CN201237549Y - Automatic testing bench for valve used in hydraulic support - Google Patents
Automatic testing bench for valve used in hydraulic support Download PDFInfo
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- CN201237549Y CN201237549Y CNU2008200237731U CN200820023773U CN201237549Y CN 201237549 Y CN201237549 Y CN 201237549Y CN U2008200237731 U CNU2008200237731 U CN U2008200237731U CN 200820023773 U CN200820023773 U CN 200820023773U CN 201237549 Y CN201237549 Y CN 201237549Y
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- hydraulic pump
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- 238000012360 testing method Methods 0.000 title claims abstract description 137
- 239000002828 fuel tank Substances 0.000 claims abstract description 19
- 230000002457 bidirectional effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 description 34
- 238000000034 method Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model discloses an automation test bed of a hydraulic support valve; an outlet of a hydraulic pump is provided with parallel installed P, A, and B test ports; electromagnetic valves are arranged respectively between the hydraulic pump and A test port and between the hydraulic pump and B test port; a hydraulic cylinder is connected between the A and B test ports; stop valves are arranged respectively between the hydraulic cylinder and the A test port and between the hydraulic cylinder and the B test port ; a T test port is arranged and is connected with a fuel tank through a relief valve; a sensor is arranged on each test port, which is connected with a computer for both testing the valve applied to the hydraulic support and testing an upright post, a jack and various hydraulic accessories on the support.
Description
One, technical field
The utility model relates to a kind of test unit, is specially a kind of the valve for roof support robotization testing table.
Two, background technology
China's coal-mine coal-face major part is a fully mechanized coal face at present, and the support apparatus of use is a hydraulic support.Because the hydraulic support environment for use is very abominable, the life cycle of the valve for roof support is long three months, short only several weeks.The dependence test standard-required is pressed in the essential gug reparation of these hydraulic valves because of the medium pollution wear out failure, just can go into the well after the hydraulic part after repairing has only the process detection qualified and shelve use.
There are many shortcomings in support maintenance depot and support with the hydraulic valve checkout equipment that valve factory uses at present: the experimental liquid pressing system is uncomprehensive by the loop of regulation among the coal industry standard MT419-1995 of the People's Republic of China (PRC) " the valve for roof support ", pilot project and standard are not inconsistent, and can't judge the validity of test findings; Can only be to the partial function and the Performance Detection of part valve; Process of the test all by laboratory technician control, can't effectively be supervised, and is random big, can not guarantee that all gainers all do experiment, and the dwell time also can't guarantee, test figure is manual makes a copy of, and confidence level is poor, and test figure is unfavorable for management.The test pressure major part is shown that by stem-winder because the tensimeter range is big, pressure reduction and pressure drop resolution are low; The test form is lack of standardization, does not meet standard-required.
Three, summary of the invention
The utility model provides a kind of precision height, the general the valve for roof support robotization testing table of many valves at above weak point.
The technical scheme that its technical matters that solves the utility model adopts is:
A kind of the valve for roof support robotization testing table comprises fuel tank, hydraulic pump, retaining valve, stop valve, surplus valve, solenoid valve; Hydraulic pump is connected with fuel tank, and the hydraulic pressure delivery side of pump is provided with P, A, B test port in parallel; Hydraulic pump and P test port are provided with solenoid valve connected in series successively and retaining valve, and this retaining valve inlet is connected with solenoid valve, export and is connected P test mouth, control end connection solenoid valve, solenoid valve other end connection hydraulic pump; Respectively be provided with a solenoid valve between A, B test port and hydraulic pump; Be connected with hydraulic cylinder between A, B test port, be respectively equipped with stop valve between this hydraulic cylinder and A, B test port; Be provided with the T test port, it is connected with fuel tank by surplus valve, and each test port is provided with pressure transducer, and pressure transducer is connected with computing machine.
Above-mentioned a kind of the valve for roof support robotization testing table: be provided with solenoid valve, outlet is connected this solenoid valve one end with hydraulic pump with test port, and the other end connects surplus valve.
The test port P mouth that is provided with, A mouth, B mouth and T mouth can be selected different connected modes according to different pet valves; Stop valve that is provided with and solenoid valve can be realized the loop that test is required according to the connected mode of the different tests object in when test; Pressure transducer is connected with computing machine, and computing machine writes down the pressure change procedure of sensor automatically, has solved the shortcoming of hand-kept confidence level difference.
Above-mentioned a kind of the valve for roof support robotization testing table is provided with pressurized cylinder and is the bidirectional booster cylinder between hydraulic pump and test port P, A in parallel, B.
The bidirectional booster cylinder reaches required effective pressure in the time of can realizing valve tested.
For the pressure compensation of realizing the loop and the function of temperature compensation, above-mentioned a kind of the valve for roof support robotization testing table is provided with flow speed control valve between hydraulic cylinder and hydraulic pump.
Above-mentioned a kind of the valve for roof support robotization testing table, place, hydraulic pump exit position is provided with solenoid valve in parallel with it and surplus valve, and this solenoid valve is connected fuel tank with the surplus valve other end; Be provided with the solenoid valve and the surplus valve of connecting successively between the pressure control mouth of this surplus valve and fuel tank.
Above-mentioned a kind of the valve for roof support robotization testing table, hydraulic pump outlet and P test port place are provided with tensimeter.
Solenoid valve that is provided with and surplus valve can be adjusted pressure in the test loop according to subjects, reach the required pressure of test, make test more accurate, convenient.
Four, description of drawings
Fig. 1 is a structural representation of the present utility model.
Five, embodiment
The following correlation technique content of not addressing all can adopt or use for reference prior art, and a kind of as shown in Figure 1 the valve for roof support robotization testing table comprises fuel tank, hydraulic pump 2, retaining valve 12, stop valve 14, surplus valve 7, solenoid valve 17; Hydraulic pump 2 is connected with fuel tank, and the outlet of hydraulic pump 2 is provided with P, A, B test port in parallel; Hydraulic pump 2 is provided with solenoid valve 17-2 connected in series successively and retaining valve 12-5 with the P test port, this retaining valve 12-5 inlet is connected with solenoid valve 17-2, export and is connected P test mouth, control end connection solenoid valve 17-1, solenoid valve 17-1 other end connection hydraulic pump 2; A, B test port and 2 of hydraulic pumps respectively are provided with a solenoid valve 17-3,17-4; Be connected with hydraulic cylinder 16 between A, B test port, be respectively equipped with stop valve 14-4,14-5 between this hydraulic cylinder 16 and A, B test port; Be provided with the T test port, it is connected with fuel tank by surplus valve 7-3, and each test port is provided with pressure transducer 20-1 and tensimeter 15-1, and pressure transducer 20-1 is connected with computing machine.
Be provided with solenoid valve 17-9,2 outlets are connected the one end with hydraulic pump with test port, and the other end connects surplus valve 7-4.
Be provided with bidirectional booster cylinder 13 between hydraulic pump 2 and test port P, A in parallel, B, bidirectional booster cylinder 13 is connected with test port by retaining valve 12-1,12-2,12-3,12-4.
Between bidirectional booster cylinder 13 and hydraulic pump 2, be provided with flow speed control valve 9, with flow speed control valve 9 and be provided with surplus valve 10.
Place, hydraulic pump 2 exit positions is provided with solenoid valve 17-6 in parallel with it and surplus valve 7-1, and this solenoid valve 17-6 is connected fuel tank with the surplus valve 7-1 other end; Be provided with solenoid valve 17-5 and the surplus valve 7-2 that connects successively between the oil pressure relief of this surplus valve 7-1 control mouthful and fuel tank.
Hydraulic circuit is provided with tensimeter 15-5.
Be provided with solenoid valve 17-7 and solenoid valve 17-8, the end of solenoid valve 17-7 connects the 13-1 mouth of bidirectional booster cylinder 13, the outlet that an end connects flow speed control valve 9; Solenoid valve 17-8 connects the 13-2 mouth of bidirectional booster cylinder 13, the outlet that an end connects flow speed control valve 9.
Be provided with stop valve 14-1 between test port A mouth and the solenoid valve 17-3, be provided with hydraulic control one-way valve 12-6, its outlet connects hydraulic cylinder 16, inlet connects fuel tank, the hydraulic control end connects stop valve 14-1 and solenoid valve 17-3, in like manner be provided with stop valve 14-2 and pilot operated valve device 12-7, and on the control end of hydraulic control one-way valve 12-7, be provided with stop valve 14-6 at test port B place; Be provided with stop valve 14-3 at test port B place, the one end communicates with test port B end.
(1) safety valve test: the liquid in-out mouth of tested safety valve links to each other with P, B mouth respectively.Close stop valve 14-6,14-5,14-2, open stop valve 14-3.
(a) low discharge open and shut characteristic test: open hydraulic pump, it is electric that solenoid valve 17-6 is got, and it is more than 1.2 times of tested safety valve nominal pressure that adjusting surplus valve 7-1 makes tensimeter 15-5 pressure.Solenoid valve 17-2 gets electric, regulates tested safety valve and makes it overflow, measures spillway discharge with measuring cup from stop valve 14-3 outlet, and it is 40mL/min that adjusting flow speed control valve 9 makes spillway discharge.Regulating the displayed value that tested safety valve makes tensimeter 15-1 again is tested safety valve nominal pressure, and 17-2 dead electricity 17-1 gets the electric pressure of laying down safety valve.17-1 dead electricity 17-2 gets the electric safety valve topping up of giving, and pressure rises to the safety valve overflow, and 17-2 dead electricity behind the overflow 3min is cut off feed flow, and is stable to manometric displayed value, the process that computer recording pressure transducer 20-1 pressure changes.
(b) high pressure sealing test: 17-5 gets electric, and it is 90% of safety valve nominal pressure that adjusting 7-2 makes the 15-5 displayed value.Solenoid valve 17-2 gets electric, and to tested valve topping up, pressure does not increase back 17-2 dead electricity, cuts off feed flow, and pressurize 2min after the pressure stability is treated in the off-load of 17-6 dead electricity hydraulic pump.Computer recording pressure transducer 20-1 pressure decline process.17-1 gets electric, lays down the pressure of safety valve.
(c) low pressure seal test: the 17-5 dead electricity, 17-6 gets electric, and 17-9 gets electric, and it is 2MPa that adjusting 7-4 makes the 15-5 displayed value.Solenoid valve 17-2 gets electric, and to tested valve topping up, pressure does not increase back 17-2 dead electricity, cuts off feed flow, and pressurize 2min after the pressure stability is treated in the off-load of 17-6 dead electricity hydraulic pump.Computer recording pressure transducer 20-1 pressure decline process.17-1 gets electric, lays down the pressure of safety valve.
(d) strength test: tested safety valve transferred extremely make it can not overflow, the 17-5 dead electricity, 17-6 gets, make system's supercharging, regulate 7-1 and make pressure be transferred to 1.5 times of safety valve nominal pressure, 17-2 gets the electric tested valve topping up of giving, treat 17-2 dead electricity pressurize after the pressure stability, voltage stabilizing 2min, record pressure descends.
After the off-test, the Computer Processing test figure forms test report automatically.The operator unloads tested safety valve, refills another tested valve and continues test by above step.
(2) hydraulic control one-way valve test: the forward liquid in-out mouth of tested hydraulic control one-way valve links to each other with P, B, A mouth respectively with the control mouth.Close stop valve 14-4,14-5,14-3, open stop valve 14-1,14-2.
(a) opening pressure is measured: open hydraulic pump, it is electric that solenoid valve 17-9,17-6 are got, and it is 2MPa that adjusting surplus valve 7-4 makes tensimeter 15-5 pressure.Solenoid valve 17-1,17-4 get electric, to making tested valve forward open the maximal value of computer recording pressure transducer 20-1 pressure.
(b) start or stop piezometry: it is electric that solenoid valve 17-5,17-6 are got, and it is tested nominal pressure that adjusting surplus valve 7-2 makes tensimeter 15-5 pressure.Solenoid valve 17-4 gets electric, to tested valve forward is opened, treat that tensimeter 15-1 is stable after, solenoid valve 17-4 dead electricity, computer recording pressure transducer 20-1 force value.
(c) mensuration of controlled pressure: it is electric that solenoid valve 17-5,17-6 are got, and 7-2 is adjusted to minimum with surplus valve, and solenoid valve 17-3 gets electric, slowly transfers big surplus valve 7-2, when 15-1 reduces to 0, and computer recording pressure transducer 20-1 force value.
(d) high pressure sealing test: 17-5 gets, the 17-6 electricity, and it is tested valve nominal pressure that adjusting 7-2 makes the 15-5 displayed value.Solenoid valve 17-2 gets electric, and to the reverse topping up of tested valve, pressure does not increase back 17-2 dead electricity, cuts off feed flow, and pressurize 2min after the pressure stability is treated in the off-load of 17-6 dead electricity hydraulic pump.Computer recording pressure transducer 20-1 pressure decline process.17-1 gets electric, lays down the pressure of safety valve.
(e) low pressure seal test: the 17-5 dead electricity, 17-6 gets electric, and 17-9 gets electric, and it is 2MPa that adjusting 7-4 makes the 15-5 displayed value.Solenoid valve 17-2 gets electric, and to the reverse topping up of tested valve, pressure does not increase back 17-2 dead electricity, cuts off feed flow, and pressurize 2min after the pressure stability is treated in the off-load of 17-6 dead electricity hydraulic pump.Computer recording pressure transducer 20-1 pressure descends.17-1 gets electric, lays down the pressure of safety valve.
After the off-test, the Computer Processing test figure forms test report automatically.The operator will be unloaded by valve, refill another tested valve and continue test by above step.
(3) reversal valve test: the liquid return hole that advances of tested reversal valve links to each other with P, T mouth respectively, and two working fluid mouths link to each other with A, B mouth respectively.Close stop valve 14-1,14-2,14-3, open stop valve 14-4,14-5.
(a) commutation ability test: open hydraulic pump, it is electric that solenoid valve 17-5,17-6 are got, and it is tested valve nominal pressure that adjusting surplus valve 7-2 makes tensimeter 15-5 pressure.Whether normal solenoid valve 17-2 gets electric, presses for tested valve feed flow, operates the handle of tested valve, regulates surplus valve 7-3, makes hydraulic cylinder 16 motions freely, and whether the tested valve events of observed and recorded is flexible, open, close situations such as.
(b) leakage test: the 17-5 dead electricity, 17-6 gets electric, and 17-9 gets electric, and it is 2MPa that adjusting 7-4 makes the 15-5 displayed value, and 7-3 is transferred to minimum with surplus valve.Solenoid valve 17-2 gets electric, does not increase back 17-2 dead electricity for tested valve feed flow, pressure, cuts off feed flow, and pressurize 2min after the pressure stability is treated in the off-load of 17-6 dead electricity hydraulic pump.Computer recording pressure transducer 20-1 pressure descends.
Operate the handle of tested valve, P mouth, A mouth are communicated, hydraulic cylinder 16 moves to terminal point when motionless, 17-4 gets the electric hydraulic control one-way valve 12-7 that opens, hydraulic cylinder 16 right chambeies are communicated with fuel tank, and pressure does not increase back 17-2 dead electricity, cuts off feed flow, pressurize 2min after the pressure stability is treated in the off-load of 17-6 dead electricity hydraulic pump.Computer recording pressure transducer 20-1 pressure descends.
Operate the handle of tested valve, P mouth, B mouth are communicated, hydraulic cylinder 16 moves to terminal point when motionless, 17-3 gets the electric hydraulic control one-way valve 12-6 that opens, hydraulic cylinder 16 left chambeies are communicated with fuel tank, and pressure does not increase back 17-2 dead electricity, cuts off feed flow, pressurize 2min after the pressure stability is treated in the off-load of 17-6 dead electricity hydraulic pump.Computer recording pressure transducer 20-1 pressure descends.
After the off-test, the Computer Processing test figure forms test report automatically.The operator will be unloaded by valve, refill another tested valve and continue test by above step.
(4) stop valve test: the forward liquid in-out mouth of tested stop valve links to each other with P, B mouth respectively.Close stop valve 14-2,14-5, open stop valve 14-3.
(a) high pressure sealing test: 17-5 gets electric, and it is tested valve nominal pressure that adjusting 7-2 makes the 15-5 displayed value.Solenoid valve 17-2 gets electric, and to tested valve forward topping up, pressure does not increase back 17-2 dead electricity, cuts off feed flow, and pressurize 2min after the pressure stability is treated in the off-load of 17-6 dead electricity hydraulic pump.Computer recording pressure transducer 20-1 pressure descends.17-1 gets electric, lays down the pressure of tested valve.
(b) low pressure seal test: the 17-5 dead electricity, 17-6 gets electric, and 17-9 gets electric, and it is 2MPa that adjusting 7-4 makes the 15-5 displayed value.Solenoid valve 17-2 gets electric, and to tested valve forward topping up, pressure does not increase back 17-2 dead electricity, cuts off feed flow, and pressurize 2min after the pressure stability is treated in the off-load of 17-6 dead electricity hydraulic pump.Computer recording pressure transducer 20-1 pressure descends.17-1 gets electric, lays down the pressure of tested valve.
After the off-test, the Computer Processing test figure forms test report automatically.The operator will be unloaded by valve, refill another tested valve and continue test by above step.
(5) column and lifting jack test: two high pressure flexible pipes of hydraulic cylinder 16 are unloaded, link to each other with the liquid in-out mouth of tested column or lifting jack respectively, P, A mouth are linked to each other with flexible pipe.Close stop valve 14-1,14-3,14-6, open stop valve 14-2,14-4,14-5.
(a) stroke demonstration test: open hydraulic pump, it is electric that solenoid valve 17-5,17-6 are got, and it is by the nominal pressure of test specimen that adjusting surplus valve 7-2 makes tensimeter 15-5 pressure.Solenoid valve 17-2 gets electric, and the 17-4 dead electricity is moved to terminal point when motionless by test specimen, measures with a yardstick and gets by test specimen total length L 1.Solenoid valve 17-4 gets electric, and the 17-2 dead electricity is moved to terminal point when motionless by test specimen, measures with a yardstick and gets by test specimen total length L 2.L1, L2 are input to computing machine, calculate by the stroke L2-L1 of test specimen.
(b) high pressure sealing test: adjusting by the test specimen stroke baffle is 1/4,2/4,3/4 and the total kilometres place, regulates surplus valve 7-2 and makes tensimeter 15-5 pressure for by the nominal pressure of test specimen.Solenoid valve 17-2 gets electric, and the 17-4 dead electricity is moved to stroke baffle by test specimen, and after tensimeter 15-1 pressure no longer rose, solenoid valve 17-2 dead electricity was cut off feed flow, and pressurize 2min after the pressure stability is treated in the off-load of 17-6 dead electricity hydraulic pump.Computer recording pressure transducer 20-1 pressure descends.17-1 gets electric, lays down by the pressure of test specimen.
(c) low pressure seal test: 17-9 gets electric, and it is 2MPa that adjusting surplus valve 7-4 makes tensimeter 15-5 pressure.Ensuing process of the test is identical in the high pressure sealing test.
After the off-test, the Computer Processing test figure forms test report automatically.The operator unloads tested column or lifting jack, refills another tested column or lifting jack and continues test by above step.
Computer measurement and control system is made up of industrial control computer, analog acquisition AI plate, digital quantity output DO plate, relay terminal plate and TT﹠C software.Set the process of the test parameter earlier, software is moved different program modules according to what choose by the test specimen type then, and all kinds of valves are carried out delivery test.Computing machine sends the DO signal of control electromagnetic valve by the process of the test parameter of test sequential and setting, gathers the pressure signal of corresponding pressure transducer simultaneously, generates test report after the off-test automatically, and with the test figure storage, is provided with back inquiry and management.
Claims (6)
1, a kind of the valve for roof support robotization testing table is characterized in that: comprise fuel tank, hydraulic pump (2), retaining valve (12), stop valve (14), surplus valve (7), solenoid valve (17); Hydraulic pump (2) is connected with fuel tank, and the outlet of hydraulic pump (2) is provided with P, A, B test port in parallel; Hydraulic pump (2) is provided with solenoid valve connected in series successively (17-2) and retaining valve (12-5) with the P test port, this retaining valve (12-5) inlet is connected with solenoid valve (17-2), export and is connected P test mouth, control end connection solenoid valve (17-1), solenoid valve (17-1) other end connection hydraulic pump (2); Respectively be provided with a solenoid valve (17-3,17-4) between A, B test port and hydraulic pump (2); Be connected with hydraulic cylinder (16) between A, B test port, be respectively equipped with stop valve (14-4,14-5) between this hydraulic cylinder (16) and A, B test port; Be provided with the T test port, it is connected with fuel tank by surplus valve (7-3), and each test port is provided with pressure transducer (20-1), and pressure transducer (20-1) is connected with computing machine.
2, a kind of the valve for roof support robotization testing table according to claim 1 is characterized in that: be provided with solenoid valve (17-9), outlet is connected the one end with hydraulic pump (2) with test port, and the other end connects surplus valve (7-4).
3, a kind of the valve for roof support robotization testing table according to claim 1 is characterized in that: be provided with pressurized cylinder (13) between hydraulic pump (2) and test port P, A in parallel, B.
4, a kind of the valve for roof support robotization testing table according to claim 3, it is characterized in that: described pressurized cylinder (13) is the bidirectional booster cylinder.
5, a kind of the valve for roof support robotization testing table according to claim 4 is characterized in that: be provided with flow speed control valve (9) between bidirectional booster cylinder (13) and hydraulic pump (2).
6, a kind of the valve for roof support robotization testing table according to claim 1, it is characterized in that: place, hydraulic pump (2) exit position is provided with solenoid valve in parallel with it (17-6) and surplus valve (7-1), and this solenoid valve (17-6) is connected fuel tank with surplus valve (7-1) other end; Be provided with the solenoid valve (17-5) and the surplus valve (7-2) of connecting successively between the oil pressure relief of this surplus valve (7-1) control mouthful and fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200237731U CN201237549Y (en) | 2008-06-06 | 2008-06-06 | Automatic testing bench for valve used in hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200237731U CN201237549Y (en) | 2008-06-06 | 2008-06-06 | Automatic testing bench for valve used in hydraulic support |
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| Publication Number | Publication Date |
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| CN201237549Y true CN201237549Y (en) | 2009-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200237731U Expired - Fee Related CN201237549Y (en) | 2008-06-06 | 2008-06-06 | Automatic testing bench for valve used in hydraulic support |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213635A (en) * | 2011-05-06 | 2011-10-12 | 三一重机有限公司 | Testing system for main valve leakage of hydraulic excavator |
| CN102435431A (en) * | 2011-11-16 | 2012-05-02 | 宁波长壁流体动力科技有限公司 | Comprehensive test platform for valve used for mining hydraulic bracket |
| CN102735439A (en) * | 2012-07-05 | 2012-10-17 | 徐工集团工程机械股份有限公司 | Device for testing performance of hydraulic multiway valve |
| CN105041780A (en) * | 2015-06-24 | 2015-11-11 | 上海大学 | Hydraulic test system device for down-hole packer |
-
2008
- 2008-06-06 CN CNU2008200237731U patent/CN201237549Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213635A (en) * | 2011-05-06 | 2011-10-12 | 三一重机有限公司 | Testing system for main valve leakage of hydraulic excavator |
| CN102213635B (en) * | 2011-05-06 | 2013-06-12 | 三一重机有限公司 | Testing system for main valve leakage of hydraulic excavator |
| CN102435431A (en) * | 2011-11-16 | 2012-05-02 | 宁波长壁流体动力科技有限公司 | Comprehensive test platform for valve used for mining hydraulic bracket |
| CN102435431B (en) * | 2011-11-16 | 2014-04-02 | 宁波长壁流体动力科技有限公司 | Comprehensive test platform for valve used for mining hydraulic bracket |
| CN102735439A (en) * | 2012-07-05 | 2012-10-17 | 徐工集团工程机械股份有限公司 | Device for testing performance of hydraulic multiway valve |
| CN102735439B (en) * | 2012-07-05 | 2014-11-19 | 徐工集团工程机械股份有限公司 | Device for testing performance of hydraulic multiway valve |
| CN105041780A (en) * | 2015-06-24 | 2015-11-11 | 上海大学 | Hydraulic test system device for down-hole packer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANDONG VICTEUR HYDRAULIC CONTROL TECHNOLOGY CO., Free format text: FORMER OWNER: ZHOU LIANFU Effective date: 20140807 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140807 Address after: 271000 Shandong city of Tai'an province high tech Zone with the middle of the Street northbound Tianmen Patentee after: Shandong Victeur Hydraulic Control Technology Co., Ltd. Address before: 271000 Tai'an Shandong hi tech Innovation Service Center Sean Covey Kurt electromechanical Co., Ltd. Patentee before: Zhou Lianfu |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090513 Termination date: 20150606 |
|
| EXPY | Termination of patent right or utility model |