CN109816936A - A kind of gas safety monitoring device for hydrogen plasma coal acetylene - Google Patents
A kind of gas safety monitoring device for hydrogen plasma coal acetylene Download PDFInfo
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- CN109816936A CN109816936A CN201811640468.1A CN201811640468A CN109816936A CN 109816936 A CN109816936 A CN 109816936A CN 201811640468 A CN201811640468 A CN 201811640468A CN 109816936 A CN109816936 A CN 109816936A
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Abstract
A kind of gas safety monitoring device for hydrogen plasma coal acetylene, using controller, toxic and harmful gas detector, toxic and harmful gas sensor, combustible gas probe, combustible gas sensor, caliberating device；Real-time monitoring, dynamic calibration are carried out to toxic and harmful gas sensor and combustible gas sensor by controller, caliberating device, improve monitoring efficiency, the accuracy of testing result；Discovery fault sensor, effective guarantee are kept the safety in production ahead of time as far as possible simultaneously.
Description
Technical field
The present invention relates to a kind of gas safety monitoring devices for hydrogen plasma coal acetylene, belong to hydrogen plasma ignition
Control field.
Background technique
In current industrial environment and daily life, gases did escape is very common phenomenon, caused by endanger
Evil can not estimate that the lives and properties and social safety to the mankind cause great threat, the major accident thus caused
It can be found everywhere, so the problem of the carrying out pre- gas leakage prevention that take appropriate measures.
In the production such as petroleum industry, petrochemical industry, gas station, steel plant, transport, storage, use process, often go out
Phenomena such as now running, emit, leaking.Gas with inflammable, explosive, volatile characteristic, if a large amount of aggregation, when concentration reaches quick-fried
When the fried limit, under the action of external environment, fire or explosion accident will be caused, or even cause casualties and damaged with property
It loses.Toxic gas leakage be harm it is even more serious, so the mankind must not without case study gas leak the problem of, in order to
The generation for avoiding such accident is assembled with the application of gas alarm in inflammable and explosive or toxic gas place, gas
Leakage can issue alarm signal, start interlock protection control system, avoid the generation of accident or the damage control of accident exists
It is minimum；It is all easy to happen the problem of leakage when such as process of factory production, in storage and transport process, air draft can be driven, cut off the power, spray
The systems such as leaching, prevent explosion, fire, intoxication accident, to guarantee safe production.
In the prior art, examine the sensor of toxic and harmful gas and fuel gas that chemical principle is mostly used to realize,
Therefore it while carrying out gas safety monitoring, needs to demarcate sensor.But existing calibration method is generally artificial
Operation, demarcates low efficiency, and stated accuracy is poor；In addition, there is also accuracy decline problem, existing marks in use for sensor
Determining method was demarcated by the fixed cycle, and sensor accuracy is met the requirements when being last time calibration under normal conditions, lower deutero-albumose
Time Pick-off Units precision has been unsatisfactory for requiring, but the fault sensor has worked one in a fixed scalar period
The section time, for being related to the environment of safety in production, such case is breakneck.Also have using dual sensor in the prior art
The method of backup monitoring same point, but one side this method investment is big, it is at high cost, on the other hand, in some cases, it is monitored
Point does not have the condition of dual sensor backup monitoring, can not use dual sensor backup monitoring method.
Summary of the invention
The technical problem to be solved by the present invention is having overcome the deficiencies of the prior art and provide a kind of for hydrogen plasma coal
The gas safety monitoring device of acetylene processed, using controller, toxic and harmful gas detector, toxic and harmful gas sensor, can
Combustion gas bulk detector, combustible gas sensor, caliberating device；By controller, caliberating device to toxic and harmful gas sensor
Real-time monitoring, dynamic calibration are carried out with combustible gas sensor, improves monitoring efficiency, the accuracy of testing result；Simultaneously to the greatest extent
Possible discovery fault sensor ahead of time, effective guarantee safety in production.
The object of the invention is achieved by the following technical programs:
A kind of gas safety monitoring device for hydrogen plasma coal acetylene, including controller, toxic and harmful gas are visited
Survey device, toxic and harmful gas sensor, combustible gas probe, combustible gas sensor, caliberating device；
The toxic and harmful gas sensor is used to detect the toxic and harmful gas concentration of exterior space；It is described poisonous and harmful
Gas detector exports toxic and harmful gas electric signal to the controller according to the toxic and harmful gas concentration；The control
Device judges whether to alarm according to the toxic and harmful gas electric signal；
The combustible gas sensor is used to detect the combustable gas concentration of exterior space；The combustible gas probe root
Fuel gas electric signal is exported to the controller according to the combustable gas concentration；The controller is according to the fuel gas electricity
Signal judges whether to alarm；
The controller can control caliberating device to the toxic and harmful gas sensor and/or combustible gas sensor
It is demarcated.
The above-mentioned gas safety monitoring device for hydrogen plasma coal acetylene, the controller control caliberating device is to institute
Stating toxic and harmful gas sensor and carrying out calibration includes that toxic and harmful gas zero migration calibration and toxic and harmful gas range are inclined
Move calibration；It includes fuel gas zero migration that the controller control caliberating device, which carries out calibration to the combustible gas sensor,
Calibration and the calibration of fuel gas span shift；
The controller control caliberating device carries out the toxic and harmful gas sensor using Zero calibration method toxic
Pernicious gas zero migration calibration；The controller control caliberating device passes the toxic and harmful gas using range designation method
Sensor carries out the calibration of toxic and harmful gas span shift；Controller control caliberating device using Zero calibration method to it is described can
Combustion gas body sensor carries out fuel gas zero migration calibration；The controller control caliberating device is using range designation method to institute
It states combustible gas sensor and carries out the calibration of fuel gas span shift.
The above-mentioned gas safety monitoring device for hydrogen plasma coal acetylene, the controller is to any poisonous and harmful gas
Body sensor obtains the toxic and harmful gas sensor zero migration next time after carrying out toxic and harmful gas zero migration calibration
Nominal time；The controller is somebody's turn to do after carrying out the calibration of toxic and harmful gas span shift to the toxic and harmful gas sensor
Toxic and harmful gas sensor span shift nominal time next time；The controller finally determines and records the poisonous and harmful gas
The nominal time of body sensor next time takes the minimum value of zero migration nominal time and span shift nominal time；
The controller obtains the combustible gas after carrying out fuel gas zero migration calibration to any combustible gas sensor
Body sensor zero migration nominal time next time；It is inclined that the controller carries out fuel gas range to the combustible gas sensor
Combustible gas sensor span shift nominal time next time is obtained after moving calibration；The controller finally determines and records this
The nominal time of combustible gas sensor next time takes the minimum value of zero migration nominal time and span shift nominal time.
The above-mentioned gas safety monitoring device for hydrogen plasma coal acetylene, the method for the Zero calibration are as follows:
The controller control caliberating device exports zero migration marked gas, available gas in zero migration marked gas
Content is a, has criterion in the zero migration marked gas of the toxic and harmful gas sensor or combustible gas sensor measurement
Determining gas content is b；The zero point that the toxic and harmful gas sensor or combustible gas sensor measure is set as a；
As 0.8a≤b≤1.2a, controller is again to the toxic and harmful gas sensor or combustible gas after time T1
Body sensor carries out zero migration calibration；
As 0.5a≤b < 0.8a, controller is again to the toxic and harmful gas sensor or fuel gas after time T2
Sensor carries out zero migration calibration；
As 1.2a <b≤1.5a, controller is again to the toxic and harmful gas sensor or fuel gas after time T3
Sensor carries out zero migration calibration；
As b>1.5a or b<0.5a, the controller determines toxic harmful gas sensor or combustible gas sensor event
Hinder and issues sensor zero point fault warning；
Wherein
In formula, T0For the Zero calibration initial period, e is natural Exponents.
The above-mentioned gas safety monitoring device for hydrogen plasma coal acetylene, the method for the range designation are as follows:
The controller control caliberating device output range deviates marked gas, available gas in span shift marked gas
Content is c, has criterion in the span shift marked gas of the toxic and harmful gas sensor or combustible gas sensor measurement
Determining gas content is d；The range that the toxic and harmful gas sensor or combustible gas sensor measure is set as c；
As 0.95c≤d≤1.05c, controller is again to the toxic and harmful gas sensor or flammable after time T4
Gas sensor carries out span shift calibration；
As 0.8c≤d < 0.95c, controller is again to the toxic and harmful gas sensor or combustible gas after time T5
Body sensor carries out span shift calibration；
As 1.05c < d≤1.2c, controller is again to the toxic and harmful gas sensor or combustible gas after time T6
Body sensor carries out span shift calibration；
As d>1.2c or d<0.8c, the controller determines toxic harmful gas sensor or combustible gas sensor event
Hinder and issues transducer range fault warning；
Wherein
In formula, T0' it is the range designation initial period, e is natural Exponents.
The above-mentioned gas safety monitoring device for hydrogen plasma coal acetylene, the caliberating device includes zero migration mark
It calibrates quasi- gas bomb, span shift calibration calibrating gas steel cylinder, three-way magnetic valve, gas flowmeter, conduit, examine cover；
Zero migration calibration calibrating gas steel cylinder and span shift calibration calibrating gas steel cylinder toxic have for storing
Evil gas or fuel gas；The gas that the three-way magnetic valve is used to control in the zero migration calibration calibrating gas steel cylinder is defeated
Out or the gas in span shift calibration calibrating gas steel cylinder exports；The gas flowmeter is inclined for measuring the zero point
Move the flow of calibration calibrating gas steel cylinder or span shift calibration calibrating gas steel cylinder output gas；Inspection cover for have
Malicious harmful gas sensor or combustible gas sensor removably connect；The conduit for examine cover with gas flowmeter it
Between connection, the connection between gas flowmeter and three-way magnetic valve；
The controller can control the three-way magnetic valve；The controller can obtain the measurement knot of gas flowmeter
Fruit.
The above-mentioned gas safety monitoring device for hydrogen plasma coal acetylene, when the gas flow of gas flowmeter measurement
Less than or equal to pre-set gas flow 90% when, controller output caliberating device gas flow indicates extremely.
The above-mentioned gas safety monitoring device for hydrogen plasma coal acetylene, the toxic and harmful gas sensor are used for
Detect CO concentration；The combustible gas sensor is for detecting H2Concentration.
The above-mentioned gas safety monitoring device for hydrogen plasma coal acetylene, the toxic and harmful gas detector and more
A toxic and harmful gas sensor is connected using hot plug mode；The combustible gas probe and multiple combustible gas sensors
It is connected using hot plug mode.
The above-mentioned gas safety monitoring device for hydrogen plasma coal acetylene,
The toxic and harmful gas of the toxic and harmful gas sensor detection is CO；The combustible gas sensor detection
Fuel gas is H2；
The toxic and harmful gas sensor detection CO concentration range is 200ppm；When monitored environment CO concentration reaches
When 30ppm, controller exports the alarm of toxic and harmful gas level-one, and when monitored environment CO concentration reaches 60ppm, controller is defeated
Toxic and harmful gas secondary alarm out；
The combustible gas sensor detects H2Concentration range is 100%LEL；As monitored environment H2Concentration reaches 25%
When LEL, controller exports the alarm of fuel gas level-one, as monitored environment H2When concentration reaches 50%LEL, controller output can
Combustion gas body secondary alarm.
The present invention has the following beneficial effects: compared with the prior art
(1) the gas safety monitoring device of hydrogen plasma coal acetylene of the invention can be realized automatic zero point calibration and amount
Journey calibration, on the one hand greatly improved calibration efficiency, on the other hand improves the accuracy of calibration result, avoid artificial calibration
When caused by error, to reduce the generation of accident；
(2) the gas safety monitoring device of hydrogen plasma coal acetylene of the invention uses the dynamic calibration period, for
The good sensor of technical indicator reduces workload in the case where guaranteeing testing result using biggish scalar period, for
The sensor of technical indicator decline finds that failure is passed in the case where guaranteeing monitoring result using lesser scalar period as early as possible
Sensor reduces security risk；
(3) in the dynamic calibration period of the gas safety monitoring device of hydrogen plasma coal acetylene of the invention, according to biography
Corresponding scalar period has been set dynamically in the decline degree of sensor technical indicator, and corresponding scalar period considers sensor technology
Index declines the influence of degree, downward trend；
(4) the gas safety monitoring device of hydrogen plasma coal acetylene of the invention is passed by the way of parallel interface
Sensor is connect with detector；For the environment with multisensor backup monitoring, multiple sensor redundancies can also be used simultaneously
Mode increases monitoring time, for being difficult to the monitoring point of more emat sensor, without frequently carrying out replacement fault sensor；
(5) the gas safety monitoring device of hydrogen plasma coal acetylene of the invention can be to toxic and harmful gas and flammable
The leak degree of gas is alarmed respectively, is conducive to take corresponding treatment measures；The device is to sensor fault simultaneously
Independent alarm is carried out, convenient for individually being come out to fault sensor.
Detailed description of the invention
Fig. 1 is the composition schematic diagram of apparatus of the present invention；
Fig. 2 is the composition schematic diagram of caliberating device in apparatus of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to implementation of the invention
Mode is described in further detail.
A kind of gas safety monitoring device for hydrogen plasma coal acetylene, including controller, toxic and harmful gas are visited
Device, toxic and harmful gas sensor, combustible gas probe, combustible gas sensor, caliberating device are surveyed, such as Fig. 1 and Fig. 2 institute
Show.The toxic and harmful gas sensor is for detecting CO concentration；The combustible gas sensor is for detecting H2Concentration.
The toxic and harmful gas sensor is used to detect the toxic and harmful gas concentration of exterior space；It is described poisonous and harmful
Gas detector exports toxic and harmful gas electric signal to the controller according to the toxic and harmful gas concentration；The control
Device judges whether to alarm according to the toxic and harmful gas electric signal.The toxic and harmful gas detector with it is multiple poisonous and harmful
Gas sensor is connected using hot plug mode；The combustible gas probe and multiple combustible gas sensors use hot plug
Mode connects.
The combustible gas sensor is used to detect the combustable gas concentration of exterior space；The combustible gas probe root
Fuel gas electric signal is exported to the controller according to the combustable gas concentration；The controller is according to the fuel gas electricity
Signal judges whether to alarm.
The toxic and harmful gas sensor detection CO concentration range is 200ppm；When monitored environment CO concentration reaches
When 30ppm, controller exports the alarm of toxic and harmful gas level-one, and when monitored environment CO concentration reaches 60ppm, controller is defeated
Toxic and harmful gas secondary alarm out；
The combustible gas sensor detects H2Concentration range is 100%LEL；As monitored environment H2Concentration reaches 25%
When LEL, controller exports the alarm of fuel gas level-one, as monitored environment H2When concentration reaches 50%LEL, controller output can
Combustion gas body secondary alarm.
The controller can control caliberating device to the toxic and harmful gas sensor and/or combustible gas sensor
It is demarcated.
The caliberating device includes zero migration calibration calibrating gas steel cylinder, span shift calibration calibrating gas steel cylinder, three
Three-way electromagnetic valve, conduit, examines cover at gas flowmeter；
Zero migration calibration calibrating gas steel cylinder and span shift calibration calibrating gas steel cylinder toxic have for storing
Evil gas or fuel gas, the pressure that zero migration calibration calibrating gas steel cylinder and span shift are demarcated in calibrating gas steel cylinder are
9Mpa, output gas flow of gas 5L/min；The three-way magnetic valve is for controlling the zero migration calibration calibrating gas steel cylinder
Gas output in interior gas output or span shift calibration calibrating gas steel cylinder；The gas flowmeter is for measuring
The flow of the zero migration calibration calibrating gas steel cylinder or span shift calibration calibrating gas steel cylinder output gas；The inspection
Cover with toxic and harmful gas sensor or combustible gas sensor for removably connecting (when calibrating gas is demarcated in zero migration
When steel cylinder or span shift calibration calibrating gas steel cylinder output gas, the pressure support of output gas examines the sealing gear in cover
Plate makes to examine and covers and seal between toxic and harmful gas sensor or combustible gas sensor, when zero migration calibration Standard Gases
When body steel cylinder or span shift calibration calibrating gas steel cylinder stop output gas, cover and toxic and harmful gas sensor or can are examined
Sealing is automatically terminated between combustion gas body sensor)；The conduit be used for examines cover gas flowmeter between connection, gas stream
Connection between meter and three-way magnetic valve；
The controller can control the three-way magnetic valve；The controller can obtain the measurement knot of gas flowmeter
Fruit.When the gas flow of gas flowmeter measurement is less than or equal to the 90% of pre-set gas flow, the controller output calibration
Device gas flow indicates extremely.
It includes poisonous and harmful gas that the controller control caliberating device, which carries out calibration to the toxic and harmful gas sensor,
Body zero migration calibration and the calibration of toxic and harmful gas span shift；The controller control caliberating device is to the fuel gas
It includes that fuel gas zero migration calibration and fuel gas span shift are demarcated that sensor, which carries out calibration,；
The controller control caliberating device carries out the toxic and harmful gas sensor using Zero calibration method toxic
Pernicious gas zero migration calibration；The controller control caliberating device passes the toxic and harmful gas using range designation method
Sensor carries out the calibration of toxic and harmful gas span shift；Controller control caliberating device using Zero calibration method to it is described can
Combustion gas body sensor carries out fuel gas zero migration calibration；The controller control caliberating device is using range designation method to institute
It states combustible gas sensor and carries out the calibration of fuel gas span shift.
The method of the Zero calibration are as follows:
The controller control caliberating device exports zero migration marked gas, available gas in zero migration marked gas
Content is a, has criterion in the zero migration marked gas of the toxic and harmful gas sensor or combustible gas sensor measurement
Determining gas content is b；The zero point that the toxic and harmful gas sensor or combustible gas sensor measure is set as a；
As 0.8a≤b≤1.2a, controller is again to the toxic and harmful gas sensor or combustible gas after time T1
Body sensor carries out zero migration calibration；
As 0.5a≤b < 0.8a, controller is again to the toxic and harmful gas sensor or fuel gas after time T2
Sensor carries out zero migration calibration；
As 1.2a <b≤1.5a, controller is again to the toxic and harmful gas sensor or fuel gas after time T3
Sensor carries out zero migration calibration；
As b>1.5a or b<0.5a, the controller determines toxic harmful gas sensor or combustible gas sensor event
Hinder and issues sensor zero point fault warning；
Wherein
In formula, T0For the Zero calibration initial period, e is natural Exponents.T in present embodiment0Value is 720h.
The method of the range designation are as follows:
The controller control caliberating device output range deviates marked gas, available gas in span shift marked gas
Content is c, has criterion in the span shift marked gas of the toxic and harmful gas sensor or combustible gas sensor measurement
Determining gas content is d；The range that the toxic and harmful gas sensor or combustible gas sensor measure is set as c；
As 0.95c≤d≤1.05c, controller is again to the toxic and harmful gas sensor or flammable after time T4
Gas sensor carries out span shift calibration；
As 0.8c≤d < 0.95c, controller is again to the toxic and harmful gas sensor or combustible gas after time T5
Body sensor carries out span shift calibration；
As 1.05c < d≤1.2c, controller is again to the toxic and harmful gas sensor or combustible gas after time T6
Body sensor carries out span shift calibration；
As d>1.2c or d<0.8c, the controller determines toxic harmful gas sensor or combustible gas sensor event
Hinder and issues transducer range fault warning；
Wherein
In formula, T0' it is the range designation initial period, e is natural Exponents.T in present embodiment0' value is 720h.
The controller obtains after carrying out toxic and harmful gas zero migration calibration to any toxic and harmful gas sensor
Toxic and harmful gas sensor zero migration nominal time next time；The controller to the toxic and harmful gas sensor into
Toxic and harmful gas sensor span shift nominal time next time is obtained after the calibration of row toxic and harmful gas span shift；Institute
It states controller and finally determines and records that the nominal time of the toxic and harmful gas sensor next time takes the zero migration nominal time
With the minimum value of span shift nominal time；
The controller obtains the combustible gas after carrying out fuel gas zero migration calibration to any combustible gas sensor
Body sensor zero migration nominal time next time；It is inclined that the controller carries out fuel gas range to the combustible gas sensor
Combustible gas sensor span shift nominal time next time is obtained after moving calibration；The controller finally determines and records this
The nominal time of combustible gas sensor next time takes the minimum value of zero migration nominal time and span shift nominal time.
Embodiment:
A kind of gas safety monitoring device for hydrogen plasma coal acetylene, including controller, toxic and harmful gas are visited
Survey device, toxic and harmful gas sensor, combustible gas probe, combustible gas sensor, caliberating device.
Toxic and harmful gas sensor detection gas are CO gas, one oxidation of toxic and harmful gas sensor detection
Carbon gas concentration range is in 0~200ppm；It alarms when detecting ambient concentration and reaching 30ppm for level-one, when detectable concentration reaches
It is secondary alarm when 60ppm；Toxic and harmful gas sensor uses electrochemical transducer[sensor, when it detects corresponding gas concentration
Later, toxic gas sensor harmful gas detector is connected by parallel interface, then toxic and harmful gas detector passes through the letter of 4~20mA
Signal is transferred to controller, alarm signal is generated after controller judgement, scene can generate sound-light alarm by number transmission mode；
In addition to this toxic and harmful gas detector and toxic and harmful gas sensor belong to antiknock device (explosive-proof grade:
EXdIICT6, degree of protection: IP66).
Combustible gas sensor detection gas are hydrogen gas, and combustible gas sensor detection hydrogen gas concentration range exists
0~100%LEL；It alarms when detecting ambient concentration and reaching 25%LEL for level-one, is two when detectable concentration reaches 50%LEL
Grade alarm；Combustible gas sensor uses catalytic combustion-type sensor, after combustible gas sensor detects gas concentration, leads to
Parallel interface connection combustible gas probe is crossed, then combustible gas probe passes through the signal transmission form of 4~20mA, letter
Number it is transferred to controller；Alarm signal is generated after controller judgement, scene can generate sound-light alarm；In addition to this live flammable
Gas detector river combustible gas sensor belongs to antiknock device (explosive-proof grade: EXdIICT6, degree of protection: IP66).
Caliberating device: calibration is divided into zero calibration and span calibration.Including calibrating gas steel cylinder, three-way magnetic valve, gas
Flowmeter, conduit, verification cover.Calibrating gas steel cylinder is connect with three-way magnetic valve, gas flowmeter is then connected, passes through conduit
With verification cover connection, verification cover can be screwed with Sensor section by screw thread the output result calibrated, after being calibrated, under
Nominal time etc..
The present invention is by the monitoring of gas safety monitoring device, the setting of warning device parameter, can to ambient enviroment into
Row monitoring, has effectively been reduced or avoided the generation of accident, can manpower caused by mitigation accident, material resources, brought by financial resources
Loss, more efficiently, quickly, accurately carries out the monitoring of flammable toxic and harmful gas.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (10)
1. a kind of gas safety monitoring device for hydrogen plasma coal acetylene, it is characterised in that: including controller, toxic have
Evil gas detector, toxic and harmful gas sensor, combustible gas probe, combustible gas sensor, caliberating device；
The toxic and harmful gas sensor is used to detect the toxic and harmful gas concentration of exterior space；The toxic and harmful gas
Detector exports toxic and harmful gas electric signal to the controller according to the toxic and harmful gas concentration；The controller root
Judge whether to alarm according to the toxic and harmful gas electric signal；
The combustible gas sensor is used to detect the combustable gas concentration of exterior space；The combustible gas probe is according to institute
It states combustable gas concentration and exports fuel gas electric signal to the controller；The controller is according to the fuel gas electric signal
Judge whether to alarm；
The controller can control caliberating device and carry out to the toxic and harmful gas sensor and/or combustible gas sensor
Calibration.
2. a kind of gas safety monitoring device for hydrogen plasma coal acetylene according to claim 1, feature exist
In: it includes toxic and harmful gas zero point that the controller control caliberating device, which carries out calibration to the toxic and harmful gas sensor,
Offset calibration and the calibration of toxic and harmful gas span shift；The controller control caliberating device is to the combustible gas sensor
Carrying out calibration includes that fuel gas zero migration calibration and fuel gas span shift are demarcated；
The controller control caliberating device carries out the toxic and harmful gas sensor using Zero calibration method poisonous and harmful
Gas zero migration calibration；The controller control caliberating device is using range designation method to the toxic and harmful gas sensor
Carry out the calibration of toxic and harmful gas span shift；The controller control caliberating device is using Zero calibration method to the combustible gas
Body sensor carries out fuel gas zero migration calibration；Controller control caliberating device using range designation method to it is described can
Combustion gas body sensor carries out the calibration of fuel gas span shift.
3. a kind of gas safety monitoring device for hydrogen plasma coal acetylene according to claim 2, feature exist
It is toxic that this is obtained after: the controller carries out toxic and harmful gas zero migration calibration to any toxic and harmful gas sensor
Harmful gas sensor zero migration nominal time next time；The controller carries out the toxic and harmful gas sensor toxic
Toxic and harmful gas sensor span shift nominal time next time is obtained after the calibration of pernicious gas span shift；The control
Device finally determines and records that the nominal time of the toxic and harmful gas sensor next time takes zero migration nominal time and range
Deviate the minimum value of nominal time；
The controller obtains fuel gas biography after carrying out fuel gas zero migration calibration to any combustible gas sensor
Sensor zero migration nominal time next time；The controller carries out fuel gas span shift mark to the combustible gas sensor
Combustible gas sensor span shift nominal time next time is obtained after fixed；The controller finally determines and records that this is flammable
The nominal time of gas sensor next time takes the minimum value of zero migration nominal time and span shift nominal time.
4. a kind of gas safety monitoring device for hydrogen plasma coal acetylene according to claim 2, feature exist
In:
The method of the Zero calibration are as follows:
The controller control caliberating device exports zero migration marked gas, available gas content in zero migration marked gas
For a, gas is effectively demarcated in the zero migration marked gas of the toxic and harmful gas sensor or combustible gas sensor measurement
Body content is b；The zero point that the toxic and harmful gas sensor or combustible gas sensor measure is set as a；
As 0.8a≤b≤1.2a, controller again passes the toxic and harmful gas sensor or fuel gas after time T1
Sensor carries out zero migration calibration；
As 0.5a≤b < 0.8a, controller again senses the toxic and harmful gas sensor or fuel gas after time T2
Device carries out zero migration calibration；
As 1.2a <b≤1.5a, controller again senses the toxic and harmful gas sensor or fuel gas after time T3
Device carries out zero migration calibration；
As b>1.5a or b<0.5a, the controller determines toxic harmful gas sensor or combustible gas sensor failure simultaneously
Issue sensor zero point fault warning；
Wherein
In formula, T0For the Zero calibration initial period, e is natural Exponents.
5. a kind of gas safety monitoring device for hydrogen plasma coal acetylene according to claim 2, feature exist
In:
The method of the range designation are as follows:
The controller control caliberating device output range deviates marked gas, available gas content in span shift marked gas
For c, gas is effectively demarcated in the span shift marked gas of the toxic and harmful gas sensor or combustible gas sensor measurement
Body content is d；The range that the toxic and harmful gas sensor or combustible gas sensor measure is set as c；
As 0.95c≤d≤1.05c, controller is again to the toxic and harmful gas sensor or fuel gas after time T4
Sensor carries out span shift calibration；
As 0.8c≤d < 0.95c, controller again passes the toxic and harmful gas sensor or fuel gas after time T5
Sensor carries out span shift calibration；
As 1.05c < d≤1.2c, controller again passes the toxic and harmful gas sensor or fuel gas after time T6
Sensor carries out span shift calibration；
As d>1.2c or d<0.8c, the controller determines toxic harmful gas sensor or combustible gas sensor failure simultaneously
Issue transducer range fault warning；
Wherein
In formula, T0' it is the range designation initial period, e is natural Exponents.
6. a kind of gas safety monitoring device for hydrogen plasma coal acetylene according to claim 1, feature exist
In: the caliberating device includes zero migration calibration calibrating gas steel cylinder, span shift calibration calibrating gas steel cylinder, threeway electromagnetism
Valve, conduit, examines cover at gas flowmeter；
The zero migration calibration calibrating gas steel cylinder and span shift calibration calibrating gas steel cylinder are for storing poisonous and harmful gas
Body or fuel gas；The three-way magnetic valve be used to control gas output in zero migration calibration calibrating gas steel cylinder or
Gas output in the span shift calibration calibrating gas steel cylinder；The gas flowmeter is for measuring the zero migration mark
Calibrate the flow of quasi- gas bomb or span shift calibration calibrating gas steel cylinder output gas；The inspection cover with toxic for having
Evil gas sensor or combustible gas sensor removably connect；The conduit is for examining between cover and gas flowmeter
Connection between connection, gas flowmeter and three-way magnetic valve；
The controller can control the three-way magnetic valve；The controller can obtain the measurement result of gas flowmeter.
7. a kind of gas safety monitoring device for hydrogen plasma coal acetylene according to claim 6, feature exist
In: when the gas flow of gas flowmeter measurement is less than or equal to the 90% of pre-set gas flow, the controller output calibration
Device gas flow indicates extremely.
8. a kind of gas safety monitoring device for hydrogen plasma coal acetylene described according to claim 1~one of 7,
Be characterized in that: the toxic and harmful gas sensor is for detecting CO concentration；The combustible gas sensor is for detecting H2It is dense
Degree.
9. a kind of gas safety monitoring device for hydrogen plasma coal acetylene described according to claim 1~one of 7,
Be characterized in that: the toxic and harmful gas detector is connect with multiple toxic and harmful gas sensors using hot plug mode；Institute
It states combustible gas probe and is connect with multiple combustible gas sensors using hot plug mode.
10. a kind of gas safety monitoring device for hydrogen plasma coal acetylene described according to claim 1~one of 7,
It is characterized by:
The toxic and harmful gas of the toxic and harmful gas sensor detection is CO；The combustible gas sensor detects flammable
Gas is H2；
The toxic and harmful gas sensor detection CO concentration range is 200ppm；When monitored environment CO concentration reaches 30ppm
When, controller exports the alarm of toxic and harmful gas level-one, and when monitored environment CO concentration reaches 60ppm, controller output has
Malicious pernicious gas secondary alarm；
The combustible gas sensor detects H2Concentration range is 100%LEL；As monitored environment H2Concentration reaches 25%LEL
When, controller exports the alarm of fuel gas level-one, as monitored environment H2When concentration reaches 50%LEL, controller output is flammable
Gas secondary alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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