CN204314032U - High-temperature pipe flange compactedness test macro - Google Patents

High-temperature pipe flange compactedness test macro Download PDF

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Publication number
CN204314032U
CN204314032U CN201420732779.1U CN201420732779U CN204314032U CN 204314032 U CN204314032 U CN 204314032U CN 201420732779 U CN201420732779 U CN 201420732779U CN 204314032 U CN204314032 U CN 204314032U
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China
Prior art keywords
flange
pipeline
cavity
valve
measured
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420732779.1U
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Chinese (zh)
Inventor
王明伍
郑小涛
周欢
喻九阳
林纬
徐建民
王成刚
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Wuhan Institute of Technology
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Wuhan Institute of Technology
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Priority to CN201420732779.1U priority Critical patent/CN204314032U/en
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Publication of CN204314032U publication Critical patent/CN204314032U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a kind of high-temperature pipe flange compactedness test macro, it comprises left pipeline, right pipeline, and connecting the flange of left pipeline and right pipeline, described flange adopts pad to seal, and left pipeline, right pipeline, flange form flange cavity to be measured; Left pipeline is connected with pump by valve, and right pipeline welds with blind plate; Temperature sensor, pressure transducer, electric heater unit is provided with in flange cavity to be measured; Described flange is outside equipped with flange leakage mechanism for testing, described flange leakage mechanism for testing comprises the cavity that leaks hunting surrounded by the wall that leaks hunting, the described wall that leaks hunting is provided with imported valve, underflow opening valve, vent valve, described in leak hunting in cavity and be provided with temperature sensor, pressure transducer.The utility model leak tested accuracy rate is high, all has stronger directive significance to scientific research and engineering.

Description

High-temperature pipe flange compactedness test macro
Technical field
The utility model relates to a set of flange test macro, is specifically related to a kind of high-temperature pipe flange compactedness test macro.
Background technology
Flange joint is connected mode conventional in petrochemical equipment, because it has the advantage being easy to remove and install, in the pressure vessel being widely used in the industries such as petrochemical industry, nuclear power, metallurgy, pharmacy and pipeline.Along with the contradiction of economic development and energy supply, oil refining and Chemical Engineering Technology develop rapidly, ubiquity high temperature and high pressure condition in various refinery device.Under high-temperature operation condition, the changes such as flange may deflect, warpage, creep, Crack Extension, thus make pipeline produce and reveal.It is the one of the main reasons that major accident occurs in the enterprises such as petrochemical complex that high-temperature flange leaks.Therefore, we are necessary to design the slip of a kind of high-temperature pipe flange compactedness test macro at high temperature flange and analyze, to ensure the security that pipeline connects.
Utility model content
The purpose of this utility model is to provide a kind of high-temperature pipe flange compactedness test macro, and this test macro accurately can test the leakage of hot conditions lower flange, thus draws slip, ensure produce, construction carry out smoothly.
The utility model is achieved in that a kind of high-temperature pipe flange compactedness test macro, it comprises left pipeline, right pipeline, and connecting the flange of left pipeline and right pipeline, described flange adopts pad to seal, and left pipeline, right pipeline, flange form flange cavity to be measured;
Described left pipeline is connected with pump by valve, and described right pipeline welds with blind plate; Be provided with in described flange cavity to be measured temperature sensor, pressure transducer, by electric heater electricity cabinet control electric heater unit;
Described flange is outside equipped with flange leakage mechanism for testing, described flange leakage mechanism for testing comprises the cavity that leaks hunting surrounded by the wall that leaks hunting, the described wall that leaks hunting is provided with imported valve, underflow opening valve, vent valve, described in leak hunting in cavity and be provided with temperature sensor, pressure transducer;
Described right pipeline is provided with vent valve, blowdown valve.
In this high-temperature pipe flange compactedness test macro, the left end of flange cavity to be measured is provided with a pump, the export pipeline of pump has a valve, export pipeline is directly connected with left pipeline, with pump by medium transport in flange cavity to be measured, and pressure transducer and temperature sensor being set in flange cavity to be measured, the temperature of medium in this temperature sensor monitors flange cavity to be measured, the pressure in flange cavity to be measured measured by this pressure transducer; Vent valve is provided with above pipeline; Flange adopts bolt to connect, and seals with pad; The positive middle part of described flange cavity to be measured is provided with an electric heater unit, can heat medium in flange cavity to be measured.
Described flange leakage mechanism for testing is primarily of the cavity that leaks hunting, temperature sensor, pressure transducer composition; The described cavity that leaks hunting is provided with the imported valve of measurement medium entrance, conveniently uses when needs are filled with measurement medium; The described cavity that leaks hunting is provided with vent valve and underflow opening valve, described drain tap, underflow opening valve also can be used for being filled with medium.
Pump is utilized to manufacture hyperbaric environment in flange cavity to be measured, the middle part of flange cavity to be measured is provided with an electric heater unit, by dielectric heating in cavity to be measured for flange to assigned temperature, temperature, pressure transducer measure temperature, the pressure of medium in flange cavity to be measured.
The utility model utilizes pump or air compressor to provide hyperbaric environment for pipe flange connected system, utilizes electric heater unit to provide hot environment for pipe flange, can do the test in many group temperature and pressure situations; Can measure flange be connected to high-temperature and high-pressure conditions under slip, this covering device can not only check out whether leak, and can provide mass change or the volume change of medium; The utility model is applicable to liquid medium and gas medium.The utility model leak tested accuracy rate is high, all has stronger directive significance to scientific research and engineering.
Accompanying drawing explanation
Fig. 1 is the structural representation of this high-temperature pipe flange compactedness test macro.
In figure: 1-pump, 2-valve, the left pipeline of 3-, 4-flange, 5-bolt, 6-leak hunting cavity, 7-imported valve, 8-vent valve, 9-pad, 10-electric heater unit, 11-vent valve, 12-blind plate, 13-electric heater electricity cabinet, 14-blowdown valve, 15-underflow opening valve, 16-left support abutment, 17-temperature sensor, 18-pressure transducer, 19-temperature sensor, 20-pressure transducer, 21-computing machine, the right pipeline of 22-, 23-right support abutment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figure 1, a kind of high-temperature pipe flange compactedness test macro, it comprises left pipeline 3, right pipeline 22, and connect the flange 4 of left pipeline 3 and right pipeline 22, described flange 4 is fixed by bolt 5, and adopting pad 9 to seal, left pipeline 3, right pipeline 22, flange 4 form flange cavity to be measured, and described right pipeline 22 is provided with vent valve 11, blowdown valve 14;
Described left pipeline 3 is connected with pump 1 by valve 2, and described right pipeline 22 is welded to connect with blind plate 12; Be provided with in described flange cavity to be measured temperature sensor 19, pressure transducer 20, by electric heater electricity cabinet 13 control electric heater unit 10; Described electric heater electricity cabinet 13 can control the heating dynamics of electric heater unit 10; Described temperature sensor 19, pressure transducer 20 measure temperature, the pressure of medium in flange cavity to be measured;
Described flange 4 is outside equipped with flange leakage mechanism for testing, described flange leakage mechanism for testing comprises the cavity 6 that leaks hunting surrounded by the wall that leaks hunting, the described wall that leaks hunting is provided with imported valve 7, underflow opening valve 15, vent valve 8, be provided with temperature sensor 17, pressure transducer 18 in the described cavity that leaks hunting, described temperature sensor 17, pressure transducer 18 leak hunting temperature, the pressure of medium in cavity;
In order to ensure the accuracy measured, described left pipeline 3 is provided with left support abutment 16, and described right pipeline 22 is provided with right support abutment 23.
Described pump 1, for being transported in flange cavity to be measured by medium (liquid or gas), forms hyperbaric environment in flange cavity to be measured, and the pipeline of flange cavity to be measured is provided with vent valve 11, for exhaust when being filled with medium in flange cavity to be measured; Described electric heater 10 is for rising to a certain temperature by medium temperature, and electric heater 10 controls by electric heater electricity cabinet 13.Temperature sensor 19 and pressure transducer 20 is provided with, temperature, the pressure of Real-Time Monitoring flange cavity medium to be measured in flange cavity to be measured.Blind plate 12 is welded on right pipeline 22 end, its good sealing effect, and electric heater unit 10 is installed and ensured good seal.
Outside flange 4, be arranged with the cavity 6 that leaks hunting, the pressure of cavity 6 medium of leaking hunting can be affected after leaking out during medium is by flange cavity to be measured, thus reflect mass change or the volume change of cavity 6 medium of leaking hunting; Be provided with temperature sensor 17 and pressure transducer 18 in the described cavity 6 that leaks hunting, the temperature and pressure of cavity 6 medium of leaking hunting can be measured; The described cavity 6 that leaks hunting is provided with imported valve 7, underflow opening valve 15, vent valve 8, and imported valve 7 is for being filled with medium, and when being filled with medium and being liquid medium, vent valve 8 can be vented, and underflow opening valve 15 to leak hunting cavity medium for pressure release or eliminating; The volume of cavity of leaking hunting can utilize imported valve 7, underflow opening valve 15, vent valve 8 to be measured the volume of the cavity that leaks hunting by drainage.
Signal can be delivered in computing machine 21 and show by temperature sensor 17, pressure transducer 18, temperature sensor 19 and pressure transducer 20, also can be delivered in single-chip microcomputer and show.
Work process of the present utility model:
(1) before the work of high-temperature pipe flange compactedness test macro, computing machine 21 is started shooting stand-by, check valve 2, imported valve 7, vent valve 8, blowdown valve 14, underflow opening valve 15 on off state.If medium is liquid in flange cavity to be measured, is then filled with identical testing liquid under original state in the cavity 6 that leaks hunting, and records initial working temperature and pressure; If be gaseous medium in flange cavity to be measured, be then filled with identical gas to be measured under original state in the cavity 6 that leaks hunting, and record initial working temperature and pressure;
(2), during the work of high-temperature pipe flange compactedness test macro, medium is filled with flange cavity to be measured by pump 1, shows flange empty cavity pressure to be measured, pressure is adjusted to testing pressure by pressure transducer 20; Open electric heater unit 10, show flange empty cavity temperature to be measured by means of temperature sensor 19, medium temperature is adjusted to and treats testing temperature, under this worst hot case, the pressurize sufficiently long time, by computing machine 21, leakage is measured in real time.
Under worst hot case (temperature and pressure to be measured), the pressurize sufficiently long time, leak hunting data that the temperature sensor 17 of cavity 6 and pressure transducer 18 record if do not met the temperature volume Changing Pattern of equation of gaseous state or liquid, if namely flange cavity pressure sensor 20 to be measured registration diminishes in the process, pressure transducer 18 registration of leaking hunting in cavity 6 becomes large, then can judge to leak.When judging flange leakage to be measured, calculating slip can be carried out as follows.
Particularly, slip can pass through following formulae discovery:
When leaking medium is gas, the gaseous mass of leaking hunting in cavity is:
m 1 = M P 1 V RT 1 - - - ( 1 )
At the end of leaking hunting:
m 2 = M P 2 V RT 2 - - - ( 2 )
Wherein: the volume of the cavity that leaks hunting is V, and in measuring intervals of TIME t, the pressure and temperature leaked hunting in cavity is by p 1, T 1become p 2, T 2, M is medium molecule quality, and R is gaseous state constant, m 1for initial state quality, m 2for final states quality.
Gaseous mass change in time interval t is as follows:
Δm = m 2 - m 1 = M ( P 2 V RT 2 - P 1 V RT 1 ) - - - ( 3 )
Wherein Δ m is of poor quality.
The volumetric leak rate of the gas leaked is:
L = ΔV t = 1 t Δm M RT 2 p 2 - - - ( 4 )
Wherein Δ V is volume differences, and L is volume change.
Can directly calculate with formula (4) if medium is liquid.
Here be adopt volume change to represent slip, mass change can certainly be adopted to represent slip, and namely Δ m/t, repeats no more here.
The utility model can not only check out whether flange leaks, and the data by testing draw mass change or the volume change of medium.

Claims (3)

1. a high-temperature pipe flange compactedness test macro, it comprises left pipeline, right pipeline, and connects the flange of left pipeline and right pipeline, and described flange adopts pad to seal, and left pipeline, right pipeline, flange form flange cavity to be measured, it is characterized in that:
Described left pipeline is connected with pump by valve, and described right pipeline is connected with blind plate; Be provided with in described flange cavity to be measured temperature sensor, pressure transducer, by electric heater electricity cabinet control electric heater unit;
Described flange is outside equipped with flange leakage mechanism for testing, described flange leakage mechanism for testing comprises the cavity that leaks hunting surrounded by the wall that leaks hunting, the described wall that leaks hunting is provided with imported valve, underflow opening valve, vent valve, described in leak hunting in cavity and be provided with temperature sensor, pressure transducer;
Described right pipeline is provided with vent valve, blowdown valve.
2. high-temperature pipe flange compactedness test macro as claimed in claim 1, it is characterized in that: described left pipeline is provided with left support abutment, described right pipeline is provided with right support abutment.
3. high-temperature pipe flange compactedness test macro as claimed in claim 1, is characterized in that: described electric heater unit is placed in the middle part of flange cavity to be measured.
CN201420732779.1U 2014-11-28 2014-11-28 High-temperature pipe flange compactedness test macro Expired - Fee Related CN204314032U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420732779.1U CN204314032U (en) 2014-11-28 2014-11-28 High-temperature pipe flange compactedness test macro

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Application Number Priority Date Filing Date Title
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CN204314032U true CN204314032U (en) 2015-05-06

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105004493A (en) * 2015-07-17 2015-10-28 武汉工程大学 Leakage-detecting device for bolted flange connection system
CN105181267A (en) * 2015-07-17 2015-12-23 武汉工程大学 Device for testing leakage rate of bolted flange connection system
CN105699023A (en) * 2016-01-19 2016-06-22 中石化石油工程设计有限公司 Measuring device and method suitable for carbon dioxide pipeline exhaust and leakage test
CN105869689A (en) * 2016-06-21 2016-08-17 苏州科技大学 Device and method for measuring micro leakage rate of valve
CN106764458A (en) * 2016-12-28 2017-05-31 核动力运行研究所 Flange leakage monitoring device and high energy pipe network flange leakage monitoring regulator control system
CN110131582A (en) * 2019-05-30 2019-08-16 北京亿华通科技股份有限公司 A kind of hydrogen storage cylinder degradation detecting method of fuel cell hydrogen system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105004493A (en) * 2015-07-17 2015-10-28 武汉工程大学 Leakage-detecting device for bolted flange connection system
CN105181267A (en) * 2015-07-17 2015-12-23 武汉工程大学 Device for testing leakage rate of bolted flange connection system
CN105181267B (en) * 2015-07-17 2018-06-08 武汉工程大学 For testing the device of Bolted Flanged Connection system leak rate
CN105699023A (en) * 2016-01-19 2016-06-22 中石化石油工程设计有限公司 Measuring device and method suitable for carbon dioxide pipeline exhaust and leakage test
CN105699023B (en) * 2016-01-19 2018-11-13 中石化石油工程设计有限公司 Measuring device and measurement method suitable for carbon dioxide conduit emptying and leak-testing
CN105869689A (en) * 2016-06-21 2016-08-17 苏州科技大学 Device and method for measuring micro leakage rate of valve
CN105869689B (en) * 2016-06-21 2017-11-17 苏州科技大学 A kind of device and method for measuring valve tiny leakage rate
CN106764458A (en) * 2016-12-28 2017-05-31 核动力运行研究所 Flange leakage monitoring device and high energy pipe network flange leakage monitoring regulator control system
CN110131582A (en) * 2019-05-30 2019-08-16 北京亿华通科技股份有限公司 A kind of hydrogen storage cylinder degradation detecting method of fuel cell hydrogen system

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20150506

Termination date: 20161128