CN114754219B - Novel ice plug jacket device for different pipe diameters - Google Patents
Novel ice plug jacket device for different pipe diameters Download PDFInfo
- Publication number
- CN114754219B CN114754219B CN202210426653.0A CN202210426653A CN114754219B CN 114754219 B CN114754219 B CN 114754219B CN 202210426653 A CN202210426653 A CN 202210426653A CN 114754219 B CN114754219 B CN 114754219B
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- Prior art keywords
- shell
- outer shell
- connecting plate
- inner shell
- pipe diameters
- 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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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 15
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000011551 heat transfer agent Substances 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 235000011089 carbon dioxide Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/103—Means for stopping flow from or in pipes or hoses by temporarily freezing liquid sections in the pipe
-
- 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
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/70—Cooling of pipes or pipe systems
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a novel ice plug jacket device for different pipe diameters, which comprises an upper shell assembly and a lower shell assembly which are symmetrically distributed; the upper shell assembly and the lower shell assembly are fastened through a locking device, and the upper shell assembly comprises an upper outer shell and a plurality of upper inner shells; the upper inner shell is sleeved in the upper outer shell, and the lower shell assembly comprises a lower outer shell and a plurality of lower inner shells; the lower outer shell is sleeved in the lower inner shell, wherein the upper outer shell is connected with the lower outer shell in an adapting way, and the upper inner shell is connected with the lower inner shell in an adapting way; the invention designs a novel ice plug jacket device for different pipe diameters, when an ice plug process is implemented on site, the outer shell of the jacket ice plug device is unchanged, the inner shell is selected along with the pipe diameters of maintenance pipelines, and the novel ice plug jacket device can cope with the conditions of different pipe diameters, so that the maintenance work efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of mechanical assembly, and particularly relates to a novel ice plug jacket device for different pipe diameters.
Background
In a nuclear power plant or a chemical process system, equipment is required to be maintained or replaced when faults occur, and the system is required to be isolated, but some equipment of the system cannot be isolated or equipment faults are isolated, so that the system cannot be isolated; meanwhile, due to economic or safety reasons and the like, the medium in the pipe is difficult to drain or the running requirement is difficult to meet, and in the case, the system isolation by adopting the ice plug is a very feasible method.
The ice plug technology is first in the overhauling field of western countries at the end of the 20 th century, and is widely applied to enterprises such as petrochemical industry, electric power and the like, and several nuclear power plants in China start to apply the technology.
The ice plug technology is to introduce a refrigerant into an ice plug jacket, absorb heat through the phase change of the refrigerant, freeze a medium in a pipeline at the position of the ice plug jacket, and form an ice column capable of bearing a certain pressure, so that the temporary isolation of pipelines is realized, and maintenance work is performed under the condition that other pipelines are not influenced. When the nuclear power, petroleum and chemical pipelines are overhauled, the time of pipeline stoppage directly influences the interests of enterprises, so that the pipeline stoppage needs to be completed rapidly under the working conditions of different pipe diameters.
The common ice plug jacket is generally two symmetrical metal semi-cylinders, has a simple structure, needs to be replaced when facing different pipe diameters, and cannot flexibly cope with complex working conditions; in practical application, the phenomenon that the inner wall of the jacket cannot be in close contact with the outer wall of the pipeline, air exists between gaps, so that the heat transfer efficiency between the jacket and the pipeline is low, on one hand, the loss of liquid nitrogen consumption is serious, on the other hand, the process time of the ice plug is prolonged, and the influence of long-time low temperature on pipeline materials is large.
Therefore, a novel ice plug jacket device for different pipe diameters is designed, and meanwhile, the heat exchange rate between the jacket and the pipe wall is increased, the process efficiency of the ice plug is improved, and the cost of liquid nitrogen is saved.
In view of the above technical problems, improvements are needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a novel ice plug jacket device for different pipe diameters, which has a simple structure and ingenious design; the technical problems that the existing jacket cannot cope with working conditions with variable pipe diameters, the heat transfer efficiency is low and the liquid nitrogen loss is serious are solved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a novel ice plug jacket device for different pipe diameters comprises an upper shell assembly and a lower shell assembly which are symmetrically distributed; the upper shell assembly and the lower shell assembly are fastened through a locking device, and the upper shell assembly comprises an upper outer shell and a plurality of upper inner shells; the upper inner shell is sleeved in the upper outer shell, and the lower shell assembly comprises a lower outer shell and a plurality of lower inner shells; the lower outer shell is sleeved in the lower inner shell, wherein the upper outer shell is connected with the lower outer shell in an adaptive manner, and the upper inner shell is connected with the lower inner shell in an adaptive manner.
As a preferable mode of the present invention, an upper mounting groove for fixing with the upper inner case is formed at both inner ends of the upper outer case; the two outer shells are convenient to assemble with the corresponding inner shells and have sealing effect, and the two ends of the outer shells are provided with bolt holes for fixing.
As a preferable scheme of the invention, the locking device comprises an upper connecting plate arranged on two sides of the upper outer shell and a lower connecting plate arranged on two sides of the lower outer shell, wherein the upper connecting plate and the lower connecting plate are mutually attached, a plurality of bolt holes are arranged on the upper connecting plate and the lower connecting plate along the length direction of the upper connecting plate, and bolts are inserted into the bolt holes for fastening.
As a preferable scheme of the invention, the upper outer shell is fixedly connected with the upper connecting plate and integrally formed; the lower outer shell is fixedly connected with the lower connecting plate and integrally formed; and lower mounting grooves for fixing the lower inner shell are formed at two ends of the inner side of the lower outer shell.
As a preferable scheme of the invention, the upper shell and the lower shell are symmetrical semi-cylinders and are in C-shaped structures, the number of the upper shell and the lower shell is one, and the two shells are arranged in a mirror symmetry mode.
As a preferable scheme of the invention, the upper inner shell and the lower inner shell are symmetrical semi-cylinders and are in a C-shaped structure; the upper inner shell and the lower inner shell are several in number and matched with the pipe diameter.
As a preferable scheme of the invention, the two sides of the upper inner shell are provided with upper end plates, the upper end plates are provided with upper weir plates fixed with the upper outer shell so as to be assembled with the outer shell, the inner surfaces of the upper end plates and the upper outer shell are provided with spiral grooves for leading in a heat conducting agent so as to improve the heat transfer efficiency between the jacket and the pipeline, and the upper end plates at one side are provided with liquid nitrogen inlets.
As a preferable mode of the invention, an upper spiral groove for passing a heat conducting agent is arranged in the upper inner shell.
As a preferable scheme of the invention, the two sides of the lower inner shell are provided with lower end plates, the lower end plates are provided with lower weir plates fixed with the lower outer shell, and the lower end plates at one side of the lower end plates are provided with liquid nitrogen outlets; the liquid nitrogen inlet and the liquid nitrogen outlet are respectively positioned at the outer sides of the end plates of the upper inner shell and the lower inner shell, and are centrosymmetric, so that liquid nitrogen flows in from a low position and flows out from a high position, the heat exchange time is increased, and the liquid nitrogen consumption is reduced.
As a preferable mode of the invention, a lower spiral groove for passing a heat conducting agent is arranged in the lower inner shell.
The beneficial effects of the invention are as follows:
1. the invention designs a novel ice plug jacket device for different pipe diameters, when an ice plug process is implemented on site, the outer shell of the jacket ice plug device is unchanged, the inner shell is selected along with the pipe diameters of maintenance pipelines, and the novel ice plug jacket device can cope with the conditions of different pipe diameters, so that the maintenance work efficiency is improved.
2. The inner wall of the inner shell is provided with the spiral groove for introducing the heat conducting agent, so that the heat transfer efficiency of the jacket and the pipeline can be increased, the consumption of liquid nitrogen is reduced, and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of a novel ice plug jacket apparatus for different pipe diameters according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the whole device structure of the ice plug jacket according to the embodiment of the invention.
Fig. 3 is a cross-sectional view (one) of the entire device of the ice stopper jacket according to an embodiment of the present invention.
Fig. 4 is a cross-sectional view (II) of the entire device of the ice stopper jacket according to the embodiment of the present invention.
Fig. 5 is a front view of the upper outer case of the embodiment of the present invention.
Fig. 6 is a schematic structural view of the lower outer case according to the embodiment of the present invention.
Fig. 7 is a schematic structural view of an upper inner case according to an embodiment of the present invention.
Fig. 8 is a schematic structural view of the lower inner case according to the embodiment of the present invention.
Reference numerals in the drawings: an upper outer housing 1, an upper inner housing 2, a lower inner housing 3, a lower outer housing 4, bolt holes 5, an upper mounting groove 11, an upper end plate 21, an upper weir plate 22, a liquid nitrogen inlet 23, an upper spiral groove 24, a lower end plate 31, a lower weir plate 32, a liquid nitrogen outlet 33, a lower spiral groove 34 and a lower mounting groove 41.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples:
the refrigerants commonly used in the ice plug process are generally liquid nitrogen and liquid carbon dioxide, namely a liquid nitrogen method and a dry ice method; liquid nitrogen processes are typically used for larger diameter (2 "-16") pipes, and dry ice processes are typically used for smaller diameter pipes (2 ") and tubes. There are three preconditions for making ice plugs on system pipes: (1) the temperature of the system medium is lower than 55 ℃; (2) The flow of fluid in the pipe must be zero or near zero; and (3) the pipeline is filled with water.
The invention provides a novel ice plug jacket device for different pipe diameters, which is shown in figures 1-4 and comprises an upper shell assembly and a lower shell assembly which are symmetrically distributed; the upper shell assembly and the lower shell assembly are fastened through a locking device, and the upper shell assembly comprises an upper outer shell 1 and a plurality of upper inner shells 2; the upper inner shell 2 is sleeved in the upper outer shell 1, and the lower shell assembly comprises a lower outer shell 4 and a plurality of lower inner shells 3; the lower outer shell 4 is sleeved in the lower inner shell 3, wherein the upper outer shell 1 is connected with the lower outer shell 4 in an adaptive manner, and the upper inner shell 2 is connected with the lower inner shell 3 in an adaptive manner; the upper outer shell 1 and the lower outer shell 4 are in mirror symmetry, so that the assembly is convenient.
The invention designs a novel ice plug jacket device for different pipe diameters, when an ice plug process is implemented on site, the outer shell of the jacket ice plug device is unchanged, the inner shell is selected along with the pipe diameters of maintenance pipelines, and the novel ice plug jacket device can cope with the conditions of different pipe diameters, so that the maintenance work efficiency is improved.
As shown in fig. 5, bolt holes 5 for connecting with the lower outer casing 4 are provided on both sides of the upper outer casing 1, and upper mounting grooves 11 for fixing with the upper inner casing 2 are provided on both ends of the inner side of the upper outer casing 1, so that on one hand, the upper mounting grooves are connected with the inner and outer casings, and on the other hand, the upper mounting grooves perform a sealing function on liquid nitrogen.
Specifically, locking device is including arranging the upper junction plate on the both sides of upper housing shell 1 and arranging the lower connecting plate on the both sides of lower housing shell 4, and upper junction plate and lower connecting plate laminating each other, and a plurality of bolt holes 5 have been laid along its length direction to upper junction plate and lower connecting plate, and bolt fastening is inserted in bolt hole 5.
As shown in fig. 6, bolt holes 5 for connecting with the upper outer casing 1 are provided on both sides of the lower outer casing 4, lower mounting grooves 41 for fixing with the lower inner casing 3 are formed on both ends of the inner side of the lower outer casing 4, on one hand, the inner and outer casings are connected and matched, and on the other hand, the liquid nitrogen is sealed.
The upper outer shell 1 is fixedly connected with the upper connecting plate and integrally formed; the lower outer shell 4 is fixedly connected with the lower connecting plate and integrally formed; the structural strength and the integral firmness of the whole upper outer shell 1 and the whole lower outer shell 4 are improved, and the use safety is further ensured.
As shown in fig. 7, upper end plates 21 are disposed on both sides of the upper inner housing 2, upper weir plates 22 fixed to the upper outer housing 1 are disposed on the upper end plates 21, liquid nitrogen inlets 23 are disposed on the upper end plates 21 on one side of the upper end plates, and upper spiral grooves 24 for passing a heat transfer agent are disposed inside the upper inner housing 2 so as to enhance heat transfer between the jacket and the pipe.
As shown in fig. 8, the lower end plates 31 are disposed on both sides of the lower inner casing 3, the lower end plates 31 are provided with lower weir plates 32 fixed with the lower outer casing 4, the lower end plates 31 on one side thereof are provided with liquid nitrogen outlets 33, and the lower inner casing 3 is internally provided with lower spiral grooves 34 for passing a heat transfer agent so as to enhance heat transfer between the jacket and the pipeline.
The upper outer shell 1 and the lower outer shell 4 are symmetrical semi-cylinders and are in a C-shaped structure, the number of the upper outer shell and the lower outer shell is one, and the two outer shells are arranged in mirror symmetry; the upper outer shell and the inner wall both sides of the lower outer shell are provided with grooves, so that the upper outer shell and the lower outer shell are convenient to assemble with the corresponding inner shell and play a sealing role, and the two ends of the two outer shells are provided with bolt holes for fixing.
The upper inner shell 2 and the lower inner shell 3 are symmetrical semi-cylinders and are in a C-shaped structure. The upper inner shell 2 and the lower inner shell 3 are several in number and matched with pipe diameters, weirs are arranged at the two end plates of the upper inner shell and the lower inner shell so as to be assembled with the outer shell, and spiral grooves are formed in the inner surfaces of the upper inner shell and the lower inner shell so as to be used for communicating a heat conducting agent, so that the heat transfer efficiency between a jacket and a pipeline is improved.
The novel ice plug jacket device realizes the working condition applicable to various pipe diameters. Firstly, determining the size model of a pipeline subjected to an ice plug process, then selecting a matched jacket inner shell according to the size, wherein the jacket outer shell is of a model which is not required to be changed, firstly assembling two inner shells, secondly assembling two outer shells, the fit between a groove of the outer shells and a weir of the inner shells is required to be assembled, then completely fixing the ice plug jacket on the pipeline through bolts, and finally pumping a heat conducting agent from the bolt groove. From this, the whole set of device accomplishes from the whole process of selecting, assembly, beating the heat transfer agent.
The invention provides a certain convenience for implementing the ice plug process, improves the heat transfer efficiency of the ice plug jacket and the pipe wall, reduces the time for implementing the ice plug process, and provides a design thought for the jacket design development of the ice plug technology.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more herein: the terms upper outer housing 1, upper inner housing 2, lower inner housing 3, lower outer housing 4, bolt holes 5, upper mounting groove 11, upper end plate 21, upper weir 22, liquid nitrogen inlet 23, upper helical groove 24, lower end plate 31, lower weir 32, liquid nitrogen outlet 33, lower helical groove 34, lower mounting groove 41, etc. are not excluded from the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (3)
1. A novel ice plug presss from both sides cover device for different pipe diameters which characterized in that: comprises an upper shell component and a lower shell component which are symmetrically distributed; the upper shell assembly and the lower shell assembly are fastened through a locking device, and the upper shell assembly comprises an upper outer shell (1) and a plurality of upper inner shells (2); the upper inner shell (2) is sleeved in the upper outer shell (1), and the lower shell assembly comprises a lower outer shell (4) and a plurality of lower inner shells (3); the lower outer shell (4) is sleeved outside the lower inner shell (3), wherein the upper outer shell (1) is connected with the lower outer shell (4) in an adapting way, and the upper inner shell (2) is connected with the lower inner shell (3) in an adapting way; the locking device comprises an upper connecting plate and a lower connecting plate, wherein the upper connecting plate is arranged on two sides of the upper outer shell (1), the lower connecting plate is arranged on two sides of the lower outer shell (4), the upper connecting plate and the lower connecting plate are mutually attached, a plurality of bolt holes (5) are formed in the upper connecting plate and the lower connecting plate along the length direction of the upper connecting plate, and bolts are inserted into the bolt holes (5) for fastening; the upper outer shell (1) is fixedly connected with the upper connecting plate and integrally formed; the lower outer shell (4) is fixedly connected with the lower connecting plate and integrally formed; lower mounting grooves (41) used for being fixed with the lower inner shell (3) are formed at two ends of the inner side of the lower outer shell (4); an upper spiral groove (24) for communicating a heat conducting agent is formed in the upper inner shell (2); an upper mounting groove (11) for fixing the upper inner shell (2) is formed at two ends of the inner side of the upper outer shell (1); an upper end plate (21) is arranged on two sides of the upper inner shell (2), an upper weir plate (22) fixed with the upper outer shell (1) is arranged on the upper end plate (21), and a liquid nitrogen inlet (23) is arranged on the upper end plate (21) on one side of the upper weir plate; the two sides of the lower inner shell (3) are provided with lower end plates (31), the lower end plates (31) are provided with lower weir plates (32) fixed with the lower outer shell (4), and the lower end plates (31) at one side are provided with liquid nitrogen outlets (33); the lower inner shell (3) is internally provided with a lower spiral groove (34) for communicating a heat conducting agent.
2. The novel ice-plug jacket device for different pipe diameters according to claim 1, wherein: the upper outer shell (1) and the lower outer shell (4) are symmetrical semi-cylinders and are of C-shaped structures, the number of the upper outer shell and the lower outer shell is one, and the two outer shells are arranged in a mirror symmetry mode.
3. The novel ice-plug jacket device for different pipe diameters according to claim 1, wherein: the upper inner shell (2) and the lower inner shell (3) are symmetrical semi-cylinders and are of C-shaped structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210426653.0A CN114754219B (en) | 2022-04-22 | 2022-04-22 | Novel ice plug jacket device for different pipe diameters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210426653.0A CN114754219B (en) | 2022-04-22 | 2022-04-22 | Novel ice plug jacket device for different pipe diameters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114754219A CN114754219A (en) | 2022-07-15 |
| CN114754219B true CN114754219B (en) | 2023-11-10 |
Family
ID=82331765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210426653.0A Active CN114754219B (en) | 2022-04-22 | 2022-04-22 | Novel ice plug jacket device for different pipe diameters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114754219B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1038181A (en) * | 1996-07-25 | 1998-02-13 | Mitsubishi Heavy Ind Ltd | Ice plug forming device for vertical pipe |
| CN205104243U (en) * | 2015-11-10 | 2016-03-23 | 大亚湾核电运营管理有限责任公司 | Stifled isolation structure of online ice of nuclear power station pipeline |
| CN110440085A (en) * | 2019-08-13 | 2019-11-12 | 西南石油大学 | A kind of temporary block apparatus of gathering line liquid nitrogen cryogenics suitable for multi-pipe-diameter |
| CN110748750A (en) * | 2019-10-30 | 2020-02-04 | 无锡纽思铁科能源科技有限公司 | Double-layer ice plug jacket |
| CN212400310U (en) * | 2020-02-28 | 2021-01-26 | 白银有色长通电线电缆有限责任公司 | Disc cast aluminum heating ring |
| CN216260272U (en) * | 2021-11-26 | 2022-04-12 | 圣奥化学科技有限公司 | Jacket heat preservation in equipment receives groove |
-
2022
- 2022-04-22 CN CN202210426653.0A patent/CN114754219B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1038181A (en) * | 1996-07-25 | 1998-02-13 | Mitsubishi Heavy Ind Ltd | Ice plug forming device for vertical pipe |
| CN205104243U (en) * | 2015-11-10 | 2016-03-23 | 大亚湾核电运营管理有限责任公司 | Stifled isolation structure of online ice of nuclear power station pipeline |
| CN110440085A (en) * | 2019-08-13 | 2019-11-12 | 西南石油大学 | A kind of temporary block apparatus of gathering line liquid nitrogen cryogenics suitable for multi-pipe-diameter |
| CN110748750A (en) * | 2019-10-30 | 2020-02-04 | 无锡纽思铁科能源科技有限公司 | Double-layer ice plug jacket |
| CN212400310U (en) * | 2020-02-28 | 2021-01-26 | 白银有色长通电线电缆有限责任公司 | Disc cast aluminum heating ring |
| CN216260272U (en) * | 2021-11-26 | 2022-04-12 | 圣奥化学科技有限公司 | Jacket heat preservation in equipment receives groove |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114754219A (en) | 2022-07-15 |
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