CN109848134A - Intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner - Google Patents
Intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner Download PDFInfo
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Abstract
To solve the deficiencies in the prior art, this patent provides intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner, it include: 23 three-way electromagnetic valve V1V2, filter F ILTER, heater HEATER, dehumidifier DE, diaphragm aspiration pump PUMP, nitrogen gas tank NITROGEN CANISTER, DC decompression converter U1, temperature sensor PT100, temperature A/D U2, main control chip U3, humidity sensor U4, solid-state relay U5U6U7U8U9, present apparatus feature: circuit parameter is according to substantial safety-design, do not have to disassemble former instrument when cleaning hydrogen gas sensor, it is cleaned using the nitrogen after heating and dehumidification, with very high efficiency and security performance.
Description
Technical field
Device relates generally to the maintenance of generator density of hydrogen instrument, and in particular to intrinsic safety type generator thermal conduction density of hydrogen
Instrument sensor dedicated cleaner.
Background technique
The essential safety technique functions explosion of coal mines accident serious derived from an exception, on October 14th, 1913, Britain
Southern Wales (South Wales) coal mine burst explosion, causes huge life and property loss, has 439 miners to lose one's life,
The reason of accident is that the electric spark unintended ignition methane gas that mining area electric bell equipment generates causes.
1945, Britain took the lead in having promulgated that first official standard in relation to Intrinsic Safety Explosive-proof Technology in the world, the standard are first
It is secondary to define in relation to " essential safety " some terms and define operation, test and the rule for authenticating this full equipment.1977, I
State promulgates the standard of the Intrinsic Safety Explosive-proof Technology of oneself, " the safety fire formulated by First Machinery Industry Department at that time, Ministry of Coal Industry, petrochemical industry portion joint
Flower pattern electric apparatus for explosive atmospheres manufacturing inspection temporary provisions ".After 6 years, China has formally promulgated code name GB3836.4-1983 intrinsic safety
Explosion-proof criteria-" explosive atmosphere electric apparatus for explosive atmospheres intrinsic safety type circuit and electrical equipment " i " ".National quality technical supervision
Office ratified in 2000, has promulgated new standard GB3836.4-2000.
All kinds of explosion risk gases all have its minimum energy firing point (wherein, 19 μ J of hydrogen, 60 μ J of ethylene, propylene
200 μ J, 280 μ J of methane), as long as guaranteeing regardless of the fuel factor that instrument can be generated when normal work or failure is lower than most
When low spot burning point, dangerous gas would not be caused to explode.So the design of this cleaning device, is primarily exactly to limit this
Body energy is limited to the voltage of circuit, electric current in reliable section, to ensure that instrument either works normally or occurs
Generated electric spark or fuel factor do not cause its dangerous body to generate explosion when short circuit or other failures.Hydrogen environment is come
It says, it is necessary to the power limited within 1.3W of circuit.
Electric apparatus for explosive atmospheres is divided into essential safe type, flame-proof type, increased safety, positive pressure type, oil immersed, fills sand mold, pouring type
Deng.Wherein intrinsicallysafe electrical apparatus ensure that explosion-proof requirement from the electric parameter of circuit, eliminate flameproof enclosure, tool
There are most light safe coefficient highest, volume minimum, weight, carrying and maintenance most convenient and the most cheap five big advantage of cost.Therefore, it uses
In the electrical system and electrical equipment of dangerous place with a potential explosion, it is all can with or be hopeful to be designed to essential safe type, always
It is designed to essential safe type as far as possible, and is not designed to flame-proof type or other types.
In the operational process of unit, sealing of the hydrogen at shaft in generator machine is controlled by generator Seal Oil
Come what is realized, sealing oil pressure is consistently higher than generator hydrogen and presses a specified numerical value the constant Seal Oil of the pressure that system provides.
Due to the contact with Seal Oil, hydrogen may contain mist of oil, air, vapor and other pollutants in machine.These in hydrogen
The presence of ingredient can not only cause some components of generator and insulation etc. to corrode and damage, the purity of hydrogen
It will be greatly reduced, the draft loss of generator also can the linear increase with the reduction of hydrogen purity.Therefore the drop of hydrogen purity
The low generating efficiency that will seriously affect generator.
When the hydrogen purity decline in machine is too fast, portion of air may be contained in hydrogen, it is mixed when hydrogen and air
Gas is closed when reaching certain proportion, the mixed gases of explosive are just produced in machine, this safe operation for unit
It is extremely dangerous.Nuclear leakage major accident has occurred in Fukushima in 2011, and the failure of cooling system causes hydrogen largely to leak, peace
Full shell generation hydrogen is quick-fried, ultimately causes major accident.Therefore accurate generator density of hydrogen detection is for the safe and efficient of unit
Operation is very important.
The detection of generator density of hydrogen is most of using heat-conducted, and the sensor of heat-conducted density of hydrogen instrument is anti-mounted in one
In quick-fried cover, the thermistor of high reliability is housed inside sensing element, these corresponding thermistors constitute bridge circuit
Arm is measured, it is thermally conductive to biography from respective thermistor that sample gas and calibrating gas can be measured using the out-of-balance current of bridge circuit
The relative ability on sensing unit surface, finally obtains density of hydrogen.Density of hydrogen instrument sensor adheres to mist of oil, the sky that upper hydrogen carries
After gas and water steam and other pollutants, measurement misalignment will lead to, existing method is that density of hydrogen instrument is carried out to manual decomposition,
Long-time purging is carried out to density of hydrogen instrument sensor with nitrogen, after density of hydrogen instrument sensor is clean, refills machine test.
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The Chen Xingwen of Tianjin tydgas gas equipment Co., Ltd.；Zhang Jianting；Yang Ping；Cao Li application Chinese invention patent
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The Yuan Guangzhen of magnificent ocean communication Science and Technology Co., Ltd.；Li Jin；Du Haiyang；The Chinese utility model of Zhao this peak application
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Intrinsic safety type communication energy-saving tunnel lamp and control method ", number of patent application 201711298893.2, application publication number
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The Liu Niansheng of Xuzhou Ke Rui mining industry Science and Technology Ltd.；Guo Junfeng；Zhou little Tao application Chinese utility model patent
" a kind of mining intrinsic-safety-type optical transceiver ", number of patent application 201721323651.X, Authorization Notice No. CN207504872U.
The Cao Hanjun of the explosion-proof scientific and technological Shanghai Co., Ltd of electric light；Gong Jinting；Wang Peng application Chinese utility model patent " mine
With intrinsic safety type infrared temperature sensor ", number of patent application 201721222316.0, Authorization Notice No. CN207395899U.
The Sun Yanjing of China Mining University；Wang Liang；Lu Nannan；Ma Zhanguo；Zhang Xiaoguang；Hua Gang；Li Song；Gong Siyuan；
Li Jiyuan application Chinese utility model patent " a kind of deep tunnel temperature monitoring intrinsic safety type wireless sensing node ", patent
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The Li Maolong of the chin or cheek Science and Technology Ltd. of Shandong thousand；Zhang Junsheng；Hao Shengfeng；The Chinese utility model of Du Zhongnian application is special
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The Zhao Tongyu of luminous power Science and Technology Co., Ltd.；Xu Chaohui；Wang Shuan；Wang Juan；Zhou Huifeng application is Chinese practical new
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The overseas Chinese of Shenzhen Wall gram automation control Co., Ltd；Wei Zhenwen；The Chinese utility model of Deng Lijun application
Patent " a kind of heat-conducted Flow speed measurer ", number of patent application 201720495209.9, Authorization Notice No. CN206725024U.
The Li Yonghua of Hefei Xizi, a famous beauty in the late Spring and Autumn Period gulf Electronic Science and Technology Co., Ltd.；Zhang Xingchen；Cao Yu application Chinese utility model patent
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The Li Chuan of Kunming University of Science and Technology；Si Xingdeng；Chen Yan；Li Yingna；Xue Junhua；Xue Zhenli；The Chinese reality of Wang Zhen application
With new patent " it is a kind of detection flue gas in CO2 content thermal-conductivity type gas analyser ", number of patent application 201220457604.5,
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The Sun Chao of Jianghan University；Fourth is for army building；Yellow distance of travel of roc；Lan Hui；Poplar is floatd；Zhang Mingyang application Chinese invention patent is " a kind of
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The Xiao Yike of metering university, China；Shen Changyu；Gong Jiaqi application Chinese invention patent is " based on interference inclination optical fiber
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The Wang Li of Beijing University of Technology；It is intercalation vigorously vigorously applied Chinese invention patent " a kind of tandem hydrogen and oxygen concentration and
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The Zhao Chunliu of metering university, China；Li Yina；Xu blames；A kind of Yu Dongyou application Chinese utility model patent " base
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In terms of United States Patent (USP):
The Surinya of Aegex Technologies, LLC (Atlanta, GA);Endre (Pecs, HU) has applied for beauty
State's patent " Intrinsically safe mobile device with reduction in sparking risk and
Surface heating " (patent No. 10,149,389).
The Marks of ABB SCHWEIZ AG (Baden, CH);Frank (Langenfeld, DE) has applied for that the U.S. is special
Benefit " Method and device for intrinsically safe redundant current supply of field
Devices " (patent No. 9,893,605).
Pool;Leonard (San Diego, CA) has applied for United States Patent (USP) " Intrinsically safe video
Inspection system " (patent No. 9,866,803).
The Kemp of FISHER CONTROLS INTERNATIONAL LLC (Marshalltown, IA); Matthew
J. (Marshalltown, IA), Nicholas; Davin S. (Marshalltown, IA), Seberger;
Stephen G. (Marshalltown, IA) has applied for United States Patent (USP) " Intrinsically safe voltage
Limiting shunt regulator circuit " (patent No. 9,768,694).
The Korn of Endress+Hauser Conducta Gmbh+Co. KG (Gerlingen, DE); Michael
(Marktoberdorf, DE), Haase; Bjorn (Stuttgart, DE), Robl; Stefan (Hunxe, DE),
Benkert; Tilman (Stuttgart, DE), Jahl;Gunter (Gerlingen, DE) has applied for United States Patent (USP)
" Intrinsically safe wireless dongle for a field device " (patent No. 9,543,712).
The Nemer of Rosemount Analytical Inc. (Solon, OH); Joseph C. (Mayfield
Heights, OH), Stojkov;Mark D. (Parma, OH) has applied for United States Patent (USP) " In situ heated
Oxygen probe with intrinsically safe output " (patent No. 9,518,968).
The Yeoh of MOTOROLA SOLUTIONS, INC. (Schaumburg, IL); Chen Kok (Bukit
Mertajam, MY), Bollmann; Friedrich Josef (Brandenburg, DE), @ Titus Lee; Geng
Xiang Lee (Pulau Pinang, MY), See;Joo Yih (Kedah, MY) has applied for United States Patent (USP)
" Intrinsically safe audio power current circuit and device using same " (patent No.
9,450,636).
The Tan of MOTOROLA SOLUTIONS, INC. (Schaumburg, IL); Cheah Heng (Bayan
Lepas, MY), Bollmann; Friedrich J (Birkenwerder, DE), Saw; Teik Seng (Sungai
Petani, MY), Svendsen; Peter William Hilding (Virum, DK), Teh; Kheng Shiang
(Bayan Lepas, MY) has applied for United States Patent (USP) " Intrinsically safe audio circuit for a
Portable two-way radio " (patent No. 9,369,800).
The Hunter of Rosemount Inc. (Chanhassen, MN); Kirk Allan (Shakopee, MN),
Lucht; Jordan Dennis (Maple Grove, MN), Dreier; Jared James (Chaska, MN),
Rovner;Bruce David (Minneapolis, MN) has applied for United States Patent (USP) " Industrial process
variable transmitter with isolated power scavenging intrinsically safe pulse
Output circuitry " (patent No. 9,228,869).
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO.'s, LTD. (Osaka, JP)
Fujii; Satoru (Osaka, JP), Homma; Kazunari (Kyoto, JP), Wei; Zhiqiang (Osaka,
JP United States Patent (USP) " Gas sensor including detection cells, and method for) has been applied for
Determining hydrogen concentration " (patent No. 10,156,536).
The Bierl of Continental Automotive GmbH (Hannover, DE); Rudolf
(Regensburg, DE), Grass; Philippe (Regensburg, DE), Heinrich; Stephan
(Pfeffenhausen, DE), Knittel; Thorsten (Regensburg, DE), Wildgen; Andreas
(Nittendorf, DE) has applied for United States Patent (USP) " Hydrogen sensor and a detection method for
Hydrogen concentration " (patent No. 9,027,386).
The Ishii of Global Nuclear Fuel-Japan Co., Ltd. (Yokosuka-Shi, JP);
Yoshiaki (Yokohama, JP), Miyazaki; Akihiro (Futaba-Gun, JP), Nakatsuka;
Masafumi (Mito, JP), Ishimoto;Shinji (Hitachinaka, JP) has applied for United States Patent (USP) " Method
of measuring hydrogen concentration in member and device of measuring
Hydrogen concentration " (patent No. 7,930,925).
The Taniguchi of Matsushita Electric Industrial Co., Ltd. (Osaka, JP);
Noboru (Osaka, JP) has applied for United States Patent (USP) " Hydrogen sensor, hydrogen sensor device and
Method of detecting hydrogen concentration " (patent No. 7,235,171).
The Kiesele of Dragerwerk Aktiengesellschaft (DE); Herbert (Lubeck, DE),
Tschuncky;Peter (Lubeck, DE) has applied for United States Patent (USP) " Process and device for monitoring
The hydrogen concentration " (patent No. 7,175,753).
Alps Electric Co., Ltd. (Tokyo, JP) Honda Motor Co., Ltd. (Tokyo, JP)
Ito; Takuo (Miyagi-Ken, JP), Ono; Yasuichi (Miyagi-ken, JP), Konno;
Toshiaki (Miyagi-ken, JP), Nuiya;Yoshio (Saitama-ken, JP) has applied for United States Patent (USP)
《Hydrogen sensor, apparatus for measuring hydrogen concentration, and method
For measuring hydrogen concentration " (7,174,768).
The Shimada of Honda Motor Co., Ltd. (Tokyo, JP); Toshiaki (Wako, JP),
Nuiya;Yoshio (Wako, JP) has applied for United States Patent (USP) " Method of detecting a hydrogen
Concentration and apparatus for detecting hydrogen " (7,134,317).
The Keating, Jr. of Combustion Engineering, Inc. (Windsor, CT); Stephen
Joseph (West Hartford, CT) has applied for United States Patent (USP) " Hydrogen concentration control
Utilizing a hydrogen permeable membrane " (3,975,170).
In terms of Deutsche Bundespatent:
The NEMER JOSEPH C of ROSEMOUNT ANALYTICAL INC;STOJKOV MARK D application Deutsche Bundespatent "
Insitu heated oxygen probe with intrinsically safe output " (the patent No.
AU002014265625B2).
The GONG HENRY application of ROOBUCK PTY LTD Deutsche Bundespatent " An intrinsically safe LED
Strap " (patent No. AU002014101210A4).
The BILLINGERNST MARTIN of XYLEM IP HOLDINGS LLC; FIEKENS RALF; FIETZEK
REINER application Deutsche Bundespatent " Lightweight, intrinsically safe ozone the electrode " (patent No.
AU002012208787B2).
The KASTNER JOACHIM application of F LOWCOMP SYSTEMTECHNIK GMBH Deutsche Bundespatent "
DETERMINING THE CONSTITUTION OF COMBUSTIBLE GASES BY MEASURING THE
THERMALCONDUCTIVITY, THERMAL CAPACITY AND CARBON DIOXIDE CONTENT " (the patent No.
AU002003250779A1).
The DELAUNAY DIDIER of UNIV NANTES; JARNY YVON;JURKOWSKI THOMASZ application moral
State's patent " Device for measuring parameters such as thermalconductivity or heat
capacity of an injectable or non-injectable material and method of
Identifying said parameters " (patent No. A U000004966493A).
The ARAKI YASUSHI, JP of TOYOTA MOTOR CO LTD, JP;USAMI SHO, JP application is German specially
Sharp " HYDROGEN CONCENTRATION MEASUREMENT DEVICE AND FUEL CELL SYSTEM " (patent No.
CA000002738889C).
The KANAI TOMOMI, JP of ATSUMITEC KK, JP;UCHIYAMA NAOKI, JP application Deutsche Bundespatent
《HYDROGEN GAS CONCENTRATION SENSOR AND APPARATUS FOR DETERMINING HYDROGEN GAS
CONCENTRATION " (patent No. CA000002659166A1).
The BONHOMME THIERRY, FR of COMMISSARIAT ENERGIE ATOMIQUE, FR; PEREZ
CHRISTIAN, FR;RONGIER PIERRE, FR application Deutsche Bundespatent " DEVICE FOR MEASURING THE
CONCENTRATION OF HYDROGEN IN A GASEOUS MIXTURE " (patent No. CA000002338612C).
In terms of Japan Patent:
The vegetarian rattan of Yokogawa Electric Corporation；Tanaka's health is wide to have applied for Japan Patent " intrinsic safety of resistance to pressing-in force power output Den send device " (specially
Benefit JP, 2018-128911, A).
Numerous person of outstanding talent on the well of IDEC Corp.；On wingceltis and just applying Japan Patent " intrinsic safety machine power supply device and
び intrinsic safety machine method of supplying power " (patent No. JP, 2008-109854, A).
Numerous person of outstanding talent on the well of IDEC Corp.；On wingceltis and just applying Japan Patent " intrinsic safety machine power supply device "
(patent No. JP, 2004-070709, A).
Toshiba Corporation holds up in his green hill；Victory field is respectable and morally lofty or upright to have applied for that " water element concentration measures シ ス テ system, side to Japan Patent
Method and び プ ロ グ ラ system " (patent No. JP, 2019-002707, A).
The Hasegawa Xiang of Mitsubishi Heavy Industry Ltd. is flat；It is right close great pungent to have applied for Japan Patent " water element concentration measurement dress
Set " (patent No. JP, 2018-004593, A).
His Liu Shengji cyclopentadienyl of Toshiba Corporation；Middle village Xiu Shu；Plumage gives birth to benevolence application Japan Patent, and " atomic force arranges use
Water element concentration mensuration sub-prime and び water element concentration measurement apparatus " (patent No. JP, 2017-083190, A).
It is dense in intrinsic safety type mechanical structure, intrinsic safety type circuit structure, the heat-conducted hydrogen of raising from the point of view of above-mentioned data at home and abroad
Degree instrument accuracy, it is anticorrosive, prevent sensor pollution aspect, be made very outstanding, but above-mentioned data does not refer to that hydrogen is dense
The automatic cleaning of instrument sensor is spent, sensor once pollutes, it is necessary to which dismantling density of hydrogen instrument is cleaned by hand.In demolishing process
It must stop to send instrument power, screwdriver dismounts electrical wiring, and spanner dismounts hydrogen gas circuit, the two links are not only to technical staff
Professional standards require high, and labor intensive also produces pyrophoric possibility during spanner.The present apparatus does not need hand
Work, which disassembles density of hydrogen instrument, to carry out nitrogen circulation cleaning to sensor, because design has heating and dehumidification device, efficiency
More original method improves 5 times, and present apparatus circuit parameter has very high cleaning efficiency and safety according to substantial safety-design
Energy.
Summary of the invention
To solve above-mentioned the deficiencies in the prior art, this patent devises intrinsic safety type generator thermal conduction density of hydrogen instrument sensing
Device dedicated cleaner.
Present apparatus work structuring is: cleaning gas circuit is sequentially connected filter F ILTER, heater HEATER, dehumidifier
DE, diaphragm aspiration pump PUMP, nitrogen gas tank NITROGEN CANISTER, 23 three-way electromagnetic valve V1V2, density of hydrogen instrument sensor.2
3 three-way electromagnetic valve V1V2 of position are responsible for switching over density of hydrogen instrument from original hydrogen measurement gas circuit, are switched into clean cycle gas circuit,
Then it carries out purging with the nitrogen after heating and dehumidification to clean, pollutant is finally attached on filter F ILTER.
The present apparatus includes: 23 three-way electromagnetic valve V1V2, filter F ILTER, heater HEATER, dehumidifier DE, diaphragm pumping
Air pump PUMP, nitrogen gas tank NITROGEN CANISTER, DC decompression converter U1, temperature sensor PT100, temperature A/D U2,
Main control chip U3, humidity sensor U4, solid-state relay U5U6U7U8U9.
23 three-way electromagnetic valve V1V2 connection solid-state relay U8U9；Heater HEATER connection solid-state relay U7；Dehumidifying
Device DE connection solid-state relay U5；Diaphragm aspiration pump PUMP connection solid-state relay U6；DC decompression converter U1 is separately connected
Temperature A/D U2, main control chip U3, humidity sensor U4, solid-state relay U5U6U7U8U9；Temperature sensor PT100 connection temperature
A/D U2 is spent, main control chip U3 is separately connected temperature connection A/D U2, humidity sensor U4, solid-state relay U5U6U7U8U9.
Present apparatus workflow is: by BUTTON1, device starting then drives 23 three-way electromagnetic valves V1 and V2, by hydrogen
The inlet and outlet of densimeter switch to this cleaning device, and then aspiration pump PUMP is powered on, subsequent nitrogen gas tank NITROGEN
Nitrogen in CANISTER is extracted, and is powered on post-heater HEATER, according to the feedback of temp probe PT100, heating
To predetermined temperature, subsequent dehumidifier DE is powered on, and according to the feedback of moisture probe U4, dehumidifying to predetermined moisture is hereinafter, then
Nitrogen recycles in entire gas return path, successively passes through filter F ILTER, heater HEATER, dehumidifier DE, aspiration pump
PUMP, nitrogen gas tank NITROGEN CANISTER, temp probe PT100, density of hydrogen instrument sensor HYDROGEN SENSOR, most
Density of hydrogen instrument sensor cleaning afterwards finishes, and by BUTTON2, device stops, and 23 three-way electromagnetic valve V1 and V2 power loss are dense by hydrogen
The inlet and outlet switchback of degree meter normally measures gas circuit.
Compared with the existing technology, the beneficial effect of this patent is:
1. the present apparatus does not need to disassemble density of hydrogen instrument by hand, so that it may carry out nitrogen circulation cleaning to sensor；
2. present apparatus design has heating and dehumidification device, the more original manual method of efficiency improves 5 times；
3. present apparatus circuit parameter has very high security performance according to substantial safety-design.
Detailed description of the invention
Fig. 1 is the work structuring figure of the present apparatus.
Fig. 2 is the work flow diagram of the present apparatus.
Fig. 3 is the circuit diagram of the present apparatus.
Be respectively in figure: 23 three-way electromagnetic valve V1V2, filter F ILTER, heater HEATER, dehumidifier DE, diaphragm are taken out
Air pump PUMP, nitrogen gas tank NITROGEN CANISTER, DC decompression converter U1, temperature sensor PT100, temperature A/D
U2, main control chip U3, humidity sensor U4, solid-state relay U5U6U7U8U9.
Specific embodiment
The preferred embodiment of this patent is described in detail with reference to the accompanying drawing, so that the advantages of this patent and feature energy
It is easy to be readily appreciated by one skilled in the art, so that the protection scope to this patent is more clearly defined, should manages
Solution, specific embodiment described herein only to explain this patent, are not used to limit this patent.
Work structuring figure attached drawing 1 is please referred to, cleaning gas circuit is sequentially connected filter F ILTER, and heater HEATER is removed
Wet device DE, diaphragm aspiration pump PUMP, nitrogen gas tank NITROGEN CANISTER, 23 three-way electromagnetic valve V1V2, density of hydrogen instrument pass
Sensor.23 three-way electromagnetic valve V1V2 are responsible for switching over density of hydrogen instrument from original hydrogen measurement gas circuit, are switched into cleaning and follow
Then ring gas circuit carries out purging with the nitrogen after heating and dehumidification and cleans, pollutant is finally attached on filter F ILTER.
Please refer to work flow diagram attached drawing 2, by BUTTON1, device starting, then drive two-position three way magnetic valve V1 and
The inlet and outlet of density of hydrogen meter are switched to this cleaning device by V2, and then aspiration pump PUMP is powered on, subsequent nitrogen gas tank
Nitrogen in NITROGEN CANISTER is extracted, and is powered on post-heater HEATER, according to temp probe PT100's
Feedback, is heated to predetermined temperature, and subsequent dehumidifier DE is powered on, and according to the feedback of moisture probe U4, predetermined moisture is arrived in dehumidifying
Hereinafter, then nitrogen recycles in entire gas return path, successively pass through filter F ILTER, heater HEATER, dehumidifier DE,
Aspiration pump PUMP, nitrogen gas tank NITROGEN CANISTER, temp probe PT100, density of hydrogen instrument sensor HYDROGEN
SENSOR, last density of hydrogen instrument sensor cleaning finishes, and by BUTTON2, device stops, and two-position three way magnetic valve V1 and V2 lose
The inlet and outlet switchback of density of hydrogen meter is normally measured gas circuit by electricity.
Please refer to circuit diagram attached drawing 3, intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner, packet
It includes: 23 three-way electromagnetic valve V1V2, filter F ILTER, heater HEATER, dehumidifier DE, diaphragm aspiration pump PUMP, nitrogen gas tank
NITROGEN CANISTER, DC decompression converter U1, temperature sensor PT100, temperature A/D U2, main control chip U3, humidity
Sensor U4, solid-state relay U5U6U7U8U9.
DC decompression converter U1 is separately connected temperature A/D U2, main control chip U3, humidity sensor U4, solid-state relay
U5U6U7U8U9 provides power supply for them.
DC decompression converter U1 uses low-power consumption DC-DC converter MP2359, and pin IN and GND access DC18V power supply,
SW pin exports DC3.3V power supply, supplies other chip operations.DC18V+ enters the load end of U5U6U7U8U9.
Temp probe PT100 connection temperature A/D U2, temp probe PT100 use three-wire system, can be with compensated line to survey
The influence of magnitude.
The VCC of temperature A/D U2 is DC3.3V, and tri- pins of FORCE+, RTDIN+, RTDIN- receive the signal of PT100.
The external ambient temperature compensation resistance of REFin+ and REFin- pin, the data-interface of temperature A/D U2 are connected to main control chip U3.
The pin 13 and 14 of main control chip U3 external explosion-proof button BUTTON1 and BUTTON2, BUTTON1 and BUTTON2 are used
In starting and stopping whole device.Pin 13 and 14 is 2.85V when not operating, and low level is effective.
The external crystal oscillating circuit of pin 9 and 10 of main control chip U3.
The VCC of humidity sensor U4 is DC3.3V, and moisture signal is input to 22 pins of main control chip U3 by Vout pin,
Range is DC0-2.85V.
Main control chip U3 is separately connected solid-state relay U5U6U7U8U9, solid-state relay U5U6U7U8U9 load end power supply
Power supply is DC18V, and the pin 28 of main control chip U3 controls solid-state relay U5, and high level 2.85V is effective, and main control chip U3's draws
Foot 25 controls solid-state relay U6, and high level 2.85V is effective, and the pin 27 of main control chip U3 controls solid-state relay U7, high electricity
Flat 2.85V is effective, and the pin 24 of main control chip U3 controls solid-state relay U8, and high level 2.85V is effective, and main control chip U3's draws
Foot 23 controls solid-state relay U9, and high level 2.85V is effective.
The load end of solid-state relay U5 controls dehumidifier DE；
The load end of solid-state relay U6 controls diaphragm aspiration pump PUMP；
The load end of solid-state relay U7 controls heater HEATER；
The load end of solid-state relay U8 controls 23 three-way electromagnetic valve V1；
The load end of solid-state relay U9 controls 23 three-way electromagnetic valve V2.
Intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner, it is characterised in that: 23 energization magnetic
Valve V1V2 uses ASCO EF8225, diaphragm aspiration pump PUMP that KNF3918, DC decompression converter U1 is used to use MP2359, temperature
Spending A/D U2 uses MAX31865ATP, main control chip U3 that PIC16F882, humidity sensor U4 is used to use HM1520LF, solid-state
Relay U5U6U7U8U9 uses SSR-0.5A.
The basic principles and main features and advantage of this patent have been shown and described above.The technical staff of the industry should
Understand, this patent is not restricted to the described embodiments, and the description in above embodiments and description only illustrates this patent
Principle, under the premise of not departing from this patent spirit and scope, this patent be will also have various changes and improvements, these change and change
Into both falling within the scope of claimed this patent.Range is claimed by appended claims and its equivalent in this patent
It defines.
Claims (8)
1. intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner, it is characterised in that: it is powered including 23
Magnet valve V1V2, filter F ILTER, heater HEATER, dehumidifier DE, diaphragm aspiration pump PUMP, nitrogen gas tank NITROGEN
CANISTER, DC decompression converter U1, temperature sensor PT100, temperature A/D U2, main control chip U3, humidity sensor
U4, solid-state relay U5U6U7U8U9;23 three-way electromagnetic valve V1V2 connection solid-state relay U8U9;Heater HEATER connection
Solid-state relay U7;Dehumidifier DE connection solid-state relay U5;Diaphragm aspiration pump PUMP connection solid-state relay U6;Direct current drop
Pressure converter U1 is separately connected temperature A/D U2, main control chip U3, humidity sensor U4, solid-state relay U5U6U7U8U9;Temperature
Sensor PT100 connection temperature A/D U2 is spent, main control chip U3 is separately connected temperature connection A/D U2, humidity sensor U4, Gu
State relay U5U6U7U8U9.
2. intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner according to claim 1, special
Sign is: 23 three-way electromagnetic valve V1V2 use ASCO EF8225.
3. intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner according to claim 1, special
Sign is: diaphragm aspiration pump PUMP uses KNF3918.
4. intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner according to claim 1, special
Sign is: DC decompression converter U1 uses MP2359.
5. intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner according to claim 1, special
Sign is: temperature A/D U2 uses MAX31865ATP.
6. intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner according to claim 1, special
Sign is: main control chip U3 uses PIC16F882.
7. intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner according to claim 1, special
Sign is: humidity sensor U4 uses HM1520LF.
8. intrinsic safety type generator thermal conduction density of hydrogen instrument sensor dedicated cleaner according to claim 1, special
Sign is: solid-state relay U5U6U7U8U9 uses SSR-0.5A.
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Application publication date: 20190607 |