CN101995341A - Method and instrument for detecting oil gas recovery system of gas station - Google Patents

Abstract

The invention relates to a method and instrument for detecting an oil gas recovery system of a gas station, in particular to an oil gas recovery detecting method and an intelligent detecting instrument, wherein the detecting method comprises the step of detecting the tightness, the liquid resistance and the gas liquid ratio of the oil gas recovery system of the gas station according to the programmed sequence by adopting a flow and pressure matching mode, and the detection data is automatically saved and can be printed on the spot or transmitted to a computer; and the intelligent detecting instrument comprises an anti-explosion circuit system and a closed gas path system, wherein the anti-explosion circuit system comprises a power supply source, a Roots flow sensor, a digital pressure sensor, a display screen, an input keyboard, a single chip microcomputer processing module, a data memory, a printer interface, a data transmission interface and the like, the closed gas path system comprises a flow sensor, a pressure sensor, a pipe fitting, a flexible pipe and a quick joint, and the circuit system and the gas path system are matched with a panel to be integrally installed in a box body. The detecting method of the invention is distinct, flexible, simple and convenient; and the detecting instrument of the invention has compact structure and perfect functions and can be carried, used, maintained and repaired simply and easily.

Description

Method and instrument that refuelling station's gas recovery system for oil detects

Technical field

The invention belongs to the equipment of the detection method and the implementation method of refuelling station's gas recovery system for oil, particularly the sequencing of gas recovery system for oil leakproofness, liquid resistance, gas liquid ratio, standardization, robotization, the intelligent detection.

Background technology

Along with the economic society fast development, China's automobile, refuelling station's quantity are increasing, the pollution problem of refuelling station has obtained the extensive attention of society, and the oil gas that overflows in group refueling and oil product transportation becomes urgent problem to environment damage and to the waste of resource.Refuelling station's oil gas reclaims and transforms is trend of the times, imperative.The oil gas of refuelling station reclaims to be divided into and receives oil and two stages of hair oil, and the oil gas that is called phase one, subordinate phase reclaims.

Phase one oil gas reclaims and is also referred to as the recovery of emptying oil gas, it is the stage of receiving oil at buried tank, when tank lorry unloads gasoline, the oil gas of the equal volume that produces in the buried tank is collected by air-tight manner and is entered in the tank lorry jar, and tank wagon is taken back oil depot with the oil gas that reclaims and focused on.

Subordinate phase oil gas reclaims and is also referred to as the recovery of oiling oil gas, when being meant group refueling, utilize the gas-returning devices on the nozzle, with originally by the oil tank of vehicle loss in airborne oil gas through the return-air mouth of nozzle, the muffler that links to each other with nozzle, the vacuum pump of bleeding, and vacuum pump is to the vapor return line of underground petrol tank, and the oil gas that produces when refueling a car is collected to enter by air-tight manner and buried the ground oil tank, and the oil gas that reclaims is stored in pressurize in the underground petrol tank, do not do discharging.The rate of air sucked in required of nozzle and the volume ratio of volume read-out approached 1: 1, promptly whenever add 1L oil, the underground petrol tank liquid level descends and produces the 1L space, and the oil gas that simultaneously reclaims 1L through nozzle is got back in the oil tank, fills up liquid level decline space and reaches pressure equilibrium, and the saturated oil gas-liquid that is reclaimed can reduce the further volatilization of gasoline in the storage tank, by the time during RTC unloading, the oil gas that reclaims enters tank wagon, and after oil depot focused on, liquefying was gasoline.

It is that oil gas reclaims the acceptance checkout equipment that improvement project is finished that refuelling station's oil gas reclaims detector, also is the guarantee of the permanently effective operation of gas recovery system for oil.Gas recovery system for oil is checked and accepted needs to detect three indexs such as leakproofness, liquid resistance, gas liquid ratio, the airtight degree of leakproofness reflection gas recovery system for oil under certain process stage, liquid resistance reflection fuel charger is to the resistance situation of oil tank institute pipeline installation to oil gas, and gas liquid ratio reflects oil gas volume that reclaims when refueling and the ratio that adds oil volume synchronously.As the state-owned large-scale scientific research institutions that enter this field the earliest, reclaim context of detection at oil gas and carried out the work that studies for a long period of time, accumulated a large amount of experiences, new concept is constantly proposed, the research and development new product promotes the development of China in this field.

Retrieved the related patent data storehouse according to the technology of the present invention characteristics, do not find that refuelling station's oil gas reclaims detection method, the related invention patent of instrument aspect, it is that my unit applied in January, 2008 (ZL200820004655.6) that the relevant patent in utility model aspect has " oil gas recovery comprehensive detector ", but this patent does not possess data storing, print, transfer function, lack automatically and detect, the Intelligent Measurement function, also not seeing has taking with the technology of the present invention characteristics are closely-related of publishing " flow+pressure fitted method detects three indexs ", the oil gas that possesses functions such as " detecting data store automatically; transmission; print " reclaims detection method and intrinsically safe circuit, the relevant report of the integral intelligent detector that airtight circuit is formed.

Summary of the invention

The purpose of this invention is to provide a kind of high precision, low cost, digital, miniaturization, portable oiling station oil gas that automaticity is high reclaims detection method and equipment.Basic solution refuelling station leakproofness, liquid resistance, three index sequencing of gas liquid ratio, intellectuality, standardization detect problem, greatly reduce the workload of on-the-spot detection record data, disposal data, make refuelling station's testing more transparent, objective, just.

Realize that technical scheme of the present invention is:

A kind of refuelling station's oil gas that is used for reclaims the method that detects, adopt Root's meter (or Roots's flow sensor)+digital pressure gauge (or pressure transducer) to cooperate and detect leakproofness, liquid resistance, gas liquid ratio, detect data and preserve automatically, can or be transferred to computing machine for field print.Be specially:

1, digital pressure gauge (2) is connected the airtight air-channel system of Root's meter (1) back composition, gas enters Root's meter (1) through air intake opening (7.), the moment flow that Root's meter (1) measures and demonstrates by gas (is also referred to as flow velocity, the L/min of unit), integrated flux (is also referred to as flow, the L of unit), digital pressure gauge (2) detects and demonstrates the pressure (pressure unit Pa) by Root's meter (1) back gas in real time, and last gas is through gas outlet (8.).

2, the intrinsically safe circuit system is by power supply (3), Roots's flow sensor (Root's meter) (1), pressure transducer (digital pressure gauge) (2), single chip processing module (4), display screen (5), input keyboard (6), data-carrier store (8) and printer interface (9), data transmission interface compositions such as (9), system's power supply (3) embedding current limliting, safety circuit, single chip processing module (4) is gathered Roots's flow sensor (1) signal, pressure transducer (2) signal is also handled, functions such as demonstration are system's " brains ", display screen (5), input keyboard (6) is finished the testing process human-computer interaction function, data-carrier store (8) can be preserved fuel station information, detect data, printer interface (9) can connect printer and finish the printing function that detects data, can also transfer to computing machine with detecting data by data transmission interface (9).

3, the scheme of refuelling station's leakproofness detection: at air intake opening (7.) needle-valve (variable valve) is installed, gas outlet (8.) connecting line to fuel charger is reserved and is detected mouth, and all connections need airtight.The nitrogen that is filled during detection passes through needle-valve, air intake opening (7.), Roots's flow sensor (1), gas outlet (8.) enters reserved opening under the fuel charger, enter underground petrol tank by the oil gas reclaim line again, underground petrol tank is in air-tight state, along with nitrogen constantly charges into, cause that jar internal pressure increases, oil tank and checkout equipment are in connected state, pressure on the checkout equipment shows when reaching 500Pa, close needle-valve, stop to charge into nitrogen, detect 5 minutes in oil tank pressurize situation, detecting instrument is gathered automatically, force value when preserving 5 minutes, then leakproofness is qualified for surplus pressure value in this value overgauge, and then leakproofness is defective less than the surplus pressure value in the standard.

4, refuelling station's liquid hinders the scheme that detects: at air intake opening (7.) installation needle-valve (variable valve), gas outlet (8.) connecting line to fuel charger is reserved and is detected mouth, and all connect need be airtight.The nitrogen that is filled during detection passes through needle-valve, air intake opening (7.), Roots's flow sensor (1), gas outlet (8.) enters reserved opening under the fuel charger, enter underground petrol tank by the oil gas reclaim line again, underground petrol tank is in the open state that is communicated with atmosphere, metering pin valve makes nitrogen charge into the vapor return line of fuel charger to oil tank with certain flow velocity (L/min), press input keyboard (6), detecting instrument is recorded in the demonstration numerical value of this flow velocity downforce table automatically, this force value is less than the normal pressure value, then show pipeline unimpeded (qualified), this force value overgauge force value, show that then the pipeline return-air freely even does not fully stop up (defective), instrument stores the detection data automatically.

5, nozzle gas liquid ratio detection scheme: (8.) connects hose line in the gas outlet, and the flexible pipe other end connects the nozzle adapter, and adapter and nozzle are used, and all connections all keep airtight.Nozzle refuels during detection, the air-breathing adapter negative pressure that causes of return line, gas at first enters the air intake opening (7.) of instrument, by flow sensor (1), gas outlet (8.), adapter, be inhaled into the return line of oil gun, read integrated flux (L of unit) from instrument by gas, be the inspiratory capacity of nozzle, read volume read-out (L of unit) from fuel charger simultaneously, import by keyboard (6), instrument calculates the ratio of oil gas volume and volume read-out automatically, is the gas liquid ratio of nozzle, and stores automatically.

6, form examining report unified, standard automatically: under the control and coordination of instrument " brain "-single chip processing module (4), the detection data of preserving are taken out from data-carrier store (8), formation comprises fuel station information, leakproofness testing result, liquid resistance testing result, gas liquid ratio testing result, detects the report of information such as time on date, be connected with printer by printer interface (9), can print examining report, be connected with computing machine by this mouth, examining report can be transferred to computing machine, be convenient to standardized management.

Because adopt technique scheme, the present invention has following advantage and effect:

1, compact conformation of the present invention, a machine are finished three indexs in refuelling station and are detected, have high universalizable, volume little easy to carry, reading is directly perceived, characteristics such as simple to operate.

2, the design of Root's meter+digital pressure gauge, leakproofness, liquid resistance, gas liquid ratio high Precision Detection have been realized, the resolution of Root's meter flow velocity, flow reaches 0.01L, the resolution of digital pressure gauge reaches 1Pa, resolution still is that precision all is much higher than requirement in the GB, guarantees that testing result is more reliable.

3, the present invention can detect three indexs according to flow process, testing result writes down automatically, stores, after detection is finished, form examining report unified, standard, need not the liquid resistance, every of the on-the-spot hand-kept fuel station information of testing staff, leakproofness data, each fuel charger the loaded down with trivial details data such as gas liquid ratio of nozzle, significantly reduce the testing amount, save time, the detection error of having avoided human negligence to bring.

4, the present invention can be with the form field print of testing result with report, also examining report can be transferred in the computing machine, field print comes into force after reporting after testing and signing personnel's signature, the responsible official of refuelling station both sides confirm, the examining report after coming into force can't artificially be revised, and has guaranteed its authenticity; The detection data are transferred to computing machine makes management convenient, has saved the time of personnel's inputs, has improved the efficiency of management.

The present invention stops the refuelling station substantially and detects the possibility of playing tricks, and guarantees that refuelling station's oil gas reclaims detect true, just, and then guarantees that refuelling station's gas recovery system for oil normally moves, and saves the energy, and the protection environment is beneficial to health.Social benefit of the present invention, economic benefit are obvious.

Description of drawings

Fig. 1 reclaims intelligent detecting instrument main body air-channel system, circuit system structure synoptic diagram for oil gas

1, Roots's flow sensor (Root's meter) 2, digital pressure sensor (digital pressure gauge)

3, explosion-proof power supply 4, single chip processing module 5, display screen 6, input keyboard

7, equipment box 8, data-carrier store 9, data transmission interface (printer interface)

10, data cable line 11, power supply anddata cable line 12, communication cable line

1. 2. 3. 4. 5. gas circuit bushing of gas circuit pagoda head of gas circuit elbow of gas circuit flexible pipe of data cable line

6. gas circuit to silk 7. gas circuit connect 8. gas circuit threeway soon

Embodiment

As shown in the figure, the invention process comprises: air-channel system is by air intake opening (7.), to silk (6.), elbow, flow sensor (1), threeway (8), elbow (3.), bushing (5.), pagoda joint (4.), flexible pipe (2.), pressure transducer (2) is formed, Circuits System is by flow sensor (1), pressure transducer (2), power supply (3), single chip processing module (4), display screen (5), input keyboard (6), data-carrier store (8), printer interface (9) and stube cable are (1., 10,11,12) form, air-channel system and Circuits System are integrated to be installed in the equipment box (7).

As figure, each device connection is described below:

1, air intake opening (7.), air-channel system that silk (6.), elbow, flow sensor (1), threeway (8), elbow (3.), bushing (5.), pagoda joint (4.), flexible pipe (2.), pressure transducer (2) are formed, its pipe fitting joint uses fluid sealant, to guarantee that gas does not have leakage under the pressure of 5000Pa.

2, flow sensor (1) metering is by the flow velocity and the flow of gas, and with the form output of pulse, single chip processing module (4) receives pulse signal, calculates gas flow rate and flow, is presented on the screen.

3, pressure transducer (2) measures the gas circuit internal pressure, and pressure signal is transferred to single chip processing module (4), is presented on the screen after treatment.

4, power supply (3) embedding current-limiting protection circuit, the output energy is limited, played explosion-proof, is connected with single chip processing module (4), power for the entire circuit system.

5, display screen (5) is an alternating interface between man and computer, shows the testing process of leakproofness, liquid resistance, three indexs of gas liquid ratio, shows numerical value such as flow velocity, flow, pressure, and information such as testing result.Be connected with single chip processing module (4).

6, input keyboard (6) is connected with single chip processing module (4), is the instrument of selecting, operate, importing.

7, data-carrier store (8) and single chip processing module communication are to detect data storage cell, adopt ferroelectric memory, even outage, data are not lost, long preservation.

8, printer interface (9) also is a data transmission interface, is connected with single chip processing module by cable, is connected with printer, printablely goes out examining report, is connected with computing machine and can detects data transmission to computing machine.

Refuelling station's oil gas reclaims to detect and mainly may further comprise the steps:

1, input refuelling station essential information is imported information such as refuelling station's numbering, fuel charger number, nozzle number, refuelling station's ullage, leakproofness detection least residue force value by input keyboard (6) and display screen (5).

2, detect leakproofness, ground oil tank fuel charger farthest buries in the chosen distance refuelling station, carries out leakproofness and detects, and at air intake opening (7.) needle-valve (variable valve) is installed, and gas outlet (8.) connecting line to fuel charger is reserved and detected mouthful, all connect need airtight.The nitrogen that is filled during detection passes through needle-valve, air intake opening (7.), Roots's flow sensor (1), gas outlet (8.) enters reserved opening under the fuel charger, enter underground petrol tank by the oil gas reclaim line again, underground petrol tank is in air-tight state, along with nitrogen constantly charges into, cause that jar internal pressure increases, oil tank and checkout equipment are in connected state, pressure on the checkout equipment shows when reaching 500Pa, close needle-valve, stop to charge into nitrogen, detect 5 minutes in oil tank pressurize situation, detecting instrument is gathered automatically, force value when preserving 5 minutes, then leakproofness is qualified for surplus pressure value in this value overgauge, and then leakproofness is defective less than the surplus pressure value in the standard.

3, detect fuel charger liquid and hinder, each gasoline fuel charger is all detected not good liquor resistance, at air intake opening (7.) installation needle-valve (variable valve), gas outlet (8.) connecting line to fuel charger is reserved and is detected mouth, and all connect need be airtight.The nitrogen that is filled during detection passes through needle-valve, air intake opening (7.), Roots's flow sensor (1), gas outlet (8.) enters reserved opening under the fuel charger, enter underground petrol tank by the oil gas reclaim line again, underground petrol tank is in the open state that is communicated with atmosphere, metering pin valve makes nitrogen charge into the vapor return line of fuel charger to oil tank with certain flow velocity (L/min), press input keyboard (6), detecting instrument is recorded in the demonstration numerical value of this flow velocity downforce table automatically, this force value is less than the normal pressure value, then show pipeline unimpeded (qualified), this force value overgauge force value, show that then the pipeline return-air freely even does not fully stop up (defective), instrument stores the detection data automatically.

4, detect the nozzle gas liquid ratio, to every the high speed of nozzle, low or first gear are all detected gas liquid ratio one time, (8.) connects hose line in the gas outlet, and the flexible pipe other end connects the nozzle adapter, and adapter and nozzle are used, and all connections all keep airtight.Nozzle refuels during detection, the air-breathing adapter negative pressure that causes of return line, gas at first enters the air intake opening (7.) of instrument, by flow sensor (1), gas outlet (8.), adapter, be inhaled into the return line of oil gun, read integrated flux (L of unit) from instrument by gas, be the inspiratory capacity of nozzle, read volume read-out (L of unit) from fuel charger simultaneously, import by keyboard (6), instrument calculates the ratio of oil gas volume and volume read-out automatically, is the gas liquid ratio of nozzle, and stores automatically.

5, print examining report, detection is placed on equipment safety zones such as refuelling station's Central Control Room after finishing, and switches on to printer, and link to each other with the printing interface of instrument, selective printing prints examining report, testing staff's signature, after the responsible official of the refuelling station signature, examining report comes into force.

Claims (6)

1. the detection method and the instrument that are used for refuelling station's gas recovery system for oil, mainly form by oil gas recovery detection method and intelligent detecting instrument, wherein detection method comprises refuelling station's gas recovery system for oil leakproofness, the liquid resistance, three indexs of gas liquid ratio are according to the sequencing of sequencing, adopt flow+pressure fitted method to detect, detecting data preserves automatically, can or be transferred to computing machine for field print, intelligent detecting instrument comprises power supply, Roots's flow sensor, digital pressure sensor, display screen, input keyboard, single chip processing module, data-carrier store and printer interface, the intrinsically safe circuit system that data transmission interface etc. are formed, and flow sensor, pressure transducer, pipe fitting, flexible pipe, the airtight air-channel system that rapid-acting coupling is formed, Circuits System, air-channel system cooperates panel to form unified integral installation in casing.

2. oil gas according to claim 1 reclaims intelligent detection method and detector, it is characterized in that adopting flow+pressure fitted method to detect, pressure transducer (digital pressure gauge) is installed in flow sensor (electronic type Root's meter) position, gas outlet, be installed in simultaneously in the pipeline, finish the detection of refuelling station's leakproofness, liquid resistance, three indexs of gas liquid ratio.

3. reclaim the air-channel system of intelligent detection method and detector according to claim 1,2 described oil gas, it is characterized in that comprising in the oil gas reclaim line air intake opening, flow sensor (electronic type Root's meter), tee pipe fitting, gas circuit flexible pipe, pressure transducer (digital pressure gauge), gas outlet, the pipeline junction takes the leakproofness measure to handle, and air-channel system does not have leakage under certain pressure.

4. oil gas according to claim 1 reclaims intelligent detection method and detector, it is characterized in that having the detection data and preserves automatically, can supply field print or the data transmission function to computing machine.The scene need not testing staff's hand-kept fuel station information, leakproofness detects lot of data such as data, liquid resistance detection data, gas liquid ratio detection data, the automatic recording detection data of instrument, can print examining report at the scene, report came into force after testing staff, the personnel of refuelling station signed.Except automatic generation is unified, the examining report of standard, can also will detect data transmission to computing machine, centralized management.

5. reclaim the Circuits System of intelligent detection method and detector according to claim 1,4 described oil gas, it is characterized in that comprising in the oil gas recovery circuit power supply, Roots's flow sensor, digital pressure sensor, display screen, input keyboard, single chip processing module, data-carrier store and printer interface, data transmission interface etc., show pressure transducer during high-precision real, the Circuits System employing obtains the explosion-proof design of little power consumption this case of national explosion-proof certificate of certification.

According to claim 1,2,3,4,5 described oil gas reclaim intelligent detection method and detector has portability, it is characterized in that intrinsically safe circuit system, airtight air-channel system cooperate panel to form unified integral installation in instrument box, instrument box has handle, return pulley, equipment set hauls away as luggage truck, and is promptly lightly laborsaving again.

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