CN111928055A - Hoop type pipeline reconstruction sealing and plugging process - Google Patents
Hoop type pipeline reconstruction sealing and plugging process Download PDFInfo
- Publication number
- CN111928055A CN111928055A CN202010824015.5A CN202010824015A CN111928055A CN 111928055 A CN111928055 A CN 111928055A CN 202010824015 A CN202010824015 A CN 202010824015A CN 111928055 A CN111928055 A CN 111928055A
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- Prior art keywords
- flange
- leakage
- pressure relief
- bolt
- plugging
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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
- 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
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/17—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose
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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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
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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
- 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
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/175—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by using materials which fill a space around the pipe before hardening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a hoop type pipeline reconstruction sealing plugging process, wherein a to-be-plugged part structure of a pipeline is sequentially a flange I, a cushion block and a flange II, and the process is characterized in that: the method comprises the following steps: s1: leak detection, S2: polishing and cleaning the flange surface, and S3: locking and gluing the bolt, and S4: mounting rubber, S5: installation hoop, S6: gluing and blocking, S7: locking of the pressure relief opening, S8: leak detection after plugging, S9: in the invention, the anchor ear type pipeline reconstruction sealing plugging process is adopted at the position to be plugged of the pipeline connecting flange for sealing and plugging, so that the leakage of gas and liquid in the pipeline is prevented, and the working environment is protected; the bottom and the side of the pressure relief bolt that pressure relief mouth department adopted are seted up and are formed the air guide hole that is L shape, are prevented that the pressure relief bolt from being collapsed by the atmospheric pressure of revealing department when loosening, prevent the damage of pressure relief bolt, protect staff's safety.
Description
Technical Field
The invention relates to the technical field of pipeline leakage plugging, in particular to a hoop type pipeline reconstruction sealing plugging process.
Background
The pipelines with larger diameters are generally connected by flanges, and the flange connections are generally used at the positions of main pipeline connecting valves, check valves, water meters, water pumps and the like and on pipe sections which need to be frequently disassembled and overhauled.
The flange connection is that two pipelines, pipe fittings or equipment are respectively fixed on a flange plate, then a flange pad is added between the two flange plates, and finally the two flange plates are tightly combined by tightening bolts.
When the liquid transmitted in the two pipelines is gas or liquid, the common flange joint cannot ensure the sealing property, and the flange joint needs to be further sealed and plugged.
Disclosure of Invention
The invention aims to provide a hoop type pipeline reconstruction sealing and plugging process, and solves the problem of further sealing and plugging at the flange connection part of two pipelines.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a staple bolt formula pipeline restructuring seals shutoff technology, pipeline treat that shutoff department structure is flange one, cushion, flange two in proper order, its characterized in that: the method comprises the following steps:
s1: and (3) leakage detection: when the liquid leakage exists at the position to be blocked, the leakage position can be visually observed; when the gas leakage exists at the position to be blocked, monitoring the gas leakage position by adopting a soap bubble method or an optical imaging method, and marking the leakage position; s2: polishing and cleaning a flange face: polishing the flange surface and the periphery of the bolt installation position to remove paint on the flange surface, and then cleaning the polished flange surface by adopting cleaning liquid; s3: locking the bolt and gluing: the method comprises the following steps that a first flange, a cushion block and a second flange are pre-locked at a bolt mounting position by matching a long bolt group with a bolt hole, a seal washer and a short bolt group are symmetrically locked on the second flange, the cushion block and the first flange to finish primary plugging, and quick leakage-stopping glue is applied to the surfaces of the long bolt group and the short bolt group and the joint of the long bolt group and the flange I and the flange II;
s4: installing a rubber sheet: opening a pressure relief opening on the rubber, and after the rapid leakage-stopping rubber at the S3 is completely dried, butting and installing the rubber plane on the circumferential surface to be blocked; s5: installing a hoop: two anchor ears are locked on the outer surface of the rubber sheet, and the installation positions of the anchor ears are staggered with the joint seam of the first flange and the cushion block and the joint seam of the cushion block and the second flange; s6: gluing and plugging: fixedly mounting an internal thread hollow column at a pressure relief port on the rubber, drilling rapid leakage-stopping glue on the overall surfaces of the rubber, the hoop, the long bolt group, the short bolt group and the peripheral positions of the internal thread hollow column, and keeping the internal thread hollow column in a ventilation state;
s7: locking a pressure relief opening: after the rapid leakage-blocking glue on the whole surface is dried, locking a pressure relief opening through a pressure relief bolt matched with the internal thread hollow column to complete final sealing; s8: and (3) leak detection after plugging: after the pressure relief hole is locked, detecting leakage of gas by observing the liquid leakage condition or adopting a soap bubble method and an optical imaging method, if leakage exists, repeating the steps from S6 to S7, and if no leakage exists, completing plugging; s9: subsequent protection and cleaning: and after the step of S8 is completed, a layer of anti-aging glue is punched on the outer ring of the quick leakage-blocking glue, the tool is picked up, and the site is cleaned to complete the blocking of the part to be blocked. Further, in the soap foaming method in S1, soap water is sprinkled on the part to be sealed, the part to be sealed is observed, and the position where continuous foaming occurs is the gas leakage position; the optical imaging method performs imaging display for gas leakage through optical imaging, and the leakage position can be directly observed through a display device. Further, the cleaning liquid in S2 is alcohol, and drying of the polished part is accelerated by the characteristic that alcohol is easily evaporated. Furthermore, the bottom and the side of S7 pressure release bolt are seted up and are formed the air guide hole that is L shape, are prevented that the pressure release bolt is blown out by the department of revealing atmospheric pressure when loosening.
The invention has the advantages that:
the anchor ear type pipeline reconstruction sealing and plugging process is adopted at the position to be plugged of the pipeline connecting flange for sealing and plugging, so that gas and liquid in the pipeline are prevented from leaking, and the working environment is protected; the bottom and the side of the pressure relief bolt that pressure relief mouth department adopted are seted up and are formed the air guide hole that is L shape, are prevented that the pressure relief bolt from being collapsed by the atmospheric pressure of revealing department when loosening, prevent the damage of pressure relief bolt, protect staff's safety.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a process flow diagram of the hoop type pipeline reconstruction sealing and plugging process of the present invention.
Fig. 2 is a front view of a pressure relief bolt of the hoop type pipeline reconstruction sealing and plugging process.
Fig. 3 is a cross-sectional view of a pressure relief bolt of the hoop type pipeline reconstruction sealing and plugging process of the invention.
Fig. 4 is a front view of a wind structure of the hoop type pipeline reconstruction sealing and plugging process.
Detailed Description
As shown in fig. 1 to 4, the anchor ear type pipeline reconstruction, sealing and plugging process includes the following steps:
s1: and (3) leakage detection: when the liquid leakage exists at the position to be blocked, the leakage position can be visually observed; when the gas leakage exists at the position to be sealed, the gas leakage position is monitored by a soap bubble method or an optical imaging method, and the leakage position is marked.
The soap bubble method is to sprinkle soap water on the part to be blocked, observe the part to be blocked, and continuously bubble the position, namely the gas leakage position.
The optical imaging method performs imaging display for gas leakage through optical imaging, and the leakage position can be directly observed through a display device. S2: polishing and cleaning a flange face: the periphery of the flange face and the periphery of the bolt mounting position are polished to remove paint on the surface of the flange, then cleaning liquid is adopted to clean the polishing position, and the cleaning liquid can be alcohol and can accelerate the drying of the polishing position through the characteristic that the alcohol is easy to evaporate. S3: locking the bolt 4 and gluing: the long bolt group and the bolt hole are matched to pre-lock the first flange 1, the cushion block 2 and the second flange 3 at the bolt installation position, the sealing washer and the short bolt group are symmetrically locked on the second flange 3, the cushion block 2 and the first flange 1 to complete preliminary plugging, and quick plugging glue is arranged on the surfaces of the long bolt group and the short bolt group and the joints of the first flange and the second flange.
S4: installing a rubber sheet: a pressure relief opening is formed in the rubber 5, and after the rapid leakage-stopping rubber at the position S3 is dried completely, the rubber plane is installed on the circumferential surface to be blocked in a butt joint mode. S5: installing a hoop 6: two anchor ears 6 are locked on the outer surface of the rubber 5, and the installation positions of the anchor ears are staggered with the joint seam of the first flange and the cushion block and the joint seam of the cushion block and the second flange. S6: gluing and plugging: an internal thread hollow column 7 is fixedly installed at a pressure relief opening on the rubber sheet, rapid leakage-stopping glue is applied to the whole surface of the rubber sheet, the hoop, the long bolt group, the short bolt group and the peripheral position of the internal thread hollow column, and the internal thread hollow column is kept in a ventilation state.
S7: locking a pressure relief opening: after the rapid leakage-stopping glue on the whole surface is dried, the pressure-relieving opening is locked by the pressure-relieving bolt 8 in cooperation with the internal thread hollow column 7, and final sealing is completed.
The bottom and the side of the pressure relief bolt 8 are provided with an L-shaped air guide hole 81, so that the pressure at the leakage position is prevented from being burst out when the pressure relief bolt is loosened. S8: and (3) leak detection after plugging: and after the pressure relief hole is locked, detecting the leakage of the liquid or detecting the leakage of the gas by adopting a soap bubble method and an optical imaging method, if the leakage exists, repeating the steps from S6 to S7, and if the leakage does not exist, completing the blocking. S9: subsequent protection and cleaning: and after the step of S8 is completed, a layer of anti-aging glue is punched on the outer ring of the quick leakage-blocking glue, the tool is picked up, and the site is cleaned to complete the blocking of the part to be blocked.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a staple bolt formula pipeline restructuring seals shutoff technology, pipeline treat that shutoff department structure is flange one, cushion, flange two in proper order, its characterized in that: the method comprises the following steps:
s1: and (3) leakage detection: when the liquid leakage exists at the position to be blocked, the leakage position can be visually observed; when the gas leakage exists at the position to be blocked, monitoring the gas leakage position by adopting a soap bubble method or an optical imaging method, and marking the leakage position; s2: polishing and cleaning a flange face: polishing the flange surface and the periphery of the bolt installation position to remove paint on the flange surface, and then cleaning the polished flange surface by adopting cleaning liquid; s3: locking the bolt and gluing: the method comprises the following steps that a first flange, a cushion block and a second flange are pre-locked at a bolt mounting position by matching a long bolt group with a bolt hole, a seal washer and a short bolt group are symmetrically locked on the second flange, the cushion block and the first flange to finish primary plugging, and quick leakage-stopping glue is applied to the surfaces of the long bolt group and the short bolt group and the joint of the long bolt group and the flange I and the flange II;
s4: installing a rubber sheet: opening a pressure relief opening on the rubber, and after the rapid leakage-stopping rubber at the S3 is completely dried, butting and installing the rubber plane on the circumferential surface to be blocked; s5: installing a hoop: two anchor ears are locked on the outer surface of the rubber sheet, and the installation positions of the anchor ears are staggered with the joint seam of the first flange and the cushion block and the joint seam of the cushion block and the second flange; s6: gluing and plugging: fixedly mounting an internal thread hollow column at a pressure relief port on the rubber, drilling rapid leakage-stopping glue on the overall surfaces of the rubber, the hoop, the long bolt group, the short bolt group and the peripheral positions of the internal thread hollow column, and keeping the internal thread hollow column in a ventilation state;
s7: locking a pressure relief opening: after the rapid leakage-blocking glue on the whole surface is dried, locking a pressure relief opening through a pressure relief bolt matched with the internal thread hollow column to complete final sealing; s8: and (3) leak detection after plugging: after the pressure relief hole is locked, detecting leakage of gas by observing the liquid leakage condition or adopting a soap bubble method and an optical imaging method, if leakage exists, repeating the steps from S6 to S7, and if no leakage exists, completing plugging; s9: subsequent protection and cleaning: and after the step of S8 is completed, a layer of anti-aging glue is punched on the outer ring of the quick leakage-blocking glue, the tool is picked up, and the site is cleaned to complete the blocking of the part to be blocked.
2. The flange type pipeline reconstruction, sealing and plugging process according to claim 1, characterized in that: the soap foaming method in the S1 is to sprinkle soap water on the part to be sealed, observe the part to be sealed, and continuously foam the position, namely the gas leakage position; the optical imaging method performs imaging display for gas leakage through optical imaging, and the leakage position can be directly observed through a display device.
3. The flange type pipeline reconstruction, sealing and plugging process according to claim 1, characterized in that: the cleaning liquid in the S2 is alcohol, and drying of the polished part is accelerated by the characteristic that the alcohol is easy to evaporate.
4. The flange type pipeline reconstruction, sealing and plugging process according to claim 1, characterized in that: and the bottom end and the side edge of the S7 pressure relief bolt are provided with an L-shaped air guide hole, so that the pressure relief bolt is prevented from being burst out by air pressure at the leakage position when being loosened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010824015.5A CN111928055A (en) | 2020-08-17 | 2020-08-17 | Hoop type pipeline reconstruction sealing and plugging process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010824015.5A CN111928055A (en) | 2020-08-17 | 2020-08-17 | Hoop type pipeline reconstruction sealing and plugging process |
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| CN111928055A true CN111928055A (en) | 2020-11-13 |
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| CN202010824015.5A Pending CN111928055A (en) | 2020-08-17 | 2020-08-17 | Hoop type pipeline reconstruction sealing and plugging process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477582A (en) * | 2021-08-04 | 2021-10-08 | 江苏迪威高压科技股份有限公司 | Derusting jig for high-pressure pipe connector and using method |
| CN115962369A (en) * | 2022-11-22 | 2023-04-14 | 国网浙江省电力有限公司嘉兴供电公司 | Uninterrupted power reconstruction sealed type leaking stoppage device and sealing method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006064166A (en) * | 2004-08-30 | 2006-03-09 | Chemitec Kk | Oil leakage point sealing method |
| US20120279601A1 (en) * | 2010-01-08 | 2012-11-08 | Kerr Stephen A | Pipe Repair Device |
| CN203099209U (en) * | 2013-01-28 | 2013-07-31 | 江禹 | Gas pipeline leakage gap isobaric electric hot melting plugging mechanism |
| CN104110541A (en) * | 2013-04-19 | 2014-10-22 | 宝山钢铁股份有限公司 | Method and device for plugging leaking point of flange face and sealing gasket of high-pressure equipment |
| CN204592706U (en) * | 2015-05-13 | 2015-08-26 | 隋永波 | Clad type on-line pressure sealant jig |
| CN204828844U (en) * | 2015-08-21 | 2015-12-02 | 重庆地质矿产研究院 | Oxygen bomb air release valve of calorimeter |
| CN205424273U (en) * | 2016-03-16 | 2016-08-03 | 天津市亚普科贸有限公司 | A novel fixture for revealing flange shutoff |
| CN105972375A (en) * | 2016-06-26 | 2016-09-28 | 杨越 | Unmanned shipborne pipeline repairing fixture |
| CN207729133U (en) * | 2017-11-30 | 2018-08-14 | 中国一冶集团有限公司 | Gas medium pipe flange reveals online processing device |
| KR20190032880A (en) * | 2017-09-20 | 2019-03-28 | 삼성중공업 주식회사 | Flange protection cover and installation method thereof |
| CN209892952U (en) * | 2019-04-15 | 2020-01-03 | 新疆八一钢铁股份有限公司 | Low-temperature liquid vacuum pipeline flange joint leakage protection device |
| CN110873255A (en) * | 2019-08-20 | 2020-03-10 | 中海油(福建)应急维修有限责任公司 | Low-temperature pipeline flange cladding device and method |
-
2020
- 2020-08-17 CN CN202010824015.5A patent/CN111928055A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006064166A (en) * | 2004-08-30 | 2006-03-09 | Chemitec Kk | Oil leakage point sealing method |
| US20120279601A1 (en) * | 2010-01-08 | 2012-11-08 | Kerr Stephen A | Pipe Repair Device |
| CN203099209U (en) * | 2013-01-28 | 2013-07-31 | 江禹 | Gas pipeline leakage gap isobaric electric hot melting plugging mechanism |
| CN104110541A (en) * | 2013-04-19 | 2014-10-22 | 宝山钢铁股份有限公司 | Method and device for plugging leaking point of flange face and sealing gasket of high-pressure equipment |
| CN204592706U (en) * | 2015-05-13 | 2015-08-26 | 隋永波 | Clad type on-line pressure sealant jig |
| CN204828844U (en) * | 2015-08-21 | 2015-12-02 | 重庆地质矿产研究院 | Oxygen bomb air release valve of calorimeter |
| CN205424273U (en) * | 2016-03-16 | 2016-08-03 | 天津市亚普科贸有限公司 | A novel fixture for revealing flange shutoff |
| CN105972375A (en) * | 2016-06-26 | 2016-09-28 | 杨越 | Unmanned shipborne pipeline repairing fixture |
| KR20190032880A (en) * | 2017-09-20 | 2019-03-28 | 삼성중공업 주식회사 | Flange protection cover and installation method thereof |
| CN207729133U (en) * | 2017-11-30 | 2018-08-14 | 中国一冶集团有限公司 | Gas medium pipe flange reveals online processing device |
| CN209892952U (en) * | 2019-04-15 | 2020-01-03 | 新疆八一钢铁股份有限公司 | Low-temperature liquid vacuum pipeline flange joint leakage protection device |
| CN110873255A (en) * | 2019-08-20 | 2020-03-10 | 中海油(福建)应急维修有限责任公司 | Low-temperature pipeline flange cladding device and method |
Non-Patent Citations (1)
| Title |
|---|
| 钟红光: "上海天然气高压管线急抢修技术的现状及发展", 《上海煤气》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477582A (en) * | 2021-08-04 | 2021-10-08 | 江苏迪威高压科技股份有限公司 | Derusting jig for high-pressure pipe connector and using method |
| CN113477582B (en) * | 2021-08-04 | 2024-03-01 | 江苏迪威高压科技股份有限公司 | Rust removal jig for high-pressure pipe fitting connector and use method |
| CN115962369A (en) * | 2022-11-22 | 2023-04-14 | 国网浙江省电力有限公司嘉兴供电公司 | Uninterrupted power reconstruction sealed type leaking stoppage device and sealing method thereof |
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Application publication date: 20201113 |
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