CN202757736U - Flange surface microscale leakage on-line monitoring system - Google Patents
Flange surface microscale leakage on-line monitoring system Download PDFInfo
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- CN202757736U CN202757736U CN 201220435548 CN201220435548U CN202757736U CN 202757736 U CN202757736 U CN 202757736U CN 201220435548 CN201220435548 CN 201220435548 CN 201220435548 U CN201220435548 U CN 201220435548U CN 202757736 U CN202757736 U CN 202757736U
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Abstract
Disclosed is a flange surface microscale leakage on-line monitoring system, comprising a sealing sleeve (1), a connecting pipeline (2), a pressure transmitter (3), and an alarm (4), wherein the sealing sleeve (1) is used for sleeving the flange directly connected with a tank and forming a sealed space; the sealing sleeve (1) is provided with a hole which is connected to the pressure transmitter (3) via the connecting pipeline (2); the pressure transmitter (3) is used for detecting the pressure inside the sealed space formed by the sealing sleeve (1); and when the pressure is greater than the preset value, the pressure transmitter (3) sends signals to the alarm (4) for alarming. Unaffected by the external environment, the flange surface microscale leakage on-line monitoring system of the utility model is capable of rapidly monitoring the flange surface microscale leakage situation. The operators can be timely informed at the initial stage of the leakage, thereby avoiding the happening of greater leakage and minimizing the risk to the lowest level.
Description
Technical field
The utility model relates to a kind of device for the gas-monitoring leakage, specifically refers to a kind of flange face micro-leakage on-line monitoring system.
Background technology
A big-and-middle-sized petrochemical unit, its flange connecting point number have several ten thousand and even hundreds of thousands usually.Each flange connecting point place might become a leakage point, and flange seal leaks and not only causes the wasting of resources, environmental pollution, even cause fire disaster or personnel's injury accident.Continuing, grasping flange sealing surface leakage situation exactly is the problem that the apparatus manager must pay attention to.
The personnel that mostly take patrol and examine the mode that combines with combustible gas probe and grasp the flange face sealing situation at present.Owing to do not realize on-line monitoring, can not realize continuing to monitor in 24 hours.Flange face sealing leaks the evolution that usually has without leakage, seepage, leakage, serious leakage, complete failure, in the initial period of leaking, is difficult to by patrolling and examining timely identification, has missed best reaction opportunity.Combustible gas probe generally all is installed in the petrochemical equipment, warning can be provided when Leakage Gas occurs or produces certain shutoff behavior.But to being built in the device in open spaciousness zone, only have the gas buildup when leakage to arrive finite concentration ability trigger alarm, limited promptness and the accuracy of detector, and be subjected to environmental factor, larger such as the impact of wind direction, wind-force.
Above-mentioned discussion content purpose is to introduce to the reader various aspects of technology that may be relevant with the various aspects of the present utility model that below will be described and/or advocate, believe that this discussion content helps to provide background information for the reader, to be conducive to understanding better various aspects of the present utility model, therefore, should be appreciated that it is to read these discussions with this angle, rather than admit prior art.
The utility model content
The purpose of this utility model is to avoid deficiency of the prior art and a kind of flange face micro-leakage on-line monitoring system is provided, this system can monitor the micro-leakage situation of flange face accurately and rapidly, be not subjected to environmental interference, just can in time be operated personal identification in the initial period of leaking generation, avoid the more generation of gross leak, risk is reduced to minimum.
The purpose of this utility model is achieved through the following technical solutions:
A kind of flange face micro-leakage on-line monitoring system is provided, comprise seal sleeve, connecting line, pressure unit, alarm, described seal sleeve is in order to entangle the flange that directly links to each other with tank body and to form seal cavity, described seal sleeve is offered porose, the hole is connected to pressure unit by connecting line, pressure unit is in order to detecting the pressure in the formed seal cavity of seal sleeve, and when pressure during greater than preset value, pressure unit sends a signal to alarm to report to the police.
Wherein, also comprise shut-off valve, described shut-off valve is used for the gas path on-off between the control formed seal cavity of seal sleeve and the pressure unit.
Wherein, also comprise nitrogen pot, in the described nitrogen pot access connecting line, be provided with communicating valve between nitrogen pot and the connecting line.
Wherein, described seal sleeve is connected to blowdown valve.
Wherein, described connecting line is connected to main blowdown valve.
Wherein, described seal sleeve is at least two, and the gas circuit between the formed seal cavity of each seal sleeve and the pressure unit is respectively by a shut-off valve control break-make.
Owing to adopted above-mentioned structure, the seal cavity volume between seal sleeve and the flange face is little, and the Leakage Gas of trace can cause that namely seal cavity pressure escalates, and when pressure during greater than preset value, pressure unit sends a signal to alarm to report to the police.The utility model is not subjected to external environmental interference, and energy Fast Monitoring flange face micro-leakage situation just can in time be operated personal identification in the initial period of leaking generation, avoids the more generation of gross leak, risk is reduced to minimum.
Main beneficial effect of the present utility model:
1) flange face micro-leakage on-line monitoring system is simple in structure, construction, installation period weak point.
2) can just can in time be operated personal identification in the initial period that the flange face leakage occurs, avoid the more generation of gross leak, risk is reduced to minimum.
3) pressure unit can be monitored a plurality of flange faces simultaneously, reduces initial investment and later maintenance expense, is convenient to management.
Description of drawings
The utility model is described in further detail to utilize accompanying drawing, but the embodiment in the accompanying drawing does not consist of any restriction of the present utility model, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain according to the following drawings other accompanying drawing.
Fig. 1 is the structural representation of flange face micro-leakage on-line monitoring system.
In Fig. 1, include: 1---seal sleeve, 2---connecting line, 3---pressure unit, 4---alarm, 5---shut-off valve, 6---nitrogen pot, 7---communicating valve, 8---blowdown valve, 9---the main blowdown valve of tank body, 10---flange, 11---.
Embodiment
In order to make those skilled in the art understand better the technical solution of the utility model, below in conjunction with the drawings and specific embodiments the utility model is described in further detail, need to prove, in the situation of not conflicting, the application's embodiment and the feature among the embodiment can make up mutually.
Core of the present utility model is to provide a kind of flange face micro-leakage on-line monitoring system, it can monitor the micro-leakage situation of flange face accurately and rapidly, be not subjected to environmental interference, just can in time be operated personal identification in the initial period of leaking generation, avoid the more generation of gross leak, risk is reduced to minimum.
As shown in Figure 1, flange face micro-leakage on-line monitoring system described in the utility model comprises seal sleeve 1, connecting line 2, pressure unit 3, alarm 4.
Described seal sleeve 1 is in order to entangle the flange 10 that directly links to each other with tank body 9 and to form seal cavity.For in time, show the pressure of each sealing shroud exactly, an important factor is exactly the good sealing property of seal sleeve.The seal sleeve major function is the initial period gathering pressure that occurs leaking, and pressure rating is not high.The mode that the sealing surface of seal sleeve adopts plain cushion, lining to combine with clamping screw.Seal sleeve need be designed to detachable, when finding that a seal sleeve pressure is elevated to alarming value, can open this sleeve, confirms corresponding flange situation in order to check.
Described seal sleeve 1 is offered porose, and the hole is connected to pressure unit 3 by connecting line 2.Pressure unit mainly is comprised of load cell (being also referred to as pressure transducer), metering circuit and process web member three parts.The physical pressure parameters such as the gas that it can be experienced load cell, liquid are transformed into the electric signal (such as 4 ~ 20mADC etc.) of standard, and the secondary instruments such as indicator alarm, registering instrument, regulator are measured to supply with, indication and procedure regulation.Pressure unit 3 is in order to detecting the pressure in the seal sleeve 1 formed seal cavity, and when pressure during greater than preset value, pressure unit 3 sends a signal to alarm 4 to report to the police.
Preferably, also comprise shut-off valve 5, the gas path on-off that described shut-off valve 5 is used between control seal sleeve 1 formed seal cavity and the pressure unit 3.
Preferably, also comprise nitrogen pot 6, in the described nitrogen pot 6 access connecting lines 2, be provided with communicating valve 7 between nitrogen pot 6 and the connecting line 2.Nitrogen cylinder purges in order to open the seal sleeve control flange situation of leaking before, prevents from forming damp, keeps each seal sleeve pressure-fired under normal condition.
Preferably, described seal sleeve 1 is connected to blowdown valve 8, and described connecting line 2 is connected to main blowdown valve 11.
Preferably, described seal sleeve 1 is at least two, and the gas circuit between each seal sleeve 1 formed seal cavity and the pressure unit 3 is respectively by a shut-off valve 5 control break-makes.The corresponding shut-off valve 5 of switch can confirm whether flange, the seal sleeve sealing property of concrete which leakage be normal.Like this, the pressure that pressure unit can detect whole closed system changes, and can monitor simultaneously a plurality of flange faces by a pressure unit, reduces initial investment and later maintenance expense, is convenient to management.
Job step of the present utility model is as follows:
Open communicating valve, be filled with nitrogen in the system, keep pressure-fired (7Kpa), enter with secluding air, then close communicating valve.When pressure unit pressure reached 50Kpa, leaking appearred in the flange that expressed possibility, and operating personnel operate according to following steps, to confirm leakage point.
1. close successively shut-off valve;
2. open main blowdown valve, the pressure of observing pressure unit changes, and when showing that pressure is 0, closes main blowdown valve;
3. open the shut-off valve of one of them seal sleeve, the pressure of observing and record pressure unit changes, if show that pressure increases to 50Kpa gradually, then the corresponding flange of this shut-off valve is one of leakage point;
Do not change if 4. open the pressure of pressure unit behind the above-mentioned shut-off valve, close this shut-off valve, open the shut-off valve of another seal sleeve, repeating step 2 ~ 4;
5. test successively all seal sleeves, the seal sleeve that record pressure occur to go up, and transfer to mechanical personnel and further check affirmation.
When normal condition, in sleeve, be filled with nitrogen, to keep pressure-fired.Residual air in the time of on the one hand can draining installing sleeve when having LPG to leak, can not form damp; Can detect on the other hand the sealing of seal sleeve, when pressure unit shows that pressure-fired pressure slowly drops to 0, after confirming that working sensor is normal, need to consider that sealing shroud leaks.Confirm that according to following steps concrete which seal sleeve sealing surface lost efficacy:
1. regulate communicating valve, make pressure unit be shown as 50Kpa;
2. with each seal sleeve sealing surface of fluid inspection that leaks hunting, instrument pipeline junction, pressure relief valve place whether bubble is arranged, if having, then the sealing sleeve may lose efficacy;
3. record detects the seal sleeve that bubble occurs, the machinery personnel open seal sleeve, further check affirmation, maintaining, when confirming certain flange leakage, perhaps the sealing surface of certain seal sleeve lost efficacy, before opening the sealing sleeve and detecting maintenance, need purge with nitrogen, prevent from forming explosive mixed gases.
Set forth a lot of details so that fully understand the utility model in the top description, still, the utility model can also adopt other to be different from other modes described here and implement, and therefore, can not be interpreted as the restriction to the utility model protection domain.
In a word; although the utility model has exemplified above-mentioned preferred implementation; but should illustrate; although those skilled in the art can carry out various variations and remodeling; unless such variation and remodeling have departed from scope of the present utility model, otherwise all should be included in the protection domain of the present utility model.
Claims (6)
1. flange face micro-leakage on-line monitoring system, it is characterized in that: comprise seal sleeve (1), connecting line (2), pressure unit (3), alarm (4), described seal sleeve (1) is in order to entangle the flange that directly links to each other with tank body and to form seal cavity, described seal sleeve (1) is offered porose, the hole is connected to pressure unit (3) by connecting line (2), pressure unit (3) is in order to detect the pressure in the formed seal cavity of seal sleeve (1), when pressure during greater than preset value, pressure unit (3) sends a signal to alarm (4) to report to the police.
2. flange face micro-leakage on-line monitoring system according to claim 1, it is characterized in that: also comprise shut-off valve (5), described shut-off valve (5) is used for the gas path on-off between the control formed seal cavity of seal sleeve (1) and the pressure unit (3).
3. flange face micro-leakage on-line monitoring system according to claim 1, it is characterized in that: also comprise nitrogen pot (6), in described nitrogen pot (6) the access connecting line (2), be provided with communicating valve (7) between nitrogen pot (6) and the connecting line (2).
4. flange face micro-leakage on-line monitoring system according to claim 1, it is characterized in that: described seal sleeve (1) is connected to blowdown valve (8).
5. flange face micro-leakage on-line monitoring system according to claim 1, it is characterized in that: described connecting line (2) is connected to main blowdown valve (11).
6. each described flange face micro-leakage on-line monitoring system in 5 according to claim 1, it is characterized in that: described seal sleeve (1) is at least two, and the gas circuit between the formed seal cavity of each seal sleeve (1) and the pressure unit (3) is respectively by a shut-off valve (5) control break-make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435548 CN202757736U (en) | 2012-08-30 | 2012-08-30 | Flange surface microscale leakage on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435548 CN202757736U (en) | 2012-08-30 | 2012-08-30 | Flange surface microscale leakage on-line monitoring system |
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| CN202757736U true CN202757736U (en) | 2013-02-27 |
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| CN 201220435548 Expired - Fee Related CN202757736U (en) | 2012-08-30 | 2012-08-30 | Flange surface microscale leakage on-line monitoring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604045A (en) * | 2013-08-24 | 2014-02-26 | 北京工业大学 | Experiment system for leakage characteristics of buried oil pipelines |
| CN103791238A (en) * | 2014-02-18 | 2014-05-14 | 北京工业大学 | Experimental apparatus for measuring medium leakage characteristic of fuel gas pipeline |
| CN104599039A (en) * | 2014-12-26 | 2015-05-06 | 合肥通用机械研究院 | Intelligent leakage management system for pipeline |
| CN105444964A (en) * | 2014-08-15 | 2016-03-30 | 宝山钢铁股份有限公司 | Method and device for detecting leakproofness of lubricating oil pocket of transmission shaft gear case side |
| CN108151972A (en) * | 2017-12-11 | 2018-06-12 | 中国海洋石油集团有限公司 | Large container end cap flange leakage detection method and its detection instrument |
-
2012
- 2012-08-30 CN CN 201220435548 patent/CN202757736U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604045A (en) * | 2013-08-24 | 2014-02-26 | 北京工业大学 | Experiment system for leakage characteristics of buried oil pipelines |
| CN103604045B (en) * | 2013-08-24 | 2015-10-28 | 北京工业大学 | A kind of Buried Oil Pipelines leakage characteristics experimental system |
| CN103791238A (en) * | 2014-02-18 | 2014-05-14 | 北京工业大学 | Experimental apparatus for measuring medium leakage characteristic of fuel gas pipeline |
| CN105444964A (en) * | 2014-08-15 | 2016-03-30 | 宝山钢铁股份有限公司 | Method and device for detecting leakproofness of lubricating oil pocket of transmission shaft gear case side |
| CN105444964B (en) * | 2014-08-15 | 2019-04-19 | 宝山钢铁股份有限公司 | The airtightness detection method and device of the lubricating oil packet of shaft gear case side |
| CN104599039A (en) * | 2014-12-26 | 2015-05-06 | 合肥通用机械研究院 | Intelligent leakage management system for pipeline |
| CN108151972A (en) * | 2017-12-11 | 2018-06-12 | 中国海洋石油集团有限公司 | Large container end cap flange leakage detection method and its detection instrument |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20180830 |