RU2495768C2 - Sale process of oil products to consumer - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention is referred to field of the engineering providing sale of oil products to the consumer. Sale of oil products to the consumer is made taking into account actual temperature of oil product. An oil product dose at temperature +20°C inflect to volume at actual temperature by means of definition of medium temperature of oil product in buried reservoirs of a gasoline station on a season and alterations of volume of the gauging camera of fuel-dispensing unit by a controller of the block of measurements. Temperature measuring of oil product is made in the buried reservoir of a gasoline station by means of the temperature sensor. The received value of temperature in the form of current signal is automatically given on the controller which will convert the received signal in operating therefore the volume of a sold dose of oil product is changed. Sale of oil products to the consumer with the identical power and mass maintenance in a unit of volume at different temperature is provided.

EFFECT: sale of oil products to the consumer with the identical power and mass maintenance in a unit of volume at different temperature is provided.

2 cl, 3 dwg

Description

The invention relates to measuring equipment, and in particular to the field of measuring the flow rate of fluids (oil products), and is intended for dosing their volume with adjustment and regulation, thereby ensuring accurate dispensing of oil products to the consumer.

Background to the invention.

Analysis of the current level of technology in this field showed the following. Currently, the supply of petroleum products (diesel fuel, gasoline, fuels and lubricants) to the consumer, as well as all issues related to the accounting of petroleum products, are regulated by the “Instruction on the procedure for receipt, storage, dispensing and metering of oil and petroleum products at oil depots, bulk points and gas stations of the Goskomnefteprodukt system of the USSR ”, approved on August 15, 1985, No. 06 / 21-8-446. In accordance with the requirements of this Instruction with amendments and additions (letter No. 04-21 / 760 dated 11/30/1987), oil products are recorded at oil depots and filling stations in mass units, and oil products are sold and registered at gas stations (gas stations). in volume units (liters).

Oil product is sold to consumers at gas stations through fuel dispensers (fuel dispensers) in volume units (liters) at the current (actual) temperature at any time of the year. Accordingly, the price of petroleum products is set in rubles per liter, regardless of the actual temperature, and the measuring device of the fuel dispenser is always set to dispense volume at a temperature of t = + 20 ° C according to MI 1864-88 “Fuel-dispensing columns. Verification Technique. ”

However, the volume of oil is directly dependent on its temperature. Each degree of temperature change leads to a change in gasoline volume by 0.11%, and diesel fuel by 0.08%. If the volume of gasoline, expressed in unit mass, at a temperature of t = + 20 ° С is taken as 100%, then at t = + 10 ° С its volume will decrease by 1.1%, at t = 0 ° С - by 2.2 % etc. This means that the energy and mass content in a unit volume of gas dispensed through a fuel dispenser at t = + 20 ° C is 2.2% less than the energy and mass content in the same volume unit dispensed through a fuel dispenser at t = 0 ° FROM.

In other words, at the same price per liter of gasoline throughout the year, the fuel dispenser gives the same volume, tuned to a temperature of t = + 20 ° C, but constantly of different energy and mass contents, resulting in a car on the same volume of gasoline travels different distances. In addition, studies have shown that the temperature of oil products in gas station containers is 10 ÷ 16 ° С lower than t = + 20 ° C, as a result of which the seller of the goods constantly loses up to 1.5% of oil products from the volume of sales through fuel dispensers.

Known schematic diagrams of devices for refueling cars with fuel and oils (Dmitriev I.A. Equipment of gas stations, M., Nedra, 1968, p.5-9, 34-52), where on page 7 gives information about the errors of the fuel dispenser with fuel temperature fluctuations exceeding ± 5 ° С, at which measurements in units of volume cause errors that go beyond the permissible limits (0.5%).

The accuracy of the fuel dispenser consists of the following terms (see pages 37-38):

δ - errors caused by the presence of fluid leakage through the gaps of the volumetric meter;

δ CR - errors associated with a variable mode of operation of the meter when turning on and off the fluid supply;

δ cm - errors when reading the counting mechanism;

δ cs - errors of the kinematic circuit of the counter.

And then the last paragraph on page 38.

During the measurement process, there may be other errors in the meter readings, which are caused by the conditions in which the measurement takes place. These include:

a) changes in the temperature of the liquid meter (housing), which affects the volume in the measuring chamber due to linear expansion of the metal;

b) the temperature difference of the liquid in the measuring chamber and after it has left the meter;

c) the error of the meter reading caused by the presence in the measured liquid of gases and vapors of the oil product.

As a result of the analysis of well-known schemes of devices for refueling cars with fuel and oils, it should be noted that in modern fuel dispensers and existing methods for checking and adjusting fuel dispensers, almost all errors are eliminated or minimized by electronic devices, except (8) errors caused by liquid leaks through the gaps of the volumetric meter, and therefore the passport error of imported fuel dispensers is not more than 0.25%, and domestic dispensers - 0.5%.

For the proposed technical solution, the above errors do not matter. The technical solution claims that the existing adjustment of the measuring chamber of the fuel dispenser for the temperature t = + 20 ° С according to MI 1864-88 leads to the loss of 1.5% of the oil product from the volume of tempering on average over the year, because the oil product that is dispensed through the fuel dispenser has a different temperature, much lower than indicated, which means that the fuel dispenser gives the consumer the same physical volume throughout the year, but always of different energy and mass content due to the properties of the oil product (gasoline volume expansion coefficient 0.11% with temperature change 1 ° C).

Closest to the proposed method is the method we chose as a prototype for measuring the mass of oil in fuel dispensers with dispensers (Patent EA 23005800840, G01F 1/86, 12/29/2006), including measuring the density, volume, temperature of the oil, followed by by calculating its mass according to the formula, and the density of the oil product is measured at the temperature of the line by means of a density meter installed at the outlet of the dispensing tank, then the measured density is recalculated, determined I have a standard density value at a temperature t = + 20 ° C, at the same time, in each fuel dispenser, temperature sensors measure the temperature of oil product tempering, according to which calculation tables and a standard density value of oil product are measured at a temperature t = + 20 ° С at a temperature directly in each fuel dispenser, while the volume is measured by a volumetric meter that has undergone selective selection and has a limit of permissible basic relative decisions when changing the volume of 0.08-0.15%, and the calculation of the mass of the oil product for each fuel dispenser depending on the temperature is carried out according to the formula Mnfp = Vnfp · Rknfp (t), where Mnfp is the mass of the oil product, Vnfp is the volume of the oil product, Rknfp ( t) is the density of the oil product depending on the temperature in each column, and during the selective selection of volumetric meters, a batch of volumetric meters is made, each of which is subjected to an error test, then, taking into account the general error range from 0.08-0.25%, group PU volumetric meters with an error of 0.08-0.15%. (For information: Vnfp - the volume of oil in the above formula is taken according to the fuel dispenser, the volume meter of which is configured to measure volume at a temperature of t = + 20 ° C according to MI 1864-88).

The difference between this method and the claimed invention is that the accuracy of measuring the mass of the oil product in the processes of receiving and dispensing from ground tanks of oil depots and liquid filling stations is increased only by taking into account the density of the oil product in each loading column.

And according to our proposed method, it is ensured that petroleum products are sold to consumers through fuel dispensers in volume units, in which the volume depends on its actual temperature and volume expansion coefficient of this type of oil product (physical temperature coefficient) located in a tank buried in the ground.

The technical result, the achievement of which the claimed invention is directed, is to ensure the accuracy of dispensing a volumetric dose of fuels and lubricants through fuel dispensers, i.e. the same energy and mass content at different temperatures.

The technical result is achieved by the fact that according to the method of selling petroleum products to the consumer, by which petroleum products are dispensed in units of volume (in liters), it is new that tempering is carried out taking into account the actual temperature of the petroleum product, and the dose of the petroleum product at a temperature of + 20 ° C is changed to volume at the actual temperature by determining the average temperature of the oil in the buried tanks of the gas station and changing the volume of the measuring chamber of the fuel dispenser by the block regulator from Eren.

The temperature of the oil product in the recessed capacity of a gas station is measured using a temperature sensor, the temperature value obtained is automatically sent to the controller as a current signal, which converts the received signal to a control signal, in accordance with which the volume dispensed through the fuel dispenser changes at a known temperature and volume expansion coefficient doses of oil.

According to the claimed method of selling petroleum products, in which petroleum products are dispensed to the consumer in units of volume, it is new that the petroleum product is dispensed taking into account its temperature by adjusting the volume of the measuring chamber of the fuel dispenser. The dose of oil at a temperature of t = + 20 ° C is changed to volume at its actual temperature.

When conducting patent research, no solutions were found that are identical to the declared one, therefore, the claimed invention meets the criterion of "novelty."

The essence of the claimed invention does not follow explicitly from the known solutions, therefore, the claimed invention meets the criterion of "inventive step"

We believe that the information set forth in the application materials is sufficient for the practical implementation of the invention.

The proposed method for the sale of petroleum products to the consumer is illustrated by drawings.

Figure 1 shows a graph of the temperature of the oil in the underground (buried in the ground) reservoirs of gas stations during the year on the territory of the Republic of Tatarstan.

Figure 2 shows the measuring unit of the dispenser with a volume control of the measuring chambers.

Figure 3 shows a block diagram of dose adjustment depending on the temperature in the buried tank of the gas station.

In figure 1, the number 1 indicates the actual temperature of the oil product; number 2 - the standard temperature of the oil product + 20 ° С, to which all fuel dispensers are configured according to MI 1864-88.

Figure 2 presents the controller 1 of the measuring chamber, which changes the volume of the fuel dispenser.

Figure 3 - fuel dispenser 1, controller 2 and a recessed tank 3.

To describe the method, we first turn to Figure 1.

As can be seen from the graph, the actual temperature of oil 1 throughout the year is significantly lower than the temperature t = + 20 ° C, adopted in the Russian Federation as standard 2, to which all domestic and imported fuel dispensers (fuel dispensers) produced for industrial operation are configured.

To implement the method, the following is used.

Option 1. Based on statistical data on soil temperature at the depths of the reservoirs, which are provided by the regional departments of hydrometeorology and environmental monitoring for several years of observations, the average temperature of the oil product in the reservoir buried in the ground is determined by the seasons (month, quarter, half year). In accordance with the established average temperature and the coefficient of volume expansion of the oil product, the regulator 1 of the measurement unit (Fig. 2) changes (increases or decreases) the volume of the measuring chamber, thereby changing the dose of oil produced by the fuel dispenser to the consumer.

Option 2. The temperature of the oil is measured in the buried tank 3 (Fig. 3) using a temperature sensor and the obtained temperature value is automatically supplied as a current signal to controller 2. Controller 2 converts the received signal into a control one, according to which, at a known temperature and coefficient volume expansion of this type of oil product changes the volume of the dispensed dose of oil through the fuel dispenser 1.

Thus, the proposed method for the sale of petroleum products to the consumer through the fuel dispenser makes it possible to ensure constant compliance with the dose delivered through the dispenser at the actual temperature to the energy and mass content of the dose of oil at t = + 20 ° С

The ongoing experimental and research work at gas stations with the participation of employees of the Federal state-owned enterprises of Rostekhregulirovanie of the Republic of Tatarstan on the introduction of this method of selling petroleum products show that the loss of petroleum products is reduced by an average of 1.5%. The tax base of petroleum product supply enterprises will increase at a faster pace, since net income will not be lost for all expenses already incurred for the acquisition, storage and transportation of petroleum products to gas stations. For regions of Russia, where the average annual temperatures differ even more from the standard t = + 20 ° С, the effect will be higher.

Calculations show that, with an average annual sales of light petroleum products on the domestic market of Russia of approximately 73 million tons, the actual loss of oil products is more than one million tons.

Thus, the proposed method for the sale of petroleum products to the consumer is a highly effective measure for the sale of petroleum products and can, with widespread implementation, bring a significant economic effect.

Claims (2)

1. A method of selling petroleum products to a consumer, according to which petroleum products are dispensed in units of volume, characterized in that the petroleum product is manufactured taking into account the actual temperature of the petroleum product, and the dose of the petroleum product at a temperature of + 20 ° C is changed to volume at the actual temperature by determining the average temperature of the petroleum product in buried tanks by the time of the year, in accordance with the average temperature set by the regulator of the measurement unit, the volume of the dispensed oil dispensing column is changed product. 2. The method according to claim 1, characterized in that the temperature of the oil is measured in the buried tank of the gas station using a temperature sensor, the obtained temperature value in the form of a current signal is automatically fed to the controller, which converts the received signal to a control one, according to which the temperature and volume expansion coefficient, the volume of the dose of oil discharged through the fuel dispenser changes.

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