CN107255204B - A kind of non-stop plugging technique for the leakage of gas pipeline crack formula - Google Patents
A kind of non-stop plugging technique for the leakage of gas pipeline crack formula Download PDFInfo
- Publication number
- CN107255204B CN107255204B CN201710613965.1A CN201710613965A CN107255204B CN 107255204 B CN107255204 B CN 107255204B CN 201710613965 A CN201710613965 A CN 201710613965A CN 107255204 B CN107255204 B CN 107255204B
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- Prior art keywords
- leakage
- section
- crack
- gas pipeline
- shell
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- 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
-
- 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
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/163—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a ring, a band or a sleeve being pressed against the inner surface 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
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
- F16L55/1654—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section and being inflated
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a kind of non-stop plugging techniques for the leakage of gas pipeline crack formula, glue filling is carried out in leakage crack intersegmental part, the closure of leakage crack section is completed in such a way that glue curing forms cock body, with preferable plugging effect, combustion gas is avoided to cause secondary gas leakage there is a situation where patch loosens by leaking crack intersegmental part and impact to the patch on its surface；It is inserted by shell, enabling patch, deformation occurs, and it is embedded patch partial region and enters to inside leakage crack intersegmental part and gas pipeline, pass through fracture propagation before patch deformation, shell is enabled to be relatively easy to be inserted into inside crack, on the one hand the patch being embedded into leakage crack intersegmental part plays the role of partition, glue can be effectively avoided to be directly injected into leakage crack intersegmental part situation about causing to leak out to inside gas pipeline, on the other hand it is matched with shell and plays the role of cavity, for placing glue and being smoothly formed by curing cock body.
Description
Technical field
The present invention relates to gas pipeline maintenance technique fields, are used for gas pipeline crack formula more specifically to one kind
The non-stop plugging technique of leakage.
Background technique
Gas pipeline is all that be embedded in underground be buried-pipe laying under normal circumstances, does not allow mostly to be safely operated
Aerial laying.Though buried-pipe laying can play a protective role to pipeline, agricultural tillage and ground mankind's activity are not influenced, due to
Natural cause (such as pipeline spontaneous corrosion, chemical attack) or artificial origin (such as drill, dig a well, driving piles, pushing to machine digging
It is first-class) gas pipeline that often results in buried-pipe laying generates either large or small crack, lead to gas leakage.Gas has
Inflammable, explosive and toxic feature just must be in the shortest possible time once fuel gas leaks in gas pipeline
Leak stopping processing is carried out, prevents combustion gas from largely leaking, to guarantee the normal production and living of city dweller and personal safety.
Common blocking method is to be initially switched off gas source, and the gas in gas pipeline is drained, and is then carried out at welding leak repairing
Reason.The drawbacks of this method is: consuming time is long, the combustion gas resource of waste preciousness, pollutes environment and seriously affects people just
Often life.
The patent document of Publication No. CN101862883B discloses a kind of fuel gas pipeline leakage pressurized blocking welding method
It is related to a kind of gas pipeline plugging welding method.The step of non-stop plugging welding method: by the combustion gas of leakage point or leakage seam section
Pipeline cleaning is clean；Semi arch fixture is made, patch piece is pasted on fixture, fixture is installed on away from leakage 1-2 meters
Gas pipeline on, fixture is axially pushed along pipeline, until at pipe leakage；It is symmetrically to balanced gradually clamping screw,
In the end spot welding semi-circular baffle of fixture, gas pipeline at semi-circular baffle and leakage is interrupted welding, last shape in two steps
Integral closing welding bead after carrying out leak detection and preservative treatment, completes backfill.
Above-mentioned technical proposal carries out the sealing at fuel gas pipeline leakage by way of pasting patch, but patch is needle
Surface at leakage is blocked, and at leakage inside do not blocked effectively, due to inside gas pipeline always
Circulation has a combustion gas, and combustion gas can be impacted by the patch on its surface inside at leakage, with the extension of use time, patch
The case where loosening, gas secondary is be easy to cause to leak, there are improvements for the prior art.
Summary of the invention
It is a kind of for the leakage of gas pipeline crack formula in view of the deficiencies of the prior art, the present invention intends to provide
Non-stop plugging technique, which effectively blocks fuel gas pipeline leakage crack intersegmental part, has preferable
Plugging effect can slow down the case where gas secondary leaks.
To achieve the above object, the present invention provides the following technical scheme that it is a kind of for gas pipeline crack formula leakage
Non-stop plugging technique, which is characterized in that non-stop plugging technique specific steps are as follows:
Step A, the ambient substance excavation that the gas pipeline of leakage crack section occurs is opened, exposes the combustion gas of leakage crack section
Pipeline is simultaneously clean by its removing surface；
Step B, production one can cover the patch of leakage crack section, and patch is fitted in leakage crack section by viscose glue
Top；
Step C, by tapping leakage crack section surface, so that the crack diameter of leakage crack section obtains a degree of expansion
, the leakage crack section after expansion is still located in patch overlay area；
Step D, the long strip type shell equal with leakage crack segment length of production one, in fuel gas pipeline leakage section in insertion
Shell is stated, patch is made of elastic material, and in insertion process, deformation occurs for patch, and part-structure, which is embedded, to be entered to leakage and split
It stitches in section and gas pipeline, above-mentioned shell and the patch that deformation occurs collectively form a cavity；
Step E, one end that shell enters to leakage crack intersegmental part, which is connected with, forms clamping limit with gas pipeline inner wall
Clamping section, to realize that shell is formed radially fixation along gas pipeline；
Step F, portion carries out the filling of intumescent glue in the cavity, and filled intumescent glue curing forms cock body, swollen
Volume increases swollen type glue in the curing process, and then makes shell and leak the side abutting of crack section；
Step G, it after carrying out necessary leak detection and preservative treatment, is backfilled, the gas pipeline for leaking crack section is buried
In underground.
By using above-mentioned technical proposal, compared with prior art, glue filling is carried out in leakage crack intersegmental part, is passed through
The mode that glue curing forms cock body completes the closure of leakage crack section, has preferable plugging effect, avoids combustion gas by letting out
Leakage crack intersegmental part is impacted to the patch on its surface and there is a situation where patch loosenings to cause secondary gas leakage；Pass through shell
Body insertion, enabling the patch with certain elasticity, deformation occurs, and is embedded patch partial region and enters to leakage crack
Inside intersegmental part and gas pipeline, by fracture propagation before patch deformation, shell is enabled to be relatively easy to be inserted into
To crack, on the one hand the patch being embedded into leakage crack intersegmental part plays the role of partition, can effectively avoid glue straight
It connects and is injected into leakage crack intersegmental part and causes to leak out to situation inside gas pipeline, on the other hand matched with shell and play appearance
The effect of chamber, for placing glue and being smoothly formed by curing cock body；Glue is specially intumescent glue, in the curing process
Volume increases, and can be full of inside cavity, and then pushes against shell and the side of leakage crack section.
The present invention is further arranged to: the patch in step B is in long strip type laminated structure, and the patch includes edge
The deformation section in crack segment length direction is leaked, deformation section is located at right above the section of leakage crack, and deformation section cross section is in " Ω "
Shape.
By using above-mentioned technical proposal, the setting of deformation section enable patch be smoothly embedded enter to leakage crack
Intersegmental part, deformation section cross section is in " Ω " structure before shell insertion, and after shell insertion, deformation section cross section is in inversion
" Ω " structure.
The present invention is further arranged to: the patch is made of elastomeric.
By using above-mentioned technical proposal, patch made of elastomeric can also while having preferably elasticity
Preferable structural strength is kept, service life is conducive to extend.
The present invention is further arranged to: the V-shaped structure of housing cross-sectional, the shell of V-structure include top and
Two free ends, above-mentioned clamping section connect one to one with free end, and before shell is inserted into leakage crack section, two free ends are logical
It crosses harness locking realization to draw close, after shell is inserted into leakage crack section, harness is dismantled, so that two free ends are according to self structure
Deformation occurs, and two free ends are located remotely from each other, so that clamping section extends and gas pipeline inner wall card towards leakage crack section two sides
It connects.
By using above-mentioned technical proposal, before shell is inserted into leakage crack section, two free ends are locked real by harness
It now draws close, can effectively shorten shell along the distance of leakage crack section width direction, be smoothly inserted into convenient for shell；Work as shell
After the section of insertion leakage crack, two free ends are located remotely from each other, so that corresponding clamping section is smoothly towards leakage crack on free end
Section two sides extend, and then complete the abutting of clamping section and gas pipeline inner wall, since clamping section is connected with free end, Jin Ershi
Limit of the existing shell along gas pipeline radial direction.
The present invention is further arranged to: the clamping section is in long strip type laminated structure, and clamping section is abutted with gas pipeline
Several protrusions are also distributed in surface, and the protrusion is extensible to be embedded in gas pipeline inner wall.
By using above-mentioned technical proposal, the clamping section of long strip type laminated structure can preferably with leakage crack section two sides
Gas pipeline inner wall abut against adaptation, when block complete after, combustion gas generates certain air pressure inside gas pipeline, for shape
Become section, cock body and shell and have the thrust outside to leakage crack section, and is clamped section and is connected to gas pipeline inner wall, Neng Gouqi
To position-limiting action, bulge-structure, which extends, is embedded in the connection that gas pipeline inner wall is conducive to reinforce clamping section and gas pipeline inner wall
Limit strength improves the stability of limit.
The present invention is further arranged to: the leakage crack intersegmental part glue filling in step F is realized by capsule, in shell
It is internally provided with capsule, intumescent glue is filled in capsule, makes capsules break in capsule by external force, and then make
It obtains glue and fills full entire inside cavity.
It is formd between shell and deformation section after shell is inserted into leakage crack section by using above-mentioned technical proposal
Cavity, intumescent glue is filled in portion by way of capsules break in the cavity, and capsule structure is simple, convenient to carry out.
The present invention is further arranged to: the capsule is fixedly connected on inner walls, when dismantling harness, two free ends according to
Deformation occurs for self structure, and when two free ends are located remotely from each other, the capsule for being fixed on inner walls is ruptured by pulling force, completes glue
Filling.
It will pull power using shell self structure deformation by using above-mentioned technical proposal and act on capsule, complete capsule
The process of rupture is conducive to simplify process, shortens the process of closure, and then improve working efficiency.
The present invention is further arranged to: the housing tip is arranged in circular arc planar.
By using above-mentioned technical proposal, stress can be effectively reduced in the housing tip of circular arc planar and is concentrated, so that shell
The two sides free end of body can be relatively easy to that deformation occurs, while arc surface also has preferable safety, avoids work people
Accidental injury when member's operation.
In conclusion the invention has the following advantages:
First, the technique can be realized non-stop plugging, avoiding combustion gas from closing influences life, advantageously reduce maintenance cost with
And loss caused by gas leakage；
Second, the technique has carried out effective closure to fuel gas pipeline leakage crack intersegmental part, and utilize the knot of shell itself
The deformation of structure is realized to the limit for cock body after internal block, avoids cock body from being extruded by gas pipeline air pressure inside and leak
Crack section is formed by cock body using shell and intumescent glue, realizes dual-plugging, has preferable plugging effect, energy
Enough the case where effectively slowing down secondary leakage generations.
Detailed description of the invention
Fig. 1 is embodiment partial structural diagram, is mainly used for embodying the state that patch is attached on gas pipeline；
Fig. 2 is the structural schematic diagram of embodiment shell；
Fig. 3 be embodiment partial sectional view, be mainly used for embody patch deformation section do not enter to leakage crack section when
State；
Fig. 4 is the partial sectional view of embodiment, is mainly used for embodying the state for completing to block leakage crack section later.
Appended drawing reference: 1, crack section is leaked；2, patch；21, deformation section；3, shell；31, it is clamped section；32a, top；32b,
Free end；4, cock body；5, capsule；6, harness；7, raised.
Specific embodiment
The embodiment of the present invention is described further referring to figs. 1 to Fig. 4.
As shown in Figure 1, a kind of non-stop plugging technique for the leakage of gas pipeline crack formula, non-stop plugging technique specifically walk
Suddenly are as follows:
Step A, the ambient substance excavation that the gas pipeline of leakage crack section 1 occurs is opened, exposes the combustion of leakage crack section 1
Feed channel is simultaneously clean by its removing surface.
Step B, as shown in connection with fig. 3, production one can cover the patch 2 of leakage crack section 1, and patch 2 is passed through viscose glue
It is fitted in 1 top of leakage crack section, patch 2 is in specifically long strip type laminated structure, in order to preferably realize the shape in 2 later period of patch
Become, it is contemplated that the strength of materials and cost, first patch 2 are made of elastomeric, and secondly above-mentioned patch 2 includes edge
The deformation section 21 of crack 1 length direction of section is leaked, deformation section 21 is located at right above leakage crack section 1, and 21 cross section of deformation section is in
" Ω " shape.
Step C, by tap leakage crack section 1 surface so that leakage crack section 1 crack diameter obtain it is a degree of
Expansion, the leakage crack section 1 after expansion are still located in 2 overlay area of patch.
Step D, as shown in connection with fig. 2, the long strip type shell 3 of production one and leakage crack 1 equal length of section, in gas pipeline
The above-mentioned shell 3 of insertion in section is leaked, patch 2 is made of elastic material, and in insertion process, deformation occurs for patch 2, part-structure
It is embedded and enters in leakage crack section 1 and gas pipeline, above-mentioned shell 3 collectively forms a cavity with the patch 2 that deformation occurs.
Step E, as shown in connection with fig. 4, shell 3 enter to leakage crack section 1 inside one end be connected with in gas pipeline
Wall forms the clamping section 31 of clamping limit, to realize the radially fixed of shell 3 and gas pipeline；
The V-shaped structure in 3 cross section of shell, after actual installation, shell 3 is relative to its cross section of gas pipeline in inverted
V-structure, the shell 3 of above-mentioned V-structure include top 32a and two free end 32b, and clamping section 31 and free end 32b are one by one
Be correspondingly connected with, can be smoothly entered to gas pipeline in order to be clamped section 31, when shell 3 be inserted into leakage crack section 1 it
Before, two free end 32b are realized by the locking of harness 6 and are drawn close, after shell 3 is inserted into leakage crack section 1, harness 6 is dismantled, so that
Deformation occurs according to self structure by two free end 32b, and two free end 32b are located remotely from each other, so that clamping section 31 is split towards leakage
Seam 1 two sides of section extend to be connected and fixed with the formation of gas pipeline inner wall.
Be clamped section 31 be in long strip type laminated structure, enable clamping section 31 preferably with leakage crack section 1 two sides combustion
Feed channel inner wall abuts against adaptation, and after blocking completion, combustion gas generates certain air pressure inside gas pipeline, for deformation section
21, cock body 4 and shell 3 have to leakage crack 1 outside thrust of section, and are clamped section 31 and are connected to gas pipeline inner wall, energy
Position-limiting action is enough played, in order to further increase the stability that clamping section 31 and gas pipeline contact, in clamping 31 table of section
Face is provided with several raised 7, after clamping section 31 is installed, and raised 7 structures are under prolonged air pressure promotion, Neng Gouyan
It stretches and is embedded in gas pipeline inner wall.
Step F, portion carries out the filling of intumescent glue in the cavity, and filled intumescent glue curing forms cock body 4, swollen
Volume increases swollen type glue in the curing process, and then makes shell 3 and leak the side abutting of crack section 1；
The section 1 inside glue filling of leakage crack is achieved especially by the form that capsule 5 ruptures, and is set inside shell 3
It is equipped with capsule 5, intumescent glue is filled in inside capsule 5, and above-mentioned capsule 5 is fixedly connected on 3 inner wall of shell, when dismantling harness
Deformation occurs according to self structure by 6, two free end 32b, when two free end 32b are located remotely from each other, is fixed on the capsule of 3 inner wall of shell
5 are ruptured by pulling force, so that glue fills full entire inside cavity, complete the filling of glue.
The top 32a of above-mentioned shell 3 is arranged in circular arc planar, stress concentration can be effectively reduced, so that the two sides of shell 3
Free end 32b can be relatively easy to that deformation occurs, while arc surface also has preferable safety, and staff is avoided to operate
When accidental injury.
Step G, it after carrying out necessary leak detection and preservative treatment, is backfilled, the gas pipeline for leaking crack section 1 is buried
In underground.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of non-stop plugging technique for the leakage of gas pipeline crack formula, which is characterized in that non-stop plugging technique specifically walks
Suddenly are as follows:
Step A, the ambient substance excavation that the gas pipeline of leakage crack section (1) occurs is opened, exposes the combustion of leakage crack section (1)
Feed channel is simultaneously clean by its removing surface；
Step B, production one can cover the patch (2) of leakage crack section (1), and patch (2) is fitted in leakage by viscose glue
Above crack section (1)；
Step C, by tap leakage crack section (1) surface so that leakage crack section (1) crack diameter obtain it is a degree of
Expansion, the leakage crack section (1) after expansion are still located in patch (2) overlay area；
Step D, the long strip type shell (3) of production one and leakage crack section (1) equal length, is inserted into fuel gas pipeline leakage section
Above-mentioned shell (3), patch (2) is made of elastic material, and in insertion process, deformation occurs for patch (2), part-structure be embedded into
Enter to leakage crack section (1) and gas pipeline, above-mentioned shell (3) and the patch (2) that deformation occurs collectively form a cavity；
Step E, shell (3) enters to the internal one end of leakage crack section (1) and is connected with and gas pipeline inner wall formation clamping limit
The clamping section (31) of position, to realize that shell (3) is formed radially fixation along gas pipeline；
Step F, portion carries out the filling of intumescent glue in the cavity, and filled intumescent glue curing forms cock body (4), expansion
Volume increases type glue in the curing process, and then makes shell (3) and leak the side abutting of crack section (1)；
Step G, it after carrying out necessary leak detection and preservative treatment, is backfilled, the gas pipeline for leaking crack section (1) is embedded in
Underground.
2. a kind of non-stop plugging technique for the leakage of gas pipeline crack formula according to claim 1, which is characterized in that
The patch (2) in step B is in long strip type laminated structure, and the patch (2) includes along leakage crack section (1) length direction
Deformation section (21), deformation section (21) be located at leakage crack section (1) right above, deformation section (21) cross section be in " Ω " shape.
3. a kind of non-stop plugging technique for the leakage of gas pipeline crack formula according to claim 1, which is characterized in that
The patch (2) is made of elastomeric.
4. a kind of non-stop plugging technique for the leakage of gas pipeline crack formula according to claim 1, which is characterized in that
The V-shaped structure in shell (3) cross section, the shell (3) of V-structure include top (32a) and two free ends (32b), on
The clamping section (31) stated connects one to one with free end (32b), and before shell (3) are inserted into leakage crack section (1), two freely
End (32b) is realized by harness (6) locking and is drawn close, and after shell (3) are inserted into leakage crack section (1), dismantle harness (6), makes
Obtaining two free ends (32b), deformation occurs according to self structure, and two free ends (32b) is located remotely from each other, so that clamping section (31)
Extend towards leakage crack section (1) two sides and is clamped with gas pipeline inner wall.
5. a kind of non-stop plugging technique for the leakage of gas pipeline crack formula according to claim 4, which is characterized in that
The clamping section (31) is in long strip type laminated structure, and several protrusions are also distributed in the surface that clamping section (31) is abutted with gas pipeline
(7), described raised (7) are extensible is embedded in gas pipeline inner wall.
6. a kind of non-stop plugging technique for the leakage of gas pipeline crack formula according to claim 5, which is characterized in that
The internal glue filling of leakage crack section (1) in step F is realized by capsule (5), is internally provided with capsule (5) in shell (3),
Intumescent glue is filled in capsule (5) inside, by external force in capsule (5), so that capsule (5) ruptures, so that glue
Water fills full entire inside cavity.
7. a kind of non-stop plugging technique for the leakage of gas pipeline crack formula according to claim 6, which is characterized in that
The capsule (5) is fixedly connected on shell (3) inner wall, and when dismantling harness (6), two free ends (32b) occurs according to self structure
Deformation, when two free ends (32b) is located remotely from each other, the capsule (5) for being fixed on shell (3) inner wall is ruptured by pulling force, completes glue
Filling.
8. a kind of non-stop plugging technique for the leakage of gas pipeline crack formula according to claim 7, which is characterized in that
Shell (3) top (32a) is arranged in circular arc planar.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710613965.1A CN107255204B (en) | 2017-07-25 | 2017-07-25 | A kind of non-stop plugging technique for the leakage of gas pipeline crack formula |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710613965.1A CN107255204B (en) | 2017-07-25 | 2017-07-25 | A kind of non-stop plugging technique for the leakage of gas pipeline crack formula |
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| CN107255204A CN107255204A (en) | 2017-10-17 |
| CN107255204B true CN107255204B (en) | 2019-02-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869946A (en) * | 2018-09-29 | 2018-11-23 | 天津卓达管道机械制造有限公司 | A kind of gas pipeline temporary blocking device |
| CN110486566A (en) * | 2019-09-20 | 2019-11-22 | 郑州大学 | Pipe pressurized leak stopping stopping device, Combined joint, pipe pressurized blocking method |
| CN111520570B (en) * | 2020-06-01 | 2022-05-10 | 青岛海弗莱安全科技有限公司 | Pipeline pressure leaking stoppage repairing and double-layer long-acting anti-corrosion device and construction method thereof |
| CN117212674B (en) * | 2023-09-18 | 2024-03-08 | 山东义丰环保机械股份有限公司 | Pressure vessel with leak detection and temporary plugging functions |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2164011C (en) * | 1995-11-29 | 1999-05-25 | Robert James Smyth | External pipe reinforcing sleeve |
| CN103267200B (en) * | 2013-05-30 | 2016-11-02 | 公安部上海消防研究所 | A kind of online Quick leaking stoppage nail with pressure of fire hose and rapid plugging method for fiberglass |
| CN203463862U (en) * | 2013-09-16 | 2014-03-05 | 东营市鸿祥石油技术开发有限公司 | Pressure plugging device |
| CN103851302B (en) * | 2014-03-31 | 2016-03-09 | 河北联合大学 | The Quick leak stoppage apparatus of pipeline, container |
| CN204852764U (en) * | 2015-06-09 | 2015-12-09 | 中国石油化工股份有限公司 | Two -sided plugging device |
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