CN110315668A - A kind of steel epoxy sleeve method for renovation - Google Patents
A kind of steel epoxy sleeve method for renovation Download PDFInfo
- Publication number
- CN110315668A CN110315668A CN201910477579.3A CN201910477579A CN110315668A CN 110315668 A CN110315668 A CN 110315668A CN 201910477579 A CN201910477579 A CN 201910477579A CN 110315668 A CN110315668 A CN 110315668A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- epoxy
- epoxy resin
- tube body
- steel
- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
Landscapes
- Pipe Accessories (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The invention discloses a kind of steel epoxy sleeve method for renovation, epoxy resin is first filled into formation epoxy grain pipe in thin-wall steel tube by it, epoxy grain pipe is mounted in sleeve of the both ends with chamfering according to most solid matter cloth again, sleeve is placed on bumper later epoxy resin is shatter, finally controlling the temperature around tube body makes sleeve and tube body form interference fit, so that sleeve is fixed on tube body.The invention has the beneficial effects that: (1) epoxy resin sleeve in the form of granules exist, and it is loaded in thin-wall steel tube one by one, epoxy resin no longer exists with big plate-like structure, so brittle cracking will not occur, a possibility that being destroyed so as to avoid steel epoxy sleeve because of epoxy resin brittle cracking, has been obviously improved the anti-bending strength and shock resistance of big-diameter pipeline；(2) sleeve is mounted on tube body by interference fit, no longer needs to the both ends with epoxy resin come seal sleeve, easy to operate, easy to accomplish, time saving and energy saving.
Description
Technical field
The present invention relates to a kind of restorative procedures of big-diameter pipeline, and in particular to one kind can make big-diameter pipeline have compared with
The steel epoxy sleeve method for renovation of good anti-bending strength and shock resistance, belongs to pipe rehabilitation technology field.
Background technique
The conveyance conduit of existing Hi-grade steel Large Diameter Pipeline to the reparation of defect requires that the trend being continuously improved is presented, and traditional
The shortcoming of defect of pipeline recovery technique become clear day by day.
Tube body defect mainly has four major class: metal loss, crackle, deformation, weld defect.Generally in conduit running process
In, the presence of boxing seam defect endangers maximum to conduit running, so grinding to the technics of repairing of boxing seam defect
Studying carefully is very important.
Currently, domestic common defect-restoration method therefor has: plate, the reparation of A jacket cylinder, the reparation of Type B sleeve, steel are mended in repair welding
The reparation of epoxy sleeve, composite repair add mechanical clamp, add liner, change pipe etc..For boxing seam defect, using most
More restorative procedures are: the reparation of Type B sleeve, steel epoxy sleeve reparation.
1, Type B sleeve reparation
The reparation that boxing seam defect is carried out using Type B sleeve, is had the following disadvantages:
(1) in the welding process, oil gas stopping transportation is needed；
(2) in the welding process, due to the presence of sweating heat, for inflammable and explosive oil-gas pipeline, it is easy to endanger
Danger；
(3) in the welding process, stringent to the requirement of temperature and humidity, hydrogen embrittlement otherwise easily occurs.
2, steel epoxy sleeve reparation
Steel epoxy sleeve has significant improvement compared to the reparation of Type B sleeve to the reparation of boxing seam defect, such as: it does not need
Carry out welding procedure, hydrogen embrittlement will not occur, still, due to be between steel epoxy sleeve and tube body carried out by epoxy resin it is close
Envelope, and the epoxy resin brittleness after condensing is higher, so when biggish deformation occurs for pipeline or when by violent impact, ring
Oxygen resin is just likely to that brittle cracking occurs, and steel epoxy sleeve is likely to be destroyed, this (wraps the overall performance of pipeline
Include: anti-bending strength, shock resistance) it will cause tremendous influence.
Summary of the invention
To solve the deficiencies in the prior art, the purpose of the present invention is to provide one kind, and big-diameter pipeline can be made to have preferably
Anti-bending strength and shock resistance steel epoxy sleeve method for renovation.
In order to achieve the above objectives, the present invention adopts the following technical scheme that:
A kind of steel epoxy sleeve method for renovation, which comprises the following steps:
Step1: epoxy resin is filled into thin-wall steel tube, is stood, is solidified epoxy resin, and epoxy grain pipe is formed；
Step2: chamfering is produced at the both ends of ordinary cartridge, forms the sleeve with chamfering；
Step3: by epoxy grain pipe according to most solid matter cloth in sleeve, the epoxy grain pipe and sleeve weld of inner layer, outer layer
Epoxy grain pipe and inner layer epoxy grain pipe weld；
Step4: the sleeve for being welded with epoxy grain pipe being placed vertically, the casting epoxy resin into sleeve, makes epoxy grain pipe
Gap between gap, epoxy grain pipe between sleeve and epoxy grain pipe is full of epoxy resin, stands, and keeps epoxy resin solidifying
Gu；
Step5: the sleeve for being poured epoxy resin being placed on bumper and is shaken, and epoxy resin is shatter；
Step6: reducing the temperature around tube body, makes tube body that shrinkage occur and covers sleeve under scheduled fitting temperature
On tube body, make sleeve and body abutment；
Step7: restoring the temperature around tube body, and sleeve and tube body, which are formed, to be interference fitted, and sleeve is fixed on tube body.
Steel epoxy sleeve method for renovation above-mentioned, which is characterized in that in Step1, the caliber of aforementioned thin-wall steel tube
For 50-60mm.
Steel epoxy sleeve method for renovation above-mentioned, which is characterized in that in Step2, the ratio of slope of aforementioned chamfering is
1:2。
Steel epoxy sleeve method for renovation above-mentioned, which is characterized in that in Step2, the sleeve of aforementioned strip chamfering
Wall thickness is 3/4-1 times of the wall thickness of tube body.
Steel epoxy sleeve method for renovation above-mentioned, which is characterized in that in Step5, the shaking force of bumper is adjusted,
Make the granularity 5-7mm of epoxy resin.
Steel epoxy sleeve method for renovation above-mentioned, which is characterized in that in Step6, aforementioned fitting temperature is < 10
℃。
The invention has the beneficial effects that:
(1) epoxy resin in sleeve exists in the form of granules, and is loaded in thin-wall steel tube one by one, group cyclization
Oxygen grain pipe, epoxy resin no longer exists with big plate-like structure, so brittle cracking will not occur, so as to avoid steel loop
A possibility that oxygen sleeve is destroyed because of epoxy resin brittle cracking, has been obviously improved the anti-bending strength and anti-impact of big-diameter pipeline
Hit performance；
(2) sleeve is mounted on tube body by interference fit, no longer needs to the both ends with epoxy resin come seal sleeve, is operated
It is convenient, it is easy to accomplish, it is time saving and energy saving.
Detailed description of the invention
Fig. 1 is the appearance diagram of the pipeline after repairing；
Fig. 2 is the cross-sectional view (only depicting a part of epoxy grain pipe) of the pipeline after repairing.
The meaning of appended drawing reference in figure: 1- tube body, 2- sleeve, 3- epoxy grain pipe, 4- girth joint, 5- flange.
Specific embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
Referring to Figures 1 and 2, steel epoxy sleeve method for renovation provided by the invention the following steps are included:
Step1: production epoxy grain pipe
Epoxy resin is filled into thin-wall steel tube, stands for 24 hours, solidifies epoxy resin, forms epoxy grain pipe 3.
The length of thin-wall steel tube is slightly more shorter than the length of sleeve 2, caliber 50-60mm.
Step2: sleeve of the production with chamfering
Chamfering is produced at the both ends of ordinary cartridge, the ratio of slope of chamfering is 1:2, forms the sleeve 2 with chamfering.
The wall thickness of sleeve 2 determines according to the wall thickness of tube body 1 to be repaired, generally 3/4-1 times of the wall thickness of tube body 1.
Step3: fixed epoxy grain pipe
By epoxy grain pipe 3 according to most solid matter cloth in sleeve 2, the epoxy grain pipe 3 and sleeve 2 of inner layer are welded, outer layer
The epoxy grain pipe 3 of epoxy grain pipe 3 and inner layer welds.
Step4: casting epoxy resin
The sleeve 2 for being welded with epoxy grain pipe 3 is placed in the horizontal plane vertically, the casting epoxy resin into sleeve 2 makes ring
Gap, epoxy grain pipe 3 between oxygen grain pipe 3 and sleeve 2 and the gap between epoxy grain pipe 3 are full of epoxy resin, stand for 24 hours,
Solidify epoxy resin.
Step5: shatter epoxy resin
The sleeve 2 for being poured epoxy resin is placed on bumper, by epoxy grain pipe 3 epoxy resin, be filled in
Epoxy resin between epoxy grain pipe 3 and sleeve 2 and the epoxy resin being filled between epoxy grain pipe 3 and epoxy grain pipe 3 shake
It is broken, the shaking force of bumper is adjusted, the granularity 5-7mm of epoxy resin is made.
The granularity of epoxy resin is smaller, can help to improve in this way the anti-of pipeline to avoid gap is formed between particle
Curved performance and shock resistance.
Step6: assembly sleeve
The removing of surface anticorrosion layer and grinding process are carried out to tube body 1 to be repaired, the temperature around tube body 1 is reduced, makes tube body 1
Shrinkage occurs by 2 sets of sleeve on tube body 1, is bonded sleeve 2 with tube body 1 under scheduled fitting temperature (10 DEG C of <).
Step7: fixes sleeve
Restore the temperature around tube body 1, heat expansion occurs than before for tube body 1, and sleeve 2 and tube body 1, which are formed, to be interference fitted, sleeve
2 are fixed on tube body 1.
Since the line of epoxy resin collapses coefficient≤0.05%, whole the collapsing of sleeve 2 be can be ignored, and tube body 1
The rate that collapses collapse rate much larger than sleeve 2, it is possible to sleeve 2 is fixed on tube body 1 by being interference fitted, no longer needs to use
Epoxy resin carries out the sealing at sleeve both ends, easy to operate, easy to accomplish, time saving and energy saving.
In addition, since the epoxy resin in sleeve 2 exists in the form of granules, and it is loaded on thin-wall steel tube one by one
In, epoxy grain pipe 3 is formed, epoxy resin no longer exists with big plate-like structure, so brittle cracking will not occur, to keep away
Exempt from a possibility that steel epoxy sleeve is destroyed because of epoxy resin brittle cracking, is obviously improved the bending resistance of big-diameter pipeline
Performance and shock resistance.
It should be noted that the above embodiments do not limit the invention in any form, it is all to use equivalent replacement or equivalent change
The mode changed technical solution obtained, falls within the scope of protection of the present invention.
Claims (6)
1. a kind of steel epoxy sleeve method for renovation, which comprises the following steps:
Step1: epoxy resin is filled into thin-wall steel tube, is stood, is solidified epoxy resin, and epoxy grain pipe is formed；
Step2: chamfering is produced at the both ends of ordinary cartridge, forms the sleeve with chamfering；
Step3: by epoxy grain pipe according to most solid matter cloth in sleeve, the epoxy grain pipe and sleeve weld of inner layer, the ring of outer layer
The welding of the epoxy grain pipe of oxygen grain pipe and inner layer；
Step4: the sleeve for being welded with epoxy grain pipe being placed vertically, the casting epoxy resin into sleeve, makes epoxy grain pipe and set
Gap, epoxy grain pipe between cylinder and the gap between epoxy grain pipe are full of epoxy resin, stand, solidify epoxy resin；
Step5: the sleeve for being poured epoxy resin being placed on bumper and is shaken, and epoxy resin is shatter；
Step6: reducing the temperature around tube body, makes tube body that shrinkage occur and covers sleeve in tube body under scheduled fitting temperature
On, make sleeve and body abutment；
Step7: restoring the temperature around tube body, and sleeve and tube body, which are formed, to be interference fitted, and sleeve is fixed on tube body.
2. steel epoxy sleeve method for renovation according to claim 1, which is characterized in that in Step1, the thin-walled
The caliber of steel pipe is 50-60mm.
3. steel epoxy sleeve method for renovation according to claim 1, which is characterized in that in Step2, the chamfering
The ratio of slope be 1:2.
4. steel epoxy sleeve method for renovation according to claim 1, which is characterized in that in Step2, the band is fallen
The wall thickness of the sleeve at angle is 3/4-1 times of the wall thickness of tube body.
5. steel epoxy sleeve method for renovation according to claim 1, which is characterized in that in Step5, adjustment vibration
The shaking force of platform makes the granularity 5-7mm of epoxy resin.
6. steel epoxy sleeve method for renovation according to claim 1, which is characterized in that in Step6, the assembly
Temperature is 10 DEG C of <.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477579.3A CN110315668B (en) | 2019-06-03 | 2019-06-03 | Novel steel epoxy sleeve repairing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477579.3A CN110315668B (en) | 2019-06-03 | 2019-06-03 | Novel steel epoxy sleeve repairing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110315668A true CN110315668A (en) | 2019-10-11 |
| CN110315668B CN110315668B (en) | 2021-04-20 |
Family
ID=68119418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910477579.3A Active CN110315668B (en) | 2019-06-03 | 2019-06-03 | Novel steel epoxy sleeve repairing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110315668B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361115A (en) * | 2020-09-29 | 2021-02-12 | 中国石油天然气集团有限公司 | Special-shaped sleeve for repairing fillet weld defect of B-shaped sleeve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417910A (en) * | 1991-10-31 | 1995-05-23 | Levesque; Michael D. | Method for securing flared or compression tube fittings |
| US5722463A (en) * | 1996-11-25 | 1998-03-03 | Petro-Line Upgrading Services Ltd. | External pipe reinforcing sleeve |
| US20040129373A1 (en) * | 2002-09-17 | 2004-07-08 | Nadarajah Nagendran A/L C. | Method and means of repairing a pipe |
| CN200949730Y (en) * | 2006-02-15 | 2007-09-19 | 北京华油天然气有限责任公司 | Clamp for restoring pipeline with epoxide resin injection method |
| CN109000083A (en) * | 2017-06-07 | 2018-12-14 | 中国石油天然气股份有限公司 | Method for repairing pipeline by using epoxy sleeve |
| CN109058658A (en) * | 2018-09-27 | 2018-12-21 | 江苏清源管道技术有限公司 | A kind of three layers of PE anticorrosion structure of joint coating on pipeline and construction technology |
-
2019
- 2019-06-03 CN CN201910477579.3A patent/CN110315668B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417910A (en) * | 1991-10-31 | 1995-05-23 | Levesque; Michael D. | Method for securing flared or compression tube fittings |
| US5722463A (en) * | 1996-11-25 | 1998-03-03 | Petro-Line Upgrading Services Ltd. | External pipe reinforcing sleeve |
| US20040129373A1 (en) * | 2002-09-17 | 2004-07-08 | Nadarajah Nagendran A/L C. | Method and means of repairing a pipe |
| CN200949730Y (en) * | 2006-02-15 | 2007-09-19 | 北京华油天然气有限责任公司 | Clamp for restoring pipeline with epoxide resin injection method |
| CN109000083A (en) * | 2017-06-07 | 2018-12-14 | 中国石油天然气股份有限公司 | Method for repairing pipeline by using epoxy sleeve |
| CN109058658A (en) * | 2018-09-27 | 2018-12-21 | 江苏清源管道技术有限公司 | A kind of three layers of PE anticorrosion structure of joint coating on pipeline and construction technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361115A (en) * | 2020-09-29 | 2021-02-12 | 中国石油天然气集团有限公司 | Special-shaped sleeve for repairing fillet weld defect of B-shaped sleeve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110315668B (en) | 2021-04-20 |
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