CN111006823A - Self-sealing test flange and sealing monitoring method - Google Patents
Self-sealing test flange and sealing monitoring method Download PDFInfo
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- CN111006823A CN111006823A CN201911352745.3A CN201911352745A CN111006823A CN 111006823 A CN111006823 A CN 111006823A CN 201911352745 A CN201911352745 A CN 201911352745A CN 111006823 A CN111006823 A CN 111006823A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
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Abstract
The invention discloses a self-sealing test flange and a sealing monitoring method, wherein the self-sealing test flange comprises a flange body and a sealing test assembly connected to the flange body; the sealing test assembly comprises a test tube, test holes, test slots and a test connector, wherein the test slots are annularly arranged on the sealing contact surface of the flange body, the outer surfaces of the test slots and the flange body are communicated through the test holes, and the test holes are connected with the test connector through the test tube. The self-sealing test flange has the advantages of simple structure, convenience in operation, test time saving, pressure test and air tightness cost saving, strong pertinence, capability of realizing real-time sealing monitoring during flange application and the like, and solves the problems of high labor cost, high cost consumption, long test time, low test precision, insufficient pertinence, incapability of monitoring sealing failure in the flange application process and the like in the traditional test operation.
Description
Technical Field
The invention belongs to the technical field of flange sealing, and particularly relates to a self-sealing test flange and a sealing monitoring method.
Background
In oil development engineering, the connection between equipment and a pipeline system is generally performed through flanges with various pressure grades, and a large amount of oil and gas exist in a medium for conveying and processing, so that the sealing performance of the connection position of each flange needs to be detected for production safety. Generally, the sealing performance of a common flange joint needs to be first tested for strength by high pressure water and then tested for high pressure gas tightness. Setting a starting point and a final point of a process pipeline flow, isolating the starting point and the final point by using blind flanges, injecting a high-pressure medium into the pipeline by an external pressurizing pump, gradually increasing the pressure to a sealing test pressure, and then carrying out sealing inspection on sealing surfaces one by one. However, the whole process is often required to participate in the sealing test, and the situation that the sealing test of the whole process pipeline process is difficult to perform due to the fact that a few flange surfaces are not tightly sealed is easily caused. The defects of high labor cost, high expense consumption, long testing time, low testing precision, insufficient pertinence and the like exist, and due to the frequent disassembly and assembly of equipment frequently existing in the engineering construction period, the conventional sealing test in the case can cause a large amount of repeated pressure tests and airtight operation, and the cost is quite high. Meanwhile, even the flange which is subjected to the sealing test is easy to generate micro leakage caused by external factors (such as vibration, temperature change and the like) and internal factors (such as production condition change, mechanical fatigue and the like) in a long-term production process, and if real-time monitoring is not carried out, equipment loss and even safety accidents can be caused.
Therefore, in the technical field of flange sealing, it is very important and necessary to design a method for performing a self-sealing test on a flange and performing a real-time sealing monitoring, and the method is designed based on solving the problems in the conventional flange sealing test process and the sealing monitoring problem in the subsequent production process.
Disclosure of Invention
The self-sealing test flange has the advantages of simple structure, convenience in operation, test time saving, pressure test and air tightness cost saving, strong pertinence, capability of realizing real-time sealing monitoring during flange application and the like, and solves the problems that the traditional test operation is high in labor cost, high in cost consumption, long in test time, low in test precision, insufficient in pertinence, incapable of monitoring sealing failure in the flange application process and the like.
The invention adopts the following technical scheme:
a self-sealing test flange comprises a flange body and a sealing test assembly connected to the flange body.
The sealing test assembly comprises a test tube, test holes, test slots and a test connector, wherein the test slots are annularly arranged on the sealing contact surface of the flange body, the outer surfaces of the test slots and the flange body are communicated through the test holes, and the test holes are connected with the test connector through the test tube.
The sealing contact surface of the flange body is a full plane, a concave surface, a convex surface, a tenon surface, a convex surface, a groove surface and a ring connecting surface respectively, and the area of the sealing contact surface is enough to be provided with the test groove and to be in contact sealing with the gasket.
The test tube is connected in the test hole of the flange body in a welding or threaded connection mode.
The test hole is L-shaped.
The test joint connects an external high-pressure hose for high-pressure water and high-pressure airtight medium and a pressure gauge to the test joint through a tee joint, and the other end of the high-pressure hose is connected with a pressurizing pump.
The test joint is connected with a pressure monitoring system.
A sealing monitoring method of a self-sealing test flange comprises the following steps:
s1, connecting a sealing contact surface of a flange body with a gasket;
s2, installing a tee joint component on the test joint;
s3, respectively connecting a high-pressure hose of high-pressure water and a high-pressure airtight medium and a pressure gauge to two interfaces of the three-way component, connecting the other end of the high-pressure hose to an external pressurizing pump, and adjusting a preset pressure value of the pressurizing pump to meet the sealing test requirement;
s4, pumping high-pressure water or an air-tight medium into the test groove of the flange body through an external pressurizing pump until the pressure is preset, and recording the indication number of a pressure gauge;
s5, recording the readings of the pressure gauge at each time point, comparing the readings with the readings of the pressure gauge in the step S4, and judging the sealing performance: if the indication number of the pressure gauge at each time point is reduced and is within the error allowable range, the sealing performance is considered to be good, otherwise, the sealing performance is not good, and the steps S1, S2, S3, S4 and S5 are repeated until the sealing performance is good after the gasket is replaced;
s6, stopping the external pressurizing pump, releasing pressure, and then sequentially removing the pressure gauge, the high-pressure hose and the three-way component;
and S7, connecting the pressure monitoring system through the test connector so as to monitor the sealing performance of the flange in real time.
Compared with the prior art, the invention has the beneficial effects that: 1. simple structure, the design is more reasonable, not only is unanimous with ordinary flange in the function, and can realize sealed face self sealss test and real-time supervision. 2. The operation is simple, the operation of sealing test (including water pressure test, high pressure airtightness and the like) can be carried out only by connecting the test connector 5 of the self-sealing test flange through the external pressurizing pump, the cost is reduced, and the time is saved. 3. The performance is reliable, even the test pipe 2 or the test connector 5 of self sealss test flange break off and also can not cause the influence to sealing performance, still keep the function of flange, and can accomplish the maintenance fast. 4. The tightness detection is more targeted, and an operator can conveniently and timely preprocess the joint according to the test result. 5. Can carry out real-time sealed monitoring to the flange in the application process through external pressure monitoring system, in time take measures, prevent suffering from in the bud. 6. The method is suitable for flange seal detection of equipment and systems in the field of petroleum engineering, and is also suitable for flange seal test of equipment and pipeline systems in other fields.
Drawings
FIG. 1 is a top view of an RTJ style self sealing test flange of the present invention;
FIG. 2 is a cross-sectional view of an RTJ style self-sealing test flange of the present invention;
FIG. 3 is a top view of a planar form self-sealing test flange of the present invention;
FIG. 4 is a cross-sectional view of a planar form self-sealing test flange of the present invention.
In the figure: the test device comprises a flange body 1, a test tube 2, test holes 3, test grooves 4 and test joints 5.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and with reference to the following drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, 2, 3 and 4, a self-sealing test flange comprises a flange body 1 and a sealing test assembly connected to the flange body 1, wherein the sealing test assembly is used for connecting an external pressurizing pump, and high-pressure water or high-pressure airtight medium is introduced to a sealing contact surface of the flange body 1 and a gasket sealing surface through the pressurizing pump to reach a required pressure so as to detect sealing performance;
the sealing test assembly comprises a test tube 2, a test hole 3, a test slot 4 and a test connector 5, wherein the test slot 4 is annularly arranged on a sealing contact surface of a flange body 1, the test slot 4 is communicated with the outer surface of the flange body 1 through the test hole 3, the test hole 3 is connected with the test connector 5 through the test tube 2, the test connector 5 is connected with an external pressurizing pump when sealing test is carried out, and after the sealing test is completed, the test connector 5 is connected with a pressure monitoring system to monitor possible micro-leakage of a flange connecting piece in the production process, so that measures can be taken in time and the flange connecting piece is prevented from getting in the bud.
The sealing contact surface of the flange body 1 in contact sealing with the gasket is enough in area to be provided with the test slot 4, preferably, the types of the sealing contact surface are full plane, concave surface, convex surface, tenon surface, convex surface, groove surface and ring connecting surface, and the area of the sealing contact surface is enough to be provided with the test slot 4 and be in contact sealing with the gasket.
The test tube 2 is connected in the test hole 3 of the flange body 1 in a welding or threaded connection mode.
The test holes 3 penetrate through the outer surface of the flange to the test slots 4, and are generally arranged in an L shape for convenient processing.
The test slots 4 are arranged on the sealing contact surfaces of the flange body 1, which are in contact with the gaskets, so that the sealing contact surfaces on the two sides of the test slots 4 can meet the sealing requirements.
The test connector 5 is provided with a sealing ring and a pipe cap, the pipe cap is opened during testing, an external high-pressure hose of high-pressure water and high-pressure airtight medium and a pressure gauge are connected to the test connector 5 through a tee joint, the other end of the high-pressure hose is connected with a pressurizing pump, and the tee joint is connected with the sealing ring on the test connector 5.
The pressure monitoring system has high sensitivity, can monitor possible micro leakage of the flange connecting piece caused by external factors such as vibration and temperature change and/or internal factors such as production condition change and mechanical fatigue in the production process in real time, and takes measures according to the monitoring result to prevent the flange connecting piece from being damaged in the bud.
A sealing monitoring method of a self-sealing test flange comprises the following steps:
s1, connecting a sealing contact surface of a flange body 1 with a gasket, and firmly meeting test specifications and requirements through bolt torque;
s2, disassembling a pipe cap on the test joint 5, and installing a tee joint component on the test joint 5, wherein the tee joint component is fastened and sealed as required;
s3, respectively connecting a high-pressure hose of high-pressure water and a high-pressure airtight medium and a pressure gauge to two connectors of the three-way component and fastening the two connectors according to requirements, connecting the other end of the high-pressure hose to an external pressurizing pump, and adjusting the pressure preset value of the pressurizing pump to the pressure required by a sealing test;
s4, high-pressure water or an air-tight medium is pumped into the test groove 4 of the flange body 1 through an external pressurizing pump until the pressure is preset, and the indication number of a pressure gauge is recorded;
s5, carrying out sealing test according to the standard sealing test time requirement, recording the readings of the pressure gauge at each time point, comparing the readings with the readings of the pressure gauge in the step S4, and judging the sealing performance: if the indication number of the pressure gauge at each time point is reduced and is within the error allowable range, the sealing performance is considered to be good, otherwise, the sealing performance is not good, and the steps S1, S2, S3, S4 and S5 are repeated until the sealing performance is good after the gasket is replaced;
s6, stopping the external pressurizing pump, releasing pressure, and then sequentially removing the pressure gauge, the high-pressure hose and the three-way component;
and S7, connecting the pressure monitoring system through the test connector 5 so as to monitor the sealing performance of the flange in real time.
In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore should not be construed as limiting the scope of the present invention.
In conclusion, although the present invention has been described with reference to the preferred embodiments, it should be noted that, although various changes and modifications may be made by those skilled in the art, they should be included in the scope of the present invention unless they depart from the scope of the present invention.
Claims (8)
1. A self-sealing test flange which characterized in that: the sealing test device comprises a flange body (1) and a sealing test component connected to the flange body (1).
2. A self-sealing test flange according to claim 1, wherein: the sealing test assembly comprises a test tube (2), a test hole (3), a test slot (4) and a test connector (5), wherein the test slot (4) is annularly arranged on a sealing contact surface of the flange body (1), the test slot (4) is communicated with the outer surface of the flange body (1) through the test hole (3), and the test hole (3) is connected with the test connector (5) through the test tube (2).
3. A self-sealing test flange according to claim 1, wherein: the sealing contact surface of the flange body (1) is a full plane, a concave surface, a convex surface, a tenon surface, a convex surface, a groove surface and a ring connecting surface respectively, and the area of the sealing contact surface is enough to arrange the test groove (4) and to be in contact sealing with the gasket.
4. A self-sealing test flange according to claim 2, wherein: the test tube (2) is connected in the test hole (3) of the flange body (1) in a welding or threaded connection mode.
5. A self-sealing test flange according to claim 2, wherein: the test hole (3) is L-shaped.
6. A self-sealing test flange according to claim 2, wherein: the test joint (5) is connected with an external high-pressure hose of high-pressure water and high-pressure airtight medium and a pressure gauge through a tee joint, and the other end of the high-pressure hose is connected with a pressurizing pump.
7. A self-sealing test flange according to claim 2, wherein: the test joint (5) is connected with a pressure monitoring system.
8. A sealing monitoring method of a self-sealing test flange is characterized in that: the method comprises the following steps:
s1, connecting a sealing contact surface of a flange body with a gasket;
s2, installing a tee joint component on the test joint;
s3, respectively connecting a high-pressure hose of high-pressure water and a high-pressure airtight medium and a pressure gauge to two interfaces of the three-way component, connecting the other end of the high-pressure hose to an external pressurizing pump, and adjusting a preset pressure value of the pressurizing pump to meet the sealing test requirement;
s4, pumping high-pressure water or an air-tight medium into the test groove of the flange body through an external pressurizing pump until the pressure is preset, and recording the indication number of a pressure gauge;
s5, recording the readings of the pressure gauge at each time point, comparing the readings with the readings of the pressure gauge in the step S4, and judging the sealing performance: if the indication number of the pressure gauge at each time point is reduced and is within the error allowable range, the sealing performance is considered to be good, otherwise, the sealing performance is not good, and the steps S1, S2, S3, S4 and S5 are repeated until the sealing performance is good after the gasket is replaced;
s6, stopping the external pressurizing pump, releasing pressure, and then sequentially removing the pressure gauge, the high-pressure hose and the three-way component;
and S7, connecting the pressure monitoring system through the test connector so as to monitor the sealing performance of the flange in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911352745.3A CN111006823A (en) | 2019-12-25 | 2019-12-25 | Self-sealing test flange and sealing monitoring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911352745.3A CN111006823A (en) | 2019-12-25 | 2019-12-25 | Self-sealing test flange and sealing monitoring method |
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| CN111006823A true CN111006823A (en) | 2020-04-14 |
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| CN201911352745.3A Pending CN111006823A (en) | 2019-12-25 | 2019-12-25 | Self-sealing test flange and sealing monitoring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111912581A (en) * | 2020-07-07 | 2020-11-10 | 海洋石油工程股份有限公司 | Single-group flange tightness test method |
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| CN105422854A (en) * | 2015-12-29 | 2016-03-23 | 周庆涛 | Self-pressure test gasket and application method thereof |
| CN105782443A (en) * | 2015-12-28 | 2016-07-20 | 苏州宝骅机械技术有限公司 | Sealing assembly capable of detecting leaking medium pressure and application method thereof |
| CN207456712U (en) * | 2017-09-28 | 2018-06-05 | 苏州优力克流体控制科技有限公司 | A kind of pressure test device for thread seal |
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2019
- 2019-12-25 CN CN201911352745.3A patent/CN111006823A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4019371A (en) * | 1976-01-28 | 1977-04-26 | Exxon Production Research Company | Apparatus and method for externally testing conduit connections |
| CN101074897A (en) * | 2006-05-19 | 2007-11-21 | 三菱瓦斯化学株式会社 | Leakage detecting system for joint |
| CN203375037U (en) * | 2013-06-21 | 2014-01-01 | 上海锐迈重工有限公司 | Flange gasket |
| CN204740107U (en) * | 2015-03-26 | 2015-11-04 | 自贡市佳世特密封制品有限公司 | O type sealing washer leak rate detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111912581A (en) * | 2020-07-07 | 2020-11-10 | 海洋石油工程股份有限公司 | Single-group flange tightness test method |
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Application publication date: 20200414 |