CN2650091Y - Constant pressure self-controlled multi-type sealed head edge stress automatic measurement and experiment device - Google Patents
Constant pressure self-controlled multi-type sealed head edge stress automatic measurement and experiment device Download PDFInfo
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- CN2650091Y CN2650091Y CN 03226762 CN03226762U CN2650091Y CN 2650091 Y CN2650091 Y CN 2650091Y CN 03226762 CN03226762 CN 03226762 CN 03226762 U CN03226762 U CN 03226762U CN 2650091 Y CN2650091 Y CN 2650091Y
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- end socket
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
An automatic test experiment set for margin stress of constant-pressure self-control multiple-type heads is provided, which is mainly used for solving the problem of no available pressure automatic test experiment device, etc. The utility model has the technical scheme that: the experiment set comprises a flat head, a taper head, a spherical head and an ellipse head fixed on a stand, and consists of a platform pressure control system, a hydraulic control system and a data collection system, the heads are respectively equipped with head pressure gauges, and a pressure sensor formed by an exhaust pipe connected with the control platform, after passing through an oil pump and a commutating solenoid valve, the oil path communicated with an oil tank is respectively communicated with the oil cavity in the head. The utility model is able to fulfill the testing, pressurizing, holding and unloading commutation for specifying the rim stress distribution law of head transition section under any pressure, and has simple operation, high commutation speed, no impact and hysteresis, with stable test pressure in the head, the test data can be recorded, and can also be directly displayed and printed out with the computer, all operations can be fulfilled on the control board.
Description
Affiliated technical field
The utility model relates to a kind of stress test experimental provision, especially a kind of experimental provision that can carry out the automatic test of constant voltage automatic control polymorphic type end socket edge stress.
Background technology
End socket is a main parts size on the pressure vessel, and end socket and cylindrical shell be by being weldingly connected, thereby constitutes the container that can bear pressure of a sealing.According to different needs, can produce difform end socket.But because the singularity of end enclosure structure, the complicacy of the part stress distribution that particularly links to each other with cylindrical shell makes in actual production process, mainly uses standard elliptical head, dome head, conical head (transition section), flat-plate closure and dished (torispherical) head.For being engaged in design of pressure vessels, make, process equipment and the control engineering Major or the engineering technical personnel of maintenance and management, must to different end socket types link to each other with cylindrical shell the part stress distribution law understand and grasp, constant voltage automatic control polymorphic type end socket edge stress automatic experimental apparatus for testing just is being based on this purpose and is developing and develop, its main application is to test to student or engineering technical personnel, by this experiment, make the student understand and grasp the regularity of distribution of end socket edge stress on the one hand, also make the student grasp the ways and means of stress test on the other hand.
At present, such experimental provision but all develop voluntarily by school, and be very easy, therefore all do not apply for a patent.Its structure can have two types, a kind of is to burn-on at an end of cylindrical shell that to need the end socket of test, another kind be the dissimilar end sockets of two needs tests of burn-oning at the cylindrical shell two ends, and the process of its pressurization can adopt manually, also can adopt motor-drivenly, its pressure all is to determine by the value of seeing manometer.The consequence of doing like this is: 1, because in pressure process, the percussive action of pump makes finally stabilised force value be less than the force value of user when stopping to pressurize, and force value can not reach the desired set-point of user; 2, Ce Shi force value can not be given arbitrarily.Simultaneously, the pressurize of pressure vessel and uninstall process all are to adopt the method for artificial valve-off to carry out, in being pressurized to the process of pressurize, because the hysteresis quality of valve-off makes force value to descend once more again.Thereby make the student in test process, force value is a variable, and it is bigger that resulting result and result of calculation may differ, thereby has lost the preciseness of science detection and the accuracy of data result.
On this class experimental provision, test, the student will spend a large amount of time and adjust the force value in when pressurization, thereby just reduced also that the student spends in the analysis of differentiation to the data result, error and to the time in the understanding of experimentation, ways and means, sometimes even can cause the misunderstanding of student to experimentation.And existing end socket edge stress test experiments platform, lack Computer Applied Technology and control technology, only be a pressure vessel easy, that be connected with cylindrical shell by end socket.
Summary of the invention
The purpose of this utility model provides a kind of distribution that can test out polytype end socket edge stress under any pressure, and can carry out the automatic experimental apparatus for testing of self-adjusting constant voltage automatic control polymorphic type end socket edge stress to force value.
The technical scheme that its technical matters that solves the utility model adopts is: it comprises and is fixed on bearing upper flat cover end socket, conical head, dome head and ellipsoidal head, it is by control pressurer system, oil path control system and data acquisition system (DAS) three parts constitute, total system is by a control platform operations, be fixed on bearing upper flat cover end socket, conical head, be respectively arranged with end socket tensimeter 5 on dome head and the ellipsoidal head, evacuated tube 2 and the pressure transducer 13 that joins with the control platform, the oil circuit that is connected with oil tank 12 through oil pump 10 and reversing solenoid valve 15 after respectively with flat head, conical head, oil pocket in dome head and the ellipsoidal head is connected, another branch of oil circuit links to each other with fuel tank through the oil inlet P of surplus valve and the oil return opening O of surplus valve, the oil return opening O of reversing solenoid valve links to each other with fuel tank again, and port B is plugged.Pressure transducer on the end socket links to each other with the PID regulator of control on the platform, and feedback signal is sent to the frequency converter of controlling on the platform, and the other end of frequency converter links to each other with motor 11 and controls the output quantity of oil pump 10.Stick on the lip-deep foil gauge 18 of end socket transition section and link to each other with the preset tandem-driving bogie, the preset tandem-driving bogie connects two branches, and a branch links to each other with the static resistance strainmeter, and another branch links to each other with computing machine through the A/D card.
The beneficial effects of the utility model are, overcome the deficiency of existing end socket edge stress test experiments teaching platform, it not only can test out the distribution of polytype end socket edge stress under any pressure, can not occur because the pressure surge that commutation is brought, test pressure is constant, the test data reliable results; And the adjustment of its force value will realize robotization; Solenoid valve has been adopted in the conversion of pressurization and uninstall process, has reduced the manually-operated time, and commutating speed is fast, and is simple in structure; Resulting experimental data can directly show on computer screen, and can compare with the Theoretical Calculation result, and its test data can directly be exported, show and print with figure, tabulation.The student is easier to understand and grasps the regularity of distribution of end socket edge stress, understand the means and the method for stress test, analysis and calculating.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is a structure principle chart of the present utility model.
Fig. 2 is oil path control system figure of the present utility model.
Fig. 3 is control pressurer system figure of the present utility model.
Fig. 4 is data acquisition system (DAS) figure of the present utility model.
Fig. 5 is that control operation deck plate of the present utility model is provided with figure.
Among the figure: 1. ellipsoidal head structure, 2. evacuated tube, 3. dome head structure, 4. control operation platform, 5. end socket tensimeter, 6. blowdown connection, 7. flat head structure, 8. conical head structure, 9. oil pipe, 10. oil pump, 11. motor, 12. oil tank, 13. pressure transducers, 14. surplus valves, 15. turn to solenoid valve, 16. line pressure tables, 17. fuel tank blow-down pipes, 18. foil gauge, 19. valves, 20. bearings.
Embodiment
Flat head and conical head are set to one group, dome head and ellipsoidal head is divided into another group, and all be fixed on them on the bearing, total system is by a control platform operations, and it comprises a control pressurer system, oil path control system, data acquisition system and microcomputer.On the panel of control platform, have: power switch, the gauge tap of solenoid valve, tensimeter is used for showing the pressure of oil circuit, the frequency converter display screen is used to show the revolution of converter parameter and motor, the screen of PID control instrument and microcomputer.Under the situation that does not have pressurization, stick resistance strain gage in the appropriate location of each end socket, and foil gauge is linked into tandem-driving bogie, the resistance balancing.Each end enclosure structure is provided with pressure gauge connection, oil-feed or oil drain out, the emptying interface, pressure sensor interface and sewage draining exit, wherein tensimeter that pressure gauge connection connects will directly show the actual pressure value in the end socket, the pressure transducer that pressure sensor interface connect can be sent to the actual pressure in the end socket PID controller, and the force value that actual pressure value and user is given compares, the deviation signal that is produced is delivered to frequency converter, signal controlling motor by the frequency converter generation, thereby change the output oil mass of oil pump, to reach the variation that changes the end socket internal pressure, when the force value in the end socket reaches user institute specified value, the user can be transformed into packing state with gauge tap, at this moment can be with the lip-deep stress value of static resistance end socket that strain-ga(u)ge measurement is pressurizeed, perhaps the signal that the static resistance tandem-driving bogie is come out is sent to the A/D transition card, directly measurement data is sent to computing machine and handles and show.After one group of data test is finished, readjust the parameter of PID control instrument, gauge tap is turned to pressurized state, to the end enclosure structure pressurization, proceed the test of second group of data again, so circulation is gone down.After data test is finished, gauge tap is turned to unloaded state, close motor, after unloading is finished, will control beginning and forward zero-bit to.
Control pressurer system is mainly used in the force value in the control end socket, it is made up of pressure transducer, PID control instrument, frequency converter, motor, oil pump etc., it has solved any setting of end socket internal pressure value, makes the user can arbitrarily control the interior force value of end socket.Owing to adopted the PID regulating and controlling, the force value in the end socket will reach equilibrium state automatically, and the fluctuation problem of end enclosure structure internal pressure value is resolved, and has reduced the manually time when adjusting constant pressure value.
Oil path control system is mainly used in to end socket pressurization and unloading, and it is made up of fuel tank, oil pump, motor, surplus valve, reversing solenoid valve and pipe system.The conversion of pressurization, pressurize and uninstall process all adopts reversing solenoid valve to operate, and commutation process is simple to operate understands that commutating speed is fast, has reduced time and the difficulty of using the valve operation commutation.Commutation process operation simultaneously is to occur in force value in the end enclosure structure to reach when stablize and carry out, and at this moment the flow in the pipeline is close to zero basically, adopts the quick commutation of reversing solenoid valve, and the force value in the end socket is because the pressure surge that commutation is produced also is zero.
Data acquisition system (DAS) is mainly gathered the data-signal of end socket edge stress, it is by foil gauge, the static resistance tandem-driving bogie, the static resistance strainmeter, the A/D card, data acquisition software, data signal line, compositions such as microcomputer interface, its principle is because the resistance wire in the foil gauge changes under the effect of external force, thereby cause the variation of resistance, the electric current that flows through foil gauge also can correspondingly change, the current signal that changes is sent to the static resistance strainmeter just can obtains the strain value that produced owing to the external force effect, just can obtain the stress value of measured foil gauge again by conversion Calculation.Or the signal that the static resistance tandem-driving bogie comes out delivered to the A/D card, analog signal conversion is digital signal after, by data acquisition software, on computer screen, show.
In Fig. 1, flat head 7 and conical head 8 are set to one group, dome head 3 and ellipsoidal head 1 is divided into another group, and they all are fixed on the bearing 20, total system is by a control platform operations, and all signal wires and oil circuit all will enter into the control operation platform.Simultaneously fuel tank 12, motor 11, surplus valve 14 and oil pump 10 also fix on one of them bearing 20, can make structure tightr like this, reduce floor area.
In Fig. 5, the display screen of the gauge tap of line pressure table 16, reversing solenoid valve 15, PID control instrument, reversing solenoid valve 15, power switch, frequency converter, computing machine etc. all are installed on the control operation platform.
When the tensimeter 5 in Fig. 4 is designated as zero, foil gauge 18 is sticked at 3 transition section places at dome head, then with signal wire and foil gauge 18 by being weldingly connected, the other end with signal wire connects on the binding post of preset tandem-driving bogie again, each foil gauge is carried out balance adjustment, and making the demonstration of each foil gauge on tandem-driving bogie all is zero.
In Fig. 2, adjust the force value of surplus valve 14.
In Fig. 5, open total power switch, on the PID control instrument, set a force value, and the parameters value of PID correspondingly is set.To control beginning and turn to pressing position, the reversing solenoid valve 15 that is about among Fig. 2 moves right, and makes it turn to pressing position.Open motor 11 switches, make it drive oil pump 10 and begin to rotate, give the pressurization of dome head 3 structural systems that to test.
In Fig. 3, increase along with dome head 3 internal pressures, the deviation signal that produces in the PID control instrument will be more and more littler, deviation signal is sent to frequency converter, the signal that frequency converter is exported also can be more and more a little less than, thereby the revolution that causes motor 11 is more and more littler, oil pump 10 the oil mass in the oil pipe that outputs to 9 also be close to zero at leisure.When the given force value of the 5 pointed users of the tensimeter on the dome head 3 and when remaining unchanged, gauge tap among Fig. 5 is dialled to packing state, the reversing solenoid valve 15 that is about among Fig. 2 is got back to zero-bit, it is mediated, and close the electric electromechanics source switch.
In Fig. 4, open the static resistance strainmeter, rotary knob is to each foil gauge 18, read strain value from the display screen of static resistance strainmeter, utilize Hooke's law again, can obtain the stress value on each foil gauge, just can obtain the stress distribution law of dome head 3 transition sections by mapping.Perhaps the signal wire that the preset tandem-driving bogie is come out links to each other with the A/D card, is digital signal by the A/D card with analog-signal transitions, be sent to computing machine, start the data processing software on the computing machine, detect digital signal, and detected signal shown on computer screen, also can be kept on the hard disc of computer detecting data, export and consult use after being provided with.
After finishing this group data test, reset a new force value in Fig. 5, repeat above-mentioned operating process, can obtain one group of test data again, so circulation is gone down.
After data test is finished, in Fig. 5, close the power supply of motor 11 and PID control instrument, the control corresponding switch is dialled to unloaded state, be that reversing solenoid valve 15 among Fig. 2 is moved to the left, make it be in unloaded state, the machine oil in the dome head will be got back to fuel tank 12 again by oil circuit 9, when the pointed of tensimeter 5 is zero, the expression unloading is finished, and gauge tap is dialled again to zero-bit, and promptly the reversing solenoid valve 15 of Fig. 2 is got back to the zero-bit state again.
Can see that in Fig. 1 a valve 19 is all arranged on the oil pipe 9 of each end enclosure structure system, its objective is to allow the user to select the end enclosure structure system to test as required.
On the oil pipe 9 tensimeter 16 is installed, whether its effect is by showing the pressure on the oil circuit, can demonstrate oil circuit and stop up, and in the end socket whether in pressurization, generally speaking, be provided with for security consideration.
Claims (3)
1, the automatic experimental apparatus for testing of a kind of constant voltage automatic control polymorphic type end socket edge stress, it comprises and is fixed on bearing upper flat cover end socket, conical head, dome head and ellipsoidal head, it is characterized in that: it is by control pressurer system, oil path control system and data acquisition system (DAS) three parts constitute, total system is by a control platform operations, be fixed on bearing upper flat cover end socket, conical head, be respectively arranged with end socket tensimeter (5) on dome head and the ellipsoidal head, evacuated tube (2) and the pressure transducer (13) that joins with the control platform, the oil circuit that is connected with oil tank (12) through oil pump (10) and reversing solenoid valve (15) after respectively with flat head, conical head, oil pocket in dome head and the ellipsoidal head is connected, another branch of oil circuit links to each other with fuel tank through the oil inlet P of surplus valve and the oil return opening 0 of surplus valve, the oil return opening 0 of reversing solenoid valve links to each other with fuel tank again, and port B is plugged.
2. the automatic experimental apparatus for testing of constant voltage automatic control polymorphic type end socket edge stress according to claim 1, it is characterized in that: the pressure transducer on the end socket links to each other with the PID regulator of control on the platform, feedback signal is sent to the frequency converter on the control platform, and the other end of frequency converter links to each other with motor (11) and controls the output quantity of oil pump (10).
3. the automatic experimental apparatus for testing of constant voltage automatic control polymorphic type end socket edge stress according to claim 1, it is characterized in that: stick on the lip-deep foil gauge of end socket transition section (18) and link to each other with the preset tandem-driving bogie, the preset tandem-driving bogie connects two branches, article one, branch links to each other with the static resistance strainmeter, and another branch links to each other with computing machine through the A/D card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03226762 CN2650091Y (en) | 2003-01-10 | 2003-01-10 | Constant pressure self-controlled multi-type sealed head edge stress automatic measurement and experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03226762 CN2650091Y (en) | 2003-01-10 | 2003-01-10 | Constant pressure self-controlled multi-type sealed head edge stress automatic measurement and experiment device |
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| Publication Number | Publication Date |
|---|---|
| CN2650091Y true CN2650091Y (en) | 2004-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03226762 Expired - Fee Related CN2650091Y (en) | 2003-01-10 | 2003-01-10 | Constant pressure self-controlled multi-type sealed head edge stress automatic measurement and experiment device |
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| CN (1) | CN2650091Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155538A (en) * | 2011-03-14 | 2011-08-17 | 哈尔滨锅炉厂有限责任公司 | Reusable welded hydraulic cover of boiler and pressure vessel and manufacturing method of reusable welded hydraulic cover |
| CN109682519A (en) * | 2018-12-29 | 2019-04-26 | 四川陆通检测科技有限公司 | Detecting and the system and method for stablizing effective prestress under intermediate plate displacement method test anchor |
-
2003
- 2003-01-10 CN CN 03226762 patent/CN2650091Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155538A (en) * | 2011-03-14 | 2011-08-17 | 哈尔滨锅炉厂有限责任公司 | Reusable welded hydraulic cover of boiler and pressure vessel and manufacturing method of reusable welded hydraulic cover |
| CN109682519A (en) * | 2018-12-29 | 2019-04-26 | 四川陆通检测科技有限公司 | Detecting and the system and method for stablizing effective prestress under intermediate plate displacement method test anchor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |