CN101368883A - Safety valve online calibration method - Google Patents
Safety valve online calibration method Download PDFInfo
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- CN101368883A CN101368883A CNA2008101966894A CN200810196689A CN101368883A CN 101368883 A CN101368883 A CN 101368883A CN A2008101966894 A CNA2008101966894 A CN A2008101966894A CN 200810196689 A CN200810196689 A CN 200810196689A CN 101368883 A CN101368883 A CN 101368883A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 60
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 238000012795 verification Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000002301 combined effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
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Abstract
本发明涉及一种安全阀的校验方法，具体地说是一种安全阀在线校验方法。所述方法包括安全阀、缸体和位移传感器，其特征是：缸体安装在安全阀的上部，在缸体内有可移动活塞杆，所述活塞杆与安全阀阀杆刚性连接；位移传感器用于检测安全阀阀杆或活塞或活塞杆的位移；开始校验时，把一定压力的流体经接管通入缸体内，缓缓地提高流体的压力，当压力升高到某个值时，在压力容器内的压力及活塞杆对安全阀阀杆产生的拉力的联合作用下，安全阀将开启；安全阀开启的过程中，安全阀阀杆将发生位移，该位移被位移传感器测出，并以位移传感器测得的位移量作为判断安全阀开启状态的判据。本发明能够在生产现场在线测得安全阀的整定压力、开启压力、回座压力，完成安全阀的校验。
The invention relates to a method for calibrating a safety valve, in particular to an online calibrating method for a safety valve. The method includes a safety valve, a cylinder body and a displacement sensor, and is characterized in that: the cylinder body is installed on the upper part of the safety valve, and there is a movable piston rod in the cylinder body, and the piston rod is rigidly connected with the valve stem of the safety valve; the displacement sensor It is used to detect the displacement of the safety valve stem or piston or piston rod; at the beginning of the calibration, a certain pressure of fluid is passed into the cylinder through the connecting pipe, and the pressure of the fluid is slowly increased. When the pressure rises to a certain value , under the combined effect of the pressure in the pressure vessel and the pulling force generated by the piston rod on the safety valve stem, the safety valve will open; during the opening process of the safety valve, the safety valve stem will be displaced, and the displacement is measured by the displacement sensor , and the displacement measured by the displacement sensor is used as the criterion for judging the opening state of the safety valve. The invention can measure the setting pressure, opening pressure and reseating pressure of the safety valve on-line at the production site, and complete the verification of the safety valve.
Description
Technical field
The present invention relates to a kind of method of calibration of safety valve, specifically a kind of on-line check method for safety valve.
Background technology
Existing safety valve on-line testing device operating process program is numerous and diverse, determines by listening whether safety valve is opened, and only can measure the set-pressure of safety valve, can't measure the opening pressure and the blow pressure of safety valve.
Summary of the invention
The objective of the invention is to seek a kind of safe, efficient, easy on-line check method for safety valve, online set-pressure, opening pressure and the blow pressure of measuring safety valve.
According to technical scheme provided by the invention, described safety valve and on-line testing method thereof comprise safety valve, cylinder body and displacement transducer, it is characterized in that: cylinder body is installed in the top of safety valve, piston mobile is arranged in cylinder body, piston rod is arranged on piston, and described piston rod and safety valve valve rod are rigidly connected; Displacement transducer is used to detect the displacement of safety valve valve rod or piston or piston rod;
During the beginning verification, the fluid of certain pressure is fed in the cylinder body through taking over, gently improve the pressure of fluid, when pressure is elevated to certain value, under the synergy to the pulling force of safety valve valve rod generation of pressure in pressure vessel and piston rod, safety valve will be opened; In the process that safety valve is opened, the safety valve valve rod will be subjected to displacement, and this displacement is measured by displacement transducer, and the displacement that records with displacement transducer is as the criterion of judging the safety valve opening.
On the top of safety valve the cylinder body bearing is set, described cylinder body is arranged on the cylinder body bearing, and when verification, the displacement of safety valve valve rod equates with the displacement of piston rod or piston.Upper end at cylinder body is provided with displacement sensor bracket, and described displacement transducer is installed on the displacement sensor bracket.On safety valve, be provided with and be used for first pressure unit and second pressure unit of the pressure in gaging pressure container and the cylinder body respectively.
After in fluid enters cylinder body, time point when safety valve valve rod or piston or piston rod generation initial displacement, the pressure that the pressure that first pressure unit records and second pressure unit record is exactly the set-pressure of this safety valve through the resulting pressure of conversion superposition;
The hydrodynamic pressure that enters in the cylinder body continues to raise, when making the displacement of safety valve valve rod or piston or piston rod reach the full open state of safety valve, the pressure that the pressure that first pressure unit records and second pressure unit record is through the conversion superposition, and resulting pressure is exactly the opening pressure of described safety valve;
After safety valve reaches the full open state, discharge the fluid in the cylinder body, the flap of safety valve will be got back on the valve seat, moment when zero-bit is got back in the displacement of safety valve valve rod or piston or piston rod, the pressure that the pressure that first pressure unit records and second pressure unit record is through the conversion superposition, and resulting pressure is exactly the blow pressure of this safety valve.
The present invention utilizes cylinder body that the valve rod of safety valve is applied pulling force, judges the opening of safety valve with the displacement of displacement sensor safety valve valve rod (cylinder piston rod or piston), by the shift value of safety valve valve rod (piston rod of cylinder body or piston), online set-pressure, opening pressure, the blow pressure that records safety valve that (do not influence production) in the production scene finished the verification of safety valve.Among the present invention one cover on-line check method for safety valve is accurate, easy, reliable, takes the course of its own.
Description of drawings
Fig. 1 is a safety valve on-line testing schematic diagram of the present invention.
Embodiment
Among the figure: 1, safety valve connecting pipe, 2, pressure vessel, 3, first pressure unit, 4, take over 5, safety valve, 6, cylinder body, 7, second pressure unit, 8, piston rod, 9, displacement transducer, 10, displacement sensor bracket, 11, safety valve valve rod, 12, cylinder body bearing, 13, flap, 14, valve seat.
Described on-line check method for safety valve comprises: safety valve, cylinder body (comprising hydraulic cylinder or cylinder) and displacement transducer, cylinder body 6 is fixed on the top of safety valve by cylinder body bearing 12, in cylinder body 6, piston mobile is arranged, piston rod 8 is arranged on piston, described piston rod 8 is rigidly connected with safety valve valve rod 11, the displacement of safety valve valve rod 11 equates with the displacement of piston rod 8 (or piston), displacement transducer 9 usefulness displacement sensor brackets 10 are fixed on the upper end of cylinder body 6, be used for measuring the displacement of piston rod 8 (or piston), because piston rod 8 and safety valve valve rod 11 are for being rigidly connected, so the displacement of safety valve valve rod 11 equates with the displacement of piston rod 8 (or piston), the pressure in first pressure unit 3 and second pressure unit, 7 difference gaging pressure containers 2 and the cylinder body 6.
During the on-line testing operation, at first shed the bonnet of safety valve 5, cylinder body 6 is fixed on the top of safety valve 5 by cylinder body bearing 12, piston rod 8 is rigidly connected with safety valve valve rod 11, with displacement sensor bracket 10 displacement transducer 9 is fixed on the upper end of cylinder body 6, links and take over 4 and first pressure unit 3, second pressure unit 7; Then, the liquid of certain pressure (or gas) is fed in the cylinder body 6 through taking over 4, gently improve the pressure of liquid (or gas), when pressure is elevated to certain value, under the synergy of the pulling force that 8 pairs of safety valve valve rods of pressure in pressure vessel 2 and piston rod 11 produce, safety valve 5 will be opened;
The displacement of 9 pairs of safety valve valve rods 11 of displacement transducer (displacement of cylinder piston rod or piston) situation detects: the time point that produces initial displacement when safety valve valve rod 11, the pressure that the pressure that first pressure unit 3 records and second pressure unit 7 record is through (conversion) superposition, and the pressure that obtains is exactly the set-pressure of this safety valve 5;
The pressure that enters the liquid (or gas) in the cylinder body 6 continues to raise, when making the displacement of safety valve valve rod 11 reach the full open state of safety valve 5, the pressure that the pressure that first pressure unit 3 records and second pressure unit 7 record is through (conversion) superposition, and resulting pressure is exactly the opening pressure of this safety valve 5;
After safety valve 5 reaches the full open state, discharge liquid or gas in the cylinder body 6, the flap 13 of safety valve 5 will be got back on the valve seat 14, when the moment of displacement (or displacement of cylinder piston bar or piston) when getting back to zero-bit of safety valve valve rod 11, the pressure that the pressure that first pressure unit 3 records and second pressure unit 7 record is through (conversion) superposition, and resulting pressure is exactly the blow pressure of this safety valve 5.
If the result who records in the said process (set-pressure of safety valve, opening pressure, blow pressure) conforms to (in the error tolerance band) with the value that safety valve 5 is demarcated then safety valve is qualified; Otherwise, then need safety valve 5 is adjusted, carry out above-mentioned verification operation process then again, till qualified.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101966894A CN101368883B (en) | 2008-09-16 | 2008-09-16 | On-line verification method of safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101966894A CN101368883B (en) | 2008-09-16 | 2008-09-16 | On-line verification method of safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101368883A true CN101368883A (en) | 2009-02-18 |
| CN101368883B CN101368883B (en) | 2010-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101966894A Expired - Fee Related CN101368883B (en) | 2008-09-16 | 2008-09-16 | On-line verification method of safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101368883B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829026A (en) * | 2012-08-07 | 2012-12-19 | 中联重科股份有限公司 | Overload protection control method, device and system and engineering machinery |
| CN103499439A (en) * | 2013-10-11 | 2014-01-08 | 深圳市特种设备安全检验研究院 | Safety valve online detector |
| CN104180032A (en) * | 2013-05-24 | 2014-12-03 | 华北电力大学 | Spring-safety-valve set-pressure-value applying device |
| CN106051240A (en) * | 2016-06-30 | 2016-10-26 | 江苏省特种设备安全监督检验研究院南通分院 | Safety valve as well as online detecting device and online detecting method of safety valve |
| CN106644213A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Nozzle baffle plate servo valve prestage hydraulic power test device and method |
| CN107219072A (en) * | 2017-07-11 | 2017-09-29 | 江南大学 | Safety valve online monitoring system |
| CN108760271A (en) * | 2018-06-19 | 2018-11-06 | 中国船舶重工集团公司第七〇九研究所 | A kind of the safety valve engaging pressure test device and method of simulation actual condition |
| CN110044603A (en) * | 2019-04-30 | 2019-07-23 | 深圳市特种设备安全检验研究院 | Safety valve checking method and testing device of safety valve |
| CN111610016A (en) * | 2020-06-23 | 2020-09-01 | 吴江市东吴机械有限责任公司 | Safety valve performance testing tool and method |
| CN113465910A (en) * | 2021-08-19 | 2021-10-01 | 西安热工研究院有限公司 | Safety door online checking system and method |
| US11480265B2 (en) | 2019-02-26 | 2022-10-25 | Hansen Technologies Corporation | Pressure relief valve and method of relief valve opening detection |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1014354B (en) * | 1987-11-10 | 1991-10-16 | 三菱重工业株式会社 | Safety valve working pressure test device |
| CN2054165U (en) * | 1989-06-28 | 1990-03-07 | 北京市燕山石油化工公司化工一厂 | On-line detector for safety valve |
| DE4315281C2 (en) * | 1993-05-07 | 1997-04-30 | Siemens Ag | Method and device for testing a spring-loaded safety valve |
| CN2493920Y (en) * | 2001-07-23 | 2002-05-29 | 郭俊杰 | Automatic check device for high/low pressure safety valve |
-
2008
- 2008-09-16 CN CN2008101966894A patent/CN101368883B/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829026A (en) * | 2012-08-07 | 2012-12-19 | 中联重科股份有限公司 | Overload protection control method, device and system and engineering machinery |
| CN102829026B (en) * | 2012-08-07 | 2014-11-12 | 中联重科股份有限公司 | Overload protection control method, device and system and engineering machinery |
| CN104180032A (en) * | 2013-05-24 | 2014-12-03 | 华北电力大学 | Spring-safety-valve set-pressure-value applying device |
| CN104180032B (en) * | 2013-05-24 | 2016-06-08 | 华北电力大学 | A kind of spring safety valve set-pressure value bringing device |
| CN103499439A (en) * | 2013-10-11 | 2014-01-08 | 深圳市特种设备安全检验研究院 | Safety valve online detector |
| CN106644213B (en) * | 2015-10-30 | 2019-02-26 | 北京精密机电控制设备研究所 | A hydraulic test device and method for the pre-stage of a nozzle flapper servo valve |
| CN106644213A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Nozzle baffle plate servo valve prestage hydraulic power test device and method |
| CN106051240B (en) * | 2016-06-30 | 2018-02-13 | 江苏省特种设备安全监督检验研究院南通分院 | Safety valve, the on-line measuring device of safety valve and online test method |
| CN106051240A (en) * | 2016-06-30 | 2016-10-26 | 江苏省特种设备安全监督检验研究院南通分院 | Safety valve as well as online detecting device and online detecting method of safety valve |
| CN107219072A (en) * | 2017-07-11 | 2017-09-29 | 江南大学 | Safety valve online monitoring system |
| CN108760271A (en) * | 2018-06-19 | 2018-11-06 | 中国船舶重工集团公司第七〇九研究所 | A kind of the safety valve engaging pressure test device and method of simulation actual condition |
| CN108760271B (en) * | 2018-06-19 | 2020-05-05 | 中国船舶重工集团公司第七一九研究所 | Safety valve opening and closing pressure testing device and method for simulating actual working conditions |
| US11480265B2 (en) | 2019-02-26 | 2022-10-25 | Hansen Technologies Corporation | Pressure relief valve and method of relief valve opening detection |
| CN110044603A (en) * | 2019-04-30 | 2019-07-23 | 深圳市特种设备安全检验研究院 | Safety valve checking method and testing device of safety valve |
| CN110044603B (en) * | 2019-04-30 | 2024-02-23 | 深圳市质量安全检验检测研究院 | Safety valve verification method and safety valve verification device |
| CN111610016A (en) * | 2020-06-23 | 2020-09-01 | 吴江市东吴机械有限责任公司 | Safety valve performance testing tool and method |
| CN113465910A (en) * | 2021-08-19 | 2021-10-01 | 西安热工研究院有限公司 | Safety door online checking system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101368883B (en) | 2010-06-16 |
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Granted publication date: 20100616 Termination date: 20100916 |