CN104295540B - Accumulator and hydraulic actuating mechanism with gas leakage alarm - Google Patents
Accumulator and hydraulic actuating mechanism with gas leakage alarm Download PDFInfo
- Publication number
- CN104295540B CN104295540B CN201410230283.9A CN201410230283A CN104295540B CN 104295540 B CN104295540 B CN 104295540B CN 201410230283 A CN201410230283 A CN 201410230283A CN 104295540 B CN104295540 B CN 104295540B
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- China
- Prior art keywords
- piston
- accumulator
- feeler lever
- magnet steel
- inflatable chamber
- 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.)
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 239000007789 gas Substances 0.000 claims description 39
- 238000009987 spinning Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
Abstract
The present invention relates to the accumulator with gas leakage alarm and hydraulic actuating mechanism.Accumulator with gas leakage alarm, including accumulator cylinder and the piston being arranged in accumulator cylinder, there is the pre- inflatable chamber being separated out by piston, the accumulator is provided with the piston displacement detection means for the displacement for being used to detect the piston close to one end of the pre- inflatable chamber in the accumulator cylinder.Because its interior pressure can be reduced after gas leakage in pre- inflatable chamber, piston will produce corresponding movement, therefore, it is the position of detectable piston by piston displacement detection means, so as to know that gas leaks situation in time, and alert locations can be set, if detecting the alert locations that piston is moved to setting, just illustrating that pre- inflatable chamber gas is leaked has needed maintenance, compared with prior art, it is not required to detect gas pressure again by breaker is out of service, it is to avoid the normal work on breaker produces influence.
Description
Technical field
The present invention relates to the accumulator with gas leakage alarm and hydraulic actuating mechanism.
Background technology
The accumulator of hydraulic operating mechanism of high voltage circuit breaker uses inflatable accumulator mostly, and existing accumulator is typically wrapped
Include accumulator cylinder and guiding movement is assemblied in piston in accumulator cylinder, accumulator cylinder is divided into left and right two by piston
Individual chamber, respectively high-voltage oil cavity and pre- inflatable chamber.When carrying out energy storage to accumulator, in pre- inflatable chamber insufflation gas, then
The piston being passed through to high-voltage oil cavity in high pressure liquid force feed, driving accumulator is moved to the right, and that compresses in pre- inflatable chamber pre- is filled with
Gas and store energy；When breaker is in normal operating condition, the rated oil pressure of hydraulic system is accumulator inner high voltage oil
The oil pressure of chamber, is provided by the pre- insufflation gas compressed, and needs to keep stable.
Accumulator compresses the pressure of pre- insufflation gas generally between 20~35MPa, and the pressure value is directly related to hydraulic pressure
The regular event of operating mechanism, accordingly, it would be desirable to often detect whether pre- insufflation gas occur in that leakage, to ensure hydraulic operating machine
The normal operation of structure and breaker.When carrying out leak detection to accumulator in the prior art, to ensure safe operation of electric network and inspection
Survey personal security, it is necessary to make breaker out of service, be filled with gas pressure value in advance whether to judge pre- insufflation gas by inspection
Leakage is occurred in that, on the one hand such detection mode has hysteresis quality to the discovery that gas is leaked, on the other hand can influence open circuit
The normal work of device, detection is inconvenient.
The content of the invention
It is an object of the invention to provide a kind of accumulator with gas leakage alarm, to solve in the prior art to gas
The problem of there is hysteresis quality and the work of breaker can be influenceed in the discovery of body leakage；Meanwhile, make present invention also offers one kind
With the hydraulic actuating mechanism of the accumulator.
The technical scheme of the accumulator use with gas leakage alarm is in the present invention：Band gas leakage alarm
Accumulator, including accumulator cylinder and the piston that is arranged in accumulator cylinder have by piston in the accumulator cylinder
The pre- inflatable chamber being separated out, the accumulator is provided with the displacement for detecting the piston close to one end of the pre- inflatable chamber
Piston displacement detection means.
The piston displacement detection means includes the feeler lever being fixed on the piston and is arranged on the accumulator cylinder
Magnet proximity switch on the plugging structure of corresponding end, the feeler lever overhangs in the pre- inflatable chamber, the magnet proximity switch bag
Include the magnet steel that guiding movement is assemblied on the plugging structure and the Magnetic Sensor being fixed on the plugging structure, the feeler lever
With the top splenium for magnet steel described in top pressure.
The top splenium is that the flange set on the projecting end of feeler lever is formed.
The feeler lever is provided with external screw thread, and the piston is provided with corresponding screwed hole, and the feeler lever spinning is in the spiral shell
In pit and feeler lever line is provided with the adjusting nut for being used for adjusting the depth that the feeler lever is screwed in screwed hole.
The plugging structure includes being embedded the obturating plug in accumulator barrel end, and the inner side end of the obturating plug is provided with confession
The magnet steel jack that magnet steel guiding movement is plugged, end face outside is provided with the sensor mounting hole for being used for assembling the Magnetic Sensor,
The magnet steel jack and sensor mounting hole are blind hole and are parallel to each other, and are installed with the accumulator cylinder for preventing institute
State the end cap of obturating plug abjection.
The technical scheme of hydraulic actuating mechanism use is in the present invention, hydraulic actuating mechanism, including band gas leakage warning
The accumulator of device, the accumulator includes accumulator cylinder and the piston being arranged in accumulator cylinder, the accumulator cylinder
There is the pre- inflatable chamber being separated out by piston in vivo, the accumulator is provided with close to one end of the pre- inflatable chamber to be used to detect institute
State the piston displacement detection means of the displacement of piston.
The piston displacement detection means includes the feeler lever being fixed on the piston and is arranged on the accumulator cylinder
Magnet proximity switch on the plugging structure of corresponding end, the feeler lever overhangs in the pre- inflatable chamber, the magnet proximity switch bag
Include the magnet steel that guiding movement is assemblied on the plugging structure and the Magnetic Sensor being fixed on the plugging structure, the feeler lever
With the top splenium for magnet steel described in top pressure.
The top splenium is that the flange set on the projecting end of feeler lever is formed.
The feeler lever is provided with external screw thread, and the piston is provided with corresponding screwed hole, and the feeler lever spinning is in the spiral shell
In pit and feeler lever line is provided with the adjusting nut for being used for adjusting the depth that the feeler lever is screwed in screwed hole.
The plugging structure includes being embedded the obturating plug in accumulator barrel end, and the inner side end of the obturating plug is provided with confession
The magnet steel jack that magnet steel guiding movement is plugged, end face outside is provided with the sensor mounting hole for being used for assembling the Magnetic Sensor,
The magnet steel jack and sensor mounting hole are blind hole and are parallel to each other, and are installed with the accumulator cylinder for preventing institute
State the end cap of obturating plug abjection.
The present invention uses above-mentioned technical proposal, and the accumulator with gas leakage alarm includes accumulator cylinder and setting
There is the pre- inflatable chamber being separated out by piston, the accumulator is leaned in piston in accumulator cylinder, the accumulator cylinder
One end of the nearly pre- inflatable chamber is provided with the piston displacement detection means for the displacement for being used to detect the piston, due to pre- inflatable chamber
Its interior pressure can be reduced after interior gas leakage, and piston will produce corresponding movement, therefore, pass through piston displacement detection means
The position of piston is detected, so as to know that gas leaks situation in time, it is possible to set alert locations, if detecting piston movement
The alert locations of setting are arrived, just illustrating that pre- inflatable chamber gas is leaked has needed maintenance, compared with prior art, no
Gas pressure need to be detected again by breaker is out of service, it is to avoid the normal work on breaker produces influence.
Brief description of the drawings
Fig. 1 is the structural representation of one embodiment of the accumulator with gas leakage alarm in the present invention；
Fig. 2 is the enlarged drawing of the mounting structure of magnet proximity switch in Fig. 1.
Each reference is corresponding entitled in figure：1 accumulator cylinder, 2 pistons, 31 high-voltage oil cavities, 32 pre- inflatable chambers, 4
Feeler lever, 41 flanges, 5 adjusting nuts, 61 obturating plugs, 611 magnet steel jacks, 612 sensor mounting hole, 62 end caps, 71 magnet steel, 72 magnetic are passed
Sensor, 8 limited caps, 9 compression springs.
Embodiment
One embodiment of the accumulator with gas leakage alarm is as shown in Fig. 1 ~ Fig. 2 in the present invention, including axial direction
Accumulator cylinder 1 that two ends are respectively equipped with plugging structure and the piston 2 being arranged in accumulator cylinder 1, piston 2 is by accumulator cylinder
Body 1 is divided into left and right two chambers, respectively high-voltage oil cavity 31 and pre- inflatable chamber 32.Accumulator also includes being used to detect described
The piston displacement detection means of the displacement of piston 2, the piston displacement detection means includes the feeler lever 4 being fixed on the piston 2
With the magnet proximity switch being arranged on the plugging structure of the right-hand member of accumulator cylinder 1.
The feeler lever 4 includes being provided with the externally threaded end of thread and the projecting end provided with flange 41, the right-hand end of the piston 2
Face is provided with screwed hole corresponding with the end of thread, and the end of thread spinning of the feeler lever 4 is in the screwed hole, and projecting end overhangs
In pre- inflatable chamber 32.The adjusting nut 5 for adjusting the depth that the feeler lever 4 is screwed in screwed hole is additionally provided with feeler lever 4, can
Feeler lever 4 is locked on the piston 2 after feeler lever 4 adjusts cantilevered length.
The plugging structure in the left side of accumulator cylinder 1 is same as the prior art, and the plugging structure on the right side of accumulator cylinder 1 includes
It is embedded in the obturating plug 61 of the end of accumulator cylinder 1 and the end cap 62 for carrying out axial limiting to obturating plug 61.The obturating plug 61 is
Stepped rotary structure, into "convex" shaped.End cap 62 is provided with ladder hole, and the aperture on the left of ladder hole is larger and is provided with
Internal thread, the external screw thread of accumulator cylinder 1 is fixed to for spinning；The position of ladder hole varying aperture is formed towards left ring
Shape step surface, it is spacing for carrying out block to obturating plug 61.After obturating plug 61 is installed, its right side outwardly is exposed to end cap 62
On perforate in.The magnet proximity switch is prior art, including magnet steel 71 and Magnetic Sensor 72, in the left end face of obturating plug 61
Provided with the magnet steel jack 611 plugged is oriented to for magnet steel 71, its right end face is provided with the sensing for being used for assembling the Magnetic Sensor 72
Device mounting hole 612, the magnet steel jack 611 and sensor mounting hole 612 are blind hole and are parallel to each other.Also fixed on obturating plug 61
Have for limiting magnet steel 71 towards the limited cap 8 of left moving limit, limited cap 8 is provided with the perforation passed for magnet steel 71, magnet steel
71 are provided with the shaft shoulder coordinated with the block of limited cap 8, and compression spring 9 is provided between the shaft shoulder and obturating plug 61, for answering magnet steel 71
Position.The flange 41 set on the projecting end of the feeler lever 4 forms the top splenium for magnet steel described in top pressure 71, it is ensured that to magnet steel 71
Effective shake-up.
When the gas in pre- inflatable chamber 32 is leaked, the piston 2 in accumulator moves right, and makes the pressure of compressed gas
The rated oil pressure of power and hydraulic system is consistent.As the gases at high pressure in pre- inflatable chamber 32 are constantly leaked, in accumulator
Piston 2 gradually move right, move closer to the magnet steel 71 of magnet proximity switch with movable feeler lever 4, and finally contact magnet steel 71 and push away
It is moved to move right.When the high pressure gas leakage degree in pre- inflatable chamber 32 reaches predetermined alarm point, the magnetic of magnet proximity switch
Steel 71 is moved to predetermined stroke, triggers the Magnetic Sensor 72 of magnet proximity switch, and the normally opened contact of Magnetic Sensor 72 is converted to normally closed
Contact, sends accumulator and is filled with gas leakage warning signal in advance, point out staff to overhaul the accumulator.Maintenance is completed
Afterwards, feeler lever 4 departs from magnet steel 71, and magnet steel 71 is moved to the left in the presence of corresponding back-moving spring, and leaves alert locations, and magnetic is passed
The normally-closed contact of sensor 72 is converted to normally opened contact again, and the alarm signal of magnet proximity switch is released.Let out using above-mentioned band gas
The accumulator of alarm device is failed to report, can be in the state of primary cut-out be normally run, gas in on-line real time monitoring accumulator
Predetermined extent whether is leaked into, alarm signal is produced in time, it is easy to use, improve the reliability of actuating system and breaker.
One embodiment of hydraulic actuating mechanism includes accumulator and corresponding transmission mechanism in the present invention, on accumulator is
The accumulator with gas leakage alarm in embodiment is stated, the structure of transmission mechanism is same as the prior art, herein no longer
Repeat.
In the above-described embodiments, piston displacement detection means uses feeler lever 4 and magnet proximity switch, and feeler lever 4 is fixed on
On piston 2, magnet proximity switch is arranged on plugging structure, in other embodiments of the invention, and magnet proximity switch can also be adopted
Other mounting means are used, for example, are directly fixed magnet steel 71 on the piston 2, and magnetic inductor is fixed to outside accumulator cylinder 1
On side face or on plugging structure, the detection to the displacement of piston 2 can be equally realized；And piston displacement detection means can also be replaced
Other forms, such as travel switch or optoelectronic switch are changed into, as long as the detection to the displacement of piston 2 can be realized.
Claims (8)
1. the accumulator with gas leakage alarm, including accumulator cylinder and the piston being arranged in accumulator cylinder, institute
Stating has the pre- inflatable chamber being separated out by piston in accumulator cylinder, it is characterised in that：The accumulator is close to the pre- inflation
One end of chamber is provided with the piston displacement detection means for the displacement for being used to detect the piston, pre- inflatable chamber after gas leakage in it
Pressure is reduced, and piston produces relative movement, and detecting piston by piston displacement detection means is moved to setting position and knows
Gases did escape in pre- inflatable chamber, the piston displacement detection means includes feeler lever and the setting being fixed on the piston
Magnet proximity switch on the plugging structure of the accumulator cylinder corresponding end, the feeler lever overhangs in the pre- inflatable chamber,
Magnet steel and be fixed on the plugging structure that the magnet proximity switch is assemblied on the plugging structure including guiding movement
Magnetic Sensor, the feeler lever has the top splenium for magnet steel described in top pressure, between the feeler lever end of magnet steel top pressure and magnet steel
With spacing, magnet proximity switch is structure as a whole.
2. the accumulator according to claim 1 with gas leakage alarm, it is characterised in that：The top splenium be by
The flange set on the projecting end of feeler lever is formed.
3. the accumulator according to claim 1 or 2 with gas leakage alarm, it is characterised in that：On the feeler lever
Provided with external screw thread, the piston is provided with corresponding screwed hole, and the feeler lever spinning is in the screwed hole and on feeler lever line
Provided with the adjusting nut for adjusting the depth that the feeler lever is screwed in screwed hole.
4. the accumulator according to claim 1 or 2 with gas leakage alarm, it is characterised in that：The closure knot
Structure includes being embedded the obturating plug in accumulator barrel end, and the inner side end of the obturating plug is provided with what is plugged for magnet steel guiding movement
Magnet steel jack, end face outside is provided with the sensor mounting hole for being used for assembling the Magnetic Sensor, the magnet steel jack and sensing
Device mounting hole is blind hole and is parallel to each other, and is installed with the accumulator cylinder for preventing the end cap of the obturating plug abjection.
5. hydraulic actuating mechanism, including the accumulator with gas leakage alarm, the accumulator include accumulator cylinder and
Being arranged on has the pre- inflatable chamber being separated out by piston in the piston in accumulator cylinder, the accumulator cylinder, its feature exists
In：The accumulator detects dress close to the piston displacement that one end of the pre- inflatable chamber is provided with the displacement for being used to detect the piston
Put, its interior pressure reduction after gas leakage in pre- inflatable chamber, piston produces relative movement, examined by piston displacement detection means
Measure piston to be moved to setting position and know gases did escape in pre- inflatable chamber, the piston displacement detection means includes
The feeler lever being fixed on the piston and the magnet proximity switch being arranged on the plugging structure of the accumulator cylinder corresponding end, institute
State feeler lever to overhang in the pre- inflatable chamber, the magnet proximity switch includes the magnetic that guiding movement is assemblied on the plugging structure
Steel and the Magnetic Sensor being fixed on the plugging structure, the feeler lever have the top splenium for magnet steel described in top pressure, with magnetic
There is spacing, magnet proximity switch is structure as a whole between the feeler lever end of steel top pressure and magnet steel.
6. hydraulic actuating mechanism according to claim 5, it is characterised in that：The top splenium is on the projecting end of feeler lever
The flange of setting is formed.
7. the hydraulic actuating mechanism according to claim 5 or 6, it is characterised in that：The feeler lever is provided with external screw thread, described
Piston is provided with corresponding screwed hole, and the feeler lever spinning is provided with the screwed hole and on feeler lever line to be used to adjust described
The adjusting nut for the depth that feeler lever is screwed in screwed hole.
8. the hydraulic actuating mechanism according to claim 5 or 6, it is characterised in that：The plugging structure, which includes being embedded, to be stored
The obturating plug of energy device barrel end, the inner side end of the obturating plug is provided with the magnet steel jack plugged for magnet steel guiding movement, outside
End face is provided with the sensor mounting hole for being used for assembling the Magnetic Sensor, and the magnet steel jack and sensor mounting hole are blind
Hole and it is parallel to each other, is installed with the accumulator cylinder for preventing the end cap of the obturating plug abjection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410230283.9A CN104295540B (en) | 2014-05-28 | 2014-05-28 | Accumulator and hydraulic actuating mechanism with gas leakage alarm |
| PCT/CN2014/092209 WO2015180435A1 (en) | 2014-05-28 | 2014-11-25 | Energy accumulator with gas leakage alarm device and hydraulic operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410230283.9A CN104295540B (en) | 2014-05-28 | 2014-05-28 | Accumulator and hydraulic actuating mechanism with gas leakage alarm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104295540A CN104295540A (en) | 2015-01-21 |
| CN104295540B true CN104295540B (en) | 2017-10-20 |
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ID=52315410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410230283.9A Active CN104295540B (en) | 2014-05-28 | 2014-05-28 | Accumulator and hydraulic actuating mechanism with gas leakage alarm |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104295540B (en) |
| WO (1) | WO2015180435A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295540B (en) * | 2014-05-28 | 2017-10-20 | 国家电网公司 | Accumulator and hydraulic actuating mechanism with gas leakage alarm |
| CN105757012B (en) * | 2016-04-14 | 2018-04-06 | 江阴秋钧机电设备有限公司 | Monitor the accumulator of accumulator oil liquid leakage |
| CN108343644B (en) * | 2017-12-29 | 2020-02-21 | 河南平高电气股份有限公司 | Pneumatic energy accumulator, hydraulic operating mechanism and high-voltage circuit breaker |
| CN108535001B (en) * | 2018-04-04 | 2019-07-16 | 北京理工大学 | A kind of hydro-pneumatic spring accumulator condition detecting system and method based on electromagnetic induction |
| CN108518367A (en) * | 2018-04-20 | 2018-09-11 | 广州文冲船厂有限责任公司 | A kind of piston accumulator |
| CN110578715A (en) * | 2018-06-07 | 2019-12-17 | 布柯玛蓄能器（天津）有限公司 | Lining type piston accumulator with alarm function |
| CN109091692B (en) * | 2018-09-20 | 2023-09-29 | 小护士(天津)科技股份有限公司 | Disinfection equipment in sanitary towel production process |
| CN109900440B (en) * | 2019-03-26 | 2023-12-05 | 广西淞森车用部件有限公司 | Device and method for detecting leakage of flange plate and rollover valve assembly |
| CN110594573A (en) * | 2019-09-10 | 2019-12-20 | 中国空气动力研究与发展中心超高速空气动力研究所 | Low-pressure gas storage device |
| CN111350705B (en) * | 2020-03-31 | 2021-06-04 | 中国商用飞机有限责任公司 | Method for determining gas leakage of accumulator of civil aircraft hydraulic system |
| CN114177562A (en) * | 2022-01-13 | 2022-03-15 | 国网上海市电力公司 | Flexible temperature sensing self-starting fire extinguishing device capable of being filled and detected conveniently |
| CN117699259B (en) * | 2024-02-03 | 2024-04-12 | 江苏乐尔环境科技股份有限公司 | Piperazine DTC fly ash curing chelating agent packaging storage device and storage method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3425610B2 (en) * | 1996-06-07 | 2003-07-14 | 宣行 杉村 | Piston type accumulator piston position detector |
| DE19701303A1 (en) * | 1997-01-16 | 1998-07-23 | Hydac Technology Gmbh | Piston accumulator with sealing device |
| CN201041147Y (en) * | 2007-05-09 | 2008-03-26 | 夏德仕 | Piston type energy accumulator liquid level control transmission device |
| ATE556228T1 (en) * | 2007-09-10 | 2012-05-15 | Cameron Int Corp | PRESSURE COMPENSATED BATTERY BOTTLE |
| CN101956732B (en) * | 2010-11-04 | 2013-02-13 | 何学才 | Gas and oil canister combined non-isolated multiple piston accumulator |
| CN102182714A (en) * | 2011-06-08 | 2011-09-14 | 何学才 | Gas and oil non-isolated mixed type piston energy accumulator |
| CN102297167A (en) * | 2011-07-29 | 2011-12-28 | 安徽合力股份有限公司 | Bladder accumulator for full-hydraulic power brake system of forklift |
| DE102011090050A1 (en) * | 2011-12-28 | 2013-07-04 | Robert Bosch Gmbh | Method for determining a position of a piston in a piston accumulator by means of inductive sensors and suitably designed piston accumulator |
| CN203146453U (en) * | 2013-02-07 | 2013-08-21 | 奉化市朝日液压有限公司 | Warning type piston accumulator |
| CN104295540B (en) * | 2014-05-28 | 2017-10-20 | 国家电网公司 | Accumulator and hydraulic actuating mechanism with gas leakage alarm |
-
2014
- 2014-05-28 CN CN201410230283.9A patent/CN104295540B/en active Active
- 2014-11-25 WO PCT/CN2014/092209 patent/WO2015180435A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015180435A1 (en) | 2015-12-03 |
| CN104295540A (en) | 2015-01-21 |
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