JP2017077921A - Oil feed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an error between a calculated value of an amount of fuel oil recovered from fuel oil vapor and the amount of actual recovery in an oil feed device.SOLUTION: An oil feed device 1 includes: an oil feed system; and a vapor liquefaction recovery system which has a vapor return pipe which has one end opened in the vicinity of an oil feed nozzle, a compression pipe, a condenser 23a, and a gas liquid separation measurement tank 23b which are interposed in the vapor return pipe, and adsorption towers which adsorb fuel oil vapor from the gas liquid separation measurement tank. The gas liquid separation measurement tank includes: a fuel oil return valve 25 for returning fuel oil to the oil feed system; a fuel oil upper limit sensor 47d; and a fuel oil lower limit sensor 47e which is provided on a lower side of the fuel oil upper limit sensor and is provided at the same position as the fuel oil return valve or on an upper side of the fuel oil return valve. The fuel oil return valve becomes fully opened upon receiving a detection signal when the fuel oil upper limit sensor detects that the fuel oil has reached an upper limit level, and becomes fully closed upon receiving a detection signal when the fuel oil lower limit sensor detects that the fuel oil has reached a lower limit level.SELECTED DRAWING: Figure 3

Description

  TECHNICAL FIELD The present invention relates to a fueling device, and more particularly, a fueling device provided with a vapor liquefaction recovery system that is installed in a fueling station that supplies fuel oil to an automobile or the like and collects fuel oil vapor that flows out from a fuel tank of the automobile or the like About.

  2. Description of the Related Art Conventionally, in a fuel supply apparatus that supplies highly volatile fuel oil such as gasoline to a fuel tank of an automobile or the like, fuel oil vapor corresponding to the amount of fuel supplied flows out of the fuel tank. When this fuel oil vapor is released into the atmosphere, not only resources are wasted, but there is also a risk of fire and environmental pollution due to ignition.

  Therefore, the present applicant has proposed an oil supply apparatus having a vapor liquefaction recovery system in Patent Document 1. As shown in FIG. 6, the vapor liquefaction recovery system 61 includes a vapor return pipe 62 having one end opened near the oil supply nozzle, a compression pump 63 interposed in the vapor return pipe 62, a condenser 64, and a gas-liquid separation. A measurement tank 65 and two adsorption towers 66a and 66b for adsorbing fuel oil vapor from the gas-liquid separation measurement tank 65, etc. are provided. Collect and return the collected fuel oil to the oil supply system.

  The gas-liquid separation measuring tank 65 is supplied from the condenser 64, the fuel oil in which the fuel oil vapor is condensed, the water in which the air that has entered the vapor return pipe is condensed, and the fuel oil vapor and the air that are not condensed. Are provided to separate water, fuel oil and gas, respectively.

  As shown in FIG. 7, the gas-liquid separation measuring tank 65 includes a tank 71 mainly storing fuel oil and water, an inlet 72 and a gas outlet 73 above the tank 71, and water at the bottom of the tank 71. A discharge port 74; a fuel oil discharge port 75 at the bottom of the tank 71; two liquid level sensors 76 and 77 disposed in the tank 71 for monitoring the liquid levels of fuel oil and water; 77, a control unit 78 that is electrically connected to the tank 71 and closes the upper opening of the tank 71, and a water return valve 79 and a gasoline return valve 80 that open and close the water discharge port 74 and the fuel oil discharge port 75, respectively, according to signals from the control unit 78. Etc. In addition, since fuel oil has a specific gravity smaller than water, it isolate | separates naturally above water, and the gas which flowed in from the inflow port 72 is discharged | emitted from the gas discharge port 73. FIG.

  The liquid level sensor 76 detects and detects that the float 76a that generates buoyancy with respect to water and includes the magnetic material, the stoppers 76b and 76c that regulate the vertical movement of the float 76a, and the float 76a have moved to the upper limit position. And a magnetic sensor 76d that outputs a signal.

  The liquid level sensor 77 is disposed above the liquid level sensor 76, generates buoyancy with respect to the oil, and includes a float 77a containing a magnetic material, and stoppers 77b and 77c (77c is a stopper 76b) that regulates the vertical movement of the float 77a. And a magnetic sensor 77d that detects that the float 77a has moved to the upper limit position and outputs a detection signal.

  When the detection signals of the magnetic sensors 76d and 77d are input to the control unit 78, the control unit 78 controls the water return valve 79 and the gasoline return valve 80 to open at different timings so that fuel oil and water are respectively supplied. Discharge.

Japanese Patent No. 5598682

  In the gas-liquid separation measuring tank 65, when the magnetic sensor 77d detects that the float 77a has moved to the upper limit position, the control unit 78 fully opens the gasoline return valve 80 for a predetermined time (for example, 4 seconds). The amount of recovered fuel oil was calculated based on the diameter of the fuel oil discharge port 75. However, there may be an error between the calculated value of the fuel oil recovery amount and the actual recovery amount due to the processing accuracy of the fuel oil discharge port 75 and the change in pressure before and after the gas-liquid separation measuring tank 65.

  Therefore, the present invention has been made in view of the above problems, and reduces an error between the calculated value of the fuel oil recovery amount from the fuel oil vapor and the actual recovery amount, and measures the fuel oil recovery amount. The purpose is to improve accuracy.

  In order to achieve the above-mentioned object, the present invention is an oil supply device, wherein one end is connected to an oil storage tank and the other end is connected to an oil supply hose having an oil supply nozzle, and the oil supply pipe is interposed in the oil supply pipe. An oil supply system having an oil supply pump and a flow meter, a vapor return pipe having one end opened in the vicinity of the oil supply nozzle, a compression pump, a condenser and a gas-liquid separation measuring tank interposed in the vapor return pipe, and the gas-liquid In a fuel supply apparatus comprising a vapor liquefaction recovery system having an adsorption tower for adsorbing fuel oil vapor from a separation measurement tank, the gas-liquid separation measurement tank is configured to supply the fuel oil in the gas-liquid separation measurement tank to the oil supply system. A fuel oil return valve for returning, a fuel oil upper limit sensor for detecting that the fuel oil in the gas-liquid separation measuring tank has reached the upper limit level, and the fuel oil in the gas-liquid separation measuring tank has reached the lower limit level A fuel oil lower limit sensor that detects The fuel oil return valve receives a detection signal when the fuel oil upper limit sensor detects that the fuel oil has reached the upper limit level, and is fully opened, and indicates that the fuel oil has reached the lower limit level. When the fuel oil lower limit sensor detects, the detection signal is received and the fuel oil lower limit sensor is fully closed.

  According to the present invention, since the fuel oil lower limit sensor is provided, the valve closing control based on the capacity of the gas-liquid separation measuring tank, that is, the volume of the fuel oil, instead of the valve closing control based on the time after the valve opening as in the prior art. The error between the calculated value of the fuel oil recovery amount and the actual recovery amount can be reduced, and the measurement accuracy of the fuel oil recovery amount can be improved.

  In the fueling device, each of the fuel oil upper limit sensor and the fuel oil lower limit sensor includes a float that generates buoyancy with respect to the fuel oil and includes a magnetic material, and a magnetic sensor that detects the proximity of the float. Can do.

  Further, the fuel oil upper limit sensor and the fuel oil lower limit sensor can be arranged on the same substrate. Thereby, adjustment of the relative position of both sensors becomes unnecessary, and the manufacturing cost can be reduced.

  Furthermore, the gas-liquid separation measuring tank includes a case for accommodating the substrate, and the case has an opening in an upper portion, and when the substrate is accommodated in the case from the opening, the lower end of the substrate is The substrate can be configured to abut against the bottom surface of the case and be positioned with respect to the case.

  The gas-liquid separation measuring tank includes a tank body having the fuel oil return valve and a lid that closes the opening of the case, and the lid abuts against an end of the tank body, thereby Positioning, that is, positioning of both sensors can be easily performed.

  As described above, according to the present invention, it is possible to improve the measurement accuracy of the fuel oil recovery amount.

It is a partially broken perspective view which shows one Embodiment of the oil supply apparatus which concerns on this invention. It is a block diagram which shows the structure of the oil supply apparatus shown in FIG. It is a partially broken front view of the separation unit containing the gas-liquid separation measuring tank shown in FIG. It is the A section enlarged view of Drawing 3, and shows only a substrate and a case. It is the graph which compared the error which arises between the calculation value of gasoline recovery amount, and actual recovery amount with a prior art example. It is a block diagram which shows an example of the conventional vapor | steam liquefaction collection system. It is a longitudinal cross-sectional view of the gas-liquid separation measuring tank shown in FIG.

  Next, an embodiment for carrying out the present invention will be described in detail with reference to the drawings.

  1 and 2 show an embodiment of a fueling device according to the present invention. The fueling device 1 includes a vapor liquefaction recovery system 2, a fueling system 3, a fueling amount, etc., which are characteristic parts of the present invention. A display unit 5 for displaying, a nozzle hook 6 for hooking the fueling nozzle, and the like are provided.

  The oil supply system 3 includes an oil supply pipe 31 connected at one end to the oil storage tank T, an oil supply pump 32 interposed in the oil supply pipe 31, an electromagnetic valve 33 and a flow meter 34, and a safety joint 35 at the other end of the oil supply pipe 31. And an oil supply nozzle 37 provided at the tip of the oil supply hose 36 and applied to the nozzle hook 6 (see FIG. 1). Each component other than the oil pump 32 is provided with six (3 oil types × 2 sets) in order to correspond to a plurality of oil types, and oil can be supplied to two automobiles simultaneously on both sides of the oil supply device 1. it can.

  The vapor liquefaction recovery system 2 includes a vapor return pipe 21 having one end opened near the oil supply nozzle 37, a compression pump 22 and a separation unit 23 interposed in the vapor return pipe 21, a motor 24 for driving the compression pump 22, and the like. Is provided.

  The separation unit 23 is a condenser 23a for condensing gasoline vapor (hereinafter referred to as "vapor"), and a gas for separating the mixture of vapor, air, gasoline and water discharged from the condenser 23a into gas, gasoline and water, respectively. After adsorbing vapor from the liquid separation measurement tank 23b, the gas discharged from the gas-liquid separation measurement tank 23b, two adsorption towers 23c and 23d for desorption and returning to the condenser 23a, the condensers 23a and two And a cooling unit 23e for cooling the adsorption towers 23c and 23d with gasoline to be described later.

  As shown in FIG. 3, the gas-liquid separation measuring tank 23 b includes a tank body 41 for storing gasoline and water, an inlet 42 and a gas outlet 43 at the upper end of the tank body 41, and water at the bottom of the tank body 41. A discharge port 44 and a gasoline discharge port 45 are provided at the bottom of the tank. In the tank body 41, a liquid level sensor 46 for monitoring the liquid level of water and a liquid level sensor 47 for monitoring the liquid level of gasoline are arranged, and a controller 48 electrically connected to both the sensors 46, 47. Closes the upper opening of the tank body 41. A gasoline return valve 25 and a water return valve 49 are provided for opening and closing the gasoline discharge port 45 and the water discharge port 44, respectively, according to a signal from the control unit 48.

  The liquid level sensor 46 detects and detects that the float 46a, which generates buoyancy with respect to water, includes a magnetic material, the stoppers 46b and 46c for restricting the vertical movement of the float 46a, and the float 46a has moved to the upper limit position. And a magnetic sensor 46d for outputting a signal.

  On the other hand, the liquid level sensor 47 is disposed above the liquid level sensor 46, generates buoyancy with respect to gasoline, and includes a float 47a containing a magnetic material, stoppers 47b and 47c for regulating the vertical movement of the float 47a, and a float 47a. The magnetic sensor 47d detects that the sensor has moved to the upper limit position and outputs a detection signal, and the magnetic sensor 47e detects that the float 47a has moved to the lower limit position and outputs a detection signal.

  Magnetic sensors 46d, 47d, 47e are arranged on one substrate 50. Thereby, it is possible to prevent the relative positions of the magnetic sensors 46d, 47d, 47e from being varied due to the assembling work, and the quality can be easily maintained even if the separation unit 23 is mass-produced.

  When the substrate 50 is accommodated in the case 51, as shown in FIG. 4, the lower end 50 a of the substrate 50 comes into contact with the bottom surface 51 a of the case 51, and the substrate 50 can be positioned in the vertical direction with respect to the case 51. Further, as shown in FIG. 3, the lid 52 integrated with the case 51 in order to close the upper opening of the case 51 is brought into contact with the end 41a of the tank body 41 of the gas-liquid separation measuring tank 23b. The case 51 can be positioned with respect to the tank body 41. Thus, the position of the substrate 50 with respect to the tank body 41 is determined, and the positions of the magnetic sensors 46d, 47d, 47e with respect to the tank body 41 are determined. Here, the tank body 41 is a casting and has a draft, but if the positions of the magnetic sensors 47d (upper limit sensor) and 47e (lower limit sensor) with respect to the tank body 41 are the same, the volume (recovery) according to the draft is collected. Volume) becomes equal, the recovered amount can be stabilized with high accuracy, and quality can be maintained during mass production.

  On the other hand, as shown in FIG. 2, gas is supplied to one of the adsorption towers 23c and 23d, and vapor is desorbed from the other of the adsorption towers 23c and 23d. A switching valve 26 for switching the flow path is additionally provided.

  In each of the adsorption towers 23c and 23d, a check valve 27 for introducing outside air into the adsorption towers 23c and 23d and transporting the vapor, and a relief for reducing the pressure in the adsorption towers 23c and 23d to a predetermined value or less. A valve 28 is attached to each.

  Next, the vapor collection operation of the fueling apparatus 1 having the above configuration will be described with reference to FIGS.

  When the fuel pump 32 is turned on and fueling is started, the gasoline G1 is supplied from the underground tank T to the cooling unit 23e of the separation unit 23, and the condenser 23a and the two adsorption towers 23c and 23d in the cooling unit 23e are connected. Cooling. The cooled gasoline G2 is mixed with gasoline recovered from a gas-liquid separation measuring tank 23b, which will be described later, through a gasoline return valve 25, and returned to the fuel pump 32 as gasoline G3. Thereafter, the gasoline G4 is actually supplied to the vehicle through the oil supply nozzle 37 and the like. The amount of oil supplied by the oil supply pump 32 is measured by the flow meter 34.

  When the supply of gasoline from the refueling nozzle 37 is started, the compression pump 22 is turned on. It flows to 22a and is introduced into the condenser 23a.

  The gas introduced into the condenser 23a is sent to the gas-liquid separation measuring tank 23b while being uniformly cooled by the gasoline flowing through the cooling unit 23e as described above. Here, the vapor is compressed and cooled, and a part of the vapor changes to gasoline, and a part of the air conveyed together with the vapor changes to water.

  Of the water, gasoline, air, and vapor supplied from the condenser 23a to the gas-liquid separation measuring tank 23b through the inlet 42, water and gasoline settle in the tank body 41, and gasoline having a specific gravity smaller than water is water. Move up. On the other hand, air and vapor stay in the upper part of the tank body 41.

  Then, when the liquid level of gasoline settled in the tank body 41 reaches the upper limit position, that is, when the float 47a rises and the magnetic sensor 47d detects the proximity of the float 47, the magnetic sensor 47d detects the controller 48. A signal is transmitted, and the control unit 48 fully opens the gasoline return valve 25.

  After the gasoline return valve 25 is fully opened, when the gasoline level reaches the lower limit position, that is, when the float 47a descends from the upper limit position and the magnetic sensor 47e detects the proximity of the float 47a, the control unit controls the magnetic sensor 47e. A detection signal is transmitted to 48, and the control unit 48 fully closes the gasoline return valve 25 and returns the gasoline from the gasoline discharge port 45 to the fuel supply pump 32.

  The valve closing control by the magnetic sensor 47e is one of the features of the present invention, and this valve closing control is not based on the time after the gasoline return valve 25 is opened as in the prior art. That is, since it is based on the volume of gasoline, an error between the calculated value of the gasoline recovery amount and the actual recovery amount can be reduced.

  When the liquid level of the water settling in the tank body 41 reaches the upper limit position, that is, when the float 46a rises and the magnetic sensor 46d detects the proximity of the float 46a, the water return valve 49 is fully opened and the water discharge port is opened. Drain water from 44.

  On the other hand, vapor and air staying in the upper part of the tank body 41 are conveyed from the outlet 43 to the switching valve 26. Here, by setting the flow path of vapor or the like to the state indicated by the solid line in FIG. 2 by the switching valve 26, the vapor and air are introduced into the adsorption tower 23c and the vapor is adsorbed. The air introduced into the adsorption tower 23 c together with the vapor is discharged to the outside through the relief valve 28. At the same time, the vapor adsorbed on the adsorption tower 23d is desorbed. The desorbed vapor is supplied to the vacuum side 22b of the compression pump 22 via the switching valve 26 and returned to the vapor return pipe 21 again.

  When the fuel amount of gasoline reaches a predetermined value (for example, 50 L), the switching valve 26 switches the flow path of vapor or the like to the state indicated by the broken line in FIG. As a result, the vapor and air are introduced into the adsorption tower 23d and the vapor is adsorbed. The air introduced into the adsorption tower 23d together with the vapor is discharged to the outside through the relief valve 28. At the same time, the vapor adsorbed on the adsorption tower 23c is desorbed. The desorbed vapor is supplied to the vacuum side 22b of the compression pump 22 via the switching valve 26 and returned to the vapor return pipe 21 again.

  By switching the flow path of vapor or the like by the switching valve 26, the above operation is repeated, and vapor adsorption is alternately performed by the two adsorption towers 23c and 23d. As a result, the adsorption towers 23c and 23d can be prevented from being saturated, and the vapor generated during refueling can be reliably recovered.

  The case where the gas-liquid separation measuring tank 23b in the present embodiment is used as an example, and the case where the conventional gas-liquid separation measuring tank 65 is used as a comparative example, the calculated value of the gasoline recovery amount and the actual recovery When the amount error was measured, the result shown in FIG. 5 was obtained. In addition, an Example is shown with a continuous line, and a comparative example is each shown with a dashed-dotted line.

  In the figure, the vertical axis shows the difference (mL) between the meter count amount (calculated value of the amount of gasoline recovered from the vapor) and the actual recovery amount in one recovery operation, and the horizontal axis shows the gas-liquid separation. The pressure difference (kPa) before and after the measurement tank 23b is shown.

  From the figure, in the comparative example, the error increases in proportion to the pressure difference before and after the gas-liquid separation measuring tank 23b, and the pole difference E2 reaches 27.6 mL. This value is ± 9.2% of the actual recovery. On the other hand, in the example, although the error increases in proportion to the pressure difference, the extreme difference E1 is only 0.1 mL, and this value is only ± 0.2% of the actual recovered amount, which is more than the comparative example. The error is remarkably reduced.

  In the above description, the case of liquefying and recovering gasoline vapor has been described. However, the present invention is not limited to this, and the present invention can be applied to an apparatus that supplies various highly volatile fuel oils.

  Moreover, although the magnetic sensor was employ | adopted as a liquid level sensor, if the liquid level of fuel oil or water can be detected as mentioned above, it will not be limited to this.

  Further, the magnetic sensors 46d, 47d, 47e are arranged on one substrate 50, the substrate 50 is accommodated in the case 51, and the lid 52 that closes the opening of the case 51 is connected to the end of the tank body 41 of the gas-liquid separation measuring tank 23b. Although it is preferable that the above-described effect is achieved by contacting the portion 41a, the present invention is not limited to these configurations, and the magnetic sensor 46d and the like can be provided on two substrates.

DESCRIPTION OF SYMBOLS 1 Oil supply apparatus 2 Vapor liquefaction collection system 3 Oil supply system 5 Display part 6 Nozzle hook 21 Vapor return pipe 22 Compression pump 22a Compression side 22b Vacuum side 23 Separation unit 23a Condenser 23b Gas-liquid separation measurement tank 23c, 23d Adsorption tower 23e Cooling part 24 motor 25 gasoline return valve 26 switching valve 27 check valve 28 relief valve 31 oil supply pipe 32 oil supply pump 33 electromagnetic valve 34 flow meter 35 safety joint 36 oil supply hose 37 oil supply nozzle 41 tank body 41a end 42 inlet 43 gas outlet 44 Water outlet 45 Gasoline outlet 46 Liquid level sensor 46a Float 46b, 46c Stopper 46d Magnetic sensor 47 Liquid level sensor 47a Float 47b, 47c Stopper 47d, 47e Magnetic sensor 48 Control unit 49 Water return valve 50 Substrate 50a Lower end 51 Case 51a Bottom 52 Lid

Claims (5)

An oil supply system having one end connected to an oil storage tank and the other end connected to an oil supply hose having an oil supply nozzle, and an oil supply pump and a flow meter interposed in the oil supply pipe;
A vapor return pipe having one end opened in the vicinity of the fuel supply nozzle, a compression pump, a condenser and a gas-liquid separation measuring tank interposed in the vapor return pipe, and an adsorption for adsorbing fuel oil vapor from the gas-liquid separation measuring tank In a fueling device comprising a vapor liquefaction recovery system having a tower,
The gas-liquid separation measuring tank has a fuel oil return valve for returning the fuel oil in the gas-liquid separation measuring tank to the refueling system, and that the fuel oil in the gas-liquid separation measuring tank has reached the upper limit level. A fuel oil upper limit sensor to detect, and a fuel oil lower limit sensor to detect that the fuel oil in the gas-liquid separation measuring tank has reached a lower limit level,
The fuel oil return valve receives a detection signal when the fuel oil upper limit sensor detects that the fuel oil has reached the upper limit level and is fully opened, and indicates that the fuel oil has reached the lower limit level. When the oil lower limit sensor detects, a detection signal is received and the oil supply device is fully closed.   Each of the fuel oil upper limit sensor and the fuel oil lower limit sensor includes a float that generates buoyancy with respect to the fuel oil and includes a magnetic material, and a magnetic sensor that detects the proximity of the float. The oil supply apparatus according to claim 1.   The fuel supply apparatus according to claim 1, wherein the fuel oil upper limit sensor and the fuel oil lower limit sensor are arranged on the same substrate. The gas-liquid separation measuring tank includes a case for accommodating the substrate,
The case has an opening at the top,
4. The oil supply according to claim 3, wherein when the substrate is received in the case from the opening, a lower end of the substrate abuts against a bottom surface of the case, and the substrate is positioned with respect to the case. apparatus. The gas-liquid separation measuring tank includes a tank body having the fuel oil return valve, and a lid for closing the opening of the case.
The oil supply device according to claim 4, wherein the lid abuts against an end portion of the tank body.