CN103471749A - Method for measuring looseness of valve assembling moment - Google Patents
Method for measuring looseness of valve assembling moment Download PDFInfo
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- CN103471749A CN103471749A CN2013103832236A CN201310383223A CN103471749A CN 103471749 A CN103471749 A CN 103471749A CN 2013103832236 A CN2013103832236 A CN 2013103832236A CN 201310383223 A CN201310383223 A CN 201310383223A CN 103471749 A CN103471749 A CN 103471749A
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Abstract
The invention relates to a method for measuring looseness of a valve assembling moment and belongs to the technical field of valve moment measurement. The method for measuring the looseness of the valve assembling moment comprises the following steps: calibrating a relationship between axial strain of a valve shell and an assembling moment, so as to obtain a calibration curve; carrying out long-time acquisition on the calibrated axial strain of the valve shell until a strain value is attenuated to a stable state, so as to obtain a strain curve; converting the strain curve into a moment curve by virtue of the strain curve. By adopting the method for measuring the looseness of the valve assembling moment, residual assembling moment of a product in a valve state can be effectively measured, accuracy is high, cost is low, and the method for measuring the looseness of the valve assembling moment is significant for researching looseness of the assembling moment and evaluating the effectiveness of a measure used for preventing a valve moment from being loose; an axial force of a spacer is guaranteed by virtue of a certain assembling moment when a valve is assembled, and further effective valve seal is guaranteed; after a valve is assembled and screwed up for the first time, the assembling moment has a loosening effect, static seal can be invalid, and measurement on a residual moment value needs to be carried out on an assembled valve for researching the looseness characteristic of the valve assembling moment.
Description
Technical field
The present invention relates to a kind of lax method of valve assembling moment of measuring, belong to valve moment field of measuring technique.
Background technology
Valve assembling moment directly has influence on pad place static seal pressure (pad bears axial force), after first assembling is tightened, assembling moment can relax in time and make static seal pressure reduce (axial force diminishes), thereby may cause not meeting the static seal specific pressure, static seal is lost efficacy.For guaranteeing that the valve static seal did not lose efficacy, must take effective means to prevent or reduce to assemble moment to relax.Therefore, need a kind of lax method of assembling moment of measuring, in order to interpretation valve residue assembling moment and the lax measure validity of the anti-moment of assessment valve.
Summary of the invention
The objective of the invention is in order to obtain valve assembling moment relaxation property, propose a kind of lax method of valve assembling moment of measuring, the method is to measure valve assembling moment relaxation property at the upper foil gauge that pastes of valve housing outside surface (the threaded outside surface of tool).
The objective of the invention is to be achieved through the following technical solutions.
A kind of lax method of valve assembling moment of measuring of the present invention, the method is to paste foil gauge to measure the relaxation property of valve assembling moment on the outside surface of valve housing, on described outside surface, external thread is arranged; Step is:
1) valve housing axial strain and assembling moment relation are demarcated, obtained calibration curve;
2) the valve housing axial strain of having demarcated is gathered for a long time, until strain value decays to steady state (SS), obtain strain curve;
3) calibration curve obtained by step 1), by step 2) strain curve that obtains is scaled M curve.
Beneficial effect
Measuring method of the present invention can effectively be measured the residue of product under valve state and assemble moment, and precision is high, with low cost, and research assembling moment is relaxed and assesses valve and prevent that the lax measure validity of moment is significant.Guarantee the pad axial force by certain assembling moment during the valve assembling, and then guarantee that valve seal is effective.After the first assembling of valve is tightened, assembling moment has relaxation effect, may cause static seal to lose efficacy, and is research valve assembling moment relaxation property, and the valve that need to complete assembling carries out the measurement of excess torque value.
The accompanying drawing explanation
Fig. 1 is valve outer seal configuration schematic diagram;
Fig. 2 is moment-strain calibration map;
M-strain curve figure when Fig. 3 is;
M-moment graph of relation when Fig. 4 is.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
As shown in Figure 1, the valve outer seal configuration is comprised of housing 1, pad 2, gland nut 3 and gland 4; Pad 2 is placed on the sealing surface place of housing 1, and compresses with gland 4, and gland nut 3 is arranged in the threaded mounting hole of housing 1, and gland nut 3 compresses gland 4;
Three foil gauges evenly are installed, for the measurement of strain on the outside surface of housing 1;
Steps of the method are:
1) gland nut 3 is applied to moment 20Nm, 40Nm, 60Nm, 80Nm and 100Nm successively, applied rear 3 strain values that simultaneously record at every turn, the strain of the housing 1 obtained and the moment relation curve of gland nut 3 are as shown in Figure 2;
2) calibration strain sheet is gathered for a long time, through the strain value of 24h back casing 1, decay to steady state (SS), the strain curve obtained as shown in Figure 3;
3) calibration curve obtained by step 1), by step 2) strain curve that obtains is scaled M curve, as shown in Figure 4.
Claims (1)
1. measure the lax method of valve assembling moment for one kind, it is characterized in that: the method is to paste foil gauge to measure the relaxation property of valve assembling moment on the outside surface of valve housing, on described outside surface, external thread is arranged; Step is:
1) valve housing axial strain and assembling moment relation are demarcated, obtained calibration curve;
2) the valve housing axial strain of having demarcated is gathered for a long time, until strain value decays to steady state (SS), obtain strain curve;
3) calibration curve obtained by step 1), by step 2) strain curve that obtains is scaled M curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310383223.6A CN103471749B (en) | 2013-08-29 | 2013-08-29 | A kind of method measured valve assembling moment and relax |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310383223.6A CN103471749B (en) | 2013-08-29 | 2013-08-29 | A kind of method measured valve assembling moment and relax |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103471749A true CN103471749A (en) | 2013-12-25 |
| CN103471749B CN103471749B (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310383223.6A Active CN103471749B (en) | 2013-08-29 | 2013-08-29 | A kind of method measured valve assembling moment and relax |
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| CN (1) | CN103471749B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019115A (en) * | 2014-06-13 | 2014-09-03 | 国家电网公司 | Polygonal strain resistor gasket |
| CN104879253A (en) * | 2015-04-11 | 2015-09-02 | 成都陵川特种工业有限责任公司 | Method for controlling torque attenuation of air intake manifolds of engines |
| CN114486034A (en) * | 2022-01-15 | 2022-05-13 | 重庆长安汽车股份有限公司 | Method for measuring valve seating force |
| CN115112361A (en) * | 2022-06-27 | 2022-09-27 | 扬州恒春电子有限公司 | Method and device for detecting falling of valve rod and valve plate of gate valve |
| CN115371882A (en) * | 2022-10-24 | 2022-11-22 | 中国航发四川燃气涡轮研究院 | Calibration mechanism for torque measuring device of high-power/high-rotating-speed transmission system |
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| EP1048943A2 (en) * | 1999-04-30 | 2000-11-02 | Horiba, Ltd. | Map preparing method used for engine testing apparatus or vehicle testing apparatus, and engine testing apparatus |
| CN200996879Y (en) * | 2006-10-08 | 2007-12-26 | 项美根 | Continuous tester of valve actuating torque |
| CN201021907Y (en) * | 2006-11-10 | 2008-02-13 | 南京财经大学 | Torque measurement device for valve executor |
| CN101852661A (en) * | 2009-03-31 | 2010-10-06 | 项美根 | Valve torque continuous test device and test method thereof |
| CN101871826A (en) * | 2009-04-22 | 2010-10-27 | 项晓明 | Continuous test device for torsion moment/bending moment of valve and test method thereof |
| CN201876333U (en) * | 2010-12-02 | 2011-06-22 | 核动力运行研究所 | Torque testing device of valve electric actuating mechanism |
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2013
- 2013-08-29 CN CN201310383223.6A patent/CN103471749B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1048943A2 (en) * | 1999-04-30 | 2000-11-02 | Horiba, Ltd. | Map preparing method used for engine testing apparatus or vehicle testing apparatus, and engine testing apparatus |
| CN200996879Y (en) * | 2006-10-08 | 2007-12-26 | 项美根 | Continuous tester of valve actuating torque |
| CN201021907Y (en) * | 2006-11-10 | 2008-02-13 | 南京财经大学 | Torque measurement device for valve executor |
| CN101852661A (en) * | 2009-03-31 | 2010-10-06 | 项美根 | Valve torque continuous test device and test method thereof |
| CN101871826A (en) * | 2009-04-22 | 2010-10-27 | 项晓明 | Continuous test device for torsion moment/bending moment of valve and test method thereof |
| CN201876333U (en) * | 2010-12-02 | 2011-06-22 | 核动力运行研究所 | Torque testing device of valve electric actuating mechanism |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019115A (en) * | 2014-06-13 | 2014-09-03 | 国家电网公司 | Polygonal strain resistor gasket |
| CN104019115B (en) * | 2014-06-13 | 2016-06-22 | 国家电网公司 | Polygon strain resistor pad |
| CN104879253A (en) * | 2015-04-11 | 2015-09-02 | 成都陵川特种工业有限责任公司 | Method for controlling torque attenuation of air intake manifolds of engines |
| CN114486034A (en) * | 2022-01-15 | 2022-05-13 | 重庆长安汽车股份有限公司 | Method for measuring valve seating force |
| CN115112361A (en) * | 2022-06-27 | 2022-09-27 | 扬州恒春电子有限公司 | Method and device for detecting falling of valve rod and valve plate of gate valve |
| CN115112361B (en) * | 2022-06-27 | 2023-08-08 | 扬州恒春电子有限公司 | Method and device for detecting falling-off of gate valve rod and valve plate |
| CN115371882A (en) * | 2022-10-24 | 2022-11-22 | 中国航发四川燃气涡轮研究院 | Calibration mechanism for torque measuring device of high-power/high-rotating-speed transmission system |
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|---|---|
| CN103471749B (en) | 2015-08-19 |
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