KR200456786Y1 - LNG storage tank with a improved pressure control device - Google Patents

Abstract

The present invention relates to an LNG storage container for storing liquefied natural gas, and more particularly, to install a weight loss container that provides an empty space inside the inner container that forms the storage container, and from the weight loss container to the outside of the storage container. By extending the weight reducing pipe, the weight reducing pipe is installed in connection with the supply pipe of the vaporized fuel, so that the effective pressure control function of the storage container by the weight reducing container can be sufficiently achieved, and the efficient use of the vaporized fuel stored inside the weight reducing container is possible. It is possible to facilitate the filling operation of the liquefied fuel through the LNG storage container and to improve the filling rate by inserting the weight loss container into the inner container in a sealed state, as well as ensuring the reliable operation of the weight loss device and reducing the weight. Implement improved weight loss mechanisms to facilitate the repair and maintenance of instruments. The comparison relates to LNG storage containers.

To this end, the present invention, the heat insulating material (3) is inserted between the outer container (2) and the inner container (4), the weight reduction vessel 10 is inserted into the inner container (4) is installed, the outer The liquefied fuel filling tube 7 is installed through the outer end of the inner container 4 from the outside of the container 2 to the outer end of the outer container 2 from the upper and lower ends of the inner container 4. A discharge pipe 9 and a liquefied fuel discharge pipe 8 are installed therethrough. The liquefied fuel discharge pipe 8 is provided with a discharge valve 8a and a pressure regulator 8b. The pressure regulator 8b serves as an engine from the pressure regulator 8b. The fuel supply pipe 13 for supplying the elongated is installed, the fuel supply pipe 13 is an LG storage container (1) installed in connection with the vaporization fuel discharge pipe (9), the weight reduction vessel 10 of the LG storage container (1) The weight loss pipe 11 extends through the inner container 4 and the outer container 2 from the inner side, and The amount pipe 11 is connected to the vaporization fuel discharge pipe 9 and the fuel supply pipe 13 by a pipe connection block 14, the pipe connection block 14 has an exhaust pipe 17 having an on-off valve 17a. A) is further connected and installed.

LNG, storage containers, weight reduction containers

Description

LNG storage tank with a improved pressure control device

The present invention is to install a weight loss container that provides an empty space inside the inner container of the LNG storage container for storing Liquefied Natural Gas (LNG), while extending the weight reduction pipe from the weight loss container to the outside of the storage container In addition, this reducing pipe is installed in connection with the supply pipe of vaporized fuel, so as to control the pressure resistance of the LNG storage container, and to effectively use the vaporized fuel, and to improve the filling rate and easy filling of liquefied fuel through the LNG storage container. In addition, the present invention relates to an LNG storage container having an improved weight reduction mechanism for ensuring a reliable operation of the weight reduction mechanism and easily performing repair and maintenance work of the weight reduction mechanism.

In general, in order to use natural gas as fuel for a vehicle or the like, the natural gas is liquefied at a temperature of -150 ° C or lower, which is its boiling point, and the liquefied natural gas (hereinafter referred to as "liquefied fuel") is used in a vehicle or the like. It is used to fill the inside of the fuel tank is mounted, and the fuel tank is to use the LENG storage container that can suppress the vaporization of liquefied fuel to the maximum.

The LNG storage container typically has a dual structure of an inner container in which liquefied fuel is substantially stored, and an outer container protecting the inner container from the outside, and insulates an insulating material in a space corresponding between the inner container and the outer container. By forming the space in a vacuum state in the inserted state, it has a structure to prevent the vaporization of the liquefied fuel stored in the inner container.

In addition, one side of the LENG storage container for the fuel pipe for discharging the liquefied fuel through the inner container and the liquefied fuel and vaporized fuel stored in the inner container from the inner container for supply to the engine, such as a vehicle While a manifold including piping is provided, a separate protective case for protecting the manifold is also installed on the outer container side.

However, even if the LNG storage container has a double container structure in a vacuum state as described above, it is difficult to completely insulate it from the outside temperature, and the liquefied fuel may be shaken due to the fluctuation of liquefied fuel due to the vibration generated during operation of the vehicle. As part of the vaporization, the internal pressure of the storage container increases, which causes a risk that the storage container can be easily broken even with a small impact.

As a means for suppressing the internal pressure increase caused by the vaporization of the liquefied fuel as described above, the inner container by installing a weight loss container that provides an empty space, usually about 10% of the total volume of the inner container inside the inner container In the LNG storage container, a weight reduction mechanism for applying an elevated pressure to the weight loss container has been applied, and in recent years, the application of such a weight reduction mechanism has been legally mandated.

As a representative example of a weight reduction mechanism installed in an LNG storage container as described above, the internal space of the weight reduction container is formed at a low pressure by using a flow rate generated when the liquefied fuel is charged, and then the internal pressure generated after the liquefied fuel is filled. The rising pressure of the vessel was applied to the weight reduction vessel side, US Patent Publication No. 7,131,277 (Registration Date: November 07, 2006) and Domestic Patent Publication No. 10-679459 (Registration Date: January 31, 2007) It is known and described.

As described above, the conventional weight loss mechanism installed in the LNG storage container uses the flow rate generated during the filling of the liquefied fuel so that the inner space of the weight reduction container can be formed at a low pressure state, and the filling tube and the weight reduction container of the liquefied fuel are inside. It is connected to the inside of the container by the nozzle unit, and thus the internal space of the weight reduction container has a structure in communication with the internal container by the filling tube.

However, when the weight reduction mechanism is installed as described above, in the process of filling the liquefied fuel through the filling tube, the vaporized fuel and the liquefied fuel stored in the weight reduction container are stored inside by the pressure drop of the nozzle part according to the rapid flow rate of the liquefied fuel. Although exited to the container side, after the filling of the liquefied fuel is completed, the phenomenon that the liquefied fuel flows back into the interior of the weight reduction space through the nozzle portion.

When the above phenomenon occurs, as the liquefied fuel flows into the inside of the weight loss container which should be formed in a low pressure empty space, the internal pressure of the weight loss container rises more than necessary in a relatively quick time, When the pressure of the inner container rises according to the vaporization of the liquefied fuel, it causes a problem that the weight loss vessel can not effectively control the rise of the internal pressure.

 In order to prevent the problem that the liquefied fuel flows back into the weight reduction vessel as described above, the end side of the filling tube into which the liquefied fuel is injected extends to the inner upper portion of the inner container, and then the end side of the filling tube is connected to the liquefied fuel. As it should not be immersed, the filling operation of the liquefied fuel is difficult, as well as the filling rate of the liquefied fuel is also lowered because the liquefied fuel can not be filled to 100% in the inner container.

In addition, liquefied fuel or vaporized fuel introduced into the weight loss container due to the pressure increase of the inner container is almost impossible to be used as a practical fuel by supplying to an engine such as a vehicle. It causes problems.

In particular, since the nozzle part serving as the weight reduction mechanism is inserted into the inner container together with the filling tube and the weight reduction container, the nozzle which damages the pipe part in which the nozzle part is installed due to the impact or vibration generated when the vehicle is running, or provides a narrow neck part. When a situation in which a passage is blocked by a foreign material, etc. occurs, there was a problem that a method for quickly checking and coping with this problem was not provided.

Due to the above factors, it is difficult to ensure the reliable operation of the weight loss mechanism when using the LNG storage container, as well as to reduce the filling tube and the nozzle portion by disassembling the external container and the inner container during repair or maintenance work of the weight loss mechanism. By being exposed with the container, there was a problem that the repair or maintenance work of the weight loss device is also very difficult.

The present invention is devised to solve the above-mentioned problems, and installs a weight reduction container that provides an empty space inside the inner container constituting the LENG storage container, while reducing the weight reduction pipe from the weight reduction container to the outside of the storage container By improving the structure of the weight reduction mechanism so that the weight reduction pipe is installed in connection with the supply pipe of the vaporized fuel, the pressure reduction capacity of the vaporized fuel stored in the weight loss container while maintaining the pressure resistance control function of the storage container by the weight reduction container is improved. Efficient use is possible, and the weight loss container is inserted into the inner container in a sealed state to facilitate the easy filling operation of the liquefied fuel and the improvement of the filling rate through the LNG storage container, as well as the reliable operation of the weight loss device. To ensure the quality of the equipment and to facilitate the repair and maintenance of the weight loss device. The technical problem is to provide a storage container.

The present invention as a means for solving the above technical problem, the heat insulating material is inserted between the outer container and the inner container, the weight loss container is inserted into the inner container of the inner container, the outer container of the inner container A liquefied fuel filling pipe is installed through the inner lower end, and a vaporized fuel discharge pipe and a liquefied fuel discharge pipe are installed through the inner and upper ends of the inner container to the outer side of the outer container. A discharge valve and a pressure regulator are installed in the liquefied fuel discharge pipe. A fuel supply pipe for supplying fuel to the engine is extended from the pressure regulator, and the fuel supply pipe is an LNG storage container connected to a vaporized fuel discharge pipe, wherein the inner container and the external container are stored from the inside of the LNG storage container. A reduction pipe is installed to extend through the pipe, and the reduction pipe is connected to the pipe. It is connected to the vaporized fuel discharge pipe and the fuel supply pipe by being installed, characterized in that the pipe connecting block is further provided with an exhaust pipe having an opening and closing valve, the reducing pipe is connected to the auxiliary pipe is installed, the auxiliary pipe of the A safety valve is installed at the end side, and the reducing pipe is provided with an on-off valve and a pressure gauge, respectively, and the fuel supply pipe extending through the pipe connecting block to the engine is an overpressure circuit breaker, a fuel supply valve and pressure and flow control. It is characterized in that the valve is installed.

According to the present invention as described above, since the filling operation of the liquefied fuel can be performed in a state in which the spaces of the inner container and the reducing container are blocked from each other, the liquefied fuel is filled while the inner container and the reducing container are connected to the nozzle unit. Compared to the conventional case, the filling operation of the liquefied fuel can be performed more easily, while the filling of the liquefied fuel is possible over the entire volume of the inner container, thereby improving the filling rate of the liquefied fuel.

In addition, when the vaporized fuel is discharged along the fuel supply pipe by the operation of the engine, the vaporized fuel stored in the weight loss container flows into the pipe connection block along the weight reduction pipe during the pressure adjustment process of the internal container, and then the fuel supply pipe and the vaporization Since the gas can be supplied to the engine together with the vaporized fuel supplied from the fuel discharge pipe, the vaporized fuel stored in the weight reduction container can be utilized as a practical fuel.

Therefore, since the internal pressure of the weight reduction vessel may not be continuously increased with time, and may be lowered in proportion to the amount of vaporized fuel, the weight reduction vessel may continuously receive the increased pressure of the internal vessel, thereby reducing the weight loss. In addition to the effect of improving the pressure-resistant control function by the container, there is also an effect of preventing the waste of fuel by the efficient use of the vaporized fuel.

In particular, since the weight reduction pipe connected to the weight reduction vessel is installed outside the LENG storage vessel together with the pressure gauge, it is effective to quickly check whether the weight loss mechanism is abnormal or malfunction with a pressure gauge, and it is necessary to disassemble the external container and the inner container. It is possible to ensure the reliable operation of the weight loss device by simply performing repair and maintenance on the weight loss pipe without having a very useful effect.

Hereinafter, with reference to the accompanying drawings, the present invention for achieving the above object will be described in detail.

First, in the case of the LENG storage container 1 according to the present invention, as shown in FIG. 1, an inner container 4 in which liquefied fuel is stored, and an outer container protecting the inner container 4 from the outside ( 2) is formed in a double structure, the space corresponding to the space between the inner container (4) and the outer container (2) is formed in a vacuum state, while the heat insulating material (3) for the insulation of the outside is inserted into the space Is installed.

In order to create a space corresponding to the space between the inner container 4 and the outer container 2 in a vacuum state, the outer container 2 may be provided with a port for vacuum (not shown) , Between the inner container 4 and the outer container 2, a getter (Getter) may be installed together with the heat insulating material (3) to absorb and remove the residual gas during the vacuum composition by the vacuum port.

The insulation 3 is preferably applied to MLI (Multi Layer Insulation) as a double shielding material made of aluminum (Al) and glass fiber, but conducts heat, radiates and convection so that the liquefied fuel can be stored for about a week or more. Any material may be used as long as it can block the heat insulating material, and the heat insulating material 3 is preferably inserted and installed over the entire space between the inner and outer containers 2 and 4.

In addition, a level gauge 6 is inserted into the inner container 4, and the level gauge 6 transmits an amount of liquefied fuel charged in the inner container 4 to an electrical signal. It becomes a means for displaying to the outside, the container support (5) is installed on both sides of the inner container (4) so that the inner container (4) can be safely installed and supported with the outer container (2).

The vessel holder 5 is a rod-shaped brace connected to the outer vessel 2 to be inserted and supported by a pipe-shaped structure provided on the inner vessel 4 side, the inner vessel 4 along the longitudinal direction The contraction and expansion of the container support (5) is preferably buffered to ensure the safety according to the dimensional deformation of the inner container (4).

Meanwhile, as illustrated in FIGS. 1 and 2, one side (right side in the drawing) of the LENG storage container 1 is filled with a piping for filling the liquefied fuel through the inner container 4, and an inner container. A manifold is provided that includes fuel piping for discharging liquefied fuel and vaporized fuel stored in (4) from the inner container 4 and supplying the same to an engine such as a vehicle.

In FIG. 1, the manifold portion is illustrated in FIG. 2 more clearly, and the manifold portion is not shown separately in order to avoid the complexity of the drawing. As shown, the protection case that can protect the manifold can also be installed in addition to one side of the outer container (2).

As shown in FIGS. 1 and 2, the manifold includes a liquefied fuel filling tube 7 installed through the outer end of the outer container 2 from the outer end of the inner container 4, and the inner container 4. It includes a vaporized fuel discharge pipe (9) and liquefied fuel discharge pipe (8) which is installed penetrating from the inner upper, lower end to the outer side of the outer container (2).

And, as shown more clearly in FIG. 2, the filling port 12 of the liquefied fuel is provided on the end side of the liquefied fuel filling tube (7) located outside the storage container (1), A check valve 7a is installed at a position past the filling port 12 to prevent backflow of liquefied fuel during filling.

In addition, the liquefied fuel discharge pipe 8 extending to the outside of the LENG storage container 1 is provided with two discharge valves (8a) are connected at an angle of 90 degrees by the elbow pipe, one of the discharge valve (8a) The pressure regulator 8b is provided at the side), and the fuel supply pipe 13 which supplies fuel from the pressure regulator 8b to the engine of a vehicle etc. is extended.

The discharge valve 8a installed together with the pressure regulator 8b of the discharge valve 8a is responsible for vaporizing the liquefied fuel in the pressure regulator 8b and supplying it to the engine, and the other discharge valve ( 8a) may be a vent valve for discharging liquefied fuel to the outside when the liquefied fuel is overcharged, and supplies the liquefied fuel to an evaporator (not shown) mounted on a vehicle together with the storage container 1. It may be a valve to perform additional fuel supply.

In other words, with the discharge valve 8a installed together with the pressure regulator 8b as the fuel supply main valve, the other discharge valve 8a as a vent valve for liquefied fuel or an additional fuel supply valve. It can be used, the pressure regulator (8b) is to operate when the discharge pressure of the liquefied fuel is a certain pressure or more to perform the function of primary vaporizing the liquefied fuel.

As described above, the fuel supply pipe 13 extending from the pressure regulator 8b of the liquefied fuel discharge pipe 8 is connected to the vaporized fuel discharge pipe 9 again, and thus stored in the internal container 4 of the LNG storage container 1. It is made to supply liquefied fuel and vaporized fuel generated therefrom to an engine such as a vehicle.

The fuel supply pipe 13 is located on the other side of the storage container 1 along the longitudinal direction of the storage container 1 from one side (right end in FIG. 1) of the L engine storage container 1 in which the manifold is installed (FIG. 1). It is most preferable to install the "⊂" -shaped pipe extending in the form of the left end, and then re-extended to one side of the storage container 1 by turning in the opposite direction.

When the fuel supply pipe 13 is installed in the above manner, the fuel discharged from the pressure regulator 8b of the liquefied fuel discharge pipe 8 flows along the fuel supply pipe 13 to provide sufficient heat exchange with the outside. It can be vaporized in a more suitable state, which provides a more advantageous advantage in terms of use of the fuel.

As a component corresponding to the main part of the present invention, the weight loss container 10 is inserted into an inner upper part of the inner container 4 constituting the LNG storage container 1 and the upper part in the drawing, while the inner side of the weight loss container 10 is installed. From the inner container (4) and the outer container (2) to extend from the reducing pipe (11), the reducing pipe (11) extending in this way by the pipe connection block 14 vaporized fuel discharge pipe (9) and It is to be connected to the fuel supply pipe (13).

Position and shape of the liquefied fuel filling tube (7), the liquefied fuel discharge pipe (8) and the vaporized fuel discharge pipe (9), including the reduction pipe (11) extending through the outer container (2) is shown in FIG. The pipe connection block 14 is not limited thereto, and it is preferable to use a joint pipe material through which the reduction pipe 11, the fuel supply pipe 13, and the vaporized fuel discharge pipe 9 can be connected and communicated with each other.

In addition, the reducing pipe 11 is provided with an on-off valve (11a) and a pressure gauge (11b), respectively, the on-off valve (11a) is the internal space of the weight reduction vessel (10) is reduced pipe (11) and pipe connection block (14) and the on-off state of selectively communicating with the internal container (4) via the vaporized fuel discharge pipe (9), the pressure gauge (11b) is the internal pressure of the weight loss container (10) It is a means to display the outside.

In the drawing, the reducing pipe 11 is connected to the pipe connecting block 14 by the connecting pipe 15, and the opening and closing valve 11a is also shown to be installed on the connecting pipe 15, The connecting pipe 15 may be considered to be an extension of the weight reduction pipe 11.

In other words, although the reducing pipe 11 itself may be directly connected to the pipe connecting block 14, the reducing pipe 11a, the pressure gauge 11b, the auxiliary pipe 16, etc. may be reduced by using the joint pipe 15a. While allowing the pipe 11 to be easily installed, the connection pipe 15 is also used to more easily perform the connection and disconnection of the reducing pipe 11 and the pipe connecting block 14.

In addition, an exhaust pipe 17 is additionally installed and connected to the pipe connection block 14 together with the reducing pipe 11, the fuel supply pipe 13, and the vaporized fuel discharge pipe 9, and the open / close valve is connected to the exhaust pipe 17. When the bar 17a is installed, the exhaust pipe 17 is responsible for discharging the pressure of the weight reduction container 10 and the inner container 4 to the outside before the liquefied fuel filling operation.

As a component corresponding to another essential part of the present invention, the auxiliary pipe 16 is connected to the reduction pipe 11 at a position adjacent to the pressure gauge 11b, while a safety valve is provided at the end side of the auxiliary pipe 16. (16a) and (16b) are provided, and the safety valve (16a) and (16b) have a function of discharging the internal pressure of the weight reduction vessel (10) to the outside when the internal pressure of the weight reduction vessel (10) exceeds a set value. Will be in charge.

In the drawing, two safety valves, that is, the primary safety valve 16a and the secondary safety valve 16b, are installed at both ends of the auxiliary pipe 16, which means that when one safety valve malfunctions, the other safety valve This ensures that the safety function is even more guaranteed.

The operating pressure of the primary safety valve 16a is about 1.6 MPa (230 psig), and the operating pressure of the secondary safety valve 16 b is about 2.4 MPa (350 psig). The safety valves 16a and 16b may be solenoid valves automatically controlled by the pressure gauge 11b, valves of a rupture disk type, and other types of safety valves may be applied.

As a component corresponding to still another essential part of the present invention, the overpressure circuit breaker 13b, the fuel supply valve 13a, and the pressure along the fuel supply pipe 13 extending through the pipe connecting block 14 to the engine of the vehicle and the like. Overflow control valve (13c) is to be installed sequentially.

The overpressure circuit breaker 13b automatically adjusts the supply pressure of the vaporized fuel when the pressure of the vaporized fuel supplied to the engine is excessively increased, and the fuel supply valve 13a is It provides a manual opening and closing means of the fuel supply pipe 13, the control valve (13c) is a valve that is automatically closed when a sudden flow rate and pressure rise.

By installing the overpressure circuit breaker 13b and the control valve 13c in the fuel supply pipe 13 corresponding to the position past the pipe connecting block 14 as described above to control the pressure and flow rate of the vaporized fuel to double, vaporized fuel By adjusting the pressure and flow rate to the most appropriate state, it is possible to effectively prevent overload or failure of the engine.

On the fuel supply valve 13a provided in the fuel supply pipe 13, the on-off valve 11a for the reduction pipe 11, the on-off valve 17a and the liquefied fuel discharge pipe 8 provided on the exhaust pipe 17. The discharge valve 8a to be installed is most preferably using a manual ball valve, but other types of valves may be applied as necessary.

When the liquefied fuel is to be charged through the LNG storage container 1 of the present invention having the above configuration, the opening and closing valve 17a installed in the exhaust pipe 17 is opened to open the inner container 4 and the weight reduction container ( The pressure of 10) is first discharged to the outside, and then the filling port 12 of the liquefied fuel filling tube 7 is connected to a filling tank or a filling device not shown to fill the liquefied fuel.

During the filling operation of the liquefied fuel as described above, the on / off valve 11a and the liquefied fuel discharge pipe for the fuel supply valve 13a and the reduction pipe 11 of the fuel supply pipe 13 including the on / off valve 17a of the exhaust pipe 17. The discharge valve (8a) of (8) is set in a closed state, thereby enabling the filling operation of the liquefied fuel in a state in which the space of the inner container (4) and the weight loss container (10) is blocked from each other. .

Since the filling operation of the liquefied fuel can be performed in a state in which the spaces of the inner container 4 and the reducing container 10 are blocked from each other as described above, the liquefied fuel is filled while the inner container and the reducing container are connected to the nozzle unit. Compared to the conventional case, the filling of the liquefied fuel can be performed more easily, and the filling rate of the liquefied fuel can be improved since the filling of the liquefied fuel is possible over the entire volume of the inner container 4. .

After the filling operation of the liquefied fuel is completed in the above manner, the on / off valve 11a for the fuel supply valve 13a and the reducing pipe 11 of the fuel supply pipe 13 and the discharge valve 8a of the liquefied fuel discharge pipe 8 are completed. When the valve is set in such a state, the fuel can be supplied to the engine of the vehicle through the liquefied fuel discharge pipe 8, the vaporized fuel discharge pipe 9, and the fuel supply pipe 13. .

When the liquefied fuel filled in the inner container 4 is vaporized in the process of using the LNG storage container 1 in the same manner as described above, the pressure of the inner container 4 is increased, and a part of the vaporized fuel is vaporized fuel discharge pipe 9 ) Flows into the interior of the weight reduction vessel 10 through the pipe connection block 14 and the weight reduction pipe 11, and thus the weight reduction vessel 10 can appropriately control the pressure rise of the inner vessel 4. do.

In addition, when the vaporized fuel is discharged along the fuel supply pipe 13 by the operation of the engine or the like, the vaporized fuel stored in the weight reduction container 10 is introduced into the pipe connection block 14 along the reduction pipe 11. Next, since it is supplied to the engine together with the vaporized fuel supplied from the fuel supply pipe 13 and the vaporized fuel discharge pipe 9, it is possible to utilize the vaporized fuel stored in the weight reduction container 10 as a substantial fuel.

Therefore, since the internal pressure of the weight reduction container 10 may not be continuously increased with time, and may be lowered in proportion to the amount of vaporized fuel used, the weight reduction container 10 may continuously increase the pressure of the internal container 4. It can be accepted, and thus, it is possible to further improve the internal pressure control function by the weight loss container 10, as well as to prevent waste of fuel by efficient use of vaporized fuel.

In particular, since the weight reduction pipe 11 connected to the weight reduction container 10 is installed outside the L & G storage container 1 together with the pressure gauge 11b, the pressure gauge 11b quickly checks whether the weight loss mechanism is abnormal or malfunctions. Of course, it is possible to ensure the reliable operation of the weight loss mechanism only by performing repair and maintenance on the weight reduction pipe 11 without having to disassemble the outer container 2 and the inner container 4. .

1 is a side cross-sectional view of the LENG storage container according to the present invention.

Figure 2 is a front view of the LENG storage container according to the present invention.

Description of the Related Art

1: L & G storage container 2: External container 3: Insulation

4 inner container 5 container support 6 level gauge

7: liquefied fuel filling pipe 7a: check valve 8: liquefied fuel discharge pipe

8a: discharge valve 8b: pressure regulator 9: vaporized fuel discharge pipe

10: weight reduction container 11: weight reduction pipe 11a, 17a: on-off valve

11b: pressure gauge 12: filling port 13: fuel supply pipe

13a: fuel supply valve 13b: overpressure circuit breaker 13c: control valve

14 pipe connection block 15 connector 15a joint pipe

16: auxiliary piping 16a: primary safety valve 16b: secondary safety valve

17 exhaust pipe

Claims (4)

The heat insulating material 3 is inserted between the outer container 2 and the inner container 4, and the weight reduction container 10 is inserted into the inner container 4, and the outer side of the outer container 2 is installed. The liquefied fuel filling tube 7 penetrates from the upper end of the inner container 4 to the inner lower end of the inner container 4, and liquefies with the vaporizing fuel discharge pipe 9 from the upper and lower ends of the inner container 4 to the outer side of the outer container 2. A fuel discharge pipe 8 is installed therethrough, the liquefied fuel discharge pipe 8 is provided with a discharge valve 8a and a pressure regulator 8b, and a fuel supply pipe for supplying fuel to the engine from the pressure regulator 8b ( 13) is extended and the fuel supply pipe 13 is in the LNG storage container (1) installed in connection with the vaporized fuel discharge pipe (9), The weight reduction pipe 11 extends through the inner container 4 and the outer container 2 from the inside of the weight reduction container 10 of the LNG storage container 1, The reduction pipe 11 is connected to the vaporization fuel discharge pipe 9 and the fuel supply pipe 13 by a pipe connection block 14, The pipe connecting block (14) of the LENG storage container having an improved reduction mechanism, characterized in that the exhaust pipe 17 is further installed and installed with an on-off valve (17a). The LG storage container according to claim 1, wherein the reducing pipe (11) is provided with an on / off valve (11a) and a pressure gauge (11b), respectively. According to claim 1 or 2, wherein the reducing pipe 11 is connected to the auxiliary pipe 16, characterized in that the safety valve 16a, 16b is provided on the end side of the auxiliary pipe (16). LNG storage container having an improved weight reduction mechanism. The fuel supply pipe 13 extending to the engine via the pipe connecting block 14 is provided with an overpressure circuit breaker 13b, a fuel supply valve 13a and a control valve 13c for pressure and flow rate. LNG storage container having an improved weight reduction mechanism characterized in that.

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