CN107504324B - Construction process of insulating layer of cryogenic pipeline connecting equipment - Google Patents
Construction process of insulating layer of cryogenic pipeline connecting equipment Download PDFInfo
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- CN107504324B CN107504324B CN201710649367.XA CN201710649367A CN107504324B CN 107504324 B CN107504324 B CN 107504324B CN 201710649367 A CN201710649367 A CN 201710649367A CN 107504324 B CN107504324 B CN 107504324B
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- metal outer
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- protective layer
- outer protective
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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
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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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
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a construction process of an insulating layer of kinds of cryogenic pipeline connecting equipment, which comprises the steps of prefabricating insulating blocks according to the size requirement of the equipment, longitudinally pasting the insulating blocks on the surface of the equipment at intervals, spraying foam on the surface of the equipment between the insulating blocks for priming, sequentially installing a metal outer protective layer outside the equipment from bottom to top when the priming thickness reaches 50% of the total thickness, injecting foam in an inner space when layers are installed until the equipment is installed at an end socket of the equipment, and finally spraying foam on the end socket and then installing the metal protective layer to complete the integral installation.
Description
Technical Field
The invention relates to a heat insulation system of cryogenic pipeline connecting equipment, in particular to a construction process of an insulation layer of kinds of cryogenic pipeline connecting equipment.
Background
With the progress of technology and the improvement of human living standard, the application range of cryogenic liquefied substances such as Liquefied Natural Gas (LNG), liquid nitrogen (LN2), liquid oxygen (LO2), liquid carbon dioxide (LCO2), Liquefied Petroleum Gas (LPG) and the like is gradually expanded, particularly LNG mainly comprises methane, LNG is condensed into liquid by cooling gaseous natural gas to-162 ℃ under normal pressure, natural gas can be greatly stored and transported after being liquefied, the liquefied natural gas has the volume of 1/600 which is about the volume of the gaseous state, and the like, LNG is clean and efficient energy sources and is more and more favored as clean energy sources, most countries take LNG as the preferred fuel, the proportion of natural gas in energy supply is rapidly increased, the LNG becomes which is the most rapidly growing energy industry in the world, and the LNG becomes globally competitive thermal energy source commodities after petroleum.
However, cryogenic medium transportation represented by LNG in China still depends on tank trucks or gaseous pipeline transportation, wherein pipelines are common transportation forms, heat preservation treatment is carried out on the surfaces of the pipelines to ensure the heat preservation performance of the pipelines, then auxiliary equipment is connected among the pipelines, and as the auxiliary equipment, heat preservation of the pipelines requires many manufacturers without paying much attention, but actually proves that the heat preservation performance of the equipment has great influence on overall transportation heat preservation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a construction process of an insulating layer of kinds of cryogenic pipeline connecting equipment, realizes heat preservation treatment on the connecting equipment, and ensures the overall heat preservation performance.
In order to achieve the purpose, the invention provides the following technical scheme:
A construction process of an insulating layer of cryogenic pipeline connecting equipment comprises the following steps:
a. determining the size of the prefabricated heat-insulating block according to the size of the equipment and the requirement of the insulation thickness;
b. cleaning the surface of the equipment to ensure that the surface of the equipment is free of oil stains, floating dust and water stains, and then protecting a valve , a pressure gauge and a control console by using a protective film to prevent foam from splashing to cause pollution;
c. drawing prefabricated heat insulation block mounting lines on the surface of equipment according to 60-degree equal divisions of the circumference, longitudinally arranging the mounting lines on the surface of the equipment, then coating deep cold glue on the drawn positions, longitudinally attaching the prefabricated heat insulation blocks, and standing for 60min until the prefabricated heat insulation blocks are cured;
d. spraying foam on the surface of equipment between the prefabricated heat-insulating blocks for priming, wherein the priming thickness is 4-5 mm, and continuously spraying the foam until the foam thickness reaches 50% of the total thickness after the priming layer is cured;
e. the th metal outer protective layer sheet is installed from the bottom of the device, the height of the th metal outer protective layer sheet is 1m, the transverse overlapping width of the th metal outer protective layer sheet is 50mm, after the th metal outer protective layer sheet is installed, foam is injected in a space wrapped by the th metal outer protective layer formed by the th metal outer protective layer sheet, the flow rate and the speed of a spray gun are controlled during injection molding, and it is ensured that no cavity exists in the injection molding space and the th metal outer protective layer is not deformed;
f. then, continuously installing a second metal outer protection layer sheet on the th metal outer protection layer sheet, wherein the longitudinal lap joint width is 30mm, the transverse lap joint width is 50mm, injecting foam into the inner space, and repeating the steps until the end socket position of the equipment;
g. foam spraying is carried out on the end socket, then a stainless steel metal outer protective layer is arranged on the end socket, the gap between the stainless steel metal outer protective layer and the foam is ensured to be less than 2mm, and the stainless steel metal outer protective layer is riveted and fixed through rivets;
h. and the integral insulating layer of the equipment is checked to ensure that no bulge exists and the joint does not deform.
The prefabricated heat-insulating block is made of polyurethane material and has the density of 35-50 kg/m3。
And the metal outer protective layer sheets are fixed in a lap joint manner by rivets or metal sealant.
The metal outer protective layer sheet is stainless steel, aluminum sheet or galvanized iron sheet.
The construction of the insulating layer disclosed by the invention is carried out in the form of injection molding foam, the foam is firstly sprayed to prime, then the metal outer protective layer is wrapped, and then the foam is injected into the inner space of the metal outer protective layer, so that the injection molded foam, the primed foam and the metal outer protective layer are better bonded.
Compared with the prior art, the construction process of the insulating layer of kinds of cryogenic pipeline connecting equipment disclosed by the invention has the following beneficial effects that the construction is carried out in an injection foam form, the whole construction process is quick and simple, the good adhesion between the injection foam and a metal outer protective layer can be realized due to the self-adhesion property of the injection foam, the service life is prolonged, and the insulating property of the equipment is ensured.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention.
The construction process of the insulating layer of kinds of cryogenic pipeline connecting equipment disclosed by the invention comprises the following steps of:
a. determining the size of the prefabricated heat-insulating block according to the size of the equipment and the requirement of the insulation thickness;
b. cleaning the surface of the equipment to ensure that the surface of the equipment is free of oil stains, floating dust and water stains, and then protecting a valve , a pressure gauge and a control console by using a protective film to prevent foam from splashing to cause pollution;
c. drawing prefabricated heat insulation block mounting lines on the surface of equipment according to 60-degree equal divisions of the circumference, longitudinally arranging the mounting lines on the surface of the equipment, then coating deep cold glue on the drawn positions, longitudinally attaching the prefabricated heat insulation blocks, and standing for 60min until the prefabricated heat insulation blocks are cured;
d. spraying foam on the surface of equipment between the prefabricated heat-insulating blocks for priming, wherein the priming thickness is 4-5 mm, and continuously spraying the foam until the foam thickness reaches 50% of the total thickness after the priming layer is cured;
e. the th metal outer protective layer sheet is installed from the bottom of the device, the height of the th metal outer protective layer sheet is 1m, the transverse overlapping width of the th metal outer protective layer sheet is 50mm, after the th metal outer protective layer sheet is installed, foam is injected in a space wrapped by the th metal outer protective layer formed by the th metal outer protective layer sheet, the flow rate and the speed of a spray gun are controlled during injection molding, and it is ensured that no cavity exists in the injection molding space and the th metal outer protective layer is not deformed;
f. then, continuously installing a second metal outer protection layer sheet on the th metal outer protection layer sheet, wherein the longitudinal lap joint width is 30mm, the transverse lap joint width is 50mm, injecting foam into the inner space, and repeating the steps until the end socket position of the equipment;
g. foam spraying is carried out on the end socket until the insulation thickness requirement is met, then a stainless steel metal outer protective layer is arranged on the end socket, the gap between the stainless steel metal outer protective layer and the foam is ensured to be less than 2mm, and the stainless steel metal outer protective layer is riveted and fixed through rivets;
h. and the integral insulating layer of the equipment is checked to ensure that no bulge exists and the joint does not deform.
The metal outer protective layer sheet can be fixed in a lap joint mode through rivets or metal sealant according to field requirements, and adhesive tapes of at least 4mm are extruded out of the lap joint of the metal layer through a glue gun in the sealant fixing mode to achieve bonding.
The metal outer protective layer can be made of stainless steel, aluminum sheet or galvanized sheet iron according to requirements.
The prefabricated heat-insulating block is polyurethane rigid foam, has good mechanical strength, and the performance parameters of the prefabricated heat-insulating block are shown in table 1
Therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but includes various alternatives and modifications without departing from the scope of the present invention, which is defined by the claims of the present patent application.
Claims (4)
1, kinds of cryogenic pipeline connecting equipment insulation layer construction process, which is characterized by comprising the following steps:
a. determining the size of the prefabricated heat-insulating block according to the size of the equipment and the requirement of the insulation thickness;
b. cleaning the surface of the equipment to ensure that the surface of the equipment is free of oil stains, floating dust and water stains, and then protecting a valve , a pressure gauge and a control console by using a protective film to prevent foam from splashing to cause pollution;
c. drawing prefabricated heat insulation block mounting lines on the surface of equipment according to 60-degree equal divisions of the circumference, longitudinally arranging the mounting lines on the surface of the equipment, then coating deep cold glue on the drawn positions, longitudinally attaching the prefabricated heat insulation blocks, and standing for 60min until the prefabricated heat insulation blocks are cured;
d. spraying foam on the surface of equipment between the prefabricated heat-insulating blocks for priming, wherein the priming thickness is 4-5 mm, and continuously spraying the foam until the foam thickness reaches 50% of the total thickness after the priming layer is cured;
e. the th metal outer protective layer sheet is installed from the bottom of the device, the height of the th metal outer protective layer sheet is 1m, the transverse overlapping width of the th metal outer protective layer sheet is 50mm, after the th metal outer protective layer sheet is installed, foam is injected in a space wrapped by the th metal outer protective layer formed by the th metal outer protective layer sheet, the flow rate and the speed of a spray gun are controlled during injection molding, and it is ensured that no cavity exists in the injection molding space and the th metal outer protective layer is not deformed;
f. then, continuously installing a second metal outer protection layer sheet on the th metal outer protection layer sheet, wherein the longitudinal lap joint width is 30mm, the transverse lap joint width is 50mm, injecting foam into the inner space, and repeating the steps until the end socket position of the equipment;
g. foam spraying is carried out on the end socket, then a stainless steel metal outer protective layer is arranged on the end socket, the gap between the stainless steel metal outer protective layer and the foam is ensured to be less than 2mm, and the stainless steel metal outer protective layer is riveted and fixed through rivets;
h. and the integral insulating layer of the equipment is checked to ensure that no bulge exists and the joint does not deform.
2. The construction process of the insulating layer of the cryogenic pipeline connecting equipment according to claim 1, characterized in that: the prefabricated heat-insulating block is made of polyurethane material and has the density of 35-50 kg/m3。
3. The construction process of the insulating layer of the cryogenic pipeline connecting equipment according to claim 1, characterized in that: and the metal outer protective layer sheets are fixed in a lap joint manner by rivets or metal sealant.
4. The construction process of the insulating layer of the cryogenic pipeline connecting equipment according to claim 1, characterized in that: the metal outer protective layer sheet is stainless steel, aluminum sheet or galvanized iron sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710649367.XA CN107504324B (en) | 2017-08-02 | 2017-08-02 | Construction process of insulating layer of cryogenic pipeline connecting equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710649367.XA CN107504324B (en) | 2017-08-02 | 2017-08-02 | Construction process of insulating layer of cryogenic pipeline connecting equipment |
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| CN107504324A CN107504324A (en) | 2017-12-22 |
| CN107504324B true CN107504324B (en) | 2020-01-31 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109000146A (en) * | 2018-07-16 | 2018-12-14 | 酷泰克保温科技江苏有限公司 | A kind of mobile construction method in bank storage tank thermal insulation layer |
| CN110861250A (en) * | 2019-11-21 | 2020-03-06 | 上海宝冶集团有限公司 | Foaming and heat-insulating method for low-temperature working condition refrigeration pipeline |
| CN112524478A (en) * | 2020-12-11 | 2021-03-19 | 酷泰克保温科技江苏有限公司 | Construction process for ultra-large low-temperature liquid-filled insulating layer |
| CN112555672A (en) * | 2020-12-11 | 2021-03-26 | 酷泰克保温科技江苏有限公司 | Manufacturing process of ultra-large low-temperature liquid-filled insulating layer |
| CN112594542A (en) * | 2020-12-11 | 2021-04-02 | 酷泰克保温科技江苏有限公司 | Preparation process of ultra-large low-temperature liquid-filled insulating layer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004238A (en) * | 2006-12-03 | 2007-07-25 | 岑保卫 | Metal insulation layer for equipment and pipe |
| CN203099220U (en) * | 2013-01-15 | 2013-07-31 | 中国寰球工程公司 | Cryogenic-valve cold insulation structure |
| CN203907094U (en) * | 2014-06-30 | 2014-10-29 | 佰焰(天津)燃气科技发展有限公司 | Heat preservation coupling that liquefied natural gas filling station used |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5839053B2 (en) * | 1980-01-10 | 1983-08-27 | 株式会社クボタ | Manufacturing method of thermal insulation tube |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004238A (en) * | 2006-12-03 | 2007-07-25 | 岑保卫 | Metal insulation layer for equipment and pipe |
| CN203099220U (en) * | 2013-01-15 | 2013-07-31 | 中国寰球工程公司 | Cryogenic-valve cold insulation structure |
| CN203907094U (en) * | 2014-06-30 | 2014-10-29 | 佰焰(天津)燃气科技发展有限公司 | Heat preservation coupling that liquefied natural gas filling station used |
Non-Patent Citations (1)
| Title |
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| 设备和管道采用聚氨酯保温的工程施工;李宪光;《冷藏技术》;19910731(第02期);第8-14页 * |
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Effective date of registration: 20221118 Address after: 226,007 Room 1028, No. 188, Jiangguang Road, Suxitong Science and Technology Industrial Park, Nantong City, Jiangsu Province Patentee after: Nantong Fanhao Thermal Insulation Technology Co.,Ltd. Address before: No.999, Guangzhou road, Haimen Economic and Technological Development Zone, Haimen City, Nantong City, Jiangsu Province, 226000 Patentee before: COOL TECH INSULATION JIANGSU CO.,LTD. |
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Effective date of registration: 20230802 Address after: No.999, Guangzhou road, Haimen Economic and Technological Development Zone, Haimen City, Nantong City, Jiangsu Province, 226000 Patentee after: COOL TECH INSULATION JIANGSU CO.,LTD. Address before: 226,007 Room 1028, No. 188, Jiangguang Road, Suxitong Science and Technology Industrial Park, Nantong City, Jiangsu Province Patentee before: Nantong Fanhao Thermal Insulation Technology Co.,Ltd. |