CN101368883B - On-line check method for safety valve - Google Patents
On-line check method for safety valve Download PDFInfo
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- CN101368883B CN101368883B CN2008101966894A CN200810196689A CN101368883B CN 101368883 B CN101368883 B CN 101368883B CN 2008101966894 A CN2008101966894 A CN 2008101966894A CN 200810196689 A CN200810196689 A CN 200810196689A CN 101368883 B CN101368883 B CN 101368883B
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- safety valve
- pressure
- displacement
- valve
- cylinder body
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Abstract
The invention relates to a safety valve checking method, in particular to an online checking method for a safety valve. The method comprises a safety valve, a cylinder block and a displacement sensor and is characterized in that the cylinder body is arranged at the upper part of the safety valve; a movable piston rod is arranged inside the cylinder body and rigidly connected with a valve rod of the safety valve; the displacement sensor is used to detect the displacement of the valve rod of the safety valve or the piston or the piston rod; when the checking starts, the fluid with certain pressure is injected into the cylinder body through a connecting pipe; the pressure of the fluid is slowly raised; when the pressure is increased to a certain value, the safety valve is opened under the combined effect of the pressure in a pressure vessel and the pulling force generated by the piston rod onto the valve rod of the safety valve; during the safety valve opening process, the valve rod of the safety valve is displaced, and the displacement is detected by the displacement sensor; and the displacement measured by the displacement sensor is taken as the criterion for judging the opening state of the safety valve. The invention can make online detection of the setting pressure, opening pressure and return pressure of the safety valve at the production field so as to complete the complete the safety valve checking.
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 (1)
1. on-line check method for safety valve, comprise safety valve (5), cylinder body (6) and displacement transducer (9), it is characterized in that: cylinder body (6) is installed in the top of safety valve (5), in cylinder body (6), piston mobile is arranged, piston rod (8) is arranged on piston, and described piston rod (8) is rigidly connected with safety valve valve rod (11); Displacement transducer (9) is used to detect the displacement of safety valve valve rod (11) or piston or piston rod (8);
During the beginning verification, the fluid of certain pressure is fed in the cylinder body (6) through taking over (4), 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 (11) generation of pressure in pressure vessel (2) and piston rod (8), safety valve (5) will be opened; In the process that safety valve (5) is opened, safety valve valve rod (11) will be subjected to displacement, and this displacement is measured by displacement transducer (9), and the displacement that records with displacement transducer (9) is as the criterion of judging safety valve (5) opening;
On the top of safety valve (5) cylinder body bearing (12) is set, described cylinder body (6) is arranged on the cylinder body bearing (12), and when verification, the displacement of safety valve valve rod (11) equates with the displacement of piston rod (8) or piston;
In the upper end of cylinder body (6) displacement sensor bracket (10) is set, described displacement transducer (9) is installed on the displacement sensor bracket (10);
On safety valve (5), be provided with and be used for first pressure unit (3) and second pressure unit (7) of the pressure in gaging pressure container (2) and the cylinder body (6) respectively;
After in fluid enters cylinder body (6), time point when safety valve valve rod (11) or piston or piston rod (8) generation initial displacement, the pressure that pressure that first pressure unit (3) records and second pressure unit (7) record is exactly the set-pressure of this safety valve (5) through the resulting pressure of conversion superposition;
The hydrodynamic pressure that enters in the cylinder body (6) continues to raise, when making the displacement of safety valve valve rod (11) or piston or piston rod (8) reach the full open state of safety valve (5), the pressure that pressure that first pressure unit (3) records and second pressure unit (7) record is through the conversion superposition, and resulting pressure is exactly the opening pressure of described safety valve (5);
After safety valve (5) reaches the full open state, discharge the fluid in the cylinder body (6), the flap (13) of safety valve (5) will be got back on the valve seat (14), moment when zero-bit is got back in the displacement of safety valve valve rod (11) or piston or piston rod (8), the pressure that pressure that first pressure unit (3) records and second pressure unit (7) record is through the conversion superposition, and resulting pressure is exactly the blow pressure of this safety valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101966894A CN101368883B (en) | 2008-09-16 | 2008-09-16 | On-line check method for safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101966894A CN101368883B (en) | 2008-09-16 | 2008-09-16 | On-line check method for safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101368883A CN101368883A (en) | 2009-02-18 |
| CN101368883B true 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 check method for safety valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN101368883B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 kind of nozzle-flapper servo valve prestage is surged force 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 |
| CN107219072A (en) * | 2017-07-11 | 2017-09-29 | 江南大学 | Safety valve online monitoring system |
| 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 |
| MX2021010165A (en) | 2019-02-26 | 2022-01-24 | Hansen Tech Llc | Pressure relief valve and method of relief valve opening detection. |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN1014354B (en) * | 1987-11-10 | 1991-10-16 | 三菱重工业株式会社 | Testing means for operation pressure of safety valve |
| US5499527A (en) * | 1993-05-07 | 1996-03-19 | Siemens Aktiengesellschaft | Method and apparatus 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
Patent Citations (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 | Testing means for operation pressure of safety valve |
| 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 |
| US5499527A (en) * | 1993-05-07 | 1996-03-19 | Siemens Aktiengesellschaft | Method and apparatus 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 |
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| Publication number | Publication date |
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| CN101368883A (en) | 2009-02-18 |
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Granted publication date: 20100616 Termination date: 20100916 |