CN108762119B - Flame ignition device for analytical instrument and control method - Google Patents
Flame ignition device for analytical instrument and control method Download PDFInfo
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- CN108762119B CN108762119B CN201810512582.XA CN201810512582A CN108762119B CN 108762119 B CN108762119 B CN 108762119B CN 201810512582 A CN201810512582 A CN 201810512582A CN 108762119 B CN108762119 B CN 108762119B
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention relates to a flame ignition device and a control method for an analytical instrument, wherein the device comprises a power supply system consisting of a switching power supply; an ignition system consisting of a solid state relay and a glow plug; a sensor system consisting of a current sensor, a glow plug temperature sensor, a flame sensor, an ambient temperature sensor, an atmospheric pressure sensor; and the control system is respectively and electrically connected with the switching power supply, the solid-state relay, the current sensor, the glow plug temperature sensor, the flame sensor, the ambient temperature sensor and the atmospheric pressure sensor. The invention controls the average power, ignition time and ignition logic of the glow plug through the control system, and simultaneously combines the data fed back by the sensor to perform intelligent ignition compensation, and has the advantages of high ignition reliability, long service life, no electric and ultraviolet spectrum interference, simple structure and the like.
Description
Technical Field
The invention belongs to the technical field of analytical instruments, and particularly relates to a flame ignition device and a control method for an analytical instrument.
Background
In the field of analytical instrument-related detection techniques, flames are widely used as a means of atomization, ionization or thermal excitation. For example, gas chromatography uses a hydrogen flame as the means of ionization of the component to be measured, providing an ion source for the flame ionization detector; meanwhile, the hydrogen flame is also an excitation source of the gas chromatography flame photometric detector; the atomic absorption uses acetylene flame, and the atomic fluorescence uses argon-hydrogen flame or flame formed by burning other combustible gas as atomization means.
Flame is an essential key technology for chromatographic and spectroscopic analysis instruments, and is the focus of current attention. How to ensure the success rate and reliability of flame ignition becomes the key point of research.
The flame ignition system in the prior art mainly comprises high-voltage discharge ignition, resistance wire heating ignition, ignition needle ignition and the like.
The high-voltage discharge ignition has the advantages of simple structure, low cost and the like, but has the problems of poor safety, serious electric interference, ultraviolet spectrum interference and the like. The resistance wire heating ignition structure is simple, the cost is low, but the resistance wire is easy to age, the corrosion resistance performance is poor, and the frequency of maintenance and replacement is high. The ignition needle has the advantages of simple structure, small volume and the like, but has the defects of influencing the stability of the flame and the atomizer temperature, poor controllability, low ignition success rate under extreme environmental conditions and the like because the actual power is small and the ignition needle needs to invade the flame to ignite.
Disclosure of Invention
The invention aims to provide a flame ignition device and a control method for an analytical instrument, which are used for solving the problems of low reliability, weak environmental adaptability, poor intelligent cooperative control and the like of the traditional ignition technology.
The invention provides a flame ignition device for an analytical instrument, comprising:
a power supply system composed of a switching power supply;
an ignition system consisting of a solid state relay and a glow plug;
a sensor system consisting of a current sensor, a glow plug temperature sensor, a flame sensor, an ambient temperature sensor, an atmospheric pressure sensor; a kind of electronic device with high-pressure air-conditioning system
The control system is respectively and electrically connected with the switching power supply, the solid-state relay, the current sensor, the glow plug temperature sensor, the flame sensor, the ambient temperature sensor and the atmospheric pressure sensor;
the heating area of the heating plug is equal to the top of the atomizer in height; the glow plug temperature sensor is arranged above the glow plug heating zone;
the positive electrode of the glow plug is sequentially connected with the current sensor, the output end of the solid-state relay and the positive electrode of the switching power supply; the negative electrode of the glow plug is connected with the negative electrode of the switching power supply;
the gas inlet of the atomizer is connected with a gas source; the shielding gas inlet of the atomizer is connected with a shielding gas source;
the flame sensor is arranged obliquely below the flame center position;
the current sensor is used for monitoring the working state of the glow plug in real time, the glow plug temperature sensor is used for monitoring the surface temperature of the glow plug, the flame sensor is used for monitoring whether flame is ignited or not, the atmospheric pressure sensor is used for acquiring atmospheric pressure data, and the environmental temperature sensor is used for acquiring environmental temperature data;
the control system is used for controlling the average ignition current, the ignition time and the ignition logic of the glow plug, and according to signals fed back by the sensor system, the intelligent control of the operation logic and the average power of the ignition system is realized by controlling the effective working time of the energizing of the solid state relay and combining the total working time.
Further, the maximum current of the solid state relay is 40A.
Further, the heating resistance of the glow plug is 0.2-5 omega, the working voltage is 10-20V, and the maximum instantaneous power is 300W.
Further, the distance between the heating area of the glow plug and the outside of the shielding gas passage of the atomizer is 0.5-10mm.
Further, the measuring range of the glow plug temperature sensor is room temperature-1500 ℃, the detecting wave band range of the flame sensor is 185-260nm, the measuring range of the atmospheric pressure sensor is 30-110KPa, and the measuring range of the environment temperature sensor is-40-125 ℃.
Further, the switching power supply is a direct current power supply.
Further, the average power of the ignition system is 10% -100% of the maximum power, and the working time is 1-30s.
The invention also provides a control method of the flame ignition device for the analytical instrument, which comprises the following steps:
controlling the fuel gas and shielding gas to enter the atomizer through a fuel gas inlet and a shielding gas inlet on the atomizer according to the set flow;
the control system acquires data of an atmospheric pressure sensor and an ambient temperature sensor, and converts the data of the atmospheric pressure sensor into altitude data;
the control system selects a preset ignition program and parameters according to the altitude and the environmental temperature data;
the control system controls the solid state relay to work according to the selected ignition program, so that the heating area at the front end of the glow plug is electrified and heated to the temperature capable of igniting flame.
Further, the control method further includes:
when the flame sensor detects that the flame is extinguished, the control system automatically repeats the selected ignition procedure, re-igniting the flame.
By means of the scheme, the flame ignition device and the control method for the analysis instrument take the glow plug as an ignition device, the control system is used for accurately controlling the average ignition current, the ignition time and the ignition logic of the glow plug, and meanwhile, intelligent ignition compensation is performed by combining data fed back by the sensor, so that the problems of low reliability, weak environmental adaptability, poor intelligent cooperative control and the like of a traditional ignition technology are solved, and the flame ignition device has the advantages of high ignition reliability, long service life, no electric and ultraviolet spectrum interference, simple structure and the like.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic view of a flame ignition device for an analytical instrument according to the present invention.
Reference numerals in the drawings:
1-a direct current power supply; 2-solid state relay; 3-a current sensor; 4-glow plugs; 41-glow plug positive electrode; 42-glow plug negative electrode; 43-glow plug heating zone; 5-glow plug temperature sensor; 6-flame; 7-flame sensor; 8-atomizer; 81-gas inlet; 82-shielding gas inlet; 83-atomizer tip; 84-outside the shielding gas channel; 9-a control system; 10-an ambient temperature sensor; 11-barometric pressure sensor.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Referring to fig. 1, the present embodiment provides a flame ignition device for an analytical instrument, comprising:
a power supply system composed of a switching power supply (direct current power supply 1);
an ignition system consisting of a solid state relay 2 and a glow plug 4;
a sensor system consisting of a current sensor 3, a glow plug temperature sensor 5, a flame sensor 7, an ambient temperature sensor 10, and an atmospheric pressure sensor 11;
the glow plug 4 is obliquely arranged on the atomizer 8, and the top end of the glow plug heating zone 43 is equal to the top end 83 of the atomizer in height; the glow plug temperature sensor 5 is installed above the glow plug heating zone 43;
the positive electrode 41 of the glow plug is sequentially connected with the current sensor 3, the output end of the solid state relay 2 and the positive electrode of the direct current power supply 1; the glow plug cathode 42 is connected with the cathode of the direct current power supply 1;
the gas inlet 81 of the atomizer 8 is connected with a gas source; the shielding gas inlet 82 of the atomizer 8 is connected with a shielding gas source;
the flame sensor 7 is arranged obliquely below the central position of the flame 6;
the control system 9 is powered by a switching power supply (dc power supply 1), and is electrically connected to the solid state relay 2, the current sensor 3, the glow plug temperature sensor 5, the flame sensor 7, the ambient temperature sensor 10, and the atmospheric pressure sensor 11, respectively.
The current sensor 3 is used for monitoring the working state of the glow plug in real time, the glow plug temperature sensor 5 is used for monitoring the surface temperature of the glow plug, the flame sensor 7 is used for monitoring whether flame is ignited or not, the atmospheric pressure sensor 11 is used for acquiring atmospheric pressure data, and the environmental temperature sensor 10 is used for acquiring environmental temperature data.
The control system 9 is used for controlling the average ignition current, the ignition time and the ignition logic of the glow plug, and according to signals fed back by the sensor system, the effective working time of the energizing of the solid state relay 2 is controlled, and the total working time is combined, so that the intelligent control of the working logic and the average power of the ignition system is realized.
The flame ignition device for the analytical instrument provided by the embodiment uses the glow plug as an ignition device, precisely controls the average ignition current, the ignition time and the ignition logic of the glow plug through the control system, and simultaneously combines the data fed back by the sensor to perform intelligent ignition compensation, so that the problems of low reliability, weak environmental adaptability, poor intelligent cooperative control and the like of the traditional ignition technology are solved, and the flame ignition device has the advantages of high ignition reliability, long service life, no electric and ultraviolet spectrum interference, simple structure and the like.
In the present embodiment, the maximum current of the solid state relay 2 is 40A.
In this embodiment, the heating resistance of the glow plug 4 is 0.2-5Ω, the operating voltage is 10-20V, and the maximum instantaneous power is 300W.
In this embodiment, the distance between the glow plug heating zone 43 and the outside 84 of the atomizer shielding gas passage is 0.5-10mm.
In this embodiment, the measuring range of the glow plug temperature sensor 5 is from room temperature to 1500 ℃.
In this embodiment, the detection band of the flame sensor 7 is 185-260nm.
In this embodiment, the atmospheric pressure sensor 11 measures 30-110KPa.
In this embodiment, the ambient temperature sensor 10 measures a range of-40-125 ℃.
In this embodiment, the average power of the ignition system is 10% -100% of the maximum power, and the working time is 1-30s.
The control method of the flame ignition device for the analytical instrument is as follows:
(1) The gas source of the fuel gas and the shielding gas is opened, the gas path system of the instrument is controlled, and the fuel gas and the shielding gas enter the atomizer through the fuel gas inlet and the shielding gas inlet on the atomizer according to the set flow.
(2) The control system collects data from the atmospheric pressure sensor and the ambient temperature sensor. The data of the barometric pressure sensor is converted into altitude data by the control system.
(3) The control system selects the ignition schedule and parameters as shown in table 1 based on altitude and ambient temperature.
Table 1 ignition procedure
(4) The control system controls the solid state relay to work according to the selected ignition program, and the heating area at the front end of the glow plug is heated to the temperature capable of igniting flame after being electrified.
(5) The current sensor is used for monitoring the working state of the glow plug in real time, the glow plug temperature sensor is used for monitoring the surface temperature of the glow plug, and the flame sensor is used for monitoring whether flame is ignited or not.
(6) When the flame sensor detects that the flame is extinguished, the control system automatically repeats the selected ignition procedure, re-igniting the flame.
The invention uses the glow plug as an ignition device, combines the accurate program control of the glow plug power, the intelligent feedback of the sensor and the accurate matching of the ignition program, realizes the high-reliability ignition of the flame of the analytical instrument, solves the problems of serious electric and ultraviolet spectrum interference, poor reliability, low environmental tolerance and the like of the traditional ignition technology, has the advantages of high intelligent degree, long ignition life and the like, and has better popularization and use values.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (9)
1. A flame ignition device for an analytical instrument, comprising:
a power supply system composed of a switching power supply;
an ignition system consisting of a solid state relay and a glow plug;
a sensor system consisting of a current sensor, a glow plug temperature sensor, a flame sensor, an ambient temperature sensor, an atmospheric pressure sensor; a kind of electronic device with high-pressure air-conditioning system
The control system is respectively and electrically connected with the switching power supply, the solid-state relay, the current sensor, the glow plug temperature sensor, the flame sensor, the ambient temperature sensor and the atmospheric pressure sensor;
the electric heating plug is obliquely arranged on the atomizer, and the top end of the heating area of the electric heating plug is equal to the top end of the atomizer in height; the glow plug temperature sensor is arranged above the glow plug heating zone;
the positive electrode of the glow plug is sequentially connected with the current sensor, the output end of the solid-state relay and the positive electrode of the switching power supply; the negative electrode of the glow plug is connected with the negative electrode of the switching power supply;
the gas inlet of the atomizer is connected with a gas source; the shielding gas inlet of the atomizer is connected with a shielding gas source;
the flame sensor is arranged obliquely below the flame center position;
the current sensor is used for monitoring the working state of the glow plug in real time, the glow plug temperature sensor is used for monitoring the surface temperature of the glow plug, the flame sensor is used for monitoring whether flame is ignited or not, the atmospheric pressure sensor is used for acquiring atmospheric pressure data, and the environmental temperature sensor is used for acquiring environmental temperature data;
the control system is used for controlling the average ignition current, the ignition time and the ignition logic of the glow plug, and realizing the intelligent control of the operation logic and the average power of the ignition system by controlling the effective working time of the electrifying of the solid-state relay and combining the total working time according to the signals fed back by the sensor system.
2. A flame ignition device for an analytical instrument as claimed in claim 1, wherein the maximum current of the solid state relay is 40A.
3. A flame ignition device for an analytical instrument as claimed in claim 1, wherein the heating resistance of the glow plug is 0.2-5 Ω, the operating voltage is 10-20V, and the maximum instantaneous power is 300W.
4. A flame ignition device for an analytical instrument according to claim 1, wherein the distance between the glow plug heating zone and the outside of the atomizer shielding gas passage is 0.5-10mm.
5. A flame ignition device for an analytical instrument according to claim 1, wherein the measurement range of the glow plug temperature sensor is from room temperature to 1500 ℃, the detection band range of the flame sensor is from 185 to 260nm, the measurement range of the atmospheric pressure sensor is from 30 to 110KPa, and the measurement range of the ambient temperature sensor is from-40 to 125 ℃.
6. A flame ignition device for an analytical instrument as recited in claim 1, wherein said switching power supply is a dc power supply.
7. A flame ignition device for an analytical instrument as claimed in claim 1, wherein the ignition system has an average power of 10-100% of maximum power and a working time of 1-30s.
8. A control method of a flame ignition device for an analytical instrument as set forth in claim 1, comprising:
controlling the fuel gas and shielding gas to enter the atomizer through a fuel gas inlet and a shielding gas inlet on the atomizer according to the set flow;
the control system acquires data of an atmospheric pressure sensor and an ambient temperature sensor, and converts the data of the atmospheric pressure sensor into altitude data;
the control system selects a preset ignition program and parameters according to the altitude and the environmental temperature data;
the control system controls the solid state relay to work according to the selected ignition program, so that the heating area at the front end of the glow plug is electrified and heated to the temperature capable of igniting flame.
9. The control method according to claim 8, characterized by further comprising:
when the flame sensor detects that the flame is extinguished, the control system automatically repeats the selected ignition procedure, re-igniting the flame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810512582.XA CN108762119B (en) | 2018-05-25 | 2018-05-25 | Flame ignition device for analytical instrument and control method |
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| CN201810512582.XA CN108762119B (en) | 2018-05-25 | 2018-05-25 | Flame ignition device for analytical instrument and control method |
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| CN108762119B true CN108762119B (en) | 2023-04-25 |
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| CN110081607B (en) * | 2019-03-28 | 2021-01-19 | 青岛经济技术开发区海尔热水器有限公司 | Control method and control system of gas water heater and gas water heater |
| CN111141504B (en) * | 2019-12-25 | 2022-04-15 | Oppo（重庆）智能科技有限公司 | Fire-break detection method and device and computer readable storage medium |
| CN111237804A (en) * | 2020-01-09 | 2020-06-05 | 合肥科晶材料技术有限公司 | Full-automatic combustible gas on-line monitoring tail gas ignition device |
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