CN103306968B - transformer oil pump test device and test method thereof - Google Patents

transformer oil pump test device and test method thereof Download PDF

Info

Publication number
CN103306968B
CN103306968B CN201310284298.9A CN201310284298A CN103306968B CN 103306968 B CN103306968 B CN 103306968B CN 201310284298 A CN201310284298 A CN 201310284298A CN 103306968 B CN103306968 B CN 103306968B
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.)
Active
Application number
CN201310284298.9A
Other languages
Chinese (zh)
Other versions
CN103306968A (en
Inventor
黄立新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhuzhou Rongda electric Limited by Share Ltd
Original Assignee
ZHUZHOU RONGDA RAILWAY ELECTROMECHANICAL CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZHUZHOU RONGDA RAILWAY ELECTROMECHANICAL CO Ltd filed Critical ZHUZHOU RONGDA RAILWAY ELECTROMECHANICAL CO Ltd
Priority to CN201310284298.9A priority Critical patent/CN103306968B/en
Publication of CN103306968A publication Critical patent/CN103306968A/en
Application granted granted Critical
Publication of CN103306968B publication Critical patent/CN103306968B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses a kind of transformer oil pump test device and test method thereof, transformer oil pump test device comprises fuel tank and is connected to two cover test pipelines on fuel tank; Described fuel tank is by just to arrange and the top tank be interconnected and lower fuel tank form; Described two to overlap the caliber of the test pipeline be arranged in parallel different, and pipe diameter size matches with tested oil pump, adapts to different bore oil pump respectively, to meet 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 the oil pump tested on described inlet tube, outer pipe; The present invention has simulated electric locomotive transformer oil circulating system, to meet the needs of transformer oil pump delivery test and type approval test; Adopt the test pipe of two cover different tube diameters, the test needs of the various oil pump of two kinds of bores can be met simultaneously, substantially increase the Applicable scope of oil pump testing device.

Description

Transformer oil pump test device and test method thereof
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 comprehensively must check quality of product, performance, to identify whether product meets relevant country and company standard.At present, the transformer oil pump of electric locomotive tests the electrical properties and hydraulic performance test of mainly carrying out oil pump before dispatching from the factory, and whether meets requirement of dispatching from the factory to check the property indices of transformer oil pump oil pump; Another important use of oil pump testing device carries out type approval test to the novel oil pump of design research and development, whether meets the designing requirement of oil pump with the electrical properties and hydraulic performance of verifying the oil pump of new research and development.Therefore, need to design a kind of can the transformer oil pump test device of the actual operating conditions of analogue transformer oil pump on electric locomotive transformer, simulate electric locomotive transformer oil circulating system, to meet 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, provides a kind of transformer oil pump test device and test method thereof, to meet 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 two cover test pipelines on fuel tank; Described fuel tank is by just to arrange and the top tank be interconnected and lower fuel tank form, and the import of described test pipeline connects described lower fuel tank, and the outlet of described test pipeline connects described top tank; Described two to overlap the caliber of the test pipeline be arranged in parallel different, and pipe diameter size matches with tested oil pump, adapts to different bore oil pump respectively, to meet 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 the oil pump tested on described inlet tube, outer pipe; Described inlet tube is connected between described lower fuel tank and oil pump tested, and described outer pipe is connected between described top tank and oil pump tested; Be connected with pipeline regulating butterfly valve between described lower fuel tank and oil pump tested, between described top tank and oil pump tested, be connected with flowmeter and pipeline regulating butterfly valve in turn; Described pressure test device comprises U-tube pressure gauge, import pressure measurement ring and outlet pressure measurement ring, described import pressure measurement ring is arranged on oil pump tested suction side, described outlet oil pump is arranged on oil pump tested outlet side, described import pressure measurement ring is connected with described U-tube pressure gauge, for measuring the lift of oil pump tested respectively with outlet pressure measurement ring; Described flowmeter and turbine conveyer-flow indicating integrator are connected, the flow of test oil pump tested; Described pipeline regulating butterfly valve is electric butterfly valve, quickly and easily the switch of Adjustment Tests pipeline.
In the present invention, described top tank and lower fuel tank top are respectively arranged with an outlet pipe, described outlet pipe are provided with an outlet valve, 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 pump.
In the present invention, described test pipeline is provided with one section of bellows, is absorbed in for compensating the distortion and vibration that pipeline occurs due to compression shock, effectively ensure that testing precision.
In the present invention, described test pipeline is provided with a stroboscope, for measuring the rotating speed of oil pump tested.
In the present invention, in described fuel tank, be provided with device for heating transformer oil, so as the transformer oil oil temperature simulated more accurately under actual operating conditions and external temperature too low time ensure the stickiness of transformer oil.
In the present invention, described fuel tank is provided with thermal insulation layer, can effective heat-insulation and heat-preservation, reduce the temperature variation of transformer oil.
In the present invention, described test pipeline is provided with oily filtrating equipment, the impurity be used in eliminating transformer oil, to ensure the normal operation of whole transformer oil pump test device.
The present invention also provides a kind of and utilizes above-mentioned transformer oil pump test device to carry out simulating electric locomotive main transformer oil circulating system thus a kind of transformer oil pump test method of carrying out transformer oil pump testing, comprises following committed step:
Step 1, select a set of 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, transformer oil is extracted out by inlet tube by oil pump tested from lower fuel tank, transformer oil returns top tank by outer pipe after oil pump tested pressurization, the pipeline that the oil of top tank is connected with lower fuel tank by bottom flows to lower fuel tank, for test pump, form a complete transformer oil circulation loop;
Step 3, getting rid of the air of transformer oil pump test device inside by being arranged on outlet valve on outlet pipe, forming the experimental enviroment of a sealing and circulating;
Step 4, after oil pump tested works well, measured the rotating speed of oil pump tested motor by stroboscope;
Step 5, measure the lift of oil pump tested by pressure test device, and calculate air horsepower;
Step 6, flow by flowmeter survey oil pump tested;
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 owing to adopting above technological scheme, and compared with oil pump testing device of the prior art, its good effect produced is obvious:
1), the present invention simulated the working environment of electric locomotive transformer oil circulating system, and oil pump tested and lower fuel tank are at same level line, and the caliber of test pipeline is identical with electric locomotive transformer transport pipe caliber, ensure that test accuracy;
2), the present invention adopts the test pipeline of two cover different tube diameters simultaneously, can meet the test needs of the various oil pump of two kinds of bores simultaneously, substantially increase the Applicable scope of oil pump testing device, reduce cost;
3), the design of the experimental enviroment of sealing and circulating can get rid of external interference to greatest extent to testing the error brought, and avoids environment simultaneously;
4), the present invention by pipeline regulating butterfly valve control transformer oil pump testing device, stable, adjustable operation of oil pump pressure environment is provided;
5), test method of the present invention be easy to realize, highly versatile, be convenient to test oil pump performance.
Accompanying drawing explanation
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.
In figure: 1. oil pump tested, 2. lower fuel tank, 3. U-tube pressure gauge, 4. exports pressure measurement ring, 5. outlet valve, 6. outlet pipe, 7. the first test pipeline, 8. the second test pipeline, 9. top tank, 10. outer pipe, 11. electric butterfly valves, 12. flowmeters, 13. bellowss, 14. inlet tubes, 15. import pressure measurement rings.
Embodiment
The object, technical solutions and advantages of the present invention can be well understood to further by specific embodiments of the invention given below.But they are not limitation of the invention.
As shown in drawings, embodiment one, a kind of transformer oil pump test device, comprises fuel tank and is connected to the first test pipeline 7 and the second test pipeline 8 on fuel tank; Fuel tank is by just to arrange and the top tank 9 be interconnected and lower fuel tank 2 form, two fuel tank configuration not only increases the total amount that fuel tank holds transformer oil, meet the test needs of large discharge oil pump, and in experimentation, oil return has certain kinetic energy to the transformer oil of fuel tank, direct circulation enters test pipeline and can have a negative impact to testing precision, oil return enters lower fuel tank 2 to the transformer oil of fuel tank again after the transition through top tank 9, ensure that the oil pressure of the transformer oil entering test pipeline is stablized, and then the precision of proof test result; 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 top are respectively arranged with an outlet pipe 6, outlet pipe 6 is provided with an outlet valve 5, 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 impact of external environment condition change on test result; Two to overlap the caliber of the test pipeline be arranged in parallel 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 different bore oil pump respectively, to meet the test needs of different model oil pump tested 1; Test pipeline comprises inlet tube 14, outer pipe 10, and is arranged on flowmeter 12, pipeline regulating butterfly valve, pressure test device and the oil pump tested 1 on inlet tube 14, outer pipe 10; Inlet tube 14 is connected between lower fuel tank 2 and oil pump tested 1, and outer pipe 10 is connected between top tank 9 and oil pump tested 1; Pipeline regulating butterfly valve is connected with between lower fuel tank 2 and oil pump tested 1, flowmeter 12 and pipeline regulating butterfly valve is connected with in turn between top tank 9 and oil pump tested 1, the outer pipe 10 of test pipeline is provided with one section of bellows 13, the distortion and vibration that pipeline occurs due to compression shock is absorbed in for compensating, effectively ensure that testing precision, test pipeline is provided with oily filtrating equipment, the impurity be used in eliminating transformer oil, to ensure the normal operation of whole transformer oil pump test device; Pressure test device comprises U-tube pressure 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, outlet oil pump is arranged on oil pump tested 1 outlet side, import pressure measurement ring 15 is connected with U-tube pressure gauge 3, for measuring the lift of oil pump tested 1 respectively with outlet pressure measurement ring 4; Flowmeter 12 and turbine conveyer-flow indicating integrator are connected, the flow of test oil pump tested 1; Pipeline regulating butterfly valve is electric butterfly valve 11, quickly and easily the switch of Adjustment Tests pipeline; Test pipeline is provided with a stroboscope, for measuring the rotating speed of oil pump tested 1, thus records the various performance parameters of transformer oil pump, completing the test of transformer oil pump.
Embodiment two, be in fuel tank, to be provided with device for heating transformer oil and thermal insulation layer with the difference of embodiment one, can effective heat-insulation and heat-preservation, so that the transformer oil oil temperature simulated more accurately under actual operating conditions and external temperature too low time ensure the stickiness of transformer oil, with proof test precision.
Embodiment three, and the present invention also provides a kind of and utilizes above-mentioned transformer oil pump test device to carry out simulating electric locomotive main transformer oil circulating system thus a kind of transformer oil pump test method of carrying out transformer oil pump testing, comprises following committed step:
Step 1, select a set of test pipeline according to the model of oil pump tested 1, then oil pump tested 1 is installed on this test pipeline, and the sealing of checkout pipeline;
Step 2, startup oil pump tested 1, transformer oil is extracted out by inlet tube 14 by oil pump tested 1 from lower fuel tank 2, transformer oil returns top tank 9 by outer pipe 10 after oil pump tested 1 pressurizes, the pipeline that the oil of top tank 9 is connected with lower fuel tank 2 by bottom flows to lower fuel tank 2, for test pump 1, form a complete transformer oil circulation loop;
Step 3, got rid of the air of transformer oil pump test device inside by the outlet valve 5 be arranged on outlet pipe 6, form the experimental enviroment of a sealing and circulating;
Step 4, after oil pump tested 1 works well, measured the rotating speed of oil pump tested 1 motor by stroboscope;
Step 5, measure the lift of oil pump tested 1 by pressure test device, and calculate air horsepower;
Step 6, measured the flow of oil pump tested 1 by flowmeter 12;
Step 7, off-test, oil-break, power-off.
The present invention has simulated the working environment of electric locomotive transformer oil circulating system, oil pump tested is arranged on the position in simulation electric locomotive main transformer oil circulating system, with lower fuel tank at 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 is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles 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 two cover test pipelines on fuel tank; Described fuel tank is by just to arrange and the top tank be interconnected and lower fuel tank form, and the import of described test pipeline connects described lower fuel tank, and the outlet of described test pipeline connects described top tank; Described two to overlap the caliber of the test pipeline be arranged in parallel different, and pipe diameter size matches with tested oil pump, adapts to different bore oil pump respectively, to meet 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 the oil pump tested on described inlet tube, outer pipe; Described inlet tube is connected between described lower fuel tank and oil pump tested, and described outer pipe is connected between described top tank and oil pump tested; Be connected with pipeline regulating butterfly valve between described lower fuel tank and oil pump tested, between described top tank and oil pump tested, be connected with flowmeter and pipeline regulating butterfly valve in turn; Described pressure test device comprises U-tube pressure gauge, import pressure measurement ring and outlet pressure measurement ring, described import pressure measurement ring is arranged on oil pump tested suction side, described outlet pressure measurement ring is arranged on oil pump tested outlet side, described import pressure measurement ring is connected with described U-tube pressure gauge, for measuring the lift of oil pump tested respectively with outlet pressure measurement ring; Described flowmeter and turbine conveyer-flow indicating integrator are connected, the flow of test oil pump tested; Described pipeline regulating butterfly valve is electric butterfly valve, quickly and easily the switch of Adjustment Tests pipeline.
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, described outlet pipe is provided with an outlet valve, for getting rid of the air of transformer oil pump test 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 pump.
4. a kind of transformer oil pump test device as claimed in claim 1, is characterized in that: described test pipeline is provided with one section of bellows, being absorbed in the distortion and vibration that pipeline occurs due to compression shock, effectively ensure that testing precision for compensating.
5. a kind of transformer oil pump test device as claimed in claim 1, is characterized in that: described test pipeline is provided with a stroboscope, 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: in described fuel tank, be provided with device for heating transformer oil, so as the transformer oil oil temperature simulated more accurately under actual operating conditions and external temperature too low time ensure the stickiness of transformer oil.
7. a kind of transformer oil pump test device as claimed in claim 1, is characterized in that: described fuel tank is provided with thermal insulation layer, can 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: described test pipeline is provided with oily filtrating equipment, the impurity be used in eliminating transformer oil, to ensure the normal operation of whole transformer oil pump test device.
9. a transformer oil pump test method, is characterized in that: comprise following committed step:
Step 1, select a set of 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, transformer oil is extracted out by inlet tube by oil pump tested from lower fuel tank, transformer oil returns top tank by outer pipe after oil pump tested pressurization, the pipeline that the oil of top tank is connected with lower fuel tank by bottom flows to lower fuel tank, for oil pump tested, form a complete transformer oil circulation loop;
Step 3, getting rid of the air of transformer oil pump test device inside by being arranged on outlet valve on outlet pipe, forming the experimental enviroment of a sealing and circulating;
Step 4, after oil pump tested works well, measured the rotating speed of oil pump tested motor by stroboscope;
Step 5, measure the lift of oil pump tested by pressure test device, and calculate air horsepower;
Step 6, flow by flowmeter survey oil pump tested;
Step 7, off-test, deenergization, cuts out butterfly valve, and clearness test is on-the-spot.
CN201310284298.9A 2013-07-08 2013-07-08 transformer oil pump test device and test method thereof Active CN103306968B (en)

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 CN103306968A (en) 2013-09-18
CN103306968B true 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)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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
CN110890199B (en) * 2019-10-21 2021-11-16 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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980045503U (en) * 1996-12-27 1998-09-25 추호석 Heavy Engine Engine Optimization System

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
CN103306968A (en) 2013-09-18

Similar Documents

Publication Publication Date Title
CN103306968B (en) transformer oil pump test device and test method thereof
CN107355684B (en) A kind of method accident of pipeline network waterpower monitoring experimental system and its realize fault identification
CN203335372U (en) Transformer oil pump testing device
CN201803832U (en) Tester using acoustic emission signals to detect valve leakage
CN204085645U (en) With the gas flow standard device of self calibration structure
CN204301824U (en) A kind of aircraft oil scale in situ detection device
CN103954431A (en) Flow resistance measurement test system
CN207394379U (en) City steam line blocks and leakage simulation detection system
CN202075022U (en) On-line real-flow verification device for small natural gas flow meter
CN102866008A (en) Low-redundancy high-reliability intelligent checking device for safety valves and checking method utilizing checking device
CN204228242U (en) A kind of flow measurement electricity testing device
CN108050394A (en) Fuel gas pipeline leakage based on sound pressure signal identification detects positioning experiment platform
CN203551272U (en) Safety valve test and verification apparatus regulating pressure by use of pressure regulator
CN203069372U (en) Valve testing device in vacuum environment
CN104931266A (en) Aircraft engine fuel oil simulation control system and adjusting method
CN203981382U (en) Large flow pneumatic accessories testing table
CN101349604B (en) Apparatus and method for testing and monitoring pipe real time pressure
CN201387355Y (en) Detection device for automobile air-flow meter
CN203465038U (en) Large-caliber-calorimeter calibrating device
CN110470569A (en) A kind of capillary pipeline vapour lock measuring device and measuring method
CN201876391U (en) Test bench for testing water pressure strength of cylinder
CN102889906A (en) Single-pipe gas relay detecting bench, centering clamping mechanism and detection method thereof
CN202836631U (en) Single-pipe buchholz relay detecting platform and centring clamping mechanism special for buchholz relay detection
CN202903461U (en) Low-redundancy high-reliability intelligent checking device for safety valve
CN203534679U (en) Correction system of orifice plate flow meter

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

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.

CP01 Change in the name or title 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

CP02 Change in the address of a patent holder