CN204694634U - Oil carrier cargo tank emergent gas gas concentration pick-up unit - Google Patents
Oil carrier cargo tank emergent gas gas concentration pick-up unit Download PDFInfo
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- CN204694634U CN204694634U CN201520243991.6U CN201520243991U CN204694634U CN 204694634 U CN204694634 U CN 204694634U CN 201520243991 U CN201520243991 U CN 201520243991U CN 204694634 U CN204694634 U CN 204694634U
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- gas
- gas concentration
- measuring chamber
- pressure vessel
- cargo tank
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Abstract
The utility model relates to a kind of oil carrier cargo tank emergent gas gas concentration pick-up unit, it is characterized in that: comprising: the blower fan connected successively, pressure vessel, measuring chamber, sensor, microprocessor and display, compared with prior art, the utility model has the advantage of that oil gas to be measured is evacuated in pressure vessel by blower fan, pass in measuring chamber again and detect, through the current signal that sensor exports, the signal sent through microprocessor processes sensor after obtaining gas concentration data, the gas concentration data received are shown over the display in real time, so not only achieve real-time online to detect, so that staff takes measure effectively in time, and it is comparatively accurate to detect oil gas, cost is comparatively cheap, fast, easy to use, meet the calibrating requirement of combustible gas and oil and gas detection alarm, the waste of oil gas can greatly be reduced and improve the safety of boats and ships and personnel.
Description
Technical field
The utility model relates to oil carrier gas concentration detection technique field, particularly relates to a kind ofly to monitor in real time and detect the pick-up unit of the emergent gas gas concentration of oil carrier cargo tank room fast.
Background technology
Oil carrier can make oil product constantly volatilize oil gas due to factors such as variation of ambient temperature and the oil carrier shakes in operational process in the process filling oil product transport, what top, oil carrier cargo tank space was constantly gathered reaches finite concentration containing oil vapour and oxygen, due under the effect such as thermal source, electrostatic, fire or blast may be led to.
The many employings of existing oil tanker are filled with inert gas and maintain gas and oil equilibration in cabin by boats and ships vacuum pressure valve and vacuum pressure valve assembly to the method for air Exhaust Gas in cargo tank: be namely filled with a certain amount of inert gas to top, oil carrier cargo tank space, oil gas then in cargo tank and the percent by volume of oxygen will reduce, and just can avoid cargo tank breaking out of fire or blast when the percent by volume of oil gas and oxygen is reduced to certain value.When the oil product in cargo tank constantly volatilizes oil gas, the pressure of mixed gas in cargo tank is caused constantly to raise, when the pressure in cargo tank higher than boats and ships vacuum pressure valve open valve pressure time, vacuum pressure valve is opened automatically, mixed gas discharges outboard through vacuum pressure valve, until when mixture pressure is reduced to the pass valve pressure of vacuum pressure valve, vacuum pressure valve cuts out automatically, oil gas now in cargo tank and oxygen content are lower than the limiting concentration corresponding to catching fire and exploding, significantly reduce the risk of oil carrier breaking out of fire and blast, ensure that the safety of boats and ships and personnel.
But the method for oil gas is discharged by boats and ships vacuum pressure valve and vacuum pressure valve assembly, unavoidably there will be unnecessary liquid goods damage and lose.In addition, this kind of mode accurately can not monitor oil gas situation in cabin in real time, oil carrier is made still to there is certain risk in the process of transporting oil products, vacuum pressure valve damages, human users is improper etc. still may cause cargo tank fire or blast, and also can cause certain harm to personnel and environment by the oil gas that boats and ships vacuum pressure valve and vacuum pressure valve assembly are discharged.
Conveniently carry out effectively, dynamically, accurately carrying out to gas concentration testing, need to be improved further existing oil and gas detection device.
Summary of the invention
Technical problem to be solved in the utility model be provide for above-mentioned prior art present situation a kind of can continuously, automatically, the oil carrier cargo tank emergent gas gas concentration pick-up unit of on-line checkingi gas concentration.
The utility model solves the problems of the technologies described above adopted technical scheme: this oil carrier cargo tank emergent gas gas concentration pick-up unit, it is characterized in that: comprise blower fan, pressure vessel, measuring chamber, A/D D/A converting circuit chip, DSP microprocessor and display, described blower fan, pressure vessel are communicated with successively with measuring chamber, the infrared sensor of infrared light-emitting device and reception infrared signal is provided with in described measuring chamber, described A/D D/A converting circuit chip connects described infrared sensor and DSP microprocessor respectively, and described DSP microprocessor connects display; Wherein,
Described blower fan, for extracting out gas from cargo tank room;
Described pressure vessel, for eliminating the pressure of the gas of discharging from described blower fan;
Described measuring chamber, for storing by the gas inputted in pressure vessel, and utilizes the infrared light-emitting device in measuring chamber and infrared sensor, exports the signal of infrared signal after gas to A/D D/A converting circuit chip;
Described infrared light-emitting device, for launching infrared light to the gas in measuring chamber;
Described infrared sensor, for detect infrared light-emitting device send out infrared light and penetrate the signal intensity after gas;
Described A/D D/A converting circuit chip, is converted to digital signal for the simulating signal detected by infrared sensor, and exports to DSP microprocessor;
Described DSP microprocessor, for processing the digital signal received, and calculates acquisition gas concentration data;
Described display, for showing the gas concentration data after DSP microprocessor processes.
Further for obtaining comparatively stable current signal, this oil carrier cargo tank emergent gas gas concentration pick-up unit also comprises signal amplifier rectifier, and described signal amplifier rectifier connects described infrared sensor respectively and is connected described A/D D/A converting circuit chip.The high-accuracy amplification rectification circuit amplifying rectification is carried out with the electric signal exported described sensor.
Take the necessary measures for ease of staff further, described microprocessor is also connected with sound and light alarm module, described sound and light alarm module is used for described gas concentration data to carry out Parameter analysis, if described gas concentration data are higher than preset value, then starts warning.
Further, the air inlet of described blower fan is connected with the solenoid valve group controlling pressurized air and sample gas circulation, and the air outlet of described blower fan connects described pressure vessel.
Further, the adjustable throttling that the gas flow that can discharge pressure vessel regulates is connected with between described pressure vessel and described measuring chamber.Such measuring chamber can carry out oil and gas detection to the gas of discharging from adjustable throttling.
Compared with prior art, the utility model has the advantage of that oil gas to be measured is evacuated in pressure vessel by blower fan, pass in measuring chamber again and detect, through the current signal that sensor exports, the signal sent through microprocessor processes sensor after obtaining gas concentration data, the gas concentration data received are shown over the display in real time, so not only achieve real-time online to detect, so that staff takes measure effectively in time, and package unit is not vulnerable to the interference of environment, detect oil gas comparatively accurate, cost is comparatively cheap, fast, easy to use, meet the calibrating requirement of combustible gas and oil and gas detection alarm, to guarantee oil depot, the safety such as colliery, that avoids personnel to suffocate intoxication accident has vital role, the waste of oil gas can greatly be reduced and improve the safety of boats and ships and personnel.
Accompanying drawing explanation
Fig. 1 is the structural representation of pick-up unit in the utility model embodiment;
Fig. 2 is stabilized voltage supply schematic diagram in the utility model embodiment;
Fig. 3 is voltage-stabilized power supply circuit figure in the utility model embodiment;
Fig. 4 is high-accuracy amplification rectification circuit figure in the utility model embodiment;
Fig. 5 is A/D change-over circuit figure in the utility model embodiment;
Fig. 6 is gas concentration display and sound light alarming circuit figure in the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
As Fig. 1, this oil carrier cargo tank emergent gas gas concentration pick-up unit comprises: the blower fan 2 connected successively, pressure vessel 3, measuring chamber 9, infrared sensor 11, DSP microprocessor 6 and display, wherein, blower fan 2 is for extracting out gas from cargo tank room, pressure vessel 3 is for eliminating the gaseous tension of discharging from blower fan, measuring chamber 9 carries out oil and gas detection for the gas of will discharge in pressure vessel, in order to control the circulation of pressurized air 13 and sample gas 14 better, the air inlet of blower fan 2 is connected with the first two-position two-way solenoid valve 1 and the second two-position two-way solenoid valve 12, the air outlet Bonding pressure container 3 of blower fan 2, the adjustable throttling 23 that the gas flow that can discharge pressure vessel 3 regulates then is connected with between pressure vessel 3 and measuring chamber 9.One end of measuring chamber 9 is provided with the infrared light-emitting device 10 that can send Infrared, the measuring chamber other end is then provided with infrared sensor 11, when infrared sensor 11 measures the gas concentration of measuring chamber and the DSP microprocessor 6 exported to by the signal of gas concentration, the signal that DSP microprocessor 6 can send for the treatment of infrared sensor 11 also obtains gas concentration data, last gas concentration data display on the display 21, DSP microprocessor 6 is also connected with sound and light alarm module 7, sound and light alarm module 7 is for carrying out Parameter analysis by gas concentration data, if gas concentration data are higher than preset value, then start warning.
In addition, be provided with the current signal that can export infrared sensor 11 between sensor 11 and microprocessor 6 and carry out analog-to-digital A/D D/A converting circuit chip 5.And between infrared sensor 11 and A/D D/A converting circuit chip 5, be connected with the signal amplifier rectifier 4 that the electric signal that can export infrared sensor 11 carries out amplifying rectification.Blower fan 2, pressure vessel 3, measuring chamber 9, infrared light-emitting device 10 and DSP microprocessor 6, infrared sensor 11 and display are connected with stabilized voltage supply 8 respectively.
When this oil carrier cargo tank emergent gas gas concentration pick-up unit is started working, DSP microprocessor 6 controls the first two-position two-way solenoid valve 1 right position access pipeline, and the first two-position two-way solenoid valve 1 is closed; Second two-position two-way solenoid valve 12 left position access pipeline, second two-position two-way solenoid valve 12 is opened, oil gas to be measured is evacuated in pressure vessel 3 by blower fan 2, after eliminating by the aperture of adjustable throttling 23 pressure surge caused by blower fan 2, then pass in measuring chamber 9 and detect, after detection, DSP microprocessor 6 controls, first two-position two-way solenoid valve 1 is opened, and the second two-position two-way solenoid valve 12 is closed, compressed air rinsing measuring chamber.The light that infrared light-emitting device 10 sends in measuring chamber 9 arrives the infrared sensor 11 of the other end through gas to be measured, the ac current signal that infrared sensor 11 exports, the signal amplifier rectifier 4 amplifying rectification is entered through infrared sensor 11 output circuit 26, obtain a current signal corresponding with tested gas concentration, the digital signal obtained after A/D D/A converting circuit chip 5 carries out signal A/D conversion sends into DSP microprocessor 6, its arithmetic mean is got after repetitive measurement, digital filtering is carried out again through DSP microprocessor 6, after the process such as temperature compensation, inquiry penetrating light intensity and standard oil gas concentration relationship database, through gas concentration display and sound and light alarm module 7, LCD display 21 demonstrates gas concentration value, as gas concentration reaches dangerous values, then send out LED 20 glittering, hummer 19 sends the sound, warning operator is taken the necessary measures.
Wherein, penetrating light intensity and standard oil gas concentration relationship database are measured by existing oil gas alarm, the function of penetrability and standard oil gas concentration relationship is tried to achieve again through data fitting, again this function is imported in DSP microprocessor, set up the penetrating light intensity based on DSP and standard oil gas concentration relationship database.Standard gas concentration is the oil gas using oil gas and inert gas to be mixed into concentration known by a certain percentage, is referred to as standard oil gas.
As shown in Figures 2 and 3, this device power supply used is stabilized voltage supply, stabilized voltage supply with three-terminal voltage-stabilizing integrated chip LM317 for core, primarily of compositions such as transforming circuit Z1, single phase bridge type rectifier circu Z2, π type LC filtering circuit Z3, mu balanced circuit Z4.Single-phase alternating current, after this few partial circuit, is namely convertible into galvanic current pressure.Wherein, the alternating voltage V1 of 220V is converted to suitable alternating voltage V2 by transforming circuit Z1, re-use single phase bridge type rectifier circu Z2, it is made up of four diodes, its constitution principle is exactly ensure within the whole cycle of transformer secondary voltage V2, voltage and current direction in load is constant all the time, and namely V3 direction is constant.Current amplitude after overcommutation alters a great deal, and can affect the serviceability of whole circuit unavoidably.And adopt π type LC filtering circuit Z3, utilize the characteristic of " logical interchange, the stopping direct current " of electric capacity, two electric capacity in parallel are as capacitor filter in circuit, elimination alternating component wherein.And C1 is low frequency filter, for the alternating component in filtering rectifier output voltage.C2, C3 are high frequency filter, for eliminating high frequency interference, so that output voltage is more reliable and stable.When voltage is excessive, C3 is breakdown, the damage to device element when electric current can be prevented excessive.When the pulsating current after rectification increases, inductance L will produce back-emf-L (di/dt), stop electric current to increase; On the contrary, when the current decreases, inductance L will stop electric current to reduce, thus load current ripple component is reduced greatly, reach the object of filtering.
Adopt mu balanced circuit Z4 that electric power output voltage is stablized, wherein LM317 is three-terminal voltage-stabilizing integrated chip, plays a part burning voltage, exportable DC voltage VO.When current is excessive, diode D5 conducting, prevents three-terminal voltage-stabilizing integrated chip LM317 from damaging.
As shown in Figure 4, the anti-phase operational amplification circuit of two-stage that the amplification of feeble signal is made up of U1 and U2 realizes, and the interchange letter exported by infrared sensor 11 amplifies, and owing to being applied with negative feedback, voltage gain is
Voltage after two-stage reverse amplification circuit
Decided by R1, R2, R3 and R4 by the voltage swing after the known amplification of above formula.Thus this part circuit has gain and other characteristic and is not driven by operational amplifier electrical characteristics, and the advantage only having external circuit to decide, reach the object of high-precision linear and gain.By described two-stage reverse amplification circuit signal out after the preliminary filtering of low frequency capacitive C4, the rectifier circuit rectifies formed via U3, U4, D6, D7.Described rectification circuit can realize full-wave rectification, when u2 is positive half cycle, and D7 conducting, D6 ends, u=u2; When u2 is negative half period, D6 conducting, D7 ends.
As shown in Figure 5, from high-accuracy amplification rectification circuit 4 electric signal out after A/D D/A converting circuit chip 5 converts digital signal to, be passed to DSP microprocessor 6 from P0 oral instructions.
Switch process is:
1, ale signal rising edge is effective, and latch address also chooses respective channel, sensor signal is read in A/D D/A converting circuit chip 5.
2, ST signal is effective, converts sensor signal to digital signal.A/D transition period ST is low level.
3, EOC EOC status signal.After starting conversion, system Lookup protocol EOC=0, after converting, EOC=1.This status signal both can be used as the Status Flag of inquiry, can use again as interrupt request singal.
4, OE signal is effective, allows to export transformation result.As OE=0, output data line is high resistance; As OE=1, by digital signal by P0 mouth input DSP microprocessor 6.
Be below described A/D program:
As shown in Figure 6, to inquire about after penetrating light intensity and standard oil gas concentration relationship database gained gas concentration through DSP microprocessor 6 to show through gas concentration and sound and light alarm module 7 is shown by LCD display 21.Gas concentration display and sound and light alarm module 7 are made up of eight road positive buffer/line driver 16 and 17, resistance R11 ~ R20, light-emitting diode display 21, LED 20, hummer 19, triode 18.
When the digital signal of gas concentration is exported by the P3 mouth of DSP microprocessor 6, first after eight road positive buffer/line driver 16 and 17 cushion, demonstrate gas concentration by light-emitting diode display 21.DSP microprocessor 6 judges simultaneously, DSP microprocessor 6 control P1.0 and P1.1 action when gas concentration exceedes early warning value, electric current is amplified into LED 20 and hummer 19 through triode 18, give the alarm, prompting operator on duty take the necessary measures, and eight road positive buffer/line driver 16 and 17 have the effect of ternary output, play as the effect of light-emitting diode display 21 buffer current, prevent that electric current is excessive burns out element.
Claims (5)
1. an oil carrier cargo tank emergent gas gas concentration pick-up unit, it is characterized in that: comprise blower fan (2), pressure vessel (3), measuring chamber (9), A/D D/A converting circuit chip (5), DSP microprocessor (6) and display (21), described blower fan (2), pressure vessel (3) is communicated with successively with measuring chamber (9), the infrared sensor (11) of infrared light-emitting device (10) and reception infrared signal is provided with in described measuring chamber (9), described A/D D/A converting circuit chip (5) connects described infrared sensor (11) and DSP microprocessor (6) respectively, described DSP microprocessor (6) connects display (21), wherein,
Described blower fan (2), for extracting out gas from cargo tank room;
Described pressure vessel (3), for eliminating the pressure of the gas of discharging from described blower fan;
Described measuring chamber (9), for storing by the gas inputted in pressure vessel, and utilize the infrared light-emitting device (10) in measuring chamber (9) and infrared sensor (11), export the signal of infrared signal after gas to A/D D/A converting circuit chip (5);
Described infrared light-emitting device (10), for launching infrared light to the gas in measuring chamber (9);
Described infrared sensor (11), for detect infrared light-emitting device (10) send out infrared light and penetrate the signal intensity after gas;
Described A/D D/A converting circuit chip (5), is converted to digital signal for the simulating signal detected by infrared sensor (11), and exports to DSP microprocessor (6);
Described DSP microprocessor (6), for processing the digital signal received, and calculates acquisition gas concentration data;
Described display (21), shows for the gas concentration data after being processed by DSP microprocessor (6).
2. oil carrier cargo tank emergent gas gas concentration pick-up unit according to claim 1, it is characterized in that: also comprise signal amplifier rectifier (4), described signal amplifier rectifier (4) connects described infrared sensor (11) respectively and is connected described A/D D/A converting circuit chip (5).
3. oil carrier cargo tank emergent gas gas concentration pick-up unit according to claim 1, it is characterized in that: described microprocessor (6) is also connected with sound and light alarm module (7), described sound and light alarm module (7) is for carrying out Parameter analysis by described gas concentration data, if described gas concentration data higher than preset value, then start warning.
4. oil carrier cargo tank emergent gas gas concentration pick-up unit according to claim 1, it is characterized in that: the air inlet of described blower fan (2) is connected with the solenoid valve group controlling pressurized air and sample gas circulation, and the air outlet of described blower fan (2) connects described pressure vessel (3).
5. oil carrier cargo tank emergent gas gas concentration pick-up unit according to claim 1, is characterized in that: be connected with the adjustable throttling (23) that the gas flow that can discharge pressure vessel (3) regulates between described pressure vessel (3) and described measuring chamber (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520243991.6U CN204694634U (en) | 2015-04-21 | 2015-04-21 | Oil carrier cargo tank emergent gas gas concentration pick-up unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520243991.6U CN204694634U (en) | 2015-04-21 | 2015-04-21 | Oil carrier cargo tank emergent gas gas concentration pick-up unit |
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| CN204694634U true CN204694634U (en) | 2015-10-07 |
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| CN201520243991.6U Expired - Fee Related CN204694634U (en) | 2015-04-21 | 2015-04-21 | Oil carrier cargo tank emergent gas gas concentration pick-up unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094900A (en) * | 2016-08-01 | 2016-11-09 | 深圳市派康科技有限公司 | The monitoring device of anesthesia gas concentration and monitoring method |
| CN110626485A (en) * | 2019-10-22 | 2019-12-31 | 江龙船艇科技股份有限公司 | Inerting system and method for methanol cabin cabinet of ship |
-
2015
- 2015-04-21 CN CN201520243991.6U patent/CN204694634U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094900A (en) * | 2016-08-01 | 2016-11-09 | 深圳市派康科技有限公司 | The monitoring device of anesthesia gas concentration and monitoring method |
| CN110626485A (en) * | 2019-10-22 | 2019-12-31 | 江龙船艇科技股份有限公司 | Inerting system and method for methanol cabin cabinet of ship |
| CN110626485B (en) * | 2019-10-22 | 2024-01-09 | 江龙船艇科技股份有限公司 | Inerting method of ship methanol tank inerting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20160421 |
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| CF01 | Termination of patent right due to non-payment of annual fee |