CN109737316B - Isolation shielding device and method for valve inner leakage - Google Patents
Isolation shielding device and method for valve inner leakage Download PDFInfo
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- CN109737316B CN109737316B CN201910201515.0A CN201910201515A CN109737316B CN 109737316 B CN109737316 B CN 109737316B CN 201910201515 A CN201910201515 A CN 201910201515A CN 109737316 B CN109737316 B CN 109737316B
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Abstract
The invention relates to an isolation shielding device and method for valve inner leakage. An isolation barrier for a leak in a valve, comprising: the pipeline between the adjacent valve 1 and the valve 2 is a pipeline 1, and the pipeline 1 is communicated with the gas tank 1 through the pipeline 2 and is communicated with the gas tank 2 through a pipeline 3; the gas tank 1 is an inert gas tank; pipeline 2 on be provided with side leakage valve group 1, side leakage valve group 1 include: the valve 5 is a leak detection valve; pipeline 3 on be provided with side leakage valve group 2, side leakage valve group 2 include: valve 6, valve 7 and valve 8, valve 8 be leak hunting valve. The isolation shielding device and the method for the internal leakage of the valve have the advantages of good shielding effect, high judgment accuracy, low investment cost, saving of investment for replacing the valve and good environment-friendly effect.
Description
Technical Field
The invention particularly relates to an isolation shielding device and method for valve internal leakage.
Background
The valve is used for cutting off in the process of pipeline transportation of dangerous chemicals, flammable and explosive gases or liquids, and the sealing requirement of the valve is high in the cutting-off process. Because the valve is subjected to various severe environments such as temperature, pressure, abrasion, corrosion and the like in operation, the valve is sealed without leakage by less than 100% under the common condition, and leakage can be caused, so that accidents such as leakage, combustion, explosion and the like can occur, and the subsequent operation can not be safely carried out. Meanwhile, the service life of the valve is shortened due to the internal leakage corrosion of the valve, the valve is damaged too fast, and the economic benefit of a company is influenced. The existing method is generally to overhaul the unit and then replace the new valve, but leakage has already occurred.
In view of the above, there is a need for an isolation and shielding device and method for valve internal leakage, which can effectively solve the problem and ensure the effective performance of the subsequent operation.
Disclosure of Invention
The invention aims to provide an isolation and shielding device for internal leakage of a valve, which has good isolation and shielding effects, avoids environmental pollution, reduces replacement investment, is simple to operate, and can solve the problem of external leakage so as to ensure safe operation.
In order to realize the purpose, the adopted technical scheme is as follows:
an isolation barrier for a leak in a valve, comprising:
the pipeline between the adjacent valve 1 and the valve 2 is a pipeline 1, and the pipeline 1 is communicated with the gas tank 1 through the pipeline 2 and is communicated with the gas tank 2 through a pipeline 3; and the joint of the pipeline 2 and the pipeline 1 is positioned between the joint of the pipeline 3 and the pipeline 1 and the valve 1;
the gas tank 1 is an inert gas tank;
pipeline 2 on be provided with side leakage valve group 1, side leakage valve group 1 include: the valve 5 is a leak detection valve;
pipeline 3 on be provided with side leakage valve group 2, side leakage valve group 2 include: valve 6, valve 7 and valve 8, valve 8 be leak hunting valve.
Further, the pressure of the gas in the gas tank 1 is greater than the pressure of the gas in the gas tank 2.
The invention also aims to provide an isolation and shielding method for the internal leakage of the valve, which has good isolation and shielding effects, avoids environmental pollution, reduces replacement investment and is simple to operate.
In order to realize the purpose, the adopted technical scheme is as follows:
an isolation shielding method for internal leakage of a valve comprises the following steps:
the isolating and shielding device for the internal leakage of the valve is adopted;
closing the valve 1 and the valve 2, and opening the valve 3, the valve 4, the valve 6 and the valve 7, wherein the pressure of the gas in the gas tank 1 is higher than that of the gas in the gas tank 2, and the pipeline 1 generates flow;
closing the valves 3 and 6, opening the valves 5 and 8, and detecting whether the valve 1 leaks from the valves 5 and 8; the valve 5 and the valve 8 are opened without internal leakage;
if the leakage occurs, the valve 5 and the valve 8 are closed, the valve 3 and the valve 6 are opened, and the leakage medium is recovered to the gas tank 2.
Compared with the prior art, the invention has the beneficial effects that:
1. the isolation shielding device and the method for the internal leakage of the valve can effectively detect leakage, can dilute leakage medium by inert gas when the internal leakage is determined, can be applied to poor sealing effect of the valve on a pipeline or equipment, and avoid accidents such as combustibility, explosion poisoning, environmental pollution and the like caused by the internal leakage.
2. The isolation shielding device and the method for the valve internal leakage have the advantages of good shielding effect, easy recovery of leaked substances, simple flow, high judgment accuracy, low investment cost, saving of investment for replacing the valve and good environmental protection effect.
3. The isolation shielding device and the method for the valve inner leakage solve the problem that the valve inner leakage cannot effectively cut off a pipeline and equipment, so that subsequent work cannot be carried out.
Drawings
FIG. 1 shows an isolation process apparatus and flow of the present invention.
Detailed Description
To further illustrate the isolation and shielding device and method for valve internal leakage according to the present invention, and to achieve the desired objects, the following detailed description is given with reference to the preferred embodiments of the isolation and shielding device and method for valve internal leakage according to the present invention, and the detailed description, structure, features and effects thereof. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The isolation shielding device and method for internal leakage of a valve according to the present invention will be described in further detail with reference to the following embodiments:
example 1.
Referring to the isolation process apparatus and the flow chart shown in fig. 1, in the figure, a valve 1 is VO1, a valve 2 is VO2, a valve 3 is V1, a valve 4 is V2, a valve 5 is V5, a valve 6 is V3, a valve 7 is V4, a valve 8 is V6, a gas tank 1 is P1, and a gas tank 2 is P2.
The device is as follows:
a pipeline between a valve 1(VO1) and a valve 2(VO2) which are communicated with the equipment is a pipeline 1, the pipeline 1 is communicated with a gas tank 1(P1) through the pipeline 2, and is communicated with the gas tank 2(P2) through a pipeline 3; and the connection of the line 2 to the line 1 is between the connection of the line 3 to the line 1 and the valve 1.
The gas tank 1(P1) is an inert gas tank; the pressure of the gas in the gas tank 1 is greater than the pressure of the gas in the gas tank 2.
Be provided with side leakage valve group 1 on pipeline 2, side leakage valve group 1 includes: valve 3(V1), valve 4(V2), and valve 5(V5), with valve 5(V5) being a leak detection valve.
Be provided with side leakage valve group 2 on the pipeline 3, side leakage valve group 2 includes: valve 6(V3), valve 7(V4) and valve 8(V6), valve 8(V6) being a leak detection valve.
The operation steps are as follows:
only when the tower and the equipment are overhauled and isolated, the valve 1(VO1) and the valve 2(VO2) are in a closed state, at the moment, the valve 3(V1), the valve 4(V2), the valve 6(V3) and the valve 7(V4) are opened, and the pressure of the gas tank 1(P1) is greater than that of the gas tank 2 (P2). The gas flows from high pressure to low pressure, and flows in the pipeline 1, and the gas route is as follows: the inert gas in the gas tank 1 flows through the line 2 to the line 1, and then flows through the line 3 to the gas tank 2 (P2).
Closing the valve 3(V1) and the valve 7(V4), opening the valve 5(V5) and the valve 8(V6), and detecting whether the valve 1(VO1) leaks inwards from the valve 5(V5) and the valve 8 (V6); without internal leakage, valve 5(V5) and valve 8(V6) were opened.
If there is an internal leakage, that is, if the presence of the medium is detected from (V5) and valve 8(V6), valve 5(V5) and valve 8(V6) are closed, valve 3(V1) and valve 7(V4) are opened, the leaked medium is recovered in gas tank 2(P2), and finally the mixed gas in gas tank 2(P2) is discharged to a centralized recovery tank or treated. The inert gas can dilute the leaked medium, and accidents of burning explosion, explosion poisoning, environmental pollution and the like caused by external leakage due to internal leakage are avoided.
The embodiment of the invention has been used in a plurality of places, the service life is more than 6 months, and the operation effect is better; at present, the use is expanded gradually in the later period when the medicine is continuously used.
Compared with the prior art, the method has the advantages that the investment is saved by always replacing the valve, the safety coefficient is improved, and the requirement standard for sealing the valve is reduced; the leakage of combustible, explosive, toxic and harmful gases caused by the internal leakage of the valve is effectively avoided; the leaked medium can be well recovered and treated, and the environment pollution is avoided; and the occurrence of secondary disasters is reduced.
The isolation shielding device and the method for the valve inner leakage have the advantages of obvious isolation shielding effect, easy recovery of leaked objects, convenient process operation, low valve replacement frequency, easy detection of the valve inner leakage, high accuracy of valve inner leakage detection, avoidance of accidents caused by valve inner leakage, reduction of work for frequently replacing the valve, investment cost saving, improvement of work efficiency and simplicity in operation.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (2)
1. An isolation barrier against leakage in a valve, comprising:
the pipeline between the adjacent valve 1 and the valve 2 is a pipeline 1, and the pipeline 1 is communicated with the gas tank 1 through the pipeline 2 and is communicated with the gas tank 2 through a pipeline 3; and the joint of the pipeline 2 and the pipeline 1 is positioned between the joint of the pipeline 3 and the pipeline 1 and the valve 1;
the gas tank 1 is an inert gas tank;
pipeline 2 on be provided with side leakage valve group 1, side leakage valve group 1 include: the valve 5 is a leak detection valve;
pipeline 3 on be provided with side leakage valve group 2, side leakage valve group 2 include: the valve 8 is a leak detection valve;
the pressure of the gas tank 1 is greater than the pressure of the gas tank 2.
2. The method for isolating and shielding the internal leakage of the valve is characterized by comprising the following steps of:
an isolation shield for internal leakage of the valve of claim 1;
closing the valve 1 and the valve 2, opening the valve 3, the valve 4, the valve 6 and the valve 7, wherein the pressure of the gas tank 1 is higher than that of the gas tank 2, and the pipeline 1 generates flow;
closing the valves 3 and 6, opening the valves 5 and 8, and detecting whether the valve 1 leaks from the valves 5 and 8; the valve 5 and the valve 8 are opened without internal leakage;
if the leakage occurs, the valve 5 and the valve 8 are closed, the valve 3 and the valve 6 are opened, and the leakage medium is recovered to the gas tank 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910201515.0A CN109737316B (en) | 2019-03-18 | 2019-03-18 | Isolation shielding device and method for valve inner leakage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910201515.0A CN109737316B (en) | 2019-03-18 | 2019-03-18 | Isolation shielding device and method for valve inner leakage |
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| CN109737316B true CN109737316B (en) | 2021-08-17 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279326A (en) * | 1993-01-21 | 1994-01-18 | Lin Chi San | Safety valve |
| CN101487760A (en) * | 2009-02-17 | 2009-07-22 | 姜英杰 | Valve leak-checking apparatus |
| CN203455138U (en) * | 2013-08-09 | 2014-02-26 | 中国石油天然气股份有限公司 | Gas pipeline valve inner leakage detection apparatus based on microwave technologies |
| CN203519267U (en) * | 2013-10-23 | 2014-04-02 | 江苏圣奥化学科技有限公司 | Gas leakage detection device |
| CN103940559A (en) * | 2014-04-14 | 2014-07-23 | 石家庄新奥燃气有限公司 | Leak detection device for valve |
| CN203811339U (en) * | 2014-04-14 | 2014-09-03 | 石家庄新奥燃气有限公司 | Valve leak detection device |
| CN105674055A (en) * | 2016-01-19 | 2016-06-15 | 康乃尔化学工业股份有限公司 | Nitrogen valve group used for safety protection |
| CN207074106U (en) * | 2017-08-24 | 2018-03-06 | 中石化川气东送天然气管道有限公司 | A kind of double-piston valve leakage detection apparatus |
| CN207336006U (en) * | 2017-10-26 | 2018-05-08 | 西安圆方环境卫生检测技术有限公司 | A kind of gas circuit missing inspection device of gas sampler |
| CN108871695B (en) * | 2018-06-08 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | Leakage detection device used before lithium battery liquid injection |
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