JP2018193130A - Lubrication device - Google Patents

Abstract

An oil supply apparatus capable of stably recovering fuel oil vapor while maintaining high liquefaction recovery efficiency of the fuel oil vapor is provided. An oil supply pipe is connected to an oil storage hose having one end connected to an oil storage tank and the other end connected to an oil supply nozzle, and an oil supply pump and a flow meter are interposed in the oil supply pipe. A fuel supply system 3, a vapor return pipe 21 having one end opened near the fuel supply nozzle, a compression pump 22 interposed in the vapor return pipe, a condenser 23a and a condenser for cooling the fuel oil vapor flowing through the vapor return pipe. A vapor liquefaction recovery system 2 having a gas / liquid separation measuring tank 23b for recovering liquefied fuel oil and a separation unit 23 having adsorption towers 23c and 23d for adsorbing fuel oil vapor from the gas / liquid separation measuring tank; The oil supply apparatus 1 in which the separation unit is cooled by the coolant from the refrigeration unit 20. [Selection] Figure 1

Description

  The present invention relates to a fueling device, and in particular, a fueling device that is installed in a fueling station that supplies fuel oil to an automobile or the like and includes a vapor liquefaction recovery system that collects fuel oil vapor that flows out of a fuel tank of the automobile or the like during fueling. 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 applicant of Patent Document 1 collects and cools fuel oil vapor flowing out from a fuel tank of an automobile or the like during refueling, collects liquefied fuel oil, and removes fuel oil vapor that has not been liquefied. The environmental load was reduced by adsorbing on the surface of the adsorbent, desorbing the adsorbed fuel oil vapor, and sending it again to the cooling process for reuse.

JP 2017-77903 A

  Although the above invention is effective, a part of gasoline, which is fuel oil sucked up from an underground tank, was used for cooling in the condenser and the adsorption tower. As shown in Fig. 13 as an example of the annual outside air temperature and the conventional cooling temperature (the temperature of the gasoline), gasoline can be expected to cool at a certain constant temperature (approximately 15 ° C) throughout the year. Cooling at lower temperatures is desirable to increase efficiency. Also, since the temperature of gasoline in the underground tank is affected to some extent by the season and outside air temperature, it has been difficult to perform stable cooling throughout the year.

  Accordingly, the present invention has been made in view of the above problems, and provides a fuel supply device that can stably recover the fuel oil vapor while maintaining high liquefaction recovery efficiency of the fuel oil vapor. With the goal.

  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 near the oil supply nozzle, a compression pump interposed in the vapor return pipe, and a fuel oil vapor flowing through the vapor return pipe are cooled. A vapor liquefaction recovery system having a condenser, a gas-liquid separation measuring tank for recovering fuel oil liquefied by the condenser, and a separation unit for adsorbing fuel oil vapor from the gas-liquid separation measuring tank; The separation unit is cooled by the coolant from the refrigeration unit.

  According to the present invention, by cooling the separation unit with the coolant from the refrigeration unit, the fuel oil vapor can be stably cooled or adsorbed on the fuel oil vapor regardless of the season and outside temperature. The fuel oil vapor can be stably recovered while maintaining high liquefaction recovery efficiency of the fuel oil vapor.

  In the fueling device, the separation unit can be covered with a heat insulating material and a heat insulating cover, whereby the temperature of the coolant can be kept low and condensation in the separation unit can be prevented.

  In addition, when the outside air temperature is within a predetermined range, a predetermined amount of the coolant from the refrigeration unit circulates between the refrigeration unit and the separation unit, and is cooled to a predetermined temperature range by the refrigeration unit. This can stabilize the temperature and amount of the coolant.

  After turning on the power of the refrigeration unit, the oil supply system and / or the vapor liquefaction recovery system can be configured not to be driven until the cooling liquid is cooled to a predetermined temperature or less, and thereby, the condensation does not occur. The fuel oil vapor can be prevented from being released to the atmosphere.

  When the coolant exceeds a predetermined temperature, the fuel supply system and / or the vapor liquefaction recovery system can be configured to stop driving, whereby the fuel oil vapor that has not been condensed is released to the atmosphere. This can be prevented.

  A relief valve provided in the exhaust pipe of the adsorption tower, and a concentration meter that measures the vapor concentration of the exhaust of the relief valve, and when the measured value of the concentration meter exceeds a predetermined value, the oil supply system and / or The vapor liquefaction recovery system can be configured to stop driving. Thereby, it is possible to prevent a gas having a high vapor concentration from being released to the atmosphere.

  A relief valve is provided in the exhaust pipe of the adsorption tower, so that the refrigeration unit can be driven at all times, whereby the temperature of the coolant is always kept low, the fuel oil vapor is reliably condensed, and the exhaust of the relief valve The vapor concentration can be kept low.

  By providing a dilution pipe for diluting the exhaust of the relief valve and releasing it to the atmosphere, the vapor concentration of the exhaust of the relief valve can be reduced to further increase safety.

  As described above, according to the present invention, it is possible to provide an oil supply apparatus that can stably recover fuel oil vapor while maintaining high liquefaction recovery efficiency of fuel oil vapor.

It is a figure which shows one Embodiment of the oil supply apparatus which concerns on this invention, Comprising: (a) is a front view, (b) is a side view. It is a partially broken perspective view of the oil supply apparatus shown in FIG. It is a block diagram which shows the structure of the oil supply apparatus shown in FIG. It is a block diagram which shows the structure of the refrigeration unit provided in the oil supply apparatus shown in FIG. It is a figure which shows the solid vapor barrier used when installing the refrigeration unit shown in FIG. 4, Comprising: (a) is a partially broken whole perspective view of an oil supply apparatus, (b) is the case where the solid vapor barrier is seen from the front side (C) is a perspective view when the solid vapor barrier is viewed from the back side. It is a schematic front view for demonstrating the vapor | steam barrier structure of the oil supply apparatus which concerns on this invention. It is a flowchart for demonstrating operation | movement of the circulation pump of the refrigeration unit shown in FIG. 4, a compressor, and a solenoid valve. It is operation | movement explanatory drawing of the circulation pump of the refrigeration unit shown in FIG. 4, an air cooling fan, a compressor, and a solenoid valve. It is a flowchart for demonstrating 1st Embodiment of the cooling operation of the cooling fluid immediately after power activation of a freezing unit. It is a flowchart for demonstrating 2nd Embodiment of the cooling operation of the cooling fluid immediately after power activation of a freezing unit. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the oil pump used with the oil supply apparatus which concerns on this invention, Comprising: (a) is a figure for demonstrating a basic structure, (b) is exhaust_gas | exhaustion of a relief valve being introduce | transduced into the outlet pipe of an air separator FIG. 8C is a diagram showing a case where the exhaust of the relief valve is introduced to the discharge side of the overflow prevention valve in the float chamber. The dilution pipe which dilutes the exhaust_gas | exhaustion of a relief valve is shown, (a) is a perspective view, (b) is a top view of (a), (c) is a side view of (a). It is the graph which compared the cooling temperature (temperature of a cooling fluid) of the vapor with the oil supply apparatus which concerns on this invention, and the conventional oil supply apparatus.

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

  FIGS. 1 to 3 show an embodiment of a fueling device according to the present invention. The fueling device 1 includes a vapor liquefaction recovery system 2 and a fueling hose 4 (4A to 4C) which are characteristic parts of the present invention. An oil supply system including an oil supply nozzle 5 (5A to 5C) connected to one end of the oil supply hose 4, a nozzle hook 6 (6A to 6C) for applying the oil supply nozzle 5, and a display unit 7 for displaying the amount of oil supply etc. 3.

  The oil supply system 3 includes an oil supply pipe 31 having one end connected to the oil storage tank T, an oil supply pump 32 provided 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. An oil supply hose 4 connected via the oil supply hose 4 and an oil supply nozzle 5 provided at the tip of the oil supply hose 4 and applied to the nozzle hook 6 are provided. 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 in the vicinity of the oil supply nozzle 5, a compression pump 22 and a separation unit 23 interposed in the vapor return pipe 21, and a motor 24 for driving the compression pump 22. A refrigeration unit 20 and the like are provided.

  As shown in FIG. 3, the separation unit 23 is disposed near the condenser 23a for condensing gasoline vapor (hereinafter referred to as “vapor”), vapor, air, and gasoline discharged from the condenser 23a. And a gas-liquid separation measuring tank 23b that separates a mixture of water into gas, gasoline, and water, and a gas that is disposed on both sides of the condenser 23a and the gas-liquid separation measuring tank 23b and discharged from the gas-liquid separation measuring tank 23b Are provided with two adsorption towers 23c and 23d for desorbing and returning the vapor to the condenser 23a.

  Further, although not shown, the separation unit 23 is a space (hereinafter referred to as “cooling unit”) that houses the condenser 23a and the two adsorption towers 23c and 23d in order to cool the vapor and improve the condensation and adsorption performance. 23e is configured to be filled with a coolant (antifreeze) from the refrigeration unit 20.

  The two adsorption towers 23c and 23d are configured to have the same shape in order to unify the adsorption performance, and are filled with an adsorbent such as silica gel, zeolite, activated carbon or the like. Further, 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 pressure in the adsorption towers 23c and 23d are set to a predetermined value or less. Relief valves 28 are respectively attached. Hereinafter, the exhaust of the relief valve 28 refers to that for releasing the pressure in the flow path when the pressure in the flow path in which the relief valve 28 is provided exceeds a predetermined value.

  A concentration meter 29 (see FIG. 3) for measuring the vapor concentration of the gas flowing through the discharge tube 13 is attached to the discharge tube 13 (see FIG. 2) connected to the relief valve 28.

  As shown in FIG. 4, the refrigeration unit 20 includes a sub tank 41 and a coolant tank 42 for storing coolant, a circulation pump 43, a flow rate sensor 44 and a temperature sensor 45 disposed in the coolant supply line 46, and a coolant. And a plate heat exchanger 53 disposed in the return line 47.

  Further, the refrigeration unit 20 includes a condenser 48, an air cooling fan 49 (49A, 49B), a compressor 51, an expansion valve 52 (52A, 52B), and an electromagnetic valve 50 in the refrigerant lines 54, 55. In the plate heat exchanger 53, the coolant is cooled using a refrigerant.

  When the refrigeration unit 20 is installed on the upper part of the vapor liquefaction recovery system 2, a solid vapor barrier 61 is interposed as shown in FIG. The solid vapor barrier 61 is formed in an L-shaped plate shape, the horizontal plate-like portion 61a is connected between the vapor liquefaction recovery system 2 and the refrigeration unit 20, and the vertical plate-like portion 61b is connected to the main body housing 8 of the fuel supply device 1. Even when the refrigeration unit 20 is shut off and the refrigeration unit 20 has a non-explosion-proof structure, the vapor is prevented from entering the refrigeration unit 20 to ensure safety.

  As shown in FIG. 5 (b), the solid vapor barrier 61 is provided with through holes 61c at six locations of the horizontal plate-like portion 61a, and cable clamps 61d are arranged in the respective through holes 61c. The cable is passed through while maintaining confidentiality. Also, welding studs 61e are erected at four locations on the horizontal plate-like portion 61a, and bolts 61g are inserted into the through holes 61f drilled at two locations on the vertical plate-like portion 61b to use seal washers 61h. The solid vapor barrier 61 is fixed to the vapor liquefaction recovery system 2 and the main body housing 8 while preventing the vapor from entering the refrigeration unit 20.

  As shown in FIG. 6, in addition to the solid vapor barrier 61, a plate-like vapor barrier (meter-side vapor barrier) 62 is also provided between the oil supply system 3 and the display unit 7. Both vapor barriers 61 and 62 block the inside of the display unit 7 and the refrigeration unit 20 from the vapor, and ensure safety even when the refrigeration unit 20 and the display unit 7 have a non-explosion-proof structure.

  In addition, as shown in FIG. 1, refrigeration unit housings 9 (9A, 9B) containing refrigeration units 20 are provided with louvers 10 (10A, 10B), and air is sucked and exhausted from these louvers 10 so as to It is possible to prevent heat from being trapped in the unit housing 9 and maintain high cooling efficiency.

  Further, as shown in FIG. 2, discharge ports 11 and 12 are provided in the lower portion of the oil supply device 1, and the discharge port 11 is connected to an outlet pipe 32 d of an air separator 32 a of an oil supply pump 32 (see FIG. 11) described later. The discharge port 12 communicates with the relief valve 28 of the separation unit 23 via the discharge pipe 13.

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

  First, the operation of cooling the cooling liquid used in the separation unit 23 with the refrigeration unit 20 will be described with reference to FIGS. 4, 7 and 8.

  As shown in FIG. 7, it is determined whether or not the outside air temperature T is t1 to t2, for example, 10 ° C. to 40 ° C. in step S1, and if it is within this range (step S1; Yes), the circulation pump 43 is started (step S2), and it is determined whether or not the amount Q of the coolant measured by the flow rate sensor 44 in step S3 has reached a predetermined amount q1, and when it becomes q1 (step S3). Yes), in step S4, it is determined whether the outside air temperature T is lower than t1 or higher than t2, and in either case (step S4; Yes), the operation of the circulation pump 43 is stopped in step S5. On the other hand, when the amount Q of the coolant does not become the predetermined amount q1 in step S3 (step S3; No), an error is displayed in step S6 and the process is terminated. With the above operation, when the outside air temperature T is within a predetermined temperature range, a predetermined amount of coolant is circulated.

  Further, it is determined whether or not the temperature T of the coolant measured by the temperature sensor 45 in step S11 is t3, for example, 2 ° C. or higher. If it is 2 ° C. or higher (step S11; Yes), the compressor 51 is operated. Start (step S12), the refrigerant in a low-pressure gas state supplied from the plate heat exchanger 53 is compressed, converted into a high-pressure gas, and supplied to the condenser 48 via the refrigerant line 54. Next, the refrigerant in the high-pressure gas state supplied from the compressor 51 is condensed by the condenser 48 and converted into a refrigerant in the high-pressure liquid state to take away the heat of condensation, and the taken-off heat is released to the outside by the air cooling fan 49. . Further, the high-pressure liquid refrigerant supplied from the condenser 48 via the refrigerant line 55 is changed to a low-pressure state by the expansion valve 52B and supplied to the plate heat exchanger 53 to cool the coolant. The flow rate of the refrigerant flowing through the refrigerant lines 54 and 55 is controlled by adjusting the valve opening degree of the expansion valve 52B. In the above operation, the electromagnetic valve 50 is closed.

  Next, in step S13, it is determined whether or not the temperature T of the coolant is t4, for example, -1 ° C or lower. If the temperature is -1 ° C or lower (step S13; Yes), the operation of the compressor 51 is stopped (step S13). S14), the cooling operation of the coolant is stopped. By repeating the above operation, the temperature of the coolant is maintained within a predetermined range, for example, -1 ° C to 2 ° C.

  Further, in step S21, it is determined whether or not the temperature T of the coolant is t5, for example, 2 ° C. or less. If the temperature is 2 ° C. or less (step S21; Yes), the solenoid valve 50 is opened (step S22), By reducing the flow rate of the refrigerant flowing through the lines 54 and 55 by half, the cooling capacity of the refrigeration unit 20 is reduced to 50%. Next, in step S23, it is determined whether or not the temperature T of the coolant is t6, for example, 3 ° C. or higher. If it is 3 ° C. or higher (step S23; Yes), the electromagnetic valve 50 is closed (step S24), Increase the cooling capacity of the unit 20 to 100%. By the above operation, the coolant can be stably maintained at a predetermined temperature or lower, for example, about 2 ° C. throughout the year as shown in FIG.

  Next, the vapor recovery operation by the vapor liquefaction recovery system 2 will be described with reference to FIGS. 1 and 2 focusing on FIG.

  When the oil supply pump 32 is turned on and the oil supply is started, the cooling liquid is supplied from the refrigeration unit 20 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 coolant is returned to the refrigeration unit 20.

  When the supply of gasoline from the refueling nozzle 5 is started, the compression pump 22 is turned on, and the vapor generated by refueling and the air in the fuel tank of the vehicle are compressed by the compression pump 22 via the vapor return pipe 21. 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 cooled by the cooling liquid flowing through the cooling unit 23e. 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.

  The gasoline and water supplied to the gas-liquid separation measuring tank 23b settle to the bottom, and the gasoline having a specific gravity smaller than that of the water moves above the water. And when gasoline or water accumulates more than predetermined amount by control of the liquid level sensor which is not illustrated, gasoline and water are each discharged.

  On the other hand, the vapor and air staying in the upper part of the gas-liquid separation measuring tank 23b are introduced into the adsorption tower 23c to adsorb the vapor. 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 and returned to the vapor return pipe 21 again.

  When the amount of gasoline supplied reaches a predetermined value (for example, 50 L), the vapor and air are introduced into the adsorption tower 23d by switching the flow path of the vapor 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 and returned to the vapor return pipe 21 again.

  The above operation is repeated by switching the flow path of vapor or the like as described above, 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.

  As described above, according to the present embodiment, the condenser 23a and the two adsorption towers 23c, 23d of the separation unit 23 are cooled by the cooling liquid from the refrigeration unit 20, so that they are stable regardless of the season and outside temperature. Thus, the fuel oil vapor can be cooled and the fuel oil vapor can be adsorbed, and the fuel oil vapor can be stably recovered while maintaining high liquefaction recovery efficiency of the fuel oil vapor.

  As described above, by cooling the cooling liquid used in the separation unit 23 with the refrigeration unit 20, the cooling liquid can be maintained at about 2 ° C. throughout the year, for example. However, this is a case where the power supply of the refrigeration unit 20 is always on, and when the power supply of the refrigeration unit 20 is turned off, the temperature of the coolant rises.

  Therefore, immediately after turning on the power of the refrigeration unit 20 such as when the gas station is opened, the coolant may not be cooled to a predetermined temperature or lower. When refueling is started in this state, the condenser 23a of the separation unit 23 And since the two adsorption towers 23c, 23d are not sufficiently cooled, the vapor generated by refueling is not recovered and is discharged from the discharge port 12 via the relief valve 28 and the discharge pipe 13, There is a possibility that the vapor concentration in the exhaust gas of the fueling apparatus 1 may exceed the lower limit of gasoline explosion (about 1.4 vol%).

  In order to avoid such a situation, a first embodiment of the cooling operation of the coolant immediately after the refrigeration unit 20 is turned on will be described with reference to FIG.

  As shown in FIG. 9, when the power of the refrigeration unit 20 is turned on in step S31 (step S31; Yes), the operation of the circulation pump 43 is started (step S32). Even if the power of the refrigeration unit 20 is not turned on in step S31 (step S31; No), for example, the current time T becomes the gas station start time T1 (for example, 30 minutes before the gas station start time). Even in the case (step S33; Yes), the operation of the circulation pump 43 can be started (step S32). Thereby, the coolant in the refrigeration unit 20 can be sufficiently cooled.

  Next, it is determined whether or not the amount Q of the coolant measured by the flow sensor 44 in step S34 has reached a predetermined amount q1, and if it has reached q1 (step S34; Yes), the process proceeds to step S35. . On the other hand, when the amount Q of the coolant is not the predetermined amount q1 (step S34; No), the amount of the coolant is insufficient, so an error is notified (step S36), and the operation is terminated. .

  In step S35, it is determined whether or not the temperature T of the coolant has become equal to or lower than a predetermined temperature t7. If it has become equal to or lower than t7 (step S35; Yes), vapor recovery permission is output to the compression pump 22 (step S35). S37), the compression pump 22 starts operation. On the other hand, when the temperature T of the coolant is not equal to or lower than the predetermined temperature t7 (step S35; No), it is notified that refueling is not possible until the temperature becomes equal to or lower than the temperature t7 (step S38).

  When the vapor collection permission is input in step S41 (step S41; Yes), the compression pump 22 becomes capable of sucking the vapor, and notifies the oiler of the possibility of refueling (step S42).

  Returning to the refrigeration unit 20, if it is determined in step S39 that the coolant temperature T has exceeded the predetermined temperature t7 (step S39; Yes), the refrigeration unit 20 outputs a vapor recovery permission stop to the compression pump 22 ( Step S40). Along with this, the compression pump 22 to which the vapor collection permission stop is input from the refrigeration unit 20 (step S43; Yes) informs the oil supplier that refueling is not possible (step S44), and the operation ends.

  By the above operation, the oil supplier is informed that refueling is not possible until the coolant reaches a predetermined temperature, and the compression pump 22 cannot recover the vapor. Therefore, the vapor concentration in the exhaust gas from the refueling device 1 falls below the lower explosion limit of gasoline. It is possible to avoid exceeding.

  However, in the first embodiment, since the operation of the refueling system 3 is not limited only by notifying the refueling person that refueling is not possible, the refueling person may perform refueling without following the refueling impossibility. possible. Therefore, a second embodiment of the cooling operation of the coolant immediately after the refrigeration unit 20 is turned on will be described with reference to FIG.

  In the present embodiment, not only the compression pump 22 but also the oil supply system until the temperature T of the coolant becomes equal to or lower than the predetermined temperature t7 and when the temperature T of the coolant subsequently exceeds the predetermined temperature t7. The operation of 3 is also restricted. In addition, about the operation | movement same as the said 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the refrigeration unit 20, when it is determined in step S35 that the coolant temperature T has become equal to or lower than the predetermined temperature t7 (step S35; Yes), the oil supply permission and the vapor recovery permission are output to the oil supply system 3 and the compression pump 22, respectively. (Step S51).

  The oil supply system 3 to which the refueling permission is input (step S61; Yes) notifies the oiler of the possibility of refueling (step S62), and until the refueling permission stop is input (step S63; Yes), the oil supply system 3 The refueling possible state continues.

  In the refrigeration unit 20, when it is determined in step S52 that the coolant temperature T has exceeded the predetermined temperature t7 (step S52; Yes), the fuel supply permission stop and the vapor recovery permission stop are performed on the fuel supply system 3 and the compression pump 22, respectively. Is output (step S53).

  Refueling system 3 to which the refueling permission stop is input (step S63; Yes) informs the refueling person that refueling is not possible (step S64) and ends the operation. The compression pump 22 also ends its operation as described above.

  In the above description, the case where the operation of the oil supply system 3 and the compression pump 22 is stopped when it is determined that the temperature T of the coolant has exceeded the predetermined temperature t7 (step S52; Yes) has been described. The vapor concentration of the exhaust gas from the relief valve 28 is measured by the concentration meter 29 shown in FIG. 6 and the operation of the oil supply system 3 and the compression pump 22 may be stopped when it is determined that the measured value exceeds the threshold value.

  On the other hand, as shown in FIG. 3, in order to avoid the case where the coolant is not cooled to a predetermined temperature or less immediately after the refrigeration unit 20 is turned on, the refrigeration unit 3 and the refrigeration unit 20 are powered separately, The 20 power supplies can also be kept on at all times.

  If the power supply of the refrigeration unit 20 is kept on at all times, the coolant is sufficiently cooled, and the vapor concentration of the exhaust of the relief valve 28 is sufficiently low, so that this exhaust is passed through the exhaust pipe 13 and the exhaust port 12 as it is. There is no problem even if it is released to the atmosphere. However, in order to further improve safety, the exhaust of the relief valve 28 can be introduced into the gas flow path of the oil supply pump 32, the oil storage tank T, and the vent pipe connected to the oil storage tank T.

  Here, the configuration of the oil supply pump 32 will be briefly described. As shown in FIG. 11A, the oil supply pump 32 is provided with an air separator 32a that removes air in the gasoline, and this air separator 32a has a cylindrical path (not shown) that swirls the gasoline that flows in at high speed. ) And a float chamber 32b for separating air contained in gasoline flowing in from the cylindrical path. The float chamber 32b is provided with an overflow prevention valve 32c that prevents overflow of gasoline flowing in from the cylindrical path.

  As shown in FIG. 11B, the exhaust from the relief valve 28 (see FIG. 3) is connected to the outlet pipe 32d of the air separator 32a via the introduction pipe 65, or as shown in FIG. 11C. The relief valve 28 is connected to the discharge side of the overflow prevention valve 32c of the float chamber 32b through the introduction pipe 66, and the exhaust from the relief valve 28 is discharged to the atmosphere from the discharge port 11, or the oil storage tank T or the oil storage tank. It can also be introduced into a vent pipe connected to T.

  Also, the discharge pipe 13 connected to the relief valve 28 shown in FIGS. 2 and 3, a pipe (not shown) for connecting the relief valve 28 and the vent pipe, or an introduction pipe shown in FIGS. 11 (b) and 11 (c). In the middle of 65 and 66, a dilution pipe 71 shown in FIG. The dilution pipe 71 includes a hollow cylindrical base 71a, an inlet 71b and an air inlet 71c provided at the top of the base 71a, and an outlet 71d provided at the bottom of the base 71a. According to the above, since the exhaust of the relief valve 28 flowing in from the inlet 71b can be diluted with the air from the air inlet 71c and further reduced in vapor concentration, it can be discharged from the outlet 71d. As compared with the case where the exhaust gas is directly discharged to the atmosphere, safety can be further improved.

  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.

DESCRIPTION OF SYMBOLS 1 Oil supply apparatus 2 Vapor liquefaction collection system 3 Oil supply system 4 (4A-4C) Oil supply hose 5 (5A-5C) Oil supply nozzle 6 (6A-6C) Nozzle hook 7 Display part 8 Main body housing 9 (9A, 9B) Refrigeration unit housing 10 (10A, 10B) Louver 11, 12 Discharge port 13 Discharge tube 20 Refrigeration unit 21 Vapor return tube 22 Compression pump 22a Compression side 22b Vacuum side 23 Separation unit 23a Condenser 23b Gas-liquid separation measuring tank 23c, 23d Adsorption tower 23e Cooling Port 24 Motor 25 Gasoline return valve 26 Switching valve 27 Check valve 28 Relief valve 29 Concentration meter 31 Oil supply pipe 32 Oil supply pump 32a Air separator 32b Float chamber 32c Overflow prevention valve 32d Outlet pipe 33 Electromagnetic valve 34 Flow meter 35 Safety joint 41 Sub tank 42 Coolant tank 43 Circulation pump 44 Flow Sensor 45 Temperature sensor 46 Coolant supply line 47 Coolant return line 48 Condenser 49 (49A, 49B) Air cooling fan 50 Solenoid valve 51 Compressor 52 (52A, 52B) Expansion valve 53 Plate heat exchanger 54, 55 Refrigerant line 61 Solid Vapor barrier 61a Horizontal plate portion 61b Vertical plate portion 61c Through hole 61d Cable clamp 61e Weld stud 61f Through hole 61g Bolt 61h Seal washer 62 Vapor barrier (weigher side vapor barrier)
65, 66 Introduction pipe 71 Dilution pipe 71a Base 71b Inflow port 71c Air inflow port 71d Discharge port

Claims (8)

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 near the fuel supply nozzle, a compression pump interposed in the vapor return pipe, a condenser for cooling the fuel oil vapor flowing through the vapor return pipe, and fuel oil liquefied by the condenser In a fuel supply apparatus comprising a vapor liquefaction recovery system comprising a gas / liquid separation measuring tank for collecting the gas and a separation unit comprising an adsorption tower for adsorbing fuel oil vapor from the gas / liquid separation measuring tank,
The oil supply apparatus, wherein the separation unit is cooled by a coolant from a refrigeration unit.   The oil supply device according to claim 1, wherein the separation unit is covered with a heat insulating material and a heat insulating cover.   When the outside air temperature is within a predetermined range, a predetermined amount of the coolant from the refrigeration unit circulates between the refrigeration unit and the separation unit and is cooled to a predetermined temperature range by the refrigeration unit. The oil supply apparatus according to claim 1 or 2, characterized by the above.   4. The fuel supply system and / or the vapor liquefaction recovery system is not driven until the cooling liquid is cooled to a predetermined temperature or less after the refrigeration unit is turned on. Refueling device.   The oil supply device according to any one of claims 1 to 4, wherein when the coolant exceeds a predetermined temperature, driving of the oil supply system and / or the vapor liquefaction recovery system is stopped. A relief valve provided in the exhaust pipe of the adsorption tower;
A concentration meter for measuring the vapor concentration of the exhaust of the relief valve,
6. The oil supply device according to claim 1, wherein when the measured value of the densitometer exceeds a predetermined value, the drive of the oil supply system and / or the vapor liquefaction recovery system is stopped. A relief valve is provided in the exhaust pipe of the adsorption tower,
The oil supply device according to claim 1, 2, 3, 5, or 6, wherein the refrigeration unit is always driven.   The oil supply apparatus according to claim 7, further comprising a dilution pipe that dilutes exhaust gas from the relief valve and discharges the exhaust gas to the atmosphere.