CN105486712A - Method for simulation of fire hazard heating process - Google Patents
Method for simulation of fire hazard heating process Download PDFInfo
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- CN105486712A CN105486712A CN201510835956.8A CN201510835956A CN105486712A CN 105486712 A CN105486712 A CN 105486712A CN 201510835956 A CN201510835956 A CN 201510835956A CN 105486712 A CN105486712 A CN 105486712A
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- temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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Abstract
The invention discloses a method for simulation of a fire hazard heating process. The method comprises a manual control method and an automatic control method. A programmable logic controller (PLC) carries out control. Through a central control chamber, a PLC programming device and a burner in the furnace, a fire hazard heating process is realized. The central control chamber controls the PLC programming device. The PLC programming device controls the burner in the furnace. Temperature and pressure data information in the furnace is returned to the PLC programming device. The PLC programming device feeds the information back to the central control chamber. The whole control system realizes automatic and hand-operated operation, is free of operator operation nearby a test furnace and guarantees people safety.
Description
Technical field
The present invention relates to a kind of method of simulated fire temperature-rise period, belong to electronic technology field.
Background technology
Building fire increasing, makes people more and more keep a close eye on the performance change of building element under fire effect and consequent harm. and how to study test member fire performance, become the important topic of civil engineering work subject.
Fire Furnace is utilized to be one of Main Means of adopting of various countries to study component fire performance.According to building element fire testing method (GB/T9978.18-2008), Fire Furnace can adopt light diesel fuel, rock gas, coal gas or liquefied gas as fuel.The air that fuel is sent here to nozzle and high pressure blower by Cemented filling by store oil (gas) tank mixes, and sprays into trial furnace combustion.The flue gas that burning produces to be entered after environmental protection equipment through plate between flue by flue and discharges.Fire performance test should adopt open firing trial furnace, makes test specimen be subject to the high temperature action similar to actual fire.
There is following shortcoming in current fire test:
1, the temperature control mode of combustion control system is manually, needs to accumulate the control mode that long operating experience could grasp temperature rise in stove;
2, the security consideration of combustion control system is inconsiderate, and the security of equipment relies on artificial operation too much, there is certain potential safety hazard.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned deficiency, a kind of method of simulated fire temperature-rise period is provided, have and can a whole set of control system can realize automatically and manual two kinds of mode of operations, and do not need in experimentation to operate near operating personnel to trial furnace, ensure the advantage of the safety of personnel.
For overcoming the above problems, the present invention is by the following technical solutions: a kind of method method of simulated fire temperature-rise period, the method comprises hand operated control method and autocontrol method, programmable logic controller (PLC) is adopted to control, realized by the burner in central control room, PLC programmable device, body of heater, central control room control PLC programmable device, PLC programmable device controls the burner in body of heater, temperature and pressure data message in body of heater returns to PLC programmable device, PLC programmable device again information feed back to central control room.
Further, this control method comprises the following steps:
Start from step S101, before simulated fire elevated temperature test, need the switch board of system to power on, fuel used valve open also checks the whether sufficient and No leakage of fuel, upper computer software computer used is opened, and software enters running status, enters step S102 after completing.
Further, this control method is further comprising the steps of:
Step S102, is arranged the operational factor of this test, selects heating curve, selects to control manually or automatically, enters step S103 after completing.
Step S103, starts one by one by the blower fan of burner, and air exhauster starts, and checks ruuning situation.Step S104 is entered after all normal.
Further, this control method is further comprising the steps of:
Step S104, clicks the start button of software picture, and the experiment of simulated fire temperature-rise period starts, and theoretical temperatures calculates automatically according to international standard ISO834 curve, enters step S105 after completing.
Further, this control method is further comprising the steps of:
Step S105, judges whether temperature in furnace and theoretical temperatures meet, if the temperature difference of temperature in furnace and theoretical temperatures is within positive and negative 10 ° of C, then the burner igniting at this temperature acquisition place, enters step S106 after completing; If internal temperature is higher than theoretical temperatures 10 ° of more than C, then need the combustion gas of burner/oily valve closing, the burner at this temperature acquisition place stops flame, and re-executes step S105.
Further, this control method is further comprising the steps of:
Step S106, judge burner hearth internal pressure whether in normal range, general burner hearth internal pressure takes from the mean pressure at below furnace roof 20cm place, and the requirement of control is 20pa; If burner hearth internal pressure is higher than 20pa, then needs control system after PID arithmetic, automatically strengthen the running frequency of air exhauster, thus furnace pressure is dropped in setting range, then return execution step S106; If burner hearth inside pressure not higher than 20pa, then enters step S107.
Further, this control method is further comprising the steps of:
Step S107, judges whether intensification burner used has warning, if report to the police, then enters step S109; If do not report to the police, then burner controls automatically according to the difference of actual temperature and theoretical temperatures, enters step S108 after completing.
Further, this control method is further comprising the steps of:
In step S108, according to the object of test, whether the fire performance of test specimen has reached fire endurance to judge whether this test completes; If test specimen reaches fire endurance, then enter step S109, if test specimen does not reach fire endurance, then return and perform step S105.
Further, this control method is further comprising the steps of:
Step S109, click software picture stop button, theoretical temperatures is down to room temperature, and burner stops flame, enters step S110 after completing;
Step S110, after test stops, in-furnace temperature is still very high, now judges whether in-furnace temperature drops to below safe temperature, if no, then burner blower works on, and continues descent of temperature, and re-executing step S110, in-furnace temperature is down to after below safe temperature, enters step S111.
Further, this control method is further comprising the steps of:
Step S111, system stops burner blower work automatically, enters step S112 after completing;
Step S112, system stalls.
The present invention adopts above technical scheme, with prior art ratio, has the following advantages:
1, a whole set of control system can realize automatic and manual two kinds of mode of operations;
2, automatization level improves, and reduces manual operation 90% workload.In experimentation, operating personnel complete all test operations in pulpit, and need not enter near trial furnace again, security performance improves greatly;
3, by S type thermopair, furnace temperature is gathered, and by data feedback in PLC control system, controlled the start and stop of burner by PLC control system, reach accurate temperature controlling;
4, temperature control is more accurate, and the normal temperature rise period, this method actual temperature differs with theoretical temperatures within the scope of ± 10 ° of C, and artificially controlling temperature precision is greatly about ± 30 ~ 50 ° of C.
Below in conjunction with drawings and Examples, the present invention will be further described.
Accompanying drawing explanation
Accompanying drawing 1 is control method schematic diagram in the embodiment of the present invention;
Accompanying drawing 2 is the flow chart of steps of control method in the embodiment of the present invention.
Embodiment
Embodiment, as shown in Figure 1 and Figure 2, a kind of simulated fire temperature-rise period control method, this control method comprises hand operated control method and autocontrol method, adopts programmable logic controller (PLC) to control, is realized by the burner in central control room, PLC programmable device, body of heater, central control room control PLC programmable device, PLC programmable device controls the burner in body of heater, and the temperature and pressure data message in body of heater returns to PLC programmable device, PLC programmable device again information feed back to central control room.
This control method comprises the following steps:
Start from step S101, before simulated fire elevated temperature test, need the switch board of system to power on, fuel used valve open also checks the whether sufficient and No leakage of fuel, upper computer software computer used is opened, and software enters running status, enters step S102 after completing;
Step S102, is arranged the operational factor of this test, selects heating curve, selects to control manually or automatically, enters step S103 after completing;
Step S103, starts one by one by the blower fan of burner, and air exhauster starts, and checks ruuning situation.Step S104 is entered after all normal;
Step S104, clicks the start button of software picture, and the experiment of simulated fire temperature-rise period starts, and theoretical temperatures calculates automatically according to international standard ISO834 curve, enters step S105 after completing;
Step S105, judges whether temperature in furnace and theoretical temperatures meet, if the temperature difference of temperature in furnace and theoretical temperatures is within positive and negative 10 ° of C, then the burner igniting at this temperature acquisition place, enters step S106 after completing; If internal temperature is higher than theoretical temperatures 10 ° of more than C, then need the combustion gas of burner/oily valve closing, the burner at this temperature acquisition place stops flame, and re-executes step S105;
Step S106, judge burner hearth internal pressure whether in normal range, general burner hearth internal pressure takes from the mean pressure at below furnace roof 20cm place, and the requirement of control is 20pa; If burner hearth internal pressure is higher than 20pa, then needs control system after PID arithmetic, automatically strengthen the running frequency of air exhauster, thus furnace pressure is dropped in setting range, then return execution step S106; If burner hearth inside pressure not higher than 20pa, then enters step S107;
Step S107, judges whether intensification burner used has warning, if report to the police, then enters step S109; If do not report to the police, then burner controls automatically according to the difference of actual temperature and theoretical temperatures, enters step S108 after completing.
In step S108, according to the object of test, whether the fire performance of test specimen has reached fire endurance to judge whether this test completes; If test specimen reaches fire endurance, then enter step S109, if test specimen does not reach fire endurance, then return and perform step S105;
Step S109, click software picture stop button, theoretical temperatures is down to room temperature, and burner stops flame, enters step S110 after completing;
Step S110, after test stops, in-furnace temperature is still very high, now judges whether in-furnace temperature drops to below safe temperature, if no, then burner blower works on, and continues descent of temperature, and re-executing step S110, in-furnace temperature is down to after below safe temperature, enters step S111;
Step S111, system stops burner blower work automatically, enters step S112 after completing;
Step S112, system stalls.
The above is the citing of best mode for carrying out the invention, and the part wherein do not addressed in detail is the common practise of those of ordinary skill in the art.Protection scope of the present invention is as the criterion with the content of claim, and any equivalent transformation carried out based on technology enlightenment of the present invention, also within protection scope of the present invention.
Claims (10)
1. the method for a simulated fire temperature-rise period, it is characterized in that: the method comprises hand operated control method and autocontrol method, programmable logic controller (PLC) is adopted to control, realized by the burner in central control room, PLC programmable device, body of heater, central control room control PLC programmable device, PLC programmable device controls the burner in body of heater, and the temperature and pressure data message in body of heater returns to PLC programmable device, PLC programmable device again information feed back to central control room.
2. the method for a kind of simulated fire temperature-rise period as claimed in claim 1, is characterized in that: this control method comprises the following steps:
Start from step S101, before simulated fire elevated temperature test, need the switch board of system to power on, fuel used valve open also checks the whether sufficient and No leakage of fuel, upper computer software computer used is opened, and software enters running status, enters step S102 after completing.
3. the method for a kind of simulated fire temperature-rise period as claimed in claim 1, is characterized in that: this control method is further comprising the steps of:
Step S102, is arranged the operational factor of this test, selects heating curve, selects to control manually or automatically, enters step S103 after completing;
Step S103, starts one by one by the blower fan of burner, and air exhauster starts, and checks ruuning situation, enters step S104 after all normal.
4. the method for a kind of simulated fire temperature-rise period as claimed in claim 1, is characterized in that: this control method is further comprising the steps of:
Step S104, clicks the start button of software picture, and the experiment of simulated fire temperature-rise period starts, and theoretical temperatures calculates automatically according to international standard ISO834 curve, enters step S105 after completing.
5. the method for a kind of simulated fire temperature-rise period as claimed in claim 1, is characterized in that: this control method is further comprising the steps of:
Step S105, judges whether temperature in furnace and theoretical temperatures meet, if the temperature difference of temperature in furnace and theoretical temperatures is within positive and negative 10 ° of C, then the burner igniting at this temperature acquisition place, enters step S106 after completing; If internal temperature is higher than theoretical temperatures 10 ° of more than C, then need the combustion gas of burner/oily valve closing, the burner at this temperature acquisition place stops flame, and re-executes step S105.
6. the method for a kind of simulated fire temperature-rise period as claimed in claim 1, is characterized in that: this control method is further comprising the steps of:
Step S106, judge burner hearth internal pressure whether in normal range, general burner hearth internal pressure takes from the mean pressure at below furnace roof 20cm place, and the requirement of control is 20pa; If burner hearth internal pressure is higher than 20pa, then needs control system after PID arithmetic, automatically strengthen the running frequency of air exhauster, thus furnace pressure is dropped in setting range, then return execution step S106; If burner hearth inside pressure not higher than 20pa, then enters step S107.
7. the method for a kind of simulated fire temperature-rise period as claimed in claim 1, is characterized in that: this control method is further comprising the steps of:
Step S107, judges whether intensification burner used has warning, if report to the police, then enters step S109; If do not report to the police, then burner controls automatically according to the difference of actual temperature and theoretical temperatures, enters step S108 after completing.
8. the method for a kind of simulated fire temperature-rise period as claimed in claim 1, is characterized in that: this control method is further comprising the steps of:
In step S108, according to the object of test, whether the fire performance of test specimen has reached fire endurance to judge whether this test completes; If test specimen reaches fire endurance, then enter step S109, if test specimen does not reach fire endurance, then return and perform step S105.
9. the method for a kind of simulated fire temperature-rise period as claimed in claim 1, is characterized in that: this control method is further comprising the steps of:
Step S109, click software picture stop button, theoretical temperatures is down to room temperature, and burner stops flame, enters step S110 after completing;
Step S110, after test stops, in-furnace temperature is still very high, now judges whether in-furnace temperature drops to below safe temperature, if no, then burner blower works on, and continues descent of temperature, and re-executing step S110, in-furnace temperature is down to after below safe temperature, enters step S111.
10. the method for a kind of simulated fire temperature-rise period as claimed in claim 1, is characterized in that: this control method is further comprising the steps of:
Step S111, system stops burner blower work automatically, enters step S112 after completing;
Step S112, system stalls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510835956.8A CN105486712A (en) | 2015-11-25 | 2015-11-25 | Method for simulation of fire hazard heating process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510835956.8A CN105486712A (en) | 2015-11-25 | 2015-11-25 | Method for simulation of fire hazard heating process |
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| CN105486712A true CN105486712A (en) | 2016-04-13 |
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| CN201510835956.8A Pending CN105486712A (en) | 2015-11-25 | 2015-11-25 | Method for simulation of fire hazard heating process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525474A (en) * | 2016-11-01 | 2017-03-22 | 上海同济建设工程质量检测站 | High-temperature test control method and system |
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Cited By (2)
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Inventor after: Yin Yuguo Inventor after: Jiang Qi Inventor after: Wei Bin Inventor after: Guo Qi Inventor after: Feng Zhiyu Inventor after: Guo Changpeng Inventor after: Ma Shipeng Inventor after: Zhu Ruitong Inventor before: Wei Bin Inventor before: Guo Qi Inventor before: Yin Yuguo Inventor before: Feng Zhiyu Inventor before: Jiang Qi Inventor before: Guo Changpeng Inventor before: Ma Shipeng Inventor before: Zhu Ruitong |
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Application publication date: 20160413 |