JPH0953797A - Gas feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fill with gas while a gas temperature is kept low without having influence of circumferential temperature upon a gas feeding pipeline in a gas feeder by which gas is fed to a tank to be filled through the gas feeding pipeline in which a control valve for controlling a gas flow quantity is arranged, by covering the outer circumference of the gas feeding pipeline with a thermal insulator. SOLUTION: A gas feeder 1 which is arranged at a gas feeding station and so on at which compressed natural gas is fed to the fuel tank 3 (tank to be filled) of an automobile 2, is composed of a pressure generating unit 4 and a dispenser unit 5 by which compressed gas is fed to the fuel tank 3, and both units 4, 5 are connected to each other through a gas feeding pipeline 28. In this case, in the basket of the dispenser unit 5, the circumference of a gas feeding pipeline 28a extended downstream from a control valve 32 is covered with a thermal insulator 51 by which circumferential temperature is shut off. Hereby, temperature rise of gas fed to the tank 3 by being passed through the gas feeding pipeline 28a is suppressed, and a gas filling quantity in the tank 3 is prevented from being decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas supply device, and more particularly to a gas supply device configured to fill a filled tank with a compressed gas.

[0002]

2. Description of the Related Art For example, in a gas supply device for supplying compressed natural gas (CNG) obtained by compressing natural gas to a tank,
It is configured to have a pressure generation unit that compresses the supplied gas by a compressor, and a dispenser unit that fills the gas compressed by the gas compression unit into a filling tank. In a gas supply system using such a gas supply device, the target filling pressure when filling the filled tank is 200 kgf / cm ² , and the compression pressure before filling in the pressure generating unit is as high as 250 kgf / cm ^2. It is set. Therefore, when the gas compressed to 250 kgf / cm ² by the pressure generating unit is supplied to the filling tank, the temperature of the filling tank rises due to the heat of the compressed gas.

In the dispenser unit, gas filling control is performed so that the pressure of the tank to be filled reaches the target filling pressure in a shorter time. For example, a constant pressure increase control system in which the gas is filled at a constant pressure increase. Alternatively, the valve opening degree of the control valve disposed in the gas supply pipeline is controlled by a constant flow rate control method in which the gas is filled at a constant flow rate.

[0004]

When the gas compressed as described above is supplied to the tank to be filled, the temperature of the tank to be filled rises due to the heat of the compressed gas, so that the pressure in the tank to be filled also increases. As a result, the gas filling amount decreases and the gas filling amount decreases accordingly. Moreover, since it takes a considerable time for the temperature of the filled tank to drop, it is not possible to wait for the temperature of the filled tank to drop before refilling.

Further, since the above-mentioned dispenser unit is installed on the ground, the gas supply pipe line arranged in the dispenser unit is heated to a considerable temperature by solar heat in the summer when the sun is strong. Therefore, the gas supplied from the pressure generating unit is heated in the process of passing through the gas supply pipeline of the dispenser unit,
The tank to be filled is filled in the expanded state due to the temperature rise.

As a result, even when the pressure of the tank to be filled reaches the target filling pressure at the time of gas filling, the filled gas is expanding, so that only the apparent target filling pressure is reached and the gas filling is completed. As time elapses after the completion, the temperature of the filled tank decreases and the pressure of the filled tank also decreases.

Therefore, although the valve opening of the control valve is conventionally controlled by the constant pressure increase control system or the constant flow rate control system as described above, the amount of gas generated due to the temperature rise in the gas supply line is increased. The expansion causes a substantial decrease in the flow rate to be filled in the tank to be filled, and there is a problem that the pressure in the tank to be filled sharply decreases as the temperature of the tank to be filled decreases with time.

Therefore, an object of the present invention is to provide a gas supply device which solves the above problems.

[0009]

In order to solve the above problems, the present invention has the following features. According to the invention of claim 1, the end portion of the gas supply line in which the control valve for controlling the flow rate of the gas is arranged is connected to the tank to be filled,
In the gas supply device for supplying gas to the tank to be filled, the gas supply pipeline is covered with a heat insulating material.

Therefore, according to the first aspect of the invention, since the outer periphery of the gas supply pipeline is covered with the heat insulating material, the gas supply pipeline is less susceptible to the ambient temperature and the gas temperature is as low as possible. Filling can be performed while maintaining the temperature, and it is possible to suppress the temperature rise of the filled tank,
It is possible to prevent a decrease in the gas filling amount due to a temperature rise during gas filling.

The invention according to claim 2 is characterized in that the heat insulating material is housed inside a cover that can be opened and closed. Therefore, according to the invention of claim 2, since the heat insulating material is housed in the cover that can be opened and closed, it is possible to reliably prevent the ambient temperature from affecting the gas supply pipeline, and
When inspecting the gas supply line, the cover can be opened to facilitate the inspection work.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the gas supply device according to the present invention. The gas supply device 1 is installed, for example, at a gas supply station that supplies compressed natural gas (CNG) obtained by compressing city gas to a predetermined pressure to a fuel tank (filled tank) 3 of an automobile 2.

The gas supply device 1 generally supplies a pressure generating unit 4 for compressing city gas to a predetermined pressure to generate a pressurized gas, and a gas compressed by the pressure generating unit 4 to the fuel tank 3. Of the dispenser unit 5. The pressure generation unit 4 has a configuration in which a compressor 12 is arranged in a branch pipe line 11 that is branched from an intermediate pressure pipe line before city gas or the like is branched to a home. The compressor 12 is, for example, a multi-stage type in which a plurality of cylinders for compressing gas (three or four) are provided, and the gas compressed in the cylinder in the previous stage is further increased in pressure in the cylinder in the next stage. The gas pressurized and supplied from the medium-pressure line 10 is compressed stepwise.

Further, a check valve 14 for preventing the reverse flow of the gas generated by the compressor 12 is provided in the high pressure pipe 13 drawn out from the compressor 12.
A first high-pressure gas pressure accumulator 17 and a second high-pressure gas pressure accumulator 18 are connected to the ends of the branch lines 15 and 16 branched from the high-pressure line 13, respectively. The high pressure gas accumulators 17 and 18 are also generally referred to as "gas accumulators" in the literature and the like.

The high pressure gas accumulators 17 and 18 store the high pressure gas compressed by the compressor 12, that is, the gas compressed to 250 kgf / cm ² in this embodiment. Further, the branch pipes 15 and 16 are provided with first and second solenoid valves.
Second on-off valves 19 and 20, pressure transmitters 21 and 22,
Manual on-off valves 23 and 24 are provided.

The pressure transmitters 21 and 22 are internally provided with pressure sensors for detecting the pressure of the gas flowing through the branch pipes 15 and 16, and output a detection signal corresponding to the pressure of the gas. Further, a third opening / closing valve 26, which is an electromagnetic valve, is provided upstream of the gas supply conduit 28 communicating with the branch conduits 15 and 16.
Are arranged. The third on-off valve 26 is configured so that the gas compressed by the compressor 12 is a high pressure gas accumulator 17,
The gas is prevented from flowing out to the dispenser unit 5 by closing the valve when it is supplied to the high pressure gas accumulator 1
When the fuel tank 3 is filled with the gas inside 7, 18, the valve is opened.

The manual open / close valves 23 and 24 are normally in the open state, and for example, when the open / close valves 19 and 20 fail, or when the open / close valves 19 and 20 are inspected, a valve closing operation is performed. To be done. Therefore, in the process in which the gas compressed by the compressor 12 is supplied to the high-pressure gas accumulators 17 and 18, the first and second opening / closing valves 19 and 20 are opened and the third opening / closing valve 26 is closed. To be done. When the pressure in the high pressure gas accumulators 17 and 18 reaches a predetermined pressure,
The first and second opening / closing valves 19 and 20 are closed, and the pressure generating unit 4 is in a standby state ready for a filling operation.

The amount of gas filled from the high pressure gas pressure accumulators 17 and 18 into the fuel tank 3 varies depending on the remaining amount of the fuel tank 3 as will be described later. There is a case where the fuel tank 3 is filled up by the gas supply of 1), and a case where the fuel tank 3 is filled up by the gas supply from both the high pressure gas accumulators 17 and 18.

The pressure generating unit 4 and the dispenser unit 5 are connected to each other via a gas supply line 28. Then, in the gas supply pipeline 28 extending into the dispenser unit 5, an on-off valve 29 made of an electromagnetic valve for opening and closing the gas supply pipeline 28 and a pressure of the gas supplied from the pressure generating unit 4 are detected 1 Next pressure transmitter 30
A flow meter 31 for measuring the flow rate of the gas flowing through the gas supply pipeline 28, a control valve 32 for controlling the pressure or flow rate to be fed downstream to a predetermined value, and a control valve 32 provided downstream of the control valve 32. A secondary pressure transmitter 33 for detecting the secondary pressure to be generated,
An emergency disconnect coupler 34 is provided which separates when pulled by a force greater than a predetermined value.

In the housing of the dispenser unit 5, a gas supply line 28a extending downstream from the control valve 32.
The outer periphery of is covered with a heat insulating member 51 that blocks the ambient temperature, as described later. The heat insulating member 51 is formed so as to cover the outer circumference without any gap over the entire length of the gas supply pipeline 28a extending into the housing of the dispenser unit 5, and the temperature inside the dispenser unit 5 rises due to the irradiation of sunlight. Even so, the temperature of the gas supply pipeline 28a can be kept low.

Therefore, the temperature rise of the gas supplied to the fuel tank 3 through the gas supply line 28a is suppressed,
It is possible to prevent a substantial decrease in the gas filling amount in the fuel tank 3 due to a decrease in temperature after the gas volume apparently increases due to temperature expansion and the fuel tank 3 is filled with the gas.
The heat insulating member 51 also has a role of protecting the gas supply pipeline 28a.

The on-off valve 29 functions as a main valve of the pressure generating unit 4 and opens or closes in response to a command from the control circuit 35. The primary pressure transmitter 30 and the secondary pressure transmitter 33 transmit a detection signal corresponding to the pressure detected at each mounting position to the control circuit 35.

Further, the flow meter 31 employs a Coriolis mass flow meter capable of accurately measuring the flow rate of the high pressure gas, and sends the flow rate measurement signal to the control circuit 35. Therefore, the control circuit 35 integrates the flow rate measured by the flow meter 31, and also controls the open / close valve 29 and the control valve 3.
The control of 2 is executed.

The control valve 32 is a constant pressure increase control for filling the gas with a constant pressure increase by the control circuit 35,
Alternatively, the valve opening is controlled by constant flow rate control in which gas is filled at a constant flow rate. Reference numeral 36 denotes a display, which displays the filling amount and filling pressure (secondary pressure) of the gas filled in the fuel tank 3.

The emergency disconnecting coupler 34 is connected to one end of a high pressure gas supply tube 37 capable of withstanding high pressure gas, and the other end of the high pressure gas supply tube 37 is connected to an inflow port a of a three-way valve 38. Further, a flexible supply hose 39 is connected to the filling port b of the three-way valve 38. A detachable coupler 40 is provided at the end of the supply hose 39.

The exhaust port c of the three-way valve 38 is connected to a low pressure pipe 41 for releasing the residual gas in the detachable coupler 40 to the outside so that the detachable coupler 40 can be detached after the gas supply is completed. There is. The low-pressure pipe line 41 is connected to a gas recovery path that opens the atmosphere or recovers the residual gas in the detachable coupler 40.

The three-way valve 38 is constructed so that it can be switched by manual operation. Before and after gas filling, the filling port b and the exhaust port c are in communication with each other and the inflow port a is blocked. Further, at the time of gas filling, switching operation is performed so that the inflow port a and the filling port b communicate with each other and the exhaust port c is shut off.

The emergency disconnection coupler 34 is provided inside the emergency disconnection coupler 34 in addition to disconnecting the emergency disconnection coupler 40 when the vehicle 2 starts with the disconnection coupler 40 still connected to the removal coupler 42 on the fuel tank 3 side. A check valve (not shown) provided closes to prevent gas leakage.

Further, in the automobile 2 filled with high-pressure gas, a detachable coupler 42 to which the detachable coupler 40 is coupled from the upstream side to a pipeline 44 connected to the fuel tank 3,
A manual opening / closing valve 45 that is opened by a manual operation when filling the gas and a check valve 46 that prevents the gas filled in the fuel tank 3 from flowing backward are provided.

FIG. 2 is a longitudinal sectional view showing the mounted state of the heat insulating member 51, FIG. 3 is a perspective view showing the mounted state of the heat insulating member 51, and FIG. 4 is a perspective view showing the back side of the heat insulating member 51. The heat insulating member 51 is a heat insulating material 52 that covers the outer periphery of the gas supply pipeline 28a.
And a cylindrical cover 53 that covers the outer periphery of the heat insulating material 52. The heat insulating material 52 and the cover 53 are configured so that two members having a semicircular cross section can be opened and closed.

The heat insulating material 52 is made of a material having a high heat insulating property. In this embodiment, as the material of the heat insulating material 52, for example, urethane foam having many fine bubbles inside is used. Further, the heat insulating material 52 may be made of a material containing activated carbon having the above-described heat insulating properties and a deodorizing effect. In this case, it is possible to prevent the heat insulating material 52 itself from adsorbing the gas when the gas leaks and leaking the gas to the outside.

Further, by incorporating a force sensor in the heat insulating material 52, when a gas leak occurs while the heat insulating member 51 is attached to the gas supply conduit 28a, the force sensor changes the pressure acting on the heat insulating material 52. Since it is detected, it is possible to reliably detect the gas leakage from the gas supply line 28a.

The heat insulating member 51 has a structure in which the heat insulating material 52 and the cover 53 can be divided into two along the longitudinal direction.
Fan-shaped heat insulating material halves 52a and 52b are fixed inside the arc-shaped cover halves 53a and 53b. Cover half 5
3a and 53b have one ends of arcuate portions rotatably connected to each other by a hinge 55. In addition, the cover half 53
At the other end of the arcuate portion of a and 53b, a stopper 56 formed in a rectangular frame shape and a protrusion 57 for locking the stopper 56 are formed.
Are provided.

Therefore, the heat insulating member 51 is connected to the gas supply line 28.
When it is mounted on the outer periphery of a, the stopper 56 provided on the cover half body 53a is locked to the protrusion 57 provided on the cover half body 53b, and the cover half bodies 53a and 53b are joined in a closed state. . Then, arcuate grooves 58a and 58b are formed so as to extend in the longitudinal direction of the abutting surfaces of the heat insulating material halves 52a and 52b.

The grooves 58a and 58b are formed in the cover half body 53.
The circular hollow portion 59 through which the gas supply pipeline 28a is inserted is formed by connecting the a and 53b in the closed state. Therefore, the heat insulating material halves 52a and 52b can be fitted to the outer periphery of the gas supply pipeline 28a without a gap by the pair of grooves 58a and the groove 58b facing each other, and can cover the outer periphery of the gas supply pipeline 28a. .

The stoppers 56 provided on the cover half body 53a are engaged with the protrusions 57 provided on the cover half body 53b so that the heat insulating material halves 52a and 52b are compressed inward. Pressurized. Therefore, the heat insulation half bodies 52a and 52b are pressed toward the center by the cover half bodies 53a and 53b, and the pair of grooves provided on the inner circumference side of the heat insulation half bodies 52a and 52b. 58
The groove a and the groove 58b are crimped to the outer circumference of the gas supply line 28a.

As a result, the heat insulating material halves 52a and 52b are formed.
Is compressed by the pressing of the cover halves 53a and 53b, and is therefore kept airtight. Therefore, the gas supply line 28a is reliably cut off from the ambient temperature. as a result,
Since an increase in the temperature of the gas flowing through the gas supply pipeline 28a can be suppressed, the expansion of the gas can be prevented by the increase in the temperature, and the amount of gas filled in the fuel tank 3 can be secured.

FIG. 5 is a vertical cross-sectional view showing a state where the heat insulating member 25 is opened, and FIG. 6 is a perspective view showing a state where the heat insulating member 25 is opened. In this way, by removing the stopper 56 from the projection 57 and rotating the cover halves 53a and 53b by rotating them around the hinge 55, the heat insulating material halves 52a and 52b are rotated by 180 degrees.
° It will be open. With this, the heat insulating member 51 is separated from the gas supply pipeline 28a, so that the gas supply pipeline 28a can be inspected for scratches or cracks. Then, after the inspection is completed, the heat insulating member 51 is mounted again on the outer periphery of the gas supply conduit 28a.

Here, a gas filling operation in the gas supply device 1 having the above-mentioned structure will be described. When filling the fuel tank 3 of the automobile 2 with gas, an operator first connects the detachable coupler 40 of the dispenser unit 5 to the detachable coupler 42 of the automobile 2. Then, the manual on-off valve 45 of the automobile 2 is opened, and the three-way valve 38 is switched so that the inflow port a and the filling port b are communicated with each other.

Next, when a filling start button (not shown) is turned on, the control circuit 35 causes the first and third opening / closing valves 19 and 2 to operate.
6 is opened and the on-off valve 29 is opened. As a result, the high-pressure gas accumulated in the first high-pressure gas accumulator 17 is filled in the fuel tank 3 through the gas supply pipelines 28 and 28a, the high-pressure gas supply hose 37, the detachable couplers 40 and 42, and the pipeline 44. To be done.

Immediately after the start of filling, the valve opening of the control valve 32 arranged in the gas supply line 28 is slightly narrowed, and the pressure of each device due to the gas from the first high pressure gas accumulator 17 is reduced. The pressure is reduced to protect each device from high pressure gas. Then, after a lapse of a predetermined time (for example, about 5 seconds), the valve opening degree of the control valve 32 is gradually opened to increase the gas filling flow rate.

In this embodiment, the fuel tank 3 is filled.
The filling pressure when the tank is full is 200 kgf / cm ²Becomes For example, burn
If the gas in the fuel tank 3 remains, the first high pressure gas
Filled with gas from the pressure accumulator 17 only (fuel tank is full)
Pressure in chamber 3 is 200 kgf / cm ²It will be in a state of boosting to
However, the amount of gas remaining in the fuel tank 3 is small and the gas is almost empty.
When the filling work is started, the first high pressure gas pressure accumulation
Filling the gas from the vessel 17 alone does not fill the tank.

In this case, the control circuit 35 uses the first opening / closing valve 1
9 is closed, and the second and third on-off valves 20, 2
6 is opened. Thereby, the second high pressure gas accumulator 1
8 is filled in the fuel tank 3. Then, when the fuel tank 3 reaches a full state, the control circuit 35 closes the second and third opening / closing valves 20 and 26, and
The on-off valve 29 is closed.

When the fuel tank 3 is completely filled with gas,
The operator connects the filling port b and the exhaust port c of the three-way valve 38 and shuts off the inflow port a. The exhaust port c exhausts the gas remaining in the detachable coupler 40 and the supply hose 39 via the low pressure pipe 41. Since the pressure inside the detachable coupler 40 is released in this manner, the detaching operation of the detachable coupler 40 can be performed.

The operator closes the manual on-off valve 45 on the side of the automobile 2 and then the detachable coupler 4 of the dispenser unit 5.
0 is separated from the detachable coupler 42 of the automobile 2. This completes a series of gas filling operations. Thus, when the fuel tank 3 is filled with gas via the dispenser unit 5, the filling pressure rises and the temperature of the fuel tank 3 rises. Further, when the gas volume is the same and the filling amount is the same, the absolute temperature and the pressure are in a proportional relationship, and the pressure rises as the temperature rises and the pressure falls as the temperature falls.

The control valve 3 whose valve opening is controlled as described above
The gas temperature after being throttled by 2 is low due to the adiabatic expansion action, but the gas line (gas supply line 28a and high-pressure gas supply tube 3) until the fuel tank 3 is filled up
7. The temperature rises in the pipe line 44). Therefore, when the maximum working pressure is determined like the fuel tank 3, the temperature of the fuel tank 3 will decrease after the gas filling is completed unless the fuel tank 3 is filled with the gas while preventing the temperature from rising. As a result, the pressure also decreases, and despite the fact that the fuel tank 3 was filled with the target pressure (200 kgf / cm ² ), the pressure in the fuel tank 3 decreased with the passage of time and a sufficient filling amount was obtained. Will not be secured.

However, in this embodiment, the control valve 32
Since the outer circumference of the gas supply pipeline 28a extending further downstream is covered with the heat insulating member 51 having high heat insulation, the temperature rise of the gas supply pipeline 28a is suppressed, and the fuel tank remains in the low temperature state. 3 will be filled.

For example, if the gas temperature when passing through the flow meter 31 is 40 ° C., the gas temperature after the flow rate is controlled by the control valve 32 becomes 0 ° C. or less. After that, in the high pressure gas supply tube 37 and the pipeline 44, the gas temperature rises to 20 ° C. or higher by being warmed by the outside temperature.

However, by covering the outer periphery of the gas supply pipe 28a arranged in the dispenser unit 5 with the heat insulating member 51 as in the present embodiment, the gas temperature in the high pressure gas supply tube 37 is 10 ° C. or less. Can be suppressed to. For example, 2 large fuel tanks (500 liters)
When filling to a pressure of 00 kgf / cm ² , the gas supply line 28
If the heat insulating member 51 is provided on the outer periphery of a, the filling amount is 5
It can be increased by about 8 kgf.

In the above embodiment, the case where compressed natural gas (CNG) obtained by compressing city gas is supplied is given as an example, but the present invention is not limited to this, and gas such as butane and propane may be supplied. Of course, it can be applied. Also,
By making the material of the heat insulating material 52 highly airtight, the heat insulating effect on the gas supply pipeline can be further enhanced, and the amount of gas filled in the tank to be filled can be secured.

In the above embodiment, the heat insulating member 51 covers the outer circumference of the gas supply conduit 28a arranged in the dispenser unit 5 located downstream of the control valve 32, but the invention is not limited to this. Of course, the outer periphery of the other gas supply conduit 28 may be covered with the heat insulating member 51.

The third on-off valve 26 of the above embodiment may be eliminated. In that case, the compressor 12
A part of the gas compressed by is also supplied to the gas supply pipeline 28 side, but the open / close valve 29 of the dispenser unit 5 arranged on the downstream side of the gas supply pipeline 28 is closed. Can be supplied to the high pressure gas accumulators 17, 18.

In the above embodiment, the case where the fuel tank 3 of the automobile 2 is filled with the compressed gas has been described as an example, but the present invention is not limited to this, and a device for supplying the compressed gas to another container or the like. Needless to say, the present invention can also be applied to a device configured to be installed in the middle of a pipeline for simply feeding compressed gas to another place.

In the above embodiment, the city gas is compressed from the medium pressure pipeline 10 before the city gas is branched to the home. However, the invention is not limited to this. The gas may be taken out from the household pipeline.

[0055]

As described above, according to the first aspect of the present invention, since the outer circumference of the gas supply line is covered with the heat insulating material,
The gas supply pipeline is less affected by the ambient temperature, the gas can be filled while keeping the gas temperature as low as possible, and the temperature rise of the tank to be filled can be suppressed and the gas due to the temperature rise can be suppressed. It is possible to prevent the filling amount from decreasing. Therefore, the temperature decrease of the filled tank is reduced after the completion of the gas filling of the filled tank, and the decrease of the filling amount due to the temperature decrease can be prevented.

Further, according to the invention of claim 2, since the heat insulating material is housed in the cover which can be opened and closed, it is possible to surely prevent the ambient temperature from affecting the gas supply pipe line, and at the same time, the gas supply pipe can be surely prevented. You can open the cover to inspect the road easily.

[Brief description of drawings]

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

FIG. 2 is a vertical cross-sectional view showing a mounted state of a heat insulating member.

FIG. 3 is a perspective view showing a mounted state of a heat insulating member.

FIG. 4 is a perspective view showing the back side of the heat insulating member.

FIG. 5 is a vertical cross-sectional view showing a state in which a heat insulating member is opened.

FIG. 6 is a perspective view showing a state in which a heat insulating member is opened.

[Explanation of symbols]

 1 Gas Supply Device 3 Fuel Tank 4 Pressure Generation Unit 5 Dispenser Unit 12 Compressor 17 First High Pressure Gas Accumulator 18 Second High Pressure Gas Accumulator 21,22 Pressure Transmitter 29 Opening Valve 28, 28a Gas Supply Pipeline 30 1 Secondary pressure transmitter 31 Flow meter 32 Control valve 33 Secondary pressure transmitter 34 Emergency release coupler 38 Three-way valve 35 Control circuit 40, 42 Detachable coupler 51 Insulation member 52 Insulation material 52a, 52b Insulation material half 53 Cover 53a, 53b Cover Half body

Claims (2)

[Claims] 1. A gas supply device for supplying gas to a tank to be filled via a gas supply line in which a control valve for controlling the flow rate of gas is arranged, wherein the outer periphery of the gas supply line is covered with a heat insulating material. A gas supply device characterized in that 2. The gas supply device according to claim 1, wherein the heat insulating material is housed in an openable / closable cover.