CN107246529A - The online hatch method of natural gas line - Google Patents
The online hatch method of natural gas line Download PDFInfo
- Publication number
- CN107246529A CN107246529A CN201710509036.6A CN201710509036A CN107246529A CN 107246529 A CN107246529 A CN 107246529A CN 201710509036 A CN201710509036 A CN 201710509036A CN 107246529 A CN107246529 A CN 107246529A
- Authority
- CN
- China
- Prior art keywords
- natural gas
- pipeline
- gas line
- downstream
- plugging device
- 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.)
- Pending
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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
- F16L55/1608—Devices for covering leaks in pipes or hoses, e.g. hose-menders by replacement of the damaged part of 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
- 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 present invention discloses a kind of online hatch method of natural gas line, comprises the following steps：At the air-leak section for determining natural gas line and the replacing for determining the natural gas line to be changed, and determine the pipeline internal transmission pressure of the natural gas line, determine transmission route and the upstream and downstream user of pipeline, amount of natural gas needed for user is determined, the minimum time of amount of natural gas needed for selection, the short online opening for carrying out natural gas line was changed.The construction method of the present invention is not influence the permission highest of downstream line user's request to block under pressure, press and open holes, plugging device is installed after perforate, start to block operation, carry out nitrogen displacement after the completion of new old pipeline connection, release closure, successively unload upstream and downstream plugging device, bypass pipe is removed, then recovers original equipment, pipeline medium, the leakage of pumped (conveying) medium and the interruption of pipeline transportation to prevent；Whole process easy construction, difficulty of construction is relatively low, and does not influence the use of user along pipeline, very convenient.
Description
Technical field
Field, the specifically online hatch method of natural gas line are changed the present invention relates to pipeline tapping.
Background technology
Natural gas line use time too long when, easily there are the various situations such as pipeline breaking or pipeline gas leakage
Occur；And need along pipeline to be stopped with gas unit while needing online opening to change natural gas partial pipeline in existing technology
Gas is only used, natural gas in upstream and downstream valve, emptying construction pipeline is closed, then constructed；Use gas unit along so giving and
Very big influence is caused with the resident of gas；And existing method, operating efficiency is very low, and required time is also very
It is long, seriously add difficulty of construction.
The content of the invention
The purpose of the present invention is in view of the deficienciess of the prior art, providing the online hatch method of natural gas line.
Technical scheme：It is of the present invention to solve the problems, such as that used technical scheme is：A kind of online hatch method of natural gas line,
Comprise the following steps：
(1) at the air-leak section for determining natural gas line and the replacing for determining the natural gas line to be changed, and determine to be somebody's turn to do
The pipeline internal transmission pressure of natural gas line, determines transmission route and the upstream and downstream user of pipeline, determines natural needed for user
Tolerance, the minimum time of amount of natural gas needed for selection, the short online opening for carrying out natural gas line was changed；
(2) determine natural gas line opening and replacing at after, first upstream end at opening installs end plugging device, seals
The pipeline pressure of blocked pipeline upstream；Lower end plugging device is installed by the closure in the downstream of pipeline at the downstream after closure at by opening
Pressure is blocked；
(3) after the plugging device of upstream and downstream is installed, before operation is carried out need that balanced valve is installed near plugging device, lead to
The instrument of overbalance valve shows the pressure inside pressure pipeline, according to the pipeline pressure of upstream and downstream, is slowly blocked, and pass through
Observation distance piece pipeline pressure ensures just carry out next step operation after blocking successfully；
(4) after accurately confirming distance piece pressure thoroughly after closure, the pipeline of the discarded section of emptying and carry out cutting displacement or
Dismounting joint is changed, after replacing after the head operation of the company of progress, new and old piping foundation, and nitrogen is full of in the pipeline newly changed.
(5) after nitrogen charging is carried out, cold put 30 minutes carries out releasing closure, and downstream plugging device is first released when releasing closure, every
Upstream plugging device is dismantled after 10 minutes, by-pass line is removed afterwards, recovers existing equipment, pipeline and carries out pumped (conveying) medium.
Preferably, being cut in the step (4) using cutting tool of not getting angry, and entered using new company's head instrument
Row even head operation.
Preferably, the plugging device in the step (2) is using isolated plugging device is inflated, using automatic deblocking during deblocking
Mode unseal internal pressure.
Beneficial effect：The present invention compared with prior art, with advantages below：The construction method of the present invention is not influence
Under the permission highest closure pressure of downstream line user's request, press and open holes install plugging device after perforate, start to block operation,
First closure carries out chimneying direction upstream, and downstream is blocked afterwards, balances plugging device both sides air pressure with balanced valve, is slowly sealed
It is stifled；Confirmed by observing distance piece pipeline pressure after blocking successfully, the discarded segment pipe of emptying is simultaneously replaced, using cutting work of not getting angry
Tool is cut, and the head operation of the company of progress；Nitrogen displacement is carried out after the completion of new old pipeline connection, closure is released, successively unload,
Downstream plugging device, removes bypass pipe, then recovers original equipment, pipeline medium, to prevent the leakage of pumped (conveying) medium and
The interruption of pipeline transportation；Whole process easy construction, difficulty of construction is relatively low, and does not influence the use of user along pipeline, non-
Normal convenience.
Embodiment
With reference to specific embodiment, the present invention is furture elucidated, and the present embodiment is premised on technical solution of the present invention
It is lower to be implemented, it should be understood that these embodiments are only illustrative of the invention and is not intended to limit the scope of the invention.
A kind of online hatch method of natural gas line, comprises the following steps：
(1) at the air-leak section for determining natural gas line and the replacing for determining the natural gas line to be changed, and determine to be somebody's turn to do
The pipeline internal transmission pressure of natural gas line, determines transmission route and the upstream and downstream user of pipeline, determines natural needed for user
Tolerance, the minimum time of amount of natural gas needed for selection, the short online opening for carrying out natural gas line was changed；
(2) determine natural gas line opening and replacing at after, first upstream end at opening installs end plugging device, seals
The pipeline pressure of blocked pipeline upstream；Lower end plugging device is installed by the closure in the downstream of pipeline at the downstream after closure at by opening
Pressure is blocked；
(3) after the plugging device of upstream and downstream is installed, before operation is carried out need that balanced valve is installed near plugging device, lead to
The instrument of overbalance valve shows the pressure inside pressure pipeline, according to the pipeline pressure of upstream and downstream, is slowly blocked, and pass through
Observation distance piece pipeline pressure ensures just carry out next step operation after blocking successfully；
(4) after accurately confirming distance piece pressure thoroughly after closure, the pipeline of the discarded section of emptying and carry out cutting displacement or
Dismounting joint is changed, after replacing after the head operation of the company of progress, new and old piping foundation, and nitrogen is full of in the pipeline newly changed.
(5) after nitrogen charging is carried out, cold put 30 minutes carries out releasing closure, and downstream plugging device is first released when releasing closure, every
Upstream plugging device is dismantled after 10 minutes, by-pass line is removed afterwards, recovers existing equipment, pipeline and carries out pumped (conveying) medium.
Cut in the step (4) using cutting tool of not getting angry, and even head is carried out using new company's head instrument and made
Industry；Plugging device in the step (2) unseals inside using isolated plugging device is inflated by the way of unsealing automatically during deblocking
Pressure.
The construction method of the present invention is not influence the permission highest of downstream line user's request to block under pressure, and band is pressed off
Plugging device is installed after hole, perforate, starts to block operation, first closure carries out chimneying direction upstream, downstream is blocked afterwards, with balance
Valve balance plugging device both sides air pressure, is slowly blocked；Confirm after blocking successfully that emptying is useless by observing distance piece pipeline pressure
Abandon segment pipe and replace, cut using cutting tool of not getting angry, and the head operation of the company of progress；New old pipeline connection completes laggard
Row nitrogen displacement, releases closure, successively unloads upstream and downstream plugging device, removes bypass pipe, then to recover original equipment, pipeline defeated
Medium is sent, the leakage of pumped (conveying) medium and the interruption of pipeline transportation to prevent；Whole process easy construction, difficulty of construction is relatively low,
And the use of user along pipeline is not influenceed, it is very convenient.
Above-mentioned embodiment is a preferred embodiment of the present invention, is not the implementation for limiting the present invention
The equivalence changes made with right, all contents according to described in the present patent application scope of patent protection and modification,
It all should be included in the range of present patent application.
Claims (3)
1. the online hatch method of natural gas line, it is characterised in that：Comprise the following steps：
(1) at the air-leak section for determining natural gas line and the replacing for determining the natural gas line to be changed, and determine that this is natural
The pipeline internal transmission pressure of feed channel, determines transmission route and the upstream and downstream user of pipeline, determines amount of natural gas needed for user,
The minimum time of amount of natural gas needed for selection, the short online opening for carrying out natural gas line was changed；
(2) determine natural gas line opening and replacing at after, first upstream end at opening installs end plugging device, closure pipe
The pipeline pressure of road upstream；Lower end plugging device is installed by the closure pressure in the downstream of pipeline at the downstream after closure at by opening
Block；
(3) after the plugging device of upstream and downstream is installed, before operation is carried out need that balanced valve is installed near plugging device, by flat
The instrument of weighing apparatus valve shows the pressure inside pressure pipeline, according to the pipeline pressure of upstream and downstream, is slowly blocked, and passes through observation
Distance piece pipeline pressure ensures just carry out next step operation after blocking successfully；
(4) after accurately confirming that distance piece pressure is thoroughly blocked, the pipeline of the discarded section of emptying simultaneously carries out cutting displacement or dismounting
Joint is changed, after replacing after the head operation of the company of progress, new and old piping foundation, and nitrogen is full of in the pipeline newly changed.
(5) after nitrogen charging is carried out, cold put 30 minutes carries out releasing closure, downstream plugging device is first released when releasing closure, every 10 points
Upstream plugging device is dismantled after clock, by-pass line is removed afterwards, recovers existing equipment, pipeline and carries out pumped (conveying) medium.
2. the online hatch method of natural gas line according to claim 1, it is characterised in that：Used in the step (4)
Cutting tool of not getting angry is cut, and carries out even head operation using new company's head instrument.
3. the online hatch method of natural gas line according to claim 1, it is characterised in that：Envelope in the step (2)
Stifled device unseals internal pressure using isolated plugging device is inflated by the way of unsealing automatically during deblocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710509036.6A CN107246529A (en) | 2017-06-28 | 2017-06-28 | The online hatch method of natural gas line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710509036.6A CN107246529A (en) | 2017-06-28 | 2017-06-28 | The online hatch method of natural gas line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107246529A true CN107246529A (en) | 2017-10-13 |
Family
ID=60013665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710509036.6A Pending CN107246529A (en) | 2017-06-28 | 2017-06-28 | The online hatch method of natural gas line |
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| Country | Link |
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| CN (1) | CN107246529A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506071A (en) * | 2019-01-11 | 2019-03-22 | 东莞新奥燃气有限公司 | A kind of online plugging method of fuel gas transportation pipeline |
| CN112628509A (en) * | 2020-12-16 | 2021-04-09 | 上海能源建设集团有限公司 | Method for preventing iron filings from backflushing in process of drilling and connecting new pipe with pressure in gas high-pressure pipeline |
-
2017
- 2017-06-28 CN CN201710509036.6A patent/CN107246529A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506071A (en) * | 2019-01-11 | 2019-03-22 | 东莞新奥燃气有限公司 | A kind of online plugging method of fuel gas transportation pipeline |
| CN112628509A (en) * | 2020-12-16 | 2021-04-09 | 上海能源建设集团有限公司 | Method for preventing iron filings from backflushing in process of drilling and connecting new pipe with pressure in gas high-pressure pipeline |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171013 |