Heat insulation layer structure of liquid nitrogen low-temperature container

Abstract

The utility model discloses a liquid nitrogen low-temperature container heat insulation layer structure, which relates to the technical field of liquid nitrogen low-temperature containers and comprises a cylinder and a top cover at the top of the cylinder, a second outer ring is fixedly connected to the outer surface of the top end of the cylinder, a plurality of locking mechanisms are mounted on the outer side of the second outer ring, a mounting cavity is formed in the cylinder, and a heat insulation plate is mounted on the inner side of the mounting cavity. Through the collaborative design of the multi-layer composite heat insulation plate and the vacuum cavity, excellent heat insulation and heat shielding effects are achieved, heat exchange is remarkably reduced, long-term stability of an internal low-temperature environment is ensured, meanwhile, a limiting and pressing mechanism driven by a spring is utilized in the installation process, and the installation efficiency is improved. Automatic positioning and preliminary fixing of the structure are achieved, the overall sealing performance and the anti-seismic performance are improved through multiple locking mechanisms and mechanical connection, heat insulation, protection and installation convenience are considered, the operation reliability of equipment under the complex working condition is effectively improved, and the service life of the equipment under the complex working condition is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen cryogenic container technology, and in particular to an insulation layer structure for a liquid nitrogen cryogenic container. Background Technology

[0002] The liquid nitrogen tank has a vacuum jacket inside, in which air is removed to create a vacuum, which greatly reduces the heat transfer through conduction and convection, slows down the evaporation rate of liquid nitrogen, and maintains a low-temperature environment.

[0003] However, in existing technologies, when the sealing performance is poor, sealing gaps will appear, forming heat conduction paths or convection channels. This causes external heat to be rapidly transferred to the low-temperature medium, and external moisture to enter the low-temperature area through the gaps. This moisture will condense into water or frost inside the insulation layer or on the outer wall of the equipment, further damaging the insulation structure. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art where the sealing gap forms a heat conduction path or convection channel, causing external heat to be rapidly transferred to the cryogenic medium. Therefore, this invention proposes a liquid nitrogen cryogenic container insulation layer structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a liquid nitrogen cryogenic container insulation layer structure, including a cylinder and a top cover, a second outer ring is fixedly connected to the outer surface of the top of the cylinder, a plurality of locking mechanisms are installed on the outer side of the second outer ring, an installation cavity is opened inside the cylinder, an insulation plate is installed on the inner side of the installation cavity, an installation ring is fixedly connected to the top of the insulation plate, a plug-in ring is fixedly connected to the center of the top of the installation ring, an outer layer is provided on the outer side of the insulation plate, a vacuum cavity is opened in the middle of the insulation plate, and an inner layer is provided on the inner side of the insulation plate.

[0006] The locking mechanism includes a fixed plate, a fixed rod is fixedly connected to the inner side of one end of the fixed plate, and a movable rod is slidably connected to the other end of the fixed plate. A lifting plate is rotatably connected to the top of the movable rod.

[0007] Preferably, a first outer ring is fixedly connected to the outer surface of the bottom end of the top cover, and the first outer ring is fitted with a second outer ring.

[0008] Preferably, the bottom of the top cover has a slot for inserting a connecting ring.

[0009] Preferably, a limiting groove is provided at the top of the cylinder, and the limiting groove is inserted into the mounting ring.

[0010] Preferably, a pressing block is fixedly connected to the bottom of one end of the lifting plate, and the top of the fixing rod is fixedly connected to the second outer ring.

[0011] Preferably, a limit block is fixedly connected to the bottom end of the movable rod, and a spring is provided between the limit block and the fixed plate.

[0012] Preferably, the spring is sleeved on the outer surface of the movable rod.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, the synergistic design of multi-layer composite insulation board and vacuum cavity achieves excellent heat insulation and heat shielding effect, significantly reduces heat exchange, and ensures long-term stability of the internal low temperature environment. At the same time, the spring-driven limiting and clamping mechanism is used during installation to achieve automatic positioning and initial fixation of the structure. Multiple locking mechanisms and mechanical connections improve the overall sealing and seismic performance, taking into account heat insulation, protection and installation convenience, and effectively improving the operational reliability and service life of the equipment under complex working conditions.

[0015] 2. In this utility model, the installation ring and the limiting groove cooperate to achieve stable limiting and precise positioning of the insulation board, preventing loosening or displacement during use. At the same time, the slots between the outer rings and the plug-in rings are tightly engaged, effectively improving the sealing and structural strength of the connection parts, blocking heat and gas penetration, and ensuring the insulation effect. The overall structure has good guiding and self-positioning capabilities. During installation, multiple parts can be aligned and locked simultaneously, greatly reducing the dependence on manual precision, improving assembly efficiency and consistency, and ensuring the stability and reliability of the system in long-term use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the insulation layer structure of a liquid nitrogen cryogenic container proposed in this utility model.

[0017] Figure 2 This is a cross-sectional three-dimensional structural diagram of the insulation layer structure of a liquid nitrogen cryogenic container proposed in this utility model;

[0018] Figure 3 This is a cross-sectional view of the insulation plate structure of the insulation layer of a liquid nitrogen cryogenic container proposed in this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the locking mechanism in the insulation layer structure of a liquid nitrogen cryogenic container proposed in this utility model.

[0020] Legend: 1. Top cover; 11. Slot; 2. First outer ring; 3. Insulation board; 31. Outer layer; 32. Mounting ring; 33. Insertion ring; 34. Vacuum chamber; 35. Inner layer; 4. Locking mechanism; 41. Compression block; 42. Lifting plate; 43. Movable rod; 44. Fixed plate; 45. Spring; 46. Limiting block; 47. Fixed rod; 5. Second outer ring; 6. Cylinder; 61. Mounting cavity; 62. Limiting groove. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figures 1-4 As shown, this utility model provides a liquid nitrogen cryogenic container insulation layer structure, including a cylinder 6 and a top cover 1 at its top. A second outer ring 5 is fixedly connected to the outer surface of the top of the cylinder 6. Multiple locking mechanisms 4 are installed on the outer side of the second outer ring 5. An installation cavity 61 is opened inside the cylinder 6. An insulation plate 3 is installed inside the installation cavity 61. An installation ring 32 is fixedly connected to the top of the insulation plate 3. A plug-in ring 33 is fixedly connected to the center of the top of the installation ring 32. An outer layer 31 is provided on the outer side of the insulation plate 3, and a vacuum cavity 34 is opened in the middle of the insulation plate 3. An inner layer 35 is provided on the inner side of the insulation plate 3.

[0024] The locking mechanism 4 includes a fixed plate 44, a fixed rod 47 is fixedly connected to the inner side of one end of the fixed plate 44, and a movable rod 43 is slidably connected to the other end of the fixed plate 44. A lifting plate 42 is rotatably connected to the top of the movable rod 43.

[0025] The specific setup and function of this embodiment are described below. During the installation of the insulation board 3, it is first inserted into the internal structure of the mounting cavity 61. The outer layer 31 of the insulation board 3 is made of a material with elastic cushioning properties, which can effectively absorb vibrations and impacts from the outside during transportation and installation, protecting the internal structure, especially the inner liner, and preventing performance damage or structural displacement caused by collisions. Meanwhile, the inner layer 35 of the insulation board 3 is a multi-layer composite structure, consisting of alternating layers of materials with good heat reflectivity, such as aluminum foil, polyester film, or aluminized plastic film, and spacer materials with heat insulation properties, such as glass fiber and nylon mesh. This composite structure not only significantly reduces thermal conductivity but also enhances the shielding effect against heat radiation, making its insulation performance close to or even better than that of ordinary vacuum insulation materials. Furthermore, the vacuum cavity 34 set in the insulation board 3 further weakens the exchange of heat between the inside and outside by blocking the heat conduction and convection paths, thereby achieving long-term stable maintenance of the internal low-temperature environment and effectively improving the overall thermal insulation performance of the structure.

[0026] When installing the top cover 1 and the first outer ring 2, the elastic return characteristic of the spring 45 is utilized. When the installation force is applied, the spring 45 drives the limiting block 46 to move downward, which in turn drives the movable rod 43 connected to it to slide along the direction of the fixed plate 44. During this process, the sliding action of the movable rod 43 will simultaneously drive the lifting plate 42 to move downward, causing the pressing block 41 on the lifting plate 42 to perform a pressing action, pressing against the top edge of the first outer ring 2, achieving initial pressing and positioning fixation. In order to ensure the stability of the structure and good sealing performance after installation, multiple locking mechanisms 4 are also set up to work together to further enhance the fastening effect of the connection parts. Finally, the mechanical connection of the structure is completed by bolts and other connecting parts, so that the overall assembly not only has good sealing performance, but also has the characteristics of vibration resistance, compression resistance and high reliability, ensuring that the container can operate stably for a long time in actual applications.

[0027] Example 2: Figure 2 and Figure 4 As shown, a first outer ring 2 is fixedly connected to the outer surface of the bottom end of the top cover 1, and the first outer ring 2 fits against the second outer ring 5. A slot 11 is provided at the bottom of the top cover 1, and the slot 11 is inserted into the insertion ring 33. A limiting groove 62 is provided at the top of the cylinder 6, and the limiting groove 62 is inserted into the mounting ring 32. A pressing block 41 is fixedly connected to the bottom of one end of the lifting plate 42, and the top end of the fixing rod 47 is fixedly connected to the second outer ring 5. A limiting block 46 is fixedly connected to the bottom end of the movable rod 43, and a spring 45 is provided between the limiting block 46 and the fixing plate 44. The spring 45 is sleeved on the outer surface of the movable rod 43.

[0028] The overall effect of this embodiment is that during the installation of the insulation panel 3, it is first inserted into the mounting cavity 61, allowing the insulation panel 3 to be stably embedded in the entire structure. During this process, the mounting ring 32 located on the outside of the insulation panel 3 also simultaneously engages with the limiting groove 62 provided on the inner wall of the mounting cavity 61, thereby effectively limiting and initially positioning the insulation panel 3, preventing it from loosening or shifting during subsequent use. Simultaneously, when the first outer ring 2 and the second outer ring 5 come into contact, the locking groove 11 located between them and the insertion ring 33 also achieve precise engagement, which not only enhances the sealing performance of the connection points, effectively blocking external heat conduction and air infiltration, but also further improves the overall stability of the component.

[0029] Furthermore, this assembly structure features excellent guidance and self-positioning capabilities, making the installation process more convenient and efficient. Simply align and insert the components according to the structure's guidance to achieve simultaneous positioning and locking of multiple parts, reducing the requirements for installation precision, minimizing manual alignment errors, and greatly improving the convenience and consistency of installation.

[0030] The usage and working principle of this device are as follows: When installing the insulation panel 3, it is first inserted into the installation cavity 61. At this time, the outer layer 31 can act as a buffer and protector, effectively absorbing vibrations and impacts during transportation and protecting the inner liner from damage. Meanwhile, the inner layer 35 is made of reflective materials such as aluminum foil, polyester film, or aluminized plastic film, alternately layered with spacer materials such as glass fiber and nylon mesh, which can significantly reduce thermal conductivity, achieving the effect of ordinary vacuum insulation. Furthermore, the vacuum cavity 34 further reduces heat transfer between the inside and outside of the container by blocking heat conduction and convection paths, thereby effectively maintaining the internal low-temperature environment.

[0031] During the installation of the top cover 1 and the first outer ring 2, the elasticity of the spring 45 pushes the limiting block 46 downward, which in turn causes the movable rod 43 to slide relative to the fixed plate 44, causing the lifting plate 42 to move downward and drive the pressing block 41 to abut against the top of the first outer ring 2. The coordinated action of multiple locking mechanisms 4 improves the strength and sealing of the connection. After final fixing with bolts and other connecting parts, the sealing effect will be further enhanced.

[0032] In addition, when installing the insulation board 3, the installation ring 32 can be accurately inserted into the limiting groove 62, and when the first outer ring 2 and the second outer ring 5 come into contact with each other, the slot 11 can also be engaged with the plug ring 33, thereby improving the overall connection sealing performance and further enhancing the convenience of installation operation.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A liquid nitrogen cryogenic container insulation layer structure, comprising a cylindrical body (6) and a top cover (1) thereon, characterized in that: A second outer ring (5) is fixedly connected to the outer surface of the top of the cylinder (6). Multiple locking mechanisms (4) are installed on the outer side of the second outer ring (5). An installation cavity (61) is opened inside the cylinder (6). An insulation plate (3) is installed inside the installation cavity (61). An installation ring (32) is fixedly connected to the top of the insulation plate (3). A plug ring (33) is fixedly connected to the center of the top of the installation ring (32). An outer layer (31) is provided on the outer side of the insulation plate (3). A vacuum cavity (34) is opened in the middle of the insulation plate (3). An inner layer (35) is provided on the inner side of the insulation plate (3). The locking mechanism (4) includes a fixed plate (44), a fixed rod (47) is fixedly connected to the inner side of one end of the fixed plate (44), and a movable rod (43) is slidably connected to the other end of the fixed plate (44). A lifting plate (42) is rotatably connected to the top of the movable rod (43).

2. The insulation layer structure of a liquid nitrogen cryogenic container according to claim 1, characterized in that: The top cover (1) has a first outer ring (2) fixedly connected to the outer surface of the bottom end, and the first outer ring (2) is in contact with the second outer ring (5).

3. The insulation layer structure of a liquid nitrogen cryogenic container according to claim 1, characterized in that: The bottom of the top cover (1) has a slot (11) which is inserted into the insertion ring (33).

4. The insulation layer structure of a liquid nitrogen cryogenic container according to claim 1, characterized in that: A limiting groove (62) is provided at the top of the cylinder (6), and the limiting groove (62) is inserted into the mounting ring (32).

5. The insulation layer structure of a liquid nitrogen cryogenic container according to claim 1, characterized in that: A pressing block (41) is fixedly connected to the bottom of one end of the lifting plate (42), and the top of the fixing rod (47) is fixedly connected to the second outer ring (5).

6. The insulation layer structure of a liquid nitrogen cryogenic container according to claim 1, characterized in that: A limit block (46) is fixedly connected to the bottom of the movable rod (43), and a spring (45) is provided between the limit block (46) and the fixed plate (44).

7. The insulation layer structure of a liquid nitrogen cryogenic container according to claim 6, characterized in that: The spring (45) is sleeved on the outer surface of the movable rod (43).

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