CN2695969Y - Integral zirconium oxide smoke oxygen analyzer - Google Patents
Integral zirconium oxide smoke oxygen analyzer Download PDFInfo
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- CN2695969Y CN2695969Y CN 200420026977 CN200420026977U CN2695969Y CN 2695969 Y CN2695969 Y CN 2695969Y CN 200420026977 CN200420026977 CN 200420026977 CN 200420026977 U CN200420026977 U CN 200420026977U CN 2695969 Y CN2695969 Y CN 2695969Y
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Abstract
The utility model relates to an integral zirconia smoke oxygen analyzer which relates to an oxygen content in smoke online analytical device which integrates a zirconia oxygen detector and a convertor. The zirconia oxygen detector has a detector pipe body. The front end of the inner of the detector pipe body is provided with a stainless steel dustproof net, a porous ceramics dustproof piece, a zirconia oxygen sensor, a heating electric furnace and a temperature thermocouple. A standard gas pipe and a reference gas pipe are passed through the inner of the detector pipe body. The rear part of the detector pipe body is provided with a mounting flange, and the end part is provided with a connecting flange. The outer end face of the connecting flange is used for connecting with the casing body seat of the convertor. The convertor is provided with the casing body seat which is arranged on a casing body hood. The inner of the casing body hood is provided with a changeover circuit mounting plate. The socket of the circuit plate is inserted with the circuit plate for processing the associated circuit of oxygen signal. The changeover circuit comprises a power supply part, a temperature measurement and heating temperature control part, an oxygen amount measurement and the changeover circuit.
Description
Technical field
What the utility model integrated oxidization zirconium flue gas oxygen analyzer related to is oxygen content online analytical instrument in a kind of zirconium oxide-oxygen detecting device and the incorporate flue gas of converter.
Background technology
Coat suitable electrode wires with tubular zirconium-oxide and make lambda sensor, by certain physical construction and optional equipment and satisfy its condition of work, formation can change oxygen content into the oxygen amount/coulometric detector of respective electrical magnitude relation; Convert nonlinear oxygen amount/electric weight relation to the percentage oxygen content data of linear readability and 4 ~ 20mA corresponding current of standard by corresponding electronic circuit again, export to various register instruments or smart machine, adjusting is read and monitored to realization to unknown oxygen content, Here it is zirconium doxide oxygen analyzer.The flue gas oxygen analyzer is to be mainly used in the online analytical instrument through burning, absorption, reacted remaining oxygen content that reads, monitors in each class A furnace A, station boiler, kiln, the chemical-reacting furnace (still).
Zirconia flue gas oxygen analyzer is widely used in oil, chemical industry, and petroleum pipe line is carried, metal smelt, and thermal power generation is in various heating furnaces, boiler, kiln, chemical-reacting furnace (still) equipment such as pottery, cement sintering and concentrated supply of heating in the city.Through its monitoring to oxygen content in the flue gas, thus with device control at optimal combustion state, to reach fuel savings, improve the quality of products, the steady economical operation of opertaing device prolongs service life of equipment; Also can reduce smoke evacuation " blackness " simultaneously, reduce dust and SO
2Etc. the emission of harmful substances amount, play energy-saving and cost-reducing and multiple effect such as protection environment.
Existing zirconia flue gas oxygen analyzer is made up of the two parts that separate, i.e. oxygen detector (being commonly called as probe) and oxygen converter (being commonly called as secondary table, transmitter).During use, detecting device is installed on the body of heater, its body inserts detected part in the body of heater; Converter then is installed in the other local meter specially install bin that is provided with, or is installed in the operation pulpit away from equipment.Distance is closely then several meters between the two, far then reaches three, 400 meters, therebetween by power supply, add the 6 pairs of cables such as heat control, oxygen signal, thermopair, temperature compensation, output signal and connect.
The weak point of the zirconia flue gas oxygen analyzer of existing form is:
1, install at two places, undesired signal by the lead introducing, make instrument can not realize steadily normal operation, for this reason, must expensive energy go to improve " anti-interference " performance of instrument, require the user to use expensive shielded cable, take remedial measuress such as the strong and weak signals line connects up respectively, make instrument become very " fragile ".
2, install at two places, has strengthened the workload and the expenses such as equipment and materials, construction of installing, and in addition, debugging, maintainer must operate at two places, so just bring great inconvenience to operate as normal.
3, in the erecting stage of oil, chemical industry unit, separate the converter of installing and also want explosion-proof xegregating unit, as " inflatable malleation flame proof instrument box ", and the requirement of this class antiknock device and price all are very expensive, therefore, cause the user installation expense significantly to increase.
4, in recent years, along with the raising of science and technology, the requirement of business administration is also thereupon to higher development.More and more enterprises has been upgraded original control technique and equipment, and (as the DCS system) replaced original numerous secondary instrument and artificial regulatory mode with the mainframe computer robot control system(RCS), and this just makes converter not have " place " in the pulpit.
Summary of the invention
The utility model provides a kind of integrated oxidization zirconium flue gas oxygen analyzer at above-mentioned weak point, behind the zirconium oxide-oxygen detecting device and the technical finesse of converter process that originally separated, makes it to be associated in becoming one instrument together.So not only realize the basic function of instrument better, and simplify apparatus structure, eliminate circuit and disturb influence, save the erecting equipment expense, simultaneously more convenient user's operation and maintenance the instrument work stability and reliability.
Integrated oxidization zirconium flue gas oxygen analyzer takes following scheme to realize: integrated oxidization zirconium flue gas oxygen analyzer structure is made of zirconium oxide-oxygen detecting device, converter, zirconium oxide-oxygen detecting device and converter the becoming one instrument that connects together.The zirconium oxide-oxygen detecting device has the detecting device body, the front end of detecting device body inside is equipped with stainless steel Air Filter, porous ceramics dustproof sheet, Zirconium oxide oxygen sensor and adds electrothermal stove and temperature thermocouple for what tubular zirconium-oxide provided the hot operation condition, standard tracheae and the reference tracheae in addition that run through detecting device body inside, detecting device body rear portion are provided with standard gas inlet, reference gas inlet.Be provided with the oxygen electrode lead-in wire in the detecting device body, add electrothermal stove lead-in wire and thermocouple lead, they are all led in the housing seat by the rearward end of detecting device body.Detecting device body posterior means has mounting flange, is used to be installed in equipment under test.Detecting device body rearward end is provided with joint flange, and the outer face of joint flange is used for linking to each other with the housing seat of converter.Converter has the housing seat, and device has case cover on the housing seat, and case cover is equipped with inlet, outlet, is used to feed pressurized air, and is equipped with into and out of the line mouth.Be provided with the change-over circuit installing plate in the case cover, also be provided with PCB socket and power supply terminal, output signal connection terminal on the circuit installing plate, on PCB socket, be plugged with the circuit board of the interlock circuit of handling oxygen signal.Circuit board is provided with two, and one for power of alterating and direct current exchange with to functional circuits such as the heating of the electric furnace in detecting device temperature controls, and another piece is functional circuits such as the measurement processing, demonstration, voltage/current conversion of oxygen signal.
Change-over circuit is made up of power unit, temperature survey and heating temperature control part, oxygen content measurement and change-over circuit.
Power unit is made up of switch power module, DC-DC power converter DC/DC.Switch power module comprises switch power module IC300, IC301, IC302.DC-DC power converter DC/DC is made of IC303.Switch power module IC300, IC301 input end link to each other with the alternating current 220V civil power, export two groups of positive and negative 5V direct supplys of isolating mutually, make detection, temperature control circuit power supply.Switch power module IC302 input end links to each other with the alternating current 220V civil power, output terminal output direct current 24V power supply, as 4～20 milliamperes of constant-current source circuit power supplies, output terminal links to each other with DC/DC DC power convertor IC303 input end simultaneously, output terminal output ± 5V the direct supply of this transducer, the D/A converter of supplying with after isolating uses.
Temperature survey and heating temperature control part are made up of thermocouple measurement circuit, ambient temperature measurement circuit, adder circuit, working temperature comparer, thyristor gating circuit, overtemperature prote comparer, overtemperature prote thyristor gating circuit.
The thermocouple measurement circuit comprises thermopair K, operational amplifier IC100.Ambient temperature measurement circuit comprises ambient temperature measurement sensor T, operational amplifier IC101A.Adder circuit comprises operational amplifier IC101B.The working temperature comparer comprises working temperature setting potentiometer W103, operational amplifier IC102A.The overtemperature prote comparer comprises operational amplifier IC102B.Thyristor gating circuit comprises working temperature thyristor gating circuit IC103, photoelectricity isolation trigger IC105, controllable silicon KG101.The overtemperature prote thyristor gating circuit comprises transistor Q3, photoelectronic coupler IC104, controllable silicon KG100.
Oxygen content measurement and change-over circuit comprise Zirconium oxide oxygen sensor O
2, operational amplifier IC200, IC201, A/D converter IC202, latch IC203, IC204, IC205, IC206, can wipe memory IC207, IC208, IC209, code translator IC210, IC211, IC212, inverter ic 217, charactron S201, S202, S203, photoelectronic coupler IC213, IC214, IC218, D/A converter IC215, operational amplifier IC216, transistor Q2 and crystal diode, electric capacity, resistance.
Principle of work and advantage: after the detecting device body portion was fit into equipment under test, by start, after the preheating of heating, sensor progressed into stationary operational phase.Oxygen content in the tested gas in the content of oxygen and the reference gas of being introduced by the outside (air) draws corresponding oxygen electric potential signal after the Zirconium oxide oxygen sensor contrast; This signal is gone between through oxygen electrode by sensor, reaches the interlock circuit that connects on the housing seat; Circuit according to the nernst equation computing after, change the percentage oxygen content into, show with digital form by the display device on the circuit board; Simultaneously circuit is converted into the normalized current signal of 4～20mA according to these data, sends computer center to, to be provided as the foundation of regulation and control.
With respect to split type zirconia flue gas oxygen analyzer, have the following advantages after integrated:
1, utilizes the detecting device mounting flange that is provided with on original subscriber equipment, can realize whole installment works of instrument, no longer need to be provided with in addition instrument install bin, panel board (cabinet), make installation very simple, convenient.
2, original requisite 6 pairs of tie cables reduce to 2 to (power lead, 4～20mA output line), not only saved fund, and have significantly reduced the workload of construction, maintenance.
3, from having eliminated of the influence of the long undesired signal of bringing apart from going between in essence to feeble signal.
4, adopted the microdiecast Al-alloy casing, as the Instrument shell of circuit part, the complete machine good airproof performance can be resisted inclement weathers such as rain, snow, dust storm and corrosive gas to the infringement of instrument electronic devices and components, connector, makes instrument work more stable, reliable.
Description of drawings
The utility model is described in further detail below with reference to accompanying drawing.
Fig. 1 is an integrated oxidization zirconium flue gas oxygen analyzer structural representation.
Fig. 2 is the power unit schematic diagram of the utility model change-over circuit.
Fig. 3 is the temperature survey and the heating temperature control part schematic diagram of the utility model change-over circuit.
Fig. 4 is the oxygen content measurement and the change-over circuit schematic diagram of the utility model change-over circuit.
Embodiment
With reference to accompanying drawing 1, integrated oxidization zirconium flue gas oxygen analyzer structure has zirconium oxide-oxygen detecting device, converter.Zirconium oxide-oxygen detecting device and converter fuse.The zirconium oxide-oxygen detecting device has elongated tubular and partly is called detecting device body 5, is made of industrial stainless-steel tube.Its inner leading section is equipped with stainless steel Air Filter, porous ceramics dustproof sheet and Zirconium oxide oxygen sensor 4, and adds electrothermal stove 2 and temperature thermocouple 3 for what tubular zirconium-oxide provided the hot operation condition.
Standard tracheae and the reference tracheae in addition that run through body inside.The standard tracheae is need establish for the demarcation of instrument, and it passes whole detecting device body 5 at the leading section opening by 5 back ministerial standard gas inlet 8 beginnings of detecting device body, by demarcating gas bend pipe 1 with in the standard gas introducing tubular zirconium-oxide 4, realizes the calibration request of instrument; The reference tracheae is the special pipeline of establishing for reference gas being provided for tubular zirconium-oxide 4, and it also is that ad hoc from the rear portion of detecting device body 5 " reference gas port 7 " enters in the body, reference gas is delivered to the top in tubular zirconium-oxide 4 outsides by special pipeline.
Be provided with the oxygen electrode lead-in wire in the detecting device body 5, add electrothermal stove lead-in wire and thermocouple lead, they are all led in the housing seat 12 by the rearward end of detecting device body 5.
The rearward end of detecting device body 5 is welded with joint flange 9.The outer face of joint flange 9 is in order to connect with housing seat 12; itself and detecting device body 5 welding one face down bonding have rain cover 10; have the reference gas outlet on the detecting device body 5 in rain cover 10 protection domains, so just prevented that rainwater from flowing in the detecting device body 5 from the outlet of reference gas.
On the outside surface at the about 140mm of detecting device body 5 rearward end place, be welded with mounting flange 6.Its leading section inserts in the equipment under test by the same size flange center that is provided with on the subscriber equipment, with fastening bolt the mounting flange on mounting flange on the detecting device body 56 and the subscriber equipment is linked, finish whole installment works of integrated oxidization zirconium flue gas oxygen analyzer.
The rounded flat plate-like of housing seat 12 outward appearances, its open side place disc is provided with screw thread, in order to link with case cover 14; The flange coupling bolt hole is left in the bottom, links in order to the connecting flange 9 with detecting device body 5 rearward end.
Converter is provided with the circuit installing plate in housing seat 12, to accept the various electric signal that the detecting device front end imports into and the power supply that adds electrothermal stove is provided; Also be provided with PCB socket and power supply terminal, output signal connection terminal on the circuit installing plate, in order to connect with circuit board 13; On PCB socket, be plugged with the circuit board 13 of the interlock circuit of handling oxygen signal.Circuit board 13 has two, and one is power of alterating and direct current conversion and to functional circuits such as the heating of the electric furnace in the detecting device, temperature controls; Another piece is functional circuits such as the measurement processing, demonstration, voltage/current conversion of oxygen signal.
The bottom of housing seat 12 is provided with power lead import and the outlet of 4 ~ 20mA standard signal line, as the import and export passage 15 of power supply and 4 ~ 20mA output line.
One upper lateral part of housing seat 12 and detecting device body connecting flange 9 is provided with respectively one of inlet, outlet 11, in order to feed pressurized air, reduces the interior temperature of housing and is in barotropic state in the housing with making, and reaches extraneous gas and can not enter the interior purpose of housing.
With reference to Fig. 2～4, the change-over circuit of integrated oxidization zirconium flue gas oxygen analyzer is made up of power unit, temperature survey and heating temperature control part, oxygen content measurement and change-over circuit.
Power unit is made up of switch power module, DC-DC power converter DC/DC.Switch power module comprises switch power module IC300, IC301, IC302.DC-DC power converter DC/DC is made of IC303.Switch power module IC300, IC301 input end link to each other with the alternating current 220V civil power, export two groups of positive and negative 5V direct supplys of isolating mutually, make detection, temperature control circuit power supply.Switch power module IC302 input end links to each other with the alternating current 220V civil power, output terminal output direct current 24V power supply, as 4～20 milliamperes of constant-current source circuit power supplies, output terminal links to each other with DC/DC DC power convertor IC303 input end simultaneously, output terminal output ± 5V the direct supply of this transducer, the D/A converter of supplying with after isolating uses.
Temperature survey and heating temperature control part are made up of thermocouple measurement circuit, ambient temperature measurement circuit, adder circuit, working temperature comparer, thyristor gating circuit, overtemperature prote comparer, overtemperature prote thyristor gating circuit.
The thermocouple measurement circuit comprises thermopair K, operational amplifier IC100.Ambient temperature measurement circuit comprises ambient temperature measurement sensor T, operational amplifier IC101A.Adder circuit comprises operational amplifier IC101B.The working temperature comparer comprises working temperature setting potentiometer W103, operational amplifier IC102A.The overtemperature prote comparer comprises operational amplifier IC102B.Thyristor gating circuit comprises working temperature thyristor gating circuit IC103, photoelectricity isolation trigger IC105, controllable silicon KG101.The overtemperature prote thyristor gating circuit comprises transistor Q3, photoelectronic coupler IC104, controllable silicon KG100.
The positive signal end of thermopair links to each other with 2 pin of operational amplifier IC100 in the circuit, the negative terminal of thermopair K links to each other with 3 pin of operational amplifier IC100,6 pin of operational amplifier IC100 link to each other with 6 pin of totalizer IC101B by resistance R 105, the positive pole of ambient temperature measurement sensor T links to each other with positive 5V direct supply, the negative pole of ambient temperature measurement sensor T links to each other with ground by potentiometer W101, the negative pole of ambient temperature measurement sensor T links to each other with 2 pin of operational amplifier IC101A by resistance R 114 simultaneously, and 3 pin of operational amplifier IC101A are by resistance R 115 ground connection.
Operational amplifier IC101A output pin links to each other with 6 pin of operational amplifier IC101B by resistance R 106; 7 pin of operational amplifier IC101B link to each other with 2 pin of the operational amplifier IC102A of working temperature comparer by resistance R 122; 7 pin of operational amplifier IC101B link to each other with 5 pin of the operational amplifier IC102B of overtemperature prote comparer by resistance R 120 simultaneously; 3 pin of operational amplifier IC102A connect the moving contact of potentiometer W103; 6 pin of operational amplifier IC102B are by resistance R 122; R118 links to each other with the negative terminal of stabilivolt Z100; the output pin of operational amplifier IC102A is that 1 pin is by 4 pin of resistance 124 with the IC103 of thyristor gating circuit; 1 pin links to each other; photoelectricity is isolated the 2 pin ground connection of trigger IC105; 6 pin that photoelectricity is isolated trigger IC105 link to each other with the negative electrode of controllable silicon KG100 and the anode of controllable silicon KG101 by resistance R 131; 4 pin that photoelectricity is isolated trigger IC105 link to each other with the trigger electrode of controllable silicon KG101; the negative electrode of controllable silicon KG101 links to each other with load electric furnace RL one end, and the other end of load electric furnace RL links to each other with AC power 220V.
The output pin of the operational amplifier IC102B of overtemperature prote comparer i.e. 1 pin links to each other with the base stage of transistor Q3 by diode D102, resistance R 128; the grounded emitter of transistor Q3; the collector of Q3 connects positive 5V power supply by resistance R 217; the collector of Q3 connects 1 pin that photoelectricity is isolated coupling device IC104 simultaneously; the 2 pin ground connection of IC104; 6 pin of IC104 link to each other with the anode of controllable silicon KG100 by resistance R 129; and connecing the alternating current 220V power supply, the trigger electrode that 4 pin of IC104 meet controllable silicon KG100 links to each other.
Oxygen content measurement and change-over circuit comprise Zirconium oxide oxygen sensor O
2, operational amplifier IC200, IC201, A/D converter IC202, latch IC203, IC204, IC205, IC206, can wipe memory IC207, IC208, IC209, code translator IC210, IC211, IC212, inverter ic 217, charactron S201, S202, S203, photoelectronic coupler IC213, IC214, IC218, D/A converter IC215, operational amplifier IC216, transistor Q2 and crystal diode, electric capacity, resistance.
Zirconium oxide oxygen sensor O
2The positive signal end link to each other with 2 pin of operational amplifier IC200 by resistor R 200.
Zirconium oxide oxygen sensor O
2The negative signal end link to each other with 3 pin of operational amplifier IC200 by resistance R 201.Output terminal 6 pin of IC200 link to each other with 2 pin of operational amplifier IC201 by resistance R 204, output terminal 1 pin of IC201 links to each other with 3 pin of A/D converter IC202 by resistor R 212, the 1 pin ground connection of IC202,20,21,22,23 pin of IC202 link to each other with 4,7,13,14 pin of latch IC203, IC204, IC205, IC206 respectively.19 pin of A/D converter IC202 link to each other with 5 pin of latch IC206,18 pin of IC202 link to each other with 5 pin of latch IC205,17 pin of IC202 link to each other with 5 pin of latch IC204, and 16 pin of IC202 link to each other with 5 pin of latch IC203, and link to each other with 1 pin of inverter ic 217 simultaneously.2,10,11,1 pin of latch IC203 links to each other with 10,9,8,7 pin that can wipe memory IC207, IC208, IC209 respectively, 2,10,11,1 pin of latch IC204 links to each other with 6,5,4,3 pin that can wipe memory IC207, IC208, IC209 respectively, 2,10,11,1 pin of latch IC205 links to each other with 25,24,21,23 pin that can wipe memory IC207, IC208, IC209 respectively, and 15 pin of latch IC206 link to each other with 2 pin that can wipe memory IC207, IC208, IC209.Can wipe 16 of memory IC207,17,18,19 pin respectively with 7 of code translator IC210,1,2,6 pin link to each other, can wipe 11 of memory IC207,12,13,15 pin respectively with 7 of code translator IC211,1,2,6 pin link to each other, can wipe 16 of memory IC208,17,18,19 pin respectively with 7 of code translator IC212,1,2,6 pin link to each other, 15 pin of IC208 link to each other with 5 pin of inverter ic 217,6 pin of IC217 link to each other with 7 pin of charactron S203,13 pin of IC208 link to each other with 3 pin of inverter ic 217, and 4 pin of IC217 link to each other with 7 pin of charactron S204.13,12,11,10,9,15,14 pin of code translator IC210 link to each other with 10,9,8,5,4,2,3,7 pin of charactron S202 respectively.1,6,7 pin of 1,6 pin of charactron S203,1,6 pin of S202, S201 are respectively by linking to each other with positive 5V power supply behind current-limiting resistance R239, R240, the R241.
11,12,13,15 pin that can wipe memory IC209 link to each other with 1,3,5,7 pin of photoelectronic coupler IC213 by resistance R 215, R216, R217, R218 respectively, and 16,17,18,19 pin of IC209 link to each other with 1,3,5,7 pin of photoelectronic coupler IC214 by resistance R 219, R200, R211, R222 respectively.Ground connection after 2,4,6, the 8 pin parallel connections of photoelectronic coupler IC213, IC214,10,12,14,16 pin of photoelectronic coupler IC214 are respectively by linking to each other with positive 5V power supply behind pull-up resistor R223, R225, R227, R229, R231, R233, R235, the R237,15,13,11,9 pin of photoelectronic coupler IC213 link to each other with 7,6,5,4 pin of D/A converter IC215 respectively, and 15,13,11,9 pin of photoelectronic coupler IC214 link to each other with 16,15,14,13 pin of D/A converter IC215 respectively.2 pin of inverter ic 217 link to each other with 1 pin of photoelectronic coupler IC218 by resistance R 242, the 2 pin ground connection of photoelectronic coupler IC218,4 pin of photoelectronic coupler IC218 connect positive 5V power supply after by resistance R 244, and its 3 pin links to each other with 1,2 pin of D/A converter IC215.11,12 pin of IC215 link to each other with 2,3 pin of operational amplifier IC216 respectively, 1 pin of IC216A links to each other with 5 pin of operational amplifier IC216B by resistance R 249 backs, 3 pin of IC216B link to each other with potentiometer center swing arm by resistance R 248, and 7 pin of IC216B link to each other with the base stage of transistor Q2 by resistance R 251.After the emitter of Q2 passed through resistance R 253, R254, R255, R256, an end linked to each other with 5 pin of IC216B by resistance R 252 backs, and the other end is by crystal diode D202 and capacitor C 212 back ground connection.
The change-over circuit principle of work:
One, power unit: the effect of this partial circuit is that each electronic devices and components for instrument provide power supply.It is by the switch power module of the switch power module of the input of two (switch power module IC300, IC301) general 220V alternating current, output direct current ± 5V/300mA and (switch power module IC3002) 220V alternating current input, output direct current 24V, the DC/DC DC power convertor (IC3003) of direct current 24V input, output direct current ± 5V constitutes, with realize that output is isolated mutually ± 5V direct supply, 24V direct supply and with 24V direct supply another group ± 5V direct supply altogether.
Two, temperature survey and heating temperature control part
By K type thermopair with the temperature thermoelectrical potential that records after IC100 operational amplifier processing and amplifying, make it to be enlarged into 2mV/ ℃.
The ambient temperature signal that is recorded by temperature sensor AD 590 also is 2mV/ ℃ after the IC101A processing and amplifying.The adder circuit of forming by IC101B with amplify after the addition of thermopair electromotive force, realize the The Cold-Junction Compensation for Thermocouple effect.
To have cold junction compensation and the thermopair electromotive force after amplifying is divided into two-way.One the road delivers to 2 pin of IC102A, 3 pin of IC102A are working temperature values of setting, compare through the comparer that IC102A forms, utilize this comparative result after IC103 and IC105 handle, to go to control the break-make of controllable silicon KG101, to realize the accurate control of design temperature; 5 pin of IC102B are delivered on another road; 6 pin of IC102B are overtemperature prote temperature values of setting; the comparer of forming via IC102B relatively after; go to control the break-make of controllable silicon KG100 again via triode Q3 and IC104; when being implemented in, disconnect the purpose of heating power supply above the certain allowance of design temperature.
Three, oxygen content measurement and change-over circuit
By the detected oxygen electric potential signal of Zirconium oxide oxygen sensor, deliver to 2 pin and 3 pin of operational amplifier IC200, after the range correction, deliver to 2 pin of operational amplifier IC201, again by the correction of returning to zero of the 3 pin zeroing circuits of IC201, to deliver to 3 pin of IC202 (A/D converter) through the oxygen electric potential signal of zero crossing and range correction at last, after this circuit conversion, promptly realized analog quantity oxygen electromotive force is converted into digital quantity.
Digital quantity by IC202 (A/D converter) output is divided into two-way behind the latch that IC203, IC204, IC205, IC206 form.One the road delivers to IC207, IC208 (memory), and the oxygen electric potential signal of the digitizing log characteristic that enters after the data processing that this memory writes in advance, when this signal of output, has realized that promptly log characteristic becomes the conversion of percentage linearity.This signal is delivered to the percentage registration that the digital indicator of being made up of S201, S202, three charactrons of S203 shows oxygen content after IC210, IC211, the common decoder for decoding of forming of IC212 are handled; Another road is that the oxygen electric potential signal of digitizing log characteristic is sent into IC209 (memory), after the data processing that this memory writes in advance, makes it to export the linear digital signal that is fit to be converted to 0～4V.This signal is behind the photoisolator that IC213, IC214 form, deliver to IC215 (D/A converter), after the IC215 conversion, digitized linear oxygen signal becomes the simulation oxygen signal of 0 linear～4V again, after the constant-current source circuit that this signal is formed via IC216A, IC216B and Q2 is again handled, just can obtain and the corresponding 4～20mA current signal of percentage oxygen content at the C212 two ends.
In the change-over circuit, switch power module IC300, IC301 can adopt alternating current 220V/± the 5V power module, switch power module IC302 can adopt alternating current 220V/24V switch power module; DC power convertor IC303 can adopt SR24DS/100.
Operational amplifier IC100 can adopt the 0P07 integrated operational amplifier, and operational amplifier IC101A, 101B, IC102A, IC102B can adopt the LM158 integrated operational amplifier.Thyristor gating circuit IC103 can adopt the NE555 integrated chip, and photoelectronic coupler IC104, IC105 can adopt the MC3041 integrated chip.Controllable silicon KG100, KG101 can adopt BTA20 controllable silicon etc.
Operational amplifier IC200 can adopt the 0P07 integrated operational amplifier, and operational amplifier IC201, IC216A, IC216B can adopt the LM158 integrated operational amplifier.A/D converter IC202 can adopt the MC14433 chip.Latch IC203, IC204, IC205, IC206 can adopt the CD4042 chip.Can wipe memory IC207, IC208, IC209 can adopt the 27C64 chip.Code translator IC210, IC211, IC212 can adopt the 74LS247 chip.Photoelectronic coupler IC213, IC214 can adopt the TLP521-4 chip.D/A converter IC215 can adopt the DAC0832 chip.
Claims (5)
1, a kind of integrated oxidization zirconium flue gas oxygen analyzer, has the zirconium oxide-oxygen detecting device, converter, it is characterized in that zirconium oxide-oxygen detecting device and converter the becoming one that connect together, the zirconium oxide-oxygen detecting device has the detecting device body, the front end of detecting device body inside is equipped with the stainless steel Air Filter, the porous ceramics dustproof sheet, Zirconium oxide oxygen sensor and add electrothermal stove and temperature thermocouple for what tubular zirconium-oxide provided the hot operation condition, standard tracheae and the reference tracheae in addition that run through detecting device body inside, be provided with the oxygen electrode lead-in wire in the detecting device body, add electrothermal stove lead-in wire and thermocouple lead, detecting device body posterior means has mounting flange, detecting device body rearward end is provided with joint flange, the outer face of joint flange is used for linking to each other with the housing seat of converter, converter has the housing seat, device has case cover on the housing seat, case cover is equipped with into, the gas outlet, and be equipped with into, line outlet, be provided with the change-over circuit installing plate in the case cover, the circuit installing plate is provided with PCB socket and power supply terminal, the output signal connection terminal is plugged with the circuit board of the interlock circuit of handling oxygen signal on PCB socket;
Change-over circuit is made up of power unit, temperature survey and heating temperature control part, oxygen content measurement and change-over circuit; Power unit is made up of switch power module, DC-DC power converter DC/DC; Temperature survey and heating temperature control part are by the thermocouple measurement circuit, ambient temperature measurement circuit, adder circuit, the working temperature comparer, thyristor gating circuit, the overtemperature prote comparer, the overtemperature prote thyristor gating circuit is formed, the thermocouple measurement circuit comprises thermopair K, operational amplifier IC100, ambient temperature measurement circuit comprises ambient temperature measurement sensor T, operational amplifier IC101A, adder circuit comprises operational amplifier IC101B, the working temperature comparer comprises working temperature setting potentiometer W103, operational amplifier IC102A, the overtemperature prote comparer comprises operational amplifier IC102B, thyristor gating circuit comprises working temperature thyristor gating circuit IC103, photoelectricity is isolated trigger IC105, controllable silicon KG101, the overtemperature prote thyristor gating circuit comprises transistor Q3, photoelectronic coupler IC104, controllable silicon KG100; Oxygen content measurement and change-over circuit comprise Zirconium oxide oxygen sensor O2, operational amplifier IC200, IC201, A/D converter IC202, latch IC203, IC204, IC205, IC206, can wipe memory IC207, IC208, IC209, code translator IC210, IC211, IC212, inverter ic 217, charactron S201, S202, S203, photoelectronic coupler IC213, IC214, IC218, D/A converter IC215, operational amplifier IC216, transistor Q2 and crystal diode.
2, integrated oxidization zirconium flue gas oxygen analyzer according to claim 1, the positive signal end of thermopair links to each other with 2 pin of operational amplifier IC100 in it is characterized in that temperature survey and heating the temperature control partial circuit, the negative terminal of thermopair K links to each other with 3 pin of operational amplifier IC100,6 pin of operational amplifier IC100 link to each other with 6 pin of totalizer IC101B by resistance R 105, the positive pole of ambient temperature measurement sensor T links to each other with positive 5V direct supply, the negative pole of ambient temperature measurement sensor T links to each other with ground by potentiometer W101, the negative pole of ambient temperature measurement sensor T links to each other with 2 pin of operational amplifier IC101A by resistance R 114 simultaneously, and 3 pin of operational amplifier IC101A are by resistance R 115 ground connection;
Operational amplifier IC101A output pin links to each other with 6 pin of operational amplifier IC101B by resistance R 106,7 pin of operational amplifier IC101B link to each other with 2 pin of the operational amplifier IC102A of working temperature comparer by resistance R 122,7 pin of operational amplifier IC101B link to each other with 5 pin of the operational amplifier IC102B of overtemperature prote comparer by resistance R 120 simultaneously, 3 pin of operational amplifier IC102A connect the moving contact of potentiometer W103,6 pin of operational amplifier IC102B are by resistance R 122, R118 links to each other with the negative terminal of stabilivolt Z100, the output pin of operational amplifier IC102A is that 1 pin is by 4 pin of resistance 124 with the IC103 of thyristor gating circuit, 1 pin links to each other, photoelectricity is isolated the 2 pin ground connection of trigger IC105,6 pin that photoelectricity is isolated trigger IC105 link to each other with the negative electrode of controllable silicon KG100 and the anode of controllable silicon KG101 by resistance R 131,4 pin that photoelectricity is isolated trigger IC105 link to each other with the trigger electrode of controllable silicon KG101, the negative electrode of controllable silicon KG101 links to each other with load electric furnace RL one end, and the other end of load electric furnace RL links to each other with AC power 220V;
The output pin of the operational amplifier IC102B of overtemperature prote comparer i.e. 1 pin links to each other with the base stage of transistor Q3 by diode D102, resistance R 128; the grounded emitter of transistor Q3; the collector of Q3 connects positive 5V power supply by resistance R 217; the collector of Q3 connects 1 pin that photoelectricity is isolated coupling device IC104 simultaneously; the 2 pin ground connection of IC104; 6 pin of IC104 link to each other with the anode of controllable silicon KG100 by resistance R 129; and connecing the alternating current 220V power supply, the trigger electrode that 4 pin of IC104 meet controllable silicon KG100 links to each other.
3, integrated oxidization zirconium flue gas oxygen analyzer according to claim 1 is characterized in that the positive signal end of Zirconium oxide oxygen sensor O2 in oxygen content measurement and the change-over circuit links to each other with 2 pin of operational amplifier IC200 by resistor R 200; The negative signal end of Zirconium oxide oxygen sensor O2 links to each other with 3 pin of operational amplifier IC200 by resistance R 201, output terminal 6 pin of IC200 link to each other with 2 pin of operational amplifier IC201 by resistance R 204, output terminal 1 pin of IC201 links to each other with 3 pin of A/D converter IC202 by resistor R 212, the 1 pin ground connection of IC202,20 of IC202,21,22,23 pin respectively with latch IC203, IC204, IC205,4 of IC206,7,13,14 pin link to each other, 19 pin of A/D converter IC202 link to each other with 5 pin of latch IC206,18 pin of IC202 link to each other with 5 pin of latch IC205,17 pin of IC202 link to each other with 5 pin of latch IC204,16 pin of IC202 link to each other with 5 pin of latch IC203, and link to each other with 1 pin of inverter ic 217 simultaneously, 2 of latch IC203,10,11,1 pin respectively with can wipe memory IC207, IC208,10 of IC209,9,8,7 pin link to each other, 2 of latch IC204,10,11,1 pin respectively with can wipe memory IC207, IC208,6 of IC209,5,4,3 pin link to each other, 2 of latch IC205,10,11,1 pin respectively with can wipe memory IC207, IC208,25 of IC209,24,21,23 pin link to each other, 15 pin of latch IC206 with can wipe memory IC207, IC208,2 pin of IC209 link to each other, can wipe 16 of memory IC207,17,18,19 pin respectively with 7 of code translator IC210,1,2,6 pin link to each other, can wipe 11 of memory IC207,12,13,15 pin respectively with 7 of code translator IC211,1,2,6 pin link to each other, can wipe 16 of memory IC208,17,18,19 pin respectively with 7 of code translator IC212,1,2,6 pin link to each other, 15 pin of IC208 link to each other with 5 pin of inverter ic 217,6 pin of IC217 link to each other with 7 pin of charactron S203,13 pin of IC208 link to each other with 3 pin of inverter ic 217,4 pin of IC217 link to each other with 7 pin of charactron S204,13 of code translator IC210,12,11,10,9,15,14 pin respectively with 10 of charactron S202,9,8,5,4,2,3,7 pin link to each other, 1 of charactron S203,6 pin, 1 of S202,6 pin, 1 of S201,6,7 pin are respectively by current-limiting resistance R239, R240, link to each other with positive 5V power supply behind the R241;
11,12,13,15 pin that can wipe memory IC209 link to each other with 1,3,5,7 pin of photoelectronic coupler IC213 by resistance R 215, R216, R217, R218 respectively, and 16,17,18,19 pin of IC209 link to each other with 1,3,5,7 pin of photoelectronic coupler IC214 by resistance R 219, R200, R211, R222 respectively.Photoelectronic coupler IC213,2 of IC214,4,6, ground connection after the 8 pin parallel connections, 10 of photoelectronic coupler IC214,12,14,16 pin are respectively by pull-up resistor R223, R225, R227, R229, R231, R233, R235, link to each other with positive 5V power supply behind the R237,15 of photoelectronic coupler IC213,13,11,9 pin respectively with 7 of D/A converter IC215,6,5,4 pin link to each other, 15 of photoelectronic coupler IC214,13,11,9 pin respectively with 16 of D/A converter IC215,15,14,13 pin link to each other, 2 pin of inverter ic 217 link to each other with 1 pin of photoelectronic coupler IC218 by resistance R 242, the 2 pin ground connection of photoelectronic coupler IC218,4 pin of photoelectronic coupler IC218 connect positive 5V power supply after by resistance R 244,1 of its 3 pin and D/A converter IC215,2 pin link to each other, 11 of IC215,12 pin respectively with 2 of operational amplifier IC216,3 pin link to each other, 1 pin of IC216A links to each other with 5 pin of operational amplifier IC216B by resistance R 249 backs, 3 pin of IC216B link to each other with potentiometer center swing arm by resistance R 248,7 pin of IC216B link to each other with the base stage of transistor Q2 by resistance R 251, the emitter of Q2 is by resistance R 253, R254, R255, behind the R256, an end is by 5 pin of resistance R 252 backs with IC216B
Link to each other, the other end is by crystal diode D202 and capacitor C 212 back ground connection.
4, integrated oxidization zirconium flue gas oxygen analyzer according to claim 1 is characterized in that detecting device body rear portion is provided with standard gas inlet, reference gas inlet.
5, integrated oxidization zirconium flue gas oxygen analyzer according to claim 1 is characterized in that housing seat at converter is connected a side with the detecting device body rain cover is arranged, and has the reference gas outlet on the detecting device body in the rain cover protective range.
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| CN 200420026977 CN2695969Y (en) | 2004-05-12 | 2004-05-12 | Integral zirconium oxide smoke oxygen analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200420026977 CN2695969Y (en) | 2004-05-12 | 2004-05-12 | Integral zirconium oxide smoke oxygen analyzer |
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| CN2695969Y true CN2695969Y (en) | 2005-04-27 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101221082B (en) * | 2007-01-09 | 2011-04-20 | 唐家银 | Novel vacuometer |
| CN102749356A (en) * | 2012-06-05 | 2012-10-24 | 瓮福（集团）有限责任公司 | Protective device used for PH meter sensor |
| CN101292155B (en) * | 2005-10-18 | 2013-02-06 | 罗伯特·博世有限公司 | Mixture potential sensor for measuring a gas concentration |
| CN105674570A (en) * | 2014-11-19 | 2016-06-15 | 天津佳成宝自动化科技有限公司 | Fuzzy proportion integration differentiation (PID) type energy-saving control system for bionic boiler |
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| CN113311050A (en) * | 2021-05-18 | 2021-08-27 | 中国科学院合肥物质科学研究院 | Medical quick zirconia oxygen sensor |
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- 2004-05-12 CN CN 200420026977 patent/CN2695969Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101292155B (en) * | 2005-10-18 | 2013-02-06 | 罗伯特·博世有限公司 | Mixture potential sensor for measuring a gas concentration |
| CN101221082B (en) * | 2007-01-09 | 2011-04-20 | 唐家银 | Novel vacuometer |
| CN102749356A (en) * | 2012-06-05 | 2012-10-24 | 瓮福（集团）有限责任公司 | Protective device used for PH meter sensor |
| CN105674570A (en) * | 2014-11-19 | 2016-06-15 | 天津佳成宝自动化科技有限公司 | Fuzzy proportion integration differentiation (PID) type energy-saving control system for bionic boiler |
| CN106903382A (en) * | 2017-03-03 | 2017-06-30 | 东华大学 | A kind of die cavity electric spark machining working solution component monitoring system |
| CN106903382B (en) * | 2017-03-03 | 2019-03-08 | 东华大学 | A kind of type chamber electric spark machining working solution component monitoring system |
| CN113311050A (en) * | 2021-05-18 | 2021-08-27 | 中国科学院合肥物质科学研究院 | Medical quick zirconia oxygen sensor |
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Granted publication date: 20050427 Termination date: 20110512 |