CN102445465A - Chemical gas phase risk detection system with pressure-resistant and corrosion-resistant sealing device - Google Patents
Chemical gas phase risk detection system with pressure-resistant and corrosion-resistant sealing device Download PDFInfo
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- CN102445465A CN102445465A CN2011102802126A CN201110280212A CN102445465A CN 102445465 A CN102445465 A CN 102445465A CN 2011102802126 A CN2011102802126 A CN 2011102802126A CN 201110280212 A CN201110280212 A CN 201110280212A CN 102445465 A CN102445465 A CN 102445465A
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Abstract
The invention discloses a chemical gas phase risk detection system with a pressure-resistant and corrosion-resistant sealing device, which comprises a pressure-resistant and corrosion-resistant sealing device and a chemical gas phase risk detection system, wherein the pressure-resistant and corrosion-resistant sealing device comprises an ignition plug main body (1), an insulating layer (2), heater strip fixing ends (3, 4), an ignition electrode ground terminal (5), an inert material sealing ring (6), an ignition electrode input end (7), heater strip fixing holes (8, 9) and a fastening screw (10); and a detection circuit in the detection system comprises modules, including a pressure sensor, a pressure detection circuit, a battery, a liquid crystal screen, a pulse signal output unit, a clock, a rectifying bridge and a heater. The technical scheme has the advantages of high adaptability, easiness for maintaining, capability of ensuring convenient, safe and reliable use of an oxidative liquid classifying and grading tester, great increase in the efficiency, guarantee of the safety and saving in labor force.
Description
Technical field
The invention belongs to the detection technique field, relate to the vapor detection technical field that Classification of Dangerous is differentiated, be specifically related to a kind of dangerous detection system of chemicals gas phase and application thereof that has withstand voltage corrosion-resistant packoff.
Background technology
In the world, current hazardous materials transportation standard---the United Nations's " Recommendations on the Transport of Dangerous Goods ", " international ocean shipping is endangered and advised ", " International Air Transport Association's danger rule " produce gas phase danger to dangerous material, and clear and definite classification is arranged, and are included in the oxidizing substance.In the relevant test specification,, do not stipulate the manufacturing process of instrument only relevant for the performance requirement that detects; In addition; External correlation technique barrier, this type of detecting instrument restriction causes domestic coherent detection instrument to China's outlet or not even to China's outlet; And then can't reach the detection of certain precision, thereby influence the products export transportation of enterprise and the increase of product high added value.The major technique bottleneck of such detecting instrument is, be exactly these type of dangerous material in testing process, can produce 7-20 atmospheric pressure, be attended by corrosive chemical vapors simultaneously, the chemical vapors of generation has uncertainty; Detection system may contact with the severe corrosive vapor phase in addition; These have all proposed harsh requirement to detecting instrument system withstand voltage, corrosion-resistant, are difficult in the manufacturing realizing, and realize that also there is certain technical difficulty in the high-precision requirement of such detecting instrument.At present, on market, such homemade checkout equipment does not appear.
Summary of the invention
For overcoming above-mentioned " bottleneck " of prior art; Repeatedly design and study through the technician; The present invention proposes a kind of dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff; It can be in chemical laboratory, realize to 65% nitric acid be representative 200 surplus in the gas phase of chemicals dangerous, the discriminating of classifying.And this equipment that has the dangerous detection system of chemicals gas phase of withstand voltage corrosion-resistant packoff has overcome defective and technical bottleneck in the existing design.
According to the first aspect of technical scheme of the present invention, a kind of dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff is provided, it comprises withstand voltage corrosion-resistant packoff and the dangerous detection system of chemicals gas phase.Wherein, withstand voltage corrosion-resistant packoff comprises igniter plug main body 1, insulation course 2, heating wire stiff end 3 and 4, spark electrode earth terminal 5, inert material sealing ring 6, spark electrode input end 7, heating wire fixed orifice 8 and 9, trip bolt 10; Wherein igniter plug main body 1 is the main body of this withstand voltage corrosion-resistant packoff; Insulation course 2 is to be embedded in the igniter plug main body 1, keeps electrode and 1 insulation of igniter plug main body; Heating wire stiff end 3 and 4 is fixed on the igniter plug main body 1 and with heater strip and links to each other, and plays the effect that heater strip is fixed on a piston main body 1; Spark electrode earth terminal 5 also is an end of spark electrode; Inert material sealing ring 6 is embedded on the igniter plug main body 1, and assurance gas can not revealed; Spark electrode input end 7 has formed pair of electrodes with spark electrode earth terminal 5; Heating wire fixed orifice 8 and 9, heating wire fixed orifice 10, trip bolt are used for heating wire is fixed, and guarantee that initial firing current passes through smoothly, accomplish the single test cycle.
Wherein, Insulation course 2 and inert metal sealing ring 6 tapered shapes in the withstand voltage corrosion-resistant packoff; In the process that inert metal sealing ring 6 and spark electrode input end 7 and heating wire stiff end 3 and 4 are tightened, make insulation course 2 and inert material sealing ring 6 fastening simultaneously, thereby formation suit tight contact along two relative directions distortion; Reach the purpose of sealing oxidizing gas, press above pressure in the 2200kPa thereby withstand voltage corrosion-resistant packoff can be tolerated.Because whole withstand voltage corrosion-resistant packoff has the sealing of O-ring seal, the protection of insulation course makes when electric current flows through heating wire and lights a fire, and can light a fire fast, and make oxidisability chemicals wherein, produces the pressure more than the 2.2MPa.
In addition; Have the dangerous detection system of chemicals gas phase of withstand voltage corrosion-resistant packoff, the testing circuit in the dangerous detection system of chemicals gas phase comprises with lower module: pressure transducer, pressure detection circuit, battery, liquid crystal display, pulse signal output unit, clock, rectifier bridge and well heater; Wherein pressure transducer changes into electric signal with the pressure variation that produces and is transferred to pressure detection circuit; Pressure detection circuit receives from carrying out processing and amplifying behind the signal of pressure transducer; Battery is used for when instrument is not worked guaranteeing that time data do not lose; Liquid crystal display shows experimental data in real time; The pulse signal output unit is used to promote power amplifier, to heating wire enough electric currents is provided; Clock is used to write down the time of experiment; Rectifier bridge be used for alternating current be converted into direct current not well heater the enough energy is provided; Well heater is used to light the thermal source of chemicals.
Wherein, testing circuit also comprises the supply module part; The structure of said supply module part is come through fuse (F1 for the 220V/50HZ alternating current; F2) connect two-way transformation coil; One tunnel transformation coil is sent into the input pin of circuit of three-terminal voltage-stabilizing integrated LM7805 through the 8V rectifier bridge; Have C4, two filtering of C5 to use electric capacity before the input pin, module LM7805 output pin connects capacitor C 12, the stable 5V voltage of C13 output, the 2 pin ground connection of module LM7805; Another road transformation coil divides two branch roads again through D.C mutual-inductor, and a branch road provides power supply through the voltage that rectifier bridge generates 10V, and another branch road is given heating installation power supply again through stabilivolt D7 voltage stabilizing after C8, C9 filtering.
Preferably, in testing circuit, use module I C1, it is dual power supply comparer LM324; The V+ pin meets power supply VCC; V-terminating diode D1 connects the A end of pressure transducer then, and output pin connects through the anode of resistance R 1 with diode D1 respectively, connects through the negative terminal of resistance R 2 with diode D1 again.C end ground connection behind protective resistance R8 of pressure transducer; The B end divides two-way; One the tunnel through electrochemical capacitor C17 ground connection, and another road directly connects positive input terminal 12 pin of operational amplifier LM324, and D brings out a minute two-way; One the tunnel through electrochemical capacitor C16 ground connection, and another road directly connects positive input terminal 3 pin of operational amplifier LM324.
More preferably, in testing circuit, use module I C2, it is the most frequently used operational amplifier LM324, its 1,2; 3 pin are one group 5,6, and 7 pin are one group, 8,9; 10 pin are one group, and 12,13,14 pin are one group, and two remaining pin are power supplys; 1,7,8,14th, respectively organize the output pin of amplifier, other be exactly input pin.LM324 is used for amplifying the feeble signal that obtains from pressure transducer in this circuit, directly gives control module then and handles.Slide-changing resistor device VR1, VR2, VR3 are used for regulating enlargement factor, to obtain rational signal intensity.The negative input end 2 of LM324 links to each other through rheostat VR1 with 13 pin, and 13 pin insert 14 pin through resistance R 10, and 14 pin come out to insert 10 pin through resistance R 14 one road; Another road is through R13 ground connection, and 2 pin connect 1 pin through R11, and 1 pin is through 12 fens two-way of resistance R; One the tunnel directly connects 9 pin, and another road is connected with 8 pin through rheostat VR2, and 9 pin also are connected with 8 pin through VR2; 8 pin come out to be connected with 5 pin through resistance R 17, and 5 pin are through resistance R 16 ground connection, and 6 pin one tunnel are through resistance R 18 ground connection; 7 pin are inserted through rheostat VR3 in another road, and 7 pin insert the RA0 pin of single-chip microcomputer, the direct ground connection of 11 pin.
In addition, in testing circuit, also use module controls module I C3, it is core devices PIC single-chip microcomputer 16F876A, delivers to the RA0 pin of IC3 after the signal that pressure transducer obtains amplifies through pressure detection circuit operational amplifier LM324.Single-chip microcomputer adopts the crystal oscillator of 12MHz, and button S4 can carry out hand-reset.Its supply pin Vss connects and inserts the RA3 pin behind the stabilivolt reference voltage is provided, and the Vdd pin meets sending and receiving optical diode D8 behind the protective resistance R22, is used for indicating the power supply of single-chip microcomputer and liquid crystal normally.1 pin ground connection of liquid crystal, 2 pin connect power supply, and 19 pin link to each other through rheostat VR4 with 20 pin, and 6 pin connect the RC5 pin of single-chip microcomputer; 7 pin connect the RA4 pin of single-chip microcomputer, and 8 pin connect the RC2 pin of single-chip microcomputer, and the D0 pin connects the RB0 pin of single-chip microcomputer, and the D1 pin connects the RB1 pin of single-chip microcomputer; The D2 pin connects the RB2 pin of single-chip microcomputer, and the D3 pin connects the RB3 pin of single-chip microcomputer, and the D4 pin connects the RB4 pin of single-chip microcomputer, and the D5 pin connects the RB5 pin of single-chip microcomputer; The D6 pin connects the RB6 pin of single-chip microcomputer, and the D7 pin connects the RB7 pin of single-chip microcomputer, and the VCC pin connects the Vdd pin of single-chip microcomputer.
In addition; In testing circuit, also use photoelectric isolation module IC4, the input end of photoelectric isolation module IC4 is connected back and single-chip microcomputer with resistance R 7 RC2 pin inserts, and 4 pin connect the negative terminal of well heater and diode D4; 3 pin connecting resistance R8 connect the G end of FET IRF640 then; The G end is through resistance R 9 ground connection, and S is ground connection extremely directly, and the D utmost point and S extremely directly diode D5 play the effect of protecting FET IRF640.The electric current that current transformer comes from well heater induction is given diode D7 and is carried out rectification and after C8, C9 filtering, give current measurement circuit again; It is the positive input terminal that the positive terminating resistor R21 of C9 inserts operational amplifier then; Positive input terminal is through resistance R 22 ground connection, and negative input end one tunnel is through resistance R 23 ground connection, and another road connects output terminal through rheostat VR5; Output terminal connects the RA1 pin of single-chip microcomputer, in single-chip microcomputer, compares computing then.
Further, in testing circuit, also use clock module IC6, clock module IC6 is PCF8563; It is the multifunction timepiece/calendar chip with extremely low power dissipation that a technical grade that PHILIPS company releases includes I2C EBI function, uses the 3V powered battery, and crystal oscillator is selected the oscillator of built-in 32.768KHz for use; The serial clock input connects the RC3 pin of single-chip microcomputer; Serial data I/O connects the RC4 pin of single-chip microcomputer, and 6 pin are connected with the 5V power supply through resistance R 19, and 5 pin are connected with the 5V power supply through resistance R 20.
In testing circuit, with Upper machine communication module IC5 be the MAX485 interface chip ,+5V voltage is connected with host computer behind 6 (A), 7 (B) pin connecting resistance R15 through inserting the power supply of 8 pin after the capacitor C 10, C11 filtering.The RO pin is connected with the RC7 pin of single-chip microcomputer, and the RE pin is connected with the RC1 pin of single-chip microcomputer, and the DE pin is connected with the RC0 pin of single-chip microcomputer, and the DI pin is connected with the RC6 pin of single-chip microcomputer, 5 pin ground connection; The positive terminating resistor R21 of battery connects the 5V power supply then, and negativing ending grounding connects the 5V power supply after capacitor C 15.
Second aspect according to technical scheme of the present invention; Provide a kind of chemicals gas phase that has a withstand voltage corrosion-resistant packoff dangerous detection system, it comprises with the lower part: igniter plug main body 301, housing screw 302, security insurance sheet 303, O-ring seal 304, pressure force signal pipe 305, O- ring seal 306 and 307, electrode fixedly plug 308, insulating sleeve 309, electrode A gib screw 310, bracing frame 311, electrode B gib screw 312, light original paper installation head 313, O-ring seal 314, base 315, pressure transducer mounting hole 316.The mechanical body of detection system partly is the igniter plug main body, and housing screw 302, security insurance sheet 303,304 3 elements of O-ring seal be after lighting chemical solvent and producing pressure, guarantees the parts that pressure security discharges, and guarantees the safety of detection system.Pressure force signal pipe 305 and O-ring seal 306 be with the pressure transmission in the pressure vessel to pressure transducer; O-ring seal 307 and electrode be plug 308 fixedly, does not reveal in the time of can guaranteeing the transmission of electric current and produce pressure.The effect of insulating sleeve 309 and electrode A gib screw 310 be guarantee transmitting electrode not with an other electric pole short circuit.And bracing frame 311 is to support igniter plug main body 301, and is convenient to accomplish the cleaning of waste residue after the single test.Installing electrodes on the electrode B gib screw 312.Light on the original paper installation head 313, heating element is installed.Be fixed on two electrode tops.O-ring seal 314 can guarantee that main body is connected with withstand voltage corrosion-resistant packoff closely, and air tight.Base 315 is mount pads of single unit system, guarantees the stable of system.Pressure transducer mounting hole 316 is used for the setting pressure sensor.
The technical scheme applicability that this invention proposes is strong, and easy care can guarantee convenience, the safe and reliable use of oxidizing liquid classification deciding grade and level tester, raises the efficiency, guarantees safety greatly, saves manpower.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is according to plug construction figure of the present invention;
Fig. 2 is the circuit diagram according to detection system of the present invention;
Fig. 3 is according to integral mechanical structure figure of the present invention;
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The inventor provides a kind of dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff, and it mainly comprises withstand voltage corrosion-resistant packoff and the dangerous detection system of chemicals gas phase.Wherein, withstand voltage corrosion-resistant packoff comprises igniter plug main body 1, insulation course 2, heating wire stiff end 3 and 4, spark electrode earth terminal 5, inert material sealing ring 6, spark electrode input end 7, heating wire fixed orifice 8 and 9, trip bolt 10; Wherein igniter plug main body 1 is the main body of this withstand voltage corrosion-resistant packoff; Insulation course 2 is to be embedded in the igniter plug main body 1, keeps electrode and 1 insulation of igniter plug main body; Heating wire stiff end 3 and 4 is fixed on the igniter plug main body 1 and with heater strip and links to each other, and plays the effect that heater strip is fixed on a piston main body 1; Spark electrode earth terminal 5 also is an end of spark electrode; Inert material sealing ring 6 is embedded on the igniter plug main body 1, and assurance gas can not revealed; Spark electrode input end 7 has formed pair of electrodes with spark electrode earth terminal 5; Heating wire fixed orifice 8 and 9, heating wire fixed orifice 10, trip bolt are used for heating wire is fixed, and guarantee that initial firing current passes through smoothly, accomplish the single test cycle.
Wherein, Insulation course 2 and inert metal sealing ring 6 tapered shapes in the withstand voltage corrosion-resistant packoff; In the process that inert metal sealing ring 6 and spark electrode input end 7 and heating wire stiff end 3 and 4 are tightened, make insulation course 2 and inert material sealing ring 6 fastening simultaneously, thereby formation suit tight contact along two relative directions distortion; Reach the purpose of sealing oxidizing gas, press above pressure in the 2200kPa thereby withstand voltage corrosion-resistant packoff can be tolerated.Because whole withstand voltage corrosion-resistant packoff has the sealing of O-ring seal, the protection of insulation course makes when electric current flows through heating wire and lights a fire, and can light a fire fast, and make oxidisability chemicals wherein, produces the pressure more than the 2.2MPa.
Additionally; Have the dangerous detection system of chemicals gas phase of withstand voltage corrosion-resistant packoff, the testing circuit in the dangerous detection system of chemicals gas phase comprises with lower module: pressure transducer, pressure detection circuit, battery, liquid crystal display, pulse signal output unit, clock, rectifier bridge and well heater; Wherein pressure transducer changes into electric signal with the pressure variation that produces and is transferred to pressure detection circuit; Pressure detection circuit receives from carrying out processing and amplifying behind the signal of pressure transducer; Battery is used for when instrument is not worked guaranteeing that time data do not lose; Liquid crystal display shows experimental data in real time; The pulse signal output unit is used to promote power amplifier, to heating wire enough electric currents is provided; Clock is used to write down the time of experiment; Rectifier bridge be used for alternating current be converted into direct current not well heater the enough energy is provided; Well heater is used to light the thermal source of chemicals.
Wherein, testing circuit also comprises the supply module part; The structure of said supply module part is come through fuse (F1 for the 220V/50HZ alternating current; F2) connect two-way transformation coil; One tunnel transformation coil is sent into the input pin of circuit of three-terminal voltage-stabilizing integrated LM7805 through the 8V rectifier bridge; Have C4, two filtering of C5 to use electric capacity before the input pin, module LM7805 output pin connects capacitor C 12, the stable 5V voltage of C13 output, the 2 pin ground connection of module LM7805; Another road transformation coil divides two branch roads again through D.C mutual-inductor, and a branch road provides power supply through the voltage that rectifier bridge generates 10V, and another branch road is given heating installation power supply again through stabilivolt D7 voltage stabilizing after C8, C9 filtering.
Module I C1 LM324 is the dual power supply comparer, and the V+ pin meets power supply VCC, and V-terminating diode D1 connects the A end of pressure transducer then, and output pin connects through the anode of resistance R 1 with diode D1 respectively, connects through the negative terminal of resistance R 2 with diode D1 again.C end ground connection behind protective resistance R8 of pressure transducer; The B end divides two-way; One the tunnel through electrochemical capacitor C17 ground connection, and another road directly connects positive input terminal 12 pin of operational amplifier LM324, and D brings out a minute two-way; One the tunnel through electrochemical capacitor C16 ground connection, and another road directly connects positive input terminal 3 pin of operational amplifier LM324.
Module I C2 is the most frequently used operational amplifier LM324, and its 1,2,3 pin are one group 5,6, and 7 pin are one group; 8,9,10 pin are one group, and 12,13,14 pin are one group; Two remaining pin are power supplys, 1,7,8,14th, respectively organize the output pin of amplifier, other be exactly input pin.LM324 is used for amplifying the feeble signal that obtains from pressure transducer in this circuit, directly gives control module then and handles.Slide-changing resistor device VR1, VR2, VR3 are used for regulating enlargement factor, to obtain rational signal intensity.The negative input end 2 of LM324 links to each other through rheostat VR1 with 13 pin, and 13 pin insert 14 pin through resistance R 10, and 14 pin come out to insert 10 pin through resistance R 14 one road; Another road is through R13 ground connection, and 2 pin connect 1 pin through R11, and 1 pin is through 12 fens two-way of resistance R; One the tunnel directly connects 9 pin, and another road is connected with 8 pin through rheostat VR2, and 9 pin also are connected with 8 pin through VR2; 8 pin come out to be connected with 5 pin through resistance R 17, and 5 pin are through resistance R 16 ground connection, and 6 pin one tunnel are through resistance R 18 ground connection; 7 pin are inserted through rheostat VR3 in another road, and 7 pin insert the RA0 pin of single-chip microcomputer, the direct ground connection of 11 pin.
Control module IC3 is core devices PIC single-chip microcomputer 16F876A, delivers to the RA0 pin of IC3 after the signal that pressure transducer obtains amplifies through pressure detection circuit operational amplifier LM324.Single-chip microcomputer adopts the crystal oscillator of 12MHz, and button S4 can carry out hand-reset.Its supply pin Vss connects and inserts the RA3 pin behind the stabilivolt reference voltage is provided, and the Vdd pin meets sending and receiving optical diode D8 behind the protective resistance R22, is used for indicating the power supply of single-chip microcomputer and liquid crystal normally.1 pin ground connection of liquid crystal, 2 pin connect power supply, and 19 pin link to each other through rheostat VR4 with 20 pin, and 6 pin connect the RC5 pin of single-chip microcomputer; 7 pin connect the RA4 pin of single-chip microcomputer, and 8 pin connect the RC2 pin of single-chip microcomputer, and the D0 pin connects the RB0 pin of single-chip microcomputer, and the D1 pin connects the RB1 pin of single-chip microcomputer; The D2 pin connects the RB2 pin of single-chip microcomputer, and the D3 pin connects the RB3 pin of single-chip microcomputer, and the D4 pin connects the RB4 pin of single-chip microcomputer, and the D5 pin connects the RB5 pin of single-chip microcomputer; The D6 pin connects the RB6 pin of single-chip microcomputer, and the D7 pin connects the RB7 pin of single-chip microcomputer, and the VCC pin connects the Vdd pin of single-chip microcomputer.
The input end of photoelectric isolation module IC4 is connected back and single-chip microcomputer with resistance R 7 RC2 pin inserts; 4 pin connect the negative terminal of well heater and diode D4; 3 pin connecting resistance R8 connect the G end of FET IRF640 then; The G end is through resistance R 9 ground connection, and S is ground connection extremely directly, and the D utmost point and S extremely directly diode D5 play the effect of protecting FET IRF640.The electric current that current transformer comes from well heater induction is given diode D7 and is carried out rectification and after C8, C9 filtering, give current measurement circuit again; It is the positive input terminal that the positive terminating resistor R21 of C9 inserts operational amplifier then; Positive input terminal is through resistance R 22 ground connection, and negative input end one tunnel is through resistance R 23 ground connection, and another road connects output terminal through rheostat VR5; Output terminal connects the RA1 pin of single-chip microcomputer, in single-chip microcomputer, compares computing then.
Clock module IC6 is PCF8563; It is the multifunction timepiece/calendar chip with extremely low power dissipation that a technical grade that PHILIPS company releases includes I2C EBI function, uses the 3V powered battery, and crystal oscillator is selected the oscillator of built-in 32.768KHz for use; The serial clock input connects the RC3 pin of single-chip microcomputer; Serial data I/O connects the RC4 pin of single-chip microcomputer, and 6 pin are connected with the 5V power supply through resistance R 19, and 5 pin are connected with the 5V power supply through resistance R 20.
With Upper machine communication module IC5 be the MAX485 interface chip ,+5V voltage is connected with host computer behind 6 (A), 7 (B) pin connecting resistance R15 through inserting the power supply of 8 pin after the capacitor C 10, C11 filtering.The RO pin is connected with the RC7 pin of single-chip microcomputer, and the RE pin is connected with the RC1 pin of single-chip microcomputer, and the DE pin is connected with the RC0 pin of single-chip microcomputer, and the DI pin is connected with the RC6 pin of single-chip microcomputer, 5 pin ground connection.The positive terminating resistor R21 of battery connects the 5V power supply then, and negativing ending grounding connects the 5V power supply after capacitor C 15.
Additionally, as shown in Figure 3 according to contour structure of the present invention, for the purpose of simple, concrete testing circuit result is not shown therein.Whole detection system in the dangerous detection system of the chemicals gas phase that has withstand voltage corrosion-resistant packoff shown in Fig. 3 comprises with the lower part: igniter plug main body 301; Housing screw 302; Security insurance sheet 303; O-ring seal 304; Pressure force signal pipe 305; O- ring seal 306 and 307; Electrode is plug 308 fixedly; Insulating sleeve 309; Electrode A gib screw 310; Bracing frame 311; Electrode B gib screw 312; Light original paper installation head 313; O-ring seal 314; Base 315; Pressure transducer mounting hole 316.The mechanical body of detection system partly is the igniter plug main body, and housing screw 302, security insurance sheet 303,304 3 elements of O-ring seal be after lighting chemical solvent and producing pressure, guarantees the parts of the safe release of pressure, guarantees the safety of detection system.Pressure force signal pipe 305 and O-ring seal 306 be with the pressure transmission in the pressure vessel to pressure transducer; O-ring seal 307 and electrode be plug 308 fixedly, does not reveal in the time of can guaranteeing the transmission of electric current and produce pressure.The effect of insulating sleeve 309 and electrode A gib screw 310 be guarantee transmitting electrode not with an other electric pole short circuit.And bracing frame 311 is to support igniter plug main body 301, and is convenient to accomplish the cleaning of waste residue after the single test.Installing electrodes on the electrode B gib screw 312.Light on the original paper installation head 313, heating element is installed.Be fixed on two electrode tops.O-ring seal 314 can guarantee that main body is connected with withstand voltage corrosion-resistant packoff closely, and air tight.Base 315 is mount pads of single unit system, guarantees the stable of system.Pressure transducer mounting hole 316 is used for the setting pressure sensor.
In the dangerous detection system of the chemicals gas phase that has a withstand voltage corrosion-resistant packoff of the present invention; The igniter plug that this patent designer makes is applicable to the classification deciding grade and level of measuring the fluent meterial oxidisability, has guaranteed that igniter plug has the igniter plug excellent sealing property under high pressure of chemical resistance, oxidisability in contact.When chemicals to be measured contacts with a kind of combustible, and when mixing fully, the combustion rate that the igniter plug that this patent designer makes is suitable for increasing to this material or the potentiality of intensity perhaps form the potentiality of spontaneous ignition potpourri.In addition; Oxidizing liquid belongs to the 5th type of dangerous substance of regulation in the United Nations's " Recommendations on the Transport of Dangerous Goods ", " international ocean shipping danger rule ", " the International Air Transport Association's danger rule ", also is one type of important in current China chemical industry and hazardous materials transportation chemicals.In the process of test, can produce high pressure and chemical corrosivity by chemicals to be measured, the key point of detecting instrument of the present invention is exactly the sealing and the chemical resistance of igniter plug.This detecting instrument can satisfy the needs of work for inspection, and is significant to the check of dangerous material, has high social and economic benefit; This detecting instrument belongs to the detecting instrument of the blank of filling up domestic dangerous material inspection technology field.
In addition, in the dangerous detection system of the chemicals gas phase that has a withstand voltage corrosion-resistant packoff of the present invention, in once fastening process, the heating wire that can also make three lobe shapes is the termination fixedly, holds tightly with heating wire, well contacts.The igniter plug that is designed among the present invention can fully satisfy the requirement of oxidizing liquid classification deciding grade and level tester.Further; The sealing igniter plug that contacts with the oxidisability chemicals, corrosion that not only can the oxidative resistance chemicals, and can reach once and tighten; The sealing effectiveness of two linkage sections, thus satisfy the requirement of the 2200kPa maximum internal pressure of oxidizing liquid classification deciding grade and level tester.
The above; Be merely the preferable embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any technician who is familiar with the present technique field is in the technical scope that the embodiment of the invention discloses, and the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. dangerous detection system of the chemicals gas phase that has a withstand voltage corrosion-resistant packoff, it comprises withstand voltage corrosion-resistant packoff and chemicals gas phase danger detection system; Wherein, Withstand voltage corrosion-resistant packoff comprises igniter plug main body (1), insulation course (2), heating wire stiff end (3; 4), spark electrode earth terminal (5), inert material sealing ring (6), spark electrode input end (7), heating wire fixed orifice (8,9) and trip bolt (10);
Wherein, igniter plug main body (1) is the main body of said withstand voltage corrosion-resistant packoff; Insulation course (2) is to be embedded in the igniter plug main body (1), keeps the insulation of electrode and igniter plug main body (1); The igniter plug main body (1) that is fixed on heating wire stiff end (3,4) goes up and links to each other with heater strip, plays the effect that heater strip is fixed on a piston main body (1); Spark electrode earth terminal (5) is an end of spark electrode; Inert material sealing ring (6) is embedded on the igniter plug main body (1), and assurance gas can not revealed; Spark electrode input end (7) and spark electrode earth terminal (5) have formed pair of electrodes; Heating wire fixed orifice (8,9) and trip bolt (10) are used for heating wire is fixed, and guarantee that initial firing current passes through smoothly, accomplish the single test cycle.
2. the dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff according to claim 1; Insulation course (2) in the wherein withstand voltage corrosion-resistant packoff and all tapered shape of inert metal sealing ring (6); The inert metal sealing ring (6) of cone-shaped and spark electrode input end (7) with heating wire stiff end (3; In the process of 4) tightening, make the inert material sealing ring (6) of insulation course (2) and cone-shaped of cone-shaped fastening simultaneously, suit tight contact thereby form along two relative directions distortion; Reach the purpose of sealing oxidizing gas, press above pressure in the 2200kPa thereby withstand voltage corrosion-resistant packoff can be tolerated.
3. the dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff according to claim 1, the testing circuit in the dangerous detection system of chemicals gas phase comprises with lower module: pressure transducer, pressure detection circuit, battery, liquid crystal display, pulse signal output unit, clock, rectifier bridge and well heater; Wherein pressure transducer changes into electric signal with the pressure variation that produces and is transferred to pressure detection circuit; Pressure detection circuit receives from carrying out processing and amplifying behind the signal of pressure transducer; Battery is used for when instrument is not worked guaranteeing that time data do not lose; Liquid crystal display shows experimental data in real time; The pulse signal output unit is used to promote power amplifier, to heating wire enough electric currents is provided; Clock is used to write down the time of experiment; Rectifier bridge be used for alternating current be converted into direct current not well heater the enough energy is provided; Well heater is used to light the thermal source of chemicals.
4. the dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff according to claim 3, wherein testing circuit also comprises the supply module part; The structure of said supply module part is come through fuse (F1 for the 220V/50HZ alternating current; F2) connect two-way transformation coil; One tunnel transformation coil is sent into the input pin of circuit of three-terminal voltage-stabilizing integrated LM7805 through the 8V rectifier bridge; Have C4, two filtering of C5 to use electric capacity before the input pin, module LM7805 output pin connects capacitor C 12, the stable 5V voltage of C13 output, the 2 pin ground connection of module LM7805; Another road transformation coil divides two branch roads again through D.C mutual-inductor, and a branch road provides power supply through the voltage that rectifier bridge generates 10V, and another branch road is given heating installation power supply again through stabilivolt D7 voltage stabilizing after C8, C9 filtering.
5. the dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff according to claim 3 is wherein used module I C1 in testing circuit; Module I C1 is dual power supply comparer LM324; The V+ pin of dual power supply comparer LM324 meets power supply VCC; The V-terminating diode D1 of dual power supply comparer LM324 connects the A end of pressure transducer then; Dual power supply comparer LM324 output pin connects through the anode of resistance R 1 with diode D1 respectively, connects through the negative terminal of resistance R 2 with diode D1 again; C end ground connection behind protective resistance R8 of pressure transducer, the B end divides two-way, and one the tunnel through electrochemical capacitor C17 ground connection, and another road directly connects positive input terminal 12 pin of operational amplifier LM324; D brings out the bifurcation road, and a branch road is through electrochemical capacitor C16 ground connection, and another branch road directly connects positive input terminal 3 pin of operational amplifier LM324.
6. the dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff according to claim 3 is wherein used module I C2 in testing circuit; Module I C2 is the most frequently used operational amplifier LM324, and 1,2,3 pin of operational amplifier LM324 are one group, 5 of operational amplifier LM324; 6,7 pin are one group, and 8,9,10 pin of operational amplifier LM324 are one group; 12,13,14 pin of operational amplifier LM324 are one group, and two remaining pin are power supplys, 1 of operational amplifier LM324; 7,8,14 pin are output pins of respectively organizing amplifier, other among the operational amplifier LM324 be exactly input pin; Operational amplifier LM324 is used for amplifying the feeble signal that obtains from pressure transducer, directly gives control module then and handles; Slide-changing resistor device VR1, VR2, VR3 are used for regulating enlargement factor, to obtain rational signal intensity; The negative input end 2 of operational amplifier LM324 links to each other through rheostat VR1 with 13 pin, and 13 pin insert 14 pin through resistance R 10, and 14 pin come out to insert 10 pin through resistance R 14 one road; Another road is through R13 ground connection, and 2 pin connect 1 pin through R11, and 1 pin is through resistance R 12 bifurcation roads; One branch road directly connects 9 pin, and another branch road is connected with 8 pin through rheostat VR2, and 9 pin also are connected with 8 pin through VR2; 8 pin come out to be connected with 5 pin through resistance R 17, and 5 pin are through resistance R 16 ground connection, and 6 pin one tunnel are through resistance R 18 ground connection; 7 pin are inserted through rheostat VR3 in another road, and 7 pin insert the RA0 pin of single-chip microcomputer, the direct ground connection of 11 pin.
7. the dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff according to claim 3 is wherein also used module controls module I C3 in testing circuit; Module controls module I C3 is PIC single-chip microcomputer 16F876A, delivers to the RA0 pin of IC3 after the signal that pressure transducer obtains amplifies through pressure detection circuit operational amplifier LM324; Single-chip microcomputer adopts the crystal oscillator of 12MHz, and button S4 can carry out hand-reset; Its supply pin Vss connects and inserts the RA3 pin behind the stabilivolt reference voltage is provided, and the Vdd pin meets sending and receiving optical diode D8 behind the protective resistance R22, is used for indicating the power supply of single-chip microcomputer and liquid crystal normally; 1 pin ground connection of liquid crystal, 2 pin connect power supply, and 19 pin link to each other through rheostat VR4 with 20 pin, and 6 pin connect the RC5 pin of single-chip microcomputer; 7 pin connect the RA4 pin of single-chip microcomputer, and 8 pin connect the RC2 pin of single-chip microcomputer, and the D0 pin connects the RB0 pin of single-chip microcomputer, and the D1 pin connects the RB1 pin of single-chip microcomputer; The D2 pin connects the RB2 pin of single-chip microcomputer, and the D3 pin connects the RB3 pin of single-chip microcomputer, and the D4 pin connects the RB4 pin of single-chip microcomputer, and the D5 pin connects the RB5 pin of single-chip microcomputer; The D6 pin connects the RB6 pin of single-chip microcomputer, and the D7 pin connects the RB7 pin of single-chip microcomputer, and the VCC pin connects the Vdd pin of single-chip microcomputer.
8. the dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff according to claim 3; Wherein in testing circuit, also use photoelectric isolation module IC4; The input end of photoelectric isolation module IC4 is connected back and single-chip microcomputer with resistance R 7 RC2 pin inserts; 4 pin connect the negative terminal of well heater and diode D4, and 3 pin connecting resistance R8 connect the G end of FET IRF640 then, and G holds through resistance R 9 ground connection; S is ground connection extremely directly, and the D utmost point and S extremely directly diode D5 play the effect of protecting FET IRF640; The electric current that current transformer comes from well heater induction is given diode D7 and is carried out rectification and after C8, C9 filtering, give current measurement circuit again; It is the positive input terminal that the positive terminating resistor R21 of C9 inserts operational amplifier then; Positive input terminal is through resistance R 22 ground connection, and negative input end one tunnel is through resistance R 23 ground connection, and another road connects output terminal through rheostat VR5; Output terminal connects the RA1 pin of single-chip microcomputer, in single-chip microcomputer, compares computing then.
9. the dangerous detection system of chemicals gas phase that has withstand voltage corrosion-resistant packoff according to claim 3; Wherein in testing circuit, also use clock module IC6, clock module IC6 is PCF8563, and it is the multifunction timepiece/calendar chip with extremely low power dissipation that a technical grade that PHILIPS company releases includes I2C EBI function; Use the 3V powered battery; Crystal oscillator is selected the oscillator of built-in 32.768KHz for use, and the serial clock input connects the RC3 pin of single-chip microcomputer, and serial data I/O connects the RC4 pin of single-chip microcomputer; 6 pin are connected with the 5V power supply through resistance R 19, and 5 pin are connected with the 5V power supply through resistance R 20;
In testing circuit, with Upper machine communication module IC5 be the MAX485 interface chip ,+5V voltage is connected with host computer behind 6 (A), 7 (B) pin connecting resistance R15 through inserting the power supply of 8 pin after the capacitor C 10, C11 filtering; The RO pin is connected with the RC7 pin of single-chip microcomputer, and the RE pin is connected with the RC1 pin of single-chip microcomputer, and the DE pin is connected with the RC0 pin of single-chip microcomputer, and the DI pin is connected with the RC6 pin of single-chip microcomputer, 5 pin ground connection; The positive terminating resistor R21 of battery connects the 5V power supply then, and negativing ending grounding connects the 5V power supply after capacitor C 15.
10. dangerous detection system of the chemicals gas phase that has a withstand voltage corrosion-resistant packoff, it comprise igniter plug main body (301), housing screw (302), security insurance sheet (303), O-ring seal (304), pressure force signal pipe (305), O-ring seal (306) and (307), electrode fixedly plug (308), insulating sleeve (309), electrode A gib screw (310), bracing frame (311), electrode B gib screw (312), light original paper installation head (313), O-ring seal (314), base (315), pressure transducer mounting hole (316); The mechanical body of detection system partly is the igniter plug main body, and three elements such as housing screw (302), security insurance sheet (303), O-ring seal (304) are after lighting chemical solvent generation pressure, guarantee the parts that pressure security discharges; Pressure force signal pipe (305) and O-ring seal (306) be with the pressure transmission in the pressure vessel to pressure transducer; O-ring seal (307) and electrode be plug (308) fixedly, does not reveal in the time of can guaranteeing the transmission of electric current and produce pressure; The effect of insulating sleeve (309) and electrode A gib screw (310) be guarantee transmitting electrode not with an other electric pole short circuit; And bracing frame (311) is to support igniter plug main body (301), and is convenient to accomplish the cleaning of waste residue after the single test; Electrode B gib screw (312) is gone up installing electrodes; Light on the original paper installation head (313), heating element is installed; Be fixed on two electrode tops; O-ring seal (314) can guarantee that main body is connected with withstand voltage corrosion-resistant packoff closely, and air tight; Base (315) is the mount pad of single unit system, guarantees the stable of system; Pressure transducer mounting hole (316) is used for the setting pressure sensor.
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| CN201110280212A CN102445465B (en) | 2011-09-21 | 2011-09-21 | Chemical gas phase risk detection system with pressure-resistant and corrosion-resistant sealing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108955440A (en) * | 2018-08-28 | 2018-12-07 | 西安近代化学研究所 | A kind of anti-knock container conducting device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103399036A (en) * | 2013-08-22 | 2013-11-20 | 天津出入境检验检疫局工业产品安全技术中心 | Ignition device of solid dangerous goods pressure test equipment |
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| US3768313A (en) * | 1970-12-02 | 1973-10-30 | Industrilaboratoriet Ab | Method of determining the risk of explosion of a preferably gaseous medium and apparatus for carrying out this method |
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