CN105699068B - Safety valve performance test and on-line testing instrument calibration equipment - Google Patents
Safety valve performance test and on-line testing instrument calibration equipment Download PDFInfo
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- CN105699068B CN105699068B CN201610207995.8A CN201610207995A CN105699068B CN 105699068 B CN105699068 B CN 105699068B CN 201610207995 A CN201610207995 A CN 201610207995A CN 105699068 B CN105699068 B CN 105699068B
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- safety valve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention discloses a kind of safety valve performance test and on-line testing instrument calibration equipments.The outlet of high-pressure air source is connect through shut-off valve, pressure reducing valve, pressure gauge, solenoid valve and flow sensor with surge tank entrance all the way；Another way is connect through ball valve with storage tank, and safety valve and pressure gauge are further connected on storage tank；Temperature sensor is connected on surge tank, upper outlet connects with safety valve grain-clamping table, and lower outlet is connect with blow valve；The connection of the entrance of surge tank upper outlet and test safety valve, first pressure sensor connect in the inlet of test safety valve；Outlet is connected through second flow sensor, second pressure sensor with the discharge outlet of test safety valve；Safety valve on-line testing instrument is mounted on test safety valve；Two pressure sensors, temperature sensor and two flow sensors are connected with adjustment controlling test screen.The present invention can quickly test safe valve performance；Verify the accuracy of safety valve on-line testing instrument；The safety valve performance test of hot environment, back pressure environment can be simulated.
Description
Technical field
The present invention relates to safety valve performance test and calibration equipments, more particularly to a kind of safety valve performance test and online
Tester calibration equipment.
Background technique
Safety valve is that a kind of the most widely used safety is attached in the pressure-bearings class equipment such as boiler, pressure vessel, pressure pipeline
Part is more than the limiting value allowed to prevent pressure, it is ensured that the safe and reliable operation of system.Therefore, safety valve is as production system
The final decompression protection device of 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 generally fitted with safety valve and carry out overpressure protection to system, are especially opened entirely with spring
Formula safety valve is most widely used.And domestic relevant laws and regulations and standard do not provide specific discharge coefficient, such as GB 150-
2011 " pressure vessels " and GB/T 12241-2005 " safety valve generally requires " regulation take specified when discharge medium is gas
Discharge coefficient carries out the calculating of Methods of Safety Valve Discharge Capacity, and derated coefficient of discharge is provided by safety valve manufactory or is measured by test.
In safety valve factory, manufacturer can be all marked in derated coefficient of discharge on nameplate, this has resulted in calculating Methods of Safety Valve Discharge Capacity
Discharge coefficient is considered as unique definite value by Shi Keneng, and actually Safety Valve Relieve Coefficient is not only related with the structure size of valve, row
The difference for putting operating condition (there is certain back pressures in such as 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 actually incomplete, it is not necessarily suitable actual discharge operating condition.In addition,
Discharge capacity formula of the compressible gas under subcritical discharge as defined in domestic and international relevant laws and regulations and standard is only applicable to safety valve back
Known discharge capacity account is pressed, and the safety valve in actual production process is often connected with discharge tube, due to that can not be determined in advance
Pipeline crushing bring superimposed back pressure leads to safety so that cannot get actual safety valve back pressure carries out accurate discharge capacity account
Valve type selecting is inaccurate, and the test device for needing to simulate actual condition carries out safety valve performance test.
The unlatching of spring safety valve, closing motion are made by the pressure medium variation and initial tension of spring of its input end
Spool is automatically turned on and is closed.When pressure medium (internal pressure) be increased to lifting force it is bigger than initial tension of spring when, spool overcomes spring
Pretightning force automatically turns on, and extra medium of releasing makes interior drops, and due to the effect of spring force, when internal pressure is down to safety value
When, spool is automatically closed, stopping of releasing.Around this principle, online (also known as hot) measurement or when adjustment safety valve, if by
Outside provides a upward additional force, then when the summation of pressure medium and this additional force just overcomes initial tension of spring,
Spool equally can also be opened, or even under the conditions of offline (the also known as cold conditions) of the effect of no medium, individually be made every effort to overcome by external add-in
When taking initial tension of spring, spool can also be opened, and judging and opening method has base sonde method, audio frequency method, displacement method, additional external force curve at present
Inflection point, additional external force knee of curve are that safety valve on-line testing technology most mature at present sentences out criterion.Safety valve on-line testing
The safety valve testing precision key factor of instrument is to sentence out criterion accuracy, and especially knee of curve method of identification needs precisely to capture safety
The inflection point that valve is opened, when on-line testing can not Accurate Determining verify the parameters such as safety valve inlet pressure and flow, need it is a set of more
The calibration equipment of precision analog actual condition is added to verify the accuracy of safe on-line testing instrument.
Summary of the invention
In order to accurately measure existing spring loaded safety valve open with emission performance, verify the accurate of safety valve on-line testing instrument
Property, the purpose of the present invention is to provide a kind of safety valve performance test and on-line testing instrument calibration equipment, structure is relatively easy,
The device that manufacturing cost is relatively low, can quickly detect the performance of safety valve with verification on-line testing instrument accuracy.
The technical solution adopted by the present invention is that:
The present invention includes multiple high pressure gas cylinders, busbar connector, shut-off valve, pressure reducing valve, pressure gauge, flow sensor, first-class
Quantity sensor, safety valve grain-clamping table, first pressure sensor, adjustment controlling test screen, temperature sensor, surge tank, test peace
Full valve, second pressure sensor, second flow sensor, storage tank, ball valve, safety valve, pressure gauge, blow valve and safety valve are online
Tester；
Multiple high pressure gas cylinders and busbar connector simultaneously connect composition high-pressure air source, and the outlet of high-pressure air source is divided into two-way, all the way successively
It is connected through the entrance of shut-off valve, pressure reducing valve, pressure gauge, solenoid valve and flow sensor and surge tank；Another way is through ball valve and storage
Tank upper port connects, and is further connected with safety valve and pressure gauge on storage tank；Be connected to temperature sensor on surge tank, surge tank upper outlet with
Safety valve grain-clamping table connects, and outlet is connect with blow valve under surge tank；The connection of the entrance of surge tank upper outlet and test safety valve,
First pressure sensor connects in the inlet of test safety valve；Outlet is through second flow sensor, second pressure sensor
It is connected with the discharge outlet of test safety valve；Safety valve on-line testing instrument is mounted on test safety valve；First pressure sensor, temperature
Degree sensor, first flow sensor, second flow sensor and second pressure sensor are connected with adjustment controlling test screen.
The test safety valve grain-clamping table, the DN10~400mm for using Si Mingte (Jinan) company to produce is with hydraulic three-jaw
Chuck clamping, clamping inside nominal diameter are DN10~400mm safety valve.
The multiple high pressure gas cylinder is 2~10, is each attempted by busbar connector.
The invention has the advantages that:
1) can quickly test spring safety valve performance includes discharge amount, set-pressure, blow pressure；
2) accuracy of safety valve on-line testing instrument is verified；
3) the safety valve performance test of hot environment, back pressure environment, safe on-line testing instrument precision checking can be simulated.
Detailed description of the invention
Fig. 1 is principle schematic diagram of the invention.
Fig. 2 is test safety valve and safety valve on-line testing instrument installation diagram.
In figure: 1, multiple high pressure gas cylinders, 2, busbar connector, 3, shut-off valve, 4, pressure reducing valve, 5, pressure gauge, 6, solenoid valve, 7,
One flow sensor, 8, safety valve grain-clamping table, 9, first pressure sensor, 10, adjustment controlling test screen, 11, temperature sensor,
12, surge tank, 13, test safety valve, 14, second pressure sensor, 15, second flow sensor, 16, storage tank, 17, ball valve,
18, safety valve, 19, pressure gauge, 20, blow valve, 21, safety valve on-line testing instrument.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1 and Figure 2, the present invention includes multiple high pressure gas cylinders 1, busbar connector 2, shut-off valve 3, pressure reducing valve 4, pressure gauge
5, flow sensor 6, first flow sensor 7, safety valve grain-clamping table 8, first pressure sensor 9, adjustment controlling test screen 10,
Temperature sensor 11, surge tank 12, test safety valve 13, second pressure sensor 14, second flow sensor 15, storage tank 16,
Ball valve 17, safety valve 18, pressure gauge 19, blow valve 20 and safety valve on-line testing instrument 21.
Multiple high pressure gas cylinders 1 simultaneously connect composition high-pressure air source with busbar connector 2, and the outlet of high-pressure air source is divided into two-way, all the way according to
It is secondary to be connect through shut-off valve 3, pressure reducing valve 4, pressure gauge 5, solenoid valve 6 and flow sensor 7 with the entrance of surge tank 12；Another way warp
Ball valve 17 is connect with 16 upper port of storage tank, and safety valve 18 and pressure gauge 19 are further connected on storage tank 16；Temperature is connected on surge tank 12
Sensor 11,12 upper outlet of surge tank connect with safety valve grain-clamping table 8, and the lower outlet of surge tank 12 is connect with blow valve 20；Buffering
12 upper outlet of tank is connect with the entrance of test safety valve 13, and first pressure sensor 9 connects in the inlet of test safety valve 13；Storage
The outlet of tank 16 is connected through second flow sensor 15, second pressure sensor 14 with the discharge outlet of test safety valve 13；Safety valve
On-line testing instrument 21 is mounted on test safety valve 13；First pressure sensor 9, temperature sensor 11, first flow sensor
7, second flow sensor 15 and second pressure sensor 14 are connected with adjustment controlling test screen 10.
The test safety valve grain-clamping table 8, the DN10~400mm for using Si Mingte (Jinan) company to produce is with hydraulic three-jaw
Chuck clamping, clamping inside nominal diameter are DN10~400mm safety valve.
The multiple high pressure gas cylinder 1 is 2~10, is each attempted by busbar connector 2.
Adjustment controlling test screen 10 and safety valve on-line testing instrument 21 are standard component, can be chosen on the market.
The working principle of the invention is:
1) unlatching of test safety valve 13, closing motion are the high-pressure air sources 1 by its input end by being decompressed to buffering
Tank 12, in surge tank 12 pressure medium variation or apply external force offset 13 initial tension of spring of test safety valve make spool open and
It closes.When 12 pressure of surge tank (internal pressure) be increased to lifting force it is bigger than initial tension of spring when (can when simulating Safety valve on-line testing
Test safety valve 13 is promoted to by the lifting device reinforcing of safety valve on-line testing instrument 21 to discharge), spool overcomes spring pre-tightening
Power is opened, and extra medium of releasing, 13 inlet pressure of test safety valve continues to increase, and test safety valve 13 is opened into highest height
Degree, reaches specified discharge amount, after the medium of high pressure is released, interior drops is made (can to pass through peace when simulating Safety valve on-line testing
Full valve on-line testing instrument 21 discharges lifting force and returns seat by test safety valve 13), and due to the effect of spring force, when internal pressure is down to peace
When total head, spool is closed, stopping of releasing.
2) for there are the test safety valves 13 of back pressure, certain pressure is connect (according to test in the outlet of test safety valve 13
Depending on safety valve applying working condition) storage tank 16, the size of back pressure can pass through high-pressure air source, and (high pressure gas cylinder 1 and busbar connector 2 export ball
Valve 17) adjust the pressure of storage tank 16.
3) in test safety valve 13 from being opened into closing process, adjustment controlling test screen 10 passes through acquisition test pipeline
First pressure sensor 9, temperature sensor 11, first flow sensor 7, back pressure unit second flow sensor 15 and second
14 data of pressure sensor, draw entire test safety valve 13 test the pressure history of process, flow changing curve figure from
And reach the test of test safety valve 13 Yu safety valve on-line testing instrument 21.
Safety valve performance test:
1) test safety valve 13 is fixed on safety valve hydraulic grain-clamping table 8；
2) first pressure sensor 9, the second pressure sensor 14, first flow sensor 7, second of suitable for range are selected
Flow sensor 15 and temperature sensor 11 are installed on pipeline；
3) 10 power supply of adjustment controlling test screen, first pressure sensor 9, second pressure sensor 14, first flow are opened
Sensor 7, second flow sensor 15 and temperature sensor 11 are in state to be collected；
4) high-pressure air source of high pressure gas cylinder 1 is opened to (the volume 5m of storage tank 163) ball valve 17, when storage tank 16 reaches setting
Pressure is closed ball valve 17 (when need to have back pressure test)；
5) high-pressure air source for opening high pressure gas cylinder 1, opens shut-off valve 3, and high pressure gas connects pressure gauge 5, electromagnetism through pressure reducing valve 4
Valve 6 is opened, and (the volume 1m of surge tank 12 is made3) it is forced into that test safety valve 13 is micro- to be opened, moment is opened in the acquisition of first pressure sensor 9
Internal pressure Pz, this pressure is the set-pressure of test safety valve 13；
6) test loine pressure is increased to 13 full open of test safety valve, discharges about 5 second time, at this time adjustment controlling test
The data P of the first pressure sensor 9 of 10 acquisition of screen0, second pressure sensor 14 data p1, temperature sensor 11 data
T0, the flow area A of safety valve 13 is inputted, provides that the theoretical displacement of compressible gas is counted as the following formula by formula GB150-2011
It calculates:
In formula: W-Methods of Safety Valve Discharge Capacity value, kg/s；
The minimum discharge area of A-safety valve or rupture disk, mm2；
K-discharge coefficient；
P1- safety valve back pressure (absolute pressure)；kPa；
P0The discharge pressure (absolute pressure) of-safety valve, including set-pressure and excessive pressure limit two parts, kPa；
M-gas molal weight, kg/kmol；
Z-gas compressed coefficient, for air Z=1.0；
Adiabatic exponent of the k-in discharge under import situation (for perfect gas, k is equal to specific heat ratio)
T0The temperature of-gas, K.
The displacement value of test safety valve 13 is calculated by formula (2)；
7) closing solenoid valve 6 reduces test loine pressure, and 13 valve of test safety valve is made to return seat, and adjustment controlling test screen 10 is logical
It crosses first pressure sensor 9 and acquires the blow pressure P that pressure is safety valve 13H；
8) stop high-pressure air source gas supply, open blow valve 20 and release loine pressure, remove test safety valve 13.
The verification of safety valve on-line testing instrument:
1) it will be fixed on safety valve hydraulic grain-clamping table 8 by the test safety valve 13 of above-mentioned Experimental Calibration；
2) safe 21 frame of on-line testing instrument is fixed on test safety valve 13, selects safety valve on-line testing instrument
The suitable range of pressure sensor built in 21；
3) first pressure sensor 9, the second pressure sensor 14, first flow sensor 7, second of suitable for range are selected
Flow sensor 15 and temperature sensor 11 are installed on pipeline；
4) 10 power supply of adjustment controlling test screen, first pressure sensor 9, second pressure sensor 14, first flow are opened
Sensor 7, second flow sensor 15 and temperature sensor 11 are in state to be collected；
5) high-pressure air source of high pressure gas cylinder 1 is opened to (the volume 5m of storage tank 163) ball valve 17, when storage tank 16 reaches setting
Pressure is closed ball valve 17 (when need to have back pressure test)；
6) high-pressure air source for opening high pressure gas cylinder 1, opens shut-off valve 3, and high pressure gas connects pressure gauge 5, electromagnetism through pressure reducing valve 4
Valve 6 is opened, and increases 12 pressure of surge tank to the 70% of 13 cracking pressure of test safety valve；
7) lifting device of safety valve on-line testing instrument 21 is opened, reinforcing to test safety valve 13 is opened.
It is opened moment in test safety valve 13, safety valve on-line testing instrument 21 acquires the data F of external add-in powerW, adjustment
Controlling test screen 10 acquires data P by first pressure sensor 9L, second pressure sensor 14 acquire data P1, input safety
The data A of the flow area of valve 13 is calculated the set-pressure of test safety valve 13 by formula (2), (3).The condition that spool is opened
Are as follows:
FT=FW+PL×A
Wherein: FT--- initial tension of spring；FW--- external add-in power；
PL--- medium actuating pressure；A --- flow area.
Then set-pressure P are as follows: P=PL+FW/A (2)
When system is there are when back pressure, then set-pressure P are as follows: 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 gas supply, open blow valve 20 and release loine pressure, remove 21 He of safety valve on-line testing instrument
Test safety valve 13.
Above-mentioned specific embodiment is used to illustrate the present invention, rather than limits the invention, of the invention
In spirit and scope of protection of the claims, to any modifications and changes that the present invention makes, protection model of the invention is both fallen within
It encloses.
Claims (3)
1. a kind of safety valve performance test and on-line testing instrument calibration equipment, it is characterised in that: including multiple high pressure gas cylinders (1),
Busbar connector (2), shut-off valve (3), pressure reducing valve (4), pressure gauge (5), flow sensor (6), first flow sensor (7), safety
Valve grain-clamping table (8), first pressure sensor (9), adjustment controlling test screen (10), temperature sensor (11), surge tank (12), examination
Test safety valve (13), second pressure sensor (14), second flow sensor (15), storage tank (16), ball valve (17), safety valve
(18), pressure gauge (19), blow valve (20) and safety valve on-line testing instrument (21)；
Multiple high pressure gas cylinders (1) and busbar connector (2) simultaneously connect composition high-pressure air source, and the outlet of high-pressure air source is divided into two-way, all the way according to
It is secondary through shut-off valve (3), pressure reducing valve (4), pressure gauge (5), solenoid valve (6) and flow sensor (7) and surge tank (12) entrance
Connection；Another way is connect through ball valve (17) with storage tank (16) upper port, and safety valve (18) and pressure gauge are further connected on storage tank (16)
(19)；It is connected on surge tank (12) temperature sensor (11), surge tank (12) upper outlet connects with safety valve grain-clamping table (8), delays
Outlet under tank (12) is rushed to connect with blow valve (20)；Surge tank (12) upper outlet is connect with the entrance of test safety valve (13), the
One pressure sensor (9) connects in the inlet of test safety valve (13)；Storage tank (16) outlet is through second flow sensor (15), the
Two pressure sensors (14) are connected with the discharge outlet of test safety valve (13)；Safety valve on-line testing instrument (21) is mounted on test peace
In full valve (13)；First pressure sensor (9), temperature sensor (11), first flow sensor (7), second flow sensor
(15) it is connected with second pressure sensor (14) with adjustment controlling test screen (10)；Working principle is:
1) unlatching of test safety valve (13), closing motion are the high pressure gas cylinders (1) by its input end by being decompressed to buffering
Tank (12), the interior pressure medium variation of surge tank (12) or application external force offset test safety valve (13) initial tension of spring to make spool
It unlatches and closes；
2) for there are the test safety valve of back pressure (13), connect storage tank (16) in the outlet of test safety valve (13), back pressure it is big
The small pressure that storage tank (16) are adjusted by high-pressure air source；
3) in test safety valve (13) from being opened into closing process, (10 pass through acquisition test pipeline to adjustment controlling test screen
First pressure sensor (9), temperature sensor (11), first flow sensor (7), back pressure unit second flow sensor
(15) and second pressure sensor (14) data pressure history, the stream of entire test safety valve (13) test process, are drawn
Amount change curve is to reach the test of test safety valve (13) Yu safety valve on-line testing instrument (21).
2. a kind of safety valve performance test according to claim 1 and on-line testing instrument calibration equipment, it is characterised in that: institute
Test safety valve grain-clamping table (8) are stated, the DN10 ~ 400mm for using Si Mingte (Jinan) company to produce is clamped with hydraulic scroll chuck,
Clamping inside nominal diameter is DN10 ~ 400mm safety valve.
3. a kind of safety valve performance test according to claim 1 and on-line testing instrument calibration equipment, it is characterised in that: institute
Stating multiple high pressure gas cylinders (1) is 2~10, is each attempted by busbar connector (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610207995.8A CN105699068B (en) | 2016-04-05 | 2016-04-05 | Safety valve performance test and on-line testing instrument calibration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610207995.8A CN105699068B (en) | 2016-04-05 | 2016-04-05 | Safety valve performance test and on-line testing instrument calibration equipment |
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| Publication Number | Publication Date |
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| CN105699068A CN105699068A (en) | 2016-06-22 |
| CN105699068B true CN105699068B (en) | 2019-03-12 |
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| CN201610207995.8A Expired - Fee Related CN105699068B (en) | 2016-04-05 | 2016-04-05 | Safety valve performance test and on-line testing instrument calibration equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108362489A (en) * | 2018-03-27 | 2018-08-03 | 河南省铭澳特种设备检测有限公司 | A kind of versatile testing device of safety valve |
| CN109186982A (en) * | 2018-09-25 | 2019-01-11 | 芜湖优能自动化设备有限公司 | A kind of pressure-detecting device for relief valve |
| CN112345232A (en) * | 2020-10-30 | 2021-02-09 | 湖北特种设备检验检测研究院 | Online checking device capable of being provided with built-in safety valve and using method |
| CN113074933B (en) * | 2021-03-18 | 2024-05-03 | 深圳市质量安全检验检测研究院 | Safety valve displacement testing device and method |
| CN112945544A (en) * | 2021-03-26 | 2021-06-11 | 重庆科技学院 | Intelligent setting pressure measuring system for safety valve |
| CN114199551B (en) * | 2021-11-22 | 2023-01-06 | 华中科技大学 | High-speed flow impact testing device and method for high-pressure one-way valve |
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