JP2015105105A - Fuel supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel supply device preventing lowering of an amount of liquid fuel supply after the occurrence of an earthquake.SOLUTION: A fuel supply device comprises: a fuel supply path connected to a storage tank in which liquid fuel is stored; a nozzle which is connected to the other end of the fuel supply path and supplies the liquid fuel to a fuel supplied body; a pump which is provided in the fuel supply path and supplies the liquid fuel of the storage tank to the nozzle; a filter provided in the fuel supply path on the upstream side of the pump; a flow meter measuring an amount of supply of the liquid fuel which is supplied to the nozzle by the pump; a bypass path which has one end connected to the fuel supply path on the upstream side of the filter and the other end connected to the fuel supply path on the downstream side of the one end; foreign matter removal means which is provided in the bypass path and removes foreign matter contained in the liquid fuel; and a selector valve which is provided in the fuel supply path and by which the fuel supply path is switched so that the liquid fuel is supplied to the foreign matter removal means of the bypass path.

Description

  The present invention relates to a fuel supply apparatus.

  For example, in a fuel supply device that supplies liquid fuel such as gasoline or light oil, the liquid fuel stored in a storage tank (underground tank) is pumped up and supplied via a fuel supply path (including piping, hoses, and nozzles). (For example, refer to patent documents 1). In addition to the pump, the pump unit incorporates a filter that removes foreign substances contained in the liquid fuel. Moreover, the comparatively small filter is used, for example, is periodically cleaned at the time of periodic inspection of the pump.

JP 2009-1113826 A

  In a storage tank in which liquid fuel is stored, foreign matter accumulates at the bottom of the tank, so that the liquid fuel that is usually pumped up by the pump contains almost no foreign matter. Therefore, the filter provided in the fuel supply path upstream of the pump for preventing the pump from being damaged by foreign matter is not clogged early in normal use.

  However, when vibration due to an earthquake propagates to the tank, a phenomenon occurs in which foreign matter accumulated at the bottom of the tank diffuses and floats in the liquid fuel in the tank. When the liquid fuel in the storage tank is pumped up by the fuel supply device, a large amount of foreign matter floating along with the liquid fuel is also pumped up. In that case, the filter provided in the fuel supply path is quickly clogged by a large amount of foreign matter separated from the tank bottom. As a result, the supply amount of the liquid fuel supplied to the fuel supply path decreases, so that not only the fuel supply time is extended, but also the filter is frequently cleaned and replaced.

  In addition, after the occurrence of a disaster such as an earthquake, the use of automobiles will become active as a means of transportation for transporting and recovering relief supplies, so regardless of the effect of a decrease in the amount of liquid fuel supplied due to clogging of the filter, There is a demand for efficient fuel supply to automobiles in a short time.

  Therefore, in view of the above circumstances, the present invention has an object to provide a fuel supply apparatus that solves the above-described problems.

  In order to solve the above problems, the present invention has the following means.

The present invention includes a fuel supply path connected to a storage tank in which liquid fuel is stored;
A nozzle connected to the other end of the fuel supply path for supplying liquid fuel to the fuel supply body;
A pump provided in the fuel supply path, for supplying liquid fuel in the storage tank to the nozzle;
A filter provided in the fuel supply path upstream of the pump;
A flow meter for measuring the amount of liquid fuel supplied to the nozzle by the pump;
A bypass path having one end connected to the fuel supply path upstream from the filter and the other end connected to the fuel supply path downstream from the one end;
Foreign matter removing means provided in the bypass path for removing foreign matter contained in the liquid fuel;
A switching valve that is provided in the fuel supply path and switches the fuel supply path so that the liquid fuel is supplied to the foreign matter removing means of the bypass path;
It is provided with.

  According to the present invention, when the earthquake occurs, the fuel supply path is switched so that the liquid fuel is supplied to the bypass path by the switching valve. Therefore, even if the foreign matter floating along with the liquid fuel is pumped up, the foreign matter is removed. It is possible to prevent a decrease in the amount of liquid fuel supplied due to clogging of the filter of the fuel supply path, which is removed by the means, and fuel can be efficiently supplied to the automobile even when an earthquake occurs.

1 is a schematic configuration diagram showing an embodiment of a fuel supply device according to the present invention. It is a figure which expands and shows the structure of a foreign material removal means. It is a flowchart for demonstrating the control processing which a control circuit performs. It is a flowchart for demonstrating the modification of the control processing which a control circuit performs.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

Embodiment 1
FIG. 1 is a schematic configuration diagram showing an embodiment of a fuel supply apparatus according to the present invention. As shown in FIG. 1, the fuel supply device 10 includes a fuel supply path 20, a switching valve 30, a bypass path 40, a pump unit 50, a flow meter 60, and an electromagnetic valve 70 inside a housing 12. A foreign matter removing means 80 and a control circuit 90. The pump unit 50 is provided with a pump, a gas-liquid separation chamber, a filter, an air separation chamber and the like in one casing. The pump filter 51 built in the pump unit 50 is formed by a fine filter so as to remove foreign matters having relatively small particles.

  Further, the housing 12 includes a seismic device (earthquake detection means) 100 and a speaker (notification means) 110. Further, a display device 120 is provided on the front surface of the housing 12, and a nozzle hook 130 is provided on the side surface of the housing 12.

  The fuel supply path 20 includes a first pipe 21 connecting the underground tank 140 and the switching valve 30, a second pipe 22 connecting the switching valve 30 and the pump unit 50, a pump unit 50, and a flow meter. A third pipe 23 that connects between the flowmeter 60, a fourth pipe 24 that connects between the flow meter 60 and the electromagnetic valve 70, a fifth pipe 25 connected to the electromagnetic valve 70, and a fifth pipe 25. The hose 26 is connected. The third pipe 23 is provided with a first pressure sensor (pressure detection means) 170 that detects a pressure detection value of the liquid fuel discharged from the pump unit 50. The first pressure sensor 170 detects a pressure (pump discharge pressure) P1 on the downstream side of the pump filter 51, and can monitor a decrease in the pressure of the liquid fuel that has passed through the pump filter 51.

  A nozzle 150 is connected to the tip of the hose 26. The nozzle 150 is hung on the nozzle hook 130 when not in use. When fuel is supplied to a fuel tank (fuel supply body) 160 of the vehicle, the discharge pipe 152 of the nozzle 150 removed from the nozzle hook 130 is inserted into the supply port 162 of the fuel tank 160. The nozzle hook 130 is provided with a nozzle switch 132 that is turned on when the nozzle 150 is present and is turned off when the nozzle 150 is detached.

  The switching valve 30 is a three-way solenoid valve provided in the fuel supply path downstream of the pump filter 51, and includes a port to which the first pipe 21 is connected, and b port to which the second pipe 22 is connected. And c port to which the bypass path 40 is connected.

  The bypass path 40 has a lower end (upstream one end) branched and connected to the c port of the switching valve 30, and an upper end (downstream side) branched and connected to the second pipe 22. Here, the switching valve 30 is configured to be automatically switched by an output signal from the seismic device 100 or the first pressure sensor 170. The upper end (the other end on the downstream side) of the bypass path 40 is connected to the fuel supply path 20 (second pipe 22) on the upstream side of the pump filter 51. Therefore, by switching the switching valve 30 to supply fuel to the bypass path 40, the liquid fuel is supplied to the bypass path 40 from the upstream position before being supplied to the pump unit 50. The bypass path 40 is provided with foreign matter removing means 80 that prevents the foreign matter contained in the liquid fuel from passing through and removes the foreign matter from the liquid fuel. A three-way solenoid valve (switching valve) may be disposed between the upper end (downstream side) of the bypass path 40 and the second pipe 22, or the three-way solenoid valve (switching) may be connected to the bypass path 40 or the second pipe 22. Valve) may be arranged. Further, the switching valve 30 may be a three-way solenoid valve or a manual three-way valve. When a manual three-way valve is used as the switching valve 30, an operator who has felt an earthquake may manually switch the three-way valve, or the speaker 110 notifies the speaker 110 that an earthquake has been detected. Thus, an operator who knows the occurrence of the earthquake with the speaker 110 immediately after the occurrence of the earthquake may manually switch the three-way valve.

  There may be a case where foreign matter W is deposited at the bottom of the underground tank (storage tank) 140. In normal times (before an earthquake occurs), the foreign matter W is not pumped with the liquid fuel, but when an earthquake occurs, the vibration caused by the earthquake propagates to the liquid, and the precipitated foreign matter W may float in the liquid fuel. There is a possibility that the foreign matter W is pumped up together with the liquid fuel.

  The switching valve 30 normally communicates the a port and the b port (before the occurrence of the earthquake), and connects the first pipe 21 and the second pipe 22. Then, the switching valve 30 is switched immediately after the occurrence of the earthquake, thereby connecting the a port and the c port and connecting the first pipe 21 and the bypass path 40. For this reason, the liquid fuel pumped from the underground tank 140 normally (before the occurrence of the earthquake) is supplied to the pump filter 51 and the pump unit 50 via the first pipe 21 and the second pipe 22. Further, when an earthquake occurs, the switching valve 30 is switched so as to communicate between the a port and the c port, so that the liquid fuel pumped through the first pipe 21 is bypassed before being supplied to the pump filter 51. To the foreign matter removing means 80. Then, the liquid fuel obtained by filtering the foreign matter W precipitated in the underground tank 140 by the foreign matter removing means 80 is supplied to the pump unit 50.

  As described above, when the earthquake occurs, the switching valve 30 is switched, so that the liquid fuel is supplied to the foreign matter removing means 80, and the foreign matter in the liquid fuel is removed by the foreign matter removing means. A decrease in the amount of liquid fuel supplied due to clogging of the pump filter 51 in the pump unit 50 due to the foreign matter W that has been kept is prevented.

  The control circuit 90 includes pressure monitoring means 210, switching valve control means 220, electromagnetic valve control means 230, flow rate calculation means 240, and pump control means 250. The pressure monitoring means 210 monitors the pressure detection value P2 detected by a second pressure sensor (pressure detection means) 180 provided downstream from the foreign matter removal means 80, and the supply pressure of the liquid fuel is preset. When the pressure drops below the predetermined value, a signal for notifying the pressure drop due to the foreign matter removing means 80 being clogged with the foreign matter is output. As a result, the worker can easily recognize that the foreign matter removing means 80 is at the replacement time.

  As a method of detecting that the foreign matter removing means 80 is clogged, when the second pressure sensor 180 is provided upstream from the foreign matter removing means 80, the supply pressure of the liquid fuel is set to a predetermined value. It may be detected and notified that the pressure has risen above the value, or pressure sensors are provided both upstream and downstream of the foreign matter removing means 80, and the foreign matter removing means 80 is determined from the pressure difference (pressure difference) between the upstream and downstream. May be detected and notified.

  The switching valve control means 220 outputs a switching signal to the switching valve 30 when the seismic device (earthquake detection means) 100 detects a vibration of a predetermined value or more when an earthquake occurs and receives the detection signal. As a result, the switching valve 30 is automatically switched so as to communicate the first pipe 21 and the bypass path 40 provided with the foreign matter removing means 80, and the liquid fuel pumped up from the underground tank 140 is removed by the foreign matter removing means 80. Filter and supply to the pump unit 50. Thereby, even when an operator forgets to operate the switching valve 30, the switching valve 30 can be switched reliably. Therefore, the liquid fuel immediately after the occurrence of the earthquake can be supplied to the foreign matter removing means 80 via the bypass path 40.

  The same applies when a switching signal is output to the switching valve 30 based on the pressure value P1 measured by the first pressure sensor 170. Specifically, the pump filter 51 is clogged when it is detected that the pressure P1 of the liquid fuel measured by the first pressure sensor 170 provided on the downstream side of the pump filter 51 is not more than a predetermined value. There is a possibility that the supply amount of liquid fuel due to will decrease. That is, if the supply through the current fuel supply path is continued, the pump filter 51 is clogged at an early stage due to foreign matters contained in the liquid fuel, so that the supply amount of the liquid fuel is expected to decrease. Therefore, since the foreign matter is removed by the foreign matter removing means 80 of the bypass path 40 by automatically switching the switching valve 30, the pump filter 51 provided downstream from the bypass path 40 is prevented from being clogged, and the pump A decrease in the amount of liquid fuel supplied due to clogging of the filter 51 can be prevented.

  When the nozzle detection signal from the nozzle switch 132 of the nozzle hook 130 is on, the electromagnetic valve control means 230 outputs a valve closing signal for closing the electromagnetic valve 70 and when the nozzle detection signal from the nozzle switch 132 is off. Outputs a valve opening signal for opening the electromagnetic valve 70.

  The flow rate calculation unit 240 calculates the instantaneous flow rate per unit time of the liquid fuel discharged from the nozzle 150 and the integrated flow rate (supply amount) by integrating the flow rate pulses transmitted from the flow rate pulse transmitter 62 of the flow meter 60. Then, the calculated numerical data is output to the display unit 120 to display the supply amount.

  The pump control unit 250 activates the pump motor 52 of the pump unit 50 when the nozzle detection signal from the nozzle switch 132 of the nozzle hook 130 is on, and supplies the pump motor 52 to the pump motor 52 when the nozzle detection signal is off. Stop the power supply.

  FIG. 2 is an enlarged view showing the configuration of the foreign matter removing means. As shown in FIG. 2, the foreign substance removing means 80 includes a cylindrical filter storage case (filter storage portion) 82 in which a multiple structure filter 84 is detachably stored, and a lid 83 of the filter storage case 82 is attached. By opening, it is a cartridge type from which the multi-structure filter 84 can be taken out. The multi-structure filter 84 has a configuration in which a plurality of metal mesh members 86 having different meshes are stacked, and a metal mesh member having a coarse mesh is arranged on the upstream side, and the metal becomes finer toward the downstream side. The mesh members 86 are arranged in stages.

  Further, since water has a specific gravity heavier than that of the oil liquid, it is sunk at the bottom of the underground tank 140. By providing a water-absorbing material or a water-repellent material that allows oil to permeate between the mesh members 86, the water floating from the bottom of the tank together with the foreign matter W in the underground tank 140 due to the earthquake is attracted by the suction force of the pump unit 50. It may be pumped up. In such a case, in the process in which the liquid fuel passes through the multi-structure filter 84 of the foreign matter removing means 80, the water in the liquid fuel is absorbed by the water absorbing material, or the water is repelled from the liquid fuel by the water repellent material. . Thereby, it can prevent supplying the liquid fuel which water mixed into the to-be-supplied body, and can supply more safely.

  Further, the multi-structure filter 84 is formed so that the filter filtration area is larger than the pipe diameters of the fuel supply path 20 and the bypass path 40 in order to ensure the flow rate when the liquid fuel passes. That is, the multi-structure filter 84 has a sufficiently large capacity compared to the filter built in the pump unit 50, and therefore, the multi-structure filter 84 is configured not to be clogged even when removing the foreign matter W that has settled in the underground tank 140. ing. Therefore, even when the foreign matter W precipitated at the bottom of the underground tank 140 due to the occurrence of the earthquake flows into the fuel supply path 20, the multi-structure filter 84 having a large capacity can effectively remove foreign matter having relatively large particles. Possible. Furthermore, since the multi-structure filter 84 is not easily clogged, it is possible to stably supply fuel after the occurrence of an earthquake.

  The lid 83 is attached to the outer periphery of the filter storage case 82 by a hinge 88 so that it can be opened and closed. When the cover is closed, the locking portion 89 is locked to the filter storage case 82 and the liquid fuel leaks. It is liquid tightly sealed to prevent it. Furthermore, since the multi-structure filter 84 has a cartridge structure in which a plurality of metal mesh members 86 are stacked, it can be easily cleaned or replaced during maintenance. In particular, when cleaning the pump filter 51 built in the pump unit 50 or replacing the pump filter 51, it is necessary to take out the pump filter 51 from the pump unit 50, which is troublesome. On the other hand, according to the first embodiment, since the multi-structure filter 84 having a cartridge structure is provided in the bypass path 40, maintenance such as replacement or cleaning can be easily performed. The multi-structure filter 84 is housed inside the filter housing case 82, but can be easily replaced in a short time by opening the lid 83.

[Control processing of control circuit 90]
FIG. 3 is a flowchart for explaining a control process executed by the control circuit. As shown in FIG. 3, the control circuit 90 checks whether or not the nozzle switch 132 is OFF in S11. When the nozzle 150 is removed from the nozzle hook 130 and inserted into the supply port 162 of the fuel tank 160 of the vehicle, the nozzle switch 132 is switched from on to off. In S11, when the nozzle switch 132 is switched from ON to OFF (in the case of YES), the process proceeds to S12, and the pump motor 52 is activated. Then, it progresses to S13 and the solenoid valve 70 is opened.

  In next S14, it is checked whether or not an earthquake detection signal is output from the seismoscope (earthquake detection means) 100. In S14, when an earthquake detection signal is output (in the case of YES), the process proceeds to S15, and a switching signal is transmitted to the switching valve 30. As a result, the switching valve 30 is switched so as to communicate between the a port and the c port, so that the liquid fuel pumped up from the underground tank 140 is supplied to the foreign matter removing means 80 in the bypass path 40. In this way, when the earthquake occurs, the switching valve 30 can be automatically switched to reliably supply the liquid fuel to the foreign matter removing means 80, so that the inconvenience of forgetting the switching operation immediately after the occurrence of the earthquake can be prevented. Therefore, the liquid fuel filtered by the foreign matter removing means 80 is supplied to the pump unit 50 after removing the foreign matter W precipitated in the underground tank 140.

  Thus, when the earthquake occurs, the liquid fuel filtered by the foreign matter removing means 80 is supplied to the pump unit 50, so that the pump filter 51 in the pump unit 50 by the foreign matter W that has settled on the bottom of the underground tank 140 is used. A decrease in the amount of liquid fuel supplied due to clogging is prevented. As a result, it is possible to stably supply fuel to vehicles that perform recovery activities after an earthquake.

  In the next S16, it is checked whether or not a predetermined time set in advance has elapsed. The predetermined time can be set to an arbitrary time. For example, the predetermined time is based on the time required until the switching valve 30 is switched and the liquid fuel is filtered by the foreign matter removing means 80 and supplied to the pump unit 50. Is set. In S16, it will be in a standby state until a predetermined time elapses. If the predetermined time has elapsed in S16 (YES), the process proceeds to S17. In S17, the flow rate pulse transmitted from the pulse oscillator 62 of the flow meter 60 is integrated to calculate the flow rate (supply amount), and the liquid fuel supply pressure P2 detected by the second pressure sensor 180 (foreign matter removing means). Read the pressure of the liquid fuel that has passed through.

  Subsequently, the process proceeds to S18, where the supply pressure of the liquid fuel detected by the second pressure sensor 180 provided downstream from the multiple structure filter 84 (the pressure detection value discharged from the multiple structure filter 84) is set in advance. It is checked whether or not it is smaller than a predetermined pressure value (threshold value). In S18, when the supply pressure P2 of the liquid fuel detected by the second pressure sensor 180 (pressure downstream of the multiple structure filter 84) is larger than a predetermined pressure value (threshold value) set in advance (in the case of NO), multiple It is determined that there is no possibility that the supply amount of the liquid fuel is reduced due to the clogging of the structural filter 84, and the process proceeds to S19 to check whether the nozzle switch 132 is turned on.

  Further, in S14, when an earthquake detection signal is not output from the seismic device (earthquake detection means) 100 (in the case of NO), the flow proceeds to S22, and the flow rate pulse transmitted from the flow rate pulse transmitter 62 of the flow meter 60 is integrated. Then, the instantaneous flow rate per unit time and the integrated flow rate (supply amount) of the liquid fuel discharged from the nozzle 150 are calculated. Subsequently, in S23, the numerical data of the integrated flow rate (supply amount) obtained by calculating the flow rate pulse is output to the display unit 120 to display the supply amount. After this, the process proceeds to S19, where it is checked whether the nozzle switch 132 is turned on.

  In S19, when the nozzle switch 132 is ON (in the case of YES), it is determined that the nozzle 150 is returned to the nozzle hook 130 and the fuel supply has been completed, the solenoid valve 70 is closed in S20, and the pump motor in S21. 52 is stopped. In S19, when the nozzle switch 132 is off (in the case of NO), it is determined that fuel is still supplied, and the process returns to S14, and the processes in S14 to S19 are repeated.

  In S18, when the supply pressure of liquid fuel (pressure downstream of the multi-structure filter 84) detected by the second pressure sensor 180 is smaller than a predetermined pressure value (threshold value) set in advance (in the case of YES). In S24, the speaker (notification unit) 110 reports a message such as “foreign matter removing unit 80 is clogged and fuel cannot be supplied normally”. As a result, foreign matter is accumulated in the multi-structure filter 84 and the filtration performance is lowered, and it is understood that it is time for the operator to replace or clean the multi-structure filter 84.

Thereafter, the solenoid valve 70 is closed in S20, and the pump motor 52 is stopped in S21.
Further, by stopping the fuel supply in S20 and S21, it is possible to prevent the pump unit 50 from being overloaded.

  Moreover, in the said embodiment, although the structure which provided the seismic device 100 in the inside of the housing | casing 12 was shown as an example, it is not restricted to this, For example, the seismic device 100 is outside the housing | casing 12 (for example, office Etc.) and an earthquake detection signal from the seismic device 100 may be transmitted to the control circuit 90 by radio. Alternatively, the switching valve 30 can be automatically switched when earthquake information is received on the Internet or an emergency earthquake broadcast for radio or television. An operator who knows that an earthquake has occurred may manually switch the switching valve 30.

[Modification]
FIG. 4 is a flowchart for explaining a modification of the control process executed by the control circuit. In FIG. 4, the same processes as those in the flowchart of FIG.

  In this modification, the upper end (downstream end) of the bypass path 40 is connected to the downstream side of the pump filter 51. As a result, the liquid fuel filtered by the multiple structure filter 84 of the foreign matter removing means 80 can be directly supplied to the pump without passing through the pump filter 51. A first pressure sensor 170 is provided on the upstream side of the pump filter 51, and a second pressure sensor 180 is provided on the downstream side.

  After opening the electromagnetic valve 70 in S13, the process proceeds to S13a, where the pump discharge pressure P1 detected by the first pressure sensor 170 is measured. In S14a, the pump discharge pressure P1 and a preset predetermined pressure value P1a are measured. If P1 <P1a (if YES), it is determined that there is a possibility that the pump filter 51 is clogged and the pump discharge pressure is lowered and the liquid fuel supply amount is lowered, and the process proceeds to S15. The processes of S15 to S21 described above are executed. That is, the liquid fuel pumped up from the underground tank 140 by switching the switching valve 30 is supplied to the bypass path 40 in the same manner as when the seismic device 100 detects the earthquake, and the foreign matter removing means 80 does not pass through the pump filter 51. The liquid fuel filtered by the multi-structure filter 84 is supplied to the pump of the pump unit 50.

  In S14a, when P1> P1a (in the case of NO), the processing in S22 and s23 described above is executed. In S19, in the case where the nozzle switch 132 is off (in the case of NO), the above-described S13a to S14a, The processing of S22, S23, 19 (normal fuel supply processing) is executed.

  In S14a, the pump discharge pressure P1 detected by the first pressure sensor 170, and the pressure P2 (pump suction pressure) detected by the second pressure sensor 180 provided upstream of the pump filter 51 For example, it may be checked whether or not the pressure difference ΔP of P2−P1 is equal to or less than a preset threshold value. In this case, when the pressure difference ΔP is equal to or smaller than the threshold value, it is determined that the pump filter 51 may be clogged and the liquid fuel supply amount may be reduced, and the switching valve 30 is connected to the a port and the c port. Switch to Therefore, the liquid fuel pumped up from the underground tank 140 is supplied to the foreign matter removing means 80 in the bypass path 40.

  Further, the second pressure sensor 180 may detect the pressure on the downstream side of the foreign matter removing means 80 (the upper end side of the bypass path 40) or the upstream side of the foreign matter removing means 80 (the lower end side of the bypass path 40). The pressure may be detected.

  The notification means is not limited to the speaker 110, and for example, the above message may be displayed on a monitor.

  Moreover, although the pump filter 51 of the said embodiment showed the structure incorporated in the pump unit 50 as an example, it is not restricted to this, It is good also as a structure which provided only the filter 51 in the fuel supply path | route 20. FIG. In this case, by providing the bypass path 40 so as to bypass the upstream side of the pump filter 51 or between the upstream side and the downstream side of the pump filter 51, the switching valve 30 is automatically switched in the event of an earthquake to ensure that the liquid fuel is in a foreign matter. Since it can be supplied to the removing means 80, the amount of liquid fuel supplied by preventing the foreign matter W precipitated in the underground tank 140 from being supplied to the pump filter 51 and clogging the pump filter 51 is reduced. Can be prevented.

Moreover, in the said embodiment, although the structure which provided the bypass path 40 in the fuel supply path 20 which pumps up the liquid fuel stored in the underground tank 140 was mentioned as an example, it is not restricted to this, Tanks other than an underground tank (on the ground) Of course, the present invention can also be applied to the case where liquid fuel stored in a tank installed is supplied to another tank.
Moreover, although the 1st pressure sensor 170 of the said embodiment was provided in the downstream of the pump filter 51, you may provide not only in this but in the upstream of the pump filter 51. FIG. Then, when the pressure of the liquid fuel is equal to or higher than a predetermined value, the switching amount of the switching valve 30 may be automatically switched because there is a possibility that the supply amount of the liquid fuel is reduced due to the clogging of the pump filter 51.

  When a pair of pressure sensors are provided upstream and downstream of the pump filter 51, the switching valve 30 may be automatically switched based on the pressure difference (pressure difference) between the upstream and downstream.

DESCRIPTION OF SYMBOLS 10 Fuel supply apparatus 12 Case 20 Fuel supply path 21 1st piping 22 2nd piping 23 3rd piping 24 4th piping 25 5th piping 26 Hose 30 Switching valve 40 Bypass path 50 Pump unit 51 Pump filter 52 Pump motor 60 Flow volume Total 62 Flow rate pulse transmitter 70 Solenoid valve 80 Foreign matter removing means 82 Filter housing case (filter housing portion)
83 Lid 84 Multi-structure filter 86 Metal mesh member 90 Control circuit 100 Seismic detector (earthquake detection means)
110 Speaker (notification means)
120 Display 130 Nozzle bracket 132 Nozzle switch 140 Underground tank 150 Nozzle 160 Fuel tank (fuel supply body)
170 1st pressure sensor (pressure detection means)
180 Second pressure sensor (pressure detection means)
210 Pressure monitoring means 220 Switching valve control means 230 Electromagnetic valve control means 240 Flow rate calculation means 250 Pump control means

Claims (5)

A fuel supply path connected to a storage tank in which liquid fuel is stored;
A nozzle connected to the other end of the fuel supply path for supplying liquid fuel to the fuel supply body;
A pump provided in the fuel supply path, for supplying liquid fuel in the storage tank to the nozzle;
A filter provided in the fuel supply path upstream of the pump;
A flow meter for measuring the amount of liquid fuel supplied to the nozzle by the pump;
A bypass path having one end connected to the fuel supply path upstream from the filter and the other end connected to the fuel supply path downstream from the one end;
Foreign matter removing means provided in the bypass path for removing foreign matter contained in the liquid fuel;
A switching valve that is provided in the fuel supply path and switches the fuel supply path so that the liquid fuel is supplied to the foreign matter removing means of the bypass path;
A fuel supply device comprising: An earthquake detection means for detecting an earthquake occurrence;
Control means for switching and controlling the switching valve so that the liquid fuel is supplied to the bypass path when an earthquake detection signal indicating that an earthquake has occurred is output from the earthquake detection means;
The fuel supply device according to claim 1, further comprising: Pressure detecting means for measuring the pressure on either the upstream side or the downstream side of the filter, or both;
Control means for switching and controlling the switching valve so that the liquid fuel is supplied to the bypass path based on the pressure measured by the pressure detection means;
The fuel supply device according to claim 1, further comprising: The foreign matter removing means includes
A filter that prevents the passage of foreign substances in the process of passing the liquid fuel;
A filter storage section for storing the filter,
The fuel supply device according to claim 1, wherein the filter is detachably stored in the filter storage portion. Pressure detecting means for measuring the pressure of the foreign matter removing means;
Informing means for informing that the foreign substance removing means is clogged based on the detected pressure value detected by the pressure detecting means,
The fuel supply device according to any one of claims 1 to 4, further comprising:

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