CN114165674A - Non-open-fire leakage blocking method for ammonia refrigeration pipeline - Google Patents
Non-open-fire leakage blocking method for ammonia refrigeration pipeline Download PDFInfo
- Publication number
- CN114165674A CN114165674A CN202111415722.XA CN202111415722A CN114165674A CN 114165674 A CN114165674 A CN 114165674A CN 202111415722 A CN202111415722 A CN 202111415722A CN 114165674 A CN114165674 A CN 114165674A
- Authority
- CN
- China
- Prior art keywords
- leakage
- ammonia refrigeration
- leak
- plugging
- pipeline
- 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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Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 41
- 238000005057 refrigeration Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000000903 blocking effect Effects 0.000 title claims description 7
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 238000010079 rubber tapping Methods 0.000 claims abstract description 9
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000004880 explosion Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
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
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/1612—Devices for covering leaks in pipes or hoses, e.g. hose-menders by means of a plug
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention belongs to the technical field of ammonia refrigeration pipeline leakage stoppage, and relates to a non-open-fire leakage stoppage method for an ammonia refrigeration pipeline. When a tiny leak point appears on the ammonia refrigeration system pipeline and leak stopping operation is needed, firstly drilling and tapping are carried out at the leak point, and internal threads are formed; screwing a leak source plugging bolt and a leak source plugging sealing gasket in the thread at the leak source after drilling and tapping; the two semi-circular pipe clamps are matched and pressed on the upper part of the leak point plugging screw plug relatively, two ends connected with the two semi-circular pipe clamps are locked through bolts, spring pads and nuts respectively, the leak point plugging bolt is further pressed, and the leak point plugging is completed. The method does not need to weld open fire when maintaining and repairing the tiny leakage points of the ammonia refrigeration pipeline, thereby avoiding the risk of explosion accidents caused by the occurrence of open fire of residual oil ammonia mixture due to incomplete emptying of the ammonia refrigeration pipeline; therefore, the safety of emergency repair is improved, and the maintenance time and cost of the leakage point of the ammonia refrigeration pipeline are saved.
Description
Technical Field
The invention belongs to the field of maintenance and emergency repair methods for ammonia refrigeration pipelines, and relates to a leakage stopping method for maintaining and emergency repairing pipe clamps of tiny leakage points on refrigeration house ammonia refrigeration system pipelines in the food cold chain logistics industry or meeting non-welding repair requirements.
Background
The ammonia refrigeration system pipeline internal conveying refrigerant ammonia belongs to toxic, inflammable and explosive working media, and according to GB50072-2010 refrigeration house design specifications, an ammonia refrigeration pipeline pipe adopts a GB/T8163 seamless steel pipe, and the design pressure of the high pressure side of an ammonia refrigeration pressure pipeline is 2.0Mpa, and the design pressure of the low pressure side of the ammonia refrigeration pressure pipeline is 1.5 Mpa. After a certain period of operation of the refrigeration house, the conditions of sand holes, needle-shaped small holes and the like of parent materials of individual ammonia refrigeration pipelines and welding lines are often met. After the leakage point of the pipeline is enlarged, accidents such as personnel poisoning or fire, explosion and the like are easy to happen.
At present, the conventional treatment generally needs to stop production and empty the ammonia refrigeration pipeline at a section to be maintained, and the leakage point can be welded and blocked under the premise of connecting the atmosphere; however, for an old system with a long pipeline, oil is easy to accumulate in the pipe wall, and the emptying time is long, so that the refrigerating system has long cold stopping time, and goods in a cold storage are easy to deteriorate; if the air is not completely discharged, the oil-ammonia mixture is exposed to electric welding naked flame, so that explosion accidents are easily caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the method for stopping the leakage of the ammonia refrigeration pipeline without open fire, so that the leakage of the ammonia refrigeration pipeline is stopped without electric welding during maintenance and rush repair, the risk of welding leakage accidents is avoided, and the maintenance time and the maintenance cost are saved.
The technical scheme of the invention is as follows:
an ammonia refrigeration pipeline open fire-free leaking stoppage method comprises the following steps:
and 3, the two semi-circular pipe clamps are oppositely matched and tightly pressed on the upper part of the leak point plugging screw plug, two connected ends of the two semi-circular pipe clamps are respectively locked through bolts, spring pads and nuts, the leak point plugging bolt is further tightly pressed, and the leak point plugging is completed.
Preferably, step 1 is to drill and tap the entire pipe wall thickness.
Preferably, in the step 2, the leak plugging bolt penetrates through the pipe wall after being screwed tightly but does not touch the pipe wall on the other side.
The invention has the advantages that the leakage point plugging bolt and the leakage point plugging sealing gasket are directly arranged at the leakage point of the ammonia refrigeration pipeline of the food cold chain refrigerator, the leakage point plugging bolt and the leakage point plugging sealing gasket are arranged in the thread drilled and tapped at the leakage point of the ammonia refrigeration pipeline, and the leakage point of the ammonia refrigeration pipeline is plugged by the leakage point plugging bolt and the leakage point plugging sealing gasket. The whole leaking stoppage process is sealed by a leaking point plugging bolt and the leaking point plugging sealing gasket; because the method of bolts and fixed pipe clamps is adopted for plugging, the method has no influence on the safety of a small amount of oil-ammonia mixture remained in the ammonia refrigeration pipeline, so that the plugging operation can be carried out without nitrogen purging replacement and welding, the explosion risk of electric welding and welding plugging operation open fire due to incomplete emptying of the oil-ammonia mixture of the ammonia refrigeration pipeline can be avoided, the maintenance and first-aid repair period can be shortened, and the cost can be saved.
Drawings
Fig. 1 is a schematic view of a plugging state of a preferred embodiment of the method for plugging an ammonia refrigeration pipeline without open flame according to the invention.
In the figure: 1, semi-circular pipe clamp; 2, bolts; 3, a nut; 4, a spring cushion; 5, plugging bolts at leakage points; 6, sealing gaskets are sealed by leakage points; 7 ammonia refrigeration pipeline.
Detailed Description
Further advantages and features of the invention are illustrated by the following description of embodiments of the invention, given by way of example and not of limitation, with reference to the accompanying drawings, in which:
an ammonia refrigeration pipeline open fire-free leaking stoppage method comprises the following steps:
and step 3, the two semi-circular pipe clamps 1 are oppositely matched and tightly pressed on the upper part of the leak source plugging screw plug 5, two connected ends of the two semi-circular pipe clamps 1 are respectively locked through the bolt 2, the spring pad 4 and the nut 3, the leak source plugging bolt 5 is further tightly pressed, and the leak source plugging is completed.
The semi-circular pipe clamp is 2 mm.
The leak source plugging screw plug is made of carbon steel or stainless steel.
The leak source plugging sealing gasket is a tetrafluoro gasket.
Although the present invention has been described in terms of the preferred embodiments, it is not intended that the scope of the invention be limited to the exact construction described above, and equivalent alternate constructions will occur to those skilled in the art upon reading the foregoing description and are intended to be encompassed by the present invention unless they depart from the spirit and scope of the invention.
Claims (6)
1. The method for stopping the leakage of the ammonia refrigeration pipeline without open fire is characterized by comprising the following steps of:
step 1, when a tiny leak point appears on an ammonia refrigeration system pipeline and leak stopping operation is needed, drilling and tapping are performed at the leak point, and internal threads are formed;
step 2, screwing a leakage point plugging bolt (5) and a leakage point plugging sealing gasket (6) in the thread at the leakage point after drilling and tapping in the step 1;
and 3, the two semi-circular pipe clamps (1) are matched and pressed on the upper part of the leak source plugging screw plug (5) relatively, the two connected ends of the two semi-circular pipe clamps (1) are locked through the bolt (2), the spring pad (4) and the nut (3) respectively, the leak source plugging bolt (5) is further pressed, and the leak source plugging is completed.
2. The method for stopping the leakage of the ammonia refrigeration pipeline without the open fire as recited in claim 1, wherein in the step 1, drilling and tapping are performed on the whole wall thickness of the pipeline.
3. The ammonia refrigeration pipeline open-fire-free leakage blocking method as defined in claim 1, wherein in step 2, the leakage point blocking bolt (5) penetrates through the pipe wall without touching the pipe wall on the other side after being screwed tightly.
4. The ammonia refrigeration pipeline open-fire-free leakage blocking method as recited in claim 1, wherein the thickness of the semi-circular pipe clamp is 2 mm.
5. The ammonia refrigeration pipeline open-fire-free leakage blocking method as claimed in claim 1, wherein the leakage point blocking bolt (5) is made of carbon steel or stainless steel.
6. The method for stopping the leakage of the ammonia refrigeration pipeline without open fire according to claim 1, wherein the leakage point stopping sealing gasket (6) is a tetrafluoro gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111415722.XA CN114165674B (en) | 2021-11-25 | 2021-11-25 | Ammonia refrigeration pipeline open-flame-free plugging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111415722.XA CN114165674B (en) | 2021-11-25 | 2021-11-25 | Ammonia refrigeration pipeline open-flame-free plugging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114165674A true CN114165674A (en) | 2022-03-11 |
| CN114165674B CN114165674B (en) | 2024-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111415722.XA Active CN114165674B (en) | 2021-11-25 | 2021-11-25 | Ammonia refrigeration pipeline open-flame-free plugging method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114165674B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09210285A (en) * | 1996-02-07 | 1997-08-12 | Osaka Gas Co Ltd | Leak hole closing method |
| KR200248105Y1 (en) * | 2001-06-19 | 2001-10-18 | 포항종합제철 주식회사 | Apparatus for preventing leakage from broken hole of pipe arrangement |
| CN202176875U (en) * | 2011-08-25 | 2012-03-28 | 天津绿清管道科技发展有限公司 | Thimble leakage blocking body and pipeline rush-repair fixture for pipeline rush-repair |
| CN204739362U (en) * | 2015-06-19 | 2015-11-04 | 中国石油天然气第一建设公司 | Reserve quick leaking stoppage ware |
| CN205424275U (en) * | 2016-03-24 | 2016-08-03 | 绍兴柯桥滨海供水有限公司 | Pipeline leakage point welding device |
| CN108843889A (en) * | 2018-06-29 | 2018-11-20 | 浙江海洋大学 | Ocean gas transmission metallic conduit restorative procedure |
| CN210950418U (en) * | 2019-10-10 | 2020-07-07 | 中国石油化工股份有限公司 | Self-pressure-release type steel pipeline plugging device |
| CN214305894U (en) * | 2020-11-25 | 2021-09-28 | 东营市诺信石油科技有限公司 | Tapping type red copper quick leaking stoppage hollow screw |
-
2021
- 2021-11-25 CN CN202111415722.XA patent/CN114165674B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09210285A (en) * | 1996-02-07 | 1997-08-12 | Osaka Gas Co Ltd | Leak hole closing method |
| KR200248105Y1 (en) * | 2001-06-19 | 2001-10-18 | 포항종합제철 주식회사 | Apparatus for preventing leakage from broken hole of pipe arrangement |
| CN202176875U (en) * | 2011-08-25 | 2012-03-28 | 天津绿清管道科技发展有限公司 | Thimble leakage blocking body and pipeline rush-repair fixture for pipeline rush-repair |
| CN204739362U (en) * | 2015-06-19 | 2015-11-04 | 中国石油天然气第一建设公司 | Reserve quick leaking stoppage ware |
| CN205424275U (en) * | 2016-03-24 | 2016-08-03 | 绍兴柯桥滨海供水有限公司 | Pipeline leakage point welding device |
| CN108843889A (en) * | 2018-06-29 | 2018-11-20 | 浙江海洋大学 | Ocean gas transmission metallic conduit restorative procedure |
| CN210950418U (en) * | 2019-10-10 | 2020-07-07 | 中国石油化工股份有限公司 | Self-pressure-release type steel pipeline plugging device |
| CN214305894U (en) * | 2020-11-25 | 2021-09-28 | 东营市诺信石油科技有限公司 | Tapping type red copper quick leaking stoppage hollow screw |
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| Publication number | Publication date |
|---|---|
| CN114165674B (en) | 2024-07-02 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240605 Address after: Room 606, No. 39-1, Chuangxin Second Road, Shenyang area, China (Liaoning) pilot Free Trade Zone, Shenyang, Liaoning 110167 Applicant after: Yidu (Shenyang) Cold Chain Logistics Development Co.,Ltd. Country or region after: China Address before: 116000 No. 7-2, gangsan Road, Dalian Bonded Logistics Park, Liaoning Province Applicant before: Dalian Port Yidu cold chain Co.,Ltd. Country or region before: China |
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| GR01 | Patent grant |