KR101114971B1 - Oil supplying apparatus - Google Patents

Abstract

The present invention is to provide a refueling device that can secure the ground circuit of the oil supply nozzle and the oil supply hose to prevent the risk of fire accidents due to static electricity. To this end, the oil supply apparatus of the present invention includes a grounded housing 2, a ground wire 16 protruded from an oil supply hose 7 connected to the housing 2, and a projection 18 connected to the ground wire 16. A ground circuit (17) consisting of: a contact (12) connected to the projection (18) of the oil supply nozzle (9), and the contact point (12) is provided with a nozzle (10). Is connected to the ground decision unit 21, and a notifier 15 which operates as an output of the ground decision unit 21 is provided.

       Lubrication device, ground circuit, protrusion, contact, slit, ground judgment part, alarm

Description

Oil supply device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply apparatus for supplying fuel oil to automobiles and the like in a gas station.

Fuel oil is highly flammable, and static electricity that is charged to the human body and static electricity generated during lubrication may cause sparks and cause a fire. Therefore, in the prior art, the oil supply nozzle and the oil supply hose are grounded, the static electricity that is charged to the human body and the static electricity generated during the oil supply are flowed to the ground to ensure the safety of oil supply (see Patent Document 1).

However, in the use of the oil supply device, the ground wire connected to the oil supply hose is disconnected, or contact defects due to rust or abrasion occur at the rotary joint part, and the conductivity of the ground circuit becomes incomplete, which causes static electricity to flow into the ground. There is a danger of not being fully performed. In such a case, the worker at the gas station wears work clothes that are difficult to charge with static electricity, and receives safety measures and safety education relatively thoroughly. However, in self-service gas stations, there is a problem that the risk of static electricity is high because customers who do not receive safety measures and safety education directly refuel.

[Patent Document 1] Japanese Patent Laid-Open No. 9-286499

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an oil supply device that can secure a ground circuit of an oil supply nozzle and an oil supply hose and can prevent a risk of fire accident due to static electricity.

The oil supply apparatus of the present invention sandwiches the pump 4 and the flow meter between the oil supply pipe 3 connected to the oil storage tank, and the oil supply nozzle (3) at the tip of the oil supply hose 7 connected to the oil supply pipe 3. In the oil supply device (1) provided with (9), a grounded housing (2), a ground wire (16) connected to the housing (2) and connected to an oil supply hose (7), and the ground wire (16). A ground circuit (17) consisting of the connected oil supply nozzle (9) and a projection (18) adapted to be connected to the ground wire (16) provided in the oil supply nozzle (9) is provided, and the nozzle hook (10) is provided with the oil supply nozzle. A contact 12 is provided which is connected to the projection 18 of 9, and the contact 12 is connected to the ground plate end 21 of the control device 13, and to the output of the ground plate 21. A working alarm 15 is provided (claim 1).

In addition, the ground determination unit 21 is provided with a resistance value measuring means 25, and the resistance value measuring means 25 has a switch 29 and a reference resistor 30 interposed between the DC power supply 28. It is composed of a grounded contact 12 and a resistance value calculation circuit 31 for calculating the resistance of the ground circuit 17, the oil supply nozzle 9 is caught by the nozzle hanger 10, the projection 18 is the contact 12 It is preferable that the switch 29 is closed when connected to the resistor 29 so that the resistance value calculating circuit 31 has a function of calculating the resistance value of the ground circuit 17 (claim 2).

In addition, the ground determination unit 21 is provided with a notification determination means 27, the notification determination means 27 has a function of operating the alarm 15 when the resistance value of the ground circuit 17 is a predetermined value or more. It is preferred (claim 3).

In addition, the nozzle hanger 10 is formed with a slit 19, and the projection 18 provided in the oil supply nozzle 9 has a slit 19 when the oil supply nozzle 9 is hooked on the nozzle hanger 10. Is connected to the contact point 12 (claim 4).

Here, the contact 12 is disposed so as to surround the slit 19 of the nozzle hanger 10, the contact 12 is preferably divided into two by the slit 19 (claim 5).

Moreover, it is preferable that the width | variety (width in the left-right direction in FIG. 3) of the said slit 19 is set to the dimension which a human finger does not enter (claim 6).

According to the present invention, the grounding circuit check of the oil supply nozzle and the oil supply hose is automatically performed, and when the ground is incomplete, the alarm is automatically alarmed, so that the oil supply device ensuring the safety of the oil supply operation can be provided.

Accordingly, the effects of the present invention are as follows.

(1) Lubrication is safe because the grounding circuits of the oil supply nozzle and the oil supply hose are secured.

(2) Since the ground circuit is checked automatically, safety is ensured.

(3) If the ground circuit is abnormal, an alarm is issued. Therefore, prompt repair is promoted and safety of oil supply is secured.

(4) Since the contact point of the resistance value measuring means is provided in the slit of the nozzle hanger, the lubrication nozzle projection is securely connected.

In the present invention, the nozzle hanger 10 is provided with a slit 19 into which the projections 18 are inserted, and a contact 12 arranged to be divided into two in the slit 19 (claim 5), Even if foreign matters including dust and garbage enter the contact point 12, they are discharged through the slit 19. Therefore, the electrical contact between the protrusion 18 and the contact 12 is prevented by the foreign matter.

According to the present invention, the width of the slit 19 into which the projection 18 of the oil supply nozzle 9 formed in the nozzle hanger 10 is inserted (the width in the left and right directions in FIG. 3) is held by a human finger. Since it is set to the width | variety which does not go (claim 6), the operator's finger of the oil supply nozzle 9 is pinched by the slit 19, and the said electric shock is prevented. At the same time, it is possible to protect the contact 12.

EMBODIMENT OF THE INVENTION Embodiment of this invention is described with reference to the accompanying drawings below.

1 shows a schematic view of the oil supply apparatus of the present invention.

1, the oil supply pipe 3 connected to the oil storage tank not shown is arrange | positioned in the housing 2 of the oil supply apparatus 1, and the pump 4 and the flowmeter 5 in the middle of the oil supply pipe 3 are shown. ) Is installed. An oil supply hose 7 is connected to the oil supply pipe 3 with the rotary joint 6 interposed therebetween, and an oil supply nozzle 9 is provided at the distal end of the oil supply hose 7 with the rotary joint 8 interposed therebetween.

The oil supply nozzle 9 is hung on the nozzle hanger 10 provided in the housing 2 except for oil supply, and the nozzle hanger 10 is provided with a nozzle switch 11 and a contact 12. The ON / OFF signal of the nozzle switch 11 and the flow rate signal of the flow meter 5 are input to the control device 13. The drive signal is output from the control device 13 to the pump 4, and the oil supply amount display signal is output to the indicator 14. The contact point 12 of the nozzle hanger 10 is also connected to the control device 13. In addition, a notifier 15 actuated by the operation signal of the control device 13 is installed in the oil supply device (1).

As shown in FIG. 2, a ground wire 16 is disposed in the oil supply hose 7, and one end of the ground wire 16 is grounded with the rotary joint 6 and the housing 2 interposed therebetween, and the ground wire 16 is disposed. The other end of is connected to the oil supply nozzle 9 with the rotary joint 8 interposed therebetween. Therefore, the oil supply nozzle 9, the rotary joint 8, the ground wire 16, the rotary joint 6, and the housing 2 constitute the grounding circuit 17 of the oil supply nozzle 9 and the oil supply hose 7. do. The oil supply nozzle 9 is provided with a projection 18 connected to the ground circuit 17.

As illustrated in FIG. 3, the nozzle hanger 10 is provided with a slit 19 into which the protrusion 18 is inserted, and a contact 12 is provided as if the slit 19 is wrapped. In other words, since the contact point 12 is arranged so as to be divided into two (or divided into two) in the slit 19, even if dust, garbage, or other foreign matter enters the contact point 12, the slit 19 Since it falls through and discharges through), it is prevented that the electrical contact between the protrusion 18 and the contact point 12 is prevented by the foreign matter. In addition, the finger of the operator of the lubricating nozzle 9 is caught in the slit 19 to prevent the worker from being shocked and to protect the contact 12. The width in the left and right directions is set so that a human finger cannot enter.

In FIG. 4, the control apparatus 13 has the oil supply control part 20 and the ground determination part 21. As shown in FIG. The oil supply control unit 20 has a function of driving the pump 4 by receiving an ON signal from the nozzle switch 11. At the same time, the oil supply control unit 20 has a function of receiving the flow rate signal of the flow meter 5 and outputting the oil supply amount display signal to the indicator 14. The ground judging portion 21 includes oil supply amount storage means 22 for storing the oil supply amount, drive time storage means 23 for storing the drive time of the pump 4, and oil supply frequency storage means for storing the oil supply frequency. (24), resistance value measuring means (25) for measuring the resistance value of the ground circuit (17), measurement result storage means (26) and a reminder (15) for storing measurement results of the resistance value measuring means (25). It is provided with a notification judging means 27 for determining the operation of the).

As is apparent from the circuit of the resistance value measuring means 25 shown in FIG. 5, the resistance value measuring means 25 includes a DC power source 28, a switch 29, a reference resistor 30, a contact point 12, and a resistance value. It has a calculation circuit 31. In the resistance measurement means 25 shown in FIG. 5, the oil supply nozzle 9 is caught by the nozzle hanger 10, and the projection 18 of the oil supply nozzle 9 is in contact with the contact point 12 of the nozzle hanger 10. The switch 29 is configured to close at the time. When the switch 29 is closed, the resistance value calculating circuit 31 is configured to calculate the resistance value of the ground circuit 17 from the voltage drop amount.

Next, the oil supply operation by the oil supply device 1 mentioned above is demonstrated.

At the opening of the gas station, the worker of the gas station turns on a power not shown. When a car visits a gas station for refueling and performs a refueling operation (a worker at the gas station, or a car occupant in the case of self refueling), the fuel nozzle 9 is removed from the nozzle rack 10, and a nozzle switch ( The ON signal of 11) is input to the control device 13. The oil supply nozzle 9 is inserted into the oil supply port of the vehicle by the person who performs the oil supply operation. The oil supply control part 20 of the control apparatus 13 which received the ON signal of the nozzle switch 11 drives the pump 4, and starts oil supply. When the pump 4 is driven and oil supply is started, the flow rate signal of the flow meter 5 is calculated by the oil supply control unit 20 and the oil supply amount is displayed on the indicator 14. When the lubrication is finished, the person who has performed the lubrication operation attaches the lubrication nozzle 9 to the nozzle rack 10 again. When the oil supply nozzle 9 is caught by the nozzle hanger 10, the OFF signal is sent from the nozzle switch 11, and the oil supply control unit 20 which receives the OFF signal stops the driving of the pump 4.

With reference to the flowchart of FIG. 6, operation | movement of the ground determination part 21 in the oil supply operation mentioned above is demonstrated. Prior to the opening of the gas station, it is determined whether the power is turned on or not (step ST1), and when the power is turned on (step ST1 is YES), the oil supply nozzle 9 is peeled off from the nozzle hanger 10 and the nozzle It is judged whether or not the ON signal is input to the control device 13 from the switch 11 (step ST2).

When the lubrication nozzle 9 is applied to the nozzle hanger 10 and an ON signal is input from the nozzle switch 11 to the control device 13 (step ST2 is NO), it is in the first control cycle of the day. (Step ST3), when in the initial control cycle on that day (step ST3 is YES), the resistance value measurement of the ground circuit 17 is performed by the resistance value measuring means 25 ( Step ST4). In step ST4, the switch 29 of the resistance value measuring means 25 is closed, and the resistance value calculating circuit 31 calculates the resistance value of the ground circuit 17 from the voltage drop amount.

Then, it is judged whether or not the resistance value of the ground circuit 17 calculated in step ST4 is equal to or less than a predetermined value (step ST5). If the resistance value of the ground circuit 17 is equal to or less than the predetermined value (step ST5 is YES), the ground circuit 17 is judged to be normal and stored in the measurement result storage means 26 as "normal" (step ST6). ). Then, the process returns to step ST1.

When the calculated resistance value of the ground circuit 17 is larger than the predetermined value (step ST5 is NO), it is judged whether or not the resistance value is within a predetermined range (step ST7). If the resistance value of the ground circuit 17 is within a certain range (step ST7 is YES), it is determined that the ground is defective, and the measurement result storage means 26 stores the fact that "the ground circuit is defective" ( Step ST8), the process returns to step ST1.

If the calculated resistance of the ground circuit 17 is out of a predetermined range (above a certain range of numerical values) (step ST7 is NO), the alarm circuit 15 is operated by determining that the ground circuit 17 is abnormal. The oil supply is made impossible (step ST9). By promptly notifying the staff of the gas station that the ground circuit 17 is abnormal by operating the alarm 15 and making it impossible to refuel, the ground circuit 17 is checked, repaired and other necessary processing.

When step ST2 is NO and step ST3 is YES, the nozzle hanger is performed in step ST2 after the ground circuit 17 is checked (steps ST3 to ST8). The ON signal is output from 10 and the oil supply is performed by the function of the oil supply control unit 20 (step ST10). When the oil supply is finished and the oil supply nozzle 9 is hung on the nozzle hanger 10, When the nozzle switch 11 is turned OFF and the step ST2 is NO, the process (the procedure below the step ST3) is executed.

The oil supply amount at the time of refueling in step ST10 is stored in the oil supply amount storage means 22. The drive time of the pump 4 at the time of refueling step ST10 is stored in the drive time storage means 23. In addition, the number of times the oil supply in step ST10 has been executed is stored in the oil supply frequency storage means 24. If it is not the first control cycle in the morning at step ST3 (step ST13 is NO), at step ST11, whether the oil supply amount stored in the oil supply amount storage means 22 has become a certain amount or not. Judge. When the oil supply amount stored in the oil supply amount storage means 22 is constant (step ST11 is YES), the process proceeds to step ST4, and the resistance value of the ground circuit 17 is obtained by the resistance value measuring means 25. Is measured, and the following steps ST5 are executed. If the oil supply amount stored in the oil supply amount storage means 22 is not a fixed amount (step ST11 is NO), whether or not the drive time of the pump 4 stored in the drive time storage means 23 has become a constant time or not. (Step ST12).

When the drive time of the pump 4 stored in the drive time storage means 23 has reached a predetermined time (step ST12 is YES), the process proceeds to step ST4, and the resistance value measuring means 25 The resistance value of the ground circuit 17 is measured, and the following steps ST5 are executed. If the driving time of the pump 4 is not a fixed time (step ST12 is NO), it is determined whether or not the number of refueling times stored in the refueling frequency storage means 24 has reached a predetermined number (step ST13). .

If the lubrication frequency stored in the lubrication frequency storage means 24 has reached a certain number of times (step ST13 is YES), the flow advances to step ST4, and the resistance value of the ground circuit 17 is controlled by the resistance value measurement means 25. Is measured and the following steps ST5 are executed. If the number of times of lubrication is not fixed (step ST13 is NO), the flow returns to step ST2. Then, the process following step ST2 is repeated.

Next, the operation of the notification control means 27 will be described based on the flowchart of FIG. In step ST21 of FIG. 7, it is determined whether the number of defects stored in the measurement result storage means 26 is 3 to 5 times (within the first range) within the past 10 measurement results, for example. (Step ST21). When the number of defects stored in the measurement result storage means 26 is within the first range (in the past 10 measurement results, 3 to 5 times) (step ST21 is YES), the lamp of the alarm 15 Lights up (step ST22), and prompts the staff of the gas station to repair.

If the number of defects stored in the measurement result storage means 26 is not within the first range (step ST21 is NO), the flow advances to step ST23, and the defects stored in the measurement result storage means 26 are performed. It is determined whether the number of times is, for example, six or seven times (within the second range) in the past 10 measurement results. If the number of defects stored in the measurement result storage means 26 falls outside the first range and falls within the second larger range (in the past 10 measurement results, 6 or 7 times) (step ST23 is YES) The lamp of the alarm 15 flashes (step ST24), prompting the staff of the gas station to promptly repair it.

If the number of defects stored in the measurement result storage means 26 is not within the second range (step ST23 is NO), the process proceeds to step ST25, and the past 10 stored in the measurement result storage means 26 is performed. It is determined whether or not the number of times of meeting failure is, for example, more than eight times (in the third range larger than the second range) in the past ten measurement results. If the number of failures stored in the measurement result storage means 26 is within the third range (step ST25 is YES), the lamp of the alarm device 15 blinks to render it impossible to refuel (step ST26). By the notification (step ST26) by the notifier 15, a failure of the ground circuit 17 of the oil supply device 1 is determined, prompt repair is promoted, and the safety of the oil supply device 1 is secured. If the number of defects stored in the measurement result storage means 26 is not within the third range (less than eight times in the past ten measurement results: Step ST25 is YES), the following processes are repeated.

In the flowchart of FIG. 7, when a plurality of times (for example, 10 times) are measured, a notification is given when a certain number of times is bad. On the other hand, it is possible to be configured to have a function of notifying when only a predetermined number of times in succession are defective. The flowchart of FIG. 8 has shown the control state at the time of such "notifying in case of continuous and multiple defects."

In Fig. 8, in step ST31, it is determined whether or not the occurrence of " badness " stored in the measurement result storage means 26 is five times in succession (first continuous number of times). If the occurrence of " badness " stored in the measurement result storage means 26 is the first continuous number (five times) (step ST31 is YES), the lamp of the alarm device 15 is turned on (step ST32). ), The staff of the gas station are urged to repair.

If the occurrence of " badness " stored in the measurement result storage means 26 is not the first continuous number (five times) (step ST31 is NO), the process proceeds to step ST33, where the measurement result storage means ( It is judged whether or not the number of defects stored in 26 is, for example, eight consecutive times (a second continuous number larger than the first continuous number), and the number of defects stored in the measurement result storage means 26. If is the second consecutive number of times (8 times) (step ST33 is YES), the lamp of the alarm device 15 blinks (step ST34) to promptly repair.

If the number of defects stored in the measurement result storage means 26 is not the second consecutive number (eight times) (step ST33 is NO), the procedure proceeds to step ST35, and the measurement result storage means 26 ) Is judged whether or not the number of defects stored in the memory is 10 (the third consecutive number larger than the second continuous number), etc. The number of defects stored in the measurement result storage means 26 is the third time. If the number of times (10 times) is continuous (step ST35 is YES), the lamp of the alarm device 15 blinks to disable oil supply (step ST34). By this (step ST36), the failure of the ground circuit 17 of the oil supply device 1 is detected, prompting a quick repair, and ensuring the safety of the oil supply device 1. The measurement result storage means 26 If the number of defects stored in the memory is not the third consecutive number (10 times) (step ST35 is NO), the following processes are repeated.

The embodiment shown is an illustration to the last, and adds that it is not a description which limits the technical scope of this invention.

1 is a schematic diagram of an oil supply device according to an embodiment of the present invention.

Figure 2 is a side view of the oil supply nozzle and nozzle hanger

3 is a cross-sectional view of the nozzle hanger

4 is a block diagram of a control device;

5 is a circuit diagram of a resistance value measuring means;

6 is a flowchart showing the control mode of the ground determination unit.

7 is a flowchart showing a control form of the notification determining means.

8 is a flowchart showing another control mode of the notification determining means.

[Description of Drawing Reference]

       1: Lubrication device 2: Housing

       3: oil supply pipe 4: pump

       5: flow meter 6, 8: rotary joint

       7: Oil supply hose 9: Oil supply nozzle

      11: nozzle switch 12: contact

      13 control device 14 indicator

      15: alarm 16: ground wire

      17: ground circuit 18: projection

      19: slit 20: oil supply control unit

      21: ground determination portion 22: oil supply storage means

      23: driving time storage means 24: lubrication frequency storage means

      25: resistance value measuring means 26: measurement result storage means

      27: determination unit 28: DC power

      29 switch 30 reference resistance

      31: resistance value calculation circuit

Claims (6)

An oil supply apparatus in which a pump and a flow meter are installed in the middle of an oil supply pipe connected to an oil storage tank, and an oil supply nozzle is installed at the tip of the oil supply hose connected to the oil supply pipe, wherein the oil supply is connected to the housing and the oil supply is connected to the housing. A grounding circuit composed of a grounding wire that is extended to the hose, a fueling nozzle connected to the grounding wire, and a protrusion connected to the grounding wire provided on the oiling nozzle is provided, and a nozzle hook is provided with a contact point connected to the protrusion of the oiling nozzle. The contact point is connected to the ground judging portion of the control device, and installs an alarm operated by the output of the ground judging portion, wherein a slit having a width dimension that does not allow a human finger to enter is formed through the nozzle hanger. The protrusion provided on the oil supply nozzle is configured to be inserted into the slit when the oil supply nozzle is hooked on the nozzle hanger. The contact is arranged to surround the slit of the nozzle group and the hook, the contact lubrication unit, characterized in that installed in the divided state into two in the slit. A resistance value measuring means is provided in the ground judging part, and the resistance value measuring means calculates a resistance value of a contact point and a ground circuit connected to a DC power source with a switch and a reference resistance interposed therebetween. And a lubrication nozzle, wherein the lubrication nozzle is caught by a nozzle holder, and the switch is closed when the protrusion is connected to the contact point, so that the resistance value calculation circuit has a function of calculating a resistance value of the ground circuit. . The oil supply apparatus according to claim 1 or 2, wherein the ground determination unit is provided with a notification determination means, and the notification determination means has a function of operating a notification device when the resistance of the ground circuit is greater than or equal to a predetermined value. delete delete delete

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