CN202101830U - Mobile hydraulic oil cylinder leak tester - Google Patents
Mobile hydraulic oil cylinder leak tester Download PDFInfo
- Publication number
- CN202101830U CN202101830U CN2011201849883U CN201120184988U CN202101830U CN 202101830 U CN202101830 U CN 202101830U CN 2011201849883 U CN2011201849883 U CN 2011201849883U CN 201120184988 U CN201120184988 U CN 201120184988U CN 202101830 U CN202101830 U CN 202101830U
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- valve
- leak tester
- fuel tank
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a mobile hydraulic oil cylinder leak tester, which comprises a quick coupling butted with an oil cylinder cavity to be detected. The quick coupling comprises a pressure-proof hose; however, the leak tester comprises an oil tank and wheel tools of the oil tank as well as a machine part linked with the oil tank; the linked machine part comprises an electric contact pressure detecting gauge, a control circuit electrically connected with a signal output end of the electric contact pressure detecting gauge, and an electric oil pump, a control valve and a detecting system which are communicated with the oil tank in sequence, wherein the electric oil pump is electrically connected with the control circuit, the control valve is mutually communicated with the inlet of the electric contact pressure gauge, and the detecting system is connected with the outlet of the control valve; the detecting system comprises a hydraulic lock, a pressure gauge and the pressure-proof hose, which are communicated in sequence, wherein the pressure-proof hose of one of a normally-closed type pressure release valve and the quick coupling is mutually communicated with the inlet of the pressure gauge; and the oil tank is provided with a direct or indirect channel communicated with the outlet of the pressure release valve and another pressure-proof hose of the quick coupling. By adopting the mobile hydraulic oil cylinder leak tester, the leak testing of the hydraulic oil cylinder online-used can be performed in a mobile, quick, exact, safe and environmentally-friendly manner, so that the judging and maintaining efficiency on the fault of the hydraulic system is increased.
Description
Technical field
The utility model relates to the maintenance pick-up unit, and more particularly, the utility model relates to a kind of maintenance pick-up unit of hydraulic jack.
Background technology
Along with development of science and technology, industry, building and even civil area all adopt hydraulically operated equipment (HOE) widely, comprise that modern metallurgical machinery has also all used hydraulic transmission equipment in a large number.And various oil cylinder specifications and use occasion are also all different in the different hydraulic transmission equipments, and wherein, the quantity of single hydraulic jack is just very big.
Because various factors influence; The length in serviceable life of hydraulic jack differs, and after use a period of time, hydraulic system all such-and-such different faults can occur; In case hydraulic fault appears in hydraulic system, being difficult to accurate failure judgement reason for the moment usually is at hydraulic jack or other position of system.At present; The judgement of failure cause and definite main experience with the staff; Or combine to utilize the pressure oil of system itself earlier hydraulic jack tentatively to be judged promptly: original oil pipe in dismounting oil cylinder two chambeies or together with cylinder body dismounting together, then to the oil cylinder chamber of the dismantling oil pipe fuel feeding that pressurizes, observe the oil spout state in another chamber; Judge whether leakage failure of seized oil cylinder with this, search thereby the system failure positioned.Obviously; These traditional detection method can not quantitatively show pressure in the cavity, the have no way of pressure differential in comparison two chambeies more; Therefore often cause fault judgement inaccurate; It is low to have influence on whole detection maintenance efficiency, also can cause a large amount of the detection with fluid loss waste, increases the unnecessary consumption of fluid and the severe contamination of environment.
Summary of the invention
Above-mentioned shortcoming to prior art; The purpose of the utility model is that a kind of mobile hydraulic oil cylinder leak tester will be provided; It has following advantage: can move, fast, accurately, safety, environmental protection ground carries out Leak Detection for the hydraulic jack of online use, improves judgement and maintenance efficiency to hydraulic system fault.
For this reason; The technical solution of the utility model is a kind of mobile hydraulic oil cylinder leak tester; It comprises the rapid-acting coupling of docking with oil cylinder chamber to be checked; Rapid-acting coupling comprise in regular turn the thread end that is connected with hydraulic jack to be checked, soon connect male member, connect recessed, pressure hose soon; And said leak tester comprise fuel tank and wheel thereof, with the parts of fuel tank interlock, transmission comprises: electric contact pressure gauge and the control circuit that is connected electrically in its signal output part, and be communicated with successively with fuel tank: be electrically connected the electric oil pump of said control circuit, with the operation valve of electric contact pressure gauge import intercommunication, be connected the detection system of operation valve outlet; This detection system comprises in regular turn the pressure hose of one of often-cutting type blowdown valve and said rapid-acting coupling of the hydraulic lock, tensimeter and the import intercommunication with it that are communicated with; Said fuel tank is provided with the direct or indirect passage that is communicated with blowdown valve outlet and another rapid-acting coupling pressure hose.
The leak tester of the utility model; Employing has the fuel tank of wheel, and on fuel tank interlock install to oil cylinder to be measured specify electric oil pump, operation valve, the control pressurising limit of cavity pressurising electric contact pressure gauge and oil pump control circuit, prevent oil pressure in the pressurising cavity always oil-piping return the hydraulic lock of letting out, in order to the rapid-acting coupling of observing tensimeter that the pressurising chamber pressure changes, butt joint oil cylinder two-chamber, detect in to pressure hose, the inspection of another rapid-acting coupling of fuel tank backflow draining the finish blowdown valve and the outlet thereof of in fuel tank backflow cavity excess oil; Therefore; Whole parts of the utility model can both be in company with fuel tank together; Rapidly move to and break down and the hydraulic system and the oil cylinder whereabouts thereof of the online detection of needs; From move fuel tank, pump and detect, squeeze into a certain cavity of oil cylinder to be checked through hydraulic lock and pressure hose again, under the enough sufficient pressure limit that oil pump control circuit and electric contact pressure gauge are set, guarantee that with often-cutting type blowdown valve and hydraulic lock oil pressure maintains unlikely bleeder in the cavity with oil; Under this abundant reliable detection condition; To being carried out adequately sustained pressurize, the adequately sustained dwell time, help observing the various different variations of cavity internal pressure to be checked with tensimeter accurate quantification ground by the oiling cavity; Guarantee the maintenance personal more science accurately judge the hydraulic system of online use and the leakage position and the situation of oil cylinder, thereby significantly improve the correct judgment rate of hydraulic system fault and the efficient of maintenance; And; After pressurize observation and analysis judgement when fully reliable and long enough finishes; Can pass through pressure hose and blowdown valve outlet pressure release respectively, oily and survey excess oil to the fuel tank backflow leakage; Thereby effectively stop to detect leakage waste and environmental pollution, safety, environmental protection, realize the analyzing and testing of hydraulic system and oil cylinder thereof efficiently with oil.
For further optimizing detection architecture; So that simultaneously oil cylinder two-chamber to be checked is carried out the comparison values of pressure detection and quantitative demonstration, Real Time Observation two-chamber pressure; Thereby more science, accurately, in time analyze the variation characteristic of contrast two-chamber pressure; Further improve accuracy, the reliability that detects, the utility model also comprises following improvement:
Said leak tester comprises the another set of detection system that the parts structure is identical, and the tensimeter import of this cover detection system connects the pressure hose of said another rapid-acting coupling; Said operation valve is manual three position four-way directional control valve; This reversal valve import A and the import intercommunication of electric contact pressure gauge and be connected the outlet of said electric oil pump; The import B of this reversal valve leads directly to said fuel tank, and the outlet C of this reversal valve, D connect a cover detection system and a hydraulic lock import thereof respectively.
Corresponding respectively rod chamber and the rodless cavity that connects hydraulic jack to be checked of said two cover detection systems and rapid-acting coupling thereof.
For the backflow leakage and the automatic locking that further prevent two-chamber detected pressures oil are pressed, pressure release, improve the accuracy, reliability, the automaticity that detect, the utility model also comprises following improvement:
The hydraulic control mouth of two cover detection system hydraulic lock connects the import of another set of detection system hydraulic lock respectively.
Said hydraulic lock is the retaining valve of band hydraulic control mouth.
For further improving agility and the security of leak tester for the oil delivery rate of dissimilar, pressure specification oil cylinder, guarantee the efficient of safety detection, the utility model also comprises following improvement:
Said detection system also comprises the one-way throttle valve that is connected between operation valve outlet and the hydraulic lock.
The import of said electric contact pressure gauge also connects the import of surplus valve, and the outlet of surplus valve is communicated with said fuel tank.
For the automaticity of further guaranteeing blowdown valve, and pressure holding function, improve accuracy, detection efficiency and environmental protection and saving performance that leak tester detects, the utility model also comprises following improvement:
The outlet of said blowdown valve is communicated with said fuel tank through high-pressure ball valve.
Said blowdown valve is the bi-bit bi-pass commutation type blowdown valve of Electromagnetic Drive, and its electromagnetism spare is electrically connected said control circuit.
For further improving the travelling performance of leak tester, the simple possible property of physical construction, guarantee accuracy, agility that leak tester detects, the utility model also comprises following improvement:
Said wheel is universal wheel and is installed in said fuel tank bottom; Said transmission all is fixed on the casing upper end of said fuel tank.
The utility model test run data is following:
(1), year economic benefit:
1, practices thrift labour cost; Change 5 workmans of the minimum needs of hydraulic jack in the zone of more difficult operation; Minimum needs of activity duration 4 hours, crane, trucking costs add up to 2000 yuan, and expense of oil cylinder of dismounting amounts to so: 100 * 5+2000=2500 unit; The estimation mistake was torn 4 oil cylinders open in 1 year, added up to and adopt the utility model can practice thrift above-mentioned cost: 2500 * 4=10000 unit.
2, practice thrift producing cost; Change 4 oil cylinders by top 1 year mistake, oil cylinder 4 hours amounts to 1 year 16 hours production time of delay; And produced about 100 tons in one hour, by 200 yuan/ton of screw thread steel profits can be regarded as 16 hours * 100 tons * 200 yuan/ton=320000 yuan of total charges for loss of working time.
Subtotal is annual practices thrift total expenses=labour cost+manufacturing cost=10000 yuan+320000 yuan=330000 yuan.
(2), social benefit:
Applying of the utility model mobile hydraulic oil cylinder leak tester; Can be for upkeep operation provide reliable data, avoid blindly changing oil cylinder, prolong oil cylinder serviceable life; Reduce production cost, reduce labour intensity; Increase work efficiency, and can prevent that a large amount of hydraulic oil run off, reduce fluid and leak the pollution of environment.
Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.
Description of drawings
Fig. 1 is the synoptic diagram of the hydraulic system of the utility model leak tester embodiment.
Fig. 2 is the synoptic diagram of the physical construction of Fig. 1 embodiment.
Fig. 3 is the workflow synoptic diagram of Fig. 1 embodiment.
Embodiment
Like Fig. 1,2, shown in be respectively the hydraulic system of the utility model mobile hydraulic oil cylinder leak tester embodiment and the synoptic diagram of physical construction.This leak tester comprises the rapid-acting coupling of docking with oil cylinder G two-chamber to be checked; Rapid-acting coupling comprise in regular turn the thread end that is connected with hydraulic jack G interface G1 to be checked, G2, soon connect male member 10, connect recessed 11 soon, pressure hose 12; And said leak tester comprises the fuel tank 20 of Armrest 22 and be installed in said fuel tank 20 bottoms universal wheel 21, be fixed on the parts of fuel tank 20 casings upper ends and fuel tank interlock; Transmission comprises: import and the electric contact pressure gauge 30 of surplus valve 32 imports connection, the control circuit 31 that is connected with its 30 signal output part; And the outlet of surplus valve 32 is communicated with said fuel tank 20, and transmission also comprises with fuel tank 20 and being communicated with in regular turn: be electrically connected the electric oil pump 40 of said control circuit 31, the two cover detection systems that are connected respectively with the manual 3-position 4-way formula reversing control valve 50 of electric contact pressure gauge 30 import intercommunications, with this manual reverse of direction operation valve 50 outlet C, D; Wherein, the manually import intercommunication of the import A of 3-position 4-way formula reversing control valve 50 and electric contact pressure gauge 30 and be connected the outlet of said electric oil pump 40, and the import B of this reversing control valve 50 leads directly to said fuel tank 20.
Manual reverse of direction operation valve 50 outlet C, D distinguish one-way throttle valve 60 imports of a direct cover detection system separately; Two cover detection systems comprise the one-way throttle valve 60 that connects in regular turn, the check valve-type hydraulic lock 70 of band hydraulic control mouth, the tensimeter 80 and the often-cutting type Electromagnetic Drive bi-bit bi-pass switching-over blowdown valve 90 of import intercommunication respectively; Electromagnetism spare 1YA, the 2YA of switching-over blowdown valve 90 are electrically connected said control circuit 31; The import of two tensimeters 80 connects the pressure hose 12 of one of said rapid-acting coupling respectively, and said fuel tank 20 is provided with and is communicated with two rapid-acting coupling pressure hoses 12 and inter-burst has the indirect path of switching-over blowdown valve 90 and high-pressure ball valve 91.The hydraulic control mouth of two cover detection system hydraulic lock 70 connects the import of another set of detection system hydraulic lock respectively; Corresponding respectively rod chamber and the rodless cavity that connects hydraulic jack G to be checked of two cover detection systems and rapid-acting coupling thereof.
Two rapid-acting couplings of the utility model connect oil cylinder G interface G1, G2 through thread end respectively, connect male member 10 soon and pass through thread connection on thread end, connect recessed 11 soon and are connected on the pressure hose 12.When the male member 10 of rapid-acting coupling, recessed 11 connect soon movable sleeve on recessed 11 (do not give and illustrating) connect fastening after; The nonreturn valve core that connects soon on the male member 10 will back down with the nonreturn valve core that connects recessed 11 soon each other; Thereby two one-way valve opens form path; When 10 recessed 11 of male members separated, two closed check valve oil circuits prevented leakage of oil.
Like Fig. 3, be depicted as the workflow synoptic diagram of Fig. 1 embodiment, workflow is specific as follows:
Connect rapid-acting coupling in oil cylinder G to be measured two chambeies: hydraulic jack G needn't disassemble; Only need take two chamber interface G1 apart, the last original tubing sub of G2 gets final product, the rapid-acting coupling of the band pressure hose 12 that then this machine is disposed and interface G1, the G2 in test solution compressing cylinder two chambeies connect;
Set electric contact pressure gauge 30 upper limits, start oil pump 40: set the upper limit force value of electric contact pressure gauge 30 and fuel primer pump 40 according to the specification of hydraulic jack G to be checked;
Electromagnetism spare 1YA, the 2YA dead electricity of order switching-over blowdown valve 90; Close switching-over blowdown valve 90: automatic or manual control; Thereby make electromagnetism spare 1YA, 2YA dead electricity close switching-over blowdown valve 90 paths, and close ball valve 91, prevent the bypass leakage of fluid from switching-over blowdown valve 90, ball valve 91;
Rotate reversing control valve 50 to a certain detection system oiling: choose the chamber of treating oiling and interface for example rodless cavity and interface G1; Pull manual reverse of direction operation valve 50 and give the interface G1 fuel feeding of hydraulic jack G rodless cavity, close simultaneously to the interface G2 of rod chamber and the fuel feeding of detection system thereof;
Pressure oil is suppressed to oil cylinder to be checked chamber: pressure oil flow through right side hydraulic lock 70 and interface G1, to suppress to selected oil cylinder rodless cavity to be checked, and these side bi-bit bi-pass electromagnetic switch blowdown valve 90 inflow points and entire system pressure continue to rise;
The test pressure value reaches electric contact pressure gauge 30 upper limits: when switching-over blowdown valve 90 inflow points and entire system pressure reach the capping of electric contact pressure gauge 30, electric contact pressure gauge 30 is to control circuit 31 output signals; Control circuit 31 stops oil pump 40 runnings automatically, interrupts fuel feeding, and system is in packing state;
The tensimeter in maintenance personal's observation analysis hydraulic jack G two chambeies: according to the two chamber pressure difference analyses that record: the big more explanation of pressure differential does not have leakage, and oil cylinder is intact; Pressure differential is more little more near two chamber balances, explains that there is leakage in hydraulic jack;
That 1YA, the 2YA of switching-over blowdown valve 90 gets is electric, open switching-over blowdown valve 90 drain charges: after above analysis draws and detects conclusion; Can open ball valve 91; And through manually or open-minded from command of execution switching-over blowdown valve 90 electromagnetism spare 1YA, 2YA; Hydraulic oil carries out pressure release through the ball valve 91 of switching-over blowdown valve 90 and unlatching, detects and gets back to fuel tank 20 with oil; Detecting operation is accomplished.
Claims (10)
1. mobile hydraulic oil cylinder leak tester; It comprises the rapid-acting coupling of docking with oil cylinder chamber to be checked; Rapid-acting coupling comprise in regular turn the thread end that is connected with hydraulic jack to be checked, soon connect male member, connect recessed, pressure hose soon; It is characterized in that: said leak tester comprise fuel tank and wheel thereof, with the parts of fuel tank interlock; Transmission comprises: the electric contact pressure gauge be connected electrically in the control circuit of its signal output part, and be communicated with successively with fuel tank: be electrically connected the electric oil pump of said control circuit, with the operation valve of electric contact pressure gauge import intercommunication, be connected the detection system of operation valve outlet; This detection system comprises in regular turn the pressure hose of one of often-cutting type blowdown valve and said rapid-acting coupling of the hydraulic lock, tensimeter and the import intercommunication with it that are communicated with; Said fuel tank is provided with the direct or indirect passage that is communicated with blowdown valve outlet and another rapid-acting coupling pressure hose.
2. mobile hydraulic oil cylinder leak tester according to claim 1, it is characterized in that: said leak tester comprises the another set of detection system that the parts structure is identical, the tensimeter import of this cover detection system connects the pressure hose of said another rapid-acting coupling; Said operation valve is manual three position four-way directional control valve; This reversal valve import A and the import intercommunication of electric contact pressure gauge and be connected the outlet of said electric oil pump; The import B of this reversal valve leads directly to said fuel tank, and the outlet C of this reversal valve, D connect a cover detection system and a hydraulic lock import thereof respectively.
3. like the said mobile hydraulic oil cylinder of claim 2 leak tester, it is characterized in that: corresponding respectively rod chamber and the rodless cavity that connects hydraulic jack to be checked of said two cover detection systems and rapid-acting coupling thereof.
4. like the said mobile hydraulic oil cylinder of claim 2 leak tester, it is characterized in that: said hydraulic lock is the retaining valve of band hydraulic control mouth.
5. like the said mobile hydraulic oil cylinder of claim 4 leak tester, it is characterized in that: the hydraulic control mouth of two cover detection system hydraulic lock connects the import of another set of detection system hydraulic lock respectively.
6. mobile hydraulic oil cylinder leak tester according to claim 1 or claim 2, it is characterized in that: said detection system also comprises the one-way throttle valve that is connected between operation valve outlet and the hydraulic lock.
7. mobile hydraulic oil cylinder leak tester according to claim 1 or claim 2, it is characterized in that: the import of said electric contact pressure gauge also connects the import of surplus valve, and the outlet of surplus valve is communicated with said fuel tank.
8. mobile hydraulic oil cylinder leak tester according to claim 1, it is characterized in that: the outlet of said blowdown valve is communicated with said fuel tank through high-pressure ball valve.
9. mobile hydraulic oil cylinder leak tester according to claim 1 or claim 2, it is characterized in that: said blowdown valve is the bi-bit bi-pass commutation type blowdown valve of Electromagnetic Drive, and its electromagnetism spare is electrically connected said control circuit.
10. mobile hydraulic oil cylinder leak tester according to claim 1 or claim 2, it is characterized in that: said wheel is universal wheel and is installed in said fuel tank bottom; Said transmission all is fixed on said fuel tank casing upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201849883U CN202101830U (en) | 2011-06-02 | 2011-06-02 | Mobile hydraulic oil cylinder leak tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201849883U CN202101830U (en) | 2011-06-02 | 2011-06-02 | Mobile hydraulic oil cylinder leak tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202101830U true CN202101830U (en) | 2012-01-04 |
Family
ID=45387836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201849883U Expired - Fee Related CN202101830U (en) | 2011-06-02 | 2011-06-02 | Mobile hydraulic oil cylinder leak tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202101830U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217261A (en) * | 2013-03-23 | 2013-07-24 | 鞍钢股份有限公司 | Hydraulic pipeline leakage online detecting method and device |
| CN104122050A (en) * | 2013-04-24 | 2014-10-29 | 哈尔滨飞机工业集团有限责任公司 | Dynamic pressure and static pressure testing device of helicopter distributed atmospheric engine |
| CN104155231A (en) * | 2014-04-02 | 2014-11-19 | 山东省鲁北地质工程勘察院 | Corrosion performance testing device and method for deep brine formation filter pipe |
| CN104314899A (en) * | 2013-09-11 | 2015-01-28 | 昆山新金福精密电子有限公司 | Reversing oil path system |
| CN104515645A (en) * | 2013-09-29 | 2015-04-15 | 天津台信检测技术有限公司 | Vehicle safeguard system |
| CN104697729A (en) * | 2015-03-24 | 2015-06-10 | 中国人民解放军军事交通学院 | Micro-leakage detection device |
| CN105697460A (en) * | 2016-04-25 | 2016-06-22 | 中冶赛迪工程技术股份有限公司 | High-precision hydraulic cylinder inner-leakage detection device |
| CN106840555A (en) * | 2016-12-27 | 2017-06-13 | 重庆维庆液压机械有限公司 | Hydraulic cylinder air tightness detection apparatus |
| CN107178543A (en) * | 2017-07-26 | 2017-09-19 | 国电联合动力技术有限公司 | A kind of wind power generating set impeller locks hydraulic control system |
| CN110296126A (en) * | 2019-07-12 | 2019-10-01 | 南通翔骜液压润滑设备有限公司 | The hydraulic cylinder for having detection hydraulic oil |
| CN110702316A (en) * | 2019-10-21 | 2020-01-17 | 上海中船三井造船柴油机有限公司 | Device and method for testing tightness of natural gas hydraulic drive pipeline of diesel engine |
| CN114593112A (en) * | 2022-02-22 | 2022-06-07 | 湖南诺玛液压科技有限公司 | Service life reliability testing device of hydraulic lock |
-
2011
- 2011-06-02 CN CN2011201849883U patent/CN202101830U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217261A (en) * | 2013-03-23 | 2013-07-24 | 鞍钢股份有限公司 | Hydraulic pipeline leakage online detecting method and device |
| CN104122050A (en) * | 2013-04-24 | 2014-10-29 | 哈尔滨飞机工业集团有限责任公司 | Dynamic pressure and static pressure testing device of helicopter distributed atmospheric engine |
| CN104314899A (en) * | 2013-09-11 | 2015-01-28 | 昆山新金福精密电子有限公司 | Reversing oil path system |
| CN104515645A (en) * | 2013-09-29 | 2015-04-15 | 天津台信检测技术有限公司 | Vehicle safeguard system |
| CN104155231B (en) * | 2014-04-02 | 2017-07-14 | 山东省鲁北地质工程勘察院 | A kind of Deep Formation Brine stratum filter pipe corrosive nature test device and method of testing |
| CN104155231A (en) * | 2014-04-02 | 2014-11-19 | 山东省鲁北地质工程勘察院 | Corrosion performance testing device and method for deep brine formation filter pipe |
| CN104697729A (en) * | 2015-03-24 | 2015-06-10 | 中国人民解放军军事交通学院 | Micro-leakage detection device |
| CN105697460A (en) * | 2016-04-25 | 2016-06-22 | 中冶赛迪工程技术股份有限公司 | High-precision hydraulic cylinder inner-leakage detection device |
| CN106840555A (en) * | 2016-12-27 | 2017-06-13 | 重庆维庆液压机械有限公司 | Hydraulic cylinder air tightness detection apparatus |
| CN106840555B (en) * | 2016-12-27 | 2018-12-07 | 重庆维庆液压机械有限公司 | Hydraulic cylinder air tightness detection apparatus |
| CN107178543A (en) * | 2017-07-26 | 2017-09-19 | 国电联合动力技术有限公司 | A kind of wind power generating set impeller locks hydraulic control system |
| CN110296126A (en) * | 2019-07-12 | 2019-10-01 | 南通翔骜液压润滑设备有限公司 | The hydraulic cylinder for having detection hydraulic oil |
| CN110702316A (en) * | 2019-10-21 | 2020-01-17 | 上海中船三井造船柴油机有限公司 | Device and method for testing tightness of natural gas hydraulic drive pipeline of diesel engine |
| CN114593112A (en) * | 2022-02-22 | 2022-06-07 | 湖南诺玛液压科技有限公司 | Service life reliability testing device of hydraulic lock |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202101830U (en) | Mobile hydraulic oil cylinder leak tester | |
| CN104776086B (en) | Remanufacture oil cylinder performance detecting platform | |
| CN104454748B (en) | Reliable comprehensive energy-saving hydraulic test device for gear pumps, overflow valves and one-way valves | |
| CN105603876A (en) | Dynamic real-time monitoring method for concrete bridge prestressed tendon tensioning force and special prestress construction system | |
| CN105605033A (en) | Self-contained pressure compensating system and pressure monitoring method thereof | |
| CN108006013B (en) | Online detection system and detection method for hydraulic hoist | |
| CN103323161A (en) | Detecting device of pre-stress of anchor | |
| CN202955067U (en) | Testing device for soft-reduction hydraulic cylinder manifold blocks on sector sections of rolling mills | |
| CN204312437U (en) | The synthesis energy saving experimental liquid pressure device of gear pump, relief valve and one-way valve reliability | |
| CN102828540B (en) | Device for diagnosing walking deviation fault of excavator | |
| CN104314924A (en) | Hydraulic cylinder testing bed system | |
| CN202501945U (en) | Under-anchor pre-stressing force detection device | |
| CN101949403B (en) | Oil filter for industrial hydraulic and lubrication system | |
| CN204476400U (en) | Wellbore construction prevents the drill stem washout testing and analysis system of drilling tool accident | |
| CN201866018U (en) | Oil filtering device for industrial hydraulic and lubricating system | |
| CN214366967U (en) | Integrated hydraulic valve block for life test of aviation actuator | |
| CN202023732U (en) | Maintenance and pressure test device for super-pressure pump | |
| CN201016837Y (en) | Direction machine inner leakage detecting arrangement for automobile hydraulic direction machine detecting bench | |
| CN205895767U (en) | Detecting system is carried to hydraulic pressure oil mass of freight train helping hand pump, orientation machine | |
| CN203796674U (en) | Hydraulic device of comprehensive test bed for hydraulic systems of drainage pavement performance recovery equipment | |
| CN202788685U (en) | Oil well working fluid fast reversing device | |
| CN205225936U (en) | On --spot detection device of switching -over valve | |
| CN103575473B (en) | Engine water circulation Oil Leakage Detecting system and apply the method that this system carries out Oil Leakage Detecting | |
| CN217107685U (en) | Comprehensive hydraulic element test platform | |
| CN104384458A (en) | Method for detecting internal leakage of hydraulic cylinders of CSP (compact strip production) continuous casting segments |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20170602 |