CN102937521A - Torsion and bending resistance testing method for valves - Google Patents
Torsion and bending resistance testing method for valves Download PDFInfo
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- CN102937521A CN102937521A CN2012104708551A CN201210470855A CN102937521A CN 102937521 A CN102937521 A CN 102937521A CN 2012104708551 A CN2012104708551 A CN 2012104708551A CN 201210470855 A CN201210470855 A CN 201210470855A CN 102937521 A CN102937521 A CN 102937521A
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Abstract
The invention relates to a torsion and bending resistance testing method for valves. The torsion and bending resistance testing method includes a valve torsion resistance safety performance testing process and a valve bending resistance safety performance testing process. A digital closed-loop control system is utilized, a servo drive force is output and loaded on a valve, and is fed back through a sensor, feedback signals are current feedback signals and sent into a regulator after being compared with a personal set values, and output control instruction is controlled and regulated by the regulator, sent to a servo control system, and finally the valve to be tested is tested according to the value set by test staff stably, so that precision and stability in test are improved greatly. Test results can be accurate in the torsion and bending resistance safety performance test processes by the torsion and bending resistance testing method.
Description
Technical field
The present invention relates to antitorque, the curved test method of a kind of valve.
Background technology
Valve is the large pressure pipeline element of a kind of demand, is widely used in the occasions such as all kinds of oil, natural gas extraction, for stable, carry and control the important effect of having brought into play.In recent years valve industry development is very fast, but valve mass guarantees also usually to be neglected by the people, and the security accident that causes causing occurs again and again.The according to statistics annual great industrial accident that causes in the world, wherein 1/3 is because the valve mass accident causes.Therefore in order further to improve valve products quality level, should be rigid in checking up in the valve mass check, comprise Shell test, leakage test, durability test etc. in the valve examination project at present, by the analysis of experiments of various performance parameters, the designing technique parameter of valve and the performance evaluation of actual condition occasion there is the guidance and help effect.
Yet on actual pressure pipeline operating mode: 1, valve, pipeline, medium hang the deadweight that loads; 2, mobile impact and the vibrations that bring of interior media; 3, two end flanges setting angle deviations dislocation; 4, valve and line size error gap; 5, the variation of system temperature fluctuation is expanded with heat and contract with cold; 6, thermal treatment internal stress; 7, the factor such as switching motion is so that valve element is bearing certain torsional forces and bending moment force.The stress of this inner static load can cause that valve housing produces distortion, even surpasses interior media to the bearing pressure of housing, and there is tremendous influence in the one-piece construction of valve.And a lot of valve manufacturing planies are in the components designing such as housing wall thickness, housing reinforcement and fastening bolt of valve, usually only single consideration valve internal medium on the impact of shell structure, often neglect the moment of torsion and the bending load that valve are applied at actual condition peripheral pipeline, the additional margin design of these stress not design is entered, and exists very large potential safety hazard.And some safe performance indexes all is the requirement of only determining security performance by general computing formula, not having effective process of the test analyzes, valve enterprise is for the structural design of valve like this, can only stop on the theoretical Calculating Foundation, and different valve mechanism types all applies mechanically unified computing formula, and comparing with actual applying working condition has certain aberrations in property.
In the actual pressure pipeline operating mode there be valve institute holding capacity failure mode: interior media pressure, torque load and bending load.It is a lot of that the valve internal pressure medium is tested method standard both domestic and external, such as API598, JB/T9092-1999 etc., the valve torque resistant, the bending resistance square tests correlative study both domestic and external and test method standard is introduced less, only has GB/T 8464-2008 " iron and copper be threaded valve ", CJ/T180-2003 " Domestic hand burnt gas valve " standard has been mentioned about the requirement to the valve security performance of valve external torque power and bending moment force load, but the test concrete scheme is more general, such as the accuracy requirement that does not have clear and definite test apparatus, test load applies the rate request of power value.Valve enterprise carries out the general dial torque wrench that adopts of valve torque resistant test and carries out, in the artificial operating process, the time that power value guarantor is carried is not easy accurate assurance, and because artificial operation, very difficult assurance applies the homogeneity of power value, process of the test is more loaded down with trivial details, loading and unloading more complicated, therefore usually a lot of enterprises neglect torque resistant tests; The test of bending resistance square is the general method of hanging counterweight that adopts, this method hangs from above in the process counterweight, the time of hanging from above is far longer than the process of test, and the center of gravity of the simulation pipeline of the valve other end itself is not easy accurate Calculation, easily the judgement of test findings exerted an influence, the semi-girder of counterweight end is easily along with little distortion of valve, produce sagging, therefore change has also occured in the vertical arm of force by the valve central point, moment of flexure also diminishes thereupon, and Measurement sensibility and accuracy do not reach testing requirements.
Summary of the invention
Technical matters to be solved by this invention provides antitorque, the curved test method of valve of a kind of precision height, good stability.
For solving the problems of the technologies described above, the present invention is by the following technical solutions: a kind of valve is antitorque, curved test method, comprise the antitorque safety feature test process of valve and valve bending resistance safety feature test process, wherein the antitorque safety feature test process of valve may further comprise the steps: a. is installed in the antitorque sample of valve between the simulation pipeline and bearing seat that is provided with two guide rail structures, b. by coaxial mounted spring coupling, speed reduction unit and servomotor apply torsion to the antitorque sample of valve, c. by coaxial mounted dynamic torque sensor feedback torque value, d. adopt the Digitized Closed Loop control system to test, be about to the feedback torque value and relatively enter regulator with the personnel setting value, steering order by regulator control and adjustment output, and output valve is conveyed to servomotor, the setting value that finally makes the test valve be stabilized in testing crew is tested; Wherein valve bending resistance safety feature test process may further comprise the steps: e. is installed in the valve bending test specimen and can regulates between cantilever shalving and the simulation pipeline, f. adopt the parallelogram Loading Method to apply pulling force to the valve bending test specimen by servo drive system, g. by with can regulate the vertically arranged power value of cantilever shalving sensor feedback power value signal, guarantee that valve bending test specimen suffered moment of flexure when testing equals the feedback force of power value sensor * can regulate the arm of force length of cantilever shalving all the time, h. adopt the Digitized Closed Loop control system to test, be about to the feedback force value and relatively enter regulator with the personnel setting value, steering order by regulator control and adjustment output, and output valve is conveyed to servo drive system, the setting value that finally makes the test valve be stabilized in testing crew is tested.
Valve of the present invention is antitorque, the beneficial effect of curved test method is: because the antitorque safety feature test process of valve and valve bending resistance safety feature test process all adopt the Digitized Closed Loop control system, the output of servo driving power loads on the valve, feed back through sensor, feedback signal adopts current feedback signal, relatively enter regulator with the personnel setting value, steering order by regulator control and adjustment output, be conveyed to servo-control system, the setting value that finally makes the test valve be stabilized in testing crew is tested, thereby greatly improves the precision and stability of test; Wherein the antitorque safety feature test process of valve adopts coaxial mounting structure, so that linking to each other with the dynamic torque sensor central shaft, speed reduction unit can carry out smoothly the transmission of rotational energy, solve the different axle problems such as causing disalignment that links to each other, and the torque value of valve sample can induce from dynamic torque sensor directly; Wherein valve bending resistance safety feature test process adopts brand-new structural design, moment induction side adopts can regulate the cantilever shalving support scheme, realizable force value sensor with can regulate cantilever shalving and remain vertical, and can regulate the certain rigidity of cantilever erection meter maintenance, guarantee before test and test after gone out by the pet valve moment of flexure is sensed more accurately, by the moment M=F of test valve * L, and can regulate the deadweight of cantilever shalving and valve before the test and can carry out clear operation by resetting of power value sensor, so that test findings is more accurate, the driving force that applies on the endpiece simulation pipeline adopts the parallelogram Loading Method, in the loading procedure of assurance power, the direction of power is downward all the time.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the antitorque safety feature test process of valve synoptic diagram in antitorque, the curved test method of valve of the present invention.
Fig. 2 is valve bending resistance safety feature test process synoptic diagram in antitorque, the curved test method of valve of the present invention.
Fig. 3 is Digitized Closed Loop control system schematic diagram in antitorque, the curved test method of valve of the present invention.
Embodiment
Valve of the present invention is antitorque, the antitorque safety feature test process of the valve of curved test method may further comprise the steps; A. the antitorque sample of valve is installed between the simulation pipeline and bearing seat that is provided with two guide rail structures, b. by coaxial mounted spring coupling, speed reduction unit and servomotor apply torsion to the antitorque sample of valve, c. by coaxial mounted dynamic torque sensor feedback torque value, d. adopt the Digitized Closed Loop control system to test, be about to the feedback torque value and relatively enter regulator with the personnel setting value, steering order by regulator control and adjustment output, and output valve is conveyed to servomotor, the setting value that finally makes the test valve be stabilized in testing crew is tested.As shown in Figure 1, so-called two guide rail structure is two rail plates 14 that are arranged in parallel before and after rail plate comprises, antitorque simulation pipeline 16 is provided with two sliding sleeves 15 that cooperate with two rail plates 14 respectively, one end of antitorque simulation pipeline 16 is slidably mounted on the rail plate 14 by sliding sleeve 15, two guide rail structures have limited rotation in the horizontal direction, vertically can slide along central shaft, so that in the twist process, being screwed into of the distortion of valve and screw thread, system axial shortens apart from meeting, the simulation pipeline of endpiece can be free to slide, thus more convenient operation.As shown in Figure 1, so-called coaxial installation is bearing seat 18, dynamic torque sensor 19, spring coupling 20, speed reduction unit 21 and servomotor 22 are installed on the same axle successively, because spring coupling 20 is installed between speed reduction unit 21 and the dynamic torque sensor 19, so that linking to each other with dynamic torque sensor 19 central shafts, speed reduction unit 21 can carry out smoothly the transmission of rotational energy, solve the different axle problems such as causing disalignment that links to each other, because dynamic torque sensor 19 adopts hard the connection with being connected of bearing seat 18, the torque value of valve sample 17 can directly induce from dynamic torque sensor.
Valve of the present invention is antitorque, the valve bending resistance safety feature test process of curved test method may further comprise the steps: e. is installed in the valve bending test specimen and can regulates between cantilever shalving and the simulation pipeline, f. adopt the parallelogram Loading Method to apply pulling force to the valve bending test specimen by servo drive system, g. by with can regulate the vertically arranged power value of cantilever shalving sensor feedback power value signal, h. adopt the Digitized Closed Loop control system to test, be about to the feedback force value and relatively enter regulator with the personnel setting value, steering order by regulator control and adjustment output, and output valve is conveyed to servo drive system, the setting value that finally makes the test valve be stabilized in testing crew is tested.As shown in Figure 2, the described rear and front end of regulating cantilever shalving 4 is fixed by cantilever shalving balance fulcrum 5 respectively, can regulate the left end and 3 vertical connections of power value sensor of cantilever shalving 4, guarantee that valve sample suffered moment of flexure when testing equals the feedback force of power value sensor 3 * can regulate the arm of force length of cantilever shalving 4 all the time, can regulate the right-hand member of cantilever shalving 4 and simulate mounted valve bending test specimen 7 between the pipeline 9, bending resistance simulation pipeline 9 is fixing by regulating ring 8, one end of pull bar 10 is connected with regulating ring 8, the other end of pull bar 10 and connecting rod 11 are connected to moving fulcrum 12, the other end of connecting rod 11 is fixing by pivot point 23, regulating ring 8, bending resistance simulation pipeline 9, pull bar 10, connecting rod 11, moving fulcrum 12 and pivot point 23 consist of jointed connecting rod mechanism, valve bending resistance style 7, regulating ring 8, moving fulcrum 12 and pivot point 23 consist of 4 points of parallelogram, moving fulcrum 12 is driven by servo drive system 13, power value sensor 3 links to each other with man-machine control interface 24 respectively with servo drive system 13, jointed connecting rod mechanism and servo drive system form the parallelogram Loading Method, owing to adopt the parallelogram Loading Method, in the loading procedure of assurance power, the direction of power is downward all the time.Described power value sensor 3 adopts spring 2 to support, the below of power value sensor 3 also is provided with steel chain 1, power value sensor 3 adopts spring 2 to support, simultaneously under spring 2 tensioned states, undertaken vertically spacing by steel chain 1, so that in the process that the power value applies, sensor can be responded in real time, thereby make test findings more accurate.
Described Digitized Closed Loop control system test as shown in Figure 3, input quantity and output valve compared by comparer enter controller, by the action of controller control actuator, load controlled device by actuator, by the sensor sensing output valve, thereby constantly adjust output valve, realize Digitized Closed Loop control, the setting value that finally makes the test valve be stabilized in testing crew is tested.
Claims (1)
1. a valve is antitorque, curved test method, it is characterized in that: comprise the antitorque safety feature test process of valve and valve bending resistance safety feature test process, wherein the antitorque safety feature test process of valve may further comprise the steps: a. is installed in the antitorque sample of valve between the simulation pipeline and bearing seat that is provided with two guide rail structures, b. by coaxial mounted spring coupling, speed reduction unit and servomotor apply torsion to the antitorque sample of valve, c. by coaxial mounted dynamic torque sensor feedback torque value, d. adopt the Digitized Closed Loop control system to test, be about to the feedback torque value and relatively enter regulator with the personnel setting value, steering order by regulator control and adjustment output, and output valve is conveyed to servomotor, the setting value that finally makes the test valve be stabilized in testing crew is tested; Wherein valve bending resistance safety feature test process may further comprise the steps: e. is installed in the valve bending test specimen and can regulates between cantilever shalving and the simulation pipeline, f. servo drive system adopts the parallelogram Loading Method to apply pulling force to the valve bending test specimen, g. by with can regulate the vertically arranged power value of cantilever shalving sensor feedback power value signal, guarantee that valve bending test specimen suffered moment of flexure when testing equals the feedback force of power value sensor * can regulate the arm of force length of cantilever shalving all the time, h. adopt the Digitized Closed Loop control system to test, be about to the feedback force value and relatively enter regulator with the personnel setting value, steering order by regulator control and adjustment output, and output valve is conveyed to servo drive system, the setting value that finally makes the test valve be stabilized in testing crew is tested.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210470855.1A CN102937521B (en) | 2012-11-20 | 2012-11-20 | Torsion and bending resistance testing method for valves |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210470855.1A CN102937521B (en) | 2012-11-20 | 2012-11-20 | Torsion and bending resistance testing method for valves |
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| CN102937521A true CN102937521A (en) | 2013-02-20 |
| CN102937521B CN102937521B (en) | 2014-12-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267620A (en) * | 2013-05-08 | 2013-08-28 | 西北工业大学 | Testing device for functional characteristic test of valve |
| CN103487195A (en) * | 2013-09-06 | 2014-01-01 | 北京宇航系统工程研究所 | Valve moment quantification determining method |
| CN104990699A (en) * | 2015-07-03 | 2015-10-21 | 武汉华威专用汽车检测有限责任公司 | Multi-functional test stand and bending and torsion test method of emergency cut-off valve |
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| CN201876349U (en) * | 2010-10-29 | 2011-06-22 | 苏州拓控机电设备有限公司 | Valve torque testing machine |
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2012
- 2012-11-20 CN CN201210470855.1A patent/CN102937521B/en not_active Expired - Fee Related
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267620A (en) * | 2013-05-08 | 2013-08-28 | 西北工业大学 | Testing device for functional characteristic test of valve |
| CN103487195A (en) * | 2013-09-06 | 2014-01-01 | 北京宇航系统工程研究所 | Valve moment quantification determining method |
| CN103487195B (en) * | 2013-09-06 | 2015-04-22 | 北京宇航系统工程研究所 | Valve moment quantification determining method |
| CN104990699A (en) * | 2015-07-03 | 2015-10-21 | 武汉华威专用汽车检测有限责任公司 | Multi-functional test stand and bending and torsion test method of emergency cut-off valve |
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| CN102937521B (en) | 2014-12-17 |
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