Vacuum joint of low-temperature heat insulation container
By adopting the fixed connection between male and female heads and inner tube design in the vacuum joint, combined with sealing and thermal insulation structure, the problems of inconvenient installation and maintenance and large heat leakage in the prior art are solved, and more efficient liquid hydrogen is achieved Storage and longer storage time.
Patent Information
- Application Number
- CN202421220923.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The main connection methods of existing vacuum joints are flanges and welding, which are inconvenient to install and maintain, and are difficult to meet the needs of regular maintenance of on-board liquid hydrogen cylinders, and lead to large heat leakage, affecting the storage efficiency of liquid hydrogen.
A vacuum joint of a low-temperature insulated container is designed, which is fixedly connected by male and female heads, and a vacuum cavity and gap are formed through the design of inner tube and connecting tube, combining sealing grooves, grooves, protrusions, mounting parts and clamps. Structure, improve sealing and thermal insulation properties.
It effectively reduces heat leakage in the gas cylinder, improves the lossless storage time of liquid hydrogen, and enhances the thermal insulation performance of the joint and the convenience of installation and maintenance.
Smart Images
Figure CN222277901U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vacuum joints, in particular to a vacuum joint of a low-temperature heat-insulating container. Background Art
[0002] Liquid hydrogen has a high storage density and has certain advantages in the storage and transportation of hydrogen, especially for on-board hydrogen storage, which has an obvious advantage of long driving range. Liquid hydrogen must be stored at an extremely low temperature (-253°C), otherwise it will gasify and evaporate. Therefore, the heat leakage of on-board liquid hydrogen cylinders is very high. Among them, one of the main ways of heat leakage is the connection between the external pipeline and the cylinder shell. Therefore, in order to reduce the heat leakage, a low heat leakage vacuum joint is necessary.
[0003] In the prior art, for example, the technical solution described in the patent with publication number: CN211315438U is: a vacuum joint and a vacuum system, including a joint seat, a joint body and an air volume regulating valve, the joint seat has a chamber inside, the joint body includes a vacuum air channel and a second through hole, one end of the vacuum air channel is connected to an external vacuum source, and the other end is connected to the second through hole to connect the chamber with the vacuum source.
[0004] In the prior art, the main connection methods for vacuum joints are flanges and welding, which are inconvenient to install and maintain. They are not suitable for scenarios such as on-board liquid hydrogen cylinders that require regular maintenance, so vacuum joints that are easy to install and maintain are also necessary. Utility Model Content
[0005] The purpose of the utility model is to provide a vacuum joint for a low-temperature insulated container, so as to solve the problem that in the prior art proposed in the background technology, the main connection methods of the traditional vacuum joints are flanges and welding, which are inconvenient to install and maintain; and it is not practical for scenarios such as vehicle-mounted liquid hydrogen cylinders that require regular maintenance.
[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0007] A vacuum joint for a low-temperature insulation container, comprising a male head, a female head and an inner tube; wherein the female head is fixedly connected to the male head, and the inner tube is arranged inside the male head and fixedly connected to the male head;
[0008] A first connection end is provided at one end of the male connector; a first connection tube is provided in the middle of the first connection end; the inner tube is provided inside the first connection tube, a second connection end is provided at the other end of the male connector, a vacuum chamber is provided in the middle of the second connection end, and the vacuum chamber is communicated with the first connection tube;
[0009] One end of the female connector is provided with a third connection end, and the third connection end is abutted against the first connection end; the other end of the female connector is provided with an outer layer and an inner sleeve; a vacuum portion is formed between the inner sleeve and the outer layer; and the first connection tube is arranged inside the inner sleeve.
[0010] According to the above technical solution, a sealing groove is provided on the end surface of the first connecting end, and the sealing groove is used for installing a sealing ring.
[0011] According to the above technical solution, two sealing grooves are provided, and sealing rings are respectively provided inside the two sealing grooves.
[0012] According to the above technical solution, a groove is further provided on the end face of the first connection end, and a protrusion corresponding to the groove is provided on the third connection end. The protrusion is embedded in the inside of the groove for connecting the male head and the female head.
[0013] According to the above technical solution, a mounting portion is provided inside the first connecting pipe, and the mounting portion is used to mount the inner pipe.
[0014] According to the above technical solution, the inner tube is fixedly connected to the mounting portion, and a gap is formed between the inner tube and the first connecting tube through the mounting portion, and the gap is communicated with the vacuum chamber.
[0015] According to the above technical solution, a first inclined surface is also provided at the end of the first connecting pipe, and a second inclined surface matching the first inclined surface is provided inside the inner sleeve. The first inclined surface and the second inclined surface are used for installing the first connecting pipe and the inner sleeve.
[0016] According to the above technical solution, a clamp is also provided on the outer wall of the male head and the female head, and the clamp is used to fix the male head and the female head.
[0017] According to the above technical solution, the clamp is arranged on the outside of the third connecting end and the first connecting end.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] In the utility model, the first connecting end provided on the male head is abutted against the third connecting end provided on the female head, so that the male head and the female head are connected; and a vacuum cavity is provided in the middle of the second connecting end, a vacuum part is provided between the outer layer and the inner sleeve, and the inner tube is provided inside the first connecting tube; so that when the medium flows inside the inner tube, it can have better insulation performance.
[0020] The device of the utility model makes the thermal insulation performance of the joint better, effectively reduces the heat leakage of the gas cylinder, thereby reducing the static evaporation rate of the entire vehicle-mounted liquid hydrogen cylinder and increasing the lossless storage time of liquid hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1It is a schematic diagram of the overall structure of the utility model;
[0022] Figure 2 This is a schematic diagram of the internal structure of the utility model;
[0023] Figure 3 This is a schematic diagram of the male plug structure of the utility model;
[0024] Figure 4 This is a schematic diagram of the female connector structure of the utility model.
[0025] Markings in the figure: 100-male head, 200-female head, 300-inner tube, 400-first connecting end, 500-first connecting tube, 600-second connecting end, 700-vacuum chamber, 800-third connecting end, 900-outer layer, 110-inner sleeve, 111-vacuum part, 112-sealing groove, 113-groove, 114-protrusion, 115-installing part, 116-first inclined surface, 117-second inclined surface, 118-clamp. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] Embodiment 1
[0028] like Figure 1 and Figure 2 As shown, a vacuum joint of a low-temperature insulation container includes a male connector 100, a female connector 200 and an inner tube 300; wherein the female connector 200 is fixedly connected to the male connector 100, and the inner tube 300 is arranged inside the male connector 100 and fixedly connected to the male connector 100;
[0029] like Figure 3 As shown, a first connection end 400 is provided at one end of the male connector 100; a first connection tube 500 is provided in the middle of the first connection end 400; the inner tube 300 is provided inside the first connection tube 500, a second connection end 600 is provided at the other end of the male connector 100, a vacuum chamber 700 is provided in the middle of the second connection end 600, and the vacuum chamber 700 is communicated with the first connection tube 500;
[0030] like Figure 4As shown, one end of the female connector 200 is provided with a third connection end 800, and the third connection end 800 is abutted against the first connection end 400; the other end of the female connector 200 is provided with an outer layer 900 and an inner sleeve 110; a vacuum portion 111 is formed between the inner sleeve 110 and the outer layer 900; and the first connection tube 500 is arranged inside the inner sleeve 110.
[0031] In the utility model, the first connection end 400 provided on the male head 100 is abutted against the third connection end 800 provided on the female head 200, so that the male head 100 and the female head 200 are connected; and a vacuum chamber 700 is provided in the middle of the second connection end 600, a vacuum part 111 is provided between the outer layer 900 and the inner sleeve 110, and the inner tube 300 is provided inside the first connecting tube 500; so that when the medium flows inside the inner tube 300, it can have better insulation performance.
[0032] The device of the utility model makes the thermal insulation performance of the joint better, effectively reduces the heat leakage of the gas cylinder, thereby reducing the static evaporation rate of the entire vehicle-mounted liquid hydrogen cylinder and increasing the lossless storage time of liquid hydrogen.
[0033] Embodiment 2
[0034] This embodiment is a further refinement of the first embodiment.
[0035] like Figure 3 As shown, a sealing groove 112 is provided on the end surface of the first connecting end 400, and the sealing groove 112 is used to install a sealing ring. There are two sealing grooves 112, and sealing rings are respectively provided inside the two sealing grooves 112.
[0036] Specifically, by arranging sealing rings inside the two sealing grooves 112 , the two sealing rings form a soft seal under the cooperation of the male connector 100 and the female connector 200 to prevent the circulating medium from leaking out.
[0037] like Figure 2 As shown, a groove 113 is further provided on the end surface of the first connection end 400 , and a protrusion 114 corresponding to the groove 113 is provided on the third connection end 800 . The protrusion 114 is embedded in the groove 113 for connecting the male connector 100 with the female connector 200 .
[0038] Specifically, by embedding the protrusion 114 on the third connection end 800 into the groove 113 on the first connection end 400 , the protrusion 114 and the groove 113 are matched, which facilitates the positioning connection between the male connector 100 and the female connector 200 .
[0039] The first connecting tube 500 is provided with a mounting portion 115 for mounting the inner tube 300. The inner tube 300 is fixedly connected to the mounting portion 115, and a gap is formed between the inner tube 300 and the first connecting tube 500 through the mounting portion 115, and the gap is communicated with the vacuum chamber 700.
[0040] Specifically, Figure 3 As shown, a mounting portion 115 is provided inside the first connecting tube 500, and the mounting portion 115 is used for fixed connection with the inner tube 300 (e.g., welding); and after the inner tube 300 is fixed to the mounting portion 115, a certain gap (e.g., 1 mm) is formed between the inner tube 300 and the first connecting tube 500, and the gap is connected to the vacuum chamber 700. When the vacuum chamber 700 is evacuated, a vacuum environment is also formed inside the first connecting tube 500, thereby reducing the heat exchange between the inner tube 300 and the outside, and maintaining the temperature of the flowing medium (e.g., liquid hydrogen) in the inner tube 300.
[0041] A first inclined surface 116 is also provided at the end of the first connecting tube 500 , and a second inclined surface 117 matching the first inclined surface 116 is provided inside the inner sleeve 110 . The first inclined surface 116 and the second inclined surface 117 are used for installing the first connecting tube 500 and the inner sleeve 110 .
[0042] Specifically, Figure 2 As shown, when the first connecting tube 500 is connected to the inner sleeve 110, the first inclined surface 116 and the second inclined surface 117 cooperate to make the first connecting tube 500 and the inner sleeve 110 hard-sealed, thereby improving the sealing ability between the first connecting tube 500 and the inner sleeve 110.
[0043] like Figure 1 As shown, a clamp 118 is further provided on the outer wall of the male connector 100 and the female connector 200, and the clamp 118 is used to fix the male connector 100 and the female connector 200. The clamp 118 is provided on the outer side of the third connection end 800 and the first connection end 400.
[0044] Specifically, the clamp 118 is sleeved on the outside of the male head 100 and the female head 200, and the male head 100 and the female head 200 are fixedly connected by the clamp 118 to complete the fixation of the male head 100 and the female head 200. The clamp 118 is a V-shaped clamp, for example, a 24000-0388 V-shaped clamp produced by IDEAL-TRIDON.
[0045] Furthermore, the wall thickness of the inner sleeve 110 of the female connector 200 should be as thin as possible (for example, the wall thickness of the inner sleeve 110 is set to 0.5 to 1 mm) to reduce heat leakage.
[0046] The working principle of the utility model is as follows: when in use, firstly, the female head 200 is matched with the first connection end 400 of the male head 100 through the third connection end 800, and the male head 100 and the female head 200 are fixedly connected through the clamp 118; the outer layer 900 of the female head 200 is welded and connected to the outer shell of the insulated gas cylinder, and the vacuum part 111 is connected to the vacuum interlayer of the insulated gas cylinder to form a vacuum space.
[0047] The male plug 100 and the inner tube 300 are connected by welding, the first connecting tube 500 is connected to the outer tube of the external vacuum pipe, the inner tube 300 is connected to the inner tube 300 of the vacuum pipe, and the vacuum chamber 700 is connected to the interlayer part of the external vacuum pipe to form a vacuum space.
[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0049] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A vacuum joint for a low temperature insulation container, characterized in that: It comprises a male head (100), a female head (200) and an inner tube (300); wherein the female head (200) is fixedly connected to the male head (100), and the inner tube (300) is arranged inside the male head (100) and is fixedly connected to the male head (100); A first connection end (400) is provided at one end of the male connector (100); a first connection tube (500) is provided in the middle of the first connection end (400); the inner tube (300) is provided inside the first connection tube (500); a second connection end (600) is provided at the other end of the male connector (100); a vacuum chamber (700) is provided in the middle of the second connection end (600); and the vacuum chamber (700) is communicated with the first connection tube (500); One end of the female connector (200) is provided with a third connection end (800), and the third connection end (800) is in abutment with the first connection end (400); the other end of the female connector (200) is provided with an outer layer (900) and an inner sleeve (110); a vacuum portion (111) is formed between the inner sleeve (110) and the outer layer (900); and the first connection tube (500) is arranged inside the inner sleeve (110).
2. A vacuum joint for a cryogenic insulation container according to claim 1, characterized in that: A sealing groove (112) is provided on the end surface of the first connecting end (400), and the sealing groove (112) is used for installing a sealing ring.
3. A vacuum joint for a cryogenic insulation container according to claim 2, characterized in that: Two sealing grooves (112) are provided, and sealing rings are respectively provided inside the two sealing grooves (112).
4. The vacuum joint of a cryogenic insulation container according to claim 1, characterized in that: A groove (113) is also provided on the end surface of the first connection end (400), and a protrusion (114) corresponding to the groove (113) is provided on the third connection end (800). The protrusion (114) is embedded in the interior of the groove (113) and is used for connecting the male connector (100) and the female connector (200).
5. The vacuum joint of a low-temperature insulation container according to claim 1, characterized in that: A mounting portion (115) is provided inside the first connecting pipe (500), and the mounting portion (115) is used to mount the inner pipe (300).
6. A vacuum joint for a cryogenic insulation container according to claim 5, characterized in that: The inner tube (300) is fixedly connected to the mounting portion (115), and a gap is formed between the inner tube (300) and the first connecting tube (500) through the mounting portion (115), and the gap is communicated with the vacuum chamber (700).
7. A vacuum joint for a cryogenic insulation container according to claim 6, characterized in that: A first inclined surface (116) is also provided at the end of the first connecting tube (500), and a second inclined surface (117) matching the first inclined surface (116) is provided inside the inner sleeve (110). The first inclined surface (116) and the second inclined surface (117) are used for installing the first connecting tube (500) and the inner sleeve (110).
8. The vacuum joint of a cryogenic insulation container according to claim 1, characterized in that: A clamp (118) is also provided on the outer walls of the male head (100) and the female head (200), and the clamp (118) is used to fix the male head (100) and the female head (200).
9. A vacuum joint for a cryogenic insulation container according to claim 8, characterized in that: The clamp (118) is arranged on the outside of the third connecting end (800) and the first connecting end (400).