CN202255848U - High-pressure safety valve detection system - Google Patents
High-pressure safety valve detection system Download PDFInfo
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- CN202255848U CN202255848U CN2011202886061U CN201120288606U CN202255848U CN 202255848 U CN202255848 U CN 202255848U CN 2011202886061 U CN2011202886061 U CN 2011202886061U CN 201120288606 U CN201120288606 U CN 201120288606U CN 202255848 U CN202255848 U CN 202255848U
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- 238000001514 detection method Methods 0.000 title claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 7
- 238000010079 rubber tapping Methods 0.000 claims description 7
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 23
- 238000012360 testing method Methods 0.000 description 17
- 238000012795 verification Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
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- 241001269238 Data Species 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The utility model relates to a high pressure relief valve detecting system, including control system and water tank, control system connects pressure sensor, electronic air-vent valve, first solenoid valve and second solenoid valve respectively, pressure sensor is connected with the double needle manometer, first solenoid valve is parallelly connected and all is connected first air cleaner with the second solenoid valve, first drive air inlet and electronic air-vent valve are connected respectively to first air cleaner's both ends, first governing valve is connected to electronic air-vent valve's the other end, booster pump and second governing valve are connected to first governing valve, manual air-vent valve is connected to the second governing valve, the manometer is equipped with on the manual air-vent valve, second air cleaner is connected to manual air-vent valve, second drive air inlet is connected to second air cleaner. The utility model has the advantages that: high-precision calibration of the high-pressure safety valve is realized; the automation level is high, all operations of operators are only needed to be carried out on the measurement and control console after all operations are ready, the labor intensity is reduced, and the potential safety hazard is reduced.
Description
Technical field
The utility model relates to the pressure checking device field, relates in particular to a kind of high-pressure safety valve detection system.
Background technology
Safety valve is the important safety annex of pressure-bearing class special equipment, and verification is answered once for the verification regulation of safety every year at least by country.In recent years, along with the fast development of industry, ultra-high pressure safety valve is widely used in commercial production, and for guaranteeing the process units safe operation, the accident of preventing plays an important role.At present, domestic many ultra-high pressure safety valves can only be sent to and carry out verification abroad, and the time of abroad inspecting by ready samples, long expense was high, caused enterprise to undertake high inspection cost.The domestic safety valve testing system that produces is merely the low-pressure safety valve checking system, adopts electronic liquid pump that safety valve is carried out pressure test, setting and verification, and domestic electronic liquid pump low-pressure safety valve check system exists following problem and shortcoming at present:
1, for realizing each function of safety valve testing, the checkout equipment of the electronic liquid pump assembling of using carries out complicated connection with scattered equipment, but the final function that can control that realizes is comparatively single;
2, the electrodynamic pump pressure and the flow that can provide is all very limited, only can be used for the test of low-pressure safety valve, and can not be undertaken by desirable rate of pressurization;
3, do not have special-purpose detection software to support mutually, can't carry out parameter setting, more do not have the demonstration of real-time pressure curve, all operations is operation manually, and institute data show that being eye-observation draws, and so, remains to be examined for the accuracy of numerical value.Operation manually, just very difficult for the rate controlled of pump, labor capacity improves greatly.
4, electronic liquid pump itself is bulky and heavy, causes equipment occupation space bigger, moves inconvenience, and the noise of equipment brings certain influence for breadboard working environment.It is lubricated that electronic liquid pump needs oil, and the long-term use of pump can cause the generation of oil leakage phenomenon, pollutes for laboratory environment, and the maintaining of equipment all has certain difficulty.
The utility model content
The purpose of the utility model provides a kind of high-pressure safety valve detection system, to overcome the deficiency that the above-mentioned aspect of prior art exists.
The purpose of the utility model is to realize through following technical scheme:
A kind of high-pressure safety valve detection system comprises control system and water tank, and said control system connects pressure transducer, electric pressure-regulating valve, first solenoid valve and second solenoid valve respectively; Pressure transducer is connected with the crosspointer tensimeter, and first solenoid valve is with the parallel connection of second solenoid valve and all be connected first air strainer, and the two ends of first air strainer connect first drive air inlet and electric pressure-regulating valve respectively; The other end of electric pressure-regulating valve connects first flow speed control valve, and first flow speed control valve connects the supercharge pump and second flow speed control valve, and second flow speed control valve connects manual pressure regulating valve; Tensimeter is housed on the manual pressure regulating valve, and manual pressure regulating valve connects second air strainer, and second air strainer connects second drive air inlet; Supercharge pump connects Y type oil suction filtrator and retaining valve respectively, Y type oil suction filtrator be connected water tank and connect, water tank one side is provided with liquid level gauge; The water tank bottom is provided with tapping valve; Tapping valve connects the water tank leakage fluid dram, and retaining valve connects the gas control normally open valve, and the gas control normally open valve connects first solenoid valve and pressure retaining valve; Pressure retaining valve connects gas control normally close valve and blowdown valve; The gas control normally close valve all is connected the water tank leakage fluid dram with blowdown valve parallel connection and gas control normally close valve with blowdown valve, and second solenoid valve connects the gas control normally close valve, and pressure transducer connects pressure retaining valve, gas control normally close valve and blowdown valve respectively.
The beneficial effect of the utility model is: for guaranteeing the process units safe operation, the accident of preventing is being brought into play important effect; Top pressure can reach 200Mpa, can control in real time checking procedure, and can gather and write down checking data in real time, has realized the high-precision pre-check of high-pressure safety valve; Automatization level is high, and everything is ready, and back operating personnel's all operations only needs to carry out at monitoring and control unit, has reduced labour intensity, has reduced potential safety hazard; Can check fund in a large number for the saving of ultra-high pressure safety valve applying unit, shorten the stop production to overhaul time of enterprise,, have wide technology popularization prospect receiving good economic benefit and social benefit; Supercharge pump need not oil lubrication, and no noxious gas emission can not pollute environment, the maintenance simple and fast that gets up.
Description of drawings
According to accompanying drawing the utility model is done further explain below.
Fig. 1 is the process flow diagram of the described a kind of high-pressure safety valve detection system of the utility model embodiment.
Among the figure:
1, control system; 2, water tank; 3, supercharge pump; 4, first drive air inlet; 5, second drive air inlet; 6, pressure transducer; 7, electric pressure-regulating valve; 8, first solenoid valve; 9, second solenoid valve; 10, crosspointer tensimeter; 11, first air strainer; 12, first flow speed control valve; 13, second flow speed control valve; 14, manual pressure regulating valve; 15, second air strainer; 16, tensimeter; 17, Y type oil suction filtrator; 18, retaining valve; 19, liquid level gauge; 20, tapping valve; 21, water tank leakage fluid dram; 22, gas control normally open valve; 23, pressure retaining valve; 24, gas control normally close valve; 25, blowdown valve.
Embodiment
As shown in Figure 1, the described a kind of high-pressure safety valve detection system of the utility model embodiment comprises control system 1 and water tank 2; Said control system 1 connects pressure transducer 6, electric pressure-regulating valve 7, first solenoid valve 8 and second solenoid valve 9 respectively, and pressure transducer 6 is connected with crosspointer tensimeter 10, the first solenoid valves 8 with the parallel connection of second solenoid valve 9 and all be connected first air strainer 11; The two ends of first air strainer 11 connect first drive air inlet 4 and electric pressure-regulating valve 7 respectively, and the other end of electric pressure-regulating valve 7 connects first flow speed control valve, 12, the first flow speed control valves 12 and connects the supercharge pump 3 and second flow speed control valve 13; Second flow speed control valve 13 connects manual pressure regulating valve 14, and tensimeter 16 is housed on the manual pressure regulating valve 14, and manual pressure regulating valve 14 connects second air strainer 15; Second air strainer 15 connects second drive air inlet 5; Supercharge pump 3 connects Y type oil suction filtrator 17 and retaining valve 18 respectively, Y type oil suction filtrator 17 be connected water tank 2 connections, water tank 2 one sides are provided with liquid level gauge 19; Water tank 2 bottoms are provided with tapping valve 20; Tapping valve 20 connects water tank leakage fluid dram 21, and retaining valve 18 connects gas control normally open valve 22, and gas control normally open valve 22 connects first solenoid valve 8 and pressure retaining valve 23; Pressure retaining valve 23 connects gas control normally close valve 24 and blowdown valve 25; Gas control normally close valve 24 all is connected water tank leakage fluid dram 21, the second solenoid valves 9 with blowdown valve 25 parallel connections and gas control normally close valve 24 with blowdown valve 25 and connects gas control normally close valve 24, and pressure transducer 6 connects pressure retaining valve 23, gas control normally close valve 24 and blowdown valve 25 respectively.
During concrete the use, first drive air inlet 4 is electronic control, is furnished with electric pressure-regulating valve 7; Can be through the rate of pressurization of control system 1 startup-shutdown with control supercharge pump 3; Gas filters through first air filter 11, through the electric pressure-regulating valve 7 and first flow speed control valve 12, inserts manual pressure regulating valve 14 in first air strainer, 11 downstream; Pressurized air is received the control electromagnetic valve of pressure retaining valve 23 and blowdown valve 25 after manually pressure regulator valve 14 reduces pressure, as valve driving gas; Second drive air inlet 5 is manually control; Is furnished with manual pressure regulating valve 7; Need manually to set drive air pressure, thus the start-stop and the rate of pressurization of control supercharge pump 3, and gas filters through second air strainer 15 laggardly goes into manual pressure regulator valve 7 and through second flow speed control valve 13; No matter electronic or manual gas finally gets into the actuator chamber of supercharge pump 3, thus the start-stop action and the rate of pressurization of control supercharge pump 3; Open the stop valve of water outlet of water tank after water tank 2 water fillings; Supercharge pump 3 begins action under the effect that drives gas; Water carries out supercharging via the inlet of 17 pairs of supercharge pumps 3 of y-type filter, and the high-pressure medium after the supercharging needs the safety valve of test through entering behind the system outlet through retaining valve 18, gas control normally open valve 22; The pressure transducer 6 in control system 1 exit feeds back to the PLC controller in the control system 1 in real time for the force value of system outlet, and after signal was handled through control system 1, control system 1 can be controlled for system by pre-set parameter.
Supercharging partly is the core of whole safety valve detection system; Form by supercharge pump 3 and retaining valve 18, flow speed control valve, Pneumatic valve, solenoid valve, electric pressure-regulating valve 7, pressure transducer 6 and various stainless steel pipe joint and tensimeter 16 etc.; The supercharging part can be carried out manual operation; Also can under the control of TT&C system, operate automatically, press the button system and can start supercharge pump 3 automatically, electric pressure-regulating valve 7 is regulated drive air pressure automatically under the control of electric signal; Thereby control supercharge pump 3 rate of circulation and delivery rate; The pressure transducer 6 of system outlet is transferred to the PLC controller in the control system 1 with output pressure, when output pressure reaches the pressure parameter value of safety valve test, and system's auto stop.
Be provided with software systems in the control system 1, can realize suppressing automatically, data storage, in real time show control picture and pressure curve, can set in real time.This detection system adopts pneumatic liquid pump supercharging, has utilized its output pressure and drive air pressure this characteristics that are directly proportional dexterously, has guaranteed the adjustable controlled performance of output pressure flow, satisfies the testing requirements of this type safety-valve; Powerful, comprehensive, system mainly comprise following function: 1. be fit to the test of the safety valve of multiple pressure rating, particularly can test the high-pressure safety valve testing requirements, pressure is optional, controlled, and flow is adjustable; 2. the parameter of test is comprehensive, comprises that test pressure, rated pressure are regulated, safety valve is opened, the mensuration of closing presure, and the verification of safety valve pressure etc.; 3. software interface is clear, various pressure when monitored picture can comprehensively show safety valve testing, and various test datas can be unified in the data query table and find, and are simple and quick; Can show different curves, comprise the pressure-time curve that shows real-time pressure-time curve, shows history, picture is directly perceived visual strong; 4. manually with optional automatically, dirigibility is strong; 5. special-purpose Control Software is friendly flexibly, comprises multiple interface, like data demonstration, state of a control interface, can freely switch; 6. all image data can store the specific data file into, conveniently call, and each test can generate word version test report automatically, can directly print, and signs and seal and comes into force.
Native system is provided with the system operation platform, this operator's console comprise control desk power switch, emergency stop push button, automatic/hand mode conversion switch, automatically control knob (start and stop), suppress the parts such as corresponding pilot lamp of control knob, holding pressure control button, pressure discharge control button, system pressure read out instrument and above-mentioned control knob once more.Wherein: the control desk power switch: be blasting system policer operation platform and inner electric power supply thereof; Emergency stop push button: be used for system stopping rapidly total system when unusual and emergency occurring; Automatic/hand switch: be used for the automatic or manual operation of selective system; Automatic control knob: be used to control the startup of system under the automatic operational mode and stop; Holding pressure control button: be used for the pressurize of manual control system and stop pressurize; Pressure discharge control button: be used for the pressure release of manual control system and stop pressure release; The system alarm pilot lamp: the system alarm pilot lamp is bright when system overpressure or during sensor fault; Automatic run indicator: bright when selecting automatic operational mode and pressing automatic control start button rear indicator light; System pressure digital indicator: the force value that is used for dynamic display system.
This detection system comprises manual mode and automation mechanized operation pattern:
Manual mode: the driving gas manual modulation valve 14 that slow to the right rotating panel is installed, supercharge pump 3 will produce the high-pressure of a correspondence in the high-pressure output tube road, manually rotate the speed of manual modulation valve 14 and the pace of change positive correlation of high-pressure side output pressure; The output pressure that can read pressure piping this moment through the tensimeter 16 that panel is installed continues to right rotation manual modulation valve 14 knobs, up to safety valve jumping up; Close manual pressure retaining valve 23 this moment rapidly, and reverse rotation manual modulation valve 14, and driver pressure is adjusted to 0; When safety valve stops to release by the time, accurately read the take-off value of safety valve, and write down manometric pressure this moment through the top pressure memory function of tensimeter 16; This pressure is the recovery pressure of safety valve; Open manual blowdown valve 25 after having write down, discharge conduit pressure repeats 3 times and measures; Get its mean value, can obtain the take-off value and the recovery pressure value of this safety valve.
Automation mechanized operation: open computer, get into main interface, the upper pressure limit (system will guarantee that the high pressure output pressure can not surpass this value) of this test is set; Volume according to this tested safety valve is provided with suitable pumping rate ((6～80) MPa/Min), clicks start button, system's high pressure output pressure that will progressively raise; When safety valve generation take-off, system will stop supercharging and close pneumatic pressure retaining valve 23, to be checked measuring after safety valve replys sealing; System is with in the report that generates, adding pressure curve; Automatically write down this safety valve jumping up value and recovery value, and, repeat 3 times and measure through pneumatic blowdown valve 23 discharge conduit pressure; Get its mean value, can obtain the take-off value and the recovery pressure value of this safety valve.
The utility model is not limited to above-mentioned preferred forms; Anyone can draw other various forms of products under the enlightenment of the utility model; No matter but on its shape or structure, do any variation; Every have identical with a application or akin technical scheme, all drops within the protection domain of the utility model.
Claims (1)
1. high-pressure safety valve detection system; Comprise control system (1) and water tank (2); It is characterized in that: said control system (1) connects pressure transducer (6), electric pressure-regulating valve (7), first solenoid valve (8) and second solenoid valve (9) respectively, and pressure transducer (6) is connected with crosspointer tensimeter (10), and first solenoid valve (8) is with second solenoid valve (9) parallel connection and all be connected first air strainer (11); The two ends of first air strainer (11) connect first drive air inlet (4) and electric pressure-regulating valve (7) respectively; The other end of electric pressure-regulating valve (7) connects first flow speed control valve (12), and first flow speed control valve (12) connects supercharge pump (3) and second flow speed control valve (13), and second flow speed control valve (13) connects manual pressure regulating valve (14); Tensimeter (16) is housed on the manual pressure regulating valve (14); Manual pressure regulating valve (14) connects second air strainer (15), and second air strainer (15) connects second drive air inlet (5), and supercharge pump (3) connects Y type oil suction filtrator (17) and retaining valve (18) respectively; Y type oil suction filtrator (17) be connected water tank (2) and connect; Water tank (2) one sides are provided with liquid level gauge (19), and water tank (2) bottom is provided with tapping valve (20), and tapping valve (20) connects water tank leakage fluid dram (21); Retaining valve (18) connects gas control normally open valve (22); Gas control normally open valve (22) connects first solenoid valve (8) and pressure retaining valve (23), and pressure retaining valve (23) connects gas control normally close valve (24) and blowdown valve (25), and gas control normally close valve (24) all is connected water tank leakage fluid dram (21) with blowdown valve (25) parallel connection and gas control normally close valve (24) with blowdown valve (25); Second solenoid valve (9) connects gas control normally close valve (24), and pressure transducer (6) connects pressure retaining valve (23), gas control normally close valve (24) and blowdown valve (25) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202886061U CN202255848U (en) | 2011-08-10 | 2011-08-10 | High-pressure safety valve detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202886061U CN202255848U (en) | 2011-08-10 | 2011-08-10 | High-pressure safety valve detection system |
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| CN202255848U true CN202255848U (en) | 2012-05-30 |
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| CN2011202886061U Expired - Lifetime CN202255848U (en) | 2011-08-10 | 2011-08-10 | High-pressure safety valve detection system |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323158A (en) * | 2011-08-10 | 2012-01-18 | 巩宁峰 | High pressure safety valve detection system |
| USD707332S1 (en) | 2013-03-15 | 2014-06-17 | S.P.M. Flow Control, Inc. | Seal assembly |
| USD707797S1 (en) | 2013-03-15 | 2014-06-24 | S.P.M. Flow Control, Inc. | Seal segment |
| US8870233B2 (en) | 2007-07-03 | 2014-10-28 | S.P.M. Flow Control, Inc. | Swivel joint with uniform ball bearing requirements |
| US8978695B2 (en) | 2009-04-20 | 2015-03-17 | S.P.M. Flow Control, Inc. | Flowline flapper valve |
| US8998168B2 (en) | 2009-06-03 | 2015-04-07 | S.P.M. Flow Control, Inc. | Plug valve indicator |
| CN104502075A (en) * | 2014-12-03 | 2015-04-08 | 余姚市三力信电磁阀有限公司 | Steam electromagnetic valve safety detection system and safety detection method thereof |
| US9103448B2 (en) | 2012-08-16 | 2015-08-11 | S.P.M. Flow Control, Inc. | Plug valve having preloaded seal segments |
| US9273543B2 (en) | 2012-08-17 | 2016-03-01 | S.P.M. Flow Control, Inc. | Automated relief valve control system and method |
| US9322243B2 (en) | 2012-08-17 | 2016-04-26 | S.P.M. Flow Control, Inc. | Automated relief valve control system and method |
| CN105715854A (en) * | 2014-12-03 | 2016-06-29 | 中国石油天然气股份有限公司 | energy storage device |
| CN105806603A (en) * | 2016-03-16 | 2016-07-27 | 北京宇航系统工程研究所 | Pilot safety valve testing system and method |
| CN106234911A (en) * | 2016-07-29 | 2016-12-21 | 北京速原中天科技股份公司 | A kind of pressure relief device for supertension sterilize device |
| US9568138B2 (en) | 2013-07-01 | 2017-02-14 | S.P.M. Flow Control, Inc. | Manifold assembly |
| CN109060230A (en) * | 2018-07-27 | 2018-12-21 | 宁波市产品质量监督检验研究院 | Safety valve for pressure cooker detection system |
| CN109238686A (en) * | 2017-07-06 | 2019-01-18 | 北京康斯特仪表科技股份有限公司 | Detector for safety valve and safety valve detection method |
| CN110721918A (en) * | 2019-10-10 | 2020-01-24 | 格力电器（武汉）有限公司 | Safety valve loading and unloading equipment and safety valve testing machine |
| US10557576B2 (en) | 2015-06-15 | 2020-02-11 | S.P.M. Flow Control, Inc. | Full-root-radius-threaded wing nut having increased wall thickness |
| US10677365B2 (en) | 2015-09-04 | 2020-06-09 | S.P.M. Flow Control, Inc. | Pressure relief valve assembly and methods |
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2011
- 2011-08-10 CN CN2011202886061U patent/CN202255848U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9964245B2 (en) | 2007-07-03 | 2018-05-08 | S.P.M. Flow Control, Inc. | Swivel joint with uniform ball bearing requirements |
| US8870233B2 (en) | 2007-07-03 | 2014-10-28 | S.P.M. Flow Control, Inc. | Swivel joint with uniform ball bearing requirements |
| US8978695B2 (en) | 2009-04-20 | 2015-03-17 | S.P.M. Flow Control, Inc. | Flowline flapper valve |
| US8998168B2 (en) | 2009-06-03 | 2015-04-07 | S.P.M. Flow Control, Inc. | Plug valve indicator |
| CN102323158B (en) * | 2011-08-10 | 2014-06-11 | 巩宁峰 | High pressure safety valve detection system |
| CN102323158A (en) * | 2011-08-10 | 2012-01-18 | 巩宁峰 | High pressure safety valve detection system |
| US9103448B2 (en) | 2012-08-16 | 2015-08-11 | S.P.M. Flow Control, Inc. | Plug valve having preloaded seal segments |
| US9638337B2 (en) | 2012-08-16 | 2017-05-02 | S.P.M. Flow Control, Inc. | Plug valve having preloaded seal segments |
| US9857807B2 (en) | 2012-08-17 | 2018-01-02 | S.P.M. Flow Control, Inc. | Automated relief valve control system and method |
| US9273543B2 (en) | 2012-08-17 | 2016-03-01 | S.P.M. Flow Control, Inc. | Automated relief valve control system and method |
| US9322243B2 (en) | 2012-08-17 | 2016-04-26 | S.P.M. Flow Control, Inc. | Automated relief valve control system and method |
| USD707332S1 (en) | 2013-03-15 | 2014-06-17 | S.P.M. Flow Control, Inc. | Seal assembly |
| USD734434S1 (en) | 2013-03-15 | 2015-07-14 | S.P.M. Flow Control, Inc. | Seal assembly |
| USD707797S1 (en) | 2013-03-15 | 2014-06-24 | S.P.M. Flow Control, Inc. | Seal segment |
| USD873860S1 (en) | 2013-07-01 | 2020-01-28 | S.P.M. Flow Control, Inc. | Mounting bracket for manifold assembly |
| US10738928B2 (en) | 2013-07-01 | 2020-08-11 | S.P.M. Flow Control, Inc. | Manifold assembly |
| US9568138B2 (en) | 2013-07-01 | 2017-02-14 | S.P.M. Flow Control, Inc. | Manifold assembly |
| CN105715854A (en) * | 2014-12-03 | 2016-06-29 | 中国石油天然气股份有限公司 | energy storage device |
| CN104502075B (en) * | 2014-12-03 | 2017-08-25 | 余姚市三力信电磁阀有限公司 | The method of the detection steam electromagnetic valve of safety |
| CN104502075A (en) * | 2014-12-03 | 2015-04-08 | 余姚市三力信电磁阀有限公司 | Steam electromagnetic valve safety detection system and safety detection method thereof |
| US10557576B2 (en) | 2015-06-15 | 2020-02-11 | S.P.M. Flow Control, Inc. | Full-root-radius-threaded wing nut having increased wall thickness |
| US11519530B2 (en) | 2015-06-15 | 2022-12-06 | Spm Oil & Gas Inc. | Full-root-radius-threaded wing nut having increased wall thickness |
| US10677365B2 (en) | 2015-09-04 | 2020-06-09 | S.P.M. Flow Control, Inc. | Pressure relief valve assembly and methods |
| CN105806603A (en) * | 2016-03-16 | 2016-07-27 | 北京宇航系统工程研究所 | Pilot safety valve testing system and method |
| CN106234911A (en) * | 2016-07-29 | 2016-12-21 | 北京速原中天科技股份公司 | A kind of pressure relief device for supertension sterilize device |
| CN109238686A (en) * | 2017-07-06 | 2019-01-18 | 北京康斯特仪表科技股份有限公司 | Detector for safety valve and safety valve detection method |
| CN109060230B (en) * | 2018-07-27 | 2020-04-10 | 宁波市产品质量监督检验研究院 | Safety valve detection system for pressure cooker |
| CN109060230A (en) * | 2018-07-27 | 2018-12-21 | 宁波市产品质量监督检验研究院 | Safety valve for pressure cooker detection system |
| CN110721918A (en) * | 2019-10-10 | 2020-01-24 | 格力电器（武汉）有限公司 | Safety valve loading and unloading equipment and safety valve testing machine |
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