KR20230078909A - Pressure boosting device for cryogenic liquid fuel tank - Google Patents

Abstract

The present invention relates to a pressure boosting device for a cryogenic liquid fuel tank. According to the present invention, when installed in the cryogenic liquid fuel tank and the internal pressure is lowered, the fuel in the cryogenic liquid fuel tank is moved, vaporized, and then introduced into the inside again. A booster device for increasing internal pressure, comprising: a first pressure-up transfer pipe through which the fuel inside the cryogenic liquid fuel tank is introduced and moved; It is connected to the first boosting pipe, fuel is introduced from the first boosting pipe, and the boost module moves the fuel by the movement of the magnet slider to vaporize, and the boost module is connected to the cryogenic liquid fuel tank. It is possible to provide a boosting device including a second boosting transfer pipe through which the fuel introduced from the boosting module is moved and vaporized to be introduced into the cryogenic liquid fuel tank.

Description

Pressure boosting device for cryogenic liquid fuel tank}

The present invention relates to a pressure boosting device for a cryogenic liquid fuel tank, and more particularly, by forcibly moving fuel inside a fuel tank to the outside through a magnet slider to vaporize it through a heat exchange action and injecting the fuel back into the inside in the form of a gas, It relates to a pressure boosting device for a cryogenic liquid fuel tank capable of increasing the internal pressure over time.

General industrial cryogenic tanks (e.g. mobile tanks for liquid nitrogen or liquid oxygen) use the internal pressure of vaporized gas to transfer cryogenic liquid to another container. As the pressure gradually decreases, the speed decreases. Because of this phenomenon, a situation arises in which the pressure must rise and then be transferred again.

In order to accelerate the internal pressure rise under this circumstance, a copper pipe with high heat transfer rate is used to draw the liquid from the inner tank through the inner and outer tubes to the outside of the outer tank, where it is naturally vaporized and then leads to the inner tank again.

When there is no such device, it is possible to transfer the liquid to another container at a faster rate, but this device also has a limitation as an additional natural vaporization device, so there is a problem in that the speed is slowed down. In addition, it can bring about the opposite effect of reducing the insulation performance of the tank, so it is rarely used.

In addition, it is possible to have a pump-type forced transfer device and a heat exchanger to increase the pressure inside the tank, but it is not easy to apply in practice because a complicated and bulky gas leakage prevention device is required due to the internal pressure of 2,000 kPa (20 bar) or more. .

Therefore, it is necessary to develop a pressure boosting device having a simple structure and capable of increasing the pressure within a short time without deteriorating the insulation performance of the tank.

Korea Patent Registration No. 10-2210854 Fuel tank having a fuel boosting module (2019.09.18)

In order to solve the above problems, the present invention forcibly moves the fuel inside the fuel tank to the outside through a magnet slider so that it is vaporized through a heat exchange action, and then injects the fuel back into the inside in the form of a gas, thereby quickly increasing the internal pressure. An object of the present invention is to provide a booster for a cryogenic liquid fuel tank capable of

In order to solve the above problems, the pressure boosting device for a cryogenic liquid fuel tank according to an embodiment of the present invention is installed in the cryogenic liquid fuel tank and, when the internal pressure is lowered, moves and vaporizes the fuel in the cryogenic liquid fuel tank, and then again 1. A pressure boosting device for increasing internal pressure by introducing fuel into the inside of the cryogenic liquid fuel tank, comprising: a first pressure rising pipe through which the fuel inside the cryogenic liquid fuel tank is introduced and moved; It is connected to the first boosting pipe, fuel is introduced from the first boosting pipe, and the boost module moves the fuel by the movement of the magnet slider to vaporize, and the boost module is connected to the cryogenic liquid fuel tank. It is possible to provide a boosting device including a second boosting transfer pipe through which the fuel introduced from the boosting module is moved and vaporized to be introduced into the cryogenic liquid fuel tank.

In addition, it may further include a front end valve installed in the first pressure-up moving pipe, which can be opened and closed according to the internal pressure of the cryogenic liquid fuel tank.

Here, the boosting module is formed in the shape of a through-pipe having a length, and an upper space located at the top as an internal space and a lower space connected to the upper space and located at the bottom are formed. a cylinder part to which a first boosting pipe and a second boosting pipe are connected; a magnet slider installed outside the cylinder and moving up and down along the cylinder; a plunger installed in the upper space and moved up and down according to the movement of the magnet slider; An upper moving valve that is installed in the upper space and moves up and down according to the movement of the plunger, and is blocked and opened according to the movement of the plunger, and is installed in the lower space and moves up and down according to the movement of the plunger, and is opened and closed according to the movement of the plunger. It may include a lower moving valve that is blocked.

In addition, in the boosting module, when the magnet slider moves upward, the upper moving valve is blocked as the plunger moves upward, so that the fuel in the upper space is moved to the first boosting moving pipe, and the lower moving valve is opened and the fuel in the lower space is moved to the lower side of the upper moving valve in the upper space, and when the magnet slider is moved downward, the upper moving valve is opened as the plunger is moved downward and the upper moving valve is moved to the lower side. It is characterized in that the fuel located at the lower side of the valve is moved upward, and the lower moving valve is closed.

In addition, the cylinder portion is formed in a tubular shape having a length, the cylinder having the upper space and the lower space formed; It is inserted and fixed to the bottom of the cylinder to connect the first boosting shift pipe, and is inserted and fixed to a bottom plug blocking the bottom shift valve when the bottom shift valve is seated and an upper part of the cylinder to connect the second boost shift pipe. A top plug may be included.

In addition, the cylinder is formed to protrude inward along the inner circumference between the upper space and the lower space, to limit the upward movement of the lower movement valve and to limit the lower movement of the upper movement valve. It may include a separation preventing protrusion formed to protrude outward along the circumference to support the magnet slider and prevent separation.

In addition, the lower plug may include a lower connecting pipe to which the first boosting moving pipe is connected; A lower plug body formed on the upper side of the lower connecting pipe and a lower plug insertion portion formed on the upper side of the lower plug body and inserted into the cylinder, and in close contact with the lower movement valve to block the lower movement valve. .

In addition, the upper plug may include: an upper connecting pipe to which the second boosting moving pipe is connected; An upper plug body formed below the upper connection pipe and an upper plug insertion portion formed below the upper plug body and inserted into the cylinder.

In addition, the upper movable valve, the upper valve body is formed in a hollow tubular shape with an upper surface blocked, and has a longer length than the plunger; one or more upper valve opening holes formed along the circumference of the upper side of the upper valve body, blocked when moved upward by the plunger and opened when moved downward; An upper hanging part formed on the upper end of the upper valve body to protrude outward along the circumference so that the plunger can be caught and moved upward together, and formed to protrude outward at the lower end of the upper valve body, so that the plunger is caught and moved upward. It may include a lower hanging part to be moved together.

In addition, the lower moving valve may include a first lower valve body formed in a hollow tubular shape with an upper surface blocked; A second lower valve body formed in a hollow tubular shape with a lower surface blocked and integrally formed above the first lower valve body and having a larger width than the first lower valve body; One or more first lower valve opening holes formed along the circumference on the upper side of the first lower valve body, blocked when moved downward by the cylinder part and opened when moved upward, and the circumference of the second lower valve body It may include a second lower valve opening hole that is formed according to the first lower valve opening hole and allows fuel moved to the lower space to move to the upper space when the first lower valve opening hole is opened.

As described above, the booster for a cryogenic liquid fuel tank according to an embodiment of the present invention forcibly moves the fuel inside the fuel tank to the outside through a magnet slider, vaporizes it by heat exchange action, and injects the fuel back into the gas form, Internal pressure can be increased quickly.

In addition, since it can be implemented with a simple structure, it can be installed in the tank shroud, has excellent installation ease, and can minimize the installation of a separate gas leakage prevention device.

In addition, the deterioration of the insulation performance of the fuel tank can be reduced.

1 is a use example showing a state in which a pressure boosting device for a cryogenic liquid fuel tank according to an embodiment of the present invention is installed in a fuel tank.
Figure 2 is a front view of Figure 1;
FIG. 3 is an exemplary view showing only a pressure boosting device for a cryogenic liquid fuel tank by removing some components of the fuel tank in FIG. 2;
4 is a perspective view illustrating a boosting module of a boosting device for a cryogenic liquid fuel tank according to an embodiment of the present invention;
5 is a cross-sectional view illustrating the boosting module of FIG. 4;
FIG. 6 is an exploded perspective view illustrating the boosting module of FIG. 4 after being separated;
FIG. 7 is an exploded cross-sectional perspective view illustrating the step-up module of FIG. 4 after being separated;
8 (a) and (b) are perspective and cross-sectional views of the cylinder of FIG. 6;
Figure 9 (a) and (b) is a perspective view and cross-sectional view showing the bottom plug of Figure 6.
Figure 10 (a) and (b) is a perspective view and cross-sectional view showing the upper moving valve of Figure 6.
Figure 11 (a) and (b) is a perspective view and cross-sectional view showing the lower moving valve of Figure 6.
12 (a) to (d) are operational examples of operation when a magnet slider of a boosting module of a boosting device for a cryogenic liquid fuel tank according to an embodiment of the present invention is raised.
13(a) to (d) are operational examples of operation when a magnet slider of a boosting module of a boosting device for a cryogenic liquid fuel tank according to an embodiment of the present invention is lowered.

Since the present invention can have various changes and various forms, specific embodiments will be described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Expressions in the singular include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "comprise" or "having" are intended to designate that a combination of features, numbers, steps, components, etc. described in the specification exist, but one or more other features or numbers, It should be understood that the presence or addition of combinations of steps, components, etc. is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Here, repeated descriptions, well-known functions that may unnecessarily obscure the subject matter of the present invention, and detailed descriptions of configurations are omitted. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 13 for explaining an embodiment.

1 is a use example showing a state in which a booster for a cryogenic liquid fuel tank according to an embodiment of the present invention is installed in a fuel tank, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a part of the fuel tank in FIG. It is an exemplary view showing only the booster device for a cryogenic liquid fuel tank by removing the configuration, FIG. 4 is a perspective view showing a booster module of the booster device for a cryogenic liquid fuel tank according to an embodiment of the present invention, and FIG. 6 is an exploded perspective view showing the boosting module of FIG. 4 with the boosting module separated, FIG. 7 is a cross-sectional exploded perspective view showing the boosting module of FIG. (b) is a perspective view and cross-sectional view of the cylinder of FIG. 6, (a) and (b) of FIG. 9 are a perspective view and cross-sectional view of the lower plug of FIG. 6, and (a) and (b) of FIG. is a perspective view and cross-sectional view showing the upper moving valve of FIG. 6, FIG. 11 (a) and (b) are a perspective view and cross-sectional view showing the lower moving valve of FIG. 6, and FIG. 12 (a) to (d) is an exemplary operation diagram showing the operation when the magnet slider of the boosting module of the boosting device for a cryogenic liquid fuel tank according to an embodiment of the present invention is raised, and FIG. 13 (a) to (d) are examples of the present invention This is an exemplary operation diagram showing the operation when the magnet slider of the boosting module of the boosting device for a cryogenic liquid fuel tank according to is lowered.

1 to 3, when the pressure boosting device (1, hereinafter referred to as 'pressure boosting device') for a super fuel liquid fuel tank according to an embodiment of the present invention is installed in a cryogenic liquid fuel tank to lower the internal pressure, the cryogenic temperature It is a device that moves and vaporizes the fuel in the liquid fuel tank and then introduces it back into the tank to increase the internal pressure.

The cryogenic liquid fuel tank uses a method of supplying fuel to the engine by raising the internal pressure by vaporizing the fuel without a pump. However, if the pressure inside the tank after fuel is lower than the engine starting fuel injection pressure, the engine does not start. . At first, the internal pressure is high, so the fuel can easily escape. However, when the engine overload continues, the fuel supply rate decreases remarkably as the internal pressure gradually decreases as the amount of fuel supplied to the engine increases.

In order to solve the above problem, the booster device 1 of the present invention increases the internal pressure by vaporizing the fuel by forcibly moving the fuel when the internal pressure of the cryogenic liquid fuel tank decreases.

On the other hand, the cryogenic liquid fuel tank has two fuel inlet and outlet pipes, a fuel pipe (F) for charging fuel or supplying fuel to the engine, and a gas pipe when the internal pressure rises above a certain pressure due to fuel vaporization. A discharge pipe (E) for discharging fuel to the outside may be configured. In addition, a regulator (R) formed in the middle of the fuel pipe (F) and having a function similar to that of the booster (1) may also be configured. It is a device that automatically moves and vaporizes liquid fuel according to the pressure difference and then sends it to the inside of the fuel tank so that the internal pressure is maintained at a constant pressure.

Specifically, when the boosting device 1 is installed in the cryogenic liquid fuel tank, it is connected to the fuel pipe F so that liquid fuel inside the fuel tank can be introduced from the fuel pipe F and connected to the inside of the fuel tank. This allows gaseous fuel to be injected into the fuel tank.

Referring to FIG. 3 , the booster device 1 may include a first booster pipe 10 , a booster module 20 , a second booster pipe 30 and a front valve 40 .

The first pressure-up transfer pipe 10 is a pipe through which the liquid fuel inside the cryogenic liquid fuel tank can be introduced and moved, and one end is preferably formed to be connected to the fuel pipe F of the cryogenic liquid fuel tank. It may be formed in various ways, such as being formed to be directly connected to the inside of the cryogenic liquid fuel tank,

In addition, the other end of the first booster pipe 10 is connected to the lower end of the booster module 20, that is, the lower plug 211 of the booster module 20, so that the liquid fuel introduced from the inside of the cryogenic liquid fuel tank is boosted by the module ( 20) can be moved.

Meanwhile, the first pressure boosting pipe 10 may be blocked or opened by the front valve 40. When the internal pressure of the cryogenic liquid fuel tank is high, the front valve 40 blocks the pressure boosting device 1 to operate. It may not be, and when the internal pressure is low, the front valve 40 is opened so that the booster 1 can be operated.

The boosting module 20 is connected to the first boosting pipe 10 so that fuel is introduced from the first boosting pipe 10 and moved to the second boosting pipe 30 by vertical movement of the magnet slider. Accordingly, the fuel is vaporized in the second pressure-up-moving pipe 30, and the internal pressure can be increased as the vapor-phase fuel is injected into the fuel tank. That is, the boosting module 20 can function like a pump, and by forcibly moving the fuel inside the fuel tank so that the fuel vaporizes quickly, the internal pressure can be increased in a short time.

4 to 7 , the boosting module 20 may include a cylinder 21, a magnet slider 22, a plunger 23, an upper moving valve 24 and a lower moving valve 25. .

The cylinder part 21 serves as a path through which fuel is moved by connecting the first pressure-up movement pipe 10 and the second pressure-up movement pipe 30 to the lower and upper portions, respectively, and includes a plunger 23 and an upper movement valve 24. ), the lower moving valve 25 may be installed inside and provided with an inner space so as to be movable.

More specifically, the cylinder portion 21 may include a cylinder 210 , a lower plug 211 and an upper plug 212 .

Referring to FIG. 8 , the cylinder 210 may be formed in a tubular shape having a length and having an inner space, and an upper space 210a and a lower space 210b may be formed as the inner space. At this time, since the upper space 210a and the lower space 210b are connected to each other, fuel may be moved.

A plunger 23 and an upper valve 24 may be installed in the upper space 210a, and a lower valve 25 may be installed in the lower space 210b.

In addition, the cylinder 210 may include a space separation protrusion 2100 and a separation prevention protrusion 2101 .

The space separation protrusion 2100 allows the upper space 210a and the lower space 210b to be divided, and protrudes inward along the inner circumference of the cylinder 210 between the upper space 210a and the lower space 210b. can be formed to

The space separation protrusion 2100 may limit the upward movement of the lower movement valve 25 and the lower movement of the upper movement valve 24 . That is, when the lower moving valve 25 is moved upward, it can be caught by the space separation protrusion 2100 and prevented from moving upward any longer, and as the upper moving valve 24 moves downward, the space separation protrusion 2100 When supported by, it is possible to fix the position without moving further to the lower side.

At this time, the space separation protrusion 2100 may be composed of one body formed continuously along the inner circumference of the cylinder 210 to form a ring shape, or may be composed of multiple bodies arranged spaced apart along the circumference.

The anti-separation protrusion 2101 is formed to protrude outward along the outer circumference of the cylinder 210 so that the magnet slider 22 installed on the outer surface of the cylinder 210 is not separated from the cylinder 210 when it is not supported and operated. can do.

The departure prevention protrusion 2101 is preferably formed on the lower side of the cylinder 210, but is not limited thereto.

In addition, an upper plug 212 and a lower plug 211 may be installed at the top and bottom of the cylinder 210, respectively, and may be connected to the first booster pipe 10 and the second booster pipe 30.

The bottom plug 211 is inserted and fixed to the lower part of the cylinder 210, and the first boosting pipe 10 may be connected thereto. In addition, when the lower plug 211 is seated as the lower moving valve 25 moves downward, the lower moving valve 25 may be in a blocked state.

To this end, referring to FIG. 9 , the lower plug 211 may include a lower connector 2110, a lower plug body 2111, and a lower plug insertion portion 2112.

The lower connection pipe 2110 is formed in a through-tube shape, so that the first pressure-up moving pipe 10 can be connected to the lower end, and the lower plug body 2111 can be formed at the upper end.

The lower plug body 2111 is formed on the upper side of the lower connector 2110, is formed to pass through, and has a cross-sectional area greater than or equal to the cross-sectional area of the cylinder 210, so that the lower plug 211 is inserted into the cylinder 210. When it is, it may be located at the bottom of the cylinder 210.

That is, the lower plug body 2111 can limit the degree of insertion of the lower plug 211 and improve airtightness with the cylinder 210.

In addition, the lower plug body 2111 may have an inner hole through which the lower moving valve 25 may be partially inserted. At this time, a size that can be in close contact with the lower moving valve 25 when inserted is preferable, but is not limited thereto.

The lower plug insertion portion 2112 is formed on the upper side of the lower plug body 2111 and can be inserted into the cylinder 210 by being formed to pass through. When inserted into the cylinder 210, it is preferable to be formed in a size that can closely contact the inner surface of the cylinder 210 so as to pack the lower end of the cylinder 210.

In addition, the lower plug insertion part 2112 is in close contact with the lower moving valve 25 as the lower moving valve 25 is seated inside, and blocks the first lower valve opening hole 252 of the lower moving valve 25, The lower moving valve 25 may be in a blocked state.

In addition, only the first lower valve body 250 of the lower moving valve 25 can be inserted into the lower plug insertion part 2112, and the inner surface is placed on the upper side so that the second lower valve body 251 is not inserted and seated on the upper side. It may include a lower valve seating groove formed along.

In addition, the lower plug insertion portion 2112 may further include a packing protrusion formed on an outer surface of the cylinder 210 to increase airtightness.

The upper plug 212 is inserted and fixed to the top of the cylinder 210, and the second boosting pipe 30 may be connected thereto.

The upper plug 212 may be formed in substantially the same shape as the lower plug 211 described above, but is inserted in a different direction, and thus, the lower connector 2110, the lower plug body 2111, and the lower plug insertion portion. An upper connection pipe 2120 corresponding to 2112, an upper plug body 2121, and an upper plug insertion portion 2122 may be included.

The upper connection pipe 2120 may be connected to the second boosting movement pipe 30 .

The upper plug body 2121 may be formed on the lower side of the upper connecting pipe 2120, but a detailed description thereof will be omitted, and the upper moving valve 24 is not inserted.

The upper plug insertion portion 2122 is formed on the lower side of the upper plug body 2121 and can be inserted into the cylinder. Detailed description is omitted, and the upper moving valve 24 is not inserted like the upper plug body 2121, , The upper side of the upper moving valve 24 may be seated in the upper valve seating groove.

Looking back to FIGS. 4 to 7 , the magnet slider 22 is installed outside the cylinder part 21 and can be moved along the length direction of the cylinder part 21, and can be moved up and down.

At this time, the magnet slider 22 may be formed in a ring shape to surround the outer surface of the cylinder portion 21, and may be made of a neodymium magnet having high magnetism, but is not limited thereto.

In addition, the magnet slider 22 may be manually controlled and operated by the user, but is not limited thereto, and a driving device capable of moving in the vertical direction may be applied in various forms.

As the magnetic slider 22 moves up and down, the plunger 23 can be moved up and down together by magnetism, and thus the upper and lower movement valves 24 and 25 are controlled to block and open. You can control the state of

Briefly, when the magnet slider 22 is moved upward, as the plunger 23 moves upward, the upper movement valve 24 is in a blocked state and the fuel in the upper space 210a flows through the plunger 23. It can be pushed up and moved to the first pressure-up moving tube (10). At this time, the lower moving valve 25 is in an open state so that the fuel in the lower space 210b can be moved to the lower side of the upper moving valve 24 in the upper space 210a.

Conversely, when the magnet slider 22 moves downward, as the plunger 23 moves downward, the upper movement valve 24 opens, and the fuel positioned below the upper movement valve 24 moves upward. It can be. At this time, the lower moving valve 25 may be in a blocked state.

The operation by the magnet slider 22 will be described in more detail below.

The plunger 23 is installed in the upper space 210a and can move up and down as the magnet slider 22 moves up and down. To this end, the plunger 23 may be made of an iron material or a neodymium magnet, but is not limited thereto, and any material capable of having magnetic force with the magnet slider 22 may be applied.

In addition, the plunger 23 is preferably formed in a ring shape surrounding the outer surface of the upper moving valve 24, but is not limited thereto.

As the plunger 23 is moved up and down by the magnet slider 22, it can control the up and down movement of the upper movement valve 24 and the blocking/opening state. In addition, the lower movement valve 25 is also moved up and down by pressure under the control of the upper movement valve 24, and the blocking/open state can be controlled.

The upper moving valve 24 is installed to be movable up and down in the upper space 210a, moves up and down according to the movement of the plunger 23, and can be blocked and opened according to the up and down movement. Here, the upper moving valve 24 may be moved upward in a closed state, and may be moved downward in an open state, so that fuel positioned at the lower side may be moved upward.

Referring to FIG. 10 , the upper moving valve 24 may include an upper valve body 240 , an upper valve opening hole 241 , an upper hanging part 242 and a lower hanging part 243 .

The upper valve body 240 is formed in a hollow tubular shape with an upper surface blocked, and may have a longer length than the plunger 23 so that the opening and closing of the upper moving valve 24 can be controlled by the plunger 23. there is.

Accordingly, when fuel flows from the lower space 210b to the upper space 210a, the fuel may flow into the upper valve body 240 as well. Depending on whether the upper valve opening hole 241 formed in the upper valve body 240 is open or blocked, it can be determined whether the fuel introduced into the upper valve body 240 will move to the outside of the upper valve body 240. .

One or more upper valve opening holes 241 are formed along the circumference of the upper side of the upper valve body 240, and may be blocked when moved upward by the plunger 23 and opened when moved downward.

At this time, it is preferable that the upper valve opening hole 241 is spaced apart at a predetermined interval along the circumference and formed in plurality, but is not limited thereto.

The upper hanging part 242 may be formed on the top of the upper valve body 240 to protrude outward along the circumference. Accordingly, while the plunger 23 moves upward, it is caught by the upper hanging part 242 and the upper moving valve 24 can be moved together.

The lower hanging part 243 may be formed to protrude outward from the lower end of the upper valve body 240 . At this time, the lower hanging portion 243 may be formed as a member that is detachable to the upper valve body 240, but is not limited thereto, and may be integrally formed with the upper valve body 240.

Accordingly, when the plunger 23 moves downward, the plunger 23 is caught on the lower hanging part 243 and the upper moving valve 24 can be moved together.

The lower movement valve 25 is installed to be movable up and down in the lower space 210b and can be moved up and down by pressure generated by the movement of the upper movement valve 24 according to the movement of the plunger 23. It can be opened and blocked according to movement. That is, the movement and state of the lower movement valve 25 can be controlled together according to the state (open or blocked) and movement (upward movement or lower movement) of the upper movement valve 24 .

11, the lower moving valve 25 includes a first lower valve body 250, a second lower valve body 251, a first lower valve opening hole 252 and a second lower valve opening hole 253 can include

The first lower valve body 250 may be hollow and formed in a tubular shape with an upper surface blocked.

The second lower valve body 251 is hollow and formed in a tubular shape in which the lower surface is blocked, and may be formed integrally with the upper side of the first lower valve body 250. However, the second lower valve body 251 is formed to have a larger cross-sectional area than the first lower valve body 250, so that it is not inserted into the lower plug 211 like the first lower valve body 250.

Accordingly, the second lower valve body 251 is seated in the lower valve seating groove and may not be inserted into the lower plug 211, and the second lower valve opening hole 253 through the first lower valve opening hole 252 It can be completely blocked so that the fuel does not move.

One or more first lower valve opening holes 252 may be formed along the circumference of the upper side of the first lower valve body 250, and it is preferable to form a plurality of them, but is not limited thereto.

The first lower valve opening hole 252 is formed when the lower moving valve 25 is moved downward and inserted into the lower plug 211 of the cylinder part 21, the lower plug 211 and the first lower valve body ( 250) may be blocked as it is in close contact.

In addition, as the lower moving valve 25 moves upward, the lower moving valve 25 is separated from the lower plug 211 and the first lower valve opening hole 252 can be opened, and thus the first boosting moving pipe ( Fuel introduced from 10) may be moved to the upper space 210a via the lower space 210b through the first lower valve opening hole 252 and the second lower valve opening hole 253.

One or more second lower valve opening holes 253 may be formed along the circumference of the second lower valve body 251, and it is preferable to form a plurality of them, but is not limited thereto.

The second lower valve opening hole 253 allows fuel moving to the lower space 210b to move to the upper space 210a when the first lower valve opening hole 252 is opened.

The operation of the boosting module 20 configured as described above will be described in more detail with reference to FIGS. 12 and 13 .

First, referring to FIG. 12, in the initial state (FIG. 12(a)) in which the upper shifting valve 24 and the lower shifting valve 25 are positioned at the lowest end in the upper space 210a and the lower space 210b, respectively. When the magnet slider 22 is moved upward, the plunger 23 moves upward and closes the upper valve opening hole 241 of the upper valve 24, so that the upper valve 24 may be blocked. there is. At this time, since the first lower valve opening hole 252 of the lower movement valve 25 is blocked by the cylinder part 21, the lower movement valve 25 may be in a blocked state (Fig. 12(b)).

Then, as the magnet slider 22 continues to rise, the plunger 23 moves the top shift valve 24 in the blocked state upward, and the plunger 23 and the top shift valve 24 move upward in the upper space 210a. The fuel located in is moved to the second booster pipe 30, and at this time, as the lower shift valve 25 is moved upward by the pressure and becomes open, the fuel introduced from the first booster pipe 10 is transferred to the first booster pipe 10. It can be moved to the upper space 210a through the lower valve opening hole 252, the lower space 210b, and the second lower valve opening hole 253 (FIG. 12(c)).

Then, as the magnet slider 22 rises to the top, the upper moving valve 24 moves to the upper end of the upper space 210a and is seated on the upper plug 212 to remove the fuel located at the upper side of the upper space 210a. All can be pushed out, and fuel can enter the inside of the upper shift valve 24 (Fig. 12 (d)).

On the other hand, referring to FIG. 13, when the magnet slider 22 is moved downward in the initial state (FIG. 13(a)), which is the state of FIG. 12(d) in which the upward movement is completed, the plunger 23 As it moves downward, the upper valve opening hole 241 of the upper shift valve 24 can be opened so that the upper shift valve 24 is open (Fig. 13(b)).

In the above state, as the magnet slider 22 continues to descend, the fuel located inside the upper valve 24 can move upward through the upper valve opening hole 241, and at this time, the lower valve 25 moves by the pressure. ) may be moved downward to become a blocking state ((c) of FIG. 13).

Thereafter, as the magnet slider 22 descends to the lowest end, the fuel located at the lower side of the upper space 210a may be moved upward (Fig. 13(d)).

The booster module 20 can move the fuel to the second booster pipe 30 connected to the upper side through the above operation so that the fuel can be vaporized through the second booster pipe 30 .

The second boosting pipe 30 has one end and the other end connected to the booster module 20 and the cryogenic liquid fuel tank, respectively, and the fuel introduced from the booster module 20 is moved and vaporized into the cryogenic liquid fuel tank. can be allowed to flow in.

Here, the second boosting transfer pipe 30 may be composed of a copper pipe having a high heat transfer rate so that the fuel being moved may be vaporized, but is not limited thereto.

The front valve 40 is installed in the first booster pipe 10 and opens or closes it according to the internal pressure of the cryogenic liquid fuel tank, thereby opening or blocking the first booster pipe 10. This front valve 40 may be manually controlled by a user, but is not limited thereto, and may be automatically controlled according to a reference pressure by an internal pressure.

Accordingly, when the internal pressure of the cryogenic liquid fuel tank is lowered and the operation of the booster 1 is required, the front valve 40 can be opened, and when the internal pressure rises to a certain level, the front valve 40 is blocked and the booster (1) can be stopped.

As described above, the pressure boosting device for a cryogenic liquid fuel tank according to an embodiment of the present invention forcibly moves the fuel inside the fuel tank to the outside through a magnet slider to vaporize the fuel through a heat exchange action, and returns the fuel to the inside in the form of a gas. By injecting, the internal pressure can be raised quickly.

In addition, since it can be implemented with a simple structure, it can be installed in the tank shroud, has excellent installation ease, and can minimize the installation of a separate gas leakage prevention device.

In addition, the deterioration of the insulation performance of the fuel tank can be reduced.

In the above, specific parts of the content of the present invention have been described in detail, and for those skilled in the art, these specific descriptions are only preferred embodiments, and the scope of the present invention is not limited thereby. It will be clear. Accordingly, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

1: booster
10: 1st boosting tube
20: boost module
21: cylinder part
210: cylinder
210a: upper space
210b: lower space
2100: space separation protrusion
2101: departure prevention protrusion
211: lower plug
2110: bottom connector
2111: lower plug body
2112: lower plug insertion part
212: top plug
2120: top connector
2121: upper plug body
2122: top plug insert
22: magnet slider
23: plunger
24: upper moving valve
240: upper valve body
241: upper valve opening hole
242: upper hanging part
243: lower hanging part
25: lower moving valve
250: first lower valve body
251: second lower valve body
252: first lower valve opening hole
253: second lower valve opening hole
30: second boosting tube
40: shear valve

Claims (9)

A pressure boosting device installed in a cryogenic liquid fuel tank to increase the internal pressure by moving and vaporizing fuel in the cryogenic liquid fuel tank and then introducing the fuel into the cryogenic liquid fuel tank when the internal pressure is low,
a first pressure transfer pipe through which the fuel in the cryogenic liquid fuel tank is introduced and moved;
A boosting module connected to the first boosting pipe, through which fuel flows in, and moving the fuel by movement of a magnet slider to vaporize the fuel; and
and a second boosting transfer pipe connected to the boosting module and the cryogenic liquid fuel tank, and allowing the fuel introduced from the boosting module to be moved, vaporized, and introduced into the cryogenic liquid fuel tank.
According to claim 1,
The booster device further comprises a front end valve installed in the first pressure booster tube and opened or closed according to the internal pressure of the cryogenic liquid fuel tank.
According to claim 1,
The step-up module,
It is formed in the shape of a perforated tube having a length, and an upper space located at the top as an internal space and a lower space connected to the upper space and located at the bottom are formed, and the first boosting tube and the second boosting tube are formed at the bottom and top, respectively. A cylinder part to which the moving pipe is connected;
a magnet slider installed outside the cylinder and moving up and down along the cylinder;
a plunger installed in the upper space and moved up and down according to the movement of the magnet slider;
An upper movement valve installed in the upper space, moved up and down according to the movement of the plunger, and blocked and opened according to the movement up and down; and
and a lower movement valve installed in the lower space, moved up and down according to the movement of the plunger, and opened and closed according to the movement of the plunger.
According to claim 3,
The step-up module,
When the magnet slider is moved upward, the upper movement valve is blocked as the plunger is moved upward, so that the fuel in the upper space is moved to the first pressure-up movement pipe, and the lower movement valve is opened to the lower space. The fuel of is moved to the lower side of the upper moving valve in the upper space,
When the magnet slider is moved to the lower side, as the plunger is moved to the lower side, the upper movable valve is opened to move the fuel located below the upper movable valve to the upper side, and the lower movable valve is blocked. boosting device.
According to claim 3,
The cylinder part,
A cylinder formed in a tubular shape having a length and having the upper space and the lower space formed therein;
A lower plug inserted and fixed to the bottom of the cylinder, connected to the first pressure-up moving pipe, and blocking the lower moving valve when the lower moving valve is seated; and
and a top plug inserted and fixed to an upper part of the cylinder, to which the second booster tube is connected.
According to claim 5,
the cylinder,
A space separation protrusion formed between the upper space and the lower space to protrude inward along the inner circumference to limit the upward movement of the lower movement valve and to limit the lower movement of the upper movement valve; and
A boosting device comprising a separation prevention protrusion formed to protrude outward along an outer circumference to support the magnet slider and prevent separation.
According to claim 5,
The lower plug,
a lower connecting pipe to which the first boosting pipe is connected;
A lower plug body formed on the upper side of the lower connector pipe and
and a lower plug insertion portion formed on the upper side of the lower plug body, inserted into the cylinder, and in close contact with the lower shift valve to block the lower shift valve.
According to claim 3,
The upper moving valve,
An upper valve body formed in a hollow tube shape with an upper surface blocked and having a longer length than the plunger;
one or more upper valve opening holes formed along the circumference of the upper side of the upper valve body, blocked when moved upward by the plunger and opened when moved downward;
An upper hanging part formed on the upper end of the upper valve body to protrude outward along the circumference so that the plunger can be caught and moved upward together; and
and a lower locking portion formed at a lower end of the upper valve body to protrude outward and allowing the plunger to be caught and moved downward together.
According to claim 3,
The lower moving valve,
A first lower valve body that is hollow and formed in a tubular shape with an upper surface blocked;
A second lower valve body formed in a hollow tubular shape with a lower surface blocked and integrally formed above the first lower valve body and having a larger width than the first lower valve body;
One or more first lower valve opening holes formed along the circumference on the upper side of the first lower valve body, blocked when moved downward by the cylinder part and opened when moved upward; and
A pressure boosting device including a second lower valve opening hole formed along the circumference of the second lower valve body and allowing fuel moved to the lower space to be moved to the upper space when the first lower valve opening hole is opened. .

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