CN103306968A - Transformer oil pump testing device and testing method thereof - Google Patents
Transformer oil pump testing device and testing method thereof Download PDFInfo
- Publication number
- CN103306968A CN103306968A CN2013102842989A CN201310284298A CN103306968A CN 103306968 A CN103306968 A CN 103306968A CN 2013102842989 A CN2013102842989 A CN 2013102842989A CN 201310284298 A CN201310284298 A CN 201310284298A CN 103306968 A CN103306968 A CN 103306968A
- Authority
- CN
- China
- Prior art keywords
- oil pump
- test
- pipeline
- tested
- transformer oil
- 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.)
- Granted
Links
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a transformer oil pump testing device and a testing method thereof. The transformer oil pump testing device comprises oil tanks and two sets of testing pipelines connected with the oil tanks, wherein the oil tanks comprise an upper oil tank and a lower oil tank which are arranged in a high-low manner and mutually communicated; the pipe diameters of the two sets of parallel testing pipelines are different, and the size of the pipe diameters is matched with to-be-tested oil pumps to be adapted to oil pumps with different apertures and meet the requirement for testing to-be-tested oil pumps of different model numbers; each testing pipeline comprises an inlet pipe and an outlet pipe, as well as a flow meter, a pipeline adjusting butterfly valve, a pressure testing device and a to-be-tested oil pump all arranged on the inlet pipe and the outlet pipe. According to the invention, an electric locomotive transformer oil circulating system is simulated to meet the requirements of transformer oil pump delivery tests and type tests; the two sets of testing pipelines with different pipe diameters are adopted to meet the requirements of the tests of various type oil pumps with two kinds of apertures, so that the application range of the oil pump testing device is greatly enlarged.
Description
Technical field
The present invention relates to a kind of transformer oil pump test device, be specifically related to a kind of testing apparatus and test method of dispatch from the factory routine test and type approval test of electric locomotive transformer oil pump, belong to field of mechanical technique.
Background technique
The transformer oil pump of electric locomotive is before dispatching from the factory, and the product quality standard department of manufacturing firm must comprehensively check quality of product, performance, to identify whether product meets relevant country and company standard.At present, the transformer oil pump of electric locomotive is tested electrical properties and the hydraulic performance test of mainly carrying out oil pump before dispatching from the factory, whether satisfy the requirement of dispatching from the factory with the property indices of checking the transformer oil pump oil pump; Another important use of oil pump testing device is that the novel oil pump to design research and development carries out type approval test, with the electrical properties of the oil pump of verifying new research and development and the designing requirement whether hydraulic performance satisfies oil pump.Therefore, need a kind of transformer oil pump test device that can the actual operating conditions of analogue transformer oil pump on electric locomotive transformer of design, simulate the electric locomotive transformer oil circulating system, to satisfy the needs of transformer oil pump delivery test and type approval test.
Summary of the invention
Technical problem to be solved by this invention is for above demand, and a kind of transformer oil pump test device and test method thereof are provided, to satisfy the requirement of oil pump delivery test and type approval test.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of transformer oil pump test device comprises fuel tank and is connected to the cover of two on fuel tank test pipeline; Described fuel tank is comprised of top tank and the lower fuel tank just arranged and be interconnected, and the import of described test pipeline connects described lower fuel tank, and the outlet of described test pipeline connects described top tank; The caliber of the test pipeline that described two covers be arranged in parallel is different, and pipe diameter size matches with tested oil pump, adapts to respectively different bore oil pumps, to satisfy the test needs of different model oil pump tested; Described test pipeline comprises inlet tube, outer pipe, and is arranged on flowmeter, pipeline regulating butterfly valve, pressure test device and oil pump tested on described inlet tube, the outer pipe; Described inlet tube is connected between described lower fuel tank and the oil pump tested, and described outer pipe is connected between described top tank and the oil pump tested; Be connected with the pipeline regulating butterfly valve between described lower fuel tank and the oil pump tested, be connected with flowmeter and pipeline regulating butterfly valve between described top tank and the oil pump tested in turn; Described pressure test device comprises U-shaped hook gauge, import pressure measurement ring and outlet pressure measurement ring, described import pressure measurement ring is arranged on the oil pump tested suction side, described outlet oil pump is arranged on the oil pump tested outlet side, described import pressure measurement ring links to each other with described U-shaped hook gauge respectively with outlet pressure measurement ring, is used for measuring the lift of oil pump tested; Described flowmeter and turbine conveyer-flow indicating integrator link, the flow of test oil pump tested; Described pipeline regulating butterfly valve is electric butterfly valve, adjusts quickly and easily the switch of test pipe.
In the present invention, described top tank and lower fuel tank top are respectively arranged with an outlet pipe, are provided with an outlet valve on the described outlet pipe, are used for getting rid of the air of transformer oil pump test device inside, form the experimental enviroment of a sealing and circulating.
In the present invention, described test pipeline comprises the first test pipeline and the second test pipeline, and the caliber of the first test pipeline is 100mm, and the caliber of the second test pipeline is 80mm, to adapt to the test needs of different bore oil pumps.
In the present invention, one section bellows is installed on the described test pipeline, is used for compensation and is absorbed in pipeline owing to distortion and vibration that compression shock occurs, effectively guaranteed testing precision.
In the present invention, be provided with a stroboscope on the described test pipeline, be used for measuring the rotating speed of oil pump tested.
In the present invention, be provided with device for heating transformer oil in the described fuel tank, so that transformer oil oil temperature and the external temperature simulated more accurately under the actual operating conditions are crossed the stickiness that guarantees transformer oil when hanging down.
In the present invention, be provided with thermal insulation layer on the described fuel tank, effective heat-insulation and heat-preservation reduces the temperature variation of transformer oil.
In the present invention, be provided with oily filtrating equipment on the described test pipeline, be used for impurity in the eliminating transformer oil, to guarantee the normal operation of whole transformer oil pump test device.
Thereby the present invention also provides a kind of utilizes above-mentioned transformer oil pump test device to simulate a kind of transformer oil pump test method that the electric locomotive main transformer oil circulating system is carried out the transformer oil pump testing, comprises following committed step:
Step 7, off-test, deenergization cuts out butterfly valve, and clearness test is on-the-spot.
Transformer oil pump test device of the present invention and test method thereof are compared with oil pump testing device of the prior art owing to adopting above technological scheme, and the good effect of its generation is obvious:
1), the present invention simulated the working environment of electric locomotive transformer oil circulating system, oil pump tested and lower fuel tank are at the same level line, the caliber of test pipeline is identical with electric locomotive transformer transport pipe caliber, has guaranteed test accuracy;
2), the present invention adopts the test pipeline of two cover different tube diameters simultaneously, can satisfy simultaneously the test needs of the various oil pump of two kinds of bores, greatly improved the Applicable scope of oil pump testing device, reduced cost;
3), the design of the experimental enviroment of sealing and circulating can get rid of the error that external interference is brought test to greatest extent, avoid simultaneously environment;
4), the present invention is by pipeline regulating butterfly valve control transformer oil pump testing device, and stable, adjustable operation of oil pump pressure environment is provided;
5), test method of the present invention is easy to realize, highly versatile, is convenient to test oil pump performance.
Description of drawings
Fig. 1 is test block diagram of the present invention;
Fig. 2 is main TV structure schematic diagram of the present invention;
Fig. 3 is that the A of Fig. 2 is to structural representation.
Among the figure: 1. oil pump tested, 2. lower fuel tank, 3. U-shaped hook gauge, 4. outlet pressure measurement ring, 5. outlet valve, 6. outlet pipe 7. first is tested pipeline, 8. the second test pipeline, 9. top tank, 10. outer pipe, 11. electric butterfly valve, 12. flowmeters, 13. bellowss, 14. inlet tubes, 15. import pressure measurement rings.
Embodiment
Can further be well understood to the purpose, technical solutions and advantages of the present invention by specific embodiments of the invention given below.But they are not limitation of the invention.
As shown in drawings, embodiment one, and a kind of transformer oil pump test device comprises fuel tank and is connected to the test pipeline 7 of first on the fuel tank and the second test pipeline 8; Fuel tank is comprised of top tank 9 and the lower fuel tank 2 just arranged and be interconnected, two fuel tanks configurations has not only increased the total amount that fuel tank holds transformer oil, satisfy the test needs of large flow oil pump, and in experimentation, oil return has certain kinetic energy to the transformer oil of fuel tank, direct circulation enters the test pipeline and can have a negative impact to testing precision, oil return is entering lower fuel tank 2 to the transformer oil of fuel tank again through after the transition of top tank 9, assurance enters the oil pressure of the transformer oil of test pipeline stablizes, and then proof test result's precision; The import of test pipeline connects lower fuel tank 2, the outlet of test pipeline connects top tank 9, top tank 9 and lower fuel tank 2 tops are respectively arranged with an outlet pipe 6, be provided with an outlet valve 5 on the outlet pipe 6, be used for getting rid of the air of transformer oil pump test device inside, form the experimental enviroment of a sealing and circulating, to reduce the external environment condition variation to the impact of test result; The caliber of the test pipeline that two covers be arranged in parallel is different, the caliber of the first test pipeline 7 is 100mm, and the caliber of the second test pipeline 8 is 80mm, and pipe diameter size matches with tested oil pump, adapt to respectively different bore oil pumps, to satisfy the test needs of different model oil pump tested 1; The test pipeline comprises inlet tube 14, outer pipe 10, and is arranged on flowmeter 12, pipeline regulating butterfly valve, pressure test device and oil pump tested 1 on inlet tube 14, the outer pipe 10; Inlet tube 14 is connected between lower fuel tank 2 and the oil pump tested 1, and outer pipe 10 is connected between top tank 9 and the oil pump tested 1; Be connected with the pipeline regulating butterfly valve between lower fuel tank 2 and the oil pump tested 1, be connected with flowmeter 12 and pipeline regulating butterfly valve between top tank 9 and the oil pump tested 1 in turn, on the outer pipe 10 of test pipeline one section bellows 13 is installed, be used for compensation and be absorbed in distortion and the vibration that pipeline occurs owing to compression shock, effectively guaranteed testing precision, test is provided with oily filtrating equipment on the pipeline, is used for impurity in the eliminating transformer oil, to guarantee the normal operation of whole transformer oil pump test device; Pressure test device comprises U-shaped hook gauge 3, import pressure measurement ring 15 and outlet pressure measurement ring 4, import pressure measurement ring 15 is arranged on oil pump tested 1 suction side, the outlet oil pump is arranged on oil pump tested 1 outlet side, import pressure measurement ring 15 links to each other with U-shaped hook gauge 3 respectively with outlet pressure measurement ring 4, is used for measuring the lift of oil pump tested 1; Flowmeter 12 links with turbine conveyer-flow indicating integrator, the flow of test oil pump tested 1; The pipeline regulating butterfly valve is electric butterfly valve 11, adjusts quickly and easily the switch of test pipe; Be provided with a stroboscope on the test pipeline, be used for measuring the rotating speed of oil pump tested 1, thereby record the various performance parameters of transformer oil pump, finish the test of transformer oil pump.
Embodiment two, be to be provided with in the fuel tank device for heating transformer oil and thermal insulation layer with embodiment one difference, effective heat-insulation and heat-preservation, so that transformer oil oil temperature and the external temperature simulated more accurately under the actual operating conditions are crossed the stickiness that guarantees transformer oil when hanging down, with the proof test precision.
Embodiment three, utilize above-mentioned transformer oil pump test device to simulate a kind of transformer oil pump test method that the electric locomotive main transformer oil circulating system is carried out the transformer oil pump testing thereby the present invention also provides a kind of, comprise following committed step:
Step 7, off-test, oil-break, outage.
The present invention has simulated the working environment of electric locomotive transformer oil circulating system, oil pump tested is installed in the position in the simulation electric locomotive main transformer oil circulating system, with lower fuel tank at the same level line, caliber is identical with electric locomotive main transformer pipeline road caliber, easy installation and reliable, good seal performance, precision is guaranteed.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a transformer oil pump test device is characterized in that: comprise fuel tank and be connected to the cover of two on fuel tank test pipeline; Described fuel tank is comprised of top tank and the lower fuel tank just arranged and be interconnected, and the import of described test pipeline connects described lower fuel tank, and the outlet of described test pipeline connects described top tank; The caliber of the test pipeline that described two covers be arranged in parallel is different, and pipe diameter size matches with tested oil pump, adapts to respectively different bore oil pumps, to satisfy the test needs of different model oil pump tested; Described test pipeline comprises inlet tube, outer pipe, and is arranged on flowmeter, pipeline regulating butterfly valve, pressure test device and oil pump tested on described inlet tube, the outer pipe; Described inlet tube is connected between described lower fuel tank and the oil pump tested, and described outer pipe is connected between described top tank and the oil pump tested; Be connected with the pipeline regulating butterfly valve between described lower fuel tank and the oil pump tested, be connected with flowmeter and pipeline regulating butterfly valve between described top tank and the oil pump tested in turn; Described pressure test device comprises U-shaped hook gauge, import pressure measurement ring and outlet pressure measurement ring, described import pressure measurement ring is arranged on the oil pump tested suction side, described outlet oil pump is arranged on the oil pump tested outlet side, described import pressure measurement ring links to each other with described U-shaped hook gauge respectively with outlet pressure measurement ring, is used for measuring the lift of oil pump tested; Described flowmeter and turbine conveyer-flow indicating integrator link, the flow of test oil pump tested; Described pipeline regulating butterfly valve is electric butterfly valve, adjusts quickly and easily the switch of test pipe.
2. a kind of transformer oil pump test device as claimed in claim 1, it is characterized in that: described top tank and lower fuel tank top are respectively arranged with an outlet pipe, be provided with an outlet valve on the described outlet pipe, be used for getting rid of the air of depressor oil pump testing device inside, form the experimental enviroment of a sealing and circulating.
3. a kind of transformer oil pump test device as claimed in claim 1, it is characterized in that: described test pipeline comprises the first test pipeline and the second test pipeline, the caliber of the first test pipeline is 100mm, and the caliber of the second test pipeline is 80mm, to adapt to the test needs of different bore oil pumps.
4. a kind of transformer oil pump test device as claimed in claim 1 is characterized in that: one section bellows is installed on the described test pipeline, is used for compensation and is absorbed in pipeline owing to distortion and vibration that compression shock occurs, effectively guaranteed testing precision.
5. a kind of transformer oil pump test device as claimed in claim 1 is characterized in that: be provided with a stroboscope on the described test pipeline, be used for measuring the rotating speed of oil pump tested.
6. a kind of transformer oil pump test device as claimed in claim 1, it is characterized in that: be provided with device for heating transformer oil in the described fuel tank, so that transformer oil oil temperature and the external temperature simulated more accurately under the actual operating conditions are crossed the stickiness that guarantees transformer oil when hanging down.
7. a kind of transformer oil pump test device as claimed in claim 1 is characterized in that: be provided with thermal insulation layer on the described fuel tank, effective heat-insulation and heat-preservation reduces the temperature variation of transformer oil.
8. a kind of transformer oil pump test device as claimed in claim 1 is characterized in that: be provided with oily filtrating equipment on the described test pipeline, be used for impurity in the eliminating transformer oil, to guarantee the normal operation of whole transformer oil pump test device.
9. transformer oil pump test method is characterized in that: comprise following committed step:
Step 1, select a cover test pipeline according to the model of oil pump tested, then oil pump tested is installed on this test pipeline, and the sealing of checkout pipeline;
Step 2, startup oil pump tested, oil pump tested is extracted transformer oil out by inlet tube from lower fuel tank, transformer oil returns top tank by outer pipe after pressurizeing through oil pump tested, the oil of top tank flows to lower fuel tank by the pipeline that the bottom is connected with lower fuel tank, for test pump, form a complete transformer oil circulation loop;
Step 3, get rid of the air of transformer oil pump test device inside by being installed in outlet valve on the outlet pipe, form the experimental enviroment of a sealing and circulating;
Step 4, after oil pump tested works well, measure the rotating speed of oil pump tested motor by stroboscope;
Step 5, measure the lift of oil pump tested and reference axis power by pressure test device;
Step 6, the flow by the flowmeter survey oil pump tested;
Step 7, off-test, deenergization cuts out butterfly valve, and clearness test is on-the-spot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310284298.9A CN103306968B (en) | 2013-07-08 | 2013-07-08 | transformer oil pump test device and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310284298.9A CN103306968B (en) | 2013-07-08 | 2013-07-08 | transformer oil pump test device and test method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103306968A true CN103306968A (en) | 2013-09-18 |
| CN103306968B CN103306968B (en) | 2015-09-02 |
Family
ID=49132560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310284298.9A Active CN103306968B (en) | 2013-07-08 | 2013-07-08 | transformer oil pump test device and test method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103306968B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112567A (en) * | 2014-06-26 | 2014-10-22 | 江苏宏源电气有限责任公司 | High-heat-dissipation oil-immersed transformer |
| CN104568490A (en) * | 2015-01-09 | 2015-04-29 | 无锡佳龙换热器股份有限公司 | Oil circulation system for heat exchanger performance test |
| CN105372050A (en) * | 2015-11-30 | 2016-03-02 | 江苏大学 | Test device of jet pump |
| CN110890199A (en) * | 2019-10-21 | 2020-03-17 | 中国电力科学研究院有限公司 | Large-scale converter transformer oil tank for fire extinguishing test |
| CN111141341A (en) * | 2019-12-31 | 2020-05-12 | 华东理工大学 | Compensation method of turbine flowmeter, system and storage medium thereof |
| CN113464417A (en) * | 2021-06-24 | 2021-10-01 | 西安阿尔斯通永济电气设备有限公司 | Oil pump lift experimental device |
| CN114151361A (en) * | 2021-11-30 | 2022-03-08 | 浙江方威检验检测技术有限公司 | Factory-leaving detection system for water pump manufacturing automation factory |
| CN115030890A (en) * | 2021-03-04 | 2022-09-09 | 上海海立电器有限公司 | Fluorine pump performance test system and control method |
| US11674519B2 (en) | 2019-06-21 | 2023-06-13 | State Grid Shanxi Electric Power Research Institute | Method and device for evaluating long-term operation of transformer oil pump |
| CN115030890B (en) * | 2021-03-04 | 2024-04-26 | 上海海立电器有限公司 | Fluorine pump performance test system and control method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980045503U (en) * | 1996-12-27 | 1998-09-25 | 추호석 | Heavy Engine Engine Optimization System |
| CN2929254Y (en) * | 2006-08-01 | 2007-08-01 | 中国铝业股份有限公司 | Detector for cracked diaphragm of diaphragm pump |
| CN201236786Y (en) * | 2008-08-07 | 2009-05-13 | 大庆油田力神泵业有限公司 | Performance detection testing bench for screw pump |
| CN201763590U (en) * | 2010-07-23 | 2011-03-16 | 北京航天动力研究所 | Closed type test device suitable for various oil pumps |
| CN201891592U (en) * | 2010-12-10 | 2011-07-06 | 湖南机油泵股份有限公司 | Engine oil pump detection system |
| CN202381315U (en) * | 2011-12-30 | 2012-08-15 | 桂林福达股份有限公司 | Maintenance test platform for oil pump |
| CN203335372U (en) * | 2013-07-08 | 2013-12-11 | 株洲市荣达铁路机电有限公司 | Transformer oil pump testing device |
-
2013
- 2013-07-08 CN CN201310284298.9A patent/CN103306968B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980045503U (en) * | 1996-12-27 | 1998-09-25 | 추호석 | Heavy Engine Engine Optimization System |
| CN2929254Y (en) * | 2006-08-01 | 2007-08-01 | 中国铝业股份有限公司 | Detector for cracked diaphragm of diaphragm pump |
| CN201236786Y (en) * | 2008-08-07 | 2009-05-13 | 大庆油田力神泵业有限公司 | Performance detection testing bench for screw pump |
| CN201763590U (en) * | 2010-07-23 | 2011-03-16 | 北京航天动力研究所 | Closed type test device suitable for various oil pumps |
| CN201891592U (en) * | 2010-12-10 | 2011-07-06 | 湖南机油泵股份有限公司 | Engine oil pump detection system |
| CN202381315U (en) * | 2011-12-30 | 2012-08-15 | 桂林福达股份有限公司 | Maintenance test platform for oil pump |
| CN203335372U (en) * | 2013-07-08 | 2013-12-11 | 株洲市荣达铁路机电有限公司 | Transformer oil pump testing device |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112567A (en) * | 2014-06-26 | 2014-10-22 | 江苏宏源电气有限责任公司 | High-heat-dissipation oil-immersed transformer |
| CN104568490A (en) * | 2015-01-09 | 2015-04-29 | 无锡佳龙换热器股份有限公司 | Oil circulation system for heat exchanger performance test |
| CN105372050A (en) * | 2015-11-30 | 2016-03-02 | 江苏大学 | Test device of jet pump |
| US11674519B2 (en) | 2019-06-21 | 2023-06-13 | State Grid Shanxi Electric Power Research Institute | Method and device for evaluating long-term operation of transformer oil pump |
| CN110890199A (en) * | 2019-10-21 | 2020-03-17 | 中国电力科学研究院有限公司 | Large-scale converter transformer oil tank for fire extinguishing test |
| CN111141341A (en) * | 2019-12-31 | 2020-05-12 | 华东理工大学 | Compensation method of turbine flowmeter, system and storage medium thereof |
| CN115030890A (en) * | 2021-03-04 | 2022-09-09 | 上海海立电器有限公司 | Fluorine pump performance test system and control method |
| CN115030890B (en) * | 2021-03-04 | 2024-04-26 | 上海海立电器有限公司 | Fluorine pump performance test system and control method |
| CN113464417A (en) * | 2021-06-24 | 2021-10-01 | 西安阿尔斯通永济电气设备有限公司 | Oil pump lift experimental device |
| CN113464417B (en) * | 2021-06-24 | 2023-01-03 | 西安阿尔斯通永济电气设备有限公司 | Oil pump lift experimental device |
| CN114151361A (en) * | 2021-11-30 | 2022-03-08 | 浙江方威检验检测技术有限公司 | Factory-leaving detection system for water pump manufacturing automation factory |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103306968B (en) | 2015-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103306968B (en) | transformer oil pump test device and test method thereof | |
| CN203335372U (en) | Transformer oil pump testing device | |
| CN202075022U (en) | On-line real-flow verification device for small natural gas flow meter | |
| CN204301824U (en) | A kind of aircraft oil scale in situ detection device | |
| CN207394379U (en) | City steam line blocks and leakage simulation detection system | |
| CN103954431A (en) | Flow resistance measurement test system | |
| CN108050394A (en) | Fuel gas pipeline leakage based on sound pressure signal identification detects positioning experiment platform | |
| CN202166537U (en) | Cooling nozzle targeting testing device | |
| CN203688174U (en) | Device capable of onsite detecting transformer oil leakage and gas relay alarm performance | |
| CN102889906A (en) | Single-pipe gas relay detecting bench, centering clamping mechanism and detection method thereof | |
| CN102866008A (en) | Low-redundancy high-reliability intelligent checking device for safety valves and checking method utilizing checking device | |
| CN101349604B (en) | Apparatus and method for testing and monitoring pipe real time pressure | |
| CN101718628B (en) | Air intake management and test system for internal combustion engine | |
| CN203069372U (en) | Valve testing device in vacuum environment | |
| CN103048616A (en) | Live calibration device for SF6 (sulfur hexafluoride) density relay | |
| CN201876391U (en) | Test bench for testing water pressure strength of cylinder | |
| CN203981382U (en) | Large flow pneumatic accessories testing table | |
| CN104501917B (en) | Super large caliber sonic nozzle group formula gas flowmeter calibrating installation | |
| CN202903461U (en) | Low-redundancy high-reliability intelligent checking device for safety valve | |
| CN202836631U (en) | Single-pipe buchholz relay detecting platform and centring clamping mechanism special for buchholz relay detection | |
| CN204855152U (en) | Online calibration equipment of portable safety valve | |
| CN203117384U (en) | SF6 density relay live-line verification device | |
| CN103091027A (en) | Liquid pipeline equipment flowing pressure loss tester and testing method | |
| CN214748332U (en) | Novel gas flow verification device for loop | |
| CN202994400U (en) | Box gas leakage detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 412001 No. 104 Hongqi North Road, Shifeng District, Zhuzhou City, Hunan Province Patentee after: Zhuzhou Rongda electric Limited by Share Ltd Address before: 412001 No. 104 Hongqi North Road, Shifeng District, Zhuzhou City, Hunan Province Patentee before: Zhuzhou Rongda Railway Electromechanical Co., Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 412000 Xinma Power Innovation Park Phase 3 and Phase 1, Building D2 102, 202 and 302, Xianyue Ring Road 899, Tianyuan District, Zhuzhou City, Hunan Province Patentee after: Zhuzhou Rongda electric Limited by Share Ltd Address before: 412001 No. 104 Hongqi North Road, Shifeng District, Zhuzhou City, Hunan Province Patentee before: Zhuzhou Rongda electric Limited by Share Ltd |