Vacuum piping for cryogenic liquefied hydrogen

Abstract

The present invention relates to a vacuum pipe for cryogenic liquid hydrogen, wherein a first assembly (10) and a second assembly (30) are coupled to each other in order to prevent the mixing of external air during fluid transfer and to maximize the speed and accuracy of the assembly process by enabling a fitting connection through a fastening member formed on the edge portion of a mutually facing flange, the vacuum pipe for cryogenic liquid hydrogen comprises: a first outer tube (11) in the shape of a cylinder; a first inner tube (12) having a passage portion (S1) through which liquid hydrogen moves, spaced apart from the internal space of the first outer tube (11); and a first flange (20) provided on the front side of the first outer tube (11), wherein a vacuum portion (S2) is formed between the first outer tube (11) and the first inner tube (12). The first bayonet (13) is formed by being protruded forward from the first flange (20), with the rear connecting side receiving and connecting the first inner tube (12) and the front protruding side extending outward by the same length as the first inner tube (12); and the second assembly (30) comprises: a second outer tube (31) having the same shape and size as the first outer tube (11); a second inner tube (32) having a passage section (S1) through which liquid hydrogen moves, which protrudes forward from the second outer tube (31); a second flange (40) provided on the rear side of the second outer tube (31), with a vacuum section (S3) formed between the second outer tube (31) and the second inner tube (32); and a second bayonet that receives the first bayonet (13) inserted into the inner side of the second outer tube (31).It is composed of, and when the first assembly (10) and the second assembly (30) are combined, the first flange (20) and the second flange (40) facing each other are in close contact, wherein the first flange (20) is provided with a first fastening member (50) having a horizontal opening groove (54) formed on the front side, and the second flange (40) is provided with a second fastening member (60) having an outer horizontal protrusion (63) formed to be coupled facing the horizontal opening groove (54) of the first fastening member (50), and a triangular groove portion (54a) continuous on the upper and lower surfaces of the horizontal opening groove (54) is formed protruding, and a triangular protrusion (63a) corresponding to the triangular groove portion (54a) is formed protruding on the upper and lower surfaces of the outer horizontal protrusion (63), so as to the first assembly (10) and When the second assembly (30) is combined, the triangular protrusion (63a) of the outer horizontal protrusion (63) is configured to be fitted into the triangular groove (54a) of the horizontal open groove (54) in stages according to distance.;

Description

Technology Field

[0001] The present invention relates to a vacuum pipe for cryogenic liquid hydrogen, and more specifically, to a vacuum pipe for cryogenic liquid hydrogen that prevents the mixing of outside air during fluid transfer and maximizes the speed and accuracy of the assembly process by enabling fitting through a fastening member formed on the edge portion of the flanges facing each other.

[0002] In addition, this invention is a study supported by the BB21plus project of Busan Metropolitan City and Busan Technopark. Background Technology

[0003] Generally, vacuum-insulated piping with excellent thermal insulation properties is used for the transport of cryogenic liquid hydrogen.

[0004] Since vacuum insulated piping has a double-pipe structure including an inner and outer pipe, it is not easy to fabricate and install it directly on-site. Therefore, vacuum insulated piping with a double-pipe structure is fabricated in advance at a piping factory, and the piping is installed by connecting the pre-fabricated vacuum insulated piping on-site.

[0005] A pipe connection method using a bayonet-type coupling can be applied to the method of connecting vacuum-insulated pipes.

[0006] In the prior art Korean Registered Utility Model Publication No. 20-0203444, a vacuum insulation pipe of a bayonet-type connection method is disclosed, wherein an inner pipe (2, 2') through which liquefied gas flows and an outer pipe (3) that prevents heat intrusion from the outside are provided, and between the inner pipe (2, 2') and the outer pipe (3), a male bayonet (6) connected to a male flange (4) and a female bayonet (7) connected to a female flange (5) are arranged.

[0007] However, the bayonet-type vacuum insulation pipe of the prior art has a problem in that there is a possibility of leakage occurring between the male bayonet (6) and the female bayonet (7) when used for a long period of time.

[0008] In addition, when connecting pipes, the flange had a cross-section larger than its external appearance, which resulted in a problem of reduced space utilization during pipe installation. Prior art literature

[0009] Registered Utility Model Publication No. 20-0203444 The problem to be solved

[0010] Accordingly, the present invention was devised to eliminate the aforementioned problems, and was completed as a technical objective by focusing on a vacuum pipe for cryogenic liquid hydrogen that prevents the mixing of external air during fluid transfer and maximizes the speed and accuracy of the assembly process by enabling a snap-fit ​​connection through a fastening member formed on the edge of the mutually facing flanges. means of solving the problem

[0011] The present invention for achieving the above technical problem comprises a vacuum pipe for cryogenic liquid hydrogen in which a first assembly (10) and a second assembly (30) are coupled to each other, wherein the first assembly (10) comprises: a cylindrical first outer tube (11); a first inner tube (12) having a passage portion (S1) through which liquid hydrogen moves, spaced apart from the internal space of the first outer tube (11); and a first flange (20) provided on the front side of the first outer tube (11), wherein a vacuum portion (S2) is formed between the first outer tube (11) and the first inner tube (12). The first assembly (30) is composed of a first bayonet (13) that protrudes forward from the first flange (20), wherein the rear coupling side receives and is coupled to the first inner tube (12), and the front protruding side extends outward with the same length as the first inner tube (12); and the second assembly (30) comprises: a second outer tube (31) having the same shape and size as the first outer tube (11); a second inner tube (32) that protrudes forward from the second outer tube (31) and has a passage section (S1) through which liquid hydrogen moves; a second flange (40) that is provided on the rear side of the second outer tube (31), wherein a vacuum section (S3) is formed between the second outer tube (31) and the second inner tube (32). The apparatus comprises a second bayonet that accommodates a first bayonet (13) inserted into the inner side of the second outer casing (31); wherein, when the first assembly (10) and the second assembly (30) are combined, the first flange (20) and the second flange (40) facing each other are in close contact, the first flange (20) is provided with a first fastening member (50) having a horizontal opening groove (54) formed on the front side, and the second flange (40) is provided with a second fastening member (60) having an outer horizontal protrusion (63) formed to face and be coupled to the horizontal opening groove (54) of the first fastening member (50), and a triangular groove (54a) that is continuous is formed protrudingly on the upper and lower surfaces of the horizontal opening groove (54), and on the upper and lower surfaces of the outer horizontal protrusion (63) the A triangular protrusion (63a) corresponding to the triangular groove (54a) is formed protrudingly, so that when the first assembly (10) and the second assembly (30) are combined,The triangular protrusion (63a) of the outer horizontal protrusion (63) is configured to be fitted and coupled stepwise according to distance to the triangular groove (54a) of the horizontal opening groove (54), and the first fastening member (50) has the outer horizontal protrusion (53), the vertical part (52), and the inner horizontal protrusion (51) formed in a “C” shape so that the horizontal opening groove (54) is formed on the front side of the first flange (20), and the second fastening member (60) has the outer horizontal protrusion (63), the vertical part (62), and the inner horizontal protrusion (61) formed in a “C” shape so that the horizontal opening groove (64) is formed on the rear side of the second flange (40), and the outer horizontal protrusion (63) of the second fastening member (60) is coupled facing the horizontal opening groove (54) of the first fastening member (50). The inner horizontal protrusion (51) of the first fastening member (50) is configured to be coupled facing the horizontal opening groove (64) of the second fastening member (60), and a sealing member (94) is provided on the inner surface of the second outer casing (31) to which the front end of the first bayonet (13) is in contact and to be finished, and a sealing member (92) is provided on the inner surface of the first outer casing (11) to which the rear end of the first bayonet (13) is in contact and to be finished, and a first protective outer casing (15) and a second protective outer casing (35) are further provided on the outer sides of the first outer casing (11) and the second outer casing (31), wherein the first protective outer casing (15) and the second protective outer casing (35) are formed in the shape of a circular casing so as to be spaced apart from the outer sides of the first outer casing (11) and the second outer casing (31) and to have a vacuum state in the space between them. The vacuum-maintaining effect is maximized by further forming sealing portions (S4, S5), and a first inclined portion (19) is formed between the first outer casing (11) and the first flange portion (20) so as to slope downward from the first outer casing (11) toward the first flange portion (20), and a second inclined portion (39) is formed between the second outer casing (31) and the second flange portion (40) so as to slope downward from the second outer casing (31) toward the second flange portion (40), and a connecting portion protective outer casing (89) is further provided between the first protective outer casing (15) and the second protective outer casing (35).The above-mentioned joint protective outer casing (89) is provided such that both sides are provided to be in close contact with the inner sides of the first protective outer casing (15) and the second protective outer casing (35), and the joint protective outer casing (89) is formed in the shape of a circular casing that accommodates the first fastening member (50), the second fastening member (60), the sealing member (92), the first inclined part (19), and the second inclined part (39), thereby forming another sealing part (S6) to further maximize the vacuum maintenance effect, thereby providing a vacuum pipe for cryogenic liquid hydrogen.

[0012] delete

[0013] delete Effects of the invention

[0014] According to the present invention described above, the mixing of external air during fluid transfer is prevented, and the speed and accuracy of the assembly process can be maximized by allowing the parts to be fitted together through a fastening member formed on the edge portion of the flanges facing each other. Brief explanation of the drawing

[0015] FIG. 1 is an exemplary diagram of the disassembled state of a vacuum pipe for cryogenic liquid hydrogen according to the present invention. FIG. 2 is an exemplary illustration of the state during the combination of FIG. 1. FIG. 3 is an exemplary illustration of the state after combination of FIG. 1. FIG. 4 is an exemplary illustration of the cross-sectional state of FIG. 3. FIG. 5 is an exemplary diagram of a modified embodiment according to the present invention. Specific details for implementing the invention

[0016] The specific details for implementing the present invention will be explained in more detail below with reference to the attached drawings.

[0017] The present invention relates to a vacuum pipe for cryogenic liquid hydrogen that prevents the mixing of outside air during fluid transfer and maximizes the speed and accuracy of the assembly process by allowing the parts to be fitted together through a fastening member formed on the edge portion of the flanges facing each other. Referring to FIGS. 1 to 5, it comprises a first assembly (10) and a second assembly (30).

[0018] Piping can be widely used to transport fluids or powders in various industrial facilities. Among them, piping for transporting ultra-low temperature liquefied gases, such as liquefied gas, requires excellent thermal insulation as a characteristic.

[0019] Generally, cryogenic liquefied gas has a vaporization temperature lower than room temperature and a small latent heat, so it vaporizes easily with a small heat supply. Therefore, at the site, vacuum-insulated pipes with excellent thermal insulation properties are used to transport cryogenic liquefied gas from storage tanks to equipment that requires the gas.

[0020] The vacuum-insulated piping can be constructed with a double-walled outer tube structure to maintain a vacuum on the outside of an inner tube through which ultra-low temperature liquefied gas travels. The vacuum space between the outer and inner tubes can prevent cooling loss of the ultra-low temperature liquefied gas traveling through the inner tube, and additionally, insulation films can be attached to the outer and inner tubes to further enhance insulation performance.

[0021] Due to their structural characteristics, vacuum-insulated piping cannot be easily cut to length on-site like standard piping. Therefore, piping work can be performed by manufacturing vacuum-insulated pipes in advance at a piping factory according to the specifications required at the site, and then connecting them on-site.

[0022] A pipe connection method using a bayonet-type coupling can be applied to connect these vacuum-insulated pipes.

[0023] Accordingly, the vacuum piping for cryogenic liquid hydrogen of the present invention is configured such that the first assembly (10) and the second assembly (30) are combined with each other as shown in FIGS. 1 and 2.

[0024] Looking at the configuration of the first assembly (10) in detail, first, a cylindrical first outer tube (11) is provided, and a first inner tube (12) is provided that has a passage section (S1) through which liquid hydrogen moves, spaced apart from the internal space of the first outer tube (11).

[0025] At this time, as shown in FIG. 5, a vacuum section (S2) is formed between the first outer tube (11) and the first inner tube (12), thereby providing the vacuum piping structure of the present invention.

[0026] In addition, a first flange (20) is provided on the front side of the first outer casing (11).

[0027] And, a first bayonet (13) is configured to protrude forward from the first flange (20), wherein the rear coupling side receives and is coupled to the first inner tube (12), and the front protruding side extends outward with the same length as the first inner tube (12).

[0028] Meanwhile, looking in detail at the configuration of the second assembly (30) corresponding to the first assembly (10), as shown in FIGS. 1 and 2, a second outer tube (31) having the same shape and size as the first outer tube (11) is provided, and a second inner tube (32) having a passage (S1) protruding from the front side of the second outer tube (31) through which liquid hydrogen moves is provided.

[0029] At this time, as shown in FIG. 5, a vacuum section (S3) is formed between the second outer tube (31) and the second inner tube (32), thereby providing the vacuum piping structure of the present invention.

[0030] In addition, a second flange (40) is provided on the rear side of the second outer casing (31) to be in close contact with the first flange (20).

[0031] And, a second bayonet (not shown) is configured to accommodate the first bayonet (13) inserted into the inner side of the second outer tube (31).

[0032] In the above structure, when the first assembly (10) and the second assembly (30) are combined as shown in FIGS. 2 and 3, the first flange (20) and the second flange (40) facing each other are in close contact. The first flange (20) is provided with a first fastening member (50) having a horizontal opening groove (54) formed on the front side, and the second flange (40) is provided with a second fastening member (60) having an outer horizontal protrusion (63) formed to be coupled facing the horizontal opening groove (54) of the first fastening member (50). A triangular groove (54a) is formed protrudingly on the upper and lower surfaces of the horizontal opening groove (54), and a triangular protrusion (63a) corresponding to the triangular groove (54a) is formed protrudingly on the upper and lower surfaces of the outer horizontal protrusion (63). When the first assembly (10) and the second assembly (30) are combined, the triangular protrusion (63a) of the outer horizontal protrusion (63) is configured to be fitted into the triangular groove (54a) of the horizontal open groove (54) in stages.

[0033] According to the above structure, the triangular protrusion (63a) of the outer horizontal protrusion (63) is fitted into the triangular groove (54a) of the horizontal open groove (54) in stages, thereby allowing the separation distance to be adjusted as needed during mutual connection. In addition, even if the bolted connection between the first flange (20) and the second flange (40) facing each other becomes loose, the airtight state can be maintained for a certain period of time, thereby preventing safety accidents.

[0034] More specifically, the first fastening member (50) is formed with an outer horizontal protrusion (53), a vertical part (52), and an inner horizontal protrusion (51) in a “C” shape, so that a horizontal opening groove (54) is formed on the front side of the first flange (20), and the second fastening member (60) is formed with an outer horizontal protrusion (63), a vertical part (62), and an inner horizontal protrusion (61) in a “C” shape, so that a horizontal opening groove (64) is formed on the rear side of the second flange (40).

[0035] And, the outer horizontal protrusion (63) of the second fastening member (60) is coupled facing the horizontal open groove (54) of the first fastening member (50), and the inner horizontal protrusion (51) of the first fastening member (50) is coupled facing the horizontal open groove (64) of the second fastening member (60).

[0036] delete

[0037] delete

[0038] Meanwhile, as shown in FIG. 1, a first inclined section (19) may be formed between the first outer section (11) and the first flange section (20) so as to be inclined downward from the first outer section (11) toward the first flange section (20), and a second inclined section (39) may be formed between the second outer section (31) and the second flange section (40) so as to be inclined downward from the second outer section (31) toward the second flange section (40). At this time, although not shown, a vacuum cover may be placed over a groove formed on the outer side of the first inclined section (19) and the second inclined section (39) to maintain a vacuum state.

[0039] In addition, as shown in FIG. 5, a sealing member (94) is provided on the inner surface of the second outer casing (31) to which the front end of the first bayonet (13) is in contact, and a sealing member (92) is provided on the inner surface of the first outer casing (11) to which the rear end of the first bayonet (13) is in contact, so as to be finished.

[0040] As a modified embodiment of the present invention, as shown in FIG. 5, a first protective outer casing (15) and a second protective outer casing (35) may be further provided on the outer sides of the first outer casing (11) and the second outer casing (31). In this case, the first protective outer casing (15) and the second protective outer casing (35) are formed in the shape of a circular casing so that a sealing portion (S4, S5) is further formed in the space between the first outer casing (11) and the second outer casing (31), while being spaced apart from each other. The sealing portion (S4, S5) is in a vacuum state, thereby maximizing the vacuum maintenance effect of the present invention.

[0041] Additionally, as shown in FIG. 5, a connecting part protective outer casing (89) may be further provided between the first protective outer casing (15) and the second protective outer casing (35). At this time, the connecting part protective outer casing (89) is formed in the shape of a circular casing that accommodates the first fastening member (50), the second fastening member (60), the first inclined part (19), and the second inclined part (39), thereby forming another sealing part (S6) to further maximize the vacuum maintenance effect.

[0042] According to the vacuum piping for cryogenic liquid hydrogen of the present invention as described above, the mixing of outside air during fluid transfer is prevented, and the speed and accuracy of the assembly process are maximized by allowing the parts to be fitted together through a fastening member formed on the edge portion of the mutually facing flanges.

[0043] The present invention described above has been explained with reference to an exemplary embodiment illustrated in the drawings, but this is merely illustrative, and it should be made clear to those skilled in the art that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be interpreted by the appended claims, and all technical ideas within an equivalent scope should be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0044] 10 : 1st Assembly 11 : 1st Appearance 12: 1st Inner Tube 13: 1st Bayonet 20 : 1st flange 30 : 2nd assembly 31 : 2nd outer casing 32 : 2nd inner casing 33 : 2nd bayonet 40 : 2nd flange 50 : First fastening member 60 : Second fastening member

Claims

Claim 1 In a vacuum pipe for cryogenic liquid hydrogen in which a first assembly (10) and a second assembly (30) are joined together, the first assembly (10) comprises: a cylindrical first outer tube (11); and a first inner tube (12) having a passage portion (S1) through which liquid hydrogen moves, spaced apart from the internal space of the first outer tube (11). A vacuum section (S2) is formed between the first outer tube (11) and the first inner tube (12), and a first flange (20) is provided on the front side of the first outer tube (11); a first bayonet (13) is protruded toward the front side of the first flange (20), wherein the rear coupling side receives and is coupled to the first inner tube (12), and the front protruding side extends outward with the same length as the first inner tube (12); and the second assembly (30) comprises a second outer tube (31) having the same shape and size as the first outer tube (11); and a second inner tube (32) having a passage section (S1) through which liquid hydrogen moves, which protrudes toward the front side of the second outer tube (31). A vacuum section (S3) is formed between the second outer tube (31) and the second inner tube (32), and a second flange (40) is provided on the rear side of the second outer tube (31); and a second bayonet that accommodates a first bayonet (13) inserted into the inner side of the second outer tube (31); wherein, when the first assembly (10) and the second assembly (30) are combined, the first flange (20) and the second flange (40) facing each other are in close contact, and the first flange (20) is provided with a first fastening member (50) having a horizontal opening groove (54) formed on the front side, and the second flange (40) is provided with a second fastening member (60) having an outer horizontal protrusion (63) formed to face and be coupled to the horizontal opening groove (54) of the first fastening member (50), and the A continuous triangular groove portion (54a) is formed protrudingly on the upper and lower surfaces of the horizontal open groove (54), and a triangular protrusion portion (63a) corresponding to the triangular groove portion (54a) is formed protrudingly on the upper and lower surfaces of the outer horizontal protrusion portion (63), so that when the first assembly (10) and the second assembly (30) are combined, the triangular protrusion portion (63a) of the outer horizontal protrusion portion (63) is configured to be fitted and coupled to the triangular groove portion (54a) of the horizontal open groove (54) in stages according to distance.The first fastening member (50) is formed with an outer horizontal protrusion (53), a vertical part (52), and an inner horizontal protrusion (51) in a "C" shape, so that a horizontal opening groove (54) is formed on the front side of the first flange (20), and the second fastening member (60) is formed with an outer horizontal protrusion (63), a vertical part (62), and an inner horizontal protrusion (61) in a "C" shape, so that a horizontal opening groove (64) is formed on the rear side of the second flange (40), and the outer horizontal protrusion (63) of the second fastening member (60) is coupled to the horizontal opening groove (54) of the first fastening member (50) facing it, and the inner horizontal protrusion (51) of the first fastening member (50) is coupled to the horizontal opening groove (64) of the second fastening member (60) facing it. The inner surface of the second outer casing (31), to which the front end of the first bayonet (13) is in contact, is provided with a sealing member (94) to be finished, and the inner surface of the first outer casing (11), to which the rear end of the first bayonet (13) is in contact, is also provided with a sealing member (92) to be finished. The first protective outer casing (15) and the second protective outer casing (35) are further provided on the outer sides of the first outer casing (11) and the second outer casing (31), wherein the first protective outer casing (15) and the second protective outer casing (35) are formed in the shape of a circular casing, thereby further forming a sealing portion (S4, S5) that is spaced apart from the outer sides of the first outer casing (11) and the second outer casing (31) and has a vacuum state in the space between them to maximize the vacuum maintenance effect. Between the first outer casing (11) and the first flange portion (20), from the first outer casing (11) A first inclined section (19) is formed to be inclined downward in the direction of the first flange section (20), and a second inclined section (39) is formed between the second outer section (31) and the second flange section (40) to be inclined downward from the second outer section (31) to the direction of the second flange section (40), and a connecting section protective outer section (89) is further provided between the first protective outer section (15) and the second protective outer section (35), wherein both sides of the connecting section protective outer section (89) are provided to be in close contact with the inner sides of the first protective outer section (15) and the second protective outer section (35), and the connecting section protective outer section (89) is the first fastening member (50), the second fastening member (60), the sealing member (92),A vacuum pipe for cryogenic liquid hydrogen characterized by being formed in the shape of a circular casing that accommodates a first inclined section (19) and a second inclined section (39), and configured to form another sealing section (S6) to further maximize the vacuum maintenance effect. Claim 2 delete Claim 3 delete Claim 4 delete

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