CN104455908A - Method for stopping leakage under pressure - Google Patents
Method for stopping leakage under pressure Download PDFInfo
- Publication number
- CN104455908A CN104455908A CN201410573978.7A CN201410573978A CN104455908A CN 104455908 A CN104455908 A CN 104455908A CN 201410573978 A CN201410573978 A CN 201410573978A CN 104455908 A CN104455908 A CN 104455908A
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- welding
- slips
- leakage
- pipeline
- leakage point
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a method for stopping leakage under pressure. The method comprises the following steps of conducting initial detection, wherein leakage is detected with acetone solution, and specific leakage points of a pipeline are accurately found and marked; conducting primary leakage stopping; conducting cleaning, wherein anti-corrosion matter, rust and impurities located within 50 mm away from the leakage points are removed; conducting patching, wherein welding slips are pressed to the leakage points, the force acting on the welding slips is adjusted to enable soft mats on the inner sides of the welding slips to completely seal the leakage points, and the leakage points will not leak; conducting welding, wherein the welding slips are welded to the leakage points of the pipeline, the welded portions are beaten with a mallet 30 minutes after welding to release welding stress. According to the method for stopping leakage under pressure, operation is easy, the technological content is low, special training is not needed, an ordinary maintenance worker can conduct operation, the maintenance cost is low, expense is small, system halt is avoided, dynamic sealing operation is conducted, normal production is not influenced, and leakage is eliminated rapidly.
Description
Technical field
The present invention relates to Live leaking-stopping technology field, particularly a kind of method of permanent pressure leak stopping.
Background technique
In oil refinery, chemical plant, pipeline is numerous; because the medium of its conveying constantly flows; wash away at burn into, under the impact of the factor such as vibration, on straight tube conveying pipeline section, on reducing pipeline section, flowing medium change nyctitropic elbow and threeway place, pipeline weld seam on often there will be leakage.And if leakage can not get effective control, environmental pollution will be caused, affects Business Economic Benefit and even security incident occurs.Therefore the major issue that leakage has just become modern oil refining, chemical enterprise research how fast and effeciently, is stopped when not reducing pressure medium and temperature in pipe.
In the ordinary course of things, pipeline is once leak, and be difficult to carry out repair welding in a dynamic state, reason has two: one, and the metal of melting is not before obtaining solidifying, and the medium that just may be ejected blows away; Its two, leaking medium itself likely threatens the personal safety of welding personnel, especially inflammable and explosive leaking medium, carries out repair welding with regard to being more difficult under dynamic situation.Therefore, in quite long period, seam leakage blinding technology with pressure is considered as forbidden zone by people always.
Traditional emergency repair method of pipe leakage generally also has following several except replace tubes: repair welding method, steel band method, gluing connection, fixture injecting glue method.Wherein, repair welding method utilizes welding heat energy to make molten metal the crackle on pipeline is linked to be integral solder joint or in the leakage defect of metal, be welded with a shut, makes it to reach a kind of special technique means (also known as crator method or patch installing) reused.The shortcoming of the method is, to inflammable and explosive medium delivering pipe welding with great danger; Construction is complicated, needs step-down, stops the supple of gas or steam, issues notice of stopping the supple of gas or steam in advance, handles " examination and approval procedures of getting angry ".
Steel band method uses external force steel strip winding leak position on pipeline, utilizes the rubber pad between steel band and leakage point to carry out leak stopping.The method is applicable to the interim leak stopping of mesolow pipe leakage.The method simple and fast, but can only as the interim leak stopping process of one.Rubber sheet gasket is easily aging, and steel band is subject to the impact of the factor such as outer force-disturbance, and the probability that leak stopping was lost efficacy is comparatively large, from instead of one well leak solution.
Such as application number is 200810007258.9, and denomination of invention is the patent of the method for permanent pressure leak stopping, relates to a kind of fixture or steel band and fibre reinforced composites of utilizing and carries out the method for permanent pressure leak stopping to pipeline.The method utilizes fixture or steel band to carry out interim leak stopping process to pipeline, then use and fill and lead up material, fixture or the irregular area such as steel band, steel band card are filled and led up transition, and recycling continuous fiber composite material is wound around the region comprising fixture or steel band, completes permanent leak stopping and strengthens.
Mull technique relies on external force that adhesive is directly clogged equipment leakage position, stops the blocking method of leakage by force.The method leak stopping success rate is not high, cannot directly process for high-pressure leakage.
The sealed cavity that fixture injecting glue method utilizes the appearance of leakage position and fixture to form, injects and is full of sealed cavity, stops leaking of medium, thus stops a leak.The advantages such as it has without the need to getting angry, high temperature resistant, high pressure, thus be widely used.This kind of blocking method, simple and efficient, easy grasp, be not only applicable to straight pipeline, and be applicable to the positions such as weld bond, threeway, elbow, reducing, valve interface, flange plate, flange plate root, container tank connecting tube root, ensure the normal operation of pipeline, and permanent leak stopping can be played and the effect strengthened.Pressure sealing sealing compound conventional at present mainly contains two kinds, and one is organic leakage blocking sealants, based on the macromolecular material such as synthetic rubber and synthetic resin, adds appropriate filler and auxiliary agent, becomes through mechanical mixing face.Though can be used for the blocking up under pressure of steam, water, wet goods medium, by the impact of macromolecular material Degradation Characteristics, its serviceability temperature is no more than 400 DEG C.Another kind is the ceramic adhesive after solidification, and they can resistance to more than 1200 DEG C high temperature, and be applicable to cermet material sealing, bonding, leak stopping, this ceramic adhesive needs now with the current, is not suitable for pressure sealing.
Such as application number is 201010181109.1, and denomination of invention is a kind of sealant for high temperature pressurized leakage stop-up, relates to a kind of sealant for high temperature pressurized leakage stop-up, belongs to macromolecule chemical industry technical field.It is characterized in that with nitrile butadiene rubber and LNBR for main body sizing material, add phenolic resin and be equipped with reinforcement, bulking agent, age resister, vulcanzing agent, promoter, tenderer and other additive, making after opening refining mixing can to the high temperature leakage blocking sealants implementing pressure sealing under the different medium states such as high-temperature steam, high temperature, hydrocarbon and vapor plume.Sealing agent Applicable media is extensive, ability erosion medium resistance, and keeps stable for a long time.Sealing agent has excellent oil resistance, heat resistance, the excellent adhesion of bin stability and polar material.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, and can heatproof, corrosion-resistant, the method for bearing pressure, permanent pressure leak stopping that bonding force is strong after providing a kind of simple to operate, leak stopping.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A method for pressure sealing, comprises the following steps:
The first step, initial survey: with acetone soln leak detection, accurately find out the concrete leakage point position of pipeline and mark;
Second step, just blocks up: carry out simple preliminary leak stopping process to the leakage point that the first step finds, alleviate leakiness;
3rd step, cleaning: to leakage point just stifled in second step, to remove around it preservative substance, iron rust and impurity within the scope of 50mm;
4th step, patch: be pressed in by welding slips on the leakage point after the 3rd step cleaning, the active force of corrective action on welding slips, makes the complete shutoff leakage point of the cushion inside welding slips, leakage point is no longer leaked;
5th step, welding: welding slips is welded on leakage point position on pipeline, and within 30 minutes, knock welding part release welding stress with mallet at postwelding.
In 5th step of the present invention, welding slips is corresponding with pipeline, and welding slips is arc plate, and welding slips outer side surface is fixedly connected with hook below.
In 5th step of the present invention, with weld slips symmetrical position place and weld auxiliary connection board, auxiliary connection board side connects tightening nut, tightening nut connects clamping bolt, auxiliary connection board has through hole, this through hole communicates with tightening nut, and upper being fixedly connected with below of auxiliary connection board is fastenedly connected chain, and the free end being fastenedly connected chain is corresponding with hook.
Method just stifled in second step of the present invention is with happy safe 242 sealer shutoff leakage points.
In 4th step of the present invention, the material of welding slips is identical with the material of pipeline or close.
In 4th step of the present invention, the cushion material inside welding slips is acrylate.
After the present invention adopts technique scheme, there is following technique effect:
Adopt the urgency of the method for the invention process operational outfit burst dielectric leakage; can with pressurely carry out; do not affecting under normal prerequisite of producing; shutoff, reparation are carried out to band temperature, leakage equipment with pressure; the problems such as the run, drip, leak of pipeline can be eliminated rapidly, avoid unit load down that conventional repair method may cause, shutdown and the tremendous economic loss that brings.
Compared with traditional leak stopping mode, the present invention is adopted to have the following advantages:
1, simple to operate, with low content of technology, do not need special training, ordi-nary maintenance workman can operate.
2, maintenance cost is low, expense is few, eliminates the time of system shutdown.
3, belong to dynamic seal (packing) operation, do not affect normal production, stop a leak rapidly.
4, do not need to be equipped with special instrument device, common welding machine can carry out operation.
5, after leak stopping can heatproof, corrosion-resistant, bear pressure, bonding force is strong.The safety permanent reinforcing and repairing solving the defective locations such as pipeline trachoma, crack, thoroughly can reach the object of permanent pipe-repairing.
Accompanying drawing explanation
For making object of the present invention and technological scheme clearly, below in conjunction with the embodiment of the present invention, technological scheme of the present invention is clearly and completely described.Obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on described embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under without the need to the prerequisite of creative work, belongs to the scope of protection of the invention.
Fig. 1 shows auxiliary connection board of the present invention, be fastenedly connected structural representation when chain uses;
Wherein have: 1, clamping bolt; 2, tightening nut; 3, auxiliary connection board; 4, chain is fastenedly connected; 5, slips is welded; 6, link up with.
Embodiment
For making object of the present invention and technological scheme clearly, below in conjunction with the embodiment of the present invention, technological scheme of the present invention is clearly and completely described.Obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on described embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under without the need to the prerequisite of creative work, belongs to the scope of protection of the invention.
In the present invention, welding slips 5 is the arc tile fragment with certain radian processed according to the pipe diameter size of leakage pipe, and two edges up and down of welding slips 5 are welded with hook 6, and the free end being fastenedly connected chain 4 is connected with hook 6.Carry out tensioning by rotational fastener bolt 1 and be fastenedly connected chain 4 and welding slips 5, realize the sealing of welding slips 5 and leakage point.
The method of the invention is preferably carried out with following steps:
The first step, initial survey.Before welding craft leakage mending method and technique are proved, find out that the reason of pipe leakage is very important, also will carry out conscientiously carefully checking to leak part, to determine that whether mending-leakage work is safe and feasible.With acetone soln leak detection, accurately find out the concrete leak position of pipeline and mark, to carry out subsequent treatment.
Second step, just blocks up.Simple preliminary leak stopping process is carried out to pipe leakage point, with happy safe 242 sealer shutoff leakage points, leakiness is alleviated to some extent.
3rd step, cleaning.To dispose around Pipeline Leakage Point preservative substance, iron rust and impurity within the scope of 50mm.
4th step, patch.Carry out strength accounting with the operating temperature of leak part and working pressure, calculate the intensity of welding slips 5 wlding, make the material of welding slips 5 identical with the material of pipeline or close, to ensure its service behaviour.Be pressed on leak position by welding slips 5, the active force of corrective action on welding slips 5, makes the complete shutoff leakage point of the cushion acrylate inside welding slips 5, leakage point is no longer leaked.
5th step, welding.Welding slips 5 is welded on pipeline, and within 30 minutes, knocks welding part release welding stress with mallet at postwelding.
Preferably, carry out twice welding respectively when welding slips 5, welding slips 5 is reinforced.First time is tack welding, and welding slips 5 seals and is firmly welded on pipeline by second time.Because welding slips 5 can because the larger distortion of overheated generation when welding, so will the seam of welding slips 5 and gap be reserved in advance before formal welding welding slips 5.
In the present invention, preferred weld method is manual electric arc welding, because require flexible and convenient operation herein, and can carry out all-position welding, and is suitable for welding multiple material.Preferred weld current range is 70A-120A, has welded rear butt welded seam and has carried out knocking release welding stress, with crack resistence.
Preferably, carry out the 6th step after welding, leak detection: it is being hunted leak and the preservative treatment of necessity.
As shown in Figure 1, before welding slips 5 is welded in pipe leakage point, be fixedly connected with hook 6 below on its outer lateral surface,
The opposite side of pipeline with weld slips 5 symmetrical position place and weld auxiliary connection board 3, auxiliary connection board 3 side connects tightening nut 2, tightening nut 2 connects clamping bolt 1, auxiliary connection board 3 has through hole, this through hole communicates with tightening nut 2, upper being fixedly connected with below of auxiliary connection board 3 is fastenedly connected chain 4, and the free end being fastenedly connected chain 4 is corresponding with hook 6.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
The implication of the "and/or" described in the present invention refers to respective individualism or both simultaneous situations include interior.
The implication of " inside and outside " described in the present invention refers to relative to equipment itself, in the direction of sensing equipment inside is, otherwise is outward.
When the implication of " left and right " described in the present invention refers to reader just to accompanying drawing, the left side of reader is a left side, and the right of reader is the right side.
The indirect connection that can be the direct connection between parts also can be by other parts between parts of the implication of " connection " described in the present invention.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to right.
Claims (6)
1. a method for pressure sealing, is characterized in that, comprises the following steps:
The first step, initial survey: with acetone soln leak detection, accurately find out the concrete leakage point position of pipeline and mark;
Second step, just blocks up: carry out simple preliminary leak stopping process to the leakage point that the first step finds, alleviate leakiness;
3rd step, cleaning: to leakage point just stifled in second step, to remove around it preservative substance, iron rust and impurity within the scope of 50mm;
4th step, patch: will weld slips (5) be pressed in the 3rd step cleaning after leakage point on, the active force of corrective action in welding slips (5), makes the complete shutoff leakage point of cushion of welding slips (5) inner side, leakage point is no longer leaked;
5th step, welding: slips (5) will be welded and be welded on leakage point position on pipeline, and within 30 minutes, knock welding part release welding stress with mallet at postwelding.
2. the method for a kind of pressure sealing according to claim 1, is characterized in that: in described 5th step, and welding slips (5) is corresponding with pipeline, and welding slips (5) is arc plate, and welding slips (5) outer side surface is fixedly connected with hook (6) below.
3. the method for a kind of pressure sealing according to claim 2, it is characterized in that: in described 5th step, with weld slips (5) symmetrical position place and weld auxiliary connection board (3), auxiliary connection board (3) side connects tightening nut (2), tightening nut (2) connects clamping bolt (1), (3) have through hole to auxiliary connection board, this through hole communicates with tightening nut (2), upper being fixedly connected with below of auxiliary connection board (3) is fastenedly connected chain (4), and the free end being fastenedly connected chain (4) is corresponding with hook (6).
4. the method for a kind of pressure sealing according to claim 1, is characterized in that: method just stifled in described second step, is with happy safe 242 sealer shutoff leakage points.
5. the method for a kind of pressure sealing according to claim 1, is characterized in that: in described 4th step, and the material of welding slips (5) is identical with the material of pipeline or close.
6. the method for a kind of pressure sealing according to claim 1, is characterized in that: in described 4th step, and the cushion material of welding slips (5) inner side is acrylate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573978.7A CN104455908A (en) | 2014-10-24 | 2014-10-24 | Method for stopping leakage under pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573978.7A CN104455908A (en) | 2014-10-24 | 2014-10-24 | Method for stopping leakage under pressure |
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| CN104455908A true CN104455908A (en) | 2015-03-25 |
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| CN201410573978.7A Pending CN104455908A (en) | 2014-10-24 | 2014-10-24 | Method for stopping leakage under pressure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104828404A (en) * | 2015-05-06 | 2015-08-12 | 浙江中控太阳能技术有限公司 | Online emergency maintenance method and online emergency maintenance system of molten salt storage tank |
| CN107140336A (en) * | 2017-05-05 | 2017-09-08 | 天津安固密封技术有限公司 | A kind of tank body intersection plugging device and its method for blocking |
| CN112984271A (en) * | 2019-12-13 | 2021-06-18 | 湘潭宏远电子科技有限公司 | Method for probing and cleaning foreign matters in pipe |
| CN113994132A (en) * | 2018-09-24 | 2022-01-28 | 巴西终端设备材料有限公司 | Apparatus for pipeline maintenance and method of fastening in pipeline maintenance operations |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104828404A (en) * | 2015-05-06 | 2015-08-12 | 浙江中控太阳能技术有限公司 | Online emergency maintenance method and online emergency maintenance system of molten salt storage tank |
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| CN113994132A (en) * | 2018-09-24 | 2022-01-28 | 巴西终端设备材料有限公司 | Apparatus for pipeline maintenance and method of fastening in pipeline maintenance operations |
| CN112984271A (en) * | 2019-12-13 | 2021-06-18 | 湘潭宏远电子科技有限公司 | Method for probing and cleaning foreign matters in pipe |
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Application publication date: 20150325 |