CN115163947A - Vacuum sealing pipe joint device for fluid transmission - Google Patents
Vacuum sealing pipe joint device for fluid transmission Download PDFInfo
- Publication number
- CN115163947A CN115163947A CN202210569202.2A CN202210569202A CN115163947A CN 115163947 A CN115163947 A CN 115163947A CN 202210569202 A CN202210569202 A CN 202210569202A CN 115163947 A CN115163947 A CN 115163947A
- Authority
- CN
- China
- Prior art keywords
- pipe
- flange
- vacuum cavity
- inner connecting
- vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/065—Arrangements using an air layer or vacuum using vacuum
Abstract
The invention discloses a vacuum sealing pipe connecting device for fluid transmission, which comprises a vacuum cavity neck pipe, a vacuum cavity neck pipe flange, an inner connecting pipe, a corrugated pipe, a sealing ring, an inner connecting pipe inner flange and a loose flange, wherein one end of the vacuum cavity neck pipe is connected with an external vacuum cavity, the other end of the vacuum cavity neck pipe is connected with the vacuum cavity neck pipe flange, the inner connecting pipe penetrates through the vacuum cavity neck pipe, the corrugated pipe is sleeved on the inner connecting pipe, one end of the corrugated pipe is fixed on the vacuum cavity neck pipe in a sealing mode through the sealing ring, the other end of the corrugated pipe extends into the vacuum cavity neck pipe and is connected with the inner connecting pipe inner flange, the vacuum cavity neck pipe flange and the inner connecting pipe inner flange are both connected with the loose flange, and the inner diameter of the loose flange is larger than the outer diameter of the corrugated pipe. The pipe connecting device has the advantages that the phenomenon that the vacuum neck pipe is water-bonded or frosted due to low temperature is reduced, and the disassembly cost is reduced; and the device is not limited by the operation space in the vacuum cavity, thereby avoiding the situation that the operator enters the cavity to be disconnected and being capable of adapting to the operation in the environment with small space.
Description
Technical Field
The invention relates to the technical field of vacuum, in particular to a vacuum sealing pipe joint device for fluid transmission.
Background
Vacuum insulation is a common insulation method in the engineering field, especially for low temperature environments. With the development of science and technology, the normal temperature or low temperature performance test of the equipment or the sample piece in the vacuum environment is concerned by many science and technology workers or engineers, but no matter the equipment test in the vacuum environment or the low temperature performance test in the vacuum environment, the fluid can be transmitted inside or outside the vacuum cavity.
At present, working media required by the test equipment for transmitting work in a vacuum environment or low-temperature fluid required by low-temperature transmission in the vacuum environment need to be transmitted by designing joints at two sides of a vacuum cavity. Usually, the joint penetrating through the vacuum cavity is directly welded on a flange of a neck pipe of the vacuum cavity, and a movable joint is left on the inner side or the outer side of the cavity or both the inner side and the outer side of the cavity. For example, chinese patent publication No. CN106122609A discloses a fluid feed-through with a double sealing function for a nuclear device, which has a double protection sealing element, and can withstand both high pressure sealing and high vacuum sealing capability, but this type of connection joint requires a part of the length of the pipe inside the cavity to be reserved, and when the equipment in vacuum is removed or disconnected, the neck flange of the vacuum cavity is opened to pull the joint out of the cavity, so that the joint can be disconnected, or an operator enters the vacuum cavity to manually disconnect the joint, but this type of connection joint is not suitable for operation in an environment with a small internal or external space of the vacuum cavity.
In addition, the common joint can cause water or frost formation of a vacuum neck pipe connected with the common joint due to low temperature when transferring the low-temperature fluid, and if the temperature of the low-temperature fluid is below 20K, the sealing form of the flange can only adopt disposable metal sealing with higher cost, and the later disassembly cost is higher.
Disclosure of Invention
The invention aims to provide a vacuum sealing pipe joint device which can adapt to the operation in an environment with small space and reduce the disassembly cost.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a vacuum seal pipe connecting device for fluid transmission, includes vacuum cavity neck, vacuum cavity neck flange, interior union coupling, bellows, sealing ring, inscription intraductal flange and loose flange, external vacuum cavity is connected to vacuum cavity neck one end, and the other end is connected vacuum cavity neck flange, the coaxial vacuum cavity neck that runs through of interior union coupling, the cover is equipped with the bellows on the nipple coupling, the bellows is kept away from the one end of vacuum cavity neck and is passed through the sealing ring and seal the fixing on the vacuum cavity neck, the bellows is close to the one end of vacuum cavity neck and is stretched into inside the vacuum cavity neck and connect inscription intraductal flange, vacuum cavity neck flange and inscription intraductal flange all connect the loose flange, the internal diameter of loose flange is greater than the bellows external diameter, causes the bellows can remove in the loose flange.
The corrugated pipe is fixed on the flange of the vacuum cavity neck pipe through the loop flange, so that the inner connecting pipe is not in direct contact with the vacuum cavity neck pipe, the flange of the vacuum cavity neck pipe, the flange in the inner connecting pipe and the loop flange, the conduction distance from the low-temperature outer wall of the inner connecting pipe to the vacuum cavity neck pipe, the flange of the vacuum cavity neck pipe, the flange in the inner connecting pipe and the loop flange is further increased, the phenomenon that the vacuum cavity neck pipe is watered or frosted due to low temperature is reduced, one-time metal sealing with higher cost is not needed, and the disassembly cost is reduced; and the cold and hot shrinkage of the inner connecting pipe caused by transferring the low-temperature fluid can be compensated through the corrugated pipe, so that the influence of the thermal stress of the inner connecting pipe is reduced.
In addition, because the inner diameter of the loop flange is larger than the outer diameter of the corrugated pipe, the corrugated pipe can move in the loop flange to push the inner connecting pipe, and the corrugated pipe, the sealing ring, the inner connecting pipe inner flange and the loop flange can be driven to move towards the external vacuum cavity, so that the sealing pipe connecting device can move or be disconnected along with the test piece in the cavity, is not limited by the operation space in the vacuum cavity, avoids the situation that an operator enters the cavity to be disconnected, and can adapt to the environment operation with small space.
Preferably, sealing rings are arranged at the joint of the vacuum cavity neck pipe flange and the loop flange and at the joint of the inner connecting pipe flange and the loop flange.
Preferably, the vacuum neck pipe flange and the inner connecting pipe flange are connected with the lap joint flange through bolts.
Preferably, the sealing ring is welded to the bellows at one end and to the inner nipple at the other end.
Preferably, one end of the inner connecting pipe, which is far away from the vacuum cavity neck pipe, is also connected with an outer connecting pipe flange.
Preferably, the outer diameter of the outer flange of the inner connecting pipe is smaller than the inner diameter of the lap joint flange.
Compared with the prior art, the invention has the beneficial effects that:
the corrugated pipe is fixed on the flange of the vacuum cavity neck pipe through the loop flange, so that the inner connecting pipe is not in direct contact with the vacuum cavity neck pipe, the flange of the vacuum cavity neck pipe, the flange in the inner connecting pipe and the loop flange, the conduction distance from the low-temperature outer wall of the inner connecting pipe to the vacuum cavity neck pipe, the flange of the vacuum cavity neck pipe, the flange in the inner connecting pipe and the loop flange is further increased, the phenomenon that the vacuum cavity neck pipe is watered or frosted due to low temperature is reduced, one-time metal sealing with higher cost is not needed, and the disassembly cost is reduced; and the cold and hot shrinkage of the inner connecting pipe caused by transferring the low-temperature fluid can be compensated through the corrugated pipe, so that the influence of the thermal stress of the inner connecting pipe is reduced.
In addition, because the inner diameter of the loop flange is larger than the outer diameter of the corrugated pipe, the corrugated pipe can move in the loop flange to push the inner connecting pipe, and the corrugated pipe, the sealing ring, the inner connecting pipe inner flange and the loop flange can be driven to move towards the external vacuum cavity, so that the sealed pipe connecting device can move or be disconnected along with the test piece in the cavity, is not limited by the operation space in the vacuum cavity, avoids the condition that an operator enters the cavity to be disconnected, and can adapt to the environmental operation with small space.
Drawings
Fig. 1 is a schematic structural view of a vacuum tight pipe joint device for fluid transfer according to an embodiment of the present invention.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless explicitly stated or limited otherwise, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, the embodiment discloses a vacuum sealing pipe joint device for fluid transmission, which includes a vacuum neck pipe 1, a vacuum neck pipe flange 2, an inner connecting pipe 3, a bellows 4, a sealing ring 5, an inner connecting pipe flange 6, a loose flange 7 and an outer connecting pipe flange 8, wherein one end of the vacuum neck pipe 1 is connected to an external vacuum cavity, the outer wall of the other end of the vacuum neck pipe is welded to the vacuum neck pipe flange 2, and the inner connecting pipe 3 coaxially penetrates through the vacuum neck pipe 1.
The inner connecting pipe 3 is sleeved with a corrugated pipe 4, one end of the corrugated pipe 4, close to the vacuum cavity neck pipe 1, extends into the vacuum cavity neck pipe 1, and the outer wall of the end is connected with an inner connecting pipe inner flange 6, so that the vacuum cavity neck pipe 1 is communicated with the corrugated pipe 4. One end, far away from the vacuum cavity neck pipe 1, of the corrugated pipe 4 is hermetically fixed on the vacuum cavity neck pipe 1 through a sealing ring 5, specifically, one end of the sealing ring 5 is fixedly connected on the corrugated pipe 4 through welding, and the other end of the sealing ring is fixedly connected on the inner connecting pipe 3 through welding, so that sealing between the corrugated pipe 4 and the inner connecting pipe 3 is realized.
The vacuum cavity neck pipe flange 2 and the inner connecting pipe inner flange 6 are both connected with the loop flange 7 through bolts, so that one end of the corrugated pipe 4 close to the vacuum cavity neck pipe 1 is connected with the vacuum cavity neck pipe flange 2, and the corrugated pipe 4 is fixed.
And one end of the inner connecting pipe 3, which is far away from the vacuum cavity neck pipe 1, is also connected with an inner connecting pipe outer flange 8 and is used for connecting with an intracavity test piece to form a transmission pipeline of fluid inside and outside the cavity.
The inner diameter of the loop flange 7 is larger than the outer diameter of the corrugated pipe 4 and the inner connecting pipe outer flange 8, so that the corrugated pipe 4 and the inner connecting pipe outer flange 8 can move in the loop flange 7.
The corrugated pipe 4 is fixed on the vacuum cavity neck pipe flange 2 through the loop flange 7, and one end of the corrugated pipe 4, which is far away from the vacuum cavity neck pipe 1, is connected with the inner connecting pipe 3, so that the inner connecting pipe 3 is not in direct contact with the vacuum cavity neck pipe 1, the vacuum cavity neck pipe flange 2, the inner connecting pipe flange 6 and the loop flange 7, the conduction distance from the low-temperature outer wall of the inner connecting pipe 3 to the vacuum cavity neck pipe 1, the vacuum cavity neck pipe flange 2, the inner connecting pipe flange 6 and the loop flange 7 is further increased, the phenomenon that the vacuum cavity neck pipe 1 is water-bonded or frosted due to low temperature is reduced, the disposable metal seal with higher cost is not needed, and the disassembly cost is reduced; the cold and hot shrinkage of the nipple 3 due to the transfer of the cryogenic fluid is also compensated by the bellows 4, reducing its thermal stress effects.
In addition, because the inner diameter of the loop flange 7 is larger than the outer diameter of the corrugated pipe 4 and the inner connecting pipe outer flange 8, the corrugated pipe 4 and the inner connecting pipe outer flange 8 can move in the loop flange 7, after the inner connecting pipe inner flange 6 is detached from the loop flange 7 and the inner connecting pipe outer flange 8 is detached from an external transmission pipeline, the inner connecting pipe 3 is pushed, the corrugated pipe 4, the sealing ring 5, the inner connecting pipe inner flange 6, the loop flange 7 and the inner connecting pipe outer flange 8 can be driven to move towards an external vacuum cavity, the sealing pipe connecting device can move or be disconnected along with an in-cavity test piece, the sealing pipe connecting device is not limited by an operation space in a vacuum cavity, the situation that an operator enters the cavity to be disconnected is avoided, and the sealing pipe connecting device can adapt to the operation in an environment with small space.
Furthermore, sealing rings are arranged at the joint of the vacuum cavity neck pipe flange 2 and the loop flange 7 and the joint of the inner connecting pipe flange 6 and the loop flange 7, so that vacuum sealing of the vacuum cavity neck pipe 1 is guaranteed, and the sealing rings are made of fluororubber or nitrile rubber.
According to the embodiment of the invention, the corrugated pipe 4 is fixed on the vacuum cavity neck pipe flange 2 through the loop flange 7, and one end of the corrugated pipe 4, which is far away from the vacuum cavity neck pipe 1, is connected with the inner connecting pipe 3, so that the inner connecting pipe 3 is not in direct contact with the vacuum cavity neck pipe 1, the vacuum cavity neck pipe flange 2, the inner connecting pipe flange 6 and the loop flange 7, the conduction distance from the low-temperature outer wall of the inner connecting pipe 3 to the vacuum cavity neck pipe 1, the vacuum cavity neck pipe flange 2, the inner connecting pipe flange 6 and the loop flange 7 is further increased, the phenomenon of water or frost formation of the vacuum cavity neck pipe 1 due to low temperature is reduced, a disposable metal seal with higher cost is not required, and the disassembly cost is reduced; the cold and hot shrinkage of the nipple 3 due to the transfer of the cryogenic fluid is also compensated by the bellows 4, reducing its thermal stress effects.
In addition, because the inner diameter of the loop flange 7 is larger than the outer diameter of the corrugated pipe 4 and the inner connecting pipe outer flange 8, the corrugated pipe 4 and the inner connecting pipe outer flange 8 can move in the loop flange 7, the inner connecting pipe inner flange 6 is detached from the loop flange 7, and the inner connecting pipe outer flange 8 is detached from an external transmission pipeline, the inner connecting pipe 3 is pushed, the corrugated pipe 4, the sealing ring 5, the inner connecting pipe inner flange 6, the loop flange 7 and the inner connecting pipe outer flange 8 can be driven to move towards an external vacuum cavity, the sealed pipe connecting device can move or be disconnected with an intracavity test piece, the sealed pipe connecting device is not limited by an operating space in a vacuum cavity, the condition that an operator enters the cavity to be disconnected is avoided, and the sealed pipe connecting device can adapt to the environmental operation with small space.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The above-mentioned embodiments only represent embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit of the present invention, and these embodiments are all within the scope of the present invention.
Claims (6)
1. A vacuum sealed pipe joint device for fluid transmission is characterized in that: the corrugated pipe is fixed on the vacuum cavity neck pipe in a sealing mode through the sealing ring, one end, close to the vacuum cavity neck pipe, of the corrugated pipe extends into the vacuum cavity neck pipe and is connected with the inner connecting pipe flange, the vacuum cavity neck pipe flange and the inner connecting pipe flange are connected coaxially, the inner connecting pipe is sleeved with the corrugated pipe, one end, far away from the vacuum cavity neck pipe, of the corrugated pipe is fixed on the vacuum cavity neck pipe in a sealing mode, the inner connecting pipe flange is connected with the vacuum cavity neck pipe flange, the inner diameter of the movable sleeve flange is larger than the outer diameter of the corrugated pipe, and the corrugated pipe can move in the movable sleeve flange.
2. A vacuum tight pipe joint for fluid transfer according to claim 1, wherein: and sealing rings are arranged at the joint of the vacuum cavity neck pipe flange and the loop flange and at the joint of the inner connecting pipe flange and the loop flange.
3. The vacuum sealed pipe joint for fluid transfer according to claim 1, wherein: the vacuum cavity neck pipe flange and the inner connecting pipe flange are connected with the loop flange through bolts.
4. The vacuum sealed pipe joint for fluid transfer according to claim 1, wherein: one end of the sealing ring is welded on the corrugated pipe, and the other end of the sealing ring is welded on the inner connecting pipe.
5. A vacuum tight pipe joint for fluid transfer according to claim 1, wherein: one end of the inner connecting pipe, which is far away from the vacuum cavity neck pipe, is also connected with an inner connecting pipe outer flange.
6. A vacuum tight pipe joint for fluid transfer according to claim 5, wherein: the outer diameter of the outer flange of the inner connecting pipe is smaller than the inner diameter of the lap joint flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210569202.2A CN115163947A (en) | 2022-05-24 | 2022-05-24 | Vacuum sealing pipe joint device for fluid transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210569202.2A CN115163947A (en) | 2022-05-24 | 2022-05-24 | Vacuum sealing pipe joint device for fluid transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115163947A true CN115163947A (en) | 2022-10-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210569202.2A Withdrawn CN115163947A (en) | 2022-05-24 | 2022-05-24 | Vacuum sealing pipe joint device for fluid transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115163947A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090100805A (en) * | 2008-03-21 | 2009-09-24 | 한국씰마스타주식회사 | Bellows device having duplex structure |
| CN106122609A (en) * | 2016-07-06 | 2016-11-16 | 中国科学院等离子体物理研究所 | A kind of fluid feedthrough component with dual-seal function for nuclear device |
| CN106247065A (en) * | 2016-08-08 | 2016-12-21 | 北京航天试验技术研究所 | A kind of compensate the structure of cryogenic piping temperature stress in vacuum chamber |
| CN206130320U (en) * | 2016-10-28 | 2017-04-26 | 北京中科科美科技股份有限公司 | A sealing member for pipeline runs through structure |
| CN206487952U (en) * | 2017-01-16 | 2017-09-12 | 安徽恒达管业有限责任公司 | A kind of cryogenic delivery pipe road |
| CN208816317U (en) * | 2018-09-11 | 2019-05-03 | 江苏秋林特能装备股份有限公司 | Cryo Heat Insulation pumps pond high-vacuum insulation lid |
| CN110632956A (en) * | 2019-09-01 | 2019-12-31 | 安徽万瑞冷电科技有限公司 | Ultralow temperature environment test device with inner vacuum |
| CN213299198U (en) * | 2020-09-30 | 2021-05-28 | 江苏新宏大集团有限公司 | Inclined branch pipe convenient to disassemble |
| CN113007452A (en) * | 2021-04-27 | 2021-06-22 | 招商局邮轮研究院(上海)有限公司 | LNG dual fuel pipeline heat-insulating watertight flexible cabin penetrating device |
| CN113483198A (en) * | 2021-08-12 | 2021-10-08 | 普乐（合肥）光技术有限公司 | Ultra-low temperature vacuum freezing chamber bellows insulation construction |
| CN114370533A (en) * | 2022-01-10 | 2022-04-19 | 福州大学 | Cabin penetrating pipe fitting with vibration reduction and limiting functions and assembling method |
-
2022
- 2022-05-24 CN CN202210569202.2A patent/CN115163947A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090100805A (en) * | 2008-03-21 | 2009-09-24 | 한국씰마스타주식회사 | Bellows device having duplex structure |
| CN106122609A (en) * | 2016-07-06 | 2016-11-16 | 中国科学院等离子体物理研究所 | A kind of fluid feedthrough component with dual-seal function for nuclear device |
| CN106247065A (en) * | 2016-08-08 | 2016-12-21 | 北京航天试验技术研究所 | A kind of compensate the structure of cryogenic piping temperature stress in vacuum chamber |
| CN206130320U (en) * | 2016-10-28 | 2017-04-26 | 北京中科科美科技股份有限公司 | A sealing member for pipeline runs through structure |
| CN206487952U (en) * | 2017-01-16 | 2017-09-12 | 安徽恒达管业有限责任公司 | A kind of cryogenic delivery pipe road |
| CN208816317U (en) * | 2018-09-11 | 2019-05-03 | 江苏秋林特能装备股份有限公司 | Cryo Heat Insulation pumps pond high-vacuum insulation lid |
| CN110632956A (en) * | 2019-09-01 | 2019-12-31 | 安徽万瑞冷电科技有限公司 | Ultralow temperature environment test device with inner vacuum |
| CN213299198U (en) * | 2020-09-30 | 2021-05-28 | 江苏新宏大集团有限公司 | Inclined branch pipe convenient to disassemble |
| CN113007452A (en) * | 2021-04-27 | 2021-06-22 | 招商局邮轮研究院(上海)有限公司 | LNG dual fuel pipeline heat-insulating watertight flexible cabin penetrating device |
| CN113483198A (en) * | 2021-08-12 | 2021-10-08 | 普乐（合肥）光技术有限公司 | Ultra-low temperature vacuum freezing chamber bellows insulation construction |
| CN114370533A (en) * | 2022-01-10 | 2022-04-19 | 福州大学 | Cabin penetrating pipe fitting with vibration reduction and limiting functions and assembling method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20221011 |