CN104198133A - Detection method for oil and gas recovery system of oil tank truck - Google Patents
Detection method for oil and gas recovery system of oil tank truck Download PDFInfo
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- CN104198133A CN104198133A CN201410381248.7A CN201410381248A CN104198133A CN 104198133 A CN104198133 A CN 104198133A CN 201410381248 A CN201410381248 A CN 201410381248A CN 104198133 A CN104198133 A CN 104198133A
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- recovery system
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Abstract
The invention provides a detection method for the oil and gas recovery system of an oil tank truck. The detection method is mainly characterized in that the used digital pressure sensor is used for carrying out positive pressurization detection and negative pressurization detection on the oil and gas recovery system, and carrying out positive pressurization detection on an oil and gas recovery pipeline, and displaying detection data in real time; the present problems of detecting by virtue of a mechanical pressure gauge and manually recording the detection data are solved; the digital pressure sensor used for detecting the pressure of the system outputs a current signal of 4-20mA, the current signal is converted to a standard voltage signal of 0-5V through a conversion circuit and then data is transmitted to a microprocessor through AD conversion, the microprocessor processes the received data and then displays the pressure value in real time, and detection personnel can judge whether the oil and gas recovery system of the oil tank truck is qualified through the displayed value.
Description
Technical field
The invention belongs to tank wagon technical field, be specifically related to a kind of tank wagon gas recovery system for oil detection method.
Background technology
Tank wagon is as the transport facility between refinery, oil depot and refuelling station by a large amount of uses, and energy loss and problem of environmental pollution that oil gas volatilization causes are also more and more serious.If tank wagon gas recovery system for oil cisco unity malfunction causes oil gas to leak, will bring serious potential safety hazard to oil depot, refuelling station, tank wagon.Therefore tank wagon gas recovery system for oil being detected is present problem in the urgent need to address, the detection of the tank wagon gas recovery system for oil of China at present adopts the simple detection device that mechanical compression table, pressue device, vacuum pump, blowdown valve, sleeve etc. form mostly, and detection efficiency is low, accuracy of detection is not high, be difficult to reach the requirement that < < gasoline transports atmosphere pollutants emission standards > > (GB20951-2007).
Summary of the invention
The object of the invention is to solve the deficiency of existing detection, a kind of reasonable in design, detection efficiency is high, accuracy of detection is high, simple to operate tank wagon gas recovery system for oil detection method is provided.
Technical scheme of the present invention is:
A tank wagon gas recovery system for oil detection method, adopts digital pressure sensor, and tank wagon gas recovery system for oil is carried out to leakproofness detection, will detect data transmission to microprocessor simultaneously, and shows in real time detection data.
Pressure transducer of the present invention, the small positive/negative pressure of can detect-5～10kpa, and the current signal of linear output 4～20mA.
The output terminal of pressure transducer of the present invention connects current-to-voltage converting circuit, 4～20mA current signal of sensor output is converted to the standard voltage signal of 0～5V.
Microprocessor of the present invention and AD conversion chip carry out calculation process by the voltage signal of 0～5V and obtain accurate pressure value.
Detection method of the present invention can show the pressure value of detection in real time.
It is nitrogen that tank wagon gas recovery system for oil leakproofness of the present invention detects pressurized gas.
Compared with prior art, the present invention has the following advantages: adopt digital pressure sensor to replace mechanical pressure gauge, will detect Data Digital and show, greatly reduced testing staff's workload, improved detection efficiency; Adopt microprocessor to carry out filtering and noise reduction processing to data, greatly improved accuracy of detection, guaranteed to detect the reliability of data; Adopt real-time digital display technique, be convenient to promptly and accurately show testing result.
Accompanying drawing explanation
Accompanying drawing is that tank wagon gas recovery system for oil detects schematic diagram
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail.
A tank wagon gas recovery system for oil, detection method comprises that just pressurizeing detection, tank wagon oil gas recovery line just pressurizeed and detected and the negative pressurization of tank wagon gas recovery system for oil detects to tank wagon gas recovery system for oil.
Accompanying drawing is that tank wagon gas recovery system for oil detects schematic diagram, and pick-up unit comprises digital pressure sensor, AD conversion chip, microprocessor, display screen.System power supply adopts direct current 5V power supply.
The main testing process of tank wagon gas recovery system for oil:
1, tank wagon gas recovery system for oil is detected to front wash oil tank car bunker, at pressurization mouth, be filled with nitrogen, adjusting pressure release valve makes detection system and tank wagon bunker pressure stability to 4.5kpa, detection system pressure after 5min, the current signal of digital pressure sensor output 4～20mA is converted to the voltage signal of 0～5V through current-to-voltage converting circuit, by AD chip, be converted to digital data transmission to microprocessor again, microprocessor is processed transformation result to obtain pressure value and be presented on display screen.
Secondly 2, to detections of just pressurizeing of oil gas recovery line operated pneumatic valve leakproofness: close oil gas recovery line valve after bunker is forced into 4.5kpa, oil gas recovery channel and bunker are isolated, 5min reads force value afterwards;
3, finally open vacuum pump valve, to Closed gas system evacuated pressure, pressure stability, after-1.5kpa, is closed vacuum pump valve, records force value after 5min.
Described microprocessor compares detection numerical value and standard value, and underproof numerical value meeting trigger alarm device, reminds testing staff's tank wagon to detect defective, has greatly improved detection efficiency.
It is emphasized that; embodiment of the present invention is illustrative; rather than determinate; therefore the present invention includes and be not limited to the embodiment described in embodiment; other embodiments that every those skilled in the art technical scheme according to the present invention draws, belong to the scope of protection of the invention equally.
Claims (4)
1. a tank wagon gas recovery system for oil detection method, is characterized in that: adopt digital pressure sensor, tank wagon gas recovery system for oil is carried out to leakproofness detection, will detect data transmission simultaneously to microprocessor, and show in real time detection data.
2. a kind of tank wagon gas recovery system for oil detection method according to claim 1, is characterized in that the pressure transducer that adopts, the small positive/negative pressure of can detect-5～10kpa, and the current signal of linear output 4～20mA.
3. a kind of tank wagon gas recovery system for oil detection method according to claim 2, what it is characterized in that connecting sensor output terminal is current-to-voltage converting circuit, 4～20mA current signal of sensor output is converted to the standard voltage signal of 0～5V.
4. a kind of tank wagon gas recovery system for oil detection method according to claim 3, is characterized in that adopting microprocessor and AD conversion chip to carry out calculation process to 0～5V voltage signal, obtains accurate pressure value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381248.7A CN104198133A (en) | 2014-07-30 | 2014-07-30 | Detection method for oil and gas recovery system of oil tank truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381248.7A CN104198133A (en) | 2014-07-30 | 2014-07-30 | Detection method for oil and gas recovery system of oil tank truck |
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| Publication Number | Publication Date |
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| CN104198133A true CN104198133A (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410381248.7A Pending CN104198133A (en) | 2014-07-30 | 2014-07-30 | Detection method for oil and gas recovery system of oil tank truck |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792481A (en) * | 2015-03-31 | 2015-07-22 | 广州特种承压设备检测研究院 | Device and method for detecting leakproofness of oil gas recycling systems of oil tank trucks |
| CN105004494A (en) * | 2015-08-10 | 2015-10-28 | 中国汽车技术研究中心 | Oil tank car oil gas recovery system sealing performance detection platform and detection method |
| CN106500934A (en) * | 2016-12-29 | 2017-03-15 | 青岛崂应环境科技有限公司 | A kind of oil truck petroleum vapor recovery detection means and detection method |
| CN107677434A (en) * | 2017-11-22 | 2018-02-09 | 无锡市计量测试院 | The detection means of oil truck gas recovery system for oil |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792481A (en) * | 2015-03-31 | 2015-07-22 | 广州特种承压设备检测研究院 | Device and method for detecting leakproofness of oil gas recycling systems of oil tank trucks |
| CN105004494A (en) * | 2015-08-10 | 2015-10-28 | 中国汽车技术研究中心 | Oil tank car oil gas recovery system sealing performance detection platform and detection method |
| CN106500934A (en) * | 2016-12-29 | 2017-03-15 | 青岛崂应环境科技有限公司 | A kind of oil truck petroleum vapor recovery detection means and detection method |
| CN107677434A (en) * | 2017-11-22 | 2018-02-09 | 无锡市计量测试院 | The detection means of oil truck gas recovery system for oil |
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Application publication date: 20141210 |
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