CN110298995A - The method of discrimination of poisonous gas leakage monitoring system and leak type - Google Patents
The method of discrimination of poisonous gas leakage monitoring system and leak type Download PDFInfo
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- CN110298995A CN110298995A CN201910558858.2A CN201910558858A CN110298995A CN 110298995 A CN110298995 A CN 110298995A CN 201910558858 A CN201910558858 A CN 201910558858A CN 110298995 A CN110298995 A CN 110298995A
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- concentration
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- poison gas
- filling
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/14—Toxic gas alarms
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Automation & Control Theory (AREA)
- Emergency Alarm Devices (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses poisonous gas leakage monitoring systems, including PLC, poison gas concentration detection sensor, blower, master control valve, bottom valve, control amount valve, alarm and display screen, the poison gas concentration detection sensor, blower, master control valve, bottom valve, control amount valve, alarm and display screen are electrically connected with PLC respectively, the poison gas concentration detection sensor is mounted in filling apparatus, position apart from filling spray gun 200mm, the output signal line of detection of poison gas sensor is tapped into PLC Analog input mModule, concentration of toxic gases value is read using PLC and is judged, it realizes under non-closed filling environment, complicated poison gas leak case is combined by poison gas concentration value and change rate of concentration and is judged, and alarm is controlled according to various concentration leak case, display screen, the working condition of blower and valve, It reduces and is injured caused by poison gas leakage, avoid the false alarm phenomenon of existing detection system.
Description
Technical field
The present invention relates to full-automatic chemical field, especially a kind of poisonous gas leakage monitoring system and leak type are sentenced
Other method.
Background technique
In field of chemical equipment, readily volatilized in pouring process toxic gas can be right if concentration of toxic gases is excessive out
The health of Field Force damages, and chemical accident can be caused under serious situation.
The volatilization of various concentration, surrounding filling environment meeting can be generated due to different material characteristic under non-closed filling environment
Poison gas concentration has a small amount of growth.Conventional detection of poison gas mode can generate false alarm when the alarming value of setting is too low, if set
It can postpone the time found the problem when setting excessively high.Conventional pernicious gas detection has shortcoming below:
1. Field Force cannot be made to predict problem in advance without pre-alarm, valve is closed after gas concentration reaches dangerous values and is shut down
Alarm.
2. cannot be used under non-closed filling environment.Pernicious gas can be volatilized under non-closed filling environment, can not be sentenced
Disconnected is leakage in short-term or lasting leakage, using can above generate false alarm.
3. reducing the exhaust fan that harmful gas concentration uses as duration unlatching, electricity consumption waste can be generated.
Summary of the invention
It is an object of the present invention to solve the deficiencies in the prior art, a kind of poisonous gas leakage monitoring system is provided and is let out
Leak the method for discrimination of type.
In order to achieve the above object, the following technical schemes are provided:
The method of discrimination of poisonous gas leakage type, comprising the following steps:
S1: preset alarm value is P1: can volatilize micro poison gas in pouring process, preset alarm value should it is a little higher than just
Normal poison gas concentration value；
Exceeded preset alarm value is P2: can generate danger to ambient enviroment and operator when poison gas concentration is higher than certain value
Evil, exceeded alarming value are the dangerous concentrations value of corresponding chemical material；
Cmin value P0: corresponding concentration value when will not be had an impact to human body and ambient enviroment；
Change rate of concentration Δ P: Δ P=(Pt2-Pt1)/T, in unit time T, concentration increases Pt2-Pt1；
Change rate of concentration alarming value is Δ P1: will lead to the concentration value of toxic gas when pipeline leakage occurs in unit
Interior quick raising can assert at this time the wind for having leakage when change rate of concentration Δ P is higher than when change rate of concentration alarming value is Δ P1
Danger；
S2: poison gas concentration detection sensor acquires the gassed concentration value P of air, as concentration value P≤P0, nothing in real time
Movement；
S3: as concentration value P0 < P≤P1, judging change rate of concentration Δ P, as Δ P < Δ P1, executes step
S4；As Δ P >=Δ P1, step S7 is executed；
S4: as concentration value P2>P>P1, judging change rate of concentration Δ P, as Δ P<Δ P1, for short-term leakage
Execute step S7；As Δ P >=Δ P1, step S7 and S8 are executed for lasting leakage；
S5: as concentration value P >=P2, for lasting leakage, step S7 and S9 are executed；
S6: as concentration value P≤P0, step S7 and S10 are executed；
S7: it is prompted by display screen；
S8: alarming, and opens blower；
S9: alarming, and opens blower, and close all filling valves；
S10: stop alarm closes blower.
Poisonous gas leakage monitoring system, including PLC, poison gas concentration detection sensor, blower, master control valve, bottom valve, control amount
Valve, alarm and display screen, the poison gas concentration detection sensor, blower, master control valve, bottom valve, control amount valve, alarm and display
Screen is electrically connected with PLC respectively, and the poison gas concentration detection sensor is mounted in filling apparatus, apart from filling spray gun 200mm's
Position taps into the output signal line of detection of poison gas sensor in PLC Analog input mModule, reads toxic gas using PLC
Concentration value simultaneously judged,
Master control valve: control chemical material enters bottle placer, and valve is opened when filling, closes valve in filling completion；
Bottom valve: control chemical material flows into bucket, and valve is opened when filling, closes valve in filling completion；
Control amount valve: filling speed is adjusted by adjusting control amount valve angle, Quick-filling when control amount valve is opened, control amount valve closes
It is filling at a slow speed when closing；
Blower: establishing negative pressure, siphons away the toxic gas in equipment；
Alarm: when equipment generates abnormal, field personnel is indicated by alarm lamp；
Display screen: it for showing existing concentration value and alarm content, can be carried out by alarming value of the man-machine interface to concentration
Setting, and it is used for monitoring device state.
The invention has the benefit that the present invention realizes under non-closed filling environment, feelings are revealed to complicated poison gas
Condition is combined by poison gas concentration value and change rate of concentration to be judged, and is controlled alarm according to various concentration leak case, shown
The working condition of display screen, blower and valve is reduced and is injured caused by poison gas leakage, avoids the false alarm of existing detection system existing
As.
Detailed description of the invention
Fig. 1 is poison gas concentration value change curve；
Fig. 2 is electric drawings of the present invention；
Fig. 3 present invention is equipment scheme of installation.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Middle attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is real
The component for applying example can be arranged and be designed with a variety of different configurations.Therefore, of the invention to what is provided in the accompanying drawings below
The detailed description of embodiment is not intended to limit the range of claimed invention, but is merely representative of selected reality of the invention
Apply example.Based on the embodiment of the present invention, those skilled in the art institute obtained without making creative work
There are other embodiments, shall fall within the protection scope of the present invention.
It should be noted that in the description of the present invention, term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In addition, in the description of the present invention unless specifically defined or limited otherwise, term " installation ", " connects " connected "
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in the present invention with concrete condition
Concrete meaning.
The method of discrimination of poisonous gas leakage type, comprising the following steps:
S1: preset alarm value is P1: can volatilize micro poison gas in pouring process, preset alarm value should it is a little higher than just
Normal poison gas concentration value；Preset alarm value is higher than normal poison gas concentration value 5ppm；
Exceeded preset alarm value is P2: can generate danger to ambient enviroment and operator when poison gas concentration is higher than certain value
Evil, exceeded alarming value are the dangerous concentrations value of corresponding chemical material；Exceeded preset alarm value is that P2 is higher than normal poison gas concentration
Value 45ppm.
Cmin value P0: corresponding concentration value when will not be had an impact to human body and ambient enviroment；Cmin value P0
Higher than normal poison gas concentration value 2ppm.
Change rate of concentration Δ P: Δ P=(Pt2-Pt1)/T, in unit time T, concentration increases Pt2-Pt1；
Change rate of concentration alarming value is Δ P1: will lead to the concentration value of toxic gas when pipeline leakage occurs in unit
Interior quick raising can assert at this time the wind for having leakage when change rate of concentration Δ P is higher than when change rate of concentration alarming value is Δ P1
Danger；Change rate of concentration alarming value is that Δ P1 is 5ppm/min.
S2: poison gas concentration detection sensor acquires the gassed concentration value P of air, as concentration value P≤P0, nothing in real time
Movement；
S3: as concentration value P0 < P≤P1, judging change rate of concentration Δ P, as Δ P < Δ P1, executes step
S4；As Δ P >=Δ P1, step S7 is executed；
S4: as concentration value P2>P>P1, judging change rate of concentration Δ P, as Δ P<Δ P1, for short-term leakage
Execute step S7；As Δ P >=Δ P1, step S7 and S8 are executed for lasting leakage；
S5: as concentration value P >=P2, for lasting leakage, step S7 and S9 are executed；
S6: as concentration value P≤P0, step S7 and S10 are executed；
S7: it is prompted by display screen；
S8: alarming, and opens blower；
S9: alarming, and opens blower, and close all filling valves；
S10: stop alarm closes blower.
Poison gas concentration value change curve when as shown in Figure 1 for the poison gas leakage of leakage scene record, in 1- in figure
Micro toxic gas is had when 3min in filling environment but site operation personnel will not be impacted.
Note: after reaching alert if, after concentration value has to be lower than warning concentration-return difference value, alarm could be released, and be prevented
Output signal shake.
Concentration is more than 10ppm (preset alarm value P1) when 5-7min, but change rate of concentration Δ P is less than change rate of concentration
Alarming value 5ppm/min, belong to non-closed environment it is filling when generation normal phenomenon, only done in the prompt window of man-machine interface
Prompt does not generate alarm still out；
Change rate of concentration Δ P is more than change rate of concentration alarming value 5ppm/min after 11min starts and concentration is greater than 10ppm
(prompt preset alarm value), is judged as lasting leakage at this time, starts blower and is reminded in advance scene, makes Field Force faster
Know leakage situation.
After 15min rises to 50ppm (exceeded preset alarm value), bulking system closes all valves, prevents harmful gas
Body further generates.
Poisonous gas leakage monitoring system as shown in Figures 2 and 3, including PLC1, poison gas concentration detection sensor 3, wind
Machine 2, master control valve 5, bottom valve 6, control amount valve 7, alarm 4 and display screen, the poison gas concentration detection sensor 3, blower 2, master control
Valve 5, bottom valve 6, control amount valve 7, alarm 4 and display screen are electrically connected with PLC1 respectively, and the poison gas concentration detection sensor 3 is installed
In filling apparatus, the output signal line of detection of poison gas sensor is tapped into PLC simulation by position apart from filling spray gun 200mm
It measures in input module, read concentration of toxic gases value using PLC and is judged,
Master control valve 5: control chemical material enters bottle placer, and valve is opened when filling, closes valve in filling completion；
Bottom valve 6: control chemical material flows into bucket, and valve is opened when filling, closes valve in filling completion；
Control amount valve 7: adjusting filling speed by adjusting control amount valve angle, Quick-filling when control amount valve is opened, control amount valve
It is filling at a slow speed when closing；
Blower 2: establishing negative pressure, siphons away the toxic gas in equipment；
Alarm 4: when equipment generates abnormal, field personnel is indicated by alarm lamp；
Display screen: it for showing existing concentration value and alarm content, can be carried out by alarming value of the man-machine interface to concentration
Setting, and it is used for monitoring device state.
The warning message shown by display screen reminds operator to take corresponding measure.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. the method for discrimination of poisonous gas leakage type, which comprises the following steps:
S1: preset alarm value is P1: micro poison gas can be volatilized in pouring process, preset alarm value should be a little higher than normal
Poison gas concentration value；
Exceeded preset alarm value is P2: when poison gas concentration is higher than certain value harm can be generated to ambient enviroment and operator,
Exceeded alarming value is the dangerous concentrations value of corresponding chemical material；
Cmin value P0: corresponding concentration value when will not be had an impact to human body and ambient enviroment；
Change rate of concentration Δ P: Δ P=(Pt2-Pt1)/T, in unit time T, concentration increases Pt2-Pt1；
Change rate of concentration alarming value is Δ P1: will lead to the concentration value of toxic gas when pipeline leakage occurs within the unit time
It quickly increases, can assert at this time the risk for having leakage when change rate of concentration Δ P is higher than when change rate of concentration alarming value is Δ P1；
S2: poison gas concentration detection sensor acquires the gassed concentration value P of air in real time, as concentration value P≤P0, without dynamic
Make；
S3: as concentration value P0 < P≤P1, judging change rate of concentration Δ P, as Δ P < Δ P1, executes step S4；When
When Δ P >=Δ P1, step S7 is executed；
S4: as concentration value P2>P>P1, judging change rate of concentration Δ P, as Δ P<Δ P1, executes for short-term leakage
Step S7；As Δ P >=Δ P1, step S7 and S8 are executed for lasting leakage；
S5: as concentration value P >=P2, for lasting leakage, step S7 and S9 are executed；
S6: as concentration value P≤P0, step S7 and S10 are executed；
S7: it is prompted by display screen；
S8: alarming, and opens blower；
S9: alarming, and opens blower, and close all filling valves；
S10: stop alarm closes blower.
2. poisonous gas leakage monitoring system, which is characterized in that including PLC, poison gas concentration detection sensor, blower, master control valve,
Bottom valve, control amount valve, alarm and display screen, the poison gas concentration detection sensor, blower, master control valve, bottom valve, control amount valve, report
Alert device and display screen are electrically connected with PLC respectively, and the poison gas concentration detection sensor is mounted in filling apparatus, apart from filling material
The output signal line of detection of poison gas sensor is tapped into PLC Analog input mModule, is read using PLC by the position of rifle 200mm
Concentration of toxic gases value is simultaneously judged；
Master control valve: control chemical material enters bottle placer, and valve is opened when filling, closes valve in filling completion；
Bottom valve: control chemical material flows into bucket, and valve is opened when filling, closes valve in filling completion；
Control amount valve: filling speed is adjusted by adjusting control amount valve angle, Quick-filling when control amount valve is opened, when control amount valve is closed
It is filling at a slow speed；
Blower: establishing negative pressure, siphons away the toxic gas in equipment；
Alarm: when equipment generates abnormal, field personnel is indicated by alarm lamp；
Display screen: for showing existing concentration value and alarm content, can be configured by alarming value of the man-machine interface to concentration,
And it is used for monitoring device state.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836954A (en) * | 2019-11-01 | 2020-02-25 | 淮安信息职业技术学院 | Toxic gas leakage hazard prediction system and method based on PLC control |
| CN113516831A (en) * | 2021-07-05 | 2021-10-19 | 南京盛航海运股份有限公司 | Ship safety detection method, system, equipment and storage medium |
| CN115326295A (en) * | 2022-10-13 | 2022-11-11 | 潍柴动力股份有限公司 | Hydrogen leakage detection method, device, equipment and storage medium |
| CN116858440A (en) * | 2023-09-05 | 2023-10-10 | 百穰新能源科技(深圳)有限公司 | Leakage detection method and device, leakage disposal method and device, and processing system |
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| JP2006118939A (en) * | 2004-10-20 | 2006-05-11 | Riken Keiki Co Ltd | Gas sensor |
| CN103208168A (en) * | 2013-01-31 | 2013-07-17 | 杨如祥 | Gas monitoring alarm method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836954A (en) * | 2019-11-01 | 2020-02-25 | 淮安信息职业技术学院 | Toxic gas leakage hazard prediction system and method based on PLC control |
| CN113516831A (en) * | 2021-07-05 | 2021-10-19 | 南京盛航海运股份有限公司 | Ship safety detection method, system, equipment and storage medium |
| CN115326295A (en) * | 2022-10-13 | 2022-11-11 | 潍柴动力股份有限公司 | Hydrogen leakage detection method, device, equipment and storage medium |
| CN116858440A (en) * | 2023-09-05 | 2023-10-10 | 百穰新能源科技(深圳)有限公司 | Leakage detection method and device, leakage disposal method and device, and processing system |
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Application publication date: 20191001 |