CN102720364B - Automatic temperature control process for large-size concrete construction - Google Patents
Automatic temperature control process for large-size concrete construction Download PDFInfo
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- CN102720364B CN102720364B CN201210208681.1A CN201210208681A CN102720364B CN 102720364 B CN102720364 B CN 102720364B CN 201210208681 A CN201210208681 A CN 201210208681A CN 102720364 B CN102720364 B CN 102720364B
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Abstract
The invention discloses an automatic temperature control process for large-size concrete construction. The automatic temperature control process is characterized by comprising the following steps of: (A) laying temperature measuring points according to the temperature control scheme, installing a cooling circulating water pipe, and connecting a temperature sensing element, a flow controller, a water storage tank heating/cooling controller to a temperature control system; (B) testing to determine whether each component works normally and whether a cooling pipe has the problem of water leakage, and debugging the temperature control system; (C) starting concrete placement, inputting constant data (such as die-injection temperature, temperature upper limit and cooling pipe standard flow), observing the display data of the system and maintaining normal operation of the system, and if the concrete surface temperature exceeds the limit, enabling a warning code to appear and taking measures (such as concrete surface coverage); and (D) completing temperature-controlled construction and summing up the record data of the system to form a temperature-controlled construction quality report. The automatic temperature control process has few man-made influence factors, automatically controls the internal and external temperatures of concrete, greatly increases the efficiency and reliability of large-size concrete temperature-controlled construction, and ensures the quality of concrete temperature-controlled construction.
Description
Technical field
The present invention relates to a kind of temperature control technique of concrete construction, especially a kind of temperature automatically controlled technique of mass concrete construction.
Background technology
In recent years, China's infrastructure is flourish, Concrete Design also along with the maximization day by day of engineering structure and swift and violent toward concrete in mass future development.
For the construction of concrete in mass, because its thickness is large, the heat of hydration is large.Therefore mass concrete construction most importantly temperature control, should make that its inner maximum temperature is not more than 75 DEG C, the interior table temperature difference is not more than 25 DEG C.According to the principle of " inside falling outer guarantor ", inside concrete is taked to arrange cooling water pipe and leads to circulating water, concrete outside is taked to cover the measure such as accumulation of heat or water storage and thermal insulation and carries out.Building of concrete in mass should be carried out when temperature is lower, but concrete molding temperature is just not less than 5 DEG C; During the construction of heat phase, must take measures to reduce concrete molding temperature, and its molding temperature should not higher than 28 DEG C.When inside concrete water flowing is lowered the temperature, the temperature difference of turnover saliva is less than or equal to 10 DEG C, and the temperature difference of water temperature and inner concrete is not more than 20 DEG C, and rate of temperature fall is not more than 2 DEG C/d; Utilize the cooling water of discharging in cooling water pipe when the maintenance of top of concrete water storage and thermal insulation, the difference of curing water temperature and surface temperature of concrete is not more than 15 DEG C.
The cumbersome difficulty of conventional temperature-control construction technological operation, artifical influence factor is many, in the sequential production control time long (14 ~ 21 days), slightly follows the tracks of not in place, then can cause great concrete quality accident.
1, the inside concrete crackle caused not in time by lowering the temperature;
2, chapped by the not enough concrete surface caused of insulation;
3, the cooling tube circumferential crack caused by intake-outlet excessive temperature differentials;
4, the full-length cracks of the uneven traversing structures thing caused is fallen by section, is incubated.
Summary of the invention
The object of this invention is to provide a kind of artifical influence factor few, automatic control concrete internal and external temperature; significantly improve high efficiency and the reliability of Temperature Controlling of Mass Concrete construction, guarantee the temperature automatically controlled technique of the mass concrete construction of concrete temperature-control construction quality.
For achieving the above object, the technical solution adopted in the present invention is: a kind of temperature automatically controlled technique of mass concrete construction, comprises the following steps:
A) lay temperature point by temperature control scheme, cool cycles water pipe is installed, and temp-sensing element, flow control valve, storage tank heating radiating control device etc. are connected to temperature control system;
B) constant data such as analog input molding temperature, the maximum temperature upper limit and cooling tube normal flow, whether test each assembly normally works, cooling tube with or without leaking, debugging temperature control system;
C) concreting starts, the constant datas such as input molding temperature, the maximum temperature upper limit and cooling tube normal flow, and observing system shows data and the normality of maintenance system running; If there is surface temperature of concrete overload alarm code to occur, then solved by measures such as concrete surface coverings;
D) temperature-control construction completes, and induction and conclusion system log data forms temperature-control construction quality report.
Preferably, described step C) in comprise:
A) data input before concreting
Input concrete molding temperature, the maximum temperature upper limit and cooling tube normal flow.Molding temperature must not be less than 5 DEG C, and should not be greater than 28 DEG C; Maximum temperature upper limit default setting is 75 DEG C, also can be arranged to the section average temperature peak value calculating gained according to temperature control scheme models for temperature field; Cooling tube normal flow is by the flow in cross section in cooling tube when to be variable-frequency electric water pump run with 50 hertz frequencies, and unit is L/min.
B) temperature control process (scan period of PLCH);
C) temperature control terminates
Formation temperature control achievement Report is summed up according to the Data induction that temperature control process printer represents.
Preferably, described b) in the operation of temperature control process as follows:
B1) concreting starts, and after input data, automatically gathers the data such as the running frequency of temperature, each measuring point temperature of concrete, cooling tube intake-outlet temperature and variable-frequency electric water pump; PLCH calculates the maximum temperature upper limit according to concrete molding temperature, and calculate section average temperature according to formula, the flow of cooling tube recirculated water, export data to display chronologically (sequential in the PLC scan period) show the flow etc. of the maximum temperature upper limit, temperature, concrete each measuring point temperature, each intake-outlet temperature, each section average temperature and each layer cooling tube recirculated water.Printer prints a real time data, prints a secondary data or print on demand afterwards every two hours;
Whether the section average temperature that b2) PLCH goes out n-th layer according to the data operation of PLCn is greater than molding temperature 5 DEG C, if "No", output order, to display reveal codes " Cn ", shows that concrete n-th layer temperature control process does not start; If "Yes", enter next formula;
B3) PLCH goes out surface temperature of concrete according to the data operation of PLCn and whether is greater than 15 DEG C with the temperature difference of atmospheric temperature, if "Yes", namely output order to display shows the code " EP " that transfinites (can increase buzzer, show to need manually to concrete surface covering and heat insulating), enter next formula.If "No", more whether the concrete cross section average temperature of computing n-th layer is less than 15 DEG C with surface temperature of concrete, if "Yes", output order, to display reveal codes " Cn ", shows that concrete n-th layer temperature control process is in controlled range; If "No", enter next formula;
B4) PLCH goes out n-th layer concrete cross section average temperature according to the data operation of PLCn and to be greater than in maximum temperature in limited time, namely output order shows to display the code " En " (can increase buzzer) that transfinites, enter next formula, show to search analyze reason (though reason may be the maximum temperature upper limit arrange be less than 75 DEG C too low; Molding temperature is greater than 28 DEG C and too high; Concrete mix and temperature control scheme are not inconsistent; Concrete raw material and former concrete mix are not inconsistent);
B5) the section average temperature that PLCH goes out n-th layer according to the data operation of PLCn comparatively reduced before two hours, if "No", entered concrete cooling formula, if "Yes", entered concrete insulation formula;
B6) to concrete cooling formula;
B7) to concrete insulation formula.
Preferably, described b6) as follows to concrete cooling formula:
B61) whether 18 DEG C are greater than with the temperature difference of each measuring point in the inside of this layer concrete when PLCH goes out n-th layer cooling tube water inlet water temperature according to the data operation of PLCn, if "No", enter next formula, if "Yes", calculate the n-th layer cooling tube intake-outlet temperature difference again and whether be not more than 0.2 DEG C, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 10 hertz frequencies (i.e. 1/5 normal flow), and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device,
B62) 0.2 DEG C whether is not more than when PLCH goes out the n-th layer cooling tube intake-outlet temperature difference according to the data operation of PLCn, if "No", enter next formula, if "Yes", namely output order to n-th layer flow control valve controls n-th layer variable-frequency electric water pump with 10 hertz frequencies (i.e. 1/5 normal flow) operation to n-th layer cooling tube circulation water flowing;
B63) when PLCH according to the data operation of PLCn go out the n-th layer cooling tube intake-outlet temperature difference whether be greater than 0.2 DEG C be less than or equal to 0.4 DEG C time, if "No", enter next formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 30 hertz frequencies (i.e. 3/5 normal flow);
B64) whether be greater than 0.4 DEG C be less than or equal to 0.6 DEG C when PLCH goes out the n-th layer cooling tube intake-outlet temperature difference according to the data operation of PLCn, if "No", enter next formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 50 hertz frequencies (i.e. 5/5 normal flow);
B65) 0.6 DEG C whether is greater than when PLCH goes out the n-th layer cooling tube intake-outlet temperature difference according to the data operation of PLCn, if "No", terminate formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 50 hertz frequencies (i.e. 5/5 normal flow), and output order controls air-cooled radiator of water tank to recirculated cooling water forced heat radiation to storage tank heating radiating control device.
Preferably, described b7) as follows to concrete insulation formula:
B71) the section average temperature going out n-th layer as PLCH according to the data operation of PLCn is greater than molding temperature 5 DEG C, the temperature difference of n-th layer cooling tube water inlet water temperature and the inner each measuring point of this layer concrete is not more than 18 DEG C, when the n-th layer cooling tube intake-outlet temperature difference is not more than 8 DEG C, and the section average temperature of this layer is less than 0.2 DEG C compared with whether reducing before two hours, if "No", enter next formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 30 hertz frequencies (i.e. 3/5 normal flow),
B72) comparatively 0.2 ~ 0.3 DEG C whether was reduced before two hours when PLCH to go out n-th layer section average temperature according to the data operation of PLCn, if "No", enter next formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 10 hertz frequencies (i.e. 1/5 normal flow);
B73) comparatively 0.3 ~ 0.4 DEG C whether was reduced before two hours when PLCH to go out n-th layer section average temperature according to the data operation of PLCn, if "No", enter next formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 0 hertz frequency (namely quitting work);
B74) whether be greater than 0.4 DEG C be less than or equal to 0.6 DEG C when PLCH goes out the n-th layer cooling tube intake-outlet temperature difference according to the data operation of PLCn, if "No", enter next formula, if "Yes", namely the output order variable-frequency electric water pump that controls n-th layer to n-th layer flow control valve with 50 hertz frequencies (i.e. 5/5 normal flow) run according to the data operation of PLCn n-th layer goes out as PLCH to n-th layer cooling tube circulation water flowing section average temperature compared with two hours before whether reduce by 0.4 ~ 0.5 DEG C, if "No", enter next formula, if "Yes", namely output order to n-th layer flow control valve controls n-th layer variable-frequency electric water pump with 10 hertz frequencies (i.e. 1/5 normal flow) operation to this layer of cooling tube circulation water flowing, and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device,
Whether the section average temperature b75) going out n-th layer according to the data operation of PLCn as PLCH comparatively reduced by 0.5 ~ 0.6 DEG C before two hours, if "No", enter next formula, if "Yes", namely output order to n-th layer flow control valve controls n-th layer variable-frequency electric water pump with 30 hertz frequencies (i.e. 3/5 normal flow) operation to this layer of cooling tube circulation water flowing, and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device;
Whether the section average temperature b76) going out n-th layer as PLCH according to the data operation of PLCn comparatively reduces by more than 0.6 DEG C in two hours, if "No", terminate formula, if "Yes", namely output order to n-th layer flow control valve controls n-th layer variable-frequency electric water pump with 50 hertz frequencies (i.e. 5/5 normal flow) operation to this layer of cooling tube circulation water flowing, and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device.
Adopt temperature control process of the present invention, utilize PLC(programmable logic controller (PLC)) automated control technology, by the collection of temperature control data, through the computing of PLC formula, and then controlled cooling model pipe flow and inflow temperature, reach the object of temperature control automation.Guarantee when carrying out Temperature Controlling of Mass Concrete construction; without the need to destroying concrete self structure; can judge according to set temperature control scheme automatic data collection and then automatically implement temperature control measures simultaneously; easily and accurately complete temperature-control construction task; significantly improve high efficiency and the reliability of Temperature Controlling of Mass Concrete construction, guarantee concrete temperature-control construction quality.Solve that temperature control process relies on manually for a long time, the construction difficult problem such as cooling water pipe flow and water temperature cannot regulate as required automatically.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Fig. 1 is present invention process flow chart;
Fig. 2 is present system workflow diagram.
Detailed description of the invention
System and device of the present invention is made up of central PLC processing module and each layering temperature control processing module.Central authorities' PLC processing module is by constant data loader, central PLC(code name PLCH), the assembly such as display, printer forms; Layering temperature control processing module is natural number by concrete temp-sensing element, Inlet and outlet water temp-sensing element, temperature data acquisition device (A/D converter), PLC(code name PLCn, n), the assembly composition such as flow control valve, storage tank heating radiating control device.
1, constant data loader
Constant data can be input to the equipment of PLC.Constant data mainly contains molding temperature, the maximum temperature upper limit and cooling tube normal flow etc.
2, concrete temp-sensing element
Measure the element of concrete real time temperature.The exportable data of main collection are atmospheric temperature, concrete side surface temperature, concrete top surface temperature, each layer measuring point temperature etc.Gather the data obtained and output to temperature data acquisition device (A/D converter), data transfer signal is thermo-electromotive force signal.
3, Inlet and outlet water temp-sensing element
Measure the element importing and exporting cooling water temperature.The exportable data of main collection are each layer cooling water pipe water inlet temperature etc.Gather the data obtained and output to temperature data acquisition device (A/D converter), data transfer signal is thermo-electromotive force signal.
4, temperature data acquisition device (A/D converter)
The thermo-electromotive force signal that temp-sensing element can be gathered converts the instrument of data signal to, to meet PLC(programmable logic controller) signal pattern of the input.
5, PLC(programmable logic controller)
Programmable logic controller (PLC) (Programmable Logic Controller, be called for short PLC), there is a numerical digit electronic equipment for microprocessor, for the numerical digit logic controller of Automated condtrol, control instruction can be loaded at any time in internal memory and store and perform.Be mainly used in the data gathered according to temp-sensing element, according to logic formula (the section average temperature calculating of input in advance, temperature-controlled conditions etc.), through computing, export operation result, so control the flow of cooling (insulation) water in temperature control cooling tube, the warning of data over run, the display of normal data store printing etc.
6, flow control valve
According to the output signal of PLC, the controller cooling (insulation) discharge in each layer cooling tube can be regulated.
7, storage tank heating radiating control device:
When PLC judges by regulating the flow of cooling tube can not change the operating mode such as cooling tube intake-outlet temperature over-range, the concrete cross section maximum temperature upper limit according to formula time, can according to the output signal of PLC, control heating or the heat dissipation equipment of storage tank, regulate the inflow temperature of cooling tube.
8, display screen, printer
According to the output signal of PLC, display screen show in real time arrange chronologically temperature, concrete each measuring point temperature, each layer turnover water temperature, overload alarm code etc., printer can the above data of real time print, also available Mobile Data memory device.
Shown in Fig. 1 and 2, the temperature automatically controlled technique of mass concrete construction of the present invention, comprises the following steps:
A) lay temperature point by temperature control scheme, cool cycles water pipe is installed, and temp-sensing element, flow control valve, storage tank heating radiating control device etc. are connected to temperature control system;
B) constant data such as analog input molding temperature, the maximum temperature upper limit and cooling tube normal flow, whether test each assembly normally works, cooling tube with or without leaking, debugging temperature control system;
C) concreting starts, the constant datas such as input molding temperature, the maximum temperature upper limit and cooling tube normal flow, and observing system shows data and the normality of maintenance system running; If there is surface temperature of concrete overload alarm code to occur, then solved by measures such as concrete surface coverings;
D) temperature-control construction completes, and induction and conclusion system log data forms temperature-control construction quality report.
1, data input before concreting
Input concrete molding temperature, the maximum temperature upper limit and cooling tube normal flow.Molding temperature must not be less than 5 DEG C, and should not be greater than 28 DEG C; Maximum temperature upper limit default setting is 75 DEG C, also can be arranged to the section average temperature peak value calculating gained according to temperature control scheme models for temperature field; Cooling tube normal flow is by the flow in cross section in cooling tube when to be variable-frequency electric water pump run with 50 hertz frequencies, and unit is L/min.
2, temperature control process (scan period of PLCH)
A, concreting start, and after input data, automatically gather the data such as the running frequency of temperature, each measuring point temperature of concrete, cooling tube intake-outlet temperature and variable-frequency electric water pump.PLCH calculates the maximum temperature upper limit according to concrete molding temperature, and calculate section average temperature according to formula, the flow of cooling tube recirculated water, export data to display chronologically (sequential in the PLC scan period) show the flow etc. of the maximum temperature upper limit, temperature, concrete each measuring point temperature, each intake-outlet temperature, each section average temperature and each layer cooling tube recirculated water.Printer prints a real time data, prints a secondary data or print on demand afterwards every two hours.
Whether the section average temperature that B, PLCH go out n-th layer according to the data operation of PLCn is greater than molding temperature 5 DEG C, if "No", output order, to display reveal codes " Cn ", shows that concrete n-th layer temperature control process does not start.If "Yes", enter next formula.
C, PLCH go out surface temperature of concrete according to the data operation of PLCn and whether are greater than 15 DEG C with the temperature difference of atmospheric temperature, if "Yes", namely output order to display shows the code " EP " that transfinites (can increase buzzer, show to need manually to concrete surface covering and heat insulating), enters next formula.If "No", more whether the concrete cross section average temperature of computing n-th layer is less than 15 DEG C with surface temperature of concrete, if "Yes", output order, to display reveal codes " Cn ", shows that concrete n-th layer temperature control process is in controlled range.If "No", enter next formula.
D, PLCH go out n-th layer concrete cross section average temperature according to the data operation of PLCn and to be greater than in maximum temperature in limited time, namely output order shows to display the code " En " (can increase buzzer) that transfinites, enter next formula, show to search analyze reason (though reason may be the maximum temperature upper limit arrange be less than 75 DEG C too low; Molding temperature is greater than 28 DEG C and too high; Concrete mix and temperature control scheme are not inconsistent; Concrete raw material and former concrete mix are not inconsistent).
The section average temperature that E, PLCH go out n-th layer according to the data operation of PLCn comparatively reduced before two hours, if "No", entered concrete cooling formula, if "Yes", entered concrete insulation formula.
F, to concrete cooling formula
1) whether 18 DEG C are greater than with the temperature difference of each measuring point in the inside of this layer concrete when PLCH goes out n-th layer cooling tube water inlet water temperature according to the data operation of PLCn, if "No", enter next formula, if "Yes", calculate the n-th layer cooling tube intake-outlet temperature difference again and whether be not more than 0.2 DEG C, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 10 hertz frequencies (i.e. 1/5 normal flow), and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device.
2) 0.2 DEG C whether is not more than when PLCH goes out the n-th layer cooling tube intake-outlet temperature difference according to the data operation of PLCn, if "No", enter next formula, if "Yes", namely output order to n-th layer flow control valve controls n-th layer variable-frequency electric water pump with 10 hertz frequencies (i.e. 1/5 normal flow) operation to n-th layer cooling tube circulation water flowing.
3) when PLCH according to the data operation of PLCn go out the n-th layer cooling tube intake-outlet temperature difference whether be greater than 0.2 DEG C be less than or equal to 0.4 DEG C time, if "No", enter next formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 30 hertz frequencies (i.e. 3/5 normal flow).
4) whether be greater than 0.4 DEG C be less than or equal to 0.6 DEG C when PLCH goes out the n-th layer cooling tube intake-outlet temperature difference according to the data operation of PLCn, if "No", enter next formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 50 hertz frequencies (i.e. 5/5 normal flow).
5) 0.6 DEG C whether is greater than when PLCH goes out the n-th layer cooling tube intake-outlet temperature difference according to the data operation of PLCn, if "No", terminate formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 50 hertz frequencies (i.e. 5/5 normal flow), and output order controls air-cooled radiator of water tank to recirculated cooling water forced heat radiation to storage tank heating radiating control device.
G, to concrete insulation formula
A) the section average temperature going out n-th layer as PLCH according to the data operation of PLCn is greater than molding temperature 5 DEG C, the temperature difference of n-th layer cooling tube water inlet water temperature and the inner each measuring point of this layer concrete is not more than 18 DEG C, when the n-th layer cooling tube intake-outlet temperature difference is not more than 8 DEG C, and the section average temperature of this layer is less than 0.2 DEG C compared with whether reducing before two hours, if "No", enter next formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 30 hertz frequencies (i.e. 3/5 normal flow).
B) comparatively 0.2 ~ 0.3 DEG C whether was reduced before two hours when PLCH to go out n-th layer section average temperature according to the data operation of PLCn, if "No", enter next formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 10 hertz frequencies (i.e. 1/5 normal flow).
C) comparatively 0.3 ~ 0.4 DEG C whether was reduced before two hours when PLCH to go out n-th layer section average temperature according to the data operation of PLCn, if "No", enter next formula, if "Yes", namely output order runs n-th layer cooling tube circulation water flowing to the variable-frequency electric water pump of n-th layer flow control valve control n-th layer with 0 hertz frequency (namely quitting work).
Whether the section average temperature d) going out n-th layer according to the data operation of PLCn as PLCH comparatively reduced by 0.4 ~ 0.5 DEG C before two hours, if "No", enter next formula, if "Yes", namely output order to n-th layer flow control valve controls n-th layer variable-frequency electric water pump with 10 hertz frequencies (i.e. 1/5 normal flow) operation to this layer of cooling tube circulation water flowing, and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device.
Whether the section average temperature e) going out n-th layer according to the data operation of PLCn as PLCH comparatively reduced by 0.5 ~ 0.6 DEG C before two hours, if "No", enter next formula, if "Yes", namely output order to n-th layer flow control valve controls n-th layer variable-frequency electric water pump with 30 hertz frequencies (i.e. 3/5 normal flow) operation to this layer of cooling tube circulation water flowing, and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device.
Whether the section average temperature f) going out n-th layer as PLCH according to the data operation of PLCn comparatively reduces by more than 0.6 DEG C in two hours, if "No", terminate formula, if "Yes", namely output order to n-th layer flow control valve controls n-th layer variable-frequency electric water pump with 50 hertz frequencies (i.e. 5/5 normal flow) operation to this layer of cooling tube circulation water flowing, and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device.
3, temperature control terminates
Formation temperature control achievement Report is summed up according to the Data induction that temperature control process printer represents.
The above is the preferred embodiment of the present invention; certainly the interest field of the present invention can not be limited with this; should be understood that; for those skilled in the art; technical scheme of the present invention is modified or equivalent replacement, do not depart from the protection domain of technical solution of the present invention.
Claims (3)
1. a temperature automatically controlled technique for mass concrete construction, is characterized in that comprising the following steps:
A) lay temperature point by temperature control scheme, cool cycles water pipe is installed, and temp-sensing element, flow control valve, storage tank heating radiating control device are connected to temperature control system;
Whether B) the constant data of analog input molding temperature, the maximum temperature upper limit and cooling tube normal flow, test each assembly and normally work, and cooling tube, with or without leaking, debugs temperature control system;
C) concreting starts, the constant data of input molding temperature, the maximum temperature upper limit and cooling tube normal flow, and observing system shows data and the normality of maintenance system running; If there is surface temperature of concrete overload alarm code to occur, then the measure covered by concrete surface is solved;
D) temperature-control construction completes, and induction and conclusion system log data forms temperature-control construction quality report;
Wherein said step C) in comprise:
A) data input before concreting
Input concrete molding temperature, the maximum temperature upper limit and cooling tube normal flow, molding temperature must not be less than 5 DEG C, and not
28 DEG C should be greater than; Maximum temperature upper limit default setting is 75 DEG C, also can be arranged to calculate gained according to temperature control scheme models for temperature field
Section average temperature peak value; Cooling tube normal flow is that variable-frequency electric water pump passes through cooling tube with during 50 hertz frequencies operation
The flow in interior cross section, unit is L/min;
B) temperature control process, a scan period of PLC;
C) temperature control terminates
Formation temperature control achievement Report is summed up according to the Data induction that temperature control process printer represents;
Wherein said b) in the operation of temperature control process as follows:
B1) concreting starts, and after input data, automatically gathers the data of temperature, each measuring point temperature of concrete, cooling tube intake-outlet temperature and variable-frequency electric water pump operation frequency; PLC calculates the maximum temperature upper limit according to concrete molding temperature, and calculate section average temperature according to formula, the flow of cooling tube recirculated water, export data to display chronologically, the flow of the sequential display maximum temperature upper limit, temperature, concrete each measuring point temperature, each intake-outlet temperature, each section average temperature and each layer cooling tube recirculated water in the PLC scan period; Printer prints a real time data, prints afterwards every two hours
One secondary data or print on demand;
Whether the section average temperature that b2) PLC goes out n-th layer according to the data operation of PLC is greater than molding temperature 5 DEG C, if "No", output order, to display reveal codes " Cn ", shows that concrete n-th layer of temperature control process does not start; If "Yes", enter next formula;
B3) PLC goes out surface temperature of concrete according to the data operation of PLC and whether is greater than 15 DEG C with the temperature difference of atmospheric temperature, if "Yes", namely output order shows to display the code " EP " that transfinites, and showing needs, manually to concrete surface covering and heat insulating, enter next formula; If "No", more whether the concrete cross section average temperature of computing n-th layer is less than 15 DEG C with surface temperature of concrete, if "Yes", output order, to display reveal codes " Cn ", shows that concrete n-th layer of temperature control process is in controlled range; If "No", enter next formula;
B4) PLC goes out the n-th layer concrete section average temperature according to the data operation of PLC and to be greater than in maximum temperature in limited time, namely output order shows to display the code " En " that transfinites, enter next formula, show to search analysis reason, though reason may be the maximum temperature upper limit arrange be less than 75 DEG C too low; Molding temperature is greater than 28 DEG C and too high; Concrete mix and temperature control scheme are not inconsistent; Concrete raw material and former concrete mix are not inconsistent;
B5) the section average temperature that PLC goes out n-th layer according to the data operation of PLC comparatively reduced before two hours, if "No", entered concrete cooling formula, if "Yes", entered concrete insulation formula;
B6) to concrete cooling formula;
B7) to concrete insulation formula.
2., according to the temperature automatically controlled technique of mass concrete construction described in claim 1, it is characterized in that described b6) as follows to concrete cooling formula:
B61) whether 18 DEG C are greater than with the temperature difference of each measuring point in the inside of this layer concrete when PLC goes out n-th layer of cooling tube water inlet water temperature according to the data operation of PLC, if "No", enter next formula, if "Yes", calculate n-th layer of cooling tube intake-outlet temperature difference again and whether be not more than 0.2 DEG C, if "Yes", namely output order to the n-th laminar flow amount controller controls the variable-frequency electric water pump of n-th layer with 10 hertz frequencies, i.e. 1/5 normal flow, run n-th layer of cooling tube circulation water flowing, and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device,
B62) 0.2 DEG C whether is not more than when PLC goes out n-th layer of cooling tube intake-outlet temperature difference according to the data operation of PLC, if "No", enter next formula, if "Yes", namely output order to the n-th laminar flow amount controller controls n-th layer of variable-frequency electric water pump with 10 hertz frequencies, i.e. 1/5 normal flow, runs n-th layer of cooling tube circulation water flowing;
B63) when PLC according to the data operation of PLC go out n-th layer of cooling tube intake-outlet temperature difference whether be greater than 0.2 DEG C be less than or equal to 0.4 DEG C time, if "No", enter next formula, if "Yes", namely output order to the n-th laminar flow amount controller controls the variable-frequency electric water pump of n-th layer with 30 hertz frequencies, i.e. 3/5 normal flow, runs n-th layer of cooling tube circulation water flowing; B64) whether be greater than 0.4 DEG C be less than or equal to 0.6 DEG C when PLC goes out n-th layer of cooling tube intake-outlet temperature difference according to the data operation of PLC, if "No", enter next formula, if "Yes", namely output order to the n-th laminar flow amount controller controls the variable-frequency electric water pump of n-th layer with 50 hertz frequencies, i.e. 5/5 normal flow, runs n-th layer of cooling tube circulation water flowing;
B65) 0.6 DEG C whether is greater than when PLC goes out n-th layer of cooling tube intake-outlet temperature difference according to the data operation of PLC, if "No", terminate formula, if "Yes", namely output order to the n-th laminar flow amount controller controls the variable-frequency electric water pump of n-th layer with 50 hertz frequencies, i.e. 5/5 normal flow, runs n-th layer of cooling tube circulation water flowing, and output order controls air-cooled radiator of water tank to recirculated cooling water forced heat radiation to storage tank heating radiating control device.
3., according to the temperature automatically controlled technique of mass concrete construction described in claim 1, it is characterized in that described b7) as follows to concrete insulation formula:
B71) the section average temperature going out n-th layer as PLC according to the data operation of PLC is greater than molding temperature 5 DEG C, the temperature difference of n-th layer cooling tube water inlet water temperature and the inner each measuring point of this layer concrete is not more than 18 DEG C, when n-th layer of cooling tube intake-outlet temperature difference is not more than 8 DEG C, and the section average temperature of this layer is less than 0.2 DEG C compared with whether reducing before two hours, if "No", enter next formula, if "Yes", namely output order to the n-th laminar flow amount controller controls the variable-frequency electric water pump of n-th layer with 30 hertz frequencies, i.e. 3/5 normal flow, run n-th layer of cooling tube circulation water flowing,
B72) comparatively 0.2 ~ 0.3 DEG C whether was reduced before two hours when PLC to go out n-th layer of section average temperature according to the data operation of PLC, if "No", enter next formula, if "Yes", namely output order to the n-th laminar flow amount controller controls the variable-frequency electric water pump of n-th layer with 10 hertz frequencies, i.e. 1/5 normal flow, runs n-th layer of cooling tube circulation water flowing;
B73) comparatively 0.3 ~ 0.4 DEG C whether was reduced before two hours when PLC to go out n-th layer of section average temperature according to the data operation of PLC, if "No", enter next formula, if "Yes", namely output order to the n-th laminar flow amount controller controls the variable-frequency electric water pump of n-th layer with 0 hertz frequency, namely quit work, run n-th layer of cooling tube circulation water flowing;
B74) whether be greater than 0.4 DEG C be less than or equal to 0.6 DEG C when PLC goes out n-th layer of cooling tube intake-outlet temperature difference according to the data operation of PLC, if "No", enter next formula, if "Yes", namely output order to the n-th laminar flow amount controller controls the variable-frequency electric water pump of n-th layer with 50 hertz frequencies, i.e. 5/5 normal flow, run n-th layer gone out as PLC to n-th layer of cooling tube circulation water flowing section average temperature according to the data operation of PLC and comparatively whether reduce by 0.4 ~ 0.5 DEG C before two hours, if "No", enter next formula, if "Yes", namely output order to the n-th laminar flow amount controller controls n-th layer of variable-frequency electric water pump with 10 hertz frequencies, i.e. 1/5 normal flow, run this layer of cooling tube circulation water flowing, and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device,
Whether the section average temperature b75) going out n-th layer according to the data operation of PLC as PLC comparatively reduced by 0.5 ~ 0.6 DEG C before two hours, if "No", enter next formula, if "Yes", namely output order to the n-th laminar flow amount controller controls n-th layer of variable-frequency electric water pump with 30 hertz frequencies, i.e. 3/5 normal flow, runs this layer of cooling tube circulation water flowing, and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device;
Whether the section average temperature b76) going out n-th layer as PLC according to the data operation of PLC comparatively reduces by more than 0.6 DEG C in two hours, if "No", terminate formula, if "Yes", namely output order to the n-th laminar flow amount controller controls n-th layer of variable-frequency electric water pump with 50 hertz frequencies, i.e. 5/5 normal flow, runs this layer of cooling tube circulation water flowing, and output order controls heater water tank to recirculated cooling water pressure heating to storage tank heating radiating control device.
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| CN102979307B (en) * | 2012-12-12 | 2016-04-13 | 新疆生产建设兵团金来建设工程技术研发有限责任公司 | A kind of Temperature-controllcrack crack prevention construction method for concrete structure |
| CN103485542A (en) * | 2013-09-25 | 2014-01-01 | 中铁大桥局股份有限公司 | System and method for measuring and controlling hydration heat in mass concrete |
| CN103526761B (en) * | 2013-10-24 | 2015-05-20 | 中国一冶集团有限公司 | Large-sized concrete automatic temperature control and maintenance device and method |
| CN103741692B (en) * | 2013-12-23 | 2016-01-13 | 中国水利水电科学研究院 | A kind of intelligent water communication method of mass concrete and the system of use the method |
| CN104563514B (en) * | 2014-12-05 | 2017-01-25 | 中交一航局第三工程有限公司 | Large-volume concrete circulation cooling system |
| CN106368442B (en) * | 2016-08-30 | 2018-08-28 | 武汉源锦商品混凝土有限公司 | A kind of concrete exterior wall intelligence curing system |
| CN108049644B (en) * | 2017-11-24 | 2020-09-08 | 中国建筑第八工程局有限公司 | Large-volume concrete double-condensing loop temperature control equipment and temperature control method thereof |
| CN111221361B (en) * | 2018-11-27 | 2021-08-31 | 河北高达智能装备股份有限公司 | Temperature control method for mass concrete construction |
| CN113048699B (en) * | 2021-05-13 | 2022-04-19 | 中国水利水电第九工程局有限公司 | Dam concrete water cooling process and device in high altitude cold region |
| CN114564054B (en) * | 2022-03-07 | 2023-01-17 | 三峡大学 | Intelligent temperature control method, system, equipment and storage medium for mass concrete |
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