CN219432793U

CN219432793U - Vacuum heat insulation connection structure for cryogenic liquid

Info

Publication number: CN219432793U
Application number: CN202320203810.1U
Authority: CN
Inventors: 谭义
Original assignee: Chengdu Vigor Cryogenic Equipment Co ltd
Current assignee: Chengdu Vigor Cryogenic Equipment Co ltd
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-07-28
Anticipated expiration: 2033-02-09

Abstract

The utility model provides a vacuum heat insulation connection structure for cryogenic liquid, which comprises a first inner pipe and a second inner pipe connected with the first inner pipe, wherein the first inner pipe and the second inner pipe are respectively sleeved with a first outer pipe and a second outer pipe, both ends of the first inner pipe extend out of the end face of the first outer pipe, both ends of the second inner pipe extend out of the end face of the second outer pipe, a heat preservation cylinder is arranged at the joint of the first inner pipe and the second inner pipe, and both ends of the heat preservation cylinder are respectively connected with the first outer pipe and the second outer pipe. According to the utility model, the first outer pipe and the second outer pipe are respectively sleeved on the first inner pipe and the second inner pipe, and the heat preservation cylinder is arranged at the joint of the first inner pipe and the second inner pipe, so that the purposes of heat preservation and heat insulation are achieved, the phenomenon of frosting and icing of the whole transportation pipe at the joint of the pipelines can be avoided, and the minimum cold loss of transportation media is ensured.

Description

Vacuum heat insulation connection structure for cryogenic liquid

Technical Field

The utility model relates to the technical field of cryogenic liquid conveying, in particular to a vacuum heat insulation connecting structure for cryogenic liquid.

Background

Cryogenic, generally referred to as the warm region range of 233K-77K. 233K (about-40 ℃) is generally the lower temperature limit that can be effectively reached by single-stage vapor compression refrigeration, and 77K (about-196 ℃) is the atmospheric boiling point temperature of liquid nitrogen. Liquefied gases having a boiling point below 120K are commonly referred to as cryogenic liquids and may be liquid nitrogen or liquid argon, hydrogen, helium, neon, methane, carbon monoxide and the like.

In the prior art, in the transportation process of cryogenic liquid, because most of cryogenic liquid is long-distance transportation, the problem of overlong transportation distance exists, and a plurality of transportation pipes are connected together in a pieced mode to form a transportation pipeline capable of meeting long-distance transportation. However, in the mode that a long conveying pipeline is formed by connecting a plurality of conveying pipes, the problem that the connection between the conveying pipes is not tight exists, so that loss of conveying media in the conveying pipes can be caused, and the conveying efficiency of cryogenic liquid is reduced.

Disclosure of Invention

The utility model aims to provide a vacuum heat insulation connection structure for cryogenic liquid, which is used for solving the technical problem that in the transportation process of the cryogenic liquid in the prior art, the connection part of a transportation pipe and the transportation pipe is not tight, and the transportation medium loss in the transportation pipe is easy to cause.

In order to achieve the above object, in one embodiment of the present utility model, a vacuum insulation connection structure for cryogenic liquid is provided, which includes a first inner tube and a second inner tube connected to the first inner tube, wherein the first inner tube and the second inner tube are respectively sleeved with a first outer tube and a second outer tube, both ends of the first inner tube extend out of an end face of the first outer tube, both ends of the second inner tube extend out of an end face of the second outer tube, a thermal insulation tube is disposed at a connection position of the first inner tube and the second inner tube, and both ends of the thermal insulation tube are respectively connected to the first outer tube and the second outer tube.

In order to solve the problem that the heat preservation cylinder is inconvenient to install, the heat preservation cylinder is preferably provided with a plurality of filling ports, one filling port is connected with a safety valve, and each filling port is provided with a cover plate for sealing the filling port.

Preferably, the safety valve is connected to the cover plate above the filling opening by a pipe.

Preferably, the heat preservation cylinder is made of pearlitic sand.

Preferably, the first outer tube is provided with a vacuum nozzle.

Preferably, the first inner tube and the second inner tube are connected by welding.

Preferably, the first outer tube is provided with a welding plate.

In summary, the beneficial effects of the utility model are as follows:

1. according to the vacuum heat insulation connecting structure, the first outer pipe and the second outer pipe are respectively sleeved on the first inner pipe and the second inner pipe, and the heat insulation cylinder is arranged at the joint of the first inner pipe and the second inner pipe, so that the purposes of heat insulation and heat insulation are achieved, the phenomenon of frosting and icing of the whole transportation pipe at the joint of the pipelines can be avoided, and the minimum cold loss of transportation media is further ensured.

2. The heat preservation cylinder is provided with a plurality of filling openings, and each filling opening is provided with a cover plate for sealing the filling opening. The filling port is arranged for filling the pearly-luster sand into the heat preservation cylinder, so that the purposes of heat preservation and heat insulation are achieved, and meanwhile, the filling port is also provided with a cover plate which is used for sealing the filling port and preventing the pearly-luster sand in the heat preservation cylinder from leaking out.

3. One of the filling ports on the heat preservation cylinder is connected with a safety valve. A safety valve is arranged for preventing the inner cylinder from being boosted due to leakage of the inner tube.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

The device comprises a first inner pipe, a second inner pipe, a first outer pipe, a second outer pipe, a heat-preserving cylinder, a filling port, a safety valve, a cover plate, a vacuum nozzle and a welding plate, wherein the first inner pipe, the second inner pipe, the first outer pipe, the second outer pipe, the heat-preserving cylinder, the filling port, the safety valve, the cover plate, the vacuum nozzle and the welding plate are sequentially arranged in sequence, and the welding plate is sequentially arranged in sequence.

Detailed Description

The utility model provides a vacuum heat insulation connection structure for cryogenic liquid, which comprises a first inner pipe 1 and a second inner pipe 2 connected with the first inner pipe 1, wherein the first inner pipe 1 and the second inner pipe 2 are connected in a welding mode.

The first inner tube 1 and the second inner tube 2 are respectively sleeved with the first outer tube 3 and the second outer tube 4, and the two ends of the first inner tube 1 extend out of the end face of the first outer tube 3, the two ends of the second inner tube 2 extend out of the end face of the second outer tube 4, namely, the length of the first inner tube 1 is longer than that of the first outer tube 3, and the length of the second inner tube 2 is longer than that of the second outer tube 4. The first inner tube 1, the second inner tube 2, the first outer tube 3 and the second outer tube 4 are vacuum insulated tubes.

The junction of first inner tube 1 and second inner tube 2 is provided with a heat preservation section of thick bamboo 5, and the both ends of heat preservation section of thick bamboo 5 are connected with first outer tube 3 and second outer tube 4 respectively. The heat preservation section of thick bamboo 5 is provided with a plurality of filling openings 6, and filling opening 6 is used for filling pearly-lustre sand into heat preservation section of thick bamboo 5, and then reaches heat preservation adiabatic purpose. The heat preservation cylinder 5 is made of pearlitic sand, which is a porous white and granular loose material prepared from acidic volcanic vitreous lava through crushing, preheating, roasting and expanding, and has the advantages of small capacity, low heat conductivity, good chemical stability, incombustibility, no toxicity, no smell, sound absorption and the like.

One of the filling ports 6 is connected with a safety valve 7, and the safety valve 7 is connected with a cover plate 8 above the filling port 6 through a pipeline. A safety valve 7 is provided for preventing the inner tube from being pressurized due to leakage of the inner tube. Meanwhile, each filling port 6 is provided with a cover plate 8 for sealing the filling port 6, and the cover plates 8 are fixed on the filling ports 6 in a welding mode. The cover plate 8 is used for sealing the filling opening 6 and preventing the pearly-luster sand in the heat preservation cylinder 5 from leaking out.

The first outer tube 3 is provided with a vacuum nozzle 9. The vacuum nozzle 9 is used for completing vacuumizing, and the pipeline is used for evacuating all molecules in the space through the vacuum nozzle 9, so that the aim of reducing convection heat transfer is fulfilled.

And a welding plate 10 is further arranged at one end, close to the vacuum nozzle 9, of the first outer tube 3, and the welding plate 10 plays a role in welding and heat preservation when being used for field installation.

Working principle: according to the connecting structure, the first outer pipe 3 and the second outer pipe 4 are sleeved on the first inner pipe 1 and the second inner pipe 2 respectively, and the heat preservation cylinder 5 is arranged at the joint of the first inner pipe 1 and the second inner pipe 2, so that the purposes of heat preservation and heat insulation are achieved, the phenomenon of frosting and icing of the whole transportation pipe at the joint of pipelines can be avoided, and the minimum cold loss of transportation media is further ensured.

The installation process comprises the following steps: firstly, respectively welding a first inner pipe 1 sleeved with a first appearance and a second inner pipe 2 sleeved with a second outer pipe 4, then welding a heat preservation cylinder 5 at the joint of the first inner pipe 1 and the second inner pipe 2, filling pearly-luster sand through a filling opening 6 on the heat preservation cylinder 5, and finally welding a cover plate 8 on the filling opening 6, thereby completing the whole installation process.

Although specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.

Claims

1. A vacuum insulation connection structure for cryogenic liquid, its characterized in that: the heat-insulating pipe comprises a first inner pipe and a second inner pipe connected with the first inner pipe, wherein the first inner pipe and the second inner pipe are respectively sleeved with a first outer pipe and a second outer pipe, both ends of the first inner pipe extend out of the end face of the first outer pipe, both ends of the second inner pipe extend out of the end face of the second outer pipe, a heat-insulating cylinder is arranged at the joint of the first inner pipe and the second inner pipe, and both ends of the heat-insulating cylinder are respectively connected with the first outer pipe and the second outer pipe;

and a welding plate is arranged on the first outer tube.

2. The vacuum insulation connection structure for cryogenic liquids as claimed in claim 1, wherein: the heat preservation cylinder is provided with a plurality of filling openings, one filling opening is connected with a safety valve, and each filling opening is provided with a cover plate for sealing the filling opening.

3. A vacuum insulation connection for cryogenic liquids as claimed in claim 2, wherein: the safety valve is connected with the cover plate above the filling port through a pipeline.

4. A vacuum insulation connection structure for cryogenic liquids as claimed in claim 1 or 2, characterized in that: the heat preservation cylinder is made of pearlitic sand.

5. The vacuum insulation connection structure for cryogenic liquids as claimed in claim 1, wherein: the first outer tube is provided with a vacuum nozzle.

6. The vacuum insulation connection structure for cryogenic liquids as claimed in claim 1, wherein: the first inner tube and the second inner tube are connected in a welding mode.