JP2968766B2 - Liquefied gas carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called bulk lorry or the like which is suitably used for transporting liquefied petroleum gas (hereinafter referred to as liquefied gas) such as propane gas or butane gas in a dedicated container. Liquefied gas carrier.

[0002]

2. Description of the Related Art In general, liquefied gas such as propane gas or butane gas is filled into a container such as a liquefied gas transport vehicle (bulk lorry) from a large base storage tank provided at a shipping base, and then the lorry is transported by the bulk lorry. It is transported to the destination.

[0003] A bulk supply system using a conventional bulk truck of this type will be described with reference to FIGS. 4 to 6.

In FIG. 1, reference numeral 1 denotes a bulk lorry as a liquefied gas carrier, and the bulk lorry 1 has a driver's cab 2 in the front.
A is provided with a vehicle main body 2 provided with A, a container 3 formed of a tank mounted on the vehicle main body 2 located on the rear side of the cab 2A, and the like. And, on the bottom side of the container 3, an emergency shutoff valve 4 serving as an outflow / inflow port of vapor described later;
An emergency shut-off valve 5 serving as an inlet of the liquefied gas F and a submerged pump 6 as a pump located between the emergency shut-off valves 4 and 5 are provided. An emergency shutoff valve 7 serving as an outflow port is provided.

A guide tube 8 is disposed in the container 3 so as to extend upward. The guide tube 8 has a lower end connected to the emergency shutoff valve 4 and an upper end connected to the liquefied gas accommodated in the container 3. It protrudes from the liquid level of F. Further, a liquid level gauge (not shown) is provided in the container 3 so that the liquid level of the liquefied gas F in the container 3 can be detected by the liquid level gauge.

On the other hand, on the side of the vehicle body 2, an operating mechanism 13 for the emergency shut-off valves 4, 5, 7 including a hydraulic hand pump 9, a hydraulic stop valve 10, a pilot line 11, an emergency hydraulic release valve 12, and the like. The operating mechanism 13 switches the emergency shutoff valves 4, 5, 7 from the open state to the closed state by changing the pressure in the pilot line 11 in an emergency, and receives the liquefied gas F into the container 3. , The payout is interrupted.

[0007] Reference numeral 14 denotes a liquefied gas F receiving pipe connected to the container 3 via the emergency shutoff valve 5, and the receiving pipe 14 has a base end connected to the emergency shutoff valve 5 as shown in FIGS. A first introduction pipe 14A having a distal end extending to the outside of the container 3 and a connection point 15 at the distal end of the introduction pipe 14A.
, And a third introduction line 14C connected to the distal end of the introduction line 14B via a liquid take-in / out valve 16.

Here, a coupling 17 serving as a receiving port for the liquefied gas F is provided at the distal end side of the introduction pipe 14C, and the coupling 17 is connected to a base storage tank 6 of a shipping base 61 described later.
2 and the like, the configuration allows the liquefied gas F in the base storage tank 62 to be guided toward the receiving pipe 14 in the direction of arrow A in FIG. In addition, the introduction line 14C
A bleeder valve 18 is connected to the distal end of the valve so as to branch off from the coupling 17 side. Furthermore, the introduction line 14
A general-purpose main valve 19 is provided in the middle of A. The main valve 19 is closed when the container 3 is inspected or the like, and is normally kept open.

Reference numeral 20 denotes a discharge pipe for the liquefied gas F connected to the container 3 via the submerged pump 6 and the emergency shutoff valve 7.
As shown in FIG. 4 and FIG. 5, the discharge pipe 20 has a first outlet pipe 20A whose base end is connected to the emergency shutoff valve 7 and whose distal end extends to the outside of the container 3, and a first outlet pipe 20A. Second lead-out conduit 2 connected to the distal end at the position of connection point 21
0B and a long outlet hose 20 connected to the distal end side of the outlet pipe 20B via a general-purpose swivel joint 22.
And C.

At this time, a safety coupling 23 serving as a discharge port of the liquefied gas F is provided at a distal end side of the outlet hose 20C via a safety stop valve 24.
3 is a bulk storage tank 71A- of general households 71-75 described later.
75A etc., the liquefied gas F in the container 3 is discharged through the discharge pipe 20 and the bulk storage tanks 71A to 75A
It is configured to be led out to the side. In addition, the outlet pipe 20
In the middle of A, a main valve 25 for the pump is provided between a connection point 36 described later and the emergency shut-off valve 7, and the main valve 25 is closed at the time of inspection of the container 3 or the like. The valve is kept open.

Reference numerals 26 and 27 denote strainers located between the connection points 21 and 36 and provided in the middle of the outlet line 20A. The strainers 26 and 27 transfer the liquefied gas F in the container 3 downstream of the outlet line 20A. For example, when the liquefied gas F is discharged to the side, foreign substances mixed in the liquefied gas F are removed, and the liquefied gas F in a clean state is compensated for being discharged to the bulk storage tanks 71A to 75A. The strainer 27 also serves as a rectifying tube for rectifying the flow of the liquefied gas F in the outlet pipe 20A.

Reference numeral 28 denotes a flow meter located between the connection point 21 and the strainer 27 and provided in the middle of the lead-out line 20A. The flow meter 28 is, for example, a turbine type, an oval type flow meter, or the like. From container 3 to bulk storage tanks 71A to 75A
The flow rate of the liquefied gas F expelled toward is measured, and the measurement signal is output to the control panel 55 described later.

Reference numeral 29 denotes a backflow prevention device which is located between the connection point 21 and the flow meter 28 and is provided in the middle of the outflow pipe 20A. The backflow prevention apparatus 29 controls the liquefied gas F in the outflow pipe 20A. The configuration is such that flow from the flow meter 28 side to the connection point 21 side (the direction of arrow C in FIG. 5) is permitted and the flow in the reverse direction is prevented.

Reference numeral 30 denotes a flow control valve provided in the middle of the outlet pipe 20B. The flow control valve 30 controls the flow rate of the liquefied gas F discharged from the container 3 to the bulk storage tanks 71A to 75A via the discharge pipe 20. To prevent the liquefied gas F from flowing excessively in the discharge pipe 20 in the direction of arrow C in FIG.

Reference numeral 31 designates a branch pipe branched from a partway of the outlet pipe 20A between the flow meter 28 and the backflow prevention device 29. The branch pipe 31 has a swivel joint 22 at the tip end.
And the flow control valve 30 is connected to an intermediate portion of the outlet pipe 20B. A bypass relief valve 32 is provided in the middle of the branch pipe line 31, and a bleeder valve 33 is provided downstream of the bypass relief valve 32.

Numeral 34 denotes a temperature measuring resistor provided at an intermediate portion of the outlet pipe 20A between the flow meter 28 and the backflow prevention device 29. The temperature measuring resistor 34 is a liquefied gas F flowing through the discharge pipe 20. And outputs a detection signal to the control panel 55 described later. Then, on the control panel 55 side, the flow rate measured by the flow meter 28 is corrected based on the detection signal from the resistance temperature detector 34, and the flow rate measurement at the reference temperature is compensated.

Reference numeral 35 denotes a connection point 3 from the middle of the lead-out line 20A.
In the branch line branched at the position 6, the branch line 35 has a connection point 21 at the distal end side and a base end side of the branch line 20 </ b> B (the branch line 2).
0A). In addition, the branch pipe 35
A bypass stop valve 39 is provided midway between the pressure gauges 37 and 38, and the bypass stop valve 39 is kept closed when the liquefied gas F is discharged. When the pressure in the lead-out line 20A excessively increases due to clogging of the strainers 26 and 27, the liquefied gas from the container 3 is opened by opening the bypass stop valve 39 based on the count value of the pressure gauge 37 and the like. F is allowed to flow to the outlet pipe 20B side, bypassing the strainers 26, 27 and the like.

Reference numeral 40 denotes a connecting pipe for connecting the dividing pipe 35 to the receiving pipe 14 side. The connecting pipe 40 has a connecting pipe 41 at one end between a pressure gauge 38 and a bypass stop valve 39 via a connecting point 41. The other end is connected between the introduction pipes 14A and 14B of the receiving pipe 14 via the connection point 15.

Reference numeral 42 denotes a vapor supply / discharge pipe connected to the guide pipe 8 in the container 3 via the emergency shut-off valve 4. The vapor supply / discharge pipe 42 has an urgent base end as shown in FIGS. A first vapor line 42A connected to the shut-off valve 4 and having a distal end extending to the outside of the container 3; and a second vapor line connected to the distal end of the vapor line 42A via the ventilation valve 43. 4
2B and a pressure gauge 44 from the middle of the first vapor line 42A.
, A fourth vapor line 42D connected to the tip end of the vapor line 42C via a gas stop valve 45, and a vapor line 42D.
And a long vapor hose 42E connected via a gas swivel joint 46 to the distal end of the gas hose.

Here, a coupling 47 for discharging the vapor generated from the liquefied gas F in the container 3 to the outside is provided at the distal end side of the vapor pipe 42B. By connecting to the storage tank 62 or the like, the vapor in the container 3 is discharged to the base storage tank 62 side through the vapor pipes 42A and 42B in the direction of arrow B in FIG. A bleeder valve 48 is connected to the distal end side of the vapor conduit 42B so as to branch off from the coupling 47 side.

A vapor (gas) safety coupling 49 is provided at the distal end of the vapor hose 42E via a safety stop valve 50. The coupling 49 is connected to the bulk storage tanks 71A to 71A of ordinary households 71 to 75. By being connected to 75A or the like, the vapor from the bulk storage tanks 71A to 75A is caused to flow into the container 3 in the direction of arrow D in FIG.

Reference numeral 51 denotes a safe operation panel provided with a main switch and the like. The safe operation panel 51 is provided on the vehicle main body 2 together with the control panel 55 and the like, and a battery power supply and the like of the vehicle main body 2 are provided via the relay terminal box 52 and the like. Connected to. And the safe driving board 51
Manually activates the work switch 53 and the emergency pump stop switch 54 to start and stop the submerged pump 6 in the container 3, and discharges the liquefied gas F in the container 3 when the submerged pump 6 is operated. It is discharged in the direction of arrow C in FIG.

Reference numeral 55 denotes a control panel supplied with power via the safe operation panel 51. The input side of the control panel 55 is connected to the flow meter 28 and the resistance temperature detector 34, and the output side is a built-in printer 5.
5A and the display 56. The control panel 55 displays the flow rate (discharge amount) of the liquefied gas F measured by the flow meter 28 on the display 56 and prints the discharge amount (including the charge) and the like by the printer 55A as necessary. Has become.

The bulk lorry 1 as a liquefied gas carrier according to the prior art has the above-described configuration. Next, an outline of a bulk supply system using the bulk lorry 1 will be described with reference to FIG.

First, the bulk lorry vehicle 1 travels to a shipping base 61 as an external facility shown in FIG.
Then, the receiving operation is performed to receive the supply of the liquefied gas F into the container 3. In this case, the shipping base 61 is provided with a large spherical base storage tank 62 and the like, and the base storage tank 62 is configured to store the liquefied gas F of 10 to 50 t (ton). A liquefied gas F loading pipe 63 and a vapor intake pipe (not shown) are provided on the bottom side of the base storage tank 62, and a liquefied gas F filling pump 64 and a flow meter 65 are provided.

When the liquefied gas F from the base storage tank 62 is received (filled) into the container 3 of the bulk truck 1, the receiving pipe 14 of the bulk truck 1 shown in FIG. And the vapor supply / discharge pipe 42 is connected to the distal end of the vapor intake pipe via a coupling 47 on the vapor pipe line 42B side.

Next, in this state, the filling pump 64 of the shipping base 61 is driven, and the liquefied gas F in the base storage tank 62 is loaded from the loading pipe 63 side through the receiving pipe 14 shown in FIG. The container 3 of the bulk lorry 1 is filled to the full (for example, 90%) level, and the vapor in the container 3 is discharged from the guide pipe 8 side in the direction of arrow B through the vapor pipes 42A and 42B. The vapor is recovered into the base storage tank 62 via the vapor intake pipe on the shipping base 61 side.

Thus, the pressure drop caused by the loading of the liquefied gas F in the base storage tank 62 can be compensated for by recovering the vapor, the pressure fluctuation in the base storage tank 62 can be suppressed, and the pressure fluctuation in the container 3 can be reduced. Can be suppressed. Further, the flow rate of the liquefied gas F unloaded from the base storage tank 62 to the bulk lorry vehicle 1 is measured by the flow meter 65, and the shipment amount of the liquefied gas F to the bulk lorry vehicle 1 is measured by the flow meter 65 at the shipping base 61 side. You can know from.

Next, the bulk lorry vehicle 1 filled with the liquefied gas F carries the liquefied gas F in the container 3 to a destination such as ordinary households 71, 72, 73 shown in FIG. In this case, the transport destination is not limited to general households 71 to 75 and the like, and may be, for example, an apartment house or a business facility such as a restaurant. In general households 71 to 75, etc., ground-type or underground-type bulk storage tanks 71A to 75A are installed, respectively. In these bulk storage tanks 71A to 75A,
For example, about 1 t of the liquefied gas F is filled.

Then, the bulk storage tank 71A of the general household 71
When the liquefied gas F is filled from the container 3 of the bulk lorry 1, the outlet hose 20C of the discharge pipe 20 is pulled out together with the vapor hose 42E of the vapor supply and discharge pipe 42 from the vehicle body 2 of the bulk lorry 1 shown in FIG. So that the leading end side of the outlet hose 20C is coupled to the coupling 23.
Is connected to the bulk storage tank 71A of the general household 71 via the
7 to a vapor outlet (not shown) of the bulk storage tank 71A.

Next, in this state, the submerged pump 6 of the bulk truck 1 is driven to discharge the liquefied gas F in the container 3 through the outlet pipes 20A and 20B of the discharge pipe 20 and the outlet hose 20C in FIG. The liquid is discharged (filled) in the direction of arrow C toward the bulk storage tank 71A, and the vapor in the bulk storage tank 71A is removed by the vapor hose 42E, the vapor conduits 42D, 42C,
It is collected in the container 3 of the bulk truck 1 in the direction of arrow D via 42A.

As a result, the pressure drop due to the discharge of the liquefied gas F in the container 3 is compensated for by recovering the vapor, and the pressure fluctuation in the container 3 can be suppressed, and the pressure fluctuation in the bulk storage tank 71A can be suppressed. be able to. Also,
The flow rate of the liquefied gas F discharged from the container 3 of the bulk lorry vehicle 1 to the bulk storage tank 71A is measured by a flow meter 28 provided in the middle of the lead-out line 20A, and the operator of the bulk lorry vehicle 1 liquefies the bulk storage tank 71A. The amount of gas F to be dispensed can be known from the value measured by the flow meter 28.

The liquefied gas F for the general household 71
When the payout is completed, the next home, general home 7
The liquefied gas F is conveyed to the bulk tank 2 by the bulk truck 1, and the same discharge is performed to the bulk storage tank 72A of the general household 72, and the discharge of the liquefied gas F to the bulk storage 73A is also performed by the general household 73 thereafter. Car 1 container 3
From the same way.

Here, when the remaining amount of the liquefied gas F is reduced on the container 3 side of the bulk lorry 1 by paying out to the general household 73, the operator of the bulk lorry 1 sends the bulk lorry to the shipping base 61 at a remote location. After returning the car 1 once and refilling the container 3 with the liquefied gas F from the base storage tank 62 of the shipping base 61 to the full (90%) level,
For example, the bulk lorry vehicle 1 is driven toward the next home 74, which is the next transport destination.

Then, the bulk storage tank 74A of the general household 74
Then, the liquefied gas F in the container 3 is discharged in the same manner as described above, and thereafter, the liquefied gas F is discharged from the container 3 of the bulk lorry vehicle 1 to the bulk storage tank 75A or the like of the ordinary household 75.

[0036]

In the above-described bulk supply system of the prior art, a flow meter 65 is provided for loading the liquefied gas F into the bulk lorry 1 as shown in FIG. It is assumed that it is performed at a large shipping base 61. When the remaining amount of the liquefied gas F decreases during transportation of the liquefied gas F to the general households 71 to 75 or the like by the bulk lorry vehicle 1, the bulk lorry vehicle 1 is transferred to the large shipping base 61 again. I am going to return.

In this case, there are a number of general filling stations for the liquefied gas F throughout the country.
It is merely equipped with a filling machine for filling a 50 kg cylinder (container) or the like with the liquefied gas F, but is not equipped with a flow meter or the like necessary for filling the bulk lorry vehicle 1 with the liquefied gas F. In order to newly install a flow meter at these general filling stations, it is necessary to largely change the equipment of the filling factory, and at present, it is poorly feasible.

For this reason, in the prior art, the loading operation of the liquefied gas F into the bulk lorry vehicle 1 is performed at a large shipping base 61 in a remote place, and the liquefied gas F is transferred to the general households 71 to 75 by the bulk lorry vehicle 1. If the remaining amount of the liquefied gas F becomes insufficient during transportation, the bulk lorry vehicle 1 must be returned to the remote shipping base 61 again, and the discharging operation of the liquefied gas F by the bulk lorry vehicle 1 is efficiently performed. There is a problem that can not be done.

The present invention has been made in view of the above-mentioned problems of the prior art. For example, by using a flow meter for dispensing equipped on a bulk lorry vehicle and the like also for receiving and distributing, a large number of general nationwide nations are provided. It is an object of the present invention to provide a liquefied gas transport vehicle that can easily perform a liquefied gas receiving operation at a filling station or the like and can efficiently carry out a liquefied gas transportation and a discharging operation.

[0040]

According to a first aspect of the present invention, a container mounted on a vehicle body for storing a liquefied gas and a liquefied gas from an external facility are stored in the container. Provided for connection to the container for receiving
A liquefied gas receiving pipe whose leading end extending to the outside of the container is a liquefied gas receiving port, and connected to the container for discharging the liquefied gas in the container to a bulk storage tank to be transported by a pump. A liquefied gas discharge pipe, and a vapor supply / discharge pipe for supplying / discharging the liquefied gas vapor to / from the container in order to suppress pressure fluctuations in the container, and a vapor supply / discharge pipe provided in the middle of the discharge pipe, A flowmeter that measures the flow rate of the liquefied gas, and a bypass pipe that is connected between the receiving pipe and the discharge pipe, and that allows the liquefied gas from the receiving port to flow through the flowmeter into the container. The configuration provided is adopted.

According to the above configuration, for example, when the liquefied gas is received into the container of the carrier from an external facility (e.g., a general filling station) which is not equipped with a flow meter, the liquefied gas is received from the inlet of the receiving pipe via the bypass pipe. The liquefied gas flowing through the flow meter on the delivery pipe side can be received in the container, and the amount of liquefied gas received (filled amount) in the container can be confirmed by the measured value of the flow meter.

According to the second aspect of the present invention, a switching valve is provided at least in the middle of the bypass pipe to selectively flow and shut off the liquefied gas from the receiving port toward the bypass pipe.

Thus, when the liquefied gas is received into the container from an external facility equipped with a flow meter (a large shipping base or the like), the switching valve cuts off the middle part of the bypass pipe, and the liquefied gas is received using the receiving pipe. Can be accepted. When the liquefied gas is received into the container from an external facility (e.g., a general filling station) that is not equipped with a flow meter, the switching valve is opened to liquefy the gas from the receiving inlet of the receiving pipe through the bypass pipe and the flow meter. Gas can be received in the container.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a high-pressure gas carrier according to the present invention will be described below in detail with reference to FIGS.

FIGS. 1 to 3 show an embodiment of the present invention. In this embodiment, the same components as those in the prior art shown in FIGS. 4 to 6 are denoted by the same reference numerals. The description is omitted.

In the drawing, reference numeral 81 denotes a bypass pipe connected between the receiving pipe 14 and the discharge pipe 20. As shown in FIGS. 1 and 2, one end of the bypass pipe 81 is located at an intermediate portion of the introduction pipe 14B. And a relay pipe 84 connected at the connection point 82 to the middle point of the outlet pipe 20A at the connection point 83 between the strainer 26 and the connection point 36. And a connecting pipe 40.

Reference numeral 85 denotes a bypass valve as a switching valve provided at an intermediate portion of the relay conduit 84. The bypass valve 85 is opened and closed by remote control or the like, and is normally kept closed when normally operated. The liquefied gas F flows in a direction indicated by an arrow E in FIG.
To prevent circulation. The bypass valve 85 allows the liquefied gas F to flow through the relay conduit 84 when the valve is opened,
The liquefied gas F is circulated in the direction of arrow E from one end of the bypass conduit 81 to the other end.

Reference numeral 86 denotes a liquid take-off / stop valve as another switching valve provided between the connection points 15 and 82 and provided in the middle of the introduction pipe 14B. The liquid take-off / stop valve 86 is connected to a bypass valve 85. The valves are opened and closed in conjunction with each other, and are kept open while the bypass valve 85 is closed. The liquid take-off / stop valve 86 allows the liquefied gas F introduced from the coupling 17 side to flow to the introduction pipe 14A via the introduction pipes 14C and 14B when the valve is opened. During the operation of receiving the gas F, the liquefied gas F is received in the direction of arrow A in FIG.

Further, the liquid take-out / in stop valve 86 is provided with a bypass valve 85.
Is held closed when the valve is opened, and in this closed state, the liquefied gas F flows through the introduction pipe 14B from the connection point 82 side to the connection point 1
Prevent circulation to the 5 side. As a result, the liquefied gas F introduced from the coupling 17 side is introduced into the introduction line 1
4C, 14B from the connection point 82 to the bypass pipe 81
Is introduced in the direction indicated by the arrow E in FIG.

Further, reference numeral 91 in FIG. 3 denotes a general filling station of the liquefied gas F. The general filling station 91 has a small storage tank 92 as compared with the base storage tank 62 of the shipping base 61, and a large number of existing storage tanks are provided nationwide. Is what it is. At the bottom of the storage tank 92, a liquefied gas F loading pipe 93 and a vapor intake pipe (not shown) are provided. However, the flow meter is not provided unlike the shipping base 61.

Here, a large number of general filling stations 91 installed nationwide are provided with a plurality of filling tanks 92 for filling a liquefied gas F in a storage tank 92 into a portable cylinder (container) of, for example, about 10 to 50 kg. These filling machines are connected to the leading end of the unloading pipe 93 via a coupling (not shown) or the like. When a normal filling operation is performed on each cylinder by a filling machine at the general filling station 91, the filling amount of each cylinder is measured not by a flow meter but by a weigh scale or the like.

The bulk lorry vehicle 1 as a liquefied gas carrier according to the present embodiment has the above-described configuration, and its basic operation is not particularly different from that of the prior art.

However, according to the present embodiment, the receiving pipe 1
In order to connect the discharge pipe 4 and the discharge pipe 20 in the middle, one end is connected to the middle of the introduction pipe 14B at the position of the connection point 82, and the other end is connected to the strainer 26 in the middle of the discharge pipe 20A. , A relay line 84 connected at a connection point 83 between the branch line 36 and the branch line 35 and the connecting line 4.
0, a bypass valve 85 is provided in the middle of the relay line 84, and the introduction line 14
Since the liquid removal / intake stop valve 86 is provided in the middle of B between the connection points 15 and 82, the following operation and effect can be obtained.

That is, when the liquefied gas F is received in the container 3 of the bulk lorry vehicle 1 at the shipping base 61 shown in FIG.
By holding the bypass valve 85 in the closed state and opening the liquid take-out / stop valve 86, the supply of the liquefied gas F can be received from the base storage tank 62 of the shipping base 61. In this case, The liquefied gas F is received in the container 3 in the direction indicated by the arrow A in FIG. 5 in the same manner as the liquefied gas F receiving operation described in the related art.

Then, with the liquefied gas F being charged, the bulk lorry vehicle 1 is operated toward general households 71, 72, 73 and the like shown in FIG. 3, and the liquefied gas F in the container 3 is stored in the bulk storage tank at these transport destinations. When the remaining amount of the liquefied gas F decreases on the container 3 side of the bulk lorry vehicle 1 due to, for example, dispensing to the general home 73 after dispensing to 71A, 72A, 73A, etc. Instead of returning the bulk lorry 1 to a certain shipping base 61, the bulk lorry 1 is driven toward a general filling station 91 already installed in a relatively nearby place.

Here, in the general filling station 91, the storage tank 92
When the liquefied gas F is received (filled) into the container 3 of the bulk lorry 1, the receiving pipe 14 of the bulk lorry 1 shown in FIG.
, And the vapor supply / discharge pipe 42 is connected to the distal end of the vapor intake pipe via a coupling 47 on the vapor pipe line 42B side. At this time, the bypass valve 85 is opened in advance, and the liquid take-out / stop valve 86 is switched to the closed state.

Next, in this state, the filling pump 94 of the general filling station 91 is driven to load the liquefied gas F in the storage tank 92 from the loading pipe 93 to the receiving pipe 14 in the direction of arrow E shown in FIG.
, The backflow prevention device 29, the connection point 21, the shunt line 3 while passing through the flow meter 28 via the introduction line 14C, the connection point 82, the relay line 84, the connection point 83, and the outlet line 20A.
5. The liquefied gas F is filled into the container 3 of the bulk lorry vehicle 1 in the direction of arrow E through the connection point 41, the connection pipe 40, the connection point 15, and the introduction pipe 14A to the full tank (for example, 90%) level. can do.

At this time, the vapor in the container 3 is discharged from the guide pipe 8 through the vapor conduits 42A and 42B in the direction indicated by the arrow B, and the vapor is discharged through the vapor intake pipe and the like on the general filling station 91 side. Through the storage tank 92. Thereby, the pressure drop due to the loading of the liquefied gas F in the storage tank 92 is compensated by the recovery of the vapor, and the pressure fluctuation in the storage tank 92 can be suppressed, and the pressure fluctuation in the container 3 can be suppressed.

At the time of receiving (filling) the liquefied gas F in the general filling station 91, the liquefied gas F introduced in the direction of arrow E from the coupling 17 side of the receiving pipe 14 is used.
Is a lead-out line 20A of the discharge pipe 20 through the relay line 84.
To flow through the flow meter 28 in the direction of arrow E, so that the flow rate of the liquefied gas F loaded from the storage tank 92 to the bulk lorry vehicle 1 can be measured by the flow meter 28, and the general filling station 91 side Then, the amount of liquefied gas F shipped to the bulk lorry vehicle 1 can be known from the value measured by the flow meter 28.

Thus, according to this embodiment, the general household 7
After discharging the liquefied gas F from the bulk lorry vehicle 1 to customers such as 1, 72, 73, etc., even if the remaining amount of the liquefied gas F is reduced on the container 3 side of the bulk lorry vehicle 1, even if the remaining amount is low as in the prior art, Bulk truck 1 to the shipping base 61
The liquefied gas F can be refilled from the storage tank 92 into the container 3 at a relatively nearby general filling station 91 or the like, and the filling amount at this time is attached to the bulk lorry vehicle 1. It can be confirmed by the flow meter 28.

After refilling of the liquefied gas F at the general filling station 91, for example, the general home 74, which is the next transport destination,
After the bulk lorry vehicle 1 is operated toward the same, the liquefied gas F in the container 3 is discharged to the bulk storage tank 74A in the same manner as in the above case, and then the bulk storage tank 75A of the general household 75 is discharged to the bulk storage tank 74A. Also, the liquefied gas F is discharged from the container 3 of the bulk lorry 1 in the same manner.

Thereafter, when the amount of the liquefied gas in the container 3 becomes insufficient, the container 3 is refilled with the liquefied gas F again at another general filling station 91 or the like which is relatively close.
The filling amount at this time can be confirmed by the flow meter 28 of the bulk truck 1.

Therefore, according to the present embodiment, the liquefied gas F can be used at the general filling stations 91 and the like nationwide by using the dispensing flow meter 28 provided in the bulk lorry vehicle 1 as the receiving flow meter 28. Can be easily performed and the bulk lorry vehicle 1 can efficiently perform the operation of receiving, transporting, and discharging the liquefied gas F.

In the above embodiment, the bypass pipe 81 connecting the receiving pipe 14 and the discharge pipe 20 is constituted by the relay pipe 84, the branch pipe 35 and the connecting pipe 40. Is not limited to this. For example, after once introducing the liquefied gas F from the storage tank 92 of the general filling station 91 to the receiving pipe 14 side, the liquefied gas F is introduced into the container 3 via the flow meter 28 and the like on the discharging pipe 20 side. As long as the configuration is acceptable, the bypass pipe may have any pipe structure.

[0065]

As described above in detail, according to the first aspect of the present invention, a receiving pipe for receiving a liquefied gas from an external facility in a container mounted on a vehicle body, and a liquefied gas in the container are provided. A discharge pipe for discharging to a bulk storage tank of a transport destination by a pump is connected by a bypass pipe, and when liquefied gas is received from a receiving inlet of a receiving pipe, liquefaction is performed via a flow meter provided in the middle of the discharging pipe. Since the gas is circulated in the container, for example, when the liquefied gas is received into the container of the transport vehicle from an external facility (e.g., a general filling station) that is not equipped with a flow meter, the liquefied gas is received in a pipe. Through the bypass pipe from the inlet to the flow meter on the discharge pipe side, the liquefied gas passing through the flow meter can be received in the container, and the amount of liquefied gas received (filled amount) in the container can be reduced. It can be confirmed by measurement of the amount meter. Therefore, the liquefied gas transport vehicle is equipped with a flow meter for dispensing, which is usually equipped with a liquefied gas carrier, so that liquefied gas can be easily received at many general filling stations nationwide. Transportation work, payout work, etc. can be efficiently performed.

According to the second aspect of the present invention, a switching valve is provided at least in the middle of the bypass pipe for selectively flowing and shutting off the liquefied gas from the receiving port to the bypass pipe side. When liquefied gas is received into the container from an external facility (large shipping base) equipped with a flow meter, the switching valve cuts off the middle part of the bypass pipe, and the liquefied gas receiving work can be easily performed by the receiving pipe. When the liquefied gas is received into the container from an external facility (such as a general filling station) that is not equipped with a flow meter, the switching valve is opened, and the liquefied gas is passed from the receiving inlet of the receiving pipe through the bypass pipe and the flow meter. Can be received in the container, and the liquefied gas can be efficiently received, transported, and discharged.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a piping structure and the like of a bulk truck according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part in FIG.

FIG. 3 is an explanatory diagram of a liquefied gas receiving, transporting, and discharging operation by the bulk lorry vehicle shown in FIG. 1;

FIG. 4 is an overall configuration diagram showing a piping structure and the like of a conventional bulk truck.

FIG. 5 is an enlarged view of a main part in FIG. 4;

FIG. 6 is an explanatory diagram of a liquefied gas receiving, transporting, and discharging operation by the bulk lorry vehicle shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bulk trolley car (liquefied gas carrier) 2 Vehicle main body 3 Container 4,5,7 Emergency shut-off valve 6 Submerged pump (pump) 8 Guide pipe 14 Receiving pipe 17 Coupling (receiving port) 20 Discharge pipe 28 Flow meter 42 Vapor Supply / discharge piping 61 Shipping base (external facility) 62 Base storage tank 63,93 Loading piping 64,94 Filling pump 65 Flow meter 71,72,73,74,75 General household (transportation destination) 71A, 72A, 73A, 74A, 75A Bulk storage tank 81 Bypass piping 82,83 Connection point 84 Relay line 85 Bypass valve (switching valve) 86 Liquid take-out / in stop valve (switching valve) 91 General filling station (external facility) 92 Storage tank

Claims (2)

(57) [Claims] 1. A container mounted on a vehicle body for containing a liquefied gas, and connected to the container for receiving a liquefied gas from an external facility into the container. The container is connected to the outside of the container. A liquefied gas receiving pipe whose leading end side is a liquefied gas receiving port, and a liquefied gas discharge connected to the container for discharging the liquefied gas in the container to a bulk storage tank at a transport destination by a pump. A pipe, a vapor supply / discharge pipe for supplying / discharging the vapor of the liquefied gas into / out of the vessel, and a gas supply / discharge pipe provided in the middle of the discharge pipe, for controlling a flow rate of the liquefied gas. A liquefied gas configured to include a flow meter for measuring, and a bypass pipe connected between the receiving pipe and the discharge pipe and allowing the liquefied gas from the receiving port to flow through the flow meter into the container.搬車. 2. A switching valve for selectively flowing and shutting off liquefied gas from the receiving port to the bypass pipe is provided in the middle of the bypass pipe and the receiving pipe.
The liquefied gas carrier described in 1.