CN101216128A - Security valve and its on-line calibration technology - Google Patents
Security valve and its on-line calibration technology Download PDFInfo
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- CN101216128A CN101216128A CNA2008100194800A CN200810019480A CN101216128A CN 101216128 A CN101216128 A CN 101216128A CN A2008100194800 A CNA2008100194800 A CN A2008100194800A CN 200810019480 A CN200810019480 A CN 200810019480A CN 101216128 A CN101216128 A CN 101216128A
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Abstract
The invention relates to a safety valve, more particularly a safety valve and an on-line check technique thereof. According to the technical proposal provided by the invention, the safety valve and on-line check technique thereof comprise a valve body and a valve rod. The invention is characterized in that the body of a cylinder is arranged on the top of the valve body; the piston rod of the cylinder is interconnected with the valve rod of the safety valve; a gas inlet and a gas outlet are arranged at two sides opposite to the piston on the valve body; when the pressure gas is introduced by the gas inlet of the valve body, the piston moves upwards with a travel equal to the opening travel of the safety valve; the effective bearing area of the cylinder piston is equal to that of the valve flap of the safety valve; and the effective bearing area of the cylinder piston is equal to the result of subtracting the cross-sectional area of the piston rod from the cross-sectional area of the piston. The invention can efficiently increase the check accuracy of safety valves.
Description
Technical field
The present invention relates to safety valve, refer in particular to a kind of safety valve and on-line testing technology thereof.
Background technique
Traditional safety valve is not taken into account the needs of on-line testing, this just makes the instrument of existing safety valve on-line testing very complicated, costs an arm and a leg, need hydraulic pressure installation that safety valve is applied pulling force, and the operating process program of on-line testing is numerous and diverse, judge by the exhaust sound of listening safety valve whether safety valve is opened, the actual cracking pressure of safety valve also needs a series of conversion just can draw.
Summary of the invention
The objective of the invention is to seek a kind of safety valve and on-line testing technology thereof, to improve the checking precision of safety valve.
According to technological scheme provided by the invention, described safety valve and on-line testing technology thereof comprise the valve body and the valve rod thereof of safety valve, it is characterized in that: the cylinder body that cylinder is arranged at the top of valve body, the piston rod of cylinder and the valve rod of safety valve interconnect, and the both sides with respect to piston on cylinder body are provided with intake interface and exhaust port; After the intake interface of cylinder body fed pressed gas, piston rod moved upward, and the stroke of piston rod equates with the opening travel of safety valve; Effective compression area of steam-cylinder piston equates with effective compression area of safety valve flap; The sectional area that effective compression area of steam-cylinder piston equals piston deducts the sectional area of piston rod.
Top at valve body is provided with strut, and cylinder body is fixed on the strut.Piston rod and valve rod utilize the flange-type link to interconnect.Balance port is set on cylinder body.The bonnet that is installed on the valve body top is arranged in the outside of cylinder.
There is valve seat lower end at valve body, valve pocket is arranged in valve seat, the outlet of safety valve is set on the wall of valve seat, bottom in valve body is fixed with guide holder, there is flap the below of guide holder, the directional post on flap top is positioned at the pilot hole of guide holder, and the directional post on flap top can slide up and down in pilot hole, the bottom surface of flap cooperates the valve port that forms safety valve with the upper-end surface of safety valve import, the lower end of valve rod is connected with flap, in valve body, spring lower seat is arranged above the guide holder, there is the spring seat of honour upper end in valve body, in the outside of valve rod, between the spring lower seat and the spring seat of honour spring is arranged.
The on-line testing technology of described safety valve is as follows: slowly open reduction valve earlier, pressed gas is entered in the cylinder body, steam-cylinder piston produces the trend that moves upward, and makes the valve rod of safety valve be subjected to a pulling force that makes progress by piston rod; In the process that reduction valve is slowly opened, the gas pressure that enters in the cylinder body also slowly raises thereupon, and the pulling force that the valve rod of safety valve is subjected to also further increases; When the gas pressure in the cylinder body is elevated to certain value, under the synergy of pressure in pressurized container and cylinder body, safety valve is opened to the pulling force of safety valve valve rod generation; The moment that safety valve is opened, the numerical value of first pressure transducer reduces rapidly, and the safety valve exhaust at this moment, is closed reduction valve immediately simultaneously, and the outlet valve of cylinder is opened automatically, and safety valve automatically resets; On the rapid time point that reduces of numerical value of first pressure transducer, the pressure data sum that first pressure transducer and second pressure transducer are write down is exactly the actual cracking pressure of safety valve;
If the actual cracking pressure of the safety valve that records in the said process is consistent with design pressure, then safety valve is qualified; Otherwise, then need safety valve is adjusted, carry out said process then again, measure the actual cracking pressure of safety valve, till qualified.
New-type safety valve among the present invention has changed the structure of conventional security valve, required force application component of safety valve on-line testing (cylinder) and safety valve are become one, utilize the pressure of pressurized container self to promote cylinder generation pulling force, a consequent cover safety valve on-line testing technology is easy, reliable, takes the course of its own.Required instrument is only for pressure sensor data record, printing instrument, and is with low cost; The variation of the numerical value by first pressure transducer is used as the criterion that safety valve is opened, and is objective and accurate; Two pressure data additions that pressure transducer write down directly drew the actual cracking pressure of safety valve when safety valve was opened.
Description of drawings
Fig. 1 is a safety valve of the present invention sketch as a result.
Fig. 2 is a safety valve on-line testing schematic diagram of the present invention.
Embodiment
Among the figure: 1, valve body, 2, link, 3, strut, 4, intake interface, 5, cylinder body, 6, balance port, 7, exhaust port, 8, piston rod, 9, valve rod, 10, bonnet, 11, the spring seat of honour, 12, spring, 13, spring lower seat, 14, valve port, 15, the outlet of safety valve, 16, the import of safety valve, 17, flap, 18, pressurized container, 19, first sensor, 20, reduction valve, 21, take over 22, second pressure transducer, 23, outlet valve.
Described safety valve and on-line testing technology thereof comprise the valve body and the valve rod thereof of safety valve, the cylinder body 5 that cylinder is arranged at the top of valve body 1, the piston rod 8 of cylinder interconnects with the valve rod 9 of safety valve, and the both sides with respect to piston on cylinder body 5 are provided with intake interface 4 and exhaust port 7; After the intake interface 4 of cylinder body 5 fed pressed gas, piston rod 8 moved upward, and the stroke of piston rod 8 equates with the opening travel of safety valve; Effective compression area of steam-cylinder piston equates with effective compression area of safety valve flap 17; The sectional area that effective compression area of steam-cylinder piston equals piston deducts the sectional area of piston rod.
At the top of valve body 1 strut 3 is set, cylinder body 5 is fixed on the strut 3, so that cylinder body 5 is fixed on the valve body 1.Piston rod 8 utilizes flange-type link 2 to interconnect with valve rod 9, and during connection, the flange that utilizes bolt will be positioned at piston rod 8 and valve rod 9 ends interconnects.Balance port 6 is set on cylinder body 5.In the outside of cylinder the bonnet 10 that is installed on valve body 1 top is arranged, when not carrying out on-line testing, utilize bonnet 10 that cylinder and strut 3 etc. is sealed in the inside.
There is valve seat lower end at valve body 1, valve pocket is arranged in valve seat, the outlet of safety valve is set on the wall of valve seat, bottom in valve body 1 is fixed with guide holder 14, there is flap 17 below of guide holder 14, the directional post on flap 17 tops is positioned at the pilot hole of guide holder 14, and the directional post on flap 17 tops can slide up and down in pilot hole, the bottom surface of flap 17 cooperates the valve port that forms safety valve with the upper-end surface of safety valve import 16, the lower end of valve rod 9 is connected with flap 17, in valve body 1, spring lower seat 13 is arranged above the guide holder 13, there is the spring seat of honour 11 upper end in valve body 1, in the outside of valve rod 9, there is spring 12 at 11 at the spring lower seat 13 and the spring seat of honour.
When carrying out on-line testing, unload the bonnet 10 of safety valve, on the exhaust port 7 of cylinder, connect outlet valve 23; The intake interface 4 of cylinder is with second pressure transducer 22 and take over 21 and be connected, and takes over an other end of 21 and connects the reduction valve 20 and first pressure transducer 19, is connected with the spare interface of pressurized container 18 at last; First pressure transducer 19, second pressure transducer 22 are exported, are printed instrument with data display and data and be connected.
During on-line testing operation beginning, at first slowly open reduction valve, at this moment, the gas of certain pressure enters in the cylinder body 5, and steam-cylinder piston produces the trend that moves upward, and makes the valve rod 9 of safety valve be subjected to a pulling force that makes progress by piston rod 8.In the process that reduction valve is slowly opened, the gas pressure that enters in the cylinder body 5 also slowly raises thereupon, and the pulling force that the valve rod 9 of safety valve is subjected to also further increases.When the gas pressure in the cylinder body 5 is elevated to certain value, under the synergy of the pulling force that 5 pairs of safety valve valve rods of pressure in pressurized container (thrust) and cylinder body 9 produce, safety valve will be opened.The moment that safety valve is opened, the numerical value of first pressure transducer 19 reduces rapidly, and safety valve produces very big exhaust sound simultaneously; At this moment, close reduction valve 20 immediately, cylinder discharge valve 23 is opened automatically, and safety valve automatically resets.On the rapid time point that reduces of numerical value (time point of safety valve unlatching just) of first pressure transducer 19, two pressure datas that pressure transducer write down (by instrument record, printing) sum is exactly the actual cracking pressure of safety valve.
If the actual cracking pressure of the safety valve that records in the said process consistent with design pressure (within the error allowed band), then safety valve is qualified; Otherwise, then need safety valve is adjusted, carry out said process then again, measure the actual cracking pressure of safety valve, till qualified.
Claims (7)
1. safety valve and on-line testing technology thereof, the valve body and the valve rod thereof that comprise safety valve, it is characterized in that: the cylinder body (5) that cylinder is arranged at the top of valve body (1), the piston rod of cylinder (8) interconnects with the valve rod (9) of safety valve, and the both sides of going up with respect to piston at cylinder body (5) are provided with intake interface (4) and exhaust port (7); After the intake interface (4) of cylinder body (5) fed pressed gas, piston rod (8) moved upward, and the stroke of piston rod (8) equates with the opening travel of safety valve; Effective compression area of steam-cylinder piston equates with effective compression area of safety valve flap (17); The sectional area that effective compression area of steam-cylinder piston equals piston deducts the sectional area of piston rod.
2. safety valve as claimed in claim 1 and on-line testing technology thereof is characterized in that: at the top of valve body (1) strut (3) is set, cylinder body (5) is fixed on the strut (3).
3. safety valve as claimed in claim 1 and on-line testing technology thereof is characterized in that: piston rod (8) utilizes flange-type link (2) to interconnect with valve rod (9).
4. safety valve as claimed in claim 1 and on-line testing technology thereof is characterized in that: balance port (6) is set on cylinder body (5).
5. safety valve as claimed in claim 1 and on-line testing technology thereof is characterized in that: the bonnet (10) that is installed on valve body (1) top is arranged in the outside of cylinder.
6. safety valve as claimed in claim 1 and on-line testing technology thereof, it is characterized in that: there is valve seat the lower end at valve body (1), valve pocket is arranged in valve seat, the outlet of safety valve is set on the wall of valve seat, bottom in valve body (1) is fixed with guide holder (14), there is flap (17) below of guide holder (14), the directional post on flap (17) top is positioned at the pilot hole of guide holder (14), and the directional post on flap (17) top can slide up and down in pilot hole, the bottom surface of flap (17) cooperates the valve port that forms safety valve with the upper-end surface of safety valve import (16), the lower end of valve rod (9) is connected with flap (17), in valve body (1), spring lower seat (13) is arranged above the guide holder (13), there are the spring seat of honour (11), the outside in valve rod (9) in upper end in valve body (1), between spring lower seat (13) and the spring seat of honour (11) spring (12) is arranged.
7. the on-line testing technology of a safety valve, it is characterized in that: slowly open earlier reduction valve (20), pressed gas is entered in the cylinder body (5), and steam-cylinder piston produces the trend that moves upward, and makes the valve rod (9) of safety valve be subjected to a pulling force that makes progress by piston rod (8); In the process that reduction valve (20) is slowly opened, the gas pressure that enters in the cylinder body (5) also slowly raises thereupon, and the pulling force that the valve rod of safety valve (9) is subjected to also further increases; When the gas pressure in the cylinder body (5) is elevated to certain value, under pressure in pressurized container and cylinder body (5) the synergy, safety valve is opened to the pulling force of safety valve valve rod (9) generation; The moment that safety valve is opened, the numerical value of first pressure transducer (19) reduces rapidly, and the safety valve exhaust at this moment, is closed reduction valve (20) immediately simultaneously, and the outlet valve of cylinder (23) is opened automatically, and safety valve automatically resets; On the rapid time point that reduces of numerical value of first pressure transducer (19), first pressure transducer (19) and the pressure data sum that second pressure transducer (22) is write down are exactly the actual cracking pressure of safety valve; If the actual cracking pressure of the safety valve that records in the said process is consistent with design pressure, then safety valve is qualified; Otherwise, then need safety valve is adjusted, carry out said process then again, measure the actual cracking pressure of safety valve, till qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100194800A CN101216128A (en) | 2008-01-16 | 2008-01-16 | Security valve and its on-line calibration technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100194800A CN101216128A (en) | 2008-01-16 | 2008-01-16 | Security valve and its on-line calibration technology |
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| Publication Number | Publication Date |
|---|---|
| CN101216128A true CN101216128A (en) | 2008-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100194800A Pending CN101216128A (en) | 2008-01-16 | 2008-01-16 | Security valve and its on-line calibration technology |
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| CN (1) | CN101216128A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095006A (en) * | 2010-12-29 | 2011-06-15 | 江村 | Sealing type safety valve with bell jar valve clack of pressure bearing rod |
| CN103076134A (en) * | 2012-12-31 | 2013-05-01 | 苏州维赛克阀门检测技术有限公司 | On-line detection system for safety valve |
| CN103727277A (en) * | 2012-10-10 | 2014-04-16 | 成都掌握移动信息技术有限公司 | High-air-tightness spring safety valve |
| CN103727276A (en) * | 2012-10-10 | 2014-04-16 | 成都掌握移动信息技术有限公司 | High-seal air compressor safety valve |
| CN113653840A (en) * | 2021-07-27 | 2021-11-16 | 上海空间推进研究所 | Automatic auxiliary debugging device for pressure reducing valve, operation method and pressure reducing valve device |
| WO2024032240A1 (en) * | 2022-08-12 | 2024-02-15 | 上海电子信息职业技术学院 | Double-safety intelligent safety valve |
-
2008
- 2008-01-16 CN CNA2008100194800A patent/CN101216128A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095006A (en) * | 2010-12-29 | 2011-06-15 | 江村 | Sealing type safety valve with bell jar valve clack of pressure bearing rod |
| CN102095006B (en) * | 2010-12-29 | 2012-07-25 | 江村 | Sealing type safety valve with bell jar valve clack of pressure bearing rod |
| CN103727277A (en) * | 2012-10-10 | 2014-04-16 | 成都掌握移动信息技术有限公司 | High-air-tightness spring safety valve |
| CN103727276A (en) * | 2012-10-10 | 2014-04-16 | 成都掌握移动信息技术有限公司 | High-seal air compressor safety valve |
| CN103076134A (en) * | 2012-12-31 | 2013-05-01 | 苏州维赛克阀门检测技术有限公司 | On-line detection system for safety valve |
| CN113653840A (en) * | 2021-07-27 | 2021-11-16 | 上海空间推进研究所 | Automatic auxiliary debugging device for pressure reducing valve, operation method and pressure reducing valve device |
| CN113653840B (en) * | 2021-07-27 | 2023-09-26 | 上海空间推进研究所 | Automatic auxiliary debugging device for pressure reducing valve, operation method and pressure reducing valve device |
| WO2024032240A1 (en) * | 2022-08-12 | 2024-02-15 | 上海电子信息职业技术学院 | Double-safety intelligent safety valve |
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Open date: 20080709 |