Sealing cold insulation structure of cold box
By installing ring plates in the outer wall of the cold box pipe and limiting the ring plates to the first and second insulating ring rings, the extrusion problems caused by thermal expansion, cold-box sealing and cold-keeping structures during thermal expansion, cooling and processing dimension deviations are solved, and the good sealing and cold-keeping performance of the cold box and the smooth assembly of the assembly are achieved.
Patent Information
- Application Number
- CN202421846088.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The existing cold box sealed cold-insulating structures have extrusion problems caused by thermal expansion, contraction and processing dimensional deviation, resulting in increased leakage of insulation materials and assembly difficulties.
A cold box sealing and cold-proof structure is designed. By installing a ring plate on the outer wall of the cold box pipe, and sealing the ring plate is limited in the first insulating ring and the second insulating ring, the cold box pipe is only in direct contact with the ring plate, reducing heat energy conduction and cooling capacity loss. At the same time, the first insulating ring and the second insulating ring leave an expansion gap with the cold box pipe to avoid squeezing between components.
It effectively reduces heat energy conduction and cooling capacity losses, avoids extrusion between components, and ensures the sealing and cold-keeping performance of the cold box and the smooth assembly.
Smart Images
Figure CN223019787U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sealing and cold insulation, and in particular to a cold box sealing and cold insulation structure. Background Art
[0002] Cold boxes play a crucial role in the air separation and natural gas industries. During the process of processing working fluids, various components in the air or feed gas are separated through condensation, compression, etc., to obtain high-purity products such as oxygen, nitrogen, hydrogen, hydrogen, and various alkanes. During the process of processing the working fluid, it is necessary to maintain the environmental temperature under the design conditions, that is, the pipelines and equipment through which the working fluid flows should meet the temperature requirements. Therefore, the cold box has extremely high requirements for cold insulation. However, when the cold box is operating, it will inevitably exchange heat and working fluid with the environment and equipment outside the cold box, and these exchanges mainly occur in the pipeline part. When the pipeline passes through the cold box shell, an opening needs to be made. The prior art usually uses foaming substances to seal the pipeline and prevent direct heat transfer between the pipeline and the cold box shell, or uses heat insulation components. However, due to different coefficients of thermal expansion and contraction and machining dimensional deviations of the components, it may cause mutual extrusion between the components and the pipeline during the operation of the cold box and difficulty in fitting during assembly, thereby resulting in leakage of the heat insulation material inside the cold box shell and a significant increase in the assembly difficulty. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a cold box sealing and cold insulation structure to solve the above technical problems.
[0004] An embodiment of the utility model is realized through the following technical solutions: A cold box sealing and cold insulation structure includes a shell. A through hole is provided on the side wall of the shell. A cold box pipeline is arranged in the through hole. A ring is hermetically arranged outside the through hole. A first heat insulation ring and a second heat insulation ring are hermetically sleeved in the ring. A ring plate is hermetically limited between the first heat insulation ring and the second heat insulation ring. The ring plate does not contact the ring. The cold box pipeline is hermetically connected to the inner ring of the ring plate. An expansion gap is left between both the first heat insulation ring and the second heat insulation ring and the cold box pipeline.
[0005] Further, pressing rings are hermetically fixed at both ends of the ring. Both the first heat insulation ring and the second heat insulation ring are tightly abutted between the pressing rings.
[0006] Further, a sealing gasket is provided between the pressing ring and the first heat insulation ring. The sealing gasket is hermetically arranged inside the ring.
[0007] Further, the cold box pipeline, the first heat insulation ring, the second heat insulation ring, the ring plate, the pressing ring, and the sealing gasket are all coaxially arranged with the ring.
[0008] Further, gaskets are provided between the ring plate and both the first heat insulation ring and the second heat insulation ring.
[0009] The utility model has at least the following advantages and beneficial effects: By sealing and sleeving a ring plate on the outer wall of the cold box pipeline, and then sealing and limiting the ring plate between the first heat insulation plate and the second heat insulation plate, the cold box pipeline is only in direct contact with the ring plate, reducing heat energy conduction and cold quantity loss. Both the first heat insulation ring and the second heat insulation ring have expansion gaps with the cold box pipeline, effectively avoiding extrusion between components. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0011] Figure 1 It is a cross-sectional view of a cold box sealing and cold insulation structure provided by the present utility model;
[0012] Reference numerals: 1 - housing, 10 - through hole, 2 - cold box pipeline, 3 - ring, 30 - expansion gap, 31 - first heat insulation ring, 32 - second heat insulation ring, 33 - ring plate, 34 - pressing ring, 35 - sealing gasket, 36 - gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0014] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0015] Embodiment
[0016] As Figure 1As shown, in this embodiment, a cold box sealing and heat preservation structure is mainly disclosed. The cold box includes a housing 1, the inside of the housing 1 is wrapped with heat insulating material, a through hole 10 is provided on the side wall of the housing 1, and a cold box pipeline 2 is arranged in the through hole 10. The cold box pipeline 2 can be connected to the equipment outside the cold box. In order to reduce the loss of cold quantity, a ring 3 is hermetically arranged outside the through hole 10. A first heat insulating ring 31 and a second heat insulating ring 32 are hermetically sleeved on the ring 3. The first heat insulating ring 31 is arranged at one end close to the housing 1. A ring plate 33 is hermetically limited between the first heat insulating ring 31 and the second heat insulating ring 32. The ring plate 33 does not contact the ring 3. The cold box pipeline 2 is hermetically connected to the inner ring of the ring plate 33. An expansion gap 30 is left between both the first heat insulating ring 31 and the second heat insulating ring 32 and the cold box pipeline 2. It should be noted that the cold box pipeline 2 is only hermetically connected to the ring plate 33 by welding to form a whole. In addition, the cold box pipeline 2 does not directly contact other components. The ring plate 33 is clamped and limited by a first heat insulating plate and a second heat insulating plate and does not directly contact the ring 3. Such a design effectively blocks the heat energy conduction and provides good sealing and heat preservation performance. The material of the ring plate 33 is determined according to the material of the cold box pipeline 2 to ensure sealed welding. An expansion gap 30 is left between both the first heat insulating ring 31 and the second heat insulating ring 32 and the cold box pipeline 2, and neither of them directly contacts the cold box pipeline 2, avoiding extrusion due to thermal expansion and contraction of the first heat insulating ring 31, the second heat insulating ring 32 and the cold box pipeline 2. At the same time, it can ensure smooth assembly and avoid excessive interference caused by dimensional deviation and inability to assemble.
[0017] Furthermore, in specific implementation, pressing rings 34 are hermetically fixed at both ends of the above-mentioned ring 3 provided in the embodiment of the present utility model. Both the first heat insulating ring 31 and the second heat insulating ring 32 are tightly abutted between the pressing rings 34 to ensure the tight abutment of the first heat insulating ring 31 and the second heat insulating ring 32, increasing the stability and durability of the whole cold box. It should be noted that the materials of the pressing rings 34 and the ring 3 are determined according to the material of the housing 1 to ensure sealed welding. A sealing gasket 35 is provided between the pressing ring 34 and the first heat insulating ring 31. The sealing gasket 35 is hermetically arranged inside the ring 3, which can further improve the sealing performance and reduce the loss of cold quantity of the heat insulating material inside the cold box. In addition, the cold box pipeline 2, the first heat insulating ring 31, the second heat insulating ring 32, the ring plate 33, the pressing rings 34 and the sealing gasket 35 are all coaxially arranged with the ring 3.
[0018] Furthermore, in specific implementation, gaskets 36 are provided between the above-mentioned ring plate 33 and the first heat insulating ring 31 and the second heat insulating ring 32 to improve the stability of the structure.
[0019] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A cold box sealing and cold preservation structure, comprising a shell (1), a through hole (10) is opened on the side wall of the shell (1), a cold box pipeline (2) is arranged in the through hole (10), and the characteristics are: The outer side of the through hole (10) is sealed with a ring (3), and the inner sealing sleeve of the ring (3) is provided with a first insulation ring (31) and a second insulation ring (32). A ring plate (33) is provided between the first insulation ring (31) and the second insulation ring (32) for sealing and limiting, and the ring plate (33) does not contact the ring (3). The cold box pipeline (2) is sealed and connected to the inner ring of the ring plate (33), and an expansion gap (30) is left between the first insulation ring (31) and the second insulation ring (32) and the cold box pipeline (2).
2. A cold box sealing and cold preservation structure as claimed in claim 1, characterized in that: Both ends of the ring (3) are sealed and fixed with pressure rings (34), and the first insulation ring (31) and the second insulation ring (32) are tightly abutted between the pressure rings (34).
3. A cold box sealing and cold preservation structure as claimed in claim 2, characterized in that: A sealing gasket (35) is provided between the pressure ring (34) and the first heat-insulating ring (31), and the sealing gasket (35) is sealingly arranged inside the ring (3).
4. A cold box sealing and cold preservation structure as claimed in claim 3, characterized in that: The cold box pipeline (2), the first insulation ring (31), the second insulation ring (32), the ring plate (33), the pressure ring (34) and the sealing gasket (35) are all arranged coaxially with the ring (3).
5. A cold box sealing and cold preservation structure as claimed in claim 1, characterized in that: Gaskets (36) are provided between the ring plate (33) and the first heat-insulating ring (31) and the second heat-insulating ring (32).