Connectors for ultra-low temperature and high-pressure gases

Abstract

To maintain the liquefied state of ultra-low temperature, high-pressure gases, this invention provides a connector with a double vacuum insulation structure that minimizes external heat transfer to the connector, prevents frost formation on the connector, and improves worker safety and connector durability. [Solution] A connector for ultra-low temperature high-pressure gas, comprising a bayonet dry coupling nozzle comprising a hose nozzle insertion portion provided on one side of a double nozzle body having a vacuum insulation layer and a first opening / closing disc unit provided on the other side of the double nozzle body, and a bayonet dry coupling adapter comprising a nozzle insertion portion provided on one side of a double adapter body having a vacuum insulation layer and fastened to an adapter connection projection, an adapter projection provided on the other side of the double adapter body and fastened to the tank side, and a second opening / closing disc unit that opens and closes a flow path when the double nozzle body and the double adapter body are coupled.

Description

Technical Field

[0001] The present invention relates to a connector for ultra-low temperature and high-pressure gas, and more specifically, to a Bayonet dry coupling type connector for ultra-low temperature and high-pressure gas, which is composed of a male and a female pair provided on the tank side and the hose side.

Background Art

[0002] A connector for ultra-low temperature and high-pressure gas can quickly fasten and separate a tank and a hose in the process of loading and unloading ultra-low temperature and high-pressure gas such as liquefied helium using a hose, and can quickly block the leakage of ultra-low temperature and high-pressure gas remaining in the hose during separation. It is a connector composed of a male and a female pair provided on the tank side and the hose side.

[0003] Conventional connectors with the above functions have problems such as significant heat transfer from the outer wall of the main body and significant generation of frost, which cause a phase change of the liquefied gas during loading and unloading, and have an adverse impact on the safety of operators due to frost and the durability of the connector.

[0004] When supplying flammable substances such as LNG, liquefied hydrogen, and LPG, which have a risk of explosion in case of leakage, from one tank to another using a hose among ultra-low temperature and high-pressure gases, a dry disconnect / connect coupling (hereinafter, dry coupling) is usually used for work efficiency and safety.

[0005] The contactor is an essential device applied to a bunkering system for LNG and liquefied hydrogen ships, onshore LNG filling stations, LPG filling stations, liquefied hydrogen production bases, and filling stations.

[0006] Referring to FIG. 1, a conventional dry coupling consists of a pair of a nozzle and an adapter. The nozzle is fastened to the end of the hose, and the adapter is attached to the filling port or discharge port on the tank side.

[0007] To connect the hose to the tank and allow fluid to flow, the nozzle handle is grasped and the nozzle is inserted axially into the adapter, bringing the nozzle disc and adapter disc into close contact. Then, the handle is rotated in one direction, causing the nozzle disc push link of the nozzle to move a certain distance toward the adapter. This push link pushes the adapter disc axially backward, opening the flow path between the nozzle and the adapter. This allows fluid to flow through the opened channel.

[0008] Conversely, to disconnect the hose from the tank and shut off the flow path, the handle is rotated in the opposite direction to the aforementioned rotation while separating it from the adapter. This causes the nozzle disc to move backward with the push link and make close contact with the nozzle disc seat, while the adapter disc moves forward towards the adapter's open port side by the disc return spring and makes close contact with the adapter disc seat. As a result, the nozzle and adapter separate, closing the flow path and quickly preventing leakage of residual fluid in the hose.

[0009] However, despite these conventional functions, the dry coupling consists of only one cylindrical nozzle and adapter, which leads to serious heat transfer due to the temperature difference between the ultra-low temperature high-pressure gas inside the dry coupling and the temperature of the outside atmosphere. This causes thick frost to form on the outside of the nozzle and adapter, and the liquefied high-pressure gas inside undergoes a phase change to a gas due to the invading heat.

[0010] Therefore, to resolve these problems, a connector with an insulating structure, unlike conventional connectors, is required. [Prior art documents] [Patent Documents]

[0011] [Patent Document 1] Registered Patent Gazette No. 10-2531191 of the Republic of Korea [Overview of the Initiative] [Problems that the invention aims to solve]

[0012] The object of the present invention, devised in consideration of conventional problems, is to provide a connector for ultra-low temperature, high-pressure gases having a double vacuum insulation structure that minimizes external heat transfer to the connector part in order to maintain the liquefied state of ultra-low temperature, high-pressure gases, prevents frost from forming on the connector body, and improves worker safety and connector durability. [Means for solving the problem]

[0013] A connector for ultra-low temperature high-pressure gas according to an embodiment of the present invention for solving the above technical problems is a connector for ultra-low temperature high-pressure gas consisting of a male and female pair provided on the tank side and the hose side, and is characterized by including a bayonet dry coupling nozzle comprising a double nozzle body having a vacuum insulation layer, a hose nozzle insertion portion provided on one side of the double nozzle body and fastened to the end of the hose side, an adapter connection projection provided on the other side of the double nozzle body, and a first opening / closing disk unit provided at the end of the adapter connection projection, and a bayonet dry coupling adapter comprising a double adapter body having a vacuum insulation layer, a nozzle insertion portion provided on one side of the double adapter body and fastened to the adapter connection projection, an adapter projection provided on the other side of the double adapter body and fastened to the filling port or discharge port on the tank side, and a second opening / closing disk unit provided between the nozzle insertion portion and the adapter projection, which pushes the first opening / closing disk unit to open and close the flow path when the double nozzle body and the double adapter body are coupled.

[0014] In another embodiment, the double nozzle body of the present invention is characterized by comprising: a hollow tubular first inner body; a hollow tubular first outer body disposed on the outer circumference of the first inner body; a first seal cap coupled to one side end of the first inner body and the first outer body, sealing while maintaining a gap for forming the first vacuum insulation layer; and a first seal tip coupled to one side end of the first inner body and the first outer body, sealing while maintaining a gap for forming the first vacuum insulation layer.

[0015] In another embodiment, a ring-shaped rotating flange is connected to the outer circumference of the first seal cap of the present invention via a guard ring, and a first seal O-ring for sealing is provided on the outer side surface of the first seal cap when the hose end is fastened to the hose nozzle insertion portion.

[0016] In another embodiment, the first opening / closing disk unit of the present invention includes a first guide holder provided on the first seal tip via a ring-shaped disk sheet and having a plurality of flow channels formed thereon; an opening / closing disk provided via an opening / closing disk shaft that guides through the center of the first guide holder and opens or closes the flow channels of the disk sheet; and a return spring provided between the first guide holder and the opening / closing disk, around the opening / closing disk shaft, wherein the return spring is characterized in that when the push pressure is released, the opening / closing disk closes the opening of the disk sheet.

[0017] In another embodiment, the first internal body of the present invention comprises a first inner large-diameter portion that forms the hose nozzle insertion portion and a first inner small-diameter portion that forms the adapter connection protrusion, wherein the first inner large-diameter portion and the first inner small-diameter portion are joined around their two ends that are in contact with each other by a ring-shaped first internal seal sheet.

[0018] In another embodiment, the first external body of the present invention comprises a first external large-diameter portion formed concentrically on the outer circumference of the first internal large-diameter portion and a first external small-diameter portion formed concentrically on the outer circumference of the first internal small-diameter portion, wherein the first external large-diameter portion and the first external small-diameter portion are joined around their respective contacting ends by a ring-shaped external sealing sheet.

[0019] In another embodiment, the outer circumference of the external seal sheet of the present invention is provided with a nozzle cover having a lock pin formed on one side of its inner circumference that is attached to and detached from one side of the double adapter body, and a nozzle handle is provided on one side of the outer circumference of the nozzle cover.

[0020] In another embodiment, the double adapter body of the present invention is characterized by comprising: a hollow tubular second inner body; a hollow tubular second outer body disposed on the outer circumference of the second inner body; a second seal cap coupled to one end of the second inner body and the second outer body, sealing while maintaining a gap for forming the second vacuum insulation layer; and a second seal tip coupled to one end of the second inner body and the second outer body, sealing while maintaining a gap for forming the second vacuum insulation layer.

[0021] In another embodiment, the second internal body of the present invention comprises a second large-diameter inner portion that forms the nozzle insertion portion and a second small-diameter inner portion that forms the adapter protrusion portion, wherein the second large-diameter inner portion and the second small-diameter inner portion are joined together by a ring-shaped second internal seal sheet around both ends that are in contact with each other.

[0022] In another embodiment, the second outer body of the present invention comprises a second outer large-diameter portion formed concentrically on the outer circumference of the second inner large-diameter portion, and a second outer small-diameter portion formed concentrically on the outer circumference of the second inner small-diameter portion, wherein the second outer large-diameter portion and the second outer small-diameter portion are joined around their respective contact ends by ring-shaped flanges.

[0023] As another embodiment, a locking groove for detaching and attaching to the locking pin is formed at the center of the outer periphery of the second seal cap of the present invention, and a seal is provided at the end of the outer periphery of the second seal tip.

[0024] As another embodiment, the second opening and closing disk unit of the present invention includes a second guide holder provided in front of the inner peripheral surface of the second inner seal sheet and having a plurality of flow paths, an opening and closing ring disk provided behind the inner peripheral surface of the second inner seal sheet and having a plurality of flow paths, a push disk provided at the center of the second guide holder via a push disk shaft, and a push spring provided around the push disk shaft between the second guide holder and the opening and closing ring disk. The push spring is characterized in that when the push pressure is released, the push disk closes the plurality of flow paths of the opening and closing ring disk.

Advantages of the Invention

[0025] The connector for ultra-low temperature and high-pressure gas provided on the tank side and the hose side of the present invention is composed of a male and female pair including a bayonet dry coupling nozzle of a double nozzle body having a vacuum insulation layer and a bayonet dry coupling adapter of a double adapter body having a vacuum insulation layer, and thus has the following advantages.

[0026] First, since the heat loss generated by the double nozzle body having a vacuum insulation layer and the double adapter body having a nozzle and a vacuum insulation layer can be minimized, the heat loss to the outside can be minimized.

[0027] Secondly, when the double nozzle body having a vacuum insulation layer and the double adapter body having a nozzle and a vacuum insulation layer are connected in a corresponding manner, the heat transfer distance is increased to minimize heat conduction at the parts exposed to the cryogenic fluid inside. Since it is a bayonet dry coupling in which the double nozzle body is deeply inserted into the double adapter body, heat conduction from the inner body exposed to the cryogenic fluid to the outer body via conductors can be minimized in the double nozzle body and adapter body structure.

[0028] Thirdly, the structure is designed to accommodate a bayonet hose for cryogenic use, with a hose nozzle insertion section on one side of the bayonet dry coupling nozzle and a bayonet seal sheet to maintain airtightness when fastened with the hose-side nozzle. This prevents heat loss in the hose and the hose nozzle insertion section.

[0029] Fourthly, since the bayonet dry coupling adapter has an adapter connection projection on one side to accommodate a bayonet female connector, the bayonet frame connector provided on the tank side for fastening the bayonet dry coupling adapter to the cryogenic tank can prevent heat loss at the adapter connection projection and the tank connection.

[0030] Fifth, conventional dry couplings, due to their operating structure, use nozzle disc push links, making it difficult to create a double-layered heat-insulating structure. Wear of the push links can cause malfunctions. However, the present invention is a slide fastening / separation method that does not have a push link acting as a handle in the nozzle section, making it applicable to a double-layered heat-insulating structure. Therefore, malfunctions due to wear can be prevented. [Brief explanation of the drawing]

[0031] [Figure 1] This is an illustrative diagram showing the structure and operating principle of a conventional dry coupling. [Figure 2]This is an illustrative diagram of a bayonet dry coupling nozzle according to the present invention. [Figure 3] This is an illustrative diagram of a bayonet dry coupling adapter according to the present invention. [Figure 4] (a) and (b) are illustrative diagrams of flow path blockage before complete engagement or during disengagement of the bayonet dry coupling according to the present invention. [Figure 5] (a) and (b) are illustrative diagrams illustrating the operating principle of the bayonet dry coupling according to the present invention. [Modes for carrying out the invention]

[0032] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings in order to fully understand the present invention. Embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments detailed below. It should be noted that in each drawing, the same components may be denoted by the same reference numerals. Detailed descriptions of known functions and components that are deemed to potentially obscure the gist of the present invention are omitted.

[0033] Referring to Figures 2 to 5, the present invention is a pair of male and female connectors for ultra-low temperature high-pressure gases, provided on the tank side and the hose side, comprising a bayonet dry coupling nozzle 100 fastened to the end of the hose side and a bayonet dry coupling adapter 200 fastened to the filling port or discharge port on the tank side.

[0034] In other words, the bayonet dry coupling nozzle 100 includes a double nozzle body 110 having a vacuum insulation layer 112, a hose nozzle insertion portion 120 provided on one side of the double nozzle body 110 and fastened to the hose end, an adapter connection projection 130 provided on the other side of the double nozzle body 110, and a first opening / closing disk unit 150 provided at the end of the adapter connection projection 130.

[0035] In this case, the double nozzle body 110 is configured to include a hollow tubular first inner body 114, a hollow tubular first outer body 116 disposed on the outer circumference of the first inner body 114, a first seal cap 118a connected to one end of the first inner body 114 and the first outer body 116 to seal while maintaining a gap for forming the first vacuum insulation layer 112, and a first seal tip 118b connected to one end of the first inner body 114 and the first outer body 116 to seal while maintaining a gap for forming the first vacuum insulation layer 112.

[0036] A ring-shaped rotating flange 142 is connected to the outer circumference of the first seal cap 118a via a guard ring 144, and a first seal O-ring 146 is provided on the outer side surface of the first seal cap 118a for sealing when the hose end is fastened to the hose nozzle insertion part 120.

[0037] The first open / close disk unit 150 comprises a first guide holder 154 provided on the first seal tip 118b via a ring-shaped disk sheet 152 and having a plurality of flow channels formed therein; an open / close disk 156 provided via an open / close disk shaft 156a that guides through the center of the first guide holder 154 and opens or closes the flow channels of the disk sheet 152; and a return spring 158 provided around the open / close disk shaft 156a between the first guide holder 154 and the open / close disk 156.

[0038] At this time, when the push pressure is released, the return spring 158 causes the opening / closing disc 156 to close the opening of the disc seat 152.

[0039] The first internal body 114 consists of a first inner large-diameter portion that forms the hose nozzle insertion portion 120 and a first inner small-diameter portion that forms the adapter connection projection 130.

[0040] At this time, the first inner large diameter portion and the first inner small diameter portion are joined together by a ring-shaped first internal seal sheet 140 around both of their contacting ends.

[0041] The first outer body 116 comprises a first outer large-diameter portion formed concentrically on the outer circumference of the first inner large-diameter portion, and a first outer small-diameter portion formed concentrically on the outer circumference of the first inner small-diameter portion.

[0042] At this time, the first outer large diameter portion and the first outer small diameter portion are joined together by a ring-shaped external sealing sheet 160 around both ends that are in contact with each other.

[0043] A nozzle cover 162 is provided on the outer circumference of the outer seal sheet 160, with a lock pin 162a formed on one side of its inner circumference that is attached to and detached from one side of the double adapter body 210. A nozzle handle 164 is provided on one side of the outer circumference of the nozzle cover 162.

[0044] On the other hand, the bayonet dry coupling adapter 200 includes a double adapter body 210 having a vacuum insulation layer 212, a nozzle insertion portion 220 provided on one side of the double adapter body 210 and fastened to an adapter connection projection 130, an adapter projection 230 provided on the other side of the double adapter body 210 and fastened to a filling port or discharge port on the tank side, and a second opening / closing disk unit 250 provided between the nozzle insertion portion 220 and the adapter projection 230, which pushes a first opening / closing disk unit 150 to open and close the flow path when the double nozzle body 110 and the double adapter body 210 are coupled.

[0045] In other words, the double adapter body 210 comprises a hollow tubular second inner body 214, a hollow tubular second outer body 216 disposed on the outer circumference of the second inner body 214, a second seal cap 218a coupled to one end of the second inner body 214 and the second outer body 216 to seal while maintaining a gap for forming the second vacuum insulation layer 212, and a second seal tip 218b coupled to one end of the second inner body 214 and the second outer body 216 to seal while maintaining a gap for forming the second vacuum insulation layer 212.

[0046] In this case, the second internal body 214 is composed of a second inner large-diameter portion that forms the nozzle insertion portion 220 and a second inner small-diameter portion that forms the adapter protrusion portion 230.

[0047] The second inner large-diameter portion and the second inner small-diameter portion are joined together by a ring-shaped second internal seal sheet 240 around both of their contacting ends.

[0048] The second external body 216 is composed of a second external large-diameter portion formed concentrically on the outer circumference of the second internal large-diameter portion, and a second external small-diameter portion formed concentrically on the outer circumference of the second internal small-diameter portion.

[0049] At this time, the second outer large diameter portion and the second outer small diameter portion are joined together by a ring-shaped flange 260 around both ends that are in contact with each other.

[0050] A lock groove 218a-1 is formed in the center of the outer circumference of the second seal cap 218a, which is attached to and detached from the lock pin 162a, and a seal 218b-1 is provided at the end of the outer circumference of the second seal tip 218b.

[0051] At this time, the double adapter body 210 has elasticity that allows for radial diffusion, enabling it to either push and insert the lock pin 162a into the lock groove 218a-1, or to separate the lock pin 162a from the lock groove 218a-1.

[0052] The second opening / closing disk unit 250 comprises a second guide holder 252 provided in front of the inner circumferential surface of the second internal seal sheet 240 and having a plurality of flow channels formed therein; an opening / closing ring disk 254 provided behind the inner circumferential surface of the second internal seal sheet 240 and having a plurality of flow channels formed therein; a push disk 256 provided in the center of the second guide holder 252 via a push disk shaft 254a; and a push spring 258 provided around the push disk shaft 256a between the second guide holder 252 and the opening / closing ring disk 254.

[0053] At this time, when the push pressure is released, the push spring 258 causes the push disk 156 to close the multiple passages of the opening / closing ring disk 254.

[0054] Due to a larger diameter difference than the push disc 256, the opening / closing disc 156 cannot move into the area of ​​the double adapter body 210, and the repulsive force of the return spring 158 causes it to adhere tightly to the opening edge of the disc sheet 152, closing the flow path of the double nozzle body 110, or the force pushing from the push disc 256 causes it to move away from the opening edge of the disc sheet 152, opening the flow path.

[0055] On the other hand, since the push disk 256 is smaller in diameter than the opening / closing disk 156, it moves away from the opening / closing ring disk 254 and moves to the area of ​​the double nozzle body 110 to open the flow path, or when it moves to the area of ​​the double adapter body 210, it engages with the opening / closing ring disk 254 and closes the flow path of the double adapter body 210.

[0056] In the ultra-low temperature high-pressure gas connector of the present invention configured as described above, when the bayonet dry coupling nozzle 100 and the bayonet dry coupling adapter 200 are separated, as shown in Figure 4A, the opening / closing disk 156 of the first opening / closing disk unit 150 is in close contact with the disk seat 152 by the return spring 158 to block the flow path, and the bayonet dry coupling adapter 200 maintains a constant flow path blockage state by having the opening / closing ring disk 254 of the second opening / closing disk unit 250 come into close contact with the opening / closing disk 156 and the push disk 256 by the push spring 258 to block the flow path.

[0057] When the nozzle handle 164 of the bayonet dry coupling nozzle 100 is grasped and the adapter connection projection 130 is pushed into the nozzle insertion portion 220 of the bayonet dry coupling adapter 200, the disc seat 152 and opening / closing disc 156 of the adapter connection projection 130 come into close contact with the opening / closing ring disc 254 and push disc 256 of the nozzle insertion portion 220.

[0058] Subsequently, in order to fully fasten the connection, the adapter connection projection 130 is pushed into the nozzle insertion portion 220 so that the lock pin 162a of the nozzle handle 164 on the bayonet dry coupling nozzle 100 side is inserted into the lock groove 218a-1 on the bayonet dry coupling adapter 200 side. As shown in Figure 5B, the opening / closing disk 156 of the first opening / closing disk unit 150 pushes the opening / closing ring disk 254 of the second opening / closing disk unit 250 backward, while the push disk 256 pushes the opening / closing disk 156 backward, thereby opening the flow path between the bayonet dry coupling nozzle 100 and the bayonet dry coupling adapter 200.

[0059] At this time, after separating the lock pin 162a from the lock groove 218a-1 using the nozzle handle 164, the bayonet dry coupling nozzle 100 is moved backward and separated from the bayonet dry coupling adapter 200. As shown in Figure 4B, the opening / closing disc 156 and the opening / closing ring disc 254 are brought into close contact with the disc seat 152 and the opening / closing ring disc 254, respectively, by the force of the compressed return springs 158 and push springs 258, thereby blocking the flow path.

[0060] On the other hand, the present invention is not limited to the embodiments described above, and can be implemented with modifications and variations without departing from the spirit of the invention. Such modified and transformed technical concepts should also be understood to fall within the scope of the following claims. [Explanation of Symbols]

[0061] 100: Bayonet dry coupling nozzle 110: Dual nozzle body 112: First vacuum insulation layer 114: First internal body 116: First external body 118a: First seal cap 118b: First seal tip 120: Hose nozzle insertion part 130: Adapter connection protrusion 140: First internal sealing sheet 142: Rotating flange 144: Guard Ring 146: First seal O-ring 150: First Opening / Closing Disk Unit 152: Disc Sheet 154: Guide holder 156: Open / Close Disk 156a: Opening / closing disk shaft 158: Return Spring 160: External sealing sheet 162: Nozzle cover 162a: Lock pin 164: Nozzle handle 166: Second seal O-ring 200: Bayonet Dry Coupling Adapter 210: Dual adapter body 212: Second vacuum insulation layer 214: Second internal body 216: Second external body 218a: Second seal cap 218a-1: Lock groove 218b: Second seal tip 218b-1: Seal 220: Nozzle insertion section 230: Adapter protrusion 240: Second internal sealing sheet 250: Second Opening / Closing Disk Unit 252: Guide holder 254: Opening / Closing Ring Disc 256: Push Disk 256a: Push disk shaft 258: Push spring 260: Flange

Claims

1. A pair of male and female connectors for ultra-low temperature, high-pressure gas, provided on the tank side and the hose side, A bayonet dry coupling nozzle 100 comprises a double nozzle body 110 having a vacuum insulation layer 112, a hose nozzle insertion portion 120 provided on one side of the double nozzle body 110 and fastened to the hose end, an adapter connection projection 130 provided on the other side of the double nozzle body 110, and a first opening / closing disc unit 150 provided at the end of the adapter connection projection 130, A connector for ultra-low temperature, high-pressure gas, comprising a bayonet dry coupling adapter 200 including a double adapter body 210 having a vacuum insulation layer 212, a nozzle insertion portion 220 provided on one side of the double adapter body 210 and fastened to the adapter connection projection 130, an adapter projection 230 provided on the other side of the double adapter body 210 and fastened to the filling port or discharge port on the tank side, and a second opening / closing disk unit 250 provided between the nozzle insertion portion 220 and the adapter projection 230, which pushes the first opening / closing disk unit 150 to open and close the flow path when the double nozzle body 110 and the double adapter body 210 are coupled.

2. The double nozzle body 110 is A hollow tubular first internal body 114, A hollow tubular first external body 116 is arranged on the outer circumference of the first internal body 114, A first seal cap 118a is coupled to one end of the first internal body 114 and the first external body 116, and seals while maintaining a gap for forming the first vacuum insulation layer 112, The ultra-low temperature high-pressure gas connector according to claim 1, further comprising: a first seal tip 118b coupled to one end of the first internal body 114 and the first external body 116, which seals while maintaining a gap for forming the first vacuum insulation layer 112.

3. A ring-shaped rotating flange 142 is connected to the outer circumference of the first seal cap 118a via a guard ring 144. The connector for ultra-low temperature high-pressure gas according to claim 2, characterized in that a first seal O-ring 146 for sealing is provided on the outer surface of the first seal cap 118a when the hose end is fastened to the hose nozzle insertion portion 120.

4. The first opening / closing disk unit 150 is The first seal tip 118b is provided with a ring-shaped disc sheet 152, and a first guide holder 154 having multiple flow channels formed therein, An opening / closing disk 156 is provided via an opening / closing disk shaft 156a that guides the first guide holder 154 to pass through the center, and opens or closes the flow path of the disk sheet 152, Between the first guide holder 154 and the opening / closing disk 156, a return spring 158 is provided around the opening / closing disk shaft 156a, The connector for ultra-low temperature high-pressure gas according to claim 2, characterized in that when the push pressure is released, the return spring 158 causes the opening / closing disc 156 to close the opening of the disc sheet 152.

5. The first internal body 114 is The first inner large diameter portion that forms the hose nozzle insertion portion 120, It consists of a first inner small diameter portion that forms the adapter connection protrusion 130, The connector for ultra-low temperature high-pressure gas according to claim 4, characterized in that the first inner large-diameter portion and the first inner small-diameter portion are joined together by a ring-shaped first internal seal sheet 140 around both ends that are in contact with each other.

6. The first external body 116 is, A first outer large diameter portion is formed to be concentrically arranged on the outer circumference of the first inner large diameter portion, It consists of a first outer small diameter portion formed concentrically on the outer circumference of the first inner small diameter portion, The connector for ultra-low temperature high-pressure gas according to claim 5, characterized in that the first outer large-diameter portion and the first outer small-diameter portion are joined together by a ring-shaped external sealing sheet 160 around both ends that are in contact with each other.

7. A nozzle cover 162 is provided on the outer circumference of the outer seal sheet 160, with a lock pin 162a formed on one side of the inner circumference that is attached to and detached from one side of the double adapter body 210. The connector for ultra-low temperature high-pressure gas according to claim 6, characterized in that a nozzle handle 164 is provided on one side of the outer circumference of the nozzle cover 162.

8. The double adapter body 210 is A hollow tubular second internal body 214, A hollow tubular second external body 216 is arranged on the outer circumference of the second internal body 214, A second seal cap 218a is coupled to one end of the second inner body 214 and the second outer body 216, and seals while maintaining a gap for forming the second vacuum insulation layer 212, The ultra-low temperature high-pressure gas connector according to claim 7, further comprising a second seal tip 218b coupled to one end of the second internal body 214 and the second external body 216, which seals while maintaining a gap for forming the second vacuum insulation layer 212.

9. The second internal body 214 is The second inner large diameter portion that forms the nozzle insertion portion 220, It consists of a second inner small diameter portion that forms the adapter protrusion 230, The connector for ultra-low temperature high-pressure gas according to claim 8, characterized in that the second inner large-diameter portion and the second inner small-diameter portion are joined together by a ring-shaped second internal sealing sheet 240 around both ends that are in contact with each other.

10. The second external body 216 is, A second outer large diameter portion is formed to be concentrically arranged on the outer circumference of the second inner large diameter portion, It consists of a second outer small diameter portion formed concentrically on the outer circumference of the second inner small diameter portion, The connector for ultra-low temperature high-pressure gas according to claim 9, characterized in that the second outer large-diameter portion and the second outer small-diameter portion are joined around their respective ends by a ring-shaped flange 260.

11. A lock groove 218a-1 is formed in the center of the outer circumference of the second seal cap 218a, which is attached to and detached from the lock pin 162a. The connector for ultra-low temperature high-pressure gas according to claim 8, characterized in that a seal 218b-1 is provided at the outer end of the second seal tip 218b.

12. The second opening / closing disk unit 250 is, A second guide holder 252 is provided in front of the inner circumferential surface of the second internal seal sheet 240 and has a plurality of flow channels formed therein, An opening / closing ring disc 254 is provided behind the inner circumferential surface of the second internal seal sheet 240, and has a plurality of flow channels formed therein. A push disk 256 is provided in the center of the second guide holder 252 via a push disk shaft 254a, Between the second guide holder 252 and the opening / closing ring disc 254, a push spring 258 is provided around the push disc shaft 256a, The connector for ultra-low temperature high-pressure gas according to claim 9, characterized in that when the push pressure is released, the push disk 156 closes a plurality of passages in the opening / closing ring disk 254.

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