CN103940595B - Service life test bed for valve electric device - Google Patents
Service life test bed for valve electric device Download PDFInfo
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- CN103940595B CN103940595B CN201410095101.1A CN201410095101A CN103940595B CN 103940595 B CN103940595 B CN 103940595B CN 201410095101 A CN201410095101 A CN 201410095101A CN 103940595 B CN103940595 B CN 103940595B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention relates to a service life test bed for a valve electric device. The service life test bed comprises a work table, the valve electric device to be tested, a hydraulic control device used for providing loading torque for the valve electric device to be tested, and an electric control operation platform. The electric control operation platform is in circuit connection with the valve electric device, the hydraulic control device and the work table. When the valve electric device to be tested bears the torque applied by a piston and is tested, a linear proportion relation exists between the torque output by the valve electric device and the work time. Through the loading torque provided for the valve electric device by the hydraulic control device, more real valve operation states can be simulated for the valve electric device, the efficiency of testing the valve electric device is improved, the testing process becomes simpler, the testing parameters are dynamically displayed, the accuracy can be guaranteed, and the automation degree is improved.
Description
Technical field
The present invention relates to a kind of electric device for valve life test rack.
Background technology
Electric device for valve is to realize valve stroking, automatic control and remote control indispensable driving equipment, the general efficiency of life test detection method that common valve electric device manufacturing enterprise uses is low, test process is complicated, test parameter not dynamic presents, precision cannot guarantee that, and needs personnel the most on duty.
Pressing the true service requirement of valve, load characteristic is as shown in Fig. 1, during electric device for valve life test, to run moment of torsion operating, controls moment of torsion with maximum and closes (i.e. in figure one represented by vertical line part).So control valves test and can not simulate the real working condition of valve exactly.
Originally the electric device for valve life test rack of general enterprises is to use disk spring simulation valve load, and life test process exists many shortcomings, it is impossible to meet testing regulations requirement.
Electrical control uses catalyst, Control discrete component and simple disk spring to control device; the real-time data acquisition of electric device for valve test, analysis and communication can not be carried out; moment of torsion is indirectly to measure; the form of peak torque is i.e. determined by force moment protection on electric device for valve; the real-time moment of torsion in running cannot be read; so needing the debugging trimming process grown very much before each on-test, reduce the accuracy of electric device for valve life test, it is difficult to meet user's requirement.
Life test to do about 10000 times, in order to shorten test period, electric device for valve is typically taked to work continuously, so electric device for valve motor for short time duty can cause heating to increase, ordinary test platform does not has circulating cooling system, life test can only use artificial cooling, and labor intensity is very big, easily produces security incident.
Summary of the invention
The technical problem to be solved in the present invention is: providing a kind of electric device for valve life test rack, make adjustment electric device for valve in ten thousand life test, the load characteristic of electric device for valve can fully meet the true running status requirement of valve.
The technical solution adopted for the present invention to solve the technical problems is: a kind of electric device for valve life test rack, including workbench, electric device for valve to be measured, loading the hydraulic control device of moment of torsion and electric control console for providing to electric device for valve to be measured, electric control console forms circuit be connected with electric device for valve and hydraulic control device and workbench respectively.
Described hydraulic control device includes fuel tank, three-position four-way electromagnetic directional valve and oil cylinder, three-position four-way electromagnetic directional valve has first interface, the second interface, the 3rd interface and the 4th interface, described fuel tank and first interface pipeline connection, this pipeline is provided with oil pump, the oil-in of oil cylinder and oil-out are respectively through pipeline and the second interface and the 3rd orifice, 4th interface connects with fuel tank through oil return pipe, and the pipeline of the oil return pipe between the 4th interface and fuel tank is provided with proportional pressure control valve and pressure transducer.
Described electric device for valve is installed on the table, the output revolving shaft lower end of electric device for valve is connected with the piston of oil cylinder through torque sensor and torque drive leading screw, described torque drive leading screw forms threaded engagement with workbench, and the upper end of torque drive leading screw is connected with output revolving shaft through torque sensor；Torque drive leading screw drives to rotate with the nut screw on workbench through torque sensor and realizes moving up and down, thus drives the piston up-down of oil cylinder.
Described electric device for valve is when life test, and electric device for valve experiences operation phase and load phase successively, in load phase, and moment of torsion that electric device for valve provides and there is linear ratio relation between the working time.
Further, described workbench includes four root posts of platen and bottom, electric device for valve to be measured is arranged on platen through ut socket, forms threaded engagement between torque drive leading screw and platen, and torque drive leading screw through ut socket and is connected with ut socket threaded engagement.
Further, described torque drive leading screw lower end is connected through platen with piston, the bottom of torque drive leading screw is provided with the triatic stay for keeping torque drive leading screw stability, triatic stay coordinates with torque drive threads of lead screw, the two ends of triatic stay are separately installed with copper sheathing, the copper sheathing at two ends contacts with the column of both sides respectively, and described copper sheathing is semicircular structure.
Further, upper limit position switch, lower position switch and loaded switches it is provided with on described column, loaded switches is between upper limit position switch and lower position switch, and upper limit position switch, lower position switch and loaded switches form circuit with electric control console respectively and be connected.
When copper sheathing is touched with upper limit position switch, torque drive leading screw stops up；When copper sheathing is touched with loaded switches, torque drive leading screw load operating；When copper sheathing is touched with lower position switch, torque drive leading screw stops descending.
When electric device for valve is in the operation phase, described copper sheathing is between upper limit position switch and loaded switches；When electric device for valve is in load phase, described copper sheathing is between loaded switches and lower position switch.
Further, being positioned on the pipeline of first interface import department the first overflow valve being provided with for protecting three-position four-way electromagnetic directional valve commutation safety, the first described overflow valve is electromagnetic relief valve, and is connected with electric control console formation circuit.
Further, it is positioned on the pipeline at fuel pump outlet and is communicated with the second overflow valve.
Further, it is positioned on the pipeline of oil cylinder oil inlet mouth and oil-out and is respectively arranged with one-way throttle valve.
Further, the pipeline between described fuel tank and three-position four-way electromagnetic directional valve being also equipped with filter and check valve, filter is arranged on the pipeline between oil pump and fuel tank.
Further, described electric control console includes industrial computer, PLC and expanding element, this industrial computer has liquid crystal display touch screen, PLC accepts data and the parameter fed back of torque sensor of industrial computer transmission, and the proportional overflow output regulation of described proportional pressure control valve controls via the expanding element of PLC.
Further, described workbench is additionally provided with the chiller for lowering the temperature the motor of electric device for valve.
The invention has the beneficial effects as follows: provide load torque by hydraulic control device for electric device for valve, can be that electric device for valve simulates more real valve running status, improve the efficiency of electric device for valve test, test process is made to become simpler, and test parameter is Dynamic Announce, accuracy also can be guaranteed, and automaticity is improved.
Use EVC touch panel computer and PLC, replace catalyst, relay control system, sensor and instrumentation are carried out real-time data acquisition, set up the man machine interface of close friend simultaneously, make the operation operation of whole pilot system simpler intuitively, and parameter can be controlled with real time modifying and monitoring, and record and output.
Increase circulating water cooling device, the motor of timely coolant valve electric device, it is ensured that whole life test smoothly completes.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the load characteristic of the front testing stand of transformation.
Fig. 2 is the nominal moment of torsion load characteristic less than 1200N.M electric device for valve.
Fig. 3 be valve be opened to and close to the schematic diagram of standard testing time.
Fig. 4 is the hydraulic principle figure in hydraulic control device.
Fig. 5 is the schematic diagram of testing stand of the present invention.
Fig. 6 is the attachment structure schematic diagram between torque drive leading screw and ut socket, workbench.
Fig. 7 is testing stand control structure block diagram.
In figure 1, workbench, 2, electric device for valve, 3, hydraulic control device, 4, electric control console, 5, chiller, 6, ut socket, 7, torque sensor, 8, torque drive leading screw, 9, triatic stay, 91, copper sheathing；31, fuel tank, 32, three-position four-way electromagnetic directional valve, 33, oil cylinder, 34, oil pump, 35, proportional pressure control valve, the 36, first overflow valve, 37, the second overflow valve, 38, one-way throttle valve, 39, filter, 331, piston, 11, platen, 12, column, 13, upper limit position switch, 14, lower position switch, 15, loaded switches.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, and the basic structure of the present invention is described the most in a schematic way, and therefore it only shows the composition relevant with the present invention.
As shown in Fig. 4 Fig. 5 Fig. 6, a kind of electric device for valve life test rack, including workbench 1, electric device for valve to be measured 2, loading the hydraulic control device 3 of moment of torsion and electric control console 4 for providing to electric device for valve 2 to be measured, electric control console 4 forms circuit be connected with electric device for valve 2 and hydraulic control device 3 and workbench 1 respectively.
Hydraulic control device 3 includes fuel tank 31, three position four-way directional control valve 32 and oil cylinder 33, three-position four-way electromagnetic directional valve 32 has first interface, the second interface, the 3rd interface and the 4th interface, fuel tank 31 and first interface pipeline connection, this pipeline is provided with oil pump 34, the oil-in of oil cylinder 33 and oil-out are respectively through pipeline and the second interface and the 3rd orifice, 4th interface connects with fuel tank 31 through oil return pipe, and the pipeline of the oil return pipe between the 4th interface and fuel tank 31 is provided with proportional pressure control valve 35 and pressure transducer.
Electric device for valve 2 is arranged on workbench 1, the output revolving shaft lower end of electric device for valve 2 is connected with the piston 331 of oil cylinder 33 through torque drive leading screw 8, torque drive leading screw 8 and workbench 1 form threaded engagement, and the upper end of torque drive leading screw 8 is connected transmission through torque sensor 7 with output revolving shaft；Torque drive leading screw 8 drives through torque sensor 7 and realizes moving up and down with workbench 1 helical rotation, thus drives the piston 331 of oil cylinder 33 to move up and down；The moment of torsion that electric device for valve 2 electric device for valve 2 to be measured provides is consistent with the torque characteristics under valve real work state.
Electric device for valve 2 bear piston 331 load moment of torsion test time, electric device for valve 2 experiences operation phase and load phase successively, in load phase, moment of torsion that electric device for valve 2 provides and there is linear ratio relation between the working time.
Workbench 1 includes four root posts 12 of platen 11 and bottom, electric device for valve 2 to be measured is arranged on platen 11 through ut socket 6, forming threaded engagement between torque drive leading screw 8 and platen 11, torque drive leading screw 8 through ut socket 6 and is connected with ut socket 6 threaded engagement；Attachment structure between torque drive leading screw 8 and ut socket 6 is, in ut socket 6, axle sleeve is installed, formed by ball bearing between axle sleeve and ut socket 6 and be rotatably assorted, torque drive leading screw 8 passes axle sleeve and is that the inner ring with axle sleeve forms threaded engagement, electric device for valve 2 can be stably fixed on platen 11 owing to there being the existence one of ut socket 6 to be, two is the stability that can effectively keep torque drive leading screw 8, it is to avoid torque drive leading screw 8 occurs the phenomenon of double swerve pulling piston 331 up when.
Torque drive leading screw 8 lower end is connected through platen 11 with piston 331, the bottom of torque drive leading screw 8 is provided with the triatic stay 9 for keeping torque drive leading screw 8 stability, triatic stay 9 and torque drive leading screw 8 threaded engagement, the two ends of triatic stay 9 are separately installed with copper sheathing 91, copper sheathing 91 is semicircular structure, and the copper sheathing 91 at two ends contacts with the column 12 of both sides respectively.Copper sheathing 91 is semicircular structure primarily to avoid the phenomenon occurring jam between copper sheathing and column.
The existence of triatic stay 9 is also for the stability keeping torque drive leading screw 8, it is to avoid the lower end of torque drive leading screw 8 occurs the phenomenon of double swerve pulling piston 331 up when.
Upper limit position switch 13, lower position switch 14 and loaded switches 15 it is provided with on column 12, loaded switches 15 is between upper limit position switch 13 and lower position switch 14, and upper limit position switch 13, lower position switch 14 and loaded switches 15 form circuit with electric control console 4 respectively and be connected.
When copper sheathing 91 is touched with upper limit position switch 13, torque drive leading screw 8 stops up；When copper sheathing 91 is touched with loaded switches 15, torque drive leading screw 8 load operating；When copper sheathing 91 is touched with lower position switch 14, torque drive leading screw 8 stops descending.
When electric device for valve 2 is in the operation phase, copper sheathing 91 is between upper limit position switch 13 and loaded switches 15, and when electric device for valve 2 is in load phase, copper sheathing 91 is between loaded switches 15 and lower position switch 14.When copper sheathing 91 contacts with loaded switches 15 when, PLC controls proportional pressure control valve work, thus torque drive leading screw 8 is provided and loads moment of torsion by piston, the output revolving shaft of electric device for valve 2 now starts load running, and when copper sheathing 91 contacts with loaded switches, torque drive leading screw 8 stops descending.
Being positioned on the pipeline of first interface import department and be provided with for protecting three-position four-way electromagnetic directional valve 32 to commutate the first safe overflow valve 36, the first overflow valve 36 is electromagnetic relief valve, and forms circuit with electric control console 4 and be connected.Can make three-position four-way electromagnetic directional valve 32 commutation when by this electromagnetic relief valve; high pressure produced by backpressure circuit is discharged; when avoiding commutating, the high pressure instantaneous herk of back pressure end is to low pressure, input end; impact and affect the normal use of the low-voltage components such as input circuit oil pump; guarantee the service life of hydraulic pressure input, the first overflow valve 36 to undertake three-position four-way electromagnetic directional valve 32 intelligent protection commutation function.
It is positioned on the pipeline in oil pump 34 exit and is communicated with the second overflow valve 37.The in-line of the second overflow valve 37 is provided with Pressure gauge, the oil pressure of input from oil pump 34 can be controlled through the second overflow valve 37, the stably oil pressure of the oil cylinder 33 during entrance first interface, it is to avoid unstable oil pressure produces impact impact to three-position four-way electromagnetic directional valve 32 components and parts such as grade.
The pipeline of oil cylinder 33 oil-in and oil-out is respectively arranged with one-way throttle valve 38.May insure that the normal work of oil cylinder 33 through two one-way throttle valves 38, make the piston 331 of oil cylinder 33 have stable oil pressure cntrol when flexible, it is to avoid shake occurs when oil cylinder piston 331 stretches and tilts.Filter 39 and check valve it is also equipped with on pipeline between fuel tank 31 and three-position four-way electromagnetic directional valve 32, filter 39 is arranged on the pipeline between oil pump 34 and fuel tank 31, keep the cleaning of oil cylinder 33 hydraulic oil, the Main Function of check valve is to prevent hydraulic oil withdrawing oil pump discharge, damage oil pump 34, it is ensured that the hydraulic system of hydraulic control device 3 has stable oil pressure and is operated.
The chiller 5 for the motor of electric device for valve 2 is lowered the temperature it is additionally provided with on workbench 1.During test, electric device for valve 2 life test needs to do the long run test of about 10000 times, and the motor of electric device for valve 2 is the motor of short time duty, long time continuous working motor can produce the phenomenon of heating, so being additionally provided with the chiller 5 for the motor of electric device for valve 2 is lowered the temperature on workbench 1, chiller 5 is for the motor of timely coolant valve electric device 2, it is ensured that whole life test smoothly completes.
Electric control console 4 includes industrial computer, PLC(Programmable Logic Controller) and expanding element, this industrial computer has liquid crystal display touch screen, PLC accepts data and the parameter fed back of torque sensor 7 of industrial computer transmission, and the expanded unit of overflow ratio of proportional pressure control valve 35 controls.Upper limit position switch 13, lower position switch 14 and loaded switches 15 electrically connect with PLC respectively, by PLC control.
nullDuring practical operation，The test parameters of electric device for valve 2 is required to input industrial computer by the liquid crystal display touch screen on industrial computer by operator，Input parameter is modified conversion by industrial computer，Send PLC to，The torque parameter of test parameters and the electric device for valve 2 of torque sensor 7 Real-time Feedback is compared computing by PLC，Send expanding element to after carrying out nonlinear compensation simultaneously，Parameter is changed into normalized current and controls proportional pressure control valve 35 by expanding element，Proportional pressure control valve 35 is according to the back pressure value in input current regulation oil cylinder 33 backpressure circuit，Economy makes the piston 331 of oil cylinder 33 move up and down generation resistance change，The loading moment of torsion of the resistance change control valve electric device 2 of piston 331，Make moment of torsion fully according to the true torque loads characteristic variations run under duty of valve，This truth is i.e. as shown in Fig. 2，The loading procedure of electric device for valve 2，I.e. represented by figure bend part.
As represented with thrust, i.e. running with the maximum thrust of 1/3rd, close with maximum thrust, load characteristic is as shown in Figure 2.Electric device for valve 2 one open-one close is for operating once.The time once that often operates is 40s.I.e. open 10s, stop 10s, close 10s, stop 10s.Operation time characteristic is as shown in Fig. 3.
If electric device for valve 2 moment of torsion produces fluctuation because of interference, torque sensor 7 can make an immediate response, PLC meeting adjusted in concert proportional pressure control valve 35, makes the hydraulic pressure change of backpressure circuit meet the test requirements document of moment of torsion.The cooling of the motor of electric device for valve 2 controls directly to be controlled according to variations in temperature by PLC.So the overall control flow of testing stand is as shown in Fig. 7.
In the hydraulic system of hydraulic control device 3, proportional pressure control valve 35 controls the oil pressure (i.e. the back pressure of oil cylinder 33) in oil cylinder 33 outlet line, and proportional pressure control valve 35 can change the size of overfall according to test requirements document, completes to control the oil pressure of place pipeline；The piston 331 of oil cylinder 33, during stretching out or retracting, can make the outlet line of oil cylinder 33 all be held on the oil return pipe at proportional pressure control valve 35 place through three-position four-way electromagnetic directional valve 32.Hydraulic system provides the input oil pressure of oil cylinder 33, the input of oil pump the 34, first overflow valve the 36, second overflow valve 37 each Pressure gauge composition hydraulic system；Proportional pressure control valve 35 controls the back pressure in oil cylinder 33 outlet line and realizes moment of torsion proportion adjustment when loading high pressure; pressure transducer realizes monitoring high-pressure side pressure in real time; completing to monitor back pressure, connect electric control console 4 and realize the protection to hydraulic system, they constitute back pressure outfan.
Testing stand can be automatically by the data point reuse load arranged, load characteristic is consistent with true operation of valve, touch screen interface is convenient to be realized operation and arranges, and electric device for valve 2 exports the real-time tracking regulation control of moment of torsion, the circulating cooling of subjects, electric device for valve 2 load and the Automated condtrol process of process data recording.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff can carry out various change and amendment completely in the range of without departing from this invention technological thought.The content that the technical scope of this invention is not limited in description, it is necessary to determine its technical scope according to right.
Claims (1)
1. an electric device for valve life test rack, including workbench (1), electric device for valve to be measured (2), is used for providing hydraulic control device (3) and the electric control console (4) of loading moment of torsion to electric device for valve to be measured (2)；Electric control console (4) forms circuit with electric device for valve (2) and hydraulic control device (3) and workbench (1) respectively and is connected；It is characterized in that:
Described hydraulic control device (3) includes fuel tank (31), three-position four-way electromagnetic directional valve (32) and oil cylinder (33)；Three-position four-way electromagnetic directional valve (32) has first interface, the second interface, the 3rd interface and the 4th interface；Described fuel tank (31) and first interface pipeline connection, be provided with oil pump (34) on this pipeline, and oil pump (34) is low voltage component；The oil-in of oil cylinder (33) and oil-out are respectively through pipeline and the second interface and the 3rd orifice；4th interface connects with fuel tank (31) through oil return pipe, and the pipeline of the oil return pipe between the 4th interface and fuel tank (31) is provided with proportional pressure control valve (35) and pressure transducer；It is positioned on the pipeline of first interface import department the first overflow valve (36) being provided with for protecting three-position four-way electromagnetic directional valve (32) commutation safety, is positioned on the pipeline in oil pump (34) exit and is communicated with the second overflow valve (37)；Described the first overflow valve (36) is electromagnetic relief valve, and is connected with electric control console (4) formation circuit；Can make three-position four-way electromagnetic directional valve (32) commutation when by this electromagnetic relief valve, high pressure produced by backpressure circuit be discharged, it is to avoid during commutation, the high pressure instantaneous herk of back pressure end is to low pressure, input end；Hydraulic system provides the input oil pressure of oil cylinder (33), the input of oil pump (34), the first overflow valve (36), the second overflow valve (37) each Pressure gauge composition hydraulic system；Control the back pressure in oil cylinder (33) outlet line at proportional pressure control valve (35) and realize moment of torsion proportion adjustment when high pressure is loaded; pressure transducer realizes monitoring high-pressure side pressure in real time; complete to monitor back pressure; when connecting the protection that electric control console (4) realizes hydraulic system, they constitute back pressure outfan；
Described electric device for valve (2) is arranged on workbench (1)；The output revolving shaft lower end of electric device for valve (2) is connected with the piston (331) of oil cylinder (33) through torque drive leading screw (8), described torque drive leading screw (8) forms threaded engagement with workbench (1), and the upper end of torque drive leading screw (8) is connected transmission through torque sensor (7) with output revolving shaft；Torque drive leading screw (8) drives through torque sensor (7) and realizes moving up and down with workbench (1) helical rotation, thus drives the piston (331) of oil cylinder (33) to move up and down；
Described electric device for valve (2) is when life test, and electric device for valve (2) experiences operation phase and load phase successively, in load phase, and moment of torsion that electric device for valve (2) provides and there is linear ratio relation between the working time.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611029051.2A CN106768914B (en) | 2014-03-14 | 2014-03-14 | It can prevent hydraulic oil reflux and stablize the pilot system in the electric device for valve service life of oil pressure |
| CN201410095101.1A CN103940595B (en) | 2014-03-14 | 2014-03-14 | Service life test bed for valve electric device |
| CN201611023110.5A CN106644427A (en) | 2014-03-14 | 2014-03-14 | Automation control electric valve actuator life test system capable of non-linear compensation |
| CN201611029109.3A CN106441855B (en) | 2014-03-14 | 2014-03-14 | The pilot system in the electric device for valve service life with torque drive leading screw and triatic stay |
| CN201611023097.3A CN106707052A (en) | 2014-03-14 | 2014-03-14 | Electric valve apparatus service life test system capable of carrying out automatic circulation cooling |
| CN201611029134.1A CN106568593B (en) | 2014-03-14 | 2014-03-14 | With loading and the electric device for valve service life experiment system for protection of transfiniting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410095101.1A CN103940595B (en) | 2014-03-14 | 2014-03-14 | Service life test bed for valve electric device |
Related Child Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611029134.1A Division CN106568593B (en) | 2014-03-14 | 2014-03-14 | With loading and the electric device for valve service life experiment system for protection of transfiniting |
| CN201611023097.3A Division CN106707052A (en) | 2014-03-14 | 2014-03-14 | Electric valve apparatus service life test system capable of carrying out automatic circulation cooling |
| CN201611029051.2A Division CN106768914B (en) | 2014-03-14 | 2014-03-14 | It can prevent hydraulic oil reflux and stablize the pilot system in the electric device for valve service life of oil pressure |
| CN201611023110.5A Division CN106644427A (en) | 2014-03-14 | 2014-03-14 | Automation control electric valve actuator life test system capable of non-linear compensation |
| CN201611029109.3A Division CN106441855B (en) | 2014-03-14 | 2014-03-14 | The pilot system in the electric device for valve service life with torque drive leading screw and triatic stay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103940595A CN103940595A (en) | 2014-07-23 |
| CN103940595B true CN103940595B (en) | 2017-01-11 |
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Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611023110.5A Pending CN106644427A (en) | 2014-03-14 | 2014-03-14 | Automation control electric valve actuator life test system capable of non-linear compensation |
| CN201611029134.1A Expired - Fee Related CN106568593B (en) | 2014-03-14 | 2014-03-14 | With loading and the electric device for valve service life experiment system for protection of transfiniting |
| CN201410095101.1A Expired - Fee Related CN103940595B (en) | 2014-03-14 | 2014-03-14 | Service life test bed for valve electric device |
| CN201611023097.3A Pending CN106707052A (en) | 2014-03-14 | 2014-03-14 | Electric valve apparatus service life test system capable of carrying out automatic circulation cooling |
| CN201611029051.2A Expired - Fee Related CN106768914B (en) | 2014-03-14 | 2014-03-14 | It can prevent hydraulic oil reflux and stablize the pilot system in the electric device for valve service life of oil pressure |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611023110.5A Pending CN106644427A (en) | 2014-03-14 | 2014-03-14 | Automation control electric valve actuator life test system capable of non-linear compensation |
| CN201611029134.1A Expired - Fee Related CN106568593B (en) | 2014-03-14 | 2014-03-14 | With loading and the electric device for valve service life experiment system for protection of transfiniting |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611023097.3A Pending CN106707052A (en) | 2014-03-14 | 2014-03-14 | Electric valve apparatus service life test system capable of carrying out automatic circulation cooling |
| CN201611029051.2A Expired - Fee Related CN106768914B (en) | 2014-03-14 | 2014-03-14 | It can prevent hydraulic oil reflux and stablize the pilot system in the electric device for valve service life of oil pressure |
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| CN (5) | CN106644427A (en) |
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| CN106441855B (en) * | 2014-03-14 | 2018-08-17 | 杨卫中 | The pilot system in the electric device for valve service life with torque drive leading screw and triatic stay |
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| CN106840645B (en) * | 2017-04-11 | 2023-06-02 | 兰州理工大学温州泵阀工程研究院 | Static pressure life test system for valve |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106644427A (en) | 2017-05-10 |
| CN106568593A (en) | 2017-04-19 |
| CN106568593B (en) | 2019-03-01 |
| CN103940595A (en) | 2014-07-23 |
| CN106768914B (en) | 2019-07-26 |
| CN106768914A (en) | 2017-05-31 |
| CN106707052A (en) | 2017-05-24 |
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