CN111912501A - Method for calibrating and distributing points of ground tank of gas station - Google Patents
Method for calibrating and distributing points of ground tank of gas station Download PDFInfo
- Publication number
- CN111912501A CN111912501A CN202010828563.5A CN202010828563A CN111912501A CN 111912501 A CN111912501 A CN 111912501A CN 202010828563 A CN202010828563 A CN 202010828563A CN 111912501 A CN111912501 A CN 111912501A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 239000000047 product Substances 0.000 claims abstract description 14
- 239000013589 supplement Substances 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000002347 injection Methods 0.000 abstract description 7
- 239000007924 injection Substances 0.000 abstract description 7
- 230000001502 supplementing effect Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 2
- 241000588807 Bordetella Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/0084—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume for measuring volume
Abstract
The invention relates to the technical field of oil product metering, in particular to a calibration method of an oil tank. 1) Recording the height of bottom oil of the ground tank to be calibrated, the oil temperature and the inner diameter of the oil tank; 2) injecting oil into a standard measuring device (checking whether oil leakage or air leakage exists in a pipeline during oil injection) 3) closing an oil pump, waiting for 2 minutes, opening an oil supplement valve of the standard measuring device after oil injection, supplementing oil into the standard measuring device, and closing the oil supplement valve when oil flows in an oil overflow observation pipe, and recording the specification of the standard measuring device, the oil temperature in the measuring device and the ambient temperature; 4) and after the liquid levels in the left and right ground tanks are stable, recording the liquid level meter and measuring the liquid level and the oil temperature of the oil product in the tanks. And repeating the working cycle until the oil level in the ground tank reaches 90% of the inner diameter of the tank, and finishing calibration of the ground tank. The technical scheme adopted by the invention can effectively improve the accuracy of the tank capacity, reduce the comprehensive error rate, reduce disputes and reduce loss; increase economic benefits and reduce the labor intensity of workers.
Description
Technical Field
The invention relates to the technical field of oil product metering, in particular to a calibration method of an oil tank.
Background
The national measurement regulations stipulate: in order to more accurately reflect the profit and loss of oil products of the oil station, the volume of a horizontal tank of the oil station is required to be calibrated once every four years at most, and the comprehensive error of the volume of the horizontal tank needs to be controlled within 3 per thousand. The volume data displayed by the liquid level meter depends on whether the volume table of the lying tank is accurate or not. The accurate volume meter is the basis of oil product management, the horizontal tank volume calibration links are omitted, the problems of oil product profit and loss, false loss, handover dispute and the like can be directly faced when the error of the volume meter is too large, and the horizontal tank volume of the metal standard container is utilized for on-site calibration aiming at the problems.
The prior art adopts a volume comparison method: the standard measuring device is combined with a liquid level meter and the flow meter is combined with the liquid level meter, oil is filled into the tank, data is recorded, and a volume meter is manufactured through calculation processing software. During the calibration process, a number of difficulties are encountered, which are as follows:
(1) the Bordetella liquid level meter of the gas station has slow signal transmission and large error, and the measurement precision can not meet the requirement;
(2) in the installation process, the liquid level instrument probe is not firmly installed, and errors can be generated in the measurement of the liquid level instrument;
(3) the problems of not forming a uniform management method, forced posting, offline of a liquid level instrument, manual oil collection, offline oil filling and the like still exist;
(4) the volumetric meter introduces a certain error in centimeters.
The following disadvantages mainly exist:
1) the charge is high. The calibration cost of 30 cubic horizontal tanks is 2500 yuan/one, and 50 cubic horizontal tanks are 3500 yuan/one.
2) The time is slow. The standard measuring device oiling method is used for calibrating a 30-cubic horizontal tank for 3 hours, and the flow meter oiling method is used for calibrating the 30-cubic horizontal tank for one and a half hours (the precision is far lower than that of the standard measuring device method). The two oil injection methods are difficult to solve the problem of synchronization of calibration time and precision, the standard measuring device method is slow but high in precision, and the flow meter oil injection method is fast but low in precision.
3) It is inconvenient. Both the oil injection methods depend on the matching of an oil tank truck, and have higher requirement on the blending concentration of the finished oil. If the filling station is far away from the oil depot or the tank trucks with different oil qualities are not synchronously delivered to the filling station, the two filling methods are not suitable.
4) The equipment is heavy in weight and large in volume, a pick-up truck or a van needs to be specially arranged for transportation, and a large amount of labor cost is increased.
5) The precision can meet the precision requirement only by correcting for many times.
Disclosure of Invention
In order to solve the problems, the tank capacity precision is improved, the comprehensive error rate is reduced, disputes are reduced, and the loss is reduced; economic benefits are increased, and labor intensity is reduced; and (5) tamping the foundation. The invention adopts the following technical scheme:
1) recording the height of bottom oil of the ground tank to be calibrated, the oil temperature and the inner diameter of the oil tank;
2) closing an oil discharge valve of the standard measuring device, opening an oil inlet valve of the standard measuring device, starting an oil pump, injecting oil into the standard measuring device (checking whether oil leakage and air leakage exist in a pipeline during oil injection), rapidly stopping the pump when an oil overflow observation pipe of the standard measuring device overflows with oil, and then closing the oil inlet valve, wherein the oil pump is closed firstly and then the valve is closed in the process;
3) after an oil pump is closed, an oil supplementing valve of the standard measuring device which is filled with oil is opened, when oil is supplemented into the standard measuring device and oil flows in an oil overflow observation pipe, the oil supplementing valve is closed, and the specification of the standard measuring device, the oil temperature in the measuring device and the ambient temperature are recorded;
4) opening an oil drain valve, filling oil into the ground tank to be calibrated, simultaneously observing whether an oil drain pipeline leaks or not, and closing the valve after oil drain is finished;
5) and after the liquid levels in the left and right ground tanks are stable, recording the liquid level meter and measuring the liquid level and the oil temperature of the oil product in the tanks. (the average value of three times of manual scale detection is used as the liquid level height, and the difference between the maximum value and the minimum value of the three times of scale detection is not more than 1 mm).
6) And 2, step 5 is a working cycle, and the working cycle is repeated until the oil level in the ground tank reaches 90% of the inner diameter of the tank, so that the calibration of the ground tank is finished.
7) During calibration, the oil in the spill tank will increase (as can be observed from the spill tank's sight tube) and should be placed into the empty gauge through the spill tank drain valve from time to time.
Preferably, in step 5, the manual scale is used for measuring three times simultaneously, the average value is taken as the liquid level height, and the difference between the maximum value and the minimum value is not more than 1mm.
Further, after the data acquisition is completed in the steps 1 to 7, a volume table is generated by using horizontal metal tank volume calculation software and is introduced into the liquid level meter.
Furthermore, the horizontal metal can capacity calculation software is horizontal metal can capacity calculation software.
Furthermore, in the calibration process, after the oil product with the calibration point is injected into the ground tank every time, the measurement and the counting are carried out once.
The technical scheme adopted by the invention has the following beneficial effects: and after the test point work is finished, the average comprehensive error rate of the storage tanks of the gas stations belonging to the Haidongson division is 0.1%. After the pilot work is successful, the company guides each secondary unit to be popularized in the whole province. Through repeated evidence finding, nearly 1198 ground jars are made in the whole province, the comprehensive loss rate of the whole company is controlled within 0.1%, and the economic benefit is improved by nearly 1.2 hundred million yuan.
Detailed Description
The technical solution of the present invention is further explained with reference to the specific embodiments.
Example 1:
(1) preparation and coordination before calibration
1) And the information related to the calibrated oil tank is known, and comprises the volume of the calibrated oil tank, the name and the specification of the contained oil product, the condition of the accessory of the oil tank and the condition of the process flow of the calibrated unit.
2) The calibration vehicle is parked at a position which is convenient to operate, safe and reliable, and a police safety line is arranged.
3) Calibrating the adjustment level of the vehicle, and placing a 35kg handcart type dry powder fire extinguisher and 2 fire blankets; a fire blanket and an oil absorption felt are also arranged on the tank car. An explosion-proof oil suction pump distribution box (the distribution box is 10M away from the oil tank, the oil suction pump and the calibration vehicle) is arranged, and is connected with an electrostatic grounding wire (parallel connection), an oil conveying pipeline, a thermometer and an anti-slip pier arranged on wheels to release human body static electricity.
4) Confirm whether safe effective of antistatic unit, fire prevention equipment etc. whether it is reasonable to place, whether defeated oil pipe line connection is correct that calibration car, oil pump distribution etc..
5) After all the above-mentioned items are confirmed to be error-free, the power supply is switched on, and the rotation direction of oil pump is debugged.
6) And confirming that the number of the ground tank to be calibrated is consistent with that of the oil product for calibration.
7) It was confirmed that the height of the oil level of the tank to be calibrated had to be 70mm or less.
(2) Calibration
1) And recording the height of the bottom oil of the ground tank to be calibrated, the oil temperature and the inner diameter of the oil tank.
2) Close standard measuring ware fuel outlet valve, open standard measuring ware inlet valve, start the oil pump, with in the standard measuring ware of oil injection (check pipeline has oil leakage, gas leakage during the oiling), should stop the pump rapidly when the oil spilling observation pipe of standard measuring ware has oil to spill over, then close the inlet valve (annotate: the oil pump must be closed first, and then the valve is closed, and can not be inverted).
3) And (3) after the oil pump is closed, waiting for 2 minutes, opening an oil supplement valve of the standard measuring device which is filled with oil, supplementing oil into the measuring device (gas possibly overflows when the measuring device is kept still for about 2 minutes), and closing the oil supplement valve when oil flows in the oil spilling observation pipe. And recording the specification of the standard measuring device, the oil temperature in the measuring device and the ambient temperature.
4) And opening the oil drain valve, filling oil into the ground tank to be calibrated, and simultaneously observing whether the oil drain pipeline leaks or not. And after the oil drainage is finished, waiting for 2 minutes, and closing the valve.
5) And recording the liquid level meter and measuring the liquid level and the oil temperature of the oil product in the tank after the liquid level in the tank is stable for about 10 minutes. (the average value of three times of manual scale detection is used as the liquid level height, and the difference between the maximum value and the minimum value of the three times of scale detection is not more than 1 mm).
6) The above process is a work cycle. Repeating the above process until the oil level in the ground tank reaches 90% of the inner diameter of the tank, and completing calibration of the ground tank.
7) During calibration, the oil in the spill tank will increase (as can be observed from the spill tank's sight tube) and should be placed into the empty gauge through the spill tank drain valve from time to time.
Furthermore, in order to improve the precision of the calibration result, in the calibration process, the measurement and the measurement are carried out once after the oil product with the calibration point number is injected into the ground tank. (the number of the standard points of the ground tanks with different specifications is shown in the table 1.)
(3) Folding vehicle
1) And the vehicle needs to be collected when the calibration of the ground tank is finished or the calibration is not carried out any more due to time and other reasons.
2) Before the vehicle is taken away, the valves of the standard measuring device and the overflow tank are opened completely, and residual oil in the standard measuring device and the overflow tank and in the pipeline is discharged into the ground tank.
3) The power line is firstly removed, then the oil pump pipeline (gasoline removal oil gas recovery pipeline) is disassembled, and finally the grounding wire, the alarm, the warning wire and the cleaning site are disassembled to guide the calibrated vehicle to leave the station.
In conclusion, the technical scheme provided by the invention can improve the tank capacity accuracy, reduce the comprehensive error rate, reduce disputes and reduce loss; increase economic benefit and reduce labor intensity.
Claims (5)
1. A method for calibrating and distributing points of a gas station ground tank comprises the following steps:
1) recording the height of bottom oil of the ground tank to be calibrated, the oil temperature and the inner diameter of the oil tank;
2) closing an oil discharge valve of the standard measuring device, opening an oil inlet valve of the standard measuring device, starting an oil pump, injecting oil into the standard measuring device, stopping the pump quickly when oil overflows from an oil overflow observation pipe of the standard measuring device, then closing the oil inlet valve, and in the process, firstly closing the oil pump and then closing the valve;
3) closing the oil pump, opening an oil supplement valve of the standard measuring device which is filled with oil, closing the oil supplement valve when oil is supplemented into the standard measuring device and oil flows in an oil overflow observation pipe, and recording the specification of the standard measuring device, the oil temperature in the measuring device and the ambient temperature;
4) opening an oil drain valve, filling oil into the ground tank to be calibrated, simultaneously observing whether an oil drain pipeline leaks, and closing the valve after oil drain is finished;
5) after the liquid level in the left and right ground tanks is stable, recording a liquid level meter and measuring the liquid level and the oil temperature of the oil product in the tanks;
6) step 2-step 5 is a work cycle, the work cycle is repeated until the oil level in the ground tank reaches 90% of the inner diameter of the tank, and the ground tank is calibrated;
7) during calibration, the oil in the spill tank will increase and should be placed into the empty standard gauge through the spill valve of the spill tank from time to time.
2. The method for calibrating and distributing points of the ground tank of the gas station as claimed in claim 1, wherein: and in the step 5, measuring three times by using a manual scale at the same time, taking an average value as the liquid level height, and ensuring that the difference between the maximum value and the minimum value is not more than 1mm.
3. The method for calibrating and distributing points of the ground tank of the gas station as claimed in claim 1, wherein: and (4) after the data acquisition is finished in the steps 1-7, generating a volume table by using horizontal metal tank capacity calculation software and introducing the volume table into a liquid level meter.
4. The method for calibrating and distributing points of the ground tank of the gas station as claimed in claim 1, wherein: the horizontal metal can capacity calculation software is 'horizontal metal can capacity calculation software'.
5. The method for calibrating and distributing points of the ground tank of the gas station as claimed in claim 1, wherein: in the calibration process, after oil products with the calibration points are injected into the ground tank every time, the measurement and the taking of the number are carried out once.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010828563.5A CN111912501A (en) | 2020-08-18 | 2020-08-18 | Method for calibrating and distributing points of ground tank of gas station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010828563.5A CN111912501A (en) | 2020-08-18 | 2020-08-18 | Method for calibrating and distributing points of ground tank of gas station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111912501A true CN111912501A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010828563.5A Pending CN111912501A (en) | 2020-08-18 | 2020-08-18 | Method for calibrating and distributing points of ground tank of gas station |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1127414A (en) * | 1981-11-30 | 1982-07-13 | Glen E. Hansen | Meter proving method |
| CN102564536A (en) * | 2012-02-03 | 2012-07-11 | 中国石油化工股份有限公司 | Correction system and correction method for oil tank loading table |
| CN103267559A (en) * | 2013-05-16 | 2013-08-28 | 中国计量学院 | Automatic volume verification method and device for oil tank truck |
| CN105784076A (en) * | 2016-03-02 | 2016-07-20 | 广州能源检测研究院 | Meter-in and meter-out dual calibration device and method for calibrating volume of horizontal metal tank |
| CN108572022A (en) * | 2017-03-09 | 2018-09-25 | 徐晗 | It does not stop doing business and marks can system and using its mark tank method |
-
2020
- 2020-08-18 CN CN202010828563.5A patent/CN111912501A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1127414A (en) * | 1981-11-30 | 1982-07-13 | Glen E. Hansen | Meter proving method |
| CN102564536A (en) * | 2012-02-03 | 2012-07-11 | 中国石油化工股份有限公司 | Correction system and correction method for oil tank loading table |
| CN103267559A (en) * | 2013-05-16 | 2013-08-28 | 中国计量学院 | Automatic volume verification method and device for oil tank truck |
| CN105784076A (en) * | 2016-03-02 | 2016-07-20 | 广州能源检测研究院 | Meter-in and meter-out dual calibration device and method for calibrating volume of horizontal metal tank |
| CN108572022A (en) * | 2017-03-09 | 2018-09-25 | 徐晗 | It does not stop doing business and marks can system and using its mark tank method |
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Application publication date: 20201110 |
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