CN101514776B - Method for permanent pressure leak stopping - Google Patents
Method for permanent pressure leak stopping Download PDFInfo
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- CN101514776B CN101514776B CN 200810007258 CN200810007258A CN101514776B CN 101514776 B CN101514776 B CN 101514776B CN 200810007258 CN200810007258 CN 200810007258 CN 200810007258 A CN200810007258 A CN 200810007258A CN 101514776 B CN101514776 B CN 101514776B
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Abstract
The invention relates to a novel method for performing permanent pressure leak stopping on a pipeline by a clamping device or a steel strip and a fiber reinforcement composite material. The method comprises the following steps to finish the reinforcement of the permanent pressure leak stopping: performing temporary leak stopping treatment on the pipeline by the clamping device or the steel strip; performing filling and leveling transition on irregularly regions on the clamping device or the steel strip and a steel strip clip by a filling and leveling material; and enwinding the regions containing the clamping device or the steel strip by a continuous fibrous composite material. The method for leak stopping has the advantages of no need of fire permit, simplicity, convenience, fastness, easy mastery, and the like, and not only is applicable to straight pipe sections, but also is applicable to parts of weld junctions, tee joints, elbows, reducing joints, valve joints, flanges, flange roots and the like to ensure the normal operation of the pipeline and play a role in permanent leak stopping reinforcement.
Description
Technical field
The invention belongs to the maintenance and repair field of chemical industry equipment, specifically, the present invention relates to a kind of method of permanent pressure leak stopping.
Background technique
Pipeline and container during because of reasons such as material and welding quality, artificial destruction, inside and outside corrosion regular meeting perforation occurs and leak.Leak and constantly threatening oil and gas pipes normally to move." run, drip, leak " are recurrent problem in factory and the engineering of each industrial department, and are particularly outstanding in oil refining, chemical industry and petrochemical plant and gas pipeline especially.
Traditional emergency repair method of pipe leakage except that replace tubes general also have below several kinds: repair welding method, steel band method, gluing connection, anchor clamps injecting glue method.Wherein repair welding method is to utilize welding heat energy to make molten metal that the crackle on the pipeline is linked to be the integral solder joint or on the leakage defect of metal, add to weld a closure plate, makes it to reach a kind of special technique means (claiming crator method or patch installing again) of reusing.The shortcoming of this method is that inflammable and explosive medium delivering pipe welding is had great danger; Construction is complicated, needs step-down, stops the supple of gas or steam, issues the notice of stopping the supple of gas or steam in advance, handles " examination and approval procedures of getting angry ".
The steel band method is to use external force to be wrapped in leak position on the pipeline to steel band, utilizes the rubber pad between steel band and the leakage point to carry out leak stopping.This method is applicable to the interim leak stopping of mesolow pipe leakage.This method simple and fast, but can only handle as a kind of interim leak stopping.The rubber sheet gasket easy ageing, steel band is subject to factor affecting such as outer force-disturbance, the probability that leak stopping was lost efficacy is bigger, from rather than one well leak solution.
Mull technique relies on external force that adhesive is directly clogged the equipment leakage position, stops the blocking method of leakage by force.This method leak stopping success rate is not high, can't directly handle for high-pressure leakage.
Anchor clamps injecting glue method is utilized the appearance of leakage position and the sealed cavity that anchor clamps constitute, and injects and be full of sealed cavity, stops leaking of medium, thereby stops a leak.It has need not to get angry, advantage such as high temperature resistant, high pressure.But anchor clamps are special devices, and general requirement body is customized, and process time is longer, is difficult to deal with sudden operation.In addition, if leak stopping pump injecting glue overpressure, the pipeline that possibly rupture causes more serious leakage accident.
Summary of the invention
Therefore, the inventor is intended to through the present invention deficiency of the prior art improved.
One aspect of the present invention provides a kind of method of permanent pressure leak stopping, and this method may further comprise the steps:
(1) leakage point is carried out interim leak stopping;
(2) this leak source being carried out permanent leak stopping strengthens.
This method can be carried out leak stopping under the situation that pipeline does not stop to fail, need not get angry, simple and efficient, easy master.It is needed ageing, simple and efficient that method of the present invention not only can satisfy pressure sealing, and strengthened the leak stopping sealing effect, strengthened Pipeline Leakage Point intensity on every side, guaranteed the permanence of leak stopping effect.
The present invention also comprises technology and method for using and the application that anchor clamps leak stopping of the present invention or steel band leak stopping combine with composite material reinforcement reinforcing phase on the other hand.
Description of drawings
Fig. 1 is the interim leak stopping side view of straight tube in the embodiment of the invention 1.
Fig. 2 is the interim leak stopping schematic representation of straight tube in the embodiment of the invention 1.
Fig. 3 is the schematic representation after the permanent leak stopping of straight tube strengthens in the embodiment of the invention 1.
Fig. 4 is the interim leak stopping schematic representation of elbow in the embodiment of the invention 2.
Fig. 5 fills and leads up the schematic representation after resin is filled and led up transition for elbow leak stopping in the embodiment of the invention 2.
Fig. 6 is the schematic representation after the permanent leak stopping of elbow strengthens in the embodiment of the invention 2.
Fig. 7 is the interim leak stopping side view of straight tube in the embodiment of the invention 3.
Fig. 8 is the interim leak stopping schematic representation of straight tube in the embodiment of the invention 3.
Fig. 9 is the schematic representation after the permanent leak stopping of straight tube strengthens in the embodiment of the invention 3.
Figure 10 is the interim leak stopping schematic representation of elbow in the embodiment of the invention 4.
Figure 11 fills and leads up the schematic representation after resin is filled and led up transition for elbow leak stopping in the embodiment of the invention 4.
Figure 12 is the schematic representation after the permanent leak stopping of elbow strengthens in the embodiment of the invention 4.
Embodiment
On the one hand, the invention provides a kind of method of permanent pressure leak stopping, this method may further comprise the steps:
(1) leakage point is carried out interim leak stopping;
(2) this leak source being carried out permanent leak stopping strengthens.
In one embodiment, use the leak stopping anchor clamps to carry out interim leak stopping.
In one embodiment, use steel band to carry out interim leak stopping.
In one embodiment, utilize steel band tensioning tool tension steel band, kill gasket seal on equipment or the pipe leakage point or sealer, stop leakage temporarily.
Particularly, when leaking appears in equipment, the steel band of choosing is wrapped on pipeline or the equipment, use and tighten handle tension steel band.When steel band is tightened to a certain degree, be placed on the steel band inboard to preprepared pad or sealer, over against leak, rotation is tightened handle and is blocked leak rapidly then.After treating that leakage stops, the fastening steel band that is wrapped on the pipeline excises unnecessary steel band then, and from fastening bending, interim leak stopping finishes otch one end (i.e. outside one end).
In another embodiment, use is filled and led up material and is filled and led up transition, twines then, strengthens thereby accomplish leak stopping.Particularly, at first near the metallic conduit leak is carried out removing surface; Irregular areas such as anchor clamps are carried out transition and fill and lead up with filling and leading up material, fill and lead up to surfacing.
In yet another embodiment, said leak stopping anchor clamps can be the injecting glue seal clamps, also can be the gasket seal anchor clamps.Described anchor clamps material is carbon steel or stainless steel, and its width and thickness can take the circumstances into consideration to select according to leaking concrete condition.
Injecting glue sealed type anchor clamps of the present invention or gasket seal type anchor clamps are instruments of pressure sealing when being used for various pipes pipe network perforation leakage, and this instrument market is on sale.
In one embodiment, use continuous fiber reinforced composite materials to twine, permanent enhancing, leak stopping are carried out in leak stopping.
In one embodiment, the described material of filling and leading up can be epoxy resin, phenolic resin, polyurethane resin, polyether resin, polyimide resin, amino resin or unsaturated polyester resin or itself and certain mechanics enhanced granule mixtures of material; Preferred epoxy or itself and mechanics enhanced granule mixtures of material.
In one embodiment, described fibre reinforced composites are made up of adhesive and lamination coating.
Composite material is defined as described in this paper: with through two or more component (or claiming constituent element) that select, that contain some ratios; Through artificial compound, form heterogeneous, three-dimensional combine and each has sharp interface, the material with property between mutually.Composite material is made up of with matrix reinforcing phase mutually.Wherein reinforcing phase is the fibre reinforced composites that are called of fiber.
In one embodiment, said adhesive is the matrix phase, uses conventional thermosetting resin and thermoplastic resin usually, like epoxy resin.
In one embodiment, said fibre reinforced composites comprise continuous fiber reinforced composite materials and discontinuous fiber (for example whisker and chopped strand) reinforced composite, preferred continuous fiber reinforced composite materials.
In one embodiment, the lamination coating that constitutes said continuous fiber reinforced composite materials comprises unidirectional fibre, and no latitude cloth lamination (quadrature, oblique), two-dimensional fabric layer close, multidirectional woven composite and fiber hybrid composite.
In one embodiment, said fiber comprises organic fiber (like aramid fibre, polyvinyl fiber), graphite fiber, basalt fibre, glass fibre, boron fiber, preferred graphite fiber, glass fibre, silicon carbide fiber, more preferably graphite fiber.
In one embodiment, winding step comprises in the inventive method:
(1) brushing adhesive stick;
(2) lay fiber;
(3) randomly repeat (1) and (2) repeatedly, be cured then, wherein the fiber of every layer of use can be identical or different.
In one embodiment, the step of laying fibre reinforced composites comprises:
(1) adhesive is brushed on the fiber;
(2) lay the fiber of having brushed the preimpregnation adhesive;
(3) randomly repeat (1) and (2) repeatedly, be cured then, wherein the fiber of every layer of use can be identical or different.
In one embodiment; The said fiber of having brushed the preimpregnation adhesive comprises has brushed the fiber that adhesive and completion of cure have formed fibrous composite; And brushed adhesive, need in practical operation, be heating and curing to form the fiber of fibrous composite.
In one embodiment; When laying the reinforcing fiber of said composite material; Can lay along pipeline axial, hoop is laid or lay with certain angle of inclination, also can be the combination in any of several kinds of paving modes, the for example wherein combination of two kinds or three kinds paving modes.
Specifically; The method of said laying fibre reinforced composites is methods that wet method is pasted fibre reinforced composites, promptly pastes said fibre reinforced composites by the certain size and the number of plies, said fibre reinforced composites brushing described sticking impregnation; Or with described sticking impregnation dipping; And make as required layers of material along pipeline radially or hoop place, can be parallel, vertical or staggered at a certain angle the laying between the adjacent materials at two layers, or crisscross.
Pipeline through after the fibrous composite reparation has reached mechanical strength, has accomplished permanent leak stopping.
Used adhesive can be any resin that can buy on the market in the method for the invention, the preferred employed resin that can satisfy below table 1 performance index.
Table 1 adhesive mechanical property requirements scope
| Mechanical property | Scope | Preferably | More preferably |
| Compression strength | ＞10MPa | ＞20MPa | ＞50MPa |
| Interface shear strength | ＞2MPa | ＞4MPa | ＞12MPa |
| Interface tensile strength | ＞2MPa | ＞5MPa | ＞10MPa |
| Young's modulus | ＞0.1GPa | ＞0.5GPa | ＞1.5GPa |
On the other hand, the present invention also comprises technology and method for using and the application that anchor clamps leak stopping of the present invention or steel band leak stopping combine with composite material reinforcement reinforcing phase.
Method leak stopping of the present invention; Simple and efficient; Easy master is not only applicable to straight pipeline, and is applicable to positions such as weld bond, threeway, elbow, reducing, valve interface, flange plate, flange plate root, container tank connecting tube root; Guarantee the normal operation of pipeline, and the effect that can play permanent leak stopping and strengthen.
In order further to set forth related material of present technique and construction process, provided following embodiment.But, the scope that these embodiments do not limit the present invention in any way.
Embodiment's 1 pipeline mechanical deterioration leak stopping (anchor clamps method)
Subsidiary factory of our company feed channel, interior pressure are 0.4MPa, pipeline straight tube top, and mechanical deterioration causes leaking.We utilize the interim leak stopping of anchor clamps (accompanying drawing 1), utilize leak stopping to fill and lead up the resin transition, (accompanying drawing 2).Utilize carbon fiber composite to twine, accomplish leak stopping and strengthen (accompanying drawing 3).
Concrete, the fibrous composite winding operation carries out as follows:
At first metallic conduit is carried out removing surface; Use the sandblast machine or manually electric angle grinder the pipe surface rust cleaning of polishing is reached " preceding steel surface rusting grade of application and derusting grade " (GB8923-88) desired Sa2.5 or St3 rank.
Utilize leak stopping to fill and lead up resin and fill and lead up transition, repair to chucking surface and anchor clamps and the surfacing of pipeline calmodulin binding domain CaM smooth applying the anchor clamps zone.
The wet method affixing carbon fabric: in the long interval of 300mm, paste 1 layer on graphite fiber along pipeline axial, hoop twines 3 layers.Wherein said carbon fibre cloth brushing or flooded sticking impregnation of the present invention.
After 24 hours, carbon fiber composite curing reaches intensity, has accomplished permanent leak stopping and has strengthened.
Do bursting test according to SY-T5992-94 " conveying steel pipe hydrostatic pressing bursting test method ", do not have the leak explosion at pipeline after reaching 15MPa, and leak stopping enhancing place is excellent.Show the enforcement of this leak stopping enhancement technique, reached desirable effect.
Embodiment's 2 bend pipe leak stopping (anchor clamps method)
Subsidiary factory of our company feed channel, interior pressure are 1.0MPa, and leak at elbow evagination position.We utilize the interim leak stopping of anchor clamps (accompanying drawing 4), utilize leak stopping to fill and lead up resin transition (accompanying drawing 5).Utilize glass fiber compound material to twine 4 layers of hoops, accomplish leak stopping and strengthen (accompanying drawing 6).
Concrete step is seen embodiment 1.
Embodiment's 3 pipeline mechanical deterioration leak stopping (steel band method)
Subsidiary factory of our company feed channel, interior pressure are 0.4MPa, pipeline straight tube top, and mechanical deterioration causes leaking.We utilize the interim leak stopping of steel band (accompanying drawing 7), utilize leak stopping to fill and lead up the resin transition, (accompanying drawing 8).Utilize carbon fiber composite to twine, accomplish leak stopping and strengthen (accompanying drawing 9).
Concrete, the fibrous composite winding operation carries out as follows:
At first metallic conduit is carried out removing surface; Use the sandblast machine or manually electric angle grinder the pipe surface rust cleaning of polishing is reached " preceding steel surface rusting grade of application and derusting grade " (GB8923-88) desired Sa2.5 or St3 rank.
Utilize leak stopping to fill and lead up resin and fill and lead up transition, repair to steel strip surface and steel band and the surfacing of pipeline calmodulin binding domain CaM smooth applying the steel band zone.
The wet method affixing carbon fabric: in the long interval of 300mm, paste 1 layer on graphite fiber along pipeline axial, hoop twines 3 layers.Wherein said carbon fibre cloth brushing or flooded sticking impregnation of the present invention.
After 24 hours, carbon fiber composite curing reaches intensity, has accomplished permanent leak stopping and has strengthened.
Do bursting test according to SY-T5992-94 " conveying steel pipe hydrostatic pressing bursting test method ", do not have the leak explosion at pipeline after reaching 15MPa, and leak stopping enhancing place is excellent.Show the enforcement of this leak stopping enhancement technique, reached desirable effect.
Embodiment's 4 bend pipe leak stopping (steel band method)
Subsidiary factory of our company feed channel, interior pressure are 1.0MPa, and leak at elbow evagination position.We utilize the interim leak stopping of steel band (accompanying drawing 10), utilize leak stopping to fill and lead up resin transition (accompanying drawing 11).Utilize glass fiber compound material to twine 4 layers of hoops, accomplish leak stopping and strengthen (accompanying drawing 12).
Concrete step is seen embodiment 3.
Permanent pressure leak stopping new method and the application thereof that utilizes fibrous composite to carry out pipeline provided by the invention is the damage repair technology of a practicality, can be used for various pipelines, gas transmission transport pipe for example, be large-scale pipeline renovation reinforced in indispensable practical technique.
Method of the present invention is the pressure sealing method, is not only applicable to straight pipeline, and is applicable to positions such as weld bond, threeway, elbow, reducer fitting, valve interface, flange plate, flange plate root, container tank connecting tube root.This blocking anti-corrosion not only need not got angry, and is simple and efficient, and easy master, and belong to pressure sealing guarantees the normal operation of pipeline, and along with the solidifying of fibrous composite, strengthened the leak stopping sealing effect.In addition, fibre reinforced composites have the reinforcement effect to pipeline, have increased the local strength in Pipeline Leakage Point zone.
Below described embodiment of the present invention in detail, can do a lot of improvement and variation obviously for a person skilled in the art and can not deviate from essence spirit of the present invention.All these variations and improvement are all within protection scope of the present invention.
Claims (9)
1. the method for the permanent pressure leak stopping that need not get angry, this method may further comprise the steps:
(1) steel band that uses the gasket seal anchor clamps or be provided with pad carries out interim leak stopping to leakage point;
(2) this leak source being carried out permanent leak stopping strengthens; Wherein said anchor clamps or steel band irregular area are used and fill and lead up material and fill and lead up transition, twine then, strengthen thereby accomplish leak stopping.
2. according to the described method of claim 1, the said material of filling and leading up is selected from epoxy resin, phenolic resin, polyurethane resin, polyether resin, polyimide resin, amino resin, unsaturated polyester resin or above-mentioned resin material and mechanics enhanced granule mixtures of material; Twining employed material is continuous fiber reinforced composite materials.
3. according to the described method of claim 1, wherein said gasket seal anchor clamps utilize the pad between anchor clamps and the pipeline to realize interim leak stopping, and said pad adopts rubber to process.
4. according to the described method of claim 3, wherein said rubber is selected from one or more in natural rubber, general synthetic cement, nitrile butadiene rubber, neoprene, ethylene propylene diene rubber, SBR, fluorine rubber, the silicone rubber.
5. according to the described method of claim 1, wherein the said steel band that is provided with pad is twined around pipeline and tie up, utilize the pad between steel band and the leak source to accomplish said interim leak stopping.
6. according to the described method of claim 5, wherein said pad adopts rubber to process.
7. according to the described method of claim 6, wherein said rubber is selected from one or more in natural rubber, general synthetic cement, nitrile butadiene rubber, neoprene, ethylene propylene diene rubber, SBR, fluorine rubber, the silicone rubber.
8. according to the described method of claim 2; Wherein use continuous fiber reinforced composite materials to carry out said winding, and no latitude cloth lamination, two-dimensional fabric layer that said continuous fiber reinforced composite materials is selected from unidirectional fibre, quadrature or oblique close, multidirectional woven composite and fiber hybrid composite.
9. according to the described method of claim 2, wherein said winding step comprises:
(1) brushing adhesive stick;
(2) lay fiber;
(3) randomly repeat (1) and (2) repeatedly, be cured then, wherein the fiber of every layer of use is identical or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200810007258 CN101514776B (en) | 2008-02-19 | 2008-02-19 | Method for permanent pressure leak stopping |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810007258 CN101514776B (en) | 2008-02-19 | 2008-02-19 | Method for permanent pressure leak stopping |
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| CN101514776A CN101514776A (en) | 2009-08-26 |
| CN101514776B true CN101514776B (en) | 2012-12-12 |
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| CN 200810007258 Expired - Fee Related CN101514776B (en) | 2008-02-19 | 2008-02-19 | Method for permanent pressure leak stopping |
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| CN102296647B (en) * | 2011-06-13 | 2013-08-14 | 深圳市百安百科技有限公司 | Method for permanently repairing leaked sinking caisson of offshore oil platform |
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| CN107939062A (en) * | 2017-11-06 | 2018-04-20 | 华南理工大学 | The method that thin fiber board reinforces maintenance shell class steel construction online |
| CN110185878B (en) * | 2019-05-05 | 2021-07-20 | 泉州市燃气有限公司 | Plugging device for rush repair of natural gas pipeline |
| CN114636048B (en) * | 2022-05-23 | 2022-08-09 | 山东维点技术有限公司 | Oil transportation pressure pipeline plugging device |
| CN117264366A (en) * | 2023-08-31 | 2023-12-22 | 上海管康技术有限公司 | Local emergency repair material for binary pipeline and repair method thereof |
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Granted publication date: 20121212 Termination date: 20180219 |