KR20170047177A - Oil supplying apparatus - Google Patents

Abstract

An oil supply apparatus reduces an error between a calculation value of a fuel oil collection amount from fuel oil vapor and an actual collection amount. The oil supply apparatus (1) comprises: an oil supply system (3); a vapor collection pipe (21) whose one end is opened near an oil supply nozzle; a compression pump (22) opened to the vapor collection pipe; a condenser (23a); a gas liquid separation measurement tank (23b); and a vapor liquefaction collection system (2) having an adsorption top (23c, 23d) to adsorb fuel oil vapor from the gas liquid separation measurement tank. The gas liquid separation measurement tank comprises: a fuel oil collection valve (25) to return fuel oil to the oil supply system; a fuel oil upper limit sensor (47d); and a fuel oil lower limit sensor (47e) installed below the fuel oil upper limit sensor and installed on a position identical to the fuel oil collection valve or above the fuel oil collection valve. The fuel oil collection valve receives a detection signal to be fully opened when the fuel oil upper limit sensor detects arrival at an upper limit sensor level, and receives a detection signal to be fully closed when the fuel oil lower limit sensor detects fuel oil reaching a lower limit level.

Description

[0001]

The present invention relates to a lubrication apparatus, and more particularly to a lubrication apparatus provided in an oil supply station for supplying fuel oil to an automobile and having a vapor liquid recovery system for recovering fuel oil vapor discharged from a fuel tank such as an automobile during lubrication.

BACKGROUND ART [0002] Conventionally, in a fuel supply system for supplying highly volatile fuel oil such as gasoline to a fuel tank of an automobile or the like, fuel vapor is caused to flow out from the fuel tank according to the amount of fuel supply. When this fuel oil vapor is released to the atmosphere, not only the resources are wasted, but also there is a risk of fire or environmental pollution due to burning.

Accordingly, the applicant of the present invention has proposed a fuel supply device provided with a vapor liquid recovery system in Patent Document 1. 6, the vapor recovery system 61 includes a vapor recovery pipe 62 having one end opened in the vicinity of the oil supply nozzle, a compression pump 63 provided in the vapor recovery pipe 62, a condenser 64 Liquid separation measurement tank 65 and two adsorption towers 66a and 66b for adsorbing fuel vapor from the gas-liquid separation measurement tank 65. The condenser 64 is provided with a fuel vapor accumulator Liquefied and recovered in the gas-liquid separation measuring tank 65, and returns the recovered fuel oil to the oil supply system.

The gas-liquid separation measuring tank 65 is a tank for separating the fuel oil, which is condensed by the fuel vapor supplied from the condenser 64, the water condensed by the air entering the vapor return pipe, and the fuel vapor, Fuel oil and gas, respectively.

7, the gas-liquid separation measuring tank 65 includes a storage tank 71 for mainly storing fuel oil and water, an inlet port 72 and a gas outlet port 73 above the storage tank 71, A water discharge port 74 at the bottom of the storage tank 71 and a fuel oil discharge port 75 at the bottom of the storage tank 71 and two liquid level sensors 76 A control unit 78 that is electrically connected to the liquid level sensors 76 and 77 to block the upper opening of the storage tank 71 and a control unit 78 that controls the water discharge port 74 and the fuel oil discharge port 77, A water recovery valve 79 and a gasoline recovery valve 80 for opening and closing the fuel cell 75, respectively. Since the fuel oil has a specific gravity smaller than that of water, the fuel oil is naturally separated upward of the water and the gas introduced from the inlet port 72 is discharged from the gas outlet port 73.

The liquid level sensor 76 includes a float 76a including a magnetic material that generates buoyancy against water, stoppers 76b and 76c that regulate the up and down movement of the float 76a, And a magnetic sensor 76d for detecting the magnetic sensor 76d and outputting a detection signal.

The liquid level sensor 77 is disposed above the liquid level sensor 76 and has a float 76a including a magnetic material with buoyancy against the oil and stoppers 77b and 77c for regulating the up and down movement of the float 77a 77c also serves as a stopper 76b) and a magnetic sensor 77d for detecting that the float 77a has moved to the upper limit position and outputting a detection signal.

The control unit 78 controls the water recovery valve 79 and the gasoline recovery valve 80 to be opened at respective timings so that the fuel oil and water Respectively.

Japanese Patent No. 5598682

When the magnetic sensor 77d detects that the float 77a has moved to the upper limit position in the gas-liquid separation measuring tank 65, the control unit 78 controls the gasoline recovery valve 80 (for example, ) Was fully opened to calculate the amount of recovered fuel oil based on the valve opening time and the diameter of the fuel oil discharge port 75. [ But. There is a possibility that an error may occur 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 the pressure before and after the gas-liquid separation measurement tank 65.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to improve the measurement precision of the fuel oil recovery amount by reducing the error between the fuel oil recovery amount calculated from the fuel oil vapor and the actual recovery amount.

In order to attain the above object, the present invention provides a lubrication apparatus comprising: an oil supply pipe having one end connected to a stock oil tank and the other end connected to a fuel supply hose having an oil supply nozzle; Liquid separating measuring tank provided in the vapor collecting pipe, and an adsorption tower for adsorbing the fuel vapor from the gas-liquid separating measuring tank, Wherein the gas-liquid separating metering tank includes a fuel oil return valve for returning the fuel oil in the gas-liquid separating metering tank to the refueling system, and a fuel-oil return valve for returning the fuel oil in the gas- And a sensor for detecting that the fuel oil in the gas-liquid separation measuring tank reaches the lower limit level Provided with a lower oil sensor, the fuel oil recovery valve is characterized in that the full opening by receiving a detection signal when a fuel oil is the upper limit of the sensor has reached the upper limit of a fuel oil wherein the levels measured.

According to the present invention, since the fuel lower limit sensor is provided, the opening valve control can be performed based on the capacity of the gas-liquid separation measuring tank, that is, the volume of the fuel oil, instead of the closing valve control by the time after opening the conventional valve Therefore, 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 oil supply apparatus, the float may include a float including a magnetic material in which buoyancy of the fuel oil upper limit sensor and the fuel lower limit sensor occurs with respect to the fuel oil, and a magnetic sensor that detects the proximity of the float.

Further, the fuel oil upper limit sensor and the fuel lower limit sensor can be disposed on the same substrate. This makes it unnecessary to adjust the relative positions of both sensors, thereby reducing manufacturing costs.

In addition, the gas-liquid separation measuring tank may include a case for accommodating the substrate, wherein the case has an opening (open hole) at an upper portion thereof, and when the substrate is received in the case from the opening, And the substrate is positioned relative to the case.

The gas-liquid separation measuring tank includes a storage tank main body having the fuel oil return valve and a lid for covering an opening of the case. The lid comes into contact with the end portion of the storage tank main body to determine the position of the substrate with respect to the storage tank main body, The position of the sensor can be easily determined.

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

1 is a partially cutaway perspective view showing an embodiment of an oil supply apparatus according to the present invention.
2 is a block diagram showing the configuration of the fuel supply device shown in Fig.
3 is a partially cutaway perspective view of the separation unit including the gas-liquid separation measurement tank shown in Fig.
Fig. 4 is an enlarged view of part A of Fig. 3, showing only the substrate and the case.
5 is a graph comparing an error occurring between the calculated value of the gasoline recovery quantity and the actual recovery quantity with the conventional example.
6 is a block diagram showing an example of a conventional vapor liquid recovery system.
7 is a longitudinal sectional view of the gas-liquid separation measuring tank shown in Fig.
8 (a), 8 (b) and 8 (c) illustrate a state in which the lubrication housing and the vapor recovery housing are separated from each other so as to prevent the vapor discharged from the liquefaction recovery system from adversely affecting the oil supply system to be.

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

Fig. 1 and Fig. 2 show an embodiment of a lubrication apparatus according to the present invention. The lubrication apparatus 1 includes a vapor liquefaction recovery system 2 as a characteristic part of the present invention, a refueling system 3, And the like, a nozzle holder 6 for hanging the fuel supply nozzle, and the like.

The oil supply system 3 includes an oil supply pipe 31 whose one end is connected to the oil storage tank T, a oil supply pump 32, a solenoid valve 33 and a flow meter 34 which are installed in the oil supply pipe 31, A fuel supply hose 36 connected to the other end of the oil pipe 31 via a safety joint 35 and a fuel supply nozzle 37 (see FIG. 1) provided at the tip of the fuel supply hose 36 and hooked to the nozzle holder 6 And the like. Each of the components other than the oil feed pump 32 is provided for each of the six types (three kinds of types x 2 sets) in order to correspond to a plurality of types of oil, and oil can be simultaneously supplied to two cars from both sides of the oil supply device 1.

The vapor liquid recovery system 2 includes a vapor recovery pipe 21 having one end opened in the vicinity of the oil supply nozzle 37, a compression pump 22 and a separation unit 23 provided in the vapor recovery pipe 21, A motor 24 for driving the pump 22, and the like.

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

3, the gas-liquid separation measuring tank 23b includes a storage tank main body 41 for storing gasoline and water, an inlet port 42 and a gas outlet port 43 at the upper end of the storage tank main body 41, A water outlet 44 at the bottom of the tank 41 and a gasoline outlet 45 at the bottom of the tank. 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 disposed in the storage tank main body 41. A control portion 48, which is electrically connected to both sensors 46, 47, The upper opening of the storage tank main body 41 is blocked. A gasoline recovery valve 25 and a water recovery valve 49 for opening and closing the gasoline discharge port 45 and the water discharge port 44 are provided by the signal from the control unit 48, respectively.

The liquid level sensor 46 includes a float 46a including a magnetic material having buoyancy against water and stoppers 46b and 46c for regulating the up and down movements of the float 46a and a float 46a for moving the float 46a to the upper- And a magnetic sensor 46d for detecting the magnetic sensor 46d and outputting a detection signal.

On the other hand, the liquid level sensor 47 includes a float 47a disposed above the liquid level sensor 46 and including a magnetic material that generates buoyancy against gasoline, and stoppers 47b and 47c for regulating the up and down movement of the float 47a A magnetic sensor 47d that detects that the float 47a has moved to the upper limit position and outputs a detection signal and a magnetic sensor 47e that detects that the float 47a has moved to the lower limit position and outputs a detection signal, ).

The magnetic sensors 46d, 47d, and 47e are disposed on one substrate 50. [ As a result, unbalance can be prevented from occurring in the relative positions of the magnetic sensors 46d, 47d, and 47e by the assembling operation, and quality can be easily maintained even if the separation unit 23 is mass-produced.

4, the lower end 50a of the substrate 50 is in contact with the bottom surface 51a of the case 51, and the substrate 50 Can be positioned in the vertical direction. 3, a cover 52 integrally formed with the case 51 is fixed to the end portion 41a of the storage tank main body 41 of the gas-liquid separation measuring tank 23b to block the upper opening of the case 51. Further, The case 51 can be positioned with respect to the storage tank main body 41. As shown in Fig. The position of the substrate 50 with respect to the storage tank main body 41 is determined and the positions of the magnetic sensors 46d, 47d, and 47e with respect to the storage tank main body 41 are determined. Here, although the storage tank main body 41 has no inclination as a casting, when the positions of the magnetic sensor 47d (upper limit sensor) 47e (lower limit sensor) with respect to the storage tank main body 41 are the same, ) Can be equalized, so that the recovered amount can be stabilized with high precision, and at the same time, quality can be maintained at the time of mass production.

2, the gas is supplied to one of the adsorption towers 23c and 23d to be adsorbed, and the other one of the adsorption towers 23c and 23d removes the vapor from the other adsorption tower 23c or 23d A switching valve 26 for switching the flow path is provided.

Each of the adsorption towers 23c and 23d is provided with a backflow prevention valve 27 for introducing outside air into the adsorption towers 23c and 23d to transport the vapor and a relief valve 27 for reducing the pressure in the adsorption towers 23c and 23d to a predetermined value or less. Respectively.

Next, a description will be given, with reference to Fig. 2 and Fig. 3, of a vapor recovery operation of the oil supply apparatus 1 having the above-described configuration.

The gasoline G is supplied from the underground tank T to the cooling portion 23e of the separation unit 23 and the condenser 23a and the condenser 23b in the cooling portion 23e are supplied And the two adsorption towers 23c and 23d are cooled. The cooled gasoline G2 is mixed with gasoline recovered from a gas-liquid separation measuring tank 23b described later via a gasoline recovery valve 25 and returned to the fuel supply pump 32 as gasoline G3. Thereafter, the gasoline G4 is actually supplied to the vehicle via the oil supply nozzle 37 and the like. In addition, the amount of oil supply by the oil feed pump 32 is measured by the flow meter 34.

When the supply of gasoline is started from the oil supply nozzle 37, the compressor 22 is turned on and the vapor in the fuel tank of the vehicle is supplied to the compression pump 22 To the outlet side 22a of the condenser 23a and 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 section 23e as described above. Here, the vapor is compressed and cooled so that a part of the vapor is changed into gasoline and a part of the air carried with the vapor changes into water.

Water and gasoline in the water, gasoline, air, and vapor, which are supplied from the condenser 23a to the gas-liquid separation measuring tank 23b through the inlet 42, settle into the storage tank main body 41, Moves to the upper side of the water. On the other hand, the gas and the vapor remain on the upper part of the storage tank main body 41.

When the float 47a rises and the magnetic sensor 47d detects the proximity of the float 47, the magnetic sensor 47d detects that the liquid level of the gasoline settles in the tank main body 41 reaches the upper limit position A detection signal is transmitted to the control unit 48, and the control unit 48 makes the gasoline recovery valve 25 fully open (full opening).

When the liquid level of the gasoline 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 after the gasoline return valve 25 is opened as a whole A detection signal is transmitted from the magnetic sensor 47e to the control unit 48 so that the control unit 48 closes the gasoline recovery valve 25 entirely 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. This valve closing control is performed not by the time from when the gasoline return valve 25 is opened as in the prior art, That is, the volume of gasoline, it is possible to reduce the error between the calculated value of the gasoline recovery amount and the actual recovery amount.

When the float 46a rises and the magnetic sensor 46d detects the proximity of the float 46a, the water recovery valve 49 is closed. When the water level of the water settled in the storage tank main body 41 reaches the upper limit position, So that water is discharged from the water outlet 44 as a whole.

On the other hand, the vapor and the air staying in the upper part of the storage tank main body 41 are transported from the outlet 43 to the switching valve 26. 2, the vapor and air are introduced into the adsorption tower 23c and the vapor is adsorbed. The air introduced into the adsorption tower 23c together with the vapor is discharged to the outside through the relief valve 28. [ Simultaneously, the vapor adsorbed to the adsorption tower 23d is removed. The removed vapor is supplied to the inflow side (vacuum side) 22b of the compression pump 22 via the switching valve 26 and returned to the vapor recovery pipe 21 again.

When the supply amount of the gasoline reaches a predetermined value (for example, 50 L), the switching valve 26 changes the flow path of the vapor or the like to the state shown 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. [ Simultaneously, the vapor adsorbed to the adsorption tower 23c is removed. The removed vapor is supplied to the inlet side (vacuum side) 22b of the compression pump 22 via the switching valve 26 and returned to the vapor collecting pipe 21 again.

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

The case where the gas-liquid separation measuring tank 23b (see FIG. 3) in the present embodiment is used is described as an example, and the case of using the conventional gas-liquid separation measuring tank 65 (see FIG. 7) As a result of measuring the calculated value of the gasoline recovery quantity and the error in the actual recovery quantity, the result as shown in Fig. 5 was obtained. The examples are shown by solid lines, and the comparative examples are shown by one-dot chain lines.

5, the vertical axis represents the difference (mL) between the meter count (the calculated value of the gasoline recovery amount from the vapor) and the actual recovery amount in one recovery operation, and the horizontal axis represents the difference Represents the pressure difference (kPa).

In the same figure, in the comparative example, the error increases in proportion to the pressure difference before and after the gas-liquid separation measuring tank 65, and the difference (E2) reaches 27.6 mL. This value is ± 9.2% of the actual recovered amount. On the other hand, in the embodiment, although the error increases in proportion to the pressure difference before and after the gas-liquid separation measuring tank 23b, the difference E1 is only 0.1 mL, which is only 0.2% of the actual recovered amount. The error is remarkably reduced.

In the oil feeder 1 described above, it is preferable that the vapor prevents the vapor discharged from the liquefaction recovery system 2 from adversely affecting the oil feed system 3. Therefore, as shown in Fig. 8 (a), there is an airtight seal between the oil supply housing 55 containing the oil supply system 3 and the like and the vapor recovery housing 56 containing the vapor liquid recovery system 2 A solid vapor barrier 57 as a partition may be disposed or an air gap 58 may be provided as an air layer between the both housings 55 and 56 as shown in Fig. It is possible to cope with the situation by disposing the two housings 55 and 56 separately and inserting the gasoline piping 59 connecting the both housings 55 and 56 as shown in Fig.

In the above description, the case of liquefying and recovering the gasoline vapor has been described. However, the present invention is not limited to this, and the present invention is applicable to an apparatus for supplying various volatile fuel oils.

In addition, although a magnetic sensor is employed as the liquid level sensor, the present invention is not limited thereto as long as it can detect the liquid level of the fuel oil or water as described above.

Further, the magnetic sensors 46d, 47d, and 47e are disposed on one substrate 50, and the lid 52, which holds the substrate 50 in the case 51 and covers the opening of the case 51, But the present invention is not limited to these configurations, and it is also possible to mount the magnetic sensor 46d and the like on two substrates Do.

1 Lubrication system
2 Vapor Liquor Recovery System
3 Lubrication system
5 display unit
6 Nozzle Hanger
21 Vapor Collector
22 Compressor Pump
22a compression side
22b Vacuum side
23 separation unit
23a condenser
23b Gas-liquid separation measuring tank
23c, 23d adsorption tower
23e cooling section
24 motors
25 Gasoline recovery valve
26 Switching valve
27 Anti-backflow valve
28 Relief Valves
31 oil pipeline
32 Lubrication pump
33 solenoid valve
34 Flow Meter
35 Safety Joints
36 Lubrication hose
37 Lubrication nozzle
41 Storage tank body
41a fleet
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 sensors
48 control unit
49 Water recovery valve
50 substrate
50a bottom
51 cases
51a bottom
52 Cover

Claims (5)

An oil supply line connected to the oil storage tank at one end thereof and connected to the oil supply hose at the other end thereof with an oil supply nozzle, a oil supply system having a oil supply pump and a flow meter provided in the oil supply pipe,
A vapor recovery system comprising a vapor recovery pipe which is once opened in the vicinity of the oil supply nozzle, a compression pump installed in the vapor recovery pipe, a condenser and a gas-liquid separation measurement tank, and an adsorption tower for adsorbing the fuel oil vapor from the gas- And an oil supply device
Wherein the gas-liquid separation measurement tank includes a fuel oil recovery valve for returning fuel oil in the gas-liquid separation tank to the refueling system, a fuel-lean sensor for detecting that the fuel oil in the gas-liquid separation tank has reached an upper limit level, And a fuel lower limit sensor for detecting that the fuel oil in the separation measuring tank has reached a lower limit level,
Wherein the fuel oil return valve is configured to receive a detection signal when the fuel oil upper limit sensor detects that the fuel oil has reached the upper limit level, to make the entire fuel supply oil open, and to detect that the fuel oil reaches the lower limit level, And a detection signal is received at one time to complete the closing operation. The method according to claim 1,
Wherein each of the fuel oil upper limit sensor and the fuel lower limit sensor is composed of a float including a magnetic material that generates buoyancy against the fuel oil and a magnetic sensor for detecting the proximity of the float. 3. The method according to claim 1 or 2,
Wherein the fuel oil upper limit sensor and the fuel lower limit sensor are disposed on the same substrate. The method of claim 3,
Wherein the gas-liquid separation measuring tank has a case for accommodating the substrate,
The case has an opening at the top,
Wherein when the substrate is received in the case from the opening, the lower end of the substrate contacts the bottom surface of the case, and the substrate is positioned with respect to the case. 5. The method of claim 4,
Wherein the gas-liquid separation measuring tank includes a storage tank main body having the fuel oil return valve and a lid for covering the opening of the case,
And the lid is in contact with the end portion of the storage tank main body.

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