CN106370413A - Testing apparatus for service life of load of valve execution mechanism and using method thereof - Google Patents
Testing apparatus for service life of load of valve execution mechanism and using method thereof Download PDFInfo
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- CN106370413A CN106370413A CN201610924434.XA CN201610924434A CN106370413A CN 106370413 A CN106370413 A CN 106370413A CN 201610924434 A CN201610924434 A CN 201610924434A CN 106370413 A CN106370413 A CN 106370413A
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- valve actuator
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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
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Abstract
The invention provides a testing apparatus for a service life of a load of a valve execution mechanism and a using method thereof. The testing apparatus comprises a rack, a rotating mechanism and a loading mechanism. The rack is supported between a top plate and a bottom plate by support posts. A testing plate covers the top plate. Rotating shafts are installed in bearings between the top plate and the bottom plate and the upper ends of the rotating shafts pass out of the top plate and a mounting plate. More than one rotating plate is installed on the rotating shafts horizontally and rotates with the rotating shafts. The loading mechanism includes friction plates and hydraulic systems; through holes are formed in the friction plates and the friction plates sleeve the support posts through the through holes. One friction plate is arranged below each rotating plate; and the friction plates are separated by sleeving rings arranged on the support posts. The hydraulic systems are installed on the bottom plate and mandrils of the hydraulic systems support the bottom friction plates; under pushing of the mandrils, upward contact with the rotating plates is realized and the last friction plate is pushed upwardly by the sleeving ring and is in contact with the rotating plate arranged on the friction plate; and the rotating plates and the friction plates in close contact with the rotating plates respectively generate friction and the friction forces are transformed into torques by the rotating shafts, thereby realizing testing of the service life of the load of the valve execution mechanism.
Description
Technical field
The present invention relates to a kind of valve actuator load life test device and its using method, belong to valve execution machine
Structure technical field of quality detection.
Background technology
Valve actuator typically works in the case of bearing load, therefore, valve actuator bear negative
Service life in the case of load, is an important quality technical specification of valve actuator.Investigate the side of this technical specification
The most objective, the most just method of method certainly production application when practice examining, however, the obvious nothing of such practice examining
Method is carried out on each valve actuator, therefore, by certain rule extraction sample, is entered by the load test of laboratory
Row detection, just becomes investigation valve actuator under the conditions of carrying, an important method of its service life.
Bear it may first have to add one on valve actuator in laboratory test valve actuator load life
Carry, then start test and measure.During this it is necessary to have a kind of can simulate or equivalent valve load device, ability
Carry out the load life detection test of valve actuator.
In prior art, its load of the fictitious load charger being usually used is by disk spring extrusion friction piece,
Make friction plate produce frictional force with fixing frictional disk on the rotating shaft, then, frictional force is converted to by moment of torsion by rotary shaft
Pass to valve actuator, the load born during simulation valve actuator opening/shutting valve.
This its major defect of fictitious load charger is:
Firstly, since the frictional force of device is to be produced by the deformation of disk spring, once the power being added on disk spring determines,
The spring force that disk spring produces also determines that, thus frictional force or cry load, damp and also determine that, that is, in test process
Corresponding one kind can load, cannot change during test, therefore, the versatility of device is poor；
Secondly, during the plant running of this form, caloric value is very big, and the change of temperature is very big to the elasticity effect of disk spring,
Thus, the moment of torsion of this device is uncontrollable, it is impossible to provide constant load as the standard of test in process of the test；
In addition, this kind of device is in use, it is also easy to bite, disk spring is also easily deformed, deviates from, cause to load and lose
Lose.
Content of the invention
For solving drawbacks described above of the prior art, the present invention provides a kind of valve actuator load life test device
And its using method, load stable, reliability to reach, be easy to regulating load amount, improve the device suitability, the purpose of versatility,
Meet the needs that valve actuator carries life test.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that:
A kind of valve actuator load life test device it is characterised in that: include frame, rotating mechanism and load maintainer；
Described frame includes the pillar of top board, base plate and more than three；Pillar is supported between top board and base plate and is allowed to form one
Individual machine cavity, top board is also covered with one piece of bread board for disposing actuator；
Described rotating mechanism includes rotary shaft, rotation dish and bearing；It is respectively mounted bearing, rotary shaft in the central authorities of top board and base plate
It is arranged in two bearings and upper end passes top board and installing plate, more than one piece of rotation dish is horizontally arranged at the rotation in machine cavity
Rotate can on axle and with rotary shaft；
Described load maintainer includes friction plate and hydraulic system；The through hole that has on friction plate is simultaneously sleeved on pillar by through hole
On, each setting in lower section of each rotation dish is a piece of, and between every, the collar with being enclosed within pillar separates；Hydraulic system is arranged on bottom
On plate, its push rod withstands on the friction plate of bottom, by the pushing tow of push rod, it can be made to be close to rotation dish upwards and pass through the collar
By the upper friction plate rotation dish that pushing tow is close to thereon upwards；
When turn disc, friction can be produced with the rotation dish being each close to, frictional force can be changed into by rotary shaft
Moment of torsion, for the load life test of valve actuator.
As a kind of preferred technical scheme, described rotation dish is 2～10 pieces.
As a kind of preferred technical scheme, its material of described rotation dish is cuprio.
As a kind of preferred technical scheme, its material of described friction plate is cast iron.
As a kind of preferred technical scheme, described hydraulic system adopts slim servo hydraulic cylinder.
A kind of using method of above-mentioned valve actuator load life test device is it is characterised in that include following walking
Rapid:
A) tested valve actuator is installed on bread board 14 and its rotating shaft is fixed even with the rotary shaft 21 on this device
Connect；
B) start hydraulic system 32 so as to the pressure of output reaches the numerical value required for detection and keeps this output pressure；
C) start valve actuator, make the rotating shaft of valve actuator drive the rotary shaft 21 on this device to rotate, carry out valve
The test in door actuator load life-span；
If d) the moment of torsion of test to be adjusted, when shutting down or be online, can be carried out by adjusting hydraulic system output pressure.
E) it is completed, is operated by the inverse process of above-mentioned steps, first close down valve actuator, unload carrier fluid again
Pressure system and then pull down valve actuator and complete test job.
Compared with prior art, its advantage of the present invention and marked improvement are:
1) a kind of valve actuator load life test device that the present invention provides, by the pushing tow of hydraulic system push rod, makes
Friction plate fit with rotation dish generation friction, by the pressure conversion of hydraulic system be frictional force, then by rotary shaft be converted to add
It is loaded in the load on detected valve actuator, due to the pressure stability of hydraulic system output, and can carry out as needed
On-line tuning, so, load stable, reliable, moment of torsion is easy to adjust, and the suitability, versatility significantly increase；
2) a kind of initial producer of valve actuator load life its moment of torsion of test device that the present invention provides is hydraulic pressure system
The pressure that system produces, generally, the pressure that hydraulic system produces is not influenced by temperature, also will not prolonging because of the working time
Continue and exhaustion, therefore, the moment of torsion of output is stable, controlled, and can be consistent the load longevity so that valve actuator for a long time
Life test data is true, reliable, credible, and favorable reproducibility；
3) adopt hydraulic control because a kind of valve actuator load life test device that the present invention provides increases to bear or lighten the burden,
Tighten or loosen the control nut of disk spring without going through manpower, so, manipulation is easy to use, is not easy card during use
Puckery, more no disk spring deformation, abjection, cause to load melancholy unsuccessfully；
4) a kind of valve actuator load life test device that the present invention provides is due to employing multi-disc friction piece and rotation
The laminating friction of disk is so that be delivered to the moment of torsion of each point in rotary shaft uniformly, rotary shaft slow-roll stabilization is so that test process becomes
Smooth-going, safety.
Brief description
A kind of structural representation of valve actuator load life test device that Fig. 1 provides for the present invention.
In figure:
11- top board, 12- base plate, 13- pillar, 14- bread board, the 15- collar；
21- rotary shaft, 22- rotation dish, 23- bearing；
31- friction plate, 32- hydraulic system, 33- push rod.
Specific embodiment
Below in conjunction with the accompanying drawings and brief description and embodiment technical scheme that the present invention is provided is done further specifically
Bright.
Embodiment
As shown in a kind of structural representation of valve actuator load life test device of Fig. 1 present invention offer:
A kind of valve actuator load life test device, including frame, rotating mechanism and load maintainer；
Frame includes the pillar 13 of top board 11, base plate 12 and more than three；Pillar 13 is supported on to be made between top board 11 and base plate 13
One machine cavity of formation, top board 11 is also covered with one piece for disposing the bread board 14 of actuator；
Rotating mechanism includes rotary shaft 21, rotation dish 22 and bearing 23；It is respectively mounted bearing in the central authorities of top board 11 and base plate 12
23, rotary shaft 21 is arranged in two bearings 23 and upper end passes top board 11 and installing plate 14, more than one piece of rotation dish 22 water
Rotate can in the rotary shaft 21 that safety is contained in machine cavity and with rotary shaft 21；
Load maintainer includes friction plate 31 and hydraulic system 32；The through hole that has on friction plate 31 is simultaneously sleeved on pillar by through hole
On 12, each setting in lower section of each rotation dish 22 is a piece of, and between every, the collar 15 with being enclosed within pillar 12 separates；Hydraulic system
32 are arranged on base plate 12, and its push rod 33 withstands on the friction plate 32 of bottom, by the pushing tow of push rod 33, can make it to tightening
Patch rotation dish 22, and by the collar 15 by a upper friction plate 31 rotation dish 22 that pushing tow is close to thereon upwards；When 22 turns of rotation dish
When dynamic, friction can be produced with the rotation dish 22 being each close to, frictional force can be changed into by moment of torsion by rotary shaft 21, for valve
The load life test of door actuator.
As a kind of preferred technical scheme, the quantity of rotation dish 22 is 2～10 pieces；In the present embodiment, rotation dish 22
Quantity is six pieces, and accordingly, the quantity of friction plate 31 is six pieces.
As a kind of preferred technical scheme, described its material of rotation dish 22 is cuprio.
As a kind of preferred technical scheme, described its material of friction plate 31 is cast iron.
As a kind of preferred technical scheme, described hydraulic system 32 adopts slim servo hydraulic cylinder.
When a kind of valve actuator load life test device that the present invention provides uses, its step is mainly:
A) install in bread board 14 first and be test for valve actuator, and by the rotating shaft of valve actuator and this dress
The rotary shaft 21 put is fixedly connected；
B) and then, start hydraulic system 32 so as to push rod 33 withstands on the friction plate 32 of this device bottom, and pass through push rod 33
Pushing tow so as to be close to rotation dish 22 upwards, and by the collar 15 by the rotation that pushing tow is close to thereon upwards of a upper friction plate 31
Disk 22；Continue to start hydraulic system 32, so that the pressure that hydraulic system 32 exports is reached the numerical value required for detection and keep this
Output pressure；
C) start valve actuator, make the rotating shaft of valve actuator drive the rotary shaft 21 on this device to rotate, go forward side by side one
Step drives rotation dish 22 to rotate；Because friction plate 31 is close to rotation dish 22 under the pressure that hydraulic system 32 exports, work as rotation dish
During 22 rotation, just produce friction with the rotation dish 22 being each close to, this friction is converted into moment of torsion, by rotary shaft 21
It is delivered to eventually in the rotating shaft of valve actuator, valve actuator carries out the test of load life by this moment of torsion.
If d) the moment of torsion of test to be adjusted, when shutting down or be online, all can be by adjusting the pressure of hydraulic system 32 output
Can complete, very convenient；By the pressure of fine setting adjustment hydraulic system 32 output, but make the long-term holding one of moment of torsion of output
Cause；
E) it is completed, is operated by the inverse process of above-mentioned steps, first close down valve actuator, unload hydraulic pressure system again
System 32 and then pull down valve actuator and complete test job.
From Fig. 1 and foregoing description it can be seen that
1) a kind of valve actuator load life test device that the present invention provides, is the pushing tow by hydraulic system push rod,
So that friction plate is fitted with rotation dish and produce friction, the pressure conversion of hydraulic system is frictional force, then is converted to by rotary shaft
It is carried in the load of detected valve actuator, for the detection of valve actuator load life, due to hydraulic system
The pressure stability of output and on-line tuning can be carried out as needed, so, load stable, reliable, moment of torsion is easy to adjust, it is suitable for
Property, versatility significantly increase than the related device of prior art；
2) a kind of initial producer of valve actuator load life its moment of torsion of test device that the present invention provides is hydraulic pressure system
The pressure that system produces, and generally, the pressure that hydraulic system produces is not influenced by temperature, also will not be because of the working time
Continue and exhaustion, therefore, the moment of torsion of output is stable, controlled, and can be consistent the load so that valve actuator for a long time
Life test data is true, reliable, credible, favorable reproducibility, is not in the elasticity affecting disk spring because of temperature change, from
And lead to the uncontrollable of device moment of torsion it is impossible to obtain accurate test result；
3) adopt hydraulic control because a kind of valve actuator load life test device that the present invention provides increases to bear or lighten the burden,
Tighten or loosen the control nut of disk spring without going through manpower, so, convenient using manipulation, it is not easy card during use
Puckery, more no disk spring deformation, abjection, cause to load melancholy unsuccessfully；
4) a kind of valve actuator load life test device that the present invention provides is due to employing multi-disc friction piece and rotation
The laminating friction of disk is so that be delivered to the moment of torsion of each point in rotary shaft uniformly, rotary shaft slow-roll stabilization is so that test process becomes
Smooth-going, safety.
5) in currently preferred technical scheme, the material of rotation dish adopts cuprio, and the material of friction plate is using casting
Ferrum, so, can make rotation dish produce more preferable friction effect with friction plate, its respective service life also can be ensured.
6) in currently preferred technical scheme, hydraulic system adopts slim servo hydraulic cylinder, then can make entirely originally
Invention provide device is compacter, pushing tow when also can make friction plate more preferably, more uniformly stress.
In sum:
The present invention provide a kind of valve actuator load life test device is reasonable in design, compact conformation, Operation and Maintenance side
Just, when temperature and other external conditions change, still load regulation and control can be carried out by the pressure of hydraulic system for lifting, make output torque
It is consistent for a long time so that the moment of torsion exporting becomes adjustable controlled, versatility, the suitability significantly increase, great popularization and application valency
Value.
Finally it is necessary to illustrate:
The above is only used for help and understands technical scheme it is impossible to be interpreted as limiting the scope of the invention；
Those skilled in the art improve according to the non-intrinsically safe that the above of the present invention is made and adjust, and all belong to of the presently claimed invention
Protection domain.
Claims (6)
1. a kind of valve actuator load life test device it is characterised in that: include frame, rotating mechanism and load machine
Structure；
Described frame includes the pillar (13) of top board (11), base plate (12) and more than three；Pillar (13) is supported on top board (11)
It is allowed to be formed a machine cavity and base plate (13) between, top board (11) is also covered with one piece of bread board for disposing actuator
(14)；
Described rotating mechanism includes rotary shaft (21), rotation dish (22) and bearing (23)；Rotary shaft (21) is arranged on top board (11)
And base plate (12) central authorities two bearings (23) in and upper end passes top board (11) and installing plate (14), more than one piece of rotation dish
(22) rotary shaft (21) being horizontally arranged in machine cavity is upper and can rotate with it；
Described load maintainer includes friction plate (31) and hydraulic system (32)；The through hole that has on friction plate (31) simultaneously passes through through hole
It is sleeved on pillar (12), each setting in lower section of each rotation dish (22) is a piece of, the set with being enclosed within pillar (12) between every
Ring (15) separates；Hydraulic system (32) is arranged on base plate (12) above and its push rod (33) withstands on the friction plate (32) of bottom,
By the pushing tow of push rod (33), it can be made to be close to rotation dish (22) upwards and pass through the collar (15) by a upper friction plate (31) upwards
Pushing tow is close to rotation dish (22) thereon；
When rotation dish (22) rotates, can produce with the rotation dish (22) being each close to and rub and pass through rotary shaft (21) and will rub
Wiping power is changed into moment of torsion, for the load life test of valve actuator.
2. as claimed in claim 1 a kind of valve actuator load life test device it is characterised in that: described rotation
Disk (22) is 2～10 pieces.
3. as claimed in claim 1 a kind of valve actuator load life test device it is characterised in that: described rotation
Disk (22) its material is cuprio.
4. as claimed in claim 1 a kind of valve actuator load life test device it is characterised in that: described friction
Piece (31) its material is cast iron.
5. as claimed in claim 1 a kind of valve actuator load life test device it is characterised in that: described hydraulic pressure
System (32) adopts slim servo hydraulic cylinder.
6. in a kind of Claims 1 to 5 the valve actuator load life test device described in any one using method,
It is characterized in that, comprise the steps:
A) tested valve actuator is installed on bread board (14) and its rotating shaft is fixedly connected with described rotary shaft (21)；
B) start described hydraulic system 32 so as to the pressure of output reaches the numerical value required for detection and keeps this output；
C) start described valve actuator so as to rotating shaft drives described rotary shaft (21) to rotate, carry out described valve execution
The load life test of mechanism；
D) to adjustment test moment of torsion, can be carried out by adjusting described hydraulic system (32) output pressure when shutting down or being online；
E) it is completed, is operated by the inverse process of above-mentioned steps, first close down described valve actuator, unload
Described hydraulic system (32) and then pull down tested valve actuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610924434.XA CN106370413A (en) | 2016-10-24 | 2016-10-24 | Testing apparatus for service life of load of valve execution mechanism and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610924434.XA CN106370413A (en) | 2016-10-24 | 2016-10-24 | Testing apparatus for service life of load of valve execution mechanism and using method thereof |
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| Publication Number | Publication Date |
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| CN106370413A true CN106370413A (en) | 2017-02-01 |
Family
ID=57895870
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610924434.XA Pending CN106370413A (en) | 2016-10-24 | 2016-10-24 | Testing apparatus for service life of load of valve execution mechanism and using method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387850A (en) * | 2017-07-05 | 2017-11-24 | 天津吉秝机电设备有限公司 | A kind of overload protective device for Valve controlling |
| CN109520723A (en) * | 2018-12-24 | 2019-03-26 | 中国船舶重工集团公司第七〇九研究所 | Underwater gate valve load simulating device and underwater gate valve executing agency test method |
| CN110426188A (en) * | 2019-06-28 | 2019-11-08 | 武汉船用机械有限责任公司 | Load testing tooling |
| CN110579343A (en) * | 2019-07-30 | 2019-12-17 | 浙江省泵阀产品质量检验中心（永嘉县质量技术监督检测研究院） | linear valve electric actuator comprehensive testing device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120066292A (en) * | 2010-12-14 | 2012-06-22 | 한국세라믹기술원 | Lifetime testing apparatus of a ceramic disk for water valve |
| CN203849009U (en) * | 2014-03-14 | 2014-09-24 | 杨卫中 | A valve electric apparatus usage life test stand |
| CN204027813U (en) * | 2014-07-30 | 2014-12-17 | 天津百利二通机械有限公司 | Electric device for valve life test rack structure |
| CN204831777U (en) * | 2015-08-18 | 2015-12-02 | 浙江省泵阀产品质量检验中心 | Valve final controlling element's life test machine |
| CN204903155U (en) * | 2015-08-28 | 2015-12-23 | 山东中联泵业有限公司 | Valve electric actuator torsion -testing test bench |
| CN105424274A (en) * | 2015-12-16 | 2016-03-23 | 常州电站辅机总厂有限公司 | Novel electric valve actuator delivery test frictional loading device |
| CN206161301U (en) * | 2016-10-24 | 2017-05-10 | 特福隆（上海）科技有限公司 | Valve actuating mechanism load life testing arrangement |
-
2016
- 2016-10-24 CN CN201610924434.XA patent/CN106370413A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120066292A (en) * | 2010-12-14 | 2012-06-22 | 한국세라믹기술원 | Lifetime testing apparatus of a ceramic disk for water valve |
| CN203849009U (en) * | 2014-03-14 | 2014-09-24 | 杨卫中 | A valve electric apparatus usage life test stand |
| CN204027813U (en) * | 2014-07-30 | 2014-12-17 | 天津百利二通机械有限公司 | Electric device for valve life test rack structure |
| CN204831777U (en) * | 2015-08-18 | 2015-12-02 | 浙江省泵阀产品质量检验中心 | Valve final controlling element's life test machine |
| CN204903155U (en) * | 2015-08-28 | 2015-12-23 | 山东中联泵业有限公司 | Valve electric actuator torsion -testing test bench |
| CN105424274A (en) * | 2015-12-16 | 2016-03-23 | 常州电站辅机总厂有限公司 | Novel electric valve actuator delivery test frictional loading device |
| CN206161301U (en) * | 2016-10-24 | 2017-05-10 | 特福隆（上海）科技有限公司 | Valve actuating mechanism load life testing arrangement |
Non-Patent Citations (1)
| Title |
|---|
| 姜迎新等: "智能型阀门电动装置寿命试验系统", 《数字技术与应用》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387850A (en) * | 2017-07-05 | 2017-11-24 | 天津吉秝机电设备有限公司 | A kind of overload protective device for Valve controlling |
| CN107387850B (en) * | 2017-07-05 | 2023-12-22 | 天津吉秝机电设备有限公司 | Overload protector for valve control |
| CN109520723A (en) * | 2018-12-24 | 2019-03-26 | 中国船舶重工集团公司第七〇九研究所 | Underwater gate valve load simulating device and underwater gate valve executing agency test method |
| CN109520723B (en) * | 2018-12-24 | 2023-11-21 | 中国船舶重工集团公司第七一九研究所 | Underwater gate valve load simulation device and underwater gate valve executing mechanism test method |
| CN110426188A (en) * | 2019-06-28 | 2019-11-08 | 武汉船用机械有限责任公司 | Load testing tooling |
| CN110426188B (en) * | 2019-06-28 | 2021-06-01 | 武汉船用机械有限责任公司 | Load testing tool |
| CN110579343A (en) * | 2019-07-30 | 2019-12-17 | 浙江省泵阀产品质量检验中心（永嘉县质量技术监督检测研究院） | linear valve electric actuator comprehensive testing device |
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Application publication date: 20170201 |
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