Molecular sieve device for low-temperature tank car

Abstract

The utility model relates to the technical field of low-temperature tank trucks, in particular to a molecular sieve device for a low-temperature tank truck, which comprises a shell with a sealed cavity formed inside, a molecular sieve accommodated in the sealed cavity, an actuating device and an opening structure arranged on the shell, a sealing component arranged at the opening structure, and a sealing component arranged on the shell by applying external acting force through the actuating device. The sealing assembly is damaged, so that the molecular sieve is communicated with the vacuum interlayer through the opening structure to adsorb gas; the molecular sieve device for the low-temperature tank car is arranged in the vacuum interlayer, so that the shell does not need to bear the pressure of the inner container, a lighter and thinner structural design can be adopted, the material cost and the self weight of the device are directly reduced, and the problems that the wall is thick and heavy and the cost is high due to pressure bearing are solved; the process of trepanning and reinforcing is omitted, the installation process is simplified, meanwhile, the structural strength of the end socket is prevented from being damaged, the problems that installation is tedious, and the strength of the end socket is affected are solved, and the reliability and economical efficiency of maintenance of the vacuum interlayer of the low-temperature tank car are integrally improved.

Description

Technical Field

[0001] This utility model relates to the field of cryogenic tank truck technology, specifically to a molecular sieve device for cryogenic tank trucks. Background Technology

[0002] In the field of cryogenic tank truck transportation, to extend the insulation life of the vacuum jacket, existing cryogenic tank trucks typically have an embedded molecular sieve device on the inner container head. This device uses the molecular sieve to adsorb residual gas within the jacket to maintain a vacuum. However, this traditional device has significant drawbacks: because it needs to withstand the internal pressure of the inner container, its shell must be made of heavy materials (such as thick-walled metal) to ensure strength, leading to increased material costs and device weight. Simultaneously, the complex internal multi-layered support frame further increases manufacturing and assembly difficulty. Furthermore, the device requires openings in the inner container head for installation, which not only increases processing steps but also weakens the head structure, requiring additional reinforcement, indirectly increasing process complexity and cost. This makes it difficult to meet the demands of modern cryogenic transportation equipment for lightweight and low-cost solutions. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides a molecular sieve device for cryogenic tank trucks, which aims to solve one or more problems existing in the above-mentioned technology.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a molecular sieve device for cryogenic tank trucks, wherein the molecular sieve device for cryogenic tank trucks is fixedly installed in the vacuum jacket of the cryogenic tank truck, comprising: a shell with a sealed chamber inside, the sealed chamber containing a molecular sieve, an actuating device and an opening structure on the shell, and a sealing component at the opening structure. When an external force is applied by the actuating device, the sealing component is broken, allowing the molecular sieve to communicate with the vacuum jacket through the opening structure to adsorb gas.

[0005] Furthermore, the actuation device includes an air inlet connected to an external air source, which pressurizes the sealing assembly by filling the sealed chamber with gas.

[0006] Furthermore, the actuating device includes a mechanical piercing component, which is a needle or blade capable of piercing the sealing assembly.

[0007] Furthermore, the shell is fixedly mounted on the end cap of the inner container of the cryogenic tank truck.

[0008] Furthermore, the shell is a flat cylindrical structure, and the end face of the shell that contacts the end cap is curved to fit the curved surface of the end cap of the cryogenic tank truck's inner container.

[0009] Furthermore, the opening structure is located at the end of the shell away from the end cap, and the sealing assembly includes aluminum foil and wire mesh; the aluminum foil covers the opening structure and is sealed to the opening structure; the wire mesh is fixed to one side of the aluminum foil to support the aluminum foil and prevent molecular sieve leakage.

[0010] Furthermore, it also includes a flange fixedly mounted on the opening structure, with an annular flange at the end of the opening structure. The flange has threaded holes corresponding to the flange holes of the flange. The flange is fixedly connected to the flange by bolts, and the aluminum foil and wire mesh are clamped between the flange and the retaining ring.

[0011] Furthermore, gaskets are placed between the aluminum foil and the wire mesh, and between the aluminum foil and the flange.

[0012] Furthermore, a perforated plate is provided between the wire mesh and the gasket.

[0013] The molecular sieve device for cryogenic tank trucks described in this utility model has the following advantages: By placing the molecular sieve device for cryogenic tank trucks inside the vacuum jacket, the shell does not need to bear the pressure of the inner container, allowing for a lighter and thinner structural design, directly reducing material costs and device weight, and solving the problem of "thick walls and high costs due to pressure bearing"; at the same time, the device does not require drilling holes in the inner container end cap for installation, eliminating the need for drilling and reinforcement processes, simplifying the installation process while avoiding damage to the end cap structure strength, solving the problem of "cumbersome installation and impact on end cap strength", and overall improving the reliability and economy of maintaining the vacuum jacket of cryogenic tank trucks. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the planar structure of an embodiment of the present utility model;

[0015] Figure 2 This is an enlarged view of a portion of the structure of an embodiment of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Shell; 11. Molecular sieve; 12. Air inlet; 13. Flange; 14. Flange; 15. Aluminum foil; 16. Wire mesh; 17. Gasket; 18. Perforated plate; 19. Opening structure; 2. End cap; 3. Bolt. Detailed Implementation

[0017] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0018] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] To further illustrate the principle and structure of this utility model, the preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] like Figure 1-2 As shown, this utility model embodiment provides a molecular sieve 11 device, including: a shell 1 forming a sealed chamber inside, a molecular sieve 11 placed inside the chamber, an actuation device and an opening structure 19 provided on the shell 1, and a sealing component provided at the opening structure 19. In the initial state, the sealing component isolates the chamber from the vacuum jacket. After the sealing component is broken by an external force applied by the actuation device, the molecular sieve 11 can communicate with the vacuum jacket through the opening structure 19 to adsorb gas.

[0021] This invention, by placing the molecular sieve 11 within the vacuum jacket, eliminates the need for the shell 1 to bear the pressure of the inner container, allowing for a thinner and lighter structural design. This directly reduces material costs and device weight, solving the problem of "heavy walls and high costs due to pressure bearing." By setting an actuation device and an opening structure 19 on the shell 1, the sealing components are destroyed in a controllable manner, enabling precise activation of the molecular sieve 11 after vacuuming the vacuum jacket. This avoids the defects of traditional fixed seals that fail prematurely or cannot be flexibly activated, solving the problem of "insufficient sealing reliability." Simultaneously, the device does not require drilling holes in the inner container head 2 for installation, eliminating the need for drilling and reinforcement processes. This simplifies the installation process while preventing damage to the structural strength of the head 2, solving the problem of "cumbersome installation and impact on the strength of the head 2." Overall, this improves the reliability and economy of maintaining the vacuum jacket of cryogenic tank trucks.

[0022] The actuation device includes two implementation methods: The first is an inflation port 12, connected to an external gas source. The pipeline of the external gas source passes through the outer container of the cryogenic tanker and enters the vacuum jacket, communicating with the sealed chamber. When the molecular sieve 11 needs to be activated, gas is injected into the sealed chamber through the inflation port 12. As the pressure inside the chamber increases, the sealing assembly is broken under the pressure difference, allowing the molecular sieve 11 to communicate with the vacuum jacket. The second method is a mechanical piercing component (not shown). This component is a needle or blade capable of piercing the sealing assembly. External mechanical force causes the needle / blade to penetrate the sealing assembly, forming a communication opening, thereby activating the adsorption function of the molecular sieve 11. Both implementation methods destroy the sealing assembly in a controllable manner, ensuring that after the vacuum jacket is evacuated, the molecular sieve 11 can contact the gas inside the jacket as needed, achieving adsorption of residual gas and maintaining the vacuum state of the jacket, thus solving the problem of the inflexible activation of traditional devices.

[0023] The housing 1 of the molecular sieve 11 device is fixedly mounted on the end cap 2 of the inner container of the cryogenic tanker. It has a flat cylindrical structure and the end face that contacts the end cap 2 is curved. This curved surface is precisely adapted to the curved contour of the inner container end cap 2. It is tightly fitted and fixed by welding or bolts 3. This not only allows for stable installation in the vacuum jacket and saves space, but also reduces stress concentration through the curved surface fit, avoids displacement caused by vibration, and provides a stable cryogenic conduction path for the molecular sieve 11.

[0024] The opening structure 19 is located at the end of the shell 1 away from the end cap 2. The sealing assembly here includes aluminum foil 15 and wire mesh 16: aluminum foil 15 covers the opening structure 19 and achieves a sealed connection by bonding or mechanical clamping, forming an initial barrier that isolates the interior of the shell 1 from the vacuum interlayer, preventing the molecular sieve 11 from contacting the interlayer gas in advance; the wire mesh 16 is fixed to the inside of the aluminum foil 15, is made of stainless steel and has a mesh size smaller than the particle size of the molecular sieve 11, which not only supports the aluminum foil 15 to resist the pressure difference during vacuuming and prevents it from breaking in advance, but also prevents the molecular sieve 11 particles from leaking into the interlayer.

[0025] The outer side of the opening structure 19 is sealed and fixed by the flange 14 assembly: the annular flange 13 at the end of the opening has threaded holes corresponding to the flange 14, and the flange 14 is fastened to the flange 13 by bolts 3, clamping the aluminum foil 15, wire mesh 16, gasket 17 and perforated plate 18 between them; gaskets 17 are provided between the aluminum foil 15 and the wire mesh 16, and between the aluminum foil 15 and the flange 14. The gaskets 17 are made of rubber or polytetrafluoroethylene and fill the gaps between the flange 14 surfaces to enhance the sealing performance, while evenly distributing the fastening force of the bolts 3 and preventing local damage to the aluminum foil 15; the perforated plate 18 is a rigid metal plate, located between the wire mesh 16 and the gasket 17, with evenly perforated surfaces, supporting the wire mesh 16 with its own strength to prevent the wire mesh 16 from deforming or breaking due to force during vacuuming. This multi-layer structure, through the synergy of mechanical clamping and material properties, not only ensures the reliability of the initial seal, but also provides a controllable weak point for the actuation device to damage the aluminum foil 15, solving the problems of easy breakage of the wire mesh 16 and easy leakage of the seal, and improving the long-term stability of the device.

[0026] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A molecular sieve device for cryogenic tank trucks, wherein the molecular sieve device is fixedly installed within the vacuum jacket of the cryogenic tank truck, characterized in that, include: The shell has a sealed chamber inside, which contains a molecular sieve. The shell is equipped with an actuating device and an opening structure, and the opening structure is equipped with a sealing component. An external force is applied by an actuator, which breaks the sealing assembly, allowing the molecular sieve to connect with the vacuum jacket through the opening structure to adsorb gas.

2. The molecular sieve device for cryogenic tank trucks according to claim 1, characterized in that, The actuation device includes an air inlet connected to an external air source, which pressurizes the sealing assembly by filling the sealed chamber with gas.

3. The molecular sieve device for cryogenic tank trucks according to claim 1, characterized in that, The actuating device includes a mechanical piercing component, which is a needle or blade capable of piercing the sealing assembly.

4. The molecular sieve device for cryogenic tank trucks according to claim 1, characterized in that, The shell is fixedly mounted on the end cap of the inner container of the cryogenic tank truck.

5. The molecular sieve device for cryogenic tank trucks according to claim 4, characterized in that, The shell is a flat cylindrical structure, and the end face of the shell that contacts the end cap is curved to fit the curved surface of the end cap of the cryogenic tank truck's inner container.

6. The molecular sieve device for cryogenic tank trucks according to claim 5, characterized in that, The opening structure is located at the end of the shell away from the head, and the sealing assembly includes aluminum foil and wire mesh; the aluminum foil covers the opening structure and is sealed to the opening structure; the wire mesh is fixed to one side of the aluminum foil to support the aluminum foil and prevent molecular sieve leakage.

7. The molecular sieve device for cryogenic tank trucks according to claim 6, characterized in that, It also includes a flange fixedly mounted on an open structure. The end of the open structure is provided with an annular flange with threaded holes corresponding to the flange holes of the flange. The flange is fixedly connected to the flange by bolts, and aluminum foil and wire mesh are clamped between the flange and the retaining ring.

8. The molecular sieve device for cryogenic tank trucks according to claim 6, characterized in that, Gaskets are placed between the aluminum foil and the wire mesh, and between the aluminum foil and the flange.

9. The molecular sieve device for cryogenic tank trucks according to claim 8, characterized in that, A perforated plate is provided between the wire mesh and the gasket.

Images