KR102555024B1 - Outlet device for storage tank and storage tank having the same - Google Patents

Abstract

A discharge device for a cryogenic storage tank and a cryogenic storage tank including the same, wherein the discharge device discharges the cryogenic material from a chamber in which the cryogenic material is stored to the outside, and includes a pumping cylinder, an extension rod, a valve part, and a discharge passage . The pumping cylinder is positioned through the chamber portion. The extension rod extends inside the pumping cylinder. The valve unit discharges the cryogenic material to the outside according to the operation of the extension rod. The discharge passage extends from the inside of the pumping cylinder from the valve part to the outside, and the cryogenic material moves.

Description

Discharge device for cryogenic storage tank and cryogenic storage tank including the same {OUTLET DEVICE FOR STORAGE TANK AND STORAGE TANK HAVING THE SAME}

The present invention relates to a discharge device for a cryogenic storage tank and a cryogenic storage tank including the same, and more particularly, when a material in a cryogenic state such as liquid hydrogen stored therein is discharged to the outside, heat transfer during the discharge process is minimized. It relates to a discharge device for a cryogenic storage tank capable of effectively maintaining a cryogenic state by doing so, and a cryogenic storage tank including the same.

Recently, cryogenic storage tanks for effectively storing or storing cryogenic substances such as liquid hydrogen have been developed in various ways as the demand for the cryogenic substances increases.

In the case of such a cryogenic storage tank, insulation from the outside is most important in order to effectively store the material in a cryogenic state. Even if the stored storage chamber is effectively insulated, heat exchange may occur during the discharge process of the cryogenic material.

That is, when the cryogenic material is discharged to the outside, the temperature of the discharged cryogenic material is relatively increased. If the discharge passage through which the cryogenic material passes is designed to pass through the storage chamber, the temperature in the stored state is relatively increased. There is a problem in that the thermal insulation effect of the stored cryogenic material decreases due to heat exchange occurring as it directly contacts the low-temperature material.

That is, as in Japanese Patent Registration No. 3109932, when the refrigerant pipe structure is designed to penetrate the storage space, the relatively high temperature refrigerant passing through the pipe is separated from the relatively low temperature refrigerant stored in the storage space. Heat exchange occurs between them, causing a problem in that the temperature of the refrigerant stored in the storage space rises.

Accordingly, insulation of the cryogenic material at a relatively low temperature stored in the storage space is deteriorated, and various problems such as the generation of bubbles due to the temperature increase may be caused.

Japanese Patent Registration No. 3109932

Therefore, the technical problem of the present invention is focused on this point, and the object of the present invention is to minimize heat transfer during the discharge process when discharging a cryogenic substance such as liquid hydrogen stored inside to the outside, effectively reducing the cryogenic state. It is to provide a discharge device for a cryogenic storage tank that can be maintained.

In addition, another object of the present invention relates to a cryogenic storage tank including the discharge device.

A discharge device according to an embodiment for realizing the above object of the present invention discharges the cryogenic material from a chamber in which the cryogenic material is stored to the outside, and includes a pumping cylinder, an extension rod, a valve part, and a discharge passage. The pumping cylinder is positioned through the chamber portion. The extension rod extends inside the pumping cylinder. The valve unit discharges the cryogenic material to the outside according to the operation of the extension rod. The discharge passage extends from the inside of the pumping cylinder from the valve part to the outside, and the cryogenic material moves.

In one embodiment, the pumping cylinder may insulate between the cryogenic material stored in the chamber unit and the cryogenic material moving along the discharge passage.

In one embodiment, a heat insulating part may be formed along an outer surface of the discharge passage.

In one embodiment, the valve unit may include a discharge rod connected to the extension rod and reciprocating in one direction, a first inner frame forming an upper space in which the cryogenic material is introduced from the chamber unit and primarily stored, and A second inner frame forming a lower space in which the cryogenic material flowing from the upper space along the discharge rod according to the movement of the discharge rod is stored before being discharged.

In one embodiment, the pumping cylinder is formed integrally with the first inner frame and integrally formed with a first valve frame through which the discharge passage passes, and the second inner frame integrally formed with the discharge passage to the inside. It may include a second valve frame passing through.

In one embodiment, the pumping cylinder may further include a lower frame formed below the second valve frame, and the discharge passage may include a first line portion passing through the lower frame and changing direction. .

In one embodiment, the first valve frame, the second valve frame, and the lower frame are separably connected, and as the first valve frame, the second valve frame, and the lower frame are connected, the discharge passage are open to each other and can be extended.

In one embodiment, the valve unit is formed to pass through the first inner frame, extends from an inlet through which the cryogenic material flows into the upper space, and a side surface of the discharge rod, and a check valve is formed therein to An extension part for moving the cryogenic material introduced into the upper space into the discharge rod, and an extension formed at an end of the discharge rod, in close contact with the second inner frame, and transporting the cryogenic material stored in the lower space to the discharge passage. It may further include a contact portion for discharging to.

In one embodiment, the discharge passage may be formed to pass through the discharge rod and extend along the extension rod.

In one embodiment, the cryogenic material stored in the upper space is moved to and stored in the lower space along an extension line extending along the discharge rod, and is then stored outside along the discharge passage extending parallel to the extension line. can be ejected with

In one embodiment, it further includes a driving unit for reciprocating the extension rod, wherein the driving unit includes at least one driving unit generating a driving force, a worm gear unit connected to the driving unit, and a worm wheel connected to the worm gear unit and rotating and a drive transmission unit that rotates eccentrically with respect to the worm wheel unit to convert rotational driving force of the worm wheel unit into linear driving force of the extension rod.

In one embodiment, the worm gear unit includes a worm rod to which the driving unit is connected to at least one of both ends and a worm gear is formed in the center, and the diameter of the worm rod decreases from both ends toward the center. .

A cryogenic storage tank according to an embodiment for realizing the object of the present invention described above includes the discharge device, the chamber unit, a central frame, a fixed frame, an upper fixed frame, and a cover frame. The chamber part is positioned along the center of which the discharge device penetrates. The central frame is fixed to the outside of the chamber part. The fixing frame fixes the chamber part and the central frame. The upper fixing frame is exposed to the upper part of the chamber and fixes the extending discharge device to the central frame. The cover frame covers the outside of the upper fixed frame.

According to the embodiments of the present invention, since the discharge passage for discharging the cryogenic material to the outside extends along the inside of the pumping cylinder, the discharge passage does not directly contact the cryogenic material stored in the chamber and effectively insulates the cryogenic material. Therefore, it is possible to block the discharged cryogenic material whose temperature has risen during the discharge process from transferring heat to the cryogenic material stored in the chamber unit, thereby preventing the temperature rise of the cryogenic material stored in the chamber unit in advance.

That is, since the discharge passage passing through the pumping cylinder is insulated by the pumping cylinder, the rise in temperature of the cryogenic material stored in the chamber is blocked, and further, when the outside of the discharge passage is covered with an additional insulation, this insulation effect can be further improved. there is.

In particular, the pumping cylinder includes a first valve frame, a second valve frame, and a lower frame that are detachably coupled to each other, and discharge passages are formed in each frame, and as the respective frames are coupled to each other, the discharge passages are mutually connected to each other. Since it is open and extends to the outside, it is possible to easily form an extended discharge passage only by coupling the respective frames of the pumping cylinder to each other without forming a separate discharge passage on the inside of the pumping cylinder.

This has the advantage of easy assembly and separation of the pumping cylinder, and can improve the convenience of repairing the pumping cylinder.

In this case, the discharge passage formed in the lower frame of the pumping cylinder is extended to change direction, and in the frame constituting the other pumping cylinders, if a discharge passage extending in a straight line is formed without considering the direction change of the discharge passage Since it is sufficient, the ease of manufacture of the pumping cylinder as a whole is improved.

Unlike this, since the discharge oil is formed to pass through the discharge rod, a separate opening line may not be formed on the pumping cylinder, thereby preventing the problem of increasing the volume of the pumping cylinder, and furthermore, the discharge line By minimizing the length of , simpler design and operation can be implemented.

In addition, in the drive unit for reciprocating the extension rod, by applying a worm gear unit, a worm wheel unit, and a drive transmission unit that convert rotational drive into linear drive, a speed reducer for reducing the speed of a conventional motor is applied to have a complicated structure The driving unit can be manufactured to enable relatively simple and accurate driving.

In particular, since the central diameter of the worm rod constituting the worm gear part is smaller than the diameter of both ends, the driving stability can be improved when a pair of driving parts are applied, and it has high durability with low noise and provides driving force can do.

1 is a cross-sectional view showing a cryogenic storage tank according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing an example of a cross section of a discharge passage in the discharge device of FIG. 1 .
3A and 3B are cross-sectional views illustrating an operation of a valve unit in the discharge device of FIG. 1 .
4 is a cross-sectional view showing a cryogenic storage tank according to another embodiment of the present invention.
5A and 5B are cross-sectional views illustrating an operation of a valve unit in the discharge device of FIG. 4 .
FIG. 6 is an enlarged internal view of a driving unit in the cryogenic storage tank of FIG. 1 or 4 .

Since the present invention can be applied with various changes and can have various forms, 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. Like reference numerals have been used for like elements throughout the description of each figure. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms.

These terms are only used for the purpose of distinguishing one component from another. Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, the terms "comprise" or "consisting of" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

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

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail.

1 is a cross-sectional view showing a cryogenic storage tank according to an embodiment of the present invention.

1, the cryogenic storage tank 1 according to this embodiment includes a central frame 10, a cover frame 20, a support frame 30, a chamber frame 40, an upper fixed frame 60, It includes the chamber part 100 and the discharge device 200.

The central frame 10 forms the central part of the cryogenic storage tank 1 as a whole, and the chamber part 100 is located inside the central frame 10 .

The cover frame 20 is connected to the upper portion of the central frame 10, and the upper exposed portion of the upper fixed frame 60 and the discharge device 200 is outside of the upper fixed frame 60 to be described later. covers

The support frame 30 is connected to the lower part of the central frame 10 and serves to fix the central frame 10 to the ground or the like.

The chamber frame 40 is a frame extending from an upper portion of the chamber unit 100, and the discharge device 200 is located and fixed on the inside and the cover frame 20 is located and fixed on the outside. The interior of the central frame 10 and the space between the chamber part 100 and the chamber frame 40 are maintained in a vacuum state as shown.

As described above, the chamber part 100 and the chamber frame 40 extending upward therefrom are fixed by the cover frame 20, through which the chamber part 100 is connected to the center frame 10 It is located in a stable fixed state inside the.

The discharge device 200 extends from the upper part of the chamber part 100, that is, the chamber frame 40, to the internal storage space of the chamber part 100, that is, to the storage space 110 in which the cryogenic material is stored. , The portion of the discharge device 200 exposed to the upper portion of the chamber part 100 is fixed by the upper fixing frame 60 as described above.

That is, the discharge device 200 extends to the inner space of the chamber unit 100 located at the lower side while being fixed to the upper fixing frame 60 .

Thus, as will be described later, the discharge device 200 discharges the cryogenic material stored in the chamber unit 100 to the outside. In this case, as shown in FIG. 1 inside the chamber unit 100, a cryogenic material such as liquid hydrogen (LH ₂ ) is stored at a predetermined height.

On the other hand, as described above, the cover frame 20 is connected to the upper part of the central frame 10 while positioning and fixing the upper fixing frame 60 to which the discharge device 200 is fixed therein.

In this case, as shown, the extension rod 220 of the discharge device 200, which will be described later, extends upward and penetrates the cover frame 20 and the upper fixing frame 60 to be additionally connected in the upper direction. Although not shown, the extension rod 220 is connected to a driving unit 400 (see FIG. 6) additionally provided outside the cover frame 20 to receive driving force.

In addition, when the extension rod 220 is connected through the cover frame 20, as described above, the extension rod 220 is fixed through the upper fixing frame 60.

The discharge device 200 will be described in more detail as follows.

That is, referring to FIG. 1 again, the discharge device 200 extends into the inside of the chamber 100 forming a predetermined storage space 110, as described above, and the pumping cylinder 210 ), an extension rod 220, a valve unit 300, a lower valve 240 and a discharge passage 250.

Furthermore, the ejection device 200 further includes a driving unit 400, which will be described later with reference to FIG. 6.

The pumping cylinder 210 includes a first valve frame 212 , a second valve frame 213 and a lower frame 214 .

The upper side of the first valve frame 212 is exposed to the upper part of the chamber part 100 and is fixed by the upper fixing frame 60, and the lower part is inserted into the chamber part 100 and positioned.

In this case, the extension length of the first valve frame 212 may be designed in various ways considering the depth of the chamber part 100 and the like.

The first valve frame 212 is formed through an opening through which the extension rod 220 can extend, and the discharge passage 250 to be described later is also formed adjacent to the extension rod 220 through the center of the first valve frame 212 . It can be.

In this case, the opening through which the extension rod 220 and the discharge passage 250 pass in the first valve frame 212 may be formed integrally with the manufacture of the first valve frame 212, and thus Accordingly, the first valve frame 212 does not include a separate assembly structure and may be formed as a single body.

On the other hand, as shown, the first valve frame 212 has a relatively large radius and may have a cylindrical shape as a whole.

In the case of the first valve frame 212, the discharge passage 250 passes through the inside, and in the case of the cryogenic material penetrating the discharge passage 250, since the temperature is relatively high, heat transfer with the outside is minimized. need something

Accordingly, in the case of the first valve frame 212, the radius is formed to be relatively large to effectively block heat. In this case, the radius of the first valve frame 212 is the radius of the first valve frame. It can be variously selected in consideration of the degree to which thermal insulation can be performed in consideration of the constituting material or the temperature of the cryogenic material flowing along the discharge passage 250 .

The second valve frame 213 is a frame coupled to the lower surface of the first valve frame 212, and has a cylindrical shape having the same radius as the first valve frame 212 as a whole, and the first valve frame 213 as a whole. It may be formed with a smaller length than the extended length of the frame 212 .

That is, as confirmed through FIG. 1 and FIG. 3A to be described later, the extended length of the second valve frame 213 is substantially equal to the length occupied by the lower space 315 (see FIG. 3A) in the valve unit 300. They can be made of the same length.

At this time, since the lengths of the upper space 314 and the lower space 315 may be varied in consideration of the length of the valve unit 300, which will be described later, and the like, the first and second valve frames accordingly. It is obvious that the lengths of the s (212, 213) can also be designed in various ways.

In addition, in the case of the second valve frame 213, an inlet portion 313 (FIG. 3A) to be described later is formed between the first valve frame 212 and the second valve frame 213. In this case, since the inlet 313 may be formed in an inclined direction as shown, the upper surface of the second valve frame 213 may form an inclined surface.

Alternatively, the inlet part 313 may be formed in a parallel direction without an inclination. In this case, the upper surface of the second valve frame 213 may form a flat surface.

The second valve frame 213 may include a space opened to form the lower space 315 at a center thereof, and the discharge passage 250 may be formed adjacent to the lower space 315 through which the discharge passage 250 penetrates.

In this case, the discharge passage 250 is formed to extend in line with the discharge passage formed in the first valve frame 213, as will be described later.

Also, like the upper frame 211, the second valve frame 213 also has an opening through which the lower space 315 and the discharge passage 250 are formed or passed through. It may be integrally formed during manufacturing, and thus, the second valve frame 213 may be formed as a single body without a separate assembly structure.

The discharge passage 250 passes through the inside of the second valve frame 213, and the cryogenic material passing through the discharge passage 250 is stored outside, that is, in the storage space 110 of the chamber unit 100. Since insulation with the stored cryogenic material must be performed, the second valve frame 213 must also be formed of a material that is similar to or identical to that of the upper frame 211 and the first valve frame 212 and can be insulated.

Furthermore, in the case of the second valve frame 213, in a state in which it is integrally formed, it is coupled to the first valve frame 212 on the upper side and coupled to the lower frame 214 on the lower side. In this case, it has been described that various coupling units can be used.

The lower frame 214 is a frame coupled to the lower surface of the second valve frame 213, and must also include a structure for sealing the lower portion of the valve unit 300, so that the overall radius of the lower portion is narrowed. can have Alternatively, the lower frame 214 may have a single block structure without a radius change.

Since the lower frame 214 extends to change the direction of the discharge passage 250, the length or radius of the lower frame 214 should be designed in consideration of the change in the direction of the discharge passage 250. .

The lower frame 214 forms a space in the inner center where the lower valve 240 located at the lower end of the valve unit 300 can be located, and from the space where the lower valve 240 is located, in a downward direction, A penetrating portion that can be extended to change the direction of the discharge passage 250 to the side and to the top should be formed.

In this case, the discharge passage 250 whose direction has been changed upward is formed to extend in line with the discharge passage 250 of the second valve frame 213 .

In addition, as described above with respect to the other frames 212 and 213, the lower frame 214 also has a space where the lower valve 240 is located or an opening through which the discharge passage 250 passes. It can be formed integrally with the manufacture of 214, and accordingly, the lower frame 214 also does not include a separate assembly structure and can be formed as a single body.

In addition, the lower frame 214 must also be formed of a material capable of insulating for performing the aforementioned insulation, and the lower frame 214 is coupled upwardly with the second valve frame 213 through various coupling units. It can be.

On the other hand, the first and second valve frames 212 and 213 and the lower frame 214 have been shown and described as being separated from each other for convenience of explanation, and each may be independently manufactured and coupled to each other, but this Alternatively, it may be integrally formed as one frame.

The extension rod 220 extends and is located along the central opening of the first valve frame 212, and although not shown, is driven by a driving unit 400 to be described later, and is driven in a vertical direction, that is, the extension rod 220 ) is reciprocally driven along the extension direction of

In this case, in order for the extension rod 220 to reciprocate along the first valve frame 212, although not shown in detail, a separate sliding guide 211 is provided on the central opening of the first valve frame 212. may be provided.

Alternatively, the opening may be formed to minimize friction so that the extension rod 220 can move freely along the opening.

The valve part 300 is connected to the lower part of the extension rod 200, and according to the reciprocating movement of the extension rod 200, the cryogenic material stored in the storage space 110 is transferred to the discharge passage 250. leaked out through

The detailed configuration and operation of the valve unit 300 will be described with reference to FIGS. 3A and 3B to be described later.

The lower valve 240 is connected to the lower part of the valve part 300 and is located on a predetermined space formed on the lower frame 214 .

The lower valve 240 connects between the outlet 316 of the valve unit 300 (see FIG. 3A) and the discharge passage 250, and the outlet 316 and the discharge passage 250 In the case of direct connection, it is provided to prevent water leakage from the connection part.

That is, the lower valve 240 forms a predetermined storage space therein, so that the leaked cryogenic material in the process of providing the cryogenic material flowing out through the outlet 316 to the discharge passage 250 is temporarily stored. Furthermore, by performing an opening/closing function of the discharge passage 250, it is possible to block unnecessary supply of the cryogenic material to the discharge passage 250.

The discharge passage 250 is connected to the outlet 316 through the lower valve 240 and discharges the cryogenic material flowing out through the outlet 316 to the outside.

Specifically, the discharge passage 250 includes first to third discharge passages 251 , 252 , and 253 .

The first discharge passage 251 is integrally manufactured together with the manufacture of the lower frame 214 and is formed to pass through the lower frame 214, and as shown, the lower part at a certain distance from the lower valve 240. After extending in the direction, the movement direction is converted to the horizontal direction and extended, and the direction is converted to the upper direction again to extend. In this case, when extending in the upper direction, it may extend in an inclined direction as shown in consideration of the shape of the lower frame 214 .

That is, the first discharge passage 251 is a discharge passage that changes the direction of the cryogenic material flowing downward through the outlet 316 and discharges it upward, and as shown, the direction is vertical. As it is switched, the discharge direction is changed.

In the case of the first discharge passage 251, it is manufactured simultaneously with the manufacture of the lower frame 214, and since it is integrally formed through a mold or the like, it is relatively easy to manufacture the first discharge passage 251 so that the direction is converted to a vertical direction. can However, the direction change of the first discharge passage 251 is not necessarily limited to vertical.

The second discharge passage 252 is manufactured integrally with the manufacture of the second valve frame 213 and is formed to pass through the second valve frame 213, and as shown, the lower end of the first It is connected to the discharge passage 251 and extends in a straight line upward.

Thus, the cryogenic material discharged through the first discharge passage 251 is additionally discharged upward along the second discharge passage 252 .

The third discharge passage 253 is manufactured integrally with the manufacture of the first valve frame 212 and is formed to pass through the first valve frame 212, and as shown, the lower end of the second discharge passage 253 It is connected to the discharge passage 252 and extends in a straight line upward.

Thus, the cryogenic material discharged through the second discharge passage 252 is additionally discharged upward along the third discharge passage 253 . In this case, the cryogenic material discharged upward through the third discharge passage 253 is opened and closed by a separate discharge cap (not shown) formed on the upper surface of the first valve frame 212. .

That is, when the cryogenic material is discharged to the outside through the third discharge passage 253, the discharge cap is opened, and a separate discharge chamber is connected to discharge the cryogenic material, and the discharge is completed. Then, the discharge cap is closed to seal the third discharge passage 253 from the outside.

As described above, the first to third discharge passages 251, 252, and 253 are formed in lines opened together with the formation of the frames on the respective frames 214, 213, and 212 of the pumping cylinder. In addition, since the frames are formed to have a predetermined thickness, heat transfer with the outside is blocked and an adiabatic state is maintained.

However, additional insulation needs to be performed on the cryogenic material passing through the first to third discharge channels 251, 252, and 253. Accordingly, an insulator 255 as shown in FIG. 3 may be additionally formed.

FIG. 2 is a cross-sectional view showing an example of a cross section of a discharge passage in the discharge device of FIG. 1 .

That is, referring to FIG. 2, along the outer circumferential surfaces of the first to third discharge passages 251, 252, and 253 formed on the respective frames 214, 213, and 212 of the pumping cylinder, the thermal insulation A portion 255 may be further formed.

In this case, when the first to third discharge passages 251, 252, and 253 are extended, the heat insulating part 255 may be formed along outer circumferential surfaces of the extended lines, and may be formed of a heat insulating material. there is.

In addition, in the case of the heat insulating part 255, for example, in manufacturing the pumping cylinders, it may be formed together with the first to third discharge passages 251, 252, and 253 through a process such as insert molding. can However, it is not limited to these manufacturing processes.

3A and 3B are cross-sectional views illustrating an operation of a valve unit in the discharge device of FIG. 1 .

Referring to FIGS. 3A and 3B , the valve part 300 includes an inner frame 310 , a discharge rod 320 , an extension part 330 and a contact part 340 .

Although the inner frame 310 is shown as a separate frame in FIGS. 3A and 3B, it may substantially correspond to the pumping cylinder 210 described above.

That is, the inner frame 310 includes a first inner frame 311 forming an upper space 314 and a second inner frame 312 forming a lower space 315. The inner frames 311 and 312 may be formed as separate frames, but as shown in the drawing, the first inner frame 311 is a part of the first valve frame 212, and the second The inner frame 312 may correspond to a part of the second valve frame 213 .

However, in the following, for convenience of description, the first and second inner frames 311 and 312 are described as separate components, but the first and second inner frames 311 and 312 are ultimately the first and second inner frames 311 and 312. And it is sufficient to understand that it is integrally formed with the second valve frames 212 and 213 .

As described above, the first inner frame 311 forms the upper space 314, the second inner frame 312 forms the lower space 315, and the upper space 314 and the The lower space 315 is formed continuously without being separated.

In this case, the first inner frame 311 has an opening through which the extension rod 220 passes, and an inlet 313 is formed at the lower end of the first inner frame 311. .

The inlet 313 is connected to the storage space 110, and the cryogenic material is introduced from the storage space 110, and the cryogenic material thus introduced is located on the upper space 314.

The second inner frame 312 has the outflow part 316 formed at the lower end, and as will be described later, after the cryogenic material stored in the upper space 314 is moved to the lower space 315, The cryogenic material stored in the lower space 315 is discharged to the outlet 316 by the moving operation of the discharge rod 320 .

The upper side of the discharge rod 320 is connected to the extension rod 220 and extends vertically in the upper space 314 and the lower space 315 .

The discharge rod 320 moves in the vertical direction according to the vertical movement of the extension rod 220, and through this, the cryogenic material is moved from the upper space 314 to the lower space 315, It flows out through the outlet part 316.

An extension line 321 extending along the center of the discharge rod 320 is formed in the discharge rod 320, and an upper end of the extension line 321 is perpendicular to the extension direction of the extension line 321. An inlet line 322 extending in the in direction is formed.

Thus, the cryogenic material stored in the upper space 314 is introduced into the discharge rod 320 through the inlet line 322, and then flows along the extension line 321 to form the lower space ( 315) is provided.

In this case, a second check valve 341 is provided at the end of the extension line 321, and the cryogenic material is flowed in only one direction by the second check valve 341.

That is, the cryogenic material provided from the upper part along the extension line 321 by the second check valve 341 is provided to the lower space 315, but the cryogenic material stored in the lower space 315 Inflow into the extension line 321 is blocked.

The extension part 330 is formed by extending a predetermined length from the top of the discharge rod 320 in a direction perpendicular to the extension direction of the discharge rod 320 .

In this case, the outer circumferential surface of the extension part 330 is formed substantially the same as the inner circumferential surface of the upper space 314 , and thus the extension part 330 partitions the upper space 314 .

In addition, the extension part 330 moves up and down in the upper space 314 according to the up and down movement of the discharge rod 320, so that the cryogenic temperature is stored in the upper space 314. The material flows inside the upper space 314 according to the movement of the extension part 330 . This flow will be described later.

A first check valve 331 is provided inside the extension part 330 and operates so that the cryogenic material flows in only one direction. That is, the first check valve 331 blocks the movement of the cryogenic material stored in the upper part with respect to the extension part 330 to the lower part with respect to the extension part 330 .

Unlike this, the cryogenic material stored in the lower part based on the extension part 330 may be moved to the upper part based on the extension part 330 .

Although not shown, the contact portion 340 may be provided below the discharge rod 320 and protrude along the outer circumferential surface of the discharge rod 320 . Of course, this contact part 340 may be omitted depending on the embodiment, and as shown, the discharge rod 320 may slide while being in close contact with the second inner frame 312 as a whole.

The close contact part 340 slides along the inner circumferential surface of the lower space 315, and at the same time blocks the flow of the cryogenic material between the lower space 315 and the upper space 314, so that the two spaces plays a role in separating

In addition, a piston ring may be provided on an outer circumferential surface of the close contact portion 340 so as to be in close contact with the inner circumferential surface of the lower space 315 and slide.

Hereinafter, the operation of the valve unit 300 will be described with reference to FIGS. 3A and 3B.

First, referring to FIG. 3A , when the discharge rod 320 descends and the lower end of the discharge rod 320 is positioned on the outlet portion 316, the extension portion 330 is the inlet portion ( 313) is located below.

Thus, the cryogenic material is introduced into the upper space 314 through the inlet 313 and the upper space 314 is filled with the cryogenic material.

Then, referring to FIG. 3B , when the discharge rod 320 rises and the extension part 330 also rises on the upper space 314, the upper space 314 is pressurized by the extension part 330. The cryogenic material filled in ) moves downward along the inlet line 322 and the extension line 321 .

Thus, the cryogenic material is stored in the lower space 315 where a margin is generated while the discharge rod 320 rises.

After that, as shown in FIG. 3A , when the discharge rod 320 descends, the cryogenic material stored in the lower space 315 is pressed by the close contact part 340 to release the outlet part 316 . spilled out through

Thus, it is discharged to the outside through the discharge passage 250 .

4 is a cross-sectional view showing a cryogenic storage tank according to another embodiment of the present invention.

In the cryogenic storage tank 2 according to the present embodiment, except that the discharge passage 523 is formed along the discharge rod 520 and the extension rod 320, the cryogenic storage tank 1 described with reference to FIG. ), so the same reference numerals are used for the same components, and overlapping descriptions are omitted.

That is, referring to FIG. 4 , the discharge passage 523 (see FIG. 5A) in this embodiment is not formed along the pumping cylinder 210 as in the previous embodiment, and the discharge rod 520 and the It is formed directly inside the extension rod 320.

The structure of the discharge passage 523 will be described in detail through the description of the valve unit 301 with reference to FIGS. 5A and 5B below.

5A and 5B are cross-sectional views illustrating an operation of a valve unit in the discharge device of FIG. 4 .

Referring to FIGS. 5A and 5B , in the valve unit 301 in this embodiment, a discharge passage 523 is formed through the discharge rod 320 and the extension rod 520 . Accordingly, in FIGS. 1 and 2 , the discharge passage 250 formed penetrating the pumping cylinder 210 is not formed at all.

That is, the pumping cylinder 210 simply serves to cover the outside of the valve unit 301, and no separate discharge passage 250 is formed therein, and thus the radius of the pumping cylinder 210. may be formed relatively small.

Accordingly, since the overall volume formed by the pumping cylinder 210 decreases, the volume of the storage space 110 in which the cryogenic gas is stored relatively increases.

Meanwhile, in the present embodiment, the inlet line 522 formed in the discharge rod 320 is formed on both sides of the discharge rod 320, but as shown, the discharge passage 523 extending in the vertical direction and must be formed to be separated and spaced so as not to cross each other.

The cryogenic material introduced through the inlet line 522 flows along an extension line 521 extending downward in a direction perpendicular to the inlet line 522 and is provided to the lower space 315 .

In this case, the extension line 521 may also extend downward along a position biased toward one side of the discharge rod 320 in order to secure a space in which the discharge passage 523 is formed.

In addition, the discharge passage 523 extends parallel to the extension line 521 and passes through the discharge rod 320 while being spaced apart from the extension line 521 by a predetermined distance.

The lower end of the discharge passage 523 penetrates the lower surface of the discharge rod 320 and is opened so as to be open to the lower space 315.

In addition, as described above, the discharge passage 523 is spaced apart from the inlet line 522 at the portion where the inlet line 522 is formed, and the paths extend independently of each other.

The discharge passage 523 thus extended extends upward along the extension rod 520, and then, although not shown, is connected to a separate external discharge line, and thus, the cryogenic material can be discharged to the outside. there is.

Meanwhile, a second check valve 341 is formed at the lower end of the extension line 521 to limit the flow of the cryogenic material only in a direction from the extension line 521 toward the lower space 315.

Similarly, a third check valve 342 is also formed at the lower end of the discharge passage 523 to restrict the flow of the cryogenic material from the lower space 315 to the discharge passage 523 only.

Hereinafter, the operation of the valve unit 301 will be described with reference to FIGS. 5A and 5B.

First, referring to FIG. 5A , when the extension rod 520 and the discharge rod 320 descend and the lower end of the discharge rod 320 comes into contact with the bottom surface of the second inner frame 312, the Lower portions of the discharge passage 523 as well as the extension line 521 are all sealed.

Thus, the cryogenic material is introduced into the upper space 314 through the inlet 313 and the upper space 314 is filled with the cryogenic material.

After that, referring to FIG. 5B , when the discharge rod 320 and the extension rod 520 rise and the extension part 330 also rises on the upper space 314, the extension part 330 is pressurized. The cryogenic material filled in the upper space 314 moves downward along the inlet line 522 and the extension line 521 by .

At this time, since the lower ends of the extension line 521 and the discharge passage 523 are spaced apart from the bottom surface of the second inner frame 312 and a predetermined space is created at the bottom, the extension line 521 The cryogenic material moved along is stored on the lower space 315 .

After that, as shown in FIG. 5A, when the discharge rod 320 and the extension rod 520 descend, the cryogenic material stored in the lower space 315 is removed due to the third check valve 342. It flows only through the discharge passage 523 and is discharged to the outside along the discharge passage 523 in an upward direction as shown by an arrow.

FIG. 6 is an enlarged internal view of a driving unit in the cryogenic storage tank of FIG. 1 or 4 .

Referring to FIG. 6 , the drive unit 400 includes a gearbox 410, a drive unit 420, a worm gear unit 430, a worm wheel unit 440, and a drive transmission unit 450.

The gearbox 410 includes the worm gear unit 430, the worm wheel unit 440, and the drive transmission except for the first and second driving units 421 and 422 corresponding to the driving motor among the driving units 420. A predetermined space is formed to place the unit 450 therein.

The driving unit 420 includes a driving unit corresponding to at least one driving motor. In FIG. 6, the driving unit 420 includes a pair of first and second driving units 421 and 422. do.

Each of the first and second driving parts 421 and 422 may be a driving motor.

The worm gear part 430 includes a worm rod 343 extending in one direction, and the worm rod 343 generally extends in a direction perpendicular to the extension direction of the extension rod 220, and the worm A worm gear 433 is formed at the center of the rod 343.

In this case, the worm rod 343 has a shape in which the radius increases from the center toward both ends, and accordingly, the radius of the central portion where the worm gear 433 is formed is the smallest.

In addition, the first driving part 421 is connected to the first end 431 of the worm rod 343 to receive a driving force, and the second end 432 opposite to the first end 431 has the The second driving unit 422 is connected to receive driving force.

The worm wheel unit 440 includes a worm wheel 442 geared to the worm gear 433 and receiving a driving force, and a central portion 441 protruding from the center of the worm wheel 442.

The worm wheel 442 is engaged with the worm gear 433 and receives rotational driving force, and accordingly, the worm wheel 442 rotates with respect to the central portion 441 .

The driving transmission unit 450 includes a rotation unit 451, a transmission rod 452, a connection unit 453, a transmission guide 454, a transmission frame 455, and a guide cylinder 456.

The inner circumferential surface of the rotating part 451 is coupled to the outer circumferential surface of the central part 441, so that the rotating part 451 also rotates according to the rotation of the central part 441. Accordingly, the rotating part 451 rotates the worm Eccentric rotation is performed with respect to the wheel 442 .

Due to the eccentric rotation of the rotating part 451, the transfer rod 452 implements a reciprocating transfer drive in the vertical direction, that is, in the extension direction of the extension rod 220.

The connection part 453 connects the transmission rod 452 and the extension rod 220 to each other, and the transmission guide 454 reciprocates the transmission rod 452 and the extension rod 220 in a vertical direction. It guides the direction of movement to prevent deviation.

In this case, the guide cylinder 456 places the transfer guide 454 inside.

The transmission frame 455 serves to fix the transmission guide 454 on the gear box 410 .

As described above, the rotation driving force provided by the drive unit 420 induces an eccentric rotation drive of the rotation unit 451 through the worm gear 433 and the worm wheel 442, through which the transmission rod In 452, a reciprocating transfer drive in the vertical direction is implemented. Thus, the extension rod 220 performs a reciprocating transport drive in the vertical direction, and moves the discharge rod 320 in the vertical direction.

According to the embodiments of the present invention as described above, since the discharge passage for discharging the cryogenic material to the outside extends along the inside of the pumping cylinder, the discharge passage does not directly contact the cryogenic material stored in the chamber unit and does not directly contact the cryogenic material. Since effective insulation is performed, the discharged cryogenic material whose temperature has risen during the discharge process is blocked from performing heat transfer to the cryogenic material stored in the chamber unit, thereby preventing the temperature rise of the cryogenic material stored in the chamber unit in advance. .

That is, since the discharge passage passing through the pumping cylinder is insulated by the pumping cylinder, the rise in temperature of the cryogenic material stored in the chamber is blocked, and further, when the outside of the discharge passage is covered with an additional insulation, this insulation effect can be further improved. there is.

In particular, the pumping cylinder includes a first valve frame, a second valve frame, and a lower frame that are detachably coupled to each other, and discharge passages are formed in each frame, and as the respective frames are coupled to each other, the discharge passages are mutually connected to each other. Since it is open and extends to the outside, it is possible to easily form an extended discharge passage only by coupling the respective frames of the pumping cylinder to each other without forming a separate discharge passage on the inside of the pumping cylinder.

This has the advantage of easy assembly and separation of the pumping cylinder, and can improve the convenience of repairing the pumping cylinder.

In this case, the discharge passage formed in the lower frame of the pumping cylinder is extended to change direction, and in the frame constituting the other pumping cylinders, if a discharge passage extending in a straight line is formed without considering the direction change of the discharge passage Since it is sufficient, the ease of manufacture of the pumping cylinder as a whole is improved.

Unlike this, since the discharge oil is formed through the discharge rod, a separate opening line may not be formed on the pumping cylinder, thereby preventing the problem of increasing the volume of the pumping cylinder, and furthermore, the discharge line By minimizing the length of , simpler design and operation can be implemented.

In addition, in the drive unit for reciprocating the extension rod, by applying a worm gear unit, a worm wheel unit, and a drive transmission unit that convert rotational drive into linear drive, a speed reducer for reducing the speed of a conventional motor is applied to have a complicated structure The driving unit can be manufactured to enable relatively simple and accurate driving.

In particular, since the central diameter of the worm rod constituting the worm gear part is smaller than the diameter of both ends, the driving stability can be improved when a pair of driving parts are applied, and it has high durability with low noise and provides driving force can do.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention described in the claims below. You will understand that you can.

1: cryogenic storage tank 100: chamber part
200: discharge device 210: pumping cylinder
220, 520: extension rod 240: lower valve
250, 523: discharge flow path 255: insulation
300, 301: valve unit 310: inner frame
320: discharge rod 321, 521: extension line
322, 522: inlet line 330: extension
340: contact part 400: driving unit
430: worm gear part 440: worm wheel part
450: drive transmission unit

Claims (13)

A discharge device for discharging the cryogenic material from a chamber in which the cryogenic material is stored to the outside,
a pumping cylinder positioned through the chamber;
an extension rod extending inside the pumping cylinder;
a valve unit discharging the cryogenic material to the outside according to the operation of the extension rod; and
A discharge passage extending from the inside of the pumping cylinder from the valve part to the outside, through which the cryogenic material moves,
The valve unit includes a discharge rod connected to the extension rod and reciprocating, and a first inner frame forming an upper space in which the cryogenic material is introduced from the chamber unit and is primarily stored. . The method of claim 1, wherein the pumping cylinder,
The discharge device characterized in that for insulation between the cryogenic material stored in the chamber unit and the cryogenic material moving along the discharge passage. According to claim 2,
A discharge device characterized in that a heat insulating portion is formed along the outer surface of the discharge passage. The method of claim 1, wherein the valve unit,
and a second inner frame forming a lower space in which the cryogenic material flowing along the discharge rod from the upper space according to the movement of the discharge rod is stored before being discharged. The method of claim 4, wherein the pumping cylinder,
a first valve frame integrally formed with the first inner frame and through which the discharge passage passes; and
and a second valve frame integrally formed with the second inner frame and through which the discharge passage passes. According to claim 5,
The pumping cylinder further includes a lower frame formed under the second valve frame,
The discharge passage may include a first line portion passing through the lower frame and changing direction. According to claim 6,
The first valve frame, the second valve frame and the lower frame are separably connected,
The discharge device characterized in that, as the first valve frame, the second valve frame and the lower frame are connected, the discharge passages open and extend each other. The method of claim 4, wherein the valve unit,
an inlet formed to pass through the first inner frame, through which the cryogenic material flows into the upper space;
an extension portion extending from a side surface of the discharge rod and having a check valve formed therein to move the cryogenic material introduced into the upper space into the discharge rod; and
The discharge device further comprises a contact portion formed at an end of the discharge rod, in close contact with the second inner frame, and discharging the cryogenic material stored in the lower space to the discharge passage. According to claim 4,
The discharge passage is formed to pass through the discharge rod and extend along the extension rod. According to claim 9,
After the cryogenic material stored in the upper space is moved to the lower space along an extension line extending along the discharge rod and stored,
Discharge device characterized in that the discharge to the outside along the discharge passage extending parallel to the extension line. According to claim 1,
Further comprising a driving unit for reciprocating the extension rod,
The driving unit is
at least one driving unit generating a driving force;
a worm gear unit connected to the driving unit;
A worm wheel unit that is connected to the worm gear unit and rotates; and
and a drive transmission unit which rotates eccentrically with respect to the worm wheel unit and converts rotational driving force of the worm wheel unit into linear driving force of the extension rod. According to claim 11,
The worm gear unit includes a worm rod to which the drive unit is connected to at least one of both ends and a worm gear is formed in the center,
The worm rod is a discharge device, characterized in that the diameter decreases from both ends toward the center. The discharge device according to any one of claims 1 to 12;
The chamber portion through which the ejection device penetrates along the center;
a central frame fixed to the outside of the chamber unit;
a fixing frame fixing the chamber part and the central frame;
an upper fixing frame for fixing the discharge device extending and exposed to an upper portion of the chamber unit to the central frame; and
Cryogenic storage tank comprising a cover frame covering the outside of the upper fixed frame.

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