KR100544027B1 - Portable gas charging device - Google Patents

Abstract

The present invention is to provide a mobile gas filling device that can be charged without leaving the gas in the bomb as possible in a short time as possible.

Mobile gas filling device of the present invention for this purpose is the primary cylinder 4, the pressure accumulating the gas, the boosting device 5 connected to the primary cylinder 4 by the pipe 8, and opening and closing the boosting device (5) Filling device connected by secondary cylinder 6 connected by pipe 9 between valve 10 and pipe 12 between opening and closing valve 13 between secondary cylinder 6 (7) and a charging nozzle 17 connected to the charging device 7 through the charging hose 16 are mounted on the truck 2, and the control unit 19 of the charging device 7 is an open / close valve 10 ) By driving the booster device 5 to pressurize the gas in the primary cylinder 4 to supplement and accumulate the secondary cylinder 6, and to open and close the valve 13 to fill the gas in the secondary cylinder 6. It is sent to the charging nozzle 17 through the device 7 and the charging amount charged from the charging nozzle 17 is calculated and displayed on the indicator 31.

Mobile gas filling device, primary cylinder, secondary cylinder, booster, filling device

Description

Portable gas charging device

1 is a side view of a mobile gas filling apparatus of the present invention

2 is a block diagram of a mobile gas filling device

3 is a front view of a charging device of the mobile gas filling device;

4 is a block diagram centering on a control unit of a mobile gas filling apparatus;

5 is a flowchart showing an aspect of control of filling gas into a vehicle;

Fig. 6 is a flowchart showing an aspect of control to replenish and accumulate gas into the secondary boom.

※ Explanation of codes for main parts of drawing

1: mobile gas filling device 2: truck

3: loading box 4: primary bomb

5: booster 6: secondary cylinder

7: filling device 8, 9, 12, 15: pipe

10,13,14: opening and closing valve 11: measuring unit

16: charging hose 17: charging nozzle

18,21: pressure sensor 19: control unit

20: safety valve 22: operation panel

23: Tenkey 24: operation indicator

25: start switch 26: stop switch

27: emergency stop switch 28: notifier

29: currency input 30: printer

31: indicator 32: case

33: gas sensor 34: vent pipe

35 side brake 36 ignition switch

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile gas filling apparatus for high pressure gas, such as hydrogen gas and natural gas, which has been put to practical use as a fuel for automobiles.

Hydrogen gas, natural gas, etc. are being put into practical use as fuel for automobiles due to the depletion of oil and pollution. These gases are stored in the gas supply tank, pressurized to high pressure by the compressor of the gas filling device, and supplied to the fuel tank of the vehicle. Since the gas filling device handles highly flammable gases, equipment such as compressors is expensive, installation cost is high, and the number of gas-fueled cars is small at this stage. Therefore, it is difficult to cope with a difference in which the number of stands provided with the gas filling device is small and gas replenishment is required. Therefore, the present applicant proposes a mobile gas filling apparatus equipped with a bomber that accumulates gas and a charger mechanism for filling a vehicle with gas in a cylinder in a truck in Japanese Patent Application No. 2003-29784 (unpublished).

Although this proposal is valid, the gas in the cylinder is only filled in the vehicle through the charger, so when the pressure in the cylinder is lowered by the charging, the flow rate is accumulated, which causes the inconvenience of taking a long time. In addition, when the pressure in the cylinder becomes the same as in the fuel tank of the vehicle, the charging is not performed, so there is also a inconvenience in that the efficiency of the gas is large because there is a large amount of gas in the cylinder. [Patent Document 1] Japanese Patent Application No. 2003-29784

SUMMARY OF THE INVENTION The present invention has been made in view of the above. As a gas filling apparatus for filling gas into a vehicle in which gas has fallen on the road, a mobile gas filling capable of filling gas in a cylinder in a fuel tank of a vehicle without leaving the gas in a short time as possible as possible. It is an object to provide a device.

The mobile gas filling device 1 of the present invention includes a primary cylinder 4 in which gas is accumulated, a boosting device 5 connected to the primary cylinder 4 by a pipe 8, and a boosting device 5. Connected to a secondary cylinder 6 connected by a pipe 9 provided with an opening / closing valve 10 interposed therebetween, and a pipe 12 provided with an opening / closing valve 13 interposed between the secondary cylinder 6. The charging device 7 and the charging nozzle 17 connected to the charging device 7 via the charging hose 16 are mounted on the truck 2, and the control unit 19 of the charging device 7 is an open / close valve. (10) is opened to drive the booster (5) to pressurize the gas in the primary cylinder (4) to replenish and accumulate in the secondary cylinder (6), and to open and close the valve (13) to open the gas in the secondary cylinder (6). Is sent to the charging nozzle 17 through the charging device 7, the amount of charge to be charged from the charging nozzle 17 is calculated and displayed on the display 31.

In addition, the boosting device 5 and the charging device 7 are connected to a pipe 15 having an opening and closing valve 14 interposed therebetween, and the control unit 19 opens the opening and closing valve 14 to boost the boosting device 5. Drive the gas in the primary cylinder 4 to the filling nozzle 17 through the filling device 7 can be filled with gas in the primary cylinder when the gas in the secondary cylinder is finished.

In addition, since the pipes 8, 9, 12, and 15 are flexible pipes, the pipes are not loosened or damaged by vibrations during movement, so that there is little risk of gas leakage.

In addition, the secondary cylinder 6 is provided with a pressure sensor 18, the controller 19 controls the driving of the boosting device 5 on the basis of the pressure signal of the pressure sensor 18 to accumulate excessively This prevents the risk of overpressure on the secondary bomb.

In addition, since the charging device 7 is provided with a ten key 23 and a money inlet 29 for preset charging amount, charging operation and settlement are easy.

Hereinafter, an embodiment of a mobile gas filling apparatus of the present invention will be described as an example of filling hydrogen gas with reference to the drawings.

1 is a side view of a mobile gas filling device, FIG. 2 is a block diagram thereof, and FIG. 3 is a front view of the filling device.

As shown in FIG. 1, in the loading box 3 of the truck 2 of the mobile gas filling device 1, a plurality of primary cylinders 4a, 4b ……… (hereinafter, represented by reference numeral 4 in the case of accumulating hydrogen gas) ) And the booster device 5 for pressurizing the hydrogen gas in the primary cylinder 4, and the plurality of secondary cylinders 6a, 6b for accumulating the hydrogen gas pressurized by the booster device 5. (Hereinafter, denoted by reference numeral 6)) and a charging device 7 for charging hydrogen gas into the automobile M is mounted.

The primary cylinder 4 and the booster 5 are connected by a pipe 8, and the booster 5 and the secondary cylinders 6a, 6b are pipes 9a, 9b (hereinafter, represented by reference numeral 9). ), And the pipes 9a and 9b are provided with on / off valves 10a and 10b, which are referred to by reference numeral 10), and secondary cylinders 6a and 6b. And the measuring section 11 of the filling device 7 are connected by pipes 12a and 12b (hereinafter, denoted by reference numeral 12), and the openings and closing valves 13a and 13b (hereinafter represented by pipes 12a and 12b). Is described by reference numeral 13). In addition, the booster 5 and the measurement unit 11 are connected to each other by a pipe 15 provided with an opening / closing valve 14 interposed therebetween, and gas is supplied to the front end of the filling hose 16 connected to the measurement unit 11. ), A charging nozzle 17 is provided.

Flexible pipes are used for the pipes 8, 9, 12, and 15 so that the connection parts may be loosened or damaged by vibration during movement so that no gas leakage occurs.

The primary cylinder 4 is a relatively low pressure hydrogen gas accumulating about 20 Mp (megapascal), and is a hydrogen gas cylinder free to exchange. And the primary cylinder 4 which became empty by filling is peeled off from the pipe 8, and is exchanged with the cylinder filled with hydrogen gas. In addition, the primary cylinder 4 and the pipe 8 can be easily attached and detached by a quick coupling or the like.

The boosting device 5 increases the hydrogen gas of low pressure (20Mp) in the primary cylinder 4 to a high pressure of about 40Mp. The hydrogen gas pressurized by the boosting device 5 is sent to the secondary cylinder 6 through the pipe 9 or to the measurement unit 11 through the pipe 15.

The secondary cylinder 6 accumulates the hydrogen gas pressurized by the high pressure (40 Mp) in the boosting device (5). The secondary cylinders 6a and 6b are provided with pressure sensors 18a and 18b (hereinafter, denoted by reference numeral 18), and the pressure signal of the pressure sensor 18 is controlled by the controller 19 of the charging device 7. To be sent).

In addition, a safety valve 20 is provided in the secondary cylinder 6 to prevent the high pressure breakage of the secondary cylinder 6 by opening the safety valve 20 at the time of abnormal high pressure.

The measuring unit 11 of the filling device 7 measures the amount of hydrogen gas charged from the filling nozzle 17. And the measuring part 11 is provided with the pressure sensor 21 which detects the pressure of a charging side, and the pressure signal of this pressure sensor 21 is sent to the control part 19. As shown in FIG.

As shown in FIG. 3, the operation panel 22 of the charging device 7 includes a ten key 23, an operation indicator 24, a start switch 25, a stop switch 26, an emergency stop switch 27, and a notifier. (28), a currency inlet 29, a currency outlet 29a, a printer 30, an indicator 31, and the like are provided.

Each device mentioned above is provided in the case 32 provided in the loading box 3 of the truck 2, and the gas sensor 33 and the vent pipe 34 are provided in the upper end of the case 32. As shown in FIG. When the hydrogen gas leaks from each device, the gas detection signal of the gas sensor 33 is transmitted to the control unit 19 so that the notifier 28 operates and discharges hydrogen gas from the vent pipe 34 into the atmosphere. The safety of the gas filling device 1 is ensured.

As shown in Fig. 4, the above-described devices and the control unit 19 are connected by signal lines to receive control signals. In addition, the locking signal of the side brake 35 of the truck 2 and the off signal of the ignition key 36 are also input to the control unit 19 so as to be charged when the engine is stopped by applying the side brake. To ensure safety.

Next, the charging operation of the mobile gas filling device 1 will be described with a flowchart showing the charging operation of FIG. 5.

The truck 2 is stopped close to the vehicle M filling hydrogen gas, and the filling nozzle 17 of the filling device 7 is connected to the filling opening of the fuel cylinder of the automobile M. Then, if necessary, the preset amount is inputted from the ten key 23 of the operation panel 22, or a desired amount of money is input into the currency input port 29 and the start switch 25 is pressed (ST1). It inputs to the control part 19, and opens and closes the valve 13a (ST2).

As the open / close valve 13a is opened, the hydrogen gas in the secondary cylinder 6a is charged from the charging nozzle 17 to the vehicle M through the pipe 12a, the measuring unit 11 and the filling hose 16. And the charge amount measured by the measuring part 11 is calculated by the control part 19, and is displayed on the display 31. As shown in FIG.

The pressure signal of the pressure sensor 21 of the measuring part 11 and the pressure sensor 18a of the secondary cylinder 6a are compared by the control part 19, and when both pressure signals are balanced (ST3), it is impossible to charge Judging by it, the opening-closing valve 13a is closed, the opening-closing valve 13b is opened (ST4), and it transfers to charging from the secondary cylinder 6b.

The hydrogen gas in the secondary cylinder 6b has the same shape as that of the secondary cylinder 6a described above, and the hydrogen gas is discharged from the charging nozzle 17 through the pipe 12b, the measuring unit 11, and the charging hose 16. M) is charged. When the pressure signals of the pressure sensor 21 and the pressure sensor 18b are balanced by charging (ST5), the opening / closing valve 13b is closed and the opening / closing valve 14 is opened to drive the booster 5. (ST6), the process proceeds to charging from the first bomb.

Then, if it is charged up to the preset amount (ST7), the pressure signal of the pressure sensor 21 is the maximum pressure, that is, when the fuel cylinder of the vehicle (M) as a tank (ST8), the closing valve 14 closes the booster ( 5) is stopped (ST9), and the end of charging is notified from the notifier 28 (ST10).

When the worker who notices the end of the charging by the notifier 28 removes the charging nozzle 17, the worker presses the charging device 7, presses the stop switch 26 of the operation panel 22 (ST11), and charges from the printer 30. The document is issued (ST13).

The charging operation is terminated by calculating the charging fee based on the slip.

In step ST3, when the pressure signal of the pressure sensor 21 and the pressure sensor 18a reaches the preset amount before balancing, or the pressure signal of the pressure sensor 21 before reaching the preset amount, Is at the maximum pressure (ST14), the opening / closing valve 13a is closed (ST15), the flow proceeds to step ST10, and the end of charging is notified from the notifier 28. FIG.

Similarly, in step ST5, when the pressure signal of the pressure sensor 21 and the pressure sensor 18b reaches the preset amount before balancing (ST16), or before reaching the preset amount, the pressure sensor 21 When the pressure signal from the pressure reaches the maximum pressure (ST17), the opening / closing valve 13b is closed (ST18), the process proceeds to step ST10, and the notifier 28 operates.

As described above, a plurality of secondary cylinders 6 are provided, in this embodiment, two are provided, initially charged from the secondary cylinders 6a, and only when the gas in the secondary cylinders 6a is not finished. Then, charging is performed from the secondary cylinder 6b.

In addition, when the filling is not finished even with the gas in the secondary cylinder 6b, the primary cylinder 4 is to be charged. As such, the gas in the secondary cylinder, which has been accumulated at high pressure, can be charged in a short time if possible. In addition, since the gas in the primary cylinder 4 is pressurized by the booster device 5 and accumulated in the secondary cylinder 6, the gas remaining in the primary cylinder 4 can be reduced as much as possible.

FIG. 6 shows the flow of supplemental and accumulating hydrogen gas to the secondary cylinder 6, in which the pressure signal of the pressure sensor 18 is below a certain level (ST21), and the opening / closing valve 13 is closed (ST22). In other words, when there is less hydrogen gas in the secondary cylinder 6 and the filling operation is not performed, the opening and closing valve 10 is opened to drive the boosting device 5 (ST23), so that the hydrogen in the primary cylinder 4 is reduced. The gas is pressurized and accumulated in the secondary cylinder 6. When the pressure signal of the pressure sensor 18 reaches a predetermined pressure (ST24), the booster device 5 is stopped by closing the opening / closing valve 10 (ST25), and the supplementary pressure accumulation of hydrogen gas to the secondary cylinder 6 To exit.

In this way, a plurality of secondary cylinders 6 are also provided, and when accumulating at the time of non-charging, there is no inconvenience even when it takes time to accumulate, and the pressure booster 5 having a small capacity is also good and the cost can be lowered.

The effects of the mobile gas filling apparatus of the present invention are listed below.

(1) The gas in the secondary cylinder pressurized by the booster can be filled in as short a time as possible.

(2) Since the gas in the primary cylinder is pressurized by the booster to accumulate in the secondary cylinder, the residual gas in the primary cylinder can be reduced as much as possible.

(3) Since the gas in the primary cylinder can be pressurized by the booster and directly charged from the filling device, the residual gas in the primary cylinder can be reduced as much as possible, resulting in good efficiency.

(4) Since two secondary cylinders are provided to alternately charge and accumulate pressure, it is possible to accumulate during non-charging time, and the charging device can be configured with a small booster to reduce the cost. have.

(5) Since flexible pipes are used, the pipes are not spooled or damaged by vibrations, which reduces the risk of gas leakage.

(6) Since the booster is controlled based on the pressure signal of the pressure sensor provided in the secondary cylinder, the overpressure is eliminated and the risk of overpressure of the secondary cylinder can be prevented.

Claims (4)

The primary cylinder 4 which accumulates gas, the booster device 5 connected to the primary cylinder 4 by the pipe 8, and the opening / closing valve 10 were installed between the booster device 5 in between. The secondary cylinder 6 connected by the pipe 9, the charging device 7 connected by the pipe 12 which provided the opening / closing valve 13 to the secondary cylinder 6, and the charging device 7 The charging nozzle 17 connected to the charging hose 16 and the control unit 19 of the charging device 7 opens the on / off valve 10 to drive the boosting device 5 to operate the primary cylinder 4. The gas in the secondary cylinder 6 is supplemented and compressed by pressurizing the gas in the secondary cylinder 6, and the opening / closing valve 13 is opened to send the gas in the secondary cylinder 6 to the filling nozzle 17 through the filling device 7 to supply fuel to the vehicle. In the gas filling apparatus that charges the gas into the cylinder, calculates the amount of charge to be charged from the filling nozzle 17 and displays it on the display 31, The above devices are mounted on the truck 2, the boosting device 5 and the filling device 7 are connected by a pipe 15 having an opening / closing valve 14 interposed therebetween, and the control unit 19 is Pressure booster by opening and closing the valve 14 when the gas charging operation through the secondary cylinder 6 is stopped by balancing the pressure with the fuel cylinder of the vehicle M during the gas filling operation through the car bomb 6. (5) by driving the gas in the primary cylinder 4 directly to the charging nozzle (17) through the charging device (7) to control the filling by the lack of gas remaining in the secondary cylinder while gas fuel to the vehicle When the filling operation is interrupted in the middle of the mobile gas filling apparatus characterized in that the pressure in the primary cylinder to pressurize the gas directly supplied to the fuel cylinder of the vehicle to complete the filling. delete The method of claim 1, Mobile gas filling device, characterized in that the pipe (8, 9, 12, 15) is a flexible pipe. The method according to claim 1 or 3, The secondary cylinder is provided with a pressure sensor, the control unit 19 controls the driving of the on-off valves (10, 13, 14) and the boosting device (5) based on the pressure signal of the pressure sensor (18). Mobile gas filling device characterized in that.

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