CN201532347U - Rupture disk flow resistance coefficient testing system - Google Patents

Abstract

A rupture disk flow resistance coefficient testing system comprises the following components: a power source (101), an on-off valve (104), a stagnation vessel (105), a nozzle block (106), a collection vessel (107), a rupture disk mounting clamp plate (109), a testing pipeline (110) and a testing element (100), wherein all the components except for the testing pipeline (110) and the testing element (100) are arranged on the testing pipeline (110) in a manner of sequential series connection arrangement; and the testing element (100) is arranged between the other two optional components or among the other components. The utility model has the advantages of high flow rate measuring accuracy and wide measuring range of the testing system; moreover, the utility model can carry out the flow resistance coefficient test under the condition of lower than rupture pressure of the rupture disk, reduces energy consumption in the testing process and also lowers noises in the testing process, thereby conforming to the energy-saving and environment-friendly requirements.

Description

A kind of flow resistance coefficient of bursting sheet test macro

Technical field

The present invention relates to the rupture disk measuring technology, a kind of flow resistance coefficient of bursting sheet test macro is provided especially.

Background technology

Rupture disk is the safety feature that is widely used on boiler, pressure vessel and the pressure pipeline system of departments such as chemical industry, petrochemical complex, oil refining, metallurgy, pharmacy, food, the energy, power.The application scenario of rupture disk mainly is high pressure, medium such as inflammable, explosive, poisonous, and its working condition requirement is higher, is the production run of chemical reaction etc. mostly.These production runes are prone to pressure rapid fluctuation or the fierce chemical reaction so that the possibility of blasting of course of reaction.Because being the situation that does not allow the medium seepage mostly, these production runes of singularity of medium take place, and in case occur unexpected, require safety relief device that high dynamic response is arranged again, and enough amounts of releasing are arranged, so that the consequence of the unlikely generation havoc in production equipment and place.Or the working temperature of equipment is higher, and under the situation that safety valve can't adapt to, also essential use rupture disk is as safety relief device.

Therefore, requiring rupture disk can be suitable for this phase transformation superpressure rapidly, gas chemistry fires superpressure and dust and fires the situation that requirement such as superpressure has big discharge capacity.By the scope of application requirement of GB567-1999 " rupture disk and blasting piece device ", rupture disk can be made all size of diameter 5-1500mm, burst pressure 0.001-500MPa usually, to adapt to the requirement of the various amounts of releasing.Current rupture disk is made and has been adopted a lot of high-tech means, and material comprises stainless steel, magnesium, nickel, titanium, alloy and graphite etc., adapts to different medium and temperature, and the dynamic response characteristic excellence also has very strong corrosion resistance and fatigue durability simultaneously.The version of rupture disk has over one hundred kind, and very high technology content and high price are arranged.This has higher requirement just for the detection and the test of rupture disk.

Summary of the invention

The purpose of this utility model provides a kind of flow resistance coefficient of bursting sheet test macro of filling up technological gap.

A kind of flow resistance coefficient of bursting sheet test macro of the utility model is characterized in that: described flow resistance coefficient of bursting sheet test macro specifically includes following part: rupture disk fluid resistance test macro, rupture disk flow testing system;

Being constructed as follows of described rupture disk fluid resistance test macro: power source (101), switch valve (104), stagnation container (105), nozzle sets (106), collection container (107), rupture disk are installed clamping plate (109), test pipeline (110), testing element (100); Wherein, all be arranged in except that test pipeline (110), testing element (100) are in the above-mentioned ingredient and test on the pipeline (110) in the mode of order arranged in series; Testing element (100), be arranged between other any two component parts or in other ingredients.

Also be provided with the pressure regulator (102) that is used for pressure regulation between power source (101) in described flow resistance coefficient of bursting sheet test macro and the switch valve (104).

Collection container (107) in described flow resistance coefficient of bursting sheet test macro and rupture disk are installed between the clamping plate (109) and also are provided with surge tank (108).

Power source (101) in described flow resistance coefficient of bursting sheet test macro is for providing compressed-air actuated propulsion system: screw air compressor for example.

The utility model is to be purpose with the test, and principal feature is that the equipment work frequency is lower, but requires that the scope of application is big, measuring accuracy is higher.Investment and the place of considering equipment take, and we select for use the gas drive pump as rising pressure source.Therefore as the air compressor machine of power source with the one-tenth equipment of attaching most importance to.We select for use screw air compressor as power source, have disposed cooling driers and air cushioning jar for improving air quality.

Testing element (100) in described flow resistance coefficient of bursting sheet test macro is specially pressure transducer; It specifically is arranged on one of following position or its combination:

Between power source (101) and the pressure regulator (102), between pressure regulator (102) and the switch valve (104), on the stagnation container (105), on the collection container (107), on the surge tank (108), surge tank (108) and rupture disk are installed between the clamping plate (109) and are tested pipeline (110), and rupture disk is installed the side of clamping plate (109) away from surge tank (108).

In described flow resistance coefficient of bursting sheet test macro, also include temperature sensor (111); It specifically is arranged on stagnation container (105) or/and on the surge tank (108).

In described flow resistance coefficient of bursting sheet test macro,

Flow testing system is by including 4 sonic nozzles, 5 pneumatic ball valves, 4 pressure transducers, 1 temperature sensor, 1 stagnation container, 1 collection container;

The fluid resistance test macro includes 1 surge tank, 5 testing conduits, 2 absolute pressure pressure transducers, 3 differential pressure pressure transducers, 1 temperature sensor and 1 humidity sensor.

In described flow resistance coefficient of bursting sheet test macro, also be provided with industrial computer as controller.

In described flow resistance coefficient of bursting sheet test macro, also be provided with at test pipeline end exhaust box can be installed.But to test and assess the influence that exhaust box is measured for the rupture disk resistance coefficient.

The utility model mainly is made up of flow testing system and resistance measurement system two parts; Wherein: flow rate test partly is specially the flow standard device, is made up of one group of sonic nozzle and sensor, and its application can obtain higher precision and bigger flow measurement range.The resistance measurement part is made up of surge tank, test pipeline and sensor etc.Carry out system's control, parameter measurement, data storage, calculating as a result etc. by an industrial computer.

Flow through the fluid flow of this device and each point pressure on the test pipeline by accurate measurement, but the resistance coefficient of accurate Calculation fluid in the test pipeline.After in the test pipeline, putting into rupture disk, measure the resistance coefficient in the pipeline again, its added value is the resistance coefficient of rupture disk.

The medium of fluid resistance test is a pressurized air, the shared cover compressed air source unit of its source of the gas and bursting pressure of bursting sheet pilot system.

Flow Measuring System is made up of pressure regulator, switch valve, stagnation container, nozzle sets, collection container and pneumatic ball valve and pipeline.By the pressurized air of air reservoir supply, regulate and be stabilized in a certain pressure limit through pressure regulator.By pressure transducer P ₂And P ₃Gaseous tension after indication source of the gas and the pressure regulation.By absolute pressure transmitter P ₀With temperature sensor T ₀The stagnation that records sonic nozzle is pressed and stagnation temperature.Nozzle is opened in flow range decision according to test, records pressure by P4 and determines whether fluid reaches velocity of sound in the nozzle.If reach velocity of sound, pass through P ₀, T ₀Reach the mass rate or the volumetric flow rate of calculation of parameter test(ing) mediums such as efflux coefficient C.In case of necessity result calculated is carried out the humidity correction of test(ing) medium.

Flow through the fluid flow of this device and each point pressure on the test pipeline by accurate measurement, but the resistance coefficient of accurate Calculation fluid in the test pipeline.After in the test pipeline, putting into rupture disk, measure the resistance coefficient in the pipeline again, its added value is the resistance coefficient of rupture disk.

When actual experiment is operated

Check whether each valve is in opening, except that lead to flow resistance test should close with the valve of gas-holder (when not doing the flow resistance system testing) other valve all should open.The air compressor machine in the power turn-on case and the air switch of cooling driers are pressed the start button on air compressor machine and the cooling driers, air compressor machine and cooling driers entry into service.

Pretest inspection requires: the inspection machine running status, and listen machine run sound whether normal, check whether the indicating value of surge tank upward pressure table reaches setting value.The operation instructions of air compressor machine are please conscientiously read in the operation of air compressor machine and maintenance.

If close air compressor machine, press stop botton.After machine is out of service, powered-down again.Air compressor machine is not pressed the scram button shutdown when non-emergent, more cannot directly cut off the mode of air switch and shut down.

In the utility model:

Flow testing system is made up of 4 sonic nozzles, 5 pneumatic ball valves, 4 pressure transducers, 1 temperature sensor and stagnation container and collection container.See the first half of Fig. 2 and Fig. 1, it is operated by computer control.

The fluid resistance test macro is made up of the testing conduit of surge tank, 5 different-diameters, 2 absolute pressure pressure transducers, 3 differential pressure pressure transducers, 1 temperature sensor and 1 humidity sensor.See the latter half of Fig. 1, its operation and calculating are finished by computing machine.Method of operating is seen the software operation part.

Advantage of the present utility model: the flow resistance test macro of this device has utilized the sonic nozzle group to carry out flow rate test, can effectively improve the test specification of flow rate test precision and device.

Flow resistance coefficient proving installation in the system can be finished being lower than and carry out flow resistance coefficient test under the condition of bursting pressure of bursting sheet, has promptly reduced the energy resource consumption of test process, has also reduced the noise of process of the test simultaneously.Meet current energy-conserving and environment-protective requirement.

Description of drawings

The present invention is further detailed explanation below in conjunction with drawings and the embodiments:

Fig. 1 is a rupture disk fluid resistance test macro synoptic diagram;

Fig. 2 is the flow testing system synoptic diagram;

Fig. 3 is that the hardware configuration of flow resistance coefficient of bursting sheet detection system is formed synoptic diagram;

Fig. 4 is a flow resistance coefficient of bursting sheet detection system input channel wiring diagram;

Fig. 5 is flow resistance coefficient of bursting sheet detection system output switching value structural drawing.

Embodiment

Each Reference numeral implication (wherein, as label implications such as 28-1,28-2 all corresponding same label 28 on figure) as shown in the table in the accompanying drawing 2:

Table 1

Embodiment 1

A kind of flow resistance coefficient of bursting sheet test macro is characterized in that: described flow resistance coefficient of bursting sheet test macro specifically includes following part: rupture disk fluid resistance test macro, rupture disk flow testing system.

Being constructed as follows of described rupture disk fluid resistance test macro: power source (101), pressure regulator (102), switch valve (104), stagnation container (105), nozzle sets (106), collection container (107), surge tank (108), rupture disk are installed clamping plate (109), test pipeline (110), testing element (100); Wherein, all be arranged in except that test pipeline (110), testing element (100) are in the above-mentioned ingredient and test on the pipeline (110) in the mode of order arranged in series; Testing element (100), be arranged between other any two component parts or in other ingredients.

Also be provided with the pressure regulator (102) that is used for pressure regulation between power source (101) in described flow resistance coefficient of bursting sheet test macro and the switch valve (104).

Collection container (107) in described flow resistance coefficient of bursting sheet test macro and rupture disk are installed between the clamping plate (109) and also are provided with surge tank (108).

Power source (101) in described flow resistance coefficient of bursting sheet test macro is for providing compressed-air actuated propulsion system: screw air compressor for example.

Present embodiment is to be purpose with the test, and principal feature is that the equipment work frequency is lower, but requires that the scope of application is big, measuring accuracy is higher.Investment and the place of considering equipment take, and we select for use the gas drive pump as rising pressure source.Therefore as the air compressor machine of power source with the one-tenth equipment of attaching most importance to.We select for use screw air compressor as power source, have disposed cooling driers and air cushioning jar for improving air quality.

Testing element (100) in described flow resistance coefficient of bursting sheet test macro is specially pressure transducer; It specifically is arranged on one of following position or its combination:

Between power source (101) and the pressure regulator (102), between pressure regulator (102) and the switch valve (104), on the stagnation container (105), on the collection container (107), on the surge tank (108), surge tank (108) and rupture disk are installed between the clamping plate (109) and are tested pipeline (110), and rupture disk is installed the side of clamping plate (109) away from surge tank (108).

In described flow resistance coefficient of bursting sheet test macro, also include temperature sensor (111); It specifically is arranged on stagnation container (105) or/and on the surge tank (108).

In described flow resistance coefficient of bursting sheet test macro:

Flow testing system is by including 4 sonic nozzles, 5 pneumatic ball valves, 4 pressure transducers, 1 temperature sensor, 1 stagnation container, 1 collection container;

The fluid resistance test macro includes the testing conduit of 1 surge tank, 5 different-diameters, 2 absolute pressure pressure transducers, 3 differential pressure pressure transducers, 1 temperature sensor and 1 humidity sensor.

In described flow resistance coefficient of bursting sheet test macro, also be provided with and be used to carry out the industrial computer of system's control, parameter measurement, data storage, result's calculating as controller.

In described flow resistance coefficient of bursting sheet test macro, in order to reduce the noise of exhaust, also be provided with at test pipeline end exhaust box can be installed.But to test and assess the influence that exhaust box is measured for the rupture disk resistance coefficient.

Present embodiment mainly is made up of flow testing system and resistance measurement system two parts; Wherein: flow rate test partly is specially the flow standard device, is made up of one group of sonic nozzle and sensor, and its application can obtain higher precision and bigger flow measurement range.The resistance measurement part is made up of surge tank, test pipeline and sensor etc.Carry out system's control, parameter measurement, data storage, calculating as a result etc. by an industrial computer.

Flow through the fluid flow of this device and each point pressure on the test pipeline by accurate measurement, but the resistance coefficient of accurate Calculation fluid in the test pipeline.After in the test pipeline, putting into rupture disk, measure the resistance coefficient in the pipeline again, its added value is the resistance coefficient of rupture disk.

The medium of fluid resistance test is a pressurized air, the shared cover compressed air source unit of its source of the gas and bursting pressure of bursting sheet pilot system.

Flow Measuring System is made up of pressure regulator, switch valve, stagnation container, nozzle sets, collection container and pneumatic ball valve and pipeline.By the pressurized air of air reservoir supply, regulate and be stabilized in a certain pressure limit through pressure regulator.By pressure transducer P ₂And P ₃Gaseous tension after indication source of the gas and the pressure regulation.By absolute pressure transmitter P ₀With temperature sensor T ₀The stagnation that records sonic nozzle is pressed and stagnation temperature.Nozzle is opened in flow range decision according to test, records pressure by P4 and determines whether fluid reaches velocity of sound in the nozzle.If reach velocity of sound, pass through P ₀, T ₀Reach the mass rate or the volumetric flow rate of calculation of parameter test(ing) mediums such as efflux coefficient C.In case of necessity result calculated is carried out the humidity correction of test(ing) medium.

Flow through the fluid flow of this device and each point pressure on the test pipeline by accurate measurement, but the resistance coefficient of accurate Calculation fluid in the test pipeline.After in the test pipeline, putting into rupture disk, measure the resistance coefficient in the pipeline again, its added value is the resistance coefficient of rupture disk.

When actual experiment is operated, need to check whether each valve be in opening, except that lead to the flow resistance test should close with the valve of gas-holder (when not doing the flow resistance system testing) other valve all should open.The air compressor machine in the power turn-on case and the air switch of cooling driers are pressed the start button on air compressor machine and the cooling driers, air compressor machine and cooling driers entry into service.

Pretest inspection requires: the inspection machine running status, and listen machine run sound whether normal, check whether the indicating value of surge tank upward pressure table reaches setting value.The operation instructions of air compressor machine are please conscientiously read in the operation of air compressor machine and maintenance.

If close air compressor machine, press stop botton.After machine is out of service, powered-down again.Air compressor machine is not pressed the scram button shutdown when non-emergent, more cannot directly cut off the mode of air switch and shut down.

In the present embodiment: flow testing system is made up of 4 sonic nozzles, 5 pneumatic ball valves, 4 pressure transducers, 1 temperature sensor and stagnation container and collection container.See the first half of Fig. 2 and Fig. 1, it is operated by computer control.

The fluid resistance test macro is made up of the testing conduit of surge tank, 5 different-diameters, 2 absolute pressure pressure transducers, 3 differential pressure pressure transducers, 1 temperature sensor and 1 humidity sensor.See the latter half of Fig. 1, its operation and calculating are finished by computing machine.Method of operating is seen the software operation part.

Embodiment 2

The described rupture disk fluid resistance of present embodiment test macro mainly is made up of flow testing system and resistance measurement system two parts.The flow rate test part is made up of one group of sonic nozzle and sensor the used flow standard device of similar metrological service checking flow meter, and its application can obtain higher precision and bigger flow measurement range.The resistance measurement part is made up of surge tank, test pipeline and sensor etc.Carry out system's control, parameter measurement, data storage, calculating as a result etc. by an industrial computer.

Flow through the fluid flow of this device and each point pressure on the test pipeline by accurate measurement, but the resistance coefficient of accurate Calculation fluid in the test pipeline.After in the test pipeline, putting into rupture disk, measure the resistance coefficient in the pipeline again, its added value is the resistance coefficient of rupture disk.

Present embodiment is to be purpose with the test, and principal feature is that the equipment work frequency is lower, but requires that the scope of application is big, measuring accuracy is higher.Investment and the place of considering equipment take, and we select for use the gas drive pump as rising pressure source.Therefore as the air compressor machine of power source with the one-tenth equipment of attaching most importance to.We select for use screw air compressor as power source, have disposed cooling driers and air cushioning jar for improving air quality.

During practical operation, check at first whether each valve is in opening, except that lead to flow resistance test should close with the valve of gas-holder (when not doing the flow resistance system testing) other valve all should open.The air compressor machine in the power turn-on case and the air switch of cooling driers are pressed the start button on air compressor machine and the cooling driers, air compressor machine and cooling driers entry into service.

Whether the inspection machine running status listens machine run sound normal, checks whether the indicating value of surge tank upward pressure table reaches setting value.The operation instructions of air compressor machine are please conscientiously read in the operation of air compressor machine and maintenance.

If close air compressor machine, press stop botton.After machine is out of service, powered-down again.Air compressor machine is not pressed the scram button shutdown when non-emergent, more cannot directly cut off the mode of air switch and shut down.

Flow testing system is made up of 4 sonic nozzles, 5 pneumatic ball valves, 4 pressure transducers, 1 temperature sensor and stagnation container and collection container.See the first half and Fig. 2 of Fig. 1, it is operated by computer control.Method of operating is seen the software operation part.

The fluid resistance test macro is made up of the testing conduit of surge tank, 5 different-diameters, 2 absolute pressure pressure transducers, 3 differential pressure pressure transducers, 1 temperature sensor and 1 humidity sensor.See the latter half of 2, its operation and calculate and finish by computing machine.Method of operating is seen the software operation part.

We select pressurized air as tested media, mainly are that the pressurized air ratio that obtains different pressures is easier to, and cost is lower, test environment cleaning and flow stability control relatively also than being easier to etc.But owing to will improve measuring accuracy, selected sonic nozzle for use, then brought bigger system's operation noise.

System uses 50m ³Air reservoir as the source of supply of test(ing) medium.Pressure medium 0.9-1.0MPa, processing such as undried.

Present flowmeter kind is a lot, but under big flow, reach higher precision and failure rate lower also surely belong to sonic nozzle.Therefore the sonic nozzle department that also is measured uses as the standard of checking flow meter.

Present embodiment has selected for use 10mm, 20mm, 4 sonic nozzles of 40mm, 50mm to form a nozzle sets, can obtain 117.724m3/h to 15 kinds of 5303.217m3/h (standard state) different flow ranges under the test(ing) medium pressure of 0.20MPa (absolute pressure).By improving the pressure of test(ing) medium, can form different flow ranges.When test(ing) medium pressure reaches 0.60MPa (absolute pressure), can obtain to be up to the multiple flow combination of 15909.651m3/h (standard state).This combination can make the measuring accuracy of each range section meet the demands.

These 4 nozzles are demarcated by China National Measuring Science Research Inst. after accurately processing, and its precision all reaches 0.2%.Conclusion is used for can be used as standard.Be not less than 0.1% pressure transducer and temperature sensor through the adapted precision, flow testing system and precision will be not less than 1%.If air drying or use humidity biography device are calculated correction, can further improve flow and survey

The accuracy of test system.

The measuring accuracy of flow is except that being subjected to the nozzle precision, and most importantly the precision by sensor determines.Measure the pressure and temperature even the humidity of liquid accurately, all will influence the measurements and calculations result of flow.We select U.S. ROSEMOUNT 3051C type absolute pressure transmitter for use for this reason, its precision is 0.046%, directly the absolute pressure value of the stagnation pressure of gaging nozzle has avoided normally used pressure transducer measure gage pressure to add twice error that local atmospheric measurements and calculations process is brought.

The integrated two ends of the AD590 monolithic temperature-sensitive current source that temperature survey has then selected for use ADI to produce, temperature range-55 ℃～155 ℃, 1 μ A/K is exported in nonlinearity erron ± 0.3 ℃.Its use will reduce sensor and add the error that transmitter produces.

Humidity sensor also can be selected by system, and the error of conventional humidity sensor is 2%, behind the employing humidity sensor, can carry out corrected Calculation to the humidity of test(ing) medium, helps further improving the measuring accuracy of system.

Flow Measuring System is made up of pressure regulator, switch valve, stagnation container, nozzle sets, collection container and pneumatic ball valve and pipeline.By the pressurized air of air reservoir supply, regulate and be stabilized in a certain pressure limit through pressure regulator.By pressure transducer P ₂And P ₃Gaseous tension after indication source of the gas and the pressure regulation.By absolute pressure transmitter P ₀With temperature sensor T ₀The stagnation that records sonic nozzle is pressed and stagnation temperature.Nozzle is opened in flow range decision according to test, records pressure by P4 and determines whether fluid reaches velocity of sound in the nozzle.If reach velocity of sound, pass through P ₀, T ₀Reach the mass rate or the volumetric flow rate of calculation of parameter test(ing) mediums such as efflux coefficient C.In case of necessity result calculated is carried out the humidity correction of test(ing) medium.

Synoptic diagram symbol description among Fig. 1:

P ₀---sonic nozzle stagnation pressure (absolute pressure), MPa;

T ₀---sonic nozzle stagnation temperature (absolute pressure), ℃;

P ₁---testing conduit inlet pressure (absolute pressure), MPa;

T ₁---testing conduit temperature in (absolute pressure), ℃;

P ₂---test bleed pressure (gauge pressure), MPa;

P ₃---pressure behind the pressure regulator (gauge pressure), MPa;

P ₄---collection container pressure (gauge pressure), MPa;

P _A-B---the differential pressure that testing conduit A point and B are ordered, MPa;

P _B---testing conduit B point pressure (absolute pressure), MPa;

P _B-C---the differential pressure that testing conduit B point and C are ordered, MPa;

P _C-D---the differential pressure that testing conduit C point and D are ordered, MPa;

R _H---the air humidity of testing conduit inlet, %.

The hardware configuration of rupture disk flow resistance detection system as shown in Figure 3.

The hsrdware requirements of system:

Processor: Intel Pentium 41.4GHz or higher;

Internal memory: 256MB or higher;

Hard disk: 1G or higher;

Video memory: 32MB;

Input: keyboard, mouse.

The software requirement of system:

Operating system: Microsoft Windows XP/2000;

Pre-installed software: Microsoft Office 2003 or more than;

System component: Microsoft.Net Framework 2.0 or more than.

The system software operation instructions:

After the login system, on main interface, click [system calibration] button, promptly enter the system calibration function.System calibration is mainly calibrated each sensor in the system (comprising pressure, temperature, humidity etc.).

Shown corresponding range and currency on the interface,, only need click sensor pairing [calibration] button, can enter corresponding calibration interface if this sampled value needs calibration when front sensor.

Attention: before clicking [calibration] button, confirm earlier please whether transducer range is consistent with the real sensor range.

2 calibration methods are adopted in the calibration of sensor.Be respectively low value and high value.Concrete calibration process is as follows: (is example to calibrate 0～0.7KPa range sensors)

I. calibrate low value: pressure in the manual adjustment system pipeline, the pressure that makes the calibrating sensors position are a less value, and for example 0KPa reads the pressure of this moment from tensimeter, at the input of [calibration value] zone, button click [calibration low value] then;

Ii. calibrate high value: pressure in the manual adjustment system pipeline, the pressure that makes the calibrating sensors position are a bigger value, and for example 0.6KPa reads the pressure of this moment from tensimeter, import in [calibration value] zone, then button click [the high value of calibration];

Iii. after calibration is finished, click [finishing] button, return the main interface of calibration.Currency in the main interface can refresh according to new calibration value automatically at this moment.

Attention:, do select and test the transducer range that is complementary for the precision that guarantees to measure.

Project is provided with: when carrying out a new test, need earlier the basic parameter of pilot project is provided with, configuration information mainly comprises the sample basic parameter, pipeline parameter and corresponding test parameters.

Be provided with in the interface in project, can project implementation newly-built, revise operations such as deletion.The user management class of operation of concrete operation method and routine data library software seemingly; It can also carry out condition query to project.Can search the project information that needs fast.

Parameter declaration:

Comprise three intermediate item information in the item argument, be respectively sample parameters, sensor parameters and pipeline parameter.

Comprise bullets, applying unit, specification, sample size etc. in the sample parameters.

Sensor parameters comprises that each test point gets transducer range etc.

The pipeline parameter comprises pipeline diameter, each section burst length etc.

Flow resistance test: after setting up item argument, promptly can carry out the flow resistance test.Can record data: except real-time demonstration current data, also data recording is got off (comprising 9 pressure datas, 3 temperature datas, 1 humidity data) by curve.After data recording starts, adjust the pressure of testing in the pipeline by the switch of controlling each valve and nozzle.Off-test, system prompt user validation test data validity; Simultaneity factor is preserved test figure and the relevant information in the new projects more automatically.

Data analysis: after finishing the flow resistance test, promptly can carry out data analysis.System can read corresponding data recording and playback automatically in the interface in database, can make the operation that changes the data analysis interval.After determining a suitable interval, just can actual figure according to one's analysis, analysis result deposits database in.

Flow resistance test macro: be to open to 110 end of test pipeline, and several pressure transducers, temperature sensor and humidity sensor are installed thereon from surge tank.System constitutes simpler.

Surge tank 108: there is requirement in system to the diameter of surge tank 108, and tank diameter is greater than 10 times of test pipeline diameter, and pipeline will be not less than pipeline diameter apart from the straight-line segment edge on the straight-line segment of cylindrical shell.

Test pipeline 110: test pipeline 110 requires to be smooth pipe that its nominal diameter is consistent with the diameter that is tried rupture disk.The test pipeline 110 of system is made up of nominal diameter 50mm, 80mm, 100mm, 150mm, 5 pipelines of 200mm.Pipeline length: from cylindrical shell to the length of being tried rupture disk is that 58 times (when in the testing tube rectifier being housed) of caliber are to 92 times.Tried pipeline length after the rupture disk and also be not less than 57 times of caliber.

Pressure transducer: the pressure transducer P on the surge tank 108 ₁Be the datum pressure that test is calculated as flow resistance, therefore also selected for use and P ₀Identical absolute pressure transmitter, temperature sensor T ₁Select for use and T ₀Identical sensor is to guarantee the accuracy of computational data.On surge tank, also humidity sensor R can be installed _H, be used for soft air is carried out necessary correction.

On the test pipeline, 4 pressure transducers also are installed, P respectively _BBe absolute pressure sensor, other 3 is differential pressure pick-up.

The flow resistance test macro: the flow resistance test macro is to open to the end of test pipeline from surge tank, and several pressure transducers, temperature sensor and humidity sensor are installed thereon.System constitutes simpler.

Data computation:

1) judgement of critical flow

For the condition precedent of utilizing sonic nozzle to carry out flow rate calculation is whether fluid has reached velocity of sound at nozzle throat, can judge the pressure of nozzle exit and the ratio of stagnation pressure.According to the nozzle arrangements and the tested media of this device, allow the maximal value p of nozzle outlet pressure _2max=0.81p ₀

2) flow rate calculation

A. mass flowmeter formula (GB/T21188-2007):

$q_m=\frac{A_{\mathrm{nt}}{C}_{d^{\′}}{C}_{*}{p}_0}{\sqrt{\frac{R}{M}{T}_0}}---\left(1\right)$

In the formula:

q _m---actual mass flow, kg/s;

A _Nt---nozzle throat cross-sectional area, m ²

C _{D '}---efflux coefficient, dimensionless;

C _*---actual gas one dimension critical flow, dimensionless;

p ₀---the absolute stagnation pressure of nozzle entrance place gas, p _a

R---universal gas constant, 8.31451J/molK;

M---molal weight, kg/mol;

T ₀---the absolute stagnation temperature of nozzle entrance place gas, K;

B. nozzle throat cross-sectional area:

The throat diameter of 4 nozzles sees Table 2, calculates each nozzle throat cross-sectional area A _Nt

C. efflux coefficient: efflux coefficient can be by obtaining in the table 1.

Table 2 nozzle parameter list

Nozzle nominal diameter mm	Nozzle throat measured diameter m	Actual measurement efflux coefficient C d′
			10	0.01073	0.9842

[0154]

20	0.02146	0.9937
			40	0.04290	0.9937
50	0.05000	0.9926

D. critical flow: the critical flow of dry air is calculated by following formula:

$C_{*}=\underset{i}{\mathrm{\Σ}}{a}_i{\mathrm{\π}}^{b_i}{\mathrm{\τ}}^{c_i}---\left(2\right)$

In the formula: $\mathrm{\π}=\frac{p_0}{p_c},$ $\mathrm{\τ}=\frac{T_0}{T_c};$

p ₀---the absolute stagnation pressure of nozzle entrance place gas, p _a

T ₀---the absolute stagnation temperature of nozzle entrance place gas, K;

p _c＝3.3958MPa，T _c＝126.192K

Coefficient a _i, b _i, c _iSee Table 3:

Table 3

i	a i	b i	c i
				1	5.20514220×10 -3	0	-4
2	6.81402797×10 -1	0	0
				3	2.37746161×10 -3	0	1
4	-4.51951040×10 -4	0	2
				5	-4.51951040×10 -1	1	-7
6	1.49985326×10 -1	1	-3

i	a i	b i	c i
				7	-2.29016423×10 -3	1	0
8	3.29963865×10 -8	1	5
				9	-2.02651612×10 -3	1.5	-1
10	3.02410616×10 -4	1.5	0

[0164]

11	2.83723167×10 -1	2.5	-8
				12	-1.12914985×10 -1	3	-8
13	-2.53193390×10 -3	3	-4
				14	2.22200617×10 -5	3.5	-2
15	1.19030845×10 -3	4	-6

E. molal weight: the molal weight M=2.89626 of dry air * 10 ^-2Kg/mol;

F. the mass rate correction of soft air: formula (1) calculate for not containing CO ₂Dry air

Mass rate for obtaining the mass rate of actual air, can be revised by formula (3).

$q_m=q_{m,\mathrm{dry}}[1+X_{{\mathrm{co}}_2}(0.25+0.04732\mathrm{\π})+\frac{\mathrm{RH}}{100}A\·B]---\left(3\right)$

In the formula:

q _m---the revised CO that contains ₂The mass rate of soft air, kg/s;

q _{M, dry}---calculate by formula 1 and not contain CO ₂The mass rate of dry air, kg/s;

---contain CO in the air ₂Mole fraction (if unknown, available 0.0004);

The relative humidity of RH---air, %;

A＝0.127828τ ³-0.789422τ ²+1.63166τ-1.12818

$B=-0.000288749{\mathrm{\π}}^2-0.00191022\mathrm{\π}+0.00569536-\frac{0.0719995}{\mathrm{\π}}$

τ, π---cotype (2).

3) resistance coefficient calculates

A. mass area ratio flow

$G=\frac{4q_m}{\mathrm{\&pi;}\&times;{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="DEST\_PATH\_HSB00000011692900021.png"\; state="\{\{state\}\}">D</figure-callout>}}^2}......\left(4\right)$

B. entrance place Mach number

$M_{a1}=\frac{G}{P_o}\sqrt{\frac{Y_1^{[(k+1)/(k-1)]}}{M\&times;k/(R\&times;T_o)}}.........\left(5\right)$

C. the expansion coefficient at entrance place

${\mathrm{<figure-callout\; id="1"\; label="Y"\; filenames="DEST\_PATH\_HSB00000011692900021.png"\; state="\{\{state\}\}">Y</figure-callout>}}_1=1+\frac{(k-1)\&times;M_{a1}^2}{2}......\left(6\right)$

D. entrance place pressure

${\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="DEST\_PATH\_HSB00000011692900021.png"\; state="\{\{state\}\}">P</figure-callout>}}_1=P_o{\left(\frac{2}{2+(k-1)\&times;M_{a1}^2}\right)}^{\frac{k}{k-1}}...\left(7\right)$

E. entrance place temperature

T ₁＝T _o×(P ₁/P _o) ^(k-1)/k (8)

F. in the temperature at pressure tappings place

$T_{\mathrm{tap}}=T_1\frac{-1+\sqrt{1+2\&times;(k-1)\&times;M_{a1}^2\&times;{({\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="DEST\_PATH\_HSB00000011692900021.png"\; state="\{\{state\}\}">P</figure-callout>}}_1/P_{\mathrm{tap}})}^2\&times;(1+(k-1)\&times;M_{a1}^2/2)}}{(k-1)\&times;M_{a1}^2\&times;{({\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="DEST\_PATH\_HSB00000011692900021.png"\; state="\{\{state\}\}">P</figure-callout>}}_1/P_{\mathrm{tap}})}^2}---\left(9\right)$

G. at the velocity of sound at pressure tappings place

$V_{\mathrm{tap}}=\sqrt{R\&times;k\&times;T_{\mathrm{tap}}/M}......\left(10\right)$

H. at the specific volume at pressure tappings place

$v_{\mathrm{tap}}=\frac{R\&times;T_{\mathrm{tap}}}{M\&times;P_{\mathrm{tap}}}...\left(11\right)$

I. at the Mach number at pressure tappings place

M _a，tap＝G×v _tap/V _tap ......(12)

J. at the expansion coefficient at pressure tappings place

$Y_{\mathrm{tap}}=1+\frac{(k-1)\&times;{\left(M_{a,\mathrm{tap}}\right)}^2}{2}...\left(13\right)$

K. to the total drag coefficients of pressure tappings

$K_{\mathrm{tap}}=\frac{1/M_{a1}^2-1/{\left(M_{a,\mathrm{tap}}\right)}^2-[(k+1)/2]\&times;\ln [(M_{a,\mathrm{<figure-callout\; id="2"\; label="tap"\; filenames="DEST\_PATH\_HSB00000011692900021.png"\; state="\{\{state\}\}">tap</figure-callout>}}^2\&times;Y_1)/(M_{a1}^2\&times;Y_{\mathrm{tap}})]}{k}...\left(14\right)$

L. repeat f. to k. and calculate the resistance coefficient of entrance to each pressure tappings A, B, C and D.Each pressure tappings is calculated (9) to (14) formula.

M. the resistance coefficient between pressure tappings A and B

K _A-B＝K _B-K _A .........(15)

N. the resistance coefficient between pressure tappings B and C

K _B-C＝K _C-K _B .........(16)

O. the resistance coefficient between pressure tappings C and D

K _C-D＝K _D-K _C .........(17)

P. friction factor

f＝K _A-B×D/(4×L _A-B) .........(18)

Q. Reynolds number

R _e＝D×G/μ .........(19)

R. pipe roughness

$E=3700\&times;D\&times;[{10}^{(-1/(4\&times;\sqrt{f}))}-1.256/(R_e\&times;\sqrt{f})]---\left(20\right)$

S. the resistance coefficient of pipe between pressure tappings B and C

$K_{\mathrm{pipeB}-C}=\frac{4f{L}_{B-C}}{D}............\left(21\right)$

T. tried the resistance coefficient of rupture disk

K _Ri＝K _B-C-K _pipeB-C ............(22)

In the formula:

M---molecular weight, kg/mol;

K---specific heat ratio;

q _m---the mass rate of measurement, kg/s;

P _o---basic point pressure, Pa (A);

T _o---basic point temperature, K;

D---test pipeline internal diameter, m;

L _A-B---the duct length between pressure tappings A and B, m;

L _B-C---the duct length between pressure tappings B and C, m;

L _C-D---the duct length between pressure tappings C and D, m;

P _TapA---pressure tappings A place absolute pressure, Pa (A);

P _TapB---pressure tappings B place absolute pressure, Pa (A);

P _TapC---pressure tappings C place absolute pressure, Pa (A);

P _TapD---pressure tappings D place absolute pressure, Pa (A);

G---mass area ratio flow, kg/m ²S;

M _A1---entrance place Mach number;

P ₁---entrance place absolute pressure, Pa (A);

T---entrance place temperature, K;

T _Tap---the temperature at pressure tappings place, K;

V _Tap---the velocity of sound at pressure tappings place, m/s;

v _Tap---the specific volume at pressure tappings place, m ³/ kg;

M _{A, tap}---the Mach number at pressure tappings place;

Y _Tap---the expansion coefficient at pressure tappings place;

K _Tap---the total drag coefficients of pressure tappings;

K _A-B---the resistance coefficient between pressure tappings A and B;

K _B-C---the resistance coefficient between pressure tappings B and C;

K _C-D---the resistance coefficient between pressure tappings C and D;

F---friction factor;

μ---air is at P ₀And T ₀Viscosity under the condition, Pas;

R _e---Reynolds number;

E---pipe roughness, mm;

K _PipeB-C---the resistance coefficient of pipe between pressure tappings B and C;

K _Ri---tried the resistance coefficient of rupture disk.

Claims (9)

1. flow resistance coefficient of bursting sheet test macro, it is characterized in that: described flow resistance coefficient of bursting sheet test macro specifically includes following part: rupture disk fluid resistance test macro, rupture disk flow testing system;

Being constructed as follows of described flow resistance coefficient of bursting sheet test macro: power source (101), switch valve (104), stagnation container (105), nozzle sets (106), collection container (107), rupture disk are installed clamping plate (109), test pipeline (110), testing element (100); Wherein, all be arranged in except that test pipeline (110), testing element (100) are in the above-mentioned ingredient and test on the pipeline (110) in the mode of order arranged in series; Testing element (100), be arranged between other any two component parts or in other ingredients.

2. according to the described flow resistance coefficient of bursting sheet test macro of claim 1, it is characterized in that: also be provided with the pressure regulator (102) that is used for pressure regulation between power source (101) in described flow resistance coefficient of bursting sheet test macro and the switch valve (104).

3. according to the described flow resistance coefficient of bursting sheet test macro of claim 2, it is characterized in that:

Collection container (107) in described flow resistance coefficient of bursting sheet test macro and rupture disk are installed between the clamping plate (109) and also are provided with surge tank (108).

4. according to the described flow resistance coefficient of bursting sheet test macro of claim 3, it is characterized in that:

Power source (101) in described flow resistance coefficient of bursting sheet test macro is for providing compressed-air actuated propulsion system.

5. according to the described flow resistance coefficient of bursting sheet test macro of claim 3, it is characterized in that:

Testing element (100) in described flow resistance coefficient of bursting sheet test macro is specially pressure transducer; It specifically is arranged on one of following position or its combination:

Between power source (101) and the pressure regulator (102), between pressure regulator (102) and the switch valve (104), on the stagnation container (105), on the collection container (107), on the surge tank (108), surge tank (108) and rupture disk are installed between the clamping plate (109) and are tested pipeline (110), and rupture disk is installed the side of clamping plate (109) away from surge tank (108).

6. according to the described flow resistance coefficient of bursting sheet test macro of claim 3, it is characterized in that:

In described flow resistance coefficient of bursting sheet test macro, also include temperature sensor (111); It specifically is arranged on stagnation container (105) or/and on the surge tank (108).

7. according to one of them described flow resistance coefficient of bursting sheet test macro of claim 1～6, it is characterized in that: in described flow resistance coefficient of bursting sheet test macro, flow testing system is by including 4 sonic nozzles, 5 pneumatic ball valves, 4 pressure transducers, 1 temperature sensor, 1 stagnation container, 1 collection container;

The fluid resistance test macro includes 1 surge tank, 5 testing conduits, 2 absolute pressure pressure transducers, 3 differential pressure pressure transducers, 1 temperature sensor and 1 humidity sensor.

8. according to the described flow resistance coefficient of bursting sheet test macro of claim 7, it is characterized in that: in described flow resistance coefficient of bursting sheet test macro, also be provided with industrial computer as controller.

9. according to the described flow resistance coefficient of bursting sheet test macro of claim 8, it is characterized in that: in described flow resistance coefficient of bursting sheet test macro, also be provided with exhaust box at test pipeline end.

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