CN205719497U - A kind of relief valve performance test and on-line testing instrument calibration equipment - Google Patents
A kind of relief valve performance test and on-line testing instrument calibration equipment Download PDFInfo
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- CN205719497U CN205719497U CN201620280323.5U CN201620280323U CN205719497U CN 205719497 U CN205719497 U CN 205719497U CN 201620280323 U CN201620280323 U CN 201620280323U CN 205719497 U CN205719497 U CN 205719497U
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Abstract
The utility model discloses a kind of relief valve performance test and on-line testing instrument calibration equipment.Outlet one tunnel of high-pressure air source is connected with surge tank entrance through stop valve, air relief valve, Pressure gauge, electromagnetic valve and flow transducer；Another road is connected with storage tank through ball valve, and storage tank is further connected with relief valve and Pressure gauge；Being connected to temperature sensor on surge tank, its upper outlet connects with relief valve grain-clamping table, and its lower outlet is connected with atmospheric valve；Surge tank upper outlet is connected with the entrance of experimental safe valve, and the first pressure transducer is connected on the porch of experimental safe valve；Outlet connects through the floss hole of second flow sensor, the second pressure transducer and experimental safe valve；Relief valve on-line testing instrument is arranged on experimental safe valve；Two pressure transducers, temperature sensors are connected with adjustment controlling test screen with two flow transducers.It can quickly test relief valve performance；The accuracy of verification relief valve on-line testing instrument；The relief valve performance test of hot environment, back pressure environment can be simulated.
Description
Technical field
This utility model relates to relief valve performance test and calibration equipment, particularly relates to a kind of relief valve performance test and on-line testing instrument calibration equipment.
Background technology
Relief valve is the most widely used a kind of safety attachment in the pressure-bearing kind equipments such as boiler, pressure vessel, pressure pipeline, in order to prevent pressure from exceeding the ultimate value of permission, it is ensured that the safe and reliable operation of system.Therefore, relief valve, as the final decompression protection device of production system, is commonly referred to as the last line of defense of production system safety.In bearing device production process, each pressure system, pressure source outlet are typically fitted with relief valve and system are carried out overpressure protection, especially being most widely used with spring Fall lift safety valve.And domestic relevant laws and regulations and standard all do not provide clear and definite discharge coefficient, as GB 150-2011 " pressure vessel " and GB/T 12241-2005 " requiring relief valve " specifies, when discharge medium is gas, take derated coefficient of discharge and carry out the calculating of Methods of Safety Valve Discharge Capacity, and derated coefficient of discharge is provided by relief valve maker or recorded by test.When relief valve dispatches from the factory, manufacturer all can be marked in derated coefficient of discharge on nameplate, discharge coefficient may be considered as when this has resulted in calculating Methods of Safety Valve Discharge Capacity unique definite value, actually Safety Valve Relieve Coefficient is not only relevant with the physical dimension of valve, the difference of discharge operating mode (as there is certain back pressure in discharge pipe) and medium physical parameter will also result in the difference of emission factor, so the derated coefficient of discharge demarcated on nameplate is the most incomplete, it is not necessary to be applicable to the discharge operating mode of reality.Additionally, the compressible gas that relevant laws and regulations and standard specify both at home and abroad discharge capacity formula under subcritical discharge is only applicable to discharge capacity account known to relief valve back pressure, and the relief valve in actual production process often connects and has discharge tube, owing to superimposed back pressure that pipeline crushing bring cannot be determined in advance, thus the relief valve back pressure that can not get reality carries out discharge capacity account accurately, cause relief valve type selecting to be forbidden, need the test device simulating actual condition to carry out relief valve performance test.
The unlatching of spring safety valve, closing motion be dependent on its entrance point pressure medium change and initial tension of spring to make spool automatically turn on and to close.When pressure medium (intrinsic pressure) be increased to lifting force bigger than initial tension of spring time, spool overcomes initial tension of spring to automatically turn on, unnecessary medium of releasing, make interior drops, again due to the effect of spring force, when intrinsic pressure be down to safety value time, spool is automatically switched off, stopping of releasing.Around this principle, when measuring (also known as hot) or adjust relief valve online, if being provided an additional force upwards by outside, then when the summation of pressure medium Yu this additional force just overcomes initial tension of spring, spool the most also can be opened, even under the conditions of there is no the off-line (also known as cold conditions) of medium effect, when individually being overcome initial tension of spring by external add-in power, spool also can be opened, judging and opening method has base sonde method at present, audio frequency method, displacement method, additional external force knee of curve, the relief valve on-line testing technology that additional external force knee of curve is the most ripe sentences out criterion.The safety valve testing precision key factor of relief valve on-line testing instrument is to sentence out criterion accuracy, especially knee of curve method of identification needs precisely to catch the flex point that relief valve is opened, the parameter such as relief valve inlet pressure and flow cannot be verified by Accurate Determining during on-line testing, need the calibration equipment of a set of more precision analog actual condition to verify the accuracy of safe on-line testing instrument.
Utility model content
Open and discharge performance, the accuracy of verification relief valve on-line testing instrument to accurately measure existing spring loaded safety valve, the purpose of this utility model is to provide a kind of relief valve performance test and on-line testing instrument calibration equipment, and its structure is relatively easy, manufacturing cost is relatively low, can quickly detect the performance of relief valve and the device of verification on-line testing instrument accuracy.
The technical solution adopted in the utility model is:
This utility model includes multiple gas cylinder, bus-bar, stop valve, air relief valve, Pressure gauge, flow transducer, first flow sensor, relief valve grain-clamping table, the first pressure transducer, adjustment controlling test screen, temperature sensor, surge tank, experimental safe valve, the second pressure transducer, second flow sensor, storage tank, ball valve, relief valve, Pressure gauge, atmospheric valve and relief valve on-line testing instrument；
Multiple gas cylinders and bus-bar also connect composition high-pressure air source, and the outlet of high-pressure air source is divided into two-way, and a road is connected with the entrance of surge tank through stop valve, air relief valve, Pressure gauge, electromagnetic valve and flow transducer successively；Another road is connected with storage tank upper port through ball valve, and storage tank is further connected with relief valve and Pressure gauge；Being connected to temperature sensor on surge tank, surge tank upper outlet connects with relief valve grain-clamping table, and under surge tank, outlet is connected with atmospheric valve；Surge tank upper outlet is connected with the entrance of experimental safe valve, and the first pressure transducer is connected on the porch of experimental safe valve；Outlet connects through the floss hole of second flow sensor, the second pressure transducer and experimental safe valve；Relief valve on-line testing instrument is arranged on experimental safe valve；First pressure transducer, temperature sensor, first flow sensor, second flow sensor and the second pressure transducer are connected with adjustment controlling test screen.
Described experimental safe valve grain-clamping table, the hydraulic pressure scroll chuck using inside nominal diameter to be DN10～400mm, clamping inside nominal diameter is DN10～400mm relief valve.
The plurality of gas cylinder is 2～10, is each attempted by bus-bar.
This utility model has the beneficial effect that
1) spring safety valve performance be can quickly test and discharge capacity, set-pressure, blow pressure included；
2) accuracy of relief valve on-line testing instrument is verified；
3) the relief valve performance test of hot environment, back pressure environment, safe on-line testing instrument precision checking can be simulated.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present utility model.
Fig. 2 is experimental safe valve and relief valve on-line testing instrument installation diagram.
In figure: 1, multiple gas cylinders, 2, bus-bar, 3, stop valve, 4, air relief valve, 5, Pressure gauge, 6, electromagnetic valve, 7, first flow sensor, 8, relief valve grain-clamping table, 9, the first pressure transducer, 10, adjustment controlling test screen, 11, temperature sensor, 12, surge tank, 13, experimental safe valve, the 14, second pressure transducer, 15, second flow sensor, 16, storage tank, 17, ball valve, 18, relief valve, 19, Pressure gauge, 20, atmospheric valve, 21, relief valve on-line testing instrument.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1 and Figure 2, this utility model includes multiple gas cylinder 1, bus-bar 2, stop valve 3, air relief valve 4, Pressure gauge 5, flow transducer 6, first flow sensor 7, relief valve grain-clamping table the 8, first pressure transducer 9, adjustment controlling test screen 10, temperature sensor 11, surge tank 12, experimental safe valve the 13, second pressure transducer 14, second flow sensor 15, storage tank 16, ball valve 17, relief valve 18, Pressure gauge 19, atmospheric valve 20 and relief valve on-line testing instrument 21.
Multiple gas cylinders 1 and bus-bar 2 also connect composition high-pressure air source, and the outlet of high-pressure air source is divided into two-way, and a road is connected with the entrance of surge tank 12 through stop valve 3, air relief valve 4, Pressure gauge 5, electromagnetic valve 6 and flow transducer 7 successively；Another road is connected with storage tank 16 upper port through ball valve 17, and storage tank 16 is further connected with relief valve 18 and Pressure gauge 19；Being connected to temperature sensor 11 on surge tank 12, surge tank 12 upper outlet connects with relief valve grain-clamping table 8, and 12 times outlets of surge tank are connected with atmospheric valve 20；Surge tank 12 upper outlet is connected with the entrance of experimental safe valve 13, and the first pressure transducer 9 is connected on the porch of experimental safe valve 13；The floss hole that storage tank 16 exports through second flow sensor the 15, second pressure transducer 14 and experimental safe valve 13 connects；Relief valve on-line testing instrument 21 is arranged on experimental safe valve 13；First pressure transducer 9, temperature sensor 11, first flow sensor 7, second flow sensor 15 are connected with adjustment controlling test screen 10 with the second pressure transducer 14.
Described experimental safe valve grain-clamping table 8, the hydraulic pressure scroll chuck using inside nominal diameter to be DN10～400mm, clamping inside nominal diameter is DN10～400mm relief valve.
The plurality of gas cylinder 1 is 2～10, is each attempted by bus-bar 2.
Adjustment controlling test screen 10 and relief valve on-line testing instrument 21 are standard component, can commercially choose.
Operation principle of the present utility model is:
1) unlatching of experimental safe valve 13, closing motion are dependent on the high-pressure air source 1 of its entrance point by being decompressed to surge tank 12, pressure medium change or apply external force and offset experimental safe valve 13 initial tension of spring and make spool open and close in surge tank 12.When surge tank 12 pressure (intrinsic pressure) be increased to lifting force bigger than initial tension of spring time (experimental safe valve 13 can be promoted to by the lifting device reinforcing of relief valve on-line testing instrument 21 during simulating Safety valve on-line testing discharge), spool overcomes initial tension of spring to open, release unnecessary medium, experimental safe valve 13 inlet pressure continues to raise, experimental safe valve 13 is opened into maximum height, reach specified discharge capacity, after the medium of high pressure is released, make interior drops (lifting force can be discharged by 13 times seats of experimental safe valve by relief valve on-line testing instrument 21 during simulating Safety valve on-line testing), again due to the effect of spring force, when intrinsic pressure be down to safety value time, spool is closed, release stopping.
2) for there is the experimental safe valve 13 of back pressure, outlet at experimental safe valve 13 connects the storage tank 16 of certain pressure (depending on experimental safe valve applying working condition), and the big I of back pressure regulates the pressure of storage tank 16 by high-pressure air source (gas cylinder 1 and bus-bar 2 vent ball valve 17).
3) at experimental safe valve 13 from being opened into closing process, adjustment controlling test screen 10 by gathering test the first pressure transducer 9 of pipeline, temperature sensor 11, first flow sensor 7, the second flow sensor 15 of back pressure unit and the second pressure transducer 14 data, draw the pressure history of whole experimental safe valve 13 process of the test, flow changing curve figure thus reach the test of experimental safe valve 13 and relief valve on-line testing instrument 21.
Relief valve performance test:
1) experimental safe valve 13 is fixed on safety valve hydraulic grain-clamping table 8；
2) first pressure transducer the 9, second pressure transducer 14, first flow sensor 7, second flow sensor 15 and the temperature sensor 11 being suitable for range is selected to be installed on pipeline；
3) opening adjustment controlling test screen 10 power supply, first pressure transducer the 9, second pressure transducer 14, first flow sensor 7, second flow sensor 15 and temperature sensor 11 are in state to be collected；
4) high-pressure air source of gas cylinder 1 is opened to storage tank 16 (volume 5m3) ball valve 17, when storage tank 16 reach set pressure, close ball valve 17 (when need to have back pressure test)；
5) opening the high-pressure air source of gas cylinder 1, open stop valve 3, gases at high pressure connect Pressure gauge 5 through air relief valve 4, and electromagnetic valve 6 is opened, and make surge tank 12 (volume 1m3) it being forced into that experimental safe valve 13 is micro-to be opened, the first pressure transducer 9 gathers internal pressure P opening momentz, this pressure is the set-pressure of experimental safe valve 13；
6) rising test loine pressure is to experimental safe valve 13 full open, discharges about 5 second time, now data P of the first pressure transducer 9 that adjustment controlling test screen 10 gathers0, data p of the second pressure transducer 141, data T of temperature sensor 110, the flow area A of input relief valve 13, specified that by formula GB150-2011 the theoretical displacement of compressible gas is calculated as follows:
In formula: W Methods of Safety Valve Discharge Capacity value, kg/s；
A relief valve or the minimum discharge area of rupture disk, mm2；
K discharge coefficient；
P1Relief valve back pressure (absolute pressure)；kPa；
P0The discharge pressure (absolute pressure) of relief valve, including set-pressure and excessive pressure limit two parts, kPa；
The molal weight of M gas, kg/kmol；
The coefficient of compressibility of Z gas, for air Z=1.0；
K is the adiabatic exponent under import situation (for ideal gas, k is equal to specific heat ratio) when discharge
T0The temperature of gas, K.
The displacement value of experimental safe valve 13 is calculated by formula (2)；
7) closing electromagnetic valve 6 and reduce test loine pressure, make experimental safe valve 13 valve return seat, adjustment controlling test screen 10 gathers, by the first pressure transducer 9, the blow pressure P that pressure is relief valve 13H；
8) stop high-pressure air source supply, open atmospheric valve 20 and release loine pressure, remove experimental safe valve 13.
Relief valve on-line testing instrument verifies:
1) the experimental safe valve 13 through above-mentioned Experimental Calibration is fixed on safety valve hydraulic grain-clamping table 8；
2) safe on-line testing instrument 21 framework is fixed on experimental safe valve 13, selects the suitable range of pressure transducer that relief valve on-line testing instrument 21 is built-in；
3) first pressure transducer the 9, second pressure transducer 14, first flow sensor 7, second flow sensor 15 and the temperature sensor 11 being suitable for range is selected to be installed on pipeline；
4) opening adjustment controlling test screen 10 power supply, first pressure transducer the 9, second pressure transducer 14, first flow sensor 7, second flow sensor 15 and temperature sensor 11 are in state to be collected；
5) high-pressure air source of gas cylinder 1 is opened to storage tank 16 (volume 5m3) ball valve 17, when storage tank 16 reach set pressure, close ball valve 17 (when need to have back pressure test)；
6) opening the high-pressure air source of gas cylinder 1, open stop valve 3, gases at high pressure connect Pressure gauge 5 through air relief valve 4, and electromagnetic valve 6 is opened, and raise surge tank 12 pressure and open the 70% of pressure to experimental safe valve 13；
7) opening the lifting device of relief valve on-line testing instrument 21, reinforcing to experimental safe valve 13 is opened.
Opening moment at experimental safe valve 13, relief valve on-line testing instrument 21 gathers data F of external add-in powerW, adjustment controlling test screen 10 gathers data P by the first pressure transducer 9L, the second pressure transducer 14 gather data P1, data A of the flow area of input relief valve 13, formula (2), (3) calculate the set-pressure of experimental safe valve 13.The condition that spool is opened is:
FT=FW+PL×A
Wherein: FTInitial tension of spring；FWExternal add-in power；
PLMedium actuating pressure；A flow area.
Then set-pressure P is: P=PL+FW/A (2)
When system exists back pressure, then set-pressure P is: P=PL+FW/A-P1
When cold conditions, FT=FW, it may be assumed that P=FW/A (3)
8) stop high-pressure air source supply, open atmospheric valve 20 and release loine pressure, remove relief valve on-line testing instrument 21 and experimental safe valve 13.
Above-mentioned detailed description of the invention is used for illustrating this utility model; rather than this utility model is limited; in spirit of the present utility model and scope of the claims, any modifications and changes that this utility model is made, both fall within protection domain of the present utility model.
Claims (3)
1. a relief valve performance test and on-line testing instrument calibration equipment, it is characterized in that: include multiple gas cylinder (1), bus-bar (2), stop valve (3), air relief valve (4), Pressure gauge (5), flow transducer (6), first flow sensor (7), relief valve grain-clamping table (8), first pressure transducer (9), adjustment controlling test screen (10), temperature sensor (11), surge tank (12), experimental safe valve (13), second pressure transducer (14), second flow sensor (15), storage tank (16), ball valve (17), relief valve (18), Pressure gauge (19), atmospheric valve (20) and relief valve on-line testing instrument (21)；
Multiple gas cylinders (1) and bus-bar (2) also connect composition high-pressure air source, the outlet of high-pressure air source is divided into two-way, and a road is connected with the entrance of surge tank (12) through stop valve (3), air relief valve (4), Pressure gauge (5), electromagnetic valve (6) and flow transducer (7) successively；Another road is connected with storage tank (16) upper port through ball valve (17), and storage tank (16) is further connected with relief valve (18) and Pressure gauge (19)；Being connected to temperature sensor (11) on surge tank (12), surge tank (12) upper outlet connects with relief valve grain-clamping table (8), and under surge tank (12), outlet is connected with atmospheric valve (20)；Surge tank (12) upper outlet is connected with the entrance of experimental safe valve (13), and the first pressure transducer (9) is connected on the porch of experimental safe valve (13)；Storage tank (16) outlet connects through the floss hole of second flow sensor (15), the second pressure transducer (14) and experimental safe valve (13)；Relief valve on-line testing instrument (21) is arranged on experimental safe valve (13)；First pressure transducer (9), temperature sensor (11), first flow sensor (7), second flow sensor (15) are connected with adjustment controlling test screen (10) with the second pressure transducer (14).
A kind of relief valve performance test the most according to claim 1 and on-line testing instrument calibration equipment, it is characterized in that: described experimental safe valve grain-clamping table (8), the hydraulic pressure scroll chuck using inside nominal diameter to be DN10 ~ 400mm, clamping inside nominal diameter is DN10 ~ 400mm relief valve.
A kind of relief valve performance test the most according to claim 1 and on-line testing instrument calibration equipment, it is characterised in that: the plurality of gas cylinder (1) is 2～10, is each attempted by bus-bar (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620280323.5U CN205719497U (en) | 2016-04-05 | 2016-04-05 | A kind of relief valve performance test and on-line testing instrument calibration equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620280323.5U CN205719497U (en) | 2016-04-05 | 2016-04-05 | A kind of relief valve performance test and on-line testing instrument calibration equipment |
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| CN205719497U true CN205719497U (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620280323.5U Expired - Fee Related CN205719497U (en) | 2016-04-05 | 2016-04-05 | A kind of relief valve performance test and on-line testing instrument calibration equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699068A (en) * | 2016-04-05 | 2016-06-22 | 杭州市特种设备检测研究院 | Safety valve performance testing and safety valve online calibrator calibrating device |
| CN107525660A (en) * | 2017-08-07 | 2017-12-29 | 裴渐强 | A kind of low-temperature safety valve calibration equipment |
| CN109540498A (en) * | 2017-09-18 | 2019-03-29 | 盐城市大丰燃气设备有限公司 | A kind of automatic testing method of gas safe diffusion valve |
| CN112128439A (en) * | 2020-10-13 | 2020-12-25 | 荆门宏图特种飞行器制造有限公司 | Safety valve back pressure device |
| CN114061937A (en) * | 2021-10-13 | 2022-02-18 | 中核核电运行管理有限公司 | Pilot-operated type safety valve shunt action test device |
| CN115931342A (en) * | 2023-03-15 | 2023-04-07 | 合肥通用机械研究院有限公司 | Comprehensive test bed for safety valve and comprehensive test method |
-
2016
- 2016-04-05 CN CN201620280323.5U patent/CN205719497U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699068A (en) * | 2016-04-05 | 2016-06-22 | 杭州市特种设备检测研究院 | Safety valve performance testing and safety valve online calibrator calibrating device |
| CN105699068B (en) * | 2016-04-05 | 2019-03-12 | 杭州市特种设备检测研究院 | Safety valve performance test and on-line testing instrument calibration equipment |
| CN107525660A (en) * | 2017-08-07 | 2017-12-29 | 裴渐强 | A kind of low-temperature safety valve calibration equipment |
| CN109540498A (en) * | 2017-09-18 | 2019-03-29 | 盐城市大丰燃气设备有限公司 | A kind of automatic testing method of gas safe diffusion valve |
| CN109540498B (en) * | 2017-09-18 | 2021-12-10 | 盐城市大丰燃气设备有限公司 | Automatic detection method for gas safety relief valve |
| CN112128439A (en) * | 2020-10-13 | 2020-12-25 | 荆门宏图特种飞行器制造有限公司 | Safety valve back pressure device |
| CN112128439B (en) * | 2020-10-13 | 2022-06-21 | 荆门宏图特种飞行器制造有限公司 | Back pressure device of safety valve |
| CN114061937A (en) * | 2021-10-13 | 2022-02-18 | 中核核电运行管理有限公司 | Pilot-operated type safety valve shunt action test device |
| CN114061937B (en) * | 2021-10-13 | 2024-06-11 | 中核核电运行管理有限公司 | Pilot operated safety valve shunt action test device |
| CN115931342A (en) * | 2023-03-15 | 2023-04-07 | 合肥通用机械研究院有限公司 | Comprehensive test bed for safety valve and comprehensive test method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20180405 |