CN104373744A - Ball-locking type emergency repair leakage stoppage plate and method for repairing pipeline in emergency through ball-locking type emergency repair leakage stoppage plate - Google Patents

Ball-locking type emergency repair leakage stoppage plate and method for repairing pipeline in emergency through ball-locking type emergency repair leakage stoppage plate Download PDF

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Publication number
CN104373744A
CN104373744A CN201410601170.5A CN201410601170A CN104373744A CN 104373744 A CN104373744 A CN 104373744A CN 201410601170 A CN201410601170 A CN 201410601170A CN 104373744 A CN104373744 A CN 104373744A
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CN
China
Prior art keywords
plugging plate
pipeline
ball
valve
jig
Prior art date
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Granted
Application number
CN201410601170.5A
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Chinese (zh)
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CN104373744B (en
Inventor
颜丹平
霍志刚
张海梁
赵欣
陈文利
韩赞东
钱迪
高岷
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Beijing Gas Group Co Ltd
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Beijing Gas Group Co Ltd
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Publication date
Application filed by Beijing Gas Group Co Ltd filed Critical Beijing Gas Group Co Ltd
Priority to CN201410601170.5A priority Critical patent/CN104373744B/en
Publication of CN104373744A publication Critical patent/CN104373744A/en
Application granted granted Critical
Publication of CN104373744B publication Critical patent/CN104373744B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/168Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
    • F16L55/17Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose

Abstract

The invention relates to a leakage stoppage plate, in particular to a ball-locking type emergency repair leakage stoppage plate and a method for repairing a pipeline in emergency through the ball-locking type emergency repair leakage stoppage plate. The ball-locking type emergency repair leakage stoppage plate is simple in structure, low in cost, easy and convenient to operate, long in service life, safe and reliable. The ball-locking type emergency repair leakage stoppage plate comprises a plate body (31), a valve (32) and a seal ball (321). An exhaust hole is formed in the middle of the plate body (31) and provided with the valve (32), a cylindrical hole is formed in the lower portion inside the valve (32), a big-end-down frustum-cone hole is formed in the upper portion inside the valve (32), the seal ball (321) is arranged inside the valve (32), the diameter of the seal ball (321) is larger than that of the upper end of the frustum-cone hole but smaller than that of the lower end of the frustum-cone hole, and the seal ball (321) is connected with the bottom of the valve (32) through a spring.

Description

A kind of ball lock type is rushed to repair plugging plate and is utilized the method for its repairing pipeline
Technical field
The present invention relates to a kind of plugging plate, particularly relate to a kind of plugging plate for pipe pressurized leak stopping and utilize it to rush to repair the method for pipeline.
Background technique
Current domestic and international existing Live leaking-stopping technology can be divided into according to operation form do not get angry leak stopping and leak stopping two class of getting angry.
Not get angry the difference of leak stopping according to know-why and method, agent injecting type Live leaking-stopping technology, adhering and sealing technology with pressure, top-closed structure sealing technique with pressure etc. can be divided into again.Leakage stopping technology of not getting angry mainly refers to welding technique, and it does not use naked light in operation process, has the advantages such as safe and reliable, easy and simple to handle.But consider that gas transmission and distribution pipe material is metal, leakage stopping technology of not getting angry temporaryly can only play mending-leakage effect, namely " cures the symptoms, not the disease ", does not reach permanently effective effect.Thus, when carrying out pipeline medium emptying and displacement, welding process is best metallic conduit leakage-stopping method.The application of current welding type pressure sealing is less.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of structure is simple, cost is low, easy and simple to handle, long service life, safe and reliable a kind of ball lock type repairing plugging plate and utilize the method for its repairing pipeline.
A kind of ball lock type repairing of the present invention plugging plate, comprise plate body, valve and ball sealer, offer exhaust port in the middle part of described plate body, described exhaust port is provided with valve, and in described valve, bottom is cylindrical hole, top is round platform hole, described round platform hole is up-small and down-big round platform hole, is provided with ball sealer in valve, and described ball sealer diameter is greater than upper end, round platform hole, be less than lower end, round platform hole, ball sealer is connected with bottom valve by spring.
A kind of ball lock type repairing of the present invention plugging plate, wherein said plugging plate also comprises conversion adapter, bolt and bonnet, described valve top part is threaded with conversion adapter or bonnet, described conversion adapter inside is communicated with round platform hole, conversion adapter top is provided with exhaust nut, be connected with bolt thread in the middle part of described exhaust nut, exhaust nut is provided with nut exhaust port, and nut exhaust port is communicated with round platform hole.
A kind of ball lock type repairing of the present invention plugging plate, plate body and the tube contacts place inner ring of wherein said plugging plate are provided with fluorine rubber ring, and outer ring is provided with silicon rubber loop, and the diameter of the surface of contact of plugging plate and pipeline is greater than outer diameter tube.
A kind of ball lock type repairing of the present invention plugging plate, wherein said plugging plate is provided with two chain grooves.
The method of a kind of ball lock type repairing of the present invention plugging plate repairing pipeline, comprises the steps:
A, the valve of plugging plate to be threaded with conversion adapter, and the bolt in the middle part of conversion adapter is twisted downwards, make bolt push up ball sealer downwards, ball is locked and opens;
B, the middle part of plugging plate is positioned over pipe leakage place;
C, the position of 180 ° of rotating in a circumferential direction at pipe leakage place are by two cover jig and pipeline clampings;
D, utilize jig to fix the two ends of chain, chain fixes plugging plate by the chain groove of plugging plate;
E, jig are by chain banding plugging plate;
F, along the outer that plugging plate is not blocked by chain and pipeline welding;
G, unload jig, and the plugging plate outer that chain is blocked and pipeline welding;
H, conversion adapter of back-outing, bonnet of screwing on, and by bonnet and standard.
The method of a kind of ball lock type repairing of the present invention plugging plate repairing pipeline, comprises the steps:
A, the valve of plugging plate to be threaded with conversion adapter, and the bolt in the middle part of conversion adapter is twisted downwards, make bolt push up ball sealer downwards, ball is locked and opens;
B, the middle part of plugging plate is positioned over pipe leakage place;
C, same lateral position at pipe leakage place are by two cover jig and plugging plate clampings;
D, utilize jig to fix the two ends of chain, jig fixes plugging plate by the chain groove of plugging plate;
E, jig are by chain banding plugging plate;
F, along the outer that plugging plate is not blocked by jig and pipeline welding;
G, unload jig, and the plugging plate outer that jig is blocked and pipeline welding;
H, conversion adapter of back-outing, bonnet of screwing on, and by bonnet and standard.
A kind of ball lock type of the present invention repairing plugging plate difference from prior art is that a kind of ball lock type repairing of the present invention plugging plate is by ball lock construction, directly can lose heart to pipeline, facilitate blocking construction, save operating cost.
Bolt in a kind of ball lock type repairing of the present invention plugging plate on conversion adapter can by under ball sealer top, thus open ball lock, facilitate workman's independent construction, bonnet can prevent other people or thing from encountering ball lock, cause ball to be locked to lose efficacy, conversion adapter can be connected with tracheae, leakage combustion gas is directed at its elsewhere and reclaims or other process, ensure Site Welding safety simultaneously.Rush to repair last bonnet and standard, eliminate secondary and reveal hidden danger.
In a kind of ball lock type of the present invention repairing plugging plate, fluorine rubber has the characteristic of good sealing and oil resistant corrosion, loses efficacy after avoiding seal ring to be corroded.Silicone rubber has good heat resistance, avoids melting when plugging plate outer rim is welded, and uses two seal rings can improve sealing effect and Security when pressure high field contract, and simultaneously seal ring is compared pad and had the features such as easy to install.
Below in conjunction with accompanying drawing to a kind of ball lock type repairing plugging plate of the present invention and utilize method of its repairing pipeline to be described further.
Accompanying drawing explanation
Fig. 1 is a kind of self-protection tape-pressure leakage clogging device plan view in embodiment 1;
Fig. 2 is a kind of self-protection tape-pressure leakage clogging device plan view in example 2;
Fig. 3 is the plan view of plugging plate in Fig. 1;
Fig. 4 is the sectional view along A-A line in Fig. 3;
Fig. 5 is the sectional view that in Fig. 4, ball sealer pins;
Fig. 6 is the axonometric drawing of plugging plate in Fig. 3;
Fig. 7 is the plan view of plugging plate in Fig. 3.
Embodiment
Embodiment 1
As shown in Fig. 1 ~ 7, see Fig. 4, a kind of ball lock type repairing of the present invention plugging plate comprises plate body 31, valve 32 and ball sealer 321.Exhaust port is offered in the middle part of plate body 31.Exhaust port is provided with valve 32.In valve 32, bottom is cylindrical hole, and top is round platform hole.Round platform hole is up-small and down-big round platform hole, is provided with ball sealer 321 in valve 32.Ball sealer 321 diameter is greater than upper end, round platform hole, is less than lower end, round platform hole, and ball sealer 321 is connected with bottom valve 32 by spring.
See Fig. 4, Fig. 5, plugging plate 3 also comprises conversion adapter 33, bolt 34 and bonnet 35.Valve 32 top is threaded with conversion adapter 33.Conversion adapter 33 inside is communicated with round platform hole, and conversion adapter 33 top is provided with exhaust nut.Be threaded with bolt 34 in the middle part of exhaust nut, exhaust nut is provided with nut exhaust port 331, and nut exhaust port 331 is communicated with round platform hole.Valve 32 is communicated with exhaust duct by conversion adapter 33.Ball lock type plugging plate 3 can the pressure of venting pipeline 1 leakage place, is convenient to plugging plate 3 and welds with pipeline 1.
As shown in Figure 5, valve 32 top can also be threaded with bonnet 35.Bonnet 35 is for sealed valve 32.Cap pad 351 is provided with between bonnet 35 and valve 32 upper end.
Plate body 31 and the pipeline 1 contacting point inner ring of plugging plate 3 are provided with fluorine rubber ring 311, and outer ring is provided with silicon rubber loop 312.Plugging plate 3 is greater than pipeline 1 external diameter with the diameter of the surface of contact of pipeline 1.
Plugging plate 3 is provided with two chain grooves.
A method for ball lock type repairing plugging plate repairing pipeline, comprises the steps:
A, the valve 32 of plugging plate 3 to be threaded with conversion adapter 33, and the bolt 34 in the middle part of conversion adapter 33 is twisted downwards, make bolt 34 top ball sealer 321 downwards, ball is locked and opens;
B, the middle part of plugging plate 3 is positioned over pipeline 1 leak;
C, rotate in a circumferential direction the position of 180 ° by two cover jigs 2 and pipeline 1 clampings in pipeline 1 leak;
D, utilize jig 2 to fix the two ends of chain 4, chain 4 fixes plugging plate by the chain groove of plugging plate 3;
E, jig 2 are by chain 4 banding plugging plate 3;
F, not welded with pipeline 1 by the outer that chain 4 blocks along plugging plate 3;
G, unload jig 2, and plugging plate 3 outer blocked by chain 4 is welded with pipeline 1;
H, conversion adapter 33 of back-outing, bonnet 35 of screwing on, and bonnet 35 is welded with valve 32.
Embodiment 2
A method for ball lock type repairing plugging plate repairing pipeline, comprises the steps:
A, the valve 32 of plugging plate 3 to be threaded with conversion adapter 33, and the bolt 34 in the middle part of conversion adapter 33 is twisted downwards, make bolt 34 top ball sealer 321 downwards, ball is locked and opens;
B, the middle part of plugging plate 3 is positioned over pipeline 1 leak;
C, at the same lateral position of pipeline 1 leak by two cover jigs 2 and plugging plate 3 clampings;
D, utilize jig 2 to fix the two ends of chain 4, jig 2 fixes plugging plate by the chain groove of plugging plate 3;
E, jig 2 are by chain 4 banding plugging plate 3;
F, not welded with pipeline 1 by the outer that jig 2 blocks along plugging plate 3;
G, unload jig 2, and plugging plate 3 outer blocked by jig 2 is welded with pipeline 1;
H, conversion adapter 33 of back-outing, bonnet 35 of screwing on, and bonnet 35 is welded with valve 32.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technological scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.

Claims (6)

1. a ball lock type repairing plugging plate, it is characterized in that: comprise plate body (31), valve (32) and ball sealer (321), described plate body (31) middle part offers exhaust port, described exhaust port is provided with valve (32), described valve (32) interior bottom is cylindrical hole, top is round platform hole, described round platform hole is up-small and down-big round platform hole, ball sealer (321) is provided with in valve (32), described ball sealer (321) diameter is greater than upper end, round platform hole, be less than lower end, round platform hole, ball sealer (321) is connected with valve (32) bottom by spring.
2. a kind of ball lock type repairing plugging plate according to claim 1, it is characterized in that: described plugging plate (3) also comprises conversion adapter (33), bolt (34) and bonnet (35), described valve (32) top is threaded with conversion adapter (33) or bonnet (35), described conversion adapter (33) inside is communicated with round platform hole, conversion adapter (33) top is provided with exhaust nut, be threaded with bolt (34) in the middle part of described exhaust nut, exhaust nut is provided with nut exhaust port (331), nut exhaust port (331) is communicated with round platform hole.
3. a kind of ball lock type repairing plugging plate according to claim 2, it is characterized in that: plate body (31) and pipeline (1) the contacting point inner ring of described plugging plate (3) are provided with fluorine rubber ring (311), outer ring is provided with silicon rubber loop (312), and plugging plate (3) is greater than pipeline (1) external diameter with the diameter of the surface of contact of pipeline (1).
4. a kind of ball lock type repairing plugging plate according to claim 3, is characterized in that: described plugging plate (3) is provided with two chain grooves.
5. the method for a kind of ball lock type repairing plugging plate repairing pipeline according to claim 4, is characterized in that comprising the steps:
A, the valve (32) of plugging plate (3) to be threaded with conversion adapter (33), and the bolt (34) at conversion adapter (33) middle part is twisted downwards, make bolt (34) push up ball sealer (321) downwards, ball is locked and opens;
B, the middle part of plugging plate (3) is positioned over pipeline (1) leak;
C, pipeline (1) leak rotate in a circumferential direction 180 ° position by two cover jig (2) with pipeline (1) clampings;
D, utilize the two ends of the fixing chain (4) of jig (2), chain (4) fixes plugging plate by the chain groove of plugging plate (3);
E, jig (2) are by chain (4) banding plugging plate (3);
F, not welded with pipeline (1) by the outer that chain (4) blocks along plugging plate (3);
G, unload jig (2), and plugging plate (3) outer blocked by chain (4) is welded with pipeline (1);
H, conversion adapter of back-outing (33), bonnet of screwing on (35), and bonnet (35) is welded with valve (32).
6. the method for a kind of ball lock type repairing plugging plate repairing pipeline according to claim 4, is characterized in that comprising the steps:
A, the valve (32) of plugging plate (3) to be threaded with conversion adapter (33), and the bolt (34) at conversion adapter (33) middle part is twisted downwards, make bolt (34) push up ball sealer (321) downwards, ball is locked and opens;
B, the middle part of plugging plate (3) is positioned over pipeline (1) leak;
C, pipeline (1) leak same lateral position by two cover jig (2) with plugging plate (3) clampings;
D, utilize the two ends of the fixing chain (4) of jig (2), jig (2) fixes plugging plate by the chain groove of plugging plate (3);
E, jig (2) are by chain (4) banding plugging plate (3);
F, not welded with pipeline (1) by the outer that jig (2) blocks along plugging plate (3);
G, unload jig (2), and plugging plate (3) outer blocked by jig (2) is welded with pipeline (1);
H, conversion adapter of back-outing (33), bonnet of screwing on (35), and bonnet (35) is welded with valve (32).
CN201410601170.5A 2014-10-30 2014-10-30 Ball-locking type emergency repair leakage stoppage plate and method for repairing pipeline in emergency through ball-locking type emergency repair leakage stoppage plate Active CN104373744B (en)

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CN201410601170.5A CN104373744B (en) 2014-10-30 2014-10-30 Ball-locking type emergency repair leakage stoppage plate and method for repairing pipeline in emergency through ball-locking type emergency repair leakage stoppage plate

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CN201410601170.5A CN104373744B (en) 2014-10-30 2014-10-30 Ball-locking type emergency repair leakage stoppage plate and method for repairing pipeline in emergency through ball-locking type emergency repair leakage stoppage plate

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108953992A (en) * 2018-09-29 2018-12-07 国网福建省电力有限公司 A kind of leaking stoppage valve and its working method
CN110778847A (en) * 2019-10-08 2020-02-11 德州市热力发展有限公司 Heat supply pipe network leakage blocking device and method

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370364A (en) * 1981-01-17 1983-01-25 Diga - Die Gasheizung Gmbh Method for lining pipe mains having branching domestic connection pipes
FR2605378A1 (en) * 1986-10-17 1988-04-22 Clement Raymond Device for intervention on connections of pipelines in service
CN2035798U (en) * 1988-08-26 1989-04-12 杨文友 Gasoline flow controller for automobile
CN2068095U (en) * 1990-02-27 1990-12-26 曲凤来 Oil filler, drain valve for high-voltage electric equipment
CN2505680Y (en) * 2001-09-13 2002-08-14 张国林 Pressurized sealing leak-stopping hose
CN2564836Y (en) * 2001-06-14 2003-08-06 濮阳市万锐科技开发有限公司 Composite leak stopper for pipeline
CN2618015Y (en) * 2002-12-30 2004-05-26 毛廷辉 Spring uniflow valves
CN2881080Y (en) * 2006-01-11 2007-03-21 赵培文 Square drill rod back pressure valve
CN202065609U (en) * 2011-05-11 2011-12-07 河北二十冶工程技术有限公司 Leakage-stopping device for pressurized pipeline
CN202118439U (en) * 2011-05-30 2012-01-18 中国一冶集团有限公司 Online leaking stoppage device for pressure pipeline
CN102384337A (en) * 2011-06-20 2012-03-21 永升建设集团有限公司 Rapid plugging method for fiberglass pipeline with water and pressure
CN103062571A (en) * 2012-12-20 2013-04-24 天津卓达管道机械制造有限公司 Leaking stoppage device of pipe hole leakage points
CN203907113U (en) * 2014-06-20 2014-10-29 林文洁 Leakage stoppage device for pipe leakage hole
CN203907114U (en) * 2014-06-23 2014-10-29 陈彤 Pipeline pressure-bearing leak-repairing device
CN204312933U (en) * 2014-10-30 2015-05-06 北京市燃气集团有限责任公司 A kind of ball lock type repairing plugging plate

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370364A (en) * 1981-01-17 1983-01-25 Diga - Die Gasheizung Gmbh Method for lining pipe mains having branching domestic connection pipes
FR2605378A1 (en) * 1986-10-17 1988-04-22 Clement Raymond Device for intervention on connections of pipelines in service
CN2035798U (en) * 1988-08-26 1989-04-12 杨文友 Gasoline flow controller for automobile
CN2068095U (en) * 1990-02-27 1990-12-26 曲凤来 Oil filler, drain valve for high-voltage electric equipment
CN2564836Y (en) * 2001-06-14 2003-08-06 濮阳市万锐科技开发有限公司 Composite leak stopper for pipeline
CN2505680Y (en) * 2001-09-13 2002-08-14 张国林 Pressurized sealing leak-stopping hose
CN2618015Y (en) * 2002-12-30 2004-05-26 毛廷辉 Spring uniflow valves
CN2881080Y (en) * 2006-01-11 2007-03-21 赵培文 Square drill rod back pressure valve
CN202065609U (en) * 2011-05-11 2011-12-07 河北二十冶工程技术有限公司 Leakage-stopping device for pressurized pipeline
CN202118439U (en) * 2011-05-30 2012-01-18 中国一冶集团有限公司 Online leaking stoppage device for pressure pipeline
CN102384337A (en) * 2011-06-20 2012-03-21 永升建设集团有限公司 Rapid plugging method for fiberglass pipeline with water and pressure
CN103062571A (en) * 2012-12-20 2013-04-24 天津卓达管道机械制造有限公司 Leaking stoppage device of pipe hole leakage points
CN203907113U (en) * 2014-06-20 2014-10-29 林文洁 Leakage stoppage device for pipe leakage hole
CN203907114U (en) * 2014-06-23 2014-10-29 陈彤 Pipeline pressure-bearing leak-repairing device
CN204312933U (en) * 2014-10-30 2015-05-06 北京市燃气集团有限责任公司 A kind of ball lock type repairing plugging plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108953992A (en) * 2018-09-29 2018-12-07 国网福建省电力有限公司 A kind of leaking stoppage valve and its working method
CN110778847A (en) * 2019-10-08 2020-02-11 德州市热力发展有限公司 Heat supply pipe network leakage blocking device and method
CN110778847B (en) * 2019-10-08 2021-03-02 德州市热力发展有限公司 Heat supply pipe network leakage blocking device and method

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