CN201190820Y - Checkout platform for pressure release valve - Google Patents
Checkout platform for pressure release valve Download PDFInfo
- Publication number
- CN201190820Y CN201190820Y CNU2007200909791U CN200720090979U CN201190820Y CN 201190820 Y CN201190820 Y CN 201190820Y CN U2007200909791 U CNU2007200909791 U CN U2007200909791U CN 200720090979 U CN200720090979 U CN 200720090979U CN 201190820 Y CN201190820 Y CN 201190820Y
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- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000012795 verification Methods 0.000 description 14
- 230000009471 action Effects 0.000 description 7
- 238000005336 cracking Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
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Abstract
The utility model relates to a pressure relief valve checking table, which can simulate the mechanism of a pressure relief valve checking table when a transformer has internal accident and adopt single chip measuring and control technology. The pressure relief valve checking table comprises a pressure relief valve checking test air circuit, a hydraulic press mechanism and a single chip control system, wherein a pressure test pot is provided with a pressure sensor, a discharge electromagnetic valve and a safety valve, the air inlet of the pressure test pot is connected with a large air inlet increment electromagnetic valve, a small air inlet increment electromagnetic valve, a checking table air inlet and an air compressor via air tubes, a hydraulic power unit with a direction control valve is connected with a hydraulic cylinder via an oil tube, a single chip system is provided at the back of a liquid crystal screen. The utility model has the advantages that the pressure relief valve checking table can simulate the mechanism of a pressure relief valve checking table when a transformer has internal accident and adopt single chip measuring and control technology, to test the start and close pressure values and the seal property of the pressure relief valves of different apertures, different types and different manufacturers via one test gas pot.
Description
Technical field
The utility model belongs to a kind of pressure relief valve check table, be specifically related to a kind of when the analogue transformer internal fault action mechanism of pressure relief valve, adopt the scm observe and control technology, use single test gas tank to finish the pressure relief valve check table that domestic and international various different bores, different model, the unlatching of different manufacturers pressure relief valve, closing pressure value and sealability detect.
Background technique
At present, power equipments such as widely used liquid or gas isolated transformer, power capacitor, high-voltage switch gear, loaded switch have mostly adopted by the setting pressure relief valve and have realized the level pressure protection in the electric power system.When these inside electric appliances have an accident, its internal pressure can sharply raise, when pressure is elevated to the pressure relief valve cracking pressure, pressure relief valve is opened rapidly at short notice, its internal pressure is fallen in abrupt release, pressure in the electrical equipment is reduced rapidly, and in time send malfunction alarm.When pressure is reduced to the closing pressure value of pressure relief valve; pressure relief valve is reliably closed again; make and keep certain malleation in the casing forever; prevent that effectively outside air, aqueous vapor and other impurity from entering in the casing; thereby play the purpose of protection electrical equipment, improved the safety reliability of power equipment operation.
The reliability of pressure relief valve protection depends on the accurate detection to pressure relief valve.For many years, because the restriction of detection facility and detection means, electric power accident that cause happens occasionally by the pressure relief valve action is malfunctioning.How accurately the parameters of inspection pressure relief valve has become related personnel's extensive concern and questions of common interest such as Operation of Electric Systems, maintenance, test, also is to be engaged in the problem that electric power detection facility development and production producer pays close attention to.
The pressure relief valve check table is the special device at the employed pressure relief valve verification of electric power system, at present domestic that pressure relief valve is carried out the test method and the testing precision of verification is relatively backward, and similar products are mainly containing following problem aspect the verification of pressure relief valve:
In configuration aspects: because existing pressure relief valve check table is when carrying out pressure relief valve open and close pressure checking, different mining according to pressure relief valve oil spout bore is tried jar with not isometric pressure, generally need to adopt 3～4 pressure examination jars could satisfy the verification of wirking pressure relief valve, make device structure complexity, bulky, operating process is loaded down with trivial details, and can't verification to the pressure relief valve of part oil spout bore.
Aspect the clamping of tested pressure relief valve: the pressure relief valve check table all adopted manual operations when tested pressure relief valve clamping in the past, with bolt the flange of tested pressure relief valve and pressure examination jar is coupled together, and the verification of finishing a pressure relief valve needs repeatedly to install, the labor intensity height, length consuming time, working efficiency are extremely low, and the clamping unbalance stress, easily gas leakage influences test accuracy.The pressure relief valve of different installation dimensions need be joined different assembly flanges, and flange is wide in variety, and it is big to take up room.
Aspect data read: owing to adopt manual read's pressure power relief valve action pressure tabular value of moment in the checking procedure, though data display is directly perceived, but compole is short during owing to the pressure relief valve breakdown action, everyone judge pressure relief valve action opportunity, the time of reading, watch the difference of pointer angle and pressure gauge precision, these factors all certainly will influence the verification accuracy and the repeatability of pressure relief valve, and testing precision is low.
In operating aspect: the mechanism of One's name is legion has caused the complicated operations system, and operating table takes up room greatly, and button is many, complicated operation, and the chance of misoperation is big.
Summary of the invention
The purpose of this utility model is to overcome deficiency of the prior art and provides a kind of by Single-chip Controlling, try the test that can system is finished domestic and international various different bores, different model, different manufacturers pressure relief valve with a pressure, adopt the pressure relief valve check table of hydraulic pressure hold-down mechanism when tested pressure relief valve is installed.
The purpose of this utility model is achieved in that and comprises pressure relief valve check test gas circuit, hydraulic pressure hold-down mechanism and single-chip computer control system:
Pressure relief valve check test gas circuit comprises that pressure examination jar, pressure try on the jar pressure transducer, pressure-releasing electromagnetic valve, safety valve to be installed, the suction port of pressure examination jar is connected with big air inlet increment solenoid valve, little air inlet increment solenoid valve respectively by tracheae, big air inlet increment solenoid valve, little air inlet increment solenoid valve are connected with the check table suction port, and the check table suction port is connected with air compressor by tracheae; The air outlet of pressure examination jar is bolted to connection with the working platform that the hydraulic pressure hold-down mechanism is housed; The hydraulic pressure hold-down mechanism is installed on the testing pressure relief valve on the working platform that the hydraulic pressure hold-down mechanism is housed by O type circle, counter flange, and power supply is connected with air compressor with big air inlet increment solenoid valve, little air inlet increment solenoid valve, pressure-releasing electromagnetic valve respectively;
The hydraulic pressure hold-down mechanism comprises the hydraulic power unit that has position control valve, the hydraulic power unit one end hydraulic fluid port that has position control valve is connected with an end hydraulic fluid port of oil hydraulic cylinder by oil pipe, the other end hydraulic fluid port of oil hydraulic cylinder links to each other with the other end hydraulic fluid port of the hydraulic power unit that has position control valve by oil pipe, the depression bar body is equipped with on the piston rod top of oil hydraulic cylinder, on the depression bar body operating grip is housed, power supply is connected with the hydraulic power unit that has position control valve;
Single-chip computer control system comprises that SCM system, SCM system are installed in the rear side of liquid crystal screen panel of living in, and SCM system links to each other with big air inlet increment solenoid valve, little air inlet increment solenoid valve, pressure transducer, pressure-releasing electromagnetic valve, printer, keyboard, liquid crystal screen respectively; SCM system is connected with power supply.
Described oil hydraulic cylinder is at least three.Described oil hydraulic cylinder in parallel with have on the hydraulic power unit of position control valve.Described pressure examination jar, safety valve, the working platform that the hydraulic pressure hold-down mechanism is housed, oil hydraulic cylinder, the hydraulic power unit that has position control valve, big air inlet increment solenoid valve, little air inlet increment solenoid valve, pressure transducer, pressure-releasing electromagnetic valve, SCM system, check table air inlet connections are installed in the housing.The described button, release button, liquid crystal screen, printer, keyboard of compressing is installed on the panel.
The utility model has following characteristics:
1, the utility model device utilizes advanced microcomputer measuring and controlling technology, by setting up test database perfect, that be applicable to domestic and international various different bores, different model, different manufacturers pressure relief valve, adopt pressure examination jar, different counter flange and transit joint, realize that clamping finishes the verification of the pressure relief valve cracking pressure value of domestic and international various different bores, different model, different manufacturers, closing pressure value, sealability.Have advantages such as volume is little, in light weight, floor space is little.
The action mechanism of pressure relief valve when 2, the utility model device is by the analogue transformer internal fault, the size of control air inflow progressively raises verification pressure, SCM system is gathered pressure examination jar interior pressure in real time by pressure transducer, automatically finish pressure relief valve cracking pressure value, closing pressure value and sealability test, thoroughly solved the low problem of testing precision of getting the numerical value on the pressure gauge by the manual read in the past and causing, have checking precision height, test accurately, advantage such as good reproducibility.
3, the tested pressure relief valve of the utility model device clamping adopts the hydraulic pressure hold-down mechanism, and cooperates flange and the transit joint that is equipped with at random, has realized the easy clamping test of all kinds pressure relief valves.Have rapid operation save time, make things convenient for, stressed evenly, characteristics such as low, the reliable performance of high working efficiency, labor intensity.
4, the utility model device adopts Single-chip Controlling, the full Chinese interface of liquid crystal shows, keyboard operation has microcomputer function such as test and automatic printing automatically, can finish cracking pressure value, closing pressure value and experiments of sealing performance automatically to being provided with of test parameters according to test requirements document and client.Have the automaticity height, operation interface is directly perceived, simple, characteristics such as flexible and convenient operation.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a left view of the present utility model.
Fig. 3 is a plan view of the present utility model.
Fig. 4 is a kind of pressure relief valve mounting structure figure of the present utility model.
Fig. 5 is another kind of pressure relief valve mounting structure figure of the present utility model.
Fig. 6 is a hold-down mechanism structural drawing of the present utility model.
Fig. 7 is a fundamental diagram of the present utility model.
Embodiment
Shown in Fig. 1,2,3,6,7, pressure relief valve check test gas circuit, hydraulic pressure hold-down mechanism and the single-chip computer control system of comprising of the present utility model:
Pressure relief valve check test gas circuit comprises that pressure examination jar 1, pressure try on the jar 1 pressure transducer 16, pressure-releasing electromagnetic valve 19, safety valve 2 to be installed, the suction port of pressure examination jar 1 is connected with big air inlet increment solenoid valve 15, little air inlet increment solenoid valve 14 respectively by tracheae, big air inlet increment solenoid valve 15, little air inlet increment solenoid valve 14 are connected with check table suction port 18, and check table suction port 18 is connected with air compressor 12 by tracheae; The air outlet of pressure examination jar 1 is bolted to connection with the working platform 3 that the hydraulic pressure hold-down mechanism is housed; The hydraulic pressure hold-down mechanism is installed on testing pressure relief valve 5 on the working platform 3 that the hydraulic pressure hold-down mechanism is housed by seal ring 23, counter flange 21, power supply is connected with air compressor 12 with big air inlet increment solenoid valve 15, little air inlet increment solenoid valve 14, pressure-releasing electromagnetic valve 19 respectively;
The hydraulic pressure hold-down mechanism comprises the hydraulic power unit 13 that has position control valve, the hydraulic power unit 13 1 end hydraulic fluid ports that have position control valve are connected with an end hydraulic fluid port of oil hydraulic cylinder 4 by oil pipe, the other end hydraulic fluid port of oil hydraulic cylinder 4 links to each other by the other end hydraulic fluid port of oil pipe with the hydraulic power unit 13 that has position control valve, depression bar body 24 is equipped with on the piston rod top of oil hydraulic cylinder 4, operating grip 25 is housed on the depression bar body 24, and power supply is connected with the hydraulic power unit 13 that has position control valve;
Single-chip computer control system comprises that SCM system 20, SCM system 20 are installed in the rear side of liquid crystal screen 8 panels 11 of living in, and SCM system 20 links to each other with big air inlet increment solenoid valve 15, little air inlet increment solenoid valve 14, pressure transducer 16, pressure-releasing electromagnetic valve 19, printer 9, keyboard 10, liquid crystal screen 8 respectively; SCM system 20 is connected with power supply.
Described oil hydraulic cylinder 4 is at least three.Described oil hydraulic cylinder 4 in parallel with have on the hydraulic power unit 13 of position control valve.
Described SCM system 20 is used for the big air inlet increment of observing and controlling solenoid valve 15, little air inlet increment solenoid valve 14, pressure transducer 16 pressure-releasing electromagnetic valves 19, printer 9.SCM system 20, the hydraulic power unit 13 that has a position control valve are connected with power supply.
The action of described hydraulic pressure hold-down mechanism is finished by compress button 6, release button 7 and SCM system 20 controls on the panel.
Described pressure examination jar 1, safety valve 2, the working platform 3 that the hydraulic pressure hold-down mechanism is housed, oil hydraulic cylinder 4, the hydraulic power unit 13 that has position control valve, big air inlet increment solenoid valve 15, little air inlet increment solenoid valve 14, pressure transducer 16, pressure-releasing electromagnetic valve 19, SCM system 20, check table suction port 18 are installed in the housing 17.
The described button 6, release button 7, liquid crystal screen 8, printer 9, keyboard 10 of compressing is installed on the panel 11.
The described depression bar body 24 that operating grip 25 is housed is contained in the piston rod topped hole of oil hydraulic cylinder 4.
Described counter flange 21, transit joint 22 are used for being installed of the tested pressure relief valve 5 of different size.
The pressure relief valve checking parameter that described SCM system 20 is provided with according to the user, control the break-make and the switching of big air inlet increment solenoid valve 15, little air inlet increment solenoid valve 14, the demand of various inlet increment when satisfying different bore pressure relief valve 5 verifications, and the pressure signal of real time record pressure transducer 16 collections, realize cracking pressure value, closing pressure value and experiments of sealing performance.
The use operation of the utility model pressure relief valve verification is as follows:
The first step: by being installed of verification pressure relief valve.
As Fig. 1, Fig. 4, shown in Figure 5, press the release button 7 on the panel 11, the depression bar body 24 on oil hydraulic cylinder 4 piston rod tops is up, with connecting mode is the tested pressure relief valve 5 of flange, directly or by counter flange 21 be placed on the working platform 3 that the hydraulic pressure hold-down mechanism is housed and centering by seal ring 23, push-and-pull operating grip 25 is adjusted the position of depression bar body 24, allows depression bar body 24 be pressed on the flange plate of tested pressure relief valve.By compressing button 6 on the panel 11, the hydraulic pressure hold-down mechanism compresses tested pressure relief valve 5 automatically.With pattern is installed is the tested pressure relief valve 5 of screw thread, be placed on the working platform 3 that the hydraulic pressure hold-down mechanism is housed and centering by transit joint 22, counter flange 21, transit joint 22 1 ends link to each other with pressure relief valve 5, the other end links to each other with counter flange 21, push-and-pull operating grip 25 is adjusted the position of depression bar body 24, allows depression bar body 24 be pressed on the counter flange 21.By compressing button 6 on the panel 11, the hydraulic pressure hold-down mechanism compresses counter flange 21 automatically.
Second step: the verification of tested pressure relief valve
Open the power supply and the valve of air compressor 12, the power supply of opening on the panel 11 is driven button, select " pressure relief valve verification " project and affirmation on the liquid crystal screen 8, the checking parameter of tested pressure relief valve 5 is set by the prompting on the liquid crystal screen, open little air inlet increment solenoid valve 14 or big air inlet increment solenoid valve 15 by SCM system 20, pressure examination jar 1 an interior air pressure is increased gradually, and SCM system 20 is gathered the instantaneous pressure signal in real time by pressure transducer 16, and is presented on the liquid crystal screen 8.When pressure examination jar 1 internal pressure was opened pressure relief valve 5, SCM system 20 was noted the force value of opening moment, and this value is the cracking pressure value of pressure relief valve 5.When pressure relief valve 5 is opened, little air inlet increment solenoid valve 14 or big air inlet increment solenoid valve 15 are closed in SCM system 20 controls, pressure examination jar 1 an internal pressure moment reduction is closed pressure relief valve 5 rapidly, SCM system 20 is noted the force value in the pressure examination this moment jar 1, and this value is the closing pressure value of pressure relief valve.
The 3rd step: pressure relief valve experiments of sealing performance
Claims (5)
1, a kind of pressure relief valve check table comprises pressure relief valve check test gas circuit, hydraulic pressure hold-down mechanism and single-chip computer control system, it is characterized in that:
A, pressure relief valve check test gas circuit comprise that pressure examination jar (1), pressure try on jar (1) pressure transducer (16), pressure-releasing electromagnetic valve (19), safety valve (2) to be installed, the suction port of pressure examination jar (1) is connected with big air inlet increment solenoid valve (15), little air inlet increment solenoid valve (14) respectively by tracheae, big air inlet increment solenoid valve (15), little air inlet increment solenoid valve (14) are connected with check table suction port (18), and check table suction port (18) is connected with air compressor (12) by tracheae; The air outlet of pressure examination jar (1) is bolted to connection with the working platform (3) that the hydraulic pressure hold-down mechanism is housed; The hydraulic pressure hold-down mechanism is installed on testing pressure relief valve (5) on the working platform (3) that the hydraulic pressure hold-down mechanism is housed by O type circle (23), counter flange (21), transit joint (22), power supply is connected with big air inlet increment solenoid valve (15), little air inlet increment solenoid valve (14), pressure-releasing electromagnetic valve (19) and air compressor (12) respectively;
B, hydraulic pressure hold-down mechanism comprise the hydraulic power unit (13) that has position control valve, hydraulic power unit (13) the one end hydraulic fluid ports that have position control valve are connected with an end hydraulic fluid port of oil hydraulic cylinder (4) by oil pipe, the other end hydraulic fluid port of oil hydraulic cylinder (4) links to each other by the other end hydraulic fluid port of oil pipe with the hydraulic power unit that has position control valve (13), depression bar body (24) is equipped with on the piston rod top of oil hydraulic cylinder (4), operating grip (25) is housed on the depression bar body (24), and power supply is connected with the hydraulic power unit that has position control valve (13);
C, single-chip computer control system comprise that SCM system (20), SCM system (20) are installed in the rear side of liquid crystal screen (8) panel of living in (11), and SCM system (20) links to each other with big air inlet increment solenoid valve (15), little air inlet increment solenoid valve (14), pressure transducer (16), pressure-releasing electromagnetic valve (19), printer (9), keyboard (10), liquid crystal screen (8) respectively; SCM system (20) is connected with power supply.
2, pressure relief valve check table according to claim 1 is characterized in that: described oil hydraulic cylinder (4) is at least three.
3, according to claim 1 and 2 described pressure relief valve check tables, it is characterized in that: described oil hydraulic cylinder (4) in parallel with have on the hydraulic power unit (13) of position control valve.
4, pressure relief valve check table according to claim 1 is characterized in that: described pressure examination jar (1), safety valve (2), the working platform (3) that the hydraulic pressure hold-down mechanism is housed, oil hydraulic cylinder (4), the hydraulic power unit (13) that has position control valve, big air inlet increment solenoid valve (15), little air inlet increment solenoid valve (14), pressure transducer (16), pressure-releasing electromagnetic valve (19), SCM system (20), check table suction port (18) are installed in the housing (17).
5, pressure relief valve check table according to claim 1 is characterized in that: the described button (6), release button (7), liquid crystal screen (8), printer (9), keyboard (10) of compressing is installed on the panel (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200909791U CN201190820Y (en) | 2007-07-09 | 2007-07-09 | Checkout platform for pressure release valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200909791U CN201190820Y (en) | 2007-07-09 | 2007-07-09 | Checkout platform for pressure release valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201190820Y true CN201190820Y (en) | 2009-02-04 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200909791U Expired - Lifetime CN201190820Y (en) | 2007-07-09 | 2007-07-09 | Checkout platform for pressure release valve |
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| CN (1) | CN201190820Y (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162897A (en) * | 2013-03-26 | 2013-06-19 | 国家电网公司 | Pressure relief valve checking device |
| CN103278312A (en) * | 2013-03-30 | 2013-09-04 | 国家电网公司 | Method and device for verifying pressure relief valve of transformer |
| CN103674436A (en) * | 2013-12-09 | 2014-03-26 | 江南大学 | Safety valve installation device of inspection bench |
| CN105067244A (en) * | 2015-08-11 | 2015-11-18 | 上海中船三井造船柴油机有限公司 | Scavenging collector pipe safety valve working pressure test device and method |
| CN105806606A (en) * | 2016-03-24 | 2016-07-27 | 国网辽宁省电力有限公司电力科学研究院 | Pressure relief valve calibration system |
| CN106053036A (en) * | 2016-05-19 | 2016-10-26 | 国网福建省电力有限公司 | Device and method for detecting main transformer relief valve on line |
| CN109084974A (en) * | 2018-09-19 | 2018-12-25 | 郑州赛奥电子股份有限公司 | Portable pressure relief valve calibration equipment |
| CN110296828A (en) * | 2019-07-25 | 2019-10-01 | 冉正华 | Portable combined pressure relief valve monitor station and detection method |
| CN110726547A (en) * | 2019-11-06 | 2020-01-24 | 国网宁夏电力有限公司检修公司 | Portable pressure protection device comprehensive calibration device |
| CN111256975A (en) * | 2020-03-10 | 2020-06-09 | 郑州赛奥电子股份有限公司 | Device and method for checking opening time of pressure release valve |
| CN112857790A (en) * | 2021-03-04 | 2021-05-28 | 郑州赛奥电子股份有限公司 | Pressure relief valve high-low temperature opening performance calibration device and calibration method |
| CN113125078A (en) * | 2021-04-23 | 2021-07-16 | 华能国际电力股份有限公司上海石洞口第一电厂 | Sealing test device for adjusting control valve of electromagnetic release valve of power station boiler |
| CN114397105A (en) * | 2021-12-10 | 2022-04-26 | 国网河北省电力有限公司电力科学研究院 | Pressure relief valve calibration device and calibration method for oil-immersed transformer |
-
2007
- 2007-07-09 CN CNU2007200909791U patent/CN201190820Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162897A (en) * | 2013-03-26 | 2013-06-19 | 国家电网公司 | Pressure relief valve checking device |
| CN103278312A (en) * | 2013-03-30 | 2013-09-04 | 国家电网公司 | Method and device for verifying pressure relief valve of transformer |
| WO2014161303A1 (en) * | 2013-03-30 | 2014-10-09 | 国家电网公司 | Check method and device for pressure release valve of transformer |
| CN103278312B (en) * | 2013-03-30 | 2015-07-01 | 国家电网公司 | Method and device for verifying pressure relief valve of transformer |
| CN103674436A (en) * | 2013-12-09 | 2014-03-26 | 江南大学 | Safety valve installation device of inspection bench |
| CN105067244A (en) * | 2015-08-11 | 2015-11-18 | 上海中船三井造船柴油机有限公司 | Scavenging collector pipe safety valve working pressure test device and method |
| CN105806606A (en) * | 2016-03-24 | 2016-07-27 | 国网辽宁省电力有限公司电力科学研究院 | Pressure relief valve calibration system |
| CN106053036A (en) * | 2016-05-19 | 2016-10-26 | 国网福建省电力有限公司 | Device and method for detecting main transformer relief valve on line |
| CN109084974A (en) * | 2018-09-19 | 2018-12-25 | 郑州赛奥电子股份有限公司 | Portable pressure relief valve calibration equipment |
| CN110296828A (en) * | 2019-07-25 | 2019-10-01 | 冉正华 | Portable combined pressure relief valve monitor station and detection method |
| CN110726547A (en) * | 2019-11-06 | 2020-01-24 | 国网宁夏电力有限公司检修公司 | Portable pressure protection device comprehensive calibration device |
| CN111256975A (en) * | 2020-03-10 | 2020-06-09 | 郑州赛奥电子股份有限公司 | Device and method for checking opening time of pressure release valve |
| CN112857790A (en) * | 2021-03-04 | 2021-05-28 | 郑州赛奥电子股份有限公司 | Pressure relief valve high-low temperature opening performance calibration device and calibration method |
| CN113125078A (en) * | 2021-04-23 | 2021-07-16 | 华能国际电力股份有限公司上海石洞口第一电厂 | Sealing test device for adjusting control valve of electromagnetic release valve of power station boiler |
| CN114397105A (en) * | 2021-12-10 | 2022-04-26 | 国网河北省电力有限公司电力科学研究院 | Pressure relief valve calibration device and calibration method for oil-immersed transformer |
| CN114397105B (en) * | 2021-12-10 | 2023-08-08 | 国网河北省电力有限公司电力科学研究院 | Pressure release valve calibration device and calibration method for oil immersed transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Hao Shangping Document name: Notification of patent rights granted to utility models and formalities for registration |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHENGZHOU SAIL ELECTRONIC CO., LTD. Free format text: FORMER NAME: SAI'AO ELECTRONICS CO., LTD., ZHENGZHOU |
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| CP03 | Change of name, title or address |
Address after: 450052 Henan city of Zhengzhou Province peach hi tech Industrial Development Zone, Road No. 1 Zhengzhou sai'ao electronic Limited by Share Ltd Patentee after: Zhengzhou Sail Electronic Co., Ltd. Address before: 450052 Henan city of Zhengzhou Province peach hi tech Industrial Development Zone, Road No. 1 Zhengzhou sai'ao Electronic Co. Ltd. Patentee before: Saiao Electronics Co., Ltd., Zhengzhou |
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| CX01 | Expiry of patent term |
Granted publication date: 20090204 |
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| CX01 | Expiry of patent term |