Multi-port connectors for liquid nitrogen vacuum lines
By using SUS304 material and telescopic joint design in the multi-port connection fittings of liquid nitrogen vacuum pipeline systems, the problem of easy damage to the four-way connection fittings under huge temperature changes is solved, achieving a longer service life and more stable system operation.
Patent Information
- Application Number
- CN202420966823.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The existing four-way connecting pipe fittings are prone to thermal expansion, cold contraction and deformation during the huge temperature difference caused by liquid nitrogen flowing through the pipeline, resulting in damage, affecting the normal operation of the liquid nitrogen vacuum pipeline system.
A multi-port connecting pipe fitting is designed, including outer sleeve and built-in pipe. The built-in pipe adopts SUS304 pipe, and a telescopic section is set at each passage of pipe. The inner pipe bracket fixes the built-in pipe in the outer sleeve.
Through the use of the expansion joints of the built-in pipe and the use of SUS304 materials, it can adapt to huge temperature differences, avoid damage caused by thermal expansion, cold contraction and deformation, extend the service life of the connecting pipe fittings, and ensure the stable operation of the liquid nitrogen vacuum pipeline system.
Smart Images
Figure CN222702833U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pipeline connector, in particular to a multi-port connector for a liquid nitrogen vacuum pipeline. Background Art
[0002] Liquid nitrogen vacuum piping system is an important equipment system in the biopharmaceutical field.
[0003] The current problem is that the four-way connecting pipe fittings need to face the strong thermal expansion and contraction deformation caused by the "huge temperature difference caused by liquid nitrogen flowing through the pipeline". However, the existing four-way connecting pipe fittings are easily damaged by the strong thermal expansion and contraction deformation, thereby affecting the normal operation of the liquid nitrogen vacuum pipeline system. Summary of the invention
[0004] The utility model aims to provide a multi-port connecting pipe fitting for a liquid nitrogen vacuum pipeline, which has good performance of resisting thermal expansion and contraction deformation, and thus has a long service life.
[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:
[0006] A multi-port connecting pipe fitting for a liquid nitrogen vacuum pipeline, the multi-port connecting pipe fitting comprising an outer sleeve and an inner pipe; the inner pipe is arranged on the inner side of the outer sleeve, and an inner pipe bracket is used to fix the through pipe of the inner pipe in the through pipe of the outer sleeve; each through pipe of the inner pipe is provided with an expansion joint.
[0007] Furthermore, the multi-port connecting pipe fitting is a four-way connecting pipe fitting.
[0008] Furthermore, the four through pipes of the four-way connecting pipe fitting are respectively a first through pipe, a second through pipe, a third through pipe and a fourth through pipe; the first through pipe and the second through pipe are both configured as male connectors, and the third through pipe and the fourth through pipe are both configured as female connectors.
[0009] Furthermore, the multi-port connecting pipe fitting is a three-way connecting pipe fitting, a four-way connecting pipe fitting or a five-way connecting pipe fitting.
[0010] Furthermore, a flange is provided at the pipe opening of each through pipe of the outer sleeve.
[0011] Furthermore, the inner tube is made of SUS304 tube.
[0012] Furthermore, the multi-port connecting pipe fitting is used in a liquid nitrogen vacuum pipeline system.
[0013] Compared with the prior art, the multi-port connecting pipe fitting of the utility model has the following beneficial effects:
[0014] An expansion joint is provided at each through-pipe of the built-in pipe, and the built-in pipe is made of SUS304 pipe. In this way, the built-in pipe can adapt to the thermal expansion and contraction deformation caused by the huge temperature difference, avoiding the damage of the built-in pipe due to thermal expansion and contraction deformation, thereby improving the overall service life of the multi-port connecting pipe fittings, and then ensuring the stable operation of the liquid nitrogen vacuum pipeline system.
[0015] In addition, an inner tube bracket is used to fix the inner tube to the inner side of the outer tube, thereby ensuring the structural stability of the inner tube inside the outer tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The utility model is a schematic structural diagram of a multi-port connecting pipe fitting for a liquid nitrogen vacuum pipeline. DETAILED DESCRIPTION
[0017] The utility model is further described below with specific embodiments:
[0018] This embodiment provides a four-way connecting pipe fitting for a liquid nitrogen vacuum pipeline. The four-way connecting pipe fitting is used in a liquid nitrogen vacuum pipeline system.
[0019] See also Figure 1 The four-way connecting pipe fitting of this embodiment is mainly composed of an outer sleeve 1 and an inner tube 2 assembled together. The outer sleeve 1 is a four-way pipe configuration, and the inner tube 2 is a four-way pipe configuration matching the outer sleeve 1.
[0020] The inner tube 2 is arranged on the inner side of the outer tube 1, and four inner tube brackets 3 are used to fix the inner tube 2 on the inner side of the outer tube 1, wherein each inner tube bracket 3 fixes a through tube of the inner tube 2 in a through tube of the outer tube 1, thereby ensuring the structural stability of the inner tube 2 inside the outer tube 1.
[0021] In this embodiment, the built-in tube 2 is made of SUS304 tube, which has good resistance to thermal expansion and contraction deformation, thereby facilitating the stable operation of the liquid nitrogen vacuum pipeline system.
[0022] The important point is,
[0023] Each through-tube of the built-in tube 2 is provided with an expansion joint 21, so that the built-in tube 2 can adapt to the thermal expansion and contraction deformation caused by the "huge temperature difference change", avoiding the phenomenon that the built-in tube 2 is damaged due to thermal expansion and contraction deformation, thereby improving the overall service life of the four-way connecting pipe fittings, and further ensuring the stable operation of the liquid nitrogen vacuum pipeline system.
[0024] Specifically, when liquid nitrogen flows through the built-in tube 2, the low temperature of the liquid nitrogen causes the built-in tube 2 to shrink and deform greatly. However, due to the provision of the expansion joint 21, the contraction of the built-in tube 2 causes the expansion joint 21 to be elongated, making up for the contracted length of the built-in tube 2. When the liquid nitrogen stops flowing, the built-in tube 2 gradually begins to expand and deform, returning to the length at room temperature, causing the expansion joint 21 to be compressed. During the entire process, due to the existence of the expansion joint 21, the built-in tube 2 as a whole will not rupture.
[0025] For the convenience of description, the four-way pipes of the four-way connecting pipe fitting are respectively referred to as first pipes (such as Figure 1 Indicated by the arrow A1), the second through pipe (such as Figure 1 Indicated by arrow A2), the third through pipe (such as Figure 1 Indicated by the arrow B1) and the fourth through pipe (as Figure 1 (indicated by arrow B2 in the figure).
[0026] The first through pipe and the second through pipe are both configured as male connectors, and the third through pipe and the fourth through pipe are both configured as female connectors.
[0027] In addition, in order to facilitate installation and connection, a flange 4 is provided at the pipe opening of each through pipe of the outer sleeve 1, and the through pipe of the four-way connecting pipe fitting is connected with other pipelines through the flange 4.
[0028] It should be noted that the structural arrangement of the four-way connecting pipe fitting of the present embodiment can also be used for other multi-port connecting pipe fittings, such as three-way connecting pipe fittings, five-way connecting pipe fittings, and the like.
[0029] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A multi-port connecting pipe fitting for a liquid nitrogen vacuum pipeline, characterized in that: The multi-port connecting pipe comprises an outer sleeve (1) and an inner tube (2); The inner tube (2) is arranged inside the outer tube (1), and an inner tube bracket (3) is used to fix the through tube of the inner tube (2) inside the through tube of the outer tube (1); Each through-pipe of the built-in pipe (2) is provided with an expansion joint (21).
2. The multi-port connecting pipe fitting for liquid nitrogen vacuum pipeline according to claim 1, characterized in that: The multi-port connecting pipe fitting is a four-way connecting pipe fitting.
3. The multi-port connecting pipe fitting for liquid nitrogen vacuum pipeline according to claim 2, characterized in that: The four through pipes of the four-way connecting pipe fitting are respectively a first through pipe, a second through pipe, a third through pipe and a fourth through pipe; The first through pipe and the second through pipe are both configured as male connectors, and the third through pipe and the fourth through pipe are both configured as female connectors.
4. The multi-port connecting pipe fitting for liquid nitrogen vacuum pipeline according to claim 1, characterized in that: The multi-port connecting pipe fitting is a three-way connecting pipe fitting, a four-way connecting pipe fitting or a five-way connecting pipe fitting.
5. The multi-port connecting pipe fitting for liquid nitrogen vacuum pipeline according to claim 1, characterized in that: A flange (4) is provided at the pipe opening of each through pipe of the outer sleeve (1).
6. The multi-port connecting pipe fitting for liquid nitrogen vacuum pipeline according to claim 1, characterized in that: The inner tube (2) is made of SUS304 tube.
7. The multi-port connecting pipe fitting for liquid nitrogen vacuum pipeline according to claim 1, characterized in that: The multi-port connecting pipe fitting is used for a liquid nitrogen vacuum pipeline system.