CN103629474A - Connection aqueduct used for repairing damaged cast iron firefighting pipe and repairing method thereof - Google Patents
Connection aqueduct used for repairing damaged cast iron firefighting pipe and repairing method thereof Download PDFInfo
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- CN103629474A CN103629474A CN201210297260.0A CN201210297260A CN103629474A CN 103629474 A CN103629474 A CN 103629474A CN 201210297260 A CN201210297260 A CN 201210297260A CN 103629474 A CN103629474 A CN 103629474A
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- pipe
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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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Abstract
A connection aqueduct used for repairing a damaged cast iron firefighting pipe comprises substitute end pipes (2), horseshoe elbows (3) and a substitute middle pipe (4) and is characterized in that the substitute end pipes (2) are arranged outside two end openings in a sleeved mode, wherein the two end openings are formed after the damaged pipe is cut off; the two ends of the substitute middle pipe (4) are fixed to the substitute end pipes (2) through the horseshoe elbows (3) in a welded mode, and a choke plug (5) is installed under the substitute middle pipe (4). The connection aqueduct used for repairing the damaged cast iron firefighting pipe and the repairing method of the connection aqueduct have the advantages that the connection aqueduct is simple in structure and convenient to manufacture, the technical problems that due to water remaining in a drainage pipe, water pressure is generated in the pipe during the construction of a connector and an opening cannot be formed due to existence of the water are solved, repairing engineering quality of the firefighting pipe is guaranteed, safety and reliability are achieved, and the percent of pass reaches 100%.
Description
Technical field
The present invention relates to a kind of damaged pipe restorative procedure, specifically, is a kind of for repairing connection aqueduct and the restorative procedure thereof of impaired cast iron fire protection pipeline.
Background technique
The existing fire fighting device of Baosteel plant area built up so far about approximately 30 years, and mostly was cast-iron pipe (intensity is high, poor toughness), through using majority aging for many years.In work progress, often have the situation that fire protection pipeline fracture occurs, and fire valve cannot close completely, repairing construction is very difficult.Conventional cast iron fire protection pipeline restorative procedure need block water in fracture pipeline completely, the pipeline damaging is repaired in excavation underground valve region, cause thus environmental disruption, and produce higher rehabilitation expense, especially those damage the situation that in pipeline, residual water cannot block completely and cause the awkward situation that cannot repair.
Therefore known cast iron fire protection pipeline restorative procedure exists above-mentioned all inconvenience and problem.
Summary of the invention
Object of the present invention, be to propose a kind of residual water that makes cannot to dam in fire-prevention pipe derive pipeline for repairing the connection aqueduct of impaired cast iron fire protection pipeline.
Another object of the present invention, be to propose a kind of residual water that makes cannot to dam in fire-prevention pipe derive pipeline for repairing the restorative procedure of the connection aqueduct of impaired cast iron fire protection pipeline.
For achieving the above object, technical solution of the present invention is:
For repairing a connection aqueduct for impaired cast iron fire protection pipeline, comprise and replace end pipe, water chestnut is curved and replace intervalve, it is characterized in that:
Described replacement end pipe is inserted in respectively outside two ports after damaged pipe cuts off;
The two ends of described replacement intervalve are welded and fixed with replacing end pipe by water chestnut is curved respectively, and under replacement intervalve, plug are installed.
Of the present inventionly for repairing the connection aqueduct of impaired cast iron fire protection pipeline, can also be further achieved by the following technical measures.
Aforesaid for repairing the connection aqueduct of impaired cast iron fire protection pipeline, wherein said replacement end pipe, water chestnut material curved and replacement intervalve is seamless steel pipe.
Aforesaid for repairing the connection aqueduct of impaired cast iron fire protection pipeline, the length of wherein said replacement end pipe can determine according to piping failure degree to be repaired.
Aforesaid for repairing the connection aqueduct of impaired cast iron fire protection pipeline, the diameter of wherein said replacement end pipe is than more than the large 20mm of the diameter of impaired cast iron fire protection pipeline.
Aforesaid for repairing the connection aqueduct of impaired cast iron fire protection pipeline, wherein said water chestnut is curved is that 30 degree water chestnuves are curved.
Aforesaid for repairing the connection aqueduct of impaired cast iron fire protection pipeline, the diameter of wherein said plug can be determined according to the residual water flow in impaired cast iron fire protection pipeline.
For repairing a restorative procedure for the connection aqueduct of impaired cast iron fire protection pipeline, it is characterized in that comprising the following steps:
A, the impaired part of pipeline is cut off;
B, outside the port at pipe cutting place, each cover unification is replaced end pipe and is formed a socket joint and connect;
The assembly parts of intervalve is replaced in c, making
At replacement intervalve two ends, weld respectively water chestnut curved, and under replacement intervalve, plug is installed and is made the assembly parts of replacing intervalve;
The assembly parts of intervalve is replaced in d, installation welding
The curved installation of water chestnut of replacing the assembly parts two ends of intervalve is welded to and replaces end pipe;
E, socket joint connect the conventional measure that adopts asbestos cement interface
F, adopt Clay coating mouth of pipe maintenance or often water moistening, at least maintenance pressure testing after 24 hours;
Before g, backfill, carry out pitch preservative treatment
Before backfill, carry out the pitch preservative treatment that connects aqueduct.
Of the present inventionly for repairing the restorative procedure of the connection aqueduct of impaired cast iron fire protection pipeline, can also be further achieved by the following technical measures.
Aforesaid method, in wherein said step b, replaces end pipe and will reach in being connected with burst pipe socket joint in pipe in pipe, makes ligament even.
Aforesaid method, wherein replaces ligament >=10mm that end pipe is connected with burst pipe socket joint.
Aforesaid method, in wherein said step f, before pressure testing, plug is held open state.
Adopt after technique scheme, of the present inventionly for repairing connection aqueduct and the restorative procedure thereof of impaired cast iron fire protection pipeline, have the following advantages:
1, connection aqueduct structure is simple, easy to make, and in drainage pipe, residual hydrolysis has been determined, and interface construction period pipeline is interior to be produced water pressure and have water cannot beat the technical barrier of mouth;
2, fire protection pipeline reinstatement works quality safety reliably obtains 100% up-to-standard rate effect.
Accompanying drawing explanation
Fig. 1 is the connection aqueduct installment state schematic diagram of the embodiment of the present invention.
In figure: 1 burst pipe, 2 replace pipeline, and 330 degree water chestnuves are curved, and 4 replace intermediate conduit, 5 plugs.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is illustrated further.
A kind of for repairing the connection aqueduct of impaired cast iron fire protection pipeline
Fig. 1 is the connection aqueduct installment state schematic diagram of the embodiment of the present invention.As shown in the figure, described replacement end pipe 2 is inserted in respectively outside two ports after impaired burst pipe 1 is cut off;
The two ends of described replacement intervalve 4 are welded and fixed by water chestnut curved 3 and replacement end pipe 2 respectively, and under replacement intervalve 4, plug 5 are installed, wherein: described replacement end pipe 2, the material of water chestnut curved 3 and replacement intervalve 4 is seamless steel pipes; The length of described replacement end pipe 2 can determine according to piping failure degree to be repaired; The diameter of described replacement end pipe 2 is than more than the large 20mm of the diameter of impaired cast iron fire protection pipeline; Described water chestnut curved 3 is that 30 degree water chestnuves are curved; The size of described plug 5 can be determined according to the residual water flow in impaired cast iron fire protection pipeline.
A kind of for repairing the connection aqueduct restorative procedure of impaired cast iron fire protection pipeline
The environment of living in of impaired cast iron fire protection pipeline
In seamless steel tubing mill's discharge of wastewater Introduction of The Comprehensive Regulating Works (bid section 1) waste water oil interceptor engineering, waste water oil interceptor is positioned at crossing, Wu San road, Baosteel plant area Woof five road, by northern adjacent 9# sewage pound station, and southern adjacent fire water pipeline, north-south clear distance is 8.5m only.Waste water oil interceptor north-south width 7.3m, buried depth-6.000m, according to on-site actual situations, south and north flanks can only adopt steel sheet pile supporting, and at be positioned at-2.000m place, interval 6m arranges support; Thing both sides 1:1 secondary is put slope excavation.The outer span fire protection pipeline outer wall of southern side steel sheet pile is 200mm only.Construction period (on May 30,1 day to 2012 April in 2012), this fire protection pipeline is because of side direction soil body extrusion fracture 2 times.
This fire protection pipeline breaking part is positioned at place, crossing, Woof five road, Wu San road; Valve is positioned at by Woof five road, the valve degree of depth approximately-2.000m, valve numbering D-18.This valve cannot be closed completely.
According to Baosteel plant area relevant regulations, fire protection pipeline fracture must be repaired in 48 hours.Adopt traditional cast-iron pipe recovery technique to carry out the reparation of this fire protection pipeline, valve region must be excavated to the valve place degree of depth, the foreign material such as cleaning mud, completely throttle down.If adopt this way: the first, Woof five road is that Baosteel major trunk roads, valve region are close to Hu Chang river, periphery is 20 years above pine trees of the age of tree, does not possess excavation condition; The second, the engineering time certainly will extend; The 3rd, increase the correlative charges that valve region excavates and recovers.
Apply of the present invention for repairing the preparation process of restorative procedure of the connection aqueduct of impaired cast iron fire protection pipeline:
Utilize the DH55 type digging machine excavation fire protection pipeline region of fracture to-1.700m, the following earthing of-1.700m adopts hand excavation to-2.500m, and assurance fire protection pipeline minimum point has at least operating space of 300mm at the bottom of foundation ditch.300*300*300 sump is set in foundation ditch, utilizes water pump to draw water at any time, guarantee the front foundation ditch inner drying of pressure testing.
Apply and of the present inventionly for repairing the concrete measure of restorative procedure of the connection aqueduct of impaired cast iron fire protection pipeline, comprise the following steps:
A, the impaired part of pipeline is cut off, removed the foreign material such as socket joint connection mouth inner burr, dirt and earth, check cast iron tube and connecting tube, guarantee tubing flawless and other defect.
B, outside the port at pipe cutting place, each cover unification is replaced end pipe 2 and is formed socket joints and connect; The length of replacing end pipe 2 is 300mm.Replace end pipe 2 and will reach in being connected with burst pipe 1 socket joint in pipe in pipe, make ligament even, replace and hold that to manage 2 ligaments that are connected with burst pipe 1 socket joint be 10mm.
The assembly parts of intervalve 4 is replaced in c, making
Replacing intervalve 4 two ends, to weld respectively water chestnut curved 3, and replace intervalve 4 under plug 5 be installed made the assembly parts of replacing intervalve 4; Wherein replace intervalve 4 length 300mm, water chestnut curved 3 is that 30 degree water chestnuves are curved, length 100mm, plug 5 diameter 50mm.
The assembly parts of intervalve 4 is replaced in d, installation welding
The water chestnut curved 3 of replacing the assembly parts two ends of intervalve 4 is installed to be welded to and replace end pipe 2.
E, socket joint connect the conventional measure that adopts asbestos cement interface, comprise the following steps:
1) fiber crops of buying oil: flax silk is twisted into diameter than mouth of pipe gap large 1.5 times, and the solid flax silk thigh of the long 100～150mm of Length Ratio pipe cylindrical is squeezed in gap a few, accounts for 1/3 of the whole interface degree of depth.
2) break asbestos cement: the label of cement should be not less than 425#, asbestos wool should be greater than level Four.Asbestos are 3:7(weight ratio with the ratio of cement), after stirring, add the water of gross weight 10～15%, be kneaded into damp state, can pinch with hand agglomeratingly, throw away and loosely just can use.Asbestos cement layered tamping, and beat with hand hammer, adopt the construction of " three fill out six dozens " method, often fill out one deck ash and beat reality twice, fill out altogether three times.Mixture must be finished in 1 hour, and residue is abandoned.Finally fill up and beat reality to smooth surface, be iron cyan.
F, adopt Clay coating mouth of pipe maintenance or often water moistening, at least maintenance pressure testing after 24 hours, before pressure testing, plug 5 is held open state.
Before g, backfill, carry out pitch preservative treatment
Before backfill, carry out the pitch preservative treatment that connects aqueduct.
Of the present invention for repairing the connection aqueduct of impaired cast iron fire protection pipeline and restorative procedure thereof by the improvement to cast iron fire protection pipeline recovery technique, residual water in drainage pipe, solved in interface construction period pipeline and produced water pressure and have water cannot beat the technical barrier of mouth, guaranteed interface construction quality.In the repairing effect contrast of the fire protection pipeline to application enhancements technology and original technology are repaired respectively, the fire protection pipeline that application enhancements technology is repaired, up-to-standard rate is 100%.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or variation.Therefore, all technological schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (10)
1. for repairing a connection aqueduct for impaired cast iron fire protection pipeline, comprise and replace end pipe (2), water chestnut curved (3) and replacement intervalve (4), is characterized in that:
Described replacement end pipe (2) is inserted in respectively outside two ports after damaged pipe cuts off;
The two ends of described replacement intervalve (4) are welded and fixed with replacing end pipe (2) by water chestnut curved (3) respectively, and under replacement intervalve (4), plug (5) are installed.
2. as claimed in claim 1ly for repairing the connection aqueduct of impaired cast iron fire protection pipeline, it is characterized in that, described replacement end pipe (2), water chestnut curved (3) and the material of replacing intervalve (4) they are seamless steel pipes.
3. as claimed in claim 1ly for repairing the connection aqueduct of impaired cast iron fire protection pipeline, it is characterized in that, the length of described replacement end pipe (2) can determine according to piping failure degree to be repaired.
4. as claimed in claim 1ly for repairing the connection aqueduct of impaired cast iron fire protection pipeline, it is characterized in that, the diameter of described replacement end pipe (2) is than more than the large 20mm of the diameter of impaired cast iron fire protection pipeline.
5. as claimed in claim 1ly for repairing the connection aqueduct of impaired cast iron fire protection pipeline, it is characterized in that, described water chestnut curved (3) is that 30 degree water chestnuves are curved.
6. as claimed in claim 1ly for repairing the connection aqueduct of impaired cast iron fire protection pipeline, it is characterized in that, the diameter of described plug (5) can be determined according to the residual water flow in impaired cast iron fire protection pipeline.
7. for repairing a restorative procedure for the connection aqueduct of impaired cast iron fire protection pipeline, it is characterized in that comprising the following steps:
A, the impaired part of pipeline is cut off;
B, outside the port at pipe cutting place, each cover unification is replaced end pipe (2) and is formed a socket joint and connect;
The assembly parts of intervalve (4) is replaced in c, making
At replacement intervalve (4) two ends, weld respectively water chestnut curved (3), and plug (5) is installed under replacement intervalve (4) and is made the assembly parts of replacing intervalve (4);
The assembly parts of intervalve (4) is replaced in d, installation welding
The water chestnut curved (3) of replacing the assembly parts two ends of intervalve (4) is installed to be welded to and replace end pipe (2);
E, socket joint connect the conventional measure that adopts asbestos cement interface
F, adopt Clay coating mouth of pipe maintenance or often water moistening, at least maintenance pressure testing after 24 hours;
Before g, backfill, carry out pitch preservative treatment
Before backfill, carry out the pitch preservative treatment that connects aqueduct.
8. as claimed in claim 7ly for repairing the restorative procedure of the connection aqueduct of impaired cast iron fire protection pipeline, it is characterized in that, in described step b, replace end pipe (2) and will reach in being connected with burst pipe (1) socket joint in pipe in pipe, make ligament even.
9. as claimed in claim 8ly for repairing the restorative procedure of the connection aqueduct of impaired cast iron fire protection pipeline, it is characterized in that, replace ligament >=10mm that end pipe (2) is connected with burst pipe (1) socket joint.
10. as claimed in claim 7ly for repairing the restorative procedure of the connection aqueduct of impaired cast iron fire protection pipeline, it is characterized in that, in described step f, plug before pressure testing (5) is held open state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210297260.0A CN103629474B (en) | 2012-08-21 | 2012-08-21 | For repairing the restorative procedure connecting aqueduct of impaired cast iron fire protection pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210297260.0A CN103629474B (en) | 2012-08-21 | 2012-08-21 | For repairing the restorative procedure connecting aqueduct of impaired cast iron fire protection pipeline |
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| CN103629474A true CN103629474A (en) | 2014-03-12 |
| CN103629474B CN103629474B (en) | 2016-08-10 |
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| CN201210297260.0A Active CN103629474B (en) | 2012-08-21 | 2012-08-21 | For repairing the restorative procedure connecting aqueduct of impaired cast iron fire protection pipeline |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109114350A (en) * | 2018-08-27 | 2019-01-01 | 中国石油天然气股份有限公司 | Construction method for repairing glass fiber reinforced plastic pipe |
| CN109237201A (en) * | 2018-12-03 | 2019-01-18 | 天津城建大学 | The quick obturator of pipeline |
| CN111322485A (en) * | 2020-02-07 | 2020-06-23 | 王宁宁 | Pipe repair device |
| WO2020239080A1 (en) * | 2019-05-10 | 2020-12-03 | 江苏恒达工程检测有限公司 | Method for minimally invasive repair and rapid replacement of underground drainage pipes |
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| GB586226A (en) * | 1944-12-18 | 1947-03-11 | Thomas Nicholas Young | Apparatus for temporarily stopping pipes |
| US4357960A (en) * | 1977-03-24 | 1982-11-09 | Arthur S. Bittinger | Plumbing method and composition for use in same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114350A (en) * | 2018-08-27 | 2019-01-01 | 中国石油天然气股份有限公司 | Construction method for repairing glass fiber reinforced plastic pipe |
| CN109114350B (en) * | 2018-08-27 | 2020-10-09 | 中国石油天然气股份有限公司 | Construction method for repairing glass fiber reinforced plastic pipe |
| CN109237201A (en) * | 2018-12-03 | 2019-01-18 | 天津城建大学 | The quick obturator of pipeline |
| WO2020239080A1 (en) * | 2019-05-10 | 2020-12-03 | 江苏恒达工程检测有限公司 | Method for minimally invasive repair and rapid replacement of underground drainage pipes |
| CN111322485A (en) * | 2020-02-07 | 2020-06-23 | 王宁宁 | Pipe repair device |
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| Publication number | Publication date |
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| CN103629474B (en) | 2016-08-10 |
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