinence of the temperature control of the dam; predicts possible unfavorable factors in the temperature control of the dam in advance, and changes the traditional The passive temperature control method is active temperature control, which reduces the uncertainty of dam temperature control.

Description

technical field [0001] The invention belongs to the fields of water conservancy and hydropower project construction and concrete dam project operation temperature control, and in particular relates to a gridded concrete dam temperature control system. Background technique [0002] With the rapid development of my country's national economy, the development of hydropower in areas rich in water resources such as the central east and southwest has gradually become more perfect, and the development and planning of national water conservancy and hydropower projects have shifted to the northwest region. The advancement of technology has made it no longer a problem to build high concrete dams in Northwest China. However, due to the complex climate conditions in Northwest my country, cold and dry winters, and large temperature differences between day and night, the problem of "no dams and no cracks" in concrete dams has become more prominent. . Most of the existing temperature contr...

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Problems solved by technology

However, the water temperature cannot be adjusted at any time. The water source is usually the river water where the project is located. When the water temperature is low, a temperature gradient is likely to occur. Especially for projects in the severe cold regions of Northwest my country, this temperature gradient is larger and the stress generated is also greater.

[0014] (2) The traditional main measure to deal with the cold wave and reduce the internal and external temperature gradient is to cover the insulation layer. This measure passively responds to changes in the external temperature. In the long run, it cannot effectively reduce the temperature stress of the dam body, and the harsh external environment may even lead to surface insulation. Flaking of material

[0015] (3) The existing temperature control technology mainly relies on manual adjustment. Not only does the measurement and manual adjustment have a time lag, but also human factors may cause inaccuracy and miss the best temperature control time.

[0016] (4) The hysteresis of the control nodes of the current temperature control measures needs to be passively controlled after the unfavorable factors affecting the concrete temperature of the dam appear, which is often prone to out-of-control concrete temperature and lacks the foresight of temperature control

[0017] (5) The current temperature control measures cannot target the variability of the temperature field in the dam concrete, and accurately control the temperature of specific parts in a sub-regional and targeted manner

[0018] (6) The current temperature control measures are still mainly passive, and at the same time, more seasonal temperature changes form specific countermeasures, which have a certain lag and lack of predictability and cannot be protected in advance

[0019] (7) The traditional temperature and humidity control range is not accurate enough. Taking temperature control methods as an example, the height of the pouring warehouse section or a lifting warehouse is generally used as a minimum control unit. These control units are affected by external factors (such as water temperature, light) There will also be temperature differences, and the traditional method lacks effective control measures for temperature differences in a smaller range.

The authorized announcement number "ZL 2016 1 1116913.5" discloses the "method and device for permanently regulating the temperature of concrete dams", breaking the traditional method of regulating the temperature of concrete dams, and controlling the feasibility of temperature control of concrete dams from the framework Provides an idea, but for the time being, it only conducts simple verification in the laboratory stage, has not been put into engineering practice, and lacks the means of intelligent regulation

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