CN111365560A - Method for treating steam leakage of steam pipeline flange without stopping steam - Google Patents
Method for treating steam leakage of steam pipeline flange without stopping steam Download PDFInfo
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- CN111365560A CN111365560A CN202010144375.0A CN202010144375A CN111365560A CN 111365560 A CN111365560 A CN 111365560A CN 202010144375 A CN202010144375 A CN 202010144375A CN 111365560 A CN111365560 A CN 111365560A
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- steam
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- sealant
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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
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/175—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by using materials which fill a space around the pipe before hardening
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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
- F16L55/18—Appliances for use in repairing pipes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
A method for processing steam leakage of a steam pipeline flange without stopping steam belongs to the technical field of steam pipeline equipment maintenance methods and is used for processing the steam leakage at the joint of the steam pipeline flange without stopping steam. The technical scheme is as follows: the gap between the two flanges is plugged by the thin steel bar, a plurality of sealant injection holes are reserved, welding nuts are arranged at the sealant injection holes, the front ends of the hollow bolts are screwed in the welding nuts of the sealant injection holes, the rear ends of the hollow bolts are connected with the long nuts, a high-pressure oil gun injects sealant into the sealant injection holes through the long nuts and the hollow bolts, and the sealant seals the leakage of the flanges. The method can be used for plugging the steam leakage of the flange of the steam pipeline under the condition of not stopping gas, is simple to operate, quick in plugging, safe and convenient, can ensure continuous production, reduces maintenance time, improves maintenance work efficiency, saves maintenance cost, and has remarkable economic benefit.
Description
Technical Field
The invention relates to a method for treating air leakage at a flange joint of a steam pipeline without stopping steam, and belongs to the technical field of steam pipeline equipment maintenance methods.
Background
In the production process of many industrial and mining enterprises, steam pipelines are used for conveying steam, and the steam is used as a power source of various devices, or is used for medium heating, or is used for cleaning pipelines and the like. The general steam delivery pipeline is long, and a large number of flanges are needed to be used for connection in the middle. During long-term operation of the steam pipeline, the flange gasket is often damaged, and the flange leaks air. In most cases, treating flange leaks can close valves in the pipeline, stop steam delivery, replace the flange gasket, and then resume steam delivery. However, in some special cases, if the steam is stopped, the production is stopped, or the production is greatly influenced, so that the steam delivery cannot be easily stopped, and in this case, the treatment is difficult, especially in the case of a steam delivery pipe with a large diameter and a high air pressure, the treatment is very difficult, and accidents such as scalding are easily caused. Therefore, how to deal with the problem of leakage of the steam pipeline flange under the condition of not stopping the gas becomes a difficult problem for maintenance personnel of enterprises, and needs to be solved urgently.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for treating steam leakage of a flange plate of a steam pipeline without stopping steam, and the method can stop the steam leakage of the flange under the condition of not stopping steam, thereby achieving the purposes of keeping continuous production, preventing safety accidents and saving maintenance cost.
The technical scheme for solving the technical problems is as follows:
a method for treating steam leakage of a steam pipeline flange without stopping steam comprises the following steps:
firstly, selecting 2-4 welding nuts with the outer diameter larger than the gap between the two flange plates, and respectively welding the welding nuts at the outer sides of the gap between the two flange plates, wherein two sides of each welding nut are respectively and firmly welded with the two flange plates;
secondly, selecting a thin steel bar with the diameter larger than or equal to the gap between the two flange plates, and cutting the length according to the distance between the welding nuts;
thirdly, welding a plurality of thin steel bars on the gap between two flanges between two adjacent welding nuts by electric welding, wherein two sides of the thin steel bars are respectively and tightly welded with the two flanges, and two ends of the thin steel bars are tightly welded with the two welding nuts, so that steam leakage can only emerge from screw holes of the welding nuts welded between the two flanges;
fourthly, preparing a hollow bolt and a long nut, wherein the external thread of the hollow bolt is matched with the internal thread of a welding nut welded on the flange plate, the internal thread of the long nut is matched with the external thread of the hollow bolt, one end of the hollow bolt is screwed in the welding nut welded on the flange plate, the lower end of the long nut is screwed on the other end of the hollow bolt, and steam leakage escapes through the hollow bolt and the long nut;
fifthly, connecting a high-pressure oil gun filled with high-temperature sealant with the upper end of the long nut, and driving the high-pressure sealant into the gap between the two flange plates through the long nut, the hollow bolt and the welding nut until the gap between the two flange plates is filled;
sixthly, screwing the plugging locking nut arranged on the long nut in place, sealing the sealant at the gap between the flange plates, and then unloading the high-pressure oil gun;
and seventhly, repeating the process until the gaps among the flange plates between the welding nuts on the circumference of the steam pipeline are completely filled with the sealant, and sealing the steam leakage in the steam pipeline by the sealant without escaping.
According to the method for treating the steam leakage of the steam pipeline flange without stopping the steam, the oil filling nozzle matched with the long nut is replaced when the high-pressure oil gun is filled with the oil, and the high-pressure oil gun is tightly connected with the oil filling end of the long nut.
The invention has the beneficial effects that:
the gap between the two flanges is plugged by the thin steel bar, a plurality of sealant injection holes are reserved, welding nuts are arranged at the sealant injection holes, the front ends of the hollow bolts are screwed in the welding nuts of the sealant injection holes, the rear ends of the hollow bolts are connected with the long nuts, a high-pressure oil gun injects sealant into the sealant injection holes through the long nuts and the hollow bolts, and the sealant seals the leakage of the flanges.
The method can be used for plugging the steam leakage of the steam pipeline flange under the condition of no gas interruption, is simple to operate, quick in plugging, safe and convenient, can ensure continuous production, reduces maintenance time, improves maintenance work efficiency, saves maintenance cost, has obvious economic benefit, provides a new way for enterprises to maintain the steam leakage of the steam pipeline flange without gas interruption, and is worthy of popularization and application.
Drawings
FIG. 1 is a schematic diagram of the method of use of the present invention.
The figures are labeled as follows: the flange plate comprises a flange plate 1, a flange fastening bolt 2, a thin steel bar welding seam 3, a steam pipeline 4, a welding nut 5, a long nut 6, a hollow bolt 7 and a plug 8.
Detailed Description
The method for treating steam leakage of the steam pipeline flange without stopping steam needs to use the parts of a welding nut 5, a long nut 6, a hollow bolt 7, a plug 8, a thin steel bar and a high-pressure oil gun.
The figure shows that the method for treating the steam leakage of the flange of the steam pipeline without stopping the steam adopts the following steps:
firstly, selecting a welding nut 5 with the outer diameter larger than the gap between the two flange plates 1, clamping the welding nut 5 by using long-leg pliers, respectively welding the welding nut 5 at the outer side of the gap between the two flange plates 1, and firmly welding the two sides of the welding nut 5 with the two flange plates 1 respectively. According to the size of the flange plate 1 and the steam leakage condition, 2-4 welding nuts 5 are adopted, and generally, the nuts with the diameter of about 10mm are selected.
Secondly, selecting a thin steel bar with the diameter larger than or equal to the gap between the two flange plates 1, and cutting the length according to the distance between the welding nuts 5;
and thirdly, welding a plurality of thin steel bars on the gap between two adjacent flanges 1 between two welding nuts 5 respectively by electric welding, wherein the two sides of the thin steel bars are welded with the two flanges 1 tightly to form a steel bar welding seam 3, and meanwhile, the two ends of the thin steel bars are welded with the two welding nuts 5 tightly, so that steam leakage can only be emitted from the screw holes of the welding nuts 5 welded between the two flanges 1.
And fourthly, preparing a hollow bolt 7 and a long nut 6, wherein the external thread of the hollow bolt 7 is matched with the internal thread of a welding nut 5 welded on the flange plate 1, the internal thread of the long nut 6 is matched with the external thread of the hollow bolt 7, one end of the hollow bolt 7 is screwed into the welding nut 5 welded on the flange plate 1, the lower end of the long nut 6 is screwed on the other end of the hollow bolt, and steam leakage escapes through the hollow bolt 7 and the long nut 6.
And fifthly, connecting a high-pressure oil gun filled with high-temperature sealant with the upper end of the long nut 6, and driving the high-pressure sealant into the gap between the two flange plates 1 through the long nut 6, the hollow bolt 7 and the welding nut 5 until the gap between the two flange plates 1 is filled.
And sixthly, screwing the locking nut arranged on the long nut 6 in place, sealing the sealant at the gap between the flange plates 1, and then disassembling the high-pressure oil gun.
And seventhly, repeating the process until the gaps among the flange plates between the welding nuts 5 on the circumference of the steam pipeline are completely filled with the sealant, and sealing the steam leakage in the steam pipeline by the sealant without escaping.
In the operation process, the oil filling nozzle matched with the long nut 6 is replaced when the high-pressure oil gun is filled with oil, and the high-pressure oil gun is tightly connected with the oil filling end of the long nut 6.
One embodiment of the invention is as follows:
a diameter is 100 mm's steam pipe flange leak steam, does not stop the steam and handles, and the external diameter of the ring flange 1 of steam pipe junction is 225mm, and the gap width between two ring flanges 1 is 10mm, and the diameter of selecting the thin reinforcing bar is 10mm, and weld nut 5's screw diameter 24 mm, hollow bolt 7's external diameter 24 mm, internal diameter 12 mm, long nut 6's internal diameter 24 mm, external diameter 30 mm.
Claims (2)
1. A method for treating steam leakage of a steam pipeline flange without stopping steam is characterized by comprising the following steps: the method comprises the following steps:
firstly, selecting 2-4 welding nuts (5) with the external diameter larger than the gap between the two flange plates (1), respectively welding the welding nuts (5) at the outer side of the gap between the two flange plates (1), and firmly welding the two sides of the welding nuts (5) with the two flange plates (1) respectively;
secondly, selecting a thin steel bar with the diameter larger than or equal to the gap between the two flange plates (1), and intercepting the length according to the distance between the welding nuts (5);
thirdly, welding a plurality of thin steel bars on the gap between two flanges (1) between two adjacent welding nuts (5) respectively by electric welding, wherein two sides of the thin steel bars are welded with the two flanges (1) tightly, and two ends of the thin steel bars are welded with the two welding nuts (5) tightly, so that steam leakage can only emerge from screw holes of a plurality of welding nuts (5) welded between the two flanges (1);
fourthly, preparing a hollow bolt (7) and a long nut (6), wherein the external thread of the hollow bolt (7) is matched with the internal thread of a welding nut (5) welded on the flange plate (1), the internal thread of the long nut (6) is matched with the external thread of the hollow bolt (7), one end of the hollow bolt (7) is screwed in the welding nut (5) welded on the flange plate (1), the lower end of the long nut (6) is screwed on the other end of the hollow bolt (7), and steam leakage escapes from the hollow bolt (7) and the long nut (6);
fifthly, connecting a high-pressure oil gun filled with high-temperature sealant with the upper end of a long nut (6), and driving the high-pressure sealant into the gap between the two flange plates (1) through the long nut (6), a hollow bolt (7) and a welding nut (5) until the gap between the two flange plates (1) is filled;
sixthly, screwing the plugging lock nut (8) arranged on the long nut (6) in place, sealing the sealant at the gap between the flange plates (1), and then unloading the high-pressure oil gun;
and seventhly, repeating the process until the gaps between the flange plates (1) among the welding nuts (5) on the circumference of the steam pipeline are completely filled with the sealant, and sealing the steam leakage in the steam pipeline by the sealant without escaping.
2. The method for treating the steam leakage of the flange of the steam pipeline without stopping the steam as claimed in claim 1, wherein the method comprises the following steps: the high-pressure oil gun is replaced with the oil filling nozzle matched with the long nut (6) when being filled with oil, and is tightly connected with the oil filling end of the long nut (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010144375.0A CN111365560A (en) | 2020-03-04 | 2020-03-04 | Method for treating steam leakage of steam pipeline flange without stopping steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010144375.0A CN111365560A (en) | 2020-03-04 | 2020-03-04 | Method for treating steam leakage of steam pipeline flange without stopping steam |
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| Publication Number | Publication Date |
|---|---|
| CN111365560A true CN111365560A (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010144375.0A Pending CN111365560A (en) | 2020-03-04 | 2020-03-04 | Method for treating steam leakage of steam pipeline flange without stopping steam |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0082792A1 (en) * | 1981-12-23 | 1983-06-29 | Jean-Noel Lamotte | Clamping device for sealing leaks in a flanged pipe joint |
| DE19717209A1 (en) * | 1997-04-24 | 1998-10-29 | Manibs Spezialarmaturen | Pipe leak repair cuff surrounding pipe |
| CN201096252Y (en) * | 2007-07-10 | 2008-08-06 | 克漏科技有限公司 | Leak-stopping device |
| CN201539665U (en) * | 2009-10-15 | 2010-08-04 | 克漏科技有限公司 | Leak-stopping apparatus for flange |
| CN202297646U (en) * | 2011-09-30 | 2012-07-04 | 天津钢铁集团有限公司 | Novel flange sealing clamp for hot blast valve |
| CN105927819A (en) * | 2016-07-08 | 2016-09-07 | 安徽晋煤中能化工股份有限公司 | Under-pressure flange bolt punching, glue injecting and leakage stopping method |
| CN108980510A (en) * | 2018-07-06 | 2018-12-11 | 陕钢集团汉中钢铁有限责任公司 | One kind being used for the online device for plugging of gaspipe network and blocking method |
-
2020
- 2020-03-04 CN CN202010144375.0A patent/CN111365560A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0082792A1 (en) * | 1981-12-23 | 1983-06-29 | Jean-Noel Lamotte | Clamping device for sealing leaks in a flanged pipe joint |
| DE19717209A1 (en) * | 1997-04-24 | 1998-10-29 | Manibs Spezialarmaturen | Pipe leak repair cuff surrounding pipe |
| CN201096252Y (en) * | 2007-07-10 | 2008-08-06 | 克漏科技有限公司 | Leak-stopping device |
| CN201539665U (en) * | 2009-10-15 | 2010-08-04 | 克漏科技有限公司 | Leak-stopping apparatus for flange |
| CN202297646U (en) * | 2011-09-30 | 2012-07-04 | 天津钢铁集团有限公司 | Novel flange sealing clamp for hot blast valve |
| CN105927819A (en) * | 2016-07-08 | 2016-09-07 | 安徽晋煤中能化工股份有限公司 | Under-pressure flange bolt punching, glue injecting and leakage stopping method |
| CN108980510A (en) * | 2018-07-06 | 2018-12-11 | 陕钢集团汉中钢铁有限责任公司 | One kind being used for the online device for plugging of gaspipe network and blocking method |
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Application publication date: 20200703 |