Quick connectors for ultra-low temperature vacuum piping

Abstract

This quick connector for ultra-low temperature vacuum piping not only allows for the miniaturization of the applicable equipment, can be used universally in a variety of highly integrated devices, ensures sealing performance regardless of the type of coolant, and has excellent heat insulation regardless of the vaporization rate of the medium used. [Solution] The present invention provides a quick connector for ultra-low temperature vacuum piping, comprising: a male connector having a connecting pipe along a center line; a female connector having a connecting pipe along a center line and coupled to the male connector; a pipe coupling means configured to connect the connecting pipe of the male connector and the connecting pipe of the female connector; and a heat conduction path forming means provided inside the male connector and the female connector, respectively, which is configured to form a multilayer heat conduction path in a direction perpendicular to the connecting pipe, with a portion of it in contact with each other.

Description

【Technical Field】 【0001】 The present invention relates to a quick connector for ultra-low temperature vacuum pipes. More specifically, it can reliably prevent icing and condensation of the connection part of the quick connector in a low-temperature shrinkage environment, and can secure a sufficient heat conduction path while relatively shortening the length of the connector. Therefore, not only can the applied device be made more compact, but it can be widely used in various high-integration devices that adopt it. Furthermore, regardless of the type of coolant, it can ensure sealing performance and has an excellent heat insulation effect regardless of the vaporization rate of the used medium. The present invention relates to a quick connector for ultra-low temperature vacuum pipes. 【Background Art】 【0002】 Quick connectors (also known as quick couplers) are well-known in the art and generally include a female part designed to cooperate with the end of a pipe (the end of a male-type mating pipe). 【0003】 Such quick connectors are configured so that two pipes in a cooling circuit are coupled to each other to form a secure mating structure, and thus the two pipes are fixed by the connector to form a sealed joint. 【0004】 Such quick connectors are widely used to connect gas lines, hydraulic pipes, and components of cooling circuits. Quick connectors use a so-called push fitting arrangement in which the user pushes a male part (usually formed at the end of a pipe) into a female counterpart within the connector, and the male and female parts are completely joined by being fastened together. 【0005】 The configuration of a prior art quick connector and related problems will be described with reference to FIG. 1. FIG. 1 is a view showing a prior art quick connector, which shows a perspective view and a cross-sectional view together for understanding the configuration. 【0006】 Conventional quick connectors, as shown in Figure 1, have long heat conduction paths to prevent freezing and condensation at the connection point. Consequently, the connectors are manufactured to be very long, which limits their use in environments requiring high integration. 【0007】 Furthermore, conventional quick connectors have a structure that prevents perfect sealing of the sealing area, resulting in separation of the sealing area due to low-temperature shrinkage, and they cannot provide perfect sealing to fluids in high-pressure environments. For these reasons, they are limited to being used with the coupling direction perpendicular to the surface. 【0008】 Furthermore, conventional quick connectors are connected to vacuum piping, and a vacuum is maintained between the outer sheath (casing) and the piping through which the fluid passes. However, the short distance between the piping through which the low-temperature fluid passes and the external piping causes ice formation, which creates a direct heat conduction path and leads to condensation on the outside. 【0009】 Furthermore, conventional quick connectors have problems in terms of manufacturability and cost-effectiveness because, in order to form a vacuum independently of the outer sheath (casing), if welding is performed directly on the piping through which the low-temperature fluid passes, the welded joint becomes a heat conduction path, causing ice or condensation to form on the outer sheath, and there is no means to form a vacuum inside, so a port must be provided on the outside to form a vacuum. 【0010】 Furthermore, conventional quick connectors utilize a technology where the sealing portion expands due to low-temperature contraction, causing fluid to leak out. This leaked fluid then vaporizes, preventing further fluid leakage through pressure equalization. However, this technology has drawbacks, such as being unsuitable for certain types of internal fluids, including coolants that do not easily vaporize, and also suffers from reduced thermal insulation due to internal convection. [Prior art documents] [Patent Documents] 【0011】 [Patent Document 1] Korean Registered Patent Publication No. 10-0929152 [Patent Document 2] Korean Registered Patent Publication No. 10-1378916 [Patent Document 3] Korean Published Patent No. 10-2006-0059009 [Patent Document 4] Korean Public Utility Model Publication No. 20-2018-0003206 [Overview of the Initiative] [Problems that the invention aims to solve] 【0012】 Therefore, the present invention, which solves the above-mentioned conventional problems, aims to provide a quick connector for ultra-low temperature vacuum piping that can reliably prevent freezing and condensation at the connection part of the quick connector in a low-temperature shrinkage environment, and can secure a sufficient heat conduction path while relatively shortening the length of the connector, thereby enabling the compactness of the applicable device and allowing it to be used universally in a variety of highly integrated devices. 【0013】 Furthermore, the present invention also aims to provide a quick connector for ultra-low temperature vacuum piping that can ensure sealing performance regardless of the type of coolant and has excellent heat insulation regardless of the vaporization rate of the medium used. 【0014】 The problems to be solved by this invention are not limited to those mentioned above, and other problems not mentioned will be clearly understandable to those skilled in the art from the following description. [Means for solving the problem] 【0015】 According to one aspect of the present invention for achieving the above-described objectives and other features of the present invention, a quick connector for ultra-low temperature vacuum piping is provided, comprising: a male connector having a connecting pipe along a center line; a female connector having a connecting pipe along a center line and coupled to the male connector; a pipe coupling means configured to couple the connecting pipe of the male connector and the connecting pipe of the female connector; and a heat conduction path forming means provided inside the male connector and the female connector, respectively, which is configured to form a multilayer heat conduction path in a direction perpendicular to the connecting pipe, with a portion of the path in contact with each other. 【0016】 In the present invention, the male connector and the female connector include a casing, a coupling cover member provided at one end of the casing, and a fastening flange provided at the other end of the casing, wherein the coupling cover member includes a flange portion at one end which is coupled to the casing, a bellows portion at one end which is coupled to the other end of the flange portion, and a finishing cap portion coupled to the other end of the bellows portion and having a pipe penetration opening in its center, and the coupling cover member and the connecting pipe may be constructed by vacuum brazing. 【0017】 In the present invention, the pipe coupling means may include a first coupling member provided at the other end of the connecting pipe of the male connector, a second coupling member provided at one end of the connecting pipe of the female connector, a third coupling member coupled to the outside of the overlapping portion of the first coupling member and the second coupling member in a state where the ends of the first coupling member and the ends of the second coupling member overlap radially, and one or more sealing members provided on the coupling surfaces of at least two coupling members among the first coupling member, the second coupling member and the third coupling member. 【0018】 In the present invention, the first coupling member has a fitting projection that fits into the space formed between the heat conduction path forming means and the connecting pipe of the male connector, and each of the first coupling member and the second coupling member may be configured to be stepped-coupled to the end of the connecting pipe. 【0019】 In the present invention, the sealing member may include a first sealing member provided on a joint surface between the first coupling member and the third coupling member, and a second sealing member provided on a joint surface between the first coupling member, the second coupling member, and the third coupling member. 【0020】 In the present invention, the second sealing member is provided between an outer surface of the first coupling member, an end of the second coupling member, and a lower surface of the third coupling member, and the second sealing member may be formed in a cross-shaped cross-section or an X-shaped cross-section, or may be formed in a ring shape having a concave groove portion on an outer surface. 【0021】 In the present invention, wedge-shaped protrusions are formed on respective joint surfaces of the first coupling member and the second coupling member in a portion where the second sealing member is provided, and the wedge-shaped protrusions may be formed to correspond to a concave groove portion on an outer surface of the second sealing member. 【0022】 In the present invention, the heat conduction path forming means includes a first heat conduction path member provided on the male connector and configured to form a zigzag heat conduction path, and a second heat conduction path member provided on the female connector and configured to form a zigzag heat conduction path. The first heat conduction path member and the second heat conduction path member are formed of a tubular body having a cross-section in one of the shapes of " JPEG2026096919000002.jpg47", " JPEG2026096919000003.jpg39", or " JPEG2026096919000004.jpg58". 【0023】 In the present invention, one of the first heat conduction path member and the second heat conduction path member may be configured to extend to a side where the other one is provided and be partially in contact with the other one. 【0024】 In the present invention, it further includes a third sealing member provided at the contact portion between the first heat conduction path member and the second heat conduction path member, and the third sealing member can block the connection between the spaces separated on the upper and lower sides with respect to the contact surface between the first heat conduction path member and the second heat conduction path member and separate the spaces from each other. 【Advantages of the Invention】 【0025】 According to the quick connector for ultra-low temperature vacuum piping according to the present invention, the following effects are provided. 【0026】 First, the present invention can relatively shorten the length of the connector to make the application device more compact and ensure a sufficient heat conduction path, so it can be widely used in various high-integration devices that adopt it. 【0027】 Second, the present invention can maintain the fluid sealing ability even when the connector is used horizontally, has perfect sealing ability even in an environment where high-pressure fluid is used, and can design the elastic setting in view of low-temperature shrinkage. Therefore, it can ensure the airtightness maintaining ability even in an extremely low-temperature state and effectively prevent icing and condensation at the connection part of the quick connector. 【0028】 Third, the present invention has the effect that the transfer fluid pipeline does not directly contact the outermost casing, and the formation of multiple pockets does not cause icing and condensation on the casing. 【0029】 Fourth, the present invention can permanently maintain the internal vacuum of the connector, permanently get rid of cracks caused by shrinkage and expansion at low temperature / normal temperature, and has a very high vacuum formation and can maximize the heat insulation effect. 【0030】 Fifth, the present invention can provide a connector that can be used independently without the need to use low-temperature dedicated piping, so it can improve the economy and further increase the versatility. 【0031】 Sixth, the present invention can ensure sealing performance regardless of the type of coolant, has excellent heat insulation regardless of the vaporization rate of the medium used, and can further maximize the heat insulation effect by suppressing internal convection phenomena through the separation of the inner and outer spaces inside the quick connector, thereby improving the reliability of the device. 【0032】 The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understandable to those skilled in the art from the following description. [Brief explanation of the drawing] 【0033】 [Figure 1] This diagram shows a quick connector using conventional technology, with both a perspective view and a cross-sectional view shown together to facilitate understanding of its structure. [Figure 2] This is a perspective view showing a quick connector for ultra-low temperature vacuum piping according to the present invention. [Figure 3] This is a cross-sectional view showing a part (upper half) of the quick connector for ultra-low temperature vacuum piping according to the present invention. [Figure 4] This is a cross-sectional view showing the male and female connectors included in the quick connector for ultra-low temperature vacuum piping according to the present invention, separated from each other. [Figure 5] Figure 3 shows an enlarged view of section "A," illustrating the connection points of the male and female connectors of the ultra-low temperature vacuum piping quick connector according to the present invention. [Figure 6] This is an enlarged view showing section "A" of Figure 3 separated. [Figure 7] This is a diagram illustrating the internal space layer separation section of the quick connector for ultra-low temperature vacuum piping according to the present invention. [Figure 8] This is a diagram illustrating the permanent vacuum forming portion of a quick connector for ultra-low temperature vacuum piping according to the present invention. [Figure 9] This figure shows (multiple) embodiments of the heat transfer reduction means included in the quick connector for ultra-low temperature vacuum piping according to the present invention. [Figure 10]This is an experimental photograph showing temperature measurements taken at multiple locations on a fabricated quick connector for ultra-low temperature vacuum piping according to the present invention. [Modes for carrying out the invention] 【0034】 Additional objectives, features, and advantages of the present invention can be better understood from the following detailed description and accompanying drawings. 【0035】 Prior to a detailed description of the present invention, it should be noted that the present invention can be modified in various ways and may have many different embodiments. Therefore, the examples described below and shown in the drawings are not intended to limit the present invention to any particular embodiment, but should be understood to include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the present invention. 【0036】 When one component is referred to as being "linked" or "connected" to another component, it should be understood that it may be directly linked or connected to the other component, but there may also be other components in between. On the other hand, when one component is referred to as being "directly linked" or "directly connected" to another component, it should be understood that there are no other components in between. 【0037】 The terms used herein are solely for the purpose of describing specific embodiments and are not intended to limit the invention. A singular expression includes plural expressions unless explicitly indicated otherwise in the context. In this specification, terms such as “includes” or “having” are intended to specify the presence of features, figures, stages, operations, components, parts, or combinations thereof as described in the specification, and should not be understood to preemptively exclude the possibility of the presence or addition of one or more other features, figures, stages, operations, components, parts, or combinations thereof. 【0038】 Furthermore, terms such as "...part," "...unit," and "...module" as described in the specification refer to a unit that processes at least one function or operation, which can be embodied by hardware, software, or a combination of hardware and software. 【0039】 Furthermore, when explaining with reference to the attached drawings, the same reference numerals will be assigned to the same components regardless of the reference numerals in the drawings, and redundant explanations will be omitted. In the description of the present invention, if it is determined that a specific explanation of related known technology may unnecessarily obscure the gist of the present invention, such detailed explanation will be omitted. 【0040】 Hereinafter, a preferred embodiment of the present invention, a quick connector for cryogenic vacuum piping, will be described in detail with reference to the accompanying drawings. 【0041】 Figure 2 is a perspective view showing the quick connector for ultra-low temperature vacuum piping according to the present invention, Figure 3 is a cross-sectional view showing a part (upper half) of the quick connector for ultra-low temperature vacuum piping according to the present invention, Figure 4 is a cross-sectional view showing the male connector and female connector included in the quick connector for ultra-low temperature vacuum piping according to the present invention separated. Figure 5 is an enlarged view of part "A" in Figure 3, showing the connection part of the male connector and female connector of the quick connector for ultra-low temperature vacuum piping according to the present invention, and Figure 6 is an enlarged view showing part "A" in Figure 3 separated. Figure 7 is a diagram for explaining the space layer separation part inside the quick connector for ultra-low temperature vacuum piping according to the present invention, Figure 8 is a diagram for explaining the permanent vacuum forming part of the quick connector for ultra-low temperature vacuum piping according to the present invention, Figure 9 is a diagram showing (multiple) embodiments of the heat transfer reduction means included in the quick connector for ultra-low temperature vacuum piping according to the present invention, and Figure 10 is an experimental photograph showing temperature measurements at multiple locations on a manufactured product of the quick connector for ultra-low temperature vacuum piping according to the present invention. 【0042】 The quick connector for ultra-low temperature vacuum piping according to the present invention, as shown in Figures 2 to 10, broadly includes a male connector 100, a female connector 200, a piping coupling means 300, a heat conduction path forming means 400, and a clamping means 500. 【0043】 Specifically, as shown in Figures 2 to 10, the quick connector for ultra-low temperature vacuum piping according to the present invention includes a male connector 100 having a connecting pipe (male connecting pipe) 101 on its longitudinal central axis, a female connector 200 having a connecting pipe (female connecting pipe) 201 on its longitudinal central axis and coupled to the male connector 100 via the following coupling means (pipe coupling means) 300, coupling means (pipe coupling means) 300 configured to connect the connecting pipe 101 of the male connector 100 and the connecting pipe 201 of the female connector 200, heat conduction path forming means 400 provided inside the male connector 100 and the female connector 200 respectively and configured to form a multi-layered heat conduction path in the radial direction (direction perpendicular to the connecting pipe), and clamping means 500 configured to bundle and connect the male connector 100 and the female connector 200. Furthermore, the cryogenic vacuum piping quick connector of the present invention may further include one or more heat transfer reduction means 600 provided on the axis of the connecting pipe 101 of the male connector 100 and the connecting pipe 201 of the female connector 200, and configured to reduce heat transfer inside the male connector 100 and the female connector 200, respectively. 【0044】 The male connector 100 is a component in which a connecting pipe (male connecting pipe) 101 is connected to the female connecting pipe 201 of the female connector 200 via a pipe connecting means 300 on the longitudinal central axis, and is bundled and connected to the female connector 200 via a clamping means 500, and includes a heat conduction path forming means 400 which will be described in detail below. 【0045】 Specifically, the male connector 100 includes a cylindrical casing 110, a coupling cover member 120 provided at one end of the casing 110 (the end opposite to the direction in which it is coupled to the female connector, or the left end in the drawing), a fastening flange 130 provided at the other end of the casing 110, with an outer diameter larger than the diameter of the casing 110, and a connecting pipe 101 provided on the longitudinal central axis of the casing 110, with both ends exposed to the outside of the casing 110. 【0046】 The coupling cover member 120 includes a flange portion 121 at one end which is coupled (vacuum brazed) to the casing 110, a bellows portion 122 at one end which is coupled (vacuum brazed) to the other end of the flange portion 121, and a finishing cap portion 123 coupled to the other end of the bellows portion 122, with a pipe penetration opening formed in the center. 【0047】 The bellows portion 122 is made of a thin metal body. 【0048】 In the present invention, the coupling cover member 120 is equipped with a thin bellows portion 122, which makes the heat conduction path long and thin in the part that is in direct contact with the low-temperature fluid piping and in a narrow space, thereby minimizing heat conduction and limiting the freezing of the outer covering to a short section. 【0049】 Furthermore, in this invention, the coupling cover member 120 can be joined by using vacuum brazing to create an ultra-high vacuum in the internal space, thereby preventing heat conduction due to internal convection and eliminating the need for an external vacuum port. In other words, by using the bellows portion 122 at the connection point between the outside and inside of the connector (i.e., the assembly portion, not the fastening portion), heat conduction can be minimized. 【0050】 This invention minimizes heat transfer by convection by manufacturing male connectors 100 and female connectors 200 using a vacuum brazing method to ensure a permanent vacuum state. In other words, this invention maintains a permanent internal vacuum in the connectors by manufacturing them using vacuum brazing, preventing cracks caused by contraction and expansion at low and normal temperatures, and maximizing the heat insulation effect due to its extremely high vacuum formation performance (see Figure 8). In Figure 8, the dark gray shaded area shows the permanent vacuum-formed area of ​​the quick connector, which is also symmetrically formed on the lower side, although not shown. 【0051】 Next, the female connector 200 is a component that includes a connecting pipe 201 on its longitudinal central axis, which is airtightly coupled to the connecting pipe 101 of the male connector 100 via the pipe coupling means 300, and is coupled to one end of the male connector 100 via the clamping means 500, and includes a heat conduction path forming means 400 which will be described in detail below. 【0052】 Specifically, the female connector 200 includes a cylindrical casing 210, a coupling cover member 220 provided at the other end of the casing 210 (the end opposite to the direction in which it is coupled with the male connector, or the right end in the drawing), a fastening flange 230 provided at one end of the casing 210 and having an outer diameter larger than the diameter of the casing 210, and a connecting pipe 201 provided on the longitudinal central axis of the casing 210, with the other end exposed to the outside of the casing 210. 【0053】 The female connector 200 also includes a coupling cover member 220 similar to the coupling cover member 120 of the male connector 100. 【0054】 Specifically, the coupling cover member 220 includes a flange portion 221 at one end which is joined (vacuum brazed) to the casing 110, a bellows portion 222 at one end which is joined (vacuum brazed) to the other end of the flange portion 221, and a finishing cap portion 223 which is joined to the other end of the bellows portion 222 and has a pipe penetration opening in its center. 【0055】 Next, the pipe coupling means 300 is a component provided at the other end of the connecting pipe 101 of the male connector 100 and at one end of the connecting pipe 201 of the female connector 200, and is configured to airtightly connect both connecting pipes 101 and 201. 【0056】 The pipe coupling means 300 includes a first coupling member 310 provided at the other end of the connecting pipe 101 of the male connector 100, a second coupling member 320 provided at one end of the connecting pipe 201 of the female connector 200, a third coupling member 330 coupled to the outside of the overlapping portion of the first coupling member 310 and the second coupling member 320 when the ends of the first coupling member 310 and the second coupling member 320 overlap, and one or more sealing members 340, 350 provided on the coupling surfaces between the first coupling member 310, the second coupling member 320, and the third coupling member 330. 【0057】 The first connecting member 310 may be formed in a cylindrical shape and have a plurality of stepped portions on its outer surface. 【0058】 Specifically, the first connecting member 310 includes a cylindrical body portion 311 and a flange portion 312 formed at one end of the body portion 311 and extending outward. 【0059】 Preferably, the body portion 311 is formed such that its outer surface has two or more stepped sections. In other words, the body portion 311 has stepped sections that gradually decrease from the flange portion 312 towards the other end. 【0060】 Furthermore, the first connecting member 310 has a mounting portion formed on its radially outward-facing outer surface, which includes a mounting groove into which the sealing members 340 and 350 are attached. As will be explained below, a wedge-shaped projection is formed on a predetermined mounting portion to tightly adhere to the sealing members 340 and 350 of a predetermined shape, and this will be explained in detail below. 【0061】 Furthermore, a fitting projection 313 is formed on the rear surface of the flange portion 312 of the first coupling member 310 (the surface opposite to the direction toward the female connector), which fits into the space formed between the heat conduction path forming means 400 and the male connecting pipe 101, as described below. 【0062】 The second coupling member 320 is attached to the end of the connecting pipe 201 of the female connector 200 and includes an extension 321 at one end that extends toward the male connector 100, and this extension 321 is formed as a tubular body configured to radially overlap one end (the end on the smaller diameter side) of the first coupling member 310. 【0063】 In the present invention, the lower surface of one end of the second connecting member 320 is connected to the end of the female connecting pipe 201 in a stepped manner, and the upper surface is connected to the end of the heat conduction path forming means 400, which will be described below, in a stepped manner. 【0064】 The third connecting member 330 is formed as a tubular body that is attached to the outside of the overlapping portion of the first connecting member 310 and the second connecting member 320, with the end of the first connecting member 310 and the end of the second connecting member 320 overlapping. 【0065】 Next, the sealing members 340 and 350 are components provided on the joint surfaces between the first connecting member 310, the second connecting member 320, and the third connecting member 330. 【0066】 In the present invention, the sealing members 340 and 350 include a first sealing member 340 configured to seal the joint surface between the first connecting member 310 and the third connecting member 330, and a second sealing member 350 configured to seal the joint surfaces between the first connecting member 310, the second connecting member 320, and the third connecting member 330. 【0067】 The first sealing member 340 is provided in the mounting portion of the mounting groove formed on the radial outer surface of the first connecting member 310, and is made of a material that is flexible and durable. 【0068】 The second sealing member 350 is provided between the radial outer surface of the first connecting member 310, the end of the extension 321 of the second connecting member 320, and the lower surface of the third connecting member 330, and is made of a material that is flexible and durable. 【0069】 In the present invention, it is preferable that the second sealing member 350 has a cross-section that is shaped like a "cross" or an "X" or that is shaped like a ring with a groove on its outer surface, as shown in Figures 6 and 7. 【0070】 Here, as shown in Figure 7, wedge-shaped projections 360 are formed on the respective joining surfaces of the first connecting member 310 and the second connecting member 320 in the portion where the second sealing member 350 is interposed. The wedge-shaped projections 360 are formed to correspond to the recessed grooves on the outer surface of the second sealing member 350, and the wedge-shaped projections 360 are fitted into the groove side of the "X"-shaped second sealing member 350 interposed between the respective joining surfaces of the first connecting member 310 and the second connecting member 320. 【0071】 As shown in Figure 6, when pressure is applied in the direction "A" by the fluid, the second sealing member 350 and the wedge-shaped projection 360, configured in this way, are compressed in the direction "A" and pushed in the direction "B", so that they are tightly fitted in both the "A" and "B" directions, thereby ensuring a more reliable seal. 【0072】 In other words, the quick connector of the present invention having the sealing structure described above has perfect sealing capability even in environments using high-pressure fluids, and can maintain its fluid sealing capability even when the device is used horizontally. 【0073】 The wedge-shaped projection 360 may also be formed on the lower surface of the third connecting member 330. 【0074】 Next, the heat conduction path forming means 400 is provided inside the male connector 100 and the female connector 200, and is configured to form a multi-layered heat conduction path in the radial direction (a direction perpendicular to the connecting pipe). 【0075】 Specifically, the heat conduction path forming means 400 includes a male connector heat conduction path member (or first heat conduction path member) 410 configured to form a zigzag-shaped heat conduction path in the space between the outside of the connecting pipe 101 of the male connector 100 and the inside of the casing 110, and a female connector heat conduction path member (or second heat conduction path member) 420 configured to form a zigzag-shaped heat conduction path in the space between the outside of the connecting pipe 201 of the female connector 200 and the inside of the casing 210. 【0076】 In the present invention, the first heat conduction path member 410 and the second heat conduction path member 420 have a cross-section that is JPEG2026096919000005.jpg47" glyph, " JPEG2026096919000006.jpg310" character shape, or " It is formed from a tubular body that takes on one of the shapes of "JPEG2026096919000007.jpg58". 【0077】 The first heat conduction path member 410 and the second heat conduction path member 420, configured in this manner, have a slight elasticity, and therefore can prevent detachment at the sealing portion even if low-temperature shrinkage occurs. 【0078】 In other words, the quick connector of the present invention can be designed with elasticity settings that take shrinkage into consideration, and can ensure airtightness even in cryogenic conditions (various low-temperature shrinkage environments). 【0079】 Furthermore, in the present invention, one of the first heat conduction path member 410 and the second heat conduction path member 420 is formed to protrude outward from the casings 110 and 120 by a predetermined length, and the other of the first heat conduction path member 410 and the second heat conduction path member 420 is formed inside the casings 110 and 120, with a length shorter than the protrusion length of the other. 【0080】 The drawing shows a case where the first heat conduction path member 410 provided on the male connector 100 protrudes to the outside of the casing 110, and the second heat conduction path member 420 provided on the female connector 200 is configured inside the casing 210. 【0081】 In the present invention, when the male connector 100 and the female connector 200 are connected, the first heat conduction path member 410 and the second heat conduction path member 420 are formed in the cross-sectional shape described above. As shown in Figure 7, the convection space is partitioned (divided) in the male connector 100 and the female connector 200, and in each case, the spaces of the heat conduction path members 410 and 420 communicate with the internal spaces of the casings 110 and 210. 【0082】 Here, the upper and lower sides of the contact surface between the first heat conduction path member 410 and the second heat conduction path member 420 form a closed space, but these closed spaces communicate with each other through the fine gaps in the contact surface. The present invention further includes a third sealing member 430 on the contact surface between the first heat conduction path member 410 and the second heat conduction path member 420. 【0083】 Therefore, the present invention further separates the space layer by providing a third sealing member 430 on the contact surface between the first heat conduction path member 410 and the second heat conduction path member 420, thereby preventing a decrease in the heat conduction effect due to convection facing the internal piping and convection facing the external piping, and maximizing the heat retention effect by blocking the intermediate space. 【0084】 In other words, the third sealing member provided at the contact portion between the first heat conduction path member and the second heat conduction path member blocks the connection between the spaces separated above and below the contact surface between the first heat conduction path member and the second heat conduction path member, thereby maximizing the heat retention effect. 【0085】 Next, the clamping means 500 is a component configured to fasten and connect the male connector 100 and the female connector 200 together. It is not limited to the configuration illustrated in the drawings, but any configuration that can fasten and connect the male connector 100 and the female connector 200 together is acceptable, and known configurations can be adopted. 【0086】 On the other hand, the cryogenic vacuum piping quick connector of the present invention may further include one or more heat transfer reduction means 600 provided on the axis of the connecting pipe 101 of the male connector 100 and the connecting pipe 201 of the female connector 200, and configured to reduce heat transfer inside the male connector 100 and the female connector 200, respectively. 【0087】 As shown in Figure 10, the heat transfer reduction means 600 is fixed to the outer surface of the connecting pipes 101 and 201 and is formed of a ring-shaped member (or cryo trap member) made of a metallic material with excellent thermal conductivity. 【0088】 The heat transfer reduction means 600, which is composed of such a ring-shaped member, is provided at both ends of the connecting pipes 101 and 201 and at the parts fastened by the clamping means 500, and is preferably processed to have a rough surface. 【0089】 Such heat transfer reduction means 600 collects moisture and molecules below their condensation temperature inside the connector space to form a weak vacuum, and the formed vacuum reduces convective heat transfer and improves thermal insulation. 【0090】 On the other hand, as shown in Figure 10, the inventors of the present invention manufactured a quick connector for ultra-low temperature vacuum piping according to the present invention and measured the temperature at multiple locations while flowing an ultra-low temperature fluid, confirming that the measured temperature was within the margin of error. 【0091】 As described above, the quick connector for ultra-low temperature vacuum piping according to the present invention has the advantage of being able to shorten the length of the connector relatively, thereby making the applicable device more compact, while also ensuring a sufficient heat conduction path. Therefore, it can be used universally in a variety of highly integrated devices that employ it, it can maintain fluid sealing capability even when the quick connector is used horizontally, it can maintain perfect sealing capability even in environments using high-pressure fluids, and it is possible to design the elastic setting in consideration of low-temperature shrinkage, so that it can ensure airtightness even in extremely low temperature conditions and reliably prevent freezing and condensation at the connection part of the quick connector. 【0092】 Furthermore, the present invention has the advantages of preventing the transfer fluid pipeline from directly contacting the outermost casing, preventing ice formation and condensation on the casing through the formation of multiple pockets, permanently maintaining an internal vacuum in the connector, permanently protecting against cracks caused by contraction and expansion at low / room temperatures, and maximizing the heat insulation effect due to its extremely high vacuum formation performance. 【0093】 Furthermore, the present invention provides a connector that can be used independently without the need for piping specifically for low temperatures, thereby improving economic efficiency and versatility. It also ensures sealing performance regardless of the type of coolant, has excellent heat insulation regardless of the vaporization rate of the medium used, and maximizes the heat insulation effect by suppressing internal convection phenomena through spatial separation of the inner and outer parts within the quick connector, thus improving the reliability of the device. 【0094】 The embodiments described herein and the accompanying drawings are merely illustrative examples illustrating a part of the technical idea contained in the present invention. Therefore, it is clear that the embodiments disclosed herein are for illustrative purposes only and not to limit the technical idea of ​​the present invention, and thus the scope of the technical idea of ​​the present invention is not limited by such embodiments. Any modifications and specific embodiments that can be easily inferred by a person skilled in the art within the scope of the technical idea contained in the specification and drawings of the present invention should be interpreted as being within the scope of the rights of the present invention. [Explanation of Symbols] 【0095】 100 Male Connectors 101, 201 connecting pipes 110, 210 casing 120, 220 Connecting cover member 121, 221 Flange section 122, 222 bellows portion 123, 223 Finishing cap section 130, 230 fastening flange 200 Female Connectors 300 Piping connection means 310 First connecting member 311 Body part 312 Flange section 313 Fitting protrusion 320 Second connecting member 321 Extension 330 Third connecting member 340 First sealing member 350 Second sealing member 430 Third sealing member 360 Cuneiform process 400 Heat conduction path forming means 410 Male connector heat conduction path member (or first heat conduction path member) 420 Female connector heat conduction path member (or second heat conduction path member) 500 clamping means 600 Heat transfer reduction means

Claims

[Claim 1] A male connector equipped with connecting piping along the center line, A female connector is provided along the center line, and is coupled to the male connector, A pipe coupling means configured to connect the male connector's connecting pipe and the female connector's connecting pipe, A quick connector for ultra-low temperature vacuum piping, comprising: a heat conduction path forming means provided inside each of the male and female connectors, configured to form a multilayer heat conduction path perpendicular to the connecting piping, with a portion of the path in contact with each other. [Claim 2] The male connector and the female connector each include a casing, a coupling cover member provided at one end of the casing, and a fastening flange provided at the other end of the casing. The coupling cover member includes a flange portion, one end of which is coupled to the casing; a bellows portion, one end of which is coupled to the other end of the flange portion; and a finishing cap portion, which is coupled to the other end of the bellows portion and has a pipe penetration opening in its center. The quick connector for ultra-low temperature vacuum piping according to claim 1, characterized in that the coupling cover member and the connecting pipe are formed by vacuum brazing. [Claim 3] The aforementioned pipe coupling means is A first coupling member is provided at the other end of the connecting pipe of the male connector, A second coupling member is provided at one end of the connecting pipe of the female connector, A third connecting member is coupled to the outside of the overlapping portion of the first and second connecting members in a state where the ends of the first connecting member and the ends of the second connecting member overlap radially, The quick connector for ultra-low temperature vacuum piping according to claim 1, further comprising one or more sealing members provided on the coupling surfaces of at least two coupling members among the first coupling member, the second coupling member, and the third coupling member. [Claim 4] The first coupling member has a fitting projection that fits into the space formed between the heat conduction path forming means and the connecting pipe of the male connector, The quick connector for ultra-low temperature vacuum piping according to claim 3, characterized in that each of the first coupling member and the second coupling member is configured to be coupled in a stepped manner to the end of the connecting pipe. [Claim 5] The sealing member is A first sealing member provided on the joint surface between the first connecting member and the third connecting member, The quick connector for ultra-low temperature vacuum piping according to claim 3, further comprising a second sealing member provided on the coupling surface between the first coupling member, the second coupling member, and the third coupling member. [Claim 6] The second sealing member is provided between the outer surface of the first connecting member, the end of the second connecting member, and the lower surface of the third connecting member. The quick connector for ultra-low temperature vacuum piping according to claim 5, characterized in that the second sealing member is formed in a cross shape or an X shape in cross shape, or in a ring shape having a recessed groove on its outer surface. [Claim 7] Wedge-shaped projections are formed on the respective connecting surfaces of the first connecting member and the second connecting member in the portion where the second sealing member is provided. The quick connector for ultra-low temperature vacuum piping according to claim 6, characterized in that the wedge-shaped projection is formed to correspond to the groove portion on the outer surface of the second sealing member. [Claim 8] The heat conduction path forming means is A first heat conduction path member is provided in the male connector and is configured to form a zigzag-shaped heat conduction path, The female connector includes a second heat conduction path member configured to form a zigzag-shaped heat conduction path, The first heat conduction path member and the second heat conduction path member have a cross-section that is ” glyph, “ The character shape, or " A quick connector for ultra-low temperature vacuum piping according to claim 1, characterized in that it is formed of a tubular body that is formed in one of the shapes of ". [Claim 9] The quick connector for cryogenic vacuum piping according to claim 8, characterized in that one of the first heat conduction path member and the second heat conduction path member is configured to extend toward the side to which the other is provided and to be in partial contact with the other. [Claim 10] The present invention further includes a third sealing member provided at the contact portion between the first heat conduction path member and the second heat conduction path member, The quick connector for ultra-low temperature vacuum piping according to claim 9, characterized in that the third sealing member blocks the connection between the spaces separated on the upper and lower sides with respect to the contact surface between the first heat conduction path member and the second heat conduction path member, thereby separating the spaces.

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